usr/src/lib/mpapi/libmpapi/common/mpapi-sun.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 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 /*
  27  * Description
  28  * mpapi-sun.c - Implements the Sun Extension to the Multipath Management
  29  * API Version 1.0
  30  */
  31
  32 #include <dlfcn.h>
  33 #include <pthread.h>
  34 #include "mpapi.h"
  35 #include "mpapi-sun.h"
  36 #include "mpapi-plugin.h"
  37
  38 extern MPPLUGININFO_T plugintable[MP_MAX_NUM_PLUGINS];
  39
  40 extern pthread_mutex_t mp_lib_mutex;
  41 extern MP_STATUS validate_object(MP_OID obj, MP_OBJECT_TYPE objType,
  42                 MP_UINT32 flag);
  43
  44 MP_STATUS Sun_MP_SendScsiCmd(
  45         MP_OID pathOid, struct uscsi_cmd *cmd)
  46 {
  47         Sun_MP_SendScsiCmdFn PassFunc;
  48         MP_UINT32 index;
  49         MP_STATUS status;
  50
  51         if ((status = validate_object(pathOid, MP_OBJECT_TYPE_PATH_LU,
  52             MP_OBJECT_TYPE_MATCH)) != MP_STATUS_SUCCESS) {
  53             return (status);
  54         }
  55
  56         (void) pthread_mutex_lock(&mp_lib_mutex);
  57
  58         index = pathOid.ownerId - 1;
  59         if (plugintable[index].hdlPlugin != NULL) {
  60             PassFunc = (Sun_MP_SendScsiCmdFn)
  61             dlsym(plugintable[index].hdlPlugin,
  62             "Sun_MP_SendScsiCmd");
  63
  64             if (PassFunc != NULL) {
  65                 status = PassFunc(pathOid, cmd);
  66             } else {
  67                 status = MP_STATUS_UNSUPPORTED;
  68             }
  69         } else {
  70             status = MP_STATUS_FAILED;
  71         }
  72
  73         (void) pthread_mutex_unlock(&mp_lib_mutex);
  74         return (status);
  75 }