2 * Copyright (c) 2009, 2010 Nicira Networks.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at:
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
26 #include <netinet/in.h>
29 #include <sys/ioctl.h>
34 #include "dpif-provider.h"
40 #include "ofp-print.h"
43 #include "poll-loop.h"
49 #define THIS_MODULE VLM_dpif_netdev
51 /* Configuration parameters. */
52 enum { N_QUEUES = 2 }; /* Number of queues for dpif_recv(). */
53 enum { MAX_QUEUE_LEN = 100 }; /* Maximum number of packets per queue. */
54 enum { N_GROUPS = 16 }; /* Number of port groups. */
55 enum { MAX_PORTS = 256 }; /* Maximum number of ports. */
56 enum { MAX_FLOWS = 65536 }; /* Maximum number of flows in flow table. */
58 /* Enough headroom to add a vlan tag, plus an extra 2 bytes to allow IP
59 * headers to be aligned on a 4-byte boundary. */
60 enum { DP_NETDEV_HEADROOM = 2 + VLAN_HEADER_LEN };
62 /* Datapath based on the network device interface from netdev.h. */
69 bool drop_frags; /* Drop all IP fragments, if true. */
70 struct ovs_queue queues[N_QUEUES]; /* Messages queued for dpif_recv(). */
71 struct hmap flow_table; /* Flow table. */
72 struct odp_port_group groups[N_GROUPS];
75 long long int n_frags; /* Number of dropped IP fragments. */
76 long long int n_hit; /* Number of flow table matches. */
77 long long int n_missed; /* Number of flow table misses. */
78 long long int n_lost; /* Number of misses not passed to client. */
82 struct dp_netdev_port *ports[MAX_PORTS];
83 struct list port_list;
87 /* A port in a netdev-based datapath. */
88 struct dp_netdev_port {
89 int port_no; /* Index into dp_netdev's 'ports'. */
90 struct list node; /* Element in dp_netdev's 'port_list'. */
91 struct netdev *netdev;
92 bool internal; /* Internal port (as ODP_PORT_INTERNAL)? */
95 /* A flow in dp_netdev's 'flow_table'. */
96 struct dp_netdev_flow {
97 struct hmap_node node; /* Element in dp_netdev's 'flow_table'. */
101 struct timeval used; /* Last used time, in milliseconds. */
102 long long int packet_count; /* Number of packets matched. */
103 long long int byte_count; /* Number of bytes matched. */
104 uint8_t ip_tos; /* IP TOS value. */
105 uint16_t tcp_ctl; /* Bitwise-OR of seen tcp_ctl values. */
108 union odp_action *actions;
109 unsigned int n_actions;
112 /* Interface to netdev-based datapath. */
115 struct dp_netdev *dp;
117 unsigned int dp_serial;
120 /* All netdev-based datapaths. */
121 static struct dp_netdev *dp_netdevs[256];
122 struct list dp_netdev_list = LIST_INITIALIZER(&dp_netdev_list);
123 enum { N_DP_NETDEVS = ARRAY_SIZE(dp_netdevs) };
125 /* Maximum port MTU seen so far. */
126 static int max_mtu = ETH_PAYLOAD_MAX;
128 static int get_port_by_number(struct dp_netdev *, uint16_t port_no,
129 struct dp_netdev_port **portp);
130 static int get_port_by_name(struct dp_netdev *, const char *devname,
131 struct dp_netdev_port **portp);
132 static void dp_netdev_free(struct dp_netdev *);
133 static void dp_netdev_flow_flush(struct dp_netdev *);
134 static int do_add_port(struct dp_netdev *, const char *devname, uint16_t flags,
136 static int do_del_port(struct dp_netdev *, uint16_t port_no);
137 static int dp_netdev_output_control(struct dp_netdev *, const struct ofpbuf *,
138 int queue_no, int port_no, uint32_t arg);
139 static int dp_netdev_execute_actions(struct dp_netdev *,
140 struct ofpbuf *, flow_t *,
141 const union odp_action *, int n);
143 static struct dpif_netdev *
144 dpif_netdev_cast(const struct dpif *dpif)
146 dpif_assert_class(dpif, &dpif_netdev_class);
147 return CONTAINER_OF(dpif, struct dpif_netdev, dpif);
150 static struct dp_netdev *
151 get_dp_netdev(const struct dpif *dpif)
153 return dpif_netdev_cast(dpif)->dp;
157 name_to_dp_idx(const char *name)
159 if (!strncmp(name, "dp", 2) && isdigit((unsigned char)name[2])) {
160 int dp_idx = atoi(name + 2);
161 if (dp_idx >= 0 && dp_idx < N_DP_NETDEVS) {
168 static struct dp_netdev *
169 find_dp_netdev(const char *name)
174 dp_idx = name_to_dp_idx(name);
176 return dp_netdevs[dp_idx];
179 for (i = 0; i < N_DP_NETDEVS; i++) {
180 struct dp_netdev *dp = dp_netdevs[i];
182 struct dp_netdev_port *port;
183 if (!get_port_by_name(dp, name, &port)) {
192 create_dpif_netdev(struct dp_netdev *dp)
194 struct dpif_netdev *dpif;
199 dpname = xasprintf("dp%d", dp->dp_idx);
200 dpif = xmalloc(sizeof *dpif);
201 dpif_init(&dpif->dpif, &dpif_netdev_class, dpname, dp->dp_idx, dp->dp_idx);
203 dpif->listen_mask = 0;
204 dpif->dp_serial = dp->serial;
211 create_dp_netdev(const char *name, int dp_idx, struct dpif **dpifp)
213 struct dp_netdev *dp;
217 if (dp_netdevs[dp_idx]) {
221 /* Create datapath. */
222 dp_netdevs[dp_idx] = dp = xzalloc(sizeof *dp);
223 list_push_back(&dp_netdev_list, &dp->node);
226 dp->drop_frags = false;
227 for (i = 0; i < N_QUEUES; i++) {
228 queue_init(&dp->queues[i]);
230 hmap_init(&dp->flow_table);
231 for (i = 0; i < N_GROUPS; i++) {
232 dp->groups[i].ports = NULL;
233 dp->groups[i].n_ports = 0;
234 dp->groups[i].group = i;
236 list_init(&dp->port_list);
237 error = do_add_port(dp, name, ODP_PORT_INTERNAL, ODPP_LOCAL);
243 *dpifp = create_dpif_netdev(dp);
248 dpif_netdev_open(const char *name, const char *type OVS_UNUSED, bool create,
252 if (find_dp_netdev(name)) {
255 int dp_idx = name_to_dp_idx(name);
257 return create_dp_netdev(name, dp_idx, dpifp);
259 /* Scan for unused dp_idx number. */
260 for (dp_idx = 0; dp_idx < N_DP_NETDEVS; dp_idx++) {
261 int error = create_dp_netdev(name, dp_idx, dpifp);
262 if (error != EBUSY) {
267 /* All datapath numbers in use. */
272 struct dp_netdev *dp = find_dp_netdev(name);
274 *dpifp = create_dpif_netdev(dp);
283 dp_netdev_free(struct dp_netdev *dp)
287 dp_netdev_flow_flush(dp);
288 while (dp->n_ports > 0) {
289 struct dp_netdev_port *port = CONTAINER_OF(
290 dp->port_list.next, struct dp_netdev_port, node);
291 do_del_port(dp, port->port_no);
293 for (i = 0; i < N_QUEUES; i++) {
294 queue_destroy(&dp->queues[i]);
296 hmap_destroy(&dp->flow_table);
297 for (i = 0; i < N_GROUPS; i++) {
298 free(dp->groups[i].ports);
300 dp_netdevs[dp->dp_idx] = NULL;
301 list_remove(&dp->node);
306 dpif_netdev_close(struct dpif *dpif)
308 struct dp_netdev *dp = get_dp_netdev(dpif);
309 assert(dp->open_cnt > 0);
310 if (--dp->open_cnt == 0 && dp->destroyed) {
317 dpif_netdev_destroy(struct dpif *dpif)
319 struct dp_netdev *dp = get_dp_netdev(dpif);
320 dp->destroyed = true;
325 dpif_netdev_get_stats(const struct dpif *dpif, struct odp_stats *stats)
327 struct dp_netdev *dp = get_dp_netdev(dpif);
328 memset(stats, 0, sizeof *stats);
329 stats->n_flows = hmap_count(&dp->flow_table);
330 stats->cur_capacity = hmap_capacity(&dp->flow_table);
331 stats->max_capacity = MAX_FLOWS;
332 stats->n_ports = dp->n_ports;
333 stats->max_ports = MAX_PORTS;
334 stats->max_groups = N_GROUPS;
335 stats->n_frags = dp->n_frags;
336 stats->n_hit = dp->n_hit;
337 stats->n_missed = dp->n_missed;
338 stats->n_lost = dp->n_lost;
339 stats->max_miss_queue = MAX_QUEUE_LEN;
340 stats->max_action_queue = MAX_QUEUE_LEN;
345 dpif_netdev_get_drop_frags(const struct dpif *dpif, bool *drop_fragsp)
347 struct dp_netdev *dp = get_dp_netdev(dpif);
348 *drop_fragsp = dp->drop_frags;
353 dpif_netdev_set_drop_frags(struct dpif *dpif, bool drop_frags)
355 struct dp_netdev *dp = get_dp_netdev(dpif);
356 dp->drop_frags = drop_frags;
361 do_add_port(struct dp_netdev *dp, const char *devname, uint16_t flags,
364 bool internal = (flags & ODP_PORT_INTERNAL) != 0;
365 struct dp_netdev_port *port;
366 struct netdev_options netdev_options;
367 struct netdev *netdev;
371 /* XXX reject devices already in some dp_netdev. */
373 /* Open and validate network device. */
374 memset(&netdev_options, 0, sizeof netdev_options);
375 netdev_options.name = devname;
376 netdev_options.ethertype = NETDEV_ETH_TYPE_ANY;
377 netdev_options.may_create = true;
379 netdev_options.type = "tap";
381 netdev_options.may_open = true;
384 error = netdev_open(&netdev_options, &netdev);
388 /* XXX reject loopback devices */
389 /* XXX reject non-Ethernet devices */
391 error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, false);
393 netdev_close(netdev);
397 port = xmalloc(sizeof *port);
398 port->port_no = port_no;
399 port->netdev = netdev;
400 port->internal = internal;
402 netdev_get_mtu(netdev, &mtu);
407 list_push_back(&dp->port_list, &port->node);
408 dp->ports[port_no] = port;
416 dpif_netdev_port_add(struct dpif *dpif, const char *devname, uint16_t flags,
419 struct dp_netdev *dp = get_dp_netdev(dpif);
422 for (port_no = 0; port_no < MAX_PORTS; port_no++) {
423 if (!dp->ports[port_no]) {
425 return do_add_port(dp, devname, flags, port_no);
432 dpif_netdev_port_del(struct dpif *dpif, uint16_t port_no)
434 struct dp_netdev *dp = get_dp_netdev(dpif);
435 return port_no == ODPP_LOCAL ? EINVAL : do_del_port(dp, port_no);
439 is_valid_port_number(uint16_t port_no)
441 return port_no < MAX_PORTS;
445 get_port_by_number(struct dp_netdev *dp,
446 uint16_t port_no, struct dp_netdev_port **portp)
448 if (!is_valid_port_number(port_no)) {
452 *portp = dp->ports[port_no];
453 return *portp ? 0 : ENOENT;
458 get_port_by_name(struct dp_netdev *dp,
459 const char *devname, struct dp_netdev_port **portp)
461 struct dp_netdev_port *port;
463 LIST_FOR_EACH (port, struct dp_netdev_port, node, &dp->port_list) {
464 if (!strcmp(netdev_get_name(port->netdev), devname)) {
473 do_del_port(struct dp_netdev *dp, uint16_t port_no)
475 struct dp_netdev_port *port;
479 error = get_port_by_number(dp, port_no, &port);
484 list_remove(&port->node);
485 dp->ports[port->port_no] = NULL;
489 name = xstrdup(netdev_get_name(port->netdev));
490 netdev_close(port->netdev);
499 answer_port_query(const struct dp_netdev_port *port, struct odp_port *odp_port)
501 memset(odp_port, 0, sizeof *odp_port);
502 ovs_strlcpy(odp_port->devname, netdev_get_name(port->netdev),
503 sizeof odp_port->devname);
504 odp_port->port = port->port_no;
505 odp_port->flags = port->internal ? ODP_PORT_INTERNAL : 0;
509 dpif_netdev_port_query_by_number(const struct dpif *dpif, uint16_t port_no,
510 struct odp_port *odp_port)
512 struct dp_netdev *dp = get_dp_netdev(dpif);
513 struct dp_netdev_port *port;
516 error = get_port_by_number(dp, port_no, &port);
518 answer_port_query(port, odp_port);
524 dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname,
525 struct odp_port *odp_port)
527 struct dp_netdev *dp = get_dp_netdev(dpif);
528 struct dp_netdev_port *port;
531 error = get_port_by_name(dp, devname, &port);
533 answer_port_query(port, odp_port);
539 dp_netdev_free_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow)
541 hmap_remove(&dp->flow_table, &flow->node);
547 dp_netdev_flow_flush(struct dp_netdev *dp)
549 struct dp_netdev_flow *flow, *next;
551 HMAP_FOR_EACH_SAFE (flow, next, struct dp_netdev_flow, node,
553 dp_netdev_free_flow(dp, flow);
558 dpif_netdev_flow_flush(struct dpif *dpif)
560 struct dp_netdev *dp = get_dp_netdev(dpif);
561 dp_netdev_flow_flush(dp);
566 dpif_netdev_port_list(const struct dpif *dpif, struct odp_port *ports, int n)
568 struct dp_netdev *dp = get_dp_netdev(dpif);
569 struct dp_netdev_port *port;
573 LIST_FOR_EACH (port, struct dp_netdev_port, node, &dp->port_list) {
574 struct odp_port *odp_port = &ports[i];
578 answer_port_query(port, odp_port);
585 dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED)
587 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
588 if (dpif->dp_serial != dpif->dp->serial) {
589 dpif->dp_serial = dpif->dp->serial;
597 dpif_netdev_port_poll_wait(const struct dpif *dpif_)
599 struct dpif_netdev *dpif = dpif_netdev_cast(dpif_);
600 if (dpif->dp_serial != dpif->dp->serial) {
601 poll_immediate_wake();
606 get_port_group(const struct dpif *dpif, int group_no,
607 struct odp_port_group **groupp)
609 struct dp_netdev *dp = get_dp_netdev(dpif);
611 if (group_no >= 0 && group_no < N_GROUPS) {
612 *groupp = &dp->groups[group_no];
621 dpif_netdev_port_group_get(const struct dpif *dpif, int group_no,
622 uint16_t ports[], int n)
624 struct odp_port_group *group;
631 error = get_port_group(dpif, group_no, &group);
633 memcpy(ports, group->ports, MIN(n, group->n_ports) * sizeof *ports);
634 return group->n_ports;
641 dpif_netdev_port_group_set(struct dpif *dpif, int group_no,
642 const uint16_t ports[], int n)
644 struct odp_port_group *group;
647 if (n < 0 || n > MAX_PORTS) {
651 error = get_port_group(dpif, group_no, &group);
654 group->ports = xmemdup(ports, n * sizeof *group->ports);
656 group->group = group_no;
661 static struct dp_netdev_flow *
662 dp_netdev_lookup_flow(const struct dp_netdev *dp, const flow_t *key)
664 struct dp_netdev_flow *flow;
666 assert(!key->reserved[0] && !key->reserved[1] && !key->reserved[2]);
667 HMAP_FOR_EACH_WITH_HASH (flow, struct dp_netdev_flow, node,
668 flow_hash(key, 0), &dp->flow_table) {
669 if (flow_equal(&flow->key, key)) {
677 answer_flow_query(struct dp_netdev_flow *flow, uint32_t query_flags,
678 struct odp_flow *odp_flow)
681 odp_flow->key = flow->key;
682 odp_flow->stats.n_packets = flow->packet_count;
683 odp_flow->stats.n_bytes = flow->byte_count;
684 odp_flow->stats.used_sec = flow->used.tv_sec;
685 odp_flow->stats.used_nsec = flow->used.tv_usec * 1000;
686 odp_flow->stats.tcp_flags = TCP_FLAGS(flow->tcp_ctl);
687 odp_flow->stats.ip_tos = flow->ip_tos;
688 odp_flow->stats.error = 0;
689 if (odp_flow->n_actions > 0) {
690 unsigned int n = MIN(odp_flow->n_actions, flow->n_actions);
691 memcpy(odp_flow->actions, flow->actions,
692 n * sizeof *odp_flow->actions);
693 odp_flow->n_actions = flow->n_actions;
696 if (query_flags & ODPFF_ZERO_TCP_FLAGS) {
701 odp_flow->stats.error = ENOENT;
706 dpif_netdev_flow_get(const struct dpif *dpif, struct odp_flow flows[], int n)
708 struct dp_netdev *dp = get_dp_netdev(dpif);
711 for (i = 0; i < n; i++) {
712 struct odp_flow *odp_flow = &flows[i];
713 answer_flow_query(dp_netdev_lookup_flow(dp, &odp_flow->key),
714 odp_flow->flags, odp_flow);
720 dpif_netdev_validate_actions(const union odp_action *actions, int n_actions,
726 for (i = 0; i < n_actions; i++) {
727 const union odp_action *a = &actions[i];
730 if (a->output.port >= MAX_PORTS) {
735 case ODPAT_OUTPUT_GROUP:
737 if (a->output_group.group >= N_GROUPS) {
742 case ODPAT_CONTROLLER:
745 case ODPAT_SET_VLAN_VID:
747 if (a->vlan_vid.vlan_vid & htons(~VLAN_VID_MASK)) {
752 case ODPAT_SET_VLAN_PCP:
754 if (a->vlan_pcp.vlan_pcp & ~VLAN_PCP_MASK) {
759 case ODPAT_STRIP_VLAN:
760 case ODPAT_SET_DL_SRC:
761 case ODPAT_SET_DL_DST:
762 case ODPAT_SET_NW_SRC:
763 case ODPAT_SET_NW_DST:
764 case ODPAT_SET_NW_TOS:
765 case ODPAT_SET_TP_SRC:
766 case ODPAT_SET_TP_DST:
778 set_flow_actions(struct dp_netdev_flow *flow, struct odp_flow *odp_flow)
784 if (odp_flow->n_actions >= 4096 / sizeof *odp_flow->actions) {
787 error = dpif_netdev_validate_actions(odp_flow->actions,
788 odp_flow->n_actions, &mutates);
793 n_bytes = odp_flow->n_actions * sizeof *flow->actions;
794 flow->actions = xrealloc(flow->actions, n_bytes);
795 flow->n_actions = odp_flow->n_actions;
796 memcpy(flow->actions, odp_flow->actions, n_bytes);
801 add_flow(struct dpif *dpif, struct odp_flow *odp_flow)
803 struct dp_netdev *dp = get_dp_netdev(dpif);
804 struct dp_netdev_flow *flow;
807 flow = xzalloc(sizeof *flow);
808 flow->key = odp_flow->key;
809 memset(flow->key.reserved, 0, sizeof flow->key.reserved);
811 error = set_flow_actions(flow, odp_flow);
817 hmap_insert(&dp->flow_table, &flow->node, flow_hash(&flow->key, 0));
822 clear_stats(struct dp_netdev_flow *flow)
824 flow->used.tv_sec = 0;
825 flow->used.tv_usec = 0;
826 flow->packet_count = 0;
827 flow->byte_count = 0;
833 dpif_netdev_flow_put(struct dpif *dpif, struct odp_flow_put *put)
835 struct dp_netdev *dp = get_dp_netdev(dpif);
836 struct dp_netdev_flow *flow;
838 flow = dp_netdev_lookup_flow(dp, &put->flow.key);
840 if (put->flags & ODPPF_CREATE) {
841 if (hmap_count(&dp->flow_table) < MAX_FLOWS) {
842 return add_flow(dpif, &put->flow);
850 if (put->flags & ODPPF_MODIFY) {
851 int error = set_flow_actions(flow, &put->flow);
852 if (!error && put->flags & ODPPF_ZERO_STATS) {
864 dpif_netdev_flow_del(struct dpif *dpif, struct odp_flow *odp_flow)
866 struct dp_netdev *dp = get_dp_netdev(dpif);
867 struct dp_netdev_flow *flow;
869 flow = dp_netdev_lookup_flow(dp, &odp_flow->key);
871 answer_flow_query(flow, 0, odp_flow);
872 dp_netdev_free_flow(dp, flow);
880 dpif_netdev_flow_list(const struct dpif *dpif, struct odp_flow flows[], int n)
882 struct dp_netdev *dp = get_dp_netdev(dpif);
883 struct dp_netdev_flow *flow;
887 HMAP_FOR_EACH (flow, struct dp_netdev_flow, node, &dp->flow_table) {
891 answer_flow_query(flow, 0, &flows[i++]);
893 return hmap_count(&dp->flow_table);
897 dpif_netdev_execute(struct dpif *dpif, uint16_t in_port,
898 const union odp_action actions[], int n_actions,
899 const struct ofpbuf *packet)
901 struct dp_netdev *dp = get_dp_netdev(dpif);
907 if (packet->size < ETH_HEADER_LEN || packet->size > UINT16_MAX) {
911 error = dpif_netdev_validate_actions(actions, n_actions, &mutates);
917 /* We need a deep copy of 'packet' since we're going to modify its
919 ofpbuf_init(©, DP_NETDEV_HEADROOM + packet->size);
920 copy.data = (char*)copy.base + DP_NETDEV_HEADROOM;
921 ofpbuf_put(©, packet->data, packet->size);
923 /* We still need a shallow copy of 'packet', even though we won't
924 * modify its data, because flow_extract() modifies packet->l2, etc.
925 * We could probably get away with modifying those but it's more polite
929 flow_extract(©, in_port, &flow);
930 error = dp_netdev_execute_actions(dp, ©, &flow, actions, n_actions);
932 ofpbuf_uninit(©);
938 dpif_netdev_recv_get_mask(const struct dpif *dpif, int *listen_mask)
940 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
941 *listen_mask = dpif_netdev->listen_mask;
946 dpif_netdev_recv_set_mask(struct dpif *dpif, int listen_mask)
948 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
949 if (!(listen_mask & ~ODPL_ALL)) {
950 dpif_netdev->listen_mask = listen_mask;
957 static struct ovs_queue *
958 find_nonempty_queue(struct dpif *dpif)
960 struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif);
961 struct dp_netdev *dp = get_dp_netdev(dpif);
962 int mask = dpif_netdev->listen_mask;
965 for (i = 0; i < N_QUEUES; i++) {
966 struct ovs_queue *q = &dp->queues[i];
967 if (q->n && mask & (1u << i)) {
975 dpif_netdev_recv(struct dpif *dpif, struct ofpbuf **bufp)
977 struct ovs_queue *q = find_nonempty_queue(dpif);
979 *bufp = queue_pop_head(q);
987 dpif_netdev_recv_wait(struct dpif *dpif)
989 struct ovs_queue *q = find_nonempty_queue(dpif);
991 poll_immediate_wake();
993 /* No messages ready to be received, and dp_wait() will ensure that we
994 * wake up to queue new messages, so there is nothing to do. */
999 dp_netdev_flow_used(struct dp_netdev_flow *flow, const flow_t *key,
1000 const struct ofpbuf *packet)
1002 time_timeval(&flow->used);
1003 flow->packet_count++;
1004 flow->byte_count += packet->size;
1005 if (key->dl_type == htons(ETH_TYPE_IP)) {
1006 struct ip_header *nh = packet->l3;
1007 flow->ip_tos = nh->ip_tos;
1009 if (key->nw_proto == IPPROTO_TCP) {
1010 struct tcp_header *th = packet->l4;
1011 flow->tcp_ctl |= th->tcp_ctl;
1017 dp_netdev_port_input(struct dp_netdev *dp, struct dp_netdev_port *port,
1018 struct ofpbuf *packet)
1020 struct dp_netdev_flow *flow;
1023 if (flow_extract(packet, port->port_no, &key) && dp->drop_frags) {
1028 flow = dp_netdev_lookup_flow(dp, &key);
1030 dp_netdev_flow_used(flow, &key, packet);
1031 dp_netdev_execute_actions(dp, packet, &key,
1032 flow->actions, flow->n_actions);
1036 dp_netdev_output_control(dp, packet, _ODPL_MISS_NR, port->port_no, 0);
1043 struct ofpbuf packet;
1044 struct dp_netdev *dp;
1046 ofpbuf_init(&packet, DP_NETDEV_HEADROOM + max_mtu);
1047 LIST_FOR_EACH (dp, struct dp_netdev, node, &dp_netdev_list) {
1048 struct dp_netdev_port *port;
1050 LIST_FOR_EACH (port, struct dp_netdev_port, node, &dp->port_list) {
1053 /* Reset packet contents. */
1054 packet.data = (char*)packet.base + DP_NETDEV_HEADROOM;
1057 error = netdev_recv(port->netdev, &packet);
1059 dp_netdev_port_input(dp, port, &packet);
1060 } else if (error != EAGAIN) {
1061 struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5);
1062 VLOG_ERR_RL(&rl, "error receiving data from %s: %s",
1063 netdev_get_name(port->netdev), strerror(error));
1067 ofpbuf_uninit(&packet);
1071 dp_netdev_wait(void)
1073 struct dp_netdev *dp;
1075 LIST_FOR_EACH (dp, struct dp_netdev, node, &dp_netdev_list) {
1076 struct dp_netdev_port *port;
1077 LIST_FOR_EACH (port, struct dp_netdev_port, node, &dp->port_list) {
1078 netdev_recv_wait(port->netdev);
1084 dp_netdev_modify_vlan_tci(struct ofpbuf *packet, flow_t *key,
1085 uint16_t tci, uint16_t mask)
1087 struct vlan_eth_header *veh;
1089 if (key->dl_vlan != htons(ODP_VLAN_NONE)) {
1090 /* Modify 'mask' bits, but maintain other TCI bits. */
1092 veh->veth_tci &= ~htons(mask);
1093 veh->veth_tci |= htons(tci);
1095 /* Insert new 802.1Q header. */
1096 struct eth_header *eh = packet->l2;
1097 struct vlan_eth_header tmp;
1098 memcpy(tmp.veth_dst, eh->eth_dst, ETH_ADDR_LEN);
1099 memcpy(tmp.veth_src, eh->eth_src, ETH_ADDR_LEN);
1100 tmp.veth_type = htons(ETH_TYPE_VLAN);
1101 tmp.veth_tci = htons(tci);
1102 tmp.veth_next_type = eh->eth_type;
1104 veh = ofpbuf_push_uninit(packet, VLAN_HEADER_LEN);
1105 memcpy(veh, &tmp, sizeof tmp);
1106 packet->l2 = (char*)packet->l2 - VLAN_HEADER_LEN;
1109 key->dl_vlan = veh->veth_tci & htons(VLAN_VID_MASK);
1113 dp_netdev_strip_vlan(struct ofpbuf *packet, flow_t *key)
1115 struct vlan_eth_header *veh = packet->l2;
1116 if (veh->veth_type == htons(ETH_TYPE_VLAN)) {
1117 struct eth_header tmp;
1119 memcpy(tmp.eth_dst, veh->veth_dst, ETH_ADDR_LEN);
1120 memcpy(tmp.eth_src, veh->veth_src, ETH_ADDR_LEN);
1121 tmp.eth_type = veh->veth_next_type;
1123 packet->size -= VLAN_HEADER_LEN;
1124 packet->data = (char*)packet->data + VLAN_HEADER_LEN;
1125 packet->l2 = (char*)packet->l2 + VLAN_HEADER_LEN;
1126 memcpy(packet->data, &tmp, sizeof tmp);
1128 key->dl_vlan = htons(ODP_VLAN_NONE);
1133 dp_netdev_set_dl_src(struct ofpbuf *packet,
1134 const uint8_t dl_addr[ETH_ADDR_LEN])
1136 struct eth_header *eh = packet->l2;
1137 memcpy(eh->eth_src, dl_addr, sizeof eh->eth_src);
1141 dp_netdev_set_dl_dst(struct ofpbuf *packet,
1142 const uint8_t dl_addr[ETH_ADDR_LEN])
1144 struct eth_header *eh = packet->l2;
1145 memcpy(eh->eth_dst, dl_addr, sizeof eh->eth_dst);
1149 dp_netdev_set_nw_addr(struct ofpbuf *packet, flow_t *key,
1150 const struct odp_action_nw_addr *a)
1152 if (key->dl_type == htons(ETH_TYPE_IP)) {
1153 struct ip_header *nh = packet->l3;
1156 field = a->type == ODPAT_SET_NW_SRC ? &nh->ip_src : &nh->ip_dst;
1157 if (key->nw_proto == IP_TYPE_TCP) {
1158 struct tcp_header *th = packet->l4;
1159 th->tcp_csum = recalc_csum32(th->tcp_csum, *field, a->nw_addr);
1160 } else if (key->nw_proto == IP_TYPE_UDP) {
1161 struct udp_header *uh = packet->l4;
1163 uh->udp_csum = recalc_csum32(uh->udp_csum, *field, a->nw_addr);
1164 if (!uh->udp_csum) {
1165 uh->udp_csum = 0xffff;
1169 nh->ip_csum = recalc_csum32(nh->ip_csum, *field, a->nw_addr);
1170 *field = a->nw_addr;
1175 dp_netdev_set_nw_tos(struct ofpbuf *packet, flow_t *key,
1176 const struct odp_action_nw_tos *a)
1178 if (key->dl_type == htons(ETH_TYPE_IP)) {
1179 struct ip_header *nh = packet->l3;
1180 uint8_t *field = &nh->ip_tos;
1182 /* We only set the lower 6 bits. */
1183 uint8_t new = (a->nw_tos & 0x3f) | (nh->ip_tos & 0xc0);
1185 nh->ip_csum = recalc_csum16(nh->ip_csum, htons((uint16_t)*field),
1186 htons((uint16_t)a->nw_tos));
1192 dp_netdev_set_tp_port(struct ofpbuf *packet, flow_t *key,
1193 const struct odp_action_tp_port *a)
1195 if (key->dl_type == htons(ETH_TYPE_IP)) {
1197 if (key->nw_proto == IPPROTO_TCP) {
1198 struct tcp_header *th = packet->l4;
1199 field = a->type == ODPAT_SET_TP_SRC ? &th->tcp_src : &th->tcp_dst;
1200 th->tcp_csum = recalc_csum16(th->tcp_csum, *field, a->tp_port);
1201 *field = a->tp_port;
1202 } else if (key->nw_proto == IPPROTO_UDP) {
1203 struct udp_header *uh = packet->l4;
1204 field = a->type == ODPAT_SET_TP_SRC ? &uh->udp_src : &uh->udp_dst;
1205 uh->udp_csum = recalc_csum16(uh->udp_csum, *field, a->tp_port);
1206 *field = a->tp_port;
1212 dp_netdev_output_port(struct dp_netdev *dp, struct ofpbuf *packet,
1215 struct dp_netdev_port *p = dp->ports[out_port];
1217 netdev_send(p->netdev, packet);
1222 dp_netdev_output_group(struct dp_netdev *dp, uint16_t group, uint16_t in_port,
1223 struct ofpbuf *packet)
1225 struct odp_port_group *g = &dp->groups[group];
1228 for (i = 0; i < g->n_ports; i++) {
1229 uint16_t out_port = g->ports[i];
1230 if (out_port != in_port) {
1231 dp_netdev_output_port(dp, packet, out_port);
1237 dp_netdev_output_control(struct dp_netdev *dp, const struct ofpbuf *packet,
1238 int queue_no, int port_no, uint32_t arg)
1240 struct ovs_queue *q = &dp->queues[queue_no];
1241 struct odp_msg *header;
1245 if (q->n >= MAX_QUEUE_LEN) {
1250 msg_size = sizeof *header + packet->size;
1251 msg = ofpbuf_new(msg_size);
1252 header = ofpbuf_put_uninit(msg, sizeof *header);
1253 header->type = queue_no;
1254 header->length = msg_size;
1255 header->port = port_no;
1257 ofpbuf_put(msg, packet->data, packet->size);
1258 queue_push_tail(q, msg);
1264 dp_netdev_execute_actions(struct dp_netdev *dp,
1265 struct ofpbuf *packet, flow_t *key,
1266 const union odp_action *actions, int n_actions)
1269 for (i = 0; i < n_actions; i++) {
1270 const union odp_action *a = &actions[i];
1274 dp_netdev_output_port(dp, packet, a->output.port);
1277 case ODPAT_OUTPUT_GROUP:
1278 dp_netdev_output_group(dp, a->output_group.group, key->in_port,
1282 case ODPAT_CONTROLLER:
1283 dp_netdev_output_control(dp, packet, _ODPL_ACTION_NR,
1284 key->in_port, a->controller.arg);
1287 case ODPAT_SET_VLAN_VID:
1288 dp_netdev_modify_vlan_tci(packet, key, ntohs(a->vlan_vid.vlan_vid),
1292 case ODPAT_SET_VLAN_PCP:
1293 dp_netdev_modify_vlan_tci(packet, key, a->vlan_pcp.vlan_pcp << 13,
1297 case ODPAT_STRIP_VLAN:
1298 dp_netdev_strip_vlan(packet, key);
1301 case ODPAT_SET_DL_SRC:
1302 dp_netdev_set_dl_src(packet, a->dl_addr.dl_addr);
1305 case ODPAT_SET_DL_DST:
1306 dp_netdev_set_dl_dst(packet, a->dl_addr.dl_addr);
1309 case ODPAT_SET_NW_SRC:
1310 case ODPAT_SET_NW_DST:
1311 dp_netdev_set_nw_addr(packet, key, &a->nw_addr);
1314 case ODPAT_SET_NW_TOS:
1315 dp_netdev_set_nw_tos(packet, key, &a->nw_tos);
1318 case ODPAT_SET_TP_SRC:
1319 case ODPAT_SET_TP_DST:
1320 dp_netdev_set_tp_port(packet, key, &a->tp_port);
1327 const struct dpif_class dpif_netdev_class = {
1331 NULL, /* enumerate */
1334 NULL, /* get_all_names */
1335 dpif_netdev_destroy,
1336 dpif_netdev_get_stats,
1337 dpif_netdev_get_drop_frags,
1338 dpif_netdev_set_drop_frags,
1339 dpif_netdev_port_add,
1340 dpif_netdev_port_del,
1341 dpif_netdev_port_query_by_number,
1342 dpif_netdev_port_query_by_name,
1343 dpif_netdev_port_list,
1344 dpif_netdev_port_poll,
1345 dpif_netdev_port_poll_wait,
1346 dpif_netdev_port_group_get,
1347 dpif_netdev_port_group_set,
1348 dpif_netdev_flow_get,
1349 dpif_netdev_flow_put,
1350 dpif_netdev_flow_del,
1351 dpif_netdev_flow_flush,
1352 dpif_netdev_flow_list,
1353 dpif_netdev_execute,
1354 dpif_netdev_recv_get_mask,
1355 dpif_netdev_recv_set_mask,
1356 NULL, /* get_sflow_probability */
1357 NULL, /* set_sflow_probability */
1359 dpif_netdev_recv_wait,