usr/src/lib/sun_sas/common/Sun_sasCloseAdapter.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 /*
  23  * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #include    <sun_sas.h>
  28
  29 /*
  30  * Closes an adapter
  31  *
  32  * the handle is removed from the open_handles list
  33  */
  34 void
  35 Sun_sasCloseAdapter(HBA_HANDLE handle)
  36 {
  37         const char                      ROUTINE[] = "Sun_sasCloseAdapter";
  38         struct open_handle              *open_handle_ptr, *open_handle_prev_ptr;
  39         int                             found = 0;
  40
  41         if (global_hba_head == NULL) {
  42                 log(LOG_DEBUG, ROUTINE,
  43                     "Attempted to close an invalid handle %08lx. "
  44                     "There are no hba handles loaded in the VSL.",
  45                     handle);
  46                 return;
  47         }
  48
  49         /* Removing handle from open_handles; */
  50         lock(&open_handles_lock);
  51         if (global_hba_head->open_handles == NULL) {
  52                 /* check to see if there are any open global_hba_head */
  53                 log(LOG_DEBUG, ROUTINE,
  54                     "Attempted to close an invalid handle %08lx. "
  55                     "There are no open handles in the VSL.",
  56                     handle);
  57         } else if (global_hba_head->open_handles->next == NULL) {
  58                 /* there is only one handle open */
  59                 if (global_hba_head->open_handles->handle == handle) {
  60                         free(global_hba_head->open_handles);
  61                         global_hba_head->open_handles = NULL;
  62                 } else {
  63                         log(LOG_DEBUG, ROUTINE,
  64                             "Attempted to close an invalid handle %08lx. "
  65                             "Unable to find handle to close.", handle);
  66                 }
  67         } else {        /* there is more than one handle open */
  68                 open_handle_ptr = global_hba_head->open_handles;
  69                 if (open_handle_ptr->handle == handle) {
  70                         global_hba_head->open_handles = open_handle_ptr->next;
  71                         free(open_handle_ptr);
  72                 } else {
  73                         for (open_handle_ptr = open_handle_ptr->next,
  74                             open_handle_prev_ptr =
  75                             global_hba_head->open_handles;
  76                             open_handle_ptr != NULL;
  77                             open_handle_ptr = open_handle_ptr->next) {
  78                                 if (open_handle_ptr->handle == handle) {
  79                                         open_handle_prev_ptr->next =
  80                                             open_handle_ptr->next;
  81                                         free(open_handle_ptr);
  82                                         found = 1;
  83                                         break;
  84                                 } else {
  85                                         open_handle_prev_ptr =
  86                                             open_handle_prev_ptr->next;
  87                                 }
  88                         }
  89                         if (found == 0) {
  90                                 log(LOG_DEBUG, ROUTINE,
  91                                     "Attempted to close an invalid handle "
  92                                     "%08lx.  Unable to find handle to close.",
  93                                     handle);
  94                         }
  95                 }
  96         }
  97
  98         unlock(&open_handles_lock);
  99 }