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 "list.h"
  23 #include "match.h"
  24 #include "ofp-errors.h"
  25 #include "ofp-util.h"
  26 #include "ofproto.h"
  27 #include "ofproto-provider.h"
  28 #include "openflow/nicira-ext.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     union {
  64         /* OAM_PACKET_IN. */
  65         struct {
  66             struct ofputil_packet_in up;
  67             int max_len;                /* From action, or -1 if none. */
  68         } pin;
  69     };
  70 };
  71 void ofproto_async_msg_free(struct ofproto_async_msg *);
  72
  73 /* Basics. */
  74 struct connmgr *connmgr_create(struct ofproto *ofproto,
  75                                const char *dpif_name, const char *local_name);
  76 void connmgr_destroy(struct connmgr *);
  77
  78 void connmgr_run(struct connmgr *,
  79                  void (*handle_openflow)(struct ofconn *,
  80                                          const struct ofpbuf *ofp_msg));
  81 void connmgr_wait(struct connmgr *);
  82
  83 void connmgr_get_memory_usage(const struct connmgr *, struct simap *usage);
  84
  85 struct ofproto *ofconn_get_ofproto(const struct ofconn *);
  86
  87 void connmgr_retry(struct connmgr *);
  88
  89 /* OpenFlow configuration. */
  90 bool connmgr_has_controllers(const struct connmgr *);
  91 void connmgr_get_controller_info(struct connmgr *, struct shash *);
  92 void connmgr_free_controller_info(struct shash *);
  93 void connmgr_set_controllers(struct connmgr *,
  94                              const struct ofproto_controller[], size_t n,
  95                              uint32_t allowed_versions);
  96 void connmgr_reconnect(const struct connmgr *);
  97
  98 int connmgr_set_snoops(struct connmgr *, const struct sset *snoops);
  99 bool connmgr_has_snoops(const struct connmgr *);
 100 void connmgr_get_snoops(const struct connmgr *, struct sset *snoops);
 101
 102 /* Individual connections to OpenFlow controllers. */
 103 enum ofconn_type ofconn_get_type(const struct ofconn *);
 104
 105 bool ofconn_get_master_election_id(const struct ofconn *, uint64_t *idp);
 106 bool ofconn_set_master_election_id(struct ofconn *, uint64_t);
 107 enum ofp12_controller_role ofconn_get_role(const struct ofconn *);
 108 void ofconn_set_role(struct ofconn *, enum ofp12_controller_role);
 109
 110 enum ofputil_protocol ofconn_get_protocol(const struct ofconn *);
 111 void ofconn_set_protocol(struct ofconn *, enum ofputil_protocol);
 112
 113 enum nx_packet_in_format ofconn_get_packet_in_format(struct ofconn *);
 114 void ofconn_set_packet_in_format(struct ofconn *, enum nx_packet_in_format);
 115
 116 void ofconn_set_controller_id(struct ofconn *, uint16_t controller_id);
 117
 118 void ofconn_set_invalid_ttl_to_controller(struct ofconn *, bool);
 119 bool ofconn_get_invalid_ttl_to_controller(struct ofconn *);
 120
 121 int ofconn_get_miss_send_len(const struct ofconn *);
 122 void ofconn_set_miss_send_len(struct ofconn *, int miss_send_len);
 123
 124 void ofconn_set_async_config(struct ofconn *,
 125                              const struct ofputil_async_cfg *);
 126 struct ofputil_async_cfg ofconn_get_async_config(const struct ofconn *);
 127
 128 void ofconn_send_reply(const struct ofconn *, struct ofpbuf *);
 129 void ofconn_send_replies(const struct ofconn *, struct ovs_list *);
 130 void ofconn_send_error(const struct ofconn *, const struct ofp_header *request,
 131                        enum ofperr);
 132
 133 enum ofperr ofconn_pktbuf_retrieve(struct ofconn *, uint32_t id,
 134                                    struct dp_packet **bufferp, ofp_port_t *in_port);
 135
 136 struct ofp_bundle;
 137
 138 struct ofp_bundle *ofconn_get_bundle(struct ofconn *, uint32_t id);
 139 enum ofperr ofconn_insert_bundle(struct ofconn *, struct ofp_bundle *);
 140 enum ofperr ofconn_remove_bundle(struct ofconn *, struct ofp_bundle *);
 141
 142 /* Logging flow_mod summaries. */
 143 void ofconn_report_flow_mod(struct ofconn *, enum ofp_flow_mod_command);
 144
 145 /* Sending asynchronous messages. */
 146 bool connmgr_wants_packet_in_on_miss(struct connmgr *mgr);
 147 void connmgr_send_port_status(struct connmgr *, struct ofconn *source,
 148                               const struct ofputil_phy_port *, uint8_t reason);
 149 void connmgr_send_flow_removed(struct connmgr *,
 150                                const struct ofputil_flow_removed *);
 151 void connmgr_send_async_msg(struct connmgr *,
 152                             const struct ofproto_async_msg *);
 153 void ofconn_send_role_status(struct ofconn *ofconn, uint32_t role,
 154                              uint8_t reason);
 155
 156 void connmgr_send_requestforward(struct connmgr *, const struct ofconn *source,
 157                                  const struct ofputil_requestforward *);
 158
 159 /* Fail-open settings. */
 160 enum ofproto_fail_mode connmgr_get_fail_mode(const struct connmgr *);
 161 void connmgr_set_fail_mode(struct connmgr *, enum ofproto_fail_mode);
 162
 163 /* Fail-open implementation. */
 164 int connmgr_get_max_probe_interval(const struct connmgr *);
 165 bool connmgr_is_any_controller_connected(const struct connmgr *);
 166 bool connmgr_is_any_controller_admitted(const struct connmgr *);
 167 int connmgr_failure_duration(const struct connmgr *);
 168
 169 /* In-band configuration. */
 170 void connmgr_set_extra_in_band_remotes(struct connmgr *,
 171                                        const struct sockaddr_in *, size_t);
 172 void connmgr_set_in_band_queue(struct connmgr *, int queue_id);
 173
 174 /* In-band implementation. */
 175 bool connmgr_has_in_band(struct connmgr *);
 176
 177 /* Fail-open and in-band implementation. */
 178 void connmgr_flushed(struct connmgr *);
 179
 180 int connmgr_count_hidden_rules(const struct connmgr *);
 181
 182 /* A flow monitor managed by NXST_FLOW_MONITOR and related requests. */
 183 struct ofmonitor {
 184     struct ofconn *ofconn;      /* Owning 'ofconn'. */
 185     struct hmap_node ofconn_node; /* In ofconn's 'monitors' hmap. */
 186     uint32_t id;
 187
 188     enum nx_flow_monitor_flags flags;
 189
 190     /* Matching. */
 191     ofp_port_t out_port;
 192     uint8_t table_id;
 193     struct minimatch match;
 194 };
 195
 196 struct ofputil_flow_monitor_request;
 197
 198 enum ofperr ofmonitor_create(const struct ofputil_flow_monitor_request *,
 199                              struct ofconn *, struct ofmonitor **)
 200     OVS_REQUIRES(ofproto_mutex);
 201 struct ofmonitor *ofmonitor_lookup(struct ofconn *, uint32_t id)
 202     OVS_REQUIRES(ofproto_mutex);
 203 void ofmonitor_destroy(struct ofmonitor *)
 204     OVS_REQUIRES(ofproto_mutex);
 205
 206 void ofmonitor_report(struct connmgr *, struct rule *,
 207                       enum nx_flow_update_event, enum ofp_flow_removed_reason,
 208                       const struct ofconn *abbrev_ofconn, ovs_be32 abbrev_xid,
 209                       const struct rule_actions *old_actions)
 210     OVS_REQUIRES(ofproto_mutex);
 211 void ofmonitor_flush(struct connmgr *) OVS_REQUIRES(ofproto_mutex);
 212
 213
 214 struct rule_collection;
 215 void ofmonitor_collect_resume_rules(struct ofmonitor *, uint64_t seqno,
 216                                     struct rule_collection *)
 217     OVS_REQUIRES(ofproto_mutex);
 218 void ofmonitor_compose_refresh_updates(struct rule_collection *rules,
 219                                        struct ovs_list *msgs)
 220     OVS_REQUIRES(ofproto_mutex);
 221
 222 #endif /* connmgr.h */