projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 035e00ac DW |
1 | /* |
| 2 | * Copyright (c) 2014 Red Hat, Inc. | |
| 3 | * All Rights Reserved. | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or | |
| 6 | * modify it under the terms of the GNU General Public License as | |
| 7 | * published by the Free Software Foundation. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it would be useful, | |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | * GNU General Public License for more details. | |
| 13 | * | |
| 14 | * You should have received a copy of the GNU General Public License | |
| 15 | * along with this program; if not, write the Free Software Foundation, | |
| 16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
| 17 | */ | |
| 18 | #ifndef __XFS_RMAP_BTREE_H__ | |
| 19 | #define __XFS_RMAP_BTREE_H__ | |
| 20 | ||
| 21 | struct xfs_buf; | |
| 22 | struct xfs_btree_cur; | |
| 23 | struct xfs_mount; | |
| 24 | ||
| 25 | /* rmaps only exist on crc enabled filesystems */ | |
| 26 | #define XFS_RMAP_BLOCK_LEN XFS_BTREE_SBLOCK_CRC_LEN | |
| 27 | ||
| 28 | /* | |
| 29 | * Record, key, and pointer address macros for btree blocks. | |
| 30 | * | |
| 31 | * (note that some of these may appear unused, but they are used in userspace) | |
| 32 | */ | |
| 33 | #define XFS_RMAP_REC_ADDR(block, index) \ | |
| 34 | ((struct xfs_rmap_rec *) \ | |
| 35 | ((char *)(block) + XFS_RMAP_BLOCK_LEN + \ | |
| 36 | (((index) - 1) * sizeof(struct xfs_rmap_rec)))) | |
| 37 | ||
| 38 | #define XFS_RMAP_KEY_ADDR(block, index) \ | |
| 39 | ((struct xfs_rmap_key *) \ | |
| 40 | ((char *)(block) + XFS_RMAP_BLOCK_LEN + \ | |
| cfed56ae DW |
41 | ((index) - 1) * 2 * sizeof(struct xfs_rmap_key))) |
| 42 | ||
| 43 | #define XFS_RMAP_HIGH_KEY_ADDR(block, index) \ | |
| 44 | ((struct xfs_rmap_key *) \ | |
| 45 | ((char *)(block) + XFS_RMAP_BLOCK_LEN + \ | |
| 46 | sizeof(struct xfs_rmap_key) + \ | |
| 47 | ((index) - 1) * 2 * sizeof(struct xfs_rmap_key))) | |
| 035e00ac DW |
48 | |
| 49 | #define XFS_RMAP_PTR_ADDR(block, index, maxrecs) \ | |
| 50 | ((xfs_rmap_ptr_t *) \ | |
| 51 | ((char *)(block) + XFS_RMAP_BLOCK_LEN + \ | |
| cfed56ae | 52 | (maxrecs) * 2 * sizeof(struct xfs_rmap_key) + \ |
| 035e00ac DW |
53 | ((index) - 1) * sizeof(xfs_rmap_ptr_t))) |
| 54 | ||
| 55 | struct xfs_btree_cur *xfs_rmapbt_init_cursor(struct xfs_mount *mp, | |
| 56 | struct xfs_trans *tp, struct xfs_buf *bp, | |
| 57 | xfs_agnumber_t agno); | |
| a1f69417 | 58 | int xfs_rmapbt_maxrecs(int blocklen, int leaf); |
| 035e00ac DW |
59 | extern void xfs_rmapbt_compute_maxlevels(struct xfs_mount *mp); |
| 60 | ||
| 84d69619 DW |
61 | extern xfs_extlen_t xfs_rmapbt_calc_size(struct xfs_mount *mp, |
| 62 | unsigned long long len); | |
| 20e73b00 DW |
63 | extern xfs_extlen_t xfs_rmapbt_max_size(struct xfs_mount *mp, |
| 64 | xfs_agblock_t agblocks); | |
| 84d69619 DW |
65 | |
| 66 | extern int xfs_rmapbt_calc_reserves(struct xfs_mount *mp, | |
| 67 | xfs_agnumber_t agno, xfs_extlen_t *ask, xfs_extlen_t *used); | |
| 68 | ||
| 035e00ac | 69 | #endif /* __XFS_RMAP_BTREE_H__ */ |