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fd7d73c0 DW |
1 | /* |
2 | * Copyright (C) 2018 Oracle. All Rights Reserved. | |
3 | * | |
4 | * Author: Darrick J. Wong <darrick.wong@oracle.com> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU General Public License | |
8 | * as published by the Free Software Foundation; either version 2 | |
9 | * of the License, or (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it would be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write the Free Software Foundation, | |
18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA. | |
19 | */ | |
20 | #include <stdio.h> | |
21 | #include <stdbool.h> | |
22 | #include <stdint.h> | |
23 | #include <stdlib.h> | |
24 | #include <unistd.h> | |
25 | #include <string.h> | |
26 | #include <sys/types.h> | |
27 | #include <sys/stat.h> | |
28 | #include <sys/statvfs.h> | |
29 | #include "xfs.h" | |
30 | #include "xfs_fs.h" | |
19852474 | 31 | #include "list.h" |
fd7d73c0 DW |
32 | #include "path.h" |
33 | #include "xfs_scrub.h" | |
34 | #include "common.h" | |
ed60d210 | 35 | #include "progress.h" |
fd7d73c0 DW |
36 | #include "scrub.h" |
37 | #include "xfs_errortag.h" | |
38 | ||
39 | /* Online scrub and repair wrappers. */ | |
40 | ||
41 | /* Type info and names for the scrub types. */ | |
42 | enum scrub_type { | |
43 | ST_NONE, /* disabled */ | |
44 | ST_AGHEADER, /* per-AG header */ | |
45 | ST_PERAG, /* per-AG metadata */ | |
46 | ST_FS, /* per-FS metadata */ | |
47 | ST_INODE, /* per-inode metadata */ | |
48 | }; | |
49 | struct scrub_descr { | |
50 | const char *name; | |
51 | enum scrub_type type; | |
52 | }; | |
53 | ||
54 | /* These must correspond to XFS_SCRUB_TYPE_ */ | |
55 | static const struct scrub_descr scrubbers[XFS_SCRUB_TYPE_NR] = { | |
56 | [XFS_SCRUB_TYPE_PROBE] = | |
57 | {"metadata", ST_NONE}, | |
58 | [XFS_SCRUB_TYPE_SB] = | |
59 | {"superblock", ST_AGHEADER}, | |
60 | [XFS_SCRUB_TYPE_AGF] = | |
61 | {"free space header", ST_AGHEADER}, | |
62 | [XFS_SCRUB_TYPE_AGFL] = | |
63 | {"free list", ST_AGHEADER}, | |
64 | [XFS_SCRUB_TYPE_AGI] = | |
65 | {"inode header", ST_AGHEADER}, | |
66 | [XFS_SCRUB_TYPE_BNOBT] = | |
67 | {"freesp by block btree", ST_PERAG}, | |
68 | [XFS_SCRUB_TYPE_CNTBT] = | |
69 | {"freesp by length btree", ST_PERAG}, | |
70 | [XFS_SCRUB_TYPE_INOBT] = | |
71 | {"inode btree", ST_PERAG}, | |
72 | [XFS_SCRUB_TYPE_FINOBT] = | |
73 | {"free inode btree", ST_PERAG}, | |
74 | [XFS_SCRUB_TYPE_RMAPBT] = | |
75 | {"reverse mapping btree", ST_PERAG}, | |
76 | [XFS_SCRUB_TYPE_REFCNTBT] = | |
77 | {"reference count btree", ST_PERAG}, | |
78 | [XFS_SCRUB_TYPE_INODE] = | |
79 | {"inode record", ST_INODE}, | |
80 | [XFS_SCRUB_TYPE_BMBTD] = | |
81 | {"data block map", ST_INODE}, | |
82 | [XFS_SCRUB_TYPE_BMBTA] = | |
83 | {"attr block map", ST_INODE}, | |
84 | [XFS_SCRUB_TYPE_BMBTC] = | |
85 | {"CoW block map", ST_INODE}, | |
86 | [XFS_SCRUB_TYPE_DIR] = | |
87 | {"directory entries", ST_INODE}, | |
88 | [XFS_SCRUB_TYPE_XATTR] = | |
89 | {"extended attributes", ST_INODE}, | |
90 | [XFS_SCRUB_TYPE_SYMLINK] = | |
91 | {"symbolic link", ST_INODE}, | |
92 | [XFS_SCRUB_TYPE_PARENT] = | |
93 | {"parent pointer", ST_INODE}, | |
94 | [XFS_SCRUB_TYPE_RTBITMAP] = | |
95 | {"realtime bitmap", ST_FS}, | |
96 | [XFS_SCRUB_TYPE_RTSUM] = | |
97 | {"realtime summary", ST_FS}, | |
98 | [XFS_SCRUB_TYPE_UQUOTA] = | |
99 | {"user quotas", ST_FS}, | |
100 | [XFS_SCRUB_TYPE_GQUOTA] = | |
101 | {"group quotas", ST_FS}, | |
102 | [XFS_SCRUB_TYPE_PQUOTA] = | |
103 | {"project quotas", ST_FS}, | |
104 | }; | |
105 | ||
106 | /* Format a scrub description. */ | |
107 | static void | |
108 | format_scrub_descr( | |
109 | char *buf, | |
110 | size_t buflen, | |
111 | struct xfs_scrub_metadata *meta, | |
112 | const struct scrub_descr *sc) | |
113 | { | |
114 | switch (sc->type) { | |
115 | case ST_AGHEADER: | |
116 | case ST_PERAG: | |
117 | snprintf(buf, buflen, _("AG %u %s"), meta->sm_agno, | |
118 | _(sc->name)); | |
119 | break; | |
120 | case ST_INODE: | |
121 | snprintf(buf, buflen, _("Inode %"PRIu64" %s"), | |
122 | (uint64_t)meta->sm_ino, _(sc->name)); | |
123 | break; | |
124 | case ST_FS: | |
125 | snprintf(buf, buflen, _("%s"), _(sc->name)); | |
126 | break; | |
127 | case ST_NONE: | |
128 | assert(0); | |
129 | break; | |
130 | } | |
131 | } | |
132 | ||
133 | /* Predicates for scrub flag state. */ | |
134 | ||
135 | static inline bool is_corrupt(struct xfs_scrub_metadata *sm) | |
136 | { | |
137 | return sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT; | |
138 | } | |
139 | ||
140 | static inline bool is_unoptimized(struct xfs_scrub_metadata *sm) | |
141 | { | |
142 | return sm->sm_flags & XFS_SCRUB_OFLAG_PREEN; | |
143 | } | |
144 | ||
145 | static inline bool xref_failed(struct xfs_scrub_metadata *sm) | |
146 | { | |
147 | return sm->sm_flags & XFS_SCRUB_OFLAG_XFAIL; | |
148 | } | |
149 | ||
150 | static inline bool xref_disagrees(struct xfs_scrub_metadata *sm) | |
151 | { | |
152 | return sm->sm_flags & XFS_SCRUB_OFLAG_XCORRUPT; | |
153 | } | |
154 | ||
155 | static inline bool is_incomplete(struct xfs_scrub_metadata *sm) | |
156 | { | |
157 | return sm->sm_flags & XFS_SCRUB_OFLAG_INCOMPLETE; | |
158 | } | |
159 | ||
160 | static inline bool is_suspicious(struct xfs_scrub_metadata *sm) | |
161 | { | |
162 | return sm->sm_flags & XFS_SCRUB_OFLAG_WARNING; | |
163 | } | |
164 | ||
165 | /* Should we fix it? */ | |
166 | static inline bool needs_repair(struct xfs_scrub_metadata *sm) | |
167 | { | |
168 | return is_corrupt(sm) || xref_disagrees(sm); | |
169 | } | |
170 | ||
171 | /* Warn about strange circumstances after scrub. */ | |
172 | static inline void | |
173 | xfs_scrub_warn_incomplete_scrub( | |
174 | struct scrub_ctx *ctx, | |
175 | const char *descr, | |
176 | struct xfs_scrub_metadata *meta) | |
177 | { | |
178 | if (is_incomplete(meta)) | |
179 | str_info(ctx, descr, _("Check incomplete.")); | |
180 | ||
181 | if (is_suspicious(meta)) { | |
182 | if (debug) | |
183 | str_info(ctx, descr, _("Possibly suspect metadata.")); | |
184 | else | |
185 | str_warn(ctx, descr, _("Possibly suspect metadata.")); | |
186 | } | |
187 | ||
188 | if (xref_failed(meta)) | |
189 | str_info(ctx, descr, _("Cross-referencing failed.")); | |
190 | } | |
191 | ||
192 | /* Do a read-only check of some metadata. */ | |
193 | static enum check_outcome | |
194 | xfs_check_metadata( | |
195 | struct scrub_ctx *ctx, | |
196 | int fd, | |
197 | struct xfs_scrub_metadata *meta, | |
198 | bool is_inode) | |
199 | { | |
200 | char buf[DESCR_BUFSZ]; | |
201 | unsigned int tries = 0; | |
202 | int code; | |
203 | int error; | |
204 | ||
205 | assert(!debug_tweak_on("XFS_SCRUB_NO_KERNEL")); | |
206 | assert(meta->sm_type < XFS_SCRUB_TYPE_NR); | |
207 | format_scrub_descr(buf, DESCR_BUFSZ, meta, &scrubbers[meta->sm_type]); | |
208 | ||
209 | dbg_printf("check %s flags %xh\n", buf, meta->sm_flags); | |
210 | retry: | |
211 | error = ioctl(fd, XFS_IOC_SCRUB_METADATA, meta); | |
212 | if (debug_tweak_on("XFS_SCRUB_FORCE_REPAIR") && !error) | |
213 | meta->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT; | |
214 | if (error) { | |
215 | code = errno; | |
216 | switch (code) { | |
217 | case ENOENT: | |
218 | /* Metadata not present, just skip it. */ | |
219 | return CHECK_DONE; | |
220 | case ESHUTDOWN: | |
221 | /* FS already crashed, give up. */ | |
82377bde | 222 | str_info(ctx, buf, |
fd7d73c0 DW |
223 | _("Filesystem is shut down, aborting.")); |
224 | return CHECK_ABORT; | |
225 | case EIO: | |
226 | case ENOMEM: | |
227 | /* Abort on I/O errors or insufficient memory. */ | |
228 | str_errno(ctx, buf); | |
229 | return CHECK_ABORT; | |
230 | case EDEADLOCK: | |
231 | case EBUSY: | |
232 | case EFSBADCRC: | |
233 | case EFSCORRUPTED: | |
234 | /* | |
235 | * The first two should never escape the kernel, | |
236 | * and the other two should be reported via sm_flags. | |
237 | */ | |
82377bde | 238 | str_info(ctx, buf, |
fd7d73c0 DW |
239 | _("Kernel bug! errno=%d"), code); |
240 | /* fall through */ | |
241 | default: | |
242 | /* Operational error. */ | |
243 | str_errno(ctx, buf); | |
244 | return CHECK_DONE; | |
245 | } | |
246 | } | |
247 | ||
248 | /* | |
249 | * If the kernel says the test was incomplete or that there was | |
250 | * a cross-referencing discrepancy but no obvious corruption, | |
251 | * we'll try the scan again, just in case the fs was busy. | |
252 | * Only retry so many times. | |
253 | */ | |
254 | if (tries < 10 && (is_incomplete(meta) || | |
255 | (xref_disagrees(meta) && !is_corrupt(meta)))) { | |
256 | tries++; | |
257 | goto retry; | |
258 | } | |
259 | ||
260 | /* Complain about incomplete or suspicious metadata. */ | |
261 | xfs_scrub_warn_incomplete_scrub(ctx, buf, meta); | |
262 | ||
263 | /* | |
264 | * If we need repairs or there were discrepancies, schedule a | |
265 | * repair if desired, otherwise complain. | |
266 | */ | |
267 | if (is_corrupt(meta) || xref_disagrees(meta)) { | |
268 | if (ctx->mode < SCRUB_MODE_REPAIR) { | |
269 | str_error(ctx, buf, | |
270 | _("Repairs are required.")); | |
271 | return CHECK_DONE; | |
272 | } | |
273 | ||
274 | return CHECK_REPAIR; | |
275 | } | |
276 | ||
277 | /* | |
278 | * If we could optimize, schedule a repair if desired, | |
279 | * otherwise complain. | |
280 | */ | |
281 | if (is_unoptimized(meta)) { | |
1658224d | 282 | if (ctx->mode != SCRUB_MODE_REPAIR) { |
fd7d73c0 DW |
283 | if (!is_inode) { |
284 | /* AG or FS metadata, always warn. */ | |
285 | str_info(ctx, buf, | |
286 | _("Optimization is possible.")); | |
287 | } else if (!ctx->preen_triggers[meta->sm_type]) { | |
288 | /* File metadata, only warn once per type. */ | |
289 | pthread_mutex_lock(&ctx->lock); | |
290 | if (!ctx->preen_triggers[meta->sm_type]) | |
291 | ctx->preen_triggers[meta->sm_type] = true; | |
292 | pthread_mutex_unlock(&ctx->lock); | |
293 | } | |
294 | return CHECK_DONE; | |
295 | } | |
296 | ||
297 | return CHECK_REPAIR; | |
298 | } | |
299 | ||
300 | /* Everything is ok. */ | |
301 | return CHECK_DONE; | |
302 | } | |
303 | ||
304 | /* Bulk-notify user about things that could be optimized. */ | |
305 | void | |
306 | xfs_scrub_report_preen_triggers( | |
307 | struct scrub_ctx *ctx) | |
308 | { | |
309 | int i; | |
310 | ||
311 | for (i = 0; i < XFS_SCRUB_TYPE_NR; i++) { | |
312 | pthread_mutex_lock(&ctx->lock); | |
313 | if (ctx->preen_triggers[i]) { | |
314 | ctx->preen_triggers[i] = false; | |
315 | pthread_mutex_unlock(&ctx->lock); | |
316 | str_info(ctx, ctx->mntpoint, | |
317 | _("Optimizations of %s are possible."), scrubbers[i].name); | |
318 | } else { | |
319 | pthread_mutex_unlock(&ctx->lock); | |
320 | } | |
321 | } | |
322 | } | |
323 | ||
324 | /* Scrub metadata, saving corruption reports for later. */ | |
325 | static bool | |
326 | xfs_scrub_metadata( | |
327 | struct scrub_ctx *ctx, | |
328 | enum scrub_type scrub_type, | |
329 | xfs_agnumber_t agno) | |
330 | { | |
331 | struct xfs_scrub_metadata meta = {0}; | |
332 | const struct scrub_descr *sc; | |
333 | enum check_outcome fix; | |
334 | int type; | |
335 | ||
336 | sc = scrubbers; | |
337 | for (type = 0; type < XFS_SCRUB_TYPE_NR; type++, sc++) { | |
338 | if (sc->type != scrub_type) | |
339 | continue; | |
340 | ||
341 | meta.sm_type = type; | |
342 | meta.sm_flags = 0; | |
343 | meta.sm_agno = agno; | |
344 | background_sleep(); | |
345 | ||
346 | /* Check the item. */ | |
347 | fix = xfs_check_metadata(ctx, ctx->mnt_fd, &meta, false); | |
ed60d210 | 348 | progress_add(1); |
fd7d73c0 DW |
349 | switch (fix) { |
350 | case CHECK_ABORT: | |
351 | return false; | |
352 | case CHECK_REPAIR: | |
353 | /* fall through */ | |
354 | case CHECK_DONE: | |
355 | continue; | |
356 | case CHECK_RETRY: | |
357 | abort(); | |
358 | break; | |
359 | } | |
360 | } | |
361 | ||
362 | return true; | |
363 | } | |
364 | ||
365 | /* | |
366 | * Scrub primary superblock. This will be useful if we ever need to hook | |
367 | * a filesystem-wide pre-scrub activity off of the sb 0 scrubber (which | |
368 | * currently does nothing). | |
369 | */ | |
370 | bool | |
371 | xfs_scrub_primary_super( | |
372 | struct scrub_ctx *ctx) | |
373 | { | |
374 | struct xfs_scrub_metadata meta = { | |
375 | .sm_type = XFS_SCRUB_TYPE_SB, | |
376 | }; | |
377 | enum check_outcome fix; | |
378 | ||
379 | /* Check the item. */ | |
380 | fix = xfs_check_metadata(ctx, ctx->mnt_fd, &meta, false); | |
381 | switch (fix) { | |
382 | case CHECK_ABORT: | |
383 | return false; | |
384 | case CHECK_REPAIR: | |
385 | /* fall through */ | |
386 | case CHECK_DONE: | |
387 | return true; | |
388 | case CHECK_RETRY: | |
389 | abort(); | |
390 | break; | |
391 | } | |
392 | ||
393 | return true; | |
394 | } | |
395 | ||
396 | /* Scrub each AG's header blocks. */ | |
397 | bool | |
398 | xfs_scrub_ag_headers( | |
399 | struct scrub_ctx *ctx, | |
400 | xfs_agnumber_t agno) | |
401 | { | |
402 | return xfs_scrub_metadata(ctx, ST_AGHEADER, agno); | |
403 | } | |
404 | ||
405 | /* Scrub each AG's metadata btrees. */ | |
406 | bool | |
407 | xfs_scrub_ag_metadata( | |
408 | struct scrub_ctx *ctx, | |
409 | xfs_agnumber_t agno) | |
410 | { | |
411 | return xfs_scrub_metadata(ctx, ST_PERAG, agno); | |
412 | } | |
413 | ||
414 | /* Scrub whole-FS metadata btrees. */ | |
415 | bool | |
416 | xfs_scrub_fs_metadata( | |
417 | struct scrub_ctx *ctx) | |
418 | { | |
419 | return xfs_scrub_metadata(ctx, ST_FS, 0); | |
420 | } | |
421 | ||
ed60d210 DW |
422 | /* How many items do we have to check? */ |
423 | unsigned int | |
424 | xfs_scrub_estimate_ag_work( | |
425 | struct scrub_ctx *ctx) | |
426 | { | |
427 | const struct scrub_descr *sc; | |
428 | int type; | |
429 | unsigned int estimate = 0; | |
430 | ||
431 | sc = scrubbers; | |
432 | for (type = 0; type < XFS_SCRUB_TYPE_NR; type++, sc++) { | |
433 | switch (sc->type) { | |
434 | case ST_AGHEADER: | |
435 | case ST_PERAG: | |
436 | estimate += ctx->geo.agcount; | |
437 | break; | |
438 | case ST_FS: | |
439 | estimate++; | |
440 | break; | |
441 | default: | |
442 | break; | |
443 | } | |
444 | } | |
445 | return estimate; | |
446 | } | |
447 | ||
fd7d73c0 DW |
448 | /* Scrub inode metadata. */ |
449 | static bool | |
450 | __xfs_scrub_file( | |
451 | struct scrub_ctx *ctx, | |
452 | uint64_t ino, | |
453 | uint32_t gen, | |
454 | int fd, | |
455 | unsigned int type) | |
456 | { | |
457 | struct xfs_scrub_metadata meta = {0}; | |
458 | enum check_outcome fix; | |
459 | ||
460 | assert(type < XFS_SCRUB_TYPE_NR); | |
461 | assert(scrubbers[type].type == ST_INODE); | |
462 | ||
463 | meta.sm_type = type; | |
464 | meta.sm_ino = ino; | |
465 | meta.sm_gen = gen; | |
466 | ||
467 | /* Scrub the piece of metadata. */ | |
468 | fix = xfs_check_metadata(ctx, fd, &meta, true); | |
469 | if (fix == CHECK_ABORT) | |
470 | return false; | |
471 | if (fix == CHECK_DONE) | |
472 | return true; | |
473 | ||
474 | return true; | |
475 | } | |
476 | ||
477 | bool | |
478 | xfs_scrub_inode_fields( | |
479 | struct scrub_ctx *ctx, | |
480 | uint64_t ino, | |
481 | uint32_t gen, | |
482 | int fd) | |
483 | { | |
484 | return __xfs_scrub_file(ctx, ino, gen, fd, XFS_SCRUB_TYPE_INODE); | |
485 | } | |
486 | ||
487 | bool | |
488 | xfs_scrub_data_fork( | |
489 | struct scrub_ctx *ctx, | |
490 | uint64_t ino, | |
491 | uint32_t gen, | |
492 | int fd) | |
493 | { | |
494 | return __xfs_scrub_file(ctx, ino, gen, fd, XFS_SCRUB_TYPE_BMBTD); | |
495 | } | |
496 | ||
497 | bool | |
498 | xfs_scrub_attr_fork( | |
499 | struct scrub_ctx *ctx, | |
500 | uint64_t ino, | |
501 | uint32_t gen, | |
502 | int fd) | |
503 | { | |
504 | return __xfs_scrub_file(ctx, ino, gen, fd, XFS_SCRUB_TYPE_BMBTA); | |
505 | } | |
506 | ||
507 | bool | |
508 | xfs_scrub_cow_fork( | |
509 | struct scrub_ctx *ctx, | |
510 | uint64_t ino, | |
511 | uint32_t gen, | |
512 | int fd) | |
513 | { | |
514 | return __xfs_scrub_file(ctx, ino, gen, fd, XFS_SCRUB_TYPE_BMBTC); | |
515 | } | |
516 | ||
517 | bool | |
518 | xfs_scrub_dir( | |
519 | struct scrub_ctx *ctx, | |
520 | uint64_t ino, | |
521 | uint32_t gen, | |
522 | int fd) | |
523 | { | |
524 | return __xfs_scrub_file(ctx, ino, gen, fd, XFS_SCRUB_TYPE_DIR); | |
525 | } | |
526 | ||
527 | bool | |
528 | xfs_scrub_attr( | |
529 | struct scrub_ctx *ctx, | |
530 | uint64_t ino, | |
531 | uint32_t gen, | |
532 | int fd) | |
533 | { | |
534 | return __xfs_scrub_file(ctx, ino, gen, fd, XFS_SCRUB_TYPE_XATTR); | |
535 | } | |
536 | ||
537 | bool | |
538 | xfs_scrub_symlink( | |
539 | struct scrub_ctx *ctx, | |
540 | uint64_t ino, | |
541 | uint32_t gen, | |
542 | int fd) | |
543 | { | |
544 | return __xfs_scrub_file(ctx, ino, gen, fd, XFS_SCRUB_TYPE_SYMLINK); | |
545 | } | |
546 | ||
547 | bool | |
548 | xfs_scrub_parent( | |
549 | struct scrub_ctx *ctx, | |
550 | uint64_t ino, | |
551 | uint32_t gen, | |
552 | int fd) | |
553 | { | |
554 | return __xfs_scrub_file(ctx, ino, gen, fd, XFS_SCRUB_TYPE_PARENT); | |
555 | } | |
556 | ||
557 | /* Test the availability of a kernel scrub command. */ | |
558 | static bool | |
559 | __xfs_scrub_test( | |
560 | struct scrub_ctx *ctx, | |
561 | unsigned int type, | |
562 | bool repair) | |
563 | { | |
564 | struct xfs_scrub_metadata meta = {0}; | |
19852474 | 565 | static bool injected; |
fd7d73c0 DW |
566 | int error; |
567 | ||
568 | if (debug_tweak_on("XFS_SCRUB_NO_KERNEL")) | |
569 | return false; | |
19852474 | 570 | if (debug_tweak_on("XFS_SCRUB_FORCE_REPAIR") && !injected) { |
82377bde | 571 | str_info(ctx, "XFS_SCRUB_FORCE_REPAIR", "Not supported."); |
19852474 DW |
572 | return false; |
573 | } | |
fd7d73c0 DW |
574 | |
575 | meta.sm_type = type; | |
576 | if (repair) | |
577 | meta.sm_flags |= XFS_SCRUB_IFLAG_REPAIR; | |
578 | error = ioctl(ctx->mnt_fd, XFS_IOC_SCRUB_METADATA, &meta); | |
579 | if (!error) | |
580 | return true; | |
581 | switch (errno) { | |
582 | case EROFS: | |
583 | str_info(ctx, ctx->mntpoint, | |
584 | _("Filesystem is mounted read-only; cannot proceed.")); | |
585 | return false; | |
586 | case ENOTRECOVERABLE: | |
587 | str_info(ctx, ctx->mntpoint, | |
588 | _("Filesystem is mounted norecovery; cannot proceed.")); | |
589 | return false; | |
590 | case EOPNOTSUPP: | |
591 | case ENOTTY: | |
592 | if (debug || verbose) | |
593 | str_info(ctx, ctx->mntpoint, | |
594 | _("Kernel %s %s facility not detected."), | |
595 | _(scrubbers[type].name), | |
596 | repair ? _("repair") : _("scrub")); | |
597 | return false; | |
598 | case ENOENT: | |
599 | /* Scrubber says not present on this fs; that's fine. */ | |
600 | return true; | |
601 | default: | |
602 | str_info(ctx, ctx->mntpoint, "%s", strerror(errno)); | |
603 | return true; | |
604 | } | |
fd7d73c0 DW |
605 | } |
606 | ||
607 | bool | |
608 | xfs_can_scrub_fs_metadata( | |
609 | struct scrub_ctx *ctx) | |
610 | { | |
611 | return __xfs_scrub_test(ctx, XFS_SCRUB_TYPE_PROBE, false); | |
612 | } | |
613 | ||
614 | bool | |
615 | xfs_can_scrub_inode( | |
616 | struct scrub_ctx *ctx) | |
617 | { | |
618 | return __xfs_scrub_test(ctx, XFS_SCRUB_TYPE_INODE, false); | |
619 | } | |
620 | ||
621 | bool | |
622 | xfs_can_scrub_bmap( | |
623 | struct scrub_ctx *ctx) | |
624 | { | |
625 | return __xfs_scrub_test(ctx, XFS_SCRUB_TYPE_BMBTD, false); | |
626 | } | |
627 | ||
628 | bool | |
629 | xfs_can_scrub_dir( | |
630 | struct scrub_ctx *ctx) | |
631 | { | |
632 | return __xfs_scrub_test(ctx, XFS_SCRUB_TYPE_DIR, false); | |
633 | } | |
634 | ||
635 | bool | |
636 | xfs_can_scrub_attr( | |
637 | struct scrub_ctx *ctx) | |
638 | { | |
639 | return __xfs_scrub_test(ctx, XFS_SCRUB_TYPE_XATTR, false); | |
640 | } | |
641 | ||
642 | bool | |
643 | xfs_can_scrub_symlink( | |
644 | struct scrub_ctx *ctx) | |
645 | { | |
646 | return __xfs_scrub_test(ctx, XFS_SCRUB_TYPE_SYMLINK, false); | |
647 | } | |
648 | ||
649 | bool | |
650 | xfs_can_scrub_parent( | |
651 | struct scrub_ctx *ctx) | |
652 | { | |
653 | return __xfs_scrub_test(ctx, XFS_SCRUB_TYPE_PARENT, false); | |
654 | } | |
19852474 DW |
655 | |
656 | bool | |
657 | xfs_can_repair( | |
658 | struct scrub_ctx *ctx) | |
659 | { | |
660 | return __xfs_scrub_test(ctx, XFS_SCRUB_TYPE_PROBE, true); | |
661 | } | |
662 | ||
663 | /* General repair routines. */ | |
664 | ||
665 | /* Repair some metadata. */ | |
666 | enum check_outcome | |
667 | xfs_repair_metadata( | |
668 | struct scrub_ctx *ctx, | |
669 | int fd, | |
670 | struct repair_item *ri, | |
671 | unsigned int repair_flags) | |
672 | { | |
673 | char buf[DESCR_BUFSZ]; | |
674 | struct xfs_scrub_metadata meta = { 0 }; | |
675 | struct xfs_scrub_metadata oldm; | |
676 | int error; | |
677 | ||
678 | assert(ri->type < XFS_SCRUB_TYPE_NR); | |
679 | assert(!debug_tweak_on("XFS_SCRUB_NO_KERNEL")); | |
680 | meta.sm_type = ri->type; | |
681 | meta.sm_flags = ri->flags | XFS_SCRUB_IFLAG_REPAIR; | |
682 | switch (scrubbers[ri->type].type) { | |
683 | case ST_AGHEADER: | |
684 | case ST_PERAG: | |
685 | meta.sm_agno = ri->agno; | |
686 | break; | |
687 | case ST_INODE: | |
688 | meta.sm_ino = ri->ino; | |
689 | meta.sm_gen = ri->gen; | |
690 | break; | |
691 | default: | |
692 | break; | |
693 | } | |
694 | ||
695 | /* | |
696 | * If this is a preen operation but we're only repairing | |
697 | * critical items, defer the preening until later. | |
698 | */ | |
699 | if (!needs_repair(&meta) && (repair_flags & XRM_REPAIR_ONLY)) | |
700 | return CHECK_RETRY; | |
701 | ||
702 | memcpy(&oldm, &meta, sizeof(oldm)); | |
703 | format_scrub_descr(buf, DESCR_BUFSZ, &meta, &scrubbers[meta.sm_type]); | |
704 | ||
705 | if (needs_repair(&meta)) | |
706 | str_info(ctx, buf, _("Attempting repair.")); | |
707 | else if (debug || verbose) | |
708 | str_info(ctx, buf, _("Attempting optimization.")); | |
709 | ||
710 | error = ioctl(fd, XFS_IOC_SCRUB_METADATA, &meta); | |
711 | /* | |
712 | * If the caller doesn't want us to complain, tell the caller to | |
713 | * requeue the repair for later and don't say a thing. | |
714 | */ | |
715 | if (!(repair_flags & XRM_NOFIX_COMPLAIN) && | |
716 | (error || needs_repair(&meta))) | |
717 | return CHECK_RETRY; | |
718 | if (error) { | |
719 | switch (errno) { | |
720 | case EDEADLOCK: | |
721 | case EBUSY: | |
722 | /* Filesystem is busy, try again later. */ | |
723 | if (debug || verbose) | |
724 | str_info(ctx, buf, | |
725 | _("Filesystem is busy, deferring repair.")); | |
726 | return CHECK_RETRY; | |
727 | case ESHUTDOWN: | |
728 | /* Filesystem is already shut down, abort. */ | |
82377bde | 729 | str_info(ctx, buf, |
19852474 DW |
730 | _("Filesystem is shut down, aborting.")); |
731 | return CHECK_ABORT; | |
732 | case ENOTTY: | |
733 | case EOPNOTSUPP: | |
734 | /* | |
735 | * If we forced repairs, don't complain if kernel | |
736 | * doesn't know how to fix. | |
737 | */ | |
738 | if (debug_tweak_on("XFS_SCRUB_FORCE_REPAIR")) | |
739 | return CHECK_DONE; | |
740 | /* fall through */ | |
741 | case EINVAL: | |
742 | /* Kernel doesn't know how to repair this? */ | |
743 | str_error(ctx, buf, | |
744 | _("Don't know how to fix; offline repair required.")); | |
745 | return CHECK_DONE; | |
746 | case EROFS: | |
747 | /* Read-only filesystem, can't fix. */ | |
748 | if (verbose || debug || needs_repair(&oldm)) | |
749 | str_info(ctx, buf, | |
750 | _("Read-only filesystem; cannot make changes.")); | |
751 | return CHECK_DONE; | |
752 | case ENOENT: | |
753 | /* Metadata not present, just skip it. */ | |
754 | return CHECK_DONE; | |
755 | case ENOMEM: | |
756 | case ENOSPC: | |
757 | /* Don't care if preen fails due to low resources. */ | |
758 | if (is_unoptimized(&oldm) && !needs_repair(&oldm)) | |
759 | return CHECK_DONE; | |
760 | /* fall through */ | |
761 | default: | |
762 | /* Operational error. */ | |
763 | str_errno(ctx, buf); | |
764 | return CHECK_DONE; | |
765 | } | |
766 | } | |
767 | if (repair_flags & XRM_NOFIX_COMPLAIN) | |
768 | xfs_scrub_warn_incomplete_scrub(ctx, buf, &meta); | |
769 | if (needs_repair(&meta)) { | |
770 | /* Still broken, try again or fix offline. */ | |
771 | if (repair_flags & XRM_NOFIX_COMPLAIN) | |
772 | str_error(ctx, buf, | |
773 | _("Repair unsuccessful; offline repair required.")); | |
774 | } else { | |
775 | /* Clean operation, no corruption detected. */ | |
776 | if (needs_repair(&oldm)) | |
777 | record_repair(ctx, buf, _("Repairs successful.")); | |
778 | else | |
779 | record_preen(ctx, buf, _("Optimization successful.")); | |
780 | } | |
781 | return CHECK_DONE; | |
782 | } |