106 lines
3.0 KiB
C
106 lines
3.0 KiB
C
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/*-
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* BSD LICENSE
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*
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* Copyright (C) 2008-2012 Daisuke Aoyama <aoyama@peach.ne.jp>.
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* Copyright (c) Intel Corporation.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "spdk/bdev_db.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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#include "spdk/bdev.h"
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#include "spdk/log.h"
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struct spdk_db_entry {
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struct spdk_bdev *bdev;
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int claimed;
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struct spdk_db_entry *next;
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};
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static struct spdk_db_entry *bdev_list_head = NULL;
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int spdk_bdev_db_add(struct spdk_bdev *bdev)
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{
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struct spdk_db_entry *new_entry = calloc(1, sizeof(struct spdk_db_entry));
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if (!new_entry) {
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SPDK_ERRLOG("Failed to allocate DB entry\n");
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return -ENOMEM;
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}
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new_entry->bdev = bdev;
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new_entry->next = bdev_list_head;
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bdev_list_head = new_entry;
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return 0;
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}
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int spdk_bdev_db_delete(struct spdk_bdev *bdev)
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{
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struct spdk_db_entry *prev = NULL;
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struct spdk_db_entry *node = bdev_list_head;
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while (node != NULL) {
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if (node->bdev == bdev) {
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if (prev != NULL) {
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prev->next = node->next;
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} else {
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bdev_list_head = node->next;
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}
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free(node);
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break;
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}
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prev = node;
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node = node->next;
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}
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return 0;
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}
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struct spdk_bdev *spdk_bdev_db_get_by_name(const char *bdev_name)
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{
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struct spdk_db_entry *current = bdev_list_head;
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while (current != NULL) {
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struct spdk_bdev *bdev = current->bdev;
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if (strncmp(bdev_name, bdev->name, sizeof(bdev->name)) == 0) {
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current->claimed++;
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return bdev;
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}
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current = current->next;
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}
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return NULL;
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}
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