1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
4 * All Rights Reserved.
5 */
6 #ifndef __XFS_BTREE_H__
7 #define __XFS_BTREE_H__
8
9 struct xfs_buf;
10 struct xfs_inode;
11 struct xfs_mount;
12 struct xfs_trans;
13 struct xfs_ifork;
14
15 extern kmem_zone_t *xfs_btree_cur_zone;
16
17 /*
18 * Generic key, ptr and record wrapper structures.
19 *
20 * These are disk format structures, and are converted where necessary
21 * by the btree specific code that needs to interpret them.
22 */
23 union xfs_btree_ptr {
24 __be32 s; /* short form ptr */
25 __be64 l; /* long form ptr */
26 };
27
28 /*
29 * The in-core btree key. Overlapping btrees actually store two keys
30 * per pointer, so we reserve enough memory to hold both. The __*bigkey
31 * items should never be accessed directly.
32 */
33 union xfs_btree_key {
34 struct xfs_bmbt_key bmbt;
35 xfs_bmdr_key_t bmbr; /* bmbt root block */
36 xfs_alloc_key_t alloc;
37 struct xfs_inobt_key inobt;
38 struct xfs_rmap_key rmap;
39 struct xfs_rmap_key __rmap_bigkey[2];
40 struct xfs_refcount_key refc;
41 };
42
43 union xfs_btree_rec {
44 struct xfs_bmbt_rec bmbt;
45 xfs_bmdr_rec_t bmbr; /* bmbt root block */
46 struct xfs_alloc_rec alloc;
47 struct xfs_inobt_rec inobt;
48 struct xfs_rmap_rec rmap;
49 struct xfs_refcount_rec refc;
50 };
51
52 /*
53 * This nonsense is to make -wlint happy.
54 */
55 #define XFS_LOOKUP_EQ ((xfs_lookup_t)XFS_LOOKUP_EQi)
56 #define XFS_LOOKUP_LE ((xfs_lookup_t)XFS_LOOKUP_LEi)
57 #define XFS_LOOKUP_GE ((xfs_lookup_t)XFS_LOOKUP_GEi)
58
59 #define XFS_BTNUM_BNO ((xfs_btnum_t)XFS_BTNUM_BNOi)
60 #define XFS_BTNUM_CNT ((xfs_btnum_t)XFS_BTNUM_CNTi)
61 #define XFS_BTNUM_BMAP ((xfs_btnum_t)XFS_BTNUM_BMAPi)
62 #define XFS_BTNUM_INO ((xfs_btnum_t)XFS_BTNUM_INOi)
63 #define XFS_BTNUM_FINO ((xfs_btnum_t)XFS_BTNUM_FINOi)
64 #define XFS_BTNUM_RMAP ((xfs_btnum_t)XFS_BTNUM_RMAPi)
65 #define XFS_BTNUM_REFC ((xfs_btnum_t)XFS_BTNUM_REFCi)
66
67 uint32_t xfs_btree_magic(int crc, xfs_btnum_t btnum);
68
69 /*
70 * For logging record fields.
71 */
72 #define XFS_BB_MAGIC (1 << 0)
73 #define XFS_BB_LEVEL (1 << 1)
74 #define XFS_BB_NUMRECS (1 << 2)
75 #define XFS_BB_LEFTSIB (1 << 3)
76 #define XFS_BB_RIGHTSIB (1 << 4)
77 #define XFS_BB_BLKNO (1 << 5)
78 #define XFS_BB_LSN (1 << 6)
79 #define XFS_BB_UUID (1 << 7)
80 #define XFS_BB_OWNER (1 << 8)
81 #define XFS_BB_NUM_BITS 5
82 #define XFS_BB_ALL_BITS ((1 << XFS_BB_NUM_BITS) - 1)
83 #define XFS_BB_NUM_BITS_CRC 9
84 #define XFS_BB_ALL_BITS_CRC ((1 << XFS_BB_NUM_BITS_CRC) - 1)
85
86 /*
87 * Generic stats interface
88 */
89 #define XFS_BTREE_STATS_INC(cur, stat) \
90 XFS_STATS_INC_OFF((cur)->bc_mp, (cur)->bc_statoff + __XBTS_ ## stat)
91 #define XFS_BTREE_STATS_ADD(cur, stat, val) \
92 XFS_STATS_ADD_OFF((cur)->bc_mp, (cur)->bc_statoff + __XBTS_ ## stat, val)
93
94 #define XFS_BTREE_MAXLEVELS 9 /* max of all btrees */
95
96 struct xfs_btree_ops {
97 /* size of the key and record structures */
98 size_t key_len;
99 size_t rec_len;
100
101 /* cursor operations */
102 struct xfs_btree_cur *(*dup_cursor)(struct xfs_btree_cur *);
103 void (*update_cursor)(struct xfs_btree_cur *src,
104 struct xfs_btree_cur *dst);
105
106 /* update btree root pointer */
107 void (*set_root)(struct xfs_btree_cur *cur,
108 union xfs_btree_ptr *nptr, int level_change);
109
110 /* block allocation / freeing */
111 int (*alloc_block)(struct xfs_btree_cur *cur,
112 union xfs_btree_ptr *start_bno,
113 union xfs_btree_ptr *new_bno,
114 int *stat);
115 int (*free_block)(struct xfs_btree_cur *cur, struct xfs_buf *bp);
116
117 /* update last record information */
118 void (*update_lastrec)(struct xfs_btree_cur *cur,
119 struct xfs_btree_block *block,
120 union xfs_btree_rec *rec,
121 int ptr, int reason);
122
123 /* records in block/level */
124 int (*get_minrecs)(struct xfs_btree_cur *cur, int level);
125 int (*get_maxrecs)(struct xfs_btree_cur *cur, int level);
126
127 /* records on disk. Matter for the root in inode case. */
128 int (*get_dmaxrecs)(struct xfs_btree_cur *cur, int level);
129
130 /* init values of btree structures */
131 void (*init_key_from_rec)(union xfs_btree_key *key,
132 union xfs_btree_rec *rec);
133 void (*init_rec_from_cur)(struct xfs_btree_cur *cur,
134 union xfs_btree_rec *rec);
135 void (*init_ptr_from_cur)(struct xfs_btree_cur *cur,
136 union xfs_btree_ptr *ptr);
137 void (*init_high_key_from_rec)(union xfs_btree_key *key,
138 union xfs_btree_rec *rec);
139
140 /* difference between key value and cursor value */
141 int64_t (*key_diff)(struct xfs_btree_cur *cur,
142 union xfs_btree_key *key);
143
144 /*
145 * Difference between key2 and key1 -- positive if key1 > key2,
146 * negative if key1 < key2, and zero if equal.
147 */
148 int64_t (*diff_two_keys)(struct xfs_btree_cur *cur,
149 union xfs_btree_key *key1,
150 union xfs_btree_key *key2);
151
152 const struct xfs_buf_ops *buf_ops;
153
154 /* check that k1 is lower than k2 */
155 int (*keys_inorder)(struct xfs_btree_cur *cur,
156 union xfs_btree_key *k1,
157 union xfs_btree_key *k2);
158
159 /* check that r1 is lower than r2 */
160 int (*recs_inorder)(struct xfs_btree_cur *cur,
161 union xfs_btree_rec *r1,
162 union xfs_btree_rec *r2);
163 };
164
165 /*
166 * Reasons for the update_lastrec method to be called.
167 */
168 #define LASTREC_UPDATE 0
169 #define LASTREC_INSREC 1
170 #define LASTREC_DELREC 2
171
172
173 union xfs_btree_irec {
174 struct xfs_alloc_rec_incore a;
175 struct xfs_bmbt_irec b;
176 struct xfs_inobt_rec_incore i;
177 struct xfs_rmap_irec r;
178 struct xfs_refcount_irec rc;
179 };
180
181 /* Per-AG btree information. */
182 struct xfs_btree_cur_ag {
183 union {
184 struct xfs_buf *agbp;
185 struct xbtree_afakeroot *afake; /* for staging cursor */
186 };
187 xfs_agnumber_t agno;
188 union {
189 struct {
190 unsigned long nr_ops; /* # record updates */
191 int shape_changes; /* # of extent splits */
192 } refc;
193 struct {
194 bool active; /* allocation cursor state */
195 } abt;
196 };
197 };
198
199 /* Btree-in-inode cursor information */
200 struct xfs_btree_cur_ino {
201 struct xfs_inode *ip;
202 struct xbtree_ifakeroot *ifake; /* for staging cursor */
203 int allocated;
204 short forksize;
205 char whichfork;
206 char flags;
207 /* We are converting a delalloc reservation */
208 #define XFS_BTCUR_BMBT_WASDEL (1 << 0)
209
210 /* For extent swap, ignore owner check in verifier */
211 #define XFS_BTCUR_BMBT_INVALID_OWNER (1 << 1)
212 };
213
214 /*
215 * Btree cursor structure.
216 * This collects all information needed by the btree code in one place.
217 */
218 typedef struct xfs_btree_cur
219 {
220 struct xfs_trans *bc_tp; /* transaction we're in, if any */
221 struct xfs_mount *bc_mp; /* file system mount struct */
222 const struct xfs_btree_ops *bc_ops;
223 uint bc_flags; /* btree features - below */
224 union xfs_btree_irec bc_rec; /* current insert/search record value */
225 struct xfs_buf *bc_bufs[XFS_BTREE_MAXLEVELS]; /* buf ptr per level */
226 int bc_ptrs[XFS_BTREE_MAXLEVELS]; /* key/record # */
227 uint8_t bc_ra[XFS_BTREE_MAXLEVELS]; /* readahead bits */
228 #define XFS_BTCUR_LEFTRA 1 /* left sibling has been read-ahead */
229 #define XFS_BTCUR_RIGHTRA 2 /* right sibling has been read-ahead */
230 uint8_t bc_nlevels; /* number of levels in the tree */
231 uint8_t bc_blocklog; /* log2(blocksize) of btree blocks */
232 xfs_btnum_t bc_btnum; /* identifies which btree type */
233 int bc_statoff; /* offset of btre stats array */
234 union {
235 struct xfs_btree_cur_ag bc_ag;
236 struct xfs_btree_cur_ino bc_ino;
237 };
238 } xfs_btree_cur_t;
239
240 /* cursor flags */
241 #define XFS_BTREE_LONG_PTRS (1<<0) /* pointers are 64bits long */
242 #define XFS_BTREE_ROOT_IN_INODE (1<<1) /* root may be variable size */
243 #define XFS_BTREE_LASTREC_UPDATE (1<<2) /* track last rec externally */
244 #define XFS_BTREE_CRC_BLOCKS (1<<3) /* uses extended btree blocks */
245 #define XFS_BTREE_OVERLAPPING (1<<4) /* overlapping intervals */
246 /*
247 * The root of this btree is a fakeroot structure so that we can stage a btree
248 * rebuild without leaving it accessible via primary metadata. The ops struct
249 * is dynamically allocated and must be freed when the cursor is deleted.
250 */
251 #define XFS_BTREE_STAGING (1<<5)
252
253
254 #define XFS_BTREE_NOERROR 0
255 #define XFS_BTREE_ERROR 1
256
257 /*
258 * Convert from buffer to btree block header.
259 */
260 #define XFS_BUF_TO_BLOCK(bp) ((struct xfs_btree_block *)((bp)->b_addr))
261
262 /*
263 * Internal long and short btree block checks. They return NULL if the
264 * block is ok or the address of the failed check otherwise.
265 */
266 xfs_failaddr_t __xfs_btree_check_lblock(struct xfs_btree_cur *cur,
267 struct xfs_btree_block *block, int level, struct xfs_buf *bp);
268 xfs_failaddr_t __xfs_btree_check_sblock(struct xfs_btree_cur *cur,
269 struct xfs_btree_block *block, int level, struct xfs_buf *bp);
270
271 /*
272 * Check that block header is ok.
273 */
274 int
275 xfs_btree_check_block(
276 struct xfs_btree_cur *cur, /* btree cursor */
277 struct xfs_btree_block *block, /* generic btree block pointer */
278 int level, /* level of the btree block */
279 struct xfs_buf *bp); /* buffer containing block, if any */
280
281 /*
282 * Check that (long) pointer is ok.
283 */
284 bool /* error (0 or EFSCORRUPTED) */
285 xfs_btree_check_lptr(
286 struct xfs_btree_cur *cur, /* btree cursor */
287 xfs_fsblock_t fsbno, /* btree block disk address */
288 int level); /* btree block level */
289
290 /*
291 * Check that (short) pointer is ok.
292 */
293 bool /* error (0 or EFSCORRUPTED) */
294 xfs_btree_check_sptr(
295 struct xfs_btree_cur *cur, /* btree cursor */
296 xfs_agblock_t agbno, /* btree block disk address */
297 int level); /* btree block level */
298
299 /*
300 * Delete the btree cursor.
301 */
302 void
303 xfs_btree_del_cursor(
304 xfs_btree_cur_t *cur, /* btree cursor */
305 int error); /* del because of error */
306
307 /*
308 * Duplicate the btree cursor.
309 * Allocate a new one, copy the record, re-get the buffers.
310 */
311 int /* error */
312 xfs_btree_dup_cursor(
313 xfs_btree_cur_t *cur, /* input cursor */
314 xfs_btree_cur_t **ncur);/* output cursor */
315
316 /*
317 * Compute first and last byte offsets for the fields given.
318 * Interprets the offsets table, which contains struct field offsets.
319 */
320 void
321 xfs_btree_offsets(
322 int64_t fields, /* bitmask of fields */
323 const short *offsets,/* table of field offsets */
324 int nbits, /* number of bits to inspect */
325 int *first, /* output: first byte offset */
326 int *last); /* output: last byte offset */
327
328 /*
329 * Get a buffer for the block, return it read in.
330 * Long-form addressing.
331 */
332 int /* error */
333 xfs_btree_read_bufl(
334 struct xfs_mount *mp, /* file system mount point */
335 struct xfs_trans *tp, /* transaction pointer */
336 xfs_fsblock_t fsbno, /* file system block number */
337 struct xfs_buf **bpp, /* buffer for fsbno */
338 int refval, /* ref count value for buffer */
339 const struct xfs_buf_ops *ops);
340
341 /*
342 * Read-ahead the block, don't wait for it, don't return a buffer.
343 * Long-form addressing.
344 */
345 void /* error */
346 xfs_btree_reada_bufl(
347 struct xfs_mount *mp, /* file system mount point */
348 xfs_fsblock_t fsbno, /* file system block number */
349 xfs_extlen_t count, /* count of filesystem blocks */
350 const struct xfs_buf_ops *ops);
351
352 /*
353 * Read-ahead the block, don't wait for it, don't return a buffer.
354 * Short-form addressing.
355 */
356 void /* error */
357 xfs_btree_reada_bufs(
358 struct xfs_mount *mp, /* file system mount point */
359 xfs_agnumber_t agno, /* allocation group number */
360 xfs_agblock_t agbno, /* allocation group block number */
361 xfs_extlen_t count, /* count of filesystem blocks */
362 const struct xfs_buf_ops *ops);
363
364 /*
365 * Initialise a new btree block header
366 */
367 void
368 xfs_btree_init_block(
369 struct xfs_mount *mp,
370 struct xfs_buf *bp,
371 xfs_btnum_t btnum,
372 __u16 level,
373 __u16 numrecs,
374 __u64 owner);
375
376 void
377 xfs_btree_init_block_int(
378 struct xfs_mount *mp,
379 struct xfs_btree_block *buf,
380 xfs_daddr_t blkno,
381 xfs_btnum_t btnum,
382 __u16 level,
383 __u16 numrecs,
384 __u64 owner,
385 unsigned int flags);
386
387 /*
388 * Common btree core entry points.
389 */
390 int xfs_btree_increment(struct xfs_btree_cur *, int, int *);
391 int xfs_btree_decrement(struct xfs_btree_cur *, int, int *);
392 int xfs_btree_lookup(struct xfs_btree_cur *, xfs_lookup_t, int *);
393 int xfs_btree_update(struct xfs_btree_cur *, union xfs_btree_rec *);
394 int xfs_btree_new_iroot(struct xfs_btree_cur *, int *, int *);
395 int xfs_btree_insert(struct xfs_btree_cur *, int *);
396 int xfs_btree_delete(struct xfs_btree_cur *, int *);
397 int xfs_btree_get_rec(struct xfs_btree_cur *, union xfs_btree_rec **, int *);
398 int xfs_btree_change_owner(struct xfs_btree_cur *cur, uint64_t new_owner,
399 struct list_head *buffer_list);
400
401 /*
402 * btree block CRC helpers
403 */
404 void xfs_btree_lblock_calc_crc(struct xfs_buf *);
405 bool xfs_btree_lblock_verify_crc(struct xfs_buf *);
406 void xfs_btree_sblock_calc_crc(struct xfs_buf *);
407 bool xfs_btree_sblock_verify_crc(struct xfs_buf *);
408
409 /*
410 * Internal btree helpers also used by xfs_bmap.c.
411 */
412 void xfs_btree_log_block(struct xfs_btree_cur *, struct xfs_buf *, int);
413 void xfs_btree_log_recs(struct xfs_btree_cur *, struct xfs_buf *, int, int);
414
415 /*
416 * Helpers.
417 */
xfs_btree_get_numrecs(struct xfs_btree_block * block)418 static inline int xfs_btree_get_numrecs(struct xfs_btree_block *block)
419 {
420 return be16_to_cpu(block->bb_numrecs);
421 }
422
xfs_btree_set_numrecs(struct xfs_btree_block * block,uint16_t numrecs)423 static inline void xfs_btree_set_numrecs(struct xfs_btree_block *block,
424 uint16_t numrecs)
425 {
426 block->bb_numrecs = cpu_to_be16(numrecs);
427 }
428
xfs_btree_get_level(struct xfs_btree_block * block)429 static inline int xfs_btree_get_level(struct xfs_btree_block *block)
430 {
431 return be16_to_cpu(block->bb_level);
432 }
433
434
435 /*
436 * Min and max functions for extlen, agblock, fileoff, and filblks types.
437 */
438 #define XFS_EXTLEN_MIN(a,b) min_t(xfs_extlen_t, (a), (b))
439 #define XFS_EXTLEN_MAX(a,b) max_t(xfs_extlen_t, (a), (b))
440 #define XFS_AGBLOCK_MIN(a,b) min_t(xfs_agblock_t, (a), (b))
441 #define XFS_AGBLOCK_MAX(a,b) max_t(xfs_agblock_t, (a), (b))
442 #define XFS_FILEOFF_MIN(a,b) min_t(xfs_fileoff_t, (a), (b))
443 #define XFS_FILEOFF_MAX(a,b) max_t(xfs_fileoff_t, (a), (b))
444 #define XFS_FILBLKS_MIN(a,b) min_t(xfs_filblks_t, (a), (b))
445 #define XFS_FILBLKS_MAX(a,b) max_t(xfs_filblks_t, (a), (b))
446
447 xfs_failaddr_t xfs_btree_sblock_v5hdr_verify(struct xfs_buf *bp);
448 xfs_failaddr_t xfs_btree_sblock_verify(struct xfs_buf *bp,
449 unsigned int max_recs);
450 xfs_failaddr_t xfs_btree_lblock_v5hdr_verify(struct xfs_buf *bp,
451 uint64_t owner);
452 xfs_failaddr_t xfs_btree_lblock_verify(struct xfs_buf *bp,
453 unsigned int max_recs);
454
455 uint xfs_btree_compute_maxlevels(uint *limits, unsigned long len);
456 unsigned long long xfs_btree_calc_size(uint *limits, unsigned long long len);
457
458 /*
459 * Return codes for the query range iterator function are 0 to continue
460 * iterating, and non-zero to stop iterating. Any non-zero value will be
461 * passed up to the _query_range caller. The special value -ECANCELED can be
462 * used to stop iteration, because _query_range never generates that error
463 * code on its own.
464 */
465 typedef int (*xfs_btree_query_range_fn)(struct xfs_btree_cur *cur,
466 union xfs_btree_rec *rec, void *priv);
467
468 int xfs_btree_query_range(struct xfs_btree_cur *cur,
469 union xfs_btree_irec *low_rec, union xfs_btree_irec *high_rec,
470 xfs_btree_query_range_fn fn, void *priv);
471 int xfs_btree_query_all(struct xfs_btree_cur *cur, xfs_btree_query_range_fn fn,
472 void *priv);
473
474 typedef int (*xfs_btree_visit_blocks_fn)(struct xfs_btree_cur *cur, int level,
475 void *data);
476 /* Visit record blocks. */
477 #define XFS_BTREE_VISIT_RECORDS (1 << 0)
478 /* Visit leaf blocks. */
479 #define XFS_BTREE_VISIT_LEAVES (1 << 1)
480 /* Visit all blocks. */
481 #define XFS_BTREE_VISIT_ALL (XFS_BTREE_VISIT_RECORDS | \
482 XFS_BTREE_VISIT_LEAVES)
483 int xfs_btree_visit_blocks(struct xfs_btree_cur *cur,
484 xfs_btree_visit_blocks_fn fn, unsigned int flags, void *data);
485
486 int xfs_btree_count_blocks(struct xfs_btree_cur *cur, xfs_extlen_t *blocks);
487
488 union xfs_btree_rec *xfs_btree_rec_addr(struct xfs_btree_cur *cur, int n,
489 struct xfs_btree_block *block);
490 union xfs_btree_key *xfs_btree_key_addr(struct xfs_btree_cur *cur, int n,
491 struct xfs_btree_block *block);
492 union xfs_btree_key *xfs_btree_high_key_addr(struct xfs_btree_cur *cur, int n,
493 struct xfs_btree_block *block);
494 union xfs_btree_ptr *xfs_btree_ptr_addr(struct xfs_btree_cur *cur, int n,
495 struct xfs_btree_block *block);
496 int xfs_btree_lookup_get_block(struct xfs_btree_cur *cur, int level,
497 union xfs_btree_ptr *pp, struct xfs_btree_block **blkp);
498 struct xfs_btree_block *xfs_btree_get_block(struct xfs_btree_cur *cur,
499 int level, struct xfs_buf **bpp);
500 bool xfs_btree_ptr_is_null(struct xfs_btree_cur *cur, union xfs_btree_ptr *ptr);
501 int64_t xfs_btree_diff_two_ptrs(struct xfs_btree_cur *cur,
502 const union xfs_btree_ptr *a,
503 const union xfs_btree_ptr *b);
504 void xfs_btree_get_sibling(struct xfs_btree_cur *cur,
505 struct xfs_btree_block *block,
506 union xfs_btree_ptr *ptr, int lr);
507 void xfs_btree_get_keys(struct xfs_btree_cur *cur,
508 struct xfs_btree_block *block, union xfs_btree_key *key);
509 union xfs_btree_key *xfs_btree_high_key_from_key(struct xfs_btree_cur *cur,
510 union xfs_btree_key *key);
511 int xfs_btree_has_record(struct xfs_btree_cur *cur, union xfs_btree_irec *low,
512 union xfs_btree_irec *high, bool *exists);
513 bool xfs_btree_has_more_records(struct xfs_btree_cur *cur);
514 struct xfs_ifork *xfs_btree_ifork_ptr(struct xfs_btree_cur *cur);
515
516 /* Does this cursor point to the last block in the given level? */
517 static inline bool
xfs_btree_islastblock(xfs_btree_cur_t * cur,int level)518 xfs_btree_islastblock(
519 xfs_btree_cur_t *cur,
520 int level)
521 {
522 struct xfs_btree_block *block;
523 struct xfs_buf *bp;
524
525 block = xfs_btree_get_block(cur, level, &bp);
526 ASSERT(block && xfs_btree_check_block(cur, block, level, bp) == 0);
527
528 if (cur->bc_flags & XFS_BTREE_LONG_PTRS)
529 return block->bb_u.l.bb_rightsib == cpu_to_be64(NULLFSBLOCK);
530 return block->bb_u.s.bb_rightsib == cpu_to_be32(NULLAGBLOCK);
531 }
532
533 void xfs_btree_set_ptr_null(struct xfs_btree_cur *cur,
534 union xfs_btree_ptr *ptr);
535 int xfs_btree_get_buf_block(struct xfs_btree_cur *cur, union xfs_btree_ptr *ptr,
536 struct xfs_btree_block **block, struct xfs_buf **bpp);
537 void xfs_btree_set_sibling(struct xfs_btree_cur *cur,
538 struct xfs_btree_block *block, union xfs_btree_ptr *ptr,
539 int lr);
540 void xfs_btree_init_block_cur(struct xfs_btree_cur *cur,
541 struct xfs_buf *bp, int level, int numrecs);
542 void xfs_btree_copy_ptrs(struct xfs_btree_cur *cur,
543 union xfs_btree_ptr *dst_ptr,
544 const union xfs_btree_ptr *src_ptr, int numptrs);
545 void xfs_btree_copy_keys(struct xfs_btree_cur *cur,
546 union xfs_btree_key *dst_key, union xfs_btree_key *src_key,
547 int numkeys);
548
549 #endif /* __XFS_BTREE_H__ */
550