2 * Copyright (c) 2009, 2010, 2011 Nicira Networks.
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_PRIVATE_H
18 #define OFPROTO_PRIVATE_H 1
20 /* Definitions for use within ofproto. */
22 #include "ofproto/ofproto.h"
23 #include "classifier.h"
28 /* An OpenFlow switch.
30 * With few exceptions, ofproto implementations may look at these fields but
31 * should not modify them. */
33 const struct ofproto_class *ofproto_class;
34 char *type; /* Datapath type. */
35 char *name; /* Datapath name. */
36 struct hmap_node hmap_node; /* In global 'all_ofprotos' hmap. */
39 uint64_t fallback_dpid; /* Datapath ID if no better choice found. */
40 uint64_t datapath_id; /* Datapath ID. */
41 char *mfr_desc; /* Manufacturer. */
42 char *hw_desc; /* Hardware. */
43 char *sw_desc; /* Software version. */
44 char *serial_desc; /* Serial number. */
45 char *dp_desc; /* Datapath description. */
48 struct hmap ports; /* Contains "struct ofport"s. */
49 struct shash port_by_name;
52 struct classifier *tables; /* Each classifier contains "struct rule"s. */
55 /* OpenFlow connections. */
56 struct connmgr *connmgr;
59 struct ofproto *ofproto_lookup(const char *name);
60 struct ofport *ofproto_get_port(const struct ofproto *, uint16_t ofp_port);
62 /* An OpenFlow port within a "struct ofproto".
64 * With few exceptions, ofproto implementations may look at these fields but
65 * should not modify them. */
67 struct ofproto *ofproto; /* The ofproto that contains this port. */
68 struct hmap_node hmap_node; /* In struct ofproto's "ports" hmap. */
69 struct netdev *netdev;
70 struct ofp_phy_port opp;
71 uint16_t ofp_port; /* OpenFlow port number. */
72 unsigned int change_seq;
75 /* An OpenFlow flow within a "struct ofproto".
77 * With few exceptions, ofproto implementations may look at these fields but
78 * should not modify them. */
80 struct ofproto *ofproto; /* The ofproto that contains this rule. */
81 struct list ofproto_node; /* Owned by ofproto base code. */
82 struct cls_rule cr; /* In owning ofproto's classifier. */
84 ovs_be64 flow_cookie; /* Controller-issued identifier. */
86 long long int created; /* Creation time. */
87 uint16_t idle_timeout; /* In seconds from time of last use. */
88 uint16_t hard_timeout; /* In seconds from time of creation. */
89 uint8_t table_id; /* Index in ofproto's 'tables' array. */
90 bool send_flow_removed; /* Send a flow removed message? */
92 union ofp_action *actions; /* OpenFlow actions. */
93 int n_actions; /* Number of elements in actions[]. */
96 static inline struct rule *
97 rule_from_cls_rule(const struct cls_rule *cls_rule)
99 return cls_rule ? CONTAINER_OF(cls_rule, struct rule, cr) : NULL;
102 void ofproto_rule_expire(struct rule *, uint8_t reason);
103 void ofproto_rule_destroy(struct rule *);
105 /* ofproto class structure, to be defined by each ofproto implementation.
111 * These functions work primarily with three different kinds of data
114 * - "struct ofproto", which represents an OpenFlow switch.
116 * - "struct ofport", which represents a port within an ofproto.
118 * - "struct rule", which represents an OpenFlow flow within an ofproto.
120 * Each of these data structures contains all of the implementation-independent
121 * generic state for the respective concept, called the "base" state. None of
122 * them contains any extra space for ofproto implementations to use. Instead,
123 * each implementation is expected to declare its own data structure that
124 * contains an instance of the generic data structure plus additional
125 * implementation-specific members, called the "derived" state. The
126 * implementation can use casts or (preferably) the CONTAINER_OF macro to
127 * obtain access to derived state given only a pointer to the embedded generic
134 * Four stylized functions accompany each of these data structures:
136 * "alloc" "construct" "destruct" "dealloc"
137 * ------------ ---------------- --------------- --------------
138 * ofproto ->alloc ->construct ->destruct ->dealloc
139 * ofport ->port_alloc ->port_construct ->port_destruct ->port_dealloc
140 * rule ->rule_alloc ->rule_construct ->rule_destruct ->rule_dealloc
142 * Any instance of a given data structure goes through the following life
145 * 1. The client calls the "alloc" function to obtain raw memory. If "alloc"
146 * fails, skip all the other steps.
148 * 2. The client initializes all of the data structure's base state. If this
149 * fails, skip to step 7.
151 * 3. The client calls the "construct" function. The implementation
152 * initializes derived state. It may refer to the already-initialized
153 * base state. If "construct" fails, skip to step 6.
155 * 4. The data structure is now initialized and in use.
157 * 5. When the data structure is no longer needed, the client calls the
158 * "destruct" function. The implementation uninitializes derived state.
159 * The base state has not been uninitialized yet, so the implementation
160 * may still refer to it.
162 * 6. The client uninitializes all of the data structure's base state.
164 * 7. The client calls the "dealloc" to free the raw memory. The
165 * implementation must not refer to base or derived state in the data
166 * structure, because it has already been uninitialized.
168 * Each "alloc" function allocates and returns a new instance of the respective
169 * data structure. The "alloc" function is not given any information about the
170 * use of the new data structure, so it cannot perform much initialization.
171 * Its purpose is just to ensure that the new data structure has enough room
172 * for base and derived state. It may return a null pointer if memory is not
173 * available, in which case none of the other functions is called.
175 * Each "construct" function initializes derived state in its respective data
176 * structure. When "construct" is called, all of the base state has already
177 * been initialized, so the "construct" function may refer to it. The
178 * "construct" function is allowed to fail, in which case the client calls the
179 * "dealloc" function (but not the "destruct" function).
181 * Each "destruct" function uninitializes and frees derived state in its
182 * respective data structure. When "destruct" is called, the base state has
183 * not yet been uninitialized, so the "destruct" function may refer to it. The
184 * "destruct" function is not allowed to fail.
186 * Each "dealloc" function frees raw memory that was allocated by the the
187 * "alloc" function. The memory's base and derived members might not have ever
188 * been initialized (but if "construct" returned successfully, then it has been
189 * "destruct"ed already). The "dealloc" function is not allowed to fail.
195 * Most of these functions return 0 if they are successful or a positive error
196 * code on failure. Depending on the function, valid error codes are either
197 * errno values or OpenFlow error codes constructed with ofp_mkerr().
199 * Most of these functions are expected to execute synchronously, that is, to
200 * block as necessary to obtain a result. Thus, these functions may return
201 * EAGAIN (or EWOULDBLOCK or EINPROGRESS) only where the function descriptions
202 * explicitly say those errors are a possibility. We may relax this
203 * requirement in the future if and when we encounter performance problems. */
204 struct ofproto_class {
205 /* ## ----------------- ## */
206 /* ## Factory Functions ## */
207 /* ## ----------------- ## */
209 /* Enumerates the types of all support ofproto types into 'types'. The
210 * caller has already initialized 'types' and other ofproto classes might
211 * already have added names to it. */
212 void (*enumerate_types)(struct sset *types);
214 /* Enumerates the names of all existing datapath of the specified 'type'
215 * into 'names' 'all_dps'. The caller has already initialized 'names' as
218 * 'type' is one of the types enumerated by ->enumerate_types().
220 * Returns 0 if successful, otherwise a positive errno value.
222 int (*enumerate_names)(const char *type, struct sset *names);
224 /* Deletes the datapath with the specified 'type' and 'name'. The caller
225 * should have closed any open ofproto with this 'type' and 'name'; this
226 * function is allowed to fail if that is not the case.
228 * 'type' is one of the types enumerated by ->enumerate_types().
229 * 'name' is one of the names enumerated by ->enumerate_names() for 'type'.
231 * Returns 0 if successful, otherwise a positive errno value.
233 int (*del)(const char *type, const char *name);
235 /* ## --------------------------- ## */
236 /* ## Top-Level ofproto Functions ## */
237 /* ## --------------------------- ## */
239 /* Life-cycle functions for an "ofproto" (see "Life Cycle" above).
241 * ->construct() should not modify most base members of the ofproto. In
242 * particular, the client will initialize the ofproto's 'ports' member
243 * after construction is complete.
245 * ->construct() should initialize the base 'n_tables' member to the number
246 * of flow tables supported by the datapath (between 1 and 255, inclusive),
247 * initialize the base 'tables' member with space for one classifier per
248 * table, and initialize each classifier with classifier_init. Each flow
249 * table should be initially empty, so ->construct() should delete flows
250 * from the underlying datapath, if necessary, rather than populating the
253 * Only one ofproto instance needs to be supported for any given datapath.
254 * If a datapath is already open as part of one "ofproto", then another
255 * attempt to "construct" the same datapath as part of another ofproto is
256 * allowed to fail with an error.
258 * ->construct() returns 0 if successful, otherwise a positive errno
260 struct ofproto *(*alloc)(void);
261 int (*construct)(struct ofproto *ofproto);
262 void (*destruct)(struct ofproto *ofproto);
263 void (*dealloc)(struct ofproto *ofproto);
265 /* Performs any periodic activity required by 'ofproto'. It should:
267 * - Call connmgr_send_packet_in() for each received packet that missed
268 * in the OpenFlow flow table or that had a OFPP_CONTROLLER output
271 * - Call ofproto_rule_expire() for each OpenFlow flow that has reached
272 * its hard_timeout or idle_timeout, to expire the flow.
274 * Returns 0 if successful, otherwise a positive errno value. The ENODEV
275 * return value specifically means that the datapath underlying 'ofproto'
276 * has been destroyed (externally, e.g. by an admin running ovs-dpctl).
278 int (*run)(struct ofproto *ofproto);
280 /* Causes the poll loop to wake up when 'ofproto''s 'run' function needs to
281 * be called, e.g. by calling the timer or fd waiting functions in
283 void (*wait)(struct ofproto *ofproto);
285 /* Every "struct rule" in 'ofproto' is about to be deleted, one by one.
286 * This function may prepare for that, for example by clearing state in
287 * advance. It should *not* actually delete any "struct rule"s from
288 * 'ofproto', only prepare for it.
290 * This function is optional; it's really just for optimization in case
291 * it's cheaper to delete all the flows from your hardware in a single pass
292 * than to do it one by one. */
293 void (*flush)(struct ofproto *ofproto);
295 /* Helper for the OpenFlow OFPT_FEATURES_REQUEST request.
297 * The implementation should store true in '*arp_match_ip' if the switch
298 * supports matching IP addresses inside ARP requests and replies, false
301 * The implementation should store in '*actions' a bitmap of the supported
302 * OpenFlow actions: the bit with value (1 << n) should be set to 1 if the
303 * implementation supports the action with value 'n', and to 0 otherwise.
304 * For example, if the implementation supports the OFPAT_OUTPUT and
305 * OFPAT_ENQUEUE actions, but no others, it would set '*actions' to (1 <<
306 * OFPAT_OUTPUT) | (1 << OFPAT_ENQUEUE). Vendor actions are not included
308 void (*get_features)(struct ofproto *ofproto,
309 bool *arp_match_ip, uint32_t *actions);
311 /* Helper for the OpenFlow OFPST_TABLE statistics request.
313 * The 'ots' array contains 'ofproto->n_tables' elements. Each element is
316 * - 'table_id' to the array index.
318 * - 'name' to "table#" where # is the table ID.
320 * - 'wildcards' to OFPFW_ALL.
322 * - 'max_entries' to 1,000,000.
324 * - 'active_count' to the classifier_count() for the table.
326 * - 'lookup_count' and 'matched_count' to 0.
328 * The implementation should update any members in each element for which
329 * it has better values:
331 * - 'name' to a more meaningful name.
333 * - 'wildcards' to the set of wildcards actually supported by the table
334 * (if it doesn't support all OpenFlow wildcards).
336 * - 'max_entries' to the maximum number of flows actually supported by
339 * - 'lookup_count' to the number of packets looked up in this flow table
342 * - 'matched_count' to the number of packets looked up in this flow
343 * table so far that matched one of the flow entries.
345 * Keep in mind that all of the members of struct ofp_table_stats are in
346 * network byte order.
348 void (*get_tables)(struct ofproto *ofproto, struct ofp_table_stats *ots);
350 /* ## ---------------- ## */
351 /* ## ofport Functions ## */
352 /* ## ---------------- ## */
354 /* Life-cycle functions for a "struct ofport" (see "Life Cycle" above).
356 * ->port_construct() should not modify any base members of the ofport.
358 * ofports are managed by the base ofproto code. The ofproto
359 * implementation should only create and destroy them in response to calls
360 * to these functions. The base ofproto code will create and destroy
361 * ofports in the following situations:
363 * - Just after the ->construct() function is called, the base ofproto
364 * iterates over all of the implementation's ports, using
365 * ->port_dump_start() and related functions, and constructs an ofport
366 * for each dumped port.
368 * - If ->port_poll() reports that a specific port has changed, then the
369 * base ofproto will query that port with ->port_query_by_name() and
370 * construct or destruct ofports as necessary to reflect the updated
373 * - If ->port_poll() returns ENOBUFS to report an unspecified port set
374 * change, then the base ofproto will iterate over all of the
375 * implementation's ports, in the same way as at ofproto
376 * initialization, and construct and destruct ofports to reflect all of
379 * ->port_construct() returns 0 if successful, otherwise a positive errno
382 struct ofport *(*port_alloc)(void);
383 int (*port_construct)(struct ofport *ofport);
384 void (*port_destruct)(struct ofport *ofport);
385 void (*port_dealloc)(struct ofport *ofport);
387 /* Called after 'ofport->netdev' is replaced by a new netdev object. If
388 * the ofproto implementation uses the ofport's netdev internally, then it
389 * should switch to using the new one. The old one has been closed.
391 * An ofproto implementation that doesn't need to do anything in this
392 * function may use a null pointer. */
393 void (*port_modified)(struct ofport *ofport);
395 /* Called after an OpenFlow OFPT_PORT_MOD request changes a port's
396 * configuration. 'ofport->opp.config' contains the new configuration.
397 * 'old_config' contains the previous configuration.
399 * The caller implements OFPPC_PORT_DOWN using netdev functions to turn
400 * NETDEV_UP on and off, so this function doesn't have to do anything for
401 * that bit (and it won't be called if that is the only bit that
403 void (*port_reconfigured)(struct ofport *ofport, ovs_be32 old_config);
405 /* Looks up a port named 'devname' in 'ofproto'. On success, initializes
406 * '*port' appropriately.
408 * The caller owns the data in 'port' and must free it with
409 * ofproto_port_destroy() when it is no longer needed. */
410 int (*port_query_by_name)(const struct ofproto *ofproto,
411 const char *devname, struct ofproto_port *port);
413 /* Attempts to add 'netdev' as a port on 'ofproto'. Returns 0 if
414 * successful, otherwise a positive errno value. If successful, sets
415 * '*ofp_portp' to the new port's port number.
417 * It doesn't matter whether the new port will be returned by a later call
418 * to ->port_poll(); the implementation may do whatever is more
420 int (*port_add)(struct ofproto *ofproto, struct netdev *netdev,
421 uint16_t *ofp_portp);
423 /* Deletes port number 'ofp_port' from the datapath for 'ofproto'. Returns
424 * 0 if successful, otherwise a positive errno value.
426 * It doesn't matter whether the new port will be returned by a later call
427 * to ->port_poll(); the implementation may do whatever is more
429 int (*port_del)(struct ofproto *ofproto, uint16_t ofp_port);
431 /* Attempts to begin dumping the ports in 'ofproto'. On success, returns 0
432 * and initializes '*statep' with any data needed for iteration. On
433 * failure, returns a positive errno value. */
434 int (*port_dump_start)(const struct ofproto *ofproto, void **statep);
436 /* Attempts to retrieve another port from 'ofproto' for 'state', which was
437 * initialized by a successful call to the 'port_dump_start' function for
438 * 'ofproto'. On success, stores a new ofproto_port into 'port' and
439 * returns 0. Returns EOF if the end of the port table has been reached,
440 * or a positive errno value on error. This function will not be called
441 * again once it returns nonzero once for a given iteration (but the
442 * 'port_dump_done' function will be called afterward).
444 * The ofproto provider retains ownership of the data stored in 'port'. It
445 * must remain valid until at least the next call to 'port_dump_next' or
446 * 'port_dump_done' for 'state'. */
447 int (*port_dump_next)(const struct ofproto *ofproto, void *state,
448 struct ofproto_port *port);
450 /* Releases resources from 'ofproto' for 'state', which was initialized by
451 * a successful call to the 'port_dump_start' function for 'ofproto'. */
452 int (*port_dump_done)(const struct ofproto *ofproto, void *state);
454 /* Polls for changes in the set of ports in 'ofproto'. If the set of ports
455 * in 'ofproto' has changed, then this function should do one of the
458 * - Preferably: store the name of the device that was added to or deleted
459 * from 'ofproto' in '*devnamep' and return 0. The caller is responsible
460 * for freeing '*devnamep' (with free()) when it no longer needs it.
462 * - Alternatively: return ENOBUFS, without indicating the device that was
465 * Occasional 'false positives', in which the function returns 0 while
466 * indicating a device that was not actually added or deleted or returns
467 * ENOBUFS without any change, are acceptable.
469 * The purpose of 'port_poll' is to let 'ofproto' know about changes made
470 * externally to the 'ofproto' object, e.g. by a system administrator via
471 * ovs-dpctl. Therefore, it's OK, and even preferable, for port_poll() to
472 * not report changes made through calls to 'port_add' or 'port_del' on the
473 * same 'ofproto' object. (But it's OK for it to report them too, just
474 * slightly less efficient.)
476 * If the set of ports in 'ofproto' has not changed, returns EAGAIN. May
477 * also return other positive errno values to indicate that something has
480 * If the set of ports in a datapath is fixed, or if the only way that the
481 * set of ports in a datapath can change is through ->port_add() and
482 * ->port_del(), then this function may be a null pointer.
484 int (*port_poll)(const struct ofproto *ofproto, char **devnamep);
486 /* Arranges for the poll loop to wake up when ->port_poll() will return a
487 * value other than EAGAIN.
489 * If the set of ports in a datapath is fixed, or if the only way that the
490 * set of ports in a datapath can change is through ->port_add() and
491 * ->port_del(), or if the poll loop will always wake up anyway when
492 * ->port_poll() will return a value other than EAGAIN, then this function
493 * may be a null pointer.
495 void (*port_poll_wait)(const struct ofproto *ofproto);
497 /* Checks the status of LACP negotiation for 'port'. Returns 1 if LACP
498 * partner information for 'port' is up-to-date, 0 if LACP partner
499 * information is not current (generally indicating a connectivity
500 * problem), or -1 if LACP is not enabled on 'port'.
502 * This function may be a null pointer if the ofproto implementation does
503 * not support LACP. */
504 int (*port_is_lacp_current)(const struct ofport *port);
506 /* ## ----------------------- ## */
507 /* ## OpenFlow Rule Functions ## */
508 /* ## ----------------------- ## */
510 /* Chooses an appropriate table for 'cls_rule' within 'ofproto'. On
511 * success, stores the table ID into '*table_idp' and returns 0. On
512 * failure, returns an OpenFlow error code (as returned by ofp_mkerr()).
514 * The choice of table should be a function of 'cls_rule' and 'ofproto''s
515 * datapath capabilities. It should not depend on the flows already in
516 * 'ofproto''s flow tables. Failure implies that an OpenFlow rule with
517 * 'cls_rule' as its matching condition can never be inserted into
518 * 'ofproto', even starting from an empty flow table.
520 * If multiple tables are candidates for inserting the flow, the function
521 * should choose one arbitrarily (but deterministically).
523 * This function will never be called for an ofproto that has only one
524 * table, so it may be NULL in that case. */
525 int (*rule_choose_table)(const struct ofproto *ofproto,
526 const struct cls_rule *cls_rule,
529 /* Life-cycle functions for a "struct rule" (see "Life Cycle" above).
531 * ->rule_construct() should first check whether the rule is acceptable:
533 * - Validate that the matching rule in 'rule->cr' is supported by the
534 * datapath. If not, then return an OpenFlow error code (as returned
537 * For example, if the datapath does not support registers, then it
538 * should return an error if 'rule->cr' does not wildcard all
541 * - Validate that 'rule->actions' and 'rule->n_actions' are well-formed
542 * OpenFlow actions that can be correctly implemented by the datapath.
543 * If not, then return an OpenFlow error code (as returned by
546 * The validate_actions() function (in ofp-util.c) can be useful as a
547 * model for action validation, but it accepts all of the OpenFlow
548 * actions that OVS understands. If your ofproto implementation only
549 * implements a subset of those, then you should implement your own
552 * If the rule is acceptable, then ->rule_construct() should modify the
555 * - If there was already a rule with exactly the same matching criteria
556 * and priority in the classifier, then it should destroy it (with
557 * ofproto_rule_destroy()).
559 * To the greatest extent possible, the old rule should be destroyed
560 * only if inserting the new rule succeeds; that is, ->rule_construct()
561 * should be transactional.
563 * The function classifier_find_rule_exactly() can locate such a rule.
565 * - Insert the new rule into the ofproto's 'cls' classifier, and into
566 * the datapath flow table.
568 * The function classifier_insert() inserts a rule into the classifier.
570 * Other than inserting 'rule->cr' into the classifier, ->rule_construct()
571 * should not modify any base members of struct rule.
573 * ->rule_destruct() should remove 'rule' from the ofproto's 'cls'
574 * classifier (e.g. with classifier_remove()) and from the datapath flow
576 struct rule *(*rule_alloc)(void);
577 int (*rule_construct)(struct rule *rule);
578 void (*rule_destruct)(struct rule *rule);
579 void (*rule_dealloc)(struct rule *rule);
581 /* Obtains statistics for 'rule', storing the number of packets that have
582 * matched it in '*packet_count' and the number of bytes in those packets
583 * in '*byte_count'. */
584 void (*rule_get_stats)(struct rule *rule, uint64_t *packet_count,
585 uint64_t *byte_count);
587 /* Applies the actions in 'rule' to 'packet'. (This implements sending
588 * buffered packets for OpenFlow OFPT_FLOW_MOD commands.)
590 * Takes ownership of 'packet' (so it should eventually free it, with
593 * 'flow' reflects the flow information for 'packet'. All of the
594 * information in 'flow' is extracted from 'packet', except for
595 * flow->tun_id and flow->in_port, which are assigned the correct values
596 * for the incoming packet. The register values are zeroed.
598 * The statistics for 'packet' should be included in 'rule'.
600 * Returns 0 if successful, otherwise an OpenFlow error code (as returned
601 * by ofp_mkerr()). */
602 int (*rule_execute)(struct rule *rule, struct flow *flow,
603 struct ofpbuf *packet);
605 /* Validates that the 'n' elements in 'actions' are well-formed OpenFlow
606 * actions that can be correctly implemented by the datapath. If not, then
607 * return an OpenFlow error code (as returned by ofp_mkerr()). If so,
608 * then update the datapath to implement the new actions and return 0.
610 * When this function runs, 'rule' still has its original actions. If this
611 * function returns 0, then the caller will update 'rule' with the new
612 * actions and free the old ones. */
613 int (*rule_modify_actions)(struct rule *rule,
614 const union ofp_action *actions, size_t n);
616 /* These functions implement the OpenFlow IP fragment handling policy. By
617 * default ('drop_frags' == false), an OpenFlow switch should treat IP
618 * fragments the same way as other packets (although TCP and UDP port
619 * numbers cannot be determined). With 'drop_frags' == true, the switch
620 * should drop all IP fragments without passing them through the flow
622 bool (*get_drop_frags)(struct ofproto *ofproto);
623 void (*set_drop_frags)(struct ofproto *ofproto, bool drop_frags);
625 /* Implements the OpenFlow OFPT_PACKET_OUT command. The datapath should
626 * execute the 'n_actions' in the 'actions' array on 'packet'.
628 * The caller retains ownership of 'packet', so ->packet_out() should not
631 * This function must validate that the 'n_actions' elements in 'actions'
632 * are well-formed OpenFlow actions that can be correctly implemented by
633 * the datapath. If not, then it should return an OpenFlow error code (as
634 * returned by ofp_mkerr()).
636 * 'flow' reflects the flow information for 'packet'. All of the
637 * information in 'flow' is extracted from 'packet', except for
638 * flow->in_port, which is taken from the OFPT_PACKET_OUT message.
639 * flow->tun_id and its register values are zeroed.
641 * 'packet' is not matched against the OpenFlow flow table, so its
642 * statistics should not be included in OpenFlow flow statistics.
644 * Returns 0 if successful, otherwise an OpenFlow error code (as returned
645 * by ofp_mkerr()). */
646 int (*packet_out)(struct ofproto *ofproto, struct ofpbuf *packet,
647 const struct flow *flow,
648 const union ofp_action *actions,
651 /* ## ------------------------- ## */
652 /* ## OFPP_NORMAL configuration ## */
653 /* ## ------------------------- ## */
655 /* Configures NetFlow on 'ofproto' according to the options in
656 * 'netflow_options', or turns off NetFlow if 'netflow_options' is NULL.
658 * EOPNOTSUPP as a return value indicates that 'ofproto' does not support
659 * NetFlow, as does a null pointer. */
660 int (*set_netflow)(struct ofproto *ofproto,
661 const struct netflow_options *netflow_options);
663 void (*get_netflow_ids)(const struct ofproto *ofproto,
664 uint8_t *engine_type, uint8_t *engine_id);
666 /* Configures sFlow on 'ofproto' according to the options in
667 * 'sflow_options', or turns off sFlow if 'sflow_options' is NULL.
669 * EOPNOTSUPP as a return value indicates that 'ofproto' does not support
670 * sFlow, as does a null pointer. */
671 int (*set_sflow)(struct ofproto *ofproto,
672 const struct ofproto_sflow_options *sflow_options);
674 /* Configures connectivity fault management on 'ofport'.
676 * If 'cfm_settings' is nonnull, configures CFM according to its members.
678 * If 'cfm_settings' is null, removes any connectivity fault management
679 * configuration from 'ofport'.
681 * EOPNOTSUPP as a return value indicates that this ofproto_class does not
682 * support CFM, as does a null pointer. */
683 int (*set_cfm)(struct ofport *ofport, const struct cfm_settings *s);
685 /* Checks the fault status of CFM configured on 'ofport'. Returns 1 if CFM
686 * is faulted (generally indicating a connectivity problem), 0 if CFM is
687 * not faulted, or -1 if CFM is not enabled on 'port'
689 * This function may be a null pointer if the ofproto implementation does
690 * not support CFM. */
691 int (*get_cfm_fault)(const struct ofport *ofport);
693 /* If 's' is nonnull, this function registers a "bundle" associated with
694 * client data pointer 'aux' in 'ofproto'. A bundle is the same concept as
695 * a Port in OVSDB, that is, it consists of one or more "slave" devices
696 * (Interfaces, in OVSDB) along with VLAN and LACP configuration and, if
697 * there is more than one slave, a bonding configuration. If 'aux' is
698 * already registered then this function updates its configuration to 's'.
699 * Otherwise, this function registers a new bundle.
701 * If 's' is NULL, this function unregisters the bundle registered on
702 * 'ofproto' associated with client data pointer 'aux'. If no such bundle
703 * has been registered, this has no effect.
705 * This function affects only the behavior of the NXAST_AUTOPATH action and
706 * output to the OFPP_NORMAL port. An implementation that does not support
707 * it at all may set it to NULL or return EOPNOTSUPP. An implementation
708 * that supports only a subset of the functionality should implement what
709 * it can and return 0. */
710 int (*bundle_set)(struct ofproto *ofproto, void *aux,
711 const struct ofproto_bundle_settings *s);
713 /* If 'port' is part of any bundle, removes it from that bundle. If the
714 * bundle now has no ports, deletes the bundle. If the bundle now has only
715 * one port, deconfigures the bundle's bonding configuration. */
716 void (*bundle_remove)(struct ofport *ofport);
718 /* If 's' is nonnull, this function registers a mirror associated with
719 * client data pointer 'aux' in 'ofproto'. A mirror is the same concept as
720 * a Mirror in OVSDB. If 'aux' is already registered then this function
721 * updates its configuration to 's'. Otherwise, this function registers a
724 * If 's' is NULL, this function unregisters the mirror registered on
725 * 'ofproto' associated with client data pointer 'aux'. If no such mirror
726 * has been registered, this has no effect.
728 * This function affects only the behavior of the OFPP_NORMAL action. An
729 * implementation that does not support it at all may set it to NULL or
730 * return EOPNOTSUPP. An implementation that supports only a subset of the
731 * functionality should implement what it can and return 0. */
732 int (*mirror_set)(struct ofproto *ofproto, void *aux,
733 const struct ofproto_mirror_settings *s);
735 /* Configures the VLANs whose bits are set to 1 in 'flood_vlans' as VLANs
736 * on which all packets are flooded, instead of using MAC learning. If
737 * 'flood_vlans' is NULL, then MAC learning applies to all VLANs.
739 * This function affects only the behavior of the OFPP_NORMAL action. An
740 * implementation that does not support it may set it to NULL or return
742 int (*set_flood_vlans)(struct ofproto *ofproto,
743 unsigned long *flood_vlans);
745 /* Returns true if 'aux' is a registered bundle that is currently in use as
746 * the output for a mirror. */
747 bool (*is_mirror_output_bundle)(struct ofproto *ofproto, void *aux);
750 extern const struct ofproto_class ofproto_dpif_class;
752 int ofproto_class_register(const struct ofproto_class *);
753 int ofproto_class_unregister(const struct ofproto_class *);
755 void ofproto_add_flow(struct ofproto *, const struct cls_rule *,
756 const union ofp_action *, size_t n_actions);
757 void ofproto_delete_flow(struct ofproto *, const struct cls_rule *);
758 void ofproto_flush_flows(struct ofproto *);
760 #endif /* ofproto/private.h */