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>
30 #include <libubox/list.h>
31 #include <libubox/vlist.h>
32 #include <libubox/blobmsg_json.h>
33 #include <libubox/avl-cmp.h>
35 #include "libblkid-tiny/libblkid-tiny.h"
43 struct vlist_node node;
58 static struct vlist_tree mounts;
59 static struct blob_buf b;
60 static LIST_HEAD(devices);
61 static int anon_mount, anon_swap, auto_mount, auto_swap, check_fs;
62 static unsigned int delay_root;
74 static const struct blobmsg_policy config_policy[__CFG_MAX] = {
75 [CFG_ANON_SWAP] = { .name = "anon_swap", .type = BLOBMSG_TYPE_INT32 },
76 [CFG_ANON_MOUNT] = { .name = "anon_mount", .type = BLOBMSG_TYPE_INT32 },
77 [CFG_AUTO_SWAP] = { .name = "auto_swap", .type = BLOBMSG_TYPE_INT32 },
78 [CFG_AUTO_MOUNT] = { .name = "auto_mount", .type = BLOBMSG_TYPE_INT32 },
79 [CFG_DELAY_ROOT] = { .name = "delay_root", .type = BLOBMSG_TYPE_INT32 },
80 [CFG_CHECK_FS] = { .name = "check_fs", .type = BLOBMSG_TYPE_INT32 },
93 static const struct uci_blob_param_list config_attr_list = {
94 .n_params = __CFG_MAX,
95 .params = config_policy,
98 static const struct blobmsg_policy mount_policy[__MOUNT_MAX] = {
99 [MOUNT_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING },
100 [MOUNT_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING },
101 [MOUNT_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
102 [MOUNT_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
103 [MOUNT_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_STRING },
104 [MOUNT_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
107 static const struct uci_blob_param_list mount_attr_list = {
108 .n_params = __MOUNT_MAX,
109 .params = mount_policy,
120 static const struct blobmsg_policy swap_policy[__SWAP_MAX] = {
121 [SWAP_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
122 [SWAP_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING },
123 [SWAP_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
124 [SWAP_PRIO] = { .name = "priority", .type = BLOBMSG_TYPE_INT32 },
127 static const struct uci_blob_param_list swap_attr_list = {
128 .n_params = __SWAP_MAX,
129 .params = swap_policy,
132 static char *blobmsg_get_strdup(struct blob_attr *attr)
137 return strdup(blobmsg_get_string(attr));
140 static int mount_add(struct uci_section *s)
142 struct blob_attr *tb[__MOUNT_MAX] = { 0 };
145 blob_buf_init(&b, 0);
146 uci_to_blob(&b, s, &mount_attr_list);
147 blobmsg_parse(mount_policy, __MOUNT_MAX, tb, blob_data(b.head), blob_len(b.head));
149 if (!tb[MOUNT_LABEL] && !tb[MOUNT_UUID] && !tb[MOUNT_DEVICE])
152 if (tb[MOUNT_ENABLE] && !blobmsg_get_u32(tb[MOUNT_ENABLE]))
155 m = malloc(sizeof(struct mount));
156 m->type = TYPE_MOUNT;
157 m->uuid = blobmsg_get_strdup(tb[MOUNT_UUID]);
158 m->label = blobmsg_get_strdup(tb[MOUNT_LABEL]);
159 m->target = blobmsg_get_strdup(tb[MOUNT_TARGET]);
160 m->options = blobmsg_get_strdup(tb[MOUNT_OPTIONS]);
161 m->device = blobmsg_get_strdup(tb[MOUNT_DEVICE]);
162 m->overlay = m->extroot = 0;
163 if (m->target && !strcmp(m->target, "/"))
165 if (m->target && !strcmp(m->target, "/overlay"))
166 m->extroot = m->overlay = 1;
169 vlist_add(&mounts, &m->node, m->uuid);
171 vlist_add(&mounts, &m->node, m->label);
173 vlist_add(&mounts, &m->node, m->device);
178 static int swap_add(struct uci_section *s)
180 struct blob_attr *tb[__SWAP_MAX] = { 0 };
183 blob_buf_init(&b, 0);
184 uci_to_blob(&b, s, &swap_attr_list);
185 blobmsg_parse(swap_policy, __SWAP_MAX, tb, blob_data(b.head), blob_len(b.head));
187 if (!tb[SWAP_UUID] && !tb[SWAP_DEVICE])
190 m = malloc(sizeof(struct mount));
191 memset(m, 0, sizeof(struct mount));
193 m->uuid = blobmsg_get_strdup(tb[SWAP_UUID]);
194 m->device = blobmsg_get_strdup(tb[SWAP_DEVICE]);
196 m->prio = blobmsg_get_u32(tb[SWAP_PRIO]);
198 m->prio = ((m->prio << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
200 if ((!tb[SWAP_ENABLE]) || blobmsg_get_u32(tb[SWAP_ENABLE]))
201 vlist_add(&mounts, &m->node, (m->uuid) ? (m->uuid) : (m->device));
206 static int global_add(struct uci_section *s)
208 struct blob_attr *tb[__CFG_MAX] = { 0 };
210 blob_buf_init(&b, 0);
211 uci_to_blob(&b, s, &config_attr_list);
212 blobmsg_parse(config_policy, __CFG_MAX, tb, blob_data(b.head), blob_len(b.head));
214 if ((tb[CFG_ANON_MOUNT]) && blobmsg_get_u32(tb[CFG_ANON_MOUNT]))
216 if ((tb[CFG_ANON_SWAP]) && blobmsg_get_u32(tb[CFG_ANON_SWAP]))
219 if ((tb[CFG_AUTO_MOUNT]) && blobmsg_get_u32(tb[CFG_AUTO_MOUNT]))
221 if ((tb[CFG_AUTO_SWAP]) && blobmsg_get_u32(tb[CFG_AUTO_SWAP]))
224 if (tb[CFG_DELAY_ROOT])
225 delay_root = blobmsg_get_u32(tb[CFG_DELAY_ROOT]);
227 if ((tb[CFG_CHECK_FS]) && blobmsg_get_u32(tb[CFG_CHECK_FS]))
233 static struct mount* find_swap(const char *uuid, const char *device)
237 vlist_for_each_element(&mounts, m, node) {
238 if (m->type != TYPE_SWAP)
240 if (uuid && m->uuid && !strcmp(m->uuid, uuid))
242 if (device && m->device && !strcmp(m->device, device))
249 static struct mount* find_block(const char *uuid, const char *label, const char *device,
254 vlist_for_each_element(&mounts, m, node) {
255 if (m->type != TYPE_MOUNT)
257 if (m->uuid && uuid && !strcmp(m->uuid, uuid))
259 if (m->label && label && !strcmp(m->label, label))
261 if (m->target && target && !strcmp(m->target, target))
263 if (m->device && device && !strcmp(m->device, device))
270 static void mounts_update(struct vlist_tree *tree, struct vlist_node *node_new,
271 struct vlist_node *node_old)
275 static int config_load(char *cfg)
277 struct uci_context *ctx;
278 struct uci_package *pkg;
279 struct uci_element *e;
281 vlist_init(&mounts, avl_strcmp, mounts_update);
283 ctx = uci_alloc_context();
286 snprintf(path, 32, "%s/etc/config", cfg);
287 uci_set_confdir(ctx, path);
290 if (uci_load(ctx, "fstab", &pkg))
293 vlist_update(&mounts);
294 uci_foreach_element(&pkg->sections, e) {
295 struct uci_section *s = uci_to_section(e);
297 if (!strcmp(s->type, "mount"))
299 if (!strcmp(s->type, "swap"))
301 if (!strcmp(s->type, "global"))
304 vlist_flush(&mounts);
309 static int _cache_load(const char *path)
311 int gl_flags = GLOB_NOESCAPE | GLOB_MARK;
315 if (glob(path, gl_flags, NULL, &gl) < 0)
318 for (j = 0; j < gl.gl_pathc; j++) {
319 struct blkid_struct_probe *pr = malloc(sizeof(struct blkid_struct_probe));
320 memset(pr, 0, sizeof(struct blkid_struct_probe));
321 probe_block(gl.gl_pathv[j], pr);
325 list_add_tail(&pr->list, &devices);
333 static void cache_load(int mtd)
336 _cache_load("/dev/mtdblock*");
337 _cache_load("/dev/mmcblk*");
338 _cache_load("/dev/sd*");
341 static int print_block_info(struct blkid_struct_probe *pr)
343 printf("%s:", pr->dev);
345 printf(" UUID=\"%s\"", pr->uuid);
348 printf(" LABEL=\"%s\"", pr->label);
351 printf(" NAME=\"%s\"", pr->name);
354 printf(" VERSION=\"%s\"", pr->version);
356 printf(" TYPE=\"%s\"\n", pr->id->name);
361 static int print_block_uci(struct blkid_struct_probe *pr)
363 if (!strcmp(pr->id->name, "swap")) {
364 printf("config 'swap'\n");
366 printf("config 'mount'\n");
367 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev));
370 printf("\toption\tuuid\t'%s'\n", pr->uuid);
372 printf("\toption\tdevice\t'%s'\n", basename(pr->dev));
373 printf("\toption\tenabled\t'0'\n\n");
378 static struct blkid_struct_probe* find_block_info(char *uuid, char *label, char *path)
380 struct blkid_struct_probe *pr = NULL;
383 list_for_each_entry(pr, &devices, list)
384 if (!strcmp(pr->uuid, uuid))
388 list_for_each_entry(pr, &devices, list)
389 if (strcmp(pr->label, label))
393 list_for_each_entry(pr, &devices, list)
394 if (!strcmp(pr->dev, path))
400 static char* find_mount_point(char *block)
402 FILE *fp = fopen("/proc/mounts", "r");
403 static char line[256];
404 int len = strlen(block);
410 while (fgets(line, sizeof(line), fp)) {
411 if (!strncmp(line, block, len)) {
412 char *p = &line[len + 1];
413 char *t = strstr(p, " ");
428 static void mkdir_p(char *dir)
430 char *l = strrchr(dir, '/');
440 static void check_filesystem(struct blkid_struct_probe *pr)
444 char *e2fsck = "/usr/sbin/e2fsck";
446 if (strncmp(pr->id->name, "ext", 3)) {
447 fprintf(stderr, "check_filesystem: %s is not supported\n", pr->id->name);
451 if (stat(e2fsck, &statbuf) < 0)
454 if (!(statbuf.st_mode & S_IXUSR))
459 execl(e2fsck, e2fsck, "-p", pr->dev, NULL);
461 } else if (pid > 0) {
463 waitpid(pid, &status, 0);
467 static int mount_device(struct blkid_struct_probe *pr, int hotplug)
470 char *device = basename(pr->dev);
475 if (!strcmp(pr->id->name, "swap")) {
476 if (hotplug && !auto_swap)
478 m = find_swap(pr->uuid, device);
480 swapon(pr->dev, (m) ? (m->prio) : (0));
485 if (hotplug && !auto_mount)
488 if (find_mount_point(pr->dev)) {
489 fprintf(stderr, "%s is already mounted\n", pr->dev);
493 m = find_block(pr->uuid, pr->label, device, NULL);
498 char *target = m->target;
499 char _target[] = "/mnt/mmcblk123";
503 snprintf(_target, sizeof(_target), "/mnt/%s", device);
509 check_filesystem(pr);
511 err = mount(pr->dev, target, pr->id->name, 0, (m->options) ? (m->options) : (""));
513 fprintf(stderr, "mounting %s (%s) as %s failed (%d) - %s\n",
514 pr->dev, pr->id->name, target, err, strerror(err));
519 char target[] = "/mnt/mmcblk123";
522 snprintf(target, sizeof(target), "/mnt/%s", device);
526 check_filesystem(pr);
528 err = mount(pr->dev, target, pr->id->name, 0, "");
530 fprintf(stderr, "mounting %s (%s) as %s failed (%d) - %s\n",
531 pr->dev, pr->id->name, target, err, strerror(err));
538 static int umount_device(struct blkid_struct_probe *pr)
541 char *device = basename(pr->dev);
548 if (!strcmp(pr->id->name, "swap"))
551 mp = find_mount_point(pr->dev);
555 m = find_block(pr->uuid, pr->label, device, NULL);
559 err = umount2(mp, MNT_DETACH);
561 fprintf(stderr, "unmounting %s (%s) failed (%d) - %s\n",
562 pr->dev, mp, err, strerror(err));
564 fprintf(stderr, "unmounted %s (%s)\n",
570 static int main_hotplug(int argc, char **argv)
573 char *action, *device, *mount_point;
575 action = getenv("ACTION");
576 device = getenv("DEVNAME");
578 if (!action || !device)
580 snprintf(path, sizeof(path), "/dev/%s", device);
582 if (!strcmp(action, "remove")) {
584 mount_point = find_mount_point(path);
586 err = umount2(mount_point, MNT_DETACH);
589 fprintf(stderr, "umount of %s failed (%d) - %s\n",
590 mount_point, err, strerror(err));
593 } else if (strcmp(action, "add")) {
594 fprintf(stderr, "Unkown action %s\n", action);
599 if (config_load(NULL))
603 return mount_device(find_block_info(NULL, NULL, path), 1);
606 static int find_block_mtd(char *name, char *part, int plen)
608 FILE *fp = fopen("/proc/mtd", "r");
609 static char line[256];
615 while (!index && fgets(line, sizeof(line), fp)) {
616 if (strstr(line, name)) {
617 char *eol = strstr(line, ":");
632 snprintf(part, plen, "/dev/mtdblock%s", index);
637 static int check_extroot(char *path)
639 struct blkid_struct_probe *pr = NULL;
642 if (find_block_mtd("rootfs", fs, sizeof(fs)))
645 list_for_each_entry(pr, &devices, list) {
646 if (!strcmp(pr->dev, fs)) {
650 char uuid[32] = { 0 };
652 snprintf(tag, sizeof(tag), "%s/etc/.extroot-uuid", path);
654 fp = fopen(tag, "w+");
656 fprintf(stderr, "extroot: failed to write uuid tag file\n");
657 /* return 0 to continue boot regardless of error */
665 fp = fopen(tag, "r");
667 fprintf(stderr, "extroot: failed to open uuid tag file\n");
671 fgets(uuid, sizeof(uuid), fp);
673 if (!strcmp(uuid, pr->uuid))
675 fprintf(stderr, "extroot: uuid tag does not match rom uuid\n");
681 static int mount_extroot(char *cfg)
683 char overlay[] = "/tmp/overlay";
684 char mnt[] = "/tmp/mnt";
686 struct blkid_struct_probe *pr;
690 if (config_load(cfg))
693 m = find_block(NULL, NULL, NULL, "/");
695 m = find_block(NULL, NULL, NULL, "/overlay");
697 if (!m || !m->extroot)
700 pr = find_block_info(m->uuid, m->label, NULL);
702 if (!pr && delay_root){
703 fprintf(stderr, "extroot: is not ready yet, retrying in %ui seconds\n", delay_root);
705 pr = find_block_info(m->uuid, m->label, NULL);
708 if (strncmp(pr->id->name, "ext", 3)) {
709 fprintf(stderr, "extroot: %s is not supported, try ext4\n", pr->id->name);
717 check_filesystem(pr);
719 err = mount(pr->dev, path, pr->id->name, 0, (m->options) ? (m->options) : (""));
722 fprintf(stderr, "mounting %s (%s) as %s failed (%d) - %s\n",
723 pr->dev, pr->id->name, path, err, strerror(err));
724 } else if (m->overlay) {
725 err = check_extroot(path);
734 static int main_extroot(int argc, char **argv)
736 struct blkid_struct_probe *pr;
738 char fs_data[32] = { 0 };
741 if (!getenv("PREINIT"))
745 fprintf(stderr, "Usage: block extroot mountpoint\n");
752 find_block_mtd("rootfs", fs, sizeof(fs));
756 pr = find_block_info(NULL, NULL, fs);
760 find_block_mtd("rootfs_data", fs_data, sizeof(fs_data));
762 pr = find_block_info(NULL, NULL, fs_data);
763 if (pr && !strcmp(pr->id->name, "jffs2")) {
764 char cfg[] = "/tmp/jffs_cfg";
767 if (!mount(fs_data, cfg, "jffs2", MS_NOATIME, NULL)) {
768 err = mount_extroot(cfg);
769 umount2(cfg, MNT_DETACH);
772 rmdir("/tmp/overlay");
778 return mount_extroot(NULL);
781 static int main_mount(int argc, char **argv)
783 struct blkid_struct_probe *pr;
785 if (config_load(NULL))
789 list_for_each_entry(pr, &devices, list)
795 static int main_umount(int argc, char **argv)
797 struct blkid_struct_probe *pr;
799 if (config_load(NULL))
803 list_for_each_entry(pr, &devices, list)
809 static int main_detect(int argc, char **argv)
811 struct blkid_struct_probe *pr;
814 printf("config 'global'\n");
815 printf("\toption\tanon_swap\t'0'\n");
816 printf("\toption\tanon_mount\t'0'\n");
817 printf("\toption\tauto_swap\t'1'\n");
818 printf("\toption\tauto_mount\t'1'\n");
819 printf("\toption\tdelay_root\t'0'\n");
820 printf("\toption\tcheck_fs\t'0'\n\n");
821 list_for_each_entry(pr, &devices, list)
827 static int main_info(int argc, char **argv)
830 struct blkid_struct_probe *pr;
834 list_for_each_entry(pr, &devices, list)
835 print_block_info(pr);
840 for (i = 2; i < argc; i++) {
843 if (stat(argv[i], &s)) {
844 fprintf(stderr, "failed to stat %s\n", argv[i]);
847 if (!S_ISBLK(s.st_mode)) {
848 fprintf(stderr, "%s is not a block device\n", argv[i]);
851 pr = find_block_info(NULL, NULL, argv[i]);
853 print_block_info(pr);
859 static int main_swapon(int argc, char **argv)
862 fprintf(stderr, "Usage: swapoff [-a] [DEVICE]\n\nStop swapping on DEVICE\n\n\t-a Stop swapping on all swap devices\n");
866 if (!strcmp(argv[1], "-a")) {
867 struct blkid_struct_probe *pr;
870 list_for_each_entry(pr, &devices, list) {
871 if (strcmp(pr->id->name, "swap"))
873 if (swapon(pr->dev, 0))
874 fprintf(stderr, "failed to swapon %s\n", pr->dev);
880 if (stat(argv[1], &s) || !S_ISBLK(s.st_mode)) {
881 fprintf(stderr, "%s is not a block device\n", argv[1]);
884 err = swapon(argv[1], 0);
886 fprintf(stderr, "failed to swapon %s (%d)\n", argv[1], err);
894 static int main_swapoff(int argc, char **argv)
897 fprintf(stderr, "Usage: swapoff [-a] [DEVICE]\n\nStop swapping on DEVICE\n\n\t-a Stop swapping on all swap devices\n");
901 if (!strcmp(argv[1], "-a")) {
902 FILE *fp = fopen("/proc/swaps", "r");
906 fprintf(stderr, "failed to open /proc/swaps\n");
909 fgets(line, sizeof(line), fp);
910 while (fgets(line, sizeof(line), fp)) {
911 char *end = strchr(line, ' ');
919 fprintf(stderr, "failed to swapoff %s (%d)\n", line, err);
926 if (stat(argv[1], &s) || !S_ISBLK(s.st_mode)) {
927 fprintf(stderr, "%s is not a block device\n", argv[1]);
930 err = swapoff(argv[1]);
932 fprintf(stderr, "fsiled to swapoff %s (%d)\n", argv[1], err);
940 int main(int argc, char **argv)
942 char *base = basename(*argv);
946 if (!strcmp(base, "swapon"))
947 return main_swapon(argc, argv);
949 if (!strcmp(base, "swapoff"))
950 return main_swapoff(argc, argv);
952 if ((argc > 1) && !strcmp(base, "block")) {
953 if (!strcmp(argv[1], "info"))
954 return main_info(argc, argv);
956 if (!strcmp(argv[1], "detect"))
957 return main_detect(argc, argv);
959 if (!strcmp(argv[1], "hotplug"))
960 return main_hotplug(argc, argv);
962 if (!strcmp(argv[1], "extroot"))
963 return main_extroot(argc, argv);
965 if (!strcmp(argv[1], "mount"))
966 return main_mount(argc, argv);
968 if (!strcmp(argv[1], "umount"))
969 return main_umount(argc, argv);
972 fprintf(stderr, "Usage: block <info|mount|umount|detect>\n");