2 * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013 Nicira, Inc.
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:
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 #include "dpif-linux.h"
26 #include <linux/types.h>
27 #include <linux/pkt_sched.h>
28 #include <linux/rtnetlink.h>
29 #include <linux/sockios.h>
33 #include <sys/epoll.h>
38 #include "dpif-provider.h"
39 #include "dynamic-string.h"
42 #include "netdev-linux.h"
43 #include "netdev-vport.h"
44 #include "netlink-notifier.h"
45 #include "netlink-socket.h"
49 #include "openvswitch/datapath-compat.h"
51 #include "poll-loop.h"
56 #include "unaligned.h"
60 VLOG_DEFINE_THIS_MODULE(dpif_linux
);
61 enum { MAX_PORTS
= USHRT_MAX
};
63 /* This ethtool flag was introduced in Linux 2.6.24, so it might be
64 * missing if we have old headers. */
65 #define ETH_FLAG_LRO (1 << 15) /* LRO is enabled */
67 struct dpif_linux_dp
{
68 /* Generic Netlink header. */
71 /* struct ovs_header. */
75 const char *name
; /* OVS_DP_ATTR_NAME. */
76 const uint32_t *upcall_pid
; /* OVS_DP_UPCALL_PID. */
77 struct ovs_dp_stats stats
; /* OVS_DP_ATTR_STATS. */
80 static void dpif_linux_dp_init(struct dpif_linux_dp
*);
81 static int dpif_linux_dp_from_ofpbuf(struct dpif_linux_dp
*,
82 const struct ofpbuf
*);
83 static void dpif_linux_dp_dump_start(struct nl_dump
*);
84 static int dpif_linux_dp_transact(const struct dpif_linux_dp
*request
,
85 struct dpif_linux_dp
*reply
,
86 struct ofpbuf
**bufp
);
87 static int dpif_linux_dp_get(const struct dpif
*, struct dpif_linux_dp
*reply
,
88 struct ofpbuf
**bufp
);
90 struct dpif_linux_flow
{
91 /* Generic Netlink header. */
94 /* struct ovs_header. */
95 unsigned int nlmsg_flags
;
100 * The 'stats' member points to 64-bit data that might only be aligned on
101 * 32-bit boundaries, so get_unaligned_u64() should be used to access its
104 * If 'actions' is nonnull then OVS_FLOW_ATTR_ACTIONS will be included in
105 * the Netlink version of the command, even if actions_len is zero. */
106 const struct nlattr
*key
; /* OVS_FLOW_ATTR_KEY. */
108 const struct nlattr
*actions
; /* OVS_FLOW_ATTR_ACTIONS. */
110 const struct ovs_flow_stats
*stats
; /* OVS_FLOW_ATTR_STATS. */
111 const uint8_t *tcp_flags
; /* OVS_FLOW_ATTR_TCP_FLAGS. */
112 const ovs_32aligned_u64
*used
; /* OVS_FLOW_ATTR_USED. */
113 bool clear
; /* OVS_FLOW_ATTR_CLEAR. */
116 static void dpif_linux_flow_init(struct dpif_linux_flow
*);
117 static int dpif_linux_flow_from_ofpbuf(struct dpif_linux_flow
*,
118 const struct ofpbuf
*);
119 static void dpif_linux_flow_to_ofpbuf(const struct dpif_linux_flow
*,
121 static int dpif_linux_flow_transact(struct dpif_linux_flow
*request
,
122 struct dpif_linux_flow
*reply
,
123 struct ofpbuf
**bufp
);
124 static void dpif_linux_flow_get_stats(const struct dpif_linux_flow
*,
125 struct dpif_flow_stats
*);
127 /* One of the dpif channels between the kernel and userspace. */
128 struct dpif_channel
{
129 struct nl_sock
*sock
; /* Netlink socket. */
130 long long int last_poll
; /* Last time this channel was polled. */
133 static void report_loss(struct dpif
*, struct dpif_channel
*);
135 /* Datapath interface for the openvswitch Linux kernel module. */
140 /* Upcall messages. */
141 int uc_array_size
; /* Size of 'channels' and 'epoll_events'. */
142 struct dpif_channel
*channels
;
143 struct epoll_event
*epoll_events
;
144 int epoll_fd
; /* epoll fd that includes channel socks. */
145 int n_events
; /* Num events returned by epoll_wait(). */
146 int event_offset
; /* Offset into 'epoll_events'. */
148 /* Change notification. */
149 struct sset changed_ports
; /* Ports that have changed. */
150 struct nln_notifier
*port_notifier
;
154 static struct vlog_rate_limit error_rl
= VLOG_RATE_LIMIT_INIT(9999, 5);
156 /* Generic Netlink family numbers for OVS. */
157 static int ovs_datapath_family
;
158 static int ovs_vport_family
;
159 static int ovs_flow_family
;
160 static int ovs_packet_family
;
162 /* Generic Netlink socket. */
163 static struct nl_sock
*genl_sock
;
164 static struct nln
*nln
= NULL
;
166 static int dpif_linux_init(void);
167 static void open_dpif(const struct dpif_linux_dp
*, struct dpif
**);
168 static bool dpif_linux_nln_parse(struct ofpbuf
*, void *);
169 static void dpif_linux_port_changed(const void *vport
, void *dpif
);
170 static uint32_t dpif_linux_port_get_pid(const struct dpif
*, uint32_t port_no
);
172 static void dpif_linux_vport_to_ofpbuf(const struct dpif_linux_vport
*,
174 static int dpif_linux_vport_from_ofpbuf(struct dpif_linux_vport
*,
175 const struct ofpbuf
*);
177 static struct dpif_linux
*
178 dpif_linux_cast(const struct dpif
*dpif
)
180 dpif_assert_class(dpif
, &dpif_linux_class
);
181 return CONTAINER_OF(dpif
, struct dpif_linux
, dpif
);
185 dpif_linux_enumerate(struct sset
*all_dps
)
191 error
= dpif_linux_init();
196 dpif_linux_dp_dump_start(&dump
);
197 while (nl_dump_next(&dump
, &msg
)) {
198 struct dpif_linux_dp dp
;
200 if (!dpif_linux_dp_from_ofpbuf(&dp
, &msg
)) {
201 sset_add(all_dps
, dp
.name
);
204 return nl_dump_done(&dump
);
208 dpif_linux_open(const struct dpif_class
*class OVS_UNUSED
, const char *name
,
209 bool create
, struct dpif
**dpifp
)
211 struct dpif_linux_dp dp_request
, dp
;
216 error
= dpif_linux_init();
221 /* Create or look up datapath. */
222 dpif_linux_dp_init(&dp_request
);
224 dp_request
.cmd
= OVS_DP_CMD_NEW
;
226 dp_request
.upcall_pid
= &upcall_pid
;
228 dp_request
.cmd
= OVS_DP_CMD_GET
;
230 dp_request
.name
= name
;
231 error
= dpif_linux_dp_transact(&dp_request
, &dp
, &buf
);
236 open_dpif(&dp
, dpifp
);
242 open_dpif(const struct dpif_linux_dp
*dp
, struct dpif
**dpifp
)
244 struct dpif_linux
*dpif
;
246 dpif
= xzalloc(sizeof *dpif
);
247 dpif
->port_notifier
= nln_notifier_create(nln
, dpif_linux_port_changed
,
251 dpif_init(&dpif
->dpif
, &dpif_linux_class
, dp
->name
,
252 dp
->dp_ifindex
, dp
->dp_ifindex
);
254 dpif
->dp_ifindex
= dp
->dp_ifindex
;
255 sset_init(&dpif
->changed_ports
);
256 *dpifp
= &dpif
->dpif
;
260 destroy_channels(struct dpif_linux
*dpif
)
264 if (dpif
->epoll_fd
< 0) {
268 for (i
= 0; i
< dpif
->uc_array_size
; i
++ ) {
269 struct dpif_linux_vport vport_request
;
270 struct dpif_channel
*ch
= &dpif
->channels
[i
];
271 uint32_t upcall_pid
= 0;
277 /* Turn off upcalls. */
278 dpif_linux_vport_init(&vport_request
);
279 vport_request
.cmd
= OVS_VPORT_CMD_SET
;
280 vport_request
.dp_ifindex
= dpif
->dp_ifindex
;
281 vport_request
.port_no
= i
;
282 vport_request
.upcall_pid
= &upcall_pid
;
283 dpif_linux_vport_transact(&vport_request
, NULL
, NULL
);
285 nl_sock_destroy(ch
->sock
);
288 free(dpif
->channels
);
289 dpif
->channels
= NULL
;
290 dpif
->uc_array_size
= 0;
292 free(dpif
->epoll_events
);
293 dpif
->epoll_events
= NULL
;
294 dpif
->n_events
= dpif
->event_offset
= 0;
296 close(dpif
->epoll_fd
);
301 add_channel(struct dpif_linux
*dpif
, uint32_t port_no
, struct nl_sock
*sock
)
303 struct epoll_event event
;
305 if (dpif
->epoll_fd
< 0) {
309 /* We assume that the datapath densely chooses port numbers, which
310 * can therefore be used as an index into an array of channels. */
311 if (port_no
>= dpif
->uc_array_size
) {
312 int new_size
= port_no
+ 1;
315 if (new_size
> 65535) {
316 VLOG_WARN_RL(&error_rl
, "%s: datapath port %"PRIu32
" too big",
317 dpif_name(&dpif
->dpif
), port_no
);
321 dpif
->channels
= xrealloc(dpif
->channels
,
322 new_size
* sizeof *dpif
->channels
);
323 for (i
= dpif
->uc_array_size
; i
< new_size
; i
++) {
324 dpif
->channels
[i
].sock
= NULL
;
327 dpif
->epoll_events
= xrealloc(dpif
->epoll_events
,
328 new_size
* sizeof *dpif
->epoll_events
);
329 dpif
->uc_array_size
= new_size
;
332 memset(&event
, 0, sizeof event
);
333 event
.events
= EPOLLIN
;
334 event
.data
.u32
= port_no
;
335 if (epoll_ctl(dpif
->epoll_fd
, EPOLL_CTL_ADD
, nl_sock_fd(sock
),
340 dpif
->channels
[port_no
].sock
= sock
;
341 dpif
->channels
[port_no
].last_poll
= LLONG_MIN
;
347 del_channel(struct dpif_linux
*dpif
, uint32_t port_no
)
349 struct dpif_channel
*ch
;
351 if (dpif
->epoll_fd
< 0 || port_no
>= dpif
->uc_array_size
) {
355 ch
= &dpif
->channels
[port_no
];
360 epoll_ctl(dpif
->epoll_fd
, EPOLL_CTL_DEL
, nl_sock_fd(ch
->sock
), NULL
);
362 nl_sock_destroy(ch
->sock
);
367 dpif_linux_close(struct dpif
*dpif_
)
369 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
371 nln_notifier_destroy(dpif
->port_notifier
);
372 destroy_channels(dpif
);
373 sset_destroy(&dpif
->changed_ports
);
378 dpif_linux_destroy(struct dpif
*dpif_
)
380 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
381 struct dpif_linux_dp dp
;
383 dpif_linux_dp_init(&dp
);
384 dp
.cmd
= OVS_DP_CMD_DEL
;
385 dp
.dp_ifindex
= dpif
->dp_ifindex
;
386 return dpif_linux_dp_transact(&dp
, NULL
, NULL
);
390 dpif_linux_run(struct dpif
*dpif_ OVS_UNUSED
)
398 dpif_linux_wait(struct dpif
*dpif OVS_UNUSED
)
406 dpif_linux_get_stats(const struct dpif
*dpif_
, struct dpif_dp_stats
*stats
)
408 struct dpif_linux_dp dp
;
412 error
= dpif_linux_dp_get(dpif_
, &dp
, &buf
);
414 stats
->n_hit
= dp
.stats
.n_hit
;
415 stats
->n_missed
= dp
.stats
.n_missed
;
416 stats
->n_lost
= dp
.stats
.n_lost
;
417 stats
->n_flows
= dp
.stats
.n_flows
;
424 get_vport_type(const struct dpif_linux_vport
*vport
)
426 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(5, 20);
428 switch (vport
->type
) {
429 case OVS_VPORT_TYPE_NETDEV
:
432 case OVS_VPORT_TYPE_INTERNAL
:
435 case OVS_VPORT_TYPE_GRE
:
438 case OVS_VPORT_TYPE_GRE64
:
441 case OVS_VPORT_TYPE_VXLAN
:
444 case OVS_VPORT_TYPE_LISP
:
447 case OVS_VPORT_TYPE_UNSPEC
:
448 case __OVS_VPORT_TYPE_MAX
:
452 VLOG_WARN_RL(&rl
, "dp%d: port `%s' has unsupported type %u",
453 vport
->dp_ifindex
, vport
->name
, (unsigned int) vport
->type
);
457 static enum ovs_vport_type
458 netdev_to_ovs_vport_type(const struct netdev
*netdev
)
460 const char *type
= netdev_get_type(netdev
);
462 if (!strcmp(type
, "tap") || !strcmp(type
, "system")) {
463 return OVS_VPORT_TYPE_NETDEV
;
464 } else if (!strcmp(type
, "internal")) {
465 return OVS_VPORT_TYPE_INTERNAL
;
466 } else if (strstr(type
, "gre64")) {
467 return OVS_VPORT_TYPE_GRE64
;
468 } else if (strstr(type
, "gre")) {
469 return OVS_VPORT_TYPE_GRE
;
470 } else if (!strcmp(type
, "vxlan")) {
471 return OVS_VPORT_TYPE_VXLAN
;
472 } else if (!strcmp(type
, "lisp")) {
473 return OVS_VPORT_TYPE_LISP
;
475 return OVS_VPORT_TYPE_UNSPEC
;
480 dpif_linux_port_add(struct dpif
*dpif_
, struct netdev
*netdev
,
483 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
484 const struct netdev_tunnel_config
*tnl_cfg
;
485 const char *name
= netdev_vport_get_dpif_port(netdev
);
486 const char *type
= netdev_get_type(netdev
);
487 struct dpif_linux_vport request
, reply
;
488 struct nl_sock
*sock
= NULL
;
491 uint64_t options_stub
[64 / 8];
492 struct ofpbuf options
;
495 if (dpif
->epoll_fd
>= 0) {
496 error
= nl_sock_create(NETLINK_GENERIC
, &sock
);
502 dpif_linux_vport_init(&request
);
503 request
.cmd
= OVS_VPORT_CMD_NEW
;
504 request
.dp_ifindex
= dpif
->dp_ifindex
;
505 request
.type
= netdev_to_ovs_vport_type(netdev
);
506 if (request
.type
== OVS_VPORT_TYPE_UNSPEC
) {
507 VLOG_WARN_RL(&error_rl
, "%s: cannot create port `%s' because it has "
508 "unsupported type `%s'",
509 dpif_name(dpif_
), name
, type
);
510 nl_sock_destroy(sock
);
515 if (request
.type
== OVS_VPORT_TYPE_NETDEV
) {
516 netdev_linux_ethtool_set_flag(netdev
, ETH_FLAG_LRO
, "LRO", false);
519 tnl_cfg
= netdev_get_tunnel_config(netdev
);
520 if (tnl_cfg
&& tnl_cfg
->dst_port
!= 0) {
521 ofpbuf_use_stack(&options
, options_stub
, sizeof options_stub
);
522 nl_msg_put_u16(&options
, OVS_TUNNEL_ATTR_DST_PORT
,
523 ntohs(tnl_cfg
->dst_port
));
524 request
.options
= options
.data
;
525 request
.options_len
= options
.size
;
528 request
.port_no
= *port_nop
;
529 upcall_pid
= sock
? nl_sock_pid(sock
) : 0;
530 request
.upcall_pid
= &upcall_pid
;
532 error
= dpif_linux_vport_transact(&request
, &reply
, &buf
);
534 *port_nop
= reply
.port_no
;
535 VLOG_DBG("%s: assigning port %"PRIu32
" to netlink pid %"PRIu32
,
536 dpif_name(dpif_
), reply
.port_no
, upcall_pid
);
538 if (error
== EBUSY
&& *port_nop
!= UINT32_MAX
) {
539 VLOG_INFO("%s: requested port %"PRIu32
" is in use",
540 dpif_name(dpif_
), *port_nop
);
542 nl_sock_destroy(sock
);
549 error
= add_channel(dpif
, *port_nop
, sock
);
551 VLOG_INFO("%s: could not add channel for port %s",
552 dpif_name(dpif_
), name
);
554 /* Delete the port. */
555 dpif_linux_vport_init(&request
);
556 request
.cmd
= OVS_VPORT_CMD_DEL
;
557 request
.dp_ifindex
= dpif
->dp_ifindex
;
558 request
.port_no
= *port_nop
;
559 dpif_linux_vport_transact(&request
, NULL
, NULL
);
561 nl_sock_destroy(sock
);
570 dpif_linux_port_del(struct dpif
*dpif_
, uint32_t port_no
)
572 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
573 struct dpif_linux_vport vport
;
576 dpif_linux_vport_init(&vport
);
577 vport
.cmd
= OVS_VPORT_CMD_DEL
;
578 vport
.dp_ifindex
= dpif
->dp_ifindex
;
579 vport
.port_no
= port_no
;
580 error
= dpif_linux_vport_transact(&vport
, NULL
, NULL
);
582 del_channel(dpif
, port_no
);
588 dpif_linux_port_query__(const struct dpif
*dpif
, uint32_t port_no
,
589 const char *port_name
, struct dpif_port
*dpif_port
)
591 struct dpif_linux_vport request
;
592 struct dpif_linux_vport reply
;
596 dpif_linux_vport_init(&request
);
597 request
.cmd
= OVS_VPORT_CMD_GET
;
598 request
.dp_ifindex
= dpif_linux_cast(dpif
)->dp_ifindex
;
599 request
.port_no
= port_no
;
600 request
.name
= port_name
;
602 error
= dpif_linux_vport_transact(&request
, &reply
, &buf
);
604 if (reply
.dp_ifindex
!= request
.dp_ifindex
) {
605 /* A query by name reported that 'port_name' is in some datapath
606 * other than 'dpif', but the caller wants to know about 'dpif'. */
608 } else if (dpif_port
) {
609 dpif_port
->name
= xstrdup(reply
.name
);
610 dpif_port
->type
= xstrdup(get_vport_type(&reply
));
611 dpif_port
->port_no
= reply
.port_no
;
619 dpif_linux_port_query_by_number(const struct dpif
*dpif
, uint32_t port_no
,
620 struct dpif_port
*dpif_port
)
622 return dpif_linux_port_query__(dpif
, port_no
, NULL
, dpif_port
);
626 dpif_linux_port_query_by_name(const struct dpif
*dpif
, const char *devname
,
627 struct dpif_port
*dpif_port
)
629 return dpif_linux_port_query__(dpif
, 0, devname
, dpif_port
);
633 dpif_linux_get_max_ports(const struct dpif
*dpif OVS_UNUSED
)
639 dpif_linux_port_get_pid(const struct dpif
*dpif_
, uint32_t port_no
)
641 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
643 if (dpif
->epoll_fd
< 0) {
646 /* The UINT32_MAX "reserved" port number uses the "ovs-system"'s
647 * channel, since it is not heavily loaded. */
648 int idx
= (port_no
>= dpif
->uc_array_size
) ? 0 : port_no
;
649 return nl_sock_pid(dpif
->channels
[idx
].sock
);
654 dpif_linux_flow_flush(struct dpif
*dpif_
)
656 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
657 struct dpif_linux_flow flow
;
659 dpif_linux_flow_init(&flow
);
660 flow
.cmd
= OVS_FLOW_CMD_DEL
;
661 flow
.dp_ifindex
= dpif
->dp_ifindex
;
662 return dpif_linux_flow_transact(&flow
, NULL
, NULL
);
665 struct dpif_linux_port_state
{
670 dpif_linux_port_dump_start(const struct dpif
*dpif_
, void **statep
)
672 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
673 struct dpif_linux_port_state
*state
;
674 struct dpif_linux_vport request
;
677 *statep
= state
= xmalloc(sizeof *state
);
679 dpif_linux_vport_init(&request
);
680 request
.cmd
= OVS_DP_CMD_GET
;
681 request
.dp_ifindex
= dpif
->dp_ifindex
;
683 buf
= ofpbuf_new(1024);
684 dpif_linux_vport_to_ofpbuf(&request
, buf
);
685 nl_dump_start(&state
->dump
, genl_sock
, buf
);
692 dpif_linux_port_dump_next(const struct dpif
*dpif OVS_UNUSED
, void *state_
,
693 struct dpif_port
*dpif_port
)
695 struct dpif_linux_port_state
*state
= state_
;
696 struct dpif_linux_vport vport
;
700 if (!nl_dump_next(&state
->dump
, &buf
)) {
704 error
= dpif_linux_vport_from_ofpbuf(&vport
, &buf
);
709 dpif_port
->name
= CONST_CAST(char *, vport
.name
);
710 dpif_port
->type
= CONST_CAST(char *, get_vport_type(&vport
));
711 dpif_port
->port_no
= vport
.port_no
;
716 dpif_linux_port_dump_done(const struct dpif
*dpif_ OVS_UNUSED
, void *state_
)
718 struct dpif_linux_port_state
*state
= state_
;
719 int error
= nl_dump_done(&state
->dump
);
726 dpif_linux_port_poll(const struct dpif
*dpif_
, char **devnamep
)
728 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
730 if (dpif
->change_error
) {
731 dpif
->change_error
= false;
732 sset_clear(&dpif
->changed_ports
);
734 } else if (!sset_is_empty(&dpif
->changed_ports
)) {
735 *devnamep
= sset_pop(&dpif
->changed_ports
);
743 dpif_linux_port_poll_wait(const struct dpif
*dpif_
)
745 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
746 if (!sset_is_empty(&dpif
->changed_ports
) || dpif
->change_error
) {
747 poll_immediate_wake();
752 dpif_linux_flow_get__(const struct dpif
*dpif_
,
753 const struct nlattr
*key
, size_t key_len
,
754 struct dpif_linux_flow
*reply
, struct ofpbuf
**bufp
)
756 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
757 struct dpif_linux_flow request
;
759 dpif_linux_flow_init(&request
);
760 request
.cmd
= OVS_FLOW_CMD_GET
;
761 request
.dp_ifindex
= dpif
->dp_ifindex
;
763 request
.key_len
= key_len
;
764 return dpif_linux_flow_transact(&request
, reply
, bufp
);
768 dpif_linux_flow_get(const struct dpif
*dpif_
,
769 const struct nlattr
*key
, size_t key_len
,
770 struct ofpbuf
**actionsp
, struct dpif_flow_stats
*stats
)
772 struct dpif_linux_flow reply
;
776 error
= dpif_linux_flow_get__(dpif_
, key
, key_len
, &reply
, &buf
);
779 dpif_linux_flow_get_stats(&reply
, stats
);
782 buf
->data
= CONST_CAST(struct nlattr
*, reply
.actions
);
783 buf
->size
= reply
.actions_len
;
793 dpif_linux_init_flow_put(struct dpif
*dpif_
, const struct dpif_flow_put
*put
,
794 struct dpif_linux_flow
*request
)
796 static struct nlattr dummy_action
;
798 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
800 dpif_linux_flow_init(request
);
801 request
->cmd
= (put
->flags
& DPIF_FP_CREATE
802 ? OVS_FLOW_CMD_NEW
: OVS_FLOW_CMD_SET
);
803 request
->dp_ifindex
= dpif
->dp_ifindex
;
804 request
->key
= put
->key
;
805 request
->key_len
= put
->key_len
;
806 /* Ensure that OVS_FLOW_ATTR_ACTIONS will always be included. */
807 request
->actions
= put
->actions
? put
->actions
: &dummy_action
;
808 request
->actions_len
= put
->actions_len
;
809 if (put
->flags
& DPIF_FP_ZERO_STATS
) {
810 request
->clear
= true;
812 request
->nlmsg_flags
= put
->flags
& DPIF_FP_MODIFY
? 0 : NLM_F_CREATE
;
816 dpif_linux_flow_put(struct dpif
*dpif_
, const struct dpif_flow_put
*put
)
818 struct dpif_linux_flow request
, reply
;
822 dpif_linux_init_flow_put(dpif_
, put
, &request
);
823 error
= dpif_linux_flow_transact(&request
,
824 put
->stats
? &reply
: NULL
,
825 put
->stats
? &buf
: NULL
);
826 if (!error
&& put
->stats
) {
827 dpif_linux_flow_get_stats(&reply
, put
->stats
);
834 dpif_linux_init_flow_del(struct dpif
*dpif_
, const struct dpif_flow_del
*del
,
835 struct dpif_linux_flow
*request
)
837 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
839 dpif_linux_flow_init(request
);
840 request
->cmd
= OVS_FLOW_CMD_DEL
;
841 request
->dp_ifindex
= dpif
->dp_ifindex
;
842 request
->key
= del
->key
;
843 request
->key_len
= del
->key_len
;
847 dpif_linux_flow_del(struct dpif
*dpif_
, const struct dpif_flow_del
*del
)
849 struct dpif_linux_flow request
, reply
;
853 dpif_linux_init_flow_del(dpif_
, del
, &request
);
854 error
= dpif_linux_flow_transact(&request
,
855 del
->stats
? &reply
: NULL
,
856 del
->stats
? &buf
: NULL
);
857 if (!error
&& del
->stats
) {
858 dpif_linux_flow_get_stats(&reply
, del
->stats
);
864 struct dpif_linux_flow_state
{
866 struct dpif_linux_flow flow
;
867 struct dpif_flow_stats stats
;
872 dpif_linux_flow_dump_start(const struct dpif
*dpif_
, void **statep
)
874 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
875 struct dpif_linux_flow_state
*state
;
876 struct dpif_linux_flow request
;
879 *statep
= state
= xmalloc(sizeof *state
);
881 dpif_linux_flow_init(&request
);
882 request
.cmd
= OVS_DP_CMD_GET
;
883 request
.dp_ifindex
= dpif
->dp_ifindex
;
885 buf
= ofpbuf_new(1024);
886 dpif_linux_flow_to_ofpbuf(&request
, buf
);
887 nl_dump_start(&state
->dump
, genl_sock
, buf
);
896 dpif_linux_flow_dump_next(const struct dpif
*dpif_ OVS_UNUSED
, void *state_
,
897 const struct nlattr
**key
, size_t *key_len
,
898 const struct nlattr
**actions
, size_t *actions_len
,
899 const struct dpif_flow_stats
**stats
)
901 struct dpif_linux_flow_state
*state
= state_
;
906 ofpbuf_delete(state
->buf
);
909 if (!nl_dump_next(&state
->dump
, &buf
)) {
913 error
= dpif_linux_flow_from_ofpbuf(&state
->flow
, &buf
);
918 if (actions
&& !state
->flow
.actions
) {
919 error
= dpif_linux_flow_get__(dpif_
, state
->flow
.key
,
921 &state
->flow
, &state
->buf
);
922 if (error
== ENOENT
) {
923 VLOG_DBG("dumped flow disappeared on get");
925 VLOG_WARN("error fetching dumped flow: %s", strerror(error
));
931 *actions
= state
->flow
.actions
;
932 *actions_len
= state
->flow
.actions_len
;
935 *key
= state
->flow
.key
;
936 *key_len
= state
->flow
.key_len
;
939 dpif_linux_flow_get_stats(&state
->flow
, &state
->stats
);
940 *stats
= &state
->stats
;
946 dpif_linux_flow_dump_done(const struct dpif
*dpif OVS_UNUSED
, void *state_
)
948 struct dpif_linux_flow_state
*state
= state_
;
949 int error
= nl_dump_done(&state
->dump
);
950 ofpbuf_delete(state
->buf
);
956 dpif_linux_encode_execute(int dp_ifindex
, const struct dpif_execute
*d_exec
,
959 struct ovs_header
*k_exec
;
961 ofpbuf_prealloc_tailroom(buf
, (64
962 + d_exec
->packet
->size
964 + d_exec
->actions_len
));
966 nl_msg_put_genlmsghdr(buf
, 0, ovs_packet_family
, NLM_F_REQUEST
,
967 OVS_PACKET_CMD_EXECUTE
, OVS_PACKET_VERSION
);
969 k_exec
= ofpbuf_put_uninit(buf
, sizeof *k_exec
);
970 k_exec
->dp_ifindex
= dp_ifindex
;
972 nl_msg_put_unspec(buf
, OVS_PACKET_ATTR_PACKET
,
973 d_exec
->packet
->data
, d_exec
->packet
->size
);
974 nl_msg_put_unspec(buf
, OVS_PACKET_ATTR_KEY
, d_exec
->key
, d_exec
->key_len
);
975 nl_msg_put_unspec(buf
, OVS_PACKET_ATTR_ACTIONS
,
976 d_exec
->actions
, d_exec
->actions_len
);
980 dpif_linux_execute__(int dp_ifindex
, const struct dpif_execute
*execute
)
982 uint64_t request_stub
[1024 / 8];
983 struct ofpbuf request
;
986 ofpbuf_use_stub(&request
, request_stub
, sizeof request_stub
);
987 dpif_linux_encode_execute(dp_ifindex
, execute
, &request
);
988 error
= nl_sock_transact(genl_sock
, &request
, NULL
);
989 ofpbuf_uninit(&request
);
995 dpif_linux_execute(struct dpif
*dpif_
, const struct dpif_execute
*execute
)
997 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
999 return dpif_linux_execute__(dpif
->dp_ifindex
, execute
);
1005 dpif_linux_operate__(struct dpif
*dpif_
, struct dpif_op
**ops
, size_t n_ops
)
1007 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
1010 struct nl_transaction txn
;
1012 struct ofpbuf request
;
1013 uint64_t request_stub
[1024 / 8];
1015 struct ofpbuf reply
;
1016 uint64_t reply_stub
[1024 / 8];
1019 struct nl_transaction
*txnsp
[MAX_OPS
];
1022 ovs_assert(n_ops
<= MAX_OPS
);
1023 for (i
= 0; i
< n_ops
; i
++) {
1024 struct op_auxdata
*aux
= &auxes
[i
];
1025 struct dpif_op
*op
= ops
[i
];
1026 struct dpif_flow_put
*put
;
1027 struct dpif_flow_del
*del
;
1028 struct dpif_execute
*execute
;
1029 struct dpif_linux_flow flow
;
1031 ofpbuf_use_stub(&aux
->request
,
1032 aux
->request_stub
, sizeof aux
->request_stub
);
1033 aux
->txn
.request
= &aux
->request
;
1035 ofpbuf_use_stub(&aux
->reply
, aux
->reply_stub
, sizeof aux
->reply_stub
);
1036 aux
->txn
.reply
= NULL
;
1039 case DPIF_OP_FLOW_PUT
:
1040 put
= &op
->u
.flow_put
;
1041 dpif_linux_init_flow_put(dpif_
, put
, &flow
);
1043 flow
.nlmsg_flags
|= NLM_F_ECHO
;
1044 aux
->txn
.reply
= &aux
->reply
;
1046 dpif_linux_flow_to_ofpbuf(&flow
, &aux
->request
);
1049 case DPIF_OP_FLOW_DEL
:
1050 del
= &op
->u
.flow_del
;
1051 dpif_linux_init_flow_del(dpif_
, del
, &flow
);
1053 flow
.nlmsg_flags
|= NLM_F_ECHO
;
1054 aux
->txn
.reply
= &aux
->reply
;
1056 dpif_linux_flow_to_ofpbuf(&flow
, &aux
->request
);
1059 case DPIF_OP_EXECUTE
:
1060 execute
= &op
->u
.execute
;
1061 dpif_linux_encode_execute(dpif
->dp_ifindex
, execute
,
1070 for (i
= 0; i
< n_ops
; i
++) {
1071 txnsp
[i
] = &auxes
[i
].txn
;
1073 nl_sock_transact_multiple(genl_sock
, txnsp
, n_ops
);
1075 for (i
= 0; i
< n_ops
; i
++) {
1076 struct op_auxdata
*aux
= &auxes
[i
];
1077 struct nl_transaction
*txn
= &auxes
[i
].txn
;
1078 struct dpif_op
*op
= ops
[i
];
1079 struct dpif_flow_put
*put
;
1080 struct dpif_flow_del
*del
;
1082 op
->error
= txn
->error
;
1085 case DPIF_OP_FLOW_PUT
:
1086 put
= &op
->u
.flow_put
;
1089 struct dpif_linux_flow reply
;
1091 op
->error
= dpif_linux_flow_from_ofpbuf(&reply
,
1094 dpif_linux_flow_get_stats(&reply
, put
->stats
);
1099 memset(put
->stats
, 0, sizeof *put
->stats
);
1104 case DPIF_OP_FLOW_DEL
:
1105 del
= &op
->u
.flow_del
;
1108 struct dpif_linux_flow reply
;
1110 op
->error
= dpif_linux_flow_from_ofpbuf(&reply
,
1113 dpif_linux_flow_get_stats(&reply
, del
->stats
);
1118 memset(del
->stats
, 0, sizeof *del
->stats
);
1123 case DPIF_OP_EXECUTE
:
1130 ofpbuf_uninit(&aux
->request
);
1131 ofpbuf_uninit(&aux
->reply
);
1136 dpif_linux_operate(struct dpif
*dpif
, struct dpif_op
**ops
, size_t n_ops
)
1139 size_t chunk
= MIN(n_ops
, MAX_OPS
);
1140 dpif_linux_operate__(dpif
, ops
, chunk
);
1147 dpif_linux_recv_set(struct dpif
*dpif_
, bool enable
)
1149 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
1151 if ((dpif
->epoll_fd
>= 0) == enable
) {
1156 destroy_channels(dpif
);
1158 struct dpif_port_dump port_dump
;
1159 struct dpif_port port
;
1161 dpif
->epoll_fd
= epoll_create(10);
1162 if (dpif
->epoll_fd
< 0) {
1166 DPIF_PORT_FOR_EACH (&port
, &port_dump
, &dpif
->dpif
) {
1167 struct dpif_linux_vport vport_request
;
1168 struct nl_sock
*sock
;
1169 uint32_t upcall_pid
;
1172 error
= nl_sock_create(NETLINK_GENERIC
, &sock
);
1177 upcall_pid
= nl_sock_pid(sock
);
1179 dpif_linux_vport_init(&vport_request
);
1180 vport_request
.cmd
= OVS_VPORT_CMD_SET
;
1181 vport_request
.dp_ifindex
= dpif
->dp_ifindex
;
1182 vport_request
.port_no
= port
.port_no
;
1183 vport_request
.upcall_pid
= &upcall_pid
;
1184 error
= dpif_linux_vport_transact(&vport_request
, NULL
, NULL
);
1186 VLOG_DBG("%s: assigning port %"PRIu32
" to netlink pid %"PRIu32
,
1187 dpif_name(&dpif
->dpif
), vport_request
.port_no
,
1190 VLOG_WARN_RL(&error_rl
,
1191 "%s: failed to set upcall pid on port: %s",
1192 dpif_name(&dpif
->dpif
), strerror(error
));
1193 nl_sock_destroy(sock
);
1195 if (error
== ENODEV
|| error
== ENOENT
) {
1196 /* This device isn't there, but keep trying the others. */
1203 error
= add_channel(dpif
, port
.port_no
, sock
);
1205 VLOG_INFO("%s: could not add channel for port %s",
1206 dpif_name(dpif_
), port
.name
);
1207 nl_sock_destroy(sock
);
1217 dpif_linux_queue_to_priority(const struct dpif
*dpif OVS_UNUSED
,
1218 uint32_t queue_id
, uint32_t *priority
)
1220 if (queue_id
< 0xf000) {
1221 *priority
= TC_H_MAKE(1 << 16, queue_id
+ 1);
1229 parse_odp_packet(struct ofpbuf
*buf
, struct dpif_upcall
*upcall
,
1232 static const struct nl_policy ovs_packet_policy
[] = {
1233 /* Always present. */
1234 [OVS_PACKET_ATTR_PACKET
] = { .type
= NL_A_UNSPEC
,
1235 .min_len
= ETH_HEADER_LEN
},
1236 [OVS_PACKET_ATTR_KEY
] = { .type
= NL_A_NESTED
},
1238 /* OVS_PACKET_CMD_ACTION only. */
1239 [OVS_PACKET_ATTR_USERDATA
] = { .type
= NL_A_UNSPEC
, .optional
= true },
1242 struct ovs_header
*ovs_header
;
1243 struct nlattr
*a
[ARRAY_SIZE(ovs_packet_policy
)];
1244 struct nlmsghdr
*nlmsg
;
1245 struct genlmsghdr
*genl
;
1249 ofpbuf_use_const(&b
, buf
->data
, buf
->size
);
1251 nlmsg
= ofpbuf_try_pull(&b
, sizeof *nlmsg
);
1252 genl
= ofpbuf_try_pull(&b
, sizeof *genl
);
1253 ovs_header
= ofpbuf_try_pull(&b
, sizeof *ovs_header
);
1254 if (!nlmsg
|| !genl
|| !ovs_header
1255 || nlmsg
->nlmsg_type
!= ovs_packet_family
1256 || !nl_policy_parse(&b
, 0, ovs_packet_policy
, a
,
1257 ARRAY_SIZE(ovs_packet_policy
))) {
1261 type
= (genl
->cmd
== OVS_PACKET_CMD_MISS
? DPIF_UC_MISS
1262 : genl
->cmd
== OVS_PACKET_CMD_ACTION
? DPIF_UC_ACTION
1268 memset(upcall
, 0, sizeof *upcall
);
1269 upcall
->type
= type
;
1270 upcall
->packet
= buf
;
1271 upcall
->packet
->data
= CONST_CAST(struct nlattr
*,
1272 nl_attr_get(a
[OVS_PACKET_ATTR_PACKET
]));
1273 upcall
->packet
->size
= nl_attr_get_size(a
[OVS_PACKET_ATTR_PACKET
]);
1274 upcall
->key
= CONST_CAST(struct nlattr
*,
1275 nl_attr_get(a
[OVS_PACKET_ATTR_KEY
]));
1276 upcall
->key_len
= nl_attr_get_size(a
[OVS_PACKET_ATTR_KEY
]);
1277 upcall
->userdata
= a
[OVS_PACKET_ATTR_USERDATA
];
1278 *dp_ifindex
= ovs_header
->dp_ifindex
;
1284 dpif_linux_recv(struct dpif
*dpif_
, struct dpif_upcall
*upcall
,
1287 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
1290 if (dpif
->epoll_fd
< 0) {
1294 if (dpif
->event_offset
>= dpif
->n_events
) {
1297 dpif
->event_offset
= dpif
->n_events
= 0;
1300 retval
= epoll_wait(dpif
->epoll_fd
, dpif
->epoll_events
,
1301 dpif
->uc_array_size
, 0);
1302 } while (retval
< 0 && errno
== EINTR
);
1304 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(1, 1);
1305 VLOG_WARN_RL(&rl
, "epoll_wait failed (%s)", strerror(errno
));
1306 } else if (retval
> 0) {
1307 dpif
->n_events
= retval
;
1311 while (dpif
->event_offset
< dpif
->n_events
) {
1312 int idx
= dpif
->epoll_events
[dpif
->event_offset
].data
.u32
;
1313 struct dpif_channel
*ch
= &dpif
->channels
[idx
];
1315 dpif
->event_offset
++;
1321 if (++read_tries
> 50) {
1325 error
= nl_sock_recv(ch
->sock
, buf
, false);
1326 if (error
== ENOBUFS
) {
1327 /* ENOBUFS typically means that we've received so many
1328 * packets that the buffer overflowed. Try again
1329 * immediately because there's almost certainly a packet
1330 * waiting for us. */
1331 report_loss(dpif_
, ch
);
1335 ch
->last_poll
= time_msec();
1337 if (error
== EAGAIN
) {
1343 error
= parse_odp_packet(buf
, upcall
, &dp_ifindex
);
1344 if (!error
&& dp_ifindex
== dpif
->dp_ifindex
) {
1356 dpif_linux_recv_wait(struct dpif
*dpif_
)
1358 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
1360 if (dpif
->epoll_fd
< 0) {
1364 poll_fd_wait(dpif
->epoll_fd
, POLLIN
);
1368 dpif_linux_recv_purge(struct dpif
*dpif_
)
1370 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
1371 struct dpif_channel
*ch
;
1373 if (dpif
->epoll_fd
< 0) {
1377 for (ch
= dpif
->channels
; ch
< &dpif
->channels
[dpif
->uc_array_size
]; ch
++) {
1379 nl_sock_drain(ch
->sock
);
1384 const struct dpif_class dpif_linux_class
= {
1386 dpif_linux_enumerate
,
1393 dpif_linux_get_stats
,
1394 dpif_linux_port_add
,
1395 dpif_linux_port_del
,
1396 dpif_linux_port_query_by_number
,
1397 dpif_linux_port_query_by_name
,
1398 dpif_linux_get_max_ports
,
1399 dpif_linux_port_get_pid
,
1400 dpif_linux_port_dump_start
,
1401 dpif_linux_port_dump_next
,
1402 dpif_linux_port_dump_done
,
1403 dpif_linux_port_poll
,
1404 dpif_linux_port_poll_wait
,
1405 dpif_linux_flow_get
,
1406 dpif_linux_flow_put
,
1407 dpif_linux_flow_del
,
1408 dpif_linux_flow_flush
,
1409 dpif_linux_flow_dump_start
,
1410 dpif_linux_flow_dump_next
,
1411 dpif_linux_flow_dump_done
,
1414 dpif_linux_recv_set
,
1415 dpif_linux_queue_to_priority
,
1417 dpif_linux_recv_wait
,
1418 dpif_linux_recv_purge
,
1422 dpif_linux_init(void)
1424 static int error
= -1;
1427 unsigned int ovs_vport_mcgroup
;
1429 error
= nl_lookup_genl_family(OVS_DATAPATH_FAMILY
,
1430 &ovs_datapath_family
);
1432 VLOG_ERR("Generic Netlink family '%s' does not exist. "
1433 "The Open vSwitch kernel module is probably not loaded.",
1434 OVS_DATAPATH_FAMILY
);
1437 error
= nl_lookup_genl_family(OVS_VPORT_FAMILY
, &ovs_vport_family
);
1440 error
= nl_lookup_genl_family(OVS_FLOW_FAMILY
, &ovs_flow_family
);
1443 error
= nl_lookup_genl_family(OVS_PACKET_FAMILY
,
1444 &ovs_packet_family
);
1447 error
= nl_sock_create(NETLINK_GENERIC
, &genl_sock
);
1450 error
= nl_lookup_genl_mcgroup(OVS_VPORT_FAMILY
, OVS_VPORT_MCGROUP
,
1452 OVS_VPORT_MCGROUP_FALLBACK_ID
);
1455 static struct dpif_linux_vport vport
;
1456 nln
= nln_create(NETLINK_GENERIC
, ovs_vport_mcgroup
,
1457 dpif_linux_nln_parse
, &vport
);
1465 dpif_linux_is_internal_device(const char *name
)
1467 struct dpif_linux_vport reply
;
1471 error
= dpif_linux_vport_get(name
, &reply
, &buf
);
1474 } else if (error
!= ENODEV
&& error
!= ENOENT
) {
1475 VLOG_WARN_RL(&error_rl
, "%s: vport query failed (%s)",
1476 name
, strerror(error
));
1479 return reply
.type
== OVS_VPORT_TYPE_INTERNAL
;
1483 dpif_linux_nln_parse(struct ofpbuf
*buf
, void *vport_
)
1485 struct dpif_linux_vport
*vport
= vport_
;
1486 return dpif_linux_vport_from_ofpbuf(vport
, buf
) == 0;
1490 dpif_linux_port_changed(const void *vport_
, void *dpif_
)
1492 const struct dpif_linux_vport
*vport
= vport_
;
1493 struct dpif_linux
*dpif
= dpif_
;
1496 if (vport
->dp_ifindex
== dpif
->dp_ifindex
1497 && (vport
->cmd
== OVS_VPORT_CMD_NEW
1498 || vport
->cmd
== OVS_VPORT_CMD_DEL
1499 || vport
->cmd
== OVS_VPORT_CMD_SET
)) {
1500 VLOG_DBG("port_changed: dpif:%s vport:%s cmd:%"PRIu8
,
1501 dpif
->dpif
.full_name
, vport
->name
, vport
->cmd
);
1502 sset_add(&dpif
->changed_ports
, vport
->name
);
1505 dpif
->change_error
= true;
1509 /* Parses the contents of 'buf', which contains a "struct ovs_header" followed
1510 * by Netlink attributes, into 'vport'. Returns 0 if successful, otherwise a
1511 * positive errno value.
1513 * 'vport' will contain pointers into 'buf', so the caller should not free
1514 * 'buf' while 'vport' is still in use. */
1516 dpif_linux_vport_from_ofpbuf(struct dpif_linux_vport
*vport
,
1517 const struct ofpbuf
*buf
)
1519 static const struct nl_policy ovs_vport_policy
[] = {
1520 [OVS_VPORT_ATTR_PORT_NO
] = { .type
= NL_A_U32
},
1521 [OVS_VPORT_ATTR_TYPE
] = { .type
= NL_A_U32
},
1522 [OVS_VPORT_ATTR_NAME
] = { .type
= NL_A_STRING
, .max_len
= IFNAMSIZ
},
1523 [OVS_VPORT_ATTR_UPCALL_PID
] = { .type
= NL_A_U32
},
1524 [OVS_VPORT_ATTR_STATS
] = { NL_POLICY_FOR(struct ovs_vport_stats
),
1526 [OVS_VPORT_ATTR_OPTIONS
] = { .type
= NL_A_NESTED
, .optional
= true },
1529 struct nlattr
*a
[ARRAY_SIZE(ovs_vport_policy
)];
1530 struct ovs_header
*ovs_header
;
1531 struct nlmsghdr
*nlmsg
;
1532 struct genlmsghdr
*genl
;
1535 dpif_linux_vport_init(vport
);
1537 ofpbuf_use_const(&b
, buf
->data
, buf
->size
);
1538 nlmsg
= ofpbuf_try_pull(&b
, sizeof *nlmsg
);
1539 genl
= ofpbuf_try_pull(&b
, sizeof *genl
);
1540 ovs_header
= ofpbuf_try_pull(&b
, sizeof *ovs_header
);
1541 if (!nlmsg
|| !genl
|| !ovs_header
1542 || nlmsg
->nlmsg_type
!= ovs_vport_family
1543 || !nl_policy_parse(&b
, 0, ovs_vport_policy
, a
,
1544 ARRAY_SIZE(ovs_vport_policy
))) {
1548 vport
->cmd
= genl
->cmd
;
1549 vport
->dp_ifindex
= ovs_header
->dp_ifindex
;
1550 vport
->port_no
= nl_attr_get_u32(a
[OVS_VPORT_ATTR_PORT_NO
]);
1551 vport
->type
= nl_attr_get_u32(a
[OVS_VPORT_ATTR_TYPE
]);
1552 vport
->name
= nl_attr_get_string(a
[OVS_VPORT_ATTR_NAME
]);
1553 if (a
[OVS_VPORT_ATTR_UPCALL_PID
]) {
1554 vport
->upcall_pid
= nl_attr_get(a
[OVS_VPORT_ATTR_UPCALL_PID
]);
1556 if (a
[OVS_VPORT_ATTR_STATS
]) {
1557 vport
->stats
= nl_attr_get(a
[OVS_VPORT_ATTR_STATS
]);
1559 if (a
[OVS_VPORT_ATTR_OPTIONS
]) {
1560 vport
->options
= nl_attr_get(a
[OVS_VPORT_ATTR_OPTIONS
]);
1561 vport
->options_len
= nl_attr_get_size(a
[OVS_VPORT_ATTR_OPTIONS
]);
1566 /* Appends to 'buf' (which must initially be empty) a "struct ovs_header"
1567 * followed by Netlink attributes corresponding to 'vport'. */
1569 dpif_linux_vport_to_ofpbuf(const struct dpif_linux_vport
*vport
,
1572 struct ovs_header
*ovs_header
;
1574 nl_msg_put_genlmsghdr(buf
, 0, ovs_vport_family
, NLM_F_REQUEST
| NLM_F_ECHO
,
1575 vport
->cmd
, OVS_VPORT_VERSION
);
1577 ovs_header
= ofpbuf_put_uninit(buf
, sizeof *ovs_header
);
1578 ovs_header
->dp_ifindex
= vport
->dp_ifindex
;
1580 if (vport
->port_no
!= UINT32_MAX
) {
1581 nl_msg_put_u32(buf
, OVS_VPORT_ATTR_PORT_NO
, vport
->port_no
);
1584 if (vport
->type
!= OVS_VPORT_TYPE_UNSPEC
) {
1585 nl_msg_put_u32(buf
, OVS_VPORT_ATTR_TYPE
, vport
->type
);
1589 nl_msg_put_string(buf
, OVS_VPORT_ATTR_NAME
, vport
->name
);
1592 if (vport
->upcall_pid
) {
1593 nl_msg_put_u32(buf
, OVS_VPORT_ATTR_UPCALL_PID
, *vport
->upcall_pid
);
1597 nl_msg_put_unspec(buf
, OVS_VPORT_ATTR_STATS
,
1598 vport
->stats
, sizeof *vport
->stats
);
1601 if (vport
->options
) {
1602 nl_msg_put_nested(buf
, OVS_VPORT_ATTR_OPTIONS
,
1603 vport
->options
, vport
->options_len
);
1607 /* Clears 'vport' to "empty" values. */
1609 dpif_linux_vport_init(struct dpif_linux_vport
*vport
)
1611 memset(vport
, 0, sizeof *vport
);
1612 vport
->port_no
= UINT32_MAX
;
1615 /* Executes 'request' in the kernel datapath. If the command fails, returns a
1616 * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0
1617 * without doing anything else. If 'reply' and 'bufp' are nonnull, then the
1618 * result of the command is expected to be an ovs_vport also, which is decoded
1619 * and stored in '*reply' and '*bufp'. The caller must free '*bufp' when the
1620 * reply is no longer needed ('reply' will contain pointers into '*bufp'). */
1622 dpif_linux_vport_transact(const struct dpif_linux_vport
*request
,
1623 struct dpif_linux_vport
*reply
,
1624 struct ofpbuf
**bufp
)
1626 struct ofpbuf
*request_buf
;
1629 ovs_assert((reply
!= NULL
) == (bufp
!= NULL
));
1631 error
= dpif_linux_init();
1635 dpif_linux_vport_init(reply
);
1640 request_buf
= ofpbuf_new(1024);
1641 dpif_linux_vport_to_ofpbuf(request
, request_buf
);
1642 error
= nl_sock_transact(genl_sock
, request_buf
, bufp
);
1643 ofpbuf_delete(request_buf
);
1647 error
= dpif_linux_vport_from_ofpbuf(reply
, *bufp
);
1650 dpif_linux_vport_init(reply
);
1651 ofpbuf_delete(*bufp
);
1658 /* Obtains information about the kernel vport named 'name' and stores it into
1659 * '*reply' and '*bufp'. The caller must free '*bufp' when the reply is no
1660 * longer needed ('reply' will contain pointers into '*bufp'). */
1662 dpif_linux_vport_get(const char *name
, struct dpif_linux_vport
*reply
,
1663 struct ofpbuf
**bufp
)
1665 struct dpif_linux_vport request
;
1667 dpif_linux_vport_init(&request
);
1668 request
.cmd
= OVS_VPORT_CMD_GET
;
1669 request
.name
= name
;
1671 return dpif_linux_vport_transact(&request
, reply
, bufp
);
1674 /* Parses the contents of 'buf', which contains a "struct ovs_header" followed
1675 * by Netlink attributes, into 'dp'. Returns 0 if successful, otherwise a
1676 * positive errno value.
1678 * 'dp' will contain pointers into 'buf', so the caller should not free 'buf'
1679 * while 'dp' is still in use. */
1681 dpif_linux_dp_from_ofpbuf(struct dpif_linux_dp
*dp
, const struct ofpbuf
*buf
)
1683 static const struct nl_policy ovs_datapath_policy
[] = {
1684 [OVS_DP_ATTR_NAME
] = { .type
= NL_A_STRING
, .max_len
= IFNAMSIZ
},
1685 [OVS_DP_ATTR_STATS
] = { NL_POLICY_FOR(struct ovs_dp_stats
),
1689 struct nlattr
*a
[ARRAY_SIZE(ovs_datapath_policy
)];
1690 struct ovs_header
*ovs_header
;
1691 struct nlmsghdr
*nlmsg
;
1692 struct genlmsghdr
*genl
;
1695 dpif_linux_dp_init(dp
);
1697 ofpbuf_use_const(&b
, buf
->data
, buf
->size
);
1698 nlmsg
= ofpbuf_try_pull(&b
, sizeof *nlmsg
);
1699 genl
= ofpbuf_try_pull(&b
, sizeof *genl
);
1700 ovs_header
= ofpbuf_try_pull(&b
, sizeof *ovs_header
);
1701 if (!nlmsg
|| !genl
|| !ovs_header
1702 || nlmsg
->nlmsg_type
!= ovs_datapath_family
1703 || !nl_policy_parse(&b
, 0, ovs_datapath_policy
, a
,
1704 ARRAY_SIZE(ovs_datapath_policy
))) {
1708 dp
->cmd
= genl
->cmd
;
1709 dp
->dp_ifindex
= ovs_header
->dp_ifindex
;
1710 dp
->name
= nl_attr_get_string(a
[OVS_DP_ATTR_NAME
]);
1711 if (a
[OVS_DP_ATTR_STATS
]) {
1712 /* Can't use structure assignment because Netlink doesn't ensure
1713 * sufficient alignment for 64-bit members. */
1714 memcpy(&dp
->stats
, nl_attr_get(a
[OVS_DP_ATTR_STATS
]),
1721 /* Appends to 'buf' the Generic Netlink message described by 'dp'. */
1723 dpif_linux_dp_to_ofpbuf(const struct dpif_linux_dp
*dp
, struct ofpbuf
*buf
)
1725 struct ovs_header
*ovs_header
;
1727 nl_msg_put_genlmsghdr(buf
, 0, ovs_datapath_family
,
1728 NLM_F_REQUEST
| NLM_F_ECHO
, dp
->cmd
,
1729 OVS_DATAPATH_VERSION
);
1731 ovs_header
= ofpbuf_put_uninit(buf
, sizeof *ovs_header
);
1732 ovs_header
->dp_ifindex
= dp
->dp_ifindex
;
1735 nl_msg_put_string(buf
, OVS_DP_ATTR_NAME
, dp
->name
);
1738 if (dp
->upcall_pid
) {
1739 nl_msg_put_u32(buf
, OVS_DP_ATTR_UPCALL_PID
, *dp
->upcall_pid
);
1742 /* Skip OVS_DP_ATTR_STATS since we never have a reason to serialize it. */
1745 /* Clears 'dp' to "empty" values. */
1747 dpif_linux_dp_init(struct dpif_linux_dp
*dp
)
1749 memset(dp
, 0, sizeof *dp
);
1753 dpif_linux_dp_dump_start(struct nl_dump
*dump
)
1755 struct dpif_linux_dp request
;
1758 dpif_linux_dp_init(&request
);
1759 request
.cmd
= OVS_DP_CMD_GET
;
1761 buf
= ofpbuf_new(1024);
1762 dpif_linux_dp_to_ofpbuf(&request
, buf
);
1763 nl_dump_start(dump
, genl_sock
, buf
);
1767 /* Executes 'request' in the kernel datapath. If the command fails, returns a
1768 * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0
1769 * without doing anything else. If 'reply' and 'bufp' are nonnull, then the
1770 * result of the command is expected to be of the same form, which is decoded
1771 * and stored in '*reply' and '*bufp'. The caller must free '*bufp' when the
1772 * reply is no longer needed ('reply' will contain pointers into '*bufp'). */
1774 dpif_linux_dp_transact(const struct dpif_linux_dp
*request
,
1775 struct dpif_linux_dp
*reply
, struct ofpbuf
**bufp
)
1777 struct ofpbuf
*request_buf
;
1780 ovs_assert((reply
!= NULL
) == (bufp
!= NULL
));
1782 request_buf
= ofpbuf_new(1024);
1783 dpif_linux_dp_to_ofpbuf(request
, request_buf
);
1784 error
= nl_sock_transact(genl_sock
, request_buf
, bufp
);
1785 ofpbuf_delete(request_buf
);
1789 error
= dpif_linux_dp_from_ofpbuf(reply
, *bufp
);
1792 dpif_linux_dp_init(reply
);
1793 ofpbuf_delete(*bufp
);
1800 /* Obtains information about 'dpif_' and stores it into '*reply' and '*bufp'.
1801 * The caller must free '*bufp' when the reply is no longer needed ('reply'
1802 * will contain pointers into '*bufp'). */
1804 dpif_linux_dp_get(const struct dpif
*dpif_
, struct dpif_linux_dp
*reply
,
1805 struct ofpbuf
**bufp
)
1807 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
1808 struct dpif_linux_dp request
;
1810 dpif_linux_dp_init(&request
);
1811 request
.cmd
= OVS_DP_CMD_GET
;
1812 request
.dp_ifindex
= dpif
->dp_ifindex
;
1814 return dpif_linux_dp_transact(&request
, reply
, bufp
);
1817 /* Parses the contents of 'buf', which contains a "struct ovs_header" followed
1818 * by Netlink attributes, into 'flow'. Returns 0 if successful, otherwise a
1819 * positive errno value.
1821 * 'flow' will contain pointers into 'buf', so the caller should not free 'buf'
1822 * while 'flow' is still in use. */
1824 dpif_linux_flow_from_ofpbuf(struct dpif_linux_flow
*flow
,
1825 const struct ofpbuf
*buf
)
1827 static const struct nl_policy ovs_flow_policy
[] = {
1828 [OVS_FLOW_ATTR_KEY
] = { .type
= NL_A_NESTED
},
1829 [OVS_FLOW_ATTR_ACTIONS
] = { .type
= NL_A_NESTED
, .optional
= true },
1830 [OVS_FLOW_ATTR_STATS
] = { NL_POLICY_FOR(struct ovs_flow_stats
),
1832 [OVS_FLOW_ATTR_TCP_FLAGS
] = { .type
= NL_A_U8
, .optional
= true },
1833 [OVS_FLOW_ATTR_USED
] = { .type
= NL_A_U64
, .optional
= true },
1834 /* The kernel never uses OVS_FLOW_ATTR_CLEAR. */
1837 struct nlattr
*a
[ARRAY_SIZE(ovs_flow_policy
)];
1838 struct ovs_header
*ovs_header
;
1839 struct nlmsghdr
*nlmsg
;
1840 struct genlmsghdr
*genl
;
1843 dpif_linux_flow_init(flow
);
1845 ofpbuf_use_const(&b
, buf
->data
, buf
->size
);
1846 nlmsg
= ofpbuf_try_pull(&b
, sizeof *nlmsg
);
1847 genl
= ofpbuf_try_pull(&b
, sizeof *genl
);
1848 ovs_header
= ofpbuf_try_pull(&b
, sizeof *ovs_header
);
1849 if (!nlmsg
|| !genl
|| !ovs_header
1850 || nlmsg
->nlmsg_type
!= ovs_flow_family
1851 || !nl_policy_parse(&b
, 0, ovs_flow_policy
, a
,
1852 ARRAY_SIZE(ovs_flow_policy
))) {
1856 flow
->nlmsg_flags
= nlmsg
->nlmsg_flags
;
1857 flow
->dp_ifindex
= ovs_header
->dp_ifindex
;
1858 flow
->key
= nl_attr_get(a
[OVS_FLOW_ATTR_KEY
]);
1859 flow
->key_len
= nl_attr_get_size(a
[OVS_FLOW_ATTR_KEY
]);
1860 if (a
[OVS_FLOW_ATTR_ACTIONS
]) {
1861 flow
->actions
= nl_attr_get(a
[OVS_FLOW_ATTR_ACTIONS
]);
1862 flow
->actions_len
= nl_attr_get_size(a
[OVS_FLOW_ATTR_ACTIONS
]);
1864 if (a
[OVS_FLOW_ATTR_STATS
]) {
1865 flow
->stats
= nl_attr_get(a
[OVS_FLOW_ATTR_STATS
]);
1867 if (a
[OVS_FLOW_ATTR_TCP_FLAGS
]) {
1868 flow
->tcp_flags
= nl_attr_get(a
[OVS_FLOW_ATTR_TCP_FLAGS
]);
1870 if (a
[OVS_FLOW_ATTR_USED
]) {
1871 flow
->used
= nl_attr_get(a
[OVS_FLOW_ATTR_USED
]);
1876 /* Appends to 'buf' (which must initially be empty) a "struct ovs_header"
1877 * followed by Netlink attributes corresponding to 'flow'. */
1879 dpif_linux_flow_to_ofpbuf(const struct dpif_linux_flow
*flow
,
1882 struct ovs_header
*ovs_header
;
1884 nl_msg_put_genlmsghdr(buf
, 0, ovs_flow_family
,
1885 NLM_F_REQUEST
| flow
->nlmsg_flags
,
1886 flow
->cmd
, OVS_FLOW_VERSION
);
1888 ovs_header
= ofpbuf_put_uninit(buf
, sizeof *ovs_header
);
1889 ovs_header
->dp_ifindex
= flow
->dp_ifindex
;
1891 if (flow
->key_len
) {
1892 nl_msg_put_unspec(buf
, OVS_FLOW_ATTR_KEY
, flow
->key
, flow
->key_len
);
1895 if (flow
->actions
|| flow
->actions_len
) {
1896 nl_msg_put_unspec(buf
, OVS_FLOW_ATTR_ACTIONS
,
1897 flow
->actions
, flow
->actions_len
);
1900 /* We never need to send these to the kernel. */
1901 ovs_assert(!flow
->stats
);
1902 ovs_assert(!flow
->tcp_flags
);
1903 ovs_assert(!flow
->used
);
1906 nl_msg_put_flag(buf
, OVS_FLOW_ATTR_CLEAR
);
1910 /* Clears 'flow' to "empty" values. */
1912 dpif_linux_flow_init(struct dpif_linux_flow
*flow
)
1914 memset(flow
, 0, sizeof *flow
);
1917 /* Executes 'request' in the kernel datapath. If the command fails, returns a
1918 * positive errno value. Otherwise, if 'reply' and 'bufp' are null, returns 0
1919 * without doing anything else. If 'reply' and 'bufp' are nonnull, then the
1920 * result of the command is expected to be a flow also, which is decoded and
1921 * stored in '*reply' and '*bufp'. The caller must free '*bufp' when the reply
1922 * is no longer needed ('reply' will contain pointers into '*bufp'). */
1924 dpif_linux_flow_transact(struct dpif_linux_flow
*request
,
1925 struct dpif_linux_flow
*reply
, struct ofpbuf
**bufp
)
1927 struct ofpbuf
*request_buf
;
1930 ovs_assert((reply
!= NULL
) == (bufp
!= NULL
));
1933 request
->nlmsg_flags
|= NLM_F_ECHO
;
1936 request_buf
= ofpbuf_new(1024);
1937 dpif_linux_flow_to_ofpbuf(request
, request_buf
);
1938 error
= nl_sock_transact(genl_sock
, request_buf
, bufp
);
1939 ofpbuf_delete(request_buf
);
1943 error
= dpif_linux_flow_from_ofpbuf(reply
, *bufp
);
1946 dpif_linux_flow_init(reply
);
1947 ofpbuf_delete(*bufp
);
1955 dpif_linux_flow_get_stats(const struct dpif_linux_flow
*flow
,
1956 struct dpif_flow_stats
*stats
)
1959 stats
->n_packets
= get_unaligned_u64(&flow
->stats
->n_packets
);
1960 stats
->n_bytes
= get_unaligned_u64(&flow
->stats
->n_bytes
);
1962 stats
->n_packets
= 0;
1965 stats
->used
= flow
->used
? get_32aligned_u64(flow
->used
) : 0;
1966 stats
->tcp_flags
= flow
->tcp_flags
? *flow
->tcp_flags
: 0;
1969 /* Logs information about a packet that was recently lost in 'ch' (in
1972 report_loss(struct dpif
*dpif_
, struct dpif_channel
*ch
)
1974 struct dpif_linux
*dpif
= dpif_linux_cast(dpif_
);
1975 static struct vlog_rate_limit rl
= VLOG_RATE_LIMIT_INIT(5, 5);
1978 if (VLOG_DROP_WARN(&rl
)) {
1983 if (ch
->last_poll
!= LLONG_MIN
) {
1984 ds_put_format(&s
, " (last polled %lld ms ago)",
1985 time_msec() - ch
->last_poll
);
1988 VLOG_WARN("%s: lost packet on channel %td%s",
1989 dpif_name(dpif_
), ch
- dpif
->channels
, ds_cstr(&s
));