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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
23 * Copyright (c) 2012 by Delphix. All rights reserved.
24 */
25
26#include <sys/bplist.h>
27#include <sys/zfs_context.h>
28
29
30void
31bplist_create(bplist_t *bpl)
32{
33	mutex_init(&bpl->bpl_lock, NULL, MUTEX_DEFAULT, NULL);
34	list_create(&bpl->bpl_list, sizeof (bplist_entry_t),
35	    offsetof(bplist_entry_t, bpe_node));
36}
37
38void
39bplist_destroy(bplist_t *bpl)
40{
41	list_destroy(&bpl->bpl_list);
42	mutex_destroy(&bpl->bpl_lock);
43}
44
45void
46bplist_append(bplist_t *bpl, const blkptr_t *bp)
47{
48	bplist_entry_t *bpe = kmem_alloc(sizeof (*bpe), KM_SLEEP);
49
50	mutex_enter(&bpl->bpl_lock);
51	bpe->bpe_blk = *bp;
52	list_insert_tail(&bpl->bpl_list, bpe);
53	mutex_exit(&bpl->bpl_lock);
54}
55
56/*
57 * To aid debugging, we keep the most recently removed entry.  This way if
58 * we are in the callback, we can easily locate the entry.
59 */
60static bplist_entry_t *bplist_iterate_last_removed;
61
62void
63bplist_iterate(bplist_t *bpl, bplist_itor_t *func, void *arg, dmu_tx_t *tx)
64{
65	bplist_entry_t *bpe;
66
67	mutex_enter(&bpl->bpl_lock);
68	while (bpe = list_head(&bpl->bpl_list)) {
69		bplist_iterate_last_removed = bpe;
70		list_remove(&bpl->bpl_list, bpe);
71		mutex_exit(&bpl->bpl_lock);
72		func(arg, &bpe->bpe_blk, tx);
73		kmem_free(bpe, sizeof (*bpe));
74		mutex_enter(&bpl->bpl_lock);
75	}
76	mutex_exit(&bpl->bpl_lock);
77}
78