229 lines
6.6 KiB
C
229 lines
6.6 KiB
C
/*
|
|
* Copyright (c) 2007-2014 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/cache.h>
|
|
#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>
|
|
#include <net/ip_tunnels.h>
|
|
#include <net/dst_metadata.h>
|
|
|
|
struct sk_buff;
|
|
|
|
/* Store options at the end of the array if they are less than the
|
|
* maximum size. This allows us to get the benefits of variable length
|
|
* matching for small options.
|
|
*/
|
|
#define TUN_METADATA_OFFSET(opt_len) \
|
|
(FIELD_SIZEOF(struct sw_flow_key, tun_opts) - opt_len)
|
|
#define TUN_METADATA_OPTS(flow_key, opt_len) \
|
|
((void *)((flow_key)->tun_opts + TUN_METADATA_OFFSET(opt_len)))
|
|
|
|
struct ovs_tunnel_info {
|
|
struct metadata_dst *tun_dst;
|
|
};
|
|
|
|
#define OVS_SW_FLOW_KEY_METADATA_SIZE \
|
|
(offsetof(struct sw_flow_key, recirc_id) + \
|
|
FIELD_SIZEOF(struct sw_flow_key, recirc_id))
|
|
|
|
struct sw_flow_key {
|
|
u8 tun_opts[255];
|
|
u8 tun_opts_len;
|
|
struct ip_tunnel_key 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). */
|
|
} __packed phy; /* Safe when right after 'tun_key'. */
|
|
u32 ovs_flow_hash; /* Datapath computed hash value. */
|
|
u32 recirc_id; /* Recirculation ID. */
|
|
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;
|
|
union {
|
|
struct {
|
|
__be32 top_lse; /* top label stack entry */
|
|
} mpls;
|
|
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;
|
|
};
|
|
struct {
|
|
__be16 src; /* TCP/UDP/SCTP source port. */
|
|
__be16 dst; /* TCP/UDP/SCTP destination port. */
|
|
__be16 flags; /* TCP flags. */
|
|
} tp;
|
|
union {
|
|
struct {
|
|
struct {
|
|
__be32 src; /* IP source address. */
|
|
__be32 dst; /* IP destination address. */
|
|
} addr;
|
|
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 {
|
|
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 {
|
|
/* Connection tracking fields. */
|
|
u16 zone;
|
|
u32 mark;
|
|
u8 state;
|
|
struct ovs_key_ct_labels labels;
|
|
} ct;
|
|
|
|
} __aligned(BITS_PER_LONG/8); /* Ensure that we can do comparisons as longs. */
|
|
|
|
struct sw_flow_key_range {
|
|
unsigned short int start;
|
|
unsigned short int 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;
|
|
};
|
|
|
|
#define MAX_UFID_LENGTH 16 /* 128 bits */
|
|
|
|
struct sw_flow_id {
|
|
u32 ufid_len;
|
|
union {
|
|
u32 ufid[MAX_UFID_LENGTH / 4];
|
|
struct sw_flow_key *unmasked_key;
|
|
};
|
|
};
|
|
|
|
struct sw_flow_actions {
|
|
struct rcu_head rcu;
|
|
size_t orig_len; /* From flow_cmd_new netlink actions size */
|
|
u32 actions_len;
|
|
struct nlattr actions[];
|
|
};
|
|
|
|
struct flow_stats {
|
|
u64 packet_count; /* Number of packets matched. */
|
|
u64 byte_count; /* Number of bytes matched. */
|
|
unsigned long used; /* Last used time (in jiffies). */
|
|
spinlock_t lock; /* Lock for atomic stats update. */
|
|
__be16 tcp_flags; /* Union of seen TCP flags. */
|
|
};
|
|
|
|
struct sw_flow {
|
|
struct rcu_head rcu;
|
|
struct {
|
|
struct hlist_node node[2];
|
|
u32 hash;
|
|
} flow_table, ufid_table;
|
|
int stats_last_writer; /* NUMA-node id of the last writer on
|
|
* 'stats[0]'.
|
|
*/
|
|
struct sw_flow_key key;
|
|
struct sw_flow_id id;
|
|
struct sw_flow_mask *mask;
|
|
struct sw_flow_actions __rcu *sf_acts;
|
|
struct flow_stats __rcu *stats[]; /* One for each NUMA node. First one
|
|
* is allocated at flow creation time,
|
|
* the rest are allocated on demand
|
|
* while holding the 'stats[0].lock'.
|
|
*/
|
|
};
|
|
|
|
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;
|
|
|
|
static inline bool ovs_identifier_is_ufid(const struct sw_flow_id *sfid)
|
|
{
|
|
return sfid->ufid_len;
|
|
}
|
|
|
|
static inline bool ovs_identifier_is_key(const struct sw_flow_id *sfid)
|
|
{
|
|
return !ovs_identifier_is_ufid(sfid);
|
|
}
|
|
|
|
void ovs_flow_stats_update(struct sw_flow *, __be16 tcp_flags,
|
|
const struct sk_buff *);
|
|
void ovs_flow_stats_get(const struct sw_flow *, struct ovs_flow_stats *,
|
|
unsigned long *used, __be16 *tcp_flags);
|
|
void ovs_flow_stats_clear(struct sw_flow *);
|
|
u64 ovs_flow_used_time(unsigned long flow_jiffies);
|
|
|
|
int ovs_flow_key_update(struct sk_buff *skb, struct sw_flow_key *key);
|
|
int ovs_flow_key_extract(const struct ip_tunnel_info *tun_info,
|
|
struct sk_buff *skb,
|
|
struct sw_flow_key *key);
|
|
/* Extract key from packet coming from userspace. */
|
|
int ovs_flow_key_extract_userspace(struct net *net, const struct nlattr *attr,
|
|
struct sk_buff *skb,
|
|
struct sw_flow_key *key, bool log);
|
|
|
|
#endif /* flow.h */
|