diff options
Diffstat (limited to 'vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/pids.go')
-rw-r--r-- | vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/pids.go | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/pids.go b/vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/pids.go new file mode 100644 index 000000000..1f13532a5 --- /dev/null +++ b/vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs/pids.go @@ -0,0 +1,62 @@ +package fs + +import ( + "math" + "strconv" + + "github.com/opencontainers/runc/libcontainer/cgroups" + "github.com/opencontainers/runc/libcontainer/cgroups/fscommon" + "github.com/opencontainers/runc/libcontainer/configs" +) + +type PidsGroup struct{} + +func (s *PidsGroup) Name() string { + return "pids" +} + +func (s *PidsGroup) Apply(path string, _ *configs.Resources, pid int) error { + return apply(path, pid) +} + +func (s *PidsGroup) Set(path string, r *configs.Resources) error { + if r.PidsLimit != 0 { + // "max" is the fallback value. + limit := "max" + + if r.PidsLimit > 0 { + limit = strconv.FormatInt(r.PidsLimit, 10) + } + + if err := cgroups.WriteFile(path, "pids.max", limit); err != nil { + return err + } + } + + return nil +} + +func (s *PidsGroup) GetStats(path string, stats *cgroups.Stats) error { + if !cgroups.PathExists(path) { + return nil + } + current, err := fscommon.GetCgroupParamUint(path, "pids.current") + if err != nil { + return err + } + + max, err := fscommon.GetCgroupParamUint(path, "pids.max") + if err != nil { + return err + } + // If no limit is set, read from pids.max returns "max", which is + // converted to MaxUint64 by GetCgroupParamUint. Historically, we + // represent "no limit" for pids as 0, thus this conversion. + if max == math.MaxUint64 { + max = 0 + } + + stats.PidsStats.Current = current + stats.PidsStats.Limit = max + return nil +} |