1 files changed, 65 insertions, 0 deletions

diff --git a/fs/xfs/libxfs/xfs_alloc_btree.h b/fs/xfs/libxfs/xfs_alloc_btree.h
new file mode 100644
index 000000000000..45e189e7e81c
--- /dev/null
+++ b/fs/xfs/libxfs/xfs_alloc_btree.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2000,2005 Silicon Graphics, Inc.
+ * All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+#ifndef __XFS_ALLOC_BTREE_H__
+#define __XFS_ALLOC_BTREE_H__
+
+/*
+ * Freespace on-disk structures
+ */
+
+struct xfs_buf;
+struct xfs_btree_cur;
+struct xfs_mount;
+
+/*
+ * Btree block header size depends on a superblock flag.
+ */
+#define XFS_ALLOC_BLOCK_LEN(mp) \
+        (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
+                XFS_BTREE_SBLOCK_CRC_LEN : XFS_BTREE_SBLOCK_LEN)
+
+/*
+ * Record, key, and pointer address macros for btree blocks.
+ *
+ * (note that some of these may appear unused, but they are used in userspace)
+ */
+#define XFS_ALLOC_REC_ADDR(mp, block, index) \
+        ((xfs_alloc_rec_t *) \
+                ((char *)(block) + \
+                 XFS_ALLOC_BLOCK_LEN(mp) + \
+                 (((index) - 1) * sizeof(xfs_alloc_rec_t))))
+
+#define XFS_ALLOC_KEY_ADDR(mp, block, index) \
+        ((xfs_alloc_key_t *) \
+                ((char *)(block) + \
+                 XFS_ALLOC_BLOCK_LEN(mp) + \
+                 ((index) - 1) * sizeof(xfs_alloc_key_t)))
+
+#define XFS_ALLOC_PTR_ADDR(mp, block, index, maxrecs) \
+        ((xfs_alloc_ptr_t *) \
+                ((char *)(block) + \
+                 XFS_ALLOC_BLOCK_LEN(mp) + \
+                 (maxrecs) * sizeof(xfs_alloc_key_t) + \
+                 ((index) - 1) * sizeof(xfs_alloc_ptr_t)))
+
+extern struct xfs_btree_cur *xfs_allocbt_init_cursor(struct xfs_mount *,
+                struct xfs_trans *, struct xfs_buf *,
+                xfs_agnumber_t, xfs_btnum_t);
+extern int xfs_allocbt_maxrecs(struct xfs_mount *, int, int);
+
+#endif  /* __XFS_ALLOC_BTREE_H__ */