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.
26 #include <sys/types.h>
28 #include <sys/mount.h>
34 #include <libubox/list.h>
35 #include <libubox/vlist.h>
36 #include <libubox/blobmsg_json.h>
37 #include <libubox/avl-cmp.h>
39 #include "libblkid-tiny/libblkid-tiny.h"
42 #include "libubi/libubi.h"
47 static void klog(int prio, const char *fmt, ...)
50 FILE *f = fopen("/dev/kmsg", "w");
53 fprintf(f, "<%d>", prio);
63 #define KINFO(fmt, ...) do { \
64 if (kmsg) klog(LOG_INFO, "block: " fmt, ## __VA_ARGS__); \
67 #define ERROR(fmt, ...) do { \
69 klog(LOG_ERR, "block: " fmt, ## __VA_ARGS__); \
71 syslog(LOG_ERR, fmt, ## __VA_ARGS__); \
72 fprintf(stderr, "block: "fmt, ## __VA_ARGS__); \
82 struct vlist_node node;
98 static struct vlist_tree mounts;
99 static struct blob_buf b;
100 static LIST_HEAD(devices);
101 static int anon_mount, anon_swap, auto_mount, auto_swap, check_fs;
102 static unsigned int delay_root;
114 static const struct blobmsg_policy config_policy[__CFG_MAX] = {
115 [CFG_ANON_SWAP] = { .name = "anon_swap", .type = BLOBMSG_TYPE_INT32 },
116 [CFG_ANON_MOUNT] = { .name = "anon_mount", .type = BLOBMSG_TYPE_INT32 },
117 [CFG_AUTO_SWAP] = { .name = "auto_swap", .type = BLOBMSG_TYPE_INT32 },
118 [CFG_AUTO_MOUNT] = { .name = "auto_mount", .type = BLOBMSG_TYPE_INT32 },
119 [CFG_DELAY_ROOT] = { .name = "delay_root", .type = BLOBMSG_TYPE_INT32 },
120 [CFG_CHECK_FS] = { .name = "check_fs", .type = BLOBMSG_TYPE_INT32 },
133 static const struct uci_blob_param_list config_attr_list = {
134 .n_params = __CFG_MAX,
135 .params = config_policy,
138 static const struct blobmsg_policy mount_policy[__MOUNT_MAX] = {
139 [MOUNT_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING },
140 [MOUNT_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING },
141 [MOUNT_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
142 [MOUNT_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
143 [MOUNT_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_STRING },
144 [MOUNT_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
147 static const struct uci_blob_param_list mount_attr_list = {
148 .n_params = __MOUNT_MAX,
149 .params = mount_policy,
161 static const struct blobmsg_policy swap_policy[__SWAP_MAX] = {
162 [SWAP_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
163 [SWAP_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING },
164 [SWAP_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING },
165 [SWAP_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
166 [SWAP_PRIO] = { .name = "priority", .type = BLOBMSG_TYPE_INT32 },
169 static const struct uci_blob_param_list swap_attr_list = {
170 .n_params = __SWAP_MAX,
171 .params = swap_policy,
180 # define MS_DIRSYNC (1 << 7)
184 # define MS_RELATIME (1 << 21)
187 #ifndef MS_STRICTATIME
188 # define MS_STRICTATIME (1 << 24)
191 static const struct mount_flag mount_flags[] = {
192 { "sync", MS_SYNCHRONOUS },
193 { "async", ~MS_SYNCHRONOUS },
194 { "dirsync", MS_DIRSYNC },
195 { "mand", MS_MANDLOCK },
196 { "nomand", ~MS_MANDLOCK },
197 { "atime", ~MS_NOATIME },
198 { "noatime", MS_NOATIME },
199 { "dev", ~MS_NODEV },
200 { "nodev", MS_NODEV },
201 { "diratime", ~MS_NODIRATIME },
202 { "nodiratime", MS_NODIRATIME },
203 { "exec", ~MS_NOEXEC },
204 { "noexec", MS_NOEXEC },
205 { "suid", ~MS_NOSUID },
206 { "nosuid", MS_NOSUID },
207 { "rw", ~MS_RDONLY },
209 { "relatime", MS_RELATIME },
210 { "norelatime", ~MS_RELATIME },
211 { "strictatime", MS_STRICTATIME },
214 static char *blobmsg_get_strdup(struct blob_attr *attr)
219 return strdup(blobmsg_get_string(attr));
222 static char *blobmsg_get_basename(struct blob_attr *attr)
227 return strdup(basename(blobmsg_get_string(attr)));
230 static void parse_mount_options(struct mount *m, char *optstr)
234 char *p, *opts, *last;
239 if (!optstr || !*optstr)
242 m->options = opts = calloc(1, strlen(optstr) + 1);
255 for (i = 0, is_flag = false; i < ARRAY_SIZE(mount_flags); i++) {
256 if (!strcmp(last, mount_flags[i].name)) {
257 if (mount_flags[i].flag < 0)
258 m->flags &= (uint32_t)mount_flags[i].flag;
260 m->flags |= (uint32_t)mount_flags[i].flag;
267 opts += sprintf(opts, "%s%s", (opts > m->options) ? "," : "", last);
276 static int mount_add(struct uci_section *s)
278 struct blob_attr *tb[__MOUNT_MAX] = { 0 };
281 blob_buf_init(&b, 0);
282 uci_to_blob(&b, s, &mount_attr_list);
283 blobmsg_parse(mount_policy, __MOUNT_MAX, tb, blob_data(b.head), blob_len(b.head));
285 if (!tb[MOUNT_LABEL] && !tb[MOUNT_UUID] && !tb[MOUNT_DEVICE])
288 if (tb[MOUNT_ENABLE] && !blobmsg_get_u32(tb[MOUNT_ENABLE]))
291 m = malloc(sizeof(struct mount));
292 m->type = TYPE_MOUNT;
293 m->uuid = blobmsg_get_strdup(tb[MOUNT_UUID]);
294 m->label = blobmsg_get_strdup(tb[MOUNT_LABEL]);
295 m->target = blobmsg_get_strdup(tb[MOUNT_TARGET]);
296 m->device = blobmsg_get_basename(tb[MOUNT_DEVICE]);
298 parse_mount_options(m, blobmsg_get_strdup(tb[MOUNT_OPTIONS]));
300 m->overlay = m->extroot = 0;
301 if (m->target && !strcmp(m->target, "/"))
303 if (m->target && !strcmp(m->target, "/overlay"))
304 m->extroot = m->overlay = 1;
307 vlist_add(&mounts, &m->node, m->uuid);
309 vlist_add(&mounts, &m->node, m->label);
311 vlist_add(&mounts, &m->node, m->device);
316 static int swap_add(struct uci_section *s)
318 struct blob_attr *tb[__SWAP_MAX] = { 0 };
321 blob_buf_init(&b, 0);
322 uci_to_blob(&b, s, &swap_attr_list);
323 blobmsg_parse(swap_policy, __SWAP_MAX, tb, blob_data(b.head), blob_len(b.head));
325 if (!tb[SWAP_UUID] && !tb[SWAP_LABEL] && !tb[SWAP_DEVICE])
328 m = malloc(sizeof(struct mount));
329 memset(m, 0, sizeof(struct mount));
331 m->uuid = blobmsg_get_strdup(tb[SWAP_UUID]);
332 m->label = blobmsg_get_strdup(tb[SWAP_LABEL]);
333 m->device = blobmsg_get_basename(tb[SWAP_DEVICE]);
335 m->prio = blobmsg_get_u32(tb[SWAP_PRIO]);
337 m->prio = ((m->prio << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
339 if ((!tb[SWAP_ENABLE]) || blobmsg_get_u32(tb[SWAP_ENABLE])) {
340 /* store complete swap path */
342 m->target = blobmsg_get_strdup(tb[SWAP_DEVICE]);
345 vlist_add(&mounts, &m->node, m->uuid);
347 vlist_add(&mounts, &m->node, m->label);
349 vlist_add(&mounts, &m->node, m->device);
355 static int global_add(struct uci_section *s)
357 struct blob_attr *tb[__CFG_MAX] = { 0 };
359 blob_buf_init(&b, 0);
360 uci_to_blob(&b, s, &config_attr_list);
361 blobmsg_parse(config_policy, __CFG_MAX, tb, blob_data(b.head), blob_len(b.head));
363 if ((tb[CFG_ANON_MOUNT]) && blobmsg_get_u32(tb[CFG_ANON_MOUNT]))
365 if ((tb[CFG_ANON_SWAP]) && blobmsg_get_u32(tb[CFG_ANON_SWAP]))
368 if ((tb[CFG_AUTO_MOUNT]) && blobmsg_get_u32(tb[CFG_AUTO_MOUNT]))
370 if ((tb[CFG_AUTO_SWAP]) && blobmsg_get_u32(tb[CFG_AUTO_SWAP]))
373 if (tb[CFG_DELAY_ROOT])
374 delay_root = blobmsg_get_u32(tb[CFG_DELAY_ROOT]);
376 if ((tb[CFG_CHECK_FS]) && blobmsg_get_u32(tb[CFG_CHECK_FS]))
382 static struct mount* find_swap(const char *uuid, const char *label, const char *device)
386 vlist_for_each_element(&mounts, m, node) {
387 if (m->type != TYPE_SWAP)
389 if (uuid && m->uuid && !strcasecmp(m->uuid, uuid))
391 if (label && m->label && !strcmp(m->label, label))
393 if (device && m->device && !strcmp(m->device, device))
400 static struct mount* find_block(const char *uuid, const char *label, const char *device,
405 vlist_for_each_element(&mounts, m, node) {
406 if (m->type != TYPE_MOUNT)
408 if (m->uuid && uuid && !strcasecmp(m->uuid, uuid))
410 if (m->label && label && !strcmp(m->label, label))
412 if (m->target && target && !strcmp(m->target, target))
414 if (m->device && device && !strcmp(m->device, device))
421 static void mounts_update(struct vlist_tree *tree, struct vlist_node *node_new,
422 struct vlist_node *node_old)
426 static struct uci_package * config_try_load(struct uci_context *ctx, char *path)
428 char *file = basename(path);
429 char *dir = dirname(path);
431 struct uci_package *pkg;
433 uci_set_confdir(ctx, dir);
434 KINFO("attempting to load %s/%s\n", dir, file);
436 if (uci_load(ctx, file, &pkg)) {
437 uci_get_errorstr(ctx, &err, file);
438 ERROR("unable to load configuration (%s)\n", err);
447 static int config_load(char *cfg)
449 struct uci_context *ctx = uci_alloc_context();
450 struct uci_package *pkg = NULL;
451 struct uci_element *e;
454 vlist_init(&mounts, avl_strcmp, mounts_update);
457 snprintf(path, sizeof(path), "%s/upper/etc/config/fstab", cfg);
458 pkg = config_try_load(ctx, path);
461 snprintf(path, sizeof(path), "%s/etc/config/fstab", cfg);
462 pkg = config_try_load(ctx, path);
467 snprintf(path, sizeof(path), "/etc/config/fstab");
468 pkg = config_try_load(ctx, path);
472 ERROR("extroot: no usable configuration\n");
476 vlist_update(&mounts);
477 uci_foreach_element(&pkg->sections, e) {
478 struct uci_section *s = uci_to_section(e);
480 if (!strcmp(s->type, "mount"))
482 if (!strcmp(s->type, "swap"))
484 if (!strcmp(s->type, "global"))
487 vlist_flush(&mounts);
492 static struct blkid_struct_probe* _probe_path(char *path)
494 struct blkid_struct_probe *pr;
496 pr = malloc(sizeof(*pr));
501 memset(pr, 0, sizeof(*pr));
502 probe_block(path, pr);
504 if (pr->err || !pr->id) {
512 static int _cache_load(const char *path)
514 int gl_flags = GLOB_NOESCAPE | GLOB_MARK;
518 if (glob(path, gl_flags, NULL, &gl) < 0)
521 for (j = 0; j < gl.gl_pathc; j++) {
522 struct blkid_struct_probe *pr = _probe_path(gl.gl_pathv[j]);
524 list_add_tail(&pr->list, &devices);
532 static void cache_load(int mtd)
535 _cache_load("/dev/mtdblock*");
536 _cache_load("/dev/ubiblock*");
537 _cache_load("/dev/ubi?*_?*");
539 _cache_load("/dev/mmcblk*");
540 _cache_load("/dev/sd*");
541 _cache_load("/dev/hd*");
542 _cache_load("/dev/md*");
543 _cache_load("/dev/vd*");
544 _cache_load("/dev/mapper/*");
547 static int print_block_info(struct blkid_struct_probe *pr)
549 printf("%s:", pr->dev);
551 printf(" UUID=\"%s\"", pr->uuid);
554 printf(" LABEL=\"%s\"", pr->label);
557 printf(" NAME=\"%s\"", pr->name);
560 printf(" VERSION=\"%s\"", pr->version);
562 printf(" TYPE=\"%s\"\n", pr->id->name);
567 static int print_block_uci(struct blkid_struct_probe *pr)
569 if (!strcmp(pr->id->name, "swap")) {
570 printf("config 'swap'\n");
572 printf("config 'mount'\n");
573 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev));
576 printf("\toption\tuuid\t'%s'\n", pr->uuid);
578 printf("\toption\tdevice\t'%s'\n", pr->dev);
579 printf("\toption\tenabled\t'0'\n\n");
584 static struct blkid_struct_probe* find_block_info(char *uuid, char *label, char *path)
586 struct blkid_struct_probe *pr = NULL;
589 list_for_each_entry(pr, &devices, list)
590 if (!strcasecmp(pr->uuid, uuid))
594 list_for_each_entry(pr, &devices, list)
595 if (!strcmp(pr->label, label))
599 list_for_each_entry(pr, &devices, list)
600 if (!strcmp(basename(pr->dev), basename(path)))
606 static char* find_mount_point(char *block)
608 FILE *fp = fopen("/proc/mounts", "r");
609 static char line[256];
610 int len = strlen(block);
616 while (fgets(line, sizeof(line), fp)) {
617 if (!strncmp(line, block, len)) {
618 char *p = &line[len + 1];
619 char *t = strstr(p, " ");
636 static void mkdir_p(char *dir)
638 char *l = strrchr(dir, '/');
648 static void check_filesystem(struct blkid_struct_probe *pr)
652 char *e2fsck = "/usr/sbin/e2fsck";
654 /* UBIFS does not need stuff like fsck */
655 if (!strncmp(pr->id->name, "ubifs", 5))
658 if (strncmp(pr->id->name, "ext", 3)) {
659 ERROR("check_filesystem: %s is not supported\n", pr->id->name);
663 if (stat(e2fsck, &statbuf) < 0) {
664 ERROR("check_filesystem: %s not found\n", e2fsck);
670 execl(e2fsck, e2fsck, "-p", pr->dev, NULL);
672 } else if (pid > 0) {
675 waitpid(pid, &status, 0);
676 if (WEXITSTATUS(status))
677 ERROR("check_filesystem: %s returned %d\n", e2fsck, WEXITSTATUS(status));
681 static void handle_swapfiles(bool on)
685 struct blkid_struct_probe *pr;
687 vlist_for_each_element(&mounts, m, node)
689 if (m->type != TYPE_SWAP || !m->target)
692 if (stat(m->target, &s) || !S_ISREG(s.st_mode))
695 pr = _probe_path(m->target);
700 if (!strcmp(pr->id->name, "swap")) {
702 swapon(pr->dev, m->prio);
711 static int mount_device(struct blkid_struct_probe *pr, int hotplug)
719 device = basename(pr->dev);
721 if (!strcmp(pr->id->name, "swap")) {
722 if (hotplug && !auto_swap)
724 m = find_swap(pr->uuid, pr->label, device);
726 swapon(pr->dev, (m) ? (m->prio) : (0));
731 if (hotplug && !auto_mount)
734 if (find_mount_point(pr->dev)) {
735 ERROR("%s is already mounted\n", pr->dev);
739 m = find_block(pr->uuid, pr->label, device, NULL);
744 char *target = m->target;
749 snprintf(_target, sizeof(_target), "/mnt/%s", device);
755 check_filesystem(pr);
757 err = mount(pr->dev, target, pr->id->name, m->flags,
758 (m->options) ? (m->options) : (""));
760 ERROR("mounting %s (%s) as %s failed (%d) - %s\n",
761 pr->dev, pr->id->name, target, err, strerror(err));
763 handle_swapfiles(true);
768 char target[] = "/mnt/mmcblk123";
771 snprintf(target, sizeof(target), "/mnt/%s", device);
775 check_filesystem(pr);
777 err = mount(pr->dev, target, pr->id->name, 0, "");
779 ERROR("mounting %s (%s) as %s failed (%d) - %s\n",
780 pr->dev, pr->id->name, target, err, strerror(err));
782 handle_swapfiles(true);
789 static int umount_device(struct blkid_struct_probe *pr)
792 char *device = basename(pr->dev);
799 if (!strcmp(pr->id->name, "swap"))
802 mp = find_mount_point(pr->dev);
806 m = find_block(pr->uuid, pr->label, device, NULL);
810 err = umount2(mp, MNT_DETACH);
812 ERROR("unmounting %s (%s) failed (%d) - %s\n",
813 pr->dev, mp, err, strerror(err));
815 ERROR("unmounted %s (%s)\n",
821 static int main_hotplug(int argc, char **argv)
824 char *action, *device, *mount_point;
826 action = getenv("ACTION");
827 device = getenv("DEVNAME");
829 if (!action || !device)
831 snprintf(path, sizeof(path), "/dev/%s", device);
833 if (!strcmp(action, "remove")) {
835 mount_point = find_mount_point(path);
837 err = umount2(mount_point, MNT_DETACH);
840 ERROR("umount of %s failed (%d) - %s\n",
841 mount_point, err, strerror(err));
844 } else if (strcmp(action, "add")) {
845 ERROR("Unkown action %s\n", action);
850 if (config_load(NULL))
854 return mount_device(find_block_info(NULL, NULL, path), 1);
857 static int find_block_mtd(char *name, char *part, int plen)
859 FILE *fp = fopen("/proc/mtd", "r");
860 static char line[256];
866 while (!index && fgets(line, sizeof(line), fp)) {
867 if (strstr(line, name)) {
868 char *eol = strstr(line, ":");
883 snprintf(part, plen, "/dev/mtdblock%s", index);
889 static int find_ubi_vol(libubi_t libubi, char *name, int *dev_num, int *vol_id)
893 while (ubi_dev_present(libubi, dev))
895 struct ubi_dev_info dev_info;
896 struct ubi_vol_info vol_info;
898 if (ubi_get_dev_info1(libubi, dev++, &dev_info))
900 if (ubi_get_vol_info1_nm(libubi, dev_info.dev_num, name, &vol_info))
903 *dev_num = dev_info.dev_num;
904 *vol_id = vol_info.vol_id;
912 static int find_block_ubi(libubi_t libubi, char *name, char *part, int plen)
918 err = find_ubi_vol(libubi, name, &dev_num, &vol_id);
920 snprintf(part, plen, "/dev/ubi%d_%d", dev_num, vol_id);
925 static int find_block_ubi_RO(libubi_t libubi, char *name, char *part, int plen)
931 err = find_ubi_vol(libubi, name, &dev_num, &vol_id);
933 snprintf(part, plen, "/dev/ubiblock%d_%d", dev_num, vol_id);
939 static int find_root_dev(char *buf, int len)
949 if (!(d = opendir("/dev")))
954 while ((e = readdir(d)) != NULL) {
955 snprintf(buf, len, "/dev/%s", e->d_name);
957 if (stat(buf, &s) || s.st_rdev != root)
968 static int check_extroot(char *path)
970 struct blkid_struct_probe *pr = NULL;
974 if (find_block_mtd("rootfs", fs, sizeof(fs))) {
978 libubi = libubi_open();
979 err = find_block_ubi_RO(libubi, "rootfs", fs, sizeof(fs));
980 libubi_close(libubi);
985 if (find_block_mtd("rootfs", fs, sizeof(fs))) {
986 if (find_root_dev(fs, sizeof(fs)))
991 list_for_each_entry(pr, &devices, list) {
992 if (!strcmp(pr->dev, fs)) {
996 char uuid[64] = { 0 };
998 snprintf(tag, sizeof(tag), "%s/etc", path);
1002 snprintf(tag, sizeof(tag), "%s/etc/.extroot-uuid", path);
1003 if (stat(tag, &s)) {
1004 fp = fopen(tag, "w+");
1006 ERROR("extroot: failed to write uuid tag file\n");
1007 /* return 0 to continue boot regardless of error */
1010 fputs(pr->uuid, fp);
1015 fp = fopen(tag, "r");
1017 ERROR("extroot: failed to open uuid tag file\n");
1021 fgets(uuid, sizeof(uuid), fp);
1023 if (!strcasecmp(uuid, pr->uuid))
1025 ERROR("extroot: uuid tag does not match rom uuid\n");
1032 * Read info about extroot from UCI (using prefix) and mount it.
1034 static int mount_extroot(char *cfg)
1036 char overlay[] = "/tmp/extroot/overlay";
1037 char mnt[] = "/tmp/extroot/mnt";
1039 struct blkid_struct_probe *pr;
1043 /* Load @cfg/etc/config/fstab */
1044 if (config_load(cfg))
1047 /* See if there is extroot-specific mount config */
1048 m = find_block(NULL, NULL, NULL, "/");
1050 m = find_block(NULL, NULL, NULL, "/overlay");
1052 if (!m || !m->extroot)
1054 ERROR("extroot: no root or overlay mount defined\n");
1058 /* Find block device pointed by the mount config */
1059 pr = find_block_info(m->uuid, m->label, m->device);
1061 if (!pr && delay_root){
1062 ERROR("extroot: is not ready yet, retrying in %u seconds\n", delay_root);
1066 pr = find_block_info(m->uuid, m->label, m->device);
1069 if (strncmp(pr->id->name, "ext", 3) &&
1070 strncmp(pr->id->name, "ubifs", 5)) {
1071 ERROR("extroot: %s is not supported, try ext4\n", pr->id->name);
1079 check_filesystem(pr);
1081 err = mount(pr->dev, path, pr->id->name, 0, (m->options) ? (m->options) : (""));
1084 ERROR("mounting %s (%s) as %s failed (%d) - %s\n",
1085 pr->dev, pr->id->name, path, err, strerror(err));
1086 } else if (m->overlay) {
1087 err = check_extroot(path);
1092 ERROR("extroot: cannot find block device\n");
1098 static int main_extroot(int argc, char **argv)
1100 struct blkid_struct_probe *pr;
1101 char blkdev_path[32] = { 0 };
1103 #ifdef UBIFS_EXTROOT
1107 if (!getenv("PREINIT"))
1111 fprintf(stderr, "Usage: block extroot mountpoint\n");
1121 * Look for "rootfs_data". We will want to mount it and check for
1122 * extroot configuration.
1125 /* Start with looking for MTD partition */
1126 find_block_mtd("rootfs_data", blkdev_path, sizeof(blkdev_path));
1127 if (blkdev_path[0]) {
1128 pr = find_block_info(NULL, NULL, blkdev_path);
1129 if (pr && !strcmp(pr->id->name, "jffs2")) {
1130 char cfg[] = "/tmp/jffs_cfg";
1133 * Mount MTD part and try extroot (using
1134 * /etc/config/fstab from that partition)
1137 if (!mount(blkdev_path, cfg, "jffs2", MS_NOATIME, NULL)) {
1138 err = mount_extroot(cfg);
1139 umount2(cfg, MNT_DETACH);
1142 rmdir("/tmp/overlay");
1148 #ifdef UBIFS_EXTROOT
1149 /* ... but it also could be an UBI volume */
1150 memset(blkdev_path, 0, sizeof(blkdev_path));
1151 libubi = libubi_open();
1152 find_block_ubi(libubi, "rootfs_data", blkdev_path, sizeof(blkdev_path));
1153 libubi_close(libubi);
1154 if (blkdev_path[0]) {
1155 char cfg[] = "/tmp/ubifs_cfg";
1157 /* Mount volume and try extroot (using fstab from that vol) */
1159 if (!mount(blkdev_path, cfg, "ubifs", MS_NOATIME, NULL)) {
1160 err = mount_extroot(cfg);
1161 umount2(cfg, MNT_DETACH);
1164 rmdir("/tmp/overlay");
1170 return mount_extroot(NULL);
1173 static int main_mount(int argc, char **argv)
1175 struct blkid_struct_probe *pr;
1177 if (config_load(NULL))
1181 list_for_each_entry(pr, &devices, list)
1182 mount_device(pr, 0);
1184 handle_swapfiles(true);
1189 static int main_umount(int argc, char **argv)
1191 struct blkid_struct_probe *pr;
1193 if (config_load(NULL))
1196 handle_swapfiles(false);
1199 list_for_each_entry(pr, &devices, list)
1205 static int main_detect(int argc, char **argv)
1207 struct blkid_struct_probe *pr;
1210 printf("config 'global'\n");
1211 printf("\toption\tanon_swap\t'0'\n");
1212 printf("\toption\tanon_mount\t'0'\n");
1213 printf("\toption\tauto_swap\t'1'\n");
1214 printf("\toption\tauto_mount\t'1'\n");
1215 printf("\toption\tdelay_root\t'5'\n");
1216 printf("\toption\tcheck_fs\t'0'\n\n");
1217 list_for_each_entry(pr, &devices, list)
1218 print_block_uci(pr);
1223 static int main_info(int argc, char **argv)
1226 struct blkid_struct_probe *pr;
1230 list_for_each_entry(pr, &devices, list)
1231 print_block_info(pr);
1236 for (i = 2; i < argc; i++) {
1239 if (stat(argv[i], &s)) {
1240 ERROR("failed to stat %s\n", argv[i]);
1243 if (!S_ISBLK(s.st_mode)) {
1244 ERROR("%s is not a block device\n", argv[i]);
1247 pr = find_block_info(NULL, NULL, argv[i]);
1249 print_block_info(pr);
1255 static int swapon_usage(void)
1257 fprintf(stderr, "Usage: swapon [-s] [-a] [[-p pri] DEVICE]\n\n"
1258 "\tStart swapping on [DEVICE]\n"
1259 " -a\tStart swapping on all swap devices\n"
1260 " -p pri\tSet priority of swap device\n"
1261 " -s\tShow summary\n");
1265 static int main_swapon(int argc, char **argv)
1271 struct blkid_struct_probe *pr;
1277 while ((ch = getopt(argc, argv, "ap:s")) != -1) {
1280 fp = fopen("/proc/swaps", "r");
1284 ERROR("failed to open /proc/swaps\n");
1287 while (getline(&lineptr, &s, fp) > 0)
1295 list_for_each_entry(pr, &devices, list) {
1296 if (strcmp(pr->id->name, "swap"))
1298 if (swapon(pr->dev, 0))
1299 ERROR("failed to swapon %s\n", pr->dev);
1305 flags = ((pri << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
1308 return swapon_usage();
1313 if (optind != (argc - 1))
1314 return swapon_usage();
1316 if (stat(argv[optind], &st) || (!S_ISBLK(st.st_mode) && !S_ISREG(st.st_mode))) {
1317 ERROR("%s is not a block device or file\n", argv[optind]);
1320 err = swapon(argv[optind], flags);
1322 ERROR("failed to swapon %s (%d)\n", argv[optind], err);
1329 static int main_swapoff(int argc, char **argv)
1332 ERROR("Usage: swapoff [-a] [DEVICE]\n\n"
1333 "\tStop swapping on DEVICE\n"
1334 " -a\tStop swapping on all swap devices\n");
1338 if (!strcmp(argv[1], "-a")) {
1339 FILE *fp = fopen("/proc/swaps", "r");
1343 ERROR("failed to open /proc/swaps\n");
1346 fgets(line, sizeof(line), fp);
1347 while (fgets(line, sizeof(line), fp)) {
1348 char *end = strchr(line, ' ');
1354 err = swapoff(line);
1356 ERROR("failed to swapoff %s (%d)\n", line, err);
1363 if (stat(argv[1], &s) || (!S_ISBLK(s.st_mode) && !S_ISREG(s.st_mode))) {
1364 ERROR("%s is not a block device or file\n", argv[1]);
1367 err = swapoff(argv[1]);
1369 ERROR("fsiled to swapoff %s (%d)\n", argv[1], err);
1377 int main(int argc, char **argv)
1379 char *base = basename(*argv);
1383 if (!strcmp(base, "swapon"))
1384 return main_swapon(argc, argv);
1386 if (!strcmp(base, "swapoff"))
1387 return main_swapoff(argc, argv);
1389 if ((argc > 1) && !strcmp(base, "block")) {
1390 if (!strcmp(argv[1], "info"))
1391 return main_info(argc, argv);
1393 if (!strcmp(argv[1], "detect"))
1394 return main_detect(argc, argv);
1396 if (!strcmp(argv[1], "hotplug"))
1397 return main_hotplug(argc, argv);
1399 if (!strcmp(argv[1], "extroot"))
1400 return main_extroot(argc, argv);
1402 if (!strcmp(argv[1], "mount"))
1403 return main_mount(argc, argv);
1405 if (!strcmp(argv[1], "umount"))
1406 return main_umount(argc, argv);
1409 fprintf(stderr, "Usage: block <info|mount|umount|detect>\n");