1 files changed, 111 insertions, 0 deletions
diff --git a/src/kernel/tests/lib/tst_supported_fs_types.c b/src/kernel/tests/lib/tst_supported_fs_types.c
new file mode 100644
index 0000000..00ede54
--- /dev/null
+++ b/src/kernel/tests/lib/tst_supported_fs_types.c
@@ -0,0 +1,111 @@
+// 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;
+}