| Darrick J. Wong | 1946b91 | 2016-10-03 09:11:18 -0700 | [diff] [blame] | 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); |
| 63 | extern int xfs_refcountbt_maxrecs(struct xfs_mount *mp, int blocklen, |
| 64 | bool leaf); |
| 65 | extern void xfs_refcountbt_compute_maxlevels(struct xfs_mount *mp); |
| 66 | |
| Darrick J. Wong | 84d6961 | 2016-10-03 09:11:44 -0700 | [diff] [blame] | 67 | extern xfs_extlen_t xfs_refcountbt_calc_size(struct xfs_mount *mp, |
| 68 | unsigned long long len); |
| Darrick J. Wong | b96e4e8 | 2017-01-09 16:39:01 +0100 | [diff] [blame] | 69 | extern xfs_extlen_t xfs_refcountbt_max_size(struct xfs_mount *mp, |
| 70 | xfs_agblock_t agblocks); |
| Darrick J. Wong | 84d6961 | 2016-10-03 09:11:44 -0700 | [diff] [blame] | 71 | |
| 72 | extern int xfs_refcountbt_calc_reserves(struct xfs_mount *mp, |
| 73 | xfs_agnumber_t agno, xfs_extlen_t *ask, xfs_extlen_t *used); |
| 74 | |
| Darrick J. Wong | 1946b91 | 2016-10-03 09:11:18 -0700 | [diff] [blame] | 75 | #endif /* __XFS_REFCOUNT_BTREE_H__ */ |