projects / mirror_zfs.git / blame
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|---|---|---|
| 34dc7c2f BB |
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 | /* | |
| 428870ff | 22 | * Copyright 2009 Sun Microsystems, Inc. All rights reserved. |
| 34dc7c2f BB |
23 | * Use is subject to license terms. |
| 24 | */ | |
| 25 | ||
| 7f60329a MA |
26 | /* |
| 27 | * Copyright (c) 2014 by Delphix. All rights reserved. | |
| 28 | */ | |
| 29 | ||
| 30 | #ifndef _DMU_ZFETCH_H | |
| 31 | #define _DMU_ZFETCH_H | |
| 34dc7c2f | 32 | |
| 34dc7c2f BB |
33 | #include <sys/zfs_context.h> |
| 34 | ||
| 35 | #ifdef __cplusplus | |
| 36 | extern "C" { | |
| 37 | #endif | |
| 38 | ||
| c409e464 | 39 | extern unsigned long zfetch_array_rd_sz; |
| 34dc7c2f BB |
40 | |
| 41 | struct dnode; /* so we can reference dnode */ | |
| 42 | ||
| 34dc7c2f | 43 | typedef struct zstream { |
| 7f60329a MA |
44 | uint64_t zs_blkid; /* expect next access at this blkid */ |
| 45 | uint64_t zs_pf_blkid; /* next block to prefetch */ | |
| 755065f3 AM |
46 | |
| 47 | /* | |
| 48 | * We will next prefetch the L1 indirect block of this level-0 | |
| 49 | * block id. | |
| 50 | */ | |
| 51 | uint64_t zs_ipf_blkid; | |
| 52 | ||
| 7f60329a MA |
53 | kmutex_t zs_lock; /* protects stream */ |
| 54 | hrtime_t zs_atime; /* time last prefetch issued */ | |
| 55 | list_node_t zs_node; /* link for zf_stream */ | |
| 34dc7c2f BB |
56 | } zstream_t; |
| 57 | ||
| 58 | typedef struct zfetch { | |
| 59 | krwlock_t zf_rwlock; /* protects zfetch structure */ | |
| 7f60329a | 60 | list_t zf_stream; /* list of zstream_t's */ |
| 34dc7c2f | 61 | struct dnode *zf_dnode; /* dnode that owns this zfetch */ |
| 34dc7c2f BB |
62 | } zfetch_t; |
| 63 | ||
| 428870ff BB |
64 | void zfetch_init(void); |
| 65 | void zfetch_fini(void); | |
| 66 | ||
| 34dc7c2f | 67 | void dmu_zfetch_init(zfetch_t *, struct dnode *); |
| 7f60329a | 68 | void dmu_zfetch_fini(zfetch_t *); |
| 755065f3 | 69 | void dmu_zfetch(zfetch_t *, uint64_t, uint64_t, boolean_t); |
| 34dc7c2f BB |
70 | |
| 71 | ||
| 72 | #ifdef __cplusplus | |
| 73 | } | |
| 74 | #endif | |
| 75 | ||
| 7f60329a | 76 | #endif /* _DMU_ZFETCH_H */ |