2 * netifd - network interface daemon
3 * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2
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.
19 #include <sys/types.h>
20 #include <sys/socket.h>
21 #include <net/ethernet.h>
24 #include <netinet/ether.h>
31 static struct avl_tree devices;
32 static bool default_ps = true;
34 static const struct blobmsg_policy dev_attrs[__DEV_ATTR_MAX] = {
35 [DEV_ATTR_TYPE] = { .name = "type", .type = BLOBMSG_TYPE_STRING },
36 [DEV_ATTR_MTU] = { .name = "mtu", .type = BLOBMSG_TYPE_INT32 },
37 [DEV_ATTR_MTU6] = { .name = "mtu6", .type = BLOBMSG_TYPE_INT32 },
38 [DEV_ATTR_MACADDR] = { .name = "macaddr", .type = BLOBMSG_TYPE_STRING },
39 [DEV_ATTR_TXQUEUELEN] = { .name = "txqueuelen", .type = BLOBMSG_TYPE_INT32 },
40 [DEV_ATTR_ENABLED] = { .name = "enabled", .type = BLOBMSG_TYPE_BOOL },
41 [DEV_ATTR_IPV6] = { .name = "ipv6", .type = BLOBMSG_TYPE_BOOL },
42 [DEV_ATTR_PROMISC] = { .name = "promisc", .type = BLOBMSG_TYPE_BOOL },
43 [DEV_ATTR_RPFILTER] = { .name = "rpfilter", .type = BLOBMSG_TYPE_STRING },
44 [DEV_ATTR_ACCEPTLOCAL] = { .name = "acceptlocal", .type = BLOBMSG_TYPE_BOOL },
45 [DEV_ATTR_IGMPVERSION] = { .name = "igmpversion", .type = BLOBMSG_TYPE_INT32 },
46 [DEV_ATTR_MLDVERSION] = { .name = "mldversion", .type = BLOBMSG_TYPE_INT32 },
47 [DEV_ATTR_NEIGHREACHABLETIME] = { .name = "neighreachabletime", .type = BLOBMSG_TYPE_INT32 },
48 [DEV_ATTR_RPS] = { .name = "rps", .type = BLOBMSG_TYPE_BOOL },
49 [DEV_ATTR_XPS] = { .name = "xps", .type = BLOBMSG_TYPE_BOOL },
50 [DEV_ATTR_DADTRANSMITS] = { .name = "dadtransmits", .type = BLOBMSG_TYPE_INT32 },
51 [DEV_ATTR_MULTICAST_TO_UNICAST] = { .name = "multicast_to_unicast", .type = BLOBMSG_TYPE_BOOL },
52 [DEV_ATTR_MULTICAST_ROUTER] = { .name = "multicast_router", .type = BLOBMSG_TYPE_INT32 },
55 const struct uci_blob_param_list device_attr_list = {
56 .n_params = __DEV_ATTR_MAX,
60 static int __devlock = 0;
62 void device_lock(void)
67 void device_unlock(void)
71 device_free_unused(NULL);
74 static int set_device_state(struct device *dev, bool state)
77 /* Get ifindex for all devices being enabled so a valid */
78 /* ifindex is in place avoiding possible race conditions */
79 device_set_ifindex(dev, system_if_resolve(dev));
92 simple_device_set_state(struct device *dev, bool state)
97 pdev = dev->parent.dev;
99 pdev = system_if_get_parent(dev);
101 device_add_user(&dev->parent, pdev);
106 ret = device_claim(&dev->parent);
108 device_release(&dev->parent);
113 return set_device_state(dev, state);
116 static struct device *
117 simple_device_create(const char *name, struct blob_attr *attr)
119 struct blob_attr *tb[__DEV_ATTR_MAX];
120 struct device *dev = NULL;
122 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb, blob_data(attr), blob_len(attr));
123 dev = device_get(name, true);
127 dev->set_state = simple_device_set_state;
128 device_init_settings(dev, tb);
133 static void simple_device_free(struct device *dev)
136 device_remove_user(&dev->parent);
140 const struct device_type simple_device_type = {
141 .name = "Network device",
142 .config_params = &device_attr_list,
144 .create = simple_device_create,
145 .check_state = system_if_check,
146 .free = simple_device_free,
150 device_merge_settings(struct device *dev, struct device_settings *n)
152 struct device_settings *os = &dev->orig_settings;
153 struct device_settings *s = &dev->settings;
155 memset(n, 0, sizeof(*n));
156 n->mtu = s->flags & DEV_OPT_MTU ? s->mtu : os->mtu;
157 n->mtu6 = s->flags & DEV_OPT_MTU6 ? s->mtu6 : os->mtu6;
158 n->txqueuelen = s->flags & DEV_OPT_TXQUEUELEN ?
159 s->txqueuelen : os->txqueuelen;
161 (s->flags & DEV_OPT_MACADDR ? s->macaddr : os->macaddr),
163 n->ipv6 = s->flags & DEV_OPT_IPV6 ? s->ipv6 : os->ipv6;
164 n->promisc = s->flags & DEV_OPT_PROMISC ? s->promisc : os->promisc;
165 n->rpfilter = s->flags & DEV_OPT_RPFILTER ? s->rpfilter : os->rpfilter;
166 n->acceptlocal = s->flags & DEV_OPT_ACCEPTLOCAL ? s->acceptlocal : os->acceptlocal;
167 n->igmpversion = s->flags & DEV_OPT_IGMPVERSION ? s->igmpversion : os->igmpversion;
168 n->mldversion = s->flags & DEV_OPT_MLDVERSION ? s->mldversion : os->mldversion;
169 n->neigh4reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
170 s->neigh4reachabletime : os->neigh4reachabletime;
171 n->neigh6reachabletime = s->flags & DEV_OPT_NEIGHREACHABLETIME ?
172 s->neigh6reachabletime : os->neigh6reachabletime;
173 n->dadtransmits = s->flags & DEV_OPT_DADTRANSMITS ?
174 s->dadtransmits : os->dadtransmits;
175 n->multicast_to_unicast = s->multicast_to_unicast;
176 n->multicast_router = s->multicast_router;
177 n->flags = s->flags | os->flags;
181 device_init_settings(struct device *dev, struct blob_attr **tb)
183 struct device_settings *s = &dev->settings;
184 struct blob_attr *cur;
185 struct ether_addr *ea;
186 bool disabled = false;
189 if ((cur = tb[DEV_ATTR_ENABLED]))
190 disabled = !blobmsg_get_bool(cur);
192 if ((cur = tb[DEV_ATTR_MTU])) {
193 s->mtu = blobmsg_get_u32(cur);
194 s->flags |= DEV_OPT_MTU;
197 if ((cur = tb[DEV_ATTR_MTU6])) {
198 s->mtu6 = blobmsg_get_u32(cur);
199 s->flags |= DEV_OPT_MTU6;
202 if ((cur = tb[DEV_ATTR_TXQUEUELEN])) {
203 s->txqueuelen = blobmsg_get_u32(cur);
204 s->flags |= DEV_OPT_TXQUEUELEN;
207 if ((cur = tb[DEV_ATTR_MACADDR])) {
208 ea = ether_aton(blobmsg_data(cur));
210 memcpy(s->macaddr, ea, 6);
211 s->flags |= DEV_OPT_MACADDR;
215 if ((cur = tb[DEV_ATTR_IPV6])) {
216 s->ipv6 = blobmsg_get_bool(cur);
217 s->flags |= DEV_OPT_IPV6;
220 if ((cur = tb[DEV_ATTR_PROMISC])) {
221 s->promisc = blobmsg_get_bool(cur);
222 s->flags |= DEV_OPT_PROMISC;
225 if ((cur = tb[DEV_ATTR_RPFILTER])) {
226 if (system_resolve_rpfilter(blobmsg_data(cur), &s->rpfilter))
227 s->flags |= DEV_OPT_RPFILTER;
229 DPRINTF("Failed to resolve rpfilter: %s\n", (char *) blobmsg_data(cur));
232 if ((cur = tb[DEV_ATTR_ACCEPTLOCAL])) {
233 s->acceptlocal = blobmsg_get_bool(cur);
234 s->flags |= DEV_OPT_ACCEPTLOCAL;
237 if ((cur = tb[DEV_ATTR_IGMPVERSION])) {
238 s->igmpversion = blobmsg_get_u32(cur);
239 if (s->igmpversion >= 1 && s->igmpversion <= 3)
240 s->flags |= DEV_OPT_IGMPVERSION;
242 DPRINTF("Failed to resolve igmpversion: %d\n", blobmsg_get_u32(cur));
245 if ((cur = tb[DEV_ATTR_MLDVERSION])) {
246 s->mldversion = blobmsg_get_u32(cur);
247 if (s->mldversion >= 1 && s->mldversion <= 2)
248 s->flags |= DEV_OPT_MLDVERSION;
250 DPRINTF("Failed to resolve mldversion: %d\n", blobmsg_get_u32(cur));
253 if ((cur = tb[DEV_ATTR_NEIGHREACHABLETIME])) {
254 s->neigh6reachabletime = s->neigh4reachabletime = blobmsg_get_u32(cur);
255 s->flags |= DEV_OPT_NEIGHREACHABLETIME;
258 if ((cur = tb[DEV_ATTR_RPS])) {
259 s->rps = blobmsg_get_bool(cur);
260 s->flags |= DEV_OPT_RPS;
265 if ((cur = tb[DEV_ATTR_XPS])) {
266 s->xps = blobmsg_get_bool(cur);
267 s->flags |= DEV_OPT_XPS;
272 if ((cur = tb[DEV_ATTR_DADTRANSMITS])) {
273 s->dadtransmits = blobmsg_get_u32(cur);
274 s->flags |= DEV_OPT_DADTRANSMITS;
277 if ((cur = tb[DEV_ATTR_MULTICAST_TO_UNICAST])) {
278 s->multicast_to_unicast = blobmsg_get_bool(cur);
279 s->flags |= DEV_OPT_MULTICAST_TO_UNICAST;
282 if ((cur = tb[DEV_ATTR_MULTICAST_ROUTER])) {
283 s->multicast_router = blobmsg_get_u32(cur);
284 if (s->multicast_router <= 2)
285 s->flags |= DEV_OPT_MULTICAST_ROUTER;
287 DPRINTF("Invalid value: %d - (Use 0: never, 1: learn, 2: always)\n", blobmsg_get_u32(cur));
290 device_set_disabled(dev, disabled);
293 static void __init dev_init(void)
295 avl_init(&devices, avl_strcmp, true, NULL);
298 static int device_broadcast_cb(void *ctx, struct safe_list *list)
300 struct device_user *dep = container_of(list, struct device_user, list);
303 /* device might have been removed by an earlier callback */
312 void device_broadcast_event(struct device *dev, enum device_event ev)
316 safe_list_for_each(&dev->aliases, device_broadcast_cb, &dev_ev);
317 safe_list_for_each(&dev->users, device_broadcast_cb, &dev_ev);
320 int device_claim(struct device_user *dep)
322 struct device *dev = dep->dev;
329 D(DEVICE, "Claim %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active + 1);
330 if (++dev->active != 1)
333 device_broadcast_event(dev, DEV_EVENT_SETUP);
335 /* Get ifindex for external claimed devices so a valid */
336 /* ifindex is in place avoiding possible race conditions */
337 device_set_ifindex(dev, system_if_resolve(dev));
341 ret = dev->set_state(dev, true);
344 device_broadcast_event(dev, DEV_EVENT_UP);
346 D(DEVICE, "claim %s %s failed: %d\n", dev->type->name, dev->ifname, ret);
348 dep->claimed = false;
354 void device_release(struct device_user *dep)
356 struct device *dev = dep->dev;
361 dep->claimed = false;
363 D(DEVICE, "Release %s %s, new active count: %d\n", dev->type->name, dev->ifname, dev->active);
364 assert(dev->active >= 0);
369 device_broadcast_event(dev, DEV_EVENT_TEARDOWN);
371 dev->set_state(dev, false);
372 device_broadcast_event(dev, DEV_EVENT_DOWN);
375 int device_check_state(struct device *dev)
377 if (!dev->type->check_state)
378 return simple_device_type.check_state(dev);
380 return dev->type->check_state(dev);
383 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name)
389 strncpy(dev->ifname, name, IFNAMSIZ);
391 D(DEVICE, "Initialize device '%s'\n", dev->ifname);
392 INIT_SAFE_LIST(&dev->users);
393 INIT_SAFE_LIST(&dev->aliases);
397 dev->set_state = set_device_state;
400 int device_init(struct device *dev, const struct device_type *type, const char *ifname)
404 device_init_virtual(dev, type, ifname);
406 dev->avl.key = dev->ifname;
408 ret = avl_insert(&devices, &dev->avl);
412 system_if_clear_state(dev);
413 device_check_state(dev);
414 dev->settings.rps = default_ps;
415 dev->settings.xps = default_ps;
420 static struct device *
421 device_create_default(const char *name, bool external)
425 if (!external && system_if_force_external(name))
428 D(DEVICE, "Create simple device '%s'\n", name);
429 dev = calloc(1, sizeof(*dev));
430 dev->external = external;
431 dev->set_state = simple_device_set_state;
432 device_init(dev, &simple_device_type, name);
433 dev->default_config = true;
435 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
440 device_get(const char *name, int create)
444 if (strchr(name, '.'))
445 return get_vlan_device_chain(name, create);
448 return device_alias_get(name + 1);
450 dev = avl_find_element(&devices, name, dev, avl);
452 if (create > 1 && !dev->external) {
453 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
454 dev->external = true;
455 device_set_present(dev, true);
463 return device_create_default(name, create > 1);
467 device_delete(struct device *dev)
472 D(DEVICE, "Delete device '%s' from list\n", dev->ifname);
473 avl_delete(&devices, &dev->avl);
477 static int device_cleanup_cb(void *ctx, struct safe_list *list)
479 struct device_user *dep = container_of(list, struct device_user, list);
481 dep->cb(dep, DEV_EVENT_REMOVE);
487 void device_cleanup(struct device *dev)
489 D(DEVICE, "Clean up device '%s'\n", dev->ifname);
490 safe_list_for_each(&dev->users, device_cleanup_cb, NULL);
491 safe_list_for_each(&dev->aliases, device_cleanup_cb, NULL);
495 static void __device_set_present(struct device *dev, bool state)
497 if (dev->present == state)
500 dev->present = state;
501 device_broadcast_event(dev, state ? DEV_EVENT_ADD : DEV_EVENT_REMOVE);
505 device_refresh_present(struct device *dev)
507 bool state = dev->sys_present;
509 if (dev->disabled || dev->deferred)
512 __device_set_present(dev, state);
515 void device_set_present(struct device *dev, bool state)
517 if (dev->sys_present == state)
520 D(DEVICE, "%s '%s' %s present\n", dev->type->name, dev->ifname, state ? "is now" : "is no longer" );
521 dev->sys_present = state;
522 device_refresh_present(dev);
525 void device_set_link(struct device *dev, bool state)
527 if (dev->link_active == state)
530 netifd_log_message(L_NOTICE, "%s '%s' link is %s\n", dev->type->name, dev->ifname, state ? "up" : "down" );
532 dev->link_active = state;
533 device_broadcast_event(dev, state ? DEV_EVENT_LINK_UP : DEV_EVENT_LINK_DOWN);
536 void device_set_ifindex(struct device *dev, int ifindex)
538 if (dev->ifindex == ifindex)
541 dev->ifindex = ifindex;
542 device_broadcast_event(dev, DEV_EVENT_UPDATE_IFINDEX);
545 static int device_refcount(struct device *dev)
547 struct list_head *list;
550 list_for_each(list, &dev->users.list)
553 list_for_each(list, &dev->aliases.list)
560 __device_add_user(struct device_user *dep, struct device *dev)
562 struct safe_list *head;
567 head = &dev->aliases;
571 safe_list_add(&dep->list, head);
572 D(DEVICE, "Add user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
574 if (dep->cb && dev->present) {
575 dep->cb(dep, DEV_EVENT_ADD);
577 dep->cb(dep, DEV_EVENT_UP);
579 if (dev->link_active)
580 dep->cb(dep, DEV_EVENT_LINK_UP);
584 void device_add_user(struct device_user *dep, struct device *dev)
590 device_remove_user(dep);
595 __device_add_user(dep, dev);
599 device_free(struct device *dev)
604 dev->type->free(dev);
609 __device_free_unused(struct device *dev)
611 if (!safe_list_empty(&dev->users) ||
612 !safe_list_empty(&dev->aliases) ||
613 dev->current_config || __devlock)
619 void device_remove_user(struct device_user *dep)
621 struct device *dev = dep->dev;
626 dep->hotplug = false;
630 safe_list_del(&dep->list);
632 D(DEVICE, "Remove user for device '%s', refcount=%d\n", dev->ifname, device_refcount(dev));
633 __device_free_unused(dev);
637 device_free_unused(struct device *dev)
642 return __device_free_unused(dev);
644 avl_for_each_element_safe(&devices, dev, avl, tmp)
645 __device_free_unused(dev);
649 device_init_pending(void)
651 struct device *dev, *tmp;
653 avl_for_each_element_safe(&devices, dev, avl, tmp) {
654 if (!dev->config_pending)
657 dev->type->config_init(dev);
658 dev->config_pending = false;
662 static enum dev_change_type
663 device_set_config(struct device *dev, const struct device_type *type,
664 struct blob_attr *attr)
666 struct blob_attr *tb[__DEV_ATTR_MAX];
667 const struct uci_blob_param_list *cfg = type->config_params;
669 if (type != dev->type)
670 return DEV_CONFIG_RECREATE;
672 if (dev->type->reload)
673 return dev->type->reload(dev, attr);
675 if (uci_blob_check_equal(dev->config, attr, cfg))
676 return DEV_CONFIG_NO_CHANGE;
678 if (cfg == &device_attr_list) {
679 memset(tb, 0, sizeof(tb));
682 blobmsg_parse(dev_attrs, __DEV_ATTR_MAX, tb,
683 blob_data(attr), blob_len(attr));
685 device_init_settings(dev, tb);
686 return DEV_CONFIG_RESTART;
688 return DEV_CONFIG_RECREATE;
692 device_apply_config(struct device *dev, const struct device_type *type,
693 struct blob_attr *config)
695 enum dev_change_type change;
697 change = device_set_config(dev, type, config);
699 system_if_apply_settings(dev, &dev->settings, dev->settings.flags);
700 change = DEV_CONFIG_APPLIED;
704 case DEV_CONFIG_RESTART:
705 case DEV_CONFIG_APPLIED:
706 D(DEVICE, "Device '%s': config applied\n", dev->ifname);
707 config = blob_memdup(config);
709 dev->config = config;
710 if (change == DEV_CONFIG_RESTART && dev->present) {
711 device_set_present(dev, false);
712 if (dev->active && !dev->external) {
713 dev->set_state(dev, false);
714 dev->set_state(dev, true);
716 device_set_present(dev, true);
719 case DEV_CONFIG_NO_CHANGE:
720 D(DEVICE, "Device '%s': no configuration change\n", dev->ifname);
722 case DEV_CONFIG_RECREATE:
730 device_replace(struct device *dev, struct device *odev)
732 struct device_user *dep, *tmp;
736 device_set_present(odev, false);
738 list_for_each_entry_safe(dep, tmp, &odev->users.list, list.list) {
740 safe_list_del(&dep->list);
741 __device_add_user(dep, dev);
749 device_reset_config(void)
753 avl_for_each_element(&devices, dev, avl)
754 dev->current_config = false;
758 device_reset_old(void)
760 struct device *dev, *tmp, *ndev;
762 avl_for_each_element_safe(&devices, dev, avl, tmp) {
763 if (dev->current_config || dev->default_config)
766 if (dev->type != &simple_device_type)
769 ndev = device_create_default(dev->ifname, dev->external);
773 device_replace(ndev, dev);
778 device_set_default_ps(bool state)
782 if (state == default_ps)
787 avl_for_each_element(&devices, dev, avl) {
788 struct device_settings *s = &dev->settings;
789 unsigned int apply_mask = 0;
791 if (!(s->flags & DEV_OPT_RPS)) {
793 apply_mask |= DEV_OPT_RPS;
796 if (!(s->flags & DEV_OPT_XPS)) {
798 apply_mask |= DEV_OPT_XPS;
804 if (!(dev->external || (dev->present && dev->active)) ||
808 system_if_apply_settings(dev, s, apply_mask);
813 device_create(const char *name, const struct device_type *type,
814 struct blob_attr *config)
816 struct device *odev = NULL, *dev;
817 enum dev_change_type change;
819 odev = device_get(name, false);
821 odev->current_config = true;
822 change = device_apply_config(odev, type, config);
824 case DEV_CONFIG_RECREATE:
825 D(DEVICE, "Device '%s': recreate device\n", odev->ifname);
832 D(DEVICE, "Create new device '%s' (%s)\n", name, type->name);
834 config = blob_memdup(config);
838 dev = type->create(name, config);
842 dev->current_config = true;
843 dev->config = config;
845 device_replace(dev, odev);
847 if (!config_init && dev->config_pending) {
848 type->config_init(dev);
849 dev->config_pending = false;
856 device_dump_status(struct blob_buf *b, struct device *dev)
858 struct device_settings st;
862 avl_for_each_element(&devices, dev, avl) {
865 c = blobmsg_open_table(b, dev->ifname);
866 device_dump_status(b, dev);
867 blobmsg_close_table(b, c);
873 blobmsg_add_u8(b, "external", dev->external);
874 blobmsg_add_u8(b, "present", dev->present);
875 blobmsg_add_string(b, "type", dev->type->name);
880 blobmsg_add_u8(b, "up", !!dev->active);
881 blobmsg_add_u8(b, "carrier", !!dev->link_active);
883 if (dev->type->dump_info)
884 dev->type->dump_info(dev, b);
886 system_if_dump_info(dev, b);
889 device_merge_settings(dev, &st);
890 if (st.flags & DEV_OPT_MTU)
891 blobmsg_add_u32(b, "mtu", st.mtu);
892 if (st.flags & DEV_OPT_MTU6)
893 blobmsg_add_u32(b, "mtu6", st.mtu6);
894 if (st.flags & DEV_OPT_MACADDR)
895 blobmsg_add_string(b, "macaddr", format_macaddr(st.macaddr));
896 if (st.flags & DEV_OPT_TXQUEUELEN)
897 blobmsg_add_u32(b, "txqueuelen", st.txqueuelen);
898 if (st.flags & DEV_OPT_IPV6)
899 blobmsg_add_u8(b, "ipv6", st.ipv6);
900 if (st.flags & DEV_OPT_PROMISC)
901 blobmsg_add_u8(b, "promisc", st.promisc);
902 if (st.flags & DEV_OPT_RPFILTER)
903 blobmsg_add_u32(b, "rpfilter", st.rpfilter);
904 if (st.flags & DEV_OPT_ACCEPTLOCAL)
905 blobmsg_add_u8(b, "acceptlocal", st.acceptlocal);
906 if (st.flags & DEV_OPT_IGMPVERSION)
907 blobmsg_add_u32(b, "igmpversion", st.igmpversion);
908 if (st.flags & DEV_OPT_MLDVERSION)
909 blobmsg_add_u32(b, "mldversion", st.mldversion);
910 if (st.flags & DEV_OPT_NEIGHREACHABLETIME) {
911 blobmsg_add_u32(b, "neigh4reachabletime", st.neigh4reachabletime);
912 blobmsg_add_u32(b, "neigh6reachabletime", st.neigh6reachabletime);
914 if (st.flags & DEV_OPT_DADTRANSMITS)
915 blobmsg_add_u32(b, "dadtransmits", st.dadtransmits);
916 if (st.flags & DEV_OPT_MULTICAST_TO_UNICAST)
917 blobmsg_add_u8(b, "multicast_to_unicast", st.multicast_to_unicast);
918 if (st.flags & DEV_OPT_MULTICAST_ROUTER)
919 blobmsg_add_u32(b, "multicast_router", st.multicast_router);
922 s = blobmsg_open_table(b, "statistics");
923 if (dev->type->dump_stats)
924 dev->type->dump_stats(dev, b);
926 system_if_dump_stats(dev, b);
927 blobmsg_close_table(b, s);