mirror of
https://github.com/openvswitch/ovs
synced 2025-08-22 09:58:01 +00:00
29089a540c
Define a new NXAST_SAMPLE OpenFlow vendor action and the corresponding OFPACT_SAMPLE OVS action, to do per-flow packet sampling, translated into a new SAMPLE "flow_sample" dp action. Make the userspace action's userdata size vary depending on the union member used. Add a new "flow_sample" upcall to do per-flow packet sampling. Add a new "ipfix" upcall to do per-bridge packet sampling to IPFIX collectors. Extend the OVSDB schema to support configuring IPFIX collector sets. Add support for configuring multiple IPFIX collectors for per-flow packet sampling. Add support for configuring per-bridge IPFIX sampling. Automatically generate standard IPFIX entity definitions from the IANA specs. Send one IPFIX data record message for every packet sampled by an OpenFlow sample action or received by a bridge configured with IPFIX sampling, and periodically send IPFIX template set messages. Signed-off-by: Romain Lenglet <rlenglet@vmware.com> Signed-off-by: Ben Pfaff <blp@nicira.com>
193 lines
8.2 KiB
C
193 lines
8.2 KiB
C
/*
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* Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ODP_UTIL_H
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#define ODP_UTIL_H 1
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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#include <linux/openvswitch.h>
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#include "hash.h"
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#include "openflow/openflow.h"
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#include "util.h"
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struct ds;
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struct flow;
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struct flow_tnl;
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struct nlattr;
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struct ofpbuf;
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struct simap;
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#define OVSP_NONE UINT32_MAX
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void format_odp_actions(struct ds *, const struct nlattr *odp_actions,
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size_t actions_len);
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int odp_actions_from_string(const char *, const struct simap *port_names,
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struct ofpbuf *odp_actions);
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/* The maximum number of bytes that odp_flow_key_from_flow() appends to a
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* buffer. This is the upper bound on the length of a nlattr-formatted flow
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* key that ovs-vswitchd fully understands.
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*
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* OVS doesn't insist that ovs-vswitchd and the datapath have exactly the same
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* idea of a flow, so therefore this value isn't necessarily an upper bound on
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* the length of a flow key that the datapath can pass to ovs-vswitchd.
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*
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* The longest nlattr-formatted flow key appended by odp_flow_key_from_flow()
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* would be:
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*
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* struct pad nl hdr total
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* ------ --- ------ -----
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* OVS_KEY_ATTR_PRIORITY 4 -- 4 8
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* OVS_KEY_ATTR_TUNNEL 0 -- 4 4
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* - OVS_TUNNEL_KEY_ATTR_ID 8 -- 4 12
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* - OVS_TUNNEL_KEY_ATTR_IPV4_SRC 4 -- 4 8
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* - OVS_TUNNEL_KEY_ATTR_IPV4_DST 4 -- 4 8
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* - OVS_TUNNEL_KEY_ATTR_TOS 1 3 4 8
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* - OVS_TUNNEL_KEY_ATTR_TTL 1 3 4 8
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* - OVS_TUNNEL_KEY_ATTR_DONT_FRAGMENT 0 -- 4 4
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* - OVS_TUNNEL_KEY_ATTR_CSUM 0 -- 4 4
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* OVS_KEY_ATTR_IN_PORT 4 -- 4 8
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* OVS_KEY_ATTR_SKB_MARK 4 -- 4 8
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* OVS_KEY_ATTR_ETHERNET 12 -- 4 16
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* OVS_KEY_ATTR_ETHERTYPE 2 2 4 8 (outer VLAN ethertype)
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* OVS_KEY_ATTR_8021Q 4 -- 4 8
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* OVS_KEY_ATTR_ENCAP 0 -- 4 4 (VLAN encapsulation)
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* OVS_KEY_ATTR_ETHERTYPE 2 2 4 8 (inner VLAN ethertype)
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* OVS_KEY_ATTR_IPV6 40 -- 4 44
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* OVS_KEY_ATTR_ICMPV6 2 2 4 8
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* OVS_KEY_ATTR_ND 28 -- 4 32
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* ----------------------------------------------------------
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* total 208
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*
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* We include some slack space in case the calculation isn't quite right or we
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* add another field and forget to adjust this value.
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*/
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#define ODPUTIL_FLOW_KEY_BYTES 256
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/* A buffer with sufficient size and alignment to hold an nlattr-formatted flow
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* key. An array of "struct nlattr" might not, in theory, be sufficiently
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* aligned because it only contains 16-bit types. */
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struct odputil_keybuf {
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uint32_t keybuf[DIV_ROUND_UP(ODPUTIL_FLOW_KEY_BYTES, 4)];
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};
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void odp_flow_key_format(const struct nlattr *, size_t, struct ds *);
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int odp_flow_key_from_string(const char *s, const struct simap *port_names,
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struct ofpbuf *);
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void odp_flow_key_from_flow(struct ofpbuf *, const struct flow *,
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uint32_t odp_in_port);
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uint32_t odp_flow_key_hash(const struct nlattr *, size_t);
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/* How well a kernel-provided flow key (a sequence of OVS_KEY_ATTR_*
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* attributes) matches OVS userspace expectations.
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*
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* These values are arranged so that greater values are "more important" than
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* lesser ones. In particular, a single flow key can fit the descriptions for
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* both ODP_FIT_TOO_LITTLE and ODP_FIT_TOO_MUCH. Such a key is treated as
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* ODP_FIT_TOO_LITTLE. */
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enum odp_key_fitness {
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ODP_FIT_PERFECT, /* The key had exactly the fields we expect. */
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ODP_FIT_TOO_MUCH, /* The key had fields we don't understand. */
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ODP_FIT_TOO_LITTLE, /* The key lacked fields we expected to see. */
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ODP_FIT_ERROR, /* The key was invalid. */
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};
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enum odp_key_fitness odp_flow_key_to_flow(const struct nlattr *, size_t,
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struct flow *);
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const char *odp_key_fitness_to_string(enum odp_key_fitness);
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void commit_odp_tunnel_action(const struct flow *, struct flow *base,
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struct ofpbuf *odp_actions);
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void commit_odp_actions(const struct flow *, struct flow *base,
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struct ofpbuf *odp_actions);
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/* ofproto-dpif interface.
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*
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* The following types and functions are logically part of ofproto-dpif.
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* ofproto-dpif puts values of these types into the flows that it installs in
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* the kernel datapath, though, so ovs-dpctl needs to interpret them so that
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* it can print flows in a more human-readable manner. */
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enum user_action_cookie_type {
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USER_ACTION_COOKIE_UNSPEC,
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USER_ACTION_COOKIE_SFLOW, /* Packet for per-bridge sFlow sampling. */
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USER_ACTION_COOKIE_SLOW_PATH, /* Userspace must process this flow. */
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USER_ACTION_COOKIE_FLOW_SAMPLE, /* Packet for per-flow sampling. */
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USER_ACTION_COOKIE_IPFIX, /* Packet for per-bridge IPFIX sampling. */
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};
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/* user_action_cookie is passed as argument to OVS_ACTION_ATTR_USERSPACE.
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* Since it is passed to kernel as u64, its size has to be 8 bytes. */
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union user_action_cookie {
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uint16_t type; /* enum user_action_cookie_type. */
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struct {
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uint16_t type; /* USER_ACTION_COOKIE_SFLOW. */
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ovs_be16 vlan_tci; /* Destination VLAN TCI. */
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uint32_t output; /* SFL_FLOW_SAMPLE_TYPE 'output' value. */
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} sflow;
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struct {
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uint16_t type; /* USER_ACTION_COOKIE_SLOW_PATH. */
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uint16_t unused;
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uint32_t reason; /* enum slow_path_reason. */
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} slow_path;
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struct {
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uint16_t type; /* USER_ACTION_COOKIE_FLOW_SAMPLE. */
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uint16_t probability; /* Sampling probability. */
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uint32_t collector_set_id; /* ID of IPFIX collector set. */
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uint32_t obs_domain_id; /* Observation Domain ID. */
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uint32_t obs_point_id; /* Observation Point ID. */
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} flow_sample;
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struct {
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uint16_t type; /* USER_ACTION_COOKIE_IPFIX. */
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} ipfix;
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};
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BUILD_ASSERT_DECL(sizeof(union user_action_cookie) == 16);
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size_t odp_put_userspace_action(uint32_t pid,
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const void *userdata, size_t userdata_size,
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struct ofpbuf *odp_actions);
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void odp_put_tunnel_action(const struct flow_tnl *tunnel,
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struct ofpbuf *odp_actions);
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void odp_put_skb_mark_action(const uint32_t skb_mark,
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struct ofpbuf *odp_actions);
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/* Reasons why a subfacet might not be fast-pathable. */
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enum slow_path_reason {
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/* These reasons are mutually exclusive. */
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SLOW_CFM = 1 << 0, /* CFM packets need per-packet processing. */
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SLOW_LACP = 1 << 1, /* LACP packets need per-packet processing. */
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SLOW_STP = 1 << 2, /* STP packets need per-packet processing. */
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SLOW_IN_BAND = 1 << 3, /* In-band control needs every packet. */
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/* Mutually exclusive with SLOW_CFM, SLOW_LACP, SLOW_STP.
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* Could possibly appear with SLOW_IN_BAND. */
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SLOW_CONTROLLER = 1 << 4, /* Packets must go to OpenFlow controller. */
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/* This can appear on its own, or, theoretically at least, along with any
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* other combination of reasons. */
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SLOW_MATCH = 1 << 5, /* Datapath can't match specifically enough. */
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};
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#endif /* odp-util.h */
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