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libvirt/tests/virfiletest.c

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/*
* Copyright (C) 2013 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 <fcntl.h>
#include <unistd.h>
#include "testutils.h"
#include "virfile.h"
#ifdef __linux__
# include <linux/falloc.h>
#endif
#define VIR_FROM_THIS VIR_FROM_NONE
#if defined WITH_MNTENT_H && defined WITH_GETMNTENT_R
static int testFileCheckMounts(const char *prefix,
char **gotmounts,
size_t gotnmounts,
const char *const*wantmounts,
size_t wantnmounts)
{
size_t i;
if (gotnmounts != wantnmounts) {
fprintf(stderr, "Expected %zu mounts under %s, but got %zu\n",
wantnmounts, prefix, gotnmounts);
return -1;
}
for (i = 0; i < gotnmounts; i++) {
if (STRNEQ(gotmounts[i], wantmounts[i])) {
fprintf(stderr, "Expected mount[%zu] '%s' but got '%s'\n",
i, wantmounts[i], gotmounts[i]);
return -1;
}
}
return 0;
}
struct testFileGetMountSubtreeData {
const char *path;
const char *prefix;
const char *const *mounts;
size_t nmounts;
bool rev;
};
static int testFileGetMountSubtree(const void *opaque)
{
g_auto(GStrv) gotmounts = NULL;
size_t gotnmounts = 0;
const struct testFileGetMountSubtreeData *data = opaque;
if (data->rev) {
if (virFileGetMountReverseSubtree(data->path,
data->prefix,
&gotmounts,
&gotnmounts) < 0)
return -1;
} else {
if (virFileGetMountSubtree(data->path,
data->prefix,
&gotmounts,
&gotnmounts) < 0)
return -1;
}
return testFileCheckMounts(data->prefix,
gotmounts, gotnmounts,
data->mounts, data->nmounts);
}
#endif /* ! defined WITH_MNTENT_H && defined WITH_GETMNTENT_R */
struct testFileSanitizePathData
{
const char *path;
const char *expect;
};
static int
testFileSanitizePath(const void *opaque)
{
const struct testFileSanitizePathData *data = opaque;
g_autofree char *actual = NULL;
if (!(actual = virFileSanitizePath(data->path)))
return -1;
if (STRNEQ(actual, data->expect)) {
fprintf(stderr, "\nexpect: '%s'\nactual: '%s'\n", data->expect, actual);
return -1;
}
return 0;
}
#if WITH_DECL_SEEK_HOLE && defined(__linux__)
/* Create a sparse file. @offsets in KiB. */
static int
makeSparseFile(const off_t offsets[],
const bool startData)
{
int fd = -1;
char path[] = abs_builddir "fileInData.XXXXXX";
off_t len = 0;
size_t i;
if ((fd = g_mkstemp_full(path, O_RDWR | O_CLOEXEC, S_IRUSR | S_IWUSR)) < 0)
goto error;
if (unlink(path) < 0)
goto error;
for (i = 0; offsets[i] != (off_t) -1; i++)
len += offsets[i] * 1024;
while (len) {
const char buf[] = "abcdefghijklmnopqrstuvwxyz";
off_t toWrite = sizeof(buf);
if (toWrite > len)
toWrite = len;
if (safewrite(fd, buf, toWrite) < 0) {
fprintf(stderr, "unable to write to %s (errno=%d)\n", path, errno);
goto error;
}
len -= toWrite;
}
len = 0;
for (i = 0; offsets[i] != (off_t) -1; i++) {
bool inData = startData;
if (i % 2)
inData = !inData;
if (!inData &&
fallocate(fd,
FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
len, offsets[i] * 1024) < 0) {
fprintf(stderr, "unable to punch a hole at offset %lld length %lld\n",
(long long) len, (long long) offsets[i]);
goto error;
}
len += offsets[i] * 1024;
}
if (lseek(fd, 0, SEEK_SET) == (off_t) -1) {
fprintf(stderr, "unable to lseek (errno=%d)\n", errno);
goto error;
}
return fd;
error:
VIR_FORCE_CLOSE(fd);
return -1;
}
# define EXTENT 4
static bool
holesSupported(void)
{
off_t offsets[] = {EXTENT, EXTENT, EXTENT, -1};
off_t tmp;
VIR_AUTOCLOSE fd = -1;
if ((fd = makeSparseFile(offsets, true)) < 0)
return false;
/* The way this works is: there are 4K of data followed by 4K hole followed
* by 4K hole again. Check if the filesystem we are running the test suite
* on supports holes. */
if ((tmp = lseek(fd, 0, SEEK_DATA)) == (off_t) -1)
return false;
if (tmp != 0)
return false;
if ((tmp = lseek(fd, tmp, SEEK_HOLE)) == (off_t) -1)
return false;
if (tmp != EXTENT * 1024)
return false;
if ((tmp = lseek(fd, tmp, SEEK_DATA)) == (off_t) -1)
return false;
if (tmp != 2 * EXTENT * 1024)
return false;
if ((tmp = lseek(fd, tmp, SEEK_HOLE)) == (off_t) -1)
return false;
if (tmp != 3 * EXTENT * 1024)
return false;
return true;
}
#else /* !WITH_DECL_SEEK_HOLE || !defined(__linux__)*/
static int
makeSparseFile(const off_t offsets[] G_GNUC_UNUSED,
const bool startData G_GNUC_UNUSED)
{
return -1;
}
static bool
holesSupported(void)
{
return false;
}
#endif /* !WITH_DECL_SEEK_HOLE || !defined(__linux__)*/
struct testFileInData {
bool startData; /* whether the list of offsets starts with data section */
off_t *offsets;
};
static int
testFileInData(const void *opaque)
{
const struct testFileInData *data = opaque;
VIR_AUTOCLOSE fd = -1;
size_t i;
if ((fd = makeSparseFile(data->offsets, data->startData)) < 0)
return -1;
for (i = 0; data->offsets[i] != (off_t) -1; i++) {
bool shouldInData = data->startData;
int realInData;
long long shouldLen;
long long realLen;
if (i % 2)
shouldInData = !shouldInData;
if (virFileInData(fd, &realInData, &realLen) < 0)
return -1;
if (realInData != shouldInData) {
fprintf(stderr, "Unexpected data/hole. Expected %s got %s\n",
shouldInData ? "data" : "hole",
realInData ? "data" : "hole");
return -1;
}
shouldLen = data->offsets[i] * 1024;
if (realLen != shouldLen) {
fprintf(stderr, "Unexpected section length. Expected %lld got %lld\n",
shouldLen, realLen);
return -1;
}
if (lseek(fd, shouldLen, SEEK_CUR) < 0) {
fprintf(stderr, "Unable to seek\n");
return -1;
}
}
return 0;
}
struct testFileIsSharedFSType {
const char *mtabFile;
const char *filename;
const bool expected;
};
static int
testFileIsSharedFSType(const void *opaque G_GNUC_UNUSED)
{
#ifndef __linux__
return EXIT_AM_SKIP;
#else
const struct testFileIsSharedFSType *data = opaque;
g_autofree char *mtabFile = NULL;
bool actual;
int ret = -1;
mtabFile = g_strdup_printf(abs_srcdir "/virfiledata/%s", data->mtabFile);
if (g_setenv("LIBVIRT_MTAB", mtabFile, TRUE) == FALSE) {
fprintf(stderr, "Unable to set env variable\n");
goto cleanup;
}
actual = virFileIsSharedFS(data->filename);
if (actual != data->expected) {
fprintf(stderr, "Unexpected FS type. Expected %d got %d\n",
data->expected, actual);
goto cleanup;
}
ret = 0;
cleanup:
g_unsetenv("LIBVIRT_MTAB");
return ret;
#endif
}
static int
mymain(void)
{
int ret = 0;
struct testFileSanitizePathData data1;
#if defined WITH_MNTENT_H && defined WITH_GETMNTENT_R
# define MTAB_PATH1 abs_srcdir "/virfiledata/mounts1.txt"
# define MTAB_PATH2 abs_srcdir "/virfiledata/mounts2.txt"
static const char *wantmounts1[] = {
"/proc", "/proc/sys/fs/binfmt_misc", "/proc/sys/fs/binfmt_misc",
};
static const char *wantmounts1rev[] = {
"/proc/sys/fs/binfmt_misc", "/proc/sys/fs/binfmt_misc", "/proc"
};
static const char *wantmounts2a[] = {
"/etc/aliases"
};
static const char *wantmounts2b[] = {
"/etc/aliases.db"
};
# define DO_TEST_MOUNT_SUBTREE(name, path, prefix, mounts, rev) \
do { \
struct testFileGetMountSubtreeData data = { \
path, prefix, mounts, G_N_ELEMENTS(mounts), rev \
}; \
if (virTestRun(name, testFileGetMountSubtree, &data) < 0) \
ret = -1; \
} while (0)
DO_TEST_MOUNT_SUBTREE("/proc normal", MTAB_PATH1, "/proc", wantmounts1, false);
DO_TEST_MOUNT_SUBTREE("/proc reverse", MTAB_PATH1, "/proc", wantmounts1rev, true);
DO_TEST_MOUNT_SUBTREE("/etc/aliases", MTAB_PATH2, "/etc/aliases", wantmounts2a, false);
DO_TEST_MOUNT_SUBTREE("/etc/aliases.db", MTAB_PATH2, "/etc/aliases.db", wantmounts2b, false);
#endif /* ! defined WITH_MNTENT_H && defined WITH_GETMNTENT_R */
#define DO_TEST_SANITIZE_PATH(PATH, EXPECT) \
do { \
data1.path = PATH; \
data1.expect = EXPECT; \
if (virTestRun(virTestCounterNext(), testFileSanitizePath, \
&data1) < 0) \
ret = -1; \
} while (0)
#define DO_TEST_SANITIZE_PATH_SAME(PATH) DO_TEST_SANITIZE_PATH(PATH, PATH)
virTestCounterReset("testFileSanitizePath ");
DO_TEST_SANITIZE_PATH("", "");
DO_TEST_SANITIZE_PATH("/", "/");
DO_TEST_SANITIZE_PATH("/path", "/path");
DO_TEST_SANITIZE_PATH("/path/to/blah", "/path/to/blah");
DO_TEST_SANITIZE_PATH("/path/", "/path");
DO_TEST_SANITIZE_PATH("///////", "/");
DO_TEST_SANITIZE_PATH("//", "//");
DO_TEST_SANITIZE_PATH(".", ".");
DO_TEST_SANITIZE_PATH("../", "..");
DO_TEST_SANITIZE_PATH("../../", "../..");
DO_TEST_SANITIZE_PATH("//foo//bar", "//foo/bar");
DO_TEST_SANITIZE_PATH("/bar//foo", "/bar/foo");
DO_TEST_SANITIZE_PATH_SAME("gluster://bar.baz/foo/hoo");
DO_TEST_SANITIZE_PATH_SAME("gluster://bar.baz//fooo/hoo");
DO_TEST_SANITIZE_PATH_SAME("gluster://bar.baz//////fooo/hoo");
DO_TEST_SANITIZE_PATH_SAME("gluster://bar.baz/fooo//hoo");
DO_TEST_SANITIZE_PATH_SAME("gluster://bar.baz/fooo///////hoo");
#define DO_TEST_IN_DATA(inData, ...) \
do { \
off_t offsets[] = {__VA_ARGS__, -1}; \
struct testFileInData data = { \
.startData = inData, .offsets = offsets, \
}; \
if (virTestRun(virTestCounterNext(), testFileInData, &data) < 0) \
ret = -1; \
} while (0)
if (holesSupported()) {
virTestCounterReset("testFileInData ");
DO_TEST_IN_DATA(true, 4, 4, 4);
DO_TEST_IN_DATA(false, 4, 4, 4);
DO_TEST_IN_DATA(true, 8, 8, 8);
DO_TEST_IN_DATA(false, 8, 8, 8);
DO_TEST_IN_DATA(true, 8, 16, 32, 64, 128, 256, 512);
DO_TEST_IN_DATA(false, 8, 16, 32, 64, 128, 256, 512);
}
#define DO_TEST_FILE_IS_SHARED_FS_TYPE(mtab, file, exp) \
do { \
struct testFileIsSharedFSType data = { \
.mtabFile = mtab, .filename = file, .expected = exp \
}; \
if (virTestRun(virTestCounterNext(), testFileIsSharedFSType, &data) < 0) \
ret = -1; \
} while (0)
virTestCounterReset("testFileIsSharedFSType ");
DO_TEST_FILE_IS_SHARED_FS_TYPE("mounts1.txt", "/boot/vmlinuz", false);
DO_TEST_FILE_IS_SHARED_FS_TYPE("mounts2.txt", "/run/user/501/gvfs/some/file", false);
DO_TEST_FILE_IS_SHARED_FS_TYPE("mounts3.txt", "/nfs/file", true);
DO_TEST_FILE_IS_SHARED_FS_TYPE("mounts3.txt", "/nfs/blah", false);
DO_TEST_FILE_IS_SHARED_FS_TYPE("mounts3.txt", "/gluster/file", true);
DO_TEST_FILE_IS_SHARED_FS_TYPE("mounts3.txt", "/gluster/sshfs/file", false);
DO_TEST_FILE_IS_SHARED_FS_TYPE("mounts3.txt", "/some/symlink/file", true);
DO_TEST_FILE_IS_SHARED_FS_TYPE("mounts3.txt", "/ceph/file", true);
DO_TEST_FILE_IS_SHARED_FS_TYPE("mounts3.txt", "/ceph/multi/file", true);
DO_TEST_FILE_IS_SHARED_FS_TYPE("mounts3.txt", "/gpfs/data", true);
DO_TEST_FILE_IS_SHARED_FS_TYPE("mounts3.txt", "/quobyte", true);
return ret != 0 ? EXIT_FAILURE : EXIT_SUCCESS;
}
#ifdef __linux__
VIR_TEST_MAIN_PRELOAD(mymain, VIR_TEST_MOCK("virfile"))
#else
VIR_TEST_MAIN(mymain)
#endif
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