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,
658 netdev->cache->valid |= VALID_IS_INTERNAL;
661 if (netdev->cache->is_internal) {
662 collect_stats = &raw_stats;
665 if (use_netlink_stats < 0) {
666 use_netlink_stats = check_for_working_netlink_stats();
668 if (use_netlink_stats) {
671 error = get_ifindex(&netdev->netdev, &ifindex);
673 error = get_stats_via_netlink(ifindex, collect_stats);
676 error = get_stats_via_proc(netdev->netdev.name, collect_stats);
679 /* If this port is an internal port then the transmit and receive stats
680 * will appear to be swapped relative to the other ports since we are the
681 * one sending the data, not a remote computer. For consistency, we swap
683 if (netdev->cache->is_internal) {
684 stats->rx_packets = raw_stats.tx_packets;
685 stats->tx_packets = raw_stats.rx_packets;
686 stats->rx_bytes = raw_stats.tx_bytes;
687 stats->tx_bytes = raw_stats.rx_bytes;
688 stats->rx_errors = raw_stats.tx_errors;
689 stats->tx_errors = raw_stats.rx_errors;
690 stats->rx_dropped = raw_stats.tx_dropped;
691 stats->tx_dropped = raw_stats.rx_dropped;
692 stats->multicast = raw_stats.multicast;
693 stats->collisions = raw_stats.collisions;
694 stats->rx_length_errors = 0;
695 stats->rx_over_errors = 0;
696 stats->rx_crc_errors = 0;
697 stats->rx_frame_errors = 0;
698 stats->rx_fifo_errors = 0;
699 stats->rx_missed_errors = 0;
700 stats->tx_aborted_errors = 0;
701 stats->tx_carrier_errors = 0;
702 stats->tx_fifo_errors = 0;
703 stats->tx_heartbeat_errors = 0;
704 stats->tx_window_errors = 0;
710 /* Stores the features supported by 'netdev' into each of '*current',
711 * '*advertised', '*supported', and '*peer' that are non-null. Each value is a
712 * bitmap of "enum ofp_port_features" bits, in host byte order. Returns 0 if
713 * successful, otherwise a positive errno value. On failure, all of the
714 * passed-in values are set to 0. */
716 netdev_linux_get_features(struct netdev *netdev,
717 uint32_t *current, uint32_t *advertised,
718 uint32_t *supported, uint32_t *peer)
720 struct ethtool_cmd ecmd;
723 memset(&ecmd, 0, sizeof ecmd);
724 error = netdev_linux_do_ethtool(netdev, &ecmd,
725 ETHTOOL_GSET, "ETHTOOL_GSET");
730 /* Supported features. */
732 if (ecmd.supported & SUPPORTED_10baseT_Half) {
733 *supported |= OFPPF_10MB_HD;
735 if (ecmd.supported & SUPPORTED_10baseT_Full) {
736 *supported |= OFPPF_10MB_FD;
738 if (ecmd.supported & SUPPORTED_100baseT_Half) {
739 *supported |= OFPPF_100MB_HD;
741 if (ecmd.supported & SUPPORTED_100baseT_Full) {
742 *supported |= OFPPF_100MB_FD;
744 if (ecmd.supported & SUPPORTED_1000baseT_Half) {
745 *supported |= OFPPF_1GB_HD;
747 if (ecmd.supported & SUPPORTED_1000baseT_Full) {
748 *supported |= OFPPF_1GB_FD;
750 if (ecmd.supported & SUPPORTED_10000baseT_Full) {
751 *supported |= OFPPF_10GB_FD;
753 if (ecmd.supported & SUPPORTED_TP) {
754 *supported |= OFPPF_COPPER;
756 if (ecmd.supported & SUPPORTED_FIBRE) {
757 *supported |= OFPPF_FIBER;
759 if (ecmd.supported & SUPPORTED_Autoneg) {
760 *supported |= OFPPF_AUTONEG;
762 if (ecmd.supported & SUPPORTED_Pause) {
763 *supported |= OFPPF_PAUSE;
765 if (ecmd.supported & SUPPORTED_Asym_Pause) {
766 *supported |= OFPPF_PAUSE_ASYM;
769 /* Advertised features. */
771 if (ecmd.advertising & ADVERTISED_10baseT_Half) {
772 *advertised |= OFPPF_10MB_HD;
774 if (ecmd.advertising & ADVERTISED_10baseT_Full) {
775 *advertised |= OFPPF_10MB_FD;
777 if (ecmd.advertising & ADVERTISED_100baseT_Half) {
778 *advertised |= OFPPF_100MB_HD;
780 if (ecmd.advertising & ADVERTISED_100baseT_Full) {
781 *advertised |= OFPPF_100MB_FD;
783 if (ecmd.advertising & ADVERTISED_1000baseT_Half) {
784 *advertised |= OFPPF_1GB_HD;
786 if (ecmd.advertising & ADVERTISED_1000baseT_Full) {
787 *advertised |= OFPPF_1GB_FD;
789 if (ecmd.advertising & ADVERTISED_10000baseT_Full) {
790 *advertised |= OFPPF_10GB_FD;
792 if (ecmd.advertising & ADVERTISED_TP) {
793 *advertised |= OFPPF_COPPER;
795 if (ecmd.advertising & ADVERTISED_FIBRE) {
796 *advertised |= OFPPF_FIBER;
798 if (ecmd.advertising & ADVERTISED_Autoneg) {
799 *advertised |= OFPPF_AUTONEG;
801 if (ecmd.advertising & ADVERTISED_Pause) {
802 *advertised |= OFPPF_PAUSE;
804 if (ecmd.advertising & ADVERTISED_Asym_Pause) {
805 *advertised |= OFPPF_PAUSE_ASYM;
808 /* Current settings. */
809 if (ecmd.speed == SPEED_10) {
810 *current = ecmd.duplex ? OFPPF_10MB_FD : OFPPF_10MB_HD;
811 } else if (ecmd.speed == SPEED_100) {
812 *current = ecmd.duplex ? OFPPF_100MB_FD : OFPPF_100MB_HD;
813 } else if (ecmd.speed == SPEED_1000) {
814 *current = ecmd.duplex ? OFPPF_1GB_FD : OFPPF_1GB_HD;
815 } else if (ecmd.speed == SPEED_10000) {
816 *current = OFPPF_10GB_FD;
821 if (ecmd.port == PORT_TP) {
822 *current |= OFPPF_COPPER;
823 } else if (ecmd.port == PORT_FIBRE) {
824 *current |= OFPPF_FIBER;
828 *current |= OFPPF_AUTONEG;
831 /* Peer advertisements. */
837 /* Set the features advertised by 'netdev' to 'advertise'. */
839 netdev_linux_set_advertisements(struct netdev *netdev, uint32_t advertise)
841 struct ethtool_cmd ecmd;
844 memset(&ecmd, 0, sizeof ecmd);
845 error = netdev_linux_do_ethtool(netdev, &ecmd,
846 ETHTOOL_GSET, "ETHTOOL_GSET");
851 ecmd.advertising = 0;
852 if (advertise & OFPPF_10MB_HD) {
853 ecmd.advertising |= ADVERTISED_10baseT_Half;
855 if (advertise & OFPPF_10MB_FD) {
856 ecmd.advertising |= ADVERTISED_10baseT_Full;
858 if (advertise & OFPPF_100MB_HD) {
859 ecmd.advertising |= ADVERTISED_100baseT_Half;
861 if (advertise & OFPPF_100MB_FD) {
862 ecmd.advertising |= ADVERTISED_100baseT_Full;
864 if (advertise & OFPPF_1GB_HD) {
865 ecmd.advertising |= ADVERTISED_1000baseT_Half;
867 if (advertise & OFPPF_1GB_FD) {
868 ecmd.advertising |= ADVERTISED_1000baseT_Full;
870 if (advertise & OFPPF_10GB_FD) {
871 ecmd.advertising |= ADVERTISED_10000baseT_Full;
873 if (advertise & OFPPF_COPPER) {
874 ecmd.advertising |= ADVERTISED_TP;
876 if (advertise & OFPPF_FIBER) {
877 ecmd.advertising |= ADVERTISED_FIBRE;
879 if (advertise & OFPPF_AUTONEG) {
880 ecmd.advertising |= ADVERTISED_Autoneg;
882 if (advertise & OFPPF_PAUSE) {
883 ecmd.advertising |= ADVERTISED_Pause;
885 if (advertise & OFPPF_PAUSE_ASYM) {
886 ecmd.advertising |= ADVERTISED_Asym_Pause;
888 return netdev_linux_do_ethtool(netdev, &ecmd,
889 ETHTOOL_SSET, "ETHTOOL_SSET");
892 /* If 'netdev_name' is the name of a VLAN network device (e.g. one created with
893 * vconfig(8)), sets '*vlan_vid' to the VLAN VID associated with that device
894 * and returns 0. Otherwise returns a errno value (specifically ENOENT if
895 * 'netdev_name' is the name of a network device that is not a VLAN device) and
896 * sets '*vlan_vid' to -1. */
898 netdev_linux_get_vlan_vid(const struct netdev *netdev, int *vlan_vid)
900 const char *netdev_name = netdev_get_name(netdev);
901 struct ds line = DS_EMPTY_INITIALIZER;
906 COVERAGE_INC(netdev_get_vlan_vid);
907 fn = xasprintf("/proc/net/vlan/%s", netdev_name);
908 stream = fopen(fn, "r");
914 if (ds_get_line(&line, stream)) {
915 if (ferror(stream)) {
917 VLOG_ERR_RL(&rl, "error reading \"%s\": %s", fn, strerror(errno));
920 VLOG_ERR_RL(&rl, "unexpected end of file reading \"%s\"", fn);
925 if (!sscanf(ds_cstr(&line), "%*s VID: %d", vlan_vid)) {
927 VLOG_ERR_RL(&rl, "parse error reading \"%s\" line 1: \"%s\"",
946 #define POLICE_ADD_CMD "/sbin/tc qdisc add dev %s handle ffff: ingress"
947 #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"
948 /* We redirect stderr to /dev/null because we often want to remove all
949 * traffic control configuration on a port so its in a known state. If
950 * this done when there is no such configuration, tc complains, so we just
953 #define POLICE_DEL_CMD "/sbin/tc qdisc del dev %s handle ffff: ingress 2>/dev/null"
955 /* Attempts to set input rate limiting (policing) policy. */
957 netdev_linux_set_policing(struct netdev *netdev,
958 uint32_t kbits_rate, uint32_t kbits_burst)
960 const char *netdev_name = netdev_get_name(netdev);
963 COVERAGE_INC(netdev_set_policing);
966 /* Default to 10 kilobits if not specified. */
970 /* xxx This should be more careful about only adding if it
971 * xxx actually exists, as opposed to always deleting it. */
972 snprintf(command, sizeof(command), POLICE_DEL_CMD, netdev_name);
973 if (system(command) == -1) {
974 VLOG_WARN_RL(&rl, "%s: problem removing policing", netdev_name);
977 snprintf(command, sizeof(command), POLICE_ADD_CMD, netdev_name);
978 if (system(command) != 0) {
979 VLOG_WARN_RL(&rl, "%s: problem adding policing", netdev_name);
983 snprintf(command, sizeof(command), POLICE_CONFIG_CMD, netdev_name,
984 kbits_rate, kbits_burst);
985 if (system(command) != 0) {
986 VLOG_WARN_RL(&rl, "%s: problem configuring policing",
991 snprintf(command, sizeof(command), POLICE_DEL_CMD, netdev_name);
992 if (system(command) == -1) {
993 VLOG_WARN_RL(&rl, "%s: problem removing policing", netdev_name);
1001 netdev_linux_get_in4(const struct netdev *netdev_,
1002 struct in_addr *address, struct in_addr *netmask)
1004 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
1005 if (!(netdev->cache->valid & VALID_IN4)) {
1008 error = netdev_linux_get_ipv4(netdev_, &netdev->cache->address,
1009 SIOCGIFADDR, "SIOCGIFADDR");
1014 error = netdev_linux_get_ipv4(netdev_, &netdev->cache->netmask,
1015 SIOCGIFNETMASK, "SIOCGIFNETMASK");
1020 netdev->cache->valid |= VALID_IN4;
1022 *address = netdev->cache->address;
1023 *netmask = netdev->cache->netmask;
1024 return address->s_addr == INADDR_ANY ? EADDRNOTAVAIL : 0;
1028 netdev_linux_set_in4(struct netdev *netdev_, struct in_addr address,
1029 struct in_addr netmask)
1031 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
1034 error = do_set_addr(netdev_, SIOCSIFADDR, "SIOCSIFADDR", address);
1036 netdev->cache->valid |= VALID_IN4;
1037 netdev->cache->address = address;
1038 netdev->cache->netmask = netmask;
1039 if (address.s_addr != INADDR_ANY) {
1040 error = do_set_addr(netdev_, SIOCSIFNETMASK,
1041 "SIOCSIFNETMASK", netmask);
1048 parse_if_inet6_line(const char *line,
1049 struct in6_addr *in6, char ifname[16 + 1])
1051 uint8_t *s6 = in6->s6_addr;
1052 #define X8 "%2"SCNx8
1054 " "X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8 X8
1055 "%*x %*x %*x %*x %16s\n",
1056 &s6[0], &s6[1], &s6[2], &s6[3],
1057 &s6[4], &s6[5], &s6[6], &s6[7],
1058 &s6[8], &s6[9], &s6[10], &s6[11],
1059 &s6[12], &s6[13], &s6[14], &s6[15],
1063 /* If 'netdev' has an assigned IPv6 address, sets '*in6' to that address (if
1064 * 'in6' is non-null) and returns true. Otherwise, returns false. */
1066 netdev_linux_get_in6(const struct netdev *netdev_, struct in6_addr *in6)
1068 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
1069 if (!(netdev->cache->valid & VALID_IN6)) {
1073 netdev->cache->in6 = in6addr_any;
1075 file = fopen("/proc/net/if_inet6", "r");
1077 const char *name = netdev_get_name(netdev_);
1078 while (fgets(line, sizeof line, file)) {
1079 struct in6_addr in6;
1080 char ifname[16 + 1];
1081 if (parse_if_inet6_line(line, &in6, ifname)
1082 && !strcmp(name, ifname))
1084 netdev->cache->in6 = in6;
1090 netdev->cache->valid |= VALID_IN6;
1092 *in6 = netdev->cache->in6;
1097 make_in4_sockaddr(struct sockaddr *sa, struct in_addr addr)
1099 struct sockaddr_in sin;
1100 memset(&sin, 0, sizeof sin);
1101 sin.sin_family = AF_INET;
1102 sin.sin_addr = addr;
1105 memset(sa, 0, sizeof *sa);
1106 memcpy(sa, &sin, sizeof sin);
1110 do_set_addr(struct netdev *netdev,
1111 int ioctl_nr, const char *ioctl_name, struct in_addr addr)
1114 strncpy(ifr.ifr_name, netdev->name, sizeof ifr.ifr_name);
1115 make_in4_sockaddr(&ifr.ifr_addr, addr);
1116 return netdev_linux_do_ioctl(netdev, &ifr, ioctl_nr, ioctl_name);
1119 /* Adds 'router' as a default IP gateway. */
1121 netdev_linux_add_router(struct netdev *netdev UNUSED, struct in_addr router)
1123 struct in_addr any = { INADDR_ANY };
1127 memset(&rt, 0, sizeof rt);
1128 make_in4_sockaddr(&rt.rt_dst, any);
1129 make_in4_sockaddr(&rt.rt_gateway, router);
1130 make_in4_sockaddr(&rt.rt_genmask, any);
1131 rt.rt_flags = RTF_UP | RTF_GATEWAY;
1132 COVERAGE_INC(netdev_add_router);
1133 error = ioctl(af_inet_sock, SIOCADDRT, &rt) < 0 ? errno : 0;
1135 VLOG_WARN("ioctl(SIOCADDRT): %s", strerror(error));
1141 netdev_linux_get_next_hop(const struct in_addr *host, struct in_addr *next_hop,
1144 static const char fn[] = "/proc/net/route";
1149 *netdev_name = NULL;
1150 stream = fopen(fn, "r");
1151 if (stream == NULL) {
1152 VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(errno));
1157 while (fgets(line, sizeof line, stream)) {
1160 uint32_t dest, gateway, mask;
1161 int refcnt, metric, mtu;
1162 unsigned int flags, use, window, irtt;
1165 "%16s %"SCNx32" %"SCNx32" %04X %d %u %d %"SCNx32
1167 iface, &dest, &gateway, &flags, &refcnt,
1168 &use, &metric, &mask, &mtu, &window, &irtt) != 11) {
1170 VLOG_WARN_RL(&rl, "%s: could not parse line %d: %s",
1174 if (!(flags & RTF_UP)) {
1175 /* Skip routes that aren't up. */
1179 /* The output of 'dest', 'mask', and 'gateway' were given in
1180 * network byte order, so we don't need need any endian
1181 * conversions here. */
1182 if ((dest & mask) == (host->s_addr & mask)) {
1184 /* The host is directly reachable. */
1185 next_hop->s_addr = 0;
1187 /* To reach the host, we must go through a gateway. */
1188 next_hop->s_addr = gateway;
1190 *netdev_name = xstrdup(iface);
1201 /* Looks up the ARP table entry for 'ip' on 'netdev'. If one exists and can be
1202 * successfully retrieved, it stores the corresponding MAC address in 'mac' and
1203 * returns 0. Otherwise, it returns a positive errno value; in particular,
1204 * ENXIO indicates that there is not ARP table entry for 'ip' on 'netdev'. */
1206 netdev_linux_arp_lookup(const struct netdev *netdev,
1207 uint32_t ip, uint8_t mac[ETH_ADDR_LEN])
1210 struct sockaddr_in *pa;
1213 memset(&r, 0, sizeof r);
1214 pa = (struct sockaddr_in *) &r.arp_pa;
1215 pa->sin_family = AF_INET;
1216 pa->sin_addr.s_addr = ip;
1218 r.arp_ha.sa_family = ARPHRD_ETHER;
1220 strncpy(r.arp_dev, netdev->name, sizeof r.arp_dev);
1221 COVERAGE_INC(netdev_arp_lookup);
1222 retval = ioctl(af_inet_sock, SIOCGARP, &r) < 0 ? errno : 0;
1224 memcpy(mac, r.arp_ha.sa_data, ETH_ADDR_LEN);
1225 } else if (retval != ENXIO) {
1226 VLOG_WARN_RL(&rl, "%s: could not look up ARP entry for "IP_FMT": %s",
1227 netdev->name, IP_ARGS(&ip), strerror(retval));
1233 nd_to_iff_flags(enum netdev_flags nd)
1236 if (nd & NETDEV_UP) {
1239 if (nd & NETDEV_PROMISC) {
1246 iff_to_nd_flags(int iff)
1248 enum netdev_flags nd = 0;
1252 if (iff & IFF_PROMISC) {
1253 nd |= NETDEV_PROMISC;
1259 netdev_linux_update_flags(struct netdev *netdev, enum netdev_flags off,
1260 enum netdev_flags on, enum netdev_flags *old_flagsp)
1262 int old_flags, new_flags;
1265 error = get_flags(netdev, &old_flags);
1267 *old_flagsp = iff_to_nd_flags(old_flags);
1268 new_flags = (old_flags & ~nd_to_iff_flags(off)) | nd_to_iff_flags(on);
1269 if (new_flags != old_flags) {
1270 error = set_flags(netdev, new_flags);
1277 poll_notify(struct list *list)
1279 struct netdev_linux_notifier *notifier;
1280 LIST_FOR_EACH (notifier, struct netdev_linux_notifier, node, list) {
1281 struct netdev_notifier *n = ¬ifier->notifier;
1287 netdev_linux_poll_cb(const struct rtnetlink_change *change,
1291 struct list *list = shash_find_data(&netdev_linux_notifiers,
1297 struct shash_node *node;
1298 SHASH_FOR_EACH (node, &netdev_linux_notifiers) {
1299 poll_notify(node->data);
1305 netdev_linux_poll_add(struct netdev *netdev,
1306 void (*cb)(struct netdev_notifier *), void *aux,
1307 struct netdev_notifier **notifierp)
1309 const char *netdev_name = netdev_get_name(netdev);
1310 struct netdev_linux_notifier *notifier;
1313 if (shash_is_empty(&netdev_linux_notifiers)) {
1314 int error = rtnetlink_notifier_register(&netdev_linux_poll_notifier,
1315 netdev_linux_poll_cb, NULL);
1321 list = shash_find_data(&netdev_linux_notifiers, netdev_name);
1323 list = xmalloc(sizeof *list);
1325 shash_add(&netdev_linux_notifiers, netdev_name, list);
1328 notifier = xmalloc(sizeof *notifier);
1329 netdev_notifier_init(¬ifier->notifier, netdev, cb, aux);
1330 list_push_back(list, ¬ifier->node);
1331 *notifierp = ¬ifier->notifier;
1336 netdev_linux_poll_remove(struct netdev_notifier *notifier_)
1338 struct netdev_linux_notifier *notifier =
1339 CONTAINER_OF(notifier_, struct netdev_linux_notifier, notifier);
1342 /* Remove 'notifier' from its list. */
1343 list = list_remove(¬ifier->node);
1344 if (list_is_empty(list)) {
1345 /* The list is now empty. Remove it from the hash and free it. */
1346 const char *netdev_name = netdev_get_name(notifier->notifier.netdev);
1347 shash_delete(&netdev_linux_notifiers,
1348 shash_find(&netdev_linux_notifiers, netdev_name));
1353 /* If that was the last notifier, unregister. */
1354 if (shash_is_empty(&netdev_linux_notifiers)) {
1355 rtnetlink_notifier_unregister(&netdev_linux_poll_notifier);
1359 const struct netdev_class netdev_linux_class = {
1370 netdev_linux_enumerate,
1373 netdev_linux_recv_wait,
1377 netdev_linux_send_wait,
1379 netdev_linux_set_etheraddr,
1380 netdev_linux_get_etheraddr,
1381 netdev_linux_get_mtu,
1382 netdev_linux_get_carrier,
1383 netdev_linux_get_stats,
1385 netdev_linux_get_features,
1386 netdev_linux_set_advertisements,
1387 netdev_linux_get_vlan_vid,
1388 netdev_linux_set_policing,
1390 netdev_linux_get_in4,
1391 netdev_linux_set_in4,
1392 netdev_linux_get_in6,
1393 netdev_linux_add_router,
1394 netdev_linux_get_next_hop,
1395 netdev_linux_arp_lookup,
1397 netdev_linux_update_flags,
1399 netdev_linux_poll_add,
1400 netdev_linux_poll_remove,
1403 const struct netdev_class netdev_tap_class = {
1414 netdev_linux_enumerate,
1417 netdev_linux_recv_wait,
1421 netdev_linux_send_wait,
1423 netdev_linux_set_etheraddr,
1424 netdev_linux_get_etheraddr,
1425 netdev_linux_get_mtu,
1426 netdev_linux_get_carrier,
1427 netdev_linux_get_stats,
1429 netdev_linux_get_features,
1430 netdev_linux_set_advertisements,
1431 netdev_linux_get_vlan_vid,
1432 netdev_linux_set_policing,
1434 netdev_linux_get_in4,
1435 netdev_linux_set_in4,
1436 netdev_linux_get_in6,
1437 netdev_linux_add_router,
1438 netdev_linux_get_next_hop,
1439 netdev_linux_arp_lookup,
1441 netdev_linux_update_flags,
1443 netdev_linux_poll_add,
1444 netdev_linux_poll_remove,
1448 get_stats_via_netlink(int ifindex, struct netdev_stats *stats)
1450 /* Policy for RTNLGRP_LINK messages.
1452 * There are *many* more fields in these messages, but currently we only
1453 * care about these fields. */
1454 static const struct nl_policy rtnlgrp_link_policy[] = {
1455 [IFLA_IFNAME] = { .type = NL_A_STRING, .optional = false },
1456 [IFLA_STATS] = { .type = NL_A_UNSPEC, .optional = true,
1457 .min_len = sizeof(struct rtnl_link_stats) },
1461 static struct nl_sock *rtnl_sock;
1462 struct ofpbuf request;
1463 struct ofpbuf *reply;
1464 struct ifinfomsg *ifi;
1465 const struct rtnl_link_stats *rtnl_stats;
1466 struct nlattr *attrs[ARRAY_SIZE(rtnlgrp_link_policy)];
1470 error = nl_sock_create(NETLINK_ROUTE, 0, 0, 0, &rtnl_sock);
1472 VLOG_ERR_RL(&rl, "failed to create rtnetlink socket: %s",
1478 ofpbuf_init(&request, 0);
1479 nl_msg_put_nlmsghdr(&request, rtnl_sock, sizeof *ifi,
1480 RTM_GETLINK, NLM_F_REQUEST);
1481 ifi = ofpbuf_put_zeros(&request, sizeof *ifi);
1482 ifi->ifi_family = PF_UNSPEC;
1483 ifi->ifi_index = ifindex;
1484 error = nl_sock_transact(rtnl_sock, &request, &reply);
1485 ofpbuf_uninit(&request);
1490 if (!nl_policy_parse(reply, NLMSG_HDRLEN + sizeof(struct ifinfomsg),
1491 rtnlgrp_link_policy,
1492 attrs, ARRAY_SIZE(rtnlgrp_link_policy))) {
1493 ofpbuf_delete(reply);
1497 if (!attrs[IFLA_STATS]) {
1498 VLOG_WARN_RL(&rl, "RTM_GETLINK reply lacks stats");
1502 rtnl_stats = nl_attr_get(attrs[IFLA_STATS]);
1503 stats->rx_packets = rtnl_stats->rx_packets;
1504 stats->tx_packets = rtnl_stats->tx_packets;
1505 stats->rx_bytes = rtnl_stats->rx_bytes;
1506 stats->tx_bytes = rtnl_stats->tx_bytes;
1507 stats->rx_errors = rtnl_stats->rx_errors;
1508 stats->tx_errors = rtnl_stats->tx_errors;
1509 stats->rx_dropped = rtnl_stats->rx_dropped;
1510 stats->tx_dropped = rtnl_stats->tx_dropped;
1511 stats->multicast = rtnl_stats->multicast;
1512 stats->collisions = rtnl_stats->collisions;
1513 stats->rx_length_errors = rtnl_stats->rx_length_errors;
1514 stats->rx_over_errors = rtnl_stats->rx_over_errors;
1515 stats->rx_crc_errors = rtnl_stats->rx_crc_errors;
1516 stats->rx_frame_errors = rtnl_stats->rx_frame_errors;
1517 stats->rx_fifo_errors = rtnl_stats->rx_fifo_errors;
1518 stats->rx_missed_errors = rtnl_stats->rx_missed_errors;
1519 stats->tx_aborted_errors = rtnl_stats->tx_aborted_errors;
1520 stats->tx_carrier_errors = rtnl_stats->tx_carrier_errors;
1521 stats->tx_fifo_errors = rtnl_stats->tx_fifo_errors;
1522 stats->tx_heartbeat_errors = rtnl_stats->tx_heartbeat_errors;
1523 stats->tx_window_errors = rtnl_stats->tx_window_errors;
1529 get_stats_via_proc(const char *netdev_name, struct netdev_stats *stats)
1531 static const char fn[] = "/proc/net/dev";
1536 stream = fopen(fn, "r");
1538 VLOG_WARN_RL(&rl, "%s: open failed: %s", fn, strerror(errno));
1543 while (fgets(line, sizeof line, stream)) {
1546 #define X64 "%"SCNu64
1549 X64 X64 X64 X64 X64 X64 X64 "%*u"
1550 X64 X64 X64 X64 X64 X64 X64 "%*u",
1556 &stats->rx_fifo_errors,
1557 &stats->rx_frame_errors,
1563 &stats->tx_fifo_errors,
1565 &stats->tx_carrier_errors) != 15) {
1566 VLOG_WARN_RL(&rl, "%s:%d: parse error", fn, ln);
1567 } else if (!strcmp(devname, netdev_name)) {
1568 stats->rx_length_errors = UINT64_MAX;
1569 stats->rx_over_errors = UINT64_MAX;
1570 stats->rx_crc_errors = UINT64_MAX;
1571 stats->rx_missed_errors = UINT64_MAX;
1572 stats->tx_aborted_errors = UINT64_MAX;
1573 stats->tx_heartbeat_errors = UINT64_MAX;
1574 stats->tx_window_errors = UINT64_MAX;
1580 VLOG_WARN_RL(&rl, "%s: no stats for %s", fn, netdev_name);
1586 get_flags(const struct netdev *netdev, int *flags)
1591 error = netdev_linux_do_ioctl(netdev, &ifr, SIOCGIFFLAGS, "SIOCGIFFLAGS");
1592 *flags = ifr.ifr_flags;
1597 set_flags(struct netdev *netdev, int flags)
1601 ifr.ifr_flags = flags;
1602 return netdev_linux_do_ioctl(netdev, &ifr, SIOCSIFFLAGS, "SIOCSIFFLAGS");
1606 do_get_ifindex(const char *netdev_name)
1610 strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
1611 COVERAGE_INC(netdev_get_ifindex);
1612 if (ioctl(af_inet_sock, SIOCGIFINDEX, &ifr) < 0) {
1613 VLOG_WARN_RL(&rl, "ioctl(SIOCGIFINDEX) on %s device failed: %s",
1614 netdev_name, strerror(errno));
1617 return ifr.ifr_ifindex;
1621 get_ifindex(const struct netdev *netdev_, int *ifindexp)
1623 struct netdev_linux *netdev = netdev_linux_cast(netdev_);
1625 if (!(netdev->cache->valid & VALID_IFINDEX)) {
1626 int ifindex = do_get_ifindex(netdev_get_name(netdev_));
1630 netdev->cache->valid |= VALID_IFINDEX;
1631 netdev->cache->ifindex = ifindex;
1633 *ifindexp = netdev->cache->ifindex;
1638 get_etheraddr(const char *netdev_name, uint8_t ea[ETH_ADDR_LEN])
1643 memset(&ifr, 0, sizeof ifr);
1644 strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
1645 COVERAGE_INC(netdev_get_hwaddr);
1646 if (ioctl(af_inet_sock, SIOCGIFHWADDR, &ifr) < 0) {
1647 VLOG_ERR("ioctl(SIOCGIFHWADDR) on %s device failed: %s",
1648 netdev_name, strerror(errno));
1651 hwaddr_family = ifr.ifr_hwaddr.sa_family;
1652 if (hwaddr_family != AF_UNSPEC && hwaddr_family != ARPHRD_ETHER) {
1653 VLOG_WARN("%s device has unknown hardware address family %d",
1654 netdev_name, hwaddr_family);
1656 memcpy(ea, ifr.ifr_hwaddr.sa_data, ETH_ADDR_LEN);
1661 set_etheraddr(const char *netdev_name, int hwaddr_family,
1662 const uint8_t mac[ETH_ADDR_LEN])
1666 memset(&ifr, 0, sizeof ifr);
1667 strncpy(ifr.ifr_name, netdev_name, sizeof ifr.ifr_name);
1668 ifr.ifr_hwaddr.sa_family = hwaddr_family;
1669 memcpy(ifr.ifr_hwaddr.sa_data, mac, ETH_ADDR_LEN);
1670 COVERAGE_INC(netdev_set_hwaddr);
1671 if (ioctl(af_inet_sock, SIOCSIFHWADDR, &ifr) < 0) {
1672 VLOG_ERR("ioctl(SIOCSIFHWADDR) on %s device failed: %s",
1673 netdev_name, strerror(errno));
1680 netdev_linux_do_ethtool(struct netdev *netdev, struct ethtool_cmd *ecmd,
1681 int cmd, const char *cmd_name)
1685 memset(&ifr, 0, sizeof ifr);
1686 strncpy(ifr.ifr_name, netdev->name, sizeof ifr.ifr_name);
1687 ifr.ifr_data = (caddr_t) ecmd;
1690 COVERAGE_INC(netdev_ethtool);
1691 if (ioctl(af_inet_sock, SIOCETHTOOL, &ifr) == 0) {
1694 if (errno != EOPNOTSUPP) {
1695 VLOG_WARN_RL(&rl, "ethtool command %s on network device %s "
1696 "failed: %s", cmd_name, netdev->name,
1699 /* The device doesn't support this operation. That's pretty
1700 * common, so there's no point in logging anything. */
1707 netdev_linux_do_ioctl(const struct netdev *netdev, struct ifreq *ifr,
1708 int cmd, const char *cmd_name)
1710 strncpy(ifr->ifr_name, netdev_get_name(netdev), sizeof ifr->ifr_name);
1711 if (ioctl(af_inet_sock, cmd, ifr) == -1) {
1712 VLOG_DBG_RL(&rl, "%s: ioctl(%s) failed: %s",
1713 netdev_get_name(netdev), cmd_name, strerror(errno));
1720 netdev_linux_get_ipv4(const struct netdev *netdev, struct in_addr *ip,
1721 int cmd, const char *cmd_name)
1726 ifr.ifr_addr.sa_family = AF_INET;
1727 error = netdev_linux_do_ioctl(netdev, &ifr, cmd, cmd_name);
1729 const struct sockaddr_in *sin = (struct sockaddr_in *) &ifr.ifr_addr;
1730 *ip = sin->sin_addr;