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, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _SYS_DMU_TRAVERSE_H 28 #define _SYS_DMU_TRAVERSE_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 #include <sys/zfs_context.h> 33 #include <sys/spa.h> 34 #include <sys/zio.h> 35 #include <sys/dmu.h> 36 #include <sys/dnode.h> 37 #include <sys/arc.h> 38 39 #ifdef __cplusplus 40 extern "C" { 41 #endif 42 43 #define ADVANCE_POST 0 /* post-order traversal */ 44 #define ADVANCE_PRE 0x01 /* pre-order traversal */ 45 #define ADVANCE_PRUNE 0x02 /* prune by prev snapshot birth time */ 46 #define ADVANCE_DATA 0x04 /* read user data blocks */ 47 #define ADVANCE_HOLES 0x08 /* visit holes */ 48 #define ADVANCE_NOLOCK 0x10 /* Don't grab SPA sync lock */ 49 50 #define ZB_NO_LEVEL -2 51 #define ZB_MAXLEVEL 32 /* Next power of 2 >= DN_MAX_LEVELS */ 52 #define ZB_MAXBLKID (1ULL << 62) 53 #define ZB_MAXOBJSET (1ULL << 62) 54 #define ZB_MAXOBJECT (1ULL << 62) 55 56 #define ZB_MOS_CACHE 0 57 #define ZB_MDN_CACHE 1 58 #define ZB_DN_CACHE 2 59 #define ZB_DEPTH 3 60 61 typedef struct zbookmark { 62 uint64_t zb_objset; 63 uint64_t zb_object; 64 int zb_level; 65 uint64_t zb_blkid; 66 } zbookmark_t; 67 68 typedef struct zseg { 69 uint64_t seg_mintxg; 70 uint64_t seg_maxtxg; 71 zbookmark_t seg_start; 72 zbookmark_t seg_end; 73 list_node_t seg_node; 74 } zseg_t; 75 76 typedef struct traverse_blk_cache { 77 zbookmark_t bc_bookmark; 78 blkptr_t bc_blkptr; 79 void *bc_data; 80 dnode_phys_t *bc_dnode; 81 int bc_errno; 82 int bc_pad1; 83 uint64_t bc_pad2; 84 } traverse_blk_cache_t; 85 86 typedef int (blkptr_cb_t)(traverse_blk_cache_t *bc, spa_t *spa, void *arg); 87 88 struct traverse_handle { 89 spa_t *th_spa; 90 blkptr_cb_t *th_func; 91 void *th_arg; 92 int th_advance; 93 int th_zio_flags; 94 list_t th_seglist; 95 traverse_blk_cache_t th_cache[ZB_DEPTH][ZB_MAXLEVEL]; 96 uint64_t th_hits; 97 uint64_t th_arc_hits; 98 uint64_t th_reads; 99 uint64_t th_callbacks; 100 uint64_t th_syncs; 101 uint64_t th_restarts; 102 zbookmark_t th_noread; 103 zbookmark_t th_lastcb; 104 }; 105 106 int traverse_dsl_dataset(struct dsl_dataset *ds, uint64_t txg_start, 107 int advance, blkptr_cb_t func, void *arg); 108 109 traverse_handle_t *traverse_init(spa_t *spa, blkptr_cb_t *func, void *arg, 110 int advance, int zio_flags); 111 void traverse_fini(traverse_handle_t *th); 112 113 void traverse_add_dnode(traverse_handle_t *th, 114 uint64_t mintxg, uint64_t maxtxg, uint64_t objset, uint64_t object); 115 void traverse_add_objset(traverse_handle_t *th, 116 uint64_t mintxg, uint64_t maxtxg, uint64_t objset); 117 void traverse_add_pool(traverse_handle_t *th, uint64_t mintxg, uint64_t maxtxg); 118 119 int traverse_more(traverse_handle_t *th); 120 121 #ifdef __cplusplus 122 } 123 #endif 124 125 #endif /* _SYS_DMU_TRAVERSE_H */ 126