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3a7440bdc7
libvirt/src/util/virnetdev.c
Ján Tomko 3a7440bdc7 Split out virNetDevGetEthtoolGFeatures 
Move out the code depending on HAVE_DECL_ETHTOOL_GFEATURES.
2016-06-07 14:13:11 +02:00

3447 lines
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/*
* Copyright (C) 2007-2016 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/>.
*
* Authors:
* Mark McLoughlin <markmc@redhat.com>
* Daniel P. Berrange <berrange@redhat.com>
*/
#include <config.h>
#include "virnetdev.h"
#include "virmacaddr.h"
#include "virfile.h"
#include "virerror.h"
#include "vircommand.h"
#include "viralloc.h"
#include "virpci.h"
#include "virlog.h"
#include "virstring.h"
#include "virutil.h"
#if HAVE_GETIFADDRS
# include <ifaddrs.h>
#endif
#include <sys/ioctl.h>
#include <net/if.h>
#include <fcntl.h>
#ifdef __linux__
# include <linux/sockios.h>
# include <linux/if_vlan.h>
# define VIR_NETDEV_FAMILY AF_PACKET
#elif defined(HAVE_STRUCT_IFREQ) && defined(AF_LOCAL)
# define VIR_NETDEV_FAMILY AF_LOCAL
#else
# undef HAVE_STRUCT_IFREQ
#endif
#if defined(SIOCETHTOOL) && defined(HAVE_STRUCT_IFREQ)
# include <linux/types.h>
# include <linux/ethtool.h>
#endif
#if HAVE_DECL_LINK_ADDR
# include <sys/sockio.h>
# include <net/if_dl.h>
#endif
#ifndef IFNAMSIZ
# define IFNAMSIZ 16
#endif
#define VIR_FROM_THIS VIR_FROM_NONE
VIR_LOG_INIT("util.netdev");
#define PROC_NET_DEV_MCAST "/proc/net/dev_mcast"
#define MAX_MCAST_SIZE 50*14336
#define VIR_MCAST_NAME_LEN (IFNAMSIZ + 1)
#define VIR_MCAST_TOKEN_DELIMS " \n"
#define VIR_MCAST_ADDR_LEN (VIR_MAC_HEXLEN + 1)
#if defined(SIOCSIFFLAGS) && defined(HAVE_STRUCT_IFREQ)
# define VIR_IFF_UP IFF_UP
# define VIR_IFF_PROMISC IFF_PROMISC
# define VIR_IFF_MULTICAST IFF_MULTICAST
# define VIR_IFF_ALLMULTI IFF_ALLMULTI
#else
# define VIR_IFF_UP 0
# define VIR_IFF_PROMISC 0
# define VIR_IFF_MULTICAST 0
# define VIR_IFF_ALLMULTI 0
#endif
#define RESOURCE_FILE_LEN 4096
#if HAVE_DECL_ETHTOOL_GFEATURES
# define TX_UDP_TNL 25
# define GFEATURES_SIZE 2
# define FEATURE_WORD(blocks, index, field) ((blocks)[(index) / 32U].field)
# define FEATURE_FIELD_FLAG(index) (1U << (index) % 32U)
# define FEATURE_BIT_IS_SET(blocks, index, field) \
(FEATURE_WORD(blocks, index, field) & FEATURE_FIELD_FLAG(index))
#endif
#define VIR_DAD_WAIT_TIMEOUT 20 /* seconds */
typedef enum {
VIR_MCAST_TYPE_INDEX_TOKEN,
VIR_MCAST_TYPE_NAME_TOKEN,
VIR_MCAST_TYPE_USERS_TOKEN,
VIR_MCAST_TYPE_GLOBAL_TOKEN,
VIR_MCAST_TYPE_ADDR_TOKEN,
VIR_MCAST_TYPE_LAST
} virMCastType;
typedef struct _virNetDevMcastEntry virNetDevMcastEntry;
typedef virNetDevMcastEntry *virNetDevMcastEntryPtr;
struct _virNetDevMcastEntry {
int idx;
char name[VIR_MCAST_NAME_LEN];
int users;
bool global;
virMacAddr macaddr;
};
typedef struct _virNetDevMcastList virNetDevMcastList;
typedef virNetDevMcastList *virNetDevMcastListPtr;
struct _virNetDevMcastList {
size_t nentries;
virNetDevMcastEntryPtr *entries;
};
#if defined(HAVE_STRUCT_IFREQ)
static int virNetDevSetupControlFull(const char *ifname,
struct ifreq *ifr,
int domain,
int type)
{
int fd;
if (ifr && ifname) {
memset(ifr, 0, sizeof(*ifr));
if (virStrcpyStatic(ifr->ifr_name, ifname) == NULL) {
virReportSystemError(ERANGE,
_("Network interface name '%s' is too long"),
ifname);
return -1;
}
}
if ((fd = socket(domain, type, 0)) < 0) {
virReportSystemError(errno, "%s",
_("Cannot open network interface control socket"));
return -1;
}
if (virSetInherit(fd, false) < 0) {
virReportSystemError(errno, "%s",
_("Cannot set close-on-exec flag for socket"));
VIR_FORCE_CLOSE(fd);
return -1;
}
return fd;
}
int
virNetDevSetupControl(const char *ifname,
struct ifreq *ifr)
{
return virNetDevSetupControlFull(ifname, ifr, VIR_NETDEV_FAMILY, SOCK_DGRAM);
}
#else /* !HAVE_STRUCT_IFREQ */
int
virNetDevSetupControl(const char *ifname ATTRIBUTE_UNUSED,
void *ifr ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Network device configuration is not supported "
"on this platform"));
return -1;
}
#endif /* HAVE_STRUCT_IFREQ */
#if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ)
/**
* virNetDevExists:
* @ifname
*
* Check if the network device @ifname exists
*
* Returns 1 if it exists, 0 if it does not, -1 on error
*/
int virNetDevExists(const char *ifname)
{
int fd = -1;
int ret = -1;
struct ifreq ifr;
if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
return -1;
if (ioctl(fd, SIOCGIFFLAGS, &ifr)) {
if (errno == ENODEV || errno == ENXIO)
ret = 0;
else
virReportSystemError(errno,
_("Unable to check interface flags for %s"), ifname);
goto cleanup;
}
ret = 1;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#else
int virNetDevExists(const char *ifname)
{
virReportSystemError(ENOSYS,
_("Unable to check interface %s"), ifname);
return -1;
}
#endif
#if defined(SIOCGIFHWADDR) && defined(SIOCSIFHWADDR) && \
defined(HAVE_STRUCT_IFREQ)
/**
* virNetDevSetMAC:
* @ifname: interface name to set MTU for
* @macaddr: MAC address
*
* This function sets the @macaddr for a given interface @ifname. This
* gets rid of the kernel's automatically assigned random MAC.
*
* Returns 0 in case of success or -1 on failure
*/
int virNetDevSetMAC(const char *ifname,
const virMacAddr *macaddr)
{
int fd = -1;
int ret = -1;
struct ifreq ifr;
if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
return -1;
/* To fill ifr.ifr_hdaddr.sa_family field */
if (ioctl(fd, SIOCGIFHWADDR, &ifr) < 0) {
virReportSystemError(errno,
_("Cannot get interface MAC on '%s'"),
ifname);
goto cleanup;
}
virMacAddrGetRaw(macaddr, (unsigned char *)ifr.ifr_hwaddr.sa_data);
if (ioctl(fd, SIOCSIFHWADDR, &ifr) < 0) {
char macstr[VIR_MAC_STRING_BUFLEN];
virReportSystemError(errno,
_("Cannot set interface MAC to %s on '%s'"),
virMacAddrFormat(macaddr, macstr), ifname);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#elif defined(SIOCSIFLLADDR) && defined(HAVE_STRUCT_IFREQ) && \
HAVE_DECL_LINK_ADDR
int virNetDevSetMAC(const char *ifname,
const virMacAddr *macaddr)
{
struct ifreq ifr;
struct sockaddr_dl sdl;
char mac[VIR_MAC_STRING_BUFLEN + 1] = ":";
int s;
int ret = -1;
if ((s = virNetDevSetupControl(ifname, &ifr)) < 0)
return -1;
virMacAddrFormat(macaddr, mac + 1);
sdl.sdl_len = sizeof(sdl);
link_addr(mac, &sdl);
memcpy(ifr.ifr_addr.sa_data, sdl.sdl_data, VIR_MAC_BUFLEN);
ifr.ifr_addr.sa_len = VIR_MAC_BUFLEN;
if (ioctl(s, SIOCSIFLLADDR, &ifr) < 0) {
virReportSystemError(errno,
_("Cannot set interface MAC to %s on '%s'"),
mac + 1, ifname);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FORCE_CLOSE(s);
return ret;
}
#else
int virNetDevSetMAC(const char *ifname,
const virMacAddr *macaddr ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS,
_("Cannot set interface MAC on '%s'"),
ifname);
return -1;
}
#endif
#if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ)
/**
* virNetDevGetMAC:
* @ifname: interface name to set MTU for
* @macaddr: MAC address
*
* This function gets the @macaddr for a given interface @ifname.
*
* Returns 0 in case of success or -1 on failure
*/
int virNetDevGetMAC(const char *ifname,
virMacAddrPtr macaddr)
{
int fd = -1;
int ret = -1;
struct ifreq ifr;
if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
return -1;
if (ioctl(fd, SIOCGIFHWADDR, &ifr) < 0) {
virReportSystemError(errno,
_("Cannot get interface MAC on '%s'"),
ifname);
goto cleanup;
}
virMacAddrSetRaw(macaddr, (unsigned char *)ifr.ifr_hwaddr.sa_data);
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#else
int virNetDevGetMAC(const char *ifname,
virMacAddrPtr macaddr ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS,
_("Cannot get interface MAC on '%s'"),
ifname);
return -1;
}
#endif
/**
* virNetDevReplaceMacAddress:
* @macaddress: new MAC address for interface
* @linkdev: name of interface
* @stateDir: directory to store old MAC address
*
* Returns 0 on success, -1 on failure
*
*/
int
virNetDevReplaceMacAddress(const char *linkdev,
const virMacAddr *macaddress,
const char *stateDir)
{
virMacAddr oldmac;
char *path = NULL;
char macstr[VIR_MAC_STRING_BUFLEN];
int ret = -1;
if (virNetDevGetMAC(linkdev, &oldmac) < 0)
return -1;
if (virAsprintf(&path, "%s/%s",
stateDir,
linkdev) < 0)
return -1;
virMacAddrFormat(&oldmac, macstr);
if (virFileWriteStr(path, macstr, O_CREAT|O_TRUNC|O_WRONLY) < 0) {
virReportSystemError(errno, _("Unable to preserve mac for %s"),
linkdev);
goto cleanup;
}
if (virNetDevSetMAC(linkdev, macaddress) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FREE(path);
return ret;
}
/**
* virNetDevRestoreMacAddress:
* @linkdev: name of interface
* @stateDir: directory containing old MAC address
*
* Returns 0 on success, -errno on failure.
*
*/
int
virNetDevRestoreMacAddress(const char *linkdev,
const char *stateDir)
{
int rc = -1;
char *oldmacname = NULL;
char *macstr = NULL;
char *path = NULL;
virMacAddr oldmac;
if (virAsprintf(&path, "%s/%s",
stateDir,
linkdev) < 0)
return -1;
if (virFileReadAll(path, VIR_MAC_STRING_BUFLEN, &macstr) < 0)
goto cleanup;
if (virMacAddrParse(macstr, &oldmac) != 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Cannot parse MAC address from '%s'"),
oldmacname);
goto cleanup;
}
/*reset mac and remove file-ignore results*/
rc = virNetDevSetMAC(linkdev, &oldmac);
ignore_value(unlink(path));
cleanup:
VIR_FREE(macstr);
VIR_FREE(path);
return rc;
}
#if defined(SIOCGIFMTU) && defined(HAVE_STRUCT_IFREQ)
/**
* virNetDevGetMTU:
* @ifname: interface name get MTU for
*
* This function gets the @mtu value set for a given interface @ifname.
*
* Returns the MTU value in case of success, or -1 on failure.
*/
int virNetDevGetMTU(const char *ifname)
{
int fd = -1;
int ret = -1;
struct ifreq ifr;
if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
return -1;
if (ioctl(fd, SIOCGIFMTU, &ifr) < 0) {
virReportSystemError(errno,
_("Cannot get interface MTU on '%s'"),
ifname);
goto cleanup;
}
ret = ifr.ifr_mtu;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#else
int virNetDevGetMTU(const char *ifname)
{
virReportSystemError(ENOSYS,
_("Cannot get interface MTU on '%s'"),
ifname);
return -1;
}
#endif
#if defined(SIOCSIFMTU) && defined(HAVE_STRUCT_IFREQ)
/**
* virNetDevSetMTU:
* @ifname: interface name to set MTU for
* @mtu: MTU value
*
* This function sets the @mtu for a given interface @ifname. Typically
* used on a tap device to set up for Jumbo Frames.
*
* Returns 0 in case of success, or -1 on failure
*/
int virNetDevSetMTU(const char *ifname, int mtu)
{
int fd = -1;
int ret = -1;
struct ifreq ifr;
if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
return -1;
ifr.ifr_mtu = mtu;
if (ioctl(fd, SIOCSIFMTU, &ifr) < 0) {
virReportSystemError(errno,
_("Cannot set interface MTU on '%s'"),
ifname);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#else
int virNetDevSetMTU(const char *ifname, int mtu ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS,
_("Cannot set interface MTU on '%s'"),
ifname);
return -1;
}
#endif
/**
* virNetDevSetMTUFromDevice:
* @ifname: name of the interface whose MTU we want to set
* @otherifname: name of the interface whose MTU we want to copy
*
* Sets the interface mtu to the same MTU as another interface
*
* Returns 0 in case of success, or -1 on failure
*/
int virNetDevSetMTUFromDevice(const char *ifname,
const char *otherifname)
{
int mtu = virNetDevGetMTU(otherifname);
if (mtu < 0)
return -1;
return virNetDevSetMTU(ifname, mtu);
}
/**
* virNetDevSetNamespace:
* @ifname: name of device
* @pidInNs: PID of process in target net namespace
*
* Moves the given device into the target net namespace specified by the given
* pid using this command:
* ip link set @iface netns @pidInNs
*
* Returns 0 on success or -1 in case of error
*/
int virNetDevSetNamespace(const char *ifname, pid_t pidInNs)
{
int ret = -1;
char *pid = NULL;
char *phy = NULL;
char *phy_path = NULL;
int len;
if (virAsprintf(&pid, "%lld", (long long) pidInNs) == -1)
return -1;
/* The 802.11 wireless devices only move together with their PHY. */
if (virNetDevSysfsFile(&phy_path, ifname, "phy80211/name") < 0)
goto cleanup;
if ((len = virFileReadAllQuiet(phy_path, 1024, &phy)) <= 0) {
/* Not a wireless device. */
const char *argv[] = {
"ip", "link", "set", ifname, "netns", NULL, NULL
};
argv[5] = pid;
if (virRun(argv, NULL) < 0)
goto cleanup;
} else {
const char *argv[] = {
"iw", "phy", NULL, "set", "netns", NULL, NULL
};
/* Remove a line break. */
phy[len - 1] = '\0';
argv[2] = phy;
argv[5] = pid;
if (virRun(argv, NULL) < 0)
goto cleanup;
}
ret = 0;
cleanup:
VIR_FREE(phy_path);
VIR_FREE(phy);
VIR_FREE(pid);
return ret;
}
#if defined(SIOCSIFNAME) && defined(HAVE_STRUCT_IFREQ)
/**
* virNetDevSetName:
* @ifname: name of device
* @newifname: new name of @ifname
*
* Changes the name of the given device.
*
* Returns 0 on success, -1 on error
*/
int virNetDevSetName(const char* ifname, const char *newifname)
{
int fd = -1;
int ret = -1;
struct ifreq ifr;
if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
return -1;
# ifdef HAVE_STRUCT_IFREQ_IFR_NEWNAME
if (virStrcpyStatic(ifr.ifr_newname, newifname) == NULL) {
virReportSystemError(ERANGE,
_("Network interface name '%s' is too long"),
newifname);
goto cleanup;
}
# else
ifr.ifr_data = (caddr_t)newifname;
# endif
if (ioctl(fd, SIOCSIFNAME, &ifr)) {
virReportSystemError(errno,
_("Unable to rename '%s' to '%s'"),
ifname, newifname);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#else
int virNetDevSetName(const char* ifname, const char *newifname)
{
virReportSystemError(ENOSYS,
_("Cannot rename interface '%s' to '%s' on this platform"),
ifname, newifname);
return -1;
}
#endif
#if defined(SIOCSIFFLAGS) && defined(HAVE_STRUCT_IFREQ)
static int
virNetDevSetIFFlag(const char *ifname, int flag, bool val)
{
int fd = -1;
int ret = -1;
struct ifreq ifr;
int ifflags;
if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
return -1;
if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
virReportSystemError(errno,
_("Cannot get interface flags on '%s'"),
ifname);
goto cleanup;
}
if (val)
ifflags = ifr.ifr_flags | flag;
else
ifflags = ifr.ifr_flags & ~flag;
if (ifr.ifr_flags != ifflags) {
ifr.ifr_flags = ifflags;
if (ioctl(fd, SIOCSIFFLAGS, &ifr) < 0) {
virReportSystemError(errno,
_("Cannot set interface flags on '%s'"),
ifname);
goto cleanup;
}
}
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#else
static int
virNetDevSetIFFlag(const char *ifname,
int flag ATTRIBUTE_UNUSED,
bool val ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS,
_("Cannot set interface flags on '%s'"),
ifname);
return -1;
}
#endif
/**
* virNetDevSetOnline:
* @ifname: the interface name
* @online: true for up, false for down
*
* Function to control if an interface is activated (up, true) or not (down, false)
*
* Returns 0 in case of success or -1 on error.
*/
int
virNetDevSetOnline(const char *ifname,
bool online)
{
return virNetDevSetIFFlag(ifname, VIR_IFF_UP, online);
}
/**
* virNetDevSetPromiscuous:
* @ifname: the interface name
* @promiscuous: true for receive all packets, false for do not receive
* all packets
*
* Function to control if an interface is to receive all
* packets (receive all, true) or not (do not receive all, false)
*
* Returns 0 in case of success or -1 on error.
*/
int
virNetDevSetPromiscuous(const char *ifname,
bool promiscuous)
{
return virNetDevSetIFFlag(ifname, VIR_IFF_PROMISC, promiscuous);
}
/**
* virNetDevSetRcvMulti:
* @ifname: the interface name
* @:receive true for receive multicast packets, false for do not receive
* multicast packets
*
* Function to control if an interface is to receive multicast
* packets in which it is interested (receive, true)
* or not (do not receive, false)
*
* Returns 0 in case of success or -1 on error.
*/
int
virNetDevSetRcvMulti(const char *ifname,
bool receive)
{
return virNetDevSetIFFlag(ifname, VIR_IFF_MULTICAST, receive);
}
/**
* virNetDevSetRcvAllMulti:
* @ifname: the interface name
* @:receive true for receive all packets, false for do not receive all packets
*
* Function to control if an interface is to receive all multicast
* packets (receive, true) or not (do not receive, false)
*
* Returns 0 in case of success or -1 on error.
*/
int
virNetDevSetRcvAllMulti(const char *ifname,
bool receive)
{
return virNetDevSetIFFlag(ifname, VIR_IFF_ALLMULTI, receive);
}
#if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ)
static int
virNetDevGetIFFlag(const char *ifname, int flag, bool *val)
{
int fd = -1;
int ret = -1;
struct ifreq ifr;
if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
return -1;
if (ioctl(fd, SIOCGIFFLAGS, &ifr) < 0) {
virReportSystemError(errno,
_("Cannot get interface flags on '%s'"),
ifname);
goto cleanup;
}
*val = (ifr.ifr_flags & flag) ? true : false;
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#else
static int
virNetDevGetIFFlag(const char *ifname,
int flag ATTRIBUTE_UNUSED,
bool *val ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS,
_("Cannot get interface flags on '%s'"),
ifname);
return -1;
}
#endif
/**
* virNetDevGetOnline:
* @ifname: the interface name
* @online: where to store the status
*
* Function to query if an interface is activated (true) or not (false)
*
* Returns 0 in case of success or an errno code in case of failure.
*/
int
virNetDevGetOnline(const char *ifname,
bool *online)
{
return virNetDevGetIFFlag(ifname, VIR_IFF_UP, online);
}
/**
* virNetDevIsPromiscuous:
* @ifname: the interface name
* @promiscuous: where to store the status
*
* Function to query if an interface is receiving all packets (true) or
* not (false)
*
* Returns 0 in case of success or an errno code in case of failure.
*/
int
virNetDevGetPromiscuous(const char *ifname,
bool *promiscuous)
{
return virNetDevGetIFFlag(ifname, VIR_IFF_PROMISC, promiscuous);
}
/**
* virNetDevIsRcvMulti:
* @ifname: the interface name
* @receive where to store the status
*
* Function to query whether an interface is receiving multicast packets (true)
* in which it is interested, or not (false)
*
* Returns 0 in case of success or -1 on error.
*/
int
virNetDevGetRcvMulti(const char *ifname,
bool *receive)
{
return virNetDevGetIFFlag(ifname, VIR_IFF_MULTICAST, receive);
}
/**
* virNetDevIsRcvAllMulti:
* @ifname: the interface name
* @:receive where to store the status
*
* Function to query whether an interface is receiving all multicast
* packets (receiving, true) or not (is not receiving, false)
*
* Returns 0 in case of success or -1 on error.
*/
int
virNetDevGetRcvAllMulti(const char *ifname,
bool *receive)
{
return virNetDevGetIFFlag(ifname, VIR_IFF_ALLMULTI, receive);
}
/**
* virNetDevGetIndex:
* @ifname : Name of the interface whose index is to be found
* @ifindex: Pointer to int where the index will be written into
*
* Get the index of an interface given its name.
*
* Returns 0 on success, -1 on failure
*/
#if defined(SIOCGIFINDEX) && defined(HAVE_STRUCT_IFREQ)
int virNetDevGetIndex(const char *ifname, int *ifindex)
{
int ret = -1;
struct ifreq ifreq;
int fd = socket(VIR_NETDEV_FAMILY, SOCK_DGRAM, 0);
if (fd < 0) {
virReportSystemError(errno, "%s",
_("Unable to open control socket"));
return -1;
}
memset(&ifreq, 0, sizeof(ifreq));
if (virStrncpy(ifreq.ifr_name, ifname, strlen(ifname),
sizeof(ifreq.ifr_name)) == NULL) {
virReportSystemError(ERANGE,
_("invalid interface name %s"),
ifname);
goto cleanup;
}
if (ioctl(fd, SIOCGIFINDEX, &ifreq) < 0) {
virReportSystemError(errno,
_("Unable to get index for interface %s"), ifname);
goto cleanup;
}
# ifdef HAVE_STRUCT_IFREQ_IFR_INDEX
*ifindex = ifreq.ifr_index;
# else
*ifindex = ifreq.ifr_ifindex;
# endif
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#else /* ! SIOCGIFINDEX */
int virNetDevGetIndex(const char *ifname ATTRIBUTE_UNUSED,
int *ifindex ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to get interface index on this platform"));
return -1;
}
#endif /* ! SIOCGIFINDEX */
#if defined(SIOCGIFVLAN) && defined(HAVE_STRUCT_IFREQ) && HAVE_DECL_GET_VLAN_VID_CMD
int virNetDevGetVLanID(const char *ifname, int *vlanid)
{
struct vlan_ioctl_args vlanargs = {
.cmd = GET_VLAN_VID_CMD,
};
int ret = -1;
int fd = socket(PF_PACKET, SOCK_DGRAM, 0);
if (fd < 0) {
virReportSystemError(errno, "%s",
_("Unable to open control socket"));
return -1;
}
if (virStrcpyStatic(vlanargs.device1, ifname) == NULL) {
virReportSystemError(ERANGE,
_("invalid interface name %s"),
ifname);
goto cleanup;
}
if (ioctl(fd, SIOCGIFVLAN, &vlanargs) != 0) {
virReportSystemError(errno,
_("Unable to get VLAN for interface %s"), ifname);
goto cleanup;
}
*vlanid = vlanargs.u.VID;
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#else /* ! SIOCGIFVLAN */
int virNetDevGetVLanID(const char *ifname ATTRIBUTE_UNUSED,
int *vlanid ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to get VLAN on this platform"));
return -1;
}
#endif /* ! SIOCGIFVLAN */
#if defined(__linux__) && defined(HAVE_LIBNL)
static int
virNetDevGetIPAddressBinary(virSocketAddr *addr, void **data, size_t *len)
{
if (!addr)
return -1;
switch (VIR_SOCKET_ADDR_FAMILY(addr)) {
case AF_INET:
*data = &addr->data.inet4.sin_addr;
*len = sizeof(struct in_addr);
break;
case AF_INET6:
*data = &addr->data.inet6.sin6_addr;
*len = sizeof(struct in6_addr);
break;
default:
return -1;
}
return 0;
}
static struct nl_msg *
virNetDevCreateNetlinkAddressMessage(int messageType,
const char *ifname,
virSocketAddr *addr,
unsigned int prefix,
virSocketAddr *broadcast,
virSocketAddr *peer)
{
struct nl_msg *nlmsg = NULL;
struct ifaddrmsg ifa;
unsigned int ifindex;
void *addrData = NULL;
void *peerData = NULL;
void *broadcastData = NULL;
size_t addrDataLen;
if (virNetDevGetIPAddressBinary(addr, &addrData, &addrDataLen) < 0)
return NULL;
if (peer && VIR_SOCKET_ADDR_VALID(peer)) {
if (virNetDevGetIPAddressBinary(peer, &peerData, &addrDataLen) < 0)
return NULL;
} else if (broadcast) {
if (virNetDevGetIPAddressBinary(broadcast, &broadcastData,
&addrDataLen) < 0)
return NULL;
}
/* Get the interface index */
if ((ifindex = if_nametoindex(ifname)) == 0)
return NULL;
if (!(nlmsg = nlmsg_alloc_simple(messageType,
NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL))) {
virReportOOMError();
return NULL;
}
memset(&ifa, 0, sizeof(ifa));
ifa.ifa_prefixlen = prefix;
ifa.ifa_family = VIR_SOCKET_ADDR_FAMILY(addr);
ifa.ifa_index = ifindex;
ifa.ifa_scope = 0;
if (nlmsg_append(nlmsg, &ifa, sizeof(ifa), NLMSG_ALIGNTO) < 0)
goto buffer_too_small;
if (nla_put(nlmsg, IFA_LOCAL, addrDataLen, addrData) < 0)
goto buffer_too_small;
if (peerData) {
if (nla_put(nlmsg, IFA_ADDRESS, addrDataLen, peerData) < 0)
goto buffer_too_small;
}
if (broadcastData) {
if (nla_put(nlmsg, IFA_BROADCAST, addrDataLen, broadcastData) < 0)
goto buffer_too_small;
}
return nlmsg;
buffer_too_small:
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("allocated netlink buffer is too small"));
nlmsg_free(nlmsg);
return NULL;
}
/**
* virNetDevSetIPAddress:
* @ifname: the interface name
* @addr: the IP address (IPv4 or IPv6)
* @peer: The IP address of peer (IPv4 or IPv6)
* @prefix: number of 1 bits in the netmask
*
* Add an IP address to an interface. This function *does not* remove
* any previously added IP addresses - that must be done separately with
* brDelInetAddress.
*
* Returns 0 in case of success or -1 in case of error.
*/
int virNetDevSetIPAddress(const char *ifname,
virSocketAddr *addr,
virSocketAddr *peer,
unsigned int prefix)
{
virSocketAddr *broadcast = NULL;
int ret = -1;
struct nl_msg *nlmsg = NULL;
struct nlmsghdr *resp = NULL;
unsigned int recvbuflen;
/* The caller needs to provide a correct address */
if (VIR_SOCKET_ADDR_FAMILY(addr) == AF_INET && peer && !VIR_SOCKET_ADDR_VALID(peer)) {
/* compute a broadcast address if this is IPv4 */
if (VIR_ALLOC(broadcast) < 0)
return -1;
if (virSocketAddrBroadcastByPrefix(addr, prefix, broadcast) < 0)
goto cleanup;
}
if (!(nlmsg = virNetDevCreateNetlinkAddressMessage(RTM_NEWADDR, ifname,
addr, prefix,
broadcast, peer)))
goto cleanup;
if (virNetlinkCommand(nlmsg, &resp, &recvbuflen, 0, 0,
NETLINK_ROUTE, 0) < 0)
goto cleanup;
if (virNetlinkGetErrorCode(resp, recvbuflen) < 0) {
virReportError(VIR_ERR_SYSTEM_ERROR,
_("Error adding IP address to %s"), ifname);
goto cleanup;
}
ret = 0;
cleanup:
nlmsg_free(nlmsg);
VIR_FREE(resp);
VIR_FREE(broadcast);
return ret;
}
/**
* virNetDevAddRoute:
* @ifname: the interface name
* @addr: the IP network address (IPv4 or IPv6)
* @prefix: number of 1 bits in the netmask
* @gateway: via address for route (same as @addr)
*
* Add a route for a network IP address to an interface. This function
* *does not* remove any previously added IP static routes.
*
* Returns 0 in case of success or -1 in case of error.
*/
int
virNetDevAddRoute(const char *ifname,
virSocketAddrPtr addr,
unsigned int prefix,
virSocketAddrPtr gateway,
unsigned int metric)
{
int ret = -1;
struct nl_msg *nlmsg = NULL;
struct nlmsghdr *resp = NULL;
unsigned int recvbuflen;
unsigned int ifindex;
struct rtmsg rtmsg;
void *gatewayData = NULL;
void *addrData = NULL;
size_t addrDataLen;
int errCode;
virSocketAddr defaultAddr;
virSocketAddrPtr actualAddr;
char *toStr = NULL;
char *viaStr = NULL;
actualAddr = addr;
/* If we have no valid network address, then use the default one */
if (!addr || !VIR_SOCKET_ADDR_VALID(addr)) {
VIR_DEBUG("computing default address");
int family = VIR_SOCKET_ADDR_FAMILY(gateway);
if (family == AF_INET) {
if (virSocketAddrParseIPv4(&defaultAddr, VIR_SOCKET_ADDR_IPV4_ALL) < 0)
goto cleanup;
} else {
if (virSocketAddrParseIPv6(&defaultAddr, VIR_SOCKET_ADDR_IPV6_ALL) < 0)
goto cleanup;
}
actualAddr = &defaultAddr;
}
toStr = virSocketAddrFormat(actualAddr);
viaStr = virSocketAddrFormat(gateway);
VIR_DEBUG("Adding route %s/%d via %s", toStr, prefix, viaStr);
if (virNetDevGetIPAddressBinary(actualAddr, &addrData, &addrDataLen) < 0 ||
virNetDevGetIPAddressBinary(gateway, &gatewayData, &addrDataLen) < 0)
goto cleanup;
/* Get the interface index */
if ((ifindex = if_nametoindex(ifname)) == 0)
goto cleanup;
if (!(nlmsg = nlmsg_alloc_simple(RTM_NEWROUTE,
NLM_F_REQUEST | NLM_F_CREATE |
NLM_F_EXCL))) {
virReportOOMError();
goto cleanup;
}
memset(&rtmsg, 0, sizeof(rtmsg));
rtmsg.rtm_family = VIR_SOCKET_ADDR_FAMILY(gateway);
rtmsg.rtm_table = RT_TABLE_MAIN;
rtmsg.rtm_scope = RT_SCOPE_UNIVERSE;
rtmsg.rtm_protocol = RTPROT_BOOT;
rtmsg.rtm_type = RTN_UNICAST;
rtmsg.rtm_dst_len = prefix;
if (nlmsg_append(nlmsg, &rtmsg, sizeof(rtmsg), NLMSG_ALIGNTO) < 0)
goto buffer_too_small;
if (prefix > 0 && nla_put(nlmsg, RTA_DST, addrDataLen, addrData) < 0)
goto buffer_too_small;
if (nla_put(nlmsg, RTA_GATEWAY, addrDataLen, gatewayData) < 0)
goto buffer_too_small;
if (nla_put_u32(nlmsg, RTA_OIF, ifindex) < 0)
goto buffer_too_small;
if (metric > 0 && nla_put_u32(nlmsg, RTA_PRIORITY, metric) < 0)
goto buffer_too_small;
if (virNetlinkCommand(nlmsg, &resp, &recvbuflen, 0, 0,
NETLINK_ROUTE, 0) < 0)
goto cleanup;
if ((errCode = virNetlinkGetErrorCode(resp, recvbuflen)) < 0) {
virReportSystemError(errCode, _("Error adding route to %s"), ifname);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FREE(toStr);
VIR_FREE(viaStr);
nlmsg_free(nlmsg);
return ret;
buffer_too_small:
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("allocated netlink buffer is too small"));
goto cleanup;
}
/**
* virNetDevClearIPAddress:
* @ifname: the interface name
* @addr: the IP address (IPv4 or IPv6)
* @prefix: number of 1 bits in the netmask
*
* Delete an IP address from an interface.
*
* Returns 0 in case of success or -1 in case of error.
*/
int virNetDevClearIPAddress(const char *ifname,
virSocketAddr *addr,
unsigned int prefix)
{
int ret = -1;
struct nl_msg *nlmsg = NULL;
struct nlmsghdr *resp = NULL;
unsigned int recvbuflen;
if (!(nlmsg = virNetDevCreateNetlinkAddressMessage(RTM_DELADDR, ifname,
addr, prefix,
NULL, NULL)))
goto cleanup;
if (virNetlinkCommand(nlmsg, &resp, &recvbuflen, 0, 0,
NETLINK_ROUTE, 0) < 0)
goto cleanup;
if (virNetlinkGetErrorCode(resp, recvbuflen) < 0) {
virReportError(VIR_ERR_SYSTEM_ERROR,
_("Error removing IP address from %s"), ifname);
goto cleanup;
}
ret = 0;
cleanup:
nlmsg_free(nlmsg);
VIR_FREE(resp);
return ret;
}
/* return true if there is a known address with 'tentative' flag set */
static bool
virNetDevParseDadStatus(struct nlmsghdr *nlh, int len,
virSocketAddrPtr *addrs, size_t count)
{
struct ifaddrmsg *ifaddrmsg_ptr;
unsigned int ifaddrmsg_len;
struct rtattr *rtattr_ptr;
size_t i;
struct in6_addr *addr;
VIR_WARNINGS_NO_CAST_ALIGN
for (; NLMSG_OK(nlh, len); nlh = NLMSG_NEXT(nlh, len)) {
VIR_WARNINGS_RESET
if (NLMSG_PAYLOAD(nlh, 0) < sizeof(struct ifaddrmsg)) {
/* Message without payload is the last one. */
break;
}
ifaddrmsg_ptr = (struct ifaddrmsg *)NLMSG_DATA(nlh);
if (!(ifaddrmsg_ptr->ifa_flags & IFA_F_TENTATIVE)) {
/* Not tentative: we are not interested in this entry. */
continue;
}
ifaddrmsg_len = IFA_PAYLOAD(nlh);
VIR_WARNINGS_NO_CAST_ALIGN
rtattr_ptr = (struct rtattr *) IFA_RTA(ifaddrmsg_ptr);
for (; RTA_OK(rtattr_ptr, ifaddrmsg_len);
rtattr_ptr = RTA_NEXT(rtattr_ptr, ifaddrmsg_len)) {
VIR_WARNINGS_RESET
if (RTA_PAYLOAD(rtattr_ptr) != sizeof(struct in6_addr)) {
/* No address: ignore. */
continue;
}
/* We check only known addresses. */
for (i = 0; i < count; i++) {
addr = &addrs[i]->data.inet6.sin6_addr;
if (!memcmp(addr, RTA_DATA(rtattr_ptr),
sizeof(struct in6_addr))) {
/* We found matching tentative address. */
return true;
}
}
}
}
return false;
}
/* return after DAD finishes for all known IPv6 addresses or an error */
int
virNetDevWaitDadFinish(virSocketAddrPtr *addrs, size_t count)
{
struct nl_msg *nlmsg = NULL;
struct ifaddrmsg ifa;
struct nlmsghdr *resp = NULL;
unsigned int recvbuflen;
int ret = -1;
bool dad = true;
time_t max_time = time(NULL) + VIR_DAD_WAIT_TIMEOUT;
if (!(nlmsg = nlmsg_alloc_simple(RTM_GETADDR,
NLM_F_REQUEST | NLM_F_DUMP))) {
virReportOOMError();
return -1;
}
memset(&ifa, 0, sizeof(ifa));
/* DAD is for IPv6 adresses only. */
ifa.ifa_family = AF_INET6;
if (nlmsg_append(nlmsg, &ifa, sizeof(ifa), NLMSG_ALIGNTO) < 0) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("allocated netlink buffer is too small"));
goto cleanup;
}
/* Periodically query netlink until DAD finishes on all known addresses. */
while (dad && time(NULL) < max_time) {
if (virNetlinkCommand(nlmsg, &resp, &recvbuflen, 0, 0,
NETLINK_ROUTE, 0) < 0)
goto cleanup;
if (virNetlinkGetErrorCode(resp, recvbuflen) < 0) {
virReportError(VIR_ERR_SYSTEM_ERROR, "%s",
_("error reading DAD state information"));
goto cleanup;
}
/* Parse response. */
dad = virNetDevParseDadStatus(resp, recvbuflen, addrs, count);
if (dad)
usleep(1000 * 10);
VIR_FREE(resp);
}
/* Check timeout. */
if (dad) {
virReportError(VIR_ERR_SYSTEM_ERROR,
_("Duplicate Address Detection "
"not finished in %d seconds"), VIR_DAD_WAIT_TIMEOUT);
} else {
ret = 0;
}
cleanup:
VIR_FREE(resp);
nlmsg_free(nlmsg);
return ret;
}
#else /* defined(__linux__) && defined(HAVE_LIBNL) */
int virNetDevSetIPAddress(const char *ifname,
virSocketAddr *addr,
virSocketAddr *peer,
unsigned int prefix)
{
virCommandPtr cmd = NULL;
char *addrstr = NULL, *bcaststr = NULL, *peerstr = NULL;
virSocketAddr broadcast;
int ret = -1;
if (!(addrstr = virSocketAddrFormat(addr)))
goto cleanup;
if (peer && VIR_SOCKET_ADDR_VALID(peer) && !(peerstr = virSocketAddrFormat(peer)))
goto cleanup;
/* format up a broadcast address if this is IPv4 */
if (!peerstr && ((VIR_SOCKET_ADDR_IS_FAMILY(addr, AF_INET)) &&
((virSocketAddrBroadcastByPrefix(addr, prefix, &broadcast) < 0) ||
!(bcaststr = virSocketAddrFormat(&broadcast))))) {
goto cleanup;
}
# ifdef IFCONFIG_PATH
cmd = virCommandNew(IFCONFIG_PATH);
virCommandAddArg(cmd, ifname);
if (VIR_SOCKET_ADDR_IS_FAMILY(addr, AF_INET6))
virCommandAddArg(cmd, "inet6");
else
virCommandAddArg(cmd, "inet");
virCommandAddArgFormat(cmd, "%s/%u", addrstr, prefix);
if (peerstr)
virCommandAddArgList(cmd, "pointopoint", peerstr, NULL);
if (bcaststr)
virCommandAddArgList(cmd, "broadcast", bcaststr, NULL);
virCommandAddArg(cmd, "alias");
# else
cmd = virCommandNew(IP_PATH);
virCommandAddArgList(cmd, "addr", "add", NULL);
virCommandAddArgFormat(cmd, "%s/%u", addrstr, prefix);
if (peerstr)
virCommandAddArgList(cmd, "peer", peerstr, NULL);
if (bcaststr)
virCommandAddArgList(cmd, "broadcast", bcaststr, NULL);
virCommandAddArgList(cmd, "dev", ifname, NULL);
# endif
if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FREE(addrstr);
VIR_FREE(bcaststr);
VIR_FREE(peerstr);
virCommandFree(cmd);
return ret;
}
int
virNetDevAddRoute(const char *ifname,
virSocketAddrPtr addr,
unsigned int prefix,
virSocketAddrPtr gateway,
unsigned int metric)
{
virCommandPtr cmd = NULL;
char *addrstr = NULL, *gatewaystr = NULL;
int ret = -1;
if (!(addrstr = virSocketAddrFormat(addr)))
goto cleanup;
if (!(gatewaystr = virSocketAddrFormat(gateway)))
goto cleanup;
cmd = virCommandNew(IP_PATH);
virCommandAddArgList(cmd, "route", "add", NULL);
virCommandAddArgFormat(cmd, "%s/%u", addrstr, prefix);
virCommandAddArgList(cmd, "via", gatewaystr, "dev", ifname,
"proto", "static", "metric", NULL);
virCommandAddArgFormat(cmd, "%u", metric);
if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FREE(addrstr);
VIR_FREE(gatewaystr);
virCommandFree(cmd);
return ret;
}
int virNetDevClearIPAddress(const char *ifname,
virSocketAddr *addr,
unsigned int prefix)
{
virCommandPtr cmd = NULL;
char *addrstr;
int ret = -1;
if (!(addrstr = virSocketAddrFormat(addr)))
goto cleanup;
# ifdef IFCONFIG_PATH
cmd = virCommandNew(IFCONFIG_PATH);
virCommandAddArg(cmd, ifname);
if (VIR_SOCKET_ADDR_IS_FAMILY(addr, AF_INET6))
virCommandAddArg(cmd, "inet6");
else
virCommandAddArg(cmd, "inet");
virCommandAddArgFormat(cmd, "%s/%u", addrstr, prefix);
virCommandAddArg(cmd, "-alias");
# else
cmd = virCommandNew(IP_PATH);
virCommandAddArgList(cmd, "addr", "del", NULL);
virCommandAddArgFormat(cmd, "%s/%u", addrstr, prefix);
virCommandAddArgList(cmd, "dev", ifname, NULL);
# endif
if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FREE(addrstr);
virCommandFree(cmd);
return ret;
}
/* return after DAD finishes for all known IPv6 addresses or an error */
int
virNetDevWaitDadFinish(virSocketAddrPtr *addrs ATTRIBUTE_UNUSED,
size_t count ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to wait for IPv6 DAD on this platform"));
return -1;
}
#endif /* defined(__linux__) && defined(HAVE_LIBNL) */
/**
* virNetDevGetIPv4AddressIoctl:
* @ifname: name of the interface whose IP address we want
* @addr: filled with the IPv4 address
*
* This function gets the IPv4 address for the interface @ifname
* and stores it in @addr
*
* Returns 0 on success, -errno on failure.
*/
#if defined(SIOCGIFADDR) && defined(HAVE_STRUCT_IFREQ)
static int
virNetDevGetIPv4AddressIoctl(const char *ifname,
virSocketAddrPtr addr)
{
int fd = -1;
int ret = -1;
struct ifreq ifr;
if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
return -1;
if (ioctl(fd, SIOCGIFADDR, (char *)&ifr) < 0) {
virReportSystemError(errno,
_("Unable to get IPv4 address for interface %s via ioctl"),
ifname);
goto cleanup;
}
addr->data.stor.ss_family = AF_INET;
addr->len = sizeof(addr->data.inet4);
memcpy(&addr->data.inet4, &ifr.ifr_addr, addr->len);
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#else /* ! SIOCGIFADDR */
static int
virNetDevGetIPv4AddressIoctl(const char *ifname ATTRIBUTE_UNUSED,
virSocketAddrPtr addr ATTRIBUTE_UNUSED)
{
return -2;
}
#endif /* ! SIOCGIFADDR */
/**
* virNetDevGetifaddrsAddress:
* @ifname: name of the interface whose IP address we want
* @addr: filled with the IP address
*
* This function gets the IP address for the interface @ifname
* and stores it in @addr
*
* Returns 0 on success, -1 on failure, -2 on unsupported.
*/
#if HAVE_GETIFADDRS
static int
virNetDevGetifaddrsAddress(const char *ifname,
virSocketAddrPtr addr)
{
struct ifaddrs *ifap, *ifa;
int ret = -1;
if (getifaddrs(&ifap) < 0) {
virReportSystemError(errno,
_("Could not get interface list for '%s'"),
ifname);
return -1;
}
for (ifa = ifap; ifa; ifa = ifa->ifa_next) {
int family = ifa->ifa_addr->sa_family;
if (STRNEQ_NULLABLE(ifa->ifa_name, ifname))
continue;
if (family != AF_INET6 && family != AF_INET)
continue;
if (family == AF_INET6) {
addr->len = sizeof(addr->data.inet6);
memcpy(&addr->data.inet6, ifa->ifa_addr, addr->len);
} else {
addr->len = sizeof(addr->data.inet4);
memcpy(&addr->data.inet4, ifa->ifa_addr, addr->len);
}
addr->data.stor.ss_family = family;
ret = 0;
goto cleanup;
}
virReportError(VIR_ERR_INTERNAL_ERROR,
_("no IP address found for interface '%s'"),
ifname);
cleanup:
freeifaddrs(ifap);
return ret;
}
#else /* ! HAVE_GETIFADDRS */
static int
virNetDevGetifaddrsAddress(const char *ifname ATTRIBUTE_UNUSED,
virSocketAddrPtr addr ATTRIBUTE_UNUSED)
{
return -2;
}
#endif
/**
* virNetDevGetIPAddress:
* @ifname: name of the interface whose IP address we want
* @addr: filled with the IPv4 address
*
* This function gets the IPv4 address for the interface @ifname
* and stores it in @addr
*
* Returns 0 on success, -errno on failure.
*/
int
virNetDevGetIPAddress(const char *ifname,
virSocketAddrPtr addr)
{
int ret;
memset(addr, 0, sizeof(*addr));
addr->data.stor.ss_family = AF_UNSPEC;
if ((ret = virNetDevGetifaddrsAddress(ifname, addr)) != -2)
return ret;
if ((ret = virNetDevGetIPv4AddressIoctl(ifname, addr)) != -2)
return ret;
virReportSystemError(ENOSYS, "%s",
_("Unable to get IP address on this platform"));
return -1;
}
/**
* virNetDevValidateConfig:
* @ifname: Name of the interface
* @macaddr: expected MAC address of the interface; not checked if NULL
* @ifindex: expected index of the interface; not checked if '-1'
*
* Determine whether a given interface is still available. If so,
* it must have the given MAC address and if an interface index is
* passed, it must also match the interface index.
*
* Returns 1 if the config matches, 0 if the config does not match, or interface does not exist, -1 on error
*/
#if defined(SIOCGIFHWADDR) && defined(HAVE_STRUCT_IFREQ)
int virNetDevValidateConfig(const char *ifname,
const virMacAddr *macaddr, int ifindex)
{
int fd = -1;
int ret = -1;
struct ifreq ifr;
int idx;
int rc;
if ((rc = virNetDevExists(ifname)) < 0)
return -1;
if (rc == 0) {
ret = 0;
goto cleanup;
}
if (macaddr != NULL) {
if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
return -1;
if (ioctl(fd, SIOCGIFHWADDR, &ifr) < 0) {
if (errno == ENODEV) {
ret = 0;
goto cleanup;
}
virReportSystemError(errno,
_("could not get MAC address of interface %s"),
ifname);
goto cleanup;
}
if (virMacAddrCmpRaw(macaddr,
(unsigned char *)ifr.ifr_hwaddr.sa_data) != 0) {
ret = 0;
goto cleanup;
}
}
if (ifindex != -1) {
if (virNetDevGetIndex(ifname, &idx) < 0)
goto cleanup;
if (idx != ifindex) {
ret = 0;
goto cleanup;
}
}
ret = 1;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#else
int virNetDevValidateConfig(const char *ifname ATTRIBUTE_UNUSED,
const virMacAddr *macaddr ATTRIBUTE_UNUSED,
int ifindex ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to check interface config on this platform"));
return -1;
}
#endif
#ifdef __linux__
int
virNetDevSysfsFile(char **pf_sysfs_device_link, const char *ifname,
const char *file)
{
if (virAsprintf(pf_sysfs_device_link, SYSFS_NET_DIR "%s/%s", ifname, file) < 0)
return -1;
return 0;
}
static int
virNetDevSysfsDeviceFile(char **pf_sysfs_device_link, const char *ifname,
const char *file)
{
if (virAsprintf(pf_sysfs_device_link, SYSFS_NET_DIR "%s/device/%s", ifname,
file) < 0)
return -1;
return 0;
}
/**
* virNetDevGetVirtualFunctions:
*
* @pfname : name of the physical function interface name
* @vfname: array that will hold the interface names of the virtual_functions
* @n_vfname: pointer to the number of virtual functions
*
* Returns 0 on success and -1 on failure
*/
int
virNetDevGetVirtualFunctions(const char *pfname,
char ***vfname,
virPCIDeviceAddressPtr **virt_fns,
size_t *n_vfname,
unsigned int *max_vfs)
{
int ret = -1;
size_t i;
char *pf_sysfs_device_link = NULL;
char *pci_sysfs_device_link = NULL;
char *pciConfigAddr = NULL;
*virt_fns = NULL;
*n_vfname = 0;
*max_vfs = 0;
if (virNetDevSysfsFile(&pf_sysfs_device_link, pfname, "device") < 0)
return ret;
if (virPCIGetVirtualFunctions(pf_sysfs_device_link, virt_fns,
n_vfname, max_vfs) < 0)
goto cleanup;
if (VIR_ALLOC_N(*vfname, *n_vfname) < 0)
goto cleanup;
for (i = 0; i < *n_vfname; i++) {
if (virPCIGetAddrString((*virt_fns)[i]->domain,
(*virt_fns)[i]->bus,
(*virt_fns)[i]->slot,
(*virt_fns)[i]->function,
&pciConfigAddr) < 0) {
virReportSystemError(ENOSYS, "%s",
_("Failed to get PCI Config Address String"));
goto cleanup;
}
if (virPCIGetSysfsFile(pciConfigAddr, &pci_sysfs_device_link) < 0) {
virReportSystemError(ENOSYS, "%s",
_("Failed to get PCI SYSFS file"));
goto cleanup;
}
if (virPCIGetNetName(pci_sysfs_device_link, &((*vfname)[i])) < 0)
VIR_INFO("VF does not have an interface name");
}
ret = 0;
cleanup:
if (ret < 0) {
VIR_FREE(*vfname);
VIR_FREE(*virt_fns);
}
VIR_FREE(pf_sysfs_device_link);
VIR_FREE(pci_sysfs_device_link);
VIR_FREE(pciConfigAddr);
return ret;
}
/**
* virNetDevIsVirtualFunction:
* @ifname : name of the interface
*
* Checks if an interface is a SRIOV virtual function.
*
* Returns 1 if interface is SRIOV virtual function, 0 if not and -1 if error
*
*/
int
virNetDevIsVirtualFunction(const char *ifname)
{
char *if_sysfs_device_link = NULL;
int ret = -1;
if (virNetDevSysfsFile(&if_sysfs_device_link, ifname, "device") < 0)
return ret;
ret = virPCIIsVirtualFunction(if_sysfs_device_link);
VIR_FREE(if_sysfs_device_link);
return ret;
}
/**
* virNetDevGetVirtualFunctionIndex
*
* @pfname : name of the physical function interface name
* @vfname : name of the virtual function interface name
* @vf_index : Pointer to int. Contains vf index of interface upon successful
* return
*
* Returns 0 on success, -1 on failure
*
*/
int
virNetDevGetVirtualFunctionIndex(const char *pfname, const char *vfname,
int *vf_index)
{
char *pf_sysfs_device_link = NULL, *vf_sysfs_device_link = NULL;
int ret = -1;
if (virNetDevSysfsFile(&pf_sysfs_device_link, pfname, "device") < 0)
return ret;
if (virNetDevSysfsFile(&vf_sysfs_device_link, vfname, "device") < 0) {
VIR_FREE(pf_sysfs_device_link);
return ret;
}
ret = virPCIGetVirtualFunctionIndex(pf_sysfs_device_link,
vf_sysfs_device_link,
vf_index);
VIR_FREE(pf_sysfs_device_link);
VIR_FREE(vf_sysfs_device_link);
return ret;
}
/**
* virNetDevGetPhysicalFunction
*
* @ifname : name of the physical function interface name
* @pfname : Contains sriov physical function for interface ifname
* upon successful return
*
* Returns 0 on success, -1 on failure
*
*/
int
virNetDevGetPhysicalFunction(const char *ifname, char **pfname)
{
char *physfn_sysfs_path = NULL;
int ret = -1;
if (virNetDevSysfsDeviceFile(&physfn_sysfs_path, ifname, "physfn") < 0)
return ret;
ret = virPCIGetNetName(physfn_sysfs_path, pfname);
VIR_FREE(physfn_sysfs_path);
return ret;
}
/**
* virNetDevGetVirtualFunctionInfo:
* @vfname: name of the virtual function interface
* @pfname: name of the physical function
* @vf: vf index
*
* Returns 0 on success, -errno on failure.
*
*/
int
virNetDevGetVirtualFunctionInfo(const char *vfname, char **pfname,
int *vf)
{
char *pf_sysfs_path = NULL, *vf_sysfs_path = NULL;
int ret = -1;
*pfname = NULL;
if (virNetDevGetPhysicalFunction(vfname, pfname) < 0)
return ret;
if (virNetDevSysfsFile(&pf_sysfs_path, *pfname, "device") < 0)
goto cleanup;
if (virNetDevSysfsFile(&vf_sysfs_path, vfname, "device") < 0)
goto cleanup;
ret = virPCIGetVirtualFunctionIndex(pf_sysfs_path, vf_sysfs_path, vf);
cleanup:
if (ret < 0)
VIR_FREE(*pfname);
VIR_FREE(vf_sysfs_path);
VIR_FREE(pf_sysfs_path);
return ret;
}
#else /* !__linux__ */
int
virNetDevGetVirtualFunctions(const char *pfname ATTRIBUTE_UNUSED,
char ***vfname ATTRIBUTE_UNUSED,
virPCIDeviceAddressPtr **virt_fns ATTRIBUTE_UNUSED,
size_t *n_vfname ATTRIBUTE_UNUSED,
unsigned int *max_vfs ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to get virtual functions on this platform"));
return -1;
}
int
virNetDevIsVirtualFunction(const char *ifname ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to check virtual function status on this platform"));
return -1;
}
int
virNetDevGetVirtualFunctionIndex(const char *pfname ATTRIBUTE_UNUSED,
const char *vfname ATTRIBUTE_UNUSED,
int *vf_index ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to get virtual function index on this platform"));
return -1;
}
int
virNetDevGetPhysicalFunction(const char *ifname ATTRIBUTE_UNUSED,
char **pfname ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to get physical function status on this platform"));
return -1;
}
int
virNetDevGetVirtualFunctionInfo(const char *vfname ATTRIBUTE_UNUSED,
char **pfname ATTRIBUTE_UNUSED,
int *vf ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to get virtual function info on this platform"));
return -1;
}
int
virNetDevSysfsFile(char **pf_sysfs_device_link ATTRIBUTE_UNUSED,
const char *ifname ATTRIBUTE_UNUSED,
const char *file ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to get sysfs info on this platform"));
return -1;
}
#endif /* !__linux__ */
#if defined(__linux__) && defined(HAVE_LIBNL) && defined(IFLA_VF_MAX)
static struct nla_policy ifla_vf_policy[IFLA_VF_MAX+1] = {
[IFLA_VF_MAC] = { .type = NLA_UNSPEC,
.maxlen = sizeof(struct ifla_vf_mac) },
[IFLA_VF_VLAN] = { .type = NLA_UNSPEC,
.maxlen = sizeof(struct ifla_vf_vlan) },
};
/**
* virNetDevLinkDump:
*
* @ifname: The name of the interface; only use if ifindex <= 0
* @ifindex: The interface index; may be <= 0 if ifname is given
* @data: Gets a pointer to the raw data from netlink.
MUST BE FREED BY CALLER!
* @nlattr: Pointer to a pointer of netlink attributes that will contain
* the results
* @src_pid: pid used for nl_pid of the local end of the netlink message
* (0 == "use getpid()")
* @dst_pid: pid of destination nl_pid if the kernel
* is not the target of the netlink message but it is to be
* sent to another process (0 if sending to the kernel)
*
* Get information from netlink about an interface given its name or index.
*
* Returns 0 on success, -1 on fatal error.
*/
int
virNetDevLinkDump(const char *ifname, int ifindex,
void **nlData, struct nlattr **tb,
uint32_t src_pid, uint32_t dst_pid)
{
int rc = -1;
struct nlmsghdr *resp = NULL;
struct nlmsgerr *err;
struct ifinfomsg ifinfo = {
.ifi_family = AF_UNSPEC,
.ifi_index = ifindex
};
unsigned int recvbuflen;
struct nl_msg *nl_msg;
if (ifname && ifindex <= 0 && virNetDevGetIndex(ifname, &ifindex) < 0)
return -1;
ifinfo.ifi_index = ifindex;
nl_msg = nlmsg_alloc_simple(RTM_GETLINK, NLM_F_REQUEST);
if (!nl_msg) {
virReportOOMError();
return -1;
}
if (nlmsg_append(nl_msg, &ifinfo, sizeof(ifinfo), NLMSG_ALIGNTO) < 0)
goto buffer_too_small;
if (ifname) {
if (nla_put(nl_msg, IFLA_IFNAME, strlen(ifname)+1, ifname) < 0)
goto buffer_too_small;
}
# ifdef RTEXT_FILTER_VF
/* if this filter exists in the kernel's netlink implementation,
* we need to set it, otherwise the response message will not
* contain the IFLA_VFINFO_LIST that we're looking for.
*/
{
uint32_t ifla_ext_mask = RTEXT_FILTER_VF;
if (nla_put(nl_msg, IFLA_EXT_MASK,
sizeof(ifla_ext_mask), &ifla_ext_mask) < 0) {
goto buffer_too_small;
}
}
# endif
if (virNetlinkCommand(nl_msg, &resp, &recvbuflen,
src_pid, dst_pid, NETLINK_ROUTE, 0) < 0)
goto cleanup;
if (recvbuflen < NLMSG_LENGTH(0) || resp == NULL)
goto malformed_resp;
switch (resp->nlmsg_type) {
case NLMSG_ERROR:
err = (struct nlmsgerr *)NLMSG_DATA(resp);
if (resp->nlmsg_len < NLMSG_LENGTH(sizeof(*err)))
goto malformed_resp;
if (err->error) {
virReportSystemError(-err->error,
_("error dumping %s (%d) interface"),
ifname, ifindex);
goto cleanup;
}
break;
case GENL_ID_CTRL:
case NLMSG_DONE:
rc = nlmsg_parse(resp, sizeof(struct ifinfomsg),
tb, IFLA_MAX, NULL);
if (rc < 0)
goto malformed_resp;
break;
default:
goto malformed_resp;
}
rc = 0;
cleanup:
nlmsg_free(nl_msg);
if (rc < 0)
VIR_FREE(resp);
*nlData = resp;
return rc;
malformed_resp:
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("malformed netlink response message"));
goto cleanup;
buffer_too_small:
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("allocated netlink buffer is too small"));
goto cleanup;
}
static int
virNetDevSetVfConfig(const char *ifname, int ifindex, int vf,
bool nltarget_kernel, const virMacAddr *macaddr,
int vlanid, uint32_t (*getPidFunc)(void))
{
int rc = -1;
struct nlmsghdr *resp = NULL;
struct nlmsgerr *err;
unsigned int recvbuflen = 0;
uint32_t pid = 0;
struct nl_msg *nl_msg;
struct nlattr *vfinfolist, *vfinfo;
struct ifinfomsg ifinfo = {
.ifi_family = AF_UNSPEC,
.ifi_index = ifindex
};
if (!macaddr && vlanid < 0)
return -1;
nl_msg = nlmsg_alloc_simple(RTM_SETLINK, NLM_F_REQUEST);
if (!nl_msg) {
virReportOOMError();
return rc;
}
if (nlmsg_append(nl_msg, &ifinfo, sizeof(ifinfo), NLMSG_ALIGNTO) < 0)
goto buffer_too_small;
if (ifname &&
nla_put(nl_msg, IFLA_IFNAME, strlen(ifname)+1, ifname) < 0)
goto buffer_too_small;
if (!(vfinfolist = nla_nest_start(nl_msg, IFLA_VFINFO_LIST)))
goto buffer_too_small;
if (!(vfinfo = nla_nest_start(nl_msg, IFLA_VF_INFO)))
goto buffer_too_small;
if (macaddr) {
struct ifla_vf_mac ifla_vf_mac = {
.vf = vf,
.mac = { 0, },
};
virMacAddrGetRaw(macaddr, ifla_vf_mac.mac);
if (nla_put(nl_msg, IFLA_VF_MAC, sizeof(ifla_vf_mac),
&ifla_vf_mac) < 0)
goto buffer_too_small;
}
if (vlanid >= 0) {
struct ifla_vf_vlan ifla_vf_vlan = {
.vf = vf,
.vlan = vlanid,
.qos = 0,
};
if (nla_put(nl_msg, IFLA_VF_VLAN, sizeof(ifla_vf_vlan),
&ifla_vf_vlan) < 0)
goto buffer_too_small;
}
nla_nest_end(nl_msg, vfinfo);
nla_nest_end(nl_msg, vfinfolist);
if (!nltarget_kernel) {
pid = getPidFunc();
if (pid == 0) {
rc = -1;
goto cleanup;
}
}
if (virNetlinkCommand(nl_msg, &resp, &recvbuflen, 0, pid,
NETLINK_ROUTE, 0) < 0)
goto cleanup;
if (recvbuflen < NLMSG_LENGTH(0) || resp == NULL)
goto malformed_resp;
switch (resp->nlmsg_type) {
case NLMSG_ERROR:
err = (struct nlmsgerr *)NLMSG_DATA(resp);
if (resp->nlmsg_len < NLMSG_LENGTH(sizeof(*err)))
goto malformed_resp;
if (err->error) {
char macstr[VIR_MAC_STRING_BUFLEN];
virReportSystemError(-err->error,
_("Cannot set interface MAC/vlanid to %s/%d "
"for ifname %s ifindex %d vf %d"),
(macaddr
? virMacAddrFormat(macaddr, macstr)
: "(unchanged)"),
vlanid,
ifname ? ifname : "(unspecified)",
ifindex, vf);
goto cleanup;
}
break;
case NLMSG_DONE:
break;
default:
goto malformed_resp;
}
rc = 0;
cleanup:
nlmsg_free(nl_msg);
VIR_FREE(resp);
return rc;
malformed_resp:
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("malformed netlink response message"));
goto cleanup;
buffer_too_small:
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("allocated netlink buffer is too small"));
goto cleanup;
}
static int
virNetDevParseVfConfig(struct nlattr **tb, int32_t vf, virMacAddrPtr mac,
int *vlanid)
{
int rc = -1;
struct ifla_vf_mac *vf_mac;
struct ifla_vf_vlan *vf_vlan;
struct nlattr *tb_vf_info = {NULL, };
struct nlattr *tb_vf[IFLA_VF_MAX+1];
int rem;
if (!tb[IFLA_VFINFO_LIST]) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("missing IFLA_VF_INFO in netlink response"));
goto cleanup;
}
nla_for_each_nested(tb_vf_info, tb[IFLA_VFINFO_LIST], rem) {
if (nla_type(tb_vf_info) != IFLA_VF_INFO)
continue;
if (nla_parse_nested(tb_vf, IFLA_VF_MAX, tb_vf_info,
ifla_vf_policy)) {
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("error parsing IFLA_VF_INFO"));
goto cleanup;
}
if (tb[IFLA_VF_MAC]) {
vf_mac = RTA_DATA(tb_vf[IFLA_VF_MAC]);
if (vf_mac && vf_mac->vf == vf) {
virMacAddrSetRaw(mac, vf_mac->mac);
rc = 0;
}
}
if (tb[IFLA_VF_VLAN]) {
vf_vlan = RTA_DATA(tb_vf[IFLA_VF_VLAN]);
if (vf_vlan && vf_vlan->vf == vf) {
*vlanid = vf_vlan->vlan;
rc = 0;
}
}
if (rc == 0)
break;
}
if (rc < 0)
virReportError(VIR_ERR_INTERNAL_ERROR,
_("couldn't find IFLA_VF_INFO for VF %d "
"in netlink response"), vf);
cleanup:
return rc;
}
static int
virNetDevGetVfConfig(const char *ifname, int vf, virMacAddrPtr mac,
int *vlanid)
{
int rc = -1;
void *nlData = NULL;
struct nlattr *tb[IFLA_MAX + 1] = {NULL, };
int ifindex = -1;
rc = virNetDevLinkDump(ifname, ifindex, &nlData, tb, 0, 0);
if (rc < 0)
goto cleanup;
rc = virNetDevParseVfConfig(tb, vf, mac, vlanid);
cleanup:
VIR_FREE(nlData);
return rc;
}
static int
virNetDevReplaceVfConfig(const char *pflinkdev, int vf,
const virMacAddr *macaddress,
int vlanid,
const char *stateDir)
{
int ret = -1;
virMacAddr oldmac;
int oldvlanid = -1;
char *path = NULL;
char macstr[VIR_MAC_STRING_BUFLEN];
char *fileData = NULL;
int ifindex = -1;
bool pfIsOnline;
/* Assure that PF is online prior to twiddling with the VF. It
* *should* be, but if the PF isn't online the changes made to the
* VF via the PF won't take effect, yet there will be no error
* reported. In the case that it isn't online, fail and report the
* error, since setting an unconfigured interface online
* automatically turns on IPv6 autoconfig, which may not be what
* the admin expects, so we want them to explicitly enable the PF
* in the host system network config.
*/
if (virNetDevGetOnline(pflinkdev, &pfIsOnline) < 0)
goto cleanup;
if (!pfIsOnline) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unable to configure VF %d of PF '%s' "
"because the PF is not online. Please "
"change host network config to put the "
"PF online."),
vf, pflinkdev);
goto cleanup;
}
if (virNetDevGetVfConfig(pflinkdev, vf, &oldmac, &oldvlanid) < 0)
goto cleanup;
if (virAsprintf(&path, "%s/%s_vf%d",
stateDir, pflinkdev, vf) < 0)
goto cleanup;
if (virAsprintf(&fileData, "%s\n%d\n",
virMacAddrFormat(&oldmac, macstr), oldvlanid) < 0)
goto cleanup;
if (virFileWriteStr(path, fileData, O_CREAT|O_TRUNC|O_WRONLY) < 0) {
virReportSystemError(errno, _("Unable to preserve mac/vlan tag "
"for pf = %s, vf = %d"), pflinkdev, vf);
goto cleanup;
}
ret = virNetDevSetVfConfig(pflinkdev, ifindex, vf, true,
macaddress, vlanid, NULL);
cleanup:
VIR_FREE(path);
VIR_FREE(fileData);
return ret;
}
static int
virNetDevRestoreVfConfig(const char *pflinkdev,
int vf, const char *vflinkdev,
const char *stateDir)
{
int rc = -1;
char *path = NULL;
char *fileData = NULL;
char *vlan = NULL;
virMacAddr oldmac;
int vlanid = -1;
int ifindex = -1;
if (virAsprintf(&path, "%s/%s_vf%d",
stateDir, pflinkdev, vf) < 0)
return rc;
if (vflinkdev && !virFileExists(path)) {
/* this VF's config may have been stored with
* virNetDevReplaceMacAddress while running an older version
* of libvirt. If so, the ${pf}_vf${id} file won't exist. In
* that case, try to restore using the older method with the
* VF's name directly.
*/
rc = virNetDevRestoreMacAddress(vflinkdev, stateDir);
goto cleanup;
}
if (virFileReadAll(path, 128, &fileData) < 0)
goto cleanup;
if ((vlan = strchr(fileData, '\n'))) {
char *endptr;
*vlan++ = 0; /* NULL terminate the mac address */
if (*vlan) {
if ((virStrToLong_i(vlan, &endptr, 10, &vlanid) < 0) ||
(endptr && *endptr != '\n' && *endptr != 0)) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Cannot parse vlan tag from '%s'"),
vlan);
goto cleanup;
}
}
}
if (virMacAddrParse(fileData, &oldmac) != 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Cannot parse MAC address from '%s'"),
fileData);
goto cleanup;
}
/*reset mac and remove file-ignore results*/
rc = virNetDevSetVfConfig(pflinkdev, ifindex, vf, true,
&oldmac, vlanid, NULL);
ignore_value(unlink(path));
cleanup:
VIR_FREE(path);
VIR_FREE(fileData);
return rc;
}
/**
* virNetDevReplaceNetConfig:
* @linkdev: name of the interface
* @vf: vf index if linkdev is a pf
* @macaddress: new MAC address for interface
* @vlanid: new vlanid
* @stateDir: directory to store old net config
*
* Returns 0 on success, -1 on failure
*
*/
int
virNetDevReplaceNetConfig(const char *linkdev, int vf,
const virMacAddr *macaddress,
virNetDevVlanPtr vlan,
const char *stateDir)
{
int ret = -1;
char *pfdevname = NULL;
if (vf == -1 && virNetDevIsVirtualFunction(linkdev) == 1) {
/* If this really *is* a VF and the caller just didn't know
* it, we should set the MAC address via PF+vf# instead of
* setting directly via VF, because the latter will be
* rejected any time after the former has been done.
*/
if (virNetDevGetPhysicalFunction(linkdev, &pfdevname) < 0)
goto cleanup;
if (virNetDevGetVirtualFunctionIndex(pfdevname, linkdev, &vf) < 0)
goto cleanup;
linkdev = pfdevname;
}
if (vf == -1) {
if (vlan) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("vlan can only be set for SR-IOV VFs, but "
"%s is not a VF"), linkdev);
goto cleanup;
}
ret = virNetDevReplaceMacAddress(linkdev, macaddress, stateDir);
} else {
int vlanid = 0; /* assure any current vlan tag is reset */
if (vlan) {
if (vlan->nTags != 1 || vlan->trunk) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("vlan trunking is not supported "
"by SR-IOV network devices"));
goto cleanup;
}
vlanid = vlan->tag[0];
}
ret = virNetDevReplaceVfConfig(linkdev, vf, macaddress, vlanid,
stateDir);
}
cleanup:
VIR_FREE(pfdevname);
return ret;
}
/**
* virNetDevRestoreNetConfig:
* @linkdev: name of the interface
* @vf: vf index if linkdev is a pf
* @stateDir: directory containing old net config
*
* Returns 0 on success, -errno on failure.
*
*/
int
virNetDevRestoreNetConfig(const char *linkdev, int vf, const char *stateDir)
{
int ret = -1;
char *pfdevname = NULL;
const char *vfdevname = NULL;
if (vf == -1 && virNetDevIsVirtualFunction(linkdev) == 1) {
/* If this really *is* a VF and the caller just didn't know
* it, we should set the MAC address via PF+vf# instead of
* setting directly via VF, because the latter will be
* rejected any time after the former has been done.
*/
if (virNetDevGetPhysicalFunction(linkdev, &pfdevname) < 0)
goto cleanup;
if (virNetDevGetVirtualFunctionIndex(pfdevname, linkdev, &vf) < 0)
goto cleanup;
vfdevname = linkdev;
linkdev = pfdevname;
}
if (vf == -1)
ret = virNetDevRestoreMacAddress(linkdev, stateDir);
else
ret = virNetDevRestoreVfConfig(linkdev, vf, vfdevname, stateDir);
cleanup:
VIR_FREE(pfdevname);
return ret;
}
#else /* defined(__linux__) && defined(HAVE_LIBNL) */
int
virNetDevLinkDump(const char *ifname ATTRIBUTE_UNUSED,
int ifindex ATTRIBUTE_UNUSED,
void **nlData ATTRIBUTE_UNUSED,
struct nlattr **tb ATTRIBUTE_UNUSED,
uint32_t src_pid ATTRIBUTE_UNUSED,
uint32_t dst_pid ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to dump link info on this platform"));
return -1;
}
int
virNetDevReplaceNetConfig(const char *linkdev ATTRIBUTE_UNUSED,
int vf ATTRIBUTE_UNUSED,
const virMacAddr *macaddress ATTRIBUTE_UNUSED,
virNetDevVlanPtr vlan ATTRIBUTE_UNUSED,
const char *stateDir ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to replace net config on this platform"));
return -1;
}
int
virNetDevRestoreNetConfig(const char *linkdev ATTRIBUTE_UNUSED,
int vf ATTRIBUTE_UNUSED,
const char *stateDir ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to restore net config on this platform"));
return -1;
}
#endif /* defined(__linux__) && defined(HAVE_LIBNL) */
#ifdef __linux__
int
virNetDevGetLinkInfo(const char *ifname,
virInterfaceLinkPtr lnk)
{
int ret = -1;
char *path = NULL;
char *buf = NULL;
char *tmp;
int tmp_state;
unsigned int tmp_speed;
if (virNetDevSysfsFile(&path, ifname, "operstate") < 0)
goto cleanup;
if (virFileReadAll(path, 1024, &buf) < 0) {
virReportSystemError(errno,
_("unable to read: %s"),
path);
goto cleanup;
}
if (!(tmp = strchr(buf, '\n'))) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unable to parse: %s"),
buf);
goto cleanup;
}
*tmp = '\0';
/* We shouldn't allow 0 here, because
* virInterfaceState enum starts from 1. */
if ((tmp_state = virInterfaceStateTypeFromString(buf)) <= 0) {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unable to parse: %s"),
buf);
goto cleanup;
}
lnk->state = tmp_state;
/* Shortcut to avoid some kernel issues. If link is not up several drivers
* report several misleading values. While igb reports 65535, realtek goes
* with 10. To avoid muddying XML with insane values, don't report link
* speed if that's the case. */
if (lnk->state != VIR_INTERFACE_STATE_UP) {
lnk->speed = 0;
ret = 0;
goto cleanup;
}
VIR_FREE(path);
VIR_FREE(buf);
if (virNetDevSysfsFile(&path, ifname, "speed") < 0)
goto cleanup;
if (virFileReadAllQuiet(path, 1024, &buf) < 0) {
/* Some devices doesn't report speed, in which case we get EINVAL */
if (errno == EINVAL) {
ret = 0;
goto cleanup;
}
virReportSystemError(errno,
_("unable to read: %s"),
path);
goto cleanup;
}
if (virStrToLong_ui(buf, &tmp, 10, &tmp_speed) < 0 ||
*tmp != '\n') {
virReportError(VIR_ERR_INTERNAL_ERROR,
_("Unable to parse: %s"),
buf);
goto cleanup;
}
lnk->speed = tmp_speed;
ret = 0;
cleanup:
VIR_FREE(buf);
VIR_FREE(path);
return ret;
}
#else
int
virNetDevGetLinkInfo(const char *ifname,
virInterfaceLinkPtr lnk)
{
/* Port me */
VIR_DEBUG("Getting link info on %s is not implemented on this platform",
ifname);
lnk->speed = lnk->state = 0;
return 0;
}
#endif /* defined(__linux__) */
#if defined(SIOCADDMULTI) && defined(HAVE_STRUCT_IFREQ) && \
defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
/**
* virNetDevAddMulti:
* @ifname: interface name to which to add multicast MAC address
* @macaddr: MAC address
*
* This function adds the @macaddr to the multicast list for a given interface
* @ifname.
*
* Returns 0 in case of success or -1 on failure
*/
int virNetDevAddMulti(const char *ifname,
virMacAddrPtr macaddr)
{
int fd = -1;
int ret = -1;
struct ifreq ifr;
if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
return -1;
ifr.ifr_hwaddr.sa_family = AF_UNSPEC;
virMacAddrGetRaw(macaddr, (unsigned char *)ifr.ifr_hwaddr.sa_data);
if (ioctl(fd, SIOCADDMULTI, &ifr) < 0) {
char macstr[VIR_MAC_STRING_BUFLEN];
virReportSystemError(errno,
_("Cannot add multicast MAC %s on '%s' interface"),
virMacAddrFormat(macaddr, macstr), ifname);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#else
int virNetDevAddMulti(const char *ifname ATTRIBUTE_UNUSED,
virMacAddrPtr macaddr ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to add address to interface "
"multicast list on this platform"));
return -1;
}
#endif
#if defined(SIOCDELMULTI) && defined(HAVE_STRUCT_IFREQ) && \
defined(HAVE_STRUCT_IFREQ_IFR_HWADDR)
/**
* virNetDevDelMulti:
* @ifname: interface name from which to delete the multicast MAC address
* @macaddr: MAC address
*
* This function deletes the @macaddr from the multicast list for a given
* interface @ifname.
*
* Returns 0 in case of success or -1 on failure
*/
int virNetDevDelMulti(const char *ifname,
virMacAddrPtr macaddr)
{
int fd = -1;
int ret = -1;
struct ifreq ifr;
if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
return -1;
ifr.ifr_hwaddr.sa_family = AF_UNSPEC;
virMacAddrGetRaw(macaddr, (unsigned char *)ifr.ifr_hwaddr.sa_data);
if (ioctl(fd, SIOCDELMULTI, &ifr) < 0) {
char macstr[VIR_MAC_STRING_BUFLEN];
virReportSystemError(errno,
_("Cannot add multicast MAC %s on '%s' interface"),
virMacAddrFormat(macaddr, macstr), ifname);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#else
int virNetDevDelMulti(const char *ifname ATTRIBUTE_UNUSED,
virMacAddrPtr macaddr ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to delete address from interface "
"multicast list on this platform"));
return -1;
}
#endif
static int virNetDevParseMcast(char *buf, virNetDevMcastEntryPtr mcast)
{
int ifindex;
int num;
char *next;
char *token;
char *saveptr;
char *endptr;
for (ifindex = VIR_MCAST_TYPE_INDEX_TOKEN, next = buf; ifindex < VIR_MCAST_TYPE_LAST; ifindex++,
next = NULL) {
token = strtok_r(next, VIR_MCAST_TOKEN_DELIMS, &saveptr);
if (token == NULL) {
virReportSystemError(EINVAL,
_("failed to parse multicast address from '%s'"),
buf);
return -1;
}
switch ((virMCastType)ifindex) {
case VIR_MCAST_TYPE_INDEX_TOKEN:
if (virStrToLong_i(token, &endptr, 10, &num) < 0) {
virReportSystemError(EINVAL,
_("Failed to parse interface index from '%s'"),
buf);
return -1;
}
mcast->idx = num;
break;
case VIR_MCAST_TYPE_NAME_TOKEN:
if (virStrncpy(mcast->name, token, strlen(token),
VIR_MCAST_NAME_LEN) == NULL) {
virReportSystemError(EINVAL,
_("Failed to parse network device name from '%s'"),
buf);
return -1;
}
break;
case VIR_MCAST_TYPE_USERS_TOKEN:
if (virStrToLong_i(token, &endptr, 10, &num) < 0) {
virReportSystemError(EINVAL,
_("Failed to parse users from '%s'"),
buf);
return -1;
}
mcast->users = num;
break;
case VIR_MCAST_TYPE_GLOBAL_TOKEN:
if (virStrToLong_i(token, &endptr, 10, &num) < 0) {
virReportSystemError(EINVAL,
_("Failed to parse users from '%s'"),
buf);
return -1;
}
mcast->global = num;
break;
case VIR_MCAST_TYPE_ADDR_TOKEN:
if (virMacAddrParseHex((const char*)token,
&mcast->macaddr) < 0) {
virReportSystemError(EINVAL,
_("Failed to parse MAC address from '%s'"),
buf);
}
break;
/* coverity[dead_error_begin] */
case VIR_MCAST_TYPE_LAST:
break;
}
}
return 0;
}
static void virNetDevMcastListClear(virNetDevMcastListPtr mcast)
{
size_t i;
for (i = 0; i < mcast->nentries; i++)
VIR_FREE(mcast->entries[i]);
VIR_FREE(mcast->entries);
mcast->nentries = 0;
}
static int virNetDevGetMcastList(const char *ifname,
virNetDevMcastListPtr mcast)
{
char *cur = NULL;
char *buf = NULL;
char *next = NULL;
int ret = -1, len;
virNetDevMcastEntryPtr entry = NULL;
mcast->entries = NULL;
mcast->nentries = 0;
/* Read entire multicast table into memory */
if ((len = virFileReadAll(PROC_NET_DEV_MCAST, MAX_MCAST_SIZE, &buf)) <= 0)
goto cleanup;
cur = buf;
while (cur) {
if (!entry && VIR_ALLOC(entry) < 0)
goto cleanup;
next = strchr(cur, '\n');
if (next)
next++;
if (virNetDevParseMcast(cur, entry))
goto cleanup;
/* Only return global multicast MAC addresses for
* specified interface */
if (entry->global && STREQ(ifname, entry->name)) {
if (VIR_APPEND_ELEMENT(mcast->entries, mcast->nentries, entry))
goto cleanup;
} else {
memset(entry, 0, sizeof(virNetDevMcastEntry));
}
cur = next && ((next - buf) < len) ? next : NULL;
}
ret = 0;
cleanup:
VIR_FREE(buf);
VIR_FREE(entry);
return ret;
}
VIR_ENUM_IMPL(virNetDevRxFilterMode,
VIR_NETDEV_RX_FILTER_MODE_LAST,
"none",
"normal",
"all");
static int virNetDevGetMulticastTable(const char *ifname,
virNetDevRxFilterPtr filter)
{
size_t i;
int ret = -1;
virNetDevMcastList mcast;
filter->multicast.nTable = 0;
filter->multicast.table = NULL;
if (virNetDevGetMcastList(ifname, &mcast) < 0)
goto cleanup;
if (mcast.nentries > 0) {
if (VIR_ALLOC_N(filter->multicast.table, mcast.nentries) < 0)
goto cleanup;
for (i = 0; i < mcast.nentries; i++) {
virMacAddrSet(&filter->multicast.table[i],
&mcast.entries[i]->macaddr);
}
filter->multicast.nTable = mcast.nentries;
}
ret = 0;
cleanup:
virNetDevMcastListClear(&mcast);
return ret;
}
virNetDevRxFilterPtr
virNetDevRxFilterNew(void)
{
virNetDevRxFilterPtr filter;
if (VIR_ALLOC(filter) < 0)
return NULL;
return filter;
}
void
virNetDevRxFilterFree(virNetDevRxFilterPtr filter)
{
if (filter) {
VIR_FREE(filter->name);
VIR_FREE(filter->unicast.table);
VIR_FREE(filter->multicast.table);
VIR_FREE(filter->vlan.table);
VIR_FREE(filter);
}
}
/**
* virNetDevGetRxFilter:
* This function supplies the RX filter list for a given device interface
*
* @ifname: Name of the interface
* @filter: The RX filter list
*
* Returns 0 or -1 on failure.
*/
int virNetDevGetRxFilter(const char *ifname,
virNetDevRxFilterPtr *filter)
{
int ret = -1;
bool receive = false;
virNetDevRxFilterPtr fil = virNetDevRxFilterNew();
if (!fil)
goto cleanup;
if (virNetDevGetMAC(ifname, &fil->mac))
goto cleanup;
if (virNetDevGetMulticastTable(ifname, fil))
goto cleanup;
if (virNetDevGetPromiscuous(ifname, &fil->promiscuous))
goto cleanup;
if (virNetDevGetRcvAllMulti(ifname, &receive))
goto cleanup;
if (receive) {
fil->multicast.mode = VIR_NETDEV_RX_FILTER_MODE_ALL;
} else {
if (virNetDevGetRcvMulti(ifname, &receive))
goto cleanup;
if (receive)
fil->multicast.mode = VIR_NETDEV_RX_FILTER_MODE_NORMAL;
else
fil->multicast.mode = VIR_NETDEV_RX_FILTER_MODE_NONE;
}
ret = 0;
cleanup:
if (ret < 0) {
virNetDevRxFilterFree(fil);
fil = NULL;
}
*filter = fil;
return ret;
}
#if defined(SIOCETHTOOL) && defined(HAVE_STRUCT_IFREQ)
/**
* virNetDevRDMAFeature
* This function checks for the availability of RDMA feature
* and add it to bitmap
*
* @ifname: name of the interface
* @out: add RDMA feature if exist to bitmap
*
* Returns 0 on success, -1 on failure.
*/
static int
virNetDevRDMAFeature(const char *ifname,
virBitmapPtr *out)
{
char *eth_devpath = NULL;
char *ib_devpath = NULL;
char *eth_res_buf = NULL;
char *ib_res_buf = NULL;
DIR *dirp = NULL;
struct dirent *dp;
int ret = -1;
if (!virFileExists(SYSFS_INFINIBAND_DIR))
return 0;
if (!(dirp = opendir(SYSFS_INFINIBAND_DIR))) {
virReportSystemError(errno,
_("Failed to opendir path '%s'"),
SYSFS_INFINIBAND_DIR);
return -1;
}
if (virAsprintf(&eth_devpath, SYSFS_NET_DIR "%s/device/resource", ifname) < 0)
goto cleanup;
if (!virFileExists(eth_devpath))
goto cleanup;
if (virFileReadAll(eth_devpath, RESOURCE_FILE_LEN, &eth_res_buf) < 0)
goto cleanup;
while (virDirRead(dirp, &dp, SYSFS_INFINIBAND_DIR) > 0) {
if (dp->d_name[0] == '.')
continue;
if (virAsprintf(&ib_devpath, SYSFS_INFINIBAND_DIR "%s/device/resource",
dp->d_name) < 0)
continue;
if (virFileReadAll(ib_devpath, RESOURCE_FILE_LEN, &ib_res_buf) > 0 &&
STREQ(eth_res_buf, ib_res_buf)) {
ignore_value(virBitmapSetBit(*out, VIR_NET_DEV_FEAT_RDMA));
break;
}
VIR_FREE(ib_devpath);
VIR_FREE(ib_res_buf);
}
ret = 0;
cleanup:
closedir(dirp);
VIR_FREE(eth_devpath);
VIR_FREE(ib_devpath);
VIR_FREE(eth_res_buf);
VIR_FREE(ib_res_buf);
return ret;
}
/**
* virNetDevSendEthtoolIoctl
* This function sends ethtool ioctl request
*
* @ifname: name of the interface
* @cmd: reference to an ethtool command structure
*
* Returns 0 on success, -1 on failure.
*/
static int
virNetDevSendEthtoolIoctl(const char *ifname, void *cmd)
{
int ret = -1;
int fd = -1;
struct ifreq ifr;
/* Ultimately uses AF_PACKET for socket which requires privileged
* daemon support.
*/
if ((fd = virNetDevSetupControl(ifname, &ifr)) < 0)
return ret;
ifr.ifr_data = cmd;
ret = ioctl(fd, SIOCETHTOOL, &ifr);
if (ret != 0) {
switch (errno) {
case EINVAL: /* kernel doesn't support SIOCETHTOOL */
VIR_DEBUG("ethtool ioctl: invalid request");
break;
case EOPNOTSUPP: /* kernel doesn't support specific feature */
VIR_DEBUG("ethtool ioctl: request not supported");
break;
default:
virReportSystemError(errno, "%s", _("ethtool ioctl error"));
goto cleanup;
}
}
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
struct virNetDevEthtoolFeatureCmd {
const int cmd;
const virNetDevFeature feat;
};
/**
* virNetDevFeatureAvailable
* This function checks for the availability of a network device feature
*
* @ifname: name of the interface
* @cmd: reference to an ethtool command structure
*
* Returns 0 if not found, 1 on success, and -1 on failure.
*/
static int
virNetDevFeatureAvailable(const char *ifname, struct ethtool_value *cmd)
{
int ret = -1;
cmd = (void*)cmd;
if (!virNetDevSendEthtoolIoctl(ifname, cmd))
ret = cmd->data > 0 ? 1 : 0;
return ret;
}
static void
virNetDevGetEthtoolFeatures(virBitmapPtr bitmap,
const char *ifname)
{
size_t i;
struct ethtool_value cmd = { 0 };
/* legacy ethtool getters */
struct virNetDevEthtoolFeatureCmd ethtool_cmds[] = {
{ETHTOOL_GRXCSUM, VIR_NET_DEV_FEAT_GRXCSUM},
{ETHTOOL_GTXCSUM, VIR_NET_DEV_FEAT_GTXCSUM},
{ETHTOOL_GSG, VIR_NET_DEV_FEAT_GSG},
{ETHTOOL_GTSO, VIR_NET_DEV_FEAT_GTSO},
# if HAVE_DECL_ETHTOOL_GGSO
{ETHTOOL_GGSO, VIR_NET_DEV_FEAT_GGSO},
# endif
# if HAVE_DECL_ETHTOOL_GGRO
{ETHTOOL_GGRO, VIR_NET_DEV_FEAT_GGRO},
# endif
};
# if HAVE_DECL_ETHTOOL_GFLAGS
/* ethtool masks */
struct virNetDevEthtoolFeatureCmd flags[] = {
# if HAVE_DECL_ETH_FLAG_LRO
{ETH_FLAG_LRO, VIR_NET_DEV_FEAT_LRO},
# endif
# if HAVE_DECL_ETH_FLAG_TXVLAN
{ETH_FLAG_RXVLAN, VIR_NET_DEV_FEAT_RXVLAN},
{ETH_FLAG_TXVLAN, VIR_NET_DEV_FEAT_TXVLAN},
# endif
# if HAVE_DECL_ETH_FLAG_NTUBLE
{ETH_FLAG_NTUPLE, VIR_NET_DEV_FEAT_NTUPLE},
# endif
# if HAVE_DECL_ETH_FLAG_RXHASH
{ETH_FLAG_RXHASH, VIR_NET_DEV_FEAT_RXHASH},
# endif
};
# endif
for (i = 0; i < ARRAY_CARDINALITY(ethtool_cmds); i++) {
cmd.cmd = ethtool_cmds[i].cmd;
if (virNetDevFeatureAvailable(ifname, &cmd) == 1)
ignore_value(virBitmapSetBit(bitmap, ethtool_cmds[i].feat));
}
# if HAVE_DECL_ETHTOOL_GFLAGS
cmd.cmd = ETHTOOL_GFLAGS;
if (virNetDevFeatureAvailable(ifname, &cmd) == 1) {
for (i = 0; i < ARRAY_CARDINALITY(flags); i++) {
if (cmd.data & flags[i].cmd)
ignore_value(virBitmapSetBit(bitmap, flags[i].feat));
}
}
# endif
}
# if HAVE_DECL_ETHTOOL_GFEATURES
/**
* virNetDevGFeatureAvailable
* This function checks for the availability of a network device gfeature
*
* @ifname: name of the interface
* @cmd: reference to a gfeatures ethtool command structure
*
* Returns 0 if not found, 1 on success, and -1 on failure.
*/
static int
virNetDevGFeatureAvailable(const char *ifname, struct ethtool_gfeatures *cmd)
{
int ret = -1;
cmd = (void*)cmd;
if (!virNetDevSendEthtoolIoctl(ifname, cmd))
ret = FEATURE_BIT_IS_SET(cmd->features, TX_UDP_TNL, active);
return ret;
}
static int
virNetDevGetEthtoolGFeatures(virBitmapPtr bitmap,
const char *ifname)
{
struct ethtool_gfeatures *g_cmd;
if (VIR_ALLOC_VAR(g_cmd,
struct ethtool_get_features_block, GFEATURES_SIZE) < 0)
return -1;
g_cmd->cmd = ETHTOOL_GFEATURES;
g_cmd->size = GFEATURES_SIZE;
if (virNetDevGFeatureAvailable(ifname, g_cmd) == 1)
ignore_value(virBitmapSetBit(bitmap, VIR_NET_DEV_FEAT_TXUDPTNL));
VIR_FREE(g_cmd);
return 0;
}
# else
static int
virNetDevGetEthtoolGFeatures(virBitmapPtr bitmap ATTRIBUTE_UNUSED,
const char *ifname ATTRIBUTE_UNUSED)
{
return 0;
}
# endif
/**
* virNetDevGetFeatures:
* This function gets the nic offloads features available for ifname
*
* @ifname: name of the interface
* @out: bitmap of the available virNetDevFeature feature bits
*
* Returns 0 on success or if called from session mode, -1 on failure.
* If called from session mode, an empty bitmap is returned.
*/
int
virNetDevGetFeatures(const char *ifname,
virBitmapPtr *out)
{
if (!(*out = virBitmapNew(VIR_NET_DEV_FEAT_LAST)))
return -1;
/* Only fetch features if we're privileged, but no need to fail */
if (geteuid() != 0) {
VIR_DEBUG("ETHTOOL feature bits not available in session mode");
return 0;
}
virNetDevGetEthtoolFeatures(*out, ifname);
if (virNetDevGetEthtoolGFeatures(*out, ifname) < 0)
return -1;
if (virNetDevRDMAFeature(ifname, out) < 0)
return -1;
return 0;
}
#else
int
virNetDevGetFeatures(const char *ifname ATTRIBUTE_UNUSED,
virBitmapPtr *out ATTRIBUTE_UNUSED)
{
VIR_DEBUG("Getting network device features on %s is not implemented on this platform",
ifname);
return 0;
}
#endif
/**
* virNetDevRunEthernetScript:
* @ifname: the interface name
* @script: the script name
*
* This function executes script for new tap device created by libvirt.
* Returns 0 in case of success or -1 on failure
*/
int
virNetDevRunEthernetScript(const char *ifname, const char *script)
{
virCommandPtr cmd;
int ret;
cmd = virCommandNew(script);
virCommandAddArgFormat(cmd, "%s", ifname);
virCommandClearCaps(cmd);
#ifdef CAP_NET_ADMIN
virCommandAllowCap(cmd, CAP_NET_ADMIN);
#endif
virCommandAddEnvPassCommon(cmd);
ret = virCommandRun(cmd, NULL);
virCommandFree(cmd);
return ret;
}
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