summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorRyan Ding <ryan.ding@oracle.com>2016-03-25 14:21:23 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-25 16:37:42 -0700
commit28888681b4f641ce9a96478ce4683577cd3abbff (patch)
tree48f10b475c7f9b9fc96957e88928f163ee6012f8
parentce170828e24959c69e7a40364731edc0535c550f (diff)
downloadlinux-sh-28888681b4f641ce9a96478ce4683577cd3abbff.tar.gz
ocfs2: fix a deadlock issue in ocfs2_dio_end_io_write()
The code should call ocfs2_free_alloc_context() to free meta_ac & data_ac before calling ocfs2_run_deallocs(). Because ocfs2_run_deallocs() will acquire the system inode's i_mutex hold by meta_ac. So try to release the lock before ocfs2_run_deallocs(). Fixes: af1310367f41 ("ocfs2: fix sparse file & data ordering issue in direct io.") Signed-off-by: Ryan Ding <ryan.ding@oracle.com> Acked-by: Junxiao Bi <junxiao.bi@oracle.com> Cc: Joseph Qi <joseph.qi@huawei.com> Cc: Mark Fasheh <mfasheh@suse.de> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/ocfs2/aops.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 328ac7f99d52..1581240a7ca0 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -2341,6 +2341,10 @@ static void ocfs2_dio_end_io_write(struct inode *inode,
ret = ocfs2_lock_allocators(inode, &et, 0, dwc->dw_zero_count*2,
&data_ac, &meta_ac);
+ if (ret) {
+ mlog_errno(ret);
+ goto unlock;
+ }
credits = ocfs2_calc_extend_credits(inode->i_sb, &di->id2.i_list);
@@ -2380,14 +2384,14 @@ unlock:
ocfs2_inode_unlock(inode, 1);
brelse(di_bh);
out:
- ocfs2_run_deallocs(osb, &dealloc);
- if (locked)
- mutex_unlock(&inode->i_mutex);
- ocfs2_dio_free_write_ctx(inode, dwc);
if (data_ac)
ocfs2_free_alloc_context(data_ac);
if (meta_ac)
ocfs2_free_alloc_context(meta_ac);
+ ocfs2_run_deallocs(osb, &dealloc);
+ if (locked)
+ mutex_unlock(&inode->i_mutex);
+ ocfs2_dio_free_write_ctx(inode, dwc);
}
/*