X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=datapath%2Fdatapath.h;h=b012a766d2e0f733ba0a6963abb213c278fbd24b;hb=550534413c31d7c91181305962fc7fc982465ac0;hp=3706219e0ad5788e26f33e8b492c3a485e4d4e4c;hpb=34e63086edddcae06d7c1a4fa84fec0861e50758;p=openvswitch diff --git a/datapath/datapath.h b/datapath/datapath.h index 3706219e..b012a766 100644 --- a/datapath/datapath.h +++ b/datapath/datapath.h @@ -1,152 +1,176 @@ /* - * Copyright (c) 2009 Nicira Networks. - * Distributed under the terms of the GNU GPL version 2. + * Copyright (c) 2007-2012 Nicira Networks. * - * 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 */ -/* Interface exported by openvswitch_mod. */ - #ifndef DATAPATH_H #define DATAPATH_H 1 #include #include #include -#include #include -#include #include -#include -#include "flow.h" -#include "brc_sysfs.h" - -struct sk_buff; - -/* Mask for the priority bits in a vlan header. If we ever merge upstream - * then this should go into include/linux/if_vlan.h. */ -#define VLAN_PCP_MASK 0xe000 - -#define DP_MAX_PORTS 256 -#define DP_MAX_GROUPS 16 - -#define DP_L2_BITS (PAGE_SHIFT - ilog2(sizeof(struct sw_flow*))) -#define DP_L2_SIZE (1 << DP_L2_BITS) -#define DP_L2_SHIFT 0 - -#define DP_L1_BITS (PAGE_SHIFT - ilog2(sizeof(struct sw_flow**))) -#define DP_L1_SIZE (1 << DP_L1_BITS) -#define DP_L1_SHIFT DP_L2_BITS - -#define DP_MAX_BUCKETS (DP_L1_SIZE * DP_L2_SIZE) - -struct dp_table { - unsigned int n_buckets; - struct sw_flow ***flows[2]; - struct rcu_head rcu; -}; - -#define DP_N_QUEUES 2 -#define DP_MAX_QUEUE_LEN 100 +#include +#include "checksum.h" +#include "compat.h" +#include "dp_sysfs.h" +#include "flow.h" +#include "tunnel.h" +#include "vlan.h" +#include "vport.h" + +#define DP_MAX_PORTS 1024 +#define SAMPLE_ACTION_DEPTH 3 + +/** + * struct dp_stats_percpu - per-cpu packet processing statistics for a given + * datapath. + * @n_hit: Number of received packets for which a matching flow was found in + * the flow table. + * @n_miss: Number of received packets that had no matching flow in the flow + * table. The sum of @n_hit and @n_miss is the number of packets that have + * been received by the datapath. + * @n_lost: Number of received packets that had no matching flow in the flow + * table that could not be sent to userspace (normally due to an overflow in + * one of the datapath's queues). + */ struct dp_stats_percpu { - u64 n_frags; u64 n_hit; u64 n_missed; u64 n_lost; + struct u64_stats_sync sync; }; -struct dp_port_group { - struct rcu_head rcu; - int n_ports; - u16 ports[]; -}; - +/** + * struct datapath - datapath for flow-based packet switching + * @rcu: RCU callback head for deferred destruction. + * @list_node: Element in global 'dps' list. + * @ifobj: Represents /sys/class/net//brif. Protected by RTNL. + * @n_flows: Number of flows currently in flow table. + * @table: Current flow table. Protected by genl_lock and RCU. + * @ports: Map from port number to &struct vport. %OVSP_LOCAL port + * always exists, other ports may be %NULL. Protected by RTNL and RCU. + * @port_list: List of all ports in @ports in arbitrary order. RTNL required + * to iterate or modify. + * @stats_percpu: Per-CPU datapath statistics. + * @net: Reference to net namespace. + * + * Context: See the comment on locking at the top of datapath.c for additional + * locking information. + */ struct datapath { - struct mutex mutex; - int dp_idx; - -#ifdef CONFIG_SYSFS -#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25) + struct rcu_head rcu; + struct list_head list_node; struct kobject ifobj; -#else - struct kobject *ifobj; -#endif -#endif - - int drop_frags; - - /* Queued data. */ - struct sk_buff_head queues[DP_N_QUEUES]; - wait_queue_head_t waitqueue; /* Flow table. */ - unsigned int n_flows; - struct dp_table *table; - - /* Port groups. */ - struct dp_port_group *groups[DP_MAX_GROUPS]; + struct flow_table __rcu *table; /* Switch ports. */ - unsigned int n_ports; - struct net_bridge_port *ports[DP_MAX_PORTS]; - struct list_head port_list; /* All ports, including local_port. */ + struct vport __rcu *ports[DP_MAX_PORTS]; + struct list_head port_list; /* Stats. */ - struct dp_stats_percpu *stats_percpu; + struct dp_stats_percpu __percpu *stats_percpu; + +#ifdef CONFIG_NET_NS + /* Network namespace ref. */ + struct net *net; +#endif }; -struct net_bridge_port { - u16 port_no; - struct datapath *dp; - struct net_device *dev; -#ifdef CONFIG_SYSFS - struct kobject kobj; +/** + * struct ovs_skb_cb - OVS data in skb CB + * @flow: The flow associated with this packet. May be %NULL if no flow. + * @tun_id: ID of the tunnel that encapsulated this packet. It is 0 if the + * @ip_summed: Consistently stores L4 checksumming status across different + * kernel versions. + * @csum_start: Stores the offset from which to start checksumming independent + * of the transport header on all kernel versions. + * packet was not received on a tunnel. + * @vlan_tci: Provides a substitute for the skb->vlan_tci field on kernels + * before 2.6.27. + */ +struct ovs_skb_cb { + struct sw_flow *flow; + __be64 tun_id; +#ifdef NEED_CSUM_NORMALIZE + enum csum_type ip_summed; + u16 csum_start; +#endif +#ifdef NEED_VLAN_FIELD + u16 vlan_tci; #endif - struct list_head node; /* Element in datapath.ports. */ +}; +#define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb) + +/** + * struct dp_upcall - metadata to include with a packet to send to userspace + * @cmd: One of %OVS_PACKET_CMD_*. + * @key: Becomes %OVS_PACKET_ATTR_KEY. Must be nonnull. + * @userdata: If nonnull, its u64 value is extracted and passed to userspace as + * %OVS_PACKET_ATTR_USERDATA. + * @pid: Netlink PID to which packet should be sent. If @pid is 0 then no + * packet is sent and the packet is accounted in the datapath's @n_lost + * counter. + */ +struct dp_upcall_info { + u8 cmd; + const struct sw_flow_key *key; + const struct nlattr *userdata; + u32 pid; +}; + +/** + * struct ovs_net - Per net-namespace data for ovs. + * @dps: List of datapaths to enable dumping them all out. + * Protected by genl_mutex. + * @vport_net: Per network namespace data for vport. + */ +struct ovs_net { + struct list_head dps; + struct vport_net vport_net; }; -extern struct notifier_block dp_device_notifier; -extern int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd); -extern int (*dp_add_dp_hook)(struct datapath *dp); -extern int (*dp_del_dp_hook)(struct datapath *dp); -extern int (*dp_add_if_hook)(struct net_bridge_port *p); -extern int (*dp_del_if_hook)(struct net_bridge_port *p); - -/* Flow table. */ -struct dp_table *dp_table_create(unsigned int n_buckets); -void dp_table_destroy(struct dp_table *, int free_flows); -struct sw_flow *dp_table_lookup(struct dp_table *, const struct odp_flow_key *); -struct sw_flow **dp_table_lookup_for_insert(struct dp_table *, const struct odp_flow_key *); -int dp_table_delete(struct dp_table *, struct sw_flow *); -int dp_table_expand(struct datapath *); -int dp_table_flush(struct datapath *); -int dp_table_foreach(struct dp_table *table, - int (*callback)(struct sw_flow *flow, void *aux), - void *aux); - -void dp_process_received_packet(struct sk_buff *, struct net_bridge_port *); -int dp_del_port(struct net_bridge_port *, struct list_head *); -int dp_output_port(struct datapath *, struct sk_buff *, int out_port, - int ignore_no_fwd); -int dp_output_control(struct datapath *, struct sk_buff *, int, u32 arg); -void dp_set_origin(struct datapath *, u16, struct sk_buff *); - -struct datapath *get_dp(int dp_idx); - -static inline const char *dp_name(const struct datapath *dp) +extern int ovs_net_id; + +static inline struct net *ovs_dp_get_net(struct datapath *dp) { - return dp->ports[ODPP_LOCAL]->dev->name; + return read_pnet(&dp->net); } -#ifdef CONFIG_XEN -int skb_checksum_setup(struct sk_buff *skb); -#else -static inline int skb_checksum_setup(struct sk_buff *skb) +static inline void ovs_dp_set_net(struct datapath *dp, struct net *net) { - return 0; + write_pnet(&dp->net, net); } -#endif +extern struct notifier_block ovs_dp_device_notifier; +extern struct genl_multicast_group ovs_dp_vport_multicast_group; +extern int (*ovs_dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd); + +void ovs_dp_process_received_packet(struct vport *, struct sk_buff *); +void ovs_dp_detach_port(struct vport *); +int ovs_dp_upcall(struct datapath *, struct sk_buff *, + const struct dp_upcall_info *); + +const char *ovs_dp_name(const struct datapath *dp); +struct sk_buff *ovs_vport_cmd_build_info(struct vport *, u32 pid, u32 seq, + u8 cmd); + +int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb); #endif /* datapath.h */