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 1.6.2.2 2008/08/04 19:41:25 dillon 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;
72 dirpath
= strdup(".");
75 if (lstat(path
, &st
) == 0 && S_ISLNK(st
.st_mode
)) {
77 * Avoid foot-shooting. Don't let the user access a PFS
78 * softlink via a PFS. PFS softlinks may only be accessed
79 * via the master filesystem.
81 fd
= open(dirpath
, O_RDONLY
);
85 ioctl(fd
, HAMMERIOC_GET_PSEUDOFS
, pfs
);
86 if (pfs
->pfs_id
!= 0) {
88 "You are attempting to access a PFS softlink "
89 "from a PFS. It may not represent the PFS\n"
90 "on the main filesystem mount that you "
91 "expect! You may only access PFS softlinks\n"
92 "via the main filesystem mount!\n");
98 * Extract the PFS from the link. HAMMER will automatically
99 * convert @@PFS%05d links so if actually see one in that
100 * form the target PFS may not exist or may be corrupt. But
101 * we can extract the PFS id anyway.
103 n
= readlink(path
, buf
, sizeof(buf
) - 1);
107 if (sscanf(buf
, "@@PFS%d", &pfs
->pfs_id
) == 1) {
108 fd
= open(dirpath
, O_RDONLY
);
111 if (sscanf(buf
, "@@%llx:%d", &dummy_tid
, &pfs
->pfs_id
) == 2) {
112 fd
= open(dirpath
, O_RDONLY
);
118 * Try to open the path and request the pfs_id that way.
120 fd
= open(path
, O_RDONLY
);
123 ioctl(fd
, HAMMERIOC_GET_PSEUDOFS
, pfs
);
124 if (pfs
->pfs_id
== -1) {
135 fprintf(stderr
, "Cannot access PFS %s: %s\n",
136 path
, strerror(errno
));
139 if (ioctl(fd
, HAMMERIOC_GET_PSEUDOFS
, pfs
) < 0) {
140 fprintf(stderr
, "Cannot access PFS %s: %s\n",
141 path
, strerror(errno
));
149 relpfs(int fd
, struct hammer_ioc_pseudofs_rw
*pfs
)
159 hammer_cmd_pseudofs_status(char **av
, int ac
)
161 struct hammer_ioc_pseudofs_rw pfs
;
165 for (i
= 0; i
< ac
; ++i
) {
166 printf("%s\t", av
[i
]);
167 fd
= getpfs(&pfs
, av
[i
]);
168 if (fd
< 0 || ioctl(fd
, HAMMERIOC_GET_PSEUDOFS
, &pfs
) < 0) {
169 printf("Not a HAMMER root\n");
171 printf("PFS #%d {\n", pfs
.pfs_id
);
172 dump_pfsd(pfs
.ondisk
);
183 hammer_cmd_pseudofs_create(char **av
, int ac
, int is_slave
)
185 struct hammer_ioc_pseudofs_rw pfs
;
186 struct hammer_pseudofs_data pfsd
;
198 if (lstat(path
, &st
) == 0) {
199 fprintf(stderr
, "cannot create %s, file exists!\n", path
);
203 dirpath
= strdup(path
);
204 if (strrchr(dirpath
, '/') != NULL
) {
205 *strrchr(dirpath
, '/') = 0;
208 dirpath
= strdup(".");
210 fd
= open(dirpath
, O_RDONLY
);
212 fprintf(stderr
, "Cannot open directory %s\n", dirpath
);
217 for (pfs_id
= 0; pfs_id
< HAMMER_MAX_PFS
; ++pfs_id
) {
218 bzero(&pfs
, sizeof(pfs
));
219 bzero(&pfsd
, sizeof(pfsd
));
222 pfs
.bytes
= sizeof(pfsd
);
223 pfs
.version
= HAMMER_IOC_PSEUDOFS_VERSION
;
224 if (ioctl(fd
, HAMMERIOC_GET_PSEUDOFS
, &pfs
) < 0) {
229 if (pfs_id
== HAMMER_MAX_PFS
) {
230 fprintf(stderr
, "Cannot create %s, all PFSs in use\n", path
);
233 if (error
!= ENOENT
) {
234 fprintf(stderr
, "Cannot create %s, got %s during scan\n",
235 path
, strerror(error
));
242 printf("Creating PFS #%d\t", pfs_id
);
243 bzero(&pfsd
, sizeof(pfsd
));
244 init_pfsd(&pfsd
, is_slave
);
247 pfs
.bytes
= sizeof(pfsd
);
248 pfs
.version
= HAMMER_IOC_PSEUDOFS_VERSION
;
250 if (ioctl(fd
, HAMMERIOC_SET_PSEUDOFS
, &pfs
) < 0) {
251 printf("failed: %s\n", strerror(errno
));
253 /* special symlink, must be exactly 10 characters */
254 asprintf(&linkpath
, "@@PFS%05d", pfs_id
);
255 if (symlink(linkpath
, path
) < 0) {
256 printf("failed: cannot create symlink: %s\n",
259 printf("succeeded!\n");
260 hammer_cmd_pseudofs_update(av
, ac
);
267 hammer_cmd_pseudofs_destroy(char **av
, int ac
)
269 struct hammer_ioc_pseudofs_rw pfs
;
276 bzero(&pfs
, sizeof(pfs
));
277 fd
= getpfs(&pfs
, av
[0]);
279 if (pfs
.pfs_id
== 0) {
280 fprintf(stderr
, "You cannot destroy PFS#0\n");
283 printf("You have requested that PFS#%d (%s) be destroyed\n",
284 pfs
.pfs_id
, pfs
.ondisk
->label
);
285 printf("This will irrevocably destroy all data on this PFS!!!!!\n");
286 printf("Do you really want to do this? ");
289 fprintf(stderr
, "No action taken on PFS#%d\n", pfs
.pfs_id
);
293 if ((pfs
.ondisk
->mirror_flags
& HAMMER_PFSD_SLAVE
) == 0) {
294 printf("This PFS is currently setup as a MASTER!\n");
295 printf("Are you absolutely sure you want to destroy it? ");
298 fprintf(stderr
, "No action taken on PFS#%d\n",
304 printf("Destroying PFS #%d (%s) in ", pfs
.pfs_id
, pfs
.ondisk
->label
);
305 for (i
= 5; i
; --i
) {
310 printf(".. starting destruction pass\n");
314 * Set the sync_beg_tid and sync_end_tid's to 1, once we start the
315 * RMR the PFS is basically destroyed even if someone ^C's it.
317 pfs
.ondisk
->mirror_flags
|= HAMMER_PFSD_SLAVE
;
318 pfs
.ondisk
->reserved01
= -1;
319 pfs
.ondisk
->sync_beg_tid
= 1;
320 pfs
.ondisk
->sync_end_tid
= 1;
322 if (ioctl(fd
, HAMMERIOC_SET_PSEUDOFS
, &pfs
) < 0) {
323 fprintf(stderr
, "Unable to update the PFS configuration: %s\n",
329 * Ok, do it. Remove the softlink on success.
331 if (ioctl(fd
, HAMMERIOC_RMR_PSEUDOFS
, &pfs
) == 0) {
332 printf("pfs-destroy of PFS#%d succeeded!\n", pfs
.pfs_id
);
333 if (lstat(av
[0], &st
) == 0 && S_ISLNK(st
.st_mode
)) {
334 if (remove(av
[0]) < 0) {
335 fprintf(stderr
, "Unable to remove softlink: %s "
336 "(but the PFS has been destroyed)\n",
338 /* exit status 0 anyway */
342 printf("pfs-destroy of PFS#%d failed: %s\n",
343 pfs
.pfs_id
, strerror(errno
));
348 hammer_cmd_pseudofs_upgrade(char **av
, int ac
)
350 struct hammer_ioc_pseudofs_rw pfs
;
355 bzero(&pfs
, sizeof(pfs
));
356 fd
= getpfs(&pfs
, av
[0]);
358 if (pfs
.pfs_id
== 0) {
359 fprintf(stderr
, "You cannot upgrade PFS#0"
360 " (It should already be a master)\n");
363 if (ioctl(fd
, HAMMERIOC_UPG_PSEUDOFS
, &pfs
) == 0) {
364 printf("pfs-upgrade of PFS#%d (%s) succeeded\n",
365 pfs
.pfs_id
, pfs
.ondisk
->label
);
367 fprintf(stderr
, "pfs-upgrade of PFS#%d (%s) failed: %s\n",
368 pfs
.pfs_id
, pfs
.ondisk
->label
, strerror(errno
));
373 hammer_cmd_pseudofs_downgrade(char **av
, int ac
)
375 struct hammer_ioc_pseudofs_rw pfs
;
380 bzero(&pfs
, sizeof(pfs
));
381 fd
= getpfs(&pfs
, av
[0]);
383 if (pfs
.pfs_id
== 0) {
384 fprintf(stderr
, "You cannot downgrade PFS#0\n");
388 if (ioctl(fd
, HAMMERIOC_DGD_PSEUDOFS
, &pfs
) == 0) {
389 printf("pfs-downgrade of PFS#%d (%s) succeeded\n",
390 pfs
.pfs_id
, pfs
.ondisk
->label
);
392 fprintf(stderr
, "pfs-upgrade of PFS#%d (%s) failed: %s\n",
393 pfs
.pfs_id
, pfs
.ondisk
->label
, strerror(errno
));
398 hammer_cmd_pseudofs_update(char **av
, int ac
)
400 struct hammer_ioc_pseudofs_rw pfs
;
405 bzero(&pfs
, sizeof(pfs
));
406 fd
= getpfs(&pfs
, av
[0]);
408 printf("%s\n", av
[0]);
411 if (ioctl(fd
, HAMMERIOC_GET_PSEUDOFS
, &pfs
) == 0) {
412 parse_pfsd_options(av
+ 1, ac
- 1, pfs
.ondisk
);
413 if ((pfs
.ondisk
->mirror_flags
& HAMMER_PFSD_SLAVE
) &&
415 printf("The real mount point cannot be made a PFS "
416 "slave, only PFS sub-directories can be made "
420 pfs
.bytes
= sizeof(*pfs
.ondisk
);
421 if (ioctl(fd
, HAMMERIOC_SET_PSEUDOFS
, &pfs
) == 0) {
422 if (ioctl(fd
, HAMMERIOC_GET_PSEUDOFS
, &pfs
) == 0) {
423 dump_pfsd(pfs
.ondisk
);
425 printf("Unable to retrieve pfs configuration after successful update: %s\n", strerror(errno
));
429 printf("Unable to adjust pfs configuration: %s\n", strerror(errno
));
436 init_pfsd(hammer_pseudofs_data_t pfsd
, int is_slave
)
440 pfsd
->sync_beg_tid
= 1;
441 pfsd
->sync_end_tid
= 1;
442 pfsd
->sync_beg_ts
= 0;
443 pfsd
->sync_end_ts
= 0;
444 uuid_create(&pfsd
->shared_uuid
, &status
);
445 uuid_create(&pfsd
->unique_uuid
, &status
);
447 pfsd
->mirror_flags
|= HAMMER_PFSD_SLAVE
;
452 dump_pfsd(hammer_pseudofs_data_t pfsd
)
457 printf(" sync-beg-tid=0x%016llx\n", pfsd
->sync_beg_tid
);
458 printf(" sync-end-tid=0x%016llx\n", pfsd
->sync_end_tid
);
459 uuid_to_string(&pfsd
->shared_uuid
, &str
, &status
);
460 printf(" shared-uuid=%s\n", str
);
461 uuid_to_string(&pfsd
->unique_uuid
, &str
, &status
);
462 printf(" unique-uuid=%s\n", str
);
463 if (pfsd
->mirror_flags
& HAMMER_PFSD_SLAVE
) {
466 printf(" label=\"%s\"\n", pfsd
->label
);
467 if (pfsd
->mirror_flags
& HAMMER_PFSD_SLAVE
)
468 printf(" operating as a SLAVE\n");
470 printf(" operating as a MASTER\n");
474 parse_pfsd_options(char **av
, int ac
, hammer_pseudofs_data_t pfsd
)
483 if ((ptr
= strchr(cmd
, '=')) != NULL
)
487 * Basic assignment value test
491 "option %s requires an assignment\n",
497 if (strcmp(cmd
, "sync-beg-tid") == 0) {
498 pfsd
->sync_beg_tid
= strtoull(ptr
, NULL
, 16);
499 } else if (strcmp(cmd
, "sync-end-tid") == 0) {
500 pfsd
->sync_end_tid
= strtoull(ptr
, NULL
, 16);
501 } else if (strcmp(cmd
, "shared-uuid") == 0) {
502 uuid_from_string(ptr
, &pfsd
->shared_uuid
, &status
);
503 } else if (strcmp(cmd
, "unique-uuid") == 0) {
504 uuid_from_string(ptr
, &pfsd
->unique_uuid
, &status
);
505 } else if (strcmp(cmd
, "label") == 0) {
507 if (ptr
[0] == '"' && ptr
[len
-1] == '"') {
510 } else if (ptr
[0] == '"') {
512 "option %s: malformed string\n",
516 snprintf(pfsd
->label
, sizeof(pfsd
->label
), "%s", ptr
);
518 fprintf(stderr
, "invalid option: %s\n", cmd
);
521 if (status
!= uuid_s_ok
) {
522 fprintf(stderr
, "option %s: error parsing uuid %s\n",
533 pseudofs_usage(int code
)
536 "hammer pfs-status <dirpath1>...<dirpathN>\n"
537 "hammer pfs-master <dirpath> [options]\n"
538 "hammer pfs-slave <dirpath> [options]\n"
539 "hammer pfs-update <dirpath> [options]\n"
540 "hammer pfs-upgrade <dirpath>\n"
541 "hammer pfs-downgrade <dirpath>\n"
542 "hammer pfs-destroy <dirpath>\n"
545 " sync-beg-tid=0x16llx\n"
546 " sync-end-tid=0x16llx\n"
547 " shared-uuid=0x16llx\n"
548 " unique-uuid=0x16llx\n"
549 " label=\"string\"\n"
561 if (fgets(buf
, sizeof(buf
), stdin
) == NULL
)
564 while (len
&& (buf
[len
-1] == '\n' || buf
[len
-1] == '\r'))
567 if (strcmp(buf
, "y") == 0 ||
568 strcmp(buf
, "yes") == 0 ||
569 strcmp(buf
, "Y") == 0 ||
570 strcmp(buf
, "YES") == 0) {