Validate -K supported tunables

plugins/modules/tunables.py

@@ -635,7 +635,14 @@ def modify(module):
 
     live_update = getOSlevel(module)
     if live_update and component in ['vmo', 'no']:
-        cmd += '-K '
+        valid_live_update_tunables = validate_live_update(module, tunable_params_with_value)
+        if valid_live_update_tunables:
+            if change_type != "reboot":
+                results['msg'] = "In AIX 7.3, if you want to change tunables which support"
+                results['msg'] += "live update flag, -K, then provide change_type as reboot."
+                module.fail_json(**results)
+            else:
+                cmd += '-K '
 
     # include the tunables to be modified and their new values in command
     for tunable, value in tunable_params_with_value.items():
@@ -663,6 +670,42 @@ def modify(module):
             results['reboot_required'] = True
 
 
+def validate_live_update(module, tunable_params_with_value):
+    '''
+    Checks that all tunables support -K option in AIX 7.3
+
+    arguments:
+        module: The ansible module
+        tunable_params_with_value  (dict): Tunable parameters and values
+    note:
+        Exits with fail_json in case of both supported and non supported tunables are present
+    return:
+        True if all tunables are -K supported
+    '''
+
+    contain_supported_tunables = False
+    contain_non_supported_tunables = False
+
+    supported_tunables = ["ame_cpus_per_pool", "kernel_heap_size", "msem_nlocks",
+                          "num_locks_per_semid", "vmm_klock_mode", "timer_wheel_tick",
+                          "extendednetstats", "lo_perf", "ipqmaxlen", "arptab_bsiz",
+                          "arptab_nb", "tcp_inpcb_hashtab_siz", "udp_inpcb_hashtab_siz",
+                          "use_sndbufpool", "udp_recv_perf", "udp_send_perf", "rtentry_lock_complex"]
+
+    for params in tunable_params_with_value.keys():
+        if params in supported_tunables:
+            contain_supported_tunables = True
+        else:
+            contain_non_supported_tunables = True
+        if contain_supported_tunables and contain_non_supported_tunables:
+            results['msg'] = "Live update flag -K supported and non supported tunables are used together."
+            results['msg'] += "Please use those tunables separately."
+            module.fail_json(**results)
+
+    if contain_supported_tunables and not contain_non_supported_tunables:
+        return True
+
+
 def main():
     '''
     Main function