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      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 /*
     22  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
     23  * Copyright (c) 2012, 2014 by Delphix. All rights reserved.
     24  */
     25 
     26 #ifndef	_SYS_DMU_TRAVERSE_H
     27 #define	_SYS_DMU_TRAVERSE_H
     28 
     29 #include <sys/zfs_context.h>
     30 #include <sys/spa.h>
     31 #include <sys/zio.h>
     32 
     33 #ifdef	__cplusplus
     34 extern "C" {
     35 #endif
     36 
     37 struct dnode_phys;
     38 struct dsl_dataset;
     39 struct zilog;
     40 struct arc_buf;
     41 
     42 typedef int (blkptr_cb_t)(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
     43     const zbookmark_phys_t *zb, const struct dnode_phys *dnp, void *arg);
     44 
     45 #define	TRAVERSE_PRE			(1<<0)
     46 #define	TRAVERSE_POST			(1<<1)
     47 #define	TRAVERSE_PREFETCH_METADATA	(1<<2)
     48 #define	TRAVERSE_PREFETCH_DATA		(1<<3)
     49 #define	TRAVERSE_PREFETCH (TRAVERSE_PREFETCH_METADATA | TRAVERSE_PREFETCH_DATA)
     50 #define	TRAVERSE_HARD			(1<<4)
     51 
     52 /* Special traverse error return value to indicate skipping of children */
     53 #define	TRAVERSE_VISIT_NO_CHILDREN	-1
     54 
     55 int traverse_dataset(struct dsl_dataset *ds,
     56     uint64_t txg_start, int flags, blkptr_cb_t func, void *arg);
     57 int traverse_dataset_resume(struct dsl_dataset *ds, uint64_t txg_start,
     58     zbookmark_phys_t *resume, int flags, blkptr_cb_t func, void *arg);
     59 int traverse_dataset_destroyed(spa_t *spa, blkptr_t *blkptr,
     60     uint64_t txg_start, zbookmark_phys_t *resume, int flags,
     61     blkptr_cb_t func, void *arg);
     62 int traverse_pool(spa_t *spa,
     63     uint64_t txg_start, int flags, blkptr_cb_t func, void *arg);
     64 
     65 #ifdef	__cplusplus
     66 }
     67 #endif
     68 
     69 #endif /* _SYS_DMU_TRAVERSE_H */
     70