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8#include "xfs.h"
9#include "xfs_fs.h"
10#include "xfs_shared.h"
11#include "xfs_format.h"
12#include "xfs_trans_resv.h"
13#include "xfs_bit.h"
14#include "xfs_sb.h"
15#include "xfs_mount.h"
16#include "xfs_btree.h"
17#include "xfs_alloc_btree.h"
18#include "xfs_rmap_btree.h"
19#include "xfs_alloc.h"
20#include "xfs_ialloc.h"
21#include "xfs_rmap.h"
22#include "xfs_ag.h"
23#include "xfs_ag_resv.h"
24#include "xfs_health.h"
25
26static struct xfs_buf *
27xfs_get_aghdr_buf(
28 struct xfs_mount *mp,
29 xfs_daddr_t blkno,
30 size_t numblks,
31 int flags,
32 const struct xfs_buf_ops *ops)
33{
34 struct xfs_buf *bp;
35
36 bp = xfs_buf_get_uncached(mp->m_ddev_targp, numblks, flags);
37 if (!bp)
38 return NULL;
39
40 xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
41 bp->b_bn = blkno;
42 bp->b_maps[0].bm_bn = blkno;
43 bp->b_ops = ops;
44
45 return bp;
46}
47
48static inline bool is_log_ag(struct xfs_mount *mp, struct aghdr_init_data *id)
49{
50 return mp->m_sb.sb_logstart > 0 &&
51 id->agno == XFS_FSB_TO_AGNO(mp, mp->m_sb.sb_logstart);
52}
53
54
55
56
57static void
58xfs_btroot_init(
59 struct xfs_mount *mp,
60 struct xfs_buf *bp,
61 struct aghdr_init_data *id)
62{
63 xfs_btree_init_block(mp, bp, id->type, 0, 0, id->agno);
64}
65
66
67static void
68xfs_freesp_init_recs(
69 struct xfs_mount *mp,
70 struct xfs_buf *bp,
71 struct aghdr_init_data *id)
72{
73 struct xfs_alloc_rec *arec;
74 struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
75
76 arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
77 arec->ar_startblock = cpu_to_be32(mp->m_ag_prealloc_blocks);
78
79 if (is_log_ag(mp, id)) {
80 struct xfs_alloc_rec *nrec;
81 xfs_agblock_t start = XFS_FSB_TO_AGBNO(mp,
82 mp->m_sb.sb_logstart);
83
84 ASSERT(start >= mp->m_ag_prealloc_blocks);
85 if (start != mp->m_ag_prealloc_blocks) {
86
87
88
89 arec->ar_blockcount = cpu_to_be32(start -
90 mp->m_ag_prealloc_blocks);
91 nrec = arec + 1;
92
93
94
95
96
97 nrec->ar_startblock = cpu_to_be32(
98 be32_to_cpu(arec->ar_startblock) +
99 be32_to_cpu(arec->ar_blockcount));
100 arec = nrec;
101 be16_add_cpu(&block->bb_numrecs, 1);
102 }
103
104
105
106 be32_add_cpu(&arec->ar_startblock, mp->m_sb.sb_logblocks);
107 }
108
109
110
111
112
113
114
115 arec->ar_blockcount = cpu_to_be32(id->agsize -
116 be32_to_cpu(arec->ar_startblock));
117 if (!arec->ar_blockcount)
118 block->bb_numrecs = 0;
119}
120
121
122
123
124static void
125xfs_bnoroot_init(
126 struct xfs_mount *mp,
127 struct xfs_buf *bp,
128 struct aghdr_init_data *id)
129{
130 xfs_btree_init_block(mp, bp, XFS_BTNUM_BNO, 0, 1, id->agno);
131 xfs_freesp_init_recs(mp, bp, id);
132}
133
134static void
135xfs_cntroot_init(
136 struct xfs_mount *mp,
137 struct xfs_buf *bp,
138 struct aghdr_init_data *id)
139{
140 xfs_btree_init_block(mp, bp, XFS_BTNUM_CNT, 0, 1, id->agno);
141 xfs_freesp_init_recs(mp, bp, id);
142}
143
144
145
146
147static void
148xfs_rmaproot_init(
149 struct xfs_mount *mp,
150 struct xfs_buf *bp,
151 struct aghdr_init_data *id)
152{
153 struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
154 struct xfs_rmap_rec *rrec;
155
156 xfs_btree_init_block(mp, bp, XFS_BTNUM_RMAP, 0, 4, id->agno);
157
158
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160
161
162
163
164
165
166
167 rrec = XFS_RMAP_REC_ADDR(block, 1);
168 rrec->rm_startblock = 0;
169 rrec->rm_blockcount = cpu_to_be32(XFS_BNO_BLOCK(mp));
170 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_FS);
171 rrec->rm_offset = 0;
172
173
174 rrec = XFS_RMAP_REC_ADDR(block, 2);
175 rrec->rm_startblock = cpu_to_be32(XFS_BNO_BLOCK(mp));
176 rrec->rm_blockcount = cpu_to_be32(2);
177 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG);
178 rrec->rm_offset = 0;
179
180
181 rrec = XFS_RMAP_REC_ADDR(block, 3);
182 rrec->rm_startblock = cpu_to_be32(XFS_IBT_BLOCK(mp));
183 rrec->rm_blockcount = cpu_to_be32(XFS_RMAP_BLOCK(mp) -
184 XFS_IBT_BLOCK(mp));
185 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_INOBT);
186 rrec->rm_offset = 0;
187
188
189 rrec = XFS_RMAP_REC_ADDR(block, 4);
190 rrec->rm_startblock = cpu_to_be32(XFS_RMAP_BLOCK(mp));
191 rrec->rm_blockcount = cpu_to_be32(1);
192 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_AG);
193 rrec->rm_offset = 0;
194
195
196 if (xfs_sb_version_hasreflink(&mp->m_sb)) {
197 rrec = XFS_RMAP_REC_ADDR(block, 5);
198 rrec->rm_startblock = cpu_to_be32(xfs_refc_block(mp));
199 rrec->rm_blockcount = cpu_to_be32(1);
200 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_REFC);
201 rrec->rm_offset = 0;
202 be16_add_cpu(&block->bb_numrecs, 1);
203 }
204
205
206 if (is_log_ag(mp, id)) {
207 rrec = XFS_RMAP_REC_ADDR(block,
208 be16_to_cpu(block->bb_numrecs) + 1);
209 rrec->rm_startblock = cpu_to_be32(
210 XFS_FSB_TO_AGBNO(mp, mp->m_sb.sb_logstart));
211 rrec->rm_blockcount = cpu_to_be32(mp->m_sb.sb_logblocks);
212 rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_LOG);
213 rrec->rm_offset = 0;
214 be16_add_cpu(&block->bb_numrecs, 1);
215 }
216}
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218
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220
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222
223
224
225
226static void
227xfs_sbblock_init(
228 struct xfs_mount *mp,
229 struct xfs_buf *bp,
230 struct aghdr_init_data *id)
231{
232 struct xfs_dsb *dsb = XFS_BUF_TO_SBP(bp);
233
234 xfs_sb_to_disk(dsb, &mp->m_sb);
235 dsb->sb_inprogress = 1;
236}
237
238static void
239xfs_agfblock_init(
240 struct xfs_mount *mp,
241 struct xfs_buf *bp,
242 struct aghdr_init_data *id)
243{
244 struct xfs_agf *agf = XFS_BUF_TO_AGF(bp);
245 xfs_extlen_t tmpsize;
246
247 agf->agf_magicnum = cpu_to_be32(XFS_AGF_MAGIC);
248 agf->agf_versionnum = cpu_to_be32(XFS_AGF_VERSION);
249 agf->agf_seqno = cpu_to_be32(id->agno);
250 agf->agf_length = cpu_to_be32(id->agsize);
251 agf->agf_roots[XFS_BTNUM_BNOi] = cpu_to_be32(XFS_BNO_BLOCK(mp));
252 agf->agf_roots[XFS_BTNUM_CNTi] = cpu_to_be32(XFS_CNT_BLOCK(mp));
253 agf->agf_levels[XFS_BTNUM_BNOi] = cpu_to_be32(1);
254 agf->agf_levels[XFS_BTNUM_CNTi] = cpu_to_be32(1);
255 if (xfs_sb_version_hasrmapbt(&mp->m_sb)) {
256 agf->agf_roots[XFS_BTNUM_RMAPi] =
257 cpu_to_be32(XFS_RMAP_BLOCK(mp));
258 agf->agf_levels[XFS_BTNUM_RMAPi] = cpu_to_be32(1);
259 agf->agf_rmap_blocks = cpu_to_be32(1);
260 }
261
262 agf->agf_flfirst = cpu_to_be32(1);
263 agf->agf_fllast = 0;
264 agf->agf_flcount = 0;
265 tmpsize = id->agsize - mp->m_ag_prealloc_blocks;
266 agf->agf_freeblks = cpu_to_be32(tmpsize);
267 agf->agf_longest = cpu_to_be32(tmpsize);
268 if (xfs_sb_version_hascrc(&mp->m_sb))
269 uuid_copy(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid);
270 if (xfs_sb_version_hasreflink(&mp->m_sb)) {
271 agf->agf_refcount_root = cpu_to_be32(
272 xfs_refc_block(mp));
273 agf->agf_refcount_level = cpu_to_be32(1);
274 agf->agf_refcount_blocks = cpu_to_be32(1);
275 }
276
277 if (is_log_ag(mp, id)) {
278 int64_t logblocks = mp->m_sb.sb_logblocks;
279
280 be32_add_cpu(&agf->agf_freeblks, -logblocks);
281 agf->agf_longest = cpu_to_be32(id->agsize -
282 XFS_FSB_TO_AGBNO(mp, mp->m_sb.sb_logstart) - logblocks);
283 }
284}
285
286static void
287xfs_agflblock_init(
288 struct xfs_mount *mp,
289 struct xfs_buf *bp,
290 struct aghdr_init_data *id)
291{
292 struct xfs_agfl *agfl = XFS_BUF_TO_AGFL(bp);
293 __be32 *agfl_bno;
294 int bucket;
295
296 if (xfs_sb_version_hascrc(&mp->m_sb)) {
297 agfl->agfl_magicnum = cpu_to_be32(XFS_AGFL_MAGIC);
298 agfl->agfl_seqno = cpu_to_be32(id->agno);
299 uuid_copy(&agfl->agfl_uuid, &mp->m_sb.sb_meta_uuid);
300 }
301
302 agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, bp);
303 for (bucket = 0; bucket < xfs_agfl_size(mp); bucket++)
304 agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK);
305}
306
307static void
308xfs_agiblock_init(
309 struct xfs_mount *mp,
310 struct xfs_buf *bp,
311 struct aghdr_init_data *id)
312{
313 struct xfs_agi *agi = XFS_BUF_TO_AGI(bp);
314 int bucket;
315
316 agi->agi_magicnum = cpu_to_be32(XFS_AGI_MAGIC);
317 agi->agi_versionnum = cpu_to_be32(XFS_AGI_VERSION);
318 agi->agi_seqno = cpu_to_be32(id->agno);
319 agi->agi_length = cpu_to_be32(id->agsize);
320 agi->agi_count = 0;
321 agi->agi_root = cpu_to_be32(XFS_IBT_BLOCK(mp));
322 agi->agi_level = cpu_to_be32(1);
323 agi->agi_freecount = 0;
324 agi->agi_newino = cpu_to_be32(NULLAGINO);
325 agi->agi_dirino = cpu_to_be32(NULLAGINO);
326 if (xfs_sb_version_hascrc(&mp->m_sb))
327 uuid_copy(&agi->agi_uuid, &mp->m_sb.sb_meta_uuid);
328 if (xfs_sb_version_hasfinobt(&mp->m_sb)) {
329 agi->agi_free_root = cpu_to_be32(XFS_FIBT_BLOCK(mp));
330 agi->agi_free_level = cpu_to_be32(1);
331 }
332 for (bucket = 0; bucket < XFS_AGI_UNLINKED_BUCKETS; bucket++)
333 agi->agi_unlinked[bucket] = cpu_to_be32(NULLAGINO);
334}
335
336typedef void (*aghdr_init_work_f)(struct xfs_mount *mp, struct xfs_buf *bp,
337 struct aghdr_init_data *id);
338static int
339xfs_ag_init_hdr(
340 struct xfs_mount *mp,
341 struct aghdr_init_data *id,
342 aghdr_init_work_f work,
343 const struct xfs_buf_ops *ops)
344
345{
346 struct xfs_buf *bp;
347
348 bp = xfs_get_aghdr_buf(mp, id->daddr, id->numblks, 0, ops);
349 if (!bp)
350 return -ENOMEM;
351
352 (*work)(mp, bp, id);
353
354 xfs_buf_delwri_queue(bp, &id->buffer_list);
355 xfs_buf_relse(bp);
356 return 0;
357}
358
359struct xfs_aghdr_grow_data {
360 xfs_daddr_t daddr;
361 size_t numblks;
362 const struct xfs_buf_ops *ops;
363 aghdr_init_work_f work;
364 xfs_btnum_t type;
365 bool need_init;
366};
367
368
369
370
371
372
373
374
375
376
377
378int
379xfs_ag_init_headers(
380 struct xfs_mount *mp,
381 struct aghdr_init_data *id)
382
383{
384 struct xfs_aghdr_grow_data aghdr_data[] = {
385 {
386 .daddr = XFS_AG_DADDR(mp, id->agno, XFS_SB_DADDR),
387 .numblks = XFS_FSS_TO_BB(mp, 1),
388 .ops = &xfs_sb_buf_ops,
389 .work = &xfs_sbblock_init,
390 .need_init = true
391 },
392 {
393 .daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGF_DADDR(mp)),
394 .numblks = XFS_FSS_TO_BB(mp, 1),
395 .ops = &xfs_agf_buf_ops,
396 .work = &xfs_agfblock_init,
397 .need_init = true
398 },
399 {
400 .daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGFL_DADDR(mp)),
401 .numblks = XFS_FSS_TO_BB(mp, 1),
402 .ops = &xfs_agfl_buf_ops,
403 .work = &xfs_agflblock_init,
404 .need_init = true
405 },
406 {
407 .daddr = XFS_AG_DADDR(mp, id->agno, XFS_AGI_DADDR(mp)),
408 .numblks = XFS_FSS_TO_BB(mp, 1),
409 .ops = &xfs_agi_buf_ops,
410 .work = &xfs_agiblock_init,
411 .need_init = true
412 },
413 {
414 .daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_BNO_BLOCK(mp)),
415 .numblks = BTOBB(mp->m_sb.sb_blocksize),
416 .ops = &xfs_bnobt_buf_ops,
417 .work = &xfs_bnoroot_init,
418 .need_init = true
419 },
420 {
421 .daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_CNT_BLOCK(mp)),
422 .numblks = BTOBB(mp->m_sb.sb_blocksize),
423 .ops = &xfs_cntbt_buf_ops,
424 .work = &xfs_cntroot_init,
425 .need_init = true
426 },
427 {
428 .daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_IBT_BLOCK(mp)),
429 .numblks = BTOBB(mp->m_sb.sb_blocksize),
430 .ops = &xfs_inobt_buf_ops,
431 .work = &xfs_btroot_init,
432 .type = XFS_BTNUM_INO,
433 .need_init = true
434 },
435 {
436 .daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_FIBT_BLOCK(mp)),
437 .numblks = BTOBB(mp->m_sb.sb_blocksize),
438 .ops = &xfs_finobt_buf_ops,
439 .work = &xfs_btroot_init,
440 .type = XFS_BTNUM_FINO,
441 .need_init = xfs_sb_version_hasfinobt(&mp->m_sb)
442 },
443 {
444 .daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_RMAP_BLOCK(mp)),
445 .numblks = BTOBB(mp->m_sb.sb_blocksize),
446 .ops = &xfs_rmapbt_buf_ops,
447 .work = &xfs_rmaproot_init,
448 .need_init = xfs_sb_version_hasrmapbt(&mp->m_sb)
449 },
450 {
451 .daddr = XFS_AGB_TO_DADDR(mp, id->agno, xfs_refc_block(mp)),
452 .numblks = BTOBB(mp->m_sb.sb_blocksize),
453 .ops = &xfs_refcountbt_buf_ops,
454 .work = &xfs_btroot_init,
455 .type = XFS_BTNUM_REFC,
456 .need_init = xfs_sb_version_hasreflink(&mp->m_sb)
457 },
458 {
459 .daddr = XFS_BUF_DADDR_NULL,
460 }
461 };
462 struct xfs_aghdr_grow_data *dp;
463 int error = 0;
464
465
466 id->nfree += id->agsize - mp->m_ag_prealloc_blocks;
467 for (dp = &aghdr_data[0]; dp->daddr != XFS_BUF_DADDR_NULL; dp++) {
468 if (!dp->need_init)
469 continue;
470
471 id->daddr = dp->daddr;
472 id->numblks = dp->numblks;
473 id->type = dp->type;
474 error = xfs_ag_init_hdr(mp, id, dp->work, dp->ops);
475 if (error)
476 break;
477 }
478 return error;
479}
480
481
482
483
484int
485xfs_ag_extend_space(
486 struct xfs_mount *mp,
487 struct xfs_trans *tp,
488 struct aghdr_init_data *id,
489 xfs_extlen_t len)
490{
491 struct xfs_buf *bp;
492 struct xfs_agi *agi;
493 struct xfs_agf *agf;
494 int error;
495
496
497
498
499 error = xfs_ialloc_read_agi(mp, tp, id->agno, &bp);
500 if (error)
501 return error;
502
503 agi = XFS_BUF_TO_AGI(bp);
504 be32_add_cpu(&agi->agi_length, len);
505 ASSERT(id->agno == mp->m_sb.sb_agcount - 1 ||
506 be32_to_cpu(agi->agi_length) == mp->m_sb.sb_agblocks);
507 xfs_ialloc_log_agi(tp, bp, XFS_AGI_LENGTH);
508
509
510
511
512 error = xfs_alloc_read_agf(mp, tp, id->agno, 0, &bp);
513 if (error)
514 return error;
515
516 agf = XFS_BUF_TO_AGF(bp);
517 be32_add_cpu(&agf->agf_length, len);
518 ASSERT(agf->agf_length == agi->agi_length);
519 xfs_alloc_log_agf(tp, bp, XFS_AGF_LENGTH);
520
521
522
523
524
525
526
527 error = xfs_rmap_free(tp, bp, id->agno,
528 be32_to_cpu(agf->agf_length) - len,
529 len, &XFS_RMAP_OINFO_SKIP_UPDATE);
530 if (error)
531 return error;
532
533 return xfs_free_extent(tp, XFS_AGB_TO_FSB(mp, id->agno,
534 be32_to_cpu(agf->agf_length) - len),
535 len, &XFS_RMAP_OINFO_SKIP_UPDATE,
536 XFS_AG_RESV_NONE);
537}
538
539
540int
541xfs_ag_get_geometry(
542 struct xfs_mount *mp,
543 xfs_agnumber_t agno,
544 struct xfs_ag_geometry *ageo)
545{
546 struct xfs_buf *agi_bp;
547 struct xfs_buf *agf_bp;
548 struct xfs_agi *agi;
549 struct xfs_agf *agf;
550 struct xfs_perag *pag;
551 unsigned int freeblks;
552 int error;
553
554 if (agno >= mp->m_sb.sb_agcount)
555 return -EINVAL;
556
557
558 error = xfs_ialloc_read_agi(mp, NULL, agno, &agi_bp);
559 if (error)
560 return error;
561 error = xfs_alloc_read_agf(mp, NULL, agno, 0, &agf_bp);
562 if (error)
563 goto out_agi;
564 pag = xfs_perag_get(mp, agno);
565
566
567 memset(ageo, 0, sizeof(*ageo));
568 ageo->ag_number = agno;
569
570 agi = XFS_BUF_TO_AGI(agi_bp);
571 ageo->ag_icount = be32_to_cpu(agi->agi_count);
572 ageo->ag_ifree = be32_to_cpu(agi->agi_freecount);
573
574 agf = XFS_BUF_TO_AGF(agf_bp);
575 ageo->ag_length = be32_to_cpu(agf->agf_length);
576 freeblks = pag->pagf_freeblks +
577 pag->pagf_flcount +
578 pag->pagf_btreeblks -
579 xfs_ag_resv_needed(pag, XFS_AG_RESV_NONE);
580 ageo->ag_freeblks = freeblks;
581 xfs_ag_geom_health(pag, ageo);
582
583
584 xfs_perag_put(pag);
585 xfs_buf_relse(agf_bp);
586out_agi:
587 xfs_buf_relse(agi_bp);
588 return error;
589}
590