projects / mirror_zfs.git / blame
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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) 2010, Oracle and/or its affiliates. All rights reserved. | |
| 23 | */ | |
| 24 | ||
| 25 | #ifndef _SYS_BPOBJ_H | |
| 26 | #define _SYS_BPOBJ_H | |
| 27 | ||
| 28 | #include <sys/dmu.h> | |
| 29 | #include <sys/spa.h> | |
| 30 | #include <sys/txg.h> | |
| 31 | #include <sys/zio.h> | |
| 32 | #include <sys/zfs_context.h> | |
| 33 | ||
| 34 | #ifdef __cplusplus | |
| 35 | extern "C" { | |
| 36 | #endif | |
| 37 | ||
| 38 | typedef struct bpobj_phys { | |
| 39 | /* | |
| 40 | * This is the bonus buffer for the dead lists. The object's | |
| 41 | * contents is an array of bpo_entries blkptr_t's, representing | |
| 42 | * a total of bpo_bytes physical space. | |
| 43 | */ | |
| 44 | uint64_t bpo_num_blkptrs; | |
| 45 | uint64_t bpo_bytes; | |
| 46 | uint64_t bpo_comp; | |
| 47 | uint64_t bpo_uncomp; | |
| 48 | uint64_t bpo_subobjs; | |
| 49 | uint64_t bpo_num_subobjs; | |
| 50 | } bpobj_phys_t; | |
| 51 | ||
| 52 | #define BPOBJ_SIZE_V0 (2 * sizeof (uint64_t)) | |
| 53 | #define BPOBJ_SIZE_V1 (4 * sizeof (uint64_t)) | |
| 54 | ||
| 55 | typedef struct bpobj { | |
| 56 | kmutex_t bpo_lock; | |
| 57 | objset_t *bpo_os; | |
| 58 | uint64_t bpo_object; | |
| 59 | int bpo_epb; | |
| 60 | uint8_t bpo_havecomp; | |
| 61 | uint8_t bpo_havesubobj; | |
| 62 | bpobj_phys_t *bpo_phys; | |
| 63 | dmu_buf_t *bpo_dbuf; | |
| 64 | dmu_buf_t *bpo_cached_dbuf; | |
| 65 | } bpobj_t; | |
| 66 | ||
| 67 | typedef int bpobj_itor_t(void *arg, const blkptr_t *bp, dmu_tx_t *tx); | |
| 68 | ||
| 69 | uint64_t bpobj_alloc(objset_t *mos, int blocksize, dmu_tx_t *tx); | |
| 70 | void bpobj_free(objset_t *os, uint64_t obj, dmu_tx_t *tx); | |
| 71 | ||
| 72 | int bpobj_open(bpobj_t *bpo, objset_t *mos, uint64_t object); | |
| 73 | void bpobj_close(bpobj_t *bpo); | |
| 74 | ||
| 75 | int bpobj_iterate(bpobj_t *bpo, bpobj_itor_t func, void *arg, dmu_tx_t *tx); | |
| 76 | int bpobj_iterate_nofree(bpobj_t *bpo, bpobj_itor_t func, void *, dmu_tx_t *); | |
| 77 | int bpobj_iterate_dbg(bpobj_t *bpo, uint64_t *itorp, blkptr_t *bp); | |
| 78 | ||
| 79 | void bpobj_enqueue_subobj(bpobj_t *bpo, uint64_t subobj, dmu_tx_t *tx); | |
| 80 | void bpobj_enqueue(bpobj_t *bpo, const blkptr_t *bp, dmu_tx_t *tx); | |
| 81 | ||
| 82 | int bpobj_space(bpobj_t *bpo, | |
| 83 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp); | |
| 84 | int bpobj_space_range(bpobj_t *bpo, uint64_t mintxg, uint64_t maxtxg, | |
| 85 | uint64_t *usedp, uint64_t *compp, uint64_t *uncompp); | |
| 86 | ||
| 87 | #ifdef __cplusplus | |
| 88 | } | |
| 89 | #endif | |
| 90 | ||
| 91 | #endif /* _SYS_BPOBJ_H */ |