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| author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-05-28 02:19:22 +0200 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-05-28 08:03:05 +0200 |
| commit | 6b8213d9a4ca0d7a02a38757068ba79cd96206f0 (patch) | |
| tree | 54e025076a5828ec02cff72c579bea3f9d738fa9 /fs/f2fs | |
| parent | f2fs: iput only if whole data blocks are flushed (diff) | |
| download | linux-6b8213d9a4ca0d7a02a38757068ba79cd96206f0.tar.xz linux-6b8213d9a4ca0d7a02a38757068ba79cd96206f0.zip | |
f2fs: fix dentry recovery routine
The error scenario is:
1. create /a
(1.a link /a /b)
2. sync
3. unlinke /a
4. create /a
5. fsync /a
6. Sudden power-off
When the f2fs recovers the fsynced dentry, /a, we discover an exsiting dentry at
f2fs_find_entry() in recover_dentry().
In such the case, we should unlink the existing dentry and its inode
and then recover newly created dentry.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs')
| -rw-r--r-- | fs/f2fs/recovery.c | 24 |
1 files changed, 19 insertions, 5 deletions
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c index 0dd2ce1b492f..539ca32f4483 100644 --- a/fs/f2fs/recovery.c +++ b/fs/f2fs/recovery.c @@ -44,9 +44,10 @@ static int recover_dentry(struct page *ipage, struct inode *inode) struct f2fs_node *raw_node = (struct f2fs_node *)kaddr; struct f2fs_inode *raw_inode = &(raw_node->i); nid_t pino = le32_to_cpu(raw_inode->i_pino); + struct f2fs_dir_entry *de; struct qstr name; struct page *page; - struct inode *dir; + struct inode *dir, *einode; int err = 0; dir = check_dirty_dir_inode(F2FS_SB(inode->i_sb), pino); @@ -61,13 +62,26 @@ static int recover_dentry(struct page *ipage, struct inode *inode) name.len = le32_to_cpu(raw_inode->i_namelen); name.name = raw_inode->i_name; - - if (f2fs_find_entry(dir, &name, &page)) { +retry: + de = f2fs_find_entry(dir, &name, &page); + if (de && inode->i_ino == le32_to_cpu(de->ino)) { kunmap(page); f2fs_put_page(page, 0); - } else { - err = __f2fs_add_link(dir, &name, inode); + goto out; + } + if (de) { + einode = f2fs_iget(inode->i_sb, le32_to_cpu(de->ino)); + if (IS_ERR(einode)) { + WARN_ON(1); + if (PTR_ERR(einode) == -ENOENT) + err = -EEXIST; + goto out; + } + f2fs_delete_entry(de, page, einode); + iput(einode); + goto retry; } + err = __f2fs_add_link(dir, &name, inode); out: f2fs_msg(inode->i_sb, KERN_NOTICE, "recover_inode and its dentry: " "ino = %x, name = %s, dir = %lx, err = %d", |