[WIP] contrib: add remote target setup/cleanup script

Use nvmetcli to setup/cleanup a remote soft target.

Signed-off-by: Daniel Wagner <dwagner@suse.de>

contrib/nvme_target_control.py

@@ -0,0 +1,81 @@
+#!/usr/bin/env python3
+
+import argparse
+import subprocess
+from jinja2 import Environment, FileSystemLoader
+
+
+nvmetcli='/home/wagi/work/nvmetcli/nvmetcli'
+remote='http://nvmet:5000'
+
+
+def gen_conf(conf):
+	environment = Environment(loader=FileSystemLoader('.'))
+	template = environment.get_template('nvmet-subsys.jinja2')
+	filename = f'{conf["subsysnqn"]}.json'
+	content = template.render(conf)
+	with open(filename, mode='w', encoding='utf-8') as outfile:
+		outfile.write(content)
+
+
+def target_setup(args):
+	conf = {
+		'subsysnqn': args.subsysnqn,
+		'subsys_uuid': args.subsys_uuid,
+		'hostnqn': args.hostnqn,
+		'allowed_hosts': args.hostnqn,
+		'ctrlkey': args.ctrlkey,
+		'hostkey': args.hostkey,
+		'blkdev': '/dev/vdc'
+	}
+
+	gen_conf(conf)
+
+	subprocess.call(['python3', nvmetcli, '--remote=' + remote,
+					 'restore', args.subsysnqn + '.json'])
+
+
+def target_cleanup(args):
+	subprocess.call(['python3', nvmetcli, '--remote=' + remote,
+					 'clear', args.subsysnqn + '.json'])
+
+
+def build_parser():
+	parser = argparse.ArgumentParser()
+	sub = parser.add_subparsers(required=True)
+
+	setup = sub.add_parser('setup')
+	setup.add_argument('--subsysnqn', required=True)
+	setup.add_argument('--subsys-uuid', required=True)
+	setup.add_argument('--hostnqn', required=True)
+	setup.add_argument('--ctrlkey', default='')
+	setup.add_argument('--hostkey', default='')
+	setup.set_defaults(func=target_setup)
+
+	cleanup = sub.add_parser('cleanup')
+	cleanup.add_argument('--subsysnqn', required=True)
+	cleanup.set_defaults(func=target_cleanup)
+
+	return parser
+
+
+def test():
+	import pdb
+
+	pdb.set_trace()
+
+	parser = build_parser()
+	args = parser.parse_args('setup --subsysnqn blktests-subsystem-1 --subsys-uuid 91fdba0d-f87b-4c25-b80f-db7be1418b9e --blkdev=/dev/vdb'.split())
+	args.func(args)
+
+
+def main():
+	import sys
+
+	parser = build_parser()
+	args = parser.parse_args()
+	args.func(args)
+
+
+if __name__ == '__main__':
+	main()

contrib/nvmet-subsys.jinja2

@@ -0,0 +1,71 @@
+{
+  "hosts": [
+    {
+      "nqn": "{{ hostnqn }}"
+    }
+  ],
+  "ports": [
+    {
+      "addr": {
+        "adrfam": "ipv4",
+        "traddr": "0.0.0.0",
+        "treq": "not specified",
+        "trsvcid": "4420",
+        "trtype": "tcp",
+        "tsas": "none"
+      },
+      "ana_groups": [
+        {
+          "ana": {
+            "state": "optimized"
+          },
+          "grpid": 1
+        }
+      ],
+      "param": {
+        "inline_data_size": "16384",
+        "pi_enable": "0"
+      },
+      "portid": 0,
+      "referrals": [],
+      "subsystems": [
+        "{{ subsysnqn }}"
+      ]
+    }
+  ],
+  "subsystems": [
+    {
+      "allowed_hosts": [
+        "{{ allowed_hosts }}"
+      ],
+      "attr": {
+        "allow_any_host": "0",
+        "cntlid_max": "65519",
+        "cntlid_min": "1",
+        "firmware": "yada",
+        "ieee_oui": "0x000000",
+        "model": "Linux",
+        "pi_enable": "0",
+        "qid_max": "128",
+        "serial": "0c74361069d9db6c65ef",
+        "version": "1.3"
+      },
+      "namespaces": [
+        {
+          "ana": {
+            "grpid": "1"
+          },
+          "ana_grpid": 1,
+          "device": {
+            "nguid": "00000000-0000-0000-0000-000000000000",
+            "path": "{{ blkdev }}",
+            "uuid": "{{ subsys_uuid }}"
+          },
+          "enable": 1,
+          "nsid": 1
+        }
+      ],
+      "nqn": "{{ subsysnqn }}"
+    }
+  ]
+}