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>
34 #include <sys/sysmacros.h>
41 #include <libubox/ulog.h>
42 #include <libubox/list.h>
43 #include <libubox/vlist.h>
44 #include <libubox/blobmsg_json.h>
45 #include <libubox/avl-cmp.h>
50 #define AUTOFS_MOUNT_PATH "/tmp/run/blockd/"
53 #include "libubi/libubi.h"
68 struct vlist_node node;
86 struct vlist_node node;
88 struct probe_info *pr;
92 static void vlist_nop_update(struct vlist_tree *tree, struct vlist_node *node_new,
93 struct vlist_node *node_old);
94 static int devices_cmp(const void *k1, const void *k2, void *ptr);
96 static struct blob_buf b;
97 static VLIST_TREE(mounts, avl_strcmp, vlist_nop_update, false, false);
98 static VLIST_TREE(devices, devices_cmp, vlist_nop_update, false, false);
99 static int anon_mount, anon_swap, auto_mount, auto_swap, check_fs;
100 static unsigned int delay_root;
112 static const struct blobmsg_policy config_policy[__CFG_MAX] = {
113 [CFG_ANON_SWAP] = { .name = "anon_swap", .type = BLOBMSG_TYPE_INT32 },
114 [CFG_ANON_MOUNT] = { .name = "anon_mount", .type = BLOBMSG_TYPE_INT32 },
115 [CFG_AUTO_SWAP] = { .name = "auto_swap", .type = BLOBMSG_TYPE_INT32 },
116 [CFG_AUTO_MOUNT] = { .name = "auto_mount", .type = BLOBMSG_TYPE_INT32 },
117 [CFG_DELAY_ROOT] = { .name = "delay_root", .type = BLOBMSG_TYPE_INT32 },
118 [CFG_CHECK_FS] = { .name = "check_fs", .type = BLOBMSG_TYPE_INT32 },
132 static const struct uci_blob_param_list config_attr_list = {
133 .n_params = __CFG_MAX,
134 .params = config_policy,
137 static const struct blobmsg_policy mount_policy[__MOUNT_MAX] = {
138 [MOUNT_UUID] = { .name = "uuid", .type = BLOBMSG_TYPE_STRING },
139 [MOUNT_LABEL] = { .name = "label", .type = BLOBMSG_TYPE_STRING },
140 [MOUNT_DEVICE] = { .name = "device", .type = BLOBMSG_TYPE_STRING },
141 [MOUNT_TARGET] = { .name = "target", .type = BLOBMSG_TYPE_STRING },
142 [MOUNT_OPTIONS] = { .name = "options", .type = BLOBMSG_TYPE_STRING },
143 [MOUNT_ENABLE] = { .name = "enabled", .type = BLOBMSG_TYPE_INT32 },
144 [MOUNT_AUTOFS] = { .name = "autofs", .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,
179 static const struct mount_flag mount_flags[] = {
180 { "sync", MS_SYNCHRONOUS },
181 { "async", ~MS_SYNCHRONOUS },
182 { "dirsync", MS_DIRSYNC },
183 { "mand", MS_MANDLOCK },
184 { "nomand", ~MS_MANDLOCK },
185 { "atime", ~MS_NOATIME },
186 { "noatime", MS_NOATIME },
187 { "dev", ~MS_NODEV },
188 { "nodev", MS_NODEV },
189 { "diratime", ~MS_NODIRATIME },
190 { "nodiratime", MS_NODIRATIME },
191 { "exec", ~MS_NOEXEC },
192 { "noexec", MS_NOEXEC },
193 { "suid", ~MS_NOSUID },
194 { "nosuid", MS_NOSUID },
195 { "rw", ~MS_RDONLY },
197 { "relatime", MS_RELATIME },
198 { "norelatime", ~MS_RELATIME },
199 { "strictatime", MS_STRICTATIME },
200 { "acl", MS_POSIXACL },
201 { "noacl", ~MS_POSIXACL },
202 { "nouser_xattr", MS_NOUSER },
203 { "user_xattr", ~MS_NOUSER },
206 static char *blobmsg_get_strdup(struct blob_attr *attr)
211 return strdup(blobmsg_get_string(attr));
214 static char *blobmsg_get_basename(struct blob_attr *attr)
219 return strdup(basename(blobmsg_get_string(attr)));
222 static void parse_mount_options(struct mount *m, char *optstr)
226 char *p, *opts, *last;
231 if (!optstr || !*optstr)
234 m->options = opts = calloc(1, strlen(optstr) + 1);
247 for (i = 0, is_flag = false; i < ARRAY_SIZE(mount_flags); i++) {
248 if (!strcmp(last, mount_flags[i].name)) {
249 if (mount_flags[i].flag < 0)
250 m->flags &= (uint32_t)mount_flags[i].flag;
252 m->flags |= (uint32_t)mount_flags[i].flag;
259 opts += sprintf(opts, "%s%s", (opts > m->options) ? "," : "", last);
268 static int mount_add(struct uci_section *s)
270 struct blob_attr *tb[__MOUNT_MAX] = { 0 };
273 blob_buf_init(&b, 0);
274 uci_to_blob(&b, s, &mount_attr_list);
275 blobmsg_parse(mount_policy, __MOUNT_MAX, tb, blob_data(b.head), blob_len(b.head));
277 if (!tb[MOUNT_LABEL] && !tb[MOUNT_UUID] && !tb[MOUNT_DEVICE])
280 if (tb[MOUNT_ENABLE] && !blobmsg_get_u32(tb[MOUNT_ENABLE]))
283 m = malloc(sizeof(struct mount));
284 m->type = TYPE_MOUNT;
285 m->uuid = blobmsg_get_strdup(tb[MOUNT_UUID]);
286 m->label = blobmsg_get_strdup(tb[MOUNT_LABEL]);
287 m->target = blobmsg_get_strdup(tb[MOUNT_TARGET]);
288 m->device = blobmsg_get_basename(tb[MOUNT_DEVICE]);
289 if (tb[MOUNT_AUTOFS])
290 m->autofs = blobmsg_get_u32(tb[MOUNT_AUTOFS]);
293 parse_mount_options(m, blobmsg_get_strdup(tb[MOUNT_OPTIONS]));
295 m->overlay = m->extroot = 0;
296 if (m->target && !strcmp(m->target, "/"))
298 if (m->target && !strcmp(m->target, "/overlay"))
299 m->extroot = m->overlay = 1;
301 if (m->target && *m->target != '/') {
302 ULOG_WARN("ignoring mount section %s due to invalid target '%s'\n",
303 s->e.name, m->target);
309 vlist_add(&mounts, &m->node, m->uuid);
311 vlist_add(&mounts, &m->node, m->label);
313 vlist_add(&mounts, &m->node, m->device);
318 static int swap_add(struct uci_section *s)
320 struct blob_attr *tb[__SWAP_MAX] = { 0 };
323 blob_buf_init(&b, 0);
324 uci_to_blob(&b, s, &swap_attr_list);
325 blobmsg_parse(swap_policy, __SWAP_MAX, tb, blob_data(b.head), blob_len(b.head));
327 if (!tb[SWAP_UUID] && !tb[SWAP_LABEL] && !tb[SWAP_DEVICE])
330 m = malloc(sizeof(struct mount));
331 memset(m, 0, sizeof(struct mount));
333 m->uuid = blobmsg_get_strdup(tb[SWAP_UUID]);
334 m->label = blobmsg_get_strdup(tb[SWAP_LABEL]);
335 m->device = blobmsg_get_basename(tb[SWAP_DEVICE]);
337 m->prio = blobmsg_get_u32(tb[SWAP_PRIO]);
339 m->prio = ((m->prio << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
341 if ((!tb[SWAP_ENABLE]) || blobmsg_get_u32(tb[SWAP_ENABLE])) {
342 /* store complete swap path */
344 m->target = blobmsg_get_strdup(tb[SWAP_DEVICE]);
347 vlist_add(&mounts, &m->node, m->uuid);
349 vlist_add(&mounts, &m->node, m->label);
351 vlist_add(&mounts, &m->node, m->device);
357 static int global_add(struct uci_section *s)
359 struct blob_attr *tb[__CFG_MAX] = { 0 };
361 blob_buf_init(&b, 0);
362 uci_to_blob(&b, s, &config_attr_list);
363 blobmsg_parse(config_policy, __CFG_MAX, tb, blob_data(b.head), blob_len(b.head));
365 if ((tb[CFG_ANON_MOUNT]) && blobmsg_get_u32(tb[CFG_ANON_MOUNT]))
367 if ((tb[CFG_ANON_SWAP]) && blobmsg_get_u32(tb[CFG_ANON_SWAP]))
370 if ((tb[CFG_AUTO_MOUNT]) && blobmsg_get_u32(tb[CFG_AUTO_MOUNT]))
372 if ((tb[CFG_AUTO_SWAP]) && blobmsg_get_u32(tb[CFG_AUTO_SWAP]))
375 if (tb[CFG_DELAY_ROOT])
376 delay_root = blobmsg_get_u32(tb[CFG_DELAY_ROOT]);
378 if ((tb[CFG_CHECK_FS]) && blobmsg_get_u32(tb[CFG_CHECK_FS]))
384 static struct mount* find_swap(const char *uuid, const char *label, const char *device)
388 vlist_for_each_element(&mounts, m, node) {
389 if (m->type != TYPE_SWAP)
391 if (uuid && m->uuid && !strcasecmp(m->uuid, uuid))
393 if (label && m->label && !strcmp(m->label, label))
395 if (device && m->device && !strcmp(m->device, device))
402 static struct mount* find_block(const char *uuid, const char *label, const char *device,
407 vlist_for_each_element(&mounts, m, node) {
408 if (m->type != TYPE_MOUNT)
410 if (m->uuid && uuid && !strcasecmp(m->uuid, uuid))
412 if (m->label && label && !strcmp(m->label, label))
414 if (m->target && target && !strcmp(m->target, target))
416 if (m->device && device && !strcmp(m->device, device))
423 static void vlist_nop_update(struct vlist_tree *tree, struct vlist_node *node_new,
424 struct vlist_node *node_old)
426 // NOTE: free on delete skipped
429 static struct uci_package * config_try_load(struct uci_context *ctx, char *path)
431 char *file = basename(path);
432 char *dir = dirname(path);
434 struct uci_package *pkg;
436 uci_set_confdir(ctx, dir);
437 ULOG_INFO("attempting to load %s/%s\n", dir, file);
439 if (uci_load(ctx, file, &pkg)) {
440 uci_get_errorstr(ctx, &err, file);
441 ULOG_ERR("unable to load configuration (%s)\n", err);
450 static int config_load(char *cfg)
452 struct uci_context *ctx = uci_alloc_context();
453 struct uci_package *pkg = NULL;
454 struct uci_element *e;
458 snprintf(path, sizeof(path), "%s/upper/etc/config/fstab", cfg);
459 pkg = config_try_load(ctx, path);
462 snprintf(path, sizeof(path), "%s/etc/config/fstab", cfg);
463 pkg = config_try_load(ctx, path);
468 snprintf(path, sizeof(path), "/etc/config/fstab");
469 pkg = config_try_load(ctx, path);
473 ULOG_ERR("no usable configuration\n");
477 vlist_update(&mounts);
478 uci_foreach_element(&pkg->sections, e) {
479 struct uci_section *s = uci_to_section(e);
481 if (!strcmp(s->type, "mount"))
483 if (!strcmp(s->type, "swap"))
485 if (!strcmp(s->type, "global"))
488 vlist_flush(&mounts);
493 static struct probe_info* _probe_path(char *path)
498 /* skip ubi device if ubiblock device is present */
499 if (path[5] == 'u' && path[6] == 'b' && path[7] == 'i' &&
500 path[8] >= '0' && path[8] <= '9' ) {
501 snprintf(tmppath, sizeof(tmppath), "/dev/ubiblock%s", path + 8);
502 vlist_for_each_element(&devices, dev, node)
503 if (!strcasecmp(dev->pr->dev, tmppath))
507 return probe_path(path);
510 static int _cache_load(const char *path)
512 int gl_flags = GLOB_NOESCAPE | GLOB_MARK;
517 if (glob(path, gl_flags, NULL, &gl) < 0)
520 for (j = 0; j < gl.gl_pathc; j++) {
521 struct probe_info *pr = _probe_path(gl.gl_pathv[j]);
523 dev = malloc(sizeof(struct device));
525 dev->m = find_block(pr->uuid, pr->label,
526 basename(pr->dev), NULL);
527 vlist_add(&devices, &dev->node, dev);
536 static int devices_cmp(const void *k1, const void *k2, void *ptr)
538 struct device *dev1 = (struct device *)k1;
539 struct device *dev2 = (struct device *)k2;
544 if (dev1->m->type == TYPE_MOUNT && dev2->m->type == TYPE_MOUNT &&
545 dev1->m->target && dev2->m->target) {
546 int len1 = strlen(dev1->m->target);
547 int len2 = strlen(dev2->m->target);
551 } else if (dev2->m) {
554 return strcmp(dev1->pr->dev, dev2->pr->dev);
557 static void cache_load(int mtd)
559 vlist_update(&devices);
561 _cache_load("/dev/mtdblock*");
562 _cache_load("/dev/ubiblock*");
563 _cache_load("/dev/ubi[0-9]*");
565 _cache_load("/dev/loop*");
566 _cache_load("/dev/mmcblk*");
567 _cache_load("/dev/sd*");
568 _cache_load("/dev/hd*");
569 _cache_load("/dev/md*");
570 _cache_load("/dev/nvme*");
571 _cache_load("/dev/vd*");
572 _cache_load("/dev/xvd*");
573 _cache_load("/dev/mapper/*");
574 vlist_flush(&devices);
578 static struct device* find_block_device(char *uuid, char *label, char *path)
583 vlist_for_each_element(&devices, dev, node)
584 if (dev->pr->uuid && !strcasecmp(dev->pr->uuid, uuid))
588 vlist_for_each_element(&devices, dev, node)
589 if (dev->pr->label && !strcmp(dev->pr->label, label))
593 vlist_for_each_element(&devices, dev, node)
594 if (dev->pr->dev && !strcmp(basename(dev->pr->dev), basename(path)))
600 static char* find_mount_point(char *block)
602 FILE *fp = fopen("/proc/self/mountinfo", "r");
603 static char line[256];
604 char *point = NULL, *pos, *tmp, *cpoint, *devname;
607 unsigned int minor, major;
612 rstat = stat(block, &s);
614 while (fgets(line, sizeof(line), fp)) {
615 pos = strchr(line, ' ');
619 pos = strchr(pos + 1, ' ');
624 pos = strchr(pos, ':');
631 pos = strchr(pos, ' ');
637 pos = strchr(pos + 1, ' ');
642 pos = strchr(pos, ' ');
648 pos = strchr(pos + 1, ' ');
652 pos = strchr(pos + 1, ' ');
656 pos = strchr(pos + 1, ' ');
661 pos = strchr(pos, ' ');
667 if (!strcmp(block, devname)) {
668 point = strdup(cpoint);
675 if (!S_ISBLK(s.st_mode))
678 if (major == major(s.st_rdev) &&
679 minor == minor(s.st_rdev)) {
680 point = strdup(cpoint);
690 static int print_block_uci(struct probe_info *pr)
692 if (!strcmp(pr->type, "swap")) {
693 printf("config 'swap'\n");
695 char *mp = find_mount_point(pr->dev);
697 printf("config 'mount'\n");
699 printf("\toption\ttarget\t'%s'\n", mp);
702 printf("\toption\ttarget\t'/mnt/%s'\n", basename(pr->dev));
706 printf("\toption\tuuid\t'%s'\n", pr->uuid);
708 printf("\toption\tdevice\t'%s'\n", pr->dev);
709 printf("\toption\tenabled\t'0'\n\n");
714 static int print_block_info(struct probe_info *pr)
718 mp = find_mount_point(pr->dev);
719 printf("%s:", pr->dev);
721 printf(" UUID=\"%s\"", pr->uuid);
724 printf(" LABEL=\"%s\"", pr->label);
727 printf(" VERSION=\"%s\"", pr->version);
730 printf(" MOUNT=\"%s\"", mp);
734 printf(" TYPE=\"%s\"\n", pr->type);
739 static void mkdir_p(char *dir)
741 char *l = strrchr(dir, '/');
751 static void check_filesystem(struct probe_info *pr)
755 const char *e2fsck = "/usr/sbin/e2fsck";
756 const char *f2fsck = "/usr/sbin/fsck.f2fs";
757 const char *fatfsck = "/usr/sbin/fsck.fat";
758 const char *btrfsck = "/usr/bin/btrfsck";
759 const char *ntfsck = "/usr/bin/ntfsfix";
762 /* UBIFS does not need stuff like fsck */
763 if (!strncmp(pr->type, "ubifs", 5))
766 if (!strncmp(pr->type, "vfat", 4)) {
768 } else if (!strncmp(pr->type, "f2fs", 4)) {
770 } else if (!strncmp(pr->type, "ext", 3)) {
772 } else if (!strncmp(pr->type, "btrfs", 5)) {
774 } else if (!strncmp(pr->type, "ntfs", 4)) {
777 ULOG_ERR("check_filesystem: %s is not supported\n", pr->type);
781 if (stat(ckfs, &statbuf) < 0) {
782 ULOG_ERR("check_filesystem: %s not found\n", ckfs);
788 if(!strncmp(pr->type, "f2fs", 4)) {
789 execl(ckfs, ckfs, "-f", pr->dev, NULL);
791 } else if(!strncmp(pr->type, "btrfs", 5)) {
792 execl(ckfs, ckfs, "--repair", pr->dev, NULL);
794 } else if(!strncmp(pr->type, "ntfs", 4)) {
795 execl(ckfs, ckfs, "-b", pr->dev, NULL);
798 execl(ckfs, ckfs, "-p", pr->dev, NULL);
801 } else if (pid > 0) {
804 waitpid(pid, &status, 0);
805 if (WIFEXITED(status) && WEXITSTATUS(status))
806 ULOG_ERR("check_filesystem: %s returned %d\n", ckfs, WEXITSTATUS(status));
807 if (WIFSIGNALED(status))
808 ULOG_ERR("check_filesystem: %s terminated by %s\n", ckfs, strsignal(WTERMSIG(status)));
812 static void handle_swapfiles(bool on)
816 struct probe_info *pr;
818 vlist_for_each_element(&mounts, m, node)
820 if (m->type != TYPE_SWAP || !m->target)
823 if (stat(m->target, &s) || !S_ISREG(s.st_mode))
826 pr = _probe_path(m->target);
831 if (!strcmp(pr->type, "swap")) {
833 swapon(pr->dev, m->prio);
842 static void to_devnull(int fd)
844 int devnull = open("/dev/null", fd ? O_WRONLY : O_RDONLY);
849 if (devnull > STDERR_FILENO)
853 static int exec_mount(const char *source, const char *target,
854 const char *fstype, const char *options)
859 int err, status, pfds[2];
860 char errmsg[128], cmd[sizeof("/sbin/mount.XXXXXXXXXXXXXXXX\0")];
862 snprintf(cmd, sizeof(cmd), "/sbin/mount.%s", fstype);
864 if (stat(cmd, &s) < 0 || !S_ISREG(s.st_mode) || !(s.st_mode & S_IXUSR)) {
865 ULOG_ERR("No \"mount.%s\" utility available\n", fstype);
872 fcntl(pfds[0], F_SETFD, fcntl(pfds[0], F_GETFD) | FD_CLOEXEC);
873 fcntl(pfds[1], F_SETFD, fcntl(pfds[1], F_GETFD) | FD_CLOEXEC);
885 to_devnull(STDIN_FILENO);
886 to_devnull(STDOUT_FILENO);
888 dup2(pfds[1], STDERR_FILENO);
892 if (options && *options)
893 execl(cmd, cmd, "-o", options, source, target, NULL);
895 execl(cmd, cmd, source, target, NULL);
902 mount_fd = fdopen(pfds[0], "r");
904 while (fgets(errmsg, sizeof(errmsg), mount_fd))
905 ULOG_ERR("mount.%s: %s", fstype, errmsg);
909 err = waitpid(pid, &status, 0);
913 ULOG_ERR("mount.%s: failed with status %d\n", fstype, status);
928 static int hotplug_call_mount(const char *action, const char *device)
935 char * const argv[] = { "hotplug-call", "mount", NULL };
937 setenv("ACTION", action, 1);
938 setenv("DEVICE", device, 1);
940 execv("/sbin/hotplug-call", argv);
942 } else if (pid > 0) {
945 pid = waitpid(pid, &status, 0);
946 if (pid <= 0 || !WIFEXITED(status) || WEXITSTATUS(status)) {
948 ULOG_ERR("hotplug-call call failed\n");
957 static int handle_mount(const char *source, const char *target,
958 const char *fstype, struct mount *m)
961 size_t mount_opts_len;
962 char *mount_opts = NULL, *ptr;
964 err = mount(source, target, fstype, m ? m->flags : 0,
965 (m && m->options) ? m->options : "");
967 /* Requested file system type is not available in kernel,
968 attempt to call mount helper. */
969 if (err == -1 && errno == ENODEV) {
971 /* Convert mount flags back into string representation,
972 first calculate needed length of string buffer... */
973 mount_opts_len = 1 + (m->options ? strlen(m->options) : 0);
975 for (i = 0; i < ARRAY_SIZE(mount_flags); i++)
976 if ((mount_flags[i].flag > 0) &&
977 (mount_flags[i].flag < INT_MAX) &&
978 (m->flags & (uint32_t)mount_flags[i].flag))
979 mount_opts_len += strlen(mount_flags[i].name) + 1;
981 /* ... then now allocate and fill it ... */
982 ptr = mount_opts = calloc(1, mount_opts_len);
990 ptr += sprintf(ptr, "%s,", m->options);
992 for (i = 0; i < ARRAY_SIZE(mount_flags); i++)
993 if ((mount_flags[i].flag > 0) &&
994 (mount_flags[i].flag < INT_MAX) &&
995 (m->flags & (uint32_t)mount_flags[i].flag))
996 ptr += sprintf(ptr, "%s,", mount_flags[i].name);
998 mount_opts[mount_opts_len - 1] = 0;
1001 /* ... and now finally invoke the external mount program */
1002 err = exec_mount(source, target, fstype, mount_opts);
1008 static int blockd_notify(char *device, struct mount *m, struct probe_info *pr)
1010 struct ubus_context *ctx = ubus_connect(NULL);
1017 if (!ubus_lookup_id(ctx, "block", &id)) {
1018 struct blob_buf buf = { 0 };
1019 char *d = strrchr(device, '/');
1026 blob_buf_init(&buf, 0);
1030 blobmsg_add_string(&buf, "device", d);
1032 blobmsg_add_string(&buf, "uuid", m->uuid);
1034 blobmsg_add_string(&buf, "label", m->label);
1036 blobmsg_add_string(&buf, "target", m->target);
1038 blobmsg_add_string(&buf, "options", m->options);
1040 blobmsg_add_u32(&buf, "autofs", m->autofs);
1042 blobmsg_add_string(&buf, "type", pr->type);
1044 blobmsg_add_string(&buf, "version", pr->version);
1046 blobmsg_add_string(&buf, "device", d);
1048 blobmsg_add_string(&buf, "uuid", pr->uuid);
1050 blobmsg_add_string(&buf, "label", pr->label);
1052 blobmsg_add_string(&buf, "type", pr->type);
1054 blobmsg_add_string(&buf, "version", pr->version);
1055 blobmsg_add_u32(&buf, "anon", 1);
1057 blobmsg_add_string(&buf, "device", d);
1058 blobmsg_add_u32(&buf, "remove", 1);
1061 err = ubus_invoke(ctx, id, "hotplug", buf.head, NULL, NULL, 3000);
1071 static int mount_device(struct device *dev, int type)
1074 struct probe_info *pr;
1085 device = basename(pr->dev);
1087 if (!strcmp(pr->type, "swap")) {
1088 if ((type == TYPE_HOTPLUG) && !auto_swap)
1090 m = find_swap(pr->uuid, pr->label, device);
1092 swapon(pr->dev, (m) ? (m->prio) : (0));
1098 if (m && m->extroot)
1101 mp = find_mount_point(pr->dev);
1103 if (m && m->type == TYPE_MOUNT && strcmp(m->target, mp)) {
1104 ULOG_ERR("%s is already mounted on %s\n", pr->dev, mp);
1112 if (type == TYPE_HOTPLUG)
1113 blockd_notify(device, m, pr);
1115 /* Check if device should be mounted & set the target directory */
1135 snprintf(_target, sizeof(_target), "/tmp/run/blockd/%s", device);
1137 } else if (m->target) {
1140 snprintf(_target, sizeof(_target), "/mnt/%s", device);
1143 } else if (anon_mount) {
1144 snprintf(_target, sizeof(_target), "/mnt/%s", device);
1147 /* No reason to mount this device */
1151 /* Mount the device */
1154 check_filesystem(pr);
1158 err = handle_mount(pr->dev, target, pr->type, m);
1160 ULOG_ERR("mounting %s (%s) as %s failed (%d) - %m\n",
1161 pr->dev, pr->type, target, errno);
1165 handle_swapfiles(true);
1167 if (type != TYPE_AUTOFS)
1168 hotplug_call_mount("add", device);
1173 static int umount_device(char *path, int type, bool all)
1178 mp = find_mount_point(path);
1181 if (!strcmp(mp, "/") && !all)
1184 if (type != TYPE_AUTOFS)
1185 hotplug_call_mount("remove", basename(path));
1187 err = umount2(mp, MNT_DETACH);
1189 ULOG_ERR("unmounting %s (%s) failed (%d) - %m\n", path, mp,
1192 ULOG_INFO("unmounted %s (%s)\n", path, mp);
1200 static int mount_action(char *action, char *device, int type)
1202 struct device *the_dev, *dev;
1205 if (!action || !device)
1208 if (config_load(NULL))
1212 the_dev = find_block_device(NULL, NULL, device);
1214 if (!strcmp(action, "remove")) {
1215 if (type == TYPE_HOTPLUG)
1216 blockd_notify(device, NULL, NULL);
1218 if (!the_dev || !the_dev->m || the_dev->m->type != TYPE_MOUNT) {
1219 snprintf(path, sizeof(path), "/dev/%s", device);
1220 umount_device(path, type, true);
1222 vlist_for_element_to_last_reverse(&devices, the_dev, dev, node)
1223 if (dev->m && dev->m->type == TYPE_MOUNT)
1224 umount_device(dev->pr->dev, type, true);
1226 } else if (!strcmp(action, "add")) {
1229 if (the_dev->m && the_dev->m->type == TYPE_MOUNT) {
1230 vlist_for_first_to_element(&devices, the_dev, dev, node) {
1231 if (dev->m && dev->m->type == TYPE_MOUNT) {
1232 int err = mount_device(dev, type);
1239 return mount_device(the_dev, type);
1241 ULOG_ERR("Unkown action %s\n", action);
1245 static int main_hotplug(int argc, char **argv)
1247 return mount_action(getenv("ACTION"), getenv("DEVNAME"), TYPE_HOTPLUG);
1250 static int main_autofs(int argc, char **argv)
1257 if (!strcmp(argv[2], "start")) {
1259 struct probe_info *pr;
1261 if (config_load(NULL))
1265 vlist_for_each_element(&devices, dev, node) {
1269 if (!strcmp(pr->type, "swap"))
1273 if (m && m->extroot)
1276 blockd_notify(pr->dev, m, pr);
1278 } else if (!strcmp(argv[2], "available")) {
1279 err = hotplug_call_mount("add", argv[3]);
1280 } else if (!strcmp(argv[2], "unavailable")) {
1281 err = hotplug_call_mount("remove", argv[3]);
1286 err = mount_action(argv[2], argv[3], TYPE_AUTOFS);
1290 ULOG_ERR("autofs: \"%s\" action has failed: %d\n", argv[2], err);
1296 static int find_block_mtd(char *name, char *part, int plen)
1298 FILE *fp = fopen("/proc/mtd", "r");
1299 static char line[256];
1305 while (!index && fgets(line, sizeof(line), fp)) {
1306 if (strstr(line, name)) {
1307 char *eol = strstr(line, ":");
1322 snprintf(part, plen, "/dev/mtdblock%s", index);
1327 #ifdef UBIFS_EXTROOT
1328 static int find_ubi_vol(libubi_t libubi, char *name, int *dev_num, int *vol_id)
1332 while (ubi_dev_present(libubi, dev))
1334 struct ubi_dev_info dev_info;
1335 struct ubi_vol_info vol_info;
1337 if (ubi_get_dev_info1(libubi, dev++, &dev_info))
1339 if (ubi_get_vol_info1_nm(libubi, dev_info.dev_num, name, &vol_info))
1342 *dev_num = dev_info.dev_num;
1343 *vol_id = vol_info.vol_id;
1351 static int find_block_ubi(libubi_t libubi, char *name, char *part, int plen)
1357 err = find_ubi_vol(libubi, name, &dev_num, &vol_id);
1359 snprintf(part, plen, "/dev/ubi%d_%d", dev_num, vol_id);
1364 static int find_block_ubi_RO(libubi_t libubi, char *name, char *part, int plen)
1370 err = find_ubi_vol(libubi, name, &dev_num, &vol_id);
1372 snprintf(part, plen, "/dev/ubiblock%d_%d", dev_num, vol_id);
1379 static int find_root_dev(char *buf, int len)
1389 if (!(d = opendir("/dev")))
1394 while ((e = readdir(d)) != NULL) {
1395 snprintf(buf, len, "/dev/%s", e->d_name);
1397 if (stat(buf, &s) || s.st_rdev != root)
1410 static int test_fs_support(const char *name)
1416 if ((f = fopen("/proc/filesystems", "r")) != NULL) {
1417 while (fgets(line, sizeof(line), f)) {
1418 p = strtok(line, "\t\n");
1420 if (p && !strcmp(p, "nodev"))
1421 p = strtok(NULL, "\t\n");
1423 if (p && !strcmp(p, name)) {
1434 static int check_extroot(char *path)
1437 struct probe_info *pr;
1440 #ifdef UBIFS_EXTROOT
1441 if (find_block_mtd("\"rootfs\"", devpath, sizeof(devpath))) {
1445 libubi = libubi_open();
1446 err = find_block_ubi_RO(libubi, "rootfs", devpath, sizeof(devpath));
1447 libubi_close(libubi);
1452 if (find_block_mtd("\"rootfs\"", devpath, sizeof(devpath))) {
1453 if (find_root_dev(devpath, sizeof(devpath))) {
1454 ULOG_ERR("extroot: unable to determine root device\n");
1460 vlist_for_each_element(&devices, dev, node) {
1462 if (!strcmp(pr->dev, devpath)) {
1466 char uuid[64] = { 0 };
1468 snprintf(tag, sizeof(tag), "%s/etc", path);
1472 snprintf(tag, sizeof(tag), "%s/etc/.extroot-uuid", path);
1473 if (stat(tag, &s)) {
1474 fp = fopen(tag, "w+");
1476 ULOG_ERR("extroot: failed to write UUID to %s: %d (%m)\n",
1478 /* return 0 to continue boot regardless of error */
1481 fputs(pr->uuid, fp);
1486 fp = fopen(tag, "r");
1488 ULOG_ERR("extroot: failed to read UUID from %s: %d (%m)\n",
1493 if (!fgets(uuid, sizeof(uuid), fp))
1494 ULOG_ERR("extroot: failed to read UUID from %s: %d (%m)\n",
1498 if (*uuid && !strcasecmp(uuid, pr->uuid))
1501 ULOG_ERR("extroot: UUID mismatch (root: %s, %s: %s)\n",
1502 pr->uuid, basename(path), uuid);
1507 ULOG_ERR("extroot: unable to lookup root device %s\n", devpath);
1512 * Read info about extroot from UCI (using prefix) and mount it.
1514 static int mount_extroot(char *cfg)
1516 char overlay[] = "/tmp/extroot/overlay";
1517 char mnt[] = "/tmp/extroot/mnt";
1520 struct probe_info *pr;
1524 /* Load @cfg/etc/config/fstab */
1525 if (config_load(cfg))
1528 /* See if there is extroot-specific mount config */
1529 m = find_block(NULL, NULL, NULL, "/");
1531 m = find_block(NULL, NULL, NULL, "/overlay");
1533 if (!m || !m->extroot)
1535 ULOG_INFO("extroot: not configured\n");
1539 /* Find block device pointed by the mount config */
1540 dev = find_block_device(m->uuid, m->label, m->device);
1542 if (!dev && delay_root){
1543 ULOG_INFO("extroot: device not present, retrying in %u seconds\n", delay_root);
1547 dev = find_block_device(m->uuid, m->label, m->device);
1551 if (strncmp(pr->type, "ext", 3) &&
1552 strncmp(pr->type, "f2fs", 4) &&
1553 strncmp(pr->type, "btrfs", 5) &&
1554 strncmp(pr->type, "ntfs", 4) &&
1555 strncmp(pr->type, "ubifs", 5)) {
1556 ULOG_ERR("extroot: unsupported filesystem %s, try ext4, f2fs, btrfs, ntfs or ubifs\n", pr->type);
1560 if (test_fs_support(pr->type)) {
1561 ULOG_ERR("extroot: filesystem %s not supported by kernel\n", pr->type);
1570 check_filesystem(pr);
1572 err = mount(pr->dev, path, pr->type, m->flags,
1573 (m->options) ? (m->options) : (""));
1576 ULOG_ERR("extroot: mounting %s (%s) on %s failed: %d (%m)\n",
1577 pr->dev, pr->type, path, errno);
1578 } else if (m->overlay) {
1579 err = check_extroot(path);
1584 ULOG_ERR("extroot: cannot find device %s%s\n",
1585 (m->uuid ? "with UUID " : (m->label ? "with label " : "")),
1586 (m->uuid ? m->uuid : (m->label ? m->label : m->device)));
1592 static int main_extroot(int argc, char **argv)
1594 char blkdev_path[32] = { 0 };
1596 #ifdef UBIFS_EXTROOT
1600 if (!getenv("PREINIT"))
1604 ULOG_ERR("Usage: block extroot\n");
1611 /* enable LOG_INFO messages */
1612 ulog_threshold(LOG_INFO);
1615 * Look for "rootfs_data". We will want to mount it and check for
1616 * extroot configuration.
1619 /* Start with looking for MTD partition */
1620 find_block_mtd("\"rootfs_data\"", blkdev_path, sizeof(blkdev_path));
1621 if (blkdev_path[0]) {
1622 struct device *dev = find_block_device(NULL, NULL, blkdev_path);
1623 if (dev && !strcmp(dev->pr->type, "jffs2")) {
1624 char cfg[] = "/tmp/jffs_cfg";
1627 * Mount MTD part and try extroot (using
1628 * /etc/config/fstab from that partition)
1631 if (!mount(blkdev_path, cfg, "jffs2", MS_NOATIME, NULL)) {
1632 err = mount_extroot(cfg);
1633 umount2(cfg, MNT_DETACH);
1636 rmdir("/tmp/overlay");
1642 #ifdef UBIFS_EXTROOT
1643 /* ... but it also could be an UBI volume */
1644 memset(blkdev_path, 0, sizeof(blkdev_path));
1645 libubi = libubi_open();
1646 find_block_ubi(libubi, "rootfs_data", blkdev_path, sizeof(blkdev_path));
1647 libubi_close(libubi);
1648 if (blkdev_path[0]) {
1649 char cfg[] = "/tmp/ubifs_cfg";
1651 /* Mount volume and try extroot (using fstab from that vol) */
1653 if (!mount(blkdev_path, cfg, "ubifs", MS_NOATIME, NULL)) {
1654 err = mount_extroot(cfg);
1655 umount2(cfg, MNT_DETACH);
1658 rmdir("/tmp/overlay");
1664 return mount_extroot(NULL);
1667 static int main_mount(int argc, char **argv)
1671 if (config_load(NULL))
1675 vlist_for_each_element(&devices, dev, node)
1676 mount_device(dev, TYPE_DEV);
1678 handle_swapfiles(true);
1683 static int main_umount(int argc, char **argv)
1686 struct probe_info *pr;
1689 if (config_load(NULL))
1692 handle_swapfiles(false);
1697 all = !strcmp(argv[2], "-a");
1699 vlist_for_each_element_reverse(&devices, dev, node) {
1703 if (!strcmp(pr->type, "swap"))
1707 if (m && m->extroot)
1710 umount_device(pr->dev, TYPE_DEV, all);
1716 static int main_detect(int argc, char **argv)
1721 printf("config 'global'\n");
1722 printf("\toption\tanon_swap\t'0'\n");
1723 printf("\toption\tanon_mount\t'0'\n");
1724 printf("\toption\tauto_swap\t'1'\n");
1725 printf("\toption\tauto_mount\t'1'\n");
1726 printf("\toption\tdelay_root\t'5'\n");
1727 printf("\toption\tcheck_fs\t'0'\n\n");
1728 vlist_for_each_element(&devices, dev, node)
1729 print_block_uci(dev->pr);
1734 static int main_info(int argc, char **argv)
1741 vlist_for_each_element(&devices, dev, node)
1742 print_block_info(dev->pr);
1747 for (i = 2; i < argc; i++) {
1750 if (stat(argv[i], &s)) {
1751 ULOG_ERR("failed to stat %s\n", argv[i]);
1754 if (!S_ISBLK(s.st_mode) && !(S_ISCHR(s.st_mode) && major(s.st_rdev) == 250)) {
1755 ULOG_ERR("%s is not a block device\n", argv[i]);
1758 dev = find_block_device(NULL, NULL, argv[i]);
1760 print_block_info(dev->pr);
1766 static int swapon_usage(void)
1768 fprintf(stderr, "Usage: swapon [-s] [-a] [[-p pri] DEVICE]\n\n"
1769 "\tStart swapping on [DEVICE]\n"
1770 " -a\tStart swapping on all swap devices\n"
1771 " -p pri\tSet priority of swap device\n"
1772 " -s\tShow summary\n");
1776 static int main_swapon(int argc, char **argv)
1783 struct probe_info *pr;
1789 while ((ch = getopt(argc, argv, "ap:s")) != -1) {
1792 fp = fopen("/proc/swaps", "r");
1796 ULOG_ERR("failed to open /proc/swaps\n");
1799 while (getline(&lineptr, &s, fp) > 0)
1800 printf("%s", lineptr);
1807 vlist_for_each_element(&devices, dev, node) {
1809 if (strcmp(pr->type, "swap"))
1811 if (swapon(pr->dev, 0))
1812 ULOG_ERR("failed to swapon %s\n", pr->dev);
1818 flags = ((pri << SWAP_FLAG_PRIO_SHIFT) & SWAP_FLAG_PRIO_MASK) | SWAP_FLAG_PREFER;
1821 return swapon_usage();
1825 if (optind != (argc - 1))
1826 return swapon_usage();
1828 if (stat(argv[optind], &st) || (!S_ISBLK(st.st_mode) && !S_ISREG(st.st_mode))) {
1829 ULOG_ERR("%s is not a block device or file\n", argv[optind]);
1832 err = swapon(argv[optind], flags);
1834 ULOG_ERR("failed to swapon %s (%d)\n", argv[optind], err);
1841 static int main_swapoff(int argc, char **argv)
1844 ULOG_ERR("Usage: swapoff [-a] [DEVICE]\n\n"
1845 "\tStop swapping on DEVICE\n"
1846 " -a\tStop swapping on all swap devices\n");
1850 if (!strcmp(argv[1], "-a")) {
1851 FILE *fp = fopen("/proc/swaps", "r");
1855 ULOG_ERR("failed to open /proc/swaps\n");
1858 if (fgets(line, sizeof(line), fp))
1859 while (fgets(line, sizeof(line), fp)) {
1860 char *end = strchr(line, ' ');
1866 err = swapoff(line);
1868 ULOG_ERR("failed to swapoff %s (%d)\n", line, err);
1875 if (stat(argv[1], &s) || (!S_ISBLK(s.st_mode) && !S_ISREG(s.st_mode))) {
1876 ULOG_ERR("%s is not a block device or file\n", argv[1]);
1879 err = swapoff(argv[1]);
1881 ULOG_ERR("failed to swapoff %s (%d)\n", argv[1], err);
1889 int main(int argc, char **argv)
1891 char *base = basename(*argv);
1895 ulog_open(-1, -1, "block");
1896 ulog_threshold(LOG_NOTICE);
1898 if (!strcmp(base, "swapon"))
1899 return main_swapon(argc, argv);
1901 if (!strcmp(base, "swapoff"))
1902 return main_swapoff(argc, argv);
1904 if ((argc > 1) && !strcmp(base, "block")) {
1905 if (!strcmp(argv[1], "info"))
1906 return main_info(argc, argv);
1908 if (!strcmp(argv[1], "detect"))
1909 return main_detect(argc, argv);
1911 if (!strcmp(argv[1], "hotplug"))
1912 return main_hotplug(argc, argv);
1914 if (!strcmp(argv[1], "autofs"))
1915 return main_autofs(argc, argv);
1917 if (!strcmp(argv[1], "extroot"))
1918 return main_extroot(argc, argv);
1920 if (!strcmp(argv[1], "mount"))
1921 return main_mount(argc, argv);
1923 if (!strcmp(argv[1], "umount"))
1924 return main_umount(argc, argv);
1926 if (!strcmp(argv[1], "remount")) {
1927 int ret = main_umount(argc, argv);
1930 ret = main_mount(argc, argv);
1935 ULOG_ERR("Usage: block <info|mount|umount|detect>\n");