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 <uci.h> 37 #include <uci_blob.h> 38 39 #include <libubox/avl-cmp.h> 40 #include <libubox/blobmsg_json.h> 41 #include <libubox/list.h> 42 #include <libubox/ulog.h> 43 #include <libubox/utils.h> 44 #include <libubox/vlist.h> 45 #include <libubus.h> 46 47 #include "probe.h" 48 49 #define AUTOFS_MOUNT_PATH "/tmp/run/blockd/" 50 51 #ifdef UBIFS_EXTROOT 52 #include "libubi/libubi.h" 53 #endif 54 55 enum { 56 TYPE_MOUNT, 57 TYPE_SWAP, 58 }; 59 60 enum { 61 TYPE_DEV, 62 TYPE_HOTPLUG, 63 TYPE_AUTOFS, 64 }; 65 66 struct mount { 67 struct vlist_node node; 68 int type; 69 70 char *target; 71 char *path; 72 char *options; 73 uint32_t flags; 74 char *uuid; 75 char *label; 76 char *device; 77 int extroot; 78 int autofs; 79 int overlay; 80 int disabled_fsck; 81 unsigned int prio; 82 }; 83 84 static struct vlist_tree mounts; 85 static struct blob_buf b; 86 static LIST_HEAD(devices); 87 static int anon_mount, anon_swap, auto_mount, auto_swap, check_fs; 88 static unsigned int delay_root; 89 90 enum { 91 CFG_ANON_MOUNT, 92 CFG_ANON_SWAP, 93 CFG_AUTO_MOUNT, 94 CFG_AUTO_SWAP, 95 CFG_DELAY_ROOT, 96 CFG_CHECK_FS, 97 __CFG_MAX 98 }; 99 100 static const struct blobmsg_policy config_policy[__CFG_MAX] = { 101 [CFG_ANON_SWAP] = { .name = "anon_swap", .type = BLOBMSG_TYPE_INT32 }, 102 [CFG_ANON_MOUNT] = { .name = "anon_mount", .type = BLOBMSG_TYPE_INT32 }, 103 [CFG_AUTO_SWAP] = { .name = "auto_swap", .type = BLOBMSG_TYPE_INT32 }, 104 [CFG_AUTO_MOUNT] = { .name = "auto_mount", .type = BLOBMSG_TYPE_INT32 }, 105 [CFG_DELAY_ROOT] = { .name = "delay_root", .type = BLOBMSG_TYPE_INT32 }, 106 [CFG_CHECK_FS] = { .name = "check_fs", .type = BLOBMSG_TYPE_INT32 }, 107 }; 108 109 enum { 110 MOUNT_UUID, 111 MOUNT_LABEL, 112 MOUNT_ENABLE, 113 MOUNT_TARGET, 114 MOUNT_DEVICE, 115 MOUNT_OPTIONS, 116 MOUNT_AUTOFS, 117 __MOUNT_MAX 118 }; 119 120 static const struct uci_blob_param_list config_attr_list = { 121 .n_params = __CFG_MAX, 122 .params = config_policy, 123 }; 124 125 static const struct blobmsg_policy mount_policy[__MOUNT_MAX] = { 126 [MOUNT_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING }, 127 [MOUNT_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING }, 128 [MOUNT_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING }, 129 [MOUNT_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING }, 130 [MOUNT_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_STRING }, 131 [MOUNT_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 }, 132 [MOUNT_AUTOFS] = { .name = "autofs", .type = BLOBMSG_TYPE_INT32 }, 133 }; 134 135 static const struct uci_blob_param_list mount_attr_list = { 136 .n_params = __MOUNT_MAX, 137 .params = mount_policy, 138 }; 139 140 enum { 141 SWAP_ENABLE, 142 SWAP_UUID, 143 SWAP_LABEL, 144 SWAP_DEVICE, 145 SWAP_PRIO, 146 __SWAP_MAX 147 }; 148 149 static const struct blobmsg_policy swap_policy[__SWAP_MAX] = { 150 [SWAP_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 }, 151 [SWAP_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING }, 152 [SWAP_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING }, 153 [SWAP_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING }, 154 [SWAP_PRIO] = { .name = "priority", .type = BLOBMSG_TYPE_INT32 }, 155 }; 156 157 static const struct uci_blob_param_list swap_attr_list = { 158 .n_params = __SWAP_MAX, 159 .params = swap_policy, 160 }; 161 162 struct mount_flag { 163 const char *name; 164 int32_t flag; 165 }; 166 167 static const struct mount_flag mount_flags[] = { 168 { "sync", MS_SYNCHRONOUS }, 169 { "async", ~MS_SYNCHRONOUS }, 170 { "dirsync", MS_DIRSYNC }, 171 { "mand", MS_MANDLOCK }, 172 { "nomand", ~MS_MANDLOCK }, 173 { "atime", ~MS_NOATIME }, 174 { "noatime", MS_NOATIME }, 175 { "dev", ~MS_NODEV }, 176 { "nodev", MS_NODEV }, 177 { "diratime", ~MS_NODIRATIME }, 178 { "nodiratime", MS_NODIRATIME }, 179 { "exec", ~MS_NOEXEC }, 180 { "noexec", MS_NOEXEC }, 181 { "suid", ~MS_NOSUID }, 182 { "nosuid", MS_NOSUID }, 183 { "rw", ~MS_RDONLY }, 184 { "ro", MS_RDONLY }, 185 { "relatime", MS_RELATIME }, 186 { "norelatime", ~MS_RELATIME }, 187 { "strictatime", MS_STRICTATIME }, 188 { "acl", MS_POSIXACL }, 189 { "noacl", ~MS_POSIXACL }, 190 { "nouser_xattr", MS_NOUSER }, 191 { "user_xattr", ~MS_NOUSER }, 192 }; 193 194 static char *blobmsg_get_strdup(struct blob_attr *attr) 195 { 196 if (!attr) 197 return NULL; 198 199 return strdup(blobmsg_get_string(attr)); 200 } 201 202 static char *blobmsg_get_basename(struct blob_attr *attr) 203 { 204 if (!attr) 205 return NULL; 206 207 return strdup(basename(blobmsg_get_string(attr))); 208 } 209 210 static void parse_mount_options(struct mount *m, char *optstr) 211 { 212 int i; 213 bool is_flag; 214 char *p, *opts, *last; 215 216 m->flags = 0; 217 m->options = NULL; 218 219 if (!optstr || !*optstr) 220 return; 221 222 m->options = opts = calloc(1, strlen(optstr) + 1); 223 224 if (!m->options) 225 return; 226 227 p = last = optstr; 228 229 do { 230 p = strchr(p, ','); 231 232 if (p) 233 *p++ = 0; 234 235 for (i = 0, is_flag = false; i < ARRAY_SIZE(mount_flags); i++) { 236 if (!strcmp(last, mount_flags[i].name)) { 237 if (mount_flags[i].flag < 0) 238 m->flags &= (uint32_t)mount_flags[i].flag; 239 else 240 m->flags |= (uint32_t)mount_flags[i].flag; 241 is_flag = true; 242 break; 243 } 244 } 245 246 if (!is_flag) 247 opts += sprintf(opts, "%s%s", (opts > m->options) ? "," : "", last); 248 249 last = p; 250 251 } while (p); 252 253 free(optstr); 254 } 255 256 static int mount_add(struct uci_section *s) 257 { 258 struct blob_attr *tb[__MOUNT_MAX] = { 0 }; 259 struct mount *m; 260 261 blob_buf_init(&b, 0); 262 uci_to_blob(&b, s, &mount_attr_list); 263 blobmsg_parse(mount_policy, __MOUNT_MAX, tb, blob_data(b.head), blob_len(b.head)); 264 265 if (!tb[MOUNT_LABEL] && !tb[MOUNT_UUID] && !tb[MOUNT_DEVICE]) 266 return -1; 267 268 if (tb[MOUNT_ENABLE] && !blobmsg_get_u32(tb[MOUNT_ENABLE])) 269 return -1; 270 271 m = malloc(sizeof(struct mount)); 272 m->type = TYPE_MOUNT; 273 m->uuid = blobmsg_get_strdup(tb[MOUNT_UUID]); 274 m->label = blobmsg_get_strdup(tb[MOUNT_LABEL]); 275 m->target = blobmsg_get_strdup(tb[MOUNT_TARGET]); 276 m->device = blobmsg_get_basename(tb[MOUNT_DEVICE]); 277 if (tb[MOUNT_AUTOFS]) 278 m->autofs = blobmsg_get_u32(tb[MOUNT_AUTOFS]); 279 else 280 m->autofs = 0; 281 parse_mount_options(m, blobmsg_get_strdup(tb[MOUNT_OPTIONS])); 282 283 m->overlay = m->extroot = 0; 284 if (m->target && !strcmp(m->target, "/")) 285 m->extroot = 1; 286 if (m->target && !strcmp(m->target, "/overlay")) 287 m->extroot = m->overlay = 1; 288 289 if (m->target && *m->target != '/') { 290 ULOG_WARN("ignoring mount section %s due to invalid target '%s'\n", 291 s->e.name, m->target); 292 free(m); 293 return -1; 294 } 295 296 if (m->uuid) 297 vlist_add(&mounts, &m->node, m->uuid); 298 else if (m->label) 299 vlist_add(&mounts, &m->node, m->label); 300 else if (m->device) 301 vlist_add(&mounts, &m->node, m->device); 302 303 return 0; 304 } 305 306 static int swap_add(struct uci_section *s) 307 { 308 struct blob_attr *tb[__SWAP_MAX] = { 0 }; 309 struct mount *m; 310 311 blob_buf_init(&b, 0); 312 uci_to_blob(&b, s, &swap_attr_list); 313 blobmsg_parse(swap_policy, __SWAP_MAX, tb, blob_data(b.head), blob_len(b.head)); 314 315 if (!tb[SWAP_UUID] && !tb[SWAP_LABEL] && !tb[SWAP_DEVICE]) 316 return -1; 317 318 m = malloc(sizeof(struct mount)); 319 memset(m, 0, sizeof(struct mount)); 320 m->type = TYPE_SWAP; 321 m->uuid = blobmsg_get_strdup(tb[SWAP_UUID]); 322 m->label = blobmsg_get_strdup(tb[SWAP_LABEL]); 323 m->device = blobmsg_get_basename(tb[SWAP_DEVICE]); 324 if (tb[SWAP_PRIO]) 325 m->prio = blobmsg_get_u32(tb[SWAP_PRIO]); 326 if (m->prio) 327 m->prio = ((m->prio << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER; 328 329 if ((!tb[SWAP_ENABLE]) || blobmsg_get_u32(tb[SWAP_ENABLE])) { 330 /* store complete swap path */ 331 if (tb[SWAP_DEVICE]) 332 m->target = blobmsg_get_strdup(tb[SWAP_DEVICE]); 333 334 if (m->uuid) 335 vlist_add(&mounts, &m->node, m->uuid); 336 else if (m->label) 337 vlist_add(&mounts, &m->node, m->label); 338 else if (m->device) 339 vlist_add(&mounts, &m->node, m->device); 340 } 341 342 return 0; 343 } 344 345 static int global_add(struct uci_section *s) 346 { 347 struct blob_attr *tb[__CFG_MAX] = { 0 }; 348 349 blob_buf_init(&b, 0); 350 uci_to_blob(&b, s, &config_attr_list); 351 blobmsg_parse(config_policy, __CFG_MAX, tb, blob_data(b.head), blob_len(b.head)); 352 353 if ((tb[CFG_ANON_MOUNT]) && blobmsg_get_u32(tb[CFG_ANON_MOUNT])) 354 anon_mount = 1; 355 if ((tb[CFG_ANON_SWAP]) && blobmsg_get_u32(tb[CFG_ANON_SWAP])) 356 anon_swap = 1; 357 358 if ((tb[CFG_AUTO_MOUNT]) && blobmsg_get_u32(tb[CFG_AUTO_MOUNT])) 359 auto_mount = 1; 360 if ((tb[CFG_AUTO_SWAP]) && blobmsg_get_u32(tb[CFG_AUTO_SWAP])) 361 auto_swap = 1; 362 363 if (tb[CFG_DELAY_ROOT]) 364 delay_root = blobmsg_get_u32(tb[CFG_DELAY_ROOT]); 365 366 if ((tb[CFG_CHECK_FS]) && blobmsg_get_u32(tb[CFG_CHECK_FS])) 367 check_fs = 1; 368 369 return 0; 370 } 371 372 static struct mount* find_swap(const char *uuid, const char *label, const char *device) 373 { 374 struct mount *m; 375 376 vlist_for_each_element(&mounts, m, node) { 377 if (m->type != TYPE_SWAP) 378 continue; 379 if (uuid && m->uuid && !strcasecmp(m->uuid, uuid)) 380 return m; 381 if (label && m->label && !strcmp(m->label, label)) 382 return m; 383 if (device && m->device && !strcmp(m->device, device)) 384 return m; 385 } 386 387 return NULL; 388 } 389 390 static struct mount* find_block(const char *uuid, const char *label, const char *device, 391 const char *target) 392 { 393 struct mount *m; 394 395 vlist_for_each_element(&mounts, m, node) { 396 if (m->type != TYPE_MOUNT) 397 continue; 398 if (m->uuid && uuid && !strcasecmp(m->uuid, uuid)) 399 return m; 400 if (m->label && label && !strcmp(m->label, label)) 401 return m; 402 if (m->target && target && !strcmp(m->target, target)) 403 return m; 404 if (m->device && device && !strcmp(m->device, device)) 405 return m; 406 } 407 408 return NULL; 409 } 410 411 static void mounts_update(struct vlist_tree *tree, struct vlist_node *node_new, 412 struct vlist_node *node_old) 413 { 414 } 415 416 static struct uci_package * config_try_load(struct uci_context *ctx, char *path) 417 { 418 char *file = basename(path); 419 char *dir = dirname(path); 420 char *err; 421 struct uci_package *pkg; 422 423 uci_set_confdir(ctx, dir); 424 ULOG_INFO("attempting to load %s/%s\n", dir, file); 425 426 if (uci_load(ctx, file, &pkg)) { 427 uci_get_errorstr(ctx, &err, file); 428 ULOG_ERR("unable to load configuration (%s)\n", err); 429 430 free(err); 431 return NULL; 432 } 433 434 return pkg; 435 } 436 437 static int config_load(char *cfg) 438 { 439 struct uci_context *ctx = uci_alloc_context(); 440 struct uci_package *pkg = NULL; 441 struct uci_element *e; 442 char path[64]; 443 444 vlist_init(&mounts, avl_strcmp, mounts_update); 445 446 if (cfg) { 447 snprintf(path, sizeof(path), "%s/upper/etc/config/fstab", cfg); 448 pkg = config_try_load(ctx, path); 449 450 if (!pkg) { 451 snprintf(path, sizeof(path), "%s/etc/config/fstab", cfg); 452 pkg = config_try_load(ctx, path); 453 } 454 } 455 456 if (!pkg) { 457 snprintf(path, sizeof(path), "/etc/config/fstab"); 458 pkg = config_try_load(ctx, path); 459 } 460 461 if (!pkg) { 462 ULOG_ERR("no usable configuration\n"); 463 return -1; 464 } 465 466 vlist_update(&mounts); 467 uci_foreach_element(&pkg->sections, e) { 468 struct uci_section *s = uci_to_section(e); 469 470 if (!strcmp(s->type, "mount")) 471 mount_add(s); 472 if (!strcmp(s->type, "swap")) 473 swap_add(s); 474 if (!strcmp(s->type, "global")) 475 global_add(s); 476 } 477 vlist_flush(&mounts); 478 479 return 0; 480 } 481 482 static bool mtdblock_is_nand(char *mtdnum) 483 { 484 char tmppath[64]; 485 char buf[16]; 486 FILE *fp; 487 488 snprintf(tmppath, sizeof(tmppath) - 1, "/sys/class/mtd/mtd%s/type", mtdnum); 489 fp = fopen(tmppath, "r"); 490 if (!fp) 491 return false; 492 493 if (!fgets(buf, sizeof(buf), fp)) { 494 fclose(fp); 495 return false; 496 } 497 fclose(fp); 498 buf[sizeof(buf) - 1] = '\0'; /* make sure buf is 0-terminated */ 499 buf[strlen(buf) - 1] = '\0'; /* strip final char (newline) */ 500 501 if (strcmp(buf, "nand")) 502 return false; 503 504 /* 505 * --- CUT HERE --- 506 * Keep probing rootfs and rootfs_data in the meantime to not break 507 * devices using JFFS2 on NAND but only trigger the kernel warnings. 508 * Remove this once all devices using JFFS2 and squashfs directly on 509 * NAND have been converted to UBI. 510 */ 511 snprintf(tmppath, sizeof(tmppath) - 1, "/sys/class/mtd/mtd%s/name", mtdnum); 512 fp = fopen(tmppath, "r"); 513 if (!fp) 514 return false; 515 516 if (!fgets(buf, sizeof(buf), fp)) { 517 fclose(fp); 518 return false; 519 } 520 fclose(fp); 521 buf[sizeof(buf) - 1] = '\0'; /* make sure buf is 0-terminated */ 522 buf[strlen(buf) - 1] = '\0'; /* strip final char (newline) */ 523 524 /* only return true if name differs from 'rootfs' and 'rootfs_data' */ 525 if (strcmp(buf, "rootfs") && strcmp(buf, "rootfs_data")) 526 return true; 527 528 /* --- CUT HERE --- */ 529 return false; 530 } 531 532 static struct probe_info* _probe_path(char *path) 533 { 534 struct probe_info *pr, *epr; 535 char tmppath[64]; 536 537 if (!strncmp(path, "/dev/mtdblock", 13) && mtdblock_is_nand(path + 13)) 538 return NULL; 539 540 pr = probe_path(path); 541 if (!pr) 542 return NULL; 543 544 if (path[5] == 'u' && path[6] == 'b' && path[7] == 'i' && 545 path[8] >= '' && path[8] <= '9' ) { 546 /* skip ubi device if not UBIFS (as it requires ubiblock) */ 547 if (strcmp("ubifs", pr->type)) 548 return NULL; 549 550 /* skip ubi device if ubiblock device is present */ 551 snprintf(tmppath, sizeof(tmppath), "/dev/ubiblock%s", path + 8); 552 list_for_each_entry(epr, &devices, list) 553 if (!strcmp(epr->dev, tmppath)) 554 return NULL; 555 } 556 557 return pr; 558 } 559 560 static int _cache_load(const char *path) 561 { 562 int gl_flags = GLOB_NOESCAPE | GLOB_MARK; 563 int j; 564 glob_t gl; 565 566 if (glob(path, gl_flags, NULL, &gl) < 0) 567 return -1; 568 569 for (j = 0; j < gl.gl_pathc; j++) { 570 struct probe_info *pr = _probe_path(gl.gl_pathv[j]); 571 if (pr) 572 list_add_tail(&pr->list, &devices); 573 } 574 575 globfree(&gl); 576 577 return 0; 578 } 579 580 static void cache_load(int mtd) 581 { 582 if (mtd) { 583 _cache_load("/dev/mtdblock*"); 584 _cache_load("/dev/ubiblock*"); 585 _cache_load("/dev/ubi[0-9]*"); 586 } 587 _cache_load("/dev/loop*"); 588 _cache_load("/dev/mmcblk*"); 589 _cache_load("/dev/sd*"); 590 _cache_load("/dev/hd*"); 591 _cache_load("/dev/md*"); 592 _cache_load("/dev/nvme*"); 593 _cache_load("/dev/vd*"); 594 _cache_load("/dev/xvd*"); 595 _cache_load("/dev/dm-*"); 596 } 597 598 599 static struct probe_info* find_block_info(char *uuid, char *label, char *path) 600 { 601 struct probe_info *pr = NULL; 602 603 if (uuid) 604 list_for_each_entry(pr, &devices, list) 605 if (pr->uuid && !strcasecmp(pr->uuid, uuid)) 606 return pr; 607 608 if (label) 609 list_for_each_entry(pr, &devices, list) 610 if (pr->label && !strcmp(pr->label, label)) 611 return pr; 612 613 if (path) 614 list_for_each_entry(pr, &devices, list) 615 if (pr->dev && !strcmp(basename(pr->dev), basename(path))) 616 return pr; 617 618 return NULL; 619 } 620 621 static char* find_mount_point(char *block) 622 { 623 FILE *fp = fopen("/proc/self/mountinfo", "r"); 624 static char line[256]; 625 char *point = NULL, *pos, *tmp, *cpoint, *devname; 626 struct stat s; 627 int rstat; 628 unsigned int minor, major; 629 630 if (!fp) 631 return NULL; 632 633 rstat = stat(block, &s); 634 635 while (fgets(line, sizeof(line), fp)) { 636 pos = strchr(line, ' '); 637 if (!pos) 638 continue; 639 640 pos = strchr(pos + 1, ' '); 641 if (!pos) 642 continue; 643 644 tmp = ++pos; 645 pos = strchr(pos, ':'); 646 if (!pos) 647 continue; 648 649 *pos = '\0'; 650 major = atoi(tmp); 651 tmp = ++pos; 652 pos = strchr(pos, ' '); 653 if (!pos) 654 continue; 655 656 *pos = '\0'; 657 minor = atoi(tmp); 658 pos = strchr(pos + 1, ' '); 659 if (!pos) 660 continue; 661 tmp = ++pos; 662 663 pos = strchr(pos, ' '); 664 if (!pos) 665 continue; 666 *pos = '\0'; 667 cpoint = tmp; 668 669 pos = strchr(pos + 1, ' '); 670 if (!pos) 671 continue; 672 673 pos = strchr(pos + 1, ' '); 674 if (!pos) 675 continue; 676 677 pos = strchr(pos + 1, ' '); 678 if (!pos) 679 continue; 680 681 tmp = ++pos; 682 pos = strchr(pos, ' '); 683 if (!pos) 684 continue; 685 686 *pos = '\0'; 687 devname = tmp; 688 if (!strcmp(block, devname)) { 689 point = strdup(cpoint); 690 break; 691 } 692 693 if (rstat) 694 continue; 695 696 if (!S_ISBLK(s.st_mode)) 697 continue; 698 699 if (major == major(s.st_rdev) && 700 minor == minor(s.st_rdev)) { 701 point = strdup(cpoint); 702 break; 703 } 704 } 705 706 fclose(fp); 707 708 return point; 709 } 710 711 static int print_block_uci(struct probe_info *pr) 712 { 713 if (!strcmp(pr->type, "swap")) { 714 printf("config 'swap'\n"); 715 } else { 716 char *mp = find_mount_point(pr->dev); 717 718 printf("config 'mount'\n"); 719 if (mp) { 720 printf("\toption\ttarget\t'%s'\n", mp); 721 free(mp); 722 } else { 723 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev)); 724 } 725 } 726 if (pr->uuid) 727 printf("\toption\tuuid\t'%s'\n", pr->uuid); 728 else 729 printf("\toption\tdevice\t'%s'\n", pr->dev); 730 printf("\toption\tenabled\t''\n\n"); 731 732 return 0; 733 } 734 735 static int print_block_info(struct probe_info *pr) 736 { 737 static char *mp; 738 739 mp = find_mount_point(pr->dev); 740 printf("%s:", pr->dev); 741 if (pr->uuid) 742 printf(" UUID=\"%s\"", pr->uuid); 743 744 if (pr->label) 745 printf(" LABEL=\"%s\"", pr->label); 746 747 if (pr->version) 748 printf(" VERSION=\"%s\"", pr->version); 749 750 if (mp) { 751 printf(" MOUNT=\"%s\"", mp); 752 free(mp); 753 } 754 755 printf(" TYPE=\"%s\"\n", pr->type); 756 757 return 0; 758 } 759 760 static void check_filesystem(struct probe_info *pr) 761 { 762 pid_t pid; 763 struct stat statbuf; 764 const char *e2fsck = "/usr/sbin/e2fsck"; 765 const char *f2fsck = "/usr/sbin/fsck.f2fs"; 766 const char *fatfsck = "/usr/sbin/fsck.fat"; 767 const char *btrfsck = "/usr/bin/btrfsck"; 768 const char *ntfsck = "/usr/bin/ntfsfix"; 769 const char *ckfs; 770 771 /* UBIFS does not need stuff like fsck */ 772 if (!strncmp(pr->type, "ubifs", 5)) 773 return; 774 775 if (!strncmp(pr->type, "vfat", 4)) { 776 ckfs = fatfsck; 777 } else if (!strncmp(pr->type, "f2fs", 4)) { 778 ckfs = f2fsck; 779 } else if (!strncmp(pr->type, "ext", 3)) { 780 ckfs = e2fsck; 781 } else if (!strncmp(pr->type, "btrfs", 5)) { 782 ckfs = btrfsck; 783 } else if (!strncmp(pr->type, "ntfs", 4)) { 784 ckfs = ntfsck; 785 } else { 786 ULOG_ERR("check_filesystem: %s is not supported\n", pr->type); 787 return; 788 } 789 790 if (stat(ckfs, &statbuf) < 0) { 791 ULOG_ERR("check_filesystem: %s not found\n", ckfs); 792 return; 793 } 794 795 pid = fork(); 796 if (!pid) { 797 if(!strncmp(pr->type, "f2fs", 4)) { 798 execl(ckfs, ckfs, "-f", pr->dev, NULL); 799 exit(EXIT_FAILURE); 800 } else if(!strncmp(pr->type, "btrfs", 5)) { 801 execl(ckfs, ckfs, "--repair", pr->dev, NULL); 802 exit(EXIT_FAILURE); 803 } else if(!strncmp(pr->type, "ntfs", 4)) { 804 execl(ckfs, ckfs, "-b", pr->dev, NULL); 805 exit(EXIT_FAILURE); 806 } else { 807 execl(ckfs, ckfs, "-p", pr->dev, NULL); 808 exit(EXIT_FAILURE); 809 } 810 } else if (pid > 0) { 811 int status; 812 813 waitpid(pid, &status, 0); 814 if (WIFEXITED(status) && WEXITSTATUS(status)) 815 ULOG_ERR("check_filesystem: %s returned %d\n", ckfs, WEXITSTATUS(status)); 816 if (WIFSIGNALED(status)) 817 ULOG_ERR("check_filesystem: %s terminated by %s\n", ckfs, strsignal(WTERMSIG(status))); 818 } 819 } 820 821 static void handle_swapfiles(bool on) 822 { 823 struct stat s; 824 struct mount *m; 825 struct probe_info *pr; 826 827 vlist_for_each_element(&mounts, m, node) 828 { 829 if (m->type != TYPE_SWAP || !m->target) 830 continue; 831 832 if (stat(m->target, &s) || !S_ISREG(s.st_mode)) 833 continue; 834 835 pr = _probe_path(m->target); 836 837 if (!pr) 838 continue; 839 840 if (!strcmp(pr->type, "swap")) { 841 if (on) 842 swapon(pr->dev, m->prio); 843 else 844 swapoff(pr->dev); 845 } 846 847 free(pr); 848 } 849 } 850 851 static void to_devnull(int fd) 852 { 853 int devnull = open("/dev/null", fd ? O_WRONLY : O_RDONLY); 854 855 if (devnull >= 0) 856 dup2(devnull, fd); 857 858 if (devnull > STDERR_FILENO) 859 close(devnull); 860 } 861 862 static int exec_mount(const char *source, const char *target, 863 const char *fstype, const char *options) 864 { 865 pid_t pid; 866 struct stat s; 867 FILE *mount_fd; 868 int err, status, pfds[2]; 869 char errmsg[128], cmd[sizeof("/sbin/mount.XXXXXXXXXXXXXXXX\0")]; 870 871 snprintf(cmd, sizeof(cmd), "/sbin/mount.%s", fstype); 872 873 if (stat(cmd, &s) < 0 || !S_ISREG(s.st_mode) || !(s.st_mode & S_IXUSR)) { 874 ULOG_ERR("No \"mount.%s\" utility available\n", fstype); 875 return -1; 876 } 877 878 if (pipe(pfds) < 0) 879 return -1; 880 881 fcntl(pfds[0], F_SETFD, fcntl(pfds[0], F_GETFD) | FD_CLOEXEC); 882 fcntl(pfds[1], F_SETFD, fcntl(pfds[1], F_GETFD) | FD_CLOEXEC); 883 884 pid = vfork(); 885 886 switch (pid) { 887 case -1: 888 close(pfds[0]); 889 close(pfds[1]); 890 891 return -1; 892 893 case 0: 894 to_devnull(STDIN_FILENO); 895 to_devnull(STDOUT_FILENO); 896 897 dup2(pfds[1], STDERR_FILENO); 898 close(pfds[0]); 899 close(pfds[1]); 900 901 if (options && *options) 902 execl(cmd, cmd, "-o", options, source, target, NULL); 903 else 904 execl(cmd, cmd, source, target, NULL); 905 906 return -1; 907 908 default: 909 close(pfds[1]); 910 911 mount_fd = fdopen(pfds[0], "r"); 912 913 while (fgets(errmsg, sizeof(errmsg), mount_fd)) 914 ULOG_ERR("mount.%s: %s", fstype, errmsg); 915 916 fclose(mount_fd); 917 918 err = waitpid(pid, &status, 0); 919 920 if (err != -1) { 921 if (status != 0) { 922 ULOG_ERR("mount.%s: failed with status %d\n", fstype, status); 923 errno = EINVAL; 924 err = -1; 925 } else { 926 errno = 0; 927 err = 0; 928 } 929 } 930 931 break; 932 } 933 934 return err; 935 } 936 937 static int handle_mount(const char *source, const char *target, 938 const char *fstype, struct mount *m) 939 { 940 int i, err; 941 size_t mount_opts_len; 942 char *mount_opts = NULL, *ptr; 943 944 err = mount(source, target, fstype, m ? m->flags : 0, 945 (m && m->options) ? m->options : ""); 946 947 /* Requested file system type is not available in kernel, 948 attempt to call mount helper. */ 949 if (err == -1 && errno == ENODEV) { 950 if (m) { 951 /* Convert mount flags back into string representation, 952 first calculate needed length of string buffer... */ 953 mount_opts_len = 1 + (m->options ? strlen(m->options) : 0); 954 955 for (i = 0; i < ARRAY_SIZE(mount_flags); i++) 956 if ((mount_flags[i].flag > 0) && 957 (mount_flags[i].flag < INT_MAX) && 958 (m->flags & (uint32_t)mount_flags[i].flag)) 959 mount_opts_len += strlen(mount_flags[i].name) + 1; 960 961 /* ... then now allocate and fill it ... */ 962 ptr = mount_opts = calloc(1, mount_opts_len); 963 964 if (!ptr) { 965 errno = ENOMEM; 966 return -1; 967 } 968 969 if (m->options) 970 ptr += sprintf(ptr, "%s,", m->options); 971 972 for (i = 0; i < ARRAY_SIZE(mount_flags); i++) 973 if ((mount_flags[i].flag > 0) && 974 (mount_flags[i].flag < INT_MAX) && 975 (m->flags & (uint32_t)mount_flags[i].flag)) 976 ptr += sprintf(ptr, "%s,", mount_flags[i].name); 977 978 mount_opts[mount_opts_len - 1] = 0; 979 } 980 981 /* ... and now finally invoke the external mount program */ 982 err = exec_mount(source, target, fstype, mount_opts); 983 } 984 985 free(mount_opts); 986 987 return err; 988 } 989 990 static int blockd_notify(const char *method, char *device, struct mount *m, 991 struct probe_info *pr) 992 { 993 struct ubus_context *ctx = ubus_connect(NULL); 994 uint32_t id; 995 int err; 996 997 if (!ctx) 998 return -ENXIO; 999 1000 if (!ubus_lookup_id(ctx, "block", &id)) { 1001 struct blob_buf buf = { 0 }; 1002 char *d = strrchr(device, '/'); 1003 1004 if (d) 1005 d++; 1006 else 1007 d = device; 1008 1009 blob_buf_init(&buf, 0); 1010 1011 if (m) { 1012 1013 blobmsg_add_string(&buf, "device", d); 1014 if (m->uuid) 1015 blobmsg_add_string(&buf, "uuid", m->uuid); 1016 if (m->label) 1017 blobmsg_add_string(&buf, "label", m->label); 1018 if (m->target) 1019 blobmsg_add_string(&buf, "target", m->target); 1020 if (m->options) 1021 blobmsg_add_string(&buf, "options", m->options); 1022 if (m->autofs) 1023 blobmsg_add_u32(&buf, "autofs", m->autofs); 1024 if (pr->type) 1025 blobmsg_add_string(&buf, "type", pr->type); 1026 if (pr->version) 1027 blobmsg_add_string(&buf, "version", pr->version); 1028 } else if (pr) { 1029 blobmsg_add_string(&buf, "device", d); 1030 if (pr->uuid) 1031 blobmsg_add_string(&buf, "uuid", pr->uuid); 1032 if (pr->label) 1033 blobmsg_add_string(&buf, "label", pr->label); 1034 if (pr->type) 1035 blobmsg_add_string(&buf, "type", pr->type); 1036 if (pr->version) 1037 blobmsg_add_string(&buf, "version", pr->version); 1038 blobmsg_add_u32(&buf, "anon", 1); 1039 } else { 1040 blobmsg_add_string(&buf, "device", d); 1041 blobmsg_add_u32(&buf, "remove", 1); 1042 } 1043 1044 err = ubus_invoke(ctx, id, method, buf.head, NULL, NULL, 3000); 1045 } else { 1046 err = -ENOENT; 1047 } 1048 1049 ubus_free(ctx); 1050 1051 return err; 1052 } 1053 1054 static int mount_device(struct probe_info *pr, int type) 1055 { 1056 struct mount *m; 1057 struct stat st; 1058 char *_target = NULL; 1059 char *target; 1060 char *device; 1061 char *mp; 1062 int err; 1063 1064 if (!pr) 1065 return -1; 1066 1067 device = basename(pr->dev); 1068 1069 if (!strcmp(pr->type, "swap")) { 1070 if ((type == TYPE_HOTPLUG) && !auto_swap) 1071 return -1; 1072 m = find_swap(pr->uuid, pr->label, device); 1073 if (m || anon_swap) 1074 swapon(pr->dev, (m) ? (m->prio) : (0)); 1075 1076 return 0; 1077 } 1078 1079 m = find_block(pr->uuid, pr->label, device, NULL); 1080 if (m && m->extroot) 1081 return -1; 1082 1083 mp = find_mount_point(pr->dev); 1084 if (mp) { 1085 if (m && m->type == TYPE_MOUNT && m->target && strcmp(m->target, mp)) { 1086 ULOG_ERR("%s is already mounted on %s\n", pr->dev, mp); 1087 err = -1; 1088 } else 1089 err = 0; 1090 free(mp); 1091 return err; 1092 } 1093 1094 if (type == TYPE_HOTPLUG) 1095 blockd_notify("hotplug", device, m, pr); 1096 1097 /* Check if device should be mounted & set the target directory */ 1098 if (m) { 1099 switch (type) { 1100 case TYPE_HOTPLUG: 1101 if (m->autofs) 1102 return 0; 1103 if (!auto_mount) 1104 return -1; 1105 break; 1106 case TYPE_AUTOFS: 1107 if (!m->autofs) 1108 return -1; 1109 break; 1110 case TYPE_DEV: 1111 if (m->autofs) 1112 return -1; 1113 break; 1114 } 1115 1116 if (m->autofs) { 1117 if (asprintf(&_target, "/tmp/run/blockd/%s", device) == -1) 1118 exit(ENOMEM); 1119 1120 target = _target; 1121 } else if (m->target) { 1122 target = m->target; 1123 } else { 1124 if (asprintf(&_target, "/mnt/%s", device) == -1) 1125 exit(ENOMEM); 1126 1127 target = _target; 1128 } 1129 } else if (anon_mount) { 1130 if (asprintf(&_target, "/mnt/%s", device) == -1) 1131 exit(ENOMEM); 1132 1133 target = _target; 1134 } else { 1135 /* No reason to mount this device */ 1136 return 0; 1137 } 1138 1139 /* Mount the device */ 1140 1141 if (check_fs) 1142 check_filesystem(pr); 1143 1144 mkdir_p(target, 0755); 1145 if (!lstat(target, &st) && S_ISLNK(st.st_mode)) 1146 unlink(target); 1147 1148 err = handle_mount(pr->dev, target, pr->type, m); 1149 if (err) { 1150 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %m\n", 1151 pr->dev, pr->type, target, errno); 1152 1153 if (_target) 1154 free(_target); 1155 1156 return err; 1157 } 1158 1159 if (_target) 1160 free(_target); 1161 1162 handle_swapfiles(true); 1163 1164 if (type != TYPE_AUTOFS) 1165 blockd_notify("mount", device, NULL, NULL); 1166 1167 return 0; 1168 } 1169 1170 static int umount_device(char *path, int type, bool all) 1171 { 1172 char *mp, *devpath; 1173 int err; 1174 1175 if (strlen(path) > 5 && !strncmp("/dev/", path, 5)) { 1176 mp = find_mount_point(path); 1177 } else { 1178 devpath = malloc(strlen(path) + 6); 1179 strcpy(devpath, "/dev/"); 1180 strcat(devpath, path); 1181 mp = find_mount_point(devpath); 1182 free(devpath); 1183 } 1184 1185 if (!mp) 1186 return -1; 1187 if (!strcmp(mp, "/") && !all) { 1188 free(mp); 1189 return 0; 1190 } 1191 if (type != TYPE_AUTOFS) 1192 blockd_notify("umount", basename(path), NULL, NULL); 1193 1194 err = umount2(mp, MNT_DETACH); 1195 if (err) { 1196 ULOG_ERR("unmounting %s (%s) failed (%d) - %m\n", path, mp, 1197 errno); 1198 } else { 1199 ULOG_INFO("unmounted %s (%s)\n", path, mp); 1200 rmdir(mp); 1201 } 1202 1203 free(mp); 1204 return err; 1205 } 1206 1207 static int mount_action(char *action, char *device, int type) 1208 { 1209 char *path = NULL; 1210 struct probe_info *pr; 1211 1212 if (!action || !device) 1213 return -1; 1214 1215 if (!strcmp(action, "remove")) { 1216 if (type == TYPE_HOTPLUG) 1217 blockd_notify("hotplug", device, NULL, NULL); 1218 1219 umount_device(device, type, true); 1220 1221 return 0; 1222 } else if (strcmp(action, "add")) { 1223 ULOG_ERR("Unkown action %s\n", action); 1224 1225 return -1; 1226 } 1227 1228 if (config_load(NULL)) 1229 return -1; 1230 1231 cache_load(1); 1232 1233 list_for_each_entry(pr, &devices, list) 1234 if (!strcmp(basename(pr->dev), device)) 1235 path = pr->dev; 1236 1237 if (!path) 1238 return -1; 1239 1240 return mount_device(find_block_info(NULL, NULL, path), type); 1241 } 1242 1243 static int main_hotplug(int argc, char **argv) 1244 { 1245 return mount_action(getenv("ACTION"), getenv("DEVNAME"), TYPE_HOTPLUG); 1246 } 1247 1248 static int main_autofs(int argc, char **argv) 1249 { 1250 int err = 0; 1251 1252 if (argc < 3) 1253 return -1; 1254 1255 if (!strcmp(argv[2], "start")) { 1256 struct probe_info *pr; 1257 1258 if (config_load(NULL)) 1259 return -1; 1260 1261 cache_load(1); 1262 list_for_each_entry(pr, &devices, list) { 1263 struct mount *m; 1264 char *mp; 1265 1266 if (!strcmp(pr->type, "swap")) 1267 continue; 1268 1269 m = find_block(pr->uuid, pr->label, NULL, NULL); 1270 if (m && m->extroot) 1271 continue; 1272 1273 blockd_notify("hotplug", pr->dev, m, pr); 1274 if ((!m || !m->autofs) && (mp = find_mount_point(pr->dev))) { 1275 blockd_notify("mount", pr->dev, NULL, NULL); 1276 free(mp); 1277 } 1278 } 1279 } else { 1280 if (argc < 4) 1281 return -EINVAL; 1282 1283 err = mount_action(argv[2], argv[3], TYPE_AUTOFS); 1284 } 1285 1286 if (err) { 1287 ULOG_ERR("autofs: \"%s\" action has failed: %d\n", argv[2], err); 1288 } 1289 1290 return err; 1291 } 1292 1293 static int find_block_mtd(char *name, char *part, int plen) 1294 { 1295 FILE *fp = fopen("/proc/mtd", "r"); 1296 static char line[256]; 1297 char *index = NULL; 1298 1299 if(!fp) 1300 return -1; 1301 1302 while (!index && fgets(line, sizeof(line), fp)) { 1303 if (strstr(line, name)) { 1304 char *eol = strstr(line, ":"); 1305 1306 if (!eol) 1307 continue; 1308 1309 *eol = '\0'; 1310 index = &line[3]; 1311 } 1312 } 1313 1314 fclose(fp); 1315 1316 if (!index) 1317 return -1; 1318 1319 snprintf(part, plen, "/dev/mtdblock%s", index); 1320 1321 return 0; 1322 } 1323 1324 #ifdef UBIFS_EXTROOT 1325 static int find_ubi_vol(libubi_t libubi, char *name, int *dev_num, int *vol_id) 1326 { 1327 int dev = 0; 1328 1329 while (ubi_dev_present(libubi, dev)) 1330 { 1331 struct ubi_dev_info dev_info; 1332 struct ubi_vol_info vol_info; 1333 1334 if (ubi_get_dev_info1(libubi, dev++, &dev_info)) 1335 continue; 1336 if (ubi_get_vol_info1_nm(libubi, dev_info.dev_num, name, &vol_info)) 1337 continue; 1338 1339 *dev_num = dev_info.dev_num; 1340 *vol_id = vol_info.vol_id; 1341 1342 return 0; 1343 } 1344 1345 return -1; 1346 } 1347 1348 static int find_block_ubi(libubi_t libubi, char *name, char *part, int plen) 1349 { 1350 int dev_num; 1351 int vol_id; 1352 int err = -1; 1353 1354 err = find_ubi_vol(libubi, name, &dev_num, &vol_id); 1355 if (!err) 1356 snprintf(part, plen, "/dev/ubi%d_%d", dev_num, vol_id); 1357 1358 return err; 1359 } 1360 1361 static int find_block_ubi_RO(libubi_t libubi, char *name, char *part, int plen) 1362 { 1363 int dev_num; 1364 int vol_id; 1365 int err = -1; 1366 1367 err = find_ubi_vol(libubi, name, &dev_num, &vol_id); 1368 if (!err) 1369 snprintf(part, plen, "/dev/ubiblock%d_%d", dev_num, vol_id); 1370 1371 return err; 1372 } 1373 #endif 1374 1375 static int find_root_dev(char *buf, int len) 1376 { 1377 DIR *d; 1378 dev_t root; 1379 struct stat s; 1380 struct dirent *e; 1381 1382 if (stat("/", &s)) 1383 return -1; 1384 1385 if (!(d = opendir("/dev"))) 1386 return -1; 1387 1388 root = s.st_dev; 1389 1390 while ((e = readdir(d)) != NULL) { 1391 snprintf(buf, len, "/dev/%s", e->d_name); 1392 1393 if (stat(buf, &s) || s.st_rdev != root) 1394 continue; 1395 1396 closedir(d); 1397 return 0; 1398 } 1399 1400 closedir(d); 1401 return -1; 1402 } 1403 1404 static int test_fs_support(const char *name) 1405 { 1406 char line[128], *p; 1407 int rv = -1; 1408 FILE *f; 1409 1410 if ((f = fopen("/proc/filesystems", "r")) != NULL) { 1411 while (fgets(line, sizeof(line), f)) { 1412 p = strtok(line, "\t\n"); 1413 1414 if (p && !strcmp(p, "nodev")) 1415 p = strtok(NULL, "\t\n"); 1416 1417 if (p && !strcmp(p, name)) { 1418 rv = 0; 1419 break; 1420 } 1421 } 1422 fclose(f); 1423 } 1424 1425 return rv; 1426 } 1427 1428 /** 1429 * Check if mounted partition is a valid extroot 1430 * 1431 * @path target mount point 1432 * 1433 * Valid extroot partition has to contain /etc/.extroot-uuid with UUID of root 1434 * device. This function reads UUID and verifies it OR writes UUID to 1435 * .extroot-uuid if it doesn't exist yet (first extroot usage). 1436 */ 1437 static int check_extroot(char *path) 1438 { 1439 struct probe_info *pr = NULL; 1440 struct probe_info *tmp; 1441 struct stat s; 1442 char uuid[64] = { 0 }; 1443 char devpath[32]; 1444 char tag[64]; 1445 FILE *fp; 1446 int err; 1447 1448 err = find_block_mtd("\"rootfs\"", devpath, sizeof(devpath)); 1449 #ifdef UBIFS_EXTROOT 1450 if (err) { 1451 libubi_t libubi; 1452 1453 libubi = libubi_open(); 1454 err = find_block_ubi_RO(libubi, "rootfs", devpath, sizeof(devpath)); 1455 libubi_close(libubi); 1456 } 1457 #endif 1458 if (err) { 1459 err = find_root_dev(devpath, sizeof(devpath)); 1460 } 1461 if (err) { 1462 ULOG_ERR("extroot: unable to determine root device\n"); 1463 return -1; 1464 } 1465 1466 /* Find root device probe_info so we know its UUID */ 1467 list_for_each_entry(tmp, &devices, list) { 1468 if (!strcmp(tmp->dev, devpath)) { 1469 pr = tmp; 1470 break; 1471 } 1472 } 1473 if (!pr) { 1474 ULOG_ERR("extroot: unable to lookup root device %s\n", devpath); 1475 return -1; 1476 } 1477 1478 snprintf(tag, sizeof(tag), "%s/etc", path); 1479 if (stat(tag, &s)) 1480 mkdir_p(tag, 0755); 1481 1482 snprintf(tag, sizeof(tag), "%s/etc/.extroot-uuid", path); 1483 if (stat(tag, &s)) { 1484 fp = fopen(tag, "w+"); 1485 if (!fp) { 1486 ULOG_ERR("extroot: failed to write UUID to %s: %d (%m)\n", 1487 tag, errno); 1488 /* return 0 to continue boot regardless of error */ 1489 return 0; 1490 } 1491 fputs(pr->uuid, fp); 1492 fclose(fp); 1493 return 0; 1494 } 1495 1496 fp = fopen(tag, "r"); 1497 if (!fp) { 1498 ULOG_ERR("extroot: failed to read UUID from %s: %d (%m)\n", tag, 1499 errno); 1500 return -1; 1501 } 1502 1503 if (!fgets(uuid, sizeof(uuid), fp)) 1504 ULOG_ERR("extroot: failed to read UUID from %s: %d (%m)\n", tag, 1505 errno); 1506 fclose(fp); 1507 1508 if (*uuid && !strcasecmp(uuid, pr->uuid)) 1509 return 0; 1510 1511 ULOG_ERR("extroot: UUID mismatch (root: %s, %s: %s)\n", pr->uuid, 1512 basename(path), uuid); 1513 return -1; 1514 } 1515 1516 /* 1517 * Read info about extroot from UCI (using prefix) and mount it. 1518 */ 1519 static int mount_extroot(char *cfg) 1520 { 1521 char overlay[] = "/tmp/extroot/overlay"; 1522 char mnt[] = "/tmp/extroot/mnt"; 1523 char *path = mnt; 1524 struct probe_info *pr; 1525 struct mount *m; 1526 int err = -1; 1527 1528 /* Load @cfg/etc/config/fstab */ 1529 if (config_load(cfg)) 1530 return -2; 1531 1532 /* See if there is extroot-specific mount config */ 1533 m = find_block(NULL, NULL, NULL, "/"); 1534 if (!m) 1535 m = find_block(NULL, NULL, NULL, "/overlay"); 1536 1537 if (!m || !m->extroot) 1538 { 1539 ULOG_INFO("extroot: not configured\n"); 1540 return -1; 1541 } 1542 1543 /* Find block device pointed by the mount config */ 1544 pr = find_block_info(m->uuid, m->label, m->device); 1545 1546 if (!pr && delay_root){ 1547 ULOG_INFO("extroot: device not present, retrying in %u seconds\n", delay_root); 1548 sleep(delay_root); 1549 make_devs(); 1550 cache_load(1); 1551 pr = find_block_info(m->uuid, m->label, m->device); 1552 } 1553 if (pr) { 1554 if (strncmp(pr->type, "ext", 3) && 1555 strncmp(pr->type, "f2fs", 4) && 1556 strncmp(pr->type, "btrfs", 5) && 1557 strncmp(pr->type, "ntfs", 4) && 1558 strncmp(pr->type, "ubifs", 5)) { 1559 ULOG_ERR("extroot: unsupported filesystem %s, try ext4, f2fs, btrfs, ntfs or ubifs\n", pr->type); 1560 return -1; 1561 } 1562 1563 if (test_fs_support(pr->type)) { 1564 ULOG_ERR("extroot: filesystem %s not supported by kernel\n", pr->type); 1565 return -1; 1566 } 1567 1568 if (m->overlay) 1569 path = overlay; 1570 mkdir_p(path, 0755); 1571 1572 if (check_fs) 1573 check_filesystem(pr); 1574 1575 err = mount(pr->dev, path, pr->type, m->flags, 1576 (m->options) ? (m->options) : ("")); 1577 1578 if (err) { 1579 ULOG_ERR("extroot: mounting %s (%s) on %s failed: %d (%m)\n", 1580 pr->dev, pr->type, path, errno); 1581 } else if (m->overlay) { 1582 err = check_extroot(path); 1583 if (err) 1584 umount(path); 1585 } 1586 } else { 1587 ULOG_ERR("extroot: cannot find device %s%s\n", 1588 (m->uuid ? "with UUID " : (m->label ? "with label " : "")), 1589 (m->uuid ? m->uuid : (m->label ? m->label : m->device))); 1590 } 1591 1592 return err; 1593 } 1594 1595 /** 1596 * Look for extroot config and mount it if present 1597 * 1598 * Look for /etc/config/fstab on all supported partitions and use it for 1599 * mounting extroot if specified. 1600 */ 1601 static int main_extroot(int argc, char **argv) 1602 { 1603 struct probe_info *pr; 1604 char blkdev_path[32] = { 0 }; 1605 int err = -1; 1606 #ifdef UBIFS_EXTROOT 1607 libubi_t libubi; 1608 #endif 1609 1610 if (!getenv("PREINIT")) 1611 return -1; 1612 1613 if (argc != 2) { 1614 ULOG_ERR("Usage: block extroot\n"); 1615 return -1; 1616 } 1617 1618 make_devs(); 1619 cache_load(1); 1620 1621 /* enable LOG_INFO messages */ 1622 ulog_threshold(LOG_INFO); 1623 1624 /* 1625 * Look for "rootfs_data". We will want to mount it and check for 1626 * extroot configuration. 1627 */ 1628 1629 /* Start with looking for MTD partition */ 1630 find_block_mtd("\"rootfs_data\"", blkdev_path, sizeof(blkdev_path)); 1631 if (blkdev_path[0]) { 1632 pr = find_block_info(NULL, NULL, blkdev_path); 1633 if (pr && !strcmp(pr->type, "jffs2")) { 1634 char cfg[] = "/tmp/jffs_cfg"; 1635 1636 /* 1637 * Mount MTD part and try extroot (using 1638 * /etc/config/fstab from that partition) 1639 */ 1640 mkdir_p(cfg, 0755); 1641 if (!mount(blkdev_path, cfg, "jffs2", MS_NOATIME, NULL)) { 1642 err = mount_extroot(cfg); 1643 umount2(cfg, MNT_DETACH); 1644 } 1645 if (err < 0) 1646 rmdir("/tmp/overlay"); 1647 rmdir(cfg); 1648 return err; 1649 } 1650 } 1651 1652 #ifdef UBIFS_EXTROOT 1653 /* ... but it also could be an UBI volume */ 1654 memset(blkdev_path, 0, sizeof(blkdev_path)); 1655 libubi = libubi_open(); 1656 find_block_ubi(libubi, "rootfs_data", blkdev_path, sizeof(blkdev_path)); 1657 libubi_close(libubi); 1658 if (blkdev_path[0]) { 1659 char cfg[] = "/tmp/ubifs_cfg"; 1660 1661 /* Mount volume and try extroot (using fstab from that vol) */ 1662 mkdir_p(cfg, 0755); 1663 if (!mount(blkdev_path, cfg, "ubifs", MS_NOATIME, NULL)) { 1664 err = mount_extroot(cfg); 1665 umount2(cfg, MNT_DETACH); 1666 } 1667 if (err < 0) 1668 rmdir("/tmp/overlay"); 1669 rmdir(cfg); 1670 return err; 1671 } 1672 #endif 1673 1674 /* As a last resort look for /etc/config/fstab on "rootfs" partition */ 1675 return mount_extroot(NULL); 1676 } 1677 1678 static int main_mount(int argc, char **argv) 1679 { 1680 struct probe_info *pr; 1681 1682 if (config_load(NULL)) 1683 return -1; 1684 1685 cache_load(1); 1686 list_for_each_entry(pr, &devices, list) 1687 mount_device(pr, TYPE_DEV); 1688 1689 handle_swapfiles(true); 1690 1691 return 0; 1692 } 1693 1694 static int main_umount(int argc, char **argv) 1695 { 1696 struct probe_info *pr; 1697 bool all = false; 1698 1699 if (config_load(NULL)) 1700 return -1; 1701 1702 handle_swapfiles(false); 1703 1704 cache_load(1); 1705 1706 if (argc == 3) 1707 all = !strcmp(argv[2], "-a"); 1708 1709 list_for_each_entry(pr, &devices, list) { 1710 struct mount *m; 1711 1712 if (!strcmp(pr->type, "swap")) 1713 continue; 1714 1715 m = find_block(pr->uuid, pr->label, basename(pr->dev), NULL); 1716 if (m && m->extroot) 1717 continue; 1718 1719 umount_device(pr->dev, TYPE_DEV, all); 1720 } 1721 1722 return 0; 1723 } 1724 1725 static int main_detect(int argc, char **argv) 1726 { 1727 struct probe_info *pr; 1728 1729 cache_load(0); 1730 printf("config 'global'\n"); 1731 printf("\toption\tanon_swap\t''\n"); 1732 printf("\toption\tanon_mount\t''\n"); 1733 printf("\toption\tauto_swap\t'1'\n"); 1734 printf("\toption\tauto_mount\t'1'\n"); 1735 printf("\toption\tdelay_root\t'5'\n"); 1736 printf("\toption\tcheck_fs\t''\n\n"); 1737 list_for_each_entry(pr, &devices, list) 1738 print_block_uci(pr); 1739 1740 return 0; 1741 } 1742 1743 static int main_info(int argc, char **argv) 1744 { 1745 int i; 1746 struct probe_info *pr; 1747 1748 cache_load(1); 1749 if (argc == 2) { 1750 list_for_each_entry(pr, &devices, list) 1751 print_block_info(pr); 1752 1753 return 0; 1754 }; 1755 1756 for (i = 2; i < argc; i++) { 1757 struct stat s; 1758 1759 if (stat(argv[i], &s)) { 1760 ULOG_ERR("failed to stat %s\n", argv[i]); 1761 continue; 1762 } 1763 if (!S_ISBLK(s.st_mode) && !(S_ISCHR(s.st_mode) && major(s.st_rdev) == 250)) { 1764 ULOG_ERR("%s is not a block device\n", argv[i]); 1765 continue; 1766 } 1767 pr = find_block_info(NULL, NULL, argv[i]); 1768 if (pr) 1769 print_block_info(pr); 1770 } 1771 1772 return 0; 1773 } 1774 1775 static int swapon_usage(void) 1776 { 1777 fprintf(stderr, "Usage: swapon [-s] [-a] [[-p pri] DEVICE]\n\n" 1778 "\tStart swapping on [DEVICE]\n" 1779 " -a\tStart swapping on all swap devices\n" 1780 " -p pri\tSet priority of swap device\n" 1781 " -s\tShow summary\n"); 1782 return -1; 1783 } 1784 1785 static int main_swapon(int argc, char **argv) 1786 { 1787 int ch; 1788 FILE *fp; 1789 char *lineptr; 1790 size_t s; 1791 struct probe_info *pr; 1792 int flags = 0; 1793 int pri; 1794 struct stat st; 1795 int err; 1796 1797 while ((ch = getopt(argc, argv, "ap:s")) != -1) { 1798 switch(ch) { 1799 case 's': 1800 fp = fopen("/proc/swaps", "r"); 1801 lineptr = NULL; 1802 1803 if (!fp) { 1804 ULOG_ERR("failed to open /proc/swaps\n"); 1805 return -1; 1806 } 1807 while (getline(&lineptr, &s, fp) > 0) 1808 printf("%s", lineptr); 1809 if (lineptr) 1810 free(lineptr); 1811 fclose(fp); 1812 return 0; 1813 case 'a': 1814 cache_load(0); 1815 list_for_each_entry(pr, &devices, list) { 1816 if (strcmp(pr->type, "swap")) 1817 continue; 1818 if (swapon(pr->dev, 0)) 1819 ULOG_ERR("failed to swapon %s\n", pr->dev); 1820 } 1821 return 0; 1822 case 'p': 1823 pri = atoi(optarg); 1824 if (pri >= 0) 1825 flags = ((pri << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER; 1826 break; 1827 default: 1828 return swapon_usage(); 1829 } 1830 } 1831 1832 if (optind != (argc - 1)) 1833 return swapon_usage(); 1834 1835 if (stat(argv[optind], &st) || (!S_ISBLK(st.st_mode) && !S_ISREG(st.st_mode))) { 1836 ULOG_ERR("%s is not a block device or file\n", argv[optind]); 1837 return -1; 1838 } 1839 err = swapon(argv[optind], flags); 1840 if (err) { 1841 ULOG_ERR("failed to swapon %s (%d)\n", argv[optind], err); 1842 return err; 1843 } 1844 1845 return 0; 1846 } 1847 1848 static int main_swapoff(int argc, char **argv) 1849 { 1850 if (argc != 2) { 1851 ULOG_ERR("Usage: swapoff [-a] [DEVICE]\n\n" 1852 "\tStop swapping on DEVICE\n" 1853 " -a\tStop swapping on all swap devices\n"); 1854 return -1; 1855 } 1856 1857 if (!strcmp(argv[1], "-a")) { 1858 FILE *fp = fopen("/proc/swaps", "r"); 1859 char line[256]; 1860 1861 if (!fp) { 1862 ULOG_ERR("failed to open /proc/swaps\n"); 1863 return -1; 1864 } 1865 if (fgets(line, sizeof(line), fp)) 1866 while (fgets(line, sizeof(line), fp)) { 1867 char *end = strchr(line, ' '); 1868 int err; 1869 1870 if (!end) 1871 continue; 1872 *end = '\0'; 1873 err = swapoff(line); 1874 if (err) 1875 ULOG_ERR("failed to swapoff %s (%d)\n", line, err); 1876 } 1877 fclose(fp); 1878 } else { 1879 struct stat s; 1880 int err; 1881 1882 if (stat(argv[1], &s) || (!S_ISBLK(s.st_mode) && !S_ISREG(s.st_mode))) { 1883 ULOG_ERR("%s is not a block device or file\n", argv[1]); 1884 return -1; 1885 } 1886 err = swapoff(argv[1]); 1887 if (err) { 1888 ULOG_ERR("failed to swapoff %s (%d)\n", argv[1], err); 1889 return err; 1890 } 1891 } 1892 1893 return 0; 1894 } 1895 1896 int main(int argc, char **argv) 1897 { 1898 char *base = basename(*argv); 1899 1900 umask(0); 1901 1902 ulog_open(-1, -1, "block"); 1903 ulog_threshold(LOG_NOTICE); 1904 1905 if (!strcmp(base, "swapon")) 1906 return main_swapon(argc, argv); 1907 1908 if (!strcmp(base, "swapoff")) 1909 return main_swapoff(argc, argv); 1910 1911 if ((argc > 1) && !strcmp(base, "block")) { 1912 if (!strcmp(argv[1], "info")) 1913 return main_info(argc, argv); 1914 1915 if (!strcmp(argv[1], "detect")) 1916 return main_detect(argc, argv); 1917 1918 if (!strcmp(argv[1], "hotplug")) 1919 return main_hotplug(argc, argv); 1920 1921 if (!strcmp(argv[1], "autofs")) 1922 return main_autofs(argc, argv); 1923 1924 if (!strcmp(argv[1], "extroot")) 1925 return main_extroot(argc, argv); 1926 1927 if (!strcmp(argv[1], "mount")) 1928 return main_mount(argc, argv); 1929 1930 if (!strcmp(argv[1], "umount")) 1931 return main_umount(argc, argv); 1932 1933 if (!strcmp(argv[1], "remount")) { 1934 int ret = main_umount(argc, argv); 1935 1936 if (!ret) 1937 ret = main_mount(argc, argv); 1938 return ret; 1939 } 1940 } 1941 1942 ULOG_ERR("Usage: block <info|mount|umount|detect>\n"); 1943 1944 return -1; 1945 } 1946
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