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, 20 insertions, 3 deletions

diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index 2866b8c78b7a..6fe286a8e29b 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -316,7 +316,13 @@ xfs_growfs_data_private(
                         goto error0;
                 }
 
-                xfs_btree_init_block(mp, bp, XFS_ABTB_MAGIC, 0, 1, 0);
+                if (xfs_sb_version_hascrc(&mp->m_sb))
+                        xfs_btree_init_block(mp, bp, XFS_ABTB_CRC_MAGIC, 0, 1,
+                                                agno, XFS_BTREE_CRC_BLOCKS);
+                else
+                        xfs_btree_init_block(mp, bp, XFS_ABTB_MAGIC, 0, 1,
+                                                agno, 0);
+
                 arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
                 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
                 arec->ar_blockcount = cpu_to_be32(
@@ -339,7 +345,13 @@ xfs_growfs_data_private(
                         goto error0;
                 }
 
-                xfs_btree_init_block(mp, bp, XFS_ABTC_MAGIC, 0, 1, 0);
+                if (xfs_sb_version_hascrc(&mp->m_sb))
+                        xfs_btree_init_block(mp, bp, XFS_ABTC_CRC_MAGIC, 0, 1,
+                                                agno, XFS_BTREE_CRC_BLOCKS);
+                else
+                        xfs_btree_init_block(mp, bp, XFS_ABTC_MAGIC, 0, 1,
+                                                agno, 0);
+
                 arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
                 arec->ar_startblock = cpu_to_be32(XFS_PREALLOC_BLOCKS(mp));
                 arec->ar_blockcount = cpu_to_be32(
@@ -363,7 +375,12 @@ xfs_growfs_data_private(
                         goto error0;
                 }
 
-                xfs_btree_init_block(mp, bp, XFS_IBT_MAGIC, 0, 0, 0);
+                if (xfs_sb_version_hascrc(&mp->m_sb))
+                        xfs_btree_init_block(mp, bp, XFS_IBT_CRC_MAGIC, 0, 0,
+                                                agno, XFS_BTREE_CRC_BLOCKS);
+                else
+                        xfs_btree_init_block(mp, bp, XFS_IBT_MAGIC, 0, 0,
+                                                agno, 0);
 
                 error = xfs_bwrite(bp);
                 xfs_buf_relse(bp);