ocfs2: block read meta ecc.

Add block check calls to the read_block validate functions.  This is the
almost all of the read-side checking of metaecc.  xattr buckets are not checked
yet.   Writes are also unchecked, and so a read-write mount will quickly fail.

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

1 files changed, 11 insertions, 2 deletions

diff --git a/fs/ocfs2/quota_global.c b/fs/ocfs2/quota_global.c
index 7dbcfd7f65e6..a0b8b14cca8f 100644
--- a/fs/ocfs2/quota_global.c
+++ b/fs/ocfs2/quota_global.c
@@ -16,6 +16,7 @@
 #include "ocfs2_fs.h"
 #include "ocfs2.h"
 #include "alloc.h"
+#include "blockcheck.h"
 #include "inode.h"
 #include "journal.h"
 #include "file.h"
@@ -90,12 +91,20 @@ struct qtree_fmt_operations ocfs2_global_ops = {
 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);
+        struct ocfs2_disk_dqtrailer *dqt =
+                ocfs2_block_dqtrailer(sb->s_blocksize, bh->b_data);
 
         mlog(0, "Validating quota block %llu\n",
              (unsigned long long)bh->b_blocknr);
 
-        return 0;
+        BUG_ON(!buffer_uptodate(bh));
+
+        /*
+         * If the ecc fails, we return the error but otherwise
+         * leave the filesystem running.  We know any error is
+         * local to this block.
+         */
+        return ocfs2_validate_meta_ecc(sb, bh->b_data, &dqt->dq_check);
 }
 
 int ocfs2_read_quota_block(struct inode *inode, u64 v_block,