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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. */ |
97be1538 | 143 | struct ovs_mutex upcall_lock; |
989fd548 JP |
144 | int uc_array_size; /* Size of 'channels' and 'epoll_events'. */ |
145 | struct dpif_channel *channels; | |
146 | struct epoll_event *epoll_events; | |
fe3d61b3 | 147 | int epoll_fd; /* epoll fd that includes channel socks. */ |
989fd548 JP |
148 | int n_events; /* Num events returned by epoll_wait(). */ |
149 | int event_offset; /* Offset into 'epoll_events'. */ | |
982b8810 | 150 | |
e9e28be3 | 151 | /* Change notification. */ |
e4516b20 | 152 | struct nl_sock *port_notifier; /* vport multicast group subscriber. */ |
96fba48f BP |
153 | }; |
154 | ||
155 | static struct vlog_rate_limit error_rl = VLOG_RATE_LIMIT_INIT(9999, 5); | |
156 | ||
e4516b20 BP |
157 | /* Generic Netlink family numbers for OVS. |
158 | * | |
159 | * Initialized by dpif_linux_init(). */ | |
df2c07f4 JP |
160 | static int ovs_datapath_family; |
161 | static int ovs_vport_family; | |
162 | static int ovs_flow_family; | |
163 | static int ovs_packet_family; | |
982b8810 | 164 | |
e4516b20 BP |
165 | /* Generic Netlink multicast groups for OVS. |
166 | * | |
167 | * Initialized by dpif_linux_init(). */ | |
168 | static unsigned int ovs_vport_mcgroup; | |
982b8810 BP |
169 | |
170 | static int dpif_linux_init(void); | |
e4516b20 | 171 | static int open_dpif(const struct dpif_linux_dp *, struct dpif **); |
4e022ec0 AW |
172 | static uint32_t dpif_linux_port_get_pid(const struct dpif *, |
173 | odp_port_t port_no); | |
96fba48f | 174 | |
f0fef760 BP |
175 | static void dpif_linux_vport_to_ofpbuf(const struct dpif_linux_vport *, |
176 | struct ofpbuf *); | |
177 | static int dpif_linux_vport_from_ofpbuf(struct dpif_linux_vport *, | |
178 | const struct ofpbuf *); | |
179 | ||
96fba48f BP |
180 | static struct dpif_linux * |
181 | dpif_linux_cast(const struct dpif *dpif) | |
182 | { | |
183 | dpif_assert_class(dpif, &dpif_linux_class); | |
184 | return CONTAINER_OF(dpif, struct dpif_linux, dpif); | |
185 | } | |
186 | ||
d3d22744 | 187 | static int |
d0c23a1a | 188 | dpif_linux_enumerate(struct sset *all_dps) |
d3d22744 | 189 | { |
aaff4b55 BP |
190 | struct nl_dump dump; |
191 | struct ofpbuf msg; | |
aaff4b55 | 192 | int error; |
982b8810 | 193 | |
aaff4b55 BP |
194 | error = dpif_linux_init(); |
195 | if (error) { | |
196 | return error; | |
982b8810 | 197 | } |
d3d22744 | 198 | |
aaff4b55 BP |
199 | dpif_linux_dp_dump_start(&dump); |
200 | while (nl_dump_next(&dump, &msg)) { | |
201 | struct dpif_linux_dp dp; | |
d6569377 | 202 | |
aaff4b55 | 203 | if (!dpif_linux_dp_from_ofpbuf(&dp, &msg)) { |
d0c23a1a | 204 | sset_add(all_dps, dp.name); |
d3d22744 BP |
205 | } |
206 | } | |
aaff4b55 | 207 | return nl_dump_done(&dump); |
d3d22744 BP |
208 | } |
209 | ||
96fba48f | 210 | static int |
4a387741 BP |
211 | dpif_linux_open(const struct dpif_class *class OVS_UNUSED, const char *name, |
212 | bool create, struct dpif **dpifp) | |
96fba48f | 213 | { |
982b8810 | 214 | struct dpif_linux_dp dp_request, dp; |
c19e6535 | 215 | struct ofpbuf *buf; |
ea36840f | 216 | uint32_t upcall_pid; |
c19e6535 | 217 | int error; |
96fba48f | 218 | |
982b8810 BP |
219 | error = dpif_linux_init(); |
220 | if (error) { | |
221 | return error; | |
222 | } | |
223 | ||
982b8810 BP |
224 | /* Create or look up datapath. */ |
225 | dpif_linux_dp_init(&dp_request); | |
ea36840f BP |
226 | if (create) { |
227 | dp_request.cmd = OVS_DP_CMD_NEW; | |
228 | upcall_pid = 0; | |
229 | dp_request.upcall_pid = &upcall_pid; | |
230 | } else { | |
231 | dp_request.cmd = OVS_DP_CMD_GET; | |
232 | } | |
254f2dc8 | 233 | dp_request.name = name; |
982b8810 BP |
234 | error = dpif_linux_dp_transact(&dp_request, &dp, &buf); |
235 | if (error) { | |
236 | return error; | |
c19e6535 | 237 | } |
254f2dc8 | 238 | |
e4516b20 | 239 | error = open_dpif(&dp, dpifp); |
8f4a4df5 | 240 | ofpbuf_delete(buf); |
e4516b20 | 241 | return error; |
c19e6535 BP |
242 | } |
243 | ||
e4516b20 | 244 | static int |
254f2dc8 | 245 | open_dpif(const struct dpif_linux_dp *dp, struct dpif **dpifp) |
c19e6535 | 246 | { |
c19e6535 | 247 | struct dpif_linux *dpif; |
c19e6535 | 248 | |
17411ecf | 249 | dpif = xzalloc(sizeof *dpif); |
e4516b20 | 250 | dpif->port_notifier = NULL; |
97be1538 | 251 | ovs_mutex_init(&dpif->upcall_lock, PTHREAD_MUTEX_DEFAULT); |
50f80534 | 252 | dpif->epoll_fd = -1; |
c19e6535 | 253 | |
254f2dc8 BP |
254 | dpif_init(&dpif->dpif, &dpif_linux_class, dp->name, |
255 | dp->dp_ifindex, dp->dp_ifindex); | |
c19e6535 | 256 | |
254f2dc8 | 257 | dpif->dp_ifindex = dp->dp_ifindex; |
c19e6535 | 258 | *dpifp = &dpif->dpif; |
e4516b20 BP |
259 | |
260 | return 0; | |
96fba48f BP |
261 | } |
262 | ||
17411ecf | 263 | static void |
fe3d61b3 | 264 | destroy_channels(struct dpif_linux *dpif) |
17411ecf | 265 | { |
4e022ec0 | 266 | unsigned int i; |
17411ecf | 267 | |
989fd548 JP |
268 | if (dpif->epoll_fd < 0) { |
269 | return; | |
50f80534 | 270 | } |
989fd548 JP |
271 | |
272 | for (i = 0; i < dpif->uc_array_size; i++ ) { | |
273 | struct dpif_linux_vport vport_request; | |
274 | struct dpif_channel *ch = &dpif->channels[i]; | |
275 | uint32_t upcall_pid = 0; | |
276 | ||
277 | if (!ch->sock) { | |
278 | continue; | |
279 | } | |
280 | ||
9fafa796 BP |
281 | epoll_ctl(dpif->epoll_fd, EPOLL_CTL_DEL, nl_sock_fd(ch->sock), NULL); |
282 | ||
989fd548 JP |
283 | /* Turn off upcalls. */ |
284 | dpif_linux_vport_init(&vport_request); | |
285 | vport_request.cmd = OVS_VPORT_CMD_SET; | |
286 | vport_request.dp_ifindex = dpif->dp_ifindex; | |
4e022ec0 | 287 | vport_request.port_no = u32_to_odp(i); |
989fd548 JP |
288 | vport_request.upcall_pid = &upcall_pid; |
289 | dpif_linux_vport_transact(&vport_request, NULL, NULL); | |
290 | ||
fe3d61b3 | 291 | nl_sock_destroy(ch->sock); |
17411ecf | 292 | } |
989fd548 JP |
293 | |
294 | free(dpif->channels); | |
295 | dpif->channels = NULL; | |
296 | dpif->uc_array_size = 0; | |
297 | ||
298 | free(dpif->epoll_events); | |
299 | dpif->epoll_events = NULL; | |
300 | dpif->n_events = dpif->event_offset = 0; | |
301 | ||
9fafa796 BP |
302 | /* Don't close dpif->epoll_fd since that would cause other threads that |
303 | * call dpif_recv_wait(dpif) to wait on an arbitrary fd or a closed fd. */ | |
989fd548 JP |
304 | } |
305 | ||
306 | static int | |
4e022ec0 | 307 | add_channel(struct dpif_linux *dpif, odp_port_t port_no, struct nl_sock *sock) |
989fd548 JP |
308 | { |
309 | struct epoll_event event; | |
4e022ec0 | 310 | uint32_t port_idx = odp_to_u32(port_no); |
989fd548 JP |
311 | |
312 | if (dpif->epoll_fd < 0) { | |
313 | return 0; | |
314 | } | |
315 | ||
316 | /* We assume that the datapath densely chooses port numbers, which | |
317 | * can therefore be used as an index into an array of channels. */ | |
4e022ec0 AW |
318 | if (port_idx >= dpif->uc_array_size) { |
319 | uint32_t new_size = port_idx + 1; | |
320 | uint32_t i; | |
989fd548 | 321 | |
12d76859 | 322 | if (new_size > MAX_PORTS) { |
989fd548 JP |
323 | VLOG_WARN_RL(&error_rl, "%s: datapath port %"PRIu32" too big", |
324 | dpif_name(&dpif->dpif), port_no); | |
325 | return EFBIG; | |
326 | } | |
327 | ||
328 | dpif->channels = xrealloc(dpif->channels, | |
329 | new_size * sizeof *dpif->channels); | |
330 | for (i = dpif->uc_array_size; i < new_size; i++) { | |
331 | dpif->channels[i].sock = NULL; | |
332 | } | |
333 | ||
334 | dpif->epoll_events = xrealloc(dpif->epoll_events, | |
335 | new_size * sizeof *dpif->epoll_events); | |
336 | dpif->uc_array_size = new_size; | |
337 | } | |
338 | ||
339 | memset(&event, 0, sizeof event); | |
340 | event.events = EPOLLIN; | |
4e022ec0 | 341 | event.data.u32 = port_idx; |
989fd548 JP |
342 | if (epoll_ctl(dpif->epoll_fd, EPOLL_CTL_ADD, nl_sock_fd(sock), |
343 | &event) < 0) { | |
344 | return errno; | |
345 | } | |
346 | ||
4e022ec0 AW |
347 | nl_sock_destroy(dpif->channels[port_idx].sock); |
348 | dpif->channels[port_idx].sock = sock; | |
349 | dpif->channels[port_idx].last_poll = LLONG_MIN; | |
989fd548 JP |
350 | |
351 | return 0; | |
352 | } | |
353 | ||
354 | static void | |
4e022ec0 | 355 | del_channel(struct dpif_linux *dpif, odp_port_t port_no) |
989fd548 JP |
356 | { |
357 | struct dpif_channel *ch; | |
4e022ec0 | 358 | uint32_t port_idx = odp_to_u32(port_no); |
989fd548 | 359 | |
4e022ec0 | 360 | if (dpif->epoll_fd < 0 || port_idx >= dpif->uc_array_size) { |
989fd548 JP |
361 | return; |
362 | } | |
363 | ||
4e022ec0 | 364 | ch = &dpif->channels[port_idx]; |
989fd548 JP |
365 | if (!ch->sock) { |
366 | return; | |
367 | } | |
368 | ||
369 | epoll_ctl(dpif->epoll_fd, EPOLL_CTL_DEL, nl_sock_fd(ch->sock), NULL); | |
fa717215 | 370 | dpif->event_offset = dpif->n_events = 0; |
989fd548 JP |
371 | |
372 | nl_sock_destroy(ch->sock); | |
373 | ch->sock = NULL; | |
17411ecf JG |
374 | } |
375 | ||
96fba48f BP |
376 | static void |
377 | dpif_linux_close(struct dpif *dpif_) | |
378 | { | |
379 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
c7178a0b | 380 | |
e4516b20 | 381 | nl_sock_destroy(dpif->port_notifier); |
fe3d61b3 | 382 | destroy_channels(dpif); |
9fafa796 BP |
383 | if (dpif->epoll_fd >= 0) { |
384 | close(dpif->epoll_fd); | |
385 | } | |
97be1538 | 386 | ovs_mutex_destroy(&dpif->upcall_lock); |
96fba48f BP |
387 | free(dpif); |
388 | } | |
389 | ||
390 | static int | |
7dab847a | 391 | dpif_linux_destroy(struct dpif *dpif_) |
96fba48f | 392 | { |
d6569377 BP |
393 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
394 | struct dpif_linux_dp dp; | |
395 | ||
396 | dpif_linux_dp_init(&dp); | |
df2c07f4 | 397 | dp.cmd = OVS_DP_CMD_DEL; |
254f2dc8 | 398 | dp.dp_ifindex = dpif->dp_ifindex; |
d6569377 | 399 | return dpif_linux_dp_transact(&dp, NULL, NULL); |
96fba48f BP |
400 | } |
401 | ||
402 | static int | |
a8d9304d | 403 | dpif_linux_get_stats(const struct dpif *dpif_, struct dpif_dp_stats *stats) |
96fba48f | 404 | { |
d6569377 BP |
405 | struct dpif_linux_dp dp; |
406 | struct ofpbuf *buf; | |
407 | int error; | |
408 | ||
409 | error = dpif_linux_dp_get(dpif_, &dp, &buf); | |
410 | if (!error) { | |
a8d9304d BP |
411 | stats->n_hit = dp.stats.n_hit; |
412 | stats->n_missed = dp.stats.n_missed; | |
413 | stats->n_lost = dp.stats.n_lost; | |
414 | stats->n_flows = dp.stats.n_flows; | |
d6569377 BP |
415 | ofpbuf_delete(buf); |
416 | } | |
417 | return error; | |
96fba48f BP |
418 | } |
419 | ||
b9ad7294 EJ |
420 | static const char * |
421 | get_vport_type(const struct dpif_linux_vport *vport) | |
422 | { | |
423 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20); | |
424 | ||
425 | switch (vport->type) { | |
426 | case OVS_VPORT_TYPE_NETDEV: | |
427 | return "system"; | |
428 | ||
429 | case OVS_VPORT_TYPE_INTERNAL: | |
430 | return "internal"; | |
431 | ||
432 | case OVS_VPORT_TYPE_GRE: | |
433 | return "gre"; | |
434 | ||
435 | case OVS_VPORT_TYPE_GRE64: | |
436 | return "gre64"; | |
437 | ||
b9ad7294 EJ |
438 | case OVS_VPORT_TYPE_VXLAN: |
439 | return "vxlan"; | |
440 | ||
a6ae068b LJ |
441 | case OVS_VPORT_TYPE_LISP: |
442 | return "lisp"; | |
443 | ||
b9ad7294 EJ |
444 | case OVS_VPORT_TYPE_UNSPEC: |
445 | case __OVS_VPORT_TYPE_MAX: | |
446 | break; | |
447 | } | |
448 | ||
449 | VLOG_WARN_RL(&rl, "dp%d: port `%s' has unsupported type %u", | |
450 | vport->dp_ifindex, vport->name, (unsigned int) vport->type); | |
451 | return "unknown"; | |
452 | } | |
453 | ||
c060c4cf EJ |
454 | static enum ovs_vport_type |
455 | netdev_to_ovs_vport_type(const struct netdev *netdev) | |
456 | { | |
457 | const char *type = netdev_get_type(netdev); | |
458 | ||
459 | if (!strcmp(type, "tap") || !strcmp(type, "system")) { | |
460 | return OVS_VPORT_TYPE_NETDEV; | |
461 | } else if (!strcmp(type, "internal")) { | |
462 | return OVS_VPORT_TYPE_INTERNAL; | |
463 | } else if (strstr(type, "gre64")) { | |
464 | return OVS_VPORT_TYPE_GRE64; | |
465 | } else if (strstr(type, "gre")) { | |
466 | return OVS_VPORT_TYPE_GRE; | |
c060c4cf EJ |
467 | } else if (!strcmp(type, "vxlan")) { |
468 | return OVS_VPORT_TYPE_VXLAN; | |
a6ae068b LJ |
469 | } else if (!strcmp(type, "lisp")) { |
470 | return OVS_VPORT_TYPE_LISP; | |
c060c4cf EJ |
471 | } else { |
472 | return OVS_VPORT_TYPE_UNSPEC; | |
473 | } | |
474 | } | |
475 | ||
96fba48f | 476 | static int |
9fafa796 BP |
477 | dpif_linux_port_add__(struct dpif *dpif_, struct netdev *netdev, |
478 | odp_port_t *port_nop) | |
96fba48f | 479 | { |
c19e6535 | 480 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
26508d9a | 481 | const struct netdev_tunnel_config *tnl_cfg; |
3aa30359 BP |
482 | char namebuf[NETDEV_VPORT_NAME_BUFSIZE]; |
483 | const char *name = netdev_vport_get_dpif_port(netdev, | |
484 | namebuf, sizeof namebuf); | |
c3827f61 | 485 | const char *type = netdev_get_type(netdev); |
c19e6535 | 486 | struct dpif_linux_vport request, reply; |
989fd548 | 487 | struct nl_sock *sock = NULL; |
78a2d59c | 488 | uint32_t upcall_pid; |
c19e6535 | 489 | struct ofpbuf *buf; |
26508d9a KM |
490 | uint64_t options_stub[64 / 8]; |
491 | struct ofpbuf options; | |
78a2d59c | 492 | int error; |
96fba48f | 493 | |
989fd548 JP |
494 | if (dpif->epoll_fd >= 0) { |
495 | error = nl_sock_create(NETLINK_GENERIC, &sock); | |
496 | if (error) { | |
497 | return error; | |
498 | } | |
499 | } | |
500 | ||
c19e6535 | 501 | dpif_linux_vport_init(&request); |
df2c07f4 | 502 | request.cmd = OVS_VPORT_CMD_NEW; |
254f2dc8 | 503 | request.dp_ifindex = dpif->dp_ifindex; |
c060c4cf | 504 | request.type = netdev_to_ovs_vport_type(netdev); |
df2c07f4 | 505 | if (request.type == OVS_VPORT_TYPE_UNSPEC) { |
c283069c BP |
506 | VLOG_WARN_RL(&error_rl, "%s: cannot create port `%s' because it has " |
507 | "unsupported type `%s'", | |
c19e6535 | 508 | dpif_name(dpif_), name, type); |
989fd548 | 509 | nl_sock_destroy(sock); |
c283069c BP |
510 | return EINVAL; |
511 | } | |
c19e6535 | 512 | request.name = name; |
c3827f61 | 513 | |
24b019f8 JP |
514 | if (request.type == OVS_VPORT_TYPE_NETDEV) { |
515 | netdev_linux_ethtool_set_flag(netdev, ETH_FLAG_LRO, "LRO", false); | |
516 | } | |
517 | ||
26508d9a KM |
518 | tnl_cfg = netdev_get_tunnel_config(netdev); |
519 | if (tnl_cfg && tnl_cfg->dst_port != 0) { | |
520 | ofpbuf_use_stack(&options, options_stub, sizeof options_stub); | |
521 | nl_msg_put_u16(&options, OVS_TUNNEL_ATTR_DST_PORT, | |
7e2d8aea | 522 | ntohs(tnl_cfg->dst_port)); |
26508d9a KM |
523 | request.options = options.data; |
524 | request.options_len = options.size; | |
525 | } | |
526 | ||
78a2d59c | 527 | request.port_no = *port_nop; |
989fd548 | 528 | upcall_pid = sock ? nl_sock_pid(sock) : 0; |
78a2d59c | 529 | request.upcall_pid = &upcall_pid; |
95b1d73a | 530 | |
78a2d59c | 531 | error = dpif_linux_vport_transact(&request, &reply, &buf); |
78a2d59c JP |
532 | if (!error) { |
533 | *port_nop = reply.port_no; | |
534 | VLOG_DBG("%s: assigning port %"PRIu32" to netlink pid %"PRIu32, | |
f205882a | 535 | dpif_name(dpif_), reply.port_no, upcall_pid); |
2510ba7c | 536 | } else { |
4e022ec0 | 537 | if (error == EBUSY && *port_nop != ODPP_NONE) { |
2510ba7c JP |
538 | VLOG_INFO("%s: requested port %"PRIu32" is in use", |
539 | dpif_name(dpif_), *port_nop); | |
540 | } | |
989fd548 JP |
541 | nl_sock_destroy(sock); |
542 | ofpbuf_delete(buf); | |
543 | return error; | |
78a2d59c | 544 | } |
78a2d59c | 545 | ofpbuf_delete(buf); |
c3827f61 | 546 | |
989fd548 JP |
547 | if (sock) { |
548 | error = add_channel(dpif, *port_nop, sock); | |
549 | if (error) { | |
550 | VLOG_INFO("%s: could not add channel for port %s", | |
551 | dpif_name(dpif_), name); | |
552 | ||
553 | /* Delete the port. */ | |
554 | dpif_linux_vport_init(&request); | |
555 | request.cmd = OVS_VPORT_CMD_DEL; | |
556 | request.dp_ifindex = dpif->dp_ifindex; | |
557 | request.port_no = *port_nop; | |
558 | dpif_linux_vport_transact(&request, NULL, NULL); | |
559 | ||
560 | nl_sock_destroy(sock); | |
561 | return error; | |
562 | } | |
563 | } | |
564 | ||
565 | return 0; | |
96fba48f BP |
566 | } |
567 | ||
568 | static int | |
9fafa796 BP |
569 | dpif_linux_port_add(struct dpif *dpif_, struct netdev *netdev, |
570 | odp_port_t *port_nop) | |
571 | { | |
572 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
573 | int error; | |
574 | ||
97be1538 | 575 | ovs_mutex_lock(&dpif->upcall_lock); |
9fafa796 | 576 | error = dpif_linux_port_add__(dpif_, netdev, port_nop); |
97be1538 | 577 | ovs_mutex_unlock(&dpif->upcall_lock); |
9fafa796 BP |
578 | |
579 | return error; | |
580 | } | |
581 | ||
582 | static int | |
583 | dpif_linux_port_del__(struct dpif *dpif_, odp_port_t port_no) | |
96fba48f | 584 | { |
c19e6535 BP |
585 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
586 | struct dpif_linux_vport vport; | |
773cd538 | 587 | int error; |
c19e6535 BP |
588 | |
589 | dpif_linux_vport_init(&vport); | |
df2c07f4 | 590 | vport.cmd = OVS_VPORT_CMD_DEL; |
254f2dc8 | 591 | vport.dp_ifindex = dpif->dp_ifindex; |
c19e6535 | 592 | vport.port_no = port_no; |
773cd538 EJ |
593 | error = dpif_linux_vport_transact(&vport, NULL, NULL); |
594 | ||
989fd548 JP |
595 | del_channel(dpif, port_no); |
596 | ||
773cd538 | 597 | return error; |
c3827f61 | 598 | } |
3abc4a1a | 599 | |
9fafa796 BP |
600 | static int |
601 | dpif_linux_port_del(struct dpif *dpif_, odp_port_t port_no) | |
602 | { | |
603 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
604 | int error; | |
605 | ||
97be1538 | 606 | ovs_mutex_lock(&dpif->upcall_lock); |
9fafa796 | 607 | error = dpif_linux_port_del__(dpif_, port_no); |
97be1538 | 608 | ovs_mutex_unlock(&dpif->upcall_lock); |
9fafa796 BP |
609 | |
610 | return error; | |
611 | } | |
612 | ||
c3827f61 | 613 | static int |
4e022ec0 | 614 | dpif_linux_port_query__(const struct dpif *dpif, odp_port_t port_no, |
4c738a8d | 615 | const char *port_name, struct dpif_port *dpif_port) |
c3827f61 | 616 | { |
c19e6535 BP |
617 | struct dpif_linux_vport request; |
618 | struct dpif_linux_vport reply; | |
619 | struct ofpbuf *buf; | |
4c738a8d BP |
620 | int error; |
621 | ||
c19e6535 | 622 | dpif_linux_vport_init(&request); |
df2c07f4 | 623 | request.cmd = OVS_VPORT_CMD_GET; |
254f2dc8 | 624 | request.dp_ifindex = dpif_linux_cast(dpif)->dp_ifindex; |
c19e6535 BP |
625 | request.port_no = port_no; |
626 | request.name = port_name; | |
4c738a8d | 627 | |
c19e6535 BP |
628 | error = dpif_linux_vport_transact(&request, &reply, &buf); |
629 | if (!error) { | |
33db1592 BP |
630 | if (reply.dp_ifindex != request.dp_ifindex) { |
631 | /* A query by name reported that 'port_name' is in some datapath | |
632 | * other than 'dpif', but the caller wants to know about 'dpif'. */ | |
633 | error = ENODEV; | |
4afba28d | 634 | } else if (dpif_port) { |
33db1592 | 635 | dpif_port->name = xstrdup(reply.name); |
b9ad7294 | 636 | dpif_port->type = xstrdup(get_vport_type(&reply)); |
33db1592 BP |
637 | dpif_port->port_no = reply.port_no; |
638 | } | |
c19e6535 | 639 | ofpbuf_delete(buf); |
3abc4a1a | 640 | } |
c19e6535 | 641 | return error; |
96fba48f BP |
642 | } |
643 | ||
644 | static int | |
4e022ec0 | 645 | dpif_linux_port_query_by_number(const struct dpif *dpif, odp_port_t port_no, |
4c738a8d | 646 | struct dpif_port *dpif_port) |
96fba48f | 647 | { |
c19e6535 | 648 | return dpif_linux_port_query__(dpif, port_no, NULL, dpif_port); |
96fba48f BP |
649 | } |
650 | ||
651 | static int | |
4c738a8d BP |
652 | dpif_linux_port_query_by_name(const struct dpif *dpif, const char *devname, |
653 | struct dpif_port *dpif_port) | |
96fba48f | 654 | { |
4c738a8d | 655 | return dpif_linux_port_query__(dpif, 0, devname, dpif_port); |
96fba48f BP |
656 | } |
657 | ||
4e022ec0 | 658 | static odp_port_t |
996c1b3d BP |
659 | dpif_linux_get_max_ports(const struct dpif *dpif OVS_UNUSED) |
660 | { | |
4e022ec0 | 661 | return u32_to_odp(MAX_PORTS); |
996c1b3d BP |
662 | } |
663 | ||
98403001 | 664 | static uint32_t |
4e022ec0 | 665 | dpif_linux_port_get_pid(const struct dpif *dpif_, odp_port_t port_no) |
98403001 | 666 | { |
9fafa796 | 667 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
4e022ec0 | 668 | uint32_t port_idx = odp_to_u32(port_no); |
9fafa796 | 669 | uint32_t pid = 0; |
98403001 | 670 | |
97be1538 | 671 | ovs_mutex_lock(&dpif->upcall_lock); |
9fafa796 | 672 | if (dpif->epoll_fd >= 0) { |
4e022ec0 | 673 | /* The ODPP_NONE "reserved" port number uses the "ovs-system"'s |
989fd548 | 674 | * channel, since it is not heavily loaded. */ |
4e022ec0 | 675 | uint32_t idx = port_idx >= dpif->uc_array_size ? 0 : port_idx; |
9fafa796 | 676 | pid = nl_sock_pid(dpif->channels[idx].sock); |
98403001 | 677 | } |
97be1538 | 678 | ovs_mutex_unlock(&dpif->upcall_lock); |
9fafa796 BP |
679 | |
680 | return pid; | |
98403001 BP |
681 | } |
682 | ||
96fba48f BP |
683 | static int |
684 | dpif_linux_flow_flush(struct dpif *dpif_) | |
685 | { | |
550f0db4 | 686 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
37a1300c BP |
687 | struct dpif_linux_flow flow; |
688 | ||
689 | dpif_linux_flow_init(&flow); | |
df2c07f4 | 690 | flow.cmd = OVS_FLOW_CMD_DEL; |
254f2dc8 | 691 | flow.dp_ifindex = dpif->dp_ifindex; |
37a1300c | 692 | return dpif_linux_flow_transact(&flow, NULL, NULL); |
96fba48f BP |
693 | } |
694 | ||
c19e6535 | 695 | struct dpif_linux_port_state { |
f0fef760 | 696 | struct nl_dump dump; |
c19e6535 BP |
697 | }; |
698 | ||
96fba48f | 699 | static int |
f0fef760 | 700 | dpif_linux_port_dump_start(const struct dpif *dpif_, void **statep) |
96fba48f | 701 | { |
550f0db4 | 702 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
f0fef760 BP |
703 | struct dpif_linux_port_state *state; |
704 | struct dpif_linux_vport request; | |
705 | struct ofpbuf *buf; | |
706 | ||
707 | *statep = state = xmalloc(sizeof *state); | |
708 | ||
709 | dpif_linux_vport_init(&request); | |
df2c07f4 | 710 | request.cmd = OVS_DP_CMD_GET; |
254f2dc8 | 711 | request.dp_ifindex = dpif->dp_ifindex; |
f0fef760 BP |
712 | |
713 | buf = ofpbuf_new(1024); | |
714 | dpif_linux_vport_to_ofpbuf(&request, buf); | |
a88b4e04 | 715 | nl_dump_start(&state->dump, NETLINK_GENERIC, buf); |
f0fef760 BP |
716 | ofpbuf_delete(buf); |
717 | ||
b0ec0f27 BP |
718 | return 0; |
719 | } | |
720 | ||
721 | static int | |
f0fef760 | 722 | dpif_linux_port_dump_next(const struct dpif *dpif OVS_UNUSED, void *state_, |
4c738a8d | 723 | struct dpif_port *dpif_port) |
b0ec0f27 | 724 | { |
c19e6535 | 725 | struct dpif_linux_port_state *state = state_; |
f0fef760 BP |
726 | struct dpif_linux_vport vport; |
727 | struct ofpbuf buf; | |
96fba48f BP |
728 | int error; |
729 | ||
f0fef760 BP |
730 | if (!nl_dump_next(&state->dump, &buf)) { |
731 | return EOF; | |
732 | } | |
c19e6535 | 733 | |
f0fef760 | 734 | error = dpif_linux_vport_from_ofpbuf(&vport, &buf); |
c3827f61 | 735 | if (error) { |
f0fef760 | 736 | return error; |
c3827f61 | 737 | } |
f0fef760 | 738 | |
ebc56baa | 739 | dpif_port->name = CONST_CAST(char *, vport.name); |
b9ad7294 | 740 | dpif_port->type = CONST_CAST(char *, get_vport_type(&vport)); |
f0fef760 BP |
741 | dpif_port->port_no = vport.port_no; |
742 | return 0; | |
b0ec0f27 BP |
743 | } |
744 | ||
745 | static int | |
95b1d73a | 746 | dpif_linux_port_dump_done(const struct dpif *dpif_ OVS_UNUSED, void *state_) |
b0ec0f27 | 747 | { |
c19e6535 | 748 | struct dpif_linux_port_state *state = state_; |
f0fef760 | 749 | int error = nl_dump_done(&state->dump); |
8522b383 | 750 | |
b0ec0f27 | 751 | free(state); |
f0fef760 | 752 | return error; |
96fba48f BP |
753 | } |
754 | ||
e9e28be3 BP |
755 | static int |
756 | dpif_linux_port_poll(const struct dpif *dpif_, char **devnamep) | |
757 | { | |
758 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
e9e28be3 | 759 | |
e4516b20 BP |
760 | /* Lazily create the Netlink socket to listen for notifications. */ |
761 | if (!dpif->port_notifier) { | |
762 | struct nl_sock *sock; | |
763 | int error; | |
764 | ||
765 | error = nl_sock_create(NETLINK_GENERIC, &sock); | |
766 | if (error) { | |
767 | return error; | |
768 | } | |
769 | ||
770 | error = nl_sock_join_mcgroup(sock, ovs_vport_mcgroup); | |
771 | if (error) { | |
772 | nl_sock_destroy(sock); | |
773 | return error; | |
774 | } | |
775 | dpif->port_notifier = sock; | |
776 | ||
777 | /* We have no idea of the current state so report that everything | |
778 | * changed. */ | |
779 | return ENOBUFS; | |
780 | } | |
781 | ||
782 | for (;;) { | |
783 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
784 | uint64_t buf_stub[4096 / 8]; | |
785 | struct ofpbuf buf; | |
786 | int error; | |
787 | ||
788 | ofpbuf_use_stub(&buf, buf_stub, sizeof buf_stub); | |
789 | error = nl_sock_recv(dpif->port_notifier, &buf, false); | |
790 | if (!error) { | |
791 | struct dpif_linux_vport vport; | |
792 | ||
793 | error = dpif_linux_vport_from_ofpbuf(&vport, &buf); | |
794 | if (!error) { | |
795 | if (vport.dp_ifindex == dpif->dp_ifindex | |
796 | && (vport.cmd == OVS_VPORT_CMD_NEW | |
797 | || vport.cmd == OVS_VPORT_CMD_DEL | |
798 | || vport.cmd == OVS_VPORT_CMD_SET)) { | |
799 | VLOG_DBG("port_changed: dpif:%s vport:%s cmd:%"PRIu8, | |
800 | dpif->dpif.full_name, vport.name, vport.cmd); | |
801 | *devnamep = xstrdup(vport.name); | |
59e0c910 | 802 | ofpbuf_uninit(&buf); |
e4516b20 | 803 | return 0; |
e4516b20 BP |
804 | } |
805 | } | |
59e0c910 BP |
806 | } else if (error != EAGAIN) { |
807 | VLOG_WARN_RL(&rl, "error reading or parsing netlink (%s)", | |
808 | ovs_strerror(error)); | |
809 | nl_sock_drain(dpif->port_notifier); | |
810 | error = ENOBUFS; | |
e4516b20 BP |
811 | } |
812 | ||
59e0c910 BP |
813 | ofpbuf_uninit(&buf); |
814 | if (error) { | |
815 | return error; | |
816 | } | |
e9e28be3 | 817 | } |
e9e28be3 BP |
818 | } |
819 | ||
820 | static void | |
821 | dpif_linux_port_poll_wait(const struct dpif *dpif_) | |
822 | { | |
550f0db4 | 823 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
e4516b20 BP |
824 | |
825 | if (dpif->port_notifier) { | |
826 | nl_sock_wait(dpif->port_notifier, POLLIN); | |
827 | } else { | |
e9e28be3 | 828 | poll_immediate_wake(); |
e9e28be3 BP |
829 | } |
830 | } | |
831 | ||
96fba48f | 832 | static int |
30053024 BP |
833 | dpif_linux_flow_get__(const struct dpif *dpif_, |
834 | const struct nlattr *key, size_t key_len, | |
835 | struct dpif_linux_flow *reply, struct ofpbuf **bufp) | |
96fba48f | 836 | { |
550f0db4 | 837 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
30053024 | 838 | struct dpif_linux_flow request; |
feebdea2 | 839 | |
d6569377 | 840 | dpif_linux_flow_init(&request); |
df2c07f4 | 841 | request.cmd = OVS_FLOW_CMD_GET; |
254f2dc8 | 842 | request.dp_ifindex = dpif->dp_ifindex; |
d6569377 BP |
843 | request.key = key; |
844 | request.key_len = key_len; | |
30053024 BP |
845 | return dpif_linux_flow_transact(&request, reply, bufp); |
846 | } | |
847 | ||
848 | static int | |
849 | dpif_linux_flow_get(const struct dpif *dpif_, | |
850 | const struct nlattr *key, size_t key_len, | |
851 | struct ofpbuf **actionsp, struct dpif_flow_stats *stats) | |
852 | { | |
853 | struct dpif_linux_flow reply; | |
854 | struct ofpbuf *buf; | |
855 | int error; | |
856 | ||
857 | error = dpif_linux_flow_get__(dpif_, key, key_len, &reply, &buf); | |
feebdea2 BP |
858 | if (!error) { |
859 | if (stats) { | |
d6569377 | 860 | dpif_linux_flow_get_stats(&reply, stats); |
feebdea2 | 861 | } |
d6569377 | 862 | if (actionsp) { |
ebc56baa | 863 | buf->data = CONST_CAST(struct nlattr *, reply.actions); |
d6569377 BP |
864 | buf->size = reply.actions_len; |
865 | *actionsp = buf; | |
866 | } else { | |
867 | ofpbuf_delete(buf); | |
feebdea2 BP |
868 | } |
869 | } | |
870 | return error; | |
96fba48f BP |
871 | } |
872 | ||
6bc60024 | 873 | static void |
89625d1e | 874 | dpif_linux_init_flow_put(struct dpif *dpif_, const struct dpif_flow_put *put, |
6bc60024 BP |
875 | struct dpif_linux_flow *request) |
876 | { | |
d64e176c | 877 | static const struct nlattr dummy_action; |
6bc60024 | 878 | |
550f0db4 | 879 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
6bc60024 BP |
880 | |
881 | dpif_linux_flow_init(request); | |
89625d1e | 882 | request->cmd = (put->flags & DPIF_FP_CREATE |
6bc60024 BP |
883 | ? OVS_FLOW_CMD_NEW : OVS_FLOW_CMD_SET); |
884 | request->dp_ifindex = dpif->dp_ifindex; | |
89625d1e BP |
885 | request->key = put->key; |
886 | request->key_len = put->key_len; | |
e6cc0bab AZ |
887 | request->mask = put->mask; |
888 | request->mask_len = put->mask_len; | |
6bc60024 | 889 | /* Ensure that OVS_FLOW_ATTR_ACTIONS will always be included. */ |
d64e176c BP |
890 | request->actions = (put->actions |
891 | ? put->actions | |
892 | : CONST_CAST(struct nlattr *, &dummy_action)); | |
89625d1e BP |
893 | request->actions_len = put->actions_len; |
894 | if (put->flags & DPIF_FP_ZERO_STATS) { | |
6bc60024 BP |
895 | request->clear = true; |
896 | } | |
89625d1e | 897 | request->nlmsg_flags = put->flags & DPIF_FP_MODIFY ? 0 : NLM_F_CREATE; |
6bc60024 BP |
898 | } |
899 | ||
96fba48f | 900 | static int |
89625d1e | 901 | dpif_linux_flow_put(struct dpif *dpif_, const struct dpif_flow_put *put) |
96fba48f | 902 | { |
d6569377 BP |
903 | struct dpif_linux_flow request, reply; |
904 | struct ofpbuf *buf; | |
feebdea2 BP |
905 | int error; |
906 | ||
89625d1e | 907 | dpif_linux_init_flow_put(dpif_, put, &request); |
d6569377 | 908 | error = dpif_linux_flow_transact(&request, |
89625d1e BP |
909 | put->stats ? &reply : NULL, |
910 | put->stats ? &buf : NULL); | |
911 | if (!error && put->stats) { | |
912 | dpif_linux_flow_get_stats(&reply, put->stats); | |
d6569377 | 913 | ofpbuf_delete(buf); |
feebdea2 BP |
914 | } |
915 | return error; | |
96fba48f BP |
916 | } |
917 | ||
b99d3cee BP |
918 | static void |
919 | dpif_linux_init_flow_del(struct dpif *dpif_, const struct dpif_flow_del *del, | |
920 | struct dpif_linux_flow *request) | |
96fba48f | 921 | { |
550f0db4 | 922 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
b99d3cee BP |
923 | |
924 | dpif_linux_flow_init(request); | |
925 | request->cmd = OVS_FLOW_CMD_DEL; | |
926 | request->dp_ifindex = dpif->dp_ifindex; | |
927 | request->key = del->key; | |
928 | request->key_len = del->key_len; | |
929 | } | |
930 | ||
931 | static int | |
932 | dpif_linux_flow_del(struct dpif *dpif_, const struct dpif_flow_del *del) | |
933 | { | |
d6569377 BP |
934 | struct dpif_linux_flow request, reply; |
935 | struct ofpbuf *buf; | |
feebdea2 BP |
936 | int error; |
937 | ||
b99d3cee | 938 | dpif_linux_init_flow_del(dpif_, del, &request); |
d6569377 | 939 | error = dpif_linux_flow_transact(&request, |
b99d3cee BP |
940 | del->stats ? &reply : NULL, |
941 | del->stats ? &buf : NULL); | |
942 | if (!error && del->stats) { | |
943 | dpif_linux_flow_get_stats(&reply, del->stats); | |
d6569377 | 944 | ofpbuf_delete(buf); |
feebdea2 BP |
945 | } |
946 | return error; | |
96fba48f BP |
947 | } |
948 | ||
feebdea2 | 949 | struct dpif_linux_flow_state { |
37a1300c | 950 | struct nl_dump dump; |
d6569377 | 951 | struct dpif_linux_flow flow; |
c97fb132 | 952 | struct dpif_flow_stats stats; |
30053024 | 953 | struct ofpbuf *buf; |
feebdea2 BP |
954 | }; |
955 | ||
96fba48f | 956 | static int |
37a1300c | 957 | dpif_linux_flow_dump_start(const struct dpif *dpif_, void **statep) |
96fba48f | 958 | { |
550f0db4 | 959 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
37a1300c BP |
960 | struct dpif_linux_flow_state *state; |
961 | struct dpif_linux_flow request; | |
962 | struct ofpbuf *buf; | |
963 | ||
964 | *statep = state = xmalloc(sizeof *state); | |
965 | ||
966 | dpif_linux_flow_init(&request); | |
df2c07f4 | 967 | request.cmd = OVS_DP_CMD_GET; |
254f2dc8 | 968 | request.dp_ifindex = dpif->dp_ifindex; |
37a1300c BP |
969 | |
970 | buf = ofpbuf_new(1024); | |
971 | dpif_linux_flow_to_ofpbuf(&request, buf); | |
a88b4e04 | 972 | nl_dump_start(&state->dump, NETLINK_GENERIC, buf); |
37a1300c BP |
973 | ofpbuf_delete(buf); |
974 | ||
30053024 BP |
975 | state->buf = NULL; |
976 | ||
704a1e09 BP |
977 | return 0; |
978 | } | |
979 | ||
980 | static int | |
37a1300c | 981 | dpif_linux_flow_dump_next(const struct dpif *dpif_ OVS_UNUSED, void *state_, |
feebdea2 | 982 | const struct nlattr **key, size_t *key_len, |
e6cc0bab | 983 | const struct nlattr **mask, size_t *mask_len, |
feebdea2 | 984 | const struct nlattr **actions, size_t *actions_len, |
c97fb132 | 985 | const struct dpif_flow_stats **stats) |
704a1e09 | 986 | { |
feebdea2 | 987 | struct dpif_linux_flow_state *state = state_; |
37a1300c | 988 | struct ofpbuf buf; |
96fba48f BP |
989 | int error; |
990 | ||
30053024 BP |
991 | do { |
992 | ofpbuf_delete(state->buf); | |
993 | state->buf = NULL; | |
feebdea2 | 994 | |
30053024 BP |
995 | if (!nl_dump_next(&state->dump, &buf)) { |
996 | return EOF; | |
feebdea2 | 997 | } |
30053024 BP |
998 | |
999 | error = dpif_linux_flow_from_ofpbuf(&state->flow, &buf); | |
1000 | if (error) { | |
1001 | return error; | |
feebdea2 | 1002 | } |
30053024 BP |
1003 | |
1004 | if (actions && !state->flow.actions) { | |
1005 | error = dpif_linux_flow_get__(dpif_, state->flow.key, | |
1006 | state->flow.key_len, | |
1007 | &state->flow, &state->buf); | |
1008 | if (error == ENOENT) { | |
1009 | VLOG_DBG("dumped flow disappeared on get"); | |
1010 | } else if (error) { | |
10a89ef0 BP |
1011 | VLOG_WARN("error fetching dumped flow: %s", |
1012 | ovs_strerror(error)); | |
30053024 | 1013 | } |
feebdea2 | 1014 | } |
30053024 BP |
1015 | } while (error); |
1016 | ||
1017 | if (actions) { | |
1018 | *actions = state->flow.actions; | |
1019 | *actions_len = state->flow.actions_len; | |
1020 | } | |
1021 | if (key) { | |
1022 | *key = state->flow.key; | |
1023 | *key_len = state->flow.key_len; | |
1024 | } | |
e6cc0bab AZ |
1025 | if (mask) { |
1026 | *mask = state->flow.mask; | |
1027 | *mask_len = state->flow.mask ? state->flow.mask_len : 0; | |
1028 | } | |
30053024 BP |
1029 | if (stats) { |
1030 | dpif_linux_flow_get_stats(&state->flow, &state->stats); | |
1031 | *stats = &state->stats; | |
feebdea2 | 1032 | } |
37a1300c | 1033 | return error; |
704a1e09 BP |
1034 | } |
1035 | ||
1036 | static int | |
d6569377 | 1037 | dpif_linux_flow_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_) |
704a1e09 | 1038 | { |
d6569377 | 1039 | struct dpif_linux_flow_state *state = state_; |
37a1300c | 1040 | int error = nl_dump_done(&state->dump); |
30053024 | 1041 | ofpbuf_delete(state->buf); |
704a1e09 | 1042 | free(state); |
37a1300c | 1043 | return error; |
96fba48f BP |
1044 | } |
1045 | ||
eabe7c68 BP |
1046 | static void |
1047 | dpif_linux_encode_execute(int dp_ifindex, const struct dpif_execute *d_exec, | |
1048 | struct ofpbuf *buf) | |
96fba48f | 1049 | { |
89625d1e | 1050 | struct ovs_header *k_exec; |
f7cd0081 | 1051 | |
eabe7c68 BP |
1052 | ofpbuf_prealloc_tailroom(buf, (64 |
1053 | + d_exec->packet->size | |
1054 | + d_exec->key_len | |
1055 | + d_exec->actions_len)); | |
f7cd0081 | 1056 | |
df2c07f4 | 1057 | nl_msg_put_genlmsghdr(buf, 0, ovs_packet_family, NLM_F_REQUEST, |
69685a88 | 1058 | OVS_PACKET_CMD_EXECUTE, OVS_PACKET_VERSION); |
f7cd0081 | 1059 | |
89625d1e BP |
1060 | k_exec = ofpbuf_put_uninit(buf, sizeof *k_exec); |
1061 | k_exec->dp_ifindex = dp_ifindex; | |
f7cd0081 | 1062 | |
89625d1e BP |
1063 | nl_msg_put_unspec(buf, OVS_PACKET_ATTR_PACKET, |
1064 | d_exec->packet->data, d_exec->packet->size); | |
1065 | nl_msg_put_unspec(buf, OVS_PACKET_ATTR_KEY, d_exec->key, d_exec->key_len); | |
1066 | nl_msg_put_unspec(buf, OVS_PACKET_ATTR_ACTIONS, | |
1067 | d_exec->actions, d_exec->actions_len); | |
6bc60024 BP |
1068 | } |
1069 | ||
1070 | static int | |
89625d1e | 1071 | dpif_linux_execute__(int dp_ifindex, const struct dpif_execute *execute) |
6bc60024 | 1072 | { |
eabe7c68 BP |
1073 | uint64_t request_stub[1024 / 8]; |
1074 | struct ofpbuf request; | |
6bc60024 BP |
1075 | int error; |
1076 | ||
eabe7c68 BP |
1077 | ofpbuf_use_stub(&request, request_stub, sizeof request_stub); |
1078 | dpif_linux_encode_execute(dp_ifindex, execute, &request); | |
a88b4e04 | 1079 | error = nl_transact(NETLINK_GENERIC, &request, NULL); |
eabe7c68 | 1080 | ofpbuf_uninit(&request); |
6bc60024 | 1081 | |
f7cd0081 | 1082 | return error; |
96fba48f BP |
1083 | } |
1084 | ||
eb8b28e7 | 1085 | static int |
89625d1e | 1086 | dpif_linux_execute(struct dpif *dpif_, const struct dpif_execute *execute) |
eb8b28e7 | 1087 | { |
550f0db4 | 1088 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
eb8b28e7 | 1089 | |
89625d1e | 1090 | return dpif_linux_execute__(dpif->dp_ifindex, execute); |
eb8b28e7 EJ |
1091 | } |
1092 | ||
eabe7c68 BP |
1093 | #define MAX_OPS 50 |
1094 | ||
6bc60024 | 1095 | static void |
eabe7c68 | 1096 | dpif_linux_operate__(struct dpif *dpif_, struct dpif_op **ops, size_t n_ops) |
6bc60024 | 1097 | { |
550f0db4 | 1098 | const struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
eabe7c68 BP |
1099 | |
1100 | struct op_auxdata { | |
1101 | struct nl_transaction txn; | |
72d32ac0 | 1102 | |
eabe7c68 BP |
1103 | struct ofpbuf request; |
1104 | uint64_t request_stub[1024 / 8]; | |
72d32ac0 BP |
1105 | |
1106 | struct ofpbuf reply; | |
1107 | uint64_t reply_stub[1024 / 8]; | |
eabe7c68 BP |
1108 | } auxes[MAX_OPS]; |
1109 | ||
1110 | struct nl_transaction *txnsp[MAX_OPS]; | |
6bc60024 BP |
1111 | size_t i; |
1112 | ||
cb22974d | 1113 | ovs_assert(n_ops <= MAX_OPS); |
6bc60024 | 1114 | for (i = 0; i < n_ops; i++) { |
eabe7c68 | 1115 | struct op_auxdata *aux = &auxes[i]; |
c2b565b5 | 1116 | struct dpif_op *op = ops[i]; |
b99d3cee BP |
1117 | struct dpif_flow_put *put; |
1118 | struct dpif_flow_del *del; | |
1119 | struct dpif_execute *execute; | |
eabe7c68 BP |
1120 | struct dpif_linux_flow flow; |
1121 | ||
1122 | ofpbuf_use_stub(&aux->request, | |
1123 | aux->request_stub, sizeof aux->request_stub); | |
1124 | aux->txn.request = &aux->request; | |
b99d3cee | 1125 | |
72d32ac0 BP |
1126 | ofpbuf_use_stub(&aux->reply, aux->reply_stub, sizeof aux->reply_stub); |
1127 | aux->txn.reply = NULL; | |
1128 | ||
b99d3cee BP |
1129 | switch (op->type) { |
1130 | case DPIF_OP_FLOW_PUT: | |
1131 | put = &op->u.flow_put; | |
eabe7c68 | 1132 | dpif_linux_init_flow_put(dpif_, put, &flow); |
6bc60024 | 1133 | if (put->stats) { |
eabe7c68 | 1134 | flow.nlmsg_flags |= NLM_F_ECHO; |
72d32ac0 | 1135 | aux->txn.reply = &aux->reply; |
6bc60024 | 1136 | } |
eabe7c68 | 1137 | dpif_linux_flow_to_ofpbuf(&flow, &aux->request); |
b99d3cee BP |
1138 | break; |
1139 | ||
1140 | case DPIF_OP_FLOW_DEL: | |
1141 | del = &op->u.flow_del; | |
eabe7c68 | 1142 | dpif_linux_init_flow_del(dpif_, del, &flow); |
b99d3cee | 1143 | if (del->stats) { |
eabe7c68 | 1144 | flow.nlmsg_flags |= NLM_F_ECHO; |
72d32ac0 | 1145 | aux->txn.reply = &aux->reply; |
b99d3cee | 1146 | } |
eabe7c68 | 1147 | dpif_linux_flow_to_ofpbuf(&flow, &aux->request); |
b99d3cee | 1148 | break; |
6bc60024 | 1149 | |
b99d3cee BP |
1150 | case DPIF_OP_EXECUTE: |
1151 | execute = &op->u.execute; | |
eabe7c68 BP |
1152 | dpif_linux_encode_execute(dpif->dp_ifindex, execute, |
1153 | &aux->request); | |
b99d3cee BP |
1154 | break; |
1155 | ||
1156 | default: | |
6bc60024 BP |
1157 | NOT_REACHED(); |
1158 | } | |
1159 | } | |
1160 | ||
6bc60024 | 1161 | for (i = 0; i < n_ops; i++) { |
eabe7c68 | 1162 | txnsp[i] = &auxes[i].txn; |
6bc60024 | 1163 | } |
a88b4e04 | 1164 | nl_transact_multiple(NETLINK_GENERIC, txnsp, n_ops); |
6bc60024 | 1165 | |
6bc60024 | 1166 | for (i = 0; i < n_ops; i++) { |
72d32ac0 | 1167 | struct op_auxdata *aux = &auxes[i]; |
eabe7c68 | 1168 | struct nl_transaction *txn = &auxes[i].txn; |
c2b565b5 | 1169 | struct dpif_op *op = ops[i]; |
b99d3cee BP |
1170 | struct dpif_flow_put *put; |
1171 | struct dpif_flow_del *del; | |
6bc60024 | 1172 | |
b99d3cee | 1173 | op->error = txn->error; |
6bc60024 | 1174 | |
b99d3cee BP |
1175 | switch (op->type) { |
1176 | case DPIF_OP_FLOW_PUT: | |
1177 | put = &op->u.flow_put; | |
cfceb2b5 | 1178 | if (put->stats) { |
b99d3cee | 1179 | if (!op->error) { |
cfceb2b5 BP |
1180 | struct dpif_linux_flow reply; |
1181 | ||
1182 | op->error = dpif_linux_flow_from_ofpbuf(&reply, | |
1183 | txn->reply); | |
1184 | if (!op->error) { | |
1185 | dpif_linux_flow_get_stats(&reply, put->stats); | |
1186 | } | |
1187 | } | |
1188 | ||
1189 | if (op->error) { | |
1190 | memset(put->stats, 0, sizeof *put->stats); | |
6bc60024 BP |
1191 | } |
1192 | } | |
b99d3cee BP |
1193 | break; |
1194 | ||
1195 | case DPIF_OP_FLOW_DEL: | |
1196 | del = &op->u.flow_del; | |
cfceb2b5 | 1197 | if (del->stats) { |
b99d3cee | 1198 | if (!op->error) { |
cfceb2b5 BP |
1199 | struct dpif_linux_flow reply; |
1200 | ||
1201 | op->error = dpif_linux_flow_from_ofpbuf(&reply, | |
1202 | txn->reply); | |
1203 | if (!op->error) { | |
1204 | dpif_linux_flow_get_stats(&reply, del->stats); | |
1205 | } | |
1206 | } | |
1207 | ||
1208 | if (op->error) { | |
1209 | memset(del->stats, 0, sizeof *del->stats); | |
b99d3cee BP |
1210 | } |
1211 | } | |
1212 | break; | |
1213 | ||
1214 | case DPIF_OP_EXECUTE: | |
1215 | break; | |
1216 | ||
1217 | default: | |
6bc60024 BP |
1218 | NOT_REACHED(); |
1219 | } | |
1220 | ||
72d32ac0 BP |
1221 | ofpbuf_uninit(&aux->request); |
1222 | ofpbuf_uninit(&aux->reply); | |
6bc60024 | 1223 | } |
eabe7c68 BP |
1224 | } |
1225 | ||
1226 | static void | |
1227 | dpif_linux_operate(struct dpif *dpif, struct dpif_op **ops, size_t n_ops) | |
1228 | { | |
1229 | while (n_ops > 0) { | |
1230 | size_t chunk = MIN(n_ops, MAX_OPS); | |
1231 | dpif_linux_operate__(dpif, ops, chunk); | |
1232 | ops += chunk; | |
1233 | n_ops -= chunk; | |
1234 | } | |
6bc60024 BP |
1235 | } |
1236 | ||
96fba48f | 1237 | static int |
9fafa796 | 1238 | dpif_linux_recv_set__(struct dpif *dpif_, bool enable) |
96fba48f | 1239 | { |
982b8810 | 1240 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
982b8810 | 1241 | |
a12b3ead | 1242 | if ((dpif->epoll_fd >= 0) == enable) { |
982b8810 | 1243 | return 0; |
17411ecf | 1244 | } |
b063d9f0 | 1245 | |
a12b3ead | 1246 | if (!enable) { |
fe3d61b3 | 1247 | destroy_channels(dpif); |
a12b3ead | 1248 | } else { |
989fd548 JP |
1249 | struct dpif_port_dump port_dump; |
1250 | struct dpif_port port; | |
982b8810 | 1251 | |
50f80534 | 1252 | if (dpif->epoll_fd < 0) { |
9fafa796 BP |
1253 | dpif->epoll_fd = epoll_create(10); |
1254 | if (dpif->epoll_fd < 0) { | |
1255 | return errno; | |
1256 | } | |
50f80534 BP |
1257 | } |
1258 | ||
989fd548 JP |
1259 | DPIF_PORT_FOR_EACH (&port, &port_dump, &dpif->dpif) { |
1260 | struct dpif_linux_vport vport_request; | |
1261 | struct nl_sock *sock; | |
1262 | uint32_t upcall_pid; | |
1263 | int error; | |
50f80534 | 1264 | |
989fd548 | 1265 | error = nl_sock_create(NETLINK_GENERIC, &sock); |
b063d9f0 | 1266 | if (error) { |
17411ecf | 1267 | return error; |
982b8810 | 1268 | } |
50f80534 | 1269 | |
989fd548 JP |
1270 | upcall_pid = nl_sock_pid(sock); |
1271 | ||
1272 | dpif_linux_vport_init(&vport_request); | |
1273 | vport_request.cmd = OVS_VPORT_CMD_SET; | |
1274 | vport_request.dp_ifindex = dpif->dp_ifindex; | |
1275 | vport_request.port_no = port.port_no; | |
1276 | vport_request.upcall_pid = &upcall_pid; | |
1277 | error = dpif_linux_vport_transact(&vport_request, NULL, NULL); | |
1278 | if (!error) { | |
1279 | VLOG_DBG("%s: assigning port %"PRIu32" to netlink pid %"PRIu32, | |
1280 | dpif_name(&dpif->dpif), vport_request.port_no, | |
1281 | upcall_pid); | |
1282 | } else { | |
1283 | VLOG_WARN_RL(&error_rl, | |
1284 | "%s: failed to set upcall pid on port: %s", | |
10a89ef0 | 1285 | dpif_name(&dpif->dpif), ovs_strerror(error)); |
989fd548 JP |
1286 | nl_sock_destroy(sock); |
1287 | ||
1288 | if (error == ENODEV || error == ENOENT) { | |
1289 | /* This device isn't there, but keep trying the others. */ | |
1290 | continue; | |
1291 | } else { | |
1292 | return error; | |
1293 | } | |
50f80534 | 1294 | } |
14b4d2f9 | 1295 | |
989fd548 JP |
1296 | error = add_channel(dpif, port.port_no, sock); |
1297 | if (error) { | |
1298 | VLOG_INFO("%s: could not add channel for port %s", | |
1299 | dpif_name(dpif_), port.name); | |
1300 | nl_sock_destroy(sock); | |
1301 | return error; | |
1302 | } | |
982b8810 BP |
1303 | } |
1304 | } | |
b063d9f0 | 1305 | |
b063d9f0 | 1306 | return 0; |
96fba48f BP |
1307 | } |
1308 | ||
9fafa796 BP |
1309 | static int |
1310 | dpif_linux_recv_set(struct dpif *dpif_, bool enable) | |
1311 | { | |
1312 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
1313 | int error; | |
1314 | ||
97be1538 | 1315 | ovs_mutex_lock(&dpif->upcall_lock); |
9fafa796 | 1316 | error = dpif_linux_recv_set__(dpif_, enable); |
97be1538 | 1317 | ovs_mutex_unlock(&dpif->upcall_lock); |
9fafa796 BP |
1318 | |
1319 | return error; | |
1320 | } | |
1321 | ||
aae51f53 BP |
1322 | static int |
1323 | dpif_linux_queue_to_priority(const struct dpif *dpif OVS_UNUSED, | |
1324 | uint32_t queue_id, uint32_t *priority) | |
1325 | { | |
1326 | if (queue_id < 0xf000) { | |
17ee3c1f | 1327 | *priority = TC_H_MAKE(1 << 16, queue_id + 1); |
aae51f53 BP |
1328 | return 0; |
1329 | } else { | |
1330 | return EINVAL; | |
1331 | } | |
1332 | } | |
1333 | ||
96fba48f | 1334 | static int |
982b8810 | 1335 | parse_odp_packet(struct ofpbuf *buf, struct dpif_upcall *upcall, |
254f2dc8 | 1336 | int *dp_ifindex) |
856081f6 | 1337 | { |
df2c07f4 | 1338 | static const struct nl_policy ovs_packet_policy[] = { |
856081f6 | 1339 | /* Always present. */ |
df2c07f4 | 1340 | [OVS_PACKET_ATTR_PACKET] = { .type = NL_A_UNSPEC, |
856081f6 | 1341 | .min_len = ETH_HEADER_LEN }, |
df2c07f4 | 1342 | [OVS_PACKET_ATTR_KEY] = { .type = NL_A_NESTED }, |
856081f6 | 1343 | |
df2c07f4 | 1344 | /* OVS_PACKET_CMD_ACTION only. */ |
e995e3df | 1345 | [OVS_PACKET_ATTR_USERDATA] = { .type = NL_A_UNSPEC, .optional = true }, |
856081f6 BP |
1346 | }; |
1347 | ||
df2c07f4 JP |
1348 | struct ovs_header *ovs_header; |
1349 | struct nlattr *a[ARRAY_SIZE(ovs_packet_policy)]; | |
982b8810 BP |
1350 | struct nlmsghdr *nlmsg; |
1351 | struct genlmsghdr *genl; | |
1352 | struct ofpbuf b; | |
aaff4b55 | 1353 | int type; |
982b8810 BP |
1354 | |
1355 | ofpbuf_use_const(&b, buf->data, buf->size); | |
1356 | ||
1357 | nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); | |
1358 | genl = ofpbuf_try_pull(&b, sizeof *genl); | |
df2c07f4 JP |
1359 | ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); |
1360 | if (!nlmsg || !genl || !ovs_header | |
1361 | || nlmsg->nlmsg_type != ovs_packet_family | |
1362 | || !nl_policy_parse(&b, 0, ovs_packet_policy, a, | |
1363 | ARRAY_SIZE(ovs_packet_policy))) { | |
856081f6 BP |
1364 | return EINVAL; |
1365 | } | |
1366 | ||
df2c07f4 JP |
1367 | type = (genl->cmd == OVS_PACKET_CMD_MISS ? DPIF_UC_MISS |
1368 | : genl->cmd == OVS_PACKET_CMD_ACTION ? DPIF_UC_ACTION | |
aaff4b55 BP |
1369 | : -1); |
1370 | if (type < 0) { | |
1371 | return EINVAL; | |
1372 | } | |
82272ede | 1373 | |
aaff4b55 BP |
1374 | memset(upcall, 0, sizeof *upcall); |
1375 | upcall->type = type; | |
856081f6 | 1376 | upcall->packet = buf; |
ebc56baa BP |
1377 | upcall->packet->data = CONST_CAST(struct nlattr *, |
1378 | nl_attr_get(a[OVS_PACKET_ATTR_PACKET])); | |
df2c07f4 | 1379 | upcall->packet->size = nl_attr_get_size(a[OVS_PACKET_ATTR_PACKET]); |
ebc56baa BP |
1380 | upcall->key = CONST_CAST(struct nlattr *, |
1381 | nl_attr_get(a[OVS_PACKET_ATTR_KEY])); | |
df2c07f4 | 1382 | upcall->key_len = nl_attr_get_size(a[OVS_PACKET_ATTR_KEY]); |
e995e3df | 1383 | upcall->userdata = a[OVS_PACKET_ATTR_USERDATA]; |
df2c07f4 | 1384 | *dp_ifindex = ovs_header->dp_ifindex; |
982b8810 | 1385 | |
856081f6 BP |
1386 | return 0; |
1387 | } | |
1388 | ||
1389 | static int | |
9fafa796 BP |
1390 | dpif_linux_recv__(struct dpif *dpif_, struct dpif_upcall *upcall, |
1391 | struct ofpbuf *buf) | |
96fba48f BP |
1392 | { |
1393 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
17411ecf | 1394 | int read_tries = 0; |
96fba48f | 1395 | |
a12b3ead | 1396 | if (dpif->epoll_fd < 0) { |
17411ecf | 1397 | return EAGAIN; |
982b8810 BP |
1398 | } |
1399 | ||
989fd548 | 1400 | if (dpif->event_offset >= dpif->n_events) { |
8522ba09 | 1401 | int retval; |
989fd548 JP |
1402 | |
1403 | dpif->event_offset = dpif->n_events = 0; | |
f6d1465c | 1404 | |
8522ba09 | 1405 | do { |
989fd548 JP |
1406 | retval = epoll_wait(dpif->epoll_fd, dpif->epoll_events, |
1407 | dpif->uc_array_size, 0); | |
8522ba09 BP |
1408 | } while (retval < 0 && errno == EINTR); |
1409 | if (retval < 0) { | |
1410 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); | |
10a89ef0 | 1411 | VLOG_WARN_RL(&rl, "epoll_wait failed (%s)", ovs_strerror(errno)); |
989fd548 JP |
1412 | } else if (retval > 0) { |
1413 | dpif->n_events = retval; | |
8522ba09 | 1414 | } |
8522ba09 BP |
1415 | } |
1416 | ||
989fd548 JP |
1417 | while (dpif->event_offset < dpif->n_events) { |
1418 | int idx = dpif->epoll_events[dpif->event_offset].data.u32; | |
1419 | struct dpif_channel *ch = &dpif->channels[idx]; | |
8522ba09 | 1420 | |
989fd548 | 1421 | dpif->event_offset++; |
17411ecf | 1422 | |
f6d1465c | 1423 | for (;;) { |
8522ba09 | 1424 | int dp_ifindex; |
f6d1465c | 1425 | int error; |
17411ecf | 1426 | |
f6d1465c BP |
1427 | if (++read_tries > 50) { |
1428 | return EAGAIN; | |
1429 | } | |
17411ecf | 1430 | |
fe3d61b3 | 1431 | error = nl_sock_recv(ch->sock, buf, false); |
14b4d2f9 BP |
1432 | if (error == ENOBUFS) { |
1433 | /* ENOBUFS typically means that we've received so many | |
1434 | * packets that the buffer overflowed. Try again | |
1435 | * immediately because there's almost certainly a packet | |
1436 | * waiting for us. */ | |
1437 | report_loss(dpif_, ch); | |
1438 | continue; | |
1439 | } | |
1440 | ||
1441 | ch->last_poll = time_msec(); | |
72d32ac0 | 1442 | if (error) { |
72d32ac0 BP |
1443 | if (error == EAGAIN) { |
1444 | break; | |
1445 | } | |
f6d1465c BP |
1446 | return error; |
1447 | } | |
17411ecf | 1448 | |
f6d1465c | 1449 | error = parse_odp_packet(buf, upcall, &dp_ifindex); |
a12b3ead | 1450 | if (!error && dp_ifindex == dpif->dp_ifindex) { |
f6d1465c | 1451 | return 0; |
989fd548 | 1452 | } else if (error) { |
f6d1465c | 1453 | return error; |
17411ecf | 1454 | } |
982b8810 | 1455 | } |
50f80534 | 1456 | } |
982b8810 BP |
1457 | |
1458 | return EAGAIN; | |
96fba48f BP |
1459 | } |
1460 | ||
9fafa796 BP |
1461 | static int |
1462 | dpif_linux_recv(struct dpif *dpif_, struct dpif_upcall *upcall, | |
1463 | struct ofpbuf *buf) | |
1464 | { | |
1465 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
1466 | int error; | |
1467 | ||
97be1538 | 1468 | ovs_mutex_lock(&dpif->upcall_lock); |
9fafa796 | 1469 | error = dpif_linux_recv__(dpif_, upcall, buf); |
97be1538 | 1470 | ovs_mutex_unlock(&dpif->upcall_lock); |
9fafa796 BP |
1471 | |
1472 | return error; | |
1473 | } | |
1474 | ||
96fba48f BP |
1475 | static void |
1476 | dpif_linux_recv_wait(struct dpif *dpif_) | |
1477 | { | |
9fafa796 | 1478 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
17411ecf | 1479 | |
97be1538 | 1480 | ovs_mutex_lock(&dpif->upcall_lock); |
9fafa796 BP |
1481 | if (dpif->epoll_fd >= 0) { |
1482 | poll_fd_wait(dpif->epoll_fd, POLLIN); | |
17411ecf | 1483 | } |
97be1538 | 1484 | ovs_mutex_unlock(&dpif->upcall_lock); |
96fba48f BP |
1485 | } |
1486 | ||
1ba530f4 BP |
1487 | static void |
1488 | dpif_linux_recv_purge(struct dpif *dpif_) | |
1489 | { | |
1490 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
17411ecf | 1491 | |
97be1538 | 1492 | ovs_mutex_lock(&dpif->upcall_lock); |
9fafa796 BP |
1493 | if (dpif->epoll_fd >= 0) { |
1494 | struct dpif_channel *ch; | |
1ba530f4 | 1495 | |
9fafa796 BP |
1496 | for (ch = dpif->channels; ch < &dpif->channels[dpif->uc_array_size]; |
1497 | ch++) { | |
1498 | if (ch->sock) { | |
1499 | nl_sock_drain(ch->sock); | |
1500 | } | |
989fd548 | 1501 | } |
1ba530f4 | 1502 | } |
97be1538 | 1503 | ovs_mutex_unlock(&dpif->upcall_lock); |
1ba530f4 BP |
1504 | } |
1505 | ||
96fba48f | 1506 | const struct dpif_class dpif_linux_class = { |
1a6f1e2a | 1507 | "system", |
d3d22744 | 1508 | dpif_linux_enumerate, |
0aeaabc8 | 1509 | NULL, |
96fba48f BP |
1510 | dpif_linux_open, |
1511 | dpif_linux_close, | |
7dab847a | 1512 | dpif_linux_destroy, |
e4516b20 BP |
1513 | NULL, /* run */ |
1514 | NULL, /* wait */ | |
96fba48f | 1515 | dpif_linux_get_stats, |
96fba48f BP |
1516 | dpif_linux_port_add, |
1517 | dpif_linux_port_del, | |
1518 | dpif_linux_port_query_by_number, | |
1519 | dpif_linux_port_query_by_name, | |
996c1b3d | 1520 | dpif_linux_get_max_ports, |
98403001 | 1521 | dpif_linux_port_get_pid, |
b0ec0f27 BP |
1522 | dpif_linux_port_dump_start, |
1523 | dpif_linux_port_dump_next, | |
1524 | dpif_linux_port_dump_done, | |
e9e28be3 BP |
1525 | dpif_linux_port_poll, |
1526 | dpif_linux_port_poll_wait, | |
96fba48f BP |
1527 | dpif_linux_flow_get, |
1528 | dpif_linux_flow_put, | |
1529 | dpif_linux_flow_del, | |
1530 | dpif_linux_flow_flush, | |
704a1e09 BP |
1531 | dpif_linux_flow_dump_start, |
1532 | dpif_linux_flow_dump_next, | |
1533 | dpif_linux_flow_dump_done, | |
96fba48f | 1534 | dpif_linux_execute, |
6bc60024 | 1535 | dpif_linux_operate, |
a12b3ead | 1536 | dpif_linux_recv_set, |
aae51f53 | 1537 | dpif_linux_queue_to_priority, |
96fba48f BP |
1538 | dpif_linux_recv, |
1539 | dpif_linux_recv_wait, | |
1ba530f4 | 1540 | dpif_linux_recv_purge, |
96fba48f BP |
1541 | }; |
1542 | \f | |
96fba48f | 1543 | static int |
982b8810 | 1544 | dpif_linux_init(void) |
96fba48f | 1545 | { |
eb8ed438 BP |
1546 | static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; |
1547 | static int error; | |
982b8810 | 1548 | |
eb8ed438 | 1549 | if (ovsthread_once_start(&once)) { |
df2c07f4 JP |
1550 | error = nl_lookup_genl_family(OVS_DATAPATH_FAMILY, |
1551 | &ovs_datapath_family); | |
37a1300c BP |
1552 | if (error) { |
1553 | VLOG_ERR("Generic Netlink family '%s' does not exist. " | |
1554 | "The Open vSwitch kernel module is probably not loaded.", | |
df2c07f4 | 1555 | OVS_DATAPATH_FAMILY); |
37a1300c | 1556 | } |
f0fef760 | 1557 | if (!error) { |
df2c07f4 | 1558 | error = nl_lookup_genl_family(OVS_VPORT_FAMILY, &ovs_vport_family); |
f0fef760 | 1559 | } |
37a1300c | 1560 | if (!error) { |
df2c07f4 | 1561 | error = nl_lookup_genl_family(OVS_FLOW_FAMILY, &ovs_flow_family); |
37a1300c | 1562 | } |
aaff4b55 | 1563 | if (!error) { |
df2c07f4 JP |
1564 | error = nl_lookup_genl_family(OVS_PACKET_FAMILY, |
1565 | &ovs_packet_family); | |
aaff4b55 | 1566 | } |
c7178a0b EJ |
1567 | if (!error) { |
1568 | error = nl_lookup_genl_mcgroup(OVS_VPORT_FAMILY, OVS_VPORT_MCGROUP, | |
213a13ed EJ |
1569 | &ovs_vport_mcgroup, |
1570 | OVS_VPORT_MCGROUP_FALLBACK_ID); | |
c7178a0b | 1571 | } |
eb8ed438 BP |
1572 | |
1573 | ovsthread_once_done(&once); | |
982b8810 BP |
1574 | } |
1575 | ||
1576 | return error; | |
96fba48f BP |
1577 | } |
1578 | ||
c19e6535 BP |
1579 | bool |
1580 | dpif_linux_is_internal_device(const char *name) | |
9fe3b9a2 | 1581 | { |
c19e6535 BP |
1582 | struct dpif_linux_vport reply; |
1583 | struct ofpbuf *buf; | |
9fe3b9a2 | 1584 | int error; |
96fba48f | 1585 | |
c19e6535 BP |
1586 | error = dpif_linux_vport_get(name, &reply, &buf); |
1587 | if (!error) { | |
1588 | ofpbuf_delete(buf); | |
141d9ce4 | 1589 | } else if (error != ENODEV && error != ENOENT) { |
c19e6535 | 1590 | VLOG_WARN_RL(&error_rl, "%s: vport query failed (%s)", |
10a89ef0 | 1591 | name, ovs_strerror(error)); |
96fba48f BP |
1592 | } |
1593 | ||
df2c07f4 | 1594 | return reply.type == OVS_VPORT_TYPE_INTERNAL; |
96fba48f | 1595 | } |
c19e6535 | 1596 | \f |
df2c07f4 | 1597 | /* Parses the contents of 'buf', which contains a "struct ovs_header" followed |
c19e6535 BP |
1598 | * by Netlink attributes, into 'vport'. Returns 0 if successful, otherwise a |
1599 | * positive errno value. | |
1600 | * | |
1601 | * 'vport' will contain pointers into 'buf', so the caller should not free | |
1602 | * 'buf' while 'vport' is still in use. */ | |
1603 | static int | |
1604 | dpif_linux_vport_from_ofpbuf(struct dpif_linux_vport *vport, | |
1605 | const struct ofpbuf *buf) | |
1606 | { | |
df2c07f4 JP |
1607 | static const struct nl_policy ovs_vport_policy[] = { |
1608 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NL_A_U32 }, | |
1609 | [OVS_VPORT_ATTR_TYPE] = { .type = NL_A_U32 }, | |
1610 | [OVS_VPORT_ATTR_NAME] = { .type = NL_A_STRING, .max_len = IFNAMSIZ }, | |
b063d9f0 | 1611 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NL_A_U32 }, |
f7df9823 | 1612 | [OVS_VPORT_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_vport_stats), |
c19e6535 | 1613 | .optional = true }, |
df2c07f4 | 1614 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NL_A_NESTED, .optional = true }, |
c19e6535 BP |
1615 | }; |
1616 | ||
df2c07f4 JP |
1617 | struct nlattr *a[ARRAY_SIZE(ovs_vport_policy)]; |
1618 | struct ovs_header *ovs_header; | |
f0fef760 BP |
1619 | struct nlmsghdr *nlmsg; |
1620 | struct genlmsghdr *genl; | |
1621 | struct ofpbuf b; | |
c19e6535 BP |
1622 | |
1623 | dpif_linux_vport_init(vport); | |
1624 | ||
f0fef760 BP |
1625 | ofpbuf_use_const(&b, buf->data, buf->size); |
1626 | nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); | |
1627 | genl = ofpbuf_try_pull(&b, sizeof *genl); | |
df2c07f4 JP |
1628 | ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); |
1629 | if (!nlmsg || !genl || !ovs_header | |
1630 | || nlmsg->nlmsg_type != ovs_vport_family | |
1631 | || !nl_policy_parse(&b, 0, ovs_vport_policy, a, | |
1632 | ARRAY_SIZE(ovs_vport_policy))) { | |
c19e6535 BP |
1633 | return EINVAL; |
1634 | } | |
c19e6535 | 1635 | |
f0fef760 | 1636 | vport->cmd = genl->cmd; |
df2c07f4 | 1637 | vport->dp_ifindex = ovs_header->dp_ifindex; |
4e022ec0 | 1638 | vport->port_no = nl_attr_get_odp_port(a[OVS_VPORT_ATTR_PORT_NO]); |
df2c07f4 JP |
1639 | vport->type = nl_attr_get_u32(a[OVS_VPORT_ATTR_TYPE]); |
1640 | vport->name = nl_attr_get_string(a[OVS_VPORT_ATTR_NAME]); | |
b063d9f0 | 1641 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { |
a24a6574 | 1642 | vport->upcall_pid = nl_attr_get(a[OVS_VPORT_ATTR_UPCALL_PID]); |
b063d9f0 | 1643 | } |
df2c07f4 JP |
1644 | if (a[OVS_VPORT_ATTR_STATS]) { |
1645 | vport->stats = nl_attr_get(a[OVS_VPORT_ATTR_STATS]); | |
1646 | } | |
df2c07f4 JP |
1647 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
1648 | vport->options = nl_attr_get(a[OVS_VPORT_ATTR_OPTIONS]); | |
1649 | vport->options_len = nl_attr_get_size(a[OVS_VPORT_ATTR_OPTIONS]); | |
c19e6535 | 1650 | } |
c19e6535 BP |
1651 | return 0; |
1652 | } | |
1653 | ||
df2c07f4 | 1654 | /* Appends to 'buf' (which must initially be empty) a "struct ovs_header" |
c19e6535 BP |
1655 | * followed by Netlink attributes corresponding to 'vport'. */ |
1656 | static void | |
1657 | dpif_linux_vport_to_ofpbuf(const struct dpif_linux_vport *vport, | |
1658 | struct ofpbuf *buf) | |
1659 | { | |
df2c07f4 | 1660 | struct ovs_header *ovs_header; |
f0fef760 | 1661 | |
df2c07f4 | 1662 | nl_msg_put_genlmsghdr(buf, 0, ovs_vport_family, NLM_F_REQUEST | NLM_F_ECHO, |
69685a88 | 1663 | vport->cmd, OVS_VPORT_VERSION); |
c19e6535 | 1664 | |
df2c07f4 JP |
1665 | ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header); |
1666 | ovs_header->dp_ifindex = vport->dp_ifindex; | |
c19e6535 | 1667 | |
4e022ec0 AW |
1668 | if (vport->port_no != ODPP_NONE) { |
1669 | nl_msg_put_odp_port(buf, OVS_VPORT_ATTR_PORT_NO, vport->port_no); | |
c19e6535 BP |
1670 | } |
1671 | ||
df2c07f4 JP |
1672 | if (vport->type != OVS_VPORT_TYPE_UNSPEC) { |
1673 | nl_msg_put_u32(buf, OVS_VPORT_ATTR_TYPE, vport->type); | |
c19e6535 BP |
1674 | } |
1675 | ||
1676 | if (vport->name) { | |
df2c07f4 | 1677 | nl_msg_put_string(buf, OVS_VPORT_ATTR_NAME, vport->name); |
c19e6535 BP |
1678 | } |
1679 | ||
a24a6574 BP |
1680 | if (vport->upcall_pid) { |
1681 | nl_msg_put_u32(buf, OVS_VPORT_ATTR_UPCALL_PID, *vport->upcall_pid); | |
1682 | } | |
b063d9f0 | 1683 | |
c19e6535 | 1684 | if (vport->stats) { |
df2c07f4 | 1685 | nl_msg_put_unspec(buf, OVS_VPORT_ATTR_STATS, |
c19e6535 BP |
1686 | vport->stats, sizeof *vport->stats); |
1687 | } | |
1688 | ||
c19e6535 | 1689 | if (vport->options) { |
df2c07f4 | 1690 | nl_msg_put_nested(buf, OVS_VPORT_ATTR_OPTIONS, |
c19e6535 BP |
1691 | vport->options, vport->options_len); |
1692 | } | |
c19e6535 BP |
1693 | } |
1694 | ||
1695 | /* Clears 'vport' to "empty" values. */ | |
1696 | void | |
1697 | dpif_linux_vport_init(struct dpif_linux_vport *vport) | |
1698 | { | |
1699 | memset(vport, 0, sizeof *vport); | |
4e022ec0 | 1700 | vport->port_no = ODPP_NONE; |
c19e6535 BP |
1701 | } |
1702 | ||
1703 | /* Executes 'request' in the kernel datapath. If the command fails, returns a | |
1704 | * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0 | |
1705 | * without doing anything else. If 'reply' and 'bufp' are nonnull, then the | |
df2c07f4 | 1706 | * result of the command is expected to be an ovs_vport also, which is decoded |
c19e6535 BP |
1707 | * and stored in '*reply' and '*bufp'. The caller must free '*bufp' when the |
1708 | * reply is no longer needed ('reply' will contain pointers into '*bufp'). */ | |
1709 | int | |
1710 | dpif_linux_vport_transact(const struct dpif_linux_vport *request, | |
1711 | struct dpif_linux_vport *reply, | |
1712 | struct ofpbuf **bufp) | |
1713 | { | |
f0fef760 | 1714 | struct ofpbuf *request_buf; |
c19e6535 BP |
1715 | int error; |
1716 | ||
cb22974d | 1717 | ovs_assert((reply != NULL) == (bufp != NULL)); |
c19e6535 | 1718 | |
42bb6c72 BP |
1719 | error = dpif_linux_init(); |
1720 | if (error) { | |
1721 | if (reply) { | |
1722 | *bufp = NULL; | |
1723 | dpif_linux_vport_init(reply); | |
1724 | } | |
1725 | return error; | |
1726 | } | |
1727 | ||
f0fef760 BP |
1728 | request_buf = ofpbuf_new(1024); |
1729 | dpif_linux_vport_to_ofpbuf(request, request_buf); | |
a88b4e04 | 1730 | error = nl_transact(NETLINK_GENERIC, request_buf, bufp); |
f0fef760 | 1731 | ofpbuf_delete(request_buf); |
c19e6535 | 1732 | |
f0fef760 BP |
1733 | if (reply) { |
1734 | if (!error) { | |
1735 | error = dpif_linux_vport_from_ofpbuf(reply, *bufp); | |
1736 | } | |
c19e6535 | 1737 | if (error) { |
f0fef760 BP |
1738 | dpif_linux_vport_init(reply); |
1739 | ofpbuf_delete(*bufp); | |
1740 | *bufp = NULL; | |
c19e6535 | 1741 | } |
c19e6535 BP |
1742 | } |
1743 | return error; | |
1744 | } | |
1745 | ||
1746 | /* Obtains information about the kernel vport named 'name' and stores it into | |
1747 | * '*reply' and '*bufp'. The caller must free '*bufp' when the reply is no | |
1748 | * longer needed ('reply' will contain pointers into '*bufp'). */ | |
1749 | int | |
1750 | dpif_linux_vport_get(const char *name, struct dpif_linux_vport *reply, | |
1751 | struct ofpbuf **bufp) | |
1752 | { | |
1753 | struct dpif_linux_vport request; | |
1754 | ||
1755 | dpif_linux_vport_init(&request); | |
df2c07f4 | 1756 | request.cmd = OVS_VPORT_CMD_GET; |
c19e6535 BP |
1757 | request.name = name; |
1758 | ||
1759 | return dpif_linux_vport_transact(&request, reply, bufp); | |
1760 | } | |
d6569377 | 1761 | \f |
df2c07f4 | 1762 | /* Parses the contents of 'buf', which contains a "struct ovs_header" followed |
aaff4b55 BP |
1763 | * by Netlink attributes, into 'dp'. Returns 0 if successful, otherwise a |
1764 | * positive errno value. | |
d6569377 BP |
1765 | * |
1766 | * 'dp' will contain pointers into 'buf', so the caller should not free 'buf' | |
1767 | * while 'dp' is still in use. */ | |
1768 | static int | |
1769 | dpif_linux_dp_from_ofpbuf(struct dpif_linux_dp *dp, const struct ofpbuf *buf) | |
1770 | { | |
df2c07f4 JP |
1771 | static const struct nl_policy ovs_datapath_policy[] = { |
1772 | [OVS_DP_ATTR_NAME] = { .type = NL_A_STRING, .max_len = IFNAMSIZ }, | |
f7df9823 | 1773 | [OVS_DP_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_dp_stats), |
d6569377 | 1774 | .optional = true }, |
d6569377 BP |
1775 | }; |
1776 | ||
df2c07f4 JP |
1777 | struct nlattr *a[ARRAY_SIZE(ovs_datapath_policy)]; |
1778 | struct ovs_header *ovs_header; | |
aaff4b55 BP |
1779 | struct nlmsghdr *nlmsg; |
1780 | struct genlmsghdr *genl; | |
1781 | struct ofpbuf b; | |
d6569377 BP |
1782 | |
1783 | dpif_linux_dp_init(dp); | |
1784 | ||
aaff4b55 BP |
1785 | ofpbuf_use_const(&b, buf->data, buf->size); |
1786 | nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); | |
1787 | genl = ofpbuf_try_pull(&b, sizeof *genl); | |
df2c07f4 JP |
1788 | ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); |
1789 | if (!nlmsg || !genl || !ovs_header | |
1790 | || nlmsg->nlmsg_type != ovs_datapath_family | |
1791 | || !nl_policy_parse(&b, 0, ovs_datapath_policy, a, | |
1792 | ARRAY_SIZE(ovs_datapath_policy))) { | |
d6569377 BP |
1793 | return EINVAL; |
1794 | } | |
d6569377 | 1795 | |
aaff4b55 | 1796 | dp->cmd = genl->cmd; |
df2c07f4 JP |
1797 | dp->dp_ifindex = ovs_header->dp_ifindex; |
1798 | dp->name = nl_attr_get_string(a[OVS_DP_ATTR_NAME]); | |
1799 | if (a[OVS_DP_ATTR_STATS]) { | |
d6569377 BP |
1800 | /* Can't use structure assignment because Netlink doesn't ensure |
1801 | * sufficient alignment for 64-bit members. */ | |
df2c07f4 | 1802 | memcpy(&dp->stats, nl_attr_get(a[OVS_DP_ATTR_STATS]), |
d6569377 BP |
1803 | sizeof dp->stats); |
1804 | } | |
982b8810 | 1805 | |
d6569377 BP |
1806 | return 0; |
1807 | } | |
1808 | ||
aaff4b55 | 1809 | /* Appends to 'buf' the Generic Netlink message described by 'dp'. */ |
d6569377 BP |
1810 | static void |
1811 | dpif_linux_dp_to_ofpbuf(const struct dpif_linux_dp *dp, struct ofpbuf *buf) | |
1812 | { | |
df2c07f4 | 1813 | struct ovs_header *ovs_header; |
d6569377 | 1814 | |
df2c07f4 | 1815 | nl_msg_put_genlmsghdr(buf, 0, ovs_datapath_family, |
69685a88 JG |
1816 | NLM_F_REQUEST | NLM_F_ECHO, dp->cmd, |
1817 | OVS_DATAPATH_VERSION); | |
aaff4b55 | 1818 | |
df2c07f4 JP |
1819 | ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header); |
1820 | ovs_header->dp_ifindex = dp->dp_ifindex; | |
d6569377 BP |
1821 | |
1822 | if (dp->name) { | |
df2c07f4 | 1823 | nl_msg_put_string(buf, OVS_DP_ATTR_NAME, dp->name); |
d6569377 BP |
1824 | } |
1825 | ||
a24a6574 BP |
1826 | if (dp->upcall_pid) { |
1827 | nl_msg_put_u32(buf, OVS_DP_ATTR_UPCALL_PID, *dp->upcall_pid); | |
1828 | } | |
b063d9f0 | 1829 | |
df2c07f4 | 1830 | /* Skip OVS_DP_ATTR_STATS since we never have a reason to serialize it. */ |
d6569377 BP |
1831 | } |
1832 | ||
1833 | /* Clears 'dp' to "empty" values. */ | |
d3d8f1f7 | 1834 | static void |
d6569377 BP |
1835 | dpif_linux_dp_init(struct dpif_linux_dp *dp) |
1836 | { | |
1837 | memset(dp, 0, sizeof *dp); | |
d6569377 BP |
1838 | } |
1839 | ||
aaff4b55 BP |
1840 | static void |
1841 | dpif_linux_dp_dump_start(struct nl_dump *dump) | |
1842 | { | |
1843 | struct dpif_linux_dp request; | |
1844 | struct ofpbuf *buf; | |
1845 | ||
1846 | dpif_linux_dp_init(&request); | |
df2c07f4 | 1847 | request.cmd = OVS_DP_CMD_GET; |
aaff4b55 BP |
1848 | |
1849 | buf = ofpbuf_new(1024); | |
1850 | dpif_linux_dp_to_ofpbuf(&request, buf); | |
a88b4e04 | 1851 | nl_dump_start(dump, NETLINK_GENERIC, buf); |
aaff4b55 BP |
1852 | ofpbuf_delete(buf); |
1853 | } | |
1854 | ||
d6569377 BP |
1855 | /* Executes 'request' in the kernel datapath. If the command fails, returns a |
1856 | * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0 | |
1857 | * without doing anything else. If 'reply' and 'bufp' are nonnull, then the | |
aaff4b55 BP |
1858 | * result of the command is expected to be of the same form, which is decoded |
1859 | * and stored in '*reply' and '*bufp'. The caller must free '*bufp' when the | |
1860 | * reply is no longer needed ('reply' will contain pointers into '*bufp'). */ | |
d3d8f1f7 | 1861 | static int |
d6569377 BP |
1862 | dpif_linux_dp_transact(const struct dpif_linux_dp *request, |
1863 | struct dpif_linux_dp *reply, struct ofpbuf **bufp) | |
1864 | { | |
aaff4b55 | 1865 | struct ofpbuf *request_buf; |
d6569377 | 1866 | int error; |
d6569377 | 1867 | |
cb22974d | 1868 | ovs_assert((reply != NULL) == (bufp != NULL)); |
d6569377 | 1869 | |
aaff4b55 BP |
1870 | request_buf = ofpbuf_new(1024); |
1871 | dpif_linux_dp_to_ofpbuf(request, request_buf); | |
a88b4e04 | 1872 | error = nl_transact(NETLINK_GENERIC, request_buf, bufp); |
aaff4b55 | 1873 | ofpbuf_delete(request_buf); |
d6569377 | 1874 | |
aaff4b55 BP |
1875 | if (reply) { |
1876 | if (!error) { | |
1877 | error = dpif_linux_dp_from_ofpbuf(reply, *bufp); | |
1878 | } | |
d6569377 | 1879 | if (error) { |
aaff4b55 BP |
1880 | dpif_linux_dp_init(reply); |
1881 | ofpbuf_delete(*bufp); | |
1882 | *bufp = NULL; | |
d6569377 | 1883 | } |
d6569377 BP |
1884 | } |
1885 | return error; | |
1886 | } | |
1887 | ||
1888 | /* Obtains information about 'dpif_' and stores it into '*reply' and '*bufp'. | |
1889 | * The caller must free '*bufp' when the reply is no longer needed ('reply' | |
1890 | * will contain pointers into '*bufp'). */ | |
d3d8f1f7 | 1891 | static int |
d6569377 BP |
1892 | dpif_linux_dp_get(const struct dpif *dpif_, struct dpif_linux_dp *reply, |
1893 | struct ofpbuf **bufp) | |
1894 | { | |
1895 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
1896 | struct dpif_linux_dp request; | |
1897 | ||
1898 | dpif_linux_dp_init(&request); | |
df2c07f4 | 1899 | request.cmd = OVS_DP_CMD_GET; |
254f2dc8 | 1900 | request.dp_ifindex = dpif->dp_ifindex; |
d6569377 BP |
1901 | |
1902 | return dpif_linux_dp_transact(&request, reply, bufp); | |
1903 | } | |
1904 | \f | |
df2c07f4 | 1905 | /* Parses the contents of 'buf', which contains a "struct ovs_header" followed |
37a1300c | 1906 | * by Netlink attributes, into 'flow'. Returns 0 if successful, otherwise a |
d6569377 BP |
1907 | * positive errno value. |
1908 | * | |
1909 | * 'flow' will contain pointers into 'buf', so the caller should not free 'buf' | |
1910 | * while 'flow' is still in use. */ | |
1911 | static int | |
1912 | dpif_linux_flow_from_ofpbuf(struct dpif_linux_flow *flow, | |
1913 | const struct ofpbuf *buf) | |
1914 | { | |
df2c07f4 JP |
1915 | static const struct nl_policy ovs_flow_policy[] = { |
1916 | [OVS_FLOW_ATTR_KEY] = { .type = NL_A_NESTED }, | |
e6cc0bab | 1917 | [OVS_FLOW_ATTR_MASK] = { .type = NL_A_NESTED, .optional = true }, |
df2c07f4 | 1918 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NL_A_NESTED, .optional = true }, |
f7df9823 | 1919 | [OVS_FLOW_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_flow_stats), |
d6569377 | 1920 | .optional = true }, |
df2c07f4 JP |
1921 | [OVS_FLOW_ATTR_TCP_FLAGS] = { .type = NL_A_U8, .optional = true }, |
1922 | [OVS_FLOW_ATTR_USED] = { .type = NL_A_U64, .optional = true }, | |
1923 | /* The kernel never uses OVS_FLOW_ATTR_CLEAR. */ | |
d6569377 BP |
1924 | }; |
1925 | ||
df2c07f4 JP |
1926 | struct nlattr *a[ARRAY_SIZE(ovs_flow_policy)]; |
1927 | struct ovs_header *ovs_header; | |
37a1300c BP |
1928 | struct nlmsghdr *nlmsg; |
1929 | struct genlmsghdr *genl; | |
1930 | struct ofpbuf b; | |
d6569377 BP |
1931 | |
1932 | dpif_linux_flow_init(flow); | |
1933 | ||
37a1300c BP |
1934 | ofpbuf_use_const(&b, buf->data, buf->size); |
1935 | nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); | |
1936 | genl = ofpbuf_try_pull(&b, sizeof *genl); | |
df2c07f4 JP |
1937 | ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); |
1938 | if (!nlmsg || !genl || !ovs_header | |
1939 | || nlmsg->nlmsg_type != ovs_flow_family | |
1940 | || !nl_policy_parse(&b, 0, ovs_flow_policy, a, | |
1941 | ARRAY_SIZE(ovs_flow_policy))) { | |
d6569377 BP |
1942 | return EINVAL; |
1943 | } | |
d6569377 | 1944 | |
37a1300c | 1945 | flow->nlmsg_flags = nlmsg->nlmsg_flags; |
df2c07f4 JP |
1946 | flow->dp_ifindex = ovs_header->dp_ifindex; |
1947 | flow->key = nl_attr_get(a[OVS_FLOW_ATTR_KEY]); | |
1948 | flow->key_len = nl_attr_get_size(a[OVS_FLOW_ATTR_KEY]); | |
e6cc0bab AZ |
1949 | |
1950 | if (a[OVS_FLOW_ATTR_MASK]) { | |
1951 | flow->mask = nl_attr_get(a[OVS_FLOW_ATTR_MASK]); | |
1952 | flow->mask_len = nl_attr_get_size(a[OVS_FLOW_ATTR_MASK]); | |
1953 | } | |
df2c07f4 JP |
1954 | if (a[OVS_FLOW_ATTR_ACTIONS]) { |
1955 | flow->actions = nl_attr_get(a[OVS_FLOW_ATTR_ACTIONS]); | |
1956 | flow->actions_len = nl_attr_get_size(a[OVS_FLOW_ATTR_ACTIONS]); | |
d6569377 | 1957 | } |
df2c07f4 JP |
1958 | if (a[OVS_FLOW_ATTR_STATS]) { |
1959 | flow->stats = nl_attr_get(a[OVS_FLOW_ATTR_STATS]); | |
d6569377 | 1960 | } |
df2c07f4 JP |
1961 | if (a[OVS_FLOW_ATTR_TCP_FLAGS]) { |
1962 | flow->tcp_flags = nl_attr_get(a[OVS_FLOW_ATTR_TCP_FLAGS]); | |
d6569377 | 1963 | } |
df2c07f4 JP |
1964 | if (a[OVS_FLOW_ATTR_USED]) { |
1965 | flow->used = nl_attr_get(a[OVS_FLOW_ATTR_USED]); | |
9e980142 | 1966 | } |
d6569377 BP |
1967 | return 0; |
1968 | } | |
1969 | ||
df2c07f4 | 1970 | /* Appends to 'buf' (which must initially be empty) a "struct ovs_header" |
d6569377 BP |
1971 | * followed by Netlink attributes corresponding to 'flow'. */ |
1972 | static void | |
1973 | dpif_linux_flow_to_ofpbuf(const struct dpif_linux_flow *flow, | |
1974 | struct ofpbuf *buf) | |
1975 | { | |
df2c07f4 | 1976 | struct ovs_header *ovs_header; |
d6569377 | 1977 | |
df2c07f4 | 1978 | nl_msg_put_genlmsghdr(buf, 0, ovs_flow_family, |
30b44744 | 1979 | NLM_F_REQUEST | flow->nlmsg_flags, |
69685a88 | 1980 | flow->cmd, OVS_FLOW_VERSION); |
37a1300c | 1981 | |
df2c07f4 JP |
1982 | ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header); |
1983 | ovs_header->dp_ifindex = flow->dp_ifindex; | |
d6569377 BP |
1984 | |
1985 | if (flow->key_len) { | |
df2c07f4 | 1986 | nl_msg_put_unspec(buf, OVS_FLOW_ATTR_KEY, flow->key, flow->key_len); |
d6569377 BP |
1987 | } |
1988 | ||
e6cc0bab AZ |
1989 | if (flow->mask_len) { |
1990 | nl_msg_put_unspec(buf, OVS_FLOW_ATTR_MASK, flow->mask, flow->mask_len); | |
1991 | } | |
1992 | ||
d2a23af2 | 1993 | if (flow->actions || flow->actions_len) { |
df2c07f4 | 1994 | nl_msg_put_unspec(buf, OVS_FLOW_ATTR_ACTIONS, |
d6569377 BP |
1995 | flow->actions, flow->actions_len); |
1996 | } | |
1997 | ||
1998 | /* We never need to send these to the kernel. */ | |
cb22974d BP |
1999 | ovs_assert(!flow->stats); |
2000 | ovs_assert(!flow->tcp_flags); | |
2001 | ovs_assert(!flow->used); | |
d6569377 BP |
2002 | |
2003 | if (flow->clear) { | |
df2c07f4 | 2004 | nl_msg_put_flag(buf, OVS_FLOW_ATTR_CLEAR); |
d6569377 | 2005 | } |
d6569377 BP |
2006 | } |
2007 | ||
2008 | /* Clears 'flow' to "empty" values. */ | |
d3d8f1f7 | 2009 | static void |
d6569377 BP |
2010 | dpif_linux_flow_init(struct dpif_linux_flow *flow) |
2011 | { | |
2012 | memset(flow, 0, sizeof *flow); | |
2013 | } | |
2014 | ||
2015 | /* Executes 'request' in the kernel datapath. If the command fails, returns a | |
2016 | * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0 | |
2017 | * without doing anything else. If 'reply' and 'bufp' are nonnull, then the | |
37a1300c BP |
2018 | * result of the command is expected to be a flow also, which is decoded and |
2019 | * stored in '*reply' and '*bufp'. The caller must free '*bufp' when the reply | |
2020 | * is no longer needed ('reply' will contain pointers into '*bufp'). */ | |
d3d8f1f7 | 2021 | static int |
30b44744 | 2022 | dpif_linux_flow_transact(struct dpif_linux_flow *request, |
d6569377 BP |
2023 | struct dpif_linux_flow *reply, struct ofpbuf **bufp) |
2024 | { | |
37a1300c | 2025 | struct ofpbuf *request_buf; |
d6569377 | 2026 | int error; |
d6569377 | 2027 | |
cb22974d | 2028 | ovs_assert((reply != NULL) == (bufp != NULL)); |
d6569377 | 2029 | |
30b44744 BP |
2030 | if (reply) { |
2031 | request->nlmsg_flags |= NLM_F_ECHO; | |
2032 | } | |
2033 | ||
37a1300c BP |
2034 | request_buf = ofpbuf_new(1024); |
2035 | dpif_linux_flow_to_ofpbuf(request, request_buf); | |
a88b4e04 | 2036 | error = nl_transact(NETLINK_GENERIC, request_buf, bufp); |
37a1300c | 2037 | ofpbuf_delete(request_buf); |
d6569377 | 2038 | |
37a1300c BP |
2039 | if (reply) { |
2040 | if (!error) { | |
2041 | error = dpif_linux_flow_from_ofpbuf(reply, *bufp); | |
2042 | } | |
d6569377 | 2043 | if (error) { |
37a1300c BP |
2044 | dpif_linux_flow_init(reply); |
2045 | ofpbuf_delete(*bufp); | |
2046 | *bufp = NULL; | |
d6569377 | 2047 | } |
d6569377 BP |
2048 | } |
2049 | return error; | |
2050 | } | |
2051 | ||
2052 | static void | |
2053 | dpif_linux_flow_get_stats(const struct dpif_linux_flow *flow, | |
2054 | struct dpif_flow_stats *stats) | |
2055 | { | |
2056 | if (flow->stats) { | |
2057 | stats->n_packets = get_unaligned_u64(&flow->stats->n_packets); | |
2058 | stats->n_bytes = get_unaligned_u64(&flow->stats->n_bytes); | |
2059 | } else { | |
2060 | stats->n_packets = 0; | |
2061 | stats->n_bytes = 0; | |
2062 | } | |
0e70cdcb | 2063 | stats->used = flow->used ? get_32aligned_u64(flow->used) : 0; |
d6569377 BP |
2064 | stats->tcp_flags = flow->tcp_flags ? *flow->tcp_flags : 0; |
2065 | } | |
14b4d2f9 | 2066 | \f |
14b4d2f9 BP |
2067 | /* Logs information about a packet that was recently lost in 'ch' (in |
2068 | * 'dpif_'). */ | |
2069 | static void | |
2070 | report_loss(struct dpif *dpif_, struct dpif_channel *ch) | |
2071 | { | |
2072 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
2073 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 5); | |
14b4d2f9 BP |
2074 | struct ds s; |
2075 | ||
8d675c5a | 2076 | if (VLOG_DROP_WARN(&rl)) { |
14b4d2f9 BP |
2077 | return; |
2078 | } | |
2079 | ||
2080 | ds_init(&s); | |
2081 | if (ch->last_poll != LLONG_MIN) { | |
2082 | ds_put_format(&s, " (last polled %lld ms ago)", | |
2083 | time_msec() - ch->last_poll); | |
2084 | } | |
14b4d2f9 | 2085 | |
8d0abb5e BP |
2086 | VLOG_WARN("%s: lost packet on channel %td%s", |
2087 | dpif_name(dpif_), ch - dpif->channels, ds_cstr(&s)); | |
14b4d2f9 BP |
2088 | ds_destroy(&s); |
2089 | } |