[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / openvswitch / flow.h

/*
 * Copyright (c) 2007-2011 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;

struct sw_flow_actions {
	struct rcu_head rcu;
	u32 actions_len;
	struct nlattr actions[];
};

struct sw_flow_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 source port. */
					__be16 dst;		/* TCP/UDP destination port. */
				} 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 source port. */
				__be16 dst;		/* TCP/UDP destination port. */
			} 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;
	};
};

struct sw_flow {
	struct rcu_head rcu;
	struct hlist_node hash_node[2];
	u32 hash;

	struct sw_flow_key key;
	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. */
	u8 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;

int ovs_flow_init(void);
void ovs_flow_exit(void);

struct sw_flow *ovs_flow_alloc(void);
void ovs_flow_deferred_free(struct sw_flow *);
void ovs_flow_free(struct sw_flow *flow);

struct sw_flow_actions *ovs_flow_actions_alloc(const struct nlattr *);
void ovs_flow_deferred_free_acts(struct sw_flow_actions *);

int ovs_flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *,
		     int *key_lenp);
void ovs_flow_used(struct sw_flow *, struct sk_buff *);
u64 ovs_flow_used_time(unsigned long flow_jiffies);

int ovs_flow_to_nlattrs(const struct sw_flow_key *, struct sk_buff *);
int ovs_flow_from_nlattrs(struct sw_flow_key *swkey, int *key_lenp,
		      const struct nlattr *);
int ovs_flow_metadata_from_nlattrs(u32 *priority, u32 *mark, u16 *in_port,
			       const struct nlattr *);

#define MAX_ACTIONS_BUFSIZE    (16 * 1024)
#define TBL_MIN_BUCKETS		1024

struct flow_table {
	struct flex_array *buckets;
	unsigned int count, n_buckets;
	struct rcu_head rcu;
	int node_ver;
	u32 hash_seed;
	bool keep_flows;
};

static inline int ovs_flow_tbl_count(struct flow_table *table)
{
	return table->count;
}

static inline int ovs_flow_tbl_need_to_expand(struct flow_table *table)
{
	return (table->count > table->n_buckets);
}

struct sw_flow *ovs_flow_tbl_lookup(struct flow_table *table,
				    struct sw_flow_key *key, int len);
void ovs_flow_tbl_destroy(struct flow_table *table);
void ovs_flow_tbl_deferred_destroy(struct flow_table *table);
struct flow_table *ovs_flow_tbl_alloc(int new_size);
struct flow_table *ovs_flow_tbl_expand(struct flow_table *table);
struct flow_table *ovs_flow_tbl_rehash(struct flow_table *table);
void ovs_flow_tbl_insert(struct flow_table *table, struct sw_flow *flow);
void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow);
u32 ovs_flow_hash(const struct sw_flow_key *key, int key_len);

struct sw_flow *ovs_flow_tbl_next(struct flow_table *table, u32 *bucket, u32 *idx);
extern const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1];

#endif /* flow.h */
Commit	Line	Data
ccb1352e	1	/*
caf2ee14	2	* Copyright (c) 2007-2011 Nicira, Inc.
ccb1352e JG	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of version 2 of the GNU General Public
	6	* License as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful, but
	9	* WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	11	* General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public License
	14	* along with this program; if not, write to the Free Software
	15	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
	16	* 02110-1301, USA
	17	*/
	18
	19	#ifndef FLOW_H
	20	#define FLOW_H 1
	21
	22	#include <linux/kernel.h>
	23	#include <linux/netlink.h>
	24	#include <linux/openvswitch.h>
	25	#include <linux/spinlock.h>
	26	#include <linux/types.h>
	27	#include <linux/rcupdate.h>
	28	#include <linux/if_ether.h>
	29	#include <linux/in6.h>
	30	#include <linux/jiffies.h>
	31	#include <linux/time.h>
	32	#include <linux/flex_array.h>
	33	#include <net/inet_ecn.h>
	34
	35	struct sk_buff;
	36
	37	struct sw_flow_actions {
	38	struct rcu_head rcu;
	39	u32 actions_len;
	40	struct nlattr actions[];
	41	};
	42
	43	struct sw_flow_key {
	44	struct {
	45	u32 priority; /* Packet QoS priority. */
39c7caeb	46	u32 skb_mark; /* SKB mark. */
15eac2a7	47	u16 in_port; /* Input switch port (or DP_MAX_PORTS). */
ccb1352e JG	48	} phy;
	49	struct {
	50	u8 src[ETH_ALEN]; /* Ethernet source address. */
	51	u8 dst[ETH_ALEN]; /* Ethernet destination address. */
	52	__be16 tci; /* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */
	53	__be16 type; /* Ethernet frame type. */
	54	} eth;
	55	struct {
	56	u8 proto; /* IP protocol or lower 8 bits of ARP opcode. */
	57	u8 tos; /* IP ToS. */
	58	u8 ttl; /* IP TTL/hop limit. */
	59	u8 frag; /* One of OVS_FRAG_TYPE_. /
	60	} ip;
	61	union {
	62	struct {
	63	struct {
	64	__be32 src; /* IP source address. */
	65	__be32 dst; /* IP destination address. */
	66	} addr;
	67	union {
	68	struct {
	69	__be16 src; /* TCP/UDP source port. */
	70	__be16 dst; /* TCP/UDP destination port. */
	71	} tp;
	72	struct {
	73	u8 sha[ETH_ALEN]; /* ARP source hardware address. */
	74	u8 tha[ETH_ALEN]; /* ARP target hardware address. */
	75	} arp;
	76	};
	77	} ipv4;
	78	struct {
	79	struct {
	80	struct in6_addr src; /* IPv6 source address. */
	81	struct in6_addr dst; /* IPv6 destination address. */
	82	} addr;
	83	__be32 label; /* IPv6 flow label. */
	84	struct {
	85	__be16 src; /* TCP/UDP source port. */
	86	__be16 dst; /* TCP/UDP destination port. */
	87	} tp;
	88	struct {
	89	struct in6_addr target; /* ND target address. */
	90	u8 sll[ETH_ALEN]; /* ND source link layer address. */
	91	u8 tll[ETH_ALEN]; /* ND target link layer address. */
	92	} nd;
	93	} ipv6;
	94	};
	95	};
	96
	97	struct sw_flow {
	98	struct rcu_head rcu;
	99	struct hlist_node hash_node[2];
	100	u32 hash;
	101
	102	struct sw_flow_key key;
	103	struct sw_flow_actions __rcu *sf_acts;
	104
	105	spinlock_t lock; /* Lock for values below. */
	106	unsigned long used; /* Last used time (in jiffies). */
	107	u64 packet_count; /* Number of packets matched. */
	108	u64 byte_count; /* Number of bytes matched. */
	109	u8 tcp_flags; /* Union of seen TCP flags. */
	110	};
	111
112	struct arp_eth_header {
113	__be16 ar_hrd; /* format of hardware address */
114	__be16 ar_pro; /* format of protocol address */
115	unsigned char ar_hln; /* length of hardware address */
116	unsigned char ar_pln; /* length of protocol address */
117	__be16 ar_op; /* ARP opcode (command) */
118
119	/* Ethernet+IPv4 specific members. */
120	unsigned char ar_sha[ETH_ALEN]; /* sender hardware address */
121	unsigned char ar_sip[4]; /* sender IP address */
122	unsigned char ar_tha[ETH_ALEN]; /* target hardware address */
123	unsigned char ar_tip[4]; /* target IP address */
124	} __packed;
125
126	int ovs_flow_init(void);
127	void ovs_flow_exit(void);
128
129	struct sw_flow *ovs_flow_alloc(void);
130	void ovs_flow_deferred_free(struct sw_flow *);
131	void ovs_flow_free(struct sw_flow *flow);
132
133	struct sw_flow_actions ovs_flow_actions_alloc(const struct nlattr );
134	void ovs_flow_deferred_free_acts(struct sw_flow_actions *);
135
136	int ovs_flow_extract(struct sk_buff , u16 in_port, struct sw_flow_key ,
137	int *key_lenp);
138	void ovs_flow_used(struct sw_flow , struct sk_buff );
139	u64 ovs_flow_used_time(unsigned long flow_jiffies);
140
ccb1352e JG	141	int ovs_flow_to_nlattrs(const struct sw_flow_key , struct sk_buff );
	142	int ovs_flow_from_nlattrs(struct sw_flow_key swkey, int key_lenp,
	143	const struct nlattr *);
39c7caeb	144	int ovs_flow_metadata_from_nlattrs(u32 priority, u32 mark, u16 *in_port,
ccb1352e JG	145	const struct nlattr *);
ccb1352e JG	146
15eac2a7	147	#define MAX_ACTIONS_BUFSIZE (16 * 1024)
ccb1352e JG	148	#define TBL_MIN_BUCKETS 1024
	149
	150	struct flow_table {
	151	struct flex_array *buckets;
	152	unsigned int count, n_buckets;
	153	struct rcu_head rcu;
	154	int node_ver;
	155	u32 hash_seed;
	156	bool keep_flows;
	157	};
	158
	159	static inline int ovs_flow_tbl_count(struct flow_table *table)
	160	{
	161	return table->count;
	162	}
	163
	164	static inline int ovs_flow_tbl_need_to_expand(struct flow_table *table)
	165	{
	166	return (table->count > table->n_buckets);
	167	}
	168
	169	struct sw_flow ovs_flow_tbl_lookup(struct flow_table table,
	170	struct sw_flow_key *key, int len);
	171	void ovs_flow_tbl_destroy(struct flow_table *table);
	172	void ovs_flow_tbl_deferred_destroy(struct flow_table *table);
	173	struct flow_table *ovs_flow_tbl_alloc(int new_size);
	174	struct flow_table ovs_flow_tbl_expand(struct flow_table table);
	175	struct flow_table ovs_flow_tbl_rehash(struct flow_table table);
	176	void ovs_flow_tbl_insert(struct flow_table table, struct sw_flow flow);
	177	void ovs_flow_tbl_remove(struct flow_table table, struct sw_flow flow);
	178	u32 ovs_flow_hash(const struct sw_flow_key *key, int key_len);
	179
	180	struct sw_flow ovs_flow_tbl_next(struct flow_table table, u32 bucket, u32 idx);
	181	extern const int ovs_key_lens[OVS_KEY_ATTR_MAX + 1];
	182
	183	#endif /* flow.h */