X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=datapath%2Fflow.h;h=dab69809563f13ede789a12231e97ce1b77a8542;hb=eb857b4824d2a62e1cc1b85c30a3da007d4942c9;hp=a825366fe844767c3604c00695db48f000e32d46;hpb=34e63086edddcae06d7c1a4fa84fec0861e50758;p=sliver-openvswitch.git diff --git a/datapath/flow.h b/datapath/flow.h index a825366fe..dab698095 100644 --- a/datapath/flow.h +++ b/datapath/flow.h @@ -1,57 +1,232 @@ /* - * Copyright (c) 2009 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 #define FLOW_H 1 #include +#include +#include #include #include #include -#include - -#include "openvswitch/datapath-protocol.h" +#include +#include +#include +#include +#include +#include struct sk_buff; struct sw_flow_actions { struct rcu_head rcu; - unsigned int n_actions; - union odp_action actions[]; + u32 actions_len; + 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) + +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 { + 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 odp_flow_key key; - struct sw_flow_actions *sf_acts; - - struct timespec used; /* Last used time. */ + struct hlist_node hash_node[2]; + u32 hash; - u8 ip_tos; /* IP TOS value. */ + struct sw_flow_key key; + struct sw_flow_actions __rcu *sf_acts; 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. */ }; -extern struct kmem_cache *flow_cache; +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; + +int ovs_flow_init(void); +void ovs_flow_exit(void); + +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 *ovs_flow_actions_alloc(int actions_len); +void ovs_flow_deferred_free_acts(struct sw_flow_actions *); + +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); + +/* Upper bound on the length of a nlattr-formatted flow key. The longest + * nlattr-formatted flow key would be: + * + * struct pad nl hdr total + * ------ --- ------ ----- + * OVS_KEY_ATTR_PRIORITY 4 -- 4 8 + * OVS_KEY_ATTR_TUN_ID 8 -- 4 12 + * OVS_KEY_ATTR_TUNNEL 0 -- 4 4 + * - OVS_TUNNEL_KEY_ATTR_ID 8 -- 4 12 + * - OVS_TUNNEL_KEY_ATTR_IPV4_SRC 4 -- 4 8 + * - OVS_TUNNEL_KEY_ATTR_IPV4_DST 4 -- 4 8 + * - OVS_TUNNEL_KEY_ATTR_TOS 1 3 4 8 + * - OVS_TUNNEL_KEY_ATTR_TTL 1 3 4 8 + * - OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT 0 -- 4 4 + * - OVS_TUNNEL_KEY_ATTR_CSUM 0 -- 4 4 + * OVS_KEY_ATTR_IN_PORT 4 -- 4 8 + * OVS_KEY_ATTR_SKB_MARK 4 -- 4 8 + * OVS_KEY_ATTR_ETHERNET 12 -- 4 16 + * OVS_KEY_ATTR_ETHERTYPE 2 2 4 8 (outer VLAN ethertype) + * OVS_KEY_ATTR_8021Q 4 -- 4 8 + * OVS_KEY_ATTR_ENCAP 0 -- 4 4 (VLAN encapsulation) + * OVS_KEY_ATTR_ETHERTYPE 2 2 4 8 (inner VLAN ethertype) + * OVS_KEY_ATTR_IPV6 40 -- 4 44 + * OVS_KEY_ATTR_ICMPV6 2 2 4 8 + * OVS_KEY_ATTR_ND 28 -- 4 32 + * ---------------------------------------------------------- + * total 220 + */ +#define FLOW_BUFSIZE 220 + +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); + +#define MAX_ACTIONS_BUFSIZE (16 * 1024) +#define TBL_MIN_BUCKETS 1024 + +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; +}; + +static inline int ovs_flow_tbl_count(struct flow_table *table) +{ + return table->count; +} -struct sw_flow_actions *flow_actions_alloc(size_t n_actions); -void flow_free(struct sw_flow *); -void flow_deferred_free(struct sw_flow *); -void flow_deferred_free_acts(struct sw_flow_actions *); -int flow_extract(struct sk_buff *, u16 in_port, struct odp_flow_key *); -void flow_used(struct sw_flow *, struct sk_buff *); +static inline int ovs_flow_tbl_need_to_expand(struct flow_table *table) +{ + return (table->count > table->n_buckets); +} -void print_flow(const struct odp_flow_key *); +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); -int flow_init(void); -void flow_exit(void); +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 */