xfs: add CRC checks to the AGI

Same set of changes made to the AGF need to be made to the AGI.
This patch has a similar history to the AGF, hence a similar
sign-off chain.

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

1 files changed, 8 insertions, 0 deletions

diff --git a/fs/xfs/xfs_ag.h b/fs/xfs/xfs_ag.h
index 272ef097e2be..317aa86d96ea 100644
--- a/fs/xfs/xfs_ag.h
+++ b/fs/xfs/xfs_ag.h
@@ -152,6 +152,7 @@ typedef struct xfs_agi {
         __be32          agi_root;       /* root of inode btree */
         __be32          agi_level;      /* levels in inode btree */
         __be32          agi_freecount;  /* number of free inodes */
+
         __be32          agi_newino;     /* new inode just allocated */
         __be32          agi_dirino;     /* last directory inode chunk */
         /*
@@ -159,6 +160,13 @@ typedef struct xfs_agi {
          * still being referenced.
          */
         __be32          agi_unlinked[XFS_AGI_UNLINKED_BUCKETS];
+
+        uuid_t          agi_uuid;       /* uuid of filesystem */
+        __be32          agi_crc;        /* crc of agi sector */
+        __be32          agi_pad32;
+        __be64          agi_lsn;        /* last write sequence */
+
+        /* structure must be padded to 64 bit alignment */
 } xfs_agi_t;
 
 #define XFS_AGI_MAGICNUM        0x00000001