[libvirt] [PATCH v2 3/9] hostdev: Use common reattach code in virHostdevPCINodeDeviceReAttach()
This ensures the behavior for reattach is consistent, no matter how it
was triggered (eg. 'virsh nodedev-reattach', 'virsh detach-device' or
shutdown of a domain that is configured to use hostdevs).
---
src/util/virhostdev.c | 33 ++++++++++++++++++++++++++++++---
1 file changed, 30 insertions(+), 3 deletions(-)
diff --git a/src/util/virhostdev.c b/src/util/virhostdev.c
index 586937e..f40d636 100644
--- a/src/util/virhostdev.c
+++ b/src/util/virhostdev.c
@@ -1637,10 +1637,24 @@ virHostdevPCINodeDeviceDetach(virHostdevManagerPtr hostdev_mgr,
return ret;
}
+/**
+ * virHostdevPCINodeDeviceReAttach:
+ * @hostdev_mgr: hostdev manager
+ * @pci: PCI device
+ *
+ * Reattach a specific PCI device to the host.
+ *
+ * This function makes sure the device is not in use before reattaching it
+ * to the host; if the device has already been reattached to the host, the
+ * operation is considered successful.
+ *
+ * Returns: 0 on success, <0 on failure
+ */
int
virHostdevPCINodeDeviceReAttach(virHostdevManagerPtr hostdev_mgr,
virPCIDevicePtr pci)
{
+ virPCIDevicePtr actual;
struct virHostdevIsPCINodeDeviceUsedData data = {hostdev_mgr, NULL,
false};
int ret = -1;
@@ -1651,10 +1665,23 @@ virHostdevPCINodeDeviceReAttach(virHostdevManagerPtr hostdev_mgr,
if (virHostdevIsPCINodeDeviceUsed(virPCIDeviceGetAddress(pci), &data))
goto out;
- virPCIDeviceReattachInit(pci);
+ /* We want this function to be idempotent, so if the device has already
+ * been removed from the inactive list (and is not active either, as
+ * per the check above) just return right away. We also need to retrieve
+ * the actual device from the inactive list because that's the one that
+ * contains state information such as the stub driver */
+ if (!(actual = virPCIDeviceListFind(hostdev_mgr->inactivePCIHostdevs,
+ pci))) {
+ VIR_DEBUG("PCI device %s is already attached to the host",
+ virPCIDeviceGetName(pci));
+ ret = 0;
+ goto out;
+ }
- if (virPCIDeviceReattach(pci, hostdev_mgr->activePCIHostdevs,
- hostdev_mgr->inactivePCIHostdevs) < 0)
+ /* Reattach the device. We don't want to skip unmanaged devices in
+ * this case, because the user explicitly asked for the device to
+ * be reattached to the host driver */
+ if (virHostdevOnlyReattachPCIDevice(hostdev_mgr, actual, false) < 0)
goto out;
ret = 0;
--
2.5.0