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authorJan Kara <jack@suse.cz>2011-03-31 18:36:52 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2011-04-14 13:02:22 -0700
commit3f9346cf211cdb10f053d7cb9752f7fd6723e16b (patch)
tree21e43874203c69b108ca87e0ea7c5f831d51ce43 /fs
parent0b23e6b9d92cd5f7faa1450cbd41bad5dce4d207 (diff)
downloadlinux-linaro-android-3f9346cf211cdb10f053d7cb9752f7fd6723e16b.tar.gz
quota: Don't write quota info in dquot_commit()
commit b03f24567ce7caf2420b8be4c6eb74c191d59a91 upstream. There's no reason to write quota info in dquot_commit(). The writing is a relict from the old days when we didn't have dquot_acquire() and dquot_release() and thus dquot_commit() could have created / removed quota structures from the file. These days dquot_commit() only updates usage counters / limits in quota structure and thus there's no need to write quota info. This also fixes an issue with journaling filesystem which didn't reserve enough space in the transaction for write of quota info (it could have been dirty at the time of dquot_commit() because of a race with other operation changing it). Reported-and-tested-by: Lukas Czerner <lczerner@redhat.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs')
-rw-r--r--fs/quota/dquot.c13
1 files changed, 4 insertions, 9 deletions
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index a2a622e079f..b59ee61f4b9 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -442,7 +442,7 @@ EXPORT_SYMBOL(dquot_acquire);
*/
int dquot_commit(struct dquot *dquot)
{
- int ret = 0, ret2 = 0;
+ int ret = 0;
struct quota_info *dqopt = sb_dqopt(dquot->dq_sb);
mutex_lock(&dqopt->dqio_mutex);
@@ -454,15 +454,10 @@ int dquot_commit(struct dquot *dquot)
spin_unlock(&dq_list_lock);
/* Inactive dquot can be only if there was error during read/init
* => we have better not writing it */
- if (test_bit(DQ_ACTIVE_B, &dquot->dq_flags)) {
+ if (test_bit(DQ_ACTIVE_B, &dquot->dq_flags))
ret = dqopt->ops[dquot->dq_type]->commit_dqblk(dquot);
- if (info_dirty(&dqopt->info[dquot->dq_type])) {
- ret2 = dqopt->ops[dquot->dq_type]->write_file_info(
- dquot->dq_sb, dquot->dq_type);
- }
- if (ret >= 0)
- ret = ret2;
- }
+ else
+ ret = -EIO;
out_sem:
mutex_unlock(&dqopt->dqio_mutex);
return ret;