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Commit 17e8a893 authored by Jan Kara's avatar Jan Kara
Browse files

quota: Handle Q_GETNEXTQUOTA when quota is disabled 



Currently we oopsed when Q_GETNEXTQUOTA got called when quota was
disabled. Properly check whether quota is enabled for the filesystem
before calling into quota format handler.

Reported-by: default avatarTed Tso <tytso@mit.edu>
Signed-off-by: default avatarJan Kara <jack@suse.cz>
parent 1993b176

fs/quota/dquot.c

+11 −2
Original line number Diff line number Diff line
@@ -2047,11 +2047,20 @@ int dquot_get_next_id(struct super_block *sb, struct kqid *qid) 
	struct quota_info *dqopt = sb_dqopt(sb);

	int err;



	if (!dqopt->ops[qid->type]->get_next_id)

		return -ENOSYS;

	mutex_lock(&dqopt->dqonoff_mutex);

	if (!sb_has_quota_active(sb, qid->type)) {

		err = -ESRCH;

		goto out;

	}

	if (!dqopt->ops[qid->type]->get_next_id) {

		err = -ENOSYS;

		goto out;

	}

	mutex_lock(&dqopt->dqio_mutex);

	err = dqopt->ops[qid->type]->get_next_id(sb, qid);

	mutex_unlock(&dqopt->dqio_mutex);

out:

	mutex_unlock(&dqopt->dqonoff_mutex);



	return err;

}