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Btrfs: make sure we cleanup all reloc roots if error happens 

I hit an oops when merging reloc roots fails, the reason is that
new reloc roots may be added and we should make sure we cleanup
all reloc roots.

Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Wang Shilong 2013-12-11 19:29:52 +08:00 committed by Chris Mason
parent 6646374863
commit 467bb1d27c
1 changed files with 7 additions and 0 deletions
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7
fs/btrfs/relocation.c
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@ -2409,6 +2409,13 @@ out:
btrfs_std_error(root->fs_info, ret);
if (!list_empty(&reloc_roots))
free_reloc_roots(&reloc_roots);
/* new reloc root may be added */
mutex_lock(&root->fs_info->reloc_mutex);
list_splice_init(&rc->reloc_roots, &reloc_roots);
mutex_unlock(&root->fs_info->reloc_mutex);
if (!list_empty(&reloc_roots))
free_reloc_roots(&reloc_roots);
}
BUG_ON(!RB_EMPTY_ROOT(&rc->reloc_root_tree.rb_root));