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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_log_format.h"
14#include "xfs_trans.h"
15#include "xfs_ag.h"
16#include "xfs_inode.h"
17#include "xfs_ialloc.h"
18#include "xfs_icache.h"
19#include "xfs_da_format.h"
20#include "xfs_reflink.h"
21#include "xfs_rmap.h"
22#include "xfs_bmap_util.h"
23#include "xfs_rtbitmap.h"
24#include "scrub/scrub.h"
25#include "scrub/common.h"
26#include "scrub/btree.h"
27#include "scrub/trace.h"
28#include "scrub/repair.h"
29
30/* Prepare the attached inode for scrubbing. */
31static inline int
32xchk_prepare_iscrub(
33 struct xfs_scrub *sc)
34{
35 int error;
36
37 xchk_ilock(sc, XFS_IOLOCK_EXCL);
38
39 error = xchk_trans_alloc(sc, 0);
40 if (error)
41 return error;
42
43 error = xchk_ino_dqattach(sc);
44 if (error)
45 return error;
46
47 xchk_ilock(sc, XFS_ILOCK_EXCL);
48 return 0;
49}
50
51/* Install this scrub-by-handle inode and prepare it for scrubbing. */
52static inline int
53xchk_install_handle_iscrub(
54 struct xfs_scrub *sc,
55 struct xfs_inode *ip)
56{
57 int error;
58
59 error = xchk_install_handle_inode(sc, ip);
60 if (error)
61 return error;
62
63 return xchk_prepare_iscrub(sc);
64}
65
66/*
67 * Grab total control of the inode metadata. In the best case, we grab the
68 * incore inode and take all locks on it. If the incore inode cannot be
69 * constructed due to corruption problems, lock the AGI so that we can single
70 * step the loading process to fix everything that can go wrong.
71 */
72int
73xchk_setup_inode(
74 struct xfs_scrub *sc)
75{
76 struct xfs_imap imap;
77 struct xfs_inode *ip;
78 struct xfs_mount *mp = sc->mp;
79 struct xfs_inode *ip_in = XFS_I(file_inode(sc->file));
80 struct xfs_buf *agi_bp;
81 struct xfs_perag *pag;
82 xfs_agnumber_t agno = XFS_INO_TO_AGNO(mp, sc->sm->sm_ino);
83 int error;
84
85 if (xchk_need_intent_drain(sc))
86 xchk_fsgates_enable(sc, XCHK_FSGATES_DRAIN);
87
88 /* We want to scan the opened inode, so lock it and exit. */
89 if (sc->sm->sm_ino == 0 || sc->sm->sm_ino == ip_in->i_ino) {
90 error = xchk_install_live_inode(sc, ip_in);
91 if (error)
92 return error;
93
94 return xchk_prepare_iscrub(sc);
95 }
96
97 /* Reject internal metadata files and obviously bad inode numbers. */
98 if (xfs_internal_inum(mp, sc->sm->sm_ino))
99 return -ENOENT;
100 if (!xfs_verify_ino(sc->mp, sc->sm->sm_ino))
101 return -ENOENT;
102
103 /* Try a safe untrusted iget. */
104 error = xchk_iget_safe(sc, sc->sm->sm_ino, &ip);
105 if (!error)
106 return xchk_install_handle_iscrub(sc, ip);
107 if (error == -ENOENT)
108 return error;
109 if (error != -EFSCORRUPTED && error != -EFSBADCRC && error != -EINVAL)
110 goto out_error;
111
112 /*
113 * EINVAL with IGET_UNTRUSTED probably means one of several things:
114 * userspace gave us an inode number that doesn't correspond to fs
115 * space; the inode btree lacks a record for this inode; or there is
116 * a record, and it says this inode is free.
117 *
118 * EFSCORRUPTED/EFSBADCRC could mean that the inode was mappable, but
119 * some other metadata corruption (e.g. inode forks) prevented
120 * instantiation of the incore inode. Or it could mean the inobt is
121 * corrupt.
122 *
123 * We want to look up this inode in the inobt directly to distinguish
124 * three different scenarios: (1) the inobt says the inode is free,
125 * in which case there's nothing to do; (2) the inobt is corrupt so we
126 * should flag the corruption and exit to userspace to let it fix the
127 * inobt; and (3) the inobt says the inode is allocated, but loading it
128 * failed due to corruption.
129 *
130 * Allocate a transaction and grab the AGI to prevent inobt activity in
131 * this AG. Retry the iget in case someone allocated a new inode after
132 * the first iget failed.
133 */
134 error = xchk_trans_alloc(sc, 0);
135 if (error)
136 goto out_error;
137
138 error = xchk_iget_agi(sc, sc->sm->sm_ino, &agi_bp, &ip);
139 if (error == 0) {
140 /* Actually got the incore inode, so install it and proceed. */
141 xchk_trans_cancel(sc);
142 return xchk_install_handle_iscrub(sc, ip);
143 }
144 if (error == -ENOENT)
145 goto out_gone;
146 if (error != -EFSCORRUPTED && error != -EFSBADCRC && error != -EINVAL)
147 goto out_cancel;
148
149 /* Ensure that we have protected against inode allocation/freeing. */
150 if (agi_bp == NULL) {
151 ASSERT(agi_bp != NULL);
152 error = -ECANCELED;
153 goto out_cancel;
154 }
155
156 /*
157 * Untrusted iget failed a second time. Let's try an inobt lookup.
158 * If the inobt doesn't think this is an allocated inode then we'll
159 * return ENOENT to signal that the check can be skipped.
160 *
161 * If the lookup signals corruption, we'll mark this inode corrupt and
162 * exit to userspace. There's little chance of fixing anything until
163 * the inobt is straightened out, but there's nothing we can do here.
164 *
165 * If the lookup encounters a runtime error, exit to userspace.
166 */
167 pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, sc->sm->sm_ino));
168 if (!pag) {
169 error = -EFSCORRUPTED;
170 goto out_cancel;
171 }
172
173 error = xfs_imap(pag, sc->tp, sc->sm->sm_ino, &imap,
174 XFS_IGET_UNTRUSTED);
175 xfs_perag_put(pag);
176 if (error == -EINVAL || error == -ENOENT)
177 goto out_gone;
178 if (error)
179 goto out_cancel;
180
181 /*
182 * The lookup succeeded. Chances are the ondisk inode is corrupt and
183 * preventing iget from reading it. Retain the scrub transaction and
184 * the AGI buffer to prevent anyone from allocating or freeing inodes.
185 * This ensures that we preserve the inconsistency between the inobt
186 * saying the inode is allocated and the icache being unable to load
187 * the inode until we can flag the corruption in xchk_inode. The
188 * scrub function has to note the corruption, since we're not really
189 * supposed to do that from the setup function. Save the mapping to
190 * make repairs to the ondisk inode buffer.
191 */
192 if (xchk_could_repair(sc))
193 xrep_setup_inode(sc, &imap);
194 return 0;
195
196out_cancel:
197 xchk_trans_cancel(sc);
198out_error:
199 trace_xchk_op_error(sc, agno, XFS_INO_TO_AGBNO(mp, sc->sm->sm_ino),
200 error, __return_address);
201 return error;
202out_gone:
203 /* The file is gone, so there's nothing to check. */
204 xchk_trans_cancel(sc);
205 return -ENOENT;
206}
207
208/* Inode core */
209
210/* Validate di_extsize hint. */
211STATIC void
212xchk_inode_extsize(
213 struct xfs_scrub *sc,
214 struct xfs_dinode *dip,
215 xfs_ino_t ino,
216 uint16_t mode,
217 uint16_t flags)
218{
219 xfs_failaddr_t fa;
220 uint32_t value = be32_to_cpu(dip->di_extsize);
221
222 fa = xfs_inode_validate_extsize(sc->mp, value, mode, flags);
223 if (fa)
224 xchk_ino_set_corrupt(sc, ino);
225
226 /*
227 * XFS allows a sysadmin to change the rt extent size when adding a rt
228 * section to a filesystem after formatting. If there are any
229 * directories with extszinherit and rtinherit set, the hint could
230 * become misaligned with the new rextsize. The verifier doesn't check
231 * this, because we allow rtinherit directories even without an rt
232 * device. Flag this as an administrative warning since we will clean
233 * this up eventually.
234 */
235 if ((flags & XFS_DIFLAG_RTINHERIT) &&
236 (flags & XFS_DIFLAG_EXTSZINHERIT) &&
237 xfs_extlen_to_rtxmod(sc->mp, value) > 0)
238 xchk_ino_set_warning(sc, ino);
239}
240
241/*
242 * Validate di_cowextsize hint.
243 *
244 * The rules are documented at xfs_ioctl_setattr_check_cowextsize().
245 * These functions must be kept in sync with each other.
246 */
247STATIC void
248xchk_inode_cowextsize(
249 struct xfs_scrub *sc,
250 struct xfs_dinode *dip,
251 xfs_ino_t ino,
252 uint16_t mode,
253 uint16_t flags,
254 uint64_t flags2)
255{
256 xfs_failaddr_t fa;
257
258 fa = xfs_inode_validate_cowextsize(sc->mp,
259 be32_to_cpu(dip->di_cowextsize), mode, flags,
260 flags2);
261 if (fa)
262 xchk_ino_set_corrupt(sc, ino);
263}
264
265/* Make sure the di_flags make sense for the inode. */
266STATIC void
267xchk_inode_flags(
268 struct xfs_scrub *sc,
269 struct xfs_dinode *dip,
270 xfs_ino_t ino,
271 uint16_t mode,
272 uint16_t flags)
273{
274 struct xfs_mount *mp = sc->mp;
275
276 /* di_flags are all taken, last bit cannot be used */
277 if (flags & ~XFS_DIFLAG_ANY)
278 goto bad;
279
280 /* rt flags require rt device */
281 if ((flags & XFS_DIFLAG_REALTIME) && !mp->m_rtdev_targp)
282 goto bad;
283
284 /* new rt bitmap flag only valid for rbmino */
285 if ((flags & XFS_DIFLAG_NEWRTBM) && ino != mp->m_sb.sb_rbmino)
286 goto bad;
287
288 /* directory-only flags */
289 if ((flags & (XFS_DIFLAG_RTINHERIT |
290 XFS_DIFLAG_EXTSZINHERIT |
291 XFS_DIFLAG_PROJINHERIT |
292 XFS_DIFLAG_NOSYMLINKS)) &&
293 !S_ISDIR(mode))
294 goto bad;
295
296 /* file-only flags */
297 if ((flags & (XFS_DIFLAG_REALTIME | FS_XFLAG_EXTSIZE)) &&
298 !S_ISREG(mode))
299 goto bad;
300
301 /* filestreams and rt make no sense */
302 if ((flags & XFS_DIFLAG_FILESTREAM) && (flags & XFS_DIFLAG_REALTIME))
303 goto bad;
304
305 return;
306bad:
307 xchk_ino_set_corrupt(sc, ino);
308}
309
310/* Make sure the di_flags2 make sense for the inode. */
311STATIC void
312xchk_inode_flags2(
313 struct xfs_scrub *sc,
314 struct xfs_dinode *dip,
315 xfs_ino_t ino,
316 uint16_t mode,
317 uint16_t flags,
318 uint64_t flags2)
319{
320 struct xfs_mount *mp = sc->mp;
321
322 /* Unknown di_flags2 could be from a future kernel */
323 if (flags2 & ~XFS_DIFLAG2_ANY)
324 xchk_ino_set_warning(sc, ino);
325
326 /* reflink flag requires reflink feature */
327 if ((flags2 & XFS_DIFLAG2_REFLINK) &&
328 !xfs_has_reflink(mp))
329 goto bad;
330
331 /* cowextsize flag is checked w.r.t. mode separately */
332
333 /* file/dir-only flags */
334 if ((flags2 & XFS_DIFLAG2_DAX) && !(S_ISREG(mode) || S_ISDIR(mode)))
335 goto bad;
336
337 /* file-only flags */
338 if ((flags2 & XFS_DIFLAG2_REFLINK) && !S_ISREG(mode))
339 goto bad;
340
341 /* realtime and reflink make no sense, currently */
342 if ((flags & XFS_DIFLAG_REALTIME) && (flags2 & XFS_DIFLAG2_REFLINK))
343 goto bad;
344
345 /* no bigtime iflag without the bigtime feature */
346 if (xfs_dinode_has_bigtime(dip) && !xfs_has_bigtime(mp))
347 goto bad;
348
349 /* no large extent counts without the filesystem feature */
350 if ((flags2 & XFS_DIFLAG2_NREXT64) && !xfs_has_large_extent_counts(mp))
351 goto bad;
352
353 return;
354bad:
355 xchk_ino_set_corrupt(sc, ino);
356}
357
358static inline void
359xchk_dinode_nsec(
360 struct xfs_scrub *sc,
361 xfs_ino_t ino,
362 struct xfs_dinode *dip,
363 const xfs_timestamp_t ts)
364{
365 struct timespec64 tv;
366
367 tv = xfs_inode_from_disk_ts(dip, ts);
368 if (tv.tv_nsec < 0 || tv.tv_nsec >= NSEC_PER_SEC)
369 xchk_ino_set_corrupt(sc, ino);
370}
371
372/* Scrub all the ondisk inode fields. */
373STATIC void
374xchk_dinode(
375 struct xfs_scrub *sc,
376 struct xfs_dinode *dip,
377 xfs_ino_t ino)
378{
379 struct xfs_mount *mp = sc->mp;
380 size_t fork_recs;
381 unsigned long long isize;
382 uint64_t flags2;
383 xfs_extnum_t nextents;
384 xfs_extnum_t naextents;
385 prid_t prid;
386 uint16_t flags;
387 uint16_t mode;
388
389 flags = be16_to_cpu(dip->di_flags);
390 if (dip->di_version >= 3)
391 flags2 = be64_to_cpu(dip->di_flags2);
392 else
393 flags2 = 0;
394
395 /* di_mode */
396 mode = be16_to_cpu(dip->di_mode);
397 switch (mode & S_IFMT) {
398 case S_IFLNK:
399 case S_IFREG:
400 case S_IFDIR:
401 case S_IFCHR:
402 case S_IFBLK:
403 case S_IFIFO:
404 case S_IFSOCK:
405 /* mode is recognized */
406 break;
407 default:
408 xchk_ino_set_corrupt(sc, ino);
409 break;
410 }
411
412 /* v1/v2 fields */
413 switch (dip->di_version) {
414 case 1:
415 /*
416 * We autoconvert v1 inodes into v2 inodes on writeout,
417 * so just mark this inode for preening.
418 */
419 xchk_ino_set_preen(sc, ino);
420 prid = 0;
421 break;
422 case 2:
423 case 3:
424 if (dip->di_onlink != 0)
425 xchk_ino_set_corrupt(sc, ino);
426
427 if (dip->di_mode == 0 && sc->ip)
428 xchk_ino_set_corrupt(sc, ino);
429
430 if (dip->di_projid_hi != 0 &&
431 !xfs_has_projid32(mp))
432 xchk_ino_set_corrupt(sc, ino);
433
434 prid = be16_to_cpu(dip->di_projid_lo);
435 break;
436 default:
437 xchk_ino_set_corrupt(sc, ino);
438 return;
439 }
440
441 if (xfs_has_projid32(mp))
442 prid |= (prid_t)be16_to_cpu(dip->di_projid_hi) << 16;
443
444 /*
445 * di_uid/di_gid -- -1 isn't invalid, but there's no way that
446 * userspace could have created that.
447 */
448 if (dip->di_uid == cpu_to_be32(-1U) ||
449 dip->di_gid == cpu_to_be32(-1U))
450 xchk_ino_set_warning(sc, ino);
451
452 /*
453 * project id of -1 isn't supposed to be valid, but the kernel didn't
454 * always validate that.
455 */
456 if (prid == -1U)
457 xchk_ino_set_warning(sc, ino);
458
459 /* di_format */
460 switch (dip->di_format) {
461 case XFS_DINODE_FMT_DEV:
462 if (!S_ISCHR(mode) && !S_ISBLK(mode) &&
463 !S_ISFIFO(mode) && !S_ISSOCK(mode))
464 xchk_ino_set_corrupt(sc, ino);
465 break;
466 case XFS_DINODE_FMT_LOCAL:
467 if (!S_ISDIR(mode) && !S_ISLNK(mode))
468 xchk_ino_set_corrupt(sc, ino);
469 break;
470 case XFS_DINODE_FMT_EXTENTS:
471 if (!S_ISREG(mode) && !S_ISDIR(mode) && !S_ISLNK(mode))
472 xchk_ino_set_corrupt(sc, ino);
473 break;
474 case XFS_DINODE_FMT_BTREE:
475 if (!S_ISREG(mode) && !S_ISDIR(mode))
476 xchk_ino_set_corrupt(sc, ino);
477 break;
478 case XFS_DINODE_FMT_UUID:
479 default:
480 xchk_ino_set_corrupt(sc, ino);
481 break;
482 }
483
484 /* di_[amc]time.nsec */
485 xchk_dinode_nsec(sc, ino, dip, dip->di_atime);
486 xchk_dinode_nsec(sc, ino, dip, dip->di_mtime);
487 xchk_dinode_nsec(sc, ino, dip, dip->di_ctime);
488
489 /*
490 * di_size. xfs_dinode_verify checks for things that screw up
491 * the VFS such as the upper bit being set and zero-length
492 * symlinks/directories, but we can do more here.
493 */
494 isize = be64_to_cpu(dip->di_size);
495 if (isize & (1ULL << 63))
496 xchk_ino_set_corrupt(sc, ino);
497
498 /* Devices, fifos, and sockets must have zero size */
499 if (!S_ISDIR(mode) && !S_ISREG(mode) && !S_ISLNK(mode) && isize != 0)
500 xchk_ino_set_corrupt(sc, ino);
501
502 /* Directories can't be larger than the data section size (32G) */
503 if (S_ISDIR(mode) && (isize == 0 || isize >= XFS_DIR2_SPACE_SIZE))
504 xchk_ino_set_corrupt(sc, ino);
505
506 /* Symlinks can't be larger than SYMLINK_MAXLEN */
507 if (S_ISLNK(mode) && (isize == 0 || isize >= XFS_SYMLINK_MAXLEN))
508 xchk_ino_set_corrupt(sc, ino);
509
510 /*
511 * Warn if the running kernel can't handle the kinds of offsets
512 * needed to deal with the file size. In other words, if the
513 * pagecache can't cache all the blocks in this file due to
514 * overly large offsets, flag the inode for admin review.
515 */
516 if (isize > mp->m_super->s_maxbytes)
517 xchk_ino_set_warning(sc, ino);
518
519 /* di_nblocks */
520 if (flags2 & XFS_DIFLAG2_REFLINK) {
521 ; /* nblocks can exceed dblocks */
522 } else if (flags & XFS_DIFLAG_REALTIME) {
523 /*
524 * nblocks is the sum of data extents (in the rtdev),
525 * attr extents (in the datadev), and both forks' bmbt
526 * blocks (in the datadev). This clumsy check is the
527 * best we can do without cross-referencing with the
528 * inode forks.
529 */
530 if (be64_to_cpu(dip->di_nblocks) >=
531 mp->m_sb.sb_dblocks + mp->m_sb.sb_rblocks)
532 xchk_ino_set_corrupt(sc, ino);
533 } else {
534 if (be64_to_cpu(dip->di_nblocks) >= mp->m_sb.sb_dblocks)
535 xchk_ino_set_corrupt(sc, ino);
536 }
537
538 xchk_inode_flags(sc, dip, ino, mode, flags);
539
540 xchk_inode_extsize(sc, dip, ino, mode, flags);
541
542 nextents = xfs_dfork_data_extents(dip);
543 naextents = xfs_dfork_attr_extents(dip);
544
545 /* di_nextents */
546 fork_recs = XFS_DFORK_DSIZE(dip, mp) / sizeof(struct xfs_bmbt_rec);
547 switch (dip->di_format) {
548 case XFS_DINODE_FMT_EXTENTS:
549 if (nextents > fork_recs)
550 xchk_ino_set_corrupt(sc, ino);
551 break;
552 case XFS_DINODE_FMT_BTREE:
553 if (nextents <= fork_recs)
554 xchk_ino_set_corrupt(sc, ino);
555 break;
556 default:
557 if (nextents != 0)
558 xchk_ino_set_corrupt(sc, ino);
559 break;
560 }
561
562 /* di_forkoff */
563 if (XFS_DFORK_BOFF(dip) >= mp->m_sb.sb_inodesize)
564 xchk_ino_set_corrupt(sc, ino);
565 if (naextents != 0 && dip->di_forkoff == 0)
566 xchk_ino_set_corrupt(sc, ino);
567 if (dip->di_forkoff == 0 && dip->di_aformat != XFS_DINODE_FMT_EXTENTS)
568 xchk_ino_set_corrupt(sc, ino);
569
570 /* di_aformat */
571 if (dip->di_aformat != XFS_DINODE_FMT_LOCAL &&
572 dip->di_aformat != XFS_DINODE_FMT_EXTENTS &&
573 dip->di_aformat != XFS_DINODE_FMT_BTREE)
574 xchk_ino_set_corrupt(sc, ino);
575
576 /* di_anextents */
577 fork_recs = XFS_DFORK_ASIZE(dip, mp) / sizeof(struct xfs_bmbt_rec);
578 switch (dip->di_aformat) {
579 case XFS_DINODE_FMT_EXTENTS:
580 if (naextents > fork_recs)
581 xchk_ino_set_corrupt(sc, ino);
582 break;
583 case XFS_DINODE_FMT_BTREE:
584 if (naextents <= fork_recs)
585 xchk_ino_set_corrupt(sc, ino);
586 break;
587 default:
588 if (naextents != 0)
589 xchk_ino_set_corrupt(sc, ino);
590 }
591
592 if (dip->di_version >= 3) {
593 xchk_dinode_nsec(sc, ino, dip, dip->di_crtime);
594 xchk_inode_flags2(sc, dip, ino, mode, flags, flags2);
595 xchk_inode_cowextsize(sc, dip, ino, mode, flags,
596 flags2);
597 }
598}
599
600/*
601 * Make sure the finobt doesn't think this inode is free.
602 * We don't have to check the inobt ourselves because we got the inode via
603 * IGET_UNTRUSTED, which checks the inobt for us.
604 */
605static void
606xchk_inode_xref_finobt(
607 struct xfs_scrub *sc,
608 xfs_ino_t ino)
609{
610 struct xfs_inobt_rec_incore rec;
611 xfs_agino_t agino;
612 int has_record;
613 int error;
614
615 if (!sc->sa.fino_cur || xchk_skip_xref(sc->sm))
616 return;
617
618 agino = XFS_INO_TO_AGINO(sc->mp, ino);
619
620 /*
621 * Try to get the finobt record. If we can't get it, then we're
622 * in good shape.
623 */
624 error = xfs_inobt_lookup(sc->sa.fino_cur, agino, XFS_LOOKUP_LE,
625 &has_record);
626 if (!xchk_should_check_xref(sc, &error, &sc->sa.fino_cur) ||
627 !has_record)
628 return;
629
630 error = xfs_inobt_get_rec(sc->sa.fino_cur, &rec, &has_record);
631 if (!xchk_should_check_xref(sc, &error, &sc->sa.fino_cur) ||
632 !has_record)
633 return;
634
635 /*
636 * Otherwise, make sure this record either doesn't cover this inode,
637 * or that it does but it's marked present.
638 */
639 if (rec.ir_startino > agino ||
640 rec.ir_startino + XFS_INODES_PER_CHUNK <= agino)
641 return;
642
643 if (rec.ir_free & XFS_INOBT_MASK(agino - rec.ir_startino))
644 xchk_btree_xref_set_corrupt(sc, sc->sa.fino_cur, 0);
645}
646
647/* Cross reference the inode fields with the forks. */
648STATIC void
649xchk_inode_xref_bmap(
650 struct xfs_scrub *sc,
651 struct xfs_dinode *dip)
652{
653 xfs_extnum_t nextents;
654 xfs_filblks_t count;
655 xfs_filblks_t acount;
656 int error;
657
658 if (xchk_skip_xref(sc->sm))
659 return;
660
661 /* Walk all the extents to check nextents/naextents/nblocks. */
662 error = xfs_bmap_count_blocks(sc->tp, sc->ip, XFS_DATA_FORK,
663 &nextents, &count);
664 if (!xchk_should_check_xref(sc, &error, NULL))
665 return;
666 if (nextents < xfs_dfork_data_extents(dip))
667 xchk_ino_xref_set_corrupt(sc, sc->ip->i_ino);
668
669 error = xfs_bmap_count_blocks(sc->tp, sc->ip, XFS_ATTR_FORK,
670 &nextents, &acount);
671 if (!xchk_should_check_xref(sc, &error, NULL))
672 return;
673 if (nextents != xfs_dfork_attr_extents(dip))
674 xchk_ino_xref_set_corrupt(sc, sc->ip->i_ino);
675
676 /* Check nblocks against the inode. */
677 if (count + acount != be64_to_cpu(dip->di_nblocks))
678 xchk_ino_xref_set_corrupt(sc, sc->ip->i_ino);
679}
680
681/* Cross-reference with the other btrees. */
682STATIC void
683xchk_inode_xref(
684 struct xfs_scrub *sc,
685 xfs_ino_t ino,
686 struct xfs_dinode *dip)
687{
688 xfs_agnumber_t agno;
689 xfs_agblock_t agbno;
690 int error;
691
692 if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
693 return;
694
695 agno = XFS_INO_TO_AGNO(sc->mp, ino);
696 agbno = XFS_INO_TO_AGBNO(sc->mp, ino);
697
698 error = xchk_ag_init_existing(sc, agno, &sc->sa);
699 if (!xchk_xref_process_error(sc, agno, agbno, &error))
700 goto out_free;
701
702 xchk_xref_is_used_space(sc, agbno, 1);
703 xchk_inode_xref_finobt(sc, ino);
704 xchk_xref_is_only_owned_by(sc, agbno, 1, &XFS_RMAP_OINFO_INODES);
705 xchk_xref_is_not_shared(sc, agbno, 1);
706 xchk_xref_is_not_cow_staging(sc, agbno, 1);
707 xchk_inode_xref_bmap(sc, dip);
708
709out_free:
710 xchk_ag_free(sc, &sc->sa);
711}
712
713/*
714 * If the reflink iflag disagrees with a scan for shared data fork extents,
715 * either flag an error (shared extents w/ no flag) or a preen (flag set w/o
716 * any shared extents). We already checked for reflink iflag set on a non
717 * reflink filesystem.
718 */
719static void
720xchk_inode_check_reflink_iflag(
721 struct xfs_scrub *sc,
722 xfs_ino_t ino)
723{
724 struct xfs_mount *mp = sc->mp;
725 bool has_shared;
726 int error;
727
728 if (!xfs_has_reflink(mp))
729 return;
730
731 error = xfs_reflink_inode_has_shared_extents(sc->tp, sc->ip,
732 &has_shared);
733 if (!xchk_xref_process_error(sc, XFS_INO_TO_AGNO(mp, ino),
734 XFS_INO_TO_AGBNO(mp, ino), &error))
735 return;
736 if (xfs_is_reflink_inode(sc->ip) && !has_shared)
737 xchk_ino_set_preen(sc, ino);
738 else if (!xfs_is_reflink_inode(sc->ip) && has_shared)
739 xchk_ino_set_corrupt(sc, ino);
740}
741
742/* Scrub an inode. */
743int
744xchk_inode(
745 struct xfs_scrub *sc)
746{
747 struct xfs_dinode di;
748 int error = 0;
749
750 /*
751 * If sc->ip is NULL, that means that the setup function called
752 * xfs_iget to look up the inode. xfs_iget returned a EFSCORRUPTED
753 * and a NULL inode, so flag the corruption error and return.
754 */
755 if (!sc->ip) {
756 xchk_ino_set_corrupt(sc, sc->sm->sm_ino);
757 return 0;
758 }
759
760 /* Scrub the inode core. */
761 xfs_inode_to_disk(sc->ip, &di, 0);
762 xchk_dinode(sc, &di, sc->ip->i_ino);
763 if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
764 goto out;
765
766 /*
767 * Look for discrepancies between file's data blocks and the reflink
768 * iflag. We already checked the iflag against the file mode when
769 * we scrubbed the dinode.
770 */
771 if (S_ISREG(VFS_I(sc->ip)->i_mode))
772 xchk_inode_check_reflink_iflag(sc, sc->ip->i_ino);
773
774 xchk_inode_xref(sc, sc->ip->i_ino, &di);
775out:
776 return error;
777}
1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * Copyright (C) 2017 Oracle. All Rights Reserved.
4 * Author: Darrick J. Wong <darrick.wong@oracle.com>
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_log_format.h"
14#include "xfs_inode.h"
15#include "xfs_ialloc.h"
16#include "xfs_da_format.h"
17#include "xfs_reflink.h"
18#include "xfs_rmap.h"
19#include "xfs_bmap_util.h"
20#include "scrub/scrub.h"
21#include "scrub/common.h"
22#include "scrub/btree.h"
23
24/*
25 * Grab total control of the inode metadata. It doesn't matter here if
26 * the file data is still changing; exclusive access to the metadata is
27 * the goal.
28 */
29int
30xchk_setup_inode(
31 struct xfs_scrub *sc,
32 struct xfs_inode *ip)
33{
34 int error;
35
36 /*
37 * Try to get the inode. If the verifiers fail, we try again
38 * in raw mode.
39 */
40 error = xchk_get_inode(sc, ip);
41 switch (error) {
42 case 0:
43 break;
44 case -EFSCORRUPTED:
45 case -EFSBADCRC:
46 return xchk_trans_alloc(sc, 0);
47 default:
48 return error;
49 }
50
51 /* Got the inode, lock it and we're ready to go. */
52 sc->ilock_flags = XFS_IOLOCK_EXCL | XFS_MMAPLOCK_EXCL;
53 xfs_ilock(sc->ip, sc->ilock_flags);
54 error = xchk_trans_alloc(sc, 0);
55 if (error)
56 goto out;
57 sc->ilock_flags |= XFS_ILOCK_EXCL;
58 xfs_ilock(sc->ip, XFS_ILOCK_EXCL);
59
60out:
61 /* scrub teardown will unlock and release the inode for us */
62 return error;
63}
64
65/* Inode core */
66
67/* Validate di_extsize hint. */
68STATIC void
69xchk_inode_extsize(
70 struct xfs_scrub *sc,
71 struct xfs_dinode *dip,
72 xfs_ino_t ino,
73 uint16_t mode,
74 uint16_t flags)
75{
76 xfs_failaddr_t fa;
77
78 fa = xfs_inode_validate_extsize(sc->mp, be32_to_cpu(dip->di_extsize),
79 mode, flags);
80 if (fa)
81 xchk_ino_set_corrupt(sc, ino);
82}
83
84/*
85 * Validate di_cowextsize hint.
86 *
87 * The rules are documented at xfs_ioctl_setattr_check_cowextsize().
88 * These functions must be kept in sync with each other.
89 */
90STATIC void
91xchk_inode_cowextsize(
92 struct xfs_scrub *sc,
93 struct xfs_dinode *dip,
94 xfs_ino_t ino,
95 uint16_t mode,
96 uint16_t flags,
97 uint64_t flags2)
98{
99 xfs_failaddr_t fa;
100
101 fa = xfs_inode_validate_cowextsize(sc->mp,
102 be32_to_cpu(dip->di_cowextsize), mode, flags,
103 flags2);
104 if (fa)
105 xchk_ino_set_corrupt(sc, ino);
106}
107
108/* Make sure the di_flags make sense for the inode. */
109STATIC void
110xchk_inode_flags(
111 struct xfs_scrub *sc,
112 struct xfs_dinode *dip,
113 xfs_ino_t ino,
114 uint16_t mode,
115 uint16_t flags)
116{
117 struct xfs_mount *mp = sc->mp;
118
119 /* di_flags are all taken, last bit cannot be used */
120 if (flags & ~XFS_DIFLAG_ANY)
121 goto bad;
122
123 /* rt flags require rt device */
124 if ((flags & (XFS_DIFLAG_REALTIME | XFS_DIFLAG_RTINHERIT)) &&
125 !mp->m_rtdev_targp)
126 goto bad;
127
128 /* new rt bitmap flag only valid for rbmino */
129 if ((flags & XFS_DIFLAG_NEWRTBM) && ino != mp->m_sb.sb_rbmino)
130 goto bad;
131
132 /* directory-only flags */
133 if ((flags & (XFS_DIFLAG_RTINHERIT |
134 XFS_DIFLAG_EXTSZINHERIT |
135 XFS_DIFLAG_PROJINHERIT |
136 XFS_DIFLAG_NOSYMLINKS)) &&
137 !S_ISDIR(mode))
138 goto bad;
139
140 /* file-only flags */
141 if ((flags & (XFS_DIFLAG_REALTIME | FS_XFLAG_EXTSIZE)) &&
142 !S_ISREG(mode))
143 goto bad;
144
145 /* filestreams and rt make no sense */
146 if ((flags & XFS_DIFLAG_FILESTREAM) && (flags & XFS_DIFLAG_REALTIME))
147 goto bad;
148
149 return;
150bad:
151 xchk_ino_set_corrupt(sc, ino);
152}
153
154/* Make sure the di_flags2 make sense for the inode. */
155STATIC void
156xchk_inode_flags2(
157 struct xfs_scrub *sc,
158 struct xfs_dinode *dip,
159 xfs_ino_t ino,
160 uint16_t mode,
161 uint16_t flags,
162 uint64_t flags2)
163{
164 struct xfs_mount *mp = sc->mp;
165
166 /* Unknown di_flags2 could be from a future kernel */
167 if (flags2 & ~XFS_DIFLAG2_ANY)
168 xchk_ino_set_warning(sc, ino);
169
170 /* reflink flag requires reflink feature */
171 if ((flags2 & XFS_DIFLAG2_REFLINK) &&
172 !xfs_sb_version_hasreflink(&mp->m_sb))
173 goto bad;
174
175 /* cowextsize flag is checked w.r.t. mode separately */
176
177 /* file/dir-only flags */
178 if ((flags2 & XFS_DIFLAG2_DAX) && !(S_ISREG(mode) || S_ISDIR(mode)))
179 goto bad;
180
181 /* file-only flags */
182 if ((flags2 & XFS_DIFLAG2_REFLINK) && !S_ISREG(mode))
183 goto bad;
184
185 /* realtime and reflink make no sense, currently */
186 if ((flags & XFS_DIFLAG_REALTIME) && (flags2 & XFS_DIFLAG2_REFLINK))
187 goto bad;
188
189 /* dax and reflink make no sense, currently */
190 if ((flags2 & XFS_DIFLAG2_DAX) && (flags2 & XFS_DIFLAG2_REFLINK))
191 goto bad;
192
193 return;
194bad:
195 xchk_ino_set_corrupt(sc, ino);
196}
197
198/* Scrub all the ondisk inode fields. */
199STATIC void
200xchk_dinode(
201 struct xfs_scrub *sc,
202 struct xfs_dinode *dip,
203 xfs_ino_t ino)
204{
205 struct xfs_mount *mp = sc->mp;
206 size_t fork_recs;
207 unsigned long long isize;
208 uint64_t flags2;
209 uint32_t nextents;
210 uint16_t flags;
211 uint16_t mode;
212
213 flags = be16_to_cpu(dip->di_flags);
214 if (dip->di_version >= 3)
215 flags2 = be64_to_cpu(dip->di_flags2);
216 else
217 flags2 = 0;
218
219 /* di_mode */
220 mode = be16_to_cpu(dip->di_mode);
221 switch (mode & S_IFMT) {
222 case S_IFLNK:
223 case S_IFREG:
224 case S_IFDIR:
225 case S_IFCHR:
226 case S_IFBLK:
227 case S_IFIFO:
228 case S_IFSOCK:
229 /* mode is recognized */
230 break;
231 default:
232 xchk_ino_set_corrupt(sc, ino);
233 break;
234 }
235
236 /* v1/v2 fields */
237 switch (dip->di_version) {
238 case 1:
239 /*
240 * We autoconvert v1 inodes into v2 inodes on writeout,
241 * so just mark this inode for preening.
242 */
243 xchk_ino_set_preen(sc, ino);
244 break;
245 case 2:
246 case 3:
247 if (dip->di_onlink != 0)
248 xchk_ino_set_corrupt(sc, ino);
249
250 if (dip->di_mode == 0 && sc->ip)
251 xchk_ino_set_corrupt(sc, ino);
252
253 if (dip->di_projid_hi != 0 &&
254 !xfs_sb_version_hasprojid32bit(&mp->m_sb))
255 xchk_ino_set_corrupt(sc, ino);
256 break;
257 default:
258 xchk_ino_set_corrupt(sc, ino);
259 return;
260 }
261
262 /*
263 * di_uid/di_gid -- -1 isn't invalid, but there's no way that
264 * userspace could have created that.
265 */
266 if (dip->di_uid == cpu_to_be32(-1U) ||
267 dip->di_gid == cpu_to_be32(-1U))
268 xchk_ino_set_warning(sc, ino);
269
270 /* di_format */
271 switch (dip->di_format) {
272 case XFS_DINODE_FMT_DEV:
273 if (!S_ISCHR(mode) && !S_ISBLK(mode) &&
274 !S_ISFIFO(mode) && !S_ISSOCK(mode))
275 xchk_ino_set_corrupt(sc, ino);
276 break;
277 case XFS_DINODE_FMT_LOCAL:
278 if (!S_ISDIR(mode) && !S_ISLNK(mode))
279 xchk_ino_set_corrupt(sc, ino);
280 break;
281 case XFS_DINODE_FMT_EXTENTS:
282 if (!S_ISREG(mode) && !S_ISDIR(mode) && !S_ISLNK(mode))
283 xchk_ino_set_corrupt(sc, ino);
284 break;
285 case XFS_DINODE_FMT_BTREE:
286 if (!S_ISREG(mode) && !S_ISDIR(mode))
287 xchk_ino_set_corrupt(sc, ino);
288 break;
289 case XFS_DINODE_FMT_UUID:
290 default:
291 xchk_ino_set_corrupt(sc, ino);
292 break;
293 }
294
295 /* di_[amc]time.nsec */
296 if (be32_to_cpu(dip->di_atime.t_nsec) >= NSEC_PER_SEC)
297 xchk_ino_set_corrupt(sc, ino);
298 if (be32_to_cpu(dip->di_mtime.t_nsec) >= NSEC_PER_SEC)
299 xchk_ino_set_corrupt(sc, ino);
300 if (be32_to_cpu(dip->di_ctime.t_nsec) >= NSEC_PER_SEC)
301 xchk_ino_set_corrupt(sc, ino);
302
303 /*
304 * di_size. xfs_dinode_verify checks for things that screw up
305 * the VFS such as the upper bit being set and zero-length
306 * symlinks/directories, but we can do more here.
307 */
308 isize = be64_to_cpu(dip->di_size);
309 if (isize & (1ULL << 63))
310 xchk_ino_set_corrupt(sc, ino);
311
312 /* Devices, fifos, and sockets must have zero size */
313 if (!S_ISDIR(mode) && !S_ISREG(mode) && !S_ISLNK(mode) && isize != 0)
314 xchk_ino_set_corrupt(sc, ino);
315
316 /* Directories can't be larger than the data section size (32G) */
317 if (S_ISDIR(mode) && (isize == 0 || isize >= XFS_DIR2_SPACE_SIZE))
318 xchk_ino_set_corrupt(sc, ino);
319
320 /* Symlinks can't be larger than SYMLINK_MAXLEN */
321 if (S_ISLNK(mode) && (isize == 0 || isize >= XFS_SYMLINK_MAXLEN))
322 xchk_ino_set_corrupt(sc, ino);
323
324 /*
325 * Warn if the running kernel can't handle the kinds of offsets
326 * needed to deal with the file size. In other words, if the
327 * pagecache can't cache all the blocks in this file due to
328 * overly large offsets, flag the inode for admin review.
329 */
330 if (isize >= mp->m_super->s_maxbytes)
331 xchk_ino_set_warning(sc, ino);
332
333 /* di_nblocks */
334 if (flags2 & XFS_DIFLAG2_REFLINK) {
335 ; /* nblocks can exceed dblocks */
336 } else if (flags & XFS_DIFLAG_REALTIME) {
337 /*
338 * nblocks is the sum of data extents (in the rtdev),
339 * attr extents (in the datadev), and both forks' bmbt
340 * blocks (in the datadev). This clumsy check is the
341 * best we can do without cross-referencing with the
342 * inode forks.
343 */
344 if (be64_to_cpu(dip->di_nblocks) >=
345 mp->m_sb.sb_dblocks + mp->m_sb.sb_rblocks)
346 xchk_ino_set_corrupt(sc, ino);
347 } else {
348 if (be64_to_cpu(dip->di_nblocks) >= mp->m_sb.sb_dblocks)
349 xchk_ino_set_corrupt(sc, ino);
350 }
351
352 xchk_inode_flags(sc, dip, ino, mode, flags);
353
354 xchk_inode_extsize(sc, dip, ino, mode, flags);
355
356 /* di_nextents */
357 nextents = be32_to_cpu(dip->di_nextents);
358 fork_recs = XFS_DFORK_DSIZE(dip, mp) / sizeof(struct xfs_bmbt_rec);
359 switch (dip->di_format) {
360 case XFS_DINODE_FMT_EXTENTS:
361 if (nextents > fork_recs)
362 xchk_ino_set_corrupt(sc, ino);
363 break;
364 case XFS_DINODE_FMT_BTREE:
365 if (nextents <= fork_recs)
366 xchk_ino_set_corrupt(sc, ino);
367 break;
368 default:
369 if (nextents != 0)
370 xchk_ino_set_corrupt(sc, ino);
371 break;
372 }
373
374 /* di_forkoff */
375 if (XFS_DFORK_APTR(dip) >= (char *)dip + mp->m_sb.sb_inodesize)
376 xchk_ino_set_corrupt(sc, ino);
377 if (dip->di_anextents != 0 && dip->di_forkoff == 0)
378 xchk_ino_set_corrupt(sc, ino);
379 if (dip->di_forkoff == 0 && dip->di_aformat != XFS_DINODE_FMT_EXTENTS)
380 xchk_ino_set_corrupt(sc, ino);
381
382 /* di_aformat */
383 if (dip->di_aformat != XFS_DINODE_FMT_LOCAL &&
384 dip->di_aformat != XFS_DINODE_FMT_EXTENTS &&
385 dip->di_aformat != XFS_DINODE_FMT_BTREE)
386 xchk_ino_set_corrupt(sc, ino);
387
388 /* di_anextents */
389 nextents = be16_to_cpu(dip->di_anextents);
390 fork_recs = XFS_DFORK_ASIZE(dip, mp) / sizeof(struct xfs_bmbt_rec);
391 switch (dip->di_aformat) {
392 case XFS_DINODE_FMT_EXTENTS:
393 if (nextents > fork_recs)
394 xchk_ino_set_corrupt(sc, ino);
395 break;
396 case XFS_DINODE_FMT_BTREE:
397 if (nextents <= fork_recs)
398 xchk_ino_set_corrupt(sc, ino);
399 break;
400 default:
401 if (nextents != 0)
402 xchk_ino_set_corrupt(sc, ino);
403 }
404
405 if (dip->di_version >= 3) {
406 if (be32_to_cpu(dip->di_crtime.t_nsec) >= NSEC_PER_SEC)
407 xchk_ino_set_corrupt(sc, ino);
408 xchk_inode_flags2(sc, dip, ino, mode, flags, flags2);
409 xchk_inode_cowextsize(sc, dip, ino, mode, flags,
410 flags2);
411 }
412}
413
414/*
415 * Make sure the finobt doesn't think this inode is free.
416 * We don't have to check the inobt ourselves because we got the inode via
417 * IGET_UNTRUSTED, which checks the inobt for us.
418 */
419static void
420xchk_inode_xref_finobt(
421 struct xfs_scrub *sc,
422 xfs_ino_t ino)
423{
424 struct xfs_inobt_rec_incore rec;
425 xfs_agino_t agino;
426 int has_record;
427 int error;
428
429 if (!sc->sa.fino_cur || xchk_skip_xref(sc->sm))
430 return;
431
432 agino = XFS_INO_TO_AGINO(sc->mp, ino);
433
434 /*
435 * Try to get the finobt record. If we can't get it, then we're
436 * in good shape.
437 */
438 error = xfs_inobt_lookup(sc->sa.fino_cur, agino, XFS_LOOKUP_LE,
439 &has_record);
440 if (!xchk_should_check_xref(sc, &error, &sc->sa.fino_cur) ||
441 !has_record)
442 return;
443
444 error = xfs_inobt_get_rec(sc->sa.fino_cur, &rec, &has_record);
445 if (!xchk_should_check_xref(sc, &error, &sc->sa.fino_cur) ||
446 !has_record)
447 return;
448
449 /*
450 * Otherwise, make sure this record either doesn't cover this inode,
451 * or that it does but it's marked present.
452 */
453 if (rec.ir_startino > agino ||
454 rec.ir_startino + XFS_INODES_PER_CHUNK <= agino)
455 return;
456
457 if (rec.ir_free & XFS_INOBT_MASK(agino - rec.ir_startino))
458 xchk_btree_xref_set_corrupt(sc, sc->sa.fino_cur, 0);
459}
460
461/* Cross reference the inode fields with the forks. */
462STATIC void
463xchk_inode_xref_bmap(
464 struct xfs_scrub *sc,
465 struct xfs_dinode *dip)
466{
467 xfs_extnum_t nextents;
468 xfs_filblks_t count;
469 xfs_filblks_t acount;
470 int error;
471
472 if (xchk_skip_xref(sc->sm))
473 return;
474
475 /* Walk all the extents to check nextents/naextents/nblocks. */
476 error = xfs_bmap_count_blocks(sc->tp, sc->ip, XFS_DATA_FORK,
477 &nextents, &count);
478 if (!xchk_should_check_xref(sc, &error, NULL))
479 return;
480 if (nextents < be32_to_cpu(dip->di_nextents))
481 xchk_ino_xref_set_corrupt(sc, sc->ip->i_ino);
482
483 error = xfs_bmap_count_blocks(sc->tp, sc->ip, XFS_ATTR_FORK,
484 &nextents, &acount);
485 if (!xchk_should_check_xref(sc, &error, NULL))
486 return;
487 if (nextents != be16_to_cpu(dip->di_anextents))
488 xchk_ino_xref_set_corrupt(sc, sc->ip->i_ino);
489
490 /* Check nblocks against the inode. */
491 if (count + acount != be64_to_cpu(dip->di_nblocks))
492 xchk_ino_xref_set_corrupt(sc, sc->ip->i_ino);
493}
494
495/* Cross-reference with the other btrees. */
496STATIC void
497xchk_inode_xref(
498 struct xfs_scrub *sc,
499 xfs_ino_t ino,
500 struct xfs_dinode *dip)
501{
502 xfs_agnumber_t agno;
503 xfs_agblock_t agbno;
504 int error;
505
506 if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
507 return;
508
509 agno = XFS_INO_TO_AGNO(sc->mp, ino);
510 agbno = XFS_INO_TO_AGBNO(sc->mp, ino);
511
512 error = xchk_ag_init(sc, agno, &sc->sa);
513 if (!xchk_xref_process_error(sc, agno, agbno, &error))
514 return;
515
516 xchk_xref_is_used_space(sc, agbno, 1);
517 xchk_inode_xref_finobt(sc, ino);
518 xchk_xref_is_owned_by(sc, agbno, 1, &XFS_RMAP_OINFO_INODES);
519 xchk_xref_is_not_shared(sc, agbno, 1);
520 xchk_inode_xref_bmap(sc, dip);
521
522 xchk_ag_free(sc, &sc->sa);
523}
524
525/*
526 * If the reflink iflag disagrees with a scan for shared data fork extents,
527 * either flag an error (shared extents w/ no flag) or a preen (flag set w/o
528 * any shared extents). We already checked for reflink iflag set on a non
529 * reflink filesystem.
530 */
531static void
532xchk_inode_check_reflink_iflag(
533 struct xfs_scrub *sc,
534 xfs_ino_t ino)
535{
536 struct xfs_mount *mp = sc->mp;
537 bool has_shared;
538 int error;
539
540 if (!xfs_sb_version_hasreflink(&mp->m_sb))
541 return;
542
543 error = xfs_reflink_inode_has_shared_extents(sc->tp, sc->ip,
544 &has_shared);
545 if (!xchk_xref_process_error(sc, XFS_INO_TO_AGNO(mp, ino),
546 XFS_INO_TO_AGBNO(mp, ino), &error))
547 return;
548 if (xfs_is_reflink_inode(sc->ip) && !has_shared)
549 xchk_ino_set_preen(sc, ino);
550 else if (!xfs_is_reflink_inode(sc->ip) && has_shared)
551 xchk_ino_set_corrupt(sc, ino);
552}
553
554/* Scrub an inode. */
555int
556xchk_inode(
557 struct xfs_scrub *sc)
558{
559 struct xfs_dinode di;
560 int error = 0;
561
562 /*
563 * If sc->ip is NULL, that means that the setup function called
564 * xfs_iget to look up the inode. xfs_iget returned a EFSCORRUPTED
565 * and a NULL inode, so flag the corruption error and return.
566 */
567 if (!sc->ip) {
568 xchk_ino_set_corrupt(sc, sc->sm->sm_ino);
569 return 0;
570 }
571
572 /* Scrub the inode core. */
573 xfs_inode_to_disk(sc->ip, &di, 0);
574 xchk_dinode(sc, &di, sc->ip->i_ino);
575 if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
576 goto out;
577
578 /*
579 * Look for discrepancies between file's data blocks and the reflink
580 * iflag. We already checked the iflag against the file mode when
581 * we scrubbed the dinode.
582 */
583 if (S_ISREG(VFS_I(sc->ip)->i_mode))
584 xchk_inode_check_reflink_iflag(sc, sc->ip->i_ino);
585
586 xchk_inode_xref(sc, sc->ip->i_ino, &di);
587out:
588 return error;
589}