[LTP] [PATCH] tst_test: Add TCONF when no required filesystems are available

[Li Wang]

Currently, when no required filesystems (filesystem[i].type) are available,
the test silently does nothing, leading to a misleading test summary.

This patch adds a check to issue TCONF when no valid filesystems are found,
ensuring clearer test results.

  # ./ioctl_ficlone03
  tst_buffers.c:57: TINFO: Test is using guarded buffers
  tst_tmpdir.c:317: TINFO: Using /tmp/LTP_iocSKLS9l as tmpdir (tmpfs filesystem)
  tst_device.c:99: TINFO: Found free device 0 '/dev/loop0'
  tst_test.c:1900: TINFO: LTP version: 20250130-166-g17960d952
  tst_test.c:1904: TINFO: Tested kernel: 4.5.0-00002-g22bd332f11d4 #162 SMP Thu Mar 20 18:00:10 CET 2025 x86_64
  tst_kconfig.c:88: TINFO: Parsing kernel config '/.config'
  tst_test.c:1724: TINFO: Overall timeout per run is 0h 00m 31s
  tst_supported_fs_types.c:97: TINFO: Kernel supports ext2
  tst_supported_fs_types.c:62: TINFO: mkfs.ext2 does exist
  tst_supported_fs_types.c:97: TINFO: Kernel supports ext3
  tst_supported_fs_types.c:62: TINFO: mkfs.ext3 does exist
  tst_supported_fs_types.c:97: TINFO: Kernel supports ext4
  tst_supported_fs_types.c:62: TINFO: mkfs.ext4 does exist
  tst_supported_fs_types.c:105: TINFO: Skipping bcachefs because of FUSE blacklist
  tst_supported_fs_types.c:97: TINFO: Kernel supports vfat
  tst_supported_fs_types.c:62: TINFO: mkfs.vfat does exist
  tst_supported_fs_types.c:97: TINFO: Kernel supports tmpfs
  tst_supported_fs_types.c:49: TINFO: mkfs is not needed for tmpfs

  Summary:
  passed   0
  failed   0
  broken   0
  skipped  0
  warnings 0

Reported-by: Petr Vorel <pvorel@suse.cz>
Signed-off-by: Li Wang <liwang@redhat.com>
---
 lib/tst_test.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/tst_test.c b/lib/tst_test.c
index 3823ea109..9a23cd4a0 100644
--- a/lib/tst_test.c
+++ b/lib/tst_test.c
@@ -1855,6 +1855,7 @@ static int run_tcases_per_fs(void)
 {
 	int ret = 0;
 	unsigned int i;
+	bool found_valid_fs = false;
 	const char *const *filesystems = tst_get_supported_fs_types(tst_test->skip_filesystems);
 
 	if (!filesystems[0])
@@ -1866,6 +1867,7 @@ static int run_tcases_per_fs(void)
 		if (!fs)
 			continue;
 
+		found_valid_fs = true;
 		ret = run_tcase_on_fs(fs, filesystems[i]);
 
 		if (ret == TCONF)
@@ -1877,6 +1879,9 @@ static int run_tcases_per_fs(void)
 		do_exit(ret);
 	}
 
+	if (!found_valid_fs)
+		tst_brk(TCONF, "No required filesystems are available");
+
 	return ret;
 }
 
-- 
2.48.1