Line data Source code
1 : // SPDX-License-Identifier: GPL-2.0
2 : /*
3 : * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
4 : * All Rights Reserved.
5 : */
6 : #include "xfs.h"
7 : #include "xfs_fs.h"
8 : #include "xfs_shared.h"
9 : #include "xfs_format.h"
10 : #include "xfs_log_format.h"
11 : #include "xfs_trans_resv.h"
12 : #include "xfs_mount.h"
13 : #include "xfs_btree.h"
14 : #include "xfs_btree_staging.h"
15 : #include "xfs_alloc_btree.h"
16 : #include "xfs_alloc.h"
17 : #include "xfs_extent_busy.h"
18 : #include "xfs_error.h"
19 : #include "xfs_trace.h"
20 : #include "xfs_trans.h"
21 : #include "xfs_ag.h"
22 :
23 : static struct kmem_cache *xfs_allocbt_cur_cache;
24 :
25 : STATIC struct xfs_btree_cur *
26 2518402 : xfs_allocbt_dup_cursor(
27 : struct xfs_btree_cur *cur)
28 : {
29 2518402 : return xfs_allocbt_init_cursor(cur->bc_mp, cur->bc_tp,
30 : cur->bc_ag.agbp, cur->bc_ag.pag, cur->bc_btnum);
31 : }
32 :
33 : STATIC void
34 16134 : xfs_allocbt_set_root(
35 : struct xfs_btree_cur *cur,
36 : const union xfs_btree_ptr *ptr,
37 : int inc)
38 : {
39 16134 : struct xfs_buf *agbp = cur->bc_ag.agbp;
40 16134 : struct xfs_agf *agf = agbp->b_addr;
41 16134 : int btnum = cur->bc_btnum;
42 :
43 16134 : ASSERT(ptr->s != 0);
44 :
45 16134 : agf->agf_roots[btnum] = ptr->s;
46 16134 : be32_add_cpu(&agf->agf_levels[btnum], inc);
47 16134 : cur->bc_ag.pag->pagf_levels[btnum] += inc;
48 :
49 16134 : xfs_alloc_log_agf(cur->bc_tp, agbp, XFS_AGF_ROOTS | XFS_AGF_LEVELS);
50 16134 : }
51 :
52 : STATIC int
53 40940 : xfs_allocbt_alloc_block(
54 : struct xfs_btree_cur *cur,
55 : const union xfs_btree_ptr *start,
56 : union xfs_btree_ptr *new,
57 : int *stat)
58 : {
59 40940 : int error;
60 40940 : xfs_agblock_t bno;
61 :
62 : /* Allocate the new block from the freelist. If we can't, give up. */
63 40940 : error = xfs_alloc_get_freelist(cur->bc_ag.pag, cur->bc_tp,
64 : cur->bc_ag.agbp, &bno, 1);
65 40940 : if (error)
66 : return error;
67 :
68 40940 : if (bno == NULLAGBLOCK) {
69 0 : *stat = 0;
70 0 : return 0;
71 : }
72 :
73 40940 : atomic64_inc(&cur->bc_mp->m_allocbt_blks);
74 40940 : xfs_extent_busy_reuse(cur->bc_mp, cur->bc_ag.pag, bno, 1, false);
75 :
76 40940 : new->s = cpu_to_be32(bno);
77 :
78 40940 : *stat = 1;
79 40940 : return 0;
80 : }
81 :
82 : STATIC int
83 20186 : xfs_allocbt_free_block(
84 : struct xfs_btree_cur *cur,
85 : struct xfs_buf *bp)
86 : {
87 20186 : struct xfs_buf *agbp = cur->bc_ag.agbp;
88 20186 : xfs_agblock_t bno;
89 20186 : int error;
90 :
91 20186 : bno = xfs_daddr_to_agbno(cur->bc_mp, xfs_buf_daddr(bp));
92 20186 : error = xfs_alloc_put_freelist(cur->bc_ag.pag, cur->bc_tp, agbp, NULL,
93 : bno, 1);
94 20186 : if (error)
95 : return error;
96 :
97 20186 : atomic64_dec(&cur->bc_mp->m_allocbt_blks);
98 20186 : xfs_extent_busy_insert(cur->bc_tp, agbp->b_pag, bno, 1,
99 : XFS_EXTENT_BUSY_SKIP_DISCARD);
100 20186 : return 0;
101 : }
102 :
103 : /*
104 : * Update the longest extent in the AGF
105 : */
106 : STATIC void
107 134013603 : xfs_allocbt_update_lastrec(
108 : struct xfs_btree_cur *cur,
109 : const struct xfs_btree_block *block,
110 : const union xfs_btree_rec *rec,
111 : int ptr,
112 : int reason)
113 : {
114 134013603 : struct xfs_agf *agf = cur->bc_ag.agbp->b_addr;
115 134013603 : struct xfs_perag *pag;
116 134013603 : __be32 len;
117 134013603 : int numrecs;
118 :
119 134013603 : ASSERT(cur->bc_btnum == XFS_BTNUM_CNT);
120 :
121 134013603 : switch (reason) {
122 0 : case LASTREC_UPDATE:
123 : /*
124 : * If this is the last leaf block and it's the last record,
125 : * then update the size of the longest extent in the AG.
126 : */
127 0 : if (ptr != xfs_btree_get_numrecs(block))
128 : return;
129 0 : len = rec->alloc.ar_blockcount;
130 0 : break;
131 69238706 : case LASTREC_INSREC:
132 138477412 : if (be32_to_cpu(rec->alloc.ar_blockcount) <=
133 69238706 : be32_to_cpu(agf->agf_longest))
134 : return;
135 : len = rec->alloc.ar_blockcount;
136 : break;
137 64774897 : case LASTREC_DELREC:
138 64774897 : numrecs = xfs_btree_get_numrecs(block);
139 64774897 : if (ptr <= numrecs)
140 : return;
141 10454219 : ASSERT(ptr == numrecs + 1);
142 :
143 10454219 : if (numrecs) {
144 7472951 : xfs_alloc_rec_t *rrp;
145 :
146 7472951 : rrp = XFS_ALLOC_REC_ADDR(cur->bc_mp, block, numrecs);
147 7472951 : len = rrp->ar_blockcount;
148 : } else {
149 : len = 0;
150 : }
151 :
152 : break;
153 0 : default:
154 0 : ASSERT(0);
155 0 : return;
156 : }
157 :
158 21002460 : agf->agf_longest = len;
159 21002460 : pag = cur->bc_ag.agbp->b_pag;
160 21002460 : pag->pagf_longest = be32_to_cpu(len);
161 21002460 : xfs_alloc_log_agf(cur->bc_tp, cur->bc_ag.agbp, XFS_AGF_LONGEST);
162 : }
163 :
164 : STATIC int
165 22925389 : xfs_allocbt_get_minrecs(
166 : struct xfs_btree_cur *cur,
167 : int level)
168 : {
169 22925389 : return cur->bc_mp->m_alloc_mnr[level != 0];
170 : }
171 :
172 : STATIC int
173 14247875649 : xfs_allocbt_get_maxrecs(
174 : struct xfs_btree_cur *cur,
175 : int level)
176 : {
177 14247875649 : return cur->bc_mp->m_alloc_mxr[level != 0];
178 : }
179 :
180 : STATIC void
181 22117794460 : xfs_allocbt_init_key_from_rec(
182 : union xfs_btree_key *key,
183 : const union xfs_btree_rec *rec)
184 : {
185 22117794460 : key->alloc.ar_startblock = rec->alloc.ar_startblock;
186 22117794460 : key->alloc.ar_blockcount = rec->alloc.ar_blockcount;
187 22117794460 : }
188 :
189 : STATIC void
190 1330271073 : xfs_bnobt_init_high_key_from_rec(
191 : union xfs_btree_key *key,
192 : const union xfs_btree_rec *rec)
193 : {
194 1330271073 : __u32 x;
195 :
196 1330271073 : x = be32_to_cpu(rec->alloc.ar_startblock);
197 1330271073 : x += be32_to_cpu(rec->alloc.ar_blockcount) - 1;
198 1330271073 : key->alloc.ar_startblock = cpu_to_be32(x);
199 1330271073 : key->alloc.ar_blockcount = 0;
200 1330271073 : }
201 :
202 : STATIC void
203 0 : xfs_cntbt_init_high_key_from_rec(
204 : union xfs_btree_key *key,
205 : const union xfs_btree_rec *rec)
206 : {
207 0 : key->alloc.ar_blockcount = rec->alloc.ar_blockcount;
208 0 : key->alloc.ar_startblock = 0;
209 0 : }
210 :
211 : STATIC void
212 5414833801 : xfs_allocbt_init_rec_from_cur(
213 : struct xfs_btree_cur *cur,
214 : union xfs_btree_rec *rec)
215 : {
216 5414833801 : rec->alloc.ar_startblock = cpu_to_be32(cur->bc_rec.a.ar_startblock);
217 5414833801 : rec->alloc.ar_blockcount = cpu_to_be32(cur->bc_rec.a.ar_blockcount);
218 5414833801 : }
219 :
220 : STATIC void
221 2027242679 : xfs_allocbt_init_ptr_from_cur(
222 : struct xfs_btree_cur *cur,
223 : union xfs_btree_ptr *ptr)
224 : {
225 2027242679 : struct xfs_agf *agf = cur->bc_ag.agbp->b_addr;
226 :
227 4054485358 : ASSERT(cur->bc_ag.pag->pag_agno == be32_to_cpu(agf->agf_seqno));
228 :
229 2027242679 : ptr->s = agf->agf_roots[cur->bc_btnum];
230 2027207968 : }
231 :
232 : STATIC int64_t
233 14460631196 : xfs_bnobt_key_diff(
234 : struct xfs_btree_cur *cur,
235 : const union xfs_btree_key *key)
236 : {
237 14460631196 : struct xfs_alloc_rec_incore *rec = &cur->bc_rec.a;
238 14460631196 : const struct xfs_alloc_rec *kp = &key->alloc;
239 :
240 14460631196 : return (int64_t)be32_to_cpu(kp->ar_startblock) - rec->ar_startblock;
241 : }
242 :
243 : STATIC int64_t
244 3904287975 : xfs_cntbt_key_diff(
245 : struct xfs_btree_cur *cur,
246 : const union xfs_btree_key *key)
247 : {
248 3904287975 : struct xfs_alloc_rec_incore *rec = &cur->bc_rec.a;
249 3904287975 : const struct xfs_alloc_rec *kp = &key->alloc;
250 3904287975 : int64_t diff;
251 :
252 3904287975 : diff = (int64_t)be32_to_cpu(kp->ar_blockcount) - rec->ar_blockcount;
253 3904287975 : if (diff)
254 : return diff;
255 :
256 2111549017 : return (int64_t)be32_to_cpu(kp->ar_startblock) - rec->ar_startblock;
257 : }
258 :
259 : STATIC int64_t
260 5107379474 : xfs_bnobt_diff_two_keys(
261 : struct xfs_btree_cur *cur,
262 : const union xfs_btree_key *k1,
263 : const union xfs_btree_key *k2,
264 : const union xfs_btree_key *mask)
265 : {
266 5107379474 : ASSERT(!mask || mask->alloc.ar_startblock);
267 :
268 5107379474 : return (int64_t)be32_to_cpu(k1->alloc.ar_startblock) -
269 5107379474 : be32_to_cpu(k2->alloc.ar_startblock);
270 : }
271 :
272 : STATIC int64_t
273 116711549 : xfs_cntbt_diff_two_keys(
274 : struct xfs_btree_cur *cur,
275 : const union xfs_btree_key *k1,
276 : const union xfs_btree_key *k2,
277 : const union xfs_btree_key *mask)
278 : {
279 116711549 : int64_t diff;
280 :
281 116711549 : ASSERT(!mask || (mask->alloc.ar_blockcount &&
282 : mask->alloc.ar_startblock));
283 :
284 116711549 : diff = be32_to_cpu(k1->alloc.ar_blockcount) -
285 116711549 : be32_to_cpu(k2->alloc.ar_blockcount);
286 116711549 : if (diff)
287 : return diff;
288 :
289 171706568 : return be32_to_cpu(k1->alloc.ar_startblock) -
290 85853284 : be32_to_cpu(k2->alloc.ar_startblock);
291 : }
292 :
293 : static xfs_failaddr_t
294 6592514 : xfs_allocbt_verify(
295 : struct xfs_buf *bp)
296 : {
297 6592514 : struct xfs_mount *mp = bp->b_mount;
298 6592514 : struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
299 6592514 : struct xfs_perag *pag = bp->b_pag;
300 6592514 : xfs_failaddr_t fa;
301 6592514 : unsigned int level;
302 6592514 : xfs_btnum_t btnum = XFS_BTNUM_BNOi;
303 :
304 6592514 : if (!xfs_verify_magic(bp, block->bb_magic))
305 0 : return __this_address;
306 :
307 6592499 : if (xfs_has_crc(mp)) {
308 6587871 : fa = xfs_btree_sblock_v5hdr_verify(bp);
309 6587857 : if (fa)
310 : return fa;
311 : }
312 :
313 : /*
314 : * The perag may not be attached during grow operations or fully
315 : * initialized from the AGF during log recovery. Therefore we can only
316 : * check against maximum tree depth from those contexts.
317 : *
318 : * Otherwise check against the per-tree limit. Peek at one of the
319 : * verifier magic values to determine the type of tree we're verifying
320 : * against.
321 : */
322 6592489 : level = be16_to_cpu(block->bb_level);
323 6592489 : if (bp->b_ops->magic[0] == cpu_to_be32(XFS_ABTC_MAGIC))
324 3402690 : btnum = XFS_BTNUM_CNTi;
325 13169664 : if (pag && xfs_perag_initialised_agf(pag)) {
326 4531853 : if (level >= pag->pagf_levels[btnum])
327 0 : return __this_address;
328 2060637 : } else if (level >= mp->m_alloc_maxlevels)
329 0 : return __this_address;
330 :
331 6592472 : return xfs_btree_sblock_verify(bp, mp->m_alloc_mxr[level != 0]);
332 : }
333 :
334 : static void
335 446022 : xfs_allocbt_read_verify(
336 : struct xfs_buf *bp)
337 : {
338 446022 : xfs_failaddr_t fa;
339 :
340 446022 : if (!xfs_btree_sblock_verify_crc(bp))
341 256 : xfs_verifier_error(bp, -EFSBADCRC, __this_address);
342 : else {
343 445766 : fa = xfs_allocbt_verify(bp);
344 445766 : if (fa)
345 0 : xfs_verifier_error(bp, -EFSCORRUPTED, fa);
346 : }
347 :
348 446022 : if (bp->b_error)
349 256 : trace_xfs_btree_corrupt(bp, _RET_IP_);
350 446022 : }
351 :
352 : static void
353 2883581 : xfs_allocbt_write_verify(
354 : struct xfs_buf *bp)
355 : {
356 2883581 : xfs_failaddr_t fa;
357 :
358 2883581 : fa = xfs_allocbt_verify(bp);
359 2883581 : if (fa) {
360 0 : trace_xfs_btree_corrupt(bp, _RET_IP_);
361 0 : xfs_verifier_error(bp, -EFSCORRUPTED, fa);
362 0 : return;
363 : }
364 2883581 : xfs_btree_sblock_calc_crc(bp);
365 :
366 : }
367 :
368 : const struct xfs_buf_ops xfs_bnobt_buf_ops = {
369 : .name = "xfs_bnobt",
370 : .magic = { cpu_to_be32(XFS_ABTB_MAGIC),
371 : cpu_to_be32(XFS_ABTB_CRC_MAGIC) },
372 : .verify_read = xfs_allocbt_read_verify,
373 : .verify_write = xfs_allocbt_write_verify,
374 : .verify_struct = xfs_allocbt_verify,
375 : };
376 :
377 : const struct xfs_buf_ops xfs_cntbt_buf_ops = {
378 : .name = "xfs_cntbt",
379 : .magic = { cpu_to_be32(XFS_ABTC_MAGIC),
380 : cpu_to_be32(XFS_ABTC_CRC_MAGIC) },
381 : .verify_read = xfs_allocbt_read_verify,
382 : .verify_write = xfs_allocbt_write_verify,
383 : .verify_struct = xfs_allocbt_verify,
384 : };
385 :
386 : STATIC int
387 268222 : xfs_bnobt_keys_inorder(
388 : struct xfs_btree_cur *cur,
389 : const union xfs_btree_key *k1,
390 : const union xfs_btree_key *k2)
391 : {
392 268222 : return be32_to_cpu(k1->alloc.ar_startblock) <
393 268222 : be32_to_cpu(k2->alloc.ar_startblock);
394 : }
395 :
396 : STATIC int
397 169548509 : xfs_bnobt_recs_inorder(
398 : struct xfs_btree_cur *cur,
399 : const union xfs_btree_rec *r1,
400 : const union xfs_btree_rec *r2)
401 : {
402 169548509 : return be32_to_cpu(r1->alloc.ar_startblock) +
403 169548509 : be32_to_cpu(r1->alloc.ar_blockcount) <=
404 169548509 : be32_to_cpu(r2->alloc.ar_startblock);
405 : }
406 :
407 : STATIC int
408 269338 : xfs_cntbt_keys_inorder(
409 : struct xfs_btree_cur *cur,
410 : const union xfs_btree_key *k1,
411 : const union xfs_btree_key *k2)
412 : {
413 269338 : return be32_to_cpu(k1->alloc.ar_blockcount) <
414 538676 : be32_to_cpu(k2->alloc.ar_blockcount) ||
415 146560 : (k1->alloc.ar_blockcount == k2->alloc.ar_blockcount &&
416 146560 : be32_to_cpu(k1->alloc.ar_startblock) <
417 146560 : be32_to_cpu(k2->alloc.ar_startblock));
418 : }
419 :
420 : STATIC int
421 255341032 : xfs_cntbt_recs_inorder(
422 : struct xfs_btree_cur *cur,
423 : const union xfs_btree_rec *r1,
424 : const union xfs_btree_rec *r2)
425 : {
426 255341032 : return be32_to_cpu(r1->alloc.ar_blockcount) <
427 510682064 : be32_to_cpu(r2->alloc.ar_blockcount) ||
428 207487166 : (r1->alloc.ar_blockcount == r2->alloc.ar_blockcount &&
429 207487166 : be32_to_cpu(r1->alloc.ar_startblock) <
430 207487166 : be32_to_cpu(r2->alloc.ar_startblock));
431 : }
432 :
433 : STATIC enum xbtree_key_contig
434 0 : xfs_allocbt_keys_contiguous(
435 : struct xfs_btree_cur *cur,
436 : const union xfs_btree_key *key1,
437 : const union xfs_btree_key *key2,
438 : const union xfs_btree_key *mask)
439 : {
440 0 : ASSERT(!mask || mask->alloc.ar_startblock);
441 :
442 0 : return xbtree_key_contig(be32_to_cpu(key1->alloc.ar_startblock),
443 0 : be32_to_cpu(key2->alloc.ar_startblock));
444 : }
445 :
446 : static const struct xfs_btree_ops xfs_bnobt_ops = {
447 : .rec_len = sizeof(xfs_alloc_rec_t),
448 : .key_len = sizeof(xfs_alloc_key_t),
449 :
450 : .dup_cursor = xfs_allocbt_dup_cursor,
451 : .set_root = xfs_allocbt_set_root,
452 : .alloc_block = xfs_allocbt_alloc_block,
453 : .free_block = xfs_allocbt_free_block,
454 : .update_lastrec = xfs_allocbt_update_lastrec,
455 : .get_minrecs = xfs_allocbt_get_minrecs,
456 : .get_maxrecs = xfs_allocbt_get_maxrecs,
457 : .init_key_from_rec = xfs_allocbt_init_key_from_rec,
458 : .init_high_key_from_rec = xfs_bnobt_init_high_key_from_rec,
459 : .init_rec_from_cur = xfs_allocbt_init_rec_from_cur,
460 : .init_ptr_from_cur = xfs_allocbt_init_ptr_from_cur,
461 : .key_diff = xfs_bnobt_key_diff,
462 : .buf_ops = &xfs_bnobt_buf_ops,
463 : .diff_two_keys = xfs_bnobt_diff_two_keys,
464 : .keys_inorder = xfs_bnobt_keys_inorder,
465 : .recs_inorder = xfs_bnobt_recs_inorder,
466 : .keys_contiguous = xfs_allocbt_keys_contiguous,
467 : };
468 :
469 : static const struct xfs_btree_ops xfs_cntbt_ops = {
470 : .rec_len = sizeof(xfs_alloc_rec_t),
471 : .key_len = sizeof(xfs_alloc_key_t),
472 :
473 : .dup_cursor = xfs_allocbt_dup_cursor,
474 : .set_root = xfs_allocbt_set_root,
475 : .alloc_block = xfs_allocbt_alloc_block,
476 : .free_block = xfs_allocbt_free_block,
477 : .update_lastrec = xfs_allocbt_update_lastrec,
478 : .get_minrecs = xfs_allocbt_get_minrecs,
479 : .get_maxrecs = xfs_allocbt_get_maxrecs,
480 : .init_key_from_rec = xfs_allocbt_init_key_from_rec,
481 : .init_high_key_from_rec = xfs_cntbt_init_high_key_from_rec,
482 : .init_rec_from_cur = xfs_allocbt_init_rec_from_cur,
483 : .init_ptr_from_cur = xfs_allocbt_init_ptr_from_cur,
484 : .key_diff = xfs_cntbt_key_diff,
485 : .buf_ops = &xfs_cntbt_buf_ops,
486 : .diff_two_keys = xfs_cntbt_diff_two_keys,
487 : .keys_inorder = xfs_cntbt_keys_inorder,
488 : .recs_inorder = xfs_cntbt_recs_inorder,
489 : .keys_contiguous = NULL, /* not needed right now */
490 : };
491 :
492 : /* Allocate most of a new allocation btree cursor. */
493 : STATIC struct xfs_btree_cur *
494 1271663263 : xfs_allocbt_init_common(
495 : struct xfs_mount *mp,
496 : struct xfs_trans *tp,
497 : struct xfs_perag *pag,
498 : xfs_btnum_t btnum)
499 : {
500 1271663263 : struct xfs_btree_cur *cur;
501 :
502 1271663263 : ASSERT(btnum == XFS_BTNUM_BNO || btnum == XFS_BTNUM_CNT);
503 :
504 1271663263 : cur = xfs_btree_alloc_cursor(mp, tp, btnum, mp->m_alloc_maxlevels,
505 : xfs_allocbt_cur_cache);
506 1271765477 : cur->bc_ag.abt.active = false;
507 :
508 1271765477 : if (btnum == XFS_BTNUM_CNT) {
509 614886759 : cur->bc_ops = &xfs_cntbt_ops;
510 614886759 : cur->bc_statoff = XFS_STATS_CALC_INDEX(xs_abtc_2);
511 614886759 : cur->bc_flags = XFS_BTREE_LASTREC_UPDATE;
512 : } else {
513 656878718 : cur->bc_ops = &xfs_bnobt_ops;
514 656878718 : cur->bc_statoff = XFS_STATS_CALC_INDEX(xs_abtb_2);
515 : }
516 :
517 1271765477 : cur->bc_ag.pag = xfs_perag_hold(pag);
518 :
519 1271647642 : if (xfs_has_crc(mp))
520 1271654478 : cur->bc_flags |= XFS_BTREE_CRC_BLOCKS;
521 :
522 1271647642 : return cur;
523 : }
524 :
525 : /*
526 : * Allocate a new allocation btree cursor.
527 : */
528 : struct xfs_btree_cur * /* new alloc btree cursor */
529 1271631315 : xfs_allocbt_init_cursor(
530 : struct xfs_mount *mp, /* file system mount point */
531 : struct xfs_trans *tp, /* transaction pointer */
532 : struct xfs_buf *agbp, /* buffer for agf structure */
533 : struct xfs_perag *pag,
534 : xfs_btnum_t btnum) /* btree identifier */
535 : {
536 1271631315 : struct xfs_agf *agf = agbp->b_addr;
537 1271631315 : struct xfs_btree_cur *cur;
538 :
539 1271631315 : cur = xfs_allocbt_init_common(mp, tp, pag, btnum);
540 1271716949 : if (btnum == XFS_BTNUM_CNT)
541 614871696 : cur->bc_nlevels = be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]);
542 : else
543 656845253 : cur->bc_nlevels = be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]);
544 :
545 1271716949 : cur->bc_ag.agbp = agbp;
546 :
547 1271716949 : return cur;
548 : }
549 :
550 : /* Create a free space btree cursor with a fake root for staging. */
551 : struct xfs_btree_cur *
552 0 : xfs_allocbt_stage_cursor(
553 : struct xfs_mount *mp,
554 : struct xbtree_afakeroot *afake,
555 : struct xfs_perag *pag,
556 : xfs_btnum_t btnum)
557 : {
558 0 : struct xfs_btree_cur *cur;
559 :
560 0 : cur = xfs_allocbt_init_common(mp, NULL, pag, btnum);
561 0 : xfs_btree_stage_afakeroot(cur, afake);
562 0 : return cur;
563 : }
564 :
565 : /*
566 : * Install a new free space btree root. Caller is responsible for invalidating
567 : * and freeing the old btree blocks.
568 : */
569 : void
570 0 : xfs_allocbt_commit_staged_btree(
571 : struct xfs_btree_cur *cur,
572 : struct xfs_trans *tp,
573 : struct xfs_buf *agbp)
574 : {
575 0 : struct xfs_agf *agf = agbp->b_addr;
576 0 : struct xbtree_afakeroot *afake = cur->bc_ag.afake;
577 :
578 0 : ASSERT(cur->bc_flags & XFS_BTREE_STAGING);
579 :
580 0 : agf->agf_roots[cur->bc_btnum] = cpu_to_be32(afake->af_root);
581 0 : agf->agf_levels[cur->bc_btnum] = cpu_to_be32(afake->af_levels);
582 0 : xfs_alloc_log_agf(tp, agbp, XFS_AGF_ROOTS | XFS_AGF_LEVELS);
583 :
584 0 : if (cur->bc_btnum == XFS_BTNUM_BNO) {
585 0 : xfs_btree_commit_afakeroot(cur, tp, agbp, &xfs_bnobt_ops);
586 : } else {
587 0 : cur->bc_flags |= XFS_BTREE_LASTREC_UPDATE;
588 0 : xfs_btree_commit_afakeroot(cur, tp, agbp, &xfs_cntbt_ops);
589 : }
590 0 : }
591 :
592 : /* Calculate number of records in an alloc btree block. */
593 : static inline unsigned int
594 : xfs_allocbt_block_maxrecs(
595 : unsigned int blocklen,
596 : bool leaf)
597 : {
598 45002 : if (leaf)
599 22501 : return blocklen / sizeof(xfs_alloc_rec_t);
600 22501 : return blocklen / (sizeof(xfs_alloc_key_t) + sizeof(xfs_alloc_ptr_t));
601 : }
602 :
603 : /*
604 : * Calculate number of records in an alloc btree block.
605 : */
606 : int
607 45002 : xfs_allocbt_maxrecs(
608 : struct xfs_mount *mp,
609 : int blocklen,
610 : int leaf)
611 : {
612 45002 : blocklen -= XFS_ALLOC_BLOCK_LEN(mp);
613 45002 : return xfs_allocbt_block_maxrecs(blocklen, leaf);
614 : }
615 :
616 : /* Free space btrees are at their largest when every other block is free. */
617 : #define XFS_MAX_FREESP_RECORDS ((XFS_MAX_AG_BLOCKS + 1) / 2)
618 :
619 : /* Compute the max possible height for free space btrees. */
620 : unsigned int
621 22507 : xfs_allocbt_maxlevels_ondisk(void)
622 : {
623 22507 : unsigned int minrecs[2];
624 22507 : unsigned int blocklen;
625 :
626 22507 : blocklen = min(XFS_MIN_BLOCKSIZE - XFS_BTREE_SBLOCK_LEN,
627 : XFS_MIN_CRC_BLOCKSIZE - XFS_BTREE_SBLOCK_CRC_LEN);
628 :
629 22507 : minrecs[0] = xfs_allocbt_block_maxrecs(blocklen, true) / 2;
630 22507 : minrecs[1] = xfs_allocbt_block_maxrecs(blocklen, false) / 2;
631 :
632 22507 : return xfs_btree_compute_maxlevels(minrecs, XFS_MAX_FREESP_RECORDS);
633 : }
634 :
635 : /* Calculate the freespace btree size for some records. */
636 : xfs_extlen_t
637 3310383 : xfs_allocbt_calc_size(
638 : struct xfs_mount *mp,
639 : unsigned long long len)
640 : {
641 3310383 : return xfs_btree_calc_size(mp->m_alloc_mnr, len);
642 : }
643 :
644 : int __init
645 12 : xfs_allocbt_init_cur_cache(void)
646 : {
647 12 : xfs_allocbt_cur_cache = kmem_cache_create("xfs_bnobt_cur",
648 12 : xfs_btree_cur_sizeof(xfs_allocbt_maxlevels_ondisk()),
649 : 0, 0, NULL);
650 :
651 12 : if (!xfs_allocbt_cur_cache)
652 0 : return -ENOMEM;
653 : return 0;
654 : }
655 :
656 : void
657 12 : xfs_allocbt_destroy_cur_cache(void)
658 : {
659 12 : kmem_cache_destroy(xfs_allocbt_cur_cache);
660 12 : xfs_allocbt_cur_cache = NULL;
661 12 : }
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