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| author |   Christoph Hellwig <hch@infradead.org> | 2008-10-30 16:55:34 +1100 |
|---|---|---|
| committer |   Lachlan McIlroy <lachlan@sgi.com> | 2008-10-30 16:55:34 +1100 |
| commit | 65f1eaeac0efc968797f3ac955b85ba3f5d4f9c8 (patch) | |
| tree | 149c010e3a1d4abb60021ed39d3972459f63d13d /fs/xfs/xfs_alloc_btree.c | |
| parent | [XFS] add get_maxrecs btree operation (diff) | |
| download | linux-dev-65f1eaeac0efc968797f3ac955b85ba3f5d4f9c8.tar.xz linux-dev-65f1eaeac0efc968797f3ac955b85ba3f5d4f9c8.zip | |
[XFS] add helpers for addressing entities inside a btree block
Add new helpers in xfs_btree.c to find the record, key and block pointer
entries inside a btree block. To implement this genericly the
->get_maxrecs methods and two new xfs_btree_ops entries for the key and
record sizes are used. Also add a big comment describing how the
addressing inside a btree block works.
Note that these helpers are unused until users are introduced in the next
patches and this patch will thus cause some harmless compiler warnings.
SGI-PV: 985583
SGI-Modid: xfs-linux-melb:xfs-kern:32189a
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>
Diffstat (limited to 'fs/xfs/xfs_alloc_btree.c')
| -rw-r--r-- | fs/xfs/xfs_alloc_btree.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/xfs/xfs_alloc_btree.c b/fs/xfs/xfs_alloc_btree.c index 1f268b6f4362..9e2421c31a36 100644 --- a/fs/xfs/xfs_alloc_btree.c +++ b/fs/xfs/xfs_alloc_btree.c @@ -2294,6 +2294,9 @@ xfs_allocbt_trace_record( #endif /* XFS_BTREE_TRACE */ static const struct xfs_btree_ops xfs_allocbt_ops = { + .rec_len = sizeof(xfs_alloc_rec_t), + .key_len = sizeof(xfs_alloc_key_t), + .dup_cursor = xfs_allocbt_dup_cursor, .get_maxrecs = xfs_allocbt_get_maxrecs, |