Commit | Line | Data |
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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000,2002-2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
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 | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
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. | |
1da177e4 | 13 | * |
7b718769 NS |
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 | |
1da177e4 LT |
17 | */ |
18 | #ifndef __XFS_BMAP_BTREE_H__ | |
19 | #define __XFS_BMAP_BTREE_H__ | |
20 | ||
21 | #define XFS_BMAP_MAGIC 0x424d4150 /* 'BMAP' */ | |
22 | ||
23 | struct xfs_btree_cur; | |
24 | struct xfs_btree_lblock; | |
25 | struct xfs_mount; | |
26 | struct xfs_inode; | |
561f7d17 | 27 | struct xfs_trans; |
1da177e4 LT |
28 | |
29 | /* | |
30 | * Bmap root header, on-disk form only. | |
31 | */ | |
16259e7d CH |
32 | typedef struct xfs_bmdr_block { |
33 | __be16 bb_level; /* 0 is a leaf */ | |
34 | __be16 bb_numrecs; /* current # of data records */ | |
1da177e4 LT |
35 | } xfs_bmdr_block_t; |
36 | ||
37 | /* | |
38 | * Bmap btree record and extent descriptor. | |
1da177e4 LT |
39 | * l0:63 is an extent flag (value 1 indicates non-normal). |
40 | * l0:9-62 are startoff. | |
41 | * l0:0-8 and l1:21-63 are startblock. | |
42 | * l1:0-20 are blockcount. | |
43 | */ | |
1da177e4 | 44 | #define BMBT_EXNTFLAG_BITLEN 1 |
1da177e4 | 45 | #define BMBT_STARTOFF_BITLEN 54 |
1da177e4 | 46 | #define BMBT_STARTBLOCK_BITLEN 52 |
1da177e4 LT |
47 | #define BMBT_BLOCKCOUNT_BITLEN 21 |
48 | ||
1da177e4 LT |
49 | |
50 | #define BMBT_USE_64 1 | |
51 | ||
52 | typedef struct xfs_bmbt_rec_32 | |
53 | { | |
54 | __uint32_t l0, l1, l2, l3; | |
55 | } xfs_bmbt_rec_32_t; | |
56 | typedef struct xfs_bmbt_rec_64 | |
57 | { | |
cd8b0a97 | 58 | __be64 l0, l1; |
1da177e4 LT |
59 | } xfs_bmbt_rec_64_t; |
60 | ||
61 | typedef __uint64_t xfs_bmbt_rec_base_t; /* use this for casts */ | |
62 | typedef xfs_bmbt_rec_64_t xfs_bmbt_rec_t, xfs_bmdr_rec_t; | |
63 | ||
a6f64d4a CH |
64 | typedef struct xfs_bmbt_rec_host { |
65 | __uint64_t l0, l1; | |
66 | } xfs_bmbt_rec_host_t; | |
67 | ||
1da177e4 LT |
68 | /* |
69 | * Values and macros for delayed-allocation startblock fields. | |
70 | */ | |
71 | #define STARTBLOCKVALBITS 17 | |
72 | #define STARTBLOCKMASKBITS (15 + XFS_BIG_BLKNOS * 20) | |
73 | #define DSTARTBLOCKMASKBITS (15 + 20) | |
74 | #define STARTBLOCKMASK \ | |
75 | (((((xfs_fsblock_t)1) << STARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS) | |
76 | #define DSTARTBLOCKMASK \ | |
77 | (((((xfs_dfsbno_t)1) << DSTARTBLOCKMASKBITS) - 1) << STARTBLOCKVALBITS) | |
a844f451 | 78 | |
1da177e4 | 79 | #define ISNULLSTARTBLOCK(x) isnullstartblock(x) |
a844f451 NS |
80 | static inline int isnullstartblock(xfs_fsblock_t x) |
81 | { | |
82 | return ((x) & STARTBLOCKMASK) == STARTBLOCKMASK; | |
83 | } | |
84 | ||
1da177e4 | 85 | #define ISNULLDSTARTBLOCK(x) isnulldstartblock(x) |
a844f451 NS |
86 | static inline int isnulldstartblock(xfs_dfsbno_t x) |
87 | { | |
88 | return ((x) & DSTARTBLOCKMASK) == DSTARTBLOCKMASK; | |
89 | } | |
90 | ||
1da177e4 | 91 | #define NULLSTARTBLOCK(k) nullstartblock(k) |
a844f451 NS |
92 | static inline xfs_fsblock_t nullstartblock(int k) |
93 | { | |
94 | ASSERT(k < (1 << STARTBLOCKVALBITS)); | |
95 | return STARTBLOCKMASK | (k); | |
96 | } | |
97 | ||
1da177e4 | 98 | #define STARTBLOCKVAL(x) startblockval(x) |
a844f451 NS |
99 | static inline xfs_filblks_t startblockval(xfs_fsblock_t x) |
100 | { | |
101 | return (xfs_filblks_t)((x) & ~STARTBLOCKMASK); | |
102 | } | |
1da177e4 LT |
103 | |
104 | /* | |
105 | * Possible extent formats. | |
106 | */ | |
107 | typedef enum { | |
108 | XFS_EXTFMT_NOSTATE = 0, | |
109 | XFS_EXTFMT_HASSTATE | |
110 | } xfs_exntfmt_t; | |
111 | ||
112 | /* | |
113 | * Possible extent states. | |
114 | */ | |
115 | typedef enum { | |
116 | XFS_EXT_NORM, XFS_EXT_UNWRITTEN, | |
117 | XFS_EXT_DMAPI_OFFLINE, XFS_EXT_INVALID | |
118 | } xfs_exntst_t; | |
119 | ||
120 | /* | |
121 | * Extent state and extent format macros. | |
122 | */ | |
a844f451 | 123 | #define XFS_EXTFMT_INODE(x) \ |
62118709 | 124 | (xfs_sb_version_hasextflgbit(&((x)->i_mount->m_sb)) ? \ |
a844f451 | 125 | XFS_EXTFMT_HASSTATE : XFS_EXTFMT_NOSTATE) |
1da177e4 LT |
126 | #define ISUNWRITTEN(x) ((x)->br_state == XFS_EXT_UNWRITTEN) |
127 | ||
128 | /* | |
129 | * Incore version of above. | |
130 | */ | |
131 | typedef struct xfs_bmbt_irec | |
132 | { | |
133 | xfs_fileoff_t br_startoff; /* starting file offset */ | |
134 | xfs_fsblock_t br_startblock; /* starting block number */ | |
135 | xfs_filblks_t br_blockcount; /* number of blocks */ | |
136 | xfs_exntst_t br_state; /* extent state */ | |
137 | } xfs_bmbt_irec_t; | |
138 | ||
139 | /* | |
140 | * Key structure for non-leaf levels of the tree. | |
141 | */ | |
8801bb99 CH |
142 | typedef struct xfs_bmbt_key { |
143 | __be64 br_startoff; /* starting file offset */ | |
1da177e4 LT |
144 | } xfs_bmbt_key_t, xfs_bmdr_key_t; |
145 | ||
397b5208 CH |
146 | /* btree pointer type */ |
147 | typedef __be64 xfs_bmbt_ptr_t, xfs_bmdr_ptr_t; | |
148 | ||
149 | /* btree block header type */ | |
1da177e4 LT |
150 | typedef struct xfs_btree_lblock xfs_bmbt_block_t; |
151 | ||
a844f451 | 152 | #define XFS_BUF_TO_BMBT_BLOCK(bp) ((xfs_bmbt_block_t *)XFS_BUF_PTR(bp)) |
1da177e4 | 153 | |
2c36dded ES |
154 | #define XFS_BMAP_REC_DADDR(bb,i,cur) (XFS_BTREE_REC_ADDR(xfs_bmbt, bb, i)) |
155 | ||
156 | #define XFS_BMAP_REC_IADDR(bb,i,cur) (XFS_BTREE_REC_ADDR(xfs_bmbt, bb, i)) | |
a844f451 NS |
157 | |
158 | #define XFS_BMAP_KEY_DADDR(bb,i,cur) \ | |
2c36dded ES |
159 | (XFS_BTREE_KEY_ADDR(xfs_bmbt, bb, i)) |
160 | ||
a844f451 | 161 | #define XFS_BMAP_KEY_IADDR(bb,i,cur) \ |
2c36dded | 162 | (XFS_BTREE_KEY_ADDR(xfs_bmbt, bb, i)) |
a844f451 NS |
163 | |
164 | #define XFS_BMAP_PTR_DADDR(bb,i,cur) \ | |
2c36dded | 165 | (XFS_BTREE_PTR_ADDR(xfs_bmbt, bb, i, XFS_BMAP_BLOCK_DMAXRECS( \ |
16259e7d | 166 | be16_to_cpu((bb)->bb_level), cur))) |
a844f451 | 167 | #define XFS_BMAP_PTR_IADDR(bb,i,cur) \ |
60197e8d CH |
168 | (XFS_BTREE_PTR_ADDR(xfs_bmbt, bb, i, xfs_bmbt_get_maxrecs(cur, \ |
169 | be16_to_cpu((bb)->bb_level)))) | |
1da177e4 LT |
170 | |
171 | /* | |
172 | * These are to be used when we know the size of the block and | |
173 | * we don't have a cursor. | |
174 | */ | |
1da177e4 | 175 | #define XFS_BMAP_BROOT_REC_ADDR(bb,i,sz) \ |
2c36dded | 176 | (XFS_BTREE_REC_ADDR(xfs_bmbt,bb,i)) |
1da177e4 | 177 | #define XFS_BMAP_BROOT_KEY_ADDR(bb,i,sz) \ |
2c36dded | 178 | (XFS_BTREE_KEY_ADDR(xfs_bmbt,bb,i)) |
60197e8d CH |
179 | #define XFS_BMAP_BROOT_PTR_ADDR(mp, bb,i,sz) \ |
180 | (XFS_BTREE_PTR_ADDR(xfs_bmbt,bb,i,xfs_bmbt_maxrecs(mp, sz, 0))) | |
1da177e4 | 181 | |
1da177e4 | 182 | #define XFS_BMAP_BROOT_SPACE_CALC(nrecs) \ |
a844f451 NS |
183 | (int)(sizeof(xfs_bmbt_block_t) + \ |
184 | ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))) | |
185 | ||
1da177e4 | 186 | #define XFS_BMAP_BROOT_SPACE(bb) \ |
16259e7d | 187 | (XFS_BMAP_BROOT_SPACE_CALC(be16_to_cpu((bb)->bb_numrecs))) |
a844f451 NS |
188 | #define XFS_BMDR_SPACE_CALC(nrecs) \ |
189 | (int)(sizeof(xfs_bmdr_block_t) + \ | |
190 | ((nrecs) * (sizeof(xfs_bmbt_key_t) + sizeof(xfs_bmbt_ptr_t)))) | |
1da177e4 LT |
191 | |
192 | /* | |
193 | * Maximum number of bmap btree levels. | |
194 | */ | |
a844f451 | 195 | #define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)]) |
1da177e4 | 196 | |
a844f451 | 197 | #define XFS_BMAP_SANITY_CHECK(mp,bb,level) \ |
16259e7d CH |
198 | (be32_to_cpu((bb)->bb_magic) == XFS_BMAP_MAGIC && \ |
199 | be16_to_cpu((bb)->bb_level) == level && \ | |
200 | be16_to_cpu((bb)->bb_numrecs) > 0 && \ | |
201 | be16_to_cpu((bb)->bb_numrecs) <= (mp)->m_bmap_dmxr[(level) != 0]) | |
1da177e4 LT |
202 | |
203 | ||
1da177e4 LT |
204 | /* |
205 | * Prototypes for xfs_bmap.c to call. | |
206 | */ | |
60197e8d CH |
207 | extern void xfs_bmdr_to_bmbt(struct xfs_mount *, xfs_bmdr_block_t *, int, |
208 | xfs_bmbt_block_t *, int); | |
a6f64d4a | 209 | extern void xfs_bmbt_get_all(xfs_bmbt_rec_host_t *r, xfs_bmbt_irec_t *s); |
a6f64d4a CH |
210 | extern xfs_filblks_t xfs_bmbt_get_blockcount(xfs_bmbt_rec_host_t *r); |
211 | extern xfs_fsblock_t xfs_bmbt_get_startblock(xfs_bmbt_rec_host_t *r); | |
212 | extern xfs_fileoff_t xfs_bmbt_get_startoff(xfs_bmbt_rec_host_t *r); | |
213 | extern xfs_exntst_t xfs_bmbt_get_state(xfs_bmbt_rec_host_t *r); | |
1da177e4 | 214 | |
a844f451 | 215 | extern void xfs_bmbt_disk_get_all(xfs_bmbt_rec_t *r, xfs_bmbt_irec_t *s); |
a844f451 | 216 | extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(xfs_bmbt_rec_t *r); |
a844f451 | 217 | extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(xfs_bmbt_rec_t *r); |
1da177e4 | 218 | |
a6f64d4a CH |
219 | extern void xfs_bmbt_set_all(xfs_bmbt_rec_host_t *r, xfs_bmbt_irec_t *s); |
220 | extern void xfs_bmbt_set_allf(xfs_bmbt_rec_host_t *r, xfs_fileoff_t o, | |
a844f451 | 221 | xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v); |
a6f64d4a CH |
222 | extern void xfs_bmbt_set_blockcount(xfs_bmbt_rec_host_t *r, xfs_filblks_t v); |
223 | extern void xfs_bmbt_set_startblock(xfs_bmbt_rec_host_t *r, xfs_fsblock_t v); | |
224 | extern void xfs_bmbt_set_startoff(xfs_bmbt_rec_host_t *r, xfs_fileoff_t v); | |
225 | extern void xfs_bmbt_set_state(xfs_bmbt_rec_host_t *r, xfs_exntst_t v); | |
1da177e4 | 226 | |
a844f451 NS |
227 | extern void xfs_bmbt_disk_set_all(xfs_bmbt_rec_t *r, xfs_bmbt_irec_t *s); |
228 | extern void xfs_bmbt_disk_set_allf(xfs_bmbt_rec_t *r, xfs_fileoff_t o, | |
229 | xfs_fsblock_t b, xfs_filblks_t c, xfs_exntst_t v); | |
1da177e4 | 230 | |
60197e8d CH |
231 | extern void xfs_bmbt_to_bmdr(struct xfs_mount *, xfs_bmbt_block_t *, int, |
232 | xfs_bmdr_block_t *, int); | |
233 | ||
234 | extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level); | |
235 | extern int xfs_bmdr_maxrecs(struct xfs_mount *, int blocklen, int leaf); | |
236 | extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf); | |
1da177e4 | 237 | |
561f7d17 CH |
238 | extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *, |
239 | struct xfs_trans *, struct xfs_inode *, int); | |
240 | ||
1da177e4 LT |
241 | |
242 | #endif /* __XFS_BMAP_BTREE_H__ */ |