[RFC PATCH] f2fs: recovery missing dot dentries in root directory

[RFC PATCH] f2fs: recovery missing dot dentries in root directory

[Liu Xue]

If f2fs was corrupted with missing dot dentries in root dirctory,
it needs to recover them after fsck.f2fs set F2FS_INLINE_DOTS flag
in directory inode when fsck.f2fs detects missing dot dentries.

Signed-off-by: Xue Liu <liuxueliu.liu@huawei.com>
Signed-off-by: Yong Sheng <shengyong1@huawei.com>
---
 fs/f2fs/namei.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 55a7362..7b07a47 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -260,6 +260,7 @@ static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 	struct page *page;
 	nid_t ino;
 	int err = 0;
+	unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
 
 	if (f2fs_encrypted_inode(dir)) {
 		int res = fscrypt_get_encryption_info(dir);
@@ -291,6 +292,12 @@ static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 	if (IS_ERR(inode))
 		return ERR_CAST(inode);
 
+	if ((dir->i_ino == root_ino) && f2fs_has_inline_dots(dir)) {
+		err = __recover_dot_dentries(dir, root_ino);
+		if (err)
+			goto err_out;
+	}
+
 	if (f2fs_has_inline_dots(inode)) {
 		err = __recover_dot_dentries(inode, dir->i_ino);
 		if (err)
-- 
1.8.5.2


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Re: [RFC PATCH] f2fs: recovery missing dot dentries in root directory

[Chao Yu]

> -----Original Message-----
> From: Liu Xue [mailto:liuxueliu.liu@huawei.com]
> Sent: Friday, February 26, 2016 2:39 PM
> To: linux-f2fs-devel@lists.sourceforge.net; jaegeuk@kernel.org
> Subject: [f2fs-dev] [RFC PATCH] f2fs: recovery missing dot dentries in root directory
> 
> If f2fs was corrupted with missing dot dentries in root dirctory,
> it needs to recover them after fsck.f2fs set F2FS_INLINE_DOTS flag
> in directory inode when fsck.f2fs detects missing dot dentries.
> 
> Signed-off-by: Xue Liu <liuxueliu.liu@huawei.com>
> Signed-off-by: Yong Sheng <shengyong1@huawei.com>

Reviewed-by: Chao Yu <chao2.yu@samsung.com>


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