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 1.6 2008/01/25 05:53:41 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
 115         uuid_name_lookup(&Hammer_FSType, "DragonFly HAMMER", &status);
 116         if (status != uuid_s_ok) {
 117                 errx(1, "uuids file does not have the DragonFly "
 118                         "HAMMER filesystem type");
 119         }
 120
 121         init_alist_templates();
 122         if (strcmp(av[0], "show") == 0) {
 123                 int32_t vol_no = -1;
 124                 int32_t clu_no = -1;
 125
 126                 hammer_parsedevs(blkdevs);
 127                 if (ac > 1)
 128                         sscanf(av[1], "%d:%d", &vol_no, &clu_no);
 129                 hammer_cmd_show(vol_no, clu_no, 0);
 130                 exit(0);
 131         }
 132         usage(1);
 133         /* not reached */
 134         return(0);
 135 }
 136
 137 /*
 138  * Parse a timestamp for the mount point
 139  *
 140  * yyyymmddhhmmss
 141  * -N[s/h/d/m/y]
 142  */
 143 static
 144 void
 145 hammer_parsetime(u_int64_t *tidp, const char *timestr)
 146 {
 147         struct tm tm;
 148         time_t t;
 149         int32_t n;
 150         char c;
 151         double seconds = 0;
 152
 153         t = time(NULL);
 154
 155         if (*timestr == 0)
 156                 usage(1);
 157
 158         if (isalpha(timestr[strlen(timestr)-1])) {
 159                 if (sscanf(timestr, "%d%c", &n, &c) != 2)
 160                         usage(1);
 161                 switch(c) {
 162                 case 'Y':
 163                         n *= 365;
 164                         goto days;
 165                 case 'M':
 166                         n *= 30;
 167                         /* fall through */
 168                 case 'D':
 169                 days:
 170                         n *= 24;
 171                         /* fall through */
 172                 case 'h':
 173                         n *= 60;
 174                         /* fall through */
 175                 case 'm':
 176                         n *= 60;
 177                         /* fall through */
 178                 case 's':
 179                         t -= n;
 180                         break;
 181                 default:
 182                         usage(1);
 183                 }
 184         } else {
 185                 localtime_r(&t, &tm);
 186                 seconds = (double)tm.tm_sec;
 187                 tm.tm_year += 1900;
 188                 tm.tm_mon += 1;
 189                 n = sscanf(timestr, "%4d%2d%2d:%2d%2d%lf",
 190                            &tm.tm_year, &tm.tm_mon, &tm.tm_mday,
 191                            &tm.tm_hour, &tm.tm_min, &seconds);
 192                 tm.tm_mon -= 1;
 193                 tm.tm_year -= 1900;
 194                 /* if [:hhmmss] is omitted, assume :000000.0 */
 195                 if (n < 4)
 196                         tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
 197                 else
 198                         tm.tm_sec = (int)seconds;
 199                 t = mktime(&tm);
 200         }
 201         *tidp = (u_int64_t)t * 1000000000 +
 202                 (seconds - (int)seconds) * 1000000000;
 203 }
 204
 205 static
 206 void
 207 hammer_parsedevs(const char *blkdevs)
 208 {
 209         char *copy;
 210         char *volname;
 211
 212         if (blkdevs == NULL) {
 213                 errx(1, "A -f blkdevs specification is required "
 214                         "for this command");
 215         }
 216
 217         copy = strdup(blkdevs);
 218         while ((volname = copy) != NULL) {
 219                 if ((copy = strchr(copy, ':')) != NULL)
 220                         *copy++ = 0;
 221                 setup_volume(-1, volname, 0, O_RDONLY);
 222         }
 223 }
 224
 225 static
 226 void
 227 usage(int exit_code)
 228 {
 229         fprintf(stderr,
 230                 "hammer -h\n"
 231                 "hammer now\n"
 232                 "hammer stamp <time>\n"
 233                 "hammer -f blkdevs [-r] show [vol_no[:clu_no]]\n"
 234         );
 235         fprintf(stderr, "    time: +n[s/m/h/D/M/Y]\n"
 236                         "    time: yyyymmdd[:hhmmss]\n");
 237         exit(exit_code);
 238 }
 239