lib/netdev.h

   1 /*
   2  * Copyright (c) 2008, 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 NETDEV_H
  18 #define NETDEV_H 1
  19
  20 #include <stdbool.h>
  21 #include <stddef.h>
  22 #include <stdint.h>
  23 #include "openvswitch/types.h"
  24 #include "packets.h"
  25 #include "flow.h"
  26
  27 #ifdef  __cplusplus
  28 extern "C" {
  29 #endif
  30
  31 /* Generic interface to network devices ("netdev"s).
  32  *
  33  * Every port on a switch must have a corresponding netdev that must minimally
  34  * support a few operations, such as the ability to read the netdev's MTU.
  35  * The PORTING file at the top of the source tree has more information in the
  36  * "Writing a netdev Provider" section.
  37  *
  38  * Thread-safety
  39  * =============
  40  *
  41  * Most of the netdev functions are fully thread-safe: they may be called from
  42  * any number of threads on the same or different netdev objects.  The
  43  * exceptions are:
  44  *
  45  *    netdev_rxq_recv()
  46  *    netdev_rxq_wait()
  47  *    netdev_rxq_drain()
  48  *
  49  *      These functions are conditionally thread-safe: they may be called from
  50  *      different threads only on different netdev_rxq objects.  (The client may
  51  *      create multiple netdev_rxq objects for a single netdev and access each
  52  *      of those from a different thread.)
  53  *
  54  *    NETDEV_FOR_EACH_QUEUE
  55  *    netdev_queue_dump_next()
  56  *    netdev_queue_dump_done()
  57  *
  58  *      These functions are conditionally thread-safe: they may be called from
  59  *      different threads only on different netdev_queue_dump objects.  (The
  60  *      client may create multiple netdev_queue_dump objects for a single
  61  *      netdev and access each of those from a different thread.)
  62  */
  63
  64 struct dp_packet;
  65 struct netdev;
  66 struct netdev_class;
  67 struct netdev_rxq;
  68 struct netdev_saved_flags;
  69 struct ofpbuf;
  70 struct in_addr;
  71 struct in6_addr;
  72 struct smap;
  73 struct sset;
  74 struct ovs_action_push_tnl;
  75
  76 /* Network device statistics.
  77  *
  78  * Values of unsupported statistics are set to all-1-bits (UINT64_MAX). */
  79 struct netdev_stats {
  80     uint64_t rx_packets;        /* Total packets received. */
  81     uint64_t tx_packets;        /* Total packets transmitted. */
  82     uint64_t rx_bytes;          /* Total bytes received. */
  83     uint64_t tx_bytes;          /* Total bytes transmitted. */
  84     uint64_t rx_errors;         /* Bad packets received. */
  85     uint64_t tx_errors;         /* Packet transmit problems. */
  86     uint64_t rx_dropped;        /* No buffer space. */
  87     uint64_t tx_dropped;        /* No buffer space. */
  88     uint64_t multicast;         /* Multicast packets received. */
  89     uint64_t collisions;
  90
  91     /* Detailed receive errors. */
  92     uint64_t rx_length_errors;
  93     uint64_t rx_over_errors;    /* Receiver ring buff overflow. */
  94     uint64_t rx_crc_errors;     /* Recved pkt with crc error. */
  95     uint64_t rx_frame_errors;   /* Recv'd frame alignment error. */
  96     uint64_t rx_fifo_errors;    /* Recv'r fifo overrun . */
  97     uint64_t rx_missed_errors;  /* Receiver missed packet. */
  98
  99     /* Detailed transmit errors. */
 100     uint64_t tx_aborted_errors;
 101     uint64_t tx_carrier_errors;
 102     uint64_t tx_fifo_errors;
 103     uint64_t tx_heartbeat_errors;
 104     uint64_t tx_window_errors;
 105 };
 106
 107 /* Configuration specific to tunnels. */
 108 struct netdev_tunnel_config {
 109     bool in_key_present;
 110     bool in_key_flow;
 111     ovs_be64 in_key;
 112
 113     bool out_key_present;
 114     bool out_key_flow;
 115     ovs_be64 out_key;
 116
 117     ovs_be16 dst_port;
 118
 119     bool ip_src_flow;
 120     bool ip_dst_flow;
 121     ovs_be32 ip_src;
 122     ovs_be32 ip_dst;
 123
 124     uint32_t exts;
 125
 126     uint8_t ttl;
 127     bool ttl_inherit;
 128
 129     uint8_t tos;
 130     bool tos_inherit;
 131
 132     bool csum;
 133     bool ipsec;
 134     bool dont_fragment;
 135 };
 136
 137 void netdev_run(void);
 138 void netdev_wait(void);
 139
 140 void netdev_enumerate_types(struct sset *types);
 141 bool netdev_is_reserved_name(const char *name);
 142
 143 int netdev_n_txq(const struct netdev *netdev);
 144 int netdev_n_rxq(const struct netdev *netdev);
 145 bool netdev_is_pmd(const struct netdev *netdev);
 146
 147 /* Open and close. */
 148 int netdev_open(const char *name, const char *type, struct netdev **netdevp);
 149
 150 struct netdev *netdev_ref(const struct netdev *);
 151 void netdev_remove(struct netdev *);
 152 void netdev_close(struct netdev *);
 153
 154 void netdev_parse_name(const char *netdev_name, char **name, char **type);
 155
 156 /* Options. */
 157 int netdev_set_config(struct netdev *, const struct smap *args, char **errp);
 158 int netdev_get_config(const struct netdev *, struct smap *);
 159 const struct netdev_tunnel_config *
 160     netdev_get_tunnel_config(const struct netdev *);
 161 int netdev_get_numa_id(const struct netdev *);
 162
 163 /* Basic properties. */
 164 const char *netdev_get_name(const struct netdev *);
 165 const char *netdev_get_type(const struct netdev *);
 166 const char *netdev_get_type_from_name(const char *);
 167 int netdev_get_mtu(const struct netdev *, int *mtup);
 168 int netdev_set_mtu(const struct netdev *, int mtu);
 169 int netdev_get_ifindex(const struct netdev *);
 170 int netdev_set_multiq(struct netdev *, unsigned int n_txq, unsigned int n_rxq);
 171
 172 /* Packet reception. */
 173 int netdev_rxq_open(struct netdev *, struct netdev_rxq **, int id);
 174 void netdev_rxq_close(struct netdev_rxq *);
 175
 176 const char *netdev_rxq_get_name(const struct netdev_rxq *);
 177
 178 int netdev_rxq_recv(struct netdev_rxq *rx, struct dp_packet **buffers,
 179                     int *cnt);
 180 void netdev_rxq_wait(struct netdev_rxq *);
 181 int netdev_rxq_drain(struct netdev_rxq *);
 182
 183 /* Packet transmission. */
 184 int netdev_send(struct netdev *, int qid, struct dp_packet **, int cnt,
 185                 bool may_steal);
 186 void netdev_send_wait(struct netdev *, int qid);
 187
 188 int netdev_build_header(const struct netdev *, struct ovs_action_push_tnl *data,
 189                         const struct flow *tnl_flow);
 190 int netdev_push_header(const struct netdev *netdev,
 191                        struct dp_packet **buffers, int cnt,
 192                        const struct ovs_action_push_tnl *data);
 193 int netdev_pop_header(struct netdev *netdev, struct dp_packet **buffers,
 194                       int cnt);
 195
 196 /* Hardware address. */
 197 int netdev_set_etheraddr(struct netdev *, const uint8_t mac[ETH_ADDR_LEN]);
 198 int netdev_get_etheraddr(const struct netdev *, uint8_t mac[ETH_ADDR_LEN]);
 199
 200 /* PHY interface. */
 201 bool netdev_get_carrier(const struct netdev *);
 202 long long int netdev_get_carrier_resets(const struct netdev *);
 203 int netdev_set_miimon_interval(struct netdev *, long long int interval);
 204
 205 /* Features. */
 206 enum netdev_features {
 207     NETDEV_F_10MB_HD =    1 << 0,  /* 10 Mb half-duplex rate support. */
 208     NETDEV_F_10MB_FD =    1 << 1,  /* 10 Mb full-duplex rate support. */
 209     NETDEV_F_100MB_HD =   1 << 2,  /* 100 Mb half-duplex rate support. */
 210     NETDEV_F_100MB_FD =   1 << 3,  /* 100 Mb full-duplex rate support. */
 211     NETDEV_F_1GB_HD =     1 << 4,  /* 1 Gb half-duplex rate support. */
 212     NETDEV_F_1GB_FD =     1 << 5,  /* 1 Gb full-duplex rate support. */
 213     NETDEV_F_10GB_FD =    1 << 6,  /* 10 Gb full-duplex rate support. */
 214     NETDEV_F_40GB_FD =    1 << 7,  /* 40 Gb full-duplex rate support. */
 215     NETDEV_F_100GB_FD =   1 << 8,  /* 100 Gb full-duplex rate support. */
 216     NETDEV_F_1TB_FD =     1 << 9,  /* 1 Tb full-duplex rate support. */
 217     NETDEV_F_OTHER =      1 << 10, /* Other rate, not in the list. */
 218     NETDEV_F_COPPER =     1 << 11, /* Copper medium. */
 219     NETDEV_F_FIBER =      1 << 12, /* Fiber medium. */
 220     NETDEV_F_AUTONEG =    1 << 13, /* Auto-negotiation. */
 221     NETDEV_F_PAUSE =      1 << 14, /* Pause. */
 222     NETDEV_F_PAUSE_ASYM = 1 << 15, /* Asymmetric pause. */
 223 };
 224
 225 int netdev_get_features(const struct netdev *,
 226                         enum netdev_features *current,
 227                         enum netdev_features *advertised,
 228                         enum netdev_features *supported,
 229                         enum netdev_features *peer);
 230 uint64_t netdev_features_to_bps(enum netdev_features features,
 231                                 uint64_t default_bps);
 232 bool netdev_features_is_full_duplex(enum netdev_features features);
 233 int netdev_set_advertisements(struct netdev *, enum netdev_features advertise);
 234
 235 /* Flags. */
 236 enum netdev_flags {
 237     NETDEV_UP = 0x0001,         /* Device enabled? */
 238     NETDEV_PROMISC = 0x0002,    /* Promiscuous mode? */
 239     NETDEV_LOOPBACK = 0x0004    /* This is a loopback device. */
 240 };
 241
 242 int netdev_get_flags(const struct netdev *, enum netdev_flags *);
 243 int netdev_set_flags(struct netdev *, enum netdev_flags,
 244                      struct netdev_saved_flags **);
 245 int netdev_turn_flags_on(struct netdev *, enum netdev_flags,
 246                          struct netdev_saved_flags **);
 247 int netdev_turn_flags_off(struct netdev *, enum netdev_flags,
 248                           struct netdev_saved_flags **);
 249
 250 void netdev_restore_flags(struct netdev_saved_flags *);
 251
 252 /* TCP/IP stack interface. */
 253 int netdev_get_in4(const struct netdev *, struct in_addr *address,
 254                    struct in_addr *netmask);
 255 int netdev_set_in4(struct netdev *, struct in_addr addr, struct in_addr mask);
 256 int netdev_get_in4_by_name(const char *device_name, struct in_addr *in4);
 257 int netdev_get_in6(const struct netdev *, struct in6_addr *);
 258 int netdev_add_router(struct netdev *, struct in_addr router);
 259 int netdev_get_next_hop(const struct netdev *, const struct in_addr *host,
 260                         struct in_addr *next_hop, char **);
 261 int netdev_get_status(const struct netdev *, struct smap *);
 262 int netdev_arp_lookup(const struct netdev *, ovs_be32 ip,
 263                       uint8_t mac[ETH_ADDR_LEN]);
 264
 265 struct netdev *netdev_find_dev_by_in4(const struct in_addr *);
 266
 267 /* Statistics. */
 268 int netdev_get_stats(const struct netdev *, struct netdev_stats *);
 269
 270 /* Quality of service. */
 271 struct netdev_qos_capabilities {
 272     unsigned int n_queues;
 273 };
 274
 275 struct netdev_queue_stats {
 276     /* Values of unsupported statistics are set to all-1-bits (UINT64_MAX). */
 277     uint64_t tx_bytes;
 278     uint64_t tx_packets;
 279     uint64_t tx_errors;
 280
 281     /* Time at which the queue was created, in msecs, LLONG_MIN if unknown. */
 282     long long int created;
 283 };
 284
 285 int netdev_set_policing(struct netdev *, uint32_t kbits_rate,
 286                         uint32_t kbits_burst);
 287
 288 int netdev_get_qos_types(const struct netdev *, struct sset *types);
 289 int netdev_get_qos_capabilities(const struct netdev *,
 290                                 const char *type,
 291                                 struct netdev_qos_capabilities *);
 292 int netdev_get_n_queues(const struct netdev *,
 293                         const char *type, unsigned int *n_queuesp);
 294
 295 int netdev_get_qos(const struct netdev *,
 296                    const char **typep, struct smap *details);
 297 int netdev_set_qos(struct netdev *,
 298                    const char *type, const struct smap *details);
 299
 300 int netdev_get_queue(const struct netdev *,
 301                      unsigned int queue_id, struct smap *details);
 302 int netdev_set_queue(struct netdev *,
 303                      unsigned int queue_id, const struct smap *details);
 304 int netdev_delete_queue(struct netdev *, unsigned int queue_id);
 305 int netdev_get_queue_stats(const struct netdev *, unsigned int queue_id,
 306                            struct netdev_queue_stats *);
 307 uint64_t netdev_get_change_seq(const struct netdev *);
 308
 309 struct netdev_queue_dump {
 310     struct netdev *netdev;
 311     int error;
 312     void *state;
 313 };
 314 void netdev_queue_dump_start(struct netdev_queue_dump *,
 315                              const struct netdev *);
 316 bool netdev_queue_dump_next(struct netdev_queue_dump *,
 317                             unsigned int *queue_id, struct smap *details);
 318 int netdev_queue_dump_done(struct netdev_queue_dump *);
 319
 320 /* Iterates through each queue in NETDEV, using DUMP as state.  Fills QUEUE_ID
 321  * and DETAILS with information about queues.  The client must initialize and
 322  * destroy DETAILS.
 323  *
 324  * Arguments all have pointer type.
 325  *
 326  * If you break out of the loop, then you need to free the dump structure by
 327  * hand using netdev_queue_dump_done(). */
 328 #define NETDEV_QUEUE_FOR_EACH(QUEUE_ID, DETAILS, DUMP, NETDEV)  \
 329     for (netdev_queue_dump_start(DUMP, NETDEV);                 \
 330          (netdev_queue_dump_next(DUMP, QUEUE_ID, DETAILS)       \
 331           ? true                                                \
 332           : (netdev_queue_dump_done(DUMP), false));             \
 333         )
 334
 335 typedef void netdev_dump_queue_stats_cb(unsigned int queue_id,
 336                                         struct netdev_queue_stats *,
 337                                         void *aux);
 338 int netdev_dump_queue_stats(const struct netdev *,
 339                             netdev_dump_queue_stats_cb *, void *aux);
 340
 341 enum { NETDEV_MAX_BURST = 32 }; /* Maximum number packets in a batch. */
 342 extern struct seq *tnl_conf_seq;
 343
 344 #ifdef  __cplusplus
 345 }
 346 #endif
 347
 348 #endif /* netdev.h */