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 1.7 2008/02/04 08:34:22 dillon Exp $
  35  */
  36
  37 #include "hammer.h"
  38
  39 static void hammer_parsetime(u_int64_t *tidp, const char *timestr);
  40 static void hammer_parsedevs(const char *blkdevs);
  41 static void usage(int exit_code);
  42
  43 int RecurseOpt;
  44 int VerboseOpt;
  45
  46 int
  47 main(int ac, char **av)
  48 {
  49         u_int64_t tid;
  50         int ch;
  51         int status;
  52         char *blkdevs = NULL;
  53
  54         while ((ch = getopt(ac, av, "hf:rv")) != -1) {
  55                 switch(ch) {
  56                 case 'h':
  57                         usage(0);
  58                         /* not reached */
  59                 case 'r':
  60                         RecurseOpt = 1;
  61                         break;
  62                 case 'f':
  63                         blkdevs = optarg;
  64                         break;
  65                 case 'v':
  66                         ++VerboseOpt;
  67                         break;
  68                 default:
  69                         usage(1);
  70                         /* not reached */
  71                 }
  72         }
  73         ac -= optind;
  74         av += optind;
  75         if (ac < 1) {
  76                 usage(1);
  77                 /* not reached */
  78         }
  79
  80         if (strcmp(av[0], "now") == 0) {
  81                 hammer_parsetime(&tid, "0s");
  82                 printf("0x%08x\n", (int)(tid / 1000000000LL));
  83                 exit(0);
  84         }
  85         if (strcmp(av[0], "stamp") == 0) {
  86                 if (av[1] == NULL)
  87                         usage(1);
  88                 hammer_parsetime(&tid, av[1]);
  89                 printf("0x%08x\n", (int)(tid / 1000000000LL));
  90                 exit(0);
  91         }
  92         if (strcmp(av[0], "namekey") == 0) {
  93                 int64_t key;
  94
  95                 if (av[1] == NULL)
  96                         usage(1);
  97                 key = (int64_t)(crc32(av[1], strlen(av[1])) & 0x7FFFFFFF) << 32;
  98                 if (key == 0)
  99                         key |= 0x100000000LL;
 100                 printf("0x%016llx\n", key);
 101                 exit(0);
 102         }
 103         if (strcmp(av[0], "namekey32") == 0) {
 104                 int32_t key;
 105
 106                 if (av[1] == NULL)
 107                         usage(1);
 108                 key = crc32(av[1], strlen(av[1])) & 0x7FFFFFFF;
 109                 if (key == 0)
 110                         ++key;
 111                 printf("0x%08x\n", key);
 112                 exit(0);
 113         }
 114         if (strcmp(av[0], "prune") == 0) {
 115                 hammer_cmd_prune(av + 1, ac - 1);
 116                 exit(0);
 117         }
 118
 119         if (strncmp(av[0], "history", 7) == 0) {
 120                 hammer_cmd_history(av[0] + 7, av + 1, ac - 1);
 121                 exit(0);
 122         }
 123
 124         uuid_name_lookup(&Hammer_FSType, "DragonFly HAMMER", &status);
 125         if (status != uuid_s_ok) {
 126                 errx(1, "uuids file does not have the DragonFly "
 127                         "HAMMER filesystem type");
 128         }
 129
 130         init_alist_templates();
 131         if (strcmp(av[0], "show") == 0) {
 132                 int32_t vol_no = -1;
 133                 int32_t clu_no = -1;
 134
 135                 hammer_parsedevs(blkdevs);
 136                 if (ac > 1)
 137                         sscanf(av[1], "%d:%d", &vol_no, &clu_no);
 138                 hammer_cmd_show(vol_no, clu_no, 0);
 139                 exit(0);
 140         }
 141         usage(1);
 142         /* not reached */
 143         return(0);
 144 }
 145
 146 /*
 147  * Parse a timestamp for the mount point
 148  *
 149  * yyyymmddhhmmss
 150  * -N[s/h/d/m/y]
 151  */
 152 static
 153 void
 154 hammer_parsetime(u_int64_t *tidp, const char *timestr)
 155 {
 156         struct tm tm;
 157         time_t t;
 158         int32_t n;
 159         char c;
 160         double seconds = 0;
 161
 162         t = time(NULL);
 163
 164         if (*timestr == 0)
 165                 usage(1);
 166
 167         if (isalpha(timestr[strlen(timestr)-1])) {
 168                 if (sscanf(timestr, "%d%c", &n, &c) != 2)
 169                         usage(1);
 170                 switch(c) {
 171                 case 'Y':
 172                         n *= 365;
 173                         goto days;
 174                 case 'M':
 175                         n *= 30;
 176                         /* fall through */
 177                 case 'D':
 178                 days:
 179                         n *= 24;
 180                         /* fall through */
 181                 case 'h':
 182                         n *= 60;
 183                         /* fall through */
 184                 case 'm':
 185                         n *= 60;
 186                         /* fall through */
 187                 case 's':
 188                         t -= n;
 189                         break;
 190                 default:
 191                         usage(1);
 192                 }
 193         } else {
 194                 localtime_r(&t, &tm);
 195                 seconds = (double)tm.tm_sec;
 196                 tm.tm_year += 1900;
 197                 tm.tm_mon += 1;
 198                 n = sscanf(timestr, "%4d%2d%2d:%2d%2d%lf",
 199                            &tm.tm_year, &tm.tm_mon, &tm.tm_mday,
 200                            &tm.tm_hour, &tm.tm_min, &seconds);
 201                 tm.tm_mon -= 1;
 202                 tm.tm_year -= 1900;
 203                 /* if [:hhmmss] is omitted, assume :000000.0 */
 204                 if (n < 4)
 205                         tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
 206                 else
 207                         tm.tm_sec = (int)seconds;
 208                 t = mktime(&tm);
 209         }
 210         *tidp = (u_int64_t)t * 1000000000 +
 211                 (seconds - (int)seconds) * 1000000000;
 212 }
 213
 214 static
 215 void
 216 hammer_parsedevs(const char *blkdevs)
 217 {
 218         char *copy;
 219         char *volname;
 220
 221         if (blkdevs == NULL) {
 222                 errx(1, "A -f blkdevs specification is required "
 223                         "for this command");
 224         }
 225
 226         copy = strdup(blkdevs);
 227         while ((volname = copy) != NULL) {
 228                 if ((copy = strchr(copy, ':')) != NULL)
 229                         *copy++ = 0;
 230                 setup_volume(-1, volname, 0, O_RDONLY);
 231         }
 232 }
 233
 234 static
 235 void
 236 usage(int exit_code)
 237 {
 238         fprintf(stderr,
 239                 "hammer -h\n"
 240                 "hammer now\n"
 241                 "hammer stamp <time>\n"
 242                 "hammer prune <filesystem> [using <configfile>]\n"
 243                 "hammer prune <filesystem> from <modulo_time> to <modulo_time> every <modulo_time>\n"
 244                 "hammer history[@offset[,len]] <file-1>...<file-N>\n"
 245                 "hammer -f blkdevs [-r] show [vol_no[:clu_no]]\n"
 246         );
 247         fprintf(stderr, "time: +n[s/m/h/D/M/Y]\n"
 248                         "time: yyyymmdd[:hhmmss]\n"
 249                         "modulo_time: n{s,m,h,d,M,y}\n");
 250         exit(exit_code);
 251 }
 252