2 * Copyright (c) 2009, 2010, 2011, 2012 Nicira, Inc.
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:
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
17 #ifndef OFPROTO_OFPROTO_PROVIDER_H
18 #define OFPROTO_OFPROTO_PROVIDER_H 1
20 /* Definitions for use within ofproto. */
22 #include "ofproto/ofproto.h"
24 #include "classifier.h"
27 #include "ofp-errors.h"
34 struct ofputil_flow_mod;
37 /* An OpenFlow switch.
39 * With few exceptions, ofproto implementations may look at these fields but
40 * should not modify them. */
42 struct hmap_node hmap_node; /* In global 'all_ofprotos' hmap. */
43 const struct ofproto_class *ofproto_class;
44 char *type; /* Datapath type. */
45 char *name; /* Datapath name. */
48 uint64_t fallback_dpid; /* Datapath ID if no better choice found. */
49 uint64_t datapath_id; /* Datapath ID. */
50 unsigned flow_eviction_threshold; /* Threshold at which to begin flow
51 * table eviction. Only affects the
52 * ofproto-dpif implementation */
53 bool forward_bpdu; /* Option to allow forwarding of BPDU frames
54 * when NORMAL action is invoked. */
55 char *mfr_desc; /* Manufacturer. */
56 char *hw_desc; /* Hardware. */
57 char *sw_desc; /* Software version. */
58 char *serial_desc; /* Serial number. */
59 char *dp_desc; /* Datapath description. */
60 enum ofp_config_flags frag_handling; /* One of OFPC_*. */
63 struct hmap ports; /* Contains "struct ofport"s. */
64 struct shash port_by_name;
65 uint16_t max_ports; /* Max possible OpenFlow port num, plus one. */
68 struct oftable *tables;
71 /* OpenFlow connections. */
72 struct connmgr *connmgr;
74 /* Flow table operation tracking. */
75 int state; /* Internal state. */
76 struct list pending; /* List of "struct ofopgroup"s. */
77 unsigned int n_pending; /* list_size(&pending). */
78 struct hmap deletions; /* All OFOPERATION_DELETE "ofoperation"s. */
80 /* Flow table operation logging. */
81 int n_add, n_delete, n_modify; /* Number of unreported ops of each kind. */
82 long long int first_op, last_op; /* Range of times for unreported ops. */
83 long long int next_op_report; /* Time to report ops, or LLONG_MAX. */
84 long long int op_backoff; /* Earliest time to report ops again. */
86 /* Linux VLAN device support (e.g. "eth0.10" for VLAN 10.)
88 * This is deprecated. It is only for compatibility with broken device
89 * drivers in old versions of Linux that do not properly support VLANs when
90 * VLAN devices are not used. When broken device drivers are no longer in
91 * widespread use, we will delete these interfaces. */
92 unsigned long int *vlan_bitmap; /* 4096-bit bitmap of in-use VLANs. */
93 bool vlans_changed; /* True if new VLANs are in use. */
94 int min_mtu; /* Current MTU of non-internal ports. */
97 void ofproto_init_tables(struct ofproto *, int n_tables);
98 void ofproto_init_max_ports(struct ofproto *, uint16_t max_ports);
100 struct ofproto *ofproto_lookup(const char *name);
101 struct ofport *ofproto_get_port(const struct ofproto *, uint16_t ofp_port);
103 /* An OpenFlow port within a "struct ofproto".
105 * With few exceptions, ofproto implementations may look at these fields but
106 * should not modify them. */
108 struct hmap_node hmap_node; /* In struct ofproto's "ports" hmap. */
109 struct ofproto *ofproto; /* The ofproto that contains this port. */
110 struct netdev *netdev;
111 struct ofputil_phy_port pp;
112 uint16_t ofp_port; /* OpenFlow port number. */
113 unsigned int change_seq;
117 void ofproto_port_set_state(struct ofport *, enum ofputil_port_state);
120 OFTABLE_HIDDEN = 1 << 0, /* Hide from most OpenFlow operations. */
121 OFTABLE_READONLY = 1 << 1 /* Don't allow OpenFlow to change this table. */
124 /* A flow table within a "struct ofproto". */
126 enum oftable_flags flags;
127 struct classifier cls; /* Contains "struct rule"s. */
128 char *name; /* Table name exposed via OpenFlow, or NULL. */
130 /* Maximum number of flows or UINT_MAX if there is no limit besides any
131 * limit imposed by resource limitations. */
132 unsigned int max_flows;
134 /* These members determine the handling of an attempt to add a flow that
135 * would cause the table to have more than 'max_flows' flows.
137 * If 'eviction_fields' is NULL, overflows will be rejected with an error.
139 * If 'eviction_fields' is nonnull (regardless of whether n_eviction_fields
140 * is nonzero), an overflow will cause a flow to be removed. The flow to
141 * be removed is chosen to give fairness among groups distinguished by
142 * different values for the subfields within 'groups'. */
143 struct mf_subfield *eviction_fields;
144 size_t n_eviction_fields;
148 * When a flow is added that would cause the table to have more than
149 * 'max_flows' flows, and 'eviction_fields' is nonnull, these groups are
150 * used to decide which rule to evict: the rule is chosen from the eviction
151 * group that contains the greatest number of rules.*/
152 uint32_t eviction_group_id_basis;
153 struct hmap eviction_groups_by_id;
154 struct heap eviction_groups_by_size;
157 /* Assigns TABLE to each oftable, in turn, in OFPROTO.
159 * All parameters are evaluated multiple times. */
160 #define OFPROTO_FOR_EACH_TABLE(TABLE, OFPROTO) \
161 for ((TABLE) = (OFPROTO)->tables; \
162 (TABLE) < &(OFPROTO)->tables[(OFPROTO)->n_tables]; \
165 /* An OpenFlow flow within a "struct ofproto".
167 * With few exceptions, ofproto implementations may look at these fields but
168 * should not modify them. */
170 struct list ofproto_node; /* Owned by ofproto base code. */
171 struct ofproto *ofproto; /* The ofproto that contains this rule. */
172 struct cls_rule cr; /* In owning ofproto's classifier. */
174 struct ofoperation *pending; /* Operation now in progress, if nonnull. */
176 ovs_be64 flow_cookie; /* Controller-issued identifier. */
178 long long int created; /* Creation time. */
179 long long int modified; /* Time of last modification. */
180 long long int used; /* Last use; time created if never used. */
181 uint16_t hard_timeout; /* In seconds from ->modified. */
182 uint16_t idle_timeout; /* In seconds from ->used. */
183 uint8_t table_id; /* Index in ofproto's 'tables' array. */
184 bool send_flow_removed; /* Send a flow removed message? */
186 /* Eviction groups. */
187 bool evictable; /* If false, prevents eviction. */
188 struct heap_node evg_node; /* In eviction_group's "rules" heap. */
189 struct eviction_group *eviction_group; /* NULL if not in any group. */
191 struct ofpact *ofpacts; /* Sequence of "struct ofpacts". */
192 unsigned int ofpacts_len; /* Size of 'ofpacts', in bytes. */
195 enum nx_flow_monitor_flags monitor_flags;
196 uint64_t add_seqno; /* Sequence number when added. */
197 uint64_t modify_seqno; /* Sequence number when changed. */
200 static inline struct rule *
201 rule_from_cls_rule(const struct cls_rule *cls_rule)
203 return cls_rule ? CONTAINER_OF(cls_rule, struct rule, cr) : NULL;
206 void ofproto_rule_update_used(struct rule *, long long int used);
207 void ofproto_rule_expire(struct rule *, uint8_t reason);
208 void ofproto_rule_destroy(struct rule *);
210 bool ofproto_rule_has_out_port(const struct rule *, uint16_t out_port);
212 void ofoperation_complete(struct ofoperation *, enum ofperr);
213 struct rule *ofoperation_get_victim(struct ofoperation *);
215 bool ofoperation_has_out_port(const struct ofoperation *, uint16_t out_port);
217 bool ofproto_rule_is_hidden(const struct rule *);
219 /* ofproto class structure, to be defined by each ofproto implementation.
225 * These functions work primarily with three different kinds of data
228 * - "struct ofproto", which represents an OpenFlow switch.
230 * - "struct ofport", which represents a port within an ofproto.
232 * - "struct rule", which represents an OpenFlow flow within an ofproto.
234 * Each of these data structures contains all of the implementation-independent
235 * generic state for the respective concept, called the "base" state. None of
236 * them contains any extra space for ofproto implementations to use. Instead,
237 * each implementation is expected to declare its own data structure that
238 * contains an instance of the generic data structure plus additional
239 * implementation-specific members, called the "derived" state. The
240 * implementation can use casts or (preferably) the CONTAINER_OF macro to
241 * obtain access to derived state given only a pointer to the embedded generic
248 * Four stylized functions accompany each of these data structures:
250 * "alloc" "construct" "destruct" "dealloc"
251 * ------------ ---------------- --------------- --------------
252 * ofproto ->alloc ->construct ->destruct ->dealloc
253 * ofport ->port_alloc ->port_construct ->port_destruct ->port_dealloc
254 * rule ->rule_alloc ->rule_construct ->rule_destruct ->rule_dealloc
256 * Any instance of a given data structure goes through the following life
259 * 1. The client calls the "alloc" function to obtain raw memory. If "alloc"
260 * fails, skip all the other steps.
262 * 2. The client initializes all of the data structure's base state. If this
263 * fails, skip to step 7.
265 * 3. The client calls the "construct" function. The implementation
266 * initializes derived state. It may refer to the already-initialized
267 * base state. If "construct" fails, skip to step 6.
269 * 4. The data structure is now initialized and in use.
271 * 5. When the data structure is no longer needed, the client calls the
272 * "destruct" function. The implementation uninitializes derived state.
273 * The base state has not been uninitialized yet, so the implementation
274 * may still refer to it.
276 * 6. The client uninitializes all of the data structure's base state.
278 * 7. The client calls the "dealloc" to free the raw memory. The
279 * implementation must not refer to base or derived state in the data
280 * structure, because it has already been uninitialized.
282 * Each "alloc" function allocates and returns a new instance of the respective
283 * data structure. The "alloc" function is not given any information about the
284 * use of the new data structure, so it cannot perform much initialization.
285 * Its purpose is just to ensure that the new data structure has enough room
286 * for base and derived state. It may return a null pointer if memory is not
287 * available, in which case none of the other functions is called.
289 * Each "construct" function initializes derived state in its respective data
290 * structure. When "construct" is called, all of the base state has already
291 * been initialized, so the "construct" function may refer to it. The
292 * "construct" function is allowed to fail, in which case the client calls the
293 * "dealloc" function (but not the "destruct" function).
295 * Each "destruct" function uninitializes and frees derived state in its
296 * respective data structure. When "destruct" is called, the base state has
297 * not yet been uninitialized, so the "destruct" function may refer to it. The
298 * "destruct" function is not allowed to fail.
300 * Each "dealloc" function frees raw memory that was allocated by the the
301 * "alloc" function. The memory's base and derived members might not have ever
302 * been initialized (but if "construct" returned successfully, then it has been
303 * "destruct"ed already). The "dealloc" function is not allowed to fail.
309 * Most of these functions return 0 if they are successful or a positive error
310 * code on failure. Depending on the function, valid error codes are either
311 * errno values or OFPERR_* OpenFlow error codes.
313 * Most of these functions are expected to execute synchronously, that is, to
314 * block as necessary to obtain a result. Thus, these functions may return
315 * EAGAIN (or EWOULDBLOCK or EINPROGRESS) only where the function descriptions
316 * explicitly say those errors are a possibility. We may relax this
317 * requirement in the future if and when we encounter performance problems. */
318 struct ofproto_class {
319 /* ## ----------------- ## */
320 /* ## Factory Functions ## */
321 /* ## ----------------- ## */
323 /* Initializes provider. The caller may pass in 'iface_hints',
324 * which contains an shash of "struct iface_hint" elements indexed
325 * by the interface's name. The provider may use these hints to
326 * describe the startup configuration in order to reinitialize its
327 * state. The caller owns the provided data, so a provider must
328 * make copies of anything required. An ofproto provider must
329 * remove any existing state that is not described by the hint, and
330 * may choose to remove it all. */
331 void (*init)(const struct shash *iface_hints);
333 /* Enumerates the types of all support ofproto types into 'types'. The
334 * caller has already initialized 'types' and other ofproto classes might
335 * already have added names to it. */
336 void (*enumerate_types)(struct sset *types);
338 /* Enumerates the names of all existing datapath of the specified 'type'
339 * into 'names' 'all_dps'. The caller has already initialized 'names' as
342 * 'type' is one of the types enumerated by ->enumerate_types().
344 * Returns 0 if successful, otherwise a positive errno value.
346 int (*enumerate_names)(const char *type, struct sset *names);
348 /* Deletes the datapath with the specified 'type' and 'name'. The caller
349 * should have closed any open ofproto with this 'type' and 'name'; this
350 * function is allowed to fail if that is not the case.
352 * 'type' is one of the types enumerated by ->enumerate_types().
353 * 'name' is one of the names enumerated by ->enumerate_names() for 'type'.
355 * Returns 0 if successful, otherwise a positive errno value.
357 int (*del)(const char *type, const char *name);
359 /* ## --------------------------- ## */
360 /* ## Top-Level ofproto Functions ## */
361 /* ## --------------------------- ## */
363 /* Life-cycle functions for an "ofproto" (see "Life Cycle" above).
369 * ->construct() should not modify any base members of the ofproto. The
370 * client will initialize the ofproto's 'ports' and 'tables' members after
371 * construction is complete.
373 * When ->construct() is called, the client does not yet know how many flow
374 * tables the datapath supports, so ofproto->n_tables will be 0 and
375 * ofproto->tables will be NULL. ->construct() should call
376 * ofproto_init_tables() to allocate and initialize ofproto->n_tables and
377 * ofproto->tables. Each flow table will be initially empty, so
378 * ->construct() should delete flows from the underlying datapath, if
379 * necessary, rather than populating the tables.
381 * If the ofproto knows the maximum port number that the datapath can have,
382 * then it can call ofproto_init_max_ports(). If it does so, then the
383 * client will ensure that the actions it allows to be used through
384 * OpenFlow do not refer to ports above that maximum number.
386 * Only one ofproto instance needs to be supported for any given datapath.
387 * If a datapath is already open as part of one "ofproto", then another
388 * attempt to "construct" the same datapath as part of another ofproto is
389 * allowed to fail with an error.
391 * ->construct() returns 0 if successful, otherwise a positive errno
398 * If 'ofproto' has any pending asynchronous operations, ->destruct()
399 * must complete all of them by calling ofoperation_complete().
401 * ->destruct() must also destroy all remaining rules in the ofproto's
402 * tables, by passing each remaining rule to ofproto_rule_destroy(). The
403 * client will destroy the flow tables themselves after ->destruct()
406 struct ofproto *(*alloc)(void);
407 int (*construct)(struct ofproto *ofproto);
408 void (*destruct)(struct ofproto *ofproto);
409 void (*dealloc)(struct ofproto *ofproto);
411 /* Performs any periodic activity required by 'ofproto'. It should:
413 * - Call connmgr_send_packet_in() for each received packet that missed
414 * in the OpenFlow flow table or that had a OFPP_CONTROLLER output
417 * - Call ofproto_rule_expire() for each OpenFlow flow that has reached
418 * its hard_timeout or idle_timeout, to expire the flow.
420 * (But rules that are part of a pending operation, e.g. rules for
421 * which ->pending is true, may not expire.)
423 * Returns 0 if successful, otherwise a positive errno value. */
424 int (*run)(struct ofproto *ofproto);
426 /* Performs periodic activity required by 'ofproto' that needs to be done
427 * with the least possible latency.
429 * This is run multiple times per main loop. An ofproto provider may
430 * implement it or not, according to whether it provides a performance
431 * boost for that ofproto implementation. */
432 int (*run_fast)(struct ofproto *ofproto);
434 /* Causes the poll loop to wake up when 'ofproto''s 'run' function needs to
435 * be called, e.g. by calling the timer or fd waiting functions in
437 void (*wait)(struct ofproto *ofproto);
439 /* Adds some memory usage statistics for the implementation of 'ofproto'
440 * into 'usage', for use with memory_report().
442 * This function is optional. */
443 void (*get_memory_usage)(const struct ofproto *ofproto,
444 struct simap *usage);
446 /* Every "struct rule" in 'ofproto' is about to be deleted, one by one.
447 * This function may prepare for that, for example by clearing state in
448 * advance. It should *not* actually delete any "struct rule"s from
449 * 'ofproto', only prepare for it.
451 * This function is optional; it's really just for optimization in case
452 * it's cheaper to delete all the flows from your hardware in a single pass
453 * than to do it one by one. */
454 void (*flush)(struct ofproto *ofproto);
456 /* Helper for the OpenFlow OFPT_FEATURES_REQUEST request.
458 * The implementation should store true in '*arp_match_ip' if the switch
459 * supports matching IP addresses inside ARP requests and replies, false
462 * The implementation should store in '*actions' a bitmap of the supported
463 * OpenFlow actions. Vendor actions are not included in '*actions'. */
464 void (*get_features)(struct ofproto *ofproto,
466 enum ofputil_action_bitmap *actions);
468 /* Helper for the OpenFlow OFPST_TABLE statistics request.
470 * The 'ots' array contains 'ofproto->n_tables' elements. Each element is
473 * - 'table_id' to the array index.
475 * - 'name' to "table#" where # is the table ID.
477 * - 'match' and 'wildcards' to OFPXMT12_MASK.
479 * - 'write_actions' and 'apply_actions' to OFPAT12_OUTPUT.
481 * - 'write_setfields' and 'apply_setfields' to OFPXMT12_MASK.
483 * - 'metadata_match' and 'metadata_write' to UINT64_MAX.
485 * - 'instructions' to OFPIT11_ALL.
487 * - 'config' to OFPTC11_TABLE_MISS_MASK.
489 * - 'max_entries' to 1,000,000.
491 * - 'active_count' to the classifier_count() for the table.
493 * - 'lookup_count' and 'matched_count' to 0.
495 * The implementation should update any members in each element for which
496 * it has better values:
498 * - 'name' to a more meaningful name.
500 * - 'wildcards' to the set of wildcards actually supported by the table
501 * (if it doesn't support all OpenFlow wildcards).
503 * - 'instructions' to set the instructions actually supported by
506 * - 'write_actions' to set the write actions actually supported by
507 * the table (if it doesn't support all OpenFlow actions).
509 * - 'apply_actions' to set the apply actions actually supported by
510 * the table (if it doesn't support all OpenFlow actions).
512 * - 'write_setfields' to set the write setfields actually supported by
515 * - 'apply_setfields' to set the apply setfields actually supported by
518 * - 'max_entries' to the maximum number of flows actually supported by
521 * - 'lookup_count' to the number of packets looked up in this flow table
524 * - 'matched_count' to the number of packets looked up in this flow
525 * table so far that matched one of the flow entries.
527 * All of the members of struct ofp12_table_stats are in network byte
530 void (*get_tables)(struct ofproto *ofproto, struct ofp12_table_stats *ots);
532 /* ## ---------------- ## */
533 /* ## ofport Functions ## */
534 /* ## ---------------- ## */
536 /* Life-cycle functions for a "struct ofport" (see "Life Cycle" above).
538 * ->port_construct() should not modify any base members of the ofport.
540 * ofports are managed by the base ofproto code. The ofproto
541 * implementation should only create and destroy them in response to calls
542 * to these functions. The base ofproto code will create and destroy
543 * ofports in the following situations:
545 * - Just after the ->construct() function is called, the base ofproto
546 * iterates over all of the implementation's ports, using
547 * ->port_dump_start() and related functions, and constructs an ofport
548 * for each dumped port.
550 * - If ->port_poll() reports that a specific port has changed, then the
551 * base ofproto will query that port with ->port_query_by_name() and
552 * construct or destruct ofports as necessary to reflect the updated
555 * - If ->port_poll() returns ENOBUFS to report an unspecified port set
556 * change, then the base ofproto will iterate over all of the
557 * implementation's ports, in the same way as at ofproto
558 * initialization, and construct and destruct ofports to reflect all of
561 * ->port_construct() returns 0 if successful, otherwise a positive errno
564 struct ofport *(*port_alloc)(void);
565 int (*port_construct)(struct ofport *ofport);
566 void (*port_destruct)(struct ofport *ofport);
567 void (*port_dealloc)(struct ofport *ofport);
569 /* Called after 'ofport->netdev' is replaced by a new netdev object. If
570 * the ofproto implementation uses the ofport's netdev internally, then it
571 * should switch to using the new one. The old one has been closed.
573 * An ofproto implementation that doesn't need to do anything in this
574 * function may use a null pointer. */
575 void (*port_modified)(struct ofport *ofport);
577 /* Called after an OpenFlow request changes a port's configuration.
578 * 'ofport->pp.config' contains the new configuration. 'old_config'
579 * contains the previous configuration.
581 * The caller implements OFPUTIL_PC_PORT_DOWN using netdev functions to
582 * turn NETDEV_UP on and off, so this function doesn't have to do anything
583 * for that bit (and it won't be called if that is the only bit that
585 void (*port_reconfigured)(struct ofport *ofport,
586 enum ofputil_port_config old_config);
588 /* Looks up a port named 'devname' in 'ofproto'. On success, initializes
589 * '*port' appropriately.
591 * The caller owns the data in 'port' and must free it with
592 * ofproto_port_destroy() when it is no longer needed. */
593 int (*port_query_by_name)(const struct ofproto *ofproto,
594 const char *devname, struct ofproto_port *port);
596 /* Attempts to add 'netdev' as a port on 'ofproto'. If '*ofp_portp'
597 * is not OFPP_NONE, attempts to use that as the port's OpenFlow
600 * Returns 0 if successful, otherwise a positive errno value. If
601 * successful, sets '*ofp_portp' to the new port's port number.
603 * It doesn't matter whether the new port will be returned by a later call
604 * to ->port_poll(); the implementation may do whatever is more
606 int (*port_add)(struct ofproto *ofproto, struct netdev *netdev,
607 uint16_t *ofp_portp);
609 /* Deletes port number 'ofp_port' from the datapath for 'ofproto'. Returns
610 * 0 if successful, otherwise a positive errno value.
612 * It doesn't matter whether the new port will be returned by a later call
613 * to ->port_poll(); the implementation may do whatever is more
615 int (*port_del)(struct ofproto *ofproto, uint16_t ofp_port);
618 int (*port_get_stats)(const struct ofport *port,
619 struct netdev_stats *stats);
621 /* Port iteration functions.
623 * The client might not be entirely in control of the ports within an
624 * ofproto. Some hardware implementations, for example, might have a fixed
625 * set of ports in a datapath, and the Linux datapath allows the system
626 * administrator to externally add and remove ports with ovs-dpctl. For
627 * this reason, the client needs a way to iterate through all the ports
628 * that are actually in a datapath. These functions provide that
631 * The 'state' pointer provides the implementation a place to
632 * keep track of its position. Its format is opaque to the caller.
634 * The ofproto provider retains ownership of the data that it stores into
635 * ->port_dump_next()'s 'port' argument. The data must remain valid until
636 * at least the next call to ->port_dump_next() or ->port_dump_done() for
637 * 'state'. The caller will not modify or free it.
642 * ->port_dump_start() attempts to begin dumping the ports in 'ofproto'.
643 * On success, it should return 0 and initialize '*statep' with any data
644 * needed for iteration. On failure, returns a positive errno value, and
645 * the client will not call ->port_dump_next() or ->port_dump_done().
647 * ->port_dump_next() attempts to retrieve another port from 'ofproto' for
648 * 'state'. If there is another port, it should store the port's
649 * information into 'port' and return 0. It should return EOF if all ports
650 * have already been iterated. Otherwise, on error, it should return a
651 * positive errno value. This function will not be called again once it
652 * returns nonzero once for a given iteration (but the 'port_dump_done'
653 * function will be called afterward).
655 * ->port_dump_done() allows the implementation to release resources used
656 * for iteration. The caller might decide to stop iteration in the middle
657 * by calling this function before ->port_dump_next() returns nonzero.
665 * error = ofproto->ofproto_class->port_dump_start(ofproto, &state);
668 * struct ofproto_port port;
670 * error = ofproto->ofproto_class->port_dump_next(
671 * ofproto, state, &port);
675 * // Do something with 'port' here (without modifying or freeing
676 * // any of its data).
678 * ofproto->ofproto_class->port_dump_done(ofproto, state);
680 * // 'error' is now EOF (success) or a positive errno value (failure).
682 int (*port_dump_start)(const struct ofproto *ofproto, void **statep);
683 int (*port_dump_next)(const struct ofproto *ofproto, void *state,
684 struct ofproto_port *port);
685 int (*port_dump_done)(const struct ofproto *ofproto, void *state);
687 /* Polls for changes in the set of ports in 'ofproto'. If the set of ports
688 * in 'ofproto' has changed, then this function should do one of the
691 * - Preferably: store the name of the device that was added to or deleted
692 * from 'ofproto' in '*devnamep' and return 0. The caller is responsible
693 * for freeing '*devnamep' (with free()) when it no longer needs it.
695 * - Alternatively: return ENOBUFS, without indicating the device that was
698 * Occasional 'false positives', in which the function returns 0 while
699 * indicating a device that was not actually added or deleted or returns
700 * ENOBUFS without any change, are acceptable.
702 * The purpose of 'port_poll' is to let 'ofproto' know about changes made
703 * externally to the 'ofproto' object, e.g. by a system administrator via
704 * ovs-dpctl. Therefore, it's OK, and even preferable, for port_poll() to
705 * not report changes made through calls to 'port_add' or 'port_del' on the
706 * same 'ofproto' object. (But it's OK for it to report them too, just
707 * slightly less efficient.)
709 * If the set of ports in 'ofproto' has not changed, returns EAGAIN. May
710 * also return other positive errno values to indicate that something has
713 * If the set of ports in a datapath is fixed, or if the only way that the
714 * set of ports in a datapath can change is through ->port_add() and
715 * ->port_del(), then this function may be a null pointer.
717 int (*port_poll)(const struct ofproto *ofproto, char **devnamep);
719 /* Arranges for the poll loop to wake up when ->port_poll() will return a
720 * value other than EAGAIN.
722 * If the set of ports in a datapath is fixed, or if the only way that the
723 * set of ports in a datapath can change is through ->port_add() and
724 * ->port_del(), or if the poll loop will always wake up anyway when
725 * ->port_poll() will return a value other than EAGAIN, then this function
726 * may be a null pointer.
728 void (*port_poll_wait)(const struct ofproto *ofproto);
730 /* Checks the status of LACP negotiation for 'port'. Returns 1 if LACP
731 * partner information for 'port' is up-to-date, 0 if LACP partner
732 * information is not current (generally indicating a connectivity
733 * problem), or -1 if LACP is not enabled on 'port'.
735 * This function may be a null pointer if the ofproto implementation does
736 * not support LACP. */
737 int (*port_is_lacp_current)(const struct ofport *port);
739 /* ## ----------------------- ## */
740 /* ## OpenFlow Rule Functions ## */
741 /* ## ----------------------- ## */
743 /* Chooses an appropriate table for 'match' within 'ofproto'. On
744 * success, stores the table ID into '*table_idp' and returns 0. On
745 * failure, returns an OpenFlow error code.
747 * The choice of table should be a function of 'match' and 'ofproto''s
748 * datapath capabilities. It should not depend on the flows already in
749 * 'ofproto''s flow tables. Failure implies that an OpenFlow rule with
750 * 'match' as its matching condition can never be inserted into 'ofproto',
751 * even starting from an empty flow table.
753 * If multiple tables are candidates for inserting the flow, the function
754 * should choose one arbitrarily (but deterministically).
756 * If this function is NULL then table 0 is always chosen. */
757 enum ofperr (*rule_choose_table)(const struct ofproto *ofproto,
758 const struct match *match,
761 /* Life-cycle functions for a "struct rule" (see "Life Cycle" above).
764 * Asynchronous Operation Support
765 * ==============================
767 * The life-cycle operations on rules can operate asynchronously, meaning
768 * that ->rule_construct() and ->rule_destruct() only need to initiate
769 * their respective operations and do not need to wait for them to complete
770 * before they return. ->rule_modify_actions() also operates
773 * An ofproto implementation reports the success or failure of an
774 * asynchronous operation on a rule using the rule's 'pending' member,
775 * which points to a opaque "struct ofoperation" that represents the
776 * ongoing opreation. When the operation completes, the ofproto
777 * implementation calls ofoperation_complete(), passing the ofoperation and
778 * an error indication.
780 * Only the following contexts may call ofoperation_complete():
782 * - The function called to initiate the operation,
783 * e.g. ->rule_construct() or ->rule_destruct(). This is the best
784 * choice if the operation completes quickly.
786 * - The implementation's ->run() function.
788 * - The implementation's ->destruct() function.
790 * The ofproto base code updates the flow table optimistically, assuming
791 * that the operation will probably succeed:
793 * - ofproto adds or replaces the rule in the flow table before calling
794 * ->rule_construct().
796 * - ofproto updates the rule's actions before calling
797 * ->rule_modify_actions().
799 * - ofproto removes the rule before calling ->rule_destruct().
801 * With one exception, when an asynchronous operation completes with an
802 * error, ofoperation_complete() backs out the already applied changes:
804 * - If adding or replacing a rule in the flow table fails, ofproto
805 * removes the new rule or restores the original rule.
807 * - If modifying a rule's actions fails, ofproto restores the original
810 * - Removing a rule is not allowed to fail. It must always succeed.
812 * The ofproto base code serializes operations: if any operation is in
813 * progress on a given rule, ofproto postpones initiating any new operation
814 * on that rule until the pending operation completes. Therefore, every
815 * operation must eventually complete through a call to
816 * ofoperation_complete() to avoid delaying new operations indefinitely
817 * (including any OpenFlow request that affects the rule in question, even
818 * just to query its statistics).
824 * When ->rule_construct() is called, the caller has already inserted
825 * 'rule' into 'rule->ofproto''s flow table numbered 'rule->table_id'.
826 * There are two cases:
828 * - 'rule' is a new rule in its flow table. In this case,
829 * ofoperation_get_victim(rule) returns NULL.
831 * - 'rule' is replacing an existing rule in its flow table that had the
832 * same matching criteria and priority. In this case,
833 * ofoperation_get_victim(rule) returns the rule being replaced (the
836 * ->rule_construct() should set the following in motion:
838 * - Validate that the matching rule in 'rule->cr' is supported by the
839 * datapath. For example, if the rule's table does not support
840 * registers, then it is an error if 'rule->cr' does not wildcard all
843 * - Validate that the datapath can correctly implement 'rule->ofpacts'.
845 * - If the rule is valid, update the datapath flow table, adding the new
846 * rule or replacing the existing one.
848 * - If 'rule' is replacing an existing rule, uninitialize any derived
849 * state for the victim rule, as in step 5 in the "Life Cycle"
852 * (On failure, the ofproto code will roll back the insertion from the flow
853 * table, either removing 'rule' or replacing it by the victim rule if
856 * ->rule_construct() must act in one of the following ways:
858 * - If it succeeds, it must call ofoperation_complete() and return 0.
860 * - If it fails, it must act in one of the following ways:
862 * * Call ofoperation_complete() and return 0.
864 * * Return an OpenFlow error code. (Do not call
865 * ofoperation_complete() in this case.)
867 * Either way, ->rule_destruct() will not be called for 'rule', but
868 * ->rule_dealloc() will be.
870 * - If the operation is only partially complete, then it must return 0.
871 * Later, when the operation is complete, the ->run() or ->destruct()
872 * function must call ofoperation_complete() to report success or
875 * ->rule_construct() should not modify any base members of struct rule.
881 * When ->rule_destruct() is called, the caller has already removed 'rule'
882 * from 'rule->ofproto''s flow table. ->rule_destruct() should set in
883 * motion removing 'rule' from the datapath flow table. If removal
884 * completes synchronously, it should call ofoperation_complete().
885 * Otherwise, the ->run() or ->destruct() function must later call
886 * ofoperation_complete() after the operation completes.
888 * Rule destruction must not fail. */
889 struct rule *(*rule_alloc)(void);
890 enum ofperr (*rule_construct)(struct rule *rule);
891 void (*rule_destruct)(struct rule *rule);
892 void (*rule_dealloc)(struct rule *rule);
894 /* Obtains statistics for 'rule', storing the number of packets that have
895 * matched it in '*packet_count' and the number of bytes in those packets
896 * in '*byte_count'. UINT64_MAX indicates that the packet count or byte
897 * count is unknown. */
898 void (*rule_get_stats)(struct rule *rule, uint64_t *packet_count,
899 uint64_t *byte_count);
901 /* Applies the actions in 'rule' to 'packet'. (This implements sending
902 * buffered packets for OpenFlow OFPT_FLOW_MOD commands.)
904 * Takes ownership of 'packet' (so it should eventually free it, with
907 * 'flow' reflects the flow information for 'packet'. All of the
908 * information in 'flow' is extracted from 'packet', except for
909 * flow->tunnel and flow->in_port, which are assigned the correct values
910 * for the incoming packet. The register values are zeroed. 'packet''s
911 * header pointers (e.g. packet->l3) are appropriately initialized.
913 * The implementation should add the statistics for 'packet' into 'rule'.
915 * Returns 0 if successful, otherwise an OpenFlow error code. */
916 enum ofperr (*rule_execute)(struct rule *rule, const struct flow *flow,
917 struct ofpbuf *packet);
919 /* When ->rule_modify_actions() is called, the caller has already replaced
920 * the OpenFlow actions in 'rule' by a new set. (The original actions are
921 * in rule->pending->actions.)
923 * ->rule_modify_actions() should set the following in motion:
925 * - Validate that the datapath can correctly implement the actions now
928 * - Update the datapath flow table with the new actions.
930 * If the operation synchronously completes, ->rule_modify_actions() may
931 * call ofoperation_complete() before it returns. Otherwise, ->run()
932 * should call ofoperation_complete() later, after the operation does
935 * If the operation fails, then the base ofproto code will restore the
936 * original 'actions' and 'n_actions' of 'rule'.
938 * ->rule_modify_actions() should not modify any base members of struct
940 void (*rule_modify_actions)(struct rule *rule);
942 /* Changes the OpenFlow IP fragment handling policy to 'frag_handling',
943 * which takes one of the following values, with the corresponding
946 * - OFPC_FRAG_NORMAL: The switch should treat IP fragments the same way
947 * as other packets, omitting TCP and UDP port numbers (always setting
950 * - OFPC_FRAG_DROP: The switch should drop all IP fragments without
951 * passing them through the flow table.
953 * - OFPC_FRAG_REASM: The switch should reassemble IP fragments before
954 * passing packets through the flow table.
956 * - OFPC_FRAG_NX_MATCH (a Nicira extension): Similar to OFPC_FRAG_NORMAL,
957 * except that TCP and UDP port numbers should be included in fragments
960 * Implementations are not required to support every mode.
961 * OFPC_FRAG_NORMAL is the default mode when an ofproto is created.
963 * At the time of the call to ->set_frag_handling(), the current mode is
964 * available in 'ofproto->frag_handling'. ->set_frag_handling() returns
965 * true if the requested mode was set, false if it is not supported.
967 * Upon successful return, the caller changes 'ofproto->frag_handling' to
968 * reflect the new mode.
970 bool (*set_frag_handling)(struct ofproto *ofproto,
971 enum ofp_config_flags frag_handling);
973 /* Implements the OpenFlow OFPT_PACKET_OUT command. The datapath should
974 * execute the 'ofpacts_len' bytes of "struct ofpacts" in 'ofpacts'.
976 * The caller retains ownership of 'packet' and of 'ofpacts', so
977 * ->packet_out() should not modify or free them.
979 * This function must validate that it can correctly implement 'ofpacts'.
980 * If not, then it should return an OpenFlow error code.
982 * 'flow' reflects the flow information for 'packet'. All of the
983 * information in 'flow' is extracted from 'packet', except for
984 * flow->in_port (see below). flow->tunnel and its register values are
987 * flow->in_port comes from the OpenFlow OFPT_PACKET_OUT message. The
988 * implementation should reject invalid flow->in_port values by returning
989 * OFPERR_OFPBRC_BAD_PORT. (If the implementation called
990 * ofproto_init_max_ports(), then the client will reject these ports
991 * itself.) For consistency, the implementation should consider valid for
992 * flow->in_port any value that could possibly be seen in a packet that it
993 * passes to connmgr_send_packet_in(). Ideally, even an implementation
994 * that never generates packet-ins (e.g. due to hardware limitations)
995 * should still allow flow->in_port values for every possible physical port
996 * and OFPP_LOCAL. The only virtual ports (those above OFPP_MAX) that the
997 * caller will ever pass in as flow->in_port, other than OFPP_LOCAL, are
998 * OFPP_NONE and OFPP_CONTROLLER. The implementation should allow both of
999 * these, treating each of them as packets generated by the controller as
1000 * opposed to packets originating from some switch port.
1002 * (Ordinarily the only effect of flow->in_port is on output actions that
1003 * involve the input port, such as actions that output to OFPP_IN_PORT,
1004 * OFPP_FLOOD, or OFPP_ALL. flow->in_port can also affect Nicira extension
1005 * "resubmit" actions.)
1007 * 'packet' is not matched against the OpenFlow flow table, so its
1008 * statistics should not be included in OpenFlow flow statistics.
1010 * Returns 0 if successful, otherwise an OpenFlow error code. */
1011 enum ofperr (*packet_out)(struct ofproto *ofproto, struct ofpbuf *packet,
1012 const struct flow *flow,
1013 const struct ofpact *ofpacts,
1014 size_t ofpacts_len);
1016 /* ## ------------------------- ## */
1017 /* ## OFPP_NORMAL configuration ## */
1018 /* ## ------------------------- ## */
1020 /* Configures NetFlow on 'ofproto' according to the options in
1021 * 'netflow_options', or turns off NetFlow if 'netflow_options' is NULL.
1023 * EOPNOTSUPP as a return value indicates that 'ofproto' does not support
1024 * NetFlow, as does a null pointer. */
1025 int (*set_netflow)(struct ofproto *ofproto,
1026 const struct netflow_options *netflow_options);
1028 void (*get_netflow_ids)(const struct ofproto *ofproto,
1029 uint8_t *engine_type, uint8_t *engine_id);
1031 /* Configures sFlow on 'ofproto' according to the options in
1032 * 'sflow_options', or turns off sFlow if 'sflow_options' is NULL.
1034 * EOPNOTSUPP as a return value indicates that 'ofproto' does not support
1035 * sFlow, as does a null pointer. */
1036 int (*set_sflow)(struct ofproto *ofproto,
1037 const struct ofproto_sflow_options *sflow_options);
1039 /* Configures connectivity fault management on 'ofport'.
1041 * If 'cfm_settings' is nonnull, configures CFM according to its members.
1043 * If 'cfm_settings' is null, removes any connectivity fault management
1044 * configuration from 'ofport'.
1046 * EOPNOTSUPP as a return value indicates that this ofproto_class does not
1047 * support CFM, as does a null pointer. */
1048 int (*set_cfm)(struct ofport *ofport, const struct cfm_settings *s);
1050 /* Checks the fault status of CFM configured on 'ofport'. Returns a
1051 * bitmask of 'cfm_fault_reason's to indicate a CFM fault (generally
1052 * indicating a connectivity problem). Returns zero if CFM is not faulted,
1053 * and -1 if CFM is not enabled on 'port'.
1055 * This function may be a null pointer if the ofproto implementation does
1056 * not support CFM. */
1057 int (*get_cfm_fault)(const struct ofport *ofport);
1059 /* Check the operational status reported by the remote CFM endpoint of
1060 * 'ofp_port' Returns 1 if operationally up, 0 if operationally down, and
1061 * -1 if CFM is not enabled on 'ofp_port' or does not support operational
1064 * This function may be a null pointer if the ofproto implementation does
1065 * not support CFM. */
1066 int (*get_cfm_opup)(const struct ofport *ofport);
1068 /* Gets the MPIDs of the remote maintenance points broadcasting to
1069 * 'ofport'. Populates 'rmps' with a provider owned array of MPIDs, and
1070 * 'n_rmps' with the number of MPIDs in 'rmps'. Returns a number less than
1071 * 0 if CFM is not enabled of 'ofport'.
1073 * This function may be a null pointer if the ofproto implementation does
1074 * not support CFM. */
1075 int (*get_cfm_remote_mpids)(const struct ofport *ofport,
1076 const uint64_t **rmps, size_t *n_rmps);
1078 /* Checks the health of CFM configured on 'ofport'. Returns an integer
1079 * to indicate the health percentage of the 'ofport' which is an average of
1080 * the health of all the remote_mps. Returns an integer between 0 and 100
1081 * where 0 means that the 'ofport' is very unhealthy and 100 means the
1082 * 'ofport' is perfectly healthy. Returns -1 if CFM is not enabled on
1083 * 'port' or if the number of remote_mpids is > 1.
1085 * This function may be a null pointer if the ofproto implementation does
1086 * not support CFM. */
1087 int (*get_cfm_health)(const struct ofport *ofport);
1089 /* Configures spanning tree protocol (STP) on 'ofproto' using the
1090 * settings defined in 's'.
1092 * If 's' is nonnull, configures STP according to its members.
1094 * If 's' is null, removes any STP configuration from 'ofproto'.
1096 * EOPNOTSUPP as a return value indicates that this ofproto_class does not
1097 * support STP, as does a null pointer. */
1098 int (*set_stp)(struct ofproto *ofproto,
1099 const struct ofproto_stp_settings *s);
1101 /* Retrieves state of spanning tree protocol (STP) on 'ofproto'.
1103 * Stores STP state for 'ofproto' in 's'. If the 'enabled' member
1104 * is false, the other member values are not meaningful.
1106 * EOPNOTSUPP as a return value indicates that this ofproto_class does not
1107 * support STP, as does a null pointer. */
1108 int (*get_stp_status)(struct ofproto *ofproto,
1109 struct ofproto_stp_status *s);
1111 /* Configures spanning tree protocol (STP) on 'ofport' using the
1112 * settings defined in 's'.
1114 * If 's' is nonnull, configures STP according to its members. The
1115 * caller is responsible for assigning STP port numbers (using the
1116 * 'port_num' member in the range of 1 through 255, inclusive) and
1117 * ensuring there are no duplicates.
1119 * If 's' is null, removes any STP configuration from 'ofport'.
1121 * EOPNOTSUPP as a return value indicates that this ofproto_class does not
1122 * support STP, as does a null pointer. */
1123 int (*set_stp_port)(struct ofport *ofport,
1124 const struct ofproto_port_stp_settings *s);
1126 /* Retrieves spanning tree protocol (STP) port status of 'ofport'.
1128 * Stores STP state for 'ofport' in 's'. If the 'enabled' member is
1129 * false, the other member values are not meaningful.
1131 * EOPNOTSUPP as a return value indicates that this ofproto_class does not
1132 * support STP, as does a null pointer. */
1133 int (*get_stp_port_status)(struct ofport *ofport,
1134 struct ofproto_port_stp_status *s);
1136 /* Registers meta-data associated with the 'n_qdscp' Qualities of Service
1137 * 'queues' attached to 'ofport'. This data is not intended to be
1138 * sufficient to implement QoS. Instead, providers may use this
1139 * information to implement features which require knowledge of what queues
1140 * exist on a port, and some basic information about them.
1142 * EOPNOTSUPP as a return value indicates that this ofproto_class does not
1143 * support QoS, as does a null pointer. */
1144 int (*set_queues)(struct ofport *ofport,
1145 const struct ofproto_port_queue *queues, size_t n_qdscp);
1147 /* If 's' is nonnull, this function registers a "bundle" associated with
1148 * client data pointer 'aux' in 'ofproto'. A bundle is the same concept as
1149 * a Port in OVSDB, that is, it consists of one or more "slave" devices
1150 * (Interfaces, in OVSDB) along with VLAN and LACP configuration and, if
1151 * there is more than one slave, a bonding configuration. If 'aux' is
1152 * already registered then this function updates its configuration to 's'.
1153 * Otherwise, this function registers a new bundle.
1155 * If 's' is NULL, this function unregisters the bundle registered on
1156 * 'ofproto' associated with client data pointer 'aux'. If no such bundle
1157 * has been registered, this has no effect.
1159 * This function affects only the behavior of the NXAST_AUTOPATH action and
1160 * output to the OFPP_NORMAL port. An implementation that does not support
1161 * it at all may set it to NULL or return EOPNOTSUPP. An implementation
1162 * that supports only a subset of the functionality should implement what
1163 * it can and return 0. */
1164 int (*bundle_set)(struct ofproto *ofproto, void *aux,
1165 const struct ofproto_bundle_settings *s);
1167 /* If 'port' is part of any bundle, removes it from that bundle. If the
1168 * bundle now has no ports, deletes the bundle. If the bundle now has only
1169 * one port, deconfigures the bundle's bonding configuration. */
1170 void (*bundle_remove)(struct ofport *ofport);
1172 /* If 's' is nonnull, this function registers a mirror associated with
1173 * client data pointer 'aux' in 'ofproto'. A mirror is the same concept as
1174 * a Mirror in OVSDB. If 'aux' is already registered then this function
1175 * updates its configuration to 's'. Otherwise, this function registers a
1178 * If 's' is NULL, this function unregisters the mirror registered on
1179 * 'ofproto' associated with client data pointer 'aux'. If no such mirror
1180 * has been registered, this has no effect.
1182 * An implementation that does not support mirroring at all may set
1183 * it to NULL or return EOPNOTSUPP. An implementation that supports
1184 * only a subset of the functionality should implement what it can
1186 int (*mirror_set)(struct ofproto *ofproto, void *aux,
1187 const struct ofproto_mirror_settings *s);
1189 /* Retrieves statistics from mirror associated with client data
1190 * pointer 'aux' in 'ofproto'. Stores packet and byte counts in
1191 * 'packets' and 'bytes', respectively. If a particular counter is
1192 * not supported, the appropriate argument is set to UINT64_MAX.
1194 * EOPNOTSUPP as a return value indicates that this ofproto_class does not
1195 * support retrieving mirror statistics. */
1196 int (*mirror_get_stats)(struct ofproto *ofproto, void *aux,
1197 uint64_t *packets, uint64_t *bytes);
1199 /* Configures the VLANs whose bits are set to 1 in 'flood_vlans' as VLANs
1200 * on which all packets are flooded, instead of using MAC learning. If
1201 * 'flood_vlans' is NULL, then MAC learning applies to all VLANs.
1203 * This function affects only the behavior of the OFPP_NORMAL action. An
1204 * implementation that does not support it may set it to NULL or return
1206 int (*set_flood_vlans)(struct ofproto *ofproto,
1207 unsigned long *flood_vlans);
1209 /* Returns true if 'aux' is a registered bundle that is currently in use as
1210 * the output for a mirror. */
1211 bool (*is_mirror_output_bundle)(const struct ofproto *ofproto, void *aux);
1213 /* When the configuration option of forward_bpdu changes, this function
1214 * will be invoked. */
1215 void (*forward_bpdu_changed)(struct ofproto *ofproto);
1217 /* Sets the MAC aging timeout for the OFPP_NORMAL action to 'idle_time',
1219 void (*set_mac_idle_time)(struct ofproto *ofproto, unsigned int idle_time);
1221 /* Linux VLAN device support (e.g. "eth0.10" for VLAN 10.)
1223 * This is deprecated. It is only for compatibility with broken device drivers
1224 * in old versions of Linux that do not properly support VLANs when VLAN
1225 * devices are not used. When broken device drivers are no longer in
1226 * widespread use, we will delete these interfaces. */
1228 /* If 'realdev_ofp_port' is nonzero, then this function configures 'ofport'
1229 * as a VLAN splinter port for VLAN 'vid', associated with the real device
1230 * that has OpenFlow port number 'realdev_ofp_port'.
1232 * If 'realdev_ofp_port' is zero, then this function deconfigures 'ofport'
1233 * as a VLAN splinter port.
1235 * This function should be NULL if a an implementation does not support
1237 int (*set_realdev)(struct ofport *ofport,
1238 uint16_t realdev_ofp_port, int vid);
1241 extern const struct ofproto_class ofproto_dpif_class;
1243 int ofproto_class_register(const struct ofproto_class *);
1244 int ofproto_class_unregister(const struct ofproto_class *);
1246 /* ofproto_flow_mod() returns this value if the flow_mod could not be processed
1247 * because it overlaps with an ongoing flow table operation that has not yet
1248 * completed. The caller should retry the operation later.
1250 * ofproto.c also uses this value internally for additional (similar) purposes.
1252 * This particular value is a good choice because it is large, so that it does
1253 * not collide with any errno value, but not large enough to collide with an
1254 * OFPERR_* value. */
1255 enum { OFPROTO_POSTPONE = 1 << 16 };
1256 BUILD_ASSERT_DECL(OFPROTO_POSTPONE < OFPERR_OFS);
1258 int ofproto_flow_mod(struct ofproto *, const struct ofputil_flow_mod *);
1259 void ofproto_add_flow(struct ofproto *, const struct match *,
1260 unsigned int priority,
1261 const struct ofpact *ofpacts, size_t ofpacts_len);
1262 bool ofproto_delete_flow(struct ofproto *,
1263 const struct match *, unsigned int priority);
1264 void ofproto_flush_flows(struct ofproto *);
1266 #endif /* ofproto/ofproto-provider.h */