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72865317 | 1 | /* |
149f577a | 2 | * Copyright (c) 2009, 2010 Nicira Networks. |
72865317 BP |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | #include <config.h> | |
18 | #include "dpif.h" | |
19 | ||
20 | #include <assert.h> | |
21 | #include <ctype.h> | |
22 | #include <errno.h> | |
23 | #include <fcntl.h> | |
24 | #include <inttypes.h> | |
72865317 | 25 | #include <netinet/in.h> |
9d82ec47 | 26 | #include <sys/socket.h> |
7f3adc00 | 27 | #include <net/if.h> |
cdee00fd | 28 | #include <stdint.h> |
72865317 BP |
29 | #include <stdlib.h> |
30 | #include <string.h> | |
31 | #include <sys/ioctl.h> | |
32 | #include <sys/stat.h> | |
72865317 BP |
33 | #include <unistd.h> |
34 | ||
35 | #include "csum.h" | |
614c4892 | 36 | #include "dpif.h" |
72865317 | 37 | #include "dpif-provider.h" |
614c4892 | 38 | #include "dummy.h" |
72865317 BP |
39 | #include "flow.h" |
40 | #include "hmap.h" | |
41 | #include "list.h" | |
42 | #include "netdev.h" | |
cdee00fd | 43 | #include "netlink.h" |
72865317 BP |
44 | #include "odp-util.h" |
45 | #include "ofp-print.h" | |
46 | #include "ofpbuf.h" | |
47 | #include "packets.h" | |
48 | #include "poll-loop.h" | |
462278db | 49 | #include "shash.h" |
72865317 BP |
50 | #include "timeval.h" |
51 | #include "util.h" | |
72865317 | 52 | #include "vlog.h" |
5136ce49 | 53 | |
d98e6007 | 54 | VLOG_DEFINE_THIS_MODULE(dpif_netdev); |
72865317 BP |
55 | |
56 | /* Configuration parameters. */ | |
57 | enum { N_QUEUES = 2 }; /* Number of queues for dpif_recv(). */ | |
58 | enum { MAX_QUEUE_LEN = 100 }; /* Maximum number of packets per queue. */ | |
72865317 BP |
59 | enum { MAX_PORTS = 256 }; /* Maximum number of ports. */ |
60 | enum { MAX_FLOWS = 65536 }; /* Maximum number of flows in flow table. */ | |
61 | ||
62 | /* Enough headroom to add a vlan tag, plus an extra 2 bytes to allow IP | |
63 | * headers to be aligned on a 4-byte boundary. */ | |
64 | enum { DP_NETDEV_HEADROOM = 2 + VLAN_HEADER_LEN }; | |
65 | ||
66 | /* Datapath based on the network device interface from netdev.h. */ | |
67 | struct dp_netdev { | |
614c4892 | 68 | const struct dpif_class *class; |
462278db | 69 | char *name; |
72865317 | 70 | int open_cnt; |
7dab847a | 71 | bool destroyed; |
72865317 BP |
72 | |
73 | bool drop_frags; /* Drop all IP fragments, if true. */ | |
b3907fbc BP |
74 | struct list queues[N_QUEUES]; /* Contain ofpbufs queued for dpif_recv(). */ |
75 | size_t queue_len[N_QUEUES]; /* Number of packets in each queue. */ | |
72865317 | 76 | struct hmap flow_table; /* Flow table. */ |
72865317 BP |
77 | |
78 | /* Statistics. */ | |
79 | long long int n_frags; /* Number of dropped IP fragments. */ | |
80 | long long int n_hit; /* Number of flow table matches. */ | |
81 | long long int n_missed; /* Number of flow table misses. */ | |
82 | long long int n_lost; /* Number of misses not passed to client. */ | |
83 | ||
84 | /* Ports. */ | |
85 | int n_ports; | |
86 | struct dp_netdev_port *ports[MAX_PORTS]; | |
87 | struct list port_list; | |
88 | unsigned int serial; | |
89 | }; | |
90 | ||
91 | /* A port in a netdev-based datapath. */ | |
92 | struct dp_netdev_port { | |
93 | int port_no; /* Index into dp_netdev's 'ports'. */ | |
94 | struct list node; /* Element in dp_netdev's 'port_list'. */ | |
95 | struct netdev *netdev; | |
c3827f61 | 96 | bool internal; /* Internal port? */ |
72865317 BP |
97 | }; |
98 | ||
99 | /* A flow in dp_netdev's 'flow_table'. */ | |
100 | struct dp_netdev_flow { | |
101 | struct hmap_node node; /* Element in dp_netdev's 'flow_table'. */ | |
14608a15 | 102 | struct flow key; |
72865317 BP |
103 | |
104 | /* Statistics. */ | |
2105ccc8 BP |
105 | struct timespec used; /* Last used time. */ |
106 | long long int packet_count; /* Number of packets matched. */ | |
107 | long long int byte_count; /* Number of bytes matched. */ | |
108 | uint16_t tcp_ctl; /* Bitwise-OR of seen tcp_ctl values. */ | |
72865317 BP |
109 | |
110 | /* Actions. */ | |
cdee00fd | 111 | struct nlattr *actions; |
cf22f8cb | 112 | size_t actions_len; |
72865317 BP |
113 | }; |
114 | ||
115 | /* Interface to netdev-based datapath. */ | |
116 | struct dpif_netdev { | |
117 | struct dpif dpif; | |
118 | struct dp_netdev *dp; | |
119 | int listen_mask; | |
120 | unsigned int dp_serial; | |
121 | }; | |
122 | ||
123 | /* All netdev-based datapaths. */ | |
462278db | 124 | static struct shash dp_netdevs = SHASH_INITIALIZER(&dp_netdevs); |
72865317 BP |
125 | |
126 | /* Maximum port MTU seen so far. */ | |
127 | static int max_mtu = ETH_PAYLOAD_MAX; | |
128 | ||
129 | static int get_port_by_number(struct dp_netdev *, uint16_t port_no, | |
130 | struct dp_netdev_port **portp); | |
131 | static int get_port_by_name(struct dp_netdev *, const char *devname, | |
132 | struct dp_netdev_port **portp); | |
133 | static void dp_netdev_free(struct dp_netdev *); | |
134 | static void dp_netdev_flow_flush(struct dp_netdev *); | |
c3827f61 BP |
135 | static int do_add_port(struct dp_netdev *, const char *devname, |
136 | const char *type, uint16_t port_no); | |
72865317 | 137 | static int do_del_port(struct dp_netdev *, uint16_t port_no); |
614c4892 BP |
138 | static int dpif_netdev_open(const struct dpif_class *, const char *name, |
139 | bool create, struct dpif **); | |
72865317 | 140 | static int dp_netdev_output_control(struct dp_netdev *, const struct ofpbuf *, |
b9298d3f | 141 | int queue_no, int port_no, uint64_t arg); |
72865317 | 142 | static int dp_netdev_execute_actions(struct dp_netdev *, |
14608a15 | 143 | struct ofpbuf *, struct flow *, |
cdee00fd | 144 | const struct nlattr *actions, |
cf22f8cb | 145 | size_t actions_len); |
72865317 | 146 | |
614c4892 BP |
147 | static struct dpif_class dpif_dummy_class; |
148 | ||
72865317 BP |
149 | static struct dpif_netdev * |
150 | dpif_netdev_cast(const struct dpif *dpif) | |
151 | { | |
614c4892 | 152 | assert(dpif->dpif_class->open == dpif_netdev_open); |
72865317 BP |
153 | return CONTAINER_OF(dpif, struct dpif_netdev, dpif); |
154 | } | |
155 | ||
156 | static struct dp_netdev * | |
157 | get_dp_netdev(const struct dpif *dpif) | |
158 | { | |
159 | return dpif_netdev_cast(dpif)->dp; | |
160 | } | |
161 | ||
72865317 BP |
162 | static struct dpif * |
163 | create_dpif_netdev(struct dp_netdev *dp) | |
164 | { | |
462278db | 165 | uint16_t netflow_id = hash_string(dp->name, 0); |
72865317 | 166 | struct dpif_netdev *dpif; |
72865317 BP |
167 | |
168 | dp->open_cnt++; | |
169 | ||
72865317 | 170 | dpif = xmalloc(sizeof *dpif); |
614c4892 | 171 | dpif_init(&dpif->dpif, dp->class, dp->name, netflow_id >> 8, netflow_id); |
72865317 BP |
172 | dpif->dp = dp; |
173 | dpif->listen_mask = 0; | |
174 | dpif->dp_serial = dp->serial; | |
72865317 BP |
175 | |
176 | return &dpif->dpif; | |
177 | } | |
178 | ||
179 | static int | |
614c4892 BP |
180 | create_dp_netdev(const char *name, const struct dpif_class *class, |
181 | struct dp_netdev **dpp) | |
72865317 BP |
182 | { |
183 | struct dp_netdev *dp; | |
184 | int error; | |
185 | int i; | |
186 | ||
462278db | 187 | dp = xzalloc(sizeof *dp); |
614c4892 | 188 | dp->class = class; |
462278db | 189 | dp->name = xstrdup(name); |
72865317 BP |
190 | dp->open_cnt = 0; |
191 | dp->drop_frags = false; | |
192 | for (i = 0; i < N_QUEUES; i++) { | |
b3907fbc | 193 | list_init(&dp->queues[i]); |
72865317 BP |
194 | } |
195 | hmap_init(&dp->flow_table); | |
72865317 | 196 | list_init(&dp->port_list); |
c3827f61 | 197 | error = do_add_port(dp, name, "internal", ODPP_LOCAL); |
72865317 BP |
198 | if (error) { |
199 | dp_netdev_free(dp); | |
462278db | 200 | return error; |
72865317 BP |
201 | } |
202 | ||
462278db BP |
203 | shash_add(&dp_netdevs, name, dp); |
204 | ||
205 | *dpp = dp; | |
72865317 BP |
206 | return 0; |
207 | } | |
208 | ||
209 | static int | |
614c4892 | 210 | dpif_netdev_open(const struct dpif_class *class, const char *name, |
4a387741 | 211 | bool create, struct dpif **dpifp) |
72865317 | 212 | { |
462278db BP |
213 | struct dp_netdev *dp; |
214 | ||
215 | dp = shash_find_data(&dp_netdevs, name); | |
216 | if (!dp) { | |
217 | if (!create) { | |
218 | return ENODEV; | |
72865317 | 219 | } else { |
614c4892 | 220 | int error = create_dp_netdev(name, class, &dp); |
462278db BP |
221 | if (error) { |
222 | return error; | |
72865317 | 223 | } |
462278db | 224 | assert(dp != NULL); |
72865317 BP |
225 | } |
226 | } else { | |
614c4892 BP |
227 | if (dp->class != class) { |
228 | return EINVAL; | |
229 | } else if (create) { | |
462278db | 230 | return EEXIST; |
72865317 BP |
231 | } |
232 | } | |
462278db BP |
233 | |
234 | *dpifp = create_dpif_netdev(dp); | |
235 | return 0; | |
72865317 BP |
236 | } |
237 | ||
238 | static void | |
239 | dp_netdev_free(struct dp_netdev *dp) | |
240 | { | |
241 | int i; | |
242 | ||
243 | dp_netdev_flow_flush(dp); | |
244 | while (dp->n_ports > 0) { | |
245 | struct dp_netdev_port *port = CONTAINER_OF( | |
246 | dp->port_list.next, struct dp_netdev_port, node); | |
247 | do_del_port(dp, port->port_no); | |
248 | } | |
249 | for (i = 0; i < N_QUEUES; i++) { | |
b3907fbc | 250 | ofpbuf_list_delete(&dp->queues[i]); |
72865317 BP |
251 | } |
252 | hmap_destroy(&dp->flow_table); | |
462278db | 253 | free(dp->name); |
72865317 BP |
254 | free(dp); |
255 | } | |
256 | ||
257 | static void | |
258 | dpif_netdev_close(struct dpif *dpif) | |
259 | { | |
260 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
261 | assert(dp->open_cnt > 0); | |
7dab847a | 262 | if (--dp->open_cnt == 0 && dp->destroyed) { |
462278db | 263 | shash_find_and_delete(&dp_netdevs, dp->name); |
72865317 BP |
264 | dp_netdev_free(dp); |
265 | } | |
266 | free(dpif); | |
267 | } | |
268 | ||
269 | static int | |
7dab847a | 270 | dpif_netdev_destroy(struct dpif *dpif) |
72865317 BP |
271 | { |
272 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
7dab847a | 273 | dp->destroyed = true; |
72865317 BP |
274 | return 0; |
275 | } | |
276 | ||
277 | static int | |
278 | dpif_netdev_get_stats(const struct dpif *dpif, struct odp_stats *stats) | |
279 | { | |
280 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
281 | memset(stats, 0, sizeof *stats); | |
282 | stats->n_flows = hmap_count(&dp->flow_table); | |
283 | stats->cur_capacity = hmap_capacity(&dp->flow_table); | |
284 | stats->max_capacity = MAX_FLOWS; | |
285 | stats->n_ports = dp->n_ports; | |
286 | stats->max_ports = MAX_PORTS; | |
72865317 BP |
287 | stats->n_frags = dp->n_frags; |
288 | stats->n_hit = dp->n_hit; | |
289 | stats->n_missed = dp->n_missed; | |
290 | stats->n_lost = dp->n_lost; | |
291 | stats->max_miss_queue = MAX_QUEUE_LEN; | |
292 | stats->max_action_queue = MAX_QUEUE_LEN; | |
293 | return 0; | |
294 | } | |
295 | ||
296 | static int | |
297 | dpif_netdev_get_drop_frags(const struct dpif *dpif, bool *drop_fragsp) | |
298 | { | |
299 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
300 | *drop_fragsp = dp->drop_frags; | |
301 | return 0; | |
302 | } | |
303 | ||
304 | static int | |
305 | dpif_netdev_set_drop_frags(struct dpif *dpif, bool drop_frags) | |
306 | { | |
307 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
308 | dp->drop_frags = drop_frags; | |
309 | return 0; | |
310 | } | |
311 | ||
312 | static int | |
c3827f61 | 313 | do_add_port(struct dp_netdev *dp, const char *devname, const char *type, |
72865317 BP |
314 | uint16_t port_no) |
315 | { | |
72865317 | 316 | struct dp_netdev_port *port; |
149f577a | 317 | struct netdev_options netdev_options; |
72865317 | 318 | struct netdev *netdev; |
c3827f61 | 319 | bool internal; |
72865317 BP |
320 | int mtu; |
321 | int error; | |
322 | ||
323 | /* XXX reject devices already in some dp_netdev. */ | |
c3827f61 BP |
324 | if (type[0] == '\0' || !strcmp(type, "system")) { |
325 | internal = false; | |
326 | } else if (!strcmp(type, "internal")) { | |
327 | internal = true; | |
328 | } else { | |
329 | VLOG_WARN("%s: unsupported port type %s", devname, type); | |
330 | return EINVAL; | |
331 | } | |
72865317 BP |
332 | |
333 | /* Open and validate network device. */ | |
149f577a JG |
334 | memset(&netdev_options, 0, sizeof netdev_options); |
335 | netdev_options.name = devname; | |
336 | netdev_options.ethertype = NETDEV_ETH_TYPE_ANY; | |
614c4892 BP |
337 | if (dp->class == &dpif_dummy_class) { |
338 | netdev_options.type = "dummy"; | |
339 | } else if (internal) { | |
149f577a | 340 | netdev_options.type = "tap"; |
72865317 | 341 | } |
149f577a JG |
342 | |
343 | error = netdev_open(&netdev_options, &netdev); | |
72865317 BP |
344 | if (error) { |
345 | return error; | |
346 | } | |
347 | /* XXX reject loopback devices */ | |
348 | /* XXX reject non-Ethernet devices */ | |
349 | ||
350 | error = netdev_turn_flags_on(netdev, NETDEV_PROMISC, false); | |
351 | if (error) { | |
352 | netdev_close(netdev); | |
353 | return error; | |
354 | } | |
355 | ||
356 | port = xmalloc(sizeof *port); | |
357 | port->port_no = port_no; | |
358 | port->netdev = netdev; | |
359 | port->internal = internal; | |
360 | ||
3d222126 | 361 | netdev_get_mtu(netdev, &mtu); |
72865317 BP |
362 | if (mtu > max_mtu) { |
363 | max_mtu = mtu; | |
364 | } | |
365 | ||
366 | list_push_back(&dp->port_list, &port->node); | |
367 | dp->ports[port_no] = port; | |
368 | dp->n_ports++; | |
369 | dp->serial++; | |
370 | ||
371 | return 0; | |
372 | } | |
373 | ||
374 | static int | |
c3827f61 | 375 | dpif_netdev_port_add(struct dpif *dpif, struct netdev *netdev, |
72865317 BP |
376 | uint16_t *port_nop) |
377 | { | |
378 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
379 | int port_no; | |
380 | ||
381 | for (port_no = 0; port_no < MAX_PORTS; port_no++) { | |
382 | if (!dp->ports[port_no]) { | |
383 | *port_nop = port_no; | |
c3827f61 BP |
384 | return do_add_port(dp, netdev_get_name(netdev), |
385 | netdev_get_type(netdev), port_no); | |
72865317 BP |
386 | } |
387 | } | |
3c71830a | 388 | return EFBIG; |
72865317 BP |
389 | } |
390 | ||
391 | static int | |
392 | dpif_netdev_port_del(struct dpif *dpif, uint16_t port_no) | |
393 | { | |
394 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
395 | return port_no == ODPP_LOCAL ? EINVAL : do_del_port(dp, port_no); | |
396 | } | |
397 | ||
398 | static bool | |
399 | is_valid_port_number(uint16_t port_no) | |
400 | { | |
401 | return port_no < MAX_PORTS; | |
402 | } | |
403 | ||
404 | static int | |
405 | get_port_by_number(struct dp_netdev *dp, | |
406 | uint16_t port_no, struct dp_netdev_port **portp) | |
407 | { | |
408 | if (!is_valid_port_number(port_no)) { | |
409 | *portp = NULL; | |
410 | return EINVAL; | |
411 | } else { | |
412 | *portp = dp->ports[port_no]; | |
413 | return *portp ? 0 : ENOENT; | |
414 | } | |
415 | } | |
416 | ||
417 | static int | |
418 | get_port_by_name(struct dp_netdev *dp, | |
419 | const char *devname, struct dp_netdev_port **portp) | |
420 | { | |
421 | struct dp_netdev_port *port; | |
422 | ||
4e8e4213 | 423 | LIST_FOR_EACH (port, node, &dp->port_list) { |
72865317 BP |
424 | if (!strcmp(netdev_get_name(port->netdev), devname)) { |
425 | *portp = port; | |
426 | return 0; | |
427 | } | |
428 | } | |
429 | return ENOENT; | |
430 | } | |
431 | ||
432 | static int | |
433 | do_del_port(struct dp_netdev *dp, uint16_t port_no) | |
434 | { | |
435 | struct dp_netdev_port *port; | |
6c88d577 | 436 | char *name; |
72865317 BP |
437 | int error; |
438 | ||
439 | error = get_port_by_number(dp, port_no, &port); | |
440 | if (error) { | |
441 | return error; | |
442 | } | |
443 | ||
444 | list_remove(&port->node); | |
445 | dp->ports[port->port_no] = NULL; | |
446 | dp->n_ports--; | |
447 | dp->serial++; | |
448 | ||
6c88d577 | 449 | name = xstrdup(netdev_get_name(port->netdev)); |
72865317 | 450 | netdev_close(port->netdev); |
149f577a | 451 | |
6c88d577 | 452 | free(name); |
72865317 BP |
453 | free(port); |
454 | ||
455 | return 0; | |
456 | } | |
457 | ||
458 | static void | |
459 | answer_port_query(const struct dp_netdev_port *port, struct odp_port *odp_port) | |
460 | { | |
461 | memset(odp_port, 0, sizeof *odp_port); | |
462 | ovs_strlcpy(odp_port->devname, netdev_get_name(port->netdev), | |
463 | sizeof odp_port->devname); | |
464 | odp_port->port = port->port_no; | |
c3827f61 | 465 | strcpy(odp_port->type, port->internal ? "internal" : "system"); |
72865317 BP |
466 | } |
467 | ||
468 | static int | |
469 | dpif_netdev_port_query_by_number(const struct dpif *dpif, uint16_t port_no, | |
470 | struct odp_port *odp_port) | |
471 | { | |
472 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
473 | struct dp_netdev_port *port; | |
474 | int error; | |
475 | ||
476 | error = get_port_by_number(dp, port_no, &port); | |
477 | if (!error) { | |
478 | answer_port_query(port, odp_port); | |
479 | } | |
480 | return error; | |
481 | } | |
482 | ||
483 | static int | |
484 | dpif_netdev_port_query_by_name(const struct dpif *dpif, const char *devname, | |
485 | struct odp_port *odp_port) | |
486 | { | |
487 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
488 | struct dp_netdev_port *port; | |
489 | int error; | |
490 | ||
491 | error = get_port_by_name(dp, devname, &port); | |
492 | if (!error) { | |
493 | answer_port_query(port, odp_port); | |
494 | } | |
495 | return error; | |
496 | } | |
497 | ||
498 | static void | |
499 | dp_netdev_free_flow(struct dp_netdev *dp, struct dp_netdev_flow *flow) | |
500 | { | |
501 | hmap_remove(&dp->flow_table, &flow->node); | |
502 | free(flow->actions); | |
503 | free(flow); | |
504 | } | |
505 | ||
506 | static void | |
507 | dp_netdev_flow_flush(struct dp_netdev *dp) | |
508 | { | |
509 | struct dp_netdev_flow *flow, *next; | |
510 | ||
4e8e4213 | 511 | HMAP_FOR_EACH_SAFE (flow, next, node, &dp->flow_table) { |
72865317 BP |
512 | dp_netdev_free_flow(dp, flow); |
513 | } | |
514 | } | |
515 | ||
516 | static int | |
517 | dpif_netdev_flow_flush(struct dpif *dpif) | |
518 | { | |
519 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
520 | dp_netdev_flow_flush(dp); | |
521 | return 0; | |
522 | } | |
523 | ||
524 | static int | |
525 | dpif_netdev_port_list(const struct dpif *dpif, struct odp_port *ports, int n) | |
526 | { | |
527 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
528 | struct dp_netdev_port *port; | |
529 | int i; | |
530 | ||
531 | i = 0; | |
4e8e4213 | 532 | LIST_FOR_EACH (port, node, &dp->port_list) { |
72865317 BP |
533 | struct odp_port *odp_port = &ports[i]; |
534 | if (i >= n) { | |
535 | break; | |
536 | } | |
537 | answer_port_query(port, odp_port); | |
538 | i++; | |
539 | } | |
540 | return dp->n_ports; | |
541 | } | |
542 | ||
543 | static int | |
67a4917b | 544 | dpif_netdev_port_poll(const struct dpif *dpif_, char **devnamep OVS_UNUSED) |
72865317 BP |
545 | { |
546 | struct dpif_netdev *dpif = dpif_netdev_cast(dpif_); | |
547 | if (dpif->dp_serial != dpif->dp->serial) { | |
548 | dpif->dp_serial = dpif->dp->serial; | |
549 | return ENOBUFS; | |
550 | } else { | |
551 | return EAGAIN; | |
552 | } | |
553 | } | |
554 | ||
555 | static void | |
556 | dpif_netdev_port_poll_wait(const struct dpif *dpif_) | |
557 | { | |
558 | struct dpif_netdev *dpif = dpif_netdev_cast(dpif_); | |
559 | if (dpif->dp_serial != dpif->dp->serial) { | |
560 | poll_immediate_wake(); | |
561 | } | |
562 | } | |
563 | ||
72865317 | 564 | static struct dp_netdev_flow * |
14608a15 | 565 | dp_netdev_lookup_flow(const struct dp_netdev *dp, const struct flow *key) |
72865317 BP |
566 | { |
567 | struct dp_netdev_flow *flow; | |
568 | ||
4e8e4213 | 569 | HMAP_FOR_EACH_WITH_HASH (flow, node, flow_hash(key, 0), &dp->flow_table) { |
72865317 BP |
570 | if (flow_equal(&flow->key, key)) { |
571 | return flow; | |
572 | } | |
573 | } | |
574 | return NULL; | |
575 | } | |
576 | ||
14608a15 | 577 | /* The caller must fill in odp_flow->key itself. */ |
72865317 | 578 | static void |
fde05ade | 579 | answer_flow_query(struct dp_netdev_flow *flow, uint32_t query_flags, |
72865317 BP |
580 | struct odp_flow *odp_flow) |
581 | { | |
582 | if (flow) { | |
72865317 BP |
583 | odp_flow->stats.n_packets = flow->packet_count; |
584 | odp_flow->stats.n_bytes = flow->byte_count; | |
585 | odp_flow->stats.used_sec = flow->used.tv_sec; | |
c73814a3 | 586 | odp_flow->stats.used_nsec = flow->used.tv_nsec; |
72865317 | 587 | odp_flow->stats.tcp_flags = TCP_FLAGS(flow->tcp_ctl); |
abfec865 | 588 | odp_flow->stats.reserved = 0; |
72865317 | 589 | odp_flow->stats.error = 0; |
cdee00fd | 590 | if (odp_flow->actions_len > 0) { |
72865317 | 591 | memcpy(odp_flow->actions, flow->actions, |
cdee00fd BP |
592 | MIN(odp_flow->actions_len, flow->actions_len)); |
593 | odp_flow->actions_len = flow->actions_len; | |
72865317 | 594 | } |
fde05ade JG |
595 | |
596 | if (query_flags & ODPFF_ZERO_TCP_FLAGS) { | |
597 | flow->tcp_ctl = 0; | |
598 | } | |
599 | ||
72865317 BP |
600 | } else { |
601 | odp_flow->stats.error = ENOENT; | |
602 | } | |
603 | } | |
604 | ||
605 | static int | |
606 | dpif_netdev_flow_get(const struct dpif *dpif, struct odp_flow flows[], int n) | |
607 | { | |
608 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
609 | int i; | |
610 | ||
611 | for (i = 0; i < n; i++) { | |
612 | struct odp_flow *odp_flow = &flows[i]; | |
14608a15 BP |
613 | struct flow key; |
614 | ||
615 | odp_flow_key_to_flow(&odp_flow->key, &key); | |
616 | answer_flow_query(dp_netdev_lookup_flow(dp, &key), | |
fde05ade | 617 | odp_flow->flags, odp_flow); |
72865317 BP |
618 | } |
619 | return 0; | |
620 | } | |
621 | ||
622 | static int | |
cdee00fd | 623 | dpif_netdev_validate_actions(const struct nlattr *actions, |
cf22f8cb | 624 | size_t actions_len, bool *mutates) |
72865317 | 625 | { |
cdee00fd BP |
626 | const struct nlattr *a; |
627 | unsigned int left; | |
72865317 BP |
628 | |
629 | *mutates = false; | |
cdee00fd BP |
630 | NL_ATTR_FOR_EACH (a, left, actions, actions_len) { |
631 | uint16_t type = nl_attr_type(a); | |
632 | int len = odp_action_len(type); | |
633 | ||
634 | if (len != nl_attr_get_size(a)) { | |
635 | return EINVAL; | |
636 | } | |
637 | ||
638 | switch (type) { | |
3c5f6de3 | 639 | case ODPAT_OUTPUT: |
cdee00fd | 640 | if (nl_attr_get_u32(a) >= MAX_PORTS) { |
3c5f6de3 | 641 | return EINVAL; |
72865317 | 642 | } |
3c5f6de3 | 643 | break; |
72865317 | 644 | |
72865317 | 645 | case ODPAT_CONTROLLER: |
cdee00fd | 646 | case ODPAT_DROP_SPOOFED_ARP: |
72865317 BP |
647 | break; |
648 | ||
26233bb4 | 649 | case ODPAT_SET_DL_TCI: |
72865317 | 650 | *mutates = true; |
cdee00fd | 651 | if (nl_attr_get_be16(a) & htons(VLAN_CFI)) { |
3c5f6de3 | 652 | return EINVAL; |
72865317 | 653 | } |
3c5f6de3 JG |
654 | break; |
655 | ||
656 | case ODPAT_SET_NW_TOS: | |
657 | *mutates = true; | |
cdee00fd | 658 | if (nl_attr_get_u8(a) & IP_ECN_MASK) { |
3c5f6de3 JG |
659 | return EINVAL; |
660 | } | |
661 | break; | |
72865317 BP |
662 | |
663 | case ODPAT_STRIP_VLAN: | |
664 | case ODPAT_SET_DL_SRC: | |
665 | case ODPAT_SET_DL_DST: | |
666 | case ODPAT_SET_NW_SRC: | |
667 | case ODPAT_SET_NW_DST: | |
668 | case ODPAT_SET_TP_SRC: | |
669 | case ODPAT_SET_TP_DST: | |
670 | *mutates = true; | |
671 | break; | |
672 | ||
cdee00fd BP |
673 | case ODPAT_SET_TUNNEL: |
674 | case ODPAT_SET_PRIORITY: | |
675 | case ODPAT_POP_PRIORITY: | |
3c5f6de3 | 676 | default: |
72865317 | 677 | return EOPNOTSUPP; |
3c5f6de3 JG |
678 | } |
679 | } | |
680 | return 0; | |
72865317 BP |
681 | } |
682 | ||
683 | static int | |
684 | set_flow_actions(struct dp_netdev_flow *flow, struct odp_flow *odp_flow) | |
685 | { | |
72865317 BP |
686 | bool mutates; |
687 | int error; | |
688 | ||
72865317 | 689 | error = dpif_netdev_validate_actions(odp_flow->actions, |
cdee00fd | 690 | odp_flow->actions_len, &mutates); |
72865317 BP |
691 | if (error) { |
692 | return error; | |
693 | } | |
694 | ||
cdee00fd BP |
695 | flow->actions = xrealloc(flow->actions, odp_flow->actions_len); |
696 | flow->actions_len = odp_flow->actions_len; | |
697 | memcpy(flow->actions, odp_flow->actions, odp_flow->actions_len); | |
72865317 BP |
698 | return 0; |
699 | } | |
700 | ||
701 | static int | |
702 | add_flow(struct dpif *dpif, struct odp_flow *odp_flow) | |
703 | { | |
704 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
705 | struct dp_netdev_flow *flow; | |
706 | int error; | |
707 | ||
ec6fde61 | 708 | flow = xzalloc(sizeof *flow); |
14608a15 | 709 | odp_flow_key_to_flow(&odp_flow->key, &flow->key); |
72865317 BP |
710 | |
711 | error = set_flow_actions(flow, odp_flow); | |
712 | if (error) { | |
713 | free(flow); | |
714 | return error; | |
715 | } | |
716 | ||
717 | hmap_insert(&dp->flow_table, &flow->node, flow_hash(&flow->key, 0)); | |
718 | return 0; | |
719 | } | |
720 | ||
721 | static void | |
722 | clear_stats(struct dp_netdev_flow *flow) | |
723 | { | |
724 | flow->used.tv_sec = 0; | |
c73814a3 | 725 | flow->used.tv_nsec = 0; |
72865317 BP |
726 | flow->packet_count = 0; |
727 | flow->byte_count = 0; | |
72865317 BP |
728 | flow->tcp_ctl = 0; |
729 | } | |
730 | ||
731 | static int | |
732 | dpif_netdev_flow_put(struct dpif *dpif, struct odp_flow_put *put) | |
733 | { | |
734 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
735 | struct dp_netdev_flow *flow; | |
14608a15 | 736 | struct flow key; |
72865317 | 737 | |
14608a15 BP |
738 | odp_flow_key_to_flow(&put->flow.key, &key); |
739 | flow = dp_netdev_lookup_flow(dp, &key); | |
72865317 BP |
740 | if (!flow) { |
741 | if (put->flags & ODPPF_CREATE) { | |
742 | if (hmap_count(&dp->flow_table) < MAX_FLOWS) { | |
743 | return add_flow(dpif, &put->flow); | |
744 | } else { | |
3c71830a | 745 | return EFBIG; |
72865317 BP |
746 | } |
747 | } else { | |
748 | return ENOENT; | |
749 | } | |
750 | } else { | |
751 | if (put->flags & ODPPF_MODIFY) { | |
752 | int error = set_flow_actions(flow, &put->flow); | |
753 | if (!error && put->flags & ODPPF_ZERO_STATS) { | |
754 | clear_stats(flow); | |
755 | } | |
756 | return error; | |
757 | } else { | |
758 | return EEXIST; | |
759 | } | |
760 | } | |
761 | } | |
762 | ||
763 | ||
764 | static int | |
765 | dpif_netdev_flow_del(struct dpif *dpif, struct odp_flow *odp_flow) | |
766 | { | |
767 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
768 | struct dp_netdev_flow *flow; | |
14608a15 | 769 | struct flow key; |
72865317 | 770 | |
14608a15 BP |
771 | odp_flow_key_to_flow(&odp_flow->key, &key); |
772 | flow = dp_netdev_lookup_flow(dp, &key); | |
72865317 | 773 | if (flow) { |
fde05ade | 774 | answer_flow_query(flow, 0, odp_flow); |
72865317 BP |
775 | dp_netdev_free_flow(dp, flow); |
776 | return 0; | |
777 | } else { | |
778 | return ENOENT; | |
779 | } | |
780 | } | |
781 | ||
782 | static int | |
783 | dpif_netdev_flow_list(const struct dpif *dpif, struct odp_flow flows[], int n) | |
784 | { | |
785 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
786 | struct dp_netdev_flow *flow; | |
787 | int i; | |
788 | ||
789 | i = 0; | |
4e8e4213 | 790 | HMAP_FOR_EACH (flow, node, &dp->flow_table) { |
72865317 BP |
791 | if (i >= n) { |
792 | break; | |
793 | } | |
14608a15 BP |
794 | |
795 | odp_flow_key_from_flow(&flows[i].key, &flow->key); | |
796 | answer_flow_query(flow, 0, &flows[i]); | |
797 | i++; | |
72865317 BP |
798 | } |
799 | return hmap_count(&dp->flow_table); | |
800 | } | |
801 | ||
802 | static int | |
f1588b1f | 803 | dpif_netdev_execute(struct dpif *dpif, |
cf22f8cb | 804 | const struct nlattr *actions, size_t actions_len, |
72865317 BP |
805 | const struct ofpbuf *packet) |
806 | { | |
807 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
808 | struct ofpbuf copy; | |
809 | bool mutates; | |
ae412e7d | 810 | struct flow key; |
72865317 BP |
811 | int error; |
812 | ||
3c71830a | 813 | if (packet->size < ETH_HEADER_LEN || packet->size > UINT16_MAX) { |
72865317 BP |
814 | return EINVAL; |
815 | } | |
816 | ||
cdee00fd | 817 | error = dpif_netdev_validate_actions(actions, actions_len, &mutates); |
72865317 BP |
818 | if (error) { |
819 | return error; | |
820 | } | |
821 | ||
822 | if (mutates) { | |
823 | /* We need a deep copy of 'packet' since we're going to modify its | |
824 | * data. */ | |
825 | ofpbuf_init(©, DP_NETDEV_HEADROOM + packet->size); | |
4b87bea6 | 826 | ofpbuf_reserve(©, DP_NETDEV_HEADROOM); |
72865317 BP |
827 | ofpbuf_put(©, packet->data, packet->size); |
828 | } else { | |
829 | /* We still need a shallow copy of 'packet', even though we won't | |
830 | * modify its data, because flow_extract() modifies packet->l2, etc. | |
831 | * We could probably get away with modifying those but it's more polite | |
832 | * if we don't. */ | |
833 | copy = *packet; | |
834 | } | |
14608a15 | 835 | flow_extract(©, 0, -1, &key); |
cdee00fd | 836 | error = dp_netdev_execute_actions(dp, ©, &key, actions, actions_len); |
72865317 BP |
837 | if (mutates) { |
838 | ofpbuf_uninit(©); | |
839 | } | |
840 | return error; | |
841 | } | |
842 | ||
843 | static int | |
844 | dpif_netdev_recv_get_mask(const struct dpif *dpif, int *listen_mask) | |
845 | { | |
846 | struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif); | |
847 | *listen_mask = dpif_netdev->listen_mask; | |
848 | return 0; | |
849 | } | |
850 | ||
851 | static int | |
852 | dpif_netdev_recv_set_mask(struct dpif *dpif, int listen_mask) | |
853 | { | |
854 | struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif); | |
855 | if (!(listen_mask & ~ODPL_ALL)) { | |
856 | dpif_netdev->listen_mask = listen_mask; | |
857 | return 0; | |
858 | } else { | |
859 | return EINVAL; | |
860 | } | |
861 | } | |
862 | ||
b3907fbc | 863 | static int |
72865317 BP |
864 | find_nonempty_queue(struct dpif *dpif) |
865 | { | |
866 | struct dpif_netdev *dpif_netdev = dpif_netdev_cast(dpif); | |
867 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
868 | int mask = dpif_netdev->listen_mask; | |
869 | int i; | |
870 | ||
871 | for (i = 0; i < N_QUEUES; i++) { | |
b3907fbc BP |
872 | struct list *queue = &dp->queues[i]; |
873 | if (!list_is_empty(queue) && mask & (1u << i)) { | |
874 | return i; | |
72865317 BP |
875 | } |
876 | } | |
b3907fbc | 877 | return -1; |
72865317 BP |
878 | } |
879 | ||
880 | static int | |
881 | dpif_netdev_recv(struct dpif *dpif, struct ofpbuf **bufp) | |
882 | { | |
b3907fbc BP |
883 | int queue_idx = find_nonempty_queue(dpif); |
884 | if (queue_idx >= 0) { | |
885 | struct dp_netdev *dp = get_dp_netdev(dpif); | |
886 | ||
887 | *bufp = ofpbuf_from_list(list_pop_front(&dp->queues[queue_idx])); | |
888 | dp->queue_len[queue_idx]--; | |
889 | ||
72865317 BP |
890 | return 0; |
891 | } else { | |
892 | return EAGAIN; | |
893 | } | |
894 | } | |
895 | ||
896 | static void | |
897 | dpif_netdev_recv_wait(struct dpif *dpif) | |
898 | { | |
b3907fbc | 899 | if (find_nonempty_queue(dpif) >= 0) { |
72865317 BP |
900 | poll_immediate_wake(); |
901 | } else { | |
902 | /* No messages ready to be received, and dp_wait() will ensure that we | |
903 | * wake up to queue new messages, so there is nothing to do. */ | |
904 | } | |
905 | } | |
906 | \f | |
907 | static void | |
14608a15 | 908 | dp_netdev_flow_used(struct dp_netdev_flow *flow, struct flow *key, |
72865317 BP |
909 | const struct ofpbuf *packet) |
910 | { | |
c73814a3 | 911 | time_timespec(&flow->used); |
72865317 BP |
912 | flow->packet_count++; |
913 | flow->byte_count += packet->size; | |
abfec865 BP |
914 | if (key->dl_type == htons(ETH_TYPE_IP) && key->nw_proto == IPPROTO_TCP) { |
915 | struct tcp_header *th = packet->l4; | |
916 | flow->tcp_ctl |= th->tcp_ctl; | |
72865317 BP |
917 | } |
918 | } | |
919 | ||
920 | static void | |
921 | dp_netdev_port_input(struct dp_netdev *dp, struct dp_netdev_port *port, | |
922 | struct ofpbuf *packet) | |
923 | { | |
924 | struct dp_netdev_flow *flow; | |
14608a15 | 925 | struct flow key; |
72865317 | 926 | |
1805876e BP |
927 | if (packet->size < ETH_HEADER_LEN) { |
928 | return; | |
929 | } | |
659586ef | 930 | if (flow_extract(packet, 0, port->port_no, &key) && dp->drop_frags) { |
72865317 BP |
931 | dp->n_frags++; |
932 | return; | |
933 | } | |
934 | ||
935 | flow = dp_netdev_lookup_flow(dp, &key); | |
936 | if (flow) { | |
937 | dp_netdev_flow_used(flow, &key, packet); | |
938 | dp_netdev_execute_actions(dp, packet, &key, | |
cdee00fd | 939 | flow->actions, flow->actions_len); |
72865317 BP |
940 | dp->n_hit++; |
941 | } else { | |
942 | dp->n_missed++; | |
943 | dp_netdev_output_control(dp, packet, _ODPL_MISS_NR, port->port_no, 0); | |
944 | } | |
945 | } | |
946 | ||
947 | static void | |
948 | dp_netdev_run(void) | |
949 | { | |
462278db | 950 | struct shash_node *node; |
72865317 | 951 | struct ofpbuf packet; |
72865317 BP |
952 | |
953 | ofpbuf_init(&packet, DP_NETDEV_HEADROOM + max_mtu); | |
462278db BP |
954 | SHASH_FOR_EACH (node, &dp_netdevs) { |
955 | struct dp_netdev *dp = node->data; | |
72865317 BP |
956 | struct dp_netdev_port *port; |
957 | ||
4e8e4213 | 958 | LIST_FOR_EACH (port, node, &dp->port_list) { |
72865317 BP |
959 | int error; |
960 | ||
961 | /* Reset packet contents. */ | |
4b87bea6 BP |
962 | ofpbuf_clear(&packet); |
963 | ofpbuf_reserve(&packet, DP_NETDEV_HEADROOM); | |
72865317 BP |
964 | |
965 | error = netdev_recv(port->netdev, &packet); | |
966 | if (!error) { | |
967 | dp_netdev_port_input(dp, port, &packet); | |
7fa710e4 | 968 | } else if (error != EAGAIN && error != EOPNOTSUPP) { |
72865317 BP |
969 | struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); |
970 | VLOG_ERR_RL(&rl, "error receiving data from %s: %s", | |
971 | netdev_get_name(port->netdev), strerror(error)); | |
972 | } | |
973 | } | |
974 | } | |
975 | ofpbuf_uninit(&packet); | |
976 | } | |
977 | ||
978 | static void | |
979 | dp_netdev_wait(void) | |
980 | { | |
462278db | 981 | struct shash_node *node; |
72865317 | 982 | |
462278db BP |
983 | SHASH_FOR_EACH (node, &dp_netdevs) { |
984 | struct dp_netdev *dp = node->data; | |
72865317 | 985 | struct dp_netdev_port *port; |
462278db | 986 | |
4e8e4213 | 987 | LIST_FOR_EACH (port, node, &dp->port_list) { |
72865317 BP |
988 | netdev_recv_wait(port->netdev); |
989 | } | |
990 | } | |
991 | } | |
992 | ||
2a910c50 | 993 | |
27bcf966 BP |
994 | /* Modify the TCI field of 'packet'. If a VLAN tag is present, its TCI field |
995 | * is replaced by 'tci'. If a VLAN tag is not present, one is added with the | |
996 | * TCI field set to 'tci'. | |
2a910c50 | 997 | */ |
72865317 | 998 | static void |
27bcf966 | 999 | dp_netdev_set_dl_tci(struct ofpbuf *packet, uint16_t tci) |
72865317 BP |
1000 | { |
1001 | struct vlan_eth_header *veh; | |
142181fc | 1002 | struct eth_header *eh; |
72865317 | 1003 | |
142181fc BP |
1004 | eh = packet->l2; |
1005 | if (packet->size >= sizeof(struct vlan_eth_header) | |
1006 | && eh->eth_type == htons(ETH_TYPE_VLAN)) { | |
72865317 | 1007 | veh = packet->l2; |
27bcf966 | 1008 | veh->veth_tci = tci; |
72865317 BP |
1009 | } else { |
1010 | /* Insert new 802.1Q header. */ | |
72865317 BP |
1011 | struct vlan_eth_header tmp; |
1012 | memcpy(tmp.veth_dst, eh->eth_dst, ETH_ADDR_LEN); | |
1013 | memcpy(tmp.veth_src, eh->eth_src, ETH_ADDR_LEN); | |
1014 | tmp.veth_type = htons(ETH_TYPE_VLAN); | |
27bcf966 | 1015 | tmp.veth_tci = tci; |
72865317 BP |
1016 | tmp.veth_next_type = eh->eth_type; |
1017 | ||
1018 | veh = ofpbuf_push_uninit(packet, VLAN_HEADER_LEN); | |
1019 | memcpy(veh, &tmp, sizeof tmp); | |
1020 | packet->l2 = (char*)packet->l2 - VLAN_HEADER_LEN; | |
1021 | } | |
72865317 BP |
1022 | } |
1023 | ||
1024 | static void | |
aebdcb93 | 1025 | dp_netdev_strip_vlan(struct ofpbuf *packet) |
72865317 BP |
1026 | { |
1027 | struct vlan_eth_header *veh = packet->l2; | |
1805876e BP |
1028 | if (packet->size >= sizeof *veh |
1029 | && veh->veth_type == htons(ETH_TYPE_VLAN)) { | |
72865317 BP |
1030 | struct eth_header tmp; |
1031 | ||
1032 | memcpy(tmp.eth_dst, veh->veth_dst, ETH_ADDR_LEN); | |
1033 | memcpy(tmp.eth_src, veh->veth_src, ETH_ADDR_LEN); | |
1034 | tmp.eth_type = veh->veth_next_type; | |
1035 | ||
4b87bea6 | 1036 | ofpbuf_pull(packet, VLAN_HEADER_LEN); |
72865317 BP |
1037 | packet->l2 = (char*)packet->l2 + VLAN_HEADER_LEN; |
1038 | memcpy(packet->data, &tmp, sizeof tmp); | |
72865317 BP |
1039 | } |
1040 | } | |
1041 | ||
1042 | static void | |
aebdcb93 | 1043 | dp_netdev_set_dl_src(struct ofpbuf *packet, const uint8_t dl_addr[ETH_ADDR_LEN]) |
72865317 BP |
1044 | { |
1045 | struct eth_header *eh = packet->l2; | |
1046 | memcpy(eh->eth_src, dl_addr, sizeof eh->eth_src); | |
1047 | } | |
1048 | ||
1049 | static void | |
aebdcb93 | 1050 | dp_netdev_set_dl_dst(struct ofpbuf *packet, const uint8_t dl_addr[ETH_ADDR_LEN]) |
72865317 BP |
1051 | { |
1052 | struct eth_header *eh = packet->l2; | |
1053 | memcpy(eh->eth_dst, dl_addr, sizeof eh->eth_dst); | |
1054 | } | |
1055 | ||
ca78c6b6 | 1056 | static bool |
14608a15 | 1057 | is_ip(const struct ofpbuf *packet, const struct flow *key) |
ca78c6b6 BP |
1058 | { |
1059 | return key->dl_type == htons(ETH_TYPE_IP) && packet->l4; | |
1060 | } | |
1061 | ||
72865317 | 1062 | static void |
14608a15 | 1063 | dp_netdev_set_nw_addr(struct ofpbuf *packet, struct flow *key, |
cdee00fd | 1064 | const struct nlattr *a) |
72865317 | 1065 | { |
ca78c6b6 | 1066 | if (is_ip(packet, key)) { |
72865317 | 1067 | struct ip_header *nh = packet->l3; |
cdee00fd BP |
1068 | ovs_be32 ip = nl_attr_get_be32(a); |
1069 | uint16_t type = nl_attr_type(a); | |
72865317 BP |
1070 | uint32_t *field; |
1071 | ||
cdee00fd | 1072 | field = type == ODPAT_SET_NW_SRC ? &nh->ip_src : &nh->ip_dst; |
ca78c6b6 | 1073 | if (key->nw_proto == IP_TYPE_TCP && packet->l7) { |
72865317 | 1074 | struct tcp_header *th = packet->l4; |
cdee00fd | 1075 | th->tcp_csum = recalc_csum32(th->tcp_csum, *field, ip); |
ca78c6b6 | 1076 | } else if (key->nw_proto == IP_TYPE_UDP && packet->l7) { |
72865317 BP |
1077 | struct udp_header *uh = packet->l4; |
1078 | if (uh->udp_csum) { | |
cdee00fd | 1079 | uh->udp_csum = recalc_csum32(uh->udp_csum, *field, ip); |
72865317 BP |
1080 | if (!uh->udp_csum) { |
1081 | uh->udp_csum = 0xffff; | |
1082 | } | |
1083 | } | |
1084 | } | |
cdee00fd BP |
1085 | nh->ip_csum = recalc_csum32(nh->ip_csum, *field, ip); |
1086 | *field = ip; | |
72865317 BP |
1087 | } |
1088 | } | |
1089 | ||
959a2ecd | 1090 | static void |
cdee00fd | 1091 | dp_netdev_set_nw_tos(struct ofpbuf *packet, struct flow *key, uint8_t nw_tos) |
959a2ecd | 1092 | { |
ca78c6b6 | 1093 | if (is_ip(packet, key)) { |
959a2ecd JP |
1094 | struct ip_header *nh = packet->l3; |
1095 | uint8_t *field = &nh->ip_tos; | |
1096 | ||
f1193301 | 1097 | /* Set the DSCP bits and preserve the ECN bits. */ |
cdee00fd | 1098 | uint8_t new = nw_tos | (nh->ip_tos & IP_ECN_MASK); |
959a2ecd JP |
1099 | |
1100 | nh->ip_csum = recalc_csum16(nh->ip_csum, htons((uint16_t)*field), | |
3d785a24 | 1101 | htons((uint16_t) new)); |
959a2ecd JP |
1102 | *field = new; |
1103 | } | |
1104 | } | |
1105 | ||
72865317 | 1106 | static void |
14608a15 | 1107 | dp_netdev_set_tp_port(struct ofpbuf *packet, struct flow *key, |
cdee00fd | 1108 | const struct nlattr *a) |
72865317 | 1109 | { |
ca78c6b6 | 1110 | if (is_ip(packet, key)) { |
cdee00fd BP |
1111 | uint16_t type = nl_attr_type(a); |
1112 | ovs_be16 port = nl_attr_get_be16(a); | |
72865317 | 1113 | uint16_t *field; |
cdee00fd | 1114 | |
ca78c6b6 | 1115 | if (key->nw_proto == IPPROTO_TCP && packet->l7) { |
72865317 | 1116 | struct tcp_header *th = packet->l4; |
cdee00fd BP |
1117 | field = type == ODPAT_SET_TP_SRC ? &th->tcp_src : &th->tcp_dst; |
1118 | th->tcp_csum = recalc_csum16(th->tcp_csum, *field, port); | |
1119 | *field = port; | |
ca78c6b6 | 1120 | } else if (key->nw_proto == IPPROTO_UDP && packet->l7) { |
72865317 | 1121 | struct udp_header *uh = packet->l4; |
cdee00fd BP |
1122 | field = type == ODPAT_SET_TP_SRC ? &uh->udp_src : &uh->udp_dst; |
1123 | uh->udp_csum = recalc_csum16(uh->udp_csum, *field, port); | |
1124 | *field = port; | |
11cdf5e6 JG |
1125 | } else { |
1126 | return; | |
1127 | } | |
72865317 BP |
1128 | } |
1129 | } | |
1130 | ||
1131 | static void | |
1132 | dp_netdev_output_port(struct dp_netdev *dp, struct ofpbuf *packet, | |
1133 | uint16_t out_port) | |
1134 | { | |
2105ccc8 | 1135 | struct dp_netdev_port *p = dp->ports[out_port]; |
72865317 BP |
1136 | if (p) { |
1137 | netdev_send(p->netdev, packet); | |
1138 | } | |
1139 | } | |
1140 | ||
72865317 BP |
1141 | static int |
1142 | dp_netdev_output_control(struct dp_netdev *dp, const struct ofpbuf *packet, | |
b9298d3f | 1143 | int queue_no, int port_no, uint64_t arg) |
72865317 | 1144 | { |
72865317 BP |
1145 | struct odp_msg *header; |
1146 | struct ofpbuf *msg; | |
1147 | size_t msg_size; | |
1148 | ||
b3907fbc | 1149 | if (dp->queue_len[queue_no] >= MAX_QUEUE_LEN) { |
72865317 BP |
1150 | dp->n_lost++; |
1151 | return ENOBUFS; | |
1152 | } | |
1153 | ||
1154 | msg_size = sizeof *header + packet->size; | |
68efcbec | 1155 | msg = ofpbuf_new_with_headroom(msg_size, DPIF_RECV_MSG_PADDING); |
72865317 BP |
1156 | header = ofpbuf_put_uninit(msg, sizeof *header); |
1157 | header->type = queue_no; | |
1158 | header->length = msg_size; | |
1159 | header->port = port_no; | |
1160 | header->arg = arg; | |
1161 | ofpbuf_put(msg, packet->data, packet->size); | |
b3907fbc BP |
1162 | list_push_back(&dp->queues[queue_no], &msg->list_node); |
1163 | dp->queue_len[queue_no]++; | |
72865317 BP |
1164 | |
1165 | return 0; | |
1166 | } | |
1167 | ||
401eeb92 BP |
1168 | /* Returns true if 'packet' is an invalid Ethernet+IPv4 ARP packet: one with |
1169 | * screwy or truncated header fields or one whose inner and outer Ethernet | |
1170 | * address differ. */ | |
1171 | static bool | |
14608a15 | 1172 | dp_netdev_is_spoofed_arp(struct ofpbuf *packet, const struct flow *key) |
401eeb92 BP |
1173 | { |
1174 | struct arp_eth_header *arp; | |
1175 | struct eth_header *eth; | |
1176 | ptrdiff_t l3_size; | |
1177 | ||
1178 | if (key->dl_type != htons(ETH_TYPE_ARP)) { | |
1179 | return false; | |
1180 | } | |
1181 | ||
1182 | l3_size = (char *) ofpbuf_end(packet) - (char *) packet->l3; | |
1183 | if (l3_size < sizeof(struct arp_eth_header)) { | |
1184 | return true; | |
1185 | } | |
1186 | ||
1187 | eth = packet->l2; | |
1188 | arp = packet->l3; | |
1189 | return (arp->ar_hrd != htons(ARP_HRD_ETHERNET) | |
1190 | || arp->ar_pro != htons(ARP_PRO_IP) | |
1191 | || arp->ar_hln != ETH_HEADER_LEN | |
1192 | || arp->ar_pln != 4 | |
1193 | || !eth_addr_equals(arp->ar_sha, eth->eth_src)); | |
1194 | } | |
1195 | ||
72865317 BP |
1196 | static int |
1197 | dp_netdev_execute_actions(struct dp_netdev *dp, | |
14608a15 | 1198 | struct ofpbuf *packet, struct flow *key, |
cdee00fd | 1199 | const struct nlattr *actions, |
cf22f8cb | 1200 | size_t actions_len) |
72865317 | 1201 | { |
cdee00fd BP |
1202 | const struct nlattr *a; |
1203 | unsigned int left; | |
72865317 | 1204 | |
cdee00fd BP |
1205 | NL_ATTR_FOR_EACH_UNSAFE (a, left, actions, actions_len) { |
1206 | switch (nl_attr_type(a)) { | |
2105ccc8 | 1207 | case ODPAT_OUTPUT: |
cdee00fd | 1208 | dp_netdev_output_port(dp, packet, nl_attr_get_u32(a)); |
2105ccc8 | 1209 | break; |
72865317 | 1210 | |
2105ccc8 | 1211 | case ODPAT_CONTROLLER: |
72865317 | 1212 | dp_netdev_output_control(dp, packet, _ODPL_ACTION_NR, |
b9298d3f | 1213 | key->in_port, nl_attr_get_u64(a)); |
2105ccc8 | 1214 | break; |
72865317 | 1215 | |
26233bb4 | 1216 | case ODPAT_SET_DL_TCI: |
cdee00fd | 1217 | dp_netdev_set_dl_tci(packet, nl_attr_get_be16(a)); |
72865317 BP |
1218 | break; |
1219 | ||
2105ccc8 BP |
1220 | case ODPAT_STRIP_VLAN: |
1221 | dp_netdev_strip_vlan(packet); | |
1222 | break; | |
72865317 | 1223 | |
2105ccc8 | 1224 | case ODPAT_SET_DL_SRC: |
cdee00fd | 1225 | dp_netdev_set_dl_src(packet, nl_attr_get_unspec(a, ETH_ADDR_LEN)); |
2105ccc8 | 1226 | break; |
72865317 | 1227 | |
2105ccc8 | 1228 | case ODPAT_SET_DL_DST: |
cdee00fd | 1229 | dp_netdev_set_dl_dst(packet, nl_attr_get_unspec(a, ETH_ADDR_LEN)); |
2105ccc8 | 1230 | break; |
72865317 | 1231 | |
2105ccc8 BP |
1232 | case ODPAT_SET_NW_SRC: |
1233 | case ODPAT_SET_NW_DST: | |
cdee00fd | 1234 | dp_netdev_set_nw_addr(packet, key, a); |
2105ccc8 | 1235 | break; |
72865317 | 1236 | |
2105ccc8 | 1237 | case ODPAT_SET_NW_TOS: |
cdee00fd | 1238 | dp_netdev_set_nw_tos(packet, key, nl_attr_get_u8(a)); |
2105ccc8 | 1239 | break; |
959a2ecd | 1240 | |
2105ccc8 BP |
1241 | case ODPAT_SET_TP_SRC: |
1242 | case ODPAT_SET_TP_DST: | |
cdee00fd | 1243 | dp_netdev_set_tp_port(packet, key, a); |
2105ccc8 | 1244 | break; |
401eeb92 BP |
1245 | |
1246 | case ODPAT_DROP_SPOOFED_ARP: | |
1247 | if (dp_netdev_is_spoofed_arp(packet, key)) { | |
1248 | return 0; | |
1249 | } | |
2105ccc8 BP |
1250 | } |
1251 | } | |
72865317 BP |
1252 | return 0; |
1253 | } | |
1254 | ||
1255 | const struct dpif_class dpif_netdev_class = { | |
72865317 BP |
1256 | "netdev", |
1257 | dp_netdev_run, | |
1258 | dp_netdev_wait, | |
d3d22744 | 1259 | NULL, /* enumerate */ |
72865317 BP |
1260 | dpif_netdev_open, |
1261 | dpif_netdev_close, | |
d3d22744 | 1262 | NULL, /* get_all_names */ |
7dab847a | 1263 | dpif_netdev_destroy, |
72865317 BP |
1264 | dpif_netdev_get_stats, |
1265 | dpif_netdev_get_drop_frags, | |
1266 | dpif_netdev_set_drop_frags, | |
1267 | dpif_netdev_port_add, | |
1268 | dpif_netdev_port_del, | |
1269 | dpif_netdev_port_query_by_number, | |
1270 | dpif_netdev_port_query_by_name, | |
1271 | dpif_netdev_port_list, | |
1272 | dpif_netdev_port_poll, | |
1273 | dpif_netdev_port_poll_wait, | |
72865317 BP |
1274 | dpif_netdev_flow_get, |
1275 | dpif_netdev_flow_put, | |
1276 | dpif_netdev_flow_del, | |
1277 | dpif_netdev_flow_flush, | |
1278 | dpif_netdev_flow_list, | |
1279 | dpif_netdev_execute, | |
1280 | dpif_netdev_recv_get_mask, | |
1281 | dpif_netdev_recv_set_mask, | |
72b06300 BP |
1282 | NULL, /* get_sflow_probability */ |
1283 | NULL, /* set_sflow_probability */ | |
aae51f53 | 1284 | NULL, /* queue_to_priority */ |
72865317 BP |
1285 | dpif_netdev_recv, |
1286 | dpif_netdev_recv_wait, | |
1287 | }; | |
614c4892 BP |
1288 | |
1289 | void | |
1290 | dpif_dummy_register(void) | |
1291 | { | |
1292 | if (!dpif_dummy_class.type) { | |
1293 | dpif_dummy_class = dpif_netdev_class; | |
1294 | dpif_dummy_class.type = "dummy"; | |
1295 | dp_register_provider(&dpif_dummy_class); | |
1296 | } | |
1297 | } |