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.
30 #include <sys/types.h>
32 #include <sys/mount.h>
40 #include <libubox/ulog.h>
41 #include <libubox/list.h>
42 #include <libubox/vlist.h>
43 #include <libubox/blobmsg_json.h>
44 #include <libubox/avl-cmp.h>
49 #include "libubi/libubi.h"
58 struct vlist_node node;
74 static struct vlist_tree mounts;
75 static struct blob_buf b;
76 static LIST_HEAD(devices);
77 static int anon_mount, anon_swap, auto_mount, auto_swap, check_fs;
78 static unsigned int delay_root;
90 static const struct blobmsg_policy config_policy[__CFG_MAX] = {
91 [CFG_ANON_SWAP] = { .name = "anon_swap", .type = BLOBMSG_TYPE_INT32 },
92 [CFG_ANON_MOUNT] = { .name = "anon_mount", .type = BLOBMSG_TYPE_INT32 },
93 [CFG_AUTO_SWAP] = { .name = "auto_swap", .type = BLOBMSG_TYPE_INT32 },
94 [CFG_AUTO_MOUNT] = { .name = "auto_mount", .type = BLOBMSG_TYPE_INT32 },
95 [CFG_DELAY_ROOT] = { .name = "delay_root", .type = BLOBMSG_TYPE_INT32 },
96 [CFG_CHECK_FS] = { .name = "check_fs", .type = BLOBMSG_TYPE_INT32 },
109 static const struct uci_blob_param_list config_attr_list = {
110 .n_params = __CFG_MAX,
111 .params = config_policy,
114 static const struct blobmsg_policy mount_policy[__MOUNT_MAX] = {
115 [MOUNT_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING },
116 [MOUNT_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING },
117 [MOUNT_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
118 [MOUNT_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
119 [MOUNT_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_STRING },
120 [MOUNT_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
123 static const struct uci_blob_param_list mount_attr_list = {
124 .n_params = __MOUNT_MAX,
125 .params = mount_policy,
137 static const struct blobmsg_policy swap_policy[__SWAP_MAX] = {
138 [SWAP_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
139 [SWAP_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING },
140 [SWAP_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING },
141 [SWAP_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
142 [SWAP_PRIO] = { .name = "priority", .type = BLOBMSG_TYPE_INT32 },
145 static const struct uci_blob_param_list swap_attr_list = {
146 .n_params = __SWAP_MAX,
147 .params = swap_policy,
155 static const struct mount_flag mount_flags[] = {
156 { "sync", MS_SYNCHRONOUS },
157 { "async", ~MS_SYNCHRONOUS },
158 { "dirsync", MS_DIRSYNC },
159 { "mand", MS_MANDLOCK },
160 { "nomand", ~MS_MANDLOCK },
161 { "atime", ~MS_NOATIME },
162 { "noatime", MS_NOATIME },
163 { "dev", ~MS_NODEV },
164 { "nodev", MS_NODEV },
165 { "diratime", ~MS_NODIRATIME },
166 { "nodiratime", MS_NODIRATIME },
167 { "exec", ~MS_NOEXEC },
168 { "noexec", MS_NOEXEC },
169 { "suid", ~MS_NOSUID },
170 { "nosuid", MS_NOSUID },
171 { "rw", ~MS_RDONLY },
173 { "relatime", MS_RELATIME },
174 { "norelatime", ~MS_RELATIME },
175 { "strictatime", MS_STRICTATIME },
176 { "acl", MS_POSIXACL },
177 { "noacl", ~MS_POSIXACL },
178 { "nouser_xattr", MS_NOUSER },
179 { "user_xattr", ~MS_NOUSER },
182 static char *blobmsg_get_strdup(struct blob_attr *attr)
187 return strdup(blobmsg_get_string(attr));
190 static char *blobmsg_get_basename(struct blob_attr *attr)
195 return strdup(basename(blobmsg_get_string(attr)));
198 static void parse_mount_options(struct mount *m, char *optstr)
202 char *p, *opts, *last;
207 if (!optstr || !*optstr)
210 m->options = opts = calloc(1, strlen(optstr) + 1);
223 for (i = 0, is_flag = false; i < ARRAY_SIZE(mount_flags); i++) {
224 if (!strcmp(last, mount_flags[i].name)) {
225 if (mount_flags[i].flag < 0)
226 m->flags &= (uint32_t)mount_flags[i].flag;
228 m->flags |= (uint32_t)mount_flags[i].flag;
235 opts += sprintf(opts, "%s%s", (opts > m->options) ? "," : "", last);
244 static int mount_add(struct uci_section *s)
246 struct blob_attr *tb[__MOUNT_MAX] = { 0 };
249 blob_buf_init(&b, 0);
250 uci_to_blob(&b, s, &mount_attr_list);
251 blobmsg_parse(mount_policy, __MOUNT_MAX, tb, blob_data(b.head), blob_len(b.head));
253 if (!tb[MOUNT_LABEL] && !tb[MOUNT_UUID] && !tb[MOUNT_DEVICE])
256 if (tb[MOUNT_ENABLE] && !blobmsg_get_u32(tb[MOUNT_ENABLE]))
259 m = malloc(sizeof(struct mount));
260 m->type = TYPE_MOUNT;
261 m->uuid = blobmsg_get_strdup(tb[MOUNT_UUID]);
262 m->label = blobmsg_get_strdup(tb[MOUNT_LABEL]);
263 m->target = blobmsg_get_strdup(tb[MOUNT_TARGET]);
264 m->device = blobmsg_get_basename(tb[MOUNT_DEVICE]);
266 parse_mount_options(m, blobmsg_get_strdup(tb[MOUNT_OPTIONS]));
268 m->overlay = m->extroot = 0;
269 if (m->target && !strcmp(m->target, "/"))
271 if (m->target && !strcmp(m->target, "/overlay"))
272 m->extroot = m->overlay = 1;
274 if (m->target && *m->target != '/') {
275 ULOG_WARN("ignoring mount section %s due to invalid target '%s'\n",
276 s->e.name, m->target);
282 vlist_add(&mounts, &m->node, m->uuid);
284 vlist_add(&mounts, &m->node, m->label);
286 vlist_add(&mounts, &m->node, m->device);
291 static int swap_add(struct uci_section *s)
293 struct blob_attr *tb[__SWAP_MAX] = { 0 };
296 blob_buf_init(&b, 0);
297 uci_to_blob(&b, s, &swap_attr_list);
298 blobmsg_parse(swap_policy, __SWAP_MAX, tb, blob_data(b.head), blob_len(b.head));
300 if (!tb[SWAP_UUID] && !tb[SWAP_LABEL] && !tb[SWAP_DEVICE])
303 m = malloc(sizeof(struct mount));
304 memset(m, 0, sizeof(struct mount));
306 m->uuid = blobmsg_get_strdup(tb[SWAP_UUID]);
307 m->label = blobmsg_get_strdup(tb[SWAP_LABEL]);
308 m->device = blobmsg_get_basename(tb[SWAP_DEVICE]);
310 m->prio = blobmsg_get_u32(tb[SWAP_PRIO]);
312 m->prio = ((m->prio << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
314 if ((!tb[SWAP_ENABLE]) || blobmsg_get_u32(tb[SWAP_ENABLE])) {
315 /* store complete swap path */
317 m->target = blobmsg_get_strdup(tb[SWAP_DEVICE]);
320 vlist_add(&mounts, &m->node, m->uuid);
322 vlist_add(&mounts, &m->node, m->label);
324 vlist_add(&mounts, &m->node, m->device);
330 static int global_add(struct uci_section *s)
332 struct blob_attr *tb[__CFG_MAX] = { 0 };
334 blob_buf_init(&b, 0);
335 uci_to_blob(&b, s, &config_attr_list);
336 blobmsg_parse(config_policy, __CFG_MAX, tb, blob_data(b.head), blob_len(b.head));
338 if ((tb[CFG_ANON_MOUNT]) && blobmsg_get_u32(tb[CFG_ANON_MOUNT]))
340 if ((tb[CFG_ANON_SWAP]) && blobmsg_get_u32(tb[CFG_ANON_SWAP]))
343 if ((tb[CFG_AUTO_MOUNT]) && blobmsg_get_u32(tb[CFG_AUTO_MOUNT]))
345 if ((tb[CFG_AUTO_SWAP]) && blobmsg_get_u32(tb[CFG_AUTO_SWAP]))
348 if (tb[CFG_DELAY_ROOT])
349 delay_root = blobmsg_get_u32(tb[CFG_DELAY_ROOT]);
351 if ((tb[CFG_CHECK_FS]) && blobmsg_get_u32(tb[CFG_CHECK_FS]))
357 static struct mount* find_swap(const char *uuid, const char *label, const char *device)
361 vlist_for_each_element(&mounts, m, node) {
362 if (m->type != TYPE_SWAP)
364 if (uuid && m->uuid && !strcasecmp(m->uuid, uuid))
366 if (label && m->label && !strcmp(m->label, label))
368 if (device && m->device && !strcmp(m->device, device))
375 static struct mount* find_block(const char *uuid, const char *label, const char *device,
380 vlist_for_each_element(&mounts, m, node) {
381 if (m->type != TYPE_MOUNT)
383 if (m->uuid && uuid && !strcasecmp(m->uuid, uuid))
385 if (m->label && label && !strcmp(m->label, label))
387 if (m->target && target && !strcmp(m->target, target))
389 if (m->device && device && !strcmp(m->device, device))
396 static void mounts_update(struct vlist_tree *tree, struct vlist_node *node_new,
397 struct vlist_node *node_old)
401 static struct uci_package * config_try_load(struct uci_context *ctx, char *path)
403 char *file = basename(path);
404 char *dir = dirname(path);
406 struct uci_package *pkg;
408 uci_set_confdir(ctx, dir);
409 ULOG_INFO("attempting to load %s/%s\n", dir, file);
411 if (uci_load(ctx, file, &pkg)) {
412 uci_get_errorstr(ctx, &err, file);
413 ULOG_ERR("unable to load configuration (%s)\n", err);
422 static int config_load(char *cfg)
424 struct uci_context *ctx = uci_alloc_context();
425 struct uci_package *pkg = NULL;
426 struct uci_element *e;
429 vlist_init(&mounts, avl_strcmp, mounts_update);
432 snprintf(path, sizeof(path), "%s/upper/etc/config/fstab", cfg);
433 pkg = config_try_load(ctx, path);
436 snprintf(path, sizeof(path), "%s/etc/config/fstab", cfg);
437 pkg = config_try_load(ctx, path);
442 snprintf(path, sizeof(path), "/etc/config/fstab");
443 pkg = config_try_load(ctx, path);
447 ULOG_ERR("no usable configuration\n");
451 vlist_update(&mounts);
452 uci_foreach_element(&pkg->sections, e) {
453 struct uci_section *s = uci_to_section(e);
455 if (!strcmp(s->type, "mount"))
457 if (!strcmp(s->type, "swap"))
459 if (!strcmp(s->type, "global"))
462 vlist_flush(&mounts);
467 static struct probe_info* _probe_path(char *path)
469 struct probe_info *pr;
472 /* skip ubi device if ubiblock device is present */
473 if (path[5] == 'u' && path[6] == 'b' && path[7] == 'i' &&
474 path[8] >= '0' && path[8] <= '9' ) {
475 snprintf(tmppath, sizeof(tmppath), "/dev/ubiblock%s", path + 8);
476 list_for_each_entry(pr, &devices, list)
477 if (!strcasecmp(pr->dev, tmppath))
481 return probe_path(path);
484 static int _cache_load(const char *path)
486 int gl_flags = GLOB_NOESCAPE | GLOB_MARK;
490 if (glob(path, gl_flags, NULL, &gl) < 0)
493 for (j = 0; j < gl.gl_pathc; j++) {
494 struct probe_info *pr = _probe_path(gl.gl_pathv[j]);
496 list_add_tail(&pr->list, &devices);
504 static void cache_load(int mtd)
507 _cache_load("/dev/mtdblock*");
508 _cache_load("/dev/ubiblock*");
509 _cache_load("/dev/ubi[0-9]*");
511 _cache_load("/dev/loop*");
512 _cache_load("/dev/mmcblk*");
513 _cache_load("/dev/sd*");
514 _cache_load("/dev/hd*");
515 _cache_load("/dev/md*");
516 _cache_load("/dev/vd*");
517 _cache_load("/dev/mapper/*");
521 static int print_block_uci(struct probe_info *pr)
523 if (!strcmp(pr->type, "swap")) {
524 printf("config 'swap'\n");
526 printf("config 'mount'\n");
527 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev));
530 printf("\toption\tuuid\t'%s'\n", pr->uuid);
532 printf("\toption\tdevice\t'%s'\n", pr->dev);
533 printf("\toption\tenabled\t'0'\n\n");
538 static struct probe_info* find_block_info(char *uuid, char *label, char *path)
540 struct probe_info *pr = NULL;
543 list_for_each_entry(pr, &devices, list)
544 if (pr->uuid && !strcasecmp(pr->uuid, uuid))
548 list_for_each_entry(pr, &devices, list)
549 if (pr->label && !strcmp(pr->label, label))
553 list_for_each_entry(pr, &devices, list)
554 if (pr->dev && !strcmp(basename(pr->dev), basename(path)))
560 static char* find_mount_point(char *block)
562 FILE *fp = fopen("/proc/self/mountinfo", "r");
563 static char line[256];
564 int len = strlen(block);
565 char *point = NULL, *pos, *tmp, *cpoint, *devname;
568 unsigned int minor, major;
573 rstat = stat(block, &s);
575 while (fgets(line, sizeof(line), fp)) {
576 pos = strchr(line, ' ');
580 pos = strchr(pos + 1, ' ');
585 pos = strchr(pos, ':');
592 pos = strchr(pos, ' ');
598 pos = strchr(pos + 1, ' ');
603 pos = strchr(pos, ' ');
609 pos = strchr(pos + 1, ' ');
613 pos = strchr(pos + 1, ' ');
617 pos = strchr(pos + 1, ' ');
622 pos = strchr(pos, ' ');
628 if (!strncmp(block, devname, len)) {
629 point = strdup(cpoint);
636 if (!S_ISBLK(s.st_mode))
639 if (major == major(s.st_rdev) &&
640 minor == minor(s.st_rdev)) {
641 point = strdup(cpoint);
651 static int print_block_info(struct probe_info *pr)
655 mp = find_mount_point(pr->dev);
656 printf("%s:", pr->dev);
658 printf(" UUID=\"%s\"", pr->uuid);
661 printf(" LABEL=\"%s\"", pr->label);
664 printf(" VERSION=\"%s\"", pr->version);
667 printf(" MOUNT=\"%s\"", mp);
671 printf(" TYPE=\"%s\"\n", pr->type);
676 static void mkdir_p(char *dir)
678 char *l = strrchr(dir, '/');
688 static void check_filesystem(struct probe_info *pr)
692 const char *e2fsck = "/usr/sbin/e2fsck";
693 const char *dosfsck = "/usr/sbin/dosfsck";
696 /* UBIFS does not need stuff like fsck */
697 if (!strncmp(pr->type, "ubifs", 5))
700 if (!strncmp(pr->type, "vfat", 4)) {
702 } else if (!strncmp(pr->type, "ext", 3)) {
705 ULOG_ERR("check_filesystem: %s is not supported\n", pr->type);
709 if (stat(ckfs, &statbuf) < 0) {
710 ULOG_ERR("check_filesystem: %s not found\n", ckfs);
716 execl(ckfs, ckfs, "-p", pr->dev, NULL);
718 } else if (pid > 0) {
721 waitpid(pid, &status, 0);
722 if (WEXITSTATUS(status))
723 ULOG_ERR("check_filesystem: %s returned %d\n", ckfs, WEXITSTATUS(status));
727 static void handle_swapfiles(bool on)
731 struct probe_info *pr;
733 vlist_for_each_element(&mounts, m, node)
735 if (m->type != TYPE_SWAP || !m->target)
738 if (stat(m->target, &s) || !S_ISREG(s.st_mode))
741 pr = _probe_path(m->target);
746 if (!strcmp(pr->type, "swap")) {
748 swapon(pr->dev, m->prio);
757 static void to_devnull(int fd)
759 int devnull = open("/dev/null", fd ? O_WRONLY : O_RDONLY);
764 if (devnull > STDERR_FILENO)
768 static int exec_mount(const char *source, const char *target,
769 const char *fstype, const char *options)
774 int err, status, pfds[2];
775 char errmsg[128], cmd[sizeof("/sbin/mount.XXXXXXXXXXXXXXXX\0")];
777 snprintf(cmd, sizeof(cmd), "/sbin/mount.%s", fstype);
779 if (stat(cmd, &s) < 0 || !S_ISREG(s.st_mode) || !(s.st_mode & S_IXUSR)) {
780 ULOG_ERR("No \"mount.%s\" utility available\n", fstype);
787 fcntl(pfds[0], F_SETFD, fcntl(pfds[0], F_GETFD) | FD_CLOEXEC);
788 fcntl(pfds[1], F_SETFD, fcntl(pfds[1], F_GETFD) | FD_CLOEXEC);
800 to_devnull(STDIN_FILENO);
801 to_devnull(STDOUT_FILENO);
803 dup2(pfds[1], STDERR_FILENO);
807 if (options && *options)
808 execl(cmd, cmd, "-o", options, source, target, NULL);
810 execl(cmd, cmd, source, target, NULL);
817 mount_fd = fdopen(pfds[0], "r");
819 while (fgets(errmsg, sizeof(errmsg), mount_fd))
820 ULOG_ERR("mount.%s: %s", fstype, errmsg);
824 err = waitpid(pid, &status, 0);
828 ULOG_ERR("mount.%s: failed with status %d\n", fstype, status);
843 static int handle_mount(const char *source, const char *target,
844 const char *fstype, struct mount *m)
847 size_t mount_opts_len;
848 char *mount_opts = NULL, *ptr;
850 err = mount(source, target, fstype, m ? m->flags : 0,
851 (m && m->options) ? m->options : "");
853 /* Requested file system type is not available in kernel,
854 attempt to call mount helper. */
855 if (err == -1 && errno == ENODEV) {
857 /* Convert mount flags back into string representation,
858 first calculate needed length of string buffer... */
859 mount_opts_len = 1 + (m->options ? strlen(m->options) : 0);
861 for (i = 0; i < ARRAY_SIZE(mount_flags); i++)
862 if ((mount_flags[i].flag > 0) &&
863 (mount_flags[i].flag < INT_MAX) &&
864 (m->flags & (uint32_t)mount_flags[i].flag))
865 mount_opts_len += strlen(mount_flags[i].name) + 1;
867 /* ... then now allocate and fill it ... */
868 ptr = mount_opts = calloc(1, mount_opts_len);
876 ptr += sprintf(ptr, "%s,", m->options);
878 for (i = 0; i < ARRAY_SIZE(mount_flags); i++)
879 if ((mount_flags[i].flag > 0) &&
880 (mount_flags[i].flag < INT_MAX) &&
881 (m->flags & (uint32_t)mount_flags[i].flag))
882 ptr += sprintf(ptr, "%s,", mount_flags[i].name);
884 mount_opts[mount_opts_len - 1] = 0;
887 /* ... and now finally invoke the external mount program */
888 err = exec_mount(source, target, fstype, mount_opts);
894 static int mount_device(struct probe_info *pr, int hotplug)
903 device = basename(pr->dev);
905 if (!strcmp(pr->type, "swap")) {
906 if (hotplug && !auto_swap)
908 m = find_swap(pr->uuid, pr->label, device);
910 swapon(pr->dev, (m) ? (m->prio) : (0));
915 if (hotplug && !auto_mount)
918 mp = find_mount_point(pr->dev);
920 ULOG_ERR("%s is already mounted on %s\n", pr->dev, mp);
925 m = find_block(pr->uuid, pr->label, device, NULL);
930 char *target = m->target;
935 snprintf(_target, sizeof(_target), "/mnt/%s", device);
941 check_filesystem(pr);
943 err = handle_mount(pr->dev, target, pr->type, m);
945 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %s\n",
946 pr->dev, pr->type, target, errno, strerror(errno));
948 handle_swapfiles(true);
956 snprintf(target, sizeof(target), "/mnt/%s", device);
960 check_filesystem(pr);
962 err = handle_mount(pr->dev, target, pr->type, NULL);
964 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %s\n",
965 pr->dev, pr->type, target, errno, strerror(errno));
967 handle_swapfiles(true);
974 static int umount_device(struct probe_info *pr)
977 char *device = basename(pr->dev);
984 if (!strcmp(pr->type, "swap"))
987 mp = find_mount_point(pr->dev);
991 m = find_block(pr->uuid, pr->label, device, NULL);
995 err = umount2(mp, MNT_DETACH);
997 ULOG_ERR("unmounting %s (%s) failed (%d) - %s\n",
998 pr->dev, mp, errno, strerror(errno));
1000 ULOG_INFO("unmounted %s (%s)\n",
1007 static int main_hotplug(int argc, char **argv)
1010 char *action, *device, *mount_point;
1012 action = getenv("ACTION");
1013 device = getenv("DEVNAME");
1015 if (!action || !device)
1017 snprintf(path, sizeof(path), "/dev/%s", device);
1019 if (!strcmp(action, "remove")) {
1021 mount_point = find_mount_point(path);
1023 err = umount2(mount_point, MNT_DETACH);
1026 ULOG_ERR("umount of %s failed (%d) - %s\n",
1027 mount_point, errno, strerror(errno));
1031 } else if (strcmp(action, "add")) {
1032 ULOG_ERR("Unkown action %s\n", action);
1037 if (config_load(NULL))
1041 return mount_device(find_block_info(NULL, NULL, path), 1);
1044 static int find_block_mtd(char *name, char *part, int plen)
1046 FILE *fp = fopen("/proc/mtd", "r");
1047 static char line[256];
1053 while (!index && fgets(line, sizeof(line), fp)) {
1054 if (strstr(line, name)) {
1055 char *eol = strstr(line, ":");
1070 snprintf(part, plen, "/dev/mtdblock%s", index);
1075 #ifdef UBIFS_EXTROOT
1076 static int find_ubi_vol(libubi_t libubi, char *name, int *dev_num, int *vol_id)
1080 while (ubi_dev_present(libubi, dev))
1082 struct ubi_dev_info dev_info;
1083 struct ubi_vol_info vol_info;
1085 if (ubi_get_dev_info1(libubi, dev++, &dev_info))
1087 if (ubi_get_vol_info1_nm(libubi, dev_info.dev_num, name, &vol_info))
1090 *dev_num = dev_info.dev_num;
1091 *vol_id = vol_info.vol_id;
1099 static int find_block_ubi(libubi_t libubi, char *name, char *part, int plen)
1105 err = find_ubi_vol(libubi, name, &dev_num, &vol_id);
1107 snprintf(part, plen, "/dev/ubi%d_%d", dev_num, vol_id);
1112 static int find_block_ubi_RO(libubi_t libubi, char *name, char *part, int plen)
1118 err = find_ubi_vol(libubi, name, &dev_num, &vol_id);
1120 snprintf(part, plen, "/dev/ubiblock%d_%d", dev_num, vol_id);
1127 static int find_root_dev(char *buf, int len)
1137 if (!(d = opendir("/dev")))
1142 while ((e = readdir(d)) != NULL) {
1143 snprintf(buf, len, "/dev/%s", e->d_name);
1145 if (stat(buf, &s) || s.st_rdev != root)
1158 static int test_fs_support(const char *name)
1164 if ((f = fopen("/proc/filesystems", "r")) != NULL) {
1165 while (fgets(line, sizeof(line), f)) {
1166 p = strtok(line, "\t\n");
1168 if (p && !strcmp(p, "nodev"))
1169 p = strtok(NULL, "\t\n");
1171 if (p && !strcmp(p, name)) {
1182 static int check_extroot(char *path)
1184 struct probe_info *pr = NULL;
1187 #ifdef UBIFS_EXTROOT
1188 if (find_block_mtd("\"rootfs\"", devpath, sizeof(devpath))) {
1192 libubi = libubi_open();
1193 err = find_block_ubi_RO(libubi, "rootfs", devpath, sizeof(devpath));
1194 libubi_close(libubi);
1199 if (find_block_mtd("\"rootfs\"", devpath, sizeof(devpath))) {
1200 if (find_root_dev(devpath, sizeof(devpath))) {
1201 ULOG_ERR("extroot: unable to determine root device\n");
1207 list_for_each_entry(pr, &devices, list) {
1208 if (!strcmp(pr->dev, devpath)) {
1212 char uuid[64] = { 0 };
1214 snprintf(tag, sizeof(tag), "%s/etc", path);
1218 snprintf(tag, sizeof(tag), "%s/etc/.extroot-uuid", path);
1219 if (stat(tag, &s)) {
1220 fp = fopen(tag, "w+");
1222 ULOG_ERR("extroot: failed to write UUID to %s: %d (%s)\n",
1223 tag, errno, strerror(errno));
1224 /* return 0 to continue boot regardless of error */
1227 fputs(pr->uuid, fp);
1232 fp = fopen(tag, "r");
1234 ULOG_ERR("extroot: failed to read UUID from %s: %d (%s)\n",
1235 tag, errno, strerror(errno));
1239 if (!fgets(uuid, sizeof(uuid), fp))
1240 ULOG_ERR("extroot: failed to read UUID from %s: %d (%s)\n",
1241 tag, errno, strerror(errno));
1244 if (*uuid && !strcasecmp(uuid, pr->uuid))
1247 ULOG_ERR("extroot: UUID mismatch (root: %s, %s: %s)\n",
1248 pr->uuid, basename(path), uuid);
1253 ULOG_ERR("extroot: unable to lookup root device %s\n", devpath);
1258 * Read info about extroot from UCI (using prefix) and mount it.
1260 static int mount_extroot(char *cfg)
1262 char overlay[] = "/tmp/extroot/overlay";
1263 char mnt[] = "/tmp/extroot/mnt";
1265 struct probe_info *pr;
1269 /* Load @cfg/etc/config/fstab */
1270 if (config_load(cfg))
1273 /* See if there is extroot-specific mount config */
1274 m = find_block(NULL, NULL, NULL, "/");
1276 m = find_block(NULL, NULL, NULL, "/overlay");
1278 if (!m || !m->extroot)
1280 ULOG_INFO("extroot: not configured\n");
1284 /* Find block device pointed by the mount config */
1285 pr = find_block_info(m->uuid, m->label, m->device);
1287 if (!pr && delay_root){
1288 ULOG_INFO("extroot: device not present, retrying in %u seconds\n", delay_root);
1292 pr = find_block_info(m->uuid, m->label, m->device);
1295 if (strncmp(pr->type, "ext", 3) &&
1296 strncmp(pr->type, "ubifs", 5)) {
1297 ULOG_ERR("extroot: unsupported filesystem %s, try ext4\n", pr->type);
1301 if (test_fs_support(pr->type)) {
1302 ULOG_ERR("extroot: filesystem %s not supported by kernel\n", pr->type);
1311 check_filesystem(pr);
1313 err = mount(pr->dev, path, pr->type, m->flags,
1314 (m->options) ? (m->options) : (""));
1317 ULOG_ERR("extroot: mounting %s (%s) on %s failed: %d (%s)\n",
1318 pr->dev, pr->type, path, errno, strerror(errno));
1319 } else if (m->overlay) {
1320 err = check_extroot(path);
1325 ULOG_ERR("extroot: cannot find device %s%s\n",
1326 (m->uuid ? "with UUID " : (m->label ? "with label " : "")),
1327 (m->uuid ? m->uuid : (m->label ? m->label : m->device)));
1333 static int main_extroot(int argc, char **argv)
1335 struct probe_info *pr;
1336 char blkdev_path[32] = { 0 };
1338 #ifdef UBIFS_EXTROOT
1342 if (!getenv("PREINIT"))
1346 ULOG_ERR("Usage: block extroot\n");
1353 /* enable LOG_INFO messages */
1354 ulog_threshold(LOG_INFO);
1357 * Look for "rootfs_data". We will want to mount it and check for
1358 * extroot configuration.
1361 /* Start with looking for MTD partition */
1362 find_block_mtd("\"rootfs_data\"", blkdev_path, sizeof(blkdev_path));
1363 if (blkdev_path[0]) {
1364 pr = find_block_info(NULL, NULL, blkdev_path);
1365 if (pr && !strcmp(pr->type, "jffs2")) {
1366 char cfg[] = "/tmp/jffs_cfg";
1369 * Mount MTD part and try extroot (using
1370 * /etc/config/fstab from that partition)
1373 if (!mount(blkdev_path, cfg, "jffs2", MS_NOATIME, NULL)) {
1374 err = mount_extroot(cfg);
1375 umount2(cfg, MNT_DETACH);
1378 rmdir("/tmp/overlay");
1384 #ifdef UBIFS_EXTROOT
1385 /* ... but it also could be an UBI volume */
1386 memset(blkdev_path, 0, sizeof(blkdev_path));
1387 libubi = libubi_open();
1388 find_block_ubi(libubi, "rootfs_data", blkdev_path, sizeof(blkdev_path));
1389 libubi_close(libubi);
1390 if (blkdev_path[0]) {
1391 char cfg[] = "/tmp/ubifs_cfg";
1393 /* Mount volume and try extroot (using fstab from that vol) */
1395 if (!mount(blkdev_path, cfg, "ubifs", MS_NOATIME, NULL)) {
1396 err = mount_extroot(cfg);
1397 umount2(cfg, MNT_DETACH);
1400 rmdir("/tmp/overlay");
1406 return mount_extroot(NULL);
1409 static int main_mount(int argc, char **argv)
1411 struct probe_info *pr;
1413 if (config_load(NULL))
1417 list_for_each_entry(pr, &devices, list)
1418 mount_device(pr, 0);
1420 handle_swapfiles(true);
1425 static int main_umount(int argc, char **argv)
1427 struct probe_info *pr;
1429 if (config_load(NULL))
1432 handle_swapfiles(false);
1435 list_for_each_entry(pr, &devices, list)
1441 static int main_detect(int argc, char **argv)
1443 struct probe_info *pr;
1446 printf("config 'global'\n");
1447 printf("\toption\tanon_swap\t'0'\n");
1448 printf("\toption\tanon_mount\t'0'\n");
1449 printf("\toption\tauto_swap\t'1'\n");
1450 printf("\toption\tauto_mount\t'1'\n");
1451 printf("\toption\tdelay_root\t'5'\n");
1452 printf("\toption\tcheck_fs\t'0'\n\n");
1453 list_for_each_entry(pr, &devices, list)
1454 print_block_uci(pr);
1459 static int main_info(int argc, char **argv)
1462 struct probe_info *pr;
1466 list_for_each_entry(pr, &devices, list)
1467 print_block_info(pr);
1472 for (i = 2; i < argc; i++) {
1475 if (stat(argv[i], &s)) {
1476 ULOG_ERR("failed to stat %s\n", argv[i]);
1479 if (!S_ISBLK(s.st_mode) && !(S_ISCHR(s.st_mode) && major(s.st_rdev) == 250)) {
1480 ULOG_ERR("%s is not a block device\n", argv[i]);
1483 pr = find_block_info(NULL, NULL, argv[i]);
1485 print_block_info(pr);
1491 static int swapon_usage(void)
1493 fprintf(stderr, "Usage: swapon [-s] [-a] [[-p pri] DEVICE]\n\n"
1494 "\tStart swapping on [DEVICE]\n"
1495 " -a\tStart swapping on all swap devices\n"
1496 " -p pri\tSet priority of swap device\n"
1497 " -s\tShow summary\n");
1501 static int main_swapon(int argc, char **argv)
1507 struct probe_info *pr;
1513 while ((ch = getopt(argc, argv, "ap:s")) != -1) {
1516 fp = fopen("/proc/swaps", "r");
1520 ULOG_ERR("failed to open /proc/swaps\n");
1523 while (getline(&lineptr, &s, fp) > 0)
1524 printf("%s", lineptr);
1531 list_for_each_entry(pr, &devices, list) {
1532 if (strcmp(pr->type, "swap"))
1534 if (swapon(pr->dev, 0))
1535 ULOG_ERR("failed to swapon %s\n", pr->dev);
1541 flags = ((pri << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
1544 return swapon_usage();
1549 if (optind != (argc - 1))
1550 return swapon_usage();
1552 if (stat(argv[optind], &st) || (!S_ISBLK(st.st_mode) && !S_ISREG(st.st_mode))) {
1553 ULOG_ERR("%s is not a block device or file\n", argv[optind]);
1556 err = swapon(argv[optind], flags);
1558 ULOG_ERR("failed to swapon %s (%d)\n", argv[optind], err);
1565 static int main_swapoff(int argc, char **argv)
1568 ULOG_ERR("Usage: swapoff [-a] [DEVICE]\n\n"
1569 "\tStop swapping on DEVICE\n"
1570 " -a\tStop swapping on all swap devices\n");
1574 if (!strcmp(argv[1], "-a")) {
1575 FILE *fp = fopen("/proc/swaps", "r");
1579 ULOG_ERR("failed to open /proc/swaps\n");
1582 if (fgets(line, sizeof(line), fp))
1583 while (fgets(line, sizeof(line), fp)) {
1584 char *end = strchr(line, ' ');
1590 err = swapoff(line);
1592 ULOG_ERR("failed to swapoff %s (%d)\n", line, err);
1599 if (stat(argv[1], &s) || (!S_ISBLK(s.st_mode) && !S_ISREG(s.st_mode))) {
1600 ULOG_ERR("%s is not a block device or file\n", argv[1]);
1603 err = swapoff(argv[1]);
1605 ULOG_ERR("failed to swapoff %s (%d)\n", argv[1], err);
1613 int main(int argc, char **argv)
1615 char *base = basename(*argv);
1619 ulog_open(-1, -1, "block");
1620 ulog_threshold(LOG_NOTICE);
1622 if (!strcmp(base, "swapon"))
1623 return main_swapon(argc, argv);
1625 if (!strcmp(base, "swapoff"))
1626 return main_swapoff(argc, argv);
1628 if ((argc > 1) && !strcmp(base, "block")) {
1629 if (!strcmp(argv[1], "info"))
1630 return main_info(argc, argv);
1632 if (!strcmp(argv[1], "detect"))
1633 return main_detect(argc, argv);
1635 if (!strcmp(argv[1], "hotplug"))
1636 return main_hotplug(argc, argv);
1638 if (!strcmp(argv[1], "extroot"))
1639 return main_extroot(argc, argv);
1641 if (!strcmp(argv[1], "mount"))
1642 return main_mount(argc, argv);
1644 if (!strcmp(argv[1], "umount"))
1645 return main_umount(argc, argv);
1647 if (!strcmp(argv[1], "remount")) {
1648 int ret = main_umount(argc, argv);
1651 ret = main_mount(argc, argv);
1656 ULOG_ERR("Usage: block <info|mount|umount|detect>\n");