HAMMER Utilities: Feature add
[dragonfly.git] / sbin / hammer / hammer.c
1 /*
2  * Copyright (c) 2007 The DragonFly Project.  All rights reserved.
3  * 
4  * This code is derived from software contributed to The DragonFly Project
5  * by Matthew Dillon <dillon@backplane.com>
6  * 
7  * Redistribution and use in source and binary forms, with or without
8  * modification, are permitted provided that the following conditions
9  * are met:
10  * 
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.
20  * 
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.
33  * 
34  * $DragonFly: src/sbin/hammer/hammer.c,v 1.15 2008/05/10 17:54:59 dillon Exp $
35  */
36
37 #include "hammer.h"
38 #include <signal.h>
39 #include <math.h>
40
41 static void hammer_parsetime(u_int64_t *tidp, const char *timestr);
42 static void hammer_waitsync(int dosleep);
43 static void hammer_parsedevs(const char *blkdevs);
44 static void sigalrm(int signo);
45 static void usage(int exit_code);
46
47 int RecurseOpt;
48 int VerboseOpt;
49 int NoSyncOpt;
50 const char *LinkPath;
51
52 int
53 main(int ac, char **av)
54 {
55         struct timeval tv;
56         u_int64_t tid;
57         int ch;
58         int timeout = 0;
59         u_int32_t status;
60         char *blkdevs = NULL;
61
62         while ((ch = getopt(ac, av, "hf:rs:t:vx")) != -1) {
63                 switch(ch) {
64                 case 'h':
65                         usage(0);
66                         /* not reached */
67                 case 'r':
68                         RecurseOpt = 1;
69                         break;
70                 case 'f':
71                         blkdevs = optarg;
72                         break;
73                 case 's':
74                         LinkPath = optarg;
75                         break;
76                 case 't':
77                         timeout = strtol(optarg, NULL, 0);
78                         break;
79                 case 'v':
80                         ++VerboseOpt;
81                         break;
82                 case 'x':
83                         ++NoSyncOpt;
84                         break;
85                 default:
86                         usage(1);
87                         /* not reached */
88                 }
89         }
90         ac -= optind;
91         av += optind;
92         if (ac < 1) {
93                 usage(1);
94                 /* not reached */
95         }
96
97         if (timeout > 0) {
98                 signal(SIGALRM, sigalrm);
99                 alarm(timeout);
100         }
101
102         if (strcmp(av[0], "now") == 0) {
103                 hammer_waitsync(1);
104                 tid = (hammer_tid_t)time(NULL) * 1000000000LLU;
105                 printf("0x%08x\n", (int)(tid / 1000000000LL));
106                 exit(0);
107         }
108         if (strcmp(av[0], "now64") == 0) {
109                 hammer_waitsync(0);
110                 gettimeofday(&tv, NULL);
111                 tid = (hammer_tid_t)tv.tv_sec * 1000000000LLU +
112                         tv.tv_usec * 1000LLU;
113                 printf("0x%016llx\n", tid);
114                 exit(0);
115         }
116         if (strcmp(av[0], "stamp") == 0) {
117                 if (av[1] == NULL)
118                         usage(1);
119                 hammer_parsetime(&tid, av[1]);
120                 printf("0x%08x\n", (int)(tid / 1000000000LL));
121                 exit(0);
122         }
123         if (strcmp(av[0], "stamp64") == 0) {
124                 if (av[1] == NULL)
125                         usage(1);
126                 hammer_parsetime(&tid, av[1]);
127                 printf("0x%016llx\n", tid);
128                 exit(0);
129         }
130         if (strcmp(av[0], "namekey") == 0) {
131                 int64_t key;
132
133                 if (av[1] == NULL)
134                         usage(1);
135                 key = (int64_t)(crc32(av[1], strlen(av[1])) & 0x7FFFFFFF) << 32;
136                 if (key == 0)
137                         key |= 0x100000000LL;
138                 printf("0x%016llx\n", key);
139                 exit(0);
140         }
141         if (strcmp(av[0], "namekey32") == 0) {
142                 int32_t key;
143
144                 if (av[1] == NULL)
145                         usage(1);
146                 key = crc32(av[1], strlen(av[1])) & 0x7FFFFFFF;
147                 if (key == 0)
148                         ++key;
149                 printf("0x%08x\n", key);
150                 exit(0);
151         }
152         if (strcmp(av[0], "prune") == 0) {
153                 hammer_cmd_prune(av + 1, ac - 1);
154                 exit(0);
155         }
156
157         if (strncmp(av[0], "history", 7) == 0) {
158                 hammer_cmd_history(av[0] + 7, av + 1, ac - 1);
159                 exit(0);
160         }
161         if (strcmp(av[0], "reblock") == 0) {
162                 hammer_cmd_reblock(av + 1, ac - 1);
163                 exit(0);
164         }
165
166         uuid_name_lookup(&Hammer_FSType, "DragonFly HAMMER", &status);
167         if (status != uuid_s_ok) {
168                 errx(1, "uuids file does not have the DragonFly "
169                         "HAMMER filesystem type");
170         }
171
172         if (strcmp(av[0], "show") == 0) {
173                 hammer_off_t node_offset = (hammer_off_t)-1;
174
175                 hammer_parsedevs(blkdevs);
176                 if (ac > 1)
177                         sscanf(av[1], "%llx", &node_offset);
178                 hammer_cmd_show(node_offset, 0, NULL, NULL);
179                 exit(0);
180         }
181         if (strcmp(av[0], "blockmap") == 0) {
182                 hammer_parsedevs(blkdevs);
183                 hammer_cmd_blockmap();
184                 exit(0);
185         }
186         usage(1);
187         /* not reached */
188         return(0);
189 }
190
191 /*
192  * Parse a timestamp for the mount point
193  *
194  * yyyymmddhhmmss
195  * -N[s/h/d/m/y]
196  */
197 static
198 void
199 hammer_parsetime(u_int64_t *tidp, const char *timestr)
200 {
201         struct timeval tv;
202         struct tm tm;
203         int32_t n;
204         char c;
205
206         gettimeofday(&tv, NULL);
207
208         if (*timestr == 0)
209                 usage(1);
210
211         if (isalpha(timestr[strlen(timestr)-1])) {
212                 if (sscanf(timestr, "%d%c", &n, &c) != 2)
213                         usage(1);
214                 switch(c) {
215                 case 'Y':
216                         n *= 365;
217                         goto days;
218                 case 'M':
219                         n *= 30;
220                         /* fall through */
221                 case 'D':
222                 days:
223                         n *= 24;
224                         /* fall through */
225                 case 'h':
226                         n *= 60;
227                         /* fall through */
228                 case 'm':
229                         n *= 60;
230                         /* fall through */
231                 case 's':
232                         tv.tv_sec -= n;
233                         break;
234                 default:
235                         usage(1);
236                 }
237         } else {
238                 double seconds = 0;
239
240                 localtime_r(&tv.tv_sec, &tm);
241                 seconds = (double)tm.tm_sec;
242                 tm.tm_year += 1900;
243                 tm.tm_mon += 1;
244                 n = sscanf(timestr, "%4d%2d%2d:%2d%2d%lf",
245                            &tm.tm_year, &tm.tm_mon, &tm.tm_mday,
246                            &tm.tm_hour, &tm.tm_min, &seconds);
247                 tm.tm_mon -= 1;
248                 tm.tm_year -= 1900;
249                 /* if [:hhmmss] is omitted, assume :000000.0 */
250                 if (n < 4)
251                         tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
252                 else
253                         tm.tm_sec = (int)seconds;
254                 tv.tv_sec = mktime(&tm);
255                 tv.tv_usec = (int)((seconds - floor(seconds)) * 1000000.0);
256         }
257         *tidp = (u_int64_t)tv.tv_sec * 1000000000LLU + 
258                 tv.tv_usec * 1000LLU;
259 }
260
261 /*
262  * If the TID is within 60 seconds of the current time we sync().  If
263  * dosleep is non-zero and the TID is within 1 second of the current time
264  * we wait for the second-hand to turn over.
265  *
266  * The NoSyncOpt prevents both the sync() call and any sleeps from occuring.
267  */
268 static
269 void
270 hammer_waitsync(int dosleep)
271 {
272         time_t t1, t2;
273
274         if (NoSyncOpt == 0) {
275                 sync();
276                 t1 = t2 = time(NULL);
277                 while (dosleep && t1 == t2) {
278                         usleep(100000);
279                         t2 = time(NULL);
280                 }
281         }
282 }
283
284 static
285 void
286 hammer_parsedevs(const char *blkdevs)
287 {
288         char *copy;
289         char *volname;
290
291         if (blkdevs == NULL) {
292                 errx(1, "A -f blkdevs specification is required "
293                         "for this command");
294         }
295
296         copy = strdup(blkdevs);
297         while ((volname = copy) != NULL) {
298                 if ((copy = strchr(copy, ':')) != NULL)
299                         *copy++ = 0;
300                 setup_volume(-1, volname, 0, O_RDONLY);
301         }
302 }
303
304 static
305 void
306 sigalrm(int signo __unused)
307 {
308         /* do nothing (interrupts HAMMER ioctl) */
309 }
310
311 static
312 void
313 usage(int exit_code)
314 {
315         fprintf(stderr, 
316                 "hammer -h\n"
317                 "hammer [-x] now[64]\n"
318                 "hammer stamp[64] <time>\n"
319                 "hammer [-s linkpath] prune <filesystem> [using <configfile>]\n"
320                 "hammer [-s linkpath] prune <filesystem> from <modulo_time> to "
321                                 "<modulo_time> every <modulo_time>\n"
322                 "hammer prune <filesystem> from <modulo_time> everything\n"
323                 "hammer prune <filesystem> everything\n"
324                 "hammer reblock <filesystem> [compact%%] (default 90%%)\n"
325                 "hammer history[@offset[,len]] <file-1>...<file-N>\n"
326                 "hammer -f blkdevs [-r] show\n"
327                 "hammer -f blkdevs blockmap\n"
328         );
329         fprintf(stderr, "time: +n[s/m/h/D/M/Y]\n"
330                         "time: yyyymmdd[:hhmmss]\n"
331                         "modulo_time: n{s,m,h,d,M,y}\n");
332         exit(exit_code);
333 }
334