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).
69 static void do_cleanup(const char *path);
70 static void config_init(const char *path, struct hammer_ioc_config *config);
71 static void migrate_config(FILE *fp, struct hammer_ioc_config *config);
72 static void migrate_snapshots(int fd, const char *snapshots_path);
73 static void migrate_one_snapshot(int fd, const char *fpath,
74 struct hammer_ioc_snapshot *snapshot);
75 static int strtosecs(char *ptr);
76 static const char *dividing_slash(const char *path);
77 static int check_period(const char *snapshots_path, const char *cmd, int arg1,
79 static void save_period(const char *snapshots_path, const char *cmd,
81 static int check_softlinks(int fd, int new_config, const char *snapshots_path);
82 static void cleanup_softlinks(int fd, int new_config,
83 const char *snapshots_path, int arg2, char *arg3);
84 static void delete_snapshots(int fd, struct hammer_ioc_snapshot *dsnapshot);
85 static int check_expired(const char *fpath, int arg2);
87 static int create_snapshot(const char *path, const char *snapshots_path);
88 static int cleanup_rebalance(const char *path, const char *snapshots_path,
90 static int cleanup_prune(const char *path, const char *snapshots_path,
91 int arg1, int arg2, int snapshots_disabled);
92 static int cleanup_reblock(const char *path, const char *snapshots_path,
94 static int cleanup_recopy(const char *path, const char *snapshots_path,
96 static int cleanup_dedup(const char *path, const char *snapshots_path,
99 static void runcmd(int *resp, const char *ctl, ...) __printflike(2, 3);
102 * WARNING: Do not make the SNAPSHOTS_BASE "/var/snapshots" because
103 * it will interfere with the older HAMMER VERS < 3 snapshots directory
106 #define SNAPSHOTS_BASE "/var/hammer" /* HAMMER VERS >= 3 */
109 struct didpfs *FirstPFS;
112 hammer_cmd_cleanup(char **av, int ac)
114 char *fstype, *fs, *path;
115 struct statfs *stfsbuf;
120 mntsize = getmntinfo(&stfsbuf, MNT_NOWAIT);
122 for (i=0; i < mntsize; i++) {
124 * We will cleanup in the case fstype is hammer.
125 * If we have null-mounted PFS, we check the
126 * mount source. If it looks like a PFS, we
127 * proceed to cleanup also.
129 fstype = stfsbuf[i].f_fstypename;
130 fs = stfsbuf[i].f_mntfromname;
131 if ((strcmp(fstype, "hammer") == 0) ||
132 ((strcmp(fstype, "null") == 0) &&
133 (strstr(fs, "/@@0x") != NULL ||
134 strstr(fs, "/@@-1") != NULL))) {
135 path = stfsbuf[i].f_mntonname;
152 do_cleanup(const char *path)
154 struct hammer_ioc_pseudofs_rw pfs;
155 struct hammer_ioc_config config;
156 struct hammer_ioc_version version;
157 union hammer_ioc_mrecord_any mrec_tmp;
158 char *snapshots_path = NULL;
171 struct didpfs *didpfs;
172 int snapshots_disabled = 0;
173 int prune_warning = 0;
175 int snapshots_from_pfs = 0;
180 bzero(&pfs, sizeof(pfs));
181 bzero(&mrec_tmp, sizeof(mrec_tmp));
182 pfs.ondisk = &mrec_tmp.pfs.pfsd;
183 pfs.bytes = sizeof(mrec_tmp.pfs.pfsd);
186 printf("cleanup %-20s -", path);
187 fd = open(path, O_RDONLY);
189 printf(" unable to access directory: %s\n", strerror(errno));
192 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) < 0) {
193 printf(" not a HAMMER filesystem: %s\n", strerror(errno));
197 if (pfs.version != HAMMER_IOC_PSEUDOFS_VERSION) {
198 printf(" unrecognized HAMMER version\n");
202 bzero(&version, sizeof(version));
203 if (ioctl(fd, HAMMERIOC_GET_VERSION, &version) < 0) {
204 printf(" HAMMER filesystem but couldn't retrieve version!\n");
209 bzero(&config, sizeof(config));
210 if (version.cur_version >= 3) {
211 if (ioctl(fd, HAMMERIOC_GET_CONFIG, &config) == 0 &&
212 config.head.error == 0) {
218 * Make sure we have not already handled this PFS. Several nullfs
219 * mounts might alias the same PFS.
221 for (didpfs = FirstPFS; didpfs; didpfs = didpfs->next) {
222 if (bcmp(&didpfs->uuid, &mrec_tmp.pfs.pfsd.unique_uuid, sizeof(uuid_t)) == 0) {
223 printf(" PFS #%d already handled\n", pfs.pfs_id);
228 didpfs = malloc(sizeof(*didpfs));
229 didpfs->next = FirstPFS;
231 didpfs->uuid = mrec_tmp.pfs.pfsd.unique_uuid;
234 * Calculate the old snapshots directory for HAMMER VERSION < 3
236 * If the directory is explicitly specified in the PFS config
237 * we flag it and will not migrate it later.
239 if (mrec_tmp.pfs.pfsd.snapshots[0] == '/') {
240 asprintf(&snapshots_path, "%s", mrec_tmp.pfs.pfsd.snapshots);
241 snapshots_from_pfs = 1;
242 } else if (mrec_tmp.pfs.pfsd.snapshots[0]) {
243 printf(" WARNING: pfs-slave's snapshots dir is not absolute\n");
246 } else if (mrec_tmp.pfs.pfsd.mirror_flags & HAMMER_PFSD_SLAVE) {
247 if (version.cur_version < 3) {
248 printf(" WARNING: must configure snapshot dir for PFS slave\n");
249 printf("\tWe suggest <fs>/var/slaves/<name> where "
250 "<fs> is the base HAMMER fs\n");
251 printf("\tcontaining the slave\n");
256 asprintf(&snapshots_path,
257 "%s%ssnapshots", path, dividing_slash(path));
261 * Check for old-style config file
263 if (snapshots_path) {
264 asprintf(&config_path, "%s/config", snapshots_path);
265 fp = fopen(config_path, "r");
269 * Handle upgrades to hammer version 3, move the config
270 * file into meta-data.
272 * For the old config read the file into the config structure,
273 * we will parse it out of the config structure regardless.
275 if (version.cur_version >= 3) {
277 printf("(migrating) ");
279 migrate_config(fp, &config);
280 migrate_snapshots(fd, snapshots_path);
282 if (ioctl(fd, HAMMERIOC_SET_CONFIG, &config) < 0) {
283 printf(" cannot init meta-data config!\n");
288 } else if (new_config == 0) {
289 config_init(path, &config);
290 if (ioctl(fd, HAMMERIOC_SET_CONFIG, &config) < 0) {
291 printf(" cannot init meta-data config!\n");
299 * Create missing snapshots directory for HAMMER VERSION < 3
301 if (stat(snapshots_path, &st) < 0) {
302 if (mkdir(snapshots_path, 0755) != 0) {
303 free(snapshots_path);
304 printf(" unable to create snapshot dir \"%s\": %s\n",
305 snapshots_path, strerror(errno));
312 * Create missing config file for HAMMER VERSION < 3
315 config_init(path, &config);
316 fp = fopen(config_path, "w");
318 fwrite(config.config.text, 1,
319 strlen(config.config.text), fp);
323 migrate_config(fp, &config);
329 * If snapshots_from_pfs is not set we calculate the new snapshots
330 * directory default (in /var) for HAMMER VERSION >= 3 and migrate
331 * the old snapshots directory over.
333 * People who have set an explicit snapshots directory will have
334 * to migrate the data manually into /var/hammer, or not bother at
335 * all. People running slaves may wish to migrate it and then
336 * clear the snapshots specification in the PFS config for the
339 if (new_config && snapshots_from_pfs == 0) {
342 assert(path[0] == '/');
343 if (strcmp(path, "/") == 0)
344 asprintf(&npath, "%s/root", SNAPSHOTS_BASE);
346 asprintf(&npath, "%s/%s", SNAPSHOTS_BASE, path + 1);
347 if (snapshots_path) {
348 if (stat(npath, &st) < 0 && errno == ENOENT) {
349 if (stat(snapshots_path, &st) < 0 && errno == ENOENT) {
350 printf(" HAMMER UPGRADE: Creating snapshots\n"
351 "\tCreating snapshots in %s\n",
353 runcmd(&r, "mkdir -p %s", npath);
355 printf(" HAMMER UPGRADE: Moving snapshots\n"
356 "\tMoving snapshots from %s to %s\n",
357 snapshots_path, npath);
358 runcmd(&r, "mkdir -p %s", npath);
359 runcmd(&r, "cpdup %s %s", snapshots_path, npath);
361 printf("Unable to move snapshots directory!\n");
362 printf("Please fix this critical error.\n");
363 printf("Aborting cleanup of %s\n", path);
367 runcmd(&r, "rm -rf %s", snapshots_path);
370 free(snapshots_path);
371 } else if (stat(npath, &st) < 0 && errno == ENOENT) {
372 runcmd(&r, "mkdir -p %s", npath);
374 snapshots_path = npath;
378 * Lock the PFS. fd is the base directory of the mounted PFS.
380 if (flock(fd, LOCK_EX|LOCK_NB) == -1) {
381 if (errno == EWOULDBLOCK)
382 printf(" PFS #%d locked by other process\n", pfs.pfs_id);
384 printf(" can not lock %s: %s\n", config_path, strerror(errno));
389 printf(" handle PFS #%d using %s\n", pfs.pfs_id, snapshots_path);
391 struct pidfh *pfh = NULL;
392 static char pidfile[PIDFILE_BUFSIZE];
394 snprintf (pidfile, PIDFILE_BUFSIZE, "%s/hammer.cleanup.%d",
395 pidfile_loc, getpid());
396 pfh = pidfile_open(pidfile, 0644, NULL);
398 warn ("Unable to open or create %s", pidfile);
403 * Process the config file
405 cbase = config.config.text;
407 while ((cptr = strchr(cbase, '\n')) != NULL) {
408 bcopy(cbase, buf, cptr - cbase);
409 buf[cptr - cbase] = 0;
412 cmd = strtok(buf, WS);
413 if (cmd == NULL || cmd[0] == '#')
419 if ((ptr = strtok(NULL, WS)) != NULL) {
420 arg1 = strtosecs(ptr);
421 if ((ptr = strtok(NULL, WS)) != NULL) {
422 arg2 = strtosecs(ptr);
423 arg3 = strtok(NULL, WS);
427 printf("%20s - ", cmd);
431 if (strcmp(cmd, "snapshots") == 0) {
434 check_softlinks(fd, new_config,
436 printf("only removing old snapshots\n");
438 cleanup_softlinks(fd, new_config,
442 printf("disabled\n");
443 snapshots_disabled = 1;
446 if (check_period(snapshots_path, cmd, arg1, &savet)) {
448 cleanup_softlinks(fd, new_config,
451 r = create_snapshot(path, snapshots_path);
455 } else if (arg1 == 0) {
457 * The commands following this check can't handle
458 * a period of 0, so call the feature disabled and
459 * ignore the directive.
461 printf("disabled\n");
462 } else if (strcmp(cmd, "prune") == 0) {
463 if (check_period(snapshots_path, cmd, arg1, &savet)) {
465 printf("run - WARNING snapshot "
467 "but snapshots disabled\n");
471 r = cleanup_prune(path, snapshots_path,
472 arg1, arg2, snapshots_disabled);
476 } else if (strcmp(cmd, "rebalance") == 0) {
478 if (check_period(snapshots_path, cmd, arg1, &savet)) {
483 r = cleanup_rebalance(path, snapshots_path,
488 } else if (strcmp(cmd, "reblock") == 0) {
489 if (check_period(snapshots_path, cmd, arg1, &savet)) {
494 r = cleanup_reblock(path, snapshots_path,
499 } else if (strcmp(cmd, "recopy") == 0) {
500 if (check_period(snapshots_path, cmd, arg1, &savet)) {
505 r = cleanup_recopy(path, snapshots_path,
510 } else if (strcmp(cmd, "dedup") == 0) {
511 if (check_period(snapshots_path, cmd, arg1, &savet)) {
516 r = cleanup_dedup(path, snapshots_path,
522 printf("unknown directive\n");
526 save_period(snapshots_path, cmd, savet);
530 * Add new rebalance feature if the config doesn't have it.
531 * (old style config only).
533 if (new_config == 0 && found_rebal == 0) {
534 if ((fp = fopen(config_path, "r+")) != NULL) {
536 fprintf(fp, "rebalance 1d 5m\n");
542 * Cleanup, and delay a little
551 * Initialize new config data (new or old style)
554 config_init(const char *path, struct hammer_ioc_config *config)
556 const char *snapshots;
558 if (strcmp(path, "/tmp") == 0 ||
559 strcmp(path, "/var/tmp") == 0 ||
560 strcmp(path, "/usr/obj") == 0) {
561 snapshots = "snapshots 0d 0d\n";
563 snapshots = "snapshots 1d 60d\n";
565 bzero(config->config.text, sizeof(config->config.text));
566 snprintf(config->config.text, sizeof(config->config.text) - 1, "%s%s",
576 * Migrate configuration data from the old snapshots/config
577 * file to the new meta-data format.
580 migrate_config(FILE *fp, struct hammer_ioc_config *config)
584 n = fread(config->config.text, 1, sizeof(config->config.text) - 1, fp);
586 bzero(config->config.text + n, sizeof(config->config.text) - n);
590 * Migrate snapshot softlinks in the snapshots directory to the
591 * new meta-data format. The softlinks are left intact, but
592 * this way the pruning code won't lose track of them if you
593 * 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);
618 migrate_one_snapshot(fd, NULL, &snapshot);
623 * Migrate a single snapshot. If fpath is NULL the ioctl is flushed,
624 * otherwise it is flushed when it fills up.
627 migrate_one_snapshot(int fd, const char *fpath,
628 struct hammer_ioc_snapshot *snapshot)
631 struct hammer_snapshot_data *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 = (u_int64_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\n", ptr);
737 dividing_slash(const char *path)
739 int len = strlen(path);
740 if (len && path[len-1] == '/')
747 * Check whether the desired period has elapsed since the last successful
748 * run. The run may take a while and cross a boundary so we remember the
749 * current time_t so we can save it later on.
751 * Periods in minutes, hours, or days are assumed to have been crossed
752 * if the local time crosses a minute, hour, or day boundary regardless
753 * of how close the last operation actually was.
755 * If ForceOpt is set always return true.
758 check_period(const char *snapshots_path, const char *cmd, int arg1,
769 localtime_r(savep, &tp1);
778 * Retrieve the start time of the last successful operation.
780 asprintf(&check_path, "%s/.%s.period", snapshots_path, cmd);
781 fp = fopen(check_path, "r");
785 if (fgets(buf, sizeof(buf), fp) == NULL) {
791 lastt = strtol(buf, NULL, 0);
792 localtime_r(&lastt, &tp2);
795 * Normalize the times. e.g. if asked to do something on a 1-day
796 * interval the operation will be performed as soon as the day
797 * turns over relative to the previous operation, even if the previous
798 * operation ran a few seconds ago just before midnight.
800 if (arg1 % 60 == 0) {
804 if (arg1 % (60 * 60) == 0) {
808 if (arg1 % (24 * 60 * 60) == 0) {
813 baset = mktime(&tp1);
814 lastt = mktime(&tp2);
817 printf("%lld vs %lld\n", (long long)(baset - lastt), (long long)arg1);
820 if ((int)(baset - lastt) >= arg1)
826 * Store the start time of the last successful operation.
829 save_period(const char *snapshots_path, const char *cmd,
836 asprintf(&ocheck_path, "%s/.%s.period", snapshots_path, cmd);
837 asprintf(&ncheck_path, "%s/.%s.period.new", snapshots_path, cmd);
838 fp = fopen(ncheck_path, "w");
840 fprintf(fp, "0x%08llx\n", (long long)savet);
842 rename(ncheck_path, ocheck_path);
845 fprintf(stderr, "hammer: Unable to create period-file %s: %s\n",
846 ncheck_path, strerror(errno));
851 * Simply count the number of softlinks in the snapshots dir
854 check_softlinks(int fd, int new_config, const char *snapshots_path)
863 * Old-style softlink-based snapshots
865 if ((dir = opendir(snapshots_path)) != NULL) {
866 while ((den = readdir(dir)) != NULL) {
867 if (den->d_name[0] == '.')
869 asprintf(&fpath, "%s/%s", snapshots_path, den->d_name);
870 if (lstat(fpath, &st) == 0 && S_ISLNK(st.st_mode))
878 * New-style snapshots are stored as filesystem meta-data,
882 struct hammer_ioc_snapshot snapshot;
884 bzero(&snapshot, sizeof(snapshot));
886 if (ioctl(fd, HAMMERIOC_GET_SNAPSHOT, &snapshot) < 0) {
887 err(2, "hammer cleanup: check_softlink "
891 res += snapshot.count;
892 } while (snapshot.head.error == 0 && snapshot.count);
898 * Clean up expired softlinks in the snapshots dir
901 cleanup_softlinks(int fd, int new_config,
902 const char *snapshots_path, int arg2, char *arg3)
910 if (arg3 != NULL && strstr(arg3, "any") != NULL)
913 if ((dir = opendir(snapshots_path)) != NULL) {
914 while ((den = readdir(dir)) != NULL) {
915 if (den->d_name[0] == '.')
917 asprintf(&fpath, "%s/%s", snapshots_path, den->d_name);
918 if (lstat(fpath, &st) == 0 && S_ISLNK(st.st_mode) &&
919 (anylink || strncmp(den->d_name, "snap-", 5) == 0)
921 if (check_expired(den->d_name, arg2)) {
923 printf(" expire %s\n",
935 * New-style snapshots are stored as filesystem meta-data,
939 struct hammer_ioc_snapshot snapshot;
940 struct hammer_ioc_snapshot dsnapshot;
941 struct hammer_snapshot_data *snap;
948 bzero(&snapshot, sizeof(snapshot));
949 bzero(&dsnapshot, sizeof(dsnapshot));
951 if (ioctl(fd, HAMMERIOC_GET_SNAPSHOT, &snapshot) < 0) {
952 err(2, "hammer cleanup: check_softlink "
956 for (i = 0; i < snapshot.count; ++i) {
957 snap = &snapshot.snaps[i];
958 t = snap->ts / 1000000ULL;
960 if ((int)dt > arg2 || snap->tid == 0) {
961 dsnapshot.snaps[dsnapshot.count++] =
964 if ((int)dt > arg2 && VerboseOpt) {
966 strftime(snapts, sizeof(snapts),
967 "%Y-%m-%d %H:%M:%S %Z", tp);
968 printf(" expire 0x%016jx %s %s\n",
969 (uintmax_t)snap->tid,
973 if (dsnapshot.count == HAMMER_SNAPS_PER_IOCTL)
974 delete_snapshots(fd, &dsnapshot);
976 } while (snapshot.head.error == 0 && snapshot.count);
979 delete_snapshots(fd, &dsnapshot);
984 delete_snapshots(int fd, struct hammer_ioc_snapshot *dsnapshot)
987 if (ioctl(fd, HAMMERIOC_DEL_SNAPSHOT, dsnapshot) < 0) {
988 printf(" Ioctl to delete snapshots failed: %s\n",
992 if (dsnapshot->head.error) {
993 printf(" Ioctl to delete snapshots failed at "
995 dsnapshot->snaps[dsnapshot->index].tid,
996 strerror(dsnapshot->head.error));
997 if (++dsnapshot->index < dsnapshot->count)
1002 dsnapshot->index = 0;
1003 dsnapshot->count = 0;
1004 dsnapshot->head.error = 0;
1008 * Take a softlink path in the form snap-yyyymmdd-hhmm and the
1009 * expiration in seconds (arg2) and return non-zero if the softlink
1013 check_expired(const char *fpath, int arg2)
1024 while (*fpath && *fpath != '-' && *fpath != '.')
1029 r = sscanf(fpath, "%4d%2d%2d-%2d%2d",
1030 &year, &month, &day, &hour, &minute);
1033 bzero(&tm, sizeof(tm));
1038 tm.tm_mon = month - 1;
1039 tm.tm_year = year - 1900;
1041 if (t == (time_t)-1)
1054 create_snapshot(const char *path, const char *snapshots_path)
1058 runcmd(&r, "hammer snapshot %s %s", path, snapshots_path);
1063 cleanup_prune(const char *path, const char *snapshots_path,
1064 int arg1 __unused, int arg2, int snapshots_disabled)
1066 const char *path_or_snapshots_path;
1067 struct softprune *base = NULL;
1068 struct hammer_ioc_prune dummy_template;
1070 bzero(&dummy_template, sizeof(dummy_template));
1071 hammer_softprune_scandir(&base, &dummy_template, snapshots_path);
1074 * If the snapshots_path (e.g. /var/hammer/...) has no snapshots
1075 * in it then prune will get confused and prune the filesystem
1076 * containing the snapshots_path instead of the requested
1077 * filesystem. De-confuse prune. We need a better way.
1079 path_or_snapshots_path = base ? snapshots_path : path;
1082 * If snapshots have been disabled run prune-everything instead
1085 if (snapshots_disabled && arg2) {
1087 "hammer -c %s/.prune.cycle -t %d prune-everything %s",
1088 snapshots_path, arg2, path);
1089 } else if (snapshots_disabled) {
1090 runcmd(NULL, "hammer prune-everything %s", path);
1092 runcmd(NULL, "hammer -c %s/.prune.cycle -t %d prune %s",
1093 snapshots_path, arg2, path_or_snapshots_path);
1095 runcmd(NULL, "hammer prune %s", path_or_snapshots_path);
1101 cleanup_rebalance(const char *path, const char *snapshots_path,
1102 int arg1 __unused, int arg2)
1104 if (VerboseOpt == 0) {
1110 "hammer -c %s/.rebalance.cycle -t %d rebalance %s",
1111 snapshots_path, arg2, path);
1112 if (VerboseOpt == 0) {
1116 if (VerboseOpt == 0)
1122 cleanup_reblock(const char *path, const char *snapshots_path,
1123 int arg1 __unused, int arg2)
1125 if (VerboseOpt == 0) {
1131 * When reblocking the B-Tree always reblock everything in normal
1135 "hammer -c %s/.reblock-1.cycle -t %d reblock-btree %s",
1136 snapshots_path, arg2, path);
1137 if (VerboseOpt == 0) {
1143 * When reblocking the inodes always reblock everything in normal
1147 "hammer -c %s/.reblock-2.cycle -t %d reblock-inodes %s",
1148 snapshots_path, arg2, path);
1149 if (VerboseOpt == 0) {
1155 * When reblocking the directories always reblock everything in normal
1159 "hammer -c %s/.reblock-4.cycle -t %d reblock-dirs %s",
1160 snapshots_path, arg2, path);
1161 if (VerboseOpt == 0) {
1167 * Do not reblock all the data in normal mode.
1170 "hammer -c %s/.reblock-3.cycle -t %d reblock-data %s 95",
1171 snapshots_path, arg2, path);
1172 if (VerboseOpt == 0)
1178 cleanup_recopy(const char *path, const char *snapshots_path,
1179 int arg1 __unused, int arg2)
1181 if (VerboseOpt == 0) {
1186 "hammer -c %s/.recopy-1.cycle -t %d reblock-btree %s",
1187 snapshots_path, arg2, path);
1188 if (VerboseOpt == 0) {
1193 "hammer -c %s/.recopy-2.cycle -t %d reblock-inodes %s",
1194 snapshots_path, arg2, path);
1195 if (VerboseOpt == 0) {
1200 "hammer -c %s/.recopy-4.cycle -t %d reblock-dirs %s",
1201 snapshots_path, arg2, path);
1202 if (VerboseOpt == 0) {
1207 "hammer -c %s/.recopy-3.cycle -t %d reblock-data %s",
1208 snapshots_path, arg2, path);
1209 if (VerboseOpt == 0)
1215 cleanup_dedup(const char *path, const char *snapshots_path __unused,
1216 int arg1 __unused, int arg2)
1218 if (VerboseOpt == 0) {
1223 runcmd(NULL, "hammer -t %d dedup %s", arg2, path);
1224 if (VerboseOpt == 0) {
1228 if (VerboseOpt == 0)
1235 runcmd(int *resp, const char *ctl, ...)
1247 * Generate the command
1250 vasprintf(&cmd, ctl, va);
1253 printf(" %s\n", cmd);
1256 * Break us down into arguments. We do not just use system() here
1257 * because it blocks SIGINT and friends.
1261 av = malloc(sizeof(char *) * nmax);
1263 for (arg = strtok(cmd, WS); arg; arg = strtok(NULL, WS)) {
1264 if (n == nmax - 1) {
1266 av = realloc(av, sizeof(char *) * nmax);
1276 if ((pid = fork()) == 0) {
1277 if (VerboseOpt < 2) {
1278 int fd = open("/dev/null", O_RDWR);
1284 } else if (pid < 0) {
1289 while (waitpid(pid, &status, 0) != pid)
1291 res = WEXITSTATUS(status);