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libvirt/src/util/virnetdevmacvlan.c
Michal Privoznik c8238579fb lib: Drop internal virXXXPtr typedefs 
Historically, we declared pointer type to our types:

  typedef struct _virXXX virXXX;
  typedef virXXX *virXXXPtr;

But usefulness of such declaration is questionable, at best.
Unfortunately, we can't drop every such declaration - we have to
carry some over, because they are part of public API (e.g.
virDomainPtr). But for internal types - we can do drop them and
use what every other C project uses 'virXXX *'.

This change was generated by a very ugly shell script that
generated sed script which was then called over each file in the
repository. For the shell script refer to the cover letter:

https://listman.redhat.com/archives/libvir-list/2021-March/msg00537.html

Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
2021-04-13 17:00:38 +02:00

969 lines
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/*
* Copyright (C) 2010-2017 Red Hat, Inc.
* Copyright (C) 2010-2012 IBM Corporation
*
* 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/>.
*
* Notes:
* netlink: http://lovezutto.googlepages.com/netlink.pdf
* iproute2 package
*
*/
#include <config.h>
#include "virnetdevmacvlan.h"
#include "virmacaddr.h"
#include "virerror.h"
#include "virthread.h"
#include "virstring.h"
#define VIR_FROM_THIS VIR_FROM_NET
VIR_ENUM_IMPL(virNetDevMacVLanMode,
VIR_NETDEV_MACVLAN_MODE_LAST,
"vepa",
"private",
"bridge",
"passthrough",
);
#if defined(WITH_LIBNL)
# include <fcntl.h>
# include <net/if.h>
# include <linux/if_tun.h>
# include "viralloc.h"
# include "virlog.h"
# include "viruuid.h"
# include "virfile.h"
# include "virnetlink.h"
# include "virnetdev.h"
# include "virpidfile.h"
# include "virbitmap.h"
# include "virsocket.h"
VIR_LOG_INIT("util.netdevmacvlan");
/**
* virNetDevMacVLanIsMacvtap:
* @ifname: Name of the interface
*
* Return T if the named netdev exists and is a macvtap device
* F in all other cases.
*/
bool
virNetDevMacVLanIsMacvtap(const char *ifname)
{
int ifindex;
g_autofree char *tapname = NULL;
if (virNetDevGetIndex(ifname, &ifindex) < 0)
return false;
tapname = g_strdup_printf("/dev/tap%d", ifindex);
return virFileExists(tapname);
}
/**
* virNetDevMacVLanCreate:
*
* @ifname: The name the interface is supposed to have; optional parameter
* @macaddress: The MAC address of the device
* @srcdev: The name of the 'link' device
* @macvlan_mode: The macvlan mode to use
* @flags: OR of virNetDevMacVLanCreateFlags.
*
* Create a macvtap device with the given properties.
*
* Returns 0 on success, -1 on fatal error.
*/
int
virNetDevMacVLanCreate(const char *ifname,
const virMacAddr *macaddress,
const char *srcdev,
uint32_t macvlan_mode,
unsigned int flags)
{
int error = 0;
int ifindex = 0;
const char *type = (flags & VIR_NETDEV_MACVLAN_CREATE_WITH_TAP ?
"macvtap" : "macvlan");
virNetlinkNewLinkData data = {
.macvlan_mode = &macvlan_mode,
.mac = macaddress,
};
if (virNetDevGetIndex(srcdev, &ifindex) < 0)
return -1;
data.ifindex = &ifindex;
if (virNetlinkNewLink(ifname, type, &data, &error) < 0) {
char macstr[VIR_MAC_STRING_BUFLEN];
virReportSystemError(-error,
_("error creating %s interface %s@%s (%s)"),
type, ifname, srcdev,
virMacAddrFormat(macaddress, macstr));
return -1;
}
VIR_INFO("created device: '%s'", ifname);
return 0;
}
/**
* virNetDevMacVLanDelete:
*
* @ifname: Name of the interface
*
* Tear down an interface with the given name.
*
* Returns 0 on success, -1 on fatal error.
*/
int virNetDevMacVLanDelete(const char *ifname)
{
VIR_INFO("delete device: '%s'", ifname);
return virNetlinkDelLink(ifname, NULL);
}
/**
* virNetDevMacVLanTapOpen:
* @ifname: Name of the macvtap interface
* @tapfd: array of file descriptor return value for the new macvtap device
* @tapfdSize: number of file descriptors in @tapfd
*
* Open the macvtap's tap device, possibly multiple times if @tapfdSize > 1.
*
* Returns 0 on success, -1 otherwise.
*/
int
virNetDevMacVLanTapOpen(const char *ifname,
int *tapfd,
size_t tapfdSize)
{
int retries = 10;
int ret = -1;
int ifindex;
size_t i = 0;
g_autofree char *tapname = NULL;
if (virNetDevGetIndex(ifname, &ifindex) < 0)
return -1;
tapname = g_strdup_printf("/dev/tap%d", ifindex);
for (i = 0; i < tapfdSize; i++) {
int fd = -1;
while (fd < 0) {
if ((fd = open(tapname, O_RDWR)) >= 0) {
tapfd[i] = fd;
} else if (retries-- > 0) {
/* may need to wait for udev to be done */
g_usleep(20000);
} else {
/* However, if haven't succeeded, quit. */
virReportSystemError(errno,
_("cannot open macvtap tap device %s"),
tapname);
goto cleanup;
}
}
}
ret = 0;
cleanup:
if (ret < 0) {
while (i--)
VIR_FORCE_CLOSE(tapfd[i]);
}
return ret;
}
/**
* virNetDevMacVLanTapSetup:
* @tapfd: array of file descriptors of the macvtap tap
* @tapfdSize: number of file descriptors in @tapfd
* @vnet_hdr: whether to enable or disable IFF_VNET_HDR
*
* Turn on the IFF_VNET_HDR flag if requested and available, but make sure
* it's off otherwise. Similarly, turn on IFF_MULTI_QUEUE if @tapfdSize is
* greater than one, but if it can't be set, consider it a fatal error
* (rather than ignoring as with @vnet_hdr).
*
* A fatal error is defined as the VNET_HDR flag being set but it cannot
* be turned off for some reason. This is reported with -1. Other fatal
* error is not being able to read the interface flags. In that case the
* macvtap device should not be used.
*
* Returns 0 on success, -1 in case of fatal error.
*/
int
virNetDevMacVLanTapSetup(int *tapfd, size_t tapfdSize, bool vnet_hdr)
{
unsigned int features;
struct ifreq ifreq;
short new_flags = 0;
size_t i;
for (i = 0; i < tapfdSize; i++) {
memset(&ifreq, 0, sizeof(ifreq));
if (ioctl(tapfd[i], TUNGETIFF, &ifreq) < 0) {
virReportSystemError(errno, "%s",
_("cannot get interface flags on macvtap tap"));
return -1;
}
new_flags = ifreq.ifr_flags;
if (vnet_hdr) {
if (ioctl(tapfd[i], TUNGETFEATURES, &features) < 0) {
virReportSystemError(errno, "%s",
_("cannot get feature flags on macvtap tap"));
return -1;
}
if (features & IFF_VNET_HDR)
new_flags |= IFF_VNET_HDR;
} else {
new_flags &= ~IFF_VNET_HDR;
}
if (tapfdSize > 1)
new_flags |= IFF_MULTI_QUEUE;
else
new_flags &= ~IFF_MULTI_QUEUE;
if (new_flags != ifreq.ifr_flags) {
ifreq.ifr_flags = new_flags;
if (ioctl(tapfd[i], TUNSETIFF, &ifreq) < 0) {
virReportSystemError(errno, "%s",
_("unable to set vnet or multiqueue flags on macvtap"));
return -1;
}
}
}
return 0;
}
static const uint32_t modeMap[VIR_NETDEV_MACVLAN_MODE_LAST] = {
[VIR_NETDEV_MACVLAN_MODE_VEPA] = MACVLAN_MODE_VEPA,
[VIR_NETDEV_MACVLAN_MODE_PRIVATE] = MACVLAN_MODE_PRIVATE,
[VIR_NETDEV_MACVLAN_MODE_BRIDGE] = MACVLAN_MODE_BRIDGE,
[VIR_NETDEV_MACVLAN_MODE_PASSTHRU] = MACVLAN_MODE_PASSTHRU,
};
/* Struct to hold the state and configuration of a 802.1qbg port */
struct virNetlinkCallbackData {
char *cr_ifname;
virNetDevVPortProfile *virtPortProfile;
virMacAddr macaddress;
char *linkdev;
int vf;
unsigned char vmuuid[VIR_UUID_BUFLEN];
virNetDevVPortProfileOp vmOp;
unsigned int linkState;
};
# define INSTANCE_STRLEN 36
static int instance2str(const unsigned char *p, char *dst, size_t size)
{
if (dst && size > INSTANCE_STRLEN) {
g_snprintf(dst, size, "%02x%02x%02x%02x-%02x%02x-%02x%02x-"
"%02x%02x-%02x%02x%02x%02x%02x%02x",
p[0], p[1], p[2], p[3],
p[4], p[5], p[6], p[7],
p[8], p[9], p[10], p[11], p[12], p[13], p[14], p[15]);
return 0;
}
return -1;
}
# define LLDPAD_PID_FILE "/var/run/lldpad.pid"
# define VIRIP_PID_FILE "/var/run/virip.pid"
/**
* virNetDevMacVLanVPortProfileCallback:
*
* @hdr: The buffer containing the received netlink header + payload
* @length: The length of the received netlink message.
* @peer: The netling sockaddr containing the peer information
* @handled: Contains information if the message has been replied to yet
* @opaque: Contains vital information regarding the associated vm an interface
*
* This function is called when a netlink message is received. The function
* reads the message and responds if it is pertinent to the running VMs
* network interface.
*/
static void
virNetDevMacVLanVPortProfileCallback(struct nlmsghdr *hdr,
unsigned int length,
struct sockaddr_nl *peer,
bool *handled,
void *opaque)
{
struct nla_policy ifla_vf_policy[IFLA_VF_MAX + 1] = {
[IFLA_VF_MAC] = {.minlen = sizeof(struct ifla_vf_mac),
.maxlen = sizeof(struct ifla_vf_mac)},
[IFLA_VF_VLAN] = {.minlen = sizeof(struct ifla_vf_vlan),
.maxlen = sizeof(struct ifla_vf_vlan)},
};
struct nla_policy ifla_port_policy[IFLA_PORT_MAX + 1] = {
[IFLA_PORT_RESPONSE] = {.type = NLA_U16},
};
struct nlattr *tb[IFLA_MAX + 1], *tb3[IFLA_PORT_MAX + 1],
*tb_vfinfo[IFLA_VF_MAX + 1], *tb_vfinfo_list;
struct ifinfomsg ifinfo;
void *data;
int rem;
char *ifname;
bool indicate = false;
struct virNetlinkCallbackData *calld = opaque;
pid_t lldpad_pid = 0;
pid_t virip_pid = 0;
char macaddr[VIR_MAC_STRING_BUFLEN];
data = nlmsg_data(hdr);
/* Quickly decide if we want this or not */
if (virPidFileReadPath(LLDPAD_PID_FILE, &lldpad_pid) < 0)
return;
ignore_value(virPidFileReadPath(VIRIP_PID_FILE, &virip_pid));
if (hdr->nlmsg_pid != lldpad_pid && hdr->nlmsg_pid != virip_pid)
return; /* we only care for lldpad and virip messages */
if (hdr->nlmsg_type != RTM_SETLINK)
return; /* we only care for RTM_SETLINK */
if (*handled)
return; /* if it has been handled - dont handle again */
/* DEBUG start */
VIR_INFO("netlink message nl_sockaddr: %p len: %d", peer, length);
VIR_DEBUG("nlmsg_type = 0x%02x", hdr->nlmsg_type);
VIR_DEBUG("nlmsg_len = 0x%04x", hdr->nlmsg_len);
VIR_DEBUG("nlmsg_pid = %d", hdr->nlmsg_pid);
VIR_DEBUG("nlmsg_seq = 0x%08x", hdr->nlmsg_seq);
VIR_DEBUG("nlmsg_flags = 0x%04x", hdr->nlmsg_flags);
VIR_DEBUG("lldpad pid = %d", lldpad_pid);
switch (hdr->nlmsg_type) {
case RTM_NEWLINK:
case RTM_DELLINK:
case RTM_SETLINK:
case RTM_GETLINK:
VIR_DEBUG(" IFINFOMSG");
VIR_DEBUG(" ifi_family = 0x%02x",
((struct ifinfomsg *)data)->ifi_family);
VIR_DEBUG(" ifi_type = 0x%x",
((struct ifinfomsg *)data)->ifi_type);
VIR_DEBUG(" ifi_index = %i",
((struct ifinfomsg *)data)->ifi_index);
VIR_DEBUG(" ifi_flags = 0x%04x",
((struct ifinfomsg *)data)->ifi_flags);
VIR_DEBUG(" ifi_change = 0x%04x",
((struct ifinfomsg *)data)->ifi_change);
}
/* DEBUG end */
/* Parse netlink message assume a setlink with vfports */
memcpy(&ifinfo, NLMSG_DATA(hdr), sizeof(ifinfo));
VIR_DEBUG("family:%#x type:%#x index:%d flags:%#x change:%#x",
ifinfo.ifi_family, ifinfo.ifi_type, ifinfo.ifi_index,
ifinfo.ifi_flags, ifinfo.ifi_change);
if (nlmsg_parse(hdr, sizeof(ifinfo),
(struct nlattr **)&tb, IFLA_MAX, NULL)) {
VIR_DEBUG("error parsing request...");
return;
}
if (tb[IFLA_VFINFO_LIST]) {
VIR_DEBUG("FOUND IFLA_VFINFO_LIST!");
nla_for_each_nested(tb_vfinfo_list, tb[IFLA_VFINFO_LIST], rem) {
if (nla_type(tb_vfinfo_list) != IFLA_VF_INFO) {
VIR_DEBUG("nested parsing of"
"IFLA_VFINFO_LIST failed.");
return;
}
if (nla_parse_nested(tb_vfinfo, IFLA_VF_MAX,
tb_vfinfo_list, ifla_vf_policy)) {
VIR_DEBUG("nested parsing of "
"IFLA_VF_INFO failed.");
return;
}
}
if (tb_vfinfo[IFLA_VF_MAC]) {
struct ifla_vf_mac *mac = RTA_DATA(tb_vfinfo[IFLA_VF_MAC]);
unsigned char *m = mac->mac;
VIR_DEBUG("IFLA_VF_MAC = %2x:%2x:%2x:%2x:%2x:%2x",
m[0], m[1], m[2], m[3], m[4], m[5]);
if (virMacAddrCmpRaw(&calld->macaddress, mac->mac)) {
/* Repeat the same check for a broadcast mac */
size_t i;
for (i = 0; i < VIR_MAC_BUFLEN; i++) {
if (calld->macaddress.addr[i] != 0xff) {
VIR_DEBUG("MAC address match failed (wasn't broadcast)");
return;
}
}
}
}
if (tb_vfinfo[IFLA_VF_VLAN]) {
struct ifla_vf_vlan *vlan = RTA_DATA(tb_vfinfo[IFLA_VF_VLAN]);
VIR_DEBUG("IFLA_VF_VLAN = %d", vlan->vlan);
}
}
if (tb[IFLA_IFNAME]) {
ifname = (char *)RTA_DATA(tb[IFLA_IFNAME]);
VIR_DEBUG("IFLA_IFNAME = %s", ifname);
}
if (tb[IFLA_OPERSTATE]) {
rem = *(unsigned short *)RTA_DATA(tb[IFLA_OPERSTATE]);
VIR_DEBUG("IFLA_OPERSTATE = %d", rem);
}
if (tb[IFLA_VF_PORTS]) {
struct nlattr *tb_vf_ports;
VIR_DEBUG("found IFLA_VF_PORTS");
nla_for_each_nested(tb_vf_ports, tb[IFLA_VF_PORTS], rem) {
VIR_DEBUG("iterating");
if (nla_type(tb_vf_ports) != IFLA_VF_PORT) {
VIR_DEBUG("not a IFLA_VF_PORT. skipping");
continue;
}
if (nla_parse_nested(tb3, IFLA_PORT_MAX, tb_vf_ports,
ifla_port_policy)) {
VIR_DEBUG("nested parsing on level 2"
" failed.");
}
if (tb3[IFLA_PORT_VF]) {
VIR_DEBUG("IFLA_PORT_VF = %d",
*(uint32_t *) (RTA_DATA(tb3[IFLA_PORT_VF])));
}
if (tb3[IFLA_PORT_PROFILE]) {
VIR_DEBUG("IFLA_PORT_PROFILE = %s",
(char *) RTA_DATA(tb3[IFLA_PORT_PROFILE]));
}
if (tb3[IFLA_PORT_VSI_TYPE]) {
struct ifla_port_vsi *pvsi;
int tid = 0;
pvsi = (struct ifla_port_vsi *)
RTA_DATA(tb3[IFLA_PORT_VSI_TYPE]);
tid = ((pvsi->vsi_type_id[2] << 16) |
(pvsi->vsi_type_id[1] << 8) |
pvsi->vsi_type_id[0]);
VIR_DEBUG("mgr_id: %d", pvsi->vsi_mgr_id);
VIR_DEBUG("type_id: %d", tid);
VIR_DEBUG("type_version: %d",
pvsi->vsi_type_version);
}
if (tb3[IFLA_PORT_INSTANCE_UUID]) {
char instance[INSTANCE_STRLEN + 2];
unsigned char *uuid;
uuid = (unsigned char *)
RTA_DATA(tb3[IFLA_PORT_INSTANCE_UUID]);
instance2str(uuid, instance, sizeof(instance));
VIR_DEBUG("IFLA_PORT_INSTANCE_UUID = %s",
instance);
}
if (tb3[IFLA_PORT_REQUEST]) {
uint8_t req = *(uint8_t *) RTA_DATA(tb3[IFLA_PORT_REQUEST]);
VIR_DEBUG("IFLA_PORT_REQUEST = %d", req);
if (req == PORT_REQUEST_DISASSOCIATE) {
VIR_DEBUG("Set disassociated.");
indicate = true;
}
}
if (tb3[IFLA_PORT_RESPONSE]) {
VIR_DEBUG("IFLA_PORT_RESPONSE = %d",
*(uint16_t *) RTA_DATA(tb3[IFLA_PORT_RESPONSE]));
}
}
}
if (!indicate)
return;
VIR_INFO("Re-send 802.1qbg associate request:");
VIR_INFO(" if: %s", calld->cr_ifname);
VIR_INFO(" lf: %s", calld->linkdev);
VIR_INFO(" mac: %s", virMacAddrFormat(&calld->macaddress, macaddr));
ignore_value(virNetDevVPortProfileAssociate(calld->cr_ifname,
calld->virtPortProfile,
&calld->macaddress,
calld->linkdev,
calld->vf,
calld->vmuuid,
calld->vmOp, true));
*handled = true;
return;
}
/**
* virNetlinkCallbackDataFree
*
* @calld: pointer to a virNetlinkCallbackData object to free
*
* This function frees all the data associated with a virNetlinkCallbackData object
* as well as the object itself. If called with NULL, it does nothing.
*
* Returns nothing.
*/
static void
virNetlinkCallbackDataFree(struct virNetlinkCallbackData *calld)
{
if (calld) {
g_free(calld->cr_ifname);
g_free(calld->virtPortProfile);
g_free(calld->linkdev);
}
g_free(calld);
}
/**
* virNetDevMacVLanVPortProfileDestroyCallback:
*
* @watch: watch whose handle to remove
* @macaddr: macaddr whose handle to remove
* @opaque: Contains vital information regarding the associated vm
*
* This function is called when a netlink message handler is terminated.
* The function frees locally allocated data referenced in the opaque
* data, and the opaque object itself.
*/
static void
virNetDevMacVLanVPortProfileDestroyCallback(int watch G_GNUC_UNUSED,
const virMacAddr *macaddr G_GNUC_UNUSED,
void *opaque)
{
virNetlinkCallbackDataFree((struct virNetlinkCallbackData *)opaque);
}
int
virNetDevMacVLanVPortProfileRegisterCallback(const char *ifname,
const virMacAddr *macaddress,
const char *linkdev,
const unsigned char *vmuuid,
const virNetDevVPortProfile *virtPortProfile,
virNetDevVPortProfileOp vmOp)
{
struct virNetlinkCallbackData *calld = NULL;
if (virtPortProfile && virNetlinkEventServiceIsRunning(NETLINK_ROUTE)) {
calld = g_new0(struct virNetlinkCallbackData, 1);
calld->cr_ifname = g_strdup(ifname);
calld->virtPortProfile = g_new0(virNetDevVPortProfile, 1);
memcpy(calld->virtPortProfile, virtPortProfile, sizeof(*virtPortProfile));
virMacAddrSet(&calld->macaddress, macaddress);
calld->linkdev = g_strdup(linkdev);
memcpy(calld->vmuuid, vmuuid, sizeof(calld->vmuuid));
calld->vmOp = vmOp;
if (virNetlinkEventAddClient(virNetDevMacVLanVPortProfileCallback,
virNetDevMacVLanVPortProfileDestroyCallback,
calld, macaddress, NETLINK_ROUTE) < 0)
goto error;
}
return 0;
error:
virNetlinkCallbackDataFree(calld);
return -1;
}
/**
* virNetDevMacVLanCreateWithVPortProfile:
* Create an instance of a macvtap device and open its tap character
* device.
* @ifnameRequested: Interface name that the caller wants the macvtap
* device to have, or NULL to pick the first available name
* appropriate for the type (macvlan%d or macvtap%d). If the
* suggested name fits one of those patterns, but is already in
* use, we will fallback to finding the first available. If the
* suggested name *doesn't* fit a pattern and the name is in use,
* we will fail.
* @macaddress: The MAC address for the macvtap device
* @linkdev: The interface name of the NIC to connect to the external bridge
* @mode: macvtap mode (VIR_NETDEV_MACVLAN_MODE_(BRIDGE|VEPA|PRIVATE|PASSTHRU)
* @vmuuid: The UUID of the VM the macvtap belongs to
* @virtPortProfile: pointer to object holding the virtual port profile data
* @ifnameResult: Pointer to a string pointer where the actual name of the
* interface will be stored into if everything succeeded. It is up
* to the caller to free the string.
* @tapfd: array of file descriptor return value for the new tap device
* @tapfdSize: number of file descriptors in @tapfd
* @flags: OR of virNetDevMacVLanCreateFlags.
*
* Creates a macvlan device. Optionally, if flags &
* VIR_NETDEV_MACVLAN_CREATE_WITH_TAP is set, @tapfd is populated with FDs of
* tap devices up to @tapfdSize.
*
* Return 0 on success, -1 on error.
*/
int
virNetDevMacVLanCreateWithVPortProfile(const char *ifnameRequested,
const virMacAddr *macaddress,
const char *linkdev,
virNetDevMacVLanMode mode,
const virNetDevVlan *vlan,
const unsigned char *vmuuid,
const virNetDevVPortProfile *virtPortProfile,
char **ifnameResult,
virNetDevVPortProfileOp vmOp,
char *stateDir,
int *tapfd,
size_t tapfdSize,
unsigned int flags)
{
g_autofree char *ifname = NULL;
uint32_t macvtapMode;
int vf = -1;
bool vnet_hdr = flags & VIR_NETDEV_MACVLAN_VNET_HDR;
virNetDevGenNameType type;
macvtapMode = modeMap[mode];
*ifnameResult = NULL;
/** Note: When using PASSTHROUGH mode with MACVTAP devices the link
* device's MAC address must be set to the VMs MAC address. In
* order to not confuse the first switch or bridge in line this MAC
* address must be reset when the VM is shut down.
* This is especially important when using SRIOV capable cards that
* emulate their switch in firmware.
*/
if (mode == VIR_NETDEV_MACVLAN_MODE_PASSTHRU) {
bool setVlan = true;
if (virtPortProfile &&
virtPortProfile->virtPortType == VIR_NETDEV_VPORT_PROFILE_8021QBH) {
/* The Cisco enic driver (the only SRIOV-capable card that
* uses 802.1Qbh) doesn't support IFLA_VFINFO_LIST, which
* is required to get/set the vlan tag of a VF.
*/
setVlan = false;
}
if (virNetDevSaveNetConfig(linkdev, -1, stateDir, setVlan) < 0)
return -1;
if (virNetDevSetNetConfig(linkdev, -1, NULL, vlan, macaddress, setVlan) < 0)
return -1;
}
if (ifnameRequested) {
VIR_INFO("Requested macvtap device name: %s", ifnameRequested);
ifname = g_strdup(ifnameRequested);
}
if (flags & VIR_NETDEV_MACVLAN_CREATE_WITH_TAP)
type = VIR_NET_DEV_GEN_NAME_MACVTAP;
else
type = VIR_NET_DEV_GEN_NAME_MACVLAN;
if (virNetDevGenerateName(&ifname, type) < 0 ||
virNetDevMacVLanCreate(ifname, macaddress,
linkdev, macvtapMode, flags) < 0) {
return -1;
}
if (virNetDevVPortProfileAssociate(ifname,
virtPortProfile,
macaddress,
linkdev,
vf,
vmuuid, vmOp, false) < 0) {
goto link_del_exit;
}
if (flags & VIR_NETDEV_MACVLAN_CREATE_IFUP) {
if (virNetDevSetOnline(ifname, true) < 0)
goto disassociate_exit;
}
if (flags & VIR_NETDEV_MACVLAN_CREATE_WITH_TAP) {
if (virNetDevMacVLanTapOpen(ifname, tapfd, tapfdSize) < 0)
goto disassociate_exit;
if (virNetDevMacVLanTapSetup(tapfd, tapfdSize, vnet_hdr) < 0)
goto disassociate_exit;
}
if (vmOp == VIR_NETDEV_VPORT_PROFILE_OP_CREATE ||
vmOp == VIR_NETDEV_VPORT_PROFILE_OP_RESTORE) {
/* Only directly register upon a create or restore (restarting
* a saved image) - migration and libvirtd restart are handled
* elsewhere.
*/
if (virNetDevMacVLanVPortProfileRegisterCallback(ifname, macaddress,
linkdev, vmuuid,
virtPortProfile,
vmOp) < 0)
goto disassociate_exit;
}
*ifnameResult = g_steal_pointer(&ifname);
return 0;
disassociate_exit:
ignore_value(virNetDevVPortProfileDisassociate(ifname,
virtPortProfile,
macaddress,
linkdev,
vf,
vmOp));
while (tapfdSize--)
VIR_FORCE_CLOSE(tapfd[tapfdSize]);
link_del_exit:
ignore_value(virNetDevMacVLanDelete(ifname));
return -1;
}
/**
* virNetDevMacVLanDeleteWithVPortProfile:
* @ifname : The name of the macvtap interface
* @linkdev: The interface name of the NIC to connect to the external bridge
* @virtPortProfile: pointer to object holding the virtual port profile data
*
* Delete an interface given its name. Disassociate
* it with the switch if port profile parameters
* were provided.
*/
int virNetDevMacVLanDeleteWithVPortProfile(const char *ifname,
const virMacAddr *macaddr,
const char *linkdev,
int mode,
const virNetDevVPortProfile *virtPortProfile,
char *stateDir)
{
int ret = 0;
if (ifname) {
if (virNetDevVPortProfileDisassociate(ifname,
virtPortProfile,
macaddr,
linkdev,
-1,
VIR_NETDEV_VPORT_PROFILE_OP_DESTROY) < 0)
ret = -1;
if (virNetDevMacVLanDelete(ifname) < 0)
ret = -1;
}
if (mode == VIR_NETDEV_MACVLAN_MODE_PASSTHRU) {
g_autoptr(virMacAddr) MAC = NULL;
g_autoptr(virMacAddr) adminMAC = NULL;
g_autoptr(virNetDevVlan) vlan = NULL;
if ((virNetDevReadNetConfig(linkdev, -1, stateDir,
&adminMAC, &vlan, &MAC) == 0) &&
(adminMAC || vlan || MAC)) {
ignore_value(virNetDevSetNetConfig(linkdev, -1,
adminMAC, vlan, MAC, !!vlan));
}
}
virNetlinkEventRemoveClient(0, macaddr, NETLINK_ROUTE);
return ret;
}
/**
* virNetDevMacVLanRestartWithVPortProfile:
* Register a port profile callback handler for a VM that
* is already running
* .
* @cr_ifname: Interface name that the macvtap has.
* @macaddress: The MAC address for the macvtap device
* @linkdev: The interface name of the NIC to connect to the external bridge
* @vmuuid: The UUID of the VM the macvtap belongs to
* @virtPortProfile: pointer to object holding the virtual port profile data
* @vmOp: Operation to use during setup of the association
*
* Returns 0; returns -1 on error.
*/
int virNetDevMacVLanRestartWithVPortProfile(const char *cr_ifname,
const virMacAddr *macaddress,
const char *linkdev,
const unsigned char *vmuuid,
const virNetDevVPortProfile *virtPortProfile,
virNetDevVPortProfileOp vmOp)
{
int rc = 0;
rc = virNetDevMacVLanVPortProfileRegisterCallback(cr_ifname, macaddress,
linkdev, vmuuid,
virtPortProfile, vmOp);
if (rc < 0)
return rc;
ignore_value(virNetDevVPortProfileAssociate(cr_ifname,
virtPortProfile,
macaddress,
linkdev,
-1,
vmuuid,
vmOp, true));
return rc;
}
#else /* ! WITH_LIBNL */
bool virNetDevMacVLanIsMacvtap(const char *ifname G_GNUC_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Cannot create macvlan devices on this platform"));
return false;
}
int virNetDevMacVLanCreate(const char *ifname G_GNUC_UNUSED,
const virMacAddr *macaddress G_GNUC_UNUSED,
const char *srcdev G_GNUC_UNUSED,
uint32_t macvlan_mode G_GNUC_UNUSED,
unsigned int fflags G_GNUC_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Cannot create macvlan devices on this platform"));
return -1;
}
int virNetDevMacVLanDelete(const char *ifname G_GNUC_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Cannot create macvlan devices on this platform"));
return -1;
}
int
virNetDevMacVLanTapOpen(const char *ifname G_GNUC_UNUSED,
int *tapfd G_GNUC_UNUSED,
size_t tapfdSize G_GNUC_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Cannot create macvlan devices on this platform"));
return -1;
}
int
virNetDevMacVLanTapSetup(int *tapfd G_GNUC_UNUSED,
size_t tapfdSize G_GNUC_UNUSED,
bool vnet_hdr G_GNUC_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Cannot create macvlan devices on this platform"));
return -1;
}
int virNetDevMacVLanCreateWithVPortProfile(const char *ifname G_GNUC_UNUSED,
const virMacAddr *macaddress G_GNUC_UNUSED,
const char *linkdev G_GNUC_UNUSED,
virNetDevMacVLanMode mode G_GNUC_UNUSED,
const virNetDevVlan *vlan G_GNUC_UNUSED,
const unsigned char *vmuuid G_GNUC_UNUSED,
const virNetDevVPortProfile *virtPortProfile G_GNUC_UNUSED,
char **res_ifname G_GNUC_UNUSED,
virNetDevVPortProfileOp vmop G_GNUC_UNUSED,
char *stateDir G_GNUC_UNUSED,
int *tapfd G_GNUC_UNUSED,
size_t tapfdSize G_GNUC_UNUSED,
unsigned int unused_flags G_GNUC_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Cannot create macvlan devices on this platform"));
return -1;
}
int virNetDevMacVLanDeleteWithVPortProfile(const char *ifname G_GNUC_UNUSED,
const virMacAddr *macaddress G_GNUC_UNUSED,
const char *linkdev G_GNUC_UNUSED,
int mode G_GNUC_UNUSED,
const virNetDevVPortProfile *virtPortProfile G_GNUC_UNUSED,
char *stateDir G_GNUC_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Cannot create macvlan devices on this platform"));
return -1;
}
int virNetDevMacVLanRestartWithVPortProfile(const char *cr_ifname G_GNUC_UNUSED,
const virMacAddr *macaddress G_GNUC_UNUSED,
const char *linkdev G_GNUC_UNUSED,
const unsigned char *vmuuid G_GNUC_UNUSED,
const virNetDevVPortProfile *virtPortProfile G_GNUC_UNUSED,
virNetDevVPortProfileOp vmOp G_GNUC_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Cannot create macvlan devices on this platform"));
return -1;
}
int virNetDevMacVLanVPortProfileRegisterCallback(const char *ifname G_GNUC_UNUSED,
const virMacAddr *macaddress G_GNUC_UNUSED,
const char *linkdev G_GNUC_UNUSED,
const unsigned char *vmuuid G_GNUC_UNUSED,
const virNetDevVPortProfile *virtPortProfile G_GNUC_UNUSED,
virNetDevVPortProfileOp vmOp G_GNUC_UNUSED)
{
virReportSystemError(ENOSYS, "%s",
_("Cannot create macvlan devices on this platform"));
return -1;
}
#endif /* ! WITH_LIBNL */
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