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
},
39 const struct config_param_list device_attr_list
= {
40 .n_params
= __DEV_ATTR_MAX
,
44 static int __devlock
= 0;
46 void device_lock(void)
51 void device_unlock(void)
55 device_free_unused(NULL
);
58 static int set_device_state(struct device
*dev
, bool state
)
69 simple_device_set_state(struct device
*dev
, bool state
)
73 if (state
&& !dev
->parent
.dev
)
74 dev
->parent
.dev
= system_if_get_parent(dev
);
76 if (dev
->parent
.dev
) {
78 ret
= device_claim(&dev
->parent
);
80 device_release(&dev
->parent
);
85 return set_device_state(dev
, state
);
88 static struct device
*
89 simple_device_create(const char *name
, struct blob_attr
*attr
)
91 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
92 struct device
*dev
= NULL
;
94 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
, blob_data(attr
), blob_len(attr
));
95 dev
= device_get(name
, true);
99 dev
->set_state
= simple_device_set_state
;
100 device_init_settings(dev
, tb
);
105 static void simple_device_free(struct device
*dev
)
108 device_remove_user(&dev
->parent
);
113 const struct device_type simple_device_type
= {
114 .name
= "Network device",
115 .config_params
= &device_attr_list
,
117 .create
= simple_device_create
,
118 .check_state
= system_if_check
,
119 .free
= simple_device_free
,
123 alias_device_set_state(struct device
*dev
, bool state
)
125 struct alias_device
*alias
;
127 alias
= container_of(dev
, struct alias_device
, dev
);
132 return device_claim(&alias
->dep
);
134 device_release(&alias
->dep
);
136 device_remove_user(&alias
->dep
);
140 static struct device
*
141 alias_device_create(const char *name
, struct blob_attr
*attr
)
143 struct alias_device
*alias
;
145 alias
= calloc(1, sizeof(*alias
) + strlen(name
) + 1);
146 strcpy(alias
->name
, name
);
147 alias
->dev
.set_state
= alias_device_set_state
;
148 device_init_virtual(&alias
->dev
, &alias_device_type
, NULL
);
149 alias
->avl
.key
= alias
->name
;
150 avl_insert(&aliases
, &alias
->avl
);
155 static void alias_device_free(struct device
*dev
)
157 struct alias_device
*alias
;
161 alias
= container_of(dev
, struct alias_device
, dev
);
162 avl_delete(&aliases
, &alias
->avl
);
166 static const struct device_type alias_device_type
= {
167 .name
= "Network alias",
168 .create
= alias_device_create
,
169 .free
= alias_device_free
,
173 device_init_settings(struct device
*dev
, struct blob_attr
**tb
)
175 struct blob_attr
*cur
;
176 struct ether_addr
*ea
;
180 if ((cur
= tb
[DEV_ATTR_MTU
])) {
181 dev
->mtu
= blobmsg_get_u32(cur
);
182 dev
->flags
|= DEV_OPT_MTU
;
185 if ((cur
= tb
[DEV_ATTR_TXQUEUELEN
])) {
186 dev
->txqueuelen
= blobmsg_get_u32(cur
);
187 dev
->flags
|= DEV_OPT_TXQUEUELEN
;
190 if ((cur
= tb
[DEV_ATTR_MACADDR
])) {
191 ea
= ether_aton(blob_data(cur
));
193 memcpy(dev
->macaddr
, ea
, sizeof(dev
->macaddr
));
194 dev
->flags
|= DEV_OPT_MACADDR
;
199 static void __init
dev_init(void)
201 avl_init(&devices
, avl_strcmp
, true, NULL
);
202 avl_init(&aliases
, avl_strcmp
, false, NULL
);
205 static void device_broadcast_event(struct device
*dev
, enum device_event ev
)
207 struct device_user
*dep
, *tmp
;
209 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
218 alias_notify_device(const char *name
, struct device
*dev
)
220 struct alias_device
*alias
;
224 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
228 alias
->cleanup
= !dev
;
230 if (dev
!= alias
->dep
.dev
) {
231 device_remove_user(&alias
->dep
);
232 strcpy(alias
->dev
.ifname
, dev
->ifname
);
233 device_add_user(&alias
->dep
, dev
);
237 device_set_present(&alias
->dev
, !!dev
);
239 if (!dev
&& alias
->dep
.dev
&& !alias
->dep
.dev
->active
)
240 device_remove_user(&alias
->dep
);
245 int device_claim(struct device_user
*dep
)
247 struct device
*dev
= dep
->dev
;
254 D(DEVICE
, "Claim %s %s, new refcount: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
+ 1);
255 if (++dev
->active
!= 1)
258 device_broadcast_event(dev
, DEV_EVENT_SETUP
);
259 ret
= dev
->set_state(dev
, true);
261 device_broadcast_event(dev
, DEV_EVENT_UP
);
263 D(DEVICE
, "claim device %s failed: %d\n", dev
->ifname
, ret
);
265 dep
->claimed
= false;
271 void device_release(struct device_user
*dep
)
273 struct device
*dev
= dep
->dev
;
278 dep
->claimed
= false;
280 D(DEVICE
, "Release %s %s, new refcount: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
);
281 assert(dev
->active
>= 0);
286 device_broadcast_event(dev
, DEV_EVENT_TEARDOWN
);
287 dev
->set_state(dev
, false);
288 device_broadcast_event(dev
, DEV_EVENT_DOWN
);
291 int device_check_state(struct device
*dev
)
293 if (!dev
->type
->check_state
)
296 return dev
->type
->check_state(dev
);
299 void device_init_virtual(struct device
*dev
, const struct device_type
*type
, const char *name
)
305 strncpy(dev
->ifname
, name
, IFNAMSIZ
);
307 D(DEVICE
, "Initialize device '%s'\n", dev
->ifname
);
308 INIT_LIST_HEAD(&dev
->users
);
312 int device_init(struct device
*dev
, const struct device_type
*type
, const char *ifname
)
316 device_init_virtual(dev
, type
, ifname
);
319 dev
->set_state
= set_device_state
;
321 dev
->avl
.key
= dev
->ifname
;
323 ret
= avl_insert(&devices
, &dev
->avl
);
327 system_if_clear_state(dev
);
328 device_check_state(dev
);
333 static struct device
*
334 device_create_default(const char *name
, bool external
)
338 D(DEVICE
, "Create simple device '%s'\n", name
);
339 dev
= calloc(1, sizeof(*dev
));
340 dev
->external
= external
;
341 dev
->set_state
= simple_device_set_state
;
342 device_init(dev
, &simple_device_type
, name
);
343 dev
->default_config
= true;
347 static struct device
*
348 device_alias_get(const char *name
)
350 struct alias_device
*alias
;
352 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
356 return alias_device_create(name
, NULL
);
360 device_get(const char *name
, int create
)
364 if (strchr(name
, '.'))
365 return get_vlan_device_chain(name
, create
);
368 return device_alias_get(name
+ 1);
370 dev
= avl_find_element(&devices
, name
, dev
, avl
);
377 return device_create_default(name
, create
> 1);
381 device_delete(struct device
*dev
)
386 D(DEVICE
, "Delete device '%s' from list\n", dev
->ifname
);
387 avl_delete(&devices
, &dev
->avl
);
391 void device_cleanup(struct device
*dev
)
393 struct device_user
*dep
, *tmp
;
395 D(DEVICE
, "Clean up device '%s'\n", dev
->ifname
);
396 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
400 dep
->cb(dep
, DEV_EVENT_REMOVE
);
407 void device_set_present(struct device
*dev
, bool state
)
409 if (dev
->present
== state
)
412 D(DEVICE
, "%s '%s' %s present\n", dev
->type
->name
, dev
->ifname
, state
? "is now" : "is no longer" );
413 dev
->present
= state
;
414 device_broadcast_event(dev
, state
? DEV_EVENT_ADD
: DEV_EVENT_REMOVE
);
417 void device_add_user(struct device_user
*dep
, struct device
*dev
)
420 list_add_tail(&dep
->list
, &dev
->users
);
421 if (dep
->cb
&& dev
->present
) {
422 dep
->cb(dep
, DEV_EVENT_ADD
);
424 dep
->cb(dep
, DEV_EVENT_UP
);
429 __device_free_unused(struct device
*dev
)
431 if (!list_empty(&dev
->users
) || dev
->current_config
|| __devlock
)
437 void device_remove_user(struct device_user
*dep
)
439 struct device
*dev
= dep
->dev
;
444 dep
->hotplug
= false;
448 list_del(&dep
->list
);
450 __device_free_unused(dev
);
454 device_free_unused(struct device
*dev
)
459 return __device_free_unused(dev
);
461 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
)
462 __device_free_unused(dev
);
466 device_init_pending(void)
468 struct device
*dev
, *tmp
;
470 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
471 if (!dev
->config_pending
)
474 dev
->type
->config_init(dev
);
475 dev
->config_pending
= false;
479 static enum dev_change_type
480 device_reload_config(struct device
*dev
, struct blob_attr
*attr
)
482 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
483 const struct config_param_list
*cfg
= dev
->type
->config_params
;
485 if (config_check_equal(dev
->config
, attr
, cfg
))
486 return DEV_CONFIG_NO_CHANGE
;
488 if (cfg
== &device_attr_list
) {
489 memset(tb
, 0, sizeof(tb
));
492 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
,
493 blob_data(attr
), blob_len(attr
));
495 device_init_settings(dev
, tb
);
496 return DEV_CONFIG_APPLIED
;
498 return DEV_CONFIG_RECREATE
;
502 device_set_config(struct device
*dev
, const struct device_type
*type
,
503 struct blob_attr
*attr
)
505 if (type
!= dev
->type
)
506 return DEV_CONFIG_RECREATE
;
508 if (dev
->type
->reload
)
509 return dev
->type
->reload(dev
, attr
);
511 return device_reload_config(dev
, attr
);
515 device_replace(struct device
*dev
, struct device
*odev
)
517 struct device_user
*dep
, *tmp
;
518 bool present
= odev
->present
;
521 device_set_present(odev
, false);
523 list_for_each_entry_safe(dep
, tmp
, &odev
->users
, list
) {
525 list_move_tail(&dep
->list
, &dev
->users
);
531 device_set_present(dev
, true);
535 device_reset_config(void)
539 avl_for_each_element(&devices
, dev
, avl
)
540 dev
->current_config
= false;
544 device_reset_old(void)
546 struct device
*dev
, *tmp
, *ndev
;
548 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
549 if (dev
->current_config
|| dev
->default_config
)
552 if (dev
->type
!= &simple_device_type
)
555 ndev
= device_create_default(dev
->ifname
, dev
->external
);
556 device_replace(ndev
, dev
);
561 device_create(const char *name
, const struct device_type
*type
,
562 struct blob_attr
*config
)
564 struct device
*odev
= NULL
, *dev
;
565 enum dev_change_type change
;
567 config
= config_memdup(config
);
571 odev
= device_get(name
, false);
573 odev
->current_config
= true;
574 change
= device_set_config(odev
, type
, config
);
576 case DEV_CONFIG_APPLIED
:
577 D(DEVICE
, "Device '%s': config applied\n", odev
->ifname
);
579 odev
->config
= config
;
581 device_set_present(odev
, false);
582 device_set_present(odev
, true);
585 case DEV_CONFIG_NO_CHANGE
:
586 D(DEVICE
, "Device '%s': no configuration change\n", odev
->ifname
);
589 case DEV_CONFIG_RECREATE
:
590 D(DEVICE
, "Device '%s': recreate device\n", odev
->ifname
);
595 D(DEVICE
, "Create new device '%s' (%s)\n", name
, type
->name
);
597 dev
= type
->create(name
, config
);
601 dev
->current_config
= true;
602 dev
->config
= config
;
604 device_replace(dev
, odev
);
606 if (!config_init
&& dev
->config_pending
)
607 type
->config_init(dev
);
613 device_dump_status(struct blob_buf
*b
, struct device
*dev
)
618 avl_for_each_element(&devices
, dev
, avl
) {
621 c
= blobmsg_open_table(b
, dev
->ifname
);
622 device_dump_status(b
, dev
);
623 blobmsg_close_table(b
, c
);
632 blobmsg_add_string(b
, "type", dev
->type
->name
);
633 blobmsg_add_u8(b
, "up", !!dev
->active
);
634 if (dev
->type
->dump_info
)
635 dev
->type
->dump_info(dev
, b
);
637 s
= blobmsg_open_table(b
, "statistics");
638 if (dev
->type
->dump_stats
)
639 dev
->type
->dump_stats(dev
, b
);
641 system_if_dump_stats(dev
, b
);
642 blobmsg_close_table(b
, s
);