Line data Source code
1 : // SPDX-License-Identifier: GPL-2.0-or-later
2 : /*
3 : * Copyright (C) 2017-2023 Oracle. All Rights Reserved.
4 : * Author: Darrick J. Wong <djwong@kernel.org>
5 : */
6 : #include "xfs.h"
7 : #include "xfs_fs.h"
8 : #include "xfs_shared.h"
9 : #include "xfs_format.h"
10 : #include "xfs_trans_resv.h"
11 : #include "xfs_mount.h"
12 : #include "xfs_btree.h"
13 : #include "xfs_sb.h"
14 : #include "xfs_alloc.h"
15 : #include "xfs_ialloc.h"
16 : #include "xfs_rmap.h"
17 : #include "xfs_ag.h"
18 : #include "scrub/scrub.h"
19 : #include "scrub/common.h"
20 :
21 : int
22 4889565 : xchk_setup_agheader(
23 : struct xfs_scrub *sc)
24 : {
25 4889565 : if (xchk_need_intent_drain(sc))
26 30957 : xchk_fsgates_enable(sc, XCHK_FSGATES_DRAIN);
27 4889565 : return xchk_setup_fs(sc);
28 : }
29 :
30 : /* Superblock */
31 :
32 : /* Cross-reference with the other btrees. */
33 : STATIC void
34 1071427 : xchk_superblock_xref(
35 : struct xfs_scrub *sc,
36 : struct xfs_buf *bp)
37 : {
38 1071427 : struct xfs_mount *mp = sc->mp;
39 1071427 : xfs_agnumber_t agno = sc->sm->sm_agno;
40 1071427 : xfs_agblock_t agbno;
41 1071427 : int error;
42 :
43 1071427 : if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
44 2736 : return;
45 :
46 1071433 : agbno = XFS_SB_BLOCK(mp);
47 :
48 1071433 : error = xchk_ag_init_existing(sc, agno, &sc->sa);
49 1071431 : if (!xchk_xref_process_error(sc, agno, agbno, &error))
50 : return;
51 :
52 1068737 : xchk_xref_is_used_space(sc, agbno, 1);
53 1068700 : xchk_xref_is_not_inode_chunk(sc, agbno, 1);
54 1068753 : xchk_xref_is_only_owned_by(sc, agbno, 1, &XFS_RMAP_OINFO_FS);
55 1068717 : xchk_xref_is_not_shared(sc, agbno, 1);
56 1068754 : xchk_xref_is_not_cow_staging(sc, agbno, 1);
57 :
58 : /* scrub teardown will take care of sc->sa for us */
59 : }
60 :
61 : /*
62 : * Scrub the filesystem superblock.
63 : *
64 : * Note: We do /not/ attempt to check AG 0's superblock. Mount is
65 : * responsible for validating all the geometry information in sb 0, so
66 : * if the filesystem is capable of initiating online scrub, then clearly
67 : * sb 0 is ok and we can use its information to check everything else.
68 : */
69 : int
70 1460322 : xchk_superblock(
71 : struct xfs_scrub *sc)
72 : {
73 1460322 : struct xfs_mount *mp = sc->mp;
74 1460322 : struct xfs_buf *bp;
75 1460322 : struct xfs_dsb *sb;
76 1460322 : struct xfs_perag *pag;
77 1460322 : xfs_agnumber_t agno;
78 1460322 : uint32_t v2_ok;
79 1460322 : __be32 features_mask;
80 1460322 : int error;
81 1460322 : __be16 vernum_mask;
82 :
83 1460322 : agno = sc->sm->sm_agno;
84 1460322 : if (agno == 0)
85 : return 0;
86 :
87 : /*
88 : * Grab an active reference to the perag structure. If we can't get
89 : * it, we're racing with something that's tearing down the AG, so
90 : * signal that the AG no longer exists.
91 : */
92 1071486 : pag = xfs_perag_get(mp, agno);
93 1071481 : if (!pag)
94 : return -ENOENT;
95 :
96 1071481 : error = xfs_sb_read_secondary(mp, sc->tp, agno, &bp);
97 : /*
98 : * The superblock verifier can return several different error codes
99 : * if it thinks the superblock doesn't look right. For a mount these
100 : * would all get bounced back to userspace, but if we're here then the
101 : * fs mounted successfully, which means that this secondary superblock
102 : * is simply incorrect. Treat all these codes the same way we treat
103 : * any corruption.
104 : */
105 1071462 : switch (error) {
106 2 : case -EINVAL: /* also -EWRONGFS */
107 : case -ENOSYS:
108 : case -EFBIG:
109 2 : error = -EFSCORRUPTED;
110 1071462 : fallthrough;
111 : default:
112 1071462 : break;
113 : }
114 1071462 : if (!xchk_process_error(sc, agno, XFS_SB_BLOCK(mp), &error))
115 2 : goto out_pag;
116 :
117 1071472 : sb = bp->b_addr;
118 :
119 : /*
120 : * Verify the geometries match. Fields that are permanently
121 : * set by mkfs are checked; fields that can be updated later
122 : * (and are not propagated to backup superblocks) are preen
123 : * checked.
124 : */
125 2142944 : if (sb->sb_blocksize != cpu_to_be32(mp->m_sb.sb_blocksize))
126 0 : xchk_block_set_corrupt(sc, bp);
127 :
128 1071457 : if (sb->sb_dblocks != cpu_to_be64(mp->m_sb.sb_dblocks))
129 0 : xchk_block_set_corrupt(sc, bp);
130 :
131 1071438 : if (sb->sb_rblocks != cpu_to_be64(mp->m_sb.sb_rblocks))
132 0 : xchk_block_set_corrupt(sc, bp);
133 :
134 1071446 : if (sb->sb_rextents != cpu_to_be64(mp->m_sb.sb_rextents))
135 0 : xchk_block_set_corrupt(sc, bp);
136 :
137 1071446 : if (!uuid_equal(&sb->sb_uuid, &mp->m_sb.sb_uuid))
138 0 : xchk_block_set_preen(sc, bp);
139 :
140 1071454 : if (sb->sb_logstart != cpu_to_be64(mp->m_sb.sb_logstart))
141 0 : xchk_block_set_corrupt(sc, bp);
142 :
143 1071460 : if (sb->sb_rootino != cpu_to_be64(mp->m_sb.sb_rootino))
144 115145 : xchk_block_set_preen(sc, bp);
145 :
146 1071440 : if (sb->sb_rbmino != cpu_to_be64(mp->m_sb.sb_rbmino))
147 338993 : xchk_block_set_preen(sc, bp);
148 :
149 1071449 : if (sb->sb_rsumino != cpu_to_be64(mp->m_sb.sb_rsumino))
150 338993 : xchk_block_set_preen(sc, bp);
151 :
152 2142910 : if (sb->sb_rextsize != cpu_to_be32(mp->m_sb.sb_rextsize))
153 0 : xchk_block_set_corrupt(sc, bp);
154 :
155 2142906 : if (sb->sb_agblocks != cpu_to_be32(mp->m_sb.sb_agblocks))
156 0 : xchk_block_set_corrupt(sc, bp);
157 :
158 2142918 : if (sb->sb_agcount != cpu_to_be32(mp->m_sb.sb_agcount))
159 0 : xchk_block_set_corrupt(sc, bp);
160 :
161 2142920 : if (sb->sb_rbmblocks != cpu_to_be32(mp->m_sb.sb_rbmblocks))
162 0 : xchk_block_set_corrupt(sc, bp);
163 :
164 2142922 : if (sb->sb_logblocks != cpu_to_be32(mp->m_sb.sb_logblocks))
165 0 : xchk_block_set_corrupt(sc, bp);
166 :
167 : /* Check sb_versionnum bits that are set at mkfs time. */
168 1071464 : vernum_mask = cpu_to_be16(~XFS_SB_VERSION_OKBITS |
169 : XFS_SB_VERSION_NUMBITS |
170 : XFS_SB_VERSION_ALIGNBIT |
171 : XFS_SB_VERSION_DALIGNBIT |
172 : XFS_SB_VERSION_SHAREDBIT |
173 : XFS_SB_VERSION_LOGV2BIT |
174 : XFS_SB_VERSION_SECTORBIT |
175 : XFS_SB_VERSION_EXTFLGBIT |
176 : XFS_SB_VERSION_DIRV2BIT);
177 2142928 : if ((sb->sb_versionnum & vernum_mask) !=
178 1071464 : (cpu_to_be16(mp->m_sb.sb_versionnum) & vernum_mask))
179 0 : xchk_block_set_corrupt(sc, bp);
180 :
181 : /* Check sb_versionnum bits that can be set after mkfs time. */
182 1071460 : vernum_mask = cpu_to_be16(XFS_SB_VERSION_ATTRBIT |
183 : XFS_SB_VERSION_NLINKBIT |
184 : XFS_SB_VERSION_QUOTABIT);
185 2142920 : if ((sb->sb_versionnum & vernum_mask) !=
186 1071460 : (cpu_to_be16(mp->m_sb.sb_versionnum) & vernum_mask))
187 262925 : xchk_block_set_preen(sc, bp);
188 :
189 1071459 : if (sb->sb_sectsize != cpu_to_be16(mp->m_sb.sb_sectsize))
190 0 : xchk_block_set_corrupt(sc, bp);
191 :
192 1071458 : if (sb->sb_inodesize != cpu_to_be16(mp->m_sb.sb_inodesize))
193 0 : xchk_block_set_corrupt(sc, bp);
194 :
195 1071454 : if (sb->sb_inopblock != cpu_to_be16(mp->m_sb.sb_inopblock))
196 0 : xchk_block_set_corrupt(sc, bp);
197 :
198 2142744 : if (memcmp(sb->sb_fname, mp->m_sb.sb_fname, sizeof(sb->sb_fname)))
199 0 : xchk_block_set_preen(sc, bp);
200 :
201 1071372 : if (sb->sb_blocklog != mp->m_sb.sb_blocklog)
202 0 : xchk_block_set_corrupt(sc, bp);
203 :
204 1071372 : if (sb->sb_sectlog != mp->m_sb.sb_sectlog)
205 0 : xchk_block_set_corrupt(sc, bp);
206 :
207 1071372 : if (sb->sb_inodelog != mp->m_sb.sb_inodelog)
208 0 : xchk_block_set_corrupt(sc, bp);
209 :
210 1071372 : if (sb->sb_inopblog != mp->m_sb.sb_inopblog)
211 0 : xchk_block_set_corrupt(sc, bp);
212 :
213 1071372 : if (sb->sb_agblklog != mp->m_sb.sb_agblklog)
214 0 : xchk_block_set_corrupt(sc, bp);
215 :
216 1071372 : if (sb->sb_rextslog != mp->m_sb.sb_rextslog)
217 0 : xchk_block_set_corrupt(sc, bp);
218 :
219 1071372 : if (sb->sb_imax_pct != mp->m_sb.sb_imax_pct)
220 0 : xchk_block_set_preen(sc, bp);
221 :
222 : /*
223 : * Skip the summary counters since we track them in memory anyway.
224 : * sb_icount, sb_ifree, sb_fdblocks, sb_frexents
225 : */
226 :
227 1071372 : if (sb->sb_uquotino != cpu_to_be64(mp->m_sb.sb_uquotino))
228 338992 : xchk_block_set_preen(sc, bp);
229 :
230 1071430 : if (sb->sb_gquotino != cpu_to_be64(mp->m_sb.sb_gquotino))
231 338993 : xchk_block_set_preen(sc, bp);
232 :
233 : /*
234 : * Skip the quota flags since repair will force quotacheck.
235 : * sb_qflags
236 : */
237 :
238 1071428 : if (sb->sb_flags != mp->m_sb.sb_flags)
239 0 : xchk_block_set_corrupt(sc, bp);
240 :
241 1071428 : if (sb->sb_shared_vn != mp->m_sb.sb_shared_vn)
242 0 : xchk_block_set_corrupt(sc, bp);
243 :
244 2142880 : if (sb->sb_inoalignmt != cpu_to_be32(mp->m_sb.sb_inoalignmt))
245 0 : xchk_block_set_corrupt(sc, bp);
246 :
247 2142884 : if (sb->sb_unit != cpu_to_be32(mp->m_sb.sb_unit))
248 0 : xchk_block_set_preen(sc, bp);
249 :
250 2142878 : if (sb->sb_width != cpu_to_be32(mp->m_sb.sb_width))
251 60 : xchk_block_set_preen(sc, bp);
252 :
253 1071439 : if (sb->sb_dirblklog != mp->m_sb.sb_dirblklog)
254 0 : xchk_block_set_corrupt(sc, bp);
255 :
256 1071439 : if (sb->sb_logsectlog != mp->m_sb.sb_logsectlog)
257 0 : xchk_block_set_corrupt(sc, bp);
258 :
259 1071427 : if (sb->sb_logsectsize != cpu_to_be16(mp->m_sb.sb_logsectsize))
260 0 : xchk_block_set_corrupt(sc, bp);
261 :
262 2142872 : if (sb->sb_logsunit != cpu_to_be32(mp->m_sb.sb_logsunit))
263 0 : xchk_block_set_corrupt(sc, bp);
264 :
265 : /* Do we see any invalid bits in sb_features2? */
266 1071444 : if (!xfs_sb_version_hasmorebits(&mp->m_sb)) {
267 0 : if (sb->sb_features2 != 0)
268 0 : xchk_block_set_corrupt(sc, bp);
269 : } else {
270 1071442 : v2_ok = XFS_SB_VERSION2_OKBITS;
271 1071442 : if (xfs_sb_is_v5(&mp->m_sb))
272 1071459 : v2_ok |= XFS_SB_VERSION2_CRCBIT;
273 :
274 2142884 : if (!!(sb->sb_features2 & cpu_to_be32(~v2_ok)))
275 0 : xchk_block_set_corrupt(sc, bp);
276 :
277 1071442 : if (sb->sb_features2 != sb->sb_bad_features2)
278 0 : xchk_block_set_preen(sc, bp);
279 : }
280 :
281 : /* Check sb_features2 flags that are set at mkfs time. */
282 1071442 : features_mask = cpu_to_be32(XFS_SB_VERSION2_LAZYSBCOUNTBIT |
283 : XFS_SB_VERSION2_PROJID32BIT |
284 : XFS_SB_VERSION2_CRCBIT |
285 : XFS_SB_VERSION2_FTYPE);
286 1071442 : if ((sb->sb_features2 & features_mask) !=
287 1071442 : (cpu_to_be32(mp->m_sb.sb_features2) & features_mask))
288 0 : xchk_block_set_corrupt(sc, bp);
289 :
290 : /* Check sb_features2 flags that can be set after mkfs time. */
291 1071456 : features_mask = cpu_to_be32(XFS_SB_VERSION2_ATTR2BIT);
292 1071456 : if ((sb->sb_features2 & features_mask) !=
293 1071456 : (cpu_to_be32(mp->m_sb.sb_features2) & features_mask))
294 0 : xchk_block_set_preen(sc, bp);
295 :
296 1071463 : if (!xfs_has_crc(mp)) {
297 : /* all v5 fields must be zero */
298 4 : if (memchr_inv(&sb->sb_features_compat, 0,
299 : sizeof(struct xfs_dsb) -
300 : offsetof(struct xfs_dsb, sb_features_compat)))
301 0 : xchk_block_set_corrupt(sc, bp);
302 : } else {
303 : /* compat features must match */
304 1071461 : if (sb->sb_features_compat !=
305 1071461 : cpu_to_be32(mp->m_sb.sb_features_compat))
306 0 : xchk_block_set_corrupt(sc, bp);
307 :
308 : /* ro compat features must match */
309 1071458 : if (sb->sb_features_ro_compat !=
310 1071458 : cpu_to_be32(mp->m_sb.sb_features_ro_compat))
311 0 : xchk_block_set_corrupt(sc, bp);
312 :
313 : /*
314 : * NEEDSREPAIR is ignored on a secondary super, so we should
315 : * clear it when we find it, though it's not a corruption.
316 : */
317 1071463 : features_mask = cpu_to_be32(XFS_SB_FEAT_INCOMPAT_NEEDSREPAIR);
318 1071463 : if ((cpu_to_be32(mp->m_sb.sb_features_incompat) ^
319 1071463 : sb->sb_features_incompat) & features_mask)
320 0 : xchk_block_set_preen(sc, bp);
321 :
322 : /* all other incompat features must match */
323 1071448 : if ((cpu_to_be32(mp->m_sb.sb_features_incompat) ^
324 1071448 : sb->sb_features_incompat) & ~features_mask)
325 0 : xchk_block_set_corrupt(sc, bp);
326 :
327 : /*
328 : * log incompat features protect newer log record types from
329 : * older log recovery code. Log recovery doesn't check the
330 : * secondary supers, so we can clear these if needed.
331 : */
332 1071448 : if (sb->sb_features_log_incompat)
333 0 : xchk_block_set_preen(sc, bp);
334 :
335 : /* Don't care about sb_crc */
336 :
337 2142940 : if (sb->sb_spino_align != cpu_to_be32(mp->m_sb.sb_spino_align))
338 0 : xchk_block_set_corrupt(sc, bp);
339 :
340 1071440 : if (sb->sb_pquotino != cpu_to_be64(mp->m_sb.sb_pquotino))
341 338988 : xchk_block_set_preen(sc, bp);
342 :
343 : /* Don't care about sb_lsn */
344 : }
345 :
346 1071443 : if (xfs_has_metauuid(mp)) {
347 : /* The metadata UUID must be the same for all supers */
348 6 : if (!uuid_equal(&sb->sb_meta_uuid, &mp->m_sb.sb_meta_uuid))
349 0 : xchk_block_set_corrupt(sc, bp);
350 : }
351 :
352 : /* Everything else must be zero. */
353 1071480 : if (memchr_inv(sb + 1, 0,
354 1071443 : BBTOB(bp->b_length) - sizeof(struct xfs_dsb)))
355 0 : xchk_block_set_corrupt(sc, bp);
356 :
357 1071480 : xchk_superblock_xref(sc, bp);
358 1071494 : out_pag:
359 1071494 : xfs_perag_put(pag);
360 1071492 : return error;
361 : }
362 :
363 : /* AGF */
364 :
365 : /* Tally freespace record lengths. */
366 : STATIC int
367 800351580 : xchk_agf_record_bno_lengths(
368 : struct xfs_btree_cur *cur,
369 : const struct xfs_alloc_rec_incore *rec,
370 : void *priv)
371 : {
372 800351580 : xfs_extlen_t *blocks = priv;
373 :
374 800351580 : (*blocks) += rec->ar_blockcount;
375 800351580 : return 0;
376 : }
377 :
378 : /* Check agf_freeblks */
379 : static inline void
380 1121675 : xchk_agf_xref_freeblks(
381 : struct xfs_scrub *sc)
382 : {
383 1121675 : struct xfs_agf *agf = sc->sa.agf_bp->b_addr;
384 1121675 : xfs_extlen_t blocks = 0;
385 1121675 : int error;
386 :
387 1121675 : if (!sc->sa.bno_cur)
388 0 : return;
389 :
390 1121675 : error = xfs_alloc_query_all(sc->sa.bno_cur,
391 : xchk_agf_record_bno_lengths, &blocks);
392 1121675 : if (!xchk_should_check_xref(sc, &error, &sc->sa.bno_cur))
393 : return;
394 2243356 : if (blocks != be32_to_cpu(agf->agf_freeblks))
395 0 : xchk_block_xref_set_corrupt(sc, sc->sa.agf_bp);
396 : }
397 :
398 : /* Cross reference the AGF with the cntbt (freespace by length btree) */
399 : static inline void
400 1121646 : xchk_agf_xref_cntbt(
401 : struct xfs_scrub *sc)
402 : {
403 1121646 : struct xfs_agf *agf = sc->sa.agf_bp->b_addr;
404 1121646 : xfs_agblock_t agbno;
405 1121646 : xfs_extlen_t blocks;
406 1121646 : int have;
407 1121646 : int error;
408 :
409 1121646 : if (!sc->sa.cnt_cur)
410 0 : return;
411 :
412 : /* Any freespace at all? */
413 1121646 : error = xfs_alloc_lookup_le(sc->sa.cnt_cur, 0, -1U, &have);
414 1121687 : if (!xchk_should_check_xref(sc, &error, &sc->sa.cnt_cur))
415 : return;
416 1121672 : if (!have) {
417 0 : if (agf->agf_freeblks != cpu_to_be32(0))
418 0 : xchk_block_xref_set_corrupt(sc, sc->sa.agf_bp);
419 0 : return;
420 : }
421 :
422 : /* Check agf_longest */
423 1121672 : error = xfs_alloc_get_rec(sc->sa.cnt_cur, &agbno, &blocks, &have);
424 1121677 : if (!xchk_should_check_xref(sc, &error, &sc->sa.cnt_cur))
425 : return;
426 2243368 : if (!have || blocks != be32_to_cpu(agf->agf_longest))
427 8 : xchk_block_xref_set_corrupt(sc, sc->sa.agf_bp);
428 : }
429 :
430 : /* Check the btree block counts in the AGF against the btrees. */
431 : STATIC void
432 1121719 : xchk_agf_xref_btreeblks(
433 : struct xfs_scrub *sc)
434 : {
435 1121719 : struct xfs_agf *agf = sc->sa.agf_bp->b_addr;
436 1121719 : struct xfs_mount *mp = sc->mp;
437 1121719 : xfs_agblock_t blocks;
438 1121719 : xfs_agblock_t btreeblks;
439 1121719 : int error;
440 :
441 : /* agf_btreeblks didn't exist before lazysbcount */
442 1121719 : if (!xfs_has_lazysbcount(sc->mp))
443 0 : return;
444 :
445 : /* Check agf_rmap_blocks; set up for agf_btreeblks check */
446 1121719 : if (sc->sa.rmap_cur) {
447 795923 : error = xfs_btree_count_blocks(sc->sa.rmap_cur, &blocks);
448 795874 : if (!xchk_should_check_xref(sc, &error, &sc->sa.rmap_cur))
449 : return;
450 795878 : btreeblks = blocks - 1;
451 1591756 : if (blocks != be32_to_cpu(agf->agf_rmap_blocks))
452 0 : xchk_block_xref_set_corrupt(sc, sc->sa.agf_bp);
453 : } else {
454 : btreeblks = 0;
455 : }
456 :
457 : /*
458 : * No rmap cursor; we can't xref if we have the rmapbt feature.
459 : * We also can't do it if we're missing the free space btree cursors.
460 : */
461 1121674 : if ((xfs_has_rmapbt(mp) && !sc->sa.rmap_cur) ||
462 1121674 : !sc->sa.bno_cur || !sc->sa.cnt_cur)
463 : return;
464 :
465 : /* Check agf_btreeblks */
466 1121674 : error = xfs_btree_count_blocks(sc->sa.bno_cur, &blocks);
467 1121639 : if (!xchk_should_check_xref(sc, &error, &sc->sa.bno_cur))
468 : return;
469 1121648 : btreeblks += blocks - 1;
470 :
471 1121648 : error = xfs_btree_count_blocks(sc->sa.cnt_cur, &blocks);
472 1121641 : if (!xchk_should_check_xref(sc, &error, &sc->sa.cnt_cur))
473 : return;
474 1121656 : btreeblks += blocks - 1;
475 :
476 2243312 : if (btreeblks != be32_to_cpu(agf->agf_btreeblks))
477 0 : xchk_block_xref_set_corrupt(sc, sc->sa.agf_bp);
478 : }
479 :
480 : /* Check agf_refcount_blocks against tree size */
481 : static inline void
482 1121690 : xchk_agf_xref_refcblks(
483 : struct xfs_scrub *sc)
484 : {
485 1121690 : struct xfs_agf *agf = sc->sa.agf_bp->b_addr;
486 1121690 : xfs_agblock_t blocks;
487 1121690 : int error;
488 :
489 1121690 : if (!sc->sa.refc_cur)
490 325753 : return;
491 :
492 795937 : error = xfs_btree_count_blocks(sc->sa.refc_cur, &blocks);
493 795931 : if (!xchk_should_check_xref(sc, &error, &sc->sa.refc_cur))
494 : return;
495 1591878 : if (blocks != be32_to_cpu(agf->agf_refcount_blocks))
496 0 : xchk_block_xref_set_corrupt(sc, sc->sa.agf_bp);
497 : }
498 :
499 : /* Cross-reference with the other btrees. */
500 : STATIC void
501 1121666 : xchk_agf_xref(
502 : struct xfs_scrub *sc)
503 : {
504 1121666 : struct xfs_mount *mp = sc->mp;
505 1121666 : xfs_agblock_t agbno;
506 :
507 1121666 : if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
508 : return;
509 :
510 1121666 : agbno = XFS_AGF_BLOCK(mp);
511 :
512 1121666 : xchk_ag_btcur_init(sc, &sc->sa);
513 :
514 1121681 : xchk_xref_is_used_space(sc, agbno, 1);
515 1121691 : xchk_agf_xref_freeblks(sc);
516 1121666 : xchk_agf_xref_cntbt(sc);
517 1121649 : xchk_xref_is_not_inode_chunk(sc, agbno, 1);
518 1121690 : xchk_xref_is_only_owned_by(sc, agbno, 1, &XFS_RMAP_OINFO_FS);
519 1121686 : xchk_agf_xref_btreeblks(sc);
520 1121674 : xchk_xref_is_not_shared(sc, agbno, 1);
521 1121686 : xchk_xref_is_not_cow_staging(sc, agbno, 1);
522 1121689 : xchk_agf_xref_refcblks(sc);
523 :
524 : /* scrub teardown will take care of sc->sa for us */
525 : }
526 :
527 : /* Scrub the AGF. */
528 : int
529 1132432 : xchk_agf(
530 : struct xfs_scrub *sc)
531 : {
532 1132432 : struct xfs_mount *mp = sc->mp;
533 1132432 : struct xfs_agf *agf;
534 1132432 : struct xfs_perag *pag;
535 1132432 : xfs_agnumber_t agno = sc->sm->sm_agno;
536 1132432 : xfs_agblock_t agbno;
537 1132432 : xfs_agblock_t eoag;
538 1132432 : xfs_agblock_t agfl_first;
539 1132432 : xfs_agblock_t agfl_last;
540 1132432 : xfs_agblock_t agfl_count;
541 1132432 : xfs_agblock_t fl_count;
542 1132432 : int level;
543 1132432 : int error = 0;
544 :
545 1132432 : error = xchk_ag_read_headers(sc, agno, &sc->sa);
546 1132464 : if (!xchk_process_error(sc, agno, XFS_AGF_BLOCK(sc->mp), &error))
547 10764 : goto out;
548 1121685 : xchk_buffer_recheck(sc, sc->sa.agf_bp);
549 :
550 1121670 : agf = sc->sa.agf_bp->b_addr;
551 1121670 : pag = sc->sa.pag;
552 :
553 : /* Check the AG length */
554 1121670 : eoag = be32_to_cpu(agf->agf_length);
555 1121670 : if (eoag != pag->block_count)
556 0 : xchk_block_set_corrupt(sc, sc->sa.agf_bp);
557 :
558 : /* Check the AGF btree roots and levels */
559 1121672 : agbno = be32_to_cpu(agf->agf_roots[XFS_BTNUM_BNO]);
560 1121672 : if (!xfs_verify_agbno(pag, agbno))
561 0 : xchk_block_set_corrupt(sc, sc->sa.agf_bp);
562 :
563 1121675 : agbno = be32_to_cpu(agf->agf_roots[XFS_BTNUM_CNT]);
564 1121675 : if (!xfs_verify_agbno(pag, agbno))
565 10 : xchk_block_set_corrupt(sc, sc->sa.agf_bp);
566 :
567 1121675 : level = be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]);
568 1121675 : if (level <= 0 || level > mp->m_alloc_maxlevels)
569 0 : xchk_block_set_corrupt(sc, sc->sa.agf_bp);
570 :
571 1121672 : level = be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]);
572 1121672 : if (level <= 0 || level > mp->m_alloc_maxlevels)
573 0 : xchk_block_set_corrupt(sc, sc->sa.agf_bp);
574 :
575 1121672 : if (xfs_has_rmapbt(mp)) {
576 795916 : agbno = be32_to_cpu(agf->agf_roots[XFS_BTNUM_RMAP]);
577 795916 : if (!xfs_verify_agbno(pag, agbno))
578 0 : xchk_block_set_corrupt(sc, sc->sa.agf_bp);
579 :
580 795919 : level = be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAP]);
581 795919 : if (level <= 0 || level > mp->m_rmap_maxlevels)
582 0 : xchk_block_set_corrupt(sc, sc->sa.agf_bp);
583 : }
584 :
585 1121675 : if (xfs_has_reflink(mp)) {
586 795920 : agbno = be32_to_cpu(agf->agf_refcount_root);
587 795920 : if (!xfs_verify_agbno(pag, agbno))
588 0 : xchk_block_set_corrupt(sc, sc->sa.agf_bp);
589 :
590 795925 : level = be32_to_cpu(agf->agf_refcount_level);
591 795925 : if (level <= 0 || level > mp->m_refc_maxlevels)
592 0 : xchk_block_set_corrupt(sc, sc->sa.agf_bp);
593 : }
594 :
595 : /* Check the AGFL counters */
596 1121680 : agfl_first = be32_to_cpu(agf->agf_flfirst);
597 1121680 : agfl_last = be32_to_cpu(agf->agf_fllast);
598 1121680 : agfl_count = be32_to_cpu(agf->agf_flcount);
599 1121680 : if (agfl_last > agfl_first)
600 1116871 : fl_count = agfl_last - agfl_first + 1;
601 : else
602 4809 : fl_count = xfs_agfl_size(mp) - agfl_first + agfl_last + 1;
603 1121680 : if (agfl_count != 0 && fl_count != agfl_count)
604 0 : xchk_block_set_corrupt(sc, sc->sa.agf_bp);
605 :
606 : /* Do the incore counters match? */
607 2243366 : if (pag->pagf_freeblks != be32_to_cpu(agf->agf_freeblks))
608 0 : xchk_block_set_corrupt(sc, sc->sa.agf_bp);
609 2243358 : if (pag->pagf_flcount != be32_to_cpu(agf->agf_flcount))
610 0 : xchk_block_set_corrupt(sc, sc->sa.agf_bp);
611 2243356 : if (xfs_has_lazysbcount(sc->mp) &&
612 1121677 : pag->pagf_btreeblks != be32_to_cpu(agf->agf_btreeblks))
613 0 : xchk_block_set_corrupt(sc, sc->sa.agf_bp);
614 :
615 1121679 : xchk_agf_xref(sc);
616 1132451 : out:
617 1132451 : return error;
618 : }
619 :
620 : /* AGFL */
621 :
622 : struct xchk_agfl_info {
623 : /* Number of AGFL entries that the AGF claims are in use. */
624 : unsigned int agflcount;
625 :
626 : /* Number of AGFL entries that we found. */
627 : unsigned int nr_entries;
628 :
629 : /* Buffer to hold AGFL entries for extent checking. */
630 : xfs_agblock_t *entries;
631 :
632 : struct xfs_buf *agfl_bp;
633 : struct xfs_scrub *sc;
634 : };
635 :
636 : /* Cross-reference with the other btrees. */
637 : STATIC void
638 6851208 : xchk_agfl_block_xref(
639 : struct xfs_scrub *sc,
640 : xfs_agblock_t agbno)
641 : {
642 6851208 : if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
643 : return;
644 :
645 6851188 : xchk_xref_is_used_space(sc, agbno, 1);
646 6851532 : xchk_xref_is_not_inode_chunk(sc, agbno, 1);
647 6851212 : xchk_xref_is_only_owned_by(sc, agbno, 1, &XFS_RMAP_OINFO_AG);
648 6851344 : xchk_xref_is_not_shared(sc, agbno, 1);
649 6851601 : xchk_xref_is_not_cow_staging(sc, agbno, 1);
650 : }
651 :
652 : /* Scrub an AGFL block. */
653 : STATIC int
654 6851203 : xchk_agfl_block(
655 : struct xfs_mount *mp,
656 : xfs_agblock_t agbno,
657 : void *priv)
658 : {
659 6851203 : struct xchk_agfl_info *sai = priv;
660 6851203 : struct xfs_scrub *sc = sai->sc;
661 :
662 6851203 : if (xfs_verify_agbno(sc->sa.pag, agbno) &&
663 6851203 : sai->nr_entries < sai->agflcount)
664 6851191 : sai->entries[sai->nr_entries++] = agbno;
665 : else
666 25 : xchk_block_set_corrupt(sc, sai->agfl_bp);
667 :
668 6851191 : xchk_agfl_block_xref(sc, agbno);
669 :
670 6851569 : if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
671 0 : return -ECANCELED;
672 :
673 : return 0;
674 : }
675 :
676 : static int
677 16637694 : xchk_agblock_cmp(
678 : const void *pa,
679 : const void *pb)
680 : {
681 16637694 : const xfs_agblock_t *a = pa;
682 16637694 : const xfs_agblock_t *b = pb;
683 :
684 16637694 : return (int)*a - (int)*b;
685 : }
686 :
687 : /* Cross-reference with the other btrees. */
688 : STATIC void
689 1132279 : xchk_agfl_xref(
690 : struct xfs_scrub *sc)
691 : {
692 1132279 : struct xfs_mount *mp = sc->mp;
693 1132279 : xfs_agblock_t agbno;
694 :
695 1132279 : if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
696 : return;
697 :
698 1132279 : agbno = XFS_AGFL_BLOCK(mp);
699 :
700 1132279 : xchk_ag_btcur_init(sc, &sc->sa);
701 :
702 1132276 : xchk_xref_is_used_space(sc, agbno, 1);
703 1132297 : xchk_xref_is_not_inode_chunk(sc, agbno, 1);
704 1132288 : xchk_xref_is_only_owned_by(sc, agbno, 1, &XFS_RMAP_OINFO_FS);
705 1132293 : xchk_xref_is_not_shared(sc, agbno, 1);
706 1132295 : xchk_xref_is_not_cow_staging(sc, agbno, 1);
707 :
708 : /*
709 : * Scrub teardown will take care of sc->sa for us. Leave sc->sa
710 : * active so that the agfl block xref can use it too.
711 : */
712 : }
713 :
714 : /* Scrub the AGFL. */
715 : int
716 1141437 : xchk_agfl(
717 : struct xfs_scrub *sc)
718 : {
719 1141437 : struct xchk_agfl_info sai = {
720 : .sc = sc,
721 : };
722 1141437 : struct xfs_agf *agf;
723 1141437 : xfs_agnumber_t agno = sc->sm->sm_agno;
724 1141437 : unsigned int i;
725 1141437 : int error;
726 :
727 : /* Lock the AGF and AGI so that nobody can touch this AG. */
728 1141437 : error = xchk_ag_read_headers(sc, agno, &sc->sa);
729 1141451 : if (!xchk_process_error(sc, agno, XFS_AGFL_BLOCK(sc->mp), &error))
730 9160 : return error;
731 1132295 : if (!sc->sa.agf_bp)
732 : return -EFSCORRUPTED;
733 :
734 : /* Try to read the AGFL, and verify its structure if we get it. */
735 1132295 : error = xfs_alloc_read_agfl(sc->sa.pag, sc->tp, &sai.agfl_bp);
736 1132295 : if (!xchk_process_error(sc, agno, XFS_AGFL_BLOCK(sc->mp), &error))
737 0 : return error;
738 1132269 : xchk_buffer_recheck(sc, sai.agfl_bp);
739 :
740 1132281 : xchk_agfl_xref(sc);
741 :
742 1132290 : if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
743 0 : goto out;
744 :
745 : /* Allocate buffer to ensure uniqueness of AGFL entries. */
746 1132290 : agf = sc->sa.agf_bp->b_addr;
747 1132290 : sai.agflcount = be32_to_cpu(agf->agf_flcount);
748 1132290 : if (sai.agflcount > xfs_agfl_size(sc->mp)) {
749 0 : xchk_block_set_corrupt(sc, sc->sa.agf_bp);
750 0 : goto out;
751 : }
752 1132285 : sai.entries = kvcalloc(sai.agflcount, sizeof(xfs_agblock_t),
753 : XCHK_GFP_FLAGS);
754 1132250 : if (!sai.entries) {
755 0 : error = -ENOMEM;
756 0 : goto out;
757 : }
758 :
759 : /* Check the blocks in the AGFL. */
760 1132250 : error = xfs_agfl_walk(sc->mp, sc->sa.agf_bp->b_addr, sai.agfl_bp,
761 : xchk_agfl_block, &sai);
762 1132269 : if (error == -ECANCELED) {
763 0 : error = 0;
764 0 : goto out_free;
765 : }
766 1132269 : if (error)
767 0 : goto out_free;
768 :
769 1132269 : if (sai.agflcount != sai.nr_entries) {
770 0 : xchk_block_set_corrupt(sc, sc->sa.agf_bp);
771 0 : goto out_free;
772 : }
773 :
774 : /* Sort entries, check for duplicates. */
775 1132269 : sort(sai.entries, sai.nr_entries, sizeof(sai.entries[0]),
776 : xchk_agblock_cmp, NULL);
777 7988328 : for (i = 1; i < sai.nr_entries; i++) {
778 5723839 : if (sai.entries[i] == sai.entries[i - 1]) {
779 0 : xchk_block_set_corrupt(sc, sc->sa.agf_bp);
780 0 : break;
781 : }
782 : }
783 :
784 1132220 : out_free:
785 1132220 : kvfree(sai.entries);
786 1132247 : out:
787 1132247 : return error;
788 : }
789 :
790 : /* AGI */
791 :
792 : /* Check agi_count/agi_freecount */
793 : static inline void
794 1147001 : xchk_agi_xref_icounts(
795 : struct xfs_scrub *sc)
796 : {
797 1147001 : struct xfs_agi *agi = sc->sa.agi_bp->b_addr;
798 1147001 : xfs_agino_t icount;
799 1147001 : xfs_agino_t freecount;
800 1147001 : int error;
801 :
802 1147001 : if (!sc->sa.ino_cur)
803 0 : return;
804 :
805 1147001 : error = xfs_ialloc_count_inodes(sc->sa.ino_cur, &icount, &freecount);
806 1146989 : if (!xchk_should_check_xref(sc, &error, &sc->sa.ino_cur))
807 : return;
808 2293974 : if (be32_to_cpu(agi->agi_count) != icount ||
809 2293902 : be32_to_cpu(agi->agi_freecount) != freecount)
810 36 : xchk_block_xref_set_corrupt(sc, sc->sa.agi_bp);
811 : }
812 :
813 : /* Check agi_[fi]blocks against tree size */
814 : static inline void
815 1146984 : xchk_agi_xref_fiblocks(
816 : struct xfs_scrub *sc)
817 : {
818 1146984 : struct xfs_agi *agi = sc->sa.agi_bp->b_addr;
819 1146984 : xfs_agblock_t blocks;
820 1146984 : int error = 0;
821 :
822 1146984 : if (!xfs_has_inobtcounts(sc->mp))
823 4 : return;
824 :
825 1146980 : if (sc->sa.ino_cur) {
826 1146984 : error = xfs_btree_count_blocks(sc->sa.ino_cur, &blocks);
827 1146989 : if (!xchk_should_check_xref(sc, &error, &sc->sa.ino_cur))
828 : return;
829 2293988 : if (blocks != be32_to_cpu(agi->agi_iblocks))
830 0 : xchk_block_xref_set_corrupt(sc, sc->sa.agi_bp);
831 : }
832 :
833 1146990 : if (sc->sa.fino_cur) {
834 1146995 : error = xfs_btree_count_blocks(sc->sa.fino_cur, &blocks);
835 1146995 : if (!xchk_should_check_xref(sc, &error, &sc->sa.fino_cur))
836 : return;
837 2293992 : if (blocks != be32_to_cpu(agi->agi_fblocks))
838 0 : xchk_block_xref_set_corrupt(sc, sc->sa.agi_bp);
839 : }
840 : }
841 :
842 : /* Cross-reference with the other btrees. */
843 : STATIC void
844 1146990 : xchk_agi_xref(
845 : struct xfs_scrub *sc)
846 : {
847 1146990 : struct xfs_mount *mp = sc->mp;
848 1146990 : xfs_agblock_t agbno;
849 :
850 1146990 : if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
851 : return;
852 :
853 1146990 : agbno = XFS_AGI_BLOCK(mp);
854 :
855 1146990 : xchk_ag_btcur_init(sc, &sc->sa);
856 :
857 1146980 : xchk_xref_is_used_space(sc, agbno, 1);
858 1146999 : xchk_xref_is_not_inode_chunk(sc, agbno, 1);
859 1146983 : xchk_agi_xref_icounts(sc);
860 1146931 : xchk_xref_is_only_owned_by(sc, agbno, 1, &XFS_RMAP_OINFO_FS);
861 1147002 : xchk_xref_is_not_shared(sc, agbno, 1);
862 1146998 : xchk_xref_is_not_cow_staging(sc, agbno, 1);
863 1146999 : xchk_agi_xref_fiblocks(sc);
864 :
865 : /* scrub teardown will take care of sc->sa for us */
866 : }
867 :
868 : /* Scrub the AGI. */
869 : int
870 1155657 : xchk_agi(
871 : struct xfs_scrub *sc)
872 : {
873 1155657 : struct xfs_mount *mp = sc->mp;
874 1155657 : struct xfs_agi *agi;
875 1155657 : struct xfs_perag *pag;
876 1155657 : struct xfs_ino_geometry *igeo = M_IGEO(sc->mp);
877 1155657 : xfs_agnumber_t agno = sc->sm->sm_agno;
878 1155657 : xfs_agblock_t agbno;
879 1155657 : xfs_agblock_t eoag;
880 1155657 : xfs_agino_t agino;
881 1155657 : xfs_agino_t first_agino;
882 1155657 : xfs_agino_t last_agino;
883 1155657 : xfs_agino_t icount;
884 1155657 : int i;
885 1155657 : int level;
886 1155657 : int error = 0;
887 :
888 1155657 : error = xchk_ag_read_headers(sc, agno, &sc->sa);
889 1155678 : if (!xchk_process_error(sc, agno, XFS_AGI_BLOCK(sc->mp), &error))
890 8676 : goto out;
891 1146962 : xchk_buffer_recheck(sc, sc->sa.agi_bp);
892 :
893 1146960 : agi = sc->sa.agi_bp->b_addr;
894 1146960 : pag = sc->sa.pag;
895 :
896 : /* Check the AG length */
897 1146960 : eoag = be32_to_cpu(agi->agi_length);
898 1146960 : if (eoag != pag->block_count)
899 0 : xchk_block_set_corrupt(sc, sc->sa.agi_bp);
900 :
901 : /* Check btree roots and levels */
902 1146962 : agbno = be32_to_cpu(agi->agi_root);
903 1146962 : if (!xfs_verify_agbno(pag, agbno))
904 0 : xchk_block_set_corrupt(sc, sc->sa.agi_bp);
905 :
906 1146965 : level = be32_to_cpu(agi->agi_level);
907 1146965 : if (level <= 0 || level > igeo->inobt_maxlevels)
908 0 : xchk_block_set_corrupt(sc, sc->sa.agi_bp);
909 :
910 1146976 : if (xfs_has_finobt(mp)) {
911 1146972 : agbno = be32_to_cpu(agi->agi_free_root);
912 1146972 : if (!xfs_verify_agbno(pag, agbno))
913 1 : xchk_block_set_corrupt(sc, sc->sa.agi_bp);
914 :
915 1146956 : level = be32_to_cpu(agi->agi_free_level);
916 1146956 : if (level <= 0 || level > igeo->inobt_maxlevels)
917 0 : xchk_block_set_corrupt(sc, sc->sa.agi_bp);
918 : }
919 :
920 : /* Check inode counters */
921 1146960 : xfs_agino_range(mp, agno, &first_agino, &last_agino);
922 1146940 : icount = be32_to_cpu(agi->agi_count);
923 2293834 : if (icount > last_agino - first_agino + 1 ||
924 1146894 : icount < be32_to_cpu(agi->agi_freecount))
925 47 : xchk_block_set_corrupt(sc, sc->sa.agi_bp);
926 :
927 : /* Check inode pointers */
928 1146850 : agino = be32_to_cpu(agi->agi_newino);
929 1146850 : if (!xfs_verify_agino_or_null(pag, agino))
930 1 : xchk_block_set_corrupt(sc, sc->sa.agi_bp);
931 :
932 1146939 : agino = be32_to_cpu(agi->agi_dirino);
933 1146939 : if (!xfs_verify_agino_or_null(pag, agino))
934 0 : xchk_block_set_corrupt(sc, sc->sa.agi_bp);
935 :
936 : /* Check unlinked inode buckets */
937 74537754 : for (i = 0; i < XFS_AGI_UNLINKED_BUCKETS; i++) {
938 73390830 : agino = be32_to_cpu(agi->agi_unlinked[i]);
939 73388953 : if (!xfs_verify_agino_or_null(pag, agino))
940 0 : xchk_block_set_corrupt(sc, sc->sa.agi_bp);
941 : }
942 :
943 1146924 : if (agi->agi_pad32 != cpu_to_be32(0))
944 0 : xchk_block_set_corrupt(sc, sc->sa.agi_bp);
945 :
946 : /* Do the incore counters match? */
947 2293848 : if (pag->pagi_count != be32_to_cpu(agi->agi_count))
948 0 : xchk_block_set_corrupt(sc, sc->sa.agi_bp);
949 2293886 : if (pag->pagi_freecount != be32_to_cpu(agi->agi_freecount))
950 0 : xchk_block_set_corrupt(sc, sc->sa.agi_bp);
951 :
952 1146943 : xchk_agi_xref(sc);
953 1155660 : out:
954 1155660 : return error;
955 : }
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