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authorChristoph Hellwig <hch@lst.de>2013-04-21 14:53:46 -0500
committerBen Myers <bpm@sgi.com>2013-04-21 14:53:46 -0500
commitee1a47ab0e77600fcbdf1c87d461bd8f3f63150d (patch)
tree6340d9f4b8b53c0d18045da1372599645375efce /fs/xfs/xfs_bmap_btree.h
parenta2050646f655a90400cbb66c3866d2e0137eee0c (diff)
downloadlinux-ee1a47ab0e77600fcbdf1c87d461bd8f3f63150d.tar.bz2
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>
Diffstat (limited to 'fs/xfs/xfs_bmap_btree.h')
-rw-r--r--fs/xfs/xfs_bmap_btree.h19
1 files changed, 10 insertions, 9 deletions
diff --git a/fs/xfs/xfs_bmap_btree.h b/fs/xfs/xfs_bmap_btree.h
index 88469ca08696..70c43d9f72c1 100644
--- a/fs/xfs/xfs_bmap_btree.h
+++ b/fs/xfs/xfs_bmap_btree.h
@@ -18,7 +18,8 @@
#ifndef __XFS_BMAP_BTREE_H__
#define __XFS_BMAP_BTREE_H__
-#define XFS_BMAP_MAGIC 0x424d4150 /* 'BMAP' */
+#define XFS_BMAP_MAGIC 0x424d4150 /* 'BMAP' */
+#define XFS_BMAP_CRC_MAGIC 0x424d4133 /* 'BMA3' */
struct xfs_btree_cur;
struct xfs_btree_block;
@@ -136,10 +137,10 @@ typedef __be64 xfs_bmbt_ptr_t, xfs_bmdr_ptr_t;
/*
* Btree block header size depends on a superblock flag.
- *
- * (not quite yet, but soon)
*/
-#define XFS_BMBT_BLOCK_LEN(mp) XFS_BTREE_LBLOCK_LEN
+#define XFS_BMBT_BLOCK_LEN(mp) \
+ (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
+ XFS_BTREE_LBLOCK_CRC_LEN : XFS_BTREE_LBLOCK_LEN)
#define XFS_BMBT_REC_ADDR(mp, block, index) \
((xfs_bmbt_rec_t *) \
@@ -186,12 +187,12 @@ typedef __be64 xfs_bmbt_ptr_t, xfs_bmdr_ptr_t;
#define XFS_BMAP_BROOT_PTR_ADDR(mp, bb, i, sz) \
XFS_BMBT_PTR_ADDR(mp, bb, i, xfs_bmbt_maxrecs(mp, sz, 0))
-#define XFS_BMAP_BROOT_SPACE_CALC(nrecs) \
- (int)(XFS_BTREE_LBLOCK_LEN + \
+#define XFS_BMAP_BROOT_SPACE_CALC(mp, nrecs) \
+ (int)(XFS_BMBT_BLOCK_LEN(mp) + \
((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
-#define XFS_BMAP_BROOT_SPACE(bb) \
- (XFS_BMAP_BROOT_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs)))
+#define XFS_BMAP_BROOT_SPACE(mp, bb) \
+ (XFS_BMAP_BROOT_SPACE_CALC(mp, be16_to_cpu((bb)->bb_numrecs)))
#define XFS_BMDR_SPACE_CALC(nrecs) \
(int)(sizeof(xfs_bmdr_block_t) + \
((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
@@ -204,7 +205,7 @@ typedef __be64 xfs_bmbt_ptr_t, xfs_bmdr_ptr_t;
/*
* Prototypes for xfs_bmap.c to call.
*/
-extern void xfs_bmdr_to_bmbt(struct xfs_mount *, xfs_bmdr_block_t *, int,
+extern void xfs_bmdr_to_bmbt(struct xfs_inode *, xfs_bmdr_block_t *, int,
struct xfs_btree_block *, int);
extern void xfs_bmbt_get_all(xfs_bmbt_rec_host_t *r, xfs_bmbt_irec_t *s);
extern xfs_filblks_t xfs_bmbt_get_blockcount(xfs_bmbt_rec_host_t *r);