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/*
* 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 (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012, 2018 by Delphix. All rights reserved.
*/
#ifndef _SYS_DMU_TRAVERSE_H
#define _SYS_DMU_TRAVERSE_H
#include <sys/zfs_context.h>
#include <sys/spa.h>
#include <sys/zio.h>
#ifdef __cplusplus
extern "C" {
#endif
struct dnode_phys;
struct dsl_dataset;
struct zilog;
struct arc_buf;
typedef int (blkptr_cb_t)(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
const zbookmark_phys_t *zb, const struct dnode_phys *dnp, void *arg);
#define TRAVERSE_PRE (1<<0)
#define TRAVERSE_POST (1<<1)
#define TRAVERSE_PREFETCH_METADATA (1<<2)
#define TRAVERSE_PREFETCH_DATA (1<<3)
#define TRAVERSE_PREFETCH (TRAVERSE_PREFETCH_METADATA | TRAVERSE_PREFETCH_DATA)
#define TRAVERSE_HARD (1<<4)
/*
* Encrypted dnode blocks have encrypted bonus buffers while the rest
* of the dnode is left unencrypted. Callers can specify the
* TRAVERSE_NO_DECRYPT flag to indicate to the traversal code that
* they wish to receive the raw encrypted dnodes instead of attempting
* to read the logical data.
*/
#define TRAVERSE_NO_DECRYPT (1<<5)
/* Special traverse error return value to indicate skipping of children */
#define TRAVERSE_VISIT_NO_CHILDREN -1
int traverse_dataset(struct dsl_dataset *ds,
uint64_t txg_start, int flags, blkptr_cb_t func, void *arg);
int traverse_dataset_resume(struct dsl_dataset *ds, uint64_t txg_start,
zbookmark_phys_t *resume, int flags, blkptr_cb_t func, void *arg);
int traverse_dataset_destroyed(spa_t *spa, blkptr_t *blkptr,
uint64_t txg_start, zbookmark_phys_t *resume, int flags,
blkptr_cb_t func, void *arg);
int traverse_pool(spa_t *spa,
uint64_t txg_start, int flags, blkptr_cb_t func, void *arg);
/*
* Note that this calculation cannot overflow with the current maximum indirect
* block size (128k). If that maximum is increased to 1M, however, this
* calculation can overflow, and handling would need to be added to ensure
* continued correctness.
*/
static inline uint64_t
bp_span_in_blocks(uint8_t indblkshift, uint64_t level)
{
unsigned int shift = level * (indblkshift - SPA_BLKPTRSHIFT);
ASSERT3U(shift, <, 64);
return (1ULL << shift);
}
#ifdef __cplusplus
}
#endif
#endif /* _SYS_DMU_TRAVERSE_H */
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