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b95e5928fc
The commit f2a4d086ed ("openvswitch: Add packet truncation support.")
introduces packet truncation before sending to userspace upcall receiver.
This patch passes up the skb->len before truncation so that the upcall
receiver knows the original packet size. Potentially this will be used
by sFlow, where OVS translates sFlow config header=N to a sample action,
truncating packet to N byte in kernel datapath. Thus, only N bytes instead
of full-packet size is copied from kernel to userspace, saving the
kernel-to-userspace bandwidth.
Signed-off-by: William Tu <u9012063@gmail.com>
Cc: Pravin Shelar <pshelar@nicira.com>
Acked-by: Pravin B Shelar <pshelar@ovn.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
781 lines
30 KiB
C
781 lines
30 KiB
C
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/*
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* Copyright (c) 2007-2013 Nicira, Inc.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA
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*/
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#ifndef _UAPI__LINUX_OPENVSWITCH_H
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#define _UAPI__LINUX_OPENVSWITCH_H 1
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#include <linux/types.h>
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#include <linux/if_ether.h>
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/**
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* struct ovs_header - header for OVS Generic Netlink messages.
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* @dp_ifindex: ifindex of local port for datapath (0 to make a request not
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* specific to a datapath).
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*
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* Attributes following the header are specific to a particular OVS Generic
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* Netlink family, but all of the OVS families use this header.
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*/
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struct ovs_header {
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int dp_ifindex;
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};
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/* Datapaths. */
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#define OVS_DATAPATH_FAMILY "ovs_datapath"
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#define OVS_DATAPATH_MCGROUP "ovs_datapath"
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/* V2:
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* - API users are expected to provide OVS_DP_ATTR_USER_FEATURES
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* when creating the datapath.
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*/
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#define OVS_DATAPATH_VERSION 2
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/* First OVS datapath version to support features */
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#define OVS_DP_VER_FEATURES 2
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enum ovs_datapath_cmd {
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OVS_DP_CMD_UNSPEC,
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OVS_DP_CMD_NEW,
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OVS_DP_CMD_DEL,
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OVS_DP_CMD_GET,
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OVS_DP_CMD_SET
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};
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/**
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* enum ovs_datapath_attr - attributes for %OVS_DP_* commands.
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* @OVS_DP_ATTR_NAME: Name of the network device that serves as the "local
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* port". This is the name of the network device whose dp_ifindex is given in
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* the &struct ovs_header. Always present in notifications. Required in
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* %OVS_DP_NEW requests. May be used as an alternative to specifying
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* dp_ifindex in other requests (with a dp_ifindex of 0).
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* @OVS_DP_ATTR_UPCALL_PID: The Netlink socket in userspace that is initially
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* set on the datapath port (for OVS_ACTION_ATTR_MISS). Only valid on
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* %OVS_DP_CMD_NEW requests. A value of zero indicates that upcalls should
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* not be sent.
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* @OVS_DP_ATTR_STATS: Statistics about packets that have passed through the
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* datapath. Always present in notifications.
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* @OVS_DP_ATTR_MEGAFLOW_STATS: Statistics about mega flow masks usage for the
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* datapath. Always present in notifications.
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*
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* These attributes follow the &struct ovs_header within the Generic Netlink
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* payload for %OVS_DP_* commands.
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*/
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enum ovs_datapath_attr {
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OVS_DP_ATTR_UNSPEC,
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OVS_DP_ATTR_NAME, /* name of dp_ifindex netdev */
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OVS_DP_ATTR_UPCALL_PID, /* Netlink PID to receive upcalls */
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OVS_DP_ATTR_STATS, /* struct ovs_dp_stats */
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OVS_DP_ATTR_MEGAFLOW_STATS, /* struct ovs_dp_megaflow_stats */
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OVS_DP_ATTR_USER_FEATURES, /* OVS_DP_F_* */
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OVS_DP_ATTR_PAD,
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__OVS_DP_ATTR_MAX
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};
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#define OVS_DP_ATTR_MAX (__OVS_DP_ATTR_MAX - 1)
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struct ovs_dp_stats {
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__u64 n_hit; /* Number of flow table matches. */
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__u64 n_missed; /* Number of flow table misses. */
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__u64 n_lost; /* Number of misses not sent to userspace. */
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__u64 n_flows; /* Number of flows present */
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};
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struct ovs_dp_megaflow_stats {
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__u64 n_mask_hit; /* Number of masks used for flow lookups. */
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__u32 n_masks; /* Number of masks for the datapath. */
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__u32 pad0; /* Pad for future expension. */
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__u64 pad1; /* Pad for future expension. */
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__u64 pad2; /* Pad for future expension. */
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};
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struct ovs_vport_stats {
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__u64 rx_packets; /* total packets received */
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__u64 tx_packets; /* total packets transmitted */
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__u64 rx_bytes; /* total bytes received */
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__u64 tx_bytes; /* total bytes transmitted */
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__u64 rx_errors; /* bad packets received */
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__u64 tx_errors; /* packet transmit problems */
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__u64 rx_dropped; /* no space in linux buffers */
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__u64 tx_dropped; /* no space available in linux */
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};
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/* Allow last Netlink attribute to be unaligned */
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#define OVS_DP_F_UNALIGNED (1 << 0)
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/* Allow datapath to associate multiple Netlink PIDs to each vport */
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#define OVS_DP_F_VPORT_PIDS (1 << 1)
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/* Fixed logical ports. */
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#define OVSP_LOCAL ((__u32)0)
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/* Packet transfer. */
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#define OVS_PACKET_FAMILY "ovs_packet"
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#define OVS_PACKET_VERSION 0x1
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enum ovs_packet_cmd {
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OVS_PACKET_CMD_UNSPEC,
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/* Kernel-to-user notifications. */
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OVS_PACKET_CMD_MISS, /* Flow table miss. */
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OVS_PACKET_CMD_ACTION, /* OVS_ACTION_ATTR_USERSPACE action. */
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/* Userspace commands. */
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OVS_PACKET_CMD_EXECUTE /* Apply actions to a packet. */
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};
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/**
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* enum ovs_packet_attr - attributes for %OVS_PACKET_* commands.
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* @OVS_PACKET_ATTR_PACKET: Present for all notifications. Contains the entire
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* packet as received, from the start of the Ethernet header onward. For
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* %OVS_PACKET_CMD_ACTION, %OVS_PACKET_ATTR_PACKET reflects changes made by
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* actions preceding %OVS_ACTION_ATTR_USERSPACE, but %OVS_PACKET_ATTR_KEY is
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* the flow key extracted from the packet as originally received.
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* @OVS_PACKET_ATTR_KEY: Present for all notifications. Contains the flow key
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* extracted from the packet as nested %OVS_KEY_ATTR_* attributes. This allows
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* userspace to adapt its flow setup strategy by comparing its notion of the
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* flow key against the kernel's.
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* @OVS_PACKET_ATTR_ACTIONS: Contains actions for the packet. Used
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* for %OVS_PACKET_CMD_EXECUTE. It has nested %OVS_ACTION_ATTR_* attributes.
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* Also used in upcall when %OVS_ACTION_ATTR_USERSPACE has optional
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* %OVS_USERSPACE_ATTR_ACTIONS attribute.
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* @OVS_PACKET_ATTR_USERDATA: Present for an %OVS_PACKET_CMD_ACTION
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* notification if the %OVS_ACTION_ATTR_USERSPACE action specified an
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* %OVS_USERSPACE_ATTR_USERDATA attribute, with the same length and content
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* specified there.
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* @OVS_PACKET_ATTR_EGRESS_TUN_KEY: Present for an %OVS_PACKET_CMD_ACTION
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* notification if the %OVS_ACTION_ATTR_USERSPACE action specified an
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* %OVS_USERSPACE_ATTR_EGRESS_TUN_PORT attribute, which is sent only if the
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* output port is actually a tunnel port. Contains the output tunnel key
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* extracted from the packet as nested %OVS_TUNNEL_KEY_ATTR_* attributes.
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* @OVS_PACKET_ATTR_MRU: Present for an %OVS_PACKET_CMD_ACTION and
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* @OVS_PACKET_ATTR_LEN: Packet size before truncation.
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* %OVS_PACKET_ATTR_USERSPACE action specify the Maximum received fragment
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* size.
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*
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* These attributes follow the &struct ovs_header within the Generic Netlink
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* payload for %OVS_PACKET_* commands.
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*/
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enum ovs_packet_attr {
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OVS_PACKET_ATTR_UNSPEC,
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OVS_PACKET_ATTR_PACKET, /* Packet data. */
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OVS_PACKET_ATTR_KEY, /* Nested OVS_KEY_ATTR_* attributes. */
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OVS_PACKET_ATTR_ACTIONS, /* Nested OVS_ACTION_ATTR_* attributes. */
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OVS_PACKET_ATTR_USERDATA, /* OVS_ACTION_ATTR_USERSPACE arg. */
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OVS_PACKET_ATTR_EGRESS_TUN_KEY, /* Nested OVS_TUNNEL_KEY_ATTR_*
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attributes. */
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OVS_PACKET_ATTR_UNUSED1,
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OVS_PACKET_ATTR_UNUSED2,
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OVS_PACKET_ATTR_PROBE, /* Packet operation is a feature probe,
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error logging should be suppressed. */
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OVS_PACKET_ATTR_MRU, /* Maximum received IP fragment size. */
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OVS_PACKET_ATTR_LEN, /* Packet size before truncation. */
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__OVS_PACKET_ATTR_MAX
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};
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#define OVS_PACKET_ATTR_MAX (__OVS_PACKET_ATTR_MAX - 1)
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/* Virtual ports. */
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#define OVS_VPORT_FAMILY "ovs_vport"
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#define OVS_VPORT_MCGROUP "ovs_vport"
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#define OVS_VPORT_VERSION 0x1
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enum ovs_vport_cmd {
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OVS_VPORT_CMD_UNSPEC,
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OVS_VPORT_CMD_NEW,
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OVS_VPORT_CMD_DEL,
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OVS_VPORT_CMD_GET,
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OVS_VPORT_CMD_SET
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};
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enum ovs_vport_type {
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OVS_VPORT_TYPE_UNSPEC,
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OVS_VPORT_TYPE_NETDEV, /* network device */
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OVS_VPORT_TYPE_INTERNAL, /* network device implemented by datapath */
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OVS_VPORT_TYPE_GRE, /* GRE tunnel. */
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OVS_VPORT_TYPE_VXLAN, /* VXLAN tunnel. */
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OVS_VPORT_TYPE_GENEVE, /* Geneve tunnel. */
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__OVS_VPORT_TYPE_MAX
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};
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#define OVS_VPORT_TYPE_MAX (__OVS_VPORT_TYPE_MAX - 1)
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/**
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* enum ovs_vport_attr - attributes for %OVS_VPORT_* commands.
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* @OVS_VPORT_ATTR_PORT_NO: 32-bit port number within datapath.
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* @OVS_VPORT_ATTR_TYPE: 32-bit %OVS_VPORT_TYPE_* constant describing the type
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* of vport.
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* @OVS_VPORT_ATTR_NAME: Name of vport. For a vport based on a network device
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* this is the name of the network device. Maximum length %IFNAMSIZ-1 bytes
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* plus a null terminator.
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* @OVS_VPORT_ATTR_OPTIONS: Vport-specific configuration information.
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* @OVS_VPORT_ATTR_UPCALL_PID: The array of Netlink socket pids in userspace
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* among which OVS_PACKET_CMD_MISS upcalls will be distributed for packets
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* received on this port. If this is a single-element array of value 0,
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* upcalls should not be sent.
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* @OVS_VPORT_ATTR_STATS: A &struct ovs_vport_stats giving statistics for
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* packets sent or received through the vport.
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*
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* These attributes follow the &struct ovs_header within the Generic Netlink
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* payload for %OVS_VPORT_* commands.
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*
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* For %OVS_VPORT_CMD_NEW requests, the %OVS_VPORT_ATTR_TYPE and
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* %OVS_VPORT_ATTR_NAME attributes are required. %OVS_VPORT_ATTR_PORT_NO is
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* optional; if not specified a free port number is automatically selected.
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* Whether %OVS_VPORT_ATTR_OPTIONS is required or optional depends on the type
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* of vport.
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*
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* For other requests, if %OVS_VPORT_ATTR_NAME is specified then it is used to
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* look up the vport to operate on; otherwise dp_idx from the &struct
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* ovs_header plus %OVS_VPORT_ATTR_PORT_NO determine the vport.
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*/
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enum ovs_vport_attr {
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OVS_VPORT_ATTR_UNSPEC,
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OVS_VPORT_ATTR_PORT_NO, /* u32 port number within datapath */
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OVS_VPORT_ATTR_TYPE, /* u32 OVS_VPORT_TYPE_* constant. */
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OVS_VPORT_ATTR_NAME, /* string name, up to IFNAMSIZ bytes long */
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OVS_VPORT_ATTR_OPTIONS, /* nested attributes, varies by vport type */
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OVS_VPORT_ATTR_UPCALL_PID, /* array of u32 Netlink socket PIDs for */
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/* receiving upcalls */
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OVS_VPORT_ATTR_STATS, /* struct ovs_vport_stats */
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OVS_VPORT_ATTR_PAD,
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__OVS_VPORT_ATTR_MAX
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};
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#define OVS_VPORT_ATTR_MAX (__OVS_VPORT_ATTR_MAX - 1)
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enum {
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OVS_VXLAN_EXT_UNSPEC,
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OVS_VXLAN_EXT_GBP, /* Flag or __u32 */
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__OVS_VXLAN_EXT_MAX,
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};
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#define OVS_VXLAN_EXT_MAX (__OVS_VXLAN_EXT_MAX - 1)
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/* OVS_VPORT_ATTR_OPTIONS attributes for tunnels.
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*/
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enum {
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OVS_TUNNEL_ATTR_UNSPEC,
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OVS_TUNNEL_ATTR_DST_PORT, /* 16-bit UDP port, used by L4 tunnels. */
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OVS_TUNNEL_ATTR_EXTENSION,
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__OVS_TUNNEL_ATTR_MAX
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};
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#define OVS_TUNNEL_ATTR_MAX (__OVS_TUNNEL_ATTR_MAX - 1)
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/* Flows. */
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#define OVS_FLOW_FAMILY "ovs_flow"
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#define OVS_FLOW_MCGROUP "ovs_flow"
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#define OVS_FLOW_VERSION 0x1
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enum ovs_flow_cmd {
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OVS_FLOW_CMD_UNSPEC,
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OVS_FLOW_CMD_NEW,
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OVS_FLOW_CMD_DEL,
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OVS_FLOW_CMD_GET,
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OVS_FLOW_CMD_SET
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};
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struct ovs_flow_stats {
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__u64 n_packets; /* Number of matched packets. */
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__u64 n_bytes; /* Number of matched bytes. */
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};
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enum ovs_key_attr {
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OVS_KEY_ATTR_UNSPEC,
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OVS_KEY_ATTR_ENCAP, /* Nested set of encapsulated attributes. */
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OVS_KEY_ATTR_PRIORITY, /* u32 skb->priority */
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OVS_KEY_ATTR_IN_PORT, /* u32 OVS dp port number */
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OVS_KEY_ATTR_ETHERNET, /* struct ovs_key_ethernet */
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OVS_KEY_ATTR_VLAN, /* be16 VLAN TCI */
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OVS_KEY_ATTR_ETHERTYPE, /* be16 Ethernet type */
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OVS_KEY_ATTR_IPV4, /* struct ovs_key_ipv4 */
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OVS_KEY_ATTR_IPV6, /* struct ovs_key_ipv6 */
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OVS_KEY_ATTR_TCP, /* struct ovs_key_tcp */
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OVS_KEY_ATTR_UDP, /* struct ovs_key_udp */
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OVS_KEY_ATTR_ICMP, /* struct ovs_key_icmp */
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OVS_KEY_ATTR_ICMPV6, /* struct ovs_key_icmpv6 */
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OVS_KEY_ATTR_ARP, /* struct ovs_key_arp */
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OVS_KEY_ATTR_ND, /* struct ovs_key_nd */
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OVS_KEY_ATTR_SKB_MARK, /* u32 skb mark */
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OVS_KEY_ATTR_TUNNEL, /* Nested set of ovs_tunnel attributes */
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OVS_KEY_ATTR_SCTP, /* struct ovs_key_sctp */
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OVS_KEY_ATTR_TCP_FLAGS, /* be16 TCP flags. */
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OVS_KEY_ATTR_DP_HASH, /* u32 hash value. Value 0 indicates the hash
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is not computed by the datapath. */
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OVS_KEY_ATTR_RECIRC_ID, /* u32 recirc id */
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OVS_KEY_ATTR_MPLS, /* array of struct ovs_key_mpls.
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* The implementation may restrict
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* the accepted length of the array. */
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OVS_KEY_ATTR_CT_STATE, /* u32 bitmask of OVS_CS_F_* */
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OVS_KEY_ATTR_CT_ZONE, /* u16 connection tracking zone. */
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OVS_KEY_ATTR_CT_MARK, /* u32 connection tracking mark */
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OVS_KEY_ATTR_CT_LABELS, /* 16-octet connection tracking label */
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#ifdef __KERNEL__
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OVS_KEY_ATTR_TUNNEL_INFO, /* struct ip_tunnel_info */
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#endif
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__OVS_KEY_ATTR_MAX
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};
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#define OVS_KEY_ATTR_MAX (__OVS_KEY_ATTR_MAX - 1)
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enum ovs_tunnel_key_attr {
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OVS_TUNNEL_KEY_ATTR_ID, /* be64 Tunnel ID */
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OVS_TUNNEL_KEY_ATTR_IPV4_SRC, /* be32 src IP address. */
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OVS_TUNNEL_KEY_ATTR_IPV4_DST, /* be32 dst IP address. */
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OVS_TUNNEL_KEY_ATTR_TOS, /* u8 Tunnel IP ToS. */
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OVS_TUNNEL_KEY_ATTR_TTL, /* u8 Tunnel IP TTL. */
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OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT, /* No argument, set DF. */
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OVS_TUNNEL_KEY_ATTR_CSUM, /* No argument. CSUM packet. */
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OVS_TUNNEL_KEY_ATTR_OAM, /* No argument. OAM frame. */
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OVS_TUNNEL_KEY_ATTR_GENEVE_OPTS, /* Array of Geneve options. */
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OVS_TUNNEL_KEY_ATTR_TP_SRC, /* be16 src Transport Port. */
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OVS_TUNNEL_KEY_ATTR_TP_DST, /* be16 dst Transport Port. */
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OVS_TUNNEL_KEY_ATTR_VXLAN_OPTS, /* Nested OVS_VXLAN_EXT_* */
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OVS_TUNNEL_KEY_ATTR_IPV6_SRC, /* struct in6_addr src IPv6 address. */
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OVS_TUNNEL_KEY_ATTR_IPV6_DST, /* struct in6_addr dst IPv6 address. */
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OVS_TUNNEL_KEY_ATTR_PAD,
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__OVS_TUNNEL_KEY_ATTR_MAX
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};
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#define OVS_TUNNEL_KEY_ATTR_MAX (__OVS_TUNNEL_KEY_ATTR_MAX - 1)
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/**
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* enum ovs_frag_type - IPv4 and IPv6 fragment type
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* @OVS_FRAG_TYPE_NONE: Packet is not a fragment.
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* @OVS_FRAG_TYPE_FIRST: Packet is a fragment with offset 0.
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* @OVS_FRAG_TYPE_LATER: Packet is a fragment with nonzero offset.
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*
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* Used as the @ipv4_frag in &struct ovs_key_ipv4 and as @ipv6_frag &struct
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* ovs_key_ipv6.
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*/
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enum ovs_frag_type {
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OVS_FRAG_TYPE_NONE,
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OVS_FRAG_TYPE_FIRST,
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OVS_FRAG_TYPE_LATER,
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__OVS_FRAG_TYPE_MAX
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};
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#define OVS_FRAG_TYPE_MAX (__OVS_FRAG_TYPE_MAX - 1)
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struct ovs_key_ethernet {
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__u8 eth_src[ETH_ALEN];
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__u8 eth_dst[ETH_ALEN];
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};
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struct ovs_key_mpls {
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__be32 mpls_lse;
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};
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struct ovs_key_ipv4 {
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__be32 ipv4_src;
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__be32 ipv4_dst;
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__u8 ipv4_proto;
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__u8 ipv4_tos;
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__u8 ipv4_ttl;
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|
__u8 ipv4_frag; /* One of OVS_FRAG_TYPE_*. */
|
|
};
|
|
|
|
struct ovs_key_ipv6 {
|
|
__be32 ipv6_src[4];
|
|
__be32 ipv6_dst[4];
|
|
__be32 ipv6_label; /* 20-bits in least-significant bits. */
|
|
__u8 ipv6_proto;
|
|
__u8 ipv6_tclass;
|
|
__u8 ipv6_hlimit;
|
|
__u8 ipv6_frag; /* One of OVS_FRAG_TYPE_*. */
|
|
};
|
|
|
|
struct ovs_key_tcp {
|
|
__be16 tcp_src;
|
|
__be16 tcp_dst;
|
|
};
|
|
|
|
struct ovs_key_udp {
|
|
__be16 udp_src;
|
|
__be16 udp_dst;
|
|
};
|
|
|
|
struct ovs_key_sctp {
|
|
__be16 sctp_src;
|
|
__be16 sctp_dst;
|
|
};
|
|
|
|
struct ovs_key_icmp {
|
|
__u8 icmp_type;
|
|
__u8 icmp_code;
|
|
};
|
|
|
|
struct ovs_key_icmpv6 {
|
|
__u8 icmpv6_type;
|
|
__u8 icmpv6_code;
|
|
};
|
|
|
|
struct ovs_key_arp {
|
|
__be32 arp_sip;
|
|
__be32 arp_tip;
|
|
__be16 arp_op;
|
|
__u8 arp_sha[ETH_ALEN];
|
|
__u8 arp_tha[ETH_ALEN];
|
|
};
|
|
|
|
struct ovs_key_nd {
|
|
__be32 nd_target[4];
|
|
__u8 nd_sll[ETH_ALEN];
|
|
__u8 nd_tll[ETH_ALEN];
|
|
};
|
|
|
|
#define OVS_CT_LABELS_LEN 16
|
|
struct ovs_key_ct_labels {
|
|
__u8 ct_labels[OVS_CT_LABELS_LEN];
|
|
};
|
|
|
|
/* OVS_KEY_ATTR_CT_STATE flags */
|
|
#define OVS_CS_F_NEW 0x01 /* Beginning of a new connection. */
|
|
#define OVS_CS_F_ESTABLISHED 0x02 /* Part of an existing connection. */
|
|
#define OVS_CS_F_RELATED 0x04 /* Related to an established
|
|
* connection. */
|
|
#define OVS_CS_F_REPLY_DIR 0x08 /* Flow is in the reply direction. */
|
|
#define OVS_CS_F_INVALID 0x10 /* Could not track connection. */
|
|
#define OVS_CS_F_TRACKED 0x20 /* Conntrack has occurred. */
|
|
#define OVS_CS_F_SRC_NAT 0x40 /* Packet's source address/port was
|
|
* mangled by NAT.
|
|
*/
|
|
#define OVS_CS_F_DST_NAT 0x80 /* Packet's destination address/port
|
|
* was mangled by NAT.
|
|
*/
|
|
|
|
#define OVS_CS_F_NAT_MASK (OVS_CS_F_SRC_NAT | OVS_CS_F_DST_NAT)
|
|
|
|
/**
|
|
* enum ovs_flow_attr - attributes for %OVS_FLOW_* commands.
|
|
* @OVS_FLOW_ATTR_KEY: Nested %OVS_KEY_ATTR_* attributes specifying the flow
|
|
* key. Always present in notifications. Required for all requests (except
|
|
* dumps).
|
|
* @OVS_FLOW_ATTR_ACTIONS: Nested %OVS_ACTION_ATTR_* attributes specifying
|
|
* the actions to take for packets that match the key. Always present in
|
|
* notifications. Required for %OVS_FLOW_CMD_NEW requests, optional for
|
|
* %OVS_FLOW_CMD_SET requests. An %OVS_FLOW_CMD_SET without
|
|
* %OVS_FLOW_ATTR_ACTIONS will not modify the actions. To clear the actions,
|
|
* an %OVS_FLOW_ATTR_ACTIONS without any nested attributes must be given.
|
|
* @OVS_FLOW_ATTR_STATS: &struct ovs_flow_stats giving statistics for this
|
|
* flow. Present in notifications if the stats would be nonzero. Ignored in
|
|
* requests.
|
|
* @OVS_FLOW_ATTR_TCP_FLAGS: An 8-bit value giving the OR'd value of all of the
|
|
* TCP flags seen on packets in this flow. Only present in notifications for
|
|
* TCP flows, and only if it would be nonzero. Ignored in requests.
|
|
* @OVS_FLOW_ATTR_USED: A 64-bit integer giving the time, in milliseconds on
|
|
* the system monotonic clock, at which a packet was last processed for this
|
|
* flow. Only present in notifications if a packet has been processed for this
|
|
* flow. Ignored in requests.
|
|
* @OVS_FLOW_ATTR_CLEAR: If present in a %OVS_FLOW_CMD_SET request, clears the
|
|
* last-used time, accumulated TCP flags, and statistics for this flow.
|
|
* Otherwise ignored in requests. Never present in notifications.
|
|
* @OVS_FLOW_ATTR_MASK: Nested %OVS_KEY_ATTR_* attributes specifying the
|
|
* mask bits for wildcarded flow match. Mask bit value '1' specifies exact
|
|
* match with corresponding flow key bit, while mask bit value '0' specifies
|
|
* a wildcarded match. Omitting attribute is treated as wildcarding all
|
|
* corresponding fields. Optional for all requests. If not present,
|
|
* all flow key bits are exact match bits.
|
|
* @OVS_FLOW_ATTR_UFID: A value between 1-16 octets specifying a unique
|
|
* identifier for the flow. Causes the flow to be indexed by this value rather
|
|
* than the value of the %OVS_FLOW_ATTR_KEY attribute. Optional for all
|
|
* requests. Present in notifications if the flow was created with this
|
|
* attribute.
|
|
* @OVS_FLOW_ATTR_UFID_FLAGS: A 32-bit value of OR'd %OVS_UFID_F_*
|
|
* flags that provide alternative semantics for flow installation and
|
|
* retrieval. Optional for all requests.
|
|
*
|
|
* These attributes follow the &struct ovs_header within the Generic Netlink
|
|
* payload for %OVS_FLOW_* commands.
|
|
*/
|
|
enum ovs_flow_attr {
|
|
OVS_FLOW_ATTR_UNSPEC,
|
|
OVS_FLOW_ATTR_KEY, /* Sequence of OVS_KEY_ATTR_* attributes. */
|
|
OVS_FLOW_ATTR_ACTIONS, /* Nested OVS_ACTION_ATTR_* attributes. */
|
|
OVS_FLOW_ATTR_STATS, /* struct ovs_flow_stats. */
|
|
OVS_FLOW_ATTR_TCP_FLAGS, /* 8-bit OR'd TCP flags. */
|
|
OVS_FLOW_ATTR_USED, /* u64 msecs last used in monotonic time. */
|
|
OVS_FLOW_ATTR_CLEAR, /* Flag to clear stats, tcp_flags, used. */
|
|
OVS_FLOW_ATTR_MASK, /* Sequence of OVS_KEY_ATTR_* attributes. */
|
|
OVS_FLOW_ATTR_PROBE, /* Flow operation is a feature probe, error
|
|
* logging should be suppressed. */
|
|
OVS_FLOW_ATTR_UFID, /* Variable length unique flow identifier. */
|
|
OVS_FLOW_ATTR_UFID_FLAGS,/* u32 of OVS_UFID_F_*. */
|
|
OVS_FLOW_ATTR_PAD,
|
|
__OVS_FLOW_ATTR_MAX
|
|
};
|
|
|
|
#define OVS_FLOW_ATTR_MAX (__OVS_FLOW_ATTR_MAX - 1)
|
|
|
|
/**
|
|
* Omit attributes for notifications.
|
|
*
|
|
* If a datapath request contains an %OVS_UFID_F_OMIT_* flag, then the datapath
|
|
* may omit the corresponding %OVS_FLOW_ATTR_* from the response.
|
|
*/
|
|
#define OVS_UFID_F_OMIT_KEY (1 << 0)
|
|
#define OVS_UFID_F_OMIT_MASK (1 << 1)
|
|
#define OVS_UFID_F_OMIT_ACTIONS (1 << 2)
|
|
|
|
/**
|
|
* enum ovs_sample_attr - Attributes for %OVS_ACTION_ATTR_SAMPLE action.
|
|
* @OVS_SAMPLE_ATTR_PROBABILITY: 32-bit fraction of packets to sample with
|
|
* @OVS_ACTION_ATTR_SAMPLE. A value of 0 samples no packets, a value of
|
|
* %UINT32_MAX samples all packets and intermediate values sample intermediate
|
|
* fractions of packets.
|
|
* @OVS_SAMPLE_ATTR_ACTIONS: Set of actions to execute in sampling event.
|
|
* Actions are passed as nested attributes.
|
|
*
|
|
* Executes the specified actions with the given probability on a per-packet
|
|
* basis.
|
|
*/
|
|
enum ovs_sample_attr {
|
|
OVS_SAMPLE_ATTR_UNSPEC,
|
|
OVS_SAMPLE_ATTR_PROBABILITY, /* u32 number */
|
|
OVS_SAMPLE_ATTR_ACTIONS, /* Nested OVS_ACTION_ATTR_* attributes. */
|
|
__OVS_SAMPLE_ATTR_MAX,
|
|
};
|
|
|
|
#define OVS_SAMPLE_ATTR_MAX (__OVS_SAMPLE_ATTR_MAX - 1)
|
|
|
|
/**
|
|
* enum ovs_userspace_attr - Attributes for %OVS_ACTION_ATTR_USERSPACE action.
|
|
* @OVS_USERSPACE_ATTR_PID: u32 Netlink PID to which the %OVS_PACKET_CMD_ACTION
|
|
* message should be sent. Required.
|
|
* @OVS_USERSPACE_ATTR_USERDATA: If present, its variable-length argument is
|
|
* copied to the %OVS_PACKET_CMD_ACTION message as %OVS_PACKET_ATTR_USERDATA.
|
|
* @OVS_USERSPACE_ATTR_EGRESS_TUN_PORT: If present, u32 output port to get
|
|
* tunnel info.
|
|
* @OVS_USERSPACE_ATTR_ACTIONS: If present, send actions with upcall.
|
|
*/
|
|
enum ovs_userspace_attr {
|
|
OVS_USERSPACE_ATTR_UNSPEC,
|
|
OVS_USERSPACE_ATTR_PID, /* u32 Netlink PID to receive upcalls. */
|
|
OVS_USERSPACE_ATTR_USERDATA, /* Optional user-specified cookie. */
|
|
OVS_USERSPACE_ATTR_EGRESS_TUN_PORT, /* Optional, u32 output port
|
|
* to get tunnel info. */
|
|
OVS_USERSPACE_ATTR_ACTIONS, /* Optional flag to get actions. */
|
|
__OVS_USERSPACE_ATTR_MAX
|
|
};
|
|
|
|
#define OVS_USERSPACE_ATTR_MAX (__OVS_USERSPACE_ATTR_MAX - 1)
|
|
|
|
struct ovs_action_trunc {
|
|
uint32_t max_len; /* Max packet size in bytes. */
|
|
};
|
|
|
|
/**
|
|
* struct ovs_action_push_mpls - %OVS_ACTION_ATTR_PUSH_MPLS action argument.
|
|
* @mpls_lse: MPLS label stack entry to push.
|
|
* @mpls_ethertype: Ethertype to set in the encapsulating ethernet frame.
|
|
*
|
|
* The only values @mpls_ethertype should ever be given are %ETH_P_MPLS_UC and
|
|
* %ETH_P_MPLS_MC, indicating MPLS unicast or multicast. Other are rejected.
|
|
*/
|
|
struct ovs_action_push_mpls {
|
|
__be32 mpls_lse;
|
|
__be16 mpls_ethertype; /* Either %ETH_P_MPLS_UC or %ETH_P_MPLS_MC */
|
|
};
|
|
|
|
/**
|
|
* struct ovs_action_push_vlan - %OVS_ACTION_ATTR_PUSH_VLAN action argument.
|
|
* @vlan_tpid: Tag protocol identifier (TPID) to push.
|
|
* @vlan_tci: Tag control identifier (TCI) to push. The CFI bit must be set
|
|
* (but it will not be set in the 802.1Q header that is pushed).
|
|
*
|
|
* The @vlan_tpid value is typically %ETH_P_8021Q. The only acceptable TPID
|
|
* values are those that the kernel module also parses as 802.1Q headers, to
|
|
* prevent %OVS_ACTION_ATTR_PUSH_VLAN followed by %OVS_ACTION_ATTR_POP_VLAN
|
|
* from having surprising results.
|
|
*/
|
|
struct ovs_action_push_vlan {
|
|
__be16 vlan_tpid; /* 802.1Q TPID. */
|
|
__be16 vlan_tci; /* 802.1Q TCI (VLAN ID and priority). */
|
|
};
|
|
|
|
/* Data path hash algorithm for computing Datapath hash.
|
|
*
|
|
* The algorithm type only specifies the fields in a flow
|
|
* will be used as part of the hash. Each datapath is free
|
|
* to use its own hash algorithm. The hash value will be
|
|
* opaque to the user space daemon.
|
|
*/
|
|
enum ovs_hash_alg {
|
|
OVS_HASH_ALG_L4,
|
|
};
|
|
|
|
/*
|
|
* struct ovs_action_hash - %OVS_ACTION_ATTR_HASH action argument.
|
|
* @hash_alg: Algorithm used to compute hash prior to recirculation.
|
|
* @hash_basis: basis used for computing hash.
|
|
*/
|
|
struct ovs_action_hash {
|
|
uint32_t hash_alg; /* One of ovs_hash_alg. */
|
|
uint32_t hash_basis;
|
|
};
|
|
|
|
/**
|
|
* enum ovs_ct_attr - Attributes for %OVS_ACTION_ATTR_CT action.
|
|
* @OVS_CT_ATTR_COMMIT: If present, commits the connection to the conntrack
|
|
* table. This allows future packets for the same connection to be identified
|
|
* as 'established' or 'related'. The flow key for the current packet will
|
|
* retain the pre-commit connection state.
|
|
* @OVS_CT_ATTR_ZONE: u16 connection tracking zone.
|
|
* @OVS_CT_ATTR_MARK: u32 value followed by u32 mask. For each bit set in the
|
|
* mask, the corresponding bit in the value is copied to the connection
|
|
* tracking mark field in the connection.
|
|
* @OVS_CT_ATTR_LABELS: %OVS_CT_LABELS_LEN value followed by %OVS_CT_LABELS_LEN
|
|
* mask. For each bit set in the mask, the corresponding bit in the value is
|
|
* copied to the connection tracking label field in the connection.
|
|
* @OVS_CT_ATTR_HELPER: variable length string defining conntrack ALG.
|
|
* @OVS_CT_ATTR_NAT: Nested OVS_NAT_ATTR_* for performing L3 network address
|
|
* translation (NAT) on the packet.
|
|
*/
|
|
enum ovs_ct_attr {
|
|
OVS_CT_ATTR_UNSPEC,
|
|
OVS_CT_ATTR_COMMIT, /* No argument, commits connection. */
|
|
OVS_CT_ATTR_ZONE, /* u16 zone id. */
|
|
OVS_CT_ATTR_MARK, /* mark to associate with this connection. */
|
|
OVS_CT_ATTR_LABELS, /* labels to associate with this connection. */
|
|
OVS_CT_ATTR_HELPER, /* netlink helper to assist detection of
|
|
related connections. */
|
|
OVS_CT_ATTR_NAT, /* Nested OVS_NAT_ATTR_* */
|
|
__OVS_CT_ATTR_MAX
|
|
};
|
|
|
|
#define OVS_CT_ATTR_MAX (__OVS_CT_ATTR_MAX - 1)
|
|
|
|
/**
|
|
* enum ovs_nat_attr - Attributes for %OVS_CT_ATTR_NAT.
|
|
*
|
|
* @OVS_NAT_ATTR_SRC: Flag for Source NAT (mangle source address/port).
|
|
* @OVS_NAT_ATTR_DST: Flag for Destination NAT (mangle destination
|
|
* address/port). Only one of (@OVS_NAT_ATTR_SRC, @OVS_NAT_ATTR_DST) may be
|
|
* specified. Effective only for packets for ct_state NEW connections.
|
|
* Packets of committed connections are mangled by the NAT action according to
|
|
* the committed NAT type regardless of the flags specified. As a corollary, a
|
|
* NAT action without a NAT type flag will only mangle packets of committed
|
|
* connections. The following NAT attributes only apply for NEW
|
|
* (non-committed) connections, and they may be included only when the CT
|
|
* action has the @OVS_CT_ATTR_COMMIT flag and either @OVS_NAT_ATTR_SRC or
|
|
* @OVS_NAT_ATTR_DST is also included.
|
|
* @OVS_NAT_ATTR_IP_MIN: struct in_addr or struct in6_addr
|
|
* @OVS_NAT_ATTR_IP_MAX: struct in_addr or struct in6_addr
|
|
* @OVS_NAT_ATTR_PROTO_MIN: u16 L4 protocol specific lower boundary (port)
|
|
* @OVS_NAT_ATTR_PROTO_MAX: u16 L4 protocol specific upper boundary (port)
|
|
* @OVS_NAT_ATTR_PERSISTENT: Flag for persistent IP mapping across reboots
|
|
* @OVS_NAT_ATTR_PROTO_HASH: Flag for pseudo random L4 port mapping (MD5)
|
|
* @OVS_NAT_ATTR_PROTO_RANDOM: Flag for fully randomized L4 port mapping
|
|
*/
|
|
enum ovs_nat_attr {
|
|
OVS_NAT_ATTR_UNSPEC,
|
|
OVS_NAT_ATTR_SRC,
|
|
OVS_NAT_ATTR_DST,
|
|
OVS_NAT_ATTR_IP_MIN,
|
|
OVS_NAT_ATTR_IP_MAX,
|
|
OVS_NAT_ATTR_PROTO_MIN,
|
|
OVS_NAT_ATTR_PROTO_MAX,
|
|
OVS_NAT_ATTR_PERSISTENT,
|
|
OVS_NAT_ATTR_PROTO_HASH,
|
|
OVS_NAT_ATTR_PROTO_RANDOM,
|
|
__OVS_NAT_ATTR_MAX,
|
|
};
|
|
|
|
#define OVS_NAT_ATTR_MAX (__OVS_NAT_ATTR_MAX - 1)
|
|
|
|
/**
|
|
* enum ovs_action_attr - Action types.
|
|
*
|
|
* @OVS_ACTION_ATTR_OUTPUT: Output packet to port.
|
|
* @OVS_ACTION_ATTR_TRUNC: Output packet to port with truncated packet size.
|
|
* @OVS_ACTION_ATTR_USERSPACE: Send packet to userspace according to nested
|
|
* %OVS_USERSPACE_ATTR_* attributes.
|
|
* @OVS_ACTION_ATTR_SET: Replaces the contents of an existing header. The
|
|
* single nested %OVS_KEY_ATTR_* attribute specifies a header to modify and its
|
|
* value.
|
|
* @OVS_ACTION_ATTR_SET_MASKED: Replaces the contents of an existing header. A
|
|
* nested %OVS_KEY_ATTR_* attribute specifies a header to modify, its value,
|
|
* and a mask. For every bit set in the mask, the corresponding bit value
|
|
* is copied from the value to the packet header field, rest of the bits are
|
|
* left unchanged. The non-masked value bits must be passed in as zeroes.
|
|
* Masking is not supported for the %OVS_KEY_ATTR_TUNNEL attribute.
|
|
* @OVS_ACTION_ATTR_PUSH_VLAN: Push a new outermost 802.1Q header onto the
|
|
* packet.
|
|
* @OVS_ACTION_ATTR_POP_VLAN: Pop the outermost 802.1Q header off the packet.
|
|
* @OVS_ACTION_ATTR_SAMPLE: Probabilitically executes actions, as specified in
|
|
* the nested %OVS_SAMPLE_ATTR_* attributes.
|
|
* @OVS_ACTION_ATTR_PUSH_MPLS: Push a new MPLS label stack entry onto the
|
|
* top of the packets MPLS label stack. Set the ethertype of the
|
|
* encapsulating frame to either %ETH_P_MPLS_UC or %ETH_P_MPLS_MC to
|
|
* indicate the new packet contents.
|
|
* @OVS_ACTION_ATTR_POP_MPLS: Pop an MPLS label stack entry off of the
|
|
* packet's MPLS label stack. Set the encapsulating frame's ethertype to
|
|
* indicate the new packet contents. This could potentially still be
|
|
* %ETH_P_MPLS if the resulting MPLS label stack is not empty. If there
|
|
* is no MPLS label stack, as determined by ethertype, no action is taken.
|
|
* @OVS_ACTION_ATTR_CT: Track the connection. Populate the conntrack-related
|
|
* entries in the flow key.
|
|
*
|
|
* Only a single header can be set with a single %OVS_ACTION_ATTR_SET. Not all
|
|
* fields within a header are modifiable, e.g. the IPv4 protocol and fragment
|
|
* type may not be changed.
|
|
*
|
|
* @OVS_ACTION_ATTR_SET_TO_MASKED: Kernel internal masked set action translated
|
|
* from the @OVS_ACTION_ATTR_SET.
|
|
*/
|
|
|
|
enum ovs_action_attr {
|
|
OVS_ACTION_ATTR_UNSPEC,
|
|
OVS_ACTION_ATTR_OUTPUT, /* u32 port number. */
|
|
OVS_ACTION_ATTR_USERSPACE, /* Nested OVS_USERSPACE_ATTR_*. */
|
|
OVS_ACTION_ATTR_SET, /* One nested OVS_KEY_ATTR_*. */
|
|
OVS_ACTION_ATTR_PUSH_VLAN, /* struct ovs_action_push_vlan. */
|
|
OVS_ACTION_ATTR_POP_VLAN, /* No argument. */
|
|
OVS_ACTION_ATTR_SAMPLE, /* Nested OVS_SAMPLE_ATTR_*. */
|
|
OVS_ACTION_ATTR_RECIRC, /* u32 recirc_id. */
|
|
OVS_ACTION_ATTR_HASH, /* struct ovs_action_hash. */
|
|
OVS_ACTION_ATTR_PUSH_MPLS, /* struct ovs_action_push_mpls. */
|
|
OVS_ACTION_ATTR_POP_MPLS, /* __be16 ethertype. */
|
|
OVS_ACTION_ATTR_SET_MASKED, /* One nested OVS_KEY_ATTR_* including
|
|
* data immediately followed by a mask.
|
|
* The data must be zero for the unmasked
|
|
* bits. */
|
|
OVS_ACTION_ATTR_CT, /* Nested OVS_CT_ATTR_* . */
|
|
OVS_ACTION_ATTR_TRUNC, /* u32 struct ovs_action_trunc. */
|
|
|
|
__OVS_ACTION_ATTR_MAX, /* Nothing past this will be accepted
|
|
* from userspace. */
|
|
|
|
#ifdef __KERNEL__
|
|
OVS_ACTION_ATTR_SET_TO_MASKED, /* Kernel module internal masked
|
|
* set action converted from
|
|
* OVS_ACTION_ATTR_SET. */
|
|
#endif
|
|
};
|
|
|
|
#define OVS_ACTION_ATTR_MAX (__OVS_ACTION_ATTR_MAX - 1)
|
|
|
|
#endif /* _LINUX_OPENVSWITCH_H */
|