/*
- * Copyright (c) 2009, 2010, 2011 Nicira Networks.
- * Distributed under the terms of the GNU GPL version 2.
+ * Copyright (c) 2007-2011 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
#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 "openvswitch/datapath-protocol.h"
-#include "table.h"
+#include <linux/flex_array.h>
+#include <net/inet_ecn.h>
struct sk_buff;
struct nlattr actions[];
};
+/* Tunnel flow flags. */
+#define OVS_TNL_F_DONT_FRAGMENT (1 << 0)
+#define OVS_TNL_F_CSUM (1 << 1)
+#define OVS_TNL_F_KEY (1 << 2)
+
+/* 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;
+ u16 tun_flags;
+ u8 ipv4_tos;
+ u8 ipv4_ttl;
+};
+
struct sw_flow_key {
- __be64 tun_id; /* Encapsulating tunnel ID. */
- __be32 nw_src; /* IP source address. */
- __be32 nw_dst; /* IP destination 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 source hardware address. */
- u8 arp_tha[ETH_ALEN]; /* ARP target hardware address. */
+ 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 {
+ 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 tbl_node tbl_node;
+ struct hlist_node hash_node[2];
+ u32 hash;
struct sw_flow_key key;
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. */
u8 tcp_flags; /* Union of seen TCP flags. */
};
-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);
+int ovs_flow_init(void);
+void ovs_flow_exit(void);
-struct sw_flow *flow_alloc(void);
-void flow_deferred_free(struct sw_flow *);
-void flow_free_tbl(struct tbl_node *);
+struct sw_flow *ovs_flow_alloc(void);
+void ovs_flow_deferred_free(struct sw_flow *);
+void ovs_flow_free(struct sw_flow *);
-struct sw_flow_actions *flow_actions_alloc(const struct nlattr *);
-void flow_deferred_free_acts(struct sw_flow_actions *);
+struct sw_flow_actions *ovs_flow_actions_alloc(int actions_len);
+void ovs_flow_deferred_free_acts(struct sw_flow_actions *);
-void flow_hold(struct sw_flow *);
-void flow_put(struct sw_flow *);
+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 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);
+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(struct sw_flow *flow, int key_len,
+ const struct nlattr *attr);
-u32 flow_hash(const struct sw_flow_key *);
-int flow_cmp(const struct tbl_node *, void *target);
+#define MAX_ACTIONS_BUFSIZE (32 * 1024)
+#define TBL_MIN_BUCKETS 1024
-/* By my calculations currently the longest valid nlattr-formatted flow key is
- * 80 bytes long, so this leaves some safety margin.
- */
-#define FLOW_BUFSIZE 96
+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;
+};
-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 int ovs_flow_tbl_count(struct flow_table *table)
+{
+ return table->count;
+}
-static inline struct sw_flow *flow_cast(const struct tbl_node *node)
+static inline int ovs_flow_tbl_need_to_expand(struct flow_table *table)
{
- return container_of(node, struct sw_flow, tbl_node);
+ 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,
+ struct sw_flow_key *key, int key_len);
+void ovs_flow_tbl_remove(struct flow_table *table, struct sw_flow *flow);
+
+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];
+int ipv4_tun_from_nlattr(const struct nlattr *attr,
+ struct ovs_key_ipv4_tunnel *tun_key);
+int ipv4_tun_to_nlattr(struct sk_buff *skb,
+ const struct ovs_key_ipv4_tunnel *tun_key);
+
#endif /* flow.h */
git://git.onelab.eu / sliver-openvswitch.git / blobdiff