usr/src/uts/common/fs/zfs/sys/bplist.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 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _SYS_BPLIST_H
  27 #define _SYS_BPLIST_H
  28
  29 #include <sys/dmu.h>
  30 #include <sys/spa.h>
  31 #include <sys/txg.h>
  32 #include <sys/zfs_context.h>
  33
  34 #ifdef  __cplusplus
  35 extern "C" {
  36 #endif
  37
  38 typedef struct bplist_phys {
  39         /*
  40          * This is the bonus buffer for the dead lists.  The object's
  41          * contents is an array of bpl_entries blkptr_t's, representing
  42          * a total of bpl_bytes physical space.
  43          */
  44         uint64_t        bpl_entries;
  45         uint64_t        bpl_bytes;
  46         uint64_t        bpl_comp;
  47         uint64_t        bpl_uncomp;
  48 } bplist_phys_t;
  49
  50 #define BPLIST_SIZE_V0  (2 * sizeof (uint64_t))
  51
  52 typedef struct bplist_q {
  53         blkptr_t        bpq_blk;
  54         void            *bpq_next;
  55 } bplist_q_t;
  56
  57 typedef struct bplist {
  58         kmutex_t        bpl_lock;
  59         objset_t        *bpl_mos;
  60         uint64_t        bpl_object;
  61         uint8_t         bpl_blockshift;
  62         uint8_t         bpl_bpshift;
  63         uint8_t         bpl_havecomp;
  64         bplist_q_t      *bpl_queue;
  65         bplist_phys_t   *bpl_phys;
  66         dmu_buf_t       *bpl_dbuf;
  67         dmu_buf_t       *bpl_cached_dbuf;
  68 } bplist_t;
  69
  70 extern uint64_t bplist_create(objset_t *mos, int blocksize, dmu_tx_t *tx);
  71 extern void bplist_destroy(objset_t *mos, uint64_t object, dmu_tx_t *tx);
  72 extern int bplist_open(bplist_t *bpl, objset_t *mos, uint64_t object);
  73 extern void bplist_close(bplist_t *bpl);
  74 extern boolean_t bplist_empty(bplist_t *bpl);
  75 extern int bplist_iterate(bplist_t *bpl, uint64_t *itorp, blkptr_t *bp);
  76 extern int bplist_enqueue(bplist_t *bpl, const blkptr_t *bp, dmu_tx_t *tx);
  77 extern void bplist_enqueue_deferred(bplist_t *bpl, const blkptr_t *bp);
  78 extern void bplist_sync(bplist_t *bpl, dmu_tx_t *tx);
  79 extern void bplist_vacate(bplist_t *bpl, dmu_tx_t *tx);
  80 extern int bplist_space(bplist_t *bpl,
  81     uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
  82 extern int bplist_space_birthrange(bplist_t *bpl,
  83     uint64_t mintxg, uint64_t maxtxg, uint64_t *dasizep);
  84
  85 #ifdef  __cplusplus
  86 }
  87 #endif
  88
  89 #endif /* _SYS_BPLIST_H */