diff options
| author | Jan Kara <jack@suse.cz> | 2010-05-13 22:14:53 +0200 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2010-05-21 19:30:48 +0200 |
| commit | c06bcbfa1ed8daaeb2a262f372b411207891e229 (patch) | |
| tree | db734e409643108ea4b5df28bf18bcfac654eaca /fs | |
| parent | ocfs2: Use __dquot_transfer to avoid lock inversion (diff) | |
| download | linux-c06bcbfa1ed8daaeb2a262f372b411207891e229.tar.xz linux-c06bcbfa1ed8daaeb2a262f372b411207891e229.zip | |
ocfs2: Fix lock inversion in quotas during umount
We cannot cancel delayed work from ocfs2_local_free_info because that is called
with dqonoff_mutex held and the work it cancels requires dqonoff_mutex to
finish. Cancel the work before acquiring dqonoff_mutex.
Acked-by: Joel Becker <Joel.Becker@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ocfs2/quota_local.c | 4 | ||||
| -rw-r--r-- | fs/ocfs2/super.c | 4 |
2 files changed, 4 insertions, 4 deletions
diff --git a/fs/ocfs2/quota_local.c b/fs/ocfs2/quota_local.c index 551a6bff9f2c..8bd70d4d184d 100644 --- a/fs/ocfs2/quota_local.c +++ b/fs/ocfs2/quota_local.c @@ -816,10 +816,6 @@ static int ocfs2_local_free_info(struct super_block *sb, int type) int mark_clean = 1, len; int status; - /* At this point we know there are no more dquots and thus - * even if there's some sync in the pdflush queue, it won't - * find any dquots and return without doing anything */ - cancel_delayed_work_sync(&oinfo->dqi_sync_work); iput(oinfo->dqi_gqinode); ocfs2_simple_drop_lockres(OCFS2_SB(sb), &oinfo->dqi_gqlock); ocfs2_lock_res_free(&oinfo->dqi_gqlock); diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c index 1c2c39f6f0b6..2c26ce251cb3 100644 --- a/fs/ocfs2/super.c +++ b/fs/ocfs2/super.c @@ -938,12 +938,16 @@ static void ocfs2_disable_quotas(struct ocfs2_super *osb) int type; struct inode *inode; struct super_block *sb = osb->sb; + struct ocfs2_mem_dqinfo *oinfo; /* We mostly ignore errors in this function because there's not much * we can do when we see them */ for (type = 0; type < MAXQUOTAS; type++) { if (!sb_has_quota_loaded(sb, type)) continue; + /* Cancel periodic syncing before we grab dqonoff_mutex */ + oinfo = sb_dqinfo(sb, type)->dqi_priv; + cancel_delayed_work_sync(&oinfo->dqi_sync_work); inode = igrab(sb->s_dquot.files[type]); /* Turn off quotas. This will remove all dquot structures from * memory and so they will be automatically synced to global |