2 * Copyright (c) 2009, 2010 Nicira Networks.
3 * Copyright (c) 2010 Jean Tourrilhes - HP-Labs.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
22 #include <sys/socket.h>
24 #include <netinet/in.h>
27 #include "byte-order.h"
28 #include "classifier.h"
30 #include "discovery.h"
32 #include "dynamic-string.h"
33 #include "fail-open.h"
37 #include "mac-learning.h"
41 #include "ofp-print.h"
43 #include "ofproto-sflow.h"
45 #include "openflow/nicira-ext.h"
46 #include "openflow/openflow.h"
47 #include "openvswitch/datapath-protocol.h"
51 #include "poll-loop.h"
55 #include "stream-ssl.h"
63 VLOG_DEFINE_THIS_MODULE(ofproto
);
65 #include "sflow_api.h"
68 struct hmap_node hmap_node
; /* In struct ofproto's "ports" hmap. */
69 struct netdev
*netdev
;
70 struct ofp_phy_port opp
; /* In host byte order. */
74 static void ofport_free(struct ofport
*);
75 static void hton_ofp_phy_port(struct ofp_phy_port
*);
77 static int xlate_actions(const union ofp_action
*in
, size_t n_in
,
78 const struct flow
*, struct ofproto
*,
79 const struct ofpbuf
*packet
,
80 struct odp_actions
*out
, tag_type
*tags
,
81 bool *may_set_up_flow
, uint16_t *nf_output_iface
);
86 ovs_be64 flow_cookie
; /* Controller-issued identifier. */
87 uint16_t idle_timeout
; /* In seconds from time of last use. */
88 uint16_t hard_timeout
; /* In seconds from time of creation. */
89 bool send_flow_removed
; /* Send a flow removed message? */
90 long long int used
; /* Last-used time (0 if never used). */
91 long long int created
; /* Creation time. */
92 uint64_t packet_count
; /* Number of packets received. */
93 uint64_t byte_count
; /* Number of bytes received. */
94 uint64_t accounted_bytes
; /* Number of bytes passed to account_cb. */
95 tag_type tags
; /* Tags (set only by hooks). */
96 struct netflow_flow nf_flow
; /* Per-flow NetFlow tracking data. */
98 /* If 'super' is non-NULL, this rule is a subrule, that is, it is an
99 * exact-match rule (having cr.wc.wildcards of 0) generated from the
100 * wildcard rule 'super'. In this case, 'list' is an element of the
103 * If 'super' is NULL, this rule is a super-rule, and 'list' is the head of
104 * a list of subrules. A super-rule with no wildcards (where
105 * cr.wc.wildcards is 0) will never have any subrules. */
111 * 'n_actions' is the number of elements in the 'actions' array. A single
112 * action may take up more more than one element's worth of space.
114 * A subrule has no actions (it uses the super-rule's actions). */
116 union ofp_action
*actions
;
120 * A super-rule with wildcard fields never has ODP actions (since the
121 * datapath only supports exact-match flows). */
122 bool installed
; /* Installed in datapath? */
123 bool may_install
; /* True ordinarily; false if actions must
124 * be reassessed for every packet. */
126 union odp_action
*odp_actions
;
130 rule_is_hidden(const struct rule
*rule
)
132 /* Subrules are merely an implementation detail, so hide them from the
134 if (rule
->super
!= NULL
) {
138 /* Rules with priority higher than UINT16_MAX are set up by ofproto itself
139 * (e.g. by in-band control) and are intentionally hidden from the
141 if (rule
->cr
.priority
> UINT16_MAX
) {
148 static struct rule
*rule_create(struct ofproto
*, struct rule
*super
,
149 const union ofp_action
*, size_t n_actions
,
150 uint16_t idle_timeout
, uint16_t hard_timeout
,
151 ovs_be64 flow_cookie
, bool send_flow_removed
);
152 static void rule_free(struct rule
*);
153 static void rule_destroy(struct ofproto
*, struct rule
*);
154 static struct rule
*rule_from_cls_rule(const struct cls_rule
*);
155 static void rule_insert(struct ofproto
*, struct rule
*,
156 struct ofpbuf
*packet
, uint16_t in_port
);
157 static void rule_remove(struct ofproto
*, struct rule
*);
158 static bool rule_make_actions(struct ofproto
*, struct rule
*,
159 const struct ofpbuf
*packet
);
160 static void rule_install(struct ofproto
*, struct rule
*,
161 struct rule
*displaced_rule
);
162 static void rule_uninstall(struct ofproto
*, struct rule
*);
163 static void rule_post_uninstall(struct ofproto
*, struct rule
*);
164 static void send_flow_removed(struct ofproto
*p
, struct rule
*rule
,
165 long long int now
, uint8_t reason
);
167 /* ofproto supports two kinds of OpenFlow connections:
169 * - "Primary" connections to ordinary OpenFlow controllers. ofproto
170 * maintains persistent connections to these controllers and by default
171 * sends them asynchronous messages such as packet-ins.
173 * - "Service" connections, e.g. from ovs-ofctl. When these connections
174 * drop, it is the other side's responsibility to reconnect them if
175 * necessary. ofproto does not send them asynchronous messages by default.
177 * Currently, active (tcp, ssl, unix) connections are always "primary"
178 * connections and passive (ptcp, pssl, punix) connections are always "service"
179 * connections. There is no inherent reason for this, but it reflects the
183 OFCONN_PRIMARY
, /* An ordinary OpenFlow controller. */
184 OFCONN_SERVICE
/* A service connection, e.g. "ovs-ofctl". */
187 /* A listener for incoming OpenFlow "service" connections. */
189 struct hmap_node node
; /* In struct ofproto's "services" hmap. */
190 struct pvconn
*pvconn
; /* OpenFlow connection listener. */
192 /* These are not used by ofservice directly. They are settings for
193 * accepted "struct ofconn"s from the pvconn. */
194 int probe_interval
; /* Max idle time before probing, in seconds. */
195 int rate_limit
; /* Max packet-in rate in packets per second. */
196 int burst_limit
; /* Limit on accumulating packet credits. */
199 static struct ofservice
*ofservice_lookup(struct ofproto
*,
201 static int ofservice_create(struct ofproto
*,
202 const struct ofproto_controller
*);
203 static void ofservice_reconfigure(struct ofservice
*,
204 const struct ofproto_controller
*);
205 static void ofservice_destroy(struct ofproto
*, struct ofservice
*);
207 /* An OpenFlow connection. */
209 struct ofproto
*ofproto
; /* The ofproto that owns this connection. */
210 struct list node
; /* In struct ofproto's "all_conns" list. */
211 struct rconn
*rconn
; /* OpenFlow connection. */
212 enum ofconn_type type
; /* Type. */
213 int flow_format
; /* One of NXFF_*. */
215 /* OFPT_PACKET_IN related data. */
216 struct rconn_packet_counter
*packet_in_counter
; /* # queued on 'rconn'. */
217 struct pinsched
*schedulers
[2]; /* Indexed by reason code; see below. */
218 struct pktbuf
*pktbuf
; /* OpenFlow packet buffers. */
219 int miss_send_len
; /* Bytes to send of buffered packets. */
221 /* Number of OpenFlow messages queued on 'rconn' as replies to OpenFlow
222 * requests, and the maximum number before we stop reading OpenFlow
224 #define OFCONN_REPLY_MAX 100
225 struct rconn_packet_counter
*reply_counter
;
227 /* type == OFCONN_PRIMARY only. */
228 enum nx_role role
; /* Role. */
229 struct hmap_node hmap_node
; /* In struct ofproto's "controllers" map. */
230 struct discovery
*discovery
; /* Controller discovery object, if enabled. */
231 struct status_category
*ss
; /* Switch status category. */
232 enum ofproto_band band
; /* In-band or out-of-band? */
235 /* We use OFPR_NO_MATCH and OFPR_ACTION as indexes into struct ofconn's
236 * "schedulers" array. Their values are 0 and 1, and their meanings and values
237 * coincide with _ODPL_MISS_NR and _ODPL_ACTION_NR, so this is convenient. In
238 * case anything ever changes, check their values here. */
239 #define N_SCHEDULERS 2
240 BUILD_ASSERT_DECL(OFPR_NO_MATCH
== 0);
241 BUILD_ASSERT_DECL(OFPR_NO_MATCH
== _ODPL_MISS_NR
);
242 BUILD_ASSERT_DECL(OFPR_ACTION
== 1);
243 BUILD_ASSERT_DECL(OFPR_ACTION
== _ODPL_ACTION_NR
);
245 static struct ofconn
*ofconn_create(struct ofproto
*, struct rconn
*,
247 static void ofconn_destroy(struct ofconn
*);
248 static void ofconn_run(struct ofconn
*, struct ofproto
*);
249 static void ofconn_wait(struct ofconn
*);
250 static bool ofconn_receives_async_msgs(const struct ofconn
*);
251 static char *ofconn_make_name(const struct ofproto
*, const char *target
);
252 static void ofconn_set_rate_limit(struct ofconn
*, int rate
, int burst
);
254 static void queue_tx(struct ofpbuf
*msg
, const struct ofconn
*ofconn
,
255 struct rconn_packet_counter
*counter
);
257 static void send_packet_in(struct ofproto
*, struct ofpbuf
*odp_msg
);
258 static void do_send_packet_in(struct ofpbuf
*odp_msg
, void *ofconn
);
262 uint64_t datapath_id
; /* Datapath ID. */
263 uint64_t fallback_dpid
; /* Datapath ID if no better choice found. */
264 char *mfr_desc
; /* Manufacturer. */
265 char *hw_desc
; /* Hardware. */
266 char *sw_desc
; /* Software version. */
267 char *serial_desc
; /* Serial number. */
268 char *dp_desc
; /* Datapath description. */
272 struct netdev_monitor
*netdev_monitor
;
273 struct hmap ports
; /* Contains "struct ofport"s. */
274 struct shash port_by_name
;
278 struct switch_status
*switch_status
;
279 struct fail_open
*fail_open
;
280 struct netflow
*netflow
;
281 struct ofproto_sflow
*sflow
;
283 /* In-band control. */
284 struct in_band
*in_band
;
285 long long int next_in_band_update
;
286 struct sockaddr_in
*extra_in_band_remotes
;
287 size_t n_extra_remotes
;
290 struct classifier cls
;
291 bool need_revalidate
;
292 long long int next_expiration
;
293 struct tag_set revalidate_set
;
295 /* OpenFlow connections. */
296 struct hmap controllers
; /* Controller "struct ofconn"s. */
297 struct list all_conns
; /* Contains "struct ofconn"s. */
298 enum ofproto_fail_mode fail_mode
;
300 /* OpenFlow listeners. */
301 struct hmap services
; /* Contains "struct ofservice"s. */
302 struct pvconn
**snoops
;
305 /* Hooks for ovs-vswitchd. */
306 const struct ofhooks
*ofhooks
;
309 /* Used by default ofhooks. */
310 struct mac_learning
*ml
;
313 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 5);
315 static const struct ofhooks default_ofhooks
;
317 static uint64_t pick_datapath_id(const struct ofproto
*);
318 static uint64_t pick_fallback_dpid(void);
320 static int ofproto_expire(struct ofproto
*);
322 static void update_stats(struct ofproto
*, struct rule
*,
323 const struct odp_flow_stats
*);
324 static bool revalidate_rule(struct ofproto
*p
, struct rule
*rule
);
325 static void revalidate_cb(struct cls_rule
*rule_
, void *p_
);
327 static void handle_odp_msg(struct ofproto
*, struct ofpbuf
*);
329 static void handle_openflow(struct ofconn
*, struct ofproto
*,
332 static struct ofport
*get_port(const struct ofproto
*, uint16_t odp_port
);
333 static void update_port(struct ofproto
*, const char *devname
);
334 static int init_ports(struct ofproto
*);
335 static void reinit_ports(struct ofproto
*);
338 ofproto_create(const char *datapath
, const char *datapath_type
,
339 const struct ofhooks
*ofhooks
, void *aux
,
340 struct ofproto
**ofprotop
)
342 struct odp_stats stats
;
349 /* Connect to datapath and start listening for messages. */
350 error
= dpif_open(datapath
, datapath_type
, &dpif
);
352 VLOG_ERR("failed to open datapath %s: %s", datapath
, strerror(error
));
355 error
= dpif_get_dp_stats(dpif
, &stats
);
357 VLOG_ERR("failed to obtain stats for datapath %s: %s",
358 datapath
, strerror(error
));
362 error
= dpif_recv_set_mask(dpif
, ODPL_MISS
| ODPL_ACTION
| ODPL_SFLOW
);
364 VLOG_ERR("failed to listen on datapath %s: %s",
365 datapath
, strerror(error
));
369 dpif_flow_flush(dpif
);
370 dpif_recv_purge(dpif
);
372 /* Initialize settings. */
373 p
= xzalloc(sizeof *p
);
374 p
->fallback_dpid
= pick_fallback_dpid();
375 p
->datapath_id
= p
->fallback_dpid
;
376 p
->mfr_desc
= xstrdup(DEFAULT_MFR_DESC
);
377 p
->hw_desc
= xstrdup(DEFAULT_HW_DESC
);
378 p
->sw_desc
= xstrdup(DEFAULT_SW_DESC
);
379 p
->serial_desc
= xstrdup(DEFAULT_SERIAL_DESC
);
380 p
->dp_desc
= xstrdup(DEFAULT_DP_DESC
);
382 /* Initialize datapath. */
384 p
->netdev_monitor
= netdev_monitor_create();
385 hmap_init(&p
->ports
);
386 shash_init(&p
->port_by_name
);
387 p
->max_ports
= stats
.max_ports
;
389 /* Initialize submodules. */
390 p
->switch_status
= switch_status_create(p
);
396 /* Initialize flow table. */
397 classifier_init(&p
->cls
);
398 p
->need_revalidate
= false;
399 p
->next_expiration
= time_msec() + 1000;
400 tag_set_init(&p
->revalidate_set
);
402 /* Initialize OpenFlow connections. */
403 list_init(&p
->all_conns
);
404 hmap_init(&p
->controllers
);
405 hmap_init(&p
->services
);
409 /* Initialize hooks. */
411 p
->ofhooks
= ofhooks
;
415 p
->ofhooks
= &default_ofhooks
;
417 p
->ml
= mac_learning_create();
420 /* Pick final datapath ID. */
421 p
->datapath_id
= pick_datapath_id(p
);
422 VLOG_INFO("using datapath ID %016"PRIx64
, p
->datapath_id
);
429 ofproto_set_datapath_id(struct ofproto
*p
, uint64_t datapath_id
)
431 uint64_t old_dpid
= p
->datapath_id
;
432 p
->datapath_id
= datapath_id
? datapath_id
: pick_datapath_id(p
);
433 if (p
->datapath_id
!= old_dpid
) {
434 VLOG_INFO("datapath ID changed to %016"PRIx64
, p
->datapath_id
);
436 /* Force all active connections to reconnect, since there is no way to
437 * notify a controller that the datapath ID has changed. */
438 ofproto_reconnect_controllers(p
);
443 is_discovery_controller(const struct ofproto_controller
*c
)
445 return !strcmp(c
->target
, "discover");
449 is_in_band_controller(const struct ofproto_controller
*c
)
451 return is_discovery_controller(c
) || c
->band
== OFPROTO_IN_BAND
;
454 /* Creates a new controller in 'ofproto'. Some of the settings are initially
455 * drawn from 'c', but update_controller() needs to be called later to finish
456 * the new ofconn's configuration. */
458 add_controller(struct ofproto
*ofproto
, const struct ofproto_controller
*c
)
460 struct discovery
*discovery
;
461 struct ofconn
*ofconn
;
463 if (is_discovery_controller(c
)) {
464 int error
= discovery_create(c
->accept_re
, c
->update_resolv_conf
,
465 ofproto
->dpif
, ofproto
->switch_status
,
474 ofconn
= ofconn_create(ofproto
, rconn_create(5, 8), OFCONN_PRIMARY
);
475 ofconn
->pktbuf
= pktbuf_create();
476 ofconn
->miss_send_len
= OFP_DEFAULT_MISS_SEND_LEN
;
478 ofconn
->discovery
= discovery
;
480 char *name
= ofconn_make_name(ofproto
, c
->target
);
481 rconn_connect(ofconn
->rconn
, c
->target
, name
);
484 hmap_insert(&ofproto
->controllers
, &ofconn
->hmap_node
,
485 hash_string(c
->target
, 0));
488 /* Reconfigures 'ofconn' to match 'c'. This function cannot update an ofconn's
489 * target or turn discovery on or off (these are done by creating new ofconns
490 * and deleting old ones), but it can update the rest of an ofconn's
493 update_controller(struct ofconn
*ofconn
, const struct ofproto_controller
*c
)
497 ofconn
->band
= (is_in_band_controller(c
)
498 ? OFPROTO_IN_BAND
: OFPROTO_OUT_OF_BAND
);
500 rconn_set_max_backoff(ofconn
->rconn
, c
->max_backoff
);
502 probe_interval
= c
->probe_interval
? MAX(c
->probe_interval
, 5) : 0;
503 rconn_set_probe_interval(ofconn
->rconn
, probe_interval
);
505 if (ofconn
->discovery
) {
506 discovery_set_update_resolv_conf(ofconn
->discovery
,
507 c
->update_resolv_conf
);
508 discovery_set_accept_controller_re(ofconn
->discovery
, c
->accept_re
);
511 ofconn_set_rate_limit(ofconn
, c
->rate_limit
, c
->burst_limit
);
515 ofconn_get_target(const struct ofconn
*ofconn
)
517 return ofconn
->discovery
? "discover" : rconn_get_target(ofconn
->rconn
);
520 static struct ofconn
*
521 find_controller_by_target(struct ofproto
*ofproto
, const char *target
)
523 struct ofconn
*ofconn
;
525 HMAP_FOR_EACH_WITH_HASH (ofconn
, hmap_node
,
526 hash_string(target
, 0), &ofproto
->controllers
) {
527 if (!strcmp(ofconn_get_target(ofconn
), target
)) {
535 update_in_band_remotes(struct ofproto
*ofproto
)
537 const struct ofconn
*ofconn
;
538 struct sockaddr_in
*addrs
;
539 size_t max_addrs
, n_addrs
;
543 /* Allocate enough memory for as many remotes as we could possibly have. */
544 max_addrs
= ofproto
->n_extra_remotes
+ hmap_count(&ofproto
->controllers
);
545 addrs
= xmalloc(max_addrs
* sizeof *addrs
);
548 /* Add all the remotes. */
550 HMAP_FOR_EACH (ofconn
, hmap_node
, &ofproto
->controllers
) {
551 struct sockaddr_in
*sin
= &addrs
[n_addrs
];
553 if (ofconn
->band
== OFPROTO_OUT_OF_BAND
) {
557 sin
->sin_addr
.s_addr
= rconn_get_remote_ip(ofconn
->rconn
);
558 if (sin
->sin_addr
.s_addr
) {
559 sin
->sin_port
= rconn_get_remote_port(ofconn
->rconn
);
562 if (ofconn
->discovery
) {
566 for (i
= 0; i
< ofproto
->n_extra_remotes
; i
++) {
567 addrs
[n_addrs
++] = ofproto
->extra_in_band_remotes
[i
];
570 /* Create or update or destroy in-band.
572 * Ordinarily we only enable in-band if there's at least one remote
573 * address, but discovery needs the in-band rules for DHCP to be installed
574 * even before we know any remote addresses. */
575 if (n_addrs
|| discovery
) {
576 if (!ofproto
->in_band
) {
577 in_band_create(ofproto
, ofproto
->dpif
, ofproto
->switch_status
,
580 if (ofproto
->in_band
) {
581 in_band_set_remotes(ofproto
->in_band
, addrs
, n_addrs
);
583 ofproto
->next_in_band_update
= time_msec() + 1000;
585 in_band_destroy(ofproto
->in_band
);
586 ofproto
->in_band
= NULL
;
594 update_fail_open(struct ofproto
*p
)
596 struct ofconn
*ofconn
;
598 if (!hmap_is_empty(&p
->controllers
)
599 && p
->fail_mode
== OFPROTO_FAIL_STANDALONE
) {
600 struct rconn
**rconns
;
604 p
->fail_open
= fail_open_create(p
, p
->switch_status
);
608 rconns
= xmalloc(hmap_count(&p
->controllers
) * sizeof *rconns
);
609 HMAP_FOR_EACH (ofconn
, hmap_node
, &p
->controllers
) {
610 rconns
[n
++] = ofconn
->rconn
;
613 fail_open_set_controllers(p
->fail_open
, rconns
, n
);
614 /* p->fail_open takes ownership of 'rconns'. */
616 fail_open_destroy(p
->fail_open
);
622 ofproto_set_controllers(struct ofproto
*p
,
623 const struct ofproto_controller
*controllers
,
624 size_t n_controllers
)
626 struct shash new_controllers
;
627 struct ofconn
*ofconn
, *next_ofconn
;
628 struct ofservice
*ofservice
, *next_ofservice
;
632 /* Create newly configured controllers and services.
633 * Create a name to ofproto_controller mapping in 'new_controllers'. */
634 shash_init(&new_controllers
);
635 for (i
= 0; i
< n_controllers
; i
++) {
636 const struct ofproto_controller
*c
= &controllers
[i
];
638 if (!vconn_verify_name(c
->target
) || !strcmp(c
->target
, "discover")) {
639 if (!find_controller_by_target(p
, c
->target
)) {
640 add_controller(p
, c
);
642 } else if (!pvconn_verify_name(c
->target
)) {
643 if (!ofservice_lookup(p
, c
->target
) && ofservice_create(p
, c
)) {
647 VLOG_WARN_RL(&rl
, "%s: unsupported controller \"%s\"",
648 dpif_name(p
->dpif
), c
->target
);
652 shash_add_once(&new_controllers
, c
->target
, &controllers
[i
]);
655 /* Delete controllers that are no longer configured.
656 * Update configuration of all now-existing controllers. */
658 HMAP_FOR_EACH_SAFE (ofconn
, next_ofconn
, hmap_node
, &p
->controllers
) {
659 struct ofproto_controller
*c
;
661 c
= shash_find_data(&new_controllers
, ofconn_get_target(ofconn
));
663 ofconn_destroy(ofconn
);
665 update_controller(ofconn
, c
);
672 /* Delete services that are no longer configured.
673 * Update configuration of all now-existing services. */
674 HMAP_FOR_EACH_SAFE (ofservice
, next_ofservice
, node
, &p
->services
) {
675 struct ofproto_controller
*c
;
677 c
= shash_find_data(&new_controllers
,
678 pvconn_get_name(ofservice
->pvconn
));
680 ofservice_destroy(p
, ofservice
);
682 ofservice_reconfigure(ofservice
, c
);
686 shash_destroy(&new_controllers
);
688 update_in_band_remotes(p
);
691 if (!hmap_is_empty(&p
->controllers
) && !ss_exists
) {
692 ofconn
= CONTAINER_OF(hmap_first(&p
->controllers
),
693 struct ofconn
, hmap_node
);
694 ofconn
->ss
= switch_status_register(p
->switch_status
, "remote",
695 rconn_status_cb
, ofconn
->rconn
);
700 ofproto_set_fail_mode(struct ofproto
*p
, enum ofproto_fail_mode fail_mode
)
702 p
->fail_mode
= fail_mode
;
706 /* Drops the connections between 'ofproto' and all of its controllers, forcing
707 * them to reconnect. */
709 ofproto_reconnect_controllers(struct ofproto
*ofproto
)
711 struct ofconn
*ofconn
;
713 LIST_FOR_EACH (ofconn
, node
, &ofproto
->all_conns
) {
714 rconn_reconnect(ofconn
->rconn
);
719 any_extras_changed(const struct ofproto
*ofproto
,
720 const struct sockaddr_in
*extras
, size_t n
)
724 if (n
!= ofproto
->n_extra_remotes
) {
728 for (i
= 0; i
< n
; i
++) {
729 const struct sockaddr_in
*old
= &ofproto
->extra_in_band_remotes
[i
];
730 const struct sockaddr_in
*new = &extras
[i
];
732 if (old
->sin_addr
.s_addr
!= new->sin_addr
.s_addr
||
733 old
->sin_port
!= new->sin_port
) {
741 /* Sets the 'n' TCP port addresses in 'extras' as ones to which 'ofproto''s
742 * in-band control should guarantee access, in the same way that in-band
743 * control guarantees access to OpenFlow controllers. */
745 ofproto_set_extra_in_band_remotes(struct ofproto
*ofproto
,
746 const struct sockaddr_in
*extras
, size_t n
)
748 if (!any_extras_changed(ofproto
, extras
, n
)) {
752 free(ofproto
->extra_in_band_remotes
);
753 ofproto
->n_extra_remotes
= n
;
754 ofproto
->extra_in_band_remotes
= xmemdup(extras
, n
* sizeof *extras
);
756 update_in_band_remotes(ofproto
);
760 ofproto_set_desc(struct ofproto
*p
,
761 const char *mfr_desc
, const char *hw_desc
,
762 const char *sw_desc
, const char *serial_desc
,
765 struct ofp_desc_stats
*ods
;
768 if (strlen(mfr_desc
) >= sizeof ods
->mfr_desc
) {
769 VLOG_WARN("truncating mfr_desc, must be less than %zu characters",
770 sizeof ods
->mfr_desc
);
773 p
->mfr_desc
= xstrdup(mfr_desc
);
776 if (strlen(hw_desc
) >= sizeof ods
->hw_desc
) {
777 VLOG_WARN("truncating hw_desc, must be less than %zu characters",
778 sizeof ods
->hw_desc
);
781 p
->hw_desc
= xstrdup(hw_desc
);
784 if (strlen(sw_desc
) >= sizeof ods
->sw_desc
) {
785 VLOG_WARN("truncating sw_desc, must be less than %zu characters",
786 sizeof ods
->sw_desc
);
789 p
->sw_desc
= xstrdup(sw_desc
);
792 if (strlen(serial_desc
) >= sizeof ods
->serial_num
) {
793 VLOG_WARN("truncating serial_desc, must be less than %zu "
795 sizeof ods
->serial_num
);
797 free(p
->serial_desc
);
798 p
->serial_desc
= xstrdup(serial_desc
);
801 if (strlen(dp_desc
) >= sizeof ods
->dp_desc
) {
802 VLOG_WARN("truncating dp_desc, must be less than %zu characters",
803 sizeof ods
->dp_desc
);
806 p
->dp_desc
= xstrdup(dp_desc
);
811 set_pvconns(struct pvconn
***pvconnsp
, size_t *n_pvconnsp
,
812 const struct svec
*svec
)
814 struct pvconn
**pvconns
= *pvconnsp
;
815 size_t n_pvconns
= *n_pvconnsp
;
819 for (i
= 0; i
< n_pvconns
; i
++) {
820 pvconn_close(pvconns
[i
]);
824 pvconns
= xmalloc(svec
->n
* sizeof *pvconns
);
826 for (i
= 0; i
< svec
->n
; i
++) {
827 const char *name
= svec
->names
[i
];
828 struct pvconn
*pvconn
;
831 error
= pvconn_open(name
, &pvconn
);
833 pvconns
[n_pvconns
++] = pvconn
;
835 VLOG_ERR("failed to listen on %s: %s", name
, strerror(error
));
843 *n_pvconnsp
= n_pvconns
;
849 ofproto_set_snoops(struct ofproto
*ofproto
, const struct svec
*snoops
)
851 return set_pvconns(&ofproto
->snoops
, &ofproto
->n_snoops
, snoops
);
855 ofproto_set_netflow(struct ofproto
*ofproto
,
856 const struct netflow_options
*nf_options
)
858 if (nf_options
&& nf_options
->collectors
.n
) {
859 if (!ofproto
->netflow
) {
860 ofproto
->netflow
= netflow_create();
862 return netflow_set_options(ofproto
->netflow
, nf_options
);
864 netflow_destroy(ofproto
->netflow
);
865 ofproto
->netflow
= NULL
;
871 ofproto_set_sflow(struct ofproto
*ofproto
,
872 const struct ofproto_sflow_options
*oso
)
874 struct ofproto_sflow
*os
= ofproto
->sflow
;
877 struct ofport
*ofport
;
879 os
= ofproto
->sflow
= ofproto_sflow_create(ofproto
->dpif
);
880 HMAP_FOR_EACH (ofport
, hmap_node
, &ofproto
->ports
) {
881 ofproto_sflow_add_port(os
, ofport
->odp_port
,
882 netdev_get_name(ofport
->netdev
));
885 ofproto_sflow_set_options(os
, oso
);
887 ofproto_sflow_destroy(os
);
888 ofproto
->sflow
= NULL
;
893 ofproto_get_datapath_id(const struct ofproto
*ofproto
)
895 return ofproto
->datapath_id
;
899 ofproto_has_primary_controller(const struct ofproto
*ofproto
)
901 return !hmap_is_empty(&ofproto
->controllers
);
904 enum ofproto_fail_mode
905 ofproto_get_fail_mode(const struct ofproto
*p
)
911 ofproto_get_snoops(const struct ofproto
*ofproto
, struct svec
*snoops
)
915 for (i
= 0; i
< ofproto
->n_snoops
; i
++) {
916 svec_add(snoops
, pvconn_get_name(ofproto
->snoops
[i
]));
921 ofproto_destroy(struct ofproto
*p
)
923 struct ofservice
*ofservice
, *next_ofservice
;
924 struct ofconn
*ofconn
, *next_ofconn
;
925 struct ofport
*ofport
, *next_ofport
;
932 /* Destroy fail-open and in-band early, since they touch the classifier. */
933 fail_open_destroy(p
->fail_open
);
936 in_band_destroy(p
->in_band
);
938 free(p
->extra_in_band_remotes
);
940 ofproto_flush_flows(p
);
941 classifier_destroy(&p
->cls
);
943 LIST_FOR_EACH_SAFE (ofconn
, next_ofconn
, node
, &p
->all_conns
) {
944 ofconn_destroy(ofconn
);
946 hmap_destroy(&p
->controllers
);
949 netdev_monitor_destroy(p
->netdev_monitor
);
950 HMAP_FOR_EACH_SAFE (ofport
, next_ofport
, hmap_node
, &p
->ports
) {
951 hmap_remove(&p
->ports
, &ofport
->hmap_node
);
954 shash_destroy(&p
->port_by_name
);
956 switch_status_destroy(p
->switch_status
);
957 netflow_destroy(p
->netflow
);
958 ofproto_sflow_destroy(p
->sflow
);
960 HMAP_FOR_EACH_SAFE (ofservice
, next_ofservice
, node
, &p
->services
) {
961 ofservice_destroy(p
, ofservice
);
963 hmap_destroy(&p
->services
);
965 for (i
= 0; i
< p
->n_snoops
; i
++) {
966 pvconn_close(p
->snoops
[i
]);
970 mac_learning_destroy(p
->ml
);
975 free(p
->serial_desc
);
978 hmap_destroy(&p
->ports
);
984 ofproto_run(struct ofproto
*p
)
986 int error
= ofproto_run1(p
);
988 error
= ofproto_run2(p
, false);
994 process_port_change(struct ofproto
*ofproto
, int error
, char *devname
)
996 if (error
== ENOBUFS
) {
997 reinit_ports(ofproto
);
999 update_port(ofproto
, devname
);
1004 /* Returns a "preference level" for snooping 'ofconn'. A higher return value
1005 * means that 'ofconn' is more interesting for monitoring than a lower return
1008 snoop_preference(const struct ofconn
*ofconn
)
1010 switch (ofconn
->role
) {
1011 case NX_ROLE_MASTER
:
1018 /* Shouldn't happen. */
1023 /* One of ofproto's "snoop" pvconns has accepted a new connection on 'vconn'.
1024 * Connects this vconn to a controller. */
1026 add_snooper(struct ofproto
*ofproto
, struct vconn
*vconn
)
1028 struct ofconn
*ofconn
, *best
;
1030 /* Pick a controller for monitoring. */
1032 LIST_FOR_EACH (ofconn
, node
, &ofproto
->all_conns
) {
1033 if (ofconn
->type
== OFCONN_PRIMARY
1034 && (!best
|| snoop_preference(ofconn
) > snoop_preference(best
))) {
1040 rconn_add_monitor(best
->rconn
, vconn
);
1042 VLOG_INFO_RL(&rl
, "no controller connection to snoop");
1048 ofproto_run1(struct ofproto
*p
)
1050 struct ofconn
*ofconn
, *next_ofconn
;
1051 struct ofservice
*ofservice
;
1056 if (shash_is_empty(&p
->port_by_name
)) {
1060 for (i
= 0; i
< 50; i
++) {
1063 error
= dpif_recv(p
->dpif
, &buf
);
1065 if (error
== ENODEV
) {
1066 /* Someone destroyed the datapath behind our back. The caller
1067 * better destroy us and give up, because we're just going to
1068 * spin from here on out. */
1069 static struct vlog_rate_limit rl2
= VLOG_RATE_LIMIT_INIT(1, 5);
1070 VLOG_ERR_RL(&rl2
, "%s: datapath was destroyed externally",
1071 dpif_name(p
->dpif
));
1077 handle_odp_msg(p
, buf
);
1080 while ((error
= dpif_port_poll(p
->dpif
, &devname
)) != EAGAIN
) {
1081 process_port_change(p
, error
, devname
);
1083 while ((error
= netdev_monitor_poll(p
->netdev_monitor
,
1084 &devname
)) != EAGAIN
) {
1085 process_port_change(p
, error
, devname
);
1089 if (time_msec() >= p
->next_in_band_update
) {
1090 update_in_band_remotes(p
);
1092 in_band_run(p
->in_band
);
1095 LIST_FOR_EACH_SAFE (ofconn
, next_ofconn
, node
, &p
->all_conns
) {
1096 ofconn_run(ofconn
, p
);
1099 /* Fail-open maintenance. Do this after processing the ofconns since
1100 * fail-open checks the status of the controller rconn. */
1102 fail_open_run(p
->fail_open
);
1105 HMAP_FOR_EACH (ofservice
, node
, &p
->services
) {
1106 struct vconn
*vconn
;
1109 retval
= pvconn_accept(ofservice
->pvconn
, OFP_VERSION
, &vconn
);
1111 struct rconn
*rconn
;
1114 rconn
= rconn_create(ofservice
->probe_interval
, 0);
1115 name
= ofconn_make_name(p
, vconn_get_name(vconn
));
1116 rconn_connect_unreliably(rconn
, vconn
, name
);
1119 ofconn
= ofconn_create(p
, rconn
, OFCONN_SERVICE
);
1120 ofconn_set_rate_limit(ofconn
, ofservice
->rate_limit
,
1121 ofservice
->burst_limit
);
1122 } else if (retval
!= EAGAIN
) {
1123 VLOG_WARN_RL(&rl
, "accept failed (%s)", strerror(retval
));
1127 for (i
= 0; i
< p
->n_snoops
; i
++) {
1128 struct vconn
*vconn
;
1131 retval
= pvconn_accept(p
->snoops
[i
], OFP_VERSION
, &vconn
);
1133 add_snooper(p
, vconn
);
1134 } else if (retval
!= EAGAIN
) {
1135 VLOG_WARN_RL(&rl
, "accept failed (%s)", strerror(retval
));
1139 if (time_msec() >= p
->next_expiration
) {
1140 int delay
= ofproto_expire(p
);
1141 p
->next_expiration
= time_msec() + delay
;
1142 COVERAGE_INC(ofproto_expiration
);
1146 netflow_run(p
->netflow
);
1149 ofproto_sflow_run(p
->sflow
);
1155 struct revalidate_cbdata
{
1156 struct ofproto
*ofproto
;
1157 bool revalidate_all
; /* Revalidate all exact-match rules? */
1158 bool revalidate_subrules
; /* Revalidate all exact-match subrules? */
1159 struct tag_set revalidate_set
; /* Set of tags to revalidate. */
1163 ofproto_run2(struct ofproto
*p
, bool revalidate_all
)
1165 if (p
->need_revalidate
|| revalidate_all
1166 || !tag_set_is_empty(&p
->revalidate_set
)) {
1167 struct revalidate_cbdata cbdata
;
1169 cbdata
.revalidate_all
= revalidate_all
;
1170 cbdata
.revalidate_subrules
= p
->need_revalidate
;
1171 cbdata
.revalidate_set
= p
->revalidate_set
;
1172 tag_set_init(&p
->revalidate_set
);
1173 COVERAGE_INC(ofproto_revalidate
);
1174 classifier_for_each(&p
->cls
, CLS_INC_EXACT
, revalidate_cb
, &cbdata
);
1175 p
->need_revalidate
= false;
1182 ofproto_wait(struct ofproto
*p
)
1184 struct ofservice
*ofservice
;
1185 struct ofconn
*ofconn
;
1188 dpif_recv_wait(p
->dpif
);
1189 dpif_port_poll_wait(p
->dpif
);
1190 netdev_monitor_poll_wait(p
->netdev_monitor
);
1191 LIST_FOR_EACH (ofconn
, node
, &p
->all_conns
) {
1192 ofconn_wait(ofconn
);
1195 poll_timer_wait_until(p
->next_in_band_update
);
1196 in_band_wait(p
->in_band
);
1199 fail_open_wait(p
->fail_open
);
1202 ofproto_sflow_wait(p
->sflow
);
1204 if (!tag_set_is_empty(&p
->revalidate_set
)) {
1205 poll_immediate_wake();
1207 if (p
->need_revalidate
) {
1208 /* Shouldn't happen, but if it does just go around again. */
1209 VLOG_DBG_RL(&rl
, "need revalidate in ofproto_wait_cb()");
1210 poll_immediate_wake();
1211 } else if (p
->next_expiration
!= LLONG_MAX
) {
1212 poll_timer_wait_until(p
->next_expiration
);
1214 HMAP_FOR_EACH (ofservice
, node
, &p
->services
) {
1215 pvconn_wait(ofservice
->pvconn
);
1217 for (i
= 0; i
< p
->n_snoops
; i
++) {
1218 pvconn_wait(p
->snoops
[i
]);
1223 ofproto_revalidate(struct ofproto
*ofproto
, tag_type tag
)
1225 tag_set_add(&ofproto
->revalidate_set
, tag
);
1229 ofproto_get_revalidate_set(struct ofproto
*ofproto
)
1231 return &ofproto
->revalidate_set
;
1235 ofproto_is_alive(const struct ofproto
*p
)
1237 return !hmap_is_empty(&p
->controllers
);
1240 /* Deletes port number 'odp_port' from the datapath for 'ofproto'.
1242 * This is almost the same as calling dpif_port_del() directly on the
1243 * datapath, but it also makes 'ofproto' close its open netdev for the port
1244 * (if any). This makes it possible to create a new netdev of a different
1245 * type under the same name, which otherwise the netdev library would refuse
1246 * to do because of the conflict. (The netdev would eventually get closed on
1247 * the next trip through ofproto_run(), but this interface is more direct.)
1249 * Returns 0 if successful, otherwise a positive errno. */
1251 ofproto_port_del(struct ofproto
*ofproto
, uint16_t odp_port
)
1253 struct ofport
*ofport
= get_port(ofproto
, odp_port
);
1254 const char *name
= ofport
? (char *) ofport
->opp
.name
: "<unknown>";
1257 error
= dpif_port_del(ofproto
->dpif
, odp_port
);
1259 VLOG_ERR("%s: failed to remove port %"PRIu16
" (%s) interface (%s)",
1260 dpif_name(ofproto
->dpif
), odp_port
, name
, strerror(error
));
1261 } else if (ofport
) {
1262 /* 'name' is ofport->opp.name and update_port() is going to destroy
1263 * 'ofport'. Just in case update_port() refers to 'name' after it
1264 * destroys 'ofport', make a copy of it around the update_port()
1266 char *devname
= xstrdup(name
);
1267 update_port(ofproto
, devname
);
1273 /* Checks if 'ofproto' thinks 'odp_port' should be included in floods. Returns
1274 * true if 'odp_port' exists and should be included, false otherwise. */
1276 ofproto_port_is_floodable(struct ofproto
*ofproto
, uint16_t odp_port
)
1278 struct ofport
*ofport
= get_port(ofproto
, odp_port
);
1279 return ofport
&& !(ofport
->opp
.config
& OFPPC_NO_FLOOD
);
1283 ofproto_send_packet(struct ofproto
*p
, const struct flow
*flow
,
1284 const union ofp_action
*actions
, size_t n_actions
,
1285 const struct ofpbuf
*packet
)
1287 struct odp_actions odp_actions
;
1290 error
= xlate_actions(actions
, n_actions
, flow
, p
, packet
, &odp_actions
,
1296 /* XXX Should we translate the dpif_execute() errno value into an OpenFlow
1298 dpif_execute(p
->dpif
, odp_actions
.actions
, odp_actions
.n_actions
, packet
);
1303 ofproto_add_flow(struct ofproto
*p
, const struct flow
*flow
,
1304 uint32_t wildcards
, unsigned int priority
,
1305 const union ofp_action
*actions
, size_t n_actions
,
1309 rule
= rule_create(p
, NULL
, actions
, n_actions
,
1310 idle_timeout
>= 0 ? idle_timeout
: 5 /* XXX */,
1312 cls_rule_from_flow(flow
, wildcards
, priority
, &rule
->cr
);
1313 rule_insert(p
, rule
, NULL
, 0);
1317 ofproto_delete_flow(struct ofproto
*ofproto
, const struct flow
*flow
,
1318 uint32_t wildcards
, unsigned int priority
)
1320 struct cls_rule target
;
1323 cls_rule_from_flow(flow
, wildcards
, priority
, &target
);
1324 rule
= rule_from_cls_rule(classifier_find_rule_exactly(&ofproto
->cls
,
1327 rule_remove(ofproto
, rule
);
1332 destroy_rule(struct cls_rule
*rule_
, void *ofproto_
)
1334 struct rule
*rule
= rule_from_cls_rule(rule_
);
1335 struct ofproto
*ofproto
= ofproto_
;
1337 /* Mark the flow as not installed, even though it might really be
1338 * installed, so that rule_remove() doesn't bother trying to uninstall it.
1339 * There is no point in uninstalling it individually since we are about to
1340 * blow away all the flows with dpif_flow_flush(). */
1341 rule
->installed
= false;
1343 rule_remove(ofproto
, rule
);
1347 ofproto_flush_flows(struct ofproto
*ofproto
)
1349 COVERAGE_INC(ofproto_flush
);
1350 classifier_for_each(&ofproto
->cls
, CLS_INC_ALL
, destroy_rule
, ofproto
);
1351 dpif_flow_flush(ofproto
->dpif
);
1352 if (ofproto
->in_band
) {
1353 in_band_flushed(ofproto
->in_band
);
1355 if (ofproto
->fail_open
) {
1356 fail_open_flushed(ofproto
->fail_open
);
1361 reinit_ports(struct ofproto
*p
)
1363 struct svec devnames
;
1364 struct ofport
*ofport
;
1365 struct odp_port
*odp_ports
;
1369 COVERAGE_INC(ofproto_reinit_ports
);
1371 svec_init(&devnames
);
1372 HMAP_FOR_EACH (ofport
, hmap_node
, &p
->ports
) {
1373 svec_add (&devnames
, (char *) ofport
->opp
.name
);
1375 dpif_port_list(p
->dpif
, &odp_ports
, &n_odp_ports
);
1376 for (i
= 0; i
< n_odp_ports
; i
++) {
1377 svec_add (&devnames
, odp_ports
[i
].devname
);
1381 svec_sort_unique(&devnames
);
1382 for (i
= 0; i
< devnames
.n
; i
++) {
1383 update_port(p
, devnames
.names
[i
]);
1385 svec_destroy(&devnames
);
1388 static struct ofport
*
1389 make_ofport(const struct odp_port
*odp_port
)
1391 struct netdev_options netdev_options
;
1392 enum netdev_flags flags
;
1393 struct ofport
*ofport
;
1394 struct netdev
*netdev
;
1397 memset(&netdev_options
, 0, sizeof netdev_options
);
1398 netdev_options
.name
= odp_port
->devname
;
1399 netdev_options
.ethertype
= NETDEV_ETH_TYPE_NONE
;
1401 error
= netdev_open(&netdev_options
, &netdev
);
1403 VLOG_WARN_RL(&rl
, "ignoring port %s (%"PRIu16
") because netdev %s "
1404 "cannot be opened (%s)",
1405 odp_port
->devname
, odp_port
->port
,
1406 odp_port
->devname
, strerror(error
));
1410 ofport
= xmalloc(sizeof *ofport
);
1411 ofport
->netdev
= netdev
;
1412 ofport
->odp_port
= odp_port
->port
;
1413 ofport
->opp
.port_no
= odp_port_to_ofp_port(odp_port
->port
);
1414 netdev_get_etheraddr(netdev
, ofport
->opp
.hw_addr
);
1415 memcpy(ofport
->opp
.name
, odp_port
->devname
,
1416 MIN(sizeof ofport
->opp
.name
, sizeof odp_port
->devname
));
1417 ofport
->opp
.name
[sizeof ofport
->opp
.name
- 1] = '\0';
1419 netdev_get_flags(netdev
, &flags
);
1420 ofport
->opp
.config
= flags
& NETDEV_UP
? 0 : OFPPC_PORT_DOWN
;
1422 ofport
->opp
.state
= netdev_get_carrier(netdev
) ? 0 : OFPPS_LINK_DOWN
;
1424 netdev_get_features(netdev
,
1425 &ofport
->opp
.curr
, &ofport
->opp
.advertised
,
1426 &ofport
->opp
.supported
, &ofport
->opp
.peer
);
1431 ofport_conflicts(const struct ofproto
*p
, const struct odp_port
*odp_port
)
1433 if (get_port(p
, odp_port
->port
)) {
1434 VLOG_WARN_RL(&rl
, "ignoring duplicate port %"PRIu16
" in datapath",
1437 } else if (shash_find(&p
->port_by_name
, odp_port
->devname
)) {
1438 VLOG_WARN_RL(&rl
, "ignoring duplicate device %s in datapath",
1447 ofport_equal(const struct ofport
*a_
, const struct ofport
*b_
)
1449 const struct ofp_phy_port
*a
= &a_
->opp
;
1450 const struct ofp_phy_port
*b
= &b_
->opp
;
1452 BUILD_ASSERT_DECL(sizeof *a
== 48); /* Detect ofp_phy_port changes. */
1453 return (a
->port_no
== b
->port_no
1454 && !memcmp(a
->hw_addr
, b
->hw_addr
, sizeof a
->hw_addr
)
1455 && !strcmp((char *) a
->name
, (char *) b
->name
)
1456 && a
->state
== b
->state
1457 && a
->config
== b
->config
1458 && a
->curr
== b
->curr
1459 && a
->advertised
== b
->advertised
1460 && a
->supported
== b
->supported
1461 && a
->peer
== b
->peer
);
1465 send_port_status(struct ofproto
*p
, const struct ofport
*ofport
,
1468 /* XXX Should limit the number of queued port status change messages. */
1469 struct ofconn
*ofconn
;
1470 LIST_FOR_EACH (ofconn
, node
, &p
->all_conns
) {
1471 struct ofp_port_status
*ops
;
1474 if (!ofconn_receives_async_msgs(ofconn
)) {
1478 ops
= make_openflow_xid(sizeof *ops
, OFPT_PORT_STATUS
, 0, &b
);
1479 ops
->reason
= reason
;
1480 ops
->desc
= ofport
->opp
;
1481 hton_ofp_phy_port(&ops
->desc
);
1482 queue_tx(b
, ofconn
, NULL
);
1487 ofport_install(struct ofproto
*p
, struct ofport
*ofport
)
1489 const char *netdev_name
= (const char *) ofport
->opp
.name
;
1491 netdev_monitor_add(p
->netdev_monitor
, ofport
->netdev
);
1492 hmap_insert(&p
->ports
, &ofport
->hmap_node
, hash_int(ofport
->odp_port
, 0));
1493 shash_add(&p
->port_by_name
, netdev_name
, ofport
);
1495 ofproto_sflow_add_port(p
->sflow
, ofport
->odp_port
, netdev_name
);
1500 ofport_remove(struct ofproto
*p
, struct ofport
*ofport
)
1502 netdev_monitor_remove(p
->netdev_monitor
, ofport
->netdev
);
1503 hmap_remove(&p
->ports
, &ofport
->hmap_node
);
1504 shash_delete(&p
->port_by_name
,
1505 shash_find(&p
->port_by_name
, (char *) ofport
->opp
.name
));
1507 ofproto_sflow_del_port(p
->sflow
, ofport
->odp_port
);
1512 ofport_free(struct ofport
*ofport
)
1515 netdev_close(ofport
->netdev
);
1520 static struct ofport
*
1521 get_port(const struct ofproto
*ofproto
, uint16_t odp_port
)
1523 struct ofport
*port
;
1525 HMAP_FOR_EACH_IN_BUCKET (port
, hmap_node
,
1526 hash_int(odp_port
, 0), &ofproto
->ports
) {
1527 if (port
->odp_port
== odp_port
) {
1535 update_port(struct ofproto
*p
, const char *devname
)
1537 struct odp_port odp_port
;
1538 struct ofport
*old_ofport
;
1539 struct ofport
*new_ofport
;
1542 COVERAGE_INC(ofproto_update_port
);
1544 /* Query the datapath for port information. */
1545 error
= dpif_port_query_by_name(p
->dpif
, devname
, &odp_port
);
1547 /* Find the old ofport. */
1548 old_ofport
= shash_find_data(&p
->port_by_name
, devname
);
1551 /* There's no port named 'devname' but there might be a port with
1552 * the same port number. This could happen if a port is deleted
1553 * and then a new one added in its place very quickly, or if a port
1554 * is renamed. In the former case we want to send an OFPPR_DELETE
1555 * and an OFPPR_ADD, and in the latter case we want to send a
1556 * single OFPPR_MODIFY. We can distinguish the cases by comparing
1557 * the old port's ifindex against the new port, or perhaps less
1558 * reliably but more portably by comparing the old port's MAC
1559 * against the new port's MAC. However, this code isn't that smart
1560 * and always sends an OFPPR_MODIFY (XXX). */
1561 old_ofport
= get_port(p
, odp_port
.port
);
1563 } else if (error
!= ENOENT
&& error
!= ENODEV
) {
1564 VLOG_WARN_RL(&rl
, "dpif_port_query_by_name returned unexpected error "
1565 "%s", strerror(error
));
1569 /* Create a new ofport. */
1570 new_ofport
= !error
? make_ofport(&odp_port
) : NULL
;
1572 /* Eliminate a few pathological cases. */
1573 if (!old_ofport
&& !new_ofport
) {
1575 } else if (old_ofport
&& new_ofport
) {
1576 /* Most of the 'config' bits are OpenFlow soft state, but
1577 * OFPPC_PORT_DOWN is maintained the kernel. So transfer the OpenFlow
1578 * bits from old_ofport. (make_ofport() only sets OFPPC_PORT_DOWN and
1579 * leaves the other bits 0.) */
1580 new_ofport
->opp
.config
|= old_ofport
->opp
.config
& ~OFPPC_PORT_DOWN
;
1582 if (ofport_equal(old_ofport
, new_ofport
)) {
1583 /* False alarm--no change. */
1584 ofport_free(new_ofport
);
1589 /* Now deal with the normal cases. */
1591 ofport_remove(p
, old_ofport
);
1594 ofport_install(p
, new_ofport
);
1596 send_port_status(p
, new_ofport
? new_ofport
: old_ofport
,
1597 (!old_ofport
? OFPPR_ADD
1598 : !new_ofport
? OFPPR_DELETE
1600 ofport_free(old_ofport
);
1604 init_ports(struct ofproto
*p
)
1606 struct odp_port
*ports
;
1611 error
= dpif_port_list(p
->dpif
, &ports
, &n_ports
);
1616 for (i
= 0; i
< n_ports
; i
++) {
1617 const struct odp_port
*odp_port
= &ports
[i
];
1618 if (!ofport_conflicts(p
, odp_port
)) {
1619 struct ofport
*ofport
= make_ofport(odp_port
);
1621 ofport_install(p
, ofport
);
1629 static struct ofconn
*
1630 ofconn_create(struct ofproto
*p
, struct rconn
*rconn
, enum ofconn_type type
)
1632 struct ofconn
*ofconn
= xzalloc(sizeof *ofconn
);
1633 ofconn
->ofproto
= p
;
1634 list_push_back(&p
->all_conns
, &ofconn
->node
);
1635 ofconn
->rconn
= rconn
;
1636 ofconn
->type
= type
;
1637 ofconn
->flow_format
= NXFF_OPENFLOW10
;
1638 ofconn
->role
= NX_ROLE_OTHER
;
1639 ofconn
->packet_in_counter
= rconn_packet_counter_create ();
1640 ofconn
->pktbuf
= NULL
;
1641 ofconn
->miss_send_len
= 0;
1642 ofconn
->reply_counter
= rconn_packet_counter_create ();
1647 ofconn_destroy(struct ofconn
*ofconn
)
1649 if (ofconn
->type
== OFCONN_PRIMARY
) {
1650 hmap_remove(&ofconn
->ofproto
->controllers
, &ofconn
->hmap_node
);
1652 discovery_destroy(ofconn
->discovery
);
1654 list_remove(&ofconn
->node
);
1655 switch_status_unregister(ofconn
->ss
);
1656 rconn_destroy(ofconn
->rconn
);
1657 rconn_packet_counter_destroy(ofconn
->packet_in_counter
);
1658 rconn_packet_counter_destroy(ofconn
->reply_counter
);
1659 pktbuf_destroy(ofconn
->pktbuf
);
1664 ofconn_run(struct ofconn
*ofconn
, struct ofproto
*p
)
1669 if (ofconn
->discovery
) {
1670 char *controller_name
;
1671 if (rconn_is_connectivity_questionable(ofconn
->rconn
)) {
1672 discovery_question_connectivity(ofconn
->discovery
);
1674 if (discovery_run(ofconn
->discovery
, &controller_name
)) {
1675 if (controller_name
) {
1676 char *ofconn_name
= ofconn_make_name(p
, controller_name
);
1677 rconn_connect(ofconn
->rconn
, controller_name
, ofconn_name
);
1680 rconn_disconnect(ofconn
->rconn
);
1685 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1686 pinsched_run(ofconn
->schedulers
[i
], do_send_packet_in
, ofconn
);
1689 rconn_run(ofconn
->rconn
);
1691 if (rconn_packet_counter_read (ofconn
->reply_counter
) < OFCONN_REPLY_MAX
) {
1692 /* Limit the number of iterations to prevent other tasks from
1694 for (iteration
= 0; iteration
< 50; iteration
++) {
1695 struct ofpbuf
*of_msg
= rconn_recv(ofconn
->rconn
);
1700 fail_open_maybe_recover(p
->fail_open
);
1702 handle_openflow(ofconn
, p
, of_msg
);
1703 ofpbuf_delete(of_msg
);
1707 if (!ofconn
->discovery
&& !rconn_is_alive(ofconn
->rconn
)) {
1708 ofconn_destroy(ofconn
);
1713 ofconn_wait(struct ofconn
*ofconn
)
1717 if (ofconn
->discovery
) {
1718 discovery_wait(ofconn
->discovery
);
1720 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1721 pinsched_wait(ofconn
->schedulers
[i
]);
1723 rconn_run_wait(ofconn
->rconn
);
1724 if (rconn_packet_counter_read (ofconn
->reply_counter
) < OFCONN_REPLY_MAX
) {
1725 rconn_recv_wait(ofconn
->rconn
);
1727 COVERAGE_INC(ofproto_ofconn_stuck
);
1731 /* Returns true if 'ofconn' should receive asynchronous messages. */
1733 ofconn_receives_async_msgs(const struct ofconn
*ofconn
)
1735 if (ofconn
->type
== OFCONN_PRIMARY
) {
1736 /* Primary controllers always get asynchronous messages unless they
1737 * have configured themselves as "slaves". */
1738 return ofconn
->role
!= NX_ROLE_SLAVE
;
1740 /* Service connections don't get asynchronous messages unless they have
1741 * explicitly asked for them by setting a nonzero miss send length. */
1742 return ofconn
->miss_send_len
> 0;
1746 /* Returns a human-readable name for an OpenFlow connection between 'ofproto'
1747 * and 'target', suitable for use in log messages for identifying the
1750 * The name is dynamically allocated. The caller should free it (with free())
1751 * when it is no longer needed. */
1753 ofconn_make_name(const struct ofproto
*ofproto
, const char *target
)
1755 return xasprintf("%s<->%s", dpif_base_name(ofproto
->dpif
), target
);
1759 ofconn_set_rate_limit(struct ofconn
*ofconn
, int rate
, int burst
)
1763 for (i
= 0; i
< N_SCHEDULERS
; i
++) {
1764 struct pinsched
**s
= &ofconn
->schedulers
[i
];
1768 *s
= pinsched_create(rate
, burst
,
1769 ofconn
->ofproto
->switch_status
);
1771 pinsched_set_limits(*s
, rate
, burst
);
1774 pinsched_destroy(*s
);
1781 ofservice_reconfigure(struct ofservice
*ofservice
,
1782 const struct ofproto_controller
*c
)
1784 ofservice
->probe_interval
= c
->probe_interval
;
1785 ofservice
->rate_limit
= c
->rate_limit
;
1786 ofservice
->burst_limit
= c
->burst_limit
;
1789 /* Creates a new ofservice in 'ofproto'. Returns 0 if successful, otherwise a
1790 * positive errno value. */
1792 ofservice_create(struct ofproto
*ofproto
, const struct ofproto_controller
*c
)
1794 struct ofservice
*ofservice
;
1795 struct pvconn
*pvconn
;
1798 error
= pvconn_open(c
->target
, &pvconn
);
1803 ofservice
= xzalloc(sizeof *ofservice
);
1804 hmap_insert(&ofproto
->services
, &ofservice
->node
,
1805 hash_string(c
->target
, 0));
1806 ofservice
->pvconn
= pvconn
;
1808 ofservice_reconfigure(ofservice
, c
);
1814 ofservice_destroy(struct ofproto
*ofproto
, struct ofservice
*ofservice
)
1816 hmap_remove(&ofproto
->services
, &ofservice
->node
);
1817 pvconn_close(ofservice
->pvconn
);
1821 /* Finds and returns the ofservice within 'ofproto' that has the given
1822 * 'target', or a null pointer if none exists. */
1823 static struct ofservice
*
1824 ofservice_lookup(struct ofproto
*ofproto
, const char *target
)
1826 struct ofservice
*ofservice
;
1828 HMAP_FOR_EACH_WITH_HASH (ofservice
, node
, hash_string(target
, 0),
1829 &ofproto
->services
) {
1830 if (!strcmp(pvconn_get_name(ofservice
->pvconn
), target
)) {
1837 /* Caller is responsible for initializing the 'cr' member of the returned
1839 static struct rule
*
1840 rule_create(struct ofproto
*ofproto
, struct rule
*super
,
1841 const union ofp_action
*actions
, size_t n_actions
,
1842 uint16_t idle_timeout
, uint16_t hard_timeout
,
1843 ovs_be64 flow_cookie
, bool send_flow_removed
)
1845 struct rule
*rule
= xzalloc(sizeof *rule
);
1846 rule
->idle_timeout
= idle_timeout
;
1847 rule
->hard_timeout
= hard_timeout
;
1848 rule
->flow_cookie
= flow_cookie
;
1849 rule
->used
= rule
->created
= time_msec();
1850 rule
->send_flow_removed
= send_flow_removed
;
1851 rule
->super
= super
;
1853 list_push_back(&super
->list
, &rule
->list
);
1855 list_init(&rule
->list
);
1857 if (n_actions
> 0) {
1858 rule
->n_actions
= n_actions
;
1859 rule
->actions
= xmemdup(actions
, n_actions
* sizeof *actions
);
1861 netflow_flow_clear(&rule
->nf_flow
);
1862 netflow_flow_update_time(ofproto
->netflow
, &rule
->nf_flow
, rule
->created
);
1867 static struct rule
*
1868 rule_from_cls_rule(const struct cls_rule
*cls_rule
)
1870 return cls_rule
? CONTAINER_OF(cls_rule
, struct rule
, cr
) : NULL
;
1874 rule_free(struct rule
*rule
)
1876 free(rule
->actions
);
1877 free(rule
->odp_actions
);
1881 /* Destroys 'rule'. If 'rule' is a subrule, also removes it from its
1882 * super-rule's list of subrules. If 'rule' is a super-rule, also iterates
1883 * through all of its subrules and revalidates them, destroying any that no
1884 * longer has a super-rule (which is probably all of them).
1886 * Before calling this function, the caller must make have removed 'rule' from
1887 * the classifier. If 'rule' is an exact-match rule, the caller is also
1888 * responsible for ensuring that it has been uninstalled from the datapath. */
1890 rule_destroy(struct ofproto
*ofproto
, struct rule
*rule
)
1893 struct rule
*subrule
, *next
;
1894 LIST_FOR_EACH_SAFE (subrule
, next
, list
, &rule
->list
) {
1895 revalidate_rule(ofproto
, subrule
);
1898 list_remove(&rule
->list
);
1904 rule_has_out_port(const struct rule
*rule
, ovs_be16 out_port
)
1906 const union ofp_action
*oa
;
1907 struct actions_iterator i
;
1909 if (out_port
== htons(OFPP_NONE
)) {
1912 for (oa
= actions_first(&i
, rule
->actions
, rule
->n_actions
); oa
;
1913 oa
= actions_next(&i
)) {
1914 if (action_outputs_to_port(oa
, out_port
)) {
1921 /* Executes, within 'ofproto', the 'n_actions' actions in 'actions' on
1922 * 'packet', which arrived on 'in_port'.
1924 * Takes ownership of 'packet'. */
1926 execute_odp_actions(struct ofproto
*ofproto
, uint16_t in_port
,
1927 const union odp_action
*actions
, size_t n_actions
,
1928 struct ofpbuf
*packet
)
1930 if (n_actions
== 1 && actions
[0].type
== ODPAT_CONTROLLER
) {
1931 /* As an optimization, avoid a round-trip from userspace to kernel to
1932 * userspace. This also avoids possibly filling up kernel packet
1933 * buffers along the way. */
1934 struct odp_msg
*msg
;
1936 msg
= ofpbuf_push_uninit(packet
, sizeof *msg
);
1937 msg
->type
= _ODPL_ACTION_NR
;
1938 msg
->length
= sizeof(struct odp_msg
) + packet
->size
;
1939 msg
->port
= in_port
;
1941 msg
->arg
= actions
[0].controller
.arg
;
1943 send_packet_in(ofproto
, packet
);
1949 error
= dpif_execute(ofproto
->dpif
, actions
, n_actions
, packet
);
1950 ofpbuf_delete(packet
);
1955 /* Executes the actions indicated by 'rule' on 'packet', which is in flow
1956 * 'flow' and is considered to have arrived on ODP port 'in_port'. 'packet'
1957 * must have at least sizeof(struct ofp_packet_in) bytes of headroom.
1959 * The flow that 'packet' actually contains does not need to actually match
1960 * 'rule'; the actions in 'rule' will be applied to it either way. Likewise,
1961 * the packet and byte counters for 'rule' will be credited for the packet sent
1962 * out whether or not the packet actually matches 'rule'.
1964 * If 'rule' is an exact-match rule and 'flow' actually equals the rule's flow,
1965 * the caller must already have accurately composed ODP actions for it given
1966 * 'packet' using rule_make_actions(). If 'rule' is a wildcard rule, or if
1967 * 'rule' is an exact-match rule but 'flow' is not the rule's flow, then this
1968 * function will compose a set of ODP actions based on 'rule''s OpenFlow
1969 * actions and apply them to 'packet'.
1971 * Takes ownership of 'packet'. */
1973 rule_execute(struct ofproto
*ofproto
, struct rule
*rule
,
1974 struct ofpbuf
*packet
, const struct flow
*flow
)
1976 const union odp_action
*actions
;
1977 struct odp_flow_stats stats
;
1979 struct odp_actions a
;
1981 assert(ofpbuf_headroom(packet
) >= sizeof(struct ofp_packet_in
));
1983 /* Grab or compose the ODP actions.
1985 * The special case for an exact-match 'rule' where 'flow' is not the
1986 * rule's flow is important to avoid, e.g., sending a packet out its input
1987 * port simply because the ODP actions were composed for the wrong
1989 if (rule
->cr
.wc
.wildcards
|| !flow_equal(flow
, &rule
->cr
.flow
)) {
1990 struct rule
*super
= rule
->super
? rule
->super
: rule
;
1991 if (xlate_actions(super
->actions
, super
->n_actions
, flow
, ofproto
,
1992 packet
, &a
, NULL
, 0, NULL
)) {
1993 ofpbuf_delete(packet
);
1996 actions
= a
.actions
;
1997 n_actions
= a
.n_actions
;
1999 actions
= rule
->odp_actions
;
2000 n_actions
= rule
->n_odp_actions
;
2003 /* Execute the ODP actions. */
2004 flow_extract_stats(flow
, packet
, &stats
);
2005 if (execute_odp_actions(ofproto
, flow
->in_port
,
2006 actions
, n_actions
, packet
)) {
2007 update_stats(ofproto
, rule
, &stats
);
2008 rule
->used
= time_msec();
2009 netflow_flow_update_time(ofproto
->netflow
, &rule
->nf_flow
, rule
->used
);
2013 /* Inserts 'rule' into 'p''s flow table.
2015 * If 'packet' is nonnull, takes ownership of 'packet', executes 'rule''s
2016 * actions on it and credits the statistics for sending the packet to 'rule'.
2017 * 'packet' must have at least sizeof(struct ofp_packet_in) bytes of
2020 rule_insert(struct ofproto
*p
, struct rule
*rule
, struct ofpbuf
*packet
,
2023 struct rule
*displaced_rule
;
2025 /* Insert the rule in the classifier. */
2026 displaced_rule
= rule_from_cls_rule(classifier_insert(&p
->cls
, &rule
->cr
));
2027 if (!rule
->cr
.wc
.wildcards
) {
2028 rule_make_actions(p
, rule
, packet
);
2031 /* Send the packet and credit it to the rule. */
2034 flow_extract(packet
, 0, in_port
, &flow
);
2035 rule_execute(p
, rule
, packet
, &flow
);
2038 /* Install the rule in the datapath only after sending the packet, to
2039 * avoid packet reordering. */
2040 if (rule
->cr
.wc
.wildcards
) {
2041 COVERAGE_INC(ofproto_add_wc_flow
);
2042 p
->need_revalidate
= true;
2044 rule_install(p
, rule
, displaced_rule
);
2047 /* Free the rule that was displaced, if any. */
2048 if (displaced_rule
) {
2049 rule_destroy(p
, displaced_rule
);
2053 static struct rule
*
2054 rule_create_subrule(struct ofproto
*ofproto
, struct rule
*rule
,
2055 const struct flow
*flow
)
2057 struct rule
*subrule
= rule_create(ofproto
, rule
, NULL
, 0,
2058 rule
->idle_timeout
, rule
->hard_timeout
,
2060 COVERAGE_INC(ofproto_subrule_create
);
2061 cls_rule_from_flow(flow
, 0, (rule
->cr
.priority
<= UINT16_MAX
? UINT16_MAX
2062 : rule
->cr
.priority
), &subrule
->cr
);
2064 if (classifier_insert(&ofproto
->cls
, &subrule
->cr
)) {
2072 /* Remove 'rule' from 'ofproto' and free up the associated memory:
2074 * - If 'rule' was installed in the datapath, uninstalls it and updates
2075 * 'rule''s statistics (or its super-rule's statistics, if it is a
2076 * subrule), via rule_uninstall().
2078 * - Removes 'rule' from the classifier.
2080 * - If 'rule' is a super-rule that has subrules, revalidates (and possibly
2081 * uninstalls and destroys) its subrules, via rule_destroy().
2084 rule_remove(struct ofproto
*ofproto
, struct rule
*rule
)
2086 if (rule
->cr
.wc
.wildcards
) {
2087 COVERAGE_INC(ofproto_del_wc_flow
);
2088 ofproto
->need_revalidate
= true;
2090 rule_uninstall(ofproto
, rule
);
2092 classifier_remove(&ofproto
->cls
, &rule
->cr
);
2093 rule_destroy(ofproto
, rule
);
2096 /* Returns true if the actions changed, false otherwise. */
2098 rule_make_actions(struct ofproto
*p
, struct rule
*rule
,
2099 const struct ofpbuf
*packet
)
2101 const struct rule
*super
;
2102 struct odp_actions a
;
2105 assert(!rule
->cr
.wc
.wildcards
);
2107 super
= rule
->super
? rule
->super
: rule
;
2109 xlate_actions(super
->actions
, super
->n_actions
, &rule
->cr
.flow
, p
,
2110 packet
, &a
, &rule
->tags
, &rule
->may_install
,
2111 &rule
->nf_flow
.output_iface
);
2113 actions_len
= a
.n_actions
* sizeof *a
.actions
;
2114 if (rule
->n_odp_actions
!= a
.n_actions
2115 || memcmp(rule
->odp_actions
, a
.actions
, actions_len
)) {
2116 COVERAGE_INC(ofproto_odp_unchanged
);
2117 free(rule
->odp_actions
);
2118 rule
->n_odp_actions
= a
.n_actions
;
2119 rule
->odp_actions
= xmemdup(a
.actions
, actions_len
);
2127 do_put_flow(struct ofproto
*ofproto
, struct rule
*rule
, int flags
,
2128 struct odp_flow_put
*put
)
2130 memset(&put
->flow
.stats
, 0, sizeof put
->flow
.stats
);
2131 odp_flow_key_from_flow(&put
->flow
.key
, &rule
->cr
.flow
);
2132 put
->flow
.actions
= rule
->odp_actions
;
2133 put
->flow
.n_actions
= rule
->n_odp_actions
;
2134 put
->flow
.flags
= 0;
2136 return dpif_flow_put(ofproto
->dpif
, put
);
2140 rule_install(struct ofproto
*p
, struct rule
*rule
, struct rule
*displaced_rule
)
2142 assert(!rule
->cr
.wc
.wildcards
);
2144 if (rule
->may_install
) {
2145 struct odp_flow_put put
;
2146 if (!do_put_flow(p
, rule
,
2147 ODPPF_CREATE
| ODPPF_MODIFY
| ODPPF_ZERO_STATS
,
2149 rule
->installed
= true;
2150 if (displaced_rule
) {
2151 update_stats(p
, displaced_rule
, &put
.flow
.stats
);
2152 rule_post_uninstall(p
, displaced_rule
);
2155 } else if (displaced_rule
) {
2156 rule_uninstall(p
, displaced_rule
);
2161 rule_reinstall(struct ofproto
*ofproto
, struct rule
*rule
)
2163 if (rule
->installed
) {
2164 struct odp_flow_put put
;
2165 COVERAGE_INC(ofproto_dp_missed
);
2166 do_put_flow(ofproto
, rule
, ODPPF_CREATE
| ODPPF_MODIFY
, &put
);
2168 rule_install(ofproto
, rule
, NULL
);
2173 rule_update_actions(struct ofproto
*ofproto
, struct rule
*rule
)
2175 bool actions_changed
;
2176 uint16_t new_out_iface
, old_out_iface
;
2178 old_out_iface
= rule
->nf_flow
.output_iface
;
2179 actions_changed
= rule_make_actions(ofproto
, rule
, NULL
);
2181 if (rule
->may_install
) {
2182 if (rule
->installed
) {
2183 if (actions_changed
) {
2184 struct odp_flow_put put
;
2185 do_put_flow(ofproto
, rule
, ODPPF_CREATE
| ODPPF_MODIFY
2186 | ODPPF_ZERO_STATS
, &put
);
2187 update_stats(ofproto
, rule
, &put
.flow
.stats
);
2189 /* Temporarily set the old output iface so that NetFlow
2190 * messages have the correct output interface for the old
2192 new_out_iface
= rule
->nf_flow
.output_iface
;
2193 rule
->nf_flow
.output_iface
= old_out_iface
;
2194 rule_post_uninstall(ofproto
, rule
);
2195 rule
->nf_flow
.output_iface
= new_out_iface
;
2198 rule_install(ofproto
, rule
, NULL
);
2201 rule_uninstall(ofproto
, rule
);
2206 rule_account(struct ofproto
*ofproto
, struct rule
*rule
, uint64_t extra_bytes
)
2208 uint64_t total_bytes
= rule
->byte_count
+ extra_bytes
;
2210 if (ofproto
->ofhooks
->account_flow_cb
2211 && total_bytes
> rule
->accounted_bytes
)
2213 ofproto
->ofhooks
->account_flow_cb(
2214 &rule
->cr
.flow
, rule
->tags
, rule
->odp_actions
, rule
->n_odp_actions
,
2215 total_bytes
- rule
->accounted_bytes
, ofproto
->aux
);
2216 rule
->accounted_bytes
= total_bytes
;
2220 /* 'rule' must be an exact-match rule in 'p'.
2222 * If 'rule' is installed in the datapath, uninstalls it and updates's
2223 * statistics. If 'rule' is a subrule, the statistics that are updated are
2224 * actually its super-rule's statistics; otherwise 'rule''s own statistics are
2227 * If 'rule' is not installed, this function has no effect. */
2229 rule_uninstall(struct ofproto
*p
, struct rule
*rule
)
2231 assert(!rule
->cr
.wc
.wildcards
);
2232 if (rule
->installed
) {
2233 struct odp_flow odp_flow
;
2235 odp_flow_key_from_flow(&odp_flow
.key
, &rule
->cr
.flow
);
2236 odp_flow
.actions
= NULL
;
2237 odp_flow
.n_actions
= 0;
2239 if (!dpif_flow_del(p
->dpif
, &odp_flow
)) {
2240 update_stats(p
, rule
, &odp_flow
.stats
);
2242 rule
->installed
= false;
2244 rule_post_uninstall(p
, rule
);
2249 is_controller_rule(struct rule
*rule
)
2251 /* If the only action is send to the controller then don't report
2252 * NetFlow expiration messages since it is just part of the control
2253 * logic for the network and not real traffic. */
2257 && rule
->super
->n_actions
== 1
2258 && action_outputs_to_port(&rule
->super
->actions
[0],
2259 htons(OFPP_CONTROLLER
)));
2263 rule_post_uninstall(struct ofproto
*ofproto
, struct rule
*rule
)
2265 struct rule
*super
= rule
->super
;
2267 rule_account(ofproto
, rule
, 0);
2269 if (ofproto
->netflow
&& !is_controller_rule(rule
)) {
2270 struct ofexpired expired
;
2271 expired
.flow
= rule
->cr
.flow
;
2272 expired
.packet_count
= rule
->packet_count
;
2273 expired
.byte_count
= rule
->byte_count
;
2274 expired
.used
= rule
->used
;
2275 netflow_expire(ofproto
->netflow
, &rule
->nf_flow
, &expired
);
2278 super
->packet_count
+= rule
->packet_count
;
2279 super
->byte_count
+= rule
->byte_count
;
2281 /* Reset counters to prevent double counting if the rule ever gets
2283 rule
->packet_count
= 0;
2284 rule
->byte_count
= 0;
2285 rule
->accounted_bytes
= 0;
2287 netflow_flow_clear(&rule
->nf_flow
);
2292 queue_tx(struct ofpbuf
*msg
, const struct ofconn
*ofconn
,
2293 struct rconn_packet_counter
*counter
)
2295 update_openflow_length(msg
);
2296 if (rconn_send(ofconn
->rconn
, msg
, counter
)) {
2302 send_error_oh(const struct ofconn
*ofconn
, const struct ofp_header
*oh
,
2305 struct ofpbuf
*buf
= make_ofp_error_msg(error
, oh
);
2307 COVERAGE_INC(ofproto_error
);
2308 queue_tx(buf
, ofconn
, ofconn
->reply_counter
);
2313 hton_ofp_phy_port(struct ofp_phy_port
*opp
)
2315 opp
->port_no
= htons(opp
->port_no
);
2316 opp
->config
= htonl(opp
->config
);
2317 opp
->state
= htonl(opp
->state
);
2318 opp
->curr
= htonl(opp
->curr
);
2319 opp
->advertised
= htonl(opp
->advertised
);
2320 opp
->supported
= htonl(opp
->supported
);
2321 opp
->peer
= htonl(opp
->peer
);
2325 handle_echo_request(struct ofconn
*ofconn
, struct ofp_header
*oh
)
2327 struct ofp_header
*rq
= oh
;
2328 queue_tx(make_echo_reply(rq
), ofconn
, ofconn
->reply_counter
);
2333 handle_features_request(struct ofproto
*p
, struct ofconn
*ofconn
,
2334 struct ofp_header
*oh
)
2336 struct ofp_switch_features
*osf
;
2338 struct ofport
*port
;
2340 osf
= make_openflow_xid(sizeof *osf
, OFPT_FEATURES_REPLY
, oh
->xid
, &buf
);
2341 osf
->datapath_id
= htonll(p
->datapath_id
);
2342 osf
->n_buffers
= htonl(pktbuf_capacity());
2344 osf
->capabilities
= htonl(OFPC_FLOW_STATS
| OFPC_TABLE_STATS
|
2345 OFPC_PORT_STATS
| OFPC_ARP_MATCH_IP
);
2346 osf
->actions
= htonl((1u << OFPAT_OUTPUT
) |
2347 (1u << OFPAT_SET_VLAN_VID
) |
2348 (1u << OFPAT_SET_VLAN_PCP
) |
2349 (1u << OFPAT_STRIP_VLAN
) |
2350 (1u << OFPAT_SET_DL_SRC
) |
2351 (1u << OFPAT_SET_DL_DST
) |
2352 (1u << OFPAT_SET_NW_SRC
) |
2353 (1u << OFPAT_SET_NW_DST
) |
2354 (1u << OFPAT_SET_NW_TOS
) |
2355 (1u << OFPAT_SET_TP_SRC
) |
2356 (1u << OFPAT_SET_TP_DST
) |
2357 (1u << OFPAT_ENQUEUE
));
2359 HMAP_FOR_EACH (port
, hmap_node
, &p
->ports
) {
2360 hton_ofp_phy_port(ofpbuf_put(buf
, &port
->opp
, sizeof port
->opp
));
2363 queue_tx(buf
, ofconn
, ofconn
->reply_counter
);
2368 handle_get_config_request(struct ofproto
*p
, struct ofconn
*ofconn
,
2369 struct ofp_header
*oh
)
2372 struct ofp_switch_config
*osc
;
2376 /* Figure out flags. */
2377 dpif_get_drop_frags(p
->dpif
, &drop_frags
);
2378 flags
= drop_frags
? OFPC_FRAG_DROP
: OFPC_FRAG_NORMAL
;
2381 osc
= make_openflow_xid(sizeof *osc
, OFPT_GET_CONFIG_REPLY
, oh
->xid
, &buf
);
2382 osc
->flags
= htons(flags
);
2383 osc
->miss_send_len
= htons(ofconn
->miss_send_len
);
2384 queue_tx(buf
, ofconn
, ofconn
->reply_counter
);
2390 handle_set_config(struct ofproto
*p
, struct ofconn
*ofconn
,
2391 struct ofp_switch_config
*osc
)
2396 error
= check_ofp_message(&osc
->header
, OFPT_SET_CONFIG
, sizeof *osc
);
2400 flags
= ntohs(osc
->flags
);
2402 if (ofconn
->type
== OFCONN_PRIMARY
&& ofconn
->role
!= NX_ROLE_SLAVE
) {
2403 switch (flags
& OFPC_FRAG_MASK
) {
2404 case OFPC_FRAG_NORMAL
:
2405 dpif_set_drop_frags(p
->dpif
, false);
2407 case OFPC_FRAG_DROP
:
2408 dpif_set_drop_frags(p
->dpif
, true);
2411 VLOG_WARN_RL(&rl
, "requested bad fragment mode (flags=%"PRIx16
")",
2417 ofconn
->miss_send_len
= ntohs(osc
->miss_send_len
);
2423 add_controller_action(struct odp_actions
*actions
, uint16_t max_len
)
2425 union odp_action
*a
= odp_actions_add(actions
, ODPAT_CONTROLLER
);
2426 a
->controller
.arg
= max_len
;
2429 struct action_xlate_ctx
{
2431 struct flow flow
; /* Flow to which these actions correspond. */
2432 int recurse
; /* Recursion level, via xlate_table_action. */
2433 struct ofproto
*ofproto
;
2434 const struct ofpbuf
*packet
; /* The packet corresponding to 'flow', or a
2435 * null pointer if we are revalidating
2436 * without a packet to refer to. */
2439 struct odp_actions
*out
; /* Datapath actions. */
2440 tag_type
*tags
; /* Tags associated with OFPP_NORMAL actions. */
2441 bool may_set_up_flow
; /* True ordinarily; false if the actions must
2442 * be reassessed for every packet. */
2443 uint16_t nf_output_iface
; /* Output interface index for NetFlow. */
2446 /* Maximum depth of flow table recursion (due to NXAST_RESUBMIT actions) in a
2447 * flow translation. */
2448 #define MAX_RESUBMIT_RECURSION 8
2450 static void do_xlate_actions(const union ofp_action
*in
, size_t n_in
,
2451 struct action_xlate_ctx
*ctx
);
2454 add_output_action(struct action_xlate_ctx
*ctx
, uint16_t port
)
2456 const struct ofport
*ofport
= get_port(ctx
->ofproto
, port
);
2459 if (ofport
->opp
.config
& OFPPC_NO_FWD
) {
2460 /* Forwarding disabled on port. */
2465 * We don't have an ofport record for this port, but it doesn't hurt to
2466 * allow forwarding to it anyhow. Maybe such a port will appear later
2467 * and we're pre-populating the flow table.
2471 odp_actions_add(ctx
->out
, ODPAT_OUTPUT
)->output
.port
= port
;
2472 ctx
->nf_output_iface
= port
;
2475 static struct rule
*
2476 lookup_valid_rule(struct ofproto
*ofproto
, const struct flow
*flow
)
2479 rule
= rule_from_cls_rule(classifier_lookup(&ofproto
->cls
, flow
,
2482 /* The rule we found might not be valid, since we could be in need of
2483 * revalidation. If it is not valid, don't return it. */
2486 && ofproto
->need_revalidate
2487 && !revalidate_rule(ofproto
, rule
)) {
2488 COVERAGE_INC(ofproto_invalidated
);
2496 xlate_table_action(struct action_xlate_ctx
*ctx
, uint16_t in_port
)
2498 if (ctx
->recurse
< MAX_RESUBMIT_RECURSION
) {
2499 uint16_t old_in_port
;
2502 /* Look up a flow with 'in_port' as the input port. Then restore the
2503 * original input port (otherwise OFPP_NORMAL and OFPP_IN_PORT will
2504 * have surprising behavior). */
2505 old_in_port
= ctx
->flow
.in_port
;
2506 ctx
->flow
.in_port
= in_port
;
2507 rule
= lookup_valid_rule(ctx
->ofproto
, &ctx
->flow
);
2508 ctx
->flow
.in_port
= old_in_port
;
2516 do_xlate_actions(rule
->actions
, rule
->n_actions
, ctx
);
2520 struct vlog_rate_limit recurse_rl
= VLOG_RATE_LIMIT_INIT(1, 1);
2522 VLOG_ERR_RL(&recurse_rl
, "NXAST_RESUBMIT recursed over %d times",
2523 MAX_RESUBMIT_RECURSION
);
2528 flood_packets(struct ofproto
*ofproto
, uint16_t odp_in_port
, uint32_t mask
,
2529 uint16_t *nf_output_iface
, struct odp_actions
*actions
)
2531 struct ofport
*ofport
;
2533 HMAP_FOR_EACH (ofport
, hmap_node
, &ofproto
->ports
) {
2534 uint16_t odp_port
= ofport
->odp_port
;
2535 if (odp_port
!= odp_in_port
&& !(ofport
->opp
.config
& mask
)) {
2536 odp_actions_add(actions
, ODPAT_OUTPUT
)->output
.port
= odp_port
;
2539 *nf_output_iface
= NF_OUT_FLOOD
;
2543 xlate_output_action__(struct action_xlate_ctx
*ctx
,
2544 uint16_t port
, uint16_t max_len
)
2547 uint16_t prev_nf_output_iface
= ctx
->nf_output_iface
;
2549 ctx
->nf_output_iface
= NF_OUT_DROP
;
2553 add_output_action(ctx
, ctx
->flow
.in_port
);
2556 xlate_table_action(ctx
, ctx
->flow
.in_port
);
2559 if (!ctx
->ofproto
->ofhooks
->normal_cb(&ctx
->flow
, ctx
->packet
,
2560 ctx
->out
, ctx
->tags
,
2561 &ctx
->nf_output_iface
,
2562 ctx
->ofproto
->aux
)) {
2563 COVERAGE_INC(ofproto_uninstallable
);
2564 ctx
->may_set_up_flow
= false;
2568 flood_packets(ctx
->ofproto
, ctx
->flow
.in_port
, OFPPC_NO_FLOOD
,
2569 &ctx
->nf_output_iface
, ctx
->out
);
2572 flood_packets(ctx
->ofproto
, ctx
->flow
.in_port
, 0,
2573 &ctx
->nf_output_iface
, ctx
->out
);
2575 case OFPP_CONTROLLER
:
2576 add_controller_action(ctx
->out
, max_len
);
2579 add_output_action(ctx
, ODPP_LOCAL
);
2582 odp_port
= ofp_port_to_odp_port(port
);
2583 if (odp_port
!= ctx
->flow
.in_port
) {
2584 add_output_action(ctx
, odp_port
);
2589 if (prev_nf_output_iface
== NF_OUT_FLOOD
) {
2590 ctx
->nf_output_iface
= NF_OUT_FLOOD
;
2591 } else if (ctx
->nf_output_iface
== NF_OUT_DROP
) {
2592 ctx
->nf_output_iface
= prev_nf_output_iface
;
2593 } else if (prev_nf_output_iface
!= NF_OUT_DROP
&&
2594 ctx
->nf_output_iface
!= NF_OUT_FLOOD
) {
2595 ctx
->nf_output_iface
= NF_OUT_MULTI
;
2600 xlate_output_action(struct action_xlate_ctx
*ctx
,
2601 const struct ofp_action_output
*oao
)
2603 xlate_output_action__(ctx
, ntohs(oao
->port
), ntohs(oao
->max_len
));
2606 /* If the final ODP action in 'ctx' is "pop priority", drop it, as an
2607 * optimization, because we're going to add another action that sets the
2608 * priority immediately after, or because there are no actions following the
2611 remove_pop_action(struct action_xlate_ctx
*ctx
)
2613 size_t n
= ctx
->out
->n_actions
;
2614 if (n
> 0 && ctx
->out
->actions
[n
- 1].type
== ODPAT_POP_PRIORITY
) {
2615 ctx
->out
->n_actions
--;
2620 xlate_enqueue_action(struct action_xlate_ctx
*ctx
,
2621 const struct ofp_action_enqueue
*oae
)
2623 uint16_t ofp_port
, odp_port
;
2627 error
= dpif_queue_to_priority(ctx
->ofproto
->dpif
, ntohl(oae
->queue_id
),
2630 /* Fall back to ordinary output action. */
2631 xlate_output_action__(ctx
, ntohs(oae
->port
), 0);
2635 /* Figure out ODP output port. */
2636 ofp_port
= ntohs(oae
->port
);
2637 if (ofp_port
!= OFPP_IN_PORT
) {
2638 odp_port
= ofp_port_to_odp_port(ofp_port
);
2640 odp_port
= ctx
->flow
.in_port
;
2643 /* Add ODP actions. */
2644 remove_pop_action(ctx
);
2645 odp_actions_add(ctx
->out
, ODPAT_SET_PRIORITY
)->priority
.priority
2647 add_output_action(ctx
, odp_port
);
2648 odp_actions_add(ctx
->out
, ODPAT_POP_PRIORITY
);
2650 /* Update NetFlow output port. */
2651 if (ctx
->nf_output_iface
== NF_OUT_DROP
) {
2652 ctx
->nf_output_iface
= odp_port
;
2653 } else if (ctx
->nf_output_iface
!= NF_OUT_FLOOD
) {
2654 ctx
->nf_output_iface
= NF_OUT_MULTI
;
2659 xlate_set_queue_action(struct action_xlate_ctx
*ctx
,
2660 const struct nx_action_set_queue
*nasq
)
2665 error
= dpif_queue_to_priority(ctx
->ofproto
->dpif
, ntohl(nasq
->queue_id
),
2668 /* Couldn't translate queue to a priority, so ignore. A warning
2669 * has already been logged. */
2673 remove_pop_action(ctx
);
2674 odp_actions_add(ctx
->out
, ODPAT_SET_PRIORITY
)->priority
.priority
2679 xlate_nicira_action(struct action_xlate_ctx
*ctx
,
2680 const struct nx_action_header
*nah
)
2682 const struct nx_action_resubmit
*nar
;
2683 const struct nx_action_set_tunnel
*nast
;
2684 const struct nx_action_set_queue
*nasq
;
2685 union odp_action
*oa
;
2686 int subtype
= ntohs(nah
->subtype
);
2688 assert(nah
->vendor
== htonl(NX_VENDOR_ID
));
2690 case NXAST_RESUBMIT
:
2691 nar
= (const struct nx_action_resubmit
*) nah
;
2692 xlate_table_action(ctx
, ofp_port_to_odp_port(ntohs(nar
->in_port
)));
2695 case NXAST_SET_TUNNEL
:
2696 nast
= (const struct nx_action_set_tunnel
*) nah
;
2697 oa
= odp_actions_add(ctx
->out
, ODPAT_SET_TUNNEL
);
2698 ctx
->flow
.tun_id
= oa
->tunnel
.tun_id
= nast
->tun_id
;
2701 case NXAST_DROP_SPOOFED_ARP
:
2702 if (ctx
->flow
.dl_type
== htons(ETH_TYPE_ARP
)) {
2703 odp_actions_add(ctx
->out
, ODPAT_DROP_SPOOFED_ARP
);
2707 case NXAST_SET_QUEUE
:
2708 nasq
= (const struct nx_action_set_queue
*) nah
;
2709 xlate_set_queue_action(ctx
, nasq
);
2712 case NXAST_POP_QUEUE
:
2713 odp_actions_add(ctx
->out
, ODPAT_POP_PRIORITY
);
2716 /* If you add a new action here that modifies flow data, don't forget to
2717 * update the flow key in ctx->flow at the same time. */
2720 VLOG_DBG_RL(&rl
, "unknown Nicira action type %"PRIu16
, subtype
);
2726 do_xlate_actions(const union ofp_action
*in
, size_t n_in
,
2727 struct action_xlate_ctx
*ctx
)
2729 struct actions_iterator iter
;
2730 const union ofp_action
*ia
;
2731 const struct ofport
*port
;
2733 port
= get_port(ctx
->ofproto
, ctx
->flow
.in_port
);
2734 if (port
&& port
->opp
.config
& (OFPPC_NO_RECV
| OFPPC_NO_RECV_STP
) &&
2735 port
->opp
.config
& (eth_addr_equals(ctx
->flow
.dl_dst
, eth_addr_stp
)
2736 ? OFPPC_NO_RECV_STP
: OFPPC_NO_RECV
)) {
2737 /* Drop this flow. */
2741 for (ia
= actions_first(&iter
, in
, n_in
); ia
; ia
= actions_next(&iter
)) {
2742 uint16_t type
= ntohs(ia
->type
);
2743 union odp_action
*oa
;
2747 xlate_output_action(ctx
, &ia
->output
);
2750 case OFPAT_SET_VLAN_VID
:
2751 oa
= odp_actions_add(ctx
->out
, ODPAT_SET_DL_TCI
);
2752 oa
->dl_tci
.tci
= ia
->vlan_vid
.vlan_vid
;
2753 oa
->dl_tci
.tci
|= htons(ctx
->flow
.dl_vlan_pcp
<< VLAN_PCP_SHIFT
);
2754 ctx
->flow
.dl_vlan
= ia
->vlan_vid
.vlan_vid
;
2757 case OFPAT_SET_VLAN_PCP
:
2758 oa
= odp_actions_add(ctx
->out
, ODPAT_SET_DL_TCI
);
2759 oa
->dl_tci
.tci
= htons(ia
->vlan_pcp
.vlan_pcp
<< VLAN_PCP_SHIFT
);
2760 oa
->dl_tci
.tci
|= ctx
->flow
.dl_vlan
;
2761 ctx
->flow
.dl_vlan_pcp
= ia
->vlan_pcp
.vlan_pcp
;
2764 case OFPAT_STRIP_VLAN
:
2765 odp_actions_add(ctx
->out
, ODPAT_STRIP_VLAN
);
2766 ctx
->flow
.dl_vlan
= htons(OFP_VLAN_NONE
);
2767 ctx
->flow
.dl_vlan_pcp
= 0;
2770 case OFPAT_SET_DL_SRC
:
2771 oa
= odp_actions_add(ctx
->out
, ODPAT_SET_DL_SRC
);
2772 memcpy(oa
->dl_addr
.dl_addr
,
2773 ((struct ofp_action_dl_addr
*) ia
)->dl_addr
, ETH_ADDR_LEN
);
2774 memcpy(ctx
->flow
.dl_src
,
2775 ((struct ofp_action_dl_addr
*) ia
)->dl_addr
, ETH_ADDR_LEN
);
2778 case OFPAT_SET_DL_DST
:
2779 oa
= odp_actions_add(ctx
->out
, ODPAT_SET_DL_DST
);
2780 memcpy(oa
->dl_addr
.dl_addr
,
2781 ((struct ofp_action_dl_addr
*) ia
)->dl_addr
, ETH_ADDR_LEN
);
2782 memcpy(ctx
->flow
.dl_dst
,
2783 ((struct ofp_action_dl_addr
*) ia
)->dl_addr
, ETH_ADDR_LEN
);
2786 case OFPAT_SET_NW_SRC
:
2787 oa
= odp_actions_add(ctx
->out
, ODPAT_SET_NW_SRC
);
2788 ctx
->flow
.nw_src
= oa
->nw_addr
.nw_addr
= ia
->nw_addr
.nw_addr
;
2791 case OFPAT_SET_NW_DST
:
2792 oa
= odp_actions_add(ctx
->out
, ODPAT_SET_NW_DST
);
2793 ctx
->flow
.nw_dst
= oa
->nw_addr
.nw_addr
= ia
->nw_addr
.nw_addr
;
2796 case OFPAT_SET_NW_TOS
:
2797 oa
= odp_actions_add(ctx
->out
, ODPAT_SET_NW_TOS
);
2798 ctx
->flow
.nw_tos
= oa
->nw_tos
.nw_tos
= ia
->nw_tos
.nw_tos
;
2801 case OFPAT_SET_TP_SRC
:
2802 oa
= odp_actions_add(ctx
->out
, ODPAT_SET_TP_SRC
);
2803 ctx
->flow
.tp_src
= oa
->tp_port
.tp_port
= ia
->tp_port
.tp_port
;
2806 case OFPAT_SET_TP_DST
:
2807 oa
= odp_actions_add(ctx
->out
, ODPAT_SET_TP_DST
);
2808 ctx
->flow
.tp_dst
= oa
->tp_port
.tp_port
= ia
->tp_port
.tp_port
;
2812 xlate_nicira_action(ctx
, (const struct nx_action_header
*) ia
);
2816 xlate_enqueue_action(ctx
, (const struct ofp_action_enqueue
*) ia
);
2820 VLOG_DBG_RL(&rl
, "unknown action type %"PRIu16
, type
);
2827 xlate_actions(const union ofp_action
*in
, size_t n_in
,
2828 const struct flow
*flow
, struct ofproto
*ofproto
,
2829 const struct ofpbuf
*packet
,
2830 struct odp_actions
*out
, tag_type
*tags
, bool *may_set_up_flow
,
2831 uint16_t *nf_output_iface
)
2833 tag_type no_tags
= 0;
2834 struct action_xlate_ctx ctx
;
2835 COVERAGE_INC(ofproto_ofp2odp
);
2836 odp_actions_init(out
);
2839 ctx
.ofproto
= ofproto
;
2840 ctx
.packet
= packet
;
2842 ctx
.tags
= tags
? tags
: &no_tags
;
2843 ctx
.may_set_up_flow
= true;
2844 ctx
.nf_output_iface
= NF_OUT_DROP
;
2845 do_xlate_actions(in
, n_in
, &ctx
);
2846 remove_pop_action(&ctx
);
2848 /* Check with in-band control to see if we're allowed to set up this
2850 if (!in_band_rule_check(ofproto
->in_band
, flow
, out
)) {
2851 ctx
.may_set_up_flow
= false;
2854 if (may_set_up_flow
) {
2855 *may_set_up_flow
= ctx
.may_set_up_flow
;
2857 if (nf_output_iface
) {
2858 *nf_output_iface
= ctx
.nf_output_iface
;
2860 if (odp_actions_overflow(out
)) {
2861 COVERAGE_INC(odp_overflow
);
2862 odp_actions_init(out
);
2863 return ofp_mkerr(OFPET_BAD_ACTION
, OFPBAC_TOO_MANY
);
2868 /* Checks whether 'ofconn' is a slave controller. If so, returns an OpenFlow
2869 * error message code (composed with ofp_mkerr()) for the caller to propagate
2870 * upward. Otherwise, returns 0.
2872 * 'oh' is used to make log messages more informative. */
2874 reject_slave_controller(struct ofconn
*ofconn
, const struct ofp_header
*oh
)
2876 if (ofconn
->type
== OFCONN_PRIMARY
&& ofconn
->role
== NX_ROLE_SLAVE
) {
2877 static struct vlog_rate_limit perm_rl
= VLOG_RATE_LIMIT_INIT(1, 5);
2880 type_name
= ofp_message_type_to_string(oh
->type
);
2881 VLOG_WARN_RL(&perm_rl
, "rejecting %s message from slave controller",
2885 return ofp_mkerr(OFPET_BAD_REQUEST
, OFPBRC_EPERM
);
2892 handle_packet_out(struct ofproto
*p
, struct ofconn
*ofconn
,
2893 struct ofp_header
*oh
)
2895 struct ofp_packet_out
*opo
;
2896 struct ofpbuf payload
, *buffer
;
2897 struct odp_actions actions
;
2903 error
= reject_slave_controller(ofconn
, oh
);
2908 error
= check_ofp_packet_out(oh
, &payload
, &n_actions
, p
->max_ports
);
2912 opo
= (struct ofp_packet_out
*) oh
;
2914 COVERAGE_INC(ofproto_packet_out
);
2915 if (opo
->buffer_id
!= htonl(UINT32_MAX
)) {
2916 error
= pktbuf_retrieve(ofconn
->pktbuf
, ntohl(opo
->buffer_id
),
2918 if (error
|| !buffer
) {
2926 flow_extract(&payload
, 0, ofp_port_to_odp_port(ntohs(opo
->in_port
)), &flow
);
2927 error
= xlate_actions((const union ofp_action
*) opo
->actions
, n_actions
,
2928 &flow
, p
, &payload
, &actions
, NULL
, NULL
, NULL
);
2930 dpif_execute(p
->dpif
, actions
.actions
, actions
.n_actions
, &payload
);
2932 ofpbuf_delete(buffer
);
2938 update_port_config(struct ofproto
*p
, struct ofport
*port
,
2939 uint32_t config
, uint32_t mask
)
2941 mask
&= config
^ port
->opp
.config
;
2942 if (mask
& OFPPC_PORT_DOWN
) {
2943 if (config
& OFPPC_PORT_DOWN
) {
2944 netdev_turn_flags_off(port
->netdev
, NETDEV_UP
, true);
2946 netdev_turn_flags_on(port
->netdev
, NETDEV_UP
, true);
2949 #define REVALIDATE_BITS (OFPPC_NO_RECV | OFPPC_NO_RECV_STP | \
2950 OFPPC_NO_FWD | OFPPC_NO_FLOOD)
2951 if (mask
& REVALIDATE_BITS
) {
2952 COVERAGE_INC(ofproto_costly_flags
);
2953 port
->opp
.config
^= mask
& REVALIDATE_BITS
;
2954 p
->need_revalidate
= true;
2956 #undef REVALIDATE_BITS
2957 if (mask
& OFPPC_NO_PACKET_IN
) {
2958 port
->opp
.config
^= OFPPC_NO_PACKET_IN
;
2963 handle_port_mod(struct ofproto
*p
, struct ofconn
*ofconn
,
2964 struct ofp_header
*oh
)
2966 const struct ofp_port_mod
*opm
;
2967 struct ofport
*port
;
2970 error
= reject_slave_controller(ofconn
, oh
);
2974 error
= check_ofp_message(oh
, OFPT_PORT_MOD
, sizeof *opm
);
2978 opm
= (struct ofp_port_mod
*) oh
;
2980 port
= get_port(p
, ofp_port_to_odp_port(ntohs(opm
->port_no
)));
2982 return ofp_mkerr(OFPET_PORT_MOD_FAILED
, OFPPMFC_BAD_PORT
);
2983 } else if (memcmp(port
->opp
.hw_addr
, opm
->hw_addr
, OFP_ETH_ALEN
)) {
2984 return ofp_mkerr(OFPET_PORT_MOD_FAILED
, OFPPMFC_BAD_HW_ADDR
);
2986 update_port_config(p
, port
, ntohl(opm
->config
), ntohl(opm
->mask
));
2987 if (opm
->advertise
) {
2988 netdev_set_advertisements(port
->netdev
, ntohl(opm
->advertise
));
2994 static struct ofpbuf
*
2995 make_stats_reply(ovs_be32 xid
, ovs_be16 type
, size_t body_len
)
2997 struct ofp_stats_reply
*osr
;
3000 msg
= ofpbuf_new(MIN(sizeof *osr
+ body_len
, UINT16_MAX
));
3001 osr
= put_openflow_xid(sizeof *osr
, OFPT_STATS_REPLY
, xid
, msg
);
3003 osr
->flags
= htons(0);
3007 static struct ofpbuf
*
3008 start_stats_reply(const struct ofp_stats_request
*request
, size_t body_len
)
3010 return make_stats_reply(request
->header
.xid
, request
->type
, body_len
);
3014 append_stats_reply(size_t nbytes
, struct ofconn
*ofconn
, struct ofpbuf
**msgp
)
3016 struct ofpbuf
*msg
= *msgp
;
3017 assert(nbytes
<= UINT16_MAX
- sizeof(struct ofp_stats_reply
));
3018 if (nbytes
+ msg
->size
> UINT16_MAX
) {
3019 struct ofp_stats_reply
*reply
= msg
->data
;
3020 reply
->flags
= htons(OFPSF_REPLY_MORE
);
3021 *msgp
= make_stats_reply(reply
->header
.xid
, reply
->type
, nbytes
);
3022 queue_tx(msg
, ofconn
, ofconn
->reply_counter
);
3024 return ofpbuf_put_uninit(*msgp
, nbytes
);
3028 handle_desc_stats_request(struct ofproto
*p
, struct ofconn
*ofconn
,
3029 struct ofp_stats_request
*request
)
3031 struct ofp_desc_stats
*ods
;
3034 msg
= start_stats_reply(request
, sizeof *ods
);
3035 ods
= append_stats_reply(sizeof *ods
, ofconn
, &msg
);
3036 memset(ods
, 0, sizeof *ods
);
3037 ovs_strlcpy(ods
->mfr_desc
, p
->mfr_desc
, sizeof ods
->mfr_desc
);
3038 ovs_strlcpy(ods
->hw_desc
, p
->hw_desc
, sizeof ods
->hw_desc
);
3039 ovs_strlcpy(ods
->sw_desc
, p
->sw_desc
, sizeof ods
->sw_desc
);
3040 ovs_strlcpy(ods
->serial_num
, p
->serial_desc
, sizeof ods
->serial_num
);
3041 ovs_strlcpy(ods
->dp_desc
, p
->dp_desc
, sizeof ods
->dp_desc
);
3042 queue_tx(msg
, ofconn
, ofconn
->reply_counter
);
3048 handle_table_stats_request(struct ofproto
*p
, struct ofconn
*ofconn
,
3049 struct ofp_stats_request
*request
)
3051 struct ofp_table_stats
*ots
;
3056 msg
= start_stats_reply(request
, sizeof *ots
* 2);
3058 /* Count rules other than subrules. */
3059 n_rules
= classifier_count(&p
->cls
);
3060 CLASSIFIER_FOR_EACH_EXACT_RULE (rule
, cr
, &p
->cls
) {
3066 /* Classifier table. */
3067 ots
= append_stats_reply(sizeof *ots
, ofconn
, &msg
);
3068 memset(ots
, 0, sizeof *ots
);
3069 strcpy(ots
->name
, "classifier");
3070 ots
->wildcards
= (ofconn
->flow_format
== NXFF_OPENFLOW10
3071 ? htonl(OFPFW_ALL
) : htonl(OVSFW_ALL
));
3072 ots
->max_entries
= htonl(1024 * 1024); /* An arbitrary big number. */
3073 ots
->active_count
= htonl(n_rules
);
3074 ots
->lookup_count
= htonll(0); /* XXX */
3075 ots
->matched_count
= htonll(0); /* XXX */
3077 queue_tx(msg
, ofconn
, ofconn
->reply_counter
);
3082 append_port_stat(struct ofport
*port
, struct ofconn
*ofconn
,
3083 struct ofpbuf
**msgp
)
3085 struct netdev_stats stats
;
3086 struct ofp_port_stats
*ops
;
3088 /* Intentionally ignore return value, since errors will set
3089 * 'stats' to all-1s, which is correct for OpenFlow, and
3090 * netdev_get_stats() will log errors. */
3091 netdev_get_stats(port
->netdev
, &stats
);
3093 ops
= append_stats_reply(sizeof *ops
, ofconn
, msgp
);
3094 ops
->port_no
= htons(port
->opp
.port_no
);
3095 memset(ops
->pad
, 0, sizeof ops
->pad
);
3096 ops
->rx_packets
= htonll(stats
.rx_packets
);
3097 ops
->tx_packets
= htonll(stats
.tx_packets
);
3098 ops
->rx_bytes
= htonll(stats
.rx_bytes
);
3099 ops
->tx_bytes
= htonll(stats
.tx_bytes
);
3100 ops
->rx_dropped
= htonll(stats
.rx_dropped
);
3101 ops
->tx_dropped
= htonll(stats
.tx_dropped
);
3102 ops
->rx_errors
= htonll(stats
.rx_errors
);
3103 ops
->tx_errors
= htonll(stats
.tx_errors
);
3104 ops
->rx_frame_err
= htonll(stats
.rx_frame_errors
);
3105 ops
->rx_over_err
= htonll(stats
.rx_over_errors
);
3106 ops
->rx_crc_err
= htonll(stats
.rx_crc_errors
);
3107 ops
->collisions
= htonll(stats
.collisions
);
3111 handle_port_stats_request(struct ofproto
*p
, struct ofconn
*ofconn
,
3112 struct ofp_stats_request
*osr
,
3115 struct ofp_port_stats_request
*psr
;
3116 struct ofp_port_stats
*ops
;
3118 struct ofport
*port
;
3120 if (arg_size
!= sizeof *psr
) {
3121 return ofp_mkerr(OFPET_BAD_REQUEST
, OFPBRC_BAD_LEN
);
3123 psr
= (struct ofp_port_stats_request
*) osr
->body
;
3125 msg
= start_stats_reply(osr
, sizeof *ops
* 16);
3126 if (psr
->port_no
!= htons(OFPP_NONE
)) {
3127 port
= get_port(p
, ofp_port_to_odp_port(ntohs(psr
->port_no
)));
3129 append_port_stat(port
, ofconn
, &msg
);
3132 HMAP_FOR_EACH (port
, hmap_node
, &p
->ports
) {
3133 append_port_stat(port
, ofconn
, &msg
);
3137 queue_tx(msg
, ofconn
, ofconn
->reply_counter
);
3141 struct flow_stats_cbdata
{
3142 struct ofproto
*ofproto
;
3143 struct ofconn
*ofconn
;
3148 /* Obtains statistic counters for 'rule' within 'p' and stores them into
3149 * '*packet_countp' and '*byte_countp'. If 'rule' is a wildcarded rule, the
3150 * returned statistic include statistics for all of 'rule''s subrules. */
3152 query_stats(struct ofproto
*p
, struct rule
*rule
,
3153 uint64_t *packet_countp
, uint64_t *byte_countp
)
3155 uint64_t packet_count
, byte_count
;
3156 struct rule
*subrule
;
3157 struct odp_flow
*odp_flows
;
3160 /* Start from historical data for 'rule' itself that are no longer tracked
3161 * by the datapath. This counts, for example, subrules that have
3163 packet_count
= rule
->packet_count
;
3164 byte_count
= rule
->byte_count
;
3166 /* Prepare to ask the datapath for statistics on 'rule', or if it is
3167 * wildcarded then on all of its subrules.
3169 * Also, add any statistics that are not tracked by the datapath for each
3170 * subrule. This includes, for example, statistics for packets that were
3171 * executed "by hand" by ofproto via dpif_execute() but must be accounted
3173 n_odp_flows
= rule
->cr
.wc
.wildcards
? list_size(&rule
->list
) : 1;
3174 odp_flows
= xzalloc(n_odp_flows
* sizeof *odp_flows
);
3175 if (rule
->cr
.wc
.wildcards
) {
3177 LIST_FOR_EACH (subrule
, list
, &rule
->list
) {
3178 odp_flow_key_from_flow(&odp_flows
[i
++].key
, &subrule
->cr
.flow
);
3179 packet_count
+= subrule
->packet_count
;
3180 byte_count
+= subrule
->byte_count
;
3183 odp_flow_key_from_flow(&odp_flows
[0].key
, &rule
->cr
.flow
);
3186 /* Fetch up-to-date statistics from the datapath and add them in. */
3187 if (!dpif_flow_get_multiple(p
->dpif
, odp_flows
, n_odp_flows
)) {
3189 for (i
= 0; i
< n_odp_flows
; i
++) {
3190 struct odp_flow
*odp_flow
= &odp_flows
[i
];
3191 packet_count
+= odp_flow
->stats
.n_packets
;
3192 byte_count
+= odp_flow
->stats
.n_bytes
;
3197 /* Return the stats to the caller. */
3198 *packet_countp
= packet_count
;
3199 *byte_countp
= byte_count
;
3203 flow_stats_cb(struct cls_rule
*rule_
, void *cbdata_
)
3205 struct rule
*rule
= rule_from_cls_rule(rule_
);
3206 struct flow_stats_cbdata
*cbdata
= cbdata_
;
3207 struct ofp_flow_stats
*ofs
;
3208 uint64_t packet_count
, byte_count
;
3209 size_t act_len
, len
;
3210 long long int tdiff
= time_msec() - rule
->created
;
3211 uint32_t sec
= tdiff
/ 1000;
3212 uint32_t msec
= tdiff
- (sec
* 1000);
3214 if (rule_is_hidden(rule
) || !rule_has_out_port(rule
, cbdata
->out_port
)) {
3218 act_len
= sizeof *rule
->actions
* rule
->n_actions
;
3219 len
= offsetof(struct ofp_flow_stats
, actions
) + act_len
;
3221 query_stats(cbdata
->ofproto
, rule
, &packet_count
, &byte_count
);
3223 ofs
= append_stats_reply(len
, cbdata
->ofconn
, &cbdata
->msg
);
3224 ofs
->length
= htons(len
);
3227 flow_to_match(&rule
->cr
.flow
, rule
->cr
.wc
.wildcards
,
3228 cbdata
->ofconn
->flow_format
, &ofs
->match
);
3229 ofs
->duration_sec
= htonl(sec
);
3230 ofs
->duration_nsec
= htonl(msec
* 1000000);
3231 ofs
->cookie
= rule
->flow_cookie
;
3232 ofs
->priority
= htons(rule
->cr
.priority
);
3233 ofs
->idle_timeout
= htons(rule
->idle_timeout
);
3234 ofs
->hard_timeout
= htons(rule
->hard_timeout
);
3235 memset(ofs
->pad2
, 0, sizeof ofs
->pad2
);
3236 ofs
->packet_count
= htonll(packet_count
);
3237 ofs
->byte_count
= htonll(byte_count
);
3238 if (rule
->n_actions
> 0) {
3239 memcpy(ofs
->actions
, rule
->actions
, act_len
);
3244 table_id_to_include(uint8_t table_id
)
3246 return table_id
== 0 || table_id
== 0xff ? CLS_INC_ALL
: 0;
3250 handle_flow_stats_request(struct ofproto
*p
, struct ofconn
*ofconn
,
3251 const struct ofp_stats_request
*osr
,
3254 struct ofp_flow_stats_request
*fsr
;
3255 struct flow_stats_cbdata cbdata
;
3256 struct cls_rule target
;
3258 if (arg_size
!= sizeof *fsr
) {
3259 return ofp_mkerr(OFPET_BAD_REQUEST
, OFPBRC_BAD_LEN
);
3261 fsr
= (struct ofp_flow_stats_request
*) osr
->body
;
3263 COVERAGE_INC(ofproto_flows_req
);
3265 cbdata
.ofconn
= ofconn
;
3266 cbdata
.out_port
= fsr
->out_port
;
3267 cbdata
.msg
= start_stats_reply(osr
, 1024);
3268 cls_rule_from_match(&fsr
->match
, 0, NXFF_OPENFLOW10
, 0, &target
);
3269 classifier_for_each_match(&p
->cls
, &target
,
3270 table_id_to_include(fsr
->table_id
),
3271 flow_stats_cb
, &cbdata
);
3272 queue_tx(cbdata
.msg
, ofconn
, ofconn
->reply_counter
);
3276 struct flow_stats_ds_cbdata
{
3277 struct ofproto
*ofproto
;
3282 flow_stats_ds_cb(struct cls_rule
*rule_
, void *cbdata_
)
3284 struct rule
*rule
= rule_from_cls_rule(rule_
);
3285 struct flow_stats_ds_cbdata
*cbdata
= cbdata_
;
3286 struct ds
*results
= cbdata
->results
;
3287 struct ofp_match match
;
3288 uint64_t packet_count
, byte_count
;
3289 size_t act_len
= sizeof *rule
->actions
* rule
->n_actions
;
3291 /* Don't report on subrules. */
3292 if (rule
->super
!= NULL
) {
3296 query_stats(cbdata
->ofproto
, rule
, &packet_count
, &byte_count
);
3297 flow_to_match(&rule
->cr
.flow
, rule
->cr
.wc
.wildcards
,
3298 NXFF_OPENFLOW10
, &match
);
3300 ds_put_format(results
, "duration=%llds, ",
3301 (time_msec() - rule
->created
) / 1000);
3302 ds_put_format(results
, "priority=%u, ", rule
->cr
.priority
);
3303 ds_put_format(results
, "n_packets=%"PRIu64
", ", packet_count
);
3304 ds_put_format(results
, "n_bytes=%"PRIu64
", ", byte_count
);
3305 ofp_print_match(results
, &match
, true);
3307 ofp_print_actions(results
, &rule
->actions
->header
, act_len
);
3309 ds_put_cstr(results
, "drop");
3311 ds_put_cstr(results
, "\n");
3314 /* Adds a pretty-printed description of all flows to 'results', including
3315 * those marked hidden by secchan (e.g., by in-band control). */
3317 ofproto_get_all_flows(struct ofproto
*p
, struct ds
*results
)
3319 struct ofp_match match
;
3320 struct cls_rule target
;
3321 struct flow_stats_ds_cbdata cbdata
;
3323 memset(&match
, 0, sizeof match
);
3324 match
.wildcards
= htonl(OVSFW_ALL
);
3327 cbdata
.results
= results
;
3329 cls_rule_from_match(&match
, 0, NXFF_OPENFLOW10
, 0, &target
);
3330 classifier_for_each_match(&p
->cls
, &target
, CLS_INC_ALL
,
3331 flow_stats_ds_cb
, &cbdata
);
3334 struct aggregate_stats_cbdata
{
3335 struct ofproto
*ofproto
;
3337 uint64_t packet_count
;
3338 uint64_t byte_count
;
3343 aggregate_stats_cb(struct cls_rule
*rule_
, void *cbdata_
)
3345 struct rule
*rule
= rule_from_cls_rule(rule_
);
3346 struct aggregate_stats_cbdata
*cbdata
= cbdata_
;
3347 uint64_t packet_count
, byte_count
;
3349 if (rule_is_hidden(rule
) || !rule_has_out_port(rule
, cbdata
->out_port
)) {
3353 query_stats(cbdata
->ofproto
, rule
, &packet_count
, &byte_count
);
3355 cbdata
->packet_count
+= packet_count
;
3356 cbdata
->byte_count
+= byte_count
;
3361 handle_aggregate_stats_request(struct ofproto
*p
, struct ofconn
*ofconn
,
3362 const struct ofp_stats_request
*osr
,
3365 struct ofp_aggregate_stats_request
*asr
;
3366 struct ofp_aggregate_stats_reply
*reply
;
3367 struct aggregate_stats_cbdata cbdata
;
3368 struct cls_rule target
;
3371 if (arg_size
!= sizeof *asr
) {
3372 return ofp_mkerr(OFPET_BAD_REQUEST
, OFPBRC_BAD_LEN
);
3374 asr
= (struct ofp_aggregate_stats_request
*) osr
->body
;
3376 COVERAGE_INC(ofproto_agg_request
);
3378 cbdata
.out_port
= asr
->out_port
;
3379 cbdata
.packet_count
= 0;
3380 cbdata
.byte_count
= 0;
3382 cls_rule_from_match(&asr
->match
, 0, NXFF_OPENFLOW10
, 0, &target
);
3383 classifier_for_each_match(&p
->cls
, &target
,
3384 table_id_to_include(asr
->table_id
),
3385 aggregate_stats_cb
, &cbdata
);
3387 msg
= start_stats_reply(osr
, sizeof *reply
);
3388 reply
= append_stats_reply(sizeof *reply
, ofconn
, &msg
);
3389 reply
->flow_count
= htonl(cbdata
.n_flows
);
3390 reply
->packet_count
= htonll(cbdata
.packet_count
);
3391 reply
->byte_count
= htonll(cbdata
.byte_count
);
3392 queue_tx(msg
, ofconn
, ofconn
->reply_counter
);
3396 struct queue_stats_cbdata
{
3397 struct ofconn
*ofconn
;
3398 struct ofport
*ofport
;
3403 put_queue_stats(struct queue_stats_cbdata
*cbdata
, uint32_t queue_id
,
3404 const struct netdev_queue_stats
*stats
)
3406 struct ofp_queue_stats
*reply
;
3408 reply
= append_stats_reply(sizeof *reply
, cbdata
->ofconn
, &cbdata
->msg
);
3409 reply
->port_no
= htons(cbdata
->ofport
->opp
.port_no
);
3410 memset(reply
->pad
, 0, sizeof reply
->pad
);
3411 reply
->queue_id
= htonl(queue_id
);
3412 reply
->tx_bytes
= htonll(stats
->tx_bytes
);
3413 reply
->tx_packets
= htonll(stats
->tx_packets
);
3414 reply
->tx_errors
= htonll(stats
->tx_errors
);
3418 handle_queue_stats_dump_cb(uint32_t queue_id
,
3419 struct netdev_queue_stats
*stats
,
3422 struct queue_stats_cbdata
*cbdata
= cbdata_
;
3424 put_queue_stats(cbdata
, queue_id
, stats
);
3428 handle_queue_stats_for_port(struct ofport
*port
, uint32_t queue_id
,
3429 struct queue_stats_cbdata
*cbdata
)
3431 cbdata
->ofport
= port
;
3432 if (queue_id
== OFPQ_ALL
) {
3433 netdev_dump_queue_stats(port
->netdev
,
3434 handle_queue_stats_dump_cb
, cbdata
);
3436 struct netdev_queue_stats stats
;
3438 if (!netdev_get_queue_stats(port
->netdev
, queue_id
, &stats
)) {
3439 put_queue_stats(cbdata
, queue_id
, &stats
);
3445 handle_queue_stats_request(struct ofproto
*ofproto
, struct ofconn
*ofconn
,
3446 const struct ofp_stats_request
*osr
,
3449 struct ofp_queue_stats_request
*qsr
;
3450 struct queue_stats_cbdata cbdata
;
3451 struct ofport
*port
;
3452 unsigned int port_no
;
3455 if (arg_size
!= sizeof *qsr
) {
3456 return ofp_mkerr(OFPET_BAD_REQUEST
, OFPBRC_BAD_LEN
);
3458 qsr
= (struct ofp_queue_stats_request
*) osr
->body
;
3460 COVERAGE_INC(ofproto_queue_req
);
3462 cbdata
.ofconn
= ofconn
;
3463 cbdata
.msg
= start_stats_reply(osr
, 128);
3465 port_no
= ntohs(qsr
->port_no
);
3466 queue_id
= ntohl(qsr
->queue_id
);
3467 if (port_no
== OFPP_ALL
) {
3468 HMAP_FOR_EACH (port
, hmap_node
, &ofproto
->ports
) {
3469 handle_queue_stats_for_port(port
, queue_id
, &cbdata
);
3471 } else if (port_no
< ofproto
->max_ports
) {
3472 port
= get_port(ofproto
, ofp_port_to_odp_port(port_no
));
3474 handle_queue_stats_for_port(port
, queue_id
, &cbdata
);
3477 ofpbuf_delete(cbdata
.msg
);
3478 return ofp_mkerr(OFPET_QUEUE_OP_FAILED
, OFPQOFC_BAD_PORT
);
3480 queue_tx(cbdata
.msg
, ofconn
, ofconn
->reply_counter
);
3486 handle_stats_request(struct ofproto
*p
, struct ofconn
*ofconn
,
3487 struct ofp_header
*oh
)
3489 struct ofp_stats_request
*osr
;
3493 error
= check_ofp_message_array(oh
, OFPT_STATS_REQUEST
, sizeof *osr
,
3498 osr
= (struct ofp_stats_request
*) oh
;
3500 switch (ntohs(osr
->type
)) {
3502 return handle_desc_stats_request(p
, ofconn
, osr
);
3505 return handle_flow_stats_request(p
, ofconn
, osr
, arg_size
);
3507 case OFPST_AGGREGATE
:
3508 return handle_aggregate_stats_request(p
, ofconn
, osr
, arg_size
);
3511 return handle_table_stats_request(p
, ofconn
, osr
);
3514 return handle_port_stats_request(p
, ofconn
, osr
, arg_size
);
3517 return handle_queue_stats_request(p
, ofconn
, osr
, arg_size
);
3520 return ofp_mkerr(OFPET_BAD_REQUEST
, OFPBRC_BAD_VENDOR
);
3523 return ofp_mkerr(OFPET_BAD_REQUEST
, OFPBRC_BAD_STAT
);
3527 static long long int
3528 msec_from_nsec(uint64_t sec
, uint32_t nsec
)
3530 return !sec
? 0 : sec
* 1000 + nsec
/ 1000000;
3534 update_time(struct ofproto
*ofproto
, struct rule
*rule
,
3535 const struct odp_flow_stats
*stats
)
3537 long long int used
= msec_from_nsec(stats
->used_sec
, stats
->used_nsec
);
3538 if (used
> rule
->used
) {
3540 if (rule
->super
&& used
> rule
->super
->used
) {
3541 rule
->super
->used
= used
;
3543 netflow_flow_update_time(ofproto
->netflow
, &rule
->nf_flow
, used
);
3548 update_stats(struct ofproto
*ofproto
, struct rule
*rule
,
3549 const struct odp_flow_stats
*stats
)
3551 if (stats
->n_packets
) {
3552 update_time(ofproto
, rule
, stats
);
3553 rule
->packet_count
+= stats
->n_packets
;
3554 rule
->byte_count
+= stats
->n_bytes
;
3555 netflow_flow_update_flags(&rule
->nf_flow
, stats
->tcp_flags
);
3559 /* Implements OFPFC_ADD and the cases for OFPFC_MODIFY and OFPFC_MODIFY_STRICT
3560 * in which no matching flow already exists in the flow table.
3562 * Adds the flow specified by 'ofm', which is followed by 'n_actions'
3563 * ofp_actions, to 'p''s flow table. Returns 0 on success or an OpenFlow error
3564 * code as encoded by ofp_mkerr() on failure.
3566 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3569 add_flow(struct ofproto
*p
, struct ofconn
*ofconn
,
3570 const struct ofp_flow_mod
*ofm
, size_t n_actions
)
3572 struct ofpbuf
*packet
;
3577 if (ofm
->flags
& htons(OFPFF_CHECK_OVERLAP
)) {
3580 cls_rule_from_match(&ofm
->match
, ntohs(ofm
->priority
),
3581 ofconn
->flow_format
, ofm
->cookie
, &cr
);
3582 if (classifier_rule_overlaps(&p
->cls
, &cr
)) {
3583 return ofp_mkerr(OFPET_FLOW_MOD_FAILED
, OFPFMFC_OVERLAP
);
3587 rule
= rule_create(p
, NULL
, (const union ofp_action
*) ofm
->actions
,
3588 n_actions
, ntohs(ofm
->idle_timeout
),
3589 ntohs(ofm
->hard_timeout
), ofm
->cookie
,
3590 ofm
->flags
& htons(OFPFF_SEND_FLOW_REM
));
3591 cls_rule_from_match(&ofm
->match
, ntohs(ofm
->priority
),
3592 ofconn
->flow_format
, ofm
->cookie
, &rule
->cr
);
3595 if (ofm
->buffer_id
!= htonl(UINT32_MAX
)) {
3596 error
= pktbuf_retrieve(ofconn
->pktbuf
, ntohl(ofm
->buffer_id
),
3600 in_port
= UINT16_MAX
;
3603 rule_insert(p
, rule
, packet
, in_port
);
3607 static struct rule
*
3608 find_flow_strict(struct ofproto
*p
, struct ofconn
*ofconn
,
3609 const struct ofp_flow_mod
*ofm
)
3611 struct cls_rule target
;
3613 cls_rule_from_match(&ofm
->match
, ntohs(ofm
->priority
),
3614 ofconn
->flow_format
, ofm
->cookie
, &target
);
3615 return rule_from_cls_rule(classifier_find_rule_exactly(&p
->cls
, &target
));
3619 send_buffered_packet(struct ofproto
*ofproto
, struct ofconn
*ofconn
,
3620 struct rule
*rule
, const struct ofp_flow_mod
*ofm
)
3622 struct ofpbuf
*packet
;
3627 if (ofm
->buffer_id
== htonl(UINT32_MAX
)) {
3631 error
= pktbuf_retrieve(ofconn
->pktbuf
, ntohl(ofm
->buffer_id
),
3637 flow_extract(packet
, 0, in_port
, &flow
);
3638 rule_execute(ofproto
, rule
, packet
, &flow
);
3643 /* OFPFC_MODIFY and OFPFC_MODIFY_STRICT. */
3645 struct modify_flows_cbdata
{
3646 struct ofproto
*ofproto
;
3647 const struct ofp_flow_mod
*ofm
;
3652 static int modify_flow(struct ofproto
*, const struct ofp_flow_mod
*,
3653 size_t n_actions
, struct rule
*);
3654 static void modify_flows_cb(struct cls_rule
*, void *cbdata_
);
3656 /* Implements OFPFC_MODIFY. Returns 0 on success or an OpenFlow error code as
3657 * encoded by ofp_mkerr() on failure.
3659 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3662 modify_flows_loose(struct ofproto
*p
, struct ofconn
*ofconn
,
3663 const struct ofp_flow_mod
*ofm
, size_t n_actions
)
3665 struct modify_flows_cbdata cbdata
;
3666 struct cls_rule target
;
3670 cbdata
.n_actions
= n_actions
;
3671 cbdata
.match
= NULL
;
3673 cls_rule_from_match(&ofm
->match
, 0, ofconn
->flow_format
,
3674 ofm
->cookie
, &target
);
3676 classifier_for_each_match(&p
->cls
, &target
, CLS_INC_ALL
,
3677 modify_flows_cb
, &cbdata
);
3679 /* This credits the packet to whichever flow happened to happened to
3680 * match last. That's weird. Maybe we should do a lookup for the
3681 * flow that actually matches the packet? Who knows. */
3682 send_buffered_packet(p
, ofconn
, cbdata
.match
, ofm
);
3685 return add_flow(p
, ofconn
, ofm
, n_actions
);
3689 /* Implements OFPFC_MODIFY_STRICT. Returns 0 on success or an OpenFlow error
3690 * code as encoded by ofp_mkerr() on failure.
3692 * 'ofconn' is used to retrieve the packet buffer specified in ofm->buffer_id,
3695 modify_flow_strict(struct ofproto
*p
, struct ofconn
*ofconn
,
3696 struct ofp_flow_mod
*ofm
, size_t n_actions
)
3698 struct rule
*rule
= find_flow_strict(p
, ofconn
, ofm
);
3699 if (rule
&& !rule_is_hidden(rule
)) {
3700 modify_flow(p
, ofm
, n_actions
, rule
);
3701 return send_buffered_packet(p
, ofconn
, rule
, ofm
);
3703 return add_flow(p
, ofconn
, ofm
, n_actions
);
3707 /* Callback for modify_flows_loose(). */
3709 modify_flows_cb(struct cls_rule
*rule_
, void *cbdata_
)
3711 struct rule
*rule
= rule_from_cls_rule(rule_
);
3712 struct modify_flows_cbdata
*cbdata
= cbdata_
;
3714 if (!rule_is_hidden(rule
)) {
3715 cbdata
->match
= rule
;
3716 modify_flow(cbdata
->ofproto
, cbdata
->ofm
, cbdata
->n_actions
, rule
);
3720 /* Implements core of OFPFC_MODIFY and OFPFC_MODIFY_STRICT where 'rule' has
3721 * been identified as a flow in 'p''s flow table to be modified, by changing
3722 * the rule's actions to match those in 'ofm' (which is followed by 'n_actions'
3723 * ofp_action[] structures). */
3725 modify_flow(struct ofproto
*p
, const struct ofp_flow_mod
*ofm
,
3726 size_t n_actions
, struct rule
*rule
)
3728 size_t actions_len
= n_actions
* sizeof *rule
->actions
;
3730 rule
->flow_cookie
= ofm
->cookie
;
3732 /* If the actions are the same, do nothing. */
3733 if (n_actions
== rule
->n_actions
3734 && (!n_actions
|| !memcmp(ofm
->actions
, rule
->actions
, actions_len
)))
3739 /* Replace actions. */
3740 free(rule
->actions
);
3741 rule
->actions
= n_actions
? xmemdup(ofm
->actions
, actions_len
) : NULL
;
3742 rule
->n_actions
= n_actions
;
3744 /* Make sure that the datapath gets updated properly. */
3745 if (rule
->cr
.wc
.wildcards
) {
3746 COVERAGE_INC(ofproto_mod_wc_flow
);
3747 p
->need_revalidate
= true;
3749 rule_update_actions(p
, rule
);
3755 /* OFPFC_DELETE implementation. */
3757 struct delete_flows_cbdata
{
3758 struct ofproto
*ofproto
;
3762 static void delete_flows_cb(struct cls_rule
*, void *cbdata_
);
3763 static void delete_flow(struct ofproto
*, struct rule
*, ovs_be16 out_port
);
3765 /* Implements OFPFC_DELETE. */
3767 delete_flows_loose(struct ofproto
*p
, struct ofconn
*ofconn
,
3768 const struct ofp_flow_mod
*ofm
)
3770 struct delete_flows_cbdata cbdata
;
3771 struct cls_rule target
;
3774 cbdata
.out_port
= ofm
->out_port
;
3776 cls_rule_from_match(&ofm
->match
, 0, ofconn
->flow_format
,
3777 ofm
->cookie
, &target
);
3779 classifier_for_each_match(&p
->cls
, &target
, CLS_INC_ALL
,
3780 delete_flows_cb
, &cbdata
);
3783 /* Implements OFPFC_DELETE_STRICT. */
3785 delete_flow_strict(struct ofproto
*p
, struct ofconn
*ofconn
,
3786 struct ofp_flow_mod
*ofm
)
3788 struct rule
*rule
= find_flow_strict(p
, ofconn
, ofm
);
3790 delete_flow(p
, rule
, ofm
->out_port
);
3794 /* Callback for delete_flows_loose(). */
3796 delete_flows_cb(struct cls_rule
*rule_
, void *cbdata_
)
3798 struct rule
*rule
= rule_from_cls_rule(rule_
);
3799 struct delete_flows_cbdata
*cbdata
= cbdata_
;
3801 delete_flow(cbdata
->ofproto
, rule
, cbdata
->out_port
);
3804 /* Implements core of OFPFC_DELETE and OFPFC_DELETE_STRICT where 'rule' has
3805 * been identified as a flow to delete from 'p''s flow table, by deleting the
3806 * flow and sending out a OFPT_FLOW_REMOVED message to any interested
3809 * Will not delete 'rule' if it is hidden. Will delete 'rule' only if
3810 * 'out_port' is htons(OFPP_NONE) or if 'rule' actually outputs to the
3811 * specified 'out_port'. */
3813 delete_flow(struct ofproto
*p
, struct rule
*rule
, ovs_be16 out_port
)
3815 if (rule_is_hidden(rule
)) {
3819 if (out_port
!= htons(OFPP_NONE
) && !rule_has_out_port(rule
, out_port
)) {
3823 send_flow_removed(p
, rule
, time_msec(), OFPRR_DELETE
);
3824 rule_remove(p
, rule
);
3828 handle_flow_mod(struct ofproto
*p
, struct ofconn
*ofconn
,
3829 struct ofp_flow_mod
*ofm
)
3831 struct ofp_match orig_match
;
3835 error
= reject_slave_controller(ofconn
, &ofm
->header
);
3839 error
= check_ofp_message_array(&ofm
->header
, OFPT_FLOW_MOD
, sizeof *ofm
,
3840 sizeof *ofm
->actions
, &n_actions
);
3845 /* We do not support the emergency flow cache. It will hopefully
3846 * get dropped from OpenFlow in the near future. */
3847 if (ofm
->flags
& htons(OFPFF_EMERG
)) {
3848 /* There isn't a good fit for an error code, so just state that the
3849 * flow table is full. */
3850 return ofp_mkerr(OFPET_FLOW_MOD_FAILED
, OFPFMFC_ALL_TABLES_FULL
);
3853 /* Normalize ofp->match. If normalization actually changes anything, then
3854 * log the differences. */
3855 ofm
->match
.pad1
[0] = ofm
->match
.pad2
[0] = 0;
3856 orig_match
= ofm
->match
;
3857 normalize_match(&ofm
->match
);
3858 if (memcmp(&ofm
->match
, &orig_match
, sizeof orig_match
)) {
3859 static struct vlog_rate_limit normal_rl
= VLOG_RATE_LIMIT_INIT(1, 1);
3860 if (!VLOG_DROP_INFO(&normal_rl
)) {
3861 char *old
= ofp_match_to_literal_string(&orig_match
);
3862 char *new = ofp_match_to_literal_string(&ofm
->match
);
3863 VLOG_INFO("%s: normalization changed ofp_match, details:",
3864 rconn_get_name(ofconn
->rconn
));
3865 VLOG_INFO(" pre: %s", old
);
3866 VLOG_INFO("post: %s", new);
3872 if (!ofm
->match
.wildcards
) {
3873 ofm
->priority
= htons(UINT16_MAX
);
3876 error
= validate_actions((const union ofp_action
*) ofm
->actions
,
3877 n_actions
, p
->max_ports
);
3882 switch (ntohs(ofm
->command
)) {
3884 return add_flow(p
, ofconn
, ofm
, n_actions
);
3887 return modify_flows_loose(p
, ofconn
, ofm
, n_actions
);
3889 case OFPFC_MODIFY_STRICT
:
3890 return modify_flow_strict(p
, ofconn
, ofm
, n_actions
);
3893 delete_flows_loose(p
, ofconn
, ofm
);
3896 case OFPFC_DELETE_STRICT
:
3897 delete_flow_strict(p
, ofconn
, ofm
);
3901 return ofp_mkerr(OFPET_FLOW_MOD_FAILED
, OFPFMFC_BAD_COMMAND
);
3906 handle_tun_id_from_cookie(struct ofconn
*ofconn
, struct nxt_tun_id_cookie
*msg
)
3910 error
= check_ofp_message(&msg
->header
, OFPT_VENDOR
, sizeof *msg
);
3915 ofconn
->flow_format
= msg
->set
? NXFF_TUN_ID_FROM_COOKIE
: NXFF_OPENFLOW10
;
3920 handle_role_request(struct ofproto
*ofproto
,
3921 struct ofconn
*ofconn
, struct nicira_header
*msg
)
3923 struct nx_role_request
*nrr
;
3924 struct nx_role_request
*reply
;
3928 if (ntohs(msg
->header
.length
) != sizeof *nrr
) {
3929 VLOG_WARN_RL(&rl
, "received role request of length %u (expected %zu)",
3930 ntohs(msg
->header
.length
), sizeof *nrr
);
3931 return ofp_mkerr(OFPET_BAD_REQUEST
, OFPBRC_BAD_LEN
);
3933 nrr
= (struct nx_role_request
*) msg
;
3935 if (ofconn
->type
!= OFCONN_PRIMARY
) {
3936 VLOG_WARN_RL(&rl
, "ignoring role request on non-controller "
3938 return ofp_mkerr(OFPET_BAD_REQUEST
, OFPBRC_EPERM
);
3941 role
= ntohl(nrr
->role
);
3942 if (role
!= NX_ROLE_OTHER
&& role
!= NX_ROLE_MASTER
3943 && role
!= NX_ROLE_SLAVE
) {
3944 VLOG_WARN_RL(&rl
, "received request for unknown role %"PRIu32
, role
);
3946 /* There's no good error code for this. */
3947 return ofp_mkerr(OFPET_BAD_REQUEST
, -1);
3950 if (role
== NX_ROLE_MASTER
) {
3951 struct ofconn
*other
;
3953 HMAP_FOR_EACH (other
, hmap_node
, &ofproto
->controllers
) {
3954 if (other
->role
== NX_ROLE_MASTER
) {
3955 other
->role
= NX_ROLE_SLAVE
;
3959 ofconn
->role
= role
;
3961 reply
= make_nxmsg_xid(sizeof *reply
, NXT_ROLE_REPLY
, msg
->header
.xid
,
3963 reply
->role
= htonl(role
);
3964 queue_tx(buf
, ofconn
, ofconn
->reply_counter
);
3970 handle_vendor(struct ofproto
*p
, struct ofconn
*ofconn
, void *msg
)
3972 struct ofp_vendor_header
*ovh
= msg
;
3973 struct nicira_header
*nh
;
3975 if (ntohs(ovh
->header
.length
) < sizeof(struct ofp_vendor_header
)) {
3976 VLOG_WARN_RL(&rl
, "received vendor message of length %u "
3977 "(expected at least %zu)",
3978 ntohs(ovh
->header
.length
), sizeof(struct ofp_vendor_header
));
3979 return ofp_mkerr(OFPET_BAD_REQUEST
, OFPBRC_BAD_LEN
);
3981 if (ovh
->vendor
!= htonl(NX_VENDOR_ID
)) {
3982 return ofp_mkerr(OFPET_BAD_REQUEST
, OFPBRC_BAD_VENDOR
);
3984 if (ntohs(ovh
->header
.length
) < sizeof(struct nicira_header
)) {
3985 VLOG_WARN_RL(&rl
, "received Nicira vendor message of length %u "
3986 "(expected at least %zu)",
3987 ntohs(ovh
->header
.length
), sizeof(struct nicira_header
));
3988 return ofp_mkerr(OFPET_BAD_REQUEST
, OFPBRC_BAD_LEN
);
3992 switch (ntohl(nh
->subtype
)) {
3993 case NXT_STATUS_REQUEST
:
3994 return switch_status_handle_request(p
->switch_status
, ofconn
->rconn
,
3997 case NXT_TUN_ID_FROM_COOKIE
:
3998 return handle_tun_id_from_cookie(ofconn
, msg
);
4000 case NXT_ROLE_REQUEST
:
4001 return handle_role_request(p
, ofconn
, msg
);
4004 return ofp_mkerr(OFPET_BAD_REQUEST
, OFPBRC_BAD_SUBTYPE
);
4008 handle_barrier_request(struct ofconn
*ofconn
, struct ofp_header
*oh
)
4010 struct ofp_header
*ob
;
4013 /* Currently, everything executes synchronously, so we can just
4014 * immediately send the barrier reply. */
4015 ob
= make_openflow_xid(sizeof *ob
, OFPT_BARRIER_REPLY
, oh
->xid
, &buf
);
4016 queue_tx(buf
, ofconn
, ofconn
->reply_counter
);
4021 handle_openflow(struct ofconn
*ofconn
, struct ofproto
*p
,
4022 struct ofpbuf
*ofp_msg
)
4024 struct ofp_header
*oh
= ofp_msg
->data
;
4027 COVERAGE_INC(ofproto_recv_openflow
);
4029 case OFPT_ECHO_REQUEST
:
4030 error
= handle_echo_request(ofconn
, oh
);
4033 case OFPT_ECHO_REPLY
:
4037 case OFPT_FEATURES_REQUEST
:
4038 error
= handle_features_request(p
, ofconn
, oh
);
4041 case OFPT_GET_CONFIG_REQUEST
:
4042 error
= handle_get_config_request(p
, ofconn
, oh
);
4045 case OFPT_SET_CONFIG
:
4046 error
= handle_set_config(p
, ofconn
, ofp_msg
->data
);
4049 case OFPT_PACKET_OUT
:
4050 error
= handle_packet_out(p
, ofconn
, ofp_msg
->data
);
4054 error
= handle_port_mod(p
, ofconn
, oh
);
4058 error
= handle_flow_mod(p
, ofconn
, ofp_msg
->data
);
4061 case OFPT_STATS_REQUEST
:
4062 error
= handle_stats_request(p
, ofconn
, oh
);
4066 error
= handle_vendor(p
, ofconn
, ofp_msg
->data
);
4069 case OFPT_BARRIER_REQUEST
:
4070 error
= handle_barrier_request(ofconn
, oh
);
4074 if (VLOG_IS_WARN_ENABLED()) {
4075 char *s
= ofp_to_string(oh
, ntohs(oh
->length
), 2);
4076 VLOG_DBG_RL(&rl
, "OpenFlow message ignored: %s", s
);
4079 error
= ofp_mkerr(OFPET_BAD_REQUEST
, OFPBRC_BAD_TYPE
);
4084 send_error_oh(ofconn
, ofp_msg
->data
, error
);
4089 handle_odp_miss_msg(struct ofproto
*p
, struct ofpbuf
*packet
)
4091 struct odp_msg
*msg
= packet
->data
;
4093 struct ofpbuf payload
;
4096 payload
.data
= msg
+ 1;
4097 payload
.size
= msg
->length
- sizeof *msg
;
4098 flow_extract(&payload
, msg
->arg
, msg
->port
, &flow
);
4100 /* Check with in-band control to see if this packet should be sent
4101 * to the local port regardless of the flow table. */
4102 if (in_band_msg_in_hook(p
->in_band
, &flow
, &payload
)) {
4103 union odp_action action
;
4105 memset(&action
, 0, sizeof(action
));
4106 action
.output
.type
= ODPAT_OUTPUT
;
4107 action
.output
.port
= ODPP_LOCAL
;
4108 dpif_execute(p
->dpif
, &action
, 1, &payload
);
4111 rule
= lookup_valid_rule(p
, &flow
);
4113 /* Don't send a packet-in if OFPPC_NO_PACKET_IN asserted. */
4114 struct ofport
*port
= get_port(p
, msg
->port
);
4116 if (port
->opp
.config
& OFPPC_NO_PACKET_IN
) {
4117 COVERAGE_INC(ofproto_no_packet_in
);
4118 /* XXX install 'drop' flow entry */
4119 ofpbuf_delete(packet
);
4123 VLOG_WARN_RL(&rl
, "packet-in on unknown port %"PRIu16
, msg
->port
);
4126 COVERAGE_INC(ofproto_packet_in
);
4127 send_packet_in(p
, packet
);
4131 if (rule
->cr
.wc
.wildcards
) {
4132 rule
= rule_create_subrule(p
, rule
, &flow
);
4133 rule_make_actions(p
, rule
, packet
);
4135 if (!rule
->may_install
) {
4136 /* The rule is not installable, that is, we need to process every
4137 * packet, so process the current packet and set its actions into
4139 rule_make_actions(p
, rule
, packet
);
4141 /* XXX revalidate rule if it needs it */
4145 if (rule
->super
&& rule
->super
->cr
.priority
== FAIL_OPEN_PRIORITY
) {
4147 * Extra-special case for fail-open mode.
4149 * We are in fail-open mode and the packet matched the fail-open rule,
4150 * but we are connected to a controller too. We should send the packet
4151 * up to the controller in the hope that it will try to set up a flow
4152 * and thereby allow us to exit fail-open.
4154 * See the top-level comment in fail-open.c for more information.
4156 send_packet_in(p
, ofpbuf_clone_with_headroom(packet
,
4157 DPIF_RECV_MSG_PADDING
));
4160 ofpbuf_pull(packet
, sizeof *msg
);
4161 rule_execute(p
, rule
, packet
, &flow
);
4162 rule_reinstall(p
, rule
);
4166 handle_odp_msg(struct ofproto
*p
, struct ofpbuf
*packet
)
4168 struct odp_msg
*msg
= packet
->data
;
4170 switch (msg
->type
) {
4171 case _ODPL_ACTION_NR
:
4172 COVERAGE_INC(ofproto_ctlr_action
);
4173 send_packet_in(p
, packet
);
4176 case _ODPL_SFLOW_NR
:
4178 ofproto_sflow_received(p
->sflow
, msg
);
4180 ofpbuf_delete(packet
);
4184 handle_odp_miss_msg(p
, packet
);
4188 VLOG_WARN_RL(&rl
, "received ODP message of unexpected type %"PRIu32
,
4194 /* Flow expiration. */
4196 struct expire_cbdata
{
4197 struct ofproto
*ofproto
;
4201 static int ofproto_dp_max_idle(const struct ofproto
*);
4202 static void ofproto_update_used(struct ofproto
*);
4203 static void rule_expire(struct cls_rule
*, void *cbdata
);
4205 /* This function is called periodically by ofproto_run(). Its job is to
4206 * collect updates for the flows that have been installed into the datapath,
4207 * most importantly when they last were used, and then use that information to
4208 * expire flows that have not been used recently.
4210 * Returns the number of milliseconds after which it should be called again. */
4212 ofproto_expire(struct ofproto
*ofproto
)
4214 struct expire_cbdata cbdata
;
4216 /* Update 'used' for each flow in the datapath. */
4217 ofproto_update_used(ofproto
);
4219 /* Expire idle flows.
4221 * A wildcarded flow is idle only when all of its subrules have expired due
4222 * to becoming idle, so iterate through the exact-match flows first. */
4223 cbdata
.ofproto
= ofproto
;
4224 cbdata
.dp_max_idle
= ofproto_dp_max_idle(ofproto
);
4225 classifier_for_each(&ofproto
->cls
, CLS_INC_EXACT
, rule_expire
, &cbdata
);
4226 classifier_for_each(&ofproto
->cls
, CLS_INC_WILD
, rule_expire
, &cbdata
);
4228 /* Let the hook know that we're at a stable point: all outstanding data
4229 * in existing flows has been accounted to the account_cb. Thus, the
4230 * hook can now reasonably do operations that depend on having accurate
4231 * flow volume accounting (currently, that's just bond rebalancing). */
4232 if (ofproto
->ofhooks
->account_checkpoint_cb
) {
4233 ofproto
->ofhooks
->account_checkpoint_cb(ofproto
->aux
);
4236 return MIN(cbdata
.dp_max_idle
, 1000);
4239 /* Update 'used' member of each flow currently installed into the datapath. */
4241 ofproto_update_used(struct ofproto
*p
)
4243 struct odp_flow
*flows
;
4248 error
= dpif_flow_list_all(p
->dpif
, &flows
, &n_flows
);
4253 for (i
= 0; i
< n_flows
; i
++) {
4254 struct odp_flow
*f
= &flows
[i
];
4255 struct cls_rule target
;
4259 odp_flow_key_to_flow(&f
->key
, &flow
);
4260 cls_rule_from_flow(&flow
, 0, UINT16_MAX
, &target
);
4262 rule
= rule_from_cls_rule(classifier_find_rule_exactly(&p
->cls
,
4265 if (rule
&& rule
->installed
) {
4266 update_time(p
, rule
, &f
->stats
);
4267 rule_account(p
, rule
, f
->stats
.n_bytes
);
4269 /* There's a flow in the datapath that we know nothing about.
4271 COVERAGE_INC(ofproto_unexpected_rule
);
4272 dpif_flow_del(p
->dpif
, f
);
4279 /* Calculates and returns the number of milliseconds of idle time after which
4280 * flows should expire from the datapath and we should fold their statistics
4281 * into their parent rules in userspace. */
4283 ofproto_dp_max_idle(const struct ofproto
*ofproto
)
4286 * Idle time histogram.
4288 * Most of the time a switch has a relatively small number of flows. When
4289 * this is the case we might as well keep statistics for all of them in
4290 * userspace and to cache them in the kernel datapath for performance as
4293 * As the number of flows increases, the memory required to maintain
4294 * statistics about them in userspace and in the kernel becomes
4295 * significant. However, with a large number of flows it is likely that
4296 * only a few of them are "heavy hitters" that consume a large amount of
4297 * bandwidth. At this point, only heavy hitters are worth caching in the
4298 * kernel and maintaining in userspaces; other flows we can discard.
4300 * The technique used to compute the idle time is to build a histogram with
4301 * N_BUCKETS bucket whose width is BUCKET_WIDTH msecs each. Each flow that
4302 * is installed in the kernel gets dropped in the appropriate bucket.
4303 * After the histogram has been built, we compute the cutoff so that only
4304 * the most-recently-used 1% of flows (but at least 1000 flows) are kept
4305 * cached. At least the most-recently-used bucket of flows is kept, so
4306 * actually an arbitrary number of flows can be kept in any given
4307 * expiration run (though the next run will delete most of those unless
4308 * they receive additional data).
4310 * This requires a second pass through the exact-match flows, in addition
4311 * to the pass made by ofproto_update_used(), because the former function
4312 * never looks at uninstallable flows.
4314 enum { BUCKET_WIDTH
= ROUND_UP(100, TIME_UPDATE_INTERVAL
) };
4315 enum { N_BUCKETS
= 5000 / BUCKET_WIDTH
};
4316 int buckets
[N_BUCKETS
] = { 0 };
4322 total
= classifier_count_exact(&ofproto
->cls
);
4323 if (total
<= 1000) {
4324 return N_BUCKETS
* BUCKET_WIDTH
;
4327 /* Build histogram. */
4329 CLASSIFIER_FOR_EACH_EXACT_RULE (rule
, cr
, &ofproto
->cls
) {
4330 long long int idle
= now
- rule
->used
;
4331 int bucket
= (idle
<= 0 ? 0
4332 : idle
>= BUCKET_WIDTH
* N_BUCKETS
? N_BUCKETS
- 1
4333 : (unsigned int) idle
/ BUCKET_WIDTH
);
4337 /* Find the first bucket whose flows should be expired. */
4338 for (bucket
= 0; bucket
< N_BUCKETS
; bucket
++) {
4339 if (buckets
[bucket
]) {
4342 subtotal
+= buckets
[bucket
++];
4343 } while (bucket
< N_BUCKETS
&& subtotal
< MAX(1000, total
/ 100));
4348 if (VLOG_IS_DBG_ENABLED()) {
4352 ds_put_cstr(&s
, "keep");
4353 for (i
= 0; i
< N_BUCKETS
; i
++) {
4355 ds_put_cstr(&s
, ", drop");
4358 ds_put_format(&s
, " %d:%d", i
* BUCKET_WIDTH
, buckets
[i
]);
4361 VLOG_INFO("%s: %s (msec:count)",
4362 dpif_name(ofproto
->dpif
), ds_cstr(&s
));
4366 return bucket
* BUCKET_WIDTH
;
4370 rule_active_timeout(struct ofproto
*ofproto
, struct rule
*rule
)
4372 if (ofproto
->netflow
&& !is_controller_rule(rule
) &&
4373 netflow_active_timeout_expired(ofproto
->netflow
, &rule
->nf_flow
)) {
4374 struct ofexpired expired
;
4375 struct odp_flow odp_flow
;
4377 /* Get updated flow stats.
4379 * XXX We could avoid this call entirely if (1) ofproto_update_used()
4380 * updated TCP flags and (2) the dpif_flow_list_all() in
4381 * ofproto_update_used() zeroed TCP flags. */
4382 memset(&odp_flow
, 0, sizeof odp_flow
);
4383 if (rule
->installed
) {
4384 odp_flow_key_from_flow(&odp_flow
.key
, &rule
->cr
.flow
);
4385 odp_flow
.flags
= ODPFF_ZERO_TCP_FLAGS
;
4386 dpif_flow_get(ofproto
->dpif
, &odp_flow
);
4388 if (odp_flow
.stats
.n_packets
) {
4389 update_time(ofproto
, rule
, &odp_flow
.stats
);
4390 netflow_flow_update_flags(&rule
->nf_flow
,
4391 odp_flow
.stats
.tcp_flags
);
4395 expired
.flow
= rule
->cr
.flow
;
4396 expired
.packet_count
= rule
->packet_count
+
4397 odp_flow
.stats
.n_packets
;
4398 expired
.byte_count
= rule
->byte_count
+ odp_flow
.stats
.n_bytes
;
4399 expired
.used
= rule
->used
;
4401 netflow_expire(ofproto
->netflow
, &rule
->nf_flow
, &expired
);
4405 /* If 'cls_rule' is an OpenFlow rule, that has expired according to OpenFlow
4406 * rules, then delete it entirely.
4408 * If 'cls_rule' is a subrule, that has not been used recently, remove it from
4409 * the datapath and fold its statistics back into its super-rule.
4411 * (This is a callback function for classifier_for_each().) */
4413 rule_expire(struct cls_rule
*cls_rule
, void *cbdata_
)
4415 struct expire_cbdata
*cbdata
= cbdata_
;
4416 struct ofproto
*ofproto
= cbdata
->ofproto
;
4417 struct rule
*rule
= rule_from_cls_rule(cls_rule
);
4418 long long int hard_expire
, idle_expire
, expire
, now
;
4420 /* Calculate OpenFlow expiration times for 'rule'. */
4421 hard_expire
= (rule
->hard_timeout
4422 ? rule
->created
+ rule
->hard_timeout
* 1000
4424 idle_expire
= (rule
->idle_timeout
4425 && (rule
->super
|| list_is_empty(&rule
->list
))
4426 ? rule
->used
+ rule
->idle_timeout
* 1000
4428 expire
= MIN(hard_expire
, idle_expire
);
4432 /* 'rule' has not expired according to OpenFlow rules. */
4433 if (!rule
->cr
.wc
.wildcards
) {
4434 if (now
>= rule
->used
+ cbdata
->dp_max_idle
) {
4435 /* This rule is idle, so drop it to free up resources. */
4437 /* It's not part of the OpenFlow flow table, so we can
4438 * delete it entirely and fold its statistics into its
4440 rule_remove(ofproto
, rule
);
4442 /* It is part of the OpenFlow flow table, so we have to
4443 * keep the rule but we can at least uninstall it from the
4445 rule_uninstall(ofproto
, rule
);
4448 /* Send NetFlow active timeout if appropriate. */
4449 rule_active_timeout(cbdata
->ofproto
, rule
);
4453 /* 'rule' has expired according to OpenFlow rules. */
4454 COVERAGE_INC(ofproto_expired
);
4456 /* Update stats. (This is a no-op if the rule expired due to an idle
4457 * timeout, because that only happens when the rule has no subrules
4459 if (rule
->cr
.wc
.wildcards
) {
4460 struct rule
*subrule
, *next
;
4461 LIST_FOR_EACH_SAFE (subrule
, next
, list
, &rule
->list
) {
4462 rule_remove(cbdata
->ofproto
, subrule
);
4465 rule_uninstall(cbdata
->ofproto
, rule
);
4468 /* Get rid of the rule. */
4469 if (!rule_is_hidden(rule
)) {
4470 send_flow_removed(cbdata
->ofproto
, rule
, now
,
4472 ? OFPRR_HARD_TIMEOUT
: OFPRR_IDLE_TIMEOUT
));
4474 rule_remove(cbdata
->ofproto
, rule
);
4479 revalidate_cb(struct cls_rule
*sub_
, void *cbdata_
)
4481 struct rule
*sub
= rule_from_cls_rule(sub_
);
4482 struct revalidate_cbdata
*cbdata
= cbdata_
;
4484 if (cbdata
->revalidate_all
4485 || (cbdata
->revalidate_subrules
&& sub
->super
)
4486 || (tag_set_intersects(&cbdata
->revalidate_set
, sub
->tags
))) {
4487 revalidate_rule(cbdata
->ofproto
, sub
);
4492 revalidate_rule(struct ofproto
*p
, struct rule
*rule
)
4494 const struct flow
*flow
= &rule
->cr
.flow
;
4496 COVERAGE_INC(ofproto_revalidate_rule
);
4499 super
= rule_from_cls_rule(classifier_lookup(&p
->cls
, flow
,
4502 rule_remove(p
, rule
);
4504 } else if (super
!= rule
->super
) {
4505 COVERAGE_INC(ofproto_revalidate_moved
);
4506 list_remove(&rule
->list
);
4507 list_push_back(&super
->list
, &rule
->list
);
4508 rule
->super
= super
;
4509 rule
->hard_timeout
= super
->hard_timeout
;
4510 rule
->idle_timeout
= super
->idle_timeout
;
4511 rule
->created
= super
->created
;
4516 rule_update_actions(p
, rule
);
4520 static struct ofpbuf
*
4521 compose_flow_removed(struct ofconn
*ofconn
, const struct rule
*rule
,
4522 long long int now
, uint8_t reason
)
4524 struct ofp_flow_removed
*ofr
;
4526 long long int tdiff
= now
- rule
->created
;
4527 uint32_t sec
= tdiff
/ 1000;
4528 uint32_t msec
= tdiff
- (sec
* 1000);
4530 ofr
= make_openflow(sizeof *ofr
, OFPT_FLOW_REMOVED
, &buf
);
4531 flow_to_match(&rule
->cr
.flow
, rule
->cr
.wc
.wildcards
, ofconn
->flow_format
,
4533 ofr
->cookie
= rule
->flow_cookie
;
4534 ofr
->priority
= htons(rule
->cr
.priority
);
4535 ofr
->reason
= reason
;
4536 ofr
->duration_sec
= htonl(sec
);
4537 ofr
->duration_nsec
= htonl(msec
* 1000000);
4538 ofr
->idle_timeout
= htons(rule
->idle_timeout
);
4539 ofr
->packet_count
= htonll(rule
->packet_count
);
4540 ofr
->byte_count
= htonll(rule
->byte_count
);
4546 send_flow_removed(struct ofproto
*p
, struct rule
*rule
,
4547 long long int now
, uint8_t reason
)
4549 struct ofconn
*ofconn
;
4551 if (!rule
->send_flow_removed
) {
4555 LIST_FOR_EACH (ofconn
, node
, &p
->all_conns
) {
4558 if (!rconn_is_connected(ofconn
->rconn
)
4559 || !ofconn_receives_async_msgs(ofconn
)) {
4563 msg
= compose_flow_removed(ofconn
, rule
, now
, reason
);
4565 /* Account flow expirations under ofconn->reply_counter, the counter
4566 * for replies to OpenFlow requests. That works because preventing
4567 * OpenFlow requests from being processed also prevents new flows from
4568 * being added (and expiring). (It also prevents processing OpenFlow
4569 * requests that would not add new flows, so it is imperfect.) */
4570 queue_tx(msg
, ofconn
, ofconn
->reply_counter
);
4574 /* pinsched callback for sending 'packet' on 'ofconn'. */
4576 do_send_packet_in(struct ofpbuf
*packet
, void *ofconn_
)
4578 struct ofconn
*ofconn
= ofconn_
;
4580 rconn_send_with_limit(ofconn
->rconn
, packet
,
4581 ofconn
->packet_in_counter
, 100);
4584 /* Takes 'packet', which has been converted with do_convert_to_packet_in(), and
4585 * finalizes its content for sending on 'ofconn', and passes it to 'ofconn''s
4586 * packet scheduler for sending.
4588 * 'max_len' specifies the maximum number of bytes of the packet to send on
4589 * 'ofconn' (INT_MAX specifies no limit).
4591 * If 'clone' is true, the caller retains ownership of 'packet'. Otherwise,
4592 * ownership is transferred to this function. */
4594 schedule_packet_in(struct ofconn
*ofconn
, struct ofpbuf
*packet
, int max_len
,
4597 struct ofproto
*ofproto
= ofconn
->ofproto
;
4598 struct ofp_packet_in
*opi
= packet
->data
;
4599 uint16_t in_port
= ofp_port_to_odp_port(ntohs(opi
->in_port
));
4600 int send_len
, trim_size
;
4604 if (opi
->reason
== OFPR_ACTION
) {
4605 buffer_id
= UINT32_MAX
;
4606 } else if (ofproto
->fail_open
&& fail_open_is_active(ofproto
->fail_open
)) {
4607 buffer_id
= pktbuf_get_null();
4608 } else if (!ofconn
->pktbuf
) {
4609 buffer_id
= UINT32_MAX
;
4611 struct ofpbuf payload
;
4612 payload
.data
= opi
->data
;
4613 payload
.size
= packet
->size
- offsetof(struct ofp_packet_in
, data
);
4614 buffer_id
= pktbuf_save(ofconn
->pktbuf
, &payload
, in_port
);
4617 /* Figure out how much of the packet to send. */
4618 send_len
= ntohs(opi
->total_len
);
4619 if (buffer_id
!= UINT32_MAX
) {
4620 send_len
= MIN(send_len
, ofconn
->miss_send_len
);
4622 send_len
= MIN(send_len
, max_len
);
4624 /* Adjust packet length and clone if necessary. */
4625 trim_size
= offsetof(struct ofp_packet_in
, data
) + send_len
;
4627 packet
= ofpbuf_clone_data(packet
->data
, trim_size
);
4630 packet
->size
= trim_size
;
4633 /* Update packet headers. */
4634 opi
->buffer_id
= htonl(buffer_id
);
4635 update_openflow_length(packet
);
4637 /* Hand over to packet scheduler. It might immediately call into
4638 * do_send_packet_in() or it might buffer it for a while (until a later
4639 * call to pinsched_run()). */
4640 pinsched_send(ofconn
->schedulers
[opi
->reason
], in_port
,
4641 packet
, do_send_packet_in
, ofconn
);
4644 /* Replace struct odp_msg header in 'packet' by equivalent struct
4645 * ofp_packet_in. The odp_msg must have sufficient headroom to do so (e.g. as
4646 * returned by dpif_recv()).
4648 * The conversion is not complete: the caller still needs to trim any unneeded
4649 * payload off the end of the buffer, set the length in the OpenFlow header,
4650 * and set buffer_id. Those require us to know the controller settings and so
4651 * must be done on a per-controller basis.
4653 * Returns the maximum number of bytes of the packet that should be sent to
4654 * the controller (INT_MAX if no limit). */
4656 do_convert_to_packet_in(struct ofpbuf
*packet
)
4658 struct odp_msg
*msg
= packet
->data
;
4659 struct ofp_packet_in
*opi
;
4665 /* Extract relevant header fields */
4666 if (msg
->type
== _ODPL_ACTION_NR
) {
4667 reason
= OFPR_ACTION
;
4670 reason
= OFPR_NO_MATCH
;
4673 total_len
= msg
->length
- sizeof *msg
;
4674 in_port
= odp_port_to_ofp_port(msg
->port
);
4676 /* Repurpose packet buffer by overwriting header. */
4677 ofpbuf_pull(packet
, sizeof(struct odp_msg
));
4678 opi
= ofpbuf_push_zeros(packet
, offsetof(struct ofp_packet_in
, data
));
4679 opi
->header
.version
= OFP_VERSION
;
4680 opi
->header
.type
= OFPT_PACKET_IN
;
4681 opi
->total_len
= htons(total_len
);
4682 opi
->in_port
= htons(in_port
);
4683 opi
->reason
= reason
;
4688 /* Given 'packet' containing an odp_msg of type _ODPL_ACTION_NR or
4689 * _ODPL_MISS_NR, sends an OFPT_PACKET_IN message to each OpenFlow controller
4690 * as necessary according to their individual configurations.
4692 * 'packet' must have sufficient headroom to convert it into a struct
4693 * ofp_packet_in (e.g. as returned by dpif_recv()).
4695 * Takes ownership of 'packet'. */
4697 send_packet_in(struct ofproto
*ofproto
, struct ofpbuf
*packet
)
4699 struct ofconn
*ofconn
, *prev
;
4702 max_len
= do_convert_to_packet_in(packet
);
4705 LIST_FOR_EACH (ofconn
, node
, &ofproto
->all_conns
) {
4706 if (ofconn_receives_async_msgs(ofconn
)) {
4708 schedule_packet_in(prev
, packet
, max_len
, true);
4714 schedule_packet_in(prev
, packet
, max_len
, false);
4716 ofpbuf_delete(packet
);
4721 pick_datapath_id(const struct ofproto
*ofproto
)
4723 const struct ofport
*port
;
4725 port
= get_port(ofproto
, ODPP_LOCAL
);
4727 uint8_t ea
[ETH_ADDR_LEN
];
4730 error
= netdev_get_etheraddr(port
->netdev
, ea
);
4732 return eth_addr_to_uint64(ea
);
4734 VLOG_WARN("could not get MAC address for %s (%s)",
4735 netdev_get_name(port
->netdev
), strerror(error
));
4737 return ofproto
->fallback_dpid
;
4741 pick_fallback_dpid(void)
4743 uint8_t ea
[ETH_ADDR_LEN
];
4744 eth_addr_nicira_random(ea
);
4745 return eth_addr_to_uint64(ea
);
4749 default_normal_ofhook_cb(const struct flow
*flow
, const struct ofpbuf
*packet
,
4750 struct odp_actions
*actions
, tag_type
*tags
,
4751 uint16_t *nf_output_iface
, void *ofproto_
)
4753 struct ofproto
*ofproto
= ofproto_
;
4756 /* Drop frames for reserved multicast addresses. */
4757 if (eth_addr_is_reserved(flow
->dl_dst
)) {
4761 /* Learn source MAC (but don't try to learn from revalidation). */
4762 if (packet
!= NULL
) {
4763 tag_type rev_tag
= mac_learning_learn(ofproto
->ml
, flow
->dl_src
,
4765 GRAT_ARP_LOCK_NONE
);
4767 /* The log messages here could actually be useful in debugging,
4768 * so keep the rate limit relatively high. */
4769 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(30, 300);
4770 VLOG_DBG_RL(&rl
, "learned that "ETH_ADDR_FMT
" is on port %"PRIu16
,
4771 ETH_ADDR_ARGS(flow
->dl_src
), flow
->in_port
);
4772 ofproto_revalidate(ofproto
, rev_tag
);
4776 /* Determine output port. */
4777 out_port
= mac_learning_lookup_tag(ofproto
->ml
, flow
->dl_dst
, 0, tags
,
4780 flood_packets(ofproto
, flow
->in_port
, OFPPC_NO_FLOOD
,
4781 nf_output_iface
, actions
);
4782 } else if (out_port
!= flow
->in_port
) {
4783 odp_actions_add(actions
, ODPAT_OUTPUT
)->output
.port
= out_port
;
4784 *nf_output_iface
= out_port
;
4792 static const struct ofhooks default_ofhooks
= {
4793 default_normal_ofhook_cb
,