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quota: Push dqio_sem down to ->read_dqblk()

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Push down acquisition of dqio_sem into ->read_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 15:30:45 +02:00
parent 5e8cb9b624
commit e342e38df9
3 changed files with 14 additions and 6 deletions
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10
fs/quota/quota_v2.c
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@@ -285,7 +285,15 @@ static int v2r1_is_id(void *dp, struct dquot *dquot)
static int v2_read_dquot(struct dquot *dquot)
{
return qtree_read_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_read(&dqopt->dqio_sem);
ret = qtree_read_dquot(
sb_dqinfo(dquot->dq_sb, dquot->dq_id.type)->dqi_priv,
dquot);
up_read(&dqopt->dqio_sem);
return ret;
}
static int v2_write_dquot(struct dquot *dquot)