7 #include <sys/socket.h>
8 #include <net/ethernet.h>
11 #include <netinet/ether.h>
18 static struct avl_tree devices
;
20 static const struct blobmsg_policy dev_attrs
[__DEV_ATTR_MAX
] = {
21 [DEV_ATTR_TYPE
] = { "type", BLOBMSG_TYPE_STRING
},
22 [DEV_ATTR_NAME
] = { "name", BLOBMSG_TYPE_STRING
},
23 [DEV_ATTR_IFNAME
] = { "ifname", BLOBMSG_TYPE_ARRAY
},
24 [DEV_ATTR_MTU
] = { "mtu", BLOBMSG_TYPE_INT32
},
25 [DEV_ATTR_MACADDR
] = { "macaddr", BLOBMSG_TYPE_STRING
},
26 [DEV_ATTR_TXQUEUELEN
] = { "txqueuelen", BLOBMSG_TYPE_INT32
},
29 const struct config_param_list device_attr_list
= {
30 .n_params
= __DEV_ATTR_MAX
,
34 static struct device
*
35 simple_device_create(struct blob_attr
*attr
)
37 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
38 struct device
*dev
= NULL
;
41 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
, blob_data(attr
), blob_len(attr
));
42 if (!tb
[DEV_ATTR_NAME
])
45 name
= blobmsg_data(tb
[DEV_ATTR_NAME
]);
49 dev
= device_get(name
, true);
53 device_init_settings(dev
, tb
);
58 static void simple_device_free(struct device
*dev
)
64 const struct device_type simple_device_type
= {
65 .name
= "Network device",
66 .config_params
= &device_attr_list
,
68 .create
= simple_device_create
,
69 .check_state
= system_if_check
,
70 .free
= simple_device_free
,
74 device_init_settings(struct device
*dev
, struct blob_attr
**tb
)
76 struct blob_attr
*cur
;
77 struct ether_addr
*ea
;
81 if ((cur
= tb
[DEV_ATTR_MTU
])) {
82 dev
->mtu
= blobmsg_get_u32(cur
);
83 dev
->flags
|= DEV_OPT_MTU
;
86 if ((cur
= tb
[DEV_ATTR_TXQUEUELEN
])) {
87 dev
->txqueuelen
= blobmsg_get_u32(cur
);
88 dev
->flags
|= DEV_OPT_TXQUEUELEN
;
91 if ((cur
= tb
[DEV_ATTR_MACADDR
])) {
92 ea
= ether_aton(blob_data(cur
));
94 memcpy(dev
->macaddr
, ea
, sizeof(dev
->macaddr
));
95 dev
->flags
|= DEV_OPT_MACADDR
;
100 static void __init
dev_init(void)
102 avl_init(&devices
, avl_strcmp
, true, NULL
);
105 static void device_broadcast_event(struct device
*dev
, enum device_event ev
)
107 struct device_user
*dep
, *tmp
;
109 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
117 static int set_device_state(struct device
*dev
, bool state
)
127 int device_claim(struct device_user
*dep
)
129 struct device
*dev
= dep
->dev
;
136 D(DEVICE
, "claim device %s, new refcount: %d\n", dev
->ifname
, dev
->active
+ 1);
137 if (++dev
->active
!= 1)
140 device_broadcast_event(dev
, DEV_EVENT_SETUP
);
141 ret
= dev
->set_state(dev
, true);
143 device_broadcast_event(dev
, DEV_EVENT_UP
);
145 D(DEVICE
, "claim device %s failed: %d\n", dev
->ifname
, ret
);
147 dep
->claimed
= false;
153 void device_release(struct device_user
*dep
)
155 struct device
*dev
= dep
->dev
;
160 dep
->claimed
= false;
162 D(DEVICE
, "release device %s, new refcount: %d\n", dev
->ifname
, dev
->active
);
163 assert(dev
->active
>= 0);
168 device_broadcast_event(dev
, DEV_EVENT_TEARDOWN
);
169 dev
->set_state(dev
, false);
170 device_broadcast_event(dev
, DEV_EVENT_DOWN
);
173 int device_check_state(struct device
*dev
)
175 if (!dev
->type
->check_state
)
178 return dev
->type
->check_state(dev
);
181 void device_init_virtual(struct device
*dev
, const struct device_type
*type
, const char *name
)
187 strncpy(dev
->ifname
, name
, IFNAMSIZ
);
189 D(DEVICE
, "Initialize device '%s'\n", dev
->ifname
);
190 INIT_LIST_HEAD(&dev
->users
);
194 int device_init(struct device
*dev
, const struct device_type
*type
, const char *ifname
)
198 device_init_virtual(dev
, type
, ifname
);
201 dev
->set_state
= set_device_state
;
203 dev
->avl
.key
= dev
->ifname
;
205 ret
= avl_insert(&devices
, &dev
->avl
);
209 device_check_state(dev
);
214 static struct device
*
215 device_create_default(const char *name
)
219 D(DEVICE
, "Create simple device '%s'\n", name
);
220 dev
= calloc(1, sizeof(*dev
));
221 device_init(dev
, &simple_device_type
, name
);
222 dev
->default_config
= true;
227 device_get(const char *name
, bool create
)
231 if (strchr(name
, '.'))
232 return get_vlan_device_chain(name
, create
);
234 dev
= avl_find_element(&devices
, name
, dev
, avl
);
241 return device_create_default(name
);
245 device_delete(struct device
*dev
)
250 D(DEVICE
, "Delete device '%s' from list\n", dev
->ifname
);
251 avl_delete(&devices
, &dev
->avl
);
255 void device_cleanup(struct device
*dev
)
257 struct device_user
*dep
, *tmp
;
259 D(DEVICE
, "Clean up device '%s'\n", dev
->ifname
);
260 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
264 dep
->cb(dep
, DEV_EVENT_REMOVE
);
271 void device_set_present(struct device
*dev
, bool state
)
273 if (dev
->present
== state
)
276 D(DEVICE
, "Device '%s' %s present\n", dev
->ifname
, state
? "is now" : "is no longer" );
277 dev
->present
= state
;
278 device_broadcast_event(dev
, state
? DEV_EVENT_ADD
: DEV_EVENT_REMOVE
);
281 void device_add_user(struct device_user
*dep
, struct device
*dev
)
284 list_add_tail(&dep
->list
, &dev
->users
);
285 if (dep
->cb
&& dev
->present
) {
286 dep
->cb(dep
, DEV_EVENT_ADD
);
288 dep
->cb(dep
, DEV_EVENT_UP
);
293 __device_free_unused(struct device
*dev
)
295 if (!list_empty(&dev
->users
) || dev
->current_config
)
301 void device_remove_user(struct device_user
*dep
)
303 struct device
*dev
= dep
->dev
;
308 list_del(&dep
->list
);
310 __device_free_unused(dev
);
314 device_free_unused(struct device
*dev
)
319 return __device_free_unused(dev
);
321 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
)
322 __device_free_unused(dev
);
326 device_init_pending(void)
328 struct device
*dev
, *tmp
;
330 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
331 if (!dev
->config_pending
)
334 dev
->type
->config_init(dev
);
335 dev
->config_pending
= false;
340 device_reload_config(struct device
*dev
, struct blob_attr
*attr
)
342 struct blob_attr
*tb
[__DEV_ATTR_MAX
], *tb1
[__DEV_ATTR_MAX
];
343 const struct config_param_list
*params
= dev
->type
->config_params
;
345 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
,
346 blob_data(attr
), blob_len(attr
));
348 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb1
,
349 blob_data(dev
->config
), blob_len(dev
->config
));
351 memset(tb1
, 0, sizeof(tb1
));
353 if (!config_diff(tb
, tb1
, dev
->type
->config_params
, NULL
))
354 return DEV_CONFIG_NO_CHANGE
;
356 device_init_settings(dev
, tb
);
357 if (params
== &device_attr_list
)
358 return DEV_CONFIG_APPLIED
;
360 return DEV_CONFIG_RECREATE
;
363 static enum dev_change_type
364 device_check_config(struct device
*dev
, const struct device_type
*type
,
365 struct blob_attr
*attr
)
367 if (type
!= dev
->type
)
368 return DEV_CONFIG_RECREATE
;
370 if (dev
->type
->reload
)
371 return dev
->type
->reload(dev
, attr
);
373 return device_reload_config(dev
, attr
);
377 device_replace(struct device
*dev
, struct device
*odev
)
379 struct device_user
*dep
, *tmp
;
380 bool present
= odev
->present
;
383 device_set_present(odev
, false);
385 list_for_each_entry_safe(dep
, tmp
, &odev
->users
, list
) {
387 list_move_tail(&dep
->list
, &dev
->users
);
393 device_set_present(dev
, true);
397 device_reset_config(void)
401 avl_for_each_element(&devices
, dev
, avl
)
402 dev
->current_config
= false;
406 device_reset_old(void)
408 struct device
*dev
, *tmp
, *ndev
;
410 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
411 if (dev
->current_config
|| dev
->default_config
)
414 if (dev
->type
!= &simple_device_type
)
417 ndev
= device_create_default(dev
->ifname
);
418 device_replace(ndev
, dev
);
423 device_create(const char *name
, const struct device_type
*type
,
424 struct blob_attr
*config
)
426 struct device
*odev
= NULL
, *dev
;
427 enum dev_change_type change
;
429 D(DEVICE
, "Create new device '%s' (%s)\n", name
, type
->name
);
430 config
= config_memdup(config
);
434 odev
= device_get(name
, false);
436 odev
->current_config
= true;
437 change
= device_check_config(odev
, type
, config
);
439 case DEV_CONFIG_APPLIED
:
440 D(DEVICE
, "Device '%s': config applied\n", odev
->ifname
);
442 odev
->config
= config
;
444 device_set_present(odev
, false);
445 device_set_present(odev
, true);
448 case DEV_CONFIG_NO_CHANGE
:
449 D(DEVICE
, "Device '%s': no configuration change\n", odev
->ifname
);
452 case DEV_CONFIG_RECREATE
:
453 D(DEVICE
, "Device '%s': recreate device\n", odev
->ifname
);
459 dev
= type
->create(config
);
463 dev
->current_config
= true;
464 dev
->config
= config
;
466 device_replace(dev
, odev
);
468 if (!config_init
&& dev
->config_pending
)
469 type
->config_init(dev
);