On 01/25/2016 11:21 AM, Andrea Bolognani wrote:
> This ensures the behavior for detach is consistent, no matter how it
> was triggered (eg. 'virsh nodedev-detach', 'virsh attach-device' or
> startup of a domain that is configured to use hostdevs).
> ---
> src/util/virhostdev.c | 28 ++++++++++++++++++++++++++--
> 1 file changed, 26 insertions(+), 2 deletions(-)
>
> diff --git a/src/util/virhostdev.c b/src/util/virhostdev.c
> index 6f14574..5ded1e9 100644
> --- a/src/util/virhostdev.c
> +++ b/src/util/virhostdev.c
> @@ -1646,6 +1646,19 @@ virHostdevReAttachSCSIDevices(virHostdevManagerPtr hostdev_mgr,
> virObjectUnlock(hostdev_mgr->activeSCSIHostdevs);
> }
>
> +/**
> + * virHostdevPCINodeDeviceDetach:
> + * @hostdev_mgr: hostdev manager
> + * @pci: PCI device
A new PCI device to be detach from the host
IOW: Not currently on some active/inactive list, right?
Seems reasonable otherwise though.
John
> + *
> + * Detach a specific PCI device from the host.
> + *
> + * This function makes sure the device is not in use before detaching it
> + * from the host; if the device has already been detached from the host,
> + * the operation is considered successful.
> + *
> + * Returns: 0 on success, <0 on failure
> + */
> int
> virHostdevPCINodeDeviceDetach(virHostdevManagerPtr hostdev_mgr,
> virPCIDevicePtr pci)
> @@ -1660,11 +1673,22 @@ virHostdevPCINodeDeviceDetach(virHostdevManagerPtr hostdev_mgr,
> if (virHostdevIsPCINodeDeviceUsed(virPCIDeviceGetAddress(pci), &data))
> goto out;
>
> - if (virPCIDeviceDetach(pci, hostdev_mgr->activePCIHostdevs,
> - hostdev_mgr->inactivePCIHostdevs) < 0) {
> + /* We want this function to be idempotent, so if the device has already
> + * been added to the inactive list (and is not active, as per the check
> + * above) just return right away */
> + if (virPCIDeviceListFind(hostdev_mgr->inactivePCIHostdevs, pci)) {
> + VIR_DEBUG("PCI device %s is already detached from the host",
> + virPCIDeviceGetName(pci));
> + ret = 0;
> goto out;
> }
>
> + /* Detach the device. We don't want to skip unmanaged devices in
> + * this case, because the user explicitly asked for the device to
> + * be detached from the host driver */
> + if (virHostdevOnlyDetachPCIDevice(hostdev_mgr, pci, false) < 0)
> + goto out;
> +
> ret = 0;
> out:
> virObjectUnlock(hostdev_mgr->inactivePCIHostdevs);
>
--
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