test_driver: implement virDomainFSFreeze

On success update the domain-private data. Consider / and /boot to be
the only mountpoints avaiable in order to be consistent with the other
FS-related calls.

Signed-off-by: Ilias Stamatis <stamatis.iliass@gmail.com>
Reviewed-by: Erik Skultety <eskultet@redhat.com>

src/test/test_driver.c

@@ -390,6 +390,8 @@ typedef struct _testDomainObjPrivate testDomainObjPrivate;
 typedef testDomainObjPrivate *testDomainObjPrivatePtr;
 struct _testDomainObjPrivate {
     testDriverPtr driver;
+
+    bool frozen[2]; /* used by file system related calls */
 };
 
 
@@ -402,6 +404,7 @@ testDomainObjPrivateAlloc(void *opaque)
         return NULL;
 
     priv->driver = opaque;
+    priv->frozen[0] = priv->frozen[1] = false;
 
     return priv;
 }
@@ -4070,6 +4073,67 @@ static int testDomainUndefine(virDomainPtr domain)
     return testDomainUndefineFlags(domain, 0);
 }
 
+
+static int
+testDomainFSFreeze(virDomainPtr dom,
+                   const char **mountpoints,
+                   unsigned int nmountpoints,
+                   unsigned int flags)
+{
+    virDomainObjPtr vm;
+    testDomainObjPrivatePtr priv;
+    size_t i;
+    int ret = -1;
+
+    virCheckFlags(0, -1);
+
+    if (!(vm = testDomObjFromDomain(dom)))
+        goto cleanup;
+
+    if (virDomainObjCheckActive(vm) < 0)
+        goto cleanup;
+
+    priv = vm->privateData;
+
+    if (nmountpoints == 0) {
+        ret = 2 - (priv->frozen[0] + priv->frozen[1]);
+        priv->frozen[0] = priv->frozen[1] = true;
+    } else {
+        int nfreeze = 0;
+        bool freeze[2];
+
+        memcpy(&freeze, priv->frozen, 2);
+
+        for (i = 0; i < nmountpoints; i++) {
+            if (STREQ(mountpoints[i], "/")) {
+                if (!freeze[0]) {
+                    freeze[0] = true;
+                    nfreeze++;
+                }
+            } else if (STREQ(mountpoints[i], "/boot")) {
+                if (!freeze[1]) {
+                    freeze[1] = true;
+                    nfreeze++;
+                }
+            } else {
+                virReportError(VIR_ERR_OPERATION_INVALID,
+                               _("mount point not found: %s"),
+                               mountpoints[i]);
+                goto cleanup;
+            }
+        }
+
+        /* steal the helper copy */
+        memcpy(priv->frozen, &freeze, 2);
+        ret = nfreeze;
+    }
+
+ cleanup:
+    virDomainObjEndAPI(&vm);
+    return ret;
+}
+
+
 static int testDomainGetAutostart(virDomainPtr domain,
                                   int *autostart)
 {
@@ -8771,6 +8835,7 @@ static virHypervisorDriver testHypervisorDriver = {
     .domainDefineXMLFlags = testDomainDefineXMLFlags, /* 1.2.12 */
     .domainUndefine = testDomainUndefine, /* 0.1.11 */
     .domainUndefineFlags = testDomainUndefineFlags, /* 0.9.4 */
+    .domainFSFreeze = testDomainFSFreeze, /* 5.7.0 */
     .domainGetAutostart = testDomainGetAutostart, /* 0.3.2 */
     .domainSetAutostart = testDomainSetAutostart, /* 0.3.2 */
     .domainGetDiskErrors = testDomainGetDiskErrors, /* 5.4.0 */