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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  * Copyright (c) 2012, 2014 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 
     81 void bpobj_enqueue_subobj(bpobj_t *bpo, uint64_t subobj, dmu_tx_t *tx);
     82 void bpobj_enqueue(bpobj_t *bpo, const blkptr_t *bp, dmu_tx_t *tx);
     83 
     84 int bpobj_space(bpobj_t *bpo,
     85     uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
     86 int bpobj_space_range(bpobj_t *bpo, uint64_t mintxg, uint64_t maxtxg,
     87     uint64_t *usedp, uint64_t *compp, uint64_t *uncompp);
     88 
     89 #ifdef	__cplusplus
     90 }
     91 #endif
     92 
     93 #endif /* _SYS_BPOBJ_H */
     94