1 // SPDX-License-Identifier: CDDL-1.0
2 /*
3 * CDDL HEADER START
4 *
5 * The contents of this file are subject to the terms of the
6 * Common Development and Distribution License (the "License").
7 * You may not use this file except in compliance with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or https://opensource.org/licenses/CDDL-1.0.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22 /*
23 * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2012, 2018 by Delphix. All rights reserved.
25 */
26
27 #include <sys/bplist.h>
28 #include <sys/zfs_context.h>
29
30
31 void
bplist_create(bplist_t * bpl)32 bplist_create(bplist_t *bpl)
33 {
34 mutex_init(&bpl->bpl_lock, NULL, MUTEX_DEFAULT, NULL);
35 list_create(&bpl->bpl_list, sizeof (bplist_entry_t),
36 offsetof(bplist_entry_t, bpe_node));
37 }
38
39 void
bplist_destroy(bplist_t * bpl)40 bplist_destroy(bplist_t *bpl)
41 {
42 list_destroy(&bpl->bpl_list);
43 mutex_destroy(&bpl->bpl_lock);
44 }
45
46 void
bplist_append(bplist_t * bpl,const blkptr_t * bp)47 bplist_append(bplist_t *bpl, const blkptr_t *bp)
48 {
49 bplist_entry_t *bpe = kmem_alloc(sizeof (*bpe), KM_SLEEP);
50
51 mutex_enter(&bpl->bpl_lock);
52 bpe->bpe_blk = *bp;
53 list_insert_tail(&bpl->bpl_list, bpe);
54 mutex_exit(&bpl->bpl_lock);
55 }
56
57 /*
58 * To aid debugging, we keep the most recently removed entry. This way if
59 * we are in the callback, we can easily locate the entry.
60 */
61 static bplist_entry_t *bplist_iterate_last_removed;
62
63 void
bplist_iterate(bplist_t * bpl,bplist_itor_t * func,void * arg,dmu_tx_t * tx)64 bplist_iterate(bplist_t *bpl, bplist_itor_t *func, void *arg, dmu_tx_t *tx)
65 {
66 bplist_entry_t *bpe;
67
68 mutex_enter(&bpl->bpl_lock);
69 while ((bpe = list_remove_head(&bpl->bpl_list))) {
70 bplist_iterate_last_removed = 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
79 void
bplist_clear(bplist_t * bpl)80 bplist_clear(bplist_t *bpl)
81 {
82 bplist_entry_t *bpe;
83
84 mutex_enter(&bpl->bpl_lock);
85 while ((bpe = list_remove_head(&bpl->bpl_list)))
86 kmem_free(bpe, sizeof (*bpe));
87 mutex_exit(&bpl->bpl_lock);
88 }
89