ofproto/ofproto.h

   1 /*
   2  * Copyright (c) 2009, 2010, 2011, 2012, 2013 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 OFPROTO_H
  18 #define OFPROTO_H 1
  19
  20 #include <sys/types.h>
  21 #include <netinet/in.h>
  22 #include <stdbool.h>
  23 #include <stddef.h>
  24 #include <stdint.h>
  25 #include "cfm.h"
  26 #include "flow.h"
  27 #include "netflow.h"
  28 #include "sset.h"
  29 #include "stp.h"
  30
  31 #ifdef  __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 struct bfd_cfg;
  36 struct cfm_settings;
  37 struct cls_rule;
  38 struct netdev;
  39 struct ofproto;
  40 struct ofport;
  41 struct shash;
  42 struct simap;
  43 struct smap;
  44 struct netdev_stats;
  45
  46 struct ofproto_controller_info {
  47     bool is_connected;
  48     enum ofp12_controller_role role;
  49     struct {
  50         const char *keys[4];
  51         const char *values[4];
  52         size_t n;
  53     } pairs;
  54 };
  55
  56 struct ofexpired {
  57     struct flow flow;
  58     uint64_t packet_count;      /* Packets from subrules. */
  59     uint64_t byte_count;        /* Bytes from subrules. */
  60     long long int used;         /* Last-used time (0 if never used). */
  61 };
  62
  63 struct ofproto_sflow_options {
  64     struct sset targets;
  65     uint32_t sampling_rate;
  66     uint32_t polling_interval;
  67     uint32_t header_len;
  68     uint32_t sub_id;
  69     char *agent_device;
  70     char *control_ip;
  71 };
  72
  73
  74 struct ofproto_ipfix_bridge_exporter_options {
  75     struct sset targets;
  76     uint32_t sampling_rate;
  77     uint32_t obs_domain_id;  /* Bridge-wide Observation Domain ID. */
  78     uint32_t obs_point_id;  /* Bridge-wide Observation Point ID. */
  79     uint32_t cache_active_timeout;
  80     uint32_t cache_max_flows;
  81 };
  82
  83 struct ofproto_ipfix_flow_exporter_options {
  84     uint32_t collector_set_id;
  85     struct sset targets;
  86     uint32_t cache_active_timeout;
  87     uint32_t cache_max_flows;
  88 };
  89
  90 struct ofproto_stp_settings {
  91     stp_identifier system_id;
  92     uint16_t priority;
  93     uint16_t hello_time;
  94     uint16_t max_age;
  95     uint16_t fwd_delay;
  96 };
  97
  98 struct ofproto_stp_status {
  99     bool enabled;               /* If false, ignore other members. */
 100     stp_identifier bridge_id;
 101     stp_identifier designated_root;
 102     int root_path_cost;
 103 };
 104
 105 struct ofproto_port_stp_settings {
 106     bool enable;
 107     uint8_t port_num;           /* In the range 1-255, inclusive. */
 108     uint8_t priority;
 109     uint16_t path_cost;
 110 };
 111
 112 struct ofproto_port_stp_status {
 113     bool enabled;               /* If false, ignore other members. */
 114     int port_id;
 115     enum stp_state state;
 116     unsigned int sec_in_state;
 117     enum stp_role role;
 118     int tx_count;               /* Number of BPDUs transmitted. */
 119     int rx_count;               /* Number of valid BPDUs received. */
 120     int error_count;            /* Number of bad BPDUs received. */
 121 };
 122
 123 struct ofproto_port_queue {
 124     uint32_t queue;             /* Queue ID. */
 125     uint8_t dscp;               /* DSCP bits (e.g. [0, 63]). */
 126 };
 127
 128 /* How the switch should act if the controller cannot be contacted. */
 129 enum ofproto_fail_mode {
 130     OFPROTO_FAIL_SECURE,        /* Preserve flow table. */
 131     OFPROTO_FAIL_STANDALONE     /* Act as a standalone switch. */
 132 };
 133
 134 enum ofproto_band {
 135     OFPROTO_IN_BAND,            /* In-band connection to controller. */
 136     OFPROTO_OUT_OF_BAND         /* Out-of-band connection to controller. */
 137 };
 138
 139 struct ofproto_controller {
 140     char *target;               /* e.g. "tcp:127.0.0.1" */
 141     int max_backoff;            /* Maximum reconnection backoff, in seconds. */
 142     int probe_interval;         /* Max idle time before probing, in seconds. */
 143     enum ofproto_band band;     /* In-band or out-of-band? */
 144     bool enable_async_msgs;     /* Initially enable asynchronous messages? */
 145
 146     /* OpenFlow packet-in rate-limiting. */
 147     int rate_limit;             /* Max packet-in rate in packets per second. */
 148     int burst_limit;            /* Limit on accumulating packet credits. */
 149
 150     uint8_t dscp;               /* DSCP value for controller connection. */
 151 };
 152
 153 void ofproto_enumerate_types(struct sset *types);
 154 const char *ofproto_normalize_type(const char *);
 155
 156 int ofproto_enumerate_names(const char *type, struct sset *names);
 157 void ofproto_parse_name(const char *name, char **dp_name, char **dp_type);
 158
 159 /* An interface hint element, which is used by ofproto_init() to
 160  * describe the caller's understanding of the startup state. */
 161 struct iface_hint {
 162     char *br_name;              /* Name of owning bridge. */
 163     char *br_type;              /* Type of owning bridge. */
 164     ofp_port_t ofp_port;        /* OpenFlow port number. */
 165 };
 166
 167 void ofproto_init(const struct shash *iface_hints);
 168
 169 int ofproto_type_run(const char *datapath_type);
 170 int ofproto_type_run_fast(const char *datapath_type);
 171 void ofproto_type_wait(const char *datapath_type);
 172
 173 int ofproto_create(const char *datapath, const char *datapath_type,
 174                    struct ofproto **ofprotop);
 175 void ofproto_destroy(struct ofproto *);
 176 int ofproto_delete(const char *name, const char *type);
 177
 178 int ofproto_run(struct ofproto *);
 179 int ofproto_run_fast(struct ofproto *);
 180 void ofproto_wait(struct ofproto *);
 181 bool ofproto_is_alive(const struct ofproto *);
 182
 183 void ofproto_get_memory_usage(const struct ofproto *, struct simap *);
 184
 185 /* A port within an OpenFlow switch.
 186  *
 187  * 'name' and 'type' are suitable for passing to netdev_open(). */
 188 struct ofproto_port {
 189     char *name;                 /* Network device name, e.g. "eth0". */
 190     char *type;                 /* Network device type, e.g. "system". */
 191     ofp_port_t ofp_port;        /* OpenFlow port number. */
 192 };
 193 void ofproto_port_clone(struct ofproto_port *, const struct ofproto_port *);
 194 void ofproto_port_destroy(struct ofproto_port *);
 195
 196 struct ofproto_port_dump {
 197     const struct ofproto *ofproto;
 198     int error;
 199     void *state;
 200 };
 201 void ofproto_port_dump_start(struct ofproto_port_dump *,
 202                              const struct ofproto *);
 203 bool ofproto_port_dump_next(struct ofproto_port_dump *, struct ofproto_port *);
 204 int ofproto_port_dump_done(struct ofproto_port_dump *);
 205
 206 /* Iterates through each OFPROTO_PORT in OFPROTO, using DUMP as state.
 207  *
 208  * Arguments all have pointer type.
 209  *
 210  * If you break out of the loop, then you need to free the dump structure by
 211  * hand using ofproto_port_dump_done(). */
 212 #define OFPROTO_PORT_FOR_EACH(OFPROTO_PORT, DUMP, OFPROTO)  \
 213     for (ofproto_port_dump_start(DUMP, OFPROTO);            \
 214          (ofproto_port_dump_next(DUMP, OFPROTO_PORT)        \
 215           ? true                                            \
 216           : (ofproto_port_dump_done(DUMP), false));         \
 217         )
 218
 219 #define OFPROTO_FLOW_EVICTION_THRESHOLD_DEFAULT  2500
 220 #define OFPROTO_FLOW_EVICTION_THRESHOLD_MIN 100
 221
 222 /* How flow misses should be handled in ofproto-dpif */
 223 enum ofproto_flow_miss_model {
 224     OFPROTO_HANDLE_MISS_AUTO,           /* Based on flow eviction threshold. */
 225     OFPROTO_HANDLE_MISS_WITH_FACETS,    /* Always create facets. */
 226     OFPROTO_HANDLE_MISS_WITHOUT_FACETS  /* Always handle without facets.*/
 227 };
 228
 229 const char *ofproto_port_open_type(const char *datapath_type,
 230                                    const char *port_type);
 231 int ofproto_port_add(struct ofproto *, struct netdev *, ofp_port_t *ofp_portp);
 232 int ofproto_port_del(struct ofproto *, ofp_port_t ofp_port);
 233 int ofproto_port_get_stats(const struct ofport *, struct netdev_stats *stats);
 234
 235 int ofproto_port_query_by_name(const struct ofproto *, const char *devname,
 236                                struct ofproto_port *);
 237
 238 /* Top-level configuration. */
 239 uint64_t ofproto_get_datapath_id(const struct ofproto *);
 240 void ofproto_set_datapath_id(struct ofproto *, uint64_t datapath_id);
 241 void ofproto_set_controllers(struct ofproto *,
 242                              const struct ofproto_controller *, size_t n,
 243                              uint32_t allowed_versions);
 244 void ofproto_set_fail_mode(struct ofproto *, enum ofproto_fail_mode fail_mode);
 245 void ofproto_reconnect_controllers(struct ofproto *);
 246 void ofproto_set_extra_in_band_remotes(struct ofproto *,
 247                                        const struct sockaddr_in *, size_t n);
 248 void ofproto_set_in_band_queue(struct ofproto *, int queue_id);
 249 void ofproto_set_flow_eviction_threshold(unsigned threshold);
 250 void ofproto_set_flow_miss_model(unsigned model);
 251 void ofproto_set_forward_bpdu(struct ofproto *, bool forward_bpdu);
 252 void ofproto_set_mac_table_config(struct ofproto *, unsigned idle_time,
 253                                   size_t max_entries);
 254 void ofproto_set_n_handler_threads(unsigned limit);
 255 void ofproto_set_dp_desc(struct ofproto *, const char *dp_desc);
 256 int ofproto_set_snoops(struct ofproto *, const struct sset *snoops);
 257 int ofproto_set_netflow(struct ofproto *,
 258                         const struct netflow_options *nf_options);
 259 int ofproto_set_sflow(struct ofproto *, const struct ofproto_sflow_options *);
 260 int ofproto_set_ipfix(struct ofproto *,
 261                       const struct ofproto_ipfix_bridge_exporter_options *,
 262                       const struct ofproto_ipfix_flow_exporter_options *,
 263                       size_t);
 264 void ofproto_set_flow_restore_wait(bool flow_restore_wait_db);
 265 bool ofproto_get_flow_restore_wait(void);
 266 int ofproto_set_stp(struct ofproto *, const struct ofproto_stp_settings *);
 267 int ofproto_get_stp_status(struct ofproto *, struct ofproto_stp_status *);
 268
 269 /* Configuration of ports. */
 270 void ofproto_port_unregister(struct ofproto *, ofp_port_t ofp_port);
 271
 272 void ofproto_port_clear_cfm(struct ofproto *, ofp_port_t ofp_port);
 273 void ofproto_port_set_cfm(struct ofproto *, ofp_port_t ofp_port,
 274                           const struct cfm_settings *);
 275 void ofproto_port_set_bfd(struct ofproto *, ofp_port_t ofp_port,
 276                           const struct smap *cfg);
 277 int ofproto_port_get_bfd_status(struct ofproto *, ofp_port_t ofp_port,
 278                                 struct smap *);
 279 int ofproto_port_is_lacp_current(struct ofproto *, ofp_port_t ofp_port);
 280 int ofproto_port_set_stp(struct ofproto *, ofp_port_t ofp_port,
 281                          const struct ofproto_port_stp_settings *);
 282 int ofproto_port_get_stp_status(struct ofproto *, ofp_port_t ofp_port,
 283                                 struct ofproto_port_stp_status *);
 284 int ofproto_port_set_queues(struct ofproto *, ofp_port_t ofp_port,
 285                             const struct ofproto_port_queue *,
 286                             size_t n_queues);
 287
 288 /* The behaviour of the port regarding VLAN handling */
 289 enum port_vlan_mode {
 290     /* This port is an access port.  'vlan' is the VLAN ID.  'trunks' is
 291      * ignored. */
 292     PORT_VLAN_ACCESS,
 293
 294     /* This port is a trunk.  'trunks' is the set of trunks. 'vlan' is
 295      * ignored. */
 296     PORT_VLAN_TRUNK,
 297
 298     /* Untagged incoming packets are part of 'vlan', as are incoming packets
 299      * tagged with 'vlan'.  Outgoing packets tagged with 'vlan' stay tagged.
 300      * Other VLANs in 'trunks' are trunked. */
 301     PORT_VLAN_NATIVE_TAGGED,
 302
 303     /* Untagged incoming packets are part of 'vlan', as are incoming packets
 304      * tagged with 'vlan'.  Outgoing packets tagged with 'vlan' are untagged.
 305      * Other VLANs in 'trunks' are trunked. */
 306     PORT_VLAN_NATIVE_UNTAGGED
 307 };
 308
 309 /* Configuration of bundles. */
 310 struct ofproto_bundle_settings {
 311     char *name;                 /* For use in log messages. */
 312
 313     ofp_port_t *slaves;         /* OpenFlow port numbers for slaves. */
 314     size_t n_slaves;
 315
 316     enum port_vlan_mode vlan_mode; /* Selects mode for vlan and trunks */
 317     int vlan;                   /* VLAN VID, except for PORT_VLAN_TRUNK. */
 318     unsigned long *trunks;      /* vlan_bitmap, except for PORT_VLAN_ACCESS. */
 319     bool use_priority_tags;     /* Use 802.1p tag for frames in VLAN 0? */
 320
 321     struct bond_settings *bond; /* Must be nonnull iff if n_slaves > 1. */
 322
 323     struct lacp_settings *lacp;              /* Nonnull to enable LACP. */
 324     struct lacp_slave_settings *lacp_slaves; /* Array of n_slaves elements. */
 325
 326     /* Linux VLAN device support (e.g. "eth0.10" for VLAN 10.)
 327      *
 328      * This is deprecated.  It is only for compatibility with broken device
 329      * drivers in old versions of Linux that do not properly support VLANs when
 330      * VLAN devices are not used.  When broken device drivers are no longer in
 331      * widespread use, we will delete these interfaces. */
 332     ofp_port_t realdev_ofp_port;/* OpenFlow port number of real device. */
 333 };
 334
 335 int ofproto_bundle_register(struct ofproto *, void *aux,
 336                             const struct ofproto_bundle_settings *);
 337 int ofproto_bundle_unregister(struct ofproto *, void *aux);
 338
 339 /* Configuration of mirrors. */
 340 struct ofproto_mirror_settings {
 341     /* Name for log messages. */
 342     char *name;
 343
 344     /* Bundles that select packets for mirroring upon ingress.  */
 345     void **srcs;                /* A set of registered ofbundle handles. */
 346     size_t n_srcs;
 347
 348     /* Bundles that select packets for mirroring upon egress.  */
 349     void **dsts;                /* A set of registered ofbundle handles. */
 350     size_t n_dsts;
 351
 352     /* VLANs of packets to select for mirroring. */
 353     unsigned long *src_vlans;   /* vlan_bitmap, NULL selects all VLANs. */
 354
 355     /* Output (mutually exclusive). */
 356     void *out_bundle;           /* A registered ofbundle handle or NULL. */
 357     uint16_t out_vlan;          /* Output VLAN, only if out_bundle is NULL. */
 358 };
 359
 360 int ofproto_mirror_register(struct ofproto *, void *aux,
 361                             const struct ofproto_mirror_settings *);
 362 int ofproto_mirror_unregister(struct ofproto *, void *aux);
 363 int ofproto_mirror_get_stats(struct ofproto *, void *aux,
 364                              uint64_t *packets, uint64_t *bytes);
 365
 366 int ofproto_set_flood_vlans(struct ofproto *, unsigned long *flood_vlans);
 367 bool ofproto_is_mirror_output_bundle(const struct ofproto *, void *aux);
 368
 369 /* Configuration of OpenFlow tables. */
 370 struct ofproto_table_settings {
 371     char *name;                 /* Name exported via OpenFlow or NULL. */
 372     unsigned int max_flows;     /* Maximum number of flows or UINT_MAX. */
 373
 374     /* These members determine the handling of an attempt to add a flow that
 375      * would cause the table to have more than 'max_flows' flows.
 376      *
 377      * If 'groups' is NULL, overflows will be rejected with an error.
 378      *
 379      * If 'groups' is nonnull, an overflow will cause a flow to be removed.
 380      * The flow to be removed is chosen to give fairness among groups
 381      * distinguished by different values for the subfields within 'groups'. */
 382     struct mf_subfield *groups;
 383     size_t n_groups;
 384 };
 385
 386 int ofproto_get_n_tables(const struct ofproto *);
 387 void ofproto_configure_table(struct ofproto *, int table_id,
 388                              const struct ofproto_table_settings *);
 389
 390 /* Configuration querying. */
 391 bool ofproto_has_snoops(const struct ofproto *);
 392 void ofproto_get_snoops(const struct ofproto *, struct sset *);
 393 void ofproto_get_all_flows(struct ofproto *p, struct ds *);
 394 void ofproto_get_netflow_ids(const struct ofproto *,
 395                              uint8_t *engine_type, uint8_t *engine_id);
 396
 397 void ofproto_get_ofproto_controller_info(const struct ofproto *, struct shash *);
 398 void ofproto_free_ofproto_controller_info(struct shash *);
 399
 400 /* CFM status query. */
 401 struct ofproto_cfm_status {
 402     /* 0 if not faulted, otherwise a combination of one or more reasons. */
 403     enum cfm_fault_reason faults;
 404
 405     /* 0 if the remote CFM endpoint is operationally down,
 406      * 1 if the remote CFM endpoint is operationally up,
 407      * -1 if we don't know because the remote CFM endpoint is not in extended
 408      * mode. */
 409     int remote_opstate;
 410
 411     uint64_t flap_count;
 412
 413     /* Ordinarily a "health status" in the range 0...100 inclusive, with 0
 414      * being worst and 100 being best, or -1 if the health status is not
 415      * well-defined. */
 416     int health;
 417
 418     /* MPIDs of remote maintenance points whose CCMs have been received. */
 419     uint64_t *rmps;
 420     size_t n_rmps;
 421 };
 422
 423 bool ofproto_port_get_cfm_status(const struct ofproto *,
 424                                  ofp_port_t ofp_port,
 425                                  struct ofproto_cfm_status *);
 426 \f
 427 /* Linux VLAN device support (e.g. "eth0.10" for VLAN 10.)
 428  *
 429  * This is deprecated.  It is only for compatibility with broken device drivers
 430  * in old versions of Linux that do not properly support VLANs when VLAN
 431  * devices are not used.  When broken device drivers are no longer in
 432  * widespread use, we will delete these interfaces. */
 433
 434 void ofproto_get_vlan_usage(struct ofproto *, unsigned long int *vlan_bitmap);
 435 bool ofproto_has_vlan_usage_changed(const struct ofproto *);
 436 int ofproto_port_set_realdev(struct ofproto *, ofp_port_t vlandev_ofp_port,
 437                              ofp_port_t realdev_ofp_port, int vid);
 438
 439 #ifdef  __cplusplus
 440 }
 441 #endif
 442
 443 #endif /* ofproto.h */