block.c

   1 /*
   2  * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
   3  * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU Lesser General Public License version 2.1
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #define _GNU_SOURCE
  16 #include <getopt.h>
  17 #include <stdio.h>
  18 #include <unistd.h>
  19 #include <syslog.h>
  20 #include <libgen.h>
  21 #include <glob.h>
  22 #include <dirent.h>
  23 #include <stdarg.h>
  24 #include <string.h>
  25
  26 #include <sys/stat.h>
  27 #include <sys/types.h>
  28 #include <sys/swap.h>
  29 #include <sys/mount.h>
  30 #include <sys/wait.h>
  31
  32 #include <uci.h>
  33 #include <uci_blob.h>
  34
  35 #include <libubox/ulog.h>
  36 #include <libubox/list.h>
  37 #include <libubox/vlist.h>
  38 #include <libubox/blobmsg_json.h>
  39 #include <libubox/avl-cmp.h>
  40
  41 #include "libblkid-tiny/libblkid-tiny.h"
  42
  43 #ifdef UBIFS_EXTROOT
  44 #include "libubi/libubi.h"
  45 #endif
  46
  47 enum {
  48         TYPE_MOUNT,
  49         TYPE_SWAP,
  50 };
  51
  52 struct mount {
  53         struct vlist_node node;
  54         int type;
  55
  56         char *target;
  57         char *path;
  58         char *options;
  59         uint32_t flags;
  60         char *uuid;
  61         char *label;
  62         char *device;
  63         int extroot;
  64         int overlay;
  65         int disabled_fsck;
  66         unsigned int prio;
  67 };
  68
  69 static struct vlist_tree mounts;
  70 static struct blob_buf b;
  71 static LIST_HEAD(devices);
  72 static int anon_mount, anon_swap, auto_mount, auto_swap, check_fs;
  73 static unsigned int delay_root;
  74
  75 enum {
  76         CFG_ANON_MOUNT,
  77         CFG_ANON_SWAP,
  78         CFG_AUTO_MOUNT,
  79         CFG_AUTO_SWAP,
  80         CFG_DELAY_ROOT,
  81         CFG_CHECK_FS,
  82         __CFG_MAX
  83 };
  84
  85 static const struct blobmsg_policy config_policy[__CFG_MAX] = {
  86         [CFG_ANON_SWAP] = { .name = "anon_swap", .type = BLOBMSG_TYPE_INT32 },
  87         [CFG_ANON_MOUNT] = { .name = "anon_mount", .type = BLOBMSG_TYPE_INT32 },
  88         [CFG_AUTO_SWAP] = { .name = "auto_swap", .type = BLOBMSG_TYPE_INT32 },
  89         [CFG_AUTO_MOUNT] = { .name = "auto_mount", .type = BLOBMSG_TYPE_INT32 },
  90         [CFG_DELAY_ROOT] = { .name = "delay_root", .type = BLOBMSG_TYPE_INT32 },
  91         [CFG_CHECK_FS] = { .name = "check_fs", .type = BLOBMSG_TYPE_INT32 },
  92 };
  93
  94 enum {
  95         MOUNT_UUID,
  96         MOUNT_LABEL,
  97         MOUNT_ENABLE,
  98         MOUNT_TARGET,
  99         MOUNT_DEVICE,
 100         MOUNT_OPTIONS,
 101         __MOUNT_MAX
 102 };
 103
 104 static const struct uci_blob_param_list config_attr_list = {
 105         .n_params = __CFG_MAX,
 106         .params = config_policy,
 107 };
 108
 109 static const struct blobmsg_policy mount_policy[__MOUNT_MAX] = {
 110         [MOUNT_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING },
 111         [MOUNT_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING },
 112         [MOUNT_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
 113         [MOUNT_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
 114         [MOUNT_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_STRING },
 115         [MOUNT_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
 116 };
 117
 118 static const struct uci_blob_param_list mount_attr_list = {
 119         .n_params = __MOUNT_MAX,
 120         .params = mount_policy,
 121 };
 122
 123 enum {
 124         SWAP_ENABLE,
 125         SWAP_UUID,
 126         SWAP_LABEL,
 127         SWAP_DEVICE,
 128         SWAP_PRIO,
 129         __SWAP_MAX
 130 };
 131
 132 static const struct blobmsg_policy swap_policy[__SWAP_MAX] = {
 133         [SWAP_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
 134         [SWAP_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING },
 135         [SWAP_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING },
 136         [SWAP_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
 137         [SWAP_PRIO] = { .name = "priority", .type = BLOBMSG_TYPE_INT32 },
 138 };
 139
 140 static const struct uci_blob_param_list swap_attr_list = {
 141         .n_params = __SWAP_MAX,
 142         .params = swap_policy,
 143 };
 144
 145 struct mount_flag {
 146         const char *name;
 147         int32_t flag;
 148 };
 149
 150 #ifndef MS_DIRSYNC
 151 #       define MS_DIRSYNC               (1 << 7)
 152 #endif
 153
 154 #ifndef MS_RELATIME
 155 #       define MS_RELATIME              (1 << 21)
 156 #endif
 157
 158 #ifndef MS_STRICTATIME
 159 #       define MS_STRICTATIME   (1 << 24)
 160 #endif
 161
 162 static const struct mount_flag mount_flags[] = {
 163         { "sync",               MS_SYNCHRONOUS  },
 164         { "async",              ~MS_SYNCHRONOUS },
 165         { "dirsync",            MS_DIRSYNC      },
 166         { "mand",               MS_MANDLOCK     },
 167         { "nomand",             ~MS_MANDLOCK    },
 168         { "atime",              ~MS_NOATIME     },
 169         { "noatime",            MS_NOATIME      },
 170         { "dev",                ~MS_NODEV       },
 171         { "nodev",              MS_NODEV        },
 172         { "diratime",           ~MS_NODIRATIME  },
 173         { "nodiratime",         MS_NODIRATIME   },
 174         { "exec",               ~MS_NOEXEC      },
 175         { "noexec",             MS_NOEXEC       },
 176         { "suid",               ~MS_NOSUID      },
 177         { "nosuid",             MS_NOSUID       },
 178         { "rw",                 ~MS_RDONLY      },
 179         { "ro",                 MS_RDONLY       },
 180         { "relatime",           MS_RELATIME     },
 181         { "norelatime",         ~MS_RELATIME    },
 182         { "strictatime",        MS_STRICTATIME  },
 183 };
 184
 185 static char *blobmsg_get_strdup(struct blob_attr *attr)
 186 {
 187         if (!attr)
 188                 return NULL;
 189
 190         return strdup(blobmsg_get_string(attr));
 191 }
 192
 193 static char *blobmsg_get_basename(struct blob_attr *attr)
 194 {
 195         if (!attr)
 196                 return NULL;
 197
 198         return strdup(basename(blobmsg_get_string(attr)));
 199 }
 200
 201 static void parse_mount_options(struct mount *m, char *optstr)
 202 {
 203         int i;
 204         bool is_flag;
 205         char *p, *opts, *last;
 206
 207         m->flags = 0;
 208         m->options = NULL;
 209
 210         if (!optstr || !*optstr)
 211                 return;
 212
 213         m->options = opts = calloc(1, strlen(optstr) + 1);
 214
 215         if (!m->options)
 216                 return;
 217
 218         p = last = optstr;
 219
 220         do {
 221                 p = strchr(p, ',');
 222
 223                 if (p)
 224                         *p++ = 0;
 225
 226                 for (i = 0, is_flag = false; i < ARRAY_SIZE(mount_flags); i++) {
 227                         if (!strcmp(last, mount_flags[i].name)) {
 228                                 if (mount_flags[i].flag < 0)
 229                                         m->flags &= (uint32_t)mount_flags[i].flag;
 230                                 else
 231                                         m->flags |= (uint32_t)mount_flags[i].flag;
 232                                 is_flag = true;
 233                                 break;
 234                         }
 235                 }
 236
 237                 if (!is_flag)
 238                         opts += sprintf(opts, "%s%s", (opts > m->options) ? "," : "", last);
 239
 240                 last = p;
 241
 242         } while (p);
 243
 244         free(optstr);
 245 }
 246
 247 static int mount_add(struct uci_section *s)
 248 {
 249         struct blob_attr *tb[__MOUNT_MAX] = { 0 };
 250         struct mount *m;
 251
 252         blob_buf_init(&b, 0);
 253         uci_to_blob(&b, s, &mount_attr_list);
 254         blobmsg_parse(mount_policy, __MOUNT_MAX, tb, blob_data(b.head), blob_len(b.head));
 255
 256         if (!tb[MOUNT_LABEL] && !tb[MOUNT_UUID] && !tb[MOUNT_DEVICE])
 257                 return -1;
 258
 259         if (tb[MOUNT_ENABLE] && !blobmsg_get_u32(tb[MOUNT_ENABLE]))
 260                 return -1;
 261
 262         m = malloc(sizeof(struct mount));
 263         m->type = TYPE_MOUNT;
 264         m->uuid = blobmsg_get_strdup(tb[MOUNT_UUID]);
 265         m->label = blobmsg_get_strdup(tb[MOUNT_LABEL]);
 266         m->target = blobmsg_get_strdup(tb[MOUNT_TARGET]);
 267         m->device = blobmsg_get_basename(tb[MOUNT_DEVICE]);
 268
 269         parse_mount_options(m, blobmsg_get_strdup(tb[MOUNT_OPTIONS]));
 270
 271         m->overlay = m->extroot = 0;
 272         if (m->target && !strcmp(m->target, "/"))
 273                 m->extroot = 1;
 274         if (m->target && !strcmp(m->target, "/overlay"))
 275                 m->extroot = m->overlay = 1;
 276
 277         if (m->target && *m->target != '/') {
 278                 ULOG_WARN("ignoring mount section %s due to invalid target '%s'\n",
 279                           s->e.name, m->target);
 280                 free(m);
 281                 return -1;
 282         }
 283
 284         if (m->uuid)
 285                 vlist_add(&mounts, &m->node, m->uuid);
 286         else if (m->label)
 287                 vlist_add(&mounts, &m->node, m->label);
 288         else if (m->device)
 289                 vlist_add(&mounts, &m->node, m->device);
 290
 291         return 0;
 292 }
 293
 294 static int swap_add(struct uci_section *s)
 295 {
 296         struct blob_attr *tb[__SWAP_MAX] = { 0 };
 297         struct mount *m;
 298
 299         blob_buf_init(&b, 0);
 300         uci_to_blob(&b, s, &swap_attr_list);
 301         blobmsg_parse(swap_policy, __SWAP_MAX, tb, blob_data(b.head), blob_len(b.head));
 302
 303         if (!tb[SWAP_UUID] && !tb[SWAP_LABEL] && !tb[SWAP_DEVICE])
 304                 return -1;
 305
 306         m = malloc(sizeof(struct mount));
 307         memset(m, 0, sizeof(struct mount));
 308         m->type = TYPE_SWAP;
 309         m->uuid = blobmsg_get_strdup(tb[SWAP_UUID]);
 310         m->label = blobmsg_get_strdup(tb[SWAP_LABEL]);
 311         m->device = blobmsg_get_basename(tb[SWAP_DEVICE]);
 312         if (tb[SWAP_PRIO])
 313                 m->prio = blobmsg_get_u32(tb[SWAP_PRIO]);
 314         if (m->prio)
 315                 m->prio = ((m->prio << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
 316
 317         if ((!tb[SWAP_ENABLE]) || blobmsg_get_u32(tb[SWAP_ENABLE])) {
 318                 /* store complete swap path */
 319                 if (tb[SWAP_DEVICE])
 320                         m->target = blobmsg_get_strdup(tb[SWAP_DEVICE]);
 321
 322                 if (m->uuid)
 323                         vlist_add(&mounts, &m->node, m->uuid);
 324                 else if (m->label)
 325                         vlist_add(&mounts, &m->node, m->label);
 326                 else if (m->device)
 327                         vlist_add(&mounts, &m->node, m->device);
 328         }
 329
 330         return 0;
 331 }
 332
 333 static int global_add(struct uci_section *s)
 334 {
 335         struct blob_attr *tb[__CFG_MAX] = { 0 };
 336
 337         blob_buf_init(&b, 0);
 338         uci_to_blob(&b, s, &config_attr_list);
 339         blobmsg_parse(config_policy, __CFG_MAX, tb, blob_data(b.head), blob_len(b.head));
 340
 341         if ((tb[CFG_ANON_MOUNT]) && blobmsg_get_u32(tb[CFG_ANON_MOUNT]))
 342                 anon_mount = 1;
 343         if ((tb[CFG_ANON_SWAP]) && blobmsg_get_u32(tb[CFG_ANON_SWAP]))
 344                 anon_swap = 1;
 345
 346         if ((tb[CFG_AUTO_MOUNT]) && blobmsg_get_u32(tb[CFG_AUTO_MOUNT]))
 347                 auto_mount = 1;
 348         if ((tb[CFG_AUTO_SWAP]) && blobmsg_get_u32(tb[CFG_AUTO_SWAP]))
 349                 auto_swap = 1;
 350
 351         if (tb[CFG_DELAY_ROOT])
 352                 delay_root = blobmsg_get_u32(tb[CFG_DELAY_ROOT]);
 353
 354         if ((tb[CFG_CHECK_FS]) && blobmsg_get_u32(tb[CFG_CHECK_FS]))
 355                 check_fs = 1;
 356
 357         return 0;
 358 }
 359
 360 static struct mount* find_swap(const char *uuid, const char *label, const char *device)
 361 {
 362         struct mount *m;
 363
 364         vlist_for_each_element(&mounts, m, node) {
 365                 if (m->type != TYPE_SWAP)
 366                         continue;
 367                 if (uuid && m->uuid && !strcasecmp(m->uuid, uuid))
 368                         return m;
 369                 if (label && m->label && !strcmp(m->label, label))
 370                         return m;
 371                 if (device && m->device && !strcmp(m->device, device))
 372                         return m;
 373         }
 374
 375         return NULL;
 376 }
 377
 378 static struct mount* find_block(const char *uuid, const char *label, const char *device,
 379                                 const char *target)
 380 {
 381         struct mount *m;
 382
 383         vlist_for_each_element(&mounts, m, node) {
 384                 if (m->type != TYPE_MOUNT)
 385                         continue;
 386                 if (m->uuid && uuid && !strcasecmp(m->uuid, uuid))
 387                         return m;
 388                 if (m->label && label && !strcmp(m->label, label))
 389                         return m;
 390                 if (m->target && target && !strcmp(m->target, target))
 391                         return m;
 392                 if (m->device && device && !strcmp(m->device, device))
 393                         return m;
 394         }
 395
 396         return NULL;
 397 }
 398
 399 static void mounts_update(struct vlist_tree *tree, struct vlist_node *node_new,
 400                           struct vlist_node *node_old)
 401 {
 402 }
 403
 404 static struct uci_package * config_try_load(struct uci_context *ctx, char *path)
 405 {
 406         char *file = basename(path);
 407         char *dir = dirname(path);
 408         char *err;
 409         struct uci_package *pkg;
 410
 411         uci_set_confdir(ctx, dir);
 412         ULOG_INFO("attempting to load %s/%s\n", dir, file);
 413
 414         if (uci_load(ctx, file, &pkg)) {
 415                 uci_get_errorstr(ctx, &err, file);
 416                 ULOG_ERR("unable to load configuration (%s)\n", err);
 417
 418                 free(err);
 419                 return NULL;
 420         }
 421
 422         return pkg;
 423 }
 424
 425 static int config_load(char *cfg)
 426 {
 427         struct uci_context *ctx = uci_alloc_context();
 428         struct uci_package *pkg = NULL;
 429         struct uci_element *e;
 430         char path[64];
 431
 432         vlist_init(&mounts, avl_strcmp, mounts_update);
 433
 434         if (cfg) {
 435                 snprintf(path, sizeof(path), "%s/upper/etc/config/fstab", cfg);
 436                 pkg = config_try_load(ctx, path);
 437
 438                 if (!pkg) {
 439                         snprintf(path, sizeof(path), "%s/etc/config/fstab", cfg);
 440                         pkg = config_try_load(ctx, path);
 441                 }
 442         }
 443
 444         if (!pkg) {
 445                 snprintf(path, sizeof(path), "/etc/config/fstab");
 446                 pkg = config_try_load(ctx, path);
 447         }
 448
 449         if (!pkg) {
 450                 ULOG_ERR("no usable configuration\n");
 451                 return -1;
 452         }
 453
 454         vlist_update(&mounts);
 455         uci_foreach_element(&pkg->sections, e) {
 456                 struct uci_section *s = uci_to_section(e);
 457
 458                 if (!strcmp(s->type, "mount"))
 459                         mount_add(s);
 460                 if (!strcmp(s->type, "swap"))
 461                         swap_add(s);
 462                 if (!strcmp(s->type, "global"))
 463                         global_add(s);
 464         }
 465         vlist_flush(&mounts);
 466
 467         return 0;
 468 }
 469
 470 static struct blkid_struct_probe* _probe_path(char *path)
 471 {
 472         struct blkid_struct_probe *pr;
 473
 474         pr = malloc(sizeof(*pr));
 475
 476         if (!pr)
 477                 return NULL;
 478
 479         memset(pr, 0, sizeof(*pr));
 480         probe_block(path, pr);
 481
 482         if (pr->err || !pr->id) {
 483                 free(pr);
 484                 return NULL;
 485         }
 486
 487         return pr;
 488 }
 489
 490 static int _cache_load(const char *path)
 491 {
 492         int gl_flags = GLOB_NOESCAPE | GLOB_MARK;
 493         int j;
 494         glob_t gl;
 495
 496         if (glob(path, gl_flags, NULL, &gl) < 0)
 497                 return -1;
 498
 499         for (j = 0; j < gl.gl_pathc; j++) {
 500                 struct blkid_struct_probe *pr = _probe_path(gl.gl_pathv[j]);
 501                 if (pr)
 502                         list_add_tail(&pr->list, &devices);
 503         }
 504
 505         globfree(&gl);
 506
 507         return 0;
 508 }
 509
 510 static void cache_load(int mtd)
 511 {
 512         if (mtd) {
 513                 _cache_load("/dev/mtdblock*");
 514                 _cache_load("/dev/ubiblock*");
 515                 _cache_load("/dev/ubi?*_?*");
 516         }
 517         _cache_load("/dev/mmcblk*");
 518         _cache_load("/dev/sd*");
 519         _cache_load("/dev/hd*");
 520         _cache_load("/dev/md*");
 521         _cache_load("/dev/vd*");
 522         _cache_load("/dev/mapper/*");
 523 }
 524
 525 static int print_block_info(struct blkid_struct_probe *pr)
 526 {
 527         printf("%s:", pr->dev);
 528         if (pr->uuid[0])
 529                 printf(" UUID=\"%s\"", pr->uuid);
 530
 531         if (pr->label[0])
 532                 printf(" LABEL=\"%s\"", pr->label);
 533
 534         if (pr->name[0])
 535                 printf(" NAME=\"%s\"", pr->name);
 536
 537         if (pr->version[0])
 538                 printf(" VERSION=\"%s\"", pr->version);
 539
 540         printf(" TYPE=\"%s\"\n", pr->id->name);
 541
 542         return 0;
 543 }
 544
 545 static int print_block_uci(struct blkid_struct_probe *pr)
 546 {
 547         if (!strcmp(pr->id->name, "swap")) {
 548                 printf("config 'swap'\n");
 549         } else {
 550                 printf("config 'mount'\n");
 551                 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev));
 552         }
 553         if (pr->uuid[0])
 554                 printf("\toption\tuuid\t'%s'\n", pr->uuid);
 555         else
 556                 printf("\toption\tdevice\t'%s'\n", pr->dev);
 557         printf("\toption\tenabled\t'0'\n\n");
 558
 559         return 0;
 560 }
 561
 562 static struct blkid_struct_probe* find_block_info(char *uuid, char *label, char *path)
 563 {
 564         struct blkid_struct_probe *pr = NULL;
 565
 566         if (uuid)
 567                 list_for_each_entry(pr, &devices, list)
 568                         if (!strcasecmp(pr->uuid, uuid))
 569                                 return pr;
 570
 571         if (label)
 572                 list_for_each_entry(pr, &devices, list)
 573                         if (!strcmp(pr->label, label))
 574                                 return pr;
 575
 576         if (path)
 577                 list_for_each_entry(pr, &devices, list)
 578                         if (!strcmp(basename(pr->dev), basename(path)))
 579                                 return pr;
 580
 581         return NULL;
 582 }
 583
 584 static char* find_mount_point(char *block)
 585 {
 586         FILE *fp = fopen("/proc/mounts", "r");
 587         static char line[256];
 588         int len = strlen(block);
 589         char *point = NULL;
 590
 591         if(!fp)
 592                 return NULL;
 593
 594         while (fgets(line, sizeof(line), fp)) {
 595                 if (!strncmp(line, block, len)) {
 596                         char *p = &line[len + 1];
 597                         char *t = strstr(p, " ");
 598
 599                         if (!t) {
 600                                 fclose(fp);
 601                                 return NULL;
 602                         }
 603                         *t = '\0';
 604                         point = p;
 605                         break;
 606                 }
 607         }
 608
 609         fclose(fp);
 610
 611         return point;
 612 }
 613
 614 static void mkdir_p(char *dir)
 615 {
 616         char *l = strrchr(dir, '/');
 617
 618         if (l) {
 619                 *l = '\0';
 620                 mkdir_p(dir);
 621                 *l = '/';
 622                 mkdir(dir, 0755);
 623         }
 624 }
 625
 626 static void check_filesystem(struct blkid_struct_probe *pr)
 627 {
 628         pid_t pid;
 629         struct stat statbuf;
 630         const char *e2fsck = "/usr/sbin/e2fsck";
 631         const char *dosfsck = "/usr/sbin/dosfsck";
 632         const char *ckfs;
 633
 634         /* UBIFS does not need stuff like fsck */
 635         if (!strncmp(pr->id->name, "ubifs", 5))
 636                 return;
 637
 638         if (!strncmp(pr->id->name, "vfat", 4)) {
 639                 ckfs = dosfsck;
 640         } else if (!strncmp(pr->id->name, "ext", 3)) {
 641                 ckfs = e2fsck;
 642         } else {
 643                 ULOG_ERR("check_filesystem: %s is not supported\n", pr->id->name);
 644                 return;
 645         }
 646
 647         if (stat(ckfs, &statbuf) < 0) {
 648                 ULOG_ERR("check_filesystem: %s not found\n", ckfs);
 649                 return;
 650         }
 651
 652         pid = fork();
 653         if (!pid) {
 654                 execl(ckfs, ckfs, "-p", pr->dev, NULL);
 655                 exit(-1);
 656         } else if (pid > 0) {
 657                 int status;
 658
 659                 waitpid(pid, &status, 0);
 660                 if (WEXITSTATUS(status))
 661                         ULOG_ERR("check_filesystem: %s returned %d\n", ckfs, WEXITSTATUS(status));
 662         }
 663 }
 664
 665 static void handle_swapfiles(bool on)
 666 {
 667         struct stat s;
 668         struct mount *m;
 669         struct blkid_struct_probe *pr;
 670
 671         vlist_for_each_element(&mounts, m, node)
 672         {
 673                 if (m->type != TYPE_SWAP || !m->target)
 674                         continue;
 675
 676                 if (stat(m->target, &s) || !S_ISREG(s.st_mode))
 677                         continue;
 678
 679                 pr = _probe_path(m->target);
 680
 681                 if (!pr)
 682                         continue;
 683
 684                 if (!strcmp(pr->id->name, "swap")) {
 685                         if (on)
 686                                 swapon(pr->dev, m->prio);
 687                         else
 688                                 swapoff(pr->dev);
 689                 }
 690
 691                 free(pr);
 692         }
 693 }
 694
 695 static int mount_device(struct blkid_struct_probe *pr, int hotplug)
 696 {
 697         struct mount *m;
 698         char *device;
 699
 700         if (!pr)
 701                 return -1;
 702
 703         device = basename(pr->dev);
 704
 705         if (!strcmp(pr->id->name, "swap")) {
 706                 if (hotplug && !auto_swap)
 707                         return -1;
 708                 m = find_swap(pr->uuid, pr->label, device);
 709                 if (m || anon_swap)
 710                         swapon(pr->dev, (m) ? (m->prio) : (0));
 711
 712                 return 0;
 713         }
 714
 715         if (hotplug && !auto_mount)
 716                 return -1;
 717
 718         if (find_mount_point(pr->dev)) {
 719                 ULOG_ERR("%s is already mounted\n", pr->dev);
 720                 return -1;
 721         }
 722
 723         m = find_block(pr->uuid, pr->label, device, NULL);
 724         if (m && m->extroot)
 725                 return -1;
 726
 727         if (m) {
 728                 char *target = m->target;
 729                 char _target[32];
 730                 int err = 0;
 731
 732                 if (!target) {
 733                         snprintf(_target, sizeof(_target), "/mnt/%s", device);
 734                         target = _target;
 735                 }
 736                 mkdir_p(target);
 737
 738                 if (check_fs)
 739                         check_filesystem(pr);
 740
 741                 err = mount(pr->dev, target, pr->id->name, m->flags,
 742                             (m->options) ? (m->options) : (""));
 743                 if (err)
 744                         ULOG_ERR("mounting %s (%s) as %s failed (%d) - %s\n",
 745                                  pr->dev, pr->id->name, target, err, strerror(err));
 746                 else
 747                         handle_swapfiles(true);
 748                 return err;
 749         }
 750
 751         if (anon_mount) {
 752                 char target[] = "/mnt/mmcblk123";
 753                 int err = 0;
 754
 755                 snprintf(target, sizeof(target), "/mnt/%s", device);
 756                 mkdir_p(target);
 757
 758                 if (check_fs)
 759                         check_filesystem(pr);
 760
 761                 err = mount(pr->dev, target, pr->id->name, 0, "");
 762                 if (err)
 763                         ULOG_ERR("mounting %s (%s) as %s failed (%d) - %s\n",
 764                                  pr->dev, pr->id->name, target, err, strerror(err));
 765                 else
 766                         handle_swapfiles(true);
 767                 return err;
 768         }
 769
 770         return 0;
 771 }
 772
 773 static int umount_device(struct blkid_struct_probe *pr)
 774 {
 775         struct mount *m;
 776         char *device = basename(pr->dev);
 777         char *mp;
 778         int err;
 779
 780         if (!pr)
 781                 return -1;
 782
 783         if (!strcmp(pr->id->name, "swap"))
 784                 return -1;
 785
 786         mp = find_mount_point(pr->dev);
 787         if (!mp)
 788                 return -1;
 789
 790         m = find_block(pr->uuid, pr->label, device, NULL);
 791         if (m && m->extroot)
 792                 return -1;
 793
 794         err = umount2(mp, MNT_DETACH);
 795         if (err)
 796                 ULOG_ERR("unmounting %s (%s)  failed (%d) - %s\n",
 797                          pr->dev, mp, err, strerror(err));
 798         else
 799                 ULOG_INFO("unmounted %s (%s)\n",
 800                           pr->dev, mp);
 801
 802         return err;
 803 }
 804
 805 static int main_hotplug(int argc, char **argv)
 806 {
 807         char path[32];
 808         char *action, *device, *mount_point;
 809
 810         action = getenv("ACTION");
 811         device = getenv("DEVNAME");
 812
 813         if (!action || !device)
 814                 return -1;
 815         snprintf(path, sizeof(path), "/dev/%s", device);
 816
 817         if (!strcmp(action, "remove")) {
 818                 int err = 0;
 819                 mount_point = find_mount_point(path);
 820                 if (mount_point)
 821                         err = umount2(mount_point, MNT_DETACH);
 822
 823                 if (err)
 824                         ULOG_ERR("umount of %s failed (%d) - %s\n",
 825                                  mount_point, err, strerror(err));
 826
 827                 return 0;
 828         } else if (strcmp(action, "add")) {
 829                 ULOG_ERR("Unkown action %s\n", action);
 830
 831                 return -1;
 832         }
 833
 834         if (config_load(NULL))
 835                 return -1;
 836         cache_load(0);
 837
 838         return mount_device(find_block_info(NULL, NULL, path), 1);
 839 }
 840
 841 static int find_block_mtd(char *name, char *part, int plen)
 842 {
 843         FILE *fp = fopen("/proc/mtd", "r");
 844         static char line[256];
 845         char *index = NULL;
 846
 847         if(!fp)
 848                 return -1;
 849
 850         while (!index && fgets(line, sizeof(line), fp)) {
 851                 if (strstr(line, name)) {
 852                         char *eol = strstr(line, ":");
 853
 854                         if (!eol)
 855                                 continue;
 856
 857                         *eol = '\0';
 858                         index = &line[3];
 859                 }
 860         }
 861
 862         fclose(fp);
 863
 864         if (!index)
 865                 return -1;
 866
 867         snprintf(part, plen, "/dev/mtdblock%s", index);
 868
 869         return 0;
 870 }
 871
 872 #ifdef UBIFS_EXTROOT
 873 static int find_ubi_vol(libubi_t libubi, char *name, int *dev_num, int *vol_id)
 874 {
 875         int dev = 0;
 876
 877         while (ubi_dev_present(libubi, dev))
 878         {
 879                 struct ubi_dev_info dev_info;
 880                 struct ubi_vol_info vol_info;
 881
 882                 if (ubi_get_dev_info1(libubi, dev++, &dev_info))
 883                         continue;
 884                 if (ubi_get_vol_info1_nm(libubi, dev_info.dev_num, name, &vol_info))
 885                         continue;
 886
 887                 *dev_num = dev_info.dev_num;
 888                 *vol_id = vol_info.vol_id;
 889
 890                 return 0;
 891         }
 892
 893         return -1;
 894 }
 895
 896 static int find_block_ubi(libubi_t libubi, char *name, char *part, int plen)
 897 {
 898         int dev_num;
 899         int vol_id;
 900         int err = -1;
 901
 902         err = find_ubi_vol(libubi, name, &dev_num, &vol_id);
 903         if (!err)
 904                 snprintf(part, plen, "/dev/ubi%d_%d", dev_num, vol_id);
 905
 906         return err;
 907 }
 908
 909 static int find_block_ubi_RO(libubi_t libubi, char *name, char *part, int plen)
 910 {
 911         int dev_num;
 912         int vol_id;
 913         int err = -1;
 914
 915         err = find_ubi_vol(libubi, name, &dev_num, &vol_id);
 916         if (!err)
 917                 snprintf(part, plen, "/dev/ubiblock%d_%d", dev_num, vol_id);
 918
 919         return err;
 920 }
 921
 922 #else
 923
 924 static int find_root_dev(char *buf, int len)
 925 {
 926         DIR *d;
 927         dev_t root;
 928         struct stat s;
 929         struct dirent *e;
 930
 931         if (stat("/", &s))
 932                 return -1;
 933
 934         if (!(d = opendir("/dev")))
 935                 return -1;
 936
 937         root = s.st_dev;
 938
 939         while ((e = readdir(d)) != NULL) {
 940                 snprintf(buf, len, "/dev/%s", e->d_name);
 941
 942                 if (stat(buf, &s) || s.st_rdev != root)
 943                         continue;
 944
 945                 closedir(d);
 946                 return 0;
 947         }
 948
 949         closedir(d);
 950         return -1;
 951 }
 952
 953 #endif
 954
 955 static int test_fs_support(const char *name)
 956 {
 957         char line[128], *p;
 958         int rv = -1;
 959         FILE *f;
 960
 961         if ((f = fopen("/proc/filesystems", "r")) != NULL) {
 962                 while (fgets(line, sizeof(line), f)) {
 963                         p = strtok(line, "\t\n");
 964
 965                         if (p && !strcmp(p, "nodev"))
 966                                 p = strtok(NULL, "\t\n");
 967
 968                         if (p && !strcmp(p, name)) {
 969                                 rv = 0;
 970                                 break;
 971                         }
 972                 }
 973                 fclose(f);
 974         }
 975
 976         return rv;
 977 }
 978
 979 static int check_extroot(char *path)
 980 {
 981         struct blkid_struct_probe *pr = NULL;
 982         char devpath[32];
 983
 984 #ifdef UBIFS_EXTROOT
 985         if (find_block_mtd("\"rootfs\"", devpath, sizeof(devpath))) {
 986                 int err = -1;
 987                 libubi_t libubi;
 988
 989                 libubi = libubi_open();
 990                 err = find_block_ubi_RO(libubi, "rootfs", devpath, sizeof(devpath));
 991                 libubi_close(libubi);
 992                 if (err)
 993                         return -1;
 994         }
 995 #else
 996         if (find_block_mtd("\"rootfs\"", devpath, sizeof(devpath))) {
 997                 if (find_root_dev(devpath, sizeof(devpath))) {
 998                         ULOG_ERR("extroot: unable to determine root device\n");
 999                         return -1;
1000                 }
1001         }
1002 #endif
1003
1004         list_for_each_entry(pr, &devices, list) {
1005                 if (!strcmp(pr->dev, devpath)) {
1006                         struct stat s;
1007                         FILE *fp = NULL;
1008                         char tag[64];
1009                         char uuid[64] = { 0 };
1010
1011                         snprintf(tag, sizeof(tag), "%s/etc", path);
1012                         if (stat(tag, &s))
1013                                 mkdir_p(tag);
1014
1015                         snprintf(tag, sizeof(tag), "%s/etc/.extroot-uuid", path);
1016                         if (stat(tag, &s)) {
1017                                 fp = fopen(tag, "w+");
1018                                 if (!fp) {
1019                                         ULOG_ERR("extroot: failed to write UUID to %s: %d (%s)\n",
1020                                                  tag, errno, strerror(errno));
1021                                         /* return 0 to continue boot regardless of error */
1022                                         return 0;
1023                                 }
1024                                 fputs(pr->uuid, fp);
1025                                 fclose(fp);
1026                                 return 0;
1027                         }
1028
1029                         fp = fopen(tag, "r");
1030                         if (!fp) {
1031                                 ULOG_ERR("extroot: failed to read UUID from %s: %d (%s)\n",
1032                                          tag, errno, strerror(errno));
1033                                 return -1;
1034                         }
1035
1036                         if (!fgets(uuid, sizeof(uuid), fp))
1037                                 ULOG_ERR("extroot: failed to read UUID from %s: %d (%s)\n",
1038                                          tag, errno, strerror(errno));
1039                         fclose(fp);
1040
1041                         if (*uuid || !strcasecmp(uuid, pr->uuid))
1042                                 return 0;
1043
1044                         ULOG_ERR("extroot: UUID mismatch (root: %s, %s: %s)\n",
1045                                  pr->uuid, basename(path), uuid);
1046                         return -1;
1047                 }
1048         }
1049
1050         ULOG_ERR("extroot: unable to lookup root device %s\n", devpath);
1051         return -1;
1052 }
1053
1054 /*
1055  * Read info about extroot from UCI (using prefix) and mount it.
1056  */
1057 static int mount_extroot(char *cfg)
1058 {
1059         char overlay[] = "/tmp/extroot/overlay";
1060         char mnt[] = "/tmp/extroot/mnt";
1061         char *path = mnt;
1062         struct blkid_struct_probe *pr;
1063         struct mount *m;
1064         int err = -1;
1065
1066         /* Load @cfg/etc/config/fstab */
1067         if (config_load(cfg))
1068                 return -2;
1069
1070         /* See if there is extroot-specific mount config */
1071         m = find_block(NULL, NULL, NULL, "/");
1072         if (!m)
1073                 m = find_block(NULL, NULL, NULL, "/overlay");
1074
1075         if (!m || !m->extroot)
1076         {
1077                 ULOG_INFO("extroot: not configured\n");
1078                 return -1;
1079         }
1080
1081         /* Find block device pointed by the mount config */
1082         pr = find_block_info(m->uuid, m->label, m->device);
1083
1084         if (!pr && delay_root){
1085                 ULOG_INFO("extroot: device not present, retrying in %u seconds\n", delay_root);
1086                 sleep(delay_root);
1087                 mkblkdev();
1088                 cache_load(0);
1089                 pr = find_block_info(m->uuid, m->label, m->device);
1090         }
1091         if (pr) {
1092                 if (strncmp(pr->id->name, "ext", 3) &&
1093                     strncmp(pr->id->name, "ubifs", 5)) {
1094                         ULOG_ERR("extroot: unsupported filesystem %s, try ext4\n", pr->id->name);
1095                         return -1;
1096                 }
1097
1098                 if (test_fs_support(pr->id->name)) {
1099                         ULOG_ERR("extroot: filesystem %s not supported by kernel\n", pr->id->name);
1100                         return -1;
1101                 }
1102
1103                 if (m->overlay)
1104                         path = overlay;
1105                 mkdir_p(path);
1106
1107                 if (check_fs)
1108                         check_filesystem(pr);
1109
1110                 err = mount(pr->dev, path, pr->id->name, m->flags,
1111                             (m->options) ? (m->options) : (""));
1112
1113                 if (err) {
1114                         ULOG_ERR("extroot: mounting %s (%s) on %s failed: %d (%s)\n",
1115                                  pr->dev, pr->id->name, path, err, strerror(err));
1116                 } else if (m->overlay) {
1117                         err = check_extroot(path);
1118                         if (err)
1119                                 umount(path);
1120                 }
1121         } else {
1122                 ULOG_ERR("extroot: cannot find device %s%s\n",
1123                          (m->uuid ? "with UUID " : (m->label ? "with label " : "")),
1124                          (m->uuid ? m->uuid : (m->label ? m->label : m->device)));
1125         }
1126
1127         return err;
1128 }
1129
1130 static int main_extroot(int argc, char **argv)
1131 {
1132         struct blkid_struct_probe *pr;
1133         char blkdev_path[32] = { 0 };
1134         int err = -1;
1135 #ifdef UBIFS_EXTROOT
1136         libubi_t libubi;
1137 #endif
1138
1139         if (!getenv("PREINIT"))
1140                 return -1;
1141
1142         if (argc != 2) {
1143                 ULOG_ERR("Usage: block extroot\n");
1144                 return -1;
1145         }
1146
1147         mkblkdev();
1148         cache_load(1);
1149
1150         /* enable LOG_INFO messages */
1151         ulog_threshold(LOG_INFO);
1152
1153         /*
1154          * Look for "rootfs_data". We will want to mount it and check for
1155          * extroot configuration.
1156          */
1157
1158         /* Start with looking for MTD partition */
1159         find_block_mtd("\"rootfs_data\"", blkdev_path, sizeof(blkdev_path));
1160         if (blkdev_path[0]) {
1161                 pr = find_block_info(NULL, NULL, blkdev_path);
1162                 if (pr && !strcmp(pr->id->name, "jffs2")) {
1163                         char cfg[] = "/tmp/jffs_cfg";
1164
1165                         /*
1166                          * Mount MTD part and try extroot (using
1167                          * /etc/config/fstab from that partition)
1168                          */
1169                         mkdir_p(cfg);
1170                         if (!mount(blkdev_path, cfg, "jffs2", MS_NOATIME, NULL)) {
1171                                 err = mount_extroot(cfg);
1172                                 umount2(cfg, MNT_DETACH);
1173                         }
1174                         if (err < 0)
1175                                 rmdir("/tmp/overlay");
1176                         rmdir(cfg);
1177                         return err;
1178                 }
1179         }
1180
1181 #ifdef UBIFS_EXTROOT
1182         /* ... but it also could be an UBI volume */
1183         memset(blkdev_path, 0, sizeof(blkdev_path));
1184         libubi = libubi_open();
1185         find_block_ubi(libubi, "rootfs_data", blkdev_path, sizeof(blkdev_path));
1186         libubi_close(libubi);
1187         if (blkdev_path[0]) {
1188                 char cfg[] = "/tmp/ubifs_cfg";
1189
1190                 /* Mount volume and try extroot (using fstab from that vol) */
1191                 mkdir_p(cfg);
1192                 if (!mount(blkdev_path, cfg, "ubifs", MS_NOATIME, NULL)) {
1193                         err = mount_extroot(cfg);
1194                         umount2(cfg, MNT_DETACH);
1195                 }
1196                 if (err < 0)
1197                         rmdir("/tmp/overlay");
1198                 rmdir(cfg);
1199                 return err;
1200        }
1201 #endif
1202
1203         return mount_extroot(NULL);
1204 }
1205
1206 static int main_mount(int argc, char **argv)
1207 {
1208         struct blkid_struct_probe *pr;
1209
1210         if (config_load(NULL))
1211                 return -1;
1212
1213         cache_load(1);
1214         list_for_each_entry(pr, &devices, list)
1215                 mount_device(pr, 0);
1216
1217         handle_swapfiles(true);
1218
1219         return 0;
1220 }
1221
1222 static int main_umount(int argc, char **argv)
1223 {
1224         struct blkid_struct_probe *pr;
1225
1226         if (config_load(NULL))
1227                 return -1;
1228
1229         handle_swapfiles(false);
1230
1231         cache_load(0);
1232         list_for_each_entry(pr, &devices, list)
1233                 umount_device(pr);
1234
1235         return 0;
1236 }
1237
1238 static int main_detect(int argc, char **argv)
1239 {
1240         struct blkid_struct_probe *pr;
1241
1242         cache_load(0);
1243         printf("config 'global'\n");
1244         printf("\toption\tanon_swap\t'0'\n");
1245         printf("\toption\tanon_mount\t'0'\n");
1246         printf("\toption\tauto_swap\t'1'\n");
1247         printf("\toption\tauto_mount\t'1'\n");
1248         printf("\toption\tdelay_root\t'5'\n");
1249         printf("\toption\tcheck_fs\t'0'\n\n");
1250         list_for_each_entry(pr, &devices, list)
1251                 print_block_uci(pr);
1252
1253         return 0;
1254 }
1255
1256 static int main_info(int argc, char **argv)
1257 {
1258         int i;
1259         struct blkid_struct_probe *pr;
1260
1261         cache_load(1);
1262         if (argc == 2) {
1263                 list_for_each_entry(pr, &devices, list)
1264                         print_block_info(pr);
1265
1266                 return 0;
1267         };
1268
1269         for (i = 2; i < argc; i++) {
1270                 struct stat s;
1271
1272                 if (stat(argv[i], &s)) {
1273                         ULOG_ERR("failed to stat %s\n", argv[i]);
1274                         continue;
1275                 }
1276                 if (!S_ISBLK(s.st_mode)) {
1277                         ULOG_ERR("%s is not a block device\n", argv[i]);
1278                         continue;
1279                 }
1280                 pr = find_block_info(NULL, NULL, argv[i]);
1281                 if (pr)
1282                         print_block_info(pr);
1283         }
1284
1285         return 0;
1286 }
1287
1288 static int swapon_usage(void)
1289 {
1290         fprintf(stderr, "Usage: swapon [-s] [-a] [[-p pri] DEVICE]\n\n"
1291                 "\tStart swapping on [DEVICE]\n"
1292                 " -a\tStart swapping on all swap devices\n"
1293                 " -p pri\tSet priority of swap device\n"
1294                 " -s\tShow summary\n");
1295         return -1;
1296 }
1297
1298 static int main_swapon(int argc, char **argv)
1299 {
1300         int ch;
1301         FILE *fp;
1302         char *lineptr;
1303         size_t s;
1304         struct blkid_struct_probe *pr;
1305         int flags = 0;
1306         int pri;
1307         struct stat st;
1308         int err;
1309
1310         while ((ch = getopt(argc, argv, "ap:s")) != -1) {
1311                 switch(ch) {
1312                 case 's':
1313                         fp = fopen("/proc/swaps", "r");
1314                         lineptr = NULL;
1315
1316                         if (!fp) {
1317                                 ULOG_ERR("failed to open /proc/swaps\n");
1318                                 return -1;
1319                         }
1320                         while (getline(&lineptr, &s, fp) > 0)
1321                                 printf("%s", lineptr);
1322                         if (lineptr)
1323                                 free(lineptr);
1324                         fclose(fp);
1325                         return 0;
1326                 case 'a':
1327                         cache_load(0);
1328                         list_for_each_entry(pr, &devices, list) {
1329                                 if (strcmp(pr->id->name, "swap"))
1330                                         continue;
1331                                 if (swapon(pr->dev, 0))
1332                                         ULOG_ERR("failed to swapon %s\n", pr->dev);
1333                         }
1334                         return 0;
1335                 case 'p':
1336                         pri = atoi(optarg);
1337                         if (pri >= 0)
1338                                 flags = ((pri << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
1339                         break;
1340                 default:
1341                         return swapon_usage();
1342                 }
1343
1344         }
1345
1346         if (optind != (argc - 1))
1347                 return swapon_usage();
1348
1349         if (stat(argv[optind], &st) || (!S_ISBLK(st.st_mode) && !S_ISREG(st.st_mode))) {
1350                 ULOG_ERR("%s is not a block device or file\n", argv[optind]);
1351                 return -1;
1352         }
1353         err = swapon(argv[optind], flags);
1354         if (err) {
1355                 ULOG_ERR("failed to swapon %s (%d)\n", argv[optind], err);
1356                 return err;
1357         }
1358
1359         return 0;
1360 }
1361
1362 static int main_swapoff(int argc, char **argv)
1363 {
1364         if (argc != 2) {
1365                 ULOG_ERR("Usage: swapoff [-a] [DEVICE]\n\n"
1366                         "\tStop swapping on DEVICE\n"
1367                         " -a\tStop swapping on all swap devices\n");
1368                 return -1;
1369         }
1370
1371         if (!strcmp(argv[1], "-a")) {
1372                 FILE *fp = fopen("/proc/swaps", "r");
1373                 char line[256];
1374
1375                 if (!fp) {
1376                         ULOG_ERR("failed to open /proc/swaps\n");
1377                         return -1;
1378                 }
1379                 if (fgets(line, sizeof(line), fp))
1380                         while (fgets(line, sizeof(line), fp)) {
1381                                 char *end = strchr(line, ' ');
1382                                 int err;
1383
1384                                 if (!end)
1385                                         continue;
1386                                 *end = '\0';
1387                                 err = swapoff(line);
1388                                 if (err)
1389                                         ULOG_ERR("failed to swapoff %s (%d)\n", line, err);
1390                         }
1391                 fclose(fp);
1392         } else {
1393                 struct stat s;
1394                 int err;
1395
1396                 if (stat(argv[1], &s) || (!S_ISBLK(s.st_mode) && !S_ISREG(s.st_mode))) {
1397                         ULOG_ERR("%s is not a block device or file\n", argv[1]);
1398                         return -1;
1399                 }
1400                 err = swapoff(argv[1]);
1401                 if (err) {
1402                         ULOG_ERR("failed to swapoff %s (%d)\n", argv[1], err);
1403                         return err;
1404                 }
1405         }
1406
1407         return 0;
1408 }
1409
1410 int main(int argc, char **argv)
1411 {
1412         char *base = basename(*argv);
1413
1414         umask(0);
1415
1416         ulog_open(-1, -1, "block");
1417         ulog_threshold(LOG_NOTICE);
1418
1419         if (!strcmp(base, "swapon"))
1420                 return main_swapon(argc, argv);
1421
1422         if (!strcmp(base, "swapoff"))
1423                 return main_swapoff(argc, argv);
1424
1425         if ((argc > 1) && !strcmp(base, "block")) {
1426                 if (!strcmp(argv[1], "info"))
1427                         return main_info(argc, argv);
1428
1429                 if (!strcmp(argv[1], "detect"))
1430                         return main_detect(argc, argv);
1431
1432                 if (!strcmp(argv[1], "hotplug"))
1433                         return main_hotplug(argc, argv);
1434
1435                 if (!strcmp(argv[1], "extroot"))
1436                         return main_extroot(argc, argv);
1437
1438                 if (!strcmp(argv[1], "mount"))
1439                         return main_mount(argc, argv);
1440
1441                 if (!strcmp(argv[1], "umount"))
1442                         return main_umount(argc, argv);
1443
1444                 if (!strcmp(argv[1], "remount")) {
1445                         int ret = main_umount(argc, argv);
1446
1447                         if (!ret)
1448                                 ret = main_mount(argc, argv);
1449                         return ret;
1450                 }
1451         }
1452
1453         ULOG_ERR("Usage: block <info|mount|umount|detect>\n");
1454
1455         return -1;
1456 }