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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (c) 2014 Mahesh Bandewar <maheshb@google.com>
*/
#ifndef __IPVLAN_H
#define __IPVLAN_H
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/rculist.h>
#include <linux/notifier.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/if_arp.h>
#include <linux/if_link.h>
#include <linux/if_vlan.h>
#include <linux/ip.h>
#include <linux/inetdevice.h>
#include <linux/netfilter.h>
#include <net/ip.h>
#include <net/ip6_route.h>
#include <net/netns/generic.h>
#include <net/rtnetlink.h>
#include <net/route.h>
#include <net/addrconf.h>
#include <net/l3mdev.h>
#define IPVLAN_DRV "ipvlan"
#define IPV_DRV_VER "0.1"
#define IPVLAN_HASH_SIZE (1 << BITS_PER_BYTE)
#define IPVLAN_HASH_MASK (IPVLAN_HASH_SIZE - 1)
#define IPVLAN_MAC_FILTER_BITS 8
#define IPVLAN_MAC_FILTER_SIZE (1 << IPVLAN_MAC_FILTER_BITS)
#define IPVLAN_MAC_FILTER_MASK (IPVLAN_MAC_FILTER_SIZE - 1)
#define IPVLAN_QBACKLOG_LIMIT 1000
typedef enum {
IPVL_IPV6 = 0,
IPVL_ICMPV6,
IPVL_IPV4,
IPVL_ARP,
} ipvl_hdr_type;
struct ipvl_pcpu_stats {
u64_stats_t rx_pkts;
u64_stats_t rx_bytes;
u64_stats_t rx_mcast;
u64_stats_t tx_pkts;
u64_stats_t tx_bytes;
struct u64_stats_sync syncp;
u32 rx_errs;
u32 tx_drps;
};
struct ipvl_port;
struct ipvl_dev {
struct net_device *dev;
struct list_head pnode;
struct ipvl_port *port;
struct net_device *phy_dev;
struct list_head addrs;
struct ipvl_pcpu_stats __percpu *pcpu_stats;
DECLARE_BITMAP(mac_filters, IPVLAN_MAC_FILTER_SIZE);
netdev_features_t sfeatures;
u32 msg_enable;
spinlock_t addrs_lock;
};
struct ipvl_addr {
struct ipvl_dev *master; /* Back pointer to master */
union {
struct in6_addr ip6; /* IPv6 address on logical interface */
struct in_addr ip4; /* IPv4 address on logical interface */
} ipu;
#define ip6addr ipu.ip6
#define ip4addr ipu.ip4
struct hlist_node hlnode; /* Hash-table linkage */
struct list_head anode; /* logical-interface linkage */
ipvl_hdr_type atype;
struct rcu_head rcu;
};
struct ipvl_port {
struct net_device *dev;
possible_net_t pnet;
struct hlist_head hlhead[IPVLAN_HASH_SIZE];
struct list_head ipvlans;
u16 mode;
u16 flags;
u16 dev_id_start;
struct work_struct wq;
struct sk_buff_head backlog;
int count;
struct ida ida;
netdevice_tracker dev_tracker;
};
struct ipvl_skb_cb {
bool tx_pkt;
};
#define IPVL_SKB_CB(_skb) ((struct ipvl_skb_cb *)&((_skb)->cb[0]))
static inline struct ipvl_port *ipvlan_port_get_rcu(const struct net_device *d)
{
return rcu_dereference(d->rx_handler_data);
}
static inline struct ipvl_port *ipvlan_port_get_rcu_bh(const struct net_device *d)
{
return rcu_dereference_bh(d->rx_handler_data);
}
static inline struct ipvl_port *ipvlan_port_get_rtnl(const struct net_device *d)
{
return rtnl_dereference(d->rx_handler_data);
}
static inline bool ipvlan_is_private(const struct ipvl_port *port)
{
return !!(port->flags & IPVLAN_F_PRIVATE);
}
static inline void ipvlan_mark_private(struct ipvl_port *port)
{
port->flags |= IPVLAN_F_PRIVATE;
}
static inline void ipvlan_clear_private(struct ipvl_port *port)
{
port->flags &= ~IPVLAN_F_PRIVATE;
}
static inline bool ipvlan_is_vepa(const struct ipvl_port *port)
{
return !!(port->flags & IPVLAN_F_VEPA);
}
static inline void ipvlan_mark_vepa(struct ipvl_port *port)
{
port->flags |= IPVLAN_F_VEPA;
}
static inline void ipvlan_clear_vepa(struct ipvl_port *port)
{
port->flags &= ~IPVLAN_F_VEPA;
}
void ipvlan_init_secret(void);
unsigned int ipvlan_mac_hash(const unsigned char *addr);
rx_handler_result_t ipvlan_handle_frame(struct sk_buff **pskb);
void ipvlan_process_multicast(struct work_struct *work);
int ipvlan_queue_xmit(struct sk_buff *skb, struct net_device *dev);
void ipvlan_ht_addr_add(struct ipvl_dev *ipvlan, struct ipvl_addr *addr);
struct ipvl_addr *ipvlan_find_addr(const struct ipvl_dev *ipvlan,
const void *iaddr, bool is_v6);
bool ipvlan_addr_busy(struct ipvl_port *port, void *iaddr, bool is_v6);
void ipvlan_ht_addr_del(struct ipvl_addr *addr);
struct ipvl_addr *ipvlan_addr_lookup(struct ipvl_port *port, void *lyr3h,
int addr_type, bool use_dest);
void *ipvlan_get_L3_hdr(struct ipvl_port *port, struct sk_buff *skb, int *type);
void ipvlan_count_rx(const struct ipvl_dev *ipvlan,
unsigned int len, bool success, bool mcast);
int ipvlan_link_new(struct net *src_net, struct net_device *dev,
struct nlattr *tb[], struct nlattr *data[],
struct netlink_ext_ack *extack);
void ipvlan_link_delete(struct net_device *dev, struct list_head *head);
void ipvlan_link_setup(struct net_device *dev);
int ipvlan_link_register(struct rtnl_link_ops *ops);
#ifdef CONFIG_IPVLAN_L3S
int ipvlan_l3s_register(struct ipvl_port *port);
void ipvlan_l3s_unregister(struct ipvl_port *port);
void ipvlan_migrate_l3s_hook(struct net *oldnet, struct net *newnet);
int ipvlan_l3s_init(void);
void ipvlan_l3s_cleanup(void);
#else
static inline int ipvlan_l3s_register(struct ipvl_port *port)
{
return -ENOTSUPP;
}
static inline void ipvlan_l3s_unregister(struct ipvl_port *port)
{
}
static inline void ipvlan_migrate_l3s_hook(struct net *oldnet,
struct net *newnet)
{
}
static inline int ipvlan_l3s_init(void)
{
return 0;
}
static inline void ipvlan_l3s_cleanup(void)
{
}
#endif /* CONFIG_IPVLAN_L3S */
static inline bool netif_is_ipvlan_port(const struct net_device *dev)
{
return rcu_access_pointer(dev->rx_handler) == ipvlan_handle_frame;
}
#endif /* __IPVLAN_H */
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