Skip to content
Permalink
Branch: master
Find file Copy path
Fetching contributors…
Cannot retrieve contributors at this time
249 lines (212 sloc) 10.4 KB
/* Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License. */
#ifndef OFPROTO_DPIF_XLATE_H
#define OFPROTO_DPIF_XLATE_H 1
#include "dp-packet.h"
#include "flow.h"
#include "openvswitch/meta-flow.h"
#include "odp-util.h"
#include "openvswitch/ofpbuf.h"
#include "ofproto-dpif-mirror.h"
#include "ofproto-dpif-rid.h"
#include "ofproto-dpif.h"
#include "ofproto.h"
#include "stp.h"
#include "ovs-lldp.h"
#include "uuid.h"
struct bfd;
struct bond;
struct dpif;
struct lacp;
struct dpif_ipfix;
struct dpif_sflow;
struct mac_learning;
struct mcast_snooping;
struct xlate_cache;
struct xlate_out {
/* Caching exceptions:
*
* - If 'slow' is nonzero, the translation needs to be slow-pathed for
* one reason or another. (The particular value is only important for
* explaining to an administrator why the flow is slow-pathed.) This
* makes OVS install a datapath flow with a send-to-userspace action.
* Only on revalidation will the flow be replaced, if appropriate, by
* one that does something else with the traffic.
*
* - If 'avoid_caching' is true, then OVS won't install a datapath flow
* at all. If the reason to avoid caching goes away, the next upcall
* will immediately install a correct datapath flow.
*
* - Otherwise a datapath flow can be installed in the usual way.
*
* If 'avoid_caching' is true then 'slow' doesn't matter.
*/
enum slow_path_reason slow;
bool avoid_caching;
/* Recirc action IDs on which references are held. */
struct recirc_refs recircs;
};
struct xlate_in {
struct ofproto_dpif *ofproto;
ovs_version_t tables_version; /* Lookup in this version. */
/* Flow to which the OpenFlow actions apply. xlate_actions() will modify
* this flow when actions change header fields. */
struct flow flow;
/* Pointer to the original flow received during the upcall. xlate_actions()
* will never modify this flow. */
const struct flow *upcall_flow;
/* The packet corresponding to 'flow', or a null pointer if we are
* revalidating without a packet to refer to. */
const struct dp_packet *packet;
/* Should OFPP_NORMAL update the MAC learning table? Should "learn"
* actions update the flow table? Should FIN_TIMEOUT change the
* timeouts? Or should controller action send packet to the controller?
*
* We want to update these tables if we are actually processing a packet,
* or if we are accounting for packets that the datapath has processed, but
* not if we are just revalidating, or if we want to execute the
* side-effects later via the xlate cache. */
bool allow_side_effects;
/* The rule initiating translation or NULL. If both 'rule' and 'ofpacts'
* are NULL, xlate_actions() will do the initial rule lookup itself. */
struct rule_dpif *rule;
/* The actions to translate. If 'rule' is not NULL, these may be NULL. */
const struct ofpact *ofpacts;
size_t ofpacts_len;
/* Union of the set of TCP flags seen so far in this flow. (Used only by
* NXAST_FIN_TIMEOUT. Set to zero to avoid updating updating rules'
* timeouts.) */
uint16_t tcp_flags;
/* Set to nonnull to trace the translation. See ofproto-dpif-trace.h for
* more information. This points to the list of oftrace nodes to which the
* translation should add tracing information (with oftrace_report()). */
struct ovs_list *trace;
/* If nonnull, flow translation credits the specified statistics to each
* rule reached through a resubmit or OFPP_TABLE action.
*
* This is normally null so the client has to set it manually after
* calling xlate_in_init(). */
const struct dpif_flow_stats *resubmit_stats;
/* Counters carried over from a pre-existing translation of a related flow.
* This can occur due to, e.g., the translation of an ARP packet that was
* generated as the result of outputting to a tunnel port. In that case,
* the original flow going to the tunnel is the related flow. Since the
* two flows are different, they should not use the same xlate_ctx
* structure. However, we still need limit the maximum recursion across
* the entire translation.
*
* These fields are normally set to zero, so the client has to set them
* manually after calling xlate_in_init(). In that case, they should be
* copied from the same-named fields in the related flow's xlate_ctx.
*
* These fields are really implementation details; the client doesn't care
* about what they mean. See the corresponding fields in xlate_ctx for
* real documentation. */
int depth;
int resubmits;
/* If nonnull, flow translation populates this cache with references to all
* modules that are affected by translation. This 'xlate_cache' may be
* passed to xlate_push_stats() to perform the same function as
* xlate_actions() without the full cost of translation.
*
* This is normally null so the client has to set it manually after
* calling xlate_in_init(). */
struct xlate_cache *xcache;
/* If nonnull, flow translation puts the resulting datapath actions in this
* buffer. If null, flow translation will not produce datapath actions. */
struct ofpbuf *odp_actions;
/* If nonnull, flow translation populates this with wildcards relevant in
* translation. Any fields that were used to calculate the action are set,
* to allow caching and kernel wildcarding to work. For example, if the
* flow lookup involved performing the "normal" action on IPv4 and ARP
* packets, 'wc' would have the 'in_port' (always set), 'dl_type' (flow
* match), 'vlan_tci' (normal action), and 'dl_dst' (normal action) fields
* set. */
struct flow_wildcards *wc;
/* The frozen state to be resumed, as returned by xlate_lookup(). */
const struct frozen_state *frozen_state;
/* If true, the packet to be translated is from a packet_out msg. */
bool in_packet_out;
/* ofproto/trace maintains this queue to trace flows that require
* recirculation. */
struct ovs_list *recirc_queue;
/* UUID of first non-patch port packet was received on.*/
struct uuid xport_uuid;
};
void xlate_ofproto_set(struct ofproto_dpif *, const char *name, struct dpif *,
const struct mac_learning *, struct stp *,
struct rstp *, const struct mcast_snooping *,
const struct mbridge *, const struct dpif_sflow *,
const struct dpif_ipfix *, const struct netflow *,
bool forward_bpdu, bool has_in_band,
const struct dpif_backer_support *support);
void xlate_remove_ofproto(struct ofproto_dpif *);
void xlate_bundle_set(struct ofproto_dpif *, struct ofbundle *,
const char *name, enum port_vlan_mode,
uint16_t qinq_ethtype, int vlan,
unsigned long *trunks, unsigned long *cvlans,
bool use_priority_tags,
const struct bond *, const struct lacp *,
bool floodable, bool protected);
void xlate_bundle_remove(struct ofbundle *);
void xlate_ofport_set(struct ofproto_dpif *, struct ofbundle *,
struct ofport_dpif *, ofp_port_t, odp_port_t,
const struct netdev *, const struct cfm *, const struct bfd *,
const struct lldp *, struct ofport_dpif *peer,
int stp_port_no, const struct rstp_port *rstp_port,
const struct ofproto_port_queue *qdscp,
size_t n_qdscp, enum ofputil_port_config,
enum ofputil_port_state, bool is_tunnel,
bool may_enable);
void xlate_ofport_remove(struct ofport_dpif *);
struct ofproto_dpif * xlate_lookup_ofproto(const struct dpif_backer *,
const struct flow *,
ofp_port_t *ofp_in_port,
char **errorp);
int xlate_lookup(const struct dpif_backer *, const struct flow *,
struct ofproto_dpif **, struct dpif_ipfix **,
struct dpif_sflow **, struct netflow **,
ofp_port_t *ofp_in_port);
enum xlate_error {
XLATE_OK = 0,
XLATE_BRIDGE_NOT_FOUND,
XLATE_RECURSION_TOO_DEEP,
XLATE_TOO_MANY_RESUBMITS,
XLATE_STACK_TOO_DEEP,
XLATE_NO_RECIRCULATION_CONTEXT,
XLATE_RECIRCULATION_CONFLICT,
XLATE_TOO_MANY_MPLS_LABELS,
XLATE_INVALID_TUNNEL_METADATA,
XLATE_UNSUPPORTED_PACKET_TYPE,
};
const char *xlate_strerror(enum xlate_error error);
enum xlate_error xlate_actions(struct xlate_in *, struct xlate_out *);
void xlate_in_init(struct xlate_in *, struct ofproto_dpif *, ovs_version_t,
const struct flow *, ofp_port_t in_port, struct rule_dpif *,
uint16_t tcp_flags, const struct dp_packet *packet,
struct flow_wildcards *, struct ofpbuf *odp_actions);
void xlate_out_uninit(struct xlate_out *);
enum ofperr xlate_resume(struct ofproto_dpif *,
const struct ofputil_packet_in_private *,
struct ofpbuf *odp_actions, enum slow_path_reason *,
struct flow *, struct xlate_cache *);
int xlate_send_packet(const struct ofport_dpif *, bool oam, struct dp_packet *);
void xlate_mac_learning_update(const struct ofproto_dpif *ofproto,
ofp_port_t in_port, struct eth_addr dl_src,
int vlan, bool is_grat_arp);
void xlate_set_support(const struct ofproto_dpif *,
const struct dpif_backer_support *);
void xlate_txn_start(void);
void xlate_txn_commit(void);
#endif /* ofproto-dpif-xlate.h */
You can’t perform that action at this time.
You signed in with another tab or window. Reload to refresh your session. You signed out in another tab or window. Reload to refresh your session.