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, 9 insertions, 0 deletions

diff --git a/fs/ocfs2/blockcheck.c b/fs/ocfs2/blockcheck.c
index 2bf3d7f61aec..2ce6ae5e4b8c 100644
--- a/fs/ocfs2/blockcheck.c
+++ b/fs/ocfs2/blockcheck.c
@@ -24,6 +24,8 @@
 #include <linux/bitops.h>
 #include <asm/byteorder.h>
 
+#include <cluster/masklog.h>
+
 #include "ocfs2.h"
 
 #include "blockcheck.h"
@@ -292,6 +294,10 @@ int ocfs2_block_check_validate(void *data, size_t blocksize,
         if (crc == check.bc_crc32e)
                 goto out;
 
+        mlog(ML_ERROR,
+             "CRC32 failed: stored: %u, computed %u.  Applying ECC.\n",
+             (unsigned int)check.bc_crc32e, (unsigned int)crc);
+
         /* Ok, try ECC fixups */
         ecc = ocfs2_hamming_encode_block(data, blocksize);
         ocfs2_hamming_fix_block(data, blocksize, ecc ^ check.bc_ecc);
@@ -301,6 +307,9 @@ int ocfs2_block_check_validate(void *data, size_t blocksize,
         if (crc == check.bc_crc32e)
                 goto out;
 
+        mlog(ML_ERROR, "Fixed CRC32 failed: stored: %u, computed %u\n",
+             (unsigned int)check.bc_crc32e, (unsigned int)crc);
+
         rc = -EIO;
 
 out: