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Sources/netifd/device.h

  1 /*
  2  * netifd - network interface daemon
  3  * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
  4  *
  5  * This program is free software; you can redistribute it and/or modify
  6  * it under the terms of the GNU General Public License version 2
  7  * as published by the Free Software Foundation
  8  *
  9  * This program is distributed in the hope that it will be useful,
 10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 12  * GNU General Public License for more details.
 13  */
 14 #ifndef __NETIFD_DEVICE_H
 15 #define __NETIFD_DEVICE_H
 16 
 17 #include <libubox/avl.h>
 18 #include <libubox/safe_list.h>
 19 #include <netinet/in.h>
 20 
 21 struct device;
 22 struct device_type;
 23 struct device_user;
 24 struct device_hotplug_ops;
 25 struct interface;
 26 
 27 typedef int (*device_state_cb)(struct device *, bool up);
 28 
 29 enum {
 30         DEV_ATTR_TYPE,
 31         DEV_ATTR_MTU,
 32         DEV_ATTR_MTU6,
 33         DEV_ATTR_MACADDR,
 34         DEV_ATTR_TXQUEUELEN,
 35         DEV_ATTR_ENABLED,
 36         DEV_ATTR_IPV6,
 37         DEV_ATTR_PROMISC,
 38         DEV_ATTR_RPFILTER,
 39         DEV_ATTR_ACCEPTLOCAL,
 40         DEV_ATTR_IGMPVERSION,
 41         DEV_ATTR_MLDVERSION,
 42         DEV_ATTR_NEIGHREACHABLETIME,
 43         DEV_ATTR_DADTRANSMITS,
 44         DEV_ATTR_MULTICAST_TO_UNICAST,
 45         DEV_ATTR_MULTICAST_ROUTER,
 46         DEV_ATTR_MULTICAST_FAST_LEAVE,
 47         DEV_ATTR_MULTICAST,
 48         DEV_ATTR_LEARNING,
 49         DEV_ATTR_UNICAST_FLOOD,
 50         DEV_ATTR_NEIGHGCSTALETIME,
 51         DEV_ATTR_SENDREDIRECTS,
 52         DEV_ATTR_NEIGHLOCKTIME,
 53         DEV_ATTR_ISOLATE,
 54         __DEV_ATTR_MAX,
 55 };
 56 
 57 enum dev_change_type {
 58         DEV_CONFIG_NO_CHANGE,
 59         DEV_CONFIG_APPLIED,
 60         DEV_CONFIG_RESTART,
 61         DEV_CONFIG_RECREATE,
 62 };
 63 
 64 struct device_type {
 65         struct list_head list;
 66         const char *name;
 67 
 68         bool bridge_capability;
 69         const char *name_prefix;
 70 
 71         const struct uci_blob_param_list *config_params;
 72 
 73         struct device *(*create)(const char *name, struct device_type *devtype,
 74                 struct blob_attr *attr);
 75         void (*config_init)(struct device *);
 76         enum dev_change_type (*reload)(struct device *, struct blob_attr *);
 77         void (*dump_info)(struct device *, struct blob_buf *buf);
 78         void (*dump_stats)(struct device *, struct blob_buf *buf);
 79         int (*check_state)(struct device *);
 80         void (*free)(struct device *);
 81 };
 82 
 83 enum {
 84         DEV_OPT_MTU                     = (1 << 0),
 85         DEV_OPT_MACADDR                 = (1 << 1),
 86         DEV_OPT_TXQUEUELEN              = (1 << 2),
 87         DEV_OPT_IPV6                    = (1 << 3),
 88         DEV_OPT_PROMISC                 = (1 << 4),
 89         DEV_OPT_RPFILTER                = (1 << 5),
 90         DEV_OPT_ACCEPTLOCAL             = (1 << 6),
 91         DEV_OPT_IGMPVERSION             = (1 << 7),
 92         DEV_OPT_MLDVERSION              = (1 << 8),
 93         DEV_OPT_NEIGHREACHABLETIME      = (1 << 9),
 94         /* 2 bit hole */
 95         DEV_OPT_MTU6                    = (1 << 12),
 96         DEV_OPT_DADTRANSMITS            = (1 << 13),
 97         DEV_OPT_MULTICAST_TO_UNICAST    = (1 << 14),
 98         DEV_OPT_MULTICAST_ROUTER        = (1 << 15),
 99         DEV_OPT_MULTICAST               = (1 << 16),
100         DEV_OPT_LEARNING                = (1 << 17),
101         DEV_OPT_UNICAST_FLOOD           = (1 << 18),
102         DEV_OPT_NEIGHGCSTALETIME        = (1 << 19),
103         DEV_OPT_MULTICAST_FAST_LEAVE    = (1 << 20),
104         DEV_OPT_SENDREDIRECTS           = (1 << 21),
105         DEV_OPT_NEIGHLOCKTIME           = (1 << 22),
106         DEV_OPT_ISOLATE                 = (1 << 23),
107 };
108 
109 /* events broadcasted to all users of a device */
110 enum device_event {
111         DEV_EVENT_ADD,
112         DEV_EVENT_REMOVE,
113 
114         DEV_EVENT_UPDATE_IFNAME,
115         DEV_EVENT_UPDATE_IFINDEX,
116 
117         DEV_EVENT_SETUP,
118         DEV_EVENT_TEARDOWN,
119         DEV_EVENT_UP,
120         DEV_EVENT_DOWN,
121 
122         DEV_EVENT_LINK_UP,
123         DEV_EVENT_LINK_DOWN,
124 
125         /* Topology changed (i.e. bridge member added) */
126         DEV_EVENT_TOPO_CHANGE,
127 
128         __DEV_EVENT_MAX
129 };
130 
131 /*
132  * device dependency with callbacks
133  */
134 struct device_user {
135         struct safe_list list;
136 
137         bool claimed;
138         bool hotplug;
139         bool alias;
140 
141         uint8_t ev_idx[__DEV_EVENT_MAX];
142 
143         struct device *dev;
144         void (*cb)(struct device_user *, enum device_event);
145 };
146 
147 struct device_settings {
148         unsigned int flags;
149         unsigned int valid_flags;
150         unsigned int mtu;
151         unsigned int mtu6;
152         unsigned int txqueuelen;
153         uint8_t macaddr[6];
154         bool ipv6;
155         bool promisc;
156         unsigned int rpfilter;
157         bool acceptlocal;
158         unsigned int igmpversion;
159         unsigned int mldversion;
160         unsigned int neigh4reachabletime;
161         unsigned int neigh6reachabletime;
162         unsigned int neigh4gcstaletime;
163         unsigned int neigh6gcstaletime;
164         int neigh4locktime;
165         unsigned int dadtransmits;
166         bool multicast_to_unicast;
167         unsigned int multicast_router;
168         bool multicast_fast_leave;
169         bool multicast;
170         bool learning;
171         bool unicast_flood;
172         bool sendredirects;
173         bool isolate;
174 };
175 
176 /*
177  * link layer device. typically represents a linux network device.
178  * can be used to support VLANs as well
179  */
180 struct device {
181         struct device_type *type;
182 
183         struct avl_node avl;
184         struct safe_list users;
185         struct safe_list aliases;
186 
187         char ifname[IFNAMSIZ + 1];
188         int ifindex;
189 
190         struct blob_attr *config;
191         bool config_pending;
192         bool sys_present;
193         /* DEV_EVENT_ADD */
194         bool present;
195         /* DEV_EVENT_UP */
196         int active;
197         /* DEV_EVENT_LINK_UP */
198         bool link_active;
199 
200         bool external;
201         bool disabled;
202         bool deferred;
203         bool hidden;
204 
205         bool current_config;
206         bool iface_config;
207         bool default_config;
208         bool wireless;
209         bool wireless_ap;
210         bool wireless_isolate;
211 
212         struct interface *config_iface;
213 
214         /* set interface up or down */
215         device_state_cb set_state;
216 
217         const struct device_hotplug_ops *hotplug_ops;
218 
219         struct device_user parent;
220 
221         struct device_settings orig_settings;
222         struct device_settings settings;
223 };
224 
225 struct device_hotplug_ops {
226         int (*prepare)(struct device *dev);
227         int (*add)(struct device *main, struct device *member);
228         int (*del)(struct device *main, struct device *member);
229 };
230 
231 extern const struct uci_blob_param_list device_attr_list;
232 extern struct device_type simple_device_type;
233 extern struct device_type tunnel_device_type;
234 
235 void device_lock(void);
236 void device_unlock(void);
237 
238 int device_type_add(struct device_type *devtype);
239 struct device_type *device_type_get(const char *tname);
240 struct device *device_create(const char *name, struct device_type *type,
241                              struct blob_attr *config);
242 void device_merge_settings(struct device *dev, struct device_settings *n);
243 void device_init_settings(struct device *dev, struct blob_attr **tb);
244 void device_init_pending(void);
245 
246 enum dev_change_type
247 device_apply_config(struct device *dev, struct device_type *type,
248                     struct blob_attr *config);
249 
250 void device_reset_config(void);
251 void device_reset_old(void);
252 
253 int device_init_virtual(struct device *dev, struct device_type *type, const char *name);
254 int device_init(struct device *dev, struct device_type *type, const char *ifname);
255 void device_cleanup(struct device *dev);
256 struct device *device_find(const char *name);
257 struct device *device_get(const char *name, int create);
258 void device_add_user(struct device_user *dep, struct device *dev);
259 void device_remove_user(struct device_user *dep);
260 void device_broadcast_event(struct device *dev, enum device_event ev);
261 
262 void device_set_present(struct device *dev, bool state);
263 void device_set_link(struct device *dev, bool state);
264 void device_set_ifindex(struct device *dev, int ifindex);
265 int device_set_ifname(struct device *dev, const char *name);
266 void device_refresh_present(struct device *dev);
267 int device_claim(struct device_user *dep);
268 void device_release(struct device_user *dep);
269 int device_check_state(struct device *dev);
270 void device_dump_status(struct blob_buf *b, struct device *dev);
271 
272 void device_free_unused(struct device *dev);
273 
274 struct device *get_vlan_device_chain(const char *ifname, bool create);
275 void alias_notify_device(const char *name, struct device *dev);
276 struct device *device_alias_get(const char *name);
277 
278 static inline void
279 device_set_deferred(struct device *dev, bool value)
280 {
281         dev->deferred = value;
282         device_refresh_present(dev);
283 }
284 
285 static inline void
286 device_set_disabled(struct device *dev, bool value)
287 {
288         dev->disabled = value;
289         device_refresh_present(dev);
290 }
291 
292 #endif
293 

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