/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2009 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#include    <sun_sas.h>

/*
 * Closes an adapter
 *
 * the handle is removed from the open_handles list
 */
void
Sun_sasCloseAdapter(HBA_HANDLE handle)
{
        const char                      ROUTINE[] = "Sun_sasCloseAdapter";
        struct open_handle              *open_handle_ptr, *open_handle_prev_ptr;
        int                             found = 0;

        if (global_hba_head == NULL) {
                log(LOG_DEBUG, ROUTINE,
                    "Attempted to close an invalid handle %08lx. "
                    "There are no hba handles loaded in the VSL.",
                    handle);
                return;
        }

        /* Removing handle from open_handles; */
        lock(&open_handles_lock);
        if (global_hba_head->open_handles == NULL) {
                /* check to see if there are any open global_hba_head */
                log(LOG_DEBUG, ROUTINE,
                    "Attempted to close an invalid handle %08lx. "
                    "There are no open handles in the VSL.",
                    handle);
        } else if (global_hba_head->open_handles->next == NULL) {
                /* there is only one handle open */
                if (global_hba_head->open_handles->handle == handle) {
                        free(global_hba_head->open_handles);
                        global_hba_head->open_handles = NULL;
                } else {
                        log(LOG_DEBUG, ROUTINE,
                            "Attempted to close an invalid handle %08lx. "
                            "Unable to find handle to close.", handle);
                }
        } else {        /* there is more than one handle open */
                open_handle_ptr = global_hba_head->open_handles;
                if (open_handle_ptr->handle == handle) {
                        global_hba_head->open_handles = open_handle_ptr->next;
                        free(open_handle_ptr);
                } else {
                        for (open_handle_ptr = open_handle_ptr->next,
                            open_handle_prev_ptr =
                            global_hba_head->open_handles;
                            open_handle_ptr != NULL;
                            open_handle_ptr = open_handle_ptr->next) {
                                if (open_handle_ptr->handle == handle) {
                                        open_handle_prev_ptr->next =
                                            open_handle_ptr->next;
                                        free(open_handle_ptr);
                                        found = 1;
                                        break;
                                } else {
                                        open_handle_prev_ptr =
                                            open_handle_prev_ptr->next;
                                }
                        }
                        if (found == 0) {
                                log(LOG_DEBUG, ROUTINE,
                                    "Attempted to close an invalid handle "
                                    "%08lx.  Unable to find handle to close.",
                                    handle);
                        }
                }
        }

        unlock(&open_handles_lock);
}