2 * Copyright (c) 2009 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>
24 #include <linux/types.h>
25 #include <linux/ethtool.h>
26 #include <linux/rtnetlink.h>
27 #include <linux/sockios.h>
28 #include <linux/version.h>
29 #include <sys/types.h>
30 #include <sys/ioctl.h>
31 #include <sys/socket.h>
32 #include <netpacket/packet.h>
33 #include <net/ethernet.h>
35 #include <net/if_arp.h>
36 #include <net/if_packet.h>
37 #include <net/route.h>
38 #include <netinet/in.h>
45 #include "dynamic-string.h"
46 #include "fatal-signal.h"
47 #include "netdev-provider.h"
50 #include "openflow/openflow.h"
52 #include "poll-loop.h"
53 #include "rtnetlink.h"
54 #include "socket-util.h"
58 #define THIS_MODULE VLM_netdev_linux
61 /* These were introduced in Linux 2.6.14, so they might be missing if we have
63 #ifndef ADVERTISED_Pause
64 #define ADVERTISED_Pause (1 << 13)
66 #ifndef ADVERTISED_Asym_Pause
67 #define ADVERTISED_Asym_Pause (1 << 14)
73 /* File descriptors. For ordinary network devices, the two fds below are
74 * the same; for tap devices, they differ. */
75 int netdev_fd; /* Network device. */
76 int tap_fd; /* TAP character device, if any, otherwise the
79 struct netdev_linux_cache *cache;
83 VALID_IFINDEX = 1 << 0,
84 VALID_ETHERADDR = 1 << 1,
88 VALID_CARRIER = 1 << 5,
89 VALID_IS_INTERNAL = 1 << 6
92 /* Cached network device information. */
93 struct netdev_linux_cache {
94 struct shash_node *shash_node;
99 uint8_t etheraddr[ETH_ADDR_LEN];
100 struct in_addr address, netmask;
107 static struct shash cache_map = SHASH_INITIALIZER(&cache_map);
108 static struct rtnetlink_notifier netdev_linux_cache_notifier;
110 /* An AF_INET socket (used for ioctl operations). */
111 static int af_inet_sock = -1;
113 struct netdev_linux_notifier {
114 struct netdev_notifier notifier;
118 static struct shash netdev_linux_notifiers =
119 SHASH_INITIALIZER(&netdev_linux_notifiers);
120 static struct rtnetlink_notifier netdev_linux_poll_notifier;
122 /* This is set pretty low because we probably won't learn anything from the
123 * additional log messages. */
124 static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(5, 20);
126 static int netdev_linux_do_ethtool(struct netdev *, struct ethtool_cmd *,
127 int cmd, const char *cmd_name);
128 static int netdev_linux_do_ioctl(const struct netdev *, struct ifreq *,
129 int cmd, const char *cmd_name);
130 static int netdev_linux_get_ipv4(const struct netdev *, struct in_addr *,
131 int cmd, const char *cmd_name);
132 static int get_flags(const struct netdev *, int *flagsp);
133 static int set_flags(struct netdev *, int flags);
134 static int do_get_ifindex(const char *netdev_name);
135 static int get_ifindex(const struct netdev *, int *ifindexp);
136 static int do_set_addr(struct netdev *netdev,
137 int ioctl_nr, const char *ioctl_name,
138 struct in_addr addr);
139 static int get_etheraddr(const char *netdev_name, uint8_t ea[ETH_ADDR_LEN]);
140 static int set_etheraddr(const char *netdev_name, int hwaddr_family,
141 const uint8_t[ETH_ADDR_LEN]);
142 static int get_stats_via_netlink(int ifindex, struct netdev_stats *stats);
143 static int get_stats_via_proc(const char *netdev_name, struct netdev_stats *stats);
145 static struct netdev_linux *
146 netdev_linux_cast(const struct netdev *netdev)
148 netdev_assert_class(netdev, &netdev_linux_class);
149 return CONTAINER_OF(netdev, struct netdev_linux, netdev);
153 netdev_linux_init(void)
155 static int status = -1;
157 af_inet_sock = socket(AF_INET, SOCK_DGRAM, 0);
158 status = af_inet_sock >= 0 ? 0 : errno;
160 VLOG_ERR("failed to create inet socket: %s", strerror(status));
167 netdev_linux_run(void)
169 rtnetlink_notifier_run();
173 netdev_linux_wait(void)
175 rtnetlink_notifier_wait();
179 netdev_linux_cache_cb(const struct rtnetlink_change *change,
182 struct netdev_linux_cache *cache;
184 cache = shash_find_data(&cache_map, change->ifname);
189 struct shash_node *node;
190 SHASH_FOR_EACH (node, &cache_map) {
198 netdev_linux_open(const char *name, char *suffix, int ethertype,
199 struct netdev **netdevp)
201 struct netdev_linux *netdev;
202 enum netdev_flags flags;
205 /* Allocate network device. */
206 netdev = xcalloc(1, sizeof *netdev);
207 netdev_init(&netdev->netdev, suffix, &netdev_linux_class);
208 netdev->netdev_fd = -1;
210 netdev->cache = shash_find_data(&cache_map, suffix);
211 if (!netdev->cache) {
212 if (shash_is_empty(&cache_map)) {
213 int error = rtnetlink_notifier_register(
214 &netdev_linux_cache_notifier, netdev_linux_cache_cb, NULL);
216 netdev_close(&netdev->netdev);
220 netdev->cache = xmalloc(sizeof *netdev->cache);
221 netdev->cache->shash_node = shash_add(&cache_map, suffix,
223 netdev->cache->valid = 0;
224 netdev->cache->ref_cnt = 0;
226 netdev->cache->ref_cnt++;
228 if (!strncmp(name, "tap:", 4)) {
229 static const char tap_dev[] = "/dev/net/tun";
232 /* Open tap device. */
233 netdev->tap_fd = open(tap_dev, O_RDWR);
234 if (netdev->tap_fd < 0) {
236 VLOG_WARN("opening \"%s\" failed: %s", tap_dev, strerror(error));
240 /* Create tap device. */
241 ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
242 error = netdev_linux_do_ioctl(&netdev->netdev, &ifr,
243 TUNSETIFF, "TUNSETIFF");
248 /* Make non-blocking. */
249 error = set_nonblocking(netdev->tap_fd);
255 error = netdev_get_flags(&netdev->netdev, &flags);
256 if (error == ENODEV) {
260 if (netdev->tap_fd >= 0 || ethertype != NETDEV_ETH_TYPE_NONE) {
261 struct sockaddr_ll sll;
265 /* Create file descriptor. */
266 protocol = (ethertype == NETDEV_ETH_TYPE_ANY ? ETH_P_ALL
267 : ethertype == NETDEV_ETH_TYPE_802_2 ? ETH_P_802_2
269 netdev->netdev_fd = socket(PF_PACKET, SOCK_RAW, htons(protocol));
270 if (netdev->netdev_fd < 0) {
274 if (netdev->tap_fd < 0) {
275 netdev->tap_fd = netdev->netdev_fd;
278 /* Set non-blocking mode. */
279 error = set_nonblocking(netdev->netdev_fd);
284 /* Get ethernet device index. */
285 error = get_ifindex(&netdev->netdev, &ifindex);
290 /* Bind to specific ethernet device. */
291 memset(&sll, 0, sizeof sll);
292 sll.sll_family = AF_PACKET;
293 sll.sll_ifindex = ifindex;
294 if (bind(netdev->netdev_fd,
295 (struct sockaddr *) &sll, sizeof sll) < 0) {
297 VLOG_ERR("bind to %s failed: %s", suffix, strerror(error));
301 /* Between the socket() and bind() calls above, the socket receives all
302 * packets of the requested type on all system interfaces. We do not
303 * want to receive that data, but there is no way to avoid it. So we
304 * must now drain out the receive queue. */
305 error = drain_rcvbuf(netdev->netdev_fd);
311 *netdevp = &netdev->netdev;
315 netdev_close(&netdev->netdev);
319 /* Closes and destroys 'netdev'. */
321 netdev_linux_close(struct netdev *netdev_)
323 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
325 if (netdev->cache && !--netdev->cache->ref_cnt) {
326 shash_delete(&cache_map, netdev->cache->shash_node);
329 if (shash_is_empty(&cache_map)) {
330 rtnetlink_notifier_unregister(&netdev_linux_cache_notifier);
333 if (netdev->netdev_fd >= 0) {
334 close(netdev->netdev_fd);
336 if (netdev->tap_fd >= 0 && netdev->netdev_fd != netdev->tap_fd) {
337 close(netdev->tap_fd);
342 /* Initializes 'svec' with a list of the names of all known network devices. */
344 netdev_linux_enumerate(struct svec *svec)
346 struct if_nameindex *names;
348 names = if_nameindex();
352 for (i = 0; names[i].if_name != NULL; i++) {
353 svec_add(svec, names[i].if_name);
355 if_freenameindex(names);
358 VLOG_WARN("could not obtain list of network device names: %s",
365 netdev_linux_recv(struct netdev *netdev_, void *data, size_t size)
367 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
369 if (netdev->tap_fd < 0) {
370 /* Device was opened with NETDEV_ETH_TYPE_NONE. */
375 ssize_t retval = read(netdev->tap_fd, data, size);
378 } else if (errno != EINTR) {
379 if (errno != EAGAIN) {
380 VLOG_WARN_RL(&rl, "error receiving Ethernet packet on %s: %s",
381 strerror(errno), netdev_get_name(netdev_));
388 /* Registers with the poll loop to wake up from the next call to poll_block()
389 * when a packet is ready to be received with netdev_recv() on 'netdev'. */
391 netdev_linux_recv_wait(struct netdev *netdev_)
393 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
394 if (netdev->tap_fd >= 0) {
395 poll_fd_wait(netdev->tap_fd, POLLIN);
399 /* Discards all packets waiting to be received from 'netdev'. */
401 netdev_linux_drain(struct netdev *netdev_)
403 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
404 if (netdev->tap_fd < 0 && netdev->netdev_fd < 0) {
406 } else if (netdev->tap_fd != netdev->netdev_fd) {
408 int error = netdev_linux_do_ioctl(netdev_, &ifr,
409 SIOCGIFTXQLEN, "SIOCGIFTXQLEN");
413 drain_fd(netdev->tap_fd, ifr.ifr_qlen);
416 return drain_rcvbuf(netdev->netdev_fd);
420 /* Sends 'buffer' on 'netdev'. Returns 0 if successful, otherwise a positive
421 * errno value. Returns EAGAIN without blocking if the packet cannot be queued
422 * immediately. Returns EMSGSIZE if a partial packet was transmitted or if
423 * the packet is too big or too small to transmit on the device.
425 * The caller retains ownership of 'buffer' in all cases.
427 * The kernel maintains a packet transmission queue, so the caller is not
428 * expected to do additional queuing of packets. */
430 netdev_linux_send(struct netdev *netdev_, const void *data, size_t size)
432 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
434 /* XXX should support sending even if 'ethertype' was NETDEV_ETH_TYPE_NONE.
436 if (netdev->tap_fd < 0) {
441 ssize_t retval = write(netdev->tap_fd, data, size);
443 /* The Linux AF_PACKET implementation never blocks waiting for room
444 * for packets, instead returning ENOBUFS. Translate this into
445 * EAGAIN for the caller. */
446 if (errno == ENOBUFS) {
448 } else if (errno == EINTR) {
450 } else if (errno != EAGAIN) {
451 VLOG_WARN_RL(&rl, "error sending Ethernet packet on %s: %s",
452 netdev_get_name(netdev_), strerror(errno));
455 } else if (retval != size) {
456 VLOG_WARN_RL(&rl, "sent partial Ethernet packet (%zd bytes of "
457 "%zu) on %s", retval, size, netdev_get_name(netdev_));
465 /* Registers with the poll loop to wake up from the next call to poll_block()
466 * when the packet transmission queue has sufficient room to transmit a packet
467 * with netdev_send().
469 * The kernel maintains a packet transmission queue, so the client is not
470 * expected to do additional queuing of packets. Thus, this function is
471 * unlikely to ever be used. It is included for completeness. */
473 netdev_linux_send_wait(struct netdev *netdev_)
475 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
476 if (netdev->tap_fd < 0 && netdev->netdev_fd < 0) {
478 } else if (netdev->tap_fd == netdev->netdev_fd) {
479 poll_fd_wait(netdev->tap_fd, POLLOUT);
481 /* TAP device always accepts packets.*/
482 poll_immediate_wake();
486 /* Attempts to set 'netdev''s MAC address to 'mac'. Returns 0 if successful,
487 * otherwise a positive errno value. */
489 netdev_linux_set_etheraddr(struct netdev *netdev_,
490 const uint8_t mac[ETH_ADDR_LEN])
492 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
493 int error = set_etheraddr(netdev_get_name(netdev_), ARPHRD_ETHER, mac);
495 memcpy(netdev->cache->etheraddr, mac, ETH_ADDR_LEN);
500 /* Returns a pointer to 'netdev''s MAC address. The caller must not modify or
501 * free the returned buffer. */
503 netdev_linux_get_etheraddr(const struct netdev *netdev_,
504 uint8_t mac[ETH_ADDR_LEN])
506 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
507 if (!(netdev->cache->valid & VALID_ETHERADDR)) {
508 int error = get_etheraddr(netdev_get_name(netdev_),
509 netdev->cache->etheraddr);
513 netdev->cache->valid |= VALID_ETHERADDR;
515 memcpy(mac, netdev->cache->etheraddr, ETH_ADDR_LEN);
519 /* Returns the maximum size of transmitted (and received) packets on 'netdev',
520 * in bytes, not including the hardware header; thus, this is typically 1500
521 * bytes for Ethernet devices. */
523 netdev_linux_get_mtu(const struct netdev *netdev_, int *mtup)
525 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
526 if (!(netdev->cache->valid & VALID_MTU)) {
530 error = netdev_linux_do_ioctl(netdev_, &ifr, SIOCGIFMTU, "SIOCGIFMTU");
534 netdev->cache->mtu = ifr.ifr_mtu;
535 netdev->cache->valid |= VALID_MTU;
537 *mtup = netdev->cache->mtu;
542 netdev_linux_get_carrier(const struct netdev *netdev_, bool *carrier)
544 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
549 if (!(netdev->cache->valid & VALID_CARRIER)) {
553 fn = xasprintf("/sys/class/net/%s/carrier", netdev_get_name(netdev_));
554 fd = open(fn, O_RDONLY);
557 VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(error));
561 retval = read(fd, line, sizeof line);
564 if (error == EINVAL) {
565 /* This is the normal return value when we try to check carrier
566 * if the network device is not up. */
568 VLOG_WARN_RL(&rl, "%s: read failed: %s", fn, strerror(error));
571 } else if (retval == 0) {
573 VLOG_WARN_RL(&rl, "%s: unexpected end of file", fn);
577 if (line[0] != '0' && line[0] != '1') {
579 VLOG_WARN_RL(&rl, "%s: value is %c (expected 0 or 1)",
583 netdev->cache->carrier = line[0] != '0';
584 netdev->cache->valid |= VALID_CARRIER;
586 *carrier = netdev->cache->carrier;
597 /* Check whether we can we use RTM_GETLINK to get network device statistics.
598 * In pre-2.6.19 kernels, this was only available if wireless extensions were
601 check_for_working_netlink_stats(void)
603 /* Decide on the netdev_get_stats() implementation to use. Netlink is
604 * preferable, so if that works, we'll use it. */
605 int ifindex = do_get_ifindex("lo");
607 VLOG_WARN("failed to get ifindex for lo, "
608 "obtaining netdev stats from proc");
611 struct netdev_stats stats;
612 int error = get_stats_via_netlink(ifindex, &stats);
614 VLOG_DBG("obtaining netdev stats via rtnetlink");
617 VLOG_INFO("RTM_GETLINK failed (%s), obtaining netdev stats "
618 "via proc (you are probably running a pre-2.6.19 "
619 "kernel)", strerror(error));
625 /* Retrieves current device stats for 'netdev'.
627 * XXX All of the members of struct netdev_stats are 64 bits wide, but on
628 * 32-bit architectures the Linux network stats are only 32 bits. */
630 netdev_linux_get_stats(const struct netdev *netdev_, struct netdev_stats *stats)
632 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
633 static int use_netlink_stats = -1;
635 struct netdev_stats raw_stats;
636 struct netdev_stats *collect_stats = stats;
638 COVERAGE_INC(netdev_get_stats);
640 if (!(netdev->cache->valid & VALID_IS_INTERNAL)) {
641 netdev->cache->is_internal = (netdev->tap_fd != -1);
643 if (!netdev->cache->is_internal) {
644 struct ethtool_drvinfo drvinfo;
646 memset(&drvinfo, 0, sizeof drvinfo);
647 error = netdev_linux_do_ethtool(&netdev->netdev,
648 (struct ethtool_cmd *)&drvinfo,
653 netdev->cache->is_internal = !strcmp(drvinfo.driver,
659 if (netdev->cache->is_internal) {
660 collect_stats = &raw_stats;
663 if (use_netlink_stats < 0) {
664 use_netlink_stats = check_for_working_netlink_stats();
666 if (use_netlink_stats) {
669 error = get_ifindex(&netdev->netdev, &ifindex);
671 error = get_stats_via_netlink(ifindex, collect_stats);
674 error = get_stats_via_proc(netdev->netdev.name, collect_stats);
677 /* If this port is an internal port then the transmit and receive stats
678 * will appear to be swapped relative to the other ports since we are the
679 * one sending the data, not a remote computer. For consistency, we swap
681 if (netdev->cache->is_internal) {
682 stats->rx_packets = raw_stats.tx_packets;
683 stats->tx_packets = raw_stats.rx_packets;
684 stats->rx_bytes = raw_stats.tx_bytes;
685 stats->tx_bytes = raw_stats.rx_bytes;
686 stats->rx_errors = raw_stats.tx_errors;
687 stats->tx_errors = raw_stats.rx_errors;
688 stats->rx_dropped = raw_stats.tx_dropped;
689 stats->tx_dropped = raw_stats.rx_dropped;
690 stats->multicast = raw_stats.multicast;
691 stats->collisions = raw_stats.collisions;
692 stats->rx_length_errors = 0;
693 stats->rx_over_errors = 0;
694 stats->rx_crc_errors = 0;
695 stats->rx_frame_errors = 0;
696 stats->rx_fifo_errors = 0;
697 stats->rx_missed_errors = 0;
698 stats->tx_aborted_errors = 0;
699 stats->tx_carrier_errors = 0;
700 stats->tx_fifo_errors = 0;
701 stats->tx_heartbeat_errors = 0;
702 stats->tx_window_errors = 0;
708 /* Stores the features supported by 'netdev' into each of '*current',
709 * '*advertised', '*supported', and '*peer' that are non-null. Each value is a
710 * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if
711 * successful, otherwise a positive errno value. On failure, all of the
712 * passed-in values are set to 0. */
714 netdev_linux_get_features(struct netdev *netdev,
715 uint32_t *current, uint32_t *advertised,
716 uint32_t *supported, uint32_t *peer)
718 struct ethtool_cmd ecmd;
721 memset(&ecmd, 0, sizeof ecmd);
722 error = netdev_linux_do_ethtool(netdev, &ecmd,
723 ETHTOOL_GSET, "ETHTOOL_GSET");
728 /* Supported features. */
730 if (ecmd.supported & SUPPORTED_10baseT_Half) {
731 *supported |= OFPPF_10MB_HD;
733 if (ecmd.supported & SUPPORTED_10baseT_Full) {
734 *supported |= OFPPF_10MB_FD;
736 if (ecmd.supported & SUPPORTED_100baseT_Half) {
737 *supported |= OFPPF_100MB_HD;
739 if (ecmd.supported & SUPPORTED_100baseT_Full) {
740 *supported |= OFPPF_100MB_FD;
742 if (ecmd.supported & SUPPORTED_1000baseT_Half) {
743 *supported |= OFPPF_1GB_HD;
745 if (ecmd.supported & SUPPORTED_1000baseT_Full) {
746 *supported |= OFPPF_1GB_FD;
748 if (ecmd.supported & SUPPORTED_10000baseT_Full) {
749 *supported |= OFPPF_10GB_FD;
751 if (ecmd.supported & SUPPORTED_TP) {
752 *supported |= OFPPF_COPPER;
754 if (ecmd.supported & SUPPORTED_FIBRE) {
755 *supported |= OFPPF_FIBER;
757 if (ecmd.supported & SUPPORTED_Autoneg) {
758 *supported |= OFPPF_AUTONEG;
760 if (ecmd.supported & SUPPORTED_Pause) {
761 *supported |= OFPPF_PAUSE;
763 if (ecmd.supported & SUPPORTED_Asym_Pause) {
764 *supported |= OFPPF_PAUSE_ASYM;
767 /* Advertised features. */
769 if (ecmd.advertising & ADVERTISED_10baseT_Half) {
770 *advertised |= OFPPF_10MB_HD;
772 if (ecmd.advertising & ADVERTISED_10baseT_Full) {
773 *advertised |= OFPPF_10MB_FD;
775 if (ecmd.advertising & ADVERTISED_100baseT_Half) {
776 *advertised |= OFPPF_100MB_HD;
778 if (ecmd.advertising & ADVERTISED_100baseT_Full) {
779 *advertised |= OFPPF_100MB_FD;
781 if (ecmd.advertising & ADVERTISED_1000baseT_Half) {
782 *advertised |= OFPPF_1GB_HD;
784 if (ecmd.advertising & ADVERTISED_1000baseT_Full) {
785 *advertised |= OFPPF_1GB_FD;
787 if (ecmd.advertising & ADVERTISED_10000baseT_Full) {
788 *advertised |= OFPPF_10GB_FD;
790 if (ecmd.advertising & ADVERTISED_TP) {
791 *advertised |= OFPPF_COPPER;
793 if (ecmd.advertising & ADVERTISED_FIBRE) {
794 *advertised |= OFPPF_FIBER;
796 if (ecmd.advertising & ADVERTISED_Autoneg) {
797 *advertised |= OFPPF_AUTONEG;
799 if (ecmd.advertising & ADVERTISED_Pause) {
800 *advertised |= OFPPF_PAUSE;
802 if (ecmd.advertising & ADVERTISED_Asym_Pause) {
803 *advertised |= OFPPF_PAUSE_ASYM;
806 /* Current settings. */
807 if (ecmd.speed == SPEED_10) {
808 *current = ecmd.duplex ? OFPPF_10MB_FD : OFPPF_10MB_HD;
809 } else if (ecmd.speed == SPEED_100) {
810 *current = ecmd.duplex ? OFPPF_100MB_FD : OFPPF_100MB_HD;
811 } else if (ecmd.speed == SPEED_1000) {
812 *current = ecmd.duplex ? OFPPF_1GB_FD : OFPPF_1GB_HD;
813 } else if (ecmd.speed == SPEED_10000) {
814 *current = OFPPF_10GB_FD;
819 if (ecmd.port == PORT_TP) {
820 *current |= OFPPF_COPPER;
821 } else if (ecmd.port == PORT_FIBRE) {
822 *current |= OFPPF_FIBER;
826 *current |= OFPPF_AUTONEG;
829 /* Peer advertisements. */
835 /* Set the features advertised by 'netdev' to 'advertise'. */
837 netdev_linux_set_advertisements(struct netdev *netdev, uint32_t advertise)
839 struct ethtool_cmd ecmd;
842 memset(&ecmd, 0, sizeof ecmd);
843 error = netdev_linux_do_ethtool(netdev, &ecmd,
844 ETHTOOL_GSET, "ETHTOOL_GSET");
849 ecmd.advertising = 0;
850 if (advertise & OFPPF_10MB_HD) {
851 ecmd.advertising |= ADVERTISED_10baseT_Half;
853 if (advertise & OFPPF_10MB_FD) {
854 ecmd.advertising |= ADVERTISED_10baseT_Full;
856 if (advertise & OFPPF_100MB_HD) {
857 ecmd.advertising |= ADVERTISED_100baseT_Half;
859 if (advertise & OFPPF_100MB_FD) {
860 ecmd.advertising |= ADVERTISED_100baseT_Full;
862 if (advertise & OFPPF_1GB_HD) {
863 ecmd.advertising |= ADVERTISED_1000baseT_Half;
865 if (advertise & OFPPF_1GB_FD) {
866 ecmd.advertising |= ADVERTISED_1000baseT_Full;
868 if (advertise & OFPPF_10GB_FD) {
869 ecmd.advertising |= ADVERTISED_10000baseT_Full;
871 if (advertise & OFPPF_COPPER) {
872 ecmd.advertising |= ADVERTISED_TP;
874 if (advertise & OFPPF_FIBER) {
875 ecmd.advertising |= ADVERTISED_FIBRE;
877 if (advertise & OFPPF_AUTONEG) {
878 ecmd.advertising |= ADVERTISED_Autoneg;
880 if (advertise & OFPPF_PAUSE) {
881 ecmd.advertising |= ADVERTISED_Pause;
883 if (advertise & OFPPF_PAUSE_ASYM) {
884 ecmd.advertising |= ADVERTISED_Asym_Pause;
886 return netdev_linux_do_ethtool(netdev, &ecmd,
887 ETHTOOL_SSET, "ETHTOOL_SSET");
890 /* If 'netdev_name' is the name of a VLAN network device (e.g. one created with
891 * vconfig(8)), sets '*vlan_vid' to the VLAN VID associated with that device
892 * and returns 0. Otherwise returns a errno value (specifically ENOENT if
893 * 'netdev_name' is the name of a network device that is not a VLAN device) and
894 * sets '*vlan_vid' to -1. */
896 netdev_linux_get_vlan_vid(const struct netdev *netdev, int *vlan_vid)
898 const char *netdev_name = netdev_get_name(netdev);
899 struct ds line = DS_EMPTY_INITIALIZER;
904 COVERAGE_INC(netdev_get_vlan_vid);
905 fn = xasprintf("/proc/net/vlan/%s", netdev_name);
906 stream = fopen(fn, "r");
912 if (ds_get_line(&line, stream)) {
913 if (ferror(stream)) {
915 VLOG_ERR_RL(&rl, "error reading \"%s\": %s", fn, strerror(errno));
918 VLOG_ERR_RL(&rl, "unexpected end of file reading \"%s\"", fn);
923 if (!sscanf(ds_cstr(&line), "%*s VID: %d", vlan_vid)) {
925 VLOG_ERR_RL(&rl, "parse error reading \"%s\" line 1: \"%s\"",
944 #define POLICE_ADD_CMD "/sbin/tc qdisc add dev %s handle ffff: ingress"
945 #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"
946 /* We redirect stderr to /dev/null because we often want to remove all
947 * traffic control configuration on a port so its in a known state. If
948 * this done when there is no such configuration, tc complains, so we just
951 #define POLICE_DEL_CMD "/sbin/tc qdisc del dev %s handle ffff: ingress 2>/dev/null"
953 /* Attempts to set input rate limiting (policing) policy. */
955 netdev_linux_set_policing(struct netdev *netdev,
956 uint32_t kbits_rate, uint32_t kbits_burst)
958 const char *netdev_name = netdev_get_name(netdev);
961 COVERAGE_INC(netdev_set_policing);
964 /* Default to 10 kilobits if not specified. */
968 /* xxx This should be more careful about only adding if it
969 * xxx actually exists, as opposed to always deleting it. */
970 snprintf(command, sizeof(command), POLICE_DEL_CMD, netdev_name);
971 if (system(command) == -1) {
972 VLOG_WARN_RL(&rl, "%s: problem removing policing", netdev_name);
975 snprintf(command, sizeof(command), POLICE_ADD_CMD, netdev_name);
976 if (system(command) != 0) {
977 VLOG_WARN_RL(&rl, "%s: problem adding policing", netdev_name);
981 snprintf(command, sizeof(command), POLICE_CONFIG_CMD, netdev_name,
982 kbits_rate, kbits_burst);
983 if (system(command) != 0) {
984 VLOG_WARN_RL(&rl, "%s: problem configuring policing",
989 snprintf(command, sizeof(command), POLICE_DEL_CMD, netdev_name);
990 if (system(command) == -1) {
991 VLOG_WARN_RL(&rl, "%s: problem removing policing", netdev_name);
999 netdev_linux_get_in4(const struct netdev *netdev_,
1000 struct in_addr *address, struct in_addr *netmask)
1002 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
1003 if (!(netdev->cache->valid & VALID_IN4)) {
1006 error = netdev_linux_get_ipv4(netdev_, &netdev->cache->address,
1007 SIOCGIFADDR, "SIOCGIFADDR");
1012 error = netdev_linux_get_ipv4(netdev_, &netdev->cache->netmask,
1013 SIOCGIFNETMASK, "SIOCGIFNETMASK");
1018 netdev->cache->valid |= VALID_IN4;
1020 *address = netdev->cache->address;
1021 *netmask = netdev->cache->netmask;
1022 return address->s_addr == INADDR_ANY ? EADDRNOTAVAIL : 0;
1026 netdev_linux_set_in4(struct netdev *netdev_, struct in_addr address,
1027 struct in_addr netmask)
1029 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
1032 error = do_set_addr(netdev_, SIOCSIFADDR, "SIOCSIFADDR", address);
1034 netdev->cache->valid |= VALID_IN4;
1035 netdev->cache->address = address;
1036 netdev->cache->netmask = netmask;
1037 if (address.s_addr != INADDR_ANY) {
1038 error = do_set_addr(netdev_, SIOCSIFNETMASK,
1039 "SIOCSIFNETMASK", netmask);
1046 parse_if_inet6_line(const char *line,
1047 struct in6_addr *in6, char ifname[16 + 1])
1049 uint8_t *s6 = in6->s6_addr;
1050 #define X8 "%2"SCNx8
1052 " "X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8
1053 "%*x %*x %*x %*x %16s\n",
1054 &s6[0], &s6[1], &s6[2], &s6[3],
1055 &s6[4], &s6[5], &s6[6], &s6[7],
1056 &s6[8], &s6[9], &s6[10], &s6[11],
1057 &s6[12], &s6[13], &s6[14], &s6[15],
1061 /* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address (if
1062 * 'in6' is non-null) and returns true. Otherwise, returns false. */
1064 netdev_linux_get_in6(const struct netdev *netdev_, struct in6_addr *in6)
1066 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
1067 if (!(netdev->cache->valid & VALID_IN6)) {
1071 netdev->cache->in6 = in6addr_any;
1073 file = fopen("/proc/net/if_inet6", "r");
1075 const char *name = netdev_get_name(netdev_);
1076 while (fgets(line, sizeof line, file)) {
1077 struct in6_addr in6;
1078 char ifname[16 + 1];
1079 if (parse_if_inet6_line(line, &in6, ifname)
1080 && !strcmp(name, ifname))
1082 netdev->cache->in6 = in6;
1088 netdev->cache->valid |= VALID_IN6;
1090 *in6 = netdev->cache->in6;
1095 make_in4_sockaddr(struct sockaddr *sa, struct in_addr addr)
1097 struct sockaddr_in sin;
1098 memset(&sin, 0, sizeof sin);
1099 sin.sin_family = AF_INET;
1100 sin.sin_addr = addr;
1103 memset(sa, 0, sizeof *sa);
1104 memcpy(sa, &sin, sizeof sin);
1108 do_set_addr(struct netdev *netdev,
1109 int ioctl_nr, const char *ioctl_name, struct in_addr addr)
1112 strncpy(ifr.ifr_name, netdev->name, sizeof ifr.ifr_name);
1113 make_in4_sockaddr(&ifr.ifr_addr, addr);
1114 return netdev_linux_do_ioctl(netdev, &ifr, ioctl_nr, ioctl_name);
1117 /* Adds 'router' as a default IP gateway. */
1119 netdev_linux_add_router(struct netdev *netdev UNUSED, struct in_addr router)
1121 struct in_addr any = { INADDR_ANY };
1125 memset(&rt, 0, sizeof rt);
1126 make_in4_sockaddr(&rt.rt_dst, any);
1127 make_in4_sockaddr(&rt.rt_gateway, router);
1128 make_in4_sockaddr(&rt.rt_genmask, any);
1129 rt.rt_flags = RTF_UP | RTF_GATEWAY;
1130 COVERAGE_INC(netdev_add_router);
1131 error = ioctl(af_inet_sock, SIOCADDRT, &rt) < 0 ? errno : 0;
1133 VLOG_WARN("ioctl(SIOCADDRT): %s", strerror(error));
1139 netdev_linux_get_next_hop(const struct in_addr *host, struct in_addr *next_hop,
1142 static const char fn[] = "/proc/net/route";
1147 *netdev_name = NULL;
1148 stream = fopen(fn, "r");
1149 if (stream == NULL) {
1150 VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(errno));
1155 while (fgets(line, sizeof line, stream)) {
1158 uint32_t dest, gateway, mask;
1159 int refcnt, metric, mtu;
1160 unsigned int flags, use, window, irtt;
1163 "%16s %"SCNx32" %"SCNx32" %04X %d %u %d %"SCNx32
1165 iface, &dest, &gateway, &flags, &refcnt,
1166 &use, &metric, &mask, &mtu, &window, &irtt) != 11) {
1168 VLOG_WARN_RL(&rl, "%s: could not parse line %d: %s",
1172 if (!(flags & RTF_UP)) {
1173 /* Skip routes that aren't up. */
1177 /* The output of 'dest', 'mask', and 'gateway' were given in
1178 * network byte order, so we don't need need any endian
1179 * conversions here. */
1180 if ((dest & mask) == (host->s_addr & mask)) {
1182 /* The host is directly reachable. */
1183 next_hop->s_addr = 0;
1185 /* To reach the host, we must go through a gateway. */
1186 next_hop->s_addr = gateway;
1188 *netdev_name = xstrdup(iface);
1199 /* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be
1200 * successfully retrieved, it stores the corresponding MAC address in 'mac' and
1201 * returns 0. Otherwise, it returns a positive errno value; in particular,
1202 * ENXIO indicates that there is not ARP table entry for 'ip' on 'netdev'. */
1204 netdev_linux_arp_lookup(const struct netdev *netdev,
1205 uint32_t ip, uint8_t mac[ETH_ADDR_LEN])
1208 struct sockaddr_in *pa;
1211 memset(&r, 0, sizeof r);
1212 pa = (struct sockaddr_in *) &r.arp_pa;
1213 pa->sin_family = AF_INET;
1214 pa->sin_addr.s_addr = ip;
1216 r.arp_ha.sa_family = ARPHRD_ETHER;
1218 strncpy(r.arp_dev, netdev->name, sizeof r.arp_dev);
1219 COVERAGE_INC(netdev_arp_lookup);
1220 retval = ioctl(af_inet_sock, SIOCGARP, &r) < 0 ? errno : 0;
1222 memcpy(mac, r.arp_ha.sa_data, ETH_ADDR_LEN);
1223 } else if (retval != ENXIO) {
1224 VLOG_WARN_RL(&rl, "%s: could not look up ARP entry for "IP_FMT": %s",
1225 netdev->name, IP_ARGS(&ip), strerror(retval));
1231 nd_to_iff_flags(enum netdev_flags nd)
1234 if (nd & NETDEV_UP) {
1237 if (nd & NETDEV_PROMISC) {
1244 iff_to_nd_flags(int iff)
1246 enum netdev_flags nd = 0;
1250 if (iff & IFF_PROMISC) {
1251 nd |= NETDEV_PROMISC;
1257 netdev_linux_update_flags(struct netdev *netdev, enum netdev_flags off,
1258 enum netdev_flags on, enum netdev_flags *old_flagsp)
1260 int old_flags, new_flags;
1263 error = get_flags(netdev, &old_flags);
1265 *old_flagsp = iff_to_nd_flags(old_flags);
1266 new_flags = (old_flags & ~nd_to_iff_flags(off)) | nd_to_iff_flags(on);
1267 if (new_flags != old_flags) {
1268 error = set_flags(netdev, new_flags);
1275 poll_notify(struct list *list)
1277 struct netdev_linux_notifier *notifier;
1278 LIST_FOR_EACH (notifier, struct netdev_linux_notifier, node, list) {
1279 struct netdev_notifier *n = ¬ifier->notifier;
1285 netdev_linux_poll_cb(const struct rtnetlink_change *change,
1289 struct list *list = shash_find_data(&netdev_linux_notifiers,
1295 struct shash_node *node;
1296 SHASH_FOR_EACH (node, &netdev_linux_notifiers) {
1297 poll_notify(node->data);
1303 netdev_linux_poll_add(struct netdev *netdev,
1304 void (*cb)(struct netdev_notifier *), void *aux,
1305 struct netdev_notifier **notifierp)
1307 const char *netdev_name = netdev_get_name(netdev);
1308 struct netdev_linux_notifier *notifier;
1311 if (shash_is_empty(&netdev_linux_notifiers)) {
1312 int error = rtnetlink_notifier_register(&netdev_linux_poll_notifier,
1313 netdev_linux_poll_cb, NULL);
1319 list = shash_find_data(&netdev_linux_notifiers, netdev_name);
1321 list = xmalloc(sizeof *list);
1323 shash_add(&netdev_linux_notifiers, netdev_name, list);
1326 notifier = xmalloc(sizeof *notifier);
1327 netdev_notifier_init(¬ifier->notifier, netdev, cb, aux);
1328 list_push_back(list, ¬ifier->node);
1329 *notifierp = ¬ifier->notifier;
1334 netdev_linux_poll_remove(struct netdev_notifier *notifier_)
1336 struct netdev_linux_notifier *notifier =
1337 CONTAINER_OF(notifier_, struct netdev_linux_notifier, notifier);
1340 /* Remove 'notifier' from its list. */
1341 list = list_remove(¬ifier->node);
1342 if (list_is_empty(list)) {
1343 /* The list is now empty. Remove it from the hash and free it. */
1344 const char *netdev_name = netdev_get_name(notifier->notifier.netdev);
1345 shash_delete(&netdev_linux_notifiers,
1346 shash_find(&netdev_linux_notifiers, netdev_name));
1351 /* If that was the last notifier, unregister. */
1352 if (shash_is_empty(&netdev_linux_notifiers)) {
1353 rtnetlink_notifier_unregister(&netdev_linux_poll_notifier);
1357 const struct netdev_class netdev_linux_class = {
1368 netdev_linux_enumerate,
1371 netdev_linux_recv_wait,
1375 netdev_linux_send_wait,
1377 netdev_linux_set_etheraddr,
1378 netdev_linux_get_etheraddr,
1379 netdev_linux_get_mtu,
1380 netdev_linux_get_carrier,
1381 netdev_linux_get_stats,
1383 netdev_linux_get_features,
1384 netdev_linux_set_advertisements,
1385 netdev_linux_get_vlan_vid,
1386 netdev_linux_set_policing,
1388 netdev_linux_get_in4,
1389 netdev_linux_set_in4,
1390 netdev_linux_get_in6,
1391 netdev_linux_add_router,
1392 netdev_linux_get_next_hop,
1393 netdev_linux_arp_lookup,
1395 netdev_linux_update_flags,
1397 netdev_linux_poll_add,
1398 netdev_linux_poll_remove,
1401 const struct netdev_class netdev_tap_class = {
1412 netdev_linux_enumerate,
1415 netdev_linux_recv_wait,
1419 netdev_linux_send_wait,
1421 netdev_linux_set_etheraddr,
1422 netdev_linux_get_etheraddr,
1423 netdev_linux_get_mtu,
1424 netdev_linux_get_carrier,
1425 netdev_linux_get_stats,
1427 netdev_linux_get_features,
1428 netdev_linux_set_advertisements,
1429 netdev_linux_get_vlan_vid,
1430 netdev_linux_set_policing,
1432 netdev_linux_get_in4,
1433 netdev_linux_set_in4,
1434 netdev_linux_get_in6,
1435 netdev_linux_add_router,
1436 netdev_linux_get_next_hop,
1437 netdev_linux_arp_lookup,
1439 netdev_linux_update_flags,
1441 netdev_linux_poll_add,
1442 netdev_linux_poll_remove,
1446 get_stats_via_netlink(int ifindex, struct netdev_stats *stats)
1448 /* Policy for RTNLGRP_LINK messages.
1450 * There are *many* more fields in these messages, but currently we only
1451 * care about these fields. */
1452 static const struct nl_policy rtnlgrp_link_policy[] = {
1453 [IFLA_IFNAME] = { .type = NL_A_STRING, .optional = false },
1454 [IFLA_STATS] = { .type = NL_A_UNSPEC, .optional = true,
1455 .min_len = sizeof(struct rtnl_link_stats) },
1459 static struct nl_sock *rtnl_sock;
1460 struct ofpbuf request;
1461 struct ofpbuf *reply;
1462 struct ifinfomsg *ifi;
1463 const struct rtnl_link_stats *rtnl_stats;
1464 struct nlattr *attrs[ARRAY_SIZE(rtnlgrp_link_policy)];
1468 error = nl_sock_create(NETLINK_ROUTE, 0, 0, 0, &rtnl_sock);
1470 VLOG_ERR_RL(&rl, "failed to create rtnetlink socket: %s",
1476 ofpbuf_init(&request, 0);
1477 nl_msg_put_nlmsghdr(&request, rtnl_sock, sizeof *ifi,
1478 RTM_GETLINK, NLM_F_REQUEST);
1479 ifi = ofpbuf_put_zeros(&request, sizeof *ifi);
1480 ifi->ifi_family = PF_UNSPEC;
1481 ifi->ifi_index = ifindex;
1482 error = nl_sock_transact(rtnl_sock, &request, &reply);
1483 ofpbuf_uninit(&request);
1488 if (!nl_policy_parse(reply, NLMSG_HDRLEN + sizeof(struct ifinfomsg),
1489 rtnlgrp_link_policy,
1490 attrs, ARRAY_SIZE(rtnlgrp_link_policy))) {
1491 ofpbuf_delete(reply);
1495 if (!attrs[IFLA_STATS]) {
1496 VLOG_WARN_RL(&rl, "RTM_GETLINK reply lacks stats");
1500 rtnl_stats = nl_attr_get(attrs[IFLA_STATS]);
1501 stats->rx_packets = rtnl_stats->rx_packets;
1502 stats->tx_packets = rtnl_stats->tx_packets;
1503 stats->rx_bytes = rtnl_stats->rx_bytes;
1504 stats->tx_bytes = rtnl_stats->tx_bytes;
1505 stats->rx_errors = rtnl_stats->rx_errors;
1506 stats->tx_errors = rtnl_stats->tx_errors;
1507 stats->rx_dropped = rtnl_stats->rx_dropped;
1508 stats->tx_dropped = rtnl_stats->tx_dropped;
1509 stats->multicast = rtnl_stats->multicast;
1510 stats->collisions = rtnl_stats->collisions;
1511 stats->rx_length_errors = rtnl_stats->rx_length_errors;
1512 stats->rx_over_errors = rtnl_stats->rx_over_errors;
1513 stats->rx_crc_errors = rtnl_stats->rx_crc_errors;
1514 stats->rx_frame_errors = rtnl_stats->rx_frame_errors;
1515 stats->rx_fifo_errors = rtnl_stats->rx_fifo_errors;
1516 stats->rx_missed_errors = rtnl_stats->rx_missed_errors;
1517 stats->tx_aborted_errors = rtnl_stats->tx_aborted_errors;
1518 stats->tx_carrier_errors = rtnl_stats->tx_carrier_errors;
1519 stats->tx_fifo_errors = rtnl_stats->tx_fifo_errors;
1520 stats->tx_heartbeat_errors = rtnl_stats->tx_heartbeat_errors;
1521 stats->tx_window_errors = rtnl_stats->tx_window_errors;
1527 get_stats_via_proc(const char *netdev_name, struct netdev_stats *stats)
1529 static const char fn[] = "/proc/net/dev";
1534 stream = fopen(fn, "r");
1536 VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(errno));
1541 while (fgets(line, sizeof line, stream)) {
1544 #define X64 "%"SCNu64
1547 X64 X64 X64 X64 X64 X64 X64 "%*u"
1548 X64 X64 X64 X64 X64 X64 X64 "%*u",
1554 &stats->rx_fifo_errors,
1555 &stats->rx_frame_errors,
1561 &stats->tx_fifo_errors,
1563 &stats->tx_carrier_errors) != 15) {
1564 VLOG_WARN_RL(&rl, "%s:%d: parse error", fn, ln);
1565 } else if (!strcmp(devname, netdev_name)) {
1566 stats->rx_length_errors = UINT64_MAX;
1567 stats->rx_over_errors = UINT64_MAX;
1568 stats->rx_crc_errors = UINT64_MAX;
1569 stats->rx_missed_errors = UINT64_MAX;
1570 stats->tx_aborted_errors = UINT64_MAX;
1571 stats->tx_heartbeat_errors = UINT64_MAX;
1572 stats->tx_window_errors = UINT64_MAX;
1578 VLOG_WARN_RL(&rl, "%s: no stats for %s", fn, netdev_name);
1584 get_flags(const struct netdev *netdev, int *flags)
1589 error = netdev_linux_do_ioctl(netdev, &ifr, SIOCGIFFLAGS, "SIOCGIFFLAGS");
1590 *flags = ifr.ifr_flags;
1595 set_flags(struct netdev *netdev, int flags)
1599 ifr.ifr_flags = flags;
1600 return netdev_linux_do_ioctl(netdev, &ifr, SIOCSIFFLAGS, "SIOCSIFFLAGS");
1604 do_get_ifindex(const char *netdev_name)
1608 strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
1609 COVERAGE_INC(netdev_get_ifindex);
1610 if (ioctl(af_inet_sock, SIOCGIFINDEX, &ifr) < 0) {
1611 VLOG_WARN_RL(&rl, "ioctl(SIOCGIFINDEX) on %s device failed: %s",
1612 netdev_name, strerror(errno));
1615 return ifr.ifr_ifindex;
1619 get_ifindex(const struct netdev *netdev_, int *ifindexp)
1621 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
1623 if (!(netdev->cache->valid & VALID_IFINDEX)) {
1624 int ifindex = do_get_ifindex(netdev_get_name(netdev_));
1628 netdev->cache->valid |= VALID_IFINDEX;
1629 netdev->cache->ifindex = ifindex;
1631 *ifindexp = netdev->cache->ifindex;
1636 get_etheraddr(const char *netdev_name, uint8_t ea[ETH_ADDR_LEN])
1641 memset(&ifr, 0, sizeof ifr);
1642 strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
1643 COVERAGE_INC(netdev_get_hwaddr);
1644 if (ioctl(af_inet_sock, SIOCGIFHWADDR, &ifr) < 0) {
1645 VLOG_ERR("ioctl(SIOCGIFHWADDR) on %s device failed: %s",
1646 netdev_name, strerror(errno));
1649 hwaddr_family = ifr.ifr_hwaddr.sa_family;
1650 if (hwaddr_family != AF_UNSPEC && hwaddr_family != ARPHRD_ETHER) {
1651 VLOG_WARN("%s device has unknown hardware address family %d",
1652 netdev_name, hwaddr_family);
1654 memcpy(ea, ifr.ifr_hwaddr.sa_data, ETH_ADDR_LEN);
1659 set_etheraddr(const char *netdev_name, int hwaddr_family,
1660 const uint8_t mac[ETH_ADDR_LEN])
1664 memset(&ifr, 0, sizeof ifr);
1665 strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
1666 ifr.ifr_hwaddr.sa_family = hwaddr_family;
1667 memcpy(ifr.ifr_hwaddr.sa_data, mac, ETH_ADDR_LEN);
1668 COVERAGE_INC(netdev_set_hwaddr);
1669 if (ioctl(af_inet_sock, SIOCSIFHWADDR, &ifr) < 0) {
1670 VLOG_ERR("ioctl(SIOCSIFHWADDR) on %s device failed: %s",
1671 netdev_name, strerror(errno));
1678 netdev_linux_do_ethtool(struct netdev *netdev, struct ethtool_cmd *ecmd,
1679 int cmd, const char *cmd_name)
1683 memset(&ifr, 0, sizeof ifr);
1684 strncpy(ifr.ifr_name, netdev->name, sizeof ifr.ifr_name);
1685 ifr.ifr_data = (caddr_t) ecmd;
1688 COVERAGE_INC(netdev_ethtool);
1689 if (ioctl(af_inet_sock, SIOCETHTOOL, &ifr) == 0) {
1692 if (errno != EOPNOTSUPP) {
1693 VLOG_WARN_RL(&rl, "ethtool command %s on network device %s "
1694 "failed: %s", cmd_name, netdev->name,
1697 /* The device doesn't support this operation. That's pretty
1698 * common, so there's no point in logging anything. */
1705 netdev_linux_do_ioctl(const struct netdev *netdev, struct ifreq *ifr,
1706 int cmd, const char *cmd_name)
1708 strncpy(ifr->ifr_name, netdev_get_name(netdev), sizeof ifr->ifr_name);
1709 if (ioctl(af_inet_sock, cmd, ifr) == -1) {
1710 VLOG_DBG_RL(&rl, "%s: ioctl(%s) failed: %s",
1711 netdev_get_name(netdev), cmd_name, strerror(errno));
1718 netdev_linux_get_ipv4(const struct netdev *netdev, struct in_addr *ip,
1719 int cmd, const char *cmd_name)
1724 ifr.ifr_addr.sa_family = AF_INET;
1725 error = netdev_linux_do_ioctl(netdev, &ifr, cmd, cmd_name);
1727 const struct sockaddr_in *sin = (struct sockaddr_in *) &ifr.ifr_addr;
1728 *ip = sin->sin_addr;