diff options
| author | Christoph Hellwig <hch@infradead.org> | 2008-10-30 16:54:12 +1100 |
|---|---|---|
| committer | Lachlan McIlroy <lachlan@sgi.com> | 2008-10-30 16:54:12 +1100 |
| commit | de227dd9604934d2a6d33cd332d1be431719c93e (patch) | |
| tree | 36254901d67015aa2f2621bea47f8082c31c8e55 | |
| parent | 561f7d17390d00444e6cd0b02b7516c91528082e (diff) | |
[XFS] add generic btree types
Add generic union types for btree pointers, keys and records. The generic
btree pointer contains either a 32 and 64bit big endian scalar for short
and long form btrees, and the key and record contain the relevant type for
each possible btree.
Split out from a bigger patch from Dave Chinner and simplified a little
further.
SGI-PV: 985583
SGI-Modid: xfs-linux-melb:xfs-kern:32178a
Signed-off-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Bill O'Donnell <billodo@sgi.com>
Signed-off-by: David Chinner <david@fromorbit.com>
| -rw-r--r-- | fs/xfs/xfs_btree.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/fs/xfs/xfs_btree.h b/fs/xfs/xfs_btree.h index d30ee749860..428e81f0e27 100644 --- a/fs/xfs/xfs_btree.h +++ b/fs/xfs/xfs_btree.h @@ -80,6 +80,31 @@ typedef struct xfs_btree_block { } xfs_btree_block_t; /* + * Generic key, ptr and record wrapper structures. + * + * These are disk format structures, and are converted where necessary + * by the btree specific code that needs to interpret them. + */ +union xfs_btree_ptr { + __be32 s; /* short form ptr */ + __be64 l; /* long form ptr */ +}; + +union xfs_btree_key { + xfs_bmbt_key_t bmbt; + xfs_bmdr_key_t bmbr; /* bmbt root block */ + xfs_alloc_key_t alloc; + xfs_inobt_key_t inobt; +}; + +union xfs_btree_rec { + xfs_bmbt_rec_t bmbt; + xfs_bmdr_rec_t bmbr; /* bmbt root block */ + xfs_alloc_rec_t alloc; + xfs_inobt_rec_t inobt; +}; + +/* * For logging record fields. */ #define XFS_BB_MAGIC 0x01 |