mirror of
https://gitlab.com/libvirt/libvirt.git
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tests: Introduce virpcitest
Among with this test introduce virpcimock as we need to mock some syscalls, e.g. redirect open() of a file under /sys/bus/pci to a stub sysfs tree. Signed-off-by: Michal Privoznik <mprivozn@redhat.com>
This commit is contained in:
Michal Privoznik
parent
629aff378f
commit
d770618842
1
.gitignore
vendored
1
.gitignore
vendored
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@ -212,6 +212,7 @@
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/tests/virlockspacetest
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/tests/virlogtest
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/tests/virnet*test
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/tests/virpcitest
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/tests/virportallocatortest
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/tests/virshtest
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/tests/virstoragetest
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2
cfg.mk
2
cfg.mk
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@ -946,7 +946,7 @@ exclude_file_name_regexp--sc_bindtextdomain = ^(tests|examples)/
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exclude_file_name_regexp--sc_copyright_usage = \
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^COPYING(|\.LESSER)$$
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exclude_file_name_regexp--sc_flags_usage = ^(docs/|src/util/virnetdevtap\.c$$|tests/vircgroupmock\.c$$)
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exclude_file_name_regexp--sc_flags_usage = ^(docs/|src/util/virnetdevtap\.c$$|tests/vir(cgroup|pci)mock\.c$$)
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exclude_file_name_regexp--sc_libvirt_unmarked_diagnostics = \
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^(src/rpc/gendispatch\.pl$$|tests/)
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@ -123,6 +123,7 @@ test_programs = virshtest sockettest \
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virauthconfigtest \
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virbitmaptest \
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vircgrouptest \
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virpcitest \
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virendiantest \
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viridentitytest \
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virkeycodetest \
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@ -306,6 +307,7 @@ test_libraries = libshunload.la \
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libvirportallocatormock.la \
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virnetserverclientmock.la \
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vircgroupmock.la \
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virpcimock.la \
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$(NULL)
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if WITH_QEMU
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test_libraries += libqemumonitortestutils.la
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@ -742,6 +744,17 @@ vircgroupmock_la_CFLAGS = $(AM_CFLAGS)
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vircgroupmock_la_LDFLAGS = -module -avoid-version \
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-rpath /evil/libtool/hack/to/force/shared/lib/creation
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virpcitest_SOURCES = \
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virpcitest.c testutils.h testutils.c
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virpcitest_LDADD = $(LDADDS)
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virpcimock_la_SOURCES = \
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virpcimock.c
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virpcimock_la_CFLAGS = $(AM_CFLAGS)
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virpcimock_la_LIBADD = ../src/libvirt.la
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virpcimock_la_LDFLAGS = -module -avoid-version \
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-rpath /evil/libtool/hack/to/force/shared/lib/creation
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if WITH_DBUS
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virdbustest_SOURCES = \
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virdbustest.c testutils.h testutils.c
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312
tests/virpcimock.c
Normal file
312
tests/virpcimock.c
Normal file
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@ -0,0 +1,312 @@
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/*
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* Copyright (C) 2013 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Author: Michal Privoznik <mprivozn@redhat.com>
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*/
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#include <config.h>
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#ifdef __linux__
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# include "internal.h"
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# include <stdio.h>
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# include <dlfcn.h>
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# include <stdlib.h>
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# include <unistd.h>
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# include <fcntl.h>
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# include <sys/stat.h>
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# include <stdarg.h>
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# include "viralloc.h"
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# include "virstring.h"
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# include "virfile.h"
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static int (*realaccess)(const char *path, int mode);
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static int (*reallstat)(const char *path, struct stat *sb);
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static int (*real__lxstat)(int ver, const char *path, struct stat *sb);
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static int (*realopen)(const char *path, int flags, ...);
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/* Don't make static, since it causes problems with clang
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* when passed as an arg to virAsprintf()
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* vircgroupmock.c:462:22: error: static variable 'fakesysfsdir' is used in an inline function with external linkage [-Werror,-Wstatic-in-inline]
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*/
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char *fakesysfsdir;
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# define PCI_SYSFS_PREFIX "/sys/bus/pci/"
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# define STDERR(...) \
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fprintf(stderr, "%s %zu: ", __FUNCTION__, (size_t) __LINE__); \
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fprintf(stderr, __VA_ARGS__); \
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fprintf(stderr, "\n"); \
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# define ABORT(...) \
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do { \
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STDERR(__VA_ARGS__); \
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abort(); \
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} while (0)
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# define ABORT_OOM() \
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ABORT("Out of memory")
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/*
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* The plan:
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*
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* Mock some file handling functions. Redirect them into a stub tree passed via
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* LIBVIRT_FAKE_SYSFS_DIR env variable. All files and links within stub tree is
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* created by us.
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*/
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/*
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*
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* Functions to model kernel behavior
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*
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*/
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struct pciDevice {
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char *id;
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int vendor;
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int device;
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};
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struct pciDevice **pciDevices = NULL;
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size_t nPciDevices = 0;
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static void init_env(void);
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static void pci_device_new_from_stub(const struct pciDevice *data);
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/*
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* Helper functions
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*/
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static void
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make_file(const char *path,
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const char *name,
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const char *value)
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{
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int fd = -1;
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char *filepath = NULL;
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if (virAsprintfQuiet(&filepath, "%s/%s", path, name) < 0)
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ABORT_OOM();
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if ((fd = realopen(filepath, O_CREAT|O_WRONLY, 0666)) < 0)
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ABORT("Unable to open: %s", filepath);
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if (value && safewrite(fd, value, strlen(value)) != strlen(value))
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ABORT("Unable to write: %s", filepath);
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VIR_FORCE_CLOSE(fd);
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VIR_FREE(filepath);
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}
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static int
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getrealpath(char **newpath,
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const char *path)
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{
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if (!fakesysfsdir)
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init_env();
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if (STRPREFIX(path, PCI_SYSFS_PREFIX)) {
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if (virAsprintfQuiet(newpath, "%s/%s",
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fakesysfsdir,
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path + strlen(PCI_SYSFS_PREFIX)) < 0) {
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errno = ENOMEM;
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return -1;
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}
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} else {
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if (VIR_STRDUP_QUIET(*newpath, path) < 0)
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return -1;
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}
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return 0;
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}
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/*
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* PCI Device functions
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*/
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static void
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pci_device_new_from_stub(const struct pciDevice *data)
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{
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struct pciDevice *dev;
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char *devpath;
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char tmp[32];
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if (VIR_ALLOC_QUIET(dev) < 0 ||
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virAsprintfQuiet(&devpath, "%s/devices/%s", fakesysfsdir, data->id) < 0)
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ABORT_OOM();
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memcpy(dev, data, sizeof(*dev));
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if (virFileMakePath(devpath) < 0)
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ABORT("Unable to create: %s", devpath);
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make_file(devpath, "config", "some dummy config");
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if (snprintf(tmp, sizeof(tmp), "0x%.4x", dev->vendor) < 0)
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ABORT("@tmp overflow");
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make_file(devpath, "vendor", tmp);
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if (snprintf(tmp, sizeof(tmp), "0x%.4x", dev->device) < 0)
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ABORT("@tmp overflow");
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make_file(devpath, "device", tmp);
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if (VIR_APPEND_ELEMENT_QUIET(pciDevices, nPciDevices, dev) < 0)
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ABORT_OOM();
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VIR_FREE(devpath);
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}
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/*
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* Functions to load the symbols and init the environment
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*/
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static void
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init_syms(void)
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{
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if (realaccess)
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return;
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# define LOAD_SYM(name) \
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do { \
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if (!(real ## name = dlsym(RTLD_NEXT, #name))) \
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ABORT("Cannot find real '%s' symbol\n", #name); \
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} while (0)
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# define LOAD_SYM_ALT(name1, name2) \
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do { \
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if (!(real ## name1 = dlsym(RTLD_NEXT, #name1)) && \
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!(real ## name2 = dlsym(RTLD_NEXT, #name2))) \
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ABORT("Cannot find real '%s' or '%s' symbol\n", \
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#name1, #name2); \
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} while (0)
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LOAD_SYM(access);
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LOAD_SYM_ALT(lstat, __lxstat);
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LOAD_SYM(open);
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}
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static void
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init_env(void)
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{
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if (fakesysfsdir)
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return;
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if (!(fakesysfsdir = getenv("LIBVIRT_FAKE_SYSFS_DIR")))
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ABORT("Missing LIBVIRT_FAKE_SYSFS_DIR env variable\n");
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# define MAKE_PCI_DEVICE(Id, Vendor, Device, ...) \
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do { \
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struct pciDevice dev = {.id = (char *)Id, .vendor = Vendor, \
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.device = Device, __VA_ARGS__}; \
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pci_device_new_from_stub(&dev); \
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} while (0)
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MAKE_PCI_DEVICE("0000:00:00.0", 0x8086, 0x0044);
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}
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/*
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*
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* Mocked functions
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*
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*/
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int
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access(const char *path, int mode)
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{
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int ret;
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init_syms();
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if (STRPREFIX(path, PCI_SYSFS_PREFIX)) {
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char *newpath;
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if (getrealpath(&newpath, path) < 0)
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return -1;
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ret = realaccess(newpath, mode);
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VIR_FREE(newpath);
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} else {
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ret = realaccess(path, mode);
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}
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return ret;
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}
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int
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__lxstat(int ver, const char *path, struct stat *sb)
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{
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int ret;
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init_syms();
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if (STRPREFIX(path, PCI_SYSFS_PREFIX)) {
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char *newpath;
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if (getrealpath(&newpath, path) < 0)
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return -1;
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ret = real__lxstat(ver, newpath, sb);
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VIR_FREE(newpath);
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} else {
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ret = real__lxstat(ver, path, sb);
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}
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return ret;
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}
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int
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lstat(const char *path, struct stat *sb)
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{
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int ret;
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init_syms();
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if (STRPREFIX(path, PCI_SYSFS_PREFIX)) {
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char *newpath;
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if (getrealpath(&newpath, path) < 0)
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return -1;
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ret = reallstat(newpath, sb);
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VIR_FREE(newpath);
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} else {
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ret = reallstat(path, sb);
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}
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return ret;
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}
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int
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open(const char *path, int flags, ...)
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{
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int ret;
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char *newpath = NULL;
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init_syms();
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if (STRPREFIX(path, PCI_SYSFS_PREFIX) &&
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getrealpath(&newpath, path) < 0)
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return -1;
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if (flags & O_CREAT) {
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va_list ap;
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mode_t mode;
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va_start(ap, flags);
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mode = va_arg(ap, mode_t);
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va_end(ap);
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ret = realopen(newpath ? newpath : path, flags, mode);
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} else {
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ret = realopen(newpath ? newpath : path, flags);
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}
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VIR_FREE(newpath);
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return ret;
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}
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#else
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/* Nothing to override on non-__linux__ platforms */
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#endif
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103
tests/virpcitest.c
Normal file
103
tests/virpcitest.c
Normal file
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@ -0,0 +1,103 @@
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/*
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* Copyright (C) 2013 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
|
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* License as published by the Free Software Foundation; either
|
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* version 2.1 of the License, or (at your option) any later version.
|
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*
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* This library is distributed in the hope that it will be useful,
|
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* 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/>.
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*
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* Author: Michal Privoznik <mprivozn@redhat.com>
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*/
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#include <config.h>
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#include "testutils.h"
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#ifdef __linux__
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# include <stdlib.h>
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# include <stdio.h>
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# include <sys/types.h>
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# include <sys/stat.h>
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# include <fcntl.h>
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# include <virpci.h>
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# define VIR_FROM_THIS VIR_FROM_NONE
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static int
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testVirPCIDeviceNew(const void *opaque ATTRIBUTE_UNUSED)
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{
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int ret = -1;
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virPCIDevicePtr dev;
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const char *devName;
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if (!(dev = virPCIDeviceNew(0, 0, 0, 0)))
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goto cleanup;
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devName = virPCIDeviceGetName(dev);
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if (STRNEQ(devName, "0000:00:00.0")) {
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virReportError(VIR_ERR_INTERNAL_ERROR,
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"PCI device name mismatch: %s, expecting %s",
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devName, "0000:00:00.0");
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goto cleanup;
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}
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ret = 0;
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cleanup:
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virPCIDeviceFree(dev);
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return ret;
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}
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# define FAKESYSFSDIRTEMPLATE abs_builddir "/fakesysfsdir-XXXXXX"
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static int
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mymain(void)
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{
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int ret = 0;
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char *fakesysfsdir;
|
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|
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if (VIR_STRDUP_QUIET(fakesysfsdir, FAKESYSFSDIRTEMPLATE) < 0) {
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fprintf(stderr, "Out of memory\n");
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abort();
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}
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if (!mkdtemp(fakesysfsdir)) {
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fprintf(stderr, "Cannot create fakesysfsdir");
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abort();
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}
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setenv("LIBVIRT_FAKE_SYSFS_DIR", fakesysfsdir, 1);
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# define DO_TEST(fnc) \
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do { \
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if (virtTestRun(#fnc, fnc, NULL) < 0) \
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ret = -1; \
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} while (0)
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DO_TEST(testVirPCIDeviceNew);
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if (getenv("LIBVIRT_SKIP_CLEANUP") == NULL)
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virFileDeleteTree(fakesysfsdir);
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VIR_FREE(fakesysfsdir);
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return ret==0 ? EXIT_SUCCESS : EXIT_FAILURE;
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}
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VIRT_TEST_MAIN_PRELOAD(mymain, abs_builddir "/.libs/virpcimock.so")
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#else
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int
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main(void)
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{
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return EXIT_AM_SKIP;
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}
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#endif
|
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