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96fba48f | 1 | /* |
de281153 | 2 | * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc. |
96fba48f 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> | |
9fe3b9a2 BP |
18 | |
19 | #include "dpif-linux.h" | |
96fba48f | 20 | |
96fba48f BP |
21 | #include <ctype.h> |
22 | #include <errno.h> | |
23 | #include <fcntl.h> | |
24 | #include <inttypes.h> | |
25 | #include <net/if.h> | |
b90fa799 | 26 | #include <linux/types.h> |
aae51f53 | 27 | #include <linux/pkt_sched.h> |
e9e28be3 | 28 | #include <linux/rtnetlink.h> |
96fba48f | 29 | #include <linux/sockios.h> |
8522ba09 | 30 | #include <poll.h> |
96fba48f | 31 | #include <stdlib.h> |
8522ba09 | 32 | #include <strings.h> |
50f80534 | 33 | #include <sys/epoll.h> |
10dcf8de | 34 | #include <sys/stat.h> |
96fba48f BP |
35 | #include <unistd.h> |
36 | ||
773cd538 | 37 | #include "bitmap.h" |
96fba48f | 38 | #include "dpif-provider.h" |
80e5eed9 | 39 | #include "dynamic-string.h" |
eb8b28e7 | 40 | #include "flow.h" |
3abc4a1a | 41 | #include "netdev.h" |
032aa6a3 | 42 | #include "netdev-linux.h" |
c3827f61 | 43 | #include "netdev-vport.h" |
45c8d3a1 | 44 | #include "netlink-notifier.h" |
982b8810 | 45 | #include "netlink-socket.h" |
856081f6 | 46 | #include "netlink.h" |
feebdea2 | 47 | #include "odp-util.h" |
96fba48f | 48 | #include "ofpbuf.h" |
213a13ed | 49 | #include "openvswitch/datapath-compat.h" |
856081f6 | 50 | #include "packets.h" |
96fba48f | 51 | #include "poll-loop.h" |
17411ecf | 52 | #include "random.h" |
54825e09 | 53 | #include "shash.h" |
b3c01ed3 | 54 | #include "sset.h" |
14b4d2f9 | 55 | #include "timeval.h" |
d6569377 | 56 | #include "unaligned.h" |
96fba48f | 57 | #include "util.h" |
96fba48f | 58 | #include "vlog.h" |
5136ce49 | 59 | |
d98e6007 | 60 | VLOG_DEFINE_THIS_MODULE(dpif_linux); |
95b1d73a | 61 | enum { MAX_PORTS = USHRT_MAX }; |
773cd538 | 62 | |
24b019f8 JP |
63 | /* This ethtool flag was introduced in Linux 2.6.24, so it might be |
64 | * missing if we have old headers. */ | |
65 | #define ETH_FLAG_LRO (1 << 15) /* LRO is enabled */ | |
66 | ||
d6569377 | 67 | struct dpif_linux_dp { |
aaff4b55 BP |
68 | /* Generic Netlink header. */ |
69 | uint8_t cmd; | |
d6569377 | 70 | |
df2c07f4 | 71 | /* struct ovs_header. */ |
254f2dc8 | 72 | int dp_ifindex; |
d6569377 BP |
73 | |
74 | /* Attributes. */ | |
df2c07f4 | 75 | const char *name; /* OVS_DP_ATTR_NAME. */ |
a24a6574 | 76 | const uint32_t *upcall_pid; /* OVS_DP_UPCALL_PID. */ |
df2c07f4 | 77 | struct ovs_dp_stats stats; /* OVS_DP_ATTR_STATS. */ |
d6569377 BP |
78 | }; |
79 | ||
80 | static void dpif_linux_dp_init(struct dpif_linux_dp *); | |
aaff4b55 BP |
81 | static int dpif_linux_dp_from_ofpbuf(struct dpif_linux_dp *, |
82 | const struct ofpbuf *); | |
83 | static void dpif_linux_dp_dump_start(struct nl_dump *); | |
d6569377 BP |
84 | static int dpif_linux_dp_transact(const struct dpif_linux_dp *request, |
85 | struct dpif_linux_dp *reply, | |
86 | struct ofpbuf **bufp); | |
87 | static int dpif_linux_dp_get(const struct dpif *, struct dpif_linux_dp *reply, | |
88 | struct ofpbuf **bufp); | |
89 | ||
90 | struct dpif_linux_flow { | |
37a1300c BP |
91 | /* Generic Netlink header. */ |
92 | uint8_t cmd; | |
d6569377 | 93 | |
df2c07f4 | 94 | /* struct ovs_header. */ |
d6569377 | 95 | unsigned int nlmsg_flags; |
254f2dc8 | 96 | int dp_ifindex; |
d6569377 BP |
97 | |
98 | /* Attributes. | |
99 | * | |
0e70cdcb BP |
100 | * The 'stats' member points to 64-bit data that might only be aligned on |
101 | * 32-bit boundaries, so get_unaligned_u64() should be used to access its | |
102 | * values. | |
d2a23af2 | 103 | * |
df2c07f4 | 104 | * If 'actions' is nonnull then OVS_FLOW_ATTR_ACTIONS will be included in |
d2a23af2 | 105 | * the Netlink version of the command, even if actions_len is zero. */ |
df2c07f4 | 106 | const struct nlattr *key; /* OVS_FLOW_ATTR_KEY. */ |
d6569377 | 107 | size_t key_len; |
e6cc0bab AZ |
108 | const struct nlattr *mask; /* OVS_FLOW_ATTR_MASK. */ |
109 | size_t mask_len; | |
df2c07f4 | 110 | const struct nlattr *actions; /* OVS_FLOW_ATTR_ACTIONS. */ |
d6569377 | 111 | size_t actions_len; |
df2c07f4 JP |
112 | const struct ovs_flow_stats *stats; /* OVS_FLOW_ATTR_STATS. */ |
113 | const uint8_t *tcp_flags; /* OVS_FLOW_ATTR_TCP_FLAGS. */ | |
0e70cdcb | 114 | const ovs_32aligned_u64 *used; /* OVS_FLOW_ATTR_USED. */ |
df2c07f4 | 115 | bool clear; /* OVS_FLOW_ATTR_CLEAR. */ |
d6569377 BP |
116 | }; |
117 | ||
118 | static void dpif_linux_flow_init(struct dpif_linux_flow *); | |
37a1300c BP |
119 | static int dpif_linux_flow_from_ofpbuf(struct dpif_linux_flow *, |
120 | const struct ofpbuf *); | |
121 | static void dpif_linux_flow_to_ofpbuf(const struct dpif_linux_flow *, | |
122 | struct ofpbuf *); | |
30b44744 | 123 | static int dpif_linux_flow_transact(struct dpif_linux_flow *request, |
d6569377 BP |
124 | struct dpif_linux_flow *reply, |
125 | struct ofpbuf **bufp); | |
126 | static void dpif_linux_flow_get_stats(const struct dpif_linux_flow *, | |
127 | struct dpif_flow_stats *); | |
128 | ||
989fd548 | 129 | /* One of the dpif channels between the kernel and userspace. */ |
fe3d61b3 | 130 | struct dpif_channel { |
14b4d2f9 | 131 | struct nl_sock *sock; /* Netlink socket. */ |
14b4d2f9 | 132 | long long int last_poll; /* Last time this channel was polled. */ |
fe3d61b3 BP |
133 | }; |
134 | ||
14b4d2f9 BP |
135 | static void report_loss(struct dpif *, struct dpif_channel *); |
136 | ||
96fba48f BP |
137 | /* Datapath interface for the openvswitch Linux kernel module. */ |
138 | struct dpif_linux { | |
139 | struct dpif dpif; | |
254f2dc8 | 140 | int dp_ifindex; |
e9e28be3 | 141 | |
b063d9f0 | 142 | /* Upcall messages. */ |
989fd548 JP |
143 | int uc_array_size; /* Size of 'channels' and 'epoll_events'. */ |
144 | struct dpif_channel *channels; | |
145 | struct epoll_event *epoll_events; | |
fe3d61b3 | 146 | int epoll_fd; /* epoll fd that includes channel socks. */ |
989fd548 JP |
147 | int n_events; /* Num events returned by epoll_wait(). */ |
148 | int event_offset; /* Offset into 'epoll_events'. */ | |
982b8810 | 149 | |
e9e28be3 | 150 | /* Change notification. */ |
b3c01ed3 | 151 | struct sset changed_ports; /* Ports that have changed. */ |
2ee6545f | 152 | struct nln_notifier *port_notifier; |
8b61709d | 153 | bool change_error; |
96fba48f BP |
154 | }; |
155 | ||
156 | static struct vlog_rate_limit error_rl = VLOG_RATE_LIMIT_INIT(9999, 5); | |
157 | ||
df2c07f4 JP |
158 | /* Generic Netlink family numbers for OVS. */ |
159 | static int ovs_datapath_family; | |
160 | static int ovs_vport_family; | |
161 | static int ovs_flow_family; | |
162 | static int ovs_packet_family; | |
982b8810 BP |
163 | |
164 | /* Generic Netlink socket. */ | |
c7178a0b | 165 | static struct nln *nln = NULL; |
982b8810 BP |
166 | |
167 | static int dpif_linux_init(void); | |
8f4a4df5 | 168 | static void open_dpif(const struct dpif_linux_dp *, struct dpif **); |
c7178a0b EJ |
169 | static bool dpif_linux_nln_parse(struct ofpbuf *, void *); |
170 | static void dpif_linux_port_changed(const void *vport, void *dpif); | |
4e022ec0 AW |
171 | static uint32_t dpif_linux_port_get_pid(const struct dpif *, |
172 | odp_port_t port_no); | |
96fba48f | 173 | |
f0fef760 BP |
174 | static void dpif_linux_vport_to_ofpbuf(const struct dpif_linux_vport *, |
175 | struct ofpbuf *); | |
176 | static int dpif_linux_vport_from_ofpbuf(struct dpif_linux_vport *, | |
177 | const struct ofpbuf *); | |
178 | ||
96fba48f BP |
179 | static struct dpif_linux * |
180 | dpif_linux_cast(const struct dpif *dpif) | |
181 | { | |
182 | dpif_assert_class(dpif, &dpif_linux_class); | |
183 | return CONTAINER_OF(dpif, struct dpif_linux, dpif); | |
184 | } | |
185 | ||
d3d22744 | 186 | static int |
d0c23a1a | 187 | dpif_linux_enumerate(struct sset *all_dps) |
d3d22744 | 188 | { |
aaff4b55 BP |
189 | struct nl_dump dump; |
190 | struct ofpbuf msg; | |
aaff4b55 | 191 | int error; |
982b8810 | 192 | |
aaff4b55 BP |
193 | error = dpif_linux_init(); |
194 | if (error) { | |
195 | return error; | |
982b8810 | 196 | } |
d3d22744 | 197 | |
aaff4b55 BP |
198 | dpif_linux_dp_dump_start(&dump); |
199 | while (nl_dump_next(&dump, &msg)) { | |
200 | struct dpif_linux_dp dp; | |
d6569377 | 201 | |
aaff4b55 | 202 | if (!dpif_linux_dp_from_ofpbuf(&dp, &msg)) { |
d0c23a1a | 203 | sset_add(all_dps, dp.name); |
d3d22744 BP |
204 | } |
205 | } | |
aaff4b55 | 206 | return nl_dump_done(&dump); |
d3d22744 BP |
207 | } |
208 | ||
96fba48f | 209 | static int |
4a387741 BP |
210 | dpif_linux_open(const struct dpif_class *class OVS_UNUSED, const char *name, |
211 | bool create, struct dpif **dpifp) | |
96fba48f | 212 | { |
982b8810 | 213 | struct dpif_linux_dp dp_request, dp; |
c19e6535 | 214 | struct ofpbuf *buf; |
ea36840f | 215 | uint32_t upcall_pid; |
c19e6535 | 216 | int error; |
96fba48f | 217 | |
982b8810 BP |
218 | error = dpif_linux_init(); |
219 | if (error) { | |
220 | return error; | |
221 | } | |
222 | ||
982b8810 BP |
223 | /* Create or look up datapath. */ |
224 | dpif_linux_dp_init(&dp_request); | |
ea36840f BP |
225 | if (create) { |
226 | dp_request.cmd = OVS_DP_CMD_NEW; | |
227 | upcall_pid = 0; | |
228 | dp_request.upcall_pid = &upcall_pid; | |
229 | } else { | |
230 | dp_request.cmd = OVS_DP_CMD_GET; | |
231 | } | |
254f2dc8 | 232 | dp_request.name = name; |
982b8810 BP |
233 | error = dpif_linux_dp_transact(&dp_request, &dp, &buf); |
234 | if (error) { | |
235 | return error; | |
c19e6535 | 236 | } |
254f2dc8 | 237 | |
8f4a4df5 EJ |
238 | open_dpif(&dp, dpifp); |
239 | ofpbuf_delete(buf); | |
240 | return 0; | |
c19e6535 BP |
241 | } |
242 | ||
8f4a4df5 | 243 | static void |
254f2dc8 | 244 | open_dpif(const struct dpif_linux_dp *dp, struct dpif **dpifp) |
c19e6535 | 245 | { |
c19e6535 | 246 | struct dpif_linux *dpif; |
c19e6535 | 247 | |
17411ecf | 248 | dpif = xzalloc(sizeof *dpif); |
2ee6545f EJ |
249 | dpif->port_notifier = nln_notifier_create(nln, dpif_linux_port_changed, |
250 | dpif); | |
50f80534 | 251 | dpif->epoll_fd = -1; |
c19e6535 | 252 | |
254f2dc8 BP |
253 | dpif_init(&dpif->dpif, &dpif_linux_class, dp->name, |
254 | dp->dp_ifindex, dp->dp_ifindex); | |
c19e6535 | 255 | |
254f2dc8 | 256 | dpif->dp_ifindex = dp->dp_ifindex; |
b3c01ed3 | 257 | sset_init(&dpif->changed_ports); |
c19e6535 | 258 | *dpifp = &dpif->dpif; |
96fba48f BP |
259 | } |
260 | ||
17411ecf | 261 | static void |
fe3d61b3 | 262 | destroy_channels(struct dpif_linux *dpif) |
17411ecf | 263 | { |
4e022ec0 | 264 | unsigned int i; |
17411ecf | 265 | |
989fd548 JP |
266 | if (dpif->epoll_fd < 0) { |
267 | return; | |
50f80534 | 268 | } |
989fd548 JP |
269 | |
270 | for (i = 0; i < dpif->uc_array_size; i++ ) { | |
271 | struct dpif_linux_vport vport_request; | |
272 | struct dpif_channel *ch = &dpif->channels[i]; | |
273 | uint32_t upcall_pid = 0; | |
274 | ||
275 | if (!ch->sock) { | |
276 | continue; | |
277 | } | |
278 | ||
279 | /* Turn off upcalls. */ | |
280 | dpif_linux_vport_init(&vport_request); | |
281 | vport_request.cmd = OVS_VPORT_CMD_SET; | |
282 | vport_request.dp_ifindex = dpif->dp_ifindex; | |
4e022ec0 | 283 | vport_request.port_no = u32_to_odp(i); |
989fd548 JP |
284 | vport_request.upcall_pid = &upcall_pid; |
285 | dpif_linux_vport_transact(&vport_request, NULL, NULL); | |
286 | ||
fe3d61b3 | 287 | nl_sock_destroy(ch->sock); |
17411ecf | 288 | } |
989fd548 JP |
289 | |
290 | free(dpif->channels); | |
291 | dpif->channels = NULL; | |
292 | dpif->uc_array_size = 0; | |
293 | ||
294 | free(dpif->epoll_events); | |
295 | dpif->epoll_events = NULL; | |
296 | dpif->n_events = dpif->event_offset = 0; | |
297 | ||
298 | close(dpif->epoll_fd); | |
299 | dpif->epoll_fd = -1; | |
300 | } | |
301 | ||
302 | static int | |
4e022ec0 | 303 | add_channel(struct dpif_linux *dpif, odp_port_t port_no, struct nl_sock *sock) |
989fd548 JP |
304 | { |
305 | struct epoll_event event; | |
4e022ec0 | 306 | uint32_t port_idx = odp_to_u32(port_no); |
989fd548 JP |
307 | |
308 | if (dpif->epoll_fd < 0) { | |
309 | return 0; | |
310 | } | |
311 | ||
312 | /* We assume that the datapath densely chooses port numbers, which | |
313 | * can therefore be used as an index into an array of channels. */ | |
4e022ec0 AW |
314 | if (port_idx >= dpif->uc_array_size) { |
315 | uint32_t new_size = port_idx + 1; | |
316 | uint32_t i; | |
989fd548 | 317 | |
12d76859 | 318 | if (new_size > MAX_PORTS) { |
989fd548 JP |
319 | VLOG_WARN_RL(&error_rl, "%s: datapath port %"PRIu32" too big", |
320 | dpif_name(&dpif->dpif), port_no); | |
321 | return EFBIG; | |
322 | } | |
323 | ||
324 | dpif->channels = xrealloc(dpif->channels, | |
325 | new_size * sizeof *dpif->channels); | |
326 | for (i = dpif->uc_array_size; i < new_size; i++) { | |
327 | dpif->channels[i].sock = NULL; | |
328 | } | |
329 | ||
330 | dpif->epoll_events = xrealloc(dpif->epoll_events, | |
331 | new_size * sizeof *dpif->epoll_events); | |
332 | dpif->uc_array_size = new_size; | |
333 | } | |
334 | ||
335 | memset(&event, 0, sizeof event); | |
336 | event.events = EPOLLIN; | |
4e022ec0 | 337 | event.data.u32 = port_idx; |
989fd548 JP |
338 | if (epoll_ctl(dpif->epoll_fd, EPOLL_CTL_ADD, nl_sock_fd(sock), |
339 | &event) < 0) { | |
340 | return errno; | |
341 | } | |
342 | ||
4e022ec0 AW |
343 | nl_sock_destroy(dpif->channels[port_idx].sock); |
344 | dpif->channels[port_idx].sock = sock; | |
345 | dpif->channels[port_idx].last_poll = LLONG_MIN; | |
989fd548 JP |
346 | |
347 | return 0; | |
348 | } | |
349 | ||
350 | static void | |
4e022ec0 | 351 | del_channel(struct dpif_linux *dpif, odp_port_t port_no) |
989fd548 JP |
352 | { |
353 | struct dpif_channel *ch; | |
4e022ec0 | 354 | uint32_t port_idx = odp_to_u32(port_no); |
989fd548 | 355 | |
4e022ec0 | 356 | if (dpif->epoll_fd < 0 || port_idx >= dpif->uc_array_size) { |
989fd548 JP |
357 | return; |
358 | } | |
359 | ||
4e022ec0 | 360 | ch = &dpif->channels[port_idx]; |
989fd548 JP |
361 | if (!ch->sock) { |
362 | return; | |
363 | } | |
364 | ||
365 | epoll_ctl(dpif->epoll_fd, EPOLL_CTL_DEL, nl_sock_fd(ch->sock), NULL); | |
fa717215 | 366 | dpif->event_offset = dpif->n_events = 0; |
989fd548 JP |
367 | |
368 | nl_sock_destroy(ch->sock); | |
369 | ch->sock = NULL; | |
17411ecf JG |
370 | } |
371 | ||
96fba48f BP |
372 | static void |
373 | dpif_linux_close(struct dpif *dpif_) | |
374 | { | |
375 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
c7178a0b | 376 | |
2ee6545f | 377 | nln_notifier_destroy(dpif->port_notifier); |
fe3d61b3 | 378 | destroy_channels(dpif); |
b3c01ed3 | 379 | sset_destroy(&dpif->changed_ports); |
96fba48f BP |
380 | free(dpif); |
381 | } | |
382 | ||
383 | static int | |
7dab847a | 384 | dpif_linux_destroy(struct dpif *dpif_) |
96fba48f | 385 | { |
d6569377 BP |
386 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
387 | struct dpif_linux_dp dp; | |
388 | ||
389 | dpif_linux_dp_init(&dp); | |
df2c07f4 | 390 | dp.cmd = OVS_DP_CMD_DEL; |
254f2dc8 | 391 | dp.dp_ifindex = dpif->dp_ifindex; |
d6569377 | 392 | return dpif_linux_dp_transact(&dp, NULL, NULL); |
96fba48f BP |
393 | } |
394 | ||
d8abf60c | 395 | static void |
989fd548 | 396 | dpif_linux_run(struct dpif *dpif_ OVS_UNUSED) |
d8abf60c | 397 | { |
c7178a0b | 398 | if (nln) { |
18a23781 | 399 | nln_run(nln); |
c7178a0b | 400 | } |
d8abf60c EJ |
401 | } |
402 | ||
403 | static void | |
404 | dpif_linux_wait(struct dpif *dpif OVS_UNUSED) | |
405 | { | |
c7178a0b | 406 | if (nln) { |
18a23781 | 407 | nln_wait(nln); |
c7178a0b | 408 | } |
d8abf60c EJ |
409 | } |
410 | ||
96fba48f | 411 | static int |
a8d9304d | 412 | dpif_linux_get_stats(const struct dpif *dpif_, struct dpif_dp_stats *stats) |
96fba48f | 413 | { |
d6569377 BP |
414 | struct dpif_linux_dp dp; |
415 | struct ofpbuf *buf; | |
416 | int error; | |
417 | ||
418 | error = dpif_linux_dp_get(dpif_, &dp, &buf); | |
419 | if (!error) { | |
a8d9304d BP |
420 | stats->n_hit = dp.stats.n_hit; |
421 | stats->n_missed = dp.stats.n_missed; | |
422 | stats->n_lost = dp.stats.n_lost; | |
423 | stats->n_flows = dp.stats.n_flows; | |
d6569377 BP |
424 | ofpbuf_delete(buf); |
425 | } | |
426 | return error; | |
96fba48f BP |
427 | } |
428 | ||
b9ad7294 EJ |
429 | static const char * |
430 | get_vport_type(const struct dpif_linux_vport *vport) | |
431 | { | |
432 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20); | |
433 | ||
434 | switch (vport->type) { | |
435 | case OVS_VPORT_TYPE_NETDEV: | |
436 | return "system"; | |
437 | ||
438 | case OVS_VPORT_TYPE_INTERNAL: | |
439 | return "internal"; | |
440 | ||
441 | case OVS_VPORT_TYPE_GRE: | |
442 | return "gre"; | |
443 | ||
444 | case OVS_VPORT_TYPE_GRE64: | |
445 | return "gre64"; | |
446 | ||
b9ad7294 EJ |
447 | case OVS_VPORT_TYPE_VXLAN: |
448 | return "vxlan"; | |
449 | ||
a6ae068b LJ |
450 | case OVS_VPORT_TYPE_LISP: |
451 | return "lisp"; | |
452 | ||
b9ad7294 EJ |
453 | case OVS_VPORT_TYPE_UNSPEC: |
454 | case __OVS_VPORT_TYPE_MAX: | |
455 | break; | |
456 | } | |
457 | ||
458 | VLOG_WARN_RL(&rl, "dp%d: port `%s' has unsupported type %u", | |
459 | vport->dp_ifindex, vport->name, (unsigned int) vport->type); | |
460 | return "unknown"; | |
461 | } | |
462 | ||
c060c4cf EJ |
463 | static enum ovs_vport_type |
464 | netdev_to_ovs_vport_type(const struct netdev *netdev) | |
465 | { | |
466 | const char *type = netdev_get_type(netdev); | |
467 | ||
468 | if (!strcmp(type, "tap") || !strcmp(type, "system")) { | |
469 | return OVS_VPORT_TYPE_NETDEV; | |
470 | } else if (!strcmp(type, "internal")) { | |
471 | return OVS_VPORT_TYPE_INTERNAL; | |
472 | } else if (strstr(type, "gre64")) { | |
473 | return OVS_VPORT_TYPE_GRE64; | |
474 | } else if (strstr(type, "gre")) { | |
475 | return OVS_VPORT_TYPE_GRE; | |
c060c4cf EJ |
476 | } else if (!strcmp(type, "vxlan")) { |
477 | return OVS_VPORT_TYPE_VXLAN; | |
a6ae068b LJ |
478 | } else if (!strcmp(type, "lisp")) { |
479 | return OVS_VPORT_TYPE_LISP; | |
c060c4cf EJ |
480 | } else { |
481 | return OVS_VPORT_TYPE_UNSPEC; | |
482 | } | |
483 | } | |
484 | ||
96fba48f | 485 | static int |
c19e6535 | 486 | dpif_linux_port_add(struct dpif *dpif_, struct netdev *netdev, |
4e022ec0 | 487 | odp_port_t *port_nop) |
96fba48f | 488 | { |
c19e6535 | 489 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
26508d9a | 490 | const struct netdev_tunnel_config *tnl_cfg; |
3aa30359 BP |
491 | char namebuf[NETDEV_VPORT_NAME_BUFSIZE]; |
492 | const char *name = netdev_vport_get_dpif_port(netdev, | |
493 | namebuf, sizeof namebuf); | |
c3827f61 | 494 | const char *type = netdev_get_type(netdev); |
c19e6535 | 495 | struct dpif_linux_vport request, reply; |
989fd548 | 496 | struct nl_sock *sock = NULL; |
78a2d59c | 497 | uint32_t upcall_pid; |
c19e6535 | 498 | struct ofpbuf *buf; |
26508d9a KM |
499 | uint64_t options_stub[64 / 8]; |
500 | struct ofpbuf options; | |
78a2d59c | 501 | int error; |
96fba48f | 502 | |
989fd548 JP |
503 | if (dpif->epoll_fd >= 0) { |
504 | error = nl_sock_create(NETLINK_GENERIC, &sock); | |
505 | if (error) { | |
506 | return error; | |
507 | } | |
508 | } | |
509 | ||
c19e6535 | 510 | dpif_linux_vport_init(&request); |
df2c07f4 | 511 | request.cmd = OVS_VPORT_CMD_NEW; |
254f2dc8 | 512 | request.dp_ifindex = dpif->dp_ifindex; |
c060c4cf | 513 | request.type = netdev_to_ovs_vport_type(netdev); |
df2c07f4 | 514 | if (request.type == OVS_VPORT_TYPE_UNSPEC) { |
c283069c BP |
515 | VLOG_WARN_RL(&error_rl, "%s: cannot create port `%s' because it has " |
516 | "unsupported type `%s'", | |
c19e6535 | 517 | dpif_name(dpif_), name, type); |
989fd548 | 518 | nl_sock_destroy(sock); |
c283069c BP |
519 | return EINVAL; |
520 | } | |
c19e6535 | 521 | request.name = name; |
c3827f61 | 522 | |
24b019f8 JP |
523 | if (request.type == OVS_VPORT_TYPE_NETDEV) { |
524 | netdev_linux_ethtool_set_flag(netdev, ETH_FLAG_LRO, "LRO", false); | |
525 | } | |
526 | ||
26508d9a KM |
527 | tnl_cfg = netdev_get_tunnel_config(netdev); |
528 | if (tnl_cfg && tnl_cfg->dst_port != 0) { | |
529 | ofpbuf_use_stack(&options, options_stub, sizeof options_stub); | |
530 | nl_msg_put_u16(&options, OVS_TUNNEL_ATTR_DST_PORT, | |
7e2d8aea | 531 | ntohs(tnl_cfg->dst_port)); |
26508d9a KM |
532 | request.options = options.data; |
533 | request.options_len = options.size; | |
534 | } | |
535 | ||
78a2d59c | 536 | request.port_no = *port_nop; |
989fd548 | 537 | upcall_pid = sock ? nl_sock_pid(sock) : 0; |
78a2d59c | 538 | request.upcall_pid = &upcall_pid; |
95b1d73a | 539 | |
78a2d59c | 540 | error = dpif_linux_vport_transact(&request, &reply, &buf); |
78a2d59c JP |
541 | if (!error) { |
542 | *port_nop = reply.port_no; | |
543 | VLOG_DBG("%s: assigning port %"PRIu32" to netlink pid %"PRIu32, | |
f205882a | 544 | dpif_name(dpif_), reply.port_no, upcall_pid); |
2510ba7c | 545 | } else { |
4e022ec0 | 546 | if (error == EBUSY && *port_nop != ODPP_NONE) { |
2510ba7c JP |
547 | VLOG_INFO("%s: requested port %"PRIu32" is in use", |
548 | dpif_name(dpif_), *port_nop); | |
549 | } | |
989fd548 JP |
550 | nl_sock_destroy(sock); |
551 | ofpbuf_delete(buf); | |
552 | return error; | |
78a2d59c | 553 | } |
78a2d59c | 554 | ofpbuf_delete(buf); |
c3827f61 | 555 | |
989fd548 JP |
556 | if (sock) { |
557 | error = add_channel(dpif, *port_nop, sock); | |
558 | if (error) { | |
559 | VLOG_INFO("%s: could not add channel for port %s", | |
560 | dpif_name(dpif_), name); | |
561 | ||
562 | /* Delete the port. */ | |
563 | dpif_linux_vport_init(&request); | |
564 | request.cmd = OVS_VPORT_CMD_DEL; | |
565 | request.dp_ifindex = dpif->dp_ifindex; | |
566 | request.port_no = *port_nop; | |
567 | dpif_linux_vport_transact(&request, NULL, NULL); | |
568 | ||
569 | nl_sock_destroy(sock); | |
570 | return error; | |
571 | } | |
572 | } | |
573 | ||
574 | return 0; | |
96fba48f BP |
575 | } |
576 | ||
577 | static int | |
4e022ec0 | 578 | dpif_linux_port_del(struct dpif *dpif_, odp_port_t port_no) |
96fba48f | 579 | { |
c19e6535 BP |
580 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
581 | struct dpif_linux_vport vport; | |
773cd538 | 582 | int error; |
c19e6535 BP |
583 | |
584 | dpif_linux_vport_init(&vport); | |
df2c07f4 | 585 | vport.cmd = OVS_VPORT_CMD_DEL; |
254f2dc8 | 586 | vport.dp_ifindex = dpif->dp_ifindex; |
c19e6535 | 587 | vport.port_no = port_no; |
773cd538 EJ |
588 | error = dpif_linux_vport_transact(&vport, NULL, NULL); |
589 | ||
989fd548 JP |
590 | del_channel(dpif, port_no); |
591 | ||
773cd538 | 592 | return error; |
c3827f61 | 593 | } |
3abc4a1a | 594 | |
c3827f61 | 595 | static int |
4e022ec0 | 596 | dpif_linux_port_query__(const struct dpif *dpif, odp_port_t port_no, |
4c738a8d | 597 | const char *port_name, struct dpif_port *dpif_port) |
c3827f61 | 598 | { |
c19e6535 BP |
599 | struct dpif_linux_vport request; |
600 | struct dpif_linux_vport reply; | |
601 | struct ofpbuf *buf; | |
4c738a8d BP |
602 | int error; |
603 | ||
c19e6535 | 604 | dpif_linux_vport_init(&request); |
df2c07f4 | 605 | request.cmd = OVS_VPORT_CMD_GET; |
254f2dc8 | 606 | request.dp_ifindex = dpif_linux_cast(dpif)->dp_ifindex; |
c19e6535 BP |
607 | request.port_no = port_no; |
608 | request.name = port_name; | |
4c738a8d | 609 | |
c19e6535 BP |
610 | error = dpif_linux_vport_transact(&request, &reply, &buf); |
611 | if (!error) { | |
33db1592 BP |
612 | if (reply.dp_ifindex != request.dp_ifindex) { |
613 | /* A query by name reported that 'port_name' is in some datapath | |
614 | * other than 'dpif', but the caller wants to know about 'dpif'. */ | |
615 | error = ENODEV; | |
4afba28d | 616 | } else if (dpif_port) { |
33db1592 | 617 | dpif_port->name = xstrdup(reply.name); |
b9ad7294 | 618 | dpif_port->type = xstrdup(get_vport_type(&reply)); |
33db1592 BP |
619 | dpif_port->port_no = reply.port_no; |
620 | } | |
c19e6535 | 621 | ofpbuf_delete(buf); |
3abc4a1a | 622 | } |
c19e6535 | 623 | return error; |
96fba48f BP |
624 | } |
625 | ||
626 | static int | |
4e022ec0 | 627 | dpif_linux_port_query_by_number(const struct dpif *dpif, odp_port_t port_no, |
4c738a8d | 628 | struct dpif_port *dpif_port) |
96fba48f | 629 | { |
c19e6535 | 630 | return dpif_linux_port_query__(dpif, port_no, NULL, dpif_port); |
96fba48f BP |
631 | } |
632 | ||
633 | static int | |
4c738a8d BP |
634 | dpif_linux_port_query_by_name(const struct dpif *dpif, const char *devname, |
635 | struct dpif_port *dpif_port) | |
96fba48f | 636 | { |
4c738a8d | 637 | return dpif_linux_port_query__(dpif, 0, devname, dpif_port); |
96fba48f BP |
638 | } |
639 | ||
4e022ec0 | 640 | static odp_port_t |
996c1b3d BP |
641 | dpif_linux_get_max_ports(const struct dpif *dpif OVS_UNUSED) |
642 | { | |
4e022ec0 | 643 | return u32_to_odp(MAX_PORTS); |
996c1b3d BP |
644 | } |
645 | ||
98403001 | 646 | static uint32_t |
4e022ec0 | 647 | dpif_linux_port_get_pid(const struct dpif *dpif_, odp_port_t port_no) |
98403001 | 648 | { |
550f0db4 | 649 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
4e022ec0 | 650 | uint32_t port_idx = odp_to_u32(port_no); |
98403001 | 651 | |
a12b3ead | 652 | if (dpif->epoll_fd < 0) { |
98403001 BP |
653 | return 0; |
654 | } else { | |
4e022ec0 | 655 | /* The ODPP_NONE "reserved" port number uses the "ovs-system"'s |
989fd548 | 656 | * channel, since it is not heavily loaded. */ |
4e022ec0 | 657 | uint32_t idx = port_idx >= dpif->uc_array_size ? 0 : port_idx; |
fe3d61b3 | 658 | return nl_sock_pid(dpif->channels[idx].sock); |
98403001 BP |
659 | } |
660 | } | |
661 | ||
96fba48f BP |
662 | static int |
663 | dpif_linux_flow_flush(struct dpif *dpif_) | |
664 | { | |
550f0db4 | 665 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
37a1300c BP |
666 | struct dpif_linux_flow flow; |
667 | ||
668 | dpif_linux_flow_init(&flow); | |
df2c07f4 | 669 | flow.cmd = OVS_FLOW_CMD_DEL; |
254f2dc8 | 670 | flow.dp_ifindex = dpif->dp_ifindex; |
37a1300c | 671 | return dpif_linux_flow_transact(&flow, NULL, NULL); |
96fba48f BP |
672 | } |
673 | ||
c19e6535 | 674 | struct dpif_linux_port_state { |
f0fef760 | 675 | struct nl_dump dump; |
c19e6535 BP |
676 | }; |
677 | ||
96fba48f | 678 | static int |
f0fef760 | 679 | dpif_linux_port_dump_start(const struct dpif *dpif_, void **statep) |
96fba48f | 680 | { |
550f0db4 | 681 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
f0fef760 BP |
682 | struct dpif_linux_port_state *state; |
683 | struct dpif_linux_vport request; | |
684 | struct ofpbuf *buf; | |
685 | ||
686 | *statep = state = xmalloc(sizeof *state); | |
687 | ||
688 | dpif_linux_vport_init(&request); | |
df2c07f4 | 689 | request.cmd = OVS_DP_CMD_GET; |
254f2dc8 | 690 | request.dp_ifindex = dpif->dp_ifindex; |
f0fef760 BP |
691 | |
692 | buf = ofpbuf_new(1024); | |
693 | dpif_linux_vport_to_ofpbuf(&request, buf); | |
a88b4e04 | 694 | nl_dump_start(&state->dump, NETLINK_GENERIC, buf); |
f0fef760 BP |
695 | ofpbuf_delete(buf); |
696 | ||
b0ec0f27 BP |
697 | return 0; |
698 | } | |
699 | ||
700 | static int | |
f0fef760 | 701 | dpif_linux_port_dump_next(const struct dpif *dpif OVS_UNUSED, void *state_, |
4c738a8d | 702 | struct dpif_port *dpif_port) |
b0ec0f27 | 703 | { |
c19e6535 | 704 | struct dpif_linux_port_state *state = state_; |
f0fef760 BP |
705 | struct dpif_linux_vport vport; |
706 | struct ofpbuf buf; | |
96fba48f BP |
707 | int error; |
708 | ||
f0fef760 BP |
709 | if (!nl_dump_next(&state->dump, &buf)) { |
710 | return EOF; | |
711 | } | |
c19e6535 | 712 | |
f0fef760 | 713 | error = dpif_linux_vport_from_ofpbuf(&vport, &buf); |
c3827f61 | 714 | if (error) { |
f0fef760 | 715 | return error; |
c3827f61 | 716 | } |
f0fef760 | 717 | |
ebc56baa | 718 | dpif_port->name = CONST_CAST(char *, vport.name); |
b9ad7294 | 719 | dpif_port->type = CONST_CAST(char *, get_vport_type(&vport)); |
f0fef760 BP |
720 | dpif_port->port_no = vport.port_no; |
721 | return 0; | |
b0ec0f27 BP |
722 | } |
723 | ||
724 | static int | |
95b1d73a | 725 | dpif_linux_port_dump_done(const struct dpif *dpif_ OVS_UNUSED, void *state_) |
b0ec0f27 | 726 | { |
c19e6535 | 727 | struct dpif_linux_port_state *state = state_; |
f0fef760 | 728 | int error = nl_dump_done(&state->dump); |
8522b383 | 729 | |
b0ec0f27 | 730 | free(state); |
f0fef760 | 731 | return error; |
96fba48f BP |
732 | } |
733 | ||
e9e28be3 BP |
734 | static int |
735 | dpif_linux_port_poll(const struct dpif *dpif_, char **devnamep) | |
736 | { | |
737 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
e9e28be3 | 738 | |
8b61709d BP |
739 | if (dpif->change_error) { |
740 | dpif->change_error = false; | |
b3c01ed3 | 741 | sset_clear(&dpif->changed_ports); |
8b61709d | 742 | return ENOBUFS; |
b3c01ed3 BP |
743 | } else if (!sset_is_empty(&dpif->changed_ports)) { |
744 | *devnamep = sset_pop(&dpif->changed_ports); | |
8b61709d | 745 | return 0; |
e9e28be3 | 746 | } else { |
8b61709d | 747 | return EAGAIN; |
e9e28be3 | 748 | } |
e9e28be3 BP |
749 | } |
750 | ||
751 | static void | |
752 | dpif_linux_port_poll_wait(const struct dpif *dpif_) | |
753 | { | |
550f0db4 | 754 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
b3c01ed3 | 755 | if (!sset_is_empty(&dpif->changed_ports) || dpif->change_error) { |
e9e28be3 | 756 | poll_immediate_wake(); |
e9e28be3 BP |
757 | } |
758 | } | |
759 | ||
96fba48f | 760 | static int |
30053024 BP |
761 | dpif_linux_flow_get__(const struct dpif *dpif_, |
762 | const struct nlattr *key, size_t key_len, | |
763 | struct dpif_linux_flow *reply, struct ofpbuf **bufp) | |
96fba48f | 764 | { |
550f0db4 | 765 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
30053024 | 766 | struct dpif_linux_flow request; |
feebdea2 | 767 | |
d6569377 | 768 | dpif_linux_flow_init(&request); |
df2c07f4 | 769 | request.cmd = OVS_FLOW_CMD_GET; |
254f2dc8 | 770 | request.dp_ifindex = dpif->dp_ifindex; |
d6569377 BP |
771 | request.key = key; |
772 | request.key_len = key_len; | |
30053024 BP |
773 | return dpif_linux_flow_transact(&request, reply, bufp); |
774 | } | |
775 | ||
776 | static int | |
777 | dpif_linux_flow_get(const struct dpif *dpif_, | |
778 | const struct nlattr *key, size_t key_len, | |
779 | struct ofpbuf **actionsp, struct dpif_flow_stats *stats) | |
780 | { | |
781 | struct dpif_linux_flow reply; | |
782 | struct ofpbuf *buf; | |
783 | int error; | |
784 | ||
785 | error = dpif_linux_flow_get__(dpif_, key, key_len, &reply, &buf); | |
feebdea2 BP |
786 | if (!error) { |
787 | if (stats) { | |
d6569377 | 788 | dpif_linux_flow_get_stats(&reply, stats); |
feebdea2 | 789 | } |
d6569377 | 790 | if (actionsp) { |
ebc56baa | 791 | buf->data = CONST_CAST(struct nlattr *, reply.actions); |
d6569377 BP |
792 | buf->size = reply.actions_len; |
793 | *actionsp = buf; | |
794 | } else { | |
795 | ofpbuf_delete(buf); | |
feebdea2 BP |
796 | } |
797 | } | |
798 | return error; | |
96fba48f BP |
799 | } |
800 | ||
6bc60024 | 801 | static void |
89625d1e | 802 | dpif_linux_init_flow_put(struct dpif *dpif_, const struct dpif_flow_put *put, |
6bc60024 BP |
803 | struct dpif_linux_flow *request) |
804 | { | |
d64e176c | 805 | static const struct nlattr dummy_action; |
6bc60024 | 806 | |
550f0db4 | 807 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
6bc60024 BP |
808 | |
809 | dpif_linux_flow_init(request); | |
89625d1e | 810 | request->cmd = (put->flags & DPIF_FP_CREATE |
6bc60024 BP |
811 | ? OVS_FLOW_CMD_NEW : OVS_FLOW_CMD_SET); |
812 | request->dp_ifindex = dpif->dp_ifindex; | |
89625d1e BP |
813 | request->key = put->key; |
814 | request->key_len = put->key_len; | |
e6cc0bab AZ |
815 | request->mask = put->mask; |
816 | request->mask_len = put->mask_len; | |
6bc60024 | 817 | /* Ensure that OVS_FLOW_ATTR_ACTIONS will always be included. */ |
d64e176c BP |
818 | request->actions = (put->actions |
819 | ? put->actions | |
820 | : CONST_CAST(struct nlattr *, &dummy_action)); | |
89625d1e BP |
821 | request->actions_len = put->actions_len; |
822 | if (put->flags & DPIF_FP_ZERO_STATS) { | |
6bc60024 BP |
823 | request->clear = true; |
824 | } | |
89625d1e | 825 | request->nlmsg_flags = put->flags & DPIF_FP_MODIFY ? 0 : NLM_F_CREATE; |
6bc60024 BP |
826 | } |
827 | ||
96fba48f | 828 | static int |
89625d1e | 829 | dpif_linux_flow_put(struct dpif *dpif_, const struct dpif_flow_put *put) |
96fba48f | 830 | { |
d6569377 BP |
831 | struct dpif_linux_flow request, reply; |
832 | struct ofpbuf *buf; | |
feebdea2 BP |
833 | int error; |
834 | ||
89625d1e | 835 | dpif_linux_init_flow_put(dpif_, put, &request); |
d6569377 | 836 | error = dpif_linux_flow_transact(&request, |
89625d1e BP |
837 | put->stats ? &reply : NULL, |
838 | put->stats ? &buf : NULL); | |
839 | if (!error && put->stats) { | |
840 | dpif_linux_flow_get_stats(&reply, put->stats); | |
d6569377 | 841 | ofpbuf_delete(buf); |
feebdea2 BP |
842 | } |
843 | return error; | |
96fba48f BP |
844 | } |
845 | ||
b99d3cee BP |
846 | static void |
847 | dpif_linux_init_flow_del(struct dpif *dpif_, const struct dpif_flow_del *del, | |
848 | struct dpif_linux_flow *request) | |
96fba48f | 849 | { |
550f0db4 | 850 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
b99d3cee BP |
851 | |
852 | dpif_linux_flow_init(request); | |
853 | request->cmd = OVS_FLOW_CMD_DEL; | |
854 | request->dp_ifindex = dpif->dp_ifindex; | |
855 | request->key = del->key; | |
856 | request->key_len = del->key_len; | |
857 | } | |
858 | ||
859 | static int | |
860 | dpif_linux_flow_del(struct dpif *dpif_, const struct dpif_flow_del *del) | |
861 | { | |
d6569377 BP |
862 | struct dpif_linux_flow request, reply; |
863 | struct ofpbuf *buf; | |
feebdea2 BP |
864 | int error; |
865 | ||
b99d3cee | 866 | dpif_linux_init_flow_del(dpif_, del, &request); |
d6569377 | 867 | error = dpif_linux_flow_transact(&request, |
b99d3cee BP |
868 | del->stats ? &reply : NULL, |
869 | del->stats ? &buf : NULL); | |
870 | if (!error && del->stats) { | |
871 | dpif_linux_flow_get_stats(&reply, del->stats); | |
d6569377 | 872 | ofpbuf_delete(buf); |
feebdea2 BP |
873 | } |
874 | return error; | |
96fba48f BP |
875 | } |
876 | ||
feebdea2 | 877 | struct dpif_linux_flow_state { |
37a1300c | 878 | struct nl_dump dump; |
d6569377 | 879 | struct dpif_linux_flow flow; |
c97fb132 | 880 | struct dpif_flow_stats stats; |
30053024 | 881 | struct ofpbuf *buf; |
feebdea2 BP |
882 | }; |
883 | ||
96fba48f | 884 | static int |
37a1300c | 885 | dpif_linux_flow_dump_start(const struct dpif *dpif_, void **statep) |
96fba48f | 886 | { |
550f0db4 | 887 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
37a1300c BP |
888 | struct dpif_linux_flow_state *state; |
889 | struct dpif_linux_flow request; | |
890 | struct ofpbuf *buf; | |
891 | ||
892 | *statep = state = xmalloc(sizeof *state); | |
893 | ||
894 | dpif_linux_flow_init(&request); | |
df2c07f4 | 895 | request.cmd = OVS_DP_CMD_GET; |
254f2dc8 | 896 | request.dp_ifindex = dpif->dp_ifindex; |
37a1300c BP |
897 | |
898 | buf = ofpbuf_new(1024); | |
899 | dpif_linux_flow_to_ofpbuf(&request, buf); | |
a88b4e04 | 900 | nl_dump_start(&state->dump, NETLINK_GENERIC, buf); |
37a1300c BP |
901 | ofpbuf_delete(buf); |
902 | ||
30053024 BP |
903 | state->buf = NULL; |
904 | ||
704a1e09 BP |
905 | return 0; |
906 | } | |
907 | ||
908 | static int | |
37a1300c | 909 | dpif_linux_flow_dump_next(const struct dpif *dpif_ OVS_UNUSED, void *state_, |
feebdea2 | 910 | const struct nlattr **key, size_t *key_len, |
e6cc0bab | 911 | const struct nlattr **mask, size_t *mask_len, |
feebdea2 | 912 | const struct nlattr **actions, size_t *actions_len, |
c97fb132 | 913 | const struct dpif_flow_stats **stats) |
704a1e09 | 914 | { |
feebdea2 | 915 | struct dpif_linux_flow_state *state = state_; |
37a1300c | 916 | struct ofpbuf buf; |
96fba48f BP |
917 | int error; |
918 | ||
30053024 BP |
919 | do { |
920 | ofpbuf_delete(state->buf); | |
921 | state->buf = NULL; | |
feebdea2 | 922 | |
30053024 BP |
923 | if (!nl_dump_next(&state->dump, &buf)) { |
924 | return EOF; | |
feebdea2 | 925 | } |
30053024 BP |
926 | |
927 | error = dpif_linux_flow_from_ofpbuf(&state->flow, &buf); | |
928 | if (error) { | |
929 | return error; | |
feebdea2 | 930 | } |
30053024 BP |
931 | |
932 | if (actions && !state->flow.actions) { | |
933 | error = dpif_linux_flow_get__(dpif_, state->flow.key, | |
934 | state->flow.key_len, | |
935 | &state->flow, &state->buf); | |
936 | if (error == ENOENT) { | |
937 | VLOG_DBG("dumped flow disappeared on get"); | |
938 | } else if (error) { | |
10a89ef0 BP |
939 | VLOG_WARN("error fetching dumped flow: %s", |
940 | ovs_strerror(error)); | |
30053024 | 941 | } |
feebdea2 | 942 | } |
30053024 BP |
943 | } while (error); |
944 | ||
945 | if (actions) { | |
946 | *actions = state->flow.actions; | |
947 | *actions_len = state->flow.actions_len; | |
948 | } | |
949 | if (key) { | |
950 | *key = state->flow.key; | |
951 | *key_len = state->flow.key_len; | |
952 | } | |
e6cc0bab AZ |
953 | if (mask) { |
954 | *mask = state->flow.mask; | |
955 | *mask_len = state->flow.mask ? state->flow.mask_len : 0; | |
956 | } | |
30053024 BP |
957 | if (stats) { |
958 | dpif_linux_flow_get_stats(&state->flow, &state->stats); | |
959 | *stats = &state->stats; | |
feebdea2 | 960 | } |
37a1300c | 961 | return error; |
704a1e09 BP |
962 | } |
963 | ||
964 | static int | |
d6569377 | 965 | dpif_linux_flow_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_) |
704a1e09 | 966 | { |
d6569377 | 967 | struct dpif_linux_flow_state *state = state_; |
37a1300c | 968 | int error = nl_dump_done(&state->dump); |
30053024 | 969 | ofpbuf_delete(state->buf); |
704a1e09 | 970 | free(state); |
37a1300c | 971 | return error; |
96fba48f BP |
972 | } |
973 | ||
eabe7c68 BP |
974 | static void |
975 | dpif_linux_encode_execute(int dp_ifindex, const struct dpif_execute *d_exec, | |
976 | struct ofpbuf *buf) | |
96fba48f | 977 | { |
89625d1e | 978 | struct ovs_header *k_exec; |
f7cd0081 | 979 | |
eabe7c68 BP |
980 | ofpbuf_prealloc_tailroom(buf, (64 |
981 | + d_exec->packet->size | |
982 | + d_exec->key_len | |
983 | + d_exec->actions_len)); | |
f7cd0081 | 984 | |
df2c07f4 | 985 | nl_msg_put_genlmsghdr(buf, 0, ovs_packet_family, NLM_F_REQUEST, |
69685a88 | 986 | OVS_PACKET_CMD_EXECUTE, OVS_PACKET_VERSION); |
f7cd0081 | 987 | |
89625d1e BP |
988 | k_exec = ofpbuf_put_uninit(buf, sizeof *k_exec); |
989 | k_exec->dp_ifindex = dp_ifindex; | |
f7cd0081 | 990 | |
89625d1e BP |
991 | nl_msg_put_unspec(buf, OVS_PACKET_ATTR_PACKET, |
992 | d_exec->packet->data, d_exec->packet->size); | |
993 | nl_msg_put_unspec(buf, OVS_PACKET_ATTR_KEY, d_exec->key, d_exec->key_len); | |
994 | nl_msg_put_unspec(buf, OVS_PACKET_ATTR_ACTIONS, | |
995 | d_exec->actions, d_exec->actions_len); | |
6bc60024 BP |
996 | } |
997 | ||
998 | static int | |
89625d1e | 999 | dpif_linux_execute__(int dp_ifindex, const struct dpif_execute *execute) |
6bc60024 | 1000 | { |
eabe7c68 BP |
1001 | uint64_t request_stub[1024 / 8]; |
1002 | struct ofpbuf request; | |
6bc60024 BP |
1003 | int error; |
1004 | ||
eabe7c68 BP |
1005 | ofpbuf_use_stub(&request, request_stub, sizeof request_stub); |
1006 | dpif_linux_encode_execute(dp_ifindex, execute, &request); | |
a88b4e04 | 1007 | error = nl_transact(NETLINK_GENERIC, &request, NULL); |
eabe7c68 | 1008 | ofpbuf_uninit(&request); |
6bc60024 | 1009 | |
f7cd0081 | 1010 | return error; |
96fba48f BP |
1011 | } |
1012 | ||
eb8b28e7 | 1013 | static int |
89625d1e | 1014 | dpif_linux_execute(struct dpif *dpif_, const struct dpif_execute *execute) |
eb8b28e7 | 1015 | { |
550f0db4 | 1016 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
eb8b28e7 | 1017 | |
89625d1e | 1018 | return dpif_linux_execute__(dpif->dp_ifindex, execute); |
eb8b28e7 EJ |
1019 | } |
1020 | ||
eabe7c68 BP |
1021 | #define MAX_OPS 50 |
1022 | ||
6bc60024 | 1023 | static void |
eabe7c68 | 1024 | dpif_linux_operate__(struct dpif *dpif_, struct dpif_op **ops, size_t n_ops) |
6bc60024 | 1025 | { |
550f0db4 | 1026 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
eabe7c68 BP |
1027 | |
1028 | struct op_auxdata { | |
1029 | struct nl_transaction txn; | |
72d32ac0 | 1030 | |
eabe7c68 BP |
1031 | struct ofpbuf request; |
1032 | uint64_t request_stub[1024 / 8]; | |
72d32ac0 BP |
1033 | |
1034 | struct ofpbuf reply; | |
1035 | uint64_t reply_stub[1024 / 8]; | |
eabe7c68 BP |
1036 | } auxes[MAX_OPS]; |
1037 | ||
1038 | struct nl_transaction *txnsp[MAX_OPS]; | |
6bc60024 BP |
1039 | size_t i; |
1040 | ||
cb22974d | 1041 | ovs_assert(n_ops <= MAX_OPS); |
6bc60024 | 1042 | for (i = 0; i < n_ops; i++) { |
eabe7c68 | 1043 | struct op_auxdata *aux = &auxes[i]; |
c2b565b5 | 1044 | struct dpif_op *op = ops[i]; |
b99d3cee BP |
1045 | struct dpif_flow_put *put; |
1046 | struct dpif_flow_del *del; | |
1047 | struct dpif_execute *execute; | |
eabe7c68 BP |
1048 | struct dpif_linux_flow flow; |
1049 | ||
1050 | ofpbuf_use_stub(&aux->request, | |
1051 | aux->request_stub, sizeof aux->request_stub); | |
1052 | aux->txn.request = &aux->request; | |
b99d3cee | 1053 | |
72d32ac0 BP |
1054 | ofpbuf_use_stub(&aux->reply, aux->reply_stub, sizeof aux->reply_stub); |
1055 | aux->txn.reply = NULL; | |
1056 | ||
b99d3cee BP |
1057 | switch (op->type) { |
1058 | case DPIF_OP_FLOW_PUT: | |
1059 | put = &op->u.flow_put; | |
eabe7c68 | 1060 | dpif_linux_init_flow_put(dpif_, put, &flow); |
6bc60024 | 1061 | if (put->stats) { |
eabe7c68 | 1062 | flow.nlmsg_flags |= NLM_F_ECHO; |
72d32ac0 | 1063 | aux->txn.reply = &aux->reply; |
6bc60024 | 1064 | } |
eabe7c68 | 1065 | dpif_linux_flow_to_ofpbuf(&flow, &aux->request); |
b99d3cee BP |
1066 | break; |
1067 | ||
1068 | case DPIF_OP_FLOW_DEL: | |
1069 | del = &op->u.flow_del; | |
eabe7c68 | 1070 | dpif_linux_init_flow_del(dpif_, del, &flow); |
b99d3cee | 1071 | if (del->stats) { |
eabe7c68 | 1072 | flow.nlmsg_flags |= NLM_F_ECHO; |
72d32ac0 | 1073 | aux->txn.reply = &aux->reply; |
b99d3cee | 1074 | } |
eabe7c68 | 1075 | dpif_linux_flow_to_ofpbuf(&flow, &aux->request); |
b99d3cee | 1076 | break; |
6bc60024 | 1077 | |
b99d3cee BP |
1078 | case DPIF_OP_EXECUTE: |
1079 | execute = &op->u.execute; | |
eabe7c68 BP |
1080 | dpif_linux_encode_execute(dpif->dp_ifindex, execute, |
1081 | &aux->request); | |
b99d3cee BP |
1082 | break; |
1083 | ||
1084 | default: | |
6bc60024 BP |
1085 | NOT_REACHED(); |
1086 | } | |
1087 | } | |
1088 | ||
6bc60024 | 1089 | for (i = 0; i < n_ops; i++) { |
eabe7c68 | 1090 | txnsp[i] = &auxes[i].txn; |
6bc60024 | 1091 | } |
a88b4e04 | 1092 | nl_transact_multiple(NETLINK_GENERIC, txnsp, n_ops); |
6bc60024 | 1093 | |
6bc60024 | 1094 | for (i = 0; i < n_ops; i++) { |
72d32ac0 | 1095 | struct op_auxdata *aux = &auxes[i]; |
eabe7c68 | 1096 | struct nl_transaction *txn = &auxes[i].txn; |
c2b565b5 | 1097 | struct dpif_op *op = ops[i]; |
b99d3cee BP |
1098 | struct dpif_flow_put *put; |
1099 | struct dpif_flow_del *del; | |
6bc60024 | 1100 | |
b99d3cee | 1101 | op->error = txn->error; |
6bc60024 | 1102 | |
b99d3cee BP |
1103 | switch (op->type) { |
1104 | case DPIF_OP_FLOW_PUT: | |
1105 | put = &op->u.flow_put; | |
cfceb2b5 | 1106 | if (put->stats) { |
b99d3cee | 1107 | if (!op->error) { |
cfceb2b5 BP |
1108 | struct dpif_linux_flow reply; |
1109 | ||
1110 | op->error = dpif_linux_flow_from_ofpbuf(&reply, | |
1111 | txn->reply); | |
1112 | if (!op->error) { | |
1113 | dpif_linux_flow_get_stats(&reply, put->stats); | |
1114 | } | |
1115 | } | |
1116 | ||
1117 | if (op->error) { | |
1118 | memset(put->stats, 0, sizeof *put->stats); | |
6bc60024 BP |
1119 | } |
1120 | } | |
b99d3cee BP |
1121 | break; |
1122 | ||
1123 | case DPIF_OP_FLOW_DEL: | |
1124 | del = &op->u.flow_del; | |
cfceb2b5 | 1125 | if (del->stats) { |
b99d3cee | 1126 | if (!op->error) { |
cfceb2b5 BP |
1127 | struct dpif_linux_flow reply; |
1128 | ||
1129 | op->error = dpif_linux_flow_from_ofpbuf(&reply, | |
1130 | txn->reply); | |
1131 | if (!op->error) { | |
1132 | dpif_linux_flow_get_stats(&reply, del->stats); | |
1133 | } | |
1134 | } | |
1135 | ||
1136 | if (op->error) { | |
1137 | memset(del->stats, 0, sizeof *del->stats); | |
b99d3cee BP |
1138 | } |
1139 | } | |
1140 | break; | |
1141 | ||
1142 | case DPIF_OP_EXECUTE: | |
1143 | break; | |
1144 | ||
1145 | default: | |
6bc60024 BP |
1146 | NOT_REACHED(); |
1147 | } | |
1148 | ||
72d32ac0 BP |
1149 | ofpbuf_uninit(&aux->request); |
1150 | ofpbuf_uninit(&aux->reply); | |
6bc60024 | 1151 | } |
eabe7c68 BP |
1152 | } |
1153 | ||
1154 | static void | |
1155 | dpif_linux_operate(struct dpif *dpif, struct dpif_op **ops, size_t n_ops) | |
1156 | { | |
1157 | while (n_ops > 0) { | |
1158 | size_t chunk = MIN(n_ops, MAX_OPS); | |
1159 | dpif_linux_operate__(dpif, ops, chunk); | |
1160 | ops += chunk; | |
1161 | n_ops -= chunk; | |
1162 | } | |
6bc60024 BP |
1163 | } |
1164 | ||
96fba48f | 1165 | static int |
a12b3ead | 1166 | dpif_linux_recv_set(struct dpif *dpif_, bool enable) |
96fba48f | 1167 | { |
982b8810 | 1168 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
982b8810 | 1169 | |
a12b3ead | 1170 | if ((dpif->epoll_fd >= 0) == enable) { |
982b8810 | 1171 | return 0; |
17411ecf | 1172 | } |
b063d9f0 | 1173 | |
a12b3ead | 1174 | if (!enable) { |
fe3d61b3 | 1175 | destroy_channels(dpif); |
a12b3ead | 1176 | } else { |
989fd548 JP |
1177 | struct dpif_port_dump port_dump; |
1178 | struct dpif_port port; | |
982b8810 | 1179 | |
989fd548 | 1180 | dpif->epoll_fd = epoll_create(10); |
50f80534 BP |
1181 | if (dpif->epoll_fd < 0) { |
1182 | return errno; | |
1183 | } | |
1184 | ||
989fd548 JP |
1185 | DPIF_PORT_FOR_EACH (&port, &port_dump, &dpif->dpif) { |
1186 | struct dpif_linux_vport vport_request; | |
1187 | struct nl_sock *sock; | |
1188 | uint32_t upcall_pid; | |
1189 | int error; | |
50f80534 | 1190 | |
989fd548 | 1191 | error = nl_sock_create(NETLINK_GENERIC, &sock); |
b063d9f0 | 1192 | if (error) { |
17411ecf | 1193 | return error; |
982b8810 | 1194 | } |
50f80534 | 1195 | |
989fd548 JP |
1196 | upcall_pid = nl_sock_pid(sock); |
1197 | ||
1198 | dpif_linux_vport_init(&vport_request); | |
1199 | vport_request.cmd = OVS_VPORT_CMD_SET; | |
1200 | vport_request.dp_ifindex = dpif->dp_ifindex; | |
1201 | vport_request.port_no = port.port_no; | |
1202 | vport_request.upcall_pid = &upcall_pid; | |
1203 | error = dpif_linux_vport_transact(&vport_request, NULL, NULL); | |
1204 | if (!error) { | |
1205 | VLOG_DBG("%s: assigning port %"PRIu32" to netlink pid %"PRIu32, | |
1206 | dpif_name(&dpif->dpif), vport_request.port_no, | |
1207 | upcall_pid); | |
1208 | } else { | |
1209 | VLOG_WARN_RL(&error_rl, | |
1210 | "%s: failed to set upcall pid on port: %s", | |
10a89ef0 | 1211 | dpif_name(&dpif->dpif), ovs_strerror(error)); |
989fd548 JP |
1212 | nl_sock_destroy(sock); |
1213 | ||
1214 | if (error == ENODEV || error == ENOENT) { | |
1215 | /* This device isn't there, but keep trying the others. */ | |
1216 | continue; | |
1217 | } else { | |
1218 | return error; | |
1219 | } | |
50f80534 | 1220 | } |
14b4d2f9 | 1221 | |
989fd548 JP |
1222 | error = add_channel(dpif, port.port_no, sock); |
1223 | if (error) { | |
1224 | VLOG_INFO("%s: could not add channel for port %s", | |
1225 | dpif_name(dpif_), port.name); | |
1226 | nl_sock_destroy(sock); | |
1227 | return error; | |
1228 | } | |
982b8810 BP |
1229 | } |
1230 | } | |
b063d9f0 | 1231 | |
b063d9f0 | 1232 | return 0; |
96fba48f BP |
1233 | } |
1234 | ||
aae51f53 BP |
1235 | static int |
1236 | dpif_linux_queue_to_priority(const struct dpif *dpif OVS_UNUSED, | |
1237 | uint32_t queue_id, uint32_t *priority) | |
1238 | { | |
1239 | if (queue_id < 0xf000) { | |
17ee3c1f | 1240 | *priority = TC_H_MAKE(1 << 16, queue_id + 1); |
aae51f53 BP |
1241 | return 0; |
1242 | } else { | |
1243 | return EINVAL; | |
1244 | } | |
1245 | } | |
1246 | ||
96fba48f | 1247 | static int |
982b8810 | 1248 | parse_odp_packet(struct ofpbuf *buf, struct dpif_upcall *upcall, |
254f2dc8 | 1249 | int *dp_ifindex) |
856081f6 | 1250 | { |
df2c07f4 | 1251 | static const struct nl_policy ovs_packet_policy[] = { |
856081f6 | 1252 | /* Always present. */ |
df2c07f4 | 1253 | [OVS_PACKET_ATTR_PACKET] = { .type = NL_A_UNSPEC, |
856081f6 | 1254 | .min_len = ETH_HEADER_LEN }, |
df2c07f4 | 1255 | [OVS_PACKET_ATTR_KEY] = { .type = NL_A_NESTED }, |
856081f6 | 1256 | |
df2c07f4 | 1257 | /* OVS_PACKET_CMD_ACTION only. */ |
e995e3df | 1258 | [OVS_PACKET_ATTR_USERDATA] = { .type = NL_A_UNSPEC, .optional = true }, |
856081f6 BP |
1259 | }; |
1260 | ||
df2c07f4 JP |
1261 | struct ovs_header *ovs_header; |
1262 | struct nlattr *a[ARRAY_SIZE(ovs_packet_policy)]; | |
982b8810 BP |
1263 | struct nlmsghdr *nlmsg; |
1264 | struct genlmsghdr *genl; | |
1265 | struct ofpbuf b; | |
aaff4b55 | 1266 | int type; |
982b8810 BP |
1267 | |
1268 | ofpbuf_use_const(&b, buf->data, buf->size); | |
1269 | ||
1270 | nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); | |
1271 | genl = ofpbuf_try_pull(&b, sizeof *genl); | |
df2c07f4 JP |
1272 | ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); |
1273 | if (!nlmsg || !genl || !ovs_header | |
1274 | || nlmsg->nlmsg_type != ovs_packet_family | |
1275 | || !nl_policy_parse(&b, 0, ovs_packet_policy, a, | |
1276 | ARRAY_SIZE(ovs_packet_policy))) { | |
856081f6 BP |
1277 | return EINVAL; |
1278 | } | |
1279 | ||
df2c07f4 JP |
1280 | type = (genl->cmd == OVS_PACKET_CMD_MISS ? DPIF_UC_MISS |
1281 | : genl->cmd == OVS_PACKET_CMD_ACTION ? DPIF_UC_ACTION | |
aaff4b55 BP |
1282 | : -1); |
1283 | if (type < 0) { | |
1284 | return EINVAL; | |
1285 | } | |
82272ede | 1286 | |
aaff4b55 BP |
1287 | memset(upcall, 0, sizeof *upcall); |
1288 | upcall->type = type; | |
856081f6 | 1289 | upcall->packet = buf; |
ebc56baa BP |
1290 | upcall->packet->data = CONST_CAST(struct nlattr *, |
1291 | nl_attr_get(a[OVS_PACKET_ATTR_PACKET])); | |
df2c07f4 | 1292 | upcall->packet->size = nl_attr_get_size(a[OVS_PACKET_ATTR_PACKET]); |
ebc56baa BP |
1293 | upcall->key = CONST_CAST(struct nlattr *, |
1294 | nl_attr_get(a[OVS_PACKET_ATTR_KEY])); | |
df2c07f4 | 1295 | upcall->key_len = nl_attr_get_size(a[OVS_PACKET_ATTR_KEY]); |
e995e3df | 1296 | upcall->userdata = a[OVS_PACKET_ATTR_USERDATA]; |
df2c07f4 | 1297 | *dp_ifindex = ovs_header->dp_ifindex; |
982b8810 | 1298 | |
856081f6 BP |
1299 | return 0; |
1300 | } | |
1301 | ||
1302 | static int | |
90a7c55e BP |
1303 | dpif_linux_recv(struct dpif *dpif_, struct dpif_upcall *upcall, |
1304 | struct ofpbuf *buf) | |
96fba48f BP |
1305 | { |
1306 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
17411ecf | 1307 | int read_tries = 0; |
96fba48f | 1308 | |
a12b3ead | 1309 | if (dpif->epoll_fd < 0) { |
17411ecf | 1310 | return EAGAIN; |
982b8810 BP |
1311 | } |
1312 | ||
989fd548 | 1313 | if (dpif->event_offset >= dpif->n_events) { |
8522ba09 | 1314 | int retval; |
989fd548 JP |
1315 | |
1316 | dpif->event_offset = dpif->n_events = 0; | |
f6d1465c | 1317 | |
8522ba09 | 1318 | do { |
989fd548 JP |
1319 | retval = epoll_wait(dpif->epoll_fd, dpif->epoll_events, |
1320 | dpif->uc_array_size, 0); | |
8522ba09 BP |
1321 | } while (retval < 0 && errno == EINTR); |
1322 | if (retval < 0) { | |
1323 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); | |
10a89ef0 | 1324 | VLOG_WARN_RL(&rl, "epoll_wait failed (%s)", ovs_strerror(errno)); |
989fd548 JP |
1325 | } else if (retval > 0) { |
1326 | dpif->n_events = retval; | |
8522ba09 | 1327 | } |
8522ba09 BP |
1328 | } |
1329 | ||
989fd548 JP |
1330 | while (dpif->event_offset < dpif->n_events) { |
1331 | int idx = dpif->epoll_events[dpif->event_offset].data.u32; | |
1332 | struct dpif_channel *ch = &dpif->channels[idx]; | |
8522ba09 | 1333 | |
989fd548 | 1334 | dpif->event_offset++; |
17411ecf | 1335 | |
f6d1465c | 1336 | for (;;) { |
8522ba09 | 1337 | int dp_ifindex; |
f6d1465c | 1338 | int error; |
17411ecf | 1339 | |
f6d1465c BP |
1340 | if (++read_tries > 50) { |
1341 | return EAGAIN; | |
1342 | } | |
17411ecf | 1343 | |
fe3d61b3 | 1344 | error = nl_sock_recv(ch->sock, buf, false); |
14b4d2f9 BP |
1345 | if (error == ENOBUFS) { |
1346 | /* ENOBUFS typically means that we've received so many | |
1347 | * packets that the buffer overflowed. Try again | |
1348 | * immediately because there's almost certainly a packet | |
1349 | * waiting for us. */ | |
1350 | report_loss(dpif_, ch); | |
1351 | continue; | |
1352 | } | |
1353 | ||
1354 | ch->last_poll = time_msec(); | |
72d32ac0 | 1355 | if (error) { |
72d32ac0 BP |
1356 | if (error == EAGAIN) { |
1357 | break; | |
1358 | } | |
f6d1465c BP |
1359 | return error; |
1360 | } | |
17411ecf | 1361 | |
f6d1465c | 1362 | error = parse_odp_packet(buf, upcall, &dp_ifindex); |
a12b3ead | 1363 | if (!error && dp_ifindex == dpif->dp_ifindex) { |
f6d1465c | 1364 | return 0; |
989fd548 | 1365 | } else if (error) { |
f6d1465c | 1366 | return error; |
17411ecf | 1367 | } |
982b8810 | 1368 | } |
50f80534 | 1369 | } |
982b8810 BP |
1370 | |
1371 | return EAGAIN; | |
96fba48f BP |
1372 | } |
1373 | ||
1374 | static void | |
1375 | dpif_linux_recv_wait(struct dpif *dpif_) | |
1376 | { | |
550f0db4 | 1377 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
17411ecf | 1378 | |
a12b3ead | 1379 | if (dpif->epoll_fd < 0) { |
17411ecf JG |
1380 | return; |
1381 | } | |
1382 | ||
50f80534 | 1383 | poll_fd_wait(dpif->epoll_fd, POLLIN); |
96fba48f BP |
1384 | } |
1385 | ||
1ba530f4 BP |
1386 | static void |
1387 | dpif_linux_recv_purge(struct dpif *dpif_) | |
1388 | { | |
1389 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
fe3d61b3 | 1390 | struct dpif_channel *ch; |
17411ecf | 1391 | |
a12b3ead | 1392 | if (dpif->epoll_fd < 0) { |
17411ecf JG |
1393 | return; |
1394 | } | |
1ba530f4 | 1395 | |
989fd548 JP |
1396 | for (ch = dpif->channels; ch < &dpif->channels[dpif->uc_array_size]; ch++) { |
1397 | if (ch->sock) { | |
1398 | nl_sock_drain(ch->sock); | |
1399 | } | |
1ba530f4 BP |
1400 | } |
1401 | } | |
1402 | ||
96fba48f | 1403 | const struct dpif_class dpif_linux_class = { |
1a6f1e2a | 1404 | "system", |
d3d22744 | 1405 | dpif_linux_enumerate, |
0aeaabc8 | 1406 | NULL, |
96fba48f BP |
1407 | dpif_linux_open, |
1408 | dpif_linux_close, | |
7dab847a | 1409 | dpif_linux_destroy, |
d8abf60c EJ |
1410 | dpif_linux_run, |
1411 | dpif_linux_wait, | |
96fba48f | 1412 | dpif_linux_get_stats, |
96fba48f BP |
1413 | dpif_linux_port_add, |
1414 | dpif_linux_port_del, | |
1415 | dpif_linux_port_query_by_number, | |
1416 | dpif_linux_port_query_by_name, | |
996c1b3d | 1417 | dpif_linux_get_max_ports, |
98403001 | 1418 | dpif_linux_port_get_pid, |
b0ec0f27 BP |
1419 | dpif_linux_port_dump_start, |
1420 | dpif_linux_port_dump_next, | |
1421 | dpif_linux_port_dump_done, | |
e9e28be3 BP |
1422 | dpif_linux_port_poll, |
1423 | dpif_linux_port_poll_wait, | |
96fba48f BP |
1424 | dpif_linux_flow_get, |
1425 | dpif_linux_flow_put, | |
1426 | dpif_linux_flow_del, | |
1427 | dpif_linux_flow_flush, | |
704a1e09 BP |
1428 | dpif_linux_flow_dump_start, |
1429 | dpif_linux_flow_dump_next, | |
1430 | dpif_linux_flow_dump_done, | |
96fba48f | 1431 | dpif_linux_execute, |
6bc60024 | 1432 | dpif_linux_operate, |
a12b3ead | 1433 | dpif_linux_recv_set, |
aae51f53 | 1434 | dpif_linux_queue_to_priority, |
96fba48f BP |
1435 | dpif_linux_recv, |
1436 | dpif_linux_recv_wait, | |
1ba530f4 | 1437 | dpif_linux_recv_purge, |
96fba48f BP |
1438 | }; |
1439 | \f | |
96fba48f | 1440 | static int |
982b8810 | 1441 | dpif_linux_init(void) |
96fba48f | 1442 | { |
eb8ed438 BP |
1443 | static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; |
1444 | static int error; | |
982b8810 | 1445 | |
eb8ed438 | 1446 | if (ovsthread_once_start(&once)) { |
c7178a0b EJ |
1447 | unsigned int ovs_vport_mcgroup; |
1448 | ||
df2c07f4 JP |
1449 | error = nl_lookup_genl_family(OVS_DATAPATH_FAMILY, |
1450 | &ovs_datapath_family); | |
37a1300c BP |
1451 | if (error) { |
1452 | VLOG_ERR("Generic Netlink family '%s' does not exist. " | |
1453 | "The Open vSwitch kernel module is probably not loaded.", | |
df2c07f4 | 1454 | OVS_DATAPATH_FAMILY); |
37a1300c | 1455 | } |
f0fef760 | 1456 | if (!error) { |
df2c07f4 | 1457 | error = nl_lookup_genl_family(OVS_VPORT_FAMILY, &ovs_vport_family); |
f0fef760 | 1458 | } |
37a1300c | 1459 | if (!error) { |
df2c07f4 | 1460 | error = nl_lookup_genl_family(OVS_FLOW_FAMILY, &ovs_flow_family); |
37a1300c | 1461 | } |
aaff4b55 | 1462 | if (!error) { |
df2c07f4 JP |
1463 | error = nl_lookup_genl_family(OVS_PACKET_FAMILY, |
1464 | &ovs_packet_family); | |
aaff4b55 | 1465 | } |
c7178a0b EJ |
1466 | if (!error) { |
1467 | error = nl_lookup_genl_mcgroup(OVS_VPORT_FAMILY, OVS_VPORT_MCGROUP, | |
213a13ed EJ |
1468 | &ovs_vport_mcgroup, |
1469 | OVS_VPORT_MCGROUP_FALLBACK_ID); | |
c7178a0b EJ |
1470 | } |
1471 | if (!error) { | |
1472 | static struct dpif_linux_vport vport; | |
1473 | nln = nln_create(NETLINK_GENERIC, ovs_vport_mcgroup, | |
1474 | dpif_linux_nln_parse, &vport); | |
1475 | } | |
eb8ed438 BP |
1476 | |
1477 | ovsthread_once_done(&once); | |
982b8810 BP |
1478 | } |
1479 | ||
1480 | return error; | |
96fba48f BP |
1481 | } |
1482 | ||
c19e6535 BP |
1483 | bool |
1484 | dpif_linux_is_internal_device(const char *name) | |
9fe3b9a2 | 1485 | { |
c19e6535 BP |
1486 | struct dpif_linux_vport reply; |
1487 | struct ofpbuf *buf; | |
9fe3b9a2 | 1488 | int error; |
96fba48f | 1489 | |
c19e6535 BP |
1490 | error = dpif_linux_vport_get(name, &reply, &buf); |
1491 | if (!error) { | |
1492 | ofpbuf_delete(buf); | |
141d9ce4 | 1493 | } else if (error != ENODEV && error != ENOENT) { |
c19e6535 | 1494 | VLOG_WARN_RL(&error_rl, "%s: vport query failed (%s)", |
10a89ef0 | 1495 | name, ovs_strerror(error)); |
96fba48f BP |
1496 | } |
1497 | ||
df2c07f4 | 1498 | return reply.type == OVS_VPORT_TYPE_INTERNAL; |
96fba48f BP |
1499 | } |
1500 | ||
c7178a0b EJ |
1501 | static bool |
1502 | dpif_linux_nln_parse(struct ofpbuf *buf, void *vport_) | |
1503 | { | |
1504 | struct dpif_linux_vport *vport = vport_; | |
1505 | return dpif_linux_vport_from_ofpbuf(vport, buf) == 0; | |
1506 | } | |
1507 | ||
e9e28be3 | 1508 | static void |
c7178a0b | 1509 | dpif_linux_port_changed(const void *vport_, void *dpif_) |
e9e28be3 | 1510 | { |
c7178a0b | 1511 | const struct dpif_linux_vport *vport = vport_; |
e9e28be3 BP |
1512 | struct dpif_linux *dpif = dpif_; |
1513 | ||
c7178a0b EJ |
1514 | if (vport) { |
1515 | if (vport->dp_ifindex == dpif->dp_ifindex | |
1516 | && (vport->cmd == OVS_VPORT_CMD_NEW | |
1517 | || vport->cmd == OVS_VPORT_CMD_DEL | |
1518 | || vport->cmd == OVS_VPORT_CMD_SET)) { | |
1519 | VLOG_DBG("port_changed: dpif:%s vport:%s cmd:%"PRIu8, | |
1520 | dpif->dpif.full_name, vport->name, vport->cmd); | |
1521 | sset_add(&dpif->changed_ports, vport->name); | |
e9e28be3 | 1522 | } |
8b61709d BP |
1523 | } else { |
1524 | dpif->change_error = true; | |
e9e28be3 BP |
1525 | } |
1526 | } | |
c19e6535 | 1527 | \f |
df2c07f4 | 1528 | /* Parses the contents of 'buf', which contains a "struct ovs_header" followed |
c19e6535 BP |
1529 | * by Netlink attributes, into 'vport'. Returns 0 if successful, otherwise a |
1530 | * positive errno value. | |
1531 | * | |
1532 | * 'vport' will contain pointers into 'buf', so the caller should not free | |
1533 | * 'buf' while 'vport' is still in use. */ | |
1534 | static int | |
1535 | dpif_linux_vport_from_ofpbuf(struct dpif_linux_vport *vport, | |
1536 | const struct ofpbuf *buf) | |
1537 | { | |
df2c07f4 JP |
1538 | static const struct nl_policy ovs_vport_policy[] = { |
1539 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NL_A_U32 }, | |
1540 | [OVS_VPORT_ATTR_TYPE] = { .type = NL_A_U32 }, | |
1541 | [OVS_VPORT_ATTR_NAME] = { .type = NL_A_STRING, .max_len = IFNAMSIZ }, | |
b063d9f0 | 1542 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NL_A_U32 }, |
f7df9823 | 1543 | [OVS_VPORT_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_vport_stats), |
c19e6535 | 1544 | .optional = true }, |
df2c07f4 | 1545 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NL_A_NESTED, .optional = true }, |
c19e6535 BP |
1546 | }; |
1547 | ||
df2c07f4 JP |
1548 | struct nlattr *a[ARRAY_SIZE(ovs_vport_policy)]; |
1549 | struct ovs_header *ovs_header; | |
f0fef760 BP |
1550 | struct nlmsghdr *nlmsg; |
1551 | struct genlmsghdr *genl; | |
1552 | struct ofpbuf b; | |
c19e6535 BP |
1553 | |
1554 | dpif_linux_vport_init(vport); | |
1555 | ||
f0fef760 BP |
1556 | ofpbuf_use_const(&b, buf->data, buf->size); |
1557 | nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); | |
1558 | genl = ofpbuf_try_pull(&b, sizeof *genl); | |
df2c07f4 JP |
1559 | ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); |
1560 | if (!nlmsg || !genl || !ovs_header | |
1561 | || nlmsg->nlmsg_type != ovs_vport_family | |
1562 | || !nl_policy_parse(&b, 0, ovs_vport_policy, a, | |
1563 | ARRAY_SIZE(ovs_vport_policy))) { | |
c19e6535 BP |
1564 | return EINVAL; |
1565 | } | |
c19e6535 | 1566 | |
f0fef760 | 1567 | vport->cmd = genl->cmd; |
df2c07f4 | 1568 | vport->dp_ifindex = ovs_header->dp_ifindex; |
4e022ec0 | 1569 | vport->port_no = nl_attr_get_odp_port(a[OVS_VPORT_ATTR_PORT_NO]); |
df2c07f4 JP |
1570 | vport->type = nl_attr_get_u32(a[OVS_VPORT_ATTR_TYPE]); |
1571 | vport->name = nl_attr_get_string(a[OVS_VPORT_ATTR_NAME]); | |
b063d9f0 | 1572 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { |
a24a6574 | 1573 | vport->upcall_pid = nl_attr_get(a[OVS_VPORT_ATTR_UPCALL_PID]); |
b063d9f0 | 1574 | } |
df2c07f4 JP |
1575 | if (a[OVS_VPORT_ATTR_STATS]) { |
1576 | vport->stats = nl_attr_get(a[OVS_VPORT_ATTR_STATS]); | |
1577 | } | |
df2c07f4 JP |
1578 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
1579 | vport->options = nl_attr_get(a[OVS_VPORT_ATTR_OPTIONS]); | |
1580 | vport->options_len = nl_attr_get_size(a[OVS_VPORT_ATTR_OPTIONS]); | |
c19e6535 | 1581 | } |
c19e6535 BP |
1582 | return 0; |
1583 | } | |
1584 | ||
df2c07f4 | 1585 | /* Appends to 'buf' (which must initially be empty) a "struct ovs_header" |
c19e6535 BP |
1586 | * followed by Netlink attributes corresponding to 'vport'. */ |
1587 | static void | |
1588 | dpif_linux_vport_to_ofpbuf(const struct dpif_linux_vport *vport, | |
1589 | struct ofpbuf *buf) | |
1590 | { | |
df2c07f4 | 1591 | struct ovs_header *ovs_header; |
f0fef760 | 1592 | |
df2c07f4 | 1593 | nl_msg_put_genlmsghdr(buf, 0, ovs_vport_family, NLM_F_REQUEST | NLM_F_ECHO, |
69685a88 | 1594 | vport->cmd, OVS_VPORT_VERSION); |
c19e6535 | 1595 | |
df2c07f4 JP |
1596 | ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header); |
1597 | ovs_header->dp_ifindex = vport->dp_ifindex; | |
c19e6535 | 1598 | |
4e022ec0 AW |
1599 | if (vport->port_no != ODPP_NONE) { |
1600 | nl_msg_put_odp_port(buf, OVS_VPORT_ATTR_PORT_NO, vport->port_no); | |
c19e6535 BP |
1601 | } |
1602 | ||
df2c07f4 JP |
1603 | if (vport->type != OVS_VPORT_TYPE_UNSPEC) { |
1604 | nl_msg_put_u32(buf, OVS_VPORT_ATTR_TYPE, vport->type); | |
c19e6535 BP |
1605 | } |
1606 | ||
1607 | if (vport->name) { | |
df2c07f4 | 1608 | nl_msg_put_string(buf, OVS_VPORT_ATTR_NAME, vport->name); |
c19e6535 BP |
1609 | } |
1610 | ||
a24a6574 BP |
1611 | if (vport->upcall_pid) { |
1612 | nl_msg_put_u32(buf, OVS_VPORT_ATTR_UPCALL_PID, *vport->upcall_pid); | |
1613 | } | |
b063d9f0 | 1614 | |
c19e6535 | 1615 | if (vport->stats) { |
df2c07f4 | 1616 | nl_msg_put_unspec(buf, OVS_VPORT_ATTR_STATS, |
c19e6535 BP |
1617 | vport->stats, sizeof *vport->stats); |
1618 | } | |
1619 | ||
c19e6535 | 1620 | if (vport->options) { |
df2c07f4 | 1621 | nl_msg_put_nested(buf, OVS_VPORT_ATTR_OPTIONS, |
c19e6535 BP |
1622 | vport->options, vport->options_len); |
1623 | } | |
c19e6535 BP |
1624 | } |
1625 | ||
1626 | /* Clears 'vport' to "empty" values. */ | |
1627 | void | |
1628 | dpif_linux_vport_init(struct dpif_linux_vport *vport) | |
1629 | { | |
1630 | memset(vport, 0, sizeof *vport); | |
4e022ec0 | 1631 | vport->port_no = ODPP_NONE; |
c19e6535 BP |
1632 | } |
1633 | ||
1634 | /* Executes 'request' in the kernel datapath. If the command fails, returns a | |
1635 | * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0 | |
1636 | * without doing anything else. If 'reply' and 'bufp' are nonnull, then the | |
df2c07f4 | 1637 | * result of the command is expected to be an ovs_vport also, which is decoded |
c19e6535 BP |
1638 | * and stored in '*reply' and '*bufp'. The caller must free '*bufp' when the |
1639 | * reply is no longer needed ('reply' will contain pointers into '*bufp'). */ | |
1640 | int | |
1641 | dpif_linux_vport_transact(const struct dpif_linux_vport *request, | |
1642 | struct dpif_linux_vport *reply, | |
1643 | struct ofpbuf **bufp) | |
1644 | { | |
f0fef760 | 1645 | struct ofpbuf *request_buf; |
c19e6535 BP |
1646 | int error; |
1647 | ||
cb22974d | 1648 | ovs_assert((reply != NULL) == (bufp != NULL)); |
c19e6535 | 1649 | |
42bb6c72 BP |
1650 | error = dpif_linux_init(); |
1651 | if (error) { | |
1652 | if (reply) { | |
1653 | *bufp = NULL; | |
1654 | dpif_linux_vport_init(reply); | |
1655 | } | |
1656 | return error; | |
1657 | } | |
1658 | ||
f0fef760 BP |
1659 | request_buf = ofpbuf_new(1024); |
1660 | dpif_linux_vport_to_ofpbuf(request, request_buf); | |
a88b4e04 | 1661 | error = nl_transact(NETLINK_GENERIC, request_buf, bufp); |
f0fef760 | 1662 | ofpbuf_delete(request_buf); |
c19e6535 | 1663 | |
f0fef760 BP |
1664 | if (reply) { |
1665 | if (!error) { | |
1666 | error = dpif_linux_vport_from_ofpbuf(reply, *bufp); | |
1667 | } | |
c19e6535 | 1668 | if (error) { |
f0fef760 BP |
1669 | dpif_linux_vport_init(reply); |
1670 | ofpbuf_delete(*bufp); | |
1671 | *bufp = NULL; | |
c19e6535 | 1672 | } |
c19e6535 BP |
1673 | } |
1674 | return error; | |
1675 | } | |
1676 | ||
1677 | /* Obtains information about the kernel vport named 'name' and stores it into | |
1678 | * '*reply' and '*bufp'. The caller must free '*bufp' when the reply is no | |
1679 | * longer needed ('reply' will contain pointers into '*bufp'). */ | |
1680 | int | |
1681 | dpif_linux_vport_get(const char *name, struct dpif_linux_vport *reply, | |
1682 | struct ofpbuf **bufp) | |
1683 | { | |
1684 | struct dpif_linux_vport request; | |
1685 | ||
1686 | dpif_linux_vport_init(&request); | |
df2c07f4 | 1687 | request.cmd = OVS_VPORT_CMD_GET; |
c19e6535 BP |
1688 | request.name = name; |
1689 | ||
1690 | return dpif_linux_vport_transact(&request, reply, bufp); | |
1691 | } | |
d6569377 | 1692 | \f |
df2c07f4 | 1693 | /* Parses the contents of 'buf', which contains a "struct ovs_header" followed |
aaff4b55 BP |
1694 | * by Netlink attributes, into 'dp'. Returns 0 if successful, otherwise a |
1695 | * positive errno value. | |
d6569377 BP |
1696 | * |
1697 | * 'dp' will contain pointers into 'buf', so the caller should not free 'buf' | |
1698 | * while 'dp' is still in use. */ | |
1699 | static int | |
1700 | dpif_linux_dp_from_ofpbuf(struct dpif_linux_dp *dp, const struct ofpbuf *buf) | |
1701 | { | |
df2c07f4 JP |
1702 | static const struct nl_policy ovs_datapath_policy[] = { |
1703 | [OVS_DP_ATTR_NAME] = { .type = NL_A_STRING, .max_len = IFNAMSIZ }, | |
f7df9823 | 1704 | [OVS_DP_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_dp_stats), |
d6569377 | 1705 | .optional = true }, |
d6569377 BP |
1706 | }; |
1707 | ||
df2c07f4 JP |
1708 | struct nlattr *a[ARRAY_SIZE(ovs_datapath_policy)]; |
1709 | struct ovs_header *ovs_header; | |
aaff4b55 BP |
1710 | struct nlmsghdr *nlmsg; |
1711 | struct genlmsghdr *genl; | |
1712 | struct ofpbuf b; | |
d6569377 BP |
1713 | |
1714 | dpif_linux_dp_init(dp); | |
1715 | ||
aaff4b55 BP |
1716 | ofpbuf_use_const(&b, buf->data, buf->size); |
1717 | nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); | |
1718 | genl = ofpbuf_try_pull(&b, sizeof *genl); | |
df2c07f4 JP |
1719 | ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); |
1720 | if (!nlmsg || !genl || !ovs_header | |
1721 | || nlmsg->nlmsg_type != ovs_datapath_family | |
1722 | || !nl_policy_parse(&b, 0, ovs_datapath_policy, a, | |
1723 | ARRAY_SIZE(ovs_datapath_policy))) { | |
d6569377 BP |
1724 | return EINVAL; |
1725 | } | |
d6569377 | 1726 | |
aaff4b55 | 1727 | dp->cmd = genl->cmd; |
df2c07f4 JP |
1728 | dp->dp_ifindex = ovs_header->dp_ifindex; |
1729 | dp->name = nl_attr_get_string(a[OVS_DP_ATTR_NAME]); | |
1730 | if (a[OVS_DP_ATTR_STATS]) { | |
d6569377 BP |
1731 | /* Can't use structure assignment because Netlink doesn't ensure |
1732 | * sufficient alignment for 64-bit members. */ | |
df2c07f4 | 1733 | memcpy(&dp->stats, nl_attr_get(a[OVS_DP_ATTR_STATS]), |
d6569377 BP |
1734 | sizeof dp->stats); |
1735 | } | |
982b8810 | 1736 | |
d6569377 BP |
1737 | return 0; |
1738 | } | |
1739 | ||
aaff4b55 | 1740 | /* Appends to 'buf' the Generic Netlink message described by 'dp'. */ |
d6569377 BP |
1741 | static void |
1742 | dpif_linux_dp_to_ofpbuf(const struct dpif_linux_dp *dp, struct ofpbuf *buf) | |
1743 | { | |
df2c07f4 | 1744 | struct ovs_header *ovs_header; |
d6569377 | 1745 | |
df2c07f4 | 1746 | nl_msg_put_genlmsghdr(buf, 0, ovs_datapath_family, |
69685a88 JG |
1747 | NLM_F_REQUEST | NLM_F_ECHO, dp->cmd, |
1748 | OVS_DATAPATH_VERSION); | |
aaff4b55 | 1749 | |
df2c07f4 JP |
1750 | ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header); |
1751 | ovs_header->dp_ifindex = dp->dp_ifindex; | |
d6569377 BP |
1752 | |
1753 | if (dp->name) { | |
df2c07f4 | 1754 | nl_msg_put_string(buf, OVS_DP_ATTR_NAME, dp->name); |
d6569377 BP |
1755 | } |
1756 | ||
a24a6574 BP |
1757 | if (dp->upcall_pid) { |
1758 | nl_msg_put_u32(buf, OVS_DP_ATTR_UPCALL_PID, *dp->upcall_pid); | |
1759 | } | |
b063d9f0 | 1760 | |
df2c07f4 | 1761 | /* Skip OVS_DP_ATTR_STATS since we never have a reason to serialize it. */ |
d6569377 BP |
1762 | } |
1763 | ||
1764 | /* Clears 'dp' to "empty" values. */ | |
d3d8f1f7 | 1765 | static void |
d6569377 BP |
1766 | dpif_linux_dp_init(struct dpif_linux_dp *dp) |
1767 | { | |
1768 | memset(dp, 0, sizeof *dp); | |
d6569377 BP |
1769 | } |
1770 | ||
aaff4b55 BP |
1771 | static void |
1772 | dpif_linux_dp_dump_start(struct nl_dump *dump) | |
1773 | { | |
1774 | struct dpif_linux_dp request; | |
1775 | struct ofpbuf *buf; | |
1776 | ||
1777 | dpif_linux_dp_init(&request); | |
df2c07f4 | 1778 | request.cmd = OVS_DP_CMD_GET; |
aaff4b55 BP |
1779 | |
1780 | buf = ofpbuf_new(1024); | |
1781 | dpif_linux_dp_to_ofpbuf(&request, buf); | |
a88b4e04 | 1782 | nl_dump_start(dump, NETLINK_GENERIC, buf); |
aaff4b55 BP |
1783 | ofpbuf_delete(buf); |
1784 | } | |
1785 | ||
d6569377 BP |
1786 | /* Executes 'request' in the kernel datapath. If the command fails, returns a |
1787 | * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0 | |
1788 | * without doing anything else. If 'reply' and 'bufp' are nonnull, then the | |
aaff4b55 BP |
1789 | * result of the command is expected to be of the same form, which is decoded |
1790 | * and stored in '*reply' and '*bufp'. The caller must free '*bufp' when the | |
1791 | * reply is no longer needed ('reply' will contain pointers into '*bufp'). */ | |
d3d8f1f7 | 1792 | static int |
d6569377 BP |
1793 | dpif_linux_dp_transact(const struct dpif_linux_dp *request, |
1794 | struct dpif_linux_dp *reply, struct ofpbuf **bufp) | |
1795 | { | |
aaff4b55 | 1796 | struct ofpbuf *request_buf; |
d6569377 | 1797 | int error; |
d6569377 | 1798 | |
cb22974d | 1799 | ovs_assert((reply != NULL) == (bufp != NULL)); |
d6569377 | 1800 | |
aaff4b55 BP |
1801 | request_buf = ofpbuf_new(1024); |
1802 | dpif_linux_dp_to_ofpbuf(request, request_buf); | |
a88b4e04 | 1803 | error = nl_transact(NETLINK_GENERIC, request_buf, bufp); |
aaff4b55 | 1804 | ofpbuf_delete(request_buf); |
d6569377 | 1805 | |
aaff4b55 BP |
1806 | if (reply) { |
1807 | if (!error) { | |
1808 | error = dpif_linux_dp_from_ofpbuf(reply, *bufp); | |
1809 | } | |
d6569377 | 1810 | if (error) { |
aaff4b55 BP |
1811 | dpif_linux_dp_init(reply); |
1812 | ofpbuf_delete(*bufp); | |
1813 | *bufp = NULL; | |
d6569377 | 1814 | } |
d6569377 BP |
1815 | } |
1816 | return error; | |
1817 | } | |
1818 | ||
1819 | /* Obtains information about 'dpif_' and stores it into '*reply' and '*bufp'. | |
1820 | * The caller must free '*bufp' when the reply is no longer needed ('reply' | |
1821 | * will contain pointers into '*bufp'). */ | |
d3d8f1f7 | 1822 | static int |
d6569377 BP |
1823 | dpif_linux_dp_get(const struct dpif *dpif_, struct dpif_linux_dp *reply, |
1824 | struct ofpbuf **bufp) | |
1825 | { | |
1826 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
1827 | struct dpif_linux_dp request; | |
1828 | ||
1829 | dpif_linux_dp_init(&request); | |
df2c07f4 | 1830 | request.cmd = OVS_DP_CMD_GET; |
254f2dc8 | 1831 | request.dp_ifindex = dpif->dp_ifindex; |
d6569377 BP |
1832 | |
1833 | return dpif_linux_dp_transact(&request, reply, bufp); | |
1834 | } | |
1835 | \f | |
df2c07f4 | 1836 | /* Parses the contents of 'buf', which contains a "struct ovs_header" followed |
37a1300c | 1837 | * by Netlink attributes, into 'flow'. Returns 0 if successful, otherwise a |
d6569377 BP |
1838 | * positive errno value. |
1839 | * | |
1840 | * 'flow' will contain pointers into 'buf', so the caller should not free 'buf' | |
1841 | * while 'flow' is still in use. */ | |
1842 | static int | |
1843 | dpif_linux_flow_from_ofpbuf(struct dpif_linux_flow *flow, | |
1844 | const struct ofpbuf *buf) | |
1845 | { | |
df2c07f4 JP |
1846 | static const struct nl_policy ovs_flow_policy[] = { |
1847 | [OVS_FLOW_ATTR_KEY] = { .type = NL_A_NESTED }, | |
e6cc0bab | 1848 | [OVS_FLOW_ATTR_MASK] = { .type = NL_A_NESTED, .optional = true }, |
df2c07f4 | 1849 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NL_A_NESTED, .optional = true }, |
f7df9823 | 1850 | [OVS_FLOW_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_flow_stats), |
d6569377 | 1851 | .optional = true }, |
df2c07f4 JP |
1852 | [OVS_FLOW_ATTR_TCP_FLAGS] = { .type = NL_A_U8, .optional = true }, |
1853 | [OVS_FLOW_ATTR_USED] = { .type = NL_A_U64, .optional = true }, | |
1854 | /* The kernel never uses OVS_FLOW_ATTR_CLEAR. */ | |
d6569377 BP |
1855 | }; |
1856 | ||
df2c07f4 JP |
1857 | struct nlattr *a[ARRAY_SIZE(ovs_flow_policy)]; |
1858 | struct ovs_header *ovs_header; | |
37a1300c BP |
1859 | struct nlmsghdr *nlmsg; |
1860 | struct genlmsghdr *genl; | |
1861 | struct ofpbuf b; | |
d6569377 BP |
1862 | |
1863 | dpif_linux_flow_init(flow); | |
1864 | ||
37a1300c BP |
1865 | ofpbuf_use_const(&b, buf->data, buf->size); |
1866 | nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); | |
1867 | genl = ofpbuf_try_pull(&b, sizeof *genl); | |
df2c07f4 JP |
1868 | ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); |
1869 | if (!nlmsg || !genl || !ovs_header | |
1870 | || nlmsg->nlmsg_type != ovs_flow_family | |
1871 | || !nl_policy_parse(&b, 0, ovs_flow_policy, a, | |
1872 | ARRAY_SIZE(ovs_flow_policy))) { | |
d6569377 BP |
1873 | return EINVAL; |
1874 | } | |
d6569377 | 1875 | |
37a1300c | 1876 | flow->nlmsg_flags = nlmsg->nlmsg_flags; |
df2c07f4 JP |
1877 | flow->dp_ifindex = ovs_header->dp_ifindex; |
1878 | flow->key = nl_attr_get(a[OVS_FLOW_ATTR_KEY]); | |
1879 | flow->key_len = nl_attr_get_size(a[OVS_FLOW_ATTR_KEY]); | |
e6cc0bab AZ |
1880 | |
1881 | if (a[OVS_FLOW_ATTR_MASK]) { | |
1882 | flow->mask = nl_attr_get(a[OVS_FLOW_ATTR_MASK]); | |
1883 | flow->mask_len = nl_attr_get_size(a[OVS_FLOW_ATTR_MASK]); | |
1884 | } | |
df2c07f4 JP |
1885 | if (a[OVS_FLOW_ATTR_ACTIONS]) { |
1886 | flow->actions = nl_attr_get(a[OVS_FLOW_ATTR_ACTIONS]); | |
1887 | flow->actions_len = nl_attr_get_size(a[OVS_FLOW_ATTR_ACTIONS]); | |
d6569377 | 1888 | } |
df2c07f4 JP |
1889 | if (a[OVS_FLOW_ATTR_STATS]) { |
1890 | flow->stats = nl_attr_get(a[OVS_FLOW_ATTR_STATS]); | |
d6569377 | 1891 | } |
df2c07f4 JP |
1892 | if (a[OVS_FLOW_ATTR_TCP_FLAGS]) { |
1893 | flow->tcp_flags = nl_attr_get(a[OVS_FLOW_ATTR_TCP_FLAGS]); | |
d6569377 | 1894 | } |
df2c07f4 JP |
1895 | if (a[OVS_FLOW_ATTR_USED]) { |
1896 | flow->used = nl_attr_get(a[OVS_FLOW_ATTR_USED]); | |
9e980142 | 1897 | } |
d6569377 BP |
1898 | return 0; |
1899 | } | |
1900 | ||
df2c07f4 | 1901 | /* Appends to 'buf' (which must initially be empty) a "struct ovs_header" |
d6569377 BP |
1902 | * followed by Netlink attributes corresponding to 'flow'. */ |
1903 | static void | |
1904 | dpif_linux_flow_to_ofpbuf(const struct dpif_linux_flow *flow, | |
1905 | struct ofpbuf *buf) | |
1906 | { | |
df2c07f4 | 1907 | struct ovs_header *ovs_header; |
d6569377 | 1908 | |
df2c07f4 | 1909 | nl_msg_put_genlmsghdr(buf, 0, ovs_flow_family, |
30b44744 | 1910 | NLM_F_REQUEST | flow->nlmsg_flags, |
69685a88 | 1911 | flow->cmd, OVS_FLOW_VERSION); |
37a1300c | 1912 | |
df2c07f4 JP |
1913 | ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header); |
1914 | ovs_header->dp_ifindex = flow->dp_ifindex; | |
d6569377 BP |
1915 | |
1916 | if (flow->key_len) { | |
df2c07f4 | 1917 | nl_msg_put_unspec(buf, OVS_FLOW_ATTR_KEY, flow->key, flow->key_len); |
d6569377 BP |
1918 | } |
1919 | ||
e6cc0bab AZ |
1920 | if (flow->mask_len) { |
1921 | nl_msg_put_unspec(buf, OVS_FLOW_ATTR_MASK, flow->mask, flow->mask_len); | |
1922 | } | |
1923 | ||
d2a23af2 | 1924 | if (flow->actions || flow->actions_len) { |
df2c07f4 | 1925 | nl_msg_put_unspec(buf, OVS_FLOW_ATTR_ACTIONS, |
d6569377 BP |
1926 | flow->actions, flow->actions_len); |
1927 | } | |
1928 | ||
1929 | /* We never need to send these to the kernel. */ | |
cb22974d BP |
1930 | ovs_assert(!flow->stats); |
1931 | ovs_assert(!flow->tcp_flags); | |
1932 | ovs_assert(!flow->used); | |
d6569377 BP |
1933 | |
1934 | if (flow->clear) { | |
df2c07f4 | 1935 | nl_msg_put_flag(buf, OVS_FLOW_ATTR_CLEAR); |
d6569377 | 1936 | } |
d6569377 BP |
1937 | } |
1938 | ||
1939 | /* Clears 'flow' to "empty" values. */ | |
d3d8f1f7 | 1940 | static void |
d6569377 BP |
1941 | dpif_linux_flow_init(struct dpif_linux_flow *flow) |
1942 | { | |
1943 | memset(flow, 0, sizeof *flow); | |
1944 | } | |
1945 | ||
1946 | /* Executes 'request' in the kernel datapath. If the command fails, returns a | |
1947 | * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0 | |
1948 | * without doing anything else. If 'reply' and 'bufp' are nonnull, then the | |
37a1300c BP |
1949 | * result of the command is expected to be a flow also, which is decoded and |
1950 | * stored in '*reply' and '*bufp'. The caller must free '*bufp' when the reply | |
1951 | * is no longer needed ('reply' will contain pointers into '*bufp'). */ | |
d3d8f1f7 | 1952 | static int |
30b44744 | 1953 | dpif_linux_flow_transact(struct dpif_linux_flow *request, |
d6569377 BP |
1954 | struct dpif_linux_flow *reply, struct ofpbuf **bufp) |
1955 | { | |
37a1300c | 1956 | struct ofpbuf *request_buf; |
d6569377 | 1957 | int error; |
d6569377 | 1958 | |
cb22974d | 1959 | ovs_assert((reply != NULL) == (bufp != NULL)); |
d6569377 | 1960 | |
30b44744 BP |
1961 | if (reply) { |
1962 | request->nlmsg_flags |= NLM_F_ECHO; | |
1963 | } | |
1964 | ||
37a1300c BP |
1965 | request_buf = ofpbuf_new(1024); |
1966 | dpif_linux_flow_to_ofpbuf(request, request_buf); | |
a88b4e04 | 1967 | error = nl_transact(NETLINK_GENERIC, request_buf, bufp); |
37a1300c | 1968 | ofpbuf_delete(request_buf); |
d6569377 | 1969 | |
37a1300c BP |
1970 | if (reply) { |
1971 | if (!error) { | |
1972 | error = dpif_linux_flow_from_ofpbuf(reply, *bufp); | |
1973 | } | |
d6569377 | 1974 | if (error) { |
37a1300c BP |
1975 | dpif_linux_flow_init(reply); |
1976 | ofpbuf_delete(*bufp); | |
1977 | *bufp = NULL; | |
d6569377 | 1978 | } |
d6569377 BP |
1979 | } |
1980 | return error; | |
1981 | } | |
1982 | ||
1983 | static void | |
1984 | dpif_linux_flow_get_stats(const struct dpif_linux_flow *flow, | |
1985 | struct dpif_flow_stats *stats) | |
1986 | { | |
1987 | if (flow->stats) { | |
1988 | stats->n_packets = get_unaligned_u64(&flow->stats->n_packets); | |
1989 | stats->n_bytes = get_unaligned_u64(&flow->stats->n_bytes); | |
1990 | } else { | |
1991 | stats->n_packets = 0; | |
1992 | stats->n_bytes = 0; | |
1993 | } | |
0e70cdcb | 1994 | stats->used = flow->used ? get_32aligned_u64(flow->used) : 0; |
d6569377 BP |
1995 | stats->tcp_flags = flow->tcp_flags ? *flow->tcp_flags : 0; |
1996 | } | |
14b4d2f9 | 1997 | \f |
14b4d2f9 BP |
1998 | /* Logs information about a packet that was recently lost in 'ch' (in |
1999 | * 'dpif_'). */ | |
2000 | static void | |
2001 | report_loss(struct dpif *dpif_, struct dpif_channel *ch) | |
2002 | { | |
2003 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
2004 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 5); | |
14b4d2f9 BP |
2005 | struct ds s; |
2006 | ||
8d675c5a | 2007 | if (VLOG_DROP_WARN(&rl)) { |
14b4d2f9 BP |
2008 | return; |
2009 | } | |
2010 | ||
2011 | ds_init(&s); | |
2012 | if (ch->last_poll != LLONG_MIN) { | |
2013 | ds_put_format(&s, " (last polled %lld ms ago)", | |
2014 | time_msec() - ch->last_poll); | |
2015 | } | |
14b4d2f9 | 2016 | |
8d0abb5e BP |
2017 | VLOG_WARN("%s: lost packet on channel %td%s", |
2018 | dpif_name(dpif_), ch - dpif->channels, ds_cstr(&s)); | |
14b4d2f9 BP |
2019 | ds_destroy(&s); |
2020 | } |