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/Attic/cmd_prune.c,v 1.4 2008/03/20 04:03:03 dillon Exp $
39 static void hammer_prune_load_file(hammer_tid_t now_tid,
40 struct hammer_ioc_prune *prune,
41 const char *filesystem, const char *filename);
42 static int hammer_prune_parse_line(hammer_tid_t now_tid,
43 struct hammer_ioc_prune *prune,
44 const char *filesystem, char **av, int ac);
45 static void hammer_prune_create_links(const char *filesystem,
46 struct hammer_ioc_prune *prune);
47 static void hammer_prune_make_softlink(const char *filesystem,
49 static int parse_modulo_time(const char *str, u_int64_t *delta);
50 static char *tid_to_stamp_str(hammer_tid_t tid);
51 static void prune_usage(int code);
54 * prune <filesystem> from <modulo_time> to <modulo_time> every <modulo_time>
55 * prune <filesystem> [using <filename>]
58 hammer_cmd_prune(char **av, int ac)
60 struct hammer_ioc_prune prune;
61 const char *filesystem;
63 hammer_tid_t now_tid = (hammer_tid_t)time(NULL) * 1000000000LL;
65 bzero(&prune, sizeof(prune));
67 prune.beg_obj_id = HAMMER_MIN_OBJID;
68 prune.end_obj_id = HAMMER_MAX_OBJID;
69 prune.cur_obj_id = prune.end_obj_id; /* reverse scan */
70 prune.cur_key = HAMMER_MAX_KEY;
71 prune.stat_oldest_tid = HAMMER_MAX_TID;
77 hammer_prune_load_file(now_tid, &prune, filesystem,
79 } else if (strcmp(av[1], "using") == 0) {
82 hammer_prune_load_file(now_tid, &prune, filesystem, av[2]);
83 } else if (strcmp(av[1], "everything") == 0) {
84 prune.flags |= HAMMER_IOC_PRUNE_ALL;
88 if (hammer_prune_parse_line(now_tid, &prune, filesystem,
93 fd = open(filesystem, O_RDONLY);
95 err(1, "Unable to open %s", filesystem);
96 if (ioctl(fd, HAMMERIOC_PRUNE, &prune) < 0)
97 printf("Prune %s failed: %s\n", filesystem, strerror(errno));
99 printf("Prune %s succeeded\n", filesystem);
102 hammer_prune_create_links(filesystem, &prune);
103 printf("Pruned %lld records (%lld directory entries) and %lld bytes\n",
104 prune.stat_rawrecords,
105 prune.stat_dirrecords,
111 hammer_prune_load_file(hammer_tid_t now_tid, struct hammer_ioc_prune *prune,
112 const char *filesystem, const char *filename)
120 if ((fp = fopen(filename, "r")) == NULL)
121 err(1, "Unable to read %s", filename);
123 while (fgets(buf, sizeof(buf), fp) != NULL) {
125 if (strncmp(buf, "prune", 5) != 0)
128 av[ac] = strtok(buf, " \t\r\n");
129 while (av[ac] != NULL) {
133 errx(1, "Malformed prune directive in %s "
134 "line %d\n", filename, lineno);
136 av[ac] = strtok(NULL, " \t\r\n");
140 if (strcmp(av[0], "prune") != 0)
142 if (hammer_prune_parse_line(now_tid, prune, filesystem,
143 av + 1, ac - 1) < 0) {
144 errx(1, "Malformed prune directive in %s line %d\n",
153 plural(int notplural)
155 return(notplural ? "" : "s");
159 * Parse the following parameters:
161 * <filesystem> from <modulo_time> to <modulo_time> every <modulo_time>
164 hammer_prune_parse_line(hammer_tid_t now_tid, struct hammer_ioc_prune *prune,
165 const char *filesystem, char **av, int ac)
167 struct hammer_ioc_prune_elm *elm;
170 u_int64_t every_time;
171 char *from_stamp_str;
176 if (strcmp(av[0], filesystem) != 0)
178 if (strcmp(av[1], "from") != 0)
180 if (strcmp(av[3], "to") != 0)
182 if (strcmp(av[5], "every") != 0)
184 if (parse_modulo_time(av[2], &from_time) < 0)
186 if (parse_modulo_time(av[4], &to_time) < 0)
188 if (parse_modulo_time(av[6], &every_time) < 0)
190 if (from_time > to_time)
192 if (from_time == 0 || to_time == 0) {
193 fprintf(stderr, "Bad from or to time specification.\n");
196 if (to_time % from_time != 0) {
197 fprintf(stderr, "Bad TO time specification.\n"
198 "It must be an integral multiple of FROM time\n");
201 if (every_time == 0 ||
202 from_time % every_time != 0 ||
203 to_time % every_time != 0) {
204 fprintf(stderr, "Bad 'every <modulo_time>' specification.\n"
205 "It must be an integral subdivision of FROM and TO\n");
208 if (prune->nelms == HAMMER_MAX_PRUNE_ELMS) {
209 fprintf(stderr, "Too many prune specifications in file! "
210 "Max is %d\n", HAMMER_MAX_PRUNE_ELMS);
215 * Example: from 1m to 60m every 5m
217 elm = &prune->elms[prune->nelms++];
218 elm->beg_tid = now_tid - now_tid % to_time;
219 if (now_tid - elm->beg_tid < to_time)
220 elm->beg_tid -= to_time;
222 elm->end_tid = now_tid - now_tid % from_time;
223 if (now_tid - elm->end_tid < from_time)
224 elm->end_tid -= from_time;
226 elm->mod_tid = every_time;
227 assert(elm->beg_tid < elm->end_tid);
230 * Convert back to local time for pretty printing
232 from_stamp_str = tid_to_stamp_str(elm->beg_tid);
233 to_stamp_str = tid_to_stamp_str(elm->end_tid);
234 printf("Prune %s to %s every ", from_stamp_str, to_stamp_str);
236 every_time /= 1000000000;
238 printf("%lld second%s\n", every_time, plural(every_time == 1));
240 if (every_time && every_time < 60)
241 printf("%lld minute%s\n", every_time, plural(every_time == 1));
243 if (every_time && every_time < 24)
244 printf("%lld hour%s\n", every_time, plural(every_time == 1));
247 printf("%lld day%s\n", every_time, plural(every_time == 1));
249 free(from_stamp_str);
255 * Create softlinks in the form $linkpath/snap_ddmmmyyyy[_hhmmss]
258 hammer_prune_create_links(const char *filesystem,
259 struct hammer_ioc_prune *prune)
261 struct hammer_ioc_prune_elm *elm;
267 if ((dir = opendir(LinkPath)) == NULL) {
268 fprintf(stderr, "Unable to access linkpath %s\n", LinkPath);
271 while ((den = readdir(dir)) != NULL) {
272 if (strncmp(den->d_name, "snap-", 5) == 0) {
273 asprintf(&path, "%s/%s", LinkPath, den->d_name);
280 for (elm = &prune->elms[0]; elm < &prune->elms[prune->nelms]; ++elm) {
281 for (tid = elm->beg_tid;
283 tid += elm->mod_tid) {
284 if (tid < prune->stat_oldest_tid)
286 hammer_prune_make_softlink(filesystem, tid);
292 hammer_prune_make_softlink(const char *filesystem, hammer_tid_t tid)
300 t = (time_t)(tid / 1000000000);
304 * Construct the contents of the softlink.
306 asprintf(&target, "%s/@@0x%016llx", filesystem, tid);
309 * Construct the name of the snap-shot softlink
311 if (tid % (1000000000ULL * 60 * 60 * 24) == 0) {
312 strftime(buf, sizeof(buf), "snap-%d%b%Y", tp);
313 } else if (tid % (1000000000ULL * 60 * 60) == 0) {
314 strftime(buf, sizeof(buf), "snap-%d%b%Y_%H", tp);
315 } else if (tid % (1000000000ULL * 60) == 0) {
316 strftime(buf, sizeof(buf), "snap-%d%b%Y_%H%M", tp);
318 strftime(buf, sizeof(buf), "snap-%d%b%Y_%H%M%S", tp);
321 asprintf(&path, "%s/%s", LinkPath, buf);
322 symlink(target, path);
329 parse_modulo_time(const char *str, u_int64_t *delta)
333 *delta = strtoull(str, &term, 10);
356 *delta *= 1000000000LL; /* TID's are in nanoseconds */
361 tid_to_stamp_str(hammer_tid_t tid)
364 char *buf = malloc(256);
367 t = (time_t)(tid / 1000000000);
369 strftime(buf, 256, "%e-%b-%Y %H:%M:%S %Z", tp);
374 prune_usage(int code)
376 fprintf(stderr, "Bad prune directive, specify one of:\n"
377 "prune filesystem [using filename]\n"
378 "prune filesystem from <modulo_time> to <modulo_time> every <modulo_time>\n");