2 * Copyright (c) 2008 The DragonFly Project. All rights reserved.
4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
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
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.
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
34 * $DragonFly: src/sbin/hammer/cmd_pseudofs.c,v 1.9 2008/08/17 10:35:18 mneumann Exp $
39 static void parse_pfsd_options(char **av, int ac, hammer_pseudofs_data_t pfsd);
40 static void init_pfsd(hammer_pseudofs_data_t pfsd, int is_slave);
41 static void dump_pfsd(hammer_pseudofs_data_t pfsd);
42 static void pseudofs_usage(int code);
43 static int getyn(void);
46 * Calculate the pfs_id given a path to a directory or a @@PFS or @@%llx:%d
50 getpfs(struct hammer_ioc_pseudofs_rw *pfs, const char *path)
52 hammer_tid_t dummy_tid;
59 bzero(pfs, sizeof(*pfs));
60 pfs->ondisk = malloc(sizeof(*pfs->ondisk));
61 bzero(pfs->ondisk, sizeof(*pfs->ondisk));
62 pfs->bytes = sizeof(*pfs->ondisk);
65 * Calculate the directory containing the softlink
67 dirpath = strdup(path);
68 if (strrchr(dirpath, '/')) {
69 *strrchr(dirpath, '/') = 0;
70 if (strlen(dirpath) == 0) {
72 dirpath = strdup("/");
76 dirpath = strdup(".");
79 if (lstat(path, &st) == 0 && S_ISLNK(st.st_mode)) {
81 * Avoid foot-shooting. Don't let the user access a PFS
82 * softlink via a PFS. PFS softlinks may only be accessed
83 * via the master filesystem.
85 fd = open(dirpath, O_RDONLY);
89 ioctl(fd, HAMMERIOC_GET_PSEUDOFS, pfs);
90 if (pfs->pfs_id != 0) {
92 "You are attempting to access a PFS softlink "
93 "from a PFS. It may not represent the PFS\n"
94 "on the main filesystem mount that you "
95 "expect! You may only access PFS softlinks\n"
96 "via the main filesystem mount!\n");
102 * Extract the PFS from the link. HAMMER will automatically
103 * convert @@PFS%05d links so if actually see one in that
104 * form the target PFS may not exist or may be corrupt. But
105 * we can extract the PFS id anyway.
107 n = readlink(path, buf, sizeof(buf) - 1);
111 if (sscanf(buf, "@@PFS%d", &pfs->pfs_id) == 1) {
112 fd = open(dirpath, O_RDONLY);
115 if (sscanf(buf, "@@%llx:%d", &dummy_tid, &pfs->pfs_id) == 2) {
116 fd = open(dirpath, O_RDONLY);
122 * Try to open the path and request the pfs_id that way.
124 fd = open(path, O_RDONLY);
127 ioctl(fd, HAMMERIOC_GET_PSEUDOFS, pfs);
128 if (pfs->pfs_id == -1) {
139 fprintf(stderr, "Cannot access PFS %s: %s\n",
140 path, strerror(errno));
143 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, pfs) < 0) {
144 fprintf(stderr, "Cannot access PFS %s: %s\n",
145 path, strerror(errno));
153 relpfs(int fd, struct hammer_ioc_pseudofs_rw *pfs)
163 hammer_cmd_pseudofs_status(char **av, int ac)
165 struct hammer_ioc_pseudofs_rw pfs;
169 for (i = 0; i < ac; ++i) {
170 printf("%s\t", av[i]);
171 fd = getpfs(&pfs, av[i]);
172 if (fd < 0 || ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) < 0) {
173 printf("Not a HAMMER root\n");
175 printf("PFS #%d {\n", pfs.pfs_id);
176 dump_pfsd(pfs.ondisk);
187 hammer_cmd_pseudofs_create(char **av, int ac, int is_slave)
189 struct hammer_ioc_pseudofs_rw pfs;
190 struct hammer_pseudofs_data pfsd;
202 if (lstat(path, &st) == 0) {
203 fprintf(stderr, "cannot create %s, file exists!\n", path);
207 dirpath = strdup(path);
208 if (strrchr(dirpath, '/') != NULL) {
209 *strrchr(dirpath, '/') = 0;
212 dirpath = strdup(".");
214 fd = open(dirpath, O_RDONLY);
216 fprintf(stderr, "Cannot open directory %s\n", dirpath);
221 for (pfs_id = 0; pfs_id < HAMMER_MAX_PFS; ++pfs_id) {
222 bzero(&pfs, sizeof(pfs));
223 bzero(&pfsd, sizeof(pfsd));
226 pfs.bytes = sizeof(pfsd);
227 pfs.version = HAMMER_IOC_PSEUDOFS_VERSION;
228 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) < 0) {
233 if (pfs_id == HAMMER_MAX_PFS) {
234 fprintf(stderr, "Cannot create %s, all PFSs in use\n", path);
237 if (error != ENOENT) {
238 fprintf(stderr, "Cannot create %s, got %s during scan\n",
239 path, strerror(error));
246 printf("Creating PFS #%d\t", pfs_id);
247 bzero(&pfsd, sizeof(pfsd));
248 init_pfsd(&pfsd, is_slave);
251 pfs.bytes = sizeof(pfsd);
252 pfs.version = HAMMER_IOC_PSEUDOFS_VERSION;
254 if (ioctl(fd, HAMMERIOC_SET_PSEUDOFS, &pfs) < 0) {
255 printf("failed: %s\n", strerror(errno));
257 /* special symlink, must be exactly 10 characters */
258 asprintf(&linkpath, "@@PFS%05d", pfs_id);
259 if (symlink(linkpath, path) < 0) {
260 printf("failed: cannot create symlink: %s\n",
263 printf("succeeded!\n");
264 hammer_cmd_pseudofs_update(av, ac);
271 hammer_cmd_pseudofs_destroy(char **av, int ac)
273 struct hammer_ioc_pseudofs_rw pfs;
280 bzero(&pfs, sizeof(pfs));
281 fd = getpfs(&pfs, av[0]);
283 if (pfs.pfs_id == 0) {
284 fprintf(stderr, "You cannot destroy PFS#0\n");
287 printf("You have requested that PFS#%d (%s) be destroyed\n",
288 pfs.pfs_id, pfs.ondisk->label);
289 printf("This will irrevocably destroy all data on this PFS!!!!!\n");
290 printf("Do you really want to do this? ");
293 fprintf(stderr, "No action taken on PFS#%d\n", pfs.pfs_id);
297 if ((pfs.ondisk->mirror_flags & HAMMER_PFSD_SLAVE) == 0) {
298 printf("This PFS is currently setup as a MASTER!\n");
299 printf("Are you absolutely sure you want to destroy it? ");
302 fprintf(stderr, "No action taken on PFS#%d\n",
308 printf("Destroying PFS #%d (%s) in ", pfs.pfs_id, pfs.ondisk->label);
309 for (i = 5; i; --i) {
314 printf(".. starting destruction pass\n");
318 * Set the sync_beg_tid and sync_end_tid's to 1, once we start the
319 * RMR the PFS is basically destroyed even if someone ^C's it.
321 pfs.ondisk->mirror_flags |= HAMMER_PFSD_SLAVE;
322 pfs.ondisk->reserved01 = -1;
323 pfs.ondisk->sync_beg_tid = 1;
324 pfs.ondisk->sync_end_tid = 1;
326 if (ioctl(fd, HAMMERIOC_SET_PSEUDOFS, &pfs) < 0) {
327 fprintf(stderr, "Unable to update the PFS configuration: %s\n",
333 * Ok, do it. Remove the softlink on success.
335 if (ioctl(fd, HAMMERIOC_RMR_PSEUDOFS, &pfs) == 0) {
336 printf("pfs-destroy of PFS#%d succeeded!\n", pfs.pfs_id);
337 if (lstat(av[0], &st) == 0 && S_ISLNK(st.st_mode)) {
338 if (remove(av[0]) < 0) {
339 fprintf(stderr, "Unable to remove softlink: %s "
340 "(but the PFS has been destroyed)\n",
342 /* exit status 0 anyway */
346 printf("pfs-destroy of PFS#%d failed: %s\n",
347 pfs.pfs_id, strerror(errno));
352 hammer_cmd_pseudofs_upgrade(char **av, int ac)
354 struct hammer_ioc_pseudofs_rw pfs;
359 bzero(&pfs, sizeof(pfs));
360 fd = getpfs(&pfs, av[0]);
362 if (pfs.pfs_id == 0) {
363 fprintf(stderr, "You cannot upgrade PFS#0"
364 " (It should already be a master)\n");
367 if (ioctl(fd, HAMMERIOC_UPG_PSEUDOFS, &pfs) == 0) {
368 printf("pfs-upgrade of PFS#%d (%s) succeeded\n",
369 pfs.pfs_id, pfs.ondisk->label);
371 fprintf(stderr, "pfs-upgrade of PFS#%d (%s) failed: %s\n",
372 pfs.pfs_id, pfs.ondisk->label, strerror(errno));
377 hammer_cmd_pseudofs_downgrade(char **av, int ac)
379 struct hammer_ioc_pseudofs_rw pfs;
384 bzero(&pfs, sizeof(pfs));
385 fd = getpfs(&pfs, av[0]);
387 if (pfs.pfs_id == 0) {
388 fprintf(stderr, "You cannot downgrade PFS#0\n");
392 if (ioctl(fd, HAMMERIOC_DGD_PSEUDOFS, &pfs) == 0) {
393 printf("pfs-downgrade of PFS#%d (%s) succeeded\n",
394 pfs.pfs_id, pfs.ondisk->label);
396 fprintf(stderr, "pfs-upgrade of PFS#%d (%s) failed: %s\n",
397 pfs.pfs_id, pfs.ondisk->label, strerror(errno));
402 hammer_cmd_pseudofs_update(char **av, int ac)
404 struct hammer_ioc_pseudofs_rw pfs;
409 bzero(&pfs, sizeof(pfs));
410 fd = getpfs(&pfs, av[0]);
412 printf("%s\n", av[0]);
415 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) == 0) {
416 parse_pfsd_options(av + 1, ac - 1, pfs.ondisk);
417 if ((pfs.ondisk->mirror_flags & HAMMER_PFSD_SLAVE) &&
419 printf("The real mount point cannot be made a PFS "
420 "slave, only PFS sub-directories can be made "
424 pfs.bytes = sizeof(*pfs.ondisk);
425 if (ioctl(fd, HAMMERIOC_SET_PSEUDOFS, &pfs) == 0) {
426 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) == 0) {
427 dump_pfsd(pfs.ondisk);
429 printf("Unable to retrieve pfs configuration after successful update: %s\n", strerror(errno));
433 printf("Unable to adjust pfs configuration: %s\n", strerror(errno));
440 init_pfsd(hammer_pseudofs_data_t pfsd, int is_slave)
444 pfsd->sync_beg_tid = 1;
445 pfsd->sync_end_tid = 1;
446 pfsd->sync_beg_ts = 0;
447 pfsd->sync_end_ts = 0;
448 uuid_create(&pfsd->shared_uuid, &status);
449 uuid_create(&pfsd->unique_uuid, &status);
451 pfsd->mirror_flags |= HAMMER_PFSD_SLAVE;
456 dump_pfsd(hammer_pseudofs_data_t pfsd)
461 printf(" sync-beg-tid=0x%016llx\n", pfsd->sync_beg_tid);
462 printf(" sync-end-tid=0x%016llx\n", pfsd->sync_end_tid);
463 uuid_to_string(&pfsd->shared_uuid, &str, &status);
464 printf(" shared-uuid=%s\n", str);
465 uuid_to_string(&pfsd->unique_uuid, &str, &status);
466 printf(" unique-uuid=%s\n", str);
467 if (pfsd->mirror_flags & HAMMER_PFSD_SLAVE) {
470 printf(" label=\"%s\"\n", pfsd->label);
471 if (pfsd->mirror_flags & HAMMER_PFSD_SLAVE)
472 printf(" operating as a SLAVE\n");
474 printf(" operating as a MASTER\n");
478 parse_pfsd_options(char **av, int ac, hammer_pseudofs_data_t pfsd)
487 if ((ptr = strchr(cmd, '=')) != NULL)
491 * Basic assignment value test
495 "option %s requires an assignment\n",
501 if (strcmp(cmd, "sync-beg-tid") == 0) {
502 pfsd->sync_beg_tid = strtoull(ptr, NULL, 16);
503 } else if (strcmp(cmd, "sync-end-tid") == 0) {
504 pfsd->sync_end_tid = strtoull(ptr, NULL, 16);
505 } else if (strcmp(cmd, "shared-uuid") == 0) {
506 uuid_from_string(ptr, &pfsd->shared_uuid, &status);
507 } else if (strcmp(cmd, "unique-uuid") == 0) {
508 uuid_from_string(ptr, &pfsd->unique_uuid, &status);
509 } else if (strcmp(cmd, "label") == 0) {
511 if (ptr[0] == '"' && ptr[len-1] == '"') {
514 } else if (ptr[0] == '"') {
516 "option %s: malformed string\n",
520 snprintf(pfsd->label, sizeof(pfsd->label), "%s", ptr);
522 fprintf(stderr, "invalid option: %s\n", cmd);
525 if (status != uuid_s_ok) {
526 fprintf(stderr, "option %s: error parsing uuid %s\n",
537 pseudofs_usage(int code)
540 "hammer pfs-status <dirpath1>...<dirpathN>\n"
541 "hammer pfs-master <dirpath> [options]\n"
542 "hammer pfs-slave <dirpath> [options]\n"
543 "hammer pfs-update <dirpath> [options]\n"
544 "hammer pfs-upgrade <dirpath>\n"
545 "hammer pfs-downgrade <dirpath>\n"
546 "hammer pfs-destroy <dirpath>\n"
549 " sync-beg-tid=0x16llx\n"
550 " sync-end-tid=0x16llx\n"
551 " shared-uuid=0x16llx\n"
552 " unique-uuid=0x16llx\n"
553 " label=\"string\"\n"
565 if (fgets(buf, sizeof(buf), stdin) == NULL)
568 while (len && (buf[len-1] == '\n' || buf[len-1] == '\r'))
571 if (strcmp(buf, "y") == 0 ||
572 strcmp(buf, "yes") == 0 ||
573 strcmp(buf, "Y") == 0 ||
574 strcmp(buf, "YES") == 0) {