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| author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-10-08 10:19:28 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-10-08 10:19:28 +0900 |
| commit | ccaaca25919a2cdeccd8fdce5f546e3ed7f6a9e9 (patch) | |
| tree | 225d4bc2a01b6e6331081754af1beb9875ea34be | |
| parent | 5887d291d792773368f6eaf1759aad109bcd78eb (diff) | |
| download | linux-ccaaca25919a2cdeccd8fdce5f546e3ed7f6a9e9.tar.bz2 | |
f2fs: fix writing incorrect orphan blocks
Previously, there was a erroneous scenario like below.
thread 1: thread 2:
f2fs_unlink
- acquire_orphan_inode
: sbi->n_orphans++ write_checkpoint
- block_operations
: f2fs_lock_all
- do_checkpoint
: write orphan blocks with sbi->n_orphans
- unblock_operations
- f2fs_lock_op
- release_orphan_inode
- f2fs_unlock_op
During the checkpoint by thread 2, f2fs stores a wrong orphan block according
to the wrong sbi->n_orphans.
To avoid this, simply we should make cover acquire_orphan_inode too with
f2fs_lock_op.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| -rw-r--r-- | fs/f2fs/namei.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c index 29f73fdf958e..575adac17f8b 100644 --- a/fs/f2fs/namei.c +++ b/fs/f2fs/namei.c @@ -228,14 +228,14 @@ static int f2fs_unlink(struct inode *dir, struct dentry *dentry) if (!de) goto fail; + f2fs_lock_op(sbi); err = acquire_orphan_inode(sbi); if (err) { + f2fs_unlock_op(sbi); kunmap(page); f2fs_put_page(page, 0); goto fail; } - - f2fs_lock_op(sbi); f2fs_delete_entry(de, page, inode); f2fs_unlock_op(sbi); |