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quota: Push dqio_sem down to ->release_dqblk()

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Push down acquisition of dqio_sem into ->release_dqblk() callback. It
will allow quota formats to decide whether they need it or not.

Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Jan Kara 2017-06-08 17:20:36 +02:00
parent f0c5bae5cc
commit b9a1a7f4b6
2 changed files with 10 additions and 3 deletions
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4
fs/quota/dquot.c
View File

@ -478,19 +478,19 @@ int dquot_release(struct dquot *dquot)
/* Check whether we are not racing with some other dqget() */
if (atomic_read(&dquot->dq_count) > 1)
goto out_dqlock;
down_write(&dqopt->dqio_sem);
if (dqopt->ops[dquot->dq_id.type]->release_dqblk) {
ret = dqopt->ops[dquot->dq_id.type]->release_dqblk(dquot);
/* Write the info */
if (info_dirty(&dqopt->info[dquot->dq_id.type])) {
down_write(&dqopt->dqio_sem);
ret2 = dqopt->ops[dquot->dq_id.type]->write_file_info(
dquot->dq_sb, dquot->dq_id.type);
up_write(&dqopt->dqio_sem);
}
if (ret >= 0)
ret = ret2;
}
clear_bit(DQ_ACTIVE_B, &dquot->dq_flags);
up_write(&dqopt->dqio_sem);
out_dqlock:
mutex_unlock(&dquot->dq_lock);
return ret;

9
fs/quota/quota_v2.c
View File

@ -322,7 +322,14 @@ static int v2_write_dquot(struct dquot *dquot)
static int v2_release_dquot(struct dquot *dquot)
{
return qtree_release_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv, dquot);
struct quota_info *dqopt = sb_dqopt(dquot->dq_sb);
int ret;
down_write(&dqopt->dqio_sem);
ret = qtree_release_dquot(sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv, dquot);
up_write(&dqopt->dqio_sem);
return ret;
}
static int v2_free_file_info(struct super_block *sb, int type)