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/*
* netifd - network interface daemon
* Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2
* as published by the Free Software Foundation
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef __LL_H
#define __LL_H
#include <libubox/avl.h>
#include <libubox/safe_list.h>
#include <netinet/in.h>
struct device;
struct device_user;
struct device_hotplug_ops;
typedef int (*device_state_cb)(struct device *, bool up);
enum {
DEV_ATTR_TYPE,
DEV_ATTR_IFNAME,
DEV_ATTR_MTU,
DEV_ATTR_MACADDR,
DEV_ATTR_TXQUEUELEN,
DEV_ATTR_ENABLED,
__DEV_ATTR_MAX,
};
enum dev_change_type {
DEV_CONFIG_NO_CHANGE,
DEV_CONFIG_APPLIED,
DEV_CONFIG_RESTART,
DEV_CONFIG_RECREATE,
};
struct device_type {
struct list_head list;
const char *name;
const struct uci_blob_param_list *config_params;
struct device *(*create)(const char *name, struct blob_attr *attr);
void (*config_init)(struct device *);
enum dev_change_type (*reload)(struct device *, struct blob_attr *);
void (*dump_info)(struct device *, struct blob_buf *buf);
void (*dump_stats)(struct device *, struct blob_buf *buf);
int (*check_state)(struct device *);
void (*free)(struct device *);
};
enum {
DEV_OPT_MTU = (1 << 0),
DEV_OPT_MACADDR = (1 << 1),
DEV_OPT_TXQUEUELEN = (1 << 2),
};
/* events broadcasted to all users of a device */
enum device_event {
DEV_EVENT_ADD,
DEV_EVENT_REMOVE,
DEV_EVENT_UPDATE_IFNAME,
DEV_EVENT_UPDATE_IFINDEX,
DEV_EVENT_SETUP,
DEV_EVENT_TEARDOWN,
DEV_EVENT_UP,
DEV_EVENT_DOWN,
DEV_EVENT_LINK_UP,
DEV_EVENT_LINK_DOWN,
__DEV_EVENT_MAX
};
/*
* device dependency with callbacks
*/
struct device_user {
struct safe_list list;
bool claimed;
bool hotplug;
bool alias;
uint8_t ev_idx[__DEV_EVENT_MAX];
struct device *dev;
void (*cb)(struct device_user *, enum device_event);
};
struct device_settings {
unsigned int flags;
unsigned int mtu;
unsigned int txqueuelen;
uint8_t macaddr[6];
};
/*
* link layer device. typically represents a linux network device.
* can be used to support VLANs as well
*/
struct device {
const struct device_type *type;
struct avl_node avl;
struct safe_list users;
struct safe_list aliases;
char ifname[IFNAMSIZ + 1];
int ifindex;
struct blob_attr *config;
bool config_pending;
bool sys_present;
bool present;
int active;
bool link_active;
bool external;
bool disabled;
bool deferred;
bool hidden;
bool current_config;
bool default_config;
/* set interface up or down */
device_state_cb set_state;
const struct device_hotplug_ops *hotplug_ops;
struct device_user parent;
struct device_settings orig_settings;
struct device_settings settings;
};
struct device_hotplug_ops {
int (*prepare)(struct device *dev);
int (*add)(struct device *main, struct device *member);
int (*del)(struct device *main, struct device *member);
};
extern const struct uci_blob_param_list device_attr_list;
extern const struct device_type simple_device_type;
extern const struct device_type bridge_device_type;
extern const struct device_type tunnel_device_type;
extern const struct device_type macvlan_device_type;
void device_lock(void);
void device_unlock(void);
struct device *device_create(const char *name, const struct device_type *type,
struct blob_attr *config);
void device_init_settings(struct device *dev, struct blob_attr **tb);
void device_init_pending(void);
enum dev_change_type
device_set_config(struct device *dev, const struct device_type *type,
struct blob_attr *attr);
void device_reset_config(void);
void device_reset_old(void);
void device_init_virtual(struct device *dev, const struct device_type *type, const char *name);
int device_init(struct device *iface, const struct device_type *type, const char *ifname);
void device_cleanup(struct device *iface);
struct device *device_get(const char *name, int create);
void device_add_user(struct device_user *dep, struct device *iface);
void device_remove_user(struct device_user *dep);
void device_broadcast_event(struct device *dev, enum device_event ev);
void device_set_present(struct device *dev, bool state);
void device_set_link(struct device *dev, bool state);
void device_set_ifindex(struct device *dev, int ifindex);
void device_refresh_present(struct device *dev);
int device_claim(struct device_user *dep);
void device_release(struct device_user *dep);
int device_check_state(struct device *dev);
void device_dump_status(struct blob_buf *b, struct device *dev);
void device_free(struct device *dev);
void device_free_unused(struct device *dev);
struct device *get_vlan_device_chain(const char *ifname, bool create);
void alias_notify_device(const char *name, struct device *dev);
struct device *device_alias_get(const char *name);
static inline void
device_set_deferred(struct device *dev, bool value)
{
dev->deferred = value;
device_refresh_present(dev);
}
static inline void
device_set_disabled(struct device *dev, bool value)
{
dev->disabled = value;
device_refresh_present(dev);
}
#endif
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