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/* Copyright (c) 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_TRACE_H
#define OFPROTO_DPIF_TRACE_H 1
/* Tracing
* =======
*
* The Open vSwitch software datapath based switch implementation supports
* "tracing". A trace describes what happens to a particular kind of packet as
* it passes through the switch, including information on each table, flow, and
* action that would apply to the packet. The trace is internally represented
* as a tree that reflects control flow; for example, an OpenFlow switch
* top-level node (of type OFT_BRIDGE) has a child node for each table visited
* by a packet (of type OFT_TABLE), and each table node has a child node for
* each action (OFT_ACTION) executed in the table.
*/
#include "openvswitch/dynamic-string.h"
#include "ofproto/ofproto-dpif.h"
#include "openvswitch/compiler.h"
#include "openvswitch/list.h"
#include "flow.h"
/* Type of a node within a trace. */
enum oftrace_node_type {
/* Nodes that may have children (nonterminal nodes). */
OFT_BRIDGE, /* Packet travel through an OpenFlow switch. */
OFT_TABLE, /* Packet travel through a flow table. */
OFT_BUCKET, /* Executing a bucket in an OpenFlow group. */
OFT_THAW, /* Thawing a frozen state. */
/* Nodes that never have children (terminal nodes). */
OFT_ACTION, /* An action. */
OFT_DETAIL, /* Some detail of an action. */
OFT_WARN, /* A worrisome situation. */
OFT_ERROR, /* An erroneous situation, worth logging. */
};
/* Reason why a flow is in a recirculation queue. */
enum oftrace_recirc_type {
OFT_RECIRC_CONNTRACK,
OFT_RECIRC_MPLS,
OFT_RECIRC_BOND,
};
/* A node within a trace. */
struct oftrace_node {
struct ovs_list node; /* In parent. */
struct ovs_list subs; /* List of "struct oftrace_node" children. */
enum oftrace_node_type type;
char *text;
};
/* A node within a recirculation queue. */
struct oftrace_recirc_node {
struct ovs_list node; /* In recirc_queue. */
enum oftrace_recirc_type type;
uint32_t recirc_id;
struct flow flow;
struct dp_packet *packet;
const struct ofpact_nat *nat_act;
};
/* A node within a next_ct_states list. */
struct oftrace_next_ct_state {
struct ovs_list node; /* In next_ct_states. */
uint32_t state;
};
void ofproto_dpif_trace_init(void);
void ofproto_trace(struct ofproto_dpif *ofproto, const struct flow *flow,
const struct dp_packet *packet,
const struct ofpact *, size_t ofpacts_len,
struct ovs_list *next_ct_states, struct ds *output,
bool names);
struct oftrace_node *oftrace_report(struct ovs_list *, enum oftrace_node_type,
const char *text);
bool oftrace_add_recirc_node(struct ovs_list *recirc_queue,
enum oftrace_recirc_type, const struct flow *,
const struct ofpact_nat *,
const struct dp_packet *, uint32_t recirc_id,
const uint16_t zone);
void ofproto_append_ports_to_map(struct ofputil_port_map *, struct hmap ports);
#endif /* ofproto-dpif-trace.h */
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