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 1.26 2008/06/25 13:10:06 mneumann Exp $
  35  */
  36
  37 #include "hammer.h"
  38 #include <signal.h>
  39 #include <math.h>
  40
  41 static void hammer_parsedevs(const char *blkdevs);
  42 static void sigalrm(int signo);
  43 static void usage(int exit_code);
  44
  45 int RecurseOpt;
  46 int VerboseOpt;
  47 int NoSyncOpt;
  48 const char *CyclePath;
  49 const char *LinkPath;
  50
  51 int
  52 main(int ac, char **av)
  53 {
  54         int ch;
  55         int timeout = 0;
  56         u_int32_t status;
  57         char *blkdevs = NULL;
  58
  59         while ((ch = getopt(ac, av, "c:dhf:rs:t:v")) != -1) {
  60                 switch(ch) {
  61                 case 'c':
  62                         CyclePath = optarg;
  63                         break;
  64                 case 'd':
  65                         ++DebugOpt;
  66                         break;
  67                 case 'h':
  68                         usage(0);
  69                         /* not reached */
  70                 case 'r':
  71                         RecurseOpt = 1;
  72                         break;
  73                 case 'f':
  74                         blkdevs = optarg;
  75                         break;
  76                 case 's':
  77                         LinkPath = optarg;
  78                         break;
  79                 case 't':
  80                         timeout = strtol(optarg, NULL, 0);
  81                         break;
  82                 case 'v':
  83                         ++VerboseOpt;
  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], "synctid") == 0) {
 103                 hammer_cmd_synctid(av + 1, ac - 1);
 104                 exit(0);
 105         }
 106         if (strcmp(av[0], "namekey") == 0) {
 107                 int64_t key;
 108
 109                 if (av[1] == NULL)
 110                         usage(1);
 111                 key = (int64_t)(crc32(av[1], strlen(av[1])) & 0x7FFFFFFF) << 32;
 112                 if (key == 0)
 113                         key |= 0x100000000LL;
 114                 printf("0x%016llx\n", key);
 115                 exit(0);
 116         }
 117         if (strcmp(av[0], "namekey32") == 0) {
 118                 int32_t key;
 119
 120                 if (av[1] == NULL)
 121                         usage(1);
 122                 key = crc32(av[1], strlen(av[1])) & 0x7FFFFFFF;
 123                 if (key == 0)
 124                         ++key;
 125                 printf("0x%08x\n", key);
 126                 exit(0);
 127         }
 128         if (strcmp(av[0], "pseudofs") == 0) {
 129                 hammer_cmd_pseudofs(av + 1, ac - 1);
 130                 exit(0);
 131         }
 132         if (strcmp(av[0], "prune") == 0) {
 133                 hammer_cmd_softprune(av + 1, ac - 1, 0);
 134                 exit(0);
 135         }
 136         if (strcmp(av[0], "prune-everything") == 0) {
 137                 hammer_cmd_softprune(av + 1, ac - 1, 1);
 138                 exit(0);
 139         }
 140         if (strcmp(av[0], "snapshot") == 0) {
 141                 hammer_cmd_snapshot(av + 1, ac - 1);
 142                 exit(0);
 143         }
 144         if (strcmp(av[0], "bstats") == 0) {
 145                 hammer_cmd_bstats(av + 1, ac - 1);
 146                 exit(0);
 147         }
 148         if (strcmp(av[0], "iostats") == 0) {
 149                 hammer_cmd_iostats(av + 1, ac - 1);
 150                 exit(0);
 151         }
 152
 153         if (strncmp(av[0], "history", 7) == 0) {
 154                 hammer_cmd_history(av[0] + 7, av + 1, ac - 1);
 155                 exit(0);
 156         }
 157         if (strncmp(av[0], "reblock", 7) == 0) {
 158                 if (strcmp(av[0], "reblock") == 0)
 159                         hammer_cmd_reblock(av + 1, ac - 1, -1);
 160                 else if (strcmp(av[0], "reblock-btree") == 0)
 161                         hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_BTREE);
 162                 else if (strcmp(av[0], "reblock-inodes") == 0)
 163                         hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_INODES);
 164                 else if (strcmp(av[0], "reblock-dirs") == 0)
 165                         hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_DIRS);
 166                 else if (strcmp(av[0], "reblock-data") == 0)
 167                         hammer_cmd_reblock(av + 1, ac - 1, HAMMER_IOC_DO_DATA);
 168                 else
 169                         usage(1);
 170                 exit(0);
 171         }
 172
 173         uuid_name_lookup(&Hammer_FSType, "DragonFly HAMMER", &status);
 174         if (status != uuid_s_ok) {
 175                 errx(1, "uuids file does not have the DragonFly "
 176                         "HAMMER filesystem type");
 177         }
 178
 179         if (strcmp(av[0], "show") == 0) {
 180                 hammer_off_t node_offset = (hammer_off_t)-1;
 181
 182                 hammer_parsedevs(blkdevs);
 183                 if (ac > 1)
 184                         sscanf(av[1], "%llx", &node_offset);
 185                 hammer_cmd_show(node_offset, 0, NULL, NULL);
 186                 exit(0);
 187         }
 188         if (strcmp(av[0], "blockmap") == 0) {
 189                 hammer_parsedevs(blkdevs);
 190                 hammer_cmd_blockmap();
 191                 exit(0);
 192         }
 193         usage(1);
 194         /* not reached */
 195         return(0);
 196 }
 197
 198 static
 199 void
 200 hammer_parsedevs(const char *blkdevs)
 201 {
 202         char *copy;
 203         char *volname;
 204
 205         if (blkdevs == NULL) {
 206                 errx(1, "A -f blkdevs specification is required "
 207                         "for this command");
 208         }
 209
 210         copy = strdup(blkdevs);
 211         while ((volname = copy) != NULL) {
 212                 if ((copy = strchr(copy, ':')) != NULL)
 213                         *copy++ = 0;
 214                 setup_volume(-1, volname, 0, O_RDONLY);
 215         }
 216 }
 217
 218 static
 219 void
 220 sigalrm(int signo __unused)
 221 {
 222         /* do nothing (interrupts HAMMER ioctl) */
 223 }
 224
 225 static
 226 void
 227 usage(int exit_code)
 228 {
 229         fprintf(stderr,
 230                 "hammer -h\n"
 231                 "hammer [-t timeout] [-c cyclefile] ....\n"
 232                 "hammer prune <softlink-dir>\n"
 233                 "hammer prune-everything <filesystem>\n"
 234                 "hammer snapshot <softlink-dir> [<filesystem>]\n"
 235                 "hammer bstats <interval>\n"
 236                 "hammer iostats <interval>\n"
 237                 "hammer reblock[-btree/inodes/dirs/data] "
 238                         "<filesystem> [pack%%]\n"
 239                 "hammer pseudofs <dirpath>\n"
 240                 "hammer history[@offset[,len]] <file-1>...<file-N>\n"
 241                 "hammer -f blkdevs [-r] show\n"
 242                 "hammer -f blkdevs blockmap\n"
 243         );
 244         exit(exit_code);
 245 }
 246