2 * Copyright (C) 2013 Felix Fietkau <nbd@openwrt.org>
3 * Copyright (C) 2013 John Crispin <blogic@openwrt.org>
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
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.
22 #include <sys/types.h>
24 #include <sys/mount.h>
29 #include <libubox/list.h>
30 #include <libubox/vlist.h>
31 #include <libubox/blobmsg_json.h>
32 #include <libubox/avl-cmp.h>
34 #include "libblkid-tiny/libblkid-tiny.h"
42 struct vlist_node node;
57 static struct vlist_tree mounts;
58 static struct blob_buf b;
59 static LIST_HEAD(devices);
60 static int anon_mount, anon_swap, auto_mount, auto_swap;
61 static unsigned int delay_root;
72 static const struct blobmsg_policy config_policy[__CFG_MAX] = {
73 [CFG_ANON_SWAP] = { .name = "anon_swap", .type = BLOBMSG_TYPE_INT32 },
74 [CFG_ANON_MOUNT] = { .name = "anon_mount", .type = BLOBMSG_TYPE_INT32 },
75 [CFG_AUTO_SWAP] = { .name = "auto_swap", .type = BLOBMSG_TYPE_INT32 },
76 [CFG_AUTO_MOUNT] = { .name = "auto_mount", .type = BLOBMSG_TYPE_INT32 },
77 [CFG_DELAY_ROOT] = { .name = "delay_root", .type = BLOBMSG_TYPE_INT32 },
90 static const struct uci_blob_param_list config_attr_list = {
91 .n_params = __CFG_MAX,
92 .params = config_policy,
95 static const struct blobmsg_policy mount_policy[__MOUNT_MAX] = {
96 [MOUNT_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING },
97 [MOUNT_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING },
98 [MOUNT_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
99 [MOUNT_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
100 [MOUNT_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_STRING },
101 [MOUNT_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
104 static const struct uci_blob_param_list mount_attr_list = {
105 .n_params = __MOUNT_MAX,
106 .params = mount_policy,
117 static const struct blobmsg_policy swap_policy[__SWAP_MAX] = {
118 [SWAP_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
119 [SWAP_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING },
120 [SWAP_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
121 [SWAP_PRIO] = { .name = "priority", .type = BLOBMSG_TYPE_INT32 },
124 static const struct uci_blob_param_list swap_attr_list = {
125 .n_params = __SWAP_MAX,
126 .params = swap_policy,
129 static char *blobmsg_get_strdup(struct blob_attr *attr)
134 return strdup(blobmsg_get_string(attr));
137 static int mount_add(struct uci_section *s)
139 struct blob_attr *tb[__MOUNT_MAX] = { 0 };
142 blob_buf_init(&b, 0);
143 uci_to_blob(&b, s, &mount_attr_list);
144 blobmsg_parse(mount_policy, __MOUNT_MAX, tb, blob_data(b.head), blob_len(b.head));
146 if (!tb[MOUNT_LABEL] && !tb[MOUNT_UUID] && !tb[MOUNT_DEVICE])
149 if (tb[MOUNT_ENABLE] && !blobmsg_get_u32(tb[MOUNT_ENABLE]))
152 m = malloc(sizeof(struct mount));
153 m->type = TYPE_MOUNT;
154 m->uuid = blobmsg_get_strdup(tb[MOUNT_UUID]);
155 m->label = blobmsg_get_strdup(tb[MOUNT_LABEL]);
156 m->target = blobmsg_get_strdup(tb[MOUNT_TARGET]);
157 m->options = blobmsg_get_strdup(tb[MOUNT_OPTIONS]);
158 m->device = blobmsg_get_strdup(tb[MOUNT_DEVICE]);
159 m->overlay = m->extroot = 0;
160 if (m->target && !strcmp(m->target, "/"))
162 if (m->target && !strcmp(m->target, "/overlay"))
163 m->extroot = m->overlay = 1;
166 vlist_add(&mounts, &m->node, m->uuid);
168 vlist_add(&mounts, &m->node, m->label);
170 vlist_add(&mounts, &m->node, m->device);
175 static int swap_add(struct uci_section *s)
177 struct blob_attr *tb[__SWAP_MAX] = { 0 };
180 blob_buf_init(&b, 0);
181 uci_to_blob(&b, s, &swap_attr_list);
182 blobmsg_parse(swap_policy, __SWAP_MAX, tb, blob_data(b.head), blob_len(b.head));
184 if (!tb[SWAP_UUID] && !tb[SWAP_DEVICE])
187 m = malloc(sizeof(struct mount));
188 memset(m, 0, sizeof(struct mount));
190 m->uuid = blobmsg_get_strdup(tb[SWAP_UUID]);
191 m->device = blobmsg_get_strdup(tb[SWAP_DEVICE]);
193 m->prio = blobmsg_get_u32(tb[SWAP_PRIO]);
195 m->prio = ((m->prio << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
197 if ((!tb[SWAP_ENABLE]) || blobmsg_get_u32(tb[SWAP_ENABLE]))
198 vlist_add(&mounts, &m->node, (m->uuid) ? (m->uuid) : (m->device));
203 static int global_add(struct uci_section *s)
205 struct blob_attr *tb[__CFG_MAX] = { 0 };
207 blob_buf_init(&b, 0);
208 uci_to_blob(&b, s, &config_attr_list);
209 blobmsg_parse(config_policy, __CFG_MAX, tb, blob_data(b.head), blob_len(b.head));
211 if ((tb[CFG_ANON_MOUNT]) && blobmsg_get_u32(tb[CFG_ANON_MOUNT]))
213 if ((tb[CFG_ANON_SWAP]) && blobmsg_get_u32(tb[CFG_ANON_SWAP]))
216 if ((tb[CFG_AUTO_MOUNT]) && blobmsg_get_u32(tb[CFG_AUTO_MOUNT]))
218 if ((tb[CFG_AUTO_SWAP]) && blobmsg_get_u32(tb[CFG_AUTO_SWAP]))
221 if (tb[CFG_DELAY_ROOT])
222 delay_root = blobmsg_get_u32(tb[CFG_DELAY_ROOT]);
227 static struct mount* find_swap(const char *uuid, const char *device)
231 vlist_for_each_element(&mounts, m, node) {
232 if (m->type != TYPE_SWAP)
234 if (uuid && m->uuid && !strcmp(m->uuid, uuid))
236 if (device && m->device && !strcmp(m->device, device))
243 static struct mount* find_block(const char *uuid, const char *label, const char *device,
248 vlist_for_each_element(&mounts, m, node) {
249 if (m->type != TYPE_MOUNT)
251 if (m->uuid && uuid && !strcmp(m->uuid, uuid))
253 if (m->label && label && !strcmp(m->label, label))
255 if (m->target && target && !strcmp(m->target, target))
257 if (m->device && device && !strcmp(m->device, device))
264 static void mounts_update(struct vlist_tree *tree, struct vlist_node *node_new,
265 struct vlist_node *node_old)
269 static int config_load(char *cfg)
271 struct uci_context *ctx;
272 struct uci_package *pkg;
273 struct uci_element *e;
275 vlist_init(&mounts, avl_strcmp, mounts_update);
277 ctx = uci_alloc_context();
280 snprintf(path, 32, "%s/etc/config", cfg);
281 uci_set_confdir(ctx, path);
284 if (uci_load(ctx, "fstab", &pkg))
287 vlist_update(&mounts);
288 uci_foreach_element(&pkg->sections, e) {
289 struct uci_section *s = uci_to_section(e);
291 if (!strcmp(s->type, "mount"))
293 if (!strcmp(s->type, "swap"))
295 if (!strcmp(s->type, "global"))
298 vlist_flush(&mounts);
303 static int _cache_load(const char *path)
305 int gl_flags = GLOB_NOESCAPE | GLOB_MARK;
309 if (glob(path, gl_flags, NULL, &gl) < 0)
312 for (j = 0; j < gl.gl_pathc; j++) {
313 struct blkid_struct_probe *pr = malloc(sizeof(struct blkid_struct_probe));
314 memset(pr, 0, sizeof(struct blkid_struct_probe));
315 probe_block(gl.gl_pathv[j], pr);
319 list_add_tail(&pr->list, &devices);
327 static void cache_load(int mtd)
330 _cache_load("/dev/mtdblock*");
331 _cache_load("/dev/mmcblk*");
332 _cache_load("/dev/sd*");
335 static int print_block_info(struct blkid_struct_probe *pr)
337 printf("%s:", pr->dev);
339 printf(" UUID=\"%s\"", pr->uuid);
342 printf(" LABEL=\"%s\"", pr->label);
345 printf(" NAME=\"%s\"", pr->name);
348 printf(" VERSION=\"%s\"", pr->version);
350 printf(" TYPE=\"%s\"\n", pr->id->name);
355 static int print_block_uci(struct blkid_struct_probe *pr)
357 if (!strcmp(pr->id->name, "swap")) {
358 printf("config 'swap'\n");
360 printf("config 'mount'\n");
361 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev));
364 printf("\toption\tuuid\t'%s'\n", pr->uuid);
366 printf("\toption\tdevice\t'%s'\n", basename(pr->dev));
367 printf("\toption\tenabled\t'0'\n\n");
372 static struct blkid_struct_probe* find_block_info(char *uuid, char *label, char *path)
374 struct blkid_struct_probe *pr = NULL;
377 list_for_each_entry(pr, &devices, list)
378 if (!strcmp(pr->uuid, uuid))
382 list_for_each_entry(pr, &devices, list)
383 if (strcmp(pr->label, label))
387 list_for_each_entry(pr, &devices, list)
388 if (!strcmp(pr->dev, path))
394 static char* find_mount_point(char *block)
396 FILE *fp = fopen("/proc/mounts", "r");
397 static char line[256];
398 int len = strlen(block);
404 while (fgets(line, sizeof(line), fp)) {
405 if (!strncmp(line, block, len)) {
406 char *p = &line[len + 1];
407 char *t = strstr(p, " ");
422 static void mkdir_p(char *dir)
424 char *l = strrchr(dir, '/');
434 static int mount_device(struct blkid_struct_probe *pr, int hotplug)
437 char *device = basename(pr->dev);
442 if (!strcmp(pr->id->name, "swap")) {
443 if (hotplug && !auto_swap)
445 m = find_swap(pr->uuid, device);
447 swapon(pr->dev, (m) ? (m->prio) : (0));
452 if (hotplug && !auto_mount)
455 if (find_mount_point(pr->dev)) {
456 fprintf(stderr, "%s is already mounted\n", pr->dev);
460 m = find_block(pr->uuid, pr->label, device, NULL);
465 char *target = m->target;
466 char _target[] = "/mnt/mmcblk123";
470 snprintf(_target, sizeof(_target), "/mnt/%s", device);
474 err = mount(pr->dev, target, pr->id->name, 0, (m->options) ? (m->options) : (""));
476 fprintf(stderr, "mounting %s (%s) as %s failed (%d) - %s\n",
477 pr->dev, pr->id->name, target, err, strerror(err));
482 char target[] = "/mnt/mmcblk123";
485 snprintf(target, sizeof(target), "/mnt/%s", device);
487 err = mount(pr->dev, target, pr->id->name, 0, "");
489 fprintf(stderr, "mounting %s (%s) as %s failed (%d) - %s\n",
490 pr->dev, pr->id->name, target, err, strerror(err));
497 static int umount_device(struct blkid_struct_probe *pr)
500 char *device = basename(pr->dev);
507 if (!strcmp(pr->id->name, "swap"))
510 mp = find_mount_point(pr->dev);
514 m = find_block(pr->uuid, pr->label, device, NULL);
518 err = umount2(mp, MNT_DETACH);
520 fprintf(stderr, "unmounting %s (%s) failed (%d) - %s\n",
521 pr->dev, mp, err, strerror(err));
523 fprintf(stderr, "unmounted %s (%s)\n",
529 static int main_hotplug(int argc, char **argv)
532 char *action, *device, *mount_point;
534 action = getenv("ACTION");
535 device = getenv("DEVNAME");
537 if (!action || !device)
539 snprintf(path, sizeof(path), "/dev/%s", device);
541 if (!strcmp(action, "remove")) {
543 mount_point = find_mount_point(path);
545 err = umount2(mount_point, MNT_DETACH);
548 fprintf(stderr, "umount of %s failed (%d) - %s\n",
549 mount_point, err, strerror(err));
552 } else if (strcmp(action, "add")) {
553 fprintf(stderr, "Unkown action %s\n", action);
558 if (config_load(NULL))
562 return mount_device(find_block_info(NULL, NULL, path), 1);
565 static int find_block_mtd(char *name, char *part, int plen)
567 FILE *fp = fopen("/proc/mtd", "r");
568 static char line[256];
574 while (!index && fgets(line, sizeof(line), fp)) {
575 if (strstr(line, name)) {
576 char *eol = strstr(line, ":");
591 snprintf(part, plen, "/dev/mtdblock%s", index);
596 static int check_extroot(char *path)
598 struct blkid_struct_probe *pr = NULL;
601 if (find_block_mtd("rootfs", fs, sizeof(fs)))
604 list_for_each_entry(pr, &devices, list) {
605 if (!strcmp(pr->dev, fs)) {
609 char uuid[32] = { 0 };
611 snprintf(tag, sizeof(tag), "%s/etc/.extroot-uuid", path);
613 fp = fopen(tag, "w+");
615 fprintf(stderr, "extroot: failed to write uuid tag file\n");
616 /* return 0 to continue boot regardless of error */
624 fp = fopen(tag, "r");
626 fprintf(stderr, "extroot: failed to open uuid tag file\n");
630 fgets(uuid, sizeof(uuid), fp);
632 if (!strcmp(uuid, pr->uuid))
634 fprintf(stderr, "extroot: uuid tag does not match rom uuid\n");
640 static int mount_extroot(char *cfg)
642 char overlay[] = "/tmp/overlay";
643 char mnt[] = "/tmp/mnt";
645 struct blkid_struct_probe *pr;
649 if (config_load(cfg))
652 m = find_block(NULL, NULL, NULL, "/");
654 m = find_block(NULL, NULL, NULL, "/overlay");
656 if (!m || !m->extroot)
659 pr = find_block_info(m->uuid, m->label, NULL);
661 if (!pr && delay_root){
662 fprintf(stderr, "extroot: is not ready yet, retrying in %ui seconds\n", delay_root);
664 pr = find_block_info(m->uuid, m->label, NULL);
667 if (strncmp(pr->id->name, "ext", 3)) {
668 fprintf(stderr, "extroot: %s is not supported, try ext4\n", pr->id->name);
675 err = mount(pr->dev, path, pr->id->name, 0, (m->options) ? (m->options) : (""));
678 fprintf(stderr, "mounting %s (%s) as %s failed (%d) - %s\n",
679 pr->dev, pr->id->name, path, err, strerror(err));
680 } else if (m->overlay) {
681 err = check_extroot(path);
690 static int main_extroot(int argc, char **argv)
692 struct blkid_struct_probe *pr;
694 char fs_data[32] = { 0 };
697 if (!getenv("PREINIT"))
701 fprintf(stderr, "Usage: block extroot mountpoint\n");
708 find_block_mtd("rootfs", fs, sizeof(fs));
712 pr = find_block_info(NULL, NULL, fs);
716 find_block_mtd("rootfs_data", fs_data, sizeof(fs_data));
718 pr = find_block_info(NULL, NULL, fs_data);
719 if (pr && !strcmp(pr->id->name, "jffs2")) {
720 char cfg[] = "/tmp/jffs_cfg";
723 if (!mount(fs_data, cfg, "jffs2", MS_NOATIME, NULL)) {
724 err = mount_extroot(cfg);
725 umount2(cfg, MNT_DETACH);
728 rmdir("/tmp/overlay");
734 return mount_extroot(NULL);
737 static int main_mount(int argc, char **argv)
739 struct blkid_struct_probe *pr;
741 if (config_load(NULL))
745 list_for_each_entry(pr, &devices, list)
751 static int main_umount(int argc, char **argv)
753 struct blkid_struct_probe *pr;
755 if (config_load(NULL))
759 list_for_each_entry(pr, &devices, list)
765 static int main_detect(int argc, char **argv)
767 struct blkid_struct_probe *pr;
770 printf("config 'global'\n");
771 printf("\toption\tanon_swap\t'0'\n");
772 printf("\toption\tanon_mount\t'0'\n");
773 printf("\toption\tauto_swap\t'1'\n");
774 printf("\toption\tauto_mount\t'1'\n\n");
775 printf("\toption\tdelay_root\t'0'\n\n");
776 list_for_each_entry(pr, &devices, list)
782 static int main_info(int argc, char **argv)
785 struct blkid_struct_probe *pr;
789 list_for_each_entry(pr, &devices, list)
790 print_block_info(pr);
795 for (i = 2; i < argc; i++) {
798 if (stat(argv[i], &s)) {
799 fprintf(stderr, "failed to stat %s\n", argv[i]);
802 if (!S_ISBLK(s.st_mode)) {
803 fprintf(stderr, "%s is not a block device\n", argv[i]);
806 pr = find_block_info(NULL, NULL, argv[i]);
808 print_block_info(pr);
814 static int main_swapon(int argc, char **argv)
817 fprintf(stderr, "Usage: swapoff [-a] [DEVICE]\n\nStop swapping on DEVICE\n\n\t-a Stop swapping on all swap devices\n");
821 if (!strcmp(argv[1], "-a")) {
822 struct blkid_struct_probe *pr;
825 list_for_each_entry(pr, &devices, list) {
826 if (strcmp(pr->id->name, "swap"))
828 if (swapon(pr->dev, 0))
829 fprintf(stderr, "failed to swapon %s\n", pr->dev);
835 if (stat(argv[1], &s) || !S_ISBLK(s.st_mode)) {
836 fprintf(stderr, "%s is not a block device\n", argv[1]);
839 err = swapon(argv[1], 0);
841 fprintf(stderr, "failed to swapon %s (%d)\n", argv[1], err);
849 static int main_swapoff(int argc, char **argv)
852 fprintf(stderr, "Usage: swapoff [-a] [DEVICE]\n\nStop swapping on DEVICE\n\n\t-a Stop swapping on all swap devices\n");
856 if (!strcmp(argv[1], "-a")) {
857 FILE *fp = fopen("/proc/swaps", "r");
861 fprintf(stderr, "failed to open /proc/swaps\n");
864 fgets(line, sizeof(line), fp);
865 while (fgets(line, sizeof(line), fp)) {
866 char *end = strchr(line, ' ');
874 fprintf(stderr, "failed to swapoff %s (%d)\n", line, err);
881 if (stat(argv[1], &s) || !S_ISBLK(s.st_mode)) {
882 fprintf(stderr, "%s is not a block device\n", argv[1]);
885 err = swapoff(argv[1]);
887 fprintf(stderr, "fsiled to swapoff %s (%d)\n", argv[1], err);
895 int main(int argc, char **argv)
897 char *base = basename(*argv);
901 if (!strcmp(base, "swapon"))
902 return main_swapon(argc, argv);
904 if (!strcmp(base, "swapoff"))
905 return main_swapoff(argc, argv);
907 if ((argc > 1) && !strcmp(base, "block")) {
908 if (!strcmp(argv[1], "info"))
909 return main_info(argc, argv);
911 if (!strcmp(argv[1], "detect"))
912 return main_detect(argc, argv);
914 if (!strcmp(argv[1], "hotplug"))
915 return main_hotplug(argc, argv);
917 if (!strcmp(argv[1], "extroot"))
918 return main_extroot(argc, argv);
920 if (!strcmp(argv[1], "mount"))
921 return main_mount(argc, argv);
923 if (!strcmp(argv[1], "umount"))
924 return main_umount(argc, argv);
927 fprintf(stderr, "Usage: block <info|mount|umount|detect>\n");