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.
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.
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]
22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
23 * Use is subject to license terms.
27 * Copyright (c) 2014 by Delphix. All rights reserved.
33 #include <sys/zfs_context.h>
39 extern uint64_t zfetch_array_rd_sz;
41 struct dnode; /* so we can reference dnode */
43 typedef struct zstream {
44 uint64_t zs_blkid; /* expect next access at this blkid */
45 uint64_t zs_pf_blkid; /* next block to prefetch */
46 kmutex_t zs_lock; /* protects stream */
47 hrtime_t zs_atime; /* time last prefetch issued */
48 list_node_t zs_node; /* link for zf_stream */
51 typedef struct zfetch {
52 krwlock_t zf_rwlock; /* protects zfetch structure */
53 list_t zf_stream; /* list of zstream_t's */
54 struct dnode *zf_dnode; /* dnode that owns this zfetch */
57 void zfetch_init(void);
58 void zfetch_fini(void);
60 void dmu_zfetch_init(zfetch_t *, struct dnode *);
61 void dmu_zfetch_fini(zfetch_t *);
62 void dmu_zfetch(zfetch_t *, uint64_t, uint64_t);
69 #endif /* _DMU_ZFETCH_H */