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>

1 files changed, 10 insertions, 1 deletions

diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 2a618dd2577d..973a636285d1 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -772,10 +772,17 @@ static ssize_t ocfs2_direct_IO_write(struct kiocb *iocb,
                 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 @@ static ssize_t ocfs2_direct_IO_write(struct kiocb *iocb,
 
                 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: