[libvirt] [PATCH v3 01/13] Release address in function granularity than slot

[Shivaprasad G Bhat]

The commit 6fe678c is partly reverted. The code is moved around and cant revert
staright. Doing this at function level is necessary because some devices
may not be removed by guest or may take time and new hotplug shouldn't assume
the slot is free just because one of the function was freed by the guest.

Signed-off-by: Shivaprasad G Bhat <sbhat at linux.vnet.ibm.com>
---
 src/conf/domain_addr.c         |   22 +++++++++-------------
 src/libvirt_private.syms       |    1 +
 src/qemu/qemu_domain_address.c |    2 +-
 3 files changed, 11 insertions(+), 14 deletions(-)

diff --git a/src/conf/domain_addr.c b/src/conf/domain_addr.c
index acd8ce6..35c7cd4 100644
--- a/src/conf/domain_addr.c
+++ b/src/conf/domain_addr.c
@@ -472,21 +472,17 @@ virDomainPCIAddressEnsureAddr(virDomainPCIAddressSetPtr addrs,
         goto cleanup;
 
     if (dev->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) {
-        /* We do not support hotplug multi-function PCI device now, so we should
-         * reserve the whole slot. The function of the PCI device must be 0.
-         */
-        if (dev->addr.pci.function != 0) {
-            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("Only PCI device addresses with function=0"
-                             " are supported"));
-            goto cleanup;
-        }
+        if (((dev->addr.pci.function == 0) && (dev->addr.pci.multi == VIR_TRISTATE_SWITCH_ON)) ||
+            dev->addr.pci.function != 0) {
 
-        if (!virDomainPCIAddressValidate(addrs, &dev->addr.pci,
-                                         addrStr, flags, true))
-            goto cleanup;
+            if (!virDomainPCIAddressValidate(addrs, &dev->addr.pci,
+                                             addrStr, flags, true))
+                goto cleanup;
 
-        ret = virDomainPCIAddressReserveSlot(addrs, &dev->addr.pci, flags);
+            ret = virDomainPCIAddressReserveAddr(addrs, &dev->addr.pci, flags, false, true);
+        } else {
+            ret = virDomainPCIAddressReserveSlot(addrs, &dev->addr.pci, flags);
+        }
     } else {
         ret = virDomainPCIAddressReserveNextSlot(addrs, dev, flags);
     }
diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index fb24808..e4953b7 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -98,6 +98,7 @@ virDomainPCIAddressBusSetModel;
 virDomainPCIAddressEnsureAddr;
 virDomainPCIAddressFlagsCompatible;
 virDomainPCIAddressGetNextSlot;
+virDomainPCIAddressReleaseAddr;
 virDomainPCIAddressReleaseSlot;
 virDomainPCIAddressReserveAddr;
 virDomainPCIAddressReserveNextSlot;
diff --git a/src/qemu/qemu_domain_address.c b/src/qemu/qemu_domain_address.c
index 9c8c262..1e7d98c 100644
--- a/src/qemu/qemu_domain_address.c
+++ b/src/qemu/qemu_domain_address.c
@@ -1682,7 +1682,7 @@ qemuDomainReleaseDeviceAddress(virDomainObjPtr vm,
                  NULLSTR(devstr));
     else if (info->type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI &&
              virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_DEVICE) &&
-             virDomainPCIAddressReleaseSlot(priv->pciaddrs,
+             virDomainPCIAddressReleaseAddr(priv->pciaddrs,
                                             &info->addr.pci) < 0)
         VIR_WARN("Unable to release PCI address on %s",
                  NULLSTR(devstr));