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, 30 insertions, 1 deletions

diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c
index 226fe21f2608..78755766c329 100644
--- a/fs/ocfs2/suballoc.c
+++ b/fs/ocfs2/suballoc.c
@@ -35,6 +35,7 @@
 #include "ocfs2.h"
 
 #include "alloc.h"
+#include "blockcheck.h"
 #include "dlmglue.h"
 #include "inode.h"
 #include "journal.h"
@@ -250,8 +251,18 @@ int ocfs2_check_group_descriptor(struct super_block *sb,
                                  struct buffer_head *bh)
 {
         int rc;
+        struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data;
+
+        BUG_ON(!buffer_uptodate(bh));
 
-        rc = ocfs2_validate_gd_self(sb, bh, 1);
+        /*
+         * 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, &gd->bg_check);
+        if (!rc)
+                rc = ocfs2_validate_gd_self(sb, bh, 1);
         if (!rc)
                 rc = ocfs2_validate_gd_parent(sb, di, bh, 1);
 
@@ -261,9 +272,27 @@ int ocfs2_check_group_descriptor(struct super_block *sb,
 static int ocfs2_validate_group_descriptor(struct super_block *sb,
                                            struct buffer_head *bh)
 {
+        int rc;
+        struct ocfs2_group_desc *gd = (struct ocfs2_group_desc *)bh->b_data;
+
         mlog(0, "Validating group descriptor %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, &gd->bg_check);
+        if (rc)
+                return rc;
+
+        /*
+         * Errors after here are fatal.
+         */
+
         return ocfs2_validate_gd_self(sb, bh, 0);
 }