usr/src/uts/common/fs/zfs/sys/bpobj.h

   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  * Copyright (c) 2012 by Delphix. All rights reserved.
  24  */
  25
  26 #ifndef _SYS_BPOBJ_H
  27 #define _SYS_BPOBJ_H
  28
  29 #include <sys/dmu.h>
  30 #include <sys/spa.h>
  31 #include <sys/txg.h>
  32 #include <sys/zio.h>
  33 #include <sys/zfs_context.h>
  34
  35 #ifdef  __cplusplus
  36 extern "C" {
  37 #endif
  38
  39 typedef struct bpobj_phys {
  40         /*
  41          * This is the bonus buffer for the dead lists.  The object's
  42          * contents is an array of bpo_entries blkptr_t's, representing
  43          * a total of bpo_bytes physical space.
  44          */
  45         uint64_t        bpo_num_blkptrs;
  46         uint64_t        bpo_bytes;
  47         uint64_t        bpo_comp;
  48         uint64_t        bpo_uncomp;
  49         uint64_t        bpo_subobjs;
  50         uint64_t        bpo_num_subobjs;
  51 } bpobj_phys_t;
  52
  53 #define BPOBJ_SIZE_V0   (2 * sizeof (uint64_t))
  54 #define BPOBJ_SIZE_V1   (4 * sizeof (uint64_t))
  55
  56 typedef struct bpobj {
  57         kmutex_t        bpo_lock;
  58         objset_t        *bpo_os;
  59         uint64_t        bpo_object;
  60         int             bpo_epb;
  61         uint8_t         bpo_havecomp;
  62         uint8_t         bpo_havesubobj;
  63         bpobj_phys_t    *bpo_phys;
  64         dmu_buf_t       *bpo_dbuf;
  65         dmu_buf_t       *bpo_cached_dbuf;
  66 } bpobj_t;
  67
  68 typedef int bpobj_itor_t(void *arg, const blkptr_t *bp, dmu_tx_t *tx);
  69
  70 uint64_t bpobj_alloc(objset_t *mos, int blocksize, dmu_tx_t *tx);
  71 uint64_t bpobj_alloc_empty(objset_t *os, int blocksize, dmu_tx_t *tx);
  72 void bpobj_free(objset_t *os, uint64_t obj, dmu_tx_t *tx);
  73 void bpobj_decr_empty(objset_t *os, dmu_tx_t *tx);
  74
  75 int bpobj_open(bpobj_t *bpo, objset_t *mos, uint64_t object);
  76 void bpobj_close(bpobj_t *bpo);
  77
  78 int bpobj_iterate(bpobj_t *bpo, bpobj_itor_t func, void *arg, dmu_tx_t *tx);
  79 int bpobj_iterate_nofree(bpobj_t *bpo, bpobj_itor_t func, void *, dmu_tx_t *);
  80 int bpobj_iterate_dbg(bpobj_t *bpo, uint64_t *itorp, blkptr_t *bp);
  81
  82 void bpobj_enqueue_subobj(bpobj_t *bpo, uint64_t subobj, dmu_tx_t *tx);
  83 void bpobj_enqueue(bpobj_t *bpo, const blkptr_t *bp, dmu_tx_t *tx);
  84
  85 int bpobj_space(bpobj_t *bpo,
  86     uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
  87 int bpobj_space_range(bpobj_t *bpo, uint64_t mintxg, uint64_t maxtxg,
  88     uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
  89
  90 #ifdef  __cplusplus
  91 }
  92 #endif
  93
  94 #endif /* _SYS_BPOBJ_H */