istio.io/istio@v0.0.0-20240520182934-d79c90f27776/cni/pkg/nodeagent/netns_linux_test.go (about)

     1  // Copyright Istio Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package nodeagent
    16  
    17  import "testing"
    18  
    19  func TestOpenNetns(t *testing.T) {
    20  	ns, err := OpenNetns("/proc/self/ns/net")
    21  	if err != nil {
    22  		t.Fatalf("unexpected error: %v", err)
    23  	}
    24  	// the inode for netns is proc dynamic, so it needs to be higher than
    25  	// #define PROC_DYNAMIC_FIRST 0xF0000000U
    26  
    27  	if ns.Inode() < 0xF0000000 {
    28  		t.Fatalf("unexpected inode: %v", ns.Inode())
    29  	}
    30  	defer ns.Close()
    31  }