usr/src/lib/sun_sas/common/Sun_sasGetNumberOfAdapters.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  * Returns the number of HBAs supported by the library.  This returns the
  31  * current number of HBAs, even if this changes
  32  *
  33  */
  34 HBA_UINT32 Sun_sasGetNumberOfAdapters() {
  35             int count;
  36             struct sun_sas_hba  *hba_ptr;
  37
  38         lock(&all_hbas_lock);
  39         /* goes through hba list counting all the hbas found */
  40         for (count = 0, hba_ptr = global_hba_head;
  41             hba_ptr != NULL; hba_ptr = hba_ptr->next, count++) {}
  42
  43         unlock(&all_hbas_lock);
  44
  45         return (count);
  46 }