90 lines
3.2 KiB
Scheme
90 lines
3.2 KiB
Scheme
(import
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(binary-format)
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(block-io)
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(btree)
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(fmt fmt)
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(matchable)
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(mapping-tree)
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(rnrs))
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;;;;---------------------------------------------------
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;;;; Constants
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;;;;---------------------------------------------------
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;; FIXME: duplicate with main.scm
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(define (current-metadata) "./metadata.bin")
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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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(binary-format superblock
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(csum le32)
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(flags le32)
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(block-nr le64)
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(uuid (bytes $uuid-size))
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(magic le64)
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(version le32)
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(time le32)
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(trans-id le64)
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(metadata-snap le64)
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(data-space-map-root (bytes $space-map-root-size))
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(metadata-space-map-root (bytes $space-map-root-size))
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(data-mapping-root le64)
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(device-details-root le64)
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(data-block-size le32)
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(metadata-block-size le32)
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(metadata-nr-blocks le64)
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(compat-flags le32)
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(compat-ro-flags le32)
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(incompat-flags le32))
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;;;;---------------------------------------------------
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;;;; Top level
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;;;;---------------------------------------------------
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(define (check-magic sb)
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((let ((m (bytevector-u32-ref sb 32 (endianness little))))
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(fmt #t (dsp "on disk magic: ") (num m) nl)
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)))
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(define (read-superblock)
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(with-metadata (md (current-metadata))
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(superblock-unpack (read-block md 0) 0)))
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(define (dump-dev-tree)
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(with-metadata (md (current-metadata))
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(let ((sb (superblock-unpack (read-block md 0) 0)))
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(btree-each (btree-open le64-type md (superblock-data-mapping-root sb))
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(lambda (k v)
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(fmt #t (dsp "dev-id: ") (num k)
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(dsp ", mapping root: ") (num v) nl))))))
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(define (dump-mappings root)
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(with-metadata (md (current-metadata))
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(btree-each (btree-open le64-type md root)
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(lambda (k v)
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(fmt #t (dsp "vblock: ") (num k)
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(dsp ", pblock: ") (num v) nl)))))
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(define (dump-all-mappings)
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(with-metadata (md (current-metadata))
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(let ((sb (superblock-unpack (read-block md 0) 0)))
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(let ((mappings (mapping-tree-open md (superblock-data-mapping-root sb))))
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(mapping-tree-each mappings
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(lambda (dev-id vblock pblock time)
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(fmt #t
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(dsp "thin dev ") (num dev-id)
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(dsp ", vblock ") (num vblock)
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(dsp ", pblock ") (num pblock)
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(dsp ", time ") (num time)
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nl)))))))
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(define (check-superblock)
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(with-metadata (md (current-metadata))
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(let ((superblock (read-block md 0)))
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(fmt #t (dsp "checksum on disk: ") (dsp (bytevector-u32-ref superblock 0 (endianness little))) nl)
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;(fmt #t (dsp "calculated checksum: ") (dsp (crc32-region $superblock-salt superblock 4 4092)) nl)
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(check-magic superblock))))
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