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