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_bit.h"
13 : #include "xfs_mount.h"
14 : #include "xfs_btree.h"
15 : #include "xfs_btree_staging.h"
16 : #include "xfs_ialloc.h"
17 : #include "xfs_ialloc_btree.h"
18 : #include "xfs_alloc.h"
19 : #include "xfs_error.h"
20 : #include "xfs_trace.h"
21 : #include "xfs_trans.h"
22 : #include "xfs_rmap.h"
23 : #include "xfs_ag.h"
24 :
25 : static struct kmem_cache *xfs_inobt_cur_cache;
26 :
27 : STATIC int
28 2457798 : xfs_inobt_get_minrecs(
29 : struct xfs_btree_cur *cur,
30 : int level)
31 : {
32 2457798 : return M_IGEO(cur->bc_mp)->inobt_mnr[level != 0];
33 : }
34 :
35 : STATIC struct xfs_btree_cur *
36 72836334 : xfs_inobt_dup_cursor(
37 : struct xfs_btree_cur *cur)
38 : {
39 72836334 : return xfs_inobt_init_cursor(cur->bc_ag.pag, cur->bc_tp,
40 : cur->bc_ag.agbp, cur->bc_btnum);
41 : }
42 :
43 : STATIC void
44 1234 : xfs_inobt_set_root(
45 : struct xfs_btree_cur *cur,
46 : const union xfs_btree_ptr *nptr,
47 : int inc) /* level change */
48 : {
49 1234 : struct xfs_buf *agbp = cur->bc_ag.agbp;
50 1234 : struct xfs_agi *agi = agbp->b_addr;
51 :
52 1234 : agi->agi_root = nptr->s;
53 1234 : be32_add_cpu(&agi->agi_level, inc);
54 1234 : xfs_ialloc_log_agi(cur->bc_tp, agbp, XFS_AGI_ROOT | XFS_AGI_LEVEL);
55 1234 : }
56 :
57 : STATIC void
58 877 : xfs_finobt_set_root(
59 : struct xfs_btree_cur *cur,
60 : const union xfs_btree_ptr *nptr,
61 : int inc) /* level change */
62 : {
63 877 : struct xfs_buf *agbp = cur->bc_ag.agbp;
64 877 : struct xfs_agi *agi = agbp->b_addr;
65 :
66 877 : agi->agi_free_root = nptr->s;
67 877 : be32_add_cpu(&agi->agi_free_level, inc);
68 877 : xfs_ialloc_log_agi(cur->bc_tp, agbp,
69 : XFS_AGI_FREE_ROOT | XFS_AGI_FREE_LEVEL);
70 877 : }
71 :
72 : /* Update the inode btree block counter for this btree. */
73 : static inline void
74 6940 : xfs_inobt_mod_blockcount(
75 : struct xfs_btree_cur *cur,
76 : int howmuch)
77 : {
78 6940 : struct xfs_buf *agbp = cur->bc_ag.agbp;
79 6940 : struct xfs_agi *agi = agbp->b_addr;
80 :
81 6940 : if (!xfs_has_inobtcounts(cur->bc_mp))
82 : return;
83 :
84 6940 : if (cur->bc_btnum == XFS_BTNUM_FINO)
85 2333 : be32_add_cpu(&agi->agi_fblocks, howmuch);
86 4607 : else if (cur->bc_btnum == XFS_BTNUM_INO)
87 4607 : be32_add_cpu(&agi->agi_iblocks, howmuch);
88 6940 : xfs_ialloc_log_agi(cur->bc_tp, agbp, XFS_AGI_IBLOCKS);
89 : }
90 :
91 : STATIC int
92 4464 : __xfs_inobt_alloc_block(
93 : struct xfs_btree_cur *cur,
94 : const union xfs_btree_ptr *start,
95 : union xfs_btree_ptr *new,
96 : int *stat,
97 : enum xfs_ag_resv_type resv)
98 : {
99 4464 : xfs_alloc_arg_t args; /* block allocation args */
100 4464 : int error; /* error return value */
101 4464 : xfs_agblock_t sbno = be32_to_cpu(start->s);
102 :
103 4464 : memset(&args, 0, sizeof(args));
104 4464 : args.tp = cur->bc_tp;
105 4464 : args.mp = cur->bc_mp;
106 4464 : args.pag = cur->bc_ag.pag;
107 4464 : args.oinfo = XFS_RMAP_OINFO_INOBT;
108 4464 : args.minlen = 1;
109 4464 : args.maxlen = 1;
110 4464 : args.prod = 1;
111 4464 : args.resv = resv;
112 :
113 8928 : error = xfs_alloc_vextent_near_bno(&args,
114 4464 : XFS_AGB_TO_FSB(args.mp, args.pag->pag_agno, sbno));
115 4464 : if (error)
116 : return error;
117 :
118 4464 : if (args.fsbno == NULLFSBLOCK) {
119 0 : *stat = 0;
120 0 : return 0;
121 : }
122 4464 : ASSERT(args.len == 1);
123 :
124 4464 : new->s = cpu_to_be32(XFS_FSB_TO_AGBNO(args.mp, args.fsbno));
125 4464 : *stat = 1;
126 4464 : xfs_inobt_mod_blockcount(cur, 1);
127 4464 : return 0;
128 : }
129 :
130 : STATIC int
131 3287 : xfs_inobt_alloc_block(
132 : struct xfs_btree_cur *cur,
133 : const union xfs_btree_ptr *start,
134 : union xfs_btree_ptr *new,
135 : int *stat)
136 : {
137 3287 : return __xfs_inobt_alloc_block(cur, start, new, stat, XFS_AG_RESV_NONE);
138 : }
139 :
140 : STATIC int
141 1177 : xfs_finobt_alloc_block(
142 : struct xfs_btree_cur *cur,
143 : const union xfs_btree_ptr *start,
144 : union xfs_btree_ptr *new,
145 : int *stat)
146 : {
147 1177 : if (cur->bc_mp->m_finobt_nores)
148 0 : return xfs_inobt_alloc_block(cur, start, new, stat);
149 1177 : return __xfs_inobt_alloc_block(cur, start, new, stat,
150 : XFS_AG_RESV_METADATA);
151 : }
152 :
153 : STATIC int
154 2476 : __xfs_inobt_free_block(
155 : struct xfs_btree_cur *cur,
156 : struct xfs_buf *bp,
157 : enum xfs_ag_resv_type resv)
158 : {
159 2476 : xfs_fsblock_t fsbno;
160 :
161 2476 : xfs_inobt_mod_blockcount(cur, -1);
162 2476 : fsbno = XFS_DADDR_TO_FSB(cur->bc_mp, xfs_buf_daddr(bp));
163 2476 : return xfs_free_extent_later(cur->bc_tp, fsbno, 1,
164 : &XFS_RMAP_OINFO_INOBT, resv);
165 : }
166 :
167 : STATIC int
168 1320 : xfs_inobt_free_block(
169 : struct xfs_btree_cur *cur,
170 : struct xfs_buf *bp)
171 : {
172 1320 : return __xfs_inobt_free_block(cur, bp, XFS_AG_RESV_NONE);
173 : }
174 :
175 : STATIC int
176 1156 : xfs_finobt_free_block(
177 : struct xfs_btree_cur *cur,
178 : struct xfs_buf *bp)
179 : {
180 1156 : if (cur->bc_mp->m_finobt_nores)
181 0 : return xfs_inobt_free_block(cur, bp);
182 1156 : return __xfs_inobt_free_block(cur, bp, XFS_AG_RESV_METADATA);
183 : }
184 :
185 : STATIC int
186 38922693866 : xfs_inobt_get_maxrecs(
187 : struct xfs_btree_cur *cur,
188 : int level)
189 : {
190 38922693866 : return M_IGEO(cur->bc_mp)->inobt_mxr[level != 0];
191 : }
192 :
193 : STATIC void
194 21734584695 : xfs_inobt_init_key_from_rec(
195 : union xfs_btree_key *key,
196 : const union xfs_btree_rec *rec)
197 : {
198 21734584695 : key->inobt.ir_startino = rec->inobt.ir_startino;
199 21734584695 : }
200 :
201 : STATIC void
202 822616 : xfs_inobt_init_high_key_from_rec(
203 : union xfs_btree_key *key,
204 : const union xfs_btree_rec *rec)
205 : {
206 822616 : __u32 x;
207 :
208 822616 : x = be32_to_cpu(rec->inobt.ir_startino);
209 822616 : x += XFS_INODES_PER_CHUNK - 1;
210 822616 : key->inobt.ir_startino = cpu_to_be32(x);
211 822616 : }
212 :
213 : STATIC void
214 13586668 : xfs_inobt_init_rec_from_cur(
215 : struct xfs_btree_cur *cur,
216 : union xfs_btree_rec *rec)
217 : {
218 13586668 : rec->inobt.ir_startino = cpu_to_be32(cur->bc_rec.i.ir_startino);
219 13586668 : if (xfs_has_sparseinodes(cur->bc_mp)) {
220 13586657 : rec->inobt.ir_u.sp.ir_holemask =
221 13586657 : cpu_to_be16(cur->bc_rec.i.ir_holemask);
222 13586657 : rec->inobt.ir_u.sp.ir_count = cur->bc_rec.i.ir_count;
223 13586657 : rec->inobt.ir_u.sp.ir_freecount = cur->bc_rec.i.ir_freecount;
224 : } else {
225 : /* ir_holemask/ir_count not supported on-disk */
226 11 : rec->inobt.ir_u.f.ir_freecount =
227 11 : cpu_to_be32(cur->bc_rec.i.ir_freecount);
228 : }
229 13586668 : rec->inobt.ir_free = cpu_to_be64(cur->bc_rec.i.ir_free);
230 13586668 : }
231 :
232 : /*
233 : * initial value of ptr for lookup
234 : */
235 : STATIC void
236 2487541395 : xfs_inobt_init_ptr_from_cur(
237 : struct xfs_btree_cur *cur,
238 : union xfs_btree_ptr *ptr)
239 : {
240 2487541395 : struct xfs_agi *agi = cur->bc_ag.agbp->b_addr;
241 :
242 2487541395 : ASSERT(cur->bc_ag.pag->pag_agno == be32_to_cpu(agi->agi_seqno));
243 :
244 2487541395 : ptr->s = agi->agi_root;
245 2487541395 : }
246 :
247 : STATIC void
248 4259321856 : xfs_finobt_init_ptr_from_cur(
249 : struct xfs_btree_cur *cur,
250 : union xfs_btree_ptr *ptr)
251 : {
252 4259321856 : struct xfs_agi *agi = cur->bc_ag.agbp->b_addr;
253 :
254 4259321856 : ASSERT(cur->bc_ag.pag->pag_agno == be32_to_cpu(agi->agi_seqno));
255 4259321856 : ptr->s = agi->agi_free_root;
256 4259321856 : }
257 :
258 : STATIC int64_t
259 24159643540 : xfs_inobt_key_diff(
260 : struct xfs_btree_cur *cur,
261 : const union xfs_btree_key *key)
262 : {
263 24159643540 : return (int64_t)be32_to_cpu(key->inobt.ir_startino) -
264 24159643540 : cur->bc_rec.i.ir_startino;
265 : }
266 :
267 : STATIC int64_t
268 195018808 : xfs_inobt_diff_two_keys(
269 : struct xfs_btree_cur *cur,
270 : const union xfs_btree_key *k1,
271 : const union xfs_btree_key *k2,
272 : const union xfs_btree_key *mask)
273 : {
274 195018808 : ASSERT(!mask || mask->inobt.ir_startino);
275 :
276 195018808 : return (int64_t)be32_to_cpu(k1->inobt.ir_startino) -
277 195018808 : be32_to_cpu(k2->inobt.ir_startino);
278 : }
279 :
280 : static xfs_failaddr_t
281 3966540 : xfs_inobt_verify(
282 : struct xfs_buf *bp)
283 : {
284 3966540 : struct xfs_mount *mp = bp->b_mount;
285 3966540 : struct xfs_btree_block *block = XFS_BUF_TO_BLOCK(bp);
286 3966540 : xfs_failaddr_t fa;
287 3966540 : unsigned int level;
288 :
289 3966540 : if (!xfs_verify_magic(bp, block->bb_magic))
290 0 : return __this_address;
291 :
292 : /*
293 : * During growfs operations, we can't verify the exact owner as the
294 : * perag is not fully initialised and hence not attached to the buffer.
295 : *
296 : * Similarly, during log recovery we will have a perag structure
297 : * attached, but the agi information will not yet have been initialised
298 : * from the on disk AGI. We don't currently use any of this information,
299 : * but beware of the landmine (i.e. need to check
300 : * xfs_perag_initialised_agi(pag)) if we ever do.
301 : */
302 3966276 : if (xfs_has_crc(mp)) {
303 3952127 : fa = xfs_btree_sblock_v5hdr_verify(bp);
304 3952377 : if (fa)
305 : return fa;
306 : }
307 :
308 : /* level verification */
309 3966509 : level = be16_to_cpu(block->bb_level);
310 3966509 : if (level >= M_IGEO(mp)->inobt_maxlevels)
311 0 : return __this_address;
312 :
313 3966490 : return xfs_btree_sblock_verify(bp,
314 3966509 : M_IGEO(mp)->inobt_mxr[level != 0]);
315 : }
316 :
317 : static void
318 440589 : xfs_inobt_read_verify(
319 : struct xfs_buf *bp)
320 : {
321 440589 : xfs_failaddr_t fa;
322 :
323 440589 : if (!xfs_btree_sblock_verify_crc(bp))
324 25 : xfs_verifier_error(bp, -EFSBADCRC, __this_address);
325 : else {
326 440564 : fa = xfs_inobt_verify(bp);
327 440564 : if (fa)
328 0 : xfs_verifier_error(bp, -EFSCORRUPTED, fa);
329 : }
330 :
331 440589 : if (bp->b_error)
332 25 : trace_xfs_btree_corrupt(bp, _RET_IP_);
333 440589 : }
334 :
335 : static void
336 1292392 : xfs_inobt_write_verify(
337 : struct xfs_buf *bp)
338 : {
339 1292392 : xfs_failaddr_t fa;
340 :
341 1292392 : fa = xfs_inobt_verify(bp);
342 1292392 : if (fa) {
343 0 : trace_xfs_btree_corrupt(bp, _RET_IP_);
344 0 : xfs_verifier_error(bp, -EFSCORRUPTED, fa);
345 0 : return;
346 : }
347 1292392 : xfs_btree_sblock_calc_crc(bp);
348 :
349 : }
350 :
351 : const struct xfs_buf_ops xfs_inobt_buf_ops = {
352 : .name = "xfs_inobt",
353 : .magic = { cpu_to_be32(XFS_IBT_MAGIC), cpu_to_be32(XFS_IBT_CRC_MAGIC) },
354 : .verify_read = xfs_inobt_read_verify,
355 : .verify_write = xfs_inobt_write_verify,
356 : .verify_struct = xfs_inobt_verify,
357 : };
358 :
359 : const struct xfs_buf_ops xfs_finobt_buf_ops = {
360 : .name = "xfs_finobt",
361 : .magic = { cpu_to_be32(XFS_FIBT_MAGIC),
362 : cpu_to_be32(XFS_FIBT_CRC_MAGIC) },
363 : .verify_read = xfs_inobt_read_verify,
364 : .verify_write = xfs_inobt_write_verify,
365 : .verify_struct = xfs_inobt_verify,
366 : };
367 :
368 : STATIC int
369 174493 : xfs_inobt_keys_inorder(
370 : struct xfs_btree_cur *cur,
371 : const union xfs_btree_key *k1,
372 : const union xfs_btree_key *k2)
373 : {
374 174493 : return be32_to_cpu(k1->inobt.ir_startino) <
375 174493 : be32_to_cpu(k2->inobt.ir_startino);
376 : }
377 :
378 : STATIC int
379 66882159 : xfs_inobt_recs_inorder(
380 : struct xfs_btree_cur *cur,
381 : const union xfs_btree_rec *r1,
382 : const union xfs_btree_rec *r2)
383 : {
384 66882159 : return be32_to_cpu(r1->inobt.ir_startino) + XFS_INODES_PER_CHUNK <=
385 66882159 : be32_to_cpu(r2->inobt.ir_startino);
386 : }
387 :
388 : STATIC enum xbtree_key_contig
389 0 : xfs_inobt_keys_contiguous(
390 : struct xfs_btree_cur *cur,
391 : const union xfs_btree_key *key1,
392 : const union xfs_btree_key *key2,
393 : const union xfs_btree_key *mask)
394 : {
395 0 : ASSERT(!mask || mask->inobt.ir_startino);
396 :
397 0 : return xbtree_key_contig(be32_to_cpu(key1->inobt.ir_startino),
398 0 : be32_to_cpu(key2->inobt.ir_startino));
399 : }
400 :
401 : static const struct xfs_btree_ops xfs_inobt_ops = {
402 : .rec_len = sizeof(xfs_inobt_rec_t),
403 : .key_len = sizeof(xfs_inobt_key_t),
404 :
405 : .dup_cursor = xfs_inobt_dup_cursor,
406 : .set_root = xfs_inobt_set_root,
407 : .alloc_block = xfs_inobt_alloc_block,
408 : .free_block = xfs_inobt_free_block,
409 : .get_minrecs = xfs_inobt_get_minrecs,
410 : .get_maxrecs = xfs_inobt_get_maxrecs,
411 : .init_key_from_rec = xfs_inobt_init_key_from_rec,
412 : .init_high_key_from_rec = xfs_inobt_init_high_key_from_rec,
413 : .init_rec_from_cur = xfs_inobt_init_rec_from_cur,
414 : .init_ptr_from_cur = xfs_inobt_init_ptr_from_cur,
415 : .key_diff = xfs_inobt_key_diff,
416 : .buf_ops = &xfs_inobt_buf_ops,
417 : .diff_two_keys = xfs_inobt_diff_two_keys,
418 : .keys_inorder = xfs_inobt_keys_inorder,
419 : .recs_inorder = xfs_inobt_recs_inorder,
420 : .keys_contiguous = xfs_inobt_keys_contiguous,
421 : };
422 :
423 : static const struct xfs_btree_ops xfs_finobt_ops = {
424 : .rec_len = sizeof(xfs_inobt_rec_t),
425 : .key_len = sizeof(xfs_inobt_key_t),
426 :
427 : .dup_cursor = xfs_inobt_dup_cursor,
428 : .set_root = xfs_finobt_set_root,
429 : .alloc_block = xfs_finobt_alloc_block,
430 : .free_block = xfs_finobt_free_block,
431 : .get_minrecs = xfs_inobt_get_minrecs,
432 : .get_maxrecs = xfs_inobt_get_maxrecs,
433 : .init_key_from_rec = xfs_inobt_init_key_from_rec,
434 : .init_high_key_from_rec = xfs_inobt_init_high_key_from_rec,
435 : .init_rec_from_cur = xfs_inobt_init_rec_from_cur,
436 : .init_ptr_from_cur = xfs_finobt_init_ptr_from_cur,
437 : .key_diff = xfs_inobt_key_diff,
438 : .buf_ops = &xfs_finobt_buf_ops,
439 : .diff_two_keys = xfs_inobt_diff_two_keys,
440 : .keys_inorder = xfs_inobt_keys_inorder,
441 : .recs_inorder = xfs_inobt_recs_inorder,
442 : .keys_contiguous = xfs_inobt_keys_contiguous,
443 : };
444 :
445 : /*
446 : * Initialize a new inode btree cursor.
447 : */
448 : static struct xfs_btree_cur *
449 2586254758 : xfs_inobt_init_common(
450 : struct xfs_perag *pag,
451 : struct xfs_trans *tp, /* transaction pointer */
452 : xfs_btnum_t btnum) /* ialloc or free ino btree */
453 : {
454 2586254758 : struct xfs_mount *mp = pag->pag_mount;
455 2586254758 : struct xfs_btree_cur *cur;
456 :
457 2586254758 : cur = xfs_btree_alloc_cursor(mp, tp, btnum,
458 2586254758 : M_IGEO(mp)->inobt_maxlevels, xfs_inobt_cur_cache);
459 2589805285 : if (btnum == XFS_BTNUM_INO) {
460 1699551209 : cur->bc_statoff = XFS_STATS_CALC_INDEX(xs_ibt_2);
461 1699551209 : cur->bc_ops = &xfs_inobt_ops;
462 : } else {
463 890254076 : cur->bc_statoff = XFS_STATS_CALC_INDEX(xs_fibt_2);
464 890254076 : cur->bc_ops = &xfs_finobt_ops;
465 : }
466 :
467 2589805285 : if (xfs_has_crc(mp))
468 2589776315 : cur->bc_flags |= XFS_BTREE_CRC_BLOCKS;
469 :
470 2589805285 : cur->bc_ag.pag = xfs_perag_hold(pag);
471 2590619674 : return cur;
472 : }
473 :
474 : /* Create an inode btree cursor. */
475 : struct xfs_btree_cur *
476 2587775211 : xfs_inobt_init_cursor(
477 : struct xfs_perag *pag,
478 : struct xfs_trans *tp,
479 : struct xfs_buf *agbp,
480 : xfs_btnum_t btnum)
481 : {
482 2587775211 : struct xfs_btree_cur *cur;
483 2587775211 : struct xfs_agi *agi = agbp->b_addr;
484 :
485 2587775211 : cur = xfs_inobt_init_common(pag, tp, btnum);
486 2590611823 : if (btnum == XFS_BTNUM_INO)
487 1699939789 : cur->bc_nlevels = be32_to_cpu(agi->agi_level);
488 : else
489 890672034 : cur->bc_nlevels = be32_to_cpu(agi->agi_free_level);
490 2590611823 : cur->bc_ag.agbp = agbp;
491 2590611823 : return cur;
492 : }
493 :
494 : /* Create an inode btree cursor with a fake root for staging. */
495 : struct xfs_btree_cur *
496 0 : xfs_inobt_stage_cursor(
497 : struct xfs_perag *pag,
498 : struct xbtree_afakeroot *afake,
499 : xfs_btnum_t btnum)
500 : {
501 0 : struct xfs_btree_cur *cur;
502 :
503 0 : cur = xfs_inobt_init_common(pag, NULL, btnum);
504 0 : xfs_btree_stage_afakeroot(cur, afake);
505 0 : return cur;
506 : }
507 :
508 : /*
509 : * Install a new inobt btree root. Caller is responsible for invalidating
510 : * and freeing the old btree blocks.
511 : */
512 : void
513 0 : xfs_inobt_commit_staged_btree(
514 : struct xfs_btree_cur *cur,
515 : struct xfs_trans *tp,
516 : struct xfs_buf *agbp)
517 : {
518 0 : struct xfs_agi *agi = agbp->b_addr;
519 0 : struct xbtree_afakeroot *afake = cur->bc_ag.afake;
520 0 : int fields;
521 :
522 0 : ASSERT(cur->bc_flags & XFS_BTREE_STAGING);
523 :
524 0 : if (cur->bc_btnum == XFS_BTNUM_INO) {
525 0 : fields = XFS_AGI_ROOT | XFS_AGI_LEVEL;
526 0 : agi->agi_root = cpu_to_be32(afake->af_root);
527 0 : agi->agi_level = cpu_to_be32(afake->af_levels);
528 0 : if (xfs_has_inobtcounts(cur->bc_mp)) {
529 0 : agi->agi_iblocks = cpu_to_be32(afake->af_blocks);
530 0 : fields |= XFS_AGI_IBLOCKS;
531 : }
532 0 : xfs_ialloc_log_agi(tp, agbp, fields);
533 0 : xfs_btree_commit_afakeroot(cur, tp, agbp, &xfs_inobt_ops);
534 : } else {
535 0 : fields = XFS_AGI_FREE_ROOT | XFS_AGI_FREE_LEVEL;
536 0 : agi->agi_free_root = cpu_to_be32(afake->af_root);
537 0 : agi->agi_free_level = cpu_to_be32(afake->af_levels);
538 0 : if (xfs_has_inobtcounts(cur->bc_mp)) {
539 0 : agi->agi_fblocks = cpu_to_be32(afake->af_blocks);
540 0 : fields |= XFS_AGI_IBLOCKS;
541 : }
542 0 : xfs_ialloc_log_agi(tp, agbp, fields);
543 0 : xfs_btree_commit_afakeroot(cur, tp, agbp, &xfs_finobt_ops);
544 : }
545 0 : }
546 :
547 : /* Calculate number of records in an inode btree block. */
548 : static inline unsigned int
549 : xfs_inobt_block_maxrecs(
550 : unsigned int blocklen,
551 : bool leaf)
552 : {
553 118810 : if (leaf)
554 59405 : return blocklen / sizeof(xfs_inobt_rec_t);
555 59405 : return blocklen / (sizeof(xfs_inobt_key_t) + sizeof(xfs_inobt_ptr_t));
556 : }
557 :
558 : /*
559 : * Calculate number of records in an inobt btree block.
560 : */
561 : int
562 118810 : xfs_inobt_maxrecs(
563 : struct xfs_mount *mp,
564 : int blocklen,
565 : int leaf)
566 : {
567 118810 : blocklen -= XFS_INOBT_BLOCK_LEN(mp);
568 118810 : return xfs_inobt_block_maxrecs(blocklen, leaf);
569 : }
570 :
571 : /*
572 : * Maximum number of inode btree records per AG. Pretend that we can fill an
573 : * entire AG completely full of inodes except for the AG headers.
574 : */
575 : #define XFS_MAX_INODE_RECORDS \
576 : ((XFS_MAX_AG_BYTES - (4 * BBSIZE)) / XFS_DINODE_MIN_SIZE) / \
577 : XFS_INODES_PER_CHUNK
578 :
579 : /* Compute the max possible height for the inode btree. */
580 : static inline unsigned int
581 59455 : xfs_inobt_maxlevels_ondisk(void)
582 : {
583 59455 : unsigned int minrecs[2];
584 59455 : unsigned int blocklen;
585 :
586 59455 : blocklen = min(XFS_MIN_BLOCKSIZE - XFS_BTREE_SBLOCK_LEN,
587 : XFS_MIN_CRC_BLOCKSIZE - XFS_BTREE_SBLOCK_CRC_LEN);
588 :
589 59455 : minrecs[0] = xfs_inobt_block_maxrecs(blocklen, true) / 2;
590 59455 : minrecs[1] = xfs_inobt_block_maxrecs(blocklen, false) / 2;
591 :
592 59455 : return xfs_btree_compute_maxlevels(minrecs, XFS_MAX_INODE_RECORDS);
593 : }
594 :
595 : /* Compute the max possible height for the free inode btree. */
596 : static inline unsigned int
597 59405 : xfs_finobt_maxlevels_ondisk(void)
598 : {
599 59405 : unsigned int minrecs[2];
600 59405 : unsigned int blocklen;
601 :
602 59405 : blocklen = XFS_MIN_CRC_BLOCKSIZE - XFS_BTREE_SBLOCK_CRC_LEN;
603 :
604 59405 : minrecs[0] = xfs_inobt_block_maxrecs(blocklen, true) / 2;
605 59405 : minrecs[1] = xfs_inobt_block_maxrecs(blocklen, false) / 2;
606 :
607 59405 : return xfs_btree_compute_maxlevels(minrecs, XFS_MAX_INODE_RECORDS);
608 : }
609 :
610 : /* Compute the max possible height for either inode btree. */
611 : unsigned int
612 59405 : xfs_iallocbt_maxlevels_ondisk(void)
613 : {
614 59405 : return max(xfs_inobt_maxlevels_ondisk(),
615 : xfs_finobt_maxlevels_ondisk());
616 : }
617 :
618 : /*
619 : * Convert the inode record holemask to an inode allocation bitmap. The inode
620 : * allocation bitmap is inode granularity and specifies whether an inode is
621 : * physically allocated on disk (not whether the inode is considered allocated
622 : * or free by the fs).
623 : *
624 : * A bit value of 1 means the inode is allocated, a value of 0 means it is free.
625 : */
626 : uint64_t
627 5893994878 : xfs_inobt_irec_to_allocmask(
628 : const struct xfs_inobt_rec_incore *rec)
629 : {
630 5893994878 : uint64_t bitmap = 0;
631 5893994878 : uint64_t inodespbit;
632 5893994878 : int nextbit;
633 5893994878 : uint allocbitmap;
634 :
635 : /*
636 : * The holemask has 16-bits for a 64 inode record. Therefore each
637 : * holemask bit represents multiple inodes. Create a mask of bits to set
638 : * in the allocmask for each holemask bit.
639 : */
640 5893994878 : inodespbit = (1 << XFS_INODES_PER_HOLEMASK_BIT) - 1;
641 :
642 : /*
643 : * Allocated inodes are represented by 0 bits in holemask. Invert the 0
644 : * bits to 1 and convert to a uint so we can use xfs_next_bit(). Mask
645 : * anything beyond the 16 holemask bits since this casts to a larger
646 : * type.
647 : */
648 5893994878 : allocbitmap = ~rec->ir_holemask & ((1 << XFS_INOBT_HOLEMASK_BITS) - 1);
649 :
650 : /*
651 : * allocbitmap is the inverted holemask so every set bit represents
652 : * allocated inodes. To expand from 16-bit holemask granularity to
653 : * 64-bit (e.g., bit-per-inode), set inodespbit bits in the target
654 : * bitmap for every holemask bit.
655 : */
656 5893994878 : nextbit = xfs_next_bit(&allocbitmap, 1, 0);
657 52802020051 : while (nextbit != -1) {
658 46902879561 : ASSERT(nextbit < (sizeof(rec->ir_holemask) * NBBY));
659 :
660 0 : bitmap |= (inodespbit <<
661 46902879561 : (nextbit * XFS_INODES_PER_HOLEMASK_BIT));
662 :
663 46902879561 : nextbit = xfs_next_bit(&allocbitmap, 1, nextbit + 1);
664 : }
665 :
666 5895759130 : return bitmap;
667 : }
668 :
669 : #if defined(DEBUG) || defined(XFS_WARN)
670 : /*
671 : * Verify that an in-core inode record has a valid inode count.
672 : */
673 : int
674 128655 : xfs_inobt_rec_check_count(
675 : struct xfs_mount *mp,
676 : struct xfs_inobt_rec_incore *rec)
677 : {
678 128655 : int inocount = 0;
679 128655 : int nextbit = 0;
680 128655 : uint64_t allocbmap;
681 128655 : int wordsz;
682 :
683 128655 : wordsz = sizeof(allocbmap) / sizeof(unsigned int);
684 128655 : allocbmap = xfs_inobt_irec_to_allocmask(rec);
685 :
686 128682 : nextbit = xfs_next_bit((uint *) &allocbmap, wordsz, nextbit);
687 8361117 : while (nextbit != -1) {
688 8232427 : inocount++;
689 8232427 : nextbit = xfs_next_bit((uint *) &allocbmap, wordsz,
690 8232427 : nextbit + 1);
691 : }
692 :
693 128688 : if (inocount != rec->ir_count)
694 0 : return -EFSCORRUPTED;
695 :
696 : return 0;
697 : }
698 : #endif /* DEBUG */
699 :
700 : static xfs_extlen_t
701 834231 : xfs_inobt_max_size(
702 : struct xfs_perag *pag)
703 : {
704 834231 : struct xfs_mount *mp = pag->pag_mount;
705 834231 : xfs_agblock_t agblocks = pag->block_count;
706 :
707 : /* Bail out if we're uninitialized, which can happen in mkfs. */
708 834231 : if (M_IGEO(mp)->inobt_mxr[0] == 0)
709 : return 0;
710 :
711 : /*
712 : * The log is permanently allocated, so the space it occupies will
713 : * never be available for the kinds of things that would require btree
714 : * expansion. We therefore can pretend the space isn't there.
715 : */
716 834231 : if (xfs_ag_contains_log(mp, pag->pag_agno))
717 80774 : agblocks -= mp->m_sb.sb_logblocks;
718 :
719 834231 : return xfs_btree_calc_size(M_IGEO(mp)->inobt_mnr,
720 834231 : (uint64_t)agblocks * mp->m_sb.sb_inopblock /
721 : XFS_INODES_PER_CHUNK);
722 : }
723 :
724 : /* Read AGI and create inobt cursor. */
725 : int
726 497705904 : xfs_inobt_cur(
727 : struct xfs_perag *pag,
728 : struct xfs_trans *tp,
729 : xfs_btnum_t which,
730 : struct xfs_btree_cur **curpp,
731 : struct xfs_buf **agi_bpp)
732 : {
733 497705904 : struct xfs_btree_cur *cur;
734 497705904 : int error;
735 :
736 497705904 : ASSERT(*agi_bpp == NULL);
737 497705904 : ASSERT(*curpp == NULL);
738 :
739 497705904 : error = xfs_ialloc_read_agi(pag, tp, agi_bpp);
740 497866333 : if (error)
741 : return error;
742 :
743 497862492 : cur = xfs_inobt_init_cursor(pag, tp, *agi_bpp, which);
744 497847937 : *curpp = cur;
745 497847937 : return 0;
746 : }
747 :
748 : static int
749 224 : xfs_inobt_count_blocks(
750 : struct xfs_perag *pag,
751 : struct xfs_trans *tp,
752 : xfs_btnum_t btnum,
753 : xfs_extlen_t *tree_blocks)
754 : {
755 224 : struct xfs_buf *agbp = NULL;
756 224 : struct xfs_btree_cur *cur = NULL;
757 224 : int error;
758 :
759 224 : error = xfs_inobt_cur(pag, tp, btnum, &cur, &agbp);
760 224 : if (error)
761 : return error;
762 :
763 224 : error = xfs_btree_count_blocks(cur, tree_blocks);
764 224 : xfs_btree_del_cursor(cur, error);
765 224 : xfs_trans_brelse(tp, agbp);
766 :
767 224 : return error;
768 : }
769 :
770 : /* Read finobt block count from AGI header. */
771 : static int
772 834048 : xfs_finobt_read_blocks(
773 : struct xfs_perag *pag,
774 : struct xfs_trans *tp,
775 : xfs_extlen_t *tree_blocks)
776 : {
777 834048 : struct xfs_buf *agbp;
778 834048 : struct xfs_agi *agi;
779 834048 : int error;
780 :
781 834048 : error = xfs_ialloc_read_agi(pag, tp, &agbp);
782 834048 : if (error)
783 : return error;
784 :
785 834007 : agi = agbp->b_addr;
786 834007 : *tree_blocks = be32_to_cpu(agi->agi_fblocks);
787 834007 : xfs_trans_brelse(tp, agbp);
788 834007 : return 0;
789 : }
790 :
791 : /*
792 : * Figure out how many blocks to reserve and how many are used by this btree.
793 : */
794 : int
795 849767 : xfs_finobt_calc_reserves(
796 : struct xfs_perag *pag,
797 : struct xfs_trans *tp,
798 : xfs_extlen_t *ask,
799 : xfs_extlen_t *used)
800 : {
801 849767 : xfs_extlen_t tree_len = 0;
802 849767 : int error;
803 :
804 849767 : if (!xfs_has_finobt(pag->pag_mount))
805 : return 0;
806 :
807 834272 : if (xfs_has_inobtcounts(pag->pag_mount))
808 834048 : error = xfs_finobt_read_blocks(pag, tp, &tree_len);
809 : else
810 224 : error = xfs_inobt_count_blocks(pag, tp, XFS_BTNUM_FINO,
811 : &tree_len);
812 834272 : if (error)
813 : return error;
814 :
815 834231 : *ask += xfs_inobt_max_size(pag);
816 834231 : *used += tree_len;
817 834231 : return 0;
818 : }
819 :
820 : /* Calculate the inobt btree size for some records. */
821 : xfs_extlen_t
822 3557763 : xfs_iallocbt_calc_size(
823 : struct xfs_mount *mp,
824 : unsigned long long len)
825 : {
826 3557763 : return xfs_btree_calc_size(M_IGEO(mp)->inobt_mnr, len);
827 : }
828 :
829 : int __init
830 50 : xfs_inobt_init_cur_cache(void)
831 : {
832 50 : xfs_inobt_cur_cache = kmem_cache_create("xfs_inobt_cur",
833 50 : xfs_btree_cur_sizeof(xfs_inobt_maxlevels_ondisk()),
834 : 0, 0, NULL);
835 :
836 50 : if (!xfs_inobt_cur_cache)
837 0 : return -ENOMEM;
838 : return 0;
839 : }
840 :
841 : void
842 49 : xfs_inobt_destroy_cur_cache(void)
843 : {
844 49 : kmem_cache_destroy(xfs_inobt_cur_cache);
845 49 : xfs_inobt_cur_cache = NULL;
846 49 : }
|
