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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000,2002-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * 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
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
18#ifndef __XFS_BMAP_BTREE_H__
19#define __XFS_BMAP_BTREE_H__
20
Linus Torvalds1da177e2005-04-16 15:20:36 -070021struct xfs_btree_cur;
Christoph Hellwig136341b2008-10-30 17:11:40 +110022struct xfs_btree_block;
Linus Torvalds1da177e2005-04-16 15:20:36 -070023struct xfs_mount;
24struct xfs_inode;
Christoph Hellwig561f7d12008-10-30 16:53:59 +110025struct xfs_trans;
Linus Torvalds1da177e2005-04-16 15:20:36 -070026
27/*
Linus Torvalds1da177e2005-04-16 15:20:36 -070028 * Extent state and extent format macros.
29 */
Nathan Scotta844f452005-11-02 14:38:42 +110030#define XFS_EXTFMT_INODE(x) \
Eric Sandeen62118702008-03-06 13:44:28 +110031 (xfs_sb_version_hasextflgbit(&((x)->i_mount->m_sb)) ? \
Nathan Scotta844f452005-11-02 14:38:42 +110032 XFS_EXTFMT_HASSTATE : XFS_EXTFMT_NOSTATE)
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#define ISUNWRITTEN(x) ((x)->br_state == XFS_EXT_UNWRITTEN)
34
35/*
Christoph Hellwig7cc95a82008-10-30 17:14:34 +110036 * Btree block header size depends on a superblock flag.
Christoph Hellwig7cc95a82008-10-30 17:14:34 +110037 */
Christoph Hellwigee1a47a2013-04-21 14:53:46 -050038#define XFS_BMBT_BLOCK_LEN(mp) \
39 (xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
40 XFS_BTREE_LBLOCK_CRC_LEN : XFS_BTREE_LBLOCK_LEN)
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
Christoph Hellwig136341b2008-10-30 17:11:40 +110042#define XFS_BMBT_REC_ADDR(mp, block, index) \
43 ((xfs_bmbt_rec_t *) \
44 ((char *)(block) + \
Christoph Hellwig7cc95a82008-10-30 17:14:34 +110045 XFS_BMBT_BLOCK_LEN(mp) + \
Christoph Hellwig136341b2008-10-30 17:11:40 +110046 ((index) - 1) * sizeof(xfs_bmbt_rec_t)))
Eric Sandeen2c36dde2007-02-10 18:37:33 +110047
Christoph Hellwig136341b2008-10-30 17:11:40 +110048#define XFS_BMBT_KEY_ADDR(mp, block, index) \
49 ((xfs_bmbt_key_t *) \
50 ((char *)(block) + \
Christoph Hellwig7cc95a82008-10-30 17:14:34 +110051 XFS_BMBT_BLOCK_LEN(mp) + \
Christoph Hellwig136341b2008-10-30 17:11:40 +110052 ((index) - 1) * sizeof(xfs_bmbt_key_t)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070053
Christoph Hellwig136341b2008-10-30 17:11:40 +110054#define XFS_BMBT_PTR_ADDR(mp, block, index, maxrecs) \
55 ((xfs_bmbt_ptr_t *) \
56 ((char *)(block) + \
Christoph Hellwig7cc95a82008-10-30 17:14:34 +110057 XFS_BMBT_BLOCK_LEN(mp) + \
Christoph Hellwig136341b2008-10-30 17:11:40 +110058 (maxrecs) * sizeof(xfs_bmbt_key_t) + \
59 ((index) - 1) * sizeof(xfs_bmbt_ptr_t)))
Eric Sandeen2c36dde2007-02-10 18:37:33 +110060
Christoph Hellwig136341b2008-10-30 17:11:40 +110061#define XFS_BMDR_REC_ADDR(block, index) \
62 ((xfs_bmdr_rec_t *) \
63 ((char *)(block) + \
64 sizeof(struct xfs_bmdr_block) + \
65 ((index) - 1) * sizeof(xfs_bmdr_rec_t)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
Christoph Hellwig136341b2008-10-30 17:11:40 +110067#define XFS_BMDR_KEY_ADDR(block, index) \
68 ((xfs_bmdr_key_t *) \
69 ((char *)(block) + \
70 sizeof(struct xfs_bmdr_block) + \
71 ((index) - 1) * sizeof(xfs_bmdr_key_t)))
72
73#define XFS_BMDR_PTR_ADDR(block, index, maxrecs) \
74 ((xfs_bmdr_ptr_t *) \
75 ((char *)(block) + \
76 sizeof(struct xfs_bmdr_block) + \
77 (maxrecs) * sizeof(xfs_bmdr_key_t) + \
78 ((index) - 1) * sizeof(xfs_bmdr_ptr_t)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070079
80/*
81 * These are to be used when we know the size of the block and
82 * we don't have a cursor.
83 */
Christoph Hellwig136341b2008-10-30 17:11:40 +110084#define XFS_BMAP_BROOT_PTR_ADDR(mp, bb, i, sz) \
85 XFS_BMBT_PTR_ADDR(mp, bb, i, xfs_bmbt_maxrecs(mp, sz, 0))
Nathan Scotta844f452005-11-02 14:38:42 +110086
Christoph Hellwigee1a47a2013-04-21 14:53:46 -050087#define XFS_BMAP_BROOT_SPACE_CALC(mp, nrecs) \
88 (int)(XFS_BMBT_BLOCK_LEN(mp) + \
Nathan Scotta844f452005-11-02 14:38:42 +110089 ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
90
Christoph Hellwigee1a47a2013-04-21 14:53:46 -050091#define XFS_BMAP_BROOT_SPACE(mp, bb) \
92 (XFS_BMAP_BROOT_SPACE_CALC(mp, be16_to_cpu((bb)->bb_numrecs)))
Nathan Scotta844f452005-11-02 14:38:42 +110093#define XFS_BMDR_SPACE_CALC(nrecs) \
94 (int)(sizeof(xfs_bmdr_block_t) + \
95 ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t))))
Eric Sandeen427d9fe2012-03-27 15:40:26 -050096#define XFS_BMAP_BMDR_SPACE(bb) \
97 (XFS_BMDR_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs)))
Linus Torvalds1da177e2005-04-16 15:20:36 -070098
99/*
100 * Maximum number of bmap btree levels.
101 */
Nathan Scotta844f452005-11-02 14:38:42 +1100102#define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)])
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104/*
105 * Prototypes for xfs_bmap.c to call.
106 */
Christoph Hellwigee1a47a2013-04-21 14:53:46 -0500107extern void xfs_bmdr_to_bmbt(struct xfs_inode *, xfs_bmdr_block_t *, int,
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100108 struct xfs_btree_block *, int);
Christoph Hellwiga6f64d42007-08-16 16:23:40 +1000109extern void xfs_bmbt_get_all(xfs_bmbt_rec_host_t *r, xfs_bmbt_irec_t *s);
Christoph Hellwiga6f64d42007-08-16 16:23:40 +1000110extern xfs_filblks_t xfs_bmbt_get_blockcount(xfs_bmbt_rec_host_t *r);
111extern xfs_fsblock_t xfs_bmbt_get_startblock(xfs_bmbt_rec_host_t *r);
112extern xfs_fileoff_t xfs_bmbt_get_startoff(xfs_bmbt_rec_host_t *r);
113extern xfs_exntst_t xfs_bmbt_get_state(xfs_bmbt_rec_host_t *r);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114
Nathan Scotta844f452005-11-02 14:38:42 +1100115extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(xfs_bmbt_rec_t *r);
Nathan Scotta844f452005-11-02 14:38:42 +1100116extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(xfs_bmbt_rec_t *r);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117
Christoph Hellwiga6f64d42007-08-16 16:23:40 +1000118extern void xfs_bmbt_set_all(xfs_bmbt_rec_host_t *r, xfs_bmbt_irec_t *s);
119extern void xfs_bmbt_set_allf(xfs_bmbt_rec_host_t *r, xfs_fileoff_t o,
Nathan Scotta844f452005-11-02 14:38:42 +1100120 xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v);
Christoph Hellwiga6f64d42007-08-16 16:23:40 +1000121extern void xfs_bmbt_set_blockcount(xfs_bmbt_rec_host_t *r, xfs_filblks_t v);
122extern void xfs_bmbt_set_startblock(xfs_bmbt_rec_host_t *r, xfs_fsblock_t v);
123extern void xfs_bmbt_set_startoff(xfs_bmbt_rec_host_t *r, xfs_fileoff_t v);
124extern void xfs_bmbt_set_state(xfs_bmbt_rec_host_t *r, xfs_exntst_t v);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125
Nathan Scotta844f452005-11-02 14:38:42 +1100126extern void xfs_bmbt_disk_set_allf(xfs_bmbt_rec_t *r, xfs_fileoff_t o,
127 xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128
Christoph Hellwig7cc95a82008-10-30 17:14:34 +1100129extern void xfs_bmbt_to_bmdr(struct xfs_mount *, struct xfs_btree_block *, int,
Christoph Hellwig60197e82008-10-30 17:11:19 +1100130 xfs_bmdr_block_t *, int);
131
132extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level);
133extern int xfs_bmdr_maxrecs(struct xfs_mount *, int blocklen, int leaf);
134extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135
Dave Chinner21b5c972013-08-30 10:23:44 +1000136extern int xfs_bmbt_change_owner(struct xfs_trans *tp, struct xfs_inode *ip,
Dave Chinner638f44162013-08-30 10:23:45 +1000137 int whichfork, xfs_ino_t new_owner,
138 struct list_head *buffer_list);
Dave Chinner21b5c972013-08-30 10:23:44 +1000139
Christoph Hellwig561f7d12008-10-30 16:53:59 +1100140extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *,
141 struct xfs_trans *, struct xfs_inode *, int);
142
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143#endif /* __XFS_BMAP_BTREE_H__ */