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 char *blobmsg_get_basename(struct blob_attr *attr)
145 return strdup(basename(blobmsg_get_string(attr)));
148 static int mount_add(struct uci_section *s)
150 struct blob_attr *tb[__MOUNT_MAX] = { 0 };
153 blob_buf_init(&b, 0);
154 uci_to_blob(&b, s, &mount_attr_list);
155 blobmsg_parse(mount_policy, __MOUNT_MAX, tb, blob_data(b.head), blob_len(b.head));
157 if (!tb[MOUNT_LABEL] && !tb[MOUNT_UUID] && !tb[MOUNT_DEVICE])
160 if (tb[MOUNT_ENABLE] && !blobmsg_get_u32(tb[MOUNT_ENABLE]))
163 m = malloc(sizeof(struct mount));
164 m->type = TYPE_MOUNT;
165 m->uuid = blobmsg_get_strdup(tb[MOUNT_UUID]);
166 m->label = blobmsg_get_strdup(tb[MOUNT_LABEL]);
167 m->target = blobmsg_get_strdup(tb[MOUNT_TARGET]);
168 m->options = blobmsg_get_strdup(tb[MOUNT_OPTIONS]);
169 m->device = blobmsg_get_basename(tb[MOUNT_DEVICE]);
170 m->overlay = m->extroot = 0;
171 if (m->target && !strcmp(m->target, "/"))
173 if (m->target && !strcmp(m->target, "/overlay"))
174 m->extroot = m->overlay = 1;
177 vlist_add(&mounts, &m->node, m->uuid);
179 vlist_add(&mounts, &m->node, m->label);
181 vlist_add(&mounts, &m->node, m->device);
186 static int swap_add(struct uci_section *s)
188 struct blob_attr *tb[__SWAP_MAX] = { 0 };
191 blob_buf_init(&b, 0);
192 uci_to_blob(&b, s, &swap_attr_list);
193 blobmsg_parse(swap_policy, __SWAP_MAX, tb, blob_data(b.head), blob_len(b.head));
195 if (!tb[SWAP_UUID] && !tb[SWAP_DEVICE])
198 m = malloc(sizeof(struct mount));
199 memset(m, 0, sizeof(struct mount));
201 m->uuid = blobmsg_get_strdup(tb[SWAP_UUID]);
202 m->device = blobmsg_get_basename(tb[SWAP_DEVICE]);
204 m->prio = blobmsg_get_u32(tb[SWAP_PRIO]);
206 m->prio = ((m->prio << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
208 if ((!tb[SWAP_ENABLE]) || blobmsg_get_u32(tb[SWAP_ENABLE]))
209 vlist_add(&mounts, &m->node, (m->uuid) ? (m->uuid) : (m->device));
214 static int global_add(struct uci_section *s)
216 struct blob_attr *tb[__CFG_MAX] = { 0 };
218 blob_buf_init(&b, 0);
219 uci_to_blob(&b, s, &config_attr_list);
220 blobmsg_parse(config_policy, __CFG_MAX, tb, blob_data(b.head), blob_len(b.head));
222 if ((tb[CFG_ANON_MOUNT]) && blobmsg_get_u32(tb[CFG_ANON_MOUNT]))
224 if ((tb[CFG_ANON_SWAP]) && blobmsg_get_u32(tb[CFG_ANON_SWAP]))
227 if ((tb[CFG_AUTO_MOUNT]) && blobmsg_get_u32(tb[CFG_AUTO_MOUNT]))
229 if ((tb[CFG_AUTO_SWAP]) && blobmsg_get_u32(tb[CFG_AUTO_SWAP]))
232 if (tb[CFG_DELAY_ROOT])
233 delay_root = blobmsg_get_u32(tb[CFG_DELAY_ROOT]);
235 if ((tb[CFG_CHECK_FS]) && blobmsg_get_u32(tb[CFG_CHECK_FS]))
241 static struct mount* find_swap(const char *uuid, const char *device)
245 vlist_for_each_element(&mounts, m, node) {
246 if (m->type != TYPE_SWAP)
248 if (uuid && m->uuid && !strcmp(m->uuid, uuid))
250 if (device && m->device && !strcmp(m->device, device))
257 static struct mount* find_block(const char *uuid, const char *label, const char *device,
262 vlist_for_each_element(&mounts, m, node) {
263 if (m->type != TYPE_MOUNT)
265 if (m->uuid && uuid && !strcmp(m->uuid, uuid))
267 if (m->label && label && !strcmp(m->label, label))
269 if (m->target && target && !strcmp(m->target, target))
271 if (m->device && device && !strcmp(m->device, device))
278 static void mounts_update(struct vlist_tree *tree, struct vlist_node *node_new,
279 struct vlist_node *node_old)
283 static int config_load(char *cfg)
285 struct uci_context *ctx;
286 struct uci_package *pkg;
287 struct uci_element *e;
289 vlist_init(&mounts, avl_strcmp, mounts_update);
291 ctx = uci_alloc_context();
294 snprintf(path, 32, "%s/etc/config", cfg);
295 uci_set_confdir(ctx, path);
298 if (uci_load(ctx, "fstab", &pkg))
301 vlist_update(&mounts);
302 uci_foreach_element(&pkg->sections, e) {
303 struct uci_section *s = uci_to_section(e);
305 if (!strcmp(s->type, "mount"))
307 if (!strcmp(s->type, "swap"))
309 if (!strcmp(s->type, "global"))
312 vlist_flush(&mounts);
317 static int _cache_load(const char *path)
319 int gl_flags = GLOB_NOESCAPE | GLOB_MARK;
323 if (glob(path, gl_flags, NULL, &gl) < 0)
326 for (j = 0; j < gl.gl_pathc; j++) {
327 struct blkid_struct_probe *pr = malloc(sizeof(struct blkid_struct_probe));
328 memset(pr, 0, sizeof(struct blkid_struct_probe));
329 probe_block(gl.gl_pathv[j], pr);
333 list_add_tail(&pr->list, &devices);
341 static void cache_load(int mtd)
344 _cache_load("/dev/mtdblock*");
345 _cache_load("/dev/mmcblk*");
346 _cache_load("/dev/sd*");
349 static int print_block_info(struct blkid_struct_probe *pr)
351 printf("%s:", pr->dev);
353 printf(" UUID=\"%s\"", pr->uuid);
356 printf(" LABEL=\"%s\"", pr->label);
359 printf(" NAME=\"%s\"", pr->name);
362 printf(" VERSION=\"%s\"", pr->version);
364 printf(" TYPE=\"%s\"\n", pr->id->name);
369 static int print_block_uci(struct blkid_struct_probe *pr)
371 if (!strcmp(pr->id->name, "swap")) {
372 printf("config 'swap'\n");
374 printf("config 'mount'\n");
375 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev));
378 printf("\toption\tuuid\t'%s'\n", pr->uuid);
380 printf("\toption\tdevice\t'%s'\n", basename(pr->dev));
381 printf("\toption\tenabled\t'0'\n\n");
386 static struct blkid_struct_probe* find_block_info(char *uuid, char *label, char *path)
388 struct blkid_struct_probe *pr = NULL;
391 list_for_each_entry(pr, &devices, list)
392 if (!strcmp(pr->uuid, uuid))
396 list_for_each_entry(pr, &devices, list)
397 if (strcmp(pr->label, label))
401 list_for_each_entry(pr, &devices, list)
402 if (!strcmp(pr->dev, path))
408 static char* find_mount_point(char *block)
410 FILE *fp = fopen("/proc/mounts", "r");
411 static char line[256];
412 int len = strlen(block);
418 while (fgets(line, sizeof(line), fp)) {
419 if (!strncmp(line, block, len)) {
420 char *p = &line[len + 1];
421 char *t = strstr(p, " ");
436 static void mkdir_p(char *dir)
438 char *l = strrchr(dir, '/');
448 static void check_filesystem(struct blkid_struct_probe *pr)
452 char *e2fsck = "/usr/sbin/e2fsck";
454 if (strncmp(pr->id->name, "ext", 3)) {
455 fprintf(stderr, "check_filesystem: %s is not supported\n", pr->id->name);
459 if (stat(e2fsck, &statbuf) < 0) {
460 fprintf(stderr, "check_filesystem: %s not found\n", e2fsck);
466 execl(e2fsck, e2fsck, "-p", pr->dev, NULL);
468 } else if (pid > 0) {
471 waitpid(pid, &status, 0);
472 if (WEXITSTATUS(status))
473 fprintf(stderr, "check_filesystem: %s returned %d\n", e2fsck, WEXITSTATUS(status));
477 static int mount_device(struct blkid_struct_probe *pr, int hotplug)
480 char *device = basename(pr->dev);
485 if (!strcmp(pr->id->name, "swap")) {
486 if (hotplug && !auto_swap)
488 m = find_swap(pr->uuid, device);
490 swapon(pr->dev, (m) ? (m->prio) : (0));
495 if (hotplug && !auto_mount)
498 if (find_mount_point(pr->dev)) {
499 fprintf(stderr, "%s is already mounted\n", pr->dev);
503 m = find_block(pr->uuid, pr->label, device, NULL);
508 char *target = m->target;
509 char _target[] = "/mnt/mmcblk123";
513 snprintf(_target, sizeof(_target), "/mnt/%s", device);
519 check_filesystem(pr);
521 err = mount(pr->dev, target, pr->id->name, 0, (m->options) ? (m->options) : (""));
523 fprintf(stderr, "mounting %s (%s) as %s failed (%d) - %s\n",
524 pr->dev, pr->id->name, target, err, strerror(err));
529 char target[] = "/mnt/mmcblk123";
532 snprintf(target, sizeof(target), "/mnt/%s", device);
536 check_filesystem(pr);
538 err = mount(pr->dev, target, pr->id->name, 0, "");
540 fprintf(stderr, "mounting %s (%s) as %s failed (%d) - %s\n",
541 pr->dev, pr->id->name, target, err, strerror(err));
548 static int umount_device(struct blkid_struct_probe *pr)
551 char *device = basename(pr->dev);
558 if (!strcmp(pr->id->name, "swap"))
561 mp = find_mount_point(pr->dev);
565 m = find_block(pr->uuid, pr->label, device, NULL);
569 err = umount2(mp, MNT_DETACH);
571 fprintf(stderr, "unmounting %s (%s) failed (%d) - %s\n",
572 pr->dev, mp, err, strerror(err));
574 fprintf(stderr, "unmounted %s (%s)\n",
580 static int main_hotplug(int argc, char **argv)
583 char *action, *device, *mount_point;
585 action = getenv("ACTION");
586 device = getenv("DEVNAME");
588 if (!action || !device)
590 snprintf(path, sizeof(path), "/dev/%s", device);
592 if (!strcmp(action, "remove")) {
594 mount_point = find_mount_point(path);
596 err = umount2(mount_point, MNT_DETACH);
599 fprintf(stderr, "umount of %s failed (%d) - %s\n",
600 mount_point, err, strerror(err));
603 } else if (strcmp(action, "add")) {
604 fprintf(stderr, "Unkown action %s\n", action);
609 if (config_load(NULL))
613 return mount_device(find_block_info(NULL, NULL, path), 1);
616 static int find_block_mtd(char *name, char *part, int plen)
618 FILE *fp = fopen("/proc/mtd", "r");
619 static char line[256];
625 while (!index && fgets(line, sizeof(line), fp)) {
626 if (strstr(line, name)) {
627 char *eol = strstr(line, ":");
642 snprintf(part, plen, "/dev/mtdblock%s", index);
647 static int check_extroot(char *path)
649 struct blkid_struct_probe *pr = NULL;
652 if (find_block_mtd("rootfs", fs, sizeof(fs)))
655 list_for_each_entry(pr, &devices, list) {
656 if (!strcmp(pr->dev, fs)) {
660 char uuid[32] = { 0 };
662 snprintf(tag, sizeof(tag), "%s/etc/.extroot-uuid", path);
664 fp = fopen(tag, "w+");
666 fprintf(stderr, "extroot: failed to write uuid tag file\n");
667 /* return 0 to continue boot regardless of error */
675 fp = fopen(tag, "r");
677 fprintf(stderr, "extroot: failed to open uuid tag file\n");
681 fgets(uuid, sizeof(uuid), fp);
683 if (!strcmp(uuid, pr->uuid))
685 fprintf(stderr, "extroot: uuid tag does not match rom uuid\n");
691 static int mount_extroot(char *cfg)
693 char overlay[] = "/tmp/overlay";
694 char mnt[] = "/tmp/mnt";
696 struct blkid_struct_probe *pr;
700 if (config_load(cfg))
703 m = find_block(NULL, NULL, NULL, "/");
705 m = find_block(NULL, NULL, NULL, "/overlay");
707 if (!m || !m->extroot)
710 pr = find_block_info(m->uuid, m->label, NULL);
712 if (!pr && delay_root){
713 fprintf(stderr, "extroot: is not ready yet, retrying in %ui seconds\n", delay_root);
717 pr = find_block_info(m->uuid, m->label, NULL);
720 if (strncmp(pr->id->name, "ext", 3)) {
721 fprintf(stderr, "extroot: %s is not supported, try ext4\n", pr->id->name);
729 check_filesystem(pr);
731 err = mount(pr->dev, path, pr->id->name, 0, (m->options) ? (m->options) : (""));
734 fprintf(stderr, "mounting %s (%s) as %s failed (%d) - %s\n",
735 pr->dev, pr->id->name, path, err, strerror(err));
736 } else if (m->overlay) {
737 err = check_extroot(path);
746 static int main_extroot(int argc, char **argv)
748 struct blkid_struct_probe *pr;
750 char fs_data[32] = { 0 };
753 if (!getenv("PREINIT"))
757 fprintf(stderr, "Usage: block extroot mountpoint\n");
764 find_block_mtd("rootfs", fs, sizeof(fs));
768 pr = find_block_info(NULL, NULL, fs);
772 find_block_mtd("rootfs_data", fs_data, sizeof(fs_data));
774 pr = find_block_info(NULL, NULL, fs_data);
775 if (pr && !strcmp(pr->id->name, "jffs2")) {
776 char cfg[] = "/tmp/jffs_cfg";
779 if (!mount(fs_data, cfg, "jffs2", MS_NOATIME, NULL)) {
780 err = mount_extroot(cfg);
781 umount2(cfg, MNT_DETACH);
784 rmdir("/tmp/overlay");
790 return mount_extroot(NULL);
793 static int main_mount(int argc, char **argv)
795 struct blkid_struct_probe *pr;
797 if (config_load(NULL))
801 list_for_each_entry(pr, &devices, list)
807 static int main_umount(int argc, char **argv)
809 struct blkid_struct_probe *pr;
811 if (config_load(NULL))
815 list_for_each_entry(pr, &devices, list)
821 static int main_detect(int argc, char **argv)
823 struct blkid_struct_probe *pr;
826 printf("config 'global'\n");
827 printf("\toption\tanon_swap\t'0'\n");
828 printf("\toption\tanon_mount\t'0'\n");
829 printf("\toption\tauto_swap\t'1'\n");
830 printf("\toption\tauto_mount\t'1'\n");
831 printf("\toption\tdelay_root\t'0'\n");
832 printf("\toption\tcheck_fs\t'0'\n\n");
833 list_for_each_entry(pr, &devices, list)
839 static int main_info(int argc, char **argv)
842 struct blkid_struct_probe *pr;
846 list_for_each_entry(pr, &devices, list)
847 print_block_info(pr);
852 for (i = 2; i < argc; i++) {
855 if (stat(argv[i], &s)) {
856 fprintf(stderr, "failed to stat %s\n", argv[i]);
859 if (!S_ISBLK(s.st_mode)) {
860 fprintf(stderr, "%s is not a block device\n", argv[i]);
863 pr = find_block_info(NULL, NULL, argv[i]);
865 print_block_info(pr);
871 static int main_swapon(int argc, char **argv)
874 fprintf(stderr, "Usage: swapoff [-a] [DEVICE]\n\nStop swapping on DEVICE\n\n\t-a Stop swapping on all swap devices\n");
878 if (!strcmp(argv[1], "-a")) {
879 struct blkid_struct_probe *pr;
882 list_for_each_entry(pr, &devices, list) {
883 if (strcmp(pr->id->name, "swap"))
885 if (swapon(pr->dev, 0))
886 fprintf(stderr, "failed to swapon %s\n", pr->dev);
892 if (stat(argv[1], &s) || !S_ISBLK(s.st_mode)) {
893 fprintf(stderr, "%s is not a block device\n", argv[1]);
896 err = swapon(argv[1], 0);
898 fprintf(stderr, "failed to swapon %s (%d)\n", argv[1], err);
906 static int main_swapoff(int argc, char **argv)
909 fprintf(stderr, "Usage: swapoff [-a] [DEVICE]\n\nStop swapping on DEVICE\n\n\t-a Stop swapping on all swap devices\n");
913 if (!strcmp(argv[1], "-a")) {
914 FILE *fp = fopen("/proc/swaps", "r");
918 fprintf(stderr, "failed to open /proc/swaps\n");
921 fgets(line, sizeof(line), fp);
922 while (fgets(line, sizeof(line), fp)) {
923 char *end = strchr(line, ' ');
931 fprintf(stderr, "failed to swapoff %s (%d)\n", line, err);
938 if (stat(argv[1], &s) || !S_ISBLK(s.st_mode)) {
939 fprintf(stderr, "%s is not a block device\n", argv[1]);
942 err = swapoff(argv[1]);
944 fprintf(stderr, "fsiled to swapoff %s (%d)\n", argv[1], err);
952 int main(int argc, char **argv)
954 char *base = basename(*argv);
958 if (!strcmp(base, "swapon"))
959 return main_swapon(argc, argv);
961 if (!strcmp(base, "swapoff"))
962 return main_swapoff(argc, argv);
964 if ((argc > 1) && !strcmp(base, "block")) {
965 if (!strcmp(argv[1], "info"))
966 return main_info(argc, argv);
968 if (!strcmp(argv[1], "detect"))
969 return main_detect(argc, argv);
971 if (!strcmp(argv[1], "hotplug"))
972 return main_hotplug(argc, argv);
974 if (!strcmp(argv[1], "extroot"))
975 return main_extroot(argc, argv);
977 if (!strcmp(argv[1], "mount"))
978 return main_mount(argc, argv);
980 if (!strcmp(argv[1], "umount"))
981 return main_umount(argc, argv);
984 fprintf(stderr, "Usage: block <info|mount|umount|detect>\n");