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/ulog.h> 42 #include <libubox/list.h> 43 #include <libubox/vlist.h> 44 #include <libubox/blobmsg_json.h> 45 #include <libubox/avl-cmp.h> 46 #include <libubus.h> 47 48 #include "probe.h" 49 50 #define AUTOFS_MOUNT_PATH "/tmp/run/blockd/" 51 52 #ifdef UBIFS_EXTROOT 53 #include "libubi/libubi.h" 54 #endif 55 56 enum { 57 TYPE_MOUNT, 58 TYPE_SWAP, 59 }; 60 61 enum { 62 TYPE_DEV, 63 TYPE_HOTPLUG, 64 TYPE_AUTOFS, 65 }; 66 67 struct mount { 68 struct vlist_node node; 69 int type; 70 71 char *target; 72 char *path; 73 char *options; 74 uint32_t flags; 75 char *uuid; 76 char *label; 77 char *device; 78 int extroot; 79 int autofs; 80 int overlay; 81 int disabled_fsck; 82 unsigned int prio; 83 }; 84 85 static struct vlist_tree mounts; 86 static struct blob_buf b; 87 static LIST_HEAD(devices); 88 static int anon_mount, anon_swap, auto_mount, auto_swap, check_fs; 89 static unsigned int delay_root; 90 91 enum { 92 CFG_ANON_MOUNT, 93 CFG_ANON_SWAP, 94 CFG_AUTO_MOUNT, 95 CFG_AUTO_SWAP, 96 CFG_DELAY_ROOT, 97 CFG_CHECK_FS, 98 __CFG_MAX 99 }; 100 101 static const struct blobmsg_policy config_policy[__CFG_MAX] = { 102 [CFG_ANON_SWAP] = { .name = "anon_swap", .type = BLOBMSG_TYPE_INT32 }, 103 [CFG_ANON_MOUNT] = { .name = "anon_mount", .type = BLOBMSG_TYPE_INT32 }, 104 [CFG_AUTO_SWAP] = { .name = "auto_swap", .type = BLOBMSG_TYPE_INT32 }, 105 [CFG_AUTO_MOUNT] = { .name = "auto_mount", .type = BLOBMSG_TYPE_INT32 }, 106 [CFG_DELAY_ROOT] = { .name = "delay_root", .type = BLOBMSG_TYPE_INT32 }, 107 [CFG_CHECK_FS] = { .name = "check_fs", .type = BLOBMSG_TYPE_INT32 }, 108 }; 109 110 enum { 111 MOUNT_UUID, 112 MOUNT_LABEL, 113 MOUNT_ENABLE, 114 MOUNT_TARGET, 115 MOUNT_DEVICE, 116 MOUNT_OPTIONS, 117 MOUNT_AUTOFS, 118 __MOUNT_MAX 119 }; 120 121 static const struct uci_blob_param_list config_attr_list = { 122 .n_params = __CFG_MAX, 123 .params = config_policy, 124 }; 125 126 static const struct blobmsg_policy mount_policy[__MOUNT_MAX] = { 127 [MOUNT_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING }, 128 [MOUNT_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING }, 129 [MOUNT_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING }, 130 [MOUNT_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING }, 131 [MOUNT_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_STRING }, 132 [MOUNT_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 }, 133 [MOUNT_AUTOFS] = { .name = "autofs", .type = BLOBMSG_TYPE_INT32 }, 134 }; 135 136 static const struct uci_blob_param_list mount_attr_list = { 137 .n_params = __MOUNT_MAX, 138 .params = mount_policy, 139 }; 140 141 enum { 142 SWAP_ENABLE, 143 SWAP_UUID, 144 SWAP_LABEL, 145 SWAP_DEVICE, 146 SWAP_PRIO, 147 __SWAP_MAX 148 }; 149 150 static const struct blobmsg_policy swap_policy[__SWAP_MAX] = { 151 [SWAP_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 }, 152 [SWAP_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING }, 153 [SWAP_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING }, 154 [SWAP_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING }, 155 [SWAP_PRIO] = { .name = "priority", .type = BLOBMSG_TYPE_INT32 }, 156 }; 157 158 static const struct uci_blob_param_list swap_attr_list = { 159 .n_params = __SWAP_MAX, 160 .params = swap_policy, 161 }; 162 163 struct mount_flag { 164 const char *name; 165 int32_t flag; 166 }; 167 168 static const struct mount_flag mount_flags[] = { 169 { "sync", MS_SYNCHRONOUS }, 170 { "async", ~MS_SYNCHRONOUS }, 171 { "dirsync", MS_DIRSYNC }, 172 { "mand", MS_MANDLOCK }, 173 { "nomand", ~MS_MANDLOCK }, 174 { "atime", ~MS_NOATIME }, 175 { "noatime", MS_NOATIME }, 176 { "dev", ~MS_NODEV }, 177 { "nodev", MS_NODEV }, 178 { "diratime", ~MS_NODIRATIME }, 179 { "nodiratime", MS_NODIRATIME }, 180 { "exec", ~MS_NOEXEC }, 181 { "noexec", MS_NOEXEC }, 182 { "suid", ~MS_NOSUID }, 183 { "nosuid", MS_NOSUID }, 184 { "rw", ~MS_RDONLY }, 185 { "ro", MS_RDONLY }, 186 { "relatime", MS_RELATIME }, 187 { "norelatime", ~MS_RELATIME }, 188 { "strictatime", MS_STRICTATIME }, 189 { "acl", MS_POSIXACL }, 190 { "noacl", ~MS_POSIXACL }, 191 { "nouser_xattr", MS_NOUSER }, 192 { "user_xattr", ~MS_NOUSER }, 193 }; 194 195 static char *blobmsg_get_strdup(struct blob_attr *attr) 196 { 197 if (!attr) 198 return NULL; 199 200 return strdup(blobmsg_get_string(attr)); 201 } 202 203 static char *blobmsg_get_basename(struct blob_attr *attr) 204 { 205 if (!attr) 206 return NULL; 207 208 return strdup(basename(blobmsg_get_string(attr))); 209 } 210 211 static void parse_mount_options(struct mount *m, char *optstr) 212 { 213 int i; 214 bool is_flag; 215 char *p, *opts, *last; 216 217 m->flags = 0; 218 m->options = NULL; 219 220 if (!optstr || !*optstr) 221 return; 222 223 m->options = opts = calloc(1, strlen(optstr) + 1); 224 225 if (!m->options) 226 return; 227 228 p = last = optstr; 229 230 do { 231 p = strchr(p, ','); 232 233 if (p) 234 *p++ = 0; 235 236 for (i = 0, is_flag = false; i < ARRAY_SIZE(mount_flags); i++) { 237 if (!strcmp(last, mount_flags[i].name)) { 238 if (mount_flags[i].flag < 0) 239 m->flags &= (uint32_t)mount_flags[i].flag; 240 else 241 m->flags |= (uint32_t)mount_flags[i].flag; 242 is_flag = true; 243 break; 244 } 245 } 246 247 if (!is_flag) 248 opts += sprintf(opts, "%s%s", (opts > m->options) ? "," : "", last); 249 250 last = p; 251 252 } while (p); 253 254 free(optstr); 255 } 256 257 static int mount_add(struct uci_section *s) 258 { 259 struct blob_attr *tb[__MOUNT_MAX] = { 0 }; 260 struct mount *m; 261 262 blob_buf_init(&b, 0); 263 uci_to_blob(&b, s, &mount_attr_list); 264 blobmsg_parse(mount_policy, __MOUNT_MAX, tb, blob_data(b.head), blob_len(b.head)); 265 266 if (!tb[MOUNT_LABEL] && !tb[MOUNT_UUID] && !tb[MOUNT_DEVICE]) 267 return -1; 268 269 if (tb[MOUNT_ENABLE] && !blobmsg_get_u32(tb[MOUNT_ENABLE])) 270 return -1; 271 272 m = malloc(sizeof(struct mount)); 273 m->type = TYPE_MOUNT; 274 m->uuid = blobmsg_get_strdup(tb[MOUNT_UUID]); 275 m->label = blobmsg_get_strdup(tb[MOUNT_LABEL]); 276 m->target = blobmsg_get_strdup(tb[MOUNT_TARGET]); 277 m->device = blobmsg_get_basename(tb[MOUNT_DEVICE]); 278 if (tb[MOUNT_AUTOFS]) 279 m->autofs = blobmsg_get_u32(tb[MOUNT_AUTOFS]); 280 else 281 m->autofs = 0; 282 parse_mount_options(m, blobmsg_get_strdup(tb[MOUNT_OPTIONS])); 283 284 m->overlay = m->extroot = 0; 285 if (m->target && !strcmp(m->target, "/")) 286 m->extroot = 1; 287 if (m->target && !strcmp(m->target, "/overlay")) 288 m->extroot = m->overlay = 1; 289 290 if (m->target && *m->target != '/') { 291 ULOG_WARN("ignoring mount section %s due to invalid target '%s'\n", 292 s->e.name, m->target); 293 free(m); 294 return -1; 295 } 296 297 if (m->uuid) 298 vlist_add(&mounts, &m->node, m->uuid); 299 else if (m->label) 300 vlist_add(&mounts, &m->node, m->label); 301 else if (m->device) 302 vlist_add(&mounts, &m->node, m->device); 303 304 return 0; 305 } 306 307 static int swap_add(struct uci_section *s) 308 { 309 struct blob_attr *tb[__SWAP_MAX] = { 0 }; 310 struct mount *m; 311 312 blob_buf_init(&b, 0); 313 uci_to_blob(&b, s, &swap_attr_list); 314 blobmsg_parse(swap_policy, __SWAP_MAX, tb, blob_data(b.head), blob_len(b.head)); 315 316 if (!tb[SWAP_UUID] && !tb[SWAP_LABEL] && !tb[SWAP_DEVICE]) 317 return -1; 318 319 m = malloc(sizeof(struct mount)); 320 memset(m, 0, sizeof(struct mount)); 321 m->type = TYPE_SWAP; 322 m->uuid = blobmsg_get_strdup(tb[SWAP_UUID]); 323 m->label = blobmsg_get_strdup(tb[SWAP_LABEL]); 324 m->device = blobmsg_get_basename(tb[SWAP_DEVICE]); 325 if (tb[SWAP_PRIO]) 326 m->prio = blobmsg_get_u32(tb[SWAP_PRIO]); 327 if (m->prio) 328 m->prio = ((m->prio << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER; 329 330 if ((!tb[SWAP_ENABLE]) || blobmsg_get_u32(tb[SWAP_ENABLE])) { 331 /* store complete swap path */ 332 if (tb[SWAP_DEVICE]) 333 m->target = blobmsg_get_strdup(tb[SWAP_DEVICE]); 334 335 if (m->uuid) 336 vlist_add(&mounts, &m->node, m->uuid); 337 else if (m->label) 338 vlist_add(&mounts, &m->node, m->label); 339 else if (m->device) 340 vlist_add(&mounts, &m->node, m->device); 341 } 342 343 return 0; 344 } 345 346 static int global_add(struct uci_section *s) 347 { 348 struct blob_attr *tb[__CFG_MAX] = { 0 }; 349 350 blob_buf_init(&b, 0); 351 uci_to_blob(&b, s, &config_attr_list); 352 blobmsg_parse(config_policy, __CFG_MAX, tb, blob_data(b.head), blob_len(b.head)); 353 354 if ((tb[CFG_ANON_MOUNT]) && blobmsg_get_u32(tb[CFG_ANON_MOUNT])) 355 anon_mount = 1; 356 if ((tb[CFG_ANON_SWAP]) && blobmsg_get_u32(tb[CFG_ANON_SWAP])) 357 anon_swap = 1; 358 359 if ((tb[CFG_AUTO_MOUNT]) && blobmsg_get_u32(tb[CFG_AUTO_MOUNT])) 360 auto_mount = 1; 361 if ((tb[CFG_AUTO_SWAP]) && blobmsg_get_u32(tb[CFG_AUTO_SWAP])) 362 auto_swap = 1; 363 364 if (tb[CFG_DELAY_ROOT]) 365 delay_root = blobmsg_get_u32(tb[CFG_DELAY_ROOT]); 366 367 if ((tb[CFG_CHECK_FS]) && blobmsg_get_u32(tb[CFG_CHECK_FS])) 368 check_fs = 1; 369 370 return 0; 371 } 372 373 static struct mount* find_swap(const char *uuid, const char *label, const char *device) 374 { 375 struct mount *m; 376 377 vlist_for_each_element(&mounts, m, node) { 378 if (m->type != TYPE_SWAP) 379 continue; 380 if (uuid && m->uuid && !strcasecmp(m->uuid, uuid)) 381 return m; 382 if (label && m->label && !strcmp(m->label, label)) 383 return m; 384 if (device && m->device && !strcmp(m->device, device)) 385 return m; 386 } 387 388 return NULL; 389 } 390 391 static struct mount* find_block(const char *uuid, const char *label, const char *device, 392 const char *target) 393 { 394 struct mount *m; 395 396 vlist_for_each_element(&mounts, m, node) { 397 if (m->type != TYPE_MOUNT) 398 continue; 399 if (m->uuid && uuid && !strcasecmp(m->uuid, uuid)) 400 return m; 401 if (m->label && label && !strcmp(m->label, label)) 402 return m; 403 if (m->target && target && !strcmp(m->target, target)) 404 return m; 405 if (m->device && device && !strcmp(m->device, device)) 406 return m; 407 } 408 409 return NULL; 410 } 411 412 static void mounts_update(struct vlist_tree *tree, struct vlist_node *node_new, 413 struct vlist_node *node_old) 414 { 415 } 416 417 static struct uci_package * config_try_load(struct uci_context *ctx, char *path) 418 { 419 char *file = basename(path); 420 char *dir = dirname(path); 421 char *err; 422 struct uci_package *pkg; 423 424 uci_set_confdir(ctx, dir); 425 ULOG_INFO("attempting to load %s/%s\n", dir, file); 426 427 if (uci_load(ctx, file, &pkg)) { 428 uci_get_errorstr(ctx, &err, file); 429 ULOG_ERR("unable to load configuration (%s)\n", err); 430 431 free(err); 432 return NULL; 433 } 434 435 return pkg; 436 } 437 438 static int config_load(char *cfg) 439 { 440 struct uci_context *ctx = uci_alloc_context(); 441 struct uci_package *pkg = NULL; 442 struct uci_element *e; 443 char path[64]; 444 445 vlist_init(&mounts, avl_strcmp, mounts_update); 446 447 if (cfg) { 448 snprintf(path, sizeof(path), "%s/upper/etc/config/fstab", cfg); 449 pkg = config_try_load(ctx, path); 450 451 if (!pkg) { 452 snprintf(path, sizeof(path), "%s/etc/config/fstab", cfg); 453 pkg = config_try_load(ctx, path); 454 } 455 } 456 457 if (!pkg) { 458 snprintf(path, sizeof(path), "/etc/config/fstab"); 459 pkg = config_try_load(ctx, path); 460 } 461 462 if (!pkg) { 463 ULOG_ERR("no usable configuration\n"); 464 return -1; 465 } 466 467 vlist_update(&mounts); 468 uci_foreach_element(&pkg->sections, e) { 469 struct uci_section *s = uci_to_section(e); 470 471 if (!strcmp(s->type, "mount")) 472 mount_add(s); 473 if (!strcmp(s->type, "swap")) 474 swap_add(s); 475 if (!strcmp(s->type, "global")) 476 global_add(s); 477 } 478 vlist_flush(&mounts); 479 480 return 0; 481 } 482 483 static struct probe_info* _probe_path(char *path) 484 { 485 struct probe_info *pr; 486 char tmppath[64]; 487 488 /* skip ubi device if ubiblock device is present */ 489 if (path[5] == 'u' && path[6] == 'b' && path[7] == 'i' && 490 path[8] >= '' && path[8] <= '9' ) { 491 snprintf(tmppath, sizeof(tmppath), "/dev/ubiblock%s", path + 8); 492 list_for_each_entry(pr, &devices, list) 493 if (!strcasecmp(pr->dev, tmppath)) 494 return NULL; 495 } 496 497 return probe_path(path); 498 } 499 500 static int _cache_load(const char *path) 501 { 502 int gl_flags = GLOB_NOESCAPE | GLOB_MARK; 503 int j; 504 glob_t gl; 505 506 if (glob(path, gl_flags, NULL, &gl) < 0) 507 return -1; 508 509 for (j = 0; j < gl.gl_pathc; j++) { 510 struct probe_info *pr = _probe_path(gl.gl_pathv[j]); 511 if (pr) 512 list_add_tail(&pr->list, &devices); 513 } 514 515 globfree(&gl); 516 517 return 0; 518 } 519 520 static void cache_load(int mtd) 521 { 522 if (mtd) { 523 _cache_load("/dev/mtdblock*"); 524 _cache_load("/dev/ubiblock*"); 525 _cache_load("/dev/ubi[0-9]*"); 526 } 527 _cache_load("/dev/loop*"); 528 _cache_load("/dev/mmcblk*"); 529 _cache_load("/dev/sd*"); 530 _cache_load("/dev/hd*"); 531 _cache_load("/dev/md*"); 532 _cache_load("/dev/nvme*"); 533 _cache_load("/dev/vd*"); 534 _cache_load("/dev/xvd*"); 535 _cache_load("/dev/mapper/*"); 536 } 537 538 539 static struct probe_info* find_block_info(char *uuid, char *label, char *path) 540 { 541 struct probe_info *pr = NULL; 542 543 if (uuid) 544 list_for_each_entry(pr, &devices, list) 545 if (pr->uuid && !strcasecmp(pr->uuid, uuid)) 546 return pr; 547 548 if (label) 549 list_for_each_entry(pr, &devices, list) 550 if (pr->label && !strcmp(pr->label, label)) 551 return pr; 552 553 if (path) 554 list_for_each_entry(pr, &devices, list) 555 if (pr->dev && !strcmp(basename(pr->dev), basename(path))) 556 return pr; 557 558 return NULL; 559 } 560 561 static char* find_mount_point(char *block) 562 { 563 FILE *fp = fopen("/proc/self/mountinfo", "r"); 564 static char line[256]; 565 char *point = NULL, *pos, *tmp, *cpoint, *devname; 566 struct stat s; 567 int rstat; 568 unsigned int minor, major; 569 570 if (!fp) 571 return NULL; 572 573 rstat = stat(block, &s); 574 575 while (fgets(line, sizeof(line), fp)) { 576 pos = strchr(line, ' '); 577 if (!pos) 578 continue; 579 580 pos = strchr(pos + 1, ' '); 581 if (!pos) 582 continue; 583 584 tmp = ++pos; 585 pos = strchr(pos, ':'); 586 if (!pos) 587 continue; 588 589 *pos = '\0'; 590 major = atoi(tmp); 591 tmp = ++pos; 592 pos = strchr(pos, ' '); 593 if (!pos) 594 continue; 595 596 *pos = '\0'; 597 minor = atoi(tmp); 598 pos = strchr(pos + 1, ' '); 599 if (!pos) 600 continue; 601 tmp = ++pos; 602 603 pos = strchr(pos, ' '); 604 if (!pos) 605 continue; 606 *pos = '\0'; 607 cpoint = tmp; 608 609 pos = strchr(pos + 1, ' '); 610 if (!pos) 611 continue; 612 613 pos = strchr(pos + 1, ' '); 614 if (!pos) 615 continue; 616 617 pos = strchr(pos + 1, ' '); 618 if (!pos) 619 continue; 620 621 tmp = ++pos; 622 pos = strchr(pos, ' '); 623 if (!pos) 624 continue; 625 626 *pos = '\0'; 627 devname = tmp; 628 if (!strcmp(block, devname)) { 629 point = strdup(cpoint); 630 break; 631 } 632 633 if (rstat) 634 continue; 635 636 if (!S_ISBLK(s.st_mode)) 637 continue; 638 639 if (major == major(s.st_rdev) && 640 minor == minor(s.st_rdev)) { 641 point = strdup(cpoint); 642 break; 643 } 644 } 645 646 fclose(fp); 647 648 return point; 649 } 650 651 static int print_block_uci(struct probe_info *pr) 652 { 653 if (!strcmp(pr->type, "swap")) { 654 printf("config 'swap'\n"); 655 } else { 656 char *mp = find_mount_point(pr->dev); 657 658 printf("config 'mount'\n"); 659 if (mp) { 660 printf("\toption\ttarget\t'%s'\n", mp); 661 free(mp); 662 } else { 663 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev)); 664 } 665 } 666 if (pr->uuid) 667 printf("\toption\tuuid\t'%s'\n", pr->uuid); 668 else 669 printf("\toption\tdevice\t'%s'\n", pr->dev); 670 printf("\toption\tenabled\t''\n\n"); 671 672 return 0; 673 } 674 675 static int print_block_info(struct probe_info *pr) 676 { 677 static char *mp; 678 679 mp = find_mount_point(pr->dev); 680 printf("%s:", pr->dev); 681 if (pr->uuid) 682 printf(" UUID=\"%s\"", pr->uuid); 683 684 if (pr->label) 685 printf(" LABEL=\"%s\"", pr->label); 686 687 if (pr->version) 688 printf(" VERSION=\"%s\"", pr->version); 689 690 if (mp) { 691 printf(" MOUNT=\"%s\"", mp); 692 free(mp); 693 } 694 695 printf(" TYPE=\"%s\"\n", pr->type); 696 697 return 0; 698 } 699 700 static void mkdir_p(char *dir) 701 { 702 char *l = strrchr(dir, '/'); 703 704 if (l) { 705 *l = '\0'; 706 mkdir_p(dir); 707 *l = '/'; 708 mkdir(dir, 0755); 709 } 710 } 711 712 static void check_filesystem(struct probe_info *pr) 713 { 714 pid_t pid; 715 struct stat statbuf; 716 const char *e2fsck = "/usr/sbin/e2fsck"; 717 const char *f2fsck = "/usr/sbin/fsck.f2fs"; 718 const char *fatfsck = "/usr/sbin/fsck.fat"; 719 const char *btrfsck = "/usr/bin/btrfsck"; 720 const char *ntfsck = "/usr/bin/ntfsfix"; 721 const char *ckfs; 722 723 /* UBIFS does not need stuff like fsck */ 724 if (!strncmp(pr->type, "ubifs", 5)) 725 return; 726 727 if (!strncmp(pr->type, "vfat", 4)) { 728 ckfs = fatfsck; 729 } else if (!strncmp(pr->type, "f2fs", 4)) { 730 ckfs = f2fsck; 731 } else if (!strncmp(pr->type, "ext", 3)) { 732 ckfs = e2fsck; 733 } else if (!strncmp(pr->type, "btrfs", 5)) { 734 ckfs = btrfsck; 735 } else if (!strncmp(pr->type, "ntfs", 4)) { 736 ckfs = ntfsck; 737 } else { 738 ULOG_ERR("check_filesystem: %s is not supported\n", pr->type); 739 return; 740 } 741 742 if (stat(ckfs, &statbuf) < 0) { 743 ULOG_ERR("check_filesystem: %s not found\n", ckfs); 744 return; 745 } 746 747 pid = fork(); 748 if (!pid) { 749 if(!strncmp(pr->type, "f2fs", 4)) { 750 execl(ckfs, ckfs, "-f", pr->dev, NULL); 751 exit(EXIT_FAILURE); 752 } else if(!strncmp(pr->type, "btrfs", 5)) { 753 execl(ckfs, ckfs, "--repair", pr->dev, NULL); 754 exit(EXIT_FAILURE); 755 } else if(!strncmp(pr->type, "ntfs", 4)) { 756 execl(ckfs, ckfs, "-b", pr->dev, NULL); 757 exit(EXIT_FAILURE); 758 } else { 759 execl(ckfs, ckfs, "-p", pr->dev, NULL); 760 exit(EXIT_FAILURE); 761 } 762 } else if (pid > 0) { 763 int status; 764 765 waitpid(pid, &status, 0); 766 if (WIFEXITED(status) && WEXITSTATUS(status)) 767 ULOG_ERR("check_filesystem: %s returned %d\n", ckfs, WEXITSTATUS(status)); 768 if (WIFSIGNALED(status)) 769 ULOG_ERR("check_filesystem: %s terminated by %s\n", ckfs, strsignal(WTERMSIG(status))); 770 } 771 } 772 773 static void handle_swapfiles(bool on) 774 { 775 struct stat s; 776 struct mount *m; 777 struct probe_info *pr; 778 779 vlist_for_each_element(&mounts, m, node) 780 { 781 if (m->type != TYPE_SWAP || !m->target) 782 continue; 783 784 if (stat(m->target, &s) || !S_ISREG(s.st_mode)) 785 continue; 786 787 pr = _probe_path(m->target); 788 789 if (!pr) 790 continue; 791 792 if (!strcmp(pr->type, "swap")) { 793 if (on) 794 swapon(pr->dev, m->prio); 795 else 796 swapoff(pr->dev); 797 } 798 799 free(pr); 800 } 801 } 802 803 static void to_devnull(int fd) 804 { 805 int devnull = open("/dev/null", fd ? O_WRONLY : O_RDONLY); 806 807 if (devnull >= 0) 808 dup2(devnull, fd); 809 810 if (devnull > STDERR_FILENO) 811 close(devnull); 812 } 813 814 static int exec_mount(const char *source, const char *target, 815 const char *fstype, const char *options) 816 { 817 pid_t pid; 818 struct stat s; 819 FILE *mount_fd; 820 int err, status, pfds[2]; 821 char errmsg[128], cmd[sizeof("/sbin/mount.XXXXXXXXXXXXXXXX\0")]; 822 823 snprintf(cmd, sizeof(cmd), "/sbin/mount.%s", fstype); 824 825 if (stat(cmd, &s) < 0 || !S_ISREG(s.st_mode) || !(s.st_mode & S_IXUSR)) { 826 ULOG_ERR("No \"mount.%s\" utility available\n", fstype); 827 return -1; 828 } 829 830 if (pipe(pfds) < 0) 831 return -1; 832 833 fcntl(pfds[0], F_SETFD, fcntl(pfds[0], F_GETFD) | FD_CLOEXEC); 834 fcntl(pfds[1], F_SETFD, fcntl(pfds[1], F_GETFD) | FD_CLOEXEC); 835 836 pid = vfork(); 837 838 switch (pid) { 839 case -1: 840 close(pfds[0]); 841 close(pfds[1]); 842 843 return -1; 844 845 case 0: 846 to_devnull(STDIN_FILENO); 847 to_devnull(STDOUT_FILENO); 848 849 dup2(pfds[1], STDERR_FILENO); 850 close(pfds[0]); 851 close(pfds[1]); 852 853 if (options && *options) 854 execl(cmd, cmd, "-o", options, source, target, NULL); 855 else 856 execl(cmd, cmd, source, target, NULL); 857 858 return -1; 859 860 default: 861 close(pfds[1]); 862 863 mount_fd = fdopen(pfds[0], "r"); 864 865 while (fgets(errmsg, sizeof(errmsg), mount_fd)) 866 ULOG_ERR("mount.%s: %s", fstype, errmsg); 867 868 fclose(mount_fd); 869 870 err = waitpid(pid, &status, 0); 871 872 if (err != -1) { 873 if (status != 0) { 874 ULOG_ERR("mount.%s: failed with status %d\n", fstype, status); 875 errno = EINVAL; 876 err = -1; 877 } else { 878 errno = 0; 879 err = 0; 880 } 881 } 882 883 break; 884 } 885 886 return err; 887 } 888 889 static int handle_mount(const char *source, const char *target, 890 const char *fstype, struct mount *m) 891 { 892 int i, err; 893 size_t mount_opts_len; 894 char *mount_opts = NULL, *ptr; 895 896 err = mount(source, target, fstype, m ? m->flags : 0, 897 (m && m->options) ? m->options : ""); 898 899 /* Requested file system type is not available in kernel, 900 attempt to call mount helper. */ 901 if (err == -1 && errno == ENODEV) { 902 if (m) { 903 /* Convert mount flags back into string representation, 904 first calculate needed length of string buffer... */ 905 mount_opts_len = 1 + (m->options ? strlen(m->options) : 0); 906 907 for (i = 0; i < ARRAY_SIZE(mount_flags); i++) 908 if ((mount_flags[i].flag > 0) && 909 (mount_flags[i].flag < INT_MAX) && 910 (m->flags & (uint32_t)mount_flags[i].flag)) 911 mount_opts_len += strlen(mount_flags[i].name) + 1; 912 913 /* ... then now allocate and fill it ... */ 914 ptr = mount_opts = calloc(1, mount_opts_len); 915 916 if (!ptr) { 917 errno = ENOMEM; 918 return -1; 919 } 920 921 if (m->options) 922 ptr += sprintf(ptr, "%s,", m->options); 923 924 for (i = 0; i < ARRAY_SIZE(mount_flags); i++) 925 if ((mount_flags[i].flag > 0) && 926 (mount_flags[i].flag < INT_MAX) && 927 (m->flags & (uint32_t)mount_flags[i].flag)) 928 ptr += sprintf(ptr, "%s,", mount_flags[i].name); 929 930 mount_opts[mount_opts_len - 1] = 0; 931 } 932 933 /* ... and now finally invoke the external mount program */ 934 err = exec_mount(source, target, fstype, mount_opts); 935 } 936 937 return err; 938 } 939 940 static int blockd_notify(const char *method, char *device, struct mount *m, 941 struct probe_info *pr) 942 { 943 struct ubus_context *ctx = ubus_connect(NULL); 944 uint32_t id; 945 int err; 946 947 if (!ctx) 948 return -ENXIO; 949 950 if (!ubus_lookup_id(ctx, "block", &id)) { 951 struct blob_buf buf = { 0 }; 952 char *d = strrchr(device, '/'); 953 954 if (d) 955 d++; 956 else 957 d = device; 958 959 blob_buf_init(&buf, 0); 960 961 if (m) { 962 963 blobmsg_add_string(&buf, "device", d); 964 if (m->uuid) 965 blobmsg_add_string(&buf, "uuid", m->uuid); 966 if (m->label) 967 blobmsg_add_string(&buf, "label", m->label); 968 if (m->target) 969 blobmsg_add_string(&buf, "target", m->target); 970 if (m->options) 971 blobmsg_add_string(&buf, "options", m->options); 972 if (m->autofs) 973 blobmsg_add_u32(&buf, "autofs", m->autofs); 974 if (pr->type) 975 blobmsg_add_string(&buf, "type", pr->type); 976 if (pr->version) 977 blobmsg_add_string(&buf, "version", pr->version); 978 } else if (pr) { 979 blobmsg_add_string(&buf, "device", d); 980 if (pr->uuid) 981 blobmsg_add_string(&buf, "uuid", pr->uuid); 982 if (pr->label) 983 blobmsg_add_string(&buf, "label", pr->label); 984 if (pr->type) 985 blobmsg_add_string(&buf, "type", pr->type); 986 if (pr->version) 987 blobmsg_add_string(&buf, "version", pr->version); 988 blobmsg_add_u32(&buf, "anon", 1); 989 } else { 990 blobmsg_add_string(&buf, "device", d); 991 blobmsg_add_u32(&buf, "remove", 1); 992 } 993 994 err = ubus_invoke(ctx, id, method, buf.head, NULL, NULL, 3000); 995 } else { 996 err = -ENOENT; 997 } 998 999 ubus_free(ctx); 1000 1001 return err; 1002 } 1003 1004 static int mount_device(struct probe_info *pr, int type) 1005 { 1006 struct mount *m; 1007 struct stat st; 1008 char _target[32]; 1009 char *target; 1010 char *device; 1011 char *mp; 1012 int err; 1013 1014 if (!pr) 1015 return -1; 1016 1017 device = basename(pr->dev); 1018 1019 if (!strcmp(pr->type, "swap")) { 1020 if ((type == TYPE_HOTPLUG) && !auto_swap) 1021 return -1; 1022 m = find_swap(pr->uuid, pr->label, device); 1023 if (m || anon_swap) 1024 swapon(pr->dev, (m) ? (m->prio) : (0)); 1025 1026 return 0; 1027 } 1028 1029 m = find_block(pr->uuid, pr->label, device, NULL); 1030 if (m && m->extroot) 1031 return -1; 1032 1033 mp = find_mount_point(pr->dev); 1034 if (mp) { 1035 if (m && m->type == TYPE_MOUNT && strcmp(m->target, mp)) { 1036 ULOG_ERR("%s is already mounted on %s\n", pr->dev, mp); 1037 err = -1; 1038 } else 1039 err = 0; 1040 free(mp); 1041 return err; 1042 } 1043 1044 if (type == TYPE_HOTPLUG) 1045 blockd_notify("hotplug", device, m, pr); 1046 1047 /* Check if device should be mounted & set the target directory */ 1048 if (m) { 1049 switch (type) { 1050 case TYPE_HOTPLUG: 1051 if (m->autofs) 1052 return 0; 1053 if (!auto_mount) 1054 return -1; 1055 break; 1056 case TYPE_AUTOFS: 1057 if (!m->autofs) 1058 return -1; 1059 break; 1060 case TYPE_DEV: 1061 if (m->autofs) 1062 return -1; 1063 break; 1064 } 1065 1066 if (m->autofs) { 1067 snprintf(_target, sizeof(_target), "/tmp/run/blockd/%s", device); 1068 target = _target; 1069 } else if (m->target) { 1070 target = m->target; 1071 } else { 1072 snprintf(_target, sizeof(_target), "/mnt/%s", device); 1073 target = _target; 1074 } 1075 } else if (anon_mount) { 1076 snprintf(_target, sizeof(_target), "/mnt/%s", device); 1077 target = _target; 1078 } else { 1079 /* No reason to mount this device */ 1080 return 0; 1081 } 1082 1083 /* Mount the device */ 1084 1085 if (check_fs) 1086 check_filesystem(pr); 1087 1088 mkdir_p(target); 1089 if (!lstat(target, &st) && S_ISLNK(st.st_mode)) 1090 unlink(target); 1091 1092 err = handle_mount(pr->dev, target, pr->type, m); 1093 if (err) { 1094 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %m\n", 1095 pr->dev, pr->type, target, errno); 1096 return err; 1097 } 1098 1099 handle_swapfiles(true); 1100 1101 if (type != TYPE_AUTOFS) 1102 blockd_notify("mount", device, NULL, NULL); 1103 1104 return 0; 1105 } 1106 1107 static int umount_device(char *path, int type, bool all) 1108 { 1109 char *mp; 1110 int err; 1111 1112 mp = find_mount_point(path); 1113 if (!mp) 1114 return -1; 1115 if (!strcmp(mp, "/") && !all) 1116 return 0; 1117 1118 if (type != TYPE_AUTOFS) 1119 blockd_notify("umount", basename(path), NULL, NULL); 1120 1121 err = umount2(mp, MNT_DETACH); 1122 if (err) { 1123 ULOG_ERR("unmounting %s (%s) failed (%d) - %m\n", path, mp, 1124 errno); 1125 } else { 1126 ULOG_INFO("unmounted %s (%s)\n", path, mp); 1127 rmdir(mp); 1128 } 1129 1130 free(mp); 1131 return err; 1132 } 1133 1134 static int mount_action(char *action, char *device, int type) 1135 { 1136 char path[32]; 1137 1138 if (!action || !device) 1139 return -1; 1140 snprintf(path, sizeof(path), "/dev/%s", device); 1141 1142 if (!strcmp(action, "remove")) { 1143 if (type == TYPE_HOTPLUG) 1144 blockd_notify("hotplug", device, NULL, NULL); 1145 1146 umount_device(path, type, true); 1147 1148 return 0; 1149 } else if (strcmp(action, "add")) { 1150 ULOG_ERR("Unkown action %s\n", action); 1151 1152 return -1; 1153 } 1154 1155 if (config_load(NULL)) 1156 return -1; 1157 cache_load(0); 1158 1159 return mount_device(find_block_info(NULL, NULL, path), type); 1160 } 1161 1162 static int main_hotplug(int argc, char **argv) 1163 { 1164 return mount_action(getenv("ACTION"), getenv("DEVNAME"), TYPE_HOTPLUG); 1165 } 1166 1167 static int main_autofs(int argc, char **argv) 1168 { 1169 int err = 0; 1170 1171 if (argc < 3) 1172 return -1; 1173 1174 if (!strcmp(argv[2], "start")) { 1175 struct probe_info *pr; 1176 1177 if (config_load(NULL)) 1178 return -1; 1179 1180 cache_load(0); 1181 list_for_each_entry(pr, &devices, list) { 1182 struct mount *m; 1183 char *mp; 1184 1185 if (!strcmp(pr->type, "swap")) 1186 continue; 1187 1188 m = find_block(pr->uuid, pr->label, NULL, NULL); 1189 if (m && m->extroot) 1190 continue; 1191 1192 blockd_notify("hotplug", pr->dev, m, pr); 1193 if ((!m || !m->autofs) && (mp = find_mount_point(pr->dev))) { 1194 blockd_notify("mount", pr->dev, NULL, NULL); 1195 free(mp); 1196 } 1197 } 1198 } else { 1199 if (argc < 4) 1200 return -EINVAL; 1201 1202 err = mount_action(argv[2], argv[3], TYPE_AUTOFS); 1203 } 1204 1205 if (err) { 1206 ULOG_ERR("autofs: \"%s\" action has failed: %d\n", argv[2], err); 1207 } 1208 1209 return err; 1210 } 1211 1212 static int find_block_mtd(char *name, char *part, int plen) 1213 { 1214 FILE *fp = fopen("/proc/mtd", "r"); 1215 static char line[256]; 1216 char *index = NULL; 1217 1218 if(!fp) 1219 return -1; 1220 1221 while (!index && fgets(line, sizeof(line), fp)) { 1222 if (strstr(line, name)) { 1223 char *eol = strstr(line, ":"); 1224 1225 if (!eol) 1226 continue; 1227 1228 *eol = '\0'; 1229 index = &line[3]; 1230 } 1231 } 1232 1233 fclose(fp); 1234 1235 if (!index) 1236 return -1; 1237 1238 snprintf(part, plen, "/dev/mtdblock%s", index); 1239 1240 return 0; 1241 } 1242 1243 #ifdef UBIFS_EXTROOT 1244 static int find_ubi_vol(libubi_t libubi, char *name, int *dev_num, int *vol_id) 1245 { 1246 int dev = 0; 1247 1248 while (ubi_dev_present(libubi, dev)) 1249 { 1250 struct ubi_dev_info dev_info; 1251 struct ubi_vol_info vol_info; 1252 1253 if (ubi_get_dev_info1(libubi, dev++, &dev_info)) 1254 continue; 1255 if (ubi_get_vol_info1_nm(libubi, dev_info.dev_num, name, &vol_info)) 1256 continue; 1257 1258 *dev_num = dev_info.dev_num; 1259 *vol_id = vol_info.vol_id; 1260 1261 return 0; 1262 } 1263 1264 return -1; 1265 } 1266 1267 static int find_block_ubi(libubi_t libubi, char *name, char *part, int plen) 1268 { 1269 int dev_num; 1270 int vol_id; 1271 int err = -1; 1272 1273 err = find_ubi_vol(libubi, name, &dev_num, &vol_id); 1274 if (!err) 1275 snprintf(part, plen, "/dev/ubi%d_%d", dev_num, vol_id); 1276 1277 return err; 1278 } 1279 1280 static int find_block_ubi_RO(libubi_t libubi, char *name, char *part, int plen) 1281 { 1282 int dev_num; 1283 int vol_id; 1284 int err = -1; 1285 1286 err = find_ubi_vol(libubi, name, &dev_num, &vol_id); 1287 if (!err) 1288 snprintf(part, plen, "/dev/ubiblock%d_%d", dev_num, vol_id); 1289 1290 return err; 1291 } 1292 #endif 1293 1294 static int find_root_dev(char *buf, int len) 1295 { 1296 DIR *d; 1297 dev_t root; 1298 struct stat s; 1299 struct dirent *e; 1300 1301 if (stat("/", &s)) 1302 return -1; 1303 1304 if (!(d = opendir("/dev"))) 1305 return -1; 1306 1307 root = s.st_dev; 1308 1309 while ((e = readdir(d)) != NULL) { 1310 snprintf(buf, len, "/dev/%s", e->d_name); 1311 1312 if (stat(buf, &s) || s.st_rdev != root) 1313 continue; 1314 1315 closedir(d); 1316 return 0; 1317 } 1318 1319 closedir(d); 1320 return -1; 1321 } 1322 1323 static int test_fs_support(const char *name) 1324 { 1325 char line[128], *p; 1326 int rv = -1; 1327 FILE *f; 1328 1329 if ((f = fopen("/proc/filesystems", "r")) != NULL) { 1330 while (fgets(line, sizeof(line), f)) { 1331 p = strtok(line, "\t\n"); 1332 1333 if (p && !strcmp(p, "nodev")) 1334 p = strtok(NULL, "\t\n"); 1335 1336 if (p && !strcmp(p, name)) { 1337 rv = 0; 1338 break; 1339 } 1340 } 1341 fclose(f); 1342 } 1343 1344 return rv; 1345 } 1346 1347 /** 1348 * Check if mounted partition is a valid extroot 1349 * 1350 * @path target mount point 1351 * 1352 * Valid extroot partition has to contain /etc/.extroot-uuid with UUID of root 1353 * device. This function reads UUID and verifies it OR writes UUID to 1354 * .extroot-uuid if it doesn't exist yet (first extroot usage). 1355 */ 1356 static int check_extroot(char *path) 1357 { 1358 struct probe_info *pr = NULL; 1359 struct probe_info *tmp; 1360 struct stat s; 1361 char uuid[64] = { 0 }; 1362 char devpath[32]; 1363 char tag[64]; 1364 FILE *fp; 1365 int err; 1366 1367 err = find_block_mtd("\"rootfs\"", devpath, sizeof(devpath)); 1368 #ifdef UBIFS_EXTROOT 1369 if (err) { 1370 libubi_t libubi; 1371 1372 libubi = libubi_open(); 1373 err = find_block_ubi_RO(libubi, "rootfs", devpath, sizeof(devpath)); 1374 libubi_close(libubi); 1375 } 1376 #endif 1377 if (err) { 1378 err = find_root_dev(devpath, sizeof(devpath)); 1379 } 1380 if (err) { 1381 ULOG_ERR("extroot: unable to determine root device\n"); 1382 return -1; 1383 } 1384 1385 /* Find root device probe_info so we know its UUID */ 1386 list_for_each_entry(tmp, &devices, list) { 1387 if (!strcmp(tmp->dev, devpath)) { 1388 pr = tmp; 1389 break; 1390 } 1391 } 1392 if (!pr) { 1393 ULOG_ERR("extroot: unable to lookup root device %s\n", devpath); 1394 return -1; 1395 } 1396 1397 snprintf(tag, sizeof(tag), "%s/etc", path); 1398 if (stat(tag, &s)) 1399 mkdir_p(tag); 1400 1401 snprintf(tag, sizeof(tag), "%s/etc/.extroot-uuid", path); 1402 if (stat(tag, &s)) { 1403 fp = fopen(tag, "w+"); 1404 if (!fp) { 1405 ULOG_ERR("extroot: failed to write UUID to %s: %d (%m)\n", 1406 tag, errno); 1407 /* return 0 to continue boot regardless of error */ 1408 return 0; 1409 } 1410 fputs(pr->uuid, fp); 1411 fclose(fp); 1412 return 0; 1413 } 1414 1415 fp = fopen(tag, "r"); 1416 if (!fp) { 1417 ULOG_ERR("extroot: failed to read UUID from %s: %d (%m)\n", tag, 1418 errno); 1419 return -1; 1420 } 1421 1422 if (!fgets(uuid, sizeof(uuid), fp)) 1423 ULOG_ERR("extroot: failed to read UUID from %s: %d (%m)\n", tag, 1424 errno); 1425 fclose(fp); 1426 1427 if (*uuid && !strcasecmp(uuid, pr->uuid)) 1428 return 0; 1429 1430 ULOG_ERR("extroot: UUID mismatch (root: %s, %s: %s)\n", pr->uuid, 1431 basename(path), uuid); 1432 return -1; 1433 } 1434 1435 /* 1436 * Read info about extroot from UCI (using prefix) and mount it. 1437 */ 1438 static int mount_extroot(char *cfg) 1439 { 1440 char overlay[] = "/tmp/extroot/overlay"; 1441 char mnt[] = "/tmp/extroot/mnt"; 1442 char *path = mnt; 1443 struct probe_info *pr; 1444 struct mount *m; 1445 int err = -1; 1446 1447 /* Load @cfg/etc/config/fstab */ 1448 if (config_load(cfg)) 1449 return -2; 1450 1451 /* See if there is extroot-specific mount config */ 1452 m = find_block(NULL, NULL, NULL, "/"); 1453 if (!m) 1454 m = find_block(NULL, NULL, NULL, "/overlay"); 1455 1456 if (!m || !m->extroot) 1457 { 1458 ULOG_INFO("extroot: not configured\n"); 1459 return -1; 1460 } 1461 1462 /* Find block device pointed by the mount config */ 1463 pr = find_block_info(m->uuid, m->label, m->device); 1464 1465 if (!pr && delay_root){ 1466 ULOG_INFO("extroot: device not present, retrying in %u seconds\n", delay_root); 1467 sleep(delay_root); 1468 make_devs(); 1469 cache_load(1); 1470 pr = find_block_info(m->uuid, m->label, m->device); 1471 } 1472 if (pr) { 1473 if (strncmp(pr->type, "ext", 3) && 1474 strncmp(pr->type, "f2fs", 4) && 1475 strncmp(pr->type, "btrfs", 5) && 1476 strncmp(pr->type, "ntfs", 4) && 1477 strncmp(pr->type, "ubifs", 5)) { 1478 ULOG_ERR("extroot: unsupported filesystem %s, try ext4, f2fs, btrfs, ntfs or ubifs\n", pr->type); 1479 return -1; 1480 } 1481 1482 if (test_fs_support(pr->type)) { 1483 ULOG_ERR("extroot: filesystem %s not supported by kernel\n", pr->type); 1484 return -1; 1485 } 1486 1487 if (m->overlay) 1488 path = overlay; 1489 mkdir_p(path); 1490 1491 if (check_fs) 1492 check_filesystem(pr); 1493 1494 err = mount(pr->dev, path, pr->type, m->flags, 1495 (m->options) ? (m->options) : ("")); 1496 1497 if (err) { 1498 ULOG_ERR("extroot: mounting %s (%s) on %s failed: %d (%m)\n", 1499 pr->dev, pr->type, path, errno); 1500 } else if (m->overlay) { 1501 err = check_extroot(path); 1502 if (err) 1503 umount(path); 1504 } 1505 } else { 1506 ULOG_ERR("extroot: cannot find device %s%s\n", 1507 (m->uuid ? "with UUID " : (m->label ? "with label " : "")), 1508 (m->uuid ? m->uuid : (m->label ? m->label : m->device))); 1509 } 1510 1511 return err; 1512 } 1513 1514 /** 1515 * Look for extroot config and mount it if present 1516 * 1517 * Look for /etc/config/fstab on all supported partitions and use it for 1518 * mounting extroot if specified. 1519 */ 1520 static int main_extroot(int argc, char **argv) 1521 { 1522 struct probe_info *pr; 1523 char blkdev_path[32] = { 0 }; 1524 int err = -1; 1525 #ifdef UBIFS_EXTROOT 1526 libubi_t libubi; 1527 #endif 1528 1529 if (!getenv("PREINIT")) 1530 return -1; 1531 1532 if (argc != 2) { 1533 ULOG_ERR("Usage: block extroot\n"); 1534 return -1; 1535 } 1536 1537 make_devs(); 1538 cache_load(1); 1539 1540 /* enable LOG_INFO messages */ 1541 ulog_threshold(LOG_INFO); 1542 1543 /* 1544 * Look for "rootfs_data". We will want to mount it and check for 1545 * extroot configuration. 1546 */ 1547 1548 /* Start with looking for MTD partition */ 1549 find_block_mtd("\"rootfs_data\"", blkdev_path, sizeof(blkdev_path)); 1550 if (blkdev_path[0]) { 1551 pr = find_block_info(NULL, NULL, blkdev_path); 1552 if (pr && !strcmp(pr->type, "jffs2")) { 1553 char cfg[] = "/tmp/jffs_cfg"; 1554 1555 /* 1556 * Mount MTD part and try extroot (using 1557 * /etc/config/fstab from that partition) 1558 */ 1559 mkdir_p(cfg); 1560 if (!mount(blkdev_path, cfg, "jffs2", MS_NOATIME, NULL)) { 1561 err = mount_extroot(cfg); 1562 umount2(cfg, MNT_DETACH); 1563 } 1564 if (err < 0) 1565 rmdir("/tmp/overlay"); 1566 rmdir(cfg); 1567 return err; 1568 } 1569 } 1570 1571 #ifdef UBIFS_EXTROOT 1572 /* ... but it also could be an UBI volume */ 1573 memset(blkdev_path, 0, sizeof(blkdev_path)); 1574 libubi = libubi_open(); 1575 find_block_ubi(libubi, "rootfs_data", blkdev_path, sizeof(blkdev_path)); 1576 libubi_close(libubi); 1577 if (blkdev_path[0]) { 1578 char cfg[] = "/tmp/ubifs_cfg"; 1579 1580 /* Mount volume and try extroot (using fstab from that vol) */ 1581 mkdir_p(cfg); 1582 if (!mount(blkdev_path, cfg, "ubifs", MS_NOATIME, NULL)) { 1583 err = mount_extroot(cfg); 1584 umount2(cfg, MNT_DETACH); 1585 } 1586 if (err < 0) 1587 rmdir("/tmp/overlay"); 1588 rmdir(cfg); 1589 return err; 1590 } 1591 #endif 1592 1593 /* As a last resort look for /etc/config/fstab on "rootfs" partition */ 1594 return mount_extroot(NULL); 1595 } 1596 1597 static int main_mount(int argc, char **argv) 1598 { 1599 struct probe_info *pr; 1600 1601 if (config_load(NULL)) 1602 return -1; 1603 1604 cache_load(1); 1605 list_for_each_entry(pr, &devices, list) 1606 mount_device(pr, TYPE_DEV); 1607 1608 handle_swapfiles(true); 1609 1610 return 0; 1611 } 1612 1613 static int main_umount(int argc, char **argv) 1614 { 1615 struct probe_info *pr; 1616 bool all = false; 1617 1618 if (config_load(NULL)) 1619 return -1; 1620 1621 handle_swapfiles(false); 1622 1623 cache_load(0); 1624 1625 if (argc == 3) 1626 all = !strcmp(argv[2], "-a"); 1627 1628 list_for_each_entry(pr, &devices, list) { 1629 struct mount *m; 1630 1631 if (!strcmp(pr->type, "swap")) 1632 continue; 1633 1634 m = find_block(pr->uuid, pr->label, basename(pr->dev), NULL); 1635 if (m && m->extroot) 1636 continue; 1637 1638 umount_device(pr->dev, TYPE_DEV, all); 1639 } 1640 1641 return 0; 1642 } 1643 1644 static int main_detect(int argc, char **argv) 1645 { 1646 struct probe_info *pr; 1647 1648 cache_load(0); 1649 printf("config 'global'\n"); 1650 printf("\toption\tanon_swap\t''\n"); 1651 printf("\toption\tanon_mount\t''\n"); 1652 printf("\toption\tauto_swap\t'1'\n"); 1653 printf("\toption\tauto_mount\t'1'\n"); 1654 printf("\toption\tdelay_root\t'5'\n"); 1655 printf("\toption\tcheck_fs\t''\n\n"); 1656 list_for_each_entry(pr, &devices, list) 1657 print_block_uci(pr); 1658 1659 return 0; 1660 } 1661 1662 static int main_info(int argc, char **argv) 1663 { 1664 int i; 1665 struct probe_info *pr; 1666 1667 cache_load(1); 1668 if (argc == 2) { 1669 list_for_each_entry(pr, &devices, list) 1670 print_block_info(pr); 1671 1672 return 0; 1673 }; 1674 1675 for (i = 2; i < argc; i++) { 1676 struct stat s; 1677 1678 if (stat(argv[i], &s)) { 1679 ULOG_ERR("failed to stat %s\n", argv[i]); 1680 continue; 1681 } 1682 if (!S_ISBLK(s.st_mode) && !(S_ISCHR(s.st_mode) && major(s.st_rdev) == 250)) { 1683 ULOG_ERR("%s is not a block device\n", argv[i]); 1684 continue; 1685 } 1686 pr = find_block_info(NULL, NULL, argv[i]); 1687 if (pr) 1688 print_block_info(pr); 1689 } 1690 1691 return 0; 1692 } 1693 1694 static int swapon_usage(void) 1695 { 1696 fprintf(stderr, "Usage: swapon [-s] [-a] [[-p pri] DEVICE]\n\n" 1697 "\tStart swapping on [DEVICE]\n" 1698 " -a\tStart swapping on all swap devices\n" 1699 " -p pri\tSet priority of swap device\n" 1700 " -s\tShow summary\n"); 1701 return -1; 1702 } 1703 1704 static int main_swapon(int argc, char **argv) 1705 { 1706 int ch; 1707 FILE *fp; 1708 char *lineptr; 1709 size_t s; 1710 struct probe_info *pr; 1711 int flags = 0; 1712 int pri; 1713 struct stat st; 1714 int err; 1715 1716 while ((ch = getopt(argc, argv, "ap:s")) != -1) { 1717 switch(ch) { 1718 case 's': 1719 fp = fopen("/proc/swaps", "r"); 1720 lineptr = NULL; 1721 1722 if (!fp) { 1723 ULOG_ERR("failed to open /proc/swaps\n"); 1724 return -1; 1725 } 1726 while (getline(&lineptr, &s, fp) > 0) 1727 printf("%s", lineptr); 1728 if (lineptr) 1729 free(lineptr); 1730 fclose(fp); 1731 return 0; 1732 case 'a': 1733 cache_load(0); 1734 list_for_each_entry(pr, &devices, list) { 1735 if (strcmp(pr->type, "swap")) 1736 continue; 1737 if (swapon(pr->dev, 0)) 1738 ULOG_ERR("failed to swapon %s\n", pr->dev); 1739 } 1740 return 0; 1741 case 'p': 1742 pri = atoi(optarg); 1743 if (pri >= 0) 1744 flags = ((pri << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER; 1745 break; 1746 default: 1747 return swapon_usage(); 1748 } 1749 } 1750 1751 if (optind != (argc - 1)) 1752 return swapon_usage(); 1753 1754 if (stat(argv[optind], &st) || (!S_ISBLK(st.st_mode) && !S_ISREG(st.st_mode))) { 1755 ULOG_ERR("%s is not a block device or file\n", argv[optind]); 1756 return -1; 1757 } 1758 err = swapon(argv[optind], flags); 1759 if (err) { 1760 ULOG_ERR("failed to swapon %s (%d)\n", argv[optind], err); 1761 return err; 1762 } 1763 1764 return 0; 1765 } 1766 1767 static int main_swapoff(int argc, char **argv) 1768 { 1769 if (argc != 2) { 1770 ULOG_ERR("Usage: swapoff [-a] [DEVICE]\n\n" 1771 "\tStop swapping on DEVICE\n" 1772 " -a\tStop swapping on all swap devices\n"); 1773 return -1; 1774 } 1775 1776 if (!strcmp(argv[1], "-a")) { 1777 FILE *fp = fopen("/proc/swaps", "r"); 1778 char line[256]; 1779 1780 if (!fp) { 1781 ULOG_ERR("failed to open /proc/swaps\n"); 1782 return -1; 1783 } 1784 if (fgets(line, sizeof(line), fp)) 1785 while (fgets(line, sizeof(line), fp)) { 1786 char *end = strchr(line, ' '); 1787 int err; 1788 1789 if (!end) 1790 continue; 1791 *end = '\0'; 1792 err = swapoff(line); 1793 if (err) 1794 ULOG_ERR("failed to swapoff %s (%d)\n", line, err); 1795 } 1796 fclose(fp); 1797 } else { 1798 struct stat s; 1799 int err; 1800 1801 if (stat(argv[1], &s) || (!S_ISBLK(s.st_mode) && !S_ISREG(s.st_mode))) { 1802 ULOG_ERR("%s is not a block device or file\n", argv[1]); 1803 return -1; 1804 } 1805 err = swapoff(argv[1]); 1806 if (err) { 1807 ULOG_ERR("failed to swapoff %s (%d)\n", argv[1], err); 1808 return err; 1809 } 1810 } 1811 1812 return 0; 1813 } 1814 1815 int main(int argc, char **argv) 1816 { 1817 char *base = basename(*argv); 1818 1819 umask(0); 1820 1821 ulog_open(-1, -1, "block"); 1822 ulog_threshold(LOG_NOTICE); 1823 1824 if (!strcmp(base, "swapon")) 1825 return main_swapon(argc, argv); 1826 1827 if (!strcmp(base, "swapoff")) 1828 return main_swapoff(argc, argv); 1829 1830 if ((argc > 1) && !strcmp(base, "block")) { 1831 if (!strcmp(argv[1], "info")) 1832 return main_info(argc, argv); 1833 1834 if (!strcmp(argv[1], "detect")) 1835 return main_detect(argc, argv); 1836 1837 if (!strcmp(argv[1], "hotplug")) 1838 return main_hotplug(argc, argv); 1839 1840 if (!strcmp(argv[1], "autofs")) 1841 return main_autofs(argc, argv); 1842 1843 if (!strcmp(argv[1], "extroot")) 1844 return main_extroot(argc, argv); 1845 1846 if (!strcmp(argv[1], "mount")) 1847 return main_mount(argc, argv); 1848 1849 if (!strcmp(argv[1], "umount")) 1850 return main_umount(argc, argv); 1851 1852 if (!strcmp(argv[1], "remount")) { 1853 int ret = main_umount(argc, argv); 1854 1855 if (!ret) 1856 ret = main_mount(argc, argv); 1857 return ret; 1858 } 1859 } 1860 1861 ULOG_ERR("Usage: block <info|mount|umount|detect>\n"); 1862 1863 return -1; 1864 } 1865
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