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