diff options
Diffstat (limited to 'tools/libfsimage/zfs/zfs-include/spa.h')
| -rw-r--r-- | tools/libfsimage/zfs/zfs-include/spa.h | 93 |
1 files changed, 62 insertions, 31 deletions
diff --git a/tools/libfsimage/zfs/zfs-include/spa.h b/tools/libfsimage/zfs/zfs-include/spa.h index f6f2f15e55..4c943310dc 100644 --- a/tools/libfsimage/zfs/zfs-include/spa.h +++ b/tools/libfsimage/zfs/zfs-include/spa.h @@ -17,7 +17,7 @@ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ /* - * Copyright 2007 Sun Microsystems, Inc. All rights reserved. + * Copyright 2010 Sun Microsystems, Inc. All rights reserved. * Use is subject to license terms. */ @@ -63,6 +63,11 @@ #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 @@ -106,15 +111,15 @@ typedef struct zio_cksum { * +-------+-------+-------+-------+-------+-------+-------+-------+ * 5 |G| offset3 | * +-------+-------+-------+-------+-------+-------+-------+-------+ - * 6 |E| lvl | type | cksum | comp | PSIZE | LSIZE | + * 6 |BDX|lvl| type | cksum | comp | PSIZE | LSIZE | * +-------+-------+-------+-------+-------+-------+-------+-------+ * 7 | padding | * +-------+-------+-------+-------+-------+-------+-------+-------+ * 8 | padding | * +-------+-------+-------+-------+-------+-------+-------+-------+ - * 9 | padding | + * 9 | physical birth txg | * +-------+-------+-------+-------+-------+-------+-------+-------+ - * a | birth txg | + * a | logical birth txg | * +-------+-------+-------+-------+-------+-------+-------+-------+ * b | fill count | * +-------+-------+-------+-------+-------+-------+-------+-------+ @@ -138,25 +143,29 @@ typedef struct zio_cksum { * cksum checksum function * comp compression function * G gang block indicator - * E endianness - * type DMU object type + * B byteorder (endianness) + * D dedup + * X unused * lvl level of indirection - * birth txg transaction group in which the block was born + * 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 */ -typedef struct blkptr { - dva_t blk_dva[3]; /* 128-bit Data Virtual Address */ - uint64_t blk_prop; /* size, compression, type, etc */ - uint64_t blk_pad[3]; /* Extra space for the future */ - uint64_t blk_birth; /* transaction group at birth */ - uint64_t blk_fill; /* fill count */ - zio_cksum_t blk_cksum; /* 256-bit checksum */ -} blkptr_t; - #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. */ @@ -180,8 +189,7 @@ typedef struct blkptr { #define DVA_SET_GANG(dva, x) BF64_SET((dva)->dva_word[1], 63, 1, x) #define BP_GET_LSIZE(bp) \ - (BP_IS_HOLE(bp) ? 0 : \ - BF64_GET_SB((bp)->blk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)) + 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) @@ -190,20 +198,35 @@ typedef struct blkptr { #define BP_SET_PSIZE(bp, x) \ BF64_SET_SB((bp)->blk_prop, 16, 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_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_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_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_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_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_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_PHYSICAL_BIRTH(bp) \ + ((bp)->blk_phys_birth ? (bp)->blk_phys_birth : (bp)->blk_birth) -#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_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]) + \ @@ -227,13 +250,18 @@ typedef struct blkptr { ((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) \ @@ -247,7 +275,10 @@ typedef struct blkptr { #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) -#define BP_IS_OLDER(bp, txg) (!BP_IS_HOLE(bp) && (bp)->blk_birth < (txg)) + +/* 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) \ { \ @@ -260,7 +291,7 @@ typedef struct blkptr { (bp)->blk_prop = 0; \ (bp)->blk_pad[0] = 0; \ (bp)->blk_pad[1] = 0; \ - (bp)->blk_pad[2] = 0; \ + (bp)->blk_phys_birth = 0; \ (bp)->blk_birth = 0; \ (bp)->blk_fill = 0; \ ZIO_SET_CHECKSUM(&(bp)->blk_cksum, 0, 0, 0, 0); \ |