xref: /illumos-gate/usr/src/uts/common/fs/zfs/sys/dmu_traverse.h (revision 8d94f651a44d41a7147253bb5dad1a53941e8f50)
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 /*
53  * Encrypted dnode blocks have encrypted bonus buffers while the rest
54  * of the dnode is left unencrypted. Callers can specify the
55  * TRAVERSE_NO_DECRYPT flag to indicate to the traversal code that
56  * they wish to receive the raw encrypted dnodes instead of attempting
57  * to read the logical data.
58  */
59 #define	TRAVERSE_NO_DECRYPT		(1<<5)
60 
61 /* Special traverse error return value to indicate skipping of children */
62 #define	TRAVERSE_VISIT_NO_CHILDREN	-1
63 
64 int traverse_dataset(struct dsl_dataset *ds,
65     uint64_t txg_start, int flags, blkptr_cb_t func, void *arg);
66 int traverse_dataset_resume(struct dsl_dataset *ds, uint64_t txg_start,
67     zbookmark_phys_t *resume, int flags, blkptr_cb_t func, void *arg);
68 int traverse_dataset_destroyed(spa_t *spa, blkptr_t *blkptr,
69     uint64_t txg_start, zbookmark_phys_t *resume, int flags,
70     blkptr_cb_t func, void *arg);
71 int traverse_pool(spa_t *spa,
72     uint64_t txg_start, int flags, blkptr_cb_t func, void *arg);
73 
74 #ifdef	__cplusplus
75 }
76 #endif
77 
78 #endif /* _SYS_DMU_TRAVERSE_H */
79