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, 2018 by Delphix. All rights reserved. 24 */ 25 26 #include <sys/bplist.h> 27 #include <sys/zfs_context.h> 28 29 30 void 31 bplist_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 38 void 39 bplist_destroy(bplist_t *bpl) 40 { 41 list_destroy(&bpl->bpl_list); 42 mutex_destroy(&bpl->bpl_lock); 43 } 44 45 void 46 bplist_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 */ 60 static bplist_entry_t *bplist_iterate_last_removed; 61 62 void 63 bplist_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 79 void 80 bplist_clear(bplist_t *bpl) 81 { 82 bplist_entry_t *bpe; 83 84 mutex_enter(&bpl->bpl_lock); 85 while ((bpe = list_head(&bpl->bpl_list))) { 86 bplist_iterate_last_removed = bpe; 87 list_remove(&bpl->bpl_list, bpe); 88 kmem_free(bpe, sizeof (*bpe)); 89 } 90 mutex_exit(&bpl->bpl_lock); 91 } 92