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cg_unified_cached: return ENOMEDIUM if we cannot find a known hierarchy

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When the test suite is being run in a foreign environment,
/sys/fs/cgroup might not be set up in a way that we recognize.
Returning ENOMEDIUM causes the tests to be skipped in this case.

Bug: https://bugs.gentoo.org/771819
This commit is contained in:
Mike Gilbert 2021-03-09 17:57:37 -05:00 committed by Lennart Poettering
parent fa92d38428
commit 2156061fb3
1 changed files with 7 additions and 1 deletions
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8
src/basic/cgroup-util.c
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@ -2052,8 +2052,14 @@ int cg_unified_cached(bool flush) {
unified_cache = CGROUP_UNIFIED_SYSTEMD;
unified_systemd_v232 = false;
} else {
if (statfs("/sys/fs/cgroup/systemd/", &fs) < 0)
if (statfs("/sys/fs/cgroup/systemd/", &fs) < 0) {
if (errno == ENOENT) {
/* Some other software may have set up /sys/fs/cgroup in a configuration we do not recognize. */
log_debug_errno(errno, "Unsupported cgroupsv1 setup detected: name=systemd hierarchy not found.");
return -ENOMEDIUM;
}
return log_debug_errno(errno, "statfs(\"/sys/fs/cgroup/systemd\" failed: %m");
}
if (F_TYPE_EQUAL(fs.f_type, CGROUP2_SUPER_MAGIC)) {
log_debug("Found cgroup2 on /sys/fs/cgroup/systemd, unified hierarchy for systemd controller (v232 variant)");