Add KCAS_ERR_CORE_IN_ACTIVE_STATE error code.

New error code will allow to properly handle issues caused by wrong
usage of `remove inactive core` command.
It will also allow to print meaningful error messages.

Signed-off-by: Slawomir Jankowski <slawomir.jankowski@intel.com>

casadm/extended_err_msg.c

@@ -256,7 +256,11 @@ struct {
 		KCAS_ERR_CACHE_STOPPING,
 		"Cache being stopped"
 	},
+	{
 
+		KCAS_ERR_CORE_IN_ACTIVE_STATE,
+		"Core device is in active state"
+	},
 
 };
 

modules/cas_cache/utils/cas_err.h

@@ -65,6 +65,7 @@ struct {
 	{ KCAS_ERR_A_PART,			EINVAL	},
 	{ KCAS_ERR_REMOVED_DIRTY,		EIO	},
 	{ KCAS_ERR_STOPPED_DIRTY,		EIO	},
+	{ KCAS_ERR_CORE_IN_ACTIVE_STATE,	ENODEV	},
 };
 
 /*******************************************/

modules/include/cas_ioctl_codes.h

@@ -589,6 +589,9 @@ enum kcas_error {
 
 	/** Cache already being stopped*/
 	KCAS_ERR_CACHE_STOPPING,
+
+	/** Core device is in active state */
+	KCAS_ERR_CORE_IN_ACTIVE_STATE
 };
 
 #endif