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 1.14 2008/05/04 19:18:17 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> everything\n"
 323                 "hammer reblock <filesystem> [compact%%] (default 90%%)\n"
 324                 "hammer history[@offset[,len]] <file-1>...<file-N>\n"
 325                 "hammer -f blkdevs [-r] show\n"
 326                 "hammer -f blkdevs blockmap\n"
 327         );
 328         fprintf(stderr, "time: +n[s/m/h/D/M/Y]\n"
 329                         "time: yyyymmdd[:hhmmss]\n"
 330                         "modulo_time: n{s,m,h,d,M,y}\n");
 331         exit(exit_code);
 332 }
 333