Re: [libvirt PATCH v2 1/1] tests: Introduce virhostdevmock

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On 5/6/20 2:54 PM, Andrea Bolognani wrote:
We need this for all tests that use virHostdevManager, because
during creation of this object for unprivileged connections
like those used in the test suite we would end up writing inside
the user's home directory.

That's bad manners in general, but when running the test suite
inside a purposefully constrained environment such as the one
exposed by pbuilder, it turns into an outright test failure:

   Could not initialize HostdevManager - operation failed: Failed
   to create state dir '/nonexistent/.cache/libvirt/hostdevmgr'

Signed-off-by: Andrea Bolognani <abologna@xxxxxxxxxx>
---
  tests/Makefile.am       |  7 +++++++
  tests/qemuhotplugtest.c |  1 +
  tests/virhostdevmock.c  | 29 +++++++++++++++++++++++++++++
  tests/virhostdevtest.c  |  4 +++-
  4 files changed, 40 insertions(+), 1 deletion(-)
  create mode 100644 tests/virhostdevmock.c

diff --git a/tests/Makefile.am b/tests/Makefile.am
index ada5b8fc57..fc516376b4 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -212,6 +212,7 @@ test_libraries = libshunload.la \
  	libvirnetdaemonmock.la \
  	libvirnetserverclientmock.la \
  	libvircgroupmock.la \
+	libvirhostdevmock.la \
  	libvirpcimock.la \
  	libvirnetdevmock.la \
  	libvirrandommock.la \
@@ -1226,6 +1227,12 @@ libvirfilecachemock_la_SOURCES = \
  libvirfilecachemock_la_LDFLAGS = $(MOCKLIBS_LDFLAGS)
  libvirfilecachemock_la_LIBADD = $(MOCKLIBS_LIBS)
+libvirhostdevmock_la_SOURCES = \
+	virhostdevmock.c \
+	$(NULL)
+libvirhostdevmock_la_LDFLAGS = $(MOCKLIBS_LDFLAGS)
+libvirhostdevmock_la_LIBADD = $(MOCKLIBS_LIBS)
+
  if WITH_LINUX
  vircaps2xmltest_SOURCES = \
  	vircaps2xmltest.c testutils.h testutils.c virfilewrapper.h virfilewrapper.c
diff --git a/tests/qemuhotplugtest.c b/tests/qemuhotplugtest.c
index 9a215ab303..cf87de187f 100644
--- a/tests/qemuhotplugtest.c
+++ b/tests/qemuhotplugtest.c
@@ -900,6 +900,7 @@ mymain(void)
  }
VIR_TEST_MAIN_PRELOAD(mymain,
+                      VIR_TEST_MOCK("virhostdev"),
                        VIR_TEST_MOCK("virpci"),
                        VIR_TEST_MOCK("domaincaps"),
                        VIR_TEST_MOCK("virprocess"),
diff --git a/tests/virhostdevmock.c b/tests/virhostdevmock.c
new file mode 100644
index 0000000000..8658d9affd
--- /dev/null
+++ b/tests/virhostdevmock.c
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2020 Red Hat, Inc.
+ * SPDX-License-Identifier: LGPL-2.1-or-later
+ */
+
+#include <config.h>
+
+#include "virutil.h"
+#include "virmock.h"
+
+static char *(*real_virGetUserRuntimeDirectory)(void);

This is not needed, you are not calling the original function anywhere. Moreover, the original function must be marked as attribute no-inline.

Squash this in:

diff --git i/src/util/virutil.h w/src/util/virutil.h
index ee23f0c1f4..49b4bf440f 100644
--- i/src/util/virutil.h
+++ w/src/util/virutil.h
@@ -99,7 +99,7 @@ char *virGetUserDirectory(void);
 char *virGetUserDirectoryByUID(uid_t uid);
 char *virGetUserConfigDirectory(void);
 char *virGetUserCacheDirectory(void);
-char *virGetUserRuntimeDirectory(void);
+char *virGetUserRuntimeDirectory(void) G_GNUC_NO_INLINE;
 char *virGetUserShell(uid_t uid);
 char *virGetUserName(uid_t uid) G_GNUC_NO_INLINE;
 char *virGetGroupName(gid_t gid) G_GNUC_NO_INLINE;
diff --git i/tests/virhostdevmock.c w/tests/virhostdevmock.c
index 8658d9affd..9b0e4dc2b0 100644
--- i/tests/virhostdevmock.c
+++ w/tests/virhostdevmock.c
@@ -6,24 +6,10 @@
 #include <config.h>

 #include "virutil.h"
-#include "virmock.h"
-
-static char *(*real_virGetUserRuntimeDirectory)(void);
-
-static void
-init_syms(void)
-{
-    if (real_virGetUserRuntimeDirectory)
-        return;
-
-    VIR_MOCK_REAL_INIT(virGetUserRuntimeDirectory);
-}

 char *
 virGetUserRuntimeDirectory(void)
 {
-    init_syms();
-
     return g_build_filename(g_getenv("LIBVIRT_FAKE_ROOT_DIR"),
                             "user-runtime-directory", NULL);
 }



Reviewed-by: Michal Privoznik <mprivozn@xxxxxxxxxx>

Michal




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