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libvirt/src/util/virhostdev.c
Cédric Bosdonnat ea46e00f12 Add virHostdevFindUSBDevice to private symbols 
Finding an USB device from the vendor/device values will be needed
by libxl driver to convert from vendor/device to bus/dev addresses.

Signed-off-by: Jim Fehlig <jfehlig@suse.com>
2016-09-02 17:38:09 +02:00

1784 lines
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/* virhostdev.c: hostdev management
*
* Copyright (C) 2006-2007, 2009-2016 Red Hat, Inc.
* Copyright (C) 2006 Daniel P. Berrange
* Copyright (C) 2014 SUSE LINUX Products GmbH, Nuernberg, Germany.
*
* 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/>.
*
* Author: Daniel P. Berrange <berrange@redhat.com>
* Author: Chunyan Liu <cyliu@suse.com>
*/
#include <config.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include "virhostdev.h"
#include "viralloc.h"
#include "virstring.h"
#include "virfile.h"
#include "virerror.h"
#include "virlog.h"
#include "virutil.h"
#include "virnetdev.h"
#include "configmake.h"
#define VIR_FROM_THIS VIR_FROM_NONE
VIR_LOG_INIT("util.hostdev");
#define HOSTDEV_STATE_DIR LOCALSTATEDIR "/run/libvirt/hostdevmgr"
static virHostdevManagerPtr manager; /* global hostdev manager, never freed */
static virClassPtr virHostdevManagerClass;
static void virHostdevManagerDispose(void *obj);
static virHostdevManagerPtr virHostdevManagerNew(void);
struct virHostdevIsPCINodeDeviceUsedData {
virHostdevManagerPtr mgr;
const char *domainName;
const bool usesVFIO;
};
/* This module makes heavy use of bookkeeping lists contained inside a
* virHostdevManager instance to keep track of the devices' status. To make
* it easy to spot potential ownership errors when moving devices from one
* list to the other, variable names should comply with the following
* conventions when it comes to virPCIDevice and virPCIDeviceList instances:
*
* pci - a short-lived virPCIDevice whose purpose is usually just to look
* up the actual PCI device in one of the bookkeeping lists; basically
* little more than a fancy virPCIDeviceAddress
*
* pcidevs - a list containing a bunch of the above
*
* actual - a virPCIDevice instance that has either been retrieved from one
* of the bookkeeping lists, or is intended to be added or copied
* to one at some point
*
* Passing an 'actual' to a function that requires a 'pci' is fine, but the
* opposite is usually not true; as a rule of thumb, functions in the virpci
* module usually expect an 'actual'. Even with these conventions in place,
* adding comments to highlight ownership-related issues is recommended */
static int virHostdevIsPCINodeDeviceUsed(virPCIDeviceAddressPtr devAddr, void *opaque)
{
virPCIDevicePtr actual;
int ret = -1;
struct virHostdevIsPCINodeDeviceUsedData *helperData = opaque;
actual = virPCIDeviceListFindByIDs(helperData->mgr->activePCIHostdevs,
devAddr->domain, devAddr->bus,
devAddr->slot, devAddr->function);
if (actual) {
const char *actual_drvname = NULL;
const char *actual_domname = NULL;
virPCIDeviceGetUsedBy(actual, &actual_drvname, &actual_domname);
if (helperData->usesVFIO &&
(actual_domname && helperData->domainName) &&
(STREQ(actual_domname, helperData->domainName)))
goto iommu_owner;
if (actual_drvname && actual_domname)
virReportError(VIR_ERR_OPERATION_INVALID,
_("PCI device %s is in use by "
"driver %s, domain %s"),
virPCIDeviceGetName(actual),
actual_drvname, actual_domname);
else
virReportError(VIR_ERR_OPERATION_INVALID,
_("PCI device %s is in use"),
virPCIDeviceGetName(actual));
goto cleanup;
}
iommu_owner:
ret = 0;
cleanup:
return ret;
}
static int virHostdevManagerOnceInit(void)
{
if (!(virHostdevManagerClass = virClassNew(virClassForObject(),
"virHostdevManager",
sizeof(virHostdevManager),
virHostdevManagerDispose)))
return -1;
if (!(manager = virHostdevManagerNew()))
return -1;
return 0;
}
VIR_ONCE_GLOBAL_INIT(virHostdevManager)
static void
virHostdevManagerDispose(void *obj)
{
virHostdevManagerPtr hostdevMgr = obj;
if (!hostdevMgr)
return;
virObjectUnref(hostdevMgr->activePCIHostdevs);
virObjectUnref(hostdevMgr->inactivePCIHostdevs);
virObjectUnref(hostdevMgr->activeUSBHostdevs);
virObjectUnref(hostdevMgr->activeSCSIHostdevs);
VIR_FREE(hostdevMgr->stateDir);
}
static virHostdevManagerPtr
virHostdevManagerNew(void)
{
virHostdevManagerPtr hostdevMgr;
bool privileged = geteuid() == 0;
if (!(hostdevMgr = virObjectNew(virHostdevManagerClass)))
return NULL;
if (!(hostdevMgr->activePCIHostdevs = virPCIDeviceListNew()))
goto error;
if (!(hostdevMgr->activeUSBHostdevs = virUSBDeviceListNew()))
goto error;
if (!(hostdevMgr->inactivePCIHostdevs = virPCIDeviceListNew()))
goto error;
if (!(hostdevMgr->activeSCSIHostdevs = virSCSIDeviceListNew()))
goto error;
if (privileged) {
if (VIR_STRDUP(hostdevMgr->stateDir, HOSTDEV_STATE_DIR) < 0)
goto error;
if (virFileMakePath(hostdevMgr->stateDir) < 0) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("Failed to create state dir '%s'"),
hostdevMgr->stateDir);
goto error;
}
} else {
char *rundir = NULL;
mode_t old_umask;
if (!(rundir = virGetUserRuntimeDirectory()))
goto error;
if (virAsprintf(&hostdevMgr->stateDir, "%s/hostdevmgr", rundir) < 0) {
VIR_FREE(rundir);
goto error;
}
VIR_FREE(rundir);
old_umask = umask(077);
if (virFileMakePath(hostdevMgr->stateDir) < 0) {
umask(old_umask);
virReportError(VIR_ERR_OPERATION_FAILED,
_("Failed to create state dir '%s'"),
hostdevMgr->stateDir);
goto error;
}
umask(old_umask);
}
return hostdevMgr;
error:
virObjectUnref(hostdevMgr);
return NULL;
}
virHostdevManagerPtr
virHostdevManagerGetDefault(void)
{
if (virHostdevManagerInitialize() < 0)
return NULL;
return virObjectRef(manager);
}
static virPCIDeviceListPtr
virHostdevGetPCIHostDeviceList(virDomainHostdevDefPtr *hostdevs, int nhostdevs)
{
virPCIDeviceListPtr pcidevs;
size_t i;
if (!(pcidevs = virPCIDeviceListNew()))
return NULL;
for (i = 0; i < nhostdevs; i++) {
virDomainHostdevDefPtr hostdev = hostdevs[i];
virDomainHostdevSubsysPCIPtr pcisrc = &hostdev->source.subsys.u.pci;
virPCIDevicePtr pci;
if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS)
continue;
if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI)
continue;
pci = virPCIDeviceNew(pcisrc->addr.domain, pcisrc->addr.bus,
pcisrc->addr.slot, pcisrc->addr.function);
if (!pci) {
virObjectUnref(pcidevs);
return NULL;
}
if (virPCIDeviceListAdd(pcidevs, pci) < 0) {
virPCIDeviceFree(pci);
virObjectUnref(pcidevs);
return NULL;
}
virPCIDeviceSetManaged(pci, hostdev->managed);
if (pcisrc->backend == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_VFIO)
virPCIDeviceSetStubDriver(pci, VIR_PCI_STUB_DRIVER_VFIO);
else if (pcisrc->backend == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_XEN)
virPCIDeviceSetStubDriver(pci, VIR_PCI_STUB_DRIVER_XEN);
else
virPCIDeviceSetStubDriver(pci, VIR_PCI_STUB_DRIVER_KVM);
}
return pcidevs;
}
static int
virHostdevPCISysfsPath(virDomainHostdevDefPtr hostdev,
char **sysfs_path)
{
virPCIDeviceAddress config_address;
config_address.domain = hostdev->source.subsys.u.pci.addr.domain;
config_address.bus = hostdev->source.subsys.u.pci.addr.bus;
config_address.slot = hostdev->source.subsys.u.pci.addr.slot;
config_address.function = hostdev->source.subsys.u.pci.addr.function;
return virPCIDeviceAddressGetSysfsFile(&config_address, sysfs_path);
}
static int
virHostdevIsVirtualFunction(virDomainHostdevDefPtr hostdev)
{
char *sysfs_path = NULL;
int ret = -1;
if (virHostdevPCISysfsPath(hostdev, &sysfs_path) < 0)
return ret;
ret = virPCIIsVirtualFunction(sysfs_path);
VIR_FREE(sysfs_path);
return ret;
}
static int
virHostdevNetDevice(virDomainHostdevDefPtr hostdev, char **linkdev,
int *vf)
{
int ret = -1;
char *sysfs_path = NULL;
if (virHostdevPCISysfsPath(hostdev, &sysfs_path) < 0)
return ret;
if (virPCIIsVirtualFunction(sysfs_path) == 1) {
if (virPCIGetVirtualFunctionInfo(sysfs_path, linkdev,
vf) < 0)
goto cleanup;
} else {
if (virPCIGetNetName(sysfs_path, linkdev) < 0)
goto cleanup;
*vf = -1;
}
ret = 0;
cleanup:
VIR_FREE(sysfs_path);
return ret;
}
static bool
virHostdevIsPCINetDevice(virDomainHostdevDefPtr hostdev)
{
return hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_SUBSYS &&
hostdev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI &&
hostdev->parent.type == VIR_DOMAIN_DEVICE_NET &&
hostdev->parent.data.net;
}
static int
virHostdevNetConfigVirtPortProfile(const char *linkdev, int vf,
virNetDevVPortProfilePtr virtPort,
const virMacAddr *macaddr,
const unsigned char *uuid,
bool associate)
{
int ret = -1;
if (!virtPort)
return ret;
switch (virtPort->virtPortType) {
case VIR_NETDEV_VPORT_PROFILE_NONE:
case VIR_NETDEV_VPORT_PROFILE_OPENVSWITCH:
case VIR_NETDEV_VPORT_PROFILE_8021QBG:
case VIR_NETDEV_VPORT_PROFILE_LAST:
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("virtualport type %s is "
"currently not supported on interfaces of type "
"hostdev"),
virNetDevVPortTypeToString(virtPort->virtPortType));
break;
case VIR_NETDEV_VPORT_PROFILE_8021QBH:
if (associate)
ret = virNetDevVPortProfileAssociate(NULL, virtPort, macaddr,
linkdev, vf, uuid,
VIR_NETDEV_VPORT_PROFILE_OP_CREATE, false);
else
ret = virNetDevVPortProfileDisassociate(NULL, virtPort,
macaddr, linkdev, vf,
VIR_NETDEV_VPORT_PROFILE_OP_DESTROY);
break;
}
return ret;
}
static int
virHostdevNetConfigReplace(virDomainHostdevDefPtr hostdev,
const unsigned char *uuid,
const char *stateDir)
{
char *linkdev = NULL;
virNetDevVlanPtr vlan;
virNetDevVPortProfilePtr virtPort;
int ret = -1;
int vf = -1;
bool port_profile_associate = true;
if (virHostdevIsVirtualFunction(hostdev) != 1) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Interface type hostdev is currently supported on"
" SR-IOV Virtual Functions only"));
return ret;
}
if (virHostdevNetDevice(hostdev, &linkdev, &vf) < 0)
return ret;
vlan = virDomainNetGetActualVlan(hostdev->parent.data.net);
virtPort = virDomainNetGetActualVirtPortProfile(
hostdev->parent.data.net);
if (virtPort) {
if (vlan) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
_("direct setting of the vlan tag is not allowed "
"for hostdev devices using %s mode"),
virNetDevVPortTypeToString(virtPort->virtPortType));
goto cleanup;
}
ret = virHostdevNetConfigVirtPortProfile(linkdev, vf,
virtPort, &hostdev->parent.data.net->mac, uuid,
port_profile_associate);
} else {
/* Set only mac and vlan */
ret = virNetDevReplaceNetConfig(linkdev, vf,
&hostdev->parent.data.net->mac,
vlan, stateDir);
}
cleanup:
VIR_FREE(linkdev);
return ret;
}
/* @oldStateDir:
* For upgrade purpose:
* To an existing VM on QEMU, the hostdev netconfig file is originally stored
* in cfg->stateDir (/var/run/libvirt/qemu). Switch to new version, it uses new
* location (mgr->stateDir) but certainly will not find it. In this
* case, try to find in the old state dir.
*/
static int
virHostdevNetConfigRestore(virDomainHostdevDefPtr hostdev,
const char *stateDir,
const char *oldStateDir)
{
char *linkdev = NULL;
virNetDevVPortProfilePtr virtPort;
int ret = -1;
int vf = -1;
bool port_profile_associate = false;
/* This is only needed for PCI devices that have been defined
* using <interface type='hostdev'>. For all others, it is a NOP.
*/
if (!virHostdevIsPCINetDevice(hostdev))
return 0;
if (virHostdevIsVirtualFunction(hostdev) != 1) {
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("Interface type hostdev is currently supported on"
" SR-IOV Virtual Functions only"));
return ret;
}
if (virHostdevNetDevice(hostdev, &linkdev, &vf) < 0)
return ret;
virtPort = virDomainNetGetActualVirtPortProfile(
hostdev->parent.data.net);
if (virtPort) {
ret = virHostdevNetConfigVirtPortProfile(linkdev, vf, virtPort,
&hostdev->parent.data.net->mac,
NULL,
port_profile_associate);
} else {
ret = virNetDevRestoreNetConfig(linkdev, vf, stateDir);
if (ret < 0 && oldStateDir != NULL)
ret = virNetDevRestoreNetConfig(linkdev, vf, oldStateDir);
}
VIR_FREE(linkdev);
return ret;
}
int
virHostdevPreparePCIDevices(virHostdevManagerPtr mgr,
const char *drv_name,
const char *dom_name,
const unsigned char *uuid,
virDomainHostdevDefPtr *hostdevs,
int nhostdevs,
unsigned int flags)
{
virPCIDeviceListPtr pcidevs = NULL;
int last_processed_hostdev_vf = -1;
size_t i;
int ret = -1;
virPCIDeviceAddressPtr devAddr = NULL;
if (!nhostdevs)
return 0;
virObjectLock(mgr->activePCIHostdevs);
virObjectLock(mgr->inactivePCIHostdevs);
if (!(pcidevs = virHostdevGetPCIHostDeviceList(hostdevs, nhostdevs)))
goto cleanup;
/* Detaching devices from the host involves several steps; each
* of them is described at length below.
*
* All devices must be detached before we reset any of them,
* because in some cases you have to reset the whole PCI, which
* impacts all devices on it. Also, all devices must be reset
* before being marked as active */
/* Step 1: Perform some initial checks on the devices */
for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) {
virPCIDevicePtr pci = virPCIDeviceListGet(pcidevs, i);
bool strict_acs_check = !!(flags & VIR_HOSTDEV_STRICT_ACS_CHECK);
bool usesVFIO = (virPCIDeviceGetStubDriver(pci) == VIR_PCI_STUB_DRIVER_VFIO);
struct virHostdevIsPCINodeDeviceUsedData data = { mgr, dom_name, usesVFIO };
if (!usesVFIO && !virPCIDeviceIsAssignable(pci, strict_acs_check)) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("PCI device %s is not assignable"),
virPCIDeviceGetName(pci));
goto cleanup;
}
/* The device is in use by other active domain if
* the dev is in list activePCIHostdevs. VFIO devices
* belonging to same iommu group can't be shared
* across guests.
*/
devAddr = virPCIDeviceGetAddress(pci);
if (usesVFIO) {
if (virPCIDeviceAddressIOMMUGroupIterate(devAddr,
virHostdevIsPCINodeDeviceUsed,
&data) < 0)
goto cleanup;
} else if (virHostdevIsPCINodeDeviceUsed(devAddr, &data)) {
goto cleanup;
}
}
/* Step 2: detach managed devices and make sure unmanaged devices
* have already been taken care of */
for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) {
virPCIDevicePtr pci = virPCIDeviceListGet(pcidevs, i);
if (virPCIDeviceGetManaged(pci)) {
/* We can't look up the actual device because it has not been
* created yet: virPCIDeviceDetach() will insert a copy of 'pci'
* into the list of inactive devices, and that copy will be the
* actual device going forward */
VIR_DEBUG("Detaching managed PCI device %s",
virPCIDeviceGetName(pci));
if (virPCIDeviceDetach(pci,
mgr->activePCIHostdevs,
mgr->inactivePCIHostdevs) < 0)
goto reattachdevs;
} else {
char *driverPath;
char *driverName;
int stub;
/* Unmanaged devices should already have been marked as
* inactive: if that's the case, we can simply move on */
if (virPCIDeviceListFind(mgr->inactivePCIHostdevs, pci)) {
VIR_DEBUG("Not detaching unmanaged PCI device %s",
virPCIDeviceGetName(pci));
continue;
}
/* If that's not the case, though, it might be because the
* daemon has been restarted, causing us to lose track of the
* device. Try and recover by marking the device as inactive
* if it happens to be bound to a known stub driver.
*
* FIXME Get rid of this once a proper way to keep track of
* information about active / inactive device across
* daemon restarts has been implemented */
if (virPCIDeviceGetDriverPathAndName(pci,
&driverPath, &driverName) < 0)
goto reattachdevs;
stub = virPCIStubDriverTypeFromString(driverName);
VIR_FREE(driverPath);
VIR_FREE(driverName);
if (stub > VIR_PCI_STUB_DRIVER_NONE &&
stub < VIR_PCI_STUB_DRIVER_LAST) {
/* The device is bound to a known stub driver: store this
* information and add a copy to the inactive list */
virPCIDeviceSetStubDriver(pci, stub);
VIR_DEBUG("Adding PCI device %s to inactive list",
virPCIDeviceGetName(pci));
if (virPCIDeviceListAddCopy(mgr->inactivePCIHostdevs, pci) < 0)
goto reattachdevs;
} else {
virReportError(VIR_ERR_OPERATION_INVALID,
_("Unmanaged PCI device %s must be manually "
"detached from the host"),
virPCIDeviceGetName(pci));
goto reattachdevs;
}
}
}
/* At this point, all devices are attached to the stub driver and have
* been marked as inactive */
/* Step 3: Now that all the PCI hostdevs have been detached, we
* can safely reset them */
for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) {
virPCIDevicePtr pci = virPCIDeviceListGet(pcidevs, i);
/* We can avoid looking up the actual device here, because performing
* a PCI reset on a device doesn't require any information other than
* the address, which 'pci' already contains */
VIR_DEBUG("Resetting PCI device %s", virPCIDeviceGetName(pci));
if (virPCIDeviceReset(pci, mgr->activePCIHostdevs,
mgr->inactivePCIHostdevs) < 0)
goto reattachdevs;
}
/* Step 4: For SRIOV network devices, Now that we have detached the
* the network device, set the netdev config */
for (i = 0; i < nhostdevs; i++) {
virDomainHostdevDefPtr hostdev = hostdevs[i];
if (!virHostdevIsPCINetDevice(hostdev))
continue;
if (virHostdevNetConfigReplace(hostdev, uuid,
mgr->stateDir) < 0) {
goto resetvfnetconfig;
}
last_processed_hostdev_vf = i;
}
/* Step 5: Move devices from the inactive list to the active list */
for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) {
virPCIDevicePtr pci = virPCIDeviceListGet(pcidevs, i);
virPCIDevicePtr actual;
VIR_DEBUG("Removing PCI device %s from inactive list",
virPCIDeviceGetName(pci));
actual = virPCIDeviceListSteal(mgr->inactivePCIHostdevs, pci);
VIR_DEBUG("Adding PCI device %s to active list",
virPCIDeviceGetName(pci));
if (!actual || virPCIDeviceListAdd(mgr->activePCIHostdevs, actual) < 0)
goto inactivedevs;
}
/* Step 6: Set driver and domain information */
for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) {
virPCIDevicePtr pci, actual;
/* We need to look up the actual device and set the information
* there because 'pci' only contain address information and will
* be released at the end of the function */
pci = virPCIDeviceListGet(pcidevs, i);
actual = virPCIDeviceListFind(mgr->activePCIHostdevs, pci);
VIR_DEBUG("Setting driver and domain information for PCI device %s",
virPCIDeviceGetName(pci));
if (actual)
virPCIDeviceSetUsedBy(actual, drv_name, dom_name);
}
/* Step 7: Now set the original states for hostdev def */
for (i = 0; i < nhostdevs; i++) {
virPCIDevicePtr actual;
virDomainHostdevDefPtr hostdev = hostdevs[i];
virDomainHostdevSubsysPCIPtr pcisrc = &hostdev->source.subsys.u.pci;
if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS)
continue;
if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI)
continue;
/* We need to look up the actual device because it's the one
* that contains the information we care about (unbind_from_stub,
* remove_slot, reprobe) */
actual = virPCIDeviceListFindByIDs(mgr->activePCIHostdevs,
pcisrc->addr.domain,
pcisrc->addr.bus,
pcisrc->addr.slot,
pcisrc->addr.function);
/* Appropriate values for the unbind_from_stub, remove_slot
* and reprobe properties of the device were set earlier
* by virPCIDeviceDetach() */
if (actual) {
VIR_DEBUG("Saving network configuration of PCI device %s",
virPCIDeviceGetName(actual));
hostdev->origstates.states.pci.unbind_from_stub =
virPCIDeviceGetUnbindFromStub(actual);
hostdev->origstates.states.pci.remove_slot =
virPCIDeviceGetRemoveSlot(actual);
hostdev->origstates.states.pci.reprobe =
virPCIDeviceGetReprobe(actual);
}
}
ret = 0;
goto cleanup;
inactivedevs:
/* Move devices back to the inactive list so that they can be
* processed properly below (reattachdevs label) */
for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) {
virPCIDevicePtr pci = virPCIDeviceListGet(pcidevs, i);
virPCIDevicePtr actual;
VIR_DEBUG("Removing PCI device %s from active list",
virPCIDeviceGetName(pci));
if (!(actual = virPCIDeviceListSteal(mgr->activePCIHostdevs, pci)))
continue;
VIR_DEBUG("Adding PCI device %s to inactive list",
virPCIDeviceGetName(pci));
if (virPCIDeviceListAdd(mgr->inactivePCIHostdevs, actual) < 0)
VIR_WARN("Failed to add PCI device %s to the inactive list",
virPCIDeviceGetName(pci));
}
resetvfnetconfig:
if (last_processed_hostdev_vf >= 0) {
for (i = 0; i <= last_processed_hostdev_vf; i++)
virHostdevNetConfigRestore(hostdevs[i], mgr->stateDir, NULL);
}
reattachdevs:
for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) {
virPCIDevicePtr pci = virPCIDeviceListGet(pcidevs, i);
virPCIDevicePtr actual;
/* We need to look up the actual device because that's what
* virPCIDeviceReattach() exepects as its argument */
if (!(actual = virPCIDeviceListFind(mgr->inactivePCIHostdevs, pci)))
continue;
if (virPCIDeviceGetManaged(actual)) {
VIR_DEBUG("Reattaching managed PCI device %s",
virPCIDeviceGetName(pci));
ignore_value(virPCIDeviceReattach(actual,
mgr->activePCIHostdevs,
mgr->inactivePCIHostdevs));
} else {
VIR_DEBUG("Not reattaching unmanaged PCI device %s",
virPCIDeviceGetName(pci));
}
}
cleanup:
virObjectUnref(pcidevs);
virObjectUnlock(mgr->activePCIHostdevs);
virObjectUnlock(mgr->inactivePCIHostdevs);
return ret;
}
/*
* Pre-condition: inactivePCIHostdevs & activePCIHostdevs
* are locked
*/
static void
virHostdevReattachPCIDevice(virHostdevManagerPtr mgr,
virPCIDevicePtr actual)
{
/* Wait for device cleanup if it is qemu/kvm */
if (virPCIDeviceGetStubDriver(actual) == VIR_PCI_STUB_DRIVER_KVM) {
int retries = 100;
while (virPCIDeviceWaitForCleanup(actual, "kvm_assigned_device")
&& retries) {
usleep(100*1000);
retries--;
}
}
VIR_DEBUG("Reattaching PCI device %s", virPCIDeviceGetName(actual));
if (virPCIDeviceReattach(actual, mgr->activePCIHostdevs,
mgr->inactivePCIHostdevs) < 0) {
VIR_ERROR(_("Failed to re-attach PCI device: %s"),
virGetLastErrorMessage());
virResetLastError();
}
}
/* @oldStateDir:
* For upgrade purpose: see virHostdevNetConfigRestore
*/
void
virHostdevReAttachPCIDevices(virHostdevManagerPtr mgr,
const char *drv_name,
const char *dom_name,
virDomainHostdevDefPtr *hostdevs,
int nhostdevs,
const char *oldStateDir)
{
virPCIDeviceListPtr pcidevs;
size_t i;
if (!nhostdevs)
return;
virObjectLock(mgr->activePCIHostdevs);
virObjectLock(mgr->inactivePCIHostdevs);
if (!(pcidevs = virHostdevGetPCIHostDeviceList(hostdevs, nhostdevs))) {
VIR_ERROR(_("Failed to allocate PCI device list: %s"),
virGetLastErrorMessage());
virResetLastError();
goto cleanup;
}
/* Reattaching devices to the host involves several steps; each
* of them is described at length below */
/* Step 1: Filter out all devices that are either not active or not
* used by the current domain and driver */
i = 0;
while (i < virPCIDeviceListCount(pcidevs)) {
virPCIDevicePtr pci = virPCIDeviceListGet(pcidevs, i);
virPCIDevicePtr actual = NULL;
/* We need to look up the actual device, which is the one containing
* information such as by which domain and driver it is used. As a
* side effect, by looking it up we can also tell whether it was
* really active in the first place */
actual = virPCIDeviceListFind(mgr->activePCIHostdevs, pci);
if (actual) {
const char *actual_drvname;
const char *actual_domname;
virPCIDeviceGetUsedBy(actual, &actual_drvname, &actual_domname);
if (STRNEQ_NULLABLE(drv_name, actual_drvname) ||
STRNEQ_NULLABLE(dom_name, actual_domname)) {
virPCIDeviceListDel(pcidevs, pci);
continue;
}
} else {
virPCIDeviceListDel(pcidevs, pci);
continue;
}
i++;
}
/* Step 2: Move devices from the active list to the inactive list */
for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) {
virPCIDevicePtr pci = virPCIDeviceListGet(pcidevs, i);
virPCIDevicePtr actual;
VIR_DEBUG("Removing PCI device %s from active list",
virPCIDeviceGetName(pci));
actual = virPCIDeviceListSteal(mgr->activePCIHostdevs, pci);
VIR_DEBUG("Adding PCI device %s to inactive list",
virPCIDeviceGetName(pci));
if (!actual ||
virPCIDeviceListAdd(mgr->inactivePCIHostdevs, actual) < 0) {
VIR_ERROR(_("Failed to add PCI device %s to the inactive list"),
virGetLastErrorMessage());
virResetLastError();
}
}
/* At this point, any device that had been used by the guest has been
* moved to the inactive list */
/* Step 3: restore original network config of hostdevs that used
* <interface type='hostdev'>
*/
for (i = 0; i < nhostdevs; i++) {
virDomainHostdevDefPtr hostdev = hostdevs[i];
if (virHostdevIsPCINetDevice(hostdev)) {
virDomainHostdevSubsysPCIPtr pcisrc = &hostdev->source.subsys.u.pci;
virPCIDevicePtr actual;
actual = virPCIDeviceListFindByIDs(mgr->inactivePCIHostdevs,
pcisrc->addr.domain,
pcisrc->addr.bus,
pcisrc->addr.slot,
pcisrc->addr.function);
if (actual) {
VIR_DEBUG("Restoring network configuration of PCI device %s",
virPCIDeviceGetName(actual));
virHostdevNetConfigRestore(hostdev, mgr->stateDir,
oldStateDir);
}
}
}
/* Step 4: perform a PCI Reset on all devices */
for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) {
virPCIDevicePtr pci = virPCIDeviceListGet(pcidevs, i);
/* We can avoid looking up the actual device here, because performing
* a PCI reset on a device doesn't require any information other than
* the address, which 'pci' already contains */
VIR_DEBUG("Resetting PCI device %s", virPCIDeviceGetName(pci));
if (virPCIDeviceReset(pci, mgr->activePCIHostdevs,
mgr->inactivePCIHostdevs) < 0) {
VIR_ERROR(_("Failed to reset PCI device: %s"),
virGetLastErrorMessage());
virResetLastError();
}
}
/* Step 5: Reattach managed devices to their host drivers; unmanaged
* devices don't need to be processed further */
for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) {
virPCIDevicePtr pci = virPCIDeviceListGet(pcidevs, i);
virPCIDevicePtr actual;
/* We need to look up the actual device because that's what
* virHostdevReattachPCIDevice() expects as its argument */
if (!(actual = virPCIDeviceListFind(mgr->inactivePCIHostdevs, pci)))
continue;
if (virPCIDeviceGetManaged(actual))
virHostdevReattachPCIDevice(mgr, actual);
else
VIR_DEBUG("Not reattaching unmanaged PCI device %s",
virPCIDeviceGetName(actual));
}
cleanup:
virObjectUnref(pcidevs);
virObjectUnlock(mgr->activePCIHostdevs);
virObjectUnlock(mgr->inactivePCIHostdevs);
}
int
virHostdevUpdateActivePCIDevices(virHostdevManagerPtr mgr,
virDomainHostdevDefPtr *hostdevs,
int nhostdevs,
const char *drv_name,
const char *dom_name)
{
virDomainHostdevDefPtr hostdev = NULL;
virPCIDevicePtr actual = NULL;
size_t i;
int ret = -1;
if (!nhostdevs)
return 0;
virObjectLock(mgr->activePCIHostdevs);
virObjectLock(mgr->inactivePCIHostdevs);
for (i = 0; i < nhostdevs; i++) {
virDomainHostdevSubsysPCIPtr pcisrc;
hostdev = hostdevs[i];
pcisrc = &hostdev->source.subsys.u.pci;
if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS)
continue;
if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI)
continue;
actual = virPCIDeviceNew(pcisrc->addr.domain, pcisrc->addr.bus,
pcisrc->addr.slot, pcisrc->addr.function);
if (!actual)
goto cleanup;
virPCIDeviceSetManaged(actual, hostdev->managed);
virPCIDeviceSetUsedBy(actual, drv_name, dom_name);
if (pcisrc->backend == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_VFIO)
virPCIDeviceSetStubDriver(actual, VIR_PCI_STUB_DRIVER_VFIO);
else if (pcisrc->backend == VIR_DOMAIN_HOSTDEV_PCI_BACKEND_XEN)
virPCIDeviceSetStubDriver(actual, VIR_PCI_STUB_DRIVER_XEN);
else
virPCIDeviceSetStubDriver(actual, VIR_PCI_STUB_DRIVER_KVM);
/* Setup the original states for the PCI device */
virPCIDeviceSetUnbindFromStub(actual, hostdev->origstates.states.pci.unbind_from_stub);
virPCIDeviceSetRemoveSlot(actual, hostdev->origstates.states.pci.remove_slot);
virPCIDeviceSetReprobe(actual, hostdev->origstates.states.pci.reprobe);
if (virPCIDeviceListAdd(mgr->activePCIHostdevs, actual) < 0)
goto cleanup;
actual = NULL;
}
ret = 0;
cleanup:
virPCIDeviceFree(actual);
virObjectUnlock(mgr->activePCIHostdevs);
virObjectUnlock(mgr->inactivePCIHostdevs);
return ret;
}
int
virHostdevUpdateActiveUSBDevices(virHostdevManagerPtr mgr,
virDomainHostdevDefPtr *hostdevs,
int nhostdevs,
const char *drv_name,
const char *dom_name)
{
virDomainHostdevDefPtr hostdev = NULL;
size_t i;
int ret = -1;
if (!nhostdevs)
return 0;
virObjectLock(mgr->activeUSBHostdevs);
for (i = 0; i < nhostdevs; i++) {
virDomainHostdevSubsysUSBPtr usbsrc;
virUSBDevicePtr usb = NULL;
hostdev = hostdevs[i];
usbsrc = &hostdev->source.subsys.u.usb;
if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS)
continue;
if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB)
continue;
if (!(usb = virUSBDeviceNew(usbsrc->bus, usbsrc->device, NULL))) {
VIR_WARN("Unable to reattach USB device %03d.%03d on domain %s",
usbsrc->bus, usbsrc->device, dom_name);
continue;
}
virUSBDeviceSetUsedBy(usb, drv_name, dom_name);
if (virUSBDeviceListAdd(mgr->activeUSBHostdevs, usb) < 0) {
virUSBDeviceFree(usb);
goto cleanup;
}
}
ret = 0;
cleanup:
virObjectUnlock(mgr->activeUSBHostdevs);
return ret;
}
static int
virHostdevUpdateActiveSCSIHostDevices(virHostdevManagerPtr mgr,
virDomainHostdevDefPtr hostdev,
virDomainHostdevSubsysSCSIPtr scsisrc,
const char *drv_name,
const char *dom_name)
{
virDomainHostdevSubsysSCSIHostPtr scsihostsrc = &scsisrc->u.host;
virSCSIDevicePtr scsi = NULL;
virSCSIDevicePtr tmp = NULL;
int ret = -1;
if (!(scsi = virSCSIDeviceNew(NULL,
scsihostsrc->adapter, scsihostsrc->bus,
scsihostsrc->target, scsihostsrc->unit,
hostdev->readonly, hostdev->shareable)))
goto cleanup;
if ((tmp = virSCSIDeviceListFind(mgr->activeSCSIHostdevs, scsi))) {
if (virSCSIDeviceSetUsedBy(tmp, drv_name, dom_name) < 0) {
virSCSIDeviceFree(scsi);
goto cleanup;
}
virSCSIDeviceFree(scsi);
} else {
if (virSCSIDeviceSetUsedBy(scsi, drv_name, dom_name) < 0 ||
virSCSIDeviceListAdd(mgr->activeSCSIHostdevs, scsi) < 0) {
virSCSIDeviceFree(scsi);
goto cleanup;
}
}
ret = 0;
cleanup:
return ret;
}
int
virHostdevUpdateActiveSCSIDevices(virHostdevManagerPtr mgr,
virDomainHostdevDefPtr *hostdevs,
int nhostdevs,
const char *drv_name,
const char *dom_name)
{
virDomainHostdevDefPtr hostdev = NULL;
size_t i;
int ret = -1;
if (!nhostdevs)
return 0;
virObjectLock(mgr->activeSCSIHostdevs);
for (i = 0; i < nhostdevs; i++) {
virDomainHostdevSubsysSCSIPtr scsisrc;
hostdev = hostdevs[i];
scsisrc = &hostdev->source.subsys.u.scsi;
if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS ||
hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI)
continue;
if (scsisrc->protocol == VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_ISCSI) {
continue; /* Not supported for iSCSI */
} else {
if (virHostdevUpdateActiveSCSIHostDevices(mgr, hostdev, scsisrc,
drv_name, dom_name) < 0)
goto cleanup;
}
}
ret = 0;
cleanup:
virObjectUnlock(mgr->activeSCSIHostdevs);
return ret;
}
static int
virHostdevMarkUSBDevices(virHostdevManagerPtr mgr,
const char *drv_name,
const char *dom_name,
virUSBDeviceListPtr list)
{
size_t i, j;
unsigned int count;
virUSBDevicePtr tmp;
virObjectLock(mgr->activeUSBHostdevs);
count = virUSBDeviceListCount(list);
for (i = 0; i < count; i++) {
virUSBDevicePtr usb = virUSBDeviceListGet(list, i);
if ((tmp = virUSBDeviceListFind(mgr->activeUSBHostdevs, usb))) {
const char *other_drvname;
const char *other_domname;
virUSBDeviceGetUsedBy(tmp, &other_drvname, &other_domname);
if (other_drvname && other_domname)
virReportError(VIR_ERR_OPERATION_INVALID,
_("USB device %s is in use by "
"driver %s, domain %s"),
virUSBDeviceGetName(tmp),
other_drvname, other_domname);
else
virReportError(VIR_ERR_OPERATION_INVALID,
_("USB device %s is already in use"),
virUSBDeviceGetName(tmp));
goto error;
}
virUSBDeviceSetUsedBy(usb, drv_name, dom_name);
VIR_DEBUG("Adding %03d.%03d dom=%s to activeUSBHostdevs",
virUSBDeviceGetBus(usb), virUSBDeviceGetDevno(usb),
dom_name);
/*
* The caller is responsible to steal these usb devices
* from the virUSBDeviceList that passed in on success,
* perform rollback on failure.
*/
if (virUSBDeviceListAdd(mgr->activeUSBHostdevs, usb) < 0)
goto error;
}
virObjectUnlock(mgr->activeUSBHostdevs);
return 0;
error:
for (j = 0; j < i; j++) {
tmp = virUSBDeviceListGet(list, i);
virUSBDeviceListSteal(mgr->activeUSBHostdevs, tmp);
}
virObjectUnlock(mgr->activeUSBHostdevs);
return -1;
}
int
virHostdevFindUSBDevice(virDomainHostdevDefPtr hostdev,
bool mandatory,
virUSBDevicePtr *usb)
{
virDomainHostdevSubsysUSBPtr usbsrc = &hostdev->source.subsys.u.usb;
unsigned vendor = usbsrc->vendor;
unsigned product = usbsrc->product;
unsigned bus = usbsrc->bus;
unsigned device = usbsrc->device;
bool autoAddress = usbsrc->autoAddress;
int rc;
*usb = NULL;
if (vendor && bus) {
rc = virUSBDeviceFind(vendor, product, bus, device,
NULL,
autoAddress ? false : mandatory,
usb);
if (rc < 0) {
return -1;
} else if (!autoAddress) {
goto out;
} else {
VIR_INFO("USB device %x:%x could not be found at previous"
" address (bus:%u device:%u)",
vendor, product, bus, device);
}
}
/* When vendor is specified, its USB address is either unspecified or the
* device could not be found at the USB device where it had been
* automatically found before.
*/
if (vendor) {
virUSBDeviceListPtr devs;
rc = virUSBDeviceFindByVendor(vendor, product, NULL, mandatory, &devs);
if (rc < 0)
return -1;
if (rc == 1) {
*usb = virUSBDeviceListGet(devs, 0);
virUSBDeviceListSteal(devs, *usb);
}
virObjectUnref(devs);
if (rc == 0) {
goto out;
} else if (rc > 1) {
if (autoAddress) {
virReportError(VIR_ERR_OPERATION_FAILED,
_("Multiple USB devices for %x:%x were found,"
" but none of them is at bus:%u device:%u"),
vendor, product, bus, device);
} else {
virReportError(VIR_ERR_OPERATION_FAILED,
_("Multiple USB devices for %x:%x, "
"use <address> to specify one"),
vendor, product);
}
return -1;
}
usbsrc->bus = virUSBDeviceGetBus(*usb);
usbsrc->device = virUSBDeviceGetDevno(*usb);
usbsrc->autoAddress = true;
if (autoAddress) {
VIR_INFO("USB device %x:%x found at bus:%u device:%u (moved"
" from bus:%u device:%u)",
vendor, product,
usbsrc->bus, usbsrc->device,
bus, device);
}
} else if (!vendor && bus) {
if (virUSBDeviceFindByBus(bus, device, NULL, mandatory, usb) < 0)
return -1;
}
out:
if (!*usb)
hostdev->missing = true;
return 0;
}
int
virHostdevPrepareUSBDevices(virHostdevManagerPtr mgr,
const char *drv_name,
const char *dom_name,
virDomainHostdevDefPtr *hostdevs,
int nhostdevs,
unsigned int flags)
{
size_t i;
int ret = -1;
virUSBDeviceListPtr list;
virUSBDevicePtr tmp;
bool coldBoot = !!(flags & VIR_HOSTDEV_COLD_BOOT);
if (!nhostdevs)
return 0;
/* To prevent situation where USB device is assigned to two domains
* we need to keep a list of currently assigned USB devices.
* This is done in several loops which cannot be joined into one big
* loop. See virHostdevPreparePCIDevices()
*/
if (!(list = virUSBDeviceListNew()))
goto cleanup;
/* Loop 1: build temporary list
*/
for (i = 0; i < nhostdevs; i++) {
virDomainHostdevDefPtr hostdev = hostdevs[i];
bool required = true;
virUSBDevicePtr usb;
if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS)
continue;
if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB)
continue;
if (hostdev->startupPolicy == VIR_DOMAIN_STARTUP_POLICY_OPTIONAL ||
(hostdev->startupPolicy == VIR_DOMAIN_STARTUP_POLICY_REQUISITE &&
!coldBoot))
required = false;
if (virHostdevFindUSBDevice(hostdev, required, &usb) < 0)
goto cleanup;
if (usb && virUSBDeviceListAdd(list, usb) < 0) {
virUSBDeviceFree(usb);
goto cleanup;
}
}
/* Mark devices in temporary list as used by @dom_name
* and add them do driver list. However, if something goes
* wrong, perform rollback.
*/
if (virHostdevMarkUSBDevices(mgr, drv_name, dom_name, list) < 0)
goto cleanup;
/* Loop 2: Temporary list was successfully merged with
* driver list, so steal all items to avoid freeing them
* in cleanup label.
*/
while (virUSBDeviceListCount(list) > 0) {
tmp = virUSBDeviceListGet(list, 0);
virUSBDeviceListSteal(list, tmp);
}
ret = 0;
cleanup:
virObjectUnref(list);
return ret;
}
static int
virHostdevPrepareSCSIHostDevices(virDomainHostdevDefPtr hostdev,
virDomainHostdevSubsysSCSIPtr scsisrc,
virSCSIDeviceListPtr list)
{
virDomainHostdevSubsysSCSIHostPtr scsihostsrc = &scsisrc->u.host;
virSCSIDevicePtr scsi;
int ret = -1;
if (hostdev->managed) {
virReportError(VIR_ERR_XML_ERROR, "%s",
_("SCSI host device doesn't support managed mode"));
goto cleanup;
}
if (!(scsi = virSCSIDeviceNew(NULL,
scsihostsrc->adapter, scsihostsrc->bus,
scsihostsrc->target, scsihostsrc->unit,
hostdev->readonly, hostdev->shareable)))
goto cleanup;
if (virSCSIDeviceListAdd(list, scsi) < 0) {
virSCSIDeviceFree(scsi);
goto cleanup;
}
ret = 0;
cleanup:
return ret;
}
int
virHostdevPrepareSCSIDevices(virHostdevManagerPtr mgr,
const char *drv_name,
const char *dom_name,
virDomainHostdevDefPtr *hostdevs,
int nhostdevs)
{
size_t i, j;
int count;
virSCSIDeviceListPtr list;
virSCSIDevicePtr tmp;
if (!nhostdevs)
return 0;
/* To prevent situation where SCSI device is assigned to two domains
* we need to keep a list of currently assigned SCSI devices.
* This is done in several loops which cannot be joined into one big
* loop. See virHostdevPreparePCIDevices()
*/
if (!(list = virSCSIDeviceListNew()))
goto cleanup;
/* Loop 1: build temporary list */
for (i = 0; i < nhostdevs; i++) {
virDomainHostdevDefPtr hostdev = hostdevs[i];
virDomainHostdevSubsysSCSIPtr scsisrc = &hostdev->source.subsys.u.scsi;
if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS ||
hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI)
continue;
if (scsisrc->protocol == VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_ISCSI) {
continue; /* Not supported for iSCSI */
} else {
if (virHostdevPrepareSCSIHostDevices(hostdev, scsisrc, list) < 0)
goto cleanup;
}
}
/* Loop 2: Mark devices in temporary list as used by @name
* and add them to driver list. However, if something goes
* wrong, perform rollback.
*/
virObjectLock(mgr->activeSCSIHostdevs);
count = virSCSIDeviceListCount(list);
for (i = 0; i < count; i++) {
virSCSIDevicePtr scsi = virSCSIDeviceListGet(list, i);
if ((tmp = virSCSIDeviceListFind(mgr->activeSCSIHostdevs,
scsi))) {
bool scsi_shareable = virSCSIDeviceGetShareable(scsi);
bool tmp_shareable = virSCSIDeviceGetShareable(tmp);
if (!(scsi_shareable && tmp_shareable)) {
virReportError(VIR_ERR_OPERATION_INVALID,
_("SCSI device %s is already in use by "
"other domain(s) as '%s'"),
virSCSIDeviceGetName(tmp),
tmp_shareable ? "shareable" : "non-shareable");
goto error;
}
if (virSCSIDeviceSetUsedBy(tmp, drv_name, dom_name) < 0)
goto error;
} else {
if (virSCSIDeviceSetUsedBy(scsi, drv_name, dom_name) < 0)
goto error;
VIR_DEBUG("Adding %s to activeSCSIHostdevs", virSCSIDeviceGetName(scsi));
if (virSCSIDeviceListAdd(mgr->activeSCSIHostdevs, scsi) < 0)
goto error;
}
}
virObjectUnlock(mgr->activeSCSIHostdevs);
/* Loop 3: Temporary list was successfully merged with
* driver list, so steal all items to avoid freeing them
* when freeing temporary list.
*/
while (virSCSIDeviceListCount(list) > 0) {
tmp = virSCSIDeviceListGet(list, 0);
virSCSIDeviceListSteal(list, tmp);
}
virObjectUnref(list);
return 0;
error:
for (j = 0; j < i; j++) {
tmp = virSCSIDeviceListGet(list, i);
virSCSIDeviceListSteal(mgr->activeSCSIHostdevs, tmp);
}
virObjectUnlock(mgr->activeSCSIHostdevs);
cleanup:
virObjectUnref(list);
return -1;
}
void
virHostdevReAttachUSBDevices(virHostdevManagerPtr mgr,
const char *drv_name,
const char *dom_name,
virDomainHostdevDefPtr *hostdevs,
int nhostdevs)
{
size_t i;
if (!nhostdevs)
return;
virObjectLock(mgr->activeUSBHostdevs);
for (i = 0; i < nhostdevs; i++) {
virDomainHostdevDefPtr hostdev = hostdevs[i];
virDomainHostdevSubsysUSBPtr usbsrc = &hostdev->source.subsys.u.usb;
virUSBDevicePtr usb, tmp;
const char *usedby_drvname;
const char *usedby_domname;
if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS)
continue;
if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB)
continue;
if (hostdev->missing)
continue;
if (!(usb = virUSBDeviceNew(usbsrc->bus, usbsrc->device, NULL))) {
VIR_WARN("Unable to reattach USB device %03d.%03d on domain %s",
usbsrc->bus, usbsrc->device, dom_name);
continue;
}
/* Delete only those USB devices which belongs
* to domain @name because qemuProcessStart() might
* have failed because USB device is already taken.
* Therefore we want to steal only those devices from
* the list which were taken by @name */
tmp = virUSBDeviceListFind(mgr->activeUSBHostdevs, usb);
virUSBDeviceFree(usb);
if (!tmp) {
VIR_WARN("Unable to find device %03d.%03d "
"in list of active USB devices",
usbsrc->bus, usbsrc->device);
continue;
}
virUSBDeviceGetUsedBy(tmp, &usedby_drvname, &usedby_domname);
if (STREQ_NULLABLE(drv_name, usedby_drvname) &&
STREQ_NULLABLE(dom_name, usedby_domname)) {
VIR_DEBUG("Removing %03d.%03d dom=%s from activeUSBHostdevs",
usbsrc->bus, usbsrc->device, dom_name);
virUSBDeviceListDel(mgr->activeUSBHostdevs, tmp);
}
}
virObjectUnlock(mgr->activeUSBHostdevs);
}
static void
virHostdevReAttachSCSIHostDevices(virHostdevManagerPtr mgr,
virDomainHostdevDefPtr hostdev,
virDomainHostdevSubsysSCSIPtr scsisrc,
const char *drv_name,
const char *dom_name)
{
virDomainHostdevSubsysSCSIHostPtr scsihostsrc = &scsisrc->u.host;
virSCSIDevicePtr scsi;
virSCSIDevicePtr tmp;
if (!(scsi = virSCSIDeviceNew(NULL,
scsihostsrc->adapter, scsihostsrc->bus,
scsihostsrc->target, scsihostsrc->unit,
hostdev->readonly, hostdev->shareable))) {
VIR_WARN("Unable to reattach SCSI device %s:%u:%u:%llu on domain %s",
scsihostsrc->adapter, scsihostsrc->bus, scsihostsrc->target,
scsihostsrc->unit, dom_name);
return;
}
/* Only delete the devices which are marked as being used by @name,
* because qemuProcessStart could fail half way through. */
if (!(tmp = virSCSIDeviceListFind(mgr->activeSCSIHostdevs, scsi))) {
VIR_WARN("Unable to find device %s:%u:%u:%llu "
"in list of active SCSI devices",
scsihostsrc->adapter, scsihostsrc->bus,
scsihostsrc->target, scsihostsrc->unit);
virSCSIDeviceFree(scsi);
return;
}
VIR_DEBUG("Removing %s:%u:%u:%llu dom=%s from activeSCSIHostdevs",
scsihostsrc->adapter, scsihostsrc->bus, scsihostsrc->target,
scsihostsrc->unit, dom_name);
virSCSIDeviceListDel(mgr->activeSCSIHostdevs, tmp,
drv_name, dom_name);
virSCSIDeviceFree(scsi);
}
void
virHostdevReAttachSCSIDevices(virHostdevManagerPtr mgr,
const char *drv_name,
const char *dom_name,
virDomainHostdevDefPtr *hostdevs,
int nhostdevs)
{
size_t i;
if (!nhostdevs)
return;
virObjectLock(mgr->activeSCSIHostdevs);
for (i = 0; i < nhostdevs; i++) {
virDomainHostdevDefPtr hostdev = hostdevs[i];
virDomainHostdevSubsysSCSIPtr scsisrc = &hostdev->source.subsys.u.scsi;
if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS ||
hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI)
continue;
if (scsisrc->protocol == VIR_DOMAIN_HOSTDEV_SCSI_PROTOCOL_TYPE_ISCSI)
continue; /* Not supported for iSCSI */
else
virHostdevReAttachSCSIHostDevices(mgr, hostdev, scsisrc,
drv_name, dom_name);
}
virObjectUnlock(mgr->activeSCSIHostdevs);
}
int
virHostdevPCINodeDeviceDetach(virHostdevManagerPtr mgr,
virPCIDevicePtr pci)
{
struct virHostdevIsPCINodeDeviceUsedData data = { mgr, NULL, false };
int ret = -1;
virObjectLock(mgr->activePCIHostdevs);
virObjectLock(mgr->inactivePCIHostdevs);
if (virHostdevIsPCINodeDeviceUsed(virPCIDeviceGetAddress(pci), &data))
goto cleanup;
if (virPCIDeviceDetach(pci, mgr->activePCIHostdevs,
mgr->inactivePCIHostdevs) < 0)
goto cleanup;
ret = 0;
cleanup:
virObjectUnlock(mgr->inactivePCIHostdevs);
virObjectUnlock(mgr->activePCIHostdevs);
return ret;
}
int
virHostdevPCINodeDeviceReAttach(virHostdevManagerPtr mgr,
virPCIDevicePtr pci)
{
struct virHostdevIsPCINodeDeviceUsedData data = { mgr, NULL, false };
int ret = -1;
virObjectLock(mgr->activePCIHostdevs);
virObjectLock(mgr->inactivePCIHostdevs);
if (virHostdevIsPCINodeDeviceUsed(virPCIDeviceGetAddress(pci), &data))
goto cleanup;
virPCIDeviceSetUnbindFromStub(pci, true);
virPCIDeviceSetRemoveSlot(pci, true);
virPCIDeviceSetReprobe(pci, true);
if (virPCIDeviceReattach(pci, mgr->activePCIHostdevs,
mgr->inactivePCIHostdevs) < 0)
goto cleanup;
ret = 0;
cleanup:
virObjectUnlock(mgr->inactivePCIHostdevs);
virObjectUnlock(mgr->activePCIHostdevs);
return ret;
}
int
virHostdevPCINodeDeviceReset(virHostdevManagerPtr mgr,
virPCIDevicePtr pci)
{
int ret = -1;
virObjectLock(mgr->activePCIHostdevs);
virObjectLock(mgr->inactivePCIHostdevs);
if (virPCIDeviceReset(pci, mgr->activePCIHostdevs,
mgr->inactivePCIHostdevs) < 0)
goto out;
ret = 0;
out:
virObjectUnlock(mgr->inactivePCIHostdevs);
virObjectUnlock(mgr->activePCIHostdevs);
return ret;
}
int
virHostdevPrepareDomainDevices(virHostdevManagerPtr mgr,
const char *driver,
virDomainDefPtr def,
unsigned int flags)
{
if (!def->nhostdevs)
return 0;
if (mgr == NULL)
return -1;
if (flags & VIR_HOSTDEV_SP_PCI) {
if (virHostdevPreparePCIDevices(mgr, driver,
def->name, def->uuid,
def->hostdevs,
def->nhostdevs,
flags) < 0)
return -1;
}
if (flags & VIR_HOSTDEV_SP_USB) {
if (virHostdevPrepareUSBDevices(mgr, driver, def->name,
def->hostdevs, def->nhostdevs,
flags) < 0)
return -1;
}
if (flags & VIR_HOSTDEV_SP_SCSI) {
if (virHostdevPrepareSCSIDevices(mgr, driver, def->name,
def->hostdevs, def->nhostdevs) < 0)
return -1;
}
return 0;
}
/* @oldStateDir
* For upgrade purpose: see virHostdevReAttachPCIHostdevs
*/
void
virHostdevReAttachDomainDevices(virHostdevManagerPtr mgr,
const char *driver,
virDomainDefPtr def,
unsigned int flags,
const char *oldStateDir)
{
if (!def->nhostdevs || !mgr)
return;
if (flags & VIR_HOSTDEV_SP_PCI) {
virHostdevReAttachPCIDevices(mgr, driver, def->name,
def->hostdevs, def->nhostdevs,
oldStateDir);
}
if (flags & VIR_HOSTDEV_SP_USB) {
virHostdevReAttachUSBDevices(mgr, driver, def->name,
def->hostdevs, def->nhostdevs);
}
if (flags & VIR_HOSTDEV_SP_SCSI) {
virHostdevReAttachSCSIDevices(mgr, driver, def->name,
def->hostdevs, def->nhostdevs);
}
}
int
virHostdevUpdateActiveDomainDevices(virHostdevManagerPtr mgr,
const char *driver,
virDomainDefPtr def,
unsigned int flags)
{
if (!def->nhostdevs)
return 0;
if (flags & VIR_HOSTDEV_SP_PCI) {
if (virHostdevUpdateActivePCIDevices(mgr,
def->hostdevs,
def->nhostdevs,
driver, def->name) < 0)
return -1;
}
if (flags & VIR_HOSTDEV_SP_USB) {
if (virHostdevUpdateActiveUSBDevices(mgr,
def->hostdevs,
def->nhostdevs,
driver, def->name) < 0)
return -1;
}
if (flags & VIR_HOSTDEV_SP_SCSI) {
if (virHostdevUpdateActiveSCSIDevices(mgr,
def->hostdevs,
def->nhostdevs,
driver, def->name) < 0)
return -1;
}
return 0;
}
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