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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) 2017 Cyril Hrubis <chrubis@suse.cz>
*/
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <sys/mount.h>
#include <sys/wait.h>
#define TST_NO_DEFAULT_MAIN
#include "tst_test.h"
#include "tst_fs.h"
static const char *const fs_type_whitelist[] = {
"ext2",
"ext3",
"ext4",
"xfs",
"btrfs",
"vfat",
"exfat",
"ntfs",
NULL
};
static const char *fs_types[ARRAY_SIZE(fs_type_whitelist)];
static int has_mkfs(const char *fs_type)
{
char buf[128];
int ret;
sprintf(buf, "mkfs.%s >/dev/null 2>&1", fs_type);
ret = tst_system(buf);
if (WEXITSTATUS(ret) == 127) {
tst_res(TINFO, "mkfs.%s does not exist", fs_type);
return 0;
}
tst_res(TINFO, "mkfs.%s does exist", fs_type);
return 1;
}
static int has_kernel_support(const char *fs_type, int flags)
{
static int fuse_supported = -1;
const char *tmpdir = getenv("TMPDIR");
char buf[128];
int ret;
if (!tmpdir)
tmpdir = "/tmp";
mount("/dev/zero", tmpdir, fs_type, 0, NULL);
if (errno != ENODEV) {
tst_res(TINFO, "Kernel supports %s", fs_type);
return 1;
}
/* Is FUSE supported by kernel? */
if (fuse_supported == -1) {
ret = open("/dev/fuse", O_RDWR);
if (ret < 0) {
fuse_supported = 0;
} else {
fuse_supported = 1;
SAFE_CLOSE(ret);
}
}
if (!fuse_supported)
return 0;
/* Is FUSE implementation installed? */
sprintf(buf, "mount.%s >/dev/null 2>&1", fs_type);
ret = tst_system(buf);
if (WEXITSTATUS(ret) == 127) {
tst_res(TINFO, "Filesystem %s is not supported", fs_type);
return 0;
}
if (flags & TST_FS_SKIP_FUSE) {
tst_res(TINFO, "Skipping FUSE as requested by the test");
return 0;
}
tst_res(TINFO, "FUSE does support %s", fs_type);
return 1;
}
int tst_fs_is_supported(const char *fs_type, int flags)
{
return has_kernel_support(fs_type, flags) && has_mkfs(fs_type);
}
const char **tst_get_supported_fs_types(int flags)
{
unsigned int i, j = 0;
for (i = 0; fs_type_whitelist[i]; i++) {
if (tst_fs_is_supported(fs_type_whitelist[i], flags))
fs_types[j++] = fs_type_whitelist[i];
}
return fs_types;
}
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