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ext4: Fix hang on umount with quotas when journal is aborted 

Call dquot_drop() from ext4_dquot_drop() even if we fail to start a
transaction. Otherwise we never get to dropping references to quota structures
from the inode and umount will hang indefinitely.  Thanks to Payphone LIOU for
spotting the problem.

Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Mingming Cao <cmm@us.ibm.com>
CC: Payphone LIOU <lioupayphone@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Jan Kara 2008-04-29 22:02:07 -04:00 committed by Theodore Ts'o
parent 53b7e9f680
commit 2887df139c
1 changed files with 7 additions and 1 deletions
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8
fs/ext4/super.c
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@ -3040,8 +3040,14 @@ static int ext4_dquot_drop(struct inode *inode)
/* We may delete quota structure so we need to reserve enough blocks */
handle = ext4_journal_start(inode, 2*EXT4_QUOTA_DEL_BLOCKS(inode->i_sb));
if (IS_ERR(handle))
if (IS_ERR(handle)) {
/*
* We call dquot_drop() anyway to at least release references
* to quota structures so that umount does not hang.
*/
dquot_drop(inode);
return PTR_ERR(handle);
}
ret = dquot_drop(inode);
err = ext4_journal_stop(handle);
if (!ret)