hammer1 - Fix left-over /va/run/hammer.cleanup files
[dragonfly.git] / sbin / hammer / cmd_cleanup.c
CommitLineData
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1/*
2 * Copyright (c) 2008 The DragonFly Project. All rights reserved.
5e435c92 3 *
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4 * This code is derived from software contributed to The DragonFly Project
5 * by Matthew Dillon <dillon@backplane.com>
84e57c2c 6 *
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7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
84e57c2c 10 *
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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
16 * distribution.
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.
84e57c2c 20 *
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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
32 * SUCH DAMAGE.
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33 */
34/*
16265794 35 * Clean up specific HAMMER filesystems or all HAMMER filesystems.
6a6e350f 36 *
f6532f03 37 * If no filesystems are specified any HAMMER- or null-mounted hammer PFS's
16265794 38 * are cleaned.
6a6e350f 39 *
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40 * Each HAMMER filesystem may contain a configuration file. If no
41 * configuration file is present one will be created with the following
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42 * defaults:
43 *
5e435c92 44 * snapshots 1d 60d (0d 0d for /tmp, /var/tmp, /usr/obj)
6a6e350f 45 * prune 1d 5m
f13fea8b 46 * rebalance 1d 5m
bb29b5d8 47 * #dedup 1d 5m (not enabled by default)
6a6e350f 48 * reblock 1d 5m
f6532f03 49 * recopy 30d 10m
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50 *
51 * All hammer commands create and maintain cycle files in the snapshots
52 * directory.
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53 *
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).
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59 */
60
61#include "hammer.h"
62
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63#include <libutil.h>
64
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65struct didpfs {
66 struct didpfs *next;
90da8fc8 67 hammer_uuid_t uuid;
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68};
69
6a6e350f 70static void do_cleanup(const char *path);
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71static void config_init(const char *path, struct hammer_ioc_config *config);
72static void migrate_config(FILE *fp, struct hammer_ioc_config *config);
73static void migrate_snapshots(int fd, const char *snapshots_path);
74static void migrate_one_snapshot(int fd, const char *fpath,
75 struct hammer_ioc_snapshot *snapshot);
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76static int strtosecs(char *ptr);
77static const char *dividing_slash(const char *path);
78static int check_period(const char *snapshots_path, const char *cmd, int arg1,
79 time_t *savep);
80static void save_period(const char *snapshots_path, const char *cmd,
81 time_t savet);
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82static int check_softlinks(int fd, int new_config, const char *snapshots_path);
83static void cleanup_softlinks(int fd, int new_config,
84 const char *snapshots_path, int arg2, char *arg3);
ec2aa11d 85static void delete_snapshots(int fd, struct hammer_ioc_snapshot *dsnapshot);
ff1c9800 86static int check_expired(const char *fpath, int arg2);
6a6e350f 87
b5ec5ad4 88static int create_snapshot(const char *path, const char *snapshots_path);
0b8bd7da 89static int cleanup_rebalance(const char *path, const char *snapshots_path,
83f2a3aa 90 int arg1, int arg2);
6a6e350f 91static int cleanup_prune(const char *path, const char *snapshots_path,
83f2a3aa 92 int arg1, int arg2, int snapshots_disabled);
6a6e350f 93static int cleanup_reblock(const char *path, const char *snapshots_path,
83f2a3aa 94 int arg1, int arg2);
6a6e350f 95static int cleanup_recopy(const char *path, const char *snapshots_path,
83f2a3aa 96 int arg1, int arg2);
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97static int cleanup_dedup(const char *path, const char *snapshots_path,
98 int arg1, int arg2);
6a6e350f 99
b58f1e66 100static void runcmd(int *resp, const char *ctl, ...) __printflike(2, 3);
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101
102#define WS " \t\r\n"
6a6e350f 103
c453712a 104struct didpfs *FirstPFS;
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105
106void
107hammer_cmd_cleanup(char **av, int ac)
108{
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109 char *fstype, *fs, *path;
110 struct statfs *stfsbuf;
111 int mntsize, i;
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112
113 tzset();
114 if (ac == 0) {
eac446c5 115 mntsize = getmntinfo(&stfsbuf, MNT_NOWAIT);
f254e677 116 if (mntsize > 0) {
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117 for (i=0; i < mntsize; i++) {
118 /*
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.
123 */
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;
131 do_cleanup(path);
132 }
574066d3 133 }
f254e677 134 }
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135 } else {
136 while (ac) {
137 do_cleanup(*av);
138 --ac;
139 ++av;
140 }
141 }
142}
143
144static
145void
146do_cleanup(const char *path)
147{
148 struct hammer_ioc_pseudofs_rw pfs;
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149 struct hammer_ioc_config config;
150 struct hammer_ioc_version version;
6a6e350f 151 union hammer_ioc_mrecord_any mrec_tmp;
82893617 152 char *snapshots_path = NULL;
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153 char *config_path;
154 struct stat st;
155 char *cmd;
156 char *ptr;
157 int arg1;
158 int arg2;
5e435c92 159 char *arg3;
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160 time_t savet;
161 char buf[256];
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162 char *cbase;
163 char *cptr;
82893617 164 FILE *fp = NULL;
c453712a 165 struct didpfs *didpfs;
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166 int snapshots_disabled = 0;
167 int prune_warning = 0;
83f2a3aa 168 int new_config = 0;
b5ec5ad4 169 int snapshots_from_pfs = 0;
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170 int fd;
171 int r;
0b8bd7da 172 int found_rebal = 0;
6a6e350f 173
6a6e350f 174 bzero(&mrec_tmp, sizeof(mrec_tmp));
1b23fc22 175 clrpfs(&pfs, &mrec_tmp.pfs.pfsd, -1);
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176
177 printf("cleanup %-20s -", path);
178 fd = open(path, O_RDONLY);
179 if (fd < 0) {
180 printf(" unable to access directory: %s\n", strerror(errno));
181 return;
182 }
83f2a3aa 183 if (ioctl(fd, HAMMERIOC_GET_PSEUDOFS, &pfs) < 0) {
6a6e350f 184 printf(" not a HAMMER filesystem: %s\n", strerror(errno));
83f2a3aa 185 close(fd);
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186 return;
187 }
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188 if (pfs.version != HAMMER_IOC_PSEUDOFS_VERSION) {
189 printf(" unrecognized HAMMER version\n");
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190 close(fd);
191 return;
192 }
193 bzero(&version, sizeof(version));
194 if (ioctl(fd, HAMMERIOC_GET_VERSION, &version) < 0) {
195 printf(" HAMMER filesystem but couldn't retrieve version!\n");
196 close(fd);
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197 return;
198 }
4c09d9c4 199 HammerVersion = version.cur_version;
6a6e350f 200
83f2a3aa 201 bzero(&config, sizeof(config));
f254e677 202 if (version.cur_version >= 3) {
83f2a3aa 203 if (ioctl(fd, HAMMERIOC_GET_CONFIG, &config) == 0 &&
f254e677 204 config.head.error == 0) {
83f2a3aa 205 new_config = 1;
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206 }
207 }
83f2a3aa 208
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209 /*
210 * Make sure we have not already handled this PFS. Several nullfs
211 * mounts might alias the same PFS.
212 */
f254e677 213 for (didpfs = FirstPFS; didpfs; didpfs = didpfs->next) {
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214 if (hammer_uuid_compare(&didpfs->uuid,
215 &mrec_tmp.pfs.pfsd.unique_uuid) == 0) {
affce8d3 216 printf(" PFS#%d already handled\n", pfs.pfs_id);
83f2a3aa 217 close(fd);
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218 return;
219 }
f254e677 220 }
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221 didpfs = malloc(sizeof(*didpfs));
222 didpfs->next = FirstPFS;
223 FirstPFS = didpfs;
224 didpfs->uuid = mrec_tmp.pfs.pfsd.unique_uuid;
6a6e350f 225
ff1c9800 226 /*
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227 * Calculate the old snapshots directory for HAMMER VERSION < 3
228 *
229 * If the directory is explicitly specified in the PFS config
230 * we flag it and will not migrate it later.
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231 */
232 if (mrec_tmp.pfs.pfsd.snapshots[0] == '/') {
233 asprintf(&snapshots_path, "%s", mrec_tmp.pfs.pfsd.snapshots);
b5ec5ad4 234 snapshots_from_pfs = 1;
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235 } else if (mrec_tmp.pfs.pfsd.snapshots[0]) {
236 printf(" WARNING: pfs-slave's snapshots dir is not absolute\n");
83f2a3aa 237 close(fd);
ff1c9800 238 return;
2bacc088 239 } else if (hammer_is_pfs_slave(&mrec_tmp.pfs.pfsd)) {
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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");
245 close(fd);
246 return;
247 }
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248 } else {
249 asprintf(&snapshots_path,
250 "%s%ssnapshots", path, dividing_slash(path));
251 }
252
6a6e350f 253 /*
b5ec5ad4 254 * Check for old-style config file
6a6e350f 255 */
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256 if (snapshots_path) {
257 asprintf(&config_path, "%s/config", snapshots_path);
258 fp = fopen(config_path, "r");
259 }
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260
261 /*
262 * Handle upgrades to hammer version 3, move the config
263 * file into meta-data.
264 *
265 * For the old config read the file into the config structure,
266 * we will parse it out of the config structure regardless.
267 */
268 if (version.cur_version >= 3) {
269 if (fp) {
270 printf("(migrating) ");
271 fflush(stdout);
272 migrate_config(fp, &config);
273 migrate_snapshots(fd, snapshots_path);
274 fclose(fp);
275 if (ioctl(fd, HAMMERIOC_SET_CONFIG, &config) < 0) {
276 printf(" cannot init meta-data config!\n");
277 close(fd);
278 return;
279 }
280 remove(config_path);
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");
285 close(fd);
286 return;
287 }
6a6e350f 288 }
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289 new_config = 1;
290 } else {
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291 /*
292 * Create missing snapshots directory for HAMMER VERSION < 3
293 */
f254e677 294 if (stat(snapshots_path, &st) < 0) {
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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));
299 close(fd);
300 return;
301 }
f254e677 302 }
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303
304 /*
305 * Create missing config file for HAMMER VERSION < 3
306 */
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307 if (fp == NULL) {
308 config_init(path, &config);
309 fp = fopen(config_path, "w");
310 if (fp) {
311 fwrite(config.config.text, 1,
312 strlen(config.config.text), fp);
313 fclose(fp);
314 }
6a6e350f 315 } else {
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316 migrate_config(fp, &config);
317 fclose(fp);
6a6e350f 318 }
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319 }
320
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321 /*
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.
325 *
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
330 * slave.
331 */
332 if (new_config && snapshots_from_pfs == 0) {
333 char *npath;
334
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335 if (path[0] != '/') {
336 printf(" path must start with '/'\n");
337 return;
338 }
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339 if (strcmp(path, "/") == 0)
340 asprintf(&npath, "%s/root", SNAPSHOTS_BASE);
341 else
342 asprintf(&npath, "%s/%s", SNAPSHOTS_BASE, path + 1);
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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",
348 npath);
349 runcmd(&r, "mkdir -p %s", npath);
350 } else {
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);
356 if (r != 0) {
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357 printf("Unable to move snapshots directory!\n");
358 printf("Please fix this critical error.\n");
359 printf("Aborting cleanup of %s\n", path);
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360 close(fd);
361 return;
362 }
363 runcmd(&r, "rm -rf %s", snapshots_path);
b5ec5ad4 364 }
b5ec5ad4 365 }
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366 free(snapshots_path);
367 } else if (stat(npath, &st) < 0 && errno == ENOENT) {
368 runcmd(&r, "mkdir -p %s", npath);
b5ec5ad4 369 }
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370 snapshots_path = npath;
371 }
372
373 /*
374 * Lock the PFS. fd is the base directory of the mounted PFS.
375 */
83f2a3aa 376 if (flock(fd, LOCK_EX|LOCK_NB) == -1) {
5bd5f172 377 if (errno == EWOULDBLOCK)
affce8d3 378 printf(" PFS#%d locked by other process\n", pfs.pfs_id);
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379 else
380 printf(" can not lock %s: %s\n", config_path, strerror(errno));
83f2a3aa 381 close(fd);
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382 return;
383 }
384
affce8d3 385 printf(" handle PFS#%d using %s\n", pfs.pfs_id, snapshots_path);
6a6e350f 386
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387 struct pidfh *pfh = NULL;
388 static char pidfile[PIDFILE_BUFSIZE];
389
390 snprintf (pidfile, PIDFILE_BUFSIZE, "%s/hammer.cleanup.%d",
391 pidfile_loc, getpid());
392 pfh = pidfile_open(pidfile, 0644, NULL);
52e2f1b5 393 if (pfh == NULL)
a360fdde 394 warn ("Unable to open or create %s", pidfile);
a360fdde
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395 pidfile_write(pfh);
396
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397 /*
398 * Process the config file
399 */
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400 cbase = config.config.text;
401
402 while ((cptr = strchr(cbase, '\n')) != NULL) {
403 bcopy(cbase, buf, cptr - cbase);
404 buf[cptr - cbase] = 0;
405 cbase = cptr + 1;
406
6a6e350f 407 cmd = strtok(buf, WS);
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408 if (cmd == NULL || cmd[0] == '#')
409 continue;
410
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411 arg1 = 0;
412 arg2 = 0;
5e435c92 413 arg3 = NULL;
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414 if ((ptr = strtok(NULL, WS)) != NULL) {
415 arg1 = strtosecs(ptr);
5e435c92 416 if ((ptr = strtok(NULL, WS)) != NULL) {
6a6e350f 417 arg2 = strtosecs(ptr);
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418 arg3 = strtok(NULL, WS);
419 }
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420 }
421
422 printf("%20s - ", cmd);
423 fflush(stdout);
424
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425 r = 1;
426 if (strcmp(cmd, "snapshots") == 0) {
5e435c92 427 if (arg1 == 0) {
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428 if (arg2 &&
429 check_softlinks(fd, new_config,
430 snapshots_path)) {
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431 printf("only removing old snapshots\n");
432 prune_warning = 1;
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433 cleanup_softlinks(fd, new_config,
434 snapshots_path,
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435 arg2, arg3);
436 } else {
437 printf("disabled\n");
438 snapshots_disabled = 1;
439 }
440 } else
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441 if (check_period(snapshots_path, cmd, arg1, &savet)) {
442 printf("run\n");
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443 cleanup_softlinks(fd, new_config,
444 snapshots_path,
5e435c92 445 arg2, arg3);
b5ec5ad4 446 r = create_snapshot(path, snapshots_path);
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447 } else {
448 printf("skip\n");
449 }
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450 } else if (arg1 == 0) {
451 /*
452 * The commands following this check can't handle
453 * a period of 0, so call the feature disabled and
454 * ignore the directive.
455 */
456 printf("disabled\n");
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457 } else if (strcmp(cmd, "prune") == 0) {
458 if (check_period(snapshots_path, cmd, arg1, &savet)) {
f254e677 459 if (prune_warning) {
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460 printf("run - WARNING snapshot "
461 "softlinks present "
462 "but snapshots disabled\n");
f254e677 463 } else {
c6c298a7 464 printf("run\n");
f254e677 465 }
6a6e350f 466 r = cleanup_prune(path, snapshots_path,
c6c298a7 467 arg1, arg2, snapshots_disabled);
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468 } else {
469 printf("skip\n");
470 }
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471 } else if (strcmp(cmd, "rebalance") == 0) {
472 found_rebal = 1;
473 if (check_period(snapshots_path, cmd, arg1, &savet)) {
474 printf("run");
475 fflush(stdout);
476 if (VerboseOpt)
477 printf("\n");
478 r = cleanup_rebalance(path, snapshots_path,
479 arg1, arg2);
480 } else {
481 printf("skip\n");
482 }
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483 } else if (strcmp(cmd, "reblock") == 0) {
484 if (check_period(snapshots_path, cmd, arg1, &savet)) {
485 printf("run");
486 fflush(stdout);
487 if (VerboseOpt)
488 printf("\n");
489 r = cleanup_reblock(path, snapshots_path,
490 arg1, arg2);
491 } else {
492 printf("skip\n");
493 }
494 } else if (strcmp(cmd, "recopy") == 0) {
495 if (check_period(snapshots_path, cmd, arg1, &savet)) {
496 printf("run");
497 fflush(stdout);
498 if (VerboseOpt)
499 printf("\n");
500 r = cleanup_recopy(path, snapshots_path,
501 arg1, arg2);
502 } else {
503 printf("skip\n");
504 }
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505 } else if (strcmp(cmd, "dedup") == 0) {
506 if (check_period(snapshots_path, cmd, arg1, &savet)) {
507 printf("run");
508 fflush(stdout);
509 if (VerboseOpt)
510 printf("\n");
511 r = cleanup_dedup(path, snapshots_path,
512 arg1, arg2);
513 } else {
514 printf("skip\n");
515 }
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516 } else {
517 printf("unknown directive\n");
518 r = 1;
519 }
520 if (r == 0)
521 save_period(snapshots_path, cmd, savet);
522 }
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523
524 /*
83f2a3aa 525 * Add new rebalance feature if the config doesn't have it.
b5ec5ad4 526 * (old style config only).
0b8bd7da 527 */
f254e677 528 if (new_config == 0 && found_rebal == 0) {
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MD
529 if ((fp = fopen(config_path, "r+")) != NULL) {
530 fseek(fp, 0L, 2);
531 fprintf(fp, "rebalance 1d 5m\n");
532 fclose(fp);
533 }
f254e677 534 }
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535
536 /*
537 * Cleanup, and delay a little
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538 *
539 * NOTE: pidfile_remove() closes, removes, and frees the pfh.
540 * pidfile_close() closes and frees.
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541 */
542 close(fd);
6a6e350f 543 usleep(1000);
a360fdde 544 pidfile_remove(pfh);
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545}
546
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547/*
548 * Initialize new config data (new or old style)
549 */
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550static
551void
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552config_init(const char *path, struct hammer_ioc_config *config)
553{
554 const char *snapshots;
555
556 if (strcmp(path, "/tmp") == 0 ||
557 strcmp(path, "/var/tmp") == 0 ||
f254e677 558 strcmp(path, "/usr/obj") == 0) {
83f2a3aa 559 snapshots = "snapshots 0d 0d\n";
f254e677 560 } else {
83f2a3aa 561 snapshots = "snapshots 1d 60d\n";
f254e677 562 }
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563 bzero(config->config.text, sizeof(config->config.text));
564 snprintf(config->config.text, sizeof(config->config.text) - 1, "%s%s",
565 snapshots,
566 "prune 1d 5m\n"
567 "rebalance 1d 5m\n"
bb29b5d8 568 "#dedup 1d 5m\n"
83f2a3aa 569 "reblock 1d 5m\n"
f6532f03 570 "recopy 30d 10m\n");
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571}
572
573/*
574 * Migrate configuration data from the old snapshots/config
16265794 575 * file to the new meta-data format.
83f2a3aa 576 */
005a4da7
TK
577static
578void
83f2a3aa
MD
579migrate_config(FILE *fp, struct hammer_ioc_config *config)
580{
581 int n;
582
583 n = fread(config->config.text, 1, sizeof(config->config.text) - 1, fp);
584 if (n >= 0)
585 bzero(config->config.text + n, sizeof(config->config.text) - n);
586}
587
588/*
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.
593 */
005a4da7
TK
594static
595void
83f2a3aa
MD
596migrate_snapshots(int fd, const char *snapshots_path)
597{
598 struct hammer_ioc_snapshot snapshot;
599 struct dirent *den;
600 struct stat st;
601 DIR *dir;
602 char *fpath;
603
604 bzero(&snapshot, sizeof(snapshot));
605
606 if ((dir = opendir(snapshots_path)) != NULL) {
607 while ((den = readdir(dir)) != NULL) {
608 if (den->d_name[0] == '.')
609 continue;
610 asprintf(&fpath, "%s/%s", snapshots_path, den->d_name);
52e2f1b5 611 if (lstat(fpath, &st) == 0 && S_ISLNK(st.st_mode))
83f2a3aa 612 migrate_one_snapshot(fd, fpath, &snapshot);
83f2a3aa
MD
613 free(fpath);
614 }
615 closedir(dir);
616 }
617 migrate_one_snapshot(fd, NULL, &snapshot);
618
619}
620
621/*
622 * Migrate a single snapshot. If fpath is NULL the ioctl is flushed,
623 * otherwise it is flushed when it fills up.
624 */
005a4da7
TK
625static
626void
83f2a3aa
MD
627migrate_one_snapshot(int fd, const char *fpath,
628 struct hammer_ioc_snapshot *snapshot)
629{
630 if (fpath) {
46e9f340 631 hammer_snapshot_data_t snap;
83f2a3aa
MD
632 struct tm tm;
633 time_t t;
634 int year;
635 int month;
636 int day = 0;
637 int hour = 0;
638 int minute = 0;
639 int r;
640 char linkbuf[1024];
641 const char *ptr;
642 hammer_tid_t tid;
643
644 t = (time_t)-1;
645 tid = (hammer_tid_t)(int64_t)-1;
646
f510bf3e
YT
647 /* fpath may contain directory components */
648 if ((ptr = strrchr(fpath, '/')) != NULL)
649 ++ptr;
650 else
651 ptr = fpath;
83f2a3aa
MD
652 while (*ptr && *ptr != '-' && *ptr != '.')
653 ++ptr;
654 if (*ptr)
655 ++ptr;
656 r = sscanf(ptr, "%4d%2d%2d-%2d%2d",
657 &year, &month, &day, &hour, &minute);
658
659 if (r >= 3) {
660 bzero(&tm, sizeof(tm));
661 tm.tm_isdst = -1;
662 tm.tm_min = minute;
663 tm.tm_hour = hour;
664 tm.tm_mday = day;
665 tm.tm_mon = month - 1;
666 tm.tm_year = year - 1900;
667 t = mktime(&tm);
668 }
669 bzero(linkbuf, sizeof(linkbuf));
670 if (readlink(fpath, linkbuf, sizeof(linkbuf) - 1) > 0 &&
671 (ptr = strrchr(linkbuf, '@')) != NULL &&
f254e677 672 ptr > linkbuf && ptr[-1] == '@') {
83f2a3aa 673 tid = strtoull(ptr + 1, NULL, 16);
f254e677 674 }
83f2a3aa
MD
675 if (t != (time_t)-1 && tid != (hammer_tid_t)(int64_t)-1) {
676 snap = &snapshot->snaps[snapshot->count];
677 bzero(snap, sizeof(*snap));
678 snap->tid = tid;
46137e17 679 snap->ts = (uint64_t)t * 1000000ULL;
83f2a3aa
MD
680 snprintf(snap->label, sizeof(snap->label),
681 "migrated");
682 ++snapshot->count;
f510bf3e
YT
683 } else {
684 printf(" non-canonical snapshot softlink: %s->%s\n",
685 fpath, linkbuf);
83f2a3aa
MD
686 }
687 }
688
689 if ((fpath == NULL && snapshot->count) ||
690 snapshot->count == HAMMER_SNAPS_PER_IOCTL) {
691 printf(" (%d snapshots)", snapshot->count);
692again:
693 if (ioctl(fd, HAMMERIOC_ADD_SNAPSHOT, snapshot) < 0) {
694 printf(" Ioctl to migrate snapshots failed: %s\n",
695 strerror(errno));
696 } else if (snapshot->head.error == EALREADY) {
697 ++snapshot->index;
698 goto again;
699 } else if (snapshot->head.error) {
068da2c2 700 printf(" Ioctl to migrate snapshots failed: %s\n",
83f2a3aa
MD
701 strerror(snapshot->head.error));
702 }
703 printf("index %d\n", snapshot->index);
704 snapshot->index = 0;
705 snapshot->count = 0;
706 snapshot->head.error = 0;
707 }
708}
709
6a6e350f
MD
710static
711int
712strtosecs(char *ptr)
713{
714 int val;
715
716 val = strtol(ptr, &ptr, 0);
717 switch(*ptr) {
718 case 'd':
719 val *= 24;
720 /* fall through */
721 case 'h':
722 val *= 60;
723 /* fall through */
724 case 'm':
725 val *= 60;
726 /* fall through */
727 case 's':
728 break;
729 default:
c3e30e91 730 errx(1, "illegal suffix converting %s", ptr);
052fd72b 731 /* not reached */
6a6e350f
MD
732 break;
733 }
734 return(val);
735}
736
005a4da7
TK
737static
738const char *
6a6e350f
MD
739dividing_slash(const char *path)
740{
741 int len = strlen(path);
742 if (len && path[len-1] == '/')
743 return("");
744 else
745 return("/");
746}
747
748/*
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.
752 *
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.
bdc54107
MD
756 *
757 * If ForceOpt is set always return true.
6a6e350f 758 */
005a4da7
TK
759static
760int
6a6e350f
MD
761check_period(const char *snapshots_path, const char *cmd, int arg1,
762 time_t *savep)
763{
764 char *check_path;
765 struct tm tp1;
766 struct tm tp2;
767 FILE *fp;
768 time_t baset, lastt;
769 char buf[256];
770
771 time(savep);
772 localtime_r(savep, &tp1);
773
bdc54107
MD
774 /*
775 * Force run if -F
776 */
777 if (ForceOpt)
778 return(1);
779
6a6e350f
MD
780 /*
781 * Retrieve the start time of the last successful operation.
782 */
783 asprintf(&check_path, "%s/.%s.period", snapshots_path, cmd);
784 fp = fopen(check_path, "r");
785 free(check_path);
786 if (fp == NULL)
787 return(1);
788 if (fgets(buf, sizeof(buf), fp) == NULL) {
789 fclose(fp);
790 return(1);
791 }
792 fclose(fp);
793
794 lastt = strtol(buf, NULL, 0);
795 localtime_r(&lastt, &tp2);
796
797 /*
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.
802 */
803 if (arg1 % 60 == 0) {
804 tp1.tm_sec = 0;
805 tp2.tm_sec = 0;
806 }
807 if (arg1 % (60 * 60) == 0) {
808 tp1.tm_min = 0;
809 tp2.tm_min = 0;
810 }
811 if (arg1 % (24 * 60 * 60) == 0) {
812 tp1.tm_hour = 0;
813 tp2.tm_hour = 0;
814 }
815
816 baset = mktime(&tp1);
817 lastt = mktime(&tp2);
818
819#if 0
820 printf("%lld vs %lld\n", (long long)(baset - lastt), (long long)arg1);
821#endif
822
823 if ((int)(baset - lastt) >= arg1)
824 return(1);
825 return(0);
826}
827
828/*
829 * Store the start time of the last successful operation.
830 */
005a4da7
TK
831static
832void
6a6e350f
MD
833save_period(const char *snapshots_path, const char *cmd,
834 time_t savet)
835{
836 char *ocheck_path;
837 char *ncheck_path;
838 FILE *fp;
839
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");
3b9fbdea
MD
843 if (fp) {
844 fprintf(fp, "0x%08llx\n", (long long)savet);
845 if (fclose(fp) == 0)
846 rename(ncheck_path, ocheck_path);
847 remove(ncheck_path);
848 } else {
849 fprintf(stderr, "hammer: Unable to create period-file %s: %s\n",
850 ncheck_path, strerror(errno));
851 }
6a6e350f
MD
852}
853
ff1c9800
MD
854/*
855 * Simply count the number of softlinks in the snapshots dir
856 */
005a4da7
TK
857static
858int
83f2a3aa 859check_softlinks(int fd, int new_config, const char *snapshots_path)
c6c298a7
MD
860{
861 struct dirent *den;
862 struct stat st;
863 DIR *dir;
864 char *fpath;
865 int res = 0;
866
83f2a3aa
MD
867 /*
868 * Old-style softlink-based snapshots
869 */
c6c298a7
MD
870 if ((dir = opendir(snapshots_path)) != NULL) {
871 while ((den = readdir(dir)) != NULL) {
872 if (den->d_name[0] == '.')
873 continue;
874 asprintf(&fpath, "%s/%s", snapshots_path, den->d_name);
875 if (lstat(fpath, &st) == 0 && S_ISLNK(st.st_mode))
876 ++res;
877 free(fpath);
878 }
879 closedir(dir);
880 }
83f2a3aa
MD
881
882 /*
883 * New-style snapshots are stored as filesystem meta-data,
884 * count those too.
885 */
886 if (new_config) {
887 struct hammer_ioc_snapshot snapshot;
888
889 bzero(&snapshot, sizeof(snapshot));
890 do {
f254e677 891 if (ioctl(fd, HAMMERIOC_GET_SNAPSHOT, &snapshot) < 0) {
83f2a3aa
MD
892 err(2, "hammer cleanup: check_softlink "
893 "snapshot error");
f254e677
TK
894 /* not reached */
895 }
83f2a3aa
MD
896 res += snapshot.count;
897 } while (snapshot.head.error == 0 && snapshot.count);
898 }
899 return (res);
c6c298a7
MD
900}
901
ff1c9800
MD
902/*
903 * Clean up expired softlinks in the snapshots dir
904 */
005a4da7
TK
905static
906void
83f2a3aa
MD
907cleanup_softlinks(int fd, int new_config,
908 const char *snapshots_path, int arg2, char *arg3)
ff1c9800
MD
909{
910 struct dirent *den;
911 struct stat st;
912 DIR *dir;
913 char *fpath;
5e435c92
MD
914 int anylink = 0;
915
09e1b0d6 916 if (arg3 != NULL && strstr(arg3, "any") != NULL)
5e435c92 917 anylink = 1;
ff1c9800
MD
918
919 if ((dir = opendir(snapshots_path)) != NULL) {
920 while ((den = readdir(dir)) != NULL) {
921 if (den->d_name[0] == '.')
922 continue;
923 asprintf(&fpath, "%s/%s", snapshots_path, den->d_name);
924 if (lstat(fpath, &st) == 0 && S_ISLNK(st.st_mode) &&
9a620123 925 (anylink || strncmp(den->d_name, "snap-", 5) == 0)) {
ff1c9800 926 if (check_expired(den->d_name, arg2)) {
f254e677 927 if (VerboseOpt) {
ff1c9800
MD
928 printf(" expire %s\n",
929 fpath);
f254e677 930 }
ff1c9800
MD
931 remove(fpath);
932 }
933 }
934 free(fpath);
935 }
936 closedir(dir);
937 }
83f2a3aa
MD
938
939 /*
940 * New-style snapshots are stored as filesystem meta-data,
941 * count those too.
942 */
943 if (new_config) {
944 struct hammer_ioc_snapshot snapshot;
945 struct hammer_ioc_snapshot dsnapshot;
46e9f340 946 hammer_snapshot_data_t snap;
83f2a3aa
MD
947 struct tm *tp;
948 time_t t;
ec2aa11d 949 time_t dt;
83f2a3aa 950 char snapts[32];
46137e17 951 uint32_t i;
83f2a3aa
MD
952
953 bzero(&snapshot, sizeof(snapshot));
954 bzero(&dsnapshot, sizeof(dsnapshot));
955 do {
f254e677 956 if (ioctl(fd, HAMMERIOC_GET_SNAPSHOT, &snapshot) < 0) {
83f2a3aa
MD
957 err(2, "hammer cleanup: check_softlink "
958 "snapshot error");
f254e677
TK
959 /* not reached */
960 }
83f2a3aa
MD
961 for (i = 0; i < snapshot.count; ++i) {
962 snap = &snapshot.snaps[i];
ec2aa11d
MD
963 t = snap->ts / 1000000ULL;
964 dt = time(NULL) - t;
f254e677 965 if ((int)dt > arg2 || snap->tid == 0) {
83f2a3aa
MD
966 dsnapshot.snaps[dsnapshot.count++] =
967 *snap;
f254e677 968 }
ec2aa11d 969 if ((int)dt > arg2 && VerboseOpt) {
83f2a3aa
MD
970 tp = localtime(&t);
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,
975 snapts,
976 snap->label);
977 }
ec2aa11d
MD
978 if (dsnapshot.count == HAMMER_SNAPS_PER_IOCTL)
979 delete_snapshots(fd, &dsnapshot);
83f2a3aa
MD
980 }
981 } while (snapshot.head.error == 0 && snapshot.count);
982
ec2aa11d
MD
983 if (dsnapshot.count)
984 delete_snapshots(fd, &dsnapshot);
985 }
986}
987
005a4da7
TK
988static
989void
ec2aa11d
MD
990delete_snapshots(int fd, struct hammer_ioc_snapshot *dsnapshot)
991{
992 for (;;) {
993 if (ioctl(fd, HAMMERIOC_DEL_SNAPSHOT, dsnapshot) < 0) {
994 printf(" Ioctl to delete snapshots failed: %s\n",
995 strerror(errno));
996 break;
83f2a3aa 997 }
ec2aa11d
MD
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)
1004 continue;
1005 }
1006 break;
83f2a3aa 1007 }
ec2aa11d
MD
1008 dsnapshot->index = 0;
1009 dsnapshot->count = 0;
1010 dsnapshot->head.error = 0;
ff1c9800
MD
1011}
1012
1013/*
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
1016 * has expired.
1017 */
005a4da7
TK
1018static
1019int
ff1c9800
MD
1020check_expired(const char *fpath, int arg2)
1021{
1022 struct tm tm;
1023 time_t t;
1024 int year;
1025 int month;
5e435c92
MD
1026 int day = 0;
1027 int hour = 0;
1028 int minute = 0;
ff1c9800
MD
1029 int r;
1030
5e435c92
MD
1031 while (*fpath && *fpath != '-' && *fpath != '.')
1032 ++fpath;
1033 if (*fpath)
1034 ++fpath;
1035
1036 r = sscanf(fpath, "%4d%2d%2d-%2d%2d",
ff1c9800 1037 &year, &month, &day, &hour, &minute);
5e435c92
MD
1038
1039 if (r >= 3) {
ff1c9800
MD
1040 bzero(&tm, sizeof(tm));
1041 tm.tm_isdst = -1;
1042 tm.tm_min = minute;
1043 tm.tm_hour = hour;
1044 tm.tm_mday = day;
1045 tm.tm_mon = month - 1;
1046 tm.tm_year = year - 1900;
5e435c92
MD
1047 t = mktime(&tm);
1048 if (t == (time_t)-1)
1049 return(0);
1050 t = time(NULL) - t;
ff1c9800
MD
1051 if ((int)t > arg2)
1052 return(1);
1053 }
1054 return(0);
1055}
1056
6a6e350f
MD
1057/*
1058 * Issue a snapshot.
1059 */
005a4da7
TK
1060static
1061int
b5ec5ad4 1062create_snapshot(const char *path, const char *snapshots_path)
6a6e350f
MD
1063{
1064 int r;
1065
b5ec5ad4 1066 runcmd(&r, "hammer snapshot %s %s", path, snapshots_path);
6a6e350f
MD
1067 return(r);
1068}
1069
005a4da7
TK
1070static
1071int
eb5751f6 1072cleanup_prune(const char *path, const char *snapshots_path,
c6c298a7 1073 int arg1 __unused, int arg2, int snapshots_disabled)
6a6e350f 1074{
eb5751f6 1075 const char *path_or_snapshots_path;
eb5751f6
MD
1076
1077 /*
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.
1082 */
ce6ddec9
TK
1083 if (hammer_softprune_testdir(snapshots_path))
1084 path_or_snapshots_path = snapshots_path;
1085 else
1086 path_or_snapshots_path = path;
eb5751f6 1087
c6c298a7
MD
1088 /*
1089 * If snapshots have been disabled run prune-everything instead
1090 * of prune.
1091 */
f254e677 1092 if (snapshots_disabled && arg2) {
eb5751f6
MD
1093 runcmd(NULL,
1094 "hammer -c %s/.prune.cycle -t %d prune-everything %s",
1095 snapshots_path, arg2, path);
f254e677 1096 } else if (snapshots_disabled) {
c6c298a7 1097 runcmd(NULL, "hammer prune-everything %s", path);
f254e677 1098 } else if (arg2) {
6a6e350f 1099 runcmd(NULL, "hammer -c %s/.prune.cycle -t %d prune %s",
eb5751f6 1100 snapshots_path, arg2, path_or_snapshots_path);
f254e677 1101 } else {
eb5751f6 1102 runcmd(NULL, "hammer prune %s", path_or_snapshots_path);
f254e677 1103 }
6a6e350f
MD
1104 return(0);
1105}
1106
005a4da7
TK
1107static
1108int
0b8bd7da
MD
1109cleanup_rebalance(const char *path, const char *snapshots_path,
1110 int arg1 __unused, int arg2)
1111{
1112 if (VerboseOpt == 0) {
1113 printf(".");
1114 fflush(stdout);
1115 }
1116
1117 runcmd(NULL,
1118 "hammer -c %s/.rebalance.cycle -t %d rebalance %s",
1119 snapshots_path, arg2, path);
1120 if (VerboseOpt == 0) {
1121 printf(".");
1122 fflush(stdout);
1123 }
1124 if (VerboseOpt == 0)
1125 printf("\n");
1126 return(0);
1127}
1128
005a4da7
TK
1129static
1130int
6a6e350f
MD
1131cleanup_reblock(const char *path, const char *snapshots_path,
1132 int arg1 __unused, int arg2)
1133{
1134 if (VerboseOpt == 0) {
1135 printf(".");
1136 fflush(stdout);
1137 }
797a0b63
MD
1138
1139 /*
1140 * When reblocking the B-Tree always reblock everything in normal
1141 * mode.
1142 */
1143 runcmd(NULL,
1144 "hammer -c %s/.reblock-1.cycle -t %d reblock-btree %s",
1145 snapshots_path, arg2, path);
1146 if (VerboseOpt == 0) {
1147 printf(".");
1148 fflush(stdout);
1149 }
1150
1151 /*
1152 * When reblocking the inodes always reblock everything in normal
1153 * mode.
1154 */
6a6e350f 1155 runcmd(NULL,
797a0b63 1156 "hammer -c %s/.reblock-2.cycle -t %d reblock-inodes %s",
6a6e350f
MD
1157 snapshots_path, arg2, path);
1158 if (VerboseOpt == 0) {
1159 printf(".");
1160 fflush(stdout);
1161 }
797a0b63
MD
1162
1163 /*
1164 * When reblocking the directories always reblock everything in normal
1165 * mode.
1166 */
6a6e350f 1167 runcmd(NULL,
797a0b63 1168 "hammer -c %s/.reblock-4.cycle -t %d reblock-dirs %s",
6a6e350f
MD
1169 snapshots_path, arg2, path);
1170 if (VerboseOpt == 0) {
1171 printf(".");
1172 fflush(stdout);
1173 }
797a0b63
MD
1174
1175 /*
1176 * Do not reblock all the data in normal mode.
1177 */
6a6e350f
MD
1178 runcmd(NULL,
1179 "hammer -c %s/.reblock-3.cycle -t %d reblock-data %s 95",
1180 snapshots_path, arg2, path);
1181 if (VerboseOpt == 0)
1182 printf("\n");
1183 return(0);
1184}
1185
005a4da7
TK
1186static
1187int
6a6e350f
MD
1188cleanup_recopy(const char *path, const char *snapshots_path,
1189 int arg1 __unused, int arg2)
1190{
1191 if (VerboseOpt == 0) {
1192 printf(".");
1193 fflush(stdout);
1194 }
1195 runcmd(NULL,
1196 "hammer -c %s/.recopy-1.cycle -t %d reblock-btree %s",
1197 snapshots_path, arg2, path);
1198 if (VerboseOpt == 0) {
1199 printf(".");
1200 fflush(stdout);
1201 }
1202 runcmd(NULL,
1203 "hammer -c %s/.recopy-2.cycle -t %d reblock-inodes %s",
1204 snapshots_path, arg2, path);
1205 if (VerboseOpt == 0) {
1206 printf(".");
1207 fflush(stdout);
1208 }
797a0b63
MD
1209 runcmd(NULL,
1210 "hammer -c %s/.recopy-4.cycle -t %d reblock-dirs %s",
1211 snapshots_path, arg2, path);
1212 if (VerboseOpt == 0) {
1213 printf(".");
1214 fflush(stdout);
1215 }
6a6e350f
MD
1216 runcmd(NULL,
1217 "hammer -c %s/.recopy-3.cycle -t %d reblock-data %s",
1218 snapshots_path, arg2, path);
1219 if (VerboseOpt == 0)
1220 printf("\n");
1221 return(0);
1222}
1223
005a4da7
TK
1224static
1225int
bb29b5d8
MD
1226cleanup_dedup(const char *path, const char *snapshots_path __unused,
1227 int arg1 __unused, int arg2)
1228{
1229 if (VerboseOpt == 0) {
1230 printf(".");
1231 fflush(stdout);
1232 }
1233
1234 runcmd(NULL, "hammer -t %d dedup %s", arg2, path);
1235 if (VerboseOpt == 0) {
1236 printf(".");
1237 fflush(stdout);
1238 }
1239 if (VerboseOpt == 0)
1240 printf("\n");
1241 return(0);
1242}
1243
6a6e350f
MD
1244static
1245void
1246runcmd(int *resp, const char *ctl, ...)
1247{
1248 va_list va;
1249 char *cmd;
1250 char *arg;
1251 char **av;
1252 int n;
1253 int nmax;
1254 int res;
1255 pid_t pid;
1256
1257 /*
1258 * Generate the command
1259 */
1260 va_start(va, ctl);
1261 vasprintf(&cmd, ctl, va);
1262 va_end(va);
1263 if (VerboseOpt)
1264 printf(" %s\n", cmd);
1265
1266 /*
1267 * Break us down into arguments. We do not just use system() here
1268 * because it blocks SIGINT and friends.
1269 */
1270 n = 0;
1271 nmax = 16;
1272 av = malloc(sizeof(char *) * nmax);
1273
1274 for (arg = strtok(cmd, WS); arg; arg = strtok(NULL, WS)) {
c453712a 1275 if (n == nmax - 1) {
6a6e350f
MD
1276 nmax += 16;
1277 av = realloc(av, sizeof(char *) * nmax);
1278 }
1279 av[n++] = arg;
1280 }
c453712a 1281 av[n++] = NULL;
6a6e350f
MD
1282
1283 /*
1284 * Run the command.
1285 */
445faa69 1286 RunningIoctl = 1;
6a6e350f
MD
1287 if ((pid = fork()) == 0) {
1288 if (VerboseOpt < 2) {
1289 int fd = open("/dev/null", O_RDWR);
1290 dup2(fd, 1);
1291 close(fd);
1292 }
1293 execvp(av[0], av);
1294 _exit(127);
1295 } else if (pid < 0) {
1296 res = 127;
1297 } else {
1298 int status;
445faa69 1299
6a6e350f
MD
1300 while (waitpid(pid, &status, 0) != pid)
1301 ;
1302 res = WEXITSTATUS(status);
1303 }
445faa69
MD
1304 RunningIoctl = 0;
1305 if (DidInterrupt)
1306 _exit(1);
6a6e350f
MD
1307
1308 free(cmd);
1309 free(av);
1310 if (resp)
1311 *resp = res;
1312}