ocfs2: take inode lock when get clusters
We need take inode lock when calling ocfs2_get_clusters.
And use GFP_NOFS instead of GFP_KERNEL.
Signed-off-by: Joseph Qi <joseph.qi@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 2a618dd..973a636 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -772,10 +772,17 @@
u32 p_cpos = 0;
u32 v_cpos = ocfs2_bytes_to_clusters(osb->sb, offset);
+ ret = ocfs2_inode_lock(inode, NULL, 0);
+ if (ret < 0) {
+ mlog_errno(ret);
+ goto clean_orphan;
+ }
+
ret = ocfs2_get_clusters(inode, v_cpos, &p_cpos,
&num_clusters, &ext_flags);
if (ret < 0) {
mlog_errno(ret);
+ ocfs2_inode_unlock(inode, 0);
goto clean_orphan;
}
@@ -783,9 +790,11 @@
ret = blkdev_issue_zeroout(osb->sb->s_bdev,
p_cpos << (osb->s_clustersize_bits - 9),
- zero_len >> 9, GFP_KERNEL, false);
+ zero_len >> 9, GFP_NOFS, false);
if (ret < 0)
mlog_errno(ret);
+
+ ocfs2_inode_unlock(inode, 0);
}
clean_orphan: