From 19106da5ad20c3b46888a75b08c00d0b0b12e13b Mon Sep 17 00:00:00 2001
From: jingrui <jingrui@huawei.com>
Date: Wed, 23 Jan 2019 22:40:51 +0800
Subject: [PATCH 84/94] oci:  fix runc panic and support oom score

reason: see below.

1. docker plugin using simple spec, should add more check to avoid runc
   panic.
2. add oom-score support.

Change-Id: I0999c8f61209e8127390508577034446d9ae1b4f
Signed-off-by: jingrui <jingrui@huawei.com>
---
 script/runc-euleros.spec |  2 +-
 spec.go                  | 39 ++++++++++++++++++++++++++++++++++++---
 2 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/script/runc-euleros.spec b/script/runc-euleros.spec
index faccbf6..bcbcff1 100644
--- a/script/runc-euleros.spec
+++ b/script/runc-euleros.spec
@@ -2,7 +2,7 @@
 
 Name: docker-runc
 Version: 1.0.0.rc3
-Release: 17%{?dist}
+Release: 18%{?dist}
 Summary: runc is a CLI tool for spawning and running containers according to the OCF specification
 
 License: ASL 2.0
diff --git a/spec.go b/spec.go
index 0bbe967..3b90791 100644
--- a/spec.go
+++ b/spec.go
@@ -118,7 +118,8 @@ func sPtr(s string) *string { return &s }
 
 type compatSpec struct {
 	specs.Spec
-	Linux *linux `json:"linux,omitempty" platform:"linux"`
+	Linux   *linux     `json:"linux,omitempty" platform:"linux"`
+	Process processRc6 `json:"process"`
 }
 
 // linuxBlockIODevice holds major:minor format supported in blkio cgroup
@@ -150,6 +151,11 @@ type linux struct {
 	Resources *linuxResources `json:"resources,omitempty"`
 }
 
+type processRc6 struct {
+	specs.Process
+	OOMScoreAdj *int `json:"oomScoreAdj,omitempty" platform:"linux"`
+}
+
 type linuxResources struct {
 	specs.LinuxResources
 	Memory  *linuxMemory  `json:"memory,omitempty"`
@@ -191,10 +197,26 @@ type linuxMemory struct {
 	DisableOOMKiller *bool `json:"disableOOMKiller,omitempty"`
 }
 
+func versionRc6Plus(ver string) bool {
+	if len(ver) < 5 {		// version should be a.b.c[-rcn][x]
+		return false
+	}
+
+	// docker-18.09		1.0.1
+	if ver[:5] >= "1.0.1" {
+		return true
+	}
+
+	// TODO: add more version detect, support ab.cd.ef format.
+
+	// < 1.0.0-rc6: include 1.0.0-rc5xxx
+	return false
+}
+
 // loadSpec loads the specification from the provided path.
 func loadSpec(cPath string) (spec *specs.Spec, err error) {
 	spec, err = loadOriginSpec(cPath)
-	if err != nil || spec.Linux.Resources.DisableOOMKiller == nil {
+	if err != nil || versionRc6Plus(spec.Version) {
 		return loadCompactSpec(cPath)
 	}
 
@@ -251,7 +273,18 @@ func updateCompactSpec(compatSpec *compatSpec) (*specs.Spec, error) {
 		return nil, fmt.Errorf("update config failed %v", err)
 	}
 
-	spec.Linux.Resources.DisableOOMKiller = compatSpec.Linux.Resources.Memory.DisableOOMKiller
+	if compatSpec != nil && compatSpec.Linux != nil &&
+		compatSpec.Linux.Resources != nil &&
+		compatSpec.Linux.Resources.Memory != nil &&
+		compatSpec.Linux.Resources.Memory.DisableOOMKiller != nil {
+		spec.Linux.Resources.DisableOOMKiller = compatSpec.Linux.Resources.Memory.DisableOOMKiller
+	}
+
+	if compatSpec != nil && compatSpec.Process.OOMScoreAdj != nil &&
+		spec.Linux != nil && spec.Linux.Resources != nil {
+		spec.Linux.Resources.OOMScoreAdj = compatSpec.Process.OOMScoreAdj
+	}
+
 	if compatSpec.Linux.Resources.BlockIO != nil {
 		spec.Linux.Resources.BlockIO.Weight = compatSpec.Linux.Resources.BlockIO.Weight
 		spec.Linux.Resources.BlockIO.LeafWeight = compatSpec.Linux.Resources.BlockIO.LeafWeight
-- 
2.7.4.3