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 1.5 2008/01/24 02:16:47 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
  45 int
  46 main(int ac, char **av)
  47 {
  48         u_int64_t tid;
  49         int ch;
  50         int status;
  51         char *blkdevs = NULL;
  52
  53         while ((ch = getopt(ac, av, "hf:r")) != -1) {
  54                 switch(ch) {
  55                 case 'h':
  56                         usage(0);
  57                         /* not reached */
  58                 case 'r':
  59                         RecurseOpt = 1;
  60                         break;
  61                 case 'f':
  62                         blkdevs = optarg;
  63                         break;
  64                 default:
  65                         usage(1);
  66                         /* not reached */
  67                 }
  68         }
  69         ac -= optind;
  70         av += optind;
  71         if (ac < 1) {
  72                 usage(1);
  73                 /* not reached */
  74         }
  75
  76         if (strcmp(av[0], "now") == 0) {
  77                 hammer_parsetime(&tid, "0s");
  78                 printf("0x%08x\n", (int)(tid / 1000000000LL));
  79                 exit(0);
  80         }
  81         if (strcmp(av[0], "stamp") == 0) {
  82                 if (av[1] == NULL)
  83                         usage(1);
  84                 hammer_parsetime(&tid, av[1]);
  85                 printf("0x%08x\n", (int)(tid / 1000000000LL));
  86                 exit(0);
  87         }
  88         if (strcmp(av[0], "namekey") == 0) {
  89                 int64_t key;
  90
  91                 if (av[1] == NULL)
  92                         usage(1);
  93                 key = (int64_t)(crc32(av[1], strlen(av[1])) & 0x7FFFFFFF) << 32;
  94                 if (key == 0)
  95                         key |= 0x100000000LL;
  96                 printf("0x%016llx\n", key);
  97                 exit(0);
  98         }
  99         if (strcmp(av[0], "namekey32") == 0) {
 100                 int32_t key;
 101
 102                 if (av[1] == NULL)
 103                         usage(1);
 104                 key = crc32(av[1], strlen(av[1])) & 0x7FFFFFFF;
 105                 if (key == 0)
 106                         ++key;
 107                 printf("0x%08x\n", key);
 108                 exit(0);
 109         }
 110
 111         uuid_name_lookup(&Hammer_FSType, "DragonFly HAMMER", &status);
 112         if (status != uuid_s_ok) {
 113                 errx(1, "uuids file does not have the DragonFly "
 114                         "HAMMER filesystem type");
 115         }
 116
 117         init_alist_templates();
 118         if (strcmp(av[0], "show") == 0) {
 119                 int32_t vol_no = -1;
 120                 int32_t clu_no = -1;
 121
 122                 hammer_parsedevs(blkdevs);
 123                 if (ac > 1)
 124                         sscanf(av[1], "%d:%d", &vol_no, &clu_no);
 125                 hammer_cmd_show(vol_no, clu_no, 0);
 126                 exit(0);
 127         }
 128         usage(1);
 129         /* not reached */
 130         return(0);
 131 }
 132
 133 /*
 134  * Parse a timestamp for the mount point
 135  *
 136  * yyyymmddhhmmss
 137  * -N[s/h/d/m/y]
 138  */
 139 static
 140 void
 141 hammer_parsetime(u_int64_t *tidp, const char *timestr)
 142 {
 143         struct tm tm;
 144         time_t t;
 145         int32_t n;
 146         char c;
 147         double seconds = 0;
 148
 149         t = time(NULL);
 150
 151         if (*timestr == 0)
 152                 usage(1);
 153
 154         if (isalpha(timestr[strlen(timestr)-1])) {
 155                 if (sscanf(timestr, "%d%c", &n, &c) != 2)
 156                         usage(1);
 157                 switch(c) {
 158                 case 'Y':
 159                         n *= 365;
 160                         goto days;
 161                 case 'M':
 162                         n *= 30;
 163                         /* fall through */
 164                 case 'D':
 165                 days:
 166                         n *= 24;
 167                         /* fall through */
 168                 case 'h':
 169                         n *= 60;
 170                         /* fall through */
 171                 case 'm':
 172                         n *= 60;
 173                         /* fall through */
 174                 case 's':
 175                         t -= n;
 176                         break;
 177                 default:
 178                         usage(1);
 179                 }
 180         } else {
 181                 localtime_r(&t, &tm);
 182                 seconds = (double)tm.tm_sec;
 183                 tm.tm_year += 1900;
 184                 tm.tm_mon += 1;
 185                 n = sscanf(timestr, "%4d%2d%2d:%2d%2d%lf",
 186                            &tm.tm_year, &tm.tm_mon, &tm.tm_mday,
 187                            &tm.tm_hour, &tm.tm_min, &seconds);
 188                 tm.tm_mon -= 1;
 189                 tm.tm_year -= 1900;
 190                 /* if [:hhmmss] is omitted, assume :000000.0 */
 191                 if (n < 4)
 192                         tm.tm_hour = tm.tm_min = tm.tm_sec = 0;
 193                 else
 194                         tm.tm_sec = (int)seconds;
 195                 t = mktime(&tm);
 196         }
 197         *tidp = (u_int64_t)t * 1000000000 +
 198                 (seconds - (int)seconds) * 1000000000;
 199 }
 200
 201 static
 202 void
 203 hammer_parsedevs(const char *blkdevs)
 204 {
 205         char *copy;
 206         char *volname;
 207
 208         if (blkdevs == NULL) {
 209                 errx(1, "A -f blkdevs specification is required "
 210                         "for this command");
 211         }
 212
 213         copy = strdup(blkdevs);
 214         while ((volname = copy) != NULL) {
 215                 if ((copy = strchr(copy, ':')) != NULL)
 216                         *copy++ = 0;
 217                 setup_volume(-1, volname, 0, O_RDONLY);
 218         }
 219 }
 220
 221 static
 222 void
 223 usage(int exit_code)
 224 {
 225         fprintf(stderr,
 226                 "hammer -h\n"
 227                 "hammer now\n"
 228                 "hammer stamp <time>\n"
 229                 "hammer -f blkdevs [-r] show [vol_no[:clu_no]]\n"
 230         );
 231         fprintf(stderr, "    time: +n[s/m/h/D/M/Y]\n"
 232                         "    time: yyyymmdd[:hhmmss]\n");
 233         exit(exit_code);
 234 }
 235