remove kernel limit for id mappings

Ma Shimiao · Ma Shimiao · commit e7ee76106f13 · 2017-12-02T13:42:51.000+08:00
the limit depends on different kernel version
and not definitely required by spec

Signed-off-by: Ma Shimiao &lt;mashimiao.fnst@cn.fujitsu.com&gt;
diff --git a/validate/validate.go b/validate/validate.go
@@ -615,10 +615,6 @@ func (v *Validator) CheckLinux() (errs error) {
 
 	if (len(v.spec.Linux.UIDMappings) > 0 || len(v.spec.Linux.GIDMappings) > 0) && !nsTypeList[rspec.UserNamespace].newExist {
 		errs = multierror.Append(errs, errors.New("the UID/GID mappings requires a new User namespace to be specified as well"))
-	} else if len(v.spec.Linux.UIDMappings) > 5 {
-		errs = multierror.Append(errs, errors.New("only 5 UID mappings are allowed (linux kernel restriction)"))
-	} else if len(v.spec.Linux.GIDMappings) > 5 {
-		errs = multierror.Append(errs, errors.New("only 5 GID mappings are allowed (linux kernel restriction)"))
 	}
 
 	for k := range v.spec.Linux.Sysctl {

Original file line number	Diff line number	Diff line change
`@@ -615,10 +615,6 @@ func (v *Validator) CheckLinux() (errs error) {`
`615`	`615`
`616`	`616`	`if (len(v.spec.Linux.UIDMappings) > 0 \|\| len(v.spec.Linux.GIDMappings) > 0) && !nsTypeList[rspec.UserNamespace].newExist {`
`617`	`617`	`errs = multierror.Append(errs, errors.New("the UID/GID mappings requires a new User namespace to be specified as well"))`
`618`		`- } else if len(v.spec.Linux.UIDMappings) > 5 {`
`619`		`- errs = multierror.Append(errs, errors.New("only 5 UID mappings are allowed (linux kernel restriction)"))`
`620`		`- } else if len(v.spec.Linux.GIDMappings) > 5 {`
`621`		`- errs = multierror.Append(errs, errors.New("only 5 GID mappings are allowed (linux kernel restriction)"))`
`622`	`618`	`}`
`623`	`619`
`624`	`620`	`for k := range v.spec.Linux.Sysctl {`