mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2025-02-22 03:12:22 +00:00
Add support for hotplug/unplug of USB host devices in LXC
Wire up the attach/detach device drivers in LXC to support the hotplug/unplug of USB host devices. Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
This commit is contained in:
Daniel P. Berrange
parent
af7ab7fc5d
commit
ed77abc58b
@ -39,6 +39,7 @@
|
||||
#include "virterror_internal.h"
|
||||
#include "logging.h"
|
||||
#include "datatypes.h"
|
||||
#include "lxc_cgroup.h"
|
||||
#include "lxc_conf.h"
|
||||
#include "lxc_container.h"
|
||||
#include "lxc_domain.h"
|
||||
@ -3353,6 +3354,174 @@ cleanup:
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
lxcDomainAttachDeviceHostdevSubsysUSBLive(virLXCDriverPtr driver,
|
||||
virDomainObjPtr vm,
|
||||
virDomainDeviceDefPtr dev)
|
||||
{
|
||||
virLXCDomainObjPrivatePtr priv = vm->privateData;
|
||||
virDomainHostdevDefPtr def = dev->data.hostdev;
|
||||
int ret = -1;
|
||||
char *vroot = NULL;
|
||||
char *src = NULL;
|
||||
char *dstdir = NULL;
|
||||
char *dstfile = NULL;
|
||||
struct stat sb;
|
||||
mode_t mode;
|
||||
bool created = false;
|
||||
usbDevice *usb = NULL;
|
||||
virCgroupPtr group = NULL;
|
||||
|
||||
if (virDomainHostdevFind(vm->def, def, NULL) >= 0) {
|
||||
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
|
||||
_("host USB device already exists"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (virAsprintf(&vroot, "/proc/%llu/root",
|
||||
(unsigned long long)priv->initpid) < 0) {
|
||||
virReportOOMError();
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
if (virAsprintf(&dstdir, "%s/dev/bus/%03d",
|
||||
vroot,
|
||||
def->source.subsys.u.usb.bus) < 0) {
|
||||
virReportOOMError();
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
if (virAsprintf(&dstfile, "%s/%03d",
|
||||
dstdir,
|
||||
def->source.subsys.u.usb.device) < 0) {
|
||||
virReportOOMError();
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
if (virAsprintf(&src, "/dev/bus/usb/%03d/%03d",
|
||||
def->source.subsys.u.usb.bus,
|
||||
def->source.subsys.u.usb.device) < 0) {
|
||||
virReportOOMError();
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
if (!lxcCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_DEVICES)) {
|
||||
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
|
||||
_("devices cgroup isn't mounted"));
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
if (virCgroupForDomain(driver->cgroup, vm->def->name, &group, 0) != 0) {
|
||||
virReportError(VIR_ERR_INTERNAL_ERROR,
|
||||
_("cannot find cgroup for domain %s"), vm->def->name);
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
if (!(usb = usbGetDevice(def->source.subsys.u.usb.bus,
|
||||
def->source.subsys.u.usb.device, vroot)))
|
||||
goto cleanup;
|
||||
|
||||
if (stat(src, &sb) < 0) {
|
||||
virReportSystemError(errno,
|
||||
_("Unable to access %s"), src);
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
if (!S_ISCHR(sb.st_mode)) {
|
||||
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
|
||||
_("USB source %s was not a character device"),
|
||||
src);
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
mode = 0700 | S_IFCHR;
|
||||
|
||||
if (virFileMakePath(dstdir) < 0) {
|
||||
virReportSystemError(errno,
|
||||
_("Unable to create %s"), dstdir);
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
VIR_DEBUG("Creating dev %s (%d,%d)",
|
||||
dstfile, major(sb.st_rdev), minor(sb.st_rdev));
|
||||
if (mknod(dstfile, mode, sb.st_rdev) < 0) {
|
||||
virReportSystemError(errno,
|
||||
_("Unable to create device %s"),
|
||||
dstfile);
|
||||
goto cleanup;
|
||||
}
|
||||
created = true;
|
||||
|
||||
if (virSecurityManagerSetHostdevLabel(driver->securityManager,
|
||||
vm->def, def, vroot) < 0)
|
||||
goto cleanup;
|
||||
|
||||
if (usbDeviceFileIterate(usb,
|
||||
virLXCSetupHostUsbDeviceCgroup,
|
||||
&group) < 0)
|
||||
goto cleanup;
|
||||
|
||||
ret = 0;
|
||||
|
||||
cleanup:
|
||||
virDomainAuditHostdev(vm, def, "attach", ret == 0);
|
||||
if (ret < 0 && created)
|
||||
unlink(dstfile);
|
||||
|
||||
usbFreeDevice(usb);
|
||||
virCgroupFree(&group);
|
||||
VIR_FREE(src);
|
||||
VIR_FREE(dstfile);
|
||||
VIR_FREE(dstdir);
|
||||
VIR_FREE(vroot);
|
||||
return ret;
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
lxcDomainAttachDeviceHostdevSubsysLive(virLXCDriverPtr driver,
|
||||
virDomainObjPtr vm,
|
||||
virDomainDeviceDefPtr dev)
|
||||
{
|
||||
switch (dev->data.hostdev->source.subsys.type) {
|
||||
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB:
|
||||
return lxcDomainAttachDeviceHostdevSubsysUSBLive(driver, vm, dev);
|
||||
|
||||
default:
|
||||
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
|
||||
_("Unsupported host device type %s"),
|
||||
virDomainHostdevSubsysTypeToString(dev->data.hostdev->source.subsys.type));
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
lxcDomainAttachDeviceHostdevLive(virLXCDriverPtr driver,
|
||||
virDomainObjPtr vm,
|
||||
virDomainDeviceDefPtr dev)
|
||||
{
|
||||
virLXCDomainObjPrivatePtr priv = vm->privateData;
|
||||
|
||||
if (!priv->initpid) {
|
||||
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
|
||||
_("Cannot attach hostdev until init PID is known"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
switch (dev->data.hostdev->mode) {
|
||||
case VIR_DOMAIN_HOSTDEV_MODE_SUBSYS:
|
||||
return lxcDomainAttachDeviceHostdevSubsysLive(driver, vm, dev);
|
||||
|
||||
default:
|
||||
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
|
||||
_("Unsupported host device mode %s"),
|
||||
virDomainHostdevModeTypeToString(dev->data.hostdev->mode));
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
lxcDomainAttachDeviceLive(virConnectPtr conn,
|
||||
virLXCDriverPtr driver,
|
||||
@ -3375,6 +3544,12 @@ lxcDomainAttachDeviceLive(virConnectPtr conn,
|
||||
dev->data.net = NULL;
|
||||
break;
|
||||
|
||||
case VIR_DOMAIN_DEVICE_HOSTDEV:
|
||||
ret = lxcDomainAttachDeviceHostdevLive(driver, vm, dev);
|
||||
if (!ret)
|
||||
dev->data.disk = NULL;
|
||||
break;
|
||||
|
||||
default:
|
||||
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
|
||||
_("device type '%s' cannot be attached"),
|
||||
@ -3523,6 +3698,130 @@ cleanup:
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
lxcDomainDetachDeviceHostdevUSBLive(virLXCDriverPtr driver,
|
||||
virDomainObjPtr vm,
|
||||
virDomainDeviceDefPtr dev)
|
||||
{
|
||||
virLXCDomainObjPrivatePtr priv = vm->privateData;
|
||||
virDomainHostdevDefPtr def = NULL;
|
||||
virCgroupPtr group = NULL;
|
||||
int idx, ret = -1;
|
||||
char *dst;
|
||||
char *vroot;
|
||||
usbDevice *usb = NULL;
|
||||
|
||||
if ((idx = virDomainHostdevFind(vm->def,
|
||||
dev->data.hostdev,
|
||||
&def)) < 0) {
|
||||
virReportError(VIR_ERR_OPERATION_FAILED, "%s",
|
||||
_("usb device not found"));
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
if (virAsprintf(&vroot, "/proc/%llu/root",
|
||||
(unsigned long long)priv->initpid) < 0) {
|
||||
virReportOOMError();
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
if (virAsprintf(&dst, "%s/dev/bus/usb/%03d/%03d",
|
||||
vroot,
|
||||
def->source.subsys.u.usb.bus,
|
||||
def->source.subsys.u.usb.device) < 0) {
|
||||
virReportOOMError();
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
if (!lxcCgroupControllerActive(driver, VIR_CGROUP_CONTROLLER_DEVICES)) {
|
||||
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
|
||||
_("devices cgroup isn't mounted"));
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
if (virCgroupForDomain(driver->cgroup, vm->def->name, &group, 0) != 0) {
|
||||
virReportError(VIR_ERR_INTERNAL_ERROR,
|
||||
_("cannot find cgroup for domain %s"), vm->def->name);
|
||||
goto cleanup;
|
||||
}
|
||||
|
||||
if (!(usb = usbGetDevice(def->source.subsys.u.usb.bus,
|
||||
def->source.subsys.u.usb.device, vroot)))
|
||||
goto cleanup;
|
||||
|
||||
VIR_DEBUG("Unlinking %s", dst);
|
||||
if (unlink(dst) < 0 && errno != ENOENT) {
|
||||
virDomainAuditHostdev(vm, def, "detach", false);
|
||||
virReportSystemError(errno,
|
||||
_("Unable to remove device %s"), dst);
|
||||
goto cleanup;
|
||||
}
|
||||
virDomainAuditHostdev(vm, def, "detach", true);
|
||||
|
||||
if (usbDeviceFileIterate(usb,
|
||||
virLXCTeardownHostUsbDeviceCgroup,
|
||||
&group) < 0)
|
||||
VIR_WARN("cannot deny device %s for domain %s",
|
||||
dst, vm->def->name);
|
||||
|
||||
usbDeviceListDel(driver->activeUsbHostdevs, usb);
|
||||
|
||||
virDomainHostdevRemove(vm->def, idx);
|
||||
virDomainHostdevDefFree(def);
|
||||
|
||||
ret = 0;
|
||||
|
||||
cleanup:
|
||||
usbFreeDevice(usb);
|
||||
VIR_FREE(dst);
|
||||
virCgroupFree(&group);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int
|
||||
lxcDomainDetachDeviceHostdevSubsysLive(virLXCDriverPtr driver,
|
||||
virDomainObjPtr vm,
|
||||
virDomainDeviceDefPtr dev)
|
||||
{
|
||||
switch (dev->data.hostdev->source.subsys.type) {
|
||||
case VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_USB:
|
||||
return lxcDomainDetachDeviceHostdevUSBLive(driver, vm, dev);
|
||||
|
||||
default:
|
||||
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
|
||||
_("Unsupported host device type %s"),
|
||||
virDomainHostdevSubsysTypeToString(dev->data.hostdev->source.subsys.type));
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
lxcDomainDetachDeviceHostdevLive(virLXCDriverPtr driver,
|
||||
virDomainObjPtr vm,
|
||||
virDomainDeviceDefPtr dev)
|
||||
{
|
||||
virLXCDomainObjPrivatePtr priv = vm->privateData;
|
||||
|
||||
if (!priv->initpid) {
|
||||
virReportError(VIR_ERR_OPERATION_INVALID, "%s",
|
||||
_("Cannot attach hostdev until init PID is known"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
switch (dev->data.hostdev->mode) {
|
||||
case VIR_DOMAIN_HOSTDEV_MODE_SUBSYS:
|
||||
return lxcDomainDetachDeviceHostdevSubsysLive(driver, vm, dev);
|
||||
|
||||
default:
|
||||
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
|
||||
_("Unsupported host device mode %s"),
|
||||
virDomainHostdevModeTypeToString(dev->data.hostdev->mode));
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
lxcDomainDetachDeviceLive(virLXCDriverPtr driver,
|
||||
virDomainObjPtr vm,
|
||||
@ -3539,6 +3838,10 @@ lxcDomainDetachDeviceLive(virLXCDriverPtr driver,
|
||||
ret = lxcDomainDetachDeviceNetLive(vm, dev);
|
||||
break;
|
||||
|
||||
case VIR_DOMAIN_DEVICE_HOSTDEV:
|
||||
ret = lxcDomainDetachDeviceHostdevLive(driver, vm, dev);
|
||||
break;
|
||||
|
||||
default:
|
||||
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
|
||||
_("device type '%s' cannot be detached"),
|
||||
|
||||
Loading…
x
Reference in New Issue
Block a user