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>
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index 84a7bd4..6b27f74 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -37,6 +37,7 @@
#include "alloc.h"
#include "aops.h"
+#include "blockcheck.h"
#include "dlmglue.h"
#include "extent_map.h"
#include "inode.h"
@@ -682,12 +683,28 @@
static int ocfs2_validate_extent_block(struct super_block *sb,
struct buffer_head *bh)
{
+ int rc;
struct ocfs2_extent_block *eb =
(struct ocfs2_extent_block *)bh->b_data;
mlog(0, "Validating extent block %llu\n",
(unsigned long long)bh->b_blocknr);
+ 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.
+ */
+ rc = ocfs2_validate_meta_ecc(sb, bh->b_data, &eb->h_check);
+ if (rc)
+ return rc;
+
+ /*
+ * Errors after here are fatal.
+ */
+
if (!OCFS2_IS_VALID_EXTENT_BLOCK(eb)) {
ocfs2_error(sb,
"Extent block #%llu has bad signature %.*s",
