ocfs2: Add a validation hook for quota block reads.

Add a currently-returns-success hook for quota block reads.  We'll be
adding checks to this.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>

1 files changed, 13 insertions, 1 deletions

diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c
index a10faebe88a1..7dbcfd7f65e6 100644
--- a/fs/ocfs2/quota_global.c
+++ b/fs/ocfs2/quota_global.c
@@ -87,13 +87,25 @@ struct qtree_fmt_operations ocfs2_global_ops = {
         .is_id = ocfs2_global_is_id,
 };
 
+static int ocfs2_validate_quota_block(struct super_block *sb,
+                                      struct buffer_head *bh)
+{
+        struct ocfs2_disk_dqtrailer *dqt = ocfs2_dq_trailer(sb, bh->b_data);
+
+        mlog(0, "Validating quota block %llu\n",
+             (unsigned long long)bh->b_blocknr);
+
+        return 0;
+}
+
 int ocfs2_read_quota_block(struct inode *inode, u64 v_block,
                            struct buffer_head **bh)
 {
         int rc = 0;
         struct buffer_head *tmp = *bh;
 
-        rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0, NULL);
+        rc = ocfs2_read_virt_blocks(inode, v_block, 1, &tmp, 0,
+                                    ocfs2_validate_quota_block);
         if (rc)
                 mlog_errno(rc);