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 struct device
*
45 simple_device_create(const char *name
, struct blob_attr
*attr
)
47 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
48 struct device
*dev
= NULL
;
50 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
, blob_data(attr
), blob_len(attr
));
51 dev
= device_get(name
, true);
55 device_init_settings(dev
, tb
);
60 static void simple_device_free(struct device
*dev
)
66 const struct device_type simple_device_type
= {
67 .name
= "Network device",
68 .config_params
= &device_attr_list
,
70 .create
= simple_device_create
,
71 .check_state
= system_if_check
,
72 .free
= simple_device_free
,
76 alias_device_set_state(struct device
*dev
, bool state
)
78 struct alias_device
*alias
;
80 alias
= container_of(dev
, struct alias_device
, dev
);
85 return device_claim(&alias
->dep
);
87 device_release(&alias
->dep
);
89 device_remove_user(&alias
->dep
);
93 static struct device
*
94 alias_device_create(const char *name
, struct blob_attr
*attr
)
96 struct alias_device
*alias
;
98 alias
= calloc(1, sizeof(*alias
) + strlen(name
) + 1);
99 strcpy(alias
->name
, name
);
100 alias
->dev
.set_state
= alias_device_set_state
;
101 device_init_virtual(&alias
->dev
, &alias_device_type
, NULL
);
102 alias
->avl
.key
= alias
->name
;
103 avl_insert(&aliases
, &alias
->avl
);
108 static void alias_device_free(struct device
*dev
)
110 struct alias_device
*alias
;
114 alias
= container_of(dev
, struct alias_device
, dev
);
115 avl_delete(&aliases
, &alias
->avl
);
119 static const struct device_type alias_device_type
= {
120 .name
= "Network alias",
121 .create
= alias_device_create
,
122 .free
= alias_device_free
,
126 device_init_settings(struct device
*dev
, struct blob_attr
**tb
)
128 struct blob_attr
*cur
;
129 struct ether_addr
*ea
;
133 if ((cur
= tb
[DEV_ATTR_MTU
])) {
134 dev
->mtu
= blobmsg_get_u32(cur
);
135 dev
->flags
|= DEV_OPT_MTU
;
138 if ((cur
= tb
[DEV_ATTR_TXQUEUELEN
])) {
139 dev
->txqueuelen
= blobmsg_get_u32(cur
);
140 dev
->flags
|= DEV_OPT_TXQUEUELEN
;
143 if ((cur
= tb
[DEV_ATTR_MACADDR
])) {
144 ea
= ether_aton(blob_data(cur
));
146 memcpy(dev
->macaddr
, ea
, sizeof(dev
->macaddr
));
147 dev
->flags
|= DEV_OPT_MACADDR
;
152 static void __init
dev_init(void)
154 avl_init(&devices
, avl_strcmp
, true, NULL
);
155 avl_init(&aliases
, avl_strcmp
, false, NULL
);
158 static void device_broadcast_event(struct device
*dev
, enum device_event ev
)
160 struct device_user
*dep
, *tmp
;
162 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
171 alias_notify_device(const char *name
, struct device
*dev
)
173 struct alias_device
*alias
;
175 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
179 alias
->cleanup
= !dev
;
181 if (dev
!= alias
->dep
.dev
) {
182 device_remove_user(&alias
->dep
);
183 strcpy(alias
->dev
.ifname
, dev
->ifname
);
184 device_add_user(&alias
->dep
, dev
);
188 device_set_present(&alias
->dev
, !!dev
);
190 if (!dev
&& alias
->dep
.dev
&& !alias
->dep
.dev
->active
)
191 device_remove_user(&alias
->dep
);
194 static int set_device_state(struct device
*dev
, bool state
)
204 int device_claim(struct device_user
*dep
)
206 struct device
*dev
= dep
->dev
;
213 D(DEVICE
, "Claim %s %s, new refcount: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
+ 1);
214 if (++dev
->active
!= 1)
217 device_broadcast_event(dev
, DEV_EVENT_SETUP
);
218 ret
= dev
->set_state(dev
, true);
220 device_broadcast_event(dev
, DEV_EVENT_UP
);
222 D(DEVICE
, "claim device %s failed: %d\n", dev
->ifname
, ret
);
224 dep
->claimed
= false;
230 void device_release(struct device_user
*dep
)
232 struct device
*dev
= dep
->dev
;
237 dep
->claimed
= false;
239 D(DEVICE
, "Release %s %s, new refcount: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
);
240 assert(dev
->active
>= 0);
245 device_broadcast_event(dev
, DEV_EVENT_TEARDOWN
);
246 dev
->set_state(dev
, false);
247 device_broadcast_event(dev
, DEV_EVENT_DOWN
);
250 int device_check_state(struct device
*dev
)
252 if (!dev
->type
->check_state
)
255 return dev
->type
->check_state(dev
);
258 void device_init_virtual(struct device
*dev
, const struct device_type
*type
, const char *name
)
264 strncpy(dev
->ifname
, name
, IFNAMSIZ
);
266 D(DEVICE
, "Initialize device '%s'\n", dev
->ifname
);
267 INIT_LIST_HEAD(&dev
->users
);
271 int device_init(struct device
*dev
, const struct device_type
*type
, const char *ifname
)
275 device_init_virtual(dev
, type
, ifname
);
278 dev
->set_state
= set_device_state
;
280 dev
->avl
.key
= dev
->ifname
;
282 ret
= avl_insert(&devices
, &dev
->avl
);
286 system_if_clear_state(dev
);
287 device_check_state(dev
);
292 static struct device
*
293 device_create_default(const char *name
)
297 D(DEVICE
, "Create simple device '%s'\n", name
);
298 dev
= calloc(1, sizeof(*dev
));
299 device_init(dev
, &simple_device_type
, name
);
300 dev
->default_config
= true;
304 static struct device
*
305 device_alias_get(const char *name
)
307 struct alias_device
*alias
;
309 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
313 return alias_device_create(name
, NULL
);
317 device_get(const char *name
, bool create
)
321 if (strchr(name
, '.'))
322 return get_vlan_device_chain(name
, create
);
325 return device_alias_get(name
+ 1);
327 dev
= avl_find_element(&devices
, name
, dev
, avl
);
334 return device_create_default(name
);
338 device_delete(struct device
*dev
)
343 D(DEVICE
, "Delete device '%s' from list\n", dev
->ifname
);
344 avl_delete(&devices
, &dev
->avl
);
348 void device_cleanup(struct device
*dev
)
350 struct device_user
*dep
, *tmp
;
352 D(DEVICE
, "Clean up device '%s'\n", dev
->ifname
);
353 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
357 dep
->cb(dep
, DEV_EVENT_REMOVE
);
364 void device_set_present(struct device
*dev
, bool state
)
366 if (dev
->present
== state
)
369 D(DEVICE
, "%s '%s' %s present\n", dev
->type
->name
, dev
->ifname
, state
? "is now" : "is no longer" );
370 dev
->present
= state
;
371 device_broadcast_event(dev
, state
? DEV_EVENT_ADD
: DEV_EVENT_REMOVE
);
374 void device_add_user(struct device_user
*dep
, struct device
*dev
)
377 list_add_tail(&dep
->list
, &dev
->users
);
378 if (dep
->cb
&& dev
->present
) {
379 dep
->cb(dep
, DEV_EVENT_ADD
);
381 dep
->cb(dep
, DEV_EVENT_UP
);
386 __device_free_unused(struct device
*dev
)
388 if (!list_empty(&dev
->users
) || dev
->current_config
|| config_init
)
394 void device_remove_user(struct device_user
*dep
)
396 struct device
*dev
= dep
->dev
;
404 list_del(&dep
->list
);
406 __device_free_unused(dev
);
410 device_free_unused(struct device
*dev
)
415 return __device_free_unused(dev
);
417 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
)
418 __device_free_unused(dev
);
422 device_init_pending(void)
424 struct device
*dev
, *tmp
;
426 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
427 if (!dev
->config_pending
)
430 dev
->type
->config_init(dev
);
431 dev
->config_pending
= false;
435 static enum dev_change_type
436 device_reload_config(struct device
*dev
, struct blob_attr
*attr
)
438 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
439 const struct config_param_list
*cfg
= dev
->type
->config_params
;
441 if (config_check_equal(dev
->config
, attr
, cfg
))
442 return DEV_CONFIG_NO_CHANGE
;
444 if (cfg
== &device_attr_list
) {
445 memset(tb
, 0, sizeof(tb
));
448 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
,
449 blob_data(attr
), blob_len(attr
));
451 device_init_settings(dev
, tb
);
452 return DEV_CONFIG_APPLIED
;
454 return DEV_CONFIG_RECREATE
;
458 device_set_config(struct device
*dev
, const struct device_type
*type
,
459 struct blob_attr
*attr
)
461 if (type
!= dev
->type
)
462 return DEV_CONFIG_RECREATE
;
464 if (dev
->type
->reload
)
465 return dev
->type
->reload(dev
, attr
);
467 return device_reload_config(dev
, attr
);
471 device_replace(struct device
*dev
, struct device
*odev
)
473 struct device_user
*dep
, *tmp
;
474 bool present
= odev
->present
;
477 device_set_present(odev
, false);
479 list_for_each_entry_safe(dep
, tmp
, &odev
->users
, list
) {
481 list_move_tail(&dep
->list
, &dev
->users
);
487 device_set_present(dev
, true);
491 device_reset_config(void)
495 avl_for_each_element(&devices
, dev
, avl
)
496 dev
->current_config
= false;
500 device_reset_old(void)
502 struct device
*dev
, *tmp
, *ndev
;
504 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
505 if (dev
->current_config
|| dev
->default_config
)
508 if (dev
->type
!= &simple_device_type
)
511 ndev
= device_create_default(dev
->ifname
);
512 device_replace(ndev
, dev
);
517 device_create(const char *name
, const struct device_type
*type
,
518 struct blob_attr
*config
)
520 struct device
*odev
= NULL
, *dev
;
521 enum dev_change_type change
;
523 config
= config_memdup(config
);
527 odev
= device_get(name
, false);
529 odev
->current_config
= true;
530 change
= device_set_config(odev
, type
, config
);
532 case DEV_CONFIG_APPLIED
:
533 D(DEVICE
, "Device '%s': config applied\n", odev
->ifname
);
535 odev
->config
= config
;
537 device_set_present(odev
, false);
538 device_set_present(odev
, true);
541 case DEV_CONFIG_NO_CHANGE
:
542 D(DEVICE
, "Device '%s': no configuration change\n", odev
->ifname
);
545 case DEV_CONFIG_RECREATE
:
546 D(DEVICE
, "Device '%s': recreate device\n", odev
->ifname
);
551 D(DEVICE
, "Create new device '%s' (%s)\n", name
, type
->name
);
553 dev
= type
->create(name
, config
);
557 dev
->current_config
= true;
558 dev
->config
= config
;
560 device_replace(dev
, odev
);
562 if (!config_init
&& dev
->config_pending
)
563 type
->config_init(dev
);
569 device_dump_status(struct blob_buf
*b
, struct device
*dev
)
574 avl_for_each_element(&devices
, dev
, avl
) {
577 c
= blobmsg_open_table(b
, dev
->ifname
);
578 device_dump_status(b
, dev
);
579 blobmsg_close_table(b
, c
);
588 blobmsg_add_string(b
, "type", dev
->type
->name
);
589 blobmsg_add_u8(b
, "up", !!dev
->active
);
590 if (dev
->type
->dump_info
)
591 dev
->type
->dump_info(dev
, b
);
593 s
= blobmsg_open_table(b
, "statistics");
594 if (dev
->type
->dump_stats
)
595 dev
->type
->dump_stats(dev
, b
);
597 system_if_dump_stats(dev
, b
);
598 blobmsg_close_table(b
, s
);