[libvirt] [PATCH 02/17] qemu: Introduce qemuDomainDeviceDefSkipController
John Ferlan
jferlan at redhat.com
Tue Dec 5 01:38:52 UTC 2017
In order to be able to reuse some code for both controller def
validation and command line building, create a convenience helper
that will perform the "skip" avoidance checks. It will also set
some flags to allow the caller to specifically skip (or fail)
depending on the result of the flag (as opposed to building up
some ever growing list of variables).
Signed-off-by: John Ferlan <jferlan at redhat.com>
---
src/qemu/qemu_command.c | 61 +++++------------------------------
src/qemu/qemu_domain.c | 84 ++++++++++++++++++++++++++++++++++++++++++++++++-
src/qemu/qemu_domain.h | 12 +++++++
3 files changed, 102 insertions(+), 55 deletions(-)
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index 6a8da1d58..5a6a671a1 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -3180,8 +3180,8 @@ qemuBuildControllerDevCommandLine(virCommandPtr cmd,
virQEMUCapsPtr qemuCaps)
{
size_t i, j;
+ unsigned int flags = 0;
int usbcontroller = 0;
- bool usblegacy = false;
int contOrder[] = {
/*
* List of controller types that we add commandline args for,
@@ -3216,61 +3216,14 @@ qemuBuildControllerDevCommandLine(virCommandPtr cmd,
if (cont->type != contOrder[j])
continue;
- /* skip USB controllers with type none.*/
- if (cont->type == VIR_DOMAIN_CONTROLLER_TYPE_USB &&
- cont->model == VIR_DOMAIN_CONTROLLER_MODEL_USB_NONE) {
- usbcontroller = -1; /* mark we don't want a controller */
- continue;
- }
-
- /* skip pcie-root */
- if (cont->type == VIR_DOMAIN_CONTROLLER_TYPE_PCI &&
- cont->model == VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT) {
- continue;
- }
+ if (qemuDomainDeviceDefSkipController(cont, def, &flags)) {
+ /* mark we don't want a controller */
+ if (flags & QEMU_DOMAIN_DEVICE_SKIP_USB_CONTROLLER_FLAG)
+ usbcontroller = -1;
- /* Skip pci-root, except for pSeries guests (which actually
- * support more than one PCI Host Bridge per guest) */
- if (!qemuDomainIsPSeries(def) &&
- cont->type == VIR_DOMAIN_CONTROLLER_TYPE_PCI &&
- cont->model == VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT) {
- continue;
- }
-
- /* first SATA controller on Q35 machines is implicit */
- if (cont->type == VIR_DOMAIN_CONTROLLER_TYPE_SATA &&
- cont->idx == 0 && qemuDomainIsQ35(def))
- continue;
-
- /* first IDE controller is implicit on various machines */
- if (cont->type == VIR_DOMAIN_CONTROLLER_TYPE_IDE &&
- cont->idx == 0 && qemuDomainHasBuiltinIDE(def))
- continue;
-
- if (cont->type == VIR_DOMAIN_CONTROLLER_TYPE_USB &&
- cont->model == -1 &&
- !qemuDomainIsQ35(def) &&
- !qemuDomainIsVirt(def)) {
-
- /* An appropriate default USB controller model should already
- * have been selected in qemuDomainDeviceDefPostParse(); if
- * we still have no model by now, we have to fall back to the
- * legacy USB controller.
- *
- * Note that we *don't* want to end up with the legacy USB
- * controller for q35 and virt machines, so we go ahead and
- * fail in qemuBuildControllerDevStr(); on the other hand,
- * for s390 machines we want to ignore any USB controller
- * (see 548ba43028 for the full story), so we skip
- * qemuBuildControllerDevStr() but we don't ultimately end
- * up adding the legacy USB controller */
- if (usblegacy) {
- virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
- _("Multiple legacy USB controllers are "
- "not supported"));
+ if (flags & QEMU_DOMAIN_DEVICE_SKIP_USB_LEGACY_FAIL_FLAG)
goto cleanup;
- }
- usblegacy = true;
+
continue;
}
diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 569bbd29e..d4c7674c0 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -3884,10 +3884,92 @@ qemuDomainDeviceDefValidateDisk(const virDomainDiskDef *disk)
}
+/**
+ * qemuDomainDeviceDefSkipController:
+ * @controller: Controller to check
+ * @def: Domain definition
+ * @flags: qemuDomainDeviceSkipFlags to set if specific condition found
+ *
+ * Returns true if this controller can be skipped for command line generation
+ * or device validation
+ */
+bool
+qemuDomainDeviceDefSkipController(const virDomainControllerDef *controller,
+ const virDomainDef *def,
+ unsigned int *flags)
+{
+ /* skip USB controllers with type none.*/
+ if (controller->type == VIR_DOMAIN_CONTROLLER_TYPE_USB &&
+ controller->model == VIR_DOMAIN_CONTROLLER_MODEL_USB_NONE) {
+ *flags |= QEMU_DOMAIN_DEVICE_SKIP_USB_CONTROLLER_FLAG;
+ return true;
+ }
+
+ /* skip pcie-root */
+ if (controller->type == VIR_DOMAIN_CONTROLLER_TYPE_PCI &&
+ controller->model == VIR_DOMAIN_CONTROLLER_MODEL_PCIE_ROOT)
+ return true;
+
+ /* Skip pci-root, except for pSeries guests (which actually
+ * support more than one PCI Host Bridge per guest) */
+ if (!qemuDomainIsPSeries(def) &&
+ controller->type == VIR_DOMAIN_CONTROLLER_TYPE_PCI &&
+ controller->model == VIR_DOMAIN_CONTROLLER_MODEL_PCI_ROOT)
+ return true;
+
+ /* first SATA controller on Q35 machines is implicit */
+ if (controller->type == VIR_DOMAIN_CONTROLLER_TYPE_SATA &&
+ controller->idx == 0 && qemuDomainIsQ35(def))
+ return true;
+
+ /* first IDE controller is implicit on various machines */
+ if (controller->type == VIR_DOMAIN_CONTROLLER_TYPE_IDE &&
+ controller->idx == 0 && qemuDomainHasBuiltinIDE(def))
+ return true;
+
+ if (controller->type == VIR_DOMAIN_CONTROLLER_TYPE_USB &&
+ controller->model == -1 &&
+ !qemuDomainIsQ35(def) &&
+ !qemuDomainIsVirt(def)) {
+
+ /* An appropriate default USB controller model should already
+ * have been selected in qemuDomainDeviceDefPostParse(); if
+ * we still have no model by now, we have to fall back to the
+ * legacy USB controller.
+ *
+ * Note that we *don't* want to end up with the legacy USB
+ * controller for q35 and virt machines, so we go ahead and
+ * fail in qemuBuildControllerDevStr(); on the other hand,
+ * for s390 machines we want to ignore any USB controller
+ * (see 548ba43028 for the full story), so we skip
+ * qemuBuildControllerDevStr() but we don't ultimately end
+ * up adding the legacy USB controller */
+ if (*flags & QEMU_DOMAIN_DEVICE_SKIP_USB_LEGACY_FLAG) {
+ virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+ _("Multiple legacy USB controllers are "
+ "not supported"));
+ *flags |= QEMU_DOMAIN_DEVICE_SKIP_USB_LEGACY_FAIL_FLAG;
+ }
+ *flags |= QEMU_DOMAIN_DEVICE_SKIP_USB_LEGACY_FLAG;
+ return true;
+ }
+
+ return false;
+}
+
+
static int
qemuDomainDeviceDefValidateController(const virDomainControllerDef *controller,
- const virDomainDef *def ATTRIBUTE_UNUSED)
+ const virDomainDef *def)
{
+ unsigned int flags = 0;
+
+ if (qemuDomainDeviceDefSkipController(controller, def, &flags))
+ return 0;
+
+ if (flags & QEMU_DOMAIN_DEVICE_SKIP_USB_LEGACY_FAIL_FLAG)
+ return -1;
+
switch ((virDomainControllerType) controller->type) {
case VIR_DOMAIN_CONTROLLER_TYPE_IDE:
case VIR_DOMAIN_CONTROLLER_TYPE_FDC:
diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
index c33af3671..5c9c55d38 100644
--- a/src/qemu/qemu_domain.h
+++ b/src/qemu/qemu_domain.h
@@ -999,4 +999,16 @@ qemuDomainPrepareDiskSource(virConnectPtr conn,
qemuDomainObjPrivatePtr priv,
virQEMUDriverConfigPtr cfg);
+typedef enum {
+ QEMU_DOMAIN_DEVICE_SKIP_USB_CONTROLLER_FLAG = (1 << 0),
+ QEMU_DOMAIN_DEVICE_SKIP_USB_LEGACY_FLAG = (1 << 1),
+ QEMU_DOMAIN_DEVICE_SKIP_USB_LEGACY_FAIL_FLAG = (1 << 2),
+} qemuDomainDeviceSkipFlags;
+
+bool
+qemuDomainDeviceDefSkipController(const virDomainControllerDef *controller,
+ const virDomainDef *def,
+ unsigned int *flags);
+
+
#endif /* __QEMU_DOMAIN_H__ */
--
2.13.6
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