xfs: add support for large btree blocks

Add support for larger btree blocks that contains a CRC32C checksum,
a filesystem uuid and block number for detecting filesystem
consistency and out of place writes.

[dchinner@redhat.com] Also include an owner field to allow reverse
mappings to be implemented for improved repairability and a LSN
field to so that log recovery can easily determine the last
modification that made it to disk for each buffer.

[dchinner@redhat.com] Add buffer log format flags to indicate the
type of buffer to recovery so that we don't have to do blind magic
number tests to determine what the buffer is.

[dchinner@redhat.com] Modified to fit into the verifier structure.

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, 28 insertions, 0 deletions

diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 3ca3380c3afe..3762ce2e99fc 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -29,6 +29,7 @@
 #include "xfs_bmap_btree.h"
 #include "xfs_alloc_btree.h"
 #include "xfs_ialloc_btree.h"
+#include "xfs_btree.h"
 #include "xfs_dinode.h"
 #include "xfs_inode.h"
 #include "xfs_inode_item.h"
@@ -1928,6 +1929,33 @@ xlog_recover_do_reg_buffer(
 
         /* Shouldn't be any more regions */
         ASSERT(i == item->ri_total);
+
+        switch (buf_f->blf_flags & XFS_BLF_TYPE_MASK) {
+        case XFS_BLF_BTREE_BUF:
+                switch (be32_to_cpu(*(__be32 *)bp->b_addr)) {
+                case XFS_ABTB_CRC_MAGIC:
+                case XFS_ABTC_CRC_MAGIC:
+                case XFS_ABTB_MAGIC:
+                case XFS_ABTC_MAGIC:
+                        bp->b_ops = &xfs_allocbt_buf_ops;
+                        break;
+                case XFS_IBT_CRC_MAGIC:
+                case XFS_IBT_MAGIC:
+                        bp->b_ops = &xfs_inobt_buf_ops;
+                        break;
+                case XFS_BMAP_CRC_MAGIC:
+                case XFS_BMAP_MAGIC:
+                        bp->b_ops = &xfs_bmbt_buf_ops;
+                        break;
+                default:
+                        xfs_warn(mp, "Bad btree block magic!");
+                        ASSERT(0);
+                        break;
+                }
+                break;
+        default:
+                break;
+        }
 }
 
 /*