sbin/hammer2/cmd_info.c

   1 /*
   2  * Copyright (c) 2015 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Matthew Dillon <dillon@dragonflybsd.org>
   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 #include "hammer2.h"
  35
  36 static void h2disk_check(const char *devpath,
  37                     void (*callback1)(const char *, hammer2_blockref_t *, int));
  38 static void h2pfs_check(int fd, hammer2_blockref_t *bref,
  39                     void (*callback2)(const char *, hammer2_blockref_t *, int));
  40
  41 static void info_callback1(const char *, hammer2_blockref_t *, int);
  42 static void info_callback2(const char *, hammer2_blockref_t *, int);
  43
  44 int
  45 cmd_info(int ac, const char **av)
  46 {
  47         struct dirent *den;
  48         char *devpath;
  49         DIR *dir;
  50         int i;
  51
  52         for (i = 0; i < ac; ++i)
  53                 h2disk_check(av[i], info_callback1);
  54         if (ac == 0 && (dir = opendir("/dev/serno")) != NULL) {
  55                 while ((den = readdir(dir)) != NULL) {
  56                         const char *ptr;
  57                         int slice;
  58                         char part;
  59
  60                         ptr = strrchr(den->d_name, '.');
  61                         if (ptr && sscanf(ptr, ".s%d%c", &slice, &part) == 2) {
  62                                 asprintf(&devpath, "/dev/serno/%s",
  63                                          den->d_name);
  64                                 h2disk_check(devpath, info_callback1);
  65                                 free(devpath);
  66                         }
  67                 }
  68                 closedir(dir);
  69         }
  70         return 0;
  71 }
  72
  73 static
  74 void
  75 info_callback1(const char *path, hammer2_blockref_t *bref, int fd)
  76 {
  77         printf("%s:\n", path);
  78         h2pfs_check(fd, bref, info_callback2);
  79 }
  80
  81 static
  82 void
  83 info_callback2(const char *pfsname,
  84                hammer2_blockref_t *bref __unused, int fd __unused)
  85 {
  86         printf("    %s\n", pfsname);
  87 }
  88
  89 static void mount_callback1(const char *, hammer2_blockref_t *, int);
  90 static void mount_callback2(const char *, hammer2_blockref_t *, int);
  91 static void cmd_mountall_alarm(int signo);
  92
  93 static volatile sig_atomic_t DidAlarm;
  94
  95 int
  96 cmd_mountall(int ac, const char **av)
  97 {
  98         struct dirent *den;
  99         char *devpath;
 100         DIR *dir;
 101         int i;
 102         pid_t pid;
 103
 104         for (i = 0; i < ac; ++i)
 105                 h2disk_check(av[i], mount_callback1);
 106         if (ac == 0 && (dir = opendir("/dev/serno")) != NULL) {
 107                 while ((den = readdir(dir)) != NULL) {
 108                         const char *ptr;
 109                         int slice;
 110                         char part;
 111
 112                         ptr = strrchr(den->d_name, '.');
 113                         if (ptr && sscanf(ptr, ".s%d%c", &slice, &part) == 2) {
 114                                 asprintf(&devpath, "/dev/serno/%s",
 115                                          den->d_name);
 116                                 h2disk_check(devpath, mount_callback1);
 117                                 free(devpath);
 118                         }
 119                 }
 120                 closedir(dir);
 121         }
 122         signal(SIGALRM, cmd_mountall_alarm);
 123         for (;;) {
 124                 alarm(15);
 125                 pid = wait3(NULL, 0, NULL);
 126                 if (pid < 0 && errno == ECHILD)
 127                         break;
 128                 if (pid < 0 && DidAlarm) {
 129                         printf("Timeout waiting for mounts to complete\n");
 130                         break;
 131                 }
 132         }
 133         alarm(0);
 134
 135         return 0;
 136 }
 137
 138 static
 139 void
 140 cmd_mountall_alarm(int signo __unused)
 141 {
 142         DidAlarm = 1;
 143 }
 144
 145 static const char *mount_path;
 146 static const char *mount_comp;
 147
 148 static
 149 void
 150 mount_callback1(const char *devpath, hammer2_blockref_t *bref, int fd)
 151 {
 152         mount_path = devpath;
 153         mount_comp = strrchr(devpath, '/');
 154         if (mount_comp) {
 155                 ++mount_comp;
 156                 h2pfs_check(fd, bref, mount_callback2);
 157         }
 158 }
 159
 160 static
 161 void
 162 mount_callback2(const char *pfsname,
 163                 hammer2_blockref_t *bref __unused, int fd)
 164 {
 165         char *tmp_path;
 166         char *label;
 167         int tfd;
 168
 169         if (strcmp(pfsname, "LOCAL") == 0) {
 170                 if ((tfd = open("/dev/null", O_RDONLY)) >= 0) {
 171                         dup2(tfd, fd);
 172                         close(tfd);
 173                 } else {
 174                         perror("open(/dev/null)");
 175                         exit(1);
 176                 }
 177                 asprintf(&tmp_path, "/var/hammer2/LOCAL.%s", mount_comp);
 178                 asprintf(&label, "%s@LOCAL", mount_path);
 179                 mkdir("/var/hammer2", 0700);
 180                 mkdir(tmp_path, 0700);
 181                 printf("mount %s\n", tmp_path);
 182                 if (fork() == 0) {
 183                         execl("/sbin/mount_hammer2",
 184                               "mount",
 185                               label,
 186                               tmp_path,
 187                               NULL);
 188                 }
 189                 free(label);
 190                 free(tmp_path);
 191         }
 192 }
 193
 194 /*
 195  * Support
 196  */
 197 static
 198 void
 199 h2disk_check(const char *devpath,
 200              void (*callback1)(const char *, hammer2_blockref_t *, int))
 201 {
 202         hammer2_blockref_t broot;
 203         hammer2_blockref_t best;
 204         hammer2_media_data_t media;
 205         struct partinfo partinfo;
 206         int fd;
 207         int i;
 208         int best_i;
 209
 210         fd = open(devpath, O_RDONLY);
 211         if (fd < 0) {
 212                 fprintf(stderr, "Unable to open \"%s\"\n", devpath);
 213                 return;
 214         }
 215         if (ioctl(fd, DIOCGPART, &partinfo) == -1) {
 216                 fprintf(stderr, "DIOCGPART failed on \"%s\"\n", devpath);
 217                 goto done;
 218         }
 219         if (partinfo.fstype != FS_HAMMER2)
 220                 goto done;
 221
 222         /*
 223          * Find the best volume header.
 224          */
 225         best_i = -1;
 226         bzero(&best, sizeof(best));
 227         for (i = 0; i < 4; ++i) {
 228                 bzero(&broot, sizeof(broot));
 229                 broot.type = HAMMER2_BREF_TYPE_VOLUME;
 230                 broot.data_off = (i * HAMMER2_ZONE_BYTES64) |
 231                                  HAMMER2_PBUFRADIX;
 232                 lseek(fd, broot.data_off & ~HAMMER2_OFF_MASK_RADIX, 0);
 233                 if (read(fd, &media, HAMMER2_PBUFSIZE) ==
 234                     (ssize_t)HAMMER2_PBUFSIZE &&
 235                     media.voldata.magic == HAMMER2_VOLUME_ID_HBO) {
 236                         broot.mirror_tid = media.voldata.mirror_tid;
 237                         if (best_i < 0 || best.mirror_tid < broot.mirror_tid) {
 238                                 best_i = i;
 239                                 best = broot;
 240                         }
 241                 }
 242         }
 243         if (best_i >= 0)
 244                 callback1(devpath, &best, fd);
 245 done:
 246         close(fd);
 247 }
 248
 249 static
 250 void
 251 h2pfs_check(int fd, hammer2_blockref_t *bref,
 252             void (*callback2)(const char *, hammer2_blockref_t *, int))
 253 {
 254         hammer2_media_data_t media;
 255         hammer2_blockref_t *bscan;
 256         int bcount;
 257         int i;
 258         size_t bytes;
 259         uint32_t cv;
 260         uint64_t cv64;
 261
 262         bytes = (size_t)1 << (bref->data_off & HAMMER2_OFF_MASK_RADIX);
 263
 264         {
 265                 hammer2_off_t io_off;
 266                 hammer2_off_t io_base;
 267                 size_t io_bytes;
 268                 size_t boff;
 269
 270                 io_off = bref->data_off & ~HAMMER2_OFF_MASK_RADIX;
 271                 io_base = io_off & ~(hammer2_off_t)(HAMMER2_MINIOSIZE - 1);
 272                 io_bytes = bytes;
 273                 boff = io_off - io_base;
 274
 275                 io_bytes = HAMMER2_MINIOSIZE;
 276                 while (io_bytes + boff < bytes)
 277                         io_bytes <<= 1;
 278
 279                 if (io_bytes > sizeof(media)) {
 280                         printf("(bad block size %zd)\n", bytes);
 281                         return;
 282                 }
 283                 if (bref->type != HAMMER2_BREF_TYPE_DATA) {
 284                         lseek(fd, io_base, 0);
 285                         if (read(fd, &media, io_bytes) != (ssize_t)io_bytes) {
 286                                 printf("(media read failed)\n");
 287                                 return;
 288                         }
 289                         if (boff)
 290                                 bcopy((char *)&media + boff, &media, bytes);
 291                 }
 292         }
 293
 294         bscan = NULL;
 295         bcount = 0;
 296
 297         /*
 298          * Check data integrity in verbose mode, otherwise we are just doing
 299          * a quick meta-data scan.  Meta-data integrity is always checked.
 300          * (Also see the check above that ensures the media data is loaded,
 301          * otherwise there's no data to check!).
 302          */
 303         if (bref->type != HAMMER2_BREF_TYPE_DATA || VerboseOpt >= 1) {
 304                 switch(HAMMER2_DEC_CHECK(bref->methods)) {
 305                 case HAMMER2_CHECK_NONE:
 306                         break;
 307                 case HAMMER2_CHECK_DISABLED:
 308                         break;
 309                 case HAMMER2_CHECK_ISCSI32:
 310                         cv = hammer2_icrc32(&media, bytes);
 311                         if (bref->check.iscsi32.value != cv) {
 312                                 printf("\t(icrc failed %02x:%08x/%08x)\n",
 313                                        bref->methods,
 314                                        bref->check.iscsi32.value,
 315                                        cv);
 316                         }
 317                         break;
 318                 case HAMMER2_CHECK_XXHASH64:
 319                         cv64 = XXH64(&media, bytes, XXH_HAMMER2_SEED);
 320                         if (bref->check.xxhash64.value != cv64) {
 321                                 printf("\t(xxhash failed %02x:%016jx/%016jx)\n",
 322                                        bref->methods,
 323                                        bref->check.xxhash64.value,
 324                                        cv64);
 325                         }
 326                         break;
 327                 case HAMMER2_CHECK_SHA192:
 328                         break;
 329                 case HAMMER2_CHECK_FREEMAP:
 330                         cv = hammer2_icrc32(&media, bytes);
 331                         if (bref->check.freemap.icrc32 != cv) {
 332                                 printf("\t(fcrc %02x:%08x/%08x)\n",
 333                                         bref->methods,
 334                                         bref->check.freemap.icrc32,
 335                                         cv);
 336                         }
 337                         break;
 338                 }
 339         }
 340
 341         switch(bref->type) {
 342         case HAMMER2_BREF_TYPE_EMPTY:
 343                 break;
 344         case HAMMER2_BREF_TYPE_INODE:
 345                 if (media.ipdata.meta.pfs_type == HAMMER2_PFSTYPE_SUPROOT) {
 346                         if ((media.ipdata.meta.op_flags &
 347                              HAMMER2_OPFLAG_DIRECTDATA) == 0) {
 348                                 bscan = &media.ipdata.u.blockset.blockref[0];
 349                                 bcount = HAMMER2_SET_COUNT;
 350                         }
 351                 } else
 352                 if (media.ipdata.meta.op_flags & HAMMER2_OPFLAG_PFSROOT) {
 353                         callback2(media.ipdata.filename, bref, fd);
 354                         bscan = NULL;
 355                         bcount = 0;
 356                 } else {
 357                         bscan = NULL;
 358                         bcount = 0;
 359                 }
 360                 break;
 361         case HAMMER2_BREF_TYPE_INDIRECT:
 362                 bscan = &media.npdata[0];
 363                 bcount = bytes / sizeof(hammer2_blockref_t);
 364                 break;
 365         case HAMMER2_BREF_TYPE_DATA:
 366                 break;
 367         case HAMMER2_BREF_TYPE_VOLUME:
 368                 bscan = &media.voldata.sroot_blockset.blockref[0];
 369                 bcount = HAMMER2_SET_COUNT;
 370                 break;
 371         default:
 372                 break;
 373         }
 374         for (i = 0; i < bcount; ++i) {
 375                 if (bscan[i].type != HAMMER2_BREF_TYPE_EMPTY)
 376                         h2pfs_check(fd, &bscan[i], callback2);
 377         }
 378 }