ofproto/connmgr.h

   1 /*
   2  * Copyright (c) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Nicira, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at:
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #ifndef CONNMGR_H
  18 #define CONNMGR_H 1
  19
  20 #include "classifier.h"
  21 #include "hmap.h"
  22 #include "openvswitch/list.h"
  23 #include "match.h"
  24 #include "ofp-util.h"
  25 #include "ofproto.h"
  26 #include "ofproto-provider.h"
  27 #include "openflow/nicira-ext.h"
  28 #include "openvswitch/ofp-errors.h"
  29 #include "openvswitch/types.h"
  30
  31 struct nlattr;
  32 struct ofconn;
  33 struct rule;
  34 struct simap;
  35 struct sset;
  36
  37 /* ofproto supports two kinds of OpenFlow connections:
  38  *
  39  *   - "Primary" connections to ordinary OpenFlow controllers.  ofproto
  40  *     maintains persistent connections to these controllers and by default
  41  *     sends them asynchronous messages such as packet-ins.
  42  *
  43  *   - "Service" connections, e.g. from ovs-ofctl.  When these connections
  44  *     drop, it is the other side's responsibility to reconnect them if
  45  *     necessary.  ofproto does not send them asynchronous messages by default.
  46  *
  47  * Currently, active (tcp, ssl, unix) connections are always "primary"
  48  * connections and passive (ptcp, pssl, punix) connections are always "service"
  49  * connections.  There is no inherent reason for this, but it reflects the
  50  * common case.
  51  */
  52 enum ofconn_type {
  53     OFCONN_PRIMARY,             /* An ordinary OpenFlow controller. */
  54     OFCONN_SERVICE              /* A service connection, e.g. "ovs-ofctl". */
  55 };
  56
  57 /* An asynchronous message that might need to be queued between threads. */
  58 struct ofproto_async_msg {
  59     struct ovs_list list_node;  /* For queuing. */
  60     uint16_t controller_id;     /* Controller ID to send to. */
  61
  62     enum ofputil_async_msg_type oam;
  63     /* OAM_PACKET_IN. */
  64     struct {
  65         struct ofputil_packet_in_private up;
  66         int max_len;            /* From action, or -1 if none. */
  67     } pin;
  68 };
  69 void ofproto_async_msg_free(struct ofproto_async_msg *);
  70
  71 /* Basics. */
  72 struct connmgr *connmgr_create(struct ofproto *ofproto,
  73                                const char *dpif_name, const char *local_name);
  74 void connmgr_destroy(struct connmgr *);
  75
  76 void connmgr_run(struct connmgr *,
  77                  void (*handle_openflow)(struct ofconn *,
  78                                          const struct ofpbuf *ofp_msg));
  79 void connmgr_wait(struct connmgr *);
  80
  81 void connmgr_get_memory_usage(const struct connmgr *, struct simap *usage);
  82
  83 struct ofproto *ofconn_get_ofproto(const struct ofconn *);
  84
  85 void connmgr_retry(struct connmgr *);
  86
  87 /* OpenFlow configuration. */
  88 bool connmgr_has_controllers(const struct connmgr *);
  89 void connmgr_get_controller_info(struct connmgr *, struct shash *);
  90 void connmgr_free_controller_info(struct shash *);
  91 void connmgr_set_controllers(struct connmgr *,
  92                              const struct ofproto_controller[], size_t n,
  93                              uint32_t allowed_versions);
  94 void connmgr_reconnect(const struct connmgr *);
  95
  96 int connmgr_set_snoops(struct connmgr *, const struct sset *snoops);
  97 bool connmgr_has_snoops(const struct connmgr *);
  98 void connmgr_get_snoops(const struct connmgr *, struct sset *snoops);
  99
 100 /* Individual connections to OpenFlow controllers. */
 101 enum ofconn_type ofconn_get_type(const struct ofconn *);
 102
 103 bool ofconn_get_master_election_id(const struct ofconn *, uint64_t *idp);
 104 bool ofconn_set_master_election_id(struct ofconn *, uint64_t);
 105 enum ofp12_controller_role ofconn_get_role(const struct ofconn *);
 106 void ofconn_set_role(struct ofconn *, enum ofp12_controller_role);
 107
 108 enum ofputil_protocol ofconn_get_protocol(const struct ofconn *);
 109 void ofconn_set_protocol(struct ofconn *, enum ofputil_protocol);
 110
 111 enum nx_packet_in_format ofconn_get_packet_in_format(struct ofconn *);
 112 void ofconn_set_packet_in_format(struct ofconn *, enum nx_packet_in_format);
 113
 114 void ofconn_set_controller_id(struct ofconn *, uint16_t controller_id);
 115
 116 void ofconn_set_invalid_ttl_to_controller(struct ofconn *, bool);
 117 bool ofconn_get_invalid_ttl_to_controller(struct ofconn *);
 118
 119 int ofconn_get_miss_send_len(const struct ofconn *);
 120 void ofconn_set_miss_send_len(struct ofconn *, int miss_send_len);
 121
 122 void ofconn_set_async_config(struct ofconn *,
 123                              const struct ofputil_async_cfg *);
 124 struct ofputil_async_cfg ofconn_get_async_config(const struct ofconn *);
 125
 126 void ofconn_send_reply(const struct ofconn *, struct ofpbuf *);
 127 void ofconn_send_replies(const struct ofconn *, struct ovs_list *);
 128 void ofconn_send_error(const struct ofconn *, const struct ofp_header *request,
 129                        enum ofperr);
 130
 131 enum ofperr ofconn_pktbuf_retrieve(struct ofconn *, uint32_t id,
 132                                    struct dp_packet **bufferp, ofp_port_t *in_port);
 133
 134 struct ofp_bundle;
 135
 136 struct ofp_bundle *ofconn_get_bundle(struct ofconn *, uint32_t id);
 137 enum ofperr ofconn_insert_bundle(struct ofconn *, struct ofp_bundle *);
 138 enum ofperr ofconn_remove_bundle(struct ofconn *, struct ofp_bundle *);
 139
 140 /* Logging flow_mod summaries. */
 141 void ofconn_report_flow_mod(struct ofconn *, enum ofp_flow_mod_command);
 142
 143 /* Sending asynchronous messages. */
 144 bool connmgr_wants_packet_in_on_miss(struct connmgr *mgr);
 145 void connmgr_send_port_status(struct connmgr *, struct ofconn *source,
 146                               const struct ofputil_phy_port *, uint8_t reason);
 147 void connmgr_send_flow_removed(struct connmgr *,
 148                                const struct ofputil_flow_removed *);
 149 void connmgr_send_async_msg(struct connmgr *,
 150                             const struct ofproto_async_msg *);
 151 void ofconn_send_role_status(struct ofconn *ofconn, uint32_t role,
 152                              uint8_t reason);
 153
 154 void connmgr_send_requestforward(struct connmgr *, const struct ofconn *source,
 155                                  const struct ofputil_requestforward *);
 156
 157 /* Fail-open settings. */
 158 enum ofproto_fail_mode connmgr_get_fail_mode(const struct connmgr *);
 159 void connmgr_set_fail_mode(struct connmgr *, enum ofproto_fail_mode);
 160
 161 /* Fail-open implementation. */
 162 int connmgr_get_max_probe_interval(const struct connmgr *);
 163 bool connmgr_is_any_controller_connected(const struct connmgr *);
 164 bool connmgr_is_any_controller_admitted(const struct connmgr *);
 165 int connmgr_failure_duration(const struct connmgr *);
 166
 167 /* In-band configuration. */
 168 void connmgr_set_extra_in_band_remotes(struct connmgr *,
 169                                        const struct sockaddr_in *, size_t);
 170 void connmgr_set_in_band_queue(struct connmgr *, int queue_id);
 171
 172 /* In-band implementation. */
 173 bool connmgr_has_in_band(struct connmgr *);
 174
 175 /* Fail-open and in-band implementation. */
 176 void connmgr_flushed(struct connmgr *);
 177
 178 int connmgr_count_hidden_rules(const struct connmgr *);
 179
 180 /* A flow monitor managed by NXST_FLOW_MONITOR and related requests. */
 181 struct ofmonitor {
 182     struct ofconn *ofconn;      /* Owning 'ofconn'. */
 183     struct hmap_node ofconn_node; /* In ofconn's 'monitors' hmap. */
 184     uint32_t id;
 185
 186     enum nx_flow_monitor_flags flags;
 187
 188     /* Matching. */
 189     ofp_port_t out_port;
 190     uint8_t table_id;
 191     struct minimatch match;
 192 };
 193
 194 struct ofputil_flow_monitor_request;
 195
 196 enum ofperr ofmonitor_create(const struct ofputil_flow_monitor_request *,
 197                              struct ofconn *, struct ofmonitor **)
 198     OVS_REQUIRES(ofproto_mutex);
 199 struct ofmonitor *ofmonitor_lookup(struct ofconn *, uint32_t id)
 200     OVS_REQUIRES(ofproto_mutex);
 201 void ofmonitor_destroy(struct ofmonitor *)
 202     OVS_REQUIRES(ofproto_mutex);
 203
 204 void ofmonitor_report(struct connmgr *, struct rule *,
 205                       enum nx_flow_update_event, enum ofp_flow_removed_reason,
 206                       const struct ofconn *abbrev_ofconn, ovs_be32 abbrev_xid,
 207                       const struct rule_actions *old_actions)
 208     OVS_REQUIRES(ofproto_mutex);
 209 void ofmonitor_flush(struct connmgr *) OVS_REQUIRES(ofproto_mutex);
 210
 211
 212 struct rule_collection;
 213 void ofmonitor_collect_resume_rules(struct ofmonitor *, uint64_t seqno,
 214                                     struct rule_collection *)
 215     OVS_REQUIRES(ofproto_mutex);
 216 void ofmonitor_compose_refresh_updates(struct rule_collection *rules,
 217                                        struct ovs_list *msgs)
 218     OVS_REQUIRES(ofproto_mutex);
 219
 220 void connmgr_send_table_status(struct connmgr *,
 221                                const struct ofputil_table_desc *td,
 222                                uint8_t reason);
 223 #endif /* connmgr.h */