linux-ext4 - [PATCH] ext4: Set directory link count to zero if we fail to create the directory.

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Message-Id: <1202834708-961-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
Date:	Tue, 12 Feb 2008 22:15:08 +0530
From:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
To:	tytso@....edu, cmm@...ibm.com
Cc:	linux-ext4@...r.kernel.org,
	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>
Subject: [PATCH] ext4: Set directory link count to zero if we fail to create the directory.

With ext4 we fail directory creation if we fail to allocate initial
block for the directory. With EXT4_FEATURE_RO_COMPAT_DIR_NLINK,
if we fail to create the directory, the inode link count was wrongly
set to 1.  This cause e2fsck throws the below warning

Inode 1015 is a zero-length directory.  Clear? yes
Inode 1120 is a zero-length directory.  Clear? yes
Inode 1121 is a zero-length directory.  Clear? yes

Fix the same by dropping the inode link count using drop_nlink

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@...ux.vnet.ibm.com>
---
 fs/ext4/namei.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index a9347fb..fd3b031 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -1805,7 +1805,7 @@ retry:
 	inode->i_size = EXT4_I(inode)->i_disksize = inode->i_sb->s_blocksize;
 	dir_block = ext4_bread (handle, inode, 0, 1, &err);
 	if (!dir_block) {
-		ext4_dec_count(handle, inode); /* is this nlink == 0? */
+		drop_nlink(inode);
 		ext4_mark_inode_dirty(handle, inode);
 		iput (inode);
 		goto out_stop;
-- 
1.5.4.1.97.g40aab-dirty

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