diff options
Diffstat (limited to 'net/openvswitch/datapath.h')
| -rw-r--r-- | net/openvswitch/datapath.h | 137 |
1 files changed, 111 insertions, 26 deletions
diff --git a/net/openvswitch/datapath.h b/net/openvswitch/datapath.h index c9eb267c6f7e..db0c3e69d66c 100644 --- a/net/openvswitch/datapath.h +++ b/net/openvswitch/datapath.h @@ -1,19 +1,6 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (c) 2007-2014 Nicira, Inc. - * - * 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 DATAPATH_H @@ -26,6 +13,7 @@ #include <linux/skbuff.h> #include <linux/u64_stats_sync.h> #include <net/ip_tunnels.h> +#include <net/mpls.h> #include "conntrack.h" #include "flow.h" @@ -33,16 +21,17 @@ #include "meter.h" #include "vport-internal_dev.h" -#define DP_MAX_PORTS USHRT_MAX -#define DP_VPORT_HASH_BUCKETS 1024 +#define DP_MAX_PORTS USHRT_MAX +#define DP_VPORT_HASH_BUCKETS 1024 +#define DP_MASKS_REBALANCE_INTERVAL 4000 /** * 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 + * @n_missed: Number of received packets that had no matching flow in the flow + * table. The sum of @n_hit and @n_missed 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 @@ -50,16 +39,35 @@ * @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. + * @n_cache_hit: The number of received packets that had their mask found using + * the mask cache. + * @syncp: Synchronization point for 64bit counters. */ struct dp_stats_percpu { u64 n_hit; u64 n_missed; u64 n_lost; u64 n_mask_hit; + u64 n_cache_hit; struct u64_stats_sync syncp; }; /** + * struct dp_nlsk_pids - array of netlink portids of for a datapath. + * This is used when OVS_DP_F_DISPATCH_UPCALL_PER_CPU + * is enabled and must be protected by rcu. + * @rcu: RCU callback head for deferred destruction. + * @n_pids: Size of @pids array. + * @pids: Array storing the Netlink socket PIDs indexed by CPU ID for packets + * that miss the flow table. + */ +struct dp_nlsk_pids { + struct rcu_head rcu; + u32 n_pids; + u32 pids[]; +}; + +/** * struct datapath - datapath for flow-based packet switching * @rcu: RCU callback head for deferred destruction. * @list_node: Element in global 'dps' list. @@ -68,8 +76,11 @@ struct dp_stats_percpu { * ovs_mutex and RCU. * @stats_percpu: Per-CPU datapath statistics. * @net: Reference to net namespace. - * @max_headroom: the maximum headroom of all vports in this datapath; it will + * @user_features: Bitmap of enabled %OVS_DP_F_* features. + * @max_headroom: The maximum headroom of all vports in this datapath; it will * be used by all the internal vports in this dp. + * @meter_tbl: Meter table. + * @upcall_portids: RCU protected 'struct dp_nlsk_pids'. * * Context: See the comment on locking at the top of datapath.c for additional * locking information. @@ -95,7 +106,9 @@ struct datapath { u32 max_headroom; /* Switch meters. */ - struct hlist_head *meters; + struct dp_meter_table meter_tbl; + + struct dp_nlsk_pids __rcu *upcall_portids; }; /** @@ -106,20 +119,29 @@ struct datapath { * fragmented. * @acts_origlen: The netlink size of the flow actions applied to this skb. * @cutlen: The number of bytes from the packet end to be removed. + * @probability: The sampling probability that was applied to this skb; 0 means + * no sampling has occurred; U32_MAX means 100% probability. + * @upcall_pid: Netlink socket PID to use for sending this packet to userspace; + * 0 means "not set" and default per-CPU or per-vport dispatch should be used. */ struct ovs_skb_cb { struct vport *input_vport; u16 mru; u16 acts_origlen; u32 cutlen; + u32 probability; + u32 upcall_pid; }; #define OVS_CB(skb) ((struct ovs_skb_cb *)(skb)->cb) /** - * struct dp_upcall - metadata to include with a packet to send to userspace + * struct dp_upcall_info - metadata to include with a packet sent to userspace * @cmd: One of %OVS_PACKET_CMD_*. * @userdata: If nonnull, its variable-length value is passed to userspace as * %OVS_PACKET_ATTR_USERDATA. + * @actions: If nonnull, its variable-length value is passed to userspace as + * %OVS_PACKET_ATTR_ACTIONS. + * @actions_len: The length of the @actions. * @portid: Netlink portid 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. @@ -140,18 +162,82 @@ struct dp_upcall_info { * struct ovs_net - Per net-namespace data for ovs. * @dps: List of datapaths to enable dumping them all out. * Protected by genl_mutex. + * @dp_notify_work: A work notifier to handle port unregistering. + * @masks_rebalance: A work to periodically optimize flow table caches. + * @ct_limit_info: A hash table of conntrack zone connection limits. + * @xt_label: Whether connlables are configured for the network or not. */ struct ovs_net { struct list_head dps; struct work_struct dp_notify_work; + struct delayed_work masks_rebalance; #if IS_ENABLED(CONFIG_NETFILTER_CONNCOUNT) struct ovs_ct_limit_info *ct_limit_info; #endif - - /* Module reference for configuring conntrack. */ bool xt_label; }; +#define MAX_L2_LEN (VLAN_ETH_HLEN + 3 * MPLS_HLEN) +struct ovs_frag_data { + unsigned long dst; + struct vport *vport; + struct ovs_skb_cb cb; + __be16 inner_protocol; + u16 network_offset; /* valid only for MPLS */ + u16 vlan_tci; + __be16 vlan_proto; + unsigned int l2_len; + u8 mac_proto; + u8 l2_data[MAX_L2_LEN]; +}; + +struct deferred_action { + struct sk_buff *skb; + const struct nlattr *actions; + int actions_len; + + /* Store pkt_key clone when creating deferred action. */ + struct sw_flow_key pkt_key; +}; + +#define DEFERRED_ACTION_FIFO_SIZE 10 +#define OVS_RECURSION_LIMIT 5 +#define OVS_DEFERRED_ACTION_THRESHOLD (OVS_RECURSION_LIMIT - 2) + +struct action_fifo { + int head; + int tail; + /* Deferred action fifo queue storage. */ + struct deferred_action fifo[DEFERRED_ACTION_FIFO_SIZE]; +}; + +struct action_flow_keys { + struct sw_flow_key key[OVS_DEFERRED_ACTION_THRESHOLD]; +}; + +struct ovs_pcpu_storage { + struct action_fifo action_fifos; + struct action_flow_keys flow_keys; + struct ovs_frag_data frag_data; + int exec_level; + struct task_struct *owner; + local_lock_t bh_lock; +}; + +extern struct ovs_pcpu_storage __percpu *ovs_pcpu_storage; + +/** + * enum ovs_pkt_hash_types - hash info to include with a packet + * to send to userspace. + * @OVS_PACKET_HASH_SW_BIT: indicates hash was computed in software stack. + * @OVS_PACKET_HASH_L4_BIT: indicates hash is a canonical 4-tuple hash + * over transport ports. + */ +enum ovs_pkt_hash_types { + OVS_PACKET_HASH_SW_BIT = (1ULL << 32), + OVS_PACKET_HASH_L4_BIT = (1ULL << 33), +}; + extern unsigned int ovs_net_id; void ovs_lock(void); void ovs_unlock(void); @@ -237,6 +323,8 @@ int ovs_dp_upcall(struct datapath *, struct sk_buff *, const struct sw_flow_key *, const struct dp_upcall_info *, uint32_t cutlen); +u32 ovs_dp_get_upcall_portid(const struct datapath *dp, uint32_t cpu_id); + const char *ovs_dp_name(const struct datapath *dp); struct sk_buff *ovs_vport_cmd_build_info(struct vport *vport, struct net *net, u32 portid, u32 seq, u8 cmd); @@ -246,9 +334,6 @@ int ovs_execute_actions(struct datapath *dp, struct sk_buff *skb, void ovs_dp_notify_wq(struct work_struct *work); -int action_fifos_init(void); -void action_fifos_exit(void); - /* 'KEY' must not have any bits set outside of the 'MASK' */ #define OVS_MASKED(OLD, KEY, MASK) ((KEY) | ((OLD) & ~(MASK))) #define OVS_SET_MASKED(OLD, KEY, MASK) ((OLD) = OVS_MASKED(OLD, KEY, MASK)) |