]>
Commit | Line | Data |
---|---|---|
d8079fe0 DW |
1 | /* |
2 | * Copyright (C) 2016 Oracle. All Rights Reserved. | |
3 | * | |
4 | * Author: Darrick J. Wong <darrick.wong@oracle.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version 2 | |
9 | * of the License, or (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it would be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write the Free Software Foundation, | |
18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. | |
19 | */ | |
20 | #ifndef __XFS_REFCOUNT_BTREE_H__ | |
21 | #define __XFS_REFCOUNT_BTREE_H__ | |
22 | ||
23 | /* | |
24 | * Reference Count Btree on-disk structures | |
25 | */ | |
26 | ||
27 | struct xfs_buf; | |
28 | struct xfs_btree_cur; | |
29 | struct xfs_mount; | |
30 | ||
31 | /* | |
32 | * Btree block header size | |
33 | */ | |
34 | #define XFS_REFCOUNT_BLOCK_LEN XFS_BTREE_SBLOCK_CRC_LEN | |
35 | ||
36 | /* | |
37 | * Record, key, and pointer address macros for btree blocks. | |
38 | * | |
39 | * (note that some of these may appear unused, but they are used in userspace) | |
40 | */ | |
41 | #define XFS_REFCOUNT_REC_ADDR(block, index) \ | |
42 | ((struct xfs_refcount_rec *) \ | |
43 | ((char *)(block) + \ | |
44 | XFS_REFCOUNT_BLOCK_LEN + \ | |
45 | (((index) - 1) * sizeof(struct xfs_refcount_rec)))) | |
46 | ||
47 | #define XFS_REFCOUNT_KEY_ADDR(block, index) \ | |
48 | ((struct xfs_refcount_key *) \ | |
49 | ((char *)(block) + \ | |
50 | XFS_REFCOUNT_BLOCK_LEN + \ | |
51 | ((index) - 1) * sizeof(struct xfs_refcount_key))) | |
52 | ||
53 | #define XFS_REFCOUNT_PTR_ADDR(block, index, maxrecs) \ | |
54 | ((xfs_refcount_ptr_t *) \ | |
55 | ((char *)(block) + \ | |
56 | XFS_REFCOUNT_BLOCK_LEN + \ | |
57 | (maxrecs) * sizeof(struct xfs_refcount_key) + \ | |
58 | ((index) - 1) * sizeof(xfs_refcount_ptr_t))) | |
59 | ||
60 | extern struct xfs_btree_cur *xfs_refcountbt_init_cursor(struct xfs_mount *mp, | |
61 | struct xfs_trans *tp, struct xfs_buf *agbp, xfs_agnumber_t agno, | |
62 | struct xfs_defer_ops *dfops); | |
1421de38 | 63 | extern int xfs_refcountbt_maxrecs(int blocklen, bool leaf); |
d8079fe0 DW |
64 | extern void xfs_refcountbt_compute_maxlevels(struct xfs_mount *mp); |
65 | ||
02cc8b2a DW |
66 | extern xfs_extlen_t xfs_refcountbt_calc_size(struct xfs_mount *mp, |
67 | unsigned long long len); | |
f21c57ed DW |
68 | extern xfs_extlen_t xfs_refcountbt_max_size(struct xfs_mount *mp, |
69 | xfs_agblock_t agblocks); | |
02cc8b2a DW |
70 | |
71 | extern int xfs_refcountbt_calc_reserves(struct xfs_mount *mp, | |
72 | xfs_agnumber_t agno, xfs_extlen_t *ask, xfs_extlen_t *used); | |
73 | ||
d8079fe0 | 74 | #endif /* __XFS_REFCOUNT_BTREE_H__ */ |