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*");
347 _cache_load("/dev/sdc*");
348 _cache_load("/dev/hd*");
351 static int print_block_info(struct blkid_struct_probe *pr)
353 printf("%s:", pr->dev);
355 printf(" UUID=\"%s\"", pr->uuid);
358 printf(" LABEL=\"%s\"", pr->label);
361 printf(" NAME=\"%s\"", pr->name);
364 printf(" VERSION=\"%s\"", pr->version);
366 printf(" TYPE=\"%s\"\n", pr->id->name);
371 static int print_block_uci(struct blkid_struct_probe *pr)
373 if (!strcmp(pr->id->name, "swap")) {
374 printf("config 'swap'\n");
376 printf("config 'mount'\n");
377 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev));
380 printf("\toption\tuuid\t'%s'\n", pr->uuid);
382 printf("\toption\tdevice\t'%s'\n", pr->dev);
383 printf("\toption\tenabled\t'0'\n\n");
388 static struct blkid_struct_probe* find_block_info(char *uuid, char *label, char *path)
390 struct blkid_struct_probe *pr = NULL;
393 list_for_each_entry(pr, &devices, list)
394 if (!strcmp(pr->uuid, uuid))
398 list_for_each_entry(pr, &devices, list)
399 if (strcmp(pr->label, label))
403 list_for_each_entry(pr, &devices, list)
404 if (!strcmp(pr->dev, path))
410 static char* find_mount_point(char *block)
412 FILE *fp = fopen("/proc/mounts", "r");
413 static char line[256];
414 int len = strlen(block);
420 while (fgets(line, sizeof(line), fp)) {
421 if (!strncmp(line, block, len)) {
422 char *p = &line[len + 1];
423 char *t = strstr(p, " ");
438 static void mkdir_p(char *dir)
440 char *l = strrchr(dir, '/');
450 static void check_filesystem(struct blkid_struct_probe *pr)
454 char *e2fsck = "/usr/sbin/e2fsck";
456 if (strncmp(pr->id->name, "ext", 3)) {
457 fprintf(stderr, "check_filesystem: %s is not supported\n", pr->id->name);
461 if (stat(e2fsck, &statbuf) < 0) {
462 fprintf(stderr, "check_filesystem: %s not found\n", e2fsck);
468 execl(e2fsck, e2fsck, "-p", pr->dev, NULL);
470 } else if (pid > 0) {
473 waitpid(pid, &status, 0);
474 if (WEXITSTATUS(status))
475 fprintf(stderr, "check_filesystem: %s returned %d\n", e2fsck, WEXITSTATUS(status));
479 static int mount_device(struct blkid_struct_probe *pr, int hotplug)
482 char *device = basename(pr->dev);
487 if (!strcmp(pr->id->name, "swap")) {
488 if (hotplug && !auto_swap)
490 m = find_swap(pr->uuid, device);
492 swapon(pr->dev, (m) ? (m->prio) : (0));
497 if (hotplug && !auto_mount)
500 if (find_mount_point(pr->dev)) {
501 fprintf(stderr, "%s is already mounted\n", pr->dev);
505 m = find_block(pr->uuid, pr->label, device, NULL);
510 char *target = m->target;
511 char _target[] = "/mnt/mmcblk123";
515 snprintf(_target, sizeof(_target), "/mnt/%s", device);
521 check_filesystem(pr);
523 err = mount(pr->dev, target, pr->id->name, 0, (m->options) ? (m->options) : (""));
525 fprintf(stderr, "mounting %s (%s) as %s failed (%d) - %s\n",
526 pr->dev, pr->id->name, target, err, strerror(err));
531 char target[] = "/mnt/mmcblk123";
534 snprintf(target, sizeof(target), "/mnt/%s", device);
538 check_filesystem(pr);
540 err = mount(pr->dev, target, pr->id->name, 0, "");
542 fprintf(stderr, "mounting %s (%s) as %s failed (%d) - %s\n",
543 pr->dev, pr->id->name, target, err, strerror(err));
550 static int umount_device(struct blkid_struct_probe *pr)
553 char *device = basename(pr->dev);
560 if (!strcmp(pr->id->name, "swap"))
563 mp = find_mount_point(pr->dev);
567 m = find_block(pr->uuid, pr->label, device, NULL);
571 err = umount2(mp, MNT_DETACH);
573 fprintf(stderr, "unmounting %s (%s) failed (%d) - %s\n",
574 pr->dev, mp, err, strerror(err));
576 fprintf(stderr, "unmounted %s (%s)\n",
582 static int main_hotplug(int argc, char **argv)
585 char *action, *device, *mount_point;
587 action = getenv("ACTION");
588 device = getenv("DEVNAME");
590 if (!action || !device)
592 snprintf(path, sizeof(path), "/dev/%s", device);
594 if (!strcmp(action, "remove")) {
596 mount_point = find_mount_point(path);
598 err = umount2(mount_point, MNT_DETACH);
601 fprintf(stderr, "umount of %s failed (%d) - %s\n",
602 mount_point, err, strerror(err));
605 } else if (strcmp(action, "add")) {
606 fprintf(stderr, "Unkown action %s\n", action);
611 if (config_load(NULL))
615 return mount_device(find_block_info(NULL, NULL, path), 1);
618 static int find_block_mtd(char *name, char *part, int plen)
620 FILE *fp = fopen("/proc/mtd", "r");
621 static char line[256];
627 while (!index && fgets(line, sizeof(line), fp)) {
628 if (strstr(line, name)) {
629 char *eol = strstr(line, ":");
644 snprintf(part, plen, "/dev/mtdblock%s", index);
649 static int check_extroot(char *path)
651 struct blkid_struct_probe *pr = NULL;
654 if (find_block_mtd("rootfs", fs, sizeof(fs)))
657 list_for_each_entry(pr, &devices, list) {
658 if (!strcmp(pr->dev, fs)) {
662 char uuid[32] = { 0 };
664 snprintf(tag, sizeof(tag), "%s/etc/.extroot-uuid", path);
666 fp = fopen(tag, "w+");
668 fprintf(stderr, "extroot: failed to write uuid tag file\n");
669 /* return 0 to continue boot regardless of error */
677 fp = fopen(tag, "r");
679 fprintf(stderr, "extroot: failed to open uuid tag file\n");
683 fgets(uuid, sizeof(uuid), fp);
685 if (!strcmp(uuid, pr->uuid))
687 fprintf(stderr, "extroot: uuid tag does not match rom uuid\n");
693 static int mount_extroot(char *cfg)
695 char overlay[] = "/tmp/overlay";
696 char mnt[] = "/tmp/mnt";
698 struct blkid_struct_probe *pr;
702 if (config_load(cfg))
705 m = find_block(NULL, NULL, NULL, "/");
707 m = find_block(NULL, NULL, NULL, "/overlay");
709 if (!m || !m->extroot)
712 pr = find_block_info(m->uuid, m->label, NULL);
714 if (!pr && delay_root){
715 fprintf(stderr, "extroot: is not ready yet, retrying in %ui seconds\n", delay_root);
719 pr = find_block_info(m->uuid, m->label, NULL);
722 if (strncmp(pr->id->name, "ext", 3)) {
723 fprintf(stderr, "extroot: %s is not supported, try ext4\n", pr->id->name);
731 check_filesystem(pr);
733 err = mount(pr->dev, path, pr->id->name, 0, (m->options) ? (m->options) : (""));
736 fprintf(stderr, "mounting %s (%s) as %s failed (%d) - %s\n",
737 pr->dev, pr->id->name, path, err, strerror(err));
738 } else if (m->overlay) {
739 err = check_extroot(path);
748 static int main_extroot(int argc, char **argv)
750 struct blkid_struct_probe *pr;
752 char fs_data[32] = { 0 };
755 if (!getenv("PREINIT"))
759 fprintf(stderr, "Usage: block extroot mountpoint\n");
766 find_block_mtd("rootfs", fs, sizeof(fs));
770 pr = find_block_info(NULL, NULL, fs);
774 find_block_mtd("rootfs_data", fs_data, sizeof(fs_data));
776 pr = find_block_info(NULL, NULL, fs_data);
777 if (pr && !strcmp(pr->id->name, "jffs2")) {
778 char cfg[] = "/tmp/jffs_cfg";
781 if (!mount(fs_data, cfg, "jffs2", MS_NOATIME, NULL)) {
782 err = mount_extroot(cfg);
783 umount2(cfg, MNT_DETACH);
786 rmdir("/tmp/overlay");
792 return mount_extroot(NULL);
795 static int main_mount(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_umount(int argc, char **argv)
811 struct blkid_struct_probe *pr;
813 if (config_load(NULL))
817 list_for_each_entry(pr, &devices, list)
823 static int main_detect(int argc, char **argv)
825 struct blkid_struct_probe *pr;
828 printf("config 'global'\n");
829 printf("\toption\tanon_swap\t'0'\n");
830 printf("\toption\tanon_mount\t'0'\n");
831 printf("\toption\tauto_swap\t'1'\n");
832 printf("\toption\tauto_mount\t'1'\n");
833 printf("\toption\tdelay_root\t'0'\n");
834 printf("\toption\tcheck_fs\t'0'\n\n");
835 list_for_each_entry(pr, &devices, list)
841 static int main_info(int argc, char **argv)
844 struct blkid_struct_probe *pr;
848 list_for_each_entry(pr, &devices, list)
849 print_block_info(pr);
854 for (i = 2; i < argc; i++) {
857 if (stat(argv[i], &s)) {
858 fprintf(stderr, "failed to stat %s\n", argv[i]);
861 if (!S_ISBLK(s.st_mode)) {
862 fprintf(stderr, "%s is not a block device\n", argv[i]);
865 pr = find_block_info(NULL, NULL, argv[i]);
867 print_block_info(pr);
873 static int main_swapon(int argc, char **argv)
876 fprintf(stderr, "Usage: swapoff [-a] [DEVICE]\n\nStop swapping on DEVICE\n\n\t-a Stop swapping on all swap devices\n");
880 if (!strcmp(argv[1], "-a")) {
881 struct blkid_struct_probe *pr;
884 list_for_each_entry(pr, &devices, list) {
885 if (strcmp(pr->id->name, "swap"))
887 if (swapon(pr->dev, 0))
888 fprintf(stderr, "failed to swapon %s\n", pr->dev);
894 if (stat(argv[1], &s) || !S_ISBLK(s.st_mode)) {
895 fprintf(stderr, "%s is not a block device\n", argv[1]);
898 err = swapon(argv[1], 0);
900 fprintf(stderr, "failed to swapon %s (%d)\n", argv[1], err);
908 static int main_swapoff(int argc, char **argv)
911 fprintf(stderr, "Usage: swapoff [-a] [DEVICE]\n\nStop swapping on DEVICE\n\n\t-a Stop swapping on all swap devices\n");
915 if (!strcmp(argv[1], "-a")) {
916 FILE *fp = fopen("/proc/swaps", "r");
920 fprintf(stderr, "failed to open /proc/swaps\n");
923 fgets(line, sizeof(line), fp);
924 while (fgets(line, sizeof(line), fp)) {
925 char *end = strchr(line, ' ');
933 fprintf(stderr, "failed to swapoff %s (%d)\n", line, err);
940 if (stat(argv[1], &s) || !S_ISBLK(s.st_mode)) {
941 fprintf(stderr, "%s is not a block device\n", argv[1]);
944 err = swapoff(argv[1]);
946 fprintf(stderr, "fsiled to swapoff %s (%d)\n", argv[1], err);
954 int main(int argc, char **argv)
956 char *base = basename(*argv);
960 if (!strcmp(base, "swapon"))
961 return main_swapon(argc, argv);
963 if (!strcmp(base, "swapoff"))
964 return main_swapoff(argc, argv);
966 if ((argc > 1) && !strcmp(base, "block")) {
967 if (!strcmp(argv[1], "info"))
968 return main_info(argc, argv);
970 if (!strcmp(argv[1], "detect"))
971 return main_detect(argc, argv);
973 if (!strcmp(argv[1], "hotplug"))
974 return main_hotplug(argc, argv);
976 if (!strcmp(argv[1], "extroot"))
977 return main_extroot(argc, argv);
979 if (!strcmp(argv[1], "mount"))
980 return main_mount(argc, argv);
982 if (!strcmp(argv[1], "umount"))
983 return main_umount(argc, argv);
986 fprintf(stderr, "Usage: block <info|mount|umount|detect>\n");