libvirt/foo/docs/api_extension/0009-support-all-flags-in-test-driver.patch

From 6c9e6b956453d0f0c4ff542ef8a184d663a39266 Mon Sep 17 00:00:00 2001
From: Eric Blake <eblake@redhat.com>
Date: Mon, 4 Oct 2010 17:01:12 -0600
Subject: [PATCH 09/15] vcpu: support all flags in test driver

* src/test/test_driver.c (testDomainGetVcpusFlags)
(testDomainSetVcpusFlags): Support all flags.
(testDomainUpdateVCPUs): Update cpu count here.
---
 src/test/test_driver.c |  128 ++++++++++++++++++++++++++++++++++++++++-------
 1 files changed, 109 insertions(+), 19 deletions(-)

diff --git a/src/test/test_driver.c b/src/test/test_driver.c
index b70c80d..a9d3d89 100644
--- a/src/test/test_driver.c
+++ b/src/test/test_driver.c
@@ -450,6 +450,7 @@ testDomainUpdateVCPUs(virConnectPtr conn,
                 goto cleanup;
     }

+    dom->def->vcpus = nvcpus;
     ret = 0;
 cleanup:
     return ret;
@@ -2032,12 +2033,51 @@ cleanup:
 static int
 testDomainGetVcpusFlags(virDomainPtr domain, unsigned int flags)
 {
-    if (flags != (VIR_DOMAIN_VCPU_LIVE | VIR_DOMAIN_VCPU_MAXIMUM)) {
-        testError(VIR_ERR_INVALID_ARG, _("unsupported flags: (0x%x)"), flags);
+    testConnPtr privconn = domain->conn->privateData;
+    virDomainObjPtr vm;
+    virDomainDefPtr def;
+    int ret = -1;
+
+    virCheckFlags(VIR_DOMAIN_VCPU_LIVE |
+                  VIR_DOMAIN_VCPU_CONFIG |
+                  VIR_DOMAIN_VCPU_MAXIMUM, -1);
+
+    /* Exactly one of LIVE or CONFIG must be set.  */
+    if (!(flags & VIR_DOMAIN_VCPU_LIVE) == !(flags & VIR_DOMAIN_VCPU_CONFIG)) {
+        testError(VIR_ERR_INVALID_ARG,
+                  _("invalid flag combination: (0x%x)"), flags);
         return -1;
     }

-    return testGetMaxVCPUs(domain->conn, "test");
+    testDriverLock(privconn);
+    vm = virDomainFindByUUID(&privconn->domains, domain->uuid);
+    testDriverUnlock(privconn);
+
+    if (!vm) {
+        char uuidstr[VIR_UUID_STRING_BUFLEN];
+        virUUIDFormat(domain->uuid, uuidstr);
+        testError(VIR_ERR_NO_DOMAIN,
+                  _("no domain with matching uuid '%s'"), uuidstr);
+        goto cleanup;
+    }
+
+    if (flags & VIR_DOMAIN_VCPU_LIVE) {
+        if (!virDomainObjIsActive(vm)) {
+            testError(VIR_ERR_OPERATION_INVALID, "%s",
+                      _("domain not active"));
+            goto cleanup;
+        }
+        def = vm->def;
+    } else {
+        def = vm->newDef ? vm->newDef : vm->def;
+    }
+
+    ret = (flags & VIR_DOMAIN_VCPU_MAXIMUM) ? def->maxvcpus : def->vcpus;
+
+cleanup:
+    if (vm)
+        virDomainObjUnlock(vm);
+    return ret;
 }

 static int
@@ -2053,21 +2093,30 @@ testDomainSetVcpusFlags(virDomainPtr domain, unsigned int nrCpus,
 {
     testConnPtr privconn = domain->conn->privateData;
     virDomainObjPtr privdom = NULL;
+    virDomainDefPtr def;
     int ret = -1, maxvcpus;

-    if (flags != VIR_DOMAIN_VCPU_LIVE) {
-        testError(VIR_ERR_INVALID_ARG, _("unsupported flags: (0x%x)"), flags);
+    virCheckFlags(VIR_DOMAIN_VCPU_LIVE |
+                  VIR_DOMAIN_VCPU_CONFIG |
+                  VIR_DOMAIN_VCPU_MAXIMUM, -1);
+
+    /* At least one of LIVE or CONFIG must be set.  MAXIMUM cannot be
+     * mixed with LIVE.  */
+    if ((flags & (VIR_DOMAIN_VCPU_LIVE | VIR_DOMAIN_VCPU_CONFIG)) == 0 ||
+        (flags & (VIR_DOMAIN_VCPU_MAXIMUM | VIR_DOMAIN_VCPU_LIVE)) ==
+         (VIR_DOMAIN_VCPU_MAXIMUM | VIR_DOMAIN_VCPU_LIVE)) {
+        testError(VIR_ERR_INVALID_ARG,
+                  _("invalid flag combination: (0x%x)"), flags);
+        return -1;
+    }
+    if (!nrCpus || (maxvcpus = testGetMaxVCPUs(domain->conn, NULL)) < nrCpus) {
+        testError(VIR_ERR_INVALID_ARG,
+                  _("argument out of range: %d"), nrCpus);
         return -1;
     }
-
-    /* Do this first before locking */
-    maxvcpus = testDomainGetMaxVcpus(domain);
-    if (maxvcpus < 0)
-        goto cleanup;

     testDriverLock(privconn);
-    privdom = virDomainFindByName(&privconn->domains,
-                                  domain->name);
+    privdom = virDomainFindByUUID(&privconn->domains, domain->uuid);
     testDriverUnlock(privconn);

     if (privdom == NULL) {
@@ -2075,13 +2124,17 @@ testDomainSetVcpusFlags(virDomainPtr domain, unsigned int nrCpus,
         goto cleanup;
     }

-    if (!virDomainObjIsActive(privdom)) {
+    if (!virDomainObjIsActive(privdom) && (flags & VIR_DOMAIN_VCPU_LIVE)) {
         testError(VIR_ERR_OPERATION_INVALID,
                   "%s", _("cannot hotplug vcpus for an inactive domain"));
         goto cleanup;
     }

-    /* We allow more cpus in guest than host */
+    /* We allow more cpus in guest than host, but not more than the
+     * domain's starting limit.  */
+    if ((flags & (VIR_DOMAIN_VCPU_MAXIMUM | VIR_DOMAIN_VCPU_LIVE)) ==
+        VIR_DOMAIN_VCPU_LIVE && privdom->def->maxvcpus < maxvcpus)
+        maxvcpus = privdom->def->maxvcpus;
     if (nrCpus > maxvcpus) {
         testError(VIR_ERR_INVALID_ARG,
                   "requested cpu amount exceeds maximum (%d > %d)",
@@ -2089,12 +2142,49 @@ testDomainSetVcpusFlags(virDomainPtr domain, unsigned int nrCpus,
         goto cleanup;
     }

-    /* Update VCPU state for the running domain */
-    if (testDomainUpdateVCPUs(domain->conn, privdom, nrCpus, 0) < 0)
-        goto cleanup;
+    switch (flags) {
+    case VIR_DOMAIN_VCPU_MAXIMUM | VIR_DOMAIN_VCPU_CONFIG:
+        def = privdom->def;
+        if (virDomainObjIsActive(privdom)) {
+            if (privdom->newDef)
+                def = privdom->newDef;
+            else {
+                testError(VIR_ERR_OPERATION_INVALID, "%s",
+                          _("no persistent state"));
+                goto cleanup;
+            }
+        }
+        def->maxvcpus = nrCpus;
+        if (nrCpus < def->vcpus)
+            def->vcpus = nrCpus;
+        ret = 0;
+        break;

-    privdom->def->vcpus = nrCpus;
-    ret = 0;
+    case VIR_DOMAIN_VCPU_CONFIG:
+        def = privdom->def;
+        if (virDomainObjIsActive(privdom)) {
+            if (privdom->newDef)
+                def = privdom->newDef;
+            else {
+                testError(VIR_ERR_OPERATION_INVALID, "%s",
+                          _("no persistent state"));
+                goto cleanup;
+            }
+        }
+        def->vcpus = nrCpus;
+        ret = 0;
+        break;
+
+    case VIR_DOMAIN_VCPU_LIVE:
+        ret = testDomainUpdateVCPUs(domain->conn, privdom, nrCpus, 0);
+        break;
+
+    case VIR_DOMAIN_VCPU_LIVE | VIR_DOMAIN_VCPU_CONFIG:
+        ret = testDomainUpdateVCPUs(domain->conn, privdom, nrCpus, 0);
+        if (ret == 0 && privdom->newDef)
+            privdom->newDef->vcpus = nrCpus;
+        break;
+    }

 cleanup:
     if (privdom)
-- 
1.7.2.3