X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=datapath%2Fdatapath.h;h=a847bd992d323dd61f77e9744dddee09c61da0c7;hb=ca93abce9d3c6b7968c52a5458a6c94e7e8191d4;hp=93be155ef39970bb77aa62bf30e02eeb3a9758d8;hpb=f14d80834e73e5e91892e4763e01ccfd3a2d3be2;p=sliver-openvswitch.git diff --git a/datapath/datapath.h b/datapath/datapath.h index 93be155ef..a847bd992 100644 --- a/datapath/datapath.h +++ b/datapath/datapath.h @@ -1,13 +1,21 @@ /* - * Copyright (c) 2009, 2010, 2011 Nicira Networks. - * Distributed under the terms of the GNU GPL version 2. + * Copyright (c) 2007-2014 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 */ -/* Interface exported by openvswitch_mod. */ - #ifndef DATAPATH_H #define DATAPATH_H 1 @@ -15,29 +23,23 @@ #include #include #include -#include #include -#include +#include -#include "checksum.h" #include "compat.h" #include "flow.h" -#include "dp_sysfs.h" +#include "flow_table.h" #include "vlan.h" +#include "vport.h" -struct vport; - -/* 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 VLAN_PCP_SHIFT 13 +#define DP_MAX_PORTS USHRT_MAX +#define DP_VPORT_HASH_BUCKETS 1024 -#define DP_MAX_PORTS 1024 +#define SAMPLE_ACTION_DEPTH 3 /** * struct dp_stats_percpu - per-cpu packet processing statistics for a given * datapath. - * @n_frags: Number of IP fragments processed by 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 @@ -46,82 +48,65 @@ struct vport; * @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). + * @n_mask_hit: Number of masks looked up for flow match. + * @n_mask_hit / (@n_hit + @n_missed) will be the average masks looked + * up per packet. */ struct dp_stats_percpu { - u64 n_frags; u64 n_hit; u64 n_missed; u64 n_lost; - seqcount_t seqlock; + u64 n_mask_hit; + struct u64_stats_sync sync; }; /** * struct datapath - datapath for flow-based packet switching * @rcu: RCU callback head for deferred destruction. - * @dp_ifindex: ifindex of local port. * @list_node: Element in global 'dps' list. - * @ifobj: Represents /sys/class/net//brif. Protected by RTNL. - * @drop_frags: Drop all IP fragments if nonzero. - * @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. + * @table: flow table. + * @ports: Hash table for ports. %OVSP_LOCAL port always exists. Protected by + * ovs_mutex and RCU. * @stats_percpu: Per-CPU datapath statistics. - * @sflow_probability: Number of packets out of UINT_MAX to sample to the - * %OVS_PACKET_CMD_SAMPLE multicast group, e.g. (@sflow_probability/UINT_MAX) - * is the probability of sampling a given packet. + * @net: Reference to net namespace. * * Context: See the comment on locking at the top of datapath.c for additional * locking information. */ struct datapath { struct rcu_head rcu; - int dp_ifindex; struct list_head list_node; - struct kobject ifobj; - - int drop_frags; /* Flow table. */ - struct tbl __rcu *table; + struct flow_table table; /* Switch ports. */ - struct vport __rcu *ports[DP_MAX_PORTS]; - struct list_head port_list; + struct hlist_head *ports; /* Stats. */ struct dp_stats_percpu __percpu *stats_percpu; - /* sFlow Sampling */ - unsigned int sflow_probability; +#ifdef CONFIG_NET_NS + /* Network namespace ref. */ + struct net *net; +#endif + + u32 user_features; }; /** * struct ovs_skb_cb - OVS data in skb CB - * @vport: The datapath port on which the skb entered the switch. * @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. + * @pkt_key: The flow information extracted from the packet. Must be nonnull. + * @tun_key: Key for the tunnel that encapsulated this packet. NULL if the + * @input_vport: The original vport packet came in on. This value is cached + * when a packet is received by OVS. */ struct ovs_skb_cb { - struct vport *vport; 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 sw_flow_key *pkt_key; + struct ovs_key_ipv4_tunnel *tun_key; + struct vport *input_vport; }; #define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb) @@ -129,33 +114,98 @@ struct ovs_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: Becomes %OVS_PACKET_ATTR_USERDATA if nonzero. - * @sample_pool: Becomes %OVS_PACKET_ATTR_SAMPLE_POOL if nonzero. - * @actions: Becomes %OVS_PACKET_ATTR_ACTIONS if nonnull. - * @actions_len: Number of bytes in @actions. -*/ + * @userdata: If nonnull, its variable-length value is passed to userspace as + * %OVS_PACKET_ATTR_USERDATA. + * @portid: Netlink PID to which packet should be sent. If @portid 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; - u64 userdata; - u32 sample_pool; - const struct nlattr *actions; - u32 actions_len; + const struct nlattr *userdata; + u32 portid; +}; + +/** + * 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; + struct work_struct dp_notify_work; }; -extern struct notifier_block dp_device_notifier; -extern struct genl_multicast_group dp_vport_multicast_group; -extern int (*dp_ioctl_hook)(struct net_device *dev, struct ifreq *rq, int cmd); +extern int ovs_net_id; +void ovs_lock(void); +void ovs_unlock(void); -void dp_process_received_packet(struct vport *, struct sk_buff *); -int dp_detach_port(struct vport *); -int dp_upcall(struct datapath *, struct sk_buff *, const struct dp_upcall_info *); -int dp_min_mtu(const struct datapath *dp); -void set_internal_devs_mtu(const struct datapath *dp); +#ifdef CONFIG_LOCKDEP +int lockdep_ovsl_is_held(void); +#else +#define lockdep_ovsl_is_held() 1 +#endif -struct datapath *get_dp(int dp_idx); -const char *dp_name(const struct datapath *dp); -struct sk_buff *ovs_vport_cmd_build_info(struct vport *, u32 pid, u32 seq, +#define ASSERT_OVSL() WARN_ON(unlikely(!lockdep_ovsl_is_held())) +#define ovsl_dereference(p) \ + rcu_dereference_protected(p, lockdep_ovsl_is_held()) +#define rcu_dereference_ovsl(p) \ + rcu_dereference_check(p, lockdep_ovsl_is_held()) + +static inline struct net *ovs_dp_get_net(struct datapath *dp) +{ + return read_pnet(&dp->net); +} + +static inline void ovs_dp_set_net(struct datapath *dp, struct net *net) +{ + write_pnet(&dp->net, net); +} + +struct vport *ovs_lookup_vport(const struct datapath *dp, u16 port_no); + +static inline struct vport *ovs_vport_rcu(const struct datapath *dp, int port_no) +{ + WARN_ON_ONCE(!rcu_read_lock_held()); + return ovs_lookup_vport(dp, port_no); +} + +static inline struct vport *ovs_vport_ovsl_rcu(const struct datapath *dp, int port_no) +{ + WARN_ON_ONCE(!rcu_read_lock_held() && !lockdep_ovsl_is_held()); + return ovs_lookup_vport(dp, port_no); +} + +static inline struct vport *ovs_vport_ovsl(const struct datapath *dp, int port_no) +{ + ASSERT_OVSL(); + return ovs_lookup_vport(dp, port_no); +} + +extern struct notifier_block ovs_dp_device_notifier; +extern struct genl_family dp_vport_genl_family; +extern struct genl_multicast_group ovs_dp_vport_multicast_group; + +void ovs_dp_process_received_packet(struct vport *, struct sk_buff *); +void ovs_dp_process_packet_with_key(struct sk_buff *, + struct sw_flow_key *pkt_key, bool recirc); +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 portid, u32 seq, u8 cmd); +int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb, bool recirc); +void ovs_dp_notify_wq(struct work_struct *work); + +#define OVS_NLERR(fmt, ...) \ +do { \ + if (net_ratelimit()) \ + pr_info("netlink: " fmt, ##__VA_ARGS__); \ +} while (0) #endif /* datapath.h */