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 struct device
*
59 simple_device_create(const char *name
, struct blob_attr
*attr
)
61 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
62 struct device
*dev
= NULL
;
64 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
, blob_data(attr
), blob_len(attr
));
65 dev
= device_get(name
, true);
69 device_init_settings(dev
, tb
);
74 static void simple_device_free(struct device
*dev
)
80 const struct device_type simple_device_type
= {
81 .name
= "Network device",
82 .config_params
= &device_attr_list
,
84 .create
= simple_device_create
,
85 .check_state
= system_if_check
,
86 .free
= simple_device_free
,
90 alias_device_set_state(struct device
*dev
, bool state
)
92 struct alias_device
*alias
;
94 alias
= container_of(dev
, struct alias_device
, dev
);
99 return device_claim(&alias
->dep
);
101 device_release(&alias
->dep
);
103 device_remove_user(&alias
->dep
);
107 static struct device
*
108 alias_device_create(const char *name
, struct blob_attr
*attr
)
110 struct alias_device
*alias
;
112 alias
= calloc(1, sizeof(*alias
) + strlen(name
) + 1);
113 strcpy(alias
->name
, name
);
114 alias
->dev
.set_state
= alias_device_set_state
;
115 device_init_virtual(&alias
->dev
, &alias_device_type
, NULL
);
116 alias
->avl
.key
= alias
->name
;
117 avl_insert(&aliases
, &alias
->avl
);
122 static void alias_device_free(struct device
*dev
)
124 struct alias_device
*alias
;
128 alias
= container_of(dev
, struct alias_device
, dev
);
129 avl_delete(&aliases
, &alias
->avl
);
133 static const struct device_type alias_device_type
= {
134 .name
= "Network alias",
135 .create
= alias_device_create
,
136 .free
= alias_device_free
,
140 device_init_settings(struct device
*dev
, struct blob_attr
**tb
)
142 struct blob_attr
*cur
;
143 struct ether_addr
*ea
;
147 if ((cur
= tb
[DEV_ATTR_MTU
])) {
148 dev
->mtu
= blobmsg_get_u32(cur
);
149 dev
->flags
|= DEV_OPT_MTU
;
152 if ((cur
= tb
[DEV_ATTR_TXQUEUELEN
])) {
153 dev
->txqueuelen
= blobmsg_get_u32(cur
);
154 dev
->flags
|= DEV_OPT_TXQUEUELEN
;
157 if ((cur
= tb
[DEV_ATTR_MACADDR
])) {
158 ea
= ether_aton(blob_data(cur
));
160 memcpy(dev
->macaddr
, ea
, sizeof(dev
->macaddr
));
161 dev
->flags
|= DEV_OPT_MACADDR
;
166 static void __init
dev_init(void)
168 avl_init(&devices
, avl_strcmp
, true, NULL
);
169 avl_init(&aliases
, avl_strcmp
, false, NULL
);
172 static void device_broadcast_event(struct device
*dev
, enum device_event ev
)
174 struct device_user
*dep
, *tmp
;
176 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
185 alias_notify_device(const char *name
, struct device
*dev
)
187 struct alias_device
*alias
;
191 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
195 alias
->cleanup
= !dev
;
197 if (dev
!= alias
->dep
.dev
) {
198 device_remove_user(&alias
->dep
);
199 strcpy(alias
->dev
.ifname
, dev
->ifname
);
200 device_add_user(&alias
->dep
, dev
);
204 device_set_present(&alias
->dev
, !!dev
);
206 if (!dev
&& alias
->dep
.dev
&& !alias
->dep
.dev
->active
)
207 device_remove_user(&alias
->dep
);
212 static int set_device_state(struct device
*dev
, bool state
)
222 int device_claim(struct device_user
*dep
)
224 struct device
*dev
= dep
->dev
;
231 D(DEVICE
, "Claim %s %s, new refcount: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
+ 1);
232 if (++dev
->active
!= 1)
235 device_broadcast_event(dev
, DEV_EVENT_SETUP
);
236 ret
= dev
->set_state(dev
, true);
238 device_broadcast_event(dev
, DEV_EVENT_UP
);
240 D(DEVICE
, "claim device %s failed: %d\n", dev
->ifname
, ret
);
242 dep
->claimed
= false;
248 void device_release(struct device_user
*dep
)
250 struct device
*dev
= dep
->dev
;
255 dep
->claimed
= false;
257 D(DEVICE
, "Release %s %s, new refcount: %d\n", dev
->type
->name
, dev
->ifname
, dev
->active
);
258 assert(dev
->active
>= 0);
263 device_broadcast_event(dev
, DEV_EVENT_TEARDOWN
);
264 dev
->set_state(dev
, false);
265 device_broadcast_event(dev
, DEV_EVENT_DOWN
);
268 int device_check_state(struct device
*dev
)
270 if (!dev
->type
->check_state
)
273 return dev
->type
->check_state(dev
);
276 void device_init_virtual(struct device
*dev
, const struct device_type
*type
, const char *name
)
282 strncpy(dev
->ifname
, name
, IFNAMSIZ
);
284 D(DEVICE
, "Initialize device '%s'\n", dev
->ifname
);
285 INIT_LIST_HEAD(&dev
->users
);
289 int device_init(struct device
*dev
, const struct device_type
*type
, const char *ifname
)
293 device_init_virtual(dev
, type
, ifname
);
296 dev
->set_state
= set_device_state
;
298 dev
->avl
.key
= dev
->ifname
;
300 ret
= avl_insert(&devices
, &dev
->avl
);
304 system_if_clear_state(dev
);
305 device_check_state(dev
);
310 static struct device
*
311 device_create_default(const char *name
, bool external
)
315 D(DEVICE
, "Create simple device '%s'\n", name
);
316 dev
= calloc(1, sizeof(*dev
));
317 dev
->external
= external
;
318 device_init(dev
, &simple_device_type
, name
);
319 dev
->default_config
= true;
323 static struct device
*
324 device_alias_get(const char *name
)
326 struct alias_device
*alias
;
328 alias
= avl_find_element(&aliases
, name
, alias
, avl
);
332 return alias_device_create(name
, NULL
);
336 device_get(const char *name
, int create
)
340 if (strchr(name
, '.'))
341 return get_vlan_device_chain(name
, create
);
344 return device_alias_get(name
+ 1);
346 dev
= avl_find_element(&devices
, name
, dev
, avl
);
353 return device_create_default(name
, create
> 1);
357 device_delete(struct device
*dev
)
362 D(DEVICE
, "Delete device '%s' from list\n", dev
->ifname
);
363 avl_delete(&devices
, &dev
->avl
);
367 void device_cleanup(struct device
*dev
)
369 struct device_user
*dep
, *tmp
;
371 D(DEVICE
, "Clean up device '%s'\n", dev
->ifname
);
372 list_for_each_entry_safe(dep
, tmp
, &dev
->users
, list
) {
376 dep
->cb(dep
, DEV_EVENT_REMOVE
);
383 void device_set_present(struct device
*dev
, bool state
)
385 if (dev
->present
== state
)
388 D(DEVICE
, "%s '%s' %s present\n", dev
->type
->name
, dev
->ifname
, state
? "is now" : "is no longer" );
389 dev
->present
= state
;
390 device_broadcast_event(dev
, state
? DEV_EVENT_ADD
: DEV_EVENT_REMOVE
);
393 void device_add_user(struct device_user
*dep
, struct device
*dev
)
396 list_add_tail(&dep
->list
, &dev
->users
);
397 if (dep
->cb
&& dev
->present
) {
398 dep
->cb(dep
, DEV_EVENT_ADD
);
400 dep
->cb(dep
, DEV_EVENT_UP
);
405 __device_free_unused(struct device
*dev
)
407 if (!list_empty(&dev
->users
) || dev
->current_config
|| __devlock
)
413 void device_remove_user(struct device_user
*dep
)
415 struct device
*dev
= dep
->dev
;
420 dep
->hotplug
= false;
424 list_del(&dep
->list
);
426 __device_free_unused(dev
);
430 device_free_unused(struct device
*dev
)
435 return __device_free_unused(dev
);
437 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
)
438 __device_free_unused(dev
);
442 device_init_pending(void)
444 struct device
*dev
, *tmp
;
446 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
447 if (!dev
->config_pending
)
450 dev
->type
->config_init(dev
);
451 dev
->config_pending
= false;
455 static enum dev_change_type
456 device_reload_config(struct device
*dev
, struct blob_attr
*attr
)
458 struct blob_attr
*tb
[__DEV_ATTR_MAX
];
459 const struct config_param_list
*cfg
= dev
->type
->config_params
;
461 if (config_check_equal(dev
->config
, attr
, cfg
))
462 return DEV_CONFIG_NO_CHANGE
;
464 if (cfg
== &device_attr_list
) {
465 memset(tb
, 0, sizeof(tb
));
468 blobmsg_parse(dev_attrs
, __DEV_ATTR_MAX
, tb
,
469 blob_data(attr
), blob_len(attr
));
471 device_init_settings(dev
, tb
);
472 return DEV_CONFIG_APPLIED
;
474 return DEV_CONFIG_RECREATE
;
478 device_set_config(struct device
*dev
, const struct device_type
*type
,
479 struct blob_attr
*attr
)
481 if (type
!= dev
->type
)
482 return DEV_CONFIG_RECREATE
;
484 if (dev
->type
->reload
)
485 return dev
->type
->reload(dev
, attr
);
487 return device_reload_config(dev
, attr
);
491 device_replace(struct device
*dev
, struct device
*odev
)
493 struct device_user
*dep
, *tmp
;
494 bool present
= odev
->present
;
497 device_set_present(odev
, false);
499 list_for_each_entry_safe(dep
, tmp
, &odev
->users
, list
) {
501 list_move_tail(&dep
->list
, &dev
->users
);
507 device_set_present(dev
, true);
511 device_reset_config(void)
515 avl_for_each_element(&devices
, dev
, avl
)
516 dev
->current_config
= false;
520 device_reset_old(void)
522 struct device
*dev
, *tmp
, *ndev
;
524 avl_for_each_element_safe(&devices
, dev
, avl
, tmp
) {
525 if (dev
->current_config
|| dev
->default_config
)
528 if (dev
->type
!= &simple_device_type
)
531 ndev
= device_create_default(dev
->ifname
, dev
->external
);
532 device_replace(ndev
, dev
);
537 device_create(const char *name
, const struct device_type
*type
,
538 struct blob_attr
*config
)
540 struct device
*odev
= NULL
, *dev
;
541 enum dev_change_type change
;
543 config
= config_memdup(config
);
547 odev
= device_get(name
, false);
549 odev
->current_config
= true;
550 change
= device_set_config(odev
, type
, config
);
552 case DEV_CONFIG_APPLIED
:
553 D(DEVICE
, "Device '%s': config applied\n", odev
->ifname
);
555 odev
->config
= config
;
557 device_set_present(odev
, false);
558 device_set_present(odev
, true);
561 case DEV_CONFIG_NO_CHANGE
:
562 D(DEVICE
, "Device '%s': no configuration change\n", odev
->ifname
);
565 case DEV_CONFIG_RECREATE
:
566 D(DEVICE
, "Device '%s': recreate device\n", odev
->ifname
);
571 D(DEVICE
, "Create new device '%s' (%s)\n", name
, type
->name
);
573 dev
= type
->create(name
, config
);
577 dev
->current_config
= true;
578 dev
->config
= config
;
580 device_replace(dev
, odev
);
582 if (!config_init
&& dev
->config_pending
)
583 type
->config_init(dev
);
589 device_dump_status(struct blob_buf
*b
, struct device
*dev
)
594 avl_for_each_element(&devices
, dev
, avl
) {
597 c
= blobmsg_open_table(b
, dev
->ifname
);
598 device_dump_status(b
, dev
);
599 blobmsg_close_table(b
, c
);
608 blobmsg_add_string(b
, "type", dev
->type
->name
);
609 blobmsg_add_u8(b
, "up", !!dev
->active
);
610 if (dev
->type
->dump_info
)
611 dev
->type
->dump_info(dev
, b
);
613 s
= blobmsg_open_table(b
, "statistics");
614 if (dev
->type
->dump_stats
)
615 dev
->type
->dump_stats(dev
, b
);
617 system_if_dump_stats(dev
, b
);
618 blobmsg_close_table(b
, s
);