/* * Copyright (c) 2007-2013 Nicira, Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of version 2 of the GNU General Public * License 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301, USA */ #ifndef FLOW_H#define FLOW_H 1 #include <linux/kernel.h>#include <linux/netlink.h>#include <linux/openvswitch.h>#include <linux/spinlock.h>#include <linux/types.h>#include <linux/rcupdate.h>#include <linux/if_ether.h>#include <linux/in6.h>#include <linux/jiffies.h>#include <linux/time.h>#include <linux/flex_array.h>#include <net/inet_ecn.h> struct sk_buff; /* Used to memset ovs_key_ipv4_tunnel padding. */#define OVS_TUNNEL_KEY_SIZE					\	(offsetof(struct ovs_key_ipv4_tunnel, ipv4_ttl) +	\	FIELD_SIZEOF(struct ovs_key_ipv4_tunnel, ipv4_ttl)) struct ovs_key_ipv4_tunnel {	__be64 tun_id;	__be32 ipv4_src;	__be32 ipv4_dst;	__be16 tun_flags;	u8   ipv4_tos;	u8   ipv4_ttl;}; static inline void ovs_flow_tun_key_init(struct ovs_key_ipv4_tunnel *tun_key,					 const struct iphdr *iph, __be64 tun_id,					 __be16 tun_flags){	tun_key->tun_id = tun_id;	tun_key->ipv4_src = iph->saddr;	tun_key->ipv4_dst = iph->daddr;	tun_key->ipv4_tos = iph->tos;	tun_key->ipv4_ttl = iph->ttl;	tun_key->tun_flags = tun_flags; 	/* clear struct padding. */	memset((unsigned char *) tun_key + OVS_TUNNEL_KEY_SIZE, 0,	       sizeof(*tun_key) - OVS_TUNNEL_KEY_SIZE);} struct sw_flow_key {	struct ovs_key_ipv4_tunnel tun_key;  /* Encapsulating tunnel key. */	struct {		u32	priority;	/* Packet QoS priority. */		u32	skb_mark;	/* SKB mark. */		u16	in_port;	/* Input switch port (or DP_MAX_PORTS). */	} phy;	struct {		u8     src[ETH_ALEN];	/* Ethernet source address. */		u8     dst[ETH_ALEN];	/* Ethernet destination address. */		__be16 tci;		/* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */		__be16 type;		/* Ethernet frame type. */	} eth;	struct {		u8     proto;		/* IP protocol or lower 8 bits of ARP opcode. */		u8     tos;		/* IP ToS. */		u8     ttl;		/* IP TTL/hop limit. */		u8     frag;		/* One of OVS_FRAG_TYPE_*. */	} ip;	union {		struct {			struct {				__be32 src;	/* IP source address. */				__be32 dst;	/* IP destination address. */			} addr;			union {				struct {					__be16 src;		/* TCP/UDP/SCTP source port. */					__be16 dst;		/* TCP/UDP/SCTP destination port. */					__be16 flags;		/* TCP flags. */				} tp;				struct {					u8 sha[ETH_ALEN];	/* ARP source hardware address. */					u8 tha[ETH_ALEN];	/* ARP target hardware address. */				} arp;			};		} ipv4;		struct {			struct {				struct in6_addr src;	/* IPv6 source address. */				struct in6_addr dst;	/* IPv6 destination address. */			} addr;			__be32 label;			/* IPv6 flow label. */			struct {				__be16 src;		/* TCP/UDP/SCTP source port. */				__be16 dst;		/* TCP/UDP/SCTP destination port. */				__be16 flags;		/* TCP flags. */			} tp;			struct {				struct in6_addr target;	/* ND target address. */				u8 sll[ETH_ALEN];	/* ND source link layer address. */				u8 tll[ETH_ALEN];	/* ND target link layer address. */			} nd;		} ipv6;	};} __aligned(BITS_PER_LONG/8); /* Ensure that we can do comparisons as longs. */ struct sw_flow_key_range {	size_t start;	size_t end;}; struct sw_flow_mask {	int ref_count;	struct rcu_head rcu;	struct list_head list;	struct sw_flow_key_range range;	struct sw_flow_key key;}; struct sw_flow_match {	struct sw_flow_key *key;	struct sw_flow_key_range range;	struct sw_flow_mask *mask;}; struct sw_flow_actions {	struct rcu_head rcu;	u32 actions_len;	struct nlattr actions[];}; struct sw_flow {	struct rcu_head rcu;	struct hlist_node hash_node[2];	u32 hash; 	struct sw_flow_key key;	struct sw_flow_key unmasked_key;	struct sw_flow_mask *mask;	struct sw_flow_actions __rcu *sf_acts; 	spinlock_t lock;	/* Lock for values below. */	unsigned long used;	/* Last used time (in jiffies). */	u64 packet_count;	/* Number of packets matched. */	u64 byte_count;		/* Number of bytes matched. */	__be16 tcp_flags;	/* Union of seen TCP flags. */}; struct arp_eth_header {	__be16      ar_hrd;	/* format of hardware address   */	__be16      ar_pro;	/* format of protocol address   */	unsigned char   ar_hln;	/* length of hardware address   */	unsigned char   ar_pln;	/* length of protocol address   */	__be16      ar_op;	/* ARP opcode (command)     */ 	/* Ethernet+IPv4 specific members. */	unsigned char       ar_sha[ETH_ALEN];	/* sender hardware address  */	unsigned char       ar_sip[4];		/* sender IP address        */	unsigned char       ar_tha[ETH_ALEN];	/* target hardware address  */	unsigned char       ar_tip[4];		/* target IP address        */} __packed; void ovs_flow_used(struct sw_flow *, struct sk_buff *);u64 ovs_flow_used_time(unsigned long flow_jiffies); int ovs_flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *); #endif /* flow.h */