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Merge branch 'for-chris' of 

git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs-work into for-linus

Conflicts:
	fs/btrfs/disk-io.c
	fs/btrfs/extent-tree.c
	fs/btrfs/free-space-cache.c
	fs/btrfs/inode.c
	fs/btrfs/transaction.c

Signed-off-by: Chris Mason <chris.mason@oracle.com>
wifi-calibration
Chris Mason 2011-05-28 07:00:39 -04:00
parent 174ba50915 d90c732122
commit ff5714cca9
15 changed files with 474 additions and 385 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
fs/btrfs/btrfs_inode.h
View File

@ -121,9 +121,6 @@ struct btrfs_inode {
*/
u64 index_cnt;
/* the start of block group preferred for allocations. */
u64 block_group;
/* the fsync log has some corner cases that mean we have to check
* directories to see if any unlinks have been done before
* the directory was logged. See tree-log.c for all the

28
fs/btrfs/ctree.c
View File

@ -43,8 +43,6 @@ struct btrfs_path *btrfs_alloc_path(void)
{
struct btrfs_path *path;
path = kmem_cache_zalloc(btrfs_path_cachep, GFP_NOFS);
if (path)
path->reada = 1;
return path;
}
@ -1224,6 +1222,7 @@ static void reada_for_search(struct btrfs_root *root,
u64 search;
u64 target;
u64 nread = 0;
u64 gen;
int direction = path->reada;
struct extent_buffer *eb;
u32 nr;
@ -1251,6 +1250,15 @@ static void reada_for_search(struct btrfs_root *root,
nritems = btrfs_header_nritems(node);
nr = slot;
while (1) {
if (!node->map_token) {
unsigned long offset = btrfs_node_key_ptr_offset(nr);
map_private_extent_buffer(node, offset,
sizeof(struct btrfs_key_ptr),
&node->map_token,
&node->kaddr,
&node->map_start,
&node->map_len, KM_USER1);
}
if (direction < 0) {
if (nr == 0)
break;
@ -1268,14 +1276,23 @@ static void reada_for_search(struct btrfs_root *root,
search = btrfs_node_blockptr(node, nr);
if ((search <= target && target - search <= 65536) ||
(search > target && search - target <= 65536)) {
readahead_tree_block(root, search, blocksize,
btrfs_node_ptr_generation(node, nr));
gen = btrfs_node_ptr_generation(node, nr);
if (node->map_token) {
unmap_extent_buffer(node, node->map_token,
KM_USER1);
node->map_token = NULL;
}
readahead_tree_block(root, search, blocksize, gen);
nread += blocksize;
}
nscan++;
if ((nread > 65536 || nscan > 32))
break;
}
if (node->map_token) {
unmap_extent_buffer(node, node->map_token, KM_USER1);
node->map_token = NULL;
}
}
/*
@ -1648,9 +1665,6 @@ again:
}
cow_done:
BUG_ON(!cow && ins_len);
if (level != btrfs_header_level(b))
WARN_ON(1);
level = btrfs_header_level(b);
p->nodes[level] = b;
if (!p->skip_locking)

12
fs/btrfs/ctree.h
View File

@ -930,7 +930,6 @@ struct btrfs_fs_info {
* is required instead of the faster short fsync log commits
*/
u64 last_trans_log_full_commit;
u64 open_ioctl_trans;
unsigned long mount_opt:20;
unsigned long compress_type:4;
u64 max_inline;
@ -947,7 +946,6 @@ struct btrfs_fs_info {
struct super_block *sb;
struct inode *btree_inode;
struct backing_dev_info bdi;
struct mutex trans_mutex;
struct mutex tree_log_mutex;
struct mutex transaction_kthread_mutex;
struct mutex cleaner_mutex;
@ -968,6 +966,7 @@ struct btrfs_fs_info {
struct rw_semaphore subvol_sem;
struct srcu_struct subvol_srcu;
spinlock_t trans_lock;
struct list_head trans_list;
struct list_head hashers;
struct list_head dead_roots;
@ -980,6 +979,7 @@ struct btrfs_fs_info {
atomic_t async_submit_draining;
atomic_t nr_async_bios;
atomic_t async_delalloc_pages;
atomic_t open_ioctl_trans;
/*
* this is used by the balancing code to wait for all the pending
@ -1044,6 +1044,7 @@ struct btrfs_fs_info {
int closing;
int log_root_recovering;
int enospc_unlink;
int trans_no_join;
u64 total_pinned;
@ -1065,7 +1066,6 @@ struct btrfs_fs_info {
struct reloc_control *reloc_ctl;
spinlock_t delalloc_lock;
spinlock_t new_trans_lock;
u64 delalloc_bytes;
/* data_alloc_cluster is only used in ssd mode */
@ -2238,6 +2238,9 @@ int btrfs_block_rsv_migrate(struct btrfs_block_rsv *src_rsv,
void btrfs_block_rsv_release(struct btrfs_root *root,
struct btrfs_block_rsv *block_rsv,
u64 num_bytes);
int btrfs_truncate_reserve_metadata(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_block_rsv *rsv);
int btrfs_set_block_group_ro(struct btrfs_root *root,
struct btrfs_block_group_cache *cache);
int btrfs_set_block_group_rw(struct btrfs_root *root,
@ -2512,8 +2515,7 @@ int btrfs_set_extent_delalloc(struct inode *inode, u64 start, u64 end,
int btrfs_writepages(struct address_space *mapping,
struct writeback_control *wbc);
int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
struct btrfs_root *new_root,
u64 new_dirid, u64 alloc_hint);
struct btrfs_root *new_root, u64 new_dirid);
int btrfs_merge_bio_hook(struct page *page, unsigned long offset,
size_t size, struct bio *bio, unsigned long bio_flags);

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

@ -1129,7 +1129,7 @@ static void btrfs_async_run_delayed_node_done(struct btrfs_work *work)
delayed_node = async_node->delayed_node;
root = delayed_node->root;
trans = btrfs_join_transaction(root, 0);
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
goto free_path;
@ -1572,8 +1572,7 @@ static void fill_stack_inode_item(struct btrfs_trans_handle *trans,
btrfs_set_stack_inode_transid(inode_item, trans->transid);
btrfs_set_stack_inode_rdev(inode_item, inode->i_rdev);
btrfs_set_stack_inode_flags(inode_item, BTRFS_I(inode)->flags);
btrfs_set_stack_inode_block_group(inode_item,
BTRFS_I(inode)->block_group);
btrfs_set_stack_inode_block_group(inode_item, 0);
btrfs_set_stack_timespec_sec(btrfs_inode_atime(inode_item),
inode->i_atime.tv_sec);

36
fs/btrfs/disk-io.c
View File

@ -1505,24 +1505,24 @@ static int transaction_kthread(void *arg)
vfs_check_frozen(root->fs_info->sb, SB_FREEZE_WRITE);
mutex_lock(&root->fs_info->transaction_kthread_mutex);
spin_lock(&root->fs_info->new_trans_lock);
spin_lock(&root->fs_info->trans_lock);
cur = root->fs_info->running_transaction;
if (!cur) {
spin_unlock(&root->fs_info->new_trans_lock);
spin_unlock(&root->fs_info->trans_lock);
goto sleep;
}
now = get_seconds();
if (!cur->blocked &&
(now < cur->start_time || now - cur->start_time < 30)) {
spin_unlock(&root->fs_info->new_trans_lock);
spin_unlock(&root->fs_info->trans_lock);
delay = HZ * 5;
goto sleep;
}
transid = cur->transid;
spin_unlock(&root->fs_info->new_trans_lock);
spin_unlock(&root->fs_info->trans_lock);
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
BUG_ON(IS_ERR(trans));
if (transid == trans->transid) {
ret = btrfs_commit_transaction(trans, root);
@ -1613,7 +1613,7 @@ struct btrfs_root *open_ctree(struct super_block *sb,
INIT_LIST_HEAD(&fs_info->ordered_operations);
INIT_LIST_HEAD(&fs_info->caching_block_groups);
spin_lock_init(&fs_info->delalloc_lock);
spin_lock_init(&fs_info->new_trans_lock);
spin_lock_init(&fs_info->trans_lock);
spin_lock_init(&fs_info->ref_cache_lock);
spin_lock_init(&fs_info->fs_roots_radix_lock);
spin_lock_init(&fs_info->delayed_iput_lock);
@ -1645,6 +1645,7 @@ struct btrfs_root *open_ctree(struct super_block *sb,
fs_info->max_inline = 8192 * 1024;
fs_info->metadata_ratio = 0;
fs_info->defrag_inodes = RB_ROOT;
fs_info->trans_no_join = 0;
fs_info->thread_pool_size = min_t(unsigned long,
num_online_cpus() + 2, 8);
@ -1709,7 +1710,6 @@ struct btrfs_root *open_ctree(struct super_block *sb,
fs_info->do_barriers = 1;
mutex_init(&fs_info->trans_mutex);
mutex_init(&fs_info->ordered_operations_mutex);
mutex_init(&fs_info->tree_log_mutex);
mutex_init(&fs_info->chunk_mutex);
@ -2479,13 +2479,13 @@ int btrfs_commit_super(struct btrfs_root *root)
down_write(&root->fs_info->cleanup_work_sem);
up_write(&root->fs_info->cleanup_work_sem);
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
return PTR_ERR(trans);
ret = btrfs_commit_transaction(trans, root);
BUG_ON(ret);
/* run commit again to drop the original snapshot */
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
return PTR_ERR(trans);
btrfs_commit_transaction(trans, root);
@ -3024,10 +3024,13 @@ static int btrfs_cleanup_transaction(struct btrfs_root *root)
WARN_ON(1);
mutex_lock(&root->fs_info->trans_mutex);
mutex_lock(&root->fs_info->transaction_kthread_mutex);
spin_lock(&root->fs_info->trans_lock);
list_splice_init(&root->fs_info->trans_list, &list);
root->fs_info->trans_no_join = 1;
spin_unlock(&root->fs_info->trans_lock);
while (!list_empty(&list)) {
t = list_entry(list.next, struct btrfs_transaction, list);
if (!t)
@ -3052,23 +3055,18 @@ static int btrfs_cleanup_transaction(struct btrfs_root *root)
t->blocked = 0;
if (waitqueue_active(&root->fs_info->transaction_wait))
wake_up(&root->fs_info->transaction_wait);
mutex_unlock(&root->fs_info->trans_mutex);
mutex_lock(&root->fs_info->trans_mutex);
t->commit_done = 1;
if (waitqueue_active(&t->commit_wait))
wake_up(&t->commit_wait);
mutex_unlock(&root->fs_info->trans_mutex);
mutex_lock(&root->fs_info->trans_mutex);
btrfs_destroy_pending_snapshots(t);
btrfs_destroy_delalloc_inodes(root);
spin_lock(&root->fs_info->new_trans_lock);
spin_lock(&root->fs_info->trans_lock);
root->fs_info->running_transaction = NULL;
spin_unlock(&root->fs_info->new_trans_lock);
spin_unlock(&root->fs_info->trans_lock);
btrfs_destroy_marked_extents(root, &t->dirty_pages,
EXTENT_DIRTY);
@ -3082,8 +3080,10 @@ static int btrfs_cleanup_transaction(struct btrfs_root *root)
kmem_cache_free(btrfs_transaction_cachep, t);
}
spin_lock(&root->fs_info->trans_lock);
root->fs_info->trans_no_join = 0;
spin_unlock(&root->fs_info->trans_lock);
mutex_unlock(&root->fs_info->transaction_kthread_mutex);
mutex_unlock(&root->fs_info->trans_mutex);
return 0;
}

100
fs/btrfs/extent-tree.c
View File

@ -348,7 +348,7 @@ static int caching_kthread(void *data)
*/
path->skip_locking = 1;
path->search_commit_root = 1;
path->reada = 2;
path->reada = 1;
key.objectid = last;
key.offset = 0;
@ -379,15 +379,18 @@ again:
if (ret)
break;
caching_ctl->progress = last;
btrfs_release_path(path);
up_read(&fs_info->extent_commit_sem);
mutex_unlock(&caching_ctl->mutex);
if (btrfs_transaction_in_commit(fs_info))
schedule_timeout(1);
else
if (need_resched() ||
btrfs_next_leaf(extent_root, path)) {
caching_ctl->progress = last;
btrfs_release_path(path);
up_read(&fs_info->extent_commit_sem);
mutex_unlock(&caching_ctl->mutex);
cond_resched();
goto again;
goto again;
}
leaf = path->nodes[0];
nritems = btrfs_header_nritems(leaf);
continue;
}
if (key.objectid < block_group->key.objectid) {
@ -3065,7 +3068,7 @@ again:
spin_unlock(&data_sinfo->lock);
alloc:
alloc_target = btrfs_get_alloc_profile(root, 1);
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
return PTR_ERR(trans);
@ -3091,9 +3094,10 @@ alloc:
/* commit the current transaction and try again */
commit_trans:
if (!committed && !root->fs_info->open_ioctl_trans) {
if (!committed &&
!atomic_read(&root->fs_info->open_ioctl_trans)) {
committed = 1;
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
return PTR_ERR(trans);
ret = btrfs_commit_transaction(trans, root);
@ -3472,7 +3476,7 @@ again:
goto out;
ret = -ENOSPC;
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
goto out;
ret = btrfs_commit_transaction(trans, root);
@ -3699,7 +3703,7 @@ int btrfs_block_rsv_check(struct btrfs_trans_handle *trans,
if (trans)
return -EAGAIN;
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
BUG_ON(IS_ERR(trans));
ret = btrfs_commit_transaction(trans, root);
return 0;
@ -3837,6 +3841,37 @@ static void release_global_block_rsv(struct btrfs_fs_info *fs_info)
WARN_ON(fs_info->chunk_block_rsv.reserved > 0);
}
int btrfs_truncate_reserve_metadata(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct btrfs_block_rsv *rsv)
{
struct btrfs_block_rsv *trans_rsv = &root->fs_info->trans_block_rsv;
u64 num_bytes;
int ret;
/*
* Truncate should be freeing data, but give us 2 items just in case it
* needs to use some space. We may want to be smarter about this in the
* future.
*/
num_bytes = btrfs_calc_trans_metadata_size(root, 2);
/* We already have enough bytes, just return */
if (rsv->reserved >= num_bytes)
return 0;
num_bytes -= rsv->reserved;
/*
* You should have reserved enough space before hand to do this, so this
* should not fail.
*/
ret = block_rsv_migrate_bytes(trans_rsv, rsv, num_bytes);
BUG_ON(ret);
return 0;
}
int btrfs_trans_reserve_metadata(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
int num_items)
@ -3877,23 +3912,18 @@ int btrfs_orphan_reserve_metadata(struct btrfs_trans_handle *trans,
struct btrfs_block_rsv *dst_rsv = root->orphan_block_rsv;
/*
* one for deleting orphan item, one for updating inode and
* two for calling btrfs_truncate_inode_items.
*
* btrfs_truncate_inode_items is a delete operation, it frees
* more space than it uses in most cases. So two units of
* metadata space should be enough for calling it many times.
* If all of the metadata space is used, we can commit
* transaction and use space it freed.
* We need to hold space in order to delete our orphan item once we've
* added it, so this takes the reservation so we can release it later
* when we are truly done with the orphan item.
*/
u64 num_bytes = btrfs_calc_trans_metadata_size(root, 4);
u64 num_bytes = btrfs_calc_trans_metadata_size(root, 1);
return block_rsv_migrate_bytes(src_rsv, dst_rsv, num_bytes);
}
void btrfs_orphan_release_metadata(struct inode *inode)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
u64 num_bytes = btrfs_calc_trans_metadata_size(root, 4);
u64 num_bytes = btrfs_calc_trans_metadata_size(root, 1);
btrfs_block_rsv_release(root, root->orphan_block_rsv, num_bytes);
}
@ -4987,6 +5017,15 @@ have_block_group:
if (unlikely(block_group->ro))
goto loop;
spin_lock(&block_group->free_space_ctl->tree_lock);
if (cached &&
block_group->free_space_ctl->free_space <
num_bytes + empty_size) {
spin_unlock(&block_group->free_space_ctl->tree_lock);
goto loop;
}
spin_unlock(&block_group->free_space_ctl->tree_lock);
/*
* Ok we want to try and use the cluster allocator, so lets look
* there, unless we are on LOOP_NO_EMPTY_SIZE, since we will
@ -5150,6 +5189,7 @@ checks:
btrfs_add_free_space(block_group, offset,
search_start - offset);
BUG_ON(offset > search_start);
btrfs_put_block_group(block_group);
break;
loop:
failed_cluster_refill = false;
@ -5242,14 +5282,7 @@ loop:
ret = -ENOSPC;
} else if (!ins->objectid) {
ret = -ENOSPC;
}
/* we found what we needed */
if (ins->objectid) {
if (!(data & BTRFS_BLOCK_GROUP_DATA))
trans->block_group = block_group->key.objectid;
btrfs_put_block_group(block_group);
} else if (ins->objectid) {
ret = 0;
}
@ -6526,7 +6559,7 @@ int btrfs_set_block_group_ro(struct btrfs_root *root,
BUG_ON(cache->ro);
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
BUG_ON(IS_ERR(trans));
alloc_flags = update_block_group_flags(root, cache->flags);
@ -6882,6 +6915,7 @@ int btrfs_read_block_groups(struct btrfs_root *root)
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
path->reada = 1;
cache_gen = btrfs_super_cache_generation(&root->fs_info->super_copy);
if (cache_gen != 0 &&

2
fs/btrfs/extent_io.c
View File

@ -1474,7 +1474,7 @@ u64 count_range_bits(struct extent_io_tree *tree,
if (total_bytes >= max_bytes)
break;
if (!found) {
*start = state->start;
*start = max(cur_start, state->start);
found = 1;
}
last = state->end;

4
fs/btrfs/file.c
View File

@ -1480,14 +1480,12 @@ int btrfs_sync_file(struct file *file, int datasync)
* the current transaction, we can bail out now without any
* syncing
*/
mutex_lock(&root->fs_info->trans_mutex);
smp_mb();
if (BTRFS_I(inode)->last_trans <=
root->fs_info->last_trans_committed) {
BTRFS_I(inode)->last_trans = 0;
mutex_unlock(&root->fs_info->trans_mutex);
goto out;
}
mutex_unlock(&root->fs_info->trans_mutex);
/*
* ok we haven't committed the transaction yet, lets do a commit

27
fs/btrfs/free-space-cache.c
View File

@ -402,7 +402,14 @@ int __load_free_space_cache(struct btrfs_root *root, struct inode *inode,
spin_lock(&ctl->tree_lock);
ret = link_free_space(ctl, e);
spin_unlock(&ctl->tree_lock);
BUG_ON(ret);
if (ret) {
printk(KERN_ERR "Duplicate entries in "
"free space cache, dumping\n");
kunmap(page);
unlock_page(page);
page_cache_release(page);
goto free_cache;
}
} else {
e->bitmap = kzalloc(PAGE_CACHE_SIZE, GFP_NOFS);
if (!e->bitmap) {
@ -419,6 +426,14 @@ int __load_free_space_cache(struct btrfs_root *root, struct inode *inode,
ctl->op->recalc_thresholds(ctl);
spin_unlock(&ctl->tree_lock);
list_add_tail(&e->list, &bitmaps);
if (ret) {
printk(KERN_ERR "Duplicate entries in "
"free space cache, dumping\n");
kunmap(page);
unlock_page(page);
page_cache_release(page);
goto free_cache;
}
}
num_entries--;
@ -963,10 +978,16 @@ static int tree_insert_offset(struct rb_root *root, u64 offset,
* logically.
*/
if (bitmap) {
WARN_ON(info->bitmap);
if (info->bitmap) {
WARN_ON_ONCE(1);
return -EEXIST;
}
p = &(*p)->rb_right;
} else {
WARN_ON(!info->bitmap);
if (!info->bitmap) {
WARN_ON_ONCE(1);
return -EEXIST;
}
p = &(*p)->rb_left;
}
}

258
fs/btrfs/inode.c
View File

@ -138,7 +138,6 @@ static noinline int insert_inline_extent(struct btrfs_trans_handle *trans,
return -ENOMEM;
path->leave_spinning = 1;
btrfs_set_trans_block_group(trans, inode);
key.objectid = btrfs_ino(inode);
key.offset = start;
@ -426,9 +425,8 @@ again:
}
}
if (start == 0) {
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
BUG_ON(IS_ERR(trans));
btrfs_set_trans_block_group(trans, inode);
trans->block_rsv = &root->fs_info->delalloc_block_rsv;
/* lets try to make an inline extent */
@ -623,8 +621,9 @@ retry:
async_extent->start + async_extent->ram_size - 1,
GFP_NOFS);
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
BUG_ON(IS_ERR(trans));
trans->block_rsv = &root->fs_info->delalloc_block_rsv;
ret = btrfs_reserve_extent(trans, root,
async_extent->compressed_size,
async_extent->compressed_size,
@ -793,9 +792,8 @@ static noinline int cow_file_range(struct inode *inode,
int ret = 0;
BUG_ON(is_free_space_inode(root, inode));
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
BUG_ON(IS_ERR(trans));
btrfs_set_trans_block_group(trans, inode);
trans->block_rsv = &root->fs_info->delalloc_block_rsv;
num_bytes = (end - start + blocksize) & ~(blocksize - 1);
@ -1077,10 +1075,12 @@ static noinline int run_delalloc_nocow(struct inode *inode,
nolock = is_free_space_inode(root, inode);
if (nolock)
trans = btrfs_join_transaction_nolock(root, 1);
trans = btrfs_join_transaction_nolock(root);
else
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
BUG_ON(IS_ERR(trans));
trans->block_rsv = &root->fs_info->delalloc_block_rsv;
cow_start = (u64)-1;
cur_offset = start;
@ -1519,8 +1519,6 @@ static noinline int add_pending_csums(struct btrfs_trans_handle *trans,
{
struct btrfs_ordered_sum *sum;
btrfs_set_trans_block_group(trans, inode);
list_for_each_entry(sum, list, list) {
btrfs_csum_file_blocks(trans,
BTRFS_I(inode)->root->fs_info->csum_root, sum);
@ -1735,11 +1733,10 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
ret = btrfs_ordered_update_i_size(inode, 0, ordered_extent);
if (!ret) {
if (nolock)
trans = btrfs_join_transaction_nolock(root, 1);
trans = btrfs_join_transaction_nolock(root);
else
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
BUG_ON(IS_ERR(trans));
btrfs_set_trans_block_group(trans, inode);
trans->block_rsv = &root->fs_info->delalloc_block_rsv;
ret = btrfs_update_inode(trans, root, inode);
BUG_ON(ret);
@ -1752,11 +1749,10 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
0, &cached_state, GFP_NOFS);
if (nolock)
trans = btrfs_join_transaction_nolock(root, 1);
trans = btrfs_join_transaction_nolock(root);
else
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
BUG_ON(IS_ERR(trans));
btrfs_set_trans_block_group(trans, inode);
trans->block_rsv = &root->fs_info->delalloc_block_rsv;
if (test_bit(BTRFS_ORDERED_COMPRESSED, &ordered_extent->flags))
@ -2431,7 +2427,7 @@ int btrfs_orphan_cleanup(struct btrfs_root *root)
(u64)-1);
if (root->orphan_block_rsv || root->orphan_item_inserted) {
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
if (!IS_ERR(trans))
btrfs_end_transaction(trans, root);
}
@ -2511,12 +2507,12 @@ static void btrfs_read_locked_inode(struct inode *inode)
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_key location;
int maybe_acls;
u64 alloc_group_block;
u32 rdev;
int ret;
path = btrfs_alloc_path();
BUG_ON(!path);
path->leave_spinning = 1;
memcpy(&location, &BTRFS_I(inode)->location, sizeof(location));
ret = btrfs_lookup_inode(NULL, root, path, &location, 0);
@ -2526,6 +2522,12 @@ static void btrfs_read_locked_inode(struct inode *inode)
leaf = path->nodes[0];
inode_item = btrfs_item_ptr(leaf, path->slots[0],
struct btrfs_inode_item);
if (!leaf->map_token)
map_private_extent_buffer(leaf, (unsigned long)inode_item,
sizeof(struct btrfs_inode_item),
&leaf->map_token, &leaf->kaddr,
&leaf->map_start, &leaf->map_len,
KM_USER1);
inode->i_mode = btrfs_inode_mode(leaf, inode_item);
inode->i_nlink = btrfs_inode_nlink(leaf, inode_item);
@ -2555,8 +2557,6 @@ static void btrfs_read_locked_inode(struct inode *inode)
BTRFS_I(inode)->index_cnt = (u64)-1;
BTRFS_I(inode)->flags = btrfs_inode_flags(leaf, inode_item);
alloc_group_block = btrfs_inode_block_group(leaf, inode_item);
/*
* try to precache a NULL acl entry for files that don't have
* any xattrs or acls
@ -2566,8 +2566,11 @@ static void btrfs_read_locked_inode(struct inode *inode)
if (!maybe_acls)
cache_no_acl(inode);
BTRFS_I(inode)->block_group = btrfs_find_block_group(root, 0,
alloc_group_block, 0);
if (leaf->map_token) {
unmap_extent_buffer(leaf, leaf->map_token, KM_USER1);
leaf->map_token = NULL;
}
btrfs_free_path(path);
inode_item = NULL;
@ -2647,7 +2650,7 @@ static void fill_inode_item(struct btrfs_trans_handle *trans,
btrfs_set_inode_transid(leaf, item, trans->transid);
btrfs_set_inode_rdev(leaf, item, inode->i_rdev);
btrfs_set_inode_flags(leaf, item, BTRFS_I(inode)->flags);
btrfs_set_inode_block_group(leaf, item, BTRFS_I(inode)->block_group);
btrfs_set_inode_block_group(leaf, item, 0);
if (leaf->map_token) {
unmap_extent_buffer(leaf, leaf->map_token, KM_USER1);
@ -3004,8 +3007,6 @@ static int btrfs_unlink(struct inode *dir, struct dentry *dentry)
if (IS_ERR(trans))
return PTR_ERR(trans);
btrfs_set_trans_block_group(trans, dir);
btrfs_record_unlink_dir(trans, dir, dentry->d_inode, 0);
ret = btrfs_unlink_inode(trans, root, dir, dentry->d_inode,
@ -3094,8 +3095,6 @@ static int btrfs_rmdir(struct inode *dir, struct dentry *dentry)
if (IS_ERR(trans))
return PTR_ERR(trans);
btrfs_set_trans_block_group(trans, dir);
if (unlikely(btrfs_ino(inode) == BTRFS_EMPTY_SUBVOL_DIR_OBJECTID)) {
err = btrfs_unlink_subvol(trans, root, dir,
BTRFS_I(inode)->location.objectid,
@ -3514,7 +3513,6 @@ int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size)
err = PTR_ERR(trans);
break;
}
btrfs_set_trans_block_group(trans, inode);
err = btrfs_drop_extents(trans, inode, cur_offset,
cur_offset + hole_size,
@ -3650,7 +3648,6 @@ void btrfs_evict_inode(struct inode *inode)
while (1) {
trans = btrfs_start_transaction(root, 0);
BUG_ON(IS_ERR(trans));
btrfs_set_trans_block_group(trans, inode);
trans->block_rsv = root->orphan_block_rsv;
ret = btrfs_block_rsv_check(trans, root,
@ -4133,7 +4130,8 @@ static int btrfs_real_readdir(struct file *filp, void *dirent,
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
path->reada = 2;
path->reada = 1;
if (key_type == BTRFS_DIR_INDEX_KEY) {
INIT_LIST_HEAD(&ins_list);
@ -4274,12 +4272,11 @@ int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc)
if (wbc->sync_mode == WB_SYNC_ALL) {
if (nolock)
trans = btrfs_join_transaction_nolock(root, 1);
trans = btrfs_join_transaction_nolock(root);
else
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
return PTR_ERR(trans);
btrfs_set_trans_block_group(trans, inode);
if (nolock)
ret = btrfs_end_transaction_nolock(trans, root);
else
@ -4303,9 +4300,8 @@ void btrfs_dirty_inode(struct inode *inode)
if (BTRFS_I(inode)->dummy_inode)
return;
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
BUG_ON(IS_ERR(trans));
btrfs_set_trans_block_group(trans, inode);
ret = btrfs_update_inode(trans, root, inode);
if (ret && ret == -ENOSPC) {
@ -4319,7 +4315,6 @@ void btrfs_dirty_inode(struct inode *inode)
PTR_ERR(trans));
return;
}
btrfs_set_trans_block_group(trans, inode);
ret = btrfs_update_inode(trans, root, inode);
if (ret) {
@ -4418,8 +4413,8 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
struct btrfs_root *root,
struct inode *dir,
const char *name, int name_len,
u64 ref_objectid, u64 objectid,
u64 alloc_hint, int mode, u64 *index)
u64 ref_objectid, u64 objectid, int mode,
u64 *index)
{
struct inode *inode;
struct btrfs_inode_item *inode_item;
@ -4472,8 +4467,6 @@ static struct inode *btrfs_new_inode(struct btrfs_trans_handle *trans,
owner = 0;
else
owner = 1;
BTRFS_I(inode)->block_group =
btrfs_find_block_group(root, 0, alloc_hint, owner);
key[0].objectid = objectid;
btrfs_set_key_type(&key[0], BTRFS_INODE_ITEM_KEY);
@ -4629,15 +4622,13 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry,
if (IS_ERR(trans))
return PTR_ERR(trans);
btrfs_set_trans_block_group(trans, dir);
err = btrfs_find_free_ino(root, &objectid);
if (err)
goto out_unlock;
inode = btrfs_new_inode(trans, root, dir, dentry->d_name.name,
dentry->d_name.len, btrfs_ino(dir), objectid,
BTRFS_I(dir)->block_group, mode, &index);
mode, &index);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
goto out_unlock;
@ -4649,7 +4640,6 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry,
goto out_unlock;
}
btrfs_set_trans_block_group(trans, inode);
err = btrfs_add_nondir(trans, dir, dentry, inode, 0, index);
if (err)
drop_inode = 1;
@ -4658,8 +4648,6 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry,
init_special_inode(inode, inode->i_mode, rdev);
btrfs_update_inode(trans, root, inode);
}
btrfs_update_inode_block_group(trans, inode);
btrfs_update_inode_block_group(trans, dir);
out_unlock:
nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, root);
@ -4692,15 +4680,13 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
if (IS_ERR(trans))
return PTR_ERR(trans);
btrfs_set_trans_block_group(trans, dir);
err = btrfs_find_free_ino(root, &objectid);
if (err)
goto out_unlock;
inode = btrfs_new_inode(trans, root, dir, dentry->d_name.name,
dentry->d_name.len, btrfs_ino(dir), objectid,
BTRFS_I(dir)->block_group, mode, &index);
mode, &index);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
goto out_unlock;
@ -4712,7 +4698,6 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
goto out_unlock;
}
btrfs_set_trans_block_group(trans, inode);
err = btrfs_add_nondir(trans, dir, dentry, inode, 0, index);
if (err)
drop_inode = 1;
@ -4723,8 +4708,6 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
inode->i_op = &btrfs_file_inode_operations;
BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
}
btrfs_update_inode_block_group(trans, inode);
btrfs_update_inode_block_group(trans, dir);
out_unlock:
nr = trans->blocks_used;
btrfs_end_transaction_throttle(trans, root);
@ -4771,8 +4754,6 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
btrfs_inc_nlink(inode);
inode->i_ctime = CURRENT_TIME;
btrfs_set_trans_block_group(trans, dir);
ihold(inode);
err = btrfs_add_nondir(trans, dir, dentry, inode, 1, index);
@ -4781,7 +4762,6 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
drop_inode = 1;
} else {
struct dentry *parent = dget_parent(dentry);
btrfs_update_inode_block_group(trans, dir);
err = btrfs_update_inode(trans, root, inode);
BUG_ON(err);
btrfs_log_new_name(trans, inode, NULL, parent);
@ -4818,7 +4798,6 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
trans = btrfs_start_transaction(root, 5);
if (IS_ERR(trans))
return PTR_ERR(trans);
btrfs_set_trans_block_group(trans, dir);
err = btrfs_find_free_ino(root, &objectid);
if (err)
@ -4826,8 +4805,7 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
inode = btrfs_new_inode(trans, root, dir, dentry->d_name.name,
dentry->d_name.len, btrfs_ino(dir), objectid,
BTRFS_I(dir)->block_group, S_IFDIR | mode,
&index);
S_IFDIR | mode, &index);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
goto out_fail;
@ -4841,7 +4819,6 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
inode->i_op = &btrfs_dir_inode_operations;
inode->i_fop = &btrfs_dir_file_operations;
btrfs_set_trans_block_group(trans, inode);
btrfs_i_size_write(inode, 0);
err = btrfs_update_inode(trans, root, inode);
@ -4855,8 +4832,6 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
d_instantiate(dentry, inode);
drop_on_err = 0;
btrfs_update_inode_block_group(trans, inode);
btrfs_update_inode_block_group(trans, dir);
out_fail:
nr = trans->blocks_used;
@ -4989,7 +4964,15 @@ again:
if (!path) {
path = btrfs_alloc_path();
BUG_ON(!path);
if (!path) {
err = -ENOMEM;
goto out;
}
/*
* Chances are we'll be called again, so go ahead and do
* readahead
*/
path->reada = 1;
}
ret = btrfs_lookup_file_extent(trans, root, path,
@ -5130,8 +5113,10 @@ again:
kunmap(page);
free_extent_map(em);
em = NULL;
btrfs_release_path(path);
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
return ERR_CAST(trans);
goto again;
@ -5375,7 +5360,7 @@ static struct extent_map *btrfs_new_extent_direct(struct inode *inode,
btrfs_drop_extent_cache(inode, start, start + len - 1, 0);
}
trans = btrfs_join_transaction(root, 0);
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
return ERR_CAST(trans);
@ -5611,7 +5596,7 @@ static int btrfs_get_blocks_direct(struct inode *inode, sector_t iblock,
* to make sure the current transaction stays open
* while we look for nocow cross refs
*/
trans = btrfs_join_transaction(root, 0);
trans = btrfs_join_transaction(root);
if (IS_ERR(trans))
goto must_cow;
@ -5750,7 +5735,7 @@ again:
BUG_ON(!ordered);
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
if (IS_ERR(trans)) {
err = -ENOMEM;
goto out;
@ -6500,6 +6485,7 @@ out:
static int btrfs_truncate(struct inode *inode)
{
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_block_rsv *rsv;
int ret;
int err = 0;
struct btrfs_trans_handle *trans;
@ -6513,28 +6499,80 @@ static int btrfs_truncate(struct inode *inode)
btrfs_wait_ordered_range(inode, inode->i_size & (~mask), (u64)-1);
btrfs_ordered_update_i_size(inode, inode->i_size, NULL);
trans = btrfs_start_transaction(root, 5);
if (IS_ERR(trans))
return PTR_ERR(trans);
/*
* Yes ladies and gentelment, this is indeed ugly. The fact is we have
* 3 things going on here
*
* 1) We need to reserve space for our orphan item and the space to
* delete our orphan item. Lord knows we don't want to have a dangling
* orphan item because we didn't reserve space to remove it.
*
* 2) We need to reserve space to update our inode.
*
* 3) We need to have something to cache all the space that is going to
* be free'd up by the truncate operation, but also have some slack
* space reserved in case it uses space during the truncate (thank you
* very much snapshotting).
*
* And we need these to all be seperate. The fact is we can use alot of
* space doing the truncate, and we have no earthly idea how much space
* we will use, so we need the truncate reservation to be seperate so it
* doesn't end up using space reserved for updating the inode or
* removing the orphan item. We also need to be able to stop the
* transaction and start a new one, which means we need to be able to
* update the inode several times, and we have no idea of knowing how
* many times that will be, so we can't just reserve 1 item for the
* entirety of the opration, so that has to be done seperately as well.
* Then there is the orphan item, which does indeed need to be held on
* to for the whole operation, and we need nobody to touch this reserved
* space except the orphan code.
*
* So that leaves us with
*
* 1) root->orphan_block_rsv - for the orphan deletion.
* 2) rsv - for the truncate reservation, which we will steal from the
* transaction reservation.
* 3) fs_info->trans_block_rsv - this will have 1 items worth left for
* updating the inode.
*/
rsv = btrfs_alloc_block_rsv(root);
if (!rsv)
return -ENOMEM;
btrfs_add_durable_block_rsv(root->fs_info, rsv);
btrfs_set_trans_block_group(trans, inode);
trans = btrfs_start_transaction(root, 4);
if (IS_ERR(trans)) {
err = PTR_ERR(trans);
goto out;
}
/*
* Reserve space for the truncate process. Truncate should be adding
* space, but if there are snapshots it may end up using space.
*/
ret = btrfs_truncate_reserve_metadata(trans, root, rsv);
BUG_ON(ret);
ret = btrfs_orphan_add(trans, inode);
if (ret) {
btrfs_end_transaction(trans, root);
return ret;
goto out;
}
nr = trans->blocks_used;
btrfs_end_transaction(trans, root);
btrfs_btree_balance_dirty(root, nr);
/* Now start a transaction for the truncate */
trans = btrfs_start_transaction(root, 0);
if (IS_ERR(trans))
return PTR_ERR(trans);
btrfs_set_trans_block_group(trans, inode);
trans->block_rsv = root->orphan_block_rsv;
/*
* Ok so we've already migrated our bytes over for the truncate, so here
* just reserve the one slot we need for updating the inode.
*/
trans = btrfs_start_transaction(root, 1);
if (IS_ERR(trans)) {
err = PTR_ERR(trans);
goto out;
}
trans->block_rsv = rsv;
/*
* setattr is responsible for setting the ordered_data_close flag,
@ -6558,24 +6596,17 @@ static int btrfs_truncate(struct inode *inode)
while (1) {
if (!trans) {
trans = btrfs_start_transaction(root, 0);
if (IS_ERR(trans))
return PTR_ERR(trans);
btrfs_set_trans_block_group(trans, inode);
trans->block_rsv = root->orphan_block_rsv;
}
trans = btrfs_start_transaction(root, 3);
if (IS_ERR(trans)) {
err = PTR_ERR(trans);
goto out;
}
ret = btrfs_block_rsv_check(trans, root,
root->orphan_block_rsv, 0, 5);
if (ret == -EAGAIN) {
ret = btrfs_commit_transaction(trans, root);
if (ret)
return ret;
trans = NULL;
continue;
} else if (ret) {
err = ret;
break;
ret = btrfs_truncate_reserve_metadata(trans, root,
rsv);
BUG_ON(ret);
trans->block_rsv = rsv;
}
ret = btrfs_truncate_inode_items(trans, root, inode,
@ -6586,6 +6617,7 @@ static int btrfs_truncate(struct inode *inode)
break;
}
trans->block_rsv = &root->fs_info->trans_block_rsv;
ret = btrfs_update_inode(trans, root, inode);
if (ret) {
err = ret;
@ -6599,6 +6631,7 @@ static int btrfs_truncate(struct inode *inode)
}
if (ret == 0 && inode->i_nlink > 0) {
trans->block_rsv = root->orphan_block_rsv;
ret = btrfs_orphan_del(trans, inode);
if (ret)
err = ret;
@ -6610,15 +6643,20 @@ static int btrfs_truncate(struct inode *inode)
ret = btrfs_orphan_del(NULL, inode);
}
trans->block_rsv = &root->fs_info->trans_block_rsv;
ret = btrfs_update_inode(trans, root, inode);
if (ret && !err)
err = ret;
nr = trans->blocks_used;
ret = btrfs_end_transaction_throttle(trans, root);
btrfs_btree_balance_dirty(root, nr);
out:
btrfs_free_block_rsv(root, rsv);
if (ret && !err)
err = ret;
btrfs_btree_balance_dirty(root, nr);
return err;
}
@ -6627,15 +6665,14 @@ static int btrfs_truncate(struct inode *inode)
* create a new subvolume directory/inode (helper for the ioctl).
*/
int btrfs_create_subvol_root(struct btrfs_trans_handle *trans,
struct btrfs_root *new_root,
u64 new_dirid, u64 alloc_hint)
struct btrfs_root *new_root, u64 new_dirid)
{
struct inode *inode;
int err;
u64 index = 0;
inode = btrfs_new_inode(trans, new_root, NULL, "..", 2, new_dirid,
new_dirid, alloc_hint, S_IFDIR | 0700, &index);
new_dirid, S_IFDIR | 0700, &index);
if (IS_ERR(inode))
return PTR_ERR(inode);
inode->i_op = &btrfs_dir_inode_operations;
@ -6748,21 +6785,6 @@ void btrfs_destroy_inode(struct inode *inode)
spin_unlock(&root->fs_info->ordered_extent_lock);
}
if (root == root->fs_info->tree_root) {
struct btrfs_block_group_cache *block_group;
block_group = btrfs_lookup_block_group(root->fs_info,
BTRFS_I(inode)->block_group);
if (block_group && block_group->inode == inode) {
spin_lock(&block_group->lock);
block_group->inode = NULL;
spin_unlock(&block_group->lock);
btrfs_put_block_group(block_group);
} else if (block_group) {
btrfs_put_block_group(block_group);
}
}
spin_lock(&root->orphan_lock);
if (!list_empty(&BTRFS_I(inode)->i_orphan)) {
printk(KERN_INFO "BTRFS: inode %llu still on the orphan list\n",
@ -6948,8 +6970,6 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
goto out_notrans;
}
btrfs_set_trans_block_group(trans, new_dir);
if (dest != root)
btrfs_record_root_in_trans(trans, dest);
@ -7131,16 +7151,13 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
if (IS_ERR(trans))
return PTR_ERR(trans);
btrfs_set_trans_block_group(trans, dir);
err = btrfs_find_free_ino(root, &objectid);
if (err)
goto out_unlock;
inode = btrfs_new_inode(trans, root, dir, dentry->d_name.name,
dentry->d_name.len, btrfs_ino(dir), objectid,
BTRFS_I(dir)->block_group, S_IFLNK|S_IRWXUGO,
&index);
S_IFLNK|S_IRWXUGO, &index);
if (IS_ERR(inode)) {
err = PTR_ERR(inode);
goto out_unlock;
@ -7152,7 +7169,6 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
goto out_unlock;
}
btrfs_set_trans_block_group(trans, inode);
err = btrfs_add_nondir(trans, dir, dentry, inode, 0, index);
if (err)
drop_inode = 1;
@ -7163,8 +7179,6 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
inode->i_op = &btrfs_file_inode_operations;
BTRFS_I(inode)->io_tree.ops = &btrfs_extent_io_ops;
}
btrfs_update_inode_block_group(trans, inode);
btrfs_update_inode_block_group(trans, dir);
if (drop_inode)
goto out_unlock;

19
fs/btrfs/ioctl.c
View File

@ -243,7 +243,7 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
ip->flags &= ~(BTRFS_INODE_COMPRESS | BTRFS_INODE_NOCOMPRESS);
}
trans = btrfs_join_transaction(root, 1);
trans = btrfs_join_transaction(root);
BUG_ON(IS_ERR(trans));
ret = btrfs_update_inode(trans, root, inode);
@ -414,8 +414,7 @@ static noinline int create_subvol(struct btrfs_root *root,
btrfs_record_root_in_trans(trans, new_root);
ret = btrfs_create_subvol_root(trans, new_root, new_dirid,
BTRFS_I(dir)->block_group);
ret = btrfs_create_subvol_root(trans, new_root, new_dirid);
/*
* insert the directory item
*/
@ -2489,12 +2488,10 @@ static long btrfs_ioctl_trans_start(struct file *file)
if (ret)
goto out;
mutex_lock(&root->fs_info->trans_mutex);
root->fs_info->open_ioctl_trans++;
mutex_unlock(&root->fs_info->trans_mutex);
atomic_inc(&root->fs_info->open_ioctl_trans);
ret = -ENOMEM;
trans = btrfs_start_ioctl_transaction(root, 0);
trans = btrfs_start_ioctl_transaction(root);
if (IS_ERR(trans))
goto out_drop;
@ -2502,9 +2499,7 @@ static long btrfs_ioctl_trans_start(struct file *file)
return 0;
out_drop:
mutex_lock(&root->fs_info->trans_mutex);
root->fs_info->open_ioctl_trans--;
mutex_unlock(&root->fs_info->trans_mutex);
atomic_dec(&root->fs_info->open_ioctl_trans);
mnt_drop_write(file->f_path.mnt);
out:
return ret;
@ -2738,9 +2733,7 @@ long btrfs_ioctl_trans_end(struct file *file)
btrfs_end_transaction(trans, root);
mutex_lock(&root->fs_info->trans_mutex);
root->fs_info->open_ioctl_trans--;
mutex_unlock(&root->fs_info->trans_mutex);
atomic_dec(&root->fs_info->open_ioctl_trans);
mnt_drop_write(file->f_path.mnt);
return 0;

34
fs/btrfs/relocation.c
View File

@ -677,6 +677,8 @@ struct backref_node *build_backref_tree(struct reloc_control *rc,
err = -ENOMEM;
goto out;
}
path1->reada = 1;
path2->reada = 2;
node = alloc_backref_node(cache);
if (!node) {
@ -1999,6 +2001,7 @@ static noinline_for_stack int merge_reloc_root(struct reloc_control *rc,
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
path->reada = 1;
reloc_root = root->reloc_root;
root_item = &reloc_root->root_item;
@ -2139,10 +2142,10 @@ int prepare_to_merge(struct reloc_control *rc, int err)
u64 num_bytes = 0;
int ret;
mutex_lock(&root->fs_info->trans_mutex);
spin_lock(&root->fs_info->trans_lock);
rc->merging_rsv_size += root->nodesize * (BTRFS_MAX_LEVEL - 1) * 2;
rc->merging_rsv_size += rc->nodes_relocated * 2;
mutex_unlock(&root->fs_info->trans_mutex);
spin_unlock(&root->fs_info->trans_lock);
again:
if (!err) {
num_bytes = rc->merging_rsv_size;
@ -2152,7 +2155,7 @@ again:
err = ret;
}
trans = btrfs_join_transaction(rc->extent_root, 1);
trans = btrfs_join_transaction(rc->extent_root);
if (IS_ERR(trans)) {
if (!err)
btrfs_block_rsv_release(rc->extent_root,
@ -2211,9 +2214,9 @@ int merge_reloc_roots(struct reloc_control *rc)
int ret;
again:
root = rc->extent_root;
mutex_lock(&root->fs_info->trans_mutex);
spin_lock(&root->fs_info->trans_lock);
list_splice_init(&rc->reloc_roots, &reloc_roots);
mutex_unlock(&root->fs_info->trans_mutex);
spin_unlock(&root->fs_info->trans_lock);
while (!list_empty(&reloc_roots)) {
found = 1;
@ -3236,7 +3239,7 @@ truncate:
goto out;
}
trans = btrfs_join_transaction(root, 0);
trans = btrfs_join_transaction(root);
if (IS_ERR(trans)) {
btrfs_free_path(path);
ret = PTR_ERR(trans);
@ -3300,6 +3303,7 @@ static int find_data_references(struct reloc_control *rc,
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
path->reada = 1;
root = read_fs_root(rc->extent_root->fs_info, ref_root);
if (IS_ERR(root)) {
@ -3586,17 +3590,17 @@ next:
static void set_reloc_control(struct reloc_control *rc)
{
struct btrfs_fs_info *fs_info = rc->extent_root->fs_info;
mutex_lock(&fs_info->trans_mutex);
spin_lock(&fs_info->trans_lock);
fs_info->reloc_ctl = rc;
mutex_unlock(&fs_info->trans_mutex);
spin_unlock(&fs_info->trans_lock);
}
static void unset_reloc_control(struct reloc_control *rc)
{
struct btrfs_fs_info *fs_info = rc->extent_root->fs_info;
mutex_lock(&fs_info->trans_mutex);
spin_lock(&fs_info->trans_lock);
fs_info->reloc_ctl = NULL;
mutex_unlock(&fs_info->trans_mutex);
spin_unlock(&fs_info->trans_lock);
}
static int check_extent_flags(u64 flags)
@ -3645,7 +3649,7 @@ int prepare_to_relocate(struct reloc_control *rc)
rc->create_reloc_tree = 1;
set_reloc_control(rc);
trans = btrfs_join_transaction(rc->extent_root, 1);
trans = btrfs_join_transaction(rc->extent_root);
BUG_ON(IS_ERR(trans));
btrfs_commit_transaction(trans, rc->extent_root);
return 0;
@ -3668,6 +3672,7 @@ static noinline_for_stack int relocate_block_group(struct reloc_control *rc)
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
path->reada = 1;
ret = prepare_to_relocate(rc);
if (ret) {
@ -3834,7 +3839,7 @@ restart:
btrfs_block_rsv_release(rc->extent_root, rc->block_rsv, (u64)-1);
/* get rid of pinned extents */
trans = btrfs_join_transaction(rc->extent_root, 1);
trans = btrfs_join_transaction(rc->extent_root);
if (IS_ERR(trans))
err = PTR_ERR(trans);
else
@ -4093,6 +4098,7 @@ int btrfs_recover_relocation(struct btrfs_root *root)
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
path->reada = -1;
key.objectid = BTRFS_TREE_RELOC_OBJECTID;
key.type = BTRFS_ROOT_ITEM_KEY;
@ -4159,7 +4165,7 @@ int btrfs_recover_relocation(struct btrfs_root *root)
set_reloc_control(rc);
trans = btrfs_join_transaction(rc->extent_root, 1);
trans = btrfs_join_transaction(rc->extent_root);
if (IS_ERR(trans)) {
unset_reloc_control(rc);
err = PTR_ERR(trans);
@ -4193,7 +4199,7 @@ int btrfs_recover_relocation(struct btrfs_root *root)
unset_reloc_control(rc);
trans = btrfs_join_transaction(rc->extent_root, 1);
trans = btrfs_join_transaction(rc->extent_root);
if (IS_ERR(trans))
err = PTR_ERR(trans);
else

300
fs/btrfs/transaction.c
View File

@ -35,6 +35,7 @@ static noinline void put_transaction(struct btrfs_transaction *transaction)
{
WARN_ON(atomic_read(&transaction->use_count) == 0);
if (atomic_dec_and_test(&transaction->use_count)) {
BUG_ON(!list_empty(&transaction->list));
memset(transaction, 0, sizeof(*transaction));
kmem_cache_free(btrfs_transaction_cachep, transaction);
}
@ -49,46 +50,72 @@ static noinline void switch_commit_root(struct btrfs_root *root)
/*
* either allocate a new transaction or hop into the existing one
*/
static noinline int join_transaction(struct btrfs_root *root)
static noinline int join_transaction(struct btrfs_root *root, int nofail)
{
struct btrfs_transaction *cur_trans;
spin_lock(&root->fs_info->trans_lock);
if (root->fs_info->trans_no_join) {
if (!nofail) {
spin_unlock(&root->fs_info->trans_lock);
return -EBUSY;
}
}
cur_trans = root->fs_info->running_transaction;
if (!cur_trans) {
cur_trans = kmem_cache_alloc(btrfs_transaction_cachep,
GFP_NOFS);
if (!cur_trans)
return -ENOMEM;
root->fs_info->generation++;
atomic_set(&cur_trans->num_writers, 1);
cur_trans->num_joined = 0;
cur_trans->transid = root->fs_info->generation;
init_waitqueue_head(&cur_trans->writer_wait);
init_waitqueue_head(&cur_trans->commit_wait);
cur_trans->in_commit = 0;
cur_trans->blocked = 0;
atomic_set(&cur_trans->use_count, 1);
cur_trans->commit_done = 0;
cur_trans->start_time = get_seconds();
cur_trans->delayed_refs.root = RB_ROOT;
cur_trans->delayed_refs.num_entries = 0;
cur_trans->delayed_refs.num_heads_ready = 0;
cur_trans->delayed_refs.num_heads = 0;
cur_trans->delayed_refs.flushing = 0;
cur_trans->delayed_refs.run_delayed_start = 0;
spin_lock_init(&cur_trans->delayed_refs.lock);
INIT_LIST_HEAD(&cur_trans->pending_snapshots);
list_add_tail(&cur_trans->list, &root->fs_info->trans_list);
extent_io_tree_init(&cur_trans->dirty_pages,
root->fs_info->btree_inode->i_mapping);
spin_lock(&root->fs_info->new_trans_lock);
root->fs_info->running_transaction = cur_trans;
spin_unlock(&root->fs_info->new_trans_lock);
} else {
if (cur_trans) {
atomic_inc(&cur_trans->use_count);
atomic_inc(&cur_trans->num_writers);
cur_trans->num_joined++;
spin_unlock(&root->fs_info->trans_lock);
return 0;
}
spin_unlock(&root->fs_info->trans_lock);
cur_trans = kmem_cache_alloc(btrfs_transaction_cachep, GFP_NOFS);
if (!cur_trans)
return -ENOMEM;
spin_lock(&root->fs_info->trans_lock);
if (root->fs_info->running_transaction) {
kmem_cache_free(btrfs_transaction_cachep, cur_trans);
cur_trans = root->fs_info->running_transaction;
atomic_inc(&cur_trans->use_count);
atomic_inc(&cur_trans->num_writers);
cur_trans->num_joined++;
spin_unlock(&root->fs_info->trans_lock);
return 0;
}
atomic_set(&cur_trans->num_writers, 1);
cur_trans->num_joined = 0;
init_waitqueue_head(&cur_trans->writer_wait);
init_waitqueue_head(&cur_trans->commit_wait);
cur_trans->in_commit = 0;
cur_trans->blocked = 0;
/*
* One for this trans handle, one so it will live on until we
* commit the transaction.
*/
atomic_set(&cur_trans->use_count, 2);
cur_trans->commit_done = 0;
cur_trans->start_time = get_seconds();
cur_trans->delayed_refs.root = RB_ROOT;
cur_trans->delayed_refs.num_entries = 0;
cur_trans->delayed_refs.num_heads_ready = 0;
cur_trans->delayed_refs.num_heads = 0;
cur_trans->delayed_refs.flushing = 0;
cur_trans->delayed_refs.run_delayed_start = 0;
spin_lock_init(&cur_trans->commit_lock);
spin_lock_init(&cur_trans->delayed_refs.lock);
INIT_LIST_HEAD(&cur_trans->pending_snapshots);
list_add_tail(&cur_trans->list, &root->fs_info->trans_list);
extent_io_tree_init(&cur_trans->dirty_pages,
root->fs_info->btree_inode->i_mapping);
root->fs_info->generation++;
cur_trans->transid = root->fs_info->generation;
root->fs_info->running_transaction = cur_trans;
spin_unlock(&root->fs_info->trans_lock);
return 0;
}
@ -99,39 +126,28 @@ static noinline int join_transaction(struct btrfs_root *root)
* to make sure the old root from before we joined the transaction is deleted
* when the transaction commits
*/
static noinline int record_root_in_trans(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
if (root->ref_cows && root->last_trans < trans->transid) {
WARN_ON(root == root->fs_info->extent_root);
WARN_ON(root->commit_root != root->node);
spin_lock(&root->fs_info->fs_roots_radix_lock);
if (root->last_trans == trans->transid) {
spin_unlock(&root->fs_info->fs_roots_radix_lock);
return 0;
}
root->last_trans = trans->transid;
radix_tree_tag_set(&root->fs_info->fs_roots_radix,
(unsigned long)root->root_key.objectid,
BTRFS_ROOT_TRANS_TAG);
root->last_trans = trans->transid;
spin_unlock(&root->fs_info->fs_roots_radix_lock);
btrfs_init_reloc_root(trans, root);
}
return 0;
}
int btrfs_record_root_in_trans(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
if (!root->ref_cows)
return 0;
mutex_lock(&root->fs_info->trans_mutex);
if (root->last_trans == trans->transid) {
mutex_unlock(&root->fs_info->trans_mutex);
return 0;
}
record_root_in_trans(trans, root);
mutex_unlock(&root->fs_info->trans_mutex);
return 0;
}
/* wait for commit against the current transaction to become unblocked
* when this is done, it is safe to start a new transaction, but the current
* transaction might not be fully on disk.
@ -140,21 +156,23 @@ static void wait_current_trans(struct btrfs_root *root)
{
struct btrfs_transaction *cur_trans;
spin_lock(&root->fs_info->trans_lock);
cur_trans = root->fs_info->running_transaction;
if (cur_trans && cur_trans->blocked) {
DEFINE_WAIT(wait);
atomic_inc(&cur_trans->use_count);
spin_unlock(&root->fs_info->trans_lock);
while (1) {
prepare_to_wait(&root->fs_info->transaction_wait, &wait,
TASK_UNINTERRUPTIBLE);
if (!cur_trans->blocked)
break;
mutex_unlock(&root->fs_info->trans_mutex);
schedule();
mutex_lock(&root->fs_info->trans_mutex);
}
finish_wait(&root->fs_info->transaction_wait, &wait);
put_transaction(cur_trans);
} else {
spin_unlock(&root->fs_info->trans_lock);
}
}
@ -167,10 +185,16 @@ enum btrfs_trans_type {
static int may_wait_transaction(struct btrfs_root *root, int type)
{
if (!root->fs_info->log_root_recovering &&
((type == TRANS_START && !root->fs_info->open_ioctl_trans) ||
type == TRANS_USERSPACE))
if (root->fs_info->log_root_recovering)
return 0;
if (type == TRANS_USERSPACE)
return 1;
if (type == TRANS_START &&
!atomic_read(&root->fs_info->open_ioctl_trans))
return 1;
return 0;
}
@ -184,36 +208,44 @@ static struct btrfs_trans_handle *start_transaction(struct btrfs_root *root,
if (root->fs_info->fs_state & BTRFS_SUPER_FLAG_ERROR)
return ERR_PTR(-EROFS);
if (current->journal_info) {
WARN_ON(type != TRANS_JOIN && type != TRANS_JOIN_NOLOCK);
h = current->journal_info;
h->use_count++;
h->orig_rsv = h->block_rsv;
h->block_rsv = NULL;
goto got_it;
}
again:
h = kmem_cache_alloc(btrfs_trans_handle_cachep, GFP_NOFS);
if (!h)
return ERR_PTR(-ENOMEM);
if (type != TRANS_JOIN_NOLOCK)
mutex_lock(&root->fs_info->trans_mutex);
if (may_wait_transaction(root, type))
wait_current_trans(root);
ret = join_transaction(root);
do {
ret = join_transaction(root, type == TRANS_JOIN_NOLOCK);
if (ret == -EBUSY)
wait_current_trans(root);
} while (ret == -EBUSY);
if (ret < 0) {
kmem_cache_free(btrfs_trans_handle_cachep, h);
if (type != TRANS_JOIN_NOLOCK)
mutex_unlock(&root->fs_info->trans_mutex);
return ERR_PTR(ret);
}
cur_trans = root->fs_info->running_transaction;
atomic_inc(&cur_trans->use_count);
if (type != TRANS_JOIN_NOLOCK)
mutex_unlock(&root->fs_info->trans_mutex);
h->transid = cur_trans->transid;
h->transaction = cur_trans;
h->blocks_used = 0;
h->block_group = 0;
h->bytes_reserved = 0;
h->delayed_ref_updates = 0;
h->use_count = 1;
h->block_rsv = NULL;
h->orig_rsv = NULL;
smp_mb();
if (cur_trans->blocked && may_wait_transaction(root, type)) {
@ -241,11 +273,8 @@ again:
}
}
if (type != TRANS_JOIN_NOLOCK)
mutex_lock(&root->fs_info->trans_mutex);
record_root_in_trans(h, root);
if (type != TRANS_JOIN_NOLOCK)
mutex_unlock(&root->fs_info->trans_mutex);
got_it:
btrfs_record_root_in_trans(h, root);
if (!current->journal_info && type != TRANS_USERSPACE)
current->journal_info = h;
@ -257,22 +286,19 @@ struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
{
return start_transaction(root, num_items, TRANS_START);
}
struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root,
int num_blocks)
struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root)
{
return start_transaction(root, 0, TRANS_JOIN);
}
struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root,
int num_blocks)
struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root)
{
return start_transaction(root, 0, TRANS_JOIN_NOLOCK);
}
struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *r,
int num_blocks)
struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root)
{
return start_transaction(r, 0, TRANS_USERSPACE);
return start_transaction(root, 0, TRANS_USERSPACE);
}
/* wait for a transaction commit to be fully complete */
@ -280,17 +306,13 @@ static noinline int wait_for_commit(struct btrfs_root *root,
struct btrfs_transaction *commit)
{
DEFINE_WAIT(wait);
mutex_lock(&root->fs_info->trans_mutex);
while (!commit->commit_done) {
prepare_to_wait(&commit->commit_wait, &wait,
TASK_UNINTERRUPTIBLE);
if (commit->commit_done)
break;
mutex_unlock(&root->fs_info->trans_mutex);
schedule();
mutex_lock(&root->fs_info->trans_mutex);
}
mutex_unlock(&root->fs_info->trans_mutex);
finish_wait(&commit->commit_wait, &wait);
return 0;
}
@ -300,59 +322,56 @@ int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid)
struct btrfs_transaction *cur_trans = NULL, *t;
int ret;
mutex_lock(&root->fs_info->trans_mutex);
ret = 0;
if (transid) {
if (transid <= root->fs_info->last_trans_committed)
goto out_unlock;
goto out;
/* find specified transaction */
spin_lock(&root->fs_info->trans_lock);
list_for_each_entry(t, &root->fs_info->trans_list, list) {
if (t->transid == transid) {
cur_trans = t;
atomic_inc(&cur_trans->use_count);
break;
}
if (t->transid > transid)
break;
}
spin_unlock(&root->fs_info->trans_lock);
ret = -EINVAL;
if (!cur_trans)
goto out_unlock; /* bad transid */
goto out; /* bad transid */
} else {
/* find newest transaction that is committing | committed */
spin_lock(&root->fs_info->trans_lock);
list_for_each_entry_reverse(t, &root->fs_info->trans_list,
list) {
if (t->in_commit) {
if (t->commit_done)
goto out_unlock;
goto out;
cur_trans = t;
atomic_inc(&cur_trans->use_count);
break;
}
}
spin_unlock(&root->fs_info->trans_lock);
if (!cur_trans)
goto out_unlock; /* nothing committing|committed */
goto out; /* nothing committing|committed */
}
atomic_inc(&cur_trans->use_count);
mutex_unlock(&root->fs_info->trans_mutex);
wait_for_commit(root, cur_trans);
mutex_lock(&root->fs_info->trans_mutex);
put_transaction(cur_trans);
ret = 0;
out_unlock:
mutex_unlock(&root->fs_info->trans_mutex);
out:
return ret;
}
void btrfs_throttle(struct btrfs_root *root)
{
mutex_lock(&root->fs_info->trans_mutex);
if (!root->fs_info->open_ioctl_trans)
if (!atomic_read(&root->fs_info->open_ioctl_trans))
wait_current_trans(root);
mutex_unlock(&root->fs_info->trans_mutex);
}
static int should_end_transaction(struct btrfs_trans_handle *trans,
@ -370,6 +389,7 @@ int btrfs_should_end_transaction(struct btrfs_trans_handle *trans,
struct btrfs_transaction *cur_trans = trans->transaction;
int updates;
smp_mb();
if (cur_trans->blocked || cur_trans->delayed_refs.flushing)
return 1;
@ -388,6 +408,11 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *info = root->fs_info;
int count = 0;
if (--trans->use_count) {
trans->block_rsv = trans->orig_rsv;
return 0;
}
while (count < 4) {
unsigned long cur = trans->delayed_ref_updates;
trans->delayed_ref_updates = 0;
@ -410,9 +435,11 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
btrfs_trans_release_metadata(trans, root);
if (lock && !root->fs_info->open_ioctl_trans &&
should_end_transaction(trans, root))
if (lock && !atomic_read(&root->fs_info->open_ioctl_trans) &&
should_end_transaction(trans, root)) {
trans->transaction->blocked = 1;
smp_wmb();
}
if (lock && cur_trans->blocked && !cur_trans->in_commit) {
if (throttle)
@ -703,9 +730,9 @@ static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans,
*/
int btrfs_add_dead_root(struct btrfs_root *root)
{
mutex_lock(&root->fs_info->trans_mutex);
spin_lock(&root->fs_info->trans_lock);
list_add(&root->root_list, &root->fs_info->dead_roots);
mutex_unlock(&root->fs_info->trans_mutex);
spin_unlock(&root->fs_info->trans_lock);
return 0;
}
@ -721,6 +748,7 @@ static noinline int commit_fs_roots(struct btrfs_trans_handle *trans,
int ret;
int err = 0;
spin_lock(&fs_info->fs_roots_radix_lock);
while (1) {
ret = radix_tree_gang_lookup_tag(&fs_info->fs_roots_radix,
(void **)gang, 0,
@ -733,6 +761,7 @@ static noinline int commit_fs_roots(struct btrfs_trans_handle *trans,
radix_tree_tag_clear(&fs_info->fs_roots_radix,
(unsigned long)root->root_key.objectid,
BTRFS_ROOT_TRANS_TAG);
spin_unlock(&fs_info->fs_roots_radix_lock);
btrfs_free_log(trans, root);
btrfs_update_reloc_root(trans, root);
@ -753,10 +782,12 @@ static noinline int commit_fs_roots(struct btrfs_trans_handle *trans,
err = btrfs_update_root(trans, fs_info->tree_root,
&root->root_key,
&root->root_item);
spin_lock(&fs_info->fs_roots_radix_lock);
if (err)
break;
}
}
spin_unlock(&fs_info->fs_roots_radix_lock);
return err;
}
@ -851,7 +882,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
parent = dget_parent(dentry);
parent_inode = parent->d_inode;
parent_root = BTRFS_I(parent_inode)->root;
record_root_in_trans(trans, parent_root);
btrfs_record_root_in_trans(trans, parent_root);
/*
* insert the directory item
@ -869,7 +900,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
ret = btrfs_update_inode(trans, parent_root, parent_inode);
BUG_ON(ret);
record_root_in_trans(trans, root);
btrfs_record_root_in_trans(trans, root);
btrfs_set_root_last_snapshot(&root->root_item, trans->transid);
memcpy(new_root_item, &root->root_item, sizeof(*new_root_item));
btrfs_check_and_init_root_item(new_root_item);
@ -967,20 +998,20 @@ static void update_super_roots(struct btrfs_root *root)
int btrfs_transaction_in_commit(struct btrfs_fs_info *info)
{
int ret = 0;
spin_lock(&info->new_trans_lock);
spin_lock(&info->trans_lock);
if (info->running_transaction)
ret = info->running_transaction->in_commit;
spin_unlock(&info->new_trans_lock);
spin_unlock(&info->trans_lock);
return ret;
}
int btrfs_transaction_blocked(struct btrfs_fs_info *info)
{
int ret = 0;
spin_lock(&info->new_trans_lock);
spin_lock(&info->trans_lock);
if (info->running_transaction)
ret = info->running_transaction->blocked;
spin_unlock(&info->new_trans_lock);
spin_unlock(&info->trans_lock);
return ret;
}
@ -1004,9 +1035,7 @@ static void wait_current_trans_commit_start(struct btrfs_root *root,
&wait);
break;
}
mutex_unlock(&root->fs_info->trans_mutex);
schedule();
mutex_lock(&root->fs_info->trans_mutex);
finish_wait(&root->fs_info->transaction_blocked_wait, &wait);
}
}
@ -1032,9 +1061,7 @@ static void wait_current_trans_commit_start_and_unblock(struct btrfs_root *root,
&wait);
break;
}
mutex_unlock(&root->fs_info->trans_mutex);
schedule();
mutex_lock(&root->fs_info->trans_mutex);
finish_wait(&root->fs_info->transaction_wait,
&wait);
}
@ -1072,7 +1099,7 @@ int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
INIT_DELAYED_WORK(&ac->work, do_async_commit);
ac->root = root;
ac->newtrans = btrfs_join_transaction(root, 0);
ac->newtrans = btrfs_join_transaction(root);
if (IS_ERR(ac->newtrans)) {
int err = PTR_ERR(ac->newtrans);
kfree(ac);
@ -1080,22 +1107,18 @@ int btrfs_commit_transaction_async(struct btrfs_trans_handle *trans,
}
/* take transaction reference */
mutex_lock(&root->fs_info->trans_mutex);
cur_trans = trans->transaction;
atomic_inc(&cur_trans->use_count);
mutex_unlock(&root->fs_info->trans_mutex);
btrfs_end_transaction(trans, root);
schedule_delayed_work(&ac->work, 0);
/* wait for transaction to start and unblock */
mutex_lock(&root->fs_info->trans_mutex);
if (wait_for_unblock)
wait_current_trans_commit_start_and_unblock(root, cur_trans);
else
wait_current_trans_commit_start(root, cur_trans);
put_transaction(cur_trans);
mutex_unlock(&root->fs_info->trans_mutex);
return 0;
}
@ -1139,38 +1162,41 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
ret = btrfs_run_delayed_refs(trans, root, 0);
BUG_ON(ret);
mutex_lock(&root->fs_info->trans_mutex);
spin_lock(&cur_trans->commit_lock);
if (cur_trans->in_commit) {
spin_unlock(&cur_trans->commit_lock);
atomic_inc(&cur_trans->use_count);
mutex_unlock(&root->fs_info->trans_mutex);
btrfs_end_transaction(trans, root);
ret = wait_for_commit(root, cur_trans);
BUG_ON(ret);
mutex_lock(&root->fs_info->trans_mutex);
put_transaction(cur_trans);
mutex_unlock(&root->fs_info->trans_mutex);
return 0;
}
trans->transaction->in_commit = 1;
trans->transaction->blocked = 1;
spin_unlock(&cur_trans->commit_lock);
wake_up(&root->fs_info->transaction_blocked_wait);
spin_lock(&root->fs_info->trans_lock);
if (cur_trans->list.prev != &root->fs_info->trans_list) {
prev_trans = list_entry(cur_trans->list.prev,
struct btrfs_transaction, list);
if (!prev_trans->commit_done) {
atomic_inc(&prev_trans->use_count);
mutex_unlock(&root->fs_info->trans_mutex);
spin_unlock(&root->fs_info->trans_lock);
wait_for_commit(root, prev_trans);
mutex_lock(&root->fs_info->trans_mutex);
put_transaction(prev_trans);
} else {
spin_unlock(&root->fs_info->trans_lock);
}
} else {
spin_unlock(&root->fs_info->trans_lock);
}
if (now < cur_trans->start_time || now - cur_trans->start_time < 1)
@ -1178,12 +1204,12 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
do {
int snap_pending = 0;
joined = cur_trans->num_joined;
if (!list_empty(&trans->transaction->pending_snapshots))
snap_pending = 1;
WARN_ON(cur_trans != trans->transaction);
mutex_unlock(&root->fs_info->trans_mutex);
if (flush_on_commit || snap_pending) {
btrfs_start_delalloc_inodes(root, 1);
@ -1206,14 +1232,15 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
prepare_to_wait(&cur_trans->writer_wait, &wait,
TASK_UNINTERRUPTIBLE);
smp_mb();
if (atomic_read(&cur_trans->num_writers) > 1)
schedule_timeout(MAX_SCHEDULE_TIMEOUT);
else if (should_grow)
schedule_timeout(1);
mutex_lock(&root->fs_info->trans_mutex);
finish_wait(&cur_trans->writer_wait, &wait);
spin_lock(&root->fs_info->trans_lock);
root->fs_info->trans_no_join = 1;
spin_unlock(&root->fs_info->trans_lock);
} while (atomic_read(&cur_trans->num_writers) > 1 ||
(should_grow && cur_trans->num_joined != joined));
@ -1258,9 +1285,6 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
btrfs_prepare_extent_commit(trans, root);
cur_trans = root->fs_info->running_transaction;
spin_lock(&root->fs_info->new_trans_lock);
root->fs_info->running_transaction = NULL;
spin_unlock(&root->fs_info->new_trans_lock);
btrfs_set_root_node(&root->fs_info->tree_root->root_item,
root->fs_info->tree_root->node);
@ -1281,10 +1305,13 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
sizeof(root->fs_info->super_copy));
trans->transaction->blocked = 0;
spin_lock(&root->fs_info->trans_lock);
root->fs_info->running_transaction = NULL;
root->fs_info->trans_no_join = 0;
spin_unlock(&root->fs_info->trans_lock);
wake_up(&root->fs_info->transaction_wait);
mutex_unlock(&root->fs_info->trans_mutex);
ret = btrfs_write_and_wait_transaction(trans, root);
BUG_ON(ret);
write_ctree_super(trans, root, 0);
@ -1297,22 +1324,21 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
btrfs_finish_extent_commit(trans, root);
mutex_lock(&root->fs_info->trans_mutex);
cur_trans->commit_done = 1;
root->fs_info->last_trans_committed = cur_trans->transid;
wake_up(&cur_trans->commit_wait);
spin_lock(&root->fs_info->trans_lock);
list_del_init(&cur_trans->list);
spin_unlock(&root->fs_info->trans_lock);
put_transaction(cur_trans);
put_transaction(cur_trans);
trace_btrfs_transaction_commit(root);
mutex_unlock(&root->fs_info->trans_mutex);
btrfs_scrub_continue(root);
if (current->journal_info == trans)
@ -1334,9 +1360,9 @@ int btrfs_clean_old_snapshots(struct btrfs_root *root)
LIST_HEAD(list);
struct btrfs_fs_info *fs_info = root->fs_info;
mutex_lock(&fs_info->trans_mutex);
spin_lock(&fs_info->trans_lock);
list_splice_init(&fs_info->dead_roots, &list);
mutex_unlock(&fs_info->trans_mutex);
spin_unlock(&fs_info->trans_lock);
while (!list_empty(&list)) {
root = list_entry(list.next, struct btrfs_root, root_list);

29
fs/btrfs/transaction.h
View File

@ -28,10 +28,12 @@ struct btrfs_transaction {
* transaction can end
*/
atomic_t num_writers;
atomic_t use_count;
unsigned long num_joined;
spinlock_t commit_lock;
int in_commit;
atomic_t use_count;
int commit_done;
int blocked;
struct list_head list;
@ -45,13 +47,14 @@ struct btrfs_transaction {
struct btrfs_trans_handle {
u64 transid;
u64 block_group;
u64 bytes_reserved;
unsigned long use_count;
unsigned long blocks_reserved;
unsigned long blocks_used;
unsigned long delayed_ref_updates;
struct btrfs_transaction *transaction;
struct btrfs_block_rsv *block_rsv;
struct btrfs_block_rsv *orig_rsv;
};
struct btrfs_pending_snapshot {
@ -66,19 +69,6 @@ struct btrfs_pending_snapshot {
struct list_head list;
};
static inline void btrfs_set_trans_block_group(struct btrfs_trans_handle *trans,
struct inode *inode)
{
trans->block_group = BTRFS_I(inode)->block_group;
}
static inline void btrfs_update_inode_block_group(
struct btrfs_trans_handle *trans,
struct inode *inode)
{
BTRFS_I(inode)->block_group = trans->block_group;
}
static inline void btrfs_set_inode_last_trans(struct btrfs_trans_handle *trans,
struct inode *inode)
{
@ -92,12 +82,9 @@ int btrfs_end_transaction_nolock(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
struct btrfs_trans_handle *btrfs_start_transaction(struct btrfs_root *root,
int num_items);
struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root,
int num_blocks);
struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root,
int num_blocks);
struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *r,
int num_blocks);
struct btrfs_trans_handle *btrfs_join_transaction(struct btrfs_root *root);
struct btrfs_trans_handle *btrfs_join_transaction_nolock(struct btrfs_root *root);
struct btrfs_trans_handle *btrfs_start_ioctl_transaction(struct btrfs_root *root);
int btrfs_wait_for_commit(struct btrfs_root *root, u64 transid);
int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans,
struct btrfs_root *root);

2
fs/btrfs/xattr.c
View File

@ -158,8 +158,6 @@ int __btrfs_setxattr(struct btrfs_trans_handle *trans,
if (IS_ERR(trans))
return PTR_ERR(trans);
btrfs_set_trans_block_group(trans, inode);
ret = do_setxattr(trans, inode, name, value, size, flags);
if (ret)
goto out;