[libvirt] [PATCH v3 10/18] qemu: set/use proper pciConnectFlags during hotplug
Laine Stump
laine at laine.org
Tue Sep 20 19:14:16 UTC 2016
Before now, all the qemu hotplug functions assumed that all devices to
be hotplugged were legacy PCI endpoint devices
(VIR_PCI_CONNECT_TYPE_PCI_DEVICE). This worked out "okay", because all
devices *are* legacy PCI endpoint devices on x86/440fx machinetypes,
and hotplug didn't work properly on machinetypes using PCIe anyway
(hotplugging onto a legacy PCI slot doesn't work, and until commit
b87703cf any attempt to manually specify a PCIe address for a
hotplugged device would be erroneously rejected).
This patch makes all qemu hotplug operations honor the pciConnectFlags
set by the single all-knowing function
qemuDomainDeviceConnectFlagsInternal(). This is done in 3 steps, but
in a single commit since we would have to touch the other points at
each step anyway:
1) add a flags argument to the hypervisor-agnostic
virDomainPCIAddressEnsureAddr() (previously it hardcoded
..._PCI_DEVICE)
2) add a new qemu-specific function qemuDomainEnsurePCIAddress() which
gets the correct pciConnectFlags for the device from
qemuDomainDeviceConnectFlags(), then calls
virDomainPCIAddressEnsureAddr().
3) in qemu_hotplug.c replace all calls to
virDomainPCIAddressEnsureAddr() with calls to
qemuDomainEnsurePCIAddress()
So in effect, we're putting a "shim" on top of all calls to
virDomainPCIAddressEnsureAddr() that sets the right pciConnectFlags.
---
src/conf/domain_addr.c | 16 ++++++++--------
src/conf/domain_addr.h | 3 ++-
src/qemu/qemu_domain_address.c | 27 +++++++++++++++++++++++++++
src/qemu/qemu_domain_address.h | 4 ++++
src/qemu/qemu_hotplug.c | 25 +++++++++++++++++--------
5 files changed, 58 insertions(+), 17 deletions(-)
diff --git a/src/conf/domain_addr.c b/src/conf/domain_addr.c
index be42f15..12b5cb2 100644
--- a/src/conf/domain_addr.c
+++ b/src/conf/domain_addr.c
@@ -485,17 +485,17 @@ virDomainPCIAddressReserveSlot(virDomainPCIAddressSetPtr addrs,
int
virDomainPCIAddressEnsureAddr(virDomainPCIAddressSetPtr addrs,
- virDomainDeviceInfoPtr dev)
+ virDomainDeviceInfoPtr dev,
+ virDomainPCIConnectFlags flags)
{
int ret = -1;
char *addrStr = NULL;
- /* Flags should be set according to the particular device,
- * but only the caller knows the type of device. Currently this
- * function is only used for hot-plug, though, and hot-plug is
- * only supported for standard PCI devices, so we can safely use
- * the setting below */
- virDomainPCIConnectFlags flags = (VIR_PCI_CONNECT_HOTPLUGGABLE |
- VIR_PCI_CONNECT_TYPE_PCI_DEVICE);
+
+ /* if pciConnectFlags is 0, the particular model of this device
+ * on this machinetype doesn't need a PCI address, so we're done.
+ */
+ if (!flags)
+ return 0;
if (!(addrStr = virDomainPCIAddressAsString(&dev->addr.pci)))
goto cleanup;
diff --git a/src/conf/domain_addr.h b/src/conf/domain_addr.h
index 4d6d12a..92ee04c 100644
--- a/src/conf/domain_addr.h
+++ b/src/conf/domain_addr.h
@@ -144,7 +144,8 @@ int virDomainPCIAddressReserveSlot(virDomainPCIAddressSetPtr addrs,
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
int virDomainPCIAddressEnsureAddr(virDomainPCIAddressSetPtr addrs,
- virDomainDeviceInfoPtr dev)
+ virDomainDeviceInfoPtr dev,
+ virDomainPCIConnectFlags flags)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
int virDomainPCIAddressReleaseAddr(virDomainPCIAddressSetPtr addrs,
diff --git a/src/qemu/qemu_domain_address.c b/src/qemu/qemu_domain_address.c
index ed728f5..d811540 100644
--- a/src/qemu/qemu_domain_address.c
+++ b/src/qemu/qemu_domain_address.c
@@ -2032,6 +2032,33 @@ qemuDomainAssignAddresses(virDomainDefPtr def,
return 0;
}
+/**
+ * qemuDomainEnsurePCIAddress:
+ *
+ * if @dev should have a PCI address but doesn't, assign
+ * an address on a compatible PCI bus. Validate that any
+ * existing address is on a compatible bus.
+ *
+ * @obj: the virDomainObjPtr for the domain. This will include
+ * qemuCaps and address cache (if there is one)
+ *
+ * @dev: the device that we need to ensure has a PCI address
+ *
+ * returns 0 on success (and any new address set in dev->...info) -1
+ * on failure.
+ */
+int
+qemuDomainEnsurePCIAddress(virDomainObjPtr obj,
+ virDomainDeviceDefPtr dev)
+{
+ qemuDomainObjPrivatePtr priv = obj->privateData;
+ virDomainDeviceInfoPtr info = virDomainDeviceGetInfo(dev);
+
+ qemuDomainDeviceConnectFlags(obj->def, dev, priv->qemuCaps);
+
+ return virDomainPCIAddressEnsureAddr(priv->pciaddrs, info,
+ info->pciConnectFlags);
+}
void
qemuDomainReleaseDeviceAddress(virDomainObjPtr vm,
diff --git a/src/qemu/qemu_domain_address.h b/src/qemu/qemu_domain_address.h
index 11d6e92..800859c 100644
--- a/src/qemu/qemu_domain_address.h
+++ b/src/qemu/qemu_domain_address.h
@@ -37,6 +37,10 @@ int qemuDomainAssignAddresses(virDomainDefPtr def,
bool newDomain)
ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
+int qemuDomainEnsurePCIAddress(virDomainObjPtr obj,
+ virDomainDeviceDefPtr dev)
+ ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
+
void qemuDomainReleaseDeviceAddress(virDomainObjPtr vm,
virDomainDeviceInfoPtr info,
const char *devstr);
diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index 72dd93b..cee6f5c 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -304,6 +304,7 @@ qemuDomainAttachVirtioDiskDevice(virConnectPtr conn,
int ret = -1;
int rv;
qemuDomainObjPrivatePtr priv = vm->privateData;
+ virDomainDeviceDef dev = { VIR_DOMAIN_DEVICE_DISK, { .disk = disk } };
virErrorPtr orig_err;
char *devstr = NULL;
char *drivestr = NULL;
@@ -344,7 +345,7 @@ qemuDomainAttachVirtioDiskDevice(virConnectPtr conn,
goto error;
} else if (!disk->info.type ||
disk->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) {
- if (virDomainPCIAddressEnsureAddr(priv->pciaddrs, &disk->info) < 0)
+ if (qemuDomainEnsurePCIAddress(vm, &dev) < 0)
goto error;
}
releaseaddr = true;
@@ -462,6 +463,8 @@ int qemuDomainAttachControllerDevice(virQEMUDriverPtr driver,
const char* type = virDomainControllerTypeToString(controller->type);
char *devstr = NULL;
qemuDomainObjPrivatePtr priv = vm->privateData;
+ virDomainDeviceDef dev = { VIR_DOMAIN_DEVICE_CONTROLLER,
+ { .controller = controller } };
virDomainCCWAddressSetPtr ccwaddrs = NULL;
bool releaseaddr = false;
@@ -501,7 +504,7 @@ int qemuDomainAttachControllerDevice(virQEMUDriverPtr driver,
if (controller->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE ||
controller->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) {
- if (virDomainPCIAddressEnsureAddr(priv->pciaddrs, &controller->info) < 0)
+ if (qemuDomainEnsurePCIAddress(vm, &dev) < 0)
goto cleanup;
} else if (controller->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW) {
if (!(ccwaddrs = qemuDomainCCWAddrSetCreateFromDomain(vm->def)))
@@ -914,6 +917,7 @@ qemuDomainAttachNetDevice(virQEMUDriverPtr driver,
virDomainNetDefPtr net)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
+ virDomainDeviceDef dev = { VIR_DOMAIN_DEVICE_NET, { .net = net } };
char **tapfdName = NULL;
int *tapfd = NULL;
size_t tapfdSize = 0;
@@ -1077,7 +1081,7 @@ qemuDomainAttachNetDevice(virQEMUDriverPtr driver,
virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
_("virtio-s390 net device cannot be hotplugged."));
goto cleanup;
- } else if (virDomainPCIAddressEnsureAddr(priv->pciaddrs, &net->info) < 0) {
+ } else if (qemuDomainEnsurePCIAddress(vm, &dev) < 0) {
goto cleanup;
}
@@ -1287,6 +1291,8 @@ qemuDomainAttachHostPCIDevice(virQEMUDriverPtr driver,
virDomainHostdevDefPtr hostdev)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
+ virDomainDeviceDef dev = { VIR_DOMAIN_DEVICE_HOSTDEV,
+ { .hostdev = hostdev } };
int ret;
char *devstr = NULL;
int configfd = -1;
@@ -1357,7 +1363,7 @@ qemuDomainAttachHostPCIDevice(virQEMUDriverPtr driver,
if (qemuAssignDeviceHostdevAlias(vm->def, &hostdev->info->alias, -1) < 0)
goto error;
- if (virDomainPCIAddressEnsureAddr(priv->pciaddrs, hostdev->info) < 0)
+ if (qemuDomainEnsurePCIAddress(vm, &dev) < 0)
goto error;
releaseaddr = true;
if (backend != VIR_DOMAIN_HOSTDEV_PCI_BACKEND_VFIO &&
@@ -1584,10 +1590,12 @@ qemuDomainChrRemove(virDomainDefPtr vmdef,
}
static int
-qemuDomainAttachChrDeviceAssignAddr(virDomainDefPtr def,
+qemuDomainAttachChrDeviceAssignAddr(virDomainObjPtr vm,
qemuDomainObjPrivatePtr priv,
virDomainChrDefPtr chr)
{
+ virDomainDefPtr def = vm->def;
+ virDomainDeviceDef dev = { VIR_DOMAIN_DEVICE_CHR, { .chr = chr } };
int ret = -1;
virDomainVirtioSerialAddrSetPtr vioaddrs = NULL;
@@ -1603,7 +1611,7 @@ qemuDomainAttachChrDeviceAssignAddr(virDomainDefPtr def,
} else if (chr->deviceType == VIR_DOMAIN_CHR_DEVICE_TYPE_SERIAL &&
chr->targetType == VIR_DOMAIN_CHR_SERIAL_TARGET_TYPE_PCI) {
- if (virDomainPCIAddressEnsureAddr(priv->pciaddrs, &chr->info) < 0)
+ if (qemuDomainEnsurePCIAddress(vm, &dev) < 0)
goto cleanup;
ret = 1;
@@ -1663,7 +1671,7 @@ int qemuDomainAttachChrDevice(virQEMUDriverPtr driver,
if (qemuAssignDeviceChrAlias(vmdef, chr, -1) < 0)
goto cleanup;
- if ((rc = qemuDomainAttachChrDeviceAssignAddr(vm->def, priv, chr)) < 0)
+ if ((rc = qemuDomainAttachChrDeviceAssignAddr(vm, priv, chr)) < 0)
goto cleanup;
if (rc == 1)
need_release = true;
@@ -1749,6 +1757,7 @@ qemuDomainAttachRNGDevice(virQEMUDriverPtr driver,
virDomainRNGDefPtr rng)
{
qemuDomainObjPrivatePtr priv = vm->privateData;
+ virDomainDeviceDef dev = { VIR_DOMAIN_DEVICE_RNG, { .rng = rng } };
virErrorPtr orig_err;
char *devstr = NULL;
char *charAlias = NULL;
@@ -1785,7 +1794,7 @@ qemuDomainAttachRNGDevice(virQEMUDriverPtr driver,
if (rng->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_NONE ||
rng->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_PCI) {
- if (virDomainPCIAddressEnsureAddr(priv->pciaddrs, &rng->info) < 0)
+ if (qemuDomainEnsurePCIAddress(vm, &dev) < 0)
return -1;
} else if (rng->info.type == VIR_DOMAIN_DEVICE_ADDRESS_TYPE_CCW) {
if (!(ccwaddrs = qemuDomainCCWAddrSetCreateFromDomain(vm->def)))
--
2.7.4
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