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1 | /* | |
2 | * Copyright (c) 2008-2018 Nicira, Inc. | |
3 | * | |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | #include <config.h> | |
18 | ||
19 | #include "dpif-netlink.h" | |
20 | ||
21 | #include <ctype.h> | |
22 | #include <errno.h> | |
23 | #include <fcntl.h> | |
24 | #include <inttypes.h> | |
25 | #include <net/if.h> | |
26 | #include <linux/types.h> | |
27 | #include <linux/pkt_sched.h> | |
28 | #include <poll.h> | |
29 | #include <stdlib.h> | |
30 | #include <strings.h> | |
31 | #include <sys/epoll.h> | |
32 | #include <sys/stat.h> | |
33 | #include <unistd.h> | |
34 | ||
35 | #include "bitmap.h" | |
36 | #include "dpif-netlink-rtnl.h" | |
37 | #include "dpif-provider.h" | |
38 | #include "fat-rwlock.h" | |
39 | #include "flow.h" | |
40 | #include "netdev-linux.h" | |
41 | #include "netdev-offload.h" | |
42 | #include "netdev-provider.h" | |
43 | #include "netdev-vport.h" | |
44 | #include "netdev.h" | |
45 | #include "netlink-conntrack.h" | |
46 | #include "netlink-notifier.h" | |
47 | #include "netlink-socket.h" | |
48 | #include "netlink.h" | |
49 | #include "netnsid.h" | |
50 | #include "odp-util.h" | |
51 | #include "openvswitch/dynamic-string.h" | |
52 | #include "openvswitch/flow.h" | |
53 | #include "openvswitch/hmap.h" | |
54 | #include "openvswitch/match.h" | |
55 | #include "openvswitch/ofpbuf.h" | |
56 | #include "openvswitch/poll-loop.h" | |
57 | #include "openvswitch/shash.h" | |
58 | #include "openvswitch/thread.h" | |
59 | #include "openvswitch/vlog.h" | |
60 | #include "packets.h" | |
61 | #include "random.h" | |
62 | #include "sset.h" | |
63 | #include "timeval.h" | |
64 | #include "unaligned.h" | |
65 | #include "util.h" | |
66 | ||
67 | VLOG_DEFINE_THIS_MODULE(dpif_netlink); | |
68 | #ifdef _WIN32 | |
69 | #include "wmi.h" | |
70 | enum { WINDOWS = 1 }; | |
71 | #else | |
72 | enum { WINDOWS = 0 }; | |
73 | #endif | |
74 | enum { MAX_PORTS = USHRT_MAX }; | |
75 | ||
76 | /* This ethtool flag was introduced in Linux 2.6.24, so it might be | |
77 | * missing if we have old headers. */ | |
78 | #define ETH_FLAG_LRO (1 << 15) /* LRO is enabled */ | |
79 | ||
80 | #define FLOW_DUMP_MAX_BATCH 50 | |
81 | #define OPERATE_MAX_OPS 50 | |
82 | ||
83 | #ifndef EPOLLEXCLUSIVE | |
84 | #define EPOLLEXCLUSIVE (1u << 28) | |
85 | #endif | |
86 | ||
87 | struct dpif_netlink_dp { | |
88 | /* Generic Netlink header. */ | |
89 | uint8_t cmd; | |
90 | ||
91 | /* struct ovs_header. */ | |
92 | int dp_ifindex; | |
93 | ||
94 | /* Attributes. */ | |
95 | const char *name; /* OVS_DP_ATTR_NAME. */ | |
96 | const uint32_t *upcall_pid; /* OVS_DP_ATTR_UPCALL_PID. */ | |
97 | uint32_t user_features; /* OVS_DP_ATTR_USER_FEATURES */ | |
98 | const struct ovs_dp_stats *stats; /* OVS_DP_ATTR_STATS. */ | |
99 | const struct ovs_dp_megaflow_stats *megaflow_stats; | |
100 | /* OVS_DP_ATTR_MEGAFLOW_STATS.*/ | |
101 | }; | |
102 | ||
103 | static void dpif_netlink_dp_init(struct dpif_netlink_dp *); | |
104 | static int dpif_netlink_dp_from_ofpbuf(struct dpif_netlink_dp *, | |
105 | const struct ofpbuf *); | |
106 | static void dpif_netlink_dp_dump_start(struct nl_dump *); | |
107 | static int dpif_netlink_dp_transact(const struct dpif_netlink_dp *request, | |
108 | struct dpif_netlink_dp *reply, | |
109 | struct ofpbuf **bufp); | |
110 | static int dpif_netlink_dp_get(const struct dpif *, | |
111 | struct dpif_netlink_dp *reply, | |
112 | struct ofpbuf **bufp); | |
113 | static int | |
114 | dpif_netlink_set_features(struct dpif *dpif_, uint32_t new_features); | |
115 | ||
116 | struct dpif_netlink_flow { | |
117 | /* Generic Netlink header. */ | |
118 | uint8_t cmd; | |
119 | ||
120 | /* struct ovs_header. */ | |
121 | unsigned int nlmsg_flags; | |
122 | int dp_ifindex; | |
123 | ||
124 | /* Attributes. | |
125 | * | |
126 | * The 'stats' member points to 64-bit data that might only be aligned on | |
127 | * 32-bit boundaries, so get_unaligned_u64() should be used to access its | |
128 | * values. | |
129 | * | |
130 | * If 'actions' is nonnull then OVS_FLOW_ATTR_ACTIONS will be included in | |
131 | * the Netlink version of the command, even if actions_len is zero. */ | |
132 | const struct nlattr *key; /* OVS_FLOW_ATTR_KEY. */ | |
133 | size_t key_len; | |
134 | const struct nlattr *mask; /* OVS_FLOW_ATTR_MASK. */ | |
135 | size_t mask_len; | |
136 | const struct nlattr *actions; /* OVS_FLOW_ATTR_ACTIONS. */ | |
137 | size_t actions_len; | |
138 | ovs_u128 ufid; /* OVS_FLOW_ATTR_FLOW_ID. */ | |
139 | bool ufid_present; /* Is there a UFID? */ | |
140 | bool ufid_terse; /* Skip serializing key/mask/acts? */ | |
141 | const struct ovs_flow_stats *stats; /* OVS_FLOW_ATTR_STATS. */ | |
142 | const uint8_t *tcp_flags; /* OVS_FLOW_ATTR_TCP_FLAGS. */ | |
143 | const ovs_32aligned_u64 *used; /* OVS_FLOW_ATTR_USED. */ | |
144 | bool clear; /* OVS_FLOW_ATTR_CLEAR. */ | |
145 | bool probe; /* OVS_FLOW_ATTR_PROBE. */ | |
146 | }; | |
147 | ||
148 | static void dpif_netlink_flow_init(struct dpif_netlink_flow *); | |
149 | static int dpif_netlink_flow_from_ofpbuf(struct dpif_netlink_flow *, | |
150 | const struct ofpbuf *); | |
151 | static void dpif_netlink_flow_to_ofpbuf(const struct dpif_netlink_flow *, | |
152 | struct ofpbuf *); | |
153 | static int dpif_netlink_flow_transact(struct dpif_netlink_flow *request, | |
154 | struct dpif_netlink_flow *reply, | |
155 | struct ofpbuf **bufp); | |
156 | static void dpif_netlink_flow_get_stats(const struct dpif_netlink_flow *, | |
157 | struct dpif_flow_stats *); | |
158 | static void dpif_netlink_flow_to_dpif_flow(struct dpif_flow *, | |
159 | const struct dpif_netlink_flow *); | |
160 | ||
161 | /* One of the dpif channels between the kernel and userspace. */ | |
162 | struct dpif_channel { | |
163 | struct nl_sock *sock; /* Netlink socket. */ | |
164 | long long int last_poll; /* Last time this channel was polled. */ | |
165 | }; | |
166 | ||
167 | #ifdef _WIN32 | |
168 | #define VPORT_SOCK_POOL_SIZE 1 | |
169 | /* On Windows, there is no native support for epoll. There are equivalent | |
170 | * interfaces though, that are not used currently. For simpicity, a pool of | |
171 | * netlink sockets is used. Each socket is represented by 'struct | |
172 | * dpif_windows_vport_sock'. Since it is a pool, multiple OVS ports may be | |
173 | * sharing the same socket. In the future, we can add a reference count and | |
174 | * such fields. */ | |
175 | struct dpif_windows_vport_sock { | |
176 | struct nl_sock *nl_sock; /* netlink socket. */ | |
177 | }; | |
178 | #endif | |
179 | ||
180 | struct dpif_handler { | |
181 | struct epoll_event *epoll_events; | |
182 | int epoll_fd; /* epoll fd that includes channel socks. */ | |
183 | int n_events; /* Num events returned by epoll_wait(). */ | |
184 | int event_offset; /* Offset into 'epoll_events'. */ | |
185 | ||
186 | #ifdef _WIN32 | |
187 | /* Pool of sockets. */ | |
188 | struct dpif_windows_vport_sock *vport_sock_pool; | |
189 | size_t last_used_pool_idx; /* Index to aid in allocating a | |
190 | socket in the pool to a port. */ | |
191 | #endif | |
192 | }; | |
193 | ||
194 | /* Datapath interface for the openvswitch Linux kernel module. */ | |
195 | struct dpif_netlink { | |
196 | struct dpif dpif; | |
197 | int dp_ifindex; | |
198 | uint32_t user_features; | |
199 | ||
200 | /* Upcall messages. */ | |
201 | struct fat_rwlock upcall_lock; | |
202 | struct dpif_handler *handlers; | |
203 | uint32_t n_handlers; /* Num of upcall handlers. */ | |
204 | struct dpif_channel *channels; /* Array of channels for each port. */ | |
205 | int uc_array_size; /* Size of 'handler->channels' and */ | |
206 | /* 'handler->epoll_events'. */ | |
207 | ||
208 | /* Change notification. */ | |
209 | struct nl_sock *port_notifier; /* vport multicast group subscriber. */ | |
210 | bool refresh_channels; | |
211 | }; | |
212 | ||
213 | static void report_loss(struct dpif_netlink *, struct dpif_channel *, | |
214 | uint32_t ch_idx, uint32_t handler_id); | |
215 | ||
216 | static struct vlog_rate_limit error_rl = VLOG_RATE_LIMIT_INIT(9999, 5); | |
217 | ||
218 | /* Generic Netlink family numbers for OVS. | |
219 | * | |
220 | * Initialized by dpif_netlink_init(). */ | |
221 | static int ovs_datapath_family; | |
222 | static int ovs_vport_family; | |
223 | static int ovs_flow_family; | |
224 | static int ovs_packet_family; | |
225 | static int ovs_meter_family; | |
226 | static int ovs_ct_limit_family; | |
227 | ||
228 | /* Generic Netlink multicast groups for OVS. | |
229 | * | |
230 | * Initialized by dpif_netlink_init(). */ | |
231 | static unsigned int ovs_vport_mcgroup; | |
232 | ||
233 | /* If true, tunnel devices are created using OVS compat/genetlink. | |
234 | * If false, tunnel devices are created with rtnetlink and using light weight | |
235 | * tunnels. If we fail to create the tunnel the rtnetlink+LWT, then we fallback | |
236 | * to using the compat interface. */ | |
237 | static bool ovs_tunnels_out_of_tree = true; | |
238 | ||
239 | static int dpif_netlink_init(void); | |
240 | static int open_dpif(const struct dpif_netlink_dp *, struct dpif **); | |
241 | static uint32_t dpif_netlink_port_get_pid(const struct dpif *, | |
242 | odp_port_t port_no); | |
243 | static void dpif_netlink_handler_uninit(struct dpif_handler *handler); | |
244 | static int dpif_netlink_refresh_channels(struct dpif_netlink *, | |
245 | uint32_t n_handlers); | |
246 | static void dpif_netlink_vport_to_ofpbuf(const struct dpif_netlink_vport *, | |
247 | struct ofpbuf *); | |
248 | static int dpif_netlink_vport_from_ofpbuf(struct dpif_netlink_vport *, | |
249 | const struct ofpbuf *); | |
250 | static int dpif_netlink_port_query__(const struct dpif_netlink *dpif, | |
251 | odp_port_t port_no, const char *port_name, | |
252 | struct dpif_port *dpif_port); | |
253 | ||
254 | static int | |
255 | create_nl_sock(struct dpif_netlink *dpif OVS_UNUSED, struct nl_sock **sockp) | |
256 | OVS_REQ_WRLOCK(dpif->upcall_lock) | |
257 | { | |
258 | #ifndef _WIN32 | |
259 | return nl_sock_create(NETLINK_GENERIC, sockp); | |
260 | #else | |
261 | /* Pick netlink sockets to use in a round-robin fashion from each | |
262 | * handler's pool of sockets. */ | |
263 | struct dpif_handler *handler = &dpif->handlers[0]; | |
264 | struct dpif_windows_vport_sock *sock_pool = handler->vport_sock_pool; | |
265 | size_t index = handler->last_used_pool_idx; | |
266 | ||
267 | /* A pool of sockets is allocated when the handler is initialized. */ | |
268 | if (sock_pool == NULL) { | |
269 | *sockp = NULL; | |
270 | return EINVAL; | |
271 | } | |
272 | ||
273 | ovs_assert(index < VPORT_SOCK_POOL_SIZE); | |
274 | *sockp = sock_pool[index].nl_sock; | |
275 | ovs_assert(*sockp); | |
276 | index = (index == VPORT_SOCK_POOL_SIZE - 1) ? 0 : index + 1; | |
277 | handler->last_used_pool_idx = index; | |
278 | return 0; | |
279 | #endif | |
280 | } | |
281 | ||
282 | static void | |
283 | close_nl_sock(struct nl_sock *sock) | |
284 | { | |
285 | #ifndef _WIN32 | |
286 | nl_sock_destroy(sock); | |
287 | #endif | |
288 | } | |
289 | ||
290 | static struct dpif_netlink * | |
291 | dpif_netlink_cast(const struct dpif *dpif) | |
292 | { | |
293 | dpif_assert_class(dpif, &dpif_netlink_class); | |
294 | return CONTAINER_OF(dpif, struct dpif_netlink, dpif); | |
295 | } | |
296 | ||
297 | static int | |
298 | dpif_netlink_enumerate(struct sset *all_dps, | |
299 | const struct dpif_class *dpif_class OVS_UNUSED) | |
300 | { | |
301 | struct nl_dump dump; | |
302 | uint64_t reply_stub[NL_DUMP_BUFSIZE / 8]; | |
303 | struct ofpbuf msg, buf; | |
304 | int error; | |
305 | ||
306 | error = dpif_netlink_init(); | |
307 | if (error) { | |
308 | return error; | |
309 | } | |
310 | ||
311 | ofpbuf_use_stub(&buf, reply_stub, sizeof reply_stub); | |
312 | dpif_netlink_dp_dump_start(&dump); | |
313 | while (nl_dump_next(&dump, &msg, &buf)) { | |
314 | struct dpif_netlink_dp dp; | |
315 | ||
316 | if (!dpif_netlink_dp_from_ofpbuf(&dp, &msg)) { | |
317 | sset_add(all_dps, dp.name); | |
318 | } | |
319 | } | |
320 | ofpbuf_uninit(&buf); | |
321 | return nl_dump_done(&dump); | |
322 | } | |
323 | ||
324 | static int | |
325 | dpif_netlink_open(const struct dpif_class *class OVS_UNUSED, const char *name, | |
326 | bool create, struct dpif **dpifp) | |
327 | { | |
328 | struct dpif_netlink_dp dp_request, dp; | |
329 | struct ofpbuf *buf; | |
330 | uint32_t upcall_pid; | |
331 | int error; | |
332 | ||
333 | error = dpif_netlink_init(); | |
334 | if (error) { | |
335 | return error; | |
336 | } | |
337 | ||
338 | /* Create or look up datapath. */ | |
339 | dpif_netlink_dp_init(&dp_request); | |
340 | upcall_pid = 0; | |
341 | dp_request.upcall_pid = &upcall_pid; | |
342 | dp_request.name = name; | |
343 | ||
344 | if (create) { | |
345 | dp_request.cmd = OVS_DP_CMD_NEW; | |
346 | } else { | |
347 | dp_request.cmd = OVS_DP_CMD_GET; | |
348 | ||
349 | error = dpif_netlink_dp_transact(&dp_request, &dp, &buf); | |
350 | if (error) { | |
351 | return error; | |
352 | } | |
353 | dp_request.user_features = dp.user_features; | |
354 | ofpbuf_delete(buf); | |
355 | ||
356 | /* Use OVS_DP_CMD_SET to report user features */ | |
357 | dp_request.cmd = OVS_DP_CMD_SET; | |
358 | } | |
359 | ||
360 | dp_request.user_features |= OVS_DP_F_UNALIGNED; | |
361 | dp_request.user_features |= OVS_DP_F_VPORT_PIDS; | |
362 | error = dpif_netlink_dp_transact(&dp_request, &dp, &buf); | |
363 | if (error) { | |
364 | return error; | |
365 | } | |
366 | ||
367 | error = open_dpif(&dp, dpifp); | |
368 | dpif_netlink_set_features(*dpifp, OVS_DP_F_TC_RECIRC_SHARING); | |
369 | ofpbuf_delete(buf); | |
370 | ||
371 | return error; | |
372 | } | |
373 | ||
374 | static int | |
375 | open_dpif(const struct dpif_netlink_dp *dp, struct dpif **dpifp) | |
376 | { | |
377 | struct dpif_netlink *dpif; | |
378 | ||
379 | dpif = xzalloc(sizeof *dpif); | |
380 | dpif->port_notifier = NULL; | |
381 | fat_rwlock_init(&dpif->upcall_lock); | |
382 | ||
383 | dpif_init(&dpif->dpif, &dpif_netlink_class, dp->name, | |
384 | dp->dp_ifindex, dp->dp_ifindex); | |
385 | ||
386 | dpif->dp_ifindex = dp->dp_ifindex; | |
387 | dpif->user_features = dp->user_features; | |
388 | *dpifp = &dpif->dpif; | |
389 | ||
390 | return 0; | |
391 | } | |
392 | ||
393 | #ifdef _WIN32 | |
394 | static void | |
395 | vport_delete_sock_pool(struct dpif_handler *handler) | |
396 | OVS_REQ_WRLOCK(dpif->upcall_lock) | |
397 | { | |
398 | if (handler->vport_sock_pool) { | |
399 | uint32_t i; | |
400 | struct dpif_windows_vport_sock *sock_pool = | |
401 | handler->vport_sock_pool; | |
402 | ||
403 | for (i = 0; i < VPORT_SOCK_POOL_SIZE; i++) { | |
404 | if (sock_pool[i].nl_sock) { | |
405 | nl_sock_unsubscribe_packets(sock_pool[i].nl_sock); | |
406 | nl_sock_destroy(sock_pool[i].nl_sock); | |
407 | sock_pool[i].nl_sock = NULL; | |
408 | } | |
409 | } | |
410 | ||
411 | free(handler->vport_sock_pool); | |
412 | handler->vport_sock_pool = NULL; | |
413 | } | |
414 | } | |
415 | ||
416 | static int | |
417 | vport_create_sock_pool(struct dpif_handler *handler) | |
418 | OVS_REQ_WRLOCK(dpif->upcall_lock) | |
419 | { | |
420 | struct dpif_windows_vport_sock *sock_pool; | |
421 | size_t i; | |
422 | int error = 0; | |
423 | ||
424 | sock_pool = xzalloc(VPORT_SOCK_POOL_SIZE * sizeof *sock_pool); | |
425 | for (i = 0; i < VPORT_SOCK_POOL_SIZE; i++) { | |
426 | error = nl_sock_create(NETLINK_GENERIC, &sock_pool[i].nl_sock); | |
427 | if (error) { | |
428 | goto error; | |
429 | } | |
430 | ||
431 | /* Enable the netlink socket to receive packets. This is equivalent to | |
432 | * calling nl_sock_join_mcgroup() to receive events. */ | |
433 | error = nl_sock_subscribe_packets(sock_pool[i].nl_sock); | |
434 | if (error) { | |
435 | goto error; | |
436 | } | |
437 | } | |
438 | ||
439 | handler->vport_sock_pool = sock_pool; | |
440 | handler->last_used_pool_idx = 0; | |
441 | return 0; | |
442 | ||
443 | error: | |
444 | vport_delete_sock_pool(handler); | |
445 | return error; | |
446 | } | |
447 | #endif /* _WIN32 */ | |
448 | ||
449 | /* Given the port number 'port_idx', extracts the pid of netlink socket | |
450 | * associated to the port and assigns it to 'upcall_pid'. */ | |
451 | static bool | |
452 | vport_get_pid(struct dpif_netlink *dpif, uint32_t port_idx, | |
453 | uint32_t *upcall_pid) | |
454 | { | |
455 | /* Since the nl_sock can only be assigned in either all | |
456 | * or none "dpif" channels, the following check | |
457 | * would suffice. */ | |
458 | if (!dpif->channels[port_idx].sock) { | |
459 | return false; | |
460 | } | |
461 | ovs_assert(!WINDOWS || dpif->n_handlers <= 1); | |
462 | ||
463 | *upcall_pid = nl_sock_pid(dpif->channels[port_idx].sock); | |
464 | ||
465 | return true; | |
466 | } | |
467 | ||
468 | static int | |
469 | vport_add_channel(struct dpif_netlink *dpif, odp_port_t port_no, | |
470 | struct nl_sock *sock) | |
471 | { | |
472 | struct epoll_event event; | |
473 | uint32_t port_idx = odp_to_u32(port_no); | |
474 | size_t i; | |
475 | int error; | |
476 | ||
477 | if (dpif->handlers == NULL) { | |
478 | close_nl_sock(sock); | |
479 | return 0; | |
480 | } | |
481 | ||
482 | /* We assume that the datapath densely chooses port numbers, which can | |
483 | * therefore be used as an index into 'channels' and 'epoll_events' of | |
484 | * 'dpif'. */ | |
485 | if (port_idx >= dpif->uc_array_size) { | |
486 | uint32_t new_size = port_idx + 1; | |
487 | ||
488 | if (new_size > MAX_PORTS) { | |
489 | VLOG_WARN_RL(&error_rl, "%s: datapath port %"PRIu32" too big", | |
490 | dpif_name(&dpif->dpif), port_no); | |
491 | return EFBIG; | |
492 | } | |
493 | ||
494 | dpif->channels = xrealloc(dpif->channels, | |
495 | new_size * sizeof *dpif->channels); | |
496 | ||
497 | for (i = dpif->uc_array_size; i < new_size; i++) { | |
498 | dpif->channels[i].sock = NULL; | |
499 | } | |
500 | ||
501 | for (i = 0; i < dpif->n_handlers; i++) { | |
502 | struct dpif_handler *handler = &dpif->handlers[i]; | |
503 | ||
504 | handler->epoll_events = xrealloc(handler->epoll_events, | |
505 | new_size * sizeof *handler->epoll_events); | |
506 | ||
507 | } | |
508 | dpif->uc_array_size = new_size; | |
509 | } | |
510 | ||
511 | memset(&event, 0, sizeof event); | |
512 | event.events = EPOLLIN | EPOLLEXCLUSIVE; | |
513 | event.data.u32 = port_idx; | |
514 | ||
515 | for (i = 0; i < dpif->n_handlers; i++) { | |
516 | struct dpif_handler *handler = &dpif->handlers[i]; | |
517 | ||
518 | #ifndef _WIN32 | |
519 | if (epoll_ctl(handler->epoll_fd, EPOLL_CTL_ADD, nl_sock_fd(sock), | |
520 | &event) < 0) { | |
521 | error = errno; | |
522 | goto error; | |
523 | } | |
524 | #endif | |
525 | } | |
526 | dpif->channels[port_idx].sock = sock; | |
527 | dpif->channels[port_idx].last_poll = LLONG_MIN; | |
528 | ||
529 | return 0; | |
530 | ||
531 | error: | |
532 | #ifndef _WIN32 | |
533 | while (i--) { | |
534 | epoll_ctl(dpif->handlers[i].epoll_fd, EPOLL_CTL_DEL, | |
535 | nl_sock_fd(sock), NULL); | |
536 | } | |
537 | #endif | |
538 | dpif->channels[port_idx].sock = NULL; | |
539 | ||
540 | return error; | |
541 | } | |
542 | ||
543 | static void | |
544 | vport_del_channels(struct dpif_netlink *dpif, odp_port_t port_no) | |
545 | { | |
546 | uint32_t port_idx = odp_to_u32(port_no); | |
547 | size_t i; | |
548 | ||
549 | if (!dpif->handlers || port_idx >= dpif->uc_array_size | |
550 | || !dpif->channels[port_idx].sock) { | |
551 | return; | |
552 | } | |
553 | ||
554 | for (i = 0; i < dpif->n_handlers; i++) { | |
555 | struct dpif_handler *handler = &dpif->handlers[i]; | |
556 | #ifndef _WIN32 | |
557 | epoll_ctl(handler->epoll_fd, EPOLL_CTL_DEL, | |
558 | nl_sock_fd(dpif->channels[port_idx].sock), NULL); | |
559 | #endif | |
560 | handler->event_offset = handler->n_events = 0; | |
561 | } | |
562 | #ifndef _WIN32 | |
563 | nl_sock_destroy(dpif->channels[port_idx].sock); | |
564 | #endif | |
565 | dpif->channels[port_idx].sock = NULL; | |
566 | } | |
567 | ||
568 | static void | |
569 | destroy_all_channels(struct dpif_netlink *dpif) | |
570 | OVS_REQ_WRLOCK(dpif->upcall_lock) | |
571 | { | |
572 | unsigned int i; | |
573 | ||
574 | if (!dpif->handlers) { | |
575 | return; | |
576 | } | |
577 | ||
578 | for (i = 0; i < dpif->uc_array_size; i++ ) { | |
579 | struct dpif_netlink_vport vport_request; | |
580 | uint32_t upcall_pids = 0; | |
581 | ||
582 | if (!dpif->channels[i].sock) { | |
583 | continue; | |
584 | } | |
585 | ||
586 | /* Turn off upcalls. */ | |
587 | dpif_netlink_vport_init(&vport_request); | |
588 | vport_request.cmd = OVS_VPORT_CMD_SET; | |
589 | vport_request.dp_ifindex = dpif->dp_ifindex; | |
590 | vport_request.port_no = u32_to_odp(i); | |
591 | vport_request.n_upcall_pids = 1; | |
592 | vport_request.upcall_pids = &upcall_pids; | |
593 | dpif_netlink_vport_transact(&vport_request, NULL, NULL); | |
594 | ||
595 | vport_del_channels(dpif, u32_to_odp(i)); | |
596 | } | |
597 | ||
598 | for (i = 0; i < dpif->n_handlers; i++) { | |
599 | struct dpif_handler *handler = &dpif->handlers[i]; | |
600 | ||
601 | dpif_netlink_handler_uninit(handler); | |
602 | free(handler->epoll_events); | |
603 | } | |
604 | free(dpif->channels); | |
605 | free(dpif->handlers); | |
606 | dpif->handlers = NULL; | |
607 | dpif->channels = NULL; | |
608 | dpif->n_handlers = 0; | |
609 | dpif->uc_array_size = 0; | |
610 | } | |
611 | ||
612 | static void | |
613 | dpif_netlink_close(struct dpif *dpif_) | |
614 | { | |
615 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
616 | ||
617 | nl_sock_destroy(dpif->port_notifier); | |
618 | ||
619 | fat_rwlock_wrlock(&dpif->upcall_lock); | |
620 | destroy_all_channels(dpif); | |
621 | fat_rwlock_unlock(&dpif->upcall_lock); | |
622 | ||
623 | fat_rwlock_destroy(&dpif->upcall_lock); | |
624 | free(dpif); | |
625 | } | |
626 | ||
627 | static int | |
628 | dpif_netlink_destroy(struct dpif *dpif_) | |
629 | { | |
630 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
631 | struct dpif_netlink_dp dp; | |
632 | ||
633 | dpif_netlink_dp_init(&dp); | |
634 | dp.cmd = OVS_DP_CMD_DEL; | |
635 | dp.dp_ifindex = dpif->dp_ifindex; | |
636 | return dpif_netlink_dp_transact(&dp, NULL, NULL); | |
637 | } | |
638 | ||
639 | static bool | |
640 | dpif_netlink_run(struct dpif *dpif_) | |
641 | { | |
642 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
643 | ||
644 | if (dpif->refresh_channels) { | |
645 | dpif->refresh_channels = false; | |
646 | fat_rwlock_wrlock(&dpif->upcall_lock); | |
647 | dpif_netlink_refresh_channels(dpif, dpif->n_handlers); | |
648 | fat_rwlock_unlock(&dpif->upcall_lock); | |
649 | } | |
650 | return false; | |
651 | } | |
652 | ||
653 | static int | |
654 | dpif_netlink_get_stats(const struct dpif *dpif_, struct dpif_dp_stats *stats) | |
655 | { | |
656 | struct dpif_netlink_dp dp; | |
657 | struct ofpbuf *buf; | |
658 | int error; | |
659 | ||
660 | error = dpif_netlink_dp_get(dpif_, &dp, &buf); | |
661 | if (!error) { | |
662 | memset(stats, 0, sizeof *stats); | |
663 | ||
664 | if (dp.stats) { | |
665 | stats->n_hit = get_32aligned_u64(&dp.stats->n_hit); | |
666 | stats->n_missed = get_32aligned_u64(&dp.stats->n_missed); | |
667 | stats->n_lost = get_32aligned_u64(&dp.stats->n_lost); | |
668 | stats->n_flows = get_32aligned_u64(&dp.stats->n_flows); | |
669 | } | |
670 | ||
671 | if (dp.megaflow_stats) { | |
672 | stats->n_masks = dp.megaflow_stats->n_masks; | |
673 | stats->n_mask_hit = get_32aligned_u64( | |
674 | &dp.megaflow_stats->n_mask_hit); | |
675 | } else { | |
676 | stats->n_masks = UINT32_MAX; | |
677 | stats->n_mask_hit = UINT64_MAX; | |
678 | } | |
679 | ofpbuf_delete(buf); | |
680 | } | |
681 | return error; | |
682 | } | |
683 | ||
684 | static int | |
685 | dpif_netlink_set_features(struct dpif *dpif_, uint32_t new_features) | |
686 | { | |
687 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
688 | struct dpif_netlink_dp request, reply; | |
689 | struct ofpbuf *bufp; | |
690 | int error; | |
691 | ||
692 | dpif_netlink_dp_init(&request); | |
693 | request.cmd = OVS_DP_CMD_SET; | |
694 | request.name = dpif_->base_name; | |
695 | request.dp_ifindex = dpif->dp_ifindex; | |
696 | request.user_features = dpif->user_features | new_features; | |
697 | ||
698 | error = dpif_netlink_dp_transact(&request, &reply, &bufp); | |
699 | if (!error) { | |
700 | dpif->user_features = reply.user_features; | |
701 | ofpbuf_delete(bufp); | |
702 | if (!(dpif->user_features & new_features)) { | |
703 | return -EOPNOTSUPP; | |
704 | } | |
705 | } | |
706 | ||
707 | return error; | |
708 | } | |
709 | ||
710 | static const char * | |
711 | get_vport_type(const struct dpif_netlink_vport *vport) | |
712 | { | |
713 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20); | |
714 | ||
715 | switch (vport->type) { | |
716 | case OVS_VPORT_TYPE_NETDEV: { | |
717 | const char *type = netdev_get_type_from_name(vport->name); | |
718 | ||
719 | return type ? type : "system"; | |
720 | } | |
721 | ||
722 | case OVS_VPORT_TYPE_INTERNAL: | |
723 | return "internal"; | |
724 | ||
725 | case OVS_VPORT_TYPE_GENEVE: | |
726 | return "geneve"; | |
727 | ||
728 | case OVS_VPORT_TYPE_GRE: | |
729 | return "gre"; | |
730 | ||
731 | case OVS_VPORT_TYPE_VXLAN: | |
732 | return "vxlan"; | |
733 | ||
734 | case OVS_VPORT_TYPE_LISP: | |
735 | return "lisp"; | |
736 | ||
737 | case OVS_VPORT_TYPE_STT: | |
738 | return "stt"; | |
739 | ||
740 | case OVS_VPORT_TYPE_ERSPAN: | |
741 | return "erspan"; | |
742 | ||
743 | case OVS_VPORT_TYPE_IP6ERSPAN: | |
744 | return "ip6erspan"; | |
745 | ||
746 | case OVS_VPORT_TYPE_IP6GRE: | |
747 | return "ip6gre"; | |
748 | ||
749 | case OVS_VPORT_TYPE_GTPU: | |
750 | return "gtpu"; | |
751 | ||
752 | case OVS_VPORT_TYPE_UNSPEC: | |
753 | case __OVS_VPORT_TYPE_MAX: | |
754 | break; | |
755 | } | |
756 | ||
757 | VLOG_WARN_RL(&rl, "dp%d: port `%s' has unsupported type %u", | |
758 | vport->dp_ifindex, vport->name, (unsigned int) vport->type); | |
759 | return "unknown"; | |
760 | } | |
761 | ||
762 | enum ovs_vport_type | |
763 | netdev_to_ovs_vport_type(const char *type) | |
764 | { | |
765 | if (!strcmp(type, "tap") || !strcmp(type, "system")) { | |
766 | return OVS_VPORT_TYPE_NETDEV; | |
767 | } else if (!strcmp(type, "internal")) { | |
768 | return OVS_VPORT_TYPE_INTERNAL; | |
769 | } else if (strstr(type, "stt")) { | |
770 | return OVS_VPORT_TYPE_STT; | |
771 | } else if (!strcmp(type, "geneve")) { | |
772 | return OVS_VPORT_TYPE_GENEVE; | |
773 | } else if (!strcmp(type, "vxlan")) { | |
774 | return OVS_VPORT_TYPE_VXLAN; | |
775 | } else if (!strcmp(type, "lisp")) { | |
776 | return OVS_VPORT_TYPE_LISP; | |
777 | } else if (!strcmp(type, "erspan")) { | |
778 | return OVS_VPORT_TYPE_ERSPAN; | |
779 | } else if (!strcmp(type, "ip6erspan")) { | |
780 | return OVS_VPORT_TYPE_IP6ERSPAN; | |
781 | } else if (!strcmp(type, "ip6gre")) { | |
782 | return OVS_VPORT_TYPE_IP6GRE; | |
783 | } else if (!strcmp(type, "gre")) { | |
784 | return OVS_VPORT_TYPE_GRE; | |
785 | } else if (!strcmp(type, "gtpu")) { | |
786 | return OVS_VPORT_TYPE_GTPU; | |
787 | } else { | |
788 | return OVS_VPORT_TYPE_UNSPEC; | |
789 | } | |
790 | } | |
791 | ||
792 | static int | |
793 | dpif_netlink_port_add__(struct dpif_netlink *dpif, const char *name, | |
794 | enum ovs_vport_type type, | |
795 | struct ofpbuf *options, | |
796 | odp_port_t *port_nop) | |
797 | OVS_REQ_WRLOCK(dpif->upcall_lock) | |
798 | { | |
799 | struct dpif_netlink_vport request, reply; | |
800 | struct ofpbuf *buf; | |
801 | struct nl_sock *sock = NULL; | |
802 | uint32_t upcall_pids = 0; | |
803 | int error = 0; | |
804 | ||
805 | if (dpif->handlers) { | |
806 | error = create_nl_sock(dpif, &sock); | |
807 | if (error) { | |
808 | return error; | |
809 | } | |
810 | } | |
811 | ||
812 | dpif_netlink_vport_init(&request); | |
813 | request.cmd = OVS_VPORT_CMD_NEW; | |
814 | request.dp_ifindex = dpif->dp_ifindex; | |
815 | request.type = type; | |
816 | request.name = name; | |
817 | ||
818 | request.port_no = *port_nop; | |
819 | if (sock) { | |
820 | upcall_pids = nl_sock_pid(sock); | |
821 | } | |
822 | request.n_upcall_pids = 1; | |
823 | request.upcall_pids = &upcall_pids; | |
824 | ||
825 | if (options) { | |
826 | request.options = options->data; | |
827 | request.options_len = options->size; | |
828 | } | |
829 | ||
830 | error = dpif_netlink_vport_transact(&request, &reply, &buf); | |
831 | if (!error) { | |
832 | *port_nop = reply.port_no; | |
833 | } else { | |
834 | if (error == EBUSY && *port_nop != ODPP_NONE) { | |
835 | VLOG_INFO("%s: requested port %"PRIu32" is in use", | |
836 | dpif_name(&dpif->dpif), *port_nop); | |
837 | } | |
838 | ||
839 | close_nl_sock(sock); | |
840 | goto exit; | |
841 | } | |
842 | ||
843 | error = vport_add_channel(dpif, *port_nop, sock); | |
844 | if (error) { | |
845 | VLOG_INFO("%s: could not add channel for port %s", | |
846 | dpif_name(&dpif->dpif), name); | |
847 | ||
848 | /* Delete the port. */ | |
849 | dpif_netlink_vport_init(&request); | |
850 | request.cmd = OVS_VPORT_CMD_DEL; | |
851 | request.dp_ifindex = dpif->dp_ifindex; | |
852 | request.port_no = *port_nop; | |
853 | dpif_netlink_vport_transact(&request, NULL, NULL); | |
854 | close_nl_sock(sock); | |
855 | goto exit; | |
856 | } | |
857 | ||
858 | exit: | |
859 | ofpbuf_delete(buf); | |
860 | ||
861 | return error; | |
862 | } | |
863 | ||
864 | static int | |
865 | dpif_netlink_port_add_compat(struct dpif_netlink *dpif, struct netdev *netdev, | |
866 | odp_port_t *port_nop) | |
867 | OVS_REQ_WRLOCK(dpif->upcall_lock) | |
868 | { | |
869 | const struct netdev_tunnel_config *tnl_cfg; | |
870 | char namebuf[NETDEV_VPORT_NAME_BUFSIZE]; | |
871 | const char *type = netdev_get_type(netdev); | |
872 | uint64_t options_stub[64 / 8]; | |
873 | enum ovs_vport_type ovs_type; | |
874 | struct ofpbuf options; | |
875 | const char *name; | |
876 | ||
877 | name = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf); | |
878 | ||
879 | ovs_type = netdev_to_ovs_vport_type(netdev_get_type(netdev)); | |
880 | if (ovs_type == OVS_VPORT_TYPE_UNSPEC) { | |
881 | VLOG_WARN_RL(&error_rl, "%s: cannot create port `%s' because it has " | |
882 | "unsupported type `%s'", | |
883 | dpif_name(&dpif->dpif), name, type); | |
884 | return EINVAL; | |
885 | } | |
886 | ||
887 | if (ovs_type == OVS_VPORT_TYPE_NETDEV) { | |
888 | #ifdef _WIN32 | |
889 | /* XXX : Map appropiate Windows handle */ | |
890 | #else | |
891 | netdev_linux_ethtool_set_flag(netdev, ETH_FLAG_LRO, "LRO", false); | |
892 | #endif | |
893 | } | |
894 | ||
895 | #ifdef _WIN32 | |
896 | if (ovs_type == OVS_VPORT_TYPE_INTERNAL) { | |
897 | if (!create_wmi_port(name)){ | |
898 | VLOG_ERR("Could not create wmi internal port with name:%s", name); | |
899 | return EINVAL; | |
900 | }; | |
901 | } | |
902 | #endif | |
903 | ||
904 | tnl_cfg = netdev_get_tunnel_config(netdev); | |
905 | if (tnl_cfg && (tnl_cfg->dst_port != 0 || tnl_cfg->exts)) { | |
906 | ofpbuf_use_stack(&options, options_stub, sizeof options_stub); | |
907 | if (tnl_cfg->dst_port) { | |
908 | nl_msg_put_u16(&options, OVS_TUNNEL_ATTR_DST_PORT, | |
909 | ntohs(tnl_cfg->dst_port)); | |
910 | } | |
911 | if (tnl_cfg->exts) { | |
912 | size_t ext_ofs; | |
913 | int i; | |
914 | ||
915 | ext_ofs = nl_msg_start_nested(&options, OVS_TUNNEL_ATTR_EXTENSION); | |
916 | for (i = 0; i < 32; i++) { | |
917 | if (tnl_cfg->exts & (1 << i)) { | |
918 | nl_msg_put_flag(&options, i); | |
919 | } | |
920 | } | |
921 | nl_msg_end_nested(&options, ext_ofs); | |
922 | } | |
923 | return dpif_netlink_port_add__(dpif, name, ovs_type, &options, | |
924 | port_nop); | |
925 | } else { | |
926 | return dpif_netlink_port_add__(dpif, name, ovs_type, NULL, port_nop); | |
927 | } | |
928 | ||
929 | } | |
930 | ||
931 | static int | |
932 | dpif_netlink_rtnl_port_create_and_add(struct dpif_netlink *dpif, | |
933 | struct netdev *netdev, | |
934 | odp_port_t *port_nop) | |
935 | OVS_REQ_WRLOCK(dpif->upcall_lock) | |
936 | { | |
937 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20); | |
938 | char namebuf[NETDEV_VPORT_NAME_BUFSIZE]; | |
939 | const char *name; | |
940 | int error; | |
941 | ||
942 | error = dpif_netlink_rtnl_port_create(netdev); | |
943 | if (error) { | |
944 | if (error != EOPNOTSUPP) { | |
945 | VLOG_WARN_RL(&rl, "Failed to create %s with rtnetlink: %s", | |
946 | netdev_get_name(netdev), ovs_strerror(error)); | |
947 | } | |
948 | return error; | |
949 | } | |
950 | ||
951 | name = netdev_vport_get_dpif_port(netdev, namebuf, sizeof namebuf); | |
952 | error = dpif_netlink_port_add__(dpif, name, OVS_VPORT_TYPE_NETDEV, NULL, | |
953 | port_nop); | |
954 | if (error) { | |
955 | dpif_netlink_rtnl_port_destroy(name, netdev_get_type(netdev)); | |
956 | } | |
957 | return error; | |
958 | } | |
959 | ||
960 | static int | |
961 | dpif_netlink_port_add(struct dpif *dpif_, struct netdev *netdev, | |
962 | odp_port_t *port_nop) | |
963 | { | |
964 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
965 | int error = EOPNOTSUPP; | |
966 | ||
967 | fat_rwlock_wrlock(&dpif->upcall_lock); | |
968 | if (!ovs_tunnels_out_of_tree) { | |
969 | error = dpif_netlink_rtnl_port_create_and_add(dpif, netdev, port_nop); | |
970 | } | |
971 | if (error) { | |
972 | error = dpif_netlink_port_add_compat(dpif, netdev, port_nop); | |
973 | } | |
974 | fat_rwlock_unlock(&dpif->upcall_lock); | |
975 | ||
976 | return error; | |
977 | } | |
978 | ||
979 | static int | |
980 | dpif_netlink_port_del__(struct dpif_netlink *dpif, odp_port_t port_no) | |
981 | OVS_REQ_WRLOCK(dpif->upcall_lock) | |
982 | { | |
983 | struct dpif_netlink_vport vport; | |
984 | struct dpif_port dpif_port; | |
985 | int error; | |
986 | ||
987 | error = dpif_netlink_port_query__(dpif, port_no, NULL, &dpif_port); | |
988 | if (error) { | |
989 | return error; | |
990 | } | |
991 | ||
992 | dpif_netlink_vport_init(&vport); | |
993 | vport.cmd = OVS_VPORT_CMD_DEL; | |
994 | vport.dp_ifindex = dpif->dp_ifindex; | |
995 | vport.port_no = port_no; | |
996 | #ifdef _WIN32 | |
997 | if (!strcmp(dpif_port.type, "internal")) { | |
998 | if (!delete_wmi_port(dpif_port.name)) { | |
999 | VLOG_ERR("Could not delete wmi port with name: %s", | |
1000 | dpif_port.name); | |
1001 | }; | |
1002 | } | |
1003 | #endif | |
1004 | error = dpif_netlink_vport_transact(&vport, NULL, NULL); | |
1005 | ||
1006 | vport_del_channels(dpif, port_no); | |
1007 | ||
1008 | if (!error && !ovs_tunnels_out_of_tree) { | |
1009 | error = dpif_netlink_rtnl_port_destroy(dpif_port.name, dpif_port.type); | |
1010 | if (error == EOPNOTSUPP) { | |
1011 | error = 0; | |
1012 | } | |
1013 | } | |
1014 | ||
1015 | dpif_port_destroy(&dpif_port); | |
1016 | ||
1017 | return error; | |
1018 | } | |
1019 | ||
1020 | static int | |
1021 | dpif_netlink_port_del(struct dpif *dpif_, odp_port_t port_no) | |
1022 | { | |
1023 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
1024 | int error; | |
1025 | ||
1026 | fat_rwlock_wrlock(&dpif->upcall_lock); | |
1027 | error = dpif_netlink_port_del__(dpif, port_no); | |
1028 | fat_rwlock_unlock(&dpif->upcall_lock); | |
1029 | ||
1030 | return error; | |
1031 | } | |
1032 | ||
1033 | static int | |
1034 | dpif_netlink_port_query__(const struct dpif_netlink *dpif, odp_port_t port_no, | |
1035 | const char *port_name, struct dpif_port *dpif_port) | |
1036 | { | |
1037 | struct dpif_netlink_vport request; | |
1038 | struct dpif_netlink_vport reply; | |
1039 | struct ofpbuf *buf; | |
1040 | int error; | |
1041 | ||
1042 | dpif_netlink_vport_init(&request); | |
1043 | request.cmd = OVS_VPORT_CMD_GET; | |
1044 | request.dp_ifindex = dpif->dp_ifindex; | |
1045 | request.port_no = port_no; | |
1046 | request.name = port_name; | |
1047 | ||
1048 | error = dpif_netlink_vport_transact(&request, &reply, &buf); | |
1049 | if (!error) { | |
1050 | if (reply.dp_ifindex != request.dp_ifindex) { | |
1051 | /* A query by name reported that 'port_name' is in some datapath | |
1052 | * other than 'dpif', but the caller wants to know about 'dpif'. */ | |
1053 | error = ENODEV; | |
1054 | } else if (dpif_port) { | |
1055 | dpif_port->name = xstrdup(reply.name); | |
1056 | dpif_port->type = xstrdup(get_vport_type(&reply)); | |
1057 | dpif_port->port_no = reply.port_no; | |
1058 | } | |
1059 | ofpbuf_delete(buf); | |
1060 | } | |
1061 | return error; | |
1062 | } | |
1063 | ||
1064 | static int | |
1065 | dpif_netlink_port_query_by_number(const struct dpif *dpif_, odp_port_t port_no, | |
1066 | struct dpif_port *dpif_port) | |
1067 | { | |
1068 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
1069 | ||
1070 | return dpif_netlink_port_query__(dpif, port_no, NULL, dpif_port); | |
1071 | } | |
1072 | ||
1073 | static int | |
1074 | dpif_netlink_port_query_by_name(const struct dpif *dpif_, const char *devname, | |
1075 | struct dpif_port *dpif_port) | |
1076 | { | |
1077 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
1078 | ||
1079 | return dpif_netlink_port_query__(dpif, 0, devname, dpif_port); | |
1080 | } | |
1081 | ||
1082 | static uint32_t | |
1083 | dpif_netlink_port_get_pid__(const struct dpif_netlink *dpif, | |
1084 | odp_port_t port_no) | |
1085 | OVS_REQ_RDLOCK(dpif->upcall_lock) | |
1086 | { | |
1087 | uint32_t port_idx = odp_to_u32(port_no); | |
1088 | uint32_t pid = 0; | |
1089 | ||
1090 | if (dpif->handlers && dpif->uc_array_size > 0) { | |
1091 | /* The ODPP_NONE "reserved" port number uses the "ovs-system"'s | |
1092 | * channel, since it is not heavily loaded. */ | |
1093 | uint32_t idx = port_idx >= dpif->uc_array_size ? 0 : port_idx; | |
1094 | ||
1095 | /* Needs to check in case the socket pointer is changed in between | |
1096 | * the holding of upcall_lock. A known case happens when the main | |
1097 | * thread deletes the vport while the handler thread is handling | |
1098 | * the upcall from that port. */ | |
1099 | if (dpif->channels[idx].sock) { | |
1100 | pid = nl_sock_pid(dpif->channels[idx].sock); | |
1101 | } | |
1102 | } | |
1103 | ||
1104 | return pid; | |
1105 | } | |
1106 | ||
1107 | static uint32_t | |
1108 | dpif_netlink_port_get_pid(const struct dpif *dpif_, odp_port_t port_no) | |
1109 | { | |
1110 | const struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
1111 | uint32_t ret; | |
1112 | ||
1113 | fat_rwlock_rdlock(&dpif->upcall_lock); | |
1114 | ret = dpif_netlink_port_get_pid__(dpif, port_no); | |
1115 | fat_rwlock_unlock(&dpif->upcall_lock); | |
1116 | ||
1117 | return ret; | |
1118 | } | |
1119 | ||
1120 | static int | |
1121 | dpif_netlink_flow_flush(struct dpif *dpif_) | |
1122 | { | |
1123 | const char *dpif_type_str = dpif_normalize_type(dpif_type(dpif_)); | |
1124 | const struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
1125 | struct dpif_netlink_flow flow; | |
1126 | ||
1127 | dpif_netlink_flow_init(&flow); | |
1128 | flow.cmd = OVS_FLOW_CMD_DEL; | |
1129 | flow.dp_ifindex = dpif->dp_ifindex; | |
1130 | ||
1131 | if (netdev_is_flow_api_enabled()) { | |
1132 | netdev_ports_flow_flush(dpif_type_str); | |
1133 | } | |
1134 | ||
1135 | return dpif_netlink_flow_transact(&flow, NULL, NULL); | |
1136 | } | |
1137 | ||
1138 | struct dpif_netlink_port_state { | |
1139 | struct nl_dump dump; | |
1140 | struct ofpbuf buf; | |
1141 | }; | |
1142 | ||
1143 | static void | |
1144 | dpif_netlink_port_dump_start__(const struct dpif_netlink *dpif, | |
1145 | struct nl_dump *dump) | |
1146 | { | |
1147 | struct dpif_netlink_vport request; | |
1148 | struct ofpbuf *buf; | |
1149 | ||
1150 | dpif_netlink_vport_init(&request); | |
1151 | request.cmd = OVS_VPORT_CMD_GET; | |
1152 | request.dp_ifindex = dpif->dp_ifindex; | |
1153 | ||
1154 | buf = ofpbuf_new(1024); | |
1155 | dpif_netlink_vport_to_ofpbuf(&request, buf); | |
1156 | nl_dump_start(dump, NETLINK_GENERIC, buf); | |
1157 | ofpbuf_delete(buf); | |
1158 | } | |
1159 | ||
1160 | static int | |
1161 | dpif_netlink_port_dump_start(const struct dpif *dpif_, void **statep) | |
1162 | { | |
1163 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
1164 | struct dpif_netlink_port_state *state; | |
1165 | ||
1166 | *statep = state = xmalloc(sizeof *state); | |
1167 | dpif_netlink_port_dump_start__(dpif, &state->dump); | |
1168 | ||
1169 | ofpbuf_init(&state->buf, NL_DUMP_BUFSIZE); | |
1170 | return 0; | |
1171 | } | |
1172 | ||
1173 | static int | |
1174 | dpif_netlink_port_dump_next__(const struct dpif_netlink *dpif, | |
1175 | struct nl_dump *dump, | |
1176 | struct dpif_netlink_vport *vport, | |
1177 | struct ofpbuf *buffer) | |
1178 | { | |
1179 | struct ofpbuf buf; | |
1180 | int error; | |
1181 | ||
1182 | if (!nl_dump_next(dump, &buf, buffer)) { | |
1183 | return EOF; | |
1184 | } | |
1185 | ||
1186 | error = dpif_netlink_vport_from_ofpbuf(vport, &buf); | |
1187 | if (error) { | |
1188 | VLOG_WARN_RL(&error_rl, "%s: failed to parse vport record (%s)", | |
1189 | dpif_name(&dpif->dpif), ovs_strerror(error)); | |
1190 | } | |
1191 | return error; | |
1192 | } | |
1193 | ||
1194 | static int | |
1195 | dpif_netlink_port_dump_next(const struct dpif *dpif_, void *state_, | |
1196 | struct dpif_port *dpif_port) | |
1197 | { | |
1198 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
1199 | struct dpif_netlink_port_state *state = state_; | |
1200 | struct dpif_netlink_vport vport; | |
1201 | int error; | |
1202 | ||
1203 | error = dpif_netlink_port_dump_next__(dpif, &state->dump, &vport, | |
1204 | &state->buf); | |
1205 | if (error) { | |
1206 | return error; | |
1207 | } | |
1208 | dpif_port->name = CONST_CAST(char *, vport.name); | |
1209 | dpif_port->type = CONST_CAST(char *, get_vport_type(&vport)); | |
1210 | dpif_port->port_no = vport.port_no; | |
1211 | return 0; | |
1212 | } | |
1213 | ||
1214 | static int | |
1215 | dpif_netlink_port_dump_done(const struct dpif *dpif_ OVS_UNUSED, void *state_) | |
1216 | { | |
1217 | struct dpif_netlink_port_state *state = state_; | |
1218 | int error = nl_dump_done(&state->dump); | |
1219 | ||
1220 | ofpbuf_uninit(&state->buf); | |
1221 | free(state); | |
1222 | return error; | |
1223 | } | |
1224 | ||
1225 | static int | |
1226 | dpif_netlink_port_poll(const struct dpif *dpif_, char **devnamep) | |
1227 | { | |
1228 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
1229 | ||
1230 | /* Lazily create the Netlink socket to listen for notifications. */ | |
1231 | if (!dpif->port_notifier) { | |
1232 | struct nl_sock *sock; | |
1233 | int error; | |
1234 | ||
1235 | error = nl_sock_create(NETLINK_GENERIC, &sock); | |
1236 | if (error) { | |
1237 | return error; | |
1238 | } | |
1239 | ||
1240 | error = nl_sock_join_mcgroup(sock, ovs_vport_mcgroup); | |
1241 | if (error) { | |
1242 | nl_sock_destroy(sock); | |
1243 | return error; | |
1244 | } | |
1245 | dpif->port_notifier = sock; | |
1246 | ||
1247 | /* We have no idea of the current state so report that everything | |
1248 | * changed. */ | |
1249 | return ENOBUFS; | |
1250 | } | |
1251 | ||
1252 | for (;;) { | |
1253 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
1254 | uint64_t buf_stub[4096 / 8]; | |
1255 | struct ofpbuf buf; | |
1256 | int error; | |
1257 | ||
1258 | ofpbuf_use_stub(&buf, buf_stub, sizeof buf_stub); | |
1259 | error = nl_sock_recv(dpif->port_notifier, &buf, NULL, false); | |
1260 | if (!error) { | |
1261 | struct dpif_netlink_vport vport; | |
1262 | ||
1263 | error = dpif_netlink_vport_from_ofpbuf(&vport, &buf); | |
1264 | if (!error) { | |
1265 | if (vport.dp_ifindex == dpif->dp_ifindex | |
1266 | && (vport.cmd == OVS_VPORT_CMD_NEW | |
1267 | || vport.cmd == OVS_VPORT_CMD_DEL | |
1268 | || vport.cmd == OVS_VPORT_CMD_SET)) { | |
1269 | VLOG_DBG("port_changed: dpif:%s vport:%s cmd:%"PRIu8, | |
1270 | dpif->dpif.full_name, vport.name, vport.cmd); | |
1271 | if (vport.cmd == OVS_VPORT_CMD_DEL && dpif->handlers) { | |
1272 | dpif->refresh_channels = true; | |
1273 | } | |
1274 | *devnamep = xstrdup(vport.name); | |
1275 | ofpbuf_uninit(&buf); | |
1276 | return 0; | |
1277 | } | |
1278 | } | |
1279 | } else if (error != EAGAIN) { | |
1280 | VLOG_WARN_RL(&rl, "error reading or parsing netlink (%s)", | |
1281 | ovs_strerror(error)); | |
1282 | nl_sock_drain(dpif->port_notifier); | |
1283 | error = ENOBUFS; | |
1284 | } | |
1285 | ||
1286 | ofpbuf_uninit(&buf); | |
1287 | if (error) { | |
1288 | return error; | |
1289 | } | |
1290 | } | |
1291 | } | |
1292 | ||
1293 | static void | |
1294 | dpif_netlink_port_poll_wait(const struct dpif *dpif_) | |
1295 | { | |
1296 | const struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
1297 | ||
1298 | if (dpif->port_notifier) { | |
1299 | nl_sock_wait(dpif->port_notifier, POLLIN); | |
1300 | } else { | |
1301 | poll_immediate_wake(); | |
1302 | } | |
1303 | } | |
1304 | ||
1305 | static void | |
1306 | dpif_netlink_flow_init_ufid(struct dpif_netlink_flow *request, | |
1307 | const ovs_u128 *ufid, bool terse) | |
1308 | { | |
1309 | if (ufid) { | |
1310 | request->ufid = *ufid; | |
1311 | request->ufid_present = true; | |
1312 | } else { | |
1313 | request->ufid_present = false; | |
1314 | } | |
1315 | request->ufid_terse = terse; | |
1316 | } | |
1317 | ||
1318 | static void | |
1319 | dpif_netlink_init_flow_get__(const struct dpif_netlink *dpif, | |
1320 | const struct nlattr *key, size_t key_len, | |
1321 | const ovs_u128 *ufid, bool terse, | |
1322 | struct dpif_netlink_flow *request) | |
1323 | { | |
1324 | dpif_netlink_flow_init(request); | |
1325 | request->cmd = OVS_FLOW_CMD_GET; | |
1326 | request->dp_ifindex = dpif->dp_ifindex; | |
1327 | request->key = key; | |
1328 | request->key_len = key_len; | |
1329 | dpif_netlink_flow_init_ufid(request, ufid, terse); | |
1330 | } | |
1331 | ||
1332 | static void | |
1333 | dpif_netlink_init_flow_get(const struct dpif_netlink *dpif, | |
1334 | const struct dpif_flow_get *get, | |
1335 | struct dpif_netlink_flow *request) | |
1336 | { | |
1337 | dpif_netlink_init_flow_get__(dpif, get->key, get->key_len, get->ufid, | |
1338 | false, request); | |
1339 | } | |
1340 | ||
1341 | static int | |
1342 | dpif_netlink_flow_get__(const struct dpif_netlink *dpif, | |
1343 | const struct nlattr *key, size_t key_len, | |
1344 | const ovs_u128 *ufid, bool terse, | |
1345 | struct dpif_netlink_flow *reply, struct ofpbuf **bufp) | |
1346 | { | |
1347 | struct dpif_netlink_flow request; | |
1348 | ||
1349 | dpif_netlink_init_flow_get__(dpif, key, key_len, ufid, terse, &request); | |
1350 | return dpif_netlink_flow_transact(&request, reply, bufp); | |
1351 | } | |
1352 | ||
1353 | static int | |
1354 | dpif_netlink_flow_get(const struct dpif_netlink *dpif, | |
1355 | const struct dpif_netlink_flow *flow, | |
1356 | struct dpif_netlink_flow *reply, struct ofpbuf **bufp) | |
1357 | { | |
1358 | return dpif_netlink_flow_get__(dpif, flow->key, flow->key_len, | |
1359 | flow->ufid_present ? &flow->ufid : NULL, | |
1360 | false, reply, bufp); | |
1361 | } | |
1362 | ||
1363 | static void | |
1364 | dpif_netlink_init_flow_put(struct dpif_netlink *dpif, | |
1365 | const struct dpif_flow_put *put, | |
1366 | struct dpif_netlink_flow *request) | |
1367 | { | |
1368 | static const struct nlattr dummy_action; | |
1369 | ||
1370 | dpif_netlink_flow_init(request); | |
1371 | request->cmd = (put->flags & DPIF_FP_CREATE | |
1372 | ? OVS_FLOW_CMD_NEW : OVS_FLOW_CMD_SET); | |
1373 | request->dp_ifindex = dpif->dp_ifindex; | |
1374 | request->key = put->key; | |
1375 | request->key_len = put->key_len; | |
1376 | request->mask = put->mask; | |
1377 | request->mask_len = put->mask_len; | |
1378 | dpif_netlink_flow_init_ufid(request, put->ufid, false); | |
1379 | ||
1380 | /* Ensure that OVS_FLOW_ATTR_ACTIONS will always be included. */ | |
1381 | request->actions = (put->actions | |
1382 | ? put->actions | |
1383 | : CONST_CAST(struct nlattr *, &dummy_action)); | |
1384 | request->actions_len = put->actions_len; | |
1385 | if (put->flags & DPIF_FP_ZERO_STATS) { | |
1386 | request->clear = true; | |
1387 | } | |
1388 | if (put->flags & DPIF_FP_PROBE) { | |
1389 | request->probe = true; | |
1390 | } | |
1391 | request->nlmsg_flags = put->flags & DPIF_FP_MODIFY ? 0 : NLM_F_CREATE; | |
1392 | } | |
1393 | ||
1394 | static void | |
1395 | dpif_netlink_init_flow_del__(struct dpif_netlink *dpif, | |
1396 | const struct nlattr *key, size_t key_len, | |
1397 | const ovs_u128 *ufid, bool terse, | |
1398 | struct dpif_netlink_flow *request) | |
1399 | { | |
1400 | dpif_netlink_flow_init(request); | |
1401 | request->cmd = OVS_FLOW_CMD_DEL; | |
1402 | request->dp_ifindex = dpif->dp_ifindex; | |
1403 | request->key = key; | |
1404 | request->key_len = key_len; | |
1405 | dpif_netlink_flow_init_ufid(request, ufid, terse); | |
1406 | } | |
1407 | ||
1408 | static void | |
1409 | dpif_netlink_init_flow_del(struct dpif_netlink *dpif, | |
1410 | const struct dpif_flow_del *del, | |
1411 | struct dpif_netlink_flow *request) | |
1412 | { | |
1413 | dpif_netlink_init_flow_del__(dpif, del->key, del->key_len, | |
1414 | del->ufid, del->terse, request); | |
1415 | } | |
1416 | ||
1417 | struct dpif_netlink_flow_dump { | |
1418 | struct dpif_flow_dump up; | |
1419 | struct nl_dump nl_dump; | |
1420 | atomic_int status; | |
1421 | struct netdev_flow_dump **netdev_dumps; | |
1422 | int netdev_dumps_num; /* Number of netdev_flow_dumps */ | |
1423 | struct ovs_mutex netdev_lock; /* Guards the following. */ | |
1424 | int netdev_current_dump OVS_GUARDED; /* Shared current dump */ | |
1425 | struct dpif_flow_dump_types types; /* Type of dump */ | |
1426 | }; | |
1427 | ||
1428 | static struct dpif_netlink_flow_dump * | |
1429 | dpif_netlink_flow_dump_cast(struct dpif_flow_dump *dump) | |
1430 | { | |
1431 | return CONTAINER_OF(dump, struct dpif_netlink_flow_dump, up); | |
1432 | } | |
1433 | ||
1434 | static void | |
1435 | start_netdev_dump(const struct dpif *dpif_, | |
1436 | struct dpif_netlink_flow_dump *dump) | |
1437 | { | |
1438 | ovs_mutex_init(&dump->netdev_lock); | |
1439 | ||
1440 | if (!(dump->types.netdev_flows)) { | |
1441 | dump->netdev_dumps_num = 0; | |
1442 | dump->netdev_dumps = NULL; | |
1443 | return; | |
1444 | } | |
1445 | ||
1446 | ovs_mutex_lock(&dump->netdev_lock); | |
1447 | dump->netdev_current_dump = 0; | |
1448 | dump->netdev_dumps | |
1449 | = netdev_ports_flow_dump_create(dpif_normalize_type(dpif_type(dpif_)), | |
1450 | &dump->netdev_dumps_num, | |
1451 | dump->up.terse); | |
1452 | ovs_mutex_unlock(&dump->netdev_lock); | |
1453 | } | |
1454 | ||
1455 | static void | |
1456 | dpif_netlink_populate_flow_dump_types(struct dpif_netlink_flow_dump *dump, | |
1457 | struct dpif_flow_dump_types *types) | |
1458 | { | |
1459 | if (!types) { | |
1460 | dump->types.ovs_flows = true; | |
1461 | dump->types.netdev_flows = true; | |
1462 | } else { | |
1463 | memcpy(&dump->types, types, sizeof *types); | |
1464 | } | |
1465 | } | |
1466 | ||
1467 | static struct dpif_flow_dump * | |
1468 | dpif_netlink_flow_dump_create(const struct dpif *dpif_, bool terse, | |
1469 | struct dpif_flow_dump_types *types) | |
1470 | { | |
1471 | const struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
1472 | struct dpif_netlink_flow_dump *dump; | |
1473 | struct dpif_netlink_flow request; | |
1474 | struct ofpbuf *buf; | |
1475 | ||
1476 | dump = xmalloc(sizeof *dump); | |
1477 | dpif_flow_dump_init(&dump->up, dpif_); | |
1478 | ||
1479 | dpif_netlink_populate_flow_dump_types(dump, types); | |
1480 | ||
1481 | if (dump->types.ovs_flows) { | |
1482 | dpif_netlink_flow_init(&request); | |
1483 | request.cmd = OVS_FLOW_CMD_GET; | |
1484 | request.dp_ifindex = dpif->dp_ifindex; | |
1485 | request.ufid_present = false; | |
1486 | request.ufid_terse = terse; | |
1487 | ||
1488 | buf = ofpbuf_new(1024); | |
1489 | dpif_netlink_flow_to_ofpbuf(&request, buf); | |
1490 | nl_dump_start(&dump->nl_dump, NETLINK_GENERIC, buf); | |
1491 | ofpbuf_delete(buf); | |
1492 | } | |
1493 | atomic_init(&dump->status, 0); | |
1494 | dump->up.terse = terse; | |
1495 | ||
1496 | start_netdev_dump(dpif_, dump); | |
1497 | ||
1498 | return &dump->up; | |
1499 | } | |
1500 | ||
1501 | static int | |
1502 | dpif_netlink_flow_dump_destroy(struct dpif_flow_dump *dump_) | |
1503 | { | |
1504 | struct dpif_netlink_flow_dump *dump = dpif_netlink_flow_dump_cast(dump_); | |
1505 | unsigned int nl_status = 0; | |
1506 | int dump_status; | |
1507 | ||
1508 | if (dump->types.ovs_flows) { | |
1509 | nl_status = nl_dump_done(&dump->nl_dump); | |
1510 | } | |
1511 | ||
1512 | for (int i = 0; i < dump->netdev_dumps_num; i++) { | |
1513 | int err = netdev_flow_dump_destroy(dump->netdev_dumps[i]); | |
1514 | ||
1515 | if (err != 0 && err != EOPNOTSUPP) { | |
1516 | VLOG_ERR("failed dumping netdev: %s", ovs_strerror(err)); | |
1517 | } | |
1518 | } | |
1519 | ||
1520 | free(dump->netdev_dumps); | |
1521 | ovs_mutex_destroy(&dump->netdev_lock); | |
1522 | ||
1523 | /* No other thread has access to 'dump' at this point. */ | |
1524 | atomic_read_relaxed(&dump->status, &dump_status); | |
1525 | free(dump); | |
1526 | return dump_status ? dump_status : nl_status; | |
1527 | } | |
1528 | ||
1529 | struct dpif_netlink_flow_dump_thread { | |
1530 | struct dpif_flow_dump_thread up; | |
1531 | struct dpif_netlink_flow_dump *dump; | |
1532 | struct dpif_netlink_flow flow; | |
1533 | struct dpif_flow_stats stats; | |
1534 | struct ofpbuf nl_flows; /* Always used to store flows. */ | |
1535 | struct ofpbuf *nl_actions; /* Used if kernel does not supply actions. */ | |
1536 | int netdev_dump_idx; /* This thread current netdev dump index */ | |
1537 | bool netdev_done; /* If we are finished dumping netdevs */ | |
1538 | ||
1539 | /* (Key/Mask/Actions) Buffers for netdev dumping */ | |
1540 | struct odputil_keybuf keybuf[FLOW_DUMP_MAX_BATCH]; | |
1541 | struct odputil_keybuf maskbuf[FLOW_DUMP_MAX_BATCH]; | |
1542 | struct odputil_keybuf actbuf[FLOW_DUMP_MAX_BATCH]; | |
1543 | }; | |
1544 | ||
1545 | static struct dpif_netlink_flow_dump_thread * | |
1546 | dpif_netlink_flow_dump_thread_cast(struct dpif_flow_dump_thread *thread) | |
1547 | { | |
1548 | return CONTAINER_OF(thread, struct dpif_netlink_flow_dump_thread, up); | |
1549 | } | |
1550 | ||
1551 | static struct dpif_flow_dump_thread * | |
1552 | dpif_netlink_flow_dump_thread_create(struct dpif_flow_dump *dump_) | |
1553 | { | |
1554 | struct dpif_netlink_flow_dump *dump = dpif_netlink_flow_dump_cast(dump_); | |
1555 | struct dpif_netlink_flow_dump_thread *thread; | |
1556 | ||
1557 | thread = xmalloc(sizeof *thread); | |
1558 | dpif_flow_dump_thread_init(&thread->up, &dump->up); | |
1559 | thread->dump = dump; | |
1560 | ofpbuf_init(&thread->nl_flows, NL_DUMP_BUFSIZE); | |
1561 | thread->nl_actions = NULL; | |
1562 | thread->netdev_dump_idx = 0; | |
1563 | thread->netdev_done = !(thread->netdev_dump_idx < dump->netdev_dumps_num); | |
1564 | ||
1565 | return &thread->up; | |
1566 | } | |
1567 | ||
1568 | static void | |
1569 | dpif_netlink_flow_dump_thread_destroy(struct dpif_flow_dump_thread *thread_) | |
1570 | { | |
1571 | struct dpif_netlink_flow_dump_thread *thread | |
1572 | = dpif_netlink_flow_dump_thread_cast(thread_); | |
1573 | ||
1574 | ofpbuf_uninit(&thread->nl_flows); | |
1575 | ofpbuf_delete(thread->nl_actions); | |
1576 | free(thread); | |
1577 | } | |
1578 | ||
1579 | static void | |
1580 | dpif_netlink_flow_to_dpif_flow(struct dpif_flow *dpif_flow, | |
1581 | const struct dpif_netlink_flow *datapath_flow) | |
1582 | { | |
1583 | dpif_flow->key = datapath_flow->key; | |
1584 | dpif_flow->key_len = datapath_flow->key_len; | |
1585 | dpif_flow->mask = datapath_flow->mask; | |
1586 | dpif_flow->mask_len = datapath_flow->mask_len; | |
1587 | dpif_flow->actions = datapath_flow->actions; | |
1588 | dpif_flow->actions_len = datapath_flow->actions_len; | |
1589 | dpif_flow->ufid_present = datapath_flow->ufid_present; | |
1590 | dpif_flow->pmd_id = PMD_ID_NULL; | |
1591 | if (datapath_flow->ufid_present) { | |
1592 | dpif_flow->ufid = datapath_flow->ufid; | |
1593 | } else { | |
1594 | ovs_assert(datapath_flow->key && datapath_flow->key_len); | |
1595 | odp_flow_key_hash(datapath_flow->key, datapath_flow->key_len, | |
1596 | &dpif_flow->ufid); | |
1597 | } | |
1598 | dpif_netlink_flow_get_stats(datapath_flow, &dpif_flow->stats); | |
1599 | dpif_flow->attrs.offloaded = false; | |
1600 | dpif_flow->attrs.dp_layer = "ovs"; | |
1601 | dpif_flow->attrs.dp_extra_info = NULL; | |
1602 | } | |
1603 | ||
1604 | /* The design is such that all threads are working together on the first dump | |
1605 | * to the last, in order (at first they all on dump 0). | |
1606 | * When the first thread finds that the given dump is finished, | |
1607 | * they all move to the next. If two or more threads find the same dump | |
1608 | * is finished at the same time, the first one will advance the shared | |
1609 | * netdev_current_dump and the others will catch up. */ | |
1610 | static void | |
1611 | dpif_netlink_advance_netdev_dump(struct dpif_netlink_flow_dump_thread *thread) | |
1612 | { | |
1613 | struct dpif_netlink_flow_dump *dump = thread->dump; | |
1614 | ||
1615 | ovs_mutex_lock(&dump->netdev_lock); | |
1616 | /* if we haven't finished (dumped everything) */ | |
1617 | if (dump->netdev_current_dump < dump->netdev_dumps_num) { | |
1618 | /* if we are the first to find that current dump is finished | |
1619 | * advance it. */ | |
1620 | if (thread->netdev_dump_idx == dump->netdev_current_dump) { | |
1621 | thread->netdev_dump_idx = ++dump->netdev_current_dump; | |
1622 | /* did we just finish the last dump? done. */ | |
1623 | if (dump->netdev_current_dump == dump->netdev_dumps_num) { | |
1624 | thread->netdev_done = true; | |
1625 | } | |
1626 | } else { | |
1627 | /* otherwise, we are behind, catch up */ | |
1628 | thread->netdev_dump_idx = dump->netdev_current_dump; | |
1629 | } | |
1630 | } else { | |
1631 | /* some other thread finished */ | |
1632 | thread->netdev_done = true; | |
1633 | } | |
1634 | ovs_mutex_unlock(&dump->netdev_lock); | |
1635 | } | |
1636 | ||
1637 | static int | |
1638 | dpif_netlink_netdev_match_to_dpif_flow(struct match *match, | |
1639 | struct ofpbuf *key_buf, | |
1640 | struct ofpbuf *mask_buf, | |
1641 | struct nlattr *actions, | |
1642 | struct dpif_flow_stats *stats, | |
1643 | struct dpif_flow_attrs *attrs, | |
1644 | ovs_u128 *ufid, | |
1645 | struct dpif_flow *flow, | |
1646 | bool terse) | |
1647 | { | |
1648 | memset(flow, 0, sizeof *flow); | |
1649 | ||
1650 | if (!terse) { | |
1651 | struct odp_flow_key_parms odp_parms = { | |
1652 | .flow = &match->flow, | |
1653 | .mask = &match->wc.masks, | |
1654 | .support = { | |
1655 | .max_vlan_headers = 2, | |
1656 | .recirc = true, | |
1657 | .ct_state = true, | |
1658 | .ct_zone = true, | |
1659 | .ct_mark = true, | |
1660 | .ct_label = true, | |
1661 | }, | |
1662 | }; | |
1663 | size_t offset; | |
1664 | ||
1665 | /* Key */ | |
1666 | offset = key_buf->size; | |
1667 | flow->key = ofpbuf_tail(key_buf); | |
1668 | odp_flow_key_from_flow(&odp_parms, key_buf); | |
1669 | flow->key_len = key_buf->size - offset; | |
1670 | ||
1671 | /* Mask */ | |
1672 | offset = mask_buf->size; | |
1673 | flow->mask = ofpbuf_tail(mask_buf); | |
1674 | odp_parms.key_buf = key_buf; | |
1675 | odp_flow_key_from_mask(&odp_parms, mask_buf); | |
1676 | flow->mask_len = mask_buf->size - offset; | |
1677 | ||
1678 | /* Actions */ | |
1679 | flow->actions = nl_attr_get(actions); | |
1680 | flow->actions_len = nl_attr_get_size(actions); | |
1681 | } | |
1682 | ||
1683 | /* Stats */ | |
1684 | memcpy(&flow->stats, stats, sizeof *stats); | |
1685 | ||
1686 | /* UFID */ | |
1687 | flow->ufid_present = true; | |
1688 | flow->ufid = *ufid; | |
1689 | ||
1690 | flow->pmd_id = PMD_ID_NULL; | |
1691 | ||
1692 | memcpy(&flow->attrs, attrs, sizeof *attrs); | |
1693 | ||
1694 | return 0; | |
1695 | } | |
1696 | ||
1697 | static int | |
1698 | dpif_netlink_flow_dump_next(struct dpif_flow_dump_thread *thread_, | |
1699 | struct dpif_flow *flows, int max_flows) | |
1700 | { | |
1701 | struct dpif_netlink_flow_dump_thread *thread | |
1702 | = dpif_netlink_flow_dump_thread_cast(thread_); | |
1703 | struct dpif_netlink_flow_dump *dump = thread->dump; | |
1704 | struct dpif_netlink *dpif = dpif_netlink_cast(thread->up.dpif); | |
1705 | int n_flows; | |
1706 | ||
1707 | ofpbuf_delete(thread->nl_actions); | |
1708 | thread->nl_actions = NULL; | |
1709 | ||
1710 | n_flows = 0; | |
1711 | max_flows = MIN(max_flows, FLOW_DUMP_MAX_BATCH); | |
1712 | ||
1713 | while (!thread->netdev_done && n_flows < max_flows) { | |
1714 | struct odputil_keybuf *maskbuf = &thread->maskbuf[n_flows]; | |
1715 | struct odputil_keybuf *keybuf = &thread->keybuf[n_flows]; | |
1716 | struct odputil_keybuf *actbuf = &thread->actbuf[n_flows]; | |
1717 | struct ofpbuf key, mask, act; | |
1718 | struct dpif_flow *f = &flows[n_flows]; | |
1719 | int cur = thread->netdev_dump_idx; | |
1720 | struct netdev_flow_dump *netdev_dump = dump->netdev_dumps[cur]; | |
1721 | struct match match; | |
1722 | struct nlattr *actions; | |
1723 | struct dpif_flow_stats stats; | |
1724 | struct dpif_flow_attrs attrs; | |
1725 | ovs_u128 ufid; | |
1726 | bool has_next; | |
1727 | ||
1728 | ofpbuf_use_stack(&key, keybuf, sizeof *keybuf); | |
1729 | ofpbuf_use_stack(&act, actbuf, sizeof *actbuf); | |
1730 | ofpbuf_use_stack(&mask, maskbuf, sizeof *maskbuf); | |
1731 | has_next = netdev_flow_dump_next(netdev_dump, &match, | |
1732 | &actions, &stats, &attrs, | |
1733 | &ufid, | |
1734 | &thread->nl_flows, | |
1735 | &act); | |
1736 | if (has_next) { | |
1737 | dpif_netlink_netdev_match_to_dpif_flow(&match, | |
1738 | &key, &mask, | |
1739 | actions, | |
1740 | &stats, | |
1741 | &attrs, | |
1742 | &ufid, | |
1743 | f, | |
1744 | dump->up.terse); | |
1745 | n_flows++; | |
1746 | } else { | |
1747 | dpif_netlink_advance_netdev_dump(thread); | |
1748 | } | |
1749 | } | |
1750 | ||
1751 | if (!(dump->types.ovs_flows)) { | |
1752 | return n_flows; | |
1753 | } | |
1754 | ||
1755 | while (!n_flows | |
1756 | || (n_flows < max_flows && thread->nl_flows.size)) { | |
1757 | struct dpif_netlink_flow datapath_flow; | |
1758 | struct ofpbuf nl_flow; | |
1759 | int error; | |
1760 | ||
1761 | /* Try to grab another flow. */ | |
1762 | if (!nl_dump_next(&dump->nl_dump, &nl_flow, &thread->nl_flows)) { | |
1763 | break; | |
1764 | } | |
1765 | ||
1766 | /* Convert the flow to our output format. */ | |
1767 | error = dpif_netlink_flow_from_ofpbuf(&datapath_flow, &nl_flow); | |
1768 | if (error) { | |
1769 | atomic_store_relaxed(&dump->status, error); | |
1770 | break; | |
1771 | } | |
1772 | ||
1773 | if (dump->up.terse || datapath_flow.actions) { | |
1774 | /* Common case: we don't want actions, or the flow includes | |
1775 | * actions. */ | |
1776 | dpif_netlink_flow_to_dpif_flow(&flows[n_flows++], &datapath_flow); | |
1777 | } else { | |
1778 | /* Rare case: the flow does not include actions. Retrieve this | |
1779 | * individual flow again to get the actions. */ | |
1780 | error = dpif_netlink_flow_get(dpif, &datapath_flow, | |
1781 | &datapath_flow, &thread->nl_actions); | |
1782 | if (error == ENOENT) { | |
1783 | VLOG_DBG("dumped flow disappeared on get"); | |
1784 | continue; | |
1785 | } else if (error) { | |
1786 | VLOG_WARN("error fetching dumped flow: %s", | |
1787 | ovs_strerror(error)); | |
1788 | atomic_store_relaxed(&dump->status, error); | |
1789 | break; | |
1790 | } | |
1791 | ||
1792 | /* Save this flow. Then exit, because we only have one buffer to | |
1793 | * handle this case. */ | |
1794 | dpif_netlink_flow_to_dpif_flow(&flows[n_flows++], &datapath_flow); | |
1795 | break; | |
1796 | } | |
1797 | } | |
1798 | return n_flows; | |
1799 | } | |
1800 | ||
1801 | static void | |
1802 | dpif_netlink_encode_execute(int dp_ifindex, const struct dpif_execute *d_exec, | |
1803 | struct ofpbuf *buf) | |
1804 | { | |
1805 | struct ovs_header *k_exec; | |
1806 | size_t key_ofs; | |
1807 | ||
1808 | ofpbuf_prealloc_tailroom(buf, (64 | |
1809 | + dp_packet_size(d_exec->packet) | |
1810 | + ODP_KEY_METADATA_SIZE | |
1811 | + d_exec->actions_len)); | |
1812 | ||
1813 | nl_msg_put_genlmsghdr(buf, 0, ovs_packet_family, NLM_F_REQUEST, | |
1814 | OVS_PACKET_CMD_EXECUTE, OVS_PACKET_VERSION); | |
1815 | ||
1816 | k_exec = ofpbuf_put_uninit(buf, sizeof *k_exec); | |
1817 | k_exec->dp_ifindex = dp_ifindex; | |
1818 | ||
1819 | nl_msg_put_unspec(buf, OVS_PACKET_ATTR_PACKET, | |
1820 | dp_packet_data(d_exec->packet), | |
1821 | dp_packet_size(d_exec->packet)); | |
1822 | ||
1823 | key_ofs = nl_msg_start_nested(buf, OVS_PACKET_ATTR_KEY); | |
1824 | odp_key_from_dp_packet(buf, d_exec->packet); | |
1825 | nl_msg_end_nested(buf, key_ofs); | |
1826 | ||
1827 | nl_msg_put_unspec(buf, OVS_PACKET_ATTR_ACTIONS, | |
1828 | d_exec->actions, d_exec->actions_len); | |
1829 | if (d_exec->probe) { | |
1830 | nl_msg_put_flag(buf, OVS_PACKET_ATTR_PROBE); | |
1831 | } | |
1832 | if (d_exec->mtu) { | |
1833 | nl_msg_put_u16(buf, OVS_PACKET_ATTR_MRU, d_exec->mtu); | |
1834 | } | |
1835 | ||
1836 | if (d_exec->hash) { | |
1837 | nl_msg_put_u64(buf, OVS_PACKET_ATTR_HASH, d_exec->hash); | |
1838 | } | |
1839 | } | |
1840 | ||
1841 | /* Executes, against 'dpif', up to the first 'n_ops' operations in 'ops'. | |
1842 | * Returns the number actually executed (at least 1, if 'n_ops' is | |
1843 | * positive). */ | |
1844 | static size_t | |
1845 | dpif_netlink_operate__(struct dpif_netlink *dpif, | |
1846 | struct dpif_op **ops, size_t n_ops) | |
1847 | { | |
1848 | struct op_auxdata { | |
1849 | struct nl_transaction txn; | |
1850 | ||
1851 | struct ofpbuf request; | |
1852 | uint64_t request_stub[1024 / 8]; | |
1853 | ||
1854 | struct ofpbuf reply; | |
1855 | uint64_t reply_stub[1024 / 8]; | |
1856 | } auxes[OPERATE_MAX_OPS]; | |
1857 | ||
1858 | struct nl_transaction *txnsp[OPERATE_MAX_OPS]; | |
1859 | size_t i; | |
1860 | ||
1861 | n_ops = MIN(n_ops, OPERATE_MAX_OPS); | |
1862 | for (i = 0; i < n_ops; i++) { | |
1863 | struct op_auxdata *aux = &auxes[i]; | |
1864 | struct dpif_op *op = ops[i]; | |
1865 | struct dpif_flow_put *put; | |
1866 | struct dpif_flow_del *del; | |
1867 | struct dpif_flow_get *get; | |
1868 | struct dpif_netlink_flow flow; | |
1869 | ||
1870 | ofpbuf_use_stub(&aux->request, | |
1871 | aux->request_stub, sizeof aux->request_stub); | |
1872 | aux->txn.request = &aux->request; | |
1873 | ||
1874 | ofpbuf_use_stub(&aux->reply, aux->reply_stub, sizeof aux->reply_stub); | |
1875 | aux->txn.reply = NULL; | |
1876 | ||
1877 | switch (op->type) { | |
1878 | case DPIF_OP_FLOW_PUT: | |
1879 | put = &op->flow_put; | |
1880 | dpif_netlink_init_flow_put(dpif, put, &flow); | |
1881 | if (put->stats) { | |
1882 | flow.nlmsg_flags |= NLM_F_ECHO; | |
1883 | aux->txn.reply = &aux->reply; | |
1884 | } | |
1885 | dpif_netlink_flow_to_ofpbuf(&flow, &aux->request); | |
1886 | break; | |
1887 | ||
1888 | case DPIF_OP_FLOW_DEL: | |
1889 | del = &op->flow_del; | |
1890 | dpif_netlink_init_flow_del(dpif, del, &flow); | |
1891 | if (del->stats) { | |
1892 | flow.nlmsg_flags |= NLM_F_ECHO; | |
1893 | aux->txn.reply = &aux->reply; | |
1894 | } | |
1895 | dpif_netlink_flow_to_ofpbuf(&flow, &aux->request); | |
1896 | break; | |
1897 | ||
1898 | case DPIF_OP_EXECUTE: | |
1899 | /* Can't execute a packet that won't fit in a Netlink attribute. */ | |
1900 | if (OVS_UNLIKELY(nl_attr_oversized( | |
1901 | dp_packet_size(op->execute.packet)))) { | |
1902 | /* Report an error immediately if this is the first operation. | |
1903 | * Otherwise the easiest thing to do is to postpone to the next | |
1904 | * call (when this will be the first operation). */ | |
1905 | if (i == 0) { | |
1906 | VLOG_ERR_RL(&error_rl, | |
1907 | "dropping oversized %"PRIu32"-byte packet", | |
1908 | dp_packet_size(op->execute.packet)); | |
1909 | op->error = ENOBUFS; | |
1910 | return 1; | |
1911 | } | |
1912 | n_ops = i; | |
1913 | } else { | |
1914 | dpif_netlink_encode_execute(dpif->dp_ifindex, &op->execute, | |
1915 | &aux->request); | |
1916 | } | |
1917 | break; | |
1918 | ||
1919 | case DPIF_OP_FLOW_GET: | |
1920 | get = &op->flow_get; | |
1921 | dpif_netlink_init_flow_get(dpif, get, &flow); | |
1922 | aux->txn.reply = get->buffer; | |
1923 | dpif_netlink_flow_to_ofpbuf(&flow, &aux->request); | |
1924 | break; | |
1925 | ||
1926 | default: | |
1927 | OVS_NOT_REACHED(); | |
1928 | } | |
1929 | } | |
1930 | ||
1931 | for (i = 0; i < n_ops; i++) { | |
1932 | txnsp[i] = &auxes[i].txn; | |
1933 | } | |
1934 | nl_transact_multiple(NETLINK_GENERIC, txnsp, n_ops); | |
1935 | ||
1936 | for (i = 0; i < n_ops; i++) { | |
1937 | struct op_auxdata *aux = &auxes[i]; | |
1938 | struct nl_transaction *txn = &auxes[i].txn; | |
1939 | struct dpif_op *op = ops[i]; | |
1940 | struct dpif_flow_put *put; | |
1941 | struct dpif_flow_del *del; | |
1942 | struct dpif_flow_get *get; | |
1943 | ||
1944 | op->error = txn->error; | |
1945 | ||
1946 | switch (op->type) { | |
1947 | case DPIF_OP_FLOW_PUT: | |
1948 | put = &op->flow_put; | |
1949 | if (put->stats) { | |
1950 | if (!op->error) { | |
1951 | struct dpif_netlink_flow reply; | |
1952 | ||
1953 | op->error = dpif_netlink_flow_from_ofpbuf(&reply, | |
1954 | txn->reply); | |
1955 | if (!op->error) { | |
1956 | dpif_netlink_flow_get_stats(&reply, put->stats); | |
1957 | } | |
1958 | } | |
1959 | } | |
1960 | break; | |
1961 | ||
1962 | case DPIF_OP_FLOW_DEL: | |
1963 | del = &op->flow_del; | |
1964 | if (del->stats) { | |
1965 | if (!op->error) { | |
1966 | struct dpif_netlink_flow reply; | |
1967 | ||
1968 | op->error = dpif_netlink_flow_from_ofpbuf(&reply, | |
1969 | txn->reply); | |
1970 | if (!op->error) { | |
1971 | dpif_netlink_flow_get_stats(&reply, del->stats); | |
1972 | } | |
1973 | } | |
1974 | } | |
1975 | break; | |
1976 | ||
1977 | case DPIF_OP_EXECUTE: | |
1978 | break; | |
1979 | ||
1980 | case DPIF_OP_FLOW_GET: | |
1981 | get = &op->flow_get; | |
1982 | if (!op->error) { | |
1983 | struct dpif_netlink_flow reply; | |
1984 | ||
1985 | op->error = dpif_netlink_flow_from_ofpbuf(&reply, txn->reply); | |
1986 | if (!op->error) { | |
1987 | dpif_netlink_flow_to_dpif_flow(get->flow, &reply); | |
1988 | } | |
1989 | } | |
1990 | break; | |
1991 | ||
1992 | default: | |
1993 | OVS_NOT_REACHED(); | |
1994 | } | |
1995 | ||
1996 | ofpbuf_uninit(&aux->request); | |
1997 | ofpbuf_uninit(&aux->reply); | |
1998 | } | |
1999 | ||
2000 | return n_ops; | |
2001 | } | |
2002 | ||
2003 | static int | |
2004 | parse_flow_get(struct dpif_netlink *dpif, struct dpif_flow_get *get) | |
2005 | { | |
2006 | const char *dpif_type_str = dpif_normalize_type(dpif_type(&dpif->dpif)); | |
2007 | struct dpif_flow *dpif_flow = get->flow; | |
2008 | struct match match; | |
2009 | struct nlattr *actions; | |
2010 | struct dpif_flow_stats stats; | |
2011 | struct dpif_flow_attrs attrs; | |
2012 | struct ofpbuf buf; | |
2013 | uint64_t act_buf[1024 / 8]; | |
2014 | struct odputil_keybuf maskbuf; | |
2015 | struct odputil_keybuf keybuf; | |
2016 | struct odputil_keybuf actbuf; | |
2017 | struct ofpbuf key, mask, act; | |
2018 | int err; | |
2019 | ||
2020 | ofpbuf_use_stack(&buf, &act_buf, sizeof act_buf); | |
2021 | err = netdev_ports_flow_get(dpif_type_str, &match, &actions, get->ufid, | |
2022 | &stats, &attrs, &buf); | |
2023 | if (err) { | |
2024 | return err; | |
2025 | } | |
2026 | ||
2027 | VLOG_DBG("found flow from netdev, translating to dpif flow"); | |
2028 | ||
2029 | ofpbuf_use_stack(&key, &keybuf, sizeof keybuf); | |
2030 | ofpbuf_use_stack(&act, &actbuf, sizeof actbuf); | |
2031 | ofpbuf_use_stack(&mask, &maskbuf, sizeof maskbuf); | |
2032 | dpif_netlink_netdev_match_to_dpif_flow(&match, &key, &mask, actions, | |
2033 | &stats, &attrs, | |
2034 | (ovs_u128 *) get->ufid, | |
2035 | dpif_flow, | |
2036 | false); | |
2037 | ofpbuf_put(get->buffer, nl_attr_get(actions), nl_attr_get_size(actions)); | |
2038 | dpif_flow->actions = ofpbuf_at(get->buffer, 0, 0); | |
2039 | dpif_flow->actions_len = nl_attr_get_size(actions); | |
2040 | ||
2041 | return 0; | |
2042 | } | |
2043 | ||
2044 | static int | |
2045 | parse_flow_put(struct dpif_netlink *dpif, struct dpif_flow_put *put) | |
2046 | { | |
2047 | const char *dpif_type_str = dpif_normalize_type(dpif_type(&dpif->dpif)); | |
2048 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20); | |
2049 | struct match match; | |
2050 | odp_port_t in_port; | |
2051 | const struct nlattr *nla; | |
2052 | size_t left; | |
2053 | struct netdev *dev; | |
2054 | struct offload_info info; | |
2055 | ovs_be16 dst_port = 0; | |
2056 | uint8_t csum_on = false; | |
2057 | int err; | |
2058 | ||
2059 | if (put->flags & DPIF_FP_PROBE) { | |
2060 | return EOPNOTSUPP; | |
2061 | } | |
2062 | ||
2063 | err = parse_key_and_mask_to_match(put->key, put->key_len, put->mask, | |
2064 | put->mask_len, &match); | |
2065 | if (err) { | |
2066 | return err; | |
2067 | } | |
2068 | ||
2069 | in_port = match.flow.in_port.odp_port; | |
2070 | dev = netdev_ports_get(in_port, dpif_type_str); | |
2071 | if (!dev) { | |
2072 | return EOPNOTSUPP; | |
2073 | } | |
2074 | ||
2075 | /* Get tunnel dst port */ | |
2076 | NL_ATTR_FOR_EACH(nla, left, put->actions, put->actions_len) { | |
2077 | if (nl_attr_type(nla) == OVS_ACTION_ATTR_OUTPUT) { | |
2078 | const struct netdev_tunnel_config *tnl_cfg; | |
2079 | struct netdev *outdev; | |
2080 | odp_port_t out_port; | |
2081 | ||
2082 | out_port = nl_attr_get_odp_port(nla); | |
2083 | outdev = netdev_ports_get(out_port, dpif_type_str); | |
2084 | if (!outdev) { | |
2085 | err = EOPNOTSUPP; | |
2086 | goto out; | |
2087 | } | |
2088 | tnl_cfg = netdev_get_tunnel_config(outdev); | |
2089 | if (tnl_cfg && tnl_cfg->dst_port != 0) { | |
2090 | dst_port = tnl_cfg->dst_port; | |
2091 | } | |
2092 | if (tnl_cfg) { | |
2093 | csum_on = tnl_cfg->csum; | |
2094 | } | |
2095 | netdev_close(outdev); | |
2096 | } | |
2097 | } | |
2098 | ||
2099 | info.tp_dst_port = dst_port; | |
2100 | info.tunnel_csum_on = csum_on; | |
2101 | info.recirc_id_shared_with_tc = (dpif->user_features | |
2102 | & OVS_DP_F_TC_RECIRC_SHARING); | |
2103 | info.tc_modify_flow_deleted = false; | |
2104 | err = netdev_flow_put(dev, &match, | |
2105 | CONST_CAST(struct nlattr *, put->actions), | |
2106 | put->actions_len, | |
2107 | CONST_CAST(ovs_u128 *, put->ufid), | |
2108 | &info, put->stats); | |
2109 | ||
2110 | if (!err) { | |
2111 | if (put->flags & DPIF_FP_MODIFY) { | |
2112 | struct dpif_op *opp; | |
2113 | struct dpif_op op; | |
2114 | ||
2115 | op.type = DPIF_OP_FLOW_DEL; | |
2116 | op.flow_del.key = put->key; | |
2117 | op.flow_del.key_len = put->key_len; | |
2118 | op.flow_del.ufid = put->ufid; | |
2119 | op.flow_del.pmd_id = put->pmd_id; | |
2120 | op.flow_del.stats = NULL; | |
2121 | op.flow_del.terse = false; | |
2122 | ||
2123 | opp = &op; | |
2124 | dpif_netlink_operate__(dpif, &opp, 1); | |
2125 | } | |
2126 | ||
2127 | VLOG_DBG("added flow"); | |
2128 | } else if (err != EEXIST) { | |
2129 | struct netdev *oor_netdev = NULL; | |
2130 | enum vlog_level level; | |
2131 | if (err == ENOSPC && netdev_is_offload_rebalance_policy_enabled()) { | |
2132 | /* | |
2133 | * We need to set OOR on the input netdev (i.e, 'dev') for the | |
2134 | * flow. But if the flow has a tunnel attribute (i.e, decap action, | |
2135 | * with a virtual device like a VxLAN interface as its in-port), | |
2136 | * then lookup and set OOR on the underlying tunnel (real) netdev. | |
2137 | */ | |
2138 | oor_netdev = flow_get_tunnel_netdev(&match.flow.tunnel); | |
2139 | if (!oor_netdev) { | |
2140 | /* Not a 'tunnel' flow */ | |
2141 | oor_netdev = dev; | |
2142 | } | |
2143 | netdev_set_hw_info(oor_netdev, HW_INFO_TYPE_OOR, true); | |
2144 | } | |
2145 | level = (err == ENOSPC || err == EOPNOTSUPP) ? VLL_DBG : VLL_ERR; | |
2146 | VLOG_RL(&rl, level, "failed to offload flow: %s: %s", | |
2147 | ovs_strerror(err), | |
2148 | (oor_netdev ? oor_netdev->name : dev->name)); | |
2149 | } | |
2150 | ||
2151 | out: | |
2152 | if (err && err != EEXIST && (put->flags & DPIF_FP_MODIFY)) { | |
2153 | /* Modified rule can't be offloaded, try and delete from HW */ | |
2154 | int del_err = 0; | |
2155 | ||
2156 | if (!info.tc_modify_flow_deleted) { | |
2157 | del_err = netdev_flow_del(dev, put->ufid, put->stats); | |
2158 | } | |
2159 | ||
2160 | if (!del_err) { | |
2161 | /* Delete from hw success, so old flow was offloaded. | |
2162 | * Change flags to create the flow in kernel */ | |
2163 | put->flags &= ~DPIF_FP_MODIFY; | |
2164 | put->flags |= DPIF_FP_CREATE; | |
2165 | } else if (del_err != ENOENT) { | |
2166 | VLOG_ERR_RL(&rl, "failed to delete offloaded flow: %s", | |
2167 | ovs_strerror(del_err)); | |
2168 | /* stop proccesing the flow in kernel */ | |
2169 | err = 0; | |
2170 | } | |
2171 | } | |
2172 | ||
2173 | netdev_close(dev); | |
2174 | ||
2175 | return err; | |
2176 | } | |
2177 | ||
2178 | static int | |
2179 | try_send_to_netdev(struct dpif_netlink *dpif, struct dpif_op *op) | |
2180 | { | |
2181 | int err = EOPNOTSUPP; | |
2182 | ||
2183 | switch (op->type) { | |
2184 | case DPIF_OP_FLOW_PUT: { | |
2185 | struct dpif_flow_put *put = &op->flow_put; | |
2186 | ||
2187 | if (!put->ufid) { | |
2188 | break; | |
2189 | } | |
2190 | ||
2191 | err = parse_flow_put(dpif, put); | |
2192 | log_flow_put_message(&dpif->dpif, &this_module, put, 0); | |
2193 | break; | |
2194 | } | |
2195 | case DPIF_OP_FLOW_DEL: { | |
2196 | struct dpif_flow_del *del = &op->flow_del; | |
2197 | ||
2198 | if (!del->ufid) { | |
2199 | break; | |
2200 | } | |
2201 | ||
2202 | err = netdev_ports_flow_del( | |
2203 | dpif_normalize_type(dpif_type(&dpif->dpif)), | |
2204 | del->ufid, | |
2205 | del->stats); | |
2206 | log_flow_del_message(&dpif->dpif, &this_module, del, 0); | |
2207 | break; | |
2208 | } | |
2209 | case DPIF_OP_FLOW_GET: { | |
2210 | struct dpif_flow_get *get = &op->flow_get; | |
2211 | ||
2212 | if (!op->flow_get.ufid) { | |
2213 | break; | |
2214 | } | |
2215 | ||
2216 | err = parse_flow_get(dpif, get); | |
2217 | log_flow_get_message(&dpif->dpif, &this_module, get, 0); | |
2218 | break; | |
2219 | } | |
2220 | case DPIF_OP_EXECUTE: | |
2221 | default: | |
2222 | break; | |
2223 | } | |
2224 | ||
2225 | return err; | |
2226 | } | |
2227 | ||
2228 | static void | |
2229 | dpif_netlink_operate_chunks(struct dpif_netlink *dpif, struct dpif_op **ops, | |
2230 | size_t n_ops) | |
2231 | { | |
2232 | while (n_ops > 0) { | |
2233 | size_t chunk = dpif_netlink_operate__(dpif, ops, n_ops); | |
2234 | ||
2235 | ops += chunk; | |
2236 | n_ops -= chunk; | |
2237 | } | |
2238 | } | |
2239 | ||
2240 | static void | |
2241 | dpif_netlink_operate(struct dpif *dpif_, struct dpif_op **ops, size_t n_ops, | |
2242 | enum dpif_offload_type offload_type) | |
2243 | { | |
2244 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
2245 | struct dpif_op *new_ops[OPERATE_MAX_OPS]; | |
2246 | int count = 0; | |
2247 | int i = 0; | |
2248 | int err = 0; | |
2249 | ||
2250 | if (offload_type == DPIF_OFFLOAD_ALWAYS && !netdev_is_flow_api_enabled()) { | |
2251 | VLOG_DBG("Invalid offload_type: %d", offload_type); | |
2252 | return; | |
2253 | } | |
2254 | ||
2255 | if (offload_type != DPIF_OFFLOAD_NEVER && netdev_is_flow_api_enabled()) { | |
2256 | while (n_ops > 0) { | |
2257 | count = 0; | |
2258 | ||
2259 | while (n_ops > 0 && count < OPERATE_MAX_OPS) { | |
2260 | struct dpif_op *op = ops[i++]; | |
2261 | ||
2262 | err = try_send_to_netdev(dpif, op); | |
2263 | if (err && err != EEXIST) { | |
2264 | if (offload_type == DPIF_OFFLOAD_ALWAYS) { | |
2265 | /* We got an error while offloading an op. Since | |
2266 | * OFFLOAD_ALWAYS is specified, we stop further | |
2267 | * processing and return to the caller without | |
2268 | * invoking kernel datapath as fallback. But the | |
2269 | * interface requires us to process all n_ops; so | |
2270 | * return the same error in the remaining ops too. | |
2271 | */ | |
2272 | op->error = err; | |
2273 | n_ops--; | |
2274 | while (n_ops > 0) { | |
2275 | op = ops[i++]; | |
2276 | op->error = err; | |
2277 | n_ops--; | |
2278 | } | |
2279 | return; | |
2280 | } | |
2281 | new_ops[count++] = op; | |
2282 | } else { | |
2283 | op->error = err; | |
2284 | } | |
2285 | ||
2286 | n_ops--; | |
2287 | } | |
2288 | ||
2289 | dpif_netlink_operate_chunks(dpif, new_ops, count); | |
2290 | } | |
2291 | } else if (offload_type != DPIF_OFFLOAD_ALWAYS) { | |
2292 | dpif_netlink_operate_chunks(dpif, ops, n_ops); | |
2293 | } | |
2294 | } | |
2295 | ||
2296 | #if _WIN32 | |
2297 | static void | |
2298 | dpif_netlink_handler_uninit(struct dpif_handler *handler) | |
2299 | { | |
2300 | vport_delete_sock_pool(handler); | |
2301 | } | |
2302 | ||
2303 | static int | |
2304 | dpif_netlink_handler_init(struct dpif_handler *handler) | |
2305 | { | |
2306 | return vport_create_sock_pool(handler); | |
2307 | } | |
2308 | #else | |
2309 | ||
2310 | static int | |
2311 | dpif_netlink_handler_init(struct dpif_handler *handler) | |
2312 | { | |
2313 | handler->epoll_fd = epoll_create(10); | |
2314 | return handler->epoll_fd < 0 ? errno : 0; | |
2315 | } | |
2316 | ||
2317 | static void | |
2318 | dpif_netlink_handler_uninit(struct dpif_handler *handler) | |
2319 | { | |
2320 | close(handler->epoll_fd); | |
2321 | } | |
2322 | #endif | |
2323 | ||
2324 | /* Synchronizes 'channels' in 'dpif->handlers' with the set of vports | |
2325 | * currently in 'dpif' in the kernel, by adding a new set of channels for | |
2326 | * any kernel vport that lacks one and deleting any channels that have no | |
2327 | * backing kernel vports. */ | |
2328 | static int | |
2329 | dpif_netlink_refresh_channels(struct dpif_netlink *dpif, uint32_t n_handlers) | |
2330 | OVS_REQ_WRLOCK(dpif->upcall_lock) | |
2331 | { | |
2332 | unsigned long int *keep_channels; | |
2333 | struct dpif_netlink_vport vport; | |
2334 | size_t keep_channels_nbits; | |
2335 | struct nl_dump dump; | |
2336 | uint64_t reply_stub[NL_DUMP_BUFSIZE / 8]; | |
2337 | struct ofpbuf buf; | |
2338 | int retval = 0; | |
2339 | size_t i; | |
2340 | ||
2341 | ovs_assert(!WINDOWS || n_handlers <= 1); | |
2342 | ovs_assert(!WINDOWS || dpif->n_handlers <= 1); | |
2343 | ||
2344 | if (dpif->n_handlers != n_handlers) { | |
2345 | destroy_all_channels(dpif); | |
2346 | dpif->handlers = xzalloc(n_handlers * sizeof *dpif->handlers); | |
2347 | for (i = 0; i < n_handlers; i++) { | |
2348 | int error; | |
2349 | struct dpif_handler *handler = &dpif->handlers[i]; | |
2350 | ||
2351 | error = dpif_netlink_handler_init(handler); | |
2352 | if (error) { | |
2353 | size_t j; | |
2354 | ||
2355 | for (j = 0; j < i; j++) { | |
2356 | struct dpif_handler *tmp = &dpif->handlers[j]; | |
2357 | dpif_netlink_handler_uninit(tmp); | |
2358 | } | |
2359 | free(dpif->handlers); | |
2360 | dpif->handlers = NULL; | |
2361 | ||
2362 | return error; | |
2363 | } | |
2364 | } | |
2365 | dpif->n_handlers = n_handlers; | |
2366 | } | |
2367 | ||
2368 | for (i = 0; i < n_handlers; i++) { | |
2369 | struct dpif_handler *handler = &dpif->handlers[i]; | |
2370 | ||
2371 | handler->event_offset = handler->n_events = 0; | |
2372 | } | |
2373 | ||
2374 | keep_channels_nbits = dpif->uc_array_size; | |
2375 | keep_channels = bitmap_allocate(keep_channels_nbits); | |
2376 | ||
2377 | ofpbuf_use_stub(&buf, reply_stub, sizeof reply_stub); | |
2378 | dpif_netlink_port_dump_start__(dpif, &dump); | |
2379 | while (!dpif_netlink_port_dump_next__(dpif, &dump, &vport, &buf)) { | |
2380 | uint32_t port_no = odp_to_u32(vport.port_no); | |
2381 | uint32_t upcall_pid; | |
2382 | int error; | |
2383 | ||
2384 | if (port_no >= dpif->uc_array_size | |
2385 | || !vport_get_pid(dpif, port_no, &upcall_pid)) { | |
2386 | struct nl_sock *sock; | |
2387 | error = create_nl_sock(dpif, &sock); | |
2388 | ||
2389 | if (error) { | |
2390 | goto error; | |
2391 | } | |
2392 | ||
2393 | error = vport_add_channel(dpif, vport.port_no, sock); | |
2394 | if (error) { | |
2395 | VLOG_INFO("%s: could not add channels for port %s", | |
2396 | dpif_name(&dpif->dpif), vport.name); | |
2397 | nl_sock_destroy(sock); | |
2398 | retval = error; | |
2399 | goto error; | |
2400 | } | |
2401 | upcall_pid = nl_sock_pid(sock); | |
2402 | } | |
2403 | ||
2404 | /* Configure the vport to deliver misses to 'sock'. */ | |
2405 | if (vport.upcall_pids[0] == 0 | |
2406 | || vport.n_upcall_pids != 1 | |
2407 | || upcall_pid != vport.upcall_pids[0]) { | |
2408 | struct dpif_netlink_vport vport_request; | |
2409 | ||
2410 | dpif_netlink_vport_init(&vport_request); | |
2411 | vport_request.cmd = OVS_VPORT_CMD_SET; | |
2412 | vport_request.dp_ifindex = dpif->dp_ifindex; | |
2413 | vport_request.port_no = vport.port_no; | |
2414 | vport_request.n_upcall_pids = 1; | |
2415 | vport_request.upcall_pids = &upcall_pid; | |
2416 | error = dpif_netlink_vport_transact(&vport_request, NULL, NULL); | |
2417 | if (error) { | |
2418 | VLOG_WARN_RL(&error_rl, | |
2419 | "%s: failed to set upcall pid on port: %s", | |
2420 | dpif_name(&dpif->dpif), ovs_strerror(error)); | |
2421 | ||
2422 | if (error != ENODEV && error != ENOENT) { | |
2423 | retval = error; | |
2424 | } else { | |
2425 | /* The vport isn't really there, even though the dump says | |
2426 | * it is. Probably we just hit a race after a port | |
2427 | * disappeared. */ | |
2428 | } | |
2429 | goto error; | |
2430 | } | |
2431 | } | |
2432 | ||
2433 | if (port_no < keep_channels_nbits) { | |
2434 | bitmap_set1(keep_channels, port_no); | |
2435 | } | |
2436 | continue; | |
2437 | ||
2438 | error: | |
2439 | vport_del_channels(dpif, vport.port_no); | |
2440 | } | |
2441 | nl_dump_done(&dump); | |
2442 | ofpbuf_uninit(&buf); | |
2443 | ||
2444 | /* Discard any saved channels that we didn't reuse. */ | |
2445 | for (i = 0; i < keep_channels_nbits; i++) { | |
2446 | if (!bitmap_is_set(keep_channels, i)) { | |
2447 | vport_del_channels(dpif, u32_to_odp(i)); | |
2448 | } | |
2449 | } | |
2450 | free(keep_channels); | |
2451 | ||
2452 | return retval; | |
2453 | } | |
2454 | ||
2455 | static int | |
2456 | dpif_netlink_recv_set__(struct dpif_netlink *dpif, bool enable) | |
2457 | OVS_REQ_WRLOCK(dpif->upcall_lock) | |
2458 | { | |
2459 | if ((dpif->handlers != NULL) == enable) { | |
2460 | return 0; | |
2461 | } else if (!enable) { | |
2462 | destroy_all_channels(dpif); | |
2463 | return 0; | |
2464 | } else { | |
2465 | return dpif_netlink_refresh_channels(dpif, 1); | |
2466 | } | |
2467 | } | |
2468 | ||
2469 | static int | |
2470 | dpif_netlink_recv_set(struct dpif *dpif_, bool enable) | |
2471 | { | |
2472 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
2473 | int error; | |
2474 | ||
2475 | fat_rwlock_wrlock(&dpif->upcall_lock); | |
2476 | error = dpif_netlink_recv_set__(dpif, enable); | |
2477 | fat_rwlock_unlock(&dpif->upcall_lock); | |
2478 | ||
2479 | return error; | |
2480 | } | |
2481 | ||
2482 | static int | |
2483 | dpif_netlink_handlers_set(struct dpif *dpif_, uint32_t n_handlers) | |
2484 | { | |
2485 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
2486 | int error = 0; | |
2487 | ||
2488 | #ifdef _WIN32 | |
2489 | /* Multiple upcall handlers will be supported once kernel datapath supports | |
2490 | * it. */ | |
2491 | if (n_handlers > 1) { | |
2492 | return error; | |
2493 | } | |
2494 | #endif | |
2495 | ||
2496 | fat_rwlock_wrlock(&dpif->upcall_lock); | |
2497 | if (dpif->handlers) { | |
2498 | error = dpif_netlink_refresh_channels(dpif, n_handlers); | |
2499 | } | |
2500 | fat_rwlock_unlock(&dpif->upcall_lock); | |
2501 | ||
2502 | return error; | |
2503 | } | |
2504 | ||
2505 | static int | |
2506 | dpif_netlink_queue_to_priority(const struct dpif *dpif OVS_UNUSED, | |
2507 | uint32_t queue_id, uint32_t *priority) | |
2508 | { | |
2509 | if (queue_id < 0xf000) { | |
2510 | *priority = TC_H_MAKE(1 << 16, queue_id + 1); | |
2511 | return 0; | |
2512 | } else { | |
2513 | return EINVAL; | |
2514 | } | |
2515 | } | |
2516 | ||
2517 | static int | |
2518 | parse_odp_packet(struct ofpbuf *buf, struct dpif_upcall *upcall, | |
2519 | int *dp_ifindex) | |
2520 | { | |
2521 | static const struct nl_policy ovs_packet_policy[] = { | |
2522 | /* Always present. */ | |
2523 | [OVS_PACKET_ATTR_PACKET] = { .type = NL_A_UNSPEC, | |
2524 | .min_len = ETH_HEADER_LEN }, | |
2525 | [OVS_PACKET_ATTR_KEY] = { .type = NL_A_NESTED }, | |
2526 | ||
2527 | /* OVS_PACKET_CMD_ACTION only. */ | |
2528 | [OVS_PACKET_ATTR_USERDATA] = { .type = NL_A_UNSPEC, .optional = true }, | |
2529 | [OVS_PACKET_ATTR_EGRESS_TUN_KEY] = { .type = NL_A_NESTED, .optional = true }, | |
2530 | [OVS_PACKET_ATTR_ACTIONS] = { .type = NL_A_NESTED, .optional = true }, | |
2531 | [OVS_PACKET_ATTR_MRU] = { .type = NL_A_U16, .optional = true }, | |
2532 | [OVS_PACKET_ATTR_HASH] = { .type = NL_A_U64, .optional = true } | |
2533 | }; | |
2534 | ||
2535 | struct ofpbuf b = ofpbuf_const_initializer(buf->data, buf->size); | |
2536 | struct nlmsghdr *nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); | |
2537 | struct genlmsghdr *genl = ofpbuf_try_pull(&b, sizeof *genl); | |
2538 | struct ovs_header *ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); | |
2539 | ||
2540 | struct nlattr *a[ARRAY_SIZE(ovs_packet_policy)]; | |
2541 | if (!nlmsg || !genl || !ovs_header | |
2542 | || nlmsg->nlmsg_type != ovs_packet_family | |
2543 | || !nl_policy_parse(&b, 0, ovs_packet_policy, a, | |
2544 | ARRAY_SIZE(ovs_packet_policy))) { | |
2545 | return EINVAL; | |
2546 | } | |
2547 | ||
2548 | int type = (genl->cmd == OVS_PACKET_CMD_MISS ? DPIF_UC_MISS | |
2549 | : genl->cmd == OVS_PACKET_CMD_ACTION ? DPIF_UC_ACTION | |
2550 | : -1); | |
2551 | if (type < 0) { | |
2552 | return EINVAL; | |
2553 | } | |
2554 | ||
2555 | /* (Re)set ALL fields of '*upcall' on successful return. */ | |
2556 | upcall->type = type; | |
2557 | upcall->key = CONST_CAST(struct nlattr *, | |
2558 | nl_attr_get(a[OVS_PACKET_ATTR_KEY])); | |
2559 | upcall->key_len = nl_attr_get_size(a[OVS_PACKET_ATTR_KEY]); | |
2560 | odp_flow_key_hash(upcall->key, upcall->key_len, &upcall->ufid); | |
2561 | upcall->userdata = a[OVS_PACKET_ATTR_USERDATA]; | |
2562 | upcall->out_tun_key = a[OVS_PACKET_ATTR_EGRESS_TUN_KEY]; | |
2563 | upcall->actions = a[OVS_PACKET_ATTR_ACTIONS]; | |
2564 | upcall->mru = a[OVS_PACKET_ATTR_MRU]; | |
2565 | upcall->hash = a[OVS_PACKET_ATTR_HASH]; | |
2566 | ||
2567 | /* Allow overwriting the netlink attribute header without reallocating. */ | |
2568 | dp_packet_use_stub(&upcall->packet, | |
2569 | CONST_CAST(struct nlattr *, | |
2570 | nl_attr_get(a[OVS_PACKET_ATTR_PACKET])) - 1, | |
2571 | nl_attr_get_size(a[OVS_PACKET_ATTR_PACKET]) + | |
2572 | sizeof(struct nlattr)); | |
2573 | dp_packet_set_data(&upcall->packet, | |
2574 | (char *)dp_packet_data(&upcall->packet) + sizeof(struct nlattr)); | |
2575 | dp_packet_set_size(&upcall->packet, nl_attr_get_size(a[OVS_PACKET_ATTR_PACKET])); | |
2576 | ||
2577 | if (nl_attr_find__(upcall->key, upcall->key_len, OVS_KEY_ATTR_ETHERNET)) { | |
2578 | /* Ethernet frame */ | |
2579 | upcall->packet.packet_type = htonl(PT_ETH); | |
2580 | } else { | |
2581 | /* Non-Ethernet packet. Get the Ethertype from the NL attributes */ | |
2582 | ovs_be16 ethertype = 0; | |
2583 | const struct nlattr *et_nla = nl_attr_find__(upcall->key, | |
2584 | upcall->key_len, | |
2585 | OVS_KEY_ATTR_ETHERTYPE); | |
2586 | if (et_nla) { | |
2587 | ethertype = nl_attr_get_be16(et_nla); | |
2588 | } | |
2589 | upcall->packet.packet_type = PACKET_TYPE_BE(OFPHTN_ETHERTYPE, | |
2590 | ntohs(ethertype)); | |
2591 | dp_packet_set_l3(&upcall->packet, dp_packet_data(&upcall->packet)); | |
2592 | } | |
2593 | ||
2594 | *dp_ifindex = ovs_header->dp_ifindex; | |
2595 | ||
2596 | return 0; | |
2597 | } | |
2598 | ||
2599 | #ifdef _WIN32 | |
2600 | #define PACKET_RECV_BATCH_SIZE 50 | |
2601 | static int | |
2602 | dpif_netlink_recv_windows(struct dpif_netlink *dpif, uint32_t handler_id, | |
2603 | struct dpif_upcall *upcall, struct ofpbuf *buf) | |
2604 | OVS_REQ_RDLOCK(dpif->upcall_lock) | |
2605 | { | |
2606 | struct dpif_handler *handler; | |
2607 | int read_tries = 0; | |
2608 | struct dpif_windows_vport_sock *sock_pool; | |
2609 | uint32_t i; | |
2610 | ||
2611 | if (!dpif->handlers) { | |
2612 | return EAGAIN; | |
2613 | } | |
2614 | ||
2615 | /* Only one handler is supported currently. */ | |
2616 | if (handler_id >= 1) { | |
2617 | return EAGAIN; | |
2618 | } | |
2619 | ||
2620 | if (handler_id >= dpif->n_handlers) { | |
2621 | return EAGAIN; | |
2622 | } | |
2623 | ||
2624 | handler = &dpif->handlers[handler_id]; | |
2625 | sock_pool = handler->vport_sock_pool; | |
2626 | ||
2627 | for (i = 0; i < VPORT_SOCK_POOL_SIZE; i++) { | |
2628 | for (;;) { | |
2629 | int dp_ifindex; | |
2630 | int error; | |
2631 | ||
2632 | if (++read_tries > PACKET_RECV_BATCH_SIZE) { | |
2633 | return EAGAIN; | |
2634 | } | |
2635 | ||
2636 | error = nl_sock_recv(sock_pool[i].nl_sock, buf, NULL, false); | |
2637 | if (error == ENOBUFS) { | |
2638 | /* ENOBUFS typically means that we've received so many | |
2639 | * packets that the buffer overflowed. Try again | |
2640 | * immediately because there's almost certainly a packet | |
2641 | * waiting for us. */ | |
2642 | /* XXX: report_loss(dpif, ch, idx, handler_id); */ | |
2643 | continue; | |
2644 | } | |
2645 | ||
2646 | /* XXX: ch->last_poll = time_msec(); */ | |
2647 | if (error) { | |
2648 | if (error == EAGAIN) { | |
2649 | break; | |
2650 | } | |
2651 | return error; | |
2652 | } | |
2653 | ||
2654 | error = parse_odp_packet(buf, upcall, &dp_ifindex); | |
2655 | if (!error && dp_ifindex == dpif->dp_ifindex) { | |
2656 | return 0; | |
2657 | } else if (error) { | |
2658 | return error; | |
2659 | } | |
2660 | } | |
2661 | } | |
2662 | ||
2663 | return EAGAIN; | |
2664 | } | |
2665 | #else | |
2666 | static int | |
2667 | dpif_netlink_recv__(struct dpif_netlink *dpif, uint32_t handler_id, | |
2668 | struct dpif_upcall *upcall, struct ofpbuf *buf) | |
2669 | OVS_REQ_RDLOCK(dpif->upcall_lock) | |
2670 | { | |
2671 | struct dpif_handler *handler; | |
2672 | int read_tries = 0; | |
2673 | ||
2674 | if (!dpif->handlers || handler_id >= dpif->n_handlers) { | |
2675 | return EAGAIN; | |
2676 | } | |
2677 | ||
2678 | handler = &dpif->handlers[handler_id]; | |
2679 | if (handler->event_offset >= handler->n_events) { | |
2680 | int retval; | |
2681 | ||
2682 | handler->event_offset = handler->n_events = 0; | |
2683 | ||
2684 | do { | |
2685 | retval = epoll_wait(handler->epoll_fd, handler->epoll_events, | |
2686 | dpif->uc_array_size, 0); | |
2687 | } while (retval < 0 && errno == EINTR); | |
2688 | ||
2689 | if (retval < 0) { | |
2690 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); | |
2691 | VLOG_WARN_RL(&rl, "epoll_wait failed (%s)", ovs_strerror(errno)); | |
2692 | } else if (retval > 0) { | |
2693 | handler->n_events = retval; | |
2694 | } | |
2695 | } | |
2696 | ||
2697 | while (handler->event_offset < handler->n_events) { | |
2698 | int idx = handler->epoll_events[handler->event_offset].data.u32; | |
2699 | struct dpif_channel *ch = &dpif->channels[idx]; | |
2700 | ||
2701 | handler->event_offset++; | |
2702 | ||
2703 | for (;;) { | |
2704 | int dp_ifindex; | |
2705 | int error; | |
2706 | ||
2707 | if (++read_tries > 50) { | |
2708 | return EAGAIN; | |
2709 | } | |
2710 | ||
2711 | error = nl_sock_recv(ch->sock, buf, NULL, false); | |
2712 | if (error == ENOBUFS) { | |
2713 | /* ENOBUFS typically means that we've received so many | |
2714 | * packets that the buffer overflowed. Try again | |
2715 | * immediately because there's almost certainly a packet | |
2716 | * waiting for us. */ | |
2717 | report_loss(dpif, ch, idx, handler_id); | |
2718 | continue; | |
2719 | } | |
2720 | ||
2721 | ch->last_poll = time_msec(); | |
2722 | if (error) { | |
2723 | if (error == EAGAIN) { | |
2724 | break; | |
2725 | } | |
2726 | return error; | |
2727 | } | |
2728 | ||
2729 | error = parse_odp_packet(buf, upcall, &dp_ifindex); | |
2730 | if (!error && dp_ifindex == dpif->dp_ifindex) { | |
2731 | return 0; | |
2732 | } else if (error) { | |
2733 | return error; | |
2734 | } | |
2735 | } | |
2736 | } | |
2737 | ||
2738 | return EAGAIN; | |
2739 | } | |
2740 | #endif | |
2741 | ||
2742 | static int | |
2743 | dpif_netlink_recv(struct dpif *dpif_, uint32_t handler_id, | |
2744 | struct dpif_upcall *upcall, struct ofpbuf *buf) | |
2745 | { | |
2746 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
2747 | int error; | |
2748 | ||
2749 | fat_rwlock_rdlock(&dpif->upcall_lock); | |
2750 | #ifdef _WIN32 | |
2751 | error = dpif_netlink_recv_windows(dpif, handler_id, upcall, buf); | |
2752 | #else | |
2753 | error = dpif_netlink_recv__(dpif, handler_id, upcall, buf); | |
2754 | #endif | |
2755 | fat_rwlock_unlock(&dpif->upcall_lock); | |
2756 | ||
2757 | return error; | |
2758 | } | |
2759 | ||
2760 | static void | |
2761 | dpif_netlink_recv_wait__(struct dpif_netlink *dpif, uint32_t handler_id) | |
2762 | OVS_REQ_RDLOCK(dpif->upcall_lock) | |
2763 | { | |
2764 | #ifdef _WIN32 | |
2765 | uint32_t i; | |
2766 | struct dpif_windows_vport_sock *sock_pool = | |
2767 | dpif->handlers[handler_id].vport_sock_pool; | |
2768 | ||
2769 | /* Only one handler is supported currently. */ | |
2770 | if (handler_id >= 1) { | |
2771 | return; | |
2772 | } | |
2773 | ||
2774 | for (i = 0; i < VPORT_SOCK_POOL_SIZE; i++) { | |
2775 | nl_sock_wait(sock_pool[i].nl_sock, POLLIN); | |
2776 | } | |
2777 | #else | |
2778 | if (dpif->handlers && handler_id < dpif->n_handlers) { | |
2779 | struct dpif_handler *handler = &dpif->handlers[handler_id]; | |
2780 | ||
2781 | poll_fd_wait(handler->epoll_fd, POLLIN); | |
2782 | } | |
2783 | #endif | |
2784 | } | |
2785 | ||
2786 | static void | |
2787 | dpif_netlink_recv_wait(struct dpif *dpif_, uint32_t handler_id) | |
2788 | { | |
2789 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
2790 | ||
2791 | fat_rwlock_rdlock(&dpif->upcall_lock); | |
2792 | dpif_netlink_recv_wait__(dpif, handler_id); | |
2793 | fat_rwlock_unlock(&dpif->upcall_lock); | |
2794 | } | |
2795 | ||
2796 | static void | |
2797 | dpif_netlink_recv_purge__(struct dpif_netlink *dpif) | |
2798 | OVS_REQ_WRLOCK(dpif->upcall_lock) | |
2799 | { | |
2800 | if (dpif->handlers) { | |
2801 | size_t i; | |
2802 | ||
2803 | if (!dpif->channels[0].sock) { | |
2804 | return; | |
2805 | } | |
2806 | for (i = 0; i < dpif->uc_array_size; i++ ) { | |
2807 | ||
2808 | nl_sock_drain(dpif->channels[i].sock); | |
2809 | } | |
2810 | } | |
2811 | } | |
2812 | ||
2813 | static void | |
2814 | dpif_netlink_recv_purge(struct dpif *dpif_) | |
2815 | { | |
2816 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
2817 | ||
2818 | fat_rwlock_wrlock(&dpif->upcall_lock); | |
2819 | dpif_netlink_recv_purge__(dpif); | |
2820 | fat_rwlock_unlock(&dpif->upcall_lock); | |
2821 | } | |
2822 | ||
2823 | static char * | |
2824 | dpif_netlink_get_datapath_version(void) | |
2825 | { | |
2826 | char *version_str = NULL; | |
2827 | ||
2828 | #ifdef __linux__ | |
2829 | ||
2830 | #define MAX_VERSION_STR_SIZE 80 | |
2831 | #define LINUX_DATAPATH_VERSION_FILE "/sys/module/openvswitch/version" | |
2832 | FILE *f; | |
2833 | ||
2834 | f = fopen(LINUX_DATAPATH_VERSION_FILE, "r"); | |
2835 | if (f) { | |
2836 | char *newline; | |
2837 | char version[MAX_VERSION_STR_SIZE]; | |
2838 | ||
2839 | if (fgets(version, MAX_VERSION_STR_SIZE, f)) { | |
2840 | newline = strchr(version, '\n'); | |
2841 | if (newline) { | |
2842 | *newline = '\0'; | |
2843 | } | |
2844 | version_str = xstrdup(version); | |
2845 | } | |
2846 | fclose(f); | |
2847 | } | |
2848 | #endif | |
2849 | ||
2850 | return version_str; | |
2851 | } | |
2852 | ||
2853 | struct dpif_netlink_ct_dump_state { | |
2854 | struct ct_dpif_dump_state up; | |
2855 | struct nl_ct_dump_state *nl_ct_dump; | |
2856 | }; | |
2857 | ||
2858 | static int | |
2859 | dpif_netlink_ct_dump_start(struct dpif *dpif OVS_UNUSED, | |
2860 | struct ct_dpif_dump_state **dump_, | |
2861 | const uint16_t *zone, int *ptot_bkts) | |
2862 | { | |
2863 | struct dpif_netlink_ct_dump_state *dump; | |
2864 | int err; | |
2865 | ||
2866 | dump = xzalloc(sizeof *dump); | |
2867 | err = nl_ct_dump_start(&dump->nl_ct_dump, zone, ptot_bkts); | |
2868 | if (err) { | |
2869 | free(dump); | |
2870 | return err; | |
2871 | } | |
2872 | ||
2873 | *dump_ = &dump->up; | |
2874 | ||
2875 | return 0; | |
2876 | } | |
2877 | ||
2878 | static int | |
2879 | dpif_netlink_ct_dump_next(struct dpif *dpif OVS_UNUSED, | |
2880 | struct ct_dpif_dump_state *dump_, | |
2881 | struct ct_dpif_entry *entry) | |
2882 | { | |
2883 | struct dpif_netlink_ct_dump_state *dump; | |
2884 | ||
2885 | INIT_CONTAINER(dump, dump_, up); | |
2886 | ||
2887 | return nl_ct_dump_next(dump->nl_ct_dump, entry); | |
2888 | } | |
2889 | ||
2890 | static int | |
2891 | dpif_netlink_ct_dump_done(struct dpif *dpif OVS_UNUSED, | |
2892 | struct ct_dpif_dump_state *dump_) | |
2893 | { | |
2894 | struct dpif_netlink_ct_dump_state *dump; | |
2895 | ||
2896 | INIT_CONTAINER(dump, dump_, up); | |
2897 | ||
2898 | int err = nl_ct_dump_done(dump->nl_ct_dump); | |
2899 | free(dump); | |
2900 | return err; | |
2901 | } | |
2902 | ||
2903 | static int | |
2904 | dpif_netlink_ct_flush(struct dpif *dpif OVS_UNUSED, const uint16_t *zone, | |
2905 | const struct ct_dpif_tuple *tuple) | |
2906 | { | |
2907 | if (tuple) { | |
2908 | return nl_ct_flush_tuple(tuple, zone ? *zone : 0); | |
2909 | } else if (zone) { | |
2910 | return nl_ct_flush_zone(*zone); | |
2911 | } else { | |
2912 | return nl_ct_flush(); | |
2913 | } | |
2914 | } | |
2915 | ||
2916 | static int | |
2917 | dpif_netlink_ct_set_limits(struct dpif *dpif OVS_UNUSED, | |
2918 | const uint32_t *default_limits, | |
2919 | const struct ovs_list *zone_limits) | |
2920 | { | |
2921 | struct ovs_zone_limit req_zone_limit; | |
2922 | ||
2923 | if (ovs_ct_limit_family < 0) { | |
2924 | return EOPNOTSUPP; | |
2925 | } | |
2926 | ||
2927 | struct ofpbuf *request = ofpbuf_new(NL_DUMP_BUFSIZE); | |
2928 | nl_msg_put_genlmsghdr(request, 0, ovs_ct_limit_family, | |
2929 | NLM_F_REQUEST | NLM_F_ECHO, OVS_CT_LIMIT_CMD_SET, | |
2930 | OVS_CT_LIMIT_VERSION); | |
2931 | ||
2932 | struct ovs_header *ovs_header; | |
2933 | ovs_header = ofpbuf_put_uninit(request, sizeof *ovs_header); | |
2934 | ovs_header->dp_ifindex = 0; | |
2935 | ||
2936 | size_t opt_offset; | |
2937 | opt_offset = nl_msg_start_nested(request, OVS_CT_LIMIT_ATTR_ZONE_LIMIT); | |
2938 | if (default_limits) { | |
2939 | req_zone_limit.zone_id = OVS_ZONE_LIMIT_DEFAULT_ZONE; | |
2940 | req_zone_limit.limit = *default_limits; | |
2941 | nl_msg_put(request, &req_zone_limit, sizeof req_zone_limit); | |
2942 | } | |
2943 | ||
2944 | if (!ovs_list_is_empty(zone_limits)) { | |
2945 | struct ct_dpif_zone_limit *zone_limit; | |
2946 | ||
2947 | LIST_FOR_EACH (zone_limit, node, zone_limits) { | |
2948 | req_zone_limit.zone_id = zone_limit->zone; | |
2949 | req_zone_limit.limit = zone_limit->limit; | |
2950 | nl_msg_put(request, &req_zone_limit, sizeof req_zone_limit); | |
2951 | } | |
2952 | } | |
2953 | nl_msg_end_nested(request, opt_offset); | |
2954 | ||
2955 | int err = nl_transact(NETLINK_GENERIC, request, NULL); | |
2956 | ofpbuf_delete(request); | |
2957 | return err; | |
2958 | } | |
2959 | ||
2960 | static int | |
2961 | dpif_netlink_zone_limits_from_ofpbuf(const struct ofpbuf *buf, | |
2962 | uint32_t *default_limit, | |
2963 | struct ovs_list *zone_limits) | |
2964 | { | |
2965 | static const struct nl_policy ovs_ct_limit_policy[] = { | |
2966 | [OVS_CT_LIMIT_ATTR_ZONE_LIMIT] = { .type = NL_A_NESTED, | |
2967 | .optional = true }, | |
2968 | }; | |
2969 | ||
2970 | struct ofpbuf b = ofpbuf_const_initializer(buf->data, buf->size); | |
2971 | struct nlmsghdr *nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); | |
2972 | struct genlmsghdr *genl = ofpbuf_try_pull(&b, sizeof *genl); | |
2973 | struct ovs_header *ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); | |
2974 | ||
2975 | struct nlattr *attr[ARRAY_SIZE(ovs_ct_limit_policy)]; | |
2976 | ||
2977 | if (!nlmsg || !genl || !ovs_header | |
2978 | || nlmsg->nlmsg_type != ovs_ct_limit_family | |
2979 | || !nl_policy_parse(&b, 0, ovs_ct_limit_policy, attr, | |
2980 | ARRAY_SIZE(ovs_ct_limit_policy))) { | |
2981 | return EINVAL; | |
2982 | } | |
2983 | ||
2984 | ||
2985 | if (!attr[OVS_CT_LIMIT_ATTR_ZONE_LIMIT]) { | |
2986 | return EINVAL; | |
2987 | } | |
2988 | ||
2989 | int rem = NLA_ALIGN( | |
2990 | nl_attr_get_size(attr[OVS_CT_LIMIT_ATTR_ZONE_LIMIT])); | |
2991 | const struct ovs_zone_limit *zone_limit = | |
2992 | nl_attr_get(attr[OVS_CT_LIMIT_ATTR_ZONE_LIMIT]); | |
2993 | ||
2994 | while (rem >= sizeof *zone_limit) { | |
2995 | if (zone_limit->zone_id == OVS_ZONE_LIMIT_DEFAULT_ZONE) { | |
2996 | *default_limit = zone_limit->limit; | |
2997 | } else if (zone_limit->zone_id < OVS_ZONE_LIMIT_DEFAULT_ZONE || | |
2998 | zone_limit->zone_id > UINT16_MAX) { | |
2999 | } else { | |
3000 | ct_dpif_push_zone_limit(zone_limits, zone_limit->zone_id, | |
3001 | zone_limit->limit, zone_limit->count); | |
3002 | } | |
3003 | rem -= NLA_ALIGN(sizeof *zone_limit); | |
3004 | zone_limit = ALIGNED_CAST(struct ovs_zone_limit *, | |
3005 | (unsigned char *) zone_limit + NLA_ALIGN(sizeof *zone_limit)); | |
3006 | } | |
3007 | return 0; | |
3008 | } | |
3009 | ||
3010 | static int | |
3011 | dpif_netlink_ct_get_limits(struct dpif *dpif OVS_UNUSED, | |
3012 | uint32_t *default_limit, | |
3013 | const struct ovs_list *zone_limits_request, | |
3014 | struct ovs_list *zone_limits_reply) | |
3015 | { | |
3016 | if (ovs_ct_limit_family < 0) { | |
3017 | return EOPNOTSUPP; | |
3018 | } | |
3019 | ||
3020 | struct ofpbuf *request = ofpbuf_new(NL_DUMP_BUFSIZE); | |
3021 | nl_msg_put_genlmsghdr(request, 0, ovs_ct_limit_family, | |
3022 | NLM_F_REQUEST | NLM_F_ECHO, OVS_CT_LIMIT_CMD_GET, | |
3023 | OVS_CT_LIMIT_VERSION); | |
3024 | ||
3025 | struct ovs_header *ovs_header; | |
3026 | ovs_header = ofpbuf_put_uninit(request, sizeof *ovs_header); | |
3027 | ovs_header->dp_ifindex = 0; | |
3028 | ||
3029 | if (!ovs_list_is_empty(zone_limits_request)) { | |
3030 | size_t opt_offset = nl_msg_start_nested(request, | |
3031 | OVS_CT_LIMIT_ATTR_ZONE_LIMIT); | |
3032 | ||
3033 | struct ovs_zone_limit req_zone_limit; | |
3034 | req_zone_limit.zone_id = OVS_ZONE_LIMIT_DEFAULT_ZONE; | |
3035 | nl_msg_put(request, &req_zone_limit, sizeof req_zone_limit); | |
3036 | ||
3037 | struct ct_dpif_zone_limit *zone_limit; | |
3038 | LIST_FOR_EACH (zone_limit, node, zone_limits_request) { | |
3039 | req_zone_limit.zone_id = zone_limit->zone; | |
3040 | nl_msg_put(request, &req_zone_limit, sizeof req_zone_limit); | |
3041 | } | |
3042 | ||
3043 | nl_msg_end_nested(request, opt_offset); | |
3044 | } | |
3045 | ||
3046 | struct ofpbuf *reply; | |
3047 | int err = nl_transact(NETLINK_GENERIC, request, &reply); | |
3048 | if (err) { | |
3049 | goto out; | |
3050 | } | |
3051 | ||
3052 | err = dpif_netlink_zone_limits_from_ofpbuf(reply, default_limit, | |
3053 | zone_limits_reply); | |
3054 | ||
3055 | out: | |
3056 | ofpbuf_delete(request); | |
3057 | ofpbuf_delete(reply); | |
3058 | return err; | |
3059 | } | |
3060 | ||
3061 | static int | |
3062 | dpif_netlink_ct_del_limits(struct dpif *dpif OVS_UNUSED, | |
3063 | const struct ovs_list *zone_limits) | |
3064 | { | |
3065 | if (ovs_ct_limit_family < 0) { | |
3066 | return EOPNOTSUPP; | |
3067 | } | |
3068 | ||
3069 | struct ofpbuf *request = ofpbuf_new(NL_DUMP_BUFSIZE); | |
3070 | nl_msg_put_genlmsghdr(request, 0, ovs_ct_limit_family, | |
3071 | NLM_F_REQUEST | NLM_F_ECHO, OVS_CT_LIMIT_CMD_DEL, | |
3072 | OVS_CT_LIMIT_VERSION); | |
3073 | ||
3074 | struct ovs_header *ovs_header; | |
3075 | ovs_header = ofpbuf_put_uninit(request, sizeof *ovs_header); | |
3076 | ovs_header->dp_ifindex = 0; | |
3077 | ||
3078 | if (!ovs_list_is_empty(zone_limits)) { | |
3079 | size_t opt_offset = | |
3080 | nl_msg_start_nested(request, OVS_CT_LIMIT_ATTR_ZONE_LIMIT); | |
3081 | ||
3082 | struct ct_dpif_zone_limit *zone_limit; | |
3083 | LIST_FOR_EACH (zone_limit, node, zone_limits) { | |
3084 | struct ovs_zone_limit req_zone_limit; | |
3085 | req_zone_limit.zone_id = zone_limit->zone; | |
3086 | nl_msg_put(request, &req_zone_limit, sizeof req_zone_limit); | |
3087 | } | |
3088 | nl_msg_end_nested(request, opt_offset); | |
3089 | } | |
3090 | ||
3091 | int err = nl_transact(NETLINK_GENERIC, request, NULL); | |
3092 | ||
3093 | ofpbuf_delete(request); | |
3094 | return err; | |
3095 | } | |
3096 | ||
3097 | #define NL_TP_NAME_PREFIX "ovs_tp_" | |
3098 | ||
3099 | struct dpif_netlink_timeout_policy_protocol { | |
3100 | uint16_t l3num; | |
3101 | uint8_t l4num; | |
3102 | }; | |
3103 | ||
3104 | enum OVS_PACKED_ENUM dpif_netlink_support_timeout_policy_protocol { | |
3105 | DPIF_NL_TP_AF_INET_TCP, | |
3106 | DPIF_NL_TP_AF_INET_UDP, | |
3107 | DPIF_NL_TP_AF_INET_ICMP, | |
3108 | DPIF_NL_TP_AF_INET6_TCP, | |
3109 | DPIF_NL_TP_AF_INET6_UDP, | |
3110 | DPIF_NL_TP_AF_INET6_ICMPV6, | |
3111 | DPIF_NL_TP_MAX | |
3112 | }; | |
3113 | ||
3114 | #define DPIF_NL_ALL_TP ((1UL << DPIF_NL_TP_MAX) - 1) | |
3115 | ||
3116 | ||
3117 | static struct dpif_netlink_timeout_policy_protocol tp_protos[] = { | |
3118 | [DPIF_NL_TP_AF_INET_TCP] = { .l3num = AF_INET, .l4num = IPPROTO_TCP }, | |
3119 | [DPIF_NL_TP_AF_INET_UDP] = { .l3num = AF_INET, .l4num = IPPROTO_UDP }, | |
3120 | [DPIF_NL_TP_AF_INET_ICMP] = { .l3num = AF_INET, .l4num = IPPROTO_ICMP }, | |
3121 | [DPIF_NL_TP_AF_INET6_TCP] = { .l3num = AF_INET6, .l4num = IPPROTO_TCP }, | |
3122 | [DPIF_NL_TP_AF_INET6_UDP] = { .l3num = AF_INET6, .l4num = IPPROTO_UDP }, | |
3123 | [DPIF_NL_TP_AF_INET6_ICMPV6] = { .l3num = AF_INET6, | |
3124 | .l4num = IPPROTO_ICMPV6 }, | |
3125 | }; | |
3126 | ||
3127 | static void | |
3128 | dpif_netlink_format_tp_name(uint32_t id, uint16_t l3num, uint8_t l4num, | |
3129 | char **tp_name) | |
3130 | { | |
3131 | struct ds ds = DS_EMPTY_INITIALIZER; | |
3132 | ds_put_format(&ds, "%s%"PRIu32"_", NL_TP_NAME_PREFIX, id); | |
3133 | ct_dpif_format_ipproto(&ds, l4num); | |
3134 | ||
3135 | if (l3num == AF_INET) { | |
3136 | ds_put_cstr(&ds, "4"); | |
3137 | } else if (l3num == AF_INET6 && l4num != IPPROTO_ICMPV6) { | |
3138 | ds_put_cstr(&ds, "6"); | |
3139 | } | |
3140 | ||
3141 | ovs_assert(ds.length < CTNL_TIMEOUT_NAME_MAX); | |
3142 | ||
3143 | *tp_name = ds_steal_cstr(&ds); | |
3144 | } | |
3145 | ||
3146 | static int | |
3147 | dpif_netlink_ct_get_timeout_policy_name(struct dpif *dpif OVS_UNUSED, | |
3148 | uint32_t tp_id, uint16_t dl_type, | |
3149 | uint8_t nw_proto, char **tp_name, | |
3150 | bool *is_generic) | |
3151 | { | |
3152 | dpif_netlink_format_tp_name(tp_id, | |
3153 | dl_type == ETH_TYPE_IP ? AF_INET : AF_INET6, | |
3154 | nw_proto, tp_name); | |
3155 | *is_generic = false; | |
3156 | return 0; | |
3157 | } | |
3158 | ||
3159 | #define CT_DPIF_NL_TP_TCP_MAPPINGS \ | |
3160 | CT_DPIF_NL_TP_MAPPING(TCP, TCP, SYN_SENT, SYN_SENT) \ | |
3161 | CT_DPIF_NL_TP_MAPPING(TCP, TCP, SYN_RECV, SYN_RECV) \ | |
3162 | CT_DPIF_NL_TP_MAPPING(TCP, TCP, ESTABLISHED, ESTABLISHED) \ | |
3163 | CT_DPIF_NL_TP_MAPPING(TCP, TCP, FIN_WAIT, FIN_WAIT) \ | |
3164 | CT_DPIF_NL_TP_MAPPING(TCP, TCP, CLOSE_WAIT, CLOSE_WAIT) \ | |
3165 | CT_DPIF_NL_TP_MAPPING(TCP, TCP, LAST_ACK, LAST_ACK) \ | |
3166 | CT_DPIF_NL_TP_MAPPING(TCP, TCP, TIME_WAIT, TIME_WAIT) \ | |
3167 | CT_DPIF_NL_TP_MAPPING(TCP, TCP, CLOSE, CLOSE) \ | |
3168 | CT_DPIF_NL_TP_MAPPING(TCP, TCP, SYN_SENT2, SYN_SENT2) \ | |
3169 | CT_DPIF_NL_TP_MAPPING(TCP, TCP, RETRANSMIT, RETRANS) \ | |
3170 | CT_DPIF_NL_TP_MAPPING(TCP, TCP, UNACK, UNACK) | |
3171 | ||
3172 | #define CT_DPIF_NL_TP_UDP_MAPPINGS \ | |
3173 | CT_DPIF_NL_TP_MAPPING(UDP, UDP, SINGLE, UNREPLIED) \ | |
3174 | CT_DPIF_NL_TP_MAPPING(UDP, UDP, MULTIPLE, REPLIED) | |
3175 | ||
3176 | #define CT_DPIF_NL_TP_ICMP_MAPPINGS \ | |
3177 | CT_DPIF_NL_TP_MAPPING(ICMP, ICMP, FIRST, TIMEOUT) | |
3178 | ||
3179 | #define CT_DPIF_NL_TP_ICMPV6_MAPPINGS \ | |
3180 | CT_DPIF_NL_TP_MAPPING(ICMP, ICMPV6, FIRST, TIMEOUT) | |
3181 | ||
3182 | ||
3183 | #define CT_DPIF_NL_TP_MAPPING(PROTO1, PROTO2, ATTR1, ATTR2) \ | |
3184 | if (tp->present & (1 << CT_DPIF_TP_ATTR_##PROTO1##_##ATTR1)) { \ | |
3185 | nl_tp->present |= 1 << CTA_TIMEOUT_##PROTO2##_##ATTR2; \ | |
3186 | nl_tp->attrs[CTA_TIMEOUT_##PROTO2##_##ATTR2] = \ | |
3187 | tp->attrs[CT_DPIF_TP_ATTR_##PROTO1##_##ATTR1]; \ | |
3188 | } | |
3189 | ||
3190 | static void | |
3191 | dpif_netlink_get_nl_tp_tcp_attrs(const struct ct_dpif_timeout_policy *tp, | |
3192 | struct nl_ct_timeout_policy *nl_tp) | |
3193 | { | |
3194 | CT_DPIF_NL_TP_TCP_MAPPINGS | |
3195 | } | |
3196 | ||
3197 | static void | |
3198 | dpif_netlink_get_nl_tp_udp_attrs(const struct ct_dpif_timeout_policy *tp, | |
3199 | struct nl_ct_timeout_policy *nl_tp) | |
3200 | { | |
3201 | CT_DPIF_NL_TP_UDP_MAPPINGS | |
3202 | } | |
3203 | ||
3204 | static void | |
3205 | dpif_netlink_get_nl_tp_icmp_attrs(const struct ct_dpif_timeout_policy *tp, | |
3206 | struct nl_ct_timeout_policy *nl_tp) | |
3207 | { | |
3208 | CT_DPIF_NL_TP_ICMP_MAPPINGS | |
3209 | } | |
3210 | ||
3211 | static void | |
3212 | dpif_netlink_get_nl_tp_icmpv6_attrs(const struct ct_dpif_timeout_policy *tp, | |
3213 | struct nl_ct_timeout_policy *nl_tp) | |
3214 | { | |
3215 | CT_DPIF_NL_TP_ICMPV6_MAPPINGS | |
3216 | } | |
3217 | ||
3218 | #undef CT_DPIF_NL_TP_MAPPING | |
3219 | ||
3220 | static void | |
3221 | dpif_netlink_get_nl_tp_attrs(const struct ct_dpif_timeout_policy *tp, | |
3222 | uint8_t l4num, struct nl_ct_timeout_policy *nl_tp) | |
3223 | { | |
3224 | nl_tp->present = 0; | |
3225 | ||
3226 | if (l4num == IPPROTO_TCP) { | |
3227 | dpif_netlink_get_nl_tp_tcp_attrs(tp, nl_tp); | |
3228 | } else if (l4num == IPPROTO_UDP) { | |
3229 | dpif_netlink_get_nl_tp_udp_attrs(tp, nl_tp); | |
3230 | } else if (l4num == IPPROTO_ICMP) { | |
3231 | dpif_netlink_get_nl_tp_icmp_attrs(tp, nl_tp); | |
3232 | } else if (l4num == IPPROTO_ICMPV6) { | |
3233 | dpif_netlink_get_nl_tp_icmpv6_attrs(tp, nl_tp); | |
3234 | } | |
3235 | } | |
3236 | ||
3237 | #define CT_DPIF_NL_TP_MAPPING(PROTO1, PROTO2, ATTR1, ATTR2) \ | |
3238 | if (nl_tp->present & (1 << CTA_TIMEOUT_##PROTO2##_##ATTR2)) { \ | |
3239 | if (tp->present & (1 << CT_DPIF_TP_ATTR_##PROTO1##_##ATTR1)) { \ | |
3240 | if (tp->attrs[CT_DPIF_TP_ATTR_##PROTO1##_##ATTR1] != \ | |
3241 | nl_tp->attrs[CTA_TIMEOUT_##PROTO2##_##ATTR2]) { \ | |
3242 | VLOG_WARN_RL(&error_rl, "Inconsistent timeout policy %s " \ | |
3243 | "attribute %s=%"PRIu32" while %s=%"PRIu32, \ | |
3244 | nl_tp->name, "CTA_TIMEOUT_"#PROTO2"_"#ATTR2, \ | |
3245 | nl_tp->attrs[CTA_TIMEOUT_##PROTO2##_##ATTR2], \ | |
3246 | "CT_DPIF_TP_ATTR_"#PROTO1"_"#ATTR1, \ | |
3247 | tp->attrs[CT_DPIF_TP_ATTR_##PROTO1##_##ATTR1]); \ | |
3248 | } \ | |
3249 | } else { \ | |
3250 | tp->present |= 1 << CT_DPIF_TP_ATTR_##PROTO1##_##ATTR1; \ | |
3251 | tp->attrs[CT_DPIF_TP_ATTR_##PROTO1##_##ATTR1] = \ | |
3252 | nl_tp->attrs[CTA_TIMEOUT_##PROTO2##_##ATTR2]; \ | |
3253 | } \ | |
3254 | } | |
3255 | ||
3256 | static void | |
3257 | dpif_netlink_set_ct_dpif_tp_tcp_attrs(const struct nl_ct_timeout_policy *nl_tp, | |
3258 | struct ct_dpif_timeout_policy *tp) | |
3259 | { | |
3260 | CT_DPIF_NL_TP_TCP_MAPPINGS | |
3261 | } | |
3262 | ||
3263 | static void | |
3264 | dpif_netlink_set_ct_dpif_tp_udp_attrs(const struct nl_ct_timeout_policy *nl_tp, | |
3265 | struct ct_dpif_timeout_policy *tp) | |
3266 | { | |
3267 | CT_DPIF_NL_TP_UDP_MAPPINGS | |
3268 | } | |
3269 | ||
3270 | static void | |
3271 | dpif_netlink_set_ct_dpif_tp_icmp_attrs( | |
3272 | const struct nl_ct_timeout_policy *nl_tp, | |
3273 | struct ct_dpif_timeout_policy *tp) | |
3274 | { | |
3275 | CT_DPIF_NL_TP_ICMP_MAPPINGS | |
3276 | } | |
3277 | ||
3278 | static void | |
3279 | dpif_netlink_set_ct_dpif_tp_icmpv6_attrs( | |
3280 | const struct nl_ct_timeout_policy *nl_tp, | |
3281 | struct ct_dpif_timeout_policy *tp) | |
3282 | { | |
3283 | CT_DPIF_NL_TP_ICMPV6_MAPPINGS | |
3284 | } | |
3285 | ||
3286 | #undef CT_DPIF_NL_TP_MAPPING | |
3287 | ||
3288 | static void | |
3289 | dpif_netlink_set_ct_dpif_tp_attrs(const struct nl_ct_timeout_policy *nl_tp, | |
3290 | struct ct_dpif_timeout_policy *tp) | |
3291 | { | |
3292 | if (nl_tp->l4num == IPPROTO_TCP) { | |
3293 | dpif_netlink_set_ct_dpif_tp_tcp_attrs(nl_tp, tp); | |
3294 | } else if (nl_tp->l4num == IPPROTO_UDP) { | |
3295 | dpif_netlink_set_ct_dpif_tp_udp_attrs(nl_tp, tp); | |
3296 | } else if (nl_tp->l4num == IPPROTO_ICMP) { | |
3297 | dpif_netlink_set_ct_dpif_tp_icmp_attrs(nl_tp, tp); | |
3298 | } else if (nl_tp->l4num == IPPROTO_ICMPV6) { | |
3299 | dpif_netlink_set_ct_dpif_tp_icmpv6_attrs(nl_tp, tp); | |
3300 | } | |
3301 | } | |
3302 | ||
3303 | #ifdef _WIN32 | |
3304 | static int | |
3305 | dpif_netlink_ct_set_timeout_policy(struct dpif *dpif OVS_UNUSED, | |
3306 | const struct ct_dpif_timeout_policy *tp) | |
3307 | { | |
3308 | return EOPNOTSUPP; | |
3309 | } | |
3310 | ||
3311 | static int | |
3312 | dpif_netlink_ct_get_timeout_policy(struct dpif *dpif OVS_UNUSED, | |
3313 | uint32_t tp_id, | |
3314 | struct ct_dpif_timeout_policy *tp) | |
3315 | { | |
3316 | return EOPNOTSUPP; | |
3317 | } | |
3318 | ||
3319 | static int | |
3320 | dpif_netlink_ct_del_timeout_policy(struct dpif *dpif OVS_UNUSED, | |
3321 | uint32_t tp_id) | |
3322 | { | |
3323 | return EOPNOTSUPP; | |
3324 | } | |
3325 | ||
3326 | static int | |
3327 | dpif_netlink_ct_timeout_policy_dump_start(struct dpif *dpif OVS_UNUSED, | |
3328 | void **statep) | |
3329 | { | |
3330 | return EOPNOTSUPP; | |
3331 | } | |
3332 | ||
3333 | static int | |
3334 | dpif_netlink_ct_timeout_policy_dump_next(struct dpif *dpif OVS_UNUSED, | |
3335 | void *state, | |
3336 | struct ct_dpif_timeout_policy **tp) | |
3337 | { | |
3338 | return EOPNOTSUPP; | |
3339 | } | |
3340 | ||
3341 | static int | |
3342 | dpif_netlink_ct_timeout_policy_dump_done(struct dpif *dpif OVS_UNUSED, | |
3343 | void *state) | |
3344 | { | |
3345 | return EOPNOTSUPP; | |
3346 | } | |
3347 | #else | |
3348 | static int | |
3349 | dpif_netlink_ct_set_timeout_policy(struct dpif *dpif OVS_UNUSED, | |
3350 | const struct ct_dpif_timeout_policy *tp) | |
3351 | { | |
3352 | int err = 0; | |
3353 | ||
3354 | for (int i = 0; i < ARRAY_SIZE(tp_protos); ++i) { | |
3355 | struct nl_ct_timeout_policy nl_tp; | |
3356 | char *nl_tp_name; | |
3357 | ||
3358 | dpif_netlink_format_tp_name(tp->id, tp_protos[i].l3num, | |
3359 | tp_protos[i].l4num, &nl_tp_name); | |
3360 | ovs_strlcpy(nl_tp.name, nl_tp_name, sizeof nl_tp.name); | |
3361 | free(nl_tp_name); | |
3362 | ||
3363 | nl_tp.l3num = tp_protos[i].l3num; | |
3364 | nl_tp.l4num = tp_protos[i].l4num; | |
3365 | dpif_netlink_get_nl_tp_attrs(tp, tp_protos[i].l4num, &nl_tp); | |
3366 | err = nl_ct_set_timeout_policy(&nl_tp); | |
3367 | if (err) { | |
3368 | VLOG_WARN_RL(&error_rl, "failed to add timeout policy %s (%s)", | |
3369 | nl_tp.name, ovs_strerror(err)); | |
3370 | goto out; | |
3371 | } | |
3372 | } | |
3373 | ||
3374 | out: | |
3375 | return err; | |
3376 | } | |
3377 | ||
3378 | static int | |
3379 | dpif_netlink_ct_get_timeout_policy(struct dpif *dpif OVS_UNUSED, | |
3380 | uint32_t tp_id, | |
3381 | struct ct_dpif_timeout_policy *tp) | |
3382 | { | |
3383 | int err = 0; | |
3384 | ||
3385 | tp->id = tp_id; | |
3386 | tp->present = 0; | |
3387 | for (int i = 0; i < ARRAY_SIZE(tp_protos); ++i) { | |
3388 | struct nl_ct_timeout_policy nl_tp; | |
3389 | char *nl_tp_name; | |
3390 | ||
3391 | dpif_netlink_format_tp_name(tp_id, tp_protos[i].l3num, | |
3392 | tp_protos[i].l4num, &nl_tp_name); | |
3393 | err = nl_ct_get_timeout_policy(nl_tp_name, &nl_tp); | |
3394 | ||
3395 | if (err) { | |
3396 | VLOG_WARN_RL(&error_rl, "failed to get timeout policy %s (%s)", | |
3397 | nl_tp_name, ovs_strerror(err)); | |
3398 | free(nl_tp_name); | |
3399 | goto out; | |
3400 | } | |
3401 | free(nl_tp_name); | |
3402 | dpif_netlink_set_ct_dpif_tp_attrs(&nl_tp, tp); | |
3403 | } | |
3404 | ||
3405 | out: | |
3406 | return err; | |
3407 | } | |
3408 | ||
3409 | /* Returns 0 if all the sub timeout policies are deleted or not exist in the | |
3410 | * kernel. Returns 1 if any sub timeout policy deletion failed. */ | |
3411 | static int | |
3412 | dpif_netlink_ct_del_timeout_policy(struct dpif *dpif OVS_UNUSED, | |
3413 | uint32_t tp_id) | |
3414 | { | |
3415 | int ret = 0; | |
3416 | ||
3417 | for (int i = 0; i < ARRAY_SIZE(tp_protos); ++i) { | |
3418 | char *nl_tp_name; | |
3419 | dpif_netlink_format_tp_name(tp_id, tp_protos[i].l3num, | |
3420 | tp_protos[i].l4num, &nl_tp_name); | |
3421 | int err = nl_ct_del_timeout_policy(nl_tp_name); | |
3422 | if (err == ENOENT) { | |
3423 | err = 0; | |
3424 | } | |
3425 | if (err) { | |
3426 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(6, 6); | |
3427 | VLOG_INFO_RL(&rl, "failed to delete timeout policy %s (%s)", | |
3428 | nl_tp_name, ovs_strerror(err)); | |
3429 | ret = 1; | |
3430 | } | |
3431 | free(nl_tp_name); | |
3432 | } | |
3433 | ||
3434 | return ret; | |
3435 | } | |
3436 | ||
3437 | struct dpif_netlink_ct_timeout_policy_dump_state { | |
3438 | struct nl_ct_timeout_policy_dump_state *nl_dump_state; | |
3439 | struct hmap tp_dump_map; | |
3440 | }; | |
3441 | ||
3442 | struct dpif_netlink_tp_dump_node { | |
3443 | struct hmap_node hmap_node; /* node in tp_dump_map. */ | |
3444 | struct ct_dpif_timeout_policy *tp; | |
3445 | uint32_t l3_l4_present; | |
3446 | }; | |
3447 | ||
3448 | static struct dpif_netlink_tp_dump_node * | |
3449 | get_dpif_netlink_tp_dump_node_by_tp_id(uint32_t tp_id, | |
3450 | struct hmap *tp_dump_map) | |
3451 | { | |
3452 | struct dpif_netlink_tp_dump_node *tp_dump_node; | |
3453 | ||
3454 | HMAP_FOR_EACH_WITH_HASH (tp_dump_node, hmap_node, hash_int(tp_id, 0), | |
3455 | tp_dump_map) { | |
3456 | if (tp_dump_node->tp->id == tp_id) { | |
3457 | return tp_dump_node; | |
3458 | } | |
3459 | } | |
3460 | return NULL; | |
3461 | } | |
3462 | ||
3463 | static void | |
3464 | update_dpif_netlink_tp_dump_node( | |
3465 | const struct nl_ct_timeout_policy *nl_tp, | |
3466 | struct dpif_netlink_tp_dump_node *tp_dump_node) | |
3467 | { | |
3468 | dpif_netlink_set_ct_dpif_tp_attrs(nl_tp, tp_dump_node->tp); | |
3469 | for (int i = 0; i < DPIF_NL_TP_MAX; ++i) { | |
3470 | if (nl_tp->l3num == tp_protos[i].l3num && | |
3471 | nl_tp->l4num == tp_protos[i].l4num) { | |
3472 | tp_dump_node->l3_l4_present |= 1 << i; | |
3473 | break; | |
3474 | } | |
3475 | } | |
3476 | } | |
3477 | ||
3478 | static int | |
3479 | dpif_netlink_ct_timeout_policy_dump_start(struct dpif *dpif OVS_UNUSED, | |
3480 | void **statep) | |
3481 | { | |
3482 | struct dpif_netlink_ct_timeout_policy_dump_state *dump_state; | |
3483 | ||
3484 | *statep = dump_state = xzalloc(sizeof *dump_state); | |
3485 | int err = nl_ct_timeout_policy_dump_start(&dump_state->nl_dump_state); | |
3486 | if (err) { | |
3487 | free(dump_state); | |
3488 | return err; | |
3489 | } | |
3490 | hmap_init(&dump_state->tp_dump_map); | |
3491 | return 0; | |
3492 | } | |
3493 | ||
3494 | static void | |
3495 | get_and_cleanup_tp_dump_node(struct hmap *hmap, | |
3496 | struct dpif_netlink_tp_dump_node *tp_dump_node, | |
3497 | struct ct_dpif_timeout_policy *tp) | |
3498 | { | |
3499 | hmap_remove(hmap, &tp_dump_node->hmap_node); | |
3500 | *tp = *tp_dump_node->tp; | |
3501 | free(tp_dump_node->tp); | |
3502 | free(tp_dump_node); | |
3503 | } | |
3504 | ||
3505 | static int | |
3506 | dpif_netlink_ct_timeout_policy_dump_next(struct dpif *dpif OVS_UNUSED, | |
3507 | void *state, | |
3508 | struct ct_dpif_timeout_policy *tp) | |
3509 | { | |
3510 | struct dpif_netlink_ct_timeout_policy_dump_state *dump_state = state; | |
3511 | struct dpif_netlink_tp_dump_node *tp_dump_node; | |
3512 | int err; | |
3513 | ||
3514 | /* Dumps all the timeout policies in the kernel. */ | |
3515 | do { | |
3516 | struct nl_ct_timeout_policy nl_tp; | |
3517 | uint32_t tp_id; | |
3518 | ||
3519 | err = nl_ct_timeout_policy_dump_next(dump_state->nl_dump_state, | |
3520 | &nl_tp); | |
3521 | if (err) { | |
3522 | break; | |
3523 | } | |
3524 | ||
3525 | /* We only interest in OVS installed timeout policies. */ | |
3526 | if (!ovs_scan(nl_tp.name, NL_TP_NAME_PREFIX"%"PRIu32, &tp_id)) { | |
3527 | continue; | |
3528 | } | |
3529 | ||
3530 | tp_dump_node = get_dpif_netlink_tp_dump_node_by_tp_id( | |
3531 | tp_id, &dump_state->tp_dump_map); | |
3532 | if (!tp_dump_node) { | |
3533 | tp_dump_node = xzalloc(sizeof *tp_dump_node); | |
3534 | tp_dump_node->tp = xzalloc(sizeof *tp_dump_node->tp); | |
3535 | tp_dump_node->tp->id = tp_id; | |
3536 | hmap_insert(&dump_state->tp_dump_map, &tp_dump_node->hmap_node, | |
3537 | hash_int(tp_id, 0)); | |
3538 | } | |
3539 | ||
3540 | update_dpif_netlink_tp_dump_node(&nl_tp, tp_dump_node); | |
3541 | ||
3542 | /* Returns one ct_dpif_timeout_policy if we gather all the L3/L4 | |
3543 | * sub-pieces. */ | |
3544 | if (tp_dump_node->l3_l4_present == DPIF_NL_ALL_TP) { | |
3545 | get_and_cleanup_tp_dump_node(&dump_state->tp_dump_map, | |
3546 | tp_dump_node, tp); | |
3547 | break; | |
3548 | } | |
3549 | } while (true); | |
3550 | ||
3551 | /* Dump the incomplete timeout policies. */ | |
3552 | if (err == EOF) { | |
3553 | if (!hmap_is_empty(&dump_state->tp_dump_map)) { | |
3554 | struct hmap_node *hmap_node = hmap_first(&dump_state->tp_dump_map); | |
3555 | tp_dump_node = CONTAINER_OF(hmap_node, | |
3556 | struct dpif_netlink_tp_dump_node, | |
3557 | hmap_node); | |
3558 | get_and_cleanup_tp_dump_node(&dump_state->tp_dump_map, | |
3559 | tp_dump_node, tp); | |
3560 | return 0; | |
3561 | } | |
3562 | } | |
3563 | ||
3564 | return err; | |
3565 | } | |
3566 | ||
3567 | static int | |
3568 | dpif_netlink_ct_timeout_policy_dump_done(struct dpif *dpif OVS_UNUSED, | |
3569 | void *state) | |
3570 | { | |
3571 | struct dpif_netlink_ct_timeout_policy_dump_state *dump_state = state; | |
3572 | struct dpif_netlink_tp_dump_node *tp_dump_node; | |
3573 | ||
3574 | int err = nl_ct_timeout_policy_dump_done(dump_state->nl_dump_state); | |
3575 | HMAP_FOR_EACH_POP (tp_dump_node, hmap_node, &dump_state->tp_dump_map) { | |
3576 | free(tp_dump_node->tp); | |
3577 | free(tp_dump_node); | |
3578 | } | |
3579 | hmap_destroy(&dump_state->tp_dump_map); | |
3580 | free(dump_state); | |
3581 | return err; | |
3582 | } | |
3583 | #endif | |
3584 | ||
3585 | \f | |
3586 | /* Meters */ | |
3587 | ||
3588 | /* Set of supported meter flags */ | |
3589 | #define DP_SUPPORTED_METER_FLAGS_MASK \ | |
3590 | (OFPMF13_STATS | OFPMF13_PKTPS | OFPMF13_KBPS | OFPMF13_BURST) | |
3591 | ||
3592 | /* Meter support was introduced in Linux 4.15. In some versions of | |
3593 | * Linux 4.15, 4.16, and 4.17, there was a bug that never set the id | |
3594 | * when the meter was created, so all meters essentially had an id of | |
3595 | * zero. Check for that condition and disable meters on those kernels. */ | |
3596 | static bool probe_broken_meters(struct dpif *); | |
3597 | ||
3598 | static void | |
3599 | dpif_netlink_meter_init(struct dpif_netlink *dpif, struct ofpbuf *buf, | |
3600 | void *stub, size_t size, uint32_t command) | |
3601 | { | |
3602 | ofpbuf_use_stub(buf, stub, size); | |
3603 | ||
3604 | nl_msg_put_genlmsghdr(buf, 0, ovs_meter_family, NLM_F_REQUEST | NLM_F_ECHO, | |
3605 | command, OVS_METER_VERSION); | |
3606 | ||
3607 | struct ovs_header *ovs_header; | |
3608 | ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header); | |
3609 | ovs_header->dp_ifindex = dpif->dp_ifindex; | |
3610 | } | |
3611 | ||
3612 | /* Execute meter 'request' in the kernel datapath. If the command | |
3613 | * fails, returns a positive errno value. Otherwise, stores the reply | |
3614 | * in '*replyp', parses the policy according to 'reply_policy' into the | |
3615 | * array of Netlink attribute in 'a', and returns 0. On success, the | |
3616 | * caller is responsible for calling ofpbuf_delete() on '*replyp' | |
3617 | * ('replyp' will contain pointers into 'a'). */ | |
3618 | static int | |
3619 | dpif_netlink_meter_transact(struct ofpbuf *request, struct ofpbuf **replyp, | |
3620 | const struct nl_policy *reply_policy, | |
3621 | struct nlattr **a, size_t size_a) | |
3622 | { | |
3623 | int error = nl_transact(NETLINK_GENERIC, request, replyp); | |
3624 | ofpbuf_uninit(request); | |
3625 | ||
3626 | if (error) { | |
3627 | return error; | |
3628 | } | |
3629 | ||
3630 | struct nlmsghdr *nlmsg = ofpbuf_try_pull(*replyp, sizeof *nlmsg); | |
3631 | struct genlmsghdr *genl = ofpbuf_try_pull(*replyp, sizeof *genl); | |
3632 | struct ovs_header *ovs_header = ofpbuf_try_pull(*replyp, | |
3633 | sizeof *ovs_header); | |
3634 | if (!nlmsg || !genl || !ovs_header | |
3635 | || nlmsg->nlmsg_type != ovs_meter_family | |
3636 | || !nl_policy_parse(*replyp, 0, reply_policy, a, size_a)) { | |
3637 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
3638 | VLOG_DBG_RL(&rl, | |
3639 | "Kernel module response to meter tranaction is invalid"); | |
3640 | return EINVAL; | |
3641 | } | |
3642 | return 0; | |
3643 | } | |
3644 | ||
3645 | static void | |
3646 | dpif_netlink_meter_get_features(const struct dpif *dpif_, | |
3647 | struct ofputil_meter_features *features) | |
3648 | { | |
3649 | if (probe_broken_meters(CONST_CAST(struct dpif *, dpif_))) { | |
3650 | features = NULL; | |
3651 | return; | |
3652 | } | |
3653 | ||
3654 | struct ofpbuf buf, *msg; | |
3655 | uint64_t stub[1024 / 8]; | |
3656 | ||
3657 | static const struct nl_policy ovs_meter_features_policy[] = { | |
3658 | [OVS_METER_ATTR_MAX_METERS] = { .type = NL_A_U32 }, | |
3659 | [OVS_METER_ATTR_MAX_BANDS] = { .type = NL_A_U32 }, | |
3660 | [OVS_METER_ATTR_BANDS] = { .type = NL_A_NESTED, .optional = true }, | |
3661 | }; | |
3662 | struct nlattr *a[ARRAY_SIZE(ovs_meter_features_policy)]; | |
3663 | ||
3664 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
3665 | dpif_netlink_meter_init(dpif, &buf, stub, sizeof stub, | |
3666 | OVS_METER_CMD_FEATURES); | |
3667 | if (dpif_netlink_meter_transact(&buf, &msg, ovs_meter_features_policy, a, | |
3668 | ARRAY_SIZE(ovs_meter_features_policy))) { | |
3669 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
3670 | VLOG_INFO_RL(&rl, | |
3671 | "dpif_netlink_meter_transact OVS_METER_CMD_FEATURES failed"); | |
3672 | return; | |
3673 | } | |
3674 | ||
3675 | features->max_meters = nl_attr_get_u32(a[OVS_METER_ATTR_MAX_METERS]); | |
3676 | features->max_bands = nl_attr_get_u32(a[OVS_METER_ATTR_MAX_BANDS]); | |
3677 | ||
3678 | /* Bands is a nested attribute of zero or more nested | |
3679 | * band attributes. */ | |
3680 | if (a[OVS_METER_ATTR_BANDS]) { | |
3681 | const struct nlattr *nla; | |
3682 | size_t left; | |
3683 | ||
3684 | NL_NESTED_FOR_EACH (nla, left, a[OVS_METER_ATTR_BANDS]) { | |
3685 | const struct nlattr *band_nla; | |
3686 | size_t band_left; | |
3687 | ||
3688 | NL_NESTED_FOR_EACH (band_nla, band_left, nla) { | |
3689 | if (nl_attr_type(band_nla) == OVS_BAND_ATTR_TYPE) { | |
3690 | if (nl_attr_get_size(band_nla) == sizeof(uint32_t)) { | |
3691 | switch (nl_attr_get_u32(band_nla)) { | |
3692 | case OVS_METER_BAND_TYPE_DROP: | |
3693 | features->band_types |= 1 << OFPMBT13_DROP; | |
3694 | break; | |
3695 | } | |
3696 | } | |
3697 | } | |
3698 | } | |
3699 | } | |
3700 | } | |
3701 | features->capabilities = DP_SUPPORTED_METER_FLAGS_MASK; | |
3702 | ||
3703 | ofpbuf_delete(msg); | |
3704 | } | |
3705 | ||
3706 | static int | |
3707 | dpif_netlink_meter_set__(struct dpif *dpif_, ofproto_meter_id meter_id, | |
3708 | struct ofputil_meter_config *config) | |
3709 | { | |
3710 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
3711 | struct ofpbuf buf, *msg; | |
3712 | uint64_t stub[1024 / 8]; | |
3713 | ||
3714 | static const struct nl_policy ovs_meter_set_response_policy[] = { | |
3715 | [OVS_METER_ATTR_ID] = { .type = NL_A_U32 }, | |
3716 | }; | |
3717 | struct nlattr *a[ARRAY_SIZE(ovs_meter_set_response_policy)]; | |
3718 | ||
3719 | if (config->flags & ~DP_SUPPORTED_METER_FLAGS_MASK) { | |
3720 | return EBADF; /* Unsupported flags set */ | |
3721 | } | |
3722 | ||
3723 | for (size_t i = 0; i < config->n_bands; i++) { | |
3724 | switch (config->bands[i].type) { | |
3725 | case OFPMBT13_DROP: | |
3726 | break; | |
3727 | default: | |
3728 | return ENODEV; /* Unsupported band type */ | |
3729 | } | |
3730 | } | |
3731 | ||
3732 | dpif_netlink_meter_init(dpif, &buf, stub, sizeof stub, OVS_METER_CMD_SET); | |
3733 | ||
3734 | nl_msg_put_u32(&buf, OVS_METER_ATTR_ID, meter_id.uint32); | |
3735 | ||
3736 | if (config->flags & OFPMF13_KBPS) { | |
3737 | nl_msg_put_flag(&buf, OVS_METER_ATTR_KBPS); | |
3738 | } | |
3739 | ||
3740 | size_t bands_offset = nl_msg_start_nested(&buf, OVS_METER_ATTR_BANDS); | |
3741 | /* Bands */ | |
3742 | for (size_t i = 0; i < config->n_bands; ++i) { | |
3743 | struct ofputil_meter_band * band = &config->bands[i]; | |
3744 | uint32_t band_type; | |
3745 | ||
3746 | size_t band_offset = nl_msg_start_nested(&buf, OVS_BAND_ATTR_UNSPEC); | |
3747 | ||
3748 | switch (band->type) { | |
3749 | case OFPMBT13_DROP: | |
3750 | band_type = OVS_METER_BAND_TYPE_DROP; | |
3751 | break; | |
3752 | default: | |
3753 | band_type = OVS_METER_BAND_TYPE_UNSPEC; | |
3754 | } | |
3755 | nl_msg_put_u32(&buf, OVS_BAND_ATTR_TYPE, band_type); | |
3756 | nl_msg_put_u32(&buf, OVS_BAND_ATTR_RATE, band->rate); | |
3757 | nl_msg_put_u32(&buf, OVS_BAND_ATTR_BURST, | |
3758 | config->flags & OFPMF13_BURST ? | |
3759 | band->burst_size : band->rate); | |
3760 | nl_msg_end_nested(&buf, band_offset); | |
3761 | } | |
3762 | nl_msg_end_nested(&buf, bands_offset); | |
3763 | ||
3764 | int error = dpif_netlink_meter_transact(&buf, &msg, | |
3765 | ovs_meter_set_response_policy, a, | |
3766 | ARRAY_SIZE(ovs_meter_set_response_policy)); | |
3767 | if (error) { | |
3768 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
3769 | VLOG_INFO_RL(&rl, | |
3770 | "dpif_netlink_meter_transact OVS_METER_CMD_SET failed"); | |
3771 | return error; | |
3772 | } | |
3773 | ||
3774 | if (nl_attr_get_u32(a[OVS_METER_ATTR_ID]) != meter_id.uint32) { | |
3775 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
3776 | VLOG_INFO_RL(&rl, | |
3777 | "Kernel returned a different meter id than requested"); | |
3778 | } | |
3779 | ofpbuf_delete(msg); | |
3780 | return 0; | |
3781 | } | |
3782 | ||
3783 | static int | |
3784 | dpif_netlink_meter_set(struct dpif *dpif_, ofproto_meter_id meter_id, | |
3785 | struct ofputil_meter_config *config) | |
3786 | { | |
3787 | if (probe_broken_meters(dpif_)) { | |
3788 | return ENOMEM; | |
3789 | } | |
3790 | ||
3791 | return dpif_netlink_meter_set__(dpif_, meter_id, config); | |
3792 | } | |
3793 | ||
3794 | /* Retrieve statistics and/or delete meter 'meter_id'. Statistics are | |
3795 | * stored in 'stats', if it is not null. If 'command' is | |
3796 | * OVS_METER_CMD_DEL, the meter is deleted and statistics are optionally | |
3797 | * retrieved. If 'command' is OVS_METER_CMD_GET, then statistics are | |
3798 | * simply retrieved. */ | |
3799 | static int | |
3800 | dpif_netlink_meter_get_stats(const struct dpif *dpif_, | |
3801 | ofproto_meter_id meter_id, | |
3802 | struct ofputil_meter_stats *stats, | |
3803 | uint16_t max_bands, | |
3804 | enum ovs_meter_cmd command) | |
3805 | { | |
3806 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
3807 | struct ofpbuf buf, *msg; | |
3808 | uint64_t stub[1024 / 8]; | |
3809 | ||
3810 | static const struct nl_policy ovs_meter_stats_policy[] = { | |
3811 | [OVS_METER_ATTR_ID] = { .type = NL_A_U32, .optional = true}, | |
3812 | [OVS_METER_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_flow_stats), | |
3813 | .optional = true}, | |
3814 | [OVS_METER_ATTR_BANDS] = { .type = NL_A_NESTED, .optional = true }, | |
3815 | }; | |
3816 | struct nlattr *a[ARRAY_SIZE(ovs_meter_stats_policy)]; | |
3817 | ||
3818 | dpif_netlink_meter_init(dpif, &buf, stub, sizeof stub, command); | |
3819 | ||
3820 | nl_msg_put_u32(&buf, OVS_METER_ATTR_ID, meter_id.uint32); | |
3821 | ||
3822 | int error = dpif_netlink_meter_transact(&buf, &msg, | |
3823 | ovs_meter_stats_policy, a, | |
3824 | ARRAY_SIZE(ovs_meter_stats_policy)); | |
3825 | if (error) { | |
3826 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 5); | |
3827 | VLOG_INFO_RL(&rl, "dpif_netlink_meter_transact %s failed", | |
3828 | command == OVS_METER_CMD_GET ? "get" : "del"); | |
3829 | return error; | |
3830 | } | |
3831 | ||
3832 | if (stats | |
3833 | && a[OVS_METER_ATTR_ID] | |
3834 | && a[OVS_METER_ATTR_STATS] | |
3835 | && nl_attr_get_u32(a[OVS_METER_ATTR_ID]) == meter_id.uint32) { | |
3836 | /* return stats */ | |
3837 | const struct ovs_flow_stats *stat; | |
3838 | const struct nlattr *nla; | |
3839 | size_t left; | |
3840 | ||
3841 | stat = nl_attr_get(a[OVS_METER_ATTR_STATS]); | |
3842 | stats->packet_in_count = get_32aligned_u64(&stat->n_packets); | |
3843 | stats->byte_in_count = get_32aligned_u64(&stat->n_bytes); | |
3844 | ||
3845 | if (a[OVS_METER_ATTR_BANDS]) { | |
3846 | size_t n_bands = 0; | |
3847 | NL_NESTED_FOR_EACH (nla, left, a[OVS_METER_ATTR_BANDS]) { | |
3848 | const struct nlattr *band_nla; | |
3849 | band_nla = nl_attr_find_nested(nla, OVS_BAND_ATTR_STATS); | |
3850 | if (band_nla && nl_attr_get_size(band_nla) \ | |
3851 | == sizeof(struct ovs_flow_stats)) { | |
3852 | stat = nl_attr_get(band_nla); | |
3853 | ||
3854 | if (n_bands < max_bands) { | |
3855 | stats->bands[n_bands].packet_count | |
3856 | = get_32aligned_u64(&stat->n_packets); | |
3857 | stats->bands[n_bands].byte_count | |
3858 | = get_32aligned_u64(&stat->n_bytes); | |
3859 | ++n_bands; | |
3860 | } | |
3861 | } else { | |
3862 | stats->bands[n_bands].packet_count = 0; | |
3863 | stats->bands[n_bands].byte_count = 0; | |
3864 | ++n_bands; | |
3865 | } | |
3866 | } | |
3867 | stats->n_bands = n_bands; | |
3868 | } else { | |
3869 | /* For a non-existent meter, return 0 stats. */ | |
3870 | stats->n_bands = 0; | |
3871 | } | |
3872 | } | |
3873 | ||
3874 | ofpbuf_delete(msg); | |
3875 | return error; | |
3876 | } | |
3877 | ||
3878 | static int | |
3879 | dpif_netlink_meter_get(const struct dpif *dpif, ofproto_meter_id meter_id, | |
3880 | struct ofputil_meter_stats *stats, uint16_t max_bands) | |
3881 | { | |
3882 | return dpif_netlink_meter_get_stats(dpif, meter_id, stats, max_bands, | |
3883 | OVS_METER_CMD_GET); | |
3884 | } | |
3885 | ||
3886 | static int | |
3887 | dpif_netlink_meter_del(struct dpif *dpif, ofproto_meter_id meter_id, | |
3888 | struct ofputil_meter_stats *stats, uint16_t max_bands) | |
3889 | { | |
3890 | return dpif_netlink_meter_get_stats(dpif, meter_id, stats, max_bands, | |
3891 | OVS_METER_CMD_DEL); | |
3892 | } | |
3893 | ||
3894 | static bool | |
3895 | probe_broken_meters__(struct dpif *dpif) | |
3896 | { | |
3897 | /* This test is destructive if a probe occurs while ovs-vswitchd is | |
3898 | * running (e.g., an ovs-dpctl meter command is called), so choose a | |
3899 | * random high meter id to make this less likely to occur. */ | |
3900 | ofproto_meter_id id1 = { 54545401 }; | |
3901 | ofproto_meter_id id2 = { 54545402 }; | |
3902 | struct ofputil_meter_band band = {OFPMBT13_DROP, 0, 1, 0}; | |
3903 | struct ofputil_meter_config config1 = { 1, OFPMF13_KBPS, 1, &band}; | |
3904 | struct ofputil_meter_config config2 = { 2, OFPMF13_KBPS, 1, &band}; | |
3905 | ||
3906 | /* Try adding two meters and make sure that they both come back with | |
3907 | * the proper meter id. Use the "__" version so that we don't cause | |
3908 | * a recurve deadlock. */ | |
3909 | dpif_netlink_meter_set__(dpif, id1, &config1); | |
3910 | dpif_netlink_meter_set__(dpif, id2, &config2); | |
3911 | ||
3912 | if (dpif_netlink_meter_get(dpif, id1, NULL, 0) | |
3913 | || dpif_netlink_meter_get(dpif, id2, NULL, 0)) { | |
3914 | VLOG_INFO("The kernel module has a broken meter implementation."); | |
3915 | return true; | |
3916 | } | |
3917 | ||
3918 | dpif_netlink_meter_del(dpif, id1, NULL, 0); | |
3919 | dpif_netlink_meter_del(dpif, id2, NULL, 0); | |
3920 | ||
3921 | return false; | |
3922 | } | |
3923 | ||
3924 | static bool | |
3925 | probe_broken_meters(struct dpif *dpif) | |
3926 | { | |
3927 | /* This is a once-only test because currently OVS only has at most a single | |
3928 | * Netlink capable datapath on any given platform. */ | |
3929 | static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; | |
3930 | ||
3931 | static bool broken_meters = false; | |
3932 | if (ovsthread_once_start(&once)) { | |
3933 | broken_meters = probe_broken_meters__(dpif); | |
3934 | ovsthread_once_done(&once); | |
3935 | } | |
3936 | return broken_meters; | |
3937 | } | |
3938 | \f | |
3939 | const struct dpif_class dpif_netlink_class = { | |
3940 | "system", | |
3941 | false, /* cleanup_required */ | |
3942 | NULL, /* init */ | |
3943 | dpif_netlink_enumerate, | |
3944 | NULL, | |
3945 | dpif_netlink_open, | |
3946 | dpif_netlink_close, | |
3947 | dpif_netlink_destroy, | |
3948 | dpif_netlink_run, | |
3949 | NULL, /* wait */ | |
3950 | dpif_netlink_get_stats, | |
3951 | dpif_netlink_set_features, | |
3952 | dpif_netlink_port_add, | |
3953 | dpif_netlink_port_del, | |
3954 | NULL, /* port_set_config */ | |
3955 | dpif_netlink_port_query_by_number, | |
3956 | dpif_netlink_port_query_by_name, | |
3957 | dpif_netlink_port_get_pid, | |
3958 | dpif_netlink_port_dump_start, | |
3959 | dpif_netlink_port_dump_next, | |
3960 | dpif_netlink_port_dump_done, | |
3961 | dpif_netlink_port_poll, | |
3962 | dpif_netlink_port_poll_wait, | |
3963 | dpif_netlink_flow_flush, | |
3964 | dpif_netlink_flow_dump_create, | |
3965 | dpif_netlink_flow_dump_destroy, | |
3966 | dpif_netlink_flow_dump_thread_create, | |
3967 | dpif_netlink_flow_dump_thread_destroy, | |
3968 | dpif_netlink_flow_dump_next, | |
3969 | dpif_netlink_operate, | |
3970 | dpif_netlink_recv_set, | |
3971 | dpif_netlink_handlers_set, | |
3972 | NULL, /* set_config */ | |
3973 | dpif_netlink_queue_to_priority, | |
3974 | dpif_netlink_recv, | |
3975 | dpif_netlink_recv_wait, | |
3976 | dpif_netlink_recv_purge, | |
3977 | NULL, /* register_dp_purge_cb */ | |
3978 | NULL, /* register_upcall_cb */ | |
3979 | NULL, /* enable_upcall */ | |
3980 | NULL, /* disable_upcall */ | |
3981 | dpif_netlink_get_datapath_version, /* get_datapath_version */ | |
3982 | dpif_netlink_ct_dump_start, | |
3983 | dpif_netlink_ct_dump_next, | |
3984 | dpif_netlink_ct_dump_done, | |
3985 | dpif_netlink_ct_flush, | |
3986 | NULL, /* ct_set_maxconns */ | |
3987 | NULL, /* ct_get_maxconns */ | |
3988 | NULL, /* ct_get_nconns */ | |
3989 | NULL, /* ct_set_tcp_seq_chk */ | |
3990 | NULL, /* ct_get_tcp_seq_chk */ | |
3991 | dpif_netlink_ct_set_limits, | |
3992 | dpif_netlink_ct_get_limits, | |
3993 | dpif_netlink_ct_del_limits, | |
3994 | dpif_netlink_ct_set_timeout_policy, | |
3995 | dpif_netlink_ct_get_timeout_policy, | |
3996 | dpif_netlink_ct_del_timeout_policy, | |
3997 | dpif_netlink_ct_timeout_policy_dump_start, | |
3998 | dpif_netlink_ct_timeout_policy_dump_next, | |
3999 | dpif_netlink_ct_timeout_policy_dump_done, | |
4000 | dpif_netlink_ct_get_timeout_policy_name, | |
4001 | NULL, /* ipf_set_enabled */ | |
4002 | NULL, /* ipf_set_min_frag */ | |
4003 | NULL, /* ipf_set_max_nfrags */ | |
4004 | NULL, /* ipf_get_status */ | |
4005 | NULL, /* ipf_dump_start */ | |
4006 | NULL, /* ipf_dump_next */ | |
4007 | NULL, /* ipf_dump_done */ | |
4008 | dpif_netlink_meter_get_features, | |
4009 | dpif_netlink_meter_set, | |
4010 | dpif_netlink_meter_get, | |
4011 | dpif_netlink_meter_del, | |
4012 | NULL, /* bond_add */ | |
4013 | NULL, /* bond_del */ | |
4014 | NULL, /* bond_stats_get */ | |
4015 | }; | |
4016 | ||
4017 | static int | |
4018 | dpif_netlink_init(void) | |
4019 | { | |
4020 | static struct ovsthread_once once = OVSTHREAD_ONCE_INITIALIZER; | |
4021 | static int error; | |
4022 | ||
4023 | if (ovsthread_once_start(&once)) { | |
4024 | error = nl_lookup_genl_family(OVS_DATAPATH_FAMILY, | |
4025 | &ovs_datapath_family); | |
4026 | if (error) { | |
4027 | VLOG_INFO("Generic Netlink family '%s' does not exist. " | |
4028 | "The Open vSwitch kernel module is probably not loaded.", | |
4029 | OVS_DATAPATH_FAMILY); | |
4030 | } | |
4031 | if (!error) { | |
4032 | error = nl_lookup_genl_family(OVS_VPORT_FAMILY, &ovs_vport_family); | |
4033 | } | |
4034 | if (!error) { | |
4035 | error = nl_lookup_genl_family(OVS_FLOW_FAMILY, &ovs_flow_family); | |
4036 | } | |
4037 | if (!error) { | |
4038 | error = nl_lookup_genl_family(OVS_PACKET_FAMILY, | |
4039 | &ovs_packet_family); | |
4040 | } | |
4041 | if (!error) { | |
4042 | error = nl_lookup_genl_mcgroup(OVS_VPORT_FAMILY, OVS_VPORT_MCGROUP, | |
4043 | &ovs_vport_mcgroup); | |
4044 | } | |
4045 | if (!error) { | |
4046 | if (nl_lookup_genl_family(OVS_METER_FAMILY, &ovs_meter_family)) { | |
4047 | VLOG_INFO("The kernel module does not support meters."); | |
4048 | } | |
4049 | } | |
4050 | if (nl_lookup_genl_family(OVS_CT_LIMIT_FAMILY, | |
4051 | &ovs_ct_limit_family) < 0) { | |
4052 | VLOG_INFO("Generic Netlink family '%s' does not exist. " | |
4053 | "Please update the Open vSwitch kernel module to enable " | |
4054 | "the conntrack limit feature.", OVS_CT_LIMIT_FAMILY); | |
4055 | } | |
4056 | ||
4057 | ovs_tunnels_out_of_tree = dpif_netlink_rtnl_probe_oot_tunnels(); | |
4058 | ||
4059 | ovsthread_once_done(&once); | |
4060 | } | |
4061 | ||
4062 | return error; | |
4063 | } | |
4064 | ||
4065 | bool | |
4066 | dpif_netlink_is_internal_device(const char *name) | |
4067 | { | |
4068 | struct dpif_netlink_vport reply; | |
4069 | struct ofpbuf *buf; | |
4070 | int error; | |
4071 | ||
4072 | error = dpif_netlink_vport_get(name, &reply, &buf); | |
4073 | if (!error) { | |
4074 | ofpbuf_delete(buf); | |
4075 | } else if (error != ENODEV && error != ENOENT) { | |
4076 | VLOG_WARN_RL(&error_rl, "%s: vport query failed (%s)", | |
4077 | name, ovs_strerror(error)); | |
4078 | } | |
4079 | ||
4080 | return reply.type == OVS_VPORT_TYPE_INTERNAL; | |
4081 | } | |
4082 | ||
4083 | /* Parses the contents of 'buf', which contains a "struct ovs_header" followed | |
4084 | * by Netlink attributes, into 'vport'. Returns 0 if successful, otherwise a | |
4085 | * positive errno value. | |
4086 | * | |
4087 | * 'vport' will contain pointers into 'buf', so the caller should not free | |
4088 | * 'buf' while 'vport' is still in use. */ | |
4089 | static int | |
4090 | dpif_netlink_vport_from_ofpbuf(struct dpif_netlink_vport *vport, | |
4091 | const struct ofpbuf *buf) | |
4092 | { | |
4093 | static const struct nl_policy ovs_vport_policy[] = { | |
4094 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NL_A_U32 }, | |
4095 | [OVS_VPORT_ATTR_TYPE] = { .type = NL_A_U32 }, | |
4096 | [OVS_VPORT_ATTR_NAME] = { .type = NL_A_STRING, .max_len = IFNAMSIZ }, | |
4097 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NL_A_UNSPEC }, | |
4098 | [OVS_VPORT_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_vport_stats), | |
4099 | .optional = true }, | |
4100 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NL_A_NESTED, .optional = true }, | |
4101 | [OVS_VPORT_ATTR_NETNSID] = { .type = NL_A_U32, .optional = true }, | |
4102 | }; | |
4103 | ||
4104 | dpif_netlink_vport_init(vport); | |
4105 | ||
4106 | struct ofpbuf b = ofpbuf_const_initializer(buf->data, buf->size); | |
4107 | struct nlmsghdr *nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); | |
4108 | struct genlmsghdr *genl = ofpbuf_try_pull(&b, sizeof *genl); | |
4109 | struct ovs_header *ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); | |
4110 | ||
4111 | struct nlattr *a[ARRAY_SIZE(ovs_vport_policy)]; | |
4112 | if (!nlmsg || !genl || !ovs_header | |
4113 | || nlmsg->nlmsg_type != ovs_vport_family | |
4114 | || !nl_policy_parse(&b, 0, ovs_vport_policy, a, | |
4115 | ARRAY_SIZE(ovs_vport_policy))) { | |
4116 | return EINVAL; | |
4117 | } | |
4118 | ||
4119 | vport->cmd = genl->cmd; | |
4120 | vport->dp_ifindex = ovs_header->dp_ifindex; | |
4121 | vport->port_no = nl_attr_get_odp_port(a[OVS_VPORT_ATTR_PORT_NO]); | |
4122 | vport->type = nl_attr_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
4123 | vport->name = nl_attr_get_string(a[OVS_VPORT_ATTR_NAME]); | |
4124 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { | |
4125 | vport->n_upcall_pids = nl_attr_get_size(a[OVS_VPORT_ATTR_UPCALL_PID]) | |
4126 | / (sizeof *vport->upcall_pids); | |
4127 | vport->upcall_pids = nl_attr_get(a[OVS_VPORT_ATTR_UPCALL_PID]); | |
4128 | ||
4129 | } | |
4130 | if (a[OVS_VPORT_ATTR_STATS]) { | |
4131 | vport->stats = nl_attr_get(a[OVS_VPORT_ATTR_STATS]); | |
4132 | } | |
4133 | if (a[OVS_VPORT_ATTR_OPTIONS]) { | |
4134 | vport->options = nl_attr_get(a[OVS_VPORT_ATTR_OPTIONS]); | |
4135 | vport->options_len = nl_attr_get_size(a[OVS_VPORT_ATTR_OPTIONS]); | |
4136 | } | |
4137 | if (a[OVS_VPORT_ATTR_NETNSID]) { | |
4138 | netnsid_set(&vport->netnsid, | |
4139 | nl_attr_get_u32(a[OVS_VPORT_ATTR_NETNSID])); | |
4140 | } else { | |
4141 | netnsid_set_local(&vport->netnsid); | |
4142 | } | |
4143 | return 0; | |
4144 | } | |
4145 | ||
4146 | /* Appends to 'buf' (which must initially be empty) a "struct ovs_header" | |
4147 | * followed by Netlink attributes corresponding to 'vport'. */ | |
4148 | static void | |
4149 | dpif_netlink_vport_to_ofpbuf(const struct dpif_netlink_vport *vport, | |
4150 | struct ofpbuf *buf) | |
4151 | { | |
4152 | struct ovs_header *ovs_header; | |
4153 | ||
4154 | nl_msg_put_genlmsghdr(buf, 0, ovs_vport_family, NLM_F_REQUEST | NLM_F_ECHO, | |
4155 | vport->cmd, OVS_VPORT_VERSION); | |
4156 | ||
4157 | ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header); | |
4158 | ovs_header->dp_ifindex = vport->dp_ifindex; | |
4159 | ||
4160 | if (vport->port_no != ODPP_NONE) { | |
4161 | nl_msg_put_odp_port(buf, OVS_VPORT_ATTR_PORT_NO, vport->port_no); | |
4162 | } | |
4163 | ||
4164 | if (vport->type != OVS_VPORT_TYPE_UNSPEC) { | |
4165 | nl_msg_put_u32(buf, OVS_VPORT_ATTR_TYPE, vport->type); | |
4166 | } | |
4167 | ||
4168 | if (vport->name) { | |
4169 | nl_msg_put_string(buf, OVS_VPORT_ATTR_NAME, vport->name); | |
4170 | } | |
4171 | ||
4172 | if (vport->upcall_pids) { | |
4173 | nl_msg_put_unspec(buf, OVS_VPORT_ATTR_UPCALL_PID, | |
4174 | vport->upcall_pids, | |
4175 | vport->n_upcall_pids * sizeof *vport->upcall_pids); | |
4176 | } | |
4177 | ||
4178 | if (vport->stats) { | |
4179 | nl_msg_put_unspec(buf, OVS_VPORT_ATTR_STATS, | |
4180 | vport->stats, sizeof *vport->stats); | |
4181 | } | |
4182 | ||
4183 | if (vport->options) { | |
4184 | nl_msg_put_nested(buf, OVS_VPORT_ATTR_OPTIONS, | |
4185 | vport->options, vport->options_len); | |
4186 | } | |
4187 | } | |
4188 | ||
4189 | /* Clears 'vport' to "empty" values. */ | |
4190 | void | |
4191 | dpif_netlink_vport_init(struct dpif_netlink_vport *vport) | |
4192 | { | |
4193 | memset(vport, 0, sizeof *vport); | |
4194 | vport->port_no = ODPP_NONE; | |
4195 | } | |
4196 | ||
4197 | /* Executes 'request' in the kernel datapath. If the command fails, returns a | |
4198 | * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0 | |
4199 | * without doing anything else. If 'reply' and 'bufp' are nonnull, then the | |
4200 | * result of the command is expected to be an ovs_vport also, which is decoded | |
4201 | * and stored in '*reply' and '*bufp'. The caller must free '*bufp' when the | |
4202 | * reply is no longer needed ('reply' will contain pointers into '*bufp'). */ | |
4203 | int | |
4204 | dpif_netlink_vport_transact(const struct dpif_netlink_vport *request, | |
4205 | struct dpif_netlink_vport *reply, | |
4206 | struct ofpbuf **bufp) | |
4207 | { | |
4208 | struct ofpbuf *request_buf; | |
4209 | int error; | |
4210 | ||
4211 | ovs_assert((reply != NULL) == (bufp != NULL)); | |
4212 | ||
4213 | error = dpif_netlink_init(); | |
4214 | if (error) { | |
4215 | if (reply) { | |
4216 | *bufp = NULL; | |
4217 | dpif_netlink_vport_init(reply); | |
4218 | } | |
4219 | return error; | |
4220 | } | |
4221 | ||
4222 | request_buf = ofpbuf_new(1024); | |
4223 | dpif_netlink_vport_to_ofpbuf(request, request_buf); | |
4224 | error = nl_transact(NETLINK_GENERIC, request_buf, bufp); | |
4225 | ofpbuf_delete(request_buf); | |
4226 | ||
4227 | if (reply) { | |
4228 | if (!error) { | |
4229 | error = dpif_netlink_vport_from_ofpbuf(reply, *bufp); | |
4230 | } | |
4231 | if (error) { | |
4232 | dpif_netlink_vport_init(reply); | |
4233 | ofpbuf_delete(*bufp); | |
4234 | *bufp = NULL; | |
4235 | } | |
4236 | } | |
4237 | return error; | |
4238 | } | |
4239 | ||
4240 | /* Obtains information about the kernel vport named 'name' and stores it into | |
4241 | * '*reply' and '*bufp'. The caller must free '*bufp' when the reply is no | |
4242 | * longer needed ('reply' will contain pointers into '*bufp'). */ | |
4243 | int | |
4244 | dpif_netlink_vport_get(const char *name, struct dpif_netlink_vport *reply, | |
4245 | struct ofpbuf **bufp) | |
4246 | { | |
4247 | struct dpif_netlink_vport request; | |
4248 | ||
4249 | dpif_netlink_vport_init(&request); | |
4250 | request.cmd = OVS_VPORT_CMD_GET; | |
4251 | request.name = name; | |
4252 | ||
4253 | return dpif_netlink_vport_transact(&request, reply, bufp); | |
4254 | } | |
4255 | ||
4256 | /* Parses the contents of 'buf', which contains a "struct ovs_header" followed | |
4257 | * by Netlink attributes, into 'dp'. Returns 0 if successful, otherwise a | |
4258 | * positive errno value. | |
4259 | * | |
4260 | * 'dp' will contain pointers into 'buf', so the caller should not free 'buf' | |
4261 | * while 'dp' is still in use. */ | |
4262 | static int | |
4263 | dpif_netlink_dp_from_ofpbuf(struct dpif_netlink_dp *dp, const struct ofpbuf *buf) | |
4264 | { | |
4265 | static const struct nl_policy ovs_datapath_policy[] = { | |
4266 | [OVS_DP_ATTR_NAME] = { .type = NL_A_STRING, .max_len = IFNAMSIZ }, | |
4267 | [OVS_DP_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_dp_stats), | |
4268 | .optional = true }, | |
4269 | [OVS_DP_ATTR_MEGAFLOW_STATS] = { | |
4270 | NL_POLICY_FOR(struct ovs_dp_megaflow_stats), | |
4271 | .optional = true }, | |
4272 | [OVS_DP_ATTR_USER_FEATURES] = { | |
4273 | .type = NL_A_U32, | |
4274 | .optional = true }, | |
4275 | }; | |
4276 | ||
4277 | dpif_netlink_dp_init(dp); | |
4278 | ||
4279 | struct ofpbuf b = ofpbuf_const_initializer(buf->data, buf->size); | |
4280 | struct nlmsghdr *nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); | |
4281 | struct genlmsghdr *genl = ofpbuf_try_pull(&b, sizeof *genl); | |
4282 | struct ovs_header *ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); | |
4283 | ||
4284 | struct nlattr *a[ARRAY_SIZE(ovs_datapath_policy)]; | |
4285 | if (!nlmsg || !genl || !ovs_header | |
4286 | || nlmsg->nlmsg_type != ovs_datapath_family | |
4287 | || !nl_policy_parse(&b, 0, ovs_datapath_policy, a, | |
4288 | ARRAY_SIZE(ovs_datapath_policy))) { | |
4289 | return EINVAL; | |
4290 | } | |
4291 | ||
4292 | dp->cmd = genl->cmd; | |
4293 | dp->dp_ifindex = ovs_header->dp_ifindex; | |
4294 | dp->name = nl_attr_get_string(a[OVS_DP_ATTR_NAME]); | |
4295 | if (a[OVS_DP_ATTR_STATS]) { | |
4296 | dp->stats = nl_attr_get(a[OVS_DP_ATTR_STATS]); | |
4297 | } | |
4298 | ||
4299 | if (a[OVS_DP_ATTR_MEGAFLOW_STATS]) { | |
4300 | dp->megaflow_stats = nl_attr_get(a[OVS_DP_ATTR_MEGAFLOW_STATS]); | |
4301 | } | |
4302 | ||
4303 | if (a[OVS_DP_ATTR_USER_FEATURES]) { | |
4304 | dp->user_features = nl_attr_get_u32(a[OVS_DP_ATTR_USER_FEATURES]); | |
4305 | } | |
4306 | ||
4307 | return 0; | |
4308 | } | |
4309 | ||
4310 | /* Appends to 'buf' the Generic Netlink message described by 'dp'. */ | |
4311 | static void | |
4312 | dpif_netlink_dp_to_ofpbuf(const struct dpif_netlink_dp *dp, struct ofpbuf *buf) | |
4313 | { | |
4314 | struct ovs_header *ovs_header; | |
4315 | ||
4316 | nl_msg_put_genlmsghdr(buf, 0, ovs_datapath_family, | |
4317 | NLM_F_REQUEST | NLM_F_ECHO, dp->cmd, | |
4318 | OVS_DATAPATH_VERSION); | |
4319 | ||
4320 | ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header); | |
4321 | ovs_header->dp_ifindex = dp->dp_ifindex; | |
4322 | ||
4323 | if (dp->name) { | |
4324 | nl_msg_put_string(buf, OVS_DP_ATTR_NAME, dp->name); | |
4325 | } | |
4326 | ||
4327 | if (dp->upcall_pid) { | |
4328 | nl_msg_put_u32(buf, OVS_DP_ATTR_UPCALL_PID, *dp->upcall_pid); | |
4329 | } | |
4330 | ||
4331 | if (dp->user_features) { | |
4332 | nl_msg_put_u32(buf, OVS_DP_ATTR_USER_FEATURES, dp->user_features); | |
4333 | } | |
4334 | ||
4335 | /* Skip OVS_DP_ATTR_STATS since we never have a reason to serialize it. */ | |
4336 | } | |
4337 | ||
4338 | /* Clears 'dp' to "empty" values. */ | |
4339 | static void | |
4340 | dpif_netlink_dp_init(struct dpif_netlink_dp *dp) | |
4341 | { | |
4342 | memset(dp, 0, sizeof *dp); | |
4343 | } | |
4344 | ||
4345 | static void | |
4346 | dpif_netlink_dp_dump_start(struct nl_dump *dump) | |
4347 | { | |
4348 | struct dpif_netlink_dp request; | |
4349 | struct ofpbuf *buf; | |
4350 | ||
4351 | dpif_netlink_dp_init(&request); | |
4352 | request.cmd = OVS_DP_CMD_GET; | |
4353 | ||
4354 | buf = ofpbuf_new(1024); | |
4355 | dpif_netlink_dp_to_ofpbuf(&request, buf); | |
4356 | nl_dump_start(dump, NETLINK_GENERIC, buf); | |
4357 | ofpbuf_delete(buf); | |
4358 | } | |
4359 | ||
4360 | /* Executes 'request' in the kernel datapath. If the command fails, returns a | |
4361 | * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0 | |
4362 | * without doing anything else. If 'reply' and 'bufp' are nonnull, then the | |
4363 | * result of the command is expected to be of the same form, which is decoded | |
4364 | * and stored in '*reply' and '*bufp'. The caller must free '*bufp' when the | |
4365 | * reply is no longer needed ('reply' will contain pointers into '*bufp'). */ | |
4366 | static int | |
4367 | dpif_netlink_dp_transact(const struct dpif_netlink_dp *request, | |
4368 | struct dpif_netlink_dp *reply, struct ofpbuf **bufp) | |
4369 | { | |
4370 | struct ofpbuf *request_buf; | |
4371 | int error; | |
4372 | ||
4373 | ovs_assert((reply != NULL) == (bufp != NULL)); | |
4374 | ||
4375 | request_buf = ofpbuf_new(1024); | |
4376 | dpif_netlink_dp_to_ofpbuf(request, request_buf); | |
4377 | error = nl_transact(NETLINK_GENERIC, request_buf, bufp); | |
4378 | ofpbuf_delete(request_buf); | |
4379 | ||
4380 | if (reply) { | |
4381 | dpif_netlink_dp_init(reply); | |
4382 | if (!error) { | |
4383 | error = dpif_netlink_dp_from_ofpbuf(reply, *bufp); | |
4384 | } | |
4385 | if (error) { | |
4386 | ofpbuf_delete(*bufp); | |
4387 | *bufp = NULL; | |
4388 | } | |
4389 | } | |
4390 | return error; | |
4391 | } | |
4392 | ||
4393 | /* Obtains information about 'dpif_' and stores it into '*reply' and '*bufp'. | |
4394 | * The caller must free '*bufp' when the reply is no longer needed ('reply' | |
4395 | * will contain pointers into '*bufp'). */ | |
4396 | static int | |
4397 | dpif_netlink_dp_get(const struct dpif *dpif_, struct dpif_netlink_dp *reply, | |
4398 | struct ofpbuf **bufp) | |
4399 | { | |
4400 | struct dpif_netlink *dpif = dpif_netlink_cast(dpif_); | |
4401 | struct dpif_netlink_dp request; | |
4402 | ||
4403 | dpif_netlink_dp_init(&request); | |
4404 | request.cmd = OVS_DP_CMD_GET; | |
4405 | request.dp_ifindex = dpif->dp_ifindex; | |
4406 | ||
4407 | return dpif_netlink_dp_transact(&request, reply, bufp); | |
4408 | } | |
4409 | ||
4410 | /* Parses the contents of 'buf', which contains a "struct ovs_header" followed | |
4411 | * by Netlink attributes, into 'flow'. Returns 0 if successful, otherwise a | |
4412 | * positive errno value. | |
4413 | * | |
4414 | * 'flow' will contain pointers into 'buf', so the caller should not free 'buf' | |
4415 | * while 'flow' is still in use. */ | |
4416 | static int | |
4417 | dpif_netlink_flow_from_ofpbuf(struct dpif_netlink_flow *flow, | |
4418 | const struct ofpbuf *buf) | |
4419 | { | |
4420 | static const struct nl_policy ovs_flow_policy[__OVS_FLOW_ATTR_MAX] = { | |
4421 | [OVS_FLOW_ATTR_KEY] = { .type = NL_A_NESTED, .optional = true }, | |
4422 | [OVS_FLOW_ATTR_MASK] = { .type = NL_A_NESTED, .optional = true }, | |
4423 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NL_A_NESTED, .optional = true }, | |
4424 | [OVS_FLOW_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_flow_stats), | |
4425 | .optional = true }, | |
4426 | [OVS_FLOW_ATTR_TCP_FLAGS] = { .type = NL_A_U8, .optional = true }, | |
4427 | [OVS_FLOW_ATTR_USED] = { .type = NL_A_U64, .optional = true }, | |
4428 | [OVS_FLOW_ATTR_UFID] = { .type = NL_A_U128, .optional = true }, | |
4429 | /* The kernel never uses OVS_FLOW_ATTR_CLEAR. */ | |
4430 | /* The kernel never uses OVS_FLOW_ATTR_PROBE. */ | |
4431 | /* The kernel never uses OVS_FLOW_ATTR_UFID_FLAGS. */ | |
4432 | }; | |
4433 | ||
4434 | dpif_netlink_flow_init(flow); | |
4435 | ||
4436 | struct ofpbuf b = ofpbuf_const_initializer(buf->data, buf->size); | |
4437 | struct nlmsghdr *nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); | |
4438 | struct genlmsghdr *genl = ofpbuf_try_pull(&b, sizeof *genl); | |
4439 | struct ovs_header *ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); | |
4440 | ||
4441 | struct nlattr *a[ARRAY_SIZE(ovs_flow_policy)]; | |
4442 | if (!nlmsg || !genl || !ovs_header | |
4443 | || nlmsg->nlmsg_type != ovs_flow_family | |
4444 | || !nl_policy_parse(&b, 0, ovs_flow_policy, a, | |
4445 | ARRAY_SIZE(ovs_flow_policy))) { | |
4446 | return EINVAL; | |
4447 | } | |
4448 | if (!a[OVS_FLOW_ATTR_KEY] && !a[OVS_FLOW_ATTR_UFID]) { | |
4449 | return EINVAL; | |
4450 | } | |
4451 | ||
4452 | flow->nlmsg_flags = nlmsg->nlmsg_flags; | |
4453 | flow->dp_ifindex = ovs_header->dp_ifindex; | |
4454 | if (a[OVS_FLOW_ATTR_KEY]) { | |
4455 | flow->key = nl_attr_get(a[OVS_FLOW_ATTR_KEY]); | |
4456 | flow->key_len = nl_attr_get_size(a[OVS_FLOW_ATTR_KEY]); | |
4457 | } | |
4458 | ||
4459 | if (a[OVS_FLOW_ATTR_UFID]) { | |
4460 | flow->ufid = nl_attr_get_u128(a[OVS_FLOW_ATTR_UFID]); | |
4461 | flow->ufid_present = true; | |
4462 | } | |
4463 | if (a[OVS_FLOW_ATTR_MASK]) { | |
4464 | flow->mask = nl_attr_get(a[OVS_FLOW_ATTR_MASK]); | |
4465 | flow->mask_len = nl_attr_get_size(a[OVS_FLOW_ATTR_MASK]); | |
4466 | } | |
4467 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
4468 | flow->actions = nl_attr_get(a[OVS_FLOW_ATTR_ACTIONS]); | |
4469 | flow->actions_len = nl_attr_get_size(a[OVS_FLOW_ATTR_ACTIONS]); | |
4470 | } | |
4471 | if (a[OVS_FLOW_ATTR_STATS]) { | |
4472 | flow->stats = nl_attr_get(a[OVS_FLOW_ATTR_STATS]); | |
4473 | } | |
4474 | if (a[OVS_FLOW_ATTR_TCP_FLAGS]) { | |
4475 | flow->tcp_flags = nl_attr_get(a[OVS_FLOW_ATTR_TCP_FLAGS]); | |
4476 | } | |
4477 | if (a[OVS_FLOW_ATTR_USED]) { | |
4478 | flow->used = nl_attr_get(a[OVS_FLOW_ATTR_USED]); | |
4479 | } | |
4480 | return 0; | |
4481 | } | |
4482 | ||
4483 | ||
4484 | /* | |
4485 | * If PACKET_TYPE attribute is present in 'data', it filters PACKET_TYPE out. | |
4486 | * If the flow is not Ethernet, the OVS_KEY_ATTR_PACKET_TYPE is converted to | |
4487 | * OVS_KEY_ATTR_ETHERTYPE. Puts 'data' to 'buf'. | |
4488 | */ | |
4489 | static void | |
4490 | put_exclude_packet_type(struct ofpbuf *buf, uint16_t type, | |
4491 | const struct nlattr *data, uint16_t data_len) | |
4492 | { | |
4493 | const struct nlattr *packet_type; | |
4494 | ||
4495 | packet_type = nl_attr_find__(data, data_len, OVS_KEY_ATTR_PACKET_TYPE); | |
4496 | ||
4497 | if (packet_type) { | |
4498 | /* exclude PACKET_TYPE Netlink attribute. */ | |
4499 | ovs_assert(NLA_ALIGN(packet_type->nla_len) == NL_A_U32_SIZE); | |
4500 | size_t packet_type_len = NL_A_U32_SIZE; | |
4501 | size_t first_chunk_size = (uint8_t *)packet_type - (uint8_t *)data; | |
4502 | size_t second_chunk_size = data_len - first_chunk_size | |
4503 | - packet_type_len; | |
4504 | struct nlattr *next_attr = nl_attr_next(packet_type); | |
4505 | size_t ofs; | |
4506 | ||
4507 | ofs = nl_msg_start_nested(buf, type); | |
4508 | nl_msg_put(buf, data, first_chunk_size); | |
4509 | nl_msg_put(buf, next_attr, second_chunk_size); | |
4510 | if (!nl_attr_find__(data, data_len, OVS_KEY_ATTR_ETHERNET)) { | |
4511 | ovs_be16 pt = pt_ns_type_be(nl_attr_get_be32(packet_type)); | |
4512 | const struct nlattr *nla; | |
4513 | ||
4514 | nla = nl_attr_find(buf, ofs + NLA_HDRLEN, OVS_KEY_ATTR_ETHERTYPE); | |
4515 | if (nla) { | |
4516 | ovs_be16 *ethertype; | |
4517 | ||
4518 | ethertype = CONST_CAST(ovs_be16 *, nl_attr_get(nla)); | |
4519 | *ethertype = pt; | |
4520 | } else { | |
4521 | nl_msg_put_be16(buf, OVS_KEY_ATTR_ETHERTYPE, pt); | |
4522 | } | |
4523 | } | |
4524 | nl_msg_end_nested(buf, ofs); | |
4525 | } else { | |
4526 | nl_msg_put_unspec(buf, type, data, data_len); | |
4527 | } | |
4528 | } | |
4529 | ||
4530 | /* Appends to 'buf' (which must initially be empty) a "struct ovs_header" | |
4531 | * followed by Netlink attributes corresponding to 'flow'. */ | |
4532 | static void | |
4533 | dpif_netlink_flow_to_ofpbuf(const struct dpif_netlink_flow *flow, | |
4534 | struct ofpbuf *buf) | |
4535 | { | |
4536 | struct ovs_header *ovs_header; | |
4537 | ||
4538 | nl_msg_put_genlmsghdr(buf, 0, ovs_flow_family, | |
4539 | NLM_F_REQUEST | flow->nlmsg_flags, | |
4540 | flow->cmd, OVS_FLOW_VERSION); | |
4541 | ||
4542 | ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header); | |
4543 | ovs_header->dp_ifindex = flow->dp_ifindex; | |
4544 | ||
4545 | if (flow->ufid_present) { | |
4546 | nl_msg_put_u128(buf, OVS_FLOW_ATTR_UFID, flow->ufid); | |
4547 | } | |
4548 | if (flow->ufid_terse) { | |
4549 | nl_msg_put_u32(buf, OVS_FLOW_ATTR_UFID_FLAGS, | |
4550 | OVS_UFID_F_OMIT_KEY | OVS_UFID_F_OMIT_MASK | |
4551 | | OVS_UFID_F_OMIT_ACTIONS); | |
4552 | } | |
4553 | if (!flow->ufid_terse || !flow->ufid_present) { | |
4554 | if (flow->key_len) { | |
4555 | put_exclude_packet_type(buf, OVS_FLOW_ATTR_KEY, flow->key, | |
4556 | flow->key_len); | |
4557 | } | |
4558 | if (flow->mask_len) { | |
4559 | put_exclude_packet_type(buf, OVS_FLOW_ATTR_MASK, flow->mask, | |
4560 | flow->mask_len); | |
4561 | } | |
4562 | if (flow->actions || flow->actions_len) { | |
4563 | nl_msg_put_unspec(buf, OVS_FLOW_ATTR_ACTIONS, | |
4564 | flow->actions, flow->actions_len); | |
4565 | } | |
4566 | } | |
4567 | ||
4568 | /* We never need to send these to the kernel. */ | |
4569 | ovs_assert(!flow->stats); | |
4570 | ovs_assert(!flow->tcp_flags); | |
4571 | ovs_assert(!flow->used); | |
4572 | ||
4573 | if (flow->clear) { | |
4574 | nl_msg_put_flag(buf, OVS_FLOW_ATTR_CLEAR); | |
4575 | } | |
4576 | if (flow->probe) { | |
4577 | nl_msg_put_flag(buf, OVS_FLOW_ATTR_PROBE); | |
4578 | } | |
4579 | } | |
4580 | ||
4581 | /* Clears 'flow' to "empty" values. */ | |
4582 | static void | |
4583 | dpif_netlink_flow_init(struct dpif_netlink_flow *flow) | |
4584 | { | |
4585 | memset(flow, 0, sizeof *flow); | |
4586 | } | |
4587 | ||
4588 | /* Executes 'request' in the kernel datapath. If the command fails, returns a | |
4589 | * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0 | |
4590 | * without doing anything else. If 'reply' and 'bufp' are nonnull, then the | |
4591 | * result of the command is expected to be a flow also, which is decoded and | |
4592 | * stored in '*reply' and '*bufp'. The caller must free '*bufp' when the reply | |
4593 | * is no longer needed ('reply' will contain pointers into '*bufp'). */ | |
4594 | static int | |
4595 | dpif_netlink_flow_transact(struct dpif_netlink_flow *request, | |
4596 | struct dpif_netlink_flow *reply, | |
4597 | struct ofpbuf **bufp) | |
4598 | { | |
4599 | struct ofpbuf *request_buf; | |
4600 | int error; | |
4601 | ||
4602 | ovs_assert((reply != NULL) == (bufp != NULL)); | |
4603 | ||
4604 | if (reply) { | |
4605 | request->nlmsg_flags |= NLM_F_ECHO; | |
4606 | } | |
4607 | ||
4608 | request_buf = ofpbuf_new(1024); | |
4609 | dpif_netlink_flow_to_ofpbuf(request, request_buf); | |
4610 | error = nl_transact(NETLINK_GENERIC, request_buf, bufp); | |
4611 | ofpbuf_delete(request_buf); | |
4612 | ||
4613 | if (reply) { | |
4614 | if (!error) { | |
4615 | error = dpif_netlink_flow_from_ofpbuf(reply, *bufp); | |
4616 | } | |
4617 | if (error) { | |
4618 | dpif_netlink_flow_init(reply); | |
4619 | ofpbuf_delete(*bufp); | |
4620 | *bufp = NULL; | |
4621 | } | |
4622 | } | |
4623 | return error; | |
4624 | } | |
4625 | ||
4626 | static void | |
4627 | dpif_netlink_flow_get_stats(const struct dpif_netlink_flow *flow, | |
4628 | struct dpif_flow_stats *stats) | |
4629 | { | |
4630 | if (flow->stats) { | |
4631 | stats->n_packets = get_32aligned_u64(&flow->stats->n_packets); | |
4632 | stats->n_bytes = get_32aligned_u64(&flow->stats->n_bytes); | |
4633 | } else { | |
4634 | stats->n_packets = 0; | |
4635 | stats->n_bytes = 0; | |
4636 | } | |
4637 | stats->used = flow->used ? get_32aligned_u64(flow->used) : 0; | |
4638 | stats->tcp_flags = flow->tcp_flags ? *flow->tcp_flags : 0; | |
4639 | } | |
4640 | ||
4641 | /* Logs information about a packet that was recently lost in 'ch' (in | |
4642 | * 'dpif_'). */ | |
4643 | static void | |
4644 | report_loss(struct dpif_netlink *dpif, struct dpif_channel *ch, uint32_t ch_idx, | |
4645 | uint32_t handler_id) | |
4646 | { | |
4647 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 5); | |
4648 | struct ds s; | |
4649 | ||
4650 | if (VLOG_DROP_WARN(&rl)) { | |
4651 | return; | |
4652 | } | |
4653 | ||
4654 | ds_init(&s); | |
4655 | if (ch->last_poll != LLONG_MIN) { | |
4656 | ds_put_format(&s, " (last polled %lld ms ago)", | |
4657 | time_msec() - ch->last_poll); | |
4658 | } | |
4659 | ||
4660 | VLOG_WARN("%s: lost packet on port channel %u of handler %u", | |
4661 | dpif_name(&dpif->dpif), ch_idx, handler_id); | |
4662 | ds_destroy(&s); | |
4663 | } |