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fstools: Replace strerror(errno) with %m format.
[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/vd*");
533 _cache_load("/dev/xvd*");
534 _cache_load("/dev/mapper/*");
535 }
536
537
538 static int print_block_uci(struct probe_info *pr)
539 {
540 if (!strcmp(pr->type, "swap")) {
541 printf("config 'swap'\n");
542 } else {
543 printf("config 'mount'\n");
544 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev));
545 }
546 if (pr->uuid)
547 printf("\toption\tuuid\t'%s'\n", pr->uuid);
548 else
549 printf("\toption\tdevice\t'%s'\n", pr->dev);
550 printf("\toption\tenabled\t'0'\n\n");
551
552 return 0;
553 }
554
555 static struct probe_info* find_block_info(char *uuid, char *label, char *path)
556 {
557 struct probe_info *pr = NULL;
558
559 if (uuid)
560 list_for_each_entry(pr, &devices, list)
561 if (pr->uuid && !strcasecmp(pr->uuid, uuid))
562 return pr;
563
564 if (label)
565 list_for_each_entry(pr, &devices, list)
566 if (pr->label && !strcmp(pr->label, label))
567 return pr;
568
569 if (path)
570 list_for_each_entry(pr, &devices, list)
571 if (pr->dev && !strcmp(basename(pr->dev), basename(path)))
572 return pr;
573
574 return NULL;
575 }
576
577 static char* find_mount_point(char *block)
578 {
579 FILE *fp = fopen("/proc/self/mountinfo", "r");
580 static char line[256];
581 int len = strlen(block);
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 (!strncmp(block, devname, len)) {
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 *dosfsck = "/usr/sbin/dosfsck";
712 const char *btrfsck = "/usr/bin/btrfsck";
713 const char *ckfs;
714
715 /* UBIFS does not need stuff like fsck */
716 if (!strncmp(pr->type, "ubifs", 5))
717 return;
718
719 if (!strncmp(pr->type, "vfat", 4)) {
720 ckfs = dosfsck;
721 } else if (!strncmp(pr->type, "f2fs", 4)) {
722 ckfs = f2fsck;
723 } else if (!strncmp(pr->type, "ext", 3)) {
724 ckfs = e2fsck;
725 } else if (!strncmp(pr->type, "btrfs", 5)) {
726 ckfs = btrfsck;
727 } else {
728 ULOG_ERR("check_filesystem: %s is not supported\n", pr->type);
729 return;
730 }
731
732 if (stat(ckfs, &statbuf) < 0) {
733 ULOG_ERR("check_filesystem: %s not found\n", ckfs);
734 return;
735 }
736
737 pid = fork();
738 if (!pid) {
739 if(!strncmp(pr->type, "f2fs", 4)) {
740 execl(ckfs, ckfs, "-f", pr->dev, NULL);
741 exit(-1);
742 } else if(!strncmp(pr->type, "btrfs", 5)) {
743 execl(ckfs, ckfs, "--repair", pr->dev, NULL);
744 exit(-1);
745 } else {
746 execl(ckfs, ckfs, "-p", pr->dev, NULL);
747 exit(-1);
748 }
749 } else if (pid > 0) {
750 int status;
751
752 waitpid(pid, &status, 0);
753 if (WEXITSTATUS(status))
754 ULOG_ERR("check_filesystem: %s returned %d\n", ckfs, WEXITSTATUS(status));
755 }
756 }
757
758 static void handle_swapfiles(bool on)
759 {
760 struct stat s;
761 struct mount *m;
762 struct probe_info *pr;
763
764 vlist_for_each_element(&mounts, m, node)
765 {
766 if (m->type != TYPE_SWAP || !m->target)
767 continue;
768
769 if (stat(m->target, &s) || !S_ISREG(s.st_mode))
770 continue;
771
772 pr = _probe_path(m->target);
773
774 if (!pr)
775 continue;
776
777 if (!strcmp(pr->type, "swap")) {
778 if (on)
779 swapon(pr->dev, m->prio);
780 else
781 swapoff(pr->dev);
782 }
783
784 free(pr);
785 }
786 }
787
788 static void to_devnull(int fd)
789 {
790 int devnull = open("/dev/null", fd ? O_WRONLY : O_RDONLY);
791
792 if (devnull >= 0)
793 dup2(devnull, fd);
794
795 if (devnull > STDERR_FILENO)
796 close(devnull);
797 }
798
799 static int exec_mount(const char *source, const char *target,
800 const char *fstype, const char *options)
801 {
802 pid_t pid;
803 struct stat s;
804 FILE *mount_fd;
805 int err, status, pfds[2];
806 char errmsg[128], cmd[sizeof("/sbin/mount.XXXXXXXXXXXXXXXX\0")];
807
808 snprintf(cmd, sizeof(cmd), "/sbin/mount.%s", fstype);
809
810 if (stat(cmd, &s) < 0 || !S_ISREG(s.st_mode) || !(s.st_mode & S_IXUSR)) {
811 ULOG_ERR("No \"mount.%s\" utility available\n", fstype);
812 return -1;
813 }
814
815 if (pipe(pfds) < 0)
816 return -1;
817
818 fcntl(pfds[0], F_SETFD, fcntl(pfds[0], F_GETFD) | FD_CLOEXEC);
819 fcntl(pfds[1], F_SETFD, fcntl(pfds[1], F_GETFD) | FD_CLOEXEC);
820
821 pid = vfork();
822
823 switch (pid) {
824 case -1:
825 close(pfds[0]);
826 close(pfds[1]);
827
828 return -1;
829
830 case 0:
831 to_devnull(STDIN_FILENO);
832 to_devnull(STDOUT_FILENO);
833
834 dup2(pfds[1], STDERR_FILENO);
835 close(pfds[0]);
836 close(pfds[1]);
837
838 if (options && *options)
839 execl(cmd, cmd, "-o", options, source, target, NULL);
840 else
841 execl(cmd, cmd, source, target, NULL);
842
843 return -1;
844
845 default:
846 close(pfds[1]);
847
848 mount_fd = fdopen(pfds[0], "r");
849
850 while (fgets(errmsg, sizeof(errmsg), mount_fd))
851 ULOG_ERR("mount.%s: %s", fstype, errmsg);
852
853 fclose(mount_fd);
854
855 err = waitpid(pid, &status, 0);
856
857 if (err != -1) {
858 if (status != 0) {
859 ULOG_ERR("mount.%s: failed with status %d\n", fstype, status);
860 errno = EINVAL;
861 err = -1;
862 } else {
863 errno = 0;
864 err = 0;
865 }
866 }
867
868 break;
869 }
870
871 return err;
872 }
873
874 static int handle_mount(const char *source, const char *target,
875 const char *fstype, struct mount *m)
876 {
877 int i, err;
878 size_t mount_opts_len;
879 char *mount_opts = NULL, *ptr;
880
881 err = mount(source, target, fstype, m ? m->flags : 0,
882 (m && m->options) ? m->options : "");
883
884 /* Requested file system type is not available in kernel,
885 attempt to call mount helper. */
886 if (err == -1 && errno == ENODEV) {
887 if (m) {
888 /* Convert mount flags back into string representation,
889 first calculate needed length of string buffer... */
890 mount_opts_len = 1 + (m->options ? strlen(m->options) : 0);
891
892 for (i = 0; i < ARRAY_SIZE(mount_flags); i++)
893 if ((mount_flags[i].flag > 0) &&
894 (mount_flags[i].flag < INT_MAX) &&
895 (m->flags & (uint32_t)mount_flags[i].flag))
896 mount_opts_len += strlen(mount_flags[i].name) + 1;
897
898 /* ... then now allocate and fill it ... */
899 ptr = mount_opts = calloc(1, mount_opts_len);
900
901 if (!ptr) {
902 errno = ENOMEM;
903 return -1;
904 }
905
906 if (m->options)
907 ptr += sprintf(ptr, "%s,", m->options);
908
909 for (i = 0; i < ARRAY_SIZE(mount_flags); i++)
910 if ((mount_flags[i].flag > 0) &&
911 (mount_flags[i].flag < INT_MAX) &&
912 (m->flags & (uint32_t)mount_flags[i].flag))
913 ptr += sprintf(ptr, "%s,", mount_flags[i].name);
914
915 mount_opts[mount_opts_len - 1] = 0;
916 }
917
918 /* ... and now finally invoke the external mount program */
919 err = exec_mount(source, target, fstype, mount_opts);
920 }
921
922 return err;
923 }
924
925 static void blockd_notify(char *device, struct mount *m, struct probe_info *pr)
926 {
927 struct ubus_context *ctx = ubus_connect(NULL);
928 uint32_t id;
929
930 if (!ctx)
931 return;
932
933 if (!ubus_lookup_id(ctx, "block", &id)) {
934 struct blob_buf buf = { 0 };
935 char *d = strrchr(device, '/');
936
937 if (d)
938 d++;
939 else
940 d = device;
941
942 blob_buf_init(&buf, 0);
943
944 if (m) {
945
946 blobmsg_add_string(&buf, "device", d);
947 if (m->uuid)
948 blobmsg_add_string(&buf, "uuid", m->uuid);
949 if (m->label)
950 blobmsg_add_string(&buf, "label", m->label);
951 if (m->target)
952 blobmsg_add_string(&buf, "target", m->target);
953 if (m->options)
954 blobmsg_add_string(&buf, "options", m->options);
955 if (m->autofs)
956 blobmsg_add_u32(&buf, "autofs", m->autofs);
957 if (pr->type)
958 blobmsg_add_string(&buf, "type", pr->type);
959 if (pr->version)
960 blobmsg_add_string(&buf, "version", pr->version);
961 } else if (pr) {
962 blobmsg_add_string(&buf, "device", d);
963 if (pr->uuid)
964 blobmsg_add_string(&buf, "uuid", pr->uuid);
965 if (pr->label)
966 blobmsg_add_string(&buf, "label", pr->label);
967 if (pr->type)
968 blobmsg_add_string(&buf, "type", pr->type);
969 if (pr->version)
970 blobmsg_add_string(&buf, "version", pr->version);
971 blobmsg_add_u32(&buf, "anon", 1);
972 } else {
973 blobmsg_add_string(&buf, "device", d);
974 blobmsg_add_u32(&buf, "remove", 1);
975 }
976
977 ubus_invoke(ctx, id, "hotplug", buf.head, NULL, NULL, 3000);
978 }
979
980 ubus_free(ctx);
981 }
982
983 static int mount_device(struct probe_info *pr, int type)
984 {
985 struct mount *m;
986 char *device;
987 char *mp;
988
989 if (!pr)
990 return -1;
991
992 device = basename(pr->dev);
993
994 if (!strcmp(pr->type, "swap")) {
995 if ((type == TYPE_HOTPLUG) && !auto_swap)
996 return -1;
997 m = find_swap(pr->uuid, pr->label, device);
998 if (m || anon_swap)
999 swapon(pr->dev, (m) ? (m->prio) : (0));
1000
1001 return 0;
1002 }
1003
1004 mp = find_mount_point(pr->dev);
1005 if (mp && (type != TYPE_HOTPLUG)) {
1006 ULOG_ERR("%s is already mounted on %s\n", pr->dev, mp);
1007 free(mp);
1008 return -1;
1009 }
1010
1011 m = find_block(pr->uuid, pr->label, device, NULL);
1012 if (m && m->extroot)
1013 return -1;
1014
1015 if (m) switch (type) {
1016 case TYPE_HOTPLUG:
1017 blockd_notify(device, m, pr);
1018 if (m->autofs)
1019 return 0;
1020 if (!auto_mount)
1021 return -1;
1022 break;
1023 case TYPE_AUTOFS:
1024 if (!m->autofs)
1025 return -1;
1026 break;
1027 case TYPE_DEV:
1028 if (m->autofs)
1029 return -1;
1030 break;
1031 } else if (type == TYPE_HOTPLUG) {
1032 blockd_notify(device, NULL, pr);
1033 }
1034
1035 if (m) {
1036 char *target = m->target;
1037 char _target[32];
1038 int err = 0;
1039
1040 if (m->autofs) {
1041 snprintf(_target, sizeof(_target), "/tmp/run/blockd/%s", device);
1042 target = _target;
1043 }
1044 if (!target) {
1045 snprintf(_target, sizeof(_target), "/mnt/%s", device);
1046 target = _target;
1047 }
1048 mkdir_p(target);
1049
1050 if (check_fs)
1051 check_filesystem(pr);
1052
1053 err = handle_mount(pr->dev, target, pr->type, m);
1054 if (err)
1055 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %m\n",
1056 pr->dev, pr->type, target, errno);
1057 else
1058 handle_swapfiles(true);
1059 return err;
1060 }
1061
1062 if (anon_mount) {
1063 char target[32];
1064 int err = 0;
1065
1066 snprintf(target, sizeof(target), "/mnt/%s", device);
1067 mkdir_p(target);
1068
1069 if (check_fs)
1070 check_filesystem(pr);
1071
1072 err = handle_mount(pr->dev, target, pr->type, NULL);
1073 if (err)
1074 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %m\n",
1075 pr->dev, pr->type, target, errno);
1076 else
1077 handle_swapfiles(true);
1078 return err;
1079 }
1080
1081 return 0;
1082 }
1083
1084 static int umount_device(struct probe_info *pr)
1085 {
1086 struct mount *m;
1087 char *device = basename(pr->dev);
1088 char *mp;
1089 int err;
1090
1091 if (!pr)
1092 return -1;
1093
1094 if (!strcmp(pr->type, "swap"))
1095 return -1;
1096
1097 mp = find_mount_point(pr->dev);
1098 if (!mp)
1099 return -1;
1100
1101 m = find_block(pr->uuid, pr->label, device, NULL);
1102 if (m && m->extroot)
1103 return -1;
1104
1105 err = umount2(mp, MNT_DETACH);
1106 if (err)
1107 ULOG_ERR("unmounting %s (%s) failed (%d) - %m\n",
1108 pr->dev, mp, errno);
1109 else
1110 ULOG_INFO("unmounted %s (%s)\n",
1111 pr->dev, mp);
1112
1113 free(mp);
1114 return err;
1115 }
1116
1117 static int mount_action(char *action, char *device, int type)
1118 {
1119 char path[32];
1120 char *mount_point;
1121
1122 if (!action || !device)
1123 return -1;
1124 snprintf(path, sizeof(path), "/dev/%s", device);
1125
1126 if (!strcmp(action, "remove")) {
1127 int err = 0;
1128
1129 if (type == TYPE_HOTPLUG)
1130 blockd_notify(device, NULL, NULL);
1131
1132 mount_point = find_mount_point(path);
1133 if (mount_point)
1134 err = umount2(mount_point, MNT_DETACH);
1135
1136 if (err)
1137 ULOG_ERR("umount of %s failed (%d) - %m\n",
1138 mount_point, errno);
1139
1140 free(mount_point);
1141 return 0;
1142 } else if (strcmp(action, "add")) {
1143 ULOG_ERR("Unkown action %s\n", action);
1144
1145 return -1;
1146 }
1147
1148 if (config_load(NULL))
1149 return -1;
1150 cache_load(0);
1151
1152 return mount_device(find_block_info(NULL, NULL, path), type);
1153 }
1154
1155 static int main_hotplug(int argc, char **argv)
1156 {
1157 return mount_action(getenv("ACTION"), getenv("DEVNAME"), TYPE_HOTPLUG);
1158 }
1159
1160 static int main_autofs(int argc, char **argv)
1161 {
1162 if (argc < 3)
1163 return -1;
1164
1165 if (!strcmp(argv[2], "start")) {
1166 struct probe_info *pr;
1167
1168 if (config_load(NULL))
1169 return -1;
1170
1171 cache_load(0);
1172 list_for_each_entry(pr, &devices, list) {
1173 struct mount *m = find_block(pr->uuid, pr->label, NULL, NULL);
1174
1175 if (m && m->autofs)
1176 mount_device(pr, TYPE_HOTPLUG);
1177 else
1178 blockd_notify(pr->dev, m, pr);
1179 }
1180 return 0;
1181 }
1182 return mount_action(argv[2], argv[3], TYPE_AUTOFS);
1183 }
1184
1185 static int find_block_mtd(char *name, char *part, int plen)
1186 {
1187 FILE *fp = fopen("/proc/mtd", "r");
1188 static char line[256];
1189 char *index = NULL;
1190
1191 if(!fp)
1192 return -1;
1193
1194 while (!index && fgets(line, sizeof(line), fp)) {
1195 if (strstr(line, name)) {
1196 char *eol = strstr(line, ":");
1197
1198 if (!eol)
1199 continue;
1200
1201 *eol = '\0';
1202 index = &line[3];
1203 }
1204 }
1205
1206 fclose(fp);
1207
1208 if (!index)
1209 return -1;
1210
1211 snprintf(part, plen, "/dev/mtdblock%s", index);
1212
1213 return 0;
1214 }
1215
1216 #ifdef UBIFS_EXTROOT
1217 static int find_ubi_vol(libubi_t libubi, char *name, int *dev_num, int *vol_id)
1218 {
1219 int dev = 0;
1220
1221 while (ubi_dev_present(libubi, dev))
1222 {
1223 struct ubi_dev_info dev_info;
1224 struct ubi_vol_info vol_info;
1225
1226 if (ubi_get_dev_info1(libubi, dev++, &dev_info))
1227 continue;
1228 if (ubi_get_vol_info1_nm(libubi, dev_info.dev_num, name, &vol_info))
1229 continue;
1230
1231 *dev_num = dev_info.dev_num;
1232 *vol_id = vol_info.vol_id;
1233
1234 return 0;
1235 }
1236
1237 return -1;
1238 }
1239
1240 static int find_block_ubi(libubi_t libubi, char *name, char *part, int plen)
1241 {
1242 int dev_num;
1243 int vol_id;
1244 int err = -1;
1245
1246 err = find_ubi_vol(libubi, name, &dev_num, &vol_id);
1247 if (!err)
1248 snprintf(part, plen, "/dev/ubi%d_%d", dev_num, vol_id);
1249
1250 return err;
1251 }
1252
1253 static int find_block_ubi_RO(libubi_t libubi, char *name, char *part, int plen)
1254 {
1255 int dev_num;
1256 int vol_id;
1257 int err = -1;
1258
1259 err = find_ubi_vol(libubi, name, &dev_num, &vol_id);
1260 if (!err)
1261 snprintf(part, plen, "/dev/ubiblock%d_%d", dev_num, vol_id);
1262
1263 return err;
1264 }
1265
1266 #else
1267
1268 static int find_root_dev(char *buf, int len)
1269 {
1270 DIR *d;
1271 dev_t root;
1272 struct stat s;
1273 struct dirent *e;
1274
1275 if (stat("/", &s))
1276 return -1;
1277
1278 if (!(d = opendir("/dev")))
1279 return -1;
1280
1281 root = s.st_dev;
1282
1283 while ((e = readdir(d)) != NULL) {
1284 snprintf(buf, len, "/dev/%s", e->d_name);
1285
1286 if (stat(buf, &s) || s.st_rdev != root)
1287 continue;
1288
1289 closedir(d);
1290 return 0;
1291 }
1292
1293 closedir(d);
1294 return -1;
1295 }
1296
1297 #endif
1298
1299 static int test_fs_support(const char *name)
1300 {
1301 char line[128], *p;
1302 int rv = -1;
1303 FILE *f;
1304
1305 if ((f = fopen("/proc/filesystems", "r")) != NULL) {
1306 while (fgets(line, sizeof(line), f)) {
1307 p = strtok(line, "\t\n");
1308
1309 if (p && !strcmp(p, "nodev"))
1310 p = strtok(NULL, "\t\n");
1311
1312 if (p && !strcmp(p, name)) {
1313 rv = 0;
1314 break;
1315 }
1316 }
1317 fclose(f);
1318 }
1319
1320 return rv;
1321 }
1322
1323 static int check_extroot(char *path)
1324 {
1325 struct probe_info *pr = NULL;
1326 char devpath[32];
1327
1328 #ifdef UBIFS_EXTROOT
1329 if (find_block_mtd("\"rootfs\"", devpath, sizeof(devpath))) {
1330 int err = -1;
1331 libubi_t libubi;
1332
1333 libubi = libubi_open();
1334 err = find_block_ubi_RO(libubi, "rootfs", devpath, sizeof(devpath));
1335 libubi_close(libubi);
1336 if (err)
1337 return -1;
1338 }
1339 #else
1340 if (find_block_mtd("\"rootfs\"", devpath, sizeof(devpath))) {
1341 if (find_root_dev(devpath, sizeof(devpath))) {
1342 ULOG_ERR("extroot: unable to determine root device\n");
1343 return -1;
1344 }
1345 }
1346 #endif
1347
1348 list_for_each_entry(pr, &devices, list) {
1349 if (!strcmp(pr->dev, devpath)) {
1350 struct stat s;
1351 FILE *fp = NULL;
1352 char tag[64];
1353 char uuid[64] = { 0 };
1354
1355 snprintf(tag, sizeof(tag), "%s/etc", path);
1356 if (stat(tag, &s))
1357 mkdir_p(tag);
1358
1359 snprintf(tag, sizeof(tag), "%s/etc/.extroot-uuid", path);
1360 if (stat(tag, &s)) {
1361 fp = fopen(tag, "w+");
1362 if (!fp) {
1363 ULOG_ERR("extroot: failed to write UUID to %s: %d (%m)\n",
1364 tag, errno);
1365 /* return 0 to continue boot regardless of error */
1366 return 0;
1367 }
1368 fputs(pr->uuid, fp);
1369 fclose(fp);
1370 return 0;
1371 }
1372
1373 fp = fopen(tag, "r");
1374 if (!fp) {
1375 ULOG_ERR("extroot: failed to read UUID from %s: %d (%m)\n",
1376 tag, errno);
1377 return -1;
1378 }
1379
1380 if (!fgets(uuid, sizeof(uuid), fp))
1381 ULOG_ERR("extroot: failed to read UUID from %s: %d (%m)\n",
1382 tag, errno);
1383 fclose(fp);
1384
1385 if (*uuid && !strcasecmp(uuid, pr->uuid))
1386 return 0;
1387
1388 ULOG_ERR("extroot: UUID mismatch (root: %s, %s: %s)\n",
1389 pr->uuid, basename(path), uuid);
1390 return -1;
1391 }
1392 }
1393
1394 ULOG_ERR("extroot: unable to lookup root device %s\n", devpath);
1395 return -1;
1396 }
1397
1398 /*
1399 * Read info about extroot from UCI (using prefix) and mount it.
1400 */
1401 static int mount_extroot(char *cfg)
1402 {
1403 char overlay[] = "/tmp/extroot/overlay";
1404 char mnt[] = "/tmp/extroot/mnt";
1405 char *path = mnt;
1406 struct probe_info *pr;
1407 struct mount *m;
1408 int err = -1;
1409
1410 /* Load @cfg/etc/config/fstab */
1411 if (config_load(cfg))
1412 return -2;
1413
1414 /* See if there is extroot-specific mount config */
1415 m = find_block(NULL, NULL, NULL, "/");
1416 if (!m)
1417 m = find_block(NULL, NULL, NULL, "/overlay");
1418
1419 if (!m || !m->extroot)
1420 {
1421 ULOG_INFO("extroot: not configured\n");
1422 return -1;
1423 }
1424
1425 /* Find block device pointed by the mount config */
1426 pr = find_block_info(m->uuid, m->label, m->device);
1427
1428 if (!pr && delay_root){
1429 ULOG_INFO("extroot: device not present, retrying in %u seconds\n", delay_root);
1430 sleep(delay_root);
1431 make_devs();
1432 cache_load(0);
1433 pr = find_block_info(m->uuid, m->label, m->device);
1434 }
1435 if (pr) {
1436 if (strncmp(pr->type, "ext", 3) &&
1437 strncmp(pr->type, "f2fs", 4) &&
1438 strncmp(pr->type, "btrfs", 5) &&
1439 strncmp(pr->type, "ubifs", 5)) {
1440 ULOG_ERR("extroot: unsupported filesystem %s, try ext4, f2fs, btrfs or ubifs\n", pr->type);
1441 return -1;
1442 }
1443
1444 if (test_fs_support(pr->type)) {
1445 ULOG_ERR("extroot: filesystem %s not supported by kernel\n", pr->type);
1446 return -1;
1447 }
1448
1449 if (m->overlay)
1450 path = overlay;
1451 mkdir_p(path);
1452
1453 if (check_fs)
1454 check_filesystem(pr);
1455
1456 err = mount(pr->dev, path, pr->type, m->flags,
1457 (m->options) ? (m->options) : (""));
1458
1459 if (err) {
1460 ULOG_ERR("extroot: mounting %s (%s) on %s failed: %d (%m)\n",
1461 pr->dev, pr->type, path, errno);
1462 } else if (m->overlay) {
1463 err = check_extroot(path);
1464 if (err)
1465 umount(path);
1466 }
1467 } else {
1468 ULOG_ERR("extroot: cannot find device %s%s\n",
1469 (m->uuid ? "with UUID " : (m->label ? "with label " : "")),
1470 (m->uuid ? m->uuid : (m->label ? m->label : m->device)));
1471 }
1472
1473 return err;
1474 }
1475
1476 static int main_extroot(int argc, char **argv)
1477 {
1478 struct probe_info *pr;
1479 char blkdev_path[32] = { 0 };
1480 int err = -1;
1481 #ifdef UBIFS_EXTROOT
1482 libubi_t libubi;
1483 #endif
1484
1485 if (!getenv("PREINIT"))
1486 return -1;
1487
1488 if (argc != 2) {
1489 ULOG_ERR("Usage: block extroot\n");
1490 return -1;
1491 }
1492
1493 make_devs();
1494 cache_load(1);
1495
1496 /* enable LOG_INFO messages */
1497 ulog_threshold(LOG_INFO);
1498
1499 /*
1500 * Look for "rootfs_data". We will want to mount it and check for
1501 * extroot configuration.
1502 */
1503
1504 /* Start with looking for MTD partition */
1505 find_block_mtd("\"rootfs_data\"", blkdev_path, sizeof(blkdev_path));
1506 if (blkdev_path[0]) {
1507 pr = find_block_info(NULL, NULL, blkdev_path);
1508 if (pr && !strcmp(pr->type, "jffs2")) {
1509 char cfg[] = "/tmp/jffs_cfg";
1510
1511 /*
1512 * Mount MTD part and try extroot (using
1513 * /etc/config/fstab from that partition)
1514 */
1515 mkdir_p(cfg);
1516 if (!mount(blkdev_path, cfg, "jffs2", MS_NOATIME, NULL)) {
1517 err = mount_extroot(cfg);
1518 umount2(cfg, MNT_DETACH);
1519 }
1520 if (err < 0)
1521 rmdir("/tmp/overlay");
1522 rmdir(cfg);
1523 return err;
1524 }
1525 }
1526
1527 #ifdef UBIFS_EXTROOT
1528 /* ... but it also could be an UBI volume */
1529 memset(blkdev_path, 0, sizeof(blkdev_path));
1530 libubi = libubi_open();
1531 find_block_ubi(libubi, "rootfs_data", blkdev_path, sizeof(blkdev_path));
1532 libubi_close(libubi);
1533 if (blkdev_path[0]) {
1534 char cfg[] = "/tmp/ubifs_cfg";
1535
1536 /* Mount volume and try extroot (using fstab from that vol) */
1537 mkdir_p(cfg);
1538 if (!mount(blkdev_path, cfg, "ubifs", MS_NOATIME, NULL)) {
1539 err = mount_extroot(cfg);
1540 umount2(cfg, MNT_DETACH);
1541 }
1542 if (err < 0)
1543 rmdir("/tmp/overlay");
1544 rmdir(cfg);
1545 return err;
1546 }
1547 #endif
1548
1549 return mount_extroot(NULL);
1550 }
1551
1552 static int main_mount(int argc, char **argv)
1553 {
1554 struct probe_info *pr;
1555
1556 if (config_load(NULL))
1557 return -1;
1558
1559 cache_load(1);
1560 list_for_each_entry(pr, &devices, list)
1561 mount_device(pr, TYPE_DEV);
1562
1563 handle_swapfiles(true);
1564
1565 return 0;
1566 }
1567
1568 static int main_umount(int argc, char **argv)
1569 {
1570 struct probe_info *pr;
1571
1572 if (config_load(NULL))
1573 return -1;
1574
1575 handle_swapfiles(false);
1576
1577 cache_load(0);
1578 list_for_each_entry(pr, &devices, list)
1579 umount_device(pr);
1580
1581 return 0;
1582 }
1583
1584 static int main_detect(int argc, char **argv)
1585 {
1586 struct probe_info *pr;
1587
1588 cache_load(0);
1589 printf("config 'global'\n");
1590 printf("\toption\tanon_swap\t'0'\n");
1591 printf("\toption\tanon_mount\t'0'\n");
1592 printf("\toption\tauto_swap\t'1'\n");
1593 printf("\toption\tauto_mount\t'1'\n");
1594 printf("\toption\tdelay_root\t'5'\n");
1595 printf("\toption\tcheck_fs\t'0'\n\n");
1596 list_for_each_entry(pr, &devices, list)
1597 print_block_uci(pr);
1598
1599 return 0;
1600 }
1601
1602 static int main_info(int argc, char **argv)
1603 {
1604 int i;
1605 struct probe_info *pr;
1606
1607 cache_load(1);
1608 if (argc == 2) {
1609 list_for_each_entry(pr, &devices, list)
1610 print_block_info(pr);
1611
1612 return 0;
1613 };
1614
1615 for (i = 2; i < argc; i++) {
1616 struct stat s;
1617
1618 if (stat(argv[i], &s)) {
1619 ULOG_ERR("failed to stat %s\n", argv[i]);
1620 continue;
1621 }
1622 if (!S_ISBLK(s.st_mode) && !(S_ISCHR(s.st_mode) && major(s.st_rdev) == 250)) {
1623 ULOG_ERR("%s is not a block device\n", argv[i]);
1624 continue;
1625 }
1626 pr = find_block_info(NULL, NULL, argv[i]);
1627 if (pr)
1628 print_block_info(pr);
1629 }
1630
1631 return 0;
1632 }
1633
1634 static int swapon_usage(void)
1635 {
1636 fprintf(stderr, "Usage: swapon [-s] [-a] [[-p pri] DEVICE]\n\n"
1637 "\tStart swapping on [DEVICE]\n"
1638 " -a\tStart swapping on all swap devices\n"
1639 " -p pri\tSet priority of swap device\n"
1640 " -s\tShow summary\n");
1641 return -1;
1642 }
1643
1644 static int main_swapon(int argc, char **argv)
1645 {
1646 int ch;
1647 FILE *fp;
1648 char *lineptr;
1649 size_t s;
1650 struct probe_info *pr;
1651 int flags = 0;
1652 int pri;
1653 struct stat st;
1654 int err;
1655
1656 while ((ch = getopt(argc, argv, "ap:s")) != -1) {
1657 switch(ch) {
1658 case 's':
1659 fp = fopen("/proc/swaps", "r");
1660 lineptr = NULL;
1661
1662 if (!fp) {
1663 ULOG_ERR("failed to open /proc/swaps\n");
1664 return -1;
1665 }
1666 while (getline(&lineptr, &s, fp) > 0)
1667 printf("%s", lineptr);
1668 if (lineptr)
1669 free(lineptr);
1670 fclose(fp);
1671 return 0;
1672 case 'a':
1673 cache_load(0);
1674 list_for_each_entry(pr, &devices, list) {
1675 if (strcmp(pr->type, "swap"))
1676 continue;
1677 if (swapon(pr->dev, 0))
1678 ULOG_ERR("failed to swapon %s\n", pr->dev);
1679 }
1680 return 0;
1681 case 'p':
1682 pri = atoi(optarg);
1683 if (pri >= 0)
1684 flags = ((pri << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
1685 break;
1686 default:
1687 return swapon_usage();
1688 }
1689
1690 }
1691
1692 if (optind != (argc - 1))
1693 return swapon_usage();
1694
1695 if (stat(argv[optind], &st) || (!S_ISBLK(st.st_mode) && !S_ISREG(st.st_mode))) {
1696 ULOG_ERR("%s is not a block device or file\n", argv[optind]);
1697 return -1;
1698 }
1699 err = swapon(argv[optind], flags);
1700 if (err) {
1701 ULOG_ERR("failed to swapon %s (%d)\n", argv[optind], err);
1702 return err;
1703 }
1704
1705 return 0;
1706 }
1707
1708 static int main_swapoff(int argc, char **argv)
1709 {
1710 if (argc != 2) {
1711 ULOG_ERR("Usage: swapoff [-a] [DEVICE]\n\n"
1712 "\tStop swapping on DEVICE\n"
1713 " -a\tStop swapping on all swap devices\n");
1714 return -1;
1715 }
1716
1717 if (!strcmp(argv[1], "-a")) {
1718 FILE *fp = fopen("/proc/swaps", "r");
1719 char line[256];
1720
1721 if (!fp) {
1722 ULOG_ERR("failed to open /proc/swaps\n");
1723 return -1;
1724 }
1725 if (fgets(line, sizeof(line), fp))
1726 while (fgets(line, sizeof(line), fp)) {
1727 char *end = strchr(line, ' ');
1728 int err;
1729
1730 if (!end)
1731 continue;
1732 *end = '\0';
1733 err = swapoff(line);
1734 if (err)
1735 ULOG_ERR("failed to swapoff %s (%d)\n", line, err);
1736 }
1737 fclose(fp);
1738 } else {
1739 struct stat s;
1740 int err;
1741
1742 if (stat(argv[1], &s) || (!S_ISBLK(s.st_mode) && !S_ISREG(s.st_mode))) {
1743 ULOG_ERR("%s is not a block device or file\n", argv[1]);
1744 return -1;
1745 }
1746 err = swapoff(argv[1]);
1747 if (err) {
1748 ULOG_ERR("failed to swapoff %s (%d)\n", argv[1], err);
1749 return err;
1750 }
1751 }
1752
1753 return 0;
1754 }
1755
1756 int main(int argc, char **argv)
1757 {
1758 char *base = basename(*argv);
1759
1760 umask(0);
1761
1762 ulog_open(-1, -1, "block");
1763 ulog_threshold(LOG_NOTICE);
1764
1765 if (!strcmp(base, "swapon"))
1766 return main_swapon(argc, argv);
1767
1768 if (!strcmp(base, "swapoff"))
1769 return main_swapoff(argc, argv);
1770
1771 if ((argc > 1) && !strcmp(base, "block")) {
1772 if (!strcmp(argv[1], "info"))
1773 return main_info(argc, argv);
1774
1775 if (!strcmp(argv[1], "detect"))
1776 return main_detect(argc, argv);
1777
1778 if (!strcmp(argv[1], "hotplug"))
1779 return main_hotplug(argc, argv);
1780
1781 if (!strcmp(argv[1], "autofs"))
1782 return main_autofs(argc, argv);
1783
1784 if (!strcmp(argv[1], "extroot"))
1785 return main_extroot(argc, argv);
1786
1787 if (!strcmp(argv[1], "mount"))
1788 return main_mount(argc, argv);
1789
1790 if (!strcmp(argv[1], "umount"))
1791 return main_umount(argc, argv);
1792
1793 if (!strcmp(argv[1], "remount")) {
1794 int ret = main_umount(argc, argv);
1795
1796 if (!ret)
1797 ret = main_mount(argc, argv);
1798 return ret;
1799 }
1800 }
1801
1802 ULOG_ERR("Usage: block <info|mount|umount|detect>\n");
1803
1804 return -1;
1805 }
OpenWrt filesystem utilities