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libfstools: fit: improve fit_volume_find string handling
[project/fstools.git] / block.c
1 /*
2 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
3 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU Lesser General Public License version 2.1
7 * as published by the Free Software Foundation
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 */
14
15 #define _GNU_SOURCE
16 #include <getopt.h>
17 #include <stdio.h>
18 #include <unistd.h>
19 #include <syslog.h>
20 #include <libgen.h>
21 #include <glob.h>
22 #include <dirent.h>
23 #include <stdarg.h>
24 #include <string.h>
25 #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] >= '0' && 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'0'\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'0'\n");
1732 printf("\toption\tanon_mount\t'0'\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'0'\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 }
OpenWrt filesystem utilities