[libvirt] [PATCH v2 2/3] tests: Add test for new virkmod functions
John Ferlan
jferlan at redhat.com
Thu Jan 30 00:52:44 UTC 2014
Adding tests for new virModprobe{Config|Load|Unload|UseBlacklist} API's.
Other than the virModprobeConfig() calls, the tests require some special
set up and to be run from root.
Signed-off-by: John Ferlan <jferlan at redhat.com>
---
.gitignore | 2 +
tests/Makefile.am | 5 ++
tests/virkmodtest.c | 201 ++++++++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 208 insertions(+)
create mode 100644 tests/virkmodtest.c
diff --git a/.gitignore b/.gitignore
index 96b7211..79437e9 100644
--- a/.gitignore
+++ b/.gitignore
@@ -70,6 +70,7 @@
/docs/libvirt-refs.xml
/docs/search.php
/docs/todo.html.in
+/examples/domain-events/
/examples/object-events/event-test
/examples/dominfo/info1
/examples/domsuspend/suspend
@@ -202,6 +203,7 @@
/tests/viridentitytest
/tests/virkeycodetest
/tests/virkeyfiletest
+/tests/virkmodtest
/tests/virlockspacetest
/tests/virlogtest
/tests/virnet*test
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 0930073..632c953 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -142,6 +142,7 @@ test_programs = virshtest sockettest \
sysinfotest \
virstoragetest \
virnetdevbandwidthtest \
+ virkmodtest \
$(NULL)
if WITH_REMOTE
@@ -655,6 +656,10 @@ virnetdevbandwidthtest_SOURCES = \
virnetdevbandwidthtest.c testutils.h testutils.c
virnetdevbandwidthtest_LDADD = $(LDADDS)
+virkmodtest_SOURCES = \
+ virkmodtest.c testutils.h testutils.c
+virkmodtest_LDADD = $(LDADDS)
+
if WITH_LIBVIRTD
libvirtdconftest_SOURCES = \
libvirtdconftest.c testutils.h testutils.c \
diff --git a/tests/virkmodtest.c b/tests/virkmodtest.c
new file mode 100644
index 0000000..8957e2c
--- /dev/null
+++ b/tests/virkmodtest.c
@@ -0,0 +1,201 @@
+/*
+ * 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 <stdio.h>
+# include <virkmod.h>
+# include <virstring.h>
+
+# define VIR_FROM_THIS VIR_FROM_NONE
+
+/* Defining MODPROBE_CONFIG_VFIO_PCI to 1 will allow this test to run
+ * through the module load, unload, and blacklist check API's. Doing
+ * so assumes that vfio-pci is present and available on your system
+ * and it's been placed on the blacklist. You must also run as root
+ * since the calls use /sbin/modprobe to load/unload a module.
+ *
+ * The load/unload tests should succeed and prove that libvirt wasn't
+ * checking for the blacklist.
+ *
+ * The use blacklist test follows the logic in virPCIProbeStubDriver()
+ * where an attempt to load a blacklist driver will result in the load
+ * appearing to succeed, but then finding the driver on the blacklist.
+ *
+ * To place 'vfio-pci' on the blacklist for a Fedora system create
+ * "/etc/modparams.d/blacklist-vfio-pci.conf" and within the file
+ * add the line "blacklist vfio-pci".
+ */
+# define MODPROBE_CONFIG_VFIO_PCI 0
+
+static int
+testModprobeConfig(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 = virModprobeConfig();
+ if (!outbuf) {
+ fprintf(stderr, "Failed to get config\n");
+ goto cleanup;
+ }
+ ret = 0;
+
+cleanup:
+ VIR_FREE(outbuf);
+ return ret;
+}
+
+
+# if MODPROBE_CONFIG_VFIO_PCI
+static int
+testModprobeLoad(const void *args)
+{
+ int ret = -1;
+ char *errbuf = NULL;
+ const char *module = args;
+
+ errbuf = virModprobeLoad(module);
+ if (errbuf) {
+ fprintf(stderr, "Failed to load, error: %s\n", errbuf);
+ goto cleanup;
+ }
+
+ ret = 0;
+
+cleanup:
+ VIR_FREE(errbuf);
+ return ret;
+}
+
+
+static int
+testModprobeUnload(const void *args)
+{
+ int ret = -1;
+ char *errbuf = NULL;
+ const char *module = args;
+
+ errbuf = virModprobeUnload(module);
+ if (errbuf) {
+ fprintf(stderr, "Failed to unload, error: %s\n", errbuf);
+ goto cleanup;
+ }
+
+ ret = 0;
+
+cleanup:
+ VIR_FREE(errbuf);
+ return ret;
+}
+
+
+static int
+testModprobeUseBlacklist(const void *args)
+{
+ int ret = -1;
+ size_t i;
+ char *outbuf = NULL;
+ char *errbuf = NULL;
+ char *drvblklst = NULL;
+ const char *module = args;
+
+ errbuf = virModprobeUseBlacklist(module);
+ if (errbuf) {
+ fprintf(stderr, "Failed to load, error: %s\n", errbuf);
+ goto cleanup;
+ }
+
+ /* All error path code - purpose is to determine whether the failure
+ * occurs because device is on blacklist in order to add an error
+ * message to help detect why load failed
+ */
+ if (virAsprintf(&drvblklst, "blacklist %s", module) < 0)
+ goto cleanup;
+
+ /* modprobe will convert all '-' into '_', so we need to as well */
+ for (i = 0; i < drvblklst[i]; i++)
+ if (drvblklst[i] == '-')
+ drvblklst[i] = '_';
+
+ outbuf = virModprobeConfig();
+ if (!outbuf)
+ goto cleanup;
+
+ /* Find module on blacklist? */
+ if (!strstr(outbuf, drvblklst)) {
+ fprintf(stderr, "Failed to find %s on blacklist\n", module);
+ goto cleanup;
+ }
+
+ ret = 0;
+
+cleanup:
+ VIR_FREE(drvblklst);
+ VIR_FREE(outbuf);
+ VIR_FREE(errbuf);
+ if (ret == -1) {
+ errbuf = virModprobeUnload(module);
+ if (errbuf)
+ fprintf(stderr, "Failed to unload, error: %s\n", errbuf);
+ VIR_FREE(errbuf);
+ }
+ return ret;
+}
+# endif /* MODPROBE_CONFIG_VFIO_PCI*/
+
+
+static int
+mymain(void)
+{
+ int ret = 0;
+# if MODPROBE_CONFIG_VFIO_PCI
+ const char *module = "vfio-pci";
+# endif
+
+ if (virtTestRun("modprobe config", testModprobeConfig, NULL) < 0)
+ ret = -1;
+# if MODPROBE_CONFIG_VFIO_PCI
+ if (virtTestRun("modprobe load", testModprobeLoad, module) < 0)
+ ret = -1;
+ if (virtTestRun("modprobe unload", testModprobeUnload, module) < 0)
+ ret = -1;
+ if (virtTestRun("modprobe blacklist", testModprobeUseBlacklist, module) < 0)
+ ret = -1;
+# endif /* MODPROBE_CONFIG_VFIO_PCI */
+
+ return ret==0 ? EXIT_SUCCESS : EXIT_FAILURE;
+
+}
+
+VIRT_TEST_MAIN(mymain);
+#else
+int
+main(void)
+{
+ return EXIT_AM_SKIP;
+}
+#endif
--
1.8.4.2
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