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authorGiuseppe Scrivano <gscrivan@redhat.com>2019-05-10 16:20:55 +0200
committerGiuseppe Scrivano <gscrivan@redhat.com>2019-05-13 10:48:16 +0200
commit8e88461511e81d2327e4c1a1315bb58fda1827ca (patch)
tree6c70b602f48ab8eaf8e327a314b929eb5bebd22a /pkg/util/utils_supported.go
parentd2571c7fd49d22e822a6f3b3796488218c9f9e46 (diff)
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rootless, spec: allow resources with cgroup v2
We were always raising an error when the rootless user attempted to setup resources, but this is not the case anymore with cgroup v2. Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
Diffstat (limited to 'pkg/util/utils_supported.go')
-rw-r--r--pkg/util/utils_supported.go24
1 files changed, 24 insertions, 0 deletions
diff --git a/pkg/util/utils_supported.go b/pkg/util/utils_supported.go
index af5e67fc1..8b98658c2 100644
--- a/pkg/util/utils_supported.go
+++ b/pkg/util/utils_supported.go
@@ -11,9 +11,33 @@ import (
"github.com/pkg/errors"
"os"
"path/filepath"
+ "sync"
"syscall"
)
+const (
+ _cgroup2SuperMagic = 0x63677270
+)
+
+var (
+ isUnifiedOnce sync.Once
+ isUnified bool
+ isUnifiedErr error
+)
+
+// IsCgroup2UnifiedMode returns whether we are running in cgroup 2 unified mode.
+func IsCgroup2UnifiedMode() (bool, error) {
+ isUnifiedOnce.Do(func() {
+ var st syscall.Statfs_t
+ if err := syscall.Statfs("/sys/fs/cgroup", &st); err != nil {
+ isUnified, isUnifiedErr = false, err
+ } else {
+ isUnified, isUnifiedErr = st.Type == _cgroup2SuperMagic, nil
+ }
+ })
+ return isUnified, isUnifiedErr
+}
+
// GetRootlessRuntimeDir returns the runtime directory when running as non root
func GetRootlessRuntimeDir() (string, error) {
var rootlessRuntimeDirError error