diff options
Diffstat (limited to 'sys/contrib/openzfs/include/sys/dmu_traverse.h')
| -rw-r--r-- | sys/contrib/openzfs/include/sys/dmu_traverse.h | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/sys/contrib/openzfs/include/sys/dmu_traverse.h b/sys/contrib/openzfs/include/sys/dmu_traverse.h new file mode 100644 index 000000000000..d76bfe3c9af3 --- /dev/null +++ b/sys/contrib/openzfs/include/sys/dmu_traverse.h @@ -0,0 +1,92 @@ +/* + * 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 */ |