diff options
Diffstat (limited to 'sys/contrib/openzfs/module/zfs/bplist.c')
-rw-r--r-- | sys/contrib/openzfs/module/zfs/bplist.c | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/sys/contrib/openzfs/module/zfs/bplist.c b/sys/contrib/openzfs/module/zfs/bplist.c new file mode 100644 index 000000000000..47ea364ef26f --- /dev/null +++ b/sys/contrib/openzfs/module/zfs/bplist.c @@ -0,0 +1,91 @@ +/* + * 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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2012, 2018 by Delphix. All rights reserved. + */ + +#include <sys/bplist.h> +#include <sys/zfs_context.h> + + +void +bplist_create(bplist_t *bpl) +{ + mutex_init(&bpl->bpl_lock, NULL, MUTEX_DEFAULT, NULL); + list_create(&bpl->bpl_list, sizeof (bplist_entry_t), + offsetof(bplist_entry_t, bpe_node)); +} + +void +bplist_destroy(bplist_t *bpl) +{ + list_destroy(&bpl->bpl_list); + mutex_destroy(&bpl->bpl_lock); +} + +void +bplist_append(bplist_t *bpl, const blkptr_t *bp) +{ + bplist_entry_t *bpe = kmem_alloc(sizeof (*bpe), KM_SLEEP); + + mutex_enter(&bpl->bpl_lock); + bpe->bpe_blk = *bp; + list_insert_tail(&bpl->bpl_list, bpe); + mutex_exit(&bpl->bpl_lock); +} + +/* + * To aid debugging, we keep the most recently removed entry. This way if + * we are in the callback, we can easily locate the entry. + */ +static bplist_entry_t *bplist_iterate_last_removed; + +void +bplist_iterate(bplist_t *bpl, bplist_itor_t *func, void *arg, dmu_tx_t *tx) +{ + bplist_entry_t *bpe; + + mutex_enter(&bpl->bpl_lock); + while ((bpe = list_head(&bpl->bpl_list))) { + bplist_iterate_last_removed = bpe; + list_remove(&bpl->bpl_list, bpe); + mutex_exit(&bpl->bpl_lock); + func(arg, &bpe->bpe_blk, tx); + kmem_free(bpe, sizeof (*bpe)); + mutex_enter(&bpl->bpl_lock); + } + mutex_exit(&bpl->bpl_lock); +} + +void +bplist_clear(bplist_t *bpl) +{ + bplist_entry_t *bpe; + + mutex_enter(&bpl->bpl_lock); + while ((bpe = list_head(&bpl->bpl_list))) { + bplist_iterate_last_removed = bpe; + list_remove(&bpl->bpl_list, bpe); + kmem_free(bpe, sizeof (*bpe)); + } + mutex_exit(&bpl->bpl_lock); +} |