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Btrfs: Metadata ENOSPC handling for tree log 

Previous patches make the allocater return -ENOSPC if there is no
unreserved free metadata space. This patch updates tree log code
and various other places to propagate/handle the ENOSPC error.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
hifive-unleashed-5.1
Yan, Zheng 2010-05-16 10:49:59 -04:00 committed by Chris Mason
parent d68fc57b7e
commit 4a500fd178
5 changed files with 156 additions and 128 deletions
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36
fs/btrfs/disk-io.c
View File

@ -972,42 +972,6 @@ static int find_and_setup_root(struct btrfs_root *tree_root,
return 0;
}
int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info)
{
struct extent_buffer *eb;
struct btrfs_root *log_root_tree = fs_info->log_root_tree;
u64 start = 0;
u64 end = 0;
int ret;
if (!log_root_tree)
return 0;
while (1) {
ret = find_first_extent_bit(&log_root_tree->dirty_log_pages,
0, &start, &end, EXTENT_DIRTY | EXTENT_NEW);
if (ret)
break;
clear_extent_bits(&log_root_tree->dirty_log_pages, start, end,
EXTENT_DIRTY | EXTENT_NEW, GFP_NOFS);
}
eb = fs_info->log_root_tree->node;
WARN_ON(btrfs_header_level(eb) != 0);
WARN_ON(btrfs_header_nritems(eb) != 0);
ret = btrfs_free_reserved_extent(fs_info->tree_root,
eb->start, eb->len);
BUG_ON(ret);
free_extent_buffer(eb);
kfree(fs_info->log_root_tree);
fs_info->log_root_tree = NULL;
return 0;
}
static struct btrfs_root *alloc_log_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info)
{

2
fs/btrfs/disk-io.h
View File

@ -95,8 +95,6 @@ int btrfs_congested_async(struct btrfs_fs_info *info, int iodone);
unsigned long btrfs_async_submit_limit(struct btrfs_fs_info *info);
int btrfs_write_tree_block(struct extent_buffer *buf);
int btrfs_wait_tree_block_writeback(struct extent_buffer *buf);
int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
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,

3
fs/btrfs/file-item.c
View File

@ -657,6 +657,9 @@ again:
goto found;
}
ret = PTR_ERR(item);
if (ret != -EFBIG && ret != -ENOENT)
goto fail_unlock;
if (ret == -EFBIG) {
u32 item_size;
/* we found one, but it isn't big enough yet */

241
fs/btrfs/tree-log.c
View File

@ -135,6 +135,7 @@ static int start_log_trans(struct btrfs_trans_handle *trans,
struct btrfs_root *root)
{
int ret;
int err = 0;
mutex_lock(&root->log_mutex);
if (root->log_root) {
@ -155,17 +156,19 @@ static int start_log_trans(struct btrfs_trans_handle *trans,
mutex_lock(&root->fs_info->tree_log_mutex);
if (!root->fs_info->log_root_tree) {
ret = btrfs_init_log_root_tree(trans, root->fs_info);
BUG_ON(ret);
if (ret)
err = ret;
}
if (!root->log_root) {
if (err == 0 && !root->log_root) {
ret = btrfs_add_log_tree(trans, root);
BUG_ON(ret);
if (ret)
err = ret;
}
mutex_unlock(&root->fs_info->tree_log_mutex);
root->log_batch++;
atomic_inc(&root->log_writers);
mutex_unlock(&root->log_mutex);
return 0;
return err;
}
/*
@ -376,7 +379,7 @@ insert:
BUG_ON(ret);
}
} else if (ret) {
BUG();
return ret;
}
dst_ptr = btrfs_item_ptr_offset(path->nodes[0],
path->slots[0]);
@ -1699,9 +1702,9 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans,
next = btrfs_find_create_tree_block(root, bytenr, blocksize);
wc->process_func(root, next, wc, ptr_gen);
if (*level == 1) {
wc->process_func(root, next, wc, ptr_gen);
path->slots[*level]++;
if (wc->free) {
btrfs_read_buffer(next, ptr_gen);
@ -1734,35 +1737,7 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans,
WARN_ON(*level < 0);
WARN_ON(*level >= BTRFS_MAX_LEVEL);
if (path->nodes[*level] == root->node)
parent = path->nodes[*level];
else
parent = path->nodes[*level + 1];
bytenr = path->nodes[*level]->start;
blocksize = btrfs_level_size(root, *level);
root_owner = btrfs_header_owner(parent);
root_gen = btrfs_header_generation(parent);
wc->process_func(root, path->nodes[*level], wc,
btrfs_header_generation(path->nodes[*level]));
if (wc->free) {
next = path->nodes[*level];
btrfs_tree_lock(next);
clean_tree_block(trans, root, next);
btrfs_set_lock_blocking(next);
btrfs_wait_tree_block_writeback(next);
btrfs_tree_unlock(next);
WARN_ON(root_owner != BTRFS_TREE_LOG_OBJECTID);
ret = btrfs_free_reserved_extent(root, bytenr, blocksize);
BUG_ON(ret);
}
free_extent_buffer(path->nodes[*level]);
path->nodes[*level] = NULL;
*level += 1;
path->slots[*level] = btrfs_header_nritems(path->nodes[*level]);
cond_resched();
return 0;
@ -1781,7 +1756,7 @@ static noinline int walk_up_log_tree(struct btrfs_trans_handle *trans,
for (i = *level; i < BTRFS_MAX_LEVEL - 1 && path->nodes[i]; i++) {
slot = path->slots[i];
if (slot < btrfs_header_nritems(path->nodes[i]) - 1) {
if (slot + 1 < btrfs_header_nritems(path->nodes[i])) {
struct extent_buffer *node;
node = path->nodes[i];
path->slots[i]++;
@ -2047,7 +2022,6 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
mutex_unlock(&log_root_tree->log_mutex);
ret = update_log_root(trans, log);
BUG_ON(ret);
mutex_lock(&log_root_tree->log_mutex);
if (atomic_dec_and_test(&log_root_tree->log_writers)) {
@ -2056,6 +2030,15 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
wake_up(&log_root_tree->log_writer_wait);
}
if (ret) {
BUG_ON(ret != -ENOSPC);
root->fs_info->last_trans_log_full_commit = trans->transid;
btrfs_wait_marked_extents(log, &log->dirty_log_pages, mark);
mutex_unlock(&log_root_tree->log_mutex);
ret = -EAGAIN;
goto out;
}
index2 = log_root_tree->log_transid % 2;
if (atomic_read(&log_root_tree->log_commit[index2])) {
btrfs_wait_marked_extents(log, &log->dirty_log_pages, mark);
@ -2129,15 +2112,10 @@ out:
return 0;
}
/*
* free all the extents used by the tree log. This should be called
* at commit time of the full transaction
*/
int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root)
static void free_log_tree(struct btrfs_trans_handle *trans,
struct btrfs_root *log)
{
int ret;
struct btrfs_root *log;
struct key;
u64 start;
u64 end;
struct walk_control wc = {
@ -2145,10 +2123,6 @@ int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root)
.process_func = process_one_buffer
};
if (!root->log_root || root->fs_info->log_root_recovering)
return 0;
log = root->log_root;
ret = walk_log_tree(trans, log, &wc);
BUG_ON(ret);
@ -2162,14 +2136,30 @@ int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root)
EXTENT_DIRTY | EXTENT_NEW, GFP_NOFS);
}
if (log->log_transid > 0) {
ret = btrfs_del_root(trans, root->fs_info->log_root_tree,
&log->root_key);
BUG_ON(ret);
}
root->log_root = NULL;
free_extent_buffer(log->node);
kfree(log);
}
/*
* free all the extents used by the tree log. This should be called
* at commit time of the full transaction
*/
int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root)
{
if (root->log_root) {
free_log_tree(trans, root->log_root);
root->log_root = NULL;
}
return 0;
}
int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info)
{
if (fs_info->log_root_tree) {
free_log_tree(trans, fs_info->log_root_tree);
fs_info->log_root_tree = NULL;
}
return 0;
}
@ -2203,6 +2193,7 @@ int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
struct btrfs_dir_item *di;
struct btrfs_path *path;
int ret;
int err = 0;
int bytes_del = 0;
if (BTRFS_I(dir)->logged_trans < trans->transid)
@ -2218,7 +2209,11 @@ int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
path = btrfs_alloc_path();
di = btrfs_lookup_dir_item(trans, log, path, dir->i_ino,
name, name_len, -1);
if (di && !IS_ERR(di)) {
if (IS_ERR(di)) {
err = PTR_ERR(di);
goto fail;
}
if (di) {
ret = btrfs_delete_one_dir_name(trans, log, path, di);
bytes_del += name_len;
BUG_ON(ret);
@ -2226,7 +2221,11 @@ int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
btrfs_release_path(log, path);
di = btrfs_lookup_dir_index_item(trans, log, path, dir->i_ino,
index, name, name_len, -1);
if (di && !IS_ERR(di)) {
if (IS_ERR(di)) {
err = PTR_ERR(di);
goto fail;
}
if (di) {
ret = btrfs_delete_one_dir_name(trans, log, path, di);
bytes_del += name_len;
BUG_ON(ret);
@ -2244,6 +2243,10 @@ int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
btrfs_release_path(log, path);
ret = btrfs_search_slot(trans, log, &key, path, 0, 1);
if (ret < 0) {
err = ret;
goto fail;
}
if (ret == 0) {
struct btrfs_inode_item *item;
u64 i_size;
@ -2261,9 +2264,13 @@ int btrfs_del_dir_entries_in_log(struct btrfs_trans_handle *trans,
ret = 0;
btrfs_release_path(log, path);
}
fail:
btrfs_free_path(path);
mutex_unlock(&BTRFS_I(dir)->log_mutex);
if (ret == -ENOSPC) {
root->fs_info->last_trans_log_full_commit = trans->transid;
ret = 0;
}
btrfs_end_log_trans(root);
return 0;
@ -2291,6 +2298,10 @@ int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
ret = btrfs_del_inode_ref(trans, log, name, name_len, inode->i_ino,
dirid, &index);
mutex_unlock(&BTRFS_I(inode)->log_mutex);
if (ret == -ENOSPC) {
root->fs_info->last_trans_log_full_commit = trans->transid;
ret = 0;
}
btrfs_end_log_trans(root);
return ret;
@ -2318,7 +2329,8 @@ static noinline int insert_dir_log_key(struct btrfs_trans_handle *trans,
else
key.type = BTRFS_DIR_LOG_INDEX_KEY;
ret = btrfs_insert_empty_item(trans, log, path, &key, sizeof(*item));
BUG_ON(ret);
if (ret)
return ret;
item = btrfs_item_ptr(path->nodes[0], path->slots[0],
struct btrfs_dir_log_item);
@ -2343,6 +2355,7 @@ static noinline int log_dir_items(struct btrfs_trans_handle *trans,
struct btrfs_key max_key;
struct btrfs_root *log = root->log_root;
struct extent_buffer *src;
int err = 0;
int ret;
int i;
int nritems;
@ -2405,6 +2418,10 @@ static noinline int log_dir_items(struct btrfs_trans_handle *trans,
ret = overwrite_item(trans, log, dst_path,
path->nodes[0], path->slots[0],
&tmp);
if (ret) {
err = ret;
goto done;
}
}
}
btrfs_release_path(root, path);
@ -2432,7 +2449,10 @@ static noinline int log_dir_items(struct btrfs_trans_handle *trans,
goto done;
ret = overwrite_item(trans, log, dst_path, src, i,
&min_key);
BUG_ON(ret);
if (ret) {
err = ret;
goto done;
}
}
path->slots[0] = nritems;
@ -2454,22 +2474,30 @@ static noinline int log_dir_items(struct btrfs_trans_handle *trans,
ret = overwrite_item(trans, log, dst_path,
path->nodes[0], path->slots[0],
&tmp);
BUG_ON(ret);
last_offset = tmp.offset;
if (ret)
err = ret;
else
last_offset = tmp.offset;
goto done;
}
}
done:
*last_offset_ret = last_offset;
btrfs_release_path(root, path);
btrfs_release_path(log, dst_path);
/* insert the log range keys to indicate where the log is valid */
ret = insert_dir_log_key(trans, log, path, key_type, inode->i_ino,
first_offset, last_offset);
BUG_ON(ret);
return 0;
if (err == 0) {
*last_offset_ret = last_offset;
/*
* insert the log range keys to indicate where the log
* is valid
*/
ret = insert_dir_log_key(trans, log, path, key_type,
inode->i_ino, first_offset,
last_offset);
if (ret)
err = ret;
}
return err;
}
/*
@ -2501,7 +2529,8 @@ again:
ret = log_dir_items(trans, root, inode, path,
dst_path, key_type, min_key,
&max_key);
BUG_ON(ret);
if (ret)
return ret;
if (max_key == (u64)-1)
break;
min_key = max_key + 1;
@ -2535,8 +2564,8 @@ static int drop_objectid_items(struct btrfs_trans_handle *trans,
while (1) {
ret = btrfs_search_slot(trans, log, &key, path, -1, 1);
if (ret != 1)
BUG_ON(ret == 0);
if (ret < 0)
break;
if (path->slots[0] == 0)
@ -2554,7 +2583,7 @@ static int drop_objectid_items(struct btrfs_trans_handle *trans,
btrfs_release_path(log, path);
}
btrfs_release_path(log, path);
return 0;
return ret;
}
static noinline int copy_items(struct btrfs_trans_handle *trans,
@ -2587,7 +2616,10 @@ static noinline int copy_items(struct btrfs_trans_handle *trans,
}
ret = btrfs_insert_empty_items(trans, log, dst_path,
ins_keys, ins_sizes, nr);
BUG_ON(ret);
if (ret) {
kfree(ins_data);
return ret;
}
for (i = 0; i < nr; i++, dst_path->slots[0]++) {
dst_offset = btrfs_item_ptr_offset(dst_path->nodes[0],
@ -2660,16 +2692,17 @@ static noinline int copy_items(struct btrfs_trans_handle *trans,
* we have to do this after the loop above to avoid changing the
* log tree while trying to change the log tree.
*/
ret = 0;
while (!list_empty(&ordered_sums)) {
struct btrfs_ordered_sum *sums = list_entry(ordered_sums.next,
struct btrfs_ordered_sum,
list);
ret = btrfs_csum_file_blocks(trans, log, sums);
BUG_ON(ret);
if (!ret)
ret = btrfs_csum_file_blocks(trans, log, sums);
list_del(&sums->list);
kfree(sums);
}
return 0;
return ret;
}
/* log a single inode in the tree log.
@ -2697,6 +2730,7 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
struct btrfs_root *log = root->log_root;
struct extent_buffer *src = NULL;
u32 size;
int err = 0;
int ret;
int nritems;
int ins_start_slot = 0;
@ -2739,7 +2773,10 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
} else {
ret = btrfs_truncate_inode_items(trans, log, inode, 0, 0);
}
BUG_ON(ret);
if (ret) {
err = ret;
goto out_unlock;
}
path->keep_locks = 1;
while (1) {
@ -2768,7 +2805,10 @@ again:
ret = copy_items(trans, log, dst_path, src, ins_start_slot,
ins_nr, inode_only);
BUG_ON(ret);
if (ret) {
err = ret;
goto out_unlock;
}
ins_nr = 1;
ins_start_slot = path->slots[0];
next_slot:
@ -2784,7 +2824,10 @@ next_slot:
ret = copy_items(trans, log, dst_path, src,
ins_start_slot,
ins_nr, inode_only);
BUG_ON(ret);
if (ret) {
err = ret;
goto out_unlock;
}
ins_nr = 0;
}
btrfs_release_path(root, path);
@ -2802,7 +2845,10 @@ next_slot:
ret = copy_items(trans, log, dst_path, src,
ins_start_slot,
ins_nr, inode_only);
BUG_ON(ret);
if (ret) {
err = ret;
goto out_unlock;
}
ins_nr = 0;
}
WARN_ON(ins_nr);
@ -2810,14 +2856,18 @@ next_slot:
btrfs_release_path(root, path);
btrfs_release_path(log, dst_path);
ret = log_directory_changes(trans, root, inode, path, dst_path);
BUG_ON(ret);
if (ret) {
err = ret;
goto out_unlock;
}
}
BTRFS_I(inode)->logged_trans = trans->transid;
out_unlock:
mutex_unlock(&BTRFS_I(inode)->log_mutex);
btrfs_free_path(path);
btrfs_free_path(dst_path);
return 0;
return err;
}
/*
@ -2942,10 +2992,13 @@ int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
goto end_no_trans;
}
start_log_trans(trans, root);
ret = start_log_trans(trans, root);
if (ret)
goto end_trans;
ret = btrfs_log_inode(trans, root, inode, inode_only);
BUG_ON(ret);
if (ret)
goto end_trans;
/*
* for regular files, if its inode is already on disk, we don't
@ -2955,8 +3008,10 @@ int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
*/
if (S_ISREG(inode->i_mode) &&
BTRFS_I(inode)->generation <= last_committed &&
BTRFS_I(inode)->last_unlink_trans <= last_committed)
goto no_parent;
BTRFS_I(inode)->last_unlink_trans <= last_committed) {
ret = 0;
goto end_trans;
}
inode_only = LOG_INODE_EXISTS;
while (1) {
@ -2970,15 +3025,21 @@ int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
if (BTRFS_I(inode)->generation >
root->fs_info->last_trans_committed) {
ret = btrfs_log_inode(trans, root, inode, inode_only);
BUG_ON(ret);
if (ret)
goto end_trans;
}
if (IS_ROOT(parent))
break;
parent = parent->d_parent;
}
no_parent:
ret = 0;
end_trans:
if (ret < 0) {
BUG_ON(ret != -ENOSPC);
root->fs_info->last_trans_log_full_commit = trans->transid;
ret = 1;
}
btrfs_end_log_trans(root);
end_no_trans:
return ret;
@ -3020,7 +3081,7 @@ int btrfs_recover_log_trees(struct btrfs_root *log_root_tree)
path = btrfs_alloc_path();
BUG_ON(!path);
trans = btrfs_start_transaction(fs_info->tree_root, 1);
trans = btrfs_start_transaction(fs_info->tree_root, 0);
wc.trans = trans;
wc.pin = 1;

2
fs/btrfs/tree-log.h
View File

@ -25,6 +25,8 @@
int btrfs_sync_log(struct btrfs_trans_handle *trans,
struct btrfs_root *root);
int btrfs_free_log(struct btrfs_trans_handle *trans, struct btrfs_root *root);
int btrfs_free_log_root_tree(struct btrfs_trans_handle *trans,
struct btrfs_fs_info *fs_info);
int btrfs_recover_log_trees(struct btrfs_root *tree_root);
int btrfs_log_dentry_safe(struct btrfs_trans_handle *trans,
struct btrfs_root *root, struct dentry *dentry);