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_cleanup.c,v 1.6 2008/10/07 22:28:41 thomas Exp $
37 * Clean up specific HAMMER filesystems or all HAMMER filesystems.
39 * If no filesystems are specified any HAMMER- or null-mounted hammer PFS's
42 * Each HAMMER filesystem may contain a configuration file. If no
43 * configuration file is present one will be created with the following
46 * snapshots 1d 60d (0d 0d for /tmp, /var/tmp, /usr/obj)
49 * #dedup 1d 5m (not enabled by default)
53 * All hammer commands create and maintain cycle files in the snapshots
56 * For HAMMER version 2- the configuration file is a named 'config' in
57 * the snapshots directory, which defaults to <pfs>/snapshots.
58 * For HAMMER version 3+ the configuration file is saved in filesystem
59 * meta-data. The snapshots directory defaults to /var/hammer/<pfs>
60 * (/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);
103 * WARNING: Do not make the SNAPSHOTS_BASE "/var/snapshots" because
104 * it will interfere with the older HAMMER VERS < 3 snapshots directory
107 #define SNAPSHOTS_BASE "/var/hammer" /* HAMMER VERS >= 3 */
110 struct didpfs *FirstPFS;
113 hammer_cmd_cleanup(char **av, int ac)
115 char *fstype, *fs, *path;
116 struct statfs *stfsbuf;
121 mntsize = getmntinfo(&stfsbuf, MNT_NOWAIT);
123 for (i=0; i < mntsize; i++) {
125 * We will cleanup in the case fstype is hammer.
126 * If we have null-mounted PFS, we check the
127 * mount source. If it looks like a PFS, we
128 * proceed to cleanup also.
130 fstype = stfsbuf[i].f_fstypename;
131 fs = stfsbuf[i].f_mntfromname;
132 if ((strcmp(fstype, "hammer") == 0) ||
133 ((strcmp(fstype, "null") == 0) &&
134 (strstr(fs, "/@@0x") != NULL ||
135 strstr(fs, "/@@-1") != NULL))) {
136 path = stfsbuf[i].f_mntonname;
153 do_cleanup(const char *path)
155 struct hammer_ioc_pseudofs_rw pfs;
156 struct hammer_ioc_config config;
157 struct hammer_ioc_version version;
158 union hammer_ioc_mrecord_any mrec_tmp;
159 char *snapshots_path = NULL;
172 struct didpfs *didpfs;
173 int snapshots_disabled = 0;
174 int prune_warning = 0;
176 int snapshots_from_pfs = 0;
181 bzero(&pfs, sizeof(pfs));
182 bzero(&mrec_tmp, sizeof(mrec_tmp));
183 pfs.ondisk = &mrec_tmp.pfs.pfsd;
184 pfs.bytes = sizeof(mrec_tmp.pfs.pfsd);
187 printf("cleanup %-20s -", path);
188 fd = open(path, O_RDONLY);
190 printf(" unable to access directory: %s\n", strerror(errno));
193 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) < 0) {
194 printf(" not a HAMMER filesystem: %s\n", strerror(errno));
198 if (pfs.version != HAMMER_IOC_PSEUDOFS_VERSION) {
199 printf(" unrecognized HAMMER version\n");
203 bzero(&version, sizeof(version));
204 if (ioctl(fd, HAMMERIOC_GET_VERSION, &version) < 0) {
205 printf(" HAMMER filesystem but couldn't retrieve version!\n");
210 bzero(&config, sizeof(config));
211 if (version.cur_version >= 3) {
212 if (ioctl(fd, HAMMERIOC_GET_CONFIG, &config) == 0 &&
213 config.head.error == 0) {
219 * Make sure we have not already handled this PFS. Several nullfs
220 * mounts might alias the same PFS.
222 for (didpfs = FirstPFS; didpfs; didpfs = didpfs->next) {
223 if (bcmp(&didpfs->uuid, &mrec_tmp.pfs.pfsd.unique_uuid, sizeof(uuid_t)) == 0) {
224 printf(" PFS #%d already handled\n", pfs.pfs_id);
229 didpfs = malloc(sizeof(*didpfs));
230 didpfs->next = FirstPFS;
232 didpfs->uuid = mrec_tmp.pfs.pfsd.unique_uuid;
235 * Calculate the old snapshots directory for HAMMER VERSION < 3
237 * If the directory is explicitly specified in the PFS config
238 * we flag it and will not migrate it later.
240 if (mrec_tmp.pfs.pfsd.snapshots[0] == '/') {
241 asprintf(&snapshots_path, "%s", mrec_tmp.pfs.pfsd.snapshots);
242 snapshots_from_pfs = 1;
243 } else if (mrec_tmp.pfs.pfsd.snapshots[0]) {
244 printf(" WARNING: pfs-slave's snapshots dir is not absolute\n");
247 } else if (mrec_tmp.pfs.pfsd.mirror_flags & HAMMER_PFSD_SLAVE) {
248 if (version.cur_version < 3) {
249 printf(" WARNING: must configure snapshot dir for PFS slave\n");
250 printf("\tWe suggest <fs>/var/slaves/<name> where "
251 "<fs> is the base HAMMER fs\n");
252 printf("\tcontaining the slave\n");
257 asprintf(&snapshots_path,
258 "%s%ssnapshots", path, dividing_slash(path));
262 * Check for old-style config file
264 if (snapshots_path) {
265 asprintf(&config_path, "%s/config", snapshots_path);
266 fp = fopen(config_path, "r");
270 * Handle upgrades to hammer version 3, move the config
271 * file into meta-data.
273 * For the old config read the file into the config structure,
274 * we will parse it out of the config structure regardless.
276 if (version.cur_version >= 3) {
278 printf("(migrating) ");
280 migrate_config(fp, &config);
281 migrate_snapshots(fd, snapshots_path);
283 if (ioctl(fd, HAMMERIOC_SET_CONFIG, &config) < 0) {
284 printf(" cannot init meta-data config!\n");
289 } else if (new_config == 0) {
290 config_init(path, &config);
291 if (ioctl(fd, HAMMERIOC_SET_CONFIG, &config) < 0) {
292 printf(" cannot init meta-data config!\n");
300 * Create missing snapshots directory for HAMMER VERSION < 3
302 if (stat(snapshots_path, &st) < 0) {
303 if (mkdir(snapshots_path, 0755) != 0) {
304 free(snapshots_path);
305 printf(" unable to create snapshot dir \"%s\": %s\n",
306 snapshots_path, strerror(errno));
313 * Create missing config file for HAMMER VERSION < 3
316 config_init(path, &config);
317 fp = fopen(config_path, "w");
319 fwrite(config.config.text, 1,
320 strlen(config.config.text), fp);
324 migrate_config(fp, &config);
330 * If snapshots_from_pfs is not set we calculate the new snapshots
331 * directory default (in /var) for HAMMER VERSION >= 3 and migrate
332 * the old snapshots directory over.
334 * People who have set an explicit snapshots directory will have
335 * to migrate the data manually into /var/hammer, or not bother at
336 * all. People running slaves may wish to migrate it and then
337 * clear the snapshots specification in the PFS config for the
340 if (new_config && snapshots_from_pfs == 0) {
343 assert(path[0] == '/');
344 if (strcmp(path, "/") == 0)
345 asprintf(&npath, "%s/root", SNAPSHOTS_BASE);
347 asprintf(&npath, "%s/%s", SNAPSHOTS_BASE, path + 1);
348 if (snapshots_path) {
349 if (stat(npath, &st) < 0 && errno == ENOENT) {
350 if (stat(snapshots_path, &st) < 0 && errno == ENOENT) {
351 printf(" HAMMER UPGRADE: Creating snapshots\n"
352 "\tCreating snapshots in %s\n",
354 runcmd(&r, "mkdir -p %s", npath);
356 printf(" HAMMER UPGRADE: Moving snapshots\n"
357 "\tMoving snapshots from %s to %s\n",
358 snapshots_path, npath);
359 runcmd(&r, "mkdir -p %s", npath);
360 runcmd(&r, "cpdup %s %s", snapshots_path, npath);
362 printf("Unable to move snapshots directory!\n");
363 printf("Please fix this critical error.\n");
364 printf("Aborting cleanup of %s\n", path);
368 runcmd(&r, "rm -rf %s", snapshots_path);
371 free(snapshots_path);
372 } else if (stat(npath, &st) < 0 && errno == ENOENT) {
373 runcmd(&r, "mkdir -p %s", npath);
375 snapshots_path = npath;
379 * Lock the PFS. fd is the base directory of the mounted PFS.
381 if (flock(fd, LOCK_EX|LOCK_NB) == -1) {
382 if (errno == EWOULDBLOCK)
383 printf(" PFS #%d locked by other process\n", pfs.pfs_id);
385 printf(" can not lock %s: %s\n", config_path, strerror(errno));
390 printf(" handle PFS #%d using %s\n", pfs.pfs_id, snapshots_path);
393 * Process the config file
395 cbase = config.config.text;
397 while ((cptr = strchr(cbase, '\n')) != NULL) {
398 bcopy(cbase, buf, cptr - cbase);
399 buf[cptr - cbase] = 0;
402 cmd = strtok(buf, WS);
403 if (cmd == NULL || cmd[0] == '#')
409 if ((ptr = strtok(NULL, WS)) != NULL) {
410 arg1 = strtosecs(ptr);
411 if ((ptr = strtok(NULL, WS)) != NULL) {
412 arg2 = strtosecs(ptr);
413 arg3 = strtok(NULL, WS);
417 printf("%20s - ", cmd);
421 if (strcmp(cmd, "snapshots") == 0) {
424 check_softlinks(fd, new_config,
426 printf("only removing old snapshots\n");
428 cleanup_softlinks(fd, new_config,
432 printf("disabled\n");
433 snapshots_disabled = 1;
436 if (check_period(snapshots_path, cmd, arg1, &savet)) {
438 cleanup_softlinks(fd, new_config,
441 r = create_snapshot(path, snapshots_path);
445 } else if (arg1 == 0) {
447 * The commands following this check can't handle
448 * a period of 0, so call the feature disabled and
449 * ignore the directive.
451 printf("disabled\n");
452 } else if (strcmp(cmd, "prune") == 0) {
453 if (check_period(snapshots_path, cmd, arg1, &savet)) {
455 printf("run - WARNING snapshot "
457 "but snapshots disabled\n");
461 r = cleanup_prune(path, snapshots_path,
462 arg1, arg2, snapshots_disabled);
466 } else if (strcmp(cmd, "rebalance") == 0) {
468 if (check_period(snapshots_path, cmd, arg1, &savet)) {
473 r = cleanup_rebalance(path, snapshots_path,
478 } else if (strcmp(cmd, "reblock") == 0) {
479 if (check_period(snapshots_path, cmd, arg1, &savet)) {
484 r = cleanup_reblock(path, snapshots_path,
489 } else if (strcmp(cmd, "recopy") == 0) {
490 if (check_period(snapshots_path, cmd, arg1, &savet)) {
495 r = cleanup_recopy(path, snapshots_path,
500 } else if (strcmp(cmd, "dedup") == 0) {
501 if (check_period(snapshots_path, cmd, arg1, &savet)) {
506 r = cleanup_dedup(path, snapshots_path,
512 printf("unknown directive\n");
516 save_period(snapshots_path, cmd, savet);
520 * Add new rebalance feature if the config doesn't have it.
521 * (old style config only).
523 if (new_config == 0 && found_rebal == 0) {
524 if ((fp = fopen(config_path, "r+")) != NULL) {
526 fprintf(fp, "rebalance 1d 5m\n");
532 * Cleanup, and delay a little
539 * Initialize new config data (new or old style)
542 config_init(const char *path, struct hammer_ioc_config *config)
544 const char *snapshots;
546 if (strcmp(path, "/tmp") == 0 ||
547 strcmp(path, "/var/tmp") == 0 ||
548 strcmp(path, "/usr/obj") == 0) {
549 snapshots = "snapshots 0d 0d\n";
551 snapshots = "snapshots 1d 60d\n";
553 bzero(config->config.text, sizeof(config->config.text));
554 snprintf(config->config.text, sizeof(config->config.text) - 1, "%s%s",
564 * Migrate configuration data from the old snapshots/config
565 * file to the new meta-data format.
568 migrate_config(FILE *fp, struct hammer_ioc_config *config)
572 n = fread(config->config.text, 1, sizeof(config->config.text) - 1, fp);
574 bzero(config->config.text + n, sizeof(config->config.text) - n);
578 * Migrate snapshot softlinks in the snapshots directory to the
579 * new meta-data format. The softlinks are left intact, but
580 * this way the pruning code won't lose track of them if you
581 * happen to blow away the snapshots directory.
584 migrate_snapshots(int fd, const char *snapshots_path)
586 struct hammer_ioc_snapshot snapshot;
592 bzero(&snapshot, sizeof(snapshot));
594 if ((dir = opendir(snapshots_path)) != NULL) {
595 while ((den = readdir(dir)) != NULL) {
596 if (den->d_name[0] == '.')
598 asprintf(&fpath, "%s/%s", snapshots_path, den->d_name);
599 if (lstat(fpath, &st) == 0 && S_ISLNK(st.st_mode)) {
600 migrate_one_snapshot(fd, fpath, &snapshot);
606 migrate_one_snapshot(fd, NULL, &snapshot);
611 * Migrate a single snapshot. If fpath is NULL the ioctl is flushed,
612 * otherwise it is flushed when it fills up.
615 migrate_one_snapshot(int fd, const char *fpath,
616 struct hammer_ioc_snapshot *snapshot)
619 struct hammer_snapshot_data *snap;
633 tid = (hammer_tid_t)(int64_t)-1;
635 /* fpath may contain directory components */
636 if ((ptr = strrchr(fpath, '/')) != NULL)
640 while (*ptr && *ptr != '-' && *ptr != '.')
644 r = sscanf(ptr, "%4d%2d%2d-%2d%2d",
645 &year, &month, &day, &hour, &minute);
648 bzero(&tm, sizeof(tm));
653 tm.tm_mon = month - 1;
654 tm.tm_year = year - 1900;
657 bzero(linkbuf, sizeof(linkbuf));
658 if (readlink(fpath, linkbuf, sizeof(linkbuf) - 1) > 0 &&
659 (ptr = strrchr(linkbuf, '@')) != NULL &&
660 ptr > linkbuf && ptr[-1] == '@') {
661 tid = strtoull(ptr + 1, NULL, 16);
663 if (t != (time_t)-1 && tid != (hammer_tid_t)(int64_t)-1) {
664 snap = &snapshot->snaps[snapshot->count];
665 bzero(snap, sizeof(*snap));
667 snap->ts = (u_int64_t)t * 1000000ULL;
668 snprintf(snap->label, sizeof(snap->label),
672 printf(" non-canonical snapshot softlink: %s->%s\n",
677 if ((fpath == NULL && snapshot->count) ||
678 snapshot->count == HAMMER_SNAPS_PER_IOCTL) {
679 printf(" (%d snapshots)", snapshot->count);
681 if (ioctl(fd, HAMMERIOC_ADD_SNAPSHOT, snapshot) < 0) {
682 printf(" Ioctl to migrate snapshots failed: %s\n",
684 } else if (snapshot->head.error == EALREADY) {
687 } else if (snapshot->head.error) {
688 printf(" Ioctl to migrate snapshots failed: %s\n",
689 strerror(snapshot->head.error));
691 printf("index %d\n", snapshot->index);
694 snapshot->head.error = 0;
704 val = strtol(ptr, &ptr, 0);
718 errx(1, "illegal suffix converting %s\n", ptr);
725 dividing_slash(const char *path)
727 int len = strlen(path);
728 if (len && path[len-1] == '/')
735 * Check whether the desired period has elapsed since the last successful
736 * run. The run may take a while and cross a boundary so we remember the
737 * current time_t so we can save it later on.
739 * Periods in minutes, hours, or days are assumed to have been crossed
740 * if the local time crosses a minute, hour, or day boundary regardless
741 * of how close the last operation actually was.
743 * If ForceOpt is set always return true.
746 check_period(const char *snapshots_path, const char *cmd, int arg1,
757 localtime_r(savep, &tp1);
766 * Retrieve the start time of the last successful operation.
768 asprintf(&check_path, "%s/.%s.period", snapshots_path, cmd);
769 fp = fopen(check_path, "r");
773 if (fgets(buf, sizeof(buf), fp) == NULL) {
779 lastt = strtol(buf, NULL, 0);
780 localtime_r(&lastt, &tp2);
783 * Normalize the times. e.g. if asked to do something on a 1-day
784 * interval the operation will be performed as soon as the day
785 * turns over relative to the previous operation, even if the previous
786 * operation ran a few seconds ago just before midnight.
788 if (arg1 % 60 == 0) {
792 if (arg1 % (60 * 60) == 0) {
796 if (arg1 % (24 * 60 * 60) == 0) {
801 baset = mktime(&tp1);
802 lastt = mktime(&tp2);
805 printf("%lld vs %lld\n", (long long)(baset - lastt), (long long)arg1);
808 if ((int)(baset - lastt) >= arg1)
814 * Store the start time of the last successful operation.
817 save_period(const char *snapshots_path, const char *cmd,
824 asprintf(&ocheck_path, "%s/.%s.period", snapshots_path, cmd);
825 asprintf(&ncheck_path, "%s/.%s.period.new", snapshots_path, cmd);
826 fp = fopen(ncheck_path, "w");
828 fprintf(fp, "0x%08llx\n", (long long)savet);
830 rename(ncheck_path, ocheck_path);
833 fprintf(stderr, "hammer: Unable to create period-file %s: %s\n",
834 ncheck_path, strerror(errno));
839 * Simply count the number of softlinks in the snapshots dir
842 check_softlinks(int fd, int new_config, const char *snapshots_path)
851 * Old-style softlink-based snapshots
853 if ((dir = opendir(snapshots_path)) != NULL) {
854 while ((den = readdir(dir)) != NULL) {
855 if (den->d_name[0] == '.')
857 asprintf(&fpath, "%s/%s", snapshots_path, den->d_name);
858 if (lstat(fpath, &st) == 0 && S_ISLNK(st.st_mode))
866 * New-style snapshots are stored as filesystem meta-data,
870 struct hammer_ioc_snapshot snapshot;
872 bzero(&snapshot, sizeof(snapshot));
874 if (ioctl(fd, HAMMERIOC_GET_SNAPSHOT, &snapshot) < 0) {
875 err(2, "hammer cleanup: check_softlink "
879 res += snapshot.count;
880 } while (snapshot.head.error == 0 && snapshot.count);
886 * Clean up expired softlinks in the snapshots dir
889 cleanup_softlinks(int fd, int new_config,
890 const char *snapshots_path, int arg2, char *arg3)
898 if (arg3 != NULL && strstr(arg3, "any") != NULL)
901 if ((dir = opendir(snapshots_path)) != NULL) {
902 while ((den = readdir(dir)) != NULL) {
903 if (den->d_name[0] == '.')
905 asprintf(&fpath, "%s/%s", snapshots_path, den->d_name);
906 if (lstat(fpath, &st) == 0 && S_ISLNK(st.st_mode) &&
907 (anylink || strncmp(den->d_name, "snap-", 5) == 0)
909 if (check_expired(den->d_name, arg2)) {
911 printf(" expire %s\n",
923 * New-style snapshots are stored as filesystem meta-data,
927 struct hammer_ioc_snapshot snapshot;
928 struct hammer_ioc_snapshot dsnapshot;
929 struct hammer_snapshot_data *snap;
936 bzero(&snapshot, sizeof(snapshot));
937 bzero(&dsnapshot, sizeof(dsnapshot));
939 if (ioctl(fd, HAMMERIOC_GET_SNAPSHOT, &snapshot) < 0) {
940 err(2, "hammer cleanup: check_softlink "
944 for (i = 0; i < snapshot.count; ++i) {
945 snap = &snapshot.snaps[i];
946 t = snap->ts / 1000000ULL;
948 if ((int)dt > arg2 || snap->tid == 0) {
949 dsnapshot.snaps[dsnapshot.count++] =
952 if ((int)dt > arg2 && VerboseOpt) {
954 strftime(snapts, sizeof(snapts),
955 "%Y-%m-%d %H:%M:%S %Z", tp);
956 printf(" expire 0x%016jx %s %s\n",
957 (uintmax_t)snap->tid,
961 if (dsnapshot.count == HAMMER_SNAPS_PER_IOCTL)
962 delete_snapshots(fd, &dsnapshot);
964 } while (snapshot.head.error == 0 && snapshot.count);
967 delete_snapshots(fd, &dsnapshot);
972 delete_snapshots(int fd, struct hammer_ioc_snapshot *dsnapshot)
975 if (ioctl(fd, HAMMERIOC_DEL_SNAPSHOT, dsnapshot) < 0) {
976 printf(" Ioctl to delete snapshots failed: %s\n",
980 if (dsnapshot->head.error) {
981 printf(" Ioctl to delete snapshots failed at "
983 dsnapshot->snaps[dsnapshot->index].tid,
984 strerror(dsnapshot->head.error));
985 if (++dsnapshot->index < dsnapshot->count)
990 dsnapshot->index = 0;
991 dsnapshot->count = 0;
992 dsnapshot->head.error = 0;
996 * Take a softlink path in the form snap-yyyymmdd-hhmm and the
997 * expiration in seconds (arg2) and return non-zero if the softlink
1001 check_expired(const char *fpath, int arg2)
1012 while (*fpath && *fpath != '-' && *fpath != '.')
1017 r = sscanf(fpath, "%4d%2d%2d-%2d%2d",
1018 &year, &month, &day, &hour, &minute);
1021 bzero(&tm, sizeof(tm));
1026 tm.tm_mon = month - 1;
1027 tm.tm_year = year - 1900;
1029 if (t == (time_t)-1)
1042 create_snapshot(const char *path, const char *snapshots_path)
1046 runcmd(&r, "hammer snapshot %s %s", path, snapshots_path);
1051 cleanup_prune(const char *path __unused, const char *snapshots_path,
1052 int arg1 __unused, int arg2, int snapshots_disabled)
1055 * If snapshots have been disabled run prune-everything instead
1058 if (snapshots_disabled && arg2) {
1059 runcmd(NULL, "hammer -c %s/.prune.cycle -t %d prune-everything %s",
1060 snapshots_path, arg2, path);
1061 } else if (snapshots_disabled) {
1062 runcmd(NULL, "hammer prune-everything %s", path);
1064 runcmd(NULL, "hammer -c %s/.prune.cycle -t %d prune %s",
1065 snapshots_path, arg2, snapshots_path);
1067 runcmd(NULL, "hammer prune %s", snapshots_path);
1073 cleanup_rebalance(const char *path, const char *snapshots_path,
1074 int arg1 __unused, int arg2)
1076 if (VerboseOpt == 0) {
1082 "hammer -c %s/.rebalance.cycle -t %d rebalance %s",
1083 snapshots_path, arg2, path);
1084 if (VerboseOpt == 0) {
1088 if (VerboseOpt == 0)
1094 cleanup_reblock(const char *path, const char *snapshots_path,
1095 int arg1 __unused, int arg2)
1097 if (VerboseOpt == 0) {
1103 * When reblocking the B-Tree always reblock everything in normal
1107 "hammer -c %s/.reblock-1.cycle -t %d reblock-btree %s",
1108 snapshots_path, arg2, path);
1109 if (VerboseOpt == 0) {
1115 * When reblocking the inodes always reblock everything in normal
1119 "hammer -c %s/.reblock-2.cycle -t %d reblock-inodes %s",
1120 snapshots_path, arg2, path);
1121 if (VerboseOpt == 0) {
1127 * When reblocking the directories always reblock everything in normal
1131 "hammer -c %s/.reblock-4.cycle -t %d reblock-dirs %s",
1132 snapshots_path, arg2, path);
1133 if (VerboseOpt == 0) {
1139 * Do not reblock all the data in normal mode.
1142 "hammer -c %s/.reblock-3.cycle -t %d reblock-data %s 95",
1143 snapshots_path, arg2, path);
1144 if (VerboseOpt == 0)
1150 cleanup_recopy(const char *path, const char *snapshots_path,
1151 int arg1 __unused, int arg2)
1153 if (VerboseOpt == 0) {
1158 "hammer -c %s/.recopy-1.cycle -t %d reblock-btree %s",
1159 snapshots_path, arg2, path);
1160 if (VerboseOpt == 0) {
1165 "hammer -c %s/.recopy-2.cycle -t %d reblock-inodes %s",
1166 snapshots_path, arg2, path);
1167 if (VerboseOpt == 0) {
1172 "hammer -c %s/.recopy-4.cycle -t %d reblock-dirs %s",
1173 snapshots_path, arg2, path);
1174 if (VerboseOpt == 0) {
1179 "hammer -c %s/.recopy-3.cycle -t %d reblock-data %s",
1180 snapshots_path, arg2, path);
1181 if (VerboseOpt == 0)
1187 cleanup_dedup(const char *path, const char *snapshots_path __unused,
1188 int arg1 __unused, int arg2)
1190 if (VerboseOpt == 0) {
1195 runcmd(NULL, "hammer -t %d dedup %s", arg2, path);
1196 if (VerboseOpt == 0) {
1200 if (VerboseOpt == 0)
1207 runcmd(int *resp, const char *ctl, ...)
1219 * Generate the command
1222 vasprintf(&cmd, ctl, va);
1225 printf(" %s\n", cmd);
1228 * Break us down into arguments. We do not just use system() here
1229 * because it blocks SIGINT and friends.
1233 av = malloc(sizeof(char *) * nmax);
1235 for (arg = strtok(cmd, WS); arg; arg = strtok(NULL, WS)) {
1236 if (n == nmax - 1) {
1238 av = realloc(av, sizeof(char *) * nmax);
1248 if ((pid = fork()) == 0) {
1249 if (VerboseOpt < 2) {
1250 int fd = open("/dev/null", O_RDWR);
1256 } else if (pid < 0) {
1261 while (waitpid(pid, &status, 0) != pid)
1263 res = WEXITSTATUS(status);