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| author |   Jan Kara <jack@suse.cz> | 2017-06-08 15:05:08 +0200 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2017-08-17 18:58:44 +0200 |
| commit | 0cff9151d3fa27574c2201377a080e1b9b87b8ba (patch) | |
| tree | 47e6eeb87319a8908488e53894ed2469a0f0241b /fs/quota | |
| parent | quota: Do more fine-grained locking in dquot_acquire() (diff) | |
| download | linux-dev-0cff9151d3fa27574c2201377a080e1b9b87b8ba.tar.xz linux-dev-0cff9151d3fa27574c2201377a080e1b9b87b8ba.zip | |
quota: Acquire dqio_sem for reading in dquot_get_next_id()
dquot_get_next_id() needs dqio_sem only for reading to protect against
racing with modification of quota file structure.
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/quota')
| -rw-r--r-- | fs/quota/dquot.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c index 21358f31923d..8d5ccad3bf3e 100644 --- a/fs/quota/dquot.c +++ b/fs/quota/dquot.c @@ -2079,9 +2079,9 @@ int dquot_get_next_id(struct super_block *sb, struct kqid *qid) return -ESRCH; if (!dqopt->ops[qid->type]->get_next_id) return -ENOSYS; - down_write(&dqopt->dqio_sem); + down_read(&dqopt->dqio_sem); err = dqopt->ops[qid->type]->get_next_id(sb, qid); - up_write(&dqopt->dqio_sem); + up_read(&dqopt->dqio_sem); return err; } EXPORT_SYMBOL(dquot_get_next_id); |