1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 513506d1eSmaybee * Common Development and Distribution License (the "License"). 613506d1eSmaybee * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 227cbf8b43SRich Morris * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23fa9e4066Sahrens * Use is subject to license terms. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 26cf6106c8SMatthew Ahrens /* 279704bf7fSPaul Dagnelie * Copyright (c) 2014, 2017 by Delphix. All rights reserved. 28cf6106c8SMatthew Ahrens */ 29cf6106c8SMatthew Ahrens 30cf6106c8SMatthew Ahrens #ifndef _DMU_ZFETCH_H 31cf6106c8SMatthew Ahrens #define _DMU_ZFETCH_H 32fa9e4066Sahrens 33fa9e4066Sahrens #include <sys/zfs_context.h> 34fa9e4066Sahrens 35fa9e4066Sahrens #ifdef __cplusplus 36fa9e4066Sahrens extern "C" { 37fa9e4066Sahrens #endif 38fa9e4066Sahrens 39fa9e4066Sahrens extern uint64_t zfetch_array_rd_sz; 40fa9e4066Sahrens 41fa9e4066Sahrens struct dnode; /* so we can reference dnode */ 42fa9e4066Sahrens 43*9e3493cbSJason King typedef struct zfetch { 44*9e3493cbSJason King krwlock_t zf_rwlock; /* protects zfetch structure */ 45*9e3493cbSJason King list_t zf_stream; /* list of zstream_t's */ 46*9e3493cbSJason King struct dnode *zf_dnode; /* dnode that owns this zfetch */ 47*9e3493cbSJason King int zf_numstreams; /* number of zstream_t's */ 48*9e3493cbSJason King } zfetch_t; 49*9e3493cbSJason King 50fa9e4066Sahrens typedef struct zstream { 51cf6106c8SMatthew Ahrens uint64_t zs_blkid; /* expect next access at this blkid */ 52cf6106c8SMatthew Ahrens uint64_t zs_pf_blkid; /* next block to prefetch */ 53cb92f413SAlexander Motin 54cb92f413SAlexander Motin /* 55cb92f413SAlexander Motin * We will next prefetch the L1 indirect block of this level-0 56cb92f413SAlexander Motin * block id. 57cb92f413SAlexander Motin */ 58cb92f413SAlexander Motin uint64_t zs_ipf_blkid; 59cb92f413SAlexander Motin 60cf6106c8SMatthew Ahrens kmutex_t zs_lock; /* protects stream */ 61cf6106c8SMatthew Ahrens hrtime_t zs_atime; /* time last prefetch issued */ 62*9e3493cbSJason King hrtime_t zs_start_time; /* start of last prefetch */ 63cf6106c8SMatthew Ahrens list_node_t zs_node; /* link for zf_stream */ 64*9e3493cbSJason King zfetch_t *zs_fetch; /* parent fetch */ 65*9e3493cbSJason King zfs_refcount_t zs_blocks; /* number of pending blocks in the stream */ 66fa9e4066Sahrens } zstream_t; 67fa9e4066Sahrens 687cbf8b43SRich Morris void zfetch_init(void); 697cbf8b43SRich Morris void zfetch_fini(void); 707cbf8b43SRich Morris 71fa9e4066Sahrens void dmu_zfetch_init(zfetch_t *, struct dnode *); 72cf6106c8SMatthew Ahrens void dmu_zfetch_fini(zfetch_t *); 739704bf7fSPaul Dagnelie void dmu_zfetch(zfetch_t *, uint64_t, uint64_t, boolean_t, 749704bf7fSPaul Dagnelie boolean_t); 75fa9e4066Sahrens 76fa9e4066Sahrens 77fa9e4066Sahrens #ifdef __cplusplus 78fa9e4066Sahrens } 79fa9e4066Sahrens #endif 80fa9e4066Sahrens 81cf6106c8SMatthew Ahrens #endif /* _DMU_ZFETCH_H */ 82