[LTP] [PATCH v1] Skip cgroup-related tests if `/sys/fs/cgroup` readonly

[Marius Kittler <mkittler@suse.de>]

Otherwise clone303 fails with TBROK when `/sys/fs/cgroup` is mounted as
read-only which is normal in a container. The test result should better
be TCONF like it is already done in case of a permission error.

Signed-off-by: Marius Kittler <mkittler@suse.de>
---
 lib/tst_cgroup.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/tst_cgroup.c b/lib/tst_cgroup.c
index fdeac6059..5240aadaa 100644
--- a/lib/tst_cgroup.c
+++ b/lib/tst_cgroup.c
@@ -383,6 +383,9 @@ static void cgroup_dir_mk(const struct cgroup_dir *const parent,
 		tst_brk(TCONF | TERRNO,
 			"Lack permission to make '%s/%s'; premake it or run as root",
 			dpath, dir_name);
+	} else if (errno == EROFS) {
+		tst_brk(TCONF | TERRNO, "'%s/%s' must not be read-only",
+			dpath, dir_name);
 	} else {
 		tst_brk(TBROK | TERRNO,
 			"mkdirat(%d<%s>, '%s', 0777)",
-- 
2.42.0


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