Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2001,2005 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_BTREE_H__ | |
19 | #define __XFS_BTREE_H__ | |
20 | ||
21 | struct xfs_buf; | |
22 | struct xfs_bmap_free; | |
23 | struct xfs_inode; | |
24 | struct xfs_mount; | |
25 | struct xfs_trans; | |
26 | ||
a8272ce0 DC |
27 | extern kmem_zone_t *xfs_btree_cur_zone; |
28 | ||
de227dd9 CH |
29 | /* |
30 | * Generic key, ptr and record wrapper structures. | |
31 | * | |
32 | * These are disk format structures, and are converted where necessary | |
33 | * by the btree specific code that needs to interpret them. | |
34 | */ | |
35 | union xfs_btree_ptr { | |
36 | __be32 s; /* short form ptr */ | |
37 | __be64 l; /* long form ptr */ | |
38 | }; | |
39 | ||
40 | union xfs_btree_key { | |
41 | xfs_bmbt_key_t bmbt; | |
42 | xfs_bmdr_key_t bmbr; /* bmbt root block */ | |
43 | xfs_alloc_key_t alloc; | |
44 | xfs_inobt_key_t inobt; | |
45 | }; | |
46 | ||
47 | union xfs_btree_rec { | |
48 | xfs_bmbt_rec_t bmbt; | |
49 | xfs_bmdr_rec_t bmbr; /* bmbt root block */ | |
50 | xfs_alloc_rec_t alloc; | |
51 | xfs_inobt_rec_t inobt; | |
52 | }; | |
53 | ||
a4fbe6ab DC |
54 | /* |
55 | * This nonsense is to make -wlint happy. | |
56 | */ | |
57 | #define XFS_LOOKUP_EQ ((xfs_lookup_t)XFS_LOOKUP_EQi) | |
58 | #define XFS_LOOKUP_LE ((xfs_lookup_t)XFS_LOOKUP_LEi) | |
59 | #define XFS_LOOKUP_GE ((xfs_lookup_t)XFS_LOOKUP_GEi) | |
60 | ||
61 | #define XFS_BTNUM_BNO ((xfs_btnum_t)XFS_BTNUM_BNOi) | |
62 | #define XFS_BTNUM_CNT ((xfs_btnum_t)XFS_BTNUM_CNTi) | |
63 | #define XFS_BTNUM_BMAP ((xfs_btnum_t)XFS_BTNUM_BMAPi) | |
64 | #define XFS_BTNUM_INO ((xfs_btnum_t)XFS_BTNUM_INOi) | |
aafc3c24 | 65 | #define XFS_BTNUM_FINO ((xfs_btnum_t)XFS_BTNUM_FINOi) |
a4fbe6ab | 66 | |
1da177e4 LT |
67 | /* |
68 | * For logging record fields. | |
69 | */ | |
21b5c978 DC |
70 | #define XFS_BB_MAGIC (1 << 0) |
71 | #define XFS_BB_LEVEL (1 << 1) | |
72 | #define XFS_BB_NUMRECS (1 << 2) | |
73 | #define XFS_BB_LEFTSIB (1 << 3) | |
74 | #define XFS_BB_RIGHTSIB (1 << 4) | |
75 | #define XFS_BB_BLKNO (1 << 5) | |
76 | #define XFS_BB_LSN (1 << 6) | |
77 | #define XFS_BB_UUID (1 << 7) | |
78 | #define XFS_BB_OWNER (1 << 8) | |
1da177e4 LT |
79 | #define XFS_BB_NUM_BITS 5 |
80 | #define XFS_BB_ALL_BITS ((1 << XFS_BB_NUM_BITS) - 1) | |
21b5c978 | 81 | #define XFS_BB_NUM_BITS_CRC 9 |
ee1a47ab | 82 | #define XFS_BB_ALL_BITS_CRC ((1 << XFS_BB_NUM_BITS_CRC) - 1) |
1da177e4 | 83 | |
854929f0 DC |
84 | /* |
85 | * Generic stats interface | |
86 | */ | |
ff6d6af2 BD |
87 | #define __XFS_BTREE_STATS_INC(mp, type, stat) \ |
88 | XFS_STATS_INC(mp, xs_ ## type ## _2_ ## stat) | |
89 | #define XFS_BTREE_STATS_INC(cur, stat) \ | |
854929f0 | 90 | do { \ |
ff6d6af2 | 91 | struct xfs_mount *__mp = cur->bc_mp; \ |
854929f0 | 92 | switch (cur->bc_btnum) { \ |
ff6d6af2 BD |
93 | case XFS_BTNUM_BNO: __XFS_BTREE_STATS_INC(__mp, abtb, stat); break; \ |
94 | case XFS_BTNUM_CNT: __XFS_BTREE_STATS_INC(__mp, abtc, stat); break; \ | |
95 | case XFS_BTNUM_BMAP: __XFS_BTREE_STATS_INC(__mp, bmbt, stat); break; \ | |
96 | case XFS_BTNUM_INO: __XFS_BTREE_STATS_INC(__mp, ibt, stat); break; \ | |
97 | case XFS_BTNUM_FINO: __XFS_BTREE_STATS_INC(__mp, fibt, stat); break; \ | |
854929f0 DC |
98 | case XFS_BTNUM_MAX: ASSERT(0); /* fucking gcc */ ; break; \ |
99 | } \ | |
100 | } while (0) | |
101 | ||
ff6d6af2 BD |
102 | #define __XFS_BTREE_STATS_ADD(mp, type, stat, val) \ |
103 | XFS_STATS_ADD(mp, xs_ ## type ## _2_ ## stat, val) | |
854929f0 DC |
104 | #define XFS_BTREE_STATS_ADD(cur, stat, val) \ |
105 | do { \ | |
ff6d6af2 | 106 | struct xfs_mount *__mp = cur->bc_mp; \ |
854929f0 | 107 | switch (cur->bc_btnum) { \ |
ff6d6af2 BD |
108 | case XFS_BTNUM_BNO: \ |
109 | __XFS_BTREE_STATS_ADD(__mp, abtb, stat, val); break; \ | |
110 | case XFS_BTNUM_CNT: \ | |
111 | __XFS_BTREE_STATS_ADD(__mp, abtc, stat, val); break; \ | |
112 | case XFS_BTNUM_BMAP: \ | |
113 | __XFS_BTREE_STATS_ADD(__mp, bmbt, stat, val); break; \ | |
114 | case XFS_BTNUM_INO: \ | |
115 | __XFS_BTREE_STATS_ADD(__mp, ibt, stat, val); break; \ | |
116 | case XFS_BTNUM_FINO: \ | |
117 | __XFS_BTREE_STATS_ADD(__mp, fibt, stat, val); break; \ | |
118 | case XFS_BTNUM_MAX: ASSERT(0); /* fucking gcc */ ; break; \ | |
854929f0 DC |
119 | } \ |
120 | } while (0) | |
1da177e4 | 121 | |
1da177e4 LT |
122 | #define XFS_BTREE_MAXLEVELS 8 /* max of all btrees */ |
123 | ||
561f7d17 | 124 | struct xfs_btree_ops { |
65f1eaea CH |
125 | /* size of the key and record structures */ |
126 | size_t key_len; | |
127 | size_t rec_len; | |
128 | ||
561f7d17 CH |
129 | /* cursor operations */ |
130 | struct xfs_btree_cur *(*dup_cursor)(struct xfs_btree_cur *); | |
4b22a571 CH |
131 | void (*update_cursor)(struct xfs_btree_cur *src, |
132 | struct xfs_btree_cur *dst); | |
8c4ed633 | 133 | |
344207ce CH |
134 | /* update btree root pointer */ |
135 | void (*set_root)(struct xfs_btree_cur *cur, | |
c0e59e1a | 136 | union xfs_btree_ptr *nptr, int level_change); |
344207ce | 137 | |
f5eb8e7c CH |
138 | /* block allocation / freeing */ |
139 | int (*alloc_block)(struct xfs_btree_cur *cur, | |
140 | union xfs_btree_ptr *start_bno, | |
141 | union xfs_btree_ptr *new_bno, | |
6f8950cd | 142 | int *stat); |
d4b3a4b7 | 143 | int (*free_block)(struct xfs_btree_cur *cur, struct xfs_buf *bp); |
f5eb8e7c | 144 | |
278d0ca1 CH |
145 | /* update last record information */ |
146 | void (*update_lastrec)(struct xfs_btree_cur *cur, | |
147 | struct xfs_btree_block *block, | |
148 | union xfs_btree_rec *rec, | |
149 | int ptr, int reason); | |
150 | ||
ce5e42db | 151 | /* records in block/level */ |
91cca5df | 152 | int (*get_minrecs)(struct xfs_btree_cur *cur, int level); |
ce5e42db CH |
153 | int (*get_maxrecs)(struct xfs_btree_cur *cur, int level); |
154 | ||
4b22a571 CH |
155 | /* records on disk. Matter for the root in inode case. */ |
156 | int (*get_dmaxrecs)(struct xfs_btree_cur *cur, int level); | |
157 | ||
fe033cc8 CH |
158 | /* init values of btree structures */ |
159 | void (*init_key_from_rec)(union xfs_btree_key *key, | |
160 | union xfs_btree_rec *rec); | |
4b22a571 CH |
161 | void (*init_rec_from_key)(union xfs_btree_key *key, |
162 | union xfs_btree_rec *rec); | |
163 | void (*init_rec_from_cur)(struct xfs_btree_cur *cur, | |
164 | union xfs_btree_rec *rec); | |
fe033cc8 CH |
165 | void (*init_ptr_from_cur)(struct xfs_btree_cur *cur, |
166 | union xfs_btree_ptr *ptr); | |
167 | ||
168 | /* difference between key value and cursor value */ | |
169 | __int64_t (*key_diff)(struct xfs_btree_cur *cur, | |
170 | union xfs_btree_key *key); | |
171 | ||
1813dd64 | 172 | const struct xfs_buf_ops *buf_ops; |
b0f539de | 173 | |
742ae1e3 | 174 | #if defined(DEBUG) || defined(XFS_WARN) |
4a26e66e CH |
175 | /* check that k1 is lower than k2 */ |
176 | int (*keys_inorder)(struct xfs_btree_cur *cur, | |
177 | union xfs_btree_key *k1, | |
178 | union xfs_btree_key *k2); | |
179 | ||
180 | /* check that r1 is lower than r2 */ | |
181 | int (*recs_inorder)(struct xfs_btree_cur *cur, | |
182 | union xfs_btree_rec *r1, | |
183 | union xfs_btree_rec *r2); | |
184 | #endif | |
561f7d17 CH |
185 | }; |
186 | ||
278d0ca1 CH |
187 | /* |
188 | * Reasons for the update_lastrec method to be called. | |
189 | */ | |
190 | #define LASTREC_UPDATE 0 | |
4b22a571 | 191 | #define LASTREC_INSREC 1 |
91cca5df | 192 | #define LASTREC_DELREC 2 |
278d0ca1 CH |
193 | |
194 | ||
1da177e4 LT |
195 | /* |
196 | * Btree cursor structure. | |
197 | * This collects all information needed by the btree code in one place. | |
198 | */ | |
199 | typedef struct xfs_btree_cur | |
200 | { | |
201 | struct xfs_trans *bc_tp; /* transaction we're in, if any */ | |
202 | struct xfs_mount *bc_mp; /* file system mount struct */ | |
561f7d17 | 203 | const struct xfs_btree_ops *bc_ops; |
8186e517 | 204 | uint bc_flags; /* btree features - below */ |
1da177e4 | 205 | union { |
16259e7d | 206 | xfs_alloc_rec_incore_t a; |
1da177e4 | 207 | xfs_bmbt_irec_t b; |
61a25848 | 208 | xfs_inobt_rec_incore_t i; |
1da177e4 LT |
209 | } bc_rec; /* current insert/search record value */ |
210 | struct xfs_buf *bc_bufs[XFS_BTREE_MAXLEVELS]; /* buf ptr per level */ | |
211 | int bc_ptrs[XFS_BTREE_MAXLEVELS]; /* key/record # */ | |
212 | __uint8_t bc_ra[XFS_BTREE_MAXLEVELS]; /* readahead bits */ | |
213 | #define XFS_BTCUR_LEFTRA 1 /* left sibling has been read-ahead */ | |
214 | #define XFS_BTCUR_RIGHTRA 2 /* right sibling has been read-ahead */ | |
215 | __uint8_t bc_nlevels; /* number of levels in the tree */ | |
216 | __uint8_t bc_blocklog; /* log2(blocksize) of btree blocks */ | |
217 | xfs_btnum_t bc_btnum; /* identifies which btree type */ | |
218 | union { | |
169d6227 CH |
219 | struct { /* needed for BNO, CNT, INO */ |
220 | struct xfs_buf *agbp; /* agf/agi buffer pointer */ | |
1da177e4 LT |
221 | xfs_agnumber_t agno; /* ag number */ |
222 | } a; | |
223 | struct { /* needed for BMAP */ | |
224 | struct xfs_inode *ip; /* pointer to our inode */ | |
225 | struct xfs_bmap_free *flist; /* list to free after */ | |
226 | xfs_fsblock_t firstblock; /* 1st blk allocated */ | |
227 | int allocated; /* count of alloced */ | |
228 | short forksize; /* fork's inode space */ | |
229 | char whichfork; /* data or attr fork */ | |
230 | char flags; /* flags */ | |
231 | #define XFS_BTCUR_BPRV_WASDEL 1 /* was delayed */ | |
232 | } b; | |
1da177e4 LT |
233 | } bc_private; /* per-btree type data */ |
234 | } xfs_btree_cur_t; | |
235 | ||
8186e517 | 236 | /* cursor flags */ |
e99ab90d | 237 | #define XFS_BTREE_LONG_PTRS (1<<0) /* pointers are 64bits long */ |
8186e517 | 238 | #define XFS_BTREE_ROOT_IN_INODE (1<<1) /* root may be variable size */ |
278d0ca1 | 239 | #define XFS_BTREE_LASTREC_UPDATE (1<<2) /* track last rec externally */ |
ee1a47ab | 240 | #define XFS_BTREE_CRC_BLOCKS (1<<3) /* uses extended btree blocks */ |
8186e517 CH |
241 | |
242 | ||
1da177e4 LT |
243 | #define XFS_BTREE_NOERROR 0 |
244 | #define XFS_BTREE_ERROR 1 | |
245 | ||
246 | /* | |
247 | * Convert from buffer to btree block header. | |
248 | */ | |
62926044 | 249 | #define XFS_BUF_TO_BLOCK(bp) ((struct xfs_btree_block *)((bp)->b_addr)) |
1da177e4 | 250 | |
1da177e4 | 251 | |
1da177e4 | 252 | /* |
a23f6ef8 | 253 | * Check that block header is ok. |
1da177e4 | 254 | */ |
a23f6ef8 CH |
255 | int |
256 | xfs_btree_check_block( | |
257 | struct xfs_btree_cur *cur, /* btree cursor */ | |
258 | struct xfs_btree_block *block, /* generic btree block pointer */ | |
1da177e4 LT |
259 | int level, /* level of the btree block */ |
260 | struct xfs_buf *bp); /* buffer containing block, if any */ | |
261 | ||
262 | /* | |
a23f6ef8 | 263 | * Check that (long) pointer is ok. |
1da177e4 LT |
264 | */ |
265 | int /* error (0 or EFSCORRUPTED) */ | |
266 | xfs_btree_check_lptr( | |
a23f6ef8 | 267 | struct xfs_btree_cur *cur, /* btree cursor */ |
d5cf09ba | 268 | xfs_fsblock_t ptr, /* btree block disk address */ |
1da177e4 LT |
269 | int level); /* btree block level */ |
270 | ||
1da177e4 LT |
271 | /* |
272 | * Delete the btree cursor. | |
273 | */ | |
274 | void | |
275 | xfs_btree_del_cursor( | |
276 | xfs_btree_cur_t *cur, /* btree cursor */ | |
277 | int error); /* del because of error */ | |
278 | ||
279 | /* | |
280 | * Duplicate the btree cursor. | |
281 | * Allocate a new one, copy the record, re-get the buffers. | |
282 | */ | |
283 | int /* error */ | |
284 | xfs_btree_dup_cursor( | |
285 | xfs_btree_cur_t *cur, /* input cursor */ | |
286 | xfs_btree_cur_t **ncur);/* output cursor */ | |
287 | ||
1da177e4 LT |
288 | /* |
289 | * Get a buffer for the block, return it with no data read. | |
290 | * Long-form addressing. | |
291 | */ | |
292 | struct xfs_buf * /* buffer for fsbno */ | |
293 | xfs_btree_get_bufl( | |
294 | struct xfs_mount *mp, /* file system mount point */ | |
295 | struct xfs_trans *tp, /* transaction pointer */ | |
296 | xfs_fsblock_t fsbno, /* file system block number */ | |
297 | uint lock); /* lock flags for get_buf */ | |
298 | ||
299 | /* | |
300 | * Get a buffer for the block, return it with no data read. | |
301 | * Short-form addressing. | |
302 | */ | |
303 | struct xfs_buf * /* buffer for agno/agbno */ | |
304 | xfs_btree_get_bufs( | |
305 | struct xfs_mount *mp, /* file system mount point */ | |
306 | struct xfs_trans *tp, /* transaction pointer */ | |
307 | xfs_agnumber_t agno, /* allocation group number */ | |
308 | xfs_agblock_t agbno, /* allocation group block number */ | |
309 | uint lock); /* lock flags for get_buf */ | |
310 | ||
1da177e4 LT |
311 | /* |
312 | * Check for the cursor referring to the last block at the given level. | |
313 | */ | |
314 | int /* 1=is last block, 0=not last block */ | |
315 | xfs_btree_islastblock( | |
316 | xfs_btree_cur_t *cur, /* btree cursor */ | |
317 | int level); /* level to check */ | |
318 | ||
1da177e4 LT |
319 | /* |
320 | * Compute first and last byte offsets for the fields given. | |
321 | * Interprets the offsets table, which contains struct field offsets. | |
322 | */ | |
323 | void | |
324 | xfs_btree_offsets( | |
325 | __int64_t fields, /* bitmask of fields */ | |
326 | const short *offsets,/* table of field offsets */ | |
327 | int nbits, /* number of bits to inspect */ | |
328 | int *first, /* output: first byte offset */ | |
329 | int *last); /* output: last byte offset */ | |
330 | ||
331 | /* | |
332 | * Get a buffer for the block, return it read in. | |
333 | * Long-form addressing. | |
334 | */ | |
335 | int /* error */ | |
336 | xfs_btree_read_bufl( | |
337 | struct xfs_mount *mp, /* file system mount point */ | |
338 | struct xfs_trans *tp, /* transaction pointer */ | |
339 | xfs_fsblock_t fsbno, /* file system block number */ | |
340 | uint lock, /* lock flags for read_buf */ | |
341 | struct xfs_buf **bpp, /* buffer for fsbno */ | |
3d3e6f64 | 342 | int refval, /* ref count value for buffer */ |
1813dd64 | 343 | const struct xfs_buf_ops *ops); |
1da177e4 | 344 | |
1da177e4 LT |
345 | /* |
346 | * Read-ahead the block, don't wait for it, don't return a buffer. | |
347 | * Long-form addressing. | |
348 | */ | |
349 | void /* error */ | |
350 | xfs_btree_reada_bufl( | |
351 | struct xfs_mount *mp, /* file system mount point */ | |
352 | xfs_fsblock_t fsbno, /* file system block number */ | |
3d3e6f64 | 353 | xfs_extlen_t count, /* count of filesystem blocks */ |
1813dd64 | 354 | const struct xfs_buf_ops *ops); |
1da177e4 LT |
355 | |
356 | /* | |
357 | * Read-ahead the block, don't wait for it, don't return a buffer. | |
358 | * Short-form addressing. | |
359 | */ | |
360 | void /* error */ | |
361 | xfs_btree_reada_bufs( | |
362 | struct xfs_mount *mp, /* file system mount point */ | |
363 | xfs_agnumber_t agno, /* allocation group number */ | |
364 | xfs_agblock_t agbno, /* allocation group block number */ | |
3d3e6f64 | 365 | xfs_extlen_t count, /* count of filesystem blocks */ |
1813dd64 | 366 | const struct xfs_buf_ops *ops); |
1da177e4 | 367 | |
b64f3a39 DC |
368 | /* |
369 | * Initialise a new btree block header | |
370 | */ | |
371 | void | |
372 | xfs_btree_init_block( | |
373 | struct xfs_mount *mp, | |
374 | struct xfs_buf *bp, | |
375 | __u32 magic, | |
376 | __u16 level, | |
377 | __u16 numrecs, | |
ee1a47ab | 378 | __u64 owner, |
b64f3a39 | 379 | unsigned int flags); |
65f1eaea | 380 | |
ee1a47ab CH |
381 | void |
382 | xfs_btree_init_block_int( | |
383 | struct xfs_mount *mp, | |
384 | struct xfs_btree_block *buf, | |
385 | xfs_daddr_t blkno, | |
386 | __u32 magic, | |
387 | __u16 level, | |
388 | __u16 numrecs, | |
389 | __u64 owner, | |
390 | unsigned int flags); | |
391 | ||
637aa50f CH |
392 | /* |
393 | * Common btree core entry points. | |
394 | */ | |
395 | int xfs_btree_increment(struct xfs_btree_cur *, int, int *); | |
8df4da4a | 396 | int xfs_btree_decrement(struct xfs_btree_cur *, int, int *); |
fe033cc8 | 397 | int xfs_btree_lookup(struct xfs_btree_cur *, xfs_lookup_t, int *); |
278d0ca1 | 398 | int xfs_btree_update(struct xfs_btree_cur *, union xfs_btree_rec *); |
ea77b0a6 | 399 | int xfs_btree_new_iroot(struct xfs_btree_cur *, int *, int *); |
4b22a571 | 400 | int xfs_btree_insert(struct xfs_btree_cur *, int *); |
91cca5df | 401 | int xfs_btree_delete(struct xfs_btree_cur *, int *); |
8cc938fe | 402 | int xfs_btree_get_rec(struct xfs_btree_cur *, union xfs_btree_rec **, int *); |
638f4416 DC |
403 | int xfs_btree_change_owner(struct xfs_btree_cur *cur, __uint64_t new_owner, |
404 | struct list_head *buffer_list); | |
637aa50f | 405 | |
ee1a47ab CH |
406 | /* |
407 | * btree block CRC helpers | |
408 | */ | |
409 | void xfs_btree_lblock_calc_crc(struct xfs_buf *); | |
410 | bool xfs_btree_lblock_verify_crc(struct xfs_buf *); | |
411 | void xfs_btree_sblock_calc_crc(struct xfs_buf *); | |
412 | bool xfs_btree_sblock_verify_crc(struct xfs_buf *); | |
413 | ||
fd6bcc5b CH |
414 | /* |
415 | * Internal btree helpers also used by xfs_bmap.c. | |
416 | */ | |
417 | void xfs_btree_log_block(struct xfs_btree_cur *, struct xfs_buf *, int); | |
418 | void xfs_btree_log_recs(struct xfs_btree_cur *, struct xfs_buf *, int, int); | |
419 | ||
65f1eaea CH |
420 | /* |
421 | * Helpers. | |
422 | */ | |
637aa50f CH |
423 | static inline int xfs_btree_get_numrecs(struct xfs_btree_block *block) |
424 | { | |
425 | return be16_to_cpu(block->bb_numrecs); | |
426 | } | |
427 | ||
9eaead51 CH |
428 | static inline void xfs_btree_set_numrecs(struct xfs_btree_block *block, |
429 | __uint16_t numrecs) | |
430 | { | |
431 | block->bb_numrecs = cpu_to_be16(numrecs); | |
432 | } | |
433 | ||
65f1eaea CH |
434 | static inline int xfs_btree_get_level(struct xfs_btree_block *block) |
435 | { | |
436 | return be16_to_cpu(block->bb_level); | |
437 | } | |
438 | ||
1da177e4 LT |
439 | |
440 | /* | |
441 | * Min and max functions for extlen, agblock, fileoff, and filblks types. | |
442 | */ | |
54aa8e26 DC |
443 | #define XFS_EXTLEN_MIN(a,b) min_t(xfs_extlen_t, (a), (b)) |
444 | #define XFS_EXTLEN_MAX(a,b) max_t(xfs_extlen_t, (a), (b)) | |
445 | #define XFS_AGBLOCK_MIN(a,b) min_t(xfs_agblock_t, (a), (b)) | |
446 | #define XFS_AGBLOCK_MAX(a,b) max_t(xfs_agblock_t, (a), (b)) | |
447 | #define XFS_FILEOFF_MIN(a,b) min_t(xfs_fileoff_t, (a), (b)) | |
448 | #define XFS_FILEOFF_MAX(a,b) max_t(xfs_fileoff_t, (a), (b)) | |
449 | #define XFS_FILBLKS_MIN(a,b) min_t(xfs_filblks_t, (a), (b)) | |
450 | #define XFS_FILBLKS_MAX(a,b) max_t(xfs_filblks_t, (a), (b)) | |
a844f451 | 451 | |
1da177e4 LT |
452 | #define XFS_FSB_SANITY_CHECK(mp,fsb) \ |
453 | (XFS_FSB_TO_AGNO(mp, fsb) < mp->m_sb.sb_agcount && \ | |
a844f451 | 454 | XFS_FSB_TO_AGBNO(mp, fsb) < mp->m_sb.sb_agblocks) |
1da177e4 | 455 | |
c84470dd CH |
456 | /* |
457 | * Trace hooks. Currently not implemented as they need to be ported | |
458 | * over to the generic tracing functionality, which is some effort. | |
459 | * | |
460 | * i,j = integer (32 bit) | |
461 | * b = btree block buffer (xfs_buf_t) | |
462 | * p = btree ptr | |
463 | * r = btree record | |
464 | * k = btree key | |
465 | */ | |
466 | #define XFS_BTREE_TRACE_ARGBI(c, b, i) | |
467 | #define XFS_BTREE_TRACE_ARGBII(c, b, i, j) | |
468 | #define XFS_BTREE_TRACE_ARGI(c, i) | |
469 | #define XFS_BTREE_TRACE_ARGIPK(c, i, p, s) | |
470 | #define XFS_BTREE_TRACE_ARGIPR(c, i, p, r) | |
471 | #define XFS_BTREE_TRACE_ARGIK(c, i, k) | |
472 | #define XFS_BTREE_TRACE_ARGR(c, r) | |
473 | #define XFS_BTREE_TRACE_CURSOR(c, t) | |
474 | ||
c5ab131b DW |
475 | bool xfs_btree_sblock_v5hdr_verify(struct xfs_buf *bp); |
476 | bool xfs_btree_sblock_verify(struct xfs_buf *bp, unsigned int max_recs); | |
477 | ||
1da177e4 | 478 | #endif /* __XFS_BTREE_H__ */ |