include/zfs/spa.h - github/trini/u-boot - Gitiles

 /*
  *  GRUB  --  GRand Unified Bootloader
  *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
 /*
  * Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
  */

 #ifndef ZFS_SPA_HEADER
 #define	ZFS_SPA_HEADER 1


 /*
  * General-purpose 32-bit and 64-bit bitfield encodings.
  */
 #define	BF32_DECODE(x, low, len)	P2PHASE((x) >> (low), 1U << (len))
 #define	BF64_DECODE(x, low, len)	P2PHASE((x) >> (low), 1ULL << (len))
 #define	BF32_ENCODE(x, low, len)	(P2PHASE((x), 1U << (len)) << (low))
 #define	BF64_ENCODE(x, low, len)	(P2PHASE((x), 1ULL << (len)) << (low))

 #define	BF32_GET(x, low, len)		BF32_DECODE(x, low, len)
 #define	BF64_GET(x, low, len)		BF64_DECODE(x, low, len)

 #define	BF32_SET(x, low, len, val)						\
 	((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len))
 #define	BF64_SET(x, low, len, val)						\
 	((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len))

 #define	BF32_GET_SB(x, low, len, shift, bias)		\
 	((BF32_GET(x, low, len) + (bias)) << (shift))
 #define	BF64_GET_SB(x, low, len, shift, bias)		\
 	((BF64_GET(x, low, len) + (bias)) << (shift))

 #define	BF32_SET_SB(x, low, len, shift, bias, val)		\
 	BF32_SET(x, low, len, ((val) >> (shift)) - (bias))
 #define	BF64_SET_SB(x, low, len, shift, bias, val)		\
 	BF64_SET(x, low, len, ((val) >> (shift)) - (bias))

 /*
  * We currently support nine block sizes, from 512 bytes to 128K.
  * We could go higher, but the benefits are near-zero and the cost
  * of COWing a giant block to modify one byte would become excessive.
  */
 #define	SPA_MINBLOCKSHIFT	9
 #define	SPA_MAXBLOCKSHIFT	17
 #define	SPA_MINBLOCKSIZE	(1ULL << SPA_MINBLOCKSHIFT)
 #define	SPA_MAXBLOCKSIZE	(1ULL << SPA_MAXBLOCKSHIFT)

 #define	SPA_BLOCKSIZES		(SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1)

 /*
  * Size of block to hold the configuration data (a packed nvlist)
  */
 #define	SPA_CONFIG_BLOCKSIZE	(1 << 14)

 /*
  * The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
  * The ASIZE encoding should be at least 64 times larger (6 more bits)
  * to support up to 4-way RAID-Z mirror mode with worst-case gang block
  * overhead, three DVAs per bp, plus one more bit in case we do anything
  * else that expands the ASIZE.
  */
 #define	SPA_LSIZEBITS		16	/* LSIZE up to 32M (2^16 * 512)	*/
 #define	SPA_PSIZEBITS		16	/* PSIZE up to 32M (2^16 * 512)	*/
 #define	SPA_ASIZEBITS		24	/* ASIZE up to 64 times larger	*/

 /*
  * All SPA data is represented by 128-bit data virtual addresses (DVAs).
  * The members of the dva_t should be considered opaque outside the SPA.
  */
 typedef struct dva {
 	uint64_t	dva_word[2];
 } dva_t;

 /*
  * Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
  */
 typedef struct zio_cksum {
 	uint64_t	zc_word[4];
 } zio_cksum_t;

 /*
  * Each block is described by its DVAs, time of birth, checksum, etc.
  * The word-by-word, bit-by-bit layout of the blkptr is as follows:
  *
  *	64	56	48	40	32	24	16	8	0
  *	+-------+-------+-------+-------+-------+-------+-------+-------+
  * 0	|		vdev1		| GRID	|	  ASIZE		|
  *	+-------+-------+-------+-------+-------+-------+-------+-------+
  * 1	|G|			 offset1				|
  *	+-------+-------+-------+-------+-------+-------+-------+-------+
  * 2	|		vdev2		| GRID	|	  ASIZE		|
  *	+-------+-------+-------+-------+-------+-------+-------+-------+
  * 3	|G|			 offset2				|
  *	+-------+-------+-------+-------+-------+-------+-------+-------+
  * 4	|		vdev3		| GRID	|	  ASIZE		|
  *	+-------+-------+-------+-------+-------+-------+-------+-------+
  * 5	|G|			 offset3				|
  *	+-------+-------+-------+-------+-------+-------+-------+-------+
  * 6	|BDX|lvl| type	| cksum | comp	|	  PSIZE	|	  LSIZE	|
  *	+-------+-------+-------+-------+-------+-------+-------+-------+
  * 7	|			padding					|
  *	+-------+-------+-------+-------+-------+-------+-------+-------+
  * 8	|			padding					|
  *	+-------+-------+-------+-------+-------+-------+-------+-------+
  * 9	|			physical birth txg			|
  *	+-------+-------+-------+-------+-------+-------+-------+-------+
  * a	|			logical birth txg			|
  *	+-------+-------+-------+-------+-------+-------+-------+-------+
  * b	|			fill count				|
  *	+-------+-------+-------+-------+-------+-------+-------+-------+
  * c	|			checksum[0]				|
  *	+-------+-------+-------+-------+-------+-------+-------+-------+
  * d	|			checksum[1]				|
  *	+-------+-------+-------+-------+-------+-------+-------+-------+
  * e	|			checksum[2]				|
  *	+-------+-------+-------+-------+-------+-------+-------+-------+
  * f	|			checksum[3]				|
  *	+-------+-------+-------+-------+-------+-------+-------+-------+
  *
  * Legend:
  *
  * vdev		virtual device ID
  * offset	offset into virtual device
  * LSIZE	logical size
  * PSIZE	physical size (after compression)
  * ASIZE	allocated size (including RAID-Z parity and gang block headers)
  * GRID		RAID-Z layout information (reserved for future use)
  * cksum	checksum function
  * comp		compression function
  * G		gang block indicator
  * B		byteorder (endianness)
  * D		dedup
  * X		unused
  * lvl		level of indirection
  * type		DMU object type
  * phys birth	txg of block allocation; zero if same as logical birth txg
  * log. birth	transaction group in which the block was logically born
  * fill count	number of non-zero blocks under this bp
  * checksum[4]	256-bit checksum of the data this bp describes
  */
 #define	SPA_BLKPTRSHIFT	7		/* blkptr_t is 128 bytes	*/
 #define	SPA_DVAS_PER_BP	3		/* Number of DVAs in a bp	*/

 typedef struct blkptr {
 	dva_t		blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */
 	uint64_t	blk_prop;	/* size, compression, type, etc		*/
 	uint64_t	blk_pad[2];	/* Extra space for the future		*/
 	uint64_t	blk_phys_birth;	/* txg when block was allocated		*/
 	uint64_t	blk_birth;	/* transaction group at birth		*/
 	uint64_t	blk_fill;	/* fill count				*/
 	zio_cksum_t	blk_cksum;	/* 256-bit checksum			*/
 } blkptr_t;

 /*
  * Macros to get and set fields in a bp or DVA.
  */
 #define	DVA_GET_ASIZE(dva)											\
 	BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0)
 #define	DVA_SET_ASIZE(dva, x)										\
 	BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x)

 #define	DVA_GET_GRID(dva)	BF64_GET((dva)->dva_word[0], 24, 8)
 #define	DVA_SET_GRID(dva, x)	BF64_SET((dva)->dva_word[0], 24, 8, x)

 #define	DVA_GET_VDEV(dva)	BF64_GET((dva)->dva_word[0], 32, 32)
 #define	DVA_SET_VDEV(dva, x)	BF64_SET((dva)->dva_word[0], 32, 32, x)

 #define	DVA_GET_GANG(dva)	BF64_GET((dva)->dva_word[1], 63, 1)
 #define	DVA_SET_GANG(dva, x)	BF64_SET((dva)->dva_word[1], 63, 1, x)

 #define	BP_GET_LSIZE(bp)										\
 	BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)
 #define	BP_SET_LSIZE(bp, x)										\
 	BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)

 #define	BP_GET_COMPRESS(bp)		BF64_GET((bp)->blk_prop, 32, 8)
 #define	BP_SET_COMPRESS(bp, x)		BF64_SET((bp)->blk_prop, 32, 8, x)

 #define	BP_GET_CHECKSUM(bp)		BF64_GET((bp)->blk_prop, 40, 8)
 #define	BP_SET_CHECKSUM(bp, x)		BF64_SET((bp)->blk_prop, 40, 8, x)

 #define	BP_GET_TYPE(bp)			BF64_GET((bp)->blk_prop, 48, 8)
 #define	BP_SET_TYPE(bp, x)		BF64_SET((bp)->blk_prop, 48, 8, x)

 #define	BP_GET_LEVEL(bp)		BF64_GET((bp)->blk_prop, 56, 5)
 #define	BP_SET_LEVEL(bp, x)		BF64_SET((bp)->blk_prop, 56, 5, x)

 #define	BP_GET_PROP_BIT_61(bp)		BF64_GET((bp)->blk_prop, 61, 1)
 #define	BP_SET_PROP_BIT_61(bp, x)	BF64_SET((bp)->blk_prop, 61, 1, x)

 #define	BP_GET_DEDUP(bp)		BF64_GET((bp)->blk_prop, 62, 1)
 #define	BP_SET_DEDUP(bp, x)		BF64_SET((bp)->blk_prop, 62, 1, x)

 #define	BP_GET_BYTEORDER(bp)		(0 - BF64_GET((bp)->blk_prop, 63, 1))
 #define	BP_SET_BYTEORDER(bp, x)		BF64_SET((bp)->blk_prop, 63, 1, x)

 #define	BP_PHYSICAL_BIRTH(bp)										\
 	((bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth)

 #define	BP_SET_BIRTH(bp, logical, physical)								\
 	{																	\
 		(bp)->blk_birth = (logical);									\
 		(bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \
 	}

 #define	BP_GET_ASIZE(bp)												\
 	(DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
 	 DVA_GET_ASIZE(&(bp)->blk_dva[2]))

 #define	BP_GET_UCSIZE(bp)												\
 	((BP_GET_LEVEL(bp) > 0 || dmu_ot[BP_GET_TYPE(bp)].ot_metadata) ?	\
 	 BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp));

 #define	BP_GET_NDVAS(bp)						\
 	(!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) +		\
 	 !!DVA_GET_ASIZE(&(bp)->blk_dva[1]) +		\
 	 !!DVA_GET_ASIZE(&(bp)->blk_dva[2]))

 #define	BP_COUNT_GANG(bp)						\
 	(DVA_GET_GANG(&(bp)->blk_dva[0]) +			\
 	 DVA_GET_GANG(&(bp)->blk_dva[1]) +			\
 	 DVA_GET_GANG(&(bp)->blk_dva[2]))

 #define	DVA_EQUAL(dva1, dva2)						\
 	((dva1)->dva_word[1] == (dva2)->dva_word[1] &&	\
 	 (dva1)->dva_word[0] == (dva2)->dva_word[0])

 #define	BP_EQUAL(bp1, bp2)									\
 	(BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) &&	\
 	 DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) &&	\
 	 DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) &&	\
 	 DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2]))

 #define	ZIO_CHECKSUM_EQUAL(zc1, zc2)				\
 	(0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) |	\
 		   ((zc1).zc_word[1] - (zc2).zc_word[1]) |	\
 		   ((zc1).zc_word[2] - (zc2).zc_word[2]) |	\
 		   ((zc1).zc_word[3] - (zc2).zc_word[3])))

 #define	DVA_IS_VALID(dva)	(DVA_GET_ASIZE(dva) != 0)

 #define	ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3)	\
 	{											\
 		(zcp)->zc_word[0] = w0;					\
 		(zcp)->zc_word[1] = w1;					\
 		(zcp)->zc_word[2] = w2;					\
 		(zcp)->zc_word[3] = w3;					\
 	}

 #define	BP_IDENTITY(bp)		(&(bp)->blk_dva[0])
 #define	BP_IS_GANG(bp)		DVA_GET_GANG(BP_IDENTITY(bp))
 #define	BP_IS_HOLE(bp)		((bp)->blk_birth == 0)

 /* BP_IS_RAIDZ(bp) assumes no block compression */
 #define	BP_IS_RAIDZ(bp)		(DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \
 							 BP_GET_PSIZE(bp))

 #define	BP_ZERO(bp)										\
 	{													\
 		(bp)->blk_dva[0].dva_word[0] = 0;				\
 		(bp)->blk_dva[0].dva_word[1] = 0;				\
 		(bp)->blk_dva[1].dva_word[0] = 0;				\
 		(bp)->blk_dva[1].dva_word[1] = 0;				\
 		(bp)->blk_dva[2].dva_word[0] = 0;				\
 		(bp)->blk_dva[2].dva_word[1] = 0;				\
 		(bp)->blk_prop = 0;								\
 		(bp)->blk_pad[0] = 0;							\
 		(bp)->blk_pad[1] = 0;							\
 		(bp)->blk_phys_birth = 0;						\
 		(bp)->blk_birth = 0;							\
 		(bp)->blk_fill = 0;								\
 		ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0);	\
 	}

 #define	BP_SPRINTF_LEN	320

 #endif	/* ! ZFS_SPA_HEADER */
	/*
	* GRUB -- GRand Unified Bootloader
	* Copyright (C) 1999,2000,2001,2002,2003,2004 Free Software Foundation, Inc.
	*
	* SPDX-License-Identifier: GPL-2.0+
	*/
	/*
	* Copyright (c) 2008, 2011, Oracle and/or its affiliates. All rights reserved.
	*/

	#ifndef ZFS_SPA_HEADER
	#define ZFS_SPA_HEADER 1


	/*
	* General-purpose 32-bit and 64-bit bitfield encodings.
	*/
	#define BF32_DECODE(x, low, len) P2PHASE((x) >> (low), 1U << (len))
	#define BF64_DECODE(x, low, len) P2PHASE((x) >> (low), 1ULL << (len))
	#define BF32_ENCODE(x, low, len) (P2PHASE((x), 1U << (len)) << (low))
	#define BF64_ENCODE(x, low, len) (P2PHASE((x), 1ULL << (len)) << (low))

	#define BF32_GET(x, low, len) BF32_DECODE(x, low, len)
	#define BF64_GET(x, low, len) BF64_DECODE(x, low, len)

	#define BF32_SET(x, low, len, val) \
	((x) ^= BF32_ENCODE((x >> low) ^ (val), low, len))
	#define BF64_SET(x, low, len, val) \
	((x) ^= BF64_ENCODE((x >> low) ^ (val), low, len))

	#define BF32_GET_SB(x, low, len, shift, bias) \
	((BF32_GET(x, low, len) + (bias)) << (shift))
	#define BF64_GET_SB(x, low, len, shift, bias) \
	((BF64_GET(x, low, len) + (bias)) << (shift))

	#define BF32_SET_SB(x, low, len, shift, bias, val) \
	BF32_SET(x, low, len, ((val) >> (shift)) - (bias))
	#define BF64_SET_SB(x, low, len, shift, bias, val) \
	BF64_SET(x, low, len, ((val) >> (shift)) - (bias))

	/*
	* We currently support nine block sizes, from 512 bytes to 128K.
	* We could go higher, but the benefits are near-zero and the cost
	* of COWing a giant block to modify one byte would become excessive.
	*/
	#define SPA_MINBLOCKSHIFT 9
	#define SPA_MAXBLOCKSHIFT 17
	#define SPA_MINBLOCKSIZE (1ULL << SPA_MINBLOCKSHIFT)
	#define SPA_MAXBLOCKSIZE (1ULL << SPA_MAXBLOCKSHIFT)

	#define SPA_BLOCKSIZES (SPA_MAXBLOCKSHIFT - SPA_MINBLOCKSHIFT + 1)

	/*
	* Size of block to hold the configuration data (a packed nvlist)
	*/
	#define SPA_CONFIG_BLOCKSIZE (1 << 14)

	/*
	* The DVA size encodings for LSIZE and PSIZE support blocks up to 32MB.
	* The ASIZE encoding should be at least 64 times larger (6 more bits)
	* to support up to 4-way RAID-Z mirror mode with worst-case gang block
	* overhead, three DVAs per bp, plus one more bit in case we do anything
	* else that expands the ASIZE.
	*/
	#define SPA_LSIZEBITS 16 /* LSIZE up to 32M (2^16 * 512) */
	#define SPA_PSIZEBITS 16 /* PSIZE up to 32M (2^16 * 512) */
	#define SPA_ASIZEBITS 24 /* ASIZE up to 64 times larger */

	/*
	* All SPA data is represented by 128-bit data virtual addresses (DVAs).
	* The members of the dva_t should be considered opaque outside the SPA.
	*/
	typedef struct dva {
	uint64_t dva_word[2];
	} dva_t;

	/*
	* Each block has a 256-bit checksum -- strong enough for cryptographic hashes.
	*/
	typedef struct zio_cksum {
	uint64_t zc_word[4];
	} zio_cksum_t;

	/*
	* Each block is described by its DVAs, time of birth, checksum, etc.
	* The word-by-word, bit-by-bit layout of the blkptr is as follows:
	*
	* 64 56 48 40 32 24 16 8 0
	* +-------+-------+-------+-------+-------+-------+-------+-------+
	* 0 \| vdev1 \| GRID \| ASIZE \|
	* +-------+-------+-------+-------+-------+-------+-------+-------+
	* 1 \|G\| offset1 \|
	* +-------+-------+-------+-------+-------+-------+-------+-------+
	* 2 \| vdev2 \| GRID \| ASIZE \|
	* +-------+-------+-------+-------+-------+-------+-------+-------+
	* 3 \|G\| offset2 \|
	* +-------+-------+-------+-------+-------+-------+-------+-------+
	* 4 \| vdev3 \| GRID \| ASIZE \|
	* +-------+-------+-------+-------+-------+-------+-------+-------+
	* 5 \|G\| offset3 \|
	* +-------+-------+-------+-------+-------+-------+-------+-------+
	* 6 \|BDX\|lvl\| type \| cksum \| comp \| PSIZE \| LSIZE \|
	* +-------+-------+-------+-------+-------+-------+-------+-------+
	* 7 \| padding \|
	* +-------+-------+-------+-------+-------+-------+-------+-------+
	* 8 \| padding \|
	* +-------+-------+-------+-------+-------+-------+-------+-------+
	* 9 \| physical birth txg \|
	* +-------+-------+-------+-------+-------+-------+-------+-------+
	* a \| logical birth txg \|
	* +-------+-------+-------+-------+-------+-------+-------+-------+
	* b \| fill count \|
	* +-------+-------+-------+-------+-------+-------+-------+-------+
	* c \| checksum[0] \|
	* +-------+-------+-------+-------+-------+-------+-------+-------+
	* d \| checksum[1] \|
	* +-------+-------+-------+-------+-------+-------+-------+-------+
	* e \| checksum[2] \|
	* +-------+-------+-------+-------+-------+-------+-------+-------+
	* f \| checksum[3] \|
	* +-------+-------+-------+-------+-------+-------+-------+-------+
	*
	* Legend:
	*
	* vdev virtual device ID
	* offset offset into virtual device
	* LSIZE logical size
	* PSIZE physical size (after compression)
	* ASIZE allocated size (including RAID-Z parity and gang block headers)
	* GRID RAID-Z layout information (reserved for future use)
	* cksum checksum function
	* comp compression function
	* G gang block indicator
	* B byteorder (endianness)
	* D dedup
	* X unused
	* lvl level of indirection
	* type DMU object type
	* phys birth txg of block allocation; zero if same as logical birth txg
	* log. birth transaction group in which the block was logically born
	* fill count number of non-zero blocks under this bp
	* checksum[4] 256-bit checksum of the data this bp describes
	*/
	#define SPA_BLKPTRSHIFT 7 /* blkptr_t is 128 bytes */
	#define SPA_DVAS_PER_BP 3 /* Number of DVAs in a bp */

	typedef struct blkptr {
	dva_t blk_dva[SPA_DVAS_PER_BP]; /* Data Virtual Addresses */
	uint64_t blk_prop; /* size, compression, type, etc */
	uint64_t blk_pad[2]; /* Extra space for the future */
	uint64_t blk_phys_birth; /* txg when block was allocated */
	uint64_t blk_birth; /* transaction group at birth */
	uint64_t blk_fill; /* fill count */
	zio_cksum_t blk_cksum; /* 256-bit checksum */
	} blkptr_t;

	/*
	* Macros to get and set fields in a bp or DVA.
	*/
	#define DVA_GET_ASIZE(dva) \
	BF64_GET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0)
	#define DVA_SET_ASIZE(dva, x) \
	BF64_SET_SB((dva)->dva_word[0], 0, 24, SPA_MINBLOCKSHIFT, 0, x)

	#define DVA_GET_GRID(dva) BF64_GET((dva)->dva_word[0], 24, 8)
	#define DVA_SET_GRID(dva, x) BF64_SET((dva)->dva_word[0], 24, 8, x)

	#define DVA_GET_VDEV(dva) BF64_GET((dva)->dva_word[0], 32, 32)
	#define DVA_SET_VDEV(dva, x) BF64_SET((dva)->dva_word[0], 32, 32, x)

	#define DVA_GET_GANG(dva) BF64_GET((dva)->dva_word[1], 63, 1)
	#define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x)

	#define BP_GET_LSIZE(bp) \
	BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)
	#define BP_SET_LSIZE(bp, x) \
	BF64_SET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)

	#define BP_GET_COMPRESS(bp) BF64_GET((bp)->blk_prop, 32, 8)
	#define BP_SET_COMPRESS(bp, x) BF64_SET((bp)->blk_prop, 32, 8, x)

	#define BP_GET_CHECKSUM(bp) BF64_GET((bp)->blk_prop, 40, 8)
	#define BP_SET_CHECKSUM(bp, x) BF64_SET((bp)->blk_prop, 40, 8, x)

	#define BP_GET_TYPE(bp) BF64_GET((bp)->blk_prop, 48, 8)
	#define BP_SET_TYPE(bp, x) BF64_SET((bp)->blk_prop, 48, 8, x)

	#define BP_GET_LEVEL(bp) BF64_GET((bp)->blk_prop, 56, 5)
	#define BP_SET_LEVEL(bp, x) BF64_SET((bp)->blk_prop, 56, 5, x)

	#define BP_GET_PROP_BIT_61(bp) BF64_GET((bp)->blk_prop, 61, 1)
	#define BP_SET_PROP_BIT_61(bp, x) BF64_SET((bp)->blk_prop, 61, 1, x)

	#define BP_GET_DEDUP(bp) BF64_GET((bp)->blk_prop, 62, 1)
	#define BP_SET_DEDUP(bp, x) BF64_SET((bp)->blk_prop, 62, 1, x)

	#define BP_GET_BYTEORDER(bp) (0 - BF64_GET((bp)->blk_prop, 63, 1))
	#define BP_SET_BYTEORDER(bp, x) BF64_SET((bp)->blk_prop, 63, 1, x)

	#define BP_PHYSICAL_BIRTH(bp) \
	((bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth)

	#define BP_SET_BIRTH(bp, logical, physical) \
	{ \
	(bp)->blk_birth = (logical); \
	(bp)->blk_phys_birth = ((logical) == (physical) ? 0 : (physical)); \
	}

	#define BP_GET_ASIZE(bp) \
	(DVA_GET_ASIZE(&(bp)->blk_dva[0]) + DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
	DVA_GET_ASIZE(&(bp)->blk_dva[2]))

	#define BP_GET_UCSIZE(bp) \
	((BP_GET_LEVEL(bp) > 0 \|\| dmu_ot[BP_GET_TYPE(bp)].ot_metadata) ? \
	BP_GET_PSIZE(bp) : BP_GET_LSIZE(bp));

	#define BP_GET_NDVAS(bp) \
	(!!DVA_GET_ASIZE(&(bp)->blk_dva[0]) + \
	!!DVA_GET_ASIZE(&(bp)->blk_dva[1]) + \
	!!DVA_GET_ASIZE(&(bp)->blk_dva[2]))

	#define BP_COUNT_GANG(bp) \
	(DVA_GET_GANG(&(bp)->blk_dva[0]) + \
	DVA_GET_GANG(&(bp)->blk_dva[1]) + \
	DVA_GET_GANG(&(bp)->blk_dva[2]))

	#define DVA_EQUAL(dva1, dva2) \
	((dva1)->dva_word[1] == (dva2)->dva_word[1] && \
	(dva1)->dva_word[0] == (dva2)->dva_word[0])

	#define BP_EQUAL(bp1, bp2) \
	(BP_PHYSICAL_BIRTH(bp1) == BP_PHYSICAL_BIRTH(bp2) && \
	DVA_EQUAL(&(bp1)->blk_dva[0], &(bp2)->blk_dva[0]) && \
	DVA_EQUAL(&(bp1)->blk_dva[1], &(bp2)->blk_dva[1]) && \
	DVA_EQUAL(&(bp1)->blk_dva[2], &(bp2)->blk_dva[2]))

	#define ZIO_CHECKSUM_EQUAL(zc1, zc2) \
	(0 == (((zc1).zc_word[0] - (zc2).zc_word[0]) \| \
	((zc1).zc_word[1] - (zc2).zc_word[1]) \| \
	((zc1).zc_word[2] - (zc2).zc_word[2]) \| \
	((zc1).zc_word[3] - (zc2).zc_word[3])))

	#define DVA_IS_VALID(dva) (DVA_GET_ASIZE(dva) != 0)

	#define ZIO_SET_CHECKSUM(zcp, w0, w1, w2, w3) \
	{ \
	(zcp)->zc_word[0] = w0; \
	(zcp)->zc_word[1] = w1; \
	(zcp)->zc_word[2] = w2; \
	(zcp)->zc_word[3] = w3; \
	}

	#define BP_IDENTITY(bp) (&(bp)->blk_dva[0])
	#define BP_IS_GANG(bp) DVA_GET_GANG(BP_IDENTITY(bp))
	#define BP_IS_HOLE(bp) ((bp)->blk_birth == 0)

	/* BP_IS_RAIDZ(bp) assumes no block compression */
	#define BP_IS_RAIDZ(bp) (DVA_GET_ASIZE(&(bp)->blk_dva[0]) > \
	BP_GET_PSIZE(bp))

	#define BP_ZERO(bp) \
	{ \
	(bp)->blk_dva[0].dva_word[0] = 0; \
	(bp)->blk_dva[0].dva_word[1] = 0; \
	(bp)->blk_dva[1].dva_word[0] = 0; \
	(bp)->blk_dva[1].dva_word[1] = 0; \
	(bp)->blk_dva[2].dva_word[0] = 0; \
	(bp)->blk_dva[2].dva_word[1] = 0; \
	(bp)->blk_prop = 0; \
	(bp)->blk_pad[0] = 0; \
	(bp)->blk_pad[1] = 0; \
	(bp)->blk_phys_birth = 0; \
	(bp)->blk_birth = 0; \
	(bp)->blk_fill = 0; \
	ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \
	}

	#define BP_SPRINTF_LEN 320

	#endif /* ! ZFS_SPA_HEADER */