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276d610c7632f32ac871893dff593412c7e64b97
libvirt/src/util/virnetdevtap.c
Laine Stump 276d610c76 util: fix tap device name auto-generation for FreeBSD 
The Linux implementation of virNetDevCreate() doesn't require a
template ifname (e.g. "vnet%d") when it is called, but just generates
a new name if ifname is empty. The FreeBSD implementation requires
that the caller actually fill in a template ifname, and will fail if
ifname is empty. Since we want to eliminate all the special code in
callers that is setting the template name, we need to make the
behavior of the FreeBSD virNetDevCreate() match the behavior of the
Linux virNetDevCreate().

The simplest way to do this is to use the new virNetDevGenerateName()
function - if ifname is empty it generates a new name with the proper
prefix, and if it's not empty, it leaves it alone.

Signed-off-by: Laine Stump <laine@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
2020-12-16 21:31:18 -05:00

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/*
* Copyright (C) 2007-2014 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#include "virmacaddr.h"
#include "virnetdevtap.h"
#include "virnetdev.h"
#include "virnetdevbridge.h"
#include "virnetdevmidonet.h"
#include "virnetdevopenvswitch.h"
#include "virerror.h"
#include "virfile.h"
#include "viralloc.h"
#include "virlog.h"
#include "virstring.h"
#include "datatypes.h"
#include <unistd.h>
#include <sys/types.h>
#ifndef WIN32
# include <sys/ioctl.h>
#endif
#ifdef WITH_NET_IF_H
# include <net/if.h>
#endif
#include <fcntl.h>
#ifdef __linux__
# include <linux/if_tun.h> /* IFF_TUN, IFF_NO_PI */
#elif defined(__FreeBSD__)
# include <net/if_mib.h>
# include <sys/sysctl.h>
#endif
#if defined(WITH_GETIFADDRS) && defined(AF_LINK)
# include <ifaddrs.h>
#endif
#define VIR_FROM_THIS VIR_FROM_NONE
VIR_LOG_INIT("util.netdevtap");
/**
* virNetDevTapGetName:
* @tapfd: a tun/tap file descriptor
* @ifname: a pointer that will receive the interface name
*
* Retrieve the interface name given a file descriptor for a tun/tap
* interface.
*
* Returns 0 if the interface name is successfully queried, -1 otherwise
*/
int
virNetDevTapGetName(int tapfd G_GNUC_UNUSED, char **ifname G_GNUC_UNUSED)
{
#ifdef TUNGETIFF
struct ifreq ifr;
if (ioctl(tapfd, TUNGETIFF, &ifr) < 0) {
virReportSystemError(errno, "%s",
_("Unable to query tap interface name"));
return -1;
}
*ifname = g_strdup(ifr.ifr_name);
return 0;
#else
return -1;
#endif
}
/**
* virNetDevTapGetRealDeviceName:
* @ifname: the interface name
*
* Lookup real interface name (i.e. name of the device entry in /dev),
* because e.g. on FreeBSD if we rename tap device to vnetN its device
* entry still remains unchanged (/dev/tapX), but bhyve needs a name
* that matches /dev entry.
*
* Returns the proper interface name or NULL if no corresponding interface
* found.
*/
char*
virNetDevTapGetRealDeviceName(char *ifname G_GNUC_UNUSED)
{
#ifdef IFDATA_DRIVERNAME
int ifindex = 0;
int name[6];
size_t len = 0;
char *ret = NULL;
if ((ifindex = if_nametoindex(ifname)) == 0) {
virReportSystemError(errno,
_("Unable to get interface index for '%s'"),
ifname);
return NULL;
}
name[0] = CTL_NET;
name[1] = PF_LINK;
name[2] = NETLINK_GENERIC;
name[3] = IFMIB_IFDATA;
name[4] = ifindex;
name[5] = IFDATA_DRIVERNAME;
if (sysctl(name, 6, NULL, &len, 0, 0) < 0) {
virReportSystemError(errno,
_("Unable to get driver name for '%s'"),
ifname);
return NULL;
}
ret = g_new0(char, len);
if (sysctl(name, 6, ret, &len, 0, 0) < 0) {
virReportSystemError(errno,
_("Unable to get driver name for '%s'"),
ifname);
VIR_FREE(ret);
return NULL;
}
return ret;
#else
return NULL;
#endif
}
#ifdef TUNSETIFF
/**
* virNetDevTapCreate:
* @ifname: the interface name
* @tunpath: path to the tun device (if NULL, /dev/net/tun is used)
* @tapfds: array of file descriptors return value for the new tap device
* @tapfdSize: number of file descriptors in @tapfd
* @flags: OR of virNetDevTapCreateFlags. Only one flag is recognized:
*
* VIR_NETDEV_TAP_CREATE_VNET_HDR
* - Enable IFF_VNET_HDR on the tap device
* VIR_NETDEV_TAP_CREATE_PERSIST
* - The device will persist after the file descriptor is closed
*
* Creates a tap interface. The caller must use virNetDevTapDelete to
* remove a persistent TAP device when it is no longer needed. In case
* @tapfdSize is greater than one, multiqueue extension is requested
* from kernel.
*
* Returns 0 in case of success or -1 on failure.
*/
int virNetDevTapCreate(char **ifname,
const char *tunpath,
int *tapfd,
size_t tapfdSize,
unsigned int flags)
{
size_t i = 0;
struct ifreq ifr;
int ret = -1;
int fd = -1;
/* if ifname is "vnet%d", then auto-generate a name for the new
* device (the kernel could do this for us, but has a bad habit of
* immediately re-using names that have just been released, which
* can lead to race conditions).
* if ifname is just a user-provided name, virNetDevGenerateName
* leaves it unchanged. */
if (virNetDevGenerateName(ifname, VIR_NET_DEV_GEN_NAME_VNET) < 0) {
return -1;
}
if (!tunpath)
tunpath = "/dev/net/tun";
memset(&ifr, 0, sizeof(ifr));
for (i = 0; i < tapfdSize; i++) {
if ((fd = open(tunpath, O_RDWR)) < 0) {
virReportSystemError(errno,
_("Unable to open %s, is tun module loaded?"),
tunpath);
goto cleanup;
}
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TAP | IFF_NO_PI;
/* If tapfdSize is greater than one, request multiqueue */
if (tapfdSize > 1)
ifr.ifr_flags |= IFF_MULTI_QUEUE;
if (flags & VIR_NETDEV_TAP_CREATE_VNET_HDR)
ifr.ifr_flags |= IFF_VNET_HDR;
if (virStrcpyStatic(ifr.ifr_name, *ifname) < 0) {
virReportSystemError(ERANGE,
_("Network interface name '%s' is too long"),
*ifname);
goto cleanup;
}
if (ioctl(fd, TUNSETIFF, &ifr) < 0) {
virReportSystemError(errno,
_("Unable to create tap device %s"),
NULLSTR(*ifname));
goto cleanup;
}
if (i == 0) {
/* In case we are looping more than once, set other
* TAPs to have the same name */
VIR_FREE(*ifname);
*ifname = g_strdup(ifr.ifr_name);
}
if ((flags & VIR_NETDEV_TAP_CREATE_PERSIST) &&
ioctl(fd, TUNSETPERSIST, 1) < 0) {
virReportSystemError(errno,
_("Unable to set tap device %s to persistent"),
NULLSTR(*ifname));
goto cleanup;
}
tapfd[i] = fd;
}
VIR_INFO("created device: '%s'", *ifname);
ret = 0;
cleanup:
if (ret < 0) {
VIR_FORCE_CLOSE(fd);
while (i--)
VIR_FORCE_CLOSE(tapfd[i]);
}
return ret;
}
int virNetDevTapDelete(const char *ifname,
const char *tunpath)
{
struct ifreq try;
int fd;
int ret = -1;
if (!tunpath)
tunpath = "/dev/net/tun";
if ((fd = open(tunpath, O_RDWR)) < 0) {
virReportSystemError(errno,
_("Unable to open %s, is tun module loaded?"),
tunpath);
return -1;
}
memset(&try, 0, sizeof(struct ifreq));
try.ifr_flags = IFF_TAP|IFF_NO_PI;
if (virStrcpyStatic(try.ifr_name, ifname) < 0) {
virReportSystemError(ERANGE,
_("Network interface name '%s' is too long"),
ifname);
goto cleanup;
}
if (ioctl(fd, TUNSETIFF, &try) < 0) {
virReportSystemError(errno, "%s",
_("Unable to associate TAP device"));
goto cleanup;
}
if (ioctl(fd, TUNSETPERSIST, 0) < 0) {
virReportSystemError(errno, "%s",
_("Unable to make TAP device non-persistent"));
goto cleanup;
}
VIR_INFO("delete device: '%s'", ifname);
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#elif defined(SIOCIFCREATE2) && defined(SIOCIFDESTROY) && defined(IF_MAXUNIT)
int virNetDevTapCreate(char **ifname,
const char *tunpath G_GNUC_UNUSED,
int *tapfd,
size_t tapfdSize,
unsigned int flags G_GNUC_UNUSED)
{
int s;
struct ifreq ifr;
int ret = -1;
if (tapfdSize > 1) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Multiqueue devices are not supported on this system"));
goto cleanup;
}
/* auto-generate an unused name for the new device (this
* is NOP if a name has been provided)
*/
if (virNetDevGenerateName(ifname, VIR_NET_DEV_GEN_NAME_VNET) < 0)
return -1;
/* As FreeBSD determines interface type by name,
* we have to create 'tap' interface first and
* then rename it to 'vnet'
*/
if ((s = virNetDevSetupControl("tap", &ifr)) < 0)
return -1;
if (ioctl(s, SIOCIFCREATE2, &ifr) < 0) {
virReportSystemError(errno, "%s",
_("Unable to create tap device"));
goto cleanup;
}
if (tapfd) {
g_autofree char *dev_path = NULL;
dev_path = g_strdup_printf("/dev/%s", ifr.ifr_name);
if ((*tapfd = open(dev_path, O_RDWR)) < 0) {
virReportSystemError(errno,
_("Unable to open %s"),
dev_path);
goto cleanup;
}
}
if (virNetDevSetName(ifr.ifr_name, *ifname) == -1)
goto cleanup;
ret = 0;
cleanup:
VIR_FORCE_CLOSE(s);
return ret;
}
int virNetDevTapDelete(const char *ifname,
const char *tunpath G_GNUC_UNUSED)
{
int s;
struct ifreq ifr;
int ret = -1;
if ((s = virNetDevSetupControl(ifname, &ifr)) < 0)
return -1;
if (ioctl(s, SIOCIFDESTROY, &ifr) < 0) {
virReportSystemError(errno,
_("Unable to remove tap device %s"),
ifname);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FORCE_CLOSE(s);
return ret;
}
#else
int virNetDevTapCreate(char **ifname G_GNUC_UNUSED,
const char *tunpath G_GNUC_UNUSED,
int *tapfd G_GNUC_UNUSED,
size_t tapfdSize G_GNUC_UNUSED,
unsigned int flags G_GNUC_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to create TAP devices on this platform"));
return -1;
}
int virNetDevTapDelete(const char *ifname G_GNUC_UNUSED,
const char *tunpath G_GNUC_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to delete TAP devices on this platform"));
return -1;
}
#endif
/**
* virNetDevTapAttachBridge:
* @tapname: the tap interface name (or name template)
* @brname: the bridge name
* @macaddr: desired MAC address
* @virtPortProfile: bridge/port specific configuration
* @virtVlan: vlan tag info
* @mtu: requested MTU for port (or 0 for "default")
* @actualMTU: MTU actually set for port (after accounting for bridge's MTU)
*
* This attaches an existing tap device (@tapname) to a bridge
* (@brname).
*
* Returns 0 in case of success or -1 on failure
*/
int
virNetDevTapAttachBridge(const char *tapname,
const char *brname,
const virMacAddr *macaddr,
const unsigned char *vmuuid,
const virNetDevVPortProfile *virtPortProfile,
const virNetDevVlan *virtVlan,
virTristateBool isolatedPort,
unsigned int mtu,
unsigned int *actualMTU)
{
/* If an MTU is specified for the new device, set it before
* attaching the device to the bridge, as it may affect the MTU of
* the bridge (in particular if it is the first device attached to
* the bridge, or if it is smaller than the current MTU of the
* bridge). If MTU isn't specified for the new device (i.e. 0),
* we need to set the interface MTU to the current MTU of the
* bridge (to avoid inadvertently changing the bridge's MTU).
*/
if (mtu > 0) {
if (virNetDevSetMTU(tapname, mtu) < 0)
return -1;
} else {
if (virNetDevSetMTUFromDevice(tapname, brname) < 0)
return -1;
}
if (actualMTU) {
int retMTU = virNetDevGetMTU(tapname);
if (retMTU < 0)
return -1;
*actualMTU = retMTU;
}
if (virtPortProfile) {
if (virtPortProfile->virtPortType == VIR_NETDEV_VPORT_PROFILE_MIDONET) {
if (virNetDevMidonetBindPort(tapname, virtPortProfile) < 0)
return -1;
} else if (virtPortProfile->virtPortType == VIR_NETDEV_VPORT_PROFILE_OPENVSWITCH) {
if (virNetDevOpenvswitchAddPort(brname, tapname, macaddr, vmuuid,
virtPortProfile, virtVlan) < 0)
return -1;
}
} else {
if (virNetDevBridgeAddPort(brname, tapname) < 0)
return -1;
if (isolatedPort == VIR_TRISTATE_BOOL_YES &&
virNetDevBridgePortSetIsolated(brname, tapname, true) < 0) {
virErrorPtr err;
virErrorPreserveLast(&err);
ignore_value(virNetDevBridgeRemovePort(brname, tapname));
virErrorRestore(&err);
return -1;
}
}
return 0;
}
/**
* virNetDevTapReattachBridge:
* @tapname: the tap interface name (or name template)
* @brname: the bridge name
* @macaddr: desired MAC address
* @virtPortProfile: bridge/port specific configuration
* @virtVlan: vlan tag info
* @mtu: requested MTU for port (or 0 for "default")
* @actualMTU: MTU actually set for port (after accounting for bridge's MTU)
*
* Ensures that the tap device (@tapname) is connected to the bridge
* (@brname), potentially removing it from any existing bridge that
* does not match.
*
* Returns 0 in case of success or -1 on failure
*/
int
virNetDevTapReattachBridge(const char *tapname,
const char *brname,
const virMacAddr *macaddr,
const unsigned char *vmuuid,
const virNetDevVPortProfile *virtPortProfile,
const virNetDevVlan *virtVlan,
virTristateBool isolatedPort,
unsigned int mtu,
unsigned int *actualMTU)
{
bool useOVS = false;
g_autofree char *master = NULL;
if (virNetDevGetMaster(tapname, &master) < 0)
return -1;
/* IFLA_MASTER for a tap on an OVS switch is always "ovs-system" */
if (STREQ_NULLABLE(master, "ovs-system")) {
useOVS = true;
if (virNetDevOpenvswitchInterfaceGetMaster(tapname, &master) < 0)
return -1;
}
/* Nothing more todo if we're on the right bridge already */
if (STREQ_NULLABLE(brname, master))
return 0;
/* disconnect from current (incorrect) bridge, if any */
if (master) {
int ret;
VIR_INFO("Removing %s from %s", tapname, master);
if (useOVS)
ret = virNetDevOpenvswitchRemovePort(master, tapname);
else
ret = virNetDevBridgeRemovePort(master, tapname);
if (ret < 0)
return -1;
}
VIR_INFO("Attaching %s to %s", tapname, brname);
if (virNetDevTapAttachBridge(tapname, brname,
macaddr, vmuuid,
virtPortProfile,
virtVlan,
isolatedPort,
mtu, actualMTU) < 0)
return -1;
return 0;
}
/**
* virNetDevTapCreateInBridgePort:
* @brname: the bridge name
* @ifname: the interface name (or name template)
* @macaddr: desired MAC address
* @tunpath: path to the tun device (if NULL, /dev/net/tun is used)
* @tapfd: array of file descriptor return value for the new tap device
* @tapfdSize: number of file descriptors in @tapfd
* @virtPortProfile: bridge/port specific configuration
* @coalesce: optional coalesce parameters
* @mtu: requested MTU for port (or 0 for "default")
* @actualMTU: MTU actually set for port (after accounting for bridge's MTU)
* @flags: OR of virNetDevTapCreateFlags:
* VIR_NETDEV_TAP_CREATE_IFUP
* - Bring the interface up
* VIR_NETDEV_TAP_CREATE_VNET_HDR
* - Enable IFF_VNET_HDR on the tap device
* VIR_NETDEV_TAP_CREATE_USE_MAC_FOR_BRIDGE
* - Set this interface's MAC as the bridge's MAC address
* VIR_NETDEV_TAP_CREATE_PERSIST
* - The device will persist after the file descriptor is closed
*
* This function creates a new tap device on a bridge. @ifname can be either
* a fixed name or a name template with '%d' for dynamic name allocation.
* in either case the final name for the bridge will be stored in @ifname.
* If the @tapfd parameter is supplied, the open tap device file descriptor
* will be returned, otherwise the TAP device will be closed. The caller must
* use virNetDevTapDelete to remove a persistent TAP device when it is no
* longer needed.
*
* Returns 0 in case of success or -1 on failure
*/
int virNetDevTapCreateInBridgePort(const char *brname,
char **ifname,
const virMacAddr *macaddr,
const unsigned char *vmuuid,
const char *tunpath,
int *tapfd,
size_t tapfdSize,
const virNetDevVPortProfile *virtPortProfile,
const virNetDevVlan *virtVlan,
virTristateBool isolatedPort,
virNetDevCoalescePtr coalesce,
unsigned int mtu,
unsigned int *actualMTU,
unsigned int flags)
{
virMacAddr tapmac;
size_t i;
if (virNetDevTapCreate(ifname, tunpath, tapfd, tapfdSize, flags) < 0)
return -1;
/* We need to set the interface MAC before adding it
* to the bridge, because the bridge assumes the lowest
* MAC of all enslaved interfaces & we don't want it
* seeing the kernel allocate random MAC for the TAP
* device before we set our static MAC.
*/
virMacAddrSet(&tapmac, macaddr);
if (!(flags & VIR_NETDEV_TAP_CREATE_USE_MAC_FOR_BRIDGE)) {
/* The tap device's MAC address cannot match the MAC address
* used by the guest. This results in "received packet on
* vnetX with own address as source address" error logs from
* the kernel. Making the tap address as high as possible
* discourages the bridge from using this tap's MAC as its own
* (a Linux host bridge will take on the lowest numbered MAC
* of all devices attached to it).
*/
if (tapmac.addr[0] == 0xFE)
tapmac.addr[0] = 0xFA;
else
tapmac.addr[0] = 0xFE;
}
if (virNetDevSetMAC(*ifname, &tapmac) < 0)
goto error;
if (virNetDevTapAttachBridge(*ifname, brname, macaddr, vmuuid,
virtPortProfile, virtVlan,
isolatedPort, mtu, actualMTU) < 0) {
goto error;
}
if (virNetDevSetOnline(*ifname, !!(flags & VIR_NETDEV_TAP_CREATE_IFUP)) < 0)
goto error;
if (virNetDevSetCoalesce(*ifname, coalesce, false) < 0)
goto error;
return 0;
error:
for (i = 0; i < tapfdSize && tapfd[i] >= 0; i++)
VIR_FORCE_CLOSE(tapfd[i]);
return -1;
}
/*-------------------- interface stats --------------------*/
/**
* virNetDevTapInterfaceStats:
* @ifname: interface
* @stats: where to store statistics
* @swapped: whether to swap RX/TX fields
*
* Fetch RX/TX statistics for given named interface (@ifname) and
* store them at @stats. The returned statistics are always from
* domain POV. Because in some cases this means swapping RX/TX in
* the stats and in others this means no swapping (consider TAP
* vs macvtap) caller might choose if the returned stats should
* be @swapped or not.
*
* Returns 0 on success, -1 otherwise (with error reported).
*/
#ifdef __linux__
int
virNetDevTapInterfaceStats(const char *ifname,
virDomainInterfaceStatsPtr stats,
bool swapped)
{
int ifname_len;
FILE *fp;
char line[256], *colon;
if (!ifname) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Interface name not provided"));
return -1;
}
fp = fopen("/proc/net/dev", "r");
if (!fp) {
virReportSystemError(errno, "%s",
_("Could not open /proc/net/dev"));
return -1;
}
ifname_len = strlen(ifname);
while (fgets(line, sizeof(line), fp)) {
long long dummy;
long long rx_bytes;
long long rx_packets;
long long rx_errs;
long long rx_drop;
long long tx_bytes;
long long tx_packets;
long long tx_errs;
long long tx_drop;
/* The line looks like:
* " eth0:..."
* Split it at the colon.
*/
colon = strchr(line, ':');
if (!colon) continue;
*colon = '\0';
if (colon-ifname_len >= line &&
STREQ(colon-ifname_len, ifname)) {
if (sscanf(colon+1,
"%lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld %lld",
&rx_bytes, &rx_packets, &rx_errs, &rx_drop,
&dummy, &dummy, &dummy, &dummy,
&tx_bytes, &tx_packets, &tx_errs, &tx_drop,
&dummy, &dummy, &dummy, &dummy) != 16)
continue;
if (swapped) {
stats->rx_bytes = tx_bytes;
stats->rx_packets = tx_packets;
stats->rx_errs = tx_errs;
stats->rx_drop = tx_drop;
stats->tx_bytes = rx_bytes;
stats->tx_packets = rx_packets;
stats->tx_errs = rx_errs;
stats->tx_drop = rx_drop;
} else {
stats->rx_bytes = rx_bytes;
stats->rx_packets = rx_packets;
stats->rx_errs = rx_errs;
stats->rx_drop = rx_drop;
stats->tx_bytes = tx_bytes;
stats->tx_packets = tx_packets;
stats->tx_errs = tx_errs;
stats->tx_drop = tx_drop;
}
VIR_FORCE_FCLOSE(fp);
return 0;
}
}
VIR_FORCE_FCLOSE(fp);
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("/proc/net/dev: Interface not found"));
return -1;
}
#elif defined(WITH_GETIFADDRS) && defined(AF_LINK)
int
virNetDevTapInterfaceStats(const char *ifname,
virDomainInterfaceStatsPtr stats,
bool swapped)
{
struct ifaddrs *ifap, *ifa;
struct if_data *ifd;
int ret = -1;
if (!ifname) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Interface name not provided"));
return -1;
}
if (getifaddrs(&ifap) < 0) {
virReportSystemError(errno, "%s",
_("Could not get interface list"));
return -1;
}
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
if (!ifa->ifa_addr)
continue;
if (ifa->ifa_addr->sa_family != AF_LINK)
continue;
if (STREQ(ifa->ifa_name, ifname)) {
ifd = (struct if_data *)ifa->ifa_data;
if (swapped) {
stats->tx_bytes = ifd->ifi_ibytes;
stats->tx_packets = ifd->ifi_ipackets;
stats->tx_errs = ifd->ifi_ierrors;
stats->tx_drop = ifd->ifi_iqdrops;
stats->rx_bytes = ifd->ifi_obytes;
stats->rx_packets = ifd->ifi_opackets;
stats->rx_errs = ifd->ifi_oerrors;
# ifndef __APPLE__
stats->rx_drop = ifd->ifi_oqdrops;
# else
stats->rx_drop = 0;
# endif
} else {
stats->tx_bytes = ifd->ifi_obytes;
stats->tx_packets = ifd->ifi_opackets;
stats->tx_errs = ifd->ifi_oerrors;
# ifndef __APPLE__
stats->tx_drop = ifd->ifi_oqdrops;
# else
stats->tx_drop = 0;
# endif
stats->rx_bytes = ifd->ifi_ibytes;
stats->rx_packets = ifd->ifi_ipackets;
stats->rx_errs = ifd->ifi_ierrors;
stats->rx_drop = ifd->ifi_iqdrops;
}
ret = 0;
break;
}
}
if (ret < 0)
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("Interface not found"));
freeifaddrs(ifap);
return ret;
}
#else
int
virNetDevTapInterfaceStats(const char *ifname G_GNUC_UNUSED,
virDomainInterfaceStatsPtr stats G_GNUC_UNUSED,
bool swapped G_GNUC_UNUSED)
{
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
_("interface stats not implemented on this platform"));
return -1;
}
#endif /* __linux__ */
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