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.
25 #include <sys/types.h>
27 #include <sys/mount.h>
33 #include <libubox/list.h>
34 #include <libubox/vlist.h>
35 #include <libubox/blobmsg_json.h>
36 #include <libubox/avl-cmp.h>
38 #include "libblkid-tiny/libblkid-tiny.h"
41 #include "libubi/libubi.h"
44 #define ERROR(fmt, ...) do { \
45 syslog(LOG_ERR, fmt, ## __VA_ARGS__); \
46 fprintf(stderr, "block: "fmt, ## __VA_ARGS__); \
55 struct vlist_node node;
71 static struct vlist_tree mounts;
72 static struct blob_buf b;
73 static LIST_HEAD(devices);
74 static int anon_mount, anon_swap, auto_mount, auto_swap, check_fs;
75 static unsigned int delay_root;
87 static const struct blobmsg_policy config_policy[__CFG_MAX] = {
88 [CFG_ANON_SWAP] = { .name = "anon_swap", .type = BLOBMSG_TYPE_INT32 },
89 [CFG_ANON_MOUNT] = { .name = "anon_mount", .type = BLOBMSG_TYPE_INT32 },
90 [CFG_AUTO_SWAP] = { .name = "auto_swap", .type = BLOBMSG_TYPE_INT32 },
91 [CFG_AUTO_MOUNT] = { .name = "auto_mount", .type = BLOBMSG_TYPE_INT32 },
92 [CFG_DELAY_ROOT] = { .name = "delay_root", .type = BLOBMSG_TYPE_INT32 },
93 [CFG_CHECK_FS] = { .name = "check_fs", .type = BLOBMSG_TYPE_INT32 },
106 static const struct uci_blob_param_list config_attr_list = {
107 .n_params = __CFG_MAX,
108 .params = config_policy,
111 static const struct blobmsg_policy mount_policy[__MOUNT_MAX] = {
112 [MOUNT_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING },
113 [MOUNT_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING },
114 [MOUNT_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
115 [MOUNT_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
116 [MOUNT_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_STRING },
117 [MOUNT_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
120 static const struct uci_blob_param_list mount_attr_list = {
121 .n_params = __MOUNT_MAX,
122 .params = mount_policy,
134 static const struct blobmsg_policy swap_policy[__SWAP_MAX] = {
135 [SWAP_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
136 [SWAP_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING },
137 [SWAP_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING },
138 [SWAP_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
139 [SWAP_PRIO] = { .name = "priority", .type = BLOBMSG_TYPE_INT32 },
142 static const struct uci_blob_param_list swap_attr_list = {
143 .n_params = __SWAP_MAX,
144 .params = swap_policy,
153 # define MS_DIRSYNC (1 << 7)
157 # define MS_RELATIME (1 << 21)
160 #ifndef MS_STRICTATIME
161 # define MS_STRICTATIME (1 << 24)
164 static const struct mount_flag mount_flags[] = {
165 { "sync", MS_SYNCHRONOUS },
166 { "async", ~MS_SYNCHRONOUS },
167 { "dirsync", MS_DIRSYNC },
168 { "mand", MS_MANDLOCK },
169 { "nomand", ~MS_MANDLOCK },
170 { "atime", ~MS_NOATIME },
171 { "noatime", MS_NOATIME },
172 { "dev", ~MS_NODEV },
173 { "nodev", MS_NODEV },
174 { "diratime", ~MS_NODIRATIME },
175 { "nodiratime", MS_NODIRATIME },
176 { "exec", ~MS_NOEXEC },
177 { "noexec", MS_NOEXEC },
178 { "suid", ~MS_NOSUID },
179 { "nosuid", MS_NOSUID },
180 { "rw", ~MS_RDONLY },
182 { "relatime", MS_RELATIME },
183 { "norelatime", ~MS_RELATIME },
184 { "strictatime", MS_STRICTATIME },
187 static char *blobmsg_get_strdup(struct blob_attr *attr)
192 return strdup(blobmsg_get_string(attr));
195 static char *blobmsg_get_basename(struct blob_attr *attr)
200 return strdup(basename(blobmsg_get_string(attr)));
203 static void parse_mount_options(struct mount *m, char *optstr)
207 char *p, *opts, *last;
212 if (!optstr || !*optstr)
215 m->options = opts = calloc(1, strlen(optstr) + 1);
228 for (i = 0, is_flag = false; i < ARRAY_SIZE(mount_flags); i++) {
229 if (!strcmp(last, mount_flags[i].name)) {
230 if (mount_flags[i].flag < 0)
231 m->flags &= (uint32_t)mount_flags[i].flag;
233 m->flags |= (uint32_t)mount_flags[i].flag;
240 opts += sprintf(opts, "%s%s", (opts > m->options) ? "," : "", last);
249 static int mount_add(struct uci_section *s)
251 struct blob_attr *tb[__MOUNT_MAX] = { 0 };
254 blob_buf_init(&b, 0);
255 uci_to_blob(&b, s, &mount_attr_list);
256 blobmsg_parse(mount_policy, __MOUNT_MAX, tb, blob_data(b.head), blob_len(b.head));
258 if (!tb[MOUNT_LABEL] && !tb[MOUNT_UUID] && !tb[MOUNT_DEVICE])
261 if (tb[MOUNT_ENABLE] && !blobmsg_get_u32(tb[MOUNT_ENABLE]))
264 m = malloc(sizeof(struct mount));
265 m->type = TYPE_MOUNT;
266 m->uuid = blobmsg_get_strdup(tb[MOUNT_UUID]);
267 m->label = blobmsg_get_strdup(tb[MOUNT_LABEL]);
268 m->target = blobmsg_get_strdup(tb[MOUNT_TARGET]);
269 m->device = blobmsg_get_basename(tb[MOUNT_DEVICE]);
271 parse_mount_options(m, blobmsg_get_strdup(tb[MOUNT_OPTIONS]));
273 m->overlay = m->extroot = 0;
274 if (m->target && !strcmp(m->target, "/"))
276 if (m->target && !strcmp(m->target, "/overlay"))
277 m->extroot = m->overlay = 1;
280 vlist_add(&mounts, &m->node, m->uuid);
282 vlist_add(&mounts, &m->node, m->label);
284 vlist_add(&mounts, &m->node, m->device);
289 static int swap_add(struct uci_section *s)
291 struct blob_attr *tb[__SWAP_MAX] = { 0 };
294 blob_buf_init(&b, 0);
295 uci_to_blob(&b, s, &swap_attr_list);
296 blobmsg_parse(swap_policy, __SWAP_MAX, tb, blob_data(b.head), blob_len(b.head));
298 if (!tb[SWAP_UUID] && !tb[SWAP_LABEL] && !tb[SWAP_DEVICE])
301 m = malloc(sizeof(struct mount));
302 memset(m, 0, sizeof(struct mount));
304 m->uuid = blobmsg_get_strdup(tb[SWAP_UUID]);
305 m->label = blobmsg_get_strdup(tb[SWAP_LABEL]);
306 m->device = blobmsg_get_basename(tb[SWAP_DEVICE]);
308 m->prio = blobmsg_get_u32(tb[SWAP_PRIO]);
310 m->prio = ((m->prio << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
312 if ((!tb[SWAP_ENABLE]) || blobmsg_get_u32(tb[SWAP_ENABLE])) {
313 /* store complete swap path */
315 m->target = blobmsg_get_strdup(tb[SWAP_DEVICE]);
318 vlist_add(&mounts, &m->node, m->uuid);
320 vlist_add(&mounts, &m->node, m->label);
322 vlist_add(&mounts, &m->node, m->device);
328 static int global_add(struct uci_section *s)
330 struct blob_attr *tb[__CFG_MAX] = { 0 };
332 blob_buf_init(&b, 0);
333 uci_to_blob(&b, s, &config_attr_list);
334 blobmsg_parse(config_policy, __CFG_MAX, tb, blob_data(b.head), blob_len(b.head));
336 if ((tb[CFG_ANON_MOUNT]) && blobmsg_get_u32(tb[CFG_ANON_MOUNT]))
338 if ((tb[CFG_ANON_SWAP]) && blobmsg_get_u32(tb[CFG_ANON_SWAP]))
341 if ((tb[CFG_AUTO_MOUNT]) && blobmsg_get_u32(tb[CFG_AUTO_MOUNT]))
343 if ((tb[CFG_AUTO_SWAP]) && blobmsg_get_u32(tb[CFG_AUTO_SWAP]))
346 if (tb[CFG_DELAY_ROOT])
347 delay_root = blobmsg_get_u32(tb[CFG_DELAY_ROOT]);
349 if ((tb[CFG_CHECK_FS]) && blobmsg_get_u32(tb[CFG_CHECK_FS]))
355 static struct mount* find_swap(const char *uuid, const char *label, const char *device)
359 vlist_for_each_element(&mounts, m, node) {
360 if (m->type != TYPE_SWAP)
362 if (uuid && m->uuid && !strcasecmp(m->uuid, uuid))
364 if (label && m->label && !strcmp(m->label, label))
366 if (device && m->device && !strcmp(m->device, device))
373 static struct mount* find_block(const char *uuid, const char *label, const char *device,
378 vlist_for_each_element(&mounts, m, node) {
379 if (m->type != TYPE_MOUNT)
381 if (m->uuid && uuid && !strcasecmp(m->uuid, uuid))
383 if (m->label && label && !strcmp(m->label, label))
385 if (m->target && target && !strcmp(m->target, target))
387 if (m->device && device && !strcmp(m->device, device))
394 static void mounts_update(struct vlist_tree *tree, struct vlist_node *node_new,
395 struct vlist_node *node_old)
399 static int config_load(char *cfg)
401 struct uci_context *ctx;
402 struct uci_package *pkg;
403 struct uci_element *e;
405 vlist_init(&mounts, avl_strcmp, mounts_update);
407 ctx = uci_alloc_context();
410 snprintf(path, 32, "%s/etc/config", cfg);
411 uci_set_confdir(ctx, path);
414 if (uci_load(ctx, "fstab", &pkg)) {
415 uci_set_confdir(ctx, "/etc/config");
416 if (uci_load(ctx, "fstab", &pkg)) {
418 uci_get_errorstr(ctx, &err, "fstab");
419 ERROR("extroot: failed to load %s/etc/config/%s\n",
420 cfg ? cfg : "", err);
426 vlist_update(&mounts);
427 uci_foreach_element(&pkg->sections, e) {
428 struct uci_section *s = uci_to_section(e);
430 if (!strcmp(s->type, "mount"))
432 if (!strcmp(s->type, "swap"))
434 if (!strcmp(s->type, "global"))
437 vlist_flush(&mounts);
442 static struct blkid_struct_probe* _probe_path(char *path)
444 struct blkid_struct_probe *pr;
446 pr = malloc(sizeof(*pr));
451 memset(pr, 0, sizeof(*pr));
452 probe_block(path, pr);
454 if (pr->err || !pr->id) {
462 static int _cache_load(const char *path)
464 int gl_flags = GLOB_NOESCAPE | GLOB_MARK;
468 if (glob(path, gl_flags, NULL, &gl) < 0)
471 for (j = 0; j < gl.gl_pathc; j++) {
472 struct blkid_struct_probe *pr = _probe_path(gl.gl_pathv[j]);
474 list_add_tail(&pr->list, &devices);
482 static void cache_load(int mtd)
485 _cache_load("/dev/mtdblock*");
486 _cache_load("/dev/ubiblock*");
487 _cache_load("/dev/ubi?*_?*");
489 _cache_load("/dev/mmcblk*");
490 _cache_load("/dev/sd*");
491 _cache_load("/dev/hd*");
492 _cache_load("/dev/md*");
493 _cache_load("/dev/vd*");
494 _cache_load("/dev/mapper/*");
497 static int print_block_info(struct blkid_struct_probe *pr)
499 printf("%s:", pr->dev);
501 printf(" UUID=\"%s\"", pr->uuid);
504 printf(" LABEL=\"%s\"", pr->label);
507 printf(" NAME=\"%s\"", pr->name);
510 printf(" VERSION=\"%s\"", pr->version);
512 printf(" TYPE=\"%s\"\n", pr->id->name);
517 static int print_block_uci(struct blkid_struct_probe *pr)
519 if (!strcmp(pr->id->name, "swap")) {
520 printf("config 'swap'\n");
522 printf("config 'mount'\n");
523 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev));
526 printf("\toption\tuuid\t'%s'\n", pr->uuid);
528 printf("\toption\tdevice\t'%s'\n", pr->dev);
529 printf("\toption\tenabled\t'0'\n\n");
534 static struct blkid_struct_probe* find_block_info(char *uuid, char *label, char *path)
536 struct blkid_struct_probe *pr = NULL;
539 list_for_each_entry(pr, &devices, list)
540 if (!strcasecmp(pr->uuid, uuid))
544 list_for_each_entry(pr, &devices, list)
545 if (!strcmp(pr->label, label))
549 list_for_each_entry(pr, &devices, list)
550 if (!strcmp(basename(pr->dev), basename(path)))
556 static char* find_mount_point(char *block)
558 FILE *fp = fopen("/proc/mounts", "r");
559 static char line[256];
560 int len = strlen(block);
566 while (fgets(line, sizeof(line), fp)) {
567 if (!strncmp(line, block, len)) {
568 char *p = &line[len + 1];
569 char *t = strstr(p, " ");
586 static void mkdir_p(char *dir)
588 char *l = strrchr(dir, '/');
598 static void check_filesystem(struct blkid_struct_probe *pr)
602 char *e2fsck = "/usr/sbin/e2fsck";
604 /* UBIFS does not need stuff like fsck */
605 if (!strncmp(pr->id->name, "ubifs", 5))
608 if (strncmp(pr->id->name, "ext", 3)) {
609 ERROR("check_filesystem: %s is not supported\n", pr->id->name);
613 if (stat(e2fsck, &statbuf) < 0) {
614 ERROR("check_filesystem: %s not found\n", e2fsck);
620 execl(e2fsck, e2fsck, "-p", pr->dev, NULL);
622 } else if (pid > 0) {
625 waitpid(pid, &status, 0);
626 if (WEXITSTATUS(status))
627 ERROR("check_filesystem: %s returned %d\n", e2fsck, WEXITSTATUS(status));
631 static void handle_swapfiles(bool on)
635 struct blkid_struct_probe *pr;
637 vlist_for_each_element(&mounts, m, node)
639 if (m->type != TYPE_SWAP || !m->target)
642 if (stat(m->target, &s) || !S_ISREG(s.st_mode))
645 pr = _probe_path(m->target);
650 if (!strcmp(pr->id->name, "swap")) {
652 swapon(pr->dev, m->prio);
661 static int mount_device(struct blkid_struct_probe *pr, int hotplug)
669 device = basename(pr->dev);
671 if (!strcmp(pr->id->name, "swap")) {
672 if (hotplug && !auto_swap)
674 m = find_swap(pr->uuid, pr->label, device);
676 swapon(pr->dev, (m) ? (m->prio) : (0));
681 if (hotplug && !auto_mount)
684 if (find_mount_point(pr->dev)) {
685 ERROR("%s is already mounted\n", pr->dev);
689 m = find_block(pr->uuid, pr->label, device, NULL);
694 char *target = m->target;
699 snprintf(_target, sizeof(_target), "/mnt/%s", device);
705 check_filesystem(pr);
707 err = mount(pr->dev, target, pr->id->name, m->flags,
708 (m->options) ? (m->options) : (""));
710 ERROR("mounting %s (%s) as %s failed (%d) - %s\n",
711 pr->dev, pr->id->name, target, err, strerror(err));
713 handle_swapfiles(true);
718 char target[] = "/mnt/mmcblk123";
721 snprintf(target, sizeof(target), "/mnt/%s", device);
725 check_filesystem(pr);
727 err = mount(pr->dev, target, pr->id->name, 0, "");
729 ERROR("mounting %s (%s) as %s failed (%d) - %s\n",
730 pr->dev, pr->id->name, target, err, strerror(err));
732 handle_swapfiles(true);
739 static int umount_device(struct blkid_struct_probe *pr)
742 char *device = basename(pr->dev);
749 if (!strcmp(pr->id->name, "swap"))
752 mp = find_mount_point(pr->dev);
756 m = find_block(pr->uuid, pr->label, device, NULL);
760 err = umount2(mp, MNT_DETACH);
762 ERROR("unmounting %s (%s) failed (%d) - %s\n",
763 pr->dev, mp, err, strerror(err));
765 ERROR("unmounted %s (%s)\n",
771 static int main_hotplug(int argc, char **argv)
774 char *action, *device, *mount_point;
776 action = getenv("ACTION");
777 device = getenv("DEVNAME");
779 if (!action || !device)
781 snprintf(path, sizeof(path), "/dev/%s", device);
783 if (!strcmp(action, "remove")) {
785 mount_point = find_mount_point(path);
787 err = umount2(mount_point, MNT_DETACH);
790 ERROR("umount of %s failed (%d) - %s\n",
791 mount_point, err, strerror(err));
794 } else if (strcmp(action, "add")) {
795 ERROR("Unkown action %s\n", action);
800 if (config_load(NULL))
804 return mount_device(find_block_info(NULL, NULL, path), 1);
807 static int find_block_mtd(char *name, char *part, int plen)
809 FILE *fp = fopen("/proc/mtd", "r");
810 static char line[256];
816 while (!index && fgets(line, sizeof(line), fp)) {
817 if (strstr(line, name)) {
818 char *eol = strstr(line, ":");
833 snprintf(part, plen, "/dev/mtdblock%s", index);
839 static int find_ubi_vol(libubi_t libubi, char *name, int *dev_num, int *vol_id)
843 while (ubi_dev_present(libubi, dev))
845 struct ubi_dev_info dev_info;
846 struct ubi_vol_info vol_info;
848 if (ubi_get_dev_info1(libubi, dev++, &dev_info))
850 if (ubi_get_vol_info1_nm(libubi, dev_info.dev_num, name, &vol_info))
853 *dev_num = dev_info.dev_num;
854 *vol_id = vol_info.vol_id;
862 static int find_block_ubi(libubi_t libubi, char *name, char *part, int plen)
868 err = find_ubi_vol(libubi, name, &dev_num, &vol_id);
870 snprintf(part, plen, "/dev/ubi%d_%d", dev_num, vol_id);
875 static int find_block_ubi_RO(libubi_t libubi, char *name, char *part, int plen)
881 err = find_ubi_vol(libubi, name, &dev_num, &vol_id);
883 snprintf(part, plen, "/dev/ubiblock%d_%d", dev_num, vol_id);
889 static int find_root_dev(char *buf, int len)
899 if (!(d = opendir("/dev")))
904 while ((e = readdir(d)) != NULL) {
905 snprintf(buf, len, "/dev/%s", e->d_name);
907 if (stat(buf, &s) || s.st_rdev != root)
918 static int check_extroot(char *path)
920 struct blkid_struct_probe *pr = NULL;
924 if (find_block_mtd("rootfs", fs, sizeof(fs))) {
928 libubi = libubi_open();
929 err = find_block_ubi_RO(libubi, "rootfs", fs, sizeof(fs));
930 libubi_close(libubi);
935 if (find_block_mtd("rootfs", fs, sizeof(fs))) {
936 if (find_root_dev(fs, sizeof(fs)))
941 list_for_each_entry(pr, &devices, list) {
942 if (!strcmp(pr->dev, fs)) {
946 char uuid[64] = { 0 };
948 snprintf(tag, sizeof(tag), "%s/etc", path);
952 snprintf(tag, sizeof(tag), "%s/etc/.extroot-uuid", path);
954 fp = fopen(tag, "w+");
956 ERROR("extroot: failed to write uuid tag file\n");
957 /* return 0 to continue boot regardless of error */
965 fp = fopen(tag, "r");
967 ERROR("extroot: failed to open uuid tag file\n");
971 fgets(uuid, sizeof(uuid), fp);
973 if (!strcasecmp(uuid, pr->uuid))
975 ERROR("extroot: uuid tag does not match rom uuid\n");
982 * Read info about extroot from UCI (using prefix) and mount it.
984 static int mount_extroot(char *cfg)
986 char overlay[] = "/tmp/extroot/overlay";
987 char mnt[] = "/tmp/extroot/mnt";
989 struct blkid_struct_probe *pr;
993 /* Load @cfg/etc/config/fstab */
994 if (config_load(cfg))
997 /* See if there is extroot-specific mount config */
998 m = find_block(NULL, NULL, NULL, "/");
1000 m = find_block(NULL, NULL, NULL, "/overlay");
1002 if (!m || !m->extroot)
1004 ERROR("extroot: no root or overlay mount defined\n");
1008 /* Find block device pointed by the mount config */
1009 pr = find_block_info(m->uuid, m->label, m->device);
1011 if (!pr && delay_root){
1012 ERROR("extroot: is not ready yet, retrying in %u seconds\n", delay_root);
1016 pr = find_block_info(m->uuid, m->label, m->device);
1019 if (strncmp(pr->id->name, "ext", 3) &&
1020 strncmp(pr->id->name, "ubifs", 5)) {
1021 ERROR("extroot: %s is not supported, try ext4\n", pr->id->name);
1029 check_filesystem(pr);
1031 err = mount(pr->dev, path, pr->id->name, 0, (m->options) ? (m->options) : (""));
1034 ERROR("mounting %s (%s) as %s failed (%d) - %s\n",
1035 pr->dev, pr->id->name, path, err, strerror(err));
1036 } else if (m->overlay) {
1037 err = check_extroot(path);
1042 ERROR("extroot: cannot find block device\n");
1048 static int main_extroot(int argc, char **argv)
1050 struct blkid_struct_probe *pr;
1051 char blkdev_path[32] = { 0 };
1053 #ifdef UBIFS_EXTROOT
1057 if (!getenv("PREINIT"))
1061 fprintf(stderr, "Usage: block extroot mountpoint\n");
1069 * Look for "rootfs_data". We will want to mount it and check for
1070 * extroot configuration.
1073 /* Start with looking for MTD partition */
1074 find_block_mtd("rootfs_data", blkdev_path, sizeof(blkdev_path));
1075 if (blkdev_path[0]) {
1076 pr = find_block_info(NULL, NULL, blkdev_path);
1077 if (pr && !strcmp(pr->id->name, "jffs2")) {
1078 char cfg[] = "/tmp/jffs_cfg";
1081 * Mount MTD part and try extroot (using
1082 * /etc/config/fstab from that partition)
1085 if (!mount(blkdev_path, cfg, "jffs2", MS_NOATIME, NULL)) {
1086 err = mount_extroot(cfg);
1087 umount2(cfg, MNT_DETACH);
1090 rmdir("/tmp/overlay");
1096 #ifdef UBIFS_EXTROOT
1097 /* ... but it also could be an UBI volume */
1098 memset(blkdev_path, 0, sizeof(blkdev_path));
1099 libubi = libubi_open();
1100 find_block_ubi(libubi, "rootfs_data", blkdev_path, sizeof(blkdev_path));
1101 libubi_close(libubi);
1102 if (blkdev_path[0]) {
1103 char cfg[] = "/tmp/ubifs_cfg";
1105 /* Mount volume and try extroot (using fstab from that vol) */
1107 if (!mount(blkdev_path, cfg, "ubifs", MS_NOATIME, NULL)) {
1108 err = mount_extroot(cfg);
1109 umount2(cfg, MNT_DETACH);
1112 rmdir("/tmp/overlay");
1118 return mount_extroot(NULL);
1121 static int main_mount(int argc, char **argv)
1123 struct blkid_struct_probe *pr;
1125 if (config_load(NULL))
1129 list_for_each_entry(pr, &devices, list)
1130 mount_device(pr, 0);
1132 handle_swapfiles(true);
1137 static int main_umount(int argc, char **argv)
1139 struct blkid_struct_probe *pr;
1141 if (config_load(NULL))
1144 handle_swapfiles(false);
1147 list_for_each_entry(pr, &devices, list)
1153 static int main_detect(int argc, char **argv)
1155 struct blkid_struct_probe *pr;
1158 printf("config 'global'\n");
1159 printf("\toption\tanon_swap\t'0'\n");
1160 printf("\toption\tanon_mount\t'0'\n");
1161 printf("\toption\tauto_swap\t'1'\n");
1162 printf("\toption\tauto_mount\t'1'\n");
1163 printf("\toption\tdelay_root\t'5'\n");
1164 printf("\toption\tcheck_fs\t'0'\n\n");
1165 list_for_each_entry(pr, &devices, list)
1166 print_block_uci(pr);
1171 static int main_info(int argc, char **argv)
1174 struct blkid_struct_probe *pr;
1178 list_for_each_entry(pr, &devices, list)
1179 print_block_info(pr);
1184 for (i = 2; i < argc; i++) {
1187 if (stat(argv[i], &s)) {
1188 ERROR("failed to stat %s\n", argv[i]);
1191 if (!S_ISBLK(s.st_mode)) {
1192 ERROR("%s is not a block device\n", argv[i]);
1195 pr = find_block_info(NULL, NULL, argv[i]);
1197 print_block_info(pr);
1203 static int swapon_usage(void)
1205 fprintf(stderr, "Usage: swapon [-s] [-a] [[-p pri] DEVICE]\n\n"
1206 "\tStart swapping on [DEVICE]\n"
1207 " -a\tStart swapping on all swap devices\n"
1208 " -p pri\tSet priority of swap device\n"
1209 " -s\tShow summary\n");
1213 static int main_swapon(int argc, char **argv)
1219 struct blkid_struct_probe *pr;
1225 while ((ch = getopt(argc, argv, "ap:s")) != -1) {
1228 fp = fopen("/proc/swaps", "r");
1232 ERROR("failed to open /proc/swaps\n");
1235 while (getline(&lineptr, &s, fp) > 0)
1243 list_for_each_entry(pr, &devices, list) {
1244 if (strcmp(pr->id->name, "swap"))
1246 if (swapon(pr->dev, 0))
1247 ERROR("failed to swapon %s\n", pr->dev);
1253 flags = ((pri << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
1256 return swapon_usage();
1261 if (optind != (argc - 1))
1262 return swapon_usage();
1264 if (stat(argv[optind], &st) || (!S_ISBLK(st.st_mode) && !S_ISREG(st.st_mode))) {
1265 ERROR("%s is not a block device or file\n", argv[optind]);
1268 err = swapon(argv[optind], flags);
1270 ERROR("failed to swapon %s (%d)\n", argv[optind], err);
1277 static int main_swapoff(int argc, char **argv)
1280 ERROR("Usage: swapoff [-a] [DEVICE]\n\n"
1281 "\tStop swapping on DEVICE\n"
1282 " -a\tStop swapping on all swap devices\n");
1286 if (!strcmp(argv[1], "-a")) {
1287 FILE *fp = fopen("/proc/swaps", "r");
1291 ERROR("failed to open /proc/swaps\n");
1294 fgets(line, sizeof(line), fp);
1295 while (fgets(line, sizeof(line), fp)) {
1296 char *end = strchr(line, ' ');
1302 err = swapoff(line);
1304 ERROR("failed to swapoff %s (%d)\n", line, err);
1311 if (stat(argv[1], &s) || (!S_ISBLK(s.st_mode) && !S_ISREG(s.st_mode))) {
1312 ERROR("%s is not a block device or file\n", argv[1]);
1315 err = swapoff(argv[1]);
1317 ERROR("fsiled to swapoff %s (%d)\n", argv[1], err);
1325 int main(int argc, char **argv)
1327 char *base = basename(*argv);
1331 if (!strcmp(base, "swapon"))
1332 return main_swapon(argc, argv);
1334 if (!strcmp(base, "swapoff"))
1335 return main_swapoff(argc, argv);
1337 if ((argc > 1) && !strcmp(base, "block")) {
1338 if (!strcmp(argv[1], "info"))
1339 return main_info(argc, argv);
1341 if (!strcmp(argv[1], "detect"))
1342 return main_detect(argc, argv);
1344 if (!strcmp(argv[1], "hotplug"))
1345 return main_hotplug(argc, argv);
1347 if (!strcmp(argv[1], "extroot"))
1348 return main_extroot(argc, argv);
1350 if (!strcmp(argv[1], "mount"))
1351 return main_mount(argc, argv);
1353 if (!strcmp(argv[1], "umount"))
1354 return main_umount(argc, argv);
1357 fprintf(stderr, "Usage: block <info|mount|umount|detect>\n");