From 65f1eaeac0efc968797f3ac955b85ba3f5d4f9c8 Mon Sep 17 00:00:00 2001 From: Christoph Hellwig Date: Thu, 30 Oct 2008 16:55:34 +1100 Subject: [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 Signed-off-by: Lachlan McIlroy Signed-off-by: Bill O'Donnell Signed-off-by: David Chinner --- fs/xfs/xfs_alloc_btree.c | 3 +++ 1 file changed, 3 insertions(+) (limited to 'fs/xfs/xfs_alloc_btree.c') 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, -- cgit v1.2.3-59-g8ed1b