Check in gVisor.

PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463

1 files changed, 60 insertions, 0 deletions

diff --git a/runsc/boot/limits.go b/runsc/boot/limits.go
new file mode 100644
index 000000000..ea72de8e9
--- /dev/null
+++ b/runsc/boot/limits.go
@@ -0,0 +1,60 @@
+// Copyright 2018 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package boot
+
+import (
+	"fmt"
+
+	specs "github.com/opencontainers/runtime-spec/specs-go"
+	"gvisor.googlesource.com/gvisor/pkg/sentry/limits"
+)
+
+// Mapping from linux resource names to limits.LimitType.
+var fromLinuxResource = map[string]limits.LimitType{
+	"RLIMIT_CPU":        limits.CPU,
+	"RLIMIT_FSIZE":      limits.FileSize,
+	"RLIMIT_DATA":       limits.Data,
+	"RLIMIT_STACK":      limits.Stack,
+	"RLIMIT_CORE":       limits.Core,
+	"RLIMIT_RSS":        limits.Rss,
+	"RLIMIT_NPROC":      limits.ProcessCount,
+	"RLIMIT_NOFILE":     limits.NumberOfFiles,
+	"RLIMIT_MEMLOCK":    limits.MemoryPagesLocked,
+	"RLIMIT_AS":         limits.AS,
+	"RLIMIT_LOCKS":      limits.Locks,
+	"RLIMIT_SIGPENDING": limits.SignalsPending,
+	"RLIMIT_MSGQUEUE":   limits.MessageQueueBytes,
+	"RLIMIT_NICE":       limits.Nice,
+	"RLIMIT_RTPRIO":     limits.RealTimePriority,
+	"RLIMIT_RTTIME":     limits.Rttime,
+}
+
+func createLimitSet(spec *specs.Spec) (*limits.LimitSet, error) {
+	ls, err := limits.NewLinuxDistroLimitSet()
+	if err != nil {
+		return nil, err
+	}
+	for _, rl := range spec.Process.Rlimits {
+		lt, ok := fromLinuxResource[rl.Type]
+		if !ok {
+			return nil, fmt.Errorf("unknown resource %q", rl.Type)
+		}
+		ls.SetUnchecked(lt, limits.Limit{
+			Cur: rl.Soft,
+			Max: rl.Hard,
+		})
+	}
+	return ls, nil
+}