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/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2005 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#ifndef _SYS_DMU_TRAVERSE_H
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#define _SYS_DMU_TRAVERSE_H
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#pragma ident "%Z%%M% %I% %E% SMI"
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#include <sys/zfs_context.h>
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#include <sys/spa.h>
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#include <sys/zio.h>
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#include <sys/dmu.h>
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#include <sys/dnode.h>
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#include <sys/arc.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define ADVANCE_POST 0 /* post-order traversal */
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#define ADVANCE_PRE 0x01 /* pre-order traversal */
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#define ADVANCE_PRUNE 0x02 /* prune by prev snapshot birth time */
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#define ADVANCE_DATA 0x04 /* read user data blocks */
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#define ADVANCE_HOLES 0x08 /* visit holes */
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#define ADVANCE_NOLOCK 0x10 /* Don't grab SPA sync lock */
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#define ZB_NO_LEVEL -2
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#define ZB_MAXLEVEL 32 /* Next power of 2 >= DN_MAX_LEVELS */
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#define ZB_MAXBLKID (1ULL << 62)
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#define ZB_MAXOBJSET (1ULL << 62)
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#define ZB_MAXOBJECT (1ULL << 62)
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#define ZB_MOS_CACHE 0
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#define ZB_MDN_CACHE 1
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#define ZB_DN_CACHE 2
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#define ZB_DEPTH 3
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typedef struct zbookmark {
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uint64_t zb_objset;
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uint64_t zb_object;
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int zb_level;
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uint64_t zb_blkid;
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} zbookmark_t;
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typedef struct zseg {
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uint64_t seg_mintxg;
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uint64_t seg_maxtxg;
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zbookmark_t seg_start;
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zbookmark_t seg_end;
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list_node_t seg_node;
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} zseg_t;
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typedef struct traverse_blk_cache {
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zbookmark_t bc_bookmark;
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blkptr_t bc_blkptr;
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void *bc_data;
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dnode_phys_t *bc_dnode;
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int bc_errno;
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int bc_pad1;
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uint64_t bc_pad2;
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} traverse_blk_cache_t;
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typedef int (blkptr_cb_t)(traverse_blk_cache_t *bc, spa_t *spa, void *arg);
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struct traverse_handle {
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spa_t *th_spa;
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blkptr_cb_t *th_func;
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void *th_arg;
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int th_advance;
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int th_zio_flags;
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list_t th_seglist;
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traverse_blk_cache_t th_cache[ZB_DEPTH][ZB_MAXLEVEL];
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uint64_t th_hits;
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uint64_t th_arc_hits;
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uint64_t th_reads;
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uint64_t th_callbacks;
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uint64_t th_syncs;
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uint64_t th_restarts;
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zbookmark_t th_noread;
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zbookmark_t th_lastcb;
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};
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int traverse_dsl_dataset(struct dsl_dataset *ds, uint64_t txg_start,
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int advance, blkptr_cb_t func, void *arg);
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traverse_handle_t *traverse_init(spa_t *spa, blkptr_cb_t *func, void *arg,
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int advance, int zio_flags);
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void traverse_fini(traverse_handle_t *th);
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void traverse_add_dnode(traverse_handle_t *th,
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uint64_t mintxg, uint64_t maxtxg, uint64_t objset, uint64_t object);
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void traverse_add_objset(traverse_handle_t *th,
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uint64_t mintxg, uint64_t maxtxg, uint64_t objset);
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void traverse_add_pool(traverse_handle_t *th, uint64_t mintxg, uint64_t maxtxg);
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int traverse_more(traverse_handle_t *th);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _SYS_DMU_TRAVERSE_H */
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