forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
284 lines
7.9 KiB
284 lines
7.9 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
|
/* |
|
* Copyright (c) 2007-2017 Nicira, Inc. |
|
*/ |
|
|
|
#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/cpumask.h> |
|
#include <net/inet_ecn.h> |
|
#include <net/ip_tunnels.h> |
|
#include <net/dst_metadata.h> |
|
#include <net/nsh.h> |
|
|
|
struct sk_buff; |
|
|
|
enum sw_flow_mac_proto { |
|
MAC_PROTO_NONE = 0, |
|
MAC_PROTO_ETHERNET, |
|
}; |
|
#define SW_FLOW_KEY_INVALID 0x80 |
|
#define MPLS_LABEL_DEPTH 3 |
|
|
|
/* 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) \ |
|
(sizeof_field(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; |
|
}; |
|
|
|
struct vlan_head { |
|
__be16 tpid; /* Vlan type. Generally 802.1q or 802.1ad.*/ |
|
__be16 tci; /* 0 if no VLAN, VLAN_CFI_MASK set otherwise. */ |
|
}; |
|
|
|
#define OVS_SW_FLOW_KEY_METADATA_SIZE \ |
|
(offsetof(struct sw_flow_key, recirc_id) + \ |
|
sizeof_field(struct sw_flow_key, recirc_id)) |
|
|
|
struct ovs_key_nsh { |
|
struct ovs_nsh_key_base base; |
|
__be32 context[NSH_MD1_CONTEXT_SIZE]; |
|
}; |
|
|
|
struct sw_flow_key { |
|
u8 tun_opts[IP_TUNNEL_OPTS_MAX]; |
|
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'. */ |
|
u8 mac_proto; /* MAC layer protocol (e.g. Ethernet). */ |
|
u8 tun_proto; /* Protocol of encapsulating tunnel. */ |
|
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. */ |
|
struct vlan_head vlan; |
|
struct vlan_head cvlan; |
|
__be16 type; /* Ethernet frame type. */ |
|
} eth; |
|
/* Filling a hole of two bytes. */ |
|
u8 ct_state; |
|
u8 ct_orig_proto; /* CT original direction tuple IP |
|
* protocol. |
|
*/ |
|
union { |
|
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; |
|
}; |
|
u16 ct_zone; /* Conntrack zone. */ |
|
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; |
|
union { |
|
struct { |
|
__be32 src; |
|
__be32 dst; |
|
} ct_orig; /* Conntrack original direction fields. */ |
|
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. */ |
|
union { |
|
struct { |
|
struct in6_addr src; |
|
struct in6_addr dst; |
|
} ct_orig; /* Conntrack original direction fields. */ |
|
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 { |
|
u32 num_labels_mask; /* labels present bitmap of effective length MPLS_LABEL_DEPTH */ |
|
__be32 lse[MPLS_LABEL_DEPTH]; /* label stack entry */ |
|
} mpls; |
|
|
|
struct ovs_key_nsh nsh; /* network service header */ |
|
}; |
|
struct { |
|
/* Connection tracking fields not packed above. */ |
|
struct { |
|
__be16 src; /* CT orig tuple tp src port. */ |
|
__be16 dst; /* CT orig tuple tp dst port. */ |
|
} orig_tp; |
|
u32 mark; |
|
struct ovs_key_ct_labels labels; |
|
} ct; |
|
|
|
} __aligned(BITS_PER_LONG/8); /* Ensure that we can do comparisons as longs. */ |
|
|
|
static inline bool sw_flow_key_is_nd(const struct sw_flow_key *key) |
|
{ |
|
return key->eth.type == htons(ETH_P_IPV6) && |
|
key->ip.proto == NEXTHDR_ICMP && |
|
key->tp.dst == 0 && |
|
(key->tp.src == htons(NDISC_NEIGHBOUR_SOLICITATION) || |
|
key->tp.src == htons(NDISC_NEIGHBOUR_ADVERTISEMENT)); |
|
} |
|
|
|
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 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 sw_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; /* CPU id of the last writer on |
|
* 'stats[0]'. |
|
*/ |
|
struct sw_flow_key key; |
|
struct sw_flow_id id; |
|
struct cpumask cpu_used_mask; |
|
struct sw_flow_mask *mask; |
|
struct sw_flow_actions __rcu *sf_acts; |
|
struct sw_flow_stats __rcu *stats[]; /* One for each CPU. 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 u8 ovs_key_mac_proto(const struct sw_flow_key *key) |
|
{ |
|
return key->mac_proto & ~SW_FLOW_KEY_INVALID; |
|
} |
|
|
|
static inline u16 __ovs_mac_header_len(u8 mac_proto) |
|
{ |
|
return mac_proto == MAC_PROTO_ETHERNET ? ETH_HLEN : 0; |
|
} |
|
|
|
static inline u16 ovs_mac_header_len(const struct sw_flow_key *key) |
|
{ |
|
return __ovs_mac_header_len(ovs_key_mac_proto(key)); |
|
} |
|
|
|
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_update_l3l4(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 */
|
|
|