thin-provisioning-tools/functional-tests/check-superblock.scm

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(import
(binary-format)
(block-io)
(btree)
(fmt fmt)
(matchable)
(mapping-tree)
(rnrs))
;;;;---------------------------------------------------
;;;; Constants
;;;;---------------------------------------------------
;; FIXME: duplicate with main.scm
(define (current-metadata) "./metadata.bin")
(define $superblock-magic 27022010)
(define $superblock-salt 160774)
(define $uuid-size 16)
(define $space-map-root-size 128)
(binary-format superblock
(csum le32)
(flags le32)
(block-nr le64)
(uuid (bytes $uuid-size))
(magic le64)
(version le32)
(time le32)
(trans-id le64)
(metadata-snap le64)
(data-space-map-root (bytes $space-map-root-size))
(metadata-space-map-root (bytes $space-map-root-size))
(data-mapping-root le64)
(device-details-root le64)
(data-block-size le32)
(metadata-block-size le32)
(metadata-nr-blocks le64)
(compat-flags le32)
(compat-ro-flags le32)
(incompat-flags le32))
;;;;---------------------------------------------------
;;;; Top level
;;;;---------------------------------------------------
(define (check-magic sb)
((let ((m (bytevector-u32-ref sb 32 (endianness little))))
(fmt #t (dsp "on disk magic: ") (num m) nl)
)))
(define (read-superblock)
(with-metadata (md (current-metadata))
(superblock-unpack (read-block md 0) 0)))
(define (dump-dev-tree)
(with-metadata (md (current-metadata))
(let ((sb (superblock-unpack (read-block md 0) 0)))
(btree-each (btree-open le64-type md (superblock-data-mapping-root sb))
(lambda (k v)
(fmt #t (dsp "dev-id: ") (num k)
(dsp ", mapping root: ") (num v) nl))))))
(define (dump-mappings root)
(with-metadata (md (current-metadata))
(btree-each (btree-open le64-type md root)
(lambda (k v)
(fmt #t (dsp "vblock: ") (num k)
(dsp ", pblock: ") (num v) nl)))))
(define (dump-all-mappings)
(with-metadata (md (current-metadata))
(let ((sb (superblock-unpack (read-block md 0) 0)))
(let ((mappings (mapping-tree-open md (superblock-data-mapping-root sb))))
(mapping-tree-each mappings
(lambda (dev-id vblock pblock)
(fmt #t
(dsp "thin dev ") (num dev-id)
(dsp ", vblock ") (num vblock)
(dsp ", pblock ") (num pblock)
nl)))))))
(define (check-superblock)
(with-metadata (md (current-metadata))
(let ((superblock (read-block md 0)))
(fmt #t (dsp "checksum on disk: ") (dsp (bytevector-u32-ref superblock 0 (endianness little))) nl)
;(fmt #t (dsp "calculated checksum: ") (dsp (crc32-region $superblock-salt superblock 4 4092)) nl)
(check-magic superblock))))