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  */
  24 
  25 #ifndef _SYS_DMU_TRAVERSE_H
  26 #define _SYS_DMU_TRAVERSE_H
  27 
  28 #include <sys/zfs_context.h>
  29 #include <sys/spa.h>
  30 #include <sys/zio.h>
  31 
  32 #ifdef  __cplusplus
  33 extern "C" {
  34 #endif
  35 
  36 struct dnode_phys;
  37 struct dsl_dataset;
  38 struct zilog;
  39 struct arc_buf;
  40 
  41 typedef int (blkptr_cb_t)(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
  42     struct arc_buf *pbuf, const zbookmark_t *zb, const struct dnode_phys *dnp,
  43     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_pool(spa_t *spa,
  58     uint64_t txg_start, int flags, blkptr_cb_t func, void *arg);
  59 
  60 #ifdef  __cplusplus
  61 }
  62 #endif
  63 
  64 #endif /* _SYS_DMU_TRAVERSE_H */