2017-09-14 16:17:23 +05:30
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(library
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(thin metadata)
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(export ThinSuperblock
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ThinDeviceDetails)
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2017-09-14 20:39:43 +05:30
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(import (chezscheme)
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(bcache block-manager)
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(persistent-data btree))
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2017-09-14 16:17:23 +05:30
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(define $superblock-magic 27022010)
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(define $superblock-salt 160774)
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(define $uuid-size 16)
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(define $space-map-root-size 128)
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(define-compound-value-type device-details-vt ThinDeviceDetails)
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(define (block->superblock b)
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(make-ftype-pointer ThinSuperblock (block-data b)))
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(define-ftype ThinSuperblock
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(packed
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(endian little
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(struct
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(csum unsigned-32)
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(flags unsigned-32)
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(block-nr unsigned-64)
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(uuid (array 16 unsigned-8))
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(magic unsigned-64)
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(version unsigned-32)
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(time unsigned-32)
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(trans-id unsigned-64)
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(metadata-snap unsigned-64)
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(data-space-map-root (array 128 unsigned-8))
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(metadata-space-map-root (array 128 unsigned-8))
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(data-mapping-root unsigned-64)
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(device-details-root unsigned-64)
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(data-block-size unsigned-32)
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(metadata-block-size unsigned-32)
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(metadata-nr-blocks unsigned-64)
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(compat-flags unsigned-32)
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(compat-ro-flags unsigned-32)
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(incompat-flags unsigned-32)))))
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(define-ftype ThinDeviceDetails
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(packed
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(endian little
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(struct
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(mapped-blocks unsigned-64)
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(transaction-id unsigned-64)
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(creation-time unsigned-32)
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(snapshotted-time unsigned-32)))))
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)
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