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_user;
  23 struct device_hotplug_ops;
  24 struct interface;
  25
  26 typedef int (*device_state_cb)(struct device *, bool up);
  27
  28 enum {
  29         DEV_ATTR_TYPE,
  30         DEV_ATTR_MTU,
  31         DEV_ATTR_MTU6,
  32         DEV_ATTR_MACADDR,
  33         DEV_ATTR_TXQUEUELEN,
  34         DEV_ATTR_ENABLED,
  35         DEV_ATTR_IPV6,
  36         DEV_ATTR_PROMISC,
  37         DEV_ATTR_RPFILTER,
  38         DEV_ATTR_ACCEPTLOCAL,
  39         DEV_ATTR_IGMPVERSION,
  40         DEV_ATTR_MLDVERSION,
  41         DEV_ATTR_NEIGHREACHABLETIME,
  42         DEV_ATTR_RPS,
  43         DEV_ATTR_XPS,
  44         DEV_ATTR_DADTRANSMITS,
  45         DEV_ATTR_MULTICAST_TO_UNICAST,
  46         DEV_ATTR_MULTICAST_ROUTER,
  47         __DEV_ATTR_MAX,
  48 };
  49
  50 enum dev_change_type {
  51         DEV_CONFIG_NO_CHANGE,
  52         DEV_CONFIG_APPLIED,
  53         DEV_CONFIG_RESTART,
  54         DEV_CONFIG_RECREATE,
  55 };
  56
  57 struct device_type {
  58         struct list_head list;
  59         const char *name;
  60
  61         bool keep_link_status;
  62
  63         const struct uci_blob_param_list *config_params;
  64
  65         struct device *(*create)(const char *name, struct blob_attr *attr);
  66         void (*config_init)(struct device *);
  67         enum dev_change_type (*reload)(struct device *, struct blob_attr *);
  68         void (*dump_info)(struct device *, struct blob_buf *buf);
  69         void (*dump_stats)(struct device *, struct blob_buf *buf);
  70         int (*check_state)(struct device *);
  71         void (*free)(struct device *);
  72 };
  73
  74 enum {
  75         DEV_OPT_MTU                     = (1 << 0),
  76         DEV_OPT_MACADDR                 = (1 << 1),
  77         DEV_OPT_TXQUEUELEN              = (1 << 2),
  78         DEV_OPT_IPV6                    = (1 << 3),
  79         DEV_OPT_PROMISC                 = (1 << 4),
  80         DEV_OPT_RPFILTER                = (1 << 5),
  81         DEV_OPT_ACCEPTLOCAL             = (1 << 6),
  82         DEV_OPT_IGMPVERSION             = (1 << 7),
  83         DEV_OPT_MLDVERSION              = (1 << 8),
  84         DEV_OPT_NEIGHREACHABLETIME      = (1 << 9),
  85         DEV_OPT_RPS                     = (1 << 10),
  86         DEV_OPT_XPS                     = (1 << 11),
  87         DEV_OPT_MTU6                    = (1 << 12),
  88         DEV_OPT_DADTRANSMITS            = (1 << 13),
  89         DEV_OPT_MULTICAST_TO_UNICAST    = (1 << 14),
  90         DEV_OPT_MULTICAST_ROUTER        = (1 << 15),
  91 };
  92
  93 /* events broadcasted to all users of a device */
  94 enum device_event {
  95         DEV_EVENT_ADD,
  96         DEV_EVENT_REMOVE,
  97
  98         DEV_EVENT_UPDATE_IFNAME,
  99         DEV_EVENT_UPDATE_IFINDEX,
 100
 101         DEV_EVENT_SETUP,
 102         DEV_EVENT_TEARDOWN,
 103         DEV_EVENT_UP,
 104         DEV_EVENT_DOWN,
 105
 106         DEV_EVENT_LINK_UP,
 107         DEV_EVENT_LINK_DOWN,
 108
 109         /* Topology changed (i.e. bridge member added) */
 110         DEV_EVENT_TOPO_CHANGE,
 111
 112         __DEV_EVENT_MAX
 113 };
 114
 115 /*
 116  * device dependency with callbacks
 117  */
 118 struct device_user {
 119         struct safe_list list;
 120
 121         bool claimed;
 122         bool hotplug;
 123         bool alias;
 124
 125         uint8_t ev_idx[__DEV_EVENT_MAX];
 126
 127         struct device *dev;
 128         void (*cb)(struct device_user *, enum device_event);
 129 };
 130
 131 struct device_settings {
 132         unsigned int flags;
 133         unsigned int mtu;
 134         unsigned int mtu6;
 135         unsigned int txqueuelen;
 136         uint8_t macaddr[6];
 137         bool ipv6;
 138         bool promisc;
 139         unsigned int rpfilter;
 140         bool acceptlocal;
 141         unsigned int igmpversion;
 142         unsigned int mldversion;
 143         unsigned int neigh4reachabletime;
 144         unsigned int neigh6reachabletime;
 145         bool rps;
 146         bool xps;
 147         unsigned int dadtransmits;
 148         bool multicast_to_unicast;
 149         unsigned int multicast_router;
 150 };
 151
 152 /*
 153  * link layer device. typically represents a linux network device.
 154  * can be used to support VLANs as well
 155  */
 156 struct device {
 157         const struct device_type *type;
 158
 159         struct avl_node avl;
 160         struct safe_list users;
 161         struct safe_list aliases;
 162
 163         char ifname[IFNAMSIZ + 1];
 164         int ifindex;
 165
 166         struct blob_attr *config;
 167         bool config_pending;
 168         bool sys_present;
 169         /* DEV_EVENT_ADD */
 170         bool present;
 171         /* DEV_EVENT_UP */
 172         int active;
 173         /* DEV_EVENT_LINK_UP */
 174         bool link_active;
 175
 176         bool external;
 177         bool disabled;
 178         bool deferred;
 179         bool hidden;
 180
 181         bool current_config;
 182         bool iface_config;
 183         bool default_config;
 184         bool wireless;
 185         bool wireless_ap;
 186         bool wireless_isolate;
 187
 188         struct interface *config_iface;
 189
 190         /* set interface up or down */
 191         device_state_cb set_state;
 192
 193         const struct device_hotplug_ops *hotplug_ops;
 194
 195         struct device_user parent;
 196
 197         struct device_settings orig_settings;
 198         struct device_settings settings;
 199 };
 200
 201 struct device_hotplug_ops {
 202         int (*prepare)(struct device *dev);
 203         int (*add)(struct device *main, struct device *member);
 204         int (*del)(struct device *main, struct device *member);
 205 };
 206
 207 extern const struct uci_blob_param_list device_attr_list;
 208 extern const struct device_type simple_device_type;
 209 extern const struct device_type bridge_device_type;
 210 extern const struct device_type tunnel_device_type;
 211 extern const struct device_type macvlan_device_type;
 212 extern const struct device_type vlandev_device_type;
 213
 214 void device_lock(void);
 215 void device_unlock(void);
 216
 217 struct device *device_create(const char *name, const struct device_type *type,
 218                              struct blob_attr *config);
 219 void device_init_settings(struct device *dev, struct blob_attr **tb);
 220 void device_init_pending(void);
 221
 222 enum dev_change_type
 223 device_apply_config(struct device *dev, const struct device_type *type,
 224                     struct blob_attr *config);
 225
 226 void device_reset_config(void);
 227 void device_reset_old(void);
 228 void device_set_default_ps(bool state);
 229
 230 void device_init_virtual(struct device *dev, const struct device_type *type, const char *name);
 231 int device_init(struct device *iface, const struct device_type *type, const char *ifname);
 232 void device_cleanup(struct device *iface);
 233 struct device *device_get(const char *name, int create);
 234 void device_add_user(struct device_user *dep, struct device *iface);
 235 void device_remove_user(struct device_user *dep);
 236 void device_broadcast_event(struct device *dev, enum device_event ev);
 237
 238 void device_set_present(struct device *dev, bool state);
 239 void device_set_link(struct device *dev, bool state);
 240 void device_set_ifindex(struct device *dev, int ifindex);
 241 void device_refresh_present(struct device *dev);
 242 int device_claim(struct device_user *dep);
 243 void device_release(struct device_user *dep);
 244 int device_check_state(struct device *dev);
 245 void device_dump_status(struct blob_buf *b, struct device *dev);
 246
 247 void device_free(struct device *dev);
 248 void device_free_unused(struct device *dev);
 249
 250 struct device *get_vlan_device_chain(const char *ifname, bool create);
 251 void alias_notify_device(const char *name, struct device *dev);
 252 struct device *device_alias_get(const char *name);
 253
 254 static inline void
 255 device_set_deferred(struct device *dev, bool value)
 256 {
 257         dev->deferred = value;
 258         device_refresh_present(dev);
 259 }
 260
 261 static inline void
 262 device_set_disabled(struct device *dev, bool value)
 263 {
 264         dev->disabled = value;
 265         device_refresh_present(dev);
 266 }
 267
 268 #endif