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Fix reset of cgroup when detaching USB device from LXC guests

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When detaching a USB device from an LXC guest we must remove
the device from the cgroup ACL. Unfortunately we were telling
the cgroup code to use the guest /dev path, not the host /dev
path, and the guest device node had already been unlinked.
This was, however, fortunate since the code passed &priv->cgroup
instead of priv->cgroup, so would have crash if the device node
were accessible.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
(cherry picked from commit 2c2bec94d27ccd070bee18a6113b1cfea6d80126)
This commit is contained in:
Daniel P. Berrange 2014-02-04 17:41:22 +00:00
parent 5ef86f4114
commit b272b572cc
1 changed files with 2 additions and 2 deletions
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4
src/lxc/lxc_driver.c
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@ -3912,7 +3912,7 @@ lxcDomainDetachDeviceHostdevUSBLive(virLXCDriverPtr driver,
}
if (!(usb = virUSBDeviceNew(def->source.subsys.u.usb.bus,
def->source.subsys.u.usb.device, vroot)))
def->source.subsys.u.usb.device, NULL)))
goto cleanup;
VIR_DEBUG("Unlinking %s", dst);
@ -3926,7 +3926,7 @@ lxcDomainDetachDeviceHostdevUSBLive(virLXCDriverPtr driver,
if (virUSBDeviceFileIterate(usb,
virLXCTeardownHostUsbDeviceCgroup,
&priv->cgroup) < 0)
priv->cgroup) < 0)
VIR_WARN("cannot deny device %s for domain %s",
dst, vm->def->name);