| /* |
| * 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> |
| |
| 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; |
| } __packed __aligned(4); /* Minimize padding. */ |
| |
| struct ovs_tunnel_info { |
| struct ovs_key_ipv4_tunnel tunnel; |
| struct geneve_opt *options; |
| u8 options_len; |
| }; |
| |
| /* 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 GENEVE_OPTS(flow_key, opt_len) \ |
| ((struct geneve_opt *)((flow_key)->tun_opts + \ |
| FIELD_SIZEOF(struct sw_flow_key, tun_opts) - \ |
| opt_len)) |
| |
| static inline void ovs_flow_tun_info_init(struct ovs_tunnel_info *tun_info, |
| const struct iphdr *iph, |
| __be64 tun_id, __be16 tun_flags, |
| struct geneve_opt *opts, |
| u8 opts_len) |
| { |
| tun_info->tunnel.tun_id = tun_id; |
| tun_info->tunnel.ipv4_src = iph->saddr; |
| tun_info->tunnel.ipv4_dst = iph->daddr; |
| tun_info->tunnel.ipv4_tos = iph->tos; |
| tun_info->tunnel.ipv4_ttl = iph->ttl; |
| tun_info->tunnel.tun_flags = tun_flags; |
| |
| /* clear struct padding. */ |
| memset((unsigned char *)&tun_info->tunnel + OVS_TUNNEL_KEY_SIZE, 0, |
| sizeof(tun_info->tunnel) - OVS_TUNNEL_KEY_SIZE); |
| |
| tun_info->options = opts; |
| tun_info->options_len = opts_len; |
| } |
| |
| struct sw_flow_key { |
| u8 tun_opts[255]; |
| u8 tun_opts_len; |
| 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). */ |
| } __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; |
| 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; |
| }; |
| } __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; |
| }; |
| |
| struct sw_flow_actions { |
| struct rcu_head rcu; |
| 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 hlist_node hash_node[2]; |
| u32 hash; |
| int stats_last_writer; /* NUMA-node id of the last writer on |
| * 'stats[0]'. |
| */ |
| struct sw_flow_key key; |
| struct sw_flow_key unmasked_key; |
| 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; |
| |
| void ovs_flow_stats_update(struct sw_flow *, __be16 tcp_flags, |
| 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(struct ovs_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(const struct nlattr *attr, |
| struct sk_buff *skb, |
| struct sw_flow_key *key); |
| |
| #endif /* flow.h */ |