1 /*
2 * Copyright (c) 2008 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $DragonFly: src/sbin/hammer/cmd_pseudofs.c,v 1.12 2008/10/08 21:01:54 thomas Exp $
35 */
36
37 #include "hammer.h"
38
39 static int scanpfsid(struct hammer_ioc_pseudofs_rw *pfs, const char *path);
40 static void parse_pfsd_options(char **av, int ac, hammer_pseudofs_data_t pfsd);
41 static void init_pfsd(hammer_pseudofs_data_t pfsd, int is_slave);
42 static void pseudofs_usage(int code);
43 static int timetosecs(char *str);
44
45 void
clrpfs(struct hammer_ioc_pseudofs_rw * pfs,hammer_pseudofs_data_t pfsd,int pfs_id)46 clrpfs(struct hammer_ioc_pseudofs_rw *pfs, hammer_pseudofs_data_t pfsd,
47 int pfs_id)
48 {
49 bzero(pfs, sizeof(*pfs));
50
51 if (pfsd)
52 pfs->ondisk = pfsd;
53 else
54 pfs->ondisk = malloc(sizeof(*pfs->ondisk));
55 bzero(pfs->ondisk, sizeof(*pfs->ondisk));
56
57 pfs->pfs_id = pfs_id;
58 pfs->bytes = sizeof(*pfs->ondisk);
59 pfs->version = HAMMER_IOC_PSEUDOFS_VERSION;
60 }
61
62 /*
63 * If path is a symlink, return strdup'd path.
64 * If it's a directory via symlink, strip trailing /
65 * from strdup'd path and return the symlink.
66 */
67 static
68 char*
getlink(const char * path)69 getlink(const char *path)
70 {
71 int i;
72 char *linkpath;
73 struct stat st;
74
75 if (lstat(path, &st))
76 return(NULL);
77 linkpath = strdup(path);
78
79 if (S_ISDIR(st.st_mode)) {
80 i = strlen(linkpath) - 1;
81 while (i > 0 && linkpath[i] == '/')
82 linkpath[i--] = 0;
83 lstat(linkpath, &st);
84 }
85 if (S_ISLNK(st.st_mode))
86 return(linkpath);
87
88 free(linkpath);
89 return(NULL);
90 }
91
92 /*
93 * Calculate the PFS id given a path to a file/directory or
94 * a @@%llx:%d softlink.
95 */
96 int
getpfs(struct hammer_ioc_pseudofs_rw * pfs,const char * path)97 getpfs(struct hammer_ioc_pseudofs_rw *pfs, const char *path)
98 {
99 char *tmpbuf;
100 int fd;
101
102 clrpfs(pfs, NULL, -1);
103
104 /*
105 * Extract the PFS id.
106 * dirname(path) is supposed to be a directory in root PFS.
107 *
108 * strips trailing / first if any.
109 */
110 tmpbuf = strdup(path);
111 if (scanpfsid(pfs, path) == 0)
112 path = dirname(tmpbuf);
113
114 /*
115 * Open the path regardless of scanpfsid() result, since some
116 * commands can take a regular file/directory (e.g. pfs-status).
117 */
118 fd = open(path, O_RDONLY);
119 if (fd < 0) {
120 err(1, "Failed to open %s", path);
121 /* not reached */
122 }
123
124 /*
125 * If pfs.pfs_id has been set to non -1, the file descriptor fd
126 * could be any fd of HAMMER inodes since HAMMERIOC_GET_PSEUDOFS
127 * doesn't depend on inode attributes if it's set to a valid id.
128 */
129 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, pfs) < 0) {
130 err(1, "Cannot access %s", path);
131 /* not reached */
132 }
133
134 free(tmpbuf);
135
136 return(fd);
137 }
138
139 /*
140 * Extract the PFS id from path.
141 */
142 static
143 int
scanpfsid(struct hammer_ioc_pseudofs_rw * pfs,const char * path)144 scanpfsid(struct hammer_ioc_pseudofs_rw *pfs, const char *path)
145 {
146 char *linkpath;
147 char *tmpbuf;
148 char buf[64];
149 uintmax_t dummy_tid;
150 struct stat st;
151
152 if (stat(path, &st))
153 ; /* possibly slave PFS */
154 else if (S_ISDIR(st.st_mode))
155 ; /* possibly master or slave PFS */
156 else
157 return(-1); /* neither */
158
159 linkpath = getlink(path);
160 if (linkpath) {
161 /*
162 * Read the symlink assuming it's a link to PFS.
163 */
164 bzero(buf, sizeof(buf));
165 if (readlink(linkpath, buf, sizeof(buf) - 1) < 0) {
166 free(linkpath);
167 return(-1);
168 }
169 free(linkpath);
170 path = buf;
171 }
172
173 /*
174 * The symlink created by pfs-master|slave is just a symlink.
175 * One could happen to remove a symlink and relink PFS as
176 * # ln -s ./@@-1:00001 ./link
177 * which results PFS having something extra before @@.
178 * One could also directly use the PFS and results the same.
179 * Get rid of it before we extract the PFS id.
180 */
181 tmpbuf = strdup(path);
182 if (strchr(path, '/')) {
183 path = basename(tmpbuf); /* strips trailing / first if any */
184 if (path == NULL) {
185 err(1, "basename");
186 /* not reached */
187 }
188 }
189
190 /*
191 * Test and extract the PFS id from the link.
192 * "@@%jx:%d" covers both "@@-1:%05d" format for master PFS
193 * and "@@0x%016jx:%05d" format for slave PFS.
194 */
195 if (sscanf(path, "@@%jx:%d", &dummy_tid, &pfs->pfs_id) == 2) {
196 free(tmpbuf);
197 assert(pfs->pfs_id > 0);
198 return(0);
199 }
200 free(tmpbuf);
201
202 return(-1);
203 }
204
205 void
relpfs(int fd,struct hammer_ioc_pseudofs_rw * pfs)206 relpfs(int fd, struct hammer_ioc_pseudofs_rw *pfs)
207 {
208 if (fd >= 0)
209 close(fd);
210 if (pfs->ondisk) {
211 free(pfs->ondisk);
212 pfs->ondisk = NULL;
213 }
214 }
215
216 static
217 void
print_pfs_status(char * path)218 print_pfs_status(char *path)
219 {
220 struct hammer_ioc_pseudofs_rw pfs;
221 int fd;
222
223 fd = getpfs(&pfs, path);
224 printf("%s\t", path);
225 if (fd < 0 || ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) < 0) {
226 printf("Invalid PFS path %s\n", path);
227 } else {
228 printf("PFS#%d {\n", pfs.pfs_id);
229 dump_pfsd(pfs.ondisk, fd);
230 printf("}\n");
231 }
232 if (fd >= 0)
233 close(fd);
234 if (pfs.ondisk)
235 free(pfs.ondisk);
236 relpfs(fd, &pfs);
237 }
238
239 void
hammer_cmd_pseudofs_status(char ** av,int ac)240 hammer_cmd_pseudofs_status(char **av, int ac)
241 {
242 int i;
243
244 if (ac == 0) {
245 char buf[2] = "."; /* can't be readonly string */
246 print_pfs_status(buf);
247 return;
248 }
249
250 for (i = 0; i < ac; ++i)
251 print_pfs_status(av[i]);
252 }
253
254 void
hammer_cmd_pseudofs_create(char ** av,int ac,int is_slave)255 hammer_cmd_pseudofs_create(char **av, int ac, int is_slave)
256 {
257 struct hammer_ioc_pseudofs_rw pfs;
258 struct hammer_pseudofs_data pfsd;
259 struct stat st;
260 const char *path;
261 char *tmpbuf;
262 char *dirpath;
263 char *linkpath;
264 int pfs_id;
265 int fd;
266
267 if (ac == 0) {
268 pseudofs_usage(1);
269 /* not reached */
270 }
271 path = av[0];
272 if (lstat(path, &st) == 0) {
273 errx(1, "Cannot create %s, file exists!", path);
274 /* not reached */
275 } else if (path[strlen(path) - 1] == '/') {
276 errx(1, "Invalid PFS path %s with trailing /", path);
277 /* not reached */
278 }
279
280 /*
281 * Figure out the directory prefix, taking care of degenerate
282 * cases.
283 */
284 tmpbuf = strdup(path);
285 dirpath = dirname(tmpbuf);
286 fd = open(dirpath, O_RDONLY);
287 if (fd < 0) {
288 err(1, "Cannot open directory %s", dirpath);
289 /* not reached */
290 }
291
292 /*
293 * Avoid foot-shooting. Don't let the user create a PFS
294 * softlink via a PFS. PFS softlinks may only be accessed
295 * via the master filesystem. Checking it here ensures
296 * other PFS commands access PFS under the master filesystem.
297 */
298 clrpfs(&pfs, &pfsd, -1);
299
300 ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs);
301 if (pfs.pfs_id != HAMMER_ROOT_PFSID) {
302 fprintf(stderr,
303 "You are attempting to access a PFS softlink "
304 "from a PFS. It may not represent the PFS\n"
305 "on the main filesystem mount that you "
306 "expect! You may only access PFS softlinks\n"
307 "via the main filesystem mount!\n");
308 exit(1);
309 }
310
311 for (pfs_id = 0; pfs_id < HAMMER_MAX_PFS; ++pfs_id) {
312 clrpfs(&pfs, &pfsd, pfs_id);
313 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) < 0) {
314 if (errno != ENOENT) {
315 err(1, "Cannot create %s", path);
316 /* not reached */
317 }
318 break;
319 }
320 }
321 if (pfs_id == HAMMER_MAX_PFS) {
322 errx(1, "Cannot create %s, all PFSs in use", path);
323 /* not reached */
324 } else if (pfs_id == HAMMER_ROOT_PFSID) {
325 errx(1, "Fatal error: PFS#%d must exist", HAMMER_ROOT_PFSID);
326 /* not reached */
327 }
328
329 /*
330 * Create the new PFS
331 */
332 printf("Creating PFS#%d\t", pfs_id);
333 clrpfs(&pfs, &pfsd, pfs_id);
334 init_pfsd(&pfsd, is_slave);
335
336 if (ioctl(fd, HAMMERIOC_SET_PSEUDOFS, &pfs) < 0) {
337 printf("failed: %s\n", strerror(errno));
338 } else {
339 /* special symlink, must be exactly 10 characters */
340 asprintf(&linkpath, "@@PFS%05d", pfs_id);
341 if (symlink(linkpath, path) < 0) {
342 printf("failed: cannot create symlink: %s\n",
343 strerror(errno));
344 } else {
345 printf("succeeded!\n");
346 hammer_cmd_pseudofs_update(av, ac);
347 }
348 }
349 free(tmpbuf);
350
351 close(fd);
352 }
353
354 void
hammer_cmd_pseudofs_destroy(char ** av,int ac)355 hammer_cmd_pseudofs_destroy(char **av, int ac)
356 {
357 struct hammer_ioc_pseudofs_rw pfs;
358 char *linkpath;
359 int fd;
360 int i;
361
362 if (ac == 0) {
363 pseudofs_usage(1);
364 /* not reached */
365 }
366 fd = getpfs(&pfs, av[0]);
367
368 if (pfs.pfs_id == HAMMER_ROOT_PFSID) {
369 errx(1, "You cannot destroy PFS#%d", HAMMER_ROOT_PFSID);
370 /* not reached */
371 }
372
373 printf("You have requested that PFS#%d (%s) be destroyed\n",
374 pfs.pfs_id, pfs.ondisk->label);
375 printf("This will irrevocably destroy all data on this PFS!!!!!\n");
376 printf("Do you really want to do this? [y/n] ");
377 fflush(stdout);
378 if (getyn() == 0) {
379 errx(1, "No action taken on PFS#%d", pfs.pfs_id);
380 /* not reached */
381 }
382
383 if (hammer_is_pfs_master(pfs.ondisk)) {
384 printf("This PFS is currently setup as a MASTER!\n");
385 printf("Are you absolutely sure you want to destroy it? [y/n] ");
386 fflush(stdout);
387 if (getyn() == 0) {
388 errx(1, "No action taken on PFS#%d", pfs.pfs_id);
389 /* not reached */
390 }
391 }
392
393 printf("Destroying PFS#%d (%s)", pfs.pfs_id, pfs.ondisk->label);
394 if (DebugOpt) {
395 printf("\n");
396 } else {
397 printf(" in");
398 for (i = 5; i; --i) {
399 printf(" %d", i);
400 fflush(stdout);
401 sleep(1);
402 }
403 printf(".. starting destruction pass\n");
404 }
405
406 /*
407 * Remove the softlink on success.
408 */
409 if (ioctl(fd, HAMMERIOC_RMR_PSEUDOFS, &pfs) == 0) {
410 printf("pfs-destroy of PFS#%d succeeded!\n", pfs.pfs_id);
411 linkpath = getlink(av[0]);
412 if (linkpath) {
413 if (remove(linkpath) < 0) {
414 err(1, "Unable to remove softlink %s", linkpath);
415 /* not reached */
416 }
417 free(linkpath);
418 }
419 } else {
420 printf("pfs-destroy of PFS#%d failed: %s\n",
421 pfs.pfs_id, strerror(errno));
422 }
423 relpfs(fd, &pfs);
424 }
425
426 void
hammer_cmd_pseudofs_upgrade(char ** av,int ac)427 hammer_cmd_pseudofs_upgrade(char **av, int ac)
428 {
429 struct hammer_ioc_pseudofs_rw pfs;
430 int fd;
431
432 if (ac == 0) {
433 pseudofs_usage(1);
434 /* not reached */
435 }
436 fd = getpfs(&pfs, av[0]);
437
438 if (pfs.pfs_id == HAMMER_ROOT_PFSID) {
439 errx(1, "You cannot upgrade PFS#%d"
440 " (It should already be a master)",
441 HAMMER_ROOT_PFSID);
442 /* not reached */
443 } else if (hammer_is_pfs_master(pfs.ondisk)) {
444 errx(1, "It is already a master");
445 /* not reached */
446 }
447
448 if (ioctl(fd, HAMMERIOC_UPG_PSEUDOFS, &pfs) == 0) {
449 printf("pfs-upgrade of PFS#%d (%s) succeeded\n",
450 pfs.pfs_id, pfs.ondisk->label);
451 } else {
452 err(1, "pfs-upgrade of PFS#%d (%s) failed",
453 pfs.pfs_id, pfs.ondisk->label);
454 /* not reached */
455 }
456 relpfs(fd, &pfs);
457 }
458
459 void
hammer_cmd_pseudofs_downgrade(char ** av,int ac)460 hammer_cmd_pseudofs_downgrade(char **av, int ac)
461 {
462 struct hammer_ioc_pseudofs_rw pfs;
463 int fd;
464
465 if (ac == 0) {
466 pseudofs_usage(1);
467 /* not reached */
468 }
469 fd = getpfs(&pfs, av[0]);
470
471 if (pfs.pfs_id == HAMMER_ROOT_PFSID) {
472 errx(1, "You cannot downgrade PFS#%d", HAMMER_ROOT_PFSID);
473 /* not reached */
474 } else if (hammer_is_pfs_slave(pfs.ondisk)) {
475 errx(1, "It is already a slave");
476 /* not reached */
477 }
478
479 if (ioctl(fd, HAMMERIOC_DGD_PSEUDOFS, &pfs) == 0) {
480 printf("pfs-downgrade of PFS#%d (%s) succeeded\n",
481 pfs.pfs_id, pfs.ondisk->label);
482 } else {
483 err(1, "pfs-downgrade of PFS#%d (%s) failed",
484 pfs.pfs_id, pfs.ondisk->label);
485 /* not reached */
486 }
487 relpfs(fd, &pfs);
488 }
489
490 void
hammer_cmd_pseudofs_update(char ** av,int ac)491 hammer_cmd_pseudofs_update(char **av, int ac)
492 {
493 struct hammer_ioc_pseudofs_rw pfs;
494 int fd;
495
496 if (ac == 0) {
497 pseudofs_usage(1);
498 /* not reached */
499 }
500 fd = getpfs(&pfs, av[0]);
501
502 printf("%s\n", av[0]);
503 fflush(stdout);
504
505 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) == 0) {
506 parse_pfsd_options(av + 1, ac - 1, pfs.ondisk);
507 if (hammer_is_pfs_slave(pfs.ondisk) &&
508 pfs.pfs_id == HAMMER_ROOT_PFSID) {
509 errx(1, "The real mount point cannot be made a PFS "
510 "slave, only PFS sub-directories can be made "
511 "slaves");
512 /* not reached */
513 }
514 pfs.bytes = sizeof(*pfs.ondisk);
515 if (ioctl(fd, HAMMERIOC_SET_PSEUDOFS, &pfs) == 0) {
516 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) == 0) {
517 dump_pfsd(pfs.ondisk, fd);
518 } else {
519 err(1, "Unable to retrieve PFS configuration "
520 "after successful update");
521 /* not reached */
522 }
523 } else {
524 err(1, "Unable to adjust PFS configuration");
525 /* not reached */
526 }
527 }
528 relpfs(fd, &pfs);
529 }
530
531 static
532 void
init_pfsd(hammer_pseudofs_data_t pfsd,int is_slave)533 init_pfsd(hammer_pseudofs_data_t pfsd, int is_slave)
534 {
535 bzero(pfsd, sizeof(*pfsd));
536 pfsd->sync_beg_tid = 1;
537 pfsd->sync_end_tid = 1;
538 pfsd->sync_beg_ts = 0;
539 pfsd->sync_end_ts = 0;
540 hammer_uuid_create(&pfsd->shared_uuid);
541 hammer_uuid_create(&pfsd->unique_uuid);
542 if (is_slave)
543 pfsd->mirror_flags |= HAMMER_PFSD_SLAVE;
544 }
545
546 void
dump_pfsd(hammer_pseudofs_data_t pfsd,int fd)547 dump_pfsd(hammer_pseudofs_data_t pfsd, int fd)
548 {
549 struct hammer_ioc_version version;
550 char *str = NULL;
551
552 printf(" sync-beg-tid=0x%016jx\n", (uintmax_t)pfsd->sync_beg_tid);
553 printf(" sync-end-tid=0x%016jx\n", (uintmax_t)pfsd->sync_end_tid);
554 hammer_uuid_to_string(&pfsd->shared_uuid, &str);
555 printf(" shared-uuid=%s\n", str);
556 free(str);
557 hammer_uuid_to_string(&pfsd->unique_uuid, &str);
558 printf(" unique-uuid=%s\n", str);
559 free(str);
560 printf(" label=\"%s\"\n", pfsd->label);
561 if (pfsd->snapshots[0])
562 printf(" snapshots=\"%s\"\n", pfsd->snapshots);
563 if (pfsd->prune_min < (60 * 60 * 24)) {
564 printf(" prune-min=%02d:%02d:%02d\n",
565 pfsd->prune_min / 60 / 60 % 24,
566 pfsd->prune_min / 60 % 60,
567 pfsd->prune_min % 60);
568 } else if (pfsd->prune_min % (60 * 60 * 24)) {
569 printf(" prune-min=%dd/%02d:%02d:%02d\n",
570 pfsd->prune_min / 60 / 60 / 24,
571 pfsd->prune_min / 60 / 60 % 24,
572 pfsd->prune_min / 60 % 60,
573 pfsd->prune_min % 60);
574 } else {
575 printf(" prune-min=%dd\n", pfsd->prune_min / 60 / 60 / 24);
576 }
577
578 if (hammer_is_pfs_slave(pfsd))
579 printf(" operating as a SLAVE\n");
580 else
581 printf(" operating as a MASTER\n");
582
583 /*
584 * Snapshots directory cannot be shown when there is no fd since
585 * hammer version can't be retrieved. mirror-dump passes -1 because
586 * its input came from mirror-read output thus no path is available
587 * to open(2).
588 */
589 if (fd >= 0 && pfsd->snapshots[0] == 0) {
590 bzero(&version, sizeof(version));
591 if (ioctl(fd, HAMMERIOC_GET_VERSION, &version) < 0)
592 return;
593 HammerVersion = version.cur_version;
594 if (version.cur_version < 3) {
595 if (hammer_is_pfs_slave(pfsd)) {
596 printf(" snapshots directory not set for "
597 "slave\n");
598 } else {
599 printf(" snapshots directory for master "
600 "defaults to <pfs>/snapshots\n");
601 }
602 } else {
603 printf(" snapshots directory defaults to "
604 "/var/hammer/<pfs>\n");
605 }
606 }
607 }
608
609 static
610 void
parse_pfsd_options(char ** av,int ac,hammer_pseudofs_data_t pfsd)611 parse_pfsd_options(char **av, int ac, hammer_pseudofs_data_t pfsd)
612 {
613 char *cmd;
614 char *ptr;
615 int len;
616
617 while (ac) {
618 cmd = *av;
619 if ((ptr = strchr(cmd, '=')) != NULL)
620 *ptr++ = 0;
621
622 /*
623 * Basic assignment value test
624 */
625 if (ptr == NULL) {
626 errx(1, "option %s requires an assignment", cmd);
627 /* not reached */
628 }
629
630 if (strcmp(cmd, "sync-beg-tid") == 0) {
631 pfsd->sync_beg_tid = strtoull(ptr, NULL, 16);
632 } else if (strcmp(cmd, "sync-end-tid") == 0) {
633 pfsd->sync_end_tid = strtoull(ptr, NULL, 16);
634 } else if (strcmp(cmd, "shared-uuid") == 0) {
635 if (hammer_uuid_from_string(ptr, &pfsd->shared_uuid)) {
636 errx(1, "option %s: error parsing uuid %s",
637 cmd, ptr);
638 /* not reached */
639 }
640 } else if (strcmp(cmd, "unique-uuid") == 0) {
641 if (hammer_uuid_from_string(ptr, &pfsd->unique_uuid)) {
642 errx(1, "option %s: error parsing uuid %s",
643 cmd, ptr);
644 /* not reached */
645 }
646 } else if (strcmp(cmd, "label") == 0) {
647 len = strlen(ptr);
648 if (ptr[0] == '"' && ptr[len-1] == '"') {
649 ptr[len-1] = 0;
650 ++ptr;
651 } else if (ptr[0] == '"') {
652 errx(1, "option %s: malformed string", cmd);
653 /* not reached */
654 }
655 snprintf(pfsd->label, sizeof(pfsd->label), "%s", ptr);
656 } else if (strcmp(cmd, "snapshots") == 0) {
657 len = strlen(ptr);
658 if (ptr[0] != '/') {
659 fprintf(stderr,
660 "option %s: '%s' must be an "
661 "absolute path\n", cmd, ptr);
662 if (ptr[0] == 0) {
663 fprintf(stderr,
664 "use 'snapshots-clear' "
665 "to unset snapshots dir\n");
666 }
667 exit(1);
668 }
669 if (len >= (int)sizeof(pfsd->snapshots)) {
670 errx(1, "option %s: path too long, %d "
671 "character limit", cmd, len);
672 /* not reached */
673 }
674 snprintf(pfsd->snapshots, sizeof(pfsd->snapshots),
675 "%s", ptr);
676 } else if (strcmp(cmd, "snapshots-clear") == 0) {
677 pfsd->snapshots[0] = 0;
678 } else if (strcmp(cmd, "prune-min") == 0) {
679 pfsd->prune_min = timetosecs(ptr);
680 if (pfsd->prune_min < 0) {
681 errx(1, "option %s: illegal time spec, "
682 "use Nd or [Nd/]hh[:mm[:ss]]", ptr);
683 /* not reached */
684 }
685 } else {
686 errx(1, "invalid option: %s", cmd);
687 /* not reached */
688 }
689 --ac;
690 ++av;
691 }
692 }
693
694 static
695 void
pseudofs_usage(int code)696 pseudofs_usage(int code)
697 {
698 fprintf(stderr,
699 "hammer pfs-status <dirpath> ...\n"
700 "hammer pfs-master <dirpath> [options]\n"
701 "hammer pfs-slave <dirpath> [options]\n"
702 "hammer pfs-update <dirpath> [options]\n"
703 "hammer pfs-upgrade <dirpath>\n"
704 "hammer pfs-downgrade <dirpath>\n"
705 "hammer pfs-destroy <dirpath>\n"
706 "\n"
707 "options:\n"
708 " sync-beg-tid=0x16llx\n"
709 " sync-end-tid=0x16llx\n"
710 " shared-uuid=0x16llx\n"
711 " unique-uuid=0x16llx\n"
712 " label=\"string\"\n"
713 " snapshots=\"/path\"\n"
714 " snapshots-clear\n"
715 " prune-min=Nd\n"
716 " prune-min=[Nd/]hh[:mm[:ss]]\n"
717 );
718 exit(code);
719 }
720
721 /*
722 * Convert time in the form [Nd/]hh[:mm[:ss]] to seconds.
723 *
724 * Return -1 if a parse error occurs.
725 * Return 0x7FFFFFFF if the time exceeds the maximum allowed.
726 */
727 static
728 int
timetosecs(char * str)729 timetosecs(char *str)
730 {
731 int days = 0;
732 int hrs = 0;
733 int mins = 0;
734 int secs = 0;
735 int n;
736 long long v;
737 char *ptr;
738
739 n = strtol(str, &ptr, 10);
740 if (n < 0)
741 return(-1);
742 if (*ptr == 'd') {
743 days = n;
744 ++ptr;
745 if (*ptr == '/')
746 n = strtol(ptr + 1, &ptr, 10);
747 else
748 n = 0;
749 }
750 if (n < 0)
751 return(-1);
752 hrs = n;
753 if (*ptr == ':') {
754 n = strtol(ptr + 1, &ptr, 10);
755 if (n < 0)
756 return(-1);
757 mins = n;
758 if (*ptr == ':') {
759 n = strtol(ptr + 1, &ptr, 10);
760 if (n < 0)
761 return(-1);
762 secs = n;
763 }
764 }
765 if (*ptr)
766 return(-1);
767 v = days * 24 * 60 * 60 + hrs * 60 * 60 + mins * 60 + secs;
768 if (v > 0x7FFFFFFF)
769 v = 0x7FFFFFFF;
770 return((int)v);
771 }
772