[LTP] [PATCH v1] tst_filesystems01.c: Add test for .filesystems

[Wei Gao]

Fixes: https://github.com/linux-test-project/ltp/issues/1243
Signed-off-by: Wei Gao <wegao@suse.com>
---
 lib/newlib_tests/tst_filesystems01.c | 118 +++++++++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 lib/newlib_tests/tst_filesystems01.c

diff --git a/lib/newlib_tests/tst_filesystems01.c b/lib/newlib_tests/tst_filesystems01.c
new file mode 100644
index 000000000..96f4b2d93
--- /dev/null
+++ b/lib/newlib_tests/tst_filesystems01.c
@@ -0,0 +1,118 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (c) 2025 Wei Gao <wegao@suse.com>
+ */
+
+#include "tst_test.h"
+#include "tst_safe_stdio.h"
+
+#define MOUNT_POINT "mount_test_filesystems"
+
+static int check_inode_size(unsigned int size)
+{
+	char path[PATH_MAX];
+	char line[PATH_MAX];
+	FILE *tune2fs;
+	char str_size[NAME_MAX];
+
+	snprintf(str_size, sizeof(str_size), "%u", size);
+	snprintf(path, sizeof(path), "tune2fs -l %s 2>&1", tst_device->dev);
+	tune2fs = SAFE_POPEN(path, "r");
+	if (tune2fs == NULL)
+		tst_brk(TBROK, "Can not popen %s", path);
+
+	while (fgets(line, PATH_MAX, tune2fs)) {
+		if (*line && strstr(line, "Inode size:") && strstr(line, str_size)) {
+			tst_res(TPASS, "check inode size pass");
+			return 0;
+		}
+	}
+
+	pclose(tune2fs);
+	tst_res(TFAIL, "check inode size failed");
+	return -1;
+}
+
+static int check_mnt_data(char *opt)
+{
+	FILE *fp;
+	char line[PATH_MAX];
+
+	fp = SAFE_FOPEN("/proc/mounts", "r");
+	if (fp == NULL)
+		tst_brk(TBROK, "Can not open /proc/mounts");
+	while (fgets(line, PATH_MAX, fp)) {
+		if (*line && strstr(line, tst_device->dev) && strstr(line, opt)) {
+			tst_res(TPASS, "check mnt data pass");
+			return 0;
+		}
+	}
+	SAFE_FCLOSE(fp);
+	tst_res(TFAIL, "check mnt data failed");
+	return -1;
+}
+
+static int check_mkfs_size_opt(unsigned int size)
+{
+	char path[PATH_MAX];
+	char line[PATH_MAX];
+	FILE *dumpe2fs;
+	char str_size[NAME_MAX];
+
+	snprintf(str_size, sizeof(str_size), "%u", size);
+	snprintf(path, sizeof(path), "dumpe2fs -h %s 2>&1", tst_device->dev);
+	dumpe2fs = SAFE_POPEN(path, "r");
+	if (dumpe2fs == NULL)
+		tst_brk(TBROK, "Can not popen %s", path);
+
+	while (fgets(line, PATH_MAX, dumpe2fs)) {
+		if (*line && strstr(line, "Block count:") && strstr(line, str_size)) {
+			tst_res(TPASS, "check mkfs size opt pass");
+			return 0;
+		}
+	}
+
+	pclose(dumpe2fs);
+	tst_res(TFAIL, "check mkfs size opt failed");
+	return -1;
+}
+
+static void do_test(void)
+{
+	long fs_type;
+
+	fs_type = tst_fs_type(MOUNT_POINT);
+
+	if (fs_type == TST_EXT234_MAGIC) {
+		check_inode_size(128);
+		check_mkfs_size_opt(10240);
+	}
+
+	if (fs_type == TST_XFS_MAGIC)
+		check_mnt_data("usrquota");
+}
+
+static struct tst_test test = {
+	.test_all = do_test,
+	.needs_root = 1,
+	.mntpoint = MOUNT_POINT,
+	.mount_device = 1,
+	.needs_cmds = (const char *[]) {
+		"tune2fs",
+		"dumpe2fs",
+		NULL
+	},
+	.filesystems = (struct tst_fs []) {
+		{
+			.type = "ext3",
+			.mkfs_opts = (const char *const []){"-I", "128", NULL},
+			.mkfs_size_opt = "10240",
+		},
+		{
+			.type = "xfs",
+			.mnt_data = "usrquota",
+		},
+		{}
+	},
+
+};
-- 
2.49.0