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libvirt/src/util/virnetdev.c
Philipp Hahn d7451bddc5 virnetdev: Check for defined IFLA_VF_* 
The linux-2.6.32 kernel header does not yet define IFLA_VF_MAX and others,
which breaks compiling a new libvirt on old systems like Debian Squeeze.

(I also have to add --without-macvtap --disable-werror --without-virtualport to
 ./configure to get it to compile.)

Signed-off-by: Philipp Hahn <hahn@univention.de>
2012-04-13 21:15:22 +02:00

1695 lines
43 KiB
C
Raw Blame History

/*
* Copyright (C) 2007-2012 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* 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 "virterror_internal.h"
#include "command.h"
#include "memory.h"
#include "pci.h"
#include <sys/ioctl.h>
#ifdef HAVE_NET_IF_H
# include <net/if.h>
#endif
#include <fcntl.h>
#ifdef __linux__
# include <linux/sockios.h>
# include <linux/if_vlan.h>
#elif !defined(AF_PACKET)
# undef HAVE_STRUCT_IFREQ
#endif
#define VIR_FROM_THIS VIR_FROM_NONE
#define virNetDevError(code, ...) \
virReportErrorHelper(VIR_FROM_THIS, code, __FILE__, \
__FUNCTION__, __LINE__, __VA_ARGS__)
#if defined(HAVE_STRUCT_IFREQ)
static int virNetDevSetupControlFull(const char *ifname,
struct ifreq *ifr,
int domain,
int type)
{
int fd;
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;
}
static int virNetDevSetupControl(const char *ifname,
struct ifreq *ifr)
{
return virNetDevSetupControlFull(ifname, ifr, AF_PACKET, SOCK_DGRAM);
}
#endif
#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)
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(HAVE_STRUCT_IFREQ)
/**
* virNetDevSetMAC:
* @ifname: interface name to set MTU for
* @macaddr: MAC address (VIR_MAC_BUFLEN in size)
*
* 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 unsigned char *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;
}
memcpy(ifr.ifr_hwaddr.sa_data, macaddr, VIR_MAC_BUFLEN);
if (ioctl(fd, SIOCSIFHWADDR, &ifr) < 0) {
virReportSystemError(errno,
_("Cannot set interface MAC on '%s'"),
ifname);
goto cleanup;
}
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#else
int virNetDevSetMAC(const char *ifname,
const unsigned char *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 (VIR_MAC_BUFLEN in size)
*
* 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,
unsigned char *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;
}
memcpy(macaddr, ifr.ifr_hwaddr.sa_data, VIR_MAC_BUFLEN);
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#else
int virNetDevGetMAC(const char *ifname,
unsigned char *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 unsigned char *macaddress,
const char *stateDir)
{
unsigned char oldmac[6];
char *path = NULL;
char macstr[VIR_MAC_STRING_BUFLEN];
if (virNetDevGetMAC(linkdev, oldmac) < 0)
return -1;
if (virAsprintf(&path, "%s/%s",
stateDir,
linkdev) < 0) {
virReportOOMError();
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);
return -1;
}
if (virNetDevSetMAC(linkdev, macaddress) < 0)
return -1;
return 0;
}
/**
* 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;
char *oldmacname = NULL;
char *macstr = NULL;
char *path = NULL;
unsigned char oldmac[6];
if (virAsprintf(&path, "%s/%s",
stateDir,
linkdev) < 0) {
virReportOOMError();
return -1;
}
if (virFileReadAll(path, VIR_MAC_STRING_BUFLEN, &macstr) < 0)
return -1;
if (virMacAddrParse(macstr, &oldmac[0]) != 0) {
virNetDevError(VIR_ERR_INTERNAL_ERROR,
_("Cannot parse MAC address from '%s'"),
oldmacname);
VIR_FREE(macstr);
return -1;
}
/*reset mac and remove file-ignore results*/
rc = virNetDevSetMAC(linkdev, oldmac);
ignore_value(unlink(path));
VIR_FREE(macstr);
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 rc;
char *pid = NULL;
const char *argv[] = {
"ip", "link", "set", ifname, "netns", NULL, NULL
};
if (virAsprintf(&pid, "%lld", (long long) pidInNs) == -1) {
virReportOOMError();
return -1;
}
argv[5] = pid;
rc = virRun(argv, NULL);
VIR_FREE(pid);
return rc;
}
#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;
if (virStrcpyStatic(ifr.ifr_newname, newifname) == NULL) {
virReportSystemError(ERANGE,
_("Network interface name '%s' is too long"),
newifname);
goto cleanup;
}
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)
/**
* 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)
{
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 (online)
ifflags = ifr.ifr_flags | IFF_UP;
else
ifflags = ifr.ifr_flags & ~IFF_UP;
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
int virNetDevSetOnline(const char *ifname,
bool online ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS,
_("Cannot set interface flags on '%s'"),
ifname);
return -1;
}
#endif
#if defined(SIOCGIFFLAGS) && defined(HAVE_STRUCT_IFREQ)
/**
* virNetDevIsOnline:
* @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 virNetDevIsOnline(const char *ifname,
bool *online)
{
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;
}
*online = (ifr.ifr_flags & IFF_UP) ? true : false;
ret = 0;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#else
int virNetDevIsOnline(const char *ifname,
bool *online ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS,
_("Cannot get interface flags on '%s'"),
ifname);
return -1;
}
#endif
/**
* 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(PF_PACKET, 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;
}
*ifindex = ifreq.ifr_ifindex;
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)
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 */
/**
* virNetDevSetIPv4Address:
* @ifname: the interface name
* @addr: the IP address (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 virNetDevSetIPv4Address(const char *ifname,
virSocketAddr *addr,
unsigned int prefix)
{
virCommandPtr cmd = NULL;
char *addrstr = NULL, *bcaststr = NULL;
virSocketAddr broadcast;
int ret = -1;
if (!(addrstr = virSocketAddrFormat(addr)))
goto cleanup;
/* format up a broadcast address if this is IPv4 */
if ((VIR_SOCKET_ADDR_IS_FAMILY(addr, AF_INET)) &&
((virSocketAddrBroadcastByPrefix(addr, prefix, &broadcast) < 0) ||
!(bcaststr = virSocketAddrFormat(&broadcast)))) {
goto cleanup;
}
cmd = virCommandNew(IP_PATH);
virCommandAddArgList(cmd, "addr", "add", NULL);
virCommandAddArgFormat(cmd, "%s/%u", addrstr, prefix);
if (bcaststr)
virCommandAddArgList(cmd, "broadcast", bcaststr, NULL);
virCommandAddArgList(cmd, "dev", ifname, NULL);
if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FREE(addrstr);
VIR_FREE(bcaststr);
virCommandFree(cmd);
return ret;
}
/**
* virNetDevClearIPv4Address:
* @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 virNetDevClearIPv4Address(const char *ifname,
virSocketAddr *addr,
unsigned int prefix)
{
virCommandPtr cmd = NULL;
char *addrstr;
int ret = -1;
if (!(addrstr = virSocketAddrFormat(addr)))
goto cleanup;
cmd = virCommandNew(IP_PATH);
virCommandAddArgList(cmd, "addr", "del", NULL);
virCommandAddArgFormat(cmd, "%s/%u", addrstr, prefix);
virCommandAddArgList(cmd, "dev", ifname, NULL);
if (virCommandRun(cmd, NULL) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FREE(addrstr);
virCommandFree(cmd);
return ret;
}
/**
* virNetDevGetIPv4Address:
* @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)
int virNetDevGetIPv4Address(const char *ifname,
virSocketAddrPtr addr)
{
int fd = -1;
int ret = -1;
struct ifreq ifr;
memset(addr, 0, sizeof(*addr));
addr->data.stor.ss_family = AF_UNSPEC;
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"), 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 */
int virNetDevGetIPv4Address(const char *ifname ATTRIBUTE_UNUSED,
virSocketAddrPtr addr ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to get IPv4 address on this platform"));
return -1;
}
#endif /* ! SIOCGIFADDR */
/**
* 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(HAVE_STRUCT_IFREQ)
int virNetDevValidateConfig(const char *ifname,
const unsigned char *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 (memcmp(&ifr.ifr_hwaddr.sa_data, macaddr, VIR_MAC_BUFLEN) != 0) {
ret = 0;
goto cleanup;
}
}
if (ifindex != -1) {
if (virNetDevGetIndex(ifname, &idx) < 0)
goto cleanup;
else if (idx != ifindex) {
ret = 0;
goto cleanup;
}
}
ret = 1;
cleanup:
VIR_FORCE_CLOSE(fd);
return ret;
}
#else /* ! HAVE_STRUCT_IFREQ */
int virNetDevValidateConfig(const char *ifname ATTRIBUTE_UNUSED,
const unsigned char *macaddr ATTRIBUTE_UNUSED,
int ifindex ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to check interface config on this platform"));
return -1;
}
#endif /* ! HAVE_STRUCT_IFREQ */
#ifdef __linux__
# define NET_SYSFS "/sys/class/net/"
static int
virNetDevSysfsFile(char **pf_sysfs_device_link, const char *ifname,
const char *file)
{
if (virAsprintf(pf_sysfs_device_link, NET_SYSFS "%s/%s",
ifname, file) < 0) {
virReportOOMError();
return -1;
}
return 0;
}
static int
virNetDevSysfsDeviceFile(char **pf_sysfs_device_link, const char *ifname,
const char *file)
{
if (virAsprintf(pf_sysfs_device_link, NET_SYSFS "%s/device/%s",
ifname, file) < 0) {
virReportOOMError();
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,
unsigned int *n_vfname)
{
int ret = -1, i;
char *pf_sysfs_device_link = NULL;
char *pci_sysfs_device_link = NULL;
struct pci_config_address **virt_fns;
char *pciConfigAddr;
if (virNetDevSysfsFile(&pf_sysfs_device_link, pfname, "device") < 0)
return ret;
if (pciGetVirtualFunctions(pf_sysfs_device_link, &virt_fns,
n_vfname) < 0)
goto cleanup;
if (VIR_ALLOC_N(*vfname, *n_vfname) < 0) {
virReportOOMError();
goto cleanup;
}
for (i = 0; i < *n_vfname; i++)
{
if (pciGetDeviceAddrString(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 (pciSysfsFile(pciConfigAddr, &pci_sysfs_device_link) < 0) {
virReportSystemError(ENOSYS, "%s",
_("Failed to get PCI SYSFS file"));
goto cleanup;
}
if (pciDeviceNetName(pci_sysfs_device_link, &((*vfname)[i])) < 0) {
virReportSystemError(ENOSYS, "%s",
_("Failed to get interface name of the VF"));
goto cleanup;
}
}
ret = 0;
cleanup:
if (ret < 0)
VIR_FREE(*vfname);
for (i = 0; i < *n_vfname; i++)
VIR_FREE(virt_fns[i]);
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 = pciDeviceIsVirtualFunction(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 = pciGetVirtualFunctionIndex(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 = pciDeviceNetName(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 = pciGetVirtualFunctionIndex(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,
unsigned int *n_vfname 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;
}
#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
* @nltarget_kernel: whether to send the message to the kernel or another
* process
* @nlattr: pointer to a pointer of netlink attributes that will contain
* the results
* @recvbuf: Pointer to the buffer holding the returned netlink response
* message; free it, once not needed anymore
* @getPidFunc: Pointer to a function that will be invoked if the kernel
* is not the target of the netlink message but it is to be
* sent to another process.
*
* Get information about an interface given its name or index.
*
* Returns 0 on success, -1 on fatal error.
*/
int
virNetDevLinkDump(const char *ifname, int ifindex,
bool nltarget_kernel, struct nlattr **tb,
unsigned char **recvbuf,
uint32_t (*getPidFunc)(void))
{
int rc = -1;
struct nlmsghdr *resp;
struct nlmsgerr *err;
struct ifinfomsg ifinfo = {
.ifi_family = AF_UNSPEC,
.ifi_index = ifindex
};
unsigned int recvbuflen;
uint32_t pid = 0;
struct nl_msg *nl_msg;
*recvbuf = NULL;
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;
}
if (!nltarget_kernel) {
pid = getPidFunc();
if (pid == 0) {
goto cleanup;
}
}
if (virNetlinkCommand(nl_msg, recvbuf, &recvbuflen, pid) < 0)
goto cleanup;
if (recvbuflen < NLMSG_LENGTH(0) || *recvbuf == NULL)
goto malformed_resp;
resp = (struct nlmsghdr *)*recvbuf;
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:
if (rc < 0)
VIR_FREE(*recvbuf);
nlmsg_free(nl_msg);
return rc;
malformed_resp:
virNetDevError(VIR_ERR_INTERNAL_ERROR, "%s",
_("malformed netlink response message"));
goto cleanup;
buffer_too_small:
virNetDevError(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 unsigned char *macaddr,
int vlanid, uint32_t (*getPidFunc)(void))
{
int rc = -1;
struct nlmsghdr *resp;
struct nlmsgerr *err;
unsigned char *recvbuf = NULL;
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, },
};
memcpy(ifla_vf_mac.mac, macaddr, VIR_MAC_BUFLEN);
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, &recvbuf, &recvbuflen, pid) < 0)
goto cleanup;
if (recvbuflen < NLMSG_LENGTH(0) || recvbuf == NULL)
goto malformed_resp;
resp = (struct nlmsghdr *)recvbuf;
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 during set %s of ifindex %d"),
(macaddr ? (vlanid >= 0 ? "mac/vlan" : "mac") : "vlanid"),
ifindex);
goto cleanup;
}
break;
case NLMSG_DONE:
break;
default:
goto malformed_resp;
}
rc = 0;
cleanup:
nlmsg_free(nl_msg);
VIR_FREE(recvbuf);
return rc;
malformed_resp:
virNetDevError(VIR_ERR_INTERNAL_ERROR, "%s",
_("malformed netlink response message"));
goto cleanup;
buffer_too_small:
virNetDevError(VIR_ERR_INTERNAL_ERROR, "%s",
_("allocated netlink buffer is too small"));
goto cleanup;
}
static int
virNetDevParseVfConfig(struct nlattr **tb, int32_t vf, unsigned char *mac,
int *vlanid)
{
const char *msg = NULL;
int rc = -1;
if (tb[IFLA_VFINFO_LIST]) {
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 found = 0;
int rem;
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)) {
msg = _("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) {
memcpy(mac, vf_mac->mac, VIR_MAC_BUFLEN);
found = 1;
}
}
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;
found = 1;
}
}
if (found) {
rc = 0;
break;
}
}
}
cleanup:
if (msg)
virNetDevError(VIR_ERR_INTERNAL_ERROR, "%s", msg);
return rc;
}
static int
virNetDevGetVfConfig(const char *ifname, int vf, unsigned char *mac,
int *vlanid)
{
int rc = -1;
unsigned char *recvbuf = NULL;
struct nlattr *tb[IFLA_MAX + 1] = {NULL, };
int ifindex = -1;
rc = virNetDevLinkDump(ifname, ifindex, true, tb, &recvbuf, NULL);
if (rc < 0)
return rc;
rc = virNetDevParseVfConfig(tb, vf, mac, vlanid);
VIR_FREE(recvbuf);
return rc;
}
static int
virNetDevReplaceVfConfig(const char *pflinkdev, int vf,
const unsigned char *macaddress,
int vlanid,
const char *stateDir)
{
unsigned char oldmac[6];
int oldvlanid = -1;
char *path = NULL;
char macstr[VIR_MAC_STRING_BUFLEN];
int ifindex = -1;
if (virNetDevGetVfConfig(pflinkdev, vf, oldmac, &oldvlanid) < 0)
return -1;
if (virAsprintf(&path, "%s/%s_vf%d",
stateDir, pflinkdev, vf) < 0) {
virReportOOMError();
return -1;
}
virMacAddrFormat(oldmac, macstr);
if (virFileWriteStr(path, macstr, O_CREAT|O_TRUNC|O_WRONLY) < 0) {
virReportSystemError(errno, _("Unable to preserve mac for pf = %s,"
" vf = %d"), pflinkdev, vf);
VIR_FREE(path);
return -1;
}
VIR_FREE(path);
return virNetDevSetVfConfig(pflinkdev, ifindex, vf, true,
macaddress, vlanid, NULL);
}
static int
virNetDevRestoreVfConfig(const char *pflinkdev, int vf,
const char *stateDir)
{
int rc = -1;
char *macstr = NULL;
char *path = NULL;
unsigned char oldmac[6];
int vlanid = -1;
int ifindex = -1;
if (virAsprintf(&path, "%s/%s_vf%d",
stateDir, pflinkdev, vf) < 0) {
virReportOOMError();
return rc;
}
if (virFileReadAll(path, VIR_MAC_STRING_BUFLEN, &macstr) < 0) {
goto cleanup;
}
if (virMacAddrParse(macstr, &oldmac[0]) != 0) {
virNetDevError(VIR_ERR_INTERNAL_ERROR,
_("Cannot parse MAC address from '%s'"),
macstr);
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(macstr);
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(char *linkdev, int vf,
const unsigned char *macaddress, int vlanid,
char *stateDir)
{
if (vf == -1)
return virNetDevReplaceMacAddress(linkdev, macaddress, stateDir);
else
return virNetDevReplaceVfConfig(linkdev, vf, macaddress, vlanid,
stateDir);
}
/**
* 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(char *linkdev, int vf, char *stateDir)
{
if (vf == -1)
return virNetDevRestoreMacAddress(linkdev, stateDir);
else
return virNetDevRestoreVfConfig(linkdev, vf, stateDir);
}
#else /* defined(__linux__) && defined(HAVE_LIBNL) */
int
virNetDevLinkDump(const char *ifname ATTRIBUTE_UNUSED,
int ifindex ATTRIBUTE_UNUSED,
bool nltarget_kernel ATTRIBUTE_UNUSED,
struct nlattr **tb ATTRIBUTE_UNUSED,
unsigned char **recvbuf ATTRIBUTE_UNUSED,
uint32_t (*getPidFunc)(void) ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to dump link info on this platform"));
return -1;
}
int
virNetDevReplaceNetConfig(char *linkdev ATTRIBUTE_UNUSED,
int vf ATTRIBUTE_UNUSED,
const unsigned char *macaddress ATTRIBUTE_UNUSED,
int vlanid ATTRIBUTE_UNUSED,
char *stateDir ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to replace net config on this platform"));
return -1;
}
int
virNetDevRestoreNetConfig(char *linkdev ATTRIBUTE_UNUSED,
int vf ATTRIBUTE_UNUSED,
char *stateDir ATTRIBUTE_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Unable to restore net config on this platform"));
return -1;
}
#endif /* defined(__linux__) && defined(HAVE_LIBNL) */
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