7 #include <sys/socket.h>
8 #include <net/ethernet.h>
11 #include <netinet/ether.h>
18 static struct avl_tree devices
;
19 static struct avl_tree aliases
;
24 struct device_user dep
;
29 static const struct device_type alias_device_type
;
31 static const struct blobmsg_policy dev_attrs
[__DEV_ATTR_MAX
] = {
32 [DEV_ATTR_TYPE
] = { "type", BLOBMSG_TYPE_STRING
},
33 [DEV_ATTR_IFNAME
] = { "ifname", BLOBMSG_TYPE_ARRAY
},
34 [DEV_ATTR_MTU
] = { "mtu", BLOBMSG_TYPE_INT32
},
35 [DEV_ATTR_MACADDR
] = { "macaddr", BLOBMSG_TYPE_STRING
},
36 [DEV_ATTR_TXQUEUELEN
] = { "txqueuelen", BLOBMSG_TYPE_INT32
},
37 [DEV_ATTR_ENABLED
] = { "enabled", BLOBMSG_TYPE_BOOL
},
40 const struct config_param_list device_attr_list
= {
41 .n_params
= __DEV_ATTR_MAX
,
45 static int __devlock
= 0;
47 void device_lock(void)
52 void device_unlock(void)
56 device_free_unused(NULL
);
59 static int set_device_state(struct device
*dev
, bool state
)
70 simple_device_set_state(struct device
*dev
, bool state
)
75 pdev
= dev
->parent
.dev
;
77 pdev
= system_if_get_parent(dev
);
79 device_add_user(&dev
->parent
, pdev
);
84 ret
= device_claim(&dev
->parent
);
86 device_release(&dev
->parent
);
91 return set_device_state(dev
, state
);
94 static struct device
*
95 simple_device_create(const char *name
, struct blob_attr
*attr
)
97 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
98 struct device
*dev
= NULL
;
100 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
, blob_data(attr
), blob_len(attr
));
101 dev
= device_get(name
, true);
105 dev
->set_state
= simple_device_set_state
;
106 device_init_settings(dev
, tb
);
111 static void simple_device_free(struct device
*dev
)
114 device_remove_user(&dev
->parent
);
118 const struct device_type simple_device_type
= {
119 .name
= "Network device",
120 .config_params
= &device_attr_list
,
122 .create
= simple_device_create
,
123 .check_state
= system_if_check
,
124 .free
= simple_device_free
,
128 alias_device_set_state(struct device
*dev
, bool state
)
130 struct alias_device
*alias
;
132 alias
= container_of(dev
, struct alias_device
, dev
);
137 return device_claim(&alias
->dep
);
139 device_release(&alias
->dep
);
141 device_remove_user(&alias
->dep
);
145 static struct device
*
146 alias_device_create(const char *name
, struct blob_attr
*attr
)
148 struct alias_device
*alias
;
150 alias
= calloc(1, sizeof(*alias
) + strlen(name
) + 1);
151 strcpy(alias
->name
, name
);
152 alias
->dev
.set_state
= alias_device_set_state
;
153 device_init_virtual(&alias
->dev
, &alias_device_type
, NULL
);
154 alias
->avl
.key
= alias
->name
;
155 avl_insert(&aliases
, &alias
->avl
);
160 static void alias_device_free(struct device
*dev
)
162 struct alias_device
*alias
;
164 alias
= container_of(dev
, struct alias_device
, dev
);
165 avl_delete(&aliases
, &alias
->avl
);
169 static const struct device_type alias_device_type
= {
170 .name
= "Network alias",
171 .create
= alias_device_create
,
172 .free
= alias_device_free
,
176 device_merge_settings(struct device
*dev
, struct device_settings
*n
)
178 struct device_settings
*os
= &dev
->orig_settings
;
179 struct device_settings
*s
= &dev
->settings
;
181 memset(n
, 0, sizeof(*n
));
182 n
->mtu
= s
->flags
& DEV_OPT_MTU
? s
->mtu
: os
->mtu
;
183 n
->txqueuelen
= s
->flags
& DEV_OPT_TXQUEUELEN
?
184 s
->txqueuelen
: os
->txqueuelen
;
186 (s
->flags
& DEV_OPT_MACADDR
? s
->macaddr
: os
->macaddr
),
188 n
->flags
= s
->flags
| os
->flags
;
192 device_init_settings(struct device
*dev
, struct blob_attr
**tb
)
194 struct device_settings
*s
= &dev
->settings
;
195 struct blob_attr
*cur
;
196 struct ether_addr
*ea
;
197 bool disabled
= false;
200 if ((cur
= tb
[DEV_ATTR_ENABLED
]))
201 disabled
= !blobmsg_get_bool(cur
);
203 if ((cur
= tb
[DEV_ATTR_MTU
])) {
204 s
->mtu
= blobmsg_get_u32(cur
);
205 s
->flags
|= DEV_OPT_MTU
;
208 if ((cur
= tb
[DEV_ATTR_TXQUEUELEN
])) {
209 s
->txqueuelen
= blobmsg_get_u32(cur
);
210 s
->flags
|= DEV_OPT_TXQUEUELEN
;
213 if ((cur
= tb
[DEV_ATTR_MACADDR
])) {
214 ea
= ether_aton(blobmsg_data(cur
));
216 memcpy(s
->macaddr
, ea
, 6);
217 s
->flags
|= DEV_OPT_MACADDR
;
221 device_set_disabled(dev
, disabled
);
224 static void __init
dev_init(void)
226 avl_init(&devices
, avl_strcmp
, true, NULL
);
227 avl_init(&aliases
, avl_strcmp
, false, NULL
);
230 static void device_broadcast_event(struct device
*dev
, enum device_event ev
)
232 struct device_user
*dep
, *tmp
;
234 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
243 alias_notify_device(const char *name
, struct device
*dev
)
245 struct alias_device
*alias
;
249 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
253 alias
->cleanup
= !dev
;
255 if (dev
!= alias
->dep
.dev
) {
256 device_remove_user(&alias
->dep
);
257 strcpy(alias
->dev
.ifname
, dev
->ifname
);
258 device_add_user(&alias
->dep
, dev
);
262 device_set_present(&alias
->dev
, !!dev
);
264 if (!dev
&& alias
->dep
.dev
&& !alias
->dep
.dev
->active
)
265 device_remove_user(&alias
->dep
);
270 int device_claim(struct device_user
*dep
)
272 struct device
*dev
= dep
->dev
;
279 D(DEVICE
, "Claim %s %s, new refcount: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
+ 1);
280 if (++dev
->active
!= 1)
283 device_broadcast_event(dev
, DEV_EVENT_SETUP
);
284 ret
= dev
->set_state(dev
, true);
286 device_broadcast_event(dev
, DEV_EVENT_UP
);
288 D(DEVICE
, "claim device %s failed: %d\n", dev
->ifname
, ret
);
290 dep
->claimed
= false;
296 void device_release(struct device_user
*dep
)
298 struct device
*dev
= dep
->dev
;
303 dep
->claimed
= false;
305 D(DEVICE
, "Release %s %s, new refcount: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
);
306 assert(dev
->active
>= 0);
311 device_broadcast_event(dev
, DEV_EVENT_TEARDOWN
);
313 dev
->set_state(dev
, false);
314 device_broadcast_event(dev
, DEV_EVENT_DOWN
);
317 int device_check_state(struct device
*dev
)
319 if (!dev
->type
->check_state
)
322 return dev
->type
->check_state(dev
);
325 void device_init_virtual(struct device
*dev
, const struct device_type
*type
, const char *name
)
331 strncpy(dev
->ifname
, name
, IFNAMSIZ
);
333 D(DEVICE
, "Initialize device '%s'\n", dev
->ifname
);
334 INIT_LIST_HEAD(&dev
->users
);
338 int device_init(struct device
*dev
, const struct device_type
*type
, const char *ifname
)
342 device_init_virtual(dev
, type
, ifname
);
345 dev
->set_state
= set_device_state
;
347 dev
->avl
.key
= dev
->ifname
;
349 ret
= avl_insert(&devices
, &dev
->avl
);
353 system_if_clear_state(dev
);
354 device_check_state(dev
);
359 static struct device
*
360 device_create_default(const char *name
, bool external
)
364 D(DEVICE
, "Create simple device '%s'\n", name
);
365 dev
= calloc(1, sizeof(*dev
));
366 dev
->external
= external
;
367 dev
->set_state
= simple_device_set_state
;
368 device_init(dev
, &simple_device_type
, name
);
369 dev
->default_config
= true;
373 static struct device
*
374 device_alias_get(const char *name
)
376 struct alias_device
*alias
;
378 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
382 return alias_device_create(name
, NULL
);
386 device_get(const char *name
, int create
)
390 if (strchr(name
, '.'))
391 return get_vlan_device_chain(name
, create
);
394 return device_alias_get(name
+ 1);
396 dev
= avl_find_element(&devices
, name
, dev
, avl
);
403 return device_create_default(name
, create
> 1);
407 device_delete(struct device
*dev
)
412 D(DEVICE
, "Delete device '%s' from list\n", dev
->ifname
);
413 avl_delete(&devices
, &dev
->avl
);
417 void device_cleanup(struct device
*dev
)
419 struct device_user
*dep
, *tmp
;
421 D(DEVICE
, "Clean up device '%s'\n", dev
->ifname
);
422 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
426 dep
->cb(dep
, DEV_EVENT_REMOVE
);
433 static void __device_set_present(struct device
*dev
, bool state
)
435 if (dev
->present
== state
)
438 dev
->present
= state
;
439 device_broadcast_event(dev
, state
? DEV_EVENT_ADD
: DEV_EVENT_REMOVE
);
442 void device_set_present(struct device
*dev
, bool state
)
444 if (dev
->sys_present
== state
)
447 dev
->sys_present
= state
;
448 D(DEVICE
, "%s '%s' %s present\n", dev
->type
->name
, dev
->ifname
, state
? "is now" : "is no longer" );
450 if (state
&& dev
->disabled
)
453 __device_set_present(dev
, state
);
457 device_set_disabled(struct device
*dev
, bool value
)
459 dev
->disabled
= value
;
460 if (dev
->sys_present
)
461 __device_set_present(dev
, !value
);
464 void device_add_user(struct device_user
*dep
, struct device
*dev
)
467 device_remove_user(dep
);
473 list_add_tail(&dep
->list
, &dev
->users
);
474 if (dep
->cb
&& dev
->present
) {
475 dep
->cb(dep
, DEV_EVENT_ADD
);
477 dep
->cb(dep
, DEV_EVENT_UP
);
482 device_free(struct device
*dev
)
487 dev
->type
->free(dev
);
492 __device_free_unused(struct device
*dev
)
494 if (!list_empty(&dev
->users
) || dev
->current_config
|| __devlock
)
500 void device_remove_user(struct device_user
*dep
)
502 struct device
*dev
= dep
->dev
;
507 dep
->hotplug
= false;
511 list_del(&dep
->list
);
513 __device_free_unused(dev
);
517 device_free_unused(struct device
*dev
)
522 return __device_free_unused(dev
);
524 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
)
525 __device_free_unused(dev
);
529 device_init_pending(void)
531 struct device
*dev
, *tmp
;
533 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
534 if (!dev
->config_pending
)
537 dev
->type
->config_init(dev
);
538 dev
->config_pending
= false;
542 static enum dev_change_type
543 device_reload_config(struct device
*dev
, struct blob_attr
*attr
)
545 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
546 const struct config_param_list
*cfg
= dev
->type
->config_params
;
548 if (config_check_equal(dev
->config
, attr
, cfg
))
549 return DEV_CONFIG_NO_CHANGE
;
551 if (cfg
== &device_attr_list
) {
552 memset(tb
, 0, sizeof(tb
));
555 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
,
556 blob_data(attr
), blob_len(attr
));
558 device_init_settings(dev
, tb
);
559 return DEV_CONFIG_RESTART
;
561 return DEV_CONFIG_RECREATE
;
565 device_set_config(struct device
*dev
, const struct device_type
*type
,
566 struct blob_attr
*attr
)
568 if (type
!= dev
->type
)
569 return DEV_CONFIG_RECREATE
;
571 if (dev
->type
->reload
)
572 return dev
->type
->reload(dev
, attr
);
574 return device_reload_config(dev
, attr
);
578 device_replace(struct device
*dev
, struct device
*odev
)
580 struct device_user
*dep
, *tmp
;
581 bool present
= odev
->present
;
584 device_set_present(odev
, false);
586 list_for_each_entry_safe(dep
, tmp
, &odev
->users
, list
) {
588 list_move_tail(&dep
->list
, &dev
->users
);
594 device_set_present(dev
, true);
598 device_reset_config(void)
602 avl_for_each_element(&devices
, dev
, avl
)
603 dev
->current_config
= false;
607 device_reset_old(void)
609 struct device
*dev
, *tmp
, *ndev
;
611 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
612 if (dev
->current_config
|| dev
->default_config
)
615 if (dev
->type
!= &simple_device_type
)
618 ndev
= device_create_default(dev
->ifname
, dev
->external
);
619 device_replace(ndev
, dev
);
624 device_create(const char *name
, const struct device_type
*type
,
625 struct blob_attr
*config
)
627 struct device
*odev
= NULL
, *dev
;
628 enum dev_change_type change
;
630 config
= config_memdup(config
);
634 odev
= device_get(name
, false);
636 odev
->current_config
= true;
637 change
= device_set_config(odev
, type
, config
);
639 case DEV_CONFIG_RESTART
:
640 case DEV_CONFIG_APPLIED
:
641 D(DEVICE
, "Device '%s': config applied\n", odev
->ifname
);
643 odev
->config
= config
;
644 if (change
== DEV_CONFIG_RESTART
&& odev
->present
) {
645 device_set_present(odev
, false);
646 device_set_present(odev
, true);
649 case DEV_CONFIG_NO_CHANGE
:
650 D(DEVICE
, "Device '%s': no configuration change\n", odev
->ifname
);
653 case DEV_CONFIG_RECREATE
:
654 D(DEVICE
, "Device '%s': recreate device\n", odev
->ifname
);
659 D(DEVICE
, "Create new device '%s' (%s)\n", name
, type
->name
);
661 dev
= type
->create(name
, config
);
665 dev
->current_config
= true;
666 dev
->config
= config
;
668 device_replace(dev
, odev
);
670 if (!config_init
&& dev
->config_pending
)
671 type
->config_init(dev
);
677 device_dump_status(struct blob_buf
*b
, struct device
*dev
)
679 struct device_settings st
;
683 avl_for_each_element(&devices
, dev
, avl
) {
686 c
= blobmsg_open_table(b
, dev
->ifname
);
687 device_dump_status(b
, dev
);
688 blobmsg_close_table(b
, c
);
697 blobmsg_add_string(b
, "type", dev
->type
->name
);
698 blobmsg_add_u8(b
, "up", !!dev
->active
);
699 if (dev
->type
->dump_info
)
700 dev
->type
->dump_info(dev
, b
);
702 system_if_dump_info(dev
, b
);
705 device_merge_settings(dev
, &st
);
706 if (st
.flags
& DEV_OPT_MTU
)
707 blobmsg_add_u32(b
, "mtu", st
.mtu
);
708 if (st
.flags
& DEV_OPT_MACADDR
)
709 blobmsg_add_string(b
, "macaddr", ether_ntoa((struct ether_addr
*) st
.macaddr
));
710 if (st
.flags
& DEV_OPT_TXQUEUELEN
)
711 blobmsg_add_u32(b
, "txqueuelen", st
.txqueuelen
);
714 s
= blobmsg_open_table(b
, "statistics");
715 if (dev
->type
->dump_stats
)
716 dev
->type
->dump_stats(dev
, b
);
718 system_if_dump_stats(dev
, b
);
719 blobmsg_close_table(b
, s
);