How to setup nvme-loop with multipath

[Dongli Zhang <dongli.zhang@oracle.com>]

Hi nvme developers,

Would you please help confirm if it is feasible to support multi-path (indeed
shared namespace as id->cmic is always set for nvme-over-fabric) for nvme-loop
so that we would be able to have much more complex topology configuration for
nvme multi-path.

Below is my sample json file. While both disk1.img and disk2.img are belong to
'testnqn', disk3.img is belong to 'testnqn2'.

Is there any way to have disk2.img as shared namespace used by both 'testnqn'
and 'testnqn2'?

Thank you very much!


{
  "hosts": [
    {
      "nqn": "hostnqn"
    }
  ], 
  "ports": [
    {
      "addr": {
        "adrfam": "", 
        "traddr": "", 
        "treq": "not specified", 
        "trsvcid": "", 
        "trtype": "loop"
      }, 
      "portid": 1, 
      "referrals": [], 
      "subsystems": [
        "testnqn",
        "testnqn2"
      ]
    }
  ], 
  "subsystems": [
    {
      "allowed_hosts": [
        "hostnqn"
      ], 
      "attr": {
        "allow_any_host": "0"
      }, 
      "namespaces": [
        {
          "device": {
            "nguid": "ef90689c-6c46-d44c-89c1-4067801309a8", 
            "path": "/home/test/disk1.img"
          }, 
          "enable": 1, 
          "nsid": 1
        },
	{
          "device": {
            "nguid": "ef90689c-6c46-d44c-89c1-4067801309a2", 
            "path": "/home/test/disk2.img"
          }, 
          "enable": 1, 
          "nsid": 2
        }
      ], 
      "nqn": "testnqn"
    },
    {
      "allowed_hosts": [
        "hostnqn"
      ], 
      "attr": {
        "allow_any_host": "0"
      }, 
      "namespaces": [
	{
          "device": {
            "nguid": "ef90689c-6c46-d44c-89c1-4067801309a3", 
            "path": "/home/test/disk3.img"
          }, 
          "enable": 1, 
          "nsid": 1
        }
      ], 
      "nqn": "testnqn2"
    }
  ]
}

Dongli Zhang

_______________________________________________
linux-nvme mailing list
linux-nvme@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-nvme