usr/src/lib/mpapi/libmpscsi_vhci/common/MP_RegForObjVisChangesPlugin.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright (c) 2006, 2010, Oracle and/or its affiliates. All rights reserved.
  23  */
  24
  25 #include "mp_utils.h"
  26
  27
  28 /*
  29  *      Called by the common layer to request the plugin to call
  30  *      a client application's callback (pClientFn) when a visibility change
  31  *      is detected for the given object type.
  32  */
  33
  34 MP_STATUS
  35 MP_RegisterForObjectVisibilityChangesPlugin(MP_OBJECT_VISIBILITY_FN pClientFn,
  36                 MP_OBJECT_TYPE objectType,
  37                 void *pCallerData)
  38 {
  39         MP_BOOL hasFunc = MP_FALSE;
  40
  41
  42         log(LOG_INFO, "MP_RegisterForObjectVisibilityChangesPlugin()",
  43             " - enter");
  44
  45
  46         /* Validate the object type passes in within range */
  47         if (objectType > MP_OBJECT_TYPE_MAX) {
  48
  49                 log(LOG_INFO, "MP_RegisterForObjectVisibilityChangesPlugin()",
  50                     " - objectType is invalid");
  51
  52                 log(LOG_INFO, "MP_RegisterForObjectVisibilityChangesPlugin()",
  53                     " - error exit");
  54
  55                 return (MP_STATUS_INVALID_PARAMETER);
  56         }
  57
  58         if (objectType < 1) {
  59
  60                 log(LOG_INFO, "MP_RegisterForObjectVisibilityChangesPlugin()",
  61                     " - objectType is invalid");
  62
  63                 log(LOG_INFO, "MP_RegisterForObjectVisibilityChangesPlugin()",
  64                     " - error exit");
  65
  66                 return (MP_STATUS_INVALID_PARAMETER);
  67         }
  68
  69         /* Init sysevents if they have not been initialized yet */
  70         if (g_SysEventHandle == NULL) {
  71                 if (init_sysevents() != MP_STATUS_SUCCESS)
  72                         return (MP_STATUS_FAILED);
  73         }
  74
  75         /* Check to see if we are going to be replacing */
  76         (void) pthread_mutex_lock(&g_visa_mutex);
  77         if (g_Visibility_Callback_List[objectType].pClientFn != NULL) {
  78
  79                 hasFunc = MP_TRUE;
  80         }
  81
  82         /* Add the registration */
  83         g_Visibility_Callback_List[objectType].pClientFn   = pClientFn;
  84         g_Visibility_Callback_List[objectType].pCallerData = pCallerData;
  85         (void) pthread_mutex_unlock(&g_visa_mutex);
  86
  87         if (hasFunc) {
  88
  89                 log(LOG_INFO, "MP_RegisterForObjectVisibilityChangesPlugin()",
  90                     " - returning MP_STATUS_FN_REPLACED");
  91
  92                 return (MP_STATUS_FN_REPLACED);
  93         }
  94
  95
  96         log(LOG_INFO, "MP_RegisterForObjectVisibilityChangesPlugin()",
  97             " - exit");
  98
  99         return (MP_STATUS_SUCCESS);
 100 }