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
35 * Clean up specific HAMMER filesystems or all HAMMER filesystems.
37 * If no filesystems are specified any HAMMER- or null-mounted hammer PFS's
40 * Each HAMMER filesystem may contain a configuration file. If no
41 * configuration file is present one will be created with the following
44 * snapshots 1d 60d (0d 0d for /tmp, /var/tmp, /usr/obj)
47 * #dedup 1d 5m (not enabled by default)
51 * All hammer commands create and maintain cycle files in the snapshots
54 * For HAMMER version 2- the configuration file is a named 'config' in
55 * the snapshots directory, which defaults to <pfs>/snapshots.
56 * For HAMMER version 3+ the configuration file is saved in filesystem
57 * meta-data. The snapshots directory defaults to /var/hammer/<pfs>
58 * (/var/hammer/root for root mount).
70 static void do_cleanup(const char *path);
71 static void config_init(const char *path, struct hammer_ioc_config *config);
72 static void migrate_config(FILE *fp, struct hammer_ioc_config *config);
73 static void migrate_snapshots(int fd, const char *snapshots_path);
74 static void migrate_one_snapshot(int fd, const char *fpath,
75 struct hammer_ioc_snapshot *snapshot);
76 static int strtosecs(char *ptr);
77 static const char *dividing_slash(const char *path);
78 static int check_period(const char *snapshots_path, const char *cmd, int arg1,
80 static void save_period(const char *snapshots_path, const char *cmd,
82 static int check_softlinks(int fd, int new_config, const char *snapshots_path);
83 static void cleanup_softlinks(int fd, int new_config,
84 const char *snapshots_path, int arg2, char *arg3);
85 static void delete_snapshots(int fd, struct hammer_ioc_snapshot *dsnapshot);
86 static int check_expired(const char *fpath, int arg2);
88 static int create_snapshot(const char *path, const char *snapshots_path);
89 static int cleanup_rebalance(const char *path, const char *snapshots_path,
91 static int cleanup_prune(const char *path, const char *snapshots_path,
92 int arg1, int arg2, int snapshots_disabled);
93 static int cleanup_reblock(const char *path, const char *snapshots_path,
95 static int cleanup_recopy(const char *path, const char *snapshots_path,
97 static int cleanup_dedup(const char *path, const char *snapshots_path,
100 static void runcmd(int *resp, const char *ctl, ...) __printflike(2, 3);
104 struct didpfs *FirstPFS;
107 hammer_cmd_cleanup(char **av, int ac)
109 char *fstype, *fs, *path;
110 struct statfs *stfsbuf;
115 mntsize = getmntinfo(&stfsbuf, MNT_NOWAIT);
117 for (i=0; i < mntsize; i++) {
119 * We will cleanup in the case fstype is hammer.
120 * If we have null-mounted PFS, we check the
121 * mount source. If it looks like a PFS, we
122 * proceed to cleanup also.
124 fstype = stfsbuf[i].f_fstypename;
125 fs = stfsbuf[i].f_mntfromname;
126 if ((strcmp(fstype, "hammer") == 0) ||
127 ((strcmp(fstype, "null") == 0) &&
128 (strstr(fs, "/@@0x") != NULL ||
129 strstr(fs, "/@@-1") != NULL))) {
130 path = stfsbuf[i].f_mntonname;
146 do_cleanup(const char *path)
148 struct hammer_ioc_pseudofs_rw pfs;
149 struct hammer_ioc_config config;
150 struct hammer_ioc_version version;
151 union hammer_ioc_mrecord_any mrec_tmp;
152 char *snapshots_path = NULL;
165 struct didpfs *didpfs;
166 int snapshots_disabled = 0;
167 int prune_warning = 0;
169 int snapshots_from_pfs = 0;
174 bzero(&mrec_tmp, sizeof(mrec_tmp));
175 clrpfs(&pfs, &mrec_tmp.pfs.pfsd, -1);
177 printf("cleanup %-20s -", path);
178 fd = open(path, O_RDONLY);
180 printf(" unable to access directory: %s\n", strerror(errno));
183 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) < 0) {
184 printf(" not a HAMMER filesystem: %s\n", strerror(errno));
188 if (pfs.version != HAMMER_IOC_PSEUDOFS_VERSION) {
189 printf(" unrecognized HAMMER version\n");
193 bzero(&version, sizeof(version));
194 if (ioctl(fd, HAMMERIOC_GET_VERSION, &version) < 0) {
195 printf(" HAMMER filesystem but couldn't retrieve version!\n");
199 HammerVersion = version.cur_version;
201 bzero(&config, sizeof(config));
202 if (version.cur_version >= 3) {
203 if (ioctl(fd, HAMMERIOC_GET_CONFIG, &config) == 0 &&
204 config.head.error == 0) {
210 * Make sure we have not already handled this PFS. Several nullfs
211 * mounts might alias the same PFS.
213 for (didpfs = FirstPFS; didpfs; didpfs = didpfs->next) {
214 if (hammer_uuid_compare(&didpfs->uuid,
215 &mrec_tmp.pfs.pfsd.unique_uuid) == 0) {
216 printf(" PFS#%d already handled\n", pfs.pfs_id);
221 didpfs = malloc(sizeof(*didpfs));
222 didpfs->next = FirstPFS;
224 didpfs->uuid = mrec_tmp.pfs.pfsd.unique_uuid;
227 * Calculate the old snapshots directory for HAMMER VERSION < 3
229 * If the directory is explicitly specified in the PFS config
230 * we flag it and will not migrate it later.
232 if (mrec_tmp.pfs.pfsd.snapshots[0] == '/') {
233 asprintf(&snapshots_path, "%s", mrec_tmp.pfs.pfsd.snapshots);
234 snapshots_from_pfs = 1;
235 } else if (mrec_tmp.pfs.pfsd.snapshots[0]) {
236 printf(" WARNING: pfs-slave's snapshots dir is not absolute\n");
239 } else if (hammer_is_pfs_slave(&mrec_tmp.pfs.pfsd)) {
240 if (version.cur_version < 3) {
241 printf(" WARNING: must configure snapshot dir for PFS slave\n");
242 printf("\tWe suggest <fs>/var/slaves/<name> where "
243 "<fs> is the base HAMMER fs\n");
244 printf("\tcontaining the slave\n");
249 asprintf(&snapshots_path,
250 "%s%ssnapshots", path, dividing_slash(path));
254 * Check for old-style config file
256 if (snapshots_path) {
257 asprintf(&config_path, "%s/config", snapshots_path);
258 fp = fopen(config_path, "r");
262 * Handle upgrades to hammer version 3, move the config
263 * file into meta-data.
265 * For the old config read the file into the config structure,
266 * we will parse it out of the config structure regardless.
268 if (version.cur_version >= 3) {
270 printf("(migrating) ");
272 migrate_config(fp, &config);
273 migrate_snapshots(fd, snapshots_path);
275 if (ioctl(fd, HAMMERIOC_SET_CONFIG, &config) < 0) {
276 printf(" cannot init meta-data config!\n");
281 } else if (new_config == 0) {
282 config_init(path, &config);
283 if (ioctl(fd, HAMMERIOC_SET_CONFIG, &config) < 0) {
284 printf(" cannot init meta-data config!\n");
292 * Create missing snapshots directory for HAMMER VERSION < 3
294 if (stat(snapshots_path, &st) < 0) {
295 if (mkdir(snapshots_path, 0755) != 0) {
296 free(snapshots_path);
297 printf(" unable to create snapshot dir \"%s\": %s\n",
298 snapshots_path, strerror(errno));
305 * Create missing config file for HAMMER VERSION < 3
308 config_init(path, &config);
309 fp = fopen(config_path, "w");
311 fwrite(config.config.text, 1,
312 strlen(config.config.text), fp);
316 migrate_config(fp, &config);
322 * If snapshots_from_pfs is not set we calculate the new snapshots
323 * directory default (in /var) for HAMMER VERSION >= 3 and migrate
324 * the old snapshots directory over.
326 * People who have set an explicit snapshots directory will have
327 * to migrate the data manually into /var/hammer, or not bother at
328 * all. People running slaves may wish to migrate it and then
329 * clear the snapshots specification in the PFS config for the
332 if (new_config && snapshots_from_pfs == 0) {
335 if (path[0] != '/') {
336 printf(" path must start with '/'\n");
339 if (strcmp(path, "/") == 0)
340 asprintf(&npath, "%s/root", SNAPSHOTS_BASE);
342 asprintf(&npath, "%s/%s", SNAPSHOTS_BASE, path + 1);
343 if (snapshots_path) {
344 if (stat(npath, &st) < 0 && errno == ENOENT) {
345 if (stat(snapshots_path, &st) < 0 && errno == ENOENT) {
346 printf(" HAMMER UPGRADE: Creating snapshots\n"
347 "\tCreating snapshots in %s\n",
349 runcmd(&r, "mkdir -p %s", npath);
351 printf(" HAMMER UPGRADE: Moving snapshots\n"
352 "\tMoving snapshots from %s to %s\n",
353 snapshots_path, npath);
354 runcmd(&r, "mkdir -p %s", npath);
355 runcmd(&r, "cpdup %s %s", snapshots_path, npath);
357 printf("Unable to move snapshots directory!\n");
358 printf("Please fix this critical error.\n");
359 printf("Aborting cleanup of %s\n", path);
363 runcmd(&r, "rm -rf %s", snapshots_path);
366 free(snapshots_path);
367 } else if (stat(npath, &st) < 0 && errno == ENOENT) {
368 runcmd(&r, "mkdir -p %s", npath);
370 snapshots_path = npath;
374 * Lock the PFS. fd is the base directory of the mounted PFS.
376 if (flock(fd, LOCK_EX|LOCK_NB) == -1) {
377 if (errno == EWOULDBLOCK)
378 printf(" PFS#%d locked by other process\n", pfs.pfs_id);
380 printf(" can not lock %s: %s\n", config_path, strerror(errno));
385 printf(" handle PFS#%d using %s\n", pfs.pfs_id, snapshots_path);
387 struct pidfh *pfh = NULL;
388 static char pidfile[PIDFILE_BUFSIZE];
390 snprintf (pidfile, PIDFILE_BUFSIZE, "%s/hammer.cleanup.%d",
391 pidfile_loc, getpid());
392 pfh = pidfile_open(pidfile, 0644, NULL);
394 warn ("Unable to open or create %s", pidfile);
398 * Process the config file
400 cbase = config.config.text;
402 while ((cptr = strchr(cbase, '\n')) != NULL) {
403 bcopy(cbase, buf, cptr - cbase);
404 buf[cptr - cbase] = 0;
407 cmd = strtok(buf, WS);
408 if (cmd == NULL || cmd[0] == '#')
414 if ((ptr = strtok(NULL, WS)) != NULL) {
415 arg1 = strtosecs(ptr);
416 if ((ptr = strtok(NULL, WS)) != NULL) {
417 arg2 = strtosecs(ptr);
418 arg3 = strtok(NULL, WS);
422 printf("%20s - ", cmd);
426 if (strcmp(cmd, "snapshots") == 0) {
429 check_softlinks(fd, new_config,
431 printf("only removing old snapshots\n");
433 cleanup_softlinks(fd, new_config,
437 printf("disabled\n");
438 snapshots_disabled = 1;
441 if (check_period(snapshots_path, cmd, arg1, &savet)) {
443 cleanup_softlinks(fd, new_config,
446 r = create_snapshot(path, snapshots_path);
450 } else if (arg1 == 0) {
452 * The commands following this check can't handle
453 * a period of 0, so call the feature disabled and
454 * ignore the directive.
456 printf("disabled\n");
457 } else if (strcmp(cmd, "prune") == 0) {
458 if (check_period(snapshots_path, cmd, arg1, &savet)) {
460 printf("run - WARNING snapshot "
462 "but snapshots disabled\n");
466 r = cleanup_prune(path, snapshots_path,
467 arg1, arg2, snapshots_disabled);
471 } else if (strcmp(cmd, "rebalance") == 0) {
473 if (check_period(snapshots_path, cmd, arg1, &savet)) {
478 r = cleanup_rebalance(path, snapshots_path,
483 } else if (strcmp(cmd, "reblock") == 0) {
484 if (check_period(snapshots_path, cmd, arg1, &savet)) {
489 r = cleanup_reblock(path, snapshots_path,
494 } else if (strcmp(cmd, "recopy") == 0) {
495 if (check_period(snapshots_path, cmd, arg1, &savet)) {
500 r = cleanup_recopy(path, snapshots_path,
505 } else if (strcmp(cmd, "dedup") == 0) {
506 if (check_period(snapshots_path, cmd, arg1, &savet)) {
511 r = cleanup_dedup(path, snapshots_path,
517 printf("unknown directive\n");
521 save_period(snapshots_path, cmd, savet);
525 * Add new rebalance feature if the config doesn't have it.
526 * (old style config only).
528 if (new_config == 0 && found_rebal == 0) {
529 if ((fp = fopen(config_path, "r+")) != NULL) {
531 fprintf(fp, "rebalance 1d 5m\n");
537 * Cleanup, and delay a little
539 * NOTE: pidfile_remove() closes, removes, and frees the pfh.
540 * pidfile_close() closes and frees.
548 * Initialize new config data (new or old style)
552 config_init(const char *path, struct hammer_ioc_config *config)
554 const char *snapshots;
556 if (strcmp(path, "/tmp") == 0 ||
557 strcmp(path, "/var/tmp") == 0 ||
558 strcmp(path, "/usr/obj") == 0) {
559 snapshots = "snapshots 0d 0d\n";
561 snapshots = "snapshots 1d 60d\n";
563 bzero(config->config.text, sizeof(config->config.text));
564 snprintf(config->config.text, sizeof(config->config.text) - 1, "%s%s",
574 * Migrate configuration data from the old snapshots/config
575 * file to the new meta-data format.
579 migrate_config(FILE *fp, struct hammer_ioc_config *config)
583 n = fread(config->config.text, 1, sizeof(config->config.text) - 1, fp);
585 bzero(config->config.text + n, sizeof(config->config.text) - n);
589 * Migrate snapshot softlinks in the snapshots directory to the
590 * new meta-data format. The softlinks are left intact, but
591 * this way the pruning code won't lose track of them if you
592 * happen to blow away the snapshots directory.
596 migrate_snapshots(int fd, const char *snapshots_path)
598 struct hammer_ioc_snapshot snapshot;
604 bzero(&snapshot, sizeof(snapshot));
606 if ((dir = opendir(snapshots_path)) != NULL) {
607 while ((den = readdir(dir)) != NULL) {
608 if (den->d_name[0] == '.')
610 asprintf(&fpath, "%s/%s", snapshots_path, den->d_name);
611 if (lstat(fpath, &st) == 0 && S_ISLNK(st.st_mode))
612 migrate_one_snapshot(fd, fpath, &snapshot);
617 migrate_one_snapshot(fd, NULL, &snapshot);
622 * Migrate a single snapshot. If fpath is NULL the ioctl is flushed,
623 * otherwise it is flushed when it fills up.
627 migrate_one_snapshot(int fd, const char *fpath,
628 struct hammer_ioc_snapshot *snapshot)
631 hammer_snapshot_data_t snap;
645 tid = (hammer_tid_t)(int64_t)-1;
647 /* fpath may contain directory components */
648 if ((ptr = strrchr(fpath, '/')) != NULL)
652 while (*ptr && *ptr != '-' && *ptr != '.')
656 r = sscanf(ptr, "%4d%2d%2d-%2d%2d",
657 &year, &month, &day, &hour, &minute);
660 bzero(&tm, sizeof(tm));
665 tm.tm_mon = month - 1;
666 tm.tm_year = year - 1900;
669 bzero(linkbuf, sizeof(linkbuf));
670 if (readlink(fpath, linkbuf, sizeof(linkbuf) - 1) > 0 &&
671 (ptr = strrchr(linkbuf, '@')) != NULL &&
672 ptr > linkbuf && ptr[-1] == '@') {
673 tid = strtoull(ptr + 1, NULL, 16);
675 if (t != (time_t)-1 && tid != (hammer_tid_t)(int64_t)-1) {
676 snap = &snapshot->snaps[snapshot->count];
677 bzero(snap, sizeof(*snap));
679 snap->ts = (uint64_t)t * 1000000ULL;
680 snprintf(snap->label, sizeof(snap->label),
684 printf(" non-canonical snapshot softlink: %s->%s\n",
689 if ((fpath == NULL && snapshot->count) ||
690 snapshot->count == HAMMER_SNAPS_PER_IOCTL) {
691 printf(" (%d snapshots)", snapshot->count);
693 if (ioctl(fd, HAMMERIOC_ADD_SNAPSHOT, snapshot) < 0) {
694 printf(" Ioctl to migrate snapshots failed: %s\n",
696 } else if (snapshot->head.error == EALREADY) {
699 } else if (snapshot->head.error) {
700 printf(" Ioctl to migrate snapshots failed: %s\n",
701 strerror(snapshot->head.error));
703 printf("index %d\n", snapshot->index);
706 snapshot->head.error = 0;
716 val = strtol(ptr, &ptr, 0);
730 errx(1, "illegal suffix converting %s", ptr);
739 dividing_slash(const char *path)
741 int len = strlen(path);
742 if (len && path[len-1] == '/')
749 * Check whether the desired period has elapsed since the last successful
750 * run. The run may take a while and cross a boundary so we remember the
751 * current time_t so we can save it later on.
753 * Periods in minutes, hours, or days are assumed to have been crossed
754 * if the local time crosses a minute, hour, or day boundary regardless
755 * of how close the last operation actually was.
757 * If ForceOpt is set always return true.
761 check_period(const char *snapshots_path, const char *cmd, int arg1,
772 localtime_r(savep, &tp1);
781 * Retrieve the start time of the last successful operation.
783 asprintf(&check_path, "%s/.%s.period", snapshots_path, cmd);
784 fp = fopen(check_path, "r");
788 if (fgets(buf, sizeof(buf), fp) == NULL) {
794 lastt = strtol(buf, NULL, 0);
795 localtime_r(&lastt, &tp2);
798 * Normalize the times. e.g. if asked to do something on a 1-day
799 * interval the operation will be performed as soon as the day
800 * turns over relative to the previous operation, even if the previous
801 * operation ran a few seconds ago just before midnight.
803 if (arg1 % 60 == 0) {
807 if (arg1 % (60 * 60) == 0) {
811 if (arg1 % (24 * 60 * 60) == 0) {
816 baset = mktime(&tp1);
817 lastt = mktime(&tp2);
820 printf("%lld vs %lld\n", (long long)(baset - lastt), (long long)arg1);
823 if ((int)(baset - lastt) >= arg1)
829 * Store the start time of the last successful operation.
833 save_period(const char *snapshots_path, const char *cmd,
840 asprintf(&ocheck_path, "%s/.%s.period", snapshots_path, cmd);
841 asprintf(&ncheck_path, "%s/.%s.period.new", snapshots_path, cmd);
842 fp = fopen(ncheck_path, "w");
844 fprintf(fp, "0x%08llx\n", (long long)savet);
846 rename(ncheck_path, ocheck_path);
849 fprintf(stderr, "hammer: Unable to create period-file %s: %s\n",
850 ncheck_path, strerror(errno));
855 * Simply count the number of softlinks in the snapshots dir
859 check_softlinks(int fd, int new_config, const char *snapshots_path)
868 * Old-style softlink-based snapshots
870 if ((dir = opendir(snapshots_path)) != NULL) {
871 while ((den = readdir(dir)) != NULL) {
872 if (den->d_name[0] == '.')
874 asprintf(&fpath, "%s/%s", snapshots_path, den->d_name);
875 if (lstat(fpath, &st) == 0 && S_ISLNK(st.st_mode))
883 * New-style snapshots are stored as filesystem meta-data,
887 struct hammer_ioc_snapshot snapshot;
889 bzero(&snapshot, sizeof(snapshot));
891 if (ioctl(fd, HAMMERIOC_GET_SNAPSHOT, &snapshot) < 0) {
892 err(2, "hammer cleanup: check_softlink "
896 res += snapshot.count;
897 } while (snapshot.head.error == 0 && snapshot.count);
903 * Clean up expired softlinks in the snapshots dir
907 cleanup_softlinks(int fd, int new_config,
908 const char *snapshots_path, int arg2, char *arg3)
916 if (arg3 != NULL && strstr(arg3, "any") != NULL)
919 if ((dir = opendir(snapshots_path)) != NULL) {
920 while ((den = readdir(dir)) != NULL) {
921 if (den->d_name[0] == '.')
923 asprintf(&fpath, "%s/%s", snapshots_path, den->d_name);
924 if (lstat(fpath, &st) == 0 && S_ISLNK(st.st_mode) &&
925 (anylink || strncmp(den->d_name, "snap-", 5) == 0)) {
926 if (check_expired(den->d_name, arg2)) {
928 printf(" expire %s\n",
940 * New-style snapshots are stored as filesystem meta-data,
944 struct hammer_ioc_snapshot snapshot;
945 struct hammer_ioc_snapshot dsnapshot;
946 hammer_snapshot_data_t snap;
953 bzero(&snapshot, sizeof(snapshot));
954 bzero(&dsnapshot, sizeof(dsnapshot));
956 if (ioctl(fd, HAMMERIOC_GET_SNAPSHOT, &snapshot) < 0) {
957 err(2, "hammer cleanup: check_softlink "
961 for (i = 0; i < snapshot.count; ++i) {
962 snap = &snapshot.snaps[i];
963 t = snap->ts / 1000000ULL;
965 if ((int)dt > arg2 || snap->tid == 0) {
966 dsnapshot.snaps[dsnapshot.count++] =
969 if ((int)dt > arg2 && VerboseOpt) {
971 strftime(snapts, sizeof(snapts),
972 "%Y-%m-%d %H:%M:%S %Z", tp);
973 printf(" expire 0x%016jx %s %s\n",
974 (uintmax_t)snap->tid,
978 if (dsnapshot.count == HAMMER_SNAPS_PER_IOCTL)
979 delete_snapshots(fd, &dsnapshot);
981 } while (snapshot.head.error == 0 && snapshot.count);
984 delete_snapshots(fd, &dsnapshot);
990 delete_snapshots(int fd, struct hammer_ioc_snapshot *dsnapshot)
993 if (ioctl(fd, HAMMERIOC_DEL_SNAPSHOT, dsnapshot) < 0) {
994 printf(" Ioctl to delete snapshots failed: %s\n",
998 if (dsnapshot->head.error) {
999 printf(" Ioctl to delete snapshots failed at "
1000 "snap=%016jx: %s\n",
1001 dsnapshot->snaps[dsnapshot->index].tid,
1002 strerror(dsnapshot->head.error));
1003 if (++dsnapshot->index < dsnapshot->count)
1008 dsnapshot->index = 0;
1009 dsnapshot->count = 0;
1010 dsnapshot->head.error = 0;
1014 * Take a softlink path in the form snap-yyyymmdd-hhmm and the
1015 * expiration in seconds (arg2) and return non-zero if the softlink
1020 check_expired(const char *fpath, int arg2)
1031 while (*fpath && *fpath != '-' && *fpath != '.')
1036 r = sscanf(fpath, "%4d%2d%2d-%2d%2d",
1037 &year, &month, &day, &hour, &minute);
1040 bzero(&tm, sizeof(tm));
1045 tm.tm_mon = month - 1;
1046 tm.tm_year = year - 1900;
1048 if (t == (time_t)-1)
1062 create_snapshot(const char *path, const char *snapshots_path)
1066 runcmd(&r, "hammer snapshot %s %s", path, snapshots_path);
1072 cleanup_prune(const char *path, const char *snapshots_path,
1073 int arg1 __unused, int arg2, int snapshots_disabled)
1075 const char *path_or_snapshots_path;
1078 * If the snapshots_path (e.g. /var/hammer/...) has no snapshots
1079 * in it then prune will get confused and prune the filesystem
1080 * containing the snapshots_path instead of the requested
1081 * filesystem. De-confuse prune. We need a better way.
1083 if (hammer_softprune_testdir(snapshots_path))
1084 path_or_snapshots_path = snapshots_path;
1086 path_or_snapshots_path = path;
1089 * If snapshots have been disabled run prune-everything instead
1092 if (snapshots_disabled && arg2) {
1094 "hammer -c %s/.prune.cycle -t %d prune-everything %s",
1095 snapshots_path, arg2, path);
1096 } else if (snapshots_disabled) {
1097 runcmd(NULL, "hammer prune-everything %s", path);
1099 runcmd(NULL, "hammer -c %s/.prune.cycle -t %d prune %s",
1100 snapshots_path, arg2, path_or_snapshots_path);
1102 runcmd(NULL, "hammer prune %s", path_or_snapshots_path);
1109 cleanup_rebalance(const char *path, const char *snapshots_path,
1110 int arg1 __unused, int arg2)
1112 if (VerboseOpt == 0) {
1118 "hammer -c %s/.rebalance.cycle -t %d rebalance %s",
1119 snapshots_path, arg2, path);
1120 if (VerboseOpt == 0) {
1124 if (VerboseOpt == 0)
1131 cleanup_reblock(const char *path, const char *snapshots_path,
1132 int arg1 __unused, int arg2)
1134 if (VerboseOpt == 0) {
1140 * When reblocking the B-Tree always reblock everything in normal
1144 "hammer -c %s/.reblock-1.cycle -t %d reblock-btree %s",
1145 snapshots_path, arg2, path);
1146 if (VerboseOpt == 0) {
1152 * When reblocking the inodes always reblock everything in normal
1156 "hammer -c %s/.reblock-2.cycle -t %d reblock-inodes %s",
1157 snapshots_path, arg2, path);
1158 if (VerboseOpt == 0) {
1164 * When reblocking the directories always reblock everything in normal
1168 "hammer -c %s/.reblock-4.cycle -t %d reblock-dirs %s",
1169 snapshots_path, arg2, path);
1170 if (VerboseOpt == 0) {
1176 * Do not reblock all the data in normal mode.
1179 "hammer -c %s/.reblock-3.cycle -t %d reblock-data %s 95",
1180 snapshots_path, arg2, path);
1181 if (VerboseOpt == 0)
1188 cleanup_recopy(const char *path, const char *snapshots_path,
1189 int arg1 __unused, int arg2)
1191 if (VerboseOpt == 0) {
1196 "hammer -c %s/.recopy-1.cycle -t %d reblock-btree %s",
1197 snapshots_path, arg2, path);
1198 if (VerboseOpt == 0) {
1203 "hammer -c %s/.recopy-2.cycle -t %d reblock-inodes %s",
1204 snapshots_path, arg2, path);
1205 if (VerboseOpt == 0) {
1210 "hammer -c %s/.recopy-4.cycle -t %d reblock-dirs %s",
1211 snapshots_path, arg2, path);
1212 if (VerboseOpt == 0) {
1217 "hammer -c %s/.recopy-3.cycle -t %d reblock-data %s",
1218 snapshots_path, arg2, path);
1219 if (VerboseOpt == 0)
1226 cleanup_dedup(const char *path, const char *snapshots_path __unused,
1227 int arg1 __unused, int arg2)
1229 if (VerboseOpt == 0) {
1234 runcmd(NULL, "hammer -t %d dedup %s", arg2, path);
1235 if (VerboseOpt == 0) {
1239 if (VerboseOpt == 0)
1246 runcmd(int *resp, const char *ctl, ...)
1258 * Generate the command
1261 vasprintf(&cmd, ctl, va);
1264 printf(" %s\n", cmd);
1267 * Break us down into arguments. We do not just use system() here
1268 * because it blocks SIGINT and friends.
1272 av = malloc(sizeof(char *) * nmax);
1274 for (arg = strtok(cmd, WS); arg; arg = strtok(NULL, WS)) {
1275 if (n == nmax - 1) {
1277 av = realloc(av, sizeof(char *) * nmax);
1287 if ((pid = fork()) == 0) {
1288 if (VerboseOpt < 2) {
1289 int fd = open("/dev/null", O_RDWR);
1295 } else if (pid < 0) {
1300 while (waitpid(pid, &status, 0) != pid)
1302 res = WEXITSTATUS(status);