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
)
74 pdev
= dev
->parent
.dev
;
76 pdev
= system_if_get_parent(dev
);
78 device_add_user(&dev
->parent
, pdev
);
83 ret
= device_claim(&dev
->parent
);
85 device_release(&dev
->parent
);
90 return set_device_state(dev
, state
);
93 static struct device
*
94 simple_device_create(const char *name
, struct blob_attr
*attr
)
96 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
97 struct device
*dev
= NULL
;
99 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
, blob_data(attr
), blob_len(attr
));
100 dev
= device_get(name
, true);
104 dev
->set_state
= simple_device_set_state
;
105 device_init_settings(dev
, tb
);
110 static void simple_device_free(struct device
*dev
)
113 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
;
166 alias
= container_of(dev
, struct alias_device
, dev
);
167 avl_delete(&aliases
, &alias
->avl
);
171 static const struct device_type alias_device_type
= {
172 .name
= "Network alias",
173 .create
= alias_device_create
,
174 .free
= alias_device_free
,
178 device_init_settings(struct device
*dev
, struct blob_attr
**tb
)
180 struct blob_attr
*cur
;
181 struct ether_addr
*ea
;
185 if ((cur
= tb
[DEV_ATTR_MTU
])) {
186 dev
->mtu
= blobmsg_get_u32(cur
);
187 dev
->flags
|= DEV_OPT_MTU
;
190 if ((cur
= tb
[DEV_ATTR_TXQUEUELEN
])) {
191 dev
->txqueuelen
= blobmsg_get_u32(cur
);
192 dev
->flags
|= DEV_OPT_TXQUEUELEN
;
195 if ((cur
= tb
[DEV_ATTR_MACADDR
])) {
196 ea
= ether_aton(blob_data(cur
));
198 memcpy(dev
->macaddr
, ea
, sizeof(dev
->macaddr
));
199 dev
->flags
|= DEV_OPT_MACADDR
;
204 static void __init
dev_init(void)
206 avl_init(&devices
, avl_strcmp
, true, NULL
);
207 avl_init(&aliases
, avl_strcmp
, false, NULL
);
210 static void device_broadcast_event(struct device
*dev
, enum device_event ev
)
212 struct device_user
*dep
, *tmp
;
214 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
223 alias_notify_device(const char *name
, struct device
*dev
)
225 struct alias_device
*alias
;
229 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
233 alias
->cleanup
= !dev
;
235 if (dev
!= alias
->dep
.dev
) {
236 device_remove_user(&alias
->dep
);
237 strcpy(alias
->dev
.ifname
, dev
->ifname
);
238 device_add_user(&alias
->dep
, dev
);
242 device_set_present(&alias
->dev
, !!dev
);
244 if (!dev
&& alias
->dep
.dev
&& !alias
->dep
.dev
->active
)
245 device_remove_user(&alias
->dep
);
250 int device_claim(struct device_user
*dep
)
252 struct device
*dev
= dep
->dev
;
259 D(DEVICE
, "Claim %s %s, new refcount: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
+ 1);
260 if (++dev
->active
!= 1)
263 device_broadcast_event(dev
, DEV_EVENT_SETUP
);
264 ret
= dev
->set_state(dev
, true);
266 device_broadcast_event(dev
, DEV_EVENT_UP
);
268 D(DEVICE
, "claim device %s failed: %d\n", dev
->ifname
, ret
);
270 dep
->claimed
= false;
276 void device_release(struct device_user
*dep
)
278 struct device
*dev
= dep
->dev
;
283 dep
->claimed
= false;
285 D(DEVICE
, "Release %s %s, new refcount: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
);
286 assert(dev
->active
>= 0);
291 device_broadcast_event(dev
, DEV_EVENT_TEARDOWN
);
292 dev
->set_state(dev
, false);
293 device_broadcast_event(dev
, DEV_EVENT_DOWN
);
296 int device_check_state(struct device
*dev
)
298 if (!dev
->type
->check_state
)
301 return dev
->type
->check_state(dev
);
304 void device_init_virtual(struct device
*dev
, const struct device_type
*type
, const char *name
)
310 strncpy(dev
->ifname
, name
, IFNAMSIZ
);
312 D(DEVICE
, "Initialize device '%s'\n", dev
->ifname
);
313 INIT_LIST_HEAD(&dev
->users
);
317 int device_init(struct device
*dev
, const struct device_type
*type
, const char *ifname
)
321 device_init_virtual(dev
, type
, ifname
);
324 dev
->set_state
= set_device_state
;
326 dev
->avl
.key
= dev
->ifname
;
328 ret
= avl_insert(&devices
, &dev
->avl
);
332 system_if_clear_state(dev
);
333 device_check_state(dev
);
338 static struct device
*
339 device_create_default(const char *name
, bool external
)
343 D(DEVICE
, "Create simple device '%s'\n", name
);
344 dev
= calloc(1, sizeof(*dev
));
345 dev
->external
= external
;
346 dev
->set_state
= simple_device_set_state
;
347 device_init(dev
, &simple_device_type
, name
);
348 dev
->default_config
= true;
352 static struct device
*
353 device_alias_get(const char *name
)
355 struct alias_device
*alias
;
357 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
361 return alias_device_create(name
, NULL
);
365 device_get(const char *name
, int create
)
369 if (strchr(name
, '.'))
370 return get_vlan_device_chain(name
, create
);
373 return device_alias_get(name
+ 1);
375 dev
= avl_find_element(&devices
, name
, dev
, avl
);
382 return device_create_default(name
, create
> 1);
386 device_delete(struct device
*dev
)
391 D(DEVICE
, "Delete device '%s' from list\n", dev
->ifname
);
392 avl_delete(&devices
, &dev
->avl
);
396 void device_cleanup(struct device
*dev
)
398 struct device_user
*dep
, *tmp
;
400 D(DEVICE
, "Clean up device '%s'\n", dev
->ifname
);
401 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
405 dep
->cb(dep
, DEV_EVENT_REMOVE
);
412 void device_set_present(struct device
*dev
, bool state
)
414 if (dev
->present
== state
)
417 D(DEVICE
, "%s '%s' %s present\n", dev
->type
->name
, dev
->ifname
, state
? "is now" : "is no longer" );
418 dev
->present
= state
;
419 device_broadcast_event(dev
, state
? DEV_EVENT_ADD
: DEV_EVENT_REMOVE
);
422 void device_add_user(struct device_user
*dep
, struct device
*dev
)
425 list_add_tail(&dep
->list
, &dev
->users
);
426 if (dep
->cb
&& dev
->present
) {
427 dep
->cb(dep
, DEV_EVENT_ADD
);
429 dep
->cb(dep
, DEV_EVENT_UP
);
434 device_free(struct device
*dev
)
437 dev
->type
->free(dev
);
442 __device_free_unused(struct device
*dev
)
444 if (!list_empty(&dev
->users
) || dev
->current_config
|| __devlock
)
450 void device_remove_user(struct device_user
*dep
)
452 struct device
*dev
= dep
->dev
;
457 dep
->hotplug
= false;
461 list_del(&dep
->list
);
463 __device_free_unused(dev
);
467 device_free_unused(struct device
*dev
)
472 return __device_free_unused(dev
);
474 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
)
475 __device_free_unused(dev
);
479 device_init_pending(void)
481 struct device
*dev
, *tmp
;
483 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
484 if (!dev
->config_pending
)
487 dev
->type
->config_init(dev
);
488 dev
->config_pending
= false;
492 static enum dev_change_type
493 device_reload_config(struct device
*dev
, struct blob_attr
*attr
)
495 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
496 const struct config_param_list
*cfg
= dev
->type
->config_params
;
498 if (config_check_equal(dev
->config
, attr
, cfg
))
499 return DEV_CONFIG_NO_CHANGE
;
501 if (cfg
== &device_attr_list
) {
502 memset(tb
, 0, sizeof(tb
));
505 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
,
506 blob_data(attr
), blob_len(attr
));
508 device_init_settings(dev
, tb
);
509 return DEV_CONFIG_APPLIED
;
511 return DEV_CONFIG_RECREATE
;
515 device_set_config(struct device
*dev
, const struct device_type
*type
,
516 struct blob_attr
*attr
)
518 if (type
!= dev
->type
)
519 return DEV_CONFIG_RECREATE
;
521 if (dev
->type
->reload
)
522 return dev
->type
->reload(dev
, attr
);
524 return device_reload_config(dev
, attr
);
528 device_replace(struct device
*dev
, struct device
*odev
)
530 struct device_user
*dep
, *tmp
;
531 bool present
= odev
->present
;
534 device_set_present(odev
, false);
536 list_for_each_entry_safe(dep
, tmp
, &odev
->users
, list
) {
538 list_move_tail(&dep
->list
, &dev
->users
);
544 device_set_present(dev
, true);
548 device_reset_config(void)
552 avl_for_each_element(&devices
, dev
, avl
)
553 dev
->current_config
= false;
557 device_reset_old(void)
559 struct device
*dev
, *tmp
, *ndev
;
561 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
562 if (dev
->current_config
|| dev
->default_config
)
565 if (dev
->type
!= &simple_device_type
)
568 ndev
= device_create_default(dev
->ifname
, dev
->external
);
569 device_replace(ndev
, dev
);
574 device_create(const char *name
, const struct device_type
*type
,
575 struct blob_attr
*config
)
577 struct device
*odev
= NULL
, *dev
;
578 enum dev_change_type change
;
580 config
= config_memdup(config
);
584 odev
= device_get(name
, false);
586 odev
->current_config
= true;
587 change
= device_set_config(odev
, type
, config
);
589 case DEV_CONFIG_APPLIED
:
590 D(DEVICE
, "Device '%s': config applied\n", odev
->ifname
);
592 odev
->config
= config
;
594 device_set_present(odev
, false);
595 device_set_present(odev
, true);
598 case DEV_CONFIG_NO_CHANGE
:
599 D(DEVICE
, "Device '%s': no configuration change\n", odev
->ifname
);
602 case DEV_CONFIG_RECREATE
:
603 D(DEVICE
, "Device '%s': recreate device\n", odev
->ifname
);
608 D(DEVICE
, "Create new device '%s' (%s)\n", name
, type
->name
);
610 dev
= type
->create(name
, config
);
614 dev
->current_config
= true;
615 dev
->config
= config
;
617 device_replace(dev
, odev
);
619 if (!config_init
&& dev
->config_pending
)
620 type
->config_init(dev
);
626 device_dump_status(struct blob_buf
*b
, struct device
*dev
)
631 avl_for_each_element(&devices
, dev
, avl
) {
634 c
= blobmsg_open_table(b
, dev
->ifname
);
635 device_dump_status(b
, dev
);
636 blobmsg_close_table(b
, c
);
645 blobmsg_add_string(b
, "type", dev
->type
->name
);
646 blobmsg_add_u8(b
, "up", !!dev
->active
);
647 if (dev
->type
->dump_info
)
648 dev
->type
->dump_info(dev
, b
);
650 s
= blobmsg_open_table(b
, "statistics");
651 if (dev
->type
->dump_stats
)
652 dev
->type
->dump_stats(dev
, b
);
654 system_if_dump_stats(dev
, b
);
655 blobmsg_close_table(b
, s
);