2 * Copyright (c) 2009, 2010 Nicira Networks.
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.
21 #include <arpa/inet.h>
23 #include <linux/if_tun.h>
25 #include <linux/types.h>
26 #include <linux/ethtool.h>
27 #include <linux/pkt_sched.h>
28 #include <linux/rtnetlink.h>
29 #include <linux/sockios.h>
30 #include <linux/version.h>
31 #include <sys/types.h>
32 #include <sys/ioctl.h>
33 #include <sys/socket.h>
34 #include <netpacket/packet.h>
35 #include <net/ethernet.h>
37 #include <linux/if_tunnel.h>
38 #include <net/if_arp.h>
39 #include <net/if_packet.h>
40 #include <net/route.h>
41 #include <netinet/in.h>
48 #include "dynamic-string.h"
49 #include "fatal-signal.h"
50 #include "netdev-provider.h"
53 #include "openflow/openflow.h"
54 #include "openvswitch/internal_dev.h"
55 #include "openvswitch/gre.h"
57 #include "poll-loop.h"
58 #include "rtnetlink.h"
59 #include "socket-util.h"
63 #define THIS_MODULE VLM_netdev_linux
66 /* These were introduced in Linux 2.6.14, so they might be missing if we have
68 #ifndef ADVERTISED_Pause
69 #define ADVERTISED_Pause (1 << 13)
71 #ifndef ADVERTISED_Asym_Pause
72 #define ADVERTISED_Asym_Pause (1 << 14)
75 static struct rtnetlink_notifier netdev_linux_cache_notifier;
76 static int cache_notifier_refcount;
79 VALID_IFINDEX = 1 << 0,
80 VALID_ETHERADDR = 1 << 1,
84 VALID_CARRIER = 1 << 5,
85 VALID_IS_PSEUDO = 1 << 6, /* Represents is_internal and is_tap. */
86 VALID_POLICING = 1 << 7
93 struct netdev_dev_linux {
94 struct netdev_dev netdev_dev;
96 struct shash_node *shash_node;
97 unsigned int cache_valid;
99 /* The following are figured out "on demand" only. They are only valid
100 * when the corresponding VALID_* bit in 'cache_valid' is set. */
102 uint8_t etheraddr[ETH_ADDR_LEN];
103 struct in_addr address, netmask;
107 bool is_internal; /* Is this an openvswitch internal device? */
108 bool is_tap; /* Is this a tuntap device? */
109 uint32_t kbits_rate; /* Policing data. */
110 uint32_t kbits_burst;
113 struct tap_state tap;
117 struct netdev_linux {
118 struct netdev netdev;
122 /* An AF_INET socket (used for ioctl operations). */
123 static int af_inet_sock = -1;
125 struct netdev_linux_notifier {
126 struct netdev_notifier notifier;
130 static struct shash netdev_linux_notifiers =
131 SHASH_INITIALIZER(&netdev_linux_notifiers);
132 static struct rtnetlink_notifier netdev_linux_poll_notifier;
134 /* This is set pretty low because we probably won't learn anything from the
135 * additional log messages. */
136 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
138 static int netdev_linux_init(void);
140 static int netdev_linux_do_ethtool(const char *name, struct ethtool_cmd *,
141 int cmd, const char *cmd_name);
142 static int netdev_linux_do_ioctl(const char *name, struct ifreq *, int cmd,
143 const char *cmd_name);
144 static int netdev_linux_get_ipv4(const struct netdev *, struct in_addr *,
145 int cmd, const char *cmd_name);
146 static int get_flags(const struct netdev *, int *flagsp);
147 static int set_flags(struct netdev *, int flags);
148 static int do_get_ifindex(const char *netdev_name);
149 static int get_ifindex(const struct netdev *, int *ifindexp);
150 static int do_set_addr(struct netdev *netdev,
151 int ioctl_nr, const char *ioctl_name,
152 struct in_addr addr);
153 static int get_etheraddr(const char *netdev_name, uint8_t ea[ETH_ADDR_LEN]);
154 static int set_etheraddr(const char *netdev_name, int hwaddr_family,
155 const uint8_t[ETH_ADDR_LEN]);
156 static int get_stats_via_netlink(int ifindex, struct netdev_stats *stats);
157 static int get_stats_via_proc(const char *netdev_name, struct netdev_stats *stats);
158 static int get_rtnl_sock(struct nl_sock **);
161 is_netdev_linux_class(const struct netdev_class *netdev_class)
163 return netdev_class->init == netdev_linux_init;
166 static struct netdev_dev_linux *
167 netdev_dev_linux_cast(const struct netdev_dev *netdev_dev)
169 const struct netdev_class *netdev_class = netdev_dev_get_class(netdev_dev);
170 assert(is_netdev_linux_class(netdev_class));
172 return CONTAINER_OF(netdev_dev, struct netdev_dev_linux, netdev_dev);
175 static struct netdev_linux *
176 netdev_linux_cast(const struct netdev *netdev)
178 struct netdev_dev *netdev_dev = netdev_get_dev(netdev);
179 const struct netdev_class *netdev_class = netdev_dev_get_class(netdev_dev);
180 assert(is_netdev_linux_class(netdev_class));
182 return CONTAINER_OF(netdev, struct netdev_linux, netdev);
186 netdev_linux_init(void)
188 static int status = -1;
190 af_inet_sock = socket(AF_INET, SOCK_DGRAM, 0);
191 status = af_inet_sock >= 0 ? 0 : errno;
193 VLOG_ERR("failed to create inet socket: %s", strerror(status));
200 netdev_linux_run(void)
202 rtnetlink_notifier_run();
206 netdev_linux_wait(void)
208 rtnetlink_notifier_wait();
212 netdev_linux_cache_cb(const struct rtnetlink_change *change,
213 void *aux OVS_UNUSED)
215 struct netdev_dev_linux *dev;
217 struct netdev_dev *base_dev = netdev_dev_from_name(change->ifname);
219 const struct netdev_class *netdev_class =
220 netdev_dev_get_class(base_dev);
222 if (is_netdev_linux_class(netdev_class)) {
223 dev = netdev_dev_linux_cast(base_dev);
224 dev->cache_valid = 0;
228 struct shash device_shash;
229 struct shash_node *node;
231 shash_init(&device_shash);
232 netdev_dev_get_devices(&netdev_linux_class, &device_shash);
233 SHASH_FOR_EACH (node, &device_shash) {
235 dev->cache_valid = 0;
237 shash_destroy(&device_shash);
241 /* Creates the netdev device of 'type' with 'name'. */
243 netdev_linux_create_system(const char *name, const char *type OVS_UNUSED,
244 const struct shash *args, struct netdev_dev **netdev_devp)
246 struct netdev_dev_linux *netdev_dev;
249 if (!shash_is_empty(args)) {
250 VLOG_WARN("%s: arguments for system devices should be empty", name);
253 if (!cache_notifier_refcount) {
254 error = rtnetlink_notifier_register(&netdev_linux_cache_notifier,
255 netdev_linux_cache_cb, NULL);
260 cache_notifier_refcount++;
262 netdev_dev = xzalloc(sizeof *netdev_dev);
263 netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_linux_class);
265 *netdev_devp = &netdev_dev->netdev_dev;
269 /* For most types of netdevs we open the device for each call of
270 * netdev_open(). However, this is not the case with tap devices,
271 * since it is only possible to open the device once. In this
272 * situation we share a single file descriptor, and consequently
273 * buffers, across all readers. Therefore once data is read it will
274 * be unavailable to other reads for tap devices. */
276 netdev_linux_create_tap(const char *name, const char *type OVS_UNUSED,
277 const struct shash *args, struct netdev_dev **netdev_devp)
279 struct netdev_dev_linux *netdev_dev;
280 struct tap_state *state;
281 static const char tap_dev[] = "/dev/net/tun";
285 if (!shash_is_empty(args)) {
286 VLOG_WARN("%s: arguments for TAP devices should be empty", name);
289 netdev_dev = xzalloc(sizeof *netdev_dev);
290 state = &netdev_dev->state.tap;
292 /* Open tap device. */
293 state->fd = open(tap_dev, O_RDWR);
296 VLOG_WARN("opening \"%s\" failed: %s", tap_dev, strerror(error));
300 /* Create tap device. */
301 ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
302 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
303 if (ioctl(state->fd, TUNSETIFF, &ifr) == -1) {
304 VLOG_WARN("%s: creating tap device failed: %s", name,
310 /* Make non-blocking. */
311 error = set_nonblocking(state->fd);
316 netdev_dev_init(&netdev_dev->netdev_dev, name, &netdev_tap_class);
317 *netdev_devp = &netdev_dev->netdev_dev;
326 destroy_tap(struct netdev_dev_linux *netdev_dev)
328 struct tap_state *state = &netdev_dev->state.tap;
330 if (state->fd >= 0) {
335 /* Destroys the netdev device 'netdev_dev_'. */
337 netdev_linux_destroy(struct netdev_dev *netdev_dev_)
339 struct netdev_dev_linux *netdev_dev = netdev_dev_linux_cast(netdev_dev_);
340 const char *type = netdev_dev_get_type(netdev_dev_);
342 if (!strcmp(type, "system")) {
343 cache_notifier_refcount--;
345 if (!cache_notifier_refcount) {
346 rtnetlink_notifier_unregister(&netdev_linux_cache_notifier);
348 } else if (!strcmp(type, "tap")) {
349 destroy_tap(netdev_dev);
356 netdev_linux_open(struct netdev_dev *netdev_dev_, int ethertype,
357 struct netdev **netdevp)
359 struct netdev_dev_linux *netdev_dev = netdev_dev_linux_cast(netdev_dev_);
360 struct netdev_linux *netdev;
361 enum netdev_flags flags;
364 /* Allocate network device. */
365 netdev = xzalloc(sizeof *netdev);
367 netdev_init(&netdev->netdev, netdev_dev_);
369 error = netdev_get_flags(&netdev->netdev, &flags);
370 if (error == ENODEV) {
374 if (!strcmp(netdev_dev_get_type(netdev_dev_), "tap")) {
375 netdev->fd = netdev_dev->state.tap.fd;
376 } else if (ethertype != NETDEV_ETH_TYPE_NONE) {
377 struct sockaddr_ll sll;
381 /* Create file descriptor. */
382 protocol = (ethertype == NETDEV_ETH_TYPE_ANY ? ETH_P_ALL
383 : ethertype == NETDEV_ETH_TYPE_802_2 ? ETH_P_802_2
385 netdev->fd = socket(PF_PACKET, SOCK_RAW, htons(protocol));
386 if (netdev->fd < 0) {
391 /* Set non-blocking mode. */
392 error = set_nonblocking(netdev->fd);
397 /* Get ethernet device index. */
398 error = get_ifindex(&netdev->netdev, &ifindex);
403 /* Bind to specific ethernet device. */
404 memset(&sll, 0, sizeof sll);
405 sll.sll_family = AF_PACKET;
406 sll.sll_ifindex = ifindex;
408 (struct sockaddr *) &sll, sizeof sll) < 0) {
410 VLOG_ERR("bind to %s failed: %s", netdev_dev_get_name(netdev_dev_),
415 /* Between the socket() and bind() calls above, the socket receives all
416 * packets of the requested type on all system interfaces. We do not
417 * want to receive that data, but there is no way to avoid it. So we
418 * must now drain out the receive queue. */
419 error = drain_rcvbuf(netdev->fd);
425 *netdevp = &netdev->netdev;
429 netdev_uninit(&netdev->netdev, true);
433 /* Closes and destroys 'netdev'. */
435 netdev_linux_close(struct netdev *netdev_)
437 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
439 if (netdev->fd > 0 && strcmp(netdev_get_type(netdev_), "tap")) {
445 /* Initializes 'svec' with a list of the names of all known network devices. */
447 netdev_linux_enumerate(struct svec *svec)
449 struct if_nameindex *names;
451 names = if_nameindex();
455 for (i = 0; names[i].if_name != NULL; i++) {
456 svec_add(svec, names[i].if_name);
458 if_freenameindex(names);
461 VLOG_WARN("could not obtain list of network device names: %s",
468 netdev_linux_recv(struct netdev *netdev_, void *data, size_t size)
470 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
472 if (netdev->fd < 0) {
473 /* Device was opened with NETDEV_ETH_TYPE_NONE. */
478 ssize_t retval = read(netdev->fd, data, size);
481 } else if (errno != EINTR) {
482 if (errno != EAGAIN) {
483 VLOG_WARN_RL(&rl, "error receiving Ethernet packet on %s: %s",
484 strerror(errno), netdev_get_name(netdev_));
491 /* Registers with the poll loop to wake up from the next call to poll_block()
492 * when a packet is ready to be received with netdev_recv() on 'netdev'. */
494 netdev_linux_recv_wait(struct netdev *netdev_)
496 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
497 if (netdev->fd >= 0) {
498 poll_fd_wait(netdev->fd, POLLIN);
502 /* Discards all packets waiting to be received from 'netdev'. */
504 netdev_linux_drain(struct netdev *netdev_)
506 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
507 if (netdev->fd < 0) {
509 } else if (!strcmp(netdev_get_type(netdev_), "tap")) {
511 int error = netdev_linux_do_ioctl(netdev_get_name(netdev_), &ifr,
512 SIOCGIFTXQLEN, "SIOCGIFTXQLEN");
516 drain_fd(netdev->fd, ifr.ifr_qlen);
519 return drain_rcvbuf(netdev->fd);
523 /* Sends 'buffer' on 'netdev'. Returns 0 if successful, otherwise a positive
524 * errno value. Returns EAGAIN without blocking if the packet cannot be queued
525 * immediately. Returns EMSGSIZE if a partial packet was transmitted or if
526 * the packet is too big or too small to transmit on the device.
528 * The caller retains ownership of 'buffer' in all cases.
530 * The kernel maintains a packet transmission queue, so the caller is not
531 * expected to do additional queuing of packets. */
533 netdev_linux_send(struct netdev *netdev_, const void *data, size_t size)
535 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
537 /* XXX should support sending even if 'ethertype' was NETDEV_ETH_TYPE_NONE.
539 if (netdev->fd < 0) {
544 ssize_t retval = write(netdev->fd, data, size);
546 /* The Linux AF_PACKET implementation never blocks waiting for room
547 * for packets, instead returning ENOBUFS. Translate this into
548 * EAGAIN for the caller. */
549 if (errno == ENOBUFS) {
551 } else if (errno == EINTR) {
553 } else if (errno != EAGAIN) {
554 VLOG_WARN_RL(&rl, "error sending Ethernet packet on %s: %s",
555 netdev_get_name(netdev_), strerror(errno));
558 } else if (retval != size) {
559 VLOG_WARN_RL(&rl, "sent partial Ethernet packet (%zd bytes of "
560 "%zu) on %s", retval, size, netdev_get_name(netdev_));
568 /* Registers with the poll loop to wake up from the next call to poll_block()
569 * when the packet transmission queue has sufficient room to transmit a packet
570 * with netdev_send().
572 * The kernel maintains a packet transmission queue, so the client is not
573 * expected to do additional queuing of packets. Thus, this function is
574 * unlikely to ever be used. It is included for completeness. */
576 netdev_linux_send_wait(struct netdev *netdev_)
578 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
579 if (netdev->fd < 0) {
581 } else if (strcmp(netdev_get_type(netdev_), "tap")) {
582 poll_fd_wait(netdev->fd, POLLOUT);
584 /* TAP device always accepts packets.*/
585 poll_immediate_wake();
589 /* Attempts to set 'netdev''s MAC address to 'mac'. Returns 0 if successful,
590 * otherwise a positive errno value. */
592 netdev_linux_set_etheraddr(struct netdev *netdev_,
593 const uint8_t mac[ETH_ADDR_LEN])
595 struct netdev_dev_linux *netdev_dev =
596 netdev_dev_linux_cast(netdev_get_dev(netdev_));
599 if (!(netdev_dev->cache_valid & VALID_ETHERADDR)
600 || !eth_addr_equals(netdev_dev->etheraddr, mac)) {
601 error = set_etheraddr(netdev_get_name(netdev_), ARPHRD_ETHER, mac);
603 netdev_dev->cache_valid |= VALID_ETHERADDR;
604 memcpy(netdev_dev->etheraddr, mac, ETH_ADDR_LEN);
612 /* Returns a pointer to 'netdev''s MAC address. The caller must not modify or
613 * free the returned buffer. */
615 netdev_linux_get_etheraddr(const struct netdev *netdev_,
616 uint8_t mac[ETH_ADDR_LEN])
618 struct netdev_dev_linux *netdev_dev =
619 netdev_dev_linux_cast(netdev_get_dev(netdev_));
620 if (!(netdev_dev->cache_valid & VALID_ETHERADDR)) {
621 int error = get_etheraddr(netdev_get_name(netdev_),
622 netdev_dev->etheraddr);
626 netdev_dev->cache_valid |= VALID_ETHERADDR;
628 memcpy(mac, netdev_dev->etheraddr, ETH_ADDR_LEN);
632 /* Returns the maximum size of transmitted (and received) packets on 'netdev',
633 * in bytes, not including the hardware header; thus, this is typically 1500
634 * bytes for Ethernet devices. */
636 netdev_linux_get_mtu(const struct netdev *netdev_, int *mtup)
638 struct netdev_dev_linux *netdev_dev =
639 netdev_dev_linux_cast(netdev_get_dev(netdev_));
640 if (!(netdev_dev->cache_valid & VALID_MTU)) {
644 error = netdev_linux_do_ioctl(netdev_get_name(netdev_), &ifr,
645 SIOCGIFMTU, "SIOCGIFMTU");
649 netdev_dev->mtu = ifr.ifr_mtu;
650 netdev_dev->cache_valid |= VALID_MTU;
652 *mtup = netdev_dev->mtu;
656 /* Returns the ifindex of 'netdev', if successful, as a positive number.
657 * On failure, returns a negative errno value. */
659 netdev_linux_get_ifindex(const struct netdev *netdev)
663 error = get_ifindex(netdev, &ifindex);
664 return error ? -error : ifindex;
668 netdev_linux_get_carrier(const struct netdev *netdev_, bool *carrier)
670 struct netdev_dev_linux *netdev_dev =
671 netdev_dev_linux_cast(netdev_get_dev(netdev_));
676 if (!(netdev_dev->cache_valid & VALID_CARRIER)) {
680 fn = xasprintf("/sys/class/net/%s/carrier",
681 netdev_get_name(netdev_));
682 fd = open(fn, O_RDONLY);
685 VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(error));
689 retval = read(fd, line, sizeof line);
692 if (error == EINVAL) {
693 /* This is the normal return value when we try to check carrier
694 * if the network device is not up. */
696 VLOG_WARN_RL(&rl, "%s: read failed: %s", fn, strerror(error));
699 } else if (retval == 0) {
701 VLOG_WARN_RL(&rl, "%s: unexpected end of file", fn);
705 if (line[0] != '0' && line[0] != '1') {
707 VLOG_WARN_RL(&rl, "%s: value is %c (expected 0 or 1)",
711 netdev_dev->carrier = line[0] != '0';
712 netdev_dev->cache_valid |= VALID_CARRIER;
714 *carrier = netdev_dev->carrier;
725 /* Check whether we can we use RTM_GETLINK to get network device statistics.
726 * In pre-2.6.19 kernels, this was only available if wireless extensions were
729 check_for_working_netlink_stats(void)
731 /* Decide on the netdev_get_stats() implementation to use. Netlink is
732 * preferable, so if that works, we'll use it. */
733 int ifindex = do_get_ifindex("lo");
735 VLOG_WARN("failed to get ifindex for lo, "
736 "obtaining netdev stats from proc");
739 struct netdev_stats stats;
740 int error = get_stats_via_netlink(ifindex, &stats);
742 VLOG_DBG("obtaining netdev stats via rtnetlink");
745 VLOG_INFO("RTM_GETLINK failed (%s), obtaining netdev stats "
746 "via proc (you are probably running a pre-2.6.19 "
747 "kernel)", strerror(error));
753 /* Brings the 'is_internal' and 'is_tap' members of 'netdev_dev' up-to-date. */
755 netdev_linux_update_is_pseudo(struct netdev_dev_linux *netdev_dev)
757 if (!(netdev_dev->cache_valid & VALID_IS_PSEUDO)) {
758 const char *name = netdev_dev_get_name(&netdev_dev->netdev_dev);
759 const char *type = netdev_dev_get_type(&netdev_dev->netdev_dev);
761 netdev_dev->is_tap = !strcmp(type, "tap");
762 netdev_dev->is_internal = false;
763 if (!netdev_dev->is_tap) {
764 struct ethtool_drvinfo drvinfo;
767 memset(&drvinfo, 0, sizeof drvinfo);
768 error = netdev_linux_do_ethtool(name,
769 (struct ethtool_cmd *)&drvinfo,
773 if (!error && !strcmp(drvinfo.driver, "openvswitch")) {
774 netdev_dev->is_internal = true;
778 netdev_dev->cache_valid |= VALID_IS_PSEUDO;
783 swap_uint64(uint64_t *a, uint64_t *b)
790 /* Retrieves current device stats for 'netdev'.
792 * XXX All of the members of struct netdev_stats are 64 bits wide, but on
793 * 32-bit architectures the Linux network stats are only 32 bits. */
795 netdev_linux_get_stats(const struct netdev *netdev_,
796 struct netdev_stats *stats)
798 struct netdev_dev_linux *netdev_dev =
799 netdev_dev_linux_cast(netdev_get_dev(netdev_));
800 static int use_netlink_stats = -1;
803 COVERAGE_INC(netdev_get_stats);
805 if (use_netlink_stats < 0) {
806 use_netlink_stats = check_for_working_netlink_stats();
808 if (use_netlink_stats) {
811 error = get_ifindex(netdev_, &ifindex);
813 error = get_stats_via_netlink(ifindex, stats);
816 error = get_stats_via_proc(netdev_get_name(netdev_), stats);
819 /* If this port is an internal port then the transmit and receive stats
820 * will appear to be swapped relative to the other ports since we are the
821 * one sending the data, not a remote computer. For consistency, we swap
823 netdev_linux_update_is_pseudo(netdev_dev);
824 if (!error && (netdev_dev->is_internal || netdev_dev->is_tap)) {
825 swap_uint64(&stats->rx_packets, &stats->tx_packets);
826 swap_uint64(&stats->rx_bytes, &stats->tx_bytes);
827 swap_uint64(&stats->rx_errors, &stats->tx_errors);
828 swap_uint64(&stats->rx_dropped, &stats->tx_dropped);
829 stats->rx_length_errors = 0;
830 stats->rx_over_errors = 0;
831 stats->rx_crc_errors = 0;
832 stats->rx_frame_errors = 0;
833 stats->rx_fifo_errors = 0;
834 stats->rx_missed_errors = 0;
835 stats->tx_aborted_errors = 0;
836 stats->tx_carrier_errors = 0;
837 stats->tx_fifo_errors = 0;
838 stats->tx_heartbeat_errors = 0;
839 stats->tx_window_errors = 0;
846 netdev_linux_set_stats(struct netdev *netdev,
847 const struct netdev_stats *stats)
849 struct netdev_dev_linux *netdev_dev =
850 netdev_dev_linux_cast(netdev_get_dev(netdev));
851 struct internal_dev_stats dp_dev_stats;
854 /* We must reject this call if 'netdev' is not an Open vSwitch internal
855 * port, because the ioctl that we are about to execute is in the "device
856 * private ioctls" range, which means that executing it on a device that
857 * is not the type we expect could do any random thing.
859 * (Amusingly, these ioctl numbers are commented "THESE IOCTLS ARE
860 * _DEPRECATED_ AND WILL DISAPPEAR IN 2.5.X" in linux/sockios.h. I guess
861 * DaveM is a little behind on that.) */
862 netdev_linux_update_is_pseudo(netdev_dev);
863 if (!netdev_dev->is_internal) {
867 /* This actually only sets the *offset* that the dp_dev applies, but in our
868 * usage for fake bond devices the dp_dev never has any traffic of it own
869 * so it has the same effect. */
870 dp_dev_stats.rx_packets = stats->rx_packets;
871 dp_dev_stats.rx_bytes = stats->rx_bytes;
872 dp_dev_stats.tx_packets = stats->tx_packets;
873 dp_dev_stats.tx_bytes = stats->tx_bytes;
874 ifr.ifr_data = (void *) &dp_dev_stats;
875 return netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr,
876 INTERNAL_DEV_SET_STATS,
877 "INTERNAL_DEV_SET_STATS");
880 /* Stores the features supported by 'netdev' into each of '*current',
881 * '*advertised', '*supported', and '*peer' that are non-null. Each value is a
882 * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if
883 * successful, otherwise a positive errno value. */
885 netdev_linux_get_features(struct netdev *netdev,
886 uint32_t *current, uint32_t *advertised,
887 uint32_t *supported, uint32_t *peer)
889 struct ethtool_cmd ecmd;
892 memset(&ecmd, 0, sizeof ecmd);
893 error = netdev_linux_do_ethtool(netdev_get_name(netdev), &ecmd,
894 ETHTOOL_GSET, "ETHTOOL_GSET");
899 /* Supported features. */
901 if (ecmd.supported & SUPPORTED_10baseT_Half) {
902 *supported |= OFPPF_10MB_HD;
904 if (ecmd.supported & SUPPORTED_10baseT_Full) {
905 *supported |= OFPPF_10MB_FD;
907 if (ecmd.supported & SUPPORTED_100baseT_Half) {
908 *supported |= OFPPF_100MB_HD;
910 if (ecmd.supported & SUPPORTED_100baseT_Full) {
911 *supported |= OFPPF_100MB_FD;
913 if (ecmd.supported & SUPPORTED_1000baseT_Half) {
914 *supported |= OFPPF_1GB_HD;
916 if (ecmd.supported & SUPPORTED_1000baseT_Full) {
917 *supported |= OFPPF_1GB_FD;
919 if (ecmd.supported & SUPPORTED_10000baseT_Full) {
920 *supported |= OFPPF_10GB_FD;
922 if (ecmd.supported & SUPPORTED_TP) {
923 *supported |= OFPPF_COPPER;
925 if (ecmd.supported & SUPPORTED_FIBRE) {
926 *supported |= OFPPF_FIBER;
928 if (ecmd.supported & SUPPORTED_Autoneg) {
929 *supported |= OFPPF_AUTONEG;
931 if (ecmd.supported & SUPPORTED_Pause) {
932 *supported |= OFPPF_PAUSE;
934 if (ecmd.supported & SUPPORTED_Asym_Pause) {
935 *supported |= OFPPF_PAUSE_ASYM;
938 /* Advertised features. */
940 if (ecmd.advertising & ADVERTISED_10baseT_Half) {
941 *advertised |= OFPPF_10MB_HD;
943 if (ecmd.advertising & ADVERTISED_10baseT_Full) {
944 *advertised |= OFPPF_10MB_FD;
946 if (ecmd.advertising & ADVERTISED_100baseT_Half) {
947 *advertised |= OFPPF_100MB_HD;
949 if (ecmd.advertising & ADVERTISED_100baseT_Full) {
950 *advertised |= OFPPF_100MB_FD;
952 if (ecmd.advertising & ADVERTISED_1000baseT_Half) {
953 *advertised |= OFPPF_1GB_HD;
955 if (ecmd.advertising & ADVERTISED_1000baseT_Full) {
956 *advertised |= OFPPF_1GB_FD;
958 if (ecmd.advertising & ADVERTISED_10000baseT_Full) {
959 *advertised |= OFPPF_10GB_FD;
961 if (ecmd.advertising & ADVERTISED_TP) {
962 *advertised |= OFPPF_COPPER;
964 if (ecmd.advertising & ADVERTISED_FIBRE) {
965 *advertised |= OFPPF_FIBER;
967 if (ecmd.advertising & ADVERTISED_Autoneg) {
968 *advertised |= OFPPF_AUTONEG;
970 if (ecmd.advertising & ADVERTISED_Pause) {
971 *advertised |= OFPPF_PAUSE;
973 if (ecmd.advertising & ADVERTISED_Asym_Pause) {
974 *advertised |= OFPPF_PAUSE_ASYM;
977 /* Current settings. */
978 if (ecmd.speed == SPEED_10) {
979 *current = ecmd.duplex ? OFPPF_10MB_FD : OFPPF_10MB_HD;
980 } else if (ecmd.speed == SPEED_100) {
981 *current = ecmd.duplex ? OFPPF_100MB_FD : OFPPF_100MB_HD;
982 } else if (ecmd.speed == SPEED_1000) {
983 *current = ecmd.duplex ? OFPPF_1GB_FD : OFPPF_1GB_HD;
984 } else if (ecmd.speed == SPEED_10000) {
985 *current = OFPPF_10GB_FD;
990 if (ecmd.port == PORT_TP) {
991 *current |= OFPPF_COPPER;
992 } else if (ecmd.port == PORT_FIBRE) {
993 *current |= OFPPF_FIBER;
997 *current |= OFPPF_AUTONEG;
1000 /* Peer advertisements. */
1001 *peer = 0; /* XXX */
1006 /* Set the features advertised by 'netdev' to 'advertise'. */
1008 netdev_linux_set_advertisements(struct netdev *netdev, uint32_t advertise)
1010 struct ethtool_cmd ecmd;
1013 memset(&ecmd, 0, sizeof ecmd);
1014 error = netdev_linux_do_ethtool(netdev_get_name(netdev), &ecmd,
1015 ETHTOOL_GSET, "ETHTOOL_GSET");
1020 ecmd.advertising = 0;
1021 if (advertise & OFPPF_10MB_HD) {
1022 ecmd.advertising |= ADVERTISED_10baseT_Half;
1024 if (advertise & OFPPF_10MB_FD) {
1025 ecmd.advertising |= ADVERTISED_10baseT_Full;
1027 if (advertise & OFPPF_100MB_HD) {
1028 ecmd.advertising |= ADVERTISED_100baseT_Half;
1030 if (advertise & OFPPF_100MB_FD) {
1031 ecmd.advertising |= ADVERTISED_100baseT_Full;
1033 if (advertise & OFPPF_1GB_HD) {
1034 ecmd.advertising |= ADVERTISED_1000baseT_Half;
1036 if (advertise & OFPPF_1GB_FD) {
1037 ecmd.advertising |= ADVERTISED_1000baseT_Full;
1039 if (advertise & OFPPF_10GB_FD) {
1040 ecmd.advertising |= ADVERTISED_10000baseT_Full;
1042 if (advertise & OFPPF_COPPER) {
1043 ecmd.advertising |= ADVERTISED_TP;
1045 if (advertise & OFPPF_FIBER) {
1046 ecmd.advertising |= ADVERTISED_FIBRE;
1048 if (advertise & OFPPF_AUTONEG) {
1049 ecmd.advertising |= ADVERTISED_Autoneg;
1051 if (advertise & OFPPF_PAUSE) {
1052 ecmd.advertising |= ADVERTISED_Pause;
1054 if (advertise & OFPPF_PAUSE_ASYM) {
1055 ecmd.advertising |= ADVERTISED_Asym_Pause;
1057 return netdev_linux_do_ethtool(netdev_get_name(netdev), &ecmd,
1058 ETHTOOL_SSET, "ETHTOOL_SSET");
1061 /* If 'netdev_name' is the name of a VLAN network device (e.g. one created with
1062 * vconfig(8)), sets '*vlan_vid' to the VLAN VID associated with that device
1063 * and returns 0. Otherwise returns a errno value (specifically ENOENT if
1064 * 'netdev_name' is the name of a network device that is not a VLAN device) and
1065 * sets '*vlan_vid' to -1. */
1067 netdev_linux_get_vlan_vid(const struct netdev *netdev, int *vlan_vid)
1069 const char *netdev_name = netdev_get_name(netdev);
1070 struct ds line = DS_EMPTY_INITIALIZER;
1071 FILE *stream = NULL;
1075 COVERAGE_INC(netdev_get_vlan_vid);
1076 fn = xasprintf("/proc/net/vlan/%s", netdev_name);
1077 stream = fopen(fn, "r");
1083 if (ds_get_line(&line, stream)) {
1084 if (ferror(stream)) {
1086 VLOG_ERR_RL(&rl, "error reading \"%s\": %s", fn, strerror(errno));
1089 VLOG_ERR_RL(&rl, "unexpected end of file reading \"%s\"", fn);
1094 if (!sscanf(ds_cstr(&line), "%*s VID: %d", vlan_vid)) {
1096 VLOG_ERR_RL(&rl, "parse error reading \"%s\" line 1: \"%s\"",
1097 fn, ds_cstr(&line));
1115 #define POLICE_ADD_CMD "/sbin/tc qdisc add dev %s handle ffff: ingress"
1116 #define POLICE_CONFIG_CMD "/sbin/tc filter add dev %s parent ffff: protocol ip prio 50 u32 match ip src 0.0.0.0/0 police rate %dkbit burst %dk mtu 65535 drop flowid :1"
1118 /* Remove ingress policing from 'netdev'. Returns 0 if successful, otherwise a
1119 * positive errno value.
1121 * This function is equivalent to running
1122 * /sbin/tc qdisc del dev %s handle ffff: ingress
1123 * but it is much, much faster.
1126 netdev_linux_remove_policing(struct netdev *netdev)
1128 struct netdev_dev_linux *netdev_dev =
1129 netdev_dev_linux_cast(netdev_get_dev(netdev));
1130 const char *netdev_name = netdev_get_name(netdev);
1132 struct ofpbuf request;
1133 struct ofpbuf *reply;
1134 struct tcmsg *tcmsg;
1135 struct nl_sock *rtnl_sock;
1139 error = get_ifindex(netdev, &ifindex);
1144 error = get_rtnl_sock(&rtnl_sock);
1149 ofpbuf_init(&request, 0);
1150 nl_msg_put_nlmsghdr(&request, rtnl_sock, sizeof *tcmsg,
1151 RTM_DELQDISC, NLM_F_REQUEST);
1152 tcmsg = ofpbuf_put_zeros(&request, sizeof *tcmsg);
1153 tcmsg->tcm_family = AF_UNSPEC;
1154 tcmsg->tcm_ifindex = ifindex;
1155 tcmsg->tcm_handle = 0xffff0000;
1156 tcmsg->tcm_parent = TC_H_INGRESS;
1157 nl_msg_put_string(&request, TCA_KIND, "ingress");
1158 nl_msg_put_unspec(&request, TCA_OPTIONS, NULL, 0);
1159 error = nl_sock_transact(rtnl_sock, &request, &reply);
1160 ofpbuf_uninit(&request);
1161 ofpbuf_delete(reply);
1162 if (error && error != ENOENT && error != EINVAL) {
1163 VLOG_WARN_RL(&rl, "%s: removing policing failed: %s",
1164 netdev_name, strerror(error));
1168 netdev_dev->kbits_rate = 0;
1169 netdev_dev->kbits_burst = 0;
1170 netdev_dev->cache_valid |= VALID_POLICING;
1174 /* Attempts to set input rate limiting (policing) policy. */
1176 netdev_linux_set_policing(struct netdev *netdev,
1177 uint32_t kbits_rate, uint32_t kbits_burst)
1179 struct netdev_dev_linux *netdev_dev =
1180 netdev_dev_linux_cast(netdev_get_dev(netdev));
1181 const char *netdev_name = netdev_get_name(netdev);
1184 COVERAGE_INC(netdev_set_policing);
1186 kbits_burst = (!kbits_rate ? 0 /* Force to 0 if no rate specified. */
1187 : !kbits_burst ? 1000 /* Default to 1000 kbits if 0. */
1188 : kbits_burst); /* Stick with user-specified value. */
1190 if (netdev_dev->cache_valid & VALID_POLICING
1191 && netdev_dev->kbits_rate == kbits_rate
1192 && netdev_dev->kbits_burst == kbits_burst) {
1193 /* Assume that settings haven't changed since we last set them. */
1197 netdev_linux_remove_policing(netdev);
1199 snprintf(command, sizeof(command), POLICE_ADD_CMD, netdev_name);
1200 if (system(command) != 0) {
1201 VLOG_WARN_RL(&rl, "%s: problem adding policing", netdev_name);
1205 snprintf(command, sizeof(command), POLICE_CONFIG_CMD, netdev_name,
1206 kbits_rate, kbits_burst);
1207 if (system(command) != 0) {
1208 VLOG_WARN_RL(&rl, "%s: problem configuring policing",
1213 netdev_dev->kbits_rate = kbits_rate;
1214 netdev_dev->kbits_burst = kbits_burst;
1215 netdev_dev->cache_valid |= VALID_POLICING;
1222 netdev_linux_get_in4(const struct netdev *netdev_,
1223 struct in_addr *address, struct in_addr *netmask)
1225 struct netdev_dev_linux *netdev_dev =
1226 netdev_dev_linux_cast(netdev_get_dev(netdev_));
1228 if (!(netdev_dev->cache_valid & VALID_IN4)) {
1231 error = netdev_linux_get_ipv4(netdev_, &netdev_dev->address,
1232 SIOCGIFADDR, "SIOCGIFADDR");
1237 error = netdev_linux_get_ipv4(netdev_, &netdev_dev->netmask,
1238 SIOCGIFNETMASK, "SIOCGIFNETMASK");
1243 netdev_dev->cache_valid |= VALID_IN4;
1245 *address = netdev_dev->address;
1246 *netmask = netdev_dev->netmask;
1247 return address->s_addr == INADDR_ANY ? EADDRNOTAVAIL : 0;
1251 netdev_linux_set_in4(struct netdev *netdev_, struct in_addr address,
1252 struct in_addr netmask)
1254 struct netdev_dev_linux *netdev_dev =
1255 netdev_dev_linux_cast(netdev_get_dev(netdev_));
1258 error = do_set_addr(netdev_, SIOCSIFADDR, "SIOCSIFADDR", address);
1260 netdev_dev->cache_valid |= VALID_IN4;
1261 netdev_dev->address = address;
1262 netdev_dev->netmask = netmask;
1263 if (address.s_addr != INADDR_ANY) {
1264 error = do_set_addr(netdev_, SIOCSIFNETMASK,
1265 "SIOCSIFNETMASK", netmask);
1272 parse_if_inet6_line(const char *line,
1273 struct in6_addr *in6, char ifname[16 + 1])
1275 uint8_t *s6 = in6->s6_addr;
1276 #define X8 "%2"SCNx8
1278 " "X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8
1279 "%*x %*x %*x %*x %16s\n",
1280 &s6[0], &s6[1], &s6[2], &s6[3],
1281 &s6[4], &s6[5], &s6[6], &s6[7],
1282 &s6[8], &s6[9], &s6[10], &s6[11],
1283 &s6[12], &s6[13], &s6[14], &s6[15],
1287 /* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address (if
1288 * 'in6' is non-null) and returns true. Otherwise, returns false. */
1290 netdev_linux_get_in6(const struct netdev *netdev_, struct in6_addr *in6)
1292 struct netdev_dev_linux *netdev_dev =
1293 netdev_dev_linux_cast(netdev_get_dev(netdev_));
1294 if (!(netdev_dev->cache_valid & VALID_IN6)) {
1298 netdev_dev->in6 = in6addr_any;
1300 file = fopen("/proc/net/if_inet6", "r");
1302 const char *name = netdev_get_name(netdev_);
1303 while (fgets(line, sizeof line, file)) {
1304 struct in6_addr in6;
1305 char ifname[16 + 1];
1306 if (parse_if_inet6_line(line, &in6, ifname)
1307 && !strcmp(name, ifname))
1309 netdev_dev->in6 = in6;
1315 netdev_dev->cache_valid |= VALID_IN6;
1317 *in6 = netdev_dev->in6;
1322 make_in4_sockaddr(struct sockaddr *sa, struct in_addr addr)
1324 struct sockaddr_in sin;
1325 memset(&sin, 0, sizeof sin);
1326 sin.sin_family = AF_INET;
1327 sin.sin_addr = addr;
1330 memset(sa, 0, sizeof *sa);
1331 memcpy(sa, &sin, sizeof sin);
1335 do_set_addr(struct netdev *netdev,
1336 int ioctl_nr, const char *ioctl_name, struct in_addr addr)
1339 strncpy(ifr.ifr_name, netdev_get_name(netdev), sizeof ifr.ifr_name);
1340 make_in4_sockaddr(&ifr.ifr_addr, addr);
1342 return netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr, ioctl_nr,
1346 /* Adds 'router' as a default IP gateway. */
1348 netdev_linux_add_router(struct netdev *netdev OVS_UNUSED, struct in_addr router)
1350 struct in_addr any = { INADDR_ANY };
1354 memset(&rt, 0, sizeof rt);
1355 make_in4_sockaddr(&rt.rt_dst, any);
1356 make_in4_sockaddr(&rt.rt_gateway, router);
1357 make_in4_sockaddr(&rt.rt_genmask, any);
1358 rt.rt_flags = RTF_UP | RTF_GATEWAY;
1359 COVERAGE_INC(netdev_add_router);
1360 error = ioctl(af_inet_sock, SIOCADDRT, &rt) < 0 ? errno : 0;
1362 VLOG_WARN("ioctl(SIOCADDRT): %s", strerror(error));
1368 netdev_linux_get_next_hop(const struct in_addr *host, struct in_addr *next_hop,
1371 static const char fn[] = "/proc/net/route";
1376 *netdev_name = NULL;
1377 stream = fopen(fn, "r");
1378 if (stream == NULL) {
1379 VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(errno));
1384 while (fgets(line, sizeof line, stream)) {
1387 uint32_t dest, gateway, mask;
1388 int refcnt, metric, mtu;
1389 unsigned int flags, use, window, irtt;
1392 "%16s %"SCNx32" %"SCNx32" %04X %d %u %d %"SCNx32
1394 iface, &dest, &gateway, &flags, &refcnt,
1395 &use, &metric, &mask, &mtu, &window, &irtt) != 11) {
1397 VLOG_WARN_RL(&rl, "%s: could not parse line %d: %s",
1401 if (!(flags & RTF_UP)) {
1402 /* Skip routes that aren't up. */
1406 /* The output of 'dest', 'mask', and 'gateway' were given in
1407 * network byte order, so we don't need need any endian
1408 * conversions here. */
1409 if ((dest & mask) == (host->s_addr & mask)) {
1411 /* The host is directly reachable. */
1412 next_hop->s_addr = 0;
1414 /* To reach the host, we must go through a gateway. */
1415 next_hop->s_addr = gateway;
1417 *netdev_name = xstrdup(iface);
1428 /* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be
1429 * successfully retrieved, it stores the corresponding MAC address in 'mac' and
1430 * returns 0. Otherwise, it returns a positive errno value; in particular,
1431 * ENXIO indicates that there is not ARP table entry for 'ip' on 'netdev'. */
1433 netdev_linux_arp_lookup(const struct netdev *netdev,
1434 uint32_t ip, uint8_t mac[ETH_ADDR_LEN])
1437 struct sockaddr_in sin;
1440 memset(&r, 0, sizeof r);
1441 sin.sin_family = AF_INET;
1442 sin.sin_addr.s_addr = ip;
1444 memcpy(&r.arp_pa, &sin, sizeof sin);
1445 r.arp_ha.sa_family = ARPHRD_ETHER;
1447 strncpy(r.arp_dev, netdev_get_name(netdev), sizeof r.arp_dev);
1448 COVERAGE_INC(netdev_arp_lookup);
1449 retval = ioctl(af_inet_sock, SIOCGARP, &r) < 0 ? errno : 0;
1451 memcpy(mac, r.arp_ha.sa_data, ETH_ADDR_LEN);
1452 } else if (retval != ENXIO) {
1453 VLOG_WARN_RL(&rl, "%s: could not look up ARP entry for "IP_FMT": %s",
1454 netdev_get_name(netdev), IP_ARGS(&ip), strerror(retval));
1460 nd_to_iff_flags(enum netdev_flags nd)
1463 if (nd & NETDEV_UP) {
1466 if (nd & NETDEV_PROMISC) {
1473 iff_to_nd_flags(int iff)
1475 enum netdev_flags nd = 0;
1479 if (iff & IFF_PROMISC) {
1480 nd |= NETDEV_PROMISC;
1486 netdev_linux_update_flags(struct netdev *netdev, enum netdev_flags off,
1487 enum netdev_flags on, enum netdev_flags *old_flagsp)
1489 int old_flags, new_flags;
1492 error = get_flags(netdev, &old_flags);
1494 *old_flagsp = iff_to_nd_flags(old_flags);
1495 new_flags = (old_flags & ~nd_to_iff_flags(off)) | nd_to_iff_flags(on);
1496 if (new_flags != old_flags) {
1497 error = set_flags(netdev, new_flags);
1504 poll_notify(struct list *list)
1506 struct netdev_linux_notifier *notifier;
1507 LIST_FOR_EACH (notifier, struct netdev_linux_notifier, node, list) {
1508 struct netdev_notifier *n = ¬ifier->notifier;
1514 netdev_linux_poll_cb(const struct rtnetlink_change *change,
1515 void *aux OVS_UNUSED)
1518 struct list *list = shash_find_data(&netdev_linux_notifiers,
1524 struct shash_node *node;
1525 SHASH_FOR_EACH (node, &netdev_linux_notifiers) {
1526 poll_notify(node->data);
1532 netdev_linux_poll_add(struct netdev *netdev,
1533 void (*cb)(struct netdev_notifier *), void *aux,
1534 struct netdev_notifier **notifierp)
1536 const char *netdev_name = netdev_get_name(netdev);
1537 struct netdev_linux_notifier *notifier;
1540 if (shash_is_empty(&netdev_linux_notifiers)) {
1541 int error = rtnetlink_notifier_register(&netdev_linux_poll_notifier,
1542 netdev_linux_poll_cb, NULL);
1548 list = shash_find_data(&netdev_linux_notifiers, netdev_name);
1550 list = xmalloc(sizeof *list);
1552 shash_add(&netdev_linux_notifiers, netdev_name, list);
1555 notifier = xmalloc(sizeof *notifier);
1556 netdev_notifier_init(¬ifier->notifier, netdev, cb, aux);
1557 list_push_back(list, ¬ifier->node);
1558 *notifierp = ¬ifier->notifier;
1563 netdev_linux_poll_remove(struct netdev_notifier *notifier_)
1565 struct netdev_linux_notifier *notifier =
1566 CONTAINER_OF(notifier_, struct netdev_linux_notifier, notifier);
1569 /* Remove 'notifier' from its list. */
1570 list = list_remove(¬ifier->node);
1571 if (list_is_empty(list)) {
1572 /* The list is now empty. Remove it from the hash and free it. */
1573 const char *netdev_name = netdev_get_name(notifier->notifier.netdev);
1574 shash_delete(&netdev_linux_notifiers,
1575 shash_find(&netdev_linux_notifiers, netdev_name));
1580 /* If that was the last notifier, unregister. */
1581 if (shash_is_empty(&netdev_linux_notifiers)) {
1582 rtnetlink_notifier_unregister(&netdev_linux_poll_notifier);
1586 const struct netdev_class netdev_linux_class = {
1593 netdev_linux_create_system,
1594 netdev_linux_destroy,
1595 NULL, /* reconfigure */
1600 netdev_linux_enumerate,
1603 netdev_linux_recv_wait,
1607 netdev_linux_send_wait,
1609 netdev_linux_set_etheraddr,
1610 netdev_linux_get_etheraddr,
1611 netdev_linux_get_mtu,
1612 netdev_linux_get_ifindex,
1613 netdev_linux_get_carrier,
1614 netdev_linux_get_stats,
1615 netdev_linux_set_stats,
1617 netdev_linux_get_features,
1618 netdev_linux_set_advertisements,
1619 netdev_linux_get_vlan_vid,
1620 netdev_linux_set_policing,
1622 netdev_linux_get_in4,
1623 netdev_linux_set_in4,
1624 netdev_linux_get_in6,
1625 netdev_linux_add_router,
1626 netdev_linux_get_next_hop,
1627 netdev_linux_arp_lookup,
1629 netdev_linux_update_flags,
1631 netdev_linux_poll_add,
1632 netdev_linux_poll_remove,
1635 const struct netdev_class netdev_tap_class = {
1642 netdev_linux_create_tap,
1643 netdev_linux_destroy,
1644 NULL, /* reconfigure */
1649 NULL, /* enumerate */
1652 netdev_linux_recv_wait,
1656 netdev_linux_send_wait,
1658 netdev_linux_set_etheraddr,
1659 netdev_linux_get_etheraddr,
1660 netdev_linux_get_mtu,
1661 netdev_linux_get_ifindex,
1662 netdev_linux_get_carrier,
1663 netdev_linux_get_stats,
1664 NULL, /* set_stats */
1666 netdev_linux_get_features,
1667 netdev_linux_set_advertisements,
1668 netdev_linux_get_vlan_vid,
1669 netdev_linux_set_policing,
1671 netdev_linux_get_in4,
1672 netdev_linux_set_in4,
1673 netdev_linux_get_in6,
1674 netdev_linux_add_router,
1675 netdev_linux_get_next_hop,
1676 netdev_linux_arp_lookup,
1678 netdev_linux_update_flags,
1680 netdev_linux_poll_add,
1681 netdev_linux_poll_remove,
1686 get_stats_via_netlink(int ifindex, struct netdev_stats *stats)
1688 /* Policy for RTNLGRP_LINK messages.
1690 * There are *many* more fields in these messages, but currently we only
1691 * care about these fields. */
1692 static const struct nl_policy rtnlgrp_link_policy[] = {
1693 [IFLA_IFNAME] = { .type = NL_A_STRING, .optional = false },
1694 [IFLA_STATS] = { .type = NL_A_UNSPEC, .optional = true,
1695 .min_len = sizeof(struct rtnl_link_stats) },
1698 struct nl_sock *rtnl_sock;
1699 struct ofpbuf request;
1700 struct ofpbuf *reply;
1701 struct ifinfomsg *ifi;
1702 const struct rtnl_link_stats *rtnl_stats;
1703 struct nlattr *attrs[ARRAY_SIZE(rtnlgrp_link_policy)];
1706 error = get_rtnl_sock(&rtnl_sock);
1711 ofpbuf_init(&request, 0);
1712 nl_msg_put_nlmsghdr(&request, rtnl_sock, sizeof *ifi,
1713 RTM_GETLINK, NLM_F_REQUEST);
1714 ifi = ofpbuf_put_zeros(&request, sizeof *ifi);
1715 ifi->ifi_family = PF_UNSPEC;
1716 ifi->ifi_index = ifindex;
1717 error = nl_sock_transact(rtnl_sock, &request, &reply);
1718 ofpbuf_uninit(&request);
1723 if (!nl_policy_parse(reply, NLMSG_HDRLEN + sizeof(struct ifinfomsg),
1724 rtnlgrp_link_policy,
1725 attrs, ARRAY_SIZE(rtnlgrp_link_policy))) {
1726 ofpbuf_delete(reply);
1730 if (!attrs[IFLA_STATS]) {
1731 VLOG_WARN_RL(&rl, "RTM_GETLINK reply lacks stats");
1732 ofpbuf_delete(reply);
1736 rtnl_stats = nl_attr_get(attrs[IFLA_STATS]);
1737 stats->rx_packets = rtnl_stats->rx_packets;
1738 stats->tx_packets = rtnl_stats->tx_packets;
1739 stats->rx_bytes = rtnl_stats->rx_bytes;
1740 stats->tx_bytes = rtnl_stats->tx_bytes;
1741 stats->rx_errors = rtnl_stats->rx_errors;
1742 stats->tx_errors = rtnl_stats->tx_errors;
1743 stats->rx_dropped = rtnl_stats->rx_dropped;
1744 stats->tx_dropped = rtnl_stats->tx_dropped;
1745 stats->multicast = rtnl_stats->multicast;
1746 stats->collisions = rtnl_stats->collisions;
1747 stats->rx_length_errors = rtnl_stats->rx_length_errors;
1748 stats->rx_over_errors = rtnl_stats->rx_over_errors;
1749 stats->rx_crc_errors = rtnl_stats->rx_crc_errors;
1750 stats->rx_frame_errors = rtnl_stats->rx_frame_errors;
1751 stats->rx_fifo_errors = rtnl_stats->rx_fifo_errors;
1752 stats->rx_missed_errors = rtnl_stats->rx_missed_errors;
1753 stats->tx_aborted_errors = rtnl_stats->tx_aborted_errors;
1754 stats->tx_carrier_errors = rtnl_stats->tx_carrier_errors;
1755 stats->tx_fifo_errors = rtnl_stats->tx_fifo_errors;
1756 stats->tx_heartbeat_errors = rtnl_stats->tx_heartbeat_errors;
1757 stats->tx_window_errors = rtnl_stats->tx_window_errors;
1759 ofpbuf_delete(reply);
1765 get_stats_via_proc(const char *netdev_name, struct netdev_stats *stats)
1767 static const char fn[] = "/proc/net/dev";
1772 stream = fopen(fn, "r");
1774 VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(errno));
1779 while (fgets(line, sizeof line, stream)) {
1782 #define X64 "%"SCNu64
1785 X64 X64 X64 X64 X64 X64 X64 "%*u"
1786 X64 X64 X64 X64 X64 X64 X64 "%*u",
1792 &stats->rx_fifo_errors,
1793 &stats->rx_frame_errors,
1799 &stats->tx_fifo_errors,
1801 &stats->tx_carrier_errors) != 15) {
1802 VLOG_WARN_RL(&rl, "%s:%d: parse error", fn, ln);
1803 } else if (!strcmp(devname, netdev_name)) {
1804 stats->rx_length_errors = UINT64_MAX;
1805 stats->rx_over_errors = UINT64_MAX;
1806 stats->rx_crc_errors = UINT64_MAX;
1807 stats->rx_missed_errors = UINT64_MAX;
1808 stats->tx_aborted_errors = UINT64_MAX;
1809 stats->tx_heartbeat_errors = UINT64_MAX;
1810 stats->tx_window_errors = UINT64_MAX;
1816 VLOG_WARN_RL(&rl, "%s: no stats for %s", fn, netdev_name);
1822 get_flags(const struct netdev *netdev, int *flags)
1827 error = netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr, SIOCGIFFLAGS,
1829 *flags = ifr.ifr_flags;
1834 set_flags(struct netdev *netdev, int flags)
1838 ifr.ifr_flags = flags;
1839 return netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr, SIOCSIFFLAGS,
1844 do_get_ifindex(const char *netdev_name)
1848 strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
1849 COVERAGE_INC(netdev_get_ifindex);
1850 if (ioctl(af_inet_sock, SIOCGIFINDEX, &ifr) < 0) {
1851 VLOG_WARN_RL(&rl, "ioctl(SIOCGIFINDEX) on %s device failed: %s",
1852 netdev_name, strerror(errno));
1855 return ifr.ifr_ifindex;
1859 get_ifindex(const struct netdev *netdev_, int *ifindexp)
1861 struct netdev_dev_linux *netdev_dev =
1862 netdev_dev_linux_cast(netdev_get_dev(netdev_));
1864 if (!(netdev_dev->cache_valid & VALID_IFINDEX)) {
1865 int ifindex = do_get_ifindex(netdev_get_name(netdev_));
1869 netdev_dev->cache_valid |= VALID_IFINDEX;
1870 netdev_dev->ifindex = ifindex;
1872 *ifindexp = netdev_dev->ifindex;
1877 get_etheraddr(const char *netdev_name, uint8_t ea[ETH_ADDR_LEN])
1882 memset(&ifr, 0, sizeof ifr);
1883 strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
1884 COVERAGE_INC(netdev_get_hwaddr);
1885 if (ioctl(af_inet_sock, SIOCGIFHWADDR, &ifr) < 0) {
1886 VLOG_ERR("ioctl(SIOCGIFHWADDR) on %s device failed: %s",
1887 netdev_name, strerror(errno));
1890 hwaddr_family = ifr.ifr_hwaddr.sa_family;
1891 if (hwaddr_family != AF_UNSPEC && hwaddr_family != ARPHRD_ETHER) {
1892 VLOG_WARN("%s device has unknown hardware address family %d",
1893 netdev_name, hwaddr_family);
1895 memcpy(ea, ifr.ifr_hwaddr.sa_data, ETH_ADDR_LEN);
1900 set_etheraddr(const char *netdev_name, int hwaddr_family,
1901 const uint8_t mac[ETH_ADDR_LEN])
1905 memset(&ifr, 0, sizeof ifr);
1906 strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
1907 ifr.ifr_hwaddr.sa_family = hwaddr_family;
1908 memcpy(ifr.ifr_hwaddr.sa_data, mac, ETH_ADDR_LEN);
1909 COVERAGE_INC(netdev_set_hwaddr);
1910 if (ioctl(af_inet_sock, SIOCSIFHWADDR, &ifr) < 0) {
1911 VLOG_ERR("ioctl(SIOCSIFHWADDR) on %s device failed: %s",
1912 netdev_name, strerror(errno));
1919 netdev_linux_do_ethtool(const char *name, struct ethtool_cmd *ecmd,
1920 int cmd, const char *cmd_name)
1924 memset(&ifr, 0, sizeof ifr);
1925 strncpy(ifr.ifr_name, name, sizeof ifr.ifr_name);
1926 ifr.ifr_data = (caddr_t) ecmd;
1929 COVERAGE_INC(netdev_ethtool);
1930 if (ioctl(af_inet_sock, SIOCETHTOOL, &ifr) == 0) {
1933 if (errno != EOPNOTSUPP) {
1934 VLOG_WARN_RL(&rl, "ethtool command %s on network device %s "
1935 "failed: %s", cmd_name, name, strerror(errno));
1937 /* The device doesn't support this operation. That's pretty
1938 * common, so there's no point in logging anything. */
1945 netdev_linux_do_ioctl(const char *name, struct ifreq *ifr, int cmd,
1946 const char *cmd_name)
1948 strncpy(ifr->ifr_name, name, sizeof ifr->ifr_name);
1949 if (ioctl(af_inet_sock, cmd, ifr) == -1) {
1950 VLOG_DBG_RL(&rl, "%s: ioctl(%s) failed: %s", name, cmd_name,
1958 netdev_linux_get_ipv4(const struct netdev *netdev, struct in_addr *ip,
1959 int cmd, const char *cmd_name)
1964 ifr.ifr_addr.sa_family = AF_INET;
1965 error = netdev_linux_do_ioctl(netdev_get_name(netdev), &ifr, cmd, cmd_name);
1967 const struct sockaddr_in *sin = (struct sockaddr_in *) &ifr.ifr_addr;
1968 *ip = sin->sin_addr;
1973 /* Obtains a Netlink routing socket that is not subscribed to any multicast
1974 * groups. Returns 0 if successful, otherwise a positive errno value. Stores
1975 * the socket in '*rtnl_sockp' if successful, otherwise a null pointer. */
1977 get_rtnl_sock(struct nl_sock **rtnl_sockp)
1979 static struct nl_sock *sock;
1983 error = nl_sock_create(NETLINK_ROUTE, 0, 0, 0, &sock);
1985 VLOG_ERR_RL(&rl, "failed to create rtnetlink socket: %s",