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, *epr; 487 char tmppath[64]; 488 489 pr = probe_path(path); 490 if (!pr) 491 return NULL; 492 493 if (path[5] == 'u' && path[6] == 'b' && path[7] == 'i' && 494 path[8] >= '' && path[8] <= '9' ) { 495 /* skip ubi device if not UBIFS (as it requires ubiblock) */ 496 if (strcmp("ubifs", pr->type)) 497 return NULL; 498 499 /* skip ubi device if ubiblock device is present */ 500 snprintf(tmppath, sizeof(tmppath), "/dev/ubiblock%s", path + 8); 501 list_for_each_entry(epr, &devices, list) 502 if (!strcmp(epr->dev, tmppath)) 503 return NULL; 504 } 505 506 return pr; 507 } 508 509 static int _cache_load(const char *path) 510 { 511 int gl_flags = GLOB_NOESCAPE | GLOB_MARK; 512 int j; 513 glob_t gl; 514 515 if (glob(path, gl_flags, NULL, &gl) < 0) 516 return -1; 517 518 for (j = 0; j < gl.gl_pathc; j++) { 519 struct probe_info *pr = _probe_path(gl.gl_pathv[j]); 520 if (pr) 521 list_add_tail(&pr->list, &devices); 522 } 523 524 globfree(&gl); 525 526 return 0; 527 } 528 529 static void cache_load(int mtd) 530 { 531 if (mtd) { 532 _cache_load("/dev/mtdblock*"); 533 _cache_load("/dev/ubiblock*"); 534 _cache_load("/dev/ubi[0-9]*"); 535 } 536 _cache_load("/dev/loop*"); 537 _cache_load("/dev/mmcblk*"); 538 _cache_load("/dev/sd*"); 539 _cache_load("/dev/hd*"); 540 _cache_load("/dev/md*"); 541 _cache_load("/dev/nvme*"); 542 _cache_load("/dev/vd*"); 543 _cache_load("/dev/xvd*"); 544 _cache_load("/dev/dm-*"); 545 } 546 547 548 static struct probe_info* find_block_info(char *uuid, char *label, char *path) 549 { 550 struct probe_info *pr = NULL; 551 552 if (uuid) 553 list_for_each_entry(pr, &devices, list) 554 if (pr->uuid && !strcasecmp(pr->uuid, uuid)) 555 return pr; 556 557 if (label) 558 list_for_each_entry(pr, &devices, list) 559 if (pr->label && !strcmp(pr->label, label)) 560 return pr; 561 562 if (path) 563 list_for_each_entry(pr, &devices, list) 564 if (pr->dev && !strcmp(basename(pr->dev), basename(path))) 565 return pr; 566 567 return NULL; 568 } 569 570 static char* find_mount_point(char *block) 571 { 572 FILE *fp = fopen("/proc/self/mountinfo", "r"); 573 static char line[256]; 574 char *point = NULL, *pos, *tmp, *cpoint, *devname; 575 struct stat s; 576 int rstat; 577 unsigned int minor, major; 578 579 if (!fp) 580 return NULL; 581 582 rstat = stat(block, &s); 583 584 while (fgets(line, sizeof(line), fp)) { 585 pos = strchr(line, ' '); 586 if (!pos) 587 continue; 588 589 pos = strchr(pos + 1, ' '); 590 if (!pos) 591 continue; 592 593 tmp = ++pos; 594 pos = strchr(pos, ':'); 595 if (!pos) 596 continue; 597 598 *pos = '\0'; 599 major = atoi(tmp); 600 tmp = ++pos; 601 pos = strchr(pos, ' '); 602 if (!pos) 603 continue; 604 605 *pos = '\0'; 606 minor = atoi(tmp); 607 pos = strchr(pos + 1, ' '); 608 if (!pos) 609 continue; 610 tmp = ++pos; 611 612 pos = strchr(pos, ' '); 613 if (!pos) 614 continue; 615 *pos = '\0'; 616 cpoint = tmp; 617 618 pos = strchr(pos + 1, ' '); 619 if (!pos) 620 continue; 621 622 pos = strchr(pos + 1, ' '); 623 if (!pos) 624 continue; 625 626 pos = strchr(pos + 1, ' '); 627 if (!pos) 628 continue; 629 630 tmp = ++pos; 631 pos = strchr(pos, ' '); 632 if (!pos) 633 continue; 634 635 *pos = '\0'; 636 devname = tmp; 637 if (!strcmp(block, devname)) { 638 point = strdup(cpoint); 639 break; 640 } 641 642 if (rstat) 643 continue; 644 645 if (!S_ISBLK(s.st_mode)) 646 continue; 647 648 if (major == major(s.st_rdev) && 649 minor == minor(s.st_rdev)) { 650 point = strdup(cpoint); 651 break; 652 } 653 } 654 655 fclose(fp); 656 657 return point; 658 } 659 660 static int print_block_uci(struct probe_info *pr) 661 { 662 if (!strcmp(pr->type, "swap")) { 663 printf("config 'swap'\n"); 664 } else { 665 char *mp = find_mount_point(pr->dev); 666 667 printf("config 'mount'\n"); 668 if (mp) { 669 printf("\toption\ttarget\t'%s'\n", mp); 670 free(mp); 671 } else { 672 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev)); 673 } 674 } 675 if (pr->uuid) 676 printf("\toption\tuuid\t'%s'\n", pr->uuid); 677 else 678 printf("\toption\tdevice\t'%s'\n", pr->dev); 679 printf("\toption\tenabled\t''\n\n"); 680 681 return 0; 682 } 683 684 static int print_block_info(struct probe_info *pr) 685 { 686 static char *mp; 687 688 mp = find_mount_point(pr->dev); 689 printf("%s:", pr->dev); 690 if (pr->uuid) 691 printf(" UUID=\"%s\"", pr->uuid); 692 693 if (pr->label) 694 printf(" LABEL=\"%s\"", pr->label); 695 696 if (pr->version) 697 printf(" VERSION=\"%s\"", pr->version); 698 699 if (mp) { 700 printf(" MOUNT=\"%s\"", mp); 701 free(mp); 702 } 703 704 printf(" TYPE=\"%s\"\n", pr->type); 705 706 return 0; 707 } 708 709 static void check_filesystem(struct probe_info *pr) 710 { 711 pid_t pid; 712 struct stat statbuf; 713 const char *e2fsck = "/usr/sbin/e2fsck"; 714 const char *f2fsck = "/usr/sbin/fsck.f2fs"; 715 const char *fatfsck = "/usr/sbin/fsck.fat"; 716 const char *btrfsck = "/usr/bin/btrfsck"; 717 const char *ntfsck = "/usr/bin/ntfsfix"; 718 const char *ckfs; 719 720 /* UBIFS does not need stuff like fsck */ 721 if (!strncmp(pr->type, "ubifs", 5)) 722 return; 723 724 if (!strncmp(pr->type, "vfat", 4)) { 725 ckfs = fatfsck; 726 } else if (!strncmp(pr->type, "f2fs", 4)) { 727 ckfs = f2fsck; 728 } else if (!strncmp(pr->type, "ext", 3)) { 729 ckfs = e2fsck; 730 } else if (!strncmp(pr->type, "btrfs", 5)) { 731 ckfs = btrfsck; 732 } else if (!strncmp(pr->type, "ntfs", 4)) { 733 ckfs = ntfsck; 734 } else { 735 ULOG_ERR("check_filesystem: %s is not supported\n", pr->type); 736 return; 737 } 738 739 if (stat(ckfs, &statbuf) < 0) { 740 ULOG_ERR("check_filesystem: %s not found\n", ckfs); 741 return; 742 } 743 744 pid = fork(); 745 if (!pid) { 746 if(!strncmp(pr->type, "f2fs", 4)) { 747 execl(ckfs, ckfs, "-f", pr->dev, NULL); 748 exit(EXIT_FAILURE); 749 } else if(!strncmp(pr->type, "btrfs", 5)) { 750 execl(ckfs, ckfs, "--repair", pr->dev, NULL); 751 exit(EXIT_FAILURE); 752 } else if(!strncmp(pr->type, "ntfs", 4)) { 753 execl(ckfs, ckfs, "-b", pr->dev, NULL); 754 exit(EXIT_FAILURE); 755 } else { 756 execl(ckfs, ckfs, "-p", pr->dev, NULL); 757 exit(EXIT_FAILURE); 758 } 759 } else if (pid > 0) { 760 int status; 761 762 waitpid(pid, &status, 0); 763 if (WIFEXITED(status) && WEXITSTATUS(status)) 764 ULOG_ERR("check_filesystem: %s returned %d\n", ckfs, WEXITSTATUS(status)); 765 if (WIFSIGNALED(status)) 766 ULOG_ERR("check_filesystem: %s terminated by %s\n", ckfs, strsignal(WTERMSIG(status))); 767 } 768 } 769 770 static void handle_swapfiles(bool on) 771 { 772 struct stat s; 773 struct mount *m; 774 struct probe_info *pr; 775 776 vlist_for_each_element(&mounts, m, node) 777 { 778 if (m->type != TYPE_SWAP || !m->target) 779 continue; 780 781 if (stat(m->target, &s) || !S_ISREG(s.st_mode)) 782 continue; 783 784 pr = _probe_path(m->target); 785 786 if (!pr) 787 continue; 788 789 if (!strcmp(pr->type, "swap")) { 790 if (on) 791 swapon(pr->dev, m->prio); 792 else 793 swapoff(pr->dev); 794 } 795 796 free(pr); 797 } 798 } 799 800 static void to_devnull(int fd) 801 { 802 int devnull = open("/dev/null", fd ? O_WRONLY : O_RDONLY); 803 804 if (devnull >= 0) 805 dup2(devnull, fd); 806 807 if (devnull > STDERR_FILENO) 808 close(devnull); 809 } 810 811 static int exec_mount(const char *source, const char *target, 812 const char *fstype, const char *options) 813 { 814 pid_t pid; 815 struct stat s; 816 FILE *mount_fd; 817 int err, status, pfds[2]; 818 char errmsg[128], cmd[sizeof("/sbin/mount.XXXXXXXXXXXXXXXX\0")]; 819 820 snprintf(cmd, sizeof(cmd), "/sbin/mount.%s", fstype); 821 822 if (stat(cmd, &s) < 0 || !S_ISREG(s.st_mode) || !(s.st_mode & S_IXUSR)) { 823 ULOG_ERR("No \"mount.%s\" utility available\n", fstype); 824 return -1; 825 } 826 827 if (pipe(pfds) < 0) 828 return -1; 829 830 fcntl(pfds[0], F_SETFD, fcntl(pfds[0], F_GETFD) | FD_CLOEXEC); 831 fcntl(pfds[1], F_SETFD, fcntl(pfds[1], F_GETFD) | FD_CLOEXEC); 832 833 pid = vfork(); 834 835 switch (pid) { 836 case -1: 837 close(pfds[0]); 838 close(pfds[1]); 839 840 return -1; 841 842 case 0: 843 to_devnull(STDIN_FILENO); 844 to_devnull(STDOUT_FILENO); 845 846 dup2(pfds[1], STDERR_FILENO); 847 close(pfds[0]); 848 close(pfds[1]); 849 850 if (options && *options) 851 execl(cmd, cmd, "-o", options, source, target, NULL); 852 else 853 execl(cmd, cmd, source, target, NULL); 854 855 return -1; 856 857 default: 858 close(pfds[1]); 859 860 mount_fd = fdopen(pfds[0], "r"); 861 862 while (fgets(errmsg, sizeof(errmsg), mount_fd)) 863 ULOG_ERR("mount.%s: %s", fstype, errmsg); 864 865 fclose(mount_fd); 866 867 err = waitpid(pid, &status, 0); 868 869 if (err != -1) { 870 if (status != 0) { 871 ULOG_ERR("mount.%s: failed with status %d\n", fstype, status); 872 errno = EINVAL; 873 err = -1; 874 } else { 875 errno = 0; 876 err = 0; 877 } 878 } 879 880 break; 881 } 882 883 return err; 884 } 885 886 static int handle_mount(const char *source, const char *target, 887 const char *fstype, struct mount *m) 888 { 889 int i, err; 890 size_t mount_opts_len; 891 char *mount_opts = NULL, *ptr; 892 893 err = mount(source, target, fstype, m ? m->flags : 0, 894 (m && m->options) ? m->options : ""); 895 896 /* Requested file system type is not available in kernel, 897 attempt to call mount helper. */ 898 if (err == -1 && errno == ENODEV) { 899 if (m) { 900 /* Convert mount flags back into string representation, 901 first calculate needed length of string buffer... */ 902 mount_opts_len = 1 + (m->options ? strlen(m->options) : 0); 903 904 for (i = 0; i < ARRAY_SIZE(mount_flags); i++) 905 if ((mount_flags[i].flag > 0) && 906 (mount_flags[i].flag < INT_MAX) && 907 (m->flags & (uint32_t)mount_flags[i].flag)) 908 mount_opts_len += strlen(mount_flags[i].name) + 1; 909 910 /* ... then now allocate and fill it ... */ 911 ptr = mount_opts = calloc(1, mount_opts_len); 912 913 if (!ptr) { 914 errno = ENOMEM; 915 return -1; 916 } 917 918 if (m->options) 919 ptr += sprintf(ptr, "%s,", m->options); 920 921 for (i = 0; i < ARRAY_SIZE(mount_flags); i++) 922 if ((mount_flags[i].flag > 0) && 923 (mount_flags[i].flag < INT_MAX) && 924 (m->flags & (uint32_t)mount_flags[i].flag)) 925 ptr += sprintf(ptr, "%s,", mount_flags[i].name); 926 927 mount_opts[mount_opts_len - 1] = 0; 928 } 929 930 /* ... and now finally invoke the external mount program */ 931 err = exec_mount(source, target, fstype, mount_opts); 932 } 933 934 free(mount_opts); 935 936 return err; 937 } 938 939 static int blockd_notify(const char *method, char *device, struct mount *m, 940 struct probe_info *pr) 941 { 942 struct ubus_context *ctx = ubus_connect(NULL); 943 uint32_t id; 944 int err; 945 946 if (!ctx) 947 return -ENXIO; 948 949 if (!ubus_lookup_id(ctx, "block", &id)) { 950 struct blob_buf buf = { 0 }; 951 char *d = strrchr(device, '/'); 952 953 if (d) 954 d++; 955 else 956 d = device; 957 958 blob_buf_init(&buf, 0); 959 960 if (m) { 961 962 blobmsg_add_string(&buf, "device", d); 963 if (m->uuid) 964 blobmsg_add_string(&buf, "uuid", m->uuid); 965 if (m->label) 966 blobmsg_add_string(&buf, "label", m->label); 967 if (m->target) 968 blobmsg_add_string(&buf, "target", m->target); 969 if (m->options) 970 blobmsg_add_string(&buf, "options", m->options); 971 if (m->autofs) 972 blobmsg_add_u32(&buf, "autofs", m->autofs); 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 } else if (pr) { 978 blobmsg_add_string(&buf, "device", d); 979 if (pr->uuid) 980 blobmsg_add_string(&buf, "uuid", pr->uuid); 981 if (pr->label) 982 blobmsg_add_string(&buf, "label", pr->label); 983 if (pr->type) 984 blobmsg_add_string(&buf, "type", pr->type); 985 if (pr->version) 986 blobmsg_add_string(&buf, "version", pr->version); 987 blobmsg_add_u32(&buf, "anon", 1); 988 } else { 989 blobmsg_add_string(&buf, "device", d); 990 blobmsg_add_u32(&buf, "remove", 1); 991 } 992 993 err = ubus_invoke(ctx, id, method, buf.head, NULL, NULL, 3000); 994 } else { 995 err = -ENOENT; 996 } 997 998 ubus_free(ctx); 999 1000 return err; 1001 } 1002 1003 static int mount_device(struct probe_info *pr, int type) 1004 { 1005 struct mount *m; 1006 struct stat st; 1007 char *_target = NULL; 1008 char *target; 1009 char *device; 1010 char *mp; 1011 int err; 1012 1013 if (!pr) 1014 return -1; 1015 1016 device = basename(pr->dev); 1017 1018 if (!strcmp(pr->type, "swap")) { 1019 if ((type == TYPE_HOTPLUG) && !auto_swap) 1020 return -1; 1021 m = find_swap(pr->uuid, pr->label, device); 1022 if (m || anon_swap) 1023 swapon(pr->dev, (m) ? (m->prio) : (0)); 1024 1025 return 0; 1026 } 1027 1028 m = find_block(pr->uuid, pr->label, device, NULL); 1029 if (m && m->extroot) 1030 return -1; 1031 1032 mp = find_mount_point(pr->dev); 1033 if (mp) { 1034 if (m && m->type == TYPE_MOUNT && m->target && strcmp(m->target, mp)) { 1035 ULOG_ERR("%s is already mounted on %s\n", pr->dev, mp); 1036 err = -1; 1037 } else 1038 err = 0; 1039 free(mp); 1040 return err; 1041 } 1042 1043 if (type == TYPE_HOTPLUG) 1044 blockd_notify("hotplug", device, m, pr); 1045 1046 /* Check if device should be mounted & set the target directory */ 1047 if (m) { 1048 switch (type) { 1049 case TYPE_HOTPLUG: 1050 if (m->autofs) 1051 return 0; 1052 if (!auto_mount) 1053 return -1; 1054 break; 1055 case TYPE_AUTOFS: 1056 if (!m->autofs) 1057 return -1; 1058 break; 1059 case TYPE_DEV: 1060 if (m->autofs) 1061 return -1; 1062 break; 1063 } 1064 1065 if (m->autofs) { 1066 if (asprintf(&_target, "/tmp/run/blockd/%s", device) == -1) 1067 exit(ENOMEM); 1068 1069 target = _target; 1070 } else if (m->target) { 1071 target = m->target; 1072 } else { 1073 if (asprintf(&_target, "/mnt/%s", device) == -1) 1074 exit(ENOMEM); 1075 1076 target = _target; 1077 } 1078 } else if (anon_mount) { 1079 if (asprintf(&_target, "/mnt/%s", device) == -1) 1080 exit(ENOMEM); 1081 1082 target = _target; 1083 } else { 1084 /* No reason to mount this device */ 1085 return 0; 1086 } 1087 1088 /* Mount the device */ 1089 1090 if (check_fs) 1091 check_filesystem(pr); 1092 1093 mkdir_p(target, 0755); 1094 if (!lstat(target, &st) && S_ISLNK(st.st_mode)) 1095 unlink(target); 1096 1097 err = handle_mount(pr->dev, target, pr->type, m); 1098 if (err) { 1099 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %m\n", 1100 pr->dev, pr->type, target, errno); 1101 1102 if (_target) 1103 free(_target); 1104 1105 return err; 1106 } 1107 1108 if (_target) 1109 free(_target); 1110 1111 handle_swapfiles(true); 1112 1113 if (type != TYPE_AUTOFS) 1114 blockd_notify("mount", device, NULL, NULL); 1115 1116 return 0; 1117 } 1118 1119 static int umount_device(char *path, int type, bool all) 1120 { 1121 char *mp, *devpath; 1122 int err; 1123 1124 if (strlen(path) > 5 && !strncmp("/dev/", path, 5)) { 1125 mp = find_mount_point(path); 1126 } else { 1127 devpath = malloc(strlen(path) + 6); 1128 strcpy(devpath, "/dev/"); 1129 strcat(devpath, path); 1130 mp = find_mount_point(devpath); 1131 free(devpath); 1132 } 1133 1134 if (!mp) 1135 return -1; 1136 if (!strcmp(mp, "/") && !all) { 1137 free(mp); 1138 return 0; 1139 } 1140 if (type != TYPE_AUTOFS) 1141 blockd_notify("umount", basename(path), NULL, NULL); 1142 1143 err = umount2(mp, MNT_DETACH); 1144 if (err) { 1145 ULOG_ERR("unmounting %s (%s) failed (%d) - %m\n", path, mp, 1146 errno); 1147 } else { 1148 ULOG_INFO("unmounted %s (%s)\n", path, mp); 1149 rmdir(mp); 1150 } 1151 1152 free(mp); 1153 return err; 1154 } 1155 1156 static int mount_action(char *action, char *device, int type) 1157 { 1158 char *path = NULL; 1159 struct probe_info *pr; 1160 1161 if (!action || !device) 1162 return -1; 1163 1164 if (!strcmp(action, "remove")) { 1165 if (type == TYPE_HOTPLUG) 1166 blockd_notify("hotplug", device, NULL, NULL); 1167 1168 umount_device(device, type, true); 1169 1170 return 0; 1171 } else if (strcmp(action, "add")) { 1172 ULOG_ERR("Unkown action %s\n", action); 1173 1174 return -1; 1175 } 1176 1177 if (config_load(NULL)) 1178 return -1; 1179 1180 cache_load(1); 1181 1182 list_for_each_entry(pr, &devices, list) 1183 if (!strcmp(basename(pr->dev), device)) 1184 path = pr->dev; 1185 1186 if (!path) 1187 return -1; 1188 1189 return mount_device(find_block_info(NULL, NULL, path), type); 1190 } 1191 1192 static int main_hotplug(int argc, char **argv) 1193 { 1194 return mount_action(getenv("ACTION"), getenv("DEVNAME"), TYPE_HOTPLUG); 1195 } 1196 1197 static int main_autofs(int argc, char **argv) 1198 { 1199 int err = 0; 1200 1201 if (argc < 3) 1202 return -1; 1203 1204 if (!strcmp(argv[2], "start")) { 1205 struct probe_info *pr; 1206 1207 if (config_load(NULL)) 1208 return -1; 1209 1210 cache_load(1); 1211 list_for_each_entry(pr, &devices, list) { 1212 struct mount *m; 1213 char *mp; 1214 1215 if (!strcmp(pr->type, "swap")) 1216 continue; 1217 1218 m = find_block(pr->uuid, pr->label, NULL, NULL); 1219 if (m && m->extroot) 1220 continue; 1221 1222 blockd_notify("hotplug", pr->dev, m, pr); 1223 if ((!m || !m->autofs) && (mp = find_mount_point(pr->dev))) { 1224 blockd_notify("mount", pr->dev, NULL, NULL); 1225 free(mp); 1226 } 1227 } 1228 } else { 1229 if (argc < 4) 1230 return -EINVAL; 1231 1232 err = mount_action(argv[2], argv[3], TYPE_AUTOFS); 1233 } 1234 1235 if (err) { 1236 ULOG_ERR("autofs: \"%s\" action has failed: %d\n", argv[2], err); 1237 } 1238 1239 return err; 1240 } 1241 1242 static int find_block_mtd(char *name, char *part, int plen) 1243 { 1244 FILE *fp = fopen("/proc/mtd", "r"); 1245 static char line[256]; 1246 char *index = NULL; 1247 1248 if(!fp) 1249 return -1; 1250 1251 while (!index && fgets(line, sizeof(line), fp)) { 1252 if (strstr(line, name)) { 1253 char *eol = strstr(line, ":"); 1254 1255 if (!eol) 1256 continue; 1257 1258 *eol = '\0'; 1259 index = &line[3]; 1260 } 1261 } 1262 1263 fclose(fp); 1264 1265 if (!index) 1266 return -1; 1267 1268 snprintf(part, plen, "/dev/mtdblock%s", index); 1269 1270 return 0; 1271 } 1272 1273 #ifdef UBIFS_EXTROOT 1274 static int find_ubi_vol(libubi_t libubi, char *name, int *dev_num, int *vol_id) 1275 { 1276 int dev = 0; 1277 1278 while (ubi_dev_present(libubi, dev)) 1279 { 1280 struct ubi_dev_info dev_info; 1281 struct ubi_vol_info vol_info; 1282 1283 if (ubi_get_dev_info1(libubi, dev++, &dev_info)) 1284 continue; 1285 if (ubi_get_vol_info1_nm(libubi, dev_info.dev_num, name, &vol_info)) 1286 continue; 1287 1288 *dev_num = dev_info.dev_num; 1289 *vol_id = vol_info.vol_id; 1290 1291 return 0; 1292 } 1293 1294 return -1; 1295 } 1296 1297 static int find_block_ubi(libubi_t libubi, char *name, char *part, int plen) 1298 { 1299 int dev_num; 1300 int vol_id; 1301 int err = -1; 1302 1303 err = find_ubi_vol(libubi, name, &dev_num, &vol_id); 1304 if (!err) 1305 snprintf(part, plen, "/dev/ubi%d_%d", dev_num, vol_id); 1306 1307 return err; 1308 } 1309 1310 static int find_block_ubi_RO(libubi_t libubi, char *name, char *part, int plen) 1311 { 1312 int dev_num; 1313 int vol_id; 1314 int err = -1; 1315 1316 err = find_ubi_vol(libubi, name, &dev_num, &vol_id); 1317 if (!err) 1318 snprintf(part, plen, "/dev/ubiblock%d_%d", dev_num, vol_id); 1319 1320 return err; 1321 } 1322 #endif 1323 1324 static int find_root_dev(char *buf, int len) 1325 { 1326 DIR *d; 1327 dev_t root; 1328 struct stat s; 1329 struct dirent *e; 1330 1331 if (stat("/", &s)) 1332 return -1; 1333 1334 if (!(d = opendir("/dev"))) 1335 return -1; 1336 1337 root = s.st_dev; 1338 1339 while ((e = readdir(d)) != NULL) { 1340 snprintf(buf, len, "/dev/%s", e->d_name); 1341 1342 if (stat(buf, &s) || s.st_rdev != root) 1343 continue; 1344 1345 closedir(d); 1346 return 0; 1347 } 1348 1349 closedir(d); 1350 return -1; 1351 } 1352 1353 static int test_fs_support(const char *name) 1354 { 1355 char line[128], *p; 1356 int rv = -1; 1357 FILE *f; 1358 1359 if ((f = fopen("/proc/filesystems", "r")) != NULL) { 1360 while (fgets(line, sizeof(line), f)) { 1361 p = strtok(line, "\t\n"); 1362 1363 if (p && !strcmp(p, "nodev")) 1364 p = strtok(NULL, "\t\n"); 1365 1366 if (p && !strcmp(p, name)) { 1367 rv = 0; 1368 break; 1369 } 1370 } 1371 fclose(f); 1372 } 1373 1374 return rv; 1375 } 1376 1377 /** 1378 * Check if mounted partition is a valid extroot 1379 * 1380 * @path target mount point 1381 * 1382 * Valid extroot partition has to contain /etc/.extroot-uuid with UUID of root 1383 * device. This function reads UUID and verifies it OR writes UUID to 1384 * .extroot-uuid if it doesn't exist yet (first extroot usage). 1385 */ 1386 static int check_extroot(char *path) 1387 { 1388 struct probe_info *pr = NULL; 1389 struct probe_info *tmp; 1390 struct stat s; 1391 char uuid[64] = { 0 }; 1392 char devpath[32]; 1393 char tag[64]; 1394 FILE *fp; 1395 int err; 1396 1397 err = find_block_mtd("\"rootfs\"", devpath, sizeof(devpath)); 1398 #ifdef UBIFS_EXTROOT 1399 if (err) { 1400 libubi_t libubi; 1401 1402 libubi = libubi_open(); 1403 err = find_block_ubi_RO(libubi, "rootfs", devpath, sizeof(devpath)); 1404 libubi_close(libubi); 1405 } 1406 #endif 1407 if (err) { 1408 err = find_root_dev(devpath, sizeof(devpath)); 1409 } 1410 if (err) { 1411 ULOG_ERR("extroot: unable to determine root device\n"); 1412 return -1; 1413 } 1414 1415 /* Find root device probe_info so we know its UUID */ 1416 list_for_each_entry(tmp, &devices, list) { 1417 if (!strcmp(tmp->dev, devpath)) { 1418 pr = tmp; 1419 break; 1420 } 1421 } 1422 if (!pr) { 1423 ULOG_ERR("extroot: unable to lookup root device %s\n", devpath); 1424 return -1; 1425 } 1426 1427 snprintf(tag, sizeof(tag), "%s/etc", path); 1428 if (stat(tag, &s)) 1429 mkdir_p(tag, 0755); 1430 1431 snprintf(tag, sizeof(tag), "%s/etc/.extroot-uuid", path); 1432 if (stat(tag, &s)) { 1433 fp = fopen(tag, "w+"); 1434 if (!fp) { 1435 ULOG_ERR("extroot: failed to write UUID to %s: %d (%m)\n", 1436 tag, errno); 1437 /* return 0 to continue boot regardless of error */ 1438 return 0; 1439 } 1440 fputs(pr->uuid, fp); 1441 fclose(fp); 1442 return 0; 1443 } 1444 1445 fp = fopen(tag, "r"); 1446 if (!fp) { 1447 ULOG_ERR("extroot: failed to read UUID from %s: %d (%m)\n", tag, 1448 errno); 1449 return -1; 1450 } 1451 1452 if (!fgets(uuid, sizeof(uuid), fp)) 1453 ULOG_ERR("extroot: failed to read UUID from %s: %d (%m)\n", tag, 1454 errno); 1455 fclose(fp); 1456 1457 if (*uuid && !strcasecmp(uuid, pr->uuid)) 1458 return 0; 1459 1460 ULOG_ERR("extroot: UUID mismatch (root: %s, %s: %s)\n", pr->uuid, 1461 basename(path), uuid); 1462 return -1; 1463 } 1464 1465 /* 1466 * Read info about extroot from UCI (using prefix) and mount it. 1467 */ 1468 static int mount_extroot(char *cfg) 1469 { 1470 char overlay[] = "/tmp/extroot/overlay"; 1471 char mnt[] = "/tmp/extroot/mnt"; 1472 char *path = mnt; 1473 struct probe_info *pr; 1474 struct mount *m; 1475 int err = -1; 1476 1477 /* Load @cfg/etc/config/fstab */ 1478 if (config_load(cfg)) 1479 return -2; 1480 1481 /* See if there is extroot-specific mount config */ 1482 m = find_block(NULL, NULL, NULL, "/"); 1483 if (!m) 1484 m = find_block(NULL, NULL, NULL, "/overlay"); 1485 1486 if (!m || !m->extroot) 1487 { 1488 ULOG_INFO("extroot: not configured\n"); 1489 return -1; 1490 } 1491 1492 /* Find block device pointed by the mount config */ 1493 pr = find_block_info(m->uuid, m->label, m->device); 1494 1495 if (!pr && delay_root){ 1496 ULOG_INFO("extroot: device not present, retrying in %u seconds\n", delay_root); 1497 sleep(delay_root); 1498 make_devs(); 1499 cache_load(1); 1500 pr = find_block_info(m->uuid, m->label, m->device); 1501 } 1502 if (pr) { 1503 if (strncmp(pr->type, "ext", 3) && 1504 strncmp(pr->type, "f2fs", 4) && 1505 strncmp(pr->type, "btrfs", 5) && 1506 strncmp(pr->type, "ntfs", 4) && 1507 strncmp(pr->type, "ubifs", 5)) { 1508 ULOG_ERR("extroot: unsupported filesystem %s, try ext4, f2fs, btrfs, ntfs or ubifs\n", pr->type); 1509 return -1; 1510 } 1511 1512 if (test_fs_support(pr->type)) { 1513 ULOG_ERR("extroot: filesystem %s not supported by kernel\n", pr->type); 1514 return -1; 1515 } 1516 1517 if (m->overlay) 1518 path = overlay; 1519 mkdir_p(path, 0755); 1520 1521 if (check_fs) 1522 check_filesystem(pr); 1523 1524 err = mount(pr->dev, path, pr->type, m->flags, 1525 (m->options) ? (m->options) : ("")); 1526 1527 if (err) { 1528 ULOG_ERR("extroot: mounting %s (%s) on %s failed: %d (%m)\n", 1529 pr->dev, pr->type, path, errno); 1530 } else if (m->overlay) { 1531 err = check_extroot(path); 1532 if (err) 1533 umount(path); 1534 } 1535 } else { 1536 ULOG_ERR("extroot: cannot find device %s%s\n", 1537 (m->uuid ? "with UUID " : (m->label ? "with label " : "")), 1538 (m->uuid ? m->uuid : (m->label ? m->label : m->device))); 1539 } 1540 1541 return err; 1542 } 1543 1544 /** 1545 * Look for extroot config and mount it if present 1546 * 1547 * Look for /etc/config/fstab on all supported partitions and use it for 1548 * mounting extroot if specified. 1549 */ 1550 static int main_extroot(int argc, char **argv) 1551 { 1552 struct probe_info *pr; 1553 char blkdev_path[32] = { 0 }; 1554 int err = -1; 1555 #ifdef UBIFS_EXTROOT 1556 libubi_t libubi; 1557 #endif 1558 1559 if (!getenv("PREINIT")) 1560 return -1; 1561 1562 if (argc != 2) { 1563 ULOG_ERR("Usage: block extroot\n"); 1564 return -1; 1565 } 1566 1567 make_devs(); 1568 cache_load(1); 1569 1570 /* enable LOG_INFO messages */ 1571 ulog_threshold(LOG_INFO); 1572 1573 /* 1574 * Look for "rootfs_data". We will want to mount it and check for 1575 * extroot configuration. 1576 */ 1577 1578 /* Start with looking for MTD partition */ 1579 find_block_mtd("\"rootfs_data\"", blkdev_path, sizeof(blkdev_path)); 1580 if (blkdev_path[0]) { 1581 pr = find_block_info(NULL, NULL, blkdev_path); 1582 if (pr && !strcmp(pr->type, "jffs2")) { 1583 char cfg[] = "/tmp/jffs_cfg"; 1584 1585 /* 1586 * Mount MTD part and try extroot (using 1587 * /etc/config/fstab from that partition) 1588 */ 1589 mkdir_p(cfg, 0755); 1590 if (!mount(blkdev_path, cfg, "jffs2", MS_NOATIME, NULL)) { 1591 err = mount_extroot(cfg); 1592 umount2(cfg, MNT_DETACH); 1593 } 1594 if (err < 0) 1595 rmdir("/tmp/overlay"); 1596 rmdir(cfg); 1597 return err; 1598 } 1599 } 1600 1601 #ifdef UBIFS_EXTROOT 1602 /* ... but it also could be an UBI volume */ 1603 memset(blkdev_path, 0, sizeof(blkdev_path)); 1604 libubi = libubi_open(); 1605 find_block_ubi(libubi, "rootfs_data", blkdev_path, sizeof(blkdev_path)); 1606 libubi_close(libubi); 1607 if (blkdev_path[0]) { 1608 char cfg[] = "/tmp/ubifs_cfg"; 1609 1610 /* Mount volume and try extroot (using fstab from that vol) */ 1611 mkdir_p(cfg, 0755); 1612 if (!mount(blkdev_path, cfg, "ubifs", MS_NOATIME, NULL)) { 1613 err = mount_extroot(cfg); 1614 umount2(cfg, MNT_DETACH); 1615 } 1616 if (err < 0) 1617 rmdir("/tmp/overlay"); 1618 rmdir(cfg); 1619 return err; 1620 } 1621 #endif 1622 1623 /* As a last resort look for /etc/config/fstab on "rootfs" partition */ 1624 return mount_extroot(NULL); 1625 } 1626 1627 static int main_mount(int argc, char **argv) 1628 { 1629 struct probe_info *pr; 1630 1631 if (config_load(NULL)) 1632 return -1; 1633 1634 cache_load(1); 1635 list_for_each_entry(pr, &devices, list) 1636 mount_device(pr, TYPE_DEV); 1637 1638 handle_swapfiles(true); 1639 1640 return 0; 1641 } 1642 1643 static int main_umount(int argc, char **argv) 1644 { 1645 struct probe_info *pr; 1646 bool all = false; 1647 1648 if (config_load(NULL)) 1649 return -1; 1650 1651 handle_swapfiles(false); 1652 1653 cache_load(1); 1654 1655 if (argc == 3) 1656 all = !strcmp(argv[2], "-a"); 1657 1658 list_for_each_entry(pr, &devices, list) { 1659 struct mount *m; 1660 1661 if (!strcmp(pr->type, "swap")) 1662 continue; 1663 1664 m = find_block(pr->uuid, pr->label, basename(pr->dev), NULL); 1665 if (m && m->extroot) 1666 continue; 1667 1668 umount_device(pr->dev, TYPE_DEV, all); 1669 } 1670 1671 return 0; 1672 } 1673 1674 static int main_detect(int argc, char **argv) 1675 { 1676 struct probe_info *pr; 1677 1678 cache_load(0); 1679 printf("config 'global'\n"); 1680 printf("\toption\tanon_swap\t''\n"); 1681 printf("\toption\tanon_mount\t''\n"); 1682 printf("\toption\tauto_swap\t'1'\n"); 1683 printf("\toption\tauto_mount\t'1'\n"); 1684 printf("\toption\tdelay_root\t'5'\n"); 1685 printf("\toption\tcheck_fs\t''\n\n"); 1686 list_for_each_entry(pr, &devices, list) 1687 print_block_uci(pr); 1688 1689 return 0; 1690 } 1691 1692 static int main_info(int argc, char **argv) 1693 { 1694 int i; 1695 struct probe_info *pr; 1696 1697 cache_load(1); 1698 if (argc == 2) { 1699 list_for_each_entry(pr, &devices, list) 1700 print_block_info(pr); 1701 1702 return 0; 1703 }; 1704 1705 for (i = 2; i < argc; i++) { 1706 struct stat s; 1707 1708 if (stat(argv[i], &s)) { 1709 ULOG_ERR("failed to stat %s\n", argv[i]); 1710 continue; 1711 } 1712 if (!S_ISBLK(s.st_mode) && !(S_ISCHR(s.st_mode) && major(s.st_rdev) == 250)) { 1713 ULOG_ERR("%s is not a block device\n", argv[i]); 1714 continue; 1715 } 1716 pr = find_block_info(NULL, NULL, argv[i]); 1717 if (pr) 1718 print_block_info(pr); 1719 } 1720 1721 return 0; 1722 } 1723 1724 static int swapon_usage(void) 1725 { 1726 fprintf(stderr, "Usage: swapon [-s] [-a] [[-p pri] DEVICE]\n\n" 1727 "\tStart swapping on [DEVICE]\n" 1728 " -a\tStart swapping on all swap devices\n" 1729 " -p pri\tSet priority of swap device\n" 1730 " -s\tShow summary\n"); 1731 return -1; 1732 } 1733 1734 static int main_swapon(int argc, char **argv) 1735 { 1736 int ch; 1737 FILE *fp; 1738 char *lineptr; 1739 size_t s; 1740 struct probe_info *pr; 1741 int flags = 0; 1742 int pri; 1743 struct stat st; 1744 int err; 1745 1746 while ((ch = getopt(argc, argv, "ap:s")) != -1) { 1747 switch(ch) { 1748 case 's': 1749 fp = fopen("/proc/swaps", "r"); 1750 lineptr = NULL; 1751 1752 if (!fp) { 1753 ULOG_ERR("failed to open /proc/swaps\n"); 1754 return -1; 1755 } 1756 while (getline(&lineptr, &s, fp) > 0) 1757 printf("%s", lineptr); 1758 if (lineptr) 1759 free(lineptr); 1760 fclose(fp); 1761 return 0; 1762 case 'a': 1763 cache_load(0); 1764 list_for_each_entry(pr, &devices, list) { 1765 if (strcmp(pr->type, "swap")) 1766 continue; 1767 if (swapon(pr->dev, 0)) 1768 ULOG_ERR("failed to swapon %s\n", pr->dev); 1769 } 1770 return 0; 1771 case 'p': 1772 pri = atoi(optarg); 1773 if (pri >= 0) 1774 flags = ((pri << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER; 1775 break; 1776 default: 1777 return swapon_usage(); 1778 } 1779 } 1780 1781 if (optind != (argc - 1)) 1782 return swapon_usage(); 1783 1784 if (stat(argv[optind], &st) || (!S_ISBLK(st.st_mode) && !S_ISREG(st.st_mode))) { 1785 ULOG_ERR("%s is not a block device or file\n", argv[optind]); 1786 return -1; 1787 } 1788 err = swapon(argv[optind], flags); 1789 if (err) { 1790 ULOG_ERR("failed to swapon %s (%d)\n", argv[optind], err); 1791 return err; 1792 } 1793 1794 return 0; 1795 } 1796 1797 static int main_swapoff(int argc, char **argv) 1798 { 1799 if (argc != 2) { 1800 ULOG_ERR("Usage: swapoff [-a] [DEVICE]\n\n" 1801 "\tStop swapping on DEVICE\n" 1802 " -a\tStop swapping on all swap devices\n"); 1803 return -1; 1804 } 1805 1806 if (!strcmp(argv[1], "-a")) { 1807 FILE *fp = fopen("/proc/swaps", "r"); 1808 char line[256]; 1809 1810 if (!fp) { 1811 ULOG_ERR("failed to open /proc/swaps\n"); 1812 return -1; 1813 } 1814 if (fgets(line, sizeof(line), fp)) 1815 while (fgets(line, sizeof(line), fp)) { 1816 char *end = strchr(line, ' '); 1817 int err; 1818 1819 if (!end) 1820 continue; 1821 *end = '\0'; 1822 err = swapoff(line); 1823 if (err) 1824 ULOG_ERR("failed to swapoff %s (%d)\n", line, err); 1825 } 1826 fclose(fp); 1827 } else { 1828 struct stat s; 1829 int err; 1830 1831 if (stat(argv[1], &s) || (!S_ISBLK(s.st_mode) && !S_ISREG(s.st_mode))) { 1832 ULOG_ERR("%s is not a block device or file\n", argv[1]); 1833 return -1; 1834 } 1835 err = swapoff(argv[1]); 1836 if (err) { 1837 ULOG_ERR("failed to swapoff %s (%d)\n", argv[1], err); 1838 return err; 1839 } 1840 } 1841 1842 return 0; 1843 } 1844 1845 int main(int argc, char **argv) 1846 { 1847 char *base = basename(*argv); 1848 1849 umask(0); 1850 1851 ulog_open(-1, -1, "block"); 1852 ulog_threshold(LOG_NOTICE); 1853 1854 if (!strcmp(base, "swapon")) 1855 return main_swapon(argc, argv); 1856 1857 if (!strcmp(base, "swapoff")) 1858 return main_swapoff(argc, argv); 1859 1860 if ((argc > 1) && !strcmp(base, "block")) { 1861 if (!strcmp(argv[1], "info")) 1862 return main_info(argc, argv); 1863 1864 if (!strcmp(argv[1], "detect")) 1865 return main_detect(argc, argv); 1866 1867 if (!strcmp(argv[1], "hotplug")) 1868 return main_hotplug(argc, argv); 1869 1870 if (!strcmp(argv[1], "autofs")) 1871 return main_autofs(argc, argv); 1872 1873 if (!strcmp(argv[1], "extroot")) 1874 return main_extroot(argc, argv); 1875 1876 if (!strcmp(argv[1], "mount")) 1877 return main_mount(argc, argv); 1878 1879 if (!strcmp(argv[1], "umount")) 1880 return main_umount(argc, argv); 1881 1882 if (!strcmp(argv[1], "remount")) { 1883 int ret = main_umount(argc, argv); 1884 1885 if (!ret) 1886 ret = main_mount(argc, argv); 1887 return ret; 1888 } 1889 } 1890 1891 ULOG_ERR("Usage: block <info|mount|umount|detect>\n"); 1892 1893 return -1; 1894 } 1895
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