tests: Add test for new virkmod functions

Adding tests for new virKMod{Config|Load|Unload}() API's.

A test for virKModIsBlacklisted() would require some setup which cannot
be assumed.

.gitignore

@@ -202,6 +202,7 @@
 /tests/viridentitytest
 /tests/virkeycodetest
 /tests/virkeyfiletest
+/tests/virkmodtest
 /tests/virlockspacetest
 /tests/virlogtest
 /tests/virnet*test

tests/Makefile.am

@@ -143,6 +143,7 @@ test_programs = virshtest sockettest \
 	sysinfotest \
 	virstoragetest \
 	virnetdevbandwidthtest \
+	virkmodtest \
 	$(NULL)
 
 if WITH_REMOTE
@@ -660,6 +661,10 @@ virnetdevbandwidthtest_SOURCES = \
 	virnetdevbandwidthtest.c testutils.h testutils.c
 virnetdevbandwidthtest_LDADD = $(LDADDS) $(LIBXML_LIBS)
 
+virkmodtest_SOURCES = \
+	virkmodtest.c testutils.h testutils.c
+virkmodtest_LDADD = $(LDADDS)
+
 if WITH_LIBVIRTD
 libvirtdconftest_SOURCES = \
 	libvirtdconftest.c testutils.h testutils.c \

tests/virkmodtest.c

@@ -0,0 +1,183 @@
+/*
+ * Copyright (C) 2014 Red Hat, Inc.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library.  If not, see
+ * <http://www.gnu.org/licenses/>.
+ */
+
+#include <config.h>
+
+#include "testutils.h"
+
+#ifdef __linux__
+
+# include <stdlib.h>
+# include "vircommand.h"
+# include "virkmod.h"
+# include "virstring.h"
+
+struct testInfo {
+    const char *module;
+    const char *exp_cmd;
+    bool useBlacklist;
+};
+
+# define VIR_FROM_THIS VIR_FROM_NONE
+
+static int
+testKModConfig(const void *args ATTRIBUTE_UNUSED)
+{
+    int ret = -1;
+    char *outbuf = NULL;
+
+    /* This will return the contents of a 'modprobe -c' which can differ
+     * from machine to machine - be happy that we get something.
+     */
+    outbuf = virKModConfig();
+    if (!outbuf) {
+        fprintf(stderr, "Failed to get config\n");
+        goto cleanup;
+    }
+    ret = 0;
+
+cleanup:
+    VIR_FREE(outbuf);
+    return ret;
+}
+
+
+static int
+checkOutput(virBufferPtr buf, const char *exp_cmd)
+{
+    int ret = -1;
+    char *actual_cmd = NULL;
+
+    if (!(actual_cmd = virBufferContentAndReset(buf))) {
+        int err = virBufferError(buf);
+        if (err)
+            fprintf(stderr, "buffer's in error state: %d", err);
+        else
+            fprintf(stderr, "cannot compare buffer to exp: %s", exp_cmd);
+        goto cleanup;
+    }
+
+    if (STRNEQ(exp_cmd, actual_cmd)) {
+        virtTestDifference(stderr, exp_cmd, actual_cmd);
+        goto cleanup;
+    }
+
+    ret = 0;
+
+cleanup:
+    VIR_FREE(actual_cmd);
+    return ret;
+}
+
+
+static int
+testKModLoad(const void *args)
+{
+    int ret = -1;
+    char *errbuf = NULL;
+    const struct testInfo *info = args;
+    const char *module = info->module;
+    bool useBlacklist = info->useBlacklist;
+    virBuffer buf = VIR_BUFFER_INITIALIZER;
+
+    virCommandSetDryRun(&buf);
+
+    errbuf = virKModLoad(module, useBlacklist);
+    if (errbuf) {
+        fprintf(stderr, "Failed to load, error: %s\n", errbuf);
+        goto cleanup;
+    }
+
+    if (checkOutput(&buf, info->exp_cmd) < 0)
+        goto cleanup;
+
+    ret = 0;
+
+cleanup:
+    virCommandSetDryRun(NULL);
+    VIR_FREE(errbuf);
+    return ret;
+}
+
+
+static int
+testKModUnload(const void *args)
+{
+    int ret = -1;
+    char *errbuf = NULL;
+    const struct testInfo *info = args;
+    const char *module = info->module;
+    virBuffer buf = VIR_BUFFER_INITIALIZER;
+
+    virCommandSetDryRun(&buf);
+
+    errbuf = virKModUnload(module);
+    if (errbuf) {
+        fprintf(stderr, "Failed to unload, error: %s\n", errbuf);
+        goto cleanup;
+    }
+
+    if (checkOutput(&buf, info->exp_cmd) < 0)
+        goto cleanup;
+
+    ret = 0;
+
+cleanup:
+    virCommandSetDryRun(NULL);
+    VIR_FREE(errbuf);
+    return ret;
+}
+
+
+static int
+mymain(void)
+{
+    int ret = 0;
+
+    if (virtTestRun("config", testKModConfig, NULL) < 0)
+        ret = -1;
+
+    /* Although we cannot run the command on the host, we can compare
+     * the output of the created command against what we'd expect to be
+     * created. So let's at least do that.
+     */
+# define DO_TEST(_name, _cb, _blkflag, _exp_cmd)              \
+    do {                                                      \
+        struct testInfo data = {.module = "vfio-pci",         \
+                                .exp_cmd = _exp_cmd,          \
+                                .useBlacklist = _blkflag};    \
+        if (virtTestRun(_name, _cb,  &data) < 0)              \
+            ret = -1;                                         \
+    } while (0)
+
+    DO_TEST("load", testKModLoad, false, MODPROBE " vfio-pci\n");
+    DO_TEST("unload", testKModUnload, false, RMMOD " vfio-pci\n");
+    DO_TEST("blklist", testKModLoad, true, MODPROBE " -b vfio-pci\n");
+
+    return ret==0 ? EXIT_SUCCESS : EXIT_FAILURE;
+
+}
+
+VIRT_TEST_MAIN(mymain);
+#else
+int
+main(void)
+{
+    return EXIT_AM_SKIP;
+}
+#endif