Initial commit

Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>

utils/open-cas-loader

@@ -0,0 +1,56 @@
+#!/usr/bin/env python2
+#
+# Copyright(c) 2012-2019 Intel Corporation
+# SPDX-License-Identifier: BSD-3-Clause-Clear
+#
+
+from __future__ import print_function
+import subprocess
+import time
+import opencas
+import sys
+import os
+import syslog as sl
+
+def wait_for_cas_ctrl():
+    for i in range(30): # timeout 30s
+        if os.path.exists('/dev/cas_ctrl'):
+            return
+        time.sleep(1)
+
+try:
+    subprocess.call(['/sbin/modprobe', 'cas_cache'])
+except:
+    sl.syslog(sl.LOG_ERR, 'Unable to probe cas_cache module')
+    exit(1)
+
+try:
+    config = opencas.cas_config.from_file('/etc/opencas/opencas.conf',
+                                       allow_incomplete=True)
+except Exception as e:
+    sl.syslog(sl.LOG_ERR,
+            'Unable to load opencas config. Reason: {0}'.format(str(e)))
+    exit(1)
+
+for cache in config.caches.values():
+    if sys.argv[1] == os.path.realpath(cache.device):
+        try:
+            wait_for_cas_ctrl()
+            opencas.start_cache(cache, True)
+        except opencas.casadm.CasadmError as e:
+            sl.syslog(sl.LOG_WARNING,
+                    'Unable to load cache {0} ({1}). Reason: {2}'
+                    .format(cache.cache_id, cache.device, e.result.stderr))
+            exit(e.result.exit_code)
+        exit(0)
+    for core in cache.cores.values():
+        if sys.argv[1] == os.path.realpath(core.device):
+            try:
+                wait_for_cas_ctrl()
+                opencas.add_core(core, True)
+            except opencas.casadm.CasadmError as e:
+                sl.syslog(sl.LOG_WARNING,
+                        'Unable to attach core {0} from cache {1}. Reason: {2}'
+                        .format(core.device, cache.cache_id, e.result.stderr))
+                exit(e.result.exit_code)
+            exit(0)