From: Liu Xue <liuxueliu.liu@huawei.com>
Date: Fri, 26 Feb 2016 06:39:23 +0000 (+0000)
Subject: f2fs: recovery missing dot dentries in root directory
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=8c2b1435b9f48904aaa9401d12b800ca8c4dae05;p=linux-beck.git

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>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---

diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 01b9ef6ac581..b3c423a645bc 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 (dentry->d_name.len > F2FS_NAME_LEN)
 		return ERR_PTR(-ENAMETOOLONG);
@@ -276,6 +277,12 @@ 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)