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[functional-tests] change btree to use the bcache

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This commit is contained in:
Joe Thornber
2017-09-08 15:51:33 +01:00
parent 3b7320cd84
commit 40b257d42e
5 changed files with 186 additions and 208 deletions
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42
functional-tests/thin/mapping-tree.scm Normal file
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@@ -0,0 +1,42 @@
(library
(mapping-tree)
(export mapping-tree-open
mapping-tree-lookup
mapping-tree-each)
(import (btree)
(chezscheme)
(srfi s8 receive))
(define-record-type mapping-tree (fields dev-tree))
(define (mapping-tree-open dev root)
(make-mapping-tree (btree-open le64-vt dev root)))
;; (values <block> <time>)
(define time-mask (- (fxsll 1 24) 1))
(define (unpack-block-time bt)
(values (fxsrl bt 24) (fxlogand bt time-mask)))
;; FIXME: unpack the block time
(define (mapping-tree-lookup mtree dev-id vblock default)
(let* ((unique (gensym))
(dev-tree (mapping-tree-dev-tree mtree))
(root2 (btree-lookup dev-tree dev-id unique)))
(if (eq? unique root2)
default
(btree-lookup (btree-open le64-vt (btree-bcache dev-tree) root2) vblock default))))
;;; Visits every entry in the mapping tree calling (fn dev-id vblock pblock time).
(define (mapping-tree-each mtree fn)
(let ((dev-tree (mapping-tree-dev-tree mtree)))
(define (visit-dev dev-id mapping-root)
(btree-each (btree-open le64-vt (btree-bcache dev-tree) mapping-root)
(lambda (vblock mapping)
(receive (block time) (unpack-block-time mapping)
(fn dev-id vblock block time)))))
(btree-each dev-tree visit-dev))))

91
functional-tests/thin/thin_check Normal file
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(import
(bcache block-manager)
(btree)
(fmt fmt)
(matchable)
(mapping-tree)
(chezscheme))
;;;;---------------------------------------------------
;;;; 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)
(define-ftype Superblock
(packed
(endian little
(struct
(csum unsigned-32)
(flags unsigned-32)
(block-nr unsigned-64)
(uuid (bytes $uuid-size))
(magic unsigned-32)
(version unsigned-32)
(time unsigned-32)
(trans-id unsigned-64)
(metadata-snap unsigned-64)
(data-space-map-root (bytes $space-map-root-size))
(metadata-space-map-root (bytes $space-map-root-size))
(data-mapping-root unsigned-64)
(device-details-root unsigned-64)
(data-block-size unsigned-32)
(metadata-block-size unsigned-32)
(metadata-nr-blocks unsigned-64)
(compat-flags unsigned-32)
(compat-ro-flags unsigned-32)
(incompat-flags unsigned-32)))))
;;;;---------------------------------------------------
;;;; 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 time)
(fmt #t
(dsp "thin dev ") (num dev-id)
(dsp ", vblock ") (num vblock)
(dsp ", pblock ") (num pblock)
(dsp ", time ") (num time)
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))))