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Print the root generation in btrfs-debug-tree
[btrfs-progs-unstable/devel.git] / scrub.c
blob9dca5f62e6b08c9127895130ae113474fc40ec6f
1 /*
2 * Copyright (C) 2011 STRATO. All rights reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public
6 * License v2 as published by the Free Software Foundation.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * General Public License for more details.
12 *
13 * You should have received a copy of the GNU General Public
14 * License along with this program; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 021110-1307, USA.
17 */
18
19 #include <sys/ioctl.h>
20 #include <sys/wait.h>
21 #include <sys/stat.h>
22 #include <sys/types.h>
23 #include <sys/socket.h>
24 #include <sys/un.h>
25 #include <poll.h>
26 #include <sys/file.h>
27 #include <uuid/uuid.h>
28 #include <fcntl.h>
29 #include <unistd.h>
30 #include <pthread.h>
31 #include <ctype.h>
32 #include <signal.h>
33 #include <stdarg.h>
34
35 #include "ctree.h"
36 #include "ioctl.h"
37 #include "btrfs_cmds.h"
38 #include "utils.h"
39 #include "volumes.h"
40 #include "disk-io.h"
41
42 #define SCRUB_DATA_FILE "/var/lib/btrfs/scrub.status"
43 #define SCRUB_PROGRESS_SOCKET_PATH "/var/lib/btrfs/scrub.progress"
44 #define SCRUB_FILE_VERSION_PREFIX "scrub status"
45 #define SCRUB_FILE_VERSION "1"
46
47 struct scrub_stats {
48 time_t t_start;
49 time_t t_resumed;
50 u64 duration;
51 u64 finished;
52 u64 canceled;
53 };
54
55 struct scrub_progress {
56 struct btrfs_ioctl_scrub_args scrub_args;
57 int fd;
58 int ret;
59 int skip;
60 struct scrub_stats stats;
61 struct scrub_file_record *resumed;
62 int ioctl_errno;
63 pthread_mutex_t progress_mutex;
64 };
65
66 struct scrub_file_record {
67 u8 fsid[BTRFS_FSID_SIZE];
68 u64 devid;
69 struct scrub_stats stats;
70 struct btrfs_scrub_progress p;
71 };
72
73 struct scrub_progress_cycle {
74 int fdmnt;
75 int prg_fd;
76 int do_record;
77 struct btrfs_ioctl_fs_info_args *fi;
78 struct scrub_progress *progress;
79 struct scrub_progress *shared_progress;
80 pthread_mutex_t *write_mutex;
81 };
82
83 struct scrub_fs_stat {
84 struct btrfs_scrub_progress p;
85 struct scrub_stats s;
86 int i;
87 };
88
89 static void print_scrub_full(struct btrfs_scrub_progress *sp)
90 {
91 printf("\tdata_extents_scrubbed: %lld\n", sp->data_extents_scrubbed);
92 printf("\ttree_extents_scrubbed: %lld\n", sp->tree_extents_scrubbed);
93 printf("\tdata_bytes_scrubbed: %lld\n", sp->data_bytes_scrubbed);
94 printf("\ttree_bytes_scrubbed: %lld\n", sp->tree_bytes_scrubbed);
95 printf("\tread_errors: %lld\n", sp->read_errors);
96 printf("\tcsum_errors: %lld\n", sp->csum_errors);
97 printf("\tverify_errors: %lld\n", sp->verify_errors);
98 printf("\tno_csum: %lld\n", sp->no_csum);
99 printf("\tcsum_discards: %lld\n", sp->csum_discards);
100 printf("\tsuper_errors: %lld\n", sp->super_errors);
101 printf("\tmalloc_errors: %lld\n", sp->malloc_errors);
102 printf("\tuncorrectable_errors: %lld\n", sp->uncorrectable_errors);
103 printf("\tunverified_errors: %lld\n", sp->unverified_errors);
104 printf("\tcorrected_errors: %lld\n", sp->corrected_errors);
105 printf("\tlast_physical: %lld\n", sp->last_physical);
106 }
107
108 #define ERR(test, ...) do { \
109 if (test) \
110 fprintf(stderr, __VA_ARGS__); \
111 } while (0)
112
113 #define PRINT_SCRUB_ERROR(test, desc) do { \
114 if (test) \
115 printf(" %s=%llu", desc, test); \
116 } while (0)
117
118 static void print_scrub_summary(struct btrfs_scrub_progress *p)
119 {
120 u64 err_cnt;
121 u64 err_cnt2;
122 char *bytes;
123
124 err_cnt = p->read_errors +
125 p->csum_errors +
126 p->verify_errors +
127 p->super_errors;
128
129 err_cnt2 = p->corrected_errors + p->uncorrectable_errors;
130
131 if (p->malloc_errors)
132 printf("*** WARNING: memory allocation failed while scrubbing. "
133 "results may be inaccurate\n");
134 bytes = pretty_sizes(p->data_bytes_scrubbed + p->tree_bytes_scrubbed);
135 printf("\ttotal bytes scrubbed: %s with %llu errors\n", bytes,
136 max(err_cnt, err_cnt2));
137 free(bytes);
138 if (err_cnt || err_cnt2) {
139 printf("\terror details:");
140 PRINT_SCRUB_ERROR(p->read_errors, "read");
141 PRINT_SCRUB_ERROR(p->super_errors, "super");
142 PRINT_SCRUB_ERROR(p->verify_errors, "verify");
143 PRINT_SCRUB_ERROR(p->csum_errors, "csum");
144 printf("\n");
145 printf("\tcorrected errors: %llu, uncorrectable errors: %llu, "
146 "unverified errors: %llu\n", p->corrected_errors,
147 p->uncorrectable_errors, p->unverified_errors);
148 }
149 }
150
151 #define _SCRUB_FS_STAT(p, name, fs_stat) do { \
152 fs_stat->p.name += p->name; \
153 } while (0)
154
155 #define _SCRUB_FS_STAT_MIN(ss, name, fs_stat) \
156 do { \
157 if (fs_stat->s.name > ss->name) { \
158 fs_stat->s.name = ss->name; \
159 } \
160 } while (0)
161
162 #define _SCRUB_FS_STAT_ZMIN(ss, name, fs_stat) \
163 do { \
164 if (!fs_stat->s.name || fs_stat->s.name > ss->name) { \
165 fs_stat->s.name = ss->name; \
166 } \
167 } while (0)
168
169 #define _SCRUB_FS_STAT_ZMAX(ss, name, fs_stat) \
170 do { \
171 if (!(fs_stat)->s.name || (fs_stat)->s.name < (ss)->name) { \
172 (fs_stat)->s.name = (ss)->name; \
173 } \
174 } while (0)
175
176 static void add_to_fs_stat(struct btrfs_scrub_progress *p,
177 struct scrub_stats *ss,
178 struct scrub_fs_stat *fs_stat)
179 {
180 _SCRUB_FS_STAT(p, data_extents_scrubbed, fs_stat);
181 _SCRUB_FS_STAT(p, tree_extents_scrubbed, fs_stat);
182 _SCRUB_FS_STAT(p, data_bytes_scrubbed, fs_stat);
183 _SCRUB_FS_STAT(p, tree_bytes_scrubbed, fs_stat);
184 _SCRUB_FS_STAT(p, read_errors, fs_stat);
185 _SCRUB_FS_STAT(p, csum_errors, fs_stat);
186 _SCRUB_FS_STAT(p, verify_errors, fs_stat);
187 _SCRUB_FS_STAT(p, no_csum, fs_stat);
188 _SCRUB_FS_STAT(p, csum_discards, fs_stat);
189 _SCRUB_FS_STAT(p, super_errors, fs_stat);
190 _SCRUB_FS_STAT(p, malloc_errors, fs_stat);
191 _SCRUB_FS_STAT(p, uncorrectable_errors, fs_stat);
192 _SCRUB_FS_STAT(p, corrected_errors, fs_stat);
193 _SCRUB_FS_STAT(p, last_physical, fs_stat);
194 _SCRUB_FS_STAT_ZMIN(ss, t_start, fs_stat);
195 _SCRUB_FS_STAT_ZMIN(ss, t_resumed, fs_stat);
196 _SCRUB_FS_STAT_ZMAX(ss, duration, fs_stat);
197 _SCRUB_FS_STAT_ZMAX(ss, canceled, fs_stat);
198 _SCRUB_FS_STAT_MIN(ss, finished, fs_stat);
199 }
200
201 static void init_fs_stat(struct scrub_fs_stat *fs_stat)
202 {
203 memset(fs_stat, 0, sizeof(*fs_stat));
204 fs_stat->s.finished = 1;
205 }
206
207 static void _print_scrub_ss(struct scrub_stats *ss)
208 {
209 char t[4096];
210 struct tm tm;
211
212 if (!ss || !ss->t_start) {
213 printf("\tno stats available\n");
214 return;
215 }
216 if (ss->t_resumed) {
217 localtime_r(&ss->t_resumed, &tm);
218 strftime(t, sizeof(t), "%c", &tm);
219 t[sizeof(t) - 1] = '\0';
220 printf("\tscrub resumed at %s", t);
221 } else {
222 localtime_r(&ss->t_start, &tm);
223 strftime(t, sizeof(t), "%c", &tm);
224 t[sizeof(t) - 1] = '\0';
225 printf("\tscrub started at %s", t);
226 }
227 if (ss->finished && !ss->canceled) {
228 printf(" and finished after %llu seconds\n",
229 ss->duration);
230 } else if (ss->canceled) {
231 printf(" and was aborted after %llu seconds\n",
232 ss->duration);
233 } else {
234 printf(", running for %llu seconds\n", ss->duration);
235 }
236 }
237
238 static void print_scrub_dev(struct btrfs_ioctl_dev_info_args *di,
239 struct btrfs_scrub_progress *p, int raw,
240 const char *append, struct scrub_stats *ss)
241 {
242 printf("scrub device %s (id %llu) %s\n", di->path, di->devid,
243 append ? append : "");
244
245 _print_scrub_ss(ss);
246
247 if (p) {
248 if (raw)
249 print_scrub_full(p);
250 else
251 print_scrub_summary(p);
252 }
253 }
254
255 static void print_fs_stat(struct scrub_fs_stat *fs_stat, int raw)
256 {
257 _print_scrub_ss(&fs_stat->s);
258
259 if (raw)
260 print_scrub_full(&fs_stat->p);
261 else
262 print_scrub_summary(&fs_stat->p);
263 }
264
265 static void free_history(struct scrub_file_record **last_scrubs)
266 {
267 struct scrub_file_record **l = last_scrubs;
268 if (!l)
269 return;
270 while (*l)
271 free(*l++);
272 free(last_scrubs);
273 }
274
275 /*
276 * cancels a running scrub and makes the master process record the current
277 * progress status before exiting.
278 */
279 static int cancel_fd = -1;
280 static void scrub_sigint_record_progress(int signal)
281 {
282 ioctl(cancel_fd, BTRFS_IOC_SCRUB_CANCEL, NULL);
283 }
284
285 static int scrub_handle_sigint_parent(void)
286 {
287 struct sigaction sa = {
288 .sa_handler = SIG_IGN,
289 .sa_flags = SA_RESTART,
290 };
291
292 return sigaction(SIGINT, &sa, NULL);
293 }
294
295 static int scrub_handle_sigint_child(int fd)
296 {
297 struct sigaction sa = {
298 .sa_handler = fd == -1 ? SIG_DFL : scrub_sigint_record_progress,
299 };
300
301 cancel_fd = fd;
302 return sigaction(SIGINT, &sa, NULL);
303 }
304
305 static int scrub_datafile(const char *fn_base, const char *fn_local,
306 const char *fn_tmp, char *datafile, int size)
307 {
308 int ret;
309 int end = size - 2;
310
311 datafile[end + 1] = '\0';
312 strncpy(datafile, fn_base, end);
313 ret = strlen(datafile);
314
315 if (ret + 1 > end)
316 return -EOVERFLOW;
317
318 datafile[ret] = '.';
319 strncpy(datafile + ret + 1, fn_local, end - ret - 1);
320 ret = strlen(datafile);
321
322 if (ret + 1 > end)
323 return -EOVERFLOW;
324
325 if (fn_tmp) {
326 datafile[ret] = '_';
327 strncpy(datafile + ret + 1, fn_tmp, end - ret - 1);
328 ret = strlen(datafile);
329
330 if (ret > end)
331 return -EOVERFLOW;
332 }
333
334 return 0;
335 }
336
337 static int scrub_open_file(const char *datafile, int m)
338 {
339 int fd;
340 int ret;
341
342 fd = open(datafile, m, 0600);
343 if (fd < 0)
344 return -errno;
345
346 ret = flock(fd, LOCK_EX|LOCK_NB);
347 if (ret) {
348 ret = errno;
349 close(fd);
350 return -ret;
351 }
352
353 return fd;
354 }
355
356 static int scrub_open_file_r(const char *fn_base, const char *fn_local)
357 {
358 int ret;
359 char datafile[BTRFS_PATH_NAME_MAX + 1];
360 ret = scrub_datafile(fn_base, fn_local, NULL,
361 datafile, sizeof(datafile));
362 if (ret < 0)
363 return ret;
364 return scrub_open_file(datafile, O_RDONLY);
365 }
366
367 static int scrub_open_file_w(const char *fn_base, const char *fn_local,
368 const char *tmp)
369 {
370 int ret;
371 char datafile[BTRFS_PATH_NAME_MAX + 1];
372 ret = scrub_datafile(fn_base, fn_local, tmp,
373 datafile, sizeof(datafile));
374 if (ret < 0)
375 return ret;
376 return scrub_open_file(datafile, O_WRONLY|O_CREAT);
377 }
378
379 static int scrub_rename_file(const char *fn_base, const char *fn_local,
380 const char *tmp)
381 {
382 int ret;
383 char datafile_old[BTRFS_PATH_NAME_MAX + 1];
384 char datafile_new[BTRFS_PATH_NAME_MAX + 1];
385 ret = scrub_datafile(fn_base, fn_local, tmp,
386 datafile_old, sizeof(datafile_old));
387 if (ret < 0)
388 return ret;
389 ret = scrub_datafile(fn_base, fn_local, NULL,
390 datafile_new, sizeof(datafile_new));
391 if (ret < 0)
392 return ret;
393 ret = rename(datafile_old, datafile_new);
394 return ret ? -errno : 0;
395 }
396
397 #define _SCRUB_KVREAD(ret, i, name, avail, l, dest) if (ret == 0) { \
398 ret = scrub_kvread(i, sizeof(#name), avail, l, #name, dest.name); \
399 }
400
401 /*
402 * returns 0 if the key did not match (nothing was read)
403 * 1 if the key did match (success)
404 * -1 if the key did match and an error occured
405 */
406 static int scrub_kvread(int *i, int len, int avail, const char *buf,
407 const char *key, u64 *dest)
408 {
409 int j;
410
411 if (*i + len + 1 < avail && strncmp(&buf[*i], key, len - 1) == 0) {
412 *i += len - 1;
413 if (buf[*i] != ':')
414 return -1;
415 *i += 1;
416 for (j = 0; isdigit(buf[*i + j]) && *i + j < avail; ++j)
417 ;
418 if (*i + j >= avail)
419 return -1;
420 *dest = atoll(&buf[*i]);
421 *i += j;
422 return 1;
423 }
424
425 return 0;
426 }
427
428 #define _SCRUB_INVALID do { \
429 if (report_errors) \
430 fprintf(stderr, "WARNING: invalid data in line %d pos " \
431 "%d state %d (near \"%.*s\") at %s:%d\n", \
432 lineno, i, state, 20 > avail ? avail : 20, \
433 l + i, __FILE__, __LINE__); \
434 goto skip; \
435 } while (0)
436
437 static struct scrub_file_record **scrub_read_file(int fd, int report_errors)
438 {
439 int avail = 0;
440 int old_avail = 0;
441 char l[16 * 1024];
442 int state = 0;
443 int curr = -1;
444 int i = 0;
445 int j;
446 int ret;
447 int eof = 0;
448 int lineno = 0;
449 u64 version;
450 char empty_uuid[BTRFS_FSID_SIZE] = {0};
451 struct scrub_file_record **p = NULL;
452
453 if (fd < 0)
454 return ERR_PTR(-EINVAL);
455
456 again:
457 old_avail = avail - i;
458 BUG_ON(old_avail < 0);
459 if (old_avail)
460 memmove(l, l + i, old_avail);
461 avail = read(fd, l + old_avail, sizeof(l) - old_avail);
462 if (avail == 0)
463 eof = 1;
464 if (avail == 0 && old_avail == 0) {
465 if (curr >= 0 &&
466 memcmp(p[curr]->fsid, empty_uuid, BTRFS_FSID_SIZE) == 0) {
467 p[curr] = NULL;
468 } else if (curr == -1) {
469 p = ERR_PTR(-ENODATA);
470 }
471 return p;
472 }
473 if (avail == -1)
474 return ERR_PTR(-errno);
475 avail += old_avail;
476
477 i = 0;
478 while (i < avail) {
479 switch (state) {
480 case 0: /* start of file */
481 ret = scrub_kvread(&i,
482 sizeof(SCRUB_FILE_VERSION_PREFIX), avail, l,
483 SCRUB_FILE_VERSION_PREFIX, &version);
484 if (ret != 1)
485 _SCRUB_INVALID;
486 if (version != atoll(SCRUB_FILE_VERSION))
487 return ERR_PTR(-ENOTSUP);
488 state = 6;
489 continue;
490 case 1: /* start of line, alloc */
491 /*
492 * this state makes sure we have a complete line in
493 * further processing, so we don't need wrap-tracking
494 * everywhere.
495 */
496 if (!eof && !memchr(l + i, '\n', avail - i))
497 goto again;
498 ++lineno;
499 if (curr > -1 && memcmp(p[curr]->fsid, empty_uuid,
500 BTRFS_FSID_SIZE) == 0) {
501 state = 2;
502 continue;
503 }
504 ++curr;
505 p = realloc(p, (curr + 2) * sizeof(*p));
506 if (p)
507 p[curr] = malloc(sizeof(**p));
508 if (!p || !p[curr])
509 return ERR_PTR(-errno);
510 memset(p[curr], 0, sizeof(**p));
511 p[curr + 1] = NULL;
512 ++state;
513 /* fall through */
514 case 2: /* start of line, skip space */
515 while (isspace(l[i]) && i < avail) {
516 if (l[i] == '\n')
517 ++lineno;
518 ++i;
519 }
520 if (i >= avail ||
521 (!eof && !memchr(l + i, '\n', avail - i)))
522 goto again;
523 ++state;
524 /* fall through */
525 case 3: /* read fsid */
526 if (i == avail)
527 continue;
528 for (j = 0; l[i + j] != ':' && i + j < avail; ++j)
529 ;
530 if (i + j + 1 >= avail)
531 _SCRUB_INVALID;
532 if (j != 36)
533 _SCRUB_INVALID;
534 l[i + j] = '\0';
535 ret = uuid_parse(l + i, p[curr]->fsid);
536 if (ret)
537 _SCRUB_INVALID;
538 i += j + 1;
539 ++state;
540 /* fall through */
541 case 4: /* read dev id */
542 for (j = 0; isdigit(l[i + j]) && i+j < avail; ++j)
543 ;
544 if (j == 0 || i + j + 1 >= avail)
545 _SCRUB_INVALID;
546 p[curr]->devid = atoll(&l[i]);
547 i += j + 1;
548 ++state;
549 /* fall through */
550 case 5: /* read key/value pair */
551 ret = 0;
552 _SCRUB_KVREAD(ret, &i, data_extents_scrubbed, avail, l,
553 &p[curr]->p);
554 _SCRUB_KVREAD(ret, &i, data_extents_scrubbed, avail, l,
555 &p[curr]->p);
556 _SCRUB_KVREAD(ret, &i, tree_extents_scrubbed, avail, l,
557 &p[curr]->p);
558 _SCRUB_KVREAD(ret, &i, data_bytes_scrubbed, avail, l,
559 &p[curr]->p);
560 _SCRUB_KVREAD(ret, &i, tree_bytes_scrubbed, avail, l,
561 &p[curr]->p);
562 _SCRUB_KVREAD(ret, &i, read_errors, avail, l,
563 &p[curr]->p);
564 _SCRUB_KVREAD(ret, &i, csum_errors, avail, l,
565 &p[curr]->p);
566 _SCRUB_KVREAD(ret, &i, verify_errors, avail, l,
567 &p[curr]->p);
568 _SCRUB_KVREAD(ret, &i, no_csum, avail, l,
569 &p[curr]->p);
570 _SCRUB_KVREAD(ret, &i, csum_discards, avail, l,
571 &p[curr]->p);
572 _SCRUB_KVREAD(ret, &i, super_errors, avail, l,
573 &p[curr]->p);
574 _SCRUB_KVREAD(ret, &i, malloc_errors, avail, l,
575 &p[curr]->p);
576 _SCRUB_KVREAD(ret, &i, uncorrectable_errors, avail, l,
577 &p[curr]->p);
578 _SCRUB_KVREAD(ret, &i, corrected_errors, avail, l,
579 &p[curr]->p);
580 _SCRUB_KVREAD(ret, &i, last_physical, avail, l,
581 &p[curr]->p);
582 _SCRUB_KVREAD(ret, &i, finished, avail, l,
583 &p[curr]->stats);
584 _SCRUB_KVREAD(ret, &i, t_start, avail, l,
585 (u64 *)&p[curr]->stats);
586 _SCRUB_KVREAD(ret, &i, t_resumed, avail, l,
587 (u64 *)&p[curr]->stats);
588 _SCRUB_KVREAD(ret, &i, duration, avail, l,
589 (u64 *)&p[curr]->stats);
590 _SCRUB_KVREAD(ret, &i, canceled, avail, l,
591 &p[curr]->stats);
592 if (ret != 1)
593 _SCRUB_INVALID;
594 ++state;
595 /* fall through */
596 case 6: /* after number */
597 if (l[i] == '|')
598 state = 5;
599 else if (l[i] == '\n')
600 state = 1;
601 else
602 _SCRUB_INVALID;
603 ++i;
604 continue;
605 case 99: /* skip rest of line */
606 skip:
607 state = 99;
608 do {
609 ++i;
610 if (l[i - 1] == '\n') {
611 state = 1;
612 break;
613 }
614 } while (i < avail);
615 continue;
616 }
617 BUG();
618 }
619 goto again;
620 }
621
622 static int scrub_write_buf(int fd, const void *data, int len)
623 {
624 int ret;
625 ret = write(fd, data, len);
626 return ret - len;
627 }
628
629 static int scrub_writev(int fd, char *buf, int max, const char *fmt, ...)
630 __attribute__ ((format (printf, 4, 5)));
631 static int scrub_writev(int fd, char *buf, int max, const char *fmt, ...)
632 {
633 int ret;
634 va_list args;
635
636 va_start(args, fmt);
637 ret = vsnprintf(buf, max, fmt, args);
638 va_end(args);
639 if (ret >= max)
640 return ret - max;
641 return scrub_write_buf(fd, buf, ret);
642 }
643
644 #define _SCRUB_SUM(dest, data, name) dest->scrub_args.progress.name = \
645 data->resumed->p.name + data->scrub_args.progress.name
646
647 static struct scrub_progress *scrub_resumed_stats(struct scrub_progress *data,
648 struct scrub_progress *dest)
649 {
650 if (!data->resumed || data->skip)
651 return data;
652
653 _SCRUB_SUM(dest, data, data_extents_scrubbed);
654 _SCRUB_SUM(dest, data, tree_extents_scrubbed);
655 _SCRUB_SUM(dest, data, data_bytes_scrubbed);
656 _SCRUB_SUM(dest, data, tree_bytes_scrubbed);
657 _SCRUB_SUM(dest, data, read_errors);
658 _SCRUB_SUM(dest, data, csum_errors);
659 _SCRUB_SUM(dest, data, verify_errors);
660 _SCRUB_SUM(dest, data, no_csum);
661 _SCRUB_SUM(dest, data, csum_discards);
662 _SCRUB_SUM(dest, data, super_errors);
663 _SCRUB_SUM(dest, data, malloc_errors);
664 _SCRUB_SUM(dest, data, uncorrectable_errors);
665 _SCRUB_SUM(dest, data, corrected_errors);
666 _SCRUB_SUM(dest, data, last_physical);
667 dest->stats.canceled = data->stats.canceled;
668 dest->stats.finished = data->stats.finished;
669 dest->stats.t_resumed = data->stats.t_start;
670 dest->stats.t_start = data->resumed->stats.t_start;
671 dest->stats.duration = data->resumed->stats.duration +
672 data->stats.duration;
673 dest->scrub_args.devid = data->scrub_args.devid;
674 return dest;
675 }
676
677 #define _SCRUB_KVWRITE(fd, buf, name, use) \
678 scrub_kvwrite(fd, buf, sizeof(buf), #name, \
679 use->scrub_args.progress.name)
680
681 #define _SCRUB_KVWRITE_STATS(fd, buf, name, use) \
682 scrub_kvwrite(fd, buf, sizeof(buf), #name, \
683 use->stats.name)
684
685 static int scrub_kvwrite(int fd, char *buf, int max, const char *key, u64 val)
686 {
687 return scrub_writev(fd, buf, max, "|%s:%lld", key, val);
688 }
689
690 static int scrub_write_file(int fd, const char *fsid,
691 struct scrub_progress *data, int n)
692 {
693 int ret = 0;
694 int i;
695 char buf[1024];
696 struct scrub_progress local;
697 struct scrub_progress *use;
698
699 if (n < 1)
700 return -EINVAL;
701
702 /* each -1 is to subtract one \0 byte, the + 2 is for ':' and '\n' */
703 ret = scrub_write_buf(fd, SCRUB_FILE_VERSION_PREFIX ":"
704 SCRUB_FILE_VERSION "\n",
705 (sizeof(SCRUB_FILE_VERSION_PREFIX) - 1) +
706 (sizeof(SCRUB_FILE_VERSION) - 1) + 2);
707 if (ret)
708 return -EOVERFLOW;
709
710 for (i = 0; i < n; ++i) {
711 use = scrub_resumed_stats(&data[i], &local);
712 if (scrub_write_buf(fd, fsid, strlen(fsid)) ||
713 scrub_write_buf(fd, ":", 1) ||
714 scrub_writev(fd, buf, sizeof(buf), "%lld",
715 use->scrub_args.devid) ||
716 scrub_write_buf(fd, buf, ret) ||
717 _SCRUB_KVWRITE(fd, buf, data_extents_scrubbed, use) ||
718 _SCRUB_KVWRITE(fd, buf, tree_extents_scrubbed, use) ||
719 _SCRUB_KVWRITE(fd, buf, data_bytes_scrubbed, use) ||
720 _SCRUB_KVWRITE(fd, buf, tree_bytes_scrubbed, use) ||
721 _SCRUB_KVWRITE(fd, buf, read_errors, use) ||
722 _SCRUB_KVWRITE(fd, buf, csum_errors, use) ||
723 _SCRUB_KVWRITE(fd, buf, verify_errors, use) ||
724 _SCRUB_KVWRITE(fd, buf, no_csum, use) ||
725 _SCRUB_KVWRITE(fd, buf, csum_discards, use) ||
726 _SCRUB_KVWRITE(fd, buf, super_errors, use) ||
727 _SCRUB_KVWRITE(fd, buf, malloc_errors, use) ||
728 _SCRUB_KVWRITE(fd, buf, uncorrectable_errors, use) ||
729 _SCRUB_KVWRITE(fd, buf, corrected_errors, use) ||
730 _SCRUB_KVWRITE(fd, buf, last_physical, use) ||
731 _SCRUB_KVWRITE_STATS(fd, buf, t_start, use) ||
732 _SCRUB_KVWRITE_STATS(fd, buf, t_resumed, use) ||
733 _SCRUB_KVWRITE_STATS(fd, buf, duration, use) ||
734 _SCRUB_KVWRITE_STATS(fd, buf, canceled, use) ||
735 _SCRUB_KVWRITE_STATS(fd, buf, finished, use) ||
736 scrub_write_buf(fd, "\n", 1)) {
737 return -EOVERFLOW;
738 }
739 }
740
741 return 0;
742 }
743
744 static int scrub_write_progress(pthread_mutex_t *m, const char *fsid,
745 struct scrub_progress *data, int n)
746 {
747 int ret;
748 int err;
749 int fd = 0;
750 int old;
751
752 ret = pthread_mutex_lock(m);
753 if (ret) {
754 err = -errno;
755 goto out;
756 }
757
758 ret = pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &old);
759 if (ret) {
760 err = -ret;
761 goto out;
762 }
763
764 fd = scrub_open_file_w(SCRUB_DATA_FILE, fsid, "tmp");
765 if (fd < 0) {
766 err = fd;
767 goto out;
768 }
769 err = scrub_write_file(fd, fsid, data, n);
770 if (err)
771 goto out;
772 err = scrub_rename_file(SCRUB_DATA_FILE, fsid, "tmp");
773 if (err)
774 goto out;
775
776 out:
777 if (fd > 0) {
778 ret = close(fd);
779 if (ret)
780 err = -errno;
781 }
782
783 ret = pthread_mutex_unlock(m);
784 if (ret && !err)
785 err = -ret;
786
787 ret = pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &old);
788 if (ret && !err)
789 err = -ret;
790
791 return err;
792 }
793
794 static void *scrub_one_dev(void *ctx)
795 {
796 struct scrub_progress *sp = ctx;
797 int ret;
798 struct timeval tv;
799
800 sp->stats.canceled = 0;
801 sp->stats.duration = 0;
802 sp->stats.finished = 0;
803
804 ret = ioctl(sp->fd, BTRFS_IOC_SCRUB, &sp->scrub_args);
805 gettimeofday(&tv, NULL);
806 sp->ret = ret;
807 sp->stats.duration = tv.tv_sec - sp->stats.t_start;
808 sp->stats.canceled = !!ret;
809 sp->ioctl_errno = errno;
810 ret = pthread_mutex_lock(&sp->progress_mutex);
811 if (ret)
812 return ERR_PTR(-ret);
813 sp->stats.finished = 1;
814 ret = pthread_mutex_unlock(&sp->progress_mutex);
815 if (ret)
816 return ERR_PTR(-ret);
817
818 return NULL;
819 }
820
821 static void *progress_one_dev(void *ctx)
822 {
823 struct scrub_progress *sp = ctx;
824
825 sp->ret = ioctl(sp->fd, BTRFS_IOC_SCRUB_PROGRESS, &sp->scrub_args);
826 sp->ioctl_errno = errno;
827
828 return NULL;
829 }
830
831 static void *scrub_progress_cycle(void *ctx)
832 {
833 int ret;
834 int old;
835 int i;
836 char fsid[37];
837 struct scrub_progress *sp;
838 struct scrub_progress *sp_last;
839 struct scrub_progress *sp_shared;
840 struct timeval tv;
841 struct scrub_progress_cycle *spc = ctx;
842 int ndev = spc->fi->num_devices;
843 int this = 1;
844 int last = 0;
845 int peer_fd = -1;
846 struct pollfd accept_poll_fd = {
847 .fd = spc->prg_fd,
848 .events = POLLIN,
849 .revents = 0,
850 };
851 struct pollfd write_poll_fd = {
852 .events = POLLOUT,
853 .revents = 0,
854 };
855 struct sockaddr_un peer;
856 socklen_t peer_size = sizeof(peer);
857
858 ret = pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &old);
859 if (ret)
860 return ERR_PTR(-ret);
861
862 uuid_unparse(spc->fi->fsid, fsid);
863
864 for (i = 0; i < ndev; ++i) {
865 sp = &spc->progress[i];
866 sp_last = &spc->progress[i + ndev];
867 sp_shared = &spc->shared_progress[i];
868 sp->scrub_args.devid = sp_last->scrub_args.devid =
869 sp_shared->scrub_args.devid;
870 sp->fd = sp_last->fd = spc->fdmnt;
871 sp->stats.t_start = sp_last->stats.t_start =
872 sp_shared->stats.t_start;
873 sp->resumed = sp_last->resumed = sp_shared->resumed;
874 sp->skip = sp_last->skip = sp_shared->skip;
875 sp->stats.finished = sp_last->stats.finished =
876 sp_shared->stats.finished;
877 }
878
879 while (1) {
880 ret = poll(&accept_poll_fd, 1, 5 * 1000);
881 if (ret == -1)
882 return ERR_PTR(-errno);
883 if (ret)
884 peer_fd = accept(spc->prg_fd, (struct sockaddr *)&peer,
885 &peer_size);
886 gettimeofday(&tv, NULL);
887 this = (this + 1)%2;
888 last = (last + 1)%2;
889 for (i = 0; i < ndev; ++i) {
890 sp = &spc->progress[this * ndev + i];
891 sp_last = &spc->progress[last * ndev + i];
892 sp_shared = &spc->shared_progress[i];
893 if (sp->stats.finished)
894 continue;
895 progress_one_dev(sp);
896 sp->stats.duration = tv.tv_sec - sp->stats.t_start;
897 if (!sp->ret)
898 continue;
899 if (sp->ioctl_errno != ENOTCONN &&
900 sp->ioctl_errno != ENODEV)
901 return ERR_PTR(-sp->ioctl_errno);
902 /*
903 * scrub finished or device removed, check the
904 * finished flag. if unset, just use the last
905 * result we got for the current write and go
906 * on. flag should be set on next cycle, then.
907 */
908 ret = pthread_mutex_lock(&sp_shared->progress_mutex);
909 if (ret)
910 return ERR_PTR(-ret);
911 if (!sp_shared->stats.finished) {
912 ret = pthread_mutex_unlock(
913 &sp_shared->progress_mutex);
914 if (ret)
915 return ERR_PTR(-ret);
916 memcpy(sp, sp_last, sizeof(*sp));
917 continue;
918 }
919 ret = pthread_mutex_unlock(&sp_shared->progress_mutex);
920 if (ret)
921 return ERR_PTR(-ret);
922 memcpy(sp, sp_shared, sizeof(*sp));
923 memcpy(sp_last, sp_shared, sizeof(*sp));
924 }
925 if (peer_fd != -1) {
926 write_poll_fd.fd = peer_fd;
927 ret = poll(&write_poll_fd, 1, 0);
928 if (ret == -1)
929 return ERR_PTR(-errno);
930 if (ret) {
931 ret = scrub_write_file(
932 peer_fd, fsid,
933 &spc->progress[this * ndev], ndev);
934 if (ret)
935 return ERR_PTR(ret);
936 }
937 close(peer_fd);
938 peer_fd = -1;
939 }
940 if (!spc->do_record)
941 continue;
942 ret = scrub_write_progress(spc->write_mutex, fsid,
943 &spc->progress[this * ndev], ndev);
944 if (ret)
945 return ERR_PTR(ret);
946 }
947 }
948
949 static struct scrub_file_record *last_dev_scrub(
950 struct scrub_file_record *const *const past_scrubs, u64 devid)
951 {
952 int i;
953
954 if (!past_scrubs || IS_ERR(past_scrubs))
955 return NULL;
956
957 for (i = 0; past_scrubs[i]; ++i)
958 if (past_scrubs[i]->devid == devid)
959 return past_scrubs[i];
960
961 return NULL;
962 }
963
964 static int scrub_device_info(int fd, u64 devid,
965 struct btrfs_ioctl_dev_info_args *di_args)
966 {
967 int ret;
968
969 di_args->devid = devid;
970 memset(&di_args->uuid, '\0', sizeof(di_args->uuid));
971
972 ret = ioctl(fd, BTRFS_IOC_DEV_INFO, di_args);
973 return ret ? -errno : 0;
974 }
975
976 static int scrub_fs_info(int fd, char *path,
977 struct btrfs_ioctl_fs_info_args *fi_args,
978 struct btrfs_ioctl_dev_info_args **di_ret)
979 {
980 int ret = 0;
981 int ndevs = 0;
982 int i = 1;
983 struct btrfs_fs_devices *fs_devices_mnt = NULL;
984 struct btrfs_ioctl_dev_info_args *di_args;
985 char mp[BTRFS_PATH_NAME_MAX + 1];
986
987 memset(fi_args, 0, sizeof(*fi_args));
988
989 ret = ioctl(fd, BTRFS_IOC_FS_INFO, fi_args);
990 if (ret && errno == EINVAL) {
991 /* path is no mounted btrfs. try if it's a device */
992 ret = check_mounted_where(fd, path, mp, sizeof(mp),
993 &fs_devices_mnt);
994 if (!ret)
995 return -EINVAL;
996 if (ret < 0)
997 return ret;
998 fi_args->num_devices = 1;
999 fi_args->max_id = fs_devices_mnt->latest_devid;
1000 i = fs_devices_mnt->latest_devid;
1001 memcpy(fi_args->fsid, fs_devices_mnt->fsid, BTRFS_FSID_SIZE);
1002 close(fd);
1003 fd = open_file_or_dir(mp);
1004 if (fd < 0)
1005 return -errno;
1006 } else if (ret) {
1007 return -errno;
1008 }
1009
1010 if (!fi_args->num_devices)
1011 return 0;
1012
1013 di_args = *di_ret = malloc(fi_args->num_devices * sizeof(*di_args));
1014 if (!di_args)
1015 return -errno;
1016
1017 for (; i <= fi_args->max_id; ++i) {
1018 BUG_ON(ndevs >= fi_args->num_devices);
1019 ret = scrub_device_info(fd, i, &di_args[ndevs]);
1020 if (ret == -ENODEV)
1021 continue;
1022 if (ret)
1023 return ret;
1024 ++ndevs;
1025 }
1026
1027 BUG_ON(ndevs == 0);
1028
1029 return 0;
1030 }
1031
1032 int mkdir_p(char *path)
1033 {
1034 int i;
1035 int ret;
1036
1037 for (i = 1; i < strlen(path); ++i) {
1038 if (path[i] != '/')
1039 continue;
1040 path[i] = '\0';
1041 ret = mkdir(path, 0777);
1042 if (ret && errno != EEXIST)
1043 return 1;
1044 path[i] = '/';
1045 }
1046
1047 return 0;
1048 }
1049
1050 static int scrub_start(int argc, char **argv, int resume)
1051 {
1052 int fdmnt;
1053 int prg_fd = -1;
1054 int fdres = -1;
1055 int ret;
1056 pid_t pid;
1057 int c;
1058 int i;
1059 int err = 0;
1060 int e_uncorrectable = 0;
1061 int e_correctable = 0;
1062 int print_raw = 0;
1063 char *path;
1064 int do_background = 1;
1065 int do_wait = 0;
1066 int do_print = 0;
1067 int do_quiet = 0;
1068 int do_record = 1;
1069 int readonly = 0;
1070 int do_stats_per_dev = 0;
1071 int n_start = 0;
1072 int n_skip = 0;
1073 int n_resume = 0;
1074 struct btrfs_ioctl_fs_info_args fi_args;
1075 struct btrfs_ioctl_dev_info_args *di_args = NULL;
1076 struct scrub_progress *sp = NULL;
1077 struct scrub_fs_stat fs_stat;
1078 struct timeval tv;
1079 struct sockaddr_un addr = {
1080 .sun_family = AF_UNIX,
1081 };
1082 pthread_t *t_devs = NULL;
1083 pthread_t t_prog;
1084 pthread_attr_t t_attr;
1085 struct scrub_file_record **past_scrubs = NULL;
1086 struct scrub_file_record *last_scrub = NULL;
1087 char *datafile = strdup(SCRUB_DATA_FILE);
1088 char fsid[37];
1089 char sock_path[BTRFS_PATH_NAME_MAX + 1] = "";
1090 struct scrub_progress_cycle spc;
1091 pthread_mutex_t spc_write_mutex = PTHREAD_MUTEX_INITIALIZER;
1092 void *terr;
1093 u64 devid;
1094
1095 optind = 1;
1096 while ((c = getopt(argc, argv, "BdqrR")) != -1) {
1097 switch (c) {
1098 case 'B':
1099 do_background = 0;
1100 do_wait = 1;
1101 do_print = 1;
1102 break;
1103 case 'd':
1104 do_stats_per_dev = 1;
1105 break;
1106 case 'q':
1107 do_quiet = 1;
1108 break;
1109 case 'r':
1110 readonly = 1;
1111 break;
1112 case 'R':
1113 print_raw = 1;
1114 break;
1115 case '?':
1116 default:
1117 fprintf(stderr, "ERROR: scrub args invalid.\n"
1118 " -B do not background\n"
1119 " -d stats per device (-B only)\n"
1120 " -q quiet\n"
1121 " -r read only mode\n");
1122 return 1;
1123 }
1124 }
1125
1126 /* try to catch most error cases before forking */
1127
1128 if (optind + 1 != argc) {
1129 fprintf(stderr, "ERROR: scrub start needs path as last "
1130 "argument\n");
1131 return 1;
1132 }
1133
1134 spc.progress = NULL;
1135 if (do_quiet && do_print)
1136 do_print = 0;
1137
1138 if (mkdir_p(datafile)) {
1139 ERR(!do_quiet, "WARNING: cannot create scrub data "
1140 "file, mkdir %s failed: %s. Status recording "
1141 "disabled\n", datafile, strerror(errno));
1142 do_record = 0;
1143 }
1144 free(datafile);
1145
1146 path = argv[optind];
1147
1148 fdmnt = open_file_or_dir(path);
1149 if (fdmnt < 0) {
1150 ERR(!do_quiet, "ERROR: can't access '%s'\n", path);
1151 return 12;
1152 }
1153
1154 ret = scrub_fs_info(fdmnt, path, &fi_args, &di_args);
1155 if (ret) {
1156 ERR(!do_quiet, "ERROR: getting dev info for scrub failed: "
1157 "%s\n", strerror(-ret));
1158 err = 1;
1159 goto out;
1160 }
1161 if (!fi_args.num_devices) {
1162 ERR(!do_quiet, "ERROR: no devices found\n");
1163 err = 1;
1164 goto out;
1165 }
1166
1167 uuid_unparse(fi_args.fsid, fsid);
1168 fdres = scrub_open_file_r(SCRUB_DATA_FILE, fsid);
1169 if (fdres < 0 && fdres != -ENOENT) {
1170 ERR(!do_quiet, "WARNING: failed to open status file: "
1171 "%s\n", strerror(-fdres));
1172 } else if (fdres >= 0) {
1173 past_scrubs = scrub_read_file(fdres, !do_quiet);
1174 if (IS_ERR(past_scrubs))
1175 ERR(!do_quiet, "WARNING: failed to read status file: "
1176 "%s\n", strerror(-PTR_ERR(past_scrubs)));
1177 close(fdres);
1178 }
1179
1180 t_devs = malloc(fi_args.num_devices * sizeof(*t_devs));
1181 sp = calloc(fi_args.num_devices, sizeof(*sp));
1182 spc.progress = calloc(fi_args.num_devices * 2, sizeof(*spc.progress));
1183
1184 if (!t_devs || !sp || !spc.progress) {
1185 ERR(!do_quiet, "ERROR: scrub failed: %s", strerror(errno));
1186 err = 1;
1187 goto out;
1188 }
1189
1190 ret = pthread_attr_init(&t_attr);
1191 if (ret) {
1192 ERR(!do_quiet, "ERROR: pthread_attr_init failed: %s\n",
1193 strerror(ret));
1194 err = 1;
1195 goto out;
1196 }
1197
1198 for (i = 0; i < fi_args.num_devices; ++i) {
1199 devid = di_args[i].devid;
1200 ret = pthread_mutex_init(&sp[i].progress_mutex, NULL);
1201 if (ret) {
1202 ERR(!do_quiet, "ERROR: pthread_mutex_init failed: "
1203 "%s\n", strerror(ret));
1204 err = 1;
1205 goto out;
1206 }
1207 last_scrub = last_dev_scrub(past_scrubs, devid);
1208 sp[i].scrub_args.devid = devid;
1209 sp[i].fd = fdmnt;
1210 if (resume && last_scrub && (last_scrub->stats.canceled ||
1211 !last_scrub->stats.finished)) {
1212 ++n_resume;
1213 sp[i].scrub_args.start = last_scrub->p.last_physical;
1214 sp[i].resumed = last_scrub;
1215 } else if (resume) {
1216 ++n_skip;
1217 sp[i].skip = 1;
1218 sp[i].resumed = last_scrub;
1219 continue;
1220 } else {
1221 ++n_start;
1222 sp[i].scrub_args.start = 0ll;
1223 sp[i].resumed = NULL;
1224 }
1225 sp[i].skip = 0;
1226 sp[i].scrub_args.end = (u64)-1ll;
1227 sp[i].scrub_args.flags = readonly ? BTRFS_SCRUB_READONLY : 0;
1228 }
1229
1230 if (!n_start && !n_resume) {
1231 if (!do_quiet)
1232 printf("scrub: nothing to resume for %s, fsid %s\n",
1233 path, fsid);
1234 err = 0;
1235 goto out;
1236 }
1237
1238 ret = prg_fd = socket(AF_UNIX, SOCK_STREAM, 0);
1239 while (ret != -1) {
1240 ret = scrub_datafile(SCRUB_PROGRESS_SOCKET_PATH, fsid, NULL,
1241 sock_path, sizeof(sock_path));
1242 /* ignore EOVERFLOW, try using a shorter path for the socket */
1243 addr.sun_path[sizeof(addr.sun_path) - 1] = '\0';
1244 strncpy(addr.sun_path, sock_path, sizeof(addr.sun_path) - 1);
1245 ret = bind(prg_fd, (struct sockaddr *)&addr, sizeof(addr));
1246 if (ret != -1 || errno != EADDRINUSE)
1247 break;
1248 /*
1249 * bind failed with EADDRINUSE. so let's see if anyone answers
1250 * when we make a call to the socket ...
1251 */
1252 ret = connect(prg_fd, (struct sockaddr *)&addr, sizeof(addr));
1253 if (!ret || errno != ECONNREFUSED) {
1254 /* ... yes, so scrub must be running. error out */
1255 fprintf(stderr, "ERROR: scrub already running\n");
1256 close(prg_fd);
1257 goto out;
1258 }
1259 /*
1260 * ... no, this means someone left us alone with an unused
1261 * socket in the file system. remove it and try again.
1262 */
1263 ret = unlink(sock_path);
1264 }
1265 if (ret != -1)
1266 ret = listen(prg_fd, 100);
1267 if (ret == -1) {
1268 ERR(!do_quiet, "WARNING: failed to open the progress status "
1269 "socket at %s: %s. Progress cannot be queried\n",
1270 sock_path[0] ? sock_path : SCRUB_PROGRESS_SOCKET_PATH,
1271 strerror(errno));
1272 if (prg_fd != -1) {
1273 close(prg_fd);
1274 prg_fd = -1;
1275 if (sock_path[0])
1276 unlink(sock_path);
1277 }
1278 }
1279
1280 if (do_record) {
1281 /* write all-zero progress file for a start */
1282 ret = scrub_write_progress(&spc_write_mutex, fsid, sp,
1283 fi_args.num_devices);
1284 if (ret) {
1285 ERR(!do_quiet, "WARNING: failed to write the progress "
1286 "status file: %s. Status recording disabled\n",
1287 strerror(-ret));
1288 do_record = 0;
1289 }
1290 }
1291
1292 if (do_background) {
1293 pid = fork();
1294 if (pid == -1) {
1295 ERR(!do_quiet, "ERROR: cannot scrub, fork failed: "
1296 "%s\n", strerror(errno));
1297 err = 1;
1298 goto out;
1299 }
1300
1301 if (pid) {
1302 int stat;
1303 scrub_handle_sigint_parent();
1304 if (!do_quiet)
1305 printf("scrub %s on %s, fsid %s (pid=%d)\n",
1306 n_start ? "started" : "resumed",
1307 path, fsid, pid);
1308 if (!do_wait) {
1309 err = 0;
1310 goto out;
1311 }
1312 ret = wait(&stat);
1313 if (ret != pid) {
1314 ERR(!do_quiet, "ERROR: wait failed: (ret=%d) "
1315 "%s\n", ret, strerror(errno));
1316 err = 1;
1317 goto out;
1318 }
1319 if (!WIFEXITED(stat) || WEXITSTATUS(stat)) {
1320 ERR(!do_quiet, "ERROR: scrub process failed\n");
1321 err = WIFEXITED(stat) ? WEXITSTATUS(stat) : -1;
1322 goto out;
1323 }
1324 err = 0;
1325 goto out;
1326 }
1327 }
1328
1329 scrub_handle_sigint_child(fdmnt);
1330
1331 for (i = 0; i < fi_args.num_devices; ++i) {
1332 if (sp[i].skip) {
1333 sp[i].scrub_args.progress = sp[i].resumed->p;
1334 sp[i].stats = sp[i].resumed->stats;
1335 sp[i].ret = 0;
1336 sp[i].stats.finished = 1;
1337 continue;
1338 }
1339 devid = di_args[i].devid;
1340 gettimeofday(&tv, NULL);
1341 sp[i].stats.t_start = tv.tv_sec;
1342 ret = pthread_create(&t_devs[i], &t_attr,
1343 scrub_one_dev, &sp[i]);
1344 if (ret) {
1345 if (do_print)
1346 fprintf(stderr, "ERROR: creating "
1347 "scrub_one_dev[%llu] thread failed: "
1348 "%s\n", devid, strerror(ret));
1349 err = 1;
1350 goto out;
1351 }
1352 }
1353
1354 spc.fdmnt = fdmnt;
1355 spc.prg_fd = prg_fd;
1356 spc.do_record = do_record;
1357 spc.write_mutex = &spc_write_mutex;
1358 spc.shared_progress = sp;
1359 spc.fi = &fi_args;
1360 ret = pthread_create(&t_prog, &t_attr, scrub_progress_cycle, &spc);
1361 if (ret) {
1362 if (do_print)
1363 fprintf(stderr, "ERROR: creating progress thread "
1364 "failed: %s\n", strerror(ret));
1365 err = 1;
1366 goto out;
1367 }
1368
1369 err = 0;
1370 for (i = 0; i < fi_args.num_devices; ++i) {
1371 if (sp[i].skip)
1372 continue;
1373 devid = di_args[i].devid;
1374 ret = pthread_join(t_devs[i], NULL);
1375 if (ret) {
1376 if (do_print)
1377 fprintf(stderr, "ERROR: pthread_join failed "
1378 "for scrub_one_dev[%llu]: %s\n", devid,
1379 strerror(ret));
1380 ++err;
1381 continue;
1382 }
1383 if (sp[i].ret && sp[i].ioctl_errno == ENODEV) {
1384 if (do_print)
1385 fprintf(stderr, "WARNING: device %lld not "
1386 "present\n", devid);
1387 continue;
1388 }
1389 if (sp[i].ret && sp[i].ioctl_errno == ECANCELED) {
1390 ++err;
1391 } else if (sp[i].ret) {
1392 if (do_print)
1393 fprintf(stderr, "ERROR: scrubbing %s failed "
1394 "for device id %lld (%s)\n", path,
1395 devid, strerror(sp[i].ioctl_errno));
1396 ++err;
1397 continue;
1398 }
1399 if (sp[i].scrub_args.progress.uncorrectable_errors > 0)
1400 e_uncorrectable++;
1401 if (sp[i].scrub_args.progress.corrected_errors > 0
1402 || sp[i].scrub_args.progress.unverified_errors > 0)
1403 e_correctable++;
1404 }
1405
1406 if (do_print) {
1407 const char *append = "done";
1408 if (!do_stats_per_dev)
1409 init_fs_stat(&fs_stat);
1410 for (i = 0; i < fi_args.num_devices; ++i) {
1411 if (do_stats_per_dev) {
1412 print_scrub_dev(&di_args[i],
1413 &sp[i].scrub_args.progress,
1414 print_raw,
1415 sp[i].ret ? "canceled" : "done",
1416 &sp[i].stats);
1417 } else {
1418 if (sp[i].ret)
1419 append = "canceled";
1420 add_to_fs_stat(&sp[i].scrub_args.progress,
1421 &sp[i].stats, &fs_stat);
1422 }
1423 }
1424 if (!do_stats_per_dev) {
1425 printf("scrub %s for %s\n", append, fsid);
1426 print_fs_stat(&fs_stat, print_raw);
1427 }
1428 }
1429
1430 ret = pthread_cancel(t_prog);
1431 if (!ret)
1432 ret = pthread_join(t_prog, &terr);
1433 if (do_print && ret) {
1434 fprintf(stderr, "ERROR: progress thead handling failed: %s\n",
1435 strerror(ret));
1436 }
1437
1438 if (do_print && terr && terr != PTHREAD_CANCELED) {
1439 fprintf(stderr, "ERROR: recording progress "
1440 "failed: %s\n", strerror(-PTR_ERR(terr)));
1441 }
1442
1443 if (do_record) {
1444 ret = scrub_write_progress(&spc_write_mutex, fsid, sp,
1445 fi_args.num_devices);
1446 if (ret && do_print) {
1447 fprintf(stderr, "ERROR: failed to record the result: "
1448 "%s\n", strerror(-ret));
1449 }
1450 }
1451
1452 scrub_handle_sigint_child(-1);
1453
1454 out:
1455 free_history(past_scrubs);
1456 free(di_args);
1457 free(t_devs);
1458 free(sp);
1459 free(spc.progress);
1460 if (prg_fd > -1) {
1461 close(prg_fd);
1462 if (sock_path[0])
1463 unlink(sock_path);
1464 }
1465 close(fdmnt);
1466
1467 if (err)
1468 return 1;
1469 if (e_correctable)
1470 return 7;
1471 if (e_uncorrectable)
1472 return 8;
1473 return 0;
1474 }
1475
1476 int do_scrub_start(int argc, char **argv)
1477 {
1478 return scrub_start(argc, argv, 0);
1479 }
1480
1481 int do_scrub_resume(int argc, char **argv)
1482 {
1483 return scrub_start(argc, argv, 1);
1484 }
1485
1486 int do_scrub_cancel(int argc, char **argv)
1487 {
1488 char *path = argv[1];
1489 int ret;
1490 int fdmnt;
1491 int err;
1492 char mp[BTRFS_PATH_NAME_MAX + 1];
1493 struct btrfs_fs_devices *fs_devices_mnt = NULL;
1494
1495 fdmnt = open_file_or_dir(path);
1496 if (fdmnt < 0) {
1497 fprintf(stderr, "ERROR: scrub cancel failed\n");
1498 return 12;
1499 }
1500
1501 again:
1502 ret = ioctl(fdmnt, BTRFS_IOC_SCRUB_CANCEL, NULL);
1503 err = errno;
1504 close(fdmnt);
1505
1506 if (ret && err == EINVAL) {
1507 /* path is no mounted btrfs. try if it's a device */
1508 ret = check_mounted_where(fdmnt, path, mp, sizeof(mp),
1509 &fs_devices_mnt);
1510 close(fdmnt);
1511 if (ret) {
1512 fdmnt = open_file_or_dir(mp);
1513 if (fdmnt >= 0) {
1514 path = mp;
1515 goto again;
1516 }
1517 }
1518 }
1519
1520 if (ret) {
1521 fprintf(stderr, "ERROR: scrub cancel failed on %s: %s\n", path,
1522 err == ENOTCONN ? "not running" : strerror(errno));
1523 return 1;
1524 }
1525
1526 printf("scrub cancelled\n");
1527
1528 return 0;
1529 }
1530
1531 int do_scrub_status(int argc, char **argv)
1532 {
1533
1534 char *path;
1535 struct btrfs_ioctl_fs_info_args fi_args;
1536 struct btrfs_ioctl_dev_info_args *di_args = NULL;
1537 struct scrub_file_record **past_scrubs = NULL;
1538 struct scrub_file_record *last_scrub;
1539 struct scrub_fs_stat fs_stat;
1540 struct sockaddr_un addr = {
1541 .sun_family = AF_UNIX,
1542 };
1543 int ret;
1544 int fdmnt;
1545 int i;
1546 optind = 1;
1547 int print_raw = 0;
1548 int do_stats_per_dev = 0;
1549 char c;
1550 char fsid[37];
1551 int fdres = -1;
1552 int err = 0;
1553
1554 while ((c = getopt(argc, argv, "dR")) != -1) {
1555 switch (c) {
1556 case 'd':
1557 do_stats_per_dev = 1;
1558 break;
1559 case 'R':
1560 print_raw = 1;
1561 break;
1562 case '?':
1563 default:
1564 fprintf(stderr, "ERROR: scrub status args invalid.\n"
1565 " -d stats per device\n");
1566 return 1;
1567 }
1568 }
1569
1570 if (optind + 1 != argc) {
1571 fprintf(stderr, "ERROR: scrub status needs path as last "
1572 "argument\n");
1573 return 1;
1574 }
1575
1576 path = argv[optind];
1577
1578 fdmnt = open_file_or_dir(path);
1579 if (fdmnt < 0) {
1580 fprintf(stderr, "ERROR: can't access to '%s'\n", path);
1581 return 12;
1582 }
1583
1584 ret = scrub_fs_info(fdmnt, path, &fi_args, &di_args);
1585 if (ret) {
1586 fprintf(stderr, "ERROR: getting dev info for scrub failed: "
1587 "%s\n", strerror(-ret));
1588 err = 1;
1589 goto out;
1590 }
1591 if (!fi_args.num_devices) {
1592 fprintf(stderr, "ERROR: no devices found\n");
1593 err = 1;
1594 goto out;
1595 }
1596
1597 uuid_unparse(fi_args.fsid, fsid);
1598
1599 fdres = socket(AF_UNIX, SOCK_STREAM, 0);
1600 if (fdres == -1) {
1601 fprintf(stderr, "ERROR: failed to create socket to "
1602 "receive progress information: %s\n",
1603 strerror(errno));
1604 err = 1;
1605 goto out;
1606 }
1607 scrub_datafile(SCRUB_PROGRESS_SOCKET_PATH, fsid,
1608 NULL, addr.sun_path, sizeof(addr.sun_path));
1609 /* ignore EOVERFLOW, just use shorter name and hope for the best */
1610 addr.sun_path[sizeof(addr.sun_path) - 1] = '\0';
1611 ret = connect(fdres, (struct sockaddr *)&addr, sizeof(addr));
1612 if (ret == -1) {
1613 fdres = scrub_open_file_r(SCRUB_DATA_FILE, fsid);
1614 if (fdres < 0 && fdres != -ENOENT) {
1615 fprintf(stderr, "WARNING: failed to open status file: "
1616 "%s\n", strerror(-fdres));
1617 err = 1;
1618 goto out;
1619 }
1620 }
1621
1622 if (fdres >= 0) {
1623 past_scrubs = scrub_read_file(fdres, 1);
1624 if (IS_ERR(past_scrubs))
1625 fprintf(stderr, "WARNING: failed to read status: %s\n",
1626 strerror(-PTR_ERR(past_scrubs)));
1627 }
1628
1629 printf("scrub status for %s\n", fsid);
1630
1631 if (do_stats_per_dev) {
1632 for (i = 0; i < fi_args.num_devices; ++i) {
1633 last_scrub = last_dev_scrub(past_scrubs,
1634 di_args[i].devid);
1635 if (!last_scrub) {
1636 print_scrub_dev(&di_args[i], NULL, print_raw,
1637 NULL, NULL);
1638 continue;
1639 }
1640 print_scrub_dev(&di_args[i], &last_scrub->p, print_raw,
1641 last_scrub->stats.finished ?
1642 "history" : "status",
1643 &last_scrub->stats);
1644 }
1645 } else {
1646 init_fs_stat(&fs_stat);
1647 for (i = 0; i < fi_args.num_devices; ++i) {
1648 last_scrub = last_dev_scrub(past_scrubs,
1649 di_args[i].devid);
1650 if (!last_scrub)
1651 continue;
1652 add_to_fs_stat(&last_scrub->p, &last_scrub->stats,
1653 &fs_stat);
1654 }
1655 print_fs_stat(&fs_stat, print_raw);
1656 }
1657
1658 out:
1659 free_history(past_scrubs);
1660 free(di_args);
1661 close(fdmnt);
1662 if (fdres > -1)
1663 close(fdres);
1664
1665 return err;
1666 }
(deprecated) Btrfs progs developments and patch integration