xfs: add version 3 inode format with CRCs

Add a new inode version with a larger core.  The primary objective is
to allow for a crc of the inode, and location information (uuid and ino)
to verify it was written in the right place.  We also extend it by:

	a creation time (for Samba);
	a changecount (for NFSv4);
	a flush sequence (in LSN format for recovery);
	an additional inode flags field; and
	some additional padding.

These additional fields are not implemented yet, but already laid
out in the structure.

[dchinner@redhat.com] Added LSN and flags field, some factoring and rework to
capture all the necessary information in the crc calculation.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Ben Myers <bpm@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/fs/xfs/xfs_buf_item.h b/fs/xfs/xfs_buf_item.h
index c25660691e08..abae8c8c4ec4 100644
--- a/fs/xfs/xfs_buf_item.h
+++ b/fs/xfs/xfs_buf_item.h
@@ -48,6 +48,7 @@ extern kmem_zone_t	*xfs_buf_item_zone;
 #define XFS_BLF_AGF_BUF         (1<<6)
 #define XFS_BLF_AGFL_BUF        (1<<7)
 #define XFS_BLF_AGI_BUF         (1<<8)
+#define XFS_BLF_DINO_BUF        (1<<9)
 
 #define XFS_BLF_TYPE_MASK       \
                 (XFS_BLF_UDQUOT_BUF | \
@@ -56,7 +57,8 @@ extern kmem_zone_t	*xfs_buf_item_zone;
                  XFS_BLF_BTREE_BUF | \
                  XFS_BLF_AGF_BUF | \
                  XFS_BLF_AGFL_BUF | \
-                 XFS_BLF_AGI_BUF)
+                 XFS_BLF_AGI_BUF | \
+                 XFS_BLF_DINO_BUF)
 
 #define XFS_BLF_CHUNK           128
 #define XFS_BLF_SHIFT           7