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Merge tag 'for-5.2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs updates from David Sterba:
 "This time the majority of changes are cleanups, though there's still a
  number of changes of user interest.

  User visible changes:

   - better read time and write checks to catch errors early and before
     writing data to disk (to catch potential memory corruption on data
     that get checksummed)

   - qgroups + metadata relocation: last speed up patch int the series
     to address the slowness, there should be no overhead comparing
     balance with and without qgroups

   - FIEMAP ioctl does not start a transaction unnecessarily, this can
     result in a speed up and less blocking due to IO

   - LOGICAL_INO (v1, v2) does not start transaction unnecessarily, this
     can speed up the mentioned ioctl and scrub as well

   - fsync on files with many (but not too many) hardlinks is faster,
     finer decision if the links should be fsynced individually or
     completely

   - send tries harder to find ranges to clone

   - trim/discard will skip unallocated chunks that haven't been touched
     since the last mount

  Fixes:

   - send flushes delayed allocation before start, otherwise it could
     miss some changes in case of a very recent rw->ro switch of a
     subvolume

   - fix fallocate with qgroups that could lead to space accounting
     underflow, reported as a warning

   - trim/discard ioctl honours the requested range

   - starting send and dedupe on a subvolume at the same time will let
     only one of them succeed, this is to prevent changes that send
     could miss due to dedupe; both operations are restartable

  Core changes:

   - more tree-checker validations, errors reported by fuzzing tools:
      - device item
      - inode item
      - block group profiles

   - tracepoints for extent buffer locking

   - async cow preallocates memory to avoid errors happening too deep in
     the call chain

   - metadata reservations for delalloc reworked to better adapt in
     many-writers/low-space scenarios

   - improved space flushing logic for intense DIO vs buffered workloads

   - lots of cleanups
      - removed unused struct members
      - redundant argument removal
      - properties and xattrs
      - extent buffer locking
      - selftests
      - use common file type conversions
      - many-argument functions reduction"

* tag 'for-5.2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (227 commits)
  btrfs: Use kvmalloc for allocating compressed path context
  btrfs: Factor out common extent locking code in submit_compressed_extents
  btrfs: Set io_tree only once in submit_compressed_extents
  btrfs: Replace clear_extent_bit with unlock_extent
  btrfs: Make compress_file_range take only struct async_chunk
  btrfs: Remove fs_info from struct async_chunk
  btrfs: Rename async_cow to async_chunk
  btrfs: Preallocate chunks in cow_file_range_async
  btrfs: reserve delalloc metadata differently
  btrfs: track DIO bytes in flight
  btrfs: merge calls of btrfs_setxattr and btrfs_setxattr_trans in btrfs_set_prop
  btrfs: delete unused function btrfs_set_prop_trans
  btrfs: start transaction in xattr_handler_set_prop
  btrfs: drop local copy of inode i_mode
  btrfs: drop old_fsflags in btrfs_ioctl_setflags
  btrfs: modify local copy of btrfs_inode flags
  btrfs: drop useless inode i_flags copy and restore
  btrfs: start transaction in btrfs_ioctl_setflags()
  btrfs: export btrfs_set_prop
  btrfs: refactor btrfs_set_props to validate externally
  ...
This commit is contained in:
Linus Torvalds 2019-05-07 11:34:19 -07:00
parent 78438ce18f b1c16ac978
commit 9f2e3a53f7
64 changed files with 3321 additions and 2228 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

6
fs/btrfs/acl.c
View file

@ -93,7 +93,11 @@ static int __btrfs_set_acl(struct btrfs_trans_handle *trans,
goto out;
}
ret = btrfs_setxattr(trans, inode, name, value, size, 0);
if (trans)
ret = btrfs_setxattr(trans, inode, name, value, size, 0);
else
ret = btrfs_setxattr_trans(inode, name, value, size, 0);
out:
kfree(value);

40
fs/btrfs/backref.c
View file

@ -791,7 +791,7 @@ static int add_delayed_refs(const struct btrfs_fs_info *fs_info,
count = node->ref_mod * -1;
break;
default:
BUG_ON(1);
BUG();
}
*total_refs += count;
switch (node->type) {
@ -1460,8 +1460,8 @@ int btrfs_find_all_roots(struct btrfs_trans_handle *trans,
* callers (such as fiemap) which want to know whether the extent is
* shared but do not need a ref count.
*
* This attempts to allocate a transaction in order to account for
* delayed refs, but continues on even when the alloc fails.
* This attempts to attach to the running transaction in order to account for
* delayed refs, but continues on even when no running transaction exists.
*
* Return: 0 if extent is not shared, 1 if it is shared, < 0 on error.
*/
@ -1484,13 +1484,16 @@ int btrfs_check_shared(struct btrfs_root *root, u64 inum, u64 bytenr)
tmp = ulist_alloc(GFP_NOFS);
roots = ulist_alloc(GFP_NOFS);
if (!tmp || !roots) {
ulist_free(tmp);
ulist_free(roots);
return -ENOMEM;
ret = -ENOMEM;
goto out;
}
trans = btrfs_join_transaction(root);
trans = btrfs_attach_transaction(root);
if (IS_ERR(trans)) {
if (PTR_ERR(trans) != -ENOENT && PTR_ERR(trans) != -EROFS) {
ret = PTR_ERR(trans);
goto out;
}
trans = NULL;
down_read(&fs_info->commit_root_sem);
} else {
@ -1523,6 +1526,7 @@ int btrfs_check_shared(struct btrfs_root *root, u64 inum, u64 bytenr)
} else {
up_read(&fs_info->commit_root_sem);
}
out:
ulist_free(tmp);
ulist_free(roots);
return ret;
@ -1747,7 +1751,7 @@ int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
else if (flags & BTRFS_EXTENT_FLAG_DATA)
*flags_ret = BTRFS_EXTENT_FLAG_DATA;
else
BUG_ON(1);
BUG();
return 0;
}
@ -1912,14 +1916,20 @@ int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
extent_item_objectid);
if (!search_commit_root) {
trans = btrfs_join_transaction(fs_info->extent_root);
if (IS_ERR(trans))
return PTR_ERR(trans);
btrfs_get_tree_mod_seq(fs_info, &tree_mod_seq_elem);
} else {
down_read(&fs_info->commit_root_sem);
trans = btrfs_attach_transaction(fs_info->extent_root);
if (IS_ERR(trans)) {
if (PTR_ERR(trans) != -ENOENT &&
PTR_ERR(trans) != -EROFS)
return PTR_ERR(trans);
trans = NULL;
}
}
if (trans)
btrfs_get_tree_mod_seq(fs_info, &tree_mod_seq_elem);
else
down_read(&fs_info->commit_root_sem);
ret = btrfs_find_all_leafs(trans, fs_info, extent_item_objectid,
tree_mod_seq_elem.seq, &refs,
&extent_item_pos, ignore_offset);
@ -1951,7 +1961,7 @@ int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
free_leaf_list(refs);
out:
if (!search_commit_root) {
if (trans) {
btrfs_put_tree_mod_seq(fs_info, &tree_mod_seq_elem);
btrfs_end_transaction(trans);
} else {

8
fs/btrfs/btrfs_inode.h
View file

@ -147,12 +147,6 @@ struct btrfs_inode {
*/
u64 last_unlink_trans;
/*
* Track the transaction id of the last transaction used to create a
* hard link for the inode. This is used by the log tree (fsync).
*/
u64 last_link_trans;
/*
* Number of bytes outstanding that are going to need csums. This is
* used in ENOSPC accounting.
@ -203,8 +197,6 @@ struct btrfs_inode {
struct inode vfs_inode;
};
extern unsigned char btrfs_filetype_table[];
static inline struct btrfs_inode *BTRFS_I(const struct inode *inode)
{
return container_of(inode, struct btrfs_inode, vfs_inode);

2
fs/btrfs/compression.c
View file

@ -251,7 +251,7 @@ static void end_compressed_bio_write(struct bio *bio)
cb->compressed_pages[0]->mapping = cb->inode->i_mapping;
btrfs_writepage_endio_finish_ordered(cb->compressed_pages[0],
cb->start, cb->start + cb->len - 1,
bio->bi_status ? BLK_STS_OK : BLK_STS_NOTSUPP);
bio->bi_status == BLK_STS_OK);
cb->compressed_pages[0]->mapping = NULL;
end_compressed_writeback(inode, cb);

254
fs/btrfs/ctree.c
View file

@ -21,11 +21,9 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root *root,
const struct btrfs_key *ins_key, struct btrfs_path *path,
int data_size, int extend);
static int push_node_left(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct extent_buffer *dst,
struct extent_buffer *src, int empty);
static int balance_node_right(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct extent_buffer *dst_buf,
struct extent_buffer *src_buf);
static void del_ptr(struct btrfs_root *root, struct btrfs_path *path,
@ -726,11 +724,11 @@ tree_mod_log_search(struct btrfs_fs_info *fs_info, u64 start, u64 min_seq)
return __tree_mod_log_search(fs_info, start, min_seq, 0);
}
static noinline int
tree_mod_log_eb_copy(struct btrfs_fs_info *fs_info, struct extent_buffer *dst,
static noinline int tree_mod_log_eb_copy(struct extent_buffer *dst,
struct extent_buffer *src, unsigned long dst_offset,
unsigned long src_offset, int nr_items)
{
struct btrfs_fs_info *fs_info = dst->fs_info;
int ret = 0;
struct tree_mod_elem **tm_list = NULL;
struct tree_mod_elem **tm_list_add, **tm_list_rem;
@ -950,7 +948,7 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans,
if (new_flags != 0) {
int level = btrfs_header_level(buf);
ret = btrfs_set_disk_extent_flags(trans, fs_info,
ret = btrfs_set_disk_extent_flags(trans,
buf->start,
buf->len,
new_flags, level, 0);
@ -970,7 +968,7 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans,
if (ret)
return ret;
}
clean_tree_block(fs_info, buf);
btrfs_clean_tree_block(buf);
*last_ref = 1;
}
return 0;
@ -1792,9 +1790,8 @@ static void root_sub_used(struct btrfs_root *root, u32 size)
/* given a node and slot number, this reads the blocks it points to. The
* extent buffer is returned with a reference taken (but unlocked).
*/
static noinline struct extent_buffer *
read_node_slot(struct btrfs_fs_info *fs_info, struct extent_buffer *parent,
int slot)
static noinline struct extent_buffer *read_node_slot(
struct extent_buffer *parent, int slot)
{
int level = btrfs_header_level(parent);
struct extent_buffer *eb;
@ -1806,7 +1803,7 @@ read_node_slot(struct btrfs_fs_info *fs_info, struct extent_buffer *parent,
BUG_ON(level == 0);
btrfs_node_key_to_cpu(parent, &first_key, slot);
eb = read_tree_block(fs_info, btrfs_node_blockptr(parent, slot),
eb = read_tree_block(parent->fs_info, btrfs_node_blockptr(parent, slot),
btrfs_node_ptr_generation(parent, slot),
level - 1, &first_key);
if (!IS_ERR(eb) && !extent_buffer_uptodate(eb)) {
@ -1863,7 +1860,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
return 0;
/* promote the child to a root */
child = read_node_slot(fs_info, mid, 0);
child = read_node_slot(mid, 0);
if (IS_ERR(child)) {
ret = PTR_ERR(child);
btrfs_handle_fs_error(fs_info, ret, NULL);
@ -1888,7 +1885,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
path->locks[level] = 0;
path->nodes[level] = NULL;
clean_tree_block(fs_info, mid);
btrfs_clean_tree_block(mid);
btrfs_tree_unlock(mid);
/* once for the path */
free_extent_buffer(mid);
@ -1903,7 +1900,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
BTRFS_NODEPTRS_PER_BLOCK(fs_info) / 4)
return 0;
left = read_node_slot(fs_info, parent, pslot - 1);
left = read_node_slot(parent, pslot - 1);
if (IS_ERR(left))
left = NULL;
@ -1918,7 +1915,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
}
}
right = read_node_slot(fs_info, parent, pslot + 1);
right = read_node_slot(parent, pslot + 1);
if (IS_ERR(right))
right = NULL;
@ -1936,7 +1933,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
/* first, try to make some room in the middle buffer */
if (left) {
orig_slot += btrfs_header_nritems(left);
wret = push_node_left(trans, fs_info, left, mid, 1);
wret = push_node_left(trans, left, mid, 1);
if (wret < 0)
ret = wret;
}
@ -1945,11 +1942,11 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
* then try to empty the right most buffer into the middle
*/
if (right) {
wret = push_node_left(trans, fs_info, mid, right, 1);
wret = push_node_left(trans, mid, right, 1);
if (wret < 0 && wret != -ENOSPC)
ret = wret;
if (btrfs_header_nritems(right) == 0) {
clean_tree_block(fs_info, right);
btrfs_clean_tree_block(right);
btrfs_tree_unlock(right);
del_ptr(root, path, level + 1, pslot + 1);
root_sub_used(root, right->len);
@ -1981,20 +1978,20 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
btrfs_handle_fs_error(fs_info, ret, NULL);
goto enospc;
}
wret = balance_node_right(trans, fs_info, mid, left);
wret = balance_node_right(trans, mid, left);
if (wret < 0) {
ret = wret;
goto enospc;
}
if (wret == 1) {
wret = push_node_left(trans, fs_info, left, mid, 1);
wret = push_node_left(trans, left, mid, 1);
if (wret < 0)
ret = wret;
}
BUG_ON(wret == 1);
}
if (btrfs_header_nritems(mid) == 0) {
clean_tree_block(fs_info, mid);
btrfs_clean_tree_block(mid);
btrfs_tree_unlock(mid);
del_ptr(root, path, level + 1, pslot);
root_sub_used(root, mid->len);
@ -2078,7 +2075,7 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans,
if (!parent)
return 1;
left = read_node_slot(fs_info, parent, pslot - 1);
left = read_node_slot(parent, pslot - 1);
if (IS_ERR(left))
left = NULL;
@ -2098,8 +2095,7 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans,
if (ret)
wret = 1;
else {
wret = push_node_left(trans, fs_info,
left, mid, 0);
wret = push_node_left(trans, left, mid, 0);
}
}
if (wret < 0)
@ -2131,7 +2127,7 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans,
btrfs_tree_unlock(left);
free_extent_buffer(left);
}
right = read_node_slot(fs_info, parent, pslot + 1);
right = read_node_slot(parent, pslot + 1);
if (IS_ERR(right))
right = NULL;
@ -2154,8 +2150,7 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans,
if (ret)
wret = 1;
else {
wret = balance_node_right(trans, fs_info,
right, mid);
wret = balance_node_right(trans, right, mid);
}
}
if (wret < 0)
@ -2416,6 +2411,16 @@ read_block_for_search(struct btrfs_root *root, struct btrfs_path *p,
if (tmp) {
/* first we do an atomic uptodate check */
if (btrfs_buffer_uptodate(tmp, gen, 1) > 0) {
/*
* Do extra check for first_key, eb can be stale due to
* being cached, read from scrub, or have multiple
* parents (shared tree blocks).
*/
if (btrfs_verify_level_key(tmp,
parent_level - 1, &first_key, gen)) {
free_extent_buffer(tmp);
return -EUCLEAN;
}
*eb_ret = tmp;
return 0;
}
@ -2706,7 +2711,6 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
const struct btrfs_key *key, struct btrfs_path *p,
int ins_len, int cow)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct extent_buffer *b;
int slot;
int ret;
@ -2904,7 +2908,7 @@ cow_done:
} else {
p->slots[level] = slot;
if (ins_len > 0 &&
btrfs_leaf_free_space(fs_info, b) < ins_len) {
btrfs_leaf_free_space(b) < ins_len) {
if (write_lock_level < 1) {
write_lock_level = 1;
btrfs_release_path(p);
@ -3181,11 +3185,31 @@ void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
slot = path->slots[0];
if (slot > 0) {
btrfs_item_key(eb, &disk_key, slot - 1);
BUG_ON(comp_keys(&disk_key, new_key) >= 0);
if (unlikely(comp_keys(&disk_key, new_key) >= 0)) {
btrfs_crit(fs_info,
"slot %u key (%llu %u %llu) new key (%llu %u %llu)",
slot, btrfs_disk_key_objectid(&disk_key),
btrfs_disk_key_type(&disk_key),
btrfs_disk_key_offset(&disk_key),
new_key->objectid, new_key->type,
new_key->offset);
btrfs_print_leaf(eb);
BUG();
}
}
if (slot < btrfs_header_nritems(eb) - 1) {
btrfs_item_key(eb, &disk_key, slot + 1);
BUG_ON(comp_keys(&disk_key, new_key) <= 0);
if (unlikely(comp_keys(&disk_key, new_key) <= 0)) {
btrfs_crit(fs_info,
"slot %u key (%llu %u %llu) new key (%llu %u %llu)",
slot, btrfs_disk_key_objectid(&disk_key),
btrfs_disk_key_type(&disk_key),
btrfs_disk_key_offset(&disk_key),
new_key->objectid, new_key->type,
new_key->offset);
btrfs_print_leaf(eb);
BUG();
}
}
btrfs_cpu_key_to_disk(&disk_key, new_key);
@ -3203,10 +3227,10 @@ void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
* error, and > 0 if there was no room in the left hand block.
*/
static int push_node_left(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct extent_buffer *dst,
struct extent_buffer *src, int empty)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
int push_items = 0;
int src_nritems;
int dst_nritems;
@ -3239,8 +3263,7 @@ static int push_node_left(struct btrfs_trans_handle *trans,
} else
push_items = min(src_nritems - 8, push_items);
ret = tree_mod_log_eb_copy(fs_info, dst, src, dst_nritems, 0,
push_items);
ret = tree_mod_log_eb_copy(dst, src, dst_nritems, 0, push_items);
if (ret) {
btrfs_abort_transaction(trans, ret);
return ret;
@ -3278,10 +3301,10 @@ static int push_node_left(struct btrfs_trans_handle *trans,
* this will only push up to 1/2 the contents of the left node over
*/
static int balance_node_right(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct extent_buffer *dst,
struct extent_buffer *src)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
int push_items = 0;
int max_push;
int src_nritems;
@ -3315,8 +3338,8 @@ static int balance_node_right(struct btrfs_trans_handle *trans,
(dst_nritems) *
sizeof(struct btrfs_key_ptr));
ret = tree_mod_log_eb_copy(fs_info, dst, src, 0,
src_nritems - push_items, push_items);
ret = tree_mod_log_eb_copy(dst, src, 0, src_nritems - push_items,
push_items);
if (ret) {
btrfs_abort_transaction(trans, ret);
return ret;
@ -3404,7 +3427,7 @@ static noinline int insert_new_root(struct btrfs_trans_handle *trans,
* blocknr is the block the key points to.
*/
static void insert_ptr(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info, struct btrfs_path *path,
struct btrfs_path *path,
struct btrfs_disk_key *key, u64 bytenr,
int slot, int level)
{
@ -3417,7 +3440,7 @@ static void insert_ptr(struct btrfs_trans_handle *trans,
lower = path->nodes[level];
nritems = btrfs_header_nritems(lower);
BUG_ON(slot > nritems);
BUG_ON(nritems == BTRFS_NODEPTRS_PER_BLOCK(fs_info));
BUG_ON(nritems == BTRFS_NODEPTRS_PER_BLOCK(trans->fs_info));
if (slot != nritems) {
if (level) {
ret = tree_mod_log_insert_move(lower, slot + 1, slot,
@ -3501,7 +3524,7 @@ static noinline int split_node(struct btrfs_trans_handle *trans,
root_add_used(root, fs_info->nodesize);
ASSERT(btrfs_header_level(c) == level);
ret = tree_mod_log_eb_copy(fs_info, split, c, 0, mid, c_nritems - mid);
ret = tree_mod_log_eb_copy(split, c, 0, mid, c_nritems - mid);
if (ret) {
btrfs_abort_transaction(trans, ret);
return ret;
@ -3517,7 +3540,7 @@ static noinline int split_node(struct btrfs_trans_handle *trans,
btrfs_mark_buffer_dirty(c);
btrfs_mark_buffer_dirty(split);
insert_ptr(trans, fs_info, path, &disk_key, split->start,
insert_ptr(trans, path, &disk_key, split->start,
path->slots[level + 1] + 1, level + 1);
if (path->slots[level] >= mid) {
@ -3565,9 +3588,9 @@ static int leaf_space_used(struct extent_buffer *l, int start, int nr)
* the start of the leaf data. IOW, how much room
* the leaf has left for both items and data
*/
noinline int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf)
noinline int btrfs_leaf_free_space(struct extent_buffer *leaf)
{
struct btrfs_fs_info *fs_info = leaf->fs_info;
int nritems = btrfs_header_nritems(leaf);
int ret;
@ -3586,13 +3609,13 @@ noinline int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
* min slot controls the lowest index we're willing to push to the
* right. We'll push up to and including min_slot, but no lower
*/
static noinline int __push_leaf_right(struct btrfs_fs_info *fs_info,
struct btrfs_path *path,
static noinline int __push_leaf_right(struct btrfs_path *path,
int data_size, int empty,
struct extent_buffer *right,
int free_space, u32 left_nritems,
u32 min_slot)
{
struct btrfs_fs_info *fs_info = right->fs_info;
struct extent_buffer *left = path->nodes[0];
struct extent_buffer *upper = path->nodes[1];
struct btrfs_map_token token;
@ -3626,7 +3649,8 @@ static noinline int __push_leaf_right(struct btrfs_fs_info *fs_info,
if (path->slots[0] > i)
break;
if (path->slots[0] == i) {
int space = btrfs_leaf_free_space(fs_info, left);
int space = btrfs_leaf_free_space(left);
if (space + push_space * 2 > free_space)
break;
}
@ -3655,10 +3679,10 @@ static noinline int __push_leaf_right(struct btrfs_fs_info *fs_info,
right_nritems = btrfs_header_nritems(right);
push_space = btrfs_item_end_nr(left, left_nritems - push_items);
push_space -= leaf_data_end(fs_info, left);
push_space -= leaf_data_end(left);
/* make room in the right data area */
data_end = leaf_data_end(fs_info, right);
data_end = leaf_data_end(right);
memmove_extent_buffer(right,
BTRFS_LEAF_DATA_OFFSET + data_end - push_space,
BTRFS_LEAF_DATA_OFFSET + data_end,
@ -3667,7 +3691,7 @@ static noinline int __push_leaf_right(struct btrfs_fs_info *fs_info,
/* copy from the left data area */
copy_extent_buffer(right, left, BTRFS_LEAF_DATA_OFFSET +
BTRFS_LEAF_DATA_SIZE(fs_info) - push_space,
BTRFS_LEAF_DATA_OFFSET + leaf_data_end(fs_info, left),
BTRFS_LEAF_DATA_OFFSET + leaf_data_end(left),
push_space);
memmove_extent_buffer(right, btrfs_item_nr_offset(push_items),
@ -3695,7 +3719,7 @@ static noinline int __push_leaf_right(struct btrfs_fs_info *fs_info,
if (left_nritems)
btrfs_mark_buffer_dirty(left);
else
clean_tree_block(fs_info, left);
btrfs_clean_tree_block(left);
btrfs_mark_buffer_dirty(right);
@ -3707,7 +3731,7 @@ static noinline int __push_leaf_right(struct btrfs_fs_info *fs_info,
if (path->slots[0] >= left_nritems) {
path->slots[0] -= left_nritems;
if (btrfs_header_nritems(path->nodes[0]) == 0)
clean_tree_block(fs_info, path->nodes[0]);
btrfs_clean_tree_block(path->nodes[0]);
btrfs_tree_unlock(path->nodes[0]);
free_extent_buffer(path->nodes[0]);
path->nodes[0] = right;
@ -3739,7 +3763,6 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
int min_data_size, int data_size,
int empty, u32 min_slot)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct extent_buffer *left = path->nodes[0];
struct extent_buffer *right;
struct extent_buffer *upper;
@ -3758,7 +3781,7 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_assert_tree_locked(path->nodes[1]);
right = read_node_slot(fs_info, upper, slot + 1);
right = read_node_slot(upper, slot + 1);
/*
* slot + 1 is not valid or we fail to read the right node,
* no big deal, just return.
@ -3769,7 +3792,7 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_tree_lock(right);
btrfs_set_lock_blocking_write(right);
free_space = btrfs_leaf_free_space(fs_info, right);
free_space = btrfs_leaf_free_space(right);
if (free_space < data_size)
goto out_unlock;
@ -3779,7 +3802,7 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
if (ret)
goto out_unlock;
free_space = btrfs_leaf_free_space(fs_info, right);
free_space = btrfs_leaf_free_space(right);
if (free_space < data_size)
goto out_unlock;
@ -3800,7 +3823,7 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
return 0;
}
return __push_leaf_right(fs_info, path, min_data_size, empty,
return __push_leaf_right(path, min_data_size, empty,
right, free_space, left_nritems, min_slot);
out_unlock:
btrfs_tree_unlock(right);
@ -3816,12 +3839,12 @@ out_unlock:
* item at 'max_slot' won't be touched. Use (u32)-1 to make us do all the
* items
*/
static noinline int __push_leaf_left(struct btrfs_fs_info *fs_info,
struct btrfs_path *path, int data_size,
static noinline int __push_leaf_left(struct btrfs_path *path, int data_size,
int empty, struct extent_buffer *left,
int free_space, u32 right_nritems,
u32 max_slot)
{
struct btrfs_fs_info *fs_info = left->fs_info;
struct btrfs_disk_key disk_key;
struct extent_buffer *right = path->nodes[0];
int i;
@ -3849,7 +3872,8 @@ static noinline int __push_leaf_left(struct btrfs_fs_info *fs_info,
if (path->slots[0] < i)
break;
if (path->slots[0] == i) {
int space = btrfs_leaf_free_space(fs_info, right);
int space = btrfs_leaf_free_space(right);
if (space + push_space * 2 > free_space)
break;
}
@ -3882,7 +3906,7 @@ static noinline int __push_leaf_left(struct btrfs_fs_info *fs_info,
btrfs_item_offset_nr(right, push_items - 1);
copy_extent_buffer(left, right, BTRFS_LEAF_DATA_OFFSET +
leaf_data_end(fs_info, left) - push_space,
leaf_data_end(left) - push_space,
BTRFS_LEAF_DATA_OFFSET +
btrfs_item_offset_nr(right, push_items - 1),
push_space);
@ -3909,11 +3933,11 @@ static noinline int __push_leaf_left(struct btrfs_fs_info *fs_info,
if (push_items < right_nritems) {
push_space = btrfs_item_offset_nr(right, push_items - 1) -
leaf_data_end(fs_info, right);
leaf_data_end(right);
memmove_extent_buffer(right, BTRFS_LEAF_DATA_OFFSET +
BTRFS_LEAF_DATA_SIZE(fs_info) - push_space,
BTRFS_LEAF_DATA_OFFSET +
leaf_data_end(fs_info, right), push_space);
leaf_data_end(right), push_space);
memmove_extent_buffer(right, btrfs_item_nr_offset(0),
btrfs_item_nr_offset(push_items),
@ -3935,7 +3959,7 @@ static noinline int __push_leaf_left(struct btrfs_fs_info *fs_info,
if (right_nritems)
btrfs_mark_buffer_dirty(right);
else
clean_tree_block(fs_info, right);
btrfs_clean_tree_block(right);
btrfs_item_key(right, &disk_key, 0);
fixup_low_keys(path, &disk_key, 1);
@ -3972,7 +3996,6 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
*root, struct btrfs_path *path, int min_data_size,
int data_size, int empty, u32 max_slot)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct extent_buffer *right = path->nodes[0];
struct extent_buffer *left;
int slot;
@ -3992,7 +4015,7 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_assert_tree_locked(path->nodes[1]);
left = read_node_slot(fs_info, path->nodes[1], slot - 1);
left = read_node_slot(path->nodes[1], slot - 1);
/*
* slot - 1 is not valid or we fail to read the left node,
* no big deal, just return.
@ -4003,7 +4026,7 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
btrfs_tree_lock(left);
btrfs_set_lock_blocking_write(left);
free_space = btrfs_leaf_free_space(fs_info, left);
free_space = btrfs_leaf_free_space(left);
if (free_space < data_size) {
ret = 1;
goto out;
@ -4019,13 +4042,13 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
goto out;
}
free_space = btrfs_leaf_free_space(fs_info, left);
free_space = btrfs_leaf_free_space(left);
if (free_space < data_size) {
ret = 1;
goto out;
}
return __push_leaf_left(fs_info, path, min_data_size,
return __push_leaf_left(path, min_data_size,
empty, left, free_space, right_nritems,
max_slot);
out:
@ -4039,12 +4062,12 @@ out:
* available for the resulting leaf level of the path.
*/
static noinline void copy_for_split(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct btrfs_path *path,
struct extent_buffer *l,
struct extent_buffer *right,
int slot, int mid, int nritems)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
int data_copy_size;
int rt_data_off;
int i;
@ -4055,7 +4078,7 @@ static noinline void copy_for_split(struct btrfs_trans_handle *trans,
nritems = nritems - mid;
btrfs_set_header_nritems(right, nritems);
data_copy_size = btrfs_item_end_nr(l, mid) - leaf_data_end(fs_info, l);
data_copy_size = btrfs_item_end_nr(l, mid) - leaf_data_end(l);
copy_extent_buffer(right, l, btrfs_item_nr_offset(0),
btrfs_item_nr_offset(mid),
@ -4064,7 +4087,7 @@ static noinline void copy_for_split(struct btrfs_trans_handle *trans,
copy_extent_buffer(right, l,
BTRFS_LEAF_DATA_OFFSET + BTRFS_LEAF_DATA_SIZE(fs_info) -
data_copy_size, BTRFS_LEAF_DATA_OFFSET +
leaf_data_end(fs_info, l), data_copy_size);
leaf_data_end(l), data_copy_size);
rt_data_off = BTRFS_LEAF_DATA_SIZE(fs_info) - btrfs_item_end_nr(l, mid);
@ -4079,8 +4102,7 @@ static noinline void copy_for_split(struct btrfs_trans_handle *trans,
btrfs_set_header_nritems(l, mid);
btrfs_item_key(right, &disk_key, 0);
insert_ptr(trans, fs_info, path, &disk_key, right->start,
path->slots[1] + 1, 1);
insert_ptr(trans, path, &disk_key, right->start, path->slots[1] + 1, 1);
btrfs_mark_buffer_dirty(right);
btrfs_mark_buffer_dirty(l);
@ -4115,7 +4137,6 @@ static noinline int push_for_double_split(struct btrfs_trans_handle *trans,
struct btrfs_path *path,
int data_size)
{
struct btrfs_fs_info *fs_info = root->fs_info;
int ret;
int progress = 0;
int slot;
@ -4124,7 +4145,7 @@ static noinline int push_for_double_split(struct btrfs_trans_handle *trans,
slot = path->slots[0];
if (slot < btrfs_header_nritems(path->nodes[0]))
space_needed -= btrfs_leaf_free_space(fs_info, path->nodes[0]);
space_needed -= btrfs_leaf_free_space(path->nodes[0]);
/*
* try to push all the items after our slot into the
@ -4145,14 +4166,14 @@ static noinline int push_for_double_split(struct btrfs_trans_handle *trans,
if (path->slots[0] == 0 || path->slots[0] == nritems)
return 0;
if (btrfs_leaf_free_space(fs_info, path->nodes[0]) >= data_size)
if (btrfs_leaf_free_space(path->nodes[0]) >= data_size)
return 0;
/* try to push all the items before our slot into the next leaf */
slot = path->slots[0];
space_needed = data_size;
if (slot > 0)
space_needed -= btrfs_leaf_free_space(fs_info, path->nodes[0]);
space_needed -= btrfs_leaf_free_space(path->nodes[0]);
ret = push_leaf_left(trans, root, path, 1, space_needed, 0, slot);
if (ret < 0)
return ret;
@ -4201,7 +4222,7 @@ static noinline int split_leaf(struct btrfs_trans_handle *trans,
int space_needed = data_size;
if (slot < btrfs_header_nritems(l))
space_needed -= btrfs_leaf_free_space(fs_info, l);
space_needed -= btrfs_leaf_free_space(l);
wret = push_leaf_right(trans, root, path, space_needed,
space_needed, 0, 0);
@ -4210,8 +4231,7 @@ static noinline int split_leaf(struct btrfs_trans_handle *trans,
if (wret) {
space_needed = data_size;
if (slot > 0)
space_needed -= btrfs_leaf_free_space(fs_info,
l);
space_needed -= btrfs_leaf_free_space(l);
wret = push_leaf_left(trans, root, path, space_needed,
space_needed, 0, (u32)-1);
if (wret < 0)
@ -4220,7 +4240,7 @@ static noinline int split_leaf(struct btrfs_trans_handle *trans,
l = path->nodes[0];
/* did the pushes work? */
if (btrfs_leaf_free_space(fs_info, l) >= data_size)
if (btrfs_leaf_free_space(l) >= data_size)
return 0;
}
@ -4288,7 +4308,7 @@ again:
if (split == 0) {
if (mid <= slot) {
btrfs_set_header_nritems(right, 0);
insert_ptr(trans, fs_info, path, &disk_key,
insert_ptr(trans, path, &disk_key,
right->start, path->slots[1] + 1, 1);
btrfs_tree_unlock(path->nodes[0]);
free_extent_buffer(path->nodes[0]);
@ -4297,7 +4317,7 @@ again:
path->slots[1] += 1;
} else {
btrfs_set_header_nritems(right, 0);
insert_ptr(trans, fs_info, path, &disk_key,
insert_ptr(trans, path, &disk_key,
right->start, path->slots[1], 1);
btrfs_tree_unlock(path->nodes[0]);
free_extent_buffer(path->nodes[0]);
@ -4314,7 +4334,7 @@ again:
return ret;
}
copy_for_split(trans, fs_info, path, l, right, slot, mid, nritems);
copy_for_split(trans, path, l, right, slot, mid, nritems);
if (split == 2) {
BUG_ON(num_doubles != 0);
@ -4327,7 +4347,7 @@ again:
push_for_double:
push_for_double_split(trans, root, path, data_size);
tried_avoid_double = 1;
if (btrfs_leaf_free_space(fs_info, path->nodes[0]) >= data_size)
if (btrfs_leaf_free_space(path->nodes[0]) >= data_size)
return 0;
goto again;
}
@ -4336,7 +4356,6 @@ static noinline int setup_leaf_for_split(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path, int ins_len)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_key key;
struct extent_buffer *leaf;
struct btrfs_file_extent_item *fi;
@ -4350,7 +4369,7 @@ static noinline int setup_leaf_for_split(struct btrfs_trans_handle *trans,
BUG_ON(key.type != BTRFS_EXTENT_DATA_KEY &&
key.type != BTRFS_EXTENT_CSUM_KEY);
if (btrfs_leaf_free_space(fs_info, leaf) >= ins_len)
if (btrfs_leaf_free_space(leaf) >= ins_len)
return 0;
item_size = btrfs_item_size_nr(leaf, path->slots[0]);
@ -4377,7 +4396,7 @@ static noinline int setup_leaf_for_split(struct btrfs_trans_handle *trans,
goto err;
/* the leaf has changed, it now has room. return now */
if (btrfs_leaf_free_space(fs_info, path->nodes[0]) >= ins_len)
if (btrfs_leaf_free_space(path->nodes[0]) >= ins_len)
goto err;
if (key.type == BTRFS_EXTENT_DATA_KEY) {
@ -4400,8 +4419,7 @@ err:
return ret;
}
static noinline int split_item(struct btrfs_fs_info *fs_info,
struct btrfs_path *path,
static noinline int split_item(struct btrfs_path *path,
const struct btrfs_key *new_key,
unsigned long split_offset)
{
@ -4416,7 +4434,7 @@ static noinline int split_item(struct btrfs_fs_info *fs_info,
struct btrfs_disk_key disk_key;
leaf = path->nodes[0];
BUG_ON(btrfs_leaf_free_space(fs_info, leaf) < sizeof(struct btrfs_item));
BUG_ON(btrfs_leaf_free_space(leaf) < sizeof(struct btrfs_item));
btrfs_set_path_blocking(path);
@ -4465,7 +4483,7 @@ static noinline int split_item(struct btrfs_fs_info *fs_info,
item_size - split_offset);
btrfs_mark_buffer_dirty(leaf);
BUG_ON(btrfs_leaf_free_space(fs_info, leaf) < 0);
BUG_ON(btrfs_leaf_free_space(leaf) < 0);
kfree(buf);
return 0;
}
@ -4497,7 +4515,7 @@ int btrfs_split_item(struct btrfs_trans_handle *trans,
if (ret)
return ret;
ret = split_item(root->fs_info, path, new_key, split_offset);
ret = split_item(path, new_key, split_offset);
return ret;
}
@ -4543,8 +4561,7 @@ int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
* off the end of the item or if we shift the item to chop bytes off
* the front.
*/
void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
struct btrfs_path *path, u32 new_size, int from_end)
void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end)
{
int slot;
struct extent_buffer *leaf;
@ -4567,7 +4584,7 @@ void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
return;
nritems = btrfs_header_nritems(leaf);
data_end = leaf_data_end(fs_info, leaf);
data_end = leaf_data_end(leaf);
old_data_start = btrfs_item_offset_nr(leaf, slot);
@ -4633,7 +4650,7 @@ void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
btrfs_set_item_size(leaf, item, new_size);
btrfs_mark_buffer_dirty(leaf);
if (btrfs_leaf_free_space(fs_info, leaf) < 0) {
if (btrfs_leaf_free_space(leaf) < 0) {
btrfs_print_leaf(leaf);
BUG();
}
@ -4642,8 +4659,7 @@ void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
/*
* make the item pointed to by the path bigger, data_size is the added size.
*/
void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
u32 data_size)
void btrfs_extend_item(struct btrfs_path *path, u32 data_size)
{
int slot;
struct extent_buffer *leaf;
@ -4660,9 +4676,9 @@ void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
leaf = path->nodes[0];
nritems = btrfs_header_nritems(leaf);
data_end = leaf_data_end(fs_info, leaf);
data_end = leaf_data_end(leaf);
if (btrfs_leaf_free_space(fs_info, leaf) < data_size) {
if (btrfs_leaf_free_space(leaf) < data_size) {
btrfs_print_leaf(leaf);
BUG();
}
@ -4672,9 +4688,9 @@ void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
BUG_ON(slot < 0);
if (slot >= nritems) {
btrfs_print_leaf(leaf);
btrfs_crit(fs_info, "slot %d too large, nritems %d",
btrfs_crit(leaf->fs_info, "slot %d too large, nritems %d",
slot, nritems);
BUG_ON(1);
BUG();
}
/*
@ -4701,7 +4717,7 @@ void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
btrfs_set_item_size(leaf, item, old_size + data_size);
btrfs_mark_buffer_dirty(leaf);
if (btrfs_leaf_free_space(fs_info, leaf) < 0) {
if (btrfs_leaf_free_space(leaf) < 0) {
btrfs_print_leaf(leaf);
BUG();
}
@ -4738,12 +4754,12 @@ void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
slot = path->slots[0];
nritems = btrfs_header_nritems(leaf);
data_end = leaf_data_end(fs_info, leaf);
data_end = leaf_data_end(leaf);
if (btrfs_leaf_free_space(fs_info, leaf) < total_size) {
if (btrfs_leaf_free_space(leaf) < total_size) {
btrfs_print_leaf(leaf);
btrfs_crit(fs_info, "not enough freespace need %u have %d",
total_size, btrfs_leaf_free_space(fs_info, leaf));
total_size, btrfs_leaf_free_space(leaf));
BUG();
}
@ -4754,7 +4770,7 @@ void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
btrfs_print_leaf(leaf);
btrfs_crit(fs_info, "slot %d old_data %d data_end %d",
slot, old_data, data_end);
BUG_ON(1);
BUG();
}
/*
* item0..itemN ... dataN.offset..dataN.size .. data0.size
@ -4794,7 +4810,7 @@ void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
btrfs_set_header_nritems(leaf, nritems + nr);
btrfs_mark_buffer_dirty(leaf);
if (btrfs_leaf_free_space(fs_info, leaf) < 0) {
if (btrfs_leaf_free_space(leaf) < 0) {
btrfs_print_leaf(leaf);
BUG();
}
@ -4966,7 +4982,7 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
nritems = btrfs_header_nritems(leaf);
if (slot + nr != nritems) {
int data_end = leaf_data_end(fs_info, leaf);
int data_end = leaf_data_end(leaf);
memmove_extent_buffer(leaf, BTRFS_LEAF_DATA_OFFSET +
data_end + dsize,
@ -4996,7 +5012,7 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
btrfs_set_header_level(leaf, 0);
} else {
btrfs_set_path_blocking(path);
clean_tree_block(fs_info, leaf);
btrfs_clean_tree_block(leaf);
btrfs_del_leaf(trans, root, path, leaf);
}
} else {
@ -5126,7 +5142,6 @@ int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
struct btrfs_path *path,
u64 min_trans)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct extent_buffer *cur;
struct btrfs_key found_key;
int slot;
@ -5207,7 +5222,7 @@ find_next_key:
goto out;
}
btrfs_set_path_blocking(path);
cur = read_node_slot(fs_info, cur, slot);
cur = read_node_slot(cur, slot);
if (IS_ERR(cur)) {
ret = PTR_ERR(cur);
goto out;
@ -5229,14 +5244,12 @@ out:
return ret;
}
static int tree_move_down(struct btrfs_fs_info *fs_info,
struct btrfs_path *path,
int *level)
static int tree_move_down(struct btrfs_path *path, int *level)
{
struct extent_buffer *eb;
BUG_ON(*level == 0);
eb = read_node_slot(fs_info, path->nodes[*level], path->slots[*level]);
eb = read_node_slot(path->nodes[*level], path->slots[*level]);
if (IS_ERR(eb))
return PTR_ERR(eb);
@ -5276,8 +5289,7 @@ static int tree_move_next_or_upnext(struct btrfs_path *path,
* Returns 1 if it had to move up and next. 0 is returned if it moved only next
* or down.
*/
static int tree_advance(struct btrfs_fs_info *fs_info,
struct btrfs_path *path,
static int tree_advance(struct btrfs_path *path,
int *level, int root_level,
int allow_down,
struct btrfs_key *key)
@ -5287,7 +5299,7 @@ static int tree_advance(struct btrfs_fs_info *fs_info,
if (*level == 0 || !allow_down) {
ret = tree_move_next_or_upnext(path, level, root_level);
} else {
ret = tree_move_down(fs_info, path, level);
ret = tree_move_down(path, level);
}
if (ret >= 0) {
if (*level == 0)
@ -5464,7 +5476,7 @@ int btrfs_compare_trees(struct btrfs_root *left_root,
while (1) {
if (advance_left && !left_end_reached) {
ret = tree_advance(fs_info, left_path, &left_level,
ret = tree_advance(left_path, &left_level,
left_root_level,
advance_left != ADVANCE_ONLY_NEXT,
&left_key);
@ -5475,7 +5487,7 @@ int btrfs_compare_trees(struct btrfs_root *left_root,
advance_left = 0;
}
if (advance_right && !right_end_reached) {
ret = tree_advance(fs_info, right_path, &right_level,
ret = tree_advance(right_path, &right_level,
right_root_level,
advance_right != ADVANCE_ONLY_NEXT,
&right_key);

78
fs/btrfs/ctree.h
View file

@ -41,6 +41,7 @@ extern struct kmem_cache *btrfs_bit_radix_cachep;
extern struct kmem_cache *btrfs_path_cachep;
extern struct kmem_cache *btrfs_free_space_cachep;
struct btrfs_ordered_sum;
struct btrfs_ref;
#define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
@ -1015,6 +1016,7 @@ struct btrfs_fs_info {
/* used to keep from writing metadata until there is a nice batch */
struct percpu_counter dirty_metadata_bytes;
struct percpu_counter delalloc_bytes;
struct percpu_counter dio_bytes;
s32 dirty_metadata_batch;
s32 delalloc_batch;
@ -1092,10 +1094,7 @@ struct btrfs_fs_info {
/* holds configuration and tracking. Protected by qgroup_lock */
struct rb_root qgroup_tree;
struct rb_root qgroup_op_tree;
spinlock_t qgroup_lock;
spinlock_t qgroup_op_lock;
atomic_t qgroup_op_seq;
/*
* used to avoid frequently calling ulist_alloc()/ulist_free()
@ -1152,12 +1151,6 @@ struct btrfs_fs_info {
struct mutex unused_bg_unpin_mutex;
struct mutex delete_unused_bgs_mutex;
/*
* Chunks that can't be freed yet (under a trim/discard operation)
* and will be latter freed. Protected by fs_info->chunk_mutex.
*/
struct list_head pinned_chunks;
/* Cached block sizes */
u32 nodesize;
u32 sectorsize;
@ -1348,6 +1341,12 @@ struct btrfs_root {
* manipulation with the read-only status via SUBVOL_SETFLAGS
*/
int send_in_progress;
/*
* Number of currently running deduplication operations that have a
* destination inode belonging to this root. Protected by the lock
* root_item_lock.
*/
int dedupe_in_progress;
struct btrfs_subvolume_writers *subv_writers;
atomic_t will_be_snapshotted;
atomic_t snapshot_force_cow;
@ -1540,6 +1539,21 @@ do { \
#define BTRFS_INODE_ROOT_ITEM_INIT (1 << 31)
#define BTRFS_INODE_FLAG_MASK \
(BTRFS_INODE_NODATASUM | \
BTRFS_INODE_NODATACOW | \
BTRFS_INODE_READONLY | \
BTRFS_INODE_NOCOMPRESS | \
BTRFS_INODE_PREALLOC | \
BTRFS_INODE_SYNC | \
BTRFS_INODE_IMMUTABLE | \
BTRFS_INODE_APPEND | \
BTRFS_INODE_NODUMP | \
BTRFS_INODE_NOATIME | \
BTRFS_INODE_DIRSYNC | \
BTRFS_INODE_COMPRESS | \
BTRFS_INODE_ROOT_ITEM_INIT)
struct btrfs_map_token {
const struct extent_buffer *eb;
char *kaddr;
@ -2163,18 +2177,16 @@ static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
return (btrfs_header_flags(eb) & flag) == flag;
}
static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
{
u64 flags = btrfs_header_flags(eb);
btrfs_set_header_flags(eb, flags | flag);
return (flags & flag) == flag;
}
static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
{
u64 flags = btrfs_header_flags(eb);
btrfs_set_header_flags(eb, flags & ~flag);
return (flags & flag) == flag;
}
static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
@ -2445,13 +2457,12 @@ static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
* this returns the address of the start of the last item,
* which is the stop of the leaf data stack
*/
static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info,
const struct extent_buffer *leaf)
static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
{
u32 nr = btrfs_header_nritems(leaf);
if (nr == 0)
return BTRFS_LEAF_DATA_SIZE(fs_info);
return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
return btrfs_item_offset_nr(leaf, nr - 1);
}
@ -2698,8 +2709,6 @@ void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
unsigned long count);
int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
unsigned long count, u64 transid, int wait);
void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
struct btrfs_delayed_ref_root *delayed_refs,
struct btrfs_delayed_ref_head *head);
@ -2711,8 +2720,7 @@ int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
u64 bytenr, u64 num, int reserved);
int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
u64 bytenr, u64 num_bytes);
int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
struct extent_buffer *eb);
int btrfs_exclude_logged_extents(struct extent_buffer *eb);
int btrfs_cross_ref_exist(struct btrfs_root *root,
u64 objectid, u64 offset, u64 bytenr);
struct btrfs_block_group_cache *btrfs_lookup_block_group(
@ -2745,13 +2753,9 @@ int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
struct extent_buffer *buf, int full_backref);
int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
u64 bytenr, u64 num_bytes, u64 flags,
int level, int is_data);
int btrfs_free_extent(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
u64 owner, u64 offset);
int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
u64 start, u64 len, int delalloc);
@ -2760,15 +2764,11 @@ int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
u64 bytenr, u64 num_bytes, u64 parent,
u64 root_objectid, u64 owner, u64 offset);
struct btrfs_ref *generic_ref);
int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans);
int btrfs_setup_space_cache(struct btrfs_trans_handle *trans);
int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
int btrfs_free_block_groups(struct btrfs_fs_info *info);
int btrfs_read_block_groups(struct btrfs_fs_info *info);
@ -2936,10 +2936,8 @@ int btrfs_copy_root(struct btrfs_trans_handle *trans,
struct extent_buffer **cow_ret, u64 new_root_objectid);
int btrfs_block_can_be_shared(struct btrfs_root *root,
struct extent_buffer *buf);
void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
u32 data_size);
void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
struct btrfs_path *path, u32 new_size, int from_end);
void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
int btrfs_split_item(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
@ -3015,8 +3013,7 @@ static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
{
return btrfs_next_old_item(root, p, 0);
}
int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf);
int btrfs_leaf_free_space(struct extent_buffer *leaf);
int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv,
int update_ref, int for_reloc);
@ -3756,8 +3753,7 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
int btrfs_scrub_cancel(struct btrfs_fs_info *info);
int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
struct btrfs_device *dev);
int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
struct btrfs_scrub_progress *progress);
static inline void btrfs_init_full_stripe_locks_tree(
@ -3806,6 +3802,8 @@ static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
return signal_pending(current);
}
#define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
/* Sanity test specific functions */
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
void btrfs_test_inode_set_ops(struct inode *inode);

5
fs/btrfs/delayed-inode.c
View file

@ -691,7 +691,6 @@ static int btrfs_batch_insert_items(struct btrfs_root *root,
struct btrfs_path *path,
struct btrfs_delayed_item *item)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_delayed_item *curr, *next;
int free_space;
int total_data_size = 0, total_size = 0;
@ -708,7 +707,7 @@ static int btrfs_batch_insert_items(struct btrfs_root *root,
BUG_ON(!path->nodes[0]);
leaf = path->nodes[0];
free_space = btrfs_leaf_free_space(fs_info, leaf);
free_space = btrfs_leaf_free_space(leaf);
INIT_LIST_HEAD(&head);
next = item;
@ -1692,7 +1691,7 @@ int btrfs_readdir_delayed_dir_index(struct dir_context *ctx,
name = (char *)(di + 1);
name_len = btrfs_stack_dir_name_len(di);
d_type = btrfs_filetype_table[di->type];
d_type = fs_ftype_to_dtype(di->type);
btrfs_disk_key_to_cpu(&location, &di->location);
over = !dir_emit(ctx, name, name_len,

46
fs/btrfs/delayed-ref.c
View file

@ -735,8 +735,7 @@ static void init_delayed_ref_common(struct btrfs_fs_info *fs_info,
* transaction commits.
*/
int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans,
u64 bytenr, u64 num_bytes, u64 parent,
u64 ref_root, int level, int action,
struct btrfs_ref *generic_ref,
struct btrfs_delayed_extent_op *extent_op,
int *old_ref_mod, int *new_ref_mod)
{
@ -746,10 +745,18 @@ int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans,
struct btrfs_delayed_ref_root *delayed_refs;
struct btrfs_qgroup_extent_record *record = NULL;
int qrecord_inserted;
bool is_system = (ref_root == BTRFS_CHUNK_TREE_OBJECTID);
bool is_system;
int action = generic_ref->action;
int level = generic_ref->tree_ref.level;
int ret;
u64 bytenr = generic_ref->bytenr;
u64 num_bytes = generic_ref->len;
u64 parent = generic_ref->parent;
u8 ref_type;
is_system = (generic_ref->real_root == BTRFS_CHUNK_TREE_OBJECTID);
ASSERT(generic_ref->type == BTRFS_REF_METADATA && generic_ref->action);
BUG_ON(extent_op && extent_op->is_data);
ref = kmem_cache_alloc(btrfs_delayed_tree_ref_cachep, GFP_NOFS);
if (!ref)
@ -762,7 +769,9 @@ int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans,
}
if (test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) &&
is_fstree(ref_root)) {
is_fstree(generic_ref->real_root) &&
is_fstree(generic_ref->tree_ref.root) &&
!generic_ref->skip_qgroup) {
record = kzalloc(sizeof(*record), GFP_NOFS);
if (!record) {
kmem_cache_free(btrfs_delayed_tree_ref_cachep, ref);
@ -777,13 +786,14 @@ int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans,
ref_type = BTRFS_TREE_BLOCK_REF_KEY;
init_delayed_ref_common(fs_info, &ref->node, bytenr, num_bytes,
ref_root, action, ref_type);
ref->root = ref_root;
generic_ref->tree_ref.root, action, ref_type);
ref->root = generic_ref->tree_ref.root;
ref->parent = parent;
ref->level = level;
init_delayed_ref_head(head_ref, record, bytenr, num_bytes,
ref_root, 0, action, false, is_system);
generic_ref->tree_ref.root, 0, action, false,
is_system);
head_ref->extent_op = extent_op;
delayed_refs = &trans->transaction->delayed_refs;
@ -822,10 +832,9 @@ int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans,
* add a delayed data ref. it's similar to btrfs_add_delayed_tree_ref.
*/
int btrfs_add_delayed_data_ref(struct btrfs_trans_handle *trans,
u64 bytenr, u64 num_bytes,
u64 parent, u64 ref_root,
u64 owner, u64 offset, u64 reserved, int action,
int *old_ref_mod, int *new_ref_mod)
struct btrfs_ref *generic_ref,
u64 reserved, int *old_ref_mod,
int *new_ref_mod)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
struct btrfs_delayed_data_ref *ref;
@ -833,9 +842,17 @@ int btrfs_add_delayed_data_ref(struct btrfs_trans_handle *trans,
struct btrfs_delayed_ref_root *delayed_refs;
struct btrfs_qgroup_extent_record *record = NULL;
int qrecord_inserted;
int action = generic_ref->action;
int ret;
u64 bytenr = generic_ref->bytenr;
u64 num_bytes = generic_ref->len;
u64 parent = generic_ref->parent;
u64 ref_root = generic_ref->data_ref.ref_root;
u64 owner = generic_ref->data_ref.ino;
u64 offset = generic_ref->data_ref.offset;
u8 ref_type;
ASSERT(generic_ref->type == BTRFS_REF_DATA && action);
ref = kmem_cache_alloc(btrfs_delayed_data_ref_cachep, GFP_NOFS);
if (!ref)
return -ENOMEM;
@ -859,7 +876,9 @@ int btrfs_add_delayed_data_ref(struct btrfs_trans_handle *trans,
}
if (test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) &&
is_fstree(ref_root)) {
is_fstree(ref_root) &&
is_fstree(generic_ref->real_root) &&
!generic_ref->skip_qgroup) {
record = kzalloc(sizeof(*record), GFP_NOFS);
if (!record) {
kmem_cache_free(btrfs_delayed_data_ref_cachep, ref);
@ -905,8 +924,7 @@ int btrfs_add_delayed_data_ref(struct btrfs_trans_handle *trans,
return 0;
}
int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
int btrfs_add_delayed_extent_op(struct btrfs_trans_handle *trans,
u64 bytenr, u64 num_bytes,
struct btrfs_delayed_extent_op *extent_op)
{

122
fs/btrfs/delayed-ref.h
View file

@ -176,6 +176,83 @@ struct btrfs_delayed_ref_root {
u64 qgroup_to_skip;
};
enum btrfs_ref_type {
BTRFS_REF_NOT_SET,
BTRFS_REF_DATA,
BTRFS_REF_METADATA,
BTRFS_REF_LAST,
};
struct btrfs_data_ref {
/* For EXTENT_DATA_REF */
/* Root which refers to this data extent */
u64 ref_root;
/* Inode which refers to this data extent */
u64 ino;
/*
* file_offset - extent_offset
*
* file_offset is the key.offset of the EXTENT_DATA key.
* extent_offset is btrfs_file_extent_offset() of the EXTENT_DATA data.
*/
u64 offset;
};
struct btrfs_tree_ref {
/*
* Level of this tree block
*
* Shared for skinny (TREE_BLOCK_REF) and normal tree ref.
*/
int level;
/*
* Root which refers to this tree block.
*
* For TREE_BLOCK_REF (skinny metadata, either inline or keyed)
*/
u64 root;
/* For non-skinny metadata, no special member needed */
};
struct btrfs_ref {
enum btrfs_ref_type type;
int action;
/*
* Whether this extent should go through qgroup record.
*
* Normally false, but for certain cases like delayed subtree scan,
* setting this flag can hugely reduce qgroup overhead.
*/
bool skip_qgroup;
/*
* Optional. For which root is this modification.
* Mostly used for qgroup optimization.
*
* When unset, data/tree ref init code will populate it.
* In certain cases, we're modifying reference for a different root.
* E.g. COW fs tree blocks for balance.
* In that case, tree_ref::root will be fs tree, but we're doing this
* for reloc tree, then we should set @real_root to reloc tree.
*/
u64 real_root;
u64 bytenr;
u64 len;
/* Bytenr of the parent tree block */
u64 parent;
union {
struct btrfs_data_ref data_ref;
struct btrfs_tree_ref tree_ref;
};
};
extern struct kmem_cache *btrfs_delayed_ref_head_cachep;
extern struct kmem_cache *btrfs_delayed_tree_ref_cachep;
extern struct kmem_cache *btrfs_delayed_data_ref_cachep;
@ -184,6 +261,38 @@ extern struct kmem_cache *btrfs_delayed_extent_op_cachep;
int __init btrfs_delayed_ref_init(void);
void __cold btrfs_delayed_ref_exit(void);
static inline void btrfs_init_generic_ref(struct btrfs_ref *generic_ref,
int action, u64 bytenr, u64 len, u64 parent)
{
generic_ref->action = action;
generic_ref->bytenr = bytenr;
generic_ref->len = len;
generic_ref->parent = parent;
}
static inline void btrfs_init_tree_ref(struct btrfs_ref *generic_ref,
int level, u64 root)
{
/* If @real_root not set, use @root as fallback */
if (!generic_ref->real_root)
generic_ref->real_root = root;
generic_ref->tree_ref.level = level;
generic_ref->tree_ref.root = root;
generic_ref->type = BTRFS_REF_METADATA;
}
static inline void btrfs_init_data_ref(struct btrfs_ref *generic_ref,
u64 ref_root, u64 ino, u64 offset)
{
/* If @real_root not set, use @root as fallback */
if (!generic_ref->real_root)
generic_ref->real_root = ref_root;
generic_ref->data_ref.ref_root = ref_root;
generic_ref->data_ref.ino = ino;
generic_ref->data_ref.offset = offset;
generic_ref->type = BTRFS_REF_DATA;
}
static inline struct btrfs_delayed_extent_op *
btrfs_alloc_delayed_extent_op(void)
{
@ -224,17 +333,14 @@ static inline void btrfs_put_delayed_ref_head(struct btrfs_delayed_ref_head *hea
}
int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans,
u64 bytenr, u64 num_bytes, u64 parent,
u64 ref_root, int level, int action,
struct btrfs_ref *generic_ref,
struct btrfs_delayed_extent_op *extent_op,
int *old_ref_mod, int *new_ref_mod);
int btrfs_add_delayed_data_ref(struct btrfs_trans_handle *trans,
u64 bytenr, u64 num_bytes,
u64 parent, u64 ref_root,
u64 owner, u64 offset, u64 reserved, int action,
int *old_ref_mod, int *new_ref_mod);
int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
struct btrfs_ref *generic_ref,
u64 reserved, int *old_ref_mod,
int *new_ref_mod);
int btrfs_add_delayed_extent_op(struct btrfs_trans_handle *trans,
u64 bytenr, u64 num_bytes,
struct btrfs_delayed_extent_op *extent_op);
void btrfs_merge_delayed_refs(struct btrfs_trans_handle *trans,

8
fs/btrfs/dev-replace.c
View file

@ -273,9 +273,9 @@ error:
* called from commit_transaction. Writes changed device replace state to
* disk.
*/
int btrfs_run_dev_replace(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info)
int btrfs_run_dev_replace(struct btrfs_trans_handle *trans)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
int ret;
struct btrfs_root *dev_root = fs_info->dev_root;
struct btrfs_path *path;
@ -662,7 +662,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
btrfs_device_set_disk_total_bytes(tgt_device,
src_device->disk_total_bytes);
btrfs_device_set_bytes_used(tgt_device, src_device->bytes_used);
ASSERT(list_empty(&src_device->resized_list));
ASSERT(list_empty(&src_device->post_commit_list));
tgt_device->commit_total_bytes = src_device->commit_total_bytes;
tgt_device->commit_bytes_used = src_device->bytes_used;
@ -696,7 +696,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
/* replace the sysfs entry */
btrfs_sysfs_rm_device_link(fs_info->fs_devices, src_device);
btrfs_rm_dev_replace_free_srcdev(fs_info, src_device);
btrfs_rm_dev_replace_free_srcdev(src_device);
/* write back the superblocks */
trans = btrfs_start_transaction(root, 0);

3
fs/btrfs/dev-replace.h
View file

@ -9,8 +9,7 @@
struct btrfs_ioctl_dev_replace_args;
int btrfs_init_dev_replace(struct btrfs_fs_info *fs_info);
int btrfs_run_dev_replace(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
int btrfs_run_dev_replace(struct btrfs_trans_handle *trans);
int btrfs_dev_replace_by_ioctl(struct btrfs_fs_info *fs_info,
struct btrfs_ioctl_dev_replace_args *args);
void btrfs_dev_replace_status(struct btrfs_fs_info *fs_info,

5
fs/btrfs/dir-item.c
View file

@ -36,7 +36,7 @@ static struct btrfs_dir_item *insert_with_overflow(struct btrfs_trans_handle
di = btrfs_match_dir_item_name(fs_info, path, name, name_len);
if (di)
return ERR_PTR(-EEXIST);
btrfs_extend_item(fs_info, path, data_size);
btrfs_extend_item(path, data_size);
} else if (ret < 0)
return ERR_PTR(ret);
WARN_ON(ret > 0);
@ -429,8 +429,7 @@ int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
start = btrfs_item_ptr_offset(leaf, path->slots[0]);
memmove_extent_buffer(leaf, ptr, ptr + sub_item_len,
item_len - (ptr + sub_item_len - start));
btrfs_truncate_item(root->fs_info, path,
item_len - sub_item_len, 1);
btrfs_truncate_item(path, item_len - sub_item_len, 1);
}
return ret;
}

225
fs/btrfs/disk-io.c
View file

@ -260,15 +260,12 @@ void btrfs_csum_final(u32 crc, u8 *result)
}
/*
* compute the csum for a btree block, and either verify it or write it
* into the csum field of the block.
* Compute the csum of a btree block and store the result to provided buffer.
*
* Returns error if the extent buffer cannot be mapped.
*/
static int csum_tree_block(struct btrfs_fs_info *fs_info,
struct extent_buffer *buf,
int verify)
static int csum_tree_block(struct extent_buffer *buf, u8 *result)
{
u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
char result[BTRFS_CSUM_SIZE];
unsigned long len;
unsigned long cur_len;
unsigned long offset = BTRFS_CSUM_SIZE;
@ -288,7 +285,7 @@ static int csum_tree_block(struct btrfs_fs_info *fs_info,
*/
err = map_private_extent_buffer(buf, offset, 32,
&kaddr, &map_start, &map_len);
if (err)
if (WARN_ON(err))
return err;
cur_len = min(len, map_len - (offset - map_start));
crc = btrfs_csum_data(kaddr + offset - map_start,
@ -300,23 +297,6 @@ static int csum_tree_block(struct btrfs_fs_info *fs_info,
btrfs_csum_final(crc, result);
if (verify) {
if (memcmp_extent_buffer(buf, result, 0, csum_size)) {
u32 val;
u32 found = 0;
memcpy(&found, result, csum_size);
read_extent_buffer(buf, &val, 0, csum_size);
btrfs_warn_rl(fs_info,
"%s checksum verify failed on %llu wanted %X found %X level %d",
fs_info->sb->s_id, buf->start,
val, found, btrfs_header_level(buf));
return -EUCLEAN;
}
} else {
write_extent_buffer(buf, result, 0, csum_size);
}
return 0;
}
@ -414,22 +394,21 @@ static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info,
return ret;
}
static int verify_level_key(struct btrfs_fs_info *fs_info,
struct extent_buffer *eb, int level,
struct btrfs_key *first_key, u64 parent_transid)
int btrfs_verify_level_key(struct extent_buffer *eb, int level,
struct btrfs_key *first_key, u64 parent_transid)
{
struct btrfs_fs_info *fs_info = eb->fs_info;
int found_level;
struct btrfs_key found_key;
int ret;
found_level = btrfs_header_level(eb);
if (found_level != level) {
#ifdef CONFIG_BTRFS_DEBUG
WARN_ON(1);
WARN(IS_ENABLED(CONFIG_BTRFS_DEBUG),
KERN_ERR "BTRFS: tree level check failed\n");
btrfs_err(fs_info,
"tree level mismatch detected, bytenr=%llu level expected=%u has=%u",
eb->start, level, found_level);
#endif
return -EIO;
}
@ -450,9 +429,9 @@ static int verify_level_key(struct btrfs_fs_info *fs_info,
btrfs_item_key_to_cpu(eb, &found_key, 0);
ret = btrfs_comp_cpu_keys(first_key, &found_key);
#ifdef CONFIG_BTRFS_DEBUG
if (ret) {
WARN_ON(1);
WARN(IS_ENABLED(CONFIG_BTRFS_DEBUG),
KERN_ERR "BTRFS: tree first key check failed\n");
btrfs_err(fs_info,
"tree first key mismatch detected, bytenr=%llu parent_transid=%llu key expected=(%llu,%u,%llu) has=(%llu,%u,%llu)",
eb->start, parent_transid, first_key->objectid,
@ -460,7 +439,6 @@ static int verify_level_key(struct btrfs_fs_info *fs_info,
found_key.objectid, found_key.type,
found_key.offset);
}
#endif
return ret;
}
@ -472,11 +450,11 @@ static int verify_level_key(struct btrfs_fs_info *fs_info,
* @level: expected level, mandatory check
* @first_key: expected key of first slot, skip check if NULL
*/
static int btree_read_extent_buffer_pages(struct btrfs_fs_info *fs_info,
struct extent_buffer *eb,
static int btree_read_extent_buffer_pages(struct extent_buffer *eb,
u64 parent_transid, int level,
struct btrfs_key *first_key)
{
struct btrfs_fs_info *fs_info = eb->fs_info;
struct extent_io_tree *io_tree;
int failed = 0;
int ret;
@ -487,14 +465,13 @@ static int btree_read_extent_buffer_pages(struct btrfs_fs_info *fs_info,
io_tree = &BTRFS_I(fs_info->btree_inode)->io_tree;
while (1) {
clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags);
ret = read_extent_buffer_pages(io_tree, eb, WAIT_COMPLETE,
mirror_num);
ret = read_extent_buffer_pages(eb, WAIT_COMPLETE, mirror_num);
if (!ret) {
if (verify_parent_transid(io_tree, eb,
parent_transid, 0))
ret = -EIO;
else if (verify_level_key(fs_info, eb, level,
first_key, parent_transid))
else if (btrfs_verify_level_key(eb, level,
first_key, parent_transid))
ret = -EUCLEAN;
else
break;
@ -519,7 +496,7 @@ static int btree_read_extent_buffer_pages(struct btrfs_fs_info *fs_info,
}
if (failed && !ret && failed_mirror)
repair_eb_io_failure(fs_info, eb, failed_mirror);
btrfs_repair_eb_io_failure(eb, failed_mirror);
return ret;
}
@ -533,7 +510,10 @@ static int csum_dirty_buffer(struct btrfs_fs_info *fs_info, struct page *page)
{
u64 start = page_offset(page);
u64 found_start;
u8 result[BTRFS_CSUM_SIZE];
u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
struct extent_buffer *eb;
int ret;
eb = (struct extent_buffer *)page->private;
if (page != eb->pages[0])
@ -552,12 +532,28 @@ static int csum_dirty_buffer(struct btrfs_fs_info *fs_info, struct page *page)
ASSERT(memcmp_extent_buffer(eb, fs_info->fs_devices->metadata_uuid,
btrfs_header_fsid(), BTRFS_FSID_SIZE) == 0);
return csum_tree_block(fs_info, eb, 0);
if (csum_tree_block(eb, result))
return -EINVAL;
if (btrfs_header_level(eb))
ret = btrfs_check_node(eb);
else
ret = btrfs_check_leaf_full(eb);
if (ret < 0) {
btrfs_err(fs_info,
"block=%llu write time tree block corruption detected",
eb->start);
return ret;
}
write_extent_buffer(eb, result, 0, csum_size);
return 0;
}
static int check_tree_block_fsid(struct btrfs_fs_info *fs_info,
struct extent_buffer *eb)
static int check_tree_block_fsid(struct extent_buffer *eb)
{
struct btrfs_fs_info *fs_info = eb->fs_info;
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
u8 fsid[BTRFS_FSID_SIZE];
int ret = 1;
@ -595,7 +591,9 @@ static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
struct extent_buffer *eb;
struct btrfs_root *root = BTRFS_I(page->mapping->host)->root;
struct btrfs_fs_info *fs_info = root->fs_info;
u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
int ret = 0;
u8 result[BTRFS_CSUM_SIZE];
int reads_done;
if (!page->private)
@ -625,7 +623,7 @@ static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
ret = -EIO;
goto err;
}
if (check_tree_block_fsid(fs_info, eb)) {
if (check_tree_block_fsid(eb)) {
btrfs_err_rl(fs_info, "bad fsid on block %llu",
eb->start);
ret = -EIO;
@ -642,25 +640,44 @@ static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb),
eb, found_level);
ret = csum_tree_block(fs_info, eb, 1);
ret = csum_tree_block(eb, result);
if (ret)
goto err;
if (memcmp_extent_buffer(eb, result, 0, csum_size)) {
u32 val;
u32 found = 0;
memcpy(&found, result, csum_size);
read_extent_buffer(eb, &val, 0, csum_size);
btrfs_warn_rl(fs_info,
"%s checksum verify failed on %llu wanted %x found %x level %d",
fs_info->sb->s_id, eb->start,
val, found, btrfs_header_level(eb));
ret = -EUCLEAN;
goto err;
}
/*
* If this is a leaf block and it is corrupt, set the corrupt bit so
* that we don't try and read the other copies of this block, just
* return -EIO.
*/
if (found_level == 0 && btrfs_check_leaf_full(fs_info, eb)) {
if (found_level == 0 && btrfs_check_leaf_full(eb)) {
set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags);
ret = -EIO;
}
if (found_level > 0 && btrfs_check_node(fs_info, eb))
if (found_level > 0 && btrfs_check_node(eb))
ret = -EIO;
if (!ret)
set_extent_buffer_uptodate(eb);
else
btrfs_err(fs_info,
"block=%llu read time tree block corruption detected",
eb->start);
err:
if (reads_done &&
test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags))
@ -867,11 +884,10 @@ static int check_async_write(struct btrfs_inode *bi)
return 1;
}
static blk_status_t btree_submit_bio_hook(void *private_data, struct bio *bio,
int mirror_num, unsigned long bio_flags,
u64 bio_offset)
static blk_status_t btree_submit_bio_hook(struct inode *inode, struct bio *bio,
int mirror_num,
unsigned long bio_flags)
{
struct inode *inode = private_data;
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
int async = check_async_write(BTRFS_I(inode));
blk_status_t ret;
@ -897,8 +913,7 @@ static blk_status_t btree_submit_bio_hook(void *private_data, struct bio *bio,
* checksumming can happen in parallel across all CPUs
*/
ret = btrfs_wq_submit_bio(fs_info, bio, mirror_num, 0,
bio_offset, private_data,
btree_submit_bio_start);
0, inode, btree_submit_bio_start);
}
if (ret)
@ -1017,22 +1032,23 @@ static const struct address_space_operations btree_aops = {
void readahead_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr)
{
struct extent_buffer *buf = NULL;
struct inode *btree_inode = fs_info->btree_inode;
int ret;
buf = btrfs_find_create_tree_block(fs_info, bytenr);
if (IS_ERR(buf))
return;
read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree,
buf, WAIT_NONE, 0);
free_extent_buffer(buf);
ret = read_extent_buffer_pages(buf, WAIT_NONE, 0);
if (ret < 0)
free_extent_buffer_stale(buf);
else
free_extent_buffer(buf);
}
int reada_tree_block_flagged(struct btrfs_fs_info *fs_info, u64 bytenr,
int mirror_num, struct extent_buffer **eb)
{
struct extent_buffer *buf = NULL;
struct inode *btree_inode = fs_info->btree_inode;
struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree;
int ret;
buf = btrfs_find_create_tree_block(fs_info, bytenr);
@ -1041,15 +1057,14 @@ int reada_tree_block_flagged(struct btrfs_fs_info *fs_info, u64 bytenr,
set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags);
ret = read_extent_buffer_pages(io_tree, buf, WAIT_PAGE_LOCK,
mirror_num);
ret = read_extent_buffer_pages(buf, WAIT_PAGE_LOCK, mirror_num);
if (ret) {
free_extent_buffer(buf);
free_extent_buffer_stale(buf);
return ret;
}
if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) {
free_extent_buffer(buf);
free_extent_buffer_stale(buf);
return -EIO;
} else if (extent_buffer_uptodate(buf)) {
*eb = buf;
@ -1068,19 +1083,6 @@ struct extent_buffer *btrfs_find_create_tree_block(
return alloc_extent_buffer(fs_info, bytenr);
}
int btrfs_write_tree_block(struct extent_buffer *buf)
{
return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start,
buf->start + buf->len - 1);
}
void btrfs_wait_tree_block_writeback(struct extent_buffer *buf)
{
filemap_fdatawait_range(buf->pages[0]->mapping,
buf->start, buf->start + buf->len - 1);
}
/*
* Read tree block at logical address @bytenr and do variant basic but critical
* verification.
@ -1100,19 +1102,19 @@ struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr,
if (IS_ERR(buf))
return buf;
ret = btree_read_extent_buffer_pages(fs_info, buf, parent_transid,
ret = btree_read_extent_buffer_pages(buf, parent_transid,
level, first_key);
if (ret) {
free_extent_buffer(buf);
free_extent_buffer_stale(buf);
return ERR_PTR(ret);
}
return buf;
}
void clean_tree_block(struct btrfs_fs_info *fs_info,
struct extent_buffer *buf)
void btrfs_clean_tree_block(struct extent_buffer *buf)
{
struct btrfs_fs_info *fs_info = buf->fs_info;
if (btrfs_header_generation(buf) ==
fs_info->running_transaction->transid) {
btrfs_assert_tree_locked(buf);
@ -1208,7 +1210,8 @@ static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info,
root->log_transid_committed = -1;
root->last_log_commit = 0;
if (!dummy)
extent_io_tree_init(&root->dirty_log_pages, NULL);
extent_io_tree_init(fs_info, &root->dirty_log_pages,
IO_TREE_ROOT_DIRTY_LOG_PAGES, NULL);
memset(&root->root_key, 0, sizeof(root->root_key));
memset(&root->root_item, 0, sizeof(root->root_item));
@ -1255,9 +1258,9 @@ struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info)
#endif
struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
u64 objectid)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
struct extent_buffer *leaf;
struct btrfs_root *tree_root = fs_info->tree_root;
struct btrfs_root *root;
@ -2138,8 +2141,9 @@ static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info)
inode->i_mapping->a_ops = &btree_aops;
RB_CLEAR_NODE(&BTRFS_I(inode)->rb_node);
extent_io_tree_init(&BTRFS_I(inode)->io_tree, inode);
BTRFS_I(inode)->io_tree.track_uptodate = 0;
extent_io_tree_init(fs_info, &BTRFS_I(inode)->io_tree,
IO_TREE_INODE_IO, inode);
BTRFS_I(inode)->io_tree.track_uptodate = false;
extent_map_tree_init(&BTRFS_I(inode)->extent_tree);
BTRFS_I(inode)->io_tree.ops = &btree_extent_io_ops;
@ -2162,7 +2166,6 @@ static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info)
spin_lock_init(&fs_info->qgroup_lock);
mutex_init(&fs_info->qgroup_ioctl_lock);
fs_info->qgroup_tree = RB_ROOT;
fs_info->qgroup_op_tree = RB_ROOT;
INIT_LIST_HEAD(&fs_info->dirty_qgroups);
fs_info->qgroup_seq = 1;
fs_info->qgroup_ulist = NULL;
@ -2630,11 +2633,17 @@ int open_ctree(struct super_block *sb,
goto fail;
}
ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, GFP_KERNEL);
ret = percpu_counter_init(&fs_info->dio_bytes, 0, GFP_KERNEL);
if (ret) {
err = ret;
goto fail_srcu;
}
ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, GFP_KERNEL);
if (ret) {
err = ret;
goto fail_dio_bytes;
}
fs_info->dirty_metadata_batch = PAGE_SIZE *
(1 + ilog2(nr_cpu_ids));
@ -2667,7 +2676,6 @@ int open_ctree(struct super_block *sb,
spin_lock_init(&fs_info->defrag_inodes_lock);
spin_lock_init(&fs_info->tree_mod_seq_lock);
spin_lock_init(&fs_info->super_lock);
spin_lock_init(&fs_info->qgroup_op_lock);
spin_lock_init(&fs_info->buffer_lock);
spin_lock_init(&fs_info->unused_bgs_lock);
rwlock_init(&fs_info->tree_mod_log_lock);
@ -2694,7 +2702,6 @@ int open_ctree(struct super_block *sb,
atomic_set(&fs_info->async_delalloc_pages, 0);
atomic_set(&fs_info->defrag_running, 0);
atomic_set(&fs_info->qgroup_op_seq, 0);
atomic_set(&fs_info->reada_works_cnt, 0);
atomic_set(&fs_info->nr_delayed_iputs, 0);
atomic64_set(&fs_info->tree_mod_seq, 0);
@ -2748,8 +2755,10 @@ int open_ctree(struct super_block *sb,
fs_info->block_group_cache_tree = RB_ROOT;
fs_info->first_logical_byte = (u64)-1;
extent_io_tree_init(&fs_info->freed_extents[0], NULL);
extent_io_tree_init(&fs_info->freed_extents[1], NULL);
extent_io_tree_init(fs_info, &fs_info->freed_extents[0],
IO_TREE_FS_INFO_FREED_EXTENTS0, NULL);
extent_io_tree_init(fs_info, &fs_info->freed_extents[1],
IO_TREE_FS_INFO_FREED_EXTENTS1, NULL);
fs_info->pinned_extents = &fs_info->freed_extents[0];
set_bit(BTRFS_FS_BARRIER, &fs_info->flags);
@ -2776,8 +2785,6 @@ int open_ctree(struct super_block *sb,
init_waitqueue_head(&fs_info->async_submit_wait);
init_waitqueue_head(&fs_info->delayed_iputs_wait);
INIT_LIST_HEAD(&fs_info->pinned_chunks);
/* Usable values until the real ones are cached from the superblock */
fs_info->nodesize = 4096;
fs_info->sectorsize = 4096;
@ -3335,6 +3342,8 @@ fail_delalloc_bytes:
percpu_counter_destroy(&fs_info->delalloc_bytes);
fail_dirty_metadata_bytes:
percpu_counter_destroy(&fs_info->dirty_metadata_bytes);
fail_dio_bytes:
percpu_counter_destroy(&fs_info->dio_bytes);
fail_srcu:
cleanup_srcu_struct(&fs_info->subvol_srcu);
fail:
@ -4016,6 +4025,10 @@ void close_ctree(struct btrfs_fs_info *fs_info)
percpu_counter_sum(&fs_info->delalloc_bytes));
}
if (percpu_counter_sum(&fs_info->dio_bytes))
btrfs_info(fs_info, "at unmount dio bytes count %lld",
percpu_counter_sum(&fs_info->dio_bytes));
btrfs_sysfs_remove_mounted(fs_info);
btrfs_sysfs_remove_fsid(fs_info->fs_devices);
@ -4042,25 +4055,17 @@ void close_ctree(struct btrfs_fs_info *fs_info)
btrfsic_unmount(fs_info->fs_devices);
#endif
btrfs_close_devices(fs_info->fs_devices);
btrfs_mapping_tree_free(&fs_info->mapping_tree);
btrfs_close_devices(fs_info->fs_devices);
percpu_counter_destroy(&fs_info->dirty_metadata_bytes);
percpu_counter_destroy(&fs_info->delalloc_bytes);
percpu_counter_destroy(&fs_info->dio_bytes);
percpu_counter_destroy(&fs_info->dev_replace.bio_counter);
cleanup_srcu_struct(&fs_info->subvol_srcu);
btrfs_free_stripe_hash_table(fs_info);
btrfs_free_ref_cache(fs_info);
while (!list_empty(&fs_info->pinned_chunks)) {
struct extent_map *em;
em = list_first_entry(&fs_info->pinned_chunks,
struct extent_map, list);
list_del_init(&em->list);
free_extent_map(em);
}
}
int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid,
@ -4114,7 +4119,7 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
* So here we should only check item pointers, not item data.
*/
if (btrfs_header_level(buf) == 0 &&
btrfs_check_leaf_relaxed(fs_info, buf)) {
btrfs_check_leaf_relaxed(buf)) {
btrfs_print_leaf(buf);
ASSERT(0);
}
@ -4157,10 +4162,7 @@ void btrfs_btree_balance_dirty_nodelay(struct btrfs_fs_info *fs_info)
int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid, int level,
struct btrfs_key *first_key)
{
struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root;
struct btrfs_fs_info *fs_info = root->fs_info;
return btree_read_extent_buffer_pages(fs_info, buf, parent_transid,
return btree_read_extent_buffer_pages(buf, parent_transid,
level, first_key);
}
@ -4484,10 +4486,17 @@ void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *cur_trans,
void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans,
struct btrfs_fs_info *fs_info)
{
struct btrfs_device *dev, *tmp;
btrfs_cleanup_dirty_bgs(cur_trans, fs_info);
ASSERT(list_empty(&cur_trans->dirty_bgs));
ASSERT(list_empty(&cur_trans->io_bgs));
list_for_each_entry_safe(dev, tmp, &cur_trans->dev_update_list,
post_commit_list) {
list_del_init(&dev->post_commit_list);
}
btrfs_destroy_delayed_refs(cur_trans, fs_info);
cur_trans->state = TRANS_STATE_COMMIT_START;

7
fs/btrfs/disk-io.h
View file

@ -39,6 +39,8 @@ static inline u64 btrfs_sb_offset(int mirror)
struct btrfs_device;
struct btrfs_fs_devices;
int btrfs_verify_level_key(struct extent_buffer *eb, int level,
struct btrfs_key *first_key, u64 parent_transid);
struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr,
u64 parent_transid, int level,
struct btrfs_key *first_key);
@ -48,7 +50,7 @@ int reada_tree_block_flagged(struct btrfs_fs_info *fs_info, u64 bytenr,
struct extent_buffer *btrfs_find_create_tree_block(
struct btrfs_fs_info *fs_info,
u64 bytenr);
void clean_tree_block(struct btrfs_fs_info *fs_info, struct extent_buffer *buf);
void btrfs_clean_tree_block(struct extent_buffer *buf);
int open_ctree(struct super_block *sb,
struct btrfs_fs_devices *fs_devices,
char *options);
@ -123,8 +125,6 @@ blk_status_t btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
extent_submit_bio_start_t *submit_bio_start);
blk_status_t btrfs_submit_bio_done(void *private_data, struct bio *bio,
int mirror_num);
int btrfs_write_tree_block(struct extent_buffer *buf);
void btrfs_wait_tree_block_writeback(struct extent_buffer *buf);
int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
@ -134,7 +134,6 @@ void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *trans,
void btrfs_cleanup_one_transaction(struct btrfs_transaction *trans,
struct btrfs_fs_info *fs_info);
struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
u64 objectid);
int btree_lock_page_hook(struct page *page, void *data,
void (*flush_fn)(void *));

661
fs/btrfs/extent-tree.c
View file

File diff suppressed because it is too large Load diff

360
fs/btrfs/extent_io.c
View file

@ -109,8 +109,6 @@ static inline void __btrfs_debug_check_extent_io_range(const char *caller,
#define btrfs_debug_check_extent_io_range(c, s, e) do {} while (0)
#endif
#define BUFFER_LRU_MAX 64
struct tree_entry {
u64 start;
u64 end;
@ -151,36 +149,53 @@ static int __must_check submit_one_bio(struct bio *bio, int mirror_num,
unsigned long bio_flags)
{
blk_status_t ret = 0;
struct bio_vec *bvec = bio_last_bvec_all(bio);
struct bio_vec bv;
struct extent_io_tree *tree = bio->bi_private;
u64 start;
mp_bvec_last_segment(bvec, &bv);
start = page_offset(bv.bv_page) + bv.bv_offset;
bio->bi_private = NULL;
if (tree->ops)
ret = tree->ops->submit_bio_hook(tree->private_data, bio,
mirror_num, bio_flags, start);
mirror_num, bio_flags);
else
btrfsic_submit_bio(bio);
return blk_status_to_errno(ret);
}
static void flush_write_bio(struct extent_page_data *epd)
/* Cleanup unsubmitted bios */
static void end_write_bio(struct extent_page_data *epd, int ret)
{
if (epd->bio) {
int ret;
ret = submit_one_bio(epd->bio, 0, 0);
BUG_ON(ret < 0); /* -ENOMEM */
epd->bio->bi_status = errno_to_blk_status(ret);
bio_endio(epd->bio);
epd->bio = NULL;
}
}
/*
* Submit bio from extent page data via submit_one_bio
*
* Return 0 if everything is OK.
* Return <0 for error.
*/
static int __must_check flush_write_bio(struct extent_page_data *epd)
{
int ret = 0;
if (epd->bio) {
ret = submit_one_bio(epd->bio, 0, 0);
/*
* Clean up of epd->bio is handled by its endio function.
* And endio is either triggered by successful bio execution
* or the error handler of submit bio hook.
* So at this point, no matter what happened, we don't need
* to clean up epd->bio.
*/
epd->bio = NULL;
}
return ret;
}
int __init extent_io_init(void)
{
extent_state_cache = kmem_cache_create("btrfs_extent_state",
@ -232,14 +247,46 @@ void __cold extent_io_exit(void)
bioset_exit(&btrfs_bioset);
}
void extent_io_tree_init(struct extent_io_tree *tree,
void extent_io_tree_init(struct btrfs_fs_info *fs_info,
struct extent_io_tree *tree, unsigned int owner,
void *private_data)
{
tree->fs_info = fs_info;
tree->state = RB_ROOT;
tree->ops = NULL;
tree->dirty_bytes = 0;
spin_lock_init(&tree->lock);
tree->private_data = private_data;
tree->owner = owner;
}
void extent_io_tree_release(struct extent_io_tree *tree)
{
spin_lock(&tree->lock);
/*
* Do a single barrier for the waitqueue_active check here, the state
* of the waitqueue should not change once extent_io_tree_release is
* called.
*/
smp_mb();
while (!RB_EMPTY_ROOT(&tree->state)) {
struct rb_node *node;
struct extent_state *state;
node = rb_first(&tree->state);
state = rb_entry(node, struct extent_state, rb_node);
rb_erase(&state->rb_node, &tree->state);
RB_CLEAR_NODE(&state->rb_node);
/*
* btree io trees aren't supposed to have tasks waiting for
* changes in the flags of extent states ever.
*/
ASSERT(!waitqueue_active(&state->wq));
free_extent_state(state);
cond_resched_lock(&tree->lock);
}
spin_unlock(&tree->lock);
}
static struct extent_state *alloc_extent_state(gfp_t mask)
@ -400,7 +447,7 @@ static void merge_state(struct extent_io_tree *tree,
struct extent_state *other;
struct rb_node *other_node;
if (state->state & (EXTENT_IOBITS | EXTENT_BOUNDARY))
if (state->state & (EXTENT_LOCKED | EXTENT_BOUNDARY))
return;
other_node = rb_prev(&state->rb_node);
@ -611,6 +658,7 @@ int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
int clear = 0;
btrfs_debug_check_extent_io_range(tree, start, end);
trace_btrfs_clear_extent_bit(tree, start, end - start + 1, bits);
if (bits & EXTENT_DELALLOC)
bits |= EXTENT_NORESERVE;
@ -618,7 +666,7 @@ int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
if (delete)
bits |= ~EXTENT_CTLBITS;
if (bits & (EXTENT_IOBITS | EXTENT_BOUNDARY))
if (bits & (EXTENT_LOCKED | EXTENT_BOUNDARY))
clear = 1;
again:
if (!prealloc && gfpflags_allow_blocking(mask)) {
@ -850,7 +898,7 @@ static void cache_state(struct extent_state *state,
struct extent_state **cached_ptr)
{
return cache_state_if_flags(state, cached_ptr,
EXTENT_IOBITS | EXTENT_BOUNDARY);
EXTENT_LOCKED | EXTENT_BOUNDARY);
}
/*
@ -880,6 +928,7 @@ __set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
u64 last_end;
btrfs_debug_check_extent_io_range(tree, start, end);
trace_btrfs_set_extent_bit(tree, start, end - start + 1, bits);
again:
if (!prealloc && gfpflags_allow_blocking(mask)) {
@ -1112,6 +1161,8 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
bool first_iteration = true;
btrfs_debug_check_extent_io_range(tree, start, end);
trace_btrfs_convert_extent_bit(tree, start, end - start + 1, bits,
clear_bits);
again:
if (!prealloc) {
@ -1311,6 +1362,13 @@ int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
changeset);
}
int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits)
{
return __set_extent_bit(tree, start, end, bits, 0, NULL, NULL,
GFP_NOWAIT, NULL);
}
int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, int wake, int delete,
struct extent_state **cached)
@ -1478,6 +1536,79 @@ out:
return ret;
}
/**
* find_first_clear_extent_bit - finds the first range that has @bits not set
* and that starts after @start
*
* @tree - the tree to search
* @start - the offset at/after which the found extent should start
* @start_ret - records the beginning of the range
* @end_ret - records the end of the range (inclusive)
* @bits - the set of bits which must be unset
*
* Since unallocated range is also considered one which doesn't have the bits
* set it's possible that @end_ret contains -1, this happens in case the range
* spans (last_range_end, end of device]. In this case it's up to the caller to
* trim @end_ret to the appropriate size.
*/
void find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start,
u64 *start_ret, u64 *end_ret, unsigned bits)
{
struct extent_state *state;
struct rb_node *node, *prev = NULL, *next;
spin_lock(&tree->lock);
/* Find first extent with bits cleared */
while (1) {
node = __etree_search(tree, start, &next, &prev, NULL, NULL);
if (!node) {
node = next;
if (!node) {
/*
* We are past the last allocated chunk,
* set start at the end of the last extent. The
* device alloc tree should never be empty so
* prev is always set.
*/
ASSERT(prev);
state = rb_entry(prev, struct extent_state, rb_node);
*start_ret = state->end + 1;
*end_ret = -1;
goto out;
}
}
state = rb_entry(node, struct extent_state, rb_node);
if (in_range(start, state->start, state->end - state->start + 1) &&
(state->state & bits)) {
start = state->end + 1;
} else {
*start_ret = start;
break;
}
}
/*
* Find the longest stretch from start until an entry which has the
* bits set
*/
while (1) {
state = rb_entry(node, struct extent_state, rb_node);
if (state->end >= start && !(state->state & bits)) {
*end_ret = state->end;
} else {
*end_ret = state->start - 1;
break;
}
node = rb_next(node);
if (!node)
break;
}
out:
spin_unlock(&tree->lock);
}
/*
* find a contiguous range of bytes in the file marked as delalloc, not
* more than 'max_bytes'. start and end are used to return the range,
@ -2061,9 +2192,9 @@ int repair_io_failure(struct btrfs_fs_info *fs_info, u64 ino, u64 start,
return 0;
}
int repair_eb_io_failure(struct btrfs_fs_info *fs_info,
struct extent_buffer *eb, int mirror_num)
int btrfs_repair_eb_io_failure(struct extent_buffer *eb, int mirror_num)
{
struct btrfs_fs_info *fs_info = eb->fs_info;
u64 start = eb->start;
int i, num_pages = num_extent_pages(eb);
int ret = 0;
@ -2409,7 +2540,7 @@ static int bio_readpage_error(struct bio *failed_bio, u64 phy_offset,
read_mode, failrec->this_mirror, failrec->in_validation);
status = tree->ops->submit_bio_hook(tree->private_data, bio, failrec->this_mirror,
failrec->bio_flags, 0);
failrec->bio_flags);
if (status) {
free_io_failure(failure_tree, tree, failrec);
bio_put(bio);
@ -2607,8 +2738,6 @@ static void end_bio_extent_readpage(struct bio *bio)
if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD,
&eb->bflags))
btree_readahead_hook(eb, -EIO);
ret = -EIO;
}
readpage_ok:
if (likely(uptodate)) {
@ -3069,7 +3198,7 @@ out:
return ret;
}
static inline void __do_contiguous_readpages(struct extent_io_tree *tree,
static inline void contiguous_readpages(struct extent_io_tree *tree,
struct page *pages[], int nr_pages,
u64 start, u64 end,
struct extent_map **em_cached,
@ -3100,46 +3229,6 @@ static inline void __do_contiguous_readpages(struct extent_io_tree *tree,
}
}
static void __extent_readpages(struct extent_io_tree *tree,
struct page *pages[],
int nr_pages,
struct extent_map **em_cached,
struct bio **bio, unsigned long *bio_flags,
u64 *prev_em_start)
{
u64 start = 0;
u64 end = 0;
u64 page_start;
int index;
int first_index = 0;
for (index = 0; index < nr_pages; index++) {
page_start = page_offset(pages[index]);
if (!end) {
start = page_start;
end = start + PAGE_SIZE - 1;
first_index = index;
} else if (end + 1 == page_start) {
end += PAGE_SIZE;
} else {
__do_contiguous_readpages(tree, &pages[first_index],
index - first_index, start,
end, em_cached,
bio, bio_flags,
prev_em_start);
start = page_start;
end = start + PAGE_SIZE - 1;
first_index = index;
}
}
if (end)
__do_contiguous_readpages(tree, &pages[first_index],
index - first_index, start,
end, em_cached, bio,
bio_flags, prev_em_start);
}
static int __extent_read_full_page(struct extent_io_tree *tree,
struct page *page,
get_extent_t *get_extent,
@ -3419,6 +3508,9 @@ done:
* records are inserted to lock ranges in the tree, and as dirty areas
* are found, they are marked writeback. Then the lock bits are removed
* and the end_io handler clears the writeback ranges
*
* Return 0 if everything goes well.
* Return <0 for error.
*/
static int __extent_writepage(struct page *page, struct writeback_control *wbc,
struct extent_page_data *epd)
@ -3488,6 +3580,7 @@ done:
end_extent_writepage(page, ret, start, page_end);
}
unlock_page(page);
ASSERT(ret <= 0);
return ret;
done_unlocked:
@ -3500,18 +3593,26 @@ void wait_on_extent_buffer_writeback(struct extent_buffer *eb)
TASK_UNINTERRUPTIBLE);
}
static noinline_for_stack int
lock_extent_buffer_for_io(struct extent_buffer *eb,
struct btrfs_fs_info *fs_info,
/*
* Lock eb pages and flush the bio if we can't the locks
*
* Return 0 if nothing went wrong
* Return >0 is same as 0, except bio is not submitted
* Return <0 if something went wrong, no page is locked
*/
static noinline_for_stack int lock_extent_buffer_for_io(struct extent_buffer *eb,
struct extent_page_data *epd)
{
int i, num_pages;
struct btrfs_fs_info *fs_info = eb->fs_info;
int i, num_pages, failed_page_nr;
int flush = 0;
int ret = 0;
if (!btrfs_try_tree_write_lock(eb)) {
ret = flush_write_bio(epd);
if (ret < 0)
return ret;
flush = 1;
flush_write_bio(epd);
btrfs_tree_lock(eb);
}
@ -3520,7 +3621,9 @@ lock_extent_buffer_for_io(struct extent_buffer *eb,
if (!epd->sync_io)
return 0;
if (!flush) {
flush_write_bio(epd);
ret = flush_write_bio(epd);
if (ret < 0)
return ret;
flush = 1;
}
while (1) {
@ -3561,7 +3664,11 @@ lock_extent_buffer_for_io(struct extent_buffer *eb,
if (!trylock_page(p)) {
if (!flush) {
flush_write_bio(epd);
ret = flush_write_bio(epd);
if (ret < 0) {
failed_page_nr = i;
goto err_unlock;
}
flush = 1;
}
lock_page(p);
@ -3569,6 +3676,11 @@ lock_extent_buffer_for_io(struct extent_buffer *eb,
}
return ret;
err_unlock:
/* Unlock already locked pages */
for (i = 0; i < failed_page_nr; i++)
unlock_page(eb->pages[i]);
return ret;
}
static void end_extent_buffer_writeback(struct extent_buffer *eb)
@ -3672,10 +3784,10 @@ static void end_bio_extent_buffer_writepage(struct bio *bio)
}
static noinline_for_stack int write_one_eb(struct extent_buffer *eb,
struct btrfs_fs_info *fs_info,
struct writeback_control *wbc,
struct extent_page_data *epd)
{
struct btrfs_fs_info *fs_info = eb->fs_info;
struct block_device *bdev = fs_info->fs_devices->latest_bdev;
struct extent_io_tree *tree = &BTRFS_I(fs_info->btree_inode)->io_tree;
u64 offset = eb->start;
@ -3701,7 +3813,7 @@ static noinline_for_stack int write_one_eb(struct extent_buffer *eb,
* header 0 1 2 .. N ... data_N .. data_2 data_1 data_0
*/
start = btrfs_item_nr_offset(nritems);
end = BTRFS_LEAF_DATA_OFFSET + leaf_data_end(fs_info, eb);
end = BTRFS_LEAF_DATA_OFFSET + leaf_data_end(eb);
memzero_extent_buffer(eb, start, end - start);
}
@ -3744,7 +3856,6 @@ int btree_write_cache_pages(struct address_space *mapping,
struct writeback_control *wbc)
{
struct extent_io_tree *tree = &BTRFS_I(mapping->host)->io_tree;
struct btrfs_fs_info *fs_info = BTRFS_I(mapping->host)->root->fs_info;
struct extent_buffer *eb, *prev_eb = NULL;
struct extent_page_data epd = {
.bio = NULL,
@ -3819,13 +3930,13 @@ retry:
continue;
prev_eb = eb;
ret = lock_extent_buffer_for_io(eb, fs_info, &epd);
ret = lock_extent_buffer_for_io(eb, &epd);
if (!ret) {
free_extent_buffer(eb);
continue;
}
ret = write_one_eb(eb, fs_info, wbc, &epd);
ret = write_one_eb(eb, wbc, &epd);
if (ret) {
done = 1;
free_extent_buffer(eb);
@ -3852,7 +3963,12 @@ retry:
index = 0;
goto retry;
}
flush_write_bio(&epd);
ASSERT(ret <= 0);
if (ret < 0) {
end_write_bio(&epd, ret);
return ret;
}
ret = flush_write_bio(&epd);
return ret;
}
@ -3949,7 +4065,8 @@ retry:
* tmpfs file mapping
*/
if (!trylock_page(page)) {
flush_write_bio(epd);
ret = flush_write_bio(epd);
BUG_ON(ret < 0);
lock_page(page);
}
@ -3959,8 +4076,10 @@ retry:
}
if (wbc->sync_mode != WB_SYNC_NONE) {
if (PageWriteback(page))
flush_write_bio(epd);
if (PageWriteback(page)) {
ret = flush_write_bio(epd);
BUG_ON(ret < 0);
}
wait_on_page_writeback(page);
}
@ -3971,11 +4090,6 @@ retry:
}
ret = __extent_writepage(page, wbc, epd);
if (unlikely(ret == AOP_WRITEPAGE_ACTIVATE)) {
unlock_page(page);
ret = 0;
}
if (ret < 0) {
/*
* done_index is set past this page,
@ -4029,8 +4143,14 @@ int extent_write_full_page(struct page *page, struct writeback_control *wbc)
};
ret = __extent_writepage(page, wbc, &epd);
ASSERT(ret <= 0);
if (ret < 0) {
end_write_bio(&epd, ret);
return ret;
}
flush_write_bio(&epd);
ret = flush_write_bio(&epd);
ASSERT(ret <= 0);
return ret;
}
@ -4070,7 +4190,12 @@ int extent_write_locked_range(struct inode *inode, u64 start, u64 end,
start += PAGE_SIZE;
}
flush_write_bio(&epd);
ASSERT(ret <= 0);
if (ret < 0) {
end_write_bio(&epd, ret);
return ret;
}
ret = flush_write_bio(&epd);
return ret;
}
@ -4086,7 +4211,12 @@ int extent_writepages(struct address_space *mapping,
};
ret = extent_write_cache_pages(mapping, wbc, &epd);
flush_write_bio(&epd);
ASSERT(ret <= 0);
if (ret < 0) {
end_write_bio(&epd, ret);
return ret;
}
ret = flush_write_bio(&epd);
return ret;
}
@ -4102,6 +4232,8 @@ int extent_readpages(struct address_space *mapping, struct list_head *pages,
u64 prev_em_start = (u64)-1;
while (!list_empty(pages)) {
u64 contig_end = 0;
for (nr = 0; nr < ARRAY_SIZE(pagepool) && !list_empty(pages);) {
struct page *page = lru_to_page(pages);
@ -4110,14 +4242,22 @@ int extent_readpages(struct address_space *mapping, struct list_head *pages,
if (add_to_page_cache_lru(page, mapping, page->index,
readahead_gfp_mask(mapping))) {
put_page(page);
continue;
break;
}
pagepool[nr++] = page;
contig_end = page_offset(page) + PAGE_SIZE - 1;
}
__extent_readpages(tree, pagepool, nr, &em_cached, &bio,
&bio_flags, &prev_em_start);
if (nr) {
u64 contig_start = page_offset(pagepool[0]);
ASSERT(contig_start + nr * PAGE_SIZE - 1 == contig_end);
contiguous_readpages(tree, pagepool, nr, contig_start,
contig_end, &em_cached, &bio, &bio_flags,
&prev_em_start);
}
}
if (em_cached)
@ -4166,10 +4306,9 @@ static int try_release_extent_state(struct extent_io_tree *tree,
u64 end = start + PAGE_SIZE - 1;
int ret = 1;
if (test_range_bit(tree, start, end,
EXTENT_IOBITS, 0, NULL))
if (test_range_bit(tree, start, end, EXTENT_LOCKED, 0, NULL)) {
ret = 0;
else {
} else {
/*
* at this point we can safely clear everything except the
* locked bit and the nodatasum bit
@ -4222,8 +4361,7 @@ int try_release_extent_mapping(struct page *page, gfp_t mask)
}
if (!test_range_bit(tree, em->start,
extent_map_end(em) - 1,
EXTENT_LOCKED | EXTENT_WRITEBACK,
0, NULL)) {
EXTENT_LOCKED, 0, NULL)) {
set_bit(BTRFS_INODE_NEEDS_FULL_SYNC,
&btrfs_inode->runtime_flags);
remove_extent_mapping(map, em);
@ -4372,8 +4510,7 @@ try_submit_last:
* In this case, the first extent range will be cached but not emitted.
* So we must emit it before ending extent_fiemap().
*/
static int emit_last_fiemap_cache(struct btrfs_fs_info *fs_info,
struct fiemap_extent_info *fieinfo,
static int emit_last_fiemap_cache(struct fiemap_extent_info *fieinfo,
struct fiemap_cache *cache)
{
int ret;
@ -4580,7 +4717,7 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
}
out_free:
if (!ret)
ret = emit_last_fiemap_cache(root->fs_info, fieinfo, &cache);
ret = emit_last_fiemap_cache(fieinfo, &cache);
free_extent_map(em);
out:
btrfs_free_path(path);
@ -4672,13 +4809,9 @@ __alloc_extent_buffer(struct btrfs_fs_info *fs_info, u64 start,
eb->fs_info = fs_info;
eb->bflags = 0;
rwlock_init(&eb->lock);
atomic_set(&eb->write_locks, 0);
atomic_set(&eb->read_locks, 0);
atomic_set(&eb->blocking_readers, 0);
atomic_set(&eb->blocking_writers, 0);
atomic_set(&eb->spinning_readers, 0);
atomic_set(&eb->spinning_writers, 0);
eb->lock_nested = 0;
eb->lock_nested = false;
init_waitqueue_head(&eb->write_lock_wq);
init_waitqueue_head(&eb->read_lock_wq);
@ -4695,6 +4828,13 @@ __alloc_extent_buffer(struct btrfs_fs_info *fs_info, u64 start,
> MAX_INLINE_EXTENT_BUFFER_SIZE);
BUG_ON(len > MAX_INLINE_EXTENT_BUFFER_SIZE);
#ifdef CONFIG_BTRFS_DEBUG
atomic_set(&eb->spinning_writers, 0);
atomic_set(&eb->spinning_readers, 0);
atomic_set(&eb->read_locks, 0);
atomic_set(&eb->write_locks, 0);
#endif
return eb;
}
@ -5183,8 +5323,7 @@ void set_extent_buffer_uptodate(struct extent_buffer *eb)
}
}
int read_extent_buffer_pages(struct extent_io_tree *tree,
struct extent_buffer *eb, int wait, int mirror_num)
int read_extent_buffer_pages(struct extent_buffer *eb, int wait, int mirror_num)
{
int i;
struct page *page;
@ -5196,6 +5335,7 @@ int read_extent_buffer_pages(struct extent_io_tree *tree,
unsigned long num_reads = 0;
struct bio *bio = NULL;
unsigned long bio_flags = 0;
struct extent_io_tree *tree = &BTRFS_I(eb->fs_info->btree_inode)->io_tree;
if (test_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags))
return 0;
@ -5746,13 +5886,13 @@ void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
btrfs_err(fs_info,
"memmove bogus src_offset %lu move len %lu dst len %lu",
src_offset, len, dst->len);
BUG_ON(1);
BUG();
}
if (dst_offset + len > dst->len) {
btrfs_err(fs_info,
"memmove bogus dst_offset %lu move len %lu dst len %lu",
dst_offset, len, dst->len);
BUG_ON(1);
BUG();
}
while (len > 0) {
@ -5793,13 +5933,13 @@ void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
btrfs_err(fs_info,
"memmove bogus src_offset %lu move len %lu len %lu",
src_offset, len, dst->len);
BUG_ON(1);
BUG();
}
if (dst_offset + len > dst->len) {
btrfs_err(fs_info,
"memmove bogus dst_offset %lu move len %lu len %lu",
dst_offset, len, dst->len);
BUG_ON(1);
BUG();
}
if (dst_offset < src_offset) {
memcpy_extent_buffer(dst, dst_offset, src_offset, len);

89
fs/btrfs/extent_io.h
View file

@ -9,26 +9,33 @@
/* bits for the extent state */
#define EXTENT_DIRTY (1U << 0)
#define EXTENT_WRITEBACK (1U << 1)
#define EXTENT_UPTODATE (1U << 2)
#define EXTENT_LOCKED (1U << 3)
#define EXTENT_NEW (1U << 4)
#define EXTENT_DELALLOC (1U << 5)
#define EXTENT_DEFRAG (1U << 6)
#define EXTENT_BOUNDARY (1U << 9)
#define EXTENT_NODATASUM (1U << 10)
#define EXTENT_CLEAR_META_RESV (1U << 11)
#define EXTENT_NEED_WAIT (1U << 12)
#define EXTENT_DAMAGED (1U << 13)
#define EXTENT_NORESERVE (1U << 14)
#define EXTENT_QGROUP_RESERVED (1U << 15)
#define EXTENT_CLEAR_DATA_RESV (1U << 16)
#define EXTENT_DELALLOC_NEW (1U << 17)
#define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK)
#define EXTENT_UPTODATE (1U << 1)
#define EXTENT_LOCKED (1U << 2)
#define EXTENT_NEW (1U << 3)
#define EXTENT_DELALLOC (1U << 4)
#define EXTENT_DEFRAG (1U << 5)
#define EXTENT_BOUNDARY (1U << 6)
#define EXTENT_NODATASUM (1U << 7)
#define EXTENT_CLEAR_META_RESV (1U << 8)
#define EXTENT_NEED_WAIT (1U << 9)
#define EXTENT_DAMAGED (1U << 10)
#define EXTENT_NORESERVE (1U << 11)
#define EXTENT_QGROUP_RESERVED (1U << 12)
#define EXTENT_CLEAR_DATA_RESV (1U << 13)
#define EXTENT_DELALLOC_NEW (1U << 14)
#define EXTENT_DO_ACCOUNTING (EXTENT_CLEAR_META_RESV | \
EXTENT_CLEAR_DATA_RESV)
#define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING)
/*
* Redefined bits above which are used only in the device allocation tree,
* shouldn't be using EXTENT_LOCKED / EXTENT_BOUNDARY / EXTENT_CLEAR_META_RESV
* / EXTENT_CLEAR_DATA_RESV because they have special meaning to the bit
* manipulation functions
*/
#define CHUNK_ALLOCATED EXTENT_DIRTY
#define CHUNK_TRIMMED EXTENT_DEFRAG
/*
* flags for bio submission. The high bits indicate the compression
* type for this bio
@ -88,9 +95,6 @@ struct btrfs_inode;
struct btrfs_io_bio;
struct io_failure_record;
typedef blk_status_t (extent_submit_bio_hook_t)(void *private_data, struct bio *bio,
int mirror_num, unsigned long bio_flags,
u64 bio_offset);
typedef blk_status_t (extent_submit_bio_start_t)(void *private_data,
struct bio *bio, u64 bio_offset);
@ -100,17 +104,34 @@ struct extent_io_ops {
* The following callbacks must be always defined, the function
* pointer will be called unconditionally.
*/
extent_submit_bio_hook_t *submit_bio_hook;
blk_status_t (*submit_bio_hook)(struct inode *inode, struct bio *bio,
int mirror_num, unsigned long bio_flags);
int (*readpage_end_io_hook)(struct btrfs_io_bio *io_bio, u64 phy_offset,
struct page *page, u64 start, u64 end,
int mirror);
};
enum {
IO_TREE_FS_INFO_FREED_EXTENTS0,
IO_TREE_FS_INFO_FREED_EXTENTS1,
IO_TREE_INODE_IO,
IO_TREE_INODE_IO_FAILURE,
IO_TREE_RELOC_BLOCKS,
IO_TREE_TRANS_DIRTY_PAGES,
IO_TREE_ROOT_DIRTY_LOG_PAGES,
IO_TREE_SELFTEST,
};
struct extent_io_tree {
struct rb_root state;
struct btrfs_fs_info *fs_info;
void *private_data;
u64 dirty_bytes;
int track_uptodate;
bool track_uptodate;
/* Who owns this io tree, should be one of IO_TREE_* */
u8 owner;
spinlock_t lock;
const struct extent_io_ops *ops;
};
@ -146,14 +167,9 @@ struct extent_buffer {
struct rcu_head rcu_head;
pid_t lock_owner;
/* count of read lock holders on the extent buffer */
atomic_t write_locks;
atomic_t read_locks;
atomic_t blocking_writers;
atomic_t blocking_readers;
atomic_t spinning_readers;
atomic_t spinning_writers;
short lock_nested;
bool lock_nested;
/* >= 0 if eb belongs to a log tree, -1 otherwise */
short log_index;
@ -171,6 +187,10 @@ struct extent_buffer {
wait_queue_head_t read_lock_wq;
struct page *pages[INLINE_EXTENT_BUFFER_PAGES];
#ifdef CONFIG_BTRFS_DEBUG
atomic_t spinning_writers;
atomic_t spinning_readers;
atomic_t read_locks;
atomic_t write_locks;
struct list_head leak_list;
#endif
};
@ -239,7 +259,10 @@ typedef struct extent_map *(get_extent_t)(struct btrfs_inode *inode,
u64 start, u64 len,
int create);
void extent_io_tree_init(struct extent_io_tree *tree, void *private_data);
void extent_io_tree_init(struct btrfs_fs_info *fs_info,
struct extent_io_tree *tree, unsigned int owner,
void *private_data);
void extent_io_tree_release(struct extent_io_tree *tree);
int try_release_extent_mapping(struct page *page, gfp_t mask);
int try_release_extent_buffer(struct page *page);
int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
@ -309,6 +332,8 @@ int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits, u64 *failed_start,
struct extent_state **cached_state, gfp_t mask);
int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start, u64 end,
unsigned bits);
static inline int set_extent_bits(struct extent_io_tree *tree, u64 start,
u64 end, unsigned bits)
@ -376,6 +401,8 @@ static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start,
int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
u64 *start_ret, u64 *end_ret, unsigned bits,
struct extent_state **cached_state);
void find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start,
u64 *start_ret, u64 *end_ret, unsigned bits);
int extent_invalidatepage(struct extent_io_tree *tree,
struct page *page, unsigned long offset);
int extent_write_full_page(struct page *page, struct writeback_control *wbc);
@ -405,8 +432,7 @@ void free_extent_buffer_stale(struct extent_buffer *eb);
#define WAIT_NONE 0
#define WAIT_COMPLETE 1
#define WAIT_PAGE_LOCK 2
int read_extent_buffer_pages(struct extent_io_tree *tree,
struct extent_buffer *eb, int wait,
int read_extent_buffer_pages(struct extent_buffer *eb, int wait,
int mirror_num);
void wait_on_extent_buffer_writeback(struct extent_buffer *eb);
@ -487,8 +513,7 @@ int clean_io_failure(struct btrfs_fs_info *fs_info,
struct extent_io_tree *io_tree, u64 start,
struct page *page, u64 ino, unsigned int pg_offset);
void end_extent_writepage(struct page *page, int err, u64 start, u64 end);
int repair_eb_io_failure(struct btrfs_fs_info *fs_info,
struct extent_buffer *eb, int mirror_num);
int btrfs_repair_eb_io_failure(struct extent_buffer *eb, int mirror_num);
/*
* When IO fails, either with EIO or csum verification fails, we

38
fs/btrfs/extent_map.c
View file

@ -4,6 +4,7 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
#include "ctree.h"
#include "volumes.h"
#include "extent_map.h"
#include "compression.h"
@ -337,6 +338,37 @@ static inline void setup_extent_mapping(struct extent_map_tree *tree,
try_merge_map(tree, em);
}
static void extent_map_device_set_bits(struct extent_map *em, unsigned bits)
{
struct map_lookup *map = em->map_lookup;
u64 stripe_size = em->orig_block_len;
int i;
for (i = 0; i < map->num_stripes; i++) {
struct btrfs_bio_stripe *stripe = &map->stripes[i];
struct btrfs_device *device = stripe->dev;
set_extent_bits_nowait(&device->alloc_state, stripe->physical,
stripe->physical + stripe_size - 1, bits);
}
}
static void extent_map_device_clear_bits(struct extent_map *em, unsigned bits)
{
struct map_lookup *map = em->map_lookup;
u64 stripe_size = em->orig_block_len;
int i;
for (i = 0; i < map->num_stripes; i++) {
struct btrfs_bio_stripe *stripe = &map->stripes[i];
struct btrfs_device *device = stripe->dev;
__clear_extent_bit(&device->alloc_state, stripe->physical,
stripe->physical + stripe_size - 1, bits,
0, 0, NULL, GFP_NOWAIT, NULL);
}
}
/**
* add_extent_mapping - add new extent map to the extent tree
* @tree: tree to insert new map in
@ -357,6 +389,10 @@ int add_extent_mapping(struct extent_map_tree *tree,
goto out;
setup_extent_mapping(tree, em, modified);
if (test_bit(EXTENT_FLAG_FS_MAPPING, &em->flags)) {
extent_map_device_set_bits(em, CHUNK_ALLOCATED);
extent_map_device_clear_bits(em, CHUNK_TRIMMED);
}
out:
return ret;
}
@ -438,6 +474,8 @@ void remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em)
rb_erase_cached(&em->rb_node, &tree->map);
if (!test_bit(EXTENT_FLAG_LOGGING, &em->flags))
list_del_init(&em->list);
if (test_bit(EXTENT_FLAG_FS_MAPPING, &em->flags))
extent_map_device_clear_bits(em, CHUNK_ALLOCATED);
RB_CLEAR_NODE(&em->rb_node);
}

32
fs/btrfs/file-item.c
View file

@ -413,6 +413,16 @@ fail:
return ret;
}
/*
* btrfs_csum_one_bio - Calculates checksums of the data contained inside a bio
* @inode: Owner of the data inside the bio
* @bio: Contains the data to be checksummed
* @file_start: offset in file this bio begins to describe
* @contig: Boolean. If true/1 means all bio vecs in this bio are
* contiguous and they begin at @file_start in the file. False/0
* means this bio can contains potentially discontigous bio vecs
* so the logical offset of each should be calculated separately.
*/
blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
u64 file_start, int contig)
{
@ -458,8 +468,6 @@ blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
BUG_ON(!ordered); /* Logic error */
}
data = kmap_atomic(bvec.bv_page);
nr_sectors = BTRFS_BYTES_TO_BLKS(fs_info,
bvec.bv_len + fs_info->sectorsize
- 1);
@ -469,10 +477,9 @@ blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
offset < ordered->file_offset) {
unsigned long bytes_left;
kunmap_atomic(data);
sums->len = this_sum_bytes;
this_sum_bytes = 0;
btrfs_add_ordered_sum(inode, ordered, sums);
btrfs_add_ordered_sum(ordered, sums);
btrfs_put_ordered_extent(ordered);
bytes_left = bio->bi_iter.bi_size - total_bytes;
@ -489,16 +496,16 @@ blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
sums->bytenr = ((u64)bio->bi_iter.bi_sector << 9)
+ total_bytes;
index = 0;
data = kmap_atomic(bvec.bv_page);
}
sums->sums[index] = ~(u32)0;
data = kmap_atomic(bvec.bv_page);
sums->sums[index]
= btrfs_csum_data(data + bvec.bv_offset
+ (i * fs_info->sectorsize),
sums->sums[index],
fs_info->sectorsize);
kunmap_atomic(data);
btrfs_csum_final(sums->sums[index],
(char *)(sums->sums + index));
index++;
@ -507,10 +514,9 @@ blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
total_bytes += fs_info->sectorsize;
}
kunmap_atomic(data);
}
this_sum_bytes = 0;
btrfs_add_ordered_sum(inode, ordered, sums);
btrfs_add_ordered_sum(ordered, sums);
btrfs_put_ordered_extent(ordered);
return 0;
}
@ -551,7 +557,7 @@ static noinline void truncate_one_csum(struct btrfs_fs_info *fs_info,
*/
u32 new_size = (bytenr - key->offset) >> blocksize_bits;
new_size *= csum_size;
btrfs_truncate_item(fs_info, path, new_size, 1);
btrfs_truncate_item(path, new_size, 1);
} else if (key->offset >= bytenr && csum_end > end_byte &&
end_byte > key->offset) {
/*
@ -563,7 +569,7 @@ static noinline void truncate_one_csum(struct btrfs_fs_info *fs_info,
u32 new_size = (csum_end - end_byte) >> blocksize_bits;
new_size *= csum_size;
btrfs_truncate_item(fs_info, path, new_size, 0);
btrfs_truncate_item(path, new_size, 0);
key->offset = end_byte;
btrfs_set_item_key_safe(fs_info, path, key);
@ -832,11 +838,11 @@ again:
u32 diff;
u32 free_space;
if (btrfs_leaf_free_space(fs_info, leaf) <
if (btrfs_leaf_free_space(leaf) <
sizeof(struct btrfs_item) + csum_size * 2)
goto insert;
free_space = btrfs_leaf_free_space(fs_info, leaf) -
free_space = btrfs_leaf_free_space(leaf) -
sizeof(struct btrfs_item) - csum_size;
tmp = sums->len - total_bytes;
tmp >>= fs_info->sb->s_blocksize_bits;
@ -852,7 +858,7 @@ again:
diff /= csum_size;
diff *= csum_size;
btrfs_extend_item(fs_info, path, diff);
btrfs_extend_item(path, diff);
ret = 0;
goto csum;
}

47
fs/btrfs/file.c
View file

@ -754,6 +754,7 @@ int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info = root->fs_info;
struct extent_buffer *leaf;
struct btrfs_file_extent_item *fi;
struct btrfs_ref ref = { 0 };
struct btrfs_key key;
struct btrfs_key new_key;
u64 ino = btrfs_ino(BTRFS_I(inode));
@ -909,11 +910,14 @@ next_slot:
btrfs_mark_buffer_dirty(leaf);
if (update_refs && disk_bytenr > 0) {
ret = btrfs_inc_extent_ref(trans, root,
disk_bytenr, num_bytes, 0,
btrfs_init_generic_ref(&ref,
BTRFS_ADD_DELAYED_REF,
disk_bytenr, num_bytes, 0);
btrfs_init_data_ref(&ref,
root->root_key.objectid,
new_key.objectid,
start - extent_offset);
ret = btrfs_inc_extent_ref(trans, &ref);
BUG_ON(ret); /* -ENOMEM */
}
key.offset = start;
@ -993,11 +997,14 @@ delete_extent_item:
extent_end = ALIGN(extent_end,
fs_info->sectorsize);
} else if (update_refs && disk_bytenr > 0) {
ret = btrfs_free_extent(trans, root,
disk_bytenr, num_bytes, 0,
btrfs_init_generic_ref(&ref,
BTRFS_DROP_DELAYED_REF,
disk_bytenr, num_bytes, 0);
btrfs_init_data_ref(&ref,
root->root_key.objectid,
key.objectid, key.offset -
extent_offset);
key.objectid,
key.offset - extent_offset);
ret = btrfs_free_extent(trans, &ref);
BUG_ON(ret); /* -ENOMEM */
inode_sub_bytes(inode,
extent_end - key.offset);
@ -1025,7 +1032,7 @@ delete_extent_item:
continue;
}
BUG_ON(1);
BUG();
}
if (!ret && del_nr > 0) {
@ -1050,7 +1057,7 @@ delete_extent_item:
if (!ret && replace_extent && leafs_visited == 1 &&
(path->locks[0] == BTRFS_WRITE_LOCK_BLOCKING ||
path->locks[0] == BTRFS_WRITE_LOCK) &&
btrfs_leaf_free_space(fs_info, leaf) >=
btrfs_leaf_free_space(leaf) >=
sizeof(struct btrfs_item) + extent_item_size) {
key.objectid = ino;
@ -1142,6 +1149,7 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
struct extent_buffer *leaf;
struct btrfs_path *path;
struct btrfs_file_extent_item *fi;
struct btrfs_ref ref = { 0 };
struct btrfs_key key;
struct btrfs_key new_key;
u64 bytenr;
@ -1287,9 +1295,11 @@ again:
extent_end - split);
btrfs_mark_buffer_dirty(leaf);
ret = btrfs_inc_extent_ref(trans, root, bytenr, num_bytes,
0, root->root_key.objectid,
ino, orig_offset);
btrfs_init_generic_ref(&ref, BTRFS_ADD_DELAYED_REF, bytenr,
num_bytes, 0);
btrfs_init_data_ref(&ref, root->root_key.objectid, ino,
orig_offset);
ret = btrfs_inc_extent_ref(trans, &ref);
if (ret) {
btrfs_abort_transaction(trans, ret);
goto out;
@ -1311,6 +1321,9 @@ again:
other_start = end;
other_end = 0;
btrfs_init_generic_ref(&ref, BTRFS_DROP_DELAYED_REF, bytenr,
num_bytes, 0);
btrfs_init_data_ref(&ref, root->root_key.objectid, ino, orig_offset);
if (extent_mergeable(leaf, path->slots[0] + 1,
ino, bytenr, orig_offset,
&other_start, &other_end)) {
@ -1321,9 +1334,7 @@ again:
extent_end = other_end;
del_slot = path->slots[0] + 1;
del_nr++;
ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
0, root->root_key.objectid,
ino, orig_offset);
ret = btrfs_free_extent(trans, &ref);
if (ret) {
btrfs_abort_transaction(trans, ret);
goto out;
@ -1341,9 +1352,7 @@ again:
key.offset = other_start;
del_slot = path->slots[0];
del_nr++;
ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
0, root->root_key.objectid,
ino, orig_offset);
ret = btrfs_free_extent(trans, &ref);
if (ret) {
btrfs_abort_transaction(trans, ret);
goto out;
@ -2165,7 +2174,6 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
inode_unlock(inode);
goto out;
}
trans->sync = true;
ret = btrfs_log_dentry_safe(trans, dentry, start, end, &ctx);
if (ret < 0) {
@ -3132,6 +3140,7 @@ static long btrfs_fallocate(struct file *file, int mode,
ret = btrfs_qgroup_reserve_data(inode, &data_reserved,
cur_offset, last_byte - cur_offset);
if (ret < 0) {
cur_offset = last_byte;
free_extent_map(em);
break;
}
@ -3181,7 +3190,7 @@ out:
/* Let go of our reservation. */
if (ret != 0 && !(mode & FALLOC_FL_ZERO_RANGE))
btrfs_free_reserved_data_space(inode, data_reserved,
alloc_start, alloc_end - cur_offset);
cur_offset, alloc_end - cur_offset);
extent_changeset_free(data_reserved);
return ret;
}

45
fs/btrfs/free-space-cache.c
View file

@ -88,10 +88,11 @@ static struct inode *__lookup_free_space_inode(struct btrfs_root *root,
return inode;
}
struct inode *lookup_free_space_inode(struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache
*block_group, struct btrfs_path *path)
struct inode *lookup_free_space_inode(
struct btrfs_block_group_cache *block_group,
struct btrfs_path *path)
{
struct btrfs_fs_info *fs_info = block_group->fs_info;
struct inode *inode = NULL;
u32 flags = BTRFS_INODE_NODATASUM | BTRFS_INODE_NODATACOW;
@ -185,20 +186,19 @@ static int __create_free_space_inode(struct btrfs_root *root,
return 0;
}
int create_free_space_inode(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
int create_free_space_inode(struct btrfs_trans_handle *trans,
struct btrfs_block_group_cache *block_group,
struct btrfs_path *path)
{
int ret;
u64 ino;
ret = btrfs_find_free_objectid(fs_info->tree_root, &ino);
ret = btrfs_find_free_objectid(trans->fs_info->tree_root, &ino);
if (ret < 0)
return ret;
return __create_free_space_inode(fs_info->tree_root, trans, path, ino,
block_group->key.objectid);
return __create_free_space_inode(trans->fs_info->tree_root, trans, path,
ino, block_group->key.objectid);
}
int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info,
@ -812,9 +812,9 @@ free_cache:
goto out;
}
int load_free_space_cache(struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *block_group)
int load_free_space_cache(struct btrfs_block_group_cache *block_group)
{
struct btrfs_fs_info *fs_info = block_group->fs_info;
struct btrfs_free_space_ctl *ctl = block_group->free_space_ctl;
struct inode *inode;
struct btrfs_path *path;
@ -858,7 +858,7 @@ int load_free_space_cache(struct btrfs_fs_info *fs_info,
* once created get their ->cached field set to BTRFS_CACHE_FINISHED so
* we will never try to read their inode item while the fs is mounted.
*/
inode = lookup_free_space_inode(fs_info, block_group, path);
inode = lookup_free_space_inode(block_group, path);
if (IS_ERR(inode)) {
btrfs_free_path(path);
return 0;
@ -1039,8 +1039,7 @@ fail:
return -1;
}
static noinline_for_stack int
write_pinned_extent_entries(struct btrfs_fs_info *fs_info,
static noinline_for_stack int write_pinned_extent_entries(
struct btrfs_block_group_cache *block_group,
struct btrfs_io_ctl *io_ctl,
int *entries)
@ -1059,7 +1058,7 @@ write_pinned_extent_entries(struct btrfs_fs_info *fs_info,
* We shouldn't have switched the pinned extents yet so this is the
* right one
*/
unpin = fs_info->pinned_extents;
unpin = block_group->fs_info->pinned_extents;
start = block_group->key.objectid;
@ -1235,7 +1234,6 @@ static int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
struct btrfs_io_ctl *io_ctl,
struct btrfs_trans_handle *trans)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct extent_state *cached_state = NULL;
LIST_HEAD(bitmap_list);
int entries = 0;
@ -1293,8 +1291,7 @@ static int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
* If this changes while we are working we'll get added back to
* the dirty list and redo it. No locking needed
*/
ret = write_pinned_extent_entries(fs_info, block_group,
io_ctl, &entries);
ret = write_pinned_extent_entries(block_group, io_ctl, &entries);
if (ret)
goto out_nospc_locked;
@ -1370,11 +1367,11 @@ out_unlock:
goto out;
}
int btrfs_write_out_cache(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
int btrfs_write_out_cache(struct btrfs_trans_handle *trans,
struct btrfs_block_group_cache *block_group,
struct btrfs_path *path)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
struct btrfs_free_space_ctl *ctl = block_group->free_space_ctl;
struct inode *inode;
int ret = 0;
@ -1386,7 +1383,7 @@ int btrfs_write_out_cache(struct btrfs_fs_info *fs_info,
}
spin_unlock(&block_group->lock);
inode = lookup_free_space_inode(fs_info, block_group, path);
inode = lookup_free_space_inode(block_group, path);
if (IS_ERR(inode))
return 0;
@ -3040,11 +3037,11 @@ setup_cluster_bitmap(struct btrfs_block_group_cache *block_group,
* returns zero and sets up cluster if things worked out, otherwise
* it returns -enospc
*/
int btrfs_find_space_cluster(struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *block_group,
int btrfs_find_space_cluster(struct btrfs_block_group_cache *block_group,
struct btrfs_free_cluster *cluster,
u64 offset, u64 bytes, u64 empty_size)
{
struct btrfs_fs_info *fs_info = block_group->fs_info;
struct btrfs_free_space_ctl *ctl = block_group->free_space_ctl;
struct btrfs_free_space *entry, *tmp;
LIST_HEAD(bitmaps);
@ -3366,10 +3363,6 @@ void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *block_group)
em = lookup_extent_mapping(em_tree, block_group->key.objectid,
1);
BUG_ON(!em); /* logic error, can't happen */
/*
* remove_extent_mapping() will delete us from the pinned_chunks
* list, which is protected by the chunk mutex.
*/
remove_extent_mapping(em_tree, em);
write_unlock(&em_tree->lock);
mutex_unlock(&fs_info->chunk_mutex);

18
fs/btrfs/free-space-cache.h
View file

@ -38,11 +38,10 @@ struct btrfs_free_space_op {
struct btrfs_io_ctl;
struct inode *lookup_free_space_inode(struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache
*block_group, struct btrfs_path *path);
int create_free_space_inode(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
struct inode *lookup_free_space_inode(
struct btrfs_block_group_cache *block_group,
struct btrfs_path *path);
int create_free_space_inode(struct btrfs_trans_handle *trans,
struct btrfs_block_group_cache *block_group,
struct btrfs_path *path);
@ -51,13 +50,11 @@ int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info,
int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans,
struct btrfs_block_group_cache *block_group,
struct inode *inode);
int load_free_space_cache(struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *block_group);
int load_free_space_cache(struct btrfs_block_group_cache *block_group);
int btrfs_wait_cache_io(struct btrfs_trans_handle *trans,
struct btrfs_block_group_cache *block_group,
struct btrfs_path *path);
int btrfs_write_out_cache(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
int btrfs_write_out_cache(struct btrfs_trans_handle *trans,
struct btrfs_block_group_cache *block_group,
struct btrfs_path *path);
struct inode *lookup_free_ino_inode(struct btrfs_root *root,
@ -95,8 +92,7 @@ u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
u64 bytes);
int btrfs_find_space_cluster(struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *block_group,
int btrfs_find_space_cluster(struct btrfs_block_group_cache *block_group,
struct btrfs_free_cluster *cluster,
u64 offset, u64 bytes, u64 empty_size);
void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);

24
fs/btrfs/free-space-tree.c
View file

@ -76,10 +76,11 @@ out:
EXPORT_FOR_TESTS
struct btrfs_free_space_info *search_free_space_info(
struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans,
struct btrfs_block_group_cache *block_group,
struct btrfs_path *path, int cow)
{
struct btrfs_fs_info *fs_info = block_group->fs_info;
struct btrfs_root *root = fs_info->free_space_root;
struct btrfs_key key;
int ret;
@ -253,7 +254,7 @@ int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans,
btrfs_release_path(path);
}
info = search_free_space_info(trans, fs_info, block_group, path, 1);
info = search_free_space_info(trans, block_group, path, 1);
if (IS_ERR(info)) {
ret = PTR_ERR(info);
goto out;
@ -398,7 +399,7 @@ int convert_free_space_to_extents(struct btrfs_trans_handle *trans,
btrfs_release_path(path);
}
info = search_free_space_info(trans, fs_info, block_group, path, 1);
info = search_free_space_info(trans, block_group, path, 1);
if (IS_ERR(info)) {
ret = PTR_ERR(info);
goto out;
@ -463,8 +464,7 @@ static int update_free_space_extent_count(struct btrfs_trans_handle *trans,
if (new_extents == 0)
return 0;
info = search_free_space_info(trans, trans->fs_info, block_group, path,
1);
info = search_free_space_info(trans, block_group, path, 1);
if (IS_ERR(info)) {
ret = PTR_ERR(info);
goto out;
@ -793,8 +793,7 @@ int __remove_from_free_space_tree(struct btrfs_trans_handle *trans,
return ret;
}
info = search_free_space_info(NULL, trans->fs_info, block_group, path,
0);
info = search_free_space_info(NULL, block_group, path, 0);
if (IS_ERR(info))
return PTR_ERR(info);
flags = btrfs_free_space_flags(path->nodes[0], info);
@ -977,7 +976,6 @@ int __add_to_free_space_tree(struct btrfs_trans_handle *trans,
struct btrfs_block_group_cache *block_group,
struct btrfs_path *path, u64 start, u64 size)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
struct btrfs_free_space_info *info;
u32 flags;
int ret;
@ -988,7 +986,7 @@ int __add_to_free_space_tree(struct btrfs_trans_handle *trans,
return ret;
}
info = search_free_space_info(NULL, fs_info, block_group, path, 0);
info = search_free_space_info(NULL, block_group, path, 0);
if (IS_ERR(info))
return PTR_ERR(info);
flags = btrfs_free_space_flags(path->nodes[0], info);
@ -1150,7 +1148,7 @@ int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info)
return PTR_ERR(trans);
set_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags);
free_space_root = btrfs_create_tree(trans, fs_info,
free_space_root = btrfs_create_tree(trans,
BTRFS_FREE_SPACE_TREE_OBJECTID);
if (IS_ERR(free_space_root)) {
ret = PTR_ERR(free_space_root);
@ -1248,7 +1246,7 @@ int btrfs_clear_free_space_tree(struct btrfs_fs_info *fs_info)
list_del(&free_space_root->dirty_list);
btrfs_tree_lock(free_space_root->node);
clean_tree_block(fs_info, free_space_root->node);
btrfs_clean_tree_block(free_space_root->node);
btrfs_tree_unlock(free_space_root->node);
btrfs_free_tree_block(trans, free_space_root, free_space_root->node,
0, 1);
@ -1534,14 +1532,12 @@ out:
int load_free_space_tree(struct btrfs_caching_control *caching_ctl)
{
struct btrfs_block_group_cache *block_group;
struct btrfs_fs_info *fs_info;
struct btrfs_free_space_info *info;
struct btrfs_path *path;
u32 extent_count, flags;
int ret;
block_group = caching_ctl->block_group;
fs_info = block_group->fs_info;
path = btrfs_alloc_path();
if (!path)
@ -1555,7 +1551,7 @@ int load_free_space_tree(struct btrfs_caching_control *caching_ctl)
path->search_commit_root = 1;
path->reada = READA_FORWARD;
info = search_free_space_info(NULL, fs_info, block_group, path, 0);
info = search_free_space_info(NULL, block_group, path, 0);
if (IS_ERR(info)) {
ret = PTR_ERR(info);
goto out;

1
fs/btrfs/free-space-tree.h
View file

@ -30,7 +30,6 @@ int remove_from_free_space_tree(struct btrfs_trans_handle *trans,
#ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
struct btrfs_free_space_info *
search_free_space_info(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info,
struct btrfs_block_group_cache *block_group,
struct btrfs_path *path, int cow);
int __add_to_free_space_tree(struct btrfs_trans_handle *trans,

8
fs/btrfs/inode-item.c
View file

@ -170,7 +170,7 @@ static int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
memmove_extent_buffer(leaf, ptr, ptr + del_len,
item_size - (ptr + del_len - item_start));
btrfs_truncate_item(root->fs_info, path, item_size - del_len, 1);
btrfs_truncate_item(path, item_size - del_len, 1);
out:
btrfs_free_path(path);
@ -234,7 +234,7 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
item_start = btrfs_item_ptr_offset(leaf, path->slots[0]);
memmove_extent_buffer(leaf, ptr, ptr + sub_item_len,
item_size - (ptr + sub_item_len - item_start));
btrfs_truncate_item(root->fs_info, path, item_size - sub_item_len, 1);
btrfs_truncate_item(path, item_size - sub_item_len, 1);
out:
btrfs_free_path(path);
@ -288,7 +288,7 @@ static int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
name, name_len, NULL))
goto out;
btrfs_extend_item(root->fs_info, path, ins_len);
btrfs_extend_item(path, ins_len);
ret = 0;
}
if (ret < 0)
@ -347,7 +347,7 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
goto out;
old_size = btrfs_item_size_nr(path->nodes[0], path->slots[0]);
btrfs_extend_item(fs_info, path, ins_len);
btrfs_extend_item(path, ins_len);
ref = btrfs_item_ptr(path->nodes[0], path->slots[0],
struct btrfs_inode_ref);
ref = (struct btrfs_inode_ref *)((unsigned long)ref + old_size);

327
fs/btrfs/inode.c
View file

@ -28,6 +28,7 @@
#include <linux/magic.h>
#include <linux/iversion.h>
#include <linux/swap.h>
#include <linux/sched/mm.h>
#include <asm/unaligned.h>
#include "ctree.h"
#include "disk-io.h"
@ -73,17 +74,6 @@ struct kmem_cache *btrfs_trans_handle_cachep;
struct kmem_cache *btrfs_path_cachep;
struct kmem_cache *btrfs_free_space_cachep;
#define S_SHIFT 12
static const unsigned char btrfs_type_by_mode[S_IFMT >> S_SHIFT] = {
[S_IFREG >> S_SHIFT] = BTRFS_FT_REG_FILE,
[S_IFDIR >> S_SHIFT] = BTRFS_FT_DIR,
[S_IFCHR >> S_SHIFT] = BTRFS_FT_CHRDEV,
[S_IFBLK >> S_SHIFT] = BTRFS_FT_BLKDEV,
[S_IFIFO >> S_SHIFT] = BTRFS_FT_FIFO,
[S_IFSOCK >> S_SHIFT] = BTRFS_FT_SOCK,
[S_IFLNK >> S_SHIFT] = BTRFS_FT_SYMLINK,
};
static int btrfs_setsize(struct inode *inode, struct iattr *attr);
static int btrfs_truncate(struct inode *inode, bool skip_writeback);
static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent);
@ -366,18 +356,24 @@ struct async_extent {
struct list_head list;
};
struct async_cow {
struct async_chunk {
struct inode *inode;
struct btrfs_fs_info *fs_info;
struct page *locked_page;
u64 start;
u64 end;
unsigned int write_flags;
struct list_head extents;
struct btrfs_work work;
atomic_t *pending;
};
static noinline int add_async_extent(struct async_cow *cow,
struct async_cow {
/* Number of chunks in flight; must be first in the structure */
atomic_t num_chunks;
struct async_chunk chunks[];
};
static noinline int add_async_extent(struct async_chunk *cow,
u64 start, u64 ram_size,
u64 compressed_size,
struct page **pages,
@ -444,14 +440,14 @@ static inline void inode_should_defrag(struct btrfs_inode *inode,
* are written in the same order that the flusher thread sent them
* down.
*/
static noinline void compress_file_range(struct inode *inode,
struct page *locked_page,
u64 start, u64 end,
struct async_cow *async_cow,
int *num_added)
static noinline void compress_file_range(struct async_chunk *async_chunk,
int *num_added)
{
struct inode *inode = async_chunk->inode;
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
u64 blocksize = fs_info->sectorsize;
u64 start = async_chunk->start;
u64 end = async_chunk->end;
u64 actual_end;
int ret = 0;
struct page **pages = NULL;
@ -630,7 +626,7 @@ cont:
* allocation on disk for these compressed pages, and
* will submit them to the elevator.
*/
add_async_extent(async_cow, start, total_in,
add_async_extent(async_chunk, start, total_in,
total_compressed, pages, nr_pages,
compress_type);
@ -670,14 +666,14 @@ cleanup_and_bail_uncompressed:
* to our extent and set things up for the async work queue to run
* cow_file_range to do the normal delalloc dance.
*/
if (page_offset(locked_page) >= start &&
page_offset(locked_page) <= end)
__set_page_dirty_nobuffers(locked_page);
if (page_offset(async_chunk->locked_page) >= start &&
page_offset(async_chunk->locked_page) <= end)
__set_page_dirty_nobuffers(async_chunk->locked_page);
/* unlocked later on in the async handlers */
if (redirty)
extent_range_redirty_for_io(inode, start, end);
add_async_extent(async_cow, start, end - start + 1, 0, NULL, 0,
add_async_extent(async_chunk, start, end - start + 1, 0, NULL, 0,
BTRFS_COMPRESS_NONE);
*num_added += 1;
@ -713,38 +709,34 @@ static void free_async_extent_pages(struct async_extent *async_extent)
* queued. We walk all the async extents created by compress_file_range
* and send them down to the disk.
*/
static noinline void submit_compressed_extents(struct async_cow *async_cow)
static noinline void submit_compressed_extents(struct async_chunk *async_chunk)
{
struct inode *inode = async_cow->inode;
struct inode *inode = async_chunk->inode;
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
struct async_extent *async_extent;
u64 alloc_hint = 0;
struct btrfs_key ins;
struct extent_map *em;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct extent_io_tree *io_tree;
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
int ret = 0;
again:
while (!list_empty(&async_cow->extents)) {
async_extent = list_entry(async_cow->extents.next,
while (!list_empty(&async_chunk->extents)) {
async_extent = list_entry(async_chunk->extents.next,
struct async_extent, list);
list_del(&async_extent->list);
io_tree = &BTRFS_I(inode)->io_tree;
retry:
lock_extent(io_tree, async_extent->start,
async_extent->start + async_extent->ram_size - 1);
/* did the compression code fall back to uncompressed IO? */
if (!async_extent->pages) {
int page_started = 0;
unsigned long nr_written = 0;
lock_extent(io_tree, async_extent->start,
async_extent->start +
async_extent->ram_size - 1);
/* allocate blocks */
ret = cow_file_range(inode, async_cow->locked_page,
ret = cow_file_range(inode, async_chunk->locked_page,
async_extent->start,
async_extent->start +
async_extent->ram_size - 1,
@ -768,15 +760,12 @@ retry:
async_extent->ram_size - 1,
WB_SYNC_ALL);
else if (ret)
unlock_page(async_cow->locked_page);
unlock_page(async_chunk->locked_page);
kfree(async_extent);
cond_resched();
continue;
}
lock_extent(io_tree, async_extent->start,
async_extent->start + async_extent->ram_size - 1);
ret = btrfs_reserve_extent(root, async_extent->ram_size,
async_extent->compressed_size,
async_extent->compressed_size,
@ -855,7 +844,7 @@ retry:
ins.objectid,
ins.offset, async_extent->pages,
async_extent->nr_pages,
async_cow->write_flags)) {
async_chunk->write_flags)) {
struct page *p = async_extent->pages[0];
const u64 start = async_extent->start;
const u64 end = start + async_extent->ram_size - 1;
@ -1132,16 +1121,15 @@ out_unlock:
*/
static noinline void async_cow_start(struct btrfs_work *work)
{
struct async_cow *async_cow;
struct async_chunk *async_chunk;
int num_added = 0;
async_cow = container_of(work, struct async_cow, work);
compress_file_range(async_cow->inode, async_cow->locked_page,
async_cow->start, async_cow->end, async_cow,
&num_added);
async_chunk = container_of(work, struct async_chunk, work);
compress_file_range(async_chunk, &num_added);
if (num_added == 0) {
btrfs_add_delayed_iput(async_cow->inode);
async_cow->inode = NULL;
btrfs_add_delayed_iput(async_chunk->inode);
async_chunk->inode = NULL;
}
}
@ -1150,14 +1138,12 @@ static noinline void async_cow_start(struct btrfs_work *work)
*/
static noinline void async_cow_submit(struct btrfs_work *work)
{
struct btrfs_fs_info *fs_info;
struct async_cow *async_cow;
struct async_chunk *async_chunk = container_of(work, struct async_chunk,
work);
struct btrfs_fs_info *fs_info = btrfs_work_owner(work);
unsigned long nr_pages;
async_cow = container_of(work, struct async_cow, work);
fs_info = async_cow->fs_info;
nr_pages = (async_cow->end - async_cow->start + PAGE_SIZE) >>
nr_pages = (async_chunk->end - async_chunk->start + PAGE_SIZE) >>
PAGE_SHIFT;
/* atomic_sub_return implies a barrier */
@ -1166,22 +1152,28 @@ static noinline void async_cow_submit(struct btrfs_work *work)
cond_wake_up_nomb(&fs_info->async_submit_wait);
/*
* ->inode could be NULL if async_cow_start has failed to compress,
* ->inode could be NULL if async_chunk_start has failed to compress,
* in which case we don't have anything to submit, yet we need to
* always adjust ->async_delalloc_pages as its paired with the init
* happening in cow_file_range_async
*/
if (async_cow->inode)
submit_compressed_extents(async_cow);
if (async_chunk->inode)
submit_compressed_extents(async_chunk);
}
static noinline void async_cow_free(struct btrfs_work *work)
{
struct async_cow *async_cow;
async_cow = container_of(work, struct async_cow, work);
if (async_cow->inode)
btrfs_add_delayed_iput(async_cow->inode);
kfree(async_cow);
struct async_chunk *async_chunk;
async_chunk = container_of(work, struct async_chunk, work);
if (async_chunk->inode)
btrfs_add_delayed_iput(async_chunk->inode);
/*
* Since the pointer to 'pending' is at the beginning of the array of
* async_chunk's, freeing it ensures the whole array has been freed.
*/
if (atomic_dec_and_test(async_chunk->pending))
kvfree(async_chunk->pending);
}
static int cow_file_range_async(struct inode *inode, struct page *locked_page,
@ -1190,45 +1182,73 @@ static int cow_file_range_async(struct inode *inode, struct page *locked_page,
unsigned int write_flags)
{
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
struct async_cow *async_cow;
struct async_cow *ctx;
struct async_chunk *async_chunk;
unsigned long nr_pages;
u64 cur_end;
u64 num_chunks = DIV_ROUND_UP(end - start, SZ_512K);
int i;
bool should_compress;
unsigned nofs_flag;
unlock_extent(&BTRFS_I(inode)->io_tree, start, end);
if (BTRFS_I(inode)->flags & BTRFS_INODE_NOCOMPRESS &&
!btrfs_test_opt(fs_info, FORCE_COMPRESS)) {
num_chunks = 1;
should_compress = false;
} else {
should_compress = true;
}
nofs_flag = memalloc_nofs_save();
ctx = kvmalloc(struct_size(ctx, chunks, num_chunks), GFP_KERNEL);
memalloc_nofs_restore(nofs_flag);
if (!ctx) {
unsigned clear_bits = EXTENT_LOCKED | EXTENT_DELALLOC |
EXTENT_DELALLOC_NEW | EXTENT_DEFRAG |
EXTENT_DO_ACCOUNTING;
unsigned long page_ops = PAGE_UNLOCK | PAGE_CLEAR_DIRTY |
PAGE_SET_WRITEBACK | PAGE_END_WRITEBACK |
PAGE_SET_ERROR;
extent_clear_unlock_delalloc(inode, start, end, 0, locked_page,
clear_bits, page_ops);
return -ENOMEM;
}
async_chunk = ctx->chunks;
atomic_set(&ctx->num_chunks, num_chunks);
for (i = 0; i < num_chunks; i++) {
if (should_compress)
cur_end = min(end, start + SZ_512K - 1);
else
cur_end = end;
clear_extent_bit(&BTRFS_I(inode)->io_tree, start, end, EXTENT_LOCKED,
1, 0, NULL);
while (start < end) {
async_cow = kmalloc(sizeof(*async_cow), GFP_NOFS);
BUG_ON(!async_cow); /* -ENOMEM */
/*
* igrab is called higher up in the call chain, take only the
* lightweight reference for the callback lifetime
*/
ihold(inode);
async_cow->inode = inode;
async_cow->fs_info = fs_info;
async_cow->locked_page = locked_page;
async_cow->start = start;
async_cow->write_flags = write_flags;
async_chunk[i].pending = &ctx->num_chunks;
async_chunk[i].inode = inode;
async_chunk[i].start = start;
async_chunk[i].end = cur_end;
async_chunk[i].locked_page = locked_page;
async_chunk[i].write_flags = write_flags;
INIT_LIST_HEAD(&async_chunk[i].extents);
if (BTRFS_I(inode)->flags & BTRFS_INODE_NOCOMPRESS &&
!btrfs_test_opt(fs_info, FORCE_COMPRESS))
cur_end = end;
else
cur_end = min(end, start + SZ_512K - 1);
async_cow->end = cur_end;
INIT_LIST_HEAD(&async_cow->extents);
btrfs_init_work(&async_cow->work,
btrfs_init_work(&async_chunk[i].work,
btrfs_delalloc_helper,
async_cow_start, async_cow_submit,
async_cow_free);
nr_pages = (cur_end - start + PAGE_SIZE) >>
PAGE_SHIFT;
nr_pages = DIV_ROUND_UP(cur_end - start, PAGE_SIZE);
atomic_add(nr_pages, &fs_info->async_delalloc_pages);
btrfs_queue_work(fs_info->delalloc_workers, &async_cow->work);
btrfs_queue_work(fs_info->delalloc_workers, &async_chunk[i].work);
*nr_written += nr_pages;
start = cur_end + 1;
@ -1451,7 +1471,7 @@ next_slot:
extent_end = ALIGN(extent_end,
fs_info->sectorsize);
} else {
BUG_ON(1);
BUG();
}
out_check:
if (extent_end <= start) {
@ -1964,11 +1984,11 @@ static blk_status_t btrfs_submit_bio_start(void *private_data, struct bio *bio,
*
* c-3) otherwise: async submit
*/
static blk_status_t btrfs_submit_bio_hook(void *private_data, struct bio *bio,
int mirror_num, unsigned long bio_flags,
u64 bio_offset)
static blk_status_t btrfs_submit_bio_hook(struct inode *inode, struct bio *bio,
int mirror_num,
unsigned long bio_flags)
{
struct inode *inode = private_data;
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
struct btrfs_root *root = BTRFS_I(inode)->root;
enum btrfs_wq_endio_type metadata = BTRFS_WQ_ENDIO_DATA;
@ -2003,8 +2023,7 @@ static blk_status_t btrfs_submit_bio_hook(void *private_data, struct bio *bio,
goto mapit;
/* we're doing a write, do the async checksumming */
ret = btrfs_wq_submit_bio(fs_info, bio, mirror_num, bio_flags,
bio_offset, inode,
btrfs_submit_bio_start);
0, inode, btrfs_submit_bio_start);
goto out;
} else if (!skip_sum) {
ret = btrfs_csum_one_bio(inode, bio, 0, 0);
@ -2531,6 +2550,7 @@ static noinline int relink_extent_backref(struct btrfs_path *path,
struct btrfs_file_extent_item *item;
struct btrfs_ordered_extent *ordered;
struct btrfs_trans_handle *trans;
struct btrfs_ref ref = { 0 };
struct btrfs_root *root;
struct btrfs_key key;
struct extent_buffer *leaf;
@ -2701,10 +2721,11 @@ again:
inode_add_bytes(inode, len);
btrfs_release_path(path);
ret = btrfs_inc_extent_ref(trans, root, new->bytenr,
new->disk_len, 0,
backref->root_id, backref->inum,
new->file_pos); /* start - extent_offset */
btrfs_init_generic_ref(&ref, BTRFS_ADD_DELAYED_REF, new->bytenr,
new->disk_len, 0);
btrfs_init_data_ref(&ref, backref->root_id, backref->inum,
new->file_pos); /* start - extent_offset */
ret = btrfs_inc_extent_ref(trans, &ref);
if (ret) {
btrfs_abort_transaction(trans, ret);
goto out_free_path;
@ -3699,21 +3720,6 @@ cache_index:
* inode is not a directory, logging its parent unnecessarily.
*/
BTRFS_I(inode)->last_unlink_trans = BTRFS_I(inode)->last_trans;
/*
* Similar reasoning for last_link_trans, needs to be set otherwise
* for a case like the following:
*
* mkdir A
* touch foo
* ln foo A/bar
* echo 2 > /proc/sys/vm/drop_caches
* fsync foo
* <power failure>
*
* Would result in link bar and directory A not existing after the power
* failure.
*/
BTRFS_I(inode)->last_link_trans = BTRFS_I(inode)->last_trans;
path->slots[0]++;
if (inode->i_nlink != 1 ||
@ -4679,7 +4685,7 @@ search_again:
btrfs_set_file_extent_ram_bytes(leaf, fi, size);
size = btrfs_file_extent_calc_inline_size(size);
btrfs_truncate_item(root->fs_info, path, size, 1);
btrfs_truncate_item(path, size, 1);
} else if (!del_item) {
/*
* We have to bail so the last_size is set to
@ -4718,12 +4724,17 @@ delete:
if (found_extent &&
(test_bit(BTRFS_ROOT_REF_COWS, &root->state) ||
root == fs_info->tree_root)) {
struct btrfs_ref ref = { 0 };
btrfs_set_path_blocking(path);
bytes_deleted += extent_num_bytes;
ret = btrfs_free_extent(trans, root, extent_start,
extent_num_bytes, 0,
btrfs_header_owner(leaf),
ino, extent_offset);
btrfs_init_generic_ref(&ref, BTRFS_DROP_DELAYED_REF,
extent_start, extent_num_bytes, 0);
ref.real_root = root->root_key.objectid;
btrfs_init_data_ref(&ref, btrfs_header_owner(leaf),
ino, extent_offset);
ret = btrfs_free_extent(trans, &ref);
if (ret) {
btrfs_abort_transaction(trans, ret);
break;
@ -5448,12 +5459,14 @@ no_delete:
}
/*
* this returns the key found in the dir entry in the location pointer.
* Return the key found in the dir entry in the location pointer, fill @type
* with BTRFS_FT_*, and return 0.
*
* If no dir entries were found, returns -ENOENT.
* If found a corrupted location in dir entry, returns -EUCLEAN.
*/
static int btrfs_inode_by_name(struct inode *dir, struct dentry *dentry,
struct btrfs_key *location)
struct btrfs_key *location, u8 *type)
{
const char *name = dentry->d_name.name;
int namelen = dentry->d_name.len;
@ -5482,6 +5495,8 @@ static int btrfs_inode_by_name(struct inode *dir, struct dentry *dentry,
__func__, name, btrfs_ino(BTRFS_I(dir)),
location->objectid, location->type, location->offset);
}
if (!ret)
*type = btrfs_dir_type(path->nodes[0], di);
out:
btrfs_free_path(path);
return ret;
@ -5719,6 +5734,24 @@ static struct inode *new_simple_dir(struct super_block *s,
return inode;
}
static inline u8 btrfs_inode_type(struct inode *inode)
{
/*
* Compile-time asserts that generic FT_* types still match
* BTRFS_FT_* types
*/
BUILD_BUG_ON(BTRFS_FT_UNKNOWN != FT_UNKNOWN);
BUILD_BUG_ON(BTRFS_FT_REG_FILE != FT_REG_FILE);
BUILD_BUG_ON(BTRFS_FT_DIR != FT_DIR);
BUILD_BUG_ON(BTRFS_FT_CHRDEV != FT_CHRDEV);
BUILD_BUG_ON(BTRFS_FT_BLKDEV != FT_BLKDEV);
BUILD_BUG_ON(BTRFS_FT_FIFO != FT_FIFO);
BUILD_BUG_ON(BTRFS_FT_SOCK != FT_SOCK);
BUILD_BUG_ON(BTRFS_FT_SYMLINK != FT_SYMLINK);
return fs_umode_to_ftype(inode->i_mode);
}
struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry)
{
struct btrfs_fs_info *fs_info = btrfs_sb(dir->i_sb);
@ -5726,18 +5759,31 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry)
struct btrfs_root *root = BTRFS_I(dir)->root;
struct btrfs_root *sub_root = root;
struct btrfs_key location;
u8 di_type = 0;
int index;
int ret = 0;
if (dentry->d_name.len > BTRFS_NAME_LEN)
return ERR_PTR(-ENAMETOOLONG);
ret = btrfs_inode_by_name(dir, dentry, &location);
ret = btrfs_inode_by_name(dir, dentry, &location, &di_type);
if (ret < 0)
return ERR_PTR(ret);
if (location.type == BTRFS_INODE_ITEM_KEY) {
inode = btrfs_iget(dir->i_sb, &location, root, NULL);
if (IS_ERR(inode))
return inode;
/* Do extra check against inode mode with di_type */
if (btrfs_inode_type(inode) != di_type) {
btrfs_crit(fs_info,
"inode mode mismatch with dir: inode mode=0%o btrfs type=%u dir type=%u",
inode->i_mode, btrfs_inode_type(inode),
di_type);
iput(inode);
return ERR_PTR(-EUCLEAN);
}
return inode;
}
@ -5797,10 +5843,6 @@ static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
return d_splice_alias(inode, dentry);
}
unsigned char btrfs_filetype_table[] = {
DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
};
/*
* All this infrastructure exists because dir_emit can fault, and we are holding
* the tree lock when doing readdir. For now just allocate a buffer and copy
@ -5939,7 +5981,7 @@ again:
name_ptr = (char *)(entry + 1);
read_extent_buffer(leaf, name_ptr, (unsigned long)(di + 1),
name_len);
put_unaligned(btrfs_filetype_table[btrfs_dir_type(leaf, di)],
put_unaligned(fs_ftype_to_dtype(btrfs_dir_type(leaf, di)),
&entry->type);
btrfs_dir_item_key_to_cpu(leaf, di, &location);
put_unaligned(location.objectid, &entry->ino);
@ -6342,11 +6384,6 @@ fail:
return ERR_PTR(ret);
}
static inline u8 btrfs_inode_type(struct inode *inode)
{
return btrfs_type_by_mode[(inode->i_mode & S_IFMT) >> S_SHIFT];
}
/*
* utility function to add 'inode' into 'parent_inode' with
* a give name and a given sequence number.
@ -6634,7 +6671,6 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
if (err)
goto fail;
}
BTRFS_I(inode)->last_link_trans = trans->transid;
d_instantiate(dentry, inode);
ret = btrfs_log_new_name(trans, BTRFS_I(inode), NULL, parent,
true, NULL);
@ -6864,6 +6900,14 @@ struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
extent_start = found_key.offset;
if (extent_type == BTRFS_FILE_EXTENT_REG ||
extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
/* Only regular file could have regular/prealloc extent */
if (!S_ISREG(inode->vfs_inode.i_mode)) {
ret = -EUCLEAN;
btrfs_crit(fs_info,
"regular/prealloc extent found for non-regular inode %llu",
btrfs_ino(inode));
goto out;
}
extent_end = extent_start +
btrfs_file_extent_num_bytes(leaf, item);
@ -9163,7 +9207,6 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
ei->index_cnt = (u64)-1;
ei->dir_index = 0;
ei->last_unlink_trans = 0;
ei->last_link_trans = 0;
ei->last_log_commit = 0;
spin_lock_init(&ei->lock);
@ -9182,10 +9225,11 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
inode = &ei->vfs_inode;
extent_map_tree_init(&ei->extent_tree);
extent_io_tree_init(&ei->io_tree, inode);
extent_io_tree_init(&ei->io_failure_tree, inode);
ei->io_tree.track_uptodate = 1;
ei->io_failure_tree.track_uptodate = 1;
extent_io_tree_init(fs_info, &ei->io_tree, IO_TREE_INODE_IO, inode);
extent_io_tree_init(fs_info, &ei->io_failure_tree,
IO_TREE_INODE_IO_FAILURE, inode);
ei->io_tree.track_uptodate = true;
ei->io_failure_tree.track_uptodate = true;
atomic_set(&ei->sync_writers, 0);
mutex_init(&ei->log_mutex);
mutex_init(&ei->delalloc_mutex);
@ -9427,7 +9471,7 @@ static int btrfs_rename_exchange(struct inode *old_dir,
/* Reference for the source. */
if (old_ino == BTRFS_FIRST_FREE_OBJECTID) {
/* force full log commit if subvolume involved. */
btrfs_set_log_full_commit(fs_info, trans);
btrfs_set_log_full_commit(trans);
} else {
btrfs_pin_log_trans(root);
root_log_pinned = true;
@ -9444,7 +9488,7 @@ static int btrfs_rename_exchange(struct inode *old_dir,
/* And now for the dest. */
if (new_ino == BTRFS_FIRST_FREE_OBJECTID) {
/* force full log commit if subvolume involved. */
btrfs_set_log_full_commit(fs_info, trans);
btrfs_set_log_full_commit(trans);
} else {
btrfs_pin_log_trans(dest);
dest_log_pinned = true;
@ -9580,7 +9624,7 @@ out_fail:
btrfs_inode_in_log(BTRFS_I(old_inode), fs_info->generation) ||
(new_inode &&
btrfs_inode_in_log(BTRFS_I(new_inode), fs_info->generation)))
btrfs_set_log_full_commit(fs_info, trans);
btrfs_set_log_full_commit(trans);
if (root_log_pinned) {
btrfs_end_log_trans(root);
@ -9766,7 +9810,7 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
BTRFS_I(old_inode)->dir_index = 0ULL;
if (unlikely(old_ino == BTRFS_FIRST_FREE_OBJECTID)) {
/* force full log commit if subvolume involved. */
btrfs_set_log_full_commit(fs_info, trans);
btrfs_set_log_full_commit(trans);
} else {
btrfs_pin_log_trans(root);
log_pinned = true;
@ -9887,7 +9931,7 @@ out_fail:
btrfs_inode_in_log(BTRFS_I(old_inode), fs_info->generation) ||
(new_inode &&
btrfs_inode_in_log(BTRFS_I(new_inode), fs_info->generation)))
btrfs_set_log_full_commit(fs_info, trans);
btrfs_set_log_full_commit(trans);
btrfs_end_log_trans(root);
log_pinned = false;
@ -10190,7 +10234,6 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
inode->i_op = &btrfs_symlink_inode_operations;
inode_nohighmem(inode);
inode->i_mapping->a_ops = &btrfs_aops;
inode_set_bytes(inode, name_len);
btrfs_i_size_write(BTRFS_I(inode), name_len);
err = btrfs_update_inode(trans, root, inode);

181
fs/btrfs/ioctl.c
View file

@ -187,11 +187,10 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
struct btrfs_inode *binode = BTRFS_I(inode);
struct btrfs_root *root = binode->root;
struct btrfs_trans_handle *trans;
unsigned int fsflags, old_fsflags;
unsigned int fsflags;
int ret;
u64 old_flags;
unsigned int old_i_flags;
umode_t mode;
const char *comp = NULL;
u32 binode_flags = binode->flags;
if (!inode_owner_or_capable(inode))
return -EPERM;
@ -212,13 +211,9 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
inode_lock(inode);
old_flags = binode->flags;
old_i_flags = inode->i_flags;
mode = inode->i_mode;
fsflags = btrfs_mask_fsflags_for_type(inode, fsflags);
old_fsflags = btrfs_inode_flags_to_fsflags(binode->flags);
if ((fsflags ^ old_fsflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
if ((fsflags ^ btrfs_inode_flags_to_fsflags(binode->flags)) &
(FS_APPEND_FL | FS_IMMUTABLE_FL)) {
if (!capable(CAP_LINUX_IMMUTABLE)) {
ret = -EPERM;
goto out_unlock;
@ -226,52 +221,52 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
}
if (fsflags & FS_SYNC_FL)
binode->flags |= BTRFS_INODE_SYNC;
binode_flags |= BTRFS_INODE_SYNC;
else
binode->flags &= ~BTRFS_INODE_SYNC;
binode_flags &= ~BTRFS_INODE_SYNC;
if (fsflags & FS_IMMUTABLE_FL)
binode->flags |= BTRFS_INODE_IMMUTABLE;
binode_flags |= BTRFS_INODE_IMMUTABLE;
else
binode->flags &= ~BTRFS_INODE_IMMUTABLE;
binode_flags &= ~BTRFS_INODE_IMMUTABLE;
if (fsflags & FS_APPEND_FL)
binode->flags |= BTRFS_INODE_APPEND;
binode_flags |= BTRFS_INODE_APPEND;
else
binode->flags &= ~BTRFS_INODE_APPEND;
binode_flags &= ~BTRFS_INODE_APPEND;
if (fsflags & FS_NODUMP_FL)
binode->flags |= BTRFS_INODE_NODUMP;
binode_flags |= BTRFS_INODE_NODUMP;
else
binode->flags &= ~BTRFS_INODE_NODUMP;
binode_flags &= ~BTRFS_INODE_NODUMP;
if (fsflags & FS_NOATIME_FL)
binode->flags |= BTRFS_INODE_NOATIME;
binode_flags |= BTRFS_INODE_NOATIME;
else
binode->flags &= ~BTRFS_INODE_NOATIME;
binode_flags &= ~BTRFS_INODE_NOATIME;
if (fsflags & FS_DIRSYNC_FL)
binode->flags |= BTRFS_INODE_DIRSYNC;
binode_flags |= BTRFS_INODE_DIRSYNC;
else
binode->flags &= ~BTRFS_INODE_DIRSYNC;
binode_flags &= ~BTRFS_INODE_DIRSYNC;
if (fsflags & FS_NOCOW_FL) {
if (S_ISREG(mode)) {
if (S_ISREG(inode->i_mode)) {
/*
* It's safe to turn csums off here, no extents exist.
* Otherwise we want the flag to reflect the real COW
* status of the file and will not set it.
*/
if (inode->i_size == 0)
binode->flags |= BTRFS_INODE_NODATACOW
| BTRFS_INODE_NODATASUM;
binode_flags |= BTRFS_INODE_NODATACOW |
BTRFS_INODE_NODATASUM;
} else {
binode->flags |= BTRFS_INODE_NODATACOW;
binode_flags |= BTRFS_INODE_NODATACOW;
}
} else {
/*
* Revert back under same assumptions as above
*/
if (S_ISREG(mode)) {
if (S_ISREG(inode->i_mode)) {
if (inode->i_size == 0)
binode->flags &= ~(BTRFS_INODE_NODATACOW
| BTRFS_INODE_NODATASUM);
binode_flags &= ~(BTRFS_INODE_NODATACOW |
BTRFS_INODE_NODATASUM);
} else {
binode->flags &= ~BTRFS_INODE_NODATACOW;
binode_flags &= ~BTRFS_INODE_NODATACOW;
}
}
@ -281,57 +276,61 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
* things smaller.
*/
if (fsflags & FS_NOCOMP_FL) {
binode->flags &= ~BTRFS_INODE_COMPRESS;
binode->flags |= BTRFS_INODE_NOCOMPRESS;
ret = btrfs_set_prop(inode, "btrfs.compression", NULL, 0, 0);
if (ret && ret != -ENODATA)
goto out_drop;
binode_flags &= ~BTRFS_INODE_COMPRESS;
binode_flags |= BTRFS_INODE_NOCOMPRESS;
} else if (fsflags & FS_COMPR_FL) {
const char *comp;
if (IS_SWAPFILE(inode)) {
ret = -ETXTBSY;
goto out_unlock;
}
binode->flags |= BTRFS_INODE_COMPRESS;
binode->flags &= ~BTRFS_INODE_NOCOMPRESS;
binode_flags |= BTRFS_INODE_COMPRESS;
binode_flags &= ~BTRFS_INODE_NOCOMPRESS;
comp = btrfs_compress_type2str(fs_info->compress_type);
if (!comp || comp[0] == 0)
comp = btrfs_compress_type2str(BTRFS_COMPRESS_ZLIB);
ret = btrfs_set_prop(inode, "btrfs.compression",
comp, strlen(comp), 0);
if (ret)
goto out_drop;
} else {
ret = btrfs_set_prop(inode, "btrfs.compression", NULL, 0, 0);
if (ret && ret != -ENODATA)
goto out_drop;
binode->flags &= ~(BTRFS_INODE_COMPRESS | BTRFS_INODE_NOCOMPRESS);
binode_flags &= ~(BTRFS_INODE_COMPRESS | BTRFS_INODE_NOCOMPRESS);
}
trans = btrfs_start_transaction(root, 1);
/*
* 1 for inode item
* 2 for properties
*/
trans = btrfs_start_transaction(root, 3);
if (IS_ERR(trans)) {
ret = PTR_ERR(trans);
goto out_drop;
goto out_unlock;
}
if (comp) {
ret = btrfs_set_prop(trans, inode, "btrfs.compression", comp,
strlen(comp), 0);
if (ret) {
btrfs_abort_transaction(trans, ret);
goto out_end_trans;
}
set_bit(BTRFS_INODE_COPY_EVERYTHING,
&BTRFS_I(inode)->runtime_flags);
} else {
ret = btrfs_set_prop(trans, inode, "btrfs.compression", NULL,
0, 0);
if (ret && ret != -ENODATA) {
btrfs_abort_transaction(trans, ret);
goto out_end_trans;
}
}
binode->flags = binode_flags;
btrfs_sync_inode_flags_to_i_flags(inode);
inode_inc_iversion(inode);
inode->i_ctime = current_time(inode);
ret = btrfs_update_inode(trans, root, inode);
out_end_trans:
btrfs_end_transaction(trans);
out_drop:
if (ret) {
binode->flags = old_flags;
inode->i_flags = old_i_flags;
}
out_unlock:
inode_unlock(inode);
mnt_drop_write_file(file);
@ -3260,6 +3259,19 @@ static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen,
{
int ret;
u64 i, tail_len, chunk_count;
struct btrfs_root *root_dst = BTRFS_I(dst)->root;
spin_lock(&root_dst->root_item_lock);
if (root_dst->send_in_progress) {
btrfs_warn_rl(root_dst->fs_info,
"cannot deduplicate to root %llu while send operations are using it (%d in progress)",
root_dst->root_key.objectid,
root_dst->send_in_progress);
spin_unlock(&root_dst->root_item_lock);
return -EAGAIN;
}
root_dst->dedupe_in_progress++;
spin_unlock(&root_dst->root_item_lock);
tail_len = olen % BTRFS_MAX_DEDUPE_LEN;
chunk_count = div_u64(olen, BTRFS_MAX_DEDUPE_LEN);
@ -3268,7 +3280,7 @@ static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen,
ret = btrfs_extent_same_range(src, loff, BTRFS_MAX_DEDUPE_LEN,
dst, dst_loff);
if (ret)
return ret;
goto out;
loff += BTRFS_MAX_DEDUPE_LEN;
dst_loff += BTRFS_MAX_DEDUPE_LEN;
@ -3277,6 +3289,10 @@ static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen,
if (tail_len > 0)
ret = btrfs_extent_same_range(src, loff, tail_len, dst,
dst_loff);
out:
spin_lock(&root_dst->root_item_lock);
root_dst->dedupe_in_progress--;
spin_unlock(&root_dst->root_item_lock);
return ret;
}
@ -3735,13 +3751,16 @@ process_slot:
datal);
if (disko) {
struct btrfs_ref ref = { 0 };
inode_add_bytes(inode, datal);
ret = btrfs_inc_extent_ref(trans,
root,
disko, diskl, 0,
root->root_key.objectid,
btrfs_ino(BTRFS_I(inode)),
new_key.offset - datao);
btrfs_init_generic_ref(&ref,
BTRFS_ADD_DELAYED_REF, disko,
diskl, 0);
btrfs_init_data_ref(&ref,
root->root_key.objectid,
btrfs_ino(BTRFS_I(inode)),
new_key.offset - datao);
ret = btrfs_inc_extent_ref(trans, &ref);
if (ret) {
btrfs_abort_transaction(trans,
ret);
@ -3948,16 +3967,10 @@ static int btrfs_remap_file_range_prep(struct file *file_in, loff_t pos_in,
return -EXDEV;
}
if (same_inode)
inode_lock(inode_in);
else
lock_two_nondirectories(inode_in, inode_out);
/* don't make the dst file partly checksummed */
if ((BTRFS_I(inode_in)->flags & BTRFS_INODE_NODATASUM) !=
(BTRFS_I(inode_out)->flags & BTRFS_INODE_NODATASUM)) {
ret = -EINVAL;
goto out_unlock;
return -EINVAL;
}
/*
@ -3991,26 +4004,14 @@ static int btrfs_remap_file_range_prep(struct file *file_in, loff_t pos_in,
ret = btrfs_wait_ordered_range(inode_in, ALIGN_DOWN(pos_in, bs),
wb_len);
if (ret < 0)
goto out_unlock;
return ret;
ret = btrfs_wait_ordered_range(inode_out, ALIGN_DOWN(pos_out, bs),
wb_len);
if (ret < 0)
goto out_unlock;
return ret;
ret = generic_remap_file_range_prep(file_in, pos_in, file_out, pos_out,
return generic_remap_file_range_prep(file_in, pos_in, file_out, pos_out,
len, remap_flags);
if (ret < 0 || *len == 0)
goto out_unlock;
return 0;
out_unlock:
if (same_inode)
inode_unlock(inode_in);
else
unlock_two_nondirectories(inode_in, inode_out);
return ret;
}
loff_t btrfs_remap_file_range(struct file *src_file, loff_t off,
@ -4025,16 +4026,22 @@ loff_t btrfs_remap_file_range(struct file *src_file, loff_t off,
if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
return -EINVAL;
if (same_inode)
inode_lock(src_inode);
else
lock_two_nondirectories(src_inode, dst_inode);
ret = btrfs_remap_file_range_prep(src_file, off, dst_file, destoff,
&len, remap_flags);
if (ret < 0 || len == 0)
return ret;
goto out_unlock;
if (remap_flags & REMAP_FILE_DEDUP)
ret = btrfs_extent_same(src_inode, off, len, dst_inode, destoff);
else
ret = btrfs_clone_files(dst_file, src_file, off, len, destoff);
out_unlock:
if (same_inode)
inode_unlock(src_inode);
else

157
fs/btrfs/locking.c
View file

@ -12,10 +12,82 @@
#include "extent_io.h"
#include "locking.h"
static void btrfs_assert_tree_read_locked(struct extent_buffer *eb);
#ifdef CONFIG_BTRFS_DEBUG
static void btrfs_assert_spinning_writers_get(struct extent_buffer *eb)
{
WARN_ON(atomic_read(&eb->spinning_writers));
atomic_inc(&eb->spinning_writers);
}
static void btrfs_assert_spinning_writers_put(struct extent_buffer *eb)
{
WARN_ON(atomic_read(&eb->spinning_writers) != 1);
atomic_dec(&eb->spinning_writers);
}
static void btrfs_assert_no_spinning_writers(struct extent_buffer *eb)
{
WARN_ON(atomic_read(&eb->spinning_writers));
}
static void btrfs_assert_spinning_readers_get(struct extent_buffer *eb)
{
atomic_inc(&eb->spinning_readers);
}
static void btrfs_assert_spinning_readers_put(struct extent_buffer *eb)
{
WARN_ON(atomic_read(&eb->spinning_readers) == 0);
atomic_dec(&eb->spinning_readers);
}
static void btrfs_assert_tree_read_locks_get(struct extent_buffer *eb)
{
atomic_inc(&eb->read_locks);
}
static void btrfs_assert_tree_read_locks_put(struct extent_buffer *eb)
{
atomic_dec(&eb->read_locks);
}
static void btrfs_assert_tree_read_locked(struct extent_buffer *eb)
{
BUG_ON(!atomic_read(&eb->read_locks));
}
static void btrfs_assert_tree_write_locks_get(struct extent_buffer *eb)
{
atomic_inc(&eb->write_locks);
}
static void btrfs_assert_tree_write_locks_put(struct extent_buffer *eb)
{
atomic_dec(&eb->write_locks);
}
void btrfs_assert_tree_locked(struct extent_buffer *eb)
{
BUG_ON(!atomic_read(&eb->write_locks));
}
#else
static void btrfs_assert_spinning_writers_get(struct extent_buffer *eb) { }
static void btrfs_assert_spinning_writers_put(struct extent_buffer *eb) { }
static void btrfs_assert_no_spinning_writers(struct extent_buffer *eb) { }
static void btrfs_assert_spinning_readers_put(struct extent_buffer *eb) { }
static void btrfs_assert_spinning_readers_get(struct extent_buffer *eb) { }
static void btrfs_assert_tree_read_locked(struct extent_buffer *eb) { }
static void btrfs_assert_tree_read_locks_get(struct extent_buffer *eb) { }
static void btrfs_assert_tree_read_locks_put(struct extent_buffer *eb) { }
void btrfs_assert_tree_locked(struct extent_buffer *eb) { }
static void btrfs_assert_tree_write_locks_get(struct extent_buffer *eb) { }
static void btrfs_assert_tree_write_locks_put(struct extent_buffer *eb) { }
#endif
void btrfs_set_lock_blocking_read(struct extent_buffer *eb)
{
trace_btrfs_set_lock_blocking_read(eb);
/*
* No lock is required. The lock owner may change if we have a read
* lock, but it won't change to or away from us. If we have the write
@ -25,13 +97,13 @@ void btrfs_set_lock_blocking_read(struct extent_buffer *eb)
return;
btrfs_assert_tree_read_locked(eb);
atomic_inc(&eb->blocking_readers);
WARN_ON(atomic_read(&eb->spinning_readers) == 0);
atomic_dec(&eb->spinning_readers);
btrfs_assert_spinning_readers_put(eb);
read_unlock(&eb->lock);
}
void btrfs_set_lock_blocking_write(struct extent_buffer *eb)
{
trace_btrfs_set_lock_blocking_write(eb);
/*
* No lock is required. The lock owner may change if we have a read
* lock, but it won't change to or away from us. If we have the write
@ -40,8 +112,7 @@ void btrfs_set_lock_blocking_write(struct extent_buffer *eb)
if (eb->lock_nested && current->pid == eb->lock_owner)
return;
if (atomic_read(&eb->blocking_writers) == 0) {
WARN_ON(atomic_read(&eb->spinning_writers) != 1);
atomic_dec(&eb->spinning_writers);
btrfs_assert_spinning_writers_put(eb);
btrfs_assert_tree_locked(eb);
atomic_inc(&eb->blocking_writers);
write_unlock(&eb->lock);
@ -50,6 +121,7 @@ void btrfs_set_lock_blocking_write(struct extent_buffer *eb)
void btrfs_clear_lock_blocking_read(struct extent_buffer *eb)
{
trace_btrfs_clear_lock_blocking_read(eb);
/*
* No lock is required. The lock owner may change if we have a read
* lock, but it won't change to or away from us. If we have the write
@ -59,7 +131,7 @@ void btrfs_clear_lock_blocking_read(struct extent_buffer *eb)
return;
BUG_ON(atomic_read(&eb->blocking_readers) == 0);
read_lock(&eb->lock);
atomic_inc(&eb->spinning_readers);
btrfs_assert_spinning_readers_get(eb);
/* atomic_dec_and_test implies a barrier */
if (atomic_dec_and_test(&eb->blocking_readers))
cond_wake_up_nomb(&eb->read_lock_wq);
@ -67,6 +139,7 @@ void btrfs_clear_lock_blocking_read(struct extent_buffer *eb)
void btrfs_clear_lock_blocking_write(struct extent_buffer *eb)
{
trace_btrfs_clear_lock_blocking_write(eb);
/*
* no lock is required. The lock owner may change if
* we have a read lock, but it won't change to or away
@ -77,8 +150,7 @@ void btrfs_clear_lock_blocking_write(struct extent_buffer *eb)
return;
BUG_ON(atomic_read(&eb->blocking_writers) != 1);
write_lock(&eb->lock);
WARN_ON(atomic_read(&eb->spinning_writers));
atomic_inc(&eb->spinning_writers);
btrfs_assert_spinning_writers_get(eb);
/* atomic_dec_and_test implies a barrier */
if (atomic_dec_and_test(&eb->blocking_writers))
cond_wake_up_nomb(&eb->write_lock_wq);
@ -90,6 +162,10 @@ void btrfs_clear_lock_blocking_write(struct extent_buffer *eb)
*/
void btrfs_tree_read_lock(struct extent_buffer *eb)
{
u64 start_ns = 0;
if (trace_btrfs_tree_read_lock_enabled())
start_ns = ktime_get_ns();
again:
BUG_ON(!atomic_read(&eb->blocking_writers) &&
current->pid == eb->lock_owner);
@ -104,8 +180,9 @@ again:
* called on a partly (write-)locked tree.
*/
BUG_ON(eb->lock_nested);
eb->lock_nested = 1;
eb->lock_nested = true;
read_unlock(&eb->lock);
trace_btrfs_tree_read_lock(eb, start_ns);
return;
}
if (atomic_read(&eb->blocking_writers)) {
@ -114,8 +191,9 @@ again:
atomic_read(&eb->blocking_writers) == 0);
goto again;
}
atomic_inc(&eb->read_locks);
atomic_inc(&eb->spinning_readers);
btrfs_assert_tree_read_locks_get(eb);
btrfs_assert_spinning_readers_get(eb);
trace_btrfs_tree_read_lock(eb, start_ns);
}
/*
@ -133,8 +211,9 @@ int btrfs_tree_read_lock_atomic(struct extent_buffer *eb)
read_unlock(&eb->lock);
return 0;
}
atomic_inc(&eb->read_locks);
atomic_inc(&eb->spinning_readers);
btrfs_assert_tree_read_locks_get(eb);
btrfs_assert_spinning_readers_get(eb);
trace_btrfs_tree_read_lock_atomic(eb);
return 1;
}
@ -154,8 +233,9 @@ int btrfs_try_tree_read_lock(struct extent_buffer *eb)
read_unlock(&eb->lock);
return 0;
}
atomic_inc(&eb->read_locks);
atomic_inc(&eb->spinning_readers);
btrfs_assert_tree_read_locks_get(eb);
btrfs_assert_spinning_readers_get(eb);
trace_btrfs_try_tree_read_lock(eb);
return 1;
}
@ -175,9 +255,10 @@ int btrfs_try_tree_write_lock(struct extent_buffer *eb)
write_unlock(&eb->lock);
return 0;
}
atomic_inc(&eb->write_locks);
atomic_inc(&eb->spinning_writers);
btrfs_assert_tree_write_locks_get(eb);
btrfs_assert_spinning_writers_get(eb);
eb->lock_owner = current->pid;
trace_btrfs_try_tree_write_lock(eb);
return 1;
}
@ -186,6 +267,7 @@ int btrfs_try_tree_write_lock(struct extent_buffer *eb)
*/
void btrfs_tree_read_unlock(struct extent_buffer *eb)
{
trace_btrfs_tree_read_unlock(eb);
/*
* if we're nested, we have the write lock. No new locking
* is needed as long as we are the lock owner.
@ -193,13 +275,12 @@ void btrfs_tree_read_unlock(struct extent_buffer *eb)
* field only matters to the lock owner.
*/
if (eb->lock_nested && current->pid == eb->lock_owner) {
eb->lock_nested = 0;
eb->lock_nested = false;
return;
}
btrfs_assert_tree_read_locked(eb);
WARN_ON(atomic_read(&eb->spinning_readers) == 0);
atomic_dec(&eb->spinning_readers);
atomic_dec(&eb->read_locks);
btrfs_assert_spinning_readers_put(eb);
btrfs_assert_tree_read_locks_put(eb);
read_unlock(&eb->lock);
}
@ -208,6 +289,7 @@ void btrfs_tree_read_unlock(struct extent_buffer *eb)
*/
void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb)
{
trace_btrfs_tree_read_unlock_blocking(eb);
/*
* if we're nested, we have the write lock. No new locking
* is needed as long as we are the lock owner.
@ -215,7 +297,7 @@ void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb)
* field only matters to the lock owner.
*/
if (eb->lock_nested && current->pid == eb->lock_owner) {
eb->lock_nested = 0;
eb->lock_nested = false;
return;
}
btrfs_assert_tree_read_locked(eb);
@ -223,7 +305,7 @@ void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb)
/* atomic_dec_and_test implies a barrier */
if (atomic_dec_and_test(&eb->blocking_readers))
cond_wake_up_nomb(&eb->read_lock_wq);
atomic_dec(&eb->read_locks);
btrfs_assert_tree_read_locks_put(eb);
}
/*
@ -232,6 +314,11 @@ void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb)
*/
void btrfs_tree_lock(struct extent_buffer *eb)
{
u64 start_ns = 0;
if (trace_btrfs_tree_lock_enabled())
start_ns = ktime_get_ns();
WARN_ON(eb->lock_owner == current->pid);
again:
wait_event(eb->read_lock_wq, atomic_read(&eb->blocking_readers) == 0);
@ -242,10 +329,10 @@ again:
write_unlock(&eb->lock);
goto again;
}
WARN_ON(atomic_read(&eb->spinning_writers));
atomic_inc(&eb->spinning_writers);
atomic_inc(&eb->write_locks);
btrfs_assert_spinning_writers_get(eb);
btrfs_assert_tree_write_locks_get(eb);
eb->lock_owner = current->pid;
trace_btrfs_tree_lock(eb, start_ns);
}
/*
@ -258,28 +345,18 @@ void btrfs_tree_unlock(struct extent_buffer *eb)
BUG_ON(blockers > 1);
btrfs_assert_tree_locked(eb);
trace_btrfs_tree_unlock(eb);
eb->lock_owner = 0;
atomic_dec(&eb->write_locks);
btrfs_assert_tree_write_locks_put(eb);
if (blockers) {
WARN_ON(atomic_read(&eb->spinning_writers));
btrfs_assert_no_spinning_writers(eb);
atomic_dec(&eb->blocking_writers);
/* Use the lighter barrier after atomic */
smp_mb__after_atomic();
cond_wake_up_nomb(&eb->write_lock_wq);
} else {
WARN_ON(atomic_read(&eb->spinning_writers) != 1);
atomic_dec(&eb->spinning_writers);
btrfs_assert_spinning_writers_put(eb);
write_unlock(&eb->lock);
}
}
void btrfs_assert_tree_locked(struct extent_buffer *eb)
{
BUG_ON(!atomic_read(&eb->write_locks));
}
static void btrfs_assert_tree_read_locked(struct extent_buffer *eb)
{
BUG_ON(!atomic_read(&eb->read_locks));
}

14
fs/btrfs/ordered-data.c
View file

@ -195,8 +195,11 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
if (type != BTRFS_ORDERED_IO_DONE && type != BTRFS_ORDERED_COMPLETE)
set_bit(type, &entry->flags);
if (dio)
if (dio) {
percpu_counter_add_batch(&fs_info->dio_bytes, len,
fs_info->delalloc_batch);
set_bit(BTRFS_ORDERED_DIRECT, &entry->flags);
}
/* one ref for the tree */
refcount_set(&entry->refs, 1);
@ -271,13 +274,12 @@ int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset,
* when an ordered extent is finished. If the list covers more than one
* ordered extent, it is split across multiples.
*/
void btrfs_add_ordered_sum(struct inode *inode,
struct btrfs_ordered_extent *entry,
void btrfs_add_ordered_sum(struct btrfs_ordered_extent *entry,
struct btrfs_ordered_sum *sum)
{
struct btrfs_ordered_inode_tree *tree;
tree = &BTRFS_I(inode)->ordered_tree;
tree = &BTRFS_I(entry->inode)->ordered_tree;
spin_lock_irq(&tree->lock);
list_add_tail(&sum->list, &entry->list);
spin_unlock_irq(&tree->lock);
@ -469,6 +471,10 @@ void btrfs_remove_ordered_extent(struct inode *inode,
if (root != fs_info->tree_root)
btrfs_delalloc_release_metadata(btrfs_inode, entry->len, false);
if (test_bit(BTRFS_ORDERED_DIRECT, &entry->flags))
percpu_counter_add_batch(&fs_info->dio_bytes, -entry->len,
fs_info->delalloc_batch);
tree = &btrfs_inode->ordered_tree;
spin_lock_irq(&tree->lock);
node = &entry->rb_node;

3
fs/btrfs/ordered-data.h
View file

@ -167,8 +167,7 @@ int btrfs_add_ordered_extent_dio(struct inode *inode, u64 file_offset,
int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset,
u64 start, u64 len, u64 disk_len,
int type, int compress_type);
void btrfs_add_ordered_sum(struct inode *inode,
struct btrfs_ordered_extent *entry,
void btrfs_add_ordered_sum(struct btrfs_ordered_extent *entry,
struct btrfs_ordered_sum *sum);
struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct inode *inode,
u64 file_offset);

2
fs/btrfs/print-tree.c
View file

@ -189,7 +189,7 @@ void btrfs_print_leaf(struct extent_buffer *l)
btrfs_info(fs_info,
"leaf %llu gen %llu total ptrs %d free space %d owner %llu",
btrfs_header_bytenr(l), btrfs_header_generation(l), nr,
btrfs_leaf_free_space(fs_info, l), btrfs_header_owner(l));
btrfs_leaf_free_space(l), btrfs_header_owner(l));
print_eb_refs_lock(l);
for (i = 0 ; i < nr ; i++) {
item = btrfs_item_nr(i);

286
fs/btrfs/props.c
View file

@ -23,36 +23,6 @@ struct prop_handler {
int inheritable;
};
static int prop_compression_validate(const char *value, size_t len);
static int prop_compression_apply(struct inode *inode,
const char *value,
size_t len);
static const char *prop_compression_extract(struct inode *inode);
static struct prop_handler prop_handlers[] = {
{
.xattr_name = XATTR_BTRFS_PREFIX "compression",
.validate = prop_compression_validate,
.apply = prop_compression_apply,
.extract = prop_compression_extract,
.inheritable = 1
},
};
void __init btrfs_props_init(void)
{
int i;
hash_init(prop_handlers_ht);
for (i = 0; i < ARRAY_SIZE(prop_handlers); i++) {
struct prop_handler *p = &prop_handlers[i];
u64 h = btrfs_name_hash(p->xattr_name, strlen(p->xattr_name));
hash_add(prop_handlers_ht, &p->node, h);
}
}
static const struct hlist_head *find_prop_handlers_by_hash(const u64 hash)
{
struct hlist_head *h;
@ -85,26 +55,37 @@ find_prop_handler(const char *name,
return NULL;
}
static int __btrfs_set_prop(struct btrfs_trans_handle *trans,
struct inode *inode,
const char *name,
const char *value,
size_t value_len,
int flags)
int btrfs_validate_prop(const char *name, const char *value, size_t value_len)
{
const struct prop_handler *handler;
int ret;
if (strlen(name) <= XATTR_BTRFS_PREFIX_LEN)
return -EINVAL;
handler = find_prop_handler(name, NULL);
if (!handler)
return -EINVAL;
if (value_len == 0)
return 0;
return handler->validate(value, value_len);
}
int btrfs_set_prop(struct btrfs_trans_handle *trans, struct inode *inode,
const char *name, const char *value, size_t value_len,
int flags)
{
const struct prop_handler *handler;
int ret;
handler = find_prop_handler(name, NULL);
if (!handler)
return -EINVAL;
if (value_len == 0) {
ret = btrfs_setxattr(trans, inode, handler->xattr_name,
NULL, 0, flags);
NULL, 0, flags);
if (ret)
return ret;
@ -114,17 +95,14 @@ static int __btrfs_set_prop(struct btrfs_trans_handle *trans,
return ret;
}
ret = handler->validate(value, value_len);
if (ret)
return ret;
ret = btrfs_setxattr(trans, inode, handler->xattr_name,
value, value_len, flags);
ret = btrfs_setxattr(trans, inode, handler->xattr_name, value,
value_len, flags);
if (ret)
return ret;
ret = handler->apply(inode, value, value_len);
if (ret) {
btrfs_setxattr(trans, inode, handler->xattr_name,
NULL, 0, flags);
btrfs_setxattr(trans, inode, handler->xattr_name, NULL,
0, flags);
return ret;
}
@ -133,15 +111,6 @@ static int __btrfs_set_prop(struct btrfs_trans_handle *trans,
return 0;
}
int btrfs_set_prop(struct inode *inode,
const char *name,
const char *value,
size_t value_len,
int flags)
{
return __btrfs_set_prop(NULL, inode, name, value, value_len, flags);
}
static int iterate_object_props(struct btrfs_root *root,
struct btrfs_path *path,
u64 objectid,
@ -283,89 +252,11 @@ int btrfs_load_inode_props(struct inode *inode, struct btrfs_path *path)
return ret;
}
static int inherit_props(struct btrfs_trans_handle *trans,
struct inode *inode,
struct inode *parent)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_fs_info *fs_info = root->fs_info;
int ret;
int i;
if (!test_bit(BTRFS_INODE_HAS_PROPS,
&BTRFS_I(parent)->runtime_flags))
return 0;
for (i = 0; i < ARRAY_SIZE(prop_handlers); i++) {
const struct prop_handler *h = &prop_handlers[i];
const char *value;
u64 num_bytes;
if (!h->inheritable)
continue;
value = h->extract(parent);
if (!value)
continue;
num_bytes = btrfs_calc_trans_metadata_size(fs_info, 1);
ret = btrfs_block_rsv_add(root, trans->block_rsv,
num_bytes, BTRFS_RESERVE_NO_FLUSH);
if (ret)
goto out;
ret = __btrfs_set_prop(trans, inode, h->xattr_name,
value, strlen(value), 0);
btrfs_block_rsv_release(fs_info, trans->block_rsv, num_bytes);
if (ret)
goto out;
}
ret = 0;
out:
return ret;
}
int btrfs_inode_inherit_props(struct btrfs_trans_handle *trans,
struct inode *inode,
struct inode *dir)
{
if (!dir)
return 0;
return inherit_props(trans, inode, dir);
}
int btrfs_subvol_inherit_props(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_root *parent_root)
{
struct super_block *sb = root->fs_info->sb;
struct btrfs_key key;
struct inode *parent_inode, *child_inode;
int ret;
key.objectid = BTRFS_FIRST_FREE_OBJECTID;
key.type = BTRFS_INODE_ITEM_KEY;
key.offset = 0;
parent_inode = btrfs_iget(sb, &key, parent_root, NULL);
if (IS_ERR(parent_inode))
return PTR_ERR(parent_inode);
child_inode = btrfs_iget(sb, &key, root, NULL);
if (IS_ERR(child_inode)) {
iput(parent_inode);
return PTR_ERR(child_inode);
}
ret = inherit_props(trans, child_inode, parent_inode);
iput(child_inode);
iput(parent_inode);
return ret;
}
static int prop_compression_validate(const char *value, size_t len)
{
if (!value)
return 0;
if (!strncmp("lzo", value, 3))
return 0;
else if (!strncmp("zlib", value, 4))
@ -376,8 +267,7 @@ static int prop_compression_validate(const char *value, size_t len)
return -EINVAL;
}
static int prop_compression_apply(struct inode *inode,
const char *value,
static int prop_compression_apply(struct inode *inode, const char *value,
size_t len)
{
struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
@ -424,4 +314,126 @@ static const char *prop_compression_extract(struct inode *inode)
return NULL;
}
static struct prop_handler prop_handlers[] = {
{
.xattr_name = XATTR_BTRFS_PREFIX "compression",
.validate = prop_compression_validate,
.apply = prop_compression_apply,
.extract = prop_compression_extract,
.inheritable = 1
},
};
static int inherit_props(struct btrfs_trans_handle *trans,
struct inode *inode,
struct inode *parent)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_fs_info *fs_info = root->fs_info;
int ret;
int i;
if (!test_bit(BTRFS_INODE_HAS_PROPS,
&BTRFS_I(parent)->runtime_flags))
return 0;
for (i = 0; i < ARRAY_SIZE(prop_handlers); i++) {
const struct prop_handler *h = &prop_handlers[i];
const char *value;
u64 num_bytes;
if (!h->inheritable)
continue;
value = h->extract(parent);
if (!value)
continue;
/*
* This is not strictly necessary as the property should be
* valid, but in case it isn't, don't propagate it futher.
*/
ret = h->validate(value, strlen(value));
if (ret)
continue;
num_bytes = btrfs_calc_trans_metadata_size(fs_info, 1);
ret = btrfs_block_rsv_add(root, trans->block_rsv,
num_bytes, BTRFS_RESERVE_NO_FLUSH);
if (ret)
return ret;
ret = btrfs_setxattr(trans, inode, h->xattr_name, value,
strlen(value), 0);
if (!ret) {
ret = h->apply(inode, value, strlen(value));
if (ret)
btrfs_setxattr(trans, inode, h->xattr_name,
NULL, 0, 0);
else
set_bit(BTRFS_INODE_HAS_PROPS,
&BTRFS_I(inode)->runtime_flags);
}
btrfs_block_rsv_release(fs_info, trans->block_rsv, num_bytes);
if (ret)
return ret;
}
return 0;
}
int btrfs_inode_inherit_props(struct btrfs_trans_handle *trans,
struct inode *inode,
struct inode *dir)
{
if (!dir)
return 0;
return inherit_props(trans, inode, dir);
}
int btrfs_subvol_inherit_props(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_root *parent_root)
{
struct super_block *sb = root->fs_info->sb;
struct btrfs_key key;
struct inode *parent_inode, *child_inode;
int ret;
key.objectid = BTRFS_FIRST_FREE_OBJECTID;
key.type = BTRFS_INODE_ITEM_KEY;
key.offset = 0;
parent_inode = btrfs_iget(sb, &key, parent_root, NULL);
if (IS_ERR(parent_inode))
return PTR_ERR(parent_inode);
child_inode = btrfs_iget(sb, &key, root, NULL);
if (IS_ERR(child_inode)) {
iput(parent_inode);
return PTR_ERR(child_inode);
}
ret = inherit_props(trans, child_inode, parent_inode);
iput(child_inode);
iput(parent_inode);
return ret;
}
void __init btrfs_props_init(void)
{
int i;
hash_init(prop_handlers_ht);
for (i = 0; i < ARRAY_SIZE(prop_handlers); i++) {
struct prop_handler *p = &prop_handlers[i];
u64 h = btrfs_name_hash(p->xattr_name, strlen(p->xattr_name));
hash_add(prop_handlers_ht, &p->node, h);
}
}

7
fs/btrfs/props.h
View file

@ -10,11 +10,10 @@
void __init btrfs_props_init(void);
int btrfs_set_prop(struct inode *inode,
const char *name,
const char *value,
size_t value_len,
int btrfs_set_prop(struct btrfs_trans_handle *trans, struct inode *inode,
const char *name, const char *value, size_t value_len,
int flags);
int btrfs_validate_prop(const char *name, const char *value, size_t value_len);
int btrfs_load_inode_props(struct inode *inode, struct btrfs_path *path);

5
fs/btrfs/qgroup.c
View file

@ -918,8 +918,7 @@ int btrfs_quota_enable(struct btrfs_fs_info *fs_info)
/*
* initially create the quota tree
*/
quota_root = btrfs_create_tree(trans, fs_info,
BTRFS_QUOTA_TREE_OBJECTID);
quota_root = btrfs_create_tree(trans, BTRFS_QUOTA_TREE_OBJECTID);
if (IS_ERR(quota_root)) {
ret = PTR_ERR(quota_root);
btrfs_abort_transaction(trans, ret);
@ -1101,7 +1100,7 @@ int btrfs_quota_disable(struct btrfs_fs_info *fs_info)
list_del(&quota_root->dirty_list);
btrfs_tree_lock(quota_root->node);
clean_tree_block(fs_info, quota_root->node);
btrfs_clean_tree_block(quota_root->node);
btrfs_tree_unlock(quota_root->node);
btrfs_free_tree_block(trans, quota_root, quota_root->node, 0, 1);

53
fs/btrfs/ref-verify.c
View file

@ -659,36 +659,43 @@ static void dump_block_entry(struct btrfs_fs_info *fs_info,
/*
* btrfs_ref_tree_mod: called when we modify a ref for a bytenr
* @root: the root we are making this modification from.
* @bytenr: the bytenr we are modifying.
* @num_bytes: number of bytes.
* @parent: the parent bytenr.
* @ref_root: the original root owner of the bytenr.
* @owner: level in the case of metadata, inode in the case of data.
* @offset: 0 for metadata, file offset for data.
* @action: the action that we are doing, this is the same as the delayed ref
* action.
*
* This will add an action item to the given bytenr and do sanity checks to make
* sure we haven't messed something up. If we are making a new allocation and
* this block entry has history we will delete all previous actions as long as
* our sanity checks pass as they are no longer needed.
*/
int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
u64 parent, u64 ref_root, u64 owner, u64 offset,
int action)
int btrfs_ref_tree_mod(struct btrfs_fs_info *fs_info,
struct btrfs_ref *generic_ref)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct ref_entry *ref = NULL, *exist;
struct ref_action *ra = NULL;
struct block_entry *be = NULL;
struct root_entry *re = NULL;
int action = generic_ref->action;
int ret = 0;
bool metadata = owner < BTRFS_FIRST_FREE_OBJECTID;
bool metadata;
u64 bytenr = generic_ref->bytenr;
u64 num_bytes = generic_ref->len;
u64 parent = generic_ref->parent;
u64 ref_root;
u64 owner;
u64 offset;
if (!btrfs_test_opt(root->fs_info, REF_VERIFY))
if (!btrfs_test_opt(fs_info, REF_VERIFY))
return 0;
if (generic_ref->type == BTRFS_REF_METADATA) {
ref_root = generic_ref->tree_ref.root;
owner = generic_ref->tree_ref.level;
offset = 0;
} else {
ref_root = generic_ref->data_ref.ref_root;
owner = generic_ref->data_ref.ino;
offset = generic_ref->data_ref.offset;
}
metadata = owner < BTRFS_FIRST_FREE_OBJECTID;
ref = kzalloc(sizeof(struct ref_entry), GFP_NOFS);
ra = kmalloc(sizeof(struct ref_action), GFP_NOFS);
if (!ra || !ref) {
@ -721,7 +728,7 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
INIT_LIST_HEAD(&ra->list);
ra->action = action;
ra->root = root->root_key.objectid;
ra->root = generic_ref->real_root;
/*
* This is an allocation, preallocate the block_entry in case we haven't
@ -734,7 +741,7 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
* is and the new root objectid, so let's not treat the passed
* in root as if it really has a ref for this bytenr.
*/
be = add_block_entry(root->fs_info, bytenr, num_bytes, ref_root);
be = add_block_entry(fs_info, bytenr, num_bytes, ref_root);
if (IS_ERR(be)) {
kfree(ra);
ret = PTR_ERR(be);
@ -776,13 +783,13 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
* one we want to lookup below when we modify the
* re->num_refs.
*/
ref_root = root->root_key.objectid;
re->root_objectid = root->root_key.objectid;
ref_root = generic_ref->real_root;
re->root_objectid = generic_ref->real_root;
re->num_refs = 0;
}
spin_lock(&root->fs_info->ref_verify_lock);
be = lookup_block_entry(&root->fs_info->block_tree, bytenr);
spin_lock(&fs_info->ref_verify_lock);
be = lookup_block_entry(&fs_info->block_tree, bytenr);
if (!be) {
btrfs_err(fs_info,
"trying to do action %d to bytenr %llu num_bytes %llu but there is no existing entry!",
@ -851,7 +858,7 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
* didn't think of some other corner case.
*/
btrfs_err(fs_info, "failed to find root %llu for %llu",
root->root_key.objectid, be->bytenr);
generic_ref->real_root, be->bytenr);
dump_block_entry(fs_info, be);
dump_ref_action(fs_info, ra);
kfree(ra);
@ -870,7 +877,7 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
list_add_tail(&ra->list, &be->actions);
ret = 0;
out_unlock:
spin_unlock(&root->fs_info->ref_verify_lock);
spin_unlock(&fs_info->ref_verify_lock);
out:
if (ret)
btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY);

10
fs/btrfs/ref-verify.h
View file

@ -9,9 +9,8 @@
#ifdef CONFIG_BTRFS_FS_REF_VERIFY
int btrfs_build_ref_tree(struct btrfs_fs_info *fs_info);
void btrfs_free_ref_cache(struct btrfs_fs_info *fs_info);
int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
u64 parent, u64 ref_root, u64 owner, u64 offset,
int action);
int btrfs_ref_tree_mod(struct btrfs_fs_info *fs_info,
struct btrfs_ref *generic_ref);
void btrfs_free_ref_tree_range(struct btrfs_fs_info *fs_info, u64 start,
u64 len);
@ -30,9 +29,8 @@ static inline void btrfs_free_ref_cache(struct btrfs_fs_info *fs_info)
{
}
static inline int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr,
u64 num_bytes, u64 parent, u64 ref_root,
u64 owner, u64 offset, int action)
static inline int btrfs_ref_tree_mod(struct btrfs_fs_info *fs_info,
struct btrfs_ref *generic_ref)
{
return 0;
}

127
fs/btrfs/relocation.c
View file

@ -1643,6 +1643,8 @@ int replace_file_extents(struct btrfs_trans_handle *trans,
nritems = btrfs_header_nritems(leaf);
for (i = 0; i < nritems; i++) {
struct btrfs_ref ref = { 0 };
cond_resched();
btrfs_item_key_to_cpu(leaf, &key, i);
if (key.type != BTRFS_EXTENT_DATA_KEY)
@ -1703,18 +1705,23 @@ int replace_file_extents(struct btrfs_trans_handle *trans,
dirty = 1;
key.offset -= btrfs_file_extent_offset(leaf, fi);
ret = btrfs_inc_extent_ref(trans, root, new_bytenr,
num_bytes, parent,
btrfs_header_owner(leaf),
key.objectid, key.offset);
btrfs_init_generic_ref(&ref, BTRFS_ADD_DELAYED_REF, new_bytenr,
num_bytes, parent);
ref.real_root = root->root_key.objectid;
btrfs_init_data_ref(&ref, btrfs_header_owner(leaf),
key.objectid, key.offset);
ret = btrfs_inc_extent_ref(trans, &ref);
if (ret) {
btrfs_abort_transaction(trans, ret);
break;
}
ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
parent, btrfs_header_owner(leaf),
key.objectid, key.offset);
btrfs_init_generic_ref(&ref, BTRFS_DROP_DELAYED_REF, bytenr,
num_bytes, parent);
ref.real_root = root->root_key.objectid;
btrfs_init_data_ref(&ref, btrfs_header_owner(leaf),
key.objectid, key.offset);
ret = btrfs_free_extent(trans, &ref);
if (ret) {
btrfs_abort_transaction(trans, ret);
break;
@ -1756,6 +1763,7 @@ int replace_path(struct btrfs_trans_handle *trans, struct reloc_control *rc,
struct btrfs_fs_info *fs_info = dest->fs_info;
struct extent_buffer *eb;
struct extent_buffer *parent;
struct btrfs_ref ref = { 0 };
struct btrfs_key key;
u64 old_bytenr;
u64 new_bytenr;
@ -1916,23 +1924,31 @@ again:
path->slots[level], old_ptr_gen);
btrfs_mark_buffer_dirty(path->nodes[level]);
ret = btrfs_inc_extent_ref(trans, src, old_bytenr,
blocksize, path->nodes[level]->start,
src->root_key.objectid, level - 1, 0);
btrfs_init_generic_ref(&ref, BTRFS_ADD_DELAYED_REF, old_bytenr,
blocksize, path->nodes[level]->start);
ref.skip_qgroup = true;
btrfs_init_tree_ref(&ref, level - 1, src->root_key.objectid);
ret = btrfs_inc_extent_ref(trans, &ref);
BUG_ON(ret);
ret = btrfs_inc_extent_ref(trans, dest, new_bytenr,
blocksize, 0, dest->root_key.objectid,
level - 1, 0);
btrfs_init_generic_ref(&ref, BTRFS_ADD_DELAYED_REF, new_bytenr,
blocksize, 0);
ref.skip_qgroup = true;
btrfs_init_tree_ref(&ref, level - 1, dest->root_key.objectid);
ret = btrfs_inc_extent_ref(trans, &ref);
BUG_ON(ret);
ret = btrfs_free_extent(trans, src, new_bytenr, blocksize,
path->nodes[level]->start,
src->root_key.objectid, level - 1, 0);
btrfs_init_generic_ref(&ref, BTRFS_DROP_DELAYED_REF, new_bytenr,
blocksize, path->nodes[level]->start);
btrfs_init_tree_ref(&ref, level - 1, src->root_key.objectid);
ref.skip_qgroup = true;
ret = btrfs_free_extent(trans, &ref);
BUG_ON(ret);
ret = btrfs_free_extent(trans, dest, old_bytenr, blocksize,
0, dest->root_key.objectid, level - 1,
0);
btrfs_init_generic_ref(&ref, BTRFS_DROP_DELAYED_REF, old_bytenr,
blocksize, 0);
btrfs_init_tree_ref(&ref, level - 1, dest->root_key.objectid);
ref.skip_qgroup = true;
ret = btrfs_free_extent(trans, &ref);
BUG_ON(ret);
btrfs_unlock_up_safe(path, 0);
@ -2721,6 +2737,7 @@ static int do_relocation(struct btrfs_trans_handle *trans,
rc->backref_cache.path[node->level] = node;
list_for_each_entry(edge, &node->upper, list[LOWER]) {
struct btrfs_key first_key;
struct btrfs_ref ref = { 0 };
cond_resched();
@ -2826,11 +2843,13 @@ static int do_relocation(struct btrfs_trans_handle *trans,
trans->transid);
btrfs_mark_buffer_dirty(upper->eb);
ret = btrfs_inc_extent_ref(trans, root,
node->eb->start, blocksize,
upper->eb->start,
btrfs_header_owner(upper->eb),
node->level, 0);
btrfs_init_generic_ref(&ref, BTRFS_ADD_DELAYED_REF,
node->eb->start, blocksize,
upper->eb->start);
ref.real_root = root->root_key.objectid;
btrfs_init_tree_ref(&ref, node->level,
btrfs_header_owner(upper->eb));
ret = btrfs_inc_extent_ref(trans, &ref);
BUG_ON(ret);
ret = btrfs_drop_subtree(trans, root, eb, upper->eb);
@ -4222,7 +4241,7 @@ out:
return inode;
}
static struct reloc_control *alloc_reloc_control(void)
static struct reloc_control *alloc_reloc_control(struct btrfs_fs_info *fs_info)
{
struct reloc_control *rc;
@ -4234,7 +4253,8 @@ static struct reloc_control *alloc_reloc_control(void)
INIT_LIST_HEAD(&rc->dirty_subvol_roots);
backref_cache_init(&rc->backref_cache);
mapping_tree_init(&rc->reloc_root_tree);
extent_io_tree_init(&rc->processed_blocks, NULL);
extent_io_tree_init(fs_info, &rc->processed_blocks,
IO_TREE_RELOC_BLOCKS, NULL);
return rc;
}
@ -4276,7 +4296,7 @@ int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start)
return -ETXTBSY;
}
rc = alloc_reloc_control();
rc = alloc_reloc_control(fs_info);
if (!rc) {
btrfs_put_block_group(bg);
return -ENOMEM;
@ -4298,7 +4318,7 @@ int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start)
goto out;
}
inode = lookup_free_space_inode(fs_info, rc->block_group, path);
inode = lookup_free_space_inode(rc->block_group, path);
btrfs_free_path(path);
if (!IS_ERR(inode))
@ -4330,27 +4350,36 @@ int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start)
mutex_lock(&fs_info->cleaner_mutex);
ret = relocate_block_group(rc);
mutex_unlock(&fs_info->cleaner_mutex);
if (ret < 0) {
if (ret < 0)
err = ret;
goto out;
/*
* We may have gotten ENOSPC after we already dirtied some
* extents. If writeout happens while we're relocating a
* different block group we could end up hitting the
* BUG_ON(rc->stage == UPDATE_DATA_PTRS) in
* btrfs_reloc_cow_block. Make sure we write everything out
* properly so we don't trip over this problem, and then break
* out of the loop if we hit an error.
*/
if (rc->stage == MOVE_DATA_EXTENTS && rc->found_file_extent) {
ret = btrfs_wait_ordered_range(rc->data_inode, 0,
(u64)-1);
if (ret)
err = ret;
invalidate_mapping_pages(rc->data_inode->i_mapping,
0, -1);
rc->stage = UPDATE_DATA_PTRS;
}
if (err < 0)
goto out;
if (rc->extents_found == 0)
break;
btrfs_info(fs_info, "found %llu extents", rc->extents_found);
if (rc->stage == MOVE_DATA_EXTENTS && rc->found_file_extent) {
ret = btrfs_wait_ordered_range(rc->data_inode, 0,
(u64)-1);
if (ret) {
err = ret;
goto out;
}
invalidate_mapping_pages(rc->data_inode->i_mapping,
0, -1);
rc->stage = UPDATE_DATA_PTRS;
}
}
WARN_ON(rc->block_group->pinned > 0);
@ -4472,7 +4501,7 @@ int btrfs_recover_relocation(struct btrfs_root *root)
if (list_empty(&reloc_roots))
goto out;
rc = alloc_reloc_control();
rc = alloc_reloc_control(fs_info);
if (!rc) {
err = -ENOMEM;
goto out;
@ -4594,7 +4623,7 @@ int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len)
new_bytenr = ordered->start + (sums->bytenr - disk_bytenr);
sums->bytenr = new_bytenr;
btrfs_add_ordered_sum(inode, ordered, sums);
btrfs_add_ordered_sum(ordered, sums);
}
out:
btrfs_put_ordered_extent(ordered);
@ -4667,14 +4696,12 @@ int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
u64 *bytes_to_reserve)
{
struct btrfs_root *root;
struct reloc_control *rc;
struct btrfs_root *root = pending->root;
struct reloc_control *rc = root->fs_info->reloc_ctl;
root = pending->root;
if (!root->reloc_root)
if (!root->reloc_root || !rc)
return;
rc = root->fs_info->reloc_ctl;
if (!rc->merge_reloc_tree)
return;
@ -4703,10 +4730,10 @@ int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
struct btrfs_root *root = pending->root;
struct btrfs_root *reloc_root;
struct btrfs_root *new_root;
struct reloc_control *rc;
struct reloc_control *rc = root->fs_info->reloc_ctl;
int ret;
if (!root->reloc_root)
if (!root->reloc_root || !rc)
return 0;
rc = root->fs_info->reloc_ctl;

13
fs/btrfs/root-tree.c
View file

@ -137,11 +137,14 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
goto out;
}
if (ret != 0) {
btrfs_print_leaf(path->nodes[0]);
btrfs_crit(fs_info, "unable to update root key %llu %u %llu",
key->objectid, key->type, key->offset);
BUG_ON(1);
if (ret > 0) {
btrfs_crit(fs_info,
"unable to find root key (%llu %u %llu) in tree %llu",
key->objectid, key->type, key->offset,
root->root_key.objectid);
ret = -EUCLEAN;
btrfs_abort_transaction(trans, ret);
goto out;
}
l = path->nodes[0];

6
fs/btrfs/scrub.c
View file

@ -3791,7 +3791,7 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
struct btrfs_workqueue *scrub_parity = NULL;
if (btrfs_fs_closing(fs_info))
return -EINVAL;
return -EAGAIN;
if (fs_info->nodesize > BTRFS_STRIPE_LEN) {
/*
@ -3999,9 +3999,9 @@ int btrfs_scrub_cancel(struct btrfs_fs_info *fs_info)
return 0;
}
int btrfs_scrub_cancel_dev(struct btrfs_fs_info *fs_info,
struct btrfs_device *dev)
int btrfs_scrub_cancel_dev(struct btrfs_device *dev)
{
struct btrfs_fs_info *fs_info = dev->fs_info;
struct scrub_ctx *sctx;
mutex_lock(&fs_info->scrub_lock);

114
fs/btrfs/send.c
View file

@ -1160,7 +1160,6 @@ out:
struct backref_ctx {
struct send_ctx *sctx;
struct btrfs_path *path;
/* number of total found references */
u64 found;
@ -1213,8 +1212,6 @@ static int __iterate_backrefs(u64 ino, u64 offset, u64 root, void *ctx_)
{
struct backref_ctx *bctx = ctx_;
struct clone_root *found;
int ret;
u64 i_size;
/* First check if the root is in the list of accepted clone sources */
found = bsearch((void *)(uintptr_t)root, bctx->sctx->clone_roots,
@ -1230,19 +1227,6 @@ static int __iterate_backrefs(u64 ino, u64 offset, u64 root, void *ctx_)
bctx->found_itself = 1;
}
/*
* There are inodes that have extents that lie behind its i_size. Don't
* accept clones from these extents.
*/
ret = __get_inode_info(found->root, bctx->path, ino, &i_size, NULL, NULL,
NULL, NULL, NULL);
btrfs_release_path(bctx->path);
if (ret < 0)
return ret;
if (offset + bctx->data_offset + bctx->extent_len > i_size)
return 0;
/*
* Make sure we don't consider clones from send_root that are
* behind the current inode/offset.
@ -1319,8 +1303,6 @@ static int find_extent_clone(struct send_ctx *sctx,
goto out;
}
backref_ctx->path = tmp_path;
if (data_offset >= ino_size) {
/*
* There may be extents that lie behind the file's size.
@ -5082,6 +5064,7 @@ static int clone_range(struct send_ctx *sctx,
struct btrfs_path *path;
struct btrfs_key key;
int ret;
u64 clone_src_i_size;
/*
* Prevent cloning from a zero offset with a length matching the sector
@ -5106,6 +5089,16 @@ static int clone_range(struct send_ctx *sctx,
if (!path)
return -ENOMEM;
/*
* There are inodes that have extents that lie behind its i_size. Don't
* accept clones from these extents.
*/
ret = __get_inode_info(clone_root->root, path, clone_root->ino,
&clone_src_i_size, NULL, NULL, NULL, NULL, NULL);
btrfs_release_path(path);
if (ret < 0)
goto out;
/*
* We can't send a clone operation for the entire range if we find
* extent items in the respective range in the source file that
@ -5148,6 +5141,7 @@ static int clone_range(struct send_ctx *sctx,
u8 type;
u64 ext_len;
u64 clone_len;
u64 clone_data_offset;
if (slot >= btrfs_header_nritems(leaf)) {
ret = btrfs_next_leaf(clone_root->root, path);
@ -5201,10 +5195,30 @@ static int clone_range(struct send_ctx *sctx,
if (key.offset >= clone_root->offset + len)
break;
if (key.offset >= clone_src_i_size)
break;
if (key.offset + ext_len > clone_src_i_size)
ext_len = clone_src_i_size - key.offset;
clone_data_offset = btrfs_file_extent_offset(leaf, ei);
if (btrfs_file_extent_disk_bytenr(leaf, ei) == disk_byte) {
clone_root->offset = key.offset;
if (clone_data_offset < data_offset &&
clone_data_offset + ext_len > data_offset) {
u64 extent_offset;
extent_offset = data_offset - clone_data_offset;
ext_len -= extent_offset;
clone_data_offset += extent_offset;
clone_root->offset += extent_offset;
}
}
clone_len = min_t(u64, ext_len, len);
if (btrfs_file_extent_disk_bytenr(leaf, ei) == disk_byte &&
btrfs_file_extent_offset(leaf, ei) == data_offset)
clone_data_offset == data_offset)
ret = send_clone(sctx, offset, clone_len, clone_root);
else
ret = send_extent_data(sctx, offset, clone_len);
@ -6579,6 +6593,38 @@ commit_trans:
return btrfs_commit_transaction(trans);
}
/*
* Make sure any existing dellaloc is flushed for any root used by a send
* operation so that we do not miss any data and we do not race with writeback
* finishing and changing a tree while send is using the tree. This could
* happen if a subvolume is in RW mode, has delalloc, is turned to RO mode and
* a send operation then uses the subvolume.
* After flushing delalloc ensure_commit_roots_uptodate() must be called.
*/
static int flush_delalloc_roots(struct send_ctx *sctx)
{
struct btrfs_root *root = sctx->parent_root;
int ret;
int i;
if (root) {
ret = btrfs_start_delalloc_snapshot(root);
if (ret)
return ret;
btrfs_wait_ordered_extents(root, U64_MAX, 0, U64_MAX);
}
for (i = 0; i < sctx->clone_roots_cnt; i++) {
root = sctx->clone_roots[i].root;
ret = btrfs_start_delalloc_snapshot(root);
if (ret)
return ret;
btrfs_wait_ordered_extents(root, U64_MAX, 0, U64_MAX);
}
return 0;
}
static void btrfs_root_dec_send_in_progress(struct btrfs_root* root)
{
spin_lock(&root->root_item_lock);
@ -6594,6 +6640,13 @@ static void btrfs_root_dec_send_in_progress(struct btrfs_root* root)
spin_unlock(&root->root_item_lock);
}
static void dedupe_in_progress_warn(const struct btrfs_root *root)
{
btrfs_warn_rl(root->fs_info,
"cannot use root %llu for send while deduplications on it are in progress (%d in progress)",
root->root_key.objectid, root->dedupe_in_progress);
}
long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
{
int ret = 0;
@ -6617,6 +6670,11 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
* making it RW. This also protects against deletion.
*/
spin_lock(&send_root->root_item_lock);
if (btrfs_root_readonly(send_root) && send_root->dedupe_in_progress) {
dedupe_in_progress_warn(send_root);
spin_unlock(&send_root->root_item_lock);
return -EAGAIN;
}
send_root->send_in_progress++;
spin_unlock(&send_root->root_item_lock);
@ -6751,6 +6809,13 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
ret = -EPERM;
goto out;
}
if (clone_root->dedupe_in_progress) {
dedupe_in_progress_warn(clone_root);
spin_unlock(&clone_root->root_item_lock);
srcu_read_unlock(&fs_info->subvol_srcu, index);
ret = -EAGAIN;
goto out;
}
clone_root->send_in_progress++;
spin_unlock(&clone_root->root_item_lock);
srcu_read_unlock(&fs_info->subvol_srcu, index);
@ -6785,6 +6850,13 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
ret = -EPERM;
goto out;
}
if (sctx->parent_root->dedupe_in_progress) {
dedupe_in_progress_warn(sctx->parent_root);
spin_unlock(&sctx->parent_root->root_item_lock);
srcu_read_unlock(&fs_info->subvol_srcu, index);
ret = -EAGAIN;
goto out;
}
spin_unlock(&sctx->parent_root->root_item_lock);
srcu_read_unlock(&fs_info->subvol_srcu, index);
@ -6803,6 +6875,10 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
NULL);
sort_clone_roots = 1;
ret = flush_delalloc_roots(sctx);
if (ret)
goto out;
ret = ensure_commit_roots_uptodate(sctx);
if (ret)
goto out;

4
fs/btrfs/super.c
View file

@ -1400,7 +1400,7 @@ static inline int is_subvolume_inode(struct inode *inode)
}
static struct dentry *mount_subvol(const char *subvol_name, u64 subvol_objectid,
const char *device_name, struct vfsmount *mnt)
struct vfsmount *mnt)
{
struct dentry *root;
int ret;
@ -1649,7 +1649,7 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
}
/* mount_subvol() will free subvol_name and mnt_root */
root = mount_subvol(subvol_name, subvol_objectid, device_name, mnt_root);
root = mount_subvol(subvol_name, subvol_objectid, mnt_root);
out:
return root;

17
fs/btrfs/tests/btrfs-tests.c
View file

@ -17,6 +17,16 @@
static struct vfsmount *test_mnt = NULL;
const char *test_error[] = {
[TEST_ALLOC_FS_INFO] = "cannot allocate fs_info",
[TEST_ALLOC_ROOT] = "cannot allocate root",
[TEST_ALLOC_EXTENT_BUFFER] = "cannot extent buffer",
[TEST_ALLOC_PATH] = "cannot allocate path",
[TEST_ALLOC_INODE] = "cannot allocate inode",
[TEST_ALLOC_BLOCK_GROUP] = "cannot allocate block group",
[TEST_ALLOC_EXTENT_MAP] = "cannot allocate extent map",
};
static const struct super_operations btrfs_test_super_ops = {
.alloc_inode = btrfs_alloc_inode,
.destroy_inode = btrfs_test_destroy_inode,
@ -99,7 +109,6 @@ struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
spin_lock_init(&fs_info->buffer_lock);
spin_lock_init(&fs_info->qgroup_lock);
spin_lock_init(&fs_info->qgroup_op_lock);
spin_lock_init(&fs_info->super_lock);
spin_lock_init(&fs_info->fs_roots_radix_lock);
spin_lock_init(&fs_info->tree_mod_seq_lock);
@ -115,8 +124,10 @@ struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
extent_io_tree_init(&fs_info->freed_extents[0], NULL);
extent_io_tree_init(&fs_info->freed_extents[1], NULL);
extent_io_tree_init(fs_info, &fs_info->freed_extents[0],
IO_TREE_FS_INFO_FREED_EXTENTS0, NULL);
extent_io_tree_init(fs_info, &fs_info->freed_extents[1],
IO_TREE_FS_INFO_FREED_EXTENTS1, NULL);
fs_info->pinned_extents = &fs_info->freed_extents[0];
set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);

17
fs/btrfs/tests/btrfs-tests.h
View file

@ -10,7 +10,22 @@
int btrfs_run_sanity_tests(void);
#define test_msg(fmt, ...) pr_info("BTRFS: selftest: " fmt "\n", ##__VA_ARGS__)
#define test_err(fmt, ...) pr_err("BTRFS: selftest: " fmt "\n", ##__VA_ARGS__)
#define test_err(fmt, ...) pr_err("BTRFS: selftest: %s:%d " fmt "\n", \
__FILE__, __LINE__, ##__VA_ARGS__)
#define test_std_err(index) test_err("%s", test_error[index])
enum {
TEST_ALLOC_FS_INFO,
TEST_ALLOC_ROOT,
TEST_ALLOC_EXTENT_BUFFER,
TEST_ALLOC_PATH,
TEST_ALLOC_INODE,
TEST_ALLOC_BLOCK_GROUP,
TEST_ALLOC_EXTENT_MAP,
};
extern const char *test_error[];
struct btrfs_root;
struct btrfs_trans_handle;

8
fs/btrfs/tests/extent-buffer-tests.c
View file

@ -30,27 +30,27 @@ static int test_btrfs_split_item(u32 sectorsize, u32 nodesize)
fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
if (!fs_info) {
test_err("could not allocate fs_info");
test_std_err(TEST_ALLOC_FS_INFO);
return -ENOMEM;
}
root = btrfs_alloc_dummy_root(fs_info);
if (IS_ERR(root)) {
test_err("could not allocate root");
test_std_err(TEST_ALLOC_ROOT);
ret = PTR_ERR(root);
goto out;
}
path = btrfs_alloc_path();
if (!path) {
test_err("could not allocate path");
test_std_err(TEST_ALLOC_PATH);
ret = -ENOMEM;
goto out;
}
path->nodes[0] = eb = alloc_dummy_extent_buffer(fs_info, nodesize);
if (!eb) {
test_err("could not allocate dummy buffer");
test_std_err(TEST_ALLOC_EXTENT_BUFFER);
ret = -ENOMEM;
goto out;
}

35
fs/btrfs/tests/extent-io-tests.c
View file

@ -73,11 +73,15 @@ static int test_find_delalloc(u32 sectorsize)
inode = btrfs_new_test_inode();
if (!inode) {
test_err("failed to allocate test inode");
test_std_err(TEST_ALLOC_INODE);
return -ENOMEM;
}
extent_io_tree_init(&tmp, NULL);
/*
* Passing NULL as we don't have fs_info but tracepoints are not used
* at this point
*/
extent_io_tree_init(NULL, &tmp, IO_TREE_SELFTEST, NULL);
/*
* First go through and create and mark all of our pages dirty, we pin
@ -374,8 +378,8 @@ static int test_eb_bitmaps(u32 sectorsize, u32 nodesize)
{
struct btrfs_fs_info *fs_info;
unsigned long len;
unsigned long *bitmap;
struct extent_buffer *eb;
unsigned long *bitmap = NULL;
struct extent_buffer *eb = NULL;
int ret;
test_msg("running extent buffer bitmap tests");
@ -388,18 +392,23 @@ static int test_eb_bitmaps(u32 sectorsize, u32 nodesize)
? sectorsize * 4 : sectorsize;
fs_info = btrfs_alloc_dummy_fs_info(len, len);
if (!fs_info) {
test_std_err(TEST_ALLOC_FS_INFO);
return -ENOMEM;
}
bitmap = kmalloc(len, GFP_KERNEL);
if (!bitmap) {
test_err("couldn't allocate test bitmap");
return -ENOMEM;
ret = -ENOMEM;
goto out;
}
eb = __alloc_dummy_extent_buffer(fs_info, 0, len);
if (!eb) {
test_err("couldn't allocate test extent buffer");
kfree(bitmap);
return -ENOMEM;
test_std_err(TEST_ALLOC_ROOT);
ret = -ENOMEM;
goto out;
}
ret = __test_eb_bitmaps(bitmap, eb, len);
@ -408,17 +417,18 @@ static int test_eb_bitmaps(u32 sectorsize, u32 nodesize)
/* Do it over again with an extent buffer which isn't page-aligned. */
free_extent_buffer(eb);
eb = __alloc_dummy_extent_buffer(NULL, nodesize / 2, len);
eb = __alloc_dummy_extent_buffer(fs_info, nodesize / 2, len);
if (!eb) {
test_err("couldn't allocate test extent buffer");
kfree(bitmap);
return -ENOMEM;
test_std_err(TEST_ALLOC_ROOT);
ret = -ENOMEM;
goto out;
}
ret = __test_eb_bitmaps(bitmap, eb, len);
out:
free_extent_buffer(eb);
kfree(bitmap);
btrfs_free_dummy_fs_info(fs_info);
return ret;
}
@ -434,6 +444,5 @@ int btrfs_test_extent_io(u32 sectorsize, u32 nodesize)
ret = test_eb_bitmaps(sectorsize, nodesize);
out:
test_msg("extent I/O tests finished");
return ret;
}

213
fs/btrfs/tests/extent-map-tests.c
View file

@ -47,7 +47,7 @@ static void free_extent_map_tree(struct extent_map_tree *em_tree)
* ->add_extent_mapping(0, 16K)
* -> #handle -EEXIST
*/
static void test_case_1(struct btrfs_fs_info *fs_info,
static int test_case_1(struct btrfs_fs_info *fs_info,
struct extent_map_tree *em_tree)
{
struct extent_map *em;
@ -56,9 +56,10 @@ static void test_case_1(struct btrfs_fs_info *fs_info,
int ret;
em = alloc_extent_map();
if (!em)
/* Skip the test on error. */
return;
if (!em) {
test_std_err(TEST_ALLOC_EXTENT_MAP);
return -ENOMEM;
}
/* Add [0, 16K) */
em->start = 0;
@ -66,25 +67,37 @@ static void test_case_1(struct btrfs_fs_info *fs_info,
em->block_start = 0;
em->block_len = SZ_16K;
ret = add_extent_mapping(em_tree, em, 0);
ASSERT(ret == 0);
if (ret < 0) {
test_err("cannot add extent range [0, 16K)");
goto out;
}
free_extent_map(em);
/* Add [16K, 20K) following [0, 16K) */
em = alloc_extent_map();
if (!em)
if (!em) {
test_std_err(TEST_ALLOC_EXTENT_MAP);
ret = -ENOMEM;
goto out;
}
em->start = SZ_16K;
em->len = SZ_4K;
em->block_start = SZ_32K; /* avoid merging */
em->block_len = SZ_4K;
ret = add_extent_mapping(em_tree, em, 0);
ASSERT(ret == 0);
if (ret < 0) {
test_err("cannot add extent range [16K, 20K)");
goto out;
}
free_extent_map(em);
em = alloc_extent_map();
if (!em)
if (!em) {
test_std_err(TEST_ALLOC_EXTENT_MAP);
ret = -ENOMEM;
goto out;
}
/* Add [0, 8K), should return [0, 16K) instead. */
em->start = start;
@ -92,19 +105,24 @@ static void test_case_1(struct btrfs_fs_info *fs_info,
em->block_start = start;
em->block_len = len;
ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
if (ret)
if (ret) {
test_err("case1 [%llu %llu]: ret %d", start, start + len, ret);
goto out;
}
if (em &&
(em->start != 0 || extent_map_end(em) != SZ_16K ||
em->block_start != 0 || em->block_len != SZ_16K))
em->block_start != 0 || em->block_len != SZ_16K)) {
test_err(
"case1 [%llu %llu]: ret %d return a wrong em (start %llu len %llu block_start %llu block_len %llu",
start, start + len, ret, em->start, em->len,
em->block_start, em->block_len);
ret = -EINVAL;
}
free_extent_map(em);
out:
/* free memory */
free_extent_map_tree(em_tree);
return ret;
}
/*
@ -113,16 +131,17 @@ out:
* Reading the inline ending up with EEXIST, ie. read an inline
* extent and discard page cache and read it again.
*/
static void test_case_2(struct btrfs_fs_info *fs_info,
static int test_case_2(struct btrfs_fs_info *fs_info,
struct extent_map_tree *em_tree)
{
struct extent_map *em;
int ret;
em = alloc_extent_map();
if (!em)
/* Skip the test on error. */
return;
if (!em) {
test_std_err(TEST_ALLOC_EXTENT_MAP);
return -ENOMEM;
}
/* Add [0, 1K) */
em->start = 0;
@ -130,25 +149,37 @@ static void test_case_2(struct btrfs_fs_info *fs_info,
em->block_start = EXTENT_MAP_INLINE;
em->block_len = (u64)-1;
ret = add_extent_mapping(em_tree, em, 0);
ASSERT(ret == 0);
if (ret < 0) {
test_err("cannot add extent range [0, 1K)");
goto out;
}
free_extent_map(em);
/* Add [4K, 4K) following [0, 1K) */
/* Add [4K, 8K) following [0, 1K) */
em = alloc_extent_map();
if (!em)
if (!em) {
test_std_err(TEST_ALLOC_EXTENT_MAP);
ret = -ENOMEM;
goto out;
}
em->start = SZ_4K;
em->len = SZ_4K;
em->block_start = SZ_4K;
em->block_len = SZ_4K;
ret = add_extent_mapping(em_tree, em, 0);
ASSERT(ret == 0);
if (ret < 0) {
test_err("cannot add extent range [4K, 8K)");
goto out;
}
free_extent_map(em);
em = alloc_extent_map();
if (!em)
if (!em) {
test_std_err(TEST_ALLOC_EXTENT_MAP);
ret = -ENOMEM;
goto out;
}
/* Add [0, 1K) */
em->start = 0;
@ -156,22 +187,27 @@ static void test_case_2(struct btrfs_fs_info *fs_info,
em->block_start = EXTENT_MAP_INLINE;
em->block_len = (u64)-1;
ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
if (ret)
if (ret) {
test_err("case2 [0 1K]: ret %d", ret);
goto out;
}
if (em &&
(em->start != 0 || extent_map_end(em) != SZ_1K ||
em->block_start != EXTENT_MAP_INLINE || em->block_len != (u64)-1))
em->block_start != EXTENT_MAP_INLINE || em->block_len != (u64)-1)) {
test_err(
"case2 [0 1K]: ret %d return a wrong em (start %llu len %llu block_start %llu block_len %llu",
ret, em->start, em->len, em->block_start,
em->block_len);
ret = -EINVAL;
}
free_extent_map(em);
out:
/* free memory */
free_extent_map_tree(em_tree);
return ret;
}
static void __test_case_3(struct btrfs_fs_info *fs_info,
static int __test_case_3(struct btrfs_fs_info *fs_info,
struct extent_map_tree *em_tree, u64 start)
{
struct extent_map *em;
@ -179,9 +215,10 @@ static void __test_case_3(struct btrfs_fs_info *fs_info,
int ret;
em = alloc_extent_map();
if (!em)
/* Skip this test on error. */
return;
if (!em) {
test_std_err(TEST_ALLOC_EXTENT_MAP);
return -ENOMEM;
}
/* Add [4K, 8K) */
em->start = SZ_4K;
@ -189,12 +226,18 @@ static void __test_case_3(struct btrfs_fs_info *fs_info,
em->block_start = SZ_4K;
em->block_len = SZ_4K;
ret = add_extent_mapping(em_tree, em, 0);
ASSERT(ret == 0);
if (ret < 0) {
test_err("cannot add extent range [4K, 8K)");
goto out;
}
free_extent_map(em);
em = alloc_extent_map();
if (!em)
if (!em) {
test_std_err(TEST_ALLOC_EXTENT_MAP);
ret = -ENOMEM;
goto out;
}
/* Add [0, 16K) */
em->start = 0;
@ -202,24 +245,29 @@ static void __test_case_3(struct btrfs_fs_info *fs_info,
em->block_start = 0;
em->block_len = SZ_16K;
ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, start, len);
if (ret)
if (ret) {
test_err("case3 [0x%llx 0x%llx): ret %d",
start, start + len, ret);
goto out;
}
/*
* Since bytes within em are contiguous, em->block_start is identical to
* em->start.
*/
if (em &&
(start < em->start || start + len > extent_map_end(em) ||
em->start != em->block_start || em->len != em->block_len))
em->start != em->block_start || em->len != em->block_len)) {
test_err(
"case3 [0x%llx 0x%llx): ret %d em (start 0x%llx len 0x%llx block_start 0x%llx block_len 0x%llx)",
start, start + len, ret, em->start, em->len,
em->block_start, em->block_len);
ret = -EINVAL;
}
free_extent_map(em);
out:
/* free memory */
free_extent_map_tree(em_tree);
return ret;
}
/*
@ -238,15 +286,23 @@ out:
* -> add_extent_mapping()
* -> add_extent_mapping()
*/
static void test_case_3(struct btrfs_fs_info *fs_info,
static int test_case_3(struct btrfs_fs_info *fs_info,
struct extent_map_tree *em_tree)
{
__test_case_3(fs_info, em_tree, 0);
__test_case_3(fs_info, em_tree, SZ_8K);
__test_case_3(fs_info, em_tree, (12 * 1024ULL));
int ret;
ret = __test_case_3(fs_info, em_tree, 0);
if (ret)
return ret;
ret = __test_case_3(fs_info, em_tree, SZ_8K);
if (ret)
return ret;
ret = __test_case_3(fs_info, em_tree, (12 * SZ_1K));
return ret;
}
static void __test_case_4(struct btrfs_fs_info *fs_info,
static int __test_case_4(struct btrfs_fs_info *fs_info,
struct extent_map_tree *em_tree, u64 start)
{
struct extent_map *em;
@ -254,9 +310,10 @@ static void __test_case_4(struct btrfs_fs_info *fs_info,
int ret;
em = alloc_extent_map();
if (!em)
/* Skip this test on error. */
return;
if (!em) {
test_std_err(TEST_ALLOC_EXTENT_MAP);
return -ENOMEM;
}
/* Add [0K, 8K) */
em->start = 0;
@ -264,44 +321,60 @@ static void __test_case_4(struct btrfs_fs_info *fs_info,
em->block_start = 0;
em->block_len = SZ_8K;
ret = add_extent_mapping(em_tree, em, 0);
ASSERT(ret == 0);
if (ret < 0) {
test_err("cannot add extent range [0, 8K)");
goto out;
}
free_extent_map(em);
em = alloc_extent_map();
if (!em)
if (!em) {
test_std_err(TEST_ALLOC_EXTENT_MAP);
ret = -ENOMEM;
goto out;
}
/* Add [8K, 24K) */
/* Add [8K, 32K) */
em->start = SZ_8K;
em->len = 24 * 1024ULL;
em->len = 24 * SZ_1K;
em->block_start = SZ_16K; /* avoid merging */
em->block_len = 24 * 1024ULL;
em->block_len = 24 * SZ_1K;
ret = add_extent_mapping(em_tree, em, 0);
ASSERT(ret == 0);
if (ret < 0) {
test_err("cannot add extent range [8K, 32K)");
goto out;
}
free_extent_map(em);
em = alloc_extent_map();
if (!em)
if (!em) {
test_std_err(TEST_ALLOC_EXTENT_MAP);
ret = -ENOMEM;
goto out;
}
/* Add [0K, 32K) */
em->start = 0;
em->len = SZ_32K;
em->block_start = 0;
em->block_len = SZ_32K;
ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, start, len);
if (ret)
if (ret) {
test_err("case4 [0x%llx 0x%llx): ret %d",
start, len, ret);
if (em &&
(start < em->start || start + len > extent_map_end(em)))
goto out;
}
if (em && (start < em->start || start + len > extent_map_end(em))) {
test_err(
"case4 [0x%llx 0x%llx): ret %d, added wrong em (start 0x%llx len 0x%llx block_start 0x%llx block_len 0x%llx)",
start, len, ret, em->start, em->len, em->block_start,
em->block_len);
ret = -EINVAL;
}
free_extent_map(em);
out:
/* free memory */
free_extent_map_tree(em_tree);
return ret;
}
/*
@ -329,17 +402,24 @@ out:
* # handle -EEXIST when adding
* # [0, 32K)
*/
static void test_case_4(struct btrfs_fs_info *fs_info,
static int test_case_4(struct btrfs_fs_info *fs_info,
struct extent_map_tree *em_tree)
{
__test_case_4(fs_info, em_tree, 0);
__test_case_4(fs_info, em_tree, SZ_4K);
int ret;
ret = __test_case_4(fs_info, em_tree, 0);
if (ret)
return ret;
ret = __test_case_4(fs_info, em_tree, SZ_4K);
return ret;
}
int btrfs_test_extent_map(void)
{
struct btrfs_fs_info *fs_info = NULL;
struct extent_map_tree *em_tree;
int ret = 0;
test_msg("running extent_map tests");
@ -349,25 +429,32 @@ int btrfs_test_extent_map(void)
*/
fs_info = btrfs_alloc_dummy_fs_info(PAGE_SIZE, PAGE_SIZE);
if (!fs_info) {
test_msg("Couldn't allocate dummy fs info");
test_std_err(TEST_ALLOC_FS_INFO);
return -ENOMEM;
}
em_tree = kzalloc(sizeof(*em_tree), GFP_KERNEL);
if (!em_tree)
/* Skip the test on error. */
if (!em_tree) {
ret = -ENOMEM;
goto out;
}
extent_map_tree_init(em_tree);
test_case_1(fs_info, em_tree);
test_case_2(fs_info, em_tree);
test_case_3(fs_info, em_tree);
test_case_4(fs_info, em_tree);
ret = test_case_1(fs_info, em_tree);
if (ret)
goto out;
ret = test_case_2(fs_info, em_tree);
if (ret)
goto out;
ret = test_case_3(fs_info, em_tree);
if (ret)
goto out;
ret = test_case_4(fs_info, em_tree);
kfree(em_tree);
out:
kfree(em_tree);
btrfs_free_dummy_fs_info(fs_info);
return 0;
return ret;
}

11
fs/btrfs/tests/free-space-tests.c
View file

@ -404,7 +404,7 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache,
};
const struct btrfs_free_space_op *orig_free_space_ops;
test_msg("running space stealing from bitmap to extent");
test_msg("running space stealing from bitmap to extent tests");
/*
* For this test, we want to ensure we end up with an extent entry
@ -834,9 +834,10 @@ int btrfs_test_free_space_cache(u32 sectorsize, u32 nodesize)
test_msg("running btrfs free space cache tests");
fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
if (!fs_info)
if (!fs_info) {
test_std_err(TEST_ALLOC_FS_INFO);
return -ENOMEM;
}
/*
* For ppc64 (with 64k page size), bytes per bitmap might be
@ -846,13 +847,14 @@ int btrfs_test_free_space_cache(u32 sectorsize, u32 nodesize)
cache = btrfs_alloc_dummy_block_group(fs_info,
BITS_PER_BITMAP * sectorsize + PAGE_SIZE);
if (!cache) {
test_err("couldn't run the tests");
test_std_err(TEST_ALLOC_BLOCK_GROUP);
btrfs_free_dummy_fs_info(fs_info);
return 0;
}
root = btrfs_alloc_dummy_root(fs_info);
if (IS_ERR(root)) {
test_std_err(TEST_ALLOC_ROOT);
ret = PTR_ERR(root);
goto out;
}
@ -874,6 +876,5 @@ out:
btrfs_free_dummy_block_group(cache);
btrfs_free_dummy_root(root);
btrfs_free_dummy_fs_info(fs_info);
test_msg("free space cache tests finished");
return ret;
}

14
fs/btrfs/tests/free-space-tree-tests.c
View file

@ -30,7 +30,7 @@ static int __check_free_space_extents(struct btrfs_trans_handle *trans,
unsigned int i;
int ret;
info = search_free_space_info(trans, fs_info, cache, path, 0);
info = search_free_space_info(trans, cache, path, 0);
if (IS_ERR(info)) {
test_err("could not find free space info");
ret = PTR_ERR(info);
@ -115,7 +115,7 @@ static int check_free_space_extents(struct btrfs_trans_handle *trans,
u32 flags;
int ret;
info = search_free_space_info(trans, fs_info, cache, path, 0);
info = search_free_space_info(trans, cache, path, 0);
if (IS_ERR(info)) {
test_err("could not find free space info");
btrfs_release_path(path);
@ -444,14 +444,14 @@ static int run_test(test_func_t test_func, int bitmaps, u32 sectorsize,
fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
if (!fs_info) {
test_err("couldn't allocate dummy fs info");
test_std_err(TEST_ALLOC_FS_INFO);
ret = -ENOMEM;
goto out;
}
root = btrfs_alloc_dummy_root(fs_info);
if (IS_ERR(root)) {
test_err("couldn't allocate dummy root");
test_std_err(TEST_ALLOC_ROOT);
ret = PTR_ERR(root);
goto out;
}
@ -463,7 +463,7 @@ static int run_test(test_func_t test_func, int bitmaps, u32 sectorsize,
root->node = alloc_test_extent_buffer(root->fs_info, nodesize);
if (!root->node) {
test_err("couldn't allocate dummy buffer");
test_std_err(TEST_ALLOC_EXTENT_BUFFER);
ret = -ENOMEM;
goto out;
}
@ -473,7 +473,7 @@ static int run_test(test_func_t test_func, int bitmaps, u32 sectorsize,
cache = btrfs_alloc_dummy_block_group(fs_info, 8 * alignment);
if (!cache) {
test_err("couldn't allocate dummy block group cache");
test_std_err(TEST_ALLOC_BLOCK_GROUP);
ret = -ENOMEM;
goto out;
}
@ -486,7 +486,7 @@ static int run_test(test_func_t test_func, int bitmaps, u32 sectorsize,
path = btrfs_alloc_path();
if (!path) {
test_err("couldn't allocate path");
test_std_err(TEST_ALLOC_ROOT);
ret = -ENOMEM;
goto out;
}

34
fs/btrfs/tests/inode-tests.c
View file

@ -226,31 +226,34 @@ static noinline int test_btrfs_get_extent(u32 sectorsize, u32 nodesize)
u64 offset;
int ret = -ENOMEM;
test_msg("running btrfs_get_extent tests");
inode = btrfs_new_test_inode();
if (!inode) {
test_err("couldn't allocate inode");
test_std_err(TEST_ALLOC_INODE);
return ret;
}
inode->i_mode = S_IFREG;
BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
BTRFS_I(inode)->location.offset = 0;
fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
if (!fs_info) {
test_err("couldn't allocate dummy fs info");
test_std_err(TEST_ALLOC_FS_INFO);
goto out;
}
root = btrfs_alloc_dummy_root(fs_info);
if (IS_ERR(root)) {
test_err("couldn't allocate root");
test_std_err(TEST_ALLOC_ROOT);
goto out;
}
root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
if (!root->node) {
test_err("couldn't allocate dummy buffer");
test_std_err(TEST_ALLOC_ROOT);
goto out;
}
@ -827,9 +830,11 @@ static int test_hole_first(u32 sectorsize, u32 nodesize)
struct extent_map *em = NULL;
int ret = -ENOMEM;
test_msg("running hole first btrfs_get_extent test");
inode = btrfs_new_test_inode();
if (!inode) {
test_err("couldn't allocate inode");
test_std_err(TEST_ALLOC_INODE);
return ret;
}
@ -839,19 +844,19 @@ static int test_hole_first(u32 sectorsize, u32 nodesize)
fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
if (!fs_info) {
test_err("couldn't allocate dummy fs info");
test_std_err(TEST_ALLOC_FS_INFO);
goto out;
}
root = btrfs_alloc_dummy_root(fs_info);
if (IS_ERR(root)) {
test_err("couldn't allocate root");
test_std_err(TEST_ALLOC_ROOT);
goto out;
}
root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
if (!root->node) {
test_err("couldn't allocate dummy buffer");
test_std_err(TEST_ALLOC_ROOT);
goto out;
}
@ -927,21 +932,23 @@ static int test_extent_accounting(u32 sectorsize, u32 nodesize)
struct btrfs_root *root = NULL;
int ret = -ENOMEM;
test_msg("running outstanding_extents tests");
inode = btrfs_new_test_inode();
if (!inode) {
test_err("couldn't allocate inode");
test_std_err(TEST_ALLOC_INODE);
return ret;
}
fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
if (!fs_info) {
test_err("couldn't allocate dummy fs info");
test_std_err(TEST_ALLOC_FS_INFO);
goto out;
}
root = btrfs_alloc_dummy_root(fs_info);
if (IS_ERR(root)) {
test_err("couldn't allocate root");
test_std_err(TEST_ALLOC_ROOT);
goto out;
}
@ -1110,17 +1117,16 @@ int btrfs_test_inodes(u32 sectorsize, u32 nodesize)
{
int ret;
test_msg("running inode tests");
set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
test_msg("running btrfs_get_extent tests");
ret = test_btrfs_get_extent(sectorsize, nodesize);
if (ret)
return ret;
test_msg("running hole first btrfs_get_extent test");
ret = test_hole_first(sectorsize, nodesize);
if (ret)
return ret;
test_msg("running outstanding_extents tests");
return test_extent_accounting(sectorsize, nodesize);
}

20
fs/btrfs/tests/qgroup-tests.c
View file

@ -32,7 +32,7 @@ static int insert_normal_tree_ref(struct btrfs_root *root, u64 bytenr,
path = btrfs_alloc_path();
if (!path) {
test_err("couldn't allocate path");
test_std_err(TEST_ALLOC_ROOT);
return -ENOMEM;
}
@ -82,7 +82,7 @@ static int add_tree_ref(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
path = btrfs_alloc_path();
if (!path) {
test_err("couldn't allocate path");
test_std_err(TEST_ALLOC_ROOT);
return -ENOMEM;
}
@ -132,7 +132,7 @@ static int remove_extent_item(struct btrfs_root *root, u64 bytenr,
path = btrfs_alloc_path();
if (!path) {
test_err("couldn't allocate path");
test_std_err(TEST_ALLOC_ROOT);
return -ENOMEM;
}
path->leave_spinning = 1;
@ -166,7 +166,7 @@ static int remove_extent_ref(struct btrfs_root *root, u64 bytenr,
path = btrfs_alloc_path();
if (!path) {
test_err("couldn't allocate path");
test_std_err(TEST_ALLOC_ROOT);
return -ENOMEM;
}
@ -215,7 +215,7 @@ static int test_no_shared_qgroup(struct btrfs_root *root,
btrfs_init_dummy_trans(&trans, fs_info);
test_msg("qgroup basic add");
test_msg("running qgroup add/remove tests");
ret = btrfs_create_qgroup(&trans, BTRFS_FS_TREE_OBJECTID);
if (ret) {
test_err("couldn't create a qgroup %d", ret);
@ -316,7 +316,7 @@ static int test_multiple_refs(struct btrfs_root *root,
btrfs_init_dummy_trans(&trans, fs_info);
test_msg("qgroup multiple refs test");
test_msg("running qgroup multiple refs test");
/*
* We have BTRFS_FS_TREE_OBJECTID created already from the
@ -457,13 +457,13 @@ int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
if (!fs_info) {
test_err("couldn't allocate dummy fs info");
test_std_err(TEST_ALLOC_FS_INFO);
return -ENOMEM;
}
root = btrfs_alloc_dummy_root(fs_info);
if (IS_ERR(root)) {
test_err("couldn't allocate root");
test_std_err(TEST_ALLOC_ROOT);
ret = PTR_ERR(root);
goto out;
}
@ -495,7 +495,7 @@ int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
tmp_root = btrfs_alloc_dummy_root(fs_info);
if (IS_ERR(tmp_root)) {
test_err("couldn't allocate a fs root");
test_std_err(TEST_ALLOC_ROOT);
ret = PTR_ERR(tmp_root);
goto out;
}
@ -510,7 +510,7 @@ int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
tmp_root = btrfs_alloc_dummy_root(fs_info);
if (IS_ERR(tmp_root)) {
test_err("couldn't allocate a fs root");
test_std_err(TEST_ALLOC_ROOT);
ret = PTR_ERR(tmp_root);
goto out;
}

64
fs/btrfs/transaction.c
View file

@ -50,14 +50,6 @@ void btrfs_put_transaction(struct btrfs_transaction *transaction)
btrfs_err(transaction->fs_info,
"pending csums is %llu",
transaction->delayed_refs.pending_csums);
while (!list_empty(&transaction->pending_chunks)) {
struct extent_map *em;
em = list_first_entry(&transaction->pending_chunks,
struct extent_map, list);
list_del_init(&em->list);
free_extent_map(em);
}
/*
* If any block groups are found in ->deleted_bgs then it's
* because the transaction was aborted and a commit did not
@ -75,39 +67,11 @@ void btrfs_put_transaction(struct btrfs_transaction *transaction)
btrfs_put_block_group_trimming(cache);
btrfs_put_block_group(cache);
}
WARN_ON(!list_empty(&transaction->dev_update_list));
kfree(transaction);
}
}
static void clear_btree_io_tree(struct extent_io_tree *tree)
{
spin_lock(&tree->lock);
/*
* Do a single barrier for the waitqueue_active check here, the state
* of the waitqueue should not change once clear_btree_io_tree is
* called.
*/
smp_mb();
while (!RB_EMPTY_ROOT(&tree->state)) {
struct rb_node *node;
struct extent_state *state;
node = rb_first(&tree->state);
state = rb_entry(node, struct extent_state, rb_node);
rb_erase(&state->rb_node, &tree->state);
RB_CLEAR_NODE(&state->rb_node);
/*
* btree io trees aren't supposed to have tasks waiting for
* changes in the flags of extent states ever.
*/
ASSERT(!waitqueue_active(&state->wq));
free_extent_state(state);
cond_resched_lock(&tree->lock);
}
spin_unlock(&tree->lock);
}
static noinline void switch_commit_roots(struct btrfs_transaction *trans)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
@ -121,7 +85,7 @@ static noinline void switch_commit_roots(struct btrfs_transaction *trans)
root->commit_root = btrfs_root_node(root);
if (is_fstree(root->root_key.objectid))
btrfs_unpin_free_ino(root);
clear_btree_io_tree(&root->dirty_log_pages);
extent_io_tree_release(&root->dirty_log_pages);
btrfs_qgroup_clean_swapped_blocks(root);
}
@ -263,19 +227,18 @@ loop:
spin_lock_init(&cur_trans->delayed_refs.lock);
INIT_LIST_HEAD(&cur_trans->pending_snapshots);
INIT_LIST_HEAD(&cur_trans->pending_chunks);
INIT_LIST_HEAD(&cur_trans->dev_update_list);
INIT_LIST_HEAD(&cur_trans->switch_commits);
INIT_LIST_HEAD(&cur_trans->dirty_bgs);
INIT_LIST_HEAD(&cur_trans->io_bgs);
INIT_LIST_HEAD(&cur_trans->dropped_roots);
mutex_init(&cur_trans->cache_write_mutex);
cur_trans->num_dirty_bgs = 0;
spin_lock_init(&cur_trans->dirty_bgs_lock);
INIT_LIST_HEAD(&cur_trans->deleted_bgs);
spin_lock_init(&cur_trans->dropped_roots_lock);
list_add_tail(&cur_trans->list, &fs_info->trans_list);
extent_io_tree_init(&cur_trans->dirty_pages,
fs_info->btree_inode);
extent_io_tree_init(fs_info, &cur_trans->dirty_pages,
IO_TREE_TRANS_DIRTY_PAGES, fs_info->btree_inode);
fs_info->generation++;
cur_trans->transid = fs_info->generation;
fs_info->running_transaction = cur_trans;
@ -928,7 +891,7 @@ int btrfs_write_marked_extents(struct btrfs_fs_info *fs_info,
* superblock that points to btree nodes/leafs for which
* writeback hasn't finished yet (and without errors).
* We cleanup any entries left in the io tree when committing
* the transaction (through clear_btree_io_tree()).
* the transaction (through extent_io_tree_release()).
*/
if (err == -ENOMEM) {
err = 0;
@ -973,7 +936,7 @@ static int __btrfs_wait_marked_extents(struct btrfs_fs_info *fs_info,
* left in the io tree. For a log commit, we don't remove them
* after committing the log because the tree can be accessed
* concurrently - we do it only at transaction commit time when
* it's safe to do it (through clear_btree_io_tree()).
* it's safe to do it (through extent_io_tree_release()).
*/
err = clear_extent_bit(dirty_pages, start, end,
EXTENT_NEED_WAIT, 0, 0, &cached_state);
@ -1051,7 +1014,7 @@ static int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans)
blk_finish_plug(&plug);
ret2 = btrfs_wait_extents(fs_info, dirty_pages);
clear_btree_io_tree(&trans->transaction->dirty_pages);
extent_io_tree_release(&trans->transaction->dirty_pages);
if (ret)
return ret;
@ -1130,17 +1093,17 @@ static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans)
if (ret)
return ret;
ret = btrfs_run_dev_stats(trans, fs_info);
ret = btrfs_run_dev_stats(trans);
if (ret)
return ret;
ret = btrfs_run_dev_replace(trans, fs_info);
ret = btrfs_run_dev_replace(trans);
if (ret)
return ret;
ret = btrfs_run_qgroups(trans);
if (ret)
return ret;
ret = btrfs_setup_space_cache(trans, fs_info);
ret = btrfs_setup_space_cache(trans);
if (ret)
return ret;
@ -1168,7 +1131,7 @@ again:
}
while (!list_empty(dirty_bgs) || !list_empty(io_bgs)) {
ret = btrfs_write_dirty_block_groups(trans, fs_info);
ret = btrfs_write_dirty_block_groups(trans);
if (ret)
return ret;
ret = btrfs_run_delayed_refs(trans, (unsigned long)-1);
@ -2241,8 +2204,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans)
memcpy(fs_info->super_for_commit, fs_info->super_copy,
sizeof(*fs_info->super_copy));
btrfs_update_commit_device_size(fs_info);
btrfs_update_commit_device_bytes_used(cur_trans);
btrfs_commit_device_sizes(cur_trans);
clear_bit(BTRFS_FS_LOG1_ERR, &fs_info->flags);
clear_bit(BTRFS_FS_LOG2_ERR, &fs_info->flags);

4
fs/btrfs/transaction.h
View file

@ -51,7 +51,7 @@ struct btrfs_transaction {
wait_queue_head_t writer_wait;
wait_queue_head_t commit_wait;
struct list_head pending_snapshots;
struct list_head pending_chunks;
struct list_head dev_update_list;
struct list_head switch_commits;
struct list_head dirty_bgs;
@ -80,7 +80,6 @@ struct btrfs_transaction {
*/
struct mutex cache_write_mutex;
spinlock_t dirty_bgs_lock;
unsigned int num_dirty_bgs;
/* Protected by spin lock fs_info->unused_bgs_lock. */
struct list_head deleted_bgs;
spinlock_t dropped_roots_lock;
@ -120,7 +119,6 @@ struct btrfs_trans_handle {
bool allocating_chunk;
bool can_flush_pending_bgs;
bool reloc_reserved;
bool sync;
bool dirty;
struct btrfs_root *root;
struct btrfs_fs_info *fs_info;

519
fs/btrfs/tree-checker.c
View file

@ -15,6 +15,9 @@
* carefully reviewed otherwise so it does not prevent mount of valid images.
*/
#include <linux/types.h>
#include <linux/stddef.h>
#include <linux/error-injection.h>
#include "ctree.h"
#include "tree-checker.h"
#include "disk-io.h"
@ -41,12 +44,12 @@
* Append generic "corrupt leaf/node root=%llu block=%llu slot=%d: " to @fmt.
* Allows callers to customize the output.
*/
__printf(4, 5)
__printf(3, 4)
__cold
static void generic_err(const struct btrfs_fs_info *fs_info,
const struct extent_buffer *eb, int slot,
static void generic_err(const struct extent_buffer *eb, int slot,
const char *fmt, ...)
{
const struct btrfs_fs_info *fs_info = eb->fs_info;
struct va_format vaf;
va_list args;
@ -66,12 +69,12 @@ static void generic_err(const struct btrfs_fs_info *fs_info,
* Customized reporter for extent data item, since its key objectid and
* offset has its own meaning.
*/
__printf(4, 5)
__printf(3, 4)
__cold
static void file_extent_err(const struct btrfs_fs_info *fs_info,
const struct extent_buffer *eb, int slot,
static void file_extent_err(const struct extent_buffer *eb, int slot,
const char *fmt, ...)
{
const struct btrfs_fs_info *fs_info = eb->fs_info;
struct btrfs_key key;
struct va_format vaf;
va_list args;
@ -94,26 +97,26 @@ static void file_extent_err(const struct btrfs_fs_info *fs_info,
* Return 0 if the btrfs_file_extent_##name is aligned to @alignment
* Else return 1
*/
#define CHECK_FE_ALIGNED(fs_info, leaf, slot, fi, name, alignment) \
#define CHECK_FE_ALIGNED(leaf, slot, fi, name, alignment) \
({ \
if (!IS_ALIGNED(btrfs_file_extent_##name((leaf), (fi)), (alignment))) \
file_extent_err((fs_info), (leaf), (slot), \
file_extent_err((leaf), (slot), \
"invalid %s for file extent, have %llu, should be aligned to %u", \
(#name), btrfs_file_extent_##name((leaf), (fi)), \
(alignment)); \
(!IS_ALIGNED(btrfs_file_extent_##name((leaf), (fi)), (alignment))); \
})
static int check_extent_data_item(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf,
static int check_extent_data_item(struct extent_buffer *leaf,
struct btrfs_key *key, int slot)
{
struct btrfs_fs_info *fs_info = leaf->fs_info;
struct btrfs_file_extent_item *fi;
u32 sectorsize = fs_info->sectorsize;
u32 item_size = btrfs_item_size_nr(leaf, slot);
if (!IS_ALIGNED(key->offset, sectorsize)) {
file_extent_err(fs_info, leaf, slot,
file_extent_err(leaf, slot,
"unaligned file_offset for file extent, have %llu should be aligned to %u",
key->offset, sectorsize);
return -EUCLEAN;
@ -122,7 +125,7 @@ static int check_extent_data_item(struct btrfs_fs_info *fs_info,
fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
if (btrfs_file_extent_type(leaf, fi) > BTRFS_FILE_EXTENT_TYPES) {
file_extent_err(fs_info, leaf, slot,
file_extent_err(leaf, slot,
"invalid type for file extent, have %u expect range [0, %u]",
btrfs_file_extent_type(leaf, fi),
BTRFS_FILE_EXTENT_TYPES);
@ -134,14 +137,14 @@ static int check_extent_data_item(struct btrfs_fs_info *fs_info,
* and must be caught in open_ctree().
*/
if (btrfs_file_extent_compression(leaf, fi) > BTRFS_COMPRESS_TYPES) {
file_extent_err(fs_info, leaf, slot,
file_extent_err(leaf, slot,
"invalid compression for file extent, have %u expect range [0, %u]",
btrfs_file_extent_compression(leaf, fi),
BTRFS_COMPRESS_TYPES);
return -EUCLEAN;
}
if (btrfs_file_extent_encryption(leaf, fi)) {
file_extent_err(fs_info, leaf, slot,
file_extent_err(leaf, slot,
"invalid encryption for file extent, have %u expect 0",
btrfs_file_extent_encryption(leaf, fi));
return -EUCLEAN;
@ -149,7 +152,7 @@ static int check_extent_data_item(struct btrfs_fs_info *fs_info,
if (btrfs_file_extent_type(leaf, fi) == BTRFS_FILE_EXTENT_INLINE) {
/* Inline extent must have 0 as key offset */
if (key->offset) {
file_extent_err(fs_info, leaf, slot,
file_extent_err(leaf, slot,
"invalid file_offset for inline file extent, have %llu expect 0",
key->offset);
return -EUCLEAN;
@ -163,7 +166,7 @@ static int check_extent_data_item(struct btrfs_fs_info *fs_info,
/* Uncompressed inline extent size must match item size */
if (item_size != BTRFS_FILE_EXTENT_INLINE_DATA_START +
btrfs_file_extent_ram_bytes(leaf, fi)) {
file_extent_err(fs_info, leaf, slot,
file_extent_err(leaf, slot,
"invalid ram_bytes for uncompressed inline extent, have %u expect %llu",
item_size, BTRFS_FILE_EXTENT_INLINE_DATA_START +
btrfs_file_extent_ram_bytes(leaf, fi));
@ -174,41 +177,41 @@ static int check_extent_data_item(struct btrfs_fs_info *fs_info,
/* Regular or preallocated extent has fixed item size */
if (item_size != sizeof(*fi)) {
file_extent_err(fs_info, leaf, slot,
file_extent_err(leaf, slot,
"invalid item size for reg/prealloc file extent, have %u expect %zu",
item_size, sizeof(*fi));
return -EUCLEAN;
}
if (CHECK_FE_ALIGNED(fs_info, leaf, slot, fi, ram_bytes, sectorsize) ||
CHECK_FE_ALIGNED(fs_info, leaf, slot, fi, disk_bytenr, sectorsize) ||
CHECK_FE_ALIGNED(fs_info, leaf, slot, fi, disk_num_bytes, sectorsize) ||
CHECK_FE_ALIGNED(fs_info, leaf, slot, fi, offset, sectorsize) ||
CHECK_FE_ALIGNED(fs_info, leaf, slot, fi, num_bytes, sectorsize))
if (CHECK_FE_ALIGNED(leaf, slot, fi, ram_bytes, sectorsize) ||
CHECK_FE_ALIGNED(leaf, slot, fi, disk_bytenr, sectorsize) ||
CHECK_FE_ALIGNED(leaf, slot, fi, disk_num_bytes, sectorsize) ||
CHECK_FE_ALIGNED(leaf, slot, fi, offset, sectorsize) ||
CHECK_FE_ALIGNED(leaf, slot, fi, num_bytes, sectorsize))
return -EUCLEAN;
return 0;
}
static int check_csum_item(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf, struct btrfs_key *key,
static int check_csum_item(struct extent_buffer *leaf, struct btrfs_key *key,
int slot)
{
struct btrfs_fs_info *fs_info = leaf->fs_info;
u32 sectorsize = fs_info->sectorsize;
u32 csumsize = btrfs_super_csum_size(fs_info->super_copy);
if (key->objectid != BTRFS_EXTENT_CSUM_OBJECTID) {
generic_err(fs_info, leaf, slot,
generic_err(leaf, slot,
"invalid key objectid for csum item, have %llu expect %llu",
key->objectid, BTRFS_EXTENT_CSUM_OBJECTID);
return -EUCLEAN;
}
if (!IS_ALIGNED(key->offset, sectorsize)) {
generic_err(fs_info, leaf, slot,
generic_err(leaf, slot,
"unaligned key offset for csum item, have %llu should be aligned to %u",
key->offset, sectorsize);
return -EUCLEAN;
}
if (!IS_ALIGNED(btrfs_item_size_nr(leaf, slot), csumsize)) {
generic_err(fs_info, leaf, slot,
generic_err(leaf, slot,
"unaligned item size for csum item, have %u should be aligned to %u",
btrfs_item_size_nr(leaf, slot), csumsize);
return -EUCLEAN;
@ -220,12 +223,12 @@ static int check_csum_item(struct btrfs_fs_info *fs_info,
* Customized reported for dir_item, only important new info is key->objectid,
* which represents inode number
*/
__printf(4, 5)
__printf(3, 4)
__cold
static void dir_item_err(const struct btrfs_fs_info *fs_info,
const struct extent_buffer *eb, int slot,
static void dir_item_err(const struct extent_buffer *eb, int slot,
const char *fmt, ...)
{
const struct btrfs_fs_info *fs_info = eb->fs_info;
struct btrfs_key key;
struct va_format vaf;
va_list args;
@ -244,10 +247,10 @@ static void dir_item_err(const struct btrfs_fs_info *fs_info,
va_end(args);
}
static int check_dir_item(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf,
static int check_dir_item(struct extent_buffer *leaf,
struct btrfs_key *key, int slot)
{
struct btrfs_fs_info *fs_info = leaf->fs_info;
struct btrfs_dir_item *di;
u32 item_size = btrfs_item_size_nr(leaf, slot);
u32 cur = 0;
@ -263,7 +266,7 @@ static int check_dir_item(struct btrfs_fs_info *fs_info,
/* header itself should not cross item boundary */
if (cur + sizeof(*di) > item_size) {
dir_item_err(fs_info, leaf, slot,
dir_item_err(leaf, slot,
"dir item header crosses item boundary, have %zu boundary %u",
cur + sizeof(*di), item_size);
return -EUCLEAN;
@ -272,7 +275,7 @@ static int check_dir_item(struct btrfs_fs_info *fs_info,
/* dir type check */
dir_type = btrfs_dir_type(leaf, di);
if (dir_type >= BTRFS_FT_MAX) {
dir_item_err(fs_info, leaf, slot,
dir_item_err(leaf, slot,
"invalid dir item type, have %u expect [0, %u)",
dir_type, BTRFS_FT_MAX);
return -EUCLEAN;
@ -280,14 +283,14 @@ static int check_dir_item(struct btrfs_fs_info *fs_info,
if (key->type == BTRFS_XATTR_ITEM_KEY &&
dir_type != BTRFS_FT_XATTR) {
dir_item_err(fs_info, leaf, slot,
dir_item_err(leaf, slot,
"invalid dir item type for XATTR key, have %u expect %u",
dir_type, BTRFS_FT_XATTR);
return -EUCLEAN;
}
if (dir_type == BTRFS_FT_XATTR &&
key->type != BTRFS_XATTR_ITEM_KEY) {
dir_item_err(fs_info, leaf, slot,
dir_item_err(leaf, slot,
"xattr dir type found for non-XATTR key");
return -EUCLEAN;
}
@ -300,13 +303,13 @@ static int check_dir_item(struct btrfs_fs_info *fs_info,
name_len = btrfs_dir_name_len(leaf, di);
data_len = btrfs_dir_data_len(leaf, di);
if (name_len > max_name_len) {
dir_item_err(fs_info, leaf, slot,
dir_item_err(leaf, slot,
"dir item name len too long, have %u max %u",
name_len, max_name_len);
return -EUCLEAN;
}
if (name_len + data_len > BTRFS_MAX_XATTR_SIZE(fs_info)) {
dir_item_err(fs_info, leaf, slot,
dir_item_err(leaf, slot,
"dir item name and data len too long, have %u max %u",
name_len + data_len,
BTRFS_MAX_XATTR_SIZE(fs_info));
@ -314,7 +317,7 @@ static int check_dir_item(struct btrfs_fs_info *fs_info,
}
if (data_len && dir_type != BTRFS_FT_XATTR) {
dir_item_err(fs_info, leaf, slot,
dir_item_err(leaf, slot,
"dir item with invalid data len, have %u expect 0",
data_len);
return -EUCLEAN;
@ -324,7 +327,7 @@ static int check_dir_item(struct btrfs_fs_info *fs_info,
/* header and name/data should not cross item boundary */
if (cur + total_size > item_size) {
dir_item_err(fs_info, leaf, slot,
dir_item_err(leaf, slot,
"dir item data crosses item boundary, have %u boundary %u",
cur + total_size, item_size);
return -EUCLEAN;
@ -342,7 +345,7 @@ static int check_dir_item(struct btrfs_fs_info *fs_info,
(unsigned long)(di + 1), name_len);
name_hash = btrfs_name_hash(namebuf, name_len);
if (key->offset != name_hash) {
dir_item_err(fs_info, leaf, slot,
dir_item_err(leaf, slot,
"name hash mismatch with key, have 0x%016x expect 0x%016llx",
name_hash, key->offset);
return -EUCLEAN;
@ -354,12 +357,12 @@ static int check_dir_item(struct btrfs_fs_info *fs_info,
return 0;
}
__printf(4, 5)
__printf(3, 4)
__cold
static void block_group_err(const struct btrfs_fs_info *fs_info,
const struct extent_buffer *eb, int slot,
static void block_group_err(const struct extent_buffer *eb, int slot,
const char *fmt, ...)
{
const struct btrfs_fs_info *fs_info = eb->fs_info;
struct btrfs_key key;
struct va_format vaf;
va_list args;
@ -378,8 +381,7 @@ static void block_group_err(const struct btrfs_fs_info *fs_info,
va_end(args);
}
static int check_block_group_item(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf,
static int check_block_group_item(struct extent_buffer *leaf,
struct btrfs_key *key, int slot)
{
struct btrfs_block_group_item bgi;
@ -392,13 +394,13 @@ static int check_block_group_item(struct btrfs_fs_info *fs_info,
* handle it. We care more about the size.
*/
if (key->offset == 0) {
block_group_err(fs_info, leaf, slot,
block_group_err(leaf, slot,
"invalid block group size 0");
return -EUCLEAN;
}
if (item_size != sizeof(bgi)) {
block_group_err(fs_info, leaf, slot,
block_group_err(leaf, slot,
"invalid item size, have %u expect %zu",
item_size, sizeof(bgi));
return -EUCLEAN;
@ -408,7 +410,7 @@ static int check_block_group_item(struct btrfs_fs_info *fs_info,
sizeof(bgi));
if (btrfs_block_group_chunk_objectid(&bgi) !=
BTRFS_FIRST_CHUNK_TREE_OBJECTID) {
block_group_err(fs_info, leaf, slot,
block_group_err(leaf, slot,
"invalid block group chunk objectid, have %llu expect %llu",
btrfs_block_group_chunk_objectid(&bgi),
BTRFS_FIRST_CHUNK_TREE_OBJECTID);
@ -416,7 +418,7 @@ static int check_block_group_item(struct btrfs_fs_info *fs_info,
}
if (btrfs_block_group_used(&bgi) > key->offset) {
block_group_err(fs_info, leaf, slot,
block_group_err(leaf, slot,
"invalid block group used, have %llu expect [0, %llu)",
btrfs_block_group_used(&bgi), key->offset);
return -EUCLEAN;
@ -424,7 +426,7 @@ static int check_block_group_item(struct btrfs_fs_info *fs_info,
flags = btrfs_block_group_flags(&bgi);
if (hweight64(flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) > 1) {
block_group_err(fs_info, leaf, slot,
block_group_err(leaf, slot,
"invalid profile flags, have 0x%llx (%lu bits set) expect no more than 1 bit set",
flags & BTRFS_BLOCK_GROUP_PROFILE_MASK,
hweight64(flags & BTRFS_BLOCK_GROUP_PROFILE_MASK));
@ -437,7 +439,7 @@ static int check_block_group_item(struct btrfs_fs_info *fs_info,
type != BTRFS_BLOCK_GROUP_SYSTEM &&
type != (BTRFS_BLOCK_GROUP_METADATA |
BTRFS_BLOCK_GROUP_DATA)) {
block_group_err(fs_info, leaf, slot,
block_group_err(leaf, slot,
"invalid type, have 0x%llx (%lu bits set) expect either 0x%llx, 0x%llx, 0x%llx or 0x%llx",
type, hweight64(type),
BTRFS_BLOCK_GROUP_DATA, BTRFS_BLOCK_GROUP_METADATA,
@ -448,37 +450,367 @@ static int check_block_group_item(struct btrfs_fs_info *fs_info,
return 0;
}
__printf(4, 5)
__cold
static void chunk_err(const struct extent_buffer *leaf,
const struct btrfs_chunk *chunk, u64 logical,
const char *fmt, ...)
{
const struct btrfs_fs_info *fs_info = leaf->fs_info;
bool is_sb;
struct va_format vaf;
va_list args;
int i;
int slot = -1;
/* Only superblock eb is able to have such small offset */
is_sb = (leaf->start == BTRFS_SUPER_INFO_OFFSET);
if (!is_sb) {
/*
* Get the slot number by iterating through all slots, this
* would provide better readability.
*/
for (i = 0; i < btrfs_header_nritems(leaf); i++) {
if (btrfs_item_ptr_offset(leaf, i) ==
(unsigned long)chunk) {
slot = i;
break;
}
}
}
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
if (is_sb)
btrfs_crit(fs_info,
"corrupt superblock syschunk array: chunk_start=%llu, %pV",
logical, &vaf);
else
btrfs_crit(fs_info,
"corrupt leaf: root=%llu block=%llu slot=%d chunk_start=%llu, %pV",
BTRFS_CHUNK_TREE_OBJECTID, leaf->start, slot,
logical, &vaf);
va_end(args);
}
/*
* The common chunk check which could also work on super block sys chunk array.
*
* Return -EUCLEAN if anything is corrupted.
* Return 0 if everything is OK.
*/
int btrfs_check_chunk_valid(struct extent_buffer *leaf,
struct btrfs_chunk *chunk, u64 logical)
{
struct btrfs_fs_info *fs_info = leaf->fs_info;
u64 length;
u64 stripe_len;
u16 num_stripes;
u16 sub_stripes;
u64 type;
u64 features;
bool mixed = false;
length = btrfs_chunk_length(leaf, chunk);
stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
sub_stripes = btrfs_chunk_sub_stripes(leaf, chunk);
type = btrfs_chunk_type(leaf, chunk);
if (!num_stripes) {
chunk_err(leaf, chunk, logical,
"invalid chunk num_stripes, have %u", num_stripes);
return -EUCLEAN;
}
if (!IS_ALIGNED(logical, fs_info->sectorsize)) {
chunk_err(leaf, chunk, logical,
"invalid chunk logical, have %llu should aligned to %u",
logical, fs_info->sectorsize);
return -EUCLEAN;
}
if (btrfs_chunk_sector_size(leaf, chunk) != fs_info->sectorsize) {
chunk_err(leaf, chunk, logical,
"invalid chunk sectorsize, have %u expect %u",
btrfs_chunk_sector_size(leaf, chunk),
fs_info->sectorsize);
return -EUCLEAN;
}
if (!length || !IS_ALIGNED(length, fs_info->sectorsize)) {
chunk_err(leaf, chunk, logical,
"invalid chunk length, have %llu", length);
return -EUCLEAN;
}
if (!is_power_of_2(stripe_len) || stripe_len != BTRFS_STRIPE_LEN) {
chunk_err(leaf, chunk, logical,
"invalid chunk stripe length: %llu",
stripe_len);
return -EUCLEAN;
}
if (~(BTRFS_BLOCK_GROUP_TYPE_MASK | BTRFS_BLOCK_GROUP_PROFILE_MASK) &
type) {
chunk_err(leaf, chunk, logical,
"unrecognized chunk type: 0x%llx",
~(BTRFS_BLOCK_GROUP_TYPE_MASK |
BTRFS_BLOCK_GROUP_PROFILE_MASK) &
btrfs_chunk_type(leaf, chunk));
return -EUCLEAN;
}
if (!is_power_of_2(type & BTRFS_BLOCK_GROUP_PROFILE_MASK) &&
(type & BTRFS_BLOCK_GROUP_PROFILE_MASK) != 0) {
chunk_err(leaf, chunk, logical,
"invalid chunk profile flag: 0x%llx, expect 0 or 1 bit set",
type & BTRFS_BLOCK_GROUP_PROFILE_MASK);
return -EUCLEAN;
}
if ((type & BTRFS_BLOCK_GROUP_TYPE_MASK) == 0) {
chunk_err(leaf, chunk, logical,
"missing chunk type flag, have 0x%llx one bit must be set in 0x%llx",
type, BTRFS_BLOCK_GROUP_TYPE_MASK);
return -EUCLEAN;
}
if ((type & BTRFS_BLOCK_GROUP_SYSTEM) &&
(type & (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA))) {
chunk_err(leaf, chunk, logical,
"system chunk with data or metadata type: 0x%llx",
type);
return -EUCLEAN;
}
features = btrfs_super_incompat_flags(fs_info->super_copy);
if (features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
mixed = true;
if (!mixed) {
if ((type & BTRFS_BLOCK_GROUP_METADATA) &&
(type & BTRFS_BLOCK_GROUP_DATA)) {
chunk_err(leaf, chunk, logical,
"mixed chunk type in non-mixed mode: 0x%llx", type);
return -EUCLEAN;
}
}
if ((type & BTRFS_BLOCK_GROUP_RAID10 && sub_stripes != 2) ||
(type & BTRFS_BLOCK_GROUP_RAID1 && num_stripes != 2) ||
(type & BTRFS_BLOCK_GROUP_RAID5 && num_stripes < 2) ||
(type & BTRFS_BLOCK_GROUP_RAID6 && num_stripes < 3) ||
(type & BTRFS_BLOCK_GROUP_DUP && num_stripes != 2) ||
((type & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 && num_stripes != 1)) {
chunk_err(leaf, chunk, logical,
"invalid num_stripes:sub_stripes %u:%u for profile %llu",
num_stripes, sub_stripes,
type & BTRFS_BLOCK_GROUP_PROFILE_MASK);
return -EUCLEAN;
}
return 0;
}
__printf(3, 4)
__cold
static void dev_item_err(const struct extent_buffer *eb, int slot,
const char *fmt, ...)
{
struct btrfs_key key;
struct va_format vaf;
va_list args;
btrfs_item_key_to_cpu(eb, &key, slot);
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
btrfs_crit(eb->fs_info,
"corrupt %s: root=%llu block=%llu slot=%d devid=%llu %pV",
btrfs_header_level(eb) == 0 ? "leaf" : "node",
btrfs_header_owner(eb), btrfs_header_bytenr(eb), slot,
key.objectid, &vaf);
va_end(args);
}
static int check_dev_item(struct extent_buffer *leaf,
struct btrfs_key *key, int slot)
{
struct btrfs_fs_info *fs_info = leaf->fs_info;
struct btrfs_dev_item *ditem;
u64 max_devid = max(BTRFS_MAX_DEVS(fs_info), BTRFS_MAX_DEVS_SYS_CHUNK);
if (key->objectid != BTRFS_DEV_ITEMS_OBJECTID) {
dev_item_err(leaf, slot,
"invalid objectid: has=%llu expect=%llu",
key->objectid, BTRFS_DEV_ITEMS_OBJECTID);
return -EUCLEAN;
}
if (key->offset > max_devid) {
dev_item_err(leaf, slot,
"invalid devid: has=%llu expect=[0, %llu]",
key->offset, max_devid);
return -EUCLEAN;
}
ditem = btrfs_item_ptr(leaf, slot, struct btrfs_dev_item);
if (btrfs_device_id(leaf, ditem) != key->offset) {
dev_item_err(leaf, slot,
"devid mismatch: key has=%llu item has=%llu",
key->offset, btrfs_device_id(leaf, ditem));
return -EUCLEAN;
}
/*
* For device total_bytes, we don't have reliable way to check it, as
* it can be 0 for device removal. Device size check can only be done
* by dev extents check.
*/
if (btrfs_device_bytes_used(leaf, ditem) >
btrfs_device_total_bytes(leaf, ditem)) {
dev_item_err(leaf, slot,
"invalid bytes used: have %llu expect [0, %llu]",
btrfs_device_bytes_used(leaf, ditem),
btrfs_device_total_bytes(leaf, ditem));
return -EUCLEAN;
}
/*
* Remaining members like io_align/type/gen/dev_group aren't really
* utilized. Skip them to make later usage of them easier.
*/
return 0;
}
/* Inode item error output has the same format as dir_item_err() */
#define inode_item_err(fs_info, eb, slot, fmt, ...) \
dir_item_err(eb, slot, fmt, __VA_ARGS__)
static int check_inode_item(struct extent_buffer *leaf,
struct btrfs_key *key, int slot)
{
struct btrfs_fs_info *fs_info = leaf->fs_info;
struct btrfs_inode_item *iitem;
u64 super_gen = btrfs_super_generation(fs_info->super_copy);
u32 valid_mask = (S_IFMT | S_ISUID | S_ISGID | S_ISVTX | 0777);
u32 mode;
if ((key->objectid < BTRFS_FIRST_FREE_OBJECTID ||
key->objectid > BTRFS_LAST_FREE_OBJECTID) &&
key->objectid != BTRFS_ROOT_TREE_DIR_OBJECTID &&
key->objectid != BTRFS_FREE_INO_OBJECTID) {
generic_err(leaf, slot,
"invalid key objectid: has %llu expect %llu or [%llu, %llu] or %llu",
key->objectid, BTRFS_ROOT_TREE_DIR_OBJECTID,
BTRFS_FIRST_FREE_OBJECTID,
BTRFS_LAST_FREE_OBJECTID,
BTRFS_FREE_INO_OBJECTID);
return -EUCLEAN;
}
if (key->offset != 0) {
inode_item_err(fs_info, leaf, slot,
"invalid key offset: has %llu expect 0",
key->offset);
return -EUCLEAN;
}
iitem = btrfs_item_ptr(leaf, slot, struct btrfs_inode_item);
/* Here we use super block generation + 1 to handle log tree */
if (btrfs_inode_generation(leaf, iitem) > super_gen + 1) {
inode_item_err(fs_info, leaf, slot,
"invalid inode generation: has %llu expect (0, %llu]",
btrfs_inode_generation(leaf, iitem),
super_gen + 1);
return -EUCLEAN;
}
/* Note for ROOT_TREE_DIR_ITEM, mkfs could set its transid 0 */
if (btrfs_inode_transid(leaf, iitem) > super_gen + 1) {
inode_item_err(fs_info, leaf, slot,
"invalid inode generation: has %llu expect [0, %llu]",
btrfs_inode_transid(leaf, iitem), super_gen + 1);
return -EUCLEAN;
}
/*
* For size and nbytes it's better not to be too strict, as for dir
* item its size/nbytes can easily get wrong, but doesn't affect
* anything in the fs. So here we skip the check.
*/
mode = btrfs_inode_mode(leaf, iitem);
if (mode & ~valid_mask) {
inode_item_err(fs_info, leaf, slot,
"unknown mode bit detected: 0x%x",
mode & ~valid_mask);
return -EUCLEAN;
}
/*
* S_IFMT is not bit mapped so we can't completely rely on is_power_of_2,
* but is_power_of_2() can save us from checking FIFO/CHR/DIR/REG.
* Only needs to check BLK, LNK and SOCKS
*/
if (!is_power_of_2(mode & S_IFMT)) {
if (!S_ISLNK(mode) && !S_ISBLK(mode) && !S_ISSOCK(mode)) {
inode_item_err(fs_info, leaf, slot,
"invalid mode: has 0%o expect valid S_IF* bit(s)",
mode & S_IFMT);
return -EUCLEAN;
}
}
if (S_ISDIR(mode) && btrfs_inode_nlink(leaf, iitem) > 1) {
inode_item_err(fs_info, leaf, slot,
"invalid nlink: has %u expect no more than 1 for dir",
btrfs_inode_nlink(leaf, iitem));
return -EUCLEAN;
}
if (btrfs_inode_flags(leaf, iitem) & ~BTRFS_INODE_FLAG_MASK) {
inode_item_err(fs_info, leaf, slot,
"unknown flags detected: 0x%llx",
btrfs_inode_flags(leaf, iitem) &
~BTRFS_INODE_FLAG_MASK);
return -EUCLEAN;
}
return 0;
}
/*
* Common point to switch the item-specific validation.
*/
static int check_leaf_item(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf,
static int check_leaf_item(struct extent_buffer *leaf,
struct btrfs_key *key, int slot)
{
int ret = 0;
struct btrfs_chunk *chunk;
switch (key->type) {
case BTRFS_EXTENT_DATA_KEY:
ret = check_extent_data_item(fs_info, leaf, key, slot);
ret = check_extent_data_item(leaf, key, slot);
break;
case BTRFS_EXTENT_CSUM_KEY:
ret = check_csum_item(fs_info, leaf, key, slot);
ret = check_csum_item(leaf, key, slot);
break;
case BTRFS_DIR_ITEM_KEY:
case BTRFS_DIR_INDEX_KEY:
case BTRFS_XATTR_ITEM_KEY:
ret = check_dir_item(fs_info, leaf, key, slot);
ret = check_dir_item(leaf, key, slot);
break;
case BTRFS_BLOCK_GROUP_ITEM_KEY:
ret = check_block_group_item(fs_info, leaf, key, slot);
ret = check_block_group_item(leaf, key, slot);
break;
case BTRFS_CHUNK_ITEM_KEY:
chunk = btrfs_item_ptr(leaf, slot, struct btrfs_chunk);
ret = btrfs_check_chunk_valid(leaf, chunk, key->offset);
break;
case BTRFS_DEV_ITEM_KEY:
ret = check_dev_item(leaf, key, slot);
break;
case BTRFS_INODE_ITEM_KEY:
ret = check_inode_item(leaf, key, slot);
break;
}
return ret;
}
static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
bool check_item_data)
static int check_leaf(struct extent_buffer *leaf, bool check_item_data)
{
struct btrfs_fs_info *fs_info = leaf->fs_info;
/* No valid key type is 0, so all key should be larger than this key */
struct btrfs_key prev_key = {0, 0, 0};
struct btrfs_key key;
@ -486,7 +818,7 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
int slot;
if (btrfs_header_level(leaf) != 0) {
generic_err(fs_info, leaf, 0,
generic_err(leaf, 0,
"invalid level for leaf, have %d expect 0",
btrfs_header_level(leaf));
return -EUCLEAN;
@ -502,7 +834,6 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
*/
if (nritems == 0 && !btrfs_header_flag(leaf, BTRFS_HEADER_FLAG_RELOC)) {
u64 owner = btrfs_header_owner(leaf);
struct btrfs_root *check_root;
/* These trees must never be empty */
if (owner == BTRFS_ROOT_TREE_OBJECTID ||
@ -511,34 +842,11 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
owner == BTRFS_DEV_TREE_OBJECTID ||
owner == BTRFS_FS_TREE_OBJECTID ||
owner == BTRFS_DATA_RELOC_TREE_OBJECTID) {
generic_err(fs_info, leaf, 0,
generic_err(leaf, 0,
"invalid root, root %llu must never be empty",
owner);
return -EUCLEAN;
}
key.objectid = owner;
key.type = BTRFS_ROOT_ITEM_KEY;
key.offset = (u64)-1;
check_root = btrfs_get_fs_root(fs_info, &key, false);
/*
* The only reason we also check NULL here is that during
* open_ctree() some roots has not yet been set up.
*/
if (!IS_ERR_OR_NULL(check_root)) {
struct extent_buffer *eb;
eb = btrfs_root_node(check_root);
/* if leaf is the root, then it's fine */
if (leaf != eb) {
generic_err(fs_info, leaf, 0,
"invalid nritems, have %u should not be 0 for non-root leaf",
nritems);
free_extent_buffer(eb);
return -EUCLEAN;
}
free_extent_buffer(eb);
}
return 0;
}
@ -564,7 +872,7 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
/* Make sure the keys are in the right order */
if (btrfs_comp_cpu_keys(&prev_key, &key) >= 0) {
generic_err(fs_info, leaf, slot,
generic_err(leaf, slot,
"bad key order, prev (%llu %u %llu) current (%llu %u %llu)",
prev_key.objectid, prev_key.type,
prev_key.offset, key.objectid, key.type,
@ -583,7 +891,7 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
item_end_expected = btrfs_item_offset_nr(leaf,
slot - 1);
if (btrfs_item_end_nr(leaf, slot) != item_end_expected) {
generic_err(fs_info, leaf, slot,
generic_err(leaf, slot,
"unexpected item end, have %u expect %u",
btrfs_item_end_nr(leaf, slot),
item_end_expected);
@ -597,7 +905,7 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
*/
if (btrfs_item_end_nr(leaf, slot) >
BTRFS_LEAF_DATA_SIZE(fs_info)) {
generic_err(fs_info, leaf, slot,
generic_err(leaf, slot,
"slot end outside of leaf, have %u expect range [0, %u]",
btrfs_item_end_nr(leaf, slot),
BTRFS_LEAF_DATA_SIZE(fs_info));
@ -607,7 +915,7 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
/* Also check if the item pointer overlaps with btrfs item. */
if (btrfs_item_nr_offset(slot) + sizeof(struct btrfs_item) >
btrfs_item_ptr_offset(leaf, slot)) {
generic_err(fs_info, leaf, slot,
generic_err(leaf, slot,
"slot overlaps with its data, item end %lu data start %lu",
btrfs_item_nr_offset(slot) +
sizeof(struct btrfs_item),
@ -620,7 +928,7 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
* Check if the item size and content meet other
* criteria
*/
ret = check_leaf_item(fs_info, leaf, &key, slot);
ret = check_leaf_item(leaf, &key, slot);
if (ret < 0)
return ret;
}
@ -633,20 +941,20 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
return 0;
}
int btrfs_check_leaf_full(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf)
int btrfs_check_leaf_full(struct extent_buffer *leaf)
{
return check_leaf(fs_info, leaf, true);
return check_leaf(leaf, true);
}
ALLOW_ERROR_INJECTION(btrfs_check_leaf_full, ERRNO);
int btrfs_check_leaf_relaxed(struct extent_buffer *leaf)
{
return check_leaf(leaf, false);
}
int btrfs_check_leaf_relaxed(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf)
{
return check_leaf(fs_info, leaf, false);
}
int btrfs_check_node(struct btrfs_fs_info *fs_info, struct extent_buffer *node)
int btrfs_check_node(struct extent_buffer *node)
{
struct btrfs_fs_info *fs_info = node->fs_info;
unsigned long nr = btrfs_header_nritems(node);
struct btrfs_key key, next_key;
int slot;
@ -655,7 +963,7 @@ int btrfs_check_node(struct btrfs_fs_info *fs_info, struct extent_buffer *node)
int ret = 0;
if (level <= 0 || level >= BTRFS_MAX_LEVEL) {
generic_err(fs_info, node, 0,
generic_err(node, 0,
"invalid level for node, have %d expect [1, %d]",
level, BTRFS_MAX_LEVEL - 1);
return -EUCLEAN;
@ -675,13 +983,13 @@ int btrfs_check_node(struct btrfs_fs_info *fs_info, struct extent_buffer *node)
btrfs_node_key_to_cpu(node, &next_key, slot + 1);
if (!bytenr) {
generic_err(fs_info, node, slot,
generic_err(node, slot,
"invalid NULL node pointer");
ret = -EUCLEAN;
goto out;
}
if (!IS_ALIGNED(bytenr, fs_info->sectorsize)) {
generic_err(fs_info, node, slot,
generic_err(node, slot,
"unaligned pointer, have %llu should be aligned to %u",
bytenr, fs_info->sectorsize);
ret = -EUCLEAN;
@ -689,7 +997,7 @@ int btrfs_check_node(struct btrfs_fs_info *fs_info, struct extent_buffer *node)
}
if (btrfs_comp_cpu_keys(&key, &next_key) >= 0) {
generic_err(fs_info, node, slot,
generic_err(node, slot,
"bad key order, current (%llu %u %llu) next (%llu %u %llu)",
key.objectid, key.type, key.offset,
next_key.objectid, next_key.type,
@ -701,3 +1009,4 @@ int btrfs_check_node(struct btrfs_fs_info *fs_info, struct extent_buffer *node)
out:
return ret;
}
ALLOW_ERROR_INJECTION(btrfs_check_node, ERRNO);

11
fs/btrfs/tree-checker.h
View file

@ -14,15 +14,16 @@
* Will check not only the item pointers, but also every possible member
* in item data.
*/
int btrfs_check_leaf_full(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf);
int btrfs_check_leaf_full(struct extent_buffer *leaf);
/*
* Less strict leaf checker.
* Will only check item pointers, not reading item data.
*/
int btrfs_check_leaf_relaxed(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf);
int btrfs_check_node(struct btrfs_fs_info *fs_info, struct extent_buffer *node);
int btrfs_check_leaf_relaxed(struct extent_buffer *leaf);
int btrfs_check_node(struct extent_buffer *node);
int btrfs_check_chunk_valid(struct extent_buffer *leaf,
struct btrfs_chunk *chunk, u64 logical);
#endif

289
fs/btrfs/tree-log.c
View file

@ -139,7 +139,7 @@ static int start_log_trans(struct btrfs_trans_handle *trans,
mutex_lock(&root->log_mutex);
if (root->log_root) {
if (btrfs_need_log_full_commit(fs_info, trans)) {
if (btrfs_need_log_full_commit(trans)) {
ret = -EAGAIN;
goto out;
}
@ -225,6 +225,17 @@ void btrfs_end_log_trans(struct btrfs_root *root)
}
}
static int btrfs_write_tree_block(struct extent_buffer *buf)
{
return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start,
buf->start + buf->len - 1);
}
static void btrfs_wait_tree_block_writeback(struct extent_buffer *buf)
{
filemap_fdatawait_range(buf->pages[0]->mapping,
buf->start, buf->start + buf->len - 1);
}
/*
* the walk control struct is used to pass state down the chain when
@ -304,7 +315,7 @@ static int process_one_buffer(struct btrfs_root *log,
if (!ret && btrfs_buffer_uptodate(eb, gen, 0)) {
if (wc->pin && btrfs_header_level(eb) == 0)
ret = btrfs_exclude_logged_extents(fs_info, eb);
ret = btrfs_exclude_logged_extents(eb);
if (wc->write)
btrfs_write_tree_block(eb);
if (wc->wait)
@ -333,7 +344,6 @@ static noinline int overwrite_item(struct btrfs_trans_handle *trans,
struct extent_buffer *eb, int slot,
struct btrfs_key *key)
{
struct btrfs_fs_info *fs_info = root->fs_info;
int ret;
u32 item_size;
u64 saved_i_size = 0;
@ -454,10 +464,9 @@ insert:
found_size = btrfs_item_size_nr(path->nodes[0],
path->slots[0]);
if (found_size > item_size)
btrfs_truncate_item(fs_info, path, item_size, 1);
btrfs_truncate_item(path, item_size, 1);
else if (found_size < item_size)
btrfs_extend_item(fs_info, path,
item_size - found_size);
btrfs_extend_item(path, item_size - found_size);
} else if (ret) {
return ret;
}
@ -694,9 +703,11 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
goto out;
if (ins.objectid > 0) {
struct btrfs_ref ref = { 0 };
u64 csum_start;
u64 csum_end;
LIST_HEAD(ordered_sums);
/*
* is this extent already allocated in the extent
* allocation tree? If so, just add a reference
@ -704,10 +715,13 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
ret = btrfs_lookup_data_extent(fs_info, ins.objectid,
ins.offset);
if (ret == 0) {
ret = btrfs_inc_extent_ref(trans, root,
ins.objectid, ins.offset,
0, root->root_key.objectid,
btrfs_init_generic_ref(&ref,
BTRFS_ADD_DELAYED_REF,
ins.objectid, ins.offset, 0);
btrfs_init_data_ref(&ref,
root->root_key.objectid,
key->objectid, offset);
ret = btrfs_inc_extent_ref(trans, &ref);
if (ret)
goto out;
} else {
@ -2725,7 +2739,7 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans,
if (trans) {
btrfs_tree_lock(next);
btrfs_set_lock_blocking_write(next);
clean_tree_block(fs_info, next);
btrfs_clean_tree_block(next);
btrfs_wait_tree_block_writeback(next);
btrfs_tree_unlock(next);
} else {
@ -2809,7 +2823,7 @@ static noinline int walk_up_log_tree(struct btrfs_trans_handle *trans,
if (trans) {
btrfs_tree_lock(next);
btrfs_set_lock_blocking_write(next);
clean_tree_block(fs_info, next);
btrfs_clean_tree_block(next);
btrfs_wait_tree_block_writeback(next);
btrfs_tree_unlock(next);
} else {
@ -2891,7 +2905,7 @@ static int walk_log_tree(struct btrfs_trans_handle *trans,
if (trans) {
btrfs_tree_lock(next);
btrfs_set_lock_blocking_write(next);
clean_tree_block(fs_info, next);
btrfs_clean_tree_block(next);
btrfs_wait_tree_block_writeback(next);
btrfs_tree_unlock(next);
} else {
@ -3066,7 +3080,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
}
/* bail out if we need to do a full commit */
if (btrfs_need_log_full_commit(fs_info, trans)) {
if (btrfs_need_log_full_commit(trans)) {
ret = -EAGAIN;
mutex_unlock(&root->log_mutex);
goto out;
@ -3085,7 +3099,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
if (ret) {
blk_finish_plug(&plug);
btrfs_abort_transaction(trans, ret);
btrfs_set_log_full_commit(fs_info, trans);
btrfs_set_log_full_commit(trans);
mutex_unlock(&root->log_mutex);
goto out;
}
@ -3127,7 +3141,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
list_del_init(&root_log_ctx.list);
blk_finish_plug(&plug);
btrfs_set_log_full_commit(fs_info, trans);
btrfs_set_log_full_commit(trans);
if (ret != -ENOSPC) {
btrfs_abort_transaction(trans, ret);
@ -3173,7 +3187,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
* now that we've moved on to the tree of log tree roots,
* check the full commit flag again
*/
if (btrfs_need_log_full_commit(fs_info, trans)) {
if (btrfs_need_log_full_commit(trans)) {
blk_finish_plug(&plug);
btrfs_wait_tree_log_extents(log, mark);
mutex_unlock(&log_root_tree->log_mutex);
@ -3186,7 +3200,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
EXTENT_DIRTY | EXTENT_NEW);
blk_finish_plug(&plug);
if (ret) {
btrfs_set_log_full_commit(fs_info, trans);
btrfs_set_log_full_commit(trans);
btrfs_abort_transaction(trans, ret);
mutex_unlock(&log_root_tree->log_mutex);
goto out_wake_log_root;
@ -3196,7 +3210,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
ret = btrfs_wait_tree_log_extents(log_root_tree,
EXTENT_NEW | EXTENT_DIRTY);
if (ret) {
btrfs_set_log_full_commit(fs_info, trans);
btrfs_set_log_full_commit(trans);
mutex_unlock(&log_root_tree->log_mutex);
goto out_wake_log_root;
}
@ -3218,7 +3232,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
*/
ret = write_all_supers(fs_info, 1);
if (ret) {
btrfs_set_log_full_commit(fs_info, trans);
btrfs_set_log_full_commit(trans);
btrfs_abort_transaction(trans, ret);
goto out_wake_log_root;
}
@ -3422,7 +3436,7 @@ fail:
out_unlock:
mutex_unlock(&dir->log_mutex);
if (ret == -ENOSPC) {
btrfs_set_log_full_commit(root->fs_info, trans);
btrfs_set_log_full_commit(trans);
ret = 0;
} else if (ret < 0)
btrfs_abort_transaction(trans, ret);
@ -3438,7 +3452,6 @@ int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
const char *name, int name_len,
struct btrfs_inode *inode, u64 dirid)
{
struct btrfs_fs_info *fs_info = root->fs_info;
struct btrfs_root *log;
u64 index;
int ret;
@ -3456,7 +3469,7 @@ int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
dirid, &index);
mutex_unlock(&inode->log_mutex);
if (ret == -ENOSPC) {
btrfs_set_log_full_commit(fs_info, trans);
btrfs_set_log_full_commit(trans);
ret = 0;
} else if (ret < 0 && ret != -ENOENT)
btrfs_abort_transaction(trans, ret);
@ -5442,7 +5455,7 @@ static bool btrfs_must_commit_transaction(struct btrfs_trans_handle *trans,
* Make sure any commits to the log are forced to be full
* commits.
*/
btrfs_set_log_full_commit(fs_info, trans);
btrfs_set_log_full_commit(trans);
ret = true;
}
mutex_unlock(&inode->log_mutex);
@ -5819,6 +5832,190 @@ out:
return ret;
}
static int log_new_ancestors(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_path *path,
struct btrfs_log_ctx *ctx)
{
struct btrfs_key found_key;
btrfs_item_key_to_cpu(path->nodes[0], &found_key, path->slots[0]);
while (true) {
struct btrfs_fs_info *fs_info = root->fs_info;
const u64 last_committed = fs_info->last_trans_committed;
struct extent_buffer *leaf = path->nodes[0];
int slot = path->slots[0];
struct btrfs_key search_key;
struct inode *inode;
int ret = 0;
btrfs_release_path(path);
search_key.objectid = found_key.offset;
search_key.type = BTRFS_INODE_ITEM_KEY;
search_key.offset = 0;
inode = btrfs_iget(fs_info->sb, &search_key, root, NULL);
if (IS_ERR(inode))
return PTR_ERR(inode);
if (BTRFS_I(inode)->generation > last_committed)
ret = btrfs_log_inode(trans, root, BTRFS_I(inode),
LOG_INODE_EXISTS,
0, LLONG_MAX, ctx);
iput(inode);
if (ret)
return ret;
if (search_key.objectid == BTRFS_FIRST_FREE_OBJECTID)
break;
search_key.type = BTRFS_INODE_REF_KEY;
ret = btrfs_search_slot(NULL, root, &search_key, path, 0, 0);
if (ret < 0)
return ret;
leaf = path->nodes[0];
slot = path->slots[0];
if (slot >= btrfs_header_nritems(leaf)) {
ret = btrfs_next_leaf(root, path);
if (ret < 0)
return ret;
else if (ret > 0)
return -ENOENT;
leaf = path->nodes[0];
slot = path->slots[0];
}
btrfs_item_key_to_cpu(leaf, &found_key, slot);
if (found_key.objectid != search_key.objectid ||
found_key.type != BTRFS_INODE_REF_KEY)
return -ENOENT;
}
return 0;
}
static int log_new_ancestors_fast(struct btrfs_trans_handle *trans,
struct btrfs_inode *inode,
struct dentry *parent,
struct btrfs_log_ctx *ctx)
{
struct btrfs_root *root = inode->root;
struct btrfs_fs_info *fs_info = root->fs_info;
struct dentry *old_parent = NULL;
struct super_block *sb = inode->vfs_inode.i_sb;
int ret = 0;
while (true) {
if (!parent || d_really_is_negative(parent) ||
sb != parent->d_sb)
break;
inode = BTRFS_I(d_inode(parent));
if (root != inode->root)
break;
if (inode->generation > fs_info->last_trans_committed) {
ret = btrfs_log_inode(trans, root, inode,
LOG_INODE_EXISTS, 0, LLONG_MAX, ctx);
if (ret)
break;
}
if (IS_ROOT(parent))
break;
parent = dget_parent(parent);
dput(old_parent);
old_parent = parent;
}
dput(old_parent);
return ret;
}
static int log_all_new_ancestors(struct btrfs_trans_handle *trans,
struct btrfs_inode *inode,
struct dentry *parent,
struct btrfs_log_ctx *ctx)
{
struct btrfs_root *root = inode->root;
const u64 ino = btrfs_ino(inode);
struct btrfs_path *path;
struct btrfs_key search_key;
int ret;
/*
* For a single hard link case, go through a fast path that does not
* need to iterate the fs/subvolume tree.
*/
if (inode->vfs_inode.i_nlink < 2)
return log_new_ancestors_fast(trans, inode, parent, ctx);
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
search_key.objectid = ino;
search_key.type = BTRFS_INODE_REF_KEY;
search_key.offset = 0;
again:
ret = btrfs_search_slot(NULL, root, &search_key, path, 0, 0);
if (ret < 0)
goto out;
if (ret == 0)
path->slots[0]++;
while (true) {
struct extent_buffer *leaf = path->nodes[0];
int slot = path->slots[0];
struct btrfs_key found_key;
if (slot >= btrfs_header_nritems(leaf)) {
ret = btrfs_next_leaf(root, path);
if (ret < 0)
goto out;
else if (ret > 0)
break;
continue;
}
btrfs_item_key_to_cpu(leaf, &found_key, slot);
if (found_key.objectid != ino ||
found_key.type > BTRFS_INODE_EXTREF_KEY)
break;
/*
* Don't deal with extended references because they are rare
* cases and too complex to deal with (we would need to keep
* track of which subitem we are processing for each item in
* this loop, etc). So just return some error to fallback to
* a transaction commit.
*/
if (found_key.type == BTRFS_INODE_EXTREF_KEY) {
ret = -EMLINK;
goto out;
}
/*
* Logging ancestors needs to do more searches on the fs/subvol
* tree, so it releases the path as needed to avoid deadlocks.
* Keep track of the last inode ref key and resume from that key
* after logging all new ancestors for the current hard link.
*/
memcpy(&search_key, &found_key, sizeof(search_key));
ret = log_new_ancestors(trans, root, path, ctx);
if (ret)
goto out;
btrfs_release_path(path);
goto again;
}
ret = 0;
out:
btrfs_free_path(path);
return ret;
}
/*
* helper function around btrfs_log_inode to make sure newly created
* parent directories also end up in the log. A minimal inode and backref
@ -5836,11 +6033,9 @@ static int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
struct btrfs_root *root = inode->root;
struct btrfs_fs_info *fs_info = root->fs_info;
struct super_block *sb;
struct dentry *old_parent = NULL;
int ret = 0;
u64 last_committed = fs_info->last_trans_committed;
bool log_dentries = false;
struct btrfs_inode *orig_inode = inode;
sb = inode->vfs_inode.i_sb;
@ -5946,56 +6141,22 @@ static int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
* and has a link count of 2.
*/
if (inode->last_unlink_trans > last_committed) {
ret = btrfs_log_all_parents(trans, orig_inode, ctx);
ret = btrfs_log_all_parents(trans, inode, ctx);
if (ret)
goto end_trans;
}
/*
* If a new hard link was added to the inode in the current transaction
* and its link count is now greater than 1, we need to fallback to a
* transaction commit, otherwise we can end up not logging all its new
* parents for all the hard links. Here just from the dentry used to
* fsync, we can not visit the ancestor inodes for all the other hard
* links to figure out if any is new, so we fallback to a transaction
* commit (instead of adding a lot of complexity of scanning a btree,
* since this scenario is not a common use case).
*/
if (inode->vfs_inode.i_nlink > 1 &&
inode->last_link_trans > last_committed) {
ret = -EMLINK;
ret = log_all_new_ancestors(trans, inode, parent, ctx);
if (ret)
goto end_trans;
}
while (1) {
if (!parent || d_really_is_negative(parent) || sb != parent->d_sb)
break;
inode = BTRFS_I(d_inode(parent));
if (root != inode->root)
break;
if (inode->generation > last_committed) {
ret = btrfs_log_inode(trans, root, inode,
LOG_INODE_EXISTS, 0, LLONG_MAX, ctx);
if (ret)
goto end_trans;
}
if (IS_ROOT(parent))
break;
parent = dget_parent(parent);
dput(old_parent);
old_parent = parent;
}
if (log_dentries)
ret = log_new_dir_dentries(trans, root, orig_inode, ctx);
ret = log_new_dir_dentries(trans, root, inode, ctx);
else
ret = 0;
end_trans:
dput(old_parent);
if (ret < 0) {
btrfs_set_log_full_commit(fs_info, trans);
btrfs_set_log_full_commit(trans);
ret = 1;
}

10
fs/btrfs/tree-log.h
View file

@ -30,16 +30,14 @@ static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
INIT_LIST_HEAD(&ctx->list);
}
static inline void btrfs_set_log_full_commit(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans)
static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans)
{
WRITE_ONCE(fs_info->last_trans_log_full_commit, trans->transid);
WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid);
}
static inline int btrfs_need_log_full_commit(struct btrfs_fs_info *fs_info,
struct btrfs_trans_handle *trans)
static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans)
{
return READ_ONCE(fs_info->last_trans_log_full_commit) ==
return READ_ONCE(trans->fs_info->last_trans_log_full_commit) ==
trans->transid;
}

6
fs/btrfs/uuid-tree.c
View file

@ -121,12 +121,12 @@ int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
* An item with that type already exists.
* Extend the item and store the new subid at the end.
*/
btrfs_extend_item(fs_info, path, sizeof(subid_le));
btrfs_extend_item(path, sizeof(subid_le));
eb = path->nodes[0];
slot = path->slots[0];
offset = btrfs_item_ptr_offset(eb, slot);
offset += btrfs_item_size_nr(eb, slot) - sizeof(subid_le);
} else if (ret < 0) {
} else {
btrfs_warn(fs_info,
"insert uuid item failed %d (0x%016llx, 0x%016llx) type %u!",
ret, (unsigned long long)key.objectid,
@ -219,7 +219,7 @@ int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
move_src = offset + sizeof(subid);
move_len = item_size - (move_src - btrfs_item_ptr_offset(eb, slot));
memmove_extent_buffer(eb, move_dst, move_src, move_len);
btrfs_truncate_item(fs_info, path, item_size - sizeof(subid), 1);
btrfs_truncate_item(path, item_size - sizeof(subid), 1);
out:
btrfs_free_path(path);

469
fs/btrfs/volumes.c
View file

@ -27,6 +27,7 @@
#include "math.h"
#include "dev-replace.h"
#include "sysfs.h"
#include "tree-checker.h"
const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = {
[BTRFS_RAID_RAID10] = {
@ -184,8 +185,7 @@ void btrfs_describe_block_groups(u64 bg_flags, char *buf, u32 size_buf)
out_overflow:;
}
static int init_first_rw_device(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
static int init_first_rw_device(struct btrfs_trans_handle *trans);
static int btrfs_relocate_sys_chunks(struct btrfs_fs_info *fs_info);
static void __btrfs_reset_dev_stats(struct btrfs_device *dev);
static void btrfs_dev_stat_print_on_error(struct btrfs_device *dev);
@ -318,7 +318,6 @@ static struct btrfs_fs_devices *alloc_fs_devices(const u8 *fsid,
mutex_init(&fs_devs->device_list_mutex);
INIT_LIST_HEAD(&fs_devs->devices);
INIT_LIST_HEAD(&fs_devs->resized_devices);
INIT_LIST_HEAD(&fs_devs->alloc_list);
INIT_LIST_HEAD(&fs_devs->fs_list);
if (fsid)
@ -334,7 +333,9 @@ static struct btrfs_fs_devices *alloc_fs_devices(const u8 *fsid,
void btrfs_free_device(struct btrfs_device *device)
{
WARN_ON(!list_empty(&device->post_commit_list));
rcu_string_free(device->name);
extent_io_tree_release(&device->alloc_state);
bio_put(device->flush_bio);
kfree(device);
}
@ -402,7 +403,7 @@ static struct btrfs_device *__alloc_device(void)
INIT_LIST_HEAD(&dev->dev_list);
INIT_LIST_HEAD(&dev->dev_alloc_list);
INIT_LIST_HEAD(&dev->resized_list);
INIT_LIST_HEAD(&dev->post_commit_list);
spin_lock_init(&dev->io_lock);
@ -411,6 +412,7 @@ static struct btrfs_device *__alloc_device(void)
btrfs_device_data_ordered_init(dev);
INIT_RADIX_TREE(&dev->reada_zones, GFP_NOFS & ~__GFP_DIRECT_RECLAIM);
INIT_RADIX_TREE(&dev->reada_extents, GFP_NOFS & ~__GFP_DIRECT_RECLAIM);
extent_io_tree_init(NULL, &dev->alloc_state, 0, NULL);
return dev;
}
@ -1230,14 +1232,6 @@ again:
mutex_unlock(&uuid_mutex);
}
static void free_device_rcu(struct rcu_head *head)
{
struct btrfs_device *device;
device = container_of(head, struct btrfs_device, rcu);
btrfs_free_device(device);
}
static void btrfs_close_bdev(struct btrfs_device *device)
{
if (!device->bdev)
@ -1285,7 +1279,8 @@ static void btrfs_close_one_device(struct btrfs_device *device)
list_replace_rcu(&device->dev_list, &new_device->dev_list);
new_device->fs_devices = device->fs_devices;
call_rcu(&device->rcu, free_device_rcu);
synchronize_rcu();
btrfs_free_device(device);
}
static int close_fs_devices(struct btrfs_fs_devices *fs_devices)
@ -1505,58 +1500,29 @@ error_bdev_put:
return device;
}
static int contains_pending_extent(struct btrfs_transaction *transaction,
struct btrfs_device *device,
u64 *start, u64 len)
/*
* Try to find a chunk that intersects [start, start + len] range and when one
* such is found, record the end of it in *start
*/
static bool contains_pending_extent(struct btrfs_device *device, u64 *start,
u64 len)
{
struct btrfs_fs_info *fs_info = device->fs_info;
struct extent_map *em;
struct list_head *search_list = &fs_info->pinned_chunks;
int ret = 0;
u64 physical_start = *start;
u64 physical_start, physical_end;
if (transaction)
search_list = &transaction->pending_chunks;
again:
list_for_each_entry(em, search_list, list) {
struct map_lookup *map;
int i;
lockdep_assert_held(&device->fs_info->chunk_mutex);
map = em->map_lookup;
for (i = 0; i < map->num_stripes; i++) {
u64 end;
if (!find_first_extent_bit(&device->alloc_state, *start,
&physical_start, &physical_end,
CHUNK_ALLOCATED, NULL)) {
if (map->stripes[i].dev != device)
continue;
if (map->stripes[i].physical >= physical_start + len ||
map->stripes[i].physical + em->orig_block_len <=
physical_start)
continue;
/*
* Make sure that while processing the pinned list we do
* not override our *start with a lower value, because
* we can have pinned chunks that fall within this
* device hole and that have lower physical addresses
* than the pending chunks we processed before. If we
* do not take this special care we can end up getting
* 2 pending chunks that start at the same physical
* device offsets because the end offset of a pinned
* chunk can be equal to the start offset of some
* pending chunk.
*/
end = map->stripes[i].physical + em->orig_block_len;
if (end > *start) {
*start = end;
ret = 1;
}
if (in_range(physical_start, *start, len) ||
in_range(*start, physical_start,
physical_end - physical_start)) {
*start = physical_end + 1;
return true;
}
}
if (search_list != &fs_info->pinned_chunks) {
search_list = &fs_info->pinned_chunks;
goto again;
}
return ret;
return false;
}
@ -1581,8 +1547,7 @@ again:
* But if we don't find suitable free space, it is used to store the size of
* the max free space.
*/
int find_free_dev_extent_start(struct btrfs_transaction *transaction,
struct btrfs_device *device, u64 num_bytes,
int find_free_dev_extent_start(struct btrfs_device *device, u64 num_bytes,
u64 search_start, u64 *start, u64 *len)
{
struct btrfs_fs_info *fs_info = device->fs_info;
@ -1667,15 +1632,12 @@ again:
* Have to check before we set max_hole_start, otherwise
* we could end up sending back this offset anyway.
*/
if (contains_pending_extent(transaction, device,
&search_start,
if (contains_pending_extent(device, &search_start,
hole_size)) {
if (key.offset >= search_start) {
if (key.offset >= search_start)
hole_size = key.offset - search_start;
} else {
WARN_ON_ONCE(1);
else
hole_size = 0;
}
}
if (hole_size > max_hole_size) {
@ -1716,8 +1678,7 @@ next:
if (search_end > search_start) {
hole_size = search_end - search_start;
if (contains_pending_extent(transaction, device, &search_start,
hole_size)) {
if (contains_pending_extent(device, &search_start, hole_size)) {
btrfs_release_path(path);
goto again;
}
@ -1742,13 +1703,11 @@ out:
return ret;
}
int find_free_dev_extent(struct btrfs_trans_handle *trans,
struct btrfs_device *device, u64 num_bytes,
int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes,
u64 *start, u64 *len)
{
/* FIXME use last free of some kind */
return find_free_dev_extent_start(trans->transaction, device,
num_bytes, 0, start, len);
return find_free_dev_extent_start(device, num_bytes, 0, start, len);
}
static int btrfs_free_dev_extent(struct btrfs_trans_handle *trans,
@ -1982,10 +1941,9 @@ static void update_dev_time(const char *path_name)
filp_close(filp, NULL);
}
static int btrfs_rm_dev_item(struct btrfs_fs_info *fs_info,
struct btrfs_device *device)
static int btrfs_rm_dev_item(struct btrfs_device *device)
{
struct btrfs_root *root = fs_info->chunk_root;
struct btrfs_root *root = device->fs_info->chunk_root;
int ret;
struct btrfs_path *path;
struct btrfs_key key;
@ -2186,12 +2144,12 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info, const char *device_path,
* counter although write_all_supers() is not locked out. This
* could give a filesystem state which requires a degraded mount.
*/
ret = btrfs_rm_dev_item(fs_info, device);
ret = btrfs_rm_dev_item(device);
if (ret)
goto error_undo;
clear_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state);
btrfs_scrub_cancel_dev(fs_info, device);
btrfs_scrub_cancel_dev(device);
/*
* the device list mutex makes sure that we don't change
@ -2242,7 +2200,8 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info, const char *device_path,
btrfs_scratch_superblocks(device->bdev, device->name->str);
btrfs_close_bdev(device);
call_rcu(&device->rcu, free_device_rcu);
synchronize_rcu();
btrfs_free_device(device);
if (cur_devices->open_devices == 0) {
while (fs_devices) {
@ -2299,9 +2258,9 @@ void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_device *srcdev)
fs_devices->open_devices--;
}
void btrfs_rm_dev_replace_free_srcdev(struct btrfs_fs_info *fs_info,
struct btrfs_device *srcdev)
void btrfs_rm_dev_replace_free_srcdev(struct btrfs_device *srcdev)
{
struct btrfs_fs_info *fs_info = srcdev->fs_info;
struct btrfs_fs_devices *fs_devices = srcdev->fs_devices;
if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &srcdev->dev_state)) {
@ -2310,7 +2269,8 @@ void btrfs_rm_dev_replace_free_srcdev(struct btrfs_fs_info *fs_info,
}
btrfs_close_bdev(srcdev);
call_rcu(&srcdev->rcu, free_device_rcu);
synchronize_rcu();
btrfs_free_device(srcdev);
/* if this is no devs we rather delete the fs_devices */
if (!fs_devices->num_devices) {
@ -2368,7 +2328,8 @@ void btrfs_destroy_dev_replace_tgtdev(struct btrfs_device *tgtdev)
btrfs_scratch_superblocks(tgtdev->bdev, tgtdev->name->str);
btrfs_close_bdev(tgtdev);
call_rcu(&tgtdev->rcu, free_device_rcu);
synchronize_rcu();
btrfs_free_device(tgtdev);
}
static struct btrfs_device *btrfs_find_device_by_path(
@ -2503,9 +2464,9 @@ static int btrfs_prepare_sprout(struct btrfs_fs_info *fs_info)
/*
* Store the expected generation for seed devices in device items.
*/
static int btrfs_finish_sprout(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info)
static int btrfs_finish_sprout(struct btrfs_trans_handle *trans)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
struct btrfs_root *root = fs_info->chunk_root;
struct btrfs_path *path;
struct extent_buffer *leaf;
@ -2705,7 +2666,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
if (seeding_dev) {
mutex_lock(&fs_info->chunk_mutex);
ret = init_first_rw_device(trans, fs_info);
ret = init_first_rw_device(trans);
mutex_unlock(&fs_info->chunk_mutex);
if (ret) {
btrfs_abort_transaction(trans, ret);
@ -2722,7 +2683,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
if (seeding_dev) {
char fsid_buf[BTRFS_UUID_UNPARSED_SIZE];
ret = btrfs_finish_sprout(trans, fs_info);
ret = btrfs_finish_sprout(trans);
if (ret) {
btrfs_abort_transaction(trans, ret);
goto error_sysfs;
@ -2852,7 +2813,6 @@ int btrfs_grow_device(struct btrfs_trans_handle *trans,
{
struct btrfs_fs_info *fs_info = device->fs_info;
struct btrfs_super_block *super_copy = fs_info->super_copy;
struct btrfs_fs_devices *fs_devices;
u64 old_total;
u64 diff;
@ -2871,8 +2831,6 @@ int btrfs_grow_device(struct btrfs_trans_handle *trans,
return -EINVAL;
}
fs_devices = fs_info->fs_devices;
btrfs_set_super_total_bytes(super_copy,
round_down(old_total + diff, fs_info->sectorsize));
device->fs_devices->total_rw_bytes += diff;
@ -2880,9 +2838,9 @@ int btrfs_grow_device(struct btrfs_trans_handle *trans,
btrfs_device_set_total_bytes(device, new_size);
btrfs_device_set_disk_total_bytes(device, new_size);
btrfs_clear_space_info_full(device->fs_info);
if (list_empty(&device->resized_list))
list_add_tail(&device->resized_list,
&fs_devices->resized_devices);
if (list_empty(&device->post_commit_list))
list_add_tail(&device->post_commit_list,
&trans->transaction->dev_update_list);
mutex_unlock(&fs_info->chunk_mutex);
return btrfs_update_device(trans, device);
@ -3601,10 +3559,10 @@ static int chunk_soft_convert_filter(u64 chunk_type,
return 0;
}
static int should_balance_chunk(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf,
static int should_balance_chunk(struct extent_buffer *leaf,
struct btrfs_chunk *chunk, u64 chunk_offset)
{
struct btrfs_fs_info *fs_info = leaf->fs_info;
struct btrfs_balance_control *bctl = fs_info->balance_ctl;
struct btrfs_balance_args *bargs = NULL;
u64 chunk_type = btrfs_chunk_type(leaf, chunk);
@ -3784,8 +3742,7 @@ again:
spin_unlock(&fs_info->balance_lock);
}
ret = should_balance_chunk(fs_info, leaf, chunk,
found_key.offset);
ret = should_balance_chunk(leaf, chunk, found_key.offset);
btrfs_release_path(path);
if (!ret) {
@ -4661,8 +4618,7 @@ int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info)
if (IS_ERR(trans))
return PTR_ERR(trans);
uuid_root = btrfs_create_tree(trans, fs_info,
BTRFS_UUID_TREE_OBJECTID);
uuid_root = btrfs_create_tree(trans, BTRFS_UUID_TREE_OBJECTID);
if (IS_ERR(uuid_root)) {
ret = PTR_ERR(uuid_root);
btrfs_abort_transaction(trans, ret);
@ -4722,15 +4678,16 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size)
int slot;
int failed = 0;
bool retried = false;
bool checked_pending_chunks = false;
struct extent_buffer *l;
struct btrfs_key key;
struct btrfs_super_block *super_copy = fs_info->super_copy;
u64 old_total = btrfs_super_total_bytes(super_copy);
u64 old_size = btrfs_device_get_total_bytes(device);
u64 diff;
u64 start;
new_size = round_down(new_size, fs_info->sectorsize);
start = new_size;
diff = round_down(old_size - new_size, fs_info->sectorsize);
if (test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state))
@ -4742,6 +4699,12 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size)
path->reada = READA_BACK;
trans = btrfs_start_transaction(root, 0);
if (IS_ERR(trans)) {
btrfs_free_path(path);
return PTR_ERR(trans);
}
mutex_lock(&fs_info->chunk_mutex);
btrfs_device_set_total_bytes(device, new_size);
@ -4749,7 +4712,21 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size)
device->fs_devices->total_rw_bytes -= diff;
atomic64_sub(diff, &fs_info->free_chunk_space);
}
mutex_unlock(&fs_info->chunk_mutex);
/*
* Once the device's size has been set to the new size, ensure all
* in-memory chunks are synced to disk so that the loop below sees them
* and relocates them accordingly.
*/
if (contains_pending_extent(device, &start, diff)) {
mutex_unlock(&fs_info->chunk_mutex);
ret = btrfs_commit_transaction(trans);
if (ret)
goto done;
} else {
mutex_unlock(&fs_info->chunk_mutex);
btrfs_end_transaction(trans);
}
again:
key.objectid = device->devid;
@ -4840,40 +4817,10 @@ again:
}
mutex_lock(&fs_info->chunk_mutex);
/*
* We checked in the above loop all device extents that were already in
* the device tree. However before we have updated the device's
* total_bytes to the new size, we might have had chunk allocations that
* have not complete yet (new block groups attached to transaction
* handles), and therefore their device extents were not yet in the
* device tree and we missed them in the loop above. So if we have any
* pending chunk using a device extent that overlaps the device range
* that we can not use anymore, commit the current transaction and
* repeat the search on the device tree - this way we guarantee we will
* not have chunks using device extents that end beyond 'new_size'.
*/
if (!checked_pending_chunks) {
u64 start = new_size;
u64 len = old_size - new_size;
if (contains_pending_extent(trans->transaction, device,
&start, len)) {
mutex_unlock(&fs_info->chunk_mutex);
checked_pending_chunks = true;
failed = 0;
retried = false;
ret = btrfs_commit_transaction(trans);
if (ret)
goto done;
goto again;
}
}
btrfs_device_set_disk_total_bytes(device, new_size);
if (list_empty(&device->resized_list))
list_add_tail(&device->resized_list,
&fs_info->fs_devices->resized_devices);
if (list_empty(&device->post_commit_list))
list_add_tail(&device->post_commit_list,
&trans->transaction->dev_update_list);
WARN_ON(diff > old_total);
btrfs_set_super_total_bytes(super_copy,
@ -4957,15 +4904,6 @@ static void check_raid56_incompat_flag(struct btrfs_fs_info *info, u64 type)
btrfs_set_fs_incompat(info, RAID56);
}
#define BTRFS_MAX_DEVS(info) ((BTRFS_MAX_ITEM_SIZE(info) \
- sizeof(struct btrfs_chunk)) \
/ sizeof(struct btrfs_stripe) + 1)
#define BTRFS_MAX_DEVS_SYS_CHUNK ((BTRFS_SYSTEM_CHUNK_ARRAY_SIZE \
- 2 * sizeof(struct btrfs_disk_key) \
- 2 * sizeof(struct btrfs_chunk)) \
/ sizeof(struct btrfs_stripe) + 1)
static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
u64 start, u64 type)
{
@ -5038,7 +4976,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
} else {
btrfs_err(info, "invalid chunk type 0x%llx requested",
type);
BUG_ON(1);
BUG();
}
/* We don't want a chunk larger than 10% of writable space */
@ -5079,7 +5017,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
if (total_avail == 0)
continue;
ret = find_free_dev_extent(trans, device,
ret = find_free_dev_extent(device,
max_stripe_size * dev_stripes,
&dev_offset, &max_avail);
if (ret && ret != -ENOSPC)
@ -5213,18 +5151,20 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
free_extent_map(em);
goto error;
}
list_add_tail(&em->list, &trans->transaction->pending_chunks);
refcount_inc(&em->refs);
write_unlock(&em_tree->lock);
ret = btrfs_make_block_group(trans, 0, type, start, chunk_size);
if (ret)
goto error_del_extent;
for (i = 0; i < map->num_stripes; i++)
btrfs_device_set_bytes_used(map->stripes[i].dev,
map->stripes[i].dev->bytes_used + stripe_size);
for (i = 0; i < map->num_stripes; i++) {
struct btrfs_device *dev = map->stripes[i].dev;
btrfs_device_set_bytes_used(dev, dev->bytes_used + stripe_size);
if (list_empty(&dev->post_commit_list))
list_add_tail(&dev->post_commit_list,
&trans->transaction->dev_update_list);
}
atomic64_sub(stripe_size * map->num_stripes, &info->free_chunk_space);
@ -5243,8 +5183,6 @@ error_del_extent:
free_extent_map(em);
/* One for the tree reference */
free_extent_map(em);
/* One for the pending_chunks list reference */
free_extent_map(em);
error:
kfree(devices_info);
return ret;
@ -5364,9 +5302,9 @@ int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, u64 type)
return __btrfs_alloc_chunk(trans, chunk_offset, type);
}
static noinline int init_first_rw_device(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info)
static noinline int init_first_rw_device(struct btrfs_trans_handle *trans)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
u64 chunk_offset;
u64 sys_chunk_offset;
u64 alloc_profile;
@ -6714,99 +6652,6 @@ struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info,
return dev;
}
/* Return -EIO if any error, otherwise return 0. */
static int btrfs_check_chunk_valid(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf,
struct btrfs_chunk *chunk, u64 logical)
{
u64 length;
u64 stripe_len;
u16 num_stripes;
u16 sub_stripes;
u64 type;
u64 features;
bool mixed = false;
length = btrfs_chunk_length(leaf, chunk);
stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
sub_stripes = btrfs_chunk_sub_stripes(leaf, chunk);
type = btrfs_chunk_type(leaf, chunk);
if (!num_stripes) {
btrfs_err(fs_info, "invalid chunk num_stripes: %u",
num_stripes);
return -EIO;
}
if (!IS_ALIGNED(logical, fs_info->sectorsize)) {
btrfs_err(fs_info, "invalid chunk logical %llu", logical);
return -EIO;
}
if (btrfs_chunk_sector_size(leaf, chunk) != fs_info->sectorsize) {
btrfs_err(fs_info, "invalid chunk sectorsize %u",
btrfs_chunk_sector_size(leaf, chunk));
return -EIO;
}
if (!length || !IS_ALIGNED(length, fs_info->sectorsize)) {
btrfs_err(fs_info, "invalid chunk length %llu", length);
return -EIO;
}
if (!is_power_of_2(stripe_len) || stripe_len != BTRFS_STRIPE_LEN) {
btrfs_err(fs_info, "invalid chunk stripe length: %llu",
stripe_len);
return -EIO;
}
if (~(BTRFS_BLOCK_GROUP_TYPE_MASK | BTRFS_BLOCK_GROUP_PROFILE_MASK) &
type) {
btrfs_err(fs_info, "unrecognized chunk type: %llu",
~(BTRFS_BLOCK_GROUP_TYPE_MASK |
BTRFS_BLOCK_GROUP_PROFILE_MASK) &
btrfs_chunk_type(leaf, chunk));
return -EIO;
}
if ((type & BTRFS_BLOCK_GROUP_TYPE_MASK) == 0) {
btrfs_err(fs_info, "missing chunk type flag: 0x%llx", type);
return -EIO;
}
if ((type & BTRFS_BLOCK_GROUP_SYSTEM) &&
(type & (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA))) {
btrfs_err(fs_info,
"system chunk with data or metadata type: 0x%llx", type);
return -EIO;
}
features = btrfs_super_incompat_flags(fs_info->super_copy);
if (features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
mixed = true;
if (!mixed) {
if ((type & BTRFS_BLOCK_GROUP_METADATA) &&
(type & BTRFS_BLOCK_GROUP_DATA)) {
btrfs_err(fs_info,
"mixed chunk type in non-mixed mode: 0x%llx", type);
return -EIO;
}
}
if ((type & BTRFS_BLOCK_GROUP_RAID10 && sub_stripes != 2) ||
(type & BTRFS_BLOCK_GROUP_RAID1 && num_stripes != 2) ||
(type & BTRFS_BLOCK_GROUP_RAID5 && num_stripes < 2) ||
(type & BTRFS_BLOCK_GROUP_RAID6 && num_stripes < 3) ||
(type & BTRFS_BLOCK_GROUP_DUP && num_stripes != 2) ||
((type & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 &&
num_stripes != 1)) {
btrfs_err(fs_info,
"invalid num_stripes:sub_stripes %u:%u for profile %llu",
num_stripes, sub_stripes,
type & BTRFS_BLOCK_GROUP_PROFILE_MASK);
return -EIO;
}
return 0;
}
static void btrfs_report_missing_device(struct btrfs_fs_info *fs_info,
u64 devid, u8 *uuid, bool error)
{
@ -6818,10 +6663,30 @@ static void btrfs_report_missing_device(struct btrfs_fs_info *fs_info,
devid, uuid);
}
static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
struct extent_buffer *leaf,
static u64 calc_stripe_length(u64 type, u64 chunk_len, int num_stripes)
{
int index = btrfs_bg_flags_to_raid_index(type);
int ncopies = btrfs_raid_array[index].ncopies;
int data_stripes;
switch (type & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
case BTRFS_BLOCK_GROUP_RAID5:
data_stripes = num_stripes - 1;
break;
case BTRFS_BLOCK_GROUP_RAID6:
data_stripes = num_stripes - 2;
break;
default:
data_stripes = num_stripes / ncopies;
break;
}
return div_u64(chunk_len, data_stripes);
}
static int read_one_chunk(struct btrfs_key *key, struct extent_buffer *leaf,
struct btrfs_chunk *chunk)
{
struct btrfs_fs_info *fs_info = leaf->fs_info;
struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
struct map_lookup *map;
struct extent_map *em;
@ -6837,9 +6702,15 @@ static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
length = btrfs_chunk_length(leaf, chunk);
num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
ret = btrfs_check_chunk_valid(fs_info, leaf, chunk, logical);
if (ret)
return ret;
/*
* Only need to verify chunk item if we're reading from sys chunk array,
* as chunk item in tree block is already verified by tree-checker.
*/
if (leaf->start == BTRFS_SUPER_INFO_OFFSET) {
ret = btrfs_check_chunk_valid(leaf, chunk, logical);
if (ret)
return ret;
}
read_lock(&map_tree->map_tree.lock);
em = lookup_extent_mapping(&map_tree->map_tree, logical, 1);
@ -6877,6 +6748,8 @@ static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
map->type = btrfs_chunk_type(leaf, chunk);
map->sub_stripes = btrfs_chunk_sub_stripes(leaf, chunk);
map->verified_stripes = 0;
em->orig_block_len = calc_stripe_length(map->type, em->len,
map->num_stripes);
for (i = 0; i < num_stripes; i++) {
map->stripes[i].physical =
btrfs_stripe_offset_nr(leaf, chunk, i);
@ -7001,10 +6874,10 @@ out:
return fs_devices;
}
static int read_one_dev(struct btrfs_fs_info *fs_info,
struct extent_buffer *leaf,
static int read_one_dev(struct extent_buffer *leaf,
struct btrfs_dev_item *dev_item)
{
struct btrfs_fs_info *fs_info = leaf->fs_info;
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
struct btrfs_device *device;
u64 devid;
@ -7193,7 +7066,7 @@ int btrfs_read_sys_array(struct btrfs_fs_info *fs_info)
if (cur_offset + len > array_size)
goto out_short_read;
ret = read_one_chunk(fs_info, &key, sb, chunk);
ret = read_one_chunk(&key, sb, chunk);
if (ret)
break;
} else {
@ -7334,14 +7207,14 @@ int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info)
struct btrfs_dev_item *dev_item;
dev_item = btrfs_item_ptr(leaf, slot,
struct btrfs_dev_item);
ret = read_one_dev(fs_info, leaf, dev_item);
ret = read_one_dev(leaf, dev_item);
if (ret)
goto error;
total_dev++;
} else if (found_key.type == BTRFS_CHUNK_ITEM_KEY) {
struct btrfs_chunk *chunk;
chunk = btrfs_item_ptr(leaf, slot, struct btrfs_chunk);
ret = read_one_chunk(fs_info, &found_key, leaf, chunk);
ret = read_one_chunk(&found_key, leaf, chunk);
if (ret)
goto error;
}
@ -7530,9 +7403,9 @@ out:
/*
* called from commit_transaction. Writes all changed device stats to disk.
*/
int btrfs_run_dev_stats(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info)
int btrfs_run_dev_stats(struct btrfs_trans_handle *trans)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
struct btrfs_device *device;
int stats_cnt;
@ -7674,51 +7547,34 @@ void btrfs_scratch_superblocks(struct block_device *bdev, const char *device_pat
}
/*
* Update the size of all devices, which is used for writing out the
* super blocks.
* Update the size and bytes used for each device where it changed. This is
* delayed since we would otherwise get errors while writing out the
* superblocks.
*
* Must be invoked during transaction commit.
*/
void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info)
void btrfs_commit_device_sizes(struct btrfs_transaction *trans)
{
struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
struct btrfs_device *curr, *next;
if (list_empty(&fs_devices->resized_devices))
ASSERT(trans->state == TRANS_STATE_COMMIT_DOING);
if (list_empty(&trans->dev_update_list))
return;
mutex_lock(&fs_devices->device_list_mutex);
mutex_lock(&fs_info->chunk_mutex);
list_for_each_entry_safe(curr, next, &fs_devices->resized_devices,
resized_list) {
list_del_init(&curr->resized_list);
/*
* We don't need the device_list_mutex here. This list is owned by the
* transaction and the transaction must complete before the device is
* released.
*/
mutex_lock(&trans->fs_info->chunk_mutex);
list_for_each_entry_safe(curr, next, &trans->dev_update_list,
post_commit_list) {
list_del_init(&curr->post_commit_list);
curr->commit_total_bytes = curr->disk_total_bytes;
curr->commit_bytes_used = curr->bytes_used;
}
mutex_unlock(&fs_info->chunk_mutex);
mutex_unlock(&fs_devices->device_list_mutex);
}
/* Must be invoked during the transaction commit */
void btrfs_update_commit_device_bytes_used(struct btrfs_transaction *trans)
{
struct btrfs_fs_info *fs_info = trans->fs_info;
struct extent_map *em;
struct map_lookup *map;
struct btrfs_device *dev;
int i;
if (list_empty(&trans->pending_chunks))
return;
/* In order to kick the device replace finish process */
mutex_lock(&fs_info->chunk_mutex);
list_for_each_entry(em, &trans->pending_chunks, list) {
map = em->map_lookup;
for (i = 0; i < map->num_stripes; i++) {
dev = map->stripes[i].dev;
dev->commit_bytes_used = dev->bytes_used;
}
}
mutex_unlock(&fs_info->chunk_mutex);
mutex_unlock(&trans->fs_info->chunk_mutex);
}
void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info)
@ -7751,25 +7607,6 @@ int btrfs_bg_type_to_factor(u64 flags)
}
static u64 calc_stripe_length(u64 type, u64 chunk_len, int num_stripes)
{
int index = btrfs_bg_flags_to_raid_index(type);
int ncopies = btrfs_raid_array[index].ncopies;
int data_stripes;
switch (type & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
case BTRFS_BLOCK_GROUP_RAID5:
data_stripes = num_stripes - 1;
break;
case BTRFS_BLOCK_GROUP_RAID6:
data_stripes = num_stripes - 2;
break;
default:
data_stripes = num_stripes / ncopies;
break;
}
return div_u64(chunk_len, data_stripes);
}
static int verify_one_dev_extent(struct btrfs_fs_info *fs_info,
u64 chunk_offset, u64 devid,

39
fs/btrfs/volumes.h
View file

@ -45,6 +45,7 @@ struct btrfs_pending_bios {
struct btrfs_device {
struct list_head dev_list;
struct list_head dev_alloc_list;
struct list_head post_commit_list; /* chunk mutex */
struct btrfs_fs_devices *fs_devices;
struct btrfs_fs_info *fs_info;
@ -102,18 +103,12 @@ struct btrfs_device {
* size of the device on the current transaction
*
* This variant is update when committing the transaction,
* and protected by device_list_mutex
* and protected by chunk mutex
*/
u64 commit_total_bytes;
/* bytes used on the current transaction */
u64 commit_bytes_used;
/*
* used to manage the device which is resized
*
* It is protected by chunk_lock.
*/
struct list_head resized_list;
/* for sending down flush barriers */
struct bio *flush_bio;
@ -123,7 +118,6 @@ struct btrfs_device {
struct scrub_ctx *scrub_ctx;
struct btrfs_work work;
struct rcu_head rcu;
/* readahead state */
atomic_t reada_in_flight;
@ -139,6 +133,8 @@ struct btrfs_device {
/* Counter to record the change of device stats */
atomic_t dev_stats_ccnt;
atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX];
struct extent_io_tree alloc_state;
};
/*
@ -235,7 +231,6 @@ struct btrfs_fs_devices {
struct mutex device_list_mutex;
struct list_head devices;
struct list_head resized_devices;
/* devices not currently being allocated */
struct list_head alloc_list;
@ -258,6 +253,15 @@ struct btrfs_fs_devices {
#define BTRFS_BIO_INLINE_CSUM_SIZE 64
#define BTRFS_MAX_DEVS(info) ((BTRFS_MAX_ITEM_SIZE(info) \
- sizeof(struct btrfs_chunk)) \
/ sizeof(struct btrfs_stripe) + 1)
#define BTRFS_MAX_DEVS_SYS_CHUNK ((BTRFS_SYSTEM_CHUNK_ARRAY_SIZE \
- 2 * sizeof(struct btrfs_disk_key) \
- 2 * sizeof(struct btrfs_chunk)) \
/ sizeof(struct btrfs_stripe) + 1)
/*
* we need the mirror number and stripe index to be passed around
* the call chain while we are processing end_io (especially errors).
@ -449,22 +453,18 @@ int btrfs_cancel_balance(struct btrfs_fs_info *fs_info);
int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info);
int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info);
int btrfs_chunk_readonly(struct btrfs_fs_info *fs_info, u64 chunk_offset);
int find_free_dev_extent_start(struct btrfs_transaction *transaction,
struct btrfs_device *device, u64 num_bytes,
u64 search_start, u64 *start, u64 *max_avail);
int find_free_dev_extent(struct btrfs_trans_handle *trans,
struct btrfs_device *device, u64 num_bytes,
int find_free_dev_extent_start(struct btrfs_device *device, u64 num_bytes,
u64 search_start, u64 *start, u64 *max_avail);
int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes,
u64 *start, u64 *max_avail);
void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index);
int btrfs_get_dev_stats(struct btrfs_fs_info *fs_info,
struct btrfs_ioctl_get_dev_stats *stats);
void btrfs_init_devices_late(struct btrfs_fs_info *fs_info);
int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info);
int btrfs_run_dev_stats(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
int btrfs_run_dev_stats(struct btrfs_trans_handle *trans);
void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_device *srcdev);
void btrfs_rm_dev_replace_free_srcdev(struct btrfs_fs_info *fs_info,
struct btrfs_device *srcdev);
void btrfs_rm_dev_replace_free_srcdev(struct btrfs_device *srcdev);
void btrfs_destroy_dev_replace_tgtdev(struct btrfs_device *tgtdev);
void btrfs_scratch_superblocks(struct block_device *bdev, const char *device_path);
int btrfs_is_parity_mirror(struct btrfs_fs_info *fs_info,
@ -558,8 +558,7 @@ static inline enum btrfs_raid_types btrfs_bg_flags_to_raid_index(u64 flags)
const char *get_raid_name(enum btrfs_raid_types type);
void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info);
void btrfs_update_commit_device_bytes_used(struct btrfs_transaction *trans);
void btrfs_commit_device_sizes(struct btrfs_transaction *trans);
struct list_head *btrfs_get_fs_uuids(void);
void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info);

65
fs/btrfs/xattr.c
View file

@ -76,9 +76,8 @@ out:
return ret;
}
static int do_setxattr(struct btrfs_trans_handle *trans,
struct inode *inode, const char *name,
const void *value, size_t size, int flags)
int btrfs_setxattr(struct btrfs_trans_handle *trans, struct inode *inode,
const char *name, const void *value, size_t size, int flags)
{
struct btrfs_dir_item *di = NULL;
struct btrfs_root *root = BTRFS_I(inode)->root;
@ -87,6 +86,8 @@ static int do_setxattr(struct btrfs_trans_handle *trans,
size_t name_len = strlen(name);
int ret = 0;
ASSERT(trans);
if (name_len + size > BTRFS_MAX_XATTR_SIZE(root->fs_info))
return -ENOSPC;
@ -174,7 +175,7 @@ static int do_setxattr(struct btrfs_trans_handle *trans,
char *ptr;
if (size > old_data_len) {
if (btrfs_leaf_free_space(fs_info, leaf) <
if (btrfs_leaf_free_space(leaf) <
(size - old_data_len)) {
ret = -ENOSPC;
goto out;
@ -184,17 +185,15 @@ static int do_setxattr(struct btrfs_trans_handle *trans,
if (old_data_len + name_len + sizeof(*di) == item_size) {
/* No other xattrs packed in the same leaf item. */
if (size > old_data_len)
btrfs_extend_item(fs_info, path,
size - old_data_len);
btrfs_extend_item(path, size - old_data_len);
else if (size < old_data_len)
btrfs_truncate_item(fs_info, path,
data_size, 1);
btrfs_truncate_item(path, data_size, 1);
} else {
/* There are other xattrs packed in the same item. */
ret = btrfs_delete_one_dir_name(trans, root, path, di);
if (ret)
goto out;
btrfs_extend_item(fs_info, path, data_size);
btrfs_extend_item(path, data_size);
}
item = btrfs_item_nr(slot);
@ -220,24 +219,18 @@ out:
/*
* @value: "" makes the attribute to empty, NULL removes it
*/
int btrfs_setxattr(struct btrfs_trans_handle *trans,
struct inode *inode, const char *name,
const void *value, size_t size, int flags)
int btrfs_setxattr_trans(struct inode *inode, const char *name,
const void *value, size_t size, int flags)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_trans_handle *trans;
int ret;
if (btrfs_root_readonly(root))
return -EROFS;
if (trans)
return do_setxattr(trans, inode, name, value, size, flags);
trans = btrfs_start_transaction(root, 2);
if (IS_ERR(trans))
return PTR_ERR(trans);
ret = do_setxattr(trans, inode, name, value, size, flags);
ret = btrfs_setxattr(trans, inode, name, value, size, flags);
if (ret)
goto out;
@ -370,7 +363,7 @@ static int btrfs_xattr_handler_set(const struct xattr_handler *handler,
size_t size, int flags)
{
name = xattr_full_name(handler, name);
return btrfs_setxattr(NULL, inode, name, buffer, size, flags);
return btrfs_setxattr_trans(inode, name, buffer, size, flags);
}
static int btrfs_xattr_handler_set_prop(const struct xattr_handler *handler,
@ -378,8 +371,32 @@ static int btrfs_xattr_handler_set_prop(const struct xattr_handler *handler,
const char *name, const void *value,
size_t size, int flags)
{
int ret;
struct btrfs_trans_handle *trans;
struct btrfs_root *root = BTRFS_I(inode)->root;
name = xattr_full_name(handler, name);
return btrfs_set_prop(inode, name, value, size, flags);
ret = btrfs_validate_prop(name, value, size);
if (ret)
return ret;
trans = btrfs_start_transaction(root, 2);
if (IS_ERR(trans))
return PTR_ERR(trans);
ret = btrfs_set_prop(trans, inode, name, value, size, flags);
if (!ret) {
inode_inc_iversion(inode);
inode->i_ctime = current_time(inode);
set_bit(BTRFS_INODE_COPY_EVERYTHING,
&BTRFS_I(inode)->runtime_flags);
ret = btrfs_update_inode(trans, root, inode);
BUG_ON(ret);
}
btrfs_end_transaction(trans);
return ret;
}
static const struct xattr_handler btrfs_security_xattr_handler = {
@ -419,10 +436,10 @@ const struct xattr_handler *btrfs_xattr_handlers[] = {
};
static int btrfs_initxattrs(struct inode *inode,
const struct xattr *xattr_array, void *fs_info)
const struct xattr *xattr_array, void *fs_private)
{
struct btrfs_trans_handle *trans = fs_private;
const struct xattr *xattr;
struct btrfs_trans_handle *trans = fs_info;
unsigned int nofs_flag;
char *name;
int err = 0;
@ -442,7 +459,7 @@ static int btrfs_initxattrs(struct inode *inode,
strcpy(name, XATTR_SECURITY_PREFIX);
strcpy(name + XATTR_SECURITY_PREFIX_LEN, xattr->name);
err = btrfs_setxattr(trans, inode, name, xattr->value,
xattr->value_len, 0);
xattr->value_len, 0);
kfree(name);
if (err < 0)
break;

7
fs/btrfs/xattr.h
View file

@ -12,9 +12,10 @@ extern const struct xattr_handler *btrfs_xattr_handlers[];
int btrfs_getxattr(struct inode *inode, const char *name,
void *buffer, size_t size);
int btrfs_setxattr(struct btrfs_trans_handle *trans,
struct inode *inode, const char *name,
const void *value, size_t size, int flags);
int btrfs_setxattr(struct btrfs_trans_handle *trans, struct inode *inode,
const char *name, const void *value, size_t size, int flags);
int btrfs_setxattr_trans(struct inode *inode, const char *name,
const void *value, size_t size, int flags);
ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
int btrfs_xattr_security_init(struct btrfs_trans_handle *trans,

11
fs/btrfs/zstd.c
View file

@ -90,6 +90,9 @@ static inline struct workspace *list_to_workspace(struct list_head *list)
return container_of(list, struct workspace, list);
}
static void zstd_free_workspace(struct list_head *ws);
static struct list_head *zstd_alloc_workspace(unsigned int level);
/*
* zstd_reclaim_timer_fn - reclaim timer
* @t: timer
@ -124,7 +127,7 @@ static void zstd_reclaim_timer_fn(struct timer_list *timer)
level = victim->level;
list_del(&victim->lru_list);
list_del(&victim->list);
wsm.ops->free_workspace(&victim->list);
zstd_free_workspace(&victim->list);
if (list_empty(&wsm.idle_ws[level - 1]))
clear_bit(level - 1, &wsm.active_map);
@ -180,7 +183,7 @@ static void zstd_init_workspace_manager(void)
for (i = 0; i < ZSTD_BTRFS_MAX_LEVEL; i++)
INIT_LIST_HEAD(&wsm.idle_ws[i]);
ws = wsm.ops->alloc_workspace(ZSTD_BTRFS_MAX_LEVEL);
ws = zstd_alloc_workspace(ZSTD_BTRFS_MAX_LEVEL);
if (IS_ERR(ws)) {
pr_warn(
"BTRFS: cannot preallocate zstd compression workspace\n");
@ -202,7 +205,7 @@ static void zstd_cleanup_workspace_manager(void)
struct workspace, list);
list_del(&workspace->list);
list_del(&workspace->lru_list);
wsm.ops->free_workspace(&workspace->list);
zstd_free_workspace(&workspace->list);
}
}
spin_unlock(&wsm.lock);
@ -272,7 +275,7 @@ again:
return ws;
nofs_flag = memalloc_nofs_save();
ws = wsm.ops->alloc_workspace(level);
ws = zstd_alloc_workspace(level);
memalloc_nofs_restore(nofs_flag);
if (IS_ERR(ws)) {

243
include/trace/events/btrfs.h
View file

@ -27,6 +27,7 @@ struct btrfs_work;
struct __btrfs_workqueue;
struct btrfs_qgroup_extent_record;
struct btrfs_qgroup;
struct extent_io_tree;
struct prelim_ref;
TRACE_DEFINE_ENUM(FLUSH_DELAYED_ITEMS_NR);
@ -77,6 +78,17 @@ TRACE_DEFINE_ENUM(COMMIT_TRANS);
{ BTRFS_QGROUP_RSV_META_PERTRANS, "META_PERTRANS" }, \
{ BTRFS_QGROUP_RSV_META_PREALLOC, "META_PREALLOC" })
#define show_extent_io_tree_owner(owner) \
__print_symbolic(owner, \
{ IO_TREE_FS_INFO_FREED_EXTENTS0, "FREED_EXTENTS0" }, \
{ IO_TREE_FS_INFO_FREED_EXTENTS1, "FREED_EXTENTS1" }, \
{ IO_TREE_INODE_IO, "INODE_IO" }, \
{ IO_TREE_INODE_IO_FAILURE, "INODE_IO_FAILURE" }, \
{ IO_TREE_RELOC_BLOCKS, "RELOC_BLOCKS" }, \
{ IO_TREE_TRANS_DIRTY_PAGES, "TRANS_DIRTY_PAGES" }, \
{ IO_TREE_ROOT_DIRTY_LOG_PAGES, "ROOT_DIRTY_LOG_PAGES" }, \
{ IO_TREE_SELFTEST, "SELFTEST" })
#define BTRFS_GROUP_FLAGS \
{ BTRFS_BLOCK_GROUP_DATA, "DATA"}, \
{ BTRFS_BLOCK_GROUP_SYSTEM, "SYSTEM"}, \
@ -88,11 +100,34 @@ TRACE_DEFINE_ENUM(COMMIT_TRANS);
{ BTRFS_BLOCK_GROUP_RAID5, "RAID5"}, \
{ BTRFS_BLOCK_GROUP_RAID6, "RAID6"}
#define EXTENT_FLAGS \
{ EXTENT_DIRTY, "DIRTY"}, \
{ EXTENT_UPTODATE, "UPTODATE"}, \
{ EXTENT_LOCKED, "LOCKED"}, \
{ EXTENT_NEW, "NEW"}, \
{ EXTENT_DELALLOC, "DELALLOC"}, \
{ EXTENT_DEFRAG, "DEFRAG"}, \
{ EXTENT_BOUNDARY, "BOUNDARY"}, \
{ EXTENT_NODATASUM, "NODATASUM"}, \
{ EXTENT_CLEAR_META_RESV, "CLEAR_META_RESV"}, \
{ EXTENT_NEED_WAIT, "NEED_WAIT"}, \
{ EXTENT_DAMAGED, "DAMAGED"}, \
{ EXTENT_NORESERVE, "NORESERVE"}, \
{ EXTENT_QGROUP_RESERVED, "QGROUP_RESERVED"}, \
{ EXTENT_CLEAR_DATA_RESV, "CLEAR_DATA_RESV"}, \
{ EXTENT_DELALLOC_NEW, "DELALLOC_NEW"}
#define BTRFS_FSID_SIZE 16
#define TP_STRUCT__entry_fsid __array(u8, fsid, BTRFS_FSID_SIZE)
#define TP_fast_assign_fsid(fs_info) \
memcpy(__entry->fsid, fs_info->fs_devices->fsid, BTRFS_FSID_SIZE)
({ \
if (fs_info) \
memcpy(__entry->fsid, fs_info->fs_devices->fsid, \
BTRFS_FSID_SIZE); \
else \
memset(__entry->fsid, 0, BTRFS_FSID_SIZE); \
})
#define TP_STRUCT__entry_btrfs(args...) \
TP_STRUCT__entry( \
@ -1850,6 +1885,212 @@ DEFINE_EVENT(btrfs__block_group, btrfs_skip_unused_block_group,
TP_ARGS(bg_cache)
);
TRACE_EVENT(btrfs_set_extent_bit,
TP_PROTO(const struct extent_io_tree *tree,
u64 start, u64 len, unsigned set_bits),
TP_ARGS(tree, start, len, set_bits),
TP_STRUCT__entry_btrfs(
__field( unsigned, owner )
__field( u64, ino )
__field( u64, rootid )
__field( u64, start )
__field( u64, len )
__field( unsigned, set_bits)
),
TP_fast_assign_btrfs(tree->fs_info,
__entry->owner = tree->owner;
if (tree->private_data) {
struct inode *inode = tree->private_data;
__entry->ino = btrfs_ino(BTRFS_I(inode));
__entry->rootid =
BTRFS_I(inode)->root->root_key.objectid;
} else {
__entry->ino = 0;
__entry->rootid = 0;
}
__entry->start = start;
__entry->len = len;
__entry->set_bits = set_bits;
),
TP_printk_btrfs(
"io_tree=%s ino=%llu root=%llu start=%llu len=%llu set_bits=%s",
show_extent_io_tree_owner(__entry->owner), __entry->ino,
__entry->rootid, __entry->start, __entry->len,
__print_flags(__entry->set_bits, "|", EXTENT_FLAGS))
);
TRACE_EVENT(btrfs_clear_extent_bit,
TP_PROTO(const struct extent_io_tree *tree,
u64 start, u64 len, unsigned clear_bits),
TP_ARGS(tree, start, len, clear_bits),
TP_STRUCT__entry_btrfs(
__field( unsigned, owner )
__field( u64, ino )
__field( u64, rootid )
__field( u64, start )
__field( u64, len )
__field( unsigned, clear_bits)
),
TP_fast_assign_btrfs(tree->fs_info,
__entry->owner = tree->owner;
if (tree->private_data) {
struct inode *inode = tree->private_data;
__entry->ino = btrfs_ino(BTRFS_I(inode));
__entry->rootid =
BTRFS_I(inode)->root->root_key.objectid;
} else {
__entry->ino = 0;
__entry->rootid = 0;
}
__entry->start = start;
__entry->len = len;
__entry->clear_bits = clear_bits;
),
TP_printk_btrfs(
"io_tree=%s ino=%llu root=%llu start=%llu len=%llu clear_bits=%s",
show_extent_io_tree_owner(__entry->owner), __entry->ino,
__entry->rootid, __entry->start, __entry->len,
__print_flags(__entry->clear_bits, "|", EXTENT_FLAGS))
);
TRACE_EVENT(btrfs_convert_extent_bit,
TP_PROTO(const struct extent_io_tree *tree,
u64 start, u64 len, unsigned set_bits, unsigned clear_bits),
TP_ARGS(tree, start, len, set_bits, clear_bits),
TP_STRUCT__entry_btrfs(
__field( unsigned, owner )
__field( u64, ino )
__field( u64, rootid )
__field( u64, start )
__field( u64, len )
__field( unsigned, set_bits)
__field( unsigned, clear_bits)
),
TP_fast_assign_btrfs(tree->fs_info,
__entry->owner = tree->owner;
if (tree->private_data) {
struct inode *inode = tree->private_data;
__entry->ino = btrfs_ino(BTRFS_I(inode));
__entry->rootid =
BTRFS_I(inode)->root->root_key.objectid;
} else {
__entry->ino = 0;
__entry->rootid = 0;
}
__entry->start = start;
__entry->len = len;
__entry->set_bits = set_bits;
__entry->clear_bits = clear_bits;
),
TP_printk_btrfs(
"io_tree=%s ino=%llu root=%llu start=%llu len=%llu set_bits=%s clear_bits=%s",
show_extent_io_tree_owner(__entry->owner), __entry->ino,
__entry->rootid, __entry->start, __entry->len,
__print_flags(__entry->set_bits , "|", EXTENT_FLAGS),
__print_flags(__entry->clear_bits, "|", EXTENT_FLAGS))
);
DECLARE_EVENT_CLASS(btrfs_sleep_tree_lock,
TP_PROTO(const struct extent_buffer *eb, u64 start_ns),
TP_ARGS(eb, start_ns),
TP_STRUCT__entry_btrfs(
__field( u64, block )
__field( u64, generation )
__field( u64, start_ns )
__field( u64, end_ns )
__field( u64, diff_ns )
__field( u64, owner )
__field( int, is_log_tree )
),
TP_fast_assign_btrfs(eb->fs_info,
__entry->block = eb->start;
__entry->generation = btrfs_header_generation(eb);
__entry->start_ns = start_ns;
__entry->end_ns = ktime_get_ns();
__entry->diff_ns = __entry->end_ns - start_ns;
__entry->owner = btrfs_header_owner(eb);
__entry->is_log_tree = (eb->log_index >= 0);
),
TP_printk_btrfs(
"block=%llu generation=%llu start_ns=%llu end_ns=%llu diff_ns=%llu owner=%llu is_log_tree=%d",
__entry->block, __entry->generation,
__entry->start_ns, __entry->end_ns, __entry->diff_ns,
__entry->owner, __entry->is_log_tree)
);
DEFINE_EVENT(btrfs_sleep_tree_lock, btrfs_tree_read_lock,
TP_PROTO(const struct extent_buffer *eb, u64 start_ns),
TP_ARGS(eb, start_ns)
);
DEFINE_EVENT(btrfs_sleep_tree_lock, btrfs_tree_lock,
TP_PROTO(const struct extent_buffer *eb, u64 start_ns),
TP_ARGS(eb, start_ns)
);
DECLARE_EVENT_CLASS(btrfs_locking_events,
TP_PROTO(const struct extent_buffer *eb),
TP_ARGS(eb),
TP_STRUCT__entry_btrfs(
__field( u64, block )
__field( u64, generation )
__field( u64, owner )
__field( int, is_log_tree )
),
TP_fast_assign_btrfs(eb->fs_info,
__entry->block = eb->start;
__entry->generation = btrfs_header_generation(eb);
__entry->owner = btrfs_header_owner(eb);
__entry->is_log_tree = (eb->log_index >= 0);
),
TP_printk_btrfs("block=%llu generation=%llu owner=%llu is_log_tree=%d",
__entry->block, __entry->generation,
__entry->owner, __entry->is_log_tree)
);
#define DEFINE_BTRFS_LOCK_EVENT(name) \
DEFINE_EVENT(btrfs_locking_events, name, \
TP_PROTO(const struct extent_buffer *eb), \
\
TP_ARGS(eb) \
)
DEFINE_BTRFS_LOCK_EVENT(btrfs_tree_unlock);
DEFINE_BTRFS_LOCK_EVENT(btrfs_tree_read_unlock);
DEFINE_BTRFS_LOCK_EVENT(btrfs_tree_read_unlock_blocking);
DEFINE_BTRFS_LOCK_EVENT(btrfs_set_lock_blocking_read);
DEFINE_BTRFS_LOCK_EVENT(btrfs_set_lock_blocking_write);
DEFINE_BTRFS_LOCK_EVENT(btrfs_clear_lock_blocking_read);
DEFINE_BTRFS_LOCK_EVENT(btrfs_clear_lock_blocking_write);
DEFINE_BTRFS_LOCK_EVENT(btrfs_try_tree_read_lock);
DEFINE_BTRFS_LOCK_EVENT(btrfs_try_tree_write_lock);
DEFINE_BTRFS_LOCK_EVENT(btrfs_tree_read_lock_atomic);
#endif /* _TRACE_BTRFS_H */
/* This part must be outside protection */

2
include/uapi/linux/btrfs_tree.h
View file

@ -307,6 +307,8 @@
*
* Used by:
* struct btrfs_dir_item.type
*
* Values 0..7 must match common file type values in fs_types.h.
*/
#define BTRFS_FT_UNKNOWN 0
#define BTRFS_FT_REG_FILE 1