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 #include <errno.h> 26 #include <fcntl.h> 27 #include <limits.h> 28 29 #include <sys/stat.h> 30 #include <sys/types.h> 31 #include <sys/swap.h> 32 #include <sys/mount.h> 33 #include <sys/wait.h> 34 #include <sys/sysmacros.h> 35 36 #include <linux/fs.h> 37 38 #include <uci.h> 39 #include <uci_blob.h> 40 41 #include <libubox/avl-cmp.h> 42 #include <libubox/blobmsg_json.h> 43 #include <libubox/list.h> 44 #include <libubox/ulog.h> 45 #include <libubox/utils.h> 46 #include <libubox/vlist.h> 47 #include <libubus.h> 48 49 #include "probe.h" 50 51 #define AUTOFS_MOUNT_PATH "/tmp/run/blockd/" 52 53 #ifdef UBIFS_EXTROOT 54 #include "libubi/libubi.h" 55 #endif 56 57 enum { 58 TYPE_MOUNT, 59 TYPE_SWAP, 60 }; 61 62 enum { 63 TYPE_DEV, 64 TYPE_HOTPLUG, 65 TYPE_AUTOFS, 66 }; 67 68 struct mount { 69 struct vlist_node node; 70 int type; 71 72 char *target; 73 char *path; 74 char *options; 75 uint32_t flags; 76 char *uuid; 77 char *label; 78 char *device; 79 int extroot; 80 int autofs; 81 int overlay; 82 int disabled_fsck; 83 unsigned int prio; 84 }; 85 86 static struct vlist_tree mounts; 87 static struct blob_buf b; 88 static LIST_HEAD(devices); 89 static int anon_mount, anon_swap, auto_mount, auto_swap, check_fs; 90 static unsigned int delay_root; 91 92 enum { 93 CFG_ANON_MOUNT, 94 CFG_ANON_SWAP, 95 CFG_AUTO_MOUNT, 96 CFG_AUTO_SWAP, 97 CFG_DELAY_ROOT, 98 CFG_CHECK_FS, 99 __CFG_MAX 100 }; 101 102 static const struct blobmsg_policy config_policy[__CFG_MAX] = { 103 [CFG_ANON_SWAP] = { .name = "anon_swap", .type = BLOBMSG_TYPE_INT32 }, 104 [CFG_ANON_MOUNT] = { .name = "anon_mount", .type = BLOBMSG_TYPE_INT32 }, 105 [CFG_AUTO_SWAP] = { .name = "auto_swap", .type = BLOBMSG_TYPE_INT32 }, 106 [CFG_AUTO_MOUNT] = { .name = "auto_mount", .type = BLOBMSG_TYPE_INT32 }, 107 [CFG_DELAY_ROOT] = { .name = "delay_root", .type = BLOBMSG_TYPE_INT32 }, 108 [CFG_CHECK_FS] = { .name = "check_fs", .type = BLOBMSG_TYPE_INT32 }, 109 }; 110 111 enum { 112 MOUNT_UUID, 113 MOUNT_LABEL, 114 MOUNT_ENABLE, 115 MOUNT_TARGET, 116 MOUNT_DEVICE, 117 MOUNT_OPTIONS, 118 MOUNT_AUTOFS, 119 __MOUNT_MAX 120 }; 121 122 static const struct uci_blob_param_list config_attr_list = { 123 .n_params = __CFG_MAX, 124 .params = config_policy, 125 }; 126 127 static const struct blobmsg_policy mount_policy[__MOUNT_MAX] = { 128 [MOUNT_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING }, 129 [MOUNT_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING }, 130 [MOUNT_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING }, 131 [MOUNT_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING }, 132 [MOUNT_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_STRING }, 133 [MOUNT_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 }, 134 [MOUNT_AUTOFS] = { .name = "autofs", .type = BLOBMSG_TYPE_INT32 }, 135 }; 136 137 static const struct uci_blob_param_list mount_attr_list = { 138 .n_params = __MOUNT_MAX, 139 .params = mount_policy, 140 }; 141 142 enum { 143 SWAP_ENABLE, 144 SWAP_UUID, 145 SWAP_LABEL, 146 SWAP_DEVICE, 147 SWAP_PRIO, 148 __SWAP_MAX 149 }; 150 151 static const struct blobmsg_policy swap_policy[__SWAP_MAX] = { 152 [SWAP_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 }, 153 [SWAP_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING }, 154 [SWAP_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING }, 155 [SWAP_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING }, 156 [SWAP_PRIO] = { .name = "priority", .type = BLOBMSG_TYPE_INT32 }, 157 }; 158 159 static const struct uci_blob_param_list swap_attr_list = { 160 .n_params = __SWAP_MAX, 161 .params = swap_policy, 162 }; 163 164 struct mount_flag { 165 const char *name; 166 int32_t flag; 167 }; 168 169 static const struct mount_flag mount_flags[] = { 170 { "sync", MS_SYNCHRONOUS }, 171 { "async", ~MS_SYNCHRONOUS }, 172 { "dirsync", MS_DIRSYNC }, 173 { "mand", MS_MANDLOCK }, 174 { "nomand", ~MS_MANDLOCK }, 175 { "atime", ~MS_NOATIME }, 176 { "noatime", MS_NOATIME }, 177 { "dev", ~MS_NODEV }, 178 { "nodev", MS_NODEV }, 179 { "diratime", ~MS_NODIRATIME }, 180 { "nodiratime", MS_NODIRATIME }, 181 { "exec", ~MS_NOEXEC }, 182 { "noexec", MS_NOEXEC }, 183 { "suid", ~MS_NOSUID }, 184 { "nosuid", MS_NOSUID }, 185 { "rw", ~MS_RDONLY }, 186 { "ro", MS_RDONLY }, 187 { "relatime", MS_RELATIME }, 188 { "norelatime", ~MS_RELATIME }, 189 { "strictatime", MS_STRICTATIME }, 190 { "acl", MS_POSIXACL }, 191 { "noacl", ~MS_POSIXACL }, 192 { "nouser_xattr", MS_NOUSER }, 193 { "user_xattr", ~MS_NOUSER }, 194 }; 195 196 static char *blobmsg_get_strdup(struct blob_attr *attr) 197 { 198 if (!attr) 199 return NULL; 200 201 return strdup(blobmsg_get_string(attr)); 202 } 203 204 static char *blobmsg_get_basename(struct blob_attr *attr) 205 { 206 if (!attr) 207 return NULL; 208 209 return strdup(basename(blobmsg_get_string(attr))); 210 } 211 212 static void parse_mount_options(struct mount *m, char *optstr) 213 { 214 int i; 215 bool is_flag; 216 char *p, *opts, *last; 217 218 m->flags = 0; 219 m->options = NULL; 220 221 if (!optstr || !*optstr) 222 return; 223 224 m->options = opts = calloc(1, strlen(optstr) + 1); 225 226 if (!m->options) 227 return; 228 229 p = last = optstr; 230 231 do { 232 p = strchr(p, ','); 233 234 if (p) 235 *p++ = 0; 236 237 for (i = 0, is_flag = false; i < ARRAY_SIZE(mount_flags); i++) { 238 if (!strcmp(last, mount_flags[i].name)) { 239 if (mount_flags[i].flag < 0) 240 m->flags &= (uint32_t)mount_flags[i].flag; 241 else 242 m->flags |= (uint32_t)mount_flags[i].flag; 243 is_flag = true; 244 break; 245 } 246 } 247 248 if (!is_flag) 249 opts += sprintf(opts, "%s%s", (opts > m->options) ? "," : "", last); 250 251 last = p; 252 253 } while (p); 254 255 free(optstr); 256 } 257 258 static int mount_add(struct uci_section *s) 259 { 260 struct blob_attr *tb[__MOUNT_MAX] = { 0 }; 261 struct mount *m; 262 263 blob_buf_init(&b, 0); 264 uci_to_blob(&b, s, &mount_attr_list); 265 blobmsg_parse(mount_policy, __MOUNT_MAX, tb, blob_data(b.head), blob_len(b.head)); 266 267 if (!tb[MOUNT_LABEL] && !tb[MOUNT_UUID] && !tb[MOUNT_DEVICE]) 268 return -1; 269 270 if (tb[MOUNT_ENABLE] && !blobmsg_get_u32(tb[MOUNT_ENABLE])) 271 return -1; 272 273 m = malloc(sizeof(struct mount)); 274 m->type = TYPE_MOUNT; 275 m->uuid = blobmsg_get_strdup(tb[MOUNT_UUID]); 276 m->label = blobmsg_get_strdup(tb[MOUNT_LABEL]); 277 m->target = blobmsg_get_strdup(tb[MOUNT_TARGET]); 278 m->device = blobmsg_get_basename(tb[MOUNT_DEVICE]); 279 if (tb[MOUNT_AUTOFS]) 280 m->autofs = blobmsg_get_u32(tb[MOUNT_AUTOFS]); 281 else 282 m->autofs = 0; 283 parse_mount_options(m, blobmsg_get_strdup(tb[MOUNT_OPTIONS])); 284 285 m->overlay = m->extroot = 0; 286 if (m->target && !strcmp(m->target, "/")) 287 m->extroot = 1; 288 if (m->target && !strcmp(m->target, "/overlay")) 289 m->extroot = m->overlay = 1; 290 291 if (m->target && *m->target != '/') { 292 ULOG_WARN("ignoring mount section %s due to invalid target '%s'\n", 293 s->e.name, m->target); 294 free(m); 295 return -1; 296 } 297 298 if (m->uuid) 299 vlist_add(&mounts, &m->node, m->uuid); 300 else if (m->label) 301 vlist_add(&mounts, &m->node, m->label); 302 else if (m->device) 303 vlist_add(&mounts, &m->node, m->device); 304 305 return 0; 306 } 307 308 static int swap_add(struct uci_section *s) 309 { 310 struct blob_attr *tb[__SWAP_MAX] = { 0 }; 311 struct mount *m; 312 313 blob_buf_init(&b, 0); 314 uci_to_blob(&b, s, &swap_attr_list); 315 blobmsg_parse(swap_policy, __SWAP_MAX, tb, blob_data(b.head), blob_len(b.head)); 316 317 if (!tb[SWAP_UUID] && !tb[SWAP_LABEL] && !tb[SWAP_DEVICE]) 318 return -1; 319 320 m = malloc(sizeof(struct mount)); 321 memset(m, 0, sizeof(struct mount)); 322 m->type = TYPE_SWAP; 323 m->uuid = blobmsg_get_strdup(tb[SWAP_UUID]); 324 m->label = blobmsg_get_strdup(tb[SWAP_LABEL]); 325 m->device = blobmsg_get_basename(tb[SWAP_DEVICE]); 326 if (tb[SWAP_PRIO]) 327 m->prio = blobmsg_get_u32(tb[SWAP_PRIO]); 328 if (m->prio) 329 m->prio = ((m->prio << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER; 330 331 if ((!tb[SWAP_ENABLE]) || blobmsg_get_u32(tb[SWAP_ENABLE])) { 332 /* store complete swap path */ 333 if (tb[SWAP_DEVICE]) 334 m->target = blobmsg_get_strdup(tb[SWAP_DEVICE]); 335 336 if (m->uuid) 337 vlist_add(&mounts, &m->node, m->uuid); 338 else if (m->label) 339 vlist_add(&mounts, &m->node, m->label); 340 else if (m->device) 341 vlist_add(&mounts, &m->node, m->device); 342 } 343 344 return 0; 345 } 346 347 static int global_add(struct uci_section *s) 348 { 349 struct blob_attr *tb[__CFG_MAX] = { 0 }; 350 351 blob_buf_init(&b, 0); 352 uci_to_blob(&b, s, &config_attr_list); 353 blobmsg_parse(config_policy, __CFG_MAX, tb, blob_data(b.head), blob_len(b.head)); 354 355 if ((tb[CFG_ANON_MOUNT]) && blobmsg_get_u32(tb[CFG_ANON_MOUNT])) 356 anon_mount = 1; 357 if ((tb[CFG_ANON_SWAP]) && blobmsg_get_u32(tb[CFG_ANON_SWAP])) 358 anon_swap = 1; 359 360 if ((tb[CFG_AUTO_MOUNT]) && blobmsg_get_u32(tb[CFG_AUTO_MOUNT])) 361 auto_mount = 1; 362 if ((tb[CFG_AUTO_SWAP]) && blobmsg_get_u32(tb[CFG_AUTO_SWAP])) 363 auto_swap = 1; 364 365 if (tb[CFG_DELAY_ROOT]) 366 delay_root = blobmsg_get_u32(tb[CFG_DELAY_ROOT]); 367 368 if ((tb[CFG_CHECK_FS]) && blobmsg_get_u32(tb[CFG_CHECK_FS])) 369 check_fs = 1; 370 371 return 0; 372 } 373 374 static struct mount* find_swap(const char *uuid, const char *label, const char *device) 375 { 376 struct mount *m; 377 378 vlist_for_each_element(&mounts, m, node) { 379 if (m->type != TYPE_SWAP) 380 continue; 381 if (uuid && m->uuid && !strcasecmp(m->uuid, uuid)) 382 return m; 383 if (label && m->label && !strcmp(m->label, label)) 384 return m; 385 if (device && m->device && !strcmp(m->device, device)) 386 return m; 387 } 388 389 return NULL; 390 } 391 392 static struct mount* find_block(const char *uuid, const char *label, const char *device, 393 const char *target) 394 { 395 struct mount *m; 396 397 vlist_for_each_element(&mounts, m, node) { 398 if (m->type != TYPE_MOUNT) 399 continue; 400 if (m->uuid && uuid && !strcasecmp(m->uuid, uuid)) 401 return m; 402 if (m->label && label && !strcmp(m->label, label)) 403 return m; 404 if (m->target && target && !strcmp(m->target, target)) 405 return m; 406 if (m->device && device && !strcmp(m->device, device)) 407 return m; 408 } 409 410 return NULL; 411 } 412 413 static void mounts_update(struct vlist_tree *tree, struct vlist_node *node_new, 414 struct vlist_node *node_old) 415 { 416 } 417 418 static struct uci_package * config_try_load(struct uci_context *ctx, char *path) 419 { 420 char *file = basename(path); 421 char *dir = dirname(path); 422 char *err; 423 struct uci_package *pkg; 424 425 uci_set_confdir(ctx, dir); 426 ULOG_INFO("attempting to load %s/%s\n", dir, file); 427 428 if (uci_load(ctx, file, &pkg)) { 429 uci_get_errorstr(ctx, &err, file); 430 ULOG_ERR("unable to load configuration (%s)\n", err); 431 432 free(err); 433 return NULL; 434 } 435 436 return pkg; 437 } 438 439 static int config_load(char *cfg) 440 { 441 struct uci_context *ctx = uci_alloc_context(); 442 struct uci_package *pkg = NULL; 443 struct uci_element *e; 444 char path[64]; 445 446 vlist_init(&mounts, avl_strcmp, mounts_update); 447 448 if (cfg) { 449 snprintf(path, sizeof(path), "%s/upper/etc/config/fstab", cfg); 450 pkg = config_try_load(ctx, path); 451 452 if (!pkg) { 453 snprintf(path, sizeof(path), "%s/etc/config/fstab", cfg); 454 pkg = config_try_load(ctx, path); 455 } 456 } 457 458 if (!pkg) { 459 snprintf(path, sizeof(path), "/etc/config/fstab"); 460 pkg = config_try_load(ctx, path); 461 } 462 463 if (!pkg) { 464 ULOG_ERR("no usable configuration\n"); 465 return -1; 466 } 467 468 vlist_update(&mounts); 469 uci_foreach_element(&pkg->sections, e) { 470 struct uci_section *s = uci_to_section(e); 471 472 if (!strcmp(s->type, "mount")) 473 mount_add(s); 474 if (!strcmp(s->type, "swap")) 475 swap_add(s); 476 if (!strcmp(s->type, "global")) 477 global_add(s); 478 } 479 vlist_flush(&mounts); 480 481 return 0; 482 } 483 484 static struct probe_info* _probe_path(char *path) 485 { 486 struct probe_info *pr; 487 char tmppath[64]; 488 489 /* skip ubi device if ubiblock device is present */ 490 if (path[5] == 'u' && path[6] == 'b' && path[7] == 'i' && 491 path[8] >= '' && path[8] <= '9' ) { 492 snprintf(tmppath, sizeof(tmppath), "/dev/ubiblock%s", path + 8); 493 list_for_each_entry(pr, &devices, list) 494 if (!strcasecmp(pr->dev, tmppath)) 495 return NULL; 496 } 497 498 return probe_path(path); 499 } 500 501 static int _cache_load(const char *path) 502 { 503 int gl_flags = GLOB_NOESCAPE | GLOB_MARK; 504 int j; 505 glob_t gl; 506 507 if (glob(path, gl_flags, NULL, &gl) < 0) 508 return -1; 509 510 for (j = 0; j < gl.gl_pathc; j++) { 511 struct probe_info *pr = _probe_path(gl.gl_pathv[j]); 512 if (pr) 513 list_add_tail(&pr->list, &devices); 514 } 515 516 globfree(&gl); 517 518 return 0; 519 } 520 521 static void cache_load(int mtd) 522 { 523 if (mtd) { 524 _cache_load("/dev/mtdblock*"); 525 _cache_load("/dev/ubiblock*"); 526 _cache_load("/dev/ubi[0-9]*"); 527 } 528 _cache_load("/dev/loop*"); 529 _cache_load("/dev/mmcblk*"); 530 _cache_load("/dev/sd*"); 531 _cache_load("/dev/hd*"); 532 _cache_load("/dev/md*"); 533 _cache_load("/dev/nvme*"); 534 _cache_load("/dev/vd*"); 535 _cache_load("/dev/xvd*"); 536 _cache_load("/dev/mapper/*"); 537 } 538 539 540 static struct probe_info* find_block_info(char *uuid, char *label, char *path) 541 { 542 struct probe_info *pr = NULL; 543 544 if (uuid) 545 list_for_each_entry(pr, &devices, list) 546 if (pr->uuid && !strcasecmp(pr->uuid, uuid)) 547 return pr; 548 549 if (label) 550 list_for_each_entry(pr, &devices, list) 551 if (pr->label && !strcmp(pr->label, label)) 552 return pr; 553 554 if (path) 555 list_for_each_entry(pr, &devices, list) 556 if (pr->dev && !strcmp(basename(pr->dev), basename(path))) 557 return pr; 558 559 return NULL; 560 } 561 562 static char* find_mount_point(char *block) 563 { 564 FILE *fp = fopen("/proc/self/mountinfo", "r"); 565 static char line[256]; 566 char *point = NULL, *pos, *tmp, *cpoint, *devname; 567 struct stat s; 568 int rstat; 569 unsigned int minor, major; 570 571 if (!fp) 572 return NULL; 573 574 rstat = stat(block, &s); 575 576 while (fgets(line, sizeof(line), fp)) { 577 pos = strchr(line, ' '); 578 if (!pos) 579 continue; 580 581 pos = strchr(pos + 1, ' '); 582 if (!pos) 583 continue; 584 585 tmp = ++pos; 586 pos = strchr(pos, ':'); 587 if (!pos) 588 continue; 589 590 *pos = '\0'; 591 major = atoi(tmp); 592 tmp = ++pos; 593 pos = strchr(pos, ' '); 594 if (!pos) 595 continue; 596 597 *pos = '\0'; 598 minor = atoi(tmp); 599 pos = strchr(pos + 1, ' '); 600 if (!pos) 601 continue; 602 tmp = ++pos; 603 604 pos = strchr(pos, ' '); 605 if (!pos) 606 continue; 607 *pos = '\0'; 608 cpoint = tmp; 609 610 pos = strchr(pos + 1, ' '); 611 if (!pos) 612 continue; 613 614 pos = strchr(pos + 1, ' '); 615 if (!pos) 616 continue; 617 618 pos = strchr(pos + 1, ' '); 619 if (!pos) 620 continue; 621 622 tmp = ++pos; 623 pos = strchr(pos, ' '); 624 if (!pos) 625 continue; 626 627 *pos = '\0'; 628 devname = tmp; 629 if (!strcmp(block, devname)) { 630 point = strdup(cpoint); 631 break; 632 } 633 634 if (rstat) 635 continue; 636 637 if (!S_ISBLK(s.st_mode)) 638 continue; 639 640 if (major == major(s.st_rdev) && 641 minor == minor(s.st_rdev)) { 642 point = strdup(cpoint); 643 break; 644 } 645 } 646 647 fclose(fp); 648 649 return point; 650 } 651 652 static int print_block_uci(struct probe_info *pr) 653 { 654 if (!strcmp(pr->type, "swap")) { 655 printf("config 'swap'\n"); 656 } else { 657 char *mp = find_mount_point(pr->dev); 658 659 printf("config 'mount'\n"); 660 if (mp) { 661 printf("\toption\ttarget\t'%s'\n", mp); 662 free(mp); 663 } else { 664 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev)); 665 } 666 } 667 if (pr->uuid) 668 printf("\toption\tuuid\t'%s'\n", pr->uuid); 669 else 670 printf("\toption\tdevice\t'%s'\n", pr->dev); 671 printf("\toption\tenabled\t''\n\n"); 672 673 return 0; 674 } 675 676 static int print_block_info(struct probe_info *pr) 677 { 678 static char *mp; 679 680 mp = find_mount_point(pr->dev); 681 printf("%s:", pr->dev); 682 if (pr->uuid) 683 printf(" UUID=\"%s\"", pr->uuid); 684 685 if (pr->label) 686 printf(" LABEL=\"%s\"", pr->label); 687 688 if (pr->version) 689 printf(" VERSION=\"%s\"", pr->version); 690 691 if (mp) { 692 printf(" MOUNT=\"%s\"", mp); 693 free(mp); 694 } 695 696 printf(" TYPE=\"%s\"\n", pr->type); 697 698 return 0; 699 } 700 701 static void check_filesystem(struct probe_info *pr) 702 { 703 pid_t pid; 704 struct stat statbuf; 705 const char *e2fsck = "/usr/sbin/e2fsck"; 706 const char *f2fsck = "/usr/sbin/fsck.f2fs"; 707 const char *fatfsck = "/usr/sbin/fsck.fat"; 708 const char *btrfsck = "/usr/bin/btrfsck"; 709 const char *ntfsck = "/usr/bin/ntfsfix"; 710 const char *ckfs; 711 712 /* UBIFS does not need stuff like fsck */ 713 if (!strncmp(pr->type, "ubifs", 5)) 714 return; 715 716 if (!strncmp(pr->type, "vfat", 4)) { 717 ckfs = fatfsck; 718 } else if (!strncmp(pr->type, "f2fs", 4)) { 719 ckfs = f2fsck; 720 } else if (!strncmp(pr->type, "ext", 3)) { 721 ckfs = e2fsck; 722 } else if (!strncmp(pr->type, "btrfs", 5)) { 723 ckfs = btrfsck; 724 } else if (!strncmp(pr->type, "ntfs", 4)) { 725 ckfs = ntfsck; 726 } else { 727 ULOG_ERR("check_filesystem: %s is not supported\n", pr->type); 728 return; 729 } 730 731 if (stat(ckfs, &statbuf) < 0) { 732 ULOG_ERR("check_filesystem: %s not found\n", ckfs); 733 return; 734 } 735 736 pid = fork(); 737 if (!pid) { 738 if(!strncmp(pr->type, "f2fs", 4)) { 739 execl(ckfs, ckfs, "-f", pr->dev, NULL); 740 exit(EXIT_FAILURE); 741 } else if(!strncmp(pr->type, "btrfs", 5)) { 742 execl(ckfs, ckfs, "--repair", pr->dev, NULL); 743 exit(EXIT_FAILURE); 744 } else if(!strncmp(pr->type, "ntfs", 4)) { 745 execl(ckfs, ckfs, "-b", pr->dev, NULL); 746 exit(EXIT_FAILURE); 747 } else { 748 execl(ckfs, ckfs, "-p", pr->dev, NULL); 749 exit(EXIT_FAILURE); 750 } 751 } else if (pid > 0) { 752 int status; 753 754 waitpid(pid, &status, 0); 755 if (WIFEXITED(status) && WEXITSTATUS(status)) 756 ULOG_ERR("check_filesystem: %s returned %d\n", ckfs, WEXITSTATUS(status)); 757 if (WIFSIGNALED(status)) 758 ULOG_ERR("check_filesystem: %s terminated by %s\n", ckfs, strsignal(WTERMSIG(status))); 759 } 760 } 761 762 static void handle_swapfiles(bool on) 763 { 764 struct stat s; 765 struct mount *m; 766 struct probe_info *pr; 767 768 vlist_for_each_element(&mounts, m, node) 769 { 770 if (m->type != TYPE_SWAP || !m->target) 771 continue; 772 773 if (stat(m->target, &s) || !S_ISREG(s.st_mode)) 774 continue; 775 776 pr = _probe_path(m->target); 777 778 if (!pr) 779 continue; 780 781 if (!strcmp(pr->type, "swap")) { 782 if (on) 783 swapon(pr->dev, m->prio); 784 else 785 swapoff(pr->dev); 786 } 787 788 free(pr); 789 } 790 } 791 792 static void to_devnull(int fd) 793 { 794 int devnull = open("/dev/null", fd ? O_WRONLY : O_RDONLY); 795 796 if (devnull >= 0) 797 dup2(devnull, fd); 798 799 if (devnull > STDERR_FILENO) 800 close(devnull); 801 } 802 803 static int exec_mount(const char *source, const char *target, 804 const char *fstype, const char *options) 805 { 806 pid_t pid; 807 struct stat s; 808 FILE *mount_fd; 809 int err, status, pfds[2]; 810 char errmsg[128], cmd[sizeof("/sbin/mount.XXXXXXXXXXXXXXXX\0")]; 811 812 snprintf(cmd, sizeof(cmd), "/sbin/mount.%s", fstype); 813 814 if (stat(cmd, &s) < 0 || !S_ISREG(s.st_mode) || !(s.st_mode & S_IXUSR)) { 815 ULOG_ERR("No \"mount.%s\" utility available\n", fstype); 816 return -1; 817 } 818 819 if (pipe(pfds) < 0) 820 return -1; 821 822 fcntl(pfds[0], F_SETFD, fcntl(pfds[0], F_GETFD) | FD_CLOEXEC); 823 fcntl(pfds[1], F_SETFD, fcntl(pfds[1], F_GETFD) | FD_CLOEXEC); 824 825 pid = vfork(); 826 827 switch (pid) { 828 case -1: 829 close(pfds[0]); 830 close(pfds[1]); 831 832 return -1; 833 834 case 0: 835 to_devnull(STDIN_FILENO); 836 to_devnull(STDOUT_FILENO); 837 838 dup2(pfds[1], STDERR_FILENO); 839 close(pfds[0]); 840 close(pfds[1]); 841 842 if (options && *options) 843 execl(cmd, cmd, "-o", options, source, target, NULL); 844 else 845 execl(cmd, cmd, source, target, NULL); 846 847 return -1; 848 849 default: 850 close(pfds[1]); 851 852 mount_fd = fdopen(pfds[0], "r"); 853 854 while (fgets(errmsg, sizeof(errmsg), mount_fd)) 855 ULOG_ERR("mount.%s: %s", fstype, errmsg); 856 857 fclose(mount_fd); 858 859 err = waitpid(pid, &status, 0); 860 861 if (err != -1) { 862 if (status != 0) { 863 ULOG_ERR("mount.%s: failed with status %d\n", fstype, status); 864 errno = EINVAL; 865 err = -1; 866 } else { 867 errno = 0; 868 err = 0; 869 } 870 } 871 872 break; 873 } 874 875 return err; 876 } 877 878 static int handle_mount(const char *source, const char *target, 879 const char *fstype, struct mount *m) 880 { 881 int i, err; 882 size_t mount_opts_len; 883 char *mount_opts = NULL, *ptr; 884 885 err = mount(source, target, fstype, m ? m->flags : 0, 886 (m && m->options) ? m->options : ""); 887 888 /* Requested file system type is not available in kernel, 889 attempt to call mount helper. */ 890 if (err == -1 && errno == ENODEV) { 891 if (m) { 892 /* Convert mount flags back into string representation, 893 first calculate needed length of string buffer... */ 894 mount_opts_len = 1 + (m->options ? strlen(m->options) : 0); 895 896 for (i = 0; i < ARRAY_SIZE(mount_flags); i++) 897 if ((mount_flags[i].flag > 0) && 898 (mount_flags[i].flag < INT_MAX) && 899 (m->flags & (uint32_t)mount_flags[i].flag)) 900 mount_opts_len += strlen(mount_flags[i].name) + 1; 901 902 /* ... then now allocate and fill it ... */ 903 ptr = mount_opts = calloc(1, mount_opts_len); 904 905 if (!ptr) { 906 errno = ENOMEM; 907 return -1; 908 } 909 910 if (m->options) 911 ptr += sprintf(ptr, "%s,", m->options); 912 913 for (i = 0; i < ARRAY_SIZE(mount_flags); i++) 914 if ((mount_flags[i].flag > 0) && 915 (mount_flags[i].flag < INT_MAX) && 916 (m->flags & (uint32_t)mount_flags[i].flag)) 917 ptr += sprintf(ptr, "%s,", mount_flags[i].name); 918 919 mount_opts[mount_opts_len - 1] = 0; 920 } 921 922 /* ... and now finally invoke the external mount program */ 923 err = exec_mount(source, target, fstype, mount_opts); 924 } 925 926 return err; 927 } 928 929 static int blockd_notify(const char *method, char *device, struct mount *m, 930 struct probe_info *pr) 931 { 932 struct ubus_context *ctx = ubus_connect(NULL); 933 uint32_t id; 934 int err; 935 936 if (!ctx) 937 return -ENXIO; 938 939 if (!ubus_lookup_id(ctx, "block", &id)) { 940 struct blob_buf buf = { 0 }; 941 char *d = strrchr(device, '/'); 942 943 if (d) 944 d++; 945 else 946 d = device; 947 948 blob_buf_init(&buf, 0); 949 950 if (m) { 951 952 blobmsg_add_string(&buf, "device", d); 953 if (m->uuid) 954 blobmsg_add_string(&buf, "uuid", m->uuid); 955 if (m->label) 956 blobmsg_add_string(&buf, "label", m->label); 957 if (m->target) 958 blobmsg_add_string(&buf, "target", m->target); 959 if (m->options) 960 blobmsg_add_string(&buf, "options", m->options); 961 if (m->autofs) 962 blobmsg_add_u32(&buf, "autofs", m->autofs); 963 if (pr->type) 964 blobmsg_add_string(&buf, "type", pr->type); 965 if (pr->version) 966 blobmsg_add_string(&buf, "version", pr->version); 967 } else if (pr) { 968 blobmsg_add_string(&buf, "device", d); 969 if (pr->uuid) 970 blobmsg_add_string(&buf, "uuid", pr->uuid); 971 if (pr->label) 972 blobmsg_add_string(&buf, "label", pr->label); 973 if (pr->type) 974 blobmsg_add_string(&buf, "type", pr->type); 975 if (pr->version) 976 blobmsg_add_string(&buf, "version", pr->version); 977 blobmsg_add_u32(&buf, "anon", 1); 978 } else { 979 blobmsg_add_string(&buf, "device", d); 980 blobmsg_add_u32(&buf, "remove", 1); 981 } 982 983 err = ubus_invoke(ctx, id, method, buf.head, NULL, NULL, 3000); 984 } else { 985 err = -ENOENT; 986 } 987 988 ubus_free(ctx); 989 990 return err; 991 } 992 993 static int mount_device(struct probe_info *pr, int type) 994 { 995 struct mount *m; 996 struct stat st; 997 char _target[32]; 998 char *target; 999 char *device; 1000 char *mp; 1001 int err; 1002 1003 if (!pr) 1004 return -1; 1005 1006 device = basename(pr->dev); 1007 1008 if (!strcmp(pr->type, "swap")) { 1009 if ((type == TYPE_HOTPLUG) && !auto_swap) 1010 return -1; 1011 m = find_swap(pr->uuid, pr->label, device); 1012 if (m || anon_swap) 1013 swapon(pr->dev, (m) ? (m->prio) : (0)); 1014 1015 return 0; 1016 } 1017 1018 m = find_block(pr->uuid, pr->label, device, NULL); 1019 if (m && m->extroot) 1020 return -1; 1021 1022 mp = find_mount_point(pr->dev); 1023 if (mp) { 1024 if (m && m->type == TYPE_MOUNT && strcmp(m->target, mp)) { 1025 ULOG_ERR("%s is already mounted on %s\n", pr->dev, mp); 1026 err = -1; 1027 } else 1028 err = 0; 1029 free(mp); 1030 return err; 1031 } 1032 1033 if (type == TYPE_HOTPLUG) 1034 blockd_notify("hotplug", device, m, pr); 1035 1036 /* Check if device should be mounted & set the target directory */ 1037 if (m) { 1038 switch (type) { 1039 case TYPE_HOTPLUG: 1040 if (m->autofs) 1041 return 0; 1042 if (!auto_mount) 1043 return -1; 1044 break; 1045 case TYPE_AUTOFS: 1046 if (!m->autofs) 1047 return -1; 1048 break; 1049 case TYPE_DEV: 1050 if (m->autofs) 1051 return -1; 1052 break; 1053 } 1054 1055 if (m->autofs) { 1056 snprintf(_target, sizeof(_target), "/tmp/run/blockd/%s", device); 1057 target = _target; 1058 } else if (m->target) { 1059 target = m->target; 1060 } else { 1061 snprintf(_target, sizeof(_target), "/mnt/%s", device); 1062 target = _target; 1063 } 1064 } else if (anon_mount) { 1065 snprintf(_target, sizeof(_target), "/mnt/%s", device); 1066 target = _target; 1067 } else { 1068 /* No reason to mount this device */ 1069 return 0; 1070 } 1071 1072 /* Mount the device */ 1073 1074 if (check_fs) 1075 check_filesystem(pr); 1076 1077 mkdir_p(target, 0755); 1078 if (!lstat(target, &st) && S_ISLNK(st.st_mode)) 1079 unlink(target); 1080 1081 err = handle_mount(pr->dev, target, pr->type, m); 1082 if (err) { 1083 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %m\n", 1084 pr->dev, pr->type, target, errno); 1085 return err; 1086 } 1087 1088 handle_swapfiles(true); 1089 1090 if (type != TYPE_AUTOFS) 1091 blockd_notify("mount", device, NULL, NULL); 1092 1093 return 0; 1094 } 1095 1096 static int umount_device(char *path, int type, bool all) 1097 { 1098 char *mp; 1099 int err; 1100 1101 mp = find_mount_point(path); 1102 if (!mp) 1103 return -1; 1104 if (!strcmp(mp, "/") && !all) 1105 return 0; 1106 1107 if (type != TYPE_AUTOFS) 1108 blockd_notify("umount", basename(path), NULL, NULL); 1109 1110 err = umount2(mp, MNT_DETACH); 1111 if (err) { 1112 ULOG_ERR("unmounting %s (%s) failed (%d) - %m\n", path, mp, 1113 errno); 1114 } else { 1115 ULOG_INFO("unmounted %s (%s)\n", path, mp); 1116 rmdir(mp); 1117 } 1118 1119 free(mp); 1120 return err; 1121 } 1122 1123 static int mount_action(char *action, char *device, int type) 1124 { 1125 char path[32]; 1126 1127 if (!action || !device) 1128 return -1; 1129 snprintf(path, sizeof(path), "/dev/%s", device); 1130 1131 if (!strcmp(action, "remove")) { 1132 if (type == TYPE_HOTPLUG) 1133 blockd_notify("hotplug", device, NULL, NULL); 1134 1135 umount_device(path, type, true); 1136 1137 return 0; 1138 } else if (strcmp(action, "add")) { 1139 ULOG_ERR("Unkown action %s\n", action); 1140 1141 return -1; 1142 } 1143 1144 if (config_load(NULL)) 1145 return -1; 1146 cache_load(0); 1147 1148 return mount_device(find_block_info(NULL, NULL, path), type); 1149 } 1150 1151 static int main_hotplug(int argc, char **argv) 1152 { 1153 return mount_action(getenv("ACTION"), getenv("DEVNAME"), TYPE_HOTPLUG); 1154 } 1155 1156 static int main_autofs(int argc, char **argv) 1157 { 1158 int err = 0; 1159 1160 if (argc < 3) 1161 return -1; 1162 1163 if (!strcmp(argv[2], "start")) { 1164 struct probe_info *pr; 1165 1166 if (config_load(NULL)) 1167 return -1; 1168 1169 cache_load(0); 1170 list_for_each_entry(pr, &devices, list) { 1171 struct mount *m; 1172 char *mp; 1173 1174 if (!strcmp(pr->type, "swap")) 1175 continue; 1176 1177 m = find_block(pr->uuid, pr->label, NULL, NULL); 1178 if (m && m->extroot) 1179 continue; 1180 1181 blockd_notify("hotplug", pr->dev, m, pr); 1182 if ((!m || !m->autofs) && (mp = find_mount_point(pr->dev))) { 1183 blockd_notify("mount", pr->dev, NULL, NULL); 1184 free(mp); 1185 } 1186 } 1187 } else { 1188 if (argc < 4) 1189 return -EINVAL; 1190 1191 err = mount_action(argv[2], argv[3], TYPE_AUTOFS); 1192 } 1193 1194 if (err) { 1195 ULOG_ERR("autofs: \"%s\" action has failed: %d\n", argv[2], err); 1196 } 1197 1198 return err; 1199 } 1200 1201 static int find_block_mtd(char *name, char *part, int plen) 1202 { 1203 FILE *fp = fopen("/proc/mtd", "r"); 1204 static char line[256]; 1205 char *index = NULL; 1206 1207 if(!fp) 1208 return -1; 1209 1210 while (!index && fgets(line, sizeof(line), fp)) { 1211 if (strstr(line, name)) { 1212 char *eol = strstr(line, ":"); 1213 1214 if (!eol) 1215 continue; 1216 1217 *eol = '\0'; 1218 index = &line[3]; 1219 } 1220 } 1221 1222 fclose(fp); 1223 1224 if (!index) 1225 return -1; 1226 1227 snprintf(part, plen, "/dev/mtdblock%s", index); 1228 1229 return 0; 1230 } 1231 1232 #ifdef UBIFS_EXTROOT 1233 static int find_ubi_vol(libubi_t libubi, char *name, int *dev_num, int *vol_id) 1234 { 1235 int dev = 0; 1236 1237 while (ubi_dev_present(libubi, dev)) 1238 { 1239 struct ubi_dev_info dev_info; 1240 struct ubi_vol_info vol_info; 1241 1242 if (ubi_get_dev_info1(libubi, dev++, &dev_info)) 1243 continue; 1244 if (ubi_get_vol_info1_nm(libubi, dev_info.dev_num, name, &vol_info)) 1245 continue; 1246 1247 *dev_num = dev_info.dev_num; 1248 *vol_id = vol_info.vol_id; 1249 1250 return 0; 1251 } 1252 1253 return -1; 1254 } 1255 1256 static int find_block_ubi(libubi_t libubi, char *name, char *part, int plen) 1257 { 1258 int dev_num; 1259 int vol_id; 1260 int err = -1; 1261 1262 err = find_ubi_vol(libubi, name, &dev_num, &vol_id); 1263 if (!err) 1264 snprintf(part, plen, "/dev/ubi%d_%d", dev_num, vol_id); 1265 1266 return err; 1267 } 1268 1269 static int find_block_ubi_RO(libubi_t libubi, char *name, char *part, int plen) 1270 { 1271 int dev_num; 1272 int vol_id; 1273 int err = -1; 1274 1275 err = find_ubi_vol(libubi, name, &dev_num, &vol_id); 1276 if (!err) 1277 snprintf(part, plen, "/dev/ubiblock%d_%d", dev_num, vol_id); 1278 1279 return err; 1280 } 1281 #endif 1282 1283 static int find_root_dev(char *buf, int len) 1284 { 1285 DIR *d; 1286 dev_t root; 1287 struct stat s; 1288 struct dirent *e; 1289 1290 if (stat("/", &s)) 1291 return -1; 1292 1293 if (!(d = opendir("/dev"))) 1294 return -1; 1295 1296 root = s.st_dev; 1297 1298 while ((e = readdir(d)) != NULL) { 1299 snprintf(buf, len, "/dev/%s", e->d_name); 1300 1301 if (stat(buf, &s) || s.st_rdev != root) 1302 continue; 1303 1304 closedir(d); 1305 return 0; 1306 } 1307 1308 closedir(d); 1309 return -1; 1310 } 1311 1312 static int test_fs_support(const char *name) 1313 { 1314 char line[128], *p; 1315 int rv = -1; 1316 FILE *f; 1317 1318 if ((f = fopen("/proc/filesystems", "r")) != NULL) { 1319 while (fgets(line, sizeof(line), f)) { 1320 p = strtok(line, "\t\n"); 1321 1322 if (p && !strcmp(p, "nodev")) 1323 p = strtok(NULL, "\t\n"); 1324 1325 if (p && !strcmp(p, name)) { 1326 rv = 0; 1327 break; 1328 } 1329 } 1330 fclose(f); 1331 } 1332 1333 return rv; 1334 } 1335 1336 /** 1337 * Check if mounted partition is a valid extroot 1338 * 1339 * @path target mount point 1340 * 1341 * Valid extroot partition has to contain /etc/.extroot-uuid with UUID of root 1342 * device. This function reads UUID and verifies it OR writes UUID to 1343 * .extroot-uuid if it doesn't exist yet (first extroot usage). 1344 */ 1345 static int check_extroot(char *path) 1346 { 1347 struct probe_info *pr = NULL; 1348 struct probe_info *tmp; 1349 struct stat s; 1350 char uuid[64] = { 0 }; 1351 char devpath[32]; 1352 char tag[64]; 1353 FILE *fp; 1354 int err; 1355 1356 err = find_block_mtd("\"rootfs\"", devpath, sizeof(devpath)); 1357 #ifdef UBIFS_EXTROOT 1358 if (err) { 1359 libubi_t libubi; 1360 1361 libubi = libubi_open(); 1362 err = find_block_ubi_RO(libubi, "rootfs", devpath, sizeof(devpath)); 1363 libubi_close(libubi); 1364 } 1365 #endif 1366 if (err) { 1367 err = find_root_dev(devpath, sizeof(devpath)); 1368 } 1369 if (err) { 1370 ULOG_ERR("extroot: unable to determine root device\n"); 1371 return -1; 1372 } 1373 1374 /* Find root device probe_info so we know its UUID */ 1375 list_for_each_entry(tmp, &devices, list) { 1376 if (!strcmp(tmp->dev, devpath)) { 1377 pr = tmp; 1378 break; 1379 } 1380 } 1381 if (!pr) { 1382 ULOG_ERR("extroot: unable to lookup root device %s\n", devpath); 1383 return -1; 1384 } 1385 1386 snprintf(tag, sizeof(tag), "%s/etc", path); 1387 if (stat(tag, &s)) 1388 mkdir_p(tag, 0755); 1389 1390 snprintf(tag, sizeof(tag), "%s/etc/.extroot-uuid", path); 1391 if (stat(tag, &s)) { 1392 fp = fopen(tag, "w+"); 1393 if (!fp) { 1394 ULOG_ERR("extroot: failed to write UUID to %s: %d (%m)\n", 1395 tag, errno); 1396 /* return 0 to continue boot regardless of error */ 1397 return 0; 1398 } 1399 fputs(pr->uuid, fp); 1400 fclose(fp); 1401 return 0; 1402 } 1403 1404 fp = fopen(tag, "r"); 1405 if (!fp) { 1406 ULOG_ERR("extroot: failed to read UUID from %s: %d (%m)\n", tag, 1407 errno); 1408 return -1; 1409 } 1410 1411 if (!fgets(uuid, sizeof(uuid), fp)) 1412 ULOG_ERR("extroot: failed to read UUID from %s: %d (%m)\n", tag, 1413 errno); 1414 fclose(fp); 1415 1416 if (*uuid && !strcasecmp(uuid, pr->uuid)) 1417 return 0; 1418 1419 ULOG_ERR("extroot: UUID mismatch (root: %s, %s: %s)\n", pr->uuid, 1420 basename(path), uuid); 1421 return -1; 1422 } 1423 1424 /* 1425 * Read info about extroot from UCI (using prefix) and mount it. 1426 */ 1427 static int mount_extroot(char *cfg) 1428 { 1429 char overlay[] = "/tmp/extroot/overlay"; 1430 char mnt[] = "/tmp/extroot/mnt"; 1431 char *path = mnt; 1432 struct probe_info *pr; 1433 struct mount *m; 1434 int err = -1; 1435 1436 /* Load @cfg/etc/config/fstab */ 1437 if (config_load(cfg)) 1438 return -2; 1439 1440 /* See if there is extroot-specific mount config */ 1441 m = find_block(NULL, NULL, NULL, "/"); 1442 if (!m) 1443 m = find_block(NULL, NULL, NULL, "/overlay"); 1444 1445 if (!m || !m->extroot) 1446 { 1447 ULOG_INFO("extroot: not configured\n"); 1448 return -1; 1449 } 1450 1451 /* Find block device pointed by the mount config */ 1452 pr = find_block_info(m->uuid, m->label, m->device); 1453 1454 if (!pr && delay_root){ 1455 ULOG_INFO("extroot: device not present, retrying in %u seconds\n", delay_root); 1456 sleep(delay_root); 1457 make_devs(); 1458 cache_load(1); 1459 pr = find_block_info(m->uuid, m->label, m->device); 1460 } 1461 if (pr) { 1462 if (strncmp(pr->type, "ext", 3) && 1463 strncmp(pr->type, "f2fs", 4) && 1464 strncmp(pr->type, "btrfs", 5) && 1465 strncmp(pr->type, "ntfs", 4) && 1466 strncmp(pr->type, "ubifs", 5)) { 1467 ULOG_ERR("extroot: unsupported filesystem %s, try ext4, f2fs, btrfs, ntfs or ubifs\n", pr->type); 1468 return -1; 1469 } 1470 1471 if (test_fs_support(pr->type)) { 1472 ULOG_ERR("extroot: filesystem %s not supported by kernel\n", pr->type); 1473 return -1; 1474 } 1475 1476 if (m->overlay) 1477 path = overlay; 1478 mkdir_p(path, 0755); 1479 1480 if (check_fs) 1481 check_filesystem(pr); 1482 1483 err = mount(pr->dev, path, pr->type, m->flags, 1484 (m->options) ? (m->options) : ("")); 1485 1486 if (err) { 1487 ULOG_ERR("extroot: mounting %s (%s) on %s failed: %d (%m)\n", 1488 pr->dev, pr->type, path, errno); 1489 } else if (m->overlay) { 1490 err = check_extroot(path); 1491 if (err) 1492 umount(path); 1493 } 1494 } else { 1495 ULOG_ERR("extroot: cannot find device %s%s\n", 1496 (m->uuid ? "with UUID " : (m->label ? "with label " : "")), 1497 (m->uuid ? m->uuid : (m->label ? m->label : m->device))); 1498 } 1499 1500 return err; 1501 } 1502 1503 /** 1504 * Look for extroot config and mount it if present 1505 * 1506 * Look for /etc/config/fstab on all supported partitions and use it for 1507 * mounting extroot if specified. 1508 */ 1509 static int main_extroot(int argc, char **argv) 1510 { 1511 struct probe_info *pr; 1512 char blkdev_path[32] = { 0 }; 1513 int err = -1; 1514 #ifdef UBIFS_EXTROOT 1515 libubi_t libubi; 1516 #endif 1517 1518 if (!getenv("PREINIT")) 1519 return -1; 1520 1521 if (argc != 2) { 1522 ULOG_ERR("Usage: block extroot\n"); 1523 return -1; 1524 } 1525 1526 make_devs(); 1527 cache_load(1); 1528 1529 /* enable LOG_INFO messages */ 1530 ulog_threshold(LOG_INFO); 1531 1532 /* 1533 * Look for "rootfs_data". We will want to mount it and check for 1534 * extroot configuration. 1535 */ 1536 1537 /* Start with looking for MTD partition */ 1538 find_block_mtd("\"rootfs_data\"", blkdev_path, sizeof(blkdev_path)); 1539 if (blkdev_path[0]) { 1540 pr = find_block_info(NULL, NULL, blkdev_path); 1541 if (pr && !strcmp(pr->type, "jffs2")) { 1542 char cfg[] = "/tmp/jffs_cfg"; 1543 1544 /* 1545 * Mount MTD part and try extroot (using 1546 * /etc/config/fstab from that partition) 1547 */ 1548 mkdir_p(cfg, 0755); 1549 if (!mount(blkdev_path, cfg, "jffs2", MS_NOATIME, NULL)) { 1550 err = mount_extroot(cfg); 1551 umount2(cfg, MNT_DETACH); 1552 } 1553 if (err < 0) 1554 rmdir("/tmp/overlay"); 1555 rmdir(cfg); 1556 return err; 1557 } 1558 } 1559 1560 #ifdef UBIFS_EXTROOT 1561 /* ... but it also could be an UBI volume */ 1562 memset(blkdev_path, 0, sizeof(blkdev_path)); 1563 libubi = libubi_open(); 1564 find_block_ubi(libubi, "rootfs_data", blkdev_path, sizeof(blkdev_path)); 1565 libubi_close(libubi); 1566 if (blkdev_path[0]) { 1567 char cfg[] = "/tmp/ubifs_cfg"; 1568 1569 /* Mount volume and try extroot (using fstab from that vol) */ 1570 mkdir_p(cfg, 0755); 1571 if (!mount(blkdev_path, cfg, "ubifs", MS_NOATIME, NULL)) { 1572 err = mount_extroot(cfg); 1573 umount2(cfg, MNT_DETACH); 1574 } 1575 if (err < 0) 1576 rmdir("/tmp/overlay"); 1577 rmdir(cfg); 1578 return err; 1579 } 1580 #endif 1581 1582 /* As a last resort look for /etc/config/fstab on "rootfs" partition */ 1583 return mount_extroot(NULL); 1584 } 1585 1586 static int main_mount(int argc, char **argv) 1587 { 1588 struct probe_info *pr; 1589 1590 if (config_load(NULL)) 1591 return -1; 1592 1593 cache_load(1); 1594 list_for_each_entry(pr, &devices, list) 1595 mount_device(pr, TYPE_DEV); 1596 1597 handle_swapfiles(true); 1598 1599 return 0; 1600 } 1601 1602 static int main_umount(int argc, char **argv) 1603 { 1604 struct probe_info *pr; 1605 bool all = false; 1606 1607 if (config_load(NULL)) 1608 return -1; 1609 1610 handle_swapfiles(false); 1611 1612 cache_load(0); 1613 1614 if (argc == 3) 1615 all = !strcmp(argv[2], "-a"); 1616 1617 list_for_each_entry(pr, &devices, list) { 1618 struct mount *m; 1619 1620 if (!strcmp(pr->type, "swap")) 1621 continue; 1622 1623 m = find_block(pr->uuid, pr->label, basename(pr->dev), NULL); 1624 if (m && m->extroot) 1625 continue; 1626 1627 umount_device(pr->dev, TYPE_DEV, all); 1628 } 1629 1630 return 0; 1631 } 1632 1633 static int main_detect(int argc, char **argv) 1634 { 1635 struct probe_info *pr; 1636 1637 cache_load(0); 1638 printf("config 'global'\n"); 1639 printf("\toption\tanon_swap\t''\n"); 1640 printf("\toption\tanon_mount\t''\n"); 1641 printf("\toption\tauto_swap\t'1'\n"); 1642 printf("\toption\tauto_mount\t'1'\n"); 1643 printf("\toption\tdelay_root\t'5'\n"); 1644 printf("\toption\tcheck_fs\t''\n\n"); 1645 list_for_each_entry(pr, &devices, list) 1646 print_block_uci(pr); 1647 1648 return 0; 1649 } 1650 1651 static int main_info(int argc, char **argv) 1652 { 1653 int i; 1654 struct probe_info *pr; 1655 1656 cache_load(1); 1657 if (argc == 2) { 1658 list_for_each_entry(pr, &devices, list) 1659 print_block_info(pr); 1660 1661 return 0; 1662 }; 1663 1664 for (i = 2; i < argc; i++) { 1665 struct stat s; 1666 1667 if (stat(argv[i], &s)) { 1668 ULOG_ERR("failed to stat %s\n", argv[i]); 1669 continue; 1670 } 1671 if (!S_ISBLK(s.st_mode) && !(S_ISCHR(s.st_mode) && major(s.st_rdev) == 250)) { 1672 ULOG_ERR("%s is not a block device\n", argv[i]); 1673 continue; 1674 } 1675 pr = find_block_info(NULL, NULL, argv[i]); 1676 if (pr) 1677 print_block_info(pr); 1678 } 1679 1680 return 0; 1681 } 1682 1683 static int swapon_usage(void) 1684 { 1685 fprintf(stderr, "Usage: swapon [-s] [-a] [[-p pri] DEVICE]\n\n" 1686 "\tStart swapping on [DEVICE]\n" 1687 " -a\tStart swapping on all swap devices\n" 1688 " -p pri\tSet priority of swap device\n" 1689 " -s\tShow summary\n"); 1690 return -1; 1691 } 1692 1693 static int main_swapon(int argc, char **argv) 1694 { 1695 int ch; 1696 FILE *fp; 1697 char *lineptr; 1698 size_t s; 1699 struct probe_info *pr; 1700 int flags = 0; 1701 int pri; 1702 struct stat st; 1703 int err; 1704 1705 while ((ch = getopt(argc, argv, "ap:s")) != -1) { 1706 switch(ch) { 1707 case 's': 1708 fp = fopen("/proc/swaps", "r"); 1709 lineptr = NULL; 1710 1711 if (!fp) { 1712 ULOG_ERR("failed to open /proc/swaps\n"); 1713 return -1; 1714 } 1715 while (getline(&lineptr, &s, fp) > 0) 1716 printf("%s", lineptr); 1717 if (lineptr) 1718 free(lineptr); 1719 fclose(fp); 1720 return 0; 1721 case 'a': 1722 cache_load(0); 1723 list_for_each_entry(pr, &devices, list) { 1724 if (strcmp(pr->type, "swap")) 1725 continue; 1726 if (swapon(pr->dev, 0)) 1727 ULOG_ERR("failed to swapon %s\n", pr->dev); 1728 } 1729 return 0; 1730 case 'p': 1731 pri = atoi(optarg); 1732 if (pri >= 0) 1733 flags = ((pri << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER; 1734 break; 1735 default: 1736 return swapon_usage(); 1737 } 1738 } 1739 1740 if (optind != (argc - 1)) 1741 return swapon_usage(); 1742 1743 if (stat(argv[optind], &st) || (!S_ISBLK(st.st_mode) && !S_ISREG(st.st_mode))) { 1744 ULOG_ERR("%s is not a block device or file\n", argv[optind]); 1745 return -1; 1746 } 1747 err = swapon(argv[optind], flags); 1748 if (err) { 1749 ULOG_ERR("failed to swapon %s (%d)\n", argv[optind], err); 1750 return err; 1751 } 1752 1753 return 0; 1754 } 1755 1756 static int main_swapoff(int argc, char **argv) 1757 { 1758 if (argc != 2) { 1759 ULOG_ERR("Usage: swapoff [-a] [DEVICE]\n\n" 1760 "\tStop swapping on DEVICE\n" 1761 " -a\tStop swapping on all swap devices\n"); 1762 return -1; 1763 } 1764 1765 if (!strcmp(argv[1], "-a")) { 1766 FILE *fp = fopen("/proc/swaps", "r"); 1767 char line[256]; 1768 1769 if (!fp) { 1770 ULOG_ERR("failed to open /proc/swaps\n"); 1771 return -1; 1772 } 1773 if (fgets(line, sizeof(line), fp)) 1774 while (fgets(line, sizeof(line), fp)) { 1775 char *end = strchr(line, ' '); 1776 int err; 1777 1778 if (!end) 1779 continue; 1780 *end = '\0'; 1781 err = swapoff(line); 1782 if (err) 1783 ULOG_ERR("failed to swapoff %s (%d)\n", line, err); 1784 } 1785 fclose(fp); 1786 } else { 1787 struct stat s; 1788 int err; 1789 1790 if (stat(argv[1], &s) || (!S_ISBLK(s.st_mode) && !S_ISREG(s.st_mode))) { 1791 ULOG_ERR("%s is not a block device or file\n", argv[1]); 1792 return -1; 1793 } 1794 err = swapoff(argv[1]); 1795 if (err) { 1796 ULOG_ERR("failed to swapoff %s (%d)\n", argv[1], err); 1797 return err; 1798 } 1799 } 1800 1801 return 0; 1802 } 1803 1804 int main(int argc, char **argv) 1805 { 1806 char *base = basename(*argv); 1807 1808 umask(0); 1809 1810 ulog_open(-1, -1, "block"); 1811 ulog_threshold(LOG_NOTICE); 1812 1813 if (!strcmp(base, "swapon")) 1814 return main_swapon(argc, argv); 1815 1816 if (!strcmp(base, "swapoff")) 1817 return main_swapoff(argc, argv); 1818 1819 if ((argc > 1) && !strcmp(base, "block")) { 1820 if (!strcmp(argv[1], "info")) 1821 return main_info(argc, argv); 1822 1823 if (!strcmp(argv[1], "detect")) 1824 return main_detect(argc, argv); 1825 1826 if (!strcmp(argv[1], "hotplug")) 1827 return main_hotplug(argc, argv); 1828 1829 if (!strcmp(argv[1], "autofs")) 1830 return main_autofs(argc, argv); 1831 1832 if (!strcmp(argv[1], "extroot")) 1833 return main_extroot(argc, argv); 1834 1835 if (!strcmp(argv[1], "mount")) 1836 return main_mount(argc, argv); 1837 1838 if (!strcmp(argv[1], "umount")) 1839 return main_umount(argc, argv); 1840 1841 if (!strcmp(argv[1], "remount")) { 1842 int ret = main_umount(argc, argv); 1843 1844 if (!ret) 1845 ret = main_mount(argc, argv); 1846 return ret; 1847 } 1848 } 1849 1850 ULOG_ERR("Usage: block <info|mount|umount|detect>\n"); 1851 1852 return -1; 1853 } 1854
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