[libvirt] [PATCH 10/34] conf: Assume at least 1 maximum and current vCPU for every conf

[Peter Krempa]

Set new domain configs to contain at least 1 vCPU add a check that
maximum vCPU count isn't set to 0 and remove unnecesary checks.

The openvz test suite change is necessary since the test case generates
the config via virDomainDefNew but does not set the vCPU info. With the
change to virDomainDefNew the expected output has changed.
---
 src/conf/domain_conf.c     | 12 ++++++++++++
 src/lxc/lxc_native.c       |  7 -------
 src/openvz/openvz_driver.c | 20 ++++++++------------
 src/qemu/qemu_command.c    |  3 ---
 src/vmx/vmx.c              |  6 +++---
 tests/openvzutilstest.c    |  2 +-
 6 files changed, 24 insertions(+), 26 deletions(-)

diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 3a1dcc7..6b16430 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -1428,6 +1428,12 @@ int
 virDomainDefSetVCpusMax(virDomainDefPtr def,
                         unsigned int vcpus)
 {
+    if (vcpus == 0) {
+        virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
+                       _("domain config can't have 0 maximum vCPUs"));
+        return -1;
+    }
+
     if (vcpus < def->vcpus)
         def->vcpus = vcpus;

@@ -2697,6 +2703,12 @@ virDomainDefNew(void)
     if (!(ret->numa = virDomainNumaNew()))
         goto error;

+    /* assume at least 1 cpu for every config */
+    if (virDomainDefSetVCpusMax(ret, 1) < 0)
+        goto error;
+
+    ret->vcpus = 1;
+
     ret->mem.hard_limit = VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
     ret->mem.soft_limit = VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
     ret->mem.swap_hard_limit = VIR_DOMAIN_MEMORY_PARAM_UNLIMITED;
diff --git a/src/lxc/lxc_native.c b/src/lxc/lxc_native.c
index d4a72c1..a3fea0a 100644
--- a/src/lxc/lxc_native.c
+++ b/src/lxc/lxc_native.c
@@ -1017,13 +1017,6 @@ lxcParseConfigString(const char *config)
     vmdef->onPoweroff = VIR_DOMAIN_LIFECYCLE_DESTROY;
     vmdef->virtType = VIR_DOMAIN_VIRT_LXC;

-    /* Value not handled by the LXC driver, setting to
-     * minimum required to make XML parsing pass */
-    if (virDomainDefSetVCpusMax(vmdef, 1) < 0)
-        goto error;
-
-    vmdef->vcpus = 1;
-
     vmdef->nfss = 0;
     vmdef->os.type = VIR_DOMAIN_OSTYPE_EXE;

diff --git a/src/openvz/openvz_driver.c b/src/openvz/openvz_driver.c
index 1361432..53a2d57 100644
--- a/src/openvz/openvz_driver.c
+++ b/src/openvz/openvz_driver.c
@@ -1035,12 +1035,10 @@ openvzDomainDefineXMLFlags(virConnectPtr conn, const char *xml, unsigned int fla
                        _("current vcpu count must equal maximum"));
         goto cleanup;
     }
-    if (vm->def->maxvcpus > 0) {
-        if (openvzDomainSetVcpusInternal(vm, vm->def->maxvcpus) < 0) {
-            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("Could not set number of vCPUs"));
-             goto cleanup;
-        }
+    if (openvzDomainSetVcpusInternal(vm, vm->def->maxvcpus) < 0) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("Could not set number of vCPUs"));
+         goto cleanup;
     }

     if (vm->def->mem.cur_balloon > 0) {
@@ -1133,12 +1131,10 @@ openvzDomainCreateXML(virConnectPtr conn, const char *xml,
     vm->def->id = vm->pid;
     virDomainObjSetState(vm, VIR_DOMAIN_RUNNING, VIR_DOMAIN_RUNNING_BOOTED);

-    if (vm->def->maxvcpus > 0) {
-        if (openvzDomainSetVcpusInternal(vm, vm->def->maxvcpus) < 0) {
-            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("Could not set number of vCPUs"));
-            goto cleanup;
-        }
+    if (openvzDomainSetVcpusInternal(vm, vm->def->maxvcpus) < 0) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("Could not set number of vCPUs"));
+        goto cleanup;
     }

     dom = virGetDomain(conn, vm->def->name, vm->def->uuid);
diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
index ef44b8e..cc6785f 100644
--- a/src/qemu/qemu_command.c
+++ b/src/qemu/qemu_command.c
@@ -12694,9 +12694,6 @@ qemuParseCommandLine(virCapsPtr qemuCaps,
     def->id = -1;
     def->mem.cur_balloon = 64 * 1024;
     virDomainDefSetMemoryTotal(def, def->mem.cur_balloon);
-    if (virDomainDefSetVCpusMax(def, 1) < 0)
-        goto error;
-    def->vcpus = 1;
     def->clock.offset = VIR_DOMAIN_CLOCK_OFFSET_UTC;

     def->onReboot = VIR_DOMAIN_LIFECYCLE_RESTART;
diff --git a/src/vmx/vmx.c b/src/vmx/vmx.c
index 5456e3d..0223e94 100644
--- a/src/vmx/vmx.c
+++ b/src/vmx/vmx.c
@@ -3181,10 +3181,10 @@ virVMXFormatConfig(virVMXContext *ctx, virDomainXMLOptionPtr xmlopt, virDomainDe
                          "'current'"));
         goto cleanup;
     }
-    if (def->maxvcpus <= 0 || (def->maxvcpus % 2 != 0 && def->maxvcpus != 1)) {
+    if ((def->maxvcpus % 2 != 0 && def->maxvcpus != 1)) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("Expecting domain XML entry 'vcpu' to be an unsigned "
-                         "integer (1 or a multiple of 2) but found %d"),
+                       _("Expecting domain XML entry 'vcpu' to be 1 or a "
+                         "multiple of 2 but found %d"),
                        def->maxvcpus);
         goto cleanup;
     }
diff --git a/tests/openvzutilstest.c b/tests/openvzutilstest.c
index 1414d70..0214fe5 100644
--- a/tests/openvzutilstest.c
+++ b/tests/openvzutilstest.c
@@ -81,7 +81,7 @@ testReadNetworkConf(const void *data ATTRIBUTE_UNUSED)
         "  <uuid>00000000-0000-0000-0000-000000000000</uuid>\n"
         "  <memory unit='KiB'>0</memory>\n"
         "  <currentMemory unit='KiB'>0</currentMemory>\n"
-        "  <vcpu placement='static'>0</vcpu>\n"
+        "  <vcpu placement='static'>1</vcpu>\n"
         "  <os>\n"
         "    <type>exe</type>\n"
         "    <init>/sbin/init</init>\n"
-- 
2.6.2