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96fba48f | 1 | /* |
e0edde6f | 2 | * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira, Inc. |
96fba48f BP |
3 | * |
4 | * Licensed under the Apache License, Version 2.0 (the "License"); | |
5 | * you may not use this file except in compliance with the License. | |
6 | * You may obtain a copy of the License at: | |
7 | * | |
8 | * http://www.apache.org/licenses/LICENSE-2.0 | |
9 | * | |
10 | * Unless required by applicable law or agreed to in writing, software | |
11 | * distributed under the License is distributed on an "AS IS" BASIS, | |
12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
13 | * See the License for the specific language governing permissions and | |
14 | * limitations under the License. | |
15 | */ | |
16 | ||
17 | #include <config.h> | |
9fe3b9a2 BP |
18 | |
19 | #include "dpif-linux.h" | |
96fba48f BP |
20 | |
21 | #include <assert.h> | |
22 | #include <ctype.h> | |
23 | #include <errno.h> | |
24 | #include <fcntl.h> | |
25 | #include <inttypes.h> | |
26 | #include <net/if.h> | |
b90fa799 | 27 | #include <linux/types.h> |
aae51f53 | 28 | #include <linux/pkt_sched.h> |
e9e28be3 | 29 | #include <linux/rtnetlink.h> |
96fba48f | 30 | #include <linux/sockios.h> |
8522ba09 | 31 | #include <poll.h> |
96fba48f | 32 | #include <stdlib.h> |
8522ba09 | 33 | #include <strings.h> |
50f80534 | 34 | #include <sys/epoll.h> |
10dcf8de | 35 | #include <sys/stat.h> |
96fba48f BP |
36 | #include <unistd.h> |
37 | ||
773cd538 | 38 | #include "bitmap.h" |
96fba48f | 39 | #include "dpif-provider.h" |
80e5eed9 | 40 | #include "dynamic-string.h" |
eb8b28e7 | 41 | #include "flow.h" |
3abc4a1a | 42 | #include "netdev.h" |
032aa6a3 | 43 | #include "netdev-linux.h" |
c3827f61 | 44 | #include "netdev-vport.h" |
45c8d3a1 | 45 | #include "netlink-notifier.h" |
982b8810 | 46 | #include "netlink-socket.h" |
856081f6 | 47 | #include "netlink.h" |
feebdea2 | 48 | #include "odp-util.h" |
96fba48f | 49 | #include "ofpbuf.h" |
213a13ed | 50 | #include "openvswitch/datapath-compat.h" |
e16a28b5 | 51 | #include "openvswitch/tunnel.h" |
856081f6 | 52 | #include "packets.h" |
96fba48f | 53 | #include "poll-loop.h" |
17411ecf | 54 | #include "random.h" |
54825e09 | 55 | #include "shash.h" |
b3c01ed3 | 56 | #include "sset.h" |
d6569377 | 57 | #include "unaligned.h" |
96fba48f | 58 | #include "util.h" |
96fba48f | 59 | #include "vlog.h" |
5136ce49 | 60 | |
d98e6007 | 61 | VLOG_DEFINE_THIS_MODULE(dpif_linux); |
95b1d73a | 62 | enum { MAX_PORTS = USHRT_MAX }; |
773cd538 | 63 | |
17411ecf JG |
64 | enum { N_UPCALL_SOCKS = 16 }; |
65 | BUILD_ASSERT_DECL(IS_POW2(N_UPCALL_SOCKS)); | |
8522ba09 | 66 | BUILD_ASSERT_DECL(N_UPCALL_SOCKS <= 32); /* We use a 32-bit word as a mask. */ |
17411ecf | 67 | |
24b019f8 JP |
68 | /* This ethtool flag was introduced in Linux 2.6.24, so it might be |
69 | * missing if we have old headers. */ | |
70 | #define ETH_FLAG_LRO (1 << 15) /* LRO is enabled */ | |
71 | ||
d6569377 | 72 | struct dpif_linux_dp { |
aaff4b55 BP |
73 | /* Generic Netlink header. */ |
74 | uint8_t cmd; | |
d6569377 | 75 | |
df2c07f4 | 76 | /* struct ovs_header. */ |
254f2dc8 | 77 | int dp_ifindex; |
d6569377 BP |
78 | |
79 | /* Attributes. */ | |
df2c07f4 | 80 | const char *name; /* OVS_DP_ATTR_NAME. */ |
a24a6574 | 81 | const uint32_t *upcall_pid; /* OVS_DP_UPCALL_PID. */ |
df2c07f4 | 82 | struct ovs_dp_stats stats; /* OVS_DP_ATTR_STATS. */ |
d6569377 BP |
83 | }; |
84 | ||
85 | static void dpif_linux_dp_init(struct dpif_linux_dp *); | |
aaff4b55 BP |
86 | static int dpif_linux_dp_from_ofpbuf(struct dpif_linux_dp *, |
87 | const struct ofpbuf *); | |
88 | static void dpif_linux_dp_dump_start(struct nl_dump *); | |
d6569377 BP |
89 | static int dpif_linux_dp_transact(const struct dpif_linux_dp *request, |
90 | struct dpif_linux_dp *reply, | |
91 | struct ofpbuf **bufp); | |
92 | static int dpif_linux_dp_get(const struct dpif *, struct dpif_linux_dp *reply, | |
93 | struct ofpbuf **bufp); | |
94 | ||
95 | struct dpif_linux_flow { | |
37a1300c BP |
96 | /* Generic Netlink header. */ |
97 | uint8_t cmd; | |
d6569377 | 98 | |
df2c07f4 | 99 | /* struct ovs_header. */ |
d6569377 | 100 | unsigned int nlmsg_flags; |
254f2dc8 | 101 | int dp_ifindex; |
d6569377 BP |
102 | |
103 | /* Attributes. | |
104 | * | |
0e70cdcb BP |
105 | * The 'stats' member points to 64-bit data that might only be aligned on |
106 | * 32-bit boundaries, so get_unaligned_u64() should be used to access its | |
107 | * values. | |
d2a23af2 | 108 | * |
df2c07f4 | 109 | * If 'actions' is nonnull then OVS_FLOW_ATTR_ACTIONS will be included in |
d2a23af2 | 110 | * the Netlink version of the command, even if actions_len is zero. */ |
df2c07f4 | 111 | const struct nlattr *key; /* OVS_FLOW_ATTR_KEY. */ |
d6569377 | 112 | size_t key_len; |
df2c07f4 | 113 | const struct nlattr *actions; /* OVS_FLOW_ATTR_ACTIONS. */ |
d6569377 | 114 | size_t actions_len; |
df2c07f4 JP |
115 | const struct ovs_flow_stats *stats; /* OVS_FLOW_ATTR_STATS. */ |
116 | const uint8_t *tcp_flags; /* OVS_FLOW_ATTR_TCP_FLAGS. */ | |
0e70cdcb | 117 | const ovs_32aligned_u64 *used; /* OVS_FLOW_ATTR_USED. */ |
df2c07f4 | 118 | bool clear; /* OVS_FLOW_ATTR_CLEAR. */ |
d6569377 BP |
119 | }; |
120 | ||
121 | static void dpif_linux_flow_init(struct dpif_linux_flow *); | |
37a1300c BP |
122 | static int dpif_linux_flow_from_ofpbuf(struct dpif_linux_flow *, |
123 | const struct ofpbuf *); | |
124 | static void dpif_linux_flow_to_ofpbuf(const struct dpif_linux_flow *, | |
125 | struct ofpbuf *); | |
30b44744 | 126 | static int dpif_linux_flow_transact(struct dpif_linux_flow *request, |
d6569377 BP |
127 | struct dpif_linux_flow *reply, |
128 | struct ofpbuf **bufp); | |
129 | static void dpif_linux_flow_get_stats(const struct dpif_linux_flow *, | |
130 | struct dpif_flow_stats *); | |
131 | ||
96fba48f BP |
132 | /* Datapath interface for the openvswitch Linux kernel module. */ |
133 | struct dpif_linux { | |
134 | struct dpif dpif; | |
254f2dc8 | 135 | int dp_ifindex; |
e9e28be3 | 136 | |
b063d9f0 | 137 | /* Upcall messages. */ |
17411ecf | 138 | struct nl_sock *upcall_socks[N_UPCALL_SOCKS]; |
8522ba09 | 139 | uint32_t ready_mask; /* 1-bit for each sock with unread messages. */ |
50f80534 | 140 | int epoll_fd; /* epoll fd that includes the upcall socks. */ |
982b8810 | 141 | |
e9e28be3 | 142 | /* Change notification. */ |
b3c01ed3 | 143 | struct sset changed_ports; /* Ports that have changed. */ |
2ee6545f | 144 | struct nln_notifier *port_notifier; |
8b61709d | 145 | bool change_error; |
773cd538 | 146 | |
95b1d73a PS |
147 | /* Port number allocation. */ |
148 | uint16_t alloc_port_no; | |
96fba48f BP |
149 | }; |
150 | ||
151 | static struct vlog_rate_limit error_rl = VLOG_RATE_LIMIT_INIT(9999, 5); | |
152 | ||
df2c07f4 JP |
153 | /* Generic Netlink family numbers for OVS. */ |
154 | static int ovs_datapath_family; | |
155 | static int ovs_vport_family; | |
156 | static int ovs_flow_family; | |
157 | static int ovs_packet_family; | |
982b8810 BP |
158 | |
159 | /* Generic Netlink socket. */ | |
160 | static struct nl_sock *genl_sock; | |
c7178a0b | 161 | static struct nln *nln = NULL; |
982b8810 BP |
162 | |
163 | static int dpif_linux_init(void); | |
8f4a4df5 | 164 | static void open_dpif(const struct dpif_linux_dp *, struct dpif **); |
c7178a0b EJ |
165 | static bool dpif_linux_nln_parse(struct ofpbuf *, void *); |
166 | static void dpif_linux_port_changed(const void *vport, void *dpif); | |
a12b3ead | 167 | static uint32_t dpif_linux_port_get_pid(const struct dpif *, uint16_t port_no); |
96fba48f | 168 | |
f0fef760 BP |
169 | static void dpif_linux_vport_to_ofpbuf(const struct dpif_linux_vport *, |
170 | struct ofpbuf *); | |
171 | static int dpif_linux_vport_from_ofpbuf(struct dpif_linux_vport *, | |
172 | const struct ofpbuf *); | |
173 | ||
96fba48f BP |
174 | static struct dpif_linux * |
175 | dpif_linux_cast(const struct dpif *dpif) | |
176 | { | |
177 | dpif_assert_class(dpif, &dpif_linux_class); | |
178 | return CONTAINER_OF(dpif, struct dpif_linux, dpif); | |
179 | } | |
180 | ||
d3d22744 | 181 | static int |
d0c23a1a | 182 | dpif_linux_enumerate(struct sset *all_dps) |
d3d22744 | 183 | { |
aaff4b55 BP |
184 | struct nl_dump dump; |
185 | struct ofpbuf msg; | |
aaff4b55 | 186 | int error; |
982b8810 | 187 | |
aaff4b55 BP |
188 | error = dpif_linux_init(); |
189 | if (error) { | |
190 | return error; | |
982b8810 | 191 | } |
d3d22744 | 192 | |
aaff4b55 BP |
193 | dpif_linux_dp_dump_start(&dump); |
194 | while (nl_dump_next(&dump, &msg)) { | |
195 | struct dpif_linux_dp dp; | |
d6569377 | 196 | |
aaff4b55 | 197 | if (!dpif_linux_dp_from_ofpbuf(&dp, &msg)) { |
d0c23a1a | 198 | sset_add(all_dps, dp.name); |
d3d22744 BP |
199 | } |
200 | } | |
aaff4b55 | 201 | return nl_dump_done(&dump); |
d3d22744 BP |
202 | } |
203 | ||
96fba48f | 204 | static int |
4a387741 BP |
205 | dpif_linux_open(const struct dpif_class *class OVS_UNUSED, const char *name, |
206 | bool create, struct dpif **dpifp) | |
96fba48f | 207 | { |
982b8810 | 208 | struct dpif_linux_dp dp_request, dp; |
c19e6535 | 209 | struct ofpbuf *buf; |
ea36840f | 210 | uint32_t upcall_pid; |
c19e6535 | 211 | int error; |
96fba48f | 212 | |
982b8810 BP |
213 | error = dpif_linux_init(); |
214 | if (error) { | |
215 | return error; | |
216 | } | |
217 | ||
982b8810 BP |
218 | /* Create or look up datapath. */ |
219 | dpif_linux_dp_init(&dp_request); | |
ea36840f BP |
220 | if (create) { |
221 | dp_request.cmd = OVS_DP_CMD_NEW; | |
222 | upcall_pid = 0; | |
223 | dp_request.upcall_pid = &upcall_pid; | |
224 | } else { | |
225 | dp_request.cmd = OVS_DP_CMD_GET; | |
226 | } | |
254f2dc8 | 227 | dp_request.name = name; |
982b8810 BP |
228 | error = dpif_linux_dp_transact(&dp_request, &dp, &buf); |
229 | if (error) { | |
230 | return error; | |
c19e6535 | 231 | } |
254f2dc8 | 232 | |
8f4a4df5 EJ |
233 | open_dpif(&dp, dpifp); |
234 | ofpbuf_delete(buf); | |
235 | return 0; | |
c19e6535 BP |
236 | } |
237 | ||
8f4a4df5 | 238 | static void |
254f2dc8 | 239 | open_dpif(const struct dpif_linux_dp *dp, struct dpif **dpifp) |
c19e6535 | 240 | { |
c19e6535 | 241 | struct dpif_linux *dpif; |
c19e6535 | 242 | |
17411ecf | 243 | dpif = xzalloc(sizeof *dpif); |
2ee6545f EJ |
244 | dpif->port_notifier = nln_notifier_create(nln, dpif_linux_port_changed, |
245 | dpif); | |
50f80534 | 246 | dpif->epoll_fd = -1; |
c19e6535 | 247 | |
254f2dc8 BP |
248 | dpif_init(&dpif->dpif, &dpif_linux_class, dp->name, |
249 | dp->dp_ifindex, dp->dp_ifindex); | |
c19e6535 | 250 | |
254f2dc8 | 251 | dpif->dp_ifindex = dp->dp_ifindex; |
b3c01ed3 | 252 | sset_init(&dpif->changed_ports); |
c19e6535 | 253 | *dpifp = &dpif->dpif; |
96fba48f BP |
254 | } |
255 | ||
17411ecf JG |
256 | static void |
257 | destroy_upcall_socks(struct dpif_linux *dpif) | |
258 | { | |
259 | int i; | |
260 | ||
50f80534 BP |
261 | if (dpif->epoll_fd >= 0) { |
262 | close(dpif->epoll_fd); | |
263 | dpif->epoll_fd = -1; | |
264 | } | |
17411ecf JG |
265 | for (i = 0; i < N_UPCALL_SOCKS; i++) { |
266 | nl_sock_destroy(dpif->upcall_socks[i]); | |
267 | dpif->upcall_socks[i] = NULL; | |
268 | } | |
269 | } | |
270 | ||
96fba48f BP |
271 | static void |
272 | dpif_linux_close(struct dpif *dpif_) | |
273 | { | |
274 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
c7178a0b | 275 | |
2ee6545f | 276 | nln_notifier_destroy(dpif->port_notifier); |
17411ecf | 277 | destroy_upcall_socks(dpif); |
b3c01ed3 | 278 | sset_destroy(&dpif->changed_ports); |
96fba48f BP |
279 | free(dpif); |
280 | } | |
281 | ||
282 | static int | |
7dab847a | 283 | dpif_linux_destroy(struct dpif *dpif_) |
96fba48f | 284 | { |
d6569377 BP |
285 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
286 | struct dpif_linux_dp dp; | |
287 | ||
288 | dpif_linux_dp_init(&dp); | |
df2c07f4 | 289 | dp.cmd = OVS_DP_CMD_DEL; |
254f2dc8 | 290 | dp.dp_ifindex = dpif->dp_ifindex; |
d6569377 | 291 | return dpif_linux_dp_transact(&dp, NULL, NULL); |
96fba48f BP |
292 | } |
293 | ||
d8abf60c EJ |
294 | static void |
295 | dpif_linux_run(struct dpif *dpif OVS_UNUSED) | |
296 | { | |
c7178a0b | 297 | if (nln) { |
18a23781 | 298 | nln_run(nln); |
c7178a0b | 299 | } |
d8abf60c EJ |
300 | } |
301 | ||
302 | static void | |
303 | dpif_linux_wait(struct dpif *dpif OVS_UNUSED) | |
304 | { | |
c7178a0b | 305 | if (nln) { |
18a23781 | 306 | nln_wait(nln); |
c7178a0b | 307 | } |
d8abf60c EJ |
308 | } |
309 | ||
96fba48f | 310 | static int |
a8d9304d | 311 | dpif_linux_get_stats(const struct dpif *dpif_, struct dpif_dp_stats *stats) |
96fba48f | 312 | { |
d6569377 BP |
313 | struct dpif_linux_dp dp; |
314 | struct ofpbuf *buf; | |
315 | int error; | |
316 | ||
317 | error = dpif_linux_dp_get(dpif_, &dp, &buf); | |
318 | if (!error) { | |
a8d9304d BP |
319 | stats->n_hit = dp.stats.n_hit; |
320 | stats->n_missed = dp.stats.n_missed; | |
321 | stats->n_lost = dp.stats.n_lost; | |
322 | stats->n_flows = dp.stats.n_flows; | |
d6569377 BP |
323 | ofpbuf_delete(buf); |
324 | } | |
325 | return error; | |
96fba48f BP |
326 | } |
327 | ||
96fba48f | 328 | static int |
c19e6535 | 329 | dpif_linux_port_add(struct dpif *dpif_, struct netdev *netdev, |
c3827f61 | 330 | uint16_t *port_nop) |
96fba48f | 331 | { |
c19e6535 | 332 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
c3827f61 BP |
333 | const char *name = netdev_get_name(netdev); |
334 | const char *type = netdev_get_type(netdev); | |
c19e6535 BP |
335 | struct dpif_linux_vport request, reply; |
336 | const struct ofpbuf *options; | |
337 | struct ofpbuf *buf; | |
95b1d73a | 338 | int error, i = 0, max_ports = MAX_PORTS; |
96fba48f | 339 | |
c19e6535 | 340 | dpif_linux_vport_init(&request); |
df2c07f4 | 341 | request.cmd = OVS_VPORT_CMD_NEW; |
254f2dc8 | 342 | request.dp_ifindex = dpif->dp_ifindex; |
c19e6535 | 343 | request.type = netdev_vport_get_vport_type(netdev); |
df2c07f4 | 344 | if (request.type == OVS_VPORT_TYPE_UNSPEC) { |
c283069c BP |
345 | VLOG_WARN_RL(&error_rl, "%s: cannot create port `%s' because it has " |
346 | "unsupported type `%s'", | |
c19e6535 | 347 | dpif_name(dpif_), name, type); |
c283069c BP |
348 | return EINVAL; |
349 | } | |
c19e6535 | 350 | request.name = name; |
c3827f61 | 351 | |
c19e6535 BP |
352 | options = netdev_vport_get_options(netdev); |
353 | if (options && options->size) { | |
354 | request.options = options->data; | |
355 | request.options_len = options->size; | |
356 | } | |
357 | ||
24b019f8 JP |
358 | if (request.type == OVS_VPORT_TYPE_NETDEV) { |
359 | netdev_linux_ethtool_set_flag(netdev, ETH_FLAG_LRO, "LRO", false); | |
360 | } | |
361 | ||
773cd538 EJ |
362 | /* Loop until we find a port that isn't used. */ |
363 | do { | |
a24a6574 BP |
364 | uint32_t upcall_pid; |
365 | ||
95b1d73a | 366 | request.port_no = ++dpif->alloc_port_no; |
a12b3ead | 367 | upcall_pid = dpif_linux_port_get_pid(dpif_, request.port_no); |
a24a6574 | 368 | request.upcall_pid = &upcall_pid; |
773cd538 EJ |
369 | error = dpif_linux_vport_transact(&request, &reply, &buf); |
370 | ||
371 | if (!error) { | |
372 | *port_nop = reply.port_no; | |
a24a6574 BP |
373 | VLOG_DBG("%s: assigning port %"PRIu32" to netlink pid %"PRIu32, |
374 | dpif_name(dpif_), request.port_no, upcall_pid); | |
95b1d73a PS |
375 | } else if (error == EFBIG) { |
376 | /* Older datapath has lower limit. */ | |
377 | max_ports = dpif->alloc_port_no; | |
378 | dpif->alloc_port_no = 0; | |
773cd538 | 379 | } |
95b1d73a | 380 | |
c19e6535 | 381 | ofpbuf_delete(buf); |
95b1d73a | 382 | } while ((i++ < max_ports) |
773cd538 | 383 | && (error == EBUSY || error == EFBIG)); |
c3827f61 | 384 | |
96fba48f BP |
385 | return error; |
386 | } | |
387 | ||
388 | static int | |
c19e6535 | 389 | dpif_linux_port_del(struct dpif *dpif_, uint16_t port_no) |
96fba48f | 390 | { |
c19e6535 BP |
391 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
392 | struct dpif_linux_vport vport; | |
773cd538 | 393 | int error; |
c19e6535 BP |
394 | |
395 | dpif_linux_vport_init(&vport); | |
df2c07f4 | 396 | vport.cmd = OVS_VPORT_CMD_DEL; |
254f2dc8 | 397 | vport.dp_ifindex = dpif->dp_ifindex; |
c19e6535 | 398 | vport.port_no = port_no; |
773cd538 EJ |
399 | error = dpif_linux_vport_transact(&vport, NULL, NULL); |
400 | ||
773cd538 | 401 | return error; |
c3827f61 | 402 | } |
3abc4a1a | 403 | |
c3827f61 | 404 | static int |
4c738a8d BP |
405 | dpif_linux_port_query__(const struct dpif *dpif, uint32_t port_no, |
406 | const char *port_name, struct dpif_port *dpif_port) | |
c3827f61 | 407 | { |
c19e6535 BP |
408 | struct dpif_linux_vport request; |
409 | struct dpif_linux_vport reply; | |
410 | struct ofpbuf *buf; | |
4c738a8d BP |
411 | int error; |
412 | ||
c19e6535 | 413 | dpif_linux_vport_init(&request); |
df2c07f4 | 414 | request.cmd = OVS_VPORT_CMD_GET; |
254f2dc8 | 415 | request.dp_ifindex = dpif_linux_cast(dpif)->dp_ifindex; |
c19e6535 BP |
416 | request.port_no = port_no; |
417 | request.name = port_name; | |
4c738a8d | 418 | |
c19e6535 BP |
419 | error = dpif_linux_vport_transact(&request, &reply, &buf); |
420 | if (!error) { | |
33db1592 BP |
421 | if (reply.dp_ifindex != request.dp_ifindex) { |
422 | /* A query by name reported that 'port_name' is in some datapath | |
423 | * other than 'dpif', but the caller wants to know about 'dpif'. */ | |
424 | error = ENODEV; | |
425 | } else { | |
426 | dpif_port->name = xstrdup(reply.name); | |
427 | dpif_port->type = xstrdup(netdev_vport_get_netdev_type(&reply)); | |
428 | dpif_port->port_no = reply.port_no; | |
429 | } | |
c19e6535 | 430 | ofpbuf_delete(buf); |
3abc4a1a | 431 | } |
c19e6535 | 432 | return error; |
96fba48f BP |
433 | } |
434 | ||
435 | static int | |
c3827f61 | 436 | dpif_linux_port_query_by_number(const struct dpif *dpif, uint16_t port_no, |
4c738a8d | 437 | struct dpif_port *dpif_port) |
96fba48f | 438 | { |
c19e6535 | 439 | return dpif_linux_port_query__(dpif, port_no, NULL, dpif_port); |
96fba48f BP |
440 | } |
441 | ||
442 | static int | |
4c738a8d BP |
443 | dpif_linux_port_query_by_name(const struct dpif *dpif, const char *devname, |
444 | struct dpif_port *dpif_port) | |
96fba48f | 445 | { |
4c738a8d | 446 | return dpif_linux_port_query__(dpif, 0, devname, dpif_port); |
96fba48f BP |
447 | } |
448 | ||
996c1b3d BP |
449 | static int |
450 | dpif_linux_get_max_ports(const struct dpif *dpif OVS_UNUSED) | |
451 | { | |
95b1d73a | 452 | return MAX_PORTS; |
996c1b3d BP |
453 | } |
454 | ||
98403001 | 455 | static uint32_t |
a12b3ead | 456 | dpif_linux_port_get_pid(const struct dpif *dpif_, uint16_t port_no) |
98403001 BP |
457 | { |
458 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
459 | ||
a12b3ead | 460 | if (dpif->epoll_fd < 0) { |
98403001 BP |
461 | return 0; |
462 | } else { | |
463 | int idx = port_no & (N_UPCALL_SOCKS - 1); | |
464 | return nl_sock_pid(dpif->upcall_socks[idx]); | |
465 | } | |
466 | } | |
467 | ||
96fba48f BP |
468 | static int |
469 | dpif_linux_flow_flush(struct dpif *dpif_) | |
470 | { | |
9c52546b | 471 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
37a1300c BP |
472 | struct dpif_linux_flow flow; |
473 | ||
474 | dpif_linux_flow_init(&flow); | |
df2c07f4 | 475 | flow.cmd = OVS_FLOW_CMD_DEL; |
254f2dc8 | 476 | flow.dp_ifindex = dpif->dp_ifindex; |
37a1300c | 477 | return dpif_linux_flow_transact(&flow, NULL, NULL); |
96fba48f BP |
478 | } |
479 | ||
c19e6535 | 480 | struct dpif_linux_port_state { |
f0fef760 | 481 | struct nl_dump dump; |
c19e6535 BP |
482 | }; |
483 | ||
96fba48f | 484 | static int |
f0fef760 | 485 | dpif_linux_port_dump_start(const struct dpif *dpif_, void **statep) |
96fba48f | 486 | { |
f0fef760 BP |
487 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
488 | struct dpif_linux_port_state *state; | |
489 | struct dpif_linux_vport request; | |
490 | struct ofpbuf *buf; | |
491 | ||
492 | *statep = state = xmalloc(sizeof *state); | |
493 | ||
494 | dpif_linux_vport_init(&request); | |
df2c07f4 | 495 | request.cmd = OVS_DP_CMD_GET; |
254f2dc8 | 496 | request.dp_ifindex = dpif->dp_ifindex; |
f0fef760 BP |
497 | |
498 | buf = ofpbuf_new(1024); | |
499 | dpif_linux_vport_to_ofpbuf(&request, buf); | |
500 | nl_dump_start(&state->dump, genl_sock, buf); | |
501 | ofpbuf_delete(buf); | |
502 | ||
b0ec0f27 BP |
503 | return 0; |
504 | } | |
505 | ||
506 | static int | |
f0fef760 | 507 | dpif_linux_port_dump_next(const struct dpif *dpif OVS_UNUSED, void *state_, |
4c738a8d | 508 | struct dpif_port *dpif_port) |
b0ec0f27 | 509 | { |
c19e6535 | 510 | struct dpif_linux_port_state *state = state_; |
f0fef760 BP |
511 | struct dpif_linux_vport vport; |
512 | struct ofpbuf buf; | |
96fba48f BP |
513 | int error; |
514 | ||
f0fef760 BP |
515 | if (!nl_dump_next(&state->dump, &buf)) { |
516 | return EOF; | |
517 | } | |
c19e6535 | 518 | |
f0fef760 | 519 | error = dpif_linux_vport_from_ofpbuf(&vport, &buf); |
c3827f61 | 520 | if (error) { |
f0fef760 | 521 | return error; |
c3827f61 | 522 | } |
f0fef760 BP |
523 | |
524 | dpif_port->name = (char *) vport.name; | |
525 | dpif_port->type = (char *) netdev_vport_get_netdev_type(&vport); | |
526 | dpif_port->port_no = vport.port_no; | |
527 | return 0; | |
b0ec0f27 BP |
528 | } |
529 | ||
530 | static int | |
95b1d73a | 531 | dpif_linux_port_dump_done(const struct dpif *dpif_ OVS_UNUSED, void *state_) |
b0ec0f27 | 532 | { |
c19e6535 | 533 | struct dpif_linux_port_state *state = state_; |
f0fef760 | 534 | int error = nl_dump_done(&state->dump); |
8522b383 | 535 | |
b0ec0f27 | 536 | free(state); |
f0fef760 | 537 | return error; |
96fba48f BP |
538 | } |
539 | ||
e9e28be3 BP |
540 | static int |
541 | dpif_linux_port_poll(const struct dpif *dpif_, char **devnamep) | |
542 | { | |
543 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
e9e28be3 | 544 | |
8b61709d BP |
545 | if (dpif->change_error) { |
546 | dpif->change_error = false; | |
b3c01ed3 | 547 | sset_clear(&dpif->changed_ports); |
8b61709d | 548 | return ENOBUFS; |
b3c01ed3 BP |
549 | } else if (!sset_is_empty(&dpif->changed_ports)) { |
550 | *devnamep = sset_pop(&dpif->changed_ports); | |
8b61709d | 551 | return 0; |
e9e28be3 | 552 | } else { |
8b61709d | 553 | return EAGAIN; |
e9e28be3 | 554 | } |
e9e28be3 BP |
555 | } |
556 | ||
557 | static void | |
558 | dpif_linux_port_poll_wait(const struct dpif *dpif_) | |
559 | { | |
560 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
b3c01ed3 | 561 | if (!sset_is_empty(&dpif->changed_ports) || dpif->change_error) { |
e9e28be3 | 562 | poll_immediate_wake(); |
e9e28be3 BP |
563 | } |
564 | } | |
565 | ||
96fba48f | 566 | static int |
30053024 BP |
567 | dpif_linux_flow_get__(const struct dpif *dpif_, |
568 | const struct nlattr *key, size_t key_len, | |
569 | struct dpif_linux_flow *reply, struct ofpbuf **bufp) | |
96fba48f | 570 | { |
9c52546b | 571 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
30053024 | 572 | struct dpif_linux_flow request; |
feebdea2 | 573 | |
d6569377 | 574 | dpif_linux_flow_init(&request); |
df2c07f4 | 575 | request.cmd = OVS_FLOW_CMD_GET; |
254f2dc8 | 576 | request.dp_ifindex = dpif->dp_ifindex; |
d6569377 BP |
577 | request.key = key; |
578 | request.key_len = key_len; | |
30053024 BP |
579 | return dpif_linux_flow_transact(&request, reply, bufp); |
580 | } | |
581 | ||
582 | static int | |
583 | dpif_linux_flow_get(const struct dpif *dpif_, | |
584 | const struct nlattr *key, size_t key_len, | |
585 | struct ofpbuf **actionsp, struct dpif_flow_stats *stats) | |
586 | { | |
587 | struct dpif_linux_flow reply; | |
588 | struct ofpbuf *buf; | |
589 | int error; | |
590 | ||
591 | error = dpif_linux_flow_get__(dpif_, key, key_len, &reply, &buf); | |
feebdea2 BP |
592 | if (!error) { |
593 | if (stats) { | |
d6569377 | 594 | dpif_linux_flow_get_stats(&reply, stats); |
feebdea2 | 595 | } |
d6569377 BP |
596 | if (actionsp) { |
597 | buf->data = (void *) reply.actions; | |
598 | buf->size = reply.actions_len; | |
599 | *actionsp = buf; | |
600 | } else { | |
601 | ofpbuf_delete(buf); | |
feebdea2 BP |
602 | } |
603 | } | |
604 | return error; | |
96fba48f BP |
605 | } |
606 | ||
6bc60024 | 607 | static void |
89625d1e | 608 | dpif_linux_init_flow_put(struct dpif *dpif_, const struct dpif_flow_put *put, |
6bc60024 BP |
609 | struct dpif_linux_flow *request) |
610 | { | |
611 | static struct nlattr dummy_action; | |
612 | ||
613 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
614 | ||
615 | dpif_linux_flow_init(request); | |
89625d1e | 616 | request->cmd = (put->flags & DPIF_FP_CREATE |
6bc60024 BP |
617 | ? OVS_FLOW_CMD_NEW : OVS_FLOW_CMD_SET); |
618 | request->dp_ifindex = dpif->dp_ifindex; | |
89625d1e BP |
619 | request->key = put->key; |
620 | request->key_len = put->key_len; | |
6bc60024 | 621 | /* Ensure that OVS_FLOW_ATTR_ACTIONS will always be included. */ |
89625d1e BP |
622 | request->actions = put->actions ? put->actions : &dummy_action; |
623 | request->actions_len = put->actions_len; | |
624 | if (put->flags & DPIF_FP_ZERO_STATS) { | |
6bc60024 BP |
625 | request->clear = true; |
626 | } | |
89625d1e | 627 | request->nlmsg_flags = put->flags & DPIF_FP_MODIFY ? 0 : NLM_F_CREATE; |
6bc60024 BP |
628 | } |
629 | ||
96fba48f | 630 | static int |
89625d1e | 631 | dpif_linux_flow_put(struct dpif *dpif_, const struct dpif_flow_put *put) |
96fba48f | 632 | { |
d6569377 BP |
633 | struct dpif_linux_flow request, reply; |
634 | struct ofpbuf *buf; | |
feebdea2 BP |
635 | int error; |
636 | ||
89625d1e | 637 | dpif_linux_init_flow_put(dpif_, put, &request); |
d6569377 | 638 | error = dpif_linux_flow_transact(&request, |
89625d1e BP |
639 | put->stats ? &reply : NULL, |
640 | put->stats ? &buf : NULL); | |
641 | if (!error && put->stats) { | |
642 | dpif_linux_flow_get_stats(&reply, put->stats); | |
d6569377 | 643 | ofpbuf_delete(buf); |
feebdea2 BP |
644 | } |
645 | return error; | |
96fba48f BP |
646 | } |
647 | ||
b99d3cee BP |
648 | static void |
649 | dpif_linux_init_flow_del(struct dpif *dpif_, const struct dpif_flow_del *del, | |
650 | struct dpif_linux_flow *request) | |
96fba48f | 651 | { |
9c52546b | 652 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
b99d3cee BP |
653 | |
654 | dpif_linux_flow_init(request); | |
655 | request->cmd = OVS_FLOW_CMD_DEL; | |
656 | request->dp_ifindex = dpif->dp_ifindex; | |
657 | request->key = del->key; | |
658 | request->key_len = del->key_len; | |
659 | } | |
660 | ||
661 | static int | |
662 | dpif_linux_flow_del(struct dpif *dpif_, const struct dpif_flow_del *del) | |
663 | { | |
d6569377 BP |
664 | struct dpif_linux_flow request, reply; |
665 | struct ofpbuf *buf; | |
feebdea2 BP |
666 | int error; |
667 | ||
b99d3cee | 668 | dpif_linux_init_flow_del(dpif_, del, &request); |
d6569377 | 669 | error = dpif_linux_flow_transact(&request, |
b99d3cee BP |
670 | del->stats ? &reply : NULL, |
671 | del->stats ? &buf : NULL); | |
672 | if (!error && del->stats) { | |
673 | dpif_linux_flow_get_stats(&reply, del->stats); | |
d6569377 | 674 | ofpbuf_delete(buf); |
feebdea2 BP |
675 | } |
676 | return error; | |
96fba48f BP |
677 | } |
678 | ||
feebdea2 | 679 | struct dpif_linux_flow_state { |
37a1300c | 680 | struct nl_dump dump; |
d6569377 | 681 | struct dpif_linux_flow flow; |
c97fb132 | 682 | struct dpif_flow_stats stats; |
30053024 | 683 | struct ofpbuf *buf; |
feebdea2 BP |
684 | }; |
685 | ||
96fba48f | 686 | static int |
37a1300c | 687 | dpif_linux_flow_dump_start(const struct dpif *dpif_, void **statep) |
96fba48f | 688 | { |
37a1300c BP |
689 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
690 | struct dpif_linux_flow_state *state; | |
691 | struct dpif_linux_flow request; | |
692 | struct ofpbuf *buf; | |
693 | ||
694 | *statep = state = xmalloc(sizeof *state); | |
695 | ||
696 | dpif_linux_flow_init(&request); | |
df2c07f4 | 697 | request.cmd = OVS_DP_CMD_GET; |
254f2dc8 | 698 | request.dp_ifindex = dpif->dp_ifindex; |
37a1300c BP |
699 | |
700 | buf = ofpbuf_new(1024); | |
701 | dpif_linux_flow_to_ofpbuf(&request, buf); | |
702 | nl_dump_start(&state->dump, genl_sock, buf); | |
703 | ofpbuf_delete(buf); | |
704 | ||
30053024 BP |
705 | state->buf = NULL; |
706 | ||
704a1e09 BP |
707 | return 0; |
708 | } | |
709 | ||
710 | static int | |
37a1300c | 711 | dpif_linux_flow_dump_next(const struct dpif *dpif_ OVS_UNUSED, void *state_, |
feebdea2 BP |
712 | const struct nlattr **key, size_t *key_len, |
713 | const struct nlattr **actions, size_t *actions_len, | |
c97fb132 | 714 | const struct dpif_flow_stats **stats) |
704a1e09 | 715 | { |
feebdea2 | 716 | struct dpif_linux_flow_state *state = state_; |
37a1300c | 717 | struct ofpbuf buf; |
96fba48f BP |
718 | int error; |
719 | ||
30053024 BP |
720 | do { |
721 | ofpbuf_delete(state->buf); | |
722 | state->buf = NULL; | |
feebdea2 | 723 | |
30053024 BP |
724 | if (!nl_dump_next(&state->dump, &buf)) { |
725 | return EOF; | |
feebdea2 | 726 | } |
30053024 BP |
727 | |
728 | error = dpif_linux_flow_from_ofpbuf(&state->flow, &buf); | |
729 | if (error) { | |
730 | return error; | |
feebdea2 | 731 | } |
30053024 BP |
732 | |
733 | if (actions && !state->flow.actions) { | |
734 | error = dpif_linux_flow_get__(dpif_, state->flow.key, | |
735 | state->flow.key_len, | |
736 | &state->flow, &state->buf); | |
737 | if (error == ENOENT) { | |
738 | VLOG_DBG("dumped flow disappeared on get"); | |
739 | } else if (error) { | |
740 | VLOG_WARN("error fetching dumped flow: %s", strerror(error)); | |
741 | } | |
feebdea2 | 742 | } |
30053024 BP |
743 | } while (error); |
744 | ||
745 | if (actions) { | |
746 | *actions = state->flow.actions; | |
747 | *actions_len = state->flow.actions_len; | |
748 | } | |
749 | if (key) { | |
750 | *key = state->flow.key; | |
751 | *key_len = state->flow.key_len; | |
752 | } | |
753 | if (stats) { | |
754 | dpif_linux_flow_get_stats(&state->flow, &state->stats); | |
755 | *stats = &state->stats; | |
feebdea2 | 756 | } |
37a1300c | 757 | return error; |
704a1e09 BP |
758 | } |
759 | ||
760 | static int | |
d6569377 | 761 | dpif_linux_flow_dump_done(const struct dpif *dpif OVS_UNUSED, void *state_) |
704a1e09 | 762 | { |
d6569377 | 763 | struct dpif_linux_flow_state *state = state_; |
37a1300c | 764 | int error = nl_dump_done(&state->dump); |
30053024 | 765 | ofpbuf_delete(state->buf); |
704a1e09 | 766 | free(state); |
37a1300c | 767 | return error; |
96fba48f BP |
768 | } |
769 | ||
eabe7c68 BP |
770 | static void |
771 | dpif_linux_encode_execute(int dp_ifindex, const struct dpif_execute *d_exec, | |
772 | struct ofpbuf *buf) | |
96fba48f | 773 | { |
89625d1e | 774 | struct ovs_header *k_exec; |
f7cd0081 | 775 | |
eabe7c68 BP |
776 | ofpbuf_prealloc_tailroom(buf, (64 |
777 | + d_exec->packet->size | |
778 | + d_exec->key_len | |
779 | + d_exec->actions_len)); | |
f7cd0081 | 780 | |
df2c07f4 | 781 | nl_msg_put_genlmsghdr(buf, 0, ovs_packet_family, NLM_F_REQUEST, |
69685a88 | 782 | OVS_PACKET_CMD_EXECUTE, OVS_PACKET_VERSION); |
f7cd0081 | 783 | |
89625d1e BP |
784 | k_exec = ofpbuf_put_uninit(buf, sizeof *k_exec); |
785 | k_exec->dp_ifindex = dp_ifindex; | |
f7cd0081 | 786 | |
89625d1e BP |
787 | nl_msg_put_unspec(buf, OVS_PACKET_ATTR_PACKET, |
788 | d_exec->packet->data, d_exec->packet->size); | |
789 | nl_msg_put_unspec(buf, OVS_PACKET_ATTR_KEY, d_exec->key, d_exec->key_len); | |
790 | nl_msg_put_unspec(buf, OVS_PACKET_ATTR_ACTIONS, | |
791 | d_exec->actions, d_exec->actions_len); | |
6bc60024 BP |
792 | } |
793 | ||
794 | static int | |
89625d1e | 795 | dpif_linux_execute__(int dp_ifindex, const struct dpif_execute *execute) |
6bc60024 | 796 | { |
eabe7c68 BP |
797 | uint64_t request_stub[1024 / 8]; |
798 | struct ofpbuf request; | |
6bc60024 BP |
799 | int error; |
800 | ||
eabe7c68 BP |
801 | ofpbuf_use_stub(&request, request_stub, sizeof request_stub); |
802 | dpif_linux_encode_execute(dp_ifindex, execute, &request); | |
803 | error = nl_sock_transact(genl_sock, &request, NULL); | |
804 | ofpbuf_uninit(&request); | |
6bc60024 | 805 | |
f7cd0081 | 806 | return error; |
96fba48f BP |
807 | } |
808 | ||
eb8b28e7 | 809 | static int |
89625d1e | 810 | dpif_linux_execute(struct dpif *dpif_, const struct dpif_execute *execute) |
eb8b28e7 EJ |
811 | { |
812 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
813 | ||
89625d1e | 814 | return dpif_linux_execute__(dpif->dp_ifindex, execute); |
eb8b28e7 EJ |
815 | } |
816 | ||
eabe7c68 BP |
817 | #define MAX_OPS 50 |
818 | ||
6bc60024 | 819 | static void |
eabe7c68 | 820 | dpif_linux_operate__(struct dpif *dpif_, struct dpif_op **ops, size_t n_ops) |
6bc60024 BP |
821 | { |
822 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
eabe7c68 BP |
823 | |
824 | struct op_auxdata { | |
825 | struct nl_transaction txn; | |
72d32ac0 | 826 | |
eabe7c68 BP |
827 | struct ofpbuf request; |
828 | uint64_t request_stub[1024 / 8]; | |
72d32ac0 BP |
829 | |
830 | struct ofpbuf reply; | |
831 | uint64_t reply_stub[1024 / 8]; | |
eabe7c68 BP |
832 | } auxes[MAX_OPS]; |
833 | ||
834 | struct nl_transaction *txnsp[MAX_OPS]; | |
6bc60024 BP |
835 | size_t i; |
836 | ||
eabe7c68 | 837 | assert(n_ops <= MAX_OPS); |
6bc60024 | 838 | for (i = 0; i < n_ops; i++) { |
eabe7c68 | 839 | struct op_auxdata *aux = &auxes[i]; |
c2b565b5 | 840 | struct dpif_op *op = ops[i]; |
b99d3cee BP |
841 | struct dpif_flow_put *put; |
842 | struct dpif_flow_del *del; | |
843 | struct dpif_execute *execute; | |
eabe7c68 BP |
844 | struct dpif_linux_flow flow; |
845 | ||
846 | ofpbuf_use_stub(&aux->request, | |
847 | aux->request_stub, sizeof aux->request_stub); | |
848 | aux->txn.request = &aux->request; | |
b99d3cee | 849 | |
72d32ac0 BP |
850 | ofpbuf_use_stub(&aux->reply, aux->reply_stub, sizeof aux->reply_stub); |
851 | aux->txn.reply = NULL; | |
852 | ||
b99d3cee BP |
853 | switch (op->type) { |
854 | case DPIF_OP_FLOW_PUT: | |
855 | put = &op->u.flow_put; | |
eabe7c68 | 856 | dpif_linux_init_flow_put(dpif_, put, &flow); |
6bc60024 | 857 | if (put->stats) { |
eabe7c68 | 858 | flow.nlmsg_flags |= NLM_F_ECHO; |
72d32ac0 | 859 | aux->txn.reply = &aux->reply; |
6bc60024 | 860 | } |
eabe7c68 | 861 | dpif_linux_flow_to_ofpbuf(&flow, &aux->request); |
b99d3cee BP |
862 | break; |
863 | ||
864 | case DPIF_OP_FLOW_DEL: | |
865 | del = &op->u.flow_del; | |
eabe7c68 | 866 | dpif_linux_init_flow_del(dpif_, del, &flow); |
b99d3cee | 867 | if (del->stats) { |
eabe7c68 | 868 | flow.nlmsg_flags |= NLM_F_ECHO; |
72d32ac0 | 869 | aux->txn.reply = &aux->reply; |
b99d3cee | 870 | } |
eabe7c68 | 871 | dpif_linux_flow_to_ofpbuf(&flow, &aux->request); |
b99d3cee | 872 | break; |
6bc60024 | 873 | |
b99d3cee BP |
874 | case DPIF_OP_EXECUTE: |
875 | execute = &op->u.execute; | |
eabe7c68 BP |
876 | dpif_linux_encode_execute(dpif->dp_ifindex, execute, |
877 | &aux->request); | |
b99d3cee BP |
878 | break; |
879 | ||
880 | default: | |
6bc60024 BP |
881 | NOT_REACHED(); |
882 | } | |
883 | } | |
884 | ||
6bc60024 | 885 | for (i = 0; i < n_ops; i++) { |
eabe7c68 | 886 | txnsp[i] = &auxes[i].txn; |
6bc60024 | 887 | } |
6bc60024 BP |
888 | nl_sock_transact_multiple(genl_sock, txnsp, n_ops); |
889 | ||
6bc60024 | 890 | for (i = 0; i < n_ops; i++) { |
72d32ac0 | 891 | struct op_auxdata *aux = &auxes[i]; |
eabe7c68 | 892 | struct nl_transaction *txn = &auxes[i].txn; |
c2b565b5 | 893 | struct dpif_op *op = ops[i]; |
b99d3cee BP |
894 | struct dpif_flow_put *put; |
895 | struct dpif_flow_del *del; | |
6bc60024 | 896 | |
b99d3cee | 897 | op->error = txn->error; |
6bc60024 | 898 | |
b99d3cee BP |
899 | switch (op->type) { |
900 | case DPIF_OP_FLOW_PUT: | |
901 | put = &op->u.flow_put; | |
902 | if (!op->error && put->stats) { | |
6bc60024 BP |
903 | struct dpif_linux_flow reply; |
904 | ||
b99d3cee BP |
905 | op->error = dpif_linux_flow_from_ofpbuf(&reply, txn->reply); |
906 | if (!op->error) { | |
6bc60024 BP |
907 | dpif_linux_flow_get_stats(&reply, put->stats); |
908 | } | |
909 | } | |
b99d3cee BP |
910 | break; |
911 | ||
912 | case DPIF_OP_FLOW_DEL: | |
913 | del = &op->u.flow_del; | |
914 | if (!op->error && del->stats) { | |
915 | struct dpif_linux_flow reply; | |
916 | ||
917 | op->error = dpif_linux_flow_from_ofpbuf(&reply, txn->reply); | |
918 | if (!op->error) { | |
919 | dpif_linux_flow_get_stats(&reply, del->stats); | |
920 | } | |
921 | } | |
922 | break; | |
923 | ||
924 | case DPIF_OP_EXECUTE: | |
925 | break; | |
926 | ||
927 | default: | |
6bc60024 BP |
928 | NOT_REACHED(); |
929 | } | |
930 | ||
72d32ac0 BP |
931 | ofpbuf_uninit(&aux->request); |
932 | ofpbuf_uninit(&aux->reply); | |
6bc60024 | 933 | } |
eabe7c68 BP |
934 | } |
935 | ||
936 | static void | |
937 | dpif_linux_operate(struct dpif *dpif, struct dpif_op **ops, size_t n_ops) | |
938 | { | |
939 | while (n_ops > 0) { | |
940 | size_t chunk = MIN(n_ops, MAX_OPS); | |
941 | dpif_linux_operate__(dpif, ops, chunk); | |
942 | ops += chunk; | |
943 | n_ops -= chunk; | |
944 | } | |
6bc60024 BP |
945 | } |
946 | ||
17411ecf | 947 | static void |
98403001 | 948 | set_upcall_pids(struct dpif *dpif_) |
17411ecf | 949 | { |
98403001 | 950 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
17411ecf | 951 | struct dpif_port_dump port_dump; |
98403001 | 952 | struct dpif_port port; |
17411ecf JG |
953 | int error; |
954 | ||
955 | DPIF_PORT_FOR_EACH (&port, &port_dump, &dpif->dpif) { | |
a12b3ead | 956 | uint32_t upcall_pid = dpif_linux_port_get_pid(dpif_, port.port_no); |
17411ecf JG |
957 | struct dpif_linux_vport vport_request; |
958 | ||
959 | dpif_linux_vport_init(&vport_request); | |
960 | vport_request.cmd = OVS_VPORT_CMD_SET; | |
961 | vport_request.dp_ifindex = dpif->dp_ifindex; | |
962 | vport_request.port_no = port.port_no; | |
a24a6574 | 963 | vport_request.upcall_pid = &upcall_pid; |
17411ecf JG |
964 | error = dpif_linux_vport_transact(&vport_request, NULL, NULL); |
965 | if (!error) { | |
a24a6574 | 966 | VLOG_DBG("%s: assigning port %"PRIu32" to netlink pid %"PRIu32, |
17411ecf | 967 | dpif_name(&dpif->dpif), vport_request.port_no, |
a24a6574 | 968 | upcall_pid); |
17411ecf JG |
969 | } else { |
970 | VLOG_WARN_RL(&error_rl, "%s: failed to set upcall pid on port: %s", | |
971 | dpif_name(&dpif->dpif), strerror(error)); | |
972 | } | |
973 | } | |
17411ecf JG |
974 | } |
975 | ||
96fba48f | 976 | static int |
a12b3ead | 977 | dpif_linux_recv_set(struct dpif *dpif_, bool enable) |
96fba48f | 978 | { |
982b8810 | 979 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); |
982b8810 | 980 | |
a12b3ead | 981 | if ((dpif->epoll_fd >= 0) == enable) { |
982b8810 | 982 | return 0; |
17411ecf | 983 | } |
b063d9f0 | 984 | |
a12b3ead | 985 | if (!enable) { |
17411ecf | 986 | destroy_upcall_socks(dpif); |
a12b3ead | 987 | } else { |
17411ecf JG |
988 | int i; |
989 | int error; | |
982b8810 | 990 | |
50f80534 BP |
991 | dpif->epoll_fd = epoll_create(N_UPCALL_SOCKS); |
992 | if (dpif->epoll_fd < 0) { | |
993 | return errno; | |
994 | } | |
995 | ||
17411ecf | 996 | for (i = 0; i < N_UPCALL_SOCKS; i++) { |
50f80534 BP |
997 | struct epoll_event event; |
998 | ||
17411ecf | 999 | error = nl_sock_create(NETLINK_GENERIC, &dpif->upcall_socks[i]); |
b063d9f0 | 1000 | if (error) { |
17411ecf JG |
1001 | destroy_upcall_socks(dpif); |
1002 | return error; | |
982b8810 | 1003 | } |
50f80534 | 1004 | |
733c8d13 | 1005 | memset(&event, 0, sizeof event); |
50f80534 BP |
1006 | event.events = EPOLLIN; |
1007 | event.data.u32 = i; | |
1008 | if (epoll_ctl(dpif->epoll_fd, EPOLL_CTL_ADD, | |
1009 | nl_sock_fd(dpif->upcall_socks[i]), &event) < 0) { | |
1010 | error = errno; | |
1011 | destroy_upcall_socks(dpif); | |
1012 | return error; | |
1013 | } | |
982b8810 | 1014 | } |
8522ba09 BP |
1015 | |
1016 | dpif->ready_mask = 0; | |
982b8810 | 1017 | } |
b063d9f0 | 1018 | |
98403001 | 1019 | set_upcall_pids(dpif_); |
17411ecf | 1020 | |
b063d9f0 | 1021 | return 0; |
96fba48f BP |
1022 | } |
1023 | ||
aae51f53 BP |
1024 | static int |
1025 | dpif_linux_queue_to_priority(const struct dpif *dpif OVS_UNUSED, | |
1026 | uint32_t queue_id, uint32_t *priority) | |
1027 | { | |
1028 | if (queue_id < 0xf000) { | |
17ee3c1f | 1029 | *priority = TC_H_MAKE(1 << 16, queue_id + 1); |
aae51f53 BP |
1030 | return 0; |
1031 | } else { | |
1032 | return EINVAL; | |
1033 | } | |
1034 | } | |
1035 | ||
96fba48f | 1036 | static int |
982b8810 | 1037 | parse_odp_packet(struct ofpbuf *buf, struct dpif_upcall *upcall, |
254f2dc8 | 1038 | int *dp_ifindex) |
856081f6 | 1039 | { |
df2c07f4 | 1040 | static const struct nl_policy ovs_packet_policy[] = { |
856081f6 | 1041 | /* Always present. */ |
df2c07f4 | 1042 | [OVS_PACKET_ATTR_PACKET] = { .type = NL_A_UNSPEC, |
856081f6 | 1043 | .min_len = ETH_HEADER_LEN }, |
df2c07f4 | 1044 | [OVS_PACKET_ATTR_KEY] = { .type = NL_A_NESTED }, |
856081f6 | 1045 | |
df2c07f4 JP |
1046 | /* OVS_PACKET_CMD_ACTION only. */ |
1047 | [OVS_PACKET_ATTR_USERDATA] = { .type = NL_A_U64, .optional = true }, | |
856081f6 BP |
1048 | }; |
1049 | ||
df2c07f4 JP |
1050 | struct ovs_header *ovs_header; |
1051 | struct nlattr *a[ARRAY_SIZE(ovs_packet_policy)]; | |
982b8810 BP |
1052 | struct nlmsghdr *nlmsg; |
1053 | struct genlmsghdr *genl; | |
1054 | struct ofpbuf b; | |
aaff4b55 | 1055 | int type; |
982b8810 BP |
1056 | |
1057 | ofpbuf_use_const(&b, buf->data, buf->size); | |
1058 | ||
1059 | nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); | |
1060 | genl = ofpbuf_try_pull(&b, sizeof *genl); | |
df2c07f4 JP |
1061 | ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); |
1062 | if (!nlmsg || !genl || !ovs_header | |
1063 | || nlmsg->nlmsg_type != ovs_packet_family | |
1064 | || !nl_policy_parse(&b, 0, ovs_packet_policy, a, | |
1065 | ARRAY_SIZE(ovs_packet_policy))) { | |
856081f6 BP |
1066 | return EINVAL; |
1067 | } | |
1068 | ||
df2c07f4 JP |
1069 | type = (genl->cmd == OVS_PACKET_CMD_MISS ? DPIF_UC_MISS |
1070 | : genl->cmd == OVS_PACKET_CMD_ACTION ? DPIF_UC_ACTION | |
aaff4b55 BP |
1071 | : -1); |
1072 | if (type < 0) { | |
1073 | return EINVAL; | |
1074 | } | |
82272ede | 1075 | |
aaff4b55 BP |
1076 | memset(upcall, 0, sizeof *upcall); |
1077 | upcall->type = type; | |
856081f6 | 1078 | upcall->packet = buf; |
df2c07f4 JP |
1079 | upcall->packet->data = (void *) nl_attr_get(a[OVS_PACKET_ATTR_PACKET]); |
1080 | upcall->packet->size = nl_attr_get_size(a[OVS_PACKET_ATTR_PACKET]); | |
1081 | upcall->key = (void *) nl_attr_get(a[OVS_PACKET_ATTR_KEY]); | |
1082 | upcall->key_len = nl_attr_get_size(a[OVS_PACKET_ATTR_KEY]); | |
1083 | upcall->userdata = (a[OVS_PACKET_ATTR_USERDATA] | |
1084 | ? nl_attr_get_u64(a[OVS_PACKET_ATTR_USERDATA]) | |
856081f6 | 1085 | : 0); |
df2c07f4 | 1086 | *dp_ifindex = ovs_header->dp_ifindex; |
982b8810 | 1087 | |
856081f6 BP |
1088 | return 0; |
1089 | } | |
1090 | ||
1091 | static int | |
90a7c55e BP |
1092 | dpif_linux_recv(struct dpif *dpif_, struct dpif_upcall *upcall, |
1093 | struct ofpbuf *buf) | |
96fba48f BP |
1094 | { |
1095 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
17411ecf | 1096 | int read_tries = 0; |
96fba48f | 1097 | |
a12b3ead | 1098 | if (dpif->epoll_fd < 0) { |
17411ecf | 1099 | return EAGAIN; |
982b8810 BP |
1100 | } |
1101 | ||
8522ba09 | 1102 | if (!dpif->ready_mask) { |
50f80534 | 1103 | struct epoll_event events[N_UPCALL_SOCKS]; |
8522ba09 BP |
1104 | int retval; |
1105 | int i; | |
f6d1465c | 1106 | |
8522ba09 | 1107 | do { |
50f80534 | 1108 | retval = epoll_wait(dpif->epoll_fd, events, N_UPCALL_SOCKS, 0); |
8522ba09 BP |
1109 | } while (retval < 0 && errno == EINTR); |
1110 | if (retval < 0) { | |
1111 | static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(1, 1); | |
50f80534 | 1112 | VLOG_WARN_RL(&rl, "epoll_wait failed (%s)", strerror(errno)); |
8522ba09 BP |
1113 | } |
1114 | ||
50f80534 BP |
1115 | for (i = 0; i < retval; i++) { |
1116 | dpif->ready_mask |= 1u << events[i].data.u32; | |
8522ba09 | 1117 | } |
8522ba09 BP |
1118 | } |
1119 | ||
50f80534 | 1120 | while (dpif->ready_mask) { |
8522ba09 BP |
1121 | int indx = ffs(dpif->ready_mask) - 1; |
1122 | struct nl_sock *upcall_sock = dpif->upcall_socks[indx]; | |
1123 | ||
1124 | dpif->ready_mask &= ~(1u << indx); | |
17411ecf | 1125 | |
f6d1465c | 1126 | for (;;) { |
8522ba09 | 1127 | int dp_ifindex; |
f6d1465c | 1128 | int error; |
17411ecf | 1129 | |
f6d1465c BP |
1130 | if (++read_tries > 50) { |
1131 | return EAGAIN; | |
1132 | } | |
17411ecf | 1133 | |
72d32ac0 BP |
1134 | error = nl_sock_recv(upcall_sock, buf, false); |
1135 | if (error) { | |
72d32ac0 BP |
1136 | if (error == EAGAIN) { |
1137 | break; | |
1138 | } | |
f6d1465c BP |
1139 | return error; |
1140 | } | |
17411ecf | 1141 | |
f6d1465c | 1142 | error = parse_odp_packet(buf, upcall, &dp_ifindex); |
a12b3ead | 1143 | if (!error && dp_ifindex == dpif->dp_ifindex) { |
f6d1465c BP |
1144 | return 0; |
1145 | } | |
f6d1465c BP |
1146 | if (error) { |
1147 | return error; | |
17411ecf | 1148 | } |
982b8810 | 1149 | } |
50f80534 | 1150 | } |
982b8810 BP |
1151 | |
1152 | return EAGAIN; | |
96fba48f BP |
1153 | } |
1154 | ||
1155 | static void | |
1156 | dpif_linux_recv_wait(struct dpif *dpif_) | |
1157 | { | |
1158 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
17411ecf | 1159 | |
a12b3ead | 1160 | if (dpif->epoll_fd < 0) { |
17411ecf JG |
1161 | return; |
1162 | } | |
1163 | ||
50f80534 | 1164 | poll_fd_wait(dpif->epoll_fd, POLLIN); |
96fba48f BP |
1165 | } |
1166 | ||
1ba530f4 BP |
1167 | static void |
1168 | dpif_linux_recv_purge(struct dpif *dpif_) | |
1169 | { | |
1170 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
17411ecf JG |
1171 | int i; |
1172 | ||
a12b3ead | 1173 | if (dpif->epoll_fd < 0) { |
17411ecf JG |
1174 | return; |
1175 | } | |
1ba530f4 | 1176 | |
17411ecf JG |
1177 | for (i = 0; i < N_UPCALL_SOCKS; i++) { |
1178 | nl_sock_drain(dpif->upcall_socks[i]); | |
1ba530f4 BP |
1179 | } |
1180 | } | |
1181 | ||
96fba48f | 1182 | const struct dpif_class dpif_linux_class = { |
1a6f1e2a | 1183 | "system", |
d3d22744 | 1184 | dpif_linux_enumerate, |
96fba48f BP |
1185 | dpif_linux_open, |
1186 | dpif_linux_close, | |
7dab847a | 1187 | dpif_linux_destroy, |
d8abf60c EJ |
1188 | dpif_linux_run, |
1189 | dpif_linux_wait, | |
96fba48f | 1190 | dpif_linux_get_stats, |
96fba48f BP |
1191 | dpif_linux_port_add, |
1192 | dpif_linux_port_del, | |
1193 | dpif_linux_port_query_by_number, | |
1194 | dpif_linux_port_query_by_name, | |
996c1b3d | 1195 | dpif_linux_get_max_ports, |
98403001 | 1196 | dpif_linux_port_get_pid, |
b0ec0f27 BP |
1197 | dpif_linux_port_dump_start, |
1198 | dpif_linux_port_dump_next, | |
1199 | dpif_linux_port_dump_done, | |
e9e28be3 BP |
1200 | dpif_linux_port_poll, |
1201 | dpif_linux_port_poll_wait, | |
96fba48f BP |
1202 | dpif_linux_flow_get, |
1203 | dpif_linux_flow_put, | |
1204 | dpif_linux_flow_del, | |
1205 | dpif_linux_flow_flush, | |
704a1e09 BP |
1206 | dpif_linux_flow_dump_start, |
1207 | dpif_linux_flow_dump_next, | |
1208 | dpif_linux_flow_dump_done, | |
96fba48f | 1209 | dpif_linux_execute, |
6bc60024 | 1210 | dpif_linux_operate, |
a12b3ead | 1211 | dpif_linux_recv_set, |
aae51f53 | 1212 | dpif_linux_queue_to_priority, |
96fba48f BP |
1213 | dpif_linux_recv, |
1214 | dpif_linux_recv_wait, | |
1ba530f4 | 1215 | dpif_linux_recv_purge, |
96fba48f BP |
1216 | }; |
1217 | \f | |
96fba48f | 1218 | static int |
982b8810 | 1219 | dpif_linux_init(void) |
96fba48f | 1220 | { |
982b8810 BP |
1221 | static int error = -1; |
1222 | ||
1223 | if (error < 0) { | |
c7178a0b EJ |
1224 | unsigned int ovs_vport_mcgroup; |
1225 | ||
df2c07f4 JP |
1226 | error = nl_lookup_genl_family(OVS_DATAPATH_FAMILY, |
1227 | &ovs_datapath_family); | |
37a1300c BP |
1228 | if (error) { |
1229 | VLOG_ERR("Generic Netlink family '%s' does not exist. " | |
1230 | "The Open vSwitch kernel module is probably not loaded.", | |
df2c07f4 | 1231 | OVS_DATAPATH_FAMILY); |
37a1300c | 1232 | } |
f0fef760 | 1233 | if (!error) { |
df2c07f4 | 1234 | error = nl_lookup_genl_family(OVS_VPORT_FAMILY, &ovs_vport_family); |
f0fef760 | 1235 | } |
37a1300c | 1236 | if (!error) { |
df2c07f4 | 1237 | error = nl_lookup_genl_family(OVS_FLOW_FAMILY, &ovs_flow_family); |
37a1300c | 1238 | } |
aaff4b55 | 1239 | if (!error) { |
df2c07f4 JP |
1240 | error = nl_lookup_genl_family(OVS_PACKET_FAMILY, |
1241 | &ovs_packet_family); | |
aaff4b55 | 1242 | } |
982b8810 BP |
1243 | if (!error) { |
1244 | error = nl_sock_create(NETLINK_GENERIC, &genl_sock); | |
1245 | } | |
c7178a0b EJ |
1246 | if (!error) { |
1247 | error = nl_lookup_genl_mcgroup(OVS_VPORT_FAMILY, OVS_VPORT_MCGROUP, | |
213a13ed EJ |
1248 | &ovs_vport_mcgroup, |
1249 | OVS_VPORT_MCGROUP_FALLBACK_ID); | |
c7178a0b EJ |
1250 | } |
1251 | if (!error) { | |
1252 | static struct dpif_linux_vport vport; | |
1253 | nln = nln_create(NETLINK_GENERIC, ovs_vport_mcgroup, | |
1254 | dpif_linux_nln_parse, &vport); | |
1255 | } | |
982b8810 BP |
1256 | } |
1257 | ||
1258 | return error; | |
96fba48f BP |
1259 | } |
1260 | ||
c19e6535 BP |
1261 | bool |
1262 | dpif_linux_is_internal_device(const char *name) | |
9fe3b9a2 | 1263 | { |
c19e6535 BP |
1264 | struct dpif_linux_vport reply; |
1265 | struct ofpbuf *buf; | |
9fe3b9a2 | 1266 | int error; |
96fba48f | 1267 | |
c19e6535 BP |
1268 | error = dpif_linux_vport_get(name, &reply, &buf); |
1269 | if (!error) { | |
1270 | ofpbuf_delete(buf); | |
141d9ce4 | 1271 | } else if (error != ENODEV && error != ENOENT) { |
c19e6535 BP |
1272 | VLOG_WARN_RL(&error_rl, "%s: vport query failed (%s)", |
1273 | name, strerror(error)); | |
96fba48f BP |
1274 | } |
1275 | ||
df2c07f4 | 1276 | return reply.type == OVS_VPORT_TYPE_INTERNAL; |
96fba48f BP |
1277 | } |
1278 | ||
7feba1ac BP |
1279 | int |
1280 | dpif_linux_vport_send(int dp_ifindex, uint32_t port_no, | |
1281 | const void *data, size_t size) | |
1282 | { | |
eb8b28e7 EJ |
1283 | struct ofpbuf actions, key, packet; |
1284 | struct odputil_keybuf keybuf; | |
89625d1e | 1285 | struct dpif_execute execute; |
eb8b28e7 EJ |
1286 | struct flow flow; |
1287 | uint64_t action; | |
7feba1ac | 1288 | |
eb8b28e7 | 1289 | ofpbuf_use_const(&packet, data, size); |
abff858b | 1290 | flow_extract(&packet, 0, htonll(0), 0, &flow); |
7feba1ac | 1291 | |
eb8b28e7 EJ |
1292 | ofpbuf_use_stack(&key, &keybuf, sizeof keybuf); |
1293 | odp_flow_key_from_flow(&key, &flow); | |
7feba1ac | 1294 | |
eb8b28e7 | 1295 | ofpbuf_use_stack(&actions, &action, sizeof action); |
df2c07f4 | 1296 | nl_msg_put_u32(&actions, OVS_ACTION_ATTR_OUTPUT, port_no); |
7feba1ac | 1297 | |
89625d1e BP |
1298 | execute.key = key.data; |
1299 | execute.key_len = key.size; | |
1300 | execute.actions = actions.data; | |
1301 | execute.actions_len = actions.size; | |
1302 | execute.packet = &packet; | |
1303 | return dpif_linux_execute__(dp_ifindex, &execute); | |
7feba1ac BP |
1304 | } |
1305 | ||
c7178a0b EJ |
1306 | static bool |
1307 | dpif_linux_nln_parse(struct ofpbuf *buf, void *vport_) | |
1308 | { | |
1309 | struct dpif_linux_vport *vport = vport_; | |
1310 | return dpif_linux_vport_from_ofpbuf(vport, buf) == 0; | |
1311 | } | |
1312 | ||
e9e28be3 | 1313 | static void |
c7178a0b | 1314 | dpif_linux_port_changed(const void *vport_, void *dpif_) |
e9e28be3 | 1315 | { |
c7178a0b | 1316 | const struct dpif_linux_vport *vport = vport_; |
e9e28be3 BP |
1317 | struct dpif_linux *dpif = dpif_; |
1318 | ||
c7178a0b EJ |
1319 | if (vport) { |
1320 | if (vport->dp_ifindex == dpif->dp_ifindex | |
1321 | && (vport->cmd == OVS_VPORT_CMD_NEW | |
1322 | || vport->cmd == OVS_VPORT_CMD_DEL | |
1323 | || vport->cmd == OVS_VPORT_CMD_SET)) { | |
1324 | VLOG_DBG("port_changed: dpif:%s vport:%s cmd:%"PRIu8, | |
1325 | dpif->dpif.full_name, vport->name, vport->cmd); | |
1326 | sset_add(&dpif->changed_ports, vport->name); | |
e9e28be3 | 1327 | } |
8b61709d BP |
1328 | } else { |
1329 | dpif->change_error = true; | |
e9e28be3 BP |
1330 | } |
1331 | } | |
c19e6535 | 1332 | \f |
df2c07f4 | 1333 | /* Parses the contents of 'buf', which contains a "struct ovs_header" followed |
c19e6535 BP |
1334 | * by Netlink attributes, into 'vport'. Returns 0 if successful, otherwise a |
1335 | * positive errno value. | |
1336 | * | |
1337 | * 'vport' will contain pointers into 'buf', so the caller should not free | |
1338 | * 'buf' while 'vport' is still in use. */ | |
1339 | static int | |
1340 | dpif_linux_vport_from_ofpbuf(struct dpif_linux_vport *vport, | |
1341 | const struct ofpbuf *buf) | |
1342 | { | |
df2c07f4 JP |
1343 | static const struct nl_policy ovs_vport_policy[] = { |
1344 | [OVS_VPORT_ATTR_PORT_NO] = { .type = NL_A_U32 }, | |
1345 | [OVS_VPORT_ATTR_TYPE] = { .type = NL_A_U32 }, | |
1346 | [OVS_VPORT_ATTR_NAME] = { .type = NL_A_STRING, .max_len = IFNAMSIZ }, | |
b063d9f0 | 1347 | [OVS_VPORT_ATTR_UPCALL_PID] = { .type = NL_A_U32 }, |
f7df9823 | 1348 | [OVS_VPORT_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_vport_stats), |
c19e6535 | 1349 | .optional = true }, |
df2c07f4 | 1350 | [OVS_VPORT_ATTR_ADDRESS] = { .type = NL_A_UNSPEC, |
c19e6535 BP |
1351 | .min_len = ETH_ADDR_LEN, |
1352 | .max_len = ETH_ADDR_LEN, | |
1353 | .optional = true }, | |
df2c07f4 | 1354 | [OVS_VPORT_ATTR_OPTIONS] = { .type = NL_A_NESTED, .optional = true }, |
c19e6535 BP |
1355 | }; |
1356 | ||
df2c07f4 JP |
1357 | struct nlattr *a[ARRAY_SIZE(ovs_vport_policy)]; |
1358 | struct ovs_header *ovs_header; | |
f0fef760 BP |
1359 | struct nlmsghdr *nlmsg; |
1360 | struct genlmsghdr *genl; | |
1361 | struct ofpbuf b; | |
c19e6535 BP |
1362 | |
1363 | dpif_linux_vport_init(vport); | |
1364 | ||
f0fef760 BP |
1365 | ofpbuf_use_const(&b, buf->data, buf->size); |
1366 | nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); | |
1367 | genl = ofpbuf_try_pull(&b, sizeof *genl); | |
df2c07f4 JP |
1368 | ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); |
1369 | if (!nlmsg || !genl || !ovs_header | |
1370 | || nlmsg->nlmsg_type != ovs_vport_family | |
1371 | || !nl_policy_parse(&b, 0, ovs_vport_policy, a, | |
1372 | ARRAY_SIZE(ovs_vport_policy))) { | |
c19e6535 BP |
1373 | return EINVAL; |
1374 | } | |
c19e6535 | 1375 | |
f0fef760 | 1376 | vport->cmd = genl->cmd; |
df2c07f4 JP |
1377 | vport->dp_ifindex = ovs_header->dp_ifindex; |
1378 | vport->port_no = nl_attr_get_u32(a[OVS_VPORT_ATTR_PORT_NO]); | |
1379 | vport->type = nl_attr_get_u32(a[OVS_VPORT_ATTR_TYPE]); | |
1380 | vport->name = nl_attr_get_string(a[OVS_VPORT_ATTR_NAME]); | |
b063d9f0 | 1381 | if (a[OVS_VPORT_ATTR_UPCALL_PID]) { |
a24a6574 | 1382 | vport->upcall_pid = nl_attr_get(a[OVS_VPORT_ATTR_UPCALL_PID]); |
b063d9f0 | 1383 | } |
df2c07f4 JP |
1384 | if (a[OVS_VPORT_ATTR_STATS]) { |
1385 | vport->stats = nl_attr_get(a[OVS_VPORT_ATTR_STATS]); | |
1386 | } | |
1387 | if (a[OVS_VPORT_ATTR_ADDRESS]) { | |
1388 | vport->address = nl_attr_get(a[OVS_VPORT_ATTR_ADDRESS]); | |
1389 | } | |
df2c07f4 JP |
1390 | if (a[OVS_VPORT_ATTR_OPTIONS]) { |
1391 | vport->options = nl_attr_get(a[OVS_VPORT_ATTR_OPTIONS]); | |
1392 | vport->options_len = nl_attr_get_size(a[OVS_VPORT_ATTR_OPTIONS]); | |
c19e6535 | 1393 | } |
c19e6535 BP |
1394 | return 0; |
1395 | } | |
1396 | ||
df2c07f4 | 1397 | /* Appends to 'buf' (which must initially be empty) a "struct ovs_header" |
c19e6535 BP |
1398 | * followed by Netlink attributes corresponding to 'vport'. */ |
1399 | static void | |
1400 | dpif_linux_vport_to_ofpbuf(const struct dpif_linux_vport *vport, | |
1401 | struct ofpbuf *buf) | |
1402 | { | |
df2c07f4 | 1403 | struct ovs_header *ovs_header; |
f0fef760 | 1404 | |
df2c07f4 | 1405 | nl_msg_put_genlmsghdr(buf, 0, ovs_vport_family, NLM_F_REQUEST | NLM_F_ECHO, |
69685a88 | 1406 | vport->cmd, OVS_VPORT_VERSION); |
c19e6535 | 1407 | |
df2c07f4 JP |
1408 | ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header); |
1409 | ovs_header->dp_ifindex = vport->dp_ifindex; | |
c19e6535 BP |
1410 | |
1411 | if (vport->port_no != UINT32_MAX) { | |
df2c07f4 | 1412 | nl_msg_put_u32(buf, OVS_VPORT_ATTR_PORT_NO, vport->port_no); |
c19e6535 BP |
1413 | } |
1414 | ||
df2c07f4 JP |
1415 | if (vport->type != OVS_VPORT_TYPE_UNSPEC) { |
1416 | nl_msg_put_u32(buf, OVS_VPORT_ATTR_TYPE, vport->type); | |
c19e6535 BP |
1417 | } |
1418 | ||
1419 | if (vport->name) { | |
df2c07f4 | 1420 | nl_msg_put_string(buf, OVS_VPORT_ATTR_NAME, vport->name); |
c19e6535 BP |
1421 | } |
1422 | ||
a24a6574 BP |
1423 | if (vport->upcall_pid) { |
1424 | nl_msg_put_u32(buf, OVS_VPORT_ATTR_UPCALL_PID, *vport->upcall_pid); | |
1425 | } | |
b063d9f0 | 1426 | |
c19e6535 | 1427 | if (vport->stats) { |
df2c07f4 | 1428 | nl_msg_put_unspec(buf, OVS_VPORT_ATTR_STATS, |
c19e6535 BP |
1429 | vport->stats, sizeof *vport->stats); |
1430 | } | |
1431 | ||
1432 | if (vport->address) { | |
df2c07f4 | 1433 | nl_msg_put_unspec(buf, OVS_VPORT_ATTR_ADDRESS, |
c19e6535 BP |
1434 | vport->address, ETH_ADDR_LEN); |
1435 | } | |
1436 | ||
c19e6535 | 1437 | if (vport->options) { |
df2c07f4 | 1438 | nl_msg_put_nested(buf, OVS_VPORT_ATTR_OPTIONS, |
c19e6535 BP |
1439 | vport->options, vport->options_len); |
1440 | } | |
c19e6535 BP |
1441 | } |
1442 | ||
1443 | /* Clears 'vport' to "empty" values. */ | |
1444 | void | |
1445 | dpif_linux_vport_init(struct dpif_linux_vport *vport) | |
1446 | { | |
1447 | memset(vport, 0, sizeof *vport); | |
c19e6535 BP |
1448 | vport->port_no = UINT32_MAX; |
1449 | } | |
1450 | ||
1451 | /* Executes 'request' in the kernel datapath. If the command fails, returns a | |
1452 | * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0 | |
1453 | * without doing anything else. If 'reply' and 'bufp' are nonnull, then the | |
df2c07f4 | 1454 | * result of the command is expected to be an ovs_vport also, which is decoded |
c19e6535 BP |
1455 | * and stored in '*reply' and '*bufp'. The caller must free '*bufp' when the |
1456 | * reply is no longer needed ('reply' will contain pointers into '*bufp'). */ | |
1457 | int | |
1458 | dpif_linux_vport_transact(const struct dpif_linux_vport *request, | |
1459 | struct dpif_linux_vport *reply, | |
1460 | struct ofpbuf **bufp) | |
1461 | { | |
f0fef760 | 1462 | struct ofpbuf *request_buf; |
c19e6535 BP |
1463 | int error; |
1464 | ||
1465 | assert((reply != NULL) == (bufp != NULL)); | |
c19e6535 | 1466 | |
42bb6c72 BP |
1467 | error = dpif_linux_init(); |
1468 | if (error) { | |
1469 | if (reply) { | |
1470 | *bufp = NULL; | |
1471 | dpif_linux_vport_init(reply); | |
1472 | } | |
1473 | return error; | |
1474 | } | |
1475 | ||
f0fef760 BP |
1476 | request_buf = ofpbuf_new(1024); |
1477 | dpif_linux_vport_to_ofpbuf(request, request_buf); | |
1478 | error = nl_sock_transact(genl_sock, request_buf, bufp); | |
1479 | ofpbuf_delete(request_buf); | |
c19e6535 | 1480 | |
f0fef760 BP |
1481 | if (reply) { |
1482 | if (!error) { | |
1483 | error = dpif_linux_vport_from_ofpbuf(reply, *bufp); | |
1484 | } | |
c19e6535 | 1485 | if (error) { |
f0fef760 BP |
1486 | dpif_linux_vport_init(reply); |
1487 | ofpbuf_delete(*bufp); | |
1488 | *bufp = NULL; | |
c19e6535 | 1489 | } |
c19e6535 BP |
1490 | } |
1491 | return error; | |
1492 | } | |
1493 | ||
1494 | /* Obtains information about the kernel vport named 'name' and stores it into | |
1495 | * '*reply' and '*bufp'. The caller must free '*bufp' when the reply is no | |
1496 | * longer needed ('reply' will contain pointers into '*bufp'). */ | |
1497 | int | |
1498 | dpif_linux_vport_get(const char *name, struct dpif_linux_vport *reply, | |
1499 | struct ofpbuf **bufp) | |
1500 | { | |
1501 | struct dpif_linux_vport request; | |
1502 | ||
1503 | dpif_linux_vport_init(&request); | |
df2c07f4 | 1504 | request.cmd = OVS_VPORT_CMD_GET; |
c19e6535 BP |
1505 | request.name = name; |
1506 | ||
1507 | return dpif_linux_vport_transact(&request, reply, bufp); | |
1508 | } | |
d6569377 | 1509 | \f |
df2c07f4 | 1510 | /* Parses the contents of 'buf', which contains a "struct ovs_header" followed |
aaff4b55 BP |
1511 | * by Netlink attributes, into 'dp'. Returns 0 if successful, otherwise a |
1512 | * positive errno value. | |
d6569377 BP |
1513 | * |
1514 | * 'dp' will contain pointers into 'buf', so the caller should not free 'buf' | |
1515 | * while 'dp' is still in use. */ | |
1516 | static int | |
1517 | dpif_linux_dp_from_ofpbuf(struct dpif_linux_dp *dp, const struct ofpbuf *buf) | |
1518 | { | |
df2c07f4 JP |
1519 | static const struct nl_policy ovs_datapath_policy[] = { |
1520 | [OVS_DP_ATTR_NAME] = { .type = NL_A_STRING, .max_len = IFNAMSIZ }, | |
f7df9823 | 1521 | [OVS_DP_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_dp_stats), |
d6569377 | 1522 | .optional = true }, |
d6569377 BP |
1523 | }; |
1524 | ||
df2c07f4 JP |
1525 | struct nlattr *a[ARRAY_SIZE(ovs_datapath_policy)]; |
1526 | struct ovs_header *ovs_header; | |
aaff4b55 BP |
1527 | struct nlmsghdr *nlmsg; |
1528 | struct genlmsghdr *genl; | |
1529 | struct ofpbuf b; | |
d6569377 BP |
1530 | |
1531 | dpif_linux_dp_init(dp); | |
1532 | ||
aaff4b55 BP |
1533 | ofpbuf_use_const(&b, buf->data, buf->size); |
1534 | nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); | |
1535 | genl = ofpbuf_try_pull(&b, sizeof *genl); | |
df2c07f4 JP |
1536 | ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); |
1537 | if (!nlmsg || !genl || !ovs_header | |
1538 | || nlmsg->nlmsg_type != ovs_datapath_family | |
1539 | || !nl_policy_parse(&b, 0, ovs_datapath_policy, a, | |
1540 | ARRAY_SIZE(ovs_datapath_policy))) { | |
d6569377 BP |
1541 | return EINVAL; |
1542 | } | |
d6569377 | 1543 | |
aaff4b55 | 1544 | dp->cmd = genl->cmd; |
df2c07f4 JP |
1545 | dp->dp_ifindex = ovs_header->dp_ifindex; |
1546 | dp->name = nl_attr_get_string(a[OVS_DP_ATTR_NAME]); | |
1547 | if (a[OVS_DP_ATTR_STATS]) { | |
d6569377 BP |
1548 | /* Can't use structure assignment because Netlink doesn't ensure |
1549 | * sufficient alignment for 64-bit members. */ | |
df2c07f4 | 1550 | memcpy(&dp->stats, nl_attr_get(a[OVS_DP_ATTR_STATS]), |
d6569377 BP |
1551 | sizeof dp->stats); |
1552 | } | |
982b8810 | 1553 | |
d6569377 BP |
1554 | return 0; |
1555 | } | |
1556 | ||
aaff4b55 | 1557 | /* Appends to 'buf' the Generic Netlink message described by 'dp'. */ |
d6569377 BP |
1558 | static void |
1559 | dpif_linux_dp_to_ofpbuf(const struct dpif_linux_dp *dp, struct ofpbuf *buf) | |
1560 | { | |
df2c07f4 | 1561 | struct ovs_header *ovs_header; |
d6569377 | 1562 | |
df2c07f4 | 1563 | nl_msg_put_genlmsghdr(buf, 0, ovs_datapath_family, |
69685a88 JG |
1564 | NLM_F_REQUEST | NLM_F_ECHO, dp->cmd, |
1565 | OVS_DATAPATH_VERSION); | |
aaff4b55 | 1566 | |
df2c07f4 JP |
1567 | ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header); |
1568 | ovs_header->dp_ifindex = dp->dp_ifindex; | |
d6569377 BP |
1569 | |
1570 | if (dp->name) { | |
df2c07f4 | 1571 | nl_msg_put_string(buf, OVS_DP_ATTR_NAME, dp->name); |
d6569377 BP |
1572 | } |
1573 | ||
a24a6574 BP |
1574 | if (dp->upcall_pid) { |
1575 | nl_msg_put_u32(buf, OVS_DP_ATTR_UPCALL_PID, *dp->upcall_pid); | |
1576 | } | |
b063d9f0 | 1577 | |
df2c07f4 | 1578 | /* Skip OVS_DP_ATTR_STATS since we never have a reason to serialize it. */ |
d6569377 BP |
1579 | } |
1580 | ||
1581 | /* Clears 'dp' to "empty" values. */ | |
d3d8f1f7 | 1582 | static void |
d6569377 BP |
1583 | dpif_linux_dp_init(struct dpif_linux_dp *dp) |
1584 | { | |
1585 | memset(dp, 0, sizeof *dp); | |
d6569377 BP |
1586 | } |
1587 | ||
aaff4b55 BP |
1588 | static void |
1589 | dpif_linux_dp_dump_start(struct nl_dump *dump) | |
1590 | { | |
1591 | struct dpif_linux_dp request; | |
1592 | struct ofpbuf *buf; | |
1593 | ||
1594 | dpif_linux_dp_init(&request); | |
df2c07f4 | 1595 | request.cmd = OVS_DP_CMD_GET; |
aaff4b55 BP |
1596 | |
1597 | buf = ofpbuf_new(1024); | |
1598 | dpif_linux_dp_to_ofpbuf(&request, buf); | |
1599 | nl_dump_start(dump, genl_sock, buf); | |
1600 | ofpbuf_delete(buf); | |
1601 | } | |
1602 | ||
d6569377 BP |
1603 | /* Executes 'request' in the kernel datapath. If the command fails, returns a |
1604 | * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0 | |
1605 | * without doing anything else. If 'reply' and 'bufp' are nonnull, then the | |
aaff4b55 BP |
1606 | * result of the command is expected to be of the same form, which is decoded |
1607 | * and stored in '*reply' and '*bufp'. The caller must free '*bufp' when the | |
1608 | * reply is no longer needed ('reply' will contain pointers into '*bufp'). */ | |
d3d8f1f7 | 1609 | static int |
d6569377 BP |
1610 | dpif_linux_dp_transact(const struct dpif_linux_dp *request, |
1611 | struct dpif_linux_dp *reply, struct ofpbuf **bufp) | |
1612 | { | |
aaff4b55 | 1613 | struct ofpbuf *request_buf; |
d6569377 | 1614 | int error; |
d6569377 BP |
1615 | |
1616 | assert((reply != NULL) == (bufp != NULL)); | |
1617 | ||
aaff4b55 BP |
1618 | request_buf = ofpbuf_new(1024); |
1619 | dpif_linux_dp_to_ofpbuf(request, request_buf); | |
1620 | error = nl_sock_transact(genl_sock, request_buf, bufp); | |
1621 | ofpbuf_delete(request_buf); | |
d6569377 | 1622 | |
aaff4b55 BP |
1623 | if (reply) { |
1624 | if (!error) { | |
1625 | error = dpif_linux_dp_from_ofpbuf(reply, *bufp); | |
1626 | } | |
d6569377 | 1627 | if (error) { |
aaff4b55 BP |
1628 | dpif_linux_dp_init(reply); |
1629 | ofpbuf_delete(*bufp); | |
1630 | *bufp = NULL; | |
d6569377 | 1631 | } |
d6569377 BP |
1632 | } |
1633 | return error; | |
1634 | } | |
1635 | ||
1636 | /* Obtains information about 'dpif_' and stores it into '*reply' and '*bufp'. | |
1637 | * The caller must free '*bufp' when the reply is no longer needed ('reply' | |
1638 | * will contain pointers into '*bufp'). */ | |
d3d8f1f7 | 1639 | static int |
d6569377 BP |
1640 | dpif_linux_dp_get(const struct dpif *dpif_, struct dpif_linux_dp *reply, |
1641 | struct ofpbuf **bufp) | |
1642 | { | |
1643 | struct dpif_linux *dpif = dpif_linux_cast(dpif_); | |
1644 | struct dpif_linux_dp request; | |
1645 | ||
1646 | dpif_linux_dp_init(&request); | |
df2c07f4 | 1647 | request.cmd = OVS_DP_CMD_GET; |
254f2dc8 | 1648 | request.dp_ifindex = dpif->dp_ifindex; |
d6569377 BP |
1649 | |
1650 | return dpif_linux_dp_transact(&request, reply, bufp); | |
1651 | } | |
1652 | \f | |
df2c07f4 | 1653 | /* Parses the contents of 'buf', which contains a "struct ovs_header" followed |
37a1300c | 1654 | * by Netlink attributes, into 'flow'. Returns 0 if successful, otherwise a |
d6569377 BP |
1655 | * positive errno value. |
1656 | * | |
1657 | * 'flow' will contain pointers into 'buf', so the caller should not free 'buf' | |
1658 | * while 'flow' is still in use. */ | |
1659 | static int | |
1660 | dpif_linux_flow_from_ofpbuf(struct dpif_linux_flow *flow, | |
1661 | const struct ofpbuf *buf) | |
1662 | { | |
df2c07f4 JP |
1663 | static const struct nl_policy ovs_flow_policy[] = { |
1664 | [OVS_FLOW_ATTR_KEY] = { .type = NL_A_NESTED }, | |
1665 | [OVS_FLOW_ATTR_ACTIONS] = { .type = NL_A_NESTED, .optional = true }, | |
f7df9823 | 1666 | [OVS_FLOW_ATTR_STATS] = { NL_POLICY_FOR(struct ovs_flow_stats), |
d6569377 | 1667 | .optional = true }, |
df2c07f4 JP |
1668 | [OVS_FLOW_ATTR_TCP_FLAGS] = { .type = NL_A_U8, .optional = true }, |
1669 | [OVS_FLOW_ATTR_USED] = { .type = NL_A_U64, .optional = true }, | |
1670 | /* The kernel never uses OVS_FLOW_ATTR_CLEAR. */ | |
d6569377 BP |
1671 | }; |
1672 | ||
df2c07f4 JP |
1673 | struct nlattr *a[ARRAY_SIZE(ovs_flow_policy)]; |
1674 | struct ovs_header *ovs_header; | |
37a1300c BP |
1675 | struct nlmsghdr *nlmsg; |
1676 | struct genlmsghdr *genl; | |
1677 | struct ofpbuf b; | |
d6569377 BP |
1678 | |
1679 | dpif_linux_flow_init(flow); | |
1680 | ||
37a1300c BP |
1681 | ofpbuf_use_const(&b, buf->data, buf->size); |
1682 | nlmsg = ofpbuf_try_pull(&b, sizeof *nlmsg); | |
1683 | genl = ofpbuf_try_pull(&b, sizeof *genl); | |
df2c07f4 JP |
1684 | ovs_header = ofpbuf_try_pull(&b, sizeof *ovs_header); |
1685 | if (!nlmsg || !genl || !ovs_header | |
1686 | || nlmsg->nlmsg_type != ovs_flow_family | |
1687 | || !nl_policy_parse(&b, 0, ovs_flow_policy, a, | |
1688 | ARRAY_SIZE(ovs_flow_policy))) { | |
d6569377 BP |
1689 | return EINVAL; |
1690 | } | |
d6569377 | 1691 | |
37a1300c | 1692 | flow->nlmsg_flags = nlmsg->nlmsg_flags; |
df2c07f4 JP |
1693 | flow->dp_ifindex = ovs_header->dp_ifindex; |
1694 | flow->key = nl_attr_get(a[OVS_FLOW_ATTR_KEY]); | |
1695 | flow->key_len = nl_attr_get_size(a[OVS_FLOW_ATTR_KEY]); | |
1696 | if (a[OVS_FLOW_ATTR_ACTIONS]) { | |
1697 | flow->actions = nl_attr_get(a[OVS_FLOW_ATTR_ACTIONS]); | |
1698 | flow->actions_len = nl_attr_get_size(a[OVS_FLOW_ATTR_ACTIONS]); | |
d6569377 | 1699 | } |
df2c07f4 JP |
1700 | if (a[OVS_FLOW_ATTR_STATS]) { |
1701 | flow->stats = nl_attr_get(a[OVS_FLOW_ATTR_STATS]); | |
d6569377 | 1702 | } |
df2c07f4 JP |
1703 | if (a[OVS_FLOW_ATTR_TCP_FLAGS]) { |
1704 | flow->tcp_flags = nl_attr_get(a[OVS_FLOW_ATTR_TCP_FLAGS]); | |
d6569377 | 1705 | } |
df2c07f4 JP |
1706 | if (a[OVS_FLOW_ATTR_USED]) { |
1707 | flow->used = nl_attr_get(a[OVS_FLOW_ATTR_USED]); | |
9e980142 | 1708 | } |
d6569377 BP |
1709 | return 0; |
1710 | } | |
1711 | ||
df2c07f4 | 1712 | /* Appends to 'buf' (which must initially be empty) a "struct ovs_header" |
d6569377 BP |
1713 | * followed by Netlink attributes corresponding to 'flow'. */ |
1714 | static void | |
1715 | dpif_linux_flow_to_ofpbuf(const struct dpif_linux_flow *flow, | |
1716 | struct ofpbuf *buf) | |
1717 | { | |
df2c07f4 | 1718 | struct ovs_header *ovs_header; |
d6569377 | 1719 | |
df2c07f4 | 1720 | nl_msg_put_genlmsghdr(buf, 0, ovs_flow_family, |
30b44744 | 1721 | NLM_F_REQUEST | flow->nlmsg_flags, |
69685a88 | 1722 | flow->cmd, OVS_FLOW_VERSION); |
37a1300c | 1723 | |
df2c07f4 JP |
1724 | ovs_header = ofpbuf_put_uninit(buf, sizeof *ovs_header); |
1725 | ovs_header->dp_ifindex = flow->dp_ifindex; | |
d6569377 BP |
1726 | |
1727 | if (flow->key_len) { | |
df2c07f4 | 1728 | nl_msg_put_unspec(buf, OVS_FLOW_ATTR_KEY, flow->key, flow->key_len); |
d6569377 BP |
1729 | } |
1730 | ||
d2a23af2 | 1731 | if (flow->actions || flow->actions_len) { |
df2c07f4 | 1732 | nl_msg_put_unspec(buf, OVS_FLOW_ATTR_ACTIONS, |
d6569377 BP |
1733 | flow->actions, flow->actions_len); |
1734 | } | |
1735 | ||
1736 | /* We never need to send these to the kernel. */ | |
1737 | assert(!flow->stats); | |
1738 | assert(!flow->tcp_flags); | |
1739 | assert(!flow->used); | |
1740 | ||
1741 | if (flow->clear) { | |
df2c07f4 | 1742 | nl_msg_put_flag(buf, OVS_FLOW_ATTR_CLEAR); |
d6569377 | 1743 | } |
d6569377 BP |
1744 | } |
1745 | ||
1746 | /* Clears 'flow' to "empty" values. */ | |
d3d8f1f7 | 1747 | static void |
d6569377 BP |
1748 | dpif_linux_flow_init(struct dpif_linux_flow *flow) |
1749 | { | |
1750 | memset(flow, 0, sizeof *flow); | |
1751 | } | |
1752 | ||
1753 | /* Executes 'request' in the kernel datapath. If the command fails, returns a | |
1754 | * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0 | |
1755 | * without doing anything else. If 'reply' and 'bufp' are nonnull, then the | |
37a1300c BP |
1756 | * result of the command is expected to be a flow also, which is decoded and |
1757 | * stored in '*reply' and '*bufp'. The caller must free '*bufp' when the reply | |
1758 | * is no longer needed ('reply' will contain pointers into '*bufp'). */ | |
d3d8f1f7 | 1759 | static int |
30b44744 | 1760 | dpif_linux_flow_transact(struct dpif_linux_flow *request, |
d6569377 BP |
1761 | struct dpif_linux_flow *reply, struct ofpbuf **bufp) |
1762 | { | |
37a1300c | 1763 | struct ofpbuf *request_buf; |
d6569377 | 1764 | int error; |
d6569377 BP |
1765 | |
1766 | assert((reply != NULL) == (bufp != NULL)); | |
1767 | ||
30b44744 BP |
1768 | if (reply) { |
1769 | request->nlmsg_flags |= NLM_F_ECHO; | |
1770 | } | |
1771 | ||
37a1300c BP |
1772 | request_buf = ofpbuf_new(1024); |
1773 | dpif_linux_flow_to_ofpbuf(request, request_buf); | |
1774 | error = nl_sock_transact(genl_sock, request_buf, bufp); | |
1775 | ofpbuf_delete(request_buf); | |
d6569377 | 1776 | |
37a1300c BP |
1777 | if (reply) { |
1778 | if (!error) { | |
1779 | error = dpif_linux_flow_from_ofpbuf(reply, *bufp); | |
1780 | } | |
d6569377 | 1781 | if (error) { |
37a1300c BP |
1782 | dpif_linux_flow_init(reply); |
1783 | ofpbuf_delete(*bufp); | |
1784 | *bufp = NULL; | |
d6569377 | 1785 | } |
d6569377 BP |
1786 | } |
1787 | return error; | |
1788 | } | |
1789 | ||
1790 | static void | |
1791 | dpif_linux_flow_get_stats(const struct dpif_linux_flow *flow, | |
1792 | struct dpif_flow_stats *stats) | |
1793 | { | |
1794 | if (flow->stats) { | |
1795 | stats->n_packets = get_unaligned_u64(&flow->stats->n_packets); | |
1796 | stats->n_bytes = get_unaligned_u64(&flow->stats->n_bytes); | |
1797 | } else { | |
1798 | stats->n_packets = 0; | |
1799 | stats->n_bytes = 0; | |
1800 | } | |
0e70cdcb | 1801 | stats->used = flow->used ? get_32aligned_u64(flow->used) : 0; |
d6569377 BP |
1802 | stats->tcp_flags = flow->tcp_flags ? *flow->tcp_flags : 0; |
1803 | } |