/*
- * Copyright (c) 2009, 2010, 2011 Nicira Networks.
- * Distributed under the terms of the GNU GPL version 2.
+ * Copyright (c) 2007-2013 Nicira, Inc.
*
- * Significant portions of this file may be copied from parts of the Linux
- * kernel, by Linus Torvalds and others.
+ * 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 "openvswitch/datapath-protocol.h"
-#include "table.h"
+#include <net/inet_ecn.h>
+#include <net/ip_tunnels.h>
struct sk_buff;
-struct sw_flow_actions {
- struct rcu_head rcu;
- u32 actions_len;
- struct nlattr actions[];
+/* 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 {
- __be64 tun_id; /* Encapsulating tunnel ID. */
+ 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 {
- __be32 ipv4_src; /* IPv4 source address. */
- __be32 ipv4_dst; /* IPv4 destination address. */
- };
+ 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 {
- __be32 ipv6_src[4]; /* IPv6 source address. */
- __be32 ipv6_dst[4]; /* IPv6 source address. */
- };
+ 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;
};
- __be32 nd_target[4]; /* IPv6 ND target address. */
- u16 in_port; /* Input switch port. */
- __be16 dl_tci; /* 0 if no VLAN, VLAN_TAG_PRESENT set otherwise. */
- __be16 dl_type; /* Ethernet frame type. */
- __be16 tp_src; /* TCP/UDP source port. */
- __be16 tp_dst; /* TCP/UDP destination port. */
- u8 dl_src[ETH_ALEN]; /* Ethernet source address. */
- u8 dl_dst[ETH_ALEN]; /* Ethernet destination address. */
- u8 nw_proto; /* IP protocol or lower 8 bits of ARP opcode. */
- u8 nw_tos; /* IP ToS (DSCP field, 6 bits). */
- u8 arp_sha[ETH_ALEN]; /* ARP/ND source hardware address. */
- u8 arp_tha[ETH_ALEN]; /* ARP/ND target hardware address. */
+} __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 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. */
+} ____cacheline_aligned_in_smp;
+
struct sw_flow {
struct rcu_head rcu;
- struct tbl_node tbl_node;
+ 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;
-
- atomic_t refcnt;
- bool dead;
-
- 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 sw_flow_stats stats[];
};
-struct arp_eth_header
-{
+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_tip[4]; /* target IP address */
} __packed;
-int flow_init(void);
-void flow_exit(void);
-
-struct sw_flow *flow_alloc(void);
-void flow_deferred_free(struct sw_flow *);
-void flow_free_tbl(struct tbl_node *);
+void ovs_flow_stats_update(struct sw_flow *flow, struct sk_buff *skb);
+void ovs_flow_stats_get(struct sw_flow *flow, struct sw_flow_stats *res);
+void ovs_flow_stats_clear(struct sw_flow *flow);
+u64 ovs_flow_used_time(unsigned long flow_jiffies);
-struct sw_flow_actions *flow_actions_alloc(const struct nlattr *);
-void flow_deferred_free_acts(struct sw_flow_actions *);
-
-void flow_hold(struct sw_flow *);
-void flow_put(struct sw_flow *);
-
-int flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *, bool *is_frag);
-void flow_used(struct sw_flow *, struct sk_buff *);
-u64 flow_used_time(unsigned long flow_jiffies);
-
-u32 flow_hash(const struct sw_flow_key *);
-int flow_cmp(const struct tbl_node *, void *target);
-
-/* By my calculations currently the longest valid nlattr-formatted flow key is
- * 132 bytes long.
- */
-#define FLOW_BUFSIZE 132
-
-int flow_to_nlattrs(const struct sw_flow_key *, struct sk_buff *);
-int flow_from_nlattrs(struct sw_flow_key *swkey, const struct nlattr *);
-
-static inline struct sw_flow *flow_cast(const struct tbl_node *node)
-{
- return container_of(node, struct sw_flow, tbl_node);
-}
+int ovs_flow_extract(struct sk_buff *, u16 in_port, struct sw_flow_key *);
#endif /* flow.h */