lib/ofp-actions.h

   1 /*
   2  * Copyright (c) 2012 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 OFP_ACTIONS_H
  18 #define OFP_ACTIONS_H 1
  19
  20 #include <stdint.h>
  21 #include "meta-flow.h"
  22 #include "ofp-errors.h"
  23 #include "ofp-util.h"
  24 #include "openflow/openflow.h"
  25 #include "openflow/nicira-ext.h"
  26 #include "openvswitch/types.h"
  27
  28 /* List of OVS abstracted actions.
  29  *
  30  * This macro is used directly only internally by this header, but the list is
  31  * still of interest to developers.
  32  *
  33  * Each DEFINE_OFPACT invocation has the following parameters:
  34  *
  35  * 1. <ENUM>, used below in the enum definition of OFPACT_<ENUM>, and
  36  *    elsewhere.
  37  *
  38  * 2. <STRUCT> corresponding to a structure "struct <STRUCT>", that must be
  39  *    defined below.  This structure must be an abstract definition of the
  40  *    action.  Its first member must have type "struct ofpact" and name
  41  *    "ofpact".  It may be fixed length or end with a flexible array member
  42  *    (e.g. "int member[];").
  43  *
  44  * 3. <MEMBER>, which has one of two possible values:
  45  *
  46  *        - If "struct <STRUCT>" is fixed-length, it must be "ofpact".
  47  *
  48  *        - If "struct <STRUCT>" is variable-length, it must be the name of the
  49  *          flexible array member.
  50  */
  51 #define OFPACTS                                                     \
  52     /* Output. */                                                   \
  53     DEFINE_OFPACT(OUTPUT,          ofpact_output,        ofpact)    \
  54     DEFINE_OFPACT(CONTROLLER,      ofpact_controller,    ofpact)    \
  55     DEFINE_OFPACT(ENQUEUE,         ofpact_enqueue,       ofpact)    \
  56     DEFINE_OFPACT(OUTPUT_REG,      ofpact_output_reg,    ofpact)    \
  57     DEFINE_OFPACT(BUNDLE,          ofpact_bundle,        slaves)    \
  58                                                                     \
  59     /* Header changes. */                                           \
  60     DEFINE_OFPACT(SET_VLAN_VID,    ofpact_vlan_vid,      ofpact)    \
  61     DEFINE_OFPACT(SET_VLAN_PCP,    ofpact_vlan_pcp,      ofpact)    \
  62     DEFINE_OFPACT(STRIP_VLAN,      ofpact_null,          ofpact)    \
  63     DEFINE_OFPACT(SET_ETH_SRC,     ofpact_mac,           ofpact)    \
  64     DEFINE_OFPACT(SET_ETH_DST,     ofpact_mac,           ofpact)    \
  65     DEFINE_OFPACT(SET_IPV4_SRC,    ofpact_ipv4,          ofpact)    \
  66     DEFINE_OFPACT(SET_IPV4_DST,    ofpact_ipv4,          ofpact)    \
  67     DEFINE_OFPACT(SET_IPV4_DSCP,   ofpact_dscp,          ofpact)    \
  68     DEFINE_OFPACT(SET_L4_SRC_PORT, ofpact_l4_port,       ofpact)    \
  69     DEFINE_OFPACT(SET_L4_DST_PORT, ofpact_l4_port,       ofpact)    \
  70     DEFINE_OFPACT(REG_MOVE,        ofpact_reg_move,      ofpact)    \
  71     DEFINE_OFPACT(REG_LOAD,        ofpact_reg_load,      ofpact)    \
  72     DEFINE_OFPACT(DEC_TTL,         ofpact_cnt_ids,       cnt_ids)   \
  73                                                                     \
  74     /* Metadata. */                                                 \
  75     DEFINE_OFPACT(SET_TUNNEL,      ofpact_tunnel,        ofpact)    \
  76     DEFINE_OFPACT(SET_QUEUE,       ofpact_queue,         ofpact)    \
  77     DEFINE_OFPACT(POP_QUEUE,       ofpact_null,          ofpact)    \
  78     DEFINE_OFPACT(FIN_TIMEOUT,     ofpact_fin_timeout,   ofpact)    \
  79                                                                     \
  80     /* Flow table interaction. */                                   \
  81     DEFINE_OFPACT(RESUBMIT,        ofpact_resubmit,      ofpact)    \
  82     DEFINE_OFPACT(LEARN,           ofpact_learn,         specs)     \
  83                                                                     \
  84     /* Arithmetic. */                                               \
  85     DEFINE_OFPACT(MULTIPATH,       ofpact_multipath,     ofpact)    \
  86     DEFINE_OFPACT(AUTOPATH,        ofpact_autopath,      ofpact)    \
  87                                                                     \
  88     /* Other. */                                                    \
  89     DEFINE_OFPACT(NOTE,            ofpact_note,          data)      \
  90     DEFINE_OFPACT(EXIT,            ofpact_null,          ofpact)
  91
  92 /* enum ofpact_type, with a member OFPACT_<ENUM> for each action. */
  93 enum OVS_PACKED_ENUM ofpact_type {
  94 #define DEFINE_OFPACT(ENUM, STRUCT, MEMBER) OFPACT_##ENUM,
  95     OFPACTS
  96 #undef DEFINE_OFPACT
  97 };
  98
  99 /* N_OFPACTS, the number of values of "enum ofpact_type". */
 100 enum {
 101     N_OFPACTS =
 102 #define DEFINE_OFPACT(ENUM, STRUCT, MEMBER) + 1
 103     OFPACTS
 104 #undef DEFINE_OFPACT
 105 };
 106
 107 /* Header for an action.
 108  *
 109  * Each action is a structure "struct ofpact_*" that begins with "struct
 110  * ofpact", usually followed by other data that describes the action.  Actions
 111  * are padded out to a multiple of OFPACT_ALIGNTO bytes in length. */
 112 struct ofpact {
 113     enum ofpact_type type;      /* OFPACT_*. */
 114     enum ofputil_action_code compat; /* Original type when added, if any. */
 115     uint16_t len;               /* Length of the action, in bytes, including
 116                                  * struct ofpact, excluding padding. */
 117 };
 118
 119 #ifdef __GNUC__
 120 /* Make sure that OVS_PACKED_ENUM really worked. */
 121 BUILD_ASSERT_DECL(sizeof(struct ofpact) == 4);
 122 #endif
 123
 124 /* Alignment. */
 125 #define OFPACT_ALIGNTO 8
 126 #define OFPACT_ALIGN(SIZE) ROUND_UP(SIZE, OFPACT_ALIGNTO)
 127
 128 static inline struct ofpact *
 129 ofpact_next(const struct ofpact *ofpact)
 130 {
 131     return (void *) ((uint8_t *) ofpact + OFPACT_ALIGN(ofpact->len));
 132 }
 133
 134 static inline struct ofpact *
 135 ofpact_end(const struct ofpact *ofpacts, size_t ofpacts_len)
 136 {
 137     return (void *) ((uint8_t *) ofpacts + ofpacts_len);
 138 }
 139
 140 /* Assigns POS to each ofpact, in turn, in the OFPACTS_LEN bytes of ofpacts
 141  * starting at OFPACTS. */
 142 #define OFPACT_FOR_EACH(POS, OFPACTS, OFPACTS_LEN)                      \
 143     for ((POS) = (OFPACTS); (POS) < ofpact_end(OFPACTS, OFPACTS_LEN);  \
 144          (POS) = ofpact_next(POS))
 145 \f
 146 /* Action structure for each OFPACT_*. */
 147
 148 /* OFPACT_STRIP_VLAN, OFPACT_POP_QUEUE, OFPACT_EXIT.
 149  *
 150  * Used for OFPAT10_STRIP_VLAN, NXAST_DEC_TTL, NXAST_POP_QUEUE, NXAST_EXIT.
 151  *
 152  * Action structure for actions that do not have any extra data beyond the
 153  * action type. */
 154 struct ofpact_null {
 155     struct ofpact ofpact;
 156 };
 157
 158 /* OFPACT_OUTPUT.
 159  *
 160  * Used for OFPAT10_OUTPUT. */
 161 struct ofpact_output {
 162     struct ofpact ofpact;
 163     uint16_t port;              /* Output port. */
 164     uint16_t max_len;           /* Max send len, for port OFPP_CONTROLLER. */
 165 };
 166
 167 /* OFPACT_CONTROLLER.
 168  *
 169  * Used for NXAST_CONTROLLER. */
 170 struct ofpact_controller {
 171     struct ofpact ofpact;
 172     uint16_t max_len;           /* Maximum length to send to controller. */
 173     uint16_t controller_id;     /* Controller ID to send packet-in. */
 174     enum ofp_packet_in_reason reason; /* Reason to put in packet-in. */
 175 };
 176
 177 /* OFPACT_ENQUEUE.
 178  *
 179  * Used for OFPAT10_ENQUEUE. */
 180 struct ofpact_enqueue {
 181     struct ofpact ofpact;
 182     uint16_t port;
 183     uint32_t queue;
 184 };
 185
 186 /* OFPACT_OUTPUT_REG.
 187  *
 188  * Used for NXAST_OUTPUT_REG. */
 189 struct ofpact_output_reg {
 190     struct ofpact ofpact;
 191     struct mf_subfield src;
 192     uint16_t max_len;
 193 };
 194
 195 /* OFPACT_BUNDLE.
 196  *
 197  * Used for NXAST_BUNDLE. */
 198 struct ofpact_bundle {
 199     struct ofpact ofpact;
 200
 201     /* Slave choice algorithm to apply to hash value. */
 202     enum nx_bd_algorithm algorithm;
 203
 204     /* What fields to hash and how. */
 205     enum nx_hash_fields fields;
 206     uint16_t basis;             /* Universal hash parameter. */
 207
 208     struct mf_subfield dst;
 209
 210     /* Slaves for output. */
 211     unsigned int n_slaves;
 212     uint16_t slaves[];
 213 };
 214
 215 /* OFPACT_SET_VLAN_VID.
 216  *
 217  * Used for OFPAT10_SET_VLAN_VID. */
 218 struct ofpact_vlan_vid {
 219     struct ofpact ofpact;
 220     uint16_t vlan_vid;          /* VLAN VID in low 12 bits, 0 in other bits. */
 221 };
 222
 223 /* OFPACT_SET_VLAN_PCP.
 224  *
 225  * Used for OFPAT10_SET_VLAN_PCP. */
 226 struct ofpact_vlan_pcp {
 227     struct ofpact ofpact;
 228     uint8_t vlan_pcp;           /* VLAN PCP in low 3 bits, 0 in other bits. */
 229 };
 230
 231 /* OFPACT_SET_ETH_SRC, OFPACT_SET_ETH_DST.
 232  *
 233  * Used for OFPAT10_SET_DL_SRC, OFPAT10_SET_DL_DST. */
 234 struct ofpact_mac {
 235     struct ofpact ofpact;
 236     uint8_t mac[ETH_ADDR_LEN];
 237 };
 238
 239 /* OFPACT_SET_IPV4_SRC, OFPACT_SET_IPV4_DST.
 240  *
 241  * Used for OFPAT10_SET_NW_SRC, OFPAT10_SET_NW_DST. */
 242 struct ofpact_ipv4 {
 243     struct ofpact ofpact;
 244     ovs_be32 ipv4;
 245 };
 246
 247 /* OFPACT_SET_IPV4_DSCP.
 248  *
 249  * Used for OFPAT10_SET_NW_TOS. */
 250 struct ofpact_dscp {
 251     struct ofpact ofpact;
 252     uint8_t dscp;               /* DSCP in high 6 bits, rest ignored. */
 253 };
 254
 255 /* OFPACT_SET_L4_SRC_PORT, OFPACT_SET_L4_DST_PORT.
 256  *
 257  * Used for OFPAT10_SET_TP_SRC, OFPAT10_SET_TP_DST. */
 258 struct ofpact_l4_port {
 259     struct ofpact ofpact;
 260     uint16_t port;              /* TCP or UDP port number. */
 261 };
 262
 263 /* OFPACT_REG_MOVE.
 264  *
 265  * Used for NXAST_REG_MOVE. */
 266 struct ofpact_reg_move {
 267     struct ofpact ofpact;
 268     struct mf_subfield src;
 269     struct mf_subfield dst;
 270 };
 271
 272 /* OFPACT_REG_LOAD.
 273  *
 274  * Used for NXAST_REG_LOAD, OFPAT12_SET_FIELD. */
 275 struct ofpact_reg_load {
 276     struct ofpact ofpact;
 277     struct mf_subfield dst;
 278     union mf_subvalue subvalue; /* Least-significant bits are used. */
 279 };
 280
 281 /* OFPACT_SET_TUNNEL.
 282  *
 283  * Used for NXAST_SET_TUNNEL, NXAST_SET_TUNNEL64. */
 284 struct ofpact_tunnel {
 285     struct ofpact ofpact;
 286     uint64_t tun_id;
 287 };
 288
 289 /* OFPACT_SET_QUEUE.
 290  *
 291  * Used for NXAST_SET_QUEUE. */
 292 struct ofpact_queue {
 293     struct ofpact ofpact;
 294     uint32_t queue_id;
 295 };
 296
 297 /* OFPACT_FIN_TIMEOUT.
 298  *
 299  * Used for NXAST_FIN_TIMEOUT. */
 300 struct ofpact_fin_timeout {
 301     struct ofpact ofpact;
 302     uint16_t fin_idle_timeout;
 303     uint16_t fin_hard_timeout;
 304 };
 305
 306 /* OFPACT_RESUBMIT.
 307  *
 308  * Used for NXAST_RESUBMIT, NXAST_RESUBMIT_TABLE. */
 309 struct ofpact_resubmit {
 310     struct ofpact ofpact;
 311     uint16_t in_port;
 312     uint8_t table_id;
 313 };
 314
 315 /* Part of struct ofpact_learn, below. */
 316 struct ofpact_learn_spec {
 317     int n_bits;
 318
 319     int src_type;
 320     struct mf_subfield src;
 321     union mf_subvalue src_imm;
 322
 323     int dst_type;
 324     struct mf_subfield dst;
 325 };
 326
 327 /* OFPACT_LEARN.
 328  *
 329  * Used for NXAST_LEARN. */
 330 struct ofpact_learn {
 331     struct ofpact ofpact;
 332
 333     uint16_t idle_timeout;      /* Idle time before discarding (seconds). */
 334     uint16_t hard_timeout;      /* Max time before discarding (seconds). */
 335     uint16_t priority;          /* Priority level of flow entry. */
 336     uint64_t cookie;            /* Cookie for new flow. */
 337     uint16_t flags;             /* Either 0 or OFPFF_SEND_FLOW_REM. */
 338     uint8_t table_id;           /* Table to insert flow entry. */
 339     uint16_t fin_idle_timeout;  /* Idle timeout after FIN, if nonzero. */
 340     uint16_t fin_hard_timeout;  /* Hard timeout after FIN, if nonzero. */
 341
 342     unsigned int n_specs;
 343     struct ofpact_learn_spec specs[];
 344 };
 345
 346 /* OFPACT_MULTIPATH.
 347  *
 348  * Used for NXAST_MULTIPATH. */
 349 struct ofpact_multipath {
 350     struct ofpact ofpact;
 351
 352     /* What fields to hash and how. */
 353     enum nx_hash_fields fields;
 354     uint16_t basis;             /* Universal hash parameter. */
 355
 356     /* Multipath link choice algorithm to apply to hash value. */
 357     enum nx_mp_algorithm algorithm;
 358     uint16_t max_link;          /* Number of output links, minus 1. */
 359     uint32_t arg;               /* Algorithm-specific argument. */
 360
 361     /* Where to store the result. */
 362     struct mf_subfield dst;
 363 };
 364
 365 /* OFPACT_AUTOPATH.
 366  *
 367  * Used for NXAST_AUTOPATH. */
 368 struct ofpact_autopath {
 369     struct ofpact ofpact;
 370     struct mf_subfield dst;
 371     uint32_t port;
 372 };
 373
 374 /* OFPACT_NOTE.
 375  *
 376  * Used for NXAST_NOTE. */
 377 struct ofpact_note {
 378     struct ofpact ofpact;
 379     size_t length;
 380     uint8_t data[];
 381 };
 382
 383 /* OFPACT_DEC_TTL.
 384  *
 385  * Used for NXAST_DEC_TTL and NXAST_DEC_TTL_CNT_IDS. */
 386 struct ofpact_cnt_ids {
 387     struct ofpact ofpact;
 388
 389     /* Controller ids. */
 390     unsigned int n_controllers;
 391     uint16_t cnt_ids[];
 392
 393 };
 394
 395 /* Converting OpenFlow to ofpacts. */
 396 enum ofperr ofpacts_pull_openflow10(struct ofpbuf *openflow,
 397                                     unsigned int actions_len,
 398                                     struct ofpbuf *ofpacts);
 399 enum ofperr ofpacts_pull_openflow11_actions(struct ofpbuf *openflow,
 400                                             unsigned int actions_len,
 401                                             struct ofpbuf *ofpacts);
 402 enum ofperr ofpacts_pull_openflow11_instructions(struct ofpbuf *openflow,
 403                                                  unsigned int instructions_len,
 404                                                  struct ofpbuf *ofpacts);
 405 enum ofperr ofpacts_check(const struct ofpact[], size_t ofpacts_len,
 406                           const struct flow *, int max_ports);
 407
 408 /* Converting ofpacts to OpenFlow. */
 409 void ofpacts_put_openflow10(const struct ofpact[], size_t ofpacts_len,
 410                             struct ofpbuf *openflow);
 411 size_t ofpacts_put_openflow11_actions(const struct ofpact[], size_t ofpacts_len,
 412                                       struct ofpbuf *openflow);
 413 void ofpacts_put_openflow11_instructions(const struct ofpact[],
 414                                          size_t ofpacts_len,
 415                                          struct ofpbuf *openflow);
 416
 417 /* Working with ofpacts. */
 418 bool ofpacts_output_to_port(const struct ofpact[], size_t ofpacts_len,
 419                             uint16_t port);
 420 bool ofpacts_equal(const struct ofpact a[], size_t a_len,
 421                    const struct ofpact b[], size_t b_len);
 422
 423 /* Formatting ofpacts.
 424  *
 425  * (For parsing ofpacts, see ofp-parse.h.) */
 426 void ofpacts_format(const struct ofpact[], size_t ofpacts_len, struct ds *);
 427
 428 /* Internal use by the helpers below. */
 429 void ofpact_init(struct ofpact *, enum ofpact_type, size_t len);
 430 void *ofpact_put(struct ofpbuf *, enum ofpact_type, size_t len);
 431
 432 /* For each OFPACT_<ENUM> with a corresponding struct <STRUCT>, this defines
 433  * the following commonly useful functions:
 434  *
 435  *   struct <STRUCT> *ofpact_put_<ENUM>(struct ofpbuf *ofpacts);
 436  *
 437  *     Appends a new 'ofpact', of length OFPACT_<ENUM>_RAW_SIZE, to 'ofpacts',
 438  *     initializes it with ofpact_init_<ENUM>(), and returns it.  Also sets
 439  *     'ofpacts->l2' to the returned action.
 440  *
 441  *     After using this function to add a variable-length action, add the
 442  *     elements of the flexible array (e.g. with ofpbuf_put()), then use
 443  *     ofpact_update_len() to update the length embedded into the action.
 444  *     (Keep in mind the need to refresh the structure from 'ofpacts->l2' after
 445  *     adding data to 'ofpacts'.)
 446  *
 447  *   struct <STRUCT> *ofpact_get_<ENUM>(const struct ofpact *ofpact);
 448  *
 449  *     Returns 'ofpact' cast to "struct <STRUCT> *".  'ofpact->type' must be
 450  *     OFPACT_<ENUM>.
 451  *
 452  * as well as the following more rarely useful definitions:
 453  *
 454  *   void ofpact_init_<ENUM>(struct <STRUCT> *ofpact);
 455  *
 456  *     Initializes the parts of 'ofpact' that identify it as having type
 457  *     OFPACT_<ENUM> and length OFPACT_<ENUM>_RAW_SIZE and zeros the rest.
 458  *
 459  *   <ENUM>_RAW_SIZE
 460  *
 461  *     The size of the action structure.  For a fixed-length action, this is
 462  *     sizeof(struct <STRUCT>).  For a variable-length action, this is the
 463  *     offset to the variable-length part.
 464  *
 465  *   <ENUM>_SIZE
 466  *
 467  *     An integer constant, the value of OFPACT_<ENUM>_RAW_SIZE rounded up to a
 468  *     multiple of OFPACT_ALIGNTO.
 469  */
 470 #define DEFINE_OFPACT(ENUM, STRUCT, MEMBER)                             \
 471     BUILD_ASSERT_DECL(offsetof(struct STRUCT, ofpact) == 0);            \
 472                                                                         \
 473     enum { OFPACT_##ENUM##_RAW_SIZE                                     \
 474            = (offsetof(struct STRUCT, MEMBER)                           \
 475               ? offsetof(struct STRUCT, MEMBER)                         \
 476               : sizeof(struct STRUCT)) };                               \
 477                                                                         \
 478     enum { OFPACT_##ENUM##_SIZE                                         \
 479            = ROUND_UP(OFPACT_##ENUM##_RAW_SIZE, OFPACT_ALIGNTO) };      \
 480                                                                         \
 481     static inline struct STRUCT *                                       \
 482     ofpact_get_##ENUM(const struct ofpact *ofpact)                      \
 483     {                                                                   \
 484         assert(ofpact->type == OFPACT_##ENUM);                          \
 485         return (struct STRUCT *) ofpact;                                \
 486     }                                                                   \
 487                                                                         \
 488     static inline struct STRUCT *                                       \
 489     ofpact_put_##ENUM(struct ofpbuf *ofpacts)                           \
 490     {                                                                   \
 491         return ofpact_put(ofpacts, OFPACT_##ENUM,                       \
 492                           OFPACT_##ENUM##_RAW_SIZE);                    \
 493     }                                                                   \
 494                                                                         \
 495     static inline void                                                  \
 496     ofpact_init_##ENUM(struct STRUCT *ofpact)                           \
 497     {                                                                   \
 498         ofpact_init(&ofpact->ofpact, OFPACT_##ENUM,                     \
 499                     OFPACT_##ENUM##_RAW_SIZE);                          \
 500     }
 501 OFPACTS
 502 #undef DEFINE_OFPACT
 503
 504 /* Functions to use after adding ofpacts to a buffer. */
 505 void ofpact_update_len(struct ofpbuf *, struct ofpact *);
 506 void ofpact_pad(struct ofpbuf *);
 507
 508 /* OpenFlow 1.1 instructions.
 509  * The order is sorted in execution order. Not in the value of OFPIT11_xxx.
 510  * It is enforced on parser from text string.
 511  */
 512 #define OVS_INSTRUCTIONS                                    \
 513     DEFINE_INST(OFPIT11_APPLY_ACTIONS,                      \
 514                 ofp11_instruction_actions,        true,     \
 515                 "apply_actions")                            \
 516                                                             \
 517     DEFINE_INST(OFPIT11_CLEAR_ACTIONS,                      \
 518                 ofp11_instruction,                false,    \
 519                 "clear_actions")                            \
 520                                                             \
 521     DEFINE_INST(OFPIT11_WRITE_ACTIONS,                      \
 522                 ofp11_instruction_actions,        true,     \
 523                 "write_actions")                            \
 524                                                             \
 525     DEFINE_INST(OFPIT11_WRITE_METADATA,                     \
 526                 ofp11_instruction_write_metadata, false,    \
 527                 "write_metadata")                           \
 528                                                             \
 529     DEFINE_INST(OFPIT11_GOTO_TABLE,                         \
 530                 ofp11_instruction_goto_table,     false,    \
 531                 "goto_table")
 532
 533 enum ovs_instruction_type {
 534 #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) OVSINST_##ENUM,
 535     OVS_INSTRUCTIONS
 536 #undef DEFINE_INST
 537 };
 538
 539 enum {
 540 #define DEFINE_INST(ENUM, STRUCT, EXTENSIBLE, NAME) + 1
 541     N_OVS_INSTRUCTIONS = OVS_INSTRUCTIONS
 542 #undef DEFINE_INST
 543 };
 544
 545 const char *ofpact_instruction_name_from_type(enum ovs_instruction_type type);
 546 int ofpact_instruction_type_from_name(const char *name);
 547
 548 #endif /* ofp-actions.h */