Re: [libvirt] [PATCH v12 06/11] add hostdev passthrough common library

Extract code from qemu_hostdev.c and make it reusable for multiple drivers, meanwhile maintain a global hostdev state to solve conflict between different drivers.

Signed-off-by: Chunyan Liu <cyliu(a)suse.com&gt; --- po/POTFILES.in | 1 + src/Makefile.am | 1 + src/libvirt_private.syms | 21 + src/util/virhostdev.c | 1775 ++++++++++++++++++++++++++++++++++++++++++++++ src/util/virhostdev.h | 134 ++++ 5 files changed, 1932 insertions(+), 0 deletions(-) create mode 100644 src/util/virhostdev.c create mode 100644 src/util/virhostdev.h diff --git a/po/POTFILES.in b/po/POTFILES.in index 0359b2f..60c226a 100644 --- a/po/POTFILES.in +++ b/po/POTFILES.in @@ -160,6 +160,7 @@ src/util/vireventpoll.c src/util/virfile.c src/util/virhash.c src/util/virhook.c +src/util/virhostdev.c src/util/viridentity.c src/util/virinitctl.c src/util/viriptables.c diff --git a/src/Makefile.am b/src/Makefile.am index 3f8d22f..04ea01b 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -104,6 +104,7 @@ UTIL_SOURCES = \ util/virhash.c util/virhash.h \ util/virhashcode.c util/virhashcode.h \ util/virhook.c util/virhook.h \ + util/virhostdev.c util/virhostdev.h \ util/viridentity.c util/viridentity.h \ util/virinitctl.c util/virinitctl.h \ util/viriptables.c util/viriptables.h \ diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms index 2c9536a..b283f8e 100644 --- a/src/libvirt_private.syms +++ b/src/libvirt_private.syms @@ -1276,6 +1276,27 @@ virHookInitialize; virHookPresent; +#util/virhostdev.h +virHostdevHostSupportsPassthroughKVM; +virHostdevHostSupportsPassthroughVFIO; +virHostdevManagerGetDefault; +virHostdevPciNodeDeviceDetach; +virHostdevPciNodeDeviceReAttach; +virHostdevPciNodeDeviceReset; +virHostdevPrepareDomainHostdevs; +virHostdevPreparePciHostdevs; +virHostdevPrepareScsiHostdevs; +virHostdevPrepareUsbHostdevs; +virHostdevReAttachDomainHostdevs; +virHostdevReAttachPciHostdevs; +virHostdevReAttachScsiHostdevs; +virHostdevReAttachUsbHostdevs; +virHostdevUpdateActiveHostdevs; +virHostdevUpdateActivePciHostdevs; +virHostdevUpdateActiveScsiHostdevs; +virHostdevUpdateActiveUsbHostdevs; + + # util/viridentity.h virIdentityGetAttr; virIdentityGetCurrent; diff --git a/src/util/virhostdev.c b/src/util/virhostdev.c new file mode 100644 index 0000000..8d75a77 --- /dev/null +++ b/src/util/virhostdev.c @@ -0,0 +1,1775 @@ +/* virhostdev.c: hostdev management + * + * Copyright (C) 2014 SUSE LINUX Products GmbH, Nuernberg, Germany. + * Copyright (C) 2006-2007, 2009-2014 Red Hat, Inc. + * Copyright (C) 2006 Daniel P. Berrange + * + * 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: Chunyan Liu <cyliu(a)suse.com&gt; + * Author: Daniel P. Berrange <berrange(a)redhat.com&gt; + */ + +#include <config.h> + +#include <dirent.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 "virnetdev.h" +#include "virutil.h" +#include "configmake.h" + +#define VIR_FROM_THIS VIR_FROM_NONE + +#define HOSTDEV_STATE_DIR LOCALSTATEDIR "/run/libvirt/hostdevmgr" + +/* for upgrade, may need to find netconfig file in old qemu state dir */ +#define QEMU_STATE_DIR LOCALSTATEDIR "/run/libvirt/qemu" + +static virHostdevManagerPtr hostdevMgr; + +static void +virHostdevManagerCleanup(void) +{ + if (!hostdevMgr) + return; + + virObjectUnref(hostdevMgr->activePciHostdevs); + virObjectUnref(hostdevMgr->inactivePciHostdevs); + virObjectUnref(hostdevMgr->activeUsbHostdevs); + VIR_FREE(hostdevMgr->stateDir); + + VIR_FREE(hostdevMgr); +} + +static int +virHostdevOnceInit(void) +{ + if (VIR_ALLOC(hostdevMgr) < 0) + goto error; + + if ((hostdevMgr->activePciHostdevs = virPCIDeviceListNew()) == NULL) + goto error; + + if ((hostdevMgr->activeUsbHostdevs = virUSBDeviceListNew()) == NULL) + goto error; + + if ((hostdevMgr->inactivePciHostdevs = virPCIDeviceListNew()) == NULL) + goto error; + + if ((hostdevMgr->activeScsiHostdevs = virSCSIDeviceListNew()) == NULL) + goto error; + + 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; + } + + return 0; + +error: + virHostdevManagerCleanup(); + return -1; +} + +VIR_ONCE_GLOBAL_INIT(virHostdev) + +virHostdevManagerPtr +virHostdevManagerGetDefault(void) +{ + if (virHostdevInitialize() < 0) + return NULL; + return hostdevMgr; +} + +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 int +virHostdevNetConfigVirtPortProfile(const char *linkdev, int vf, + virNetDevVPortProfilePtr virtPort, + const virMacAddr *macaddr, + const unsigned char *uuid, + int 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, + char *stateDir) +{ + char *linkdev = NULL; + virNetDevVlanPtr vlan; + virNetDevVPortProfilePtr virtPort; + int ret = -1; + int vf = -1; + int vlanid = -1; + int port_profile_associate = 1; + int isvf; + + isvf = virHostdevIsVirtualFunction(hostdev); + if (isvf <= 0) { + 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 */ + if (vlan) { + if (vlan->nTags != 1 || vlan->trunk) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("vlan trunking is not supported " + "by SR-IOV network devices")); + goto cleanup; + } + if (vf == -1) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, + _("vlan can only be set for SR-IOV VFs, but " + "%s is not a VF"), linkdev); + goto cleanup; + } + vlanid = vlan->tag[0]; + } else if (vf >= 0) { + vlanid = 0; /* assure any current vlan tag is reset */ + } + + ret = virNetDevReplaceNetConfig(linkdev, vf, + &hostdev->parent.data.net->mac, + vlanid, stateDir); + } +cleanup: + VIR_FREE(linkdev); + return ret; +} + +/* oldStateDir: + * For upgrade, if there is an existing VM on QEMU, the hostdev netconfig file + * is previously stored in /var/run/libvirt/qemu. With new version, it tries to + * find in hostdevManager->stateDir location but certainly it cannot find it. + * In this case, we should find in the old state dir. + */ +static int +virHostdevNetConfigRestore(virDomainHostdevDefPtr hostdev, + char *stateDir, + char *oldStateDir) +{ + char *linkdev = NULL; + virNetDevVPortProfilePtr virtPort; + int ret = -1; + int vf = -1; + int port_profile_associate = 0; + int isvf; + + /* This is only needed for PCI devices that have been defined + * using <interface type='hostdev'>. For all others, it is a NOP. + */ + if (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) + return 0; + + isvf = virHostdevIsVirtualFunction(hostdev); + if (isvf <= 0) { + 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; +} + +static virPCIDeviceListPtr +virHostdevGetPciHostDeviceList(virDomainHostdevDefPtr *hostdevs, int nhostdevs) +{ + virPCIDeviceListPtr list; + size_t i; + + if (!(list = virPCIDeviceListNew())) + return NULL; + + for (i = 0; i < nhostdevs; i++) { + virDomainHostdevDefPtr hostdev = hostdevs[i]; + virPCIDevicePtr dev; + + if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) + continue; + if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI) + continue; + + dev = virPCIDeviceNew(hostdev->source.subsys.u.pci.addr.domain, + hostdev->source.subsys.u.pci.addr.bus, + hostdev->source.subsys.u.pci.addr.slot, + hostdev->source.subsys.u.pci.addr.function); + if (!dev) { + virObjectUnref(list); + return NULL; + } + + if (virPCIDeviceListAdd(list, dev) < 0) { + virPCIDeviceFree(dev); + virObjectUnref(list); + return NULL; + } + + virPCIDeviceSetManaged(dev, hostdev->managed); + + switch (hostdev->source.subsys.u.pci.backend) { + case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_VFIO: + if (virPCIDeviceSetStubDriver(dev, "vfio-pci") < 0) { + virObjectUnref(list); + return NULL; + } + break; + + case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_KVM : + case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_DEFAULT: + if (virPCIDeviceSetStubDriver(dev, "pci-stub") < 0) { + virObjectUnref(list); + return NULL; + } + break; + } + } + + return list; +} + +bool +virHostdevHostSupportsPassthroughVFIO(void) +{ + DIR *iommuDir = NULL; + struct dirent *iommuGroup = NULL; + bool ret = false; + + /* condition 1 - /sys/kernel/iommu_groups/ contains entries */ + if (!(iommuDir = opendir("/sys/kernel/iommu_groups/"))) + goto cleanup; + + while ((iommuGroup = readdir(iommuDir))) { + /* skip ./ ../ */ + if (STRPREFIX(iommuGroup->d_name, ".")) + continue; + + /* assume we found a group */ + break; + } + + if (!iommuGroup) + goto cleanup; + /* okay, iommu is on and recognizes groups */ + + /* condition 2 - /dev/vfio/vfio exists */ + if (!virFileExists("/dev/vfio/vfio")) + goto cleanup; + + ret = true; + +cleanup: + if (iommuDir) + closedir(iommuDir); + + return ret; +} + + +#if HAVE_LINUX_KVM_H +# include <linux/kvm.h> +bool +virHostdevHostSupportsPassthroughKVM(void) +{ + int kvmfd = -1; + bool ret = false; + + if ((kvmfd = open("/dev/kvm", O_RDONLY)) < 0) + goto cleanup; + +# ifdef KVM_CAP_IOMMU + if ((ioctl(kvmfd, KVM_CHECK_EXTENSION, KVM_CAP_IOMMU)) <= 0) + goto cleanup; + + ret = true; +# endif + +cleanup: + VIR_FORCE_CLOSE(kvmfd); + + return ret; +} +#else +bool +virHostdevHostSupportsPassthroughKVM(void) +{ + return false; +} +#endif + +static bool +virHostdevPCICheckSupport(virDomainHostdevDefPtr *hostdevs, + size_t nhostdevs) +{ + bool supportsPassthroughVFIO = virHostdevHostSupportsPassthroughVFIO(); + bool supportsPassthroughKVM = virHostdevHostSupportsPassthroughKVM(); + size_t i; + + /* assign defaults for hostdev passthrough */ + for (i = 0; i < nhostdevs; i++) { + virDomainHostdevDefPtr hostdev = hostdevs[i]; + int *backend = &hostdev->source.subsys.u.pci.backend; + + if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) + continue; + if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI) + continue; + + switch ((virDomainHostdevSubsysPciBackendType) *backend) { + case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_VFIO: + if (!supportsPassthroughVFIO) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("host doesn't support VFIO PCI passthrough")); + return false; + } + break; + + case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_KVM: + if (!supportsPassthroughKVM) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", + _("host doesn't support legacy PCI passthrough")); + return false; + } + + break; + + default: + break; + } + } + + return true; +} +int +virHostdevPreparePciHostdevs(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; + + if (!nhostdevs) + return 0; + if (mgr == NULL) + return -1; + + virObjectLock(mgr->activePciHostdevs); + virObjectLock(mgr->inactivePciHostdevs); + + if (!virHostdevPCICheckSupport(hostdevs, nhostdevs)) + goto cleanup; + + if (!(pcidevs = virHostdevGetPciHostDeviceList(hostdevs, nhostdevs))) + goto cleanup; + + /* We have to use 9 loops here. *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. + */ + + /* Loop 1: validate that non-managed device isn't in use, eg + * by checking that device is either un-bound, or bound + * to stub driver + */ + + for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) { + virPCIDevicePtr dev = virPCIDeviceListGet(pcidevs, i); + virPCIDevicePtr other; + bool strict_acs_check = !!(flags & VIR_STRICT_ACS_CHECK); + + if (!virPCIDeviceIsAssignable(dev, strict_acs_check)) { + virReportError(VIR_ERR_OPERATION_INVALID, + _("PCI device %s is not assignable"), + virPCIDeviceGetName(dev)); + goto cleanup; + } + /* The device is in use by other active domain if + * the dev is in list activePciHostdevs. + */ + if ((other = virPCIDeviceListFind(mgr->activePciHostdevs, dev))) { + const char *other_drvname; + const char *other_domname; + + virPCIDeviceGetUsedBy(other, &other_drvname, &other_domname); + if (other_drvname && other_domname) + virReportError(VIR_ERR_OPERATION_INVALID, + _("PCI device %s is in use by driver %s,domain %s"), + virPCIDeviceGetName(dev), other_drvname, + other_domname); + else + virReportError(VIR_ERR_OPERATION_INVALID, + _("PCI device %s is already in use"), + virPCIDeviceGetName(dev)); + goto cleanup; + } + } + + /* Loop 2: detach managed devices */ + for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) { + virPCIDevicePtr dev = virPCIDeviceListGet(pcidevs, i); + if (virPCIDeviceGetManaged(dev) && + virPCIDeviceDetach(dev, mgr->activePciHostdevs, NULL) < 0) + goto reattachdevs; + } + + /* Loop 3: Now that all the PCI hostdevs have been detached, we + * can safely reset them */ + for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) { + virPCIDevicePtr dev = virPCIDeviceListGet(pcidevs, i); + if (virPCIDeviceReset(dev, mgr->activePciHostdevs, + mgr->inactivePciHostdevs) < 0) + goto reattachdevs; + } + + /* Loop 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 (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) + continue; + if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI) + continue; + if (hostdev->parent.type == VIR_DOMAIN_DEVICE_NET && + hostdev->parent.data.net) { + if (virHostdevNetConfigReplace(hostdev, uuid, mgr->stateDir) < 0) + goto resetvfnetconfig; + } + last_processed_hostdev_vf = i; + } + + /* Loop 5: Now mark all the devices as active */ + for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) { + virPCIDevicePtr dev = virPCIDeviceListGet(pcidevs, i); + if (virPCIDeviceListAdd(mgr->activePciHostdevs, dev) < 0) + goto inactivedevs; + } + + /* Loop 6: Now remove the devices from inactive list. */ + for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) { + virPCIDevicePtr dev = virPCIDeviceListGet(pcidevs, i); + virPCIDeviceListDel(mgr->inactivePciHostdevs, dev); + } + + /* Loop 7: Now set the used_by_domain of the device in + * driver->activePciHostdevs as domain name. + */ + for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) { + virPCIDevicePtr dev, activeDev; + + dev = virPCIDeviceListGet(pcidevs, i); + activeDev = virPCIDeviceListFind(mgr->activePciHostdevs, dev); + + if (activeDev) + virPCIDeviceSetUsedBy(activeDev, drv_name, dom_name); + } + + /* Loop 8: Now set the original states for hostdev def */ + for (i = 0; i < nhostdevs; i++) { + virPCIDevicePtr dev; + virPCIDevicePtr pcidev; + virDomainHostdevDefPtr hostdev = hostdevs[i]; + + if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) + continue; + if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI) + continue; + + dev = virPCIDeviceNew(hostdev->source.subsys.u.pci.addr.domain, + hostdev->source.subsys.u.pci.addr.bus, + hostdev->source.subsys.u.pci.addr.slot, + hostdev->source.subsys.u.pci.addr.function); + + /* original states "unbind_from_stub", "remove_slot", + * "reprobe" were already set by pciDettachDevice in + * loop 2. + */ + if ((pcidev = virPCIDeviceListFind(pcidevs, dev))) { + hostdev->origstates.states.pci.unbind_from_stub = + virPCIDeviceGetUnbindFromStub(pcidev); + hostdev->origstates.states.pci.remove_slot = + virPCIDeviceGetRemoveSlot(pcidev); + hostdev->origstates.states.pci.reprobe = + virPCIDeviceGetReprobe(pcidev); + } + + virPCIDeviceFree(dev); + } + + /* Loop 9: Now steal all the devices from pcidevs */ + while (virPCIDeviceListCount(pcidevs) > 0) + virPCIDeviceListStealIndex(pcidevs, 0); + + ret = 0; + goto cleanup; + +inactivedevs: + /* Only steal all the devices from driver->activePciHostdevs. We will + * free them in virObjectUnref(). + */ + while (virPCIDeviceListCount(pcidevs) > 0) { + virPCIDevicePtr dev = virPCIDeviceListGet(pcidevs, 0); + virPCIDeviceListSteal(mgr->activePciHostdevs, dev); + } + +resetvfnetconfig: + for (i = 0; + last_processed_hostdev_vf != -1 && i < last_processed_hostdev_vf; i++) + virHostdevNetConfigRestore(hostdevs[i], mgr->stateDir, NULL); + +reattachdevs: + for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) { + virPCIDevicePtr dev = virPCIDeviceListGet(pcidevs, i); + virPCIDeviceReattach(dev, mgr->activePciHostdevs, NULL); + } + +cleanup: + virObjectUnlock(mgr->activePciHostdevs); + virObjectUnlock(mgr->inactivePciHostdevs); + virObjectUnref(pcidevs); + return ret; +} + +static int +virHostdevFindUSBDevice(virDomainHostdevDefPtr hostdev, + bool mandatory, + virUSBDevicePtr *usb) +{ + unsigned vendor = hostdev->source.subsys.u.usb.vendor; + unsigned product = hostdev->source.subsys.u.usb.product; + unsigned bus = hostdev->source.subsys.u.usb.bus; + unsigned device = hostdev->source.subsys.u.usb.device; + bool autoAddress = hostdev->source.subsys.u.usb.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; + } + + hostdev->source.subsys.u.usb.bus = virUSBDeviceGetBus(*usb); + hostdev->source.subsys.u.usb.device = virUSBDeviceGetDevno(*usb); + hostdev->source.subsys.u.usb.autoAddress = true; + + if (autoAddress) { + VIR_INFO("USB device %x:%x found at bus:%u device:%u (moved" + " from bus:%u device:%u)", + vendor, product, + hostdev->source.subsys.u.usb.bus, + hostdev->source.subsys.u.usb.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; +} + +static int +virHostdevMarkUsbHostdevs(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 driver= %s dom=%s to activeUsbHostdevs", + virUSBDeviceGetBus(usb), virUSBDeviceGetDevno(usb), + drv_name, 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, j); + virUSBDeviceListSteal(mgr->activeUsbHostdevs, tmp); + } + virObjectUnlock(mgr->activeUsbHostdevs); + return -1; +} + +int +virHostdevPrepareUsbHostdevs(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_COLD_BOOT); + + if (!nhostdevs) + return 0; + if (mgr == NULL) + return -1; + + /* 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. + */ + 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 @name + * and add them do active list. However, if something goes + * wrong, perform rollback. + */ + if (virHostdevMarkUsbHostdevs(mgr, drv_name, dom_name, list) < 0) + goto cleanup; + + /* Loop 2: Temporary list was successfully merged with + * active 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 +virHostdevSetUnprivSGIO(virDomainDeviceDefPtr dev) +{ + virDomainHostdevDefPtr hostdev = NULL; + char *sysfs_path = NULL; + char *path = NULL; + char *hostdev_name = NULL; + char *hostdev_path = NULL; + int val = -1; + int ret = 0; + + if (dev->type != VIR_DOMAIN_DEVICE_HOSTDEV) { + hostdev = dev->data.hostdev; + + if (!hostdev->shareable || + !(hostdev->mode == VIR_DOMAIN_HOSTDEV_MODE_SUBSYS && + hostdev->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI)) + return 0; + + if (!(hostdev_name = virSCSIDeviceGetDevName(NULL, + hostdev->source.subsys.u.scsi.adapter, + hostdev->source.subsys.u.scsi.bus, + hostdev->source.subsys.u.scsi.target, + hostdev->source.subsys.u.scsi.unit))) + goto cleanup; + + if (virAsprintf(&hostdev_path, "/dev/%s", hostdev_name) < 0) + goto cleanup; + + path = hostdev_path; + } else { + return 0; + } + + sysfs_path = virGetUnprivSGIOSysfsPath(path, NULL); + if (sysfs_path == NULL) { + ret = -1; + goto cleanup; + } + + /* By default, filter the SG_IO commands, i.e. set unpriv_sgio to 0. */ + val = (hostdev->source.subsys.u.scsi.sgio == + VIR_DOMAIN_DEVICE_SGIO_UNFILTERED); + + /* Do not do anything if unpriv_sgio is not supported by the kernel and the + * whitelist is enabled. But if requesting unfiltered access, always call + * virSetDeviceUnprivSGIO, to report an error for unsupported unpriv_sgio. + */ + if ((virFileExists(sysfs_path) || val == 1) && + virSetDeviceUnprivSGIO(path, NULL, val) < 0) + ret = -1; + +cleanup: + VIR_FREE(sysfs_path); + VIR_FREE(hostdev_name); + VIR_FREE(hostdev_path); + return ret; +} + +int +virHostdevPrepareScsiHostdevs(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; + if (mgr == NULL) + return -1; + + /* Loop 1 */ + for (i = 0; i < nhostdevs; i++) { + virDomainDeviceDef dev; + + dev.type = VIR_DOMAIN_DEVICE_HOSTDEV; + dev.data.hostdev = hostdevs[i]; + + if (virHostdevSetUnprivSGIO(&dev) < 0) + return -1; + } + + /* To prevent situation where SCSI device is assigned to two domains + * we need to keep a list of currently assigned SCSI devices. + */ + if (!(list = virSCSIDeviceListNew())) + goto cleanup; + + /* Loop 2: build temporary list */ + for (i = 0; i < nhostdevs; i++) { + virDomainHostdevDefPtr hostdev = hostdevs[i]; + virSCSIDevicePtr scsi; + + if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS || + hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI) + continue; + + if (hostdev->managed) { + virReportError(VIR_ERR_XML_ERROR, "%s", + _("SCSI host device doesn't support managed mode")); + goto cleanup; + } + + if (!(scsi = virSCSIDeviceNew(NULL, + hostdev->source.subsys.u.scsi.adapter, + hostdev->source.subsys.u.scsi.bus, + hostdev->source.subsys.u.scsi.target, + hostdev->source.subsys.u.scsi.unit, + hostdev->readonly, + hostdev->shareable))) + goto cleanup; + + if (scsi && virSCSIDeviceListAdd(list, scsi) < 0) { + virSCSIDeviceFree(scsi); + goto cleanup; + } + } + + /* Loop 3: Mark devices in temporary list as used by @drv_name & @dom_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, j); + virSCSIDeviceListSteal(mgr->activeScsiHostdevs, tmp); + } + virObjectUnlock(mgr->activeScsiHostdevs); +cleanup: + virObjectUnref(list); + return -1; +} + +int +virHostdevPrepareDomainHostdevs(virHostdevManagerPtr mgr, + const char *driver, + virDomainDefPtr def, + unsigned int flags) +{ + if (!def->nhostdevs) + return 0; + + if (mgr == NULL) + return -1; + + if (flags & VIR_SP_PCI_HOSTDEV) { + if (virHostdevPreparePciHostdevs(mgr, driver, + def->name, def->uuid, + def->hostdevs, + def->nhostdevs, + flags) < 0) + return -1; + } + + if (flags & VIR_SP_USB_HOSTDEV) { + if (virHostdevPrepareUsbHostdevs(mgr, driver, def->name, + def->hostdevs, def->nhostdevs, + flags) < 0) + return -1; + } + + if (flags & VIR_SP_SCSI_HOSTDEV) { + if (virHostdevPrepareScsiHostdevs(mgr, driver, def->name, + def->hostdevs, def->nhostdevs) < 0) + return -1; + } + + return 0; +} + +/* + * Pre-condition: mgr->inactivePciHostdevs & mgr->activePciHostdevs + * are locked + */ +static void +virHostdevReAttachPciDevice(virHostdevManagerPtr mgr, virPCIDevicePtr dev) +{ + /* If the device is not managed and was attached to guest + * successfully, it must have been inactive. + */ + if (!virPCIDeviceGetManaged(dev)) { + if (virPCIDeviceListAdd(mgr->inactivePciHostdevs, dev) < 0) + virPCIDeviceFree(dev); + return; + } + + /* Wait for device cleanup if it is qemu/kvm */ + if (STREQ(virPCIDeviceGetStubDriver(dev), "pci-stub")) { + int retries = 100; + while (virPCIDeviceWaitForCleanup(dev, "kvm_assigned_device") + && retries) { + usleep(100*1000); + retries--; + } + } + + if (virPCIDeviceReattach(dev, mgr->activePciHostdevs, + mgr->inactivePciHostdevs) < 0) { + virErrorPtr err = virGetLastError(); + VIR_ERROR(_("Failed to re-attach PCI device: %s"), + err ? err->message : _("unknown error")); + virResetError(err); + } + virPCIDeviceFree(dev); +} + +/* + * Pre-condition: mgr->activePciHostdevs is locked + */ +static virPCIDeviceListPtr +virHostdevGetActivePciHostDeviceList(virHostdevManagerPtr mgr, + virDomainHostdevDefPtr *hostdevs, + int nhostdevs) +{ + virPCIDeviceListPtr list; + size_t i; + + if (!(list = virPCIDeviceListNew())) + return NULL; + + for (i = 0; i < nhostdevs; i++) { + virDomainHostdevDefPtr hostdev = hostdevs[i]; + virPCIDevicePtr dev; + virPCIDevicePtr activeDev; + + if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) + continue; + if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI) + continue; + + dev = virPCIDeviceNew(hostdev->source.subsys.u.pci.addr.domain, + hostdev->source.subsys.u.pci.addr.bus, + hostdev->source.subsys.u.pci.addr.slot, + hostdev->source.subsys.u.pci.addr.function); + if (!dev) { + virObjectUnref(list); + return NULL; + } + + if ((activeDev = virPCIDeviceListFind(mgr->activePciHostdevs, dev))) { + if (virPCIDeviceListAdd(list, activeDev) < 0) { + virPCIDeviceFree(dev); + virObjectUnref(list); + return NULL; + } + } + + virPCIDeviceFree(dev); + } + + return list; +} + +int +virHostdevUpdateActivePciHostdevs(virHostdevManagerPtr mgr, + virDomainHostdevDefPtr *hostdevs, + int nhostdevs, + const char *drv_name, + const char *dom_name) +{ + virDomainHostdevDefPtr hostdev = NULL; + virPCIDevicePtr dev = NULL; + size_t i; + int ret = -1; + + if (!nhostdevs) + return 0; + + if (!mgr) + return -1; + + virObjectLock(mgr->activePciHostdevs); + virObjectLock(mgr->inactivePciHostdevs); + + for (i = 0; i < nhostdevs; i++) { + hostdev = hostdevs[i]; + + if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) + continue; + if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI) + continue; + + dev = virPCIDeviceNew(hostdev->source.subsys.u.pci.addr.domain, + hostdev->source.subsys.u.pci.addr.bus, + hostdev->source.subsys.u.pci.addr.slot, + hostdev->source.subsys.u.pci.addr.function); + + if (!dev) + goto cleanup; + + virPCIDeviceSetManaged(dev, hostdev->managed); + switch (hostdev->source.subsys.u.pci.backend) { + case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_VFIO: + if (virPCIDeviceSetStubDriver(dev, "vfio-pci") < 0) + goto cleanup; + break; + + case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_KVM : + case VIR_DOMAIN_HOSTDEV_PCI_BACKEND_DEFAULT: + if (virPCIDeviceSetStubDriver(dev, "pci-stub") < 0) + goto cleanup; + break; + } + virPCIDeviceSetUsedBy(dev, drv_name, dom_name); + + /* Setup the original states for the PCI device */ + virPCIDeviceSetUnbindFromStub(dev, hostdev->origstates.states.pci.unbind_from_stub); + virPCIDeviceSetRemoveSlot(dev, hostdev->origstates.states.pci.remove_slot); + virPCIDeviceSetReprobe(dev, hostdev->origstates.states.pci.reprobe); + + if (virPCIDeviceListAdd(mgr->activePciHostdevs, dev) < 0) + goto cleanup; + dev = NULL; + } + + ret = 0; +cleanup: + virPCIDeviceFree(dev); + virObjectUnlock(mgr->activePciHostdevs); + virObjectUnlock(mgr->inactivePciHostdevs); + return ret; +} + + +int +virHostdevUpdateActiveUsbHostdevs(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; + + if (!mgr) + return -1; + + virObjectLock(mgr->activeUsbHostdevs); + for (i = 0; i < nhostdevs; i++) { + virUSBDevicePtr usb = NULL; + hostdev = hostdevs[i]; + + if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) + continue; + if (hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB) + continue; + + usb = virUSBDeviceNew(hostdev->source.subsys.u.usb.bus, + hostdev->source.subsys.u.usb.device, + NULL); + if (!usb) { + VIR_WARN("Unable to reattach USB device %03d.%03d " + "on driver %s domain %s", + hostdev->source.subsys.u.usb.bus, + hostdev->source.subsys.u.usb.device, + drv_name, 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; +} + +int +virHostdevUpdateActiveScsiHostdevs(virHostdevManagerPtr mgr, + virDomainHostdevDefPtr *hostdevs, + int nhostdevs, + const char *drv_name, + const char *dom_name) +{ + virDomainHostdevDefPtr hostdev = NULL; + size_t i; + int ret = -1; + virSCSIDevicePtr scsi = NULL; + virSCSIDevicePtr tmp = NULL; + + if (!nhostdevs) + return 0; + + if (!mgr) + return -1; + + virObjectLock(mgr->activeScsiHostdevs); + for (i = 0; i < nhostdevs; i++) { + hostdev = hostdevs[i]; + + if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS || + hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI) + continue; + + if (!(scsi = virSCSIDeviceNew(NULL, + hostdev->source.subsys.u.scsi.adapter, + hostdev->source.subsys.u.scsi.bus, + hostdev->source.subsys.u.scsi.target, + hostdev->source.subsys.u.scsi.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: + virObjectUnlock(mgr->activeScsiHostdevs); + return ret; +} + +int +virHostdevUpdateActiveHostdevs(virHostdevManagerPtr mgr, + const char *driver, + virDomainDefPtr def, + unsigned int flags) +{ + if (!def->nhostdevs) + return 0; + + if (flags & VIR_SP_PCI_HOSTDEV) { + if (virHostdevUpdateActivePciHostdevs(mgr, + def->hostdevs, + def->nhostdevs, + driver, def->name) < 0) + return -1; + } + + if (flags & VIR_SP_USB_HOSTDEV) { + if (virHostdevUpdateActiveUsbHostdevs(mgr, + def->hostdevs, + def->nhostdevs, + driver, def->name) < 0) + return -1; + } + + if (flags & VIR_SP_SCSI_HOSTDEV) { + if (virHostdevUpdateActiveScsiHostdevs(mgr, + def->hostdevs, + def->nhostdevs, + driver, def->name) < 0) + return -1; + } + + return 0; +} + + +void +virHostdevReAttachPciHostdevs(virHostdevManagerPtr mgr, + const char *drv_name, + const char *dom_name, + virDomainHostdevDefPtr *hostdevs, + int nhostdevs) +{ + virPCIDeviceListPtr pcidevs; + size_t i; + char *oldStateDir = NULL; + + if (!nhostdevs || !mgr) + return; + + virObjectLock(mgr->activePciHostdevs); + virObjectLock(mgr->inactivePciHostdevs); + + /* for upgrade, if netconfig file is not found in mgr->stateDir, + * find in old state dir */ + if (VIR_STRDUP(oldStateDir, QEMU_STATE_DIR) < 0) + goto cleanup; + + if (!(pcidevs = virHostdevGetActivePciHostDeviceList(mgr, + hostdevs, + nhostdevs))) { + virErrorPtr err = virGetLastError(); + VIR_ERROR(_("Failed to allocate PCI device list: %s"), + err ? err->message : _("unknown error")); + virResetError(err); + goto cleanup; + } + + /* Again 4 loops; mark all devices as inactive before reset + * them and reset all the devices before re-attach. + * Attach mac and port profile parameters to devices + */ + for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) { + virPCIDevicePtr dev = virPCIDeviceListGet(pcidevs, i); + virPCIDevicePtr activeDev = NULL; + const char *usedby_drvname; + const char *usedby_domname; + + /* Never delete the dev from list driver->activePciHostdevs + * if it's used by other domain. + */ + activeDev = virPCIDeviceListFind(mgr->activePciHostdevs, dev); + if (activeDev) { + virPCIDeviceGetUsedBy(activeDev, &usedby_drvname, &usedby_domname); + if (STRNEQ_NULLABLE(drv_name, usedby_drvname) || + STRNEQ_NULLABLE(dom_name, usedby_domname)) { + virPCIDeviceListSteal(pcidevs, dev); + continue; + } + } + + virPCIDeviceListSteal(mgr->activePciHostdevs, dev); + } + + /* + * For SRIOV net host devices, unset mac and port profile before + * reset and reattach device + */ + for (i = 0; i < nhostdevs; i++) + virHostdevNetConfigRestore(hostdevs[i], mgr->stateDir, oldStateDir); + + for (i = 0; i < virPCIDeviceListCount(pcidevs); i++) { + virPCIDevicePtr dev = virPCIDeviceListGet(pcidevs, i); + if (virPCIDeviceReset(dev, mgr->activePciHostdevs, + mgr->inactivePciHostdevs) < 0) { + virErrorPtr err = virGetLastError(); + VIR_ERROR(_("Failed to reset PCI device: %s"), + err ? err->message : _("unknown error")); + virResetError(err); + } + } + + while (virPCIDeviceListCount(pcidevs) > 0) { + virPCIDevicePtr dev = virPCIDeviceListStealIndex(pcidevs, 0); + virHostdevReAttachPciDevice(mgr, dev); + } + + virObjectUnref(pcidevs); +cleanup: + VIR_FREE(oldStateDir); + virObjectUnlock(mgr->activePciHostdevs); + virObjectUnlock(mgr->inactivePciHostdevs); +} + +void +virHostdevReAttachUsbHostdevs(virHostdevManagerPtr mgr, + const char *drv_name, + const char *dom_name, + virDomainHostdevDefPtr *hostdevs, + int nhostdevs) +{ + size_t i; + + if (!nhostdevs || !mgr) + return; + + virObjectLock(mgr->activeUsbHostdevs); + for (i = 0; i < nhostdevs; i++) { + virDomainHostdevDefPtr hostdev = hostdevs[i]; + 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; + + usb = virUSBDeviceNew(hostdev->source.subsys.u.usb.bus, + hostdev->source.subsys.u.usb.device, + NULL); + + if (!usb) { + VIR_WARN("Unable to reattach USB device %03d.%03d " + "on driver %s domain %s", + hostdev->source.subsys.u.usb.bus, + hostdev->source.subsys.u.usb.device, + drv_name, dom_name); + continue; + } + + /* Delete only those USB devices which belongs + * to domain. Therefore we want to steal only + * those devices from the list which were taken + * by domain */ + + tmp = virUSBDeviceListFind(mgr->activeUsbHostdevs, usb); + virUSBDeviceFree(usb); + + if (!tmp) { + VIR_WARN("Unable to find device %03d.%03d " + "in list of active USB devices", + hostdev->source.subsys.u.usb.bus, + hostdev->source.subsys.u.usb.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:%s", + hostdev->source.subsys.u.usb.bus, + hostdev->source.subsys.u.usb.device, + drv_name, dom_name); + virUSBDeviceListDel(mgr->activeUsbHostdevs, tmp); + } + + } + + virObjectUnlock(mgr->activeUsbHostdevs); +} + +void +virHostdevReAttachScsiHostdevs(virHostdevManagerPtr mgr, + const char *drv_name, + const char *dom_name, + virDomainHostdevDefPtr *hostdevs, + int nhostdevs) +{ + size_t i; + + if (!nhostdevs || !mgr) + return; + + virObjectLock(mgr->activeScsiHostdevs); + for (i = 0; i < nhostdevs; i++) { + virDomainHostdevDefPtr hostdev = hostdevs[i]; + virSCSIDevicePtr scsi; + virSCSIDevicePtr tmp; + + if (hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS || + hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_SCSI) + continue; + + if (!(scsi = virSCSIDeviceNew(NULL, + hostdev->source.subsys.u.scsi.adapter, + hostdev->source.subsys.u.scsi.bus, + hostdev->source.subsys.u.scsi.target, + hostdev->source.subsys.u.scsi.unit, + hostdev->readonly, + hostdev->shareable))) { + VIR_WARN("Unable to reattach SCSI device %s:%d:%d:%d on driver %s, " + "domain %s", + hostdev->source.subsys.u.scsi.adapter, + hostdev->source.subsys.u.scsi.bus, + hostdev->source.subsys.u.scsi.target, + hostdev->source.subsys.u.scsi.unit, + drv_name, dom_name); + continue; + } + + /* Only delete the devices which are marked as being used by @name, + * because qemuProcessStart could fail on the half way. */ + + if (!(tmp = virSCSIDeviceListFind(mgr->activeScsiHostdevs, scsi))) { + VIR_WARN("Unable to find device %s:%d:%d:%d " + "in list of active SCSI devices", + hostdev->source.subsys.u.scsi.adapter, + hostdev->source.subsys.u.scsi.bus, + hostdev->source.subsys.u.scsi.target, + hostdev->source.subsys.u.scsi.unit); + virSCSIDeviceFree(scsi); + continue; + } + + VIR_DEBUG("Removing %s:%d:%d:%d drv= %s dom=%s from activeScsiHostdevs", + hostdev->source.subsys.u.scsi.adapter, + hostdev->source.subsys.u.scsi.bus, + hostdev->source.subsys.u.scsi.target, + hostdev->source.subsys.u.scsi.unit, + drv_name, dom_name); + + virSCSIDeviceListDel(mgr->activeScsiHostdevs, tmp, drv_name, dom_name); + virSCSIDeviceFree(scsi); + } + + virObjectUnlock(mgr->activeScsiHostdevs); +} + +void +virHostdevReAttachDomainHostdevs(virHostdevManagerPtr mgr, + const char *driver, + virDomainDefPtr def, + unsigned int flags) +{ + if (!def->nhostdevs || !mgr) + return; + + if (flags & VIR_SP_PCI_HOSTDEV) { + virHostdevReAttachPciHostdevs(mgr, driver, def->name, + def->hostdevs, def->nhostdevs); + } + + if (flags & VIR_SP_USB_HOSTDEV) { + virHostdevReAttachUsbHostdevs(mgr, driver, def->name, + def->hostdevs, def->nhostdevs); + } + + if (flags & VIR_SP_SCSI_HOSTDEV) { + virHostdevReAttachScsiHostdevs(mgr, driver, def->name, + def->hostdevs, def->nhostdevs); + } +} + +/* following functions are used by NodeDevDetach/Reattach/Reset */ +int +virHostdevPciNodeDeviceDetach(virHostdevManagerPtr mgr, + virPCIDevicePtr pci) +{ + int ret; + + if (!mgr || !pci) + return -1; + + virObjectLock(mgr->activePciHostdevs); + virObjectLock(mgr->inactivePciHostdevs); + if (virPCIDeviceDetach(pci, mgr->activePciHostdevs, + mgr->inactivePciHostdevs) < 0) + ret = -1; + else + ret = 0; + + virObjectUnlock(mgr->inactivePciHostdevs); + virObjectUnlock(mgr->activePciHostdevs); + return ret; +} + +int +virHostdevPciNodeDeviceReAttach(virHostdevManagerPtr mgr, + virPCIDevicePtr pci) +{ + int ret = -1; + virPCIDevicePtr other; + + if (!mgr || !pci) + return -1; + + virObjectLock(mgr->activePciHostdevs); + virObjectLock(mgr->inactivePciHostdevs); + other = virPCIDeviceListFind(mgr->activePciHostdevs, pci); + if (other) { + const char *other_drvname; + const char *other_domname; + + virPCIDeviceGetUsedBy(other, &other_drvname, &other_domname); + if (other_drvname && other_domname) + virReportError(VIR_ERR_OPERATION_INVALID, + _("PCI device %s is still in use by driver %s, domain %s"), + virPCIDeviceGetName(pci), other_drvname, other_domname); + else + virReportError(VIR_ERR_OPERATION_INVALID, + _("PCI device %s is still in use"), + virPCIDeviceGetName(pci)); + goto out; + } + + virPCIDeviceReattachInit(pci); + + if (virPCIDeviceReattach(pci, mgr->activePciHostdevs, + mgr->inactivePciHostdevs) < 0) + goto out; + + ret = 0; +out: + virObjectUnlock(mgr->inactivePciHostdevs); + virObjectUnlock(mgr->activePciHostdevs); + return ret; +} + +int +virHostdevPciNodeDeviceReset(virHostdevManagerPtr mgr, + virPCIDevicePtr pci) +{ + int ret; + + if (!mgr || !pci) + return -1; + + virObjectLock(mgr->activePciHostdevs); + virObjectLock(mgr->inactivePciHostdevs); + if (virPCIDeviceReset(pci, mgr->activePciHostdevs, + mgr->inactivePciHostdevs) < 0) + ret = -1; + else + ret = 0; + + virObjectUnlock(mgr->inactivePciHostdevs); + virObjectUnlock(mgr->activePciHostdevs); + return ret; +} diff --git a/src/util/virhostdev.h b/src/util/virhostdev.h new file mode 100644 index 0000000..e4b5b86 --- /dev/null +++ b/src/util/virhostdev.h @@ -0,0 +1,134 @@ +/* virhostdev.h: hostdev management + * + * Copyright (C) 2014 SUSE LINUX Products GmbH, Nuernberg, Germany. + * Copyright (C) 2006-2007, 2009-2014 Red Hat, Inc. + * Copyright (C) 2006 Daniel P. Berrange + * + * 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: Chunyan Liu <cyliu(a)suse.com&gt; + * Author: Daniel P. Berrange <berrange(a)redhat.com&gt; + */ + +#ifndef __VIR_HOSTDEV_H__ +# define __VIR_HOSTDEV_H__ + +# include "internal.h" + +# include "domain_conf.h" +# include "virpci.h" +# include "virusb.h" +# include "virscsi.h" + +typedef enum { + VIR_SP_PCI_HOSTDEV = (1 << 0), /* support pci passthrough */ + VIR_SP_USB_HOSTDEV = (1 << 1), /* support usb passthrough */ + VIR_SP_SCSI_HOSTDEV = (1 << 2), /* support scsi passthrough */ + + VIR_COLD_BOOT = (1 << 8), /* cold boot */ + VIR_STRICT_ACS_CHECK = (1 << 9), /* strict acs check */ +} virHostdevManagerFlag; + +typedef struct _virHostdevManager virHostdevManager; +typedef virHostdevManager *virHostdevManagerPtr; +struct _virHostdevManager{ + char *stateDir; + + virPCIDeviceListPtr activePciHostdevs; + virPCIDeviceListPtr inactivePciHostdevs; + virUSBDeviceListPtr activeUsbHostdevs; + virSCSIDeviceListPtr activeScsiHostdevs; +}; + +virHostdevManagerPtr virHostdevManagerGetDefault(void); + +bool virHostdevHostSupportsPassthroughVFIO(void); +bool virHostdevHostSupportsPassthroughKVM(void); + +/* functions used to prepare/unprepare hostdevs for domain */ +int virHostdevPrepareDomainHostdevs(virHostdevManagerPtr mgr, + const char *driver, + virDomainDefPtr def, + unsigned int flags); +void virHostdevReAttachDomainHostdevs(virHostdevManagerPtr mgr, + const char *driver, + virDomainDefPtr def, + unsigned int flags); +int virHostdevPreparePciHostdevs(virHostdevManagerPtr mgr, + const char *drv_name, + const char *dom_name, + const unsigned char *uuid, + virDomainHostdevDefPtr *hostdevs, + int nhostdevs, + unsigned int flags); +int virHostdevPrepareUsbHostdevs(virHostdevManagerPtr mgr, + const char *drv_name, + const char *dom_name, + virDomainHostdevDefPtr *hostdevs, + int nhostdevs, + unsigned int flags); +int virHostdevPrepareScsiHostdevs(virHostdevManagerPtr mgr, + const char *drv_name, + const char *dom_name, + virDomainHostdevDefPtr *hostdevs, + int nhostdevs); +void virHostdevReAttachPciHostdevs(virHostdevManagerPtr mgr, + const char *drv_name, + const char *dom_name, + virDomainHostdevDefPtr *hostdevs, + int nhostdevs); +void virHostdevReAttachUsbHostdevs(virHostdevManagerPtr mgr, + const char *drv_name, + const char *dom_name, + virDomainHostdevDefPtr *hostdevs, + int nhostdevs); +void virHostdevReAttachScsiHostdevs(virHostdevManagerPtr mgr, + const char *drv_name, + const char *dom_name, + virDomainHostdevDefPtr *hostdevs, + int nhostdevs); +int +virHostdevUpdateActivePciHostdevs(virHostdevManagerPtr mgr, + virDomainHostdevDefPtr *hostdevs, + int nhostdevs, + const char *drv_name, + const char *dom_name); +int +virHostdevUpdateActiveUsbHostdevs(virHostdevManagerPtr mgr, + virDomainHostdevDefPtr *hostdevs, + int nhostdevs, + const char *drv_name, + const char *dom_name); +int +virHostdevUpdateActiveScsiHostdevs(virHostdevManagerPtr mgr, + virDomainHostdevDefPtr *hostdevs, + int nhostdevs, + const char *drv_name, + const char *dom_name); +int +virHostdevUpdateActiveHostdevs(virHostdevManagerPtr mgr, + const char *driver, + virDomainDefPtr def, + unsigned int flags); + +/* functions used by NodeDevDetach/Reattach/Reset */ +int virHostdevPciNodeDeviceDetach(virHostdevManagerPtr mgr, + virPCIDevicePtr pci); +int virHostdevPciNodeDeviceReAttach(virHostdevManagerPtr mgr, + virPCIDevicePtr pci); +int virHostdevPciNodeDeviceReset(virHostdevManagerPtr mgr, + virPCIDevicePtr pci); + +#endif /* __VIR_HOSTDEV_H__ */