ofproto/ofproto.h

   1 /*
   2  * Copyright (c) 2009, 2010, 2011 Nicira Networks.
   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 #include "tag.h"
  31
  32 #ifdef  __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 struct cfm_settings;
  37 struct cls_rule;
  38 struct netdev;
  39 struct ofproto;
  40 struct ofport;
  41 struct shash;
  42 struct netdev_stats;
  43
  44 struct ofproto_controller_info {
  45     bool is_connected;
  46     enum nx_role role;
  47     struct {
  48         const char *keys[4];
  49         const char *values[4];
  50         size_t n;
  51     } pairs;
  52 };
  53
  54 struct ofexpired {
  55     struct flow flow;
  56     uint64_t packet_count;      /* Packets from subrules. */
  57     uint64_t byte_count;        /* Bytes from subrules. */
  58     long long int used;         /* Last-used time (0 if never used). */
  59 };
  60
  61 struct ofproto_sflow_options {
  62     struct sset targets;
  63     uint32_t sampling_rate;
  64     uint32_t polling_interval;
  65     uint32_t header_len;
  66     uint32_t sub_id;
  67     char *agent_device;
  68     char *control_ip;
  69 };
  70
  71 struct ofproto_stp_settings {
  72     stp_identifier system_id;
  73     uint16_t priority;
  74     uint16_t hello_time;
  75     uint16_t max_age;
  76     uint16_t fwd_delay;
  77 };
  78
  79 struct ofproto_stp_status {
  80     bool enabled;               /* If false, ignore other members. */
  81     stp_identifier bridge_id;
  82     stp_identifier designated_root;
  83     int root_path_cost;
  84 };
  85
  86 struct ofproto_port_stp_settings {
  87     bool enable;
  88     uint8_t port_num;           /* In the range 1-255, inclusive. */
  89     uint8_t priority;
  90     uint16_t path_cost;
  91 };
  92
  93 struct ofproto_port_stp_status {
  94     bool enabled;               /* If false, ignore other members. */
  95     int port_id;
  96     enum stp_state state;
  97     unsigned int sec_in_state;
  98     enum stp_role role;
  99     int tx_count;               /* Number of BPDUs transmitted. */
 100     int rx_count;               /* Number of valid BPDUs received. */
 101     int error_count;            /* Number of bad BPDUs received. */
 102 };
 103
 104 struct ofproto_port_queue {
 105     uint32_t queue;             /* Queue ID. */
 106     uint8_t dscp;               /* DSCP bits (e.g. [0, 63]). */
 107 };
 108
 109 /* How the switch should act if the controller cannot be contacted. */
 110 enum ofproto_fail_mode {
 111     OFPROTO_FAIL_SECURE,        /* Preserve flow table. */
 112     OFPROTO_FAIL_STANDALONE     /* Act as a standalone switch. */
 113 };
 114
 115 enum ofproto_band {
 116     OFPROTO_IN_BAND,            /* In-band connection to controller. */
 117     OFPROTO_OUT_OF_BAND         /* Out-of-band connection to controller. */
 118 };
 119
 120 struct ofproto_controller {
 121     char *target;               /* e.g. "tcp:127.0.0.1" */
 122     int max_backoff;            /* Maximum reconnection backoff, in seconds. */
 123     int probe_interval;         /* Max idle time before probing, in seconds. */
 124     enum ofproto_band band;      /* In-band or out-of-band? */
 125
 126     /* OpenFlow packet-in rate-limiting. */
 127     int rate_limit;             /* Max packet-in rate in packets per second. */
 128     int burst_limit;            /* Limit on accumulating packet credits. */
 129 };
 130
 131 #define DEFAULT_MFR_DESC "Nicira Networks, Inc."
 132 #define DEFAULT_HW_DESC "Open vSwitch"
 133 #define DEFAULT_SW_DESC VERSION BUILDNR
 134 #define DEFAULT_SERIAL_DESC "None"
 135 #define DEFAULT_DP_DESC "None"
 136
 137 void ofproto_enumerate_types(struct sset *types);
 138 const char *ofproto_normalize_type(const char *);
 139
 140 int ofproto_enumerate_names(const char *type, struct sset *names);
 141 void ofproto_parse_name(const char *name, char **dp_name, char **dp_type);
 142
 143 int ofproto_create(const char *datapath, const char *datapath_type,
 144                    struct ofproto **ofprotop);
 145 void ofproto_destroy(struct ofproto *);
 146 int ofproto_delete(const char *name, const char *type);
 147
 148 int ofproto_run(struct ofproto *);
 149 int ofproto_run_fast(struct ofproto *);
 150 void ofproto_wait(struct ofproto *);
 151 bool ofproto_is_alive(const struct ofproto *);
 152
 153 /* A port within an OpenFlow switch.
 154  *
 155  * 'name' and 'type' are suitable for passing to netdev_open(). */
 156 struct ofproto_port {
 157     char *name;                 /* Network device name, e.g. "eth0". */
 158     char *type;                 /* Network device type, e.g. "system". */
 159     uint16_t ofp_port;          /* OpenFlow port number. */
 160 };
 161 void ofproto_port_clone(struct ofproto_port *, const struct ofproto_port *);
 162 void ofproto_port_destroy(struct ofproto_port *);
 163
 164 struct ofproto_port_dump {
 165     const struct ofproto *ofproto;
 166     int error;
 167     void *state;
 168 };
 169 void ofproto_port_dump_start(struct ofproto_port_dump *,
 170                              const struct ofproto *);
 171 bool ofproto_port_dump_next(struct ofproto_port_dump *, struct ofproto_port *);
 172 int ofproto_port_dump_done(struct ofproto_port_dump *);
 173
 174 /* Iterates through each OFPROTO_PORT in OFPROTO, using DUMP as state.
 175  *
 176  * Arguments all have pointer type.
 177  *
 178  * If you break out of the loop, then you need to free the dump structure by
 179  * hand using ofproto_port_dump_done(). */
 180 #define OFPROTO_PORT_FOR_EACH(OFPROTO_PORT, DUMP, OFPROTO)  \
 181     for (ofproto_port_dump_start(DUMP, OFPROTO);            \
 182          (ofproto_port_dump_next(DUMP, OFPROTO_PORT)        \
 183           ? true                                            \
 184           : (ofproto_port_dump_done(DUMP), false));         \
 185         )
 186
 187 #define OFPROTO_FLOW_EVICTON_THRESHOLD_DEFAULT  1000
 188 #define OFPROTO_FLOW_EVICTION_THRESHOLD_MIN     100
 189
 190 int ofproto_port_add(struct ofproto *, struct netdev *, uint16_t *ofp_portp);
 191 int ofproto_port_del(struct ofproto *, uint16_t ofp_port);
 192 int ofproto_port_get_stats(const struct ofport *, struct netdev_stats *stats);
 193
 194 int ofproto_port_query_by_name(const struct ofproto *, const char *devname,
 195                                struct ofproto_port *);
 196
 197 /* Top-level configuration. */
 198 void ofproto_set_datapath_id(struct ofproto *, uint64_t datapath_id);
 199 void ofproto_set_controllers(struct ofproto *,
 200                              const struct ofproto_controller *, size_t n);
 201 void ofproto_set_fail_mode(struct ofproto *, enum ofproto_fail_mode fail_mode);
 202 void ofproto_reconnect_controllers(struct ofproto *);
 203 void ofproto_set_extra_in_band_remotes(struct ofproto *,
 204                                        const struct sockaddr_in *, size_t n);
 205 void ofproto_set_in_band_queue(struct ofproto *, int queue_id);
 206 void ofproto_set_flow_eviction_threshold(struct ofproto *, unsigned threshold);
 207 void ofproto_set_forward_bpdu(struct ofproto *, bool forward_bpdu);
 208 void ofproto_set_desc(struct ofproto *,
 209                       const char *mfr_desc, const char *hw_desc,
 210                       const char *sw_desc, const char *serial_desc,
 211                       const char *dp_desc);
 212 int ofproto_set_snoops(struct ofproto *, const struct sset *snoops);
 213 int ofproto_set_netflow(struct ofproto *,
 214                         const struct netflow_options *nf_options);
 215 int ofproto_set_sflow(struct ofproto *, const struct ofproto_sflow_options *);
 216 int ofproto_set_stp(struct ofproto *, const struct ofproto_stp_settings *);
 217 int ofproto_get_stp_status(struct ofproto *, struct ofproto_stp_status *);
 218
 219 /* Configuration of ports. */
 220 void ofproto_port_unregister(struct ofproto *, uint16_t ofp_port);
 221
 222 void ofproto_port_clear_cfm(struct ofproto *, uint16_t ofp_port);
 223 void ofproto_port_set_cfm(struct ofproto *, uint16_t ofp_port,
 224                           const struct cfm_settings *);
 225 int ofproto_port_is_lacp_current(struct ofproto *, uint16_t ofp_port);
 226 int ofproto_port_set_stp(struct ofproto *, uint16_t ofp_port,
 227                          const struct ofproto_port_stp_settings *);
 228 int ofproto_port_get_stp_status(struct ofproto *, uint16_t ofp_port,
 229                                 struct ofproto_port_stp_status *);
 230 int ofproto_port_set_queues(struct ofproto *, uint16_t ofp_port,
 231                             const struct ofproto_port_queue *,
 232                             size_t n_queues);
 233
 234 /* The behaviour of the port regarding VLAN handling */
 235 enum port_vlan_mode {
 236     /* This port is an access port.  'vlan' is the VLAN ID.  'trunks' is
 237      * ignored. */
 238     PORT_VLAN_ACCESS,
 239
 240     /* This port is a trunk.  'trunks' is the set of trunks. 'vlan' is
 241      * ignored. */
 242     PORT_VLAN_TRUNK,
 243
 244     /* Untagged incoming packets are part of 'vlan', as are incoming packets
 245      * tagged with 'vlan'.  Outgoing packets tagged with 'vlan' stay tagged.
 246      * Other VLANs in 'trunks' are trunked. */
 247     PORT_VLAN_NATIVE_TAGGED,
 248
 249     /* Untagged incoming packets are part of 'vlan', as are incoming packets
 250      * tagged with 'vlan'.  Outgoing packets tagged with 'vlan' are untagged.
 251      * Other VLANs in 'trunks' are trunked. */
 252     PORT_VLAN_NATIVE_UNTAGGED
 253 };
 254
 255 /* Configuration of bundles. */
 256 struct ofproto_bundle_settings {
 257     char *name;                 /* For use in log messages. */
 258
 259     uint16_t *slaves;           /* OpenFlow port numbers for slaves. */
 260     size_t n_slaves;
 261
 262     enum port_vlan_mode vlan_mode; /* Selects mode for vlan and trunks */
 263     int vlan;                   /* VLAN VID, except for PORT_VLAN_TRUNK. */
 264     unsigned long *trunks;      /* vlan_bitmap, except for PORT_VLAN_ACCESS. */
 265     bool use_priority_tags;     /* Use 802.1p tag for frames in VLAN 0? */
 266
 267     struct bond_settings *bond; /* Must be nonnull iff if n_slaves > 1. */
 268     uint32_t *bond_stable_ids;  /* Array of n_slaves elements. */
 269
 270     struct lacp_settings *lacp;              /* Nonnull to enable LACP. */
 271     struct lacp_slave_settings *lacp_slaves; /* Array of n_slaves elements. */
 272
 273     /* Linux VLAN device support (e.g. "eth0.10" for VLAN 10.)
 274      *
 275      * This is deprecated.  It is only for compatibility with broken device
 276      * drivers in old versions of Linux that do not properly support VLANs when
 277      * VLAN devices are not used.  When broken device drivers are no longer in
 278      * widespread use, we will delete these interfaces. */
 279     uint16_t realdev_ofp_port;  /* OpenFlow port number of real device. */
 280 };
 281
 282 int ofproto_bundle_register(struct ofproto *, void *aux,
 283                             const struct ofproto_bundle_settings *);
 284 int ofproto_bundle_unregister(struct ofproto *, void *aux);
 285
 286 /* Configuration of mirrors. */
 287 struct ofproto_mirror_settings {
 288     /* Name for log messages. */
 289     char *name;
 290
 291     /* Bundles that select packets for mirroring upon ingress.  */
 292     void **srcs;                /* A set of registered ofbundle handles. */
 293     size_t n_srcs;
 294
 295     /* Bundles that select packets for mirroring upon egress.  */
 296     void **dsts;                /* A set of registered ofbundle handles. */
 297     size_t n_dsts;
 298
 299     /* VLANs of packets to select for mirroring. */
 300     unsigned long *src_vlans;   /* vlan_bitmap, NULL selects all VLANs. */
 301
 302     /* Output (mutually exclusive). */
 303     void *out_bundle;           /* A registered ofbundle handle or NULL. */
 304     uint16_t out_vlan;          /* Output VLAN, only if out_bundle is NULL. */
 305 };
 306
 307 int ofproto_mirror_register(struct ofproto *, void *aux,
 308                             const struct ofproto_mirror_settings *);
 309 int ofproto_mirror_unregister(struct ofproto *, void *aux);
 310 int ofproto_mirror_get_stats(struct ofproto *, void *aux,
 311                              uint64_t *packets, uint64_t *bytes);
 312
 313 int ofproto_set_flood_vlans(struct ofproto *, unsigned long *flood_vlans);
 314 bool ofproto_is_mirror_output_bundle(const struct ofproto *, void *aux);
 315
 316 /* Configuration of OpenFlow tables. */
 317 struct ofproto_table_settings {
 318     char *name;                 /* Name exported via OpenFlow or NULL. */
 319     unsigned int max_flows;     /* Maximum number of flows or UINT_MAX. */
 320
 321     /* These members determine the handling of an attempt to add a flow that
 322      * would cause the table to have more than 'max_flows' flows.
 323      *
 324      * If 'groups' is NULL, overflows will be rejected with an error.
 325      *
 326      * If 'groups' is nonnull, an overflow will cause a flow to be removed.
 327      * The flow to be removed is chosen to give fairness among groups
 328      * distinguished by different values for the subfields within 'groups'. */
 329     struct mf_subfield *groups;
 330     size_t n_groups;
 331 };
 332
 333 int ofproto_get_n_tables(const struct ofproto *);
 334 void ofproto_configure_table(struct ofproto *, int table_id,
 335                              const struct ofproto_table_settings *);
 336
 337 /* Configuration querying. */
 338 bool ofproto_has_snoops(const struct ofproto *);
 339 void ofproto_get_snoops(const struct ofproto *, struct sset *);
 340 void ofproto_get_all_flows(struct ofproto *p, struct ds *);
 341 void ofproto_get_netflow_ids(const struct ofproto *,
 342                              uint8_t *engine_type, uint8_t *engine_id);
 343 int ofproto_port_get_cfm_fault(const struct ofproto *, uint16_t ofp_port);
 344 int ofproto_port_get_cfm_remote_mpids(const struct ofproto *,
 345                                       uint16_t ofp_port, const uint64_t **rmps,
 346                                       size_t *n_rmps);
 347
 348 void ofproto_get_ofproto_controller_info(const struct ofproto *, struct shash *);
 349 void ofproto_free_ofproto_controller_info(struct shash *);
 350 \f
 351 /* Linux VLAN device support (e.g. "eth0.10" for VLAN 10.)
 352  *
 353  * This is deprecated.  It is only for compatibility with broken device drivers
 354  * in old versions of Linux that do not properly support VLANs when VLAN
 355  * devices are not used.  When broken device drivers are no longer in
 356  * widespread use, we will delete these interfaces. */
 357
 358 void ofproto_get_vlan_usage(struct ofproto *, unsigned long int *vlan_bitmap);
 359 bool ofproto_has_vlan_usage_changed(const struct ofproto *);
 360 int ofproto_port_set_realdev(struct ofproto *, uint16_t vlandev_ofp_port,
 361                              uint16_t realdev_ofp_port, int vid);
 362
 363 #ifdef  __cplusplus
 364 }
 365 #endif
 366
 367 #endif /* ofproto.h */