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72b06300 | 1 | /* |
10a89ef0 | 2 | * Copyright (c) 2009, 2010, 2011, 2012, 2013 Nicira, Inc. |
f1588b1f | 3 | * Copyright (c) 2009 InMon Corp. |
72b06300 BP |
4 | * |
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: | |
8 | * | |
9 | * http://www.apache.org/licenses/LICENSE-2.0 | |
10 | * | |
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. | |
16 | */ | |
17 | ||
18 | #include <config.h> | |
bae473fe | 19 | #include "ofproto-dpif-sflow.h" |
72b06300 | 20 | #include <inttypes.h> |
f6eb6b20 | 21 | #include <sys/socket.h> |
733adf2a | 22 | #include <net/if.h> |
72b06300 BP |
23 | #include <stdlib.h> |
24 | #include "collectors.h" | |
72b06300 | 25 | #include "compiler.h" |
bae473fe | 26 | #include "dpif.h" |
0cc96e48 BP |
27 | #include "hash.h" |
28 | #include "hmap.h" | |
72b06300 | 29 | #include "netdev.h" |
cdee00fd | 30 | #include "netlink.h" |
72b06300 BP |
31 | #include "ofpbuf.h" |
32 | #include "ofproto.h" | |
26233bb4 | 33 | #include "packets.h" |
72b06300 | 34 | #include "poll-loop.h" |
733adf2a | 35 | #include "route-table.h" |
72b06300 BP |
36 | #include "sflow_api.h" |
37 | #include "socket-util.h" | |
38 | #include "timeval.h" | |
72b06300 | 39 | #include "vlog.h" |
975a704c | 40 | #include "lib/odp-util.h" |
392c7182 | 41 | #include "ofproto-provider.h" |
72b06300 | 42 | |
d98e6007 | 43 | VLOG_DEFINE_THIS_MODULE(sflow); |
5136ce49 | 44 | |
bae473fe JP |
45 | struct dpif_sflow_port { |
46 | struct hmap_node hmap_node; /* In struct dpif_sflow's "ports" hmap. */ | |
72b06300 | 47 | SFLDataSource_instance dsi; /* sFlow library's notion of port number. */ |
392c7182 | 48 | struct ofport *ofport; /* To retrive port stats. */ |
4e022ec0 | 49 | odp_port_t odp_port; |
72b06300 BP |
50 | }; |
51 | ||
bae473fe | 52 | struct dpif_sflow { |
72b06300 BP |
53 | struct collectors *collectors; |
54 | SFLAgent *sflow_agent; | |
55 | struct ofproto_sflow_options *options; | |
72b06300 BP |
56 | time_t next_tick; |
57 | size_t n_flood, n_all; | |
bae473fe | 58 | struct hmap ports; /* Contains "struct dpif_sflow_port"s. */ |
6ff686f2 | 59 | uint32_t probability; |
9723bcce | 60 | int ref_cnt; |
72b06300 BP |
61 | }; |
62 | ||
bae473fe JP |
63 | static void dpif_sflow_del_port__(struct dpif_sflow *, |
64 | struct dpif_sflow_port *); | |
0cc96e48 | 65 | |
72b06300 BP |
66 | #define RECEIVER_INDEX 1 |
67 | ||
68 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
69 | ||
fa49ca80 BP |
70 | static bool |
71 | nullable_string_is_equal(const char *a, const char *b) | |
72 | { | |
73 | return a ? b && !strcmp(a, b) : !b; | |
74 | } | |
75 | ||
72b06300 BP |
76 | static bool |
77 | ofproto_sflow_options_equal(const struct ofproto_sflow_options *a, | |
bae473fe | 78 | const struct ofproto_sflow_options *b) |
72b06300 | 79 | { |
81e2083f | 80 | return (sset_equals(&a->targets, &b->targets) |
72b06300 BP |
81 | && a->sampling_rate == b->sampling_rate |
82 | && a->polling_interval == b->polling_interval | |
83 | && a->header_len == b->header_len | |
84 | && a->sub_id == b->sub_id | |
fa49ca80 BP |
85 | && nullable_string_is_equal(a->agent_device, b->agent_device) |
86 | && nullable_string_is_equal(a->control_ip, b->control_ip)); | |
72b06300 BP |
87 | } |
88 | ||
89 | static struct ofproto_sflow_options * | |
90 | ofproto_sflow_options_clone(const struct ofproto_sflow_options *old) | |
91 | { | |
92 | struct ofproto_sflow_options *new = xmemdup(old, sizeof *old); | |
81e2083f | 93 | sset_clone(&new->targets, &old->targets); |
72b06300 BP |
94 | new->agent_device = old->agent_device ? xstrdup(old->agent_device) : NULL; |
95 | new->control_ip = old->control_ip ? xstrdup(old->control_ip) : NULL; | |
96 | return new; | |
97 | } | |
98 | ||
99 | static void | |
100 | ofproto_sflow_options_destroy(struct ofproto_sflow_options *options) | |
101 | { | |
102 | if (options) { | |
81e2083f | 103 | sset_destroy(&options->targets); |
72b06300 BP |
104 | free(options->agent_device); |
105 | free(options->control_ip); | |
106 | free(options); | |
107 | } | |
108 | } | |
109 | ||
110 | /* sFlow library callback to allocate memory. */ | |
111 | static void * | |
67a4917b BP |
112 | sflow_agent_alloc_cb(void *magic OVS_UNUSED, SFLAgent *agent OVS_UNUSED, |
113 | size_t bytes) | |
72b06300 BP |
114 | { |
115 | return calloc(1, bytes); | |
116 | } | |
117 | ||
118 | /* sFlow library callback to free memory. */ | |
119 | static int | |
67a4917b BP |
120 | sflow_agent_free_cb(void *magic OVS_UNUSED, SFLAgent *agent OVS_UNUSED, |
121 | void *obj) | |
72b06300 BP |
122 | { |
123 | free(obj); | |
124 | return 0; | |
125 | } | |
126 | ||
127 | /* sFlow library callback to report error. */ | |
128 | static void | |
67a4917b BP |
129 | sflow_agent_error_cb(void *magic OVS_UNUSED, SFLAgent *agent OVS_UNUSED, |
130 | char *msg) | |
72b06300 BP |
131 | { |
132 | VLOG_WARN("sFlow agent error: %s", msg); | |
133 | } | |
134 | ||
135 | /* sFlow library callback to send datagram. */ | |
136 | static void | |
bae473fe | 137 | sflow_agent_send_packet_cb(void *ds_, SFLAgent *agent OVS_UNUSED, |
67a4917b | 138 | SFLReceiver *receiver OVS_UNUSED, u_char *pkt, |
72b06300 BP |
139 | uint32_t pktLen) |
140 | { | |
bae473fe JP |
141 | struct dpif_sflow *ds = ds_; |
142 | collectors_send(ds->collectors, pkt, pktLen); | |
72b06300 BP |
143 | } |
144 | ||
bae473fe | 145 | static struct dpif_sflow_port * |
4e022ec0 | 146 | dpif_sflow_find_port(const struct dpif_sflow *ds, odp_port_t odp_port) |
0cc96e48 | 147 | { |
bae473fe | 148 | struct dpif_sflow_port *dsp; |
0cc96e48 | 149 | |
f9c0c3ec EJ |
150 | HMAP_FOR_EACH_IN_BUCKET (dsp, hmap_node, hash_odp_port(odp_port), |
151 | &ds->ports) { | |
e1b1d06a | 152 | if (dsp->odp_port == odp_port) { |
bae473fe | 153 | return dsp; |
0cc96e48 BP |
154 | } |
155 | } | |
156 | return NULL; | |
157 | } | |
158 | ||
72b06300 | 159 | static void |
bae473fe | 160 | sflow_agent_get_counters(void *ds_, SFLPoller *poller, |
72b06300 BP |
161 | SFL_COUNTERS_SAMPLE_TYPE *cs) |
162 | { | |
bae473fe | 163 | struct dpif_sflow *ds = ds_; |
72b06300 | 164 | SFLCounters_sample_element elem; |
6c038611 | 165 | enum netdev_features current; |
bae473fe | 166 | struct dpif_sflow_port *dsp; |
72b06300 BP |
167 | SFLIf_counters *counters; |
168 | struct netdev_stats stats; | |
169 | enum netdev_flags flags; | |
72b06300 | 170 | |
4e022ec0 | 171 | dsp = dpif_sflow_find_port(ds, u32_to_odp(poller->bridgePort)); |
bae473fe | 172 | if (!dsp) { |
72b06300 BP |
173 | return; |
174 | } | |
175 | ||
176 | elem.tag = SFLCOUNTERS_GENERIC; | |
177 | counters = &elem.counterBlock.generic; | |
178 | counters->ifIndex = SFL_DS_INDEX(poller->dsi); | |
179 | counters->ifType = 6; | |
392c7182 | 180 | if (!netdev_get_features(dsp->ofport->netdev, ¤t, NULL, NULL, NULL)) { |
bae473fe JP |
181 | /* The values of ifDirection come from MAU MIB (RFC 2668): 0 = unknown, |
182 | 1 = full-duplex, 2 = half-duplex, 3 = in, 4=out */ | |
d02a5f8e | 183 | counters->ifSpeed = netdev_features_to_bps(current, 0); |
72b06300 BP |
184 | counters->ifDirection = (netdev_features_is_full_duplex(current) |
185 | ? 1 : 2); | |
186 | } else { | |
187 | counters->ifSpeed = 100000000; | |
b6dab095 | 188 | counters->ifDirection = 0; |
72b06300 | 189 | } |
392c7182 | 190 | if (!netdev_get_flags(dsp->ofport->netdev, &flags) && flags & NETDEV_UP) { |
72b06300 | 191 | counters->ifStatus = 1; /* ifAdminStatus up. */ |
392c7182 | 192 | if (netdev_get_carrier(dsp->ofport->netdev)) { |
72b06300 BP |
193 | counters->ifStatus |= 2; /* ifOperStatus us. */ |
194 | } | |
195 | } else { | |
196 | counters->ifStatus = 0; /* Down. */ | |
197 | } | |
198 | ||
199 | /* XXX | |
200 | 1. Is the multicast counter filled in? | |
201 | 2. Does the multicast counter include broadcasts? | |
202 | 3. Does the rx_packets counter include multicasts/broadcasts? | |
203 | */ | |
392c7182 | 204 | ofproto_port_get_stats(dsp->ofport, &stats); |
72b06300 BP |
205 | counters->ifInOctets = stats.rx_bytes; |
206 | counters->ifInUcastPkts = stats.rx_packets; | |
207 | counters->ifInMulticastPkts = stats.multicast; | |
208 | counters->ifInBroadcastPkts = -1; | |
209 | counters->ifInDiscards = stats.rx_dropped; | |
210 | counters->ifInErrors = stats.rx_errors; | |
211 | counters->ifInUnknownProtos = -1; | |
212 | counters->ifOutOctets = stats.tx_bytes; | |
213 | counters->ifOutUcastPkts = stats.tx_packets; | |
214 | counters->ifOutMulticastPkts = -1; | |
215 | counters->ifOutBroadcastPkts = -1; | |
216 | counters->ifOutDiscards = stats.tx_dropped; | |
217 | counters->ifOutErrors = stats.tx_errors; | |
218 | counters->ifPromiscuousMode = 0; | |
219 | ||
220 | SFLADD_ELEMENT(cs, &elem); | |
221 | sfl_poller_writeCountersSample(poller, cs); | |
222 | } | |
223 | ||
224 | /* Obtains an address to use for the local sFlow agent and stores it into | |
225 | * '*agent_addr'. Returns true if successful, false on failure. | |
226 | * | |
227 | * The sFlow agent address should be a local IP address that is persistent and | |
228 | * reachable over the network, if possible. The IP address associated with | |
229 | * 'agent_device' is used if it has one, and otherwise 'control_ip', the IP | |
733adf2a LG |
230 | * address used to talk to the controller. If the agent device is not |
231 | * specified then it is figured out by taking a look at the routing table based | |
232 | * on 'targets'. */ | |
72b06300 | 233 | static bool |
733adf2a LG |
234 | sflow_choose_agent_address(const char *agent_device, |
235 | const struct sset *targets, | |
236 | const char *control_ip, | |
72b06300 BP |
237 | SFLAddress *agent_addr) |
238 | { | |
733adf2a | 239 | const char *target; |
72b06300 BP |
240 | struct in_addr in4; |
241 | ||
242 | memset(agent_addr, 0, sizeof *agent_addr); | |
243 | agent_addr->type = SFLADDRESSTYPE_IP_V4; | |
244 | ||
245 | if (agent_device) { | |
733adf2a LG |
246 | if (!netdev_get_in4_by_name(agent_device, &in4)) { |
247 | goto success; | |
248 | } | |
249 | } | |
250 | ||
251 | SSET_FOR_EACH (target, targets) { | |
252 | struct sockaddr_in sin; | |
253 | char name[IFNAMSIZ]; | |
254 | ||
255 | if (inet_parse_active(target, SFL_DEFAULT_COLLECTOR_PORT, &sin) | |
256 | && route_table_get_name(sin.sin_addr.s_addr, name) | |
257 | && !netdev_get_in4_by_name(name, &in4)) { | |
258 | goto success; | |
72b06300 BP |
259 | } |
260 | } | |
261 | ||
262 | if (control_ip && !lookup_ip(control_ip, &in4)) { | |
263 | goto success; | |
264 | } | |
265 | ||
266 | VLOG_ERR("could not determine IP address for sFlow agent"); | |
267 | return false; | |
268 | ||
269 | success: | |
6506f45c | 270 | agent_addr->address.ip_v4.addr = (OVS_FORCE uint32_t) in4.s_addr; |
72b06300 BP |
271 | return true; |
272 | } | |
273 | ||
274 | void | |
bae473fe | 275 | dpif_sflow_clear(struct dpif_sflow *ds) |
72b06300 | 276 | { |
bae473fe JP |
277 | if (ds->sflow_agent) { |
278 | sfl_agent_release(ds->sflow_agent); | |
279 | ds->sflow_agent = NULL; | |
72b06300 | 280 | } |
bae473fe JP |
281 | collectors_destroy(ds->collectors); |
282 | ds->collectors = NULL; | |
283 | ofproto_sflow_options_destroy(ds->options); | |
284 | ds->options = NULL; | |
72b06300 | 285 | |
72b06300 | 286 | /* Turn off sampling to save CPU cycles. */ |
6ff686f2 | 287 | ds->probability = 0; |
72b06300 BP |
288 | } |
289 | ||
290 | bool | |
bae473fe | 291 | dpif_sflow_is_enabled(const struct dpif_sflow *ds) |
72b06300 | 292 | { |
bae473fe | 293 | return ds->collectors != NULL; |
72b06300 BP |
294 | } |
295 | ||
bae473fe | 296 | struct dpif_sflow * |
4213f19d | 297 | dpif_sflow_create(void) |
72b06300 | 298 | { |
bae473fe | 299 | struct dpif_sflow *ds; |
72b06300 | 300 | |
bae473fe | 301 | ds = xcalloc(1, sizeof *ds); |
bae473fe JP |
302 | ds->next_tick = time_now() + 1; |
303 | hmap_init(&ds->ports); | |
6ff686f2 | 304 | ds->probability = 0; |
733adf2a | 305 | route_table_register(); |
9723bcce | 306 | ds->ref_cnt = 1; |
733adf2a | 307 | |
bae473fe | 308 | return ds; |
72b06300 BP |
309 | } |
310 | ||
9723bcce EJ |
311 | struct dpif_sflow * |
312 | dpif_sflow_ref(const struct dpif_sflow *ds_) | |
313 | { | |
314 | struct dpif_sflow *ds = CONST_CAST(struct dpif_sflow *, ds_); | |
315 | if (ds) { | |
316 | ovs_assert(ds->ref_cnt > 0); | |
317 | ds->ref_cnt++; | |
318 | } | |
319 | return ds; | |
320 | } | |
321 | ||
6ff686f2 PS |
322 | /* 32-bit fraction of packets to sample with. A value of 0 samples no packets, |
323 | * a value of %UINT32_MAX samples all packets and intermediate values sample | |
324 | * intermediate fractions of packets. */ | |
325 | uint32_t | |
326 | dpif_sflow_get_probability(const struct dpif_sflow *ds) | |
327 | { | |
328 | return ds->probability; | |
329 | } | |
330 | ||
72b06300 | 331 | void |
9723bcce | 332 | dpif_sflow_unref(struct dpif_sflow *ds) |
72b06300 | 333 | { |
9723bcce EJ |
334 | if (!ds) { |
335 | return; | |
336 | } | |
337 | ||
338 | ovs_assert(ds->ref_cnt > 0); | |
339 | if (!--ds->ref_cnt) { | |
bae473fe | 340 | struct dpif_sflow_port *dsp, *next; |
32d9dc11 | 341 | |
733adf2a | 342 | route_table_unregister(); |
bae473fe JP |
343 | dpif_sflow_clear(ds); |
344 | HMAP_FOR_EACH_SAFE (dsp, next, hmap_node, &ds->ports) { | |
345 | dpif_sflow_del_port__(ds, dsp); | |
32d9dc11 | 346 | } |
bae473fe JP |
347 | hmap_destroy(&ds->ports); |
348 | free(ds); | |
72b06300 BP |
349 | } |
350 | } | |
351 | ||
352 | static void | |
392c7182 | 353 | dpif_sflow_add_poller(struct dpif_sflow *ds, struct dpif_sflow_port *dsp) |
72b06300 | 354 | { |
bae473fe | 355 | SFLPoller *poller = sfl_agent_addPoller(ds->sflow_agent, &dsp->dsi, ds, |
72b06300 | 356 | sflow_agent_get_counters); |
bae473fe | 357 | sfl_poller_set_sFlowCpInterval(poller, ds->options->polling_interval); |
72b06300 | 358 | sfl_poller_set_sFlowCpReceiver(poller, RECEIVER_INDEX); |
4e022ec0 | 359 | sfl_poller_set_bridgePort(poller, odp_to_u32(dsp->odp_port)); |
72b06300 BP |
360 | } |
361 | ||
362 | void | |
e1b1d06a | 363 | dpif_sflow_add_port(struct dpif_sflow *ds, struct ofport *ofport, |
4e022ec0 | 364 | odp_port_t odp_port) |
72b06300 | 365 | { |
bae473fe | 366 | struct dpif_sflow_port *dsp; |
743cea45 | 367 | int ifindex; |
72b06300 | 368 | |
bae473fe | 369 | dpif_sflow_del_port(ds, odp_port); |
72b06300 | 370 | |
392c7182 | 371 | ifindex = netdev_get_ifindex(ofport->netdev); |
743cea45 | 372 | |
72b06300 | 373 | if (ifindex <= 0) { |
743cea45 NM |
374 | /* Not an ifindex port, so do not add a cross-reference to it here */ |
375 | return; | |
72b06300 | 376 | } |
743cea45 NM |
377 | |
378 | /* Add to table of ports. */ | |
379 | dsp = xmalloc(sizeof *dsp); | |
392c7182 | 380 | dsp->ofport = ofport; |
e1b1d06a | 381 | dsp->odp_port = odp_port; |
743cea45 | 382 | SFL_DS_SET(dsp->dsi, SFL_DSCLASS_IFINDEX, ifindex, 0); |
f9c0c3ec | 383 | hmap_insert(&ds->ports, &dsp->hmap_node, hash_odp_port(odp_port)); |
72b06300 | 384 | |
743cea45 | 385 | /* Add poller. */ |
bae473fe | 386 | if (ds->sflow_agent) { |
392c7182 | 387 | dpif_sflow_add_poller(ds, dsp); |
72b06300 BP |
388 | } |
389 | } | |
390 | ||
0cc96e48 | 391 | static void |
bae473fe | 392 | dpif_sflow_del_port__(struct dpif_sflow *ds, struct dpif_sflow_port *dsp) |
0cc96e48 | 393 | { |
bae473fe JP |
394 | if (ds->sflow_agent) { |
395 | sfl_agent_removePoller(ds->sflow_agent, &dsp->dsi); | |
396 | sfl_agent_removeSampler(ds->sflow_agent, &dsp->dsi); | |
0cc96e48 | 397 | } |
bae473fe JP |
398 | hmap_remove(&ds->ports, &dsp->hmap_node); |
399 | free(dsp); | |
0cc96e48 BP |
400 | } |
401 | ||
72b06300 | 402 | void |
4e022ec0 | 403 | dpif_sflow_del_port(struct dpif_sflow *ds, odp_port_t odp_port) |
72b06300 | 404 | { |
bae473fe JP |
405 | struct dpif_sflow_port *dsp = dpif_sflow_find_port(ds, odp_port); |
406 | if (dsp) { | |
407 | dpif_sflow_del_port__(ds, dsp); | |
72b06300 BP |
408 | } |
409 | } | |
410 | ||
411 | void | |
bae473fe JP |
412 | dpif_sflow_set_options(struct dpif_sflow *ds, |
413 | const struct ofproto_sflow_options *options) | |
72b06300 | 414 | { |
bae473fe | 415 | struct dpif_sflow_port *dsp; |
72b06300 | 416 | bool options_changed; |
72b06300 | 417 | SFLReceiver *receiver; |
72b06300 BP |
418 | SFLAddress agentIP; |
419 | time_t now; | |
743cea45 NM |
420 | SFLDataSource_instance dsi; |
421 | uint32_t dsIndex; | |
422 | SFLSampler *sampler; | |
72b06300 | 423 | |
81e2083f | 424 | if (sset_is_empty(&options->targets) || !options->sampling_rate) { |
a68813c3 BP |
425 | /* No point in doing any work if there are no targets or nothing to |
426 | * sample. */ | |
bae473fe | 427 | dpif_sflow_clear(ds); |
a68813c3 BP |
428 | return; |
429 | } | |
430 | ||
bae473fe JP |
431 | options_changed = (!ds->options |
432 | || !ofproto_sflow_options_equal(options, ds->options)); | |
72b06300 BP |
433 | |
434 | /* Configure collectors if options have changed or if we're shortchanged in | |
435 | * collectors (which indicates that opening one or more of the configured | |
436 | * collectors failed, so that we should retry). */ | |
437 | if (options_changed | |
bae473fe JP |
438 | || collectors_count(ds->collectors) < sset_count(&options->targets)) { |
439 | collectors_destroy(ds->collectors); | |
02ef592c | 440 | collectors_create(&options->targets, SFL_DEFAULT_COLLECTOR_PORT, |
bae473fe JP |
441 | &ds->collectors); |
442 | if (ds->collectors == NULL) { | |
a68813c3 BP |
443 | VLOG_WARN_RL(&rl, "no collectors could be initialized, " |
444 | "sFlow disabled"); | |
bae473fe | 445 | dpif_sflow_clear(ds); |
72b06300 BP |
446 | return; |
447 | } | |
448 | } | |
449 | ||
733adf2a LG |
450 | /* Choose agent IP address and agent device (if not yet setup) */ |
451 | if (!sflow_choose_agent_address(options->agent_device, | |
452 | &options->targets, | |
453 | options->control_ip, &agentIP)) { | |
454 | dpif_sflow_clear(ds); | |
455 | return; | |
456 | } | |
457 | ||
72b06300 BP |
458 | /* Avoid reconfiguring if options didn't change. */ |
459 | if (!options_changed) { | |
460 | return; | |
461 | } | |
bae473fe JP |
462 | ofproto_sflow_options_destroy(ds->options); |
463 | ds->options = ofproto_sflow_options_clone(options); | |
72b06300 | 464 | |
72b06300 BP |
465 | /* Create agent. */ |
466 | VLOG_INFO("creating sFlow agent %d", options->sub_id); | |
bae473fe JP |
467 | if (ds->sflow_agent) { |
468 | sfl_agent_release(ds->sflow_agent); | |
72b06300 | 469 | } |
bae473fe | 470 | ds->sflow_agent = xcalloc(1, sizeof *ds->sflow_agent); |
c73814a3 | 471 | now = time_wall(); |
bae473fe | 472 | sfl_agent_init(ds->sflow_agent, |
72b06300 BP |
473 | &agentIP, |
474 | options->sub_id, | |
475 | now, /* Boot time. */ | |
476 | now, /* Current time. */ | |
bae473fe | 477 | ds, /* Pointer supplied to callbacks. */ |
72b06300 BP |
478 | sflow_agent_alloc_cb, |
479 | sflow_agent_free_cb, | |
480 | sflow_agent_error_cb, | |
481 | sflow_agent_send_packet_cb); | |
482 | ||
bae473fe | 483 | receiver = sfl_agent_addReceiver(ds->sflow_agent); |
e53df206 | 484 | sfl_receiver_set_sFlowRcvrOwner(receiver, "Open vSwitch sFlow"); |
72b06300 BP |
485 | sfl_receiver_set_sFlowRcvrTimeout(receiver, 0xffffffff); |
486 | ||
72b06300 | 487 | /* Set the sampling_rate down in the datapath. */ |
6ff686f2 | 488 | ds->probability = MAX(1, UINT32_MAX / ds->options->sampling_rate); |
72b06300 | 489 | |
743cea45 NM |
490 | /* Add a single sampler for the bridge. This appears as a PHYSICAL_ENTITY |
491 | because it is associated with the hypervisor, and interacts with the server | |
492 | hardware directly. The sub_id is used to distinguish this sampler from | |
493 | others on other bridges within the same agent. */ | |
494 | dsIndex = 1000 + options->sub_id; | |
495 | SFL_DS_SET(dsi, SFL_DSCLASS_PHYSICAL_ENTITY, dsIndex, 0); | |
496 | sampler = sfl_agent_addSampler(ds->sflow_agent, &dsi); | |
497 | sfl_sampler_set_sFlowFsPacketSamplingRate(sampler, ds->options->sampling_rate); | |
498 | sfl_sampler_set_sFlowFsMaximumHeaderSize(sampler, ds->options->header_len); | |
499 | sfl_sampler_set_sFlowFsReceiver(sampler, RECEIVER_INDEX); | |
500 | ||
501 | /* Add pollers for the currently known ifindex-ports */ | |
bae473fe | 502 | HMAP_FOR_EACH (dsp, hmap_node, &ds->ports) { |
392c7182 | 503 | dpif_sflow_add_poller(ds, dsp); |
72b06300 BP |
504 | } |
505 | } | |
506 | ||
6ff686f2 | 507 | int |
bae473fe | 508 | dpif_sflow_odp_port_to_ifindex(const struct dpif_sflow *ds, |
4e022ec0 | 509 | odp_port_t odp_port) |
c1e98da1 | 510 | { |
bae473fe JP |
511 | struct dpif_sflow_port *dsp = dpif_sflow_find_port(ds, odp_port); |
512 | return dsp ? SFL_DS_INDEX(dsp->dsi) : 0; | |
c1e98da1 BP |
513 | } |
514 | ||
72b06300 | 515 | void |
6ff686f2 | 516 | dpif_sflow_received(struct dpif_sflow *ds, struct ofpbuf *packet, |
4e022ec0 | 517 | const struct flow *flow, odp_port_t odp_in_port, |
1673e0e4 | 518 | const union user_action_cookie *cookie) |
72b06300 BP |
519 | { |
520 | SFL_FLOW_SAMPLE_TYPE fs; | |
521 | SFLFlow_sample_element hdrElem; | |
522 | SFLSampled_header *header; | |
523 | SFLFlow_sample_element switchElem; | |
56fd8edf | 524 | SFLSampler *sampler; |
6ff686f2 | 525 | struct dpif_sflow_port *in_dsp; |
1673e0e4 | 526 | ovs_be16 vlan_tci; |
72b06300 | 527 | |
743cea45 NM |
528 | sampler = ds->sflow_agent->samplers; |
529 | if (!sampler) { | |
6ff686f2 PS |
530 | return; |
531 | } | |
6ff686f2 | 532 | |
743cea45 NM |
533 | /* Build a flow sample. */ |
534 | memset(&fs, 0, sizeof fs); | |
72b06300 | 535 | |
743cea45 NM |
536 | /* Look up the input ifIndex if this port has one. Otherwise just |
537 | * leave it as 0 (meaning 'unknown') and continue. */ | |
538 | in_dsp = dpif_sflow_find_port(ds, odp_in_port); | |
539 | if (in_dsp) { | |
540 | fs.input = SFL_DS_INDEX(in_dsp->dsi); | |
56fd8edf BP |
541 | } |
542 | ||
743cea45 NM |
543 | /* Make the assumption that the random number generator in the datapath converges |
544 | * to the configured mean, and just increment the samplePool by the configured | |
545 | * sampling rate every time. */ | |
546 | sampler->samplePool += sfl_sampler_get_sFlowFsPacketSamplingRate(sampler); | |
547 | ||
72b06300 BP |
548 | /* Sampled header. */ |
549 | memset(&hdrElem, 0, sizeof hdrElem); | |
550 | hdrElem.tag = SFLFLOW_HEADER; | |
551 | header = &hdrElem.flowType.header; | |
552 | header->header_protocol = SFLHEADER_ETHERNET_ISO8023; | |
c62caaa3 | 553 | /* The frame_length should include the Ethernet FCS (4 bytes), |
743cea45 | 554 | * but it has already been stripped, so we need to add 4 here. */ |
6ff686f2 | 555 | header->frame_length = packet->size + 4; |
c62caaa3 NM |
556 | /* Ethernet FCS stripped off. */ |
557 | header->stripped = 4; | |
6ff686f2 | 558 | header->header_length = MIN(packet->size, |
856081f6 | 559 | sampler->sFlowFsMaximumHeaderSize); |
6ff686f2 | 560 | header->header_bytes = packet->data; |
72b06300 BP |
561 | |
562 | /* Add extended switch element. */ | |
563 | memset(&switchElem, 0, sizeof(switchElem)); | |
564 | switchElem.tag = SFLFLOW_EX_SWITCH; | |
856081f6 BP |
565 | switchElem.flowType.sw.src_vlan = vlan_tci_to_vid(flow->vlan_tci); |
566 | switchElem.flowType.sw.src_priority = vlan_tci_to_pcp(flow->vlan_tci); | |
6ff686f2 PS |
567 | |
568 | /* Retrieve data from user_action_cookie. */ | |
1673e0e4 BP |
569 | vlan_tci = cookie->sflow.vlan_tci; |
570 | switchElem.flowType.sw.dst_vlan = vlan_tci_to_vid(vlan_tci); | |
571 | switchElem.flowType.sw.dst_priority = vlan_tci_to_pcp(vlan_tci); | |
46b47a41 | 572 | |
1673e0e4 | 573 | fs.output = cookie->sflow.output; |
72b06300 BP |
574 | |
575 | /* Submit the flow sample to be encoded into the next datagram. */ | |
576 | SFLADD_ELEMENT(&fs, &hdrElem); | |
577 | SFLADD_ELEMENT(&fs, &switchElem); | |
578 | sfl_sampler_writeFlowSample(sampler, &fs); | |
579 | } | |
580 | ||
72b06300 | 581 | void |
bae473fe | 582 | dpif_sflow_run(struct dpif_sflow *ds) |
72b06300 | 583 | { |
bae473fe | 584 | if (dpif_sflow_is_enabled(ds)) { |
72b06300 | 585 | time_t now = time_now(); |
733adf2a | 586 | route_table_run(); |
bae473fe JP |
587 | if (now >= ds->next_tick) { |
588 | sfl_agent_tick(ds->sflow_agent, time_wall()); | |
589 | ds->next_tick = now + 1; | |
72b06300 BP |
590 | } |
591 | } | |
592 | } | |
593 | ||
594 | void | |
bae473fe | 595 | dpif_sflow_wait(struct dpif_sflow *ds) |
72b06300 | 596 | { |
bae473fe JP |
597 | if (dpif_sflow_is_enabled(ds)) { |
598 | poll_timer_wait_until(ds->next_tick * 1000LL); | |
72b06300 BP |
599 | } |
600 | } |