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_RPS,
  44         DEV_ATTR_XPS,
  45         DEV_ATTR_DADTRANSMITS,
  46         DEV_ATTR_MULTICAST_TO_UNICAST,
  47         DEV_ATTR_MULTICAST_ROUTER,
  48         DEV_ATTR_MULTICAST_FAST_LEAVE,
  49         DEV_ATTR_MULTICAST,
  50         DEV_ATTR_LEARNING,
  51         DEV_ATTR_UNICAST_FLOOD,
  52         DEV_ATTR_NEIGHGCSTALETIME,
  53         DEV_ATTR_SENDREDIRECTS,
  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         DEV_OPT_RPS                     = (1 << 10),
  95         DEV_OPT_XPS                     = (1 << 11),
  96         DEV_OPT_MTU6                    = (1 << 12),
  97         DEV_OPT_DADTRANSMITS            = (1 << 13),
  98         DEV_OPT_MULTICAST_TO_UNICAST    = (1 << 14),
  99         DEV_OPT_MULTICAST_ROUTER        = (1 << 15),
 100         DEV_OPT_MULTICAST               = (1 << 16),
 101         DEV_OPT_LEARNING                = (1 << 17),
 102         DEV_OPT_UNICAST_FLOOD           = (1 << 18),
 103         DEV_OPT_NEIGHGCSTALETIME        = (1 << 19),
 104         DEV_OPT_MULTICAST_FAST_LEAVE    = (1 << 20),
 105         DEV_OPT_SENDREDIRECTS           = (1 << 21),
 106 };
 107
 108 /* events broadcasted to all users of a device */
 109 enum device_event {
 110         DEV_EVENT_ADD,
 111         DEV_EVENT_REMOVE,
 112
 113         DEV_EVENT_UPDATE_IFNAME,
 114         DEV_EVENT_UPDATE_IFINDEX,
 115
 116         DEV_EVENT_SETUP,
 117         DEV_EVENT_TEARDOWN,
 118         DEV_EVENT_UP,
 119         DEV_EVENT_DOWN,
 120
 121         DEV_EVENT_LINK_UP,
 122         DEV_EVENT_LINK_DOWN,
 123
 124         /* Topology changed (i.e. bridge member added) */
 125         DEV_EVENT_TOPO_CHANGE,
 126
 127         __DEV_EVENT_MAX
 128 };
 129
 130 /*
 131  * device dependency with callbacks
 132  */
 133 struct device_user {
 134         struct safe_list list;
 135
 136         bool claimed;
 137         bool hotplug;
 138         bool alias;
 139
 140         uint8_t ev_idx[__DEV_EVENT_MAX];
 141
 142         struct device *dev;
 143         void (*cb)(struct device_user *, enum device_event);
 144 };
 145
 146 struct device_settings {
 147         unsigned int flags;
 148         unsigned int valid_flags;
 149         unsigned int mtu;
 150         unsigned int mtu6;
 151         unsigned int txqueuelen;
 152         uint8_t macaddr[6];
 153         bool ipv6;
 154         bool promisc;
 155         unsigned int rpfilter;
 156         bool acceptlocal;
 157         unsigned int igmpversion;
 158         unsigned int mldversion;
 159         unsigned int neigh4reachabletime;
 160         unsigned int neigh6reachabletime;
 161         unsigned int neigh4gcstaletime;
 162         unsigned int neigh6gcstaletime;
 163         bool rps;
 164         bool xps;
 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 };
 174
 175 /*
 176  * link layer device. typically represents a linux network device.
 177  * can be used to support VLANs as well
 178  */
 179 struct device {
 180         struct device_type *type;
 181
 182         struct avl_node avl;
 183         struct safe_list users;
 184         struct safe_list aliases;
 185
 186         char ifname[IFNAMSIZ + 1];
 187         int ifindex;
 188
 189         struct blob_attr *config;
 190         bool config_pending;
 191         bool sys_present;
 192         /* DEV_EVENT_ADD */
 193         bool present;
 194         /* DEV_EVENT_UP */
 195         int active;
 196         /* DEV_EVENT_LINK_UP */
 197         bool link_active;
 198
 199         bool external;
 200         bool disabled;
 201         bool deferred;
 202         bool hidden;
 203
 204         bool current_config;
 205         bool iface_config;
 206         bool default_config;
 207         bool wireless;
 208         bool wireless_ap;
 209         bool wireless_isolate;
 210
 211         struct interface *config_iface;
 212
 213         /* set interface up or down */
 214         device_state_cb set_state;
 215
 216         const struct device_hotplug_ops *hotplug_ops;
 217
 218         struct device_user parent;
 219
 220         struct device_settings orig_settings;
 221         struct device_settings settings;
 222 };
 223
 224 struct device_hotplug_ops {
 225         int (*prepare)(struct device *dev);
 226         int (*add)(struct device *main, struct device *member);
 227         int (*del)(struct device *main, struct device *member);
 228 };
 229
 230 extern const struct uci_blob_param_list device_attr_list;
 231 extern struct device_type simple_device_type;
 232 extern struct device_type tunnel_device_type;
 233
 234 void device_lock(void);
 235 void device_unlock(void);
 236
 237 int device_type_add(struct device_type *devtype);
 238 struct device_type *device_type_get(const char *tname);
 239 struct device *device_create(const char *name, struct device_type *type,
 240                              struct blob_attr *config);
 241 void device_init_settings(struct device *dev, struct blob_attr **tb);
 242 void device_init_pending(void);
 243
 244 enum dev_change_type
 245 device_apply_config(struct device *dev, struct device_type *type,
 246                     struct blob_attr *config);
 247
 248 void device_reset_config(void);
 249 void device_reset_old(void);
 250 void device_set_default_ps(bool state);
 251
 252 void device_init_virtual(struct device *dev, struct device_type *type, const char *name);
 253 int device_init(struct device *iface, struct device_type *type, const char *ifname);
 254 void device_cleanup(struct device *dev);
 255 struct device *device_find(const char *name);
 256 struct device *device_get(const char *name, int create);
 257 void device_add_user(struct device_user *dep, struct device *iface);
 258 void device_remove_user(struct device_user *dep);
 259 void device_broadcast_event(struct device *dev, enum device_event ev);
 260
 261 void device_set_present(struct device *dev, bool state);
 262 void device_set_link(struct device *dev, bool state);
 263 void device_set_ifindex(struct device *dev, int ifindex);
 264 int device_set_ifname(struct device *dev, const char *name);
 265 void device_refresh_present(struct device *dev);
 266 int device_claim(struct device_user *dep);
 267 void device_release(struct device_user *dep);
 268 int device_check_state(struct device *dev);
 269 void device_dump_status(struct blob_buf *b, struct device *dev);
 270
 271 void device_free(struct device *dev);
 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