46 /*
  47  * DDT classes, in the desired search order (highest replication level first).
  48  */
  49 enum ddt_class {
  50         DDT_CLASS_DITTO = 0,
  51         DDT_CLASS_DUPLICATE,
  52         DDT_CLASS_UNIQUE,
  53         DDT_CLASSES
  54 };
  55 
  56 #define DDT_TYPE_CURRENT                0
  57 
  58 #define DDT_COMPRESS_BYTEORDER_MASK     0x80
  59 #define DDT_COMPRESS_FUNCTION_MASK      0x7f
  60 
  61 /*
  62  * On-disk ddt entry:  key (name) and physical storage (value).
  63  */
  64 typedef struct ddt_key {
  65         zio_cksum_t     ddk_cksum;      /* 256-bit block checksum */
  66         uint64_t        ddk_prop;       /* LSIZE, PSIZE, compression */
  67 } ddt_key_t;
  68 
  69 /*
  70  * ddk_prop layout:
  71  *
  72  *      +-------+-------+-------+-------+-------+-------+-------+-------+
  73  *      |   0   |   0   |   0   | comp  |     PSIZE     |     LSIZE     |
  74  *      +-------+-------+-------+-------+-------+-------+-------+-------+
  75  */



  76 #define DDK_GET_LSIZE(ddk)      \
  77         BF64_GET_SB((ddk)->ddk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)
  78 #define DDK_SET_LSIZE(ddk, x)   \
  79         BF64_SET_SB((ddk)->ddk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
  80 
  81 #define DDK_GET_PSIZE(ddk)      \
  82         BF64_GET_SB((ddk)->ddk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
  83 #define DDK_SET_PSIZE(ddk, x)   \
  84         BF64_SET_SB((ddk)->ddk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
  85 
  86 #define DDK_GET_COMPRESS(ddk)           BF64_GET((ddk)->ddk_prop, 32, 8)
  87 #define DDK_SET_COMPRESS(ddk, x)        BF64_SET((ddk)->ddk_prop, 32, 8, x)
  88 
  89 #define DDT_KEY_WORDS   (sizeof (ddt_key_t) / sizeof (uint64_t))
  90 
  91 typedef struct ddt_phys {
  92         dva_t           ddp_dva[SPA_DVAS_PER_BP];
  93         uint64_t        ddp_refcnt;
  94         uint64_t        ddp_phys_birth;
  95 } ddt_phys_t;

  46 /*
  47  * DDT classes, in the desired search order (highest replication level first).
  48  */
  49 enum ddt_class {
  50         DDT_CLASS_DITTO = 0,
  51         DDT_CLASS_DUPLICATE,
  52         DDT_CLASS_UNIQUE,
  53         DDT_CLASSES
  54 };
  55 
  56 #define DDT_TYPE_CURRENT                0
  57 
  58 #define DDT_COMPRESS_BYTEORDER_MASK     0x80
  59 #define DDT_COMPRESS_FUNCTION_MASK      0x7f
  60 
  61 /*
  62  * On-disk ddt entry:  key (name) and physical storage (value).
  63  */
  64 typedef struct ddt_key {
  65         zio_cksum_t     ddk_cksum;      /* 256-bit block checksum */
  66         /*
  67          * Encoded with logical & physical size, and compression, as follows:




  68          *   +-------+-------+-------+-------+-------+-------+-------+-------+
  69          *   |   0   |   0   |   0   | comp  |     PSIZE     |     LSIZE     |
  70          *   +-------+-------+-------+-------+-------+-------+-------+-------+
  71          */
  72         uint64_t        ddk_prop;
  73 } ddt_key_t;
  74 
  75 #define DDK_GET_LSIZE(ddk)      \
  76         BF64_GET_SB((ddk)->ddk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1)
  77 #define DDK_SET_LSIZE(ddk, x)   \
  78         BF64_SET_SB((ddk)->ddk_prop, 0, 16, SPA_MINBLOCKSHIFT, 1, x)
  79 
  80 #define DDK_GET_PSIZE(ddk)      \
  81         BF64_GET_SB((ddk)->ddk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1)
  82 #define DDK_SET_PSIZE(ddk, x)   \
  83         BF64_SET_SB((ddk)->ddk_prop, 16, 16, SPA_MINBLOCKSHIFT, 1, x)
  84 
  85 #define DDK_GET_COMPRESS(ddk)           BF64_GET((ddk)->ddk_prop, 32, 8)
  86 #define DDK_SET_COMPRESS(ddk, x)        BF64_SET((ddk)->ddk_prop, 32, 8, x)
  87 
  88 #define DDT_KEY_WORDS   (sizeof (ddt_key_t) / sizeof (uint64_t))
  89 
  90 typedef struct ddt_phys {
  91         dva_t           ddp_dva[SPA_DVAS_PER_BP];
  92         uint64_t        ddp_refcnt;
  93         uint64_t        ddp_phys_birth;
  94 } ddt_phys_t;