xfs: dump the first 128 bytes of any corrupt buffer

Increase the corrupt buffer dump to the first 128 bytes since v5
filesystems have larger block headers than before.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>

fs/xfs/xfs_buf.c

@@ -1381,7 +1381,8 @@ _xfs_buf_ioapply(
 				xfs_warn(mp,
 					"%s: no ops on block 0x%llx/0x%x",
 					__func__, bp->b_bn, bp->b_length);
-				xfs_hex_dump(bp->b_addr, 64);
+				xfs_hex_dump(bp->b_addr,
+						XFS_CORRUPTION_DUMP_LEN);
 				dump_stack();
 			}
 		}

fs/xfs/xfs_error.c

@@ -336,7 +336,7 @@ xfs_corruption_error(
 	xfs_failaddr_t		failaddr)
 {
 	if (level <= xfs_error_level)
-		xfs_hex_dump(p, 64);
+		xfs_hex_dump(p, XFS_CORRUPTION_DUMP_LEN);
 	xfs_error_report(tag, level, mp, filename, linenum, failaddr);
 	xfs_alert(mp, "Corruption detected. Unmount and run xfs_repair");
 }
@@ -364,8 +364,9 @@ xfs_verifier_error(
 	xfs_alert(mp, "Unmount and run xfs_repair");
 
 	if (xfs_error_level >= XFS_ERRLEVEL_LOW) {
-		xfs_alert(mp, "First 64 bytes of corrupted metadata buffer:");
+		xfs_alert(mp, "First %d bytes of corrupted metadata buffer:",
-		xfs_hex_dump(xfs_buf_offset(bp, 0), 64);
+				XFS_CORRUPTION_DUMP_LEN);
+		xfs_hex_dump(xfs_buf_offset(bp, 0), XFS_CORRUPTION_DUMP_LEN);
 	}
 
 	if (xfs_error_level >= XFS_ERRLEVEL_HIGH)

fs/xfs/xfs_error.h

@@ -39,6 +39,9 @@ extern void xfs_verifier_error(struct xfs_buf *bp, int error,
 #define XFS_ERRLEVEL_LOW	1
 #define XFS_ERRLEVEL_HIGH	5
 
+/* Dump 128 bytes of any corrupt buffer */
+#define XFS_CORRUPTION_DUMP_LEN		(128)
+
 /*
  * Macros to set EFSCORRUPTED & return/branch.
  */