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
);
119 const struct device_type simple_device_type
= {
120 .name
= "Network device",
121 .config_params
= &device_attr_list
,
123 .create
= simple_device_create
,
124 .check_state
= system_if_check
,
125 .free
= simple_device_free
,
129 alias_device_set_state(struct device
*dev
, bool state
)
131 struct alias_device
*alias
;
133 alias
= container_of(dev
, struct alias_device
, dev
);
138 return device_claim(&alias
->dep
);
140 device_release(&alias
->dep
);
142 device_remove_user(&alias
->dep
);
146 static struct device
*
147 alias_device_create(const char *name
, struct blob_attr
*attr
)
149 struct alias_device
*alias
;
151 alias
= calloc(1, sizeof(*alias
) + strlen(name
) + 1);
152 strcpy(alias
->name
, name
);
153 alias
->dev
.set_state
= alias_device_set_state
;
154 device_init_virtual(&alias
->dev
, &alias_device_type
, NULL
);
155 alias
->avl
.key
= alias
->name
;
156 avl_insert(&aliases
, &alias
->avl
);
161 static void alias_device_free(struct device
*dev
)
163 struct alias_device
*alias
;
167 alias
= container_of(dev
, struct alias_device
, dev
);
168 avl_delete(&aliases
, &alias
->avl
);
172 static const struct device_type alias_device_type
= {
173 .name
= "Network alias",
174 .create
= alias_device_create
,
175 .free
= alias_device_free
,
179 device_init_settings(struct device
*dev
, struct blob_attr
**tb
)
181 struct blob_attr
*cur
;
182 struct ether_addr
*ea
;
185 dev
->disabled
= false;
187 if ((cur
= tb
[DEV_ATTR_ENABLED
]))
188 device_set_disabled(dev
, !blobmsg_get_bool(cur
));
190 if ((cur
= tb
[DEV_ATTR_MTU
])) {
191 dev
->mtu
= blobmsg_get_u32(cur
);
192 dev
->flags
|= DEV_OPT_MTU
;
195 if ((cur
= tb
[DEV_ATTR_TXQUEUELEN
])) {
196 dev
->txqueuelen
= blobmsg_get_u32(cur
);
197 dev
->flags
|= DEV_OPT_TXQUEUELEN
;
200 if ((cur
= tb
[DEV_ATTR_MACADDR
])) {
201 ea
= ether_aton(blob_data(cur
));
203 memcpy(dev
->macaddr
, ea
, sizeof(dev
->macaddr
));
204 dev
->flags
|= DEV_OPT_MACADDR
;
209 static void __init
dev_init(void)
211 avl_init(&devices
, avl_strcmp
, true, NULL
);
212 avl_init(&aliases
, avl_strcmp
, false, NULL
);
215 static void device_broadcast_event(struct device
*dev
, enum device_event ev
)
217 struct device_user
*dep
, *tmp
;
219 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
228 alias_notify_device(const char *name
, struct device
*dev
)
230 struct alias_device
*alias
;
234 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
238 alias
->cleanup
= !dev
;
240 if (dev
!= alias
->dep
.dev
) {
241 device_remove_user(&alias
->dep
);
242 strcpy(alias
->dev
.ifname
, dev
->ifname
);
243 device_add_user(&alias
->dep
, dev
);
247 device_set_present(&alias
->dev
, !!dev
);
249 if (!dev
&& alias
->dep
.dev
&& !alias
->dep
.dev
->active
)
250 device_remove_user(&alias
->dep
);
255 int device_claim(struct device_user
*dep
)
257 struct device
*dev
= dep
->dev
;
264 D(DEVICE
, "Claim %s %s, new refcount: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
+ 1);
265 if (++dev
->active
!= 1)
268 device_broadcast_event(dev
, DEV_EVENT_SETUP
);
269 ret
= dev
->set_state(dev
, true);
271 device_broadcast_event(dev
, DEV_EVENT_UP
);
273 D(DEVICE
, "claim device %s failed: %d\n", dev
->ifname
, ret
);
275 dep
->claimed
= false;
281 void device_release(struct device_user
*dep
)
283 struct device
*dev
= dep
->dev
;
288 dep
->claimed
= false;
290 D(DEVICE
, "Release %s %s, new refcount: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
);
291 assert(dev
->active
>= 0);
296 device_broadcast_event(dev
, DEV_EVENT_TEARDOWN
);
297 dev
->set_state(dev
, false);
298 device_broadcast_event(dev
, DEV_EVENT_DOWN
);
301 int device_check_state(struct device
*dev
)
303 if (!dev
->type
->check_state
)
306 return dev
->type
->check_state(dev
);
309 void device_init_virtual(struct device
*dev
, const struct device_type
*type
, const char *name
)
315 strncpy(dev
->ifname
, name
, IFNAMSIZ
);
317 D(DEVICE
, "Initialize device '%s'\n", dev
->ifname
);
318 INIT_LIST_HEAD(&dev
->users
);
322 int device_init(struct device
*dev
, const struct device_type
*type
, const char *ifname
)
326 device_init_virtual(dev
, type
, ifname
);
329 dev
->set_state
= set_device_state
;
331 dev
->avl
.key
= dev
->ifname
;
333 ret
= avl_insert(&devices
, &dev
->avl
);
337 system_if_clear_state(dev
);
338 device_check_state(dev
);
343 static struct device
*
344 device_create_default(const char *name
, bool external
)
348 D(DEVICE
, "Create simple device '%s'\n", name
);
349 dev
= calloc(1, sizeof(*dev
));
350 dev
->external
= external
;
351 dev
->set_state
= simple_device_set_state
;
352 device_init(dev
, &simple_device_type
, name
);
353 dev
->default_config
= true;
357 static struct device
*
358 device_alias_get(const char *name
)
360 struct alias_device
*alias
;
362 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
366 return alias_device_create(name
, NULL
);
370 device_get(const char *name
, int create
)
374 if (strchr(name
, '.'))
375 return get_vlan_device_chain(name
, create
);
378 return device_alias_get(name
+ 1);
380 dev
= avl_find_element(&devices
, name
, dev
, avl
);
387 return device_create_default(name
, create
> 1);
391 device_delete(struct device
*dev
)
396 D(DEVICE
, "Delete device '%s' from list\n", dev
->ifname
);
397 avl_delete(&devices
, &dev
->avl
);
401 void device_cleanup(struct device
*dev
)
403 struct device_user
*dep
, *tmp
;
405 D(DEVICE
, "Clean up device '%s'\n", dev
->ifname
);
406 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
410 dep
->cb(dep
, DEV_EVENT_REMOVE
);
417 static void __device_set_present(struct device
*dev
, bool state
)
419 if (dev
->present
== state
)
422 dev
->present
= state
;
423 device_broadcast_event(dev
, state
? DEV_EVENT_ADD
: DEV_EVENT_REMOVE
);
426 void device_set_present(struct device
*dev
, bool state
)
428 if (dev
->sys_present
== state
)
431 dev
->sys_present
= state
;
432 D(DEVICE
, "%s '%s' %s present\n", dev
->type
->name
, dev
->ifname
, state
? "is now" : "is no longer" );
434 if (state
&& dev
->disabled
)
437 __device_set_present(dev
, state
);
441 device_set_disabled(struct device
*dev
, bool value
)
443 dev
->disabled
= value
;
444 if (dev
->sys_present
)
445 __device_set_present(dev
, !value
);
448 void device_add_user(struct device_user
*dep
, struct device
*dev
)
451 list_add_tail(&dep
->list
, &dev
->users
);
452 if (dep
->cb
&& dev
->present
) {
453 dep
->cb(dep
, DEV_EVENT_ADD
);
455 dep
->cb(dep
, DEV_EVENT_UP
);
460 device_free(struct device
*dev
)
463 dev
->type
->free(dev
);
468 __device_free_unused(struct device
*dev
)
470 if (!list_empty(&dev
->users
) || dev
->current_config
|| __devlock
)
476 void device_remove_user(struct device_user
*dep
)
478 struct device
*dev
= dep
->dev
;
483 dep
->hotplug
= false;
487 list_del(&dep
->list
);
489 __device_free_unused(dev
);
493 device_free_unused(struct device
*dev
)
498 return __device_free_unused(dev
);
500 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
)
501 __device_free_unused(dev
);
505 device_init_pending(void)
507 struct device
*dev
, *tmp
;
509 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
510 if (!dev
->config_pending
)
513 dev
->type
->config_init(dev
);
514 dev
->config_pending
= false;
518 static enum dev_change_type
519 device_reload_config(struct device
*dev
, struct blob_attr
*attr
)
521 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
522 const struct config_param_list
*cfg
= dev
->type
->config_params
;
524 if (config_check_equal(dev
->config
, attr
, cfg
))
525 return DEV_CONFIG_NO_CHANGE
;
527 if (cfg
== &device_attr_list
) {
528 memset(tb
, 0, sizeof(tb
));
531 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
,
532 blob_data(attr
), blob_len(attr
));
534 device_init_settings(dev
, tb
);
535 return DEV_CONFIG_APPLIED
;
537 return DEV_CONFIG_RECREATE
;
541 device_set_config(struct device
*dev
, const struct device_type
*type
,
542 struct blob_attr
*attr
)
544 if (type
!= dev
->type
)
545 return DEV_CONFIG_RECREATE
;
547 if (dev
->type
->reload
)
548 return dev
->type
->reload(dev
, attr
);
550 return device_reload_config(dev
, attr
);
554 device_replace(struct device
*dev
, struct device
*odev
)
556 struct device_user
*dep
, *tmp
;
557 bool present
= odev
->present
;
560 device_set_present(odev
, false);
562 list_for_each_entry_safe(dep
, tmp
, &odev
->users
, list
) {
564 list_move_tail(&dep
->list
, &dev
->users
);
570 device_set_present(dev
, true);
574 device_reset_config(void)
578 avl_for_each_element(&devices
, dev
, avl
)
579 dev
->current_config
= false;
583 device_reset_old(void)
585 struct device
*dev
, *tmp
, *ndev
;
587 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
588 if (dev
->current_config
|| dev
->default_config
)
591 if (dev
->type
!= &simple_device_type
)
594 ndev
= device_create_default(dev
->ifname
, dev
->external
);
595 device_replace(ndev
, dev
);
600 device_create(const char *name
, const struct device_type
*type
,
601 struct blob_attr
*config
)
603 struct device
*odev
= NULL
, *dev
;
604 enum dev_change_type change
;
606 config
= config_memdup(config
);
610 odev
= device_get(name
, false);
612 odev
->current_config
= true;
613 change
= device_set_config(odev
, type
, config
);
615 case DEV_CONFIG_APPLIED
:
616 D(DEVICE
, "Device '%s': config applied\n", odev
->ifname
);
618 odev
->config
= config
;
620 device_set_present(odev
, false);
621 device_set_present(odev
, true);
624 case DEV_CONFIG_NO_CHANGE
:
625 D(DEVICE
, "Device '%s': no configuration change\n", odev
->ifname
);
628 case DEV_CONFIG_RECREATE
:
629 D(DEVICE
, "Device '%s': recreate device\n", odev
->ifname
);
634 D(DEVICE
, "Create new device '%s' (%s)\n", name
, type
->name
);
636 dev
= type
->create(name
, config
);
640 dev
->current_config
= true;
641 dev
->config
= config
;
643 device_replace(dev
, odev
);
645 if (!config_init
&& dev
->config_pending
)
646 type
->config_init(dev
);
652 device_dump_status(struct blob_buf
*b
, struct device
*dev
)
657 avl_for_each_element(&devices
, dev
, avl
) {
660 c
= blobmsg_open_table(b
, dev
->ifname
);
661 device_dump_status(b
, dev
);
662 blobmsg_close_table(b
, c
);
671 blobmsg_add_string(b
, "type", dev
->type
->name
);
672 blobmsg_add_u8(b
, "up", !!dev
->active
);
673 if (dev
->type
->dump_info
)
674 dev
->type
->dump_info(dev
, b
);
676 s
= blobmsg_open_table(b
, "statistics");
677 if (dev
->type
->dump_stats
)
678 dev
->type
->dump_stats(dev
, b
);
680 system_if_dump_stats(dev
, b
);
681 blobmsg_close_table(b
, s
);