[LTP] [PATCH] statx07: Skip test if NFS server is never enabled

[Li Wang]

The statx07 test requires an active NFS server, as it relies on
exportfs, which reads from '/var/lib/nfs/etab'. By default, etab
file does not exist unless the NFS server is started at least once
(since new version nfs-utils-2.5.4-32.el9).

This causing the test to fail when etab is missing:

  tst_test.c:1722: TINFO: Overall timeout per run is 0h 00m 30s
  tst_buffers.c:57: TINFO: Test is using guarded buffers
  exportfs: can't open /var/lib/nfs/etab for reading
  statx07.c:136: TBROK: failed to exportfs

This patch adds a check using access("/var/lib/nfs/etab", F_OK)
before running the test. If the file does not exist, the test
is skipped (TCONF) instead of failing, preventing misleading
test failures.

Signed-off-by: Li Wang <liwang@redhat.com>
Cc: Yongcheng Yang <yoyang@redhat.com>
---
 testcases/kernel/syscalls/statx/statx07.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/testcases/kernel/syscalls/statx/statx07.c b/testcases/kernel/syscalls/statx/statx07.c
index 968174330..bc8e6fd65 100644
--- a/testcases/kernel/syscalls/statx/statx07.c
+++ b/testcases/kernel/syscalls/statx/statx07.c
@@ -115,6 +115,9 @@ static void setup(void)
 	int ret;
 	char server_path[BUFF_SIZE];
 
+	if (access("/var/lib/nfs/etab", F_OK) < 0)
+		tst_brk(TCONF, "nfs-server might not set up");
+
 	mode_t old_umask = umask(0);
 
 	SAFE_MKDIR(SERV_PATH, DEFAULT_MODE);
-- 
2.48.1