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72b06300 | 1 | /* |
e0edde6f | 2 | * Copyright (c) 2009, 2010, 2011, 2012 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. */ |
72b06300 BP |
49 | }; |
50 | ||
bae473fe | 51 | struct dpif_sflow { |
72b06300 BP |
52 | struct collectors *collectors; |
53 | SFLAgent *sflow_agent; | |
54 | struct ofproto_sflow_options *options; | |
55 | struct dpif *dpif; | |
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; |
72b06300 BP |
60 | }; |
61 | ||
bae473fe JP |
62 | static void dpif_sflow_del_port__(struct dpif_sflow *, |
63 | struct dpif_sflow_port *); | |
0cc96e48 | 64 | |
72b06300 BP |
65 | #define RECEIVER_INDEX 1 |
66 | ||
67 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
68 | ||
fa49ca80 BP |
69 | static bool |
70 | nullable_string_is_equal(const char *a, const char *b) | |
71 | { | |
72 | return a ? b && !strcmp(a, b) : !b; | |
73 | } | |
74 | ||
72b06300 BP |
75 | static bool |
76 | ofproto_sflow_options_equal(const struct ofproto_sflow_options *a, | |
bae473fe | 77 | const struct ofproto_sflow_options *b) |
72b06300 | 78 | { |
81e2083f | 79 | return (sset_equals(&a->targets, &b->targets) |
72b06300 BP |
80 | && a->sampling_rate == b->sampling_rate |
81 | && a->polling_interval == b->polling_interval | |
82 | && a->header_len == b->header_len | |
83 | && a->sub_id == b->sub_id | |
fa49ca80 BP |
84 | && nullable_string_is_equal(a->agent_device, b->agent_device) |
85 | && nullable_string_is_equal(a->control_ip, b->control_ip)); | |
72b06300 BP |
86 | } |
87 | ||
88 | static struct ofproto_sflow_options * | |
89 | ofproto_sflow_options_clone(const struct ofproto_sflow_options *old) | |
90 | { | |
91 | struct ofproto_sflow_options *new = xmemdup(old, sizeof *old); | |
81e2083f | 92 | sset_clone(&new->targets, &old->targets); |
72b06300 BP |
93 | new->agent_device = old->agent_device ? xstrdup(old->agent_device) : NULL; |
94 | new->control_ip = old->control_ip ? xstrdup(old->control_ip) : NULL; | |
95 | return new; | |
96 | } | |
97 | ||
98 | static void | |
99 | ofproto_sflow_options_destroy(struct ofproto_sflow_options *options) | |
100 | { | |
101 | if (options) { | |
81e2083f | 102 | sset_destroy(&options->targets); |
72b06300 BP |
103 | free(options->agent_device); |
104 | free(options->control_ip); | |
105 | free(options); | |
106 | } | |
107 | } | |
108 | ||
109 | /* sFlow library callback to allocate memory. */ | |
110 | static void * | |
67a4917b BP |
111 | sflow_agent_alloc_cb(void *magic OVS_UNUSED, SFLAgent *agent OVS_UNUSED, |
112 | size_t bytes) | |
72b06300 BP |
113 | { |
114 | return calloc(1, bytes); | |
115 | } | |
116 | ||
117 | /* sFlow library callback to free memory. */ | |
118 | static int | |
67a4917b BP |
119 | sflow_agent_free_cb(void *magic OVS_UNUSED, SFLAgent *agent OVS_UNUSED, |
120 | void *obj) | |
72b06300 BP |
121 | { |
122 | free(obj); | |
123 | return 0; | |
124 | } | |
125 | ||
126 | /* sFlow library callback to report error. */ | |
127 | static void | |
67a4917b BP |
128 | sflow_agent_error_cb(void *magic OVS_UNUSED, SFLAgent *agent OVS_UNUSED, |
129 | char *msg) | |
72b06300 BP |
130 | { |
131 | VLOG_WARN("sFlow agent error: %s", msg); | |
132 | } | |
133 | ||
134 | /* sFlow library callback to send datagram. */ | |
135 | static void | |
bae473fe | 136 | sflow_agent_send_packet_cb(void *ds_, SFLAgent *agent OVS_UNUSED, |
67a4917b | 137 | SFLReceiver *receiver OVS_UNUSED, u_char *pkt, |
72b06300 BP |
138 | uint32_t pktLen) |
139 | { | |
bae473fe JP |
140 | struct dpif_sflow *ds = ds_; |
141 | collectors_send(ds->collectors, pkt, pktLen); | |
72b06300 BP |
142 | } |
143 | ||
bae473fe JP |
144 | static struct dpif_sflow_port * |
145 | dpif_sflow_find_port(const struct dpif_sflow *ds, uint16_t odp_port) | |
0cc96e48 | 146 | { |
bae473fe | 147 | struct dpif_sflow_port *dsp; |
0cc96e48 | 148 | |
bae473fe JP |
149 | HMAP_FOR_EACH_IN_BUCKET (dsp, hmap_node, |
150 | hash_int(odp_port, 0), &ds->ports) { | |
392c7182 | 151 | if (ofp_port_to_odp_port(dsp->ofport->ofp_port) == odp_port) { |
bae473fe | 152 | return dsp; |
0cc96e48 BP |
153 | } |
154 | } | |
155 | return NULL; | |
156 | } | |
157 | ||
72b06300 | 158 | static void |
bae473fe | 159 | sflow_agent_get_counters(void *ds_, SFLPoller *poller, |
72b06300 BP |
160 | SFL_COUNTERS_SAMPLE_TYPE *cs) |
161 | { | |
bae473fe | 162 | struct dpif_sflow *ds = ds_; |
72b06300 | 163 | SFLCounters_sample_element elem; |
6c038611 | 164 | enum netdev_features current; |
bae473fe | 165 | struct dpif_sflow_port *dsp; |
72b06300 BP |
166 | SFLIf_counters *counters; |
167 | struct netdev_stats stats; | |
168 | enum netdev_flags flags; | |
72b06300 | 169 | |
bae473fe JP |
170 | dsp = dpif_sflow_find_port(ds, poller->bridgePort); |
171 | if (!dsp) { | |
72b06300 BP |
172 | return; |
173 | } | |
174 | ||
175 | elem.tag = SFLCOUNTERS_GENERIC; | |
176 | counters = &elem.counterBlock.generic; | |
177 | counters->ifIndex = SFL_DS_INDEX(poller->dsi); | |
178 | counters->ifType = 6; | |
392c7182 | 179 | if (!netdev_get_features(dsp->ofport->netdev, ¤t, NULL, NULL, NULL)) { |
bae473fe JP |
180 | /* The values of ifDirection come from MAU MIB (RFC 2668): 0 = unknown, |
181 | 1 = full-duplex, 2 = half-duplex, 3 = in, 4=out */ | |
72b06300 BP |
182 | counters->ifSpeed = netdev_features_to_bps(current); |
183 | counters->ifDirection = (netdev_features_is_full_duplex(current) | |
184 | ? 1 : 2); | |
185 | } else { | |
186 | counters->ifSpeed = 100000000; | |
b6dab095 | 187 | counters->ifDirection = 0; |
72b06300 | 188 | } |
392c7182 | 189 | if (!netdev_get_flags(dsp->ofport->netdev, &flags) && flags & NETDEV_UP) { |
72b06300 | 190 | counters->ifStatus = 1; /* ifAdminStatus up. */ |
392c7182 | 191 | if (netdev_get_carrier(dsp->ofport->netdev)) { |
72b06300 BP |
192 | counters->ifStatus |= 2; /* ifOperStatus us. */ |
193 | } | |
194 | } else { | |
195 | counters->ifStatus = 0; /* Down. */ | |
196 | } | |
197 | ||
198 | /* XXX | |
199 | 1. Is the multicast counter filled in? | |
200 | 2. Does the multicast counter include broadcasts? | |
201 | 3. Does the rx_packets counter include multicasts/broadcasts? | |
202 | */ | |
392c7182 | 203 | ofproto_port_get_stats(dsp->ofport, &stats); |
72b06300 BP |
204 | counters->ifInOctets = stats.rx_bytes; |
205 | counters->ifInUcastPkts = stats.rx_packets; | |
206 | counters->ifInMulticastPkts = stats.multicast; | |
207 | counters->ifInBroadcastPkts = -1; | |
208 | counters->ifInDiscards = stats.rx_dropped; | |
209 | counters->ifInErrors = stats.rx_errors; | |
210 | counters->ifInUnknownProtos = -1; | |
211 | counters->ifOutOctets = stats.tx_bytes; | |
212 | counters->ifOutUcastPkts = stats.tx_packets; | |
213 | counters->ifOutMulticastPkts = -1; | |
214 | counters->ifOutBroadcastPkts = -1; | |
215 | counters->ifOutDiscards = stats.tx_dropped; | |
216 | counters->ifOutErrors = stats.tx_errors; | |
217 | counters->ifPromiscuousMode = 0; | |
218 | ||
219 | SFLADD_ELEMENT(cs, &elem); | |
220 | sfl_poller_writeCountersSample(poller, cs); | |
221 | } | |
222 | ||
223 | /* Obtains an address to use for the local sFlow agent and stores it into | |
224 | * '*agent_addr'. Returns true if successful, false on failure. | |
225 | * | |
226 | * The sFlow agent address should be a local IP address that is persistent and | |
227 | * reachable over the network, if possible. The IP address associated with | |
228 | * 'agent_device' is used if it has one, and otherwise 'control_ip', the IP | |
733adf2a LG |
229 | * address used to talk to the controller. If the agent device is not |
230 | * specified then it is figured out by taking a look at the routing table based | |
231 | * on 'targets'. */ | |
72b06300 | 232 | static bool |
733adf2a LG |
233 | sflow_choose_agent_address(const char *agent_device, |
234 | const struct sset *targets, | |
235 | const char *control_ip, | |
72b06300 BP |
236 | SFLAddress *agent_addr) |
237 | { | |
733adf2a | 238 | const char *target; |
72b06300 BP |
239 | struct in_addr in4; |
240 | ||
241 | memset(agent_addr, 0, sizeof *agent_addr); | |
242 | agent_addr->type = SFLADDRESSTYPE_IP_V4; | |
243 | ||
244 | if (agent_device) { | |
733adf2a LG |
245 | if (!netdev_get_in4_by_name(agent_device, &in4)) { |
246 | goto success; | |
247 | } | |
248 | } | |
249 | ||
250 | SSET_FOR_EACH (target, targets) { | |
251 | struct sockaddr_in sin; | |
252 | char name[IFNAMSIZ]; | |
253 | ||
254 | if (inet_parse_active(target, SFL_DEFAULT_COLLECTOR_PORT, &sin) | |
255 | && route_table_get_name(sin.sin_addr.s_addr, name) | |
256 | && !netdev_get_in4_by_name(name, &in4)) { | |
257 | goto success; | |
72b06300 BP |
258 | } |
259 | } | |
260 | ||
261 | if (control_ip && !lookup_ip(control_ip, &in4)) { | |
262 | goto success; | |
263 | } | |
264 | ||
265 | VLOG_ERR("could not determine IP address for sFlow agent"); | |
266 | return false; | |
267 | ||
268 | success: | |
6506f45c | 269 | agent_addr->address.ip_v4.addr = (OVS_FORCE uint32_t) in4.s_addr; |
72b06300 BP |
270 | return true; |
271 | } | |
272 | ||
273 | void | |
bae473fe | 274 | dpif_sflow_clear(struct dpif_sflow *ds) |
72b06300 | 275 | { |
bae473fe JP |
276 | if (ds->sflow_agent) { |
277 | sfl_agent_release(ds->sflow_agent); | |
278 | ds->sflow_agent = NULL; | |
72b06300 | 279 | } |
bae473fe JP |
280 | collectors_destroy(ds->collectors); |
281 | ds->collectors = NULL; | |
282 | ofproto_sflow_options_destroy(ds->options); | |
283 | ds->options = NULL; | |
72b06300 | 284 | |
72b06300 | 285 | /* Turn off sampling to save CPU cycles. */ |
6ff686f2 | 286 | ds->probability = 0; |
72b06300 BP |
287 | } |
288 | ||
289 | bool | |
bae473fe | 290 | dpif_sflow_is_enabled(const struct dpif_sflow *ds) |
72b06300 | 291 | { |
bae473fe | 292 | return ds->collectors != NULL; |
72b06300 BP |
293 | } |
294 | ||
bae473fe JP |
295 | struct dpif_sflow * |
296 | dpif_sflow_create(struct dpif *dpif) | |
72b06300 | 297 | { |
bae473fe | 298 | struct dpif_sflow *ds; |
72b06300 | 299 | |
bae473fe JP |
300 | ds = xcalloc(1, sizeof *ds); |
301 | ds->dpif = dpif; | |
302 | ds->next_tick = time_now() + 1; | |
303 | hmap_init(&ds->ports); | |
6ff686f2 | 304 | ds->probability = 0; |
733adf2a LG |
305 | route_table_register(); |
306 | ||
bae473fe | 307 | return ds; |
72b06300 BP |
308 | } |
309 | ||
6ff686f2 PS |
310 | /* 32-bit fraction of packets to sample with. A value of 0 samples no packets, |
311 | * a value of %UINT32_MAX samples all packets and intermediate values sample | |
312 | * intermediate fractions of packets. */ | |
313 | uint32_t | |
314 | dpif_sflow_get_probability(const struct dpif_sflow *ds) | |
315 | { | |
316 | return ds->probability; | |
317 | } | |
318 | ||
72b06300 | 319 | void |
bae473fe | 320 | dpif_sflow_destroy(struct dpif_sflow *ds) |
72b06300 | 321 | { |
bae473fe JP |
322 | if (ds) { |
323 | struct dpif_sflow_port *dsp, *next; | |
32d9dc11 | 324 | |
733adf2a | 325 | route_table_unregister(); |
bae473fe JP |
326 | dpif_sflow_clear(ds); |
327 | HMAP_FOR_EACH_SAFE (dsp, next, hmap_node, &ds->ports) { | |
328 | dpif_sflow_del_port__(ds, dsp); | |
32d9dc11 | 329 | } |
bae473fe JP |
330 | hmap_destroy(&ds->ports); |
331 | free(ds); | |
72b06300 BP |
332 | } |
333 | } | |
334 | ||
335 | static void | |
392c7182 | 336 | dpif_sflow_add_poller(struct dpif_sflow *ds, struct dpif_sflow_port *dsp) |
72b06300 | 337 | { |
bae473fe | 338 | SFLPoller *poller = sfl_agent_addPoller(ds->sflow_agent, &dsp->dsi, ds, |
72b06300 | 339 | sflow_agent_get_counters); |
bae473fe | 340 | sfl_poller_set_sFlowCpInterval(poller, ds->options->polling_interval); |
72b06300 | 341 | sfl_poller_set_sFlowCpReceiver(poller, RECEIVER_INDEX); |
392c7182 PS |
342 | sfl_poller_set_bridgePort(poller, |
343 | ofp_port_to_odp_port(dsp->ofport->ofp_port)); | |
72b06300 BP |
344 | } |
345 | ||
56fd8edf | 346 | static void |
bae473fe | 347 | dpif_sflow_add_sampler(struct dpif_sflow *ds, struct dpif_sflow_port *dsp) |
56fd8edf | 348 | { |
bae473fe JP |
349 | SFLSampler *sampler = sfl_agent_addSampler(ds->sflow_agent, &dsp->dsi); |
350 | sfl_sampler_set_sFlowFsPacketSamplingRate(sampler, ds->options->sampling_rate); | |
351 | sfl_sampler_set_sFlowFsMaximumHeaderSize(sampler, ds->options->header_len); | |
56fd8edf BP |
352 | sfl_sampler_set_sFlowFsReceiver(sampler, RECEIVER_INDEX); |
353 | } | |
354 | ||
72b06300 | 355 | void |
392c7182 | 356 | dpif_sflow_add_port(struct dpif_sflow *ds, struct ofport *ofport) |
72b06300 | 357 | { |
bae473fe | 358 | struct dpif_sflow_port *dsp; |
392c7182 | 359 | uint16_t odp_port = ofp_port_to_odp_port(ofport->ofp_port); |
72b06300 | 360 | uint32_t ifindex; |
72b06300 | 361 | |
bae473fe | 362 | dpif_sflow_del_port(ds, odp_port); |
72b06300 | 363 | |
72b06300 | 364 | /* Add to table of ports. */ |
bae473fe | 365 | dsp = xmalloc(sizeof *dsp); |
392c7182 | 366 | ifindex = netdev_get_ifindex(ofport->netdev); |
72b06300 | 367 | if (ifindex <= 0) { |
bae473fe | 368 | ifindex = (ds->sflow_agent->subId << 16) + odp_port; |
72b06300 | 369 | } |
392c7182 | 370 | dsp->ofport = ofport; |
bae473fe | 371 | SFL_DS_SET(dsp->dsi, 0, ifindex, 0); |
bae473fe | 372 | hmap_insert(&ds->ports, &dsp->hmap_node, hash_int(odp_port, 0)); |
72b06300 | 373 | |
5586445e | 374 | /* Add poller and sampler. */ |
bae473fe | 375 | if (ds->sflow_agent) { |
392c7182 | 376 | dpif_sflow_add_poller(ds, dsp); |
bae473fe | 377 | dpif_sflow_add_sampler(ds, dsp); |
72b06300 BP |
378 | } |
379 | } | |
380 | ||
0cc96e48 | 381 | static void |
bae473fe | 382 | dpif_sflow_del_port__(struct dpif_sflow *ds, struct dpif_sflow_port *dsp) |
0cc96e48 | 383 | { |
bae473fe JP |
384 | if (ds->sflow_agent) { |
385 | sfl_agent_removePoller(ds->sflow_agent, &dsp->dsi); | |
386 | sfl_agent_removeSampler(ds->sflow_agent, &dsp->dsi); | |
0cc96e48 | 387 | } |
bae473fe JP |
388 | hmap_remove(&ds->ports, &dsp->hmap_node); |
389 | free(dsp); | |
0cc96e48 BP |
390 | } |
391 | ||
72b06300 | 392 | void |
bae473fe | 393 | dpif_sflow_del_port(struct dpif_sflow *ds, uint16_t odp_port) |
72b06300 | 394 | { |
bae473fe JP |
395 | struct dpif_sflow_port *dsp = dpif_sflow_find_port(ds, odp_port); |
396 | if (dsp) { | |
397 | dpif_sflow_del_port__(ds, dsp); | |
72b06300 BP |
398 | } |
399 | } | |
400 | ||
401 | void | |
bae473fe JP |
402 | dpif_sflow_set_options(struct dpif_sflow *ds, |
403 | const struct ofproto_sflow_options *options) | |
72b06300 | 404 | { |
bae473fe | 405 | struct dpif_sflow_port *dsp; |
72b06300 | 406 | bool options_changed; |
72b06300 | 407 | SFLReceiver *receiver; |
72b06300 BP |
408 | SFLAddress agentIP; |
409 | time_t now; | |
72b06300 | 410 | |
81e2083f | 411 | if (sset_is_empty(&options->targets) || !options->sampling_rate) { |
a68813c3 BP |
412 | /* No point in doing any work if there are no targets or nothing to |
413 | * sample. */ | |
bae473fe | 414 | dpif_sflow_clear(ds); |
a68813c3 BP |
415 | return; |
416 | } | |
417 | ||
bae473fe JP |
418 | options_changed = (!ds->options |
419 | || !ofproto_sflow_options_equal(options, ds->options)); | |
72b06300 BP |
420 | |
421 | /* Configure collectors if options have changed or if we're shortchanged in | |
422 | * collectors (which indicates that opening one or more of the configured | |
423 | * collectors failed, so that we should retry). */ | |
424 | if (options_changed | |
bae473fe JP |
425 | || collectors_count(ds->collectors) < sset_count(&options->targets)) { |
426 | collectors_destroy(ds->collectors); | |
02ef592c | 427 | collectors_create(&options->targets, SFL_DEFAULT_COLLECTOR_PORT, |
bae473fe JP |
428 | &ds->collectors); |
429 | if (ds->collectors == NULL) { | |
a68813c3 BP |
430 | VLOG_WARN_RL(&rl, "no collectors could be initialized, " |
431 | "sFlow disabled"); | |
bae473fe | 432 | dpif_sflow_clear(ds); |
72b06300 BP |
433 | return; |
434 | } | |
435 | } | |
436 | ||
733adf2a LG |
437 | /* Choose agent IP address and agent device (if not yet setup) */ |
438 | if (!sflow_choose_agent_address(options->agent_device, | |
439 | &options->targets, | |
440 | options->control_ip, &agentIP)) { | |
441 | dpif_sflow_clear(ds); | |
442 | return; | |
443 | } | |
444 | ||
72b06300 BP |
445 | /* Avoid reconfiguring if options didn't change. */ |
446 | if (!options_changed) { | |
447 | return; | |
448 | } | |
bae473fe JP |
449 | ofproto_sflow_options_destroy(ds->options); |
450 | ds->options = ofproto_sflow_options_clone(options); | |
72b06300 | 451 | |
72b06300 BP |
452 | /* Create agent. */ |
453 | VLOG_INFO("creating sFlow agent %d", options->sub_id); | |
bae473fe JP |
454 | if (ds->sflow_agent) { |
455 | sfl_agent_release(ds->sflow_agent); | |
72b06300 | 456 | } |
bae473fe | 457 | ds->sflow_agent = xcalloc(1, sizeof *ds->sflow_agent); |
c73814a3 | 458 | now = time_wall(); |
bae473fe | 459 | sfl_agent_init(ds->sflow_agent, |
72b06300 BP |
460 | &agentIP, |
461 | options->sub_id, | |
462 | now, /* Boot time. */ | |
463 | now, /* Current time. */ | |
bae473fe | 464 | ds, /* Pointer supplied to callbacks. */ |
72b06300 BP |
465 | sflow_agent_alloc_cb, |
466 | sflow_agent_free_cb, | |
467 | sflow_agent_error_cb, | |
468 | sflow_agent_send_packet_cb); | |
469 | ||
bae473fe | 470 | receiver = sfl_agent_addReceiver(ds->sflow_agent); |
e53df206 | 471 | sfl_receiver_set_sFlowRcvrOwner(receiver, "Open vSwitch sFlow"); |
72b06300 BP |
472 | sfl_receiver_set_sFlowRcvrTimeout(receiver, 0xffffffff); |
473 | ||
72b06300 | 474 | /* Set the sampling_rate down in the datapath. */ |
6ff686f2 | 475 | ds->probability = MAX(1, UINT32_MAX / ds->options->sampling_rate); |
72b06300 | 476 | |
56fd8edf | 477 | /* Add samplers and pollers for the currently known ports. */ |
bae473fe | 478 | HMAP_FOR_EACH (dsp, hmap_node, &ds->ports) { |
392c7182 | 479 | dpif_sflow_add_poller(ds, dsp); |
bae473fe | 480 | dpif_sflow_add_sampler(ds, dsp); |
72b06300 BP |
481 | } |
482 | } | |
483 | ||
6ff686f2 | 484 | int |
bae473fe JP |
485 | dpif_sflow_odp_port_to_ifindex(const struct dpif_sflow *ds, |
486 | uint16_t odp_port) | |
c1e98da1 | 487 | { |
bae473fe JP |
488 | struct dpif_sflow_port *dsp = dpif_sflow_find_port(ds, odp_port); |
489 | return dsp ? SFL_DS_INDEX(dsp->dsi) : 0; | |
c1e98da1 BP |
490 | } |
491 | ||
72b06300 | 492 | void |
6ff686f2 PS |
493 | dpif_sflow_received(struct dpif_sflow *ds, struct ofpbuf *packet, |
494 | const struct flow *flow, | |
1673e0e4 | 495 | const union user_action_cookie *cookie) |
72b06300 BP |
496 | { |
497 | SFL_FLOW_SAMPLE_TYPE fs; | |
498 | SFLFlow_sample_element hdrElem; | |
499 | SFLSampled_header *header; | |
500 | SFLFlow_sample_element switchElem; | |
56fd8edf | 501 | SFLSampler *sampler; |
6ff686f2 PS |
502 | struct dpif_sflow_port *in_dsp; |
503 | struct netdev_stats stats; | |
1673e0e4 | 504 | ovs_be16 vlan_tci; |
6ff686f2 | 505 | int error; |
72b06300 BP |
506 | |
507 | /* Build a flow sample */ | |
508 | memset(&fs, 0, sizeof fs); | |
6ff686f2 PS |
509 | |
510 | in_dsp = dpif_sflow_find_port(ds, ofp_port_to_odp_port(flow->in_port)); | |
511 | if (!in_dsp) { | |
512 | return; | |
513 | } | |
514 | fs.input = SFL_DS_INDEX(in_dsp->dsi); | |
515 | ||
392c7182 | 516 | error = ofproto_port_get_stats(in_dsp->ofport, &stats); |
6ff686f2 PS |
517 | if (error) { |
518 | VLOG_WARN_RL(&rl, "netdev get-stats error %s", strerror(error)); | |
519 | return; | |
520 | } | |
521 | fs.sample_pool = stats.rx_packets; | |
72b06300 | 522 | |
56fd8edf BP |
523 | /* We are going to give it to the sampler that represents this input port. |
524 | * By implementing "ingress-only" sampling like this we ensure that we | |
525 | * never have to offer the same sample to more than one sampler. */ | |
bae473fe | 526 | sampler = sfl_agent_getSamplerByIfIndex(ds->sflow_agent, fs.input); |
56fd8edf BP |
527 | if (!sampler) { |
528 | VLOG_WARN_RL(&rl, "no sampler for input ifIndex (%"PRIu32")", | |
529 | fs.input); | |
530 | return; | |
531 | } | |
532 | ||
72b06300 BP |
533 | /* Sampled header. */ |
534 | memset(&hdrElem, 0, sizeof hdrElem); | |
535 | hdrElem.tag = SFLFLOW_HEADER; | |
536 | header = &hdrElem.flowType.header; | |
537 | header->header_protocol = SFLHEADER_ETHERNET_ISO8023; | |
c62caaa3 NM |
538 | /* The frame_length should include the Ethernet FCS (4 bytes), |
539 | but it has already been stripped, so we need to add 4 here. */ | |
6ff686f2 | 540 | header->frame_length = packet->size + 4; |
c62caaa3 NM |
541 | /* Ethernet FCS stripped off. */ |
542 | header->stripped = 4; | |
6ff686f2 | 543 | header->header_length = MIN(packet->size, |
856081f6 | 544 | sampler->sFlowFsMaximumHeaderSize); |
6ff686f2 | 545 | header->header_bytes = packet->data; |
72b06300 BP |
546 | |
547 | /* Add extended switch element. */ | |
548 | memset(&switchElem, 0, sizeof(switchElem)); | |
549 | switchElem.tag = SFLFLOW_EX_SWITCH; | |
856081f6 BP |
550 | switchElem.flowType.sw.src_vlan = vlan_tci_to_vid(flow->vlan_tci); |
551 | switchElem.flowType.sw.src_priority = vlan_tci_to_pcp(flow->vlan_tci); | |
6ff686f2 PS |
552 | |
553 | /* Retrieve data from user_action_cookie. */ | |
1673e0e4 BP |
554 | vlan_tci = cookie->sflow.vlan_tci; |
555 | switchElem.flowType.sw.dst_vlan = vlan_tci_to_vid(vlan_tci); | |
556 | switchElem.flowType.sw.dst_priority = vlan_tci_to_pcp(vlan_tci); | |
46b47a41 | 557 | |
1673e0e4 | 558 | fs.output = cookie->sflow.output; |
72b06300 BP |
559 | |
560 | /* Submit the flow sample to be encoded into the next datagram. */ | |
561 | SFLADD_ELEMENT(&fs, &hdrElem); | |
562 | SFLADD_ELEMENT(&fs, &switchElem); | |
563 | sfl_sampler_writeFlowSample(sampler, &fs); | |
564 | } | |
565 | ||
72b06300 | 566 | void |
bae473fe | 567 | dpif_sflow_run(struct dpif_sflow *ds) |
72b06300 | 568 | { |
bae473fe | 569 | if (dpif_sflow_is_enabled(ds)) { |
72b06300 | 570 | time_t now = time_now(); |
733adf2a | 571 | route_table_run(); |
bae473fe JP |
572 | if (now >= ds->next_tick) { |
573 | sfl_agent_tick(ds->sflow_agent, time_wall()); | |
574 | ds->next_tick = now + 1; | |
72b06300 BP |
575 | } |
576 | } | |
577 | } | |
578 | ||
579 | void | |
bae473fe | 580 | dpif_sflow_wait(struct dpif_sflow *ds) |
72b06300 | 581 | { |
bae473fe JP |
582 | if (dpif_sflow_is_enabled(ds)) { |
583 | poll_timer_wait_until(ds->next_tick * 1000LL); | |
72b06300 BP |
584 | } |
585 | } |