diff options
Diffstat (limited to 'sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu_zfetch.h')
-rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu_zfetch.h | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu_zfetch.h b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu_zfetch.h new file mode 100644 index 000000000000..21a3ff3a2032 --- /dev/null +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/dmu_zfetch.h @@ -0,0 +1,76 @@ +/* + * 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 2009 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +/* + * Copyright (c) 2014 by Delphix. All rights reserved. + */ + +#ifndef _DMU_ZFETCH_H +#define _DMU_ZFETCH_H + +#include <sys/zfs_context.h> + +#ifdef __cplusplus +extern "C" { +#endif + +extern uint64_t zfetch_array_rd_sz; + +struct dnode; /* so we can reference dnode */ + +typedef struct zstream { + uint64_t zs_blkid; /* expect next access at this blkid */ + uint64_t zs_pf_blkid; /* next block to prefetch */ + + /* + * We will next prefetch the L1 indirect block of this level-0 + * block id. + */ + uint64_t zs_ipf_blkid; + + kmutex_t zs_lock; /* protects stream */ + hrtime_t zs_atime; /* time last prefetch issued */ + list_node_t zs_node; /* link for zf_stream */ +} zstream_t; + +typedef struct zfetch { + krwlock_t zf_rwlock; /* protects zfetch structure */ + list_t zf_stream; /* list of zstream_t's */ + struct dnode *zf_dnode; /* dnode that owns this zfetch */ +} zfetch_t; + +void zfetch_init(void); +void zfetch_fini(void); + +void dmu_zfetch_init(zfetch_t *, struct dnode *); +void dmu_zfetch_fini(zfetch_t *); +void dmu_zfetch(zfetch_t *, uint64_t, uint64_t, boolean_t); + + +#ifdef __cplusplus +} +#endif + +#endif /* _DMU_ZFETCH_H */ |