thin-provisioning-tools/functional-tests/device-mapper/dm-tests.scm

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(library
(device-mapper dm-tests)
(export register-dm-tests
get-dev-size)
(import (device-mapper ioctl)
(disk-units)
(chezscheme)
(functional-tests)
(fmt fmt)
(list-utils)
(loops)
(prefix (parser-combinators) p:)
(process)
(srfi s27 random-bits)
(temp-file)
(utils))
;; We have to export something that forces all the initialisation expressions
;; to run.
(define (register-dm-tests) #t)
;; FIXME: use memoisation to avoid running blockdev so much
;; FIXME: return a disk-size, and take a dm-device
(define (get-dev-size dev)
(run-ok-rcv (stdout stderr) (fmt #f "blockdev --getsz " dev)
(string->number (chomp stdout))))
;; Hard coded, get these from the command line
(define fast-dev "/dev/vda")
(define mk-fast-allocator
(let ((size (get-dev-size fast-dev)))
(lambda ()
(make-allocator fast-dev size))))
(define slow-dev "/dev/vdb")
(define mk-slow-allocator
(let ((size (get-dev-size slow-dev)))
(lambda ()
(make-allocator slow-dev size))))
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(define-record-type segment (fields (mutable dev)
(mutable start)
(mutable end)))
(define (linear seg)
(make-target (- (segment-end seg) (segment-start seg))
"linear"
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(fmt #f (segment-dev seg) " " (segment-start seg))))
;; FIXME: move above first use
(define (make-allocator dev dev-len)
(let ((offset 0))
(lambda (len)
(let ((b offset)
(e (+ offset (to-sectors len))))
(if (> e dev-len)
(fail "not enough space for allocation")
(begin
(set! offset e)
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(linear (make-segment dev b e))))))))
(define (linear-table allocator nr-targets)
(let loop ((nr-targets nr-targets)
(acc '()))
(if (zero? nr-targets)
(reverse acc)
(loop (- nr-targets 1)
(cons (allocator (sectors (* 8 (random-integer 1024))))
acc)))))
(define (similar-targets t1 t2)
(and (equal? (target-type t1)
(target-type t2))
(equal? (target-len t1)
(target-len t2))))
(define-syntax define-dm-scenario
(syntax-rules ()
((_ path desc b1 b2 ...)
(define-scenario path desc
(with-dm b1 b2 ...)))))
;;----------------
;; Thin utilities
;;----------------
(define-enumeration thin-pool-option
(skip-block-zeroing ignore-discard no-discard-passdown read-only error-if-no-space)
thin-pool-options)
;; Expands the above option set into a list of strings to be passed to the
;; target.
(define (expand-thin-options opts)
(define (expand-opt o)
(case o
((skip-block-zeroing) "skip_block_zeroing")
((ignore-discard) "ignore_discard")
((no-discard-passdown) "no_discard_passdown")
((read-only) "read_only")
((error-if-no-space) "error_if_no_space")))
(map expand-opt (enum-set->list opts)))
;; Builds a string of space separated args
(define (build-args-string . args)
(fmt #f (fmt-join dsp args (dsp " "))))
(define (pool-table md-dev data-dev block-size opts)
(let ((opts-str (expand-thin-options opts))
(data-size (sectors (get-dev-size (dm-device-path data-dev)))))
(list
(make-target (to-sectors data-size) "thin-pool"
(apply build-args-string
(dm-device-path md-dev)
(dm-device-path data-dev)
(to-sectors block-size)
80 ;; low water mark
(length opts-str) opts-str)))))
(define (dd-cmd . args)
(build-command-line (cons "dd" args)))
;; FIXME: move somewhere else, and do IO in bigger blocks
(define zero-dev
(case-lambda
((dev)
(zero-dev dev
(sectors
(get-dev-size
(dm-device-path dev)))))
((dev size)
(run-ok (dd-cmd "if=/dev/zero"
(string-append "of=" (dm-device-path dev))
"bs=512" (fmt #f "count=" (to-sectors size)))))))
;; The contents should be
(define (with-ini-file-fn section contents fn)
(define (expand-elt pair)
(cat (car pair) "=" (cadr pair) nl))
(let ((expanded-contents
(fmt #f
(cat "[" section "]" nl)
(apply-cat (map expand-elt contents)))))
(with-temp-file-containing ((v "fio" expanded-contents))
(fn v))))
(define-syntax with-ini-file
(syntax-rules ()
((_ (tmp section contents) b1 b2 ...)
(with-ini-file-fn section contents (lambda (tmp) b1 b2 ...)))))
(define (rand-write-and-verify dev)
(with-ini-file (fio-input "write-and-verify"
`(("rw" "randwrite")
("bs" "4k")
("direct" 1)
("ioengine" "libaio")
("iodepth" 16)
("verify" "crc32c")
("filename" ,(dm-device-path dev))))
(run-ok (fmt #f "fio " fio-input))))
(define generate-dev-name
(let ((nr 0))
(lambda ()
(let ((name (fmt #f "test-dev-" nr)))
(set! nr (+ nr 1))
name))))
(define (with-pool-fn md-table data-table block-size fn)
(with-devices ((md (generate-dev-name) "" md-table)
(data (generate-dev-name) "" data-table))
(zero-dev md (kilo 4))
(let ((ptable (pool-table md data block-size (thin-pool-options))))
(with-device (pool (generate-dev-name) "" ptable)
(fn pool)))))
(define-syntax with-pool
(syntax-rules ()
((_ (pool md-table data-table block-size) b1 b2 ...)
(with-pool-fn md-table
data-table
block-size
(lambda (pool) b1 b2 ...)))))
(define-syntax with-default-pool
(syntax-rules ()
((_ (pool) b1 b2 ...)
(with-pool (pool (default-md-table)
(default-data-table (gig 10))
(kilo 64))
b1 b2 ...))))
(define (default-md-table)
(list ((mk-fast-allocator) (meg 32))))
(define (default-data-table size)
(list ((mk-slow-allocator) size)))
(define-syntax define-thin-scenario
(syntax-rules ()
((_ path (pool size) desc b1 b2 ...)
(define-dm-scenario path desc
(with-pool-fn (list ((mk-fast-allocator) (meg 32)))
(list ((mk-slow-allocator) size))
(kilo 64)
(lambda (pool) b1 b2 ...))))))
(define (thin-table pool id size)
(list
(make-target (to-sectors size) "thin" (build-args-string (dm-device-path pool) id))))
(define (create-thin pool id)
(message pool 0 (fmt #f "create_thin " id)))
(define (create-snap pool new-id origin-id)
(message pool 0 (fmt #f "create_snap " new-id " " origin-id)))
(define (delete-thin pool id)
(message pool 0 (fmt #f "delete " id)))
(define (with-thin-fn pool id size fn)
(with-device-fn (generate-dev-name) "" (thin-table pool id size) fn))
(define (with-new-thin-fn pool id size fn)
(create-thin pool id)
(with-thin-fn pool id size fn))
(define-syntax with-thin
(syntax-rules ()
((_ (thin pool id size) b1 b2 ...)
(with-thin-fn pool id size (lambda (thin) b1 b2 ...)))))
(define-syntax with-new-thin
(syntax-rules ()
((_ (thin pool id size) b1 b2 ...)
(with-new-thin-fn pool id size (lambda (thin)
b1 b2 ...)))))
;;;-----------------------------------------------------------
;;; Pool status
;;;-----------------------------------------------------------
(define-record-type pool-status
(fields (mutable transaction-id)
(mutable used-metadata)
(mutable total-metadata)
(mutable used-data)
(mutable total-data)
(mutable held-root) ; (bool . root?)
(mutable needs-check) ; bool
(mutable discard) ; bool
(mutable discard-passdown) ; bool
(mutable block-zeroing) ; bool
(mutable io-mode) ; 'out-of-data-space, 'ro, 'rw
(mutable no-space-behaviour) ; 'error, 'queue
(mutable fail) ; bool
))
(define (default-pool-status)
(make-pool-status 0 ; trans id
0 ; used md
0 ; total md
0 ; used data
0 ; total data
(cons #f 0) ; held root
#f ; need check
#t ; discard
#t ; discard passdown
#t ; block zeroing
'rw ; io-mode
'queue ; no space behaviour
#f ; fail
))
(define digit (p:charset "0123456789"))
(define number
(p:lift (lambda (cs)
(string->number
(apply string cs)))
(p:many+ digit)))
(define held-root
(p:alt
(p:>> (p:lit "-")
(p:pure (cons #f 0)))
(p:parse-m (p:<- root number)
(p:pure (cons #t root)))))
(define space
(p:many+ (p:charset " \t")))
(define slash
(p:lit "/"))
;; The options parser returns a function that mutates the status.
(define-syntax opt-mut
(syntax-rules ()
((_ (status txt) b1 b2 ...)
(p:>> (p:lit txt)
(p:pure (lambda (status) b1 b2 ...))))))
(define pool-option
(p:one-of
(opt-mut (status "skip_block_zeroing")
(pool-status-block-zeroing-set! status #f))
(opt-mut (status "ignore_discard")
(pool-status-discard-set! status #f))
(opt-mut (status "no_discard_passdown")
(pool-status-discard-passdown-set! status #f))
(opt-mut (status "discard_passdown")
(pool-status-discard-passdown-set! status #t))
(opt-mut (status "out_of_data_space")
(pool-status-io-mode-set! status 'out-of-data-space))
(opt-mut (status "ro")
(pool-status-io-mode-set! status 'ro))
(opt-mut (status "rw")
(pool-status-io-mode-set! status 'rw))
(opt-mut (status "error_if_no_space")
(pool-status-no-space-behaviour-set! status 'error))
(opt-mut (status "queue_if_no_space")
(pool-status-no-space-behaviour-set! status 'queue))))
(define needs-check
(p:one-of
(p:>> (p:lit "needs_check")
(p:pure #t))
(p:pure #f)))
(define (parse-pool-status txt)
(p:parse-m (p:<- transaction-id number)
space
(p:<- used-metadata number)
slash
(p:<- total-metadata number)
space
(p:<- used-data number)
slash
(p:<- total-data number)
space
(p:<- metadata-snap held-root)
space
(p:<- options (p:many* (p:<* pool-option space)))
(p:<- check needs-check)
(let ((status (default-pool-status)))
(pool-status-transaction-id-set! status transaction-id)
(pool-status-used-metadata-set! status used-metadata)
(pool-status-total-metadata-set! status total-metadata)
(pool-status-used-data-set! status used-data)
(pool-status-total-data-set! status total-data)
(pool-status-held-root-set! status metadata-snap)
(pool-status-needs-check-set! status check)
(for-each (lambda (mut) (mut status)) options)
(p:pure status))))
(define (get-pool-status pool)
(p:parse-value parse-pool-status
(get-status pool)))
;;;-----------------------------------------------------------
;;; Fundamental dm scenarios
;;;-----------------------------------------------------------
(define-scenario (dm create-interface)
"create and destroy an ioctl interface object"
(with-dm #t))
(define-scenario (dm create-device)
"create and destroy a device"
(with-dm
(with-empty-device (dev "foo" "uuidd")
#t)))
(define-scenario (dm duplicate-name-fails)
"You can't create two devices with the same name"
(with-dm
(with-empty-device (dev1 "foo" "uuid1")
(assert-raises
(with-empty-device (dev2 "foo" "uuid2") #t)))))
(define-scenario (dm duplicate-uuid-fails)
"You can't create two devices with the same uuid"
(with-dm
(with-empty-device (dev1 "foo" "uuid")
(assert-raises
(with-empty-device (dev2 "bar" "uuid") #t)))))
(define-scenario (dm load-single-target)
"You can load a single target table"
(with-dm
(with-empty-device (dev "foo" "uuid")
;; FIXME: export contructor for linear targets
(load-table dev (list (linear (make-segment fast-dev 0 102400)))))))
(define-dm-scenario (dm load-many-targets)
"You can load a large target table"
(with-empty-device (dev "foo" "uuid")
(load-table dev (linear-table (mk-fast-allocator) 32))))
(define-dm-scenario (dm resume-works)
"You can resume a new target with a table"
(with-empty-device (dev "foo" "uuid")
(load-table dev (linear-table (mk-fast-allocator) 8))
(resume-device dev)))
(define-dm-scenario (dm suspend-resume-cycle)
"You can pause a device."
(with-device (dev "foo" "uuid" (linear-table (mk-fast-allocator) 8))
(suspend-device dev)
(resume-device dev)))
(define-dm-scenario (dm reload-table)
"You can reload a table"
(let ((pv (mk-fast-allocator)))
(with-device (dev "foo" "uuid" (linear-table pv 16))
(pause-device dev
(load-table dev (linear-table pv 8))))))
(define-dm-scenario (dm list-devices)
"list-devices works"
(let ((pv (mk-fast-allocator)))
(with-devices ((dev1 "foo" "uuid" (linear-table pv 4))
(dev2 "bar" "uuid2" (linear-table pv 4)))
(let ((names (map dm-device-name (list-devices))))
(assert-member? "foo" names)
(assert-member? "bar" names)))))
(define-dm-scenario (dm get-status)
"get-status works"
(let ((table (linear-table (mk-fast-allocator) 4)))
(with-device (dev "foo" "uuid" table)
(let ((status (get-status dev)))
(assert-every similar-targets table status)))))
(define-dm-scenario (dm get-table)
"get-table works"
(let ((table (linear-table (mk-fast-allocator) 4)))
(with-device (dev "foo" "uuid" table)
(let ((table-out (get-table dev)))
(assert-every similar-targets table table-out)))))
;;;-----------------------------------------------------------
;;; Thin scenarios
;;;-----------------------------------------------------------
(define-thin-scenario (thin create-pool) (pool (gig 10))
"create a pool"
#t)
(define-thin-scenario (thin create-thin) (pool (gig 10))
"create a thin volume larger than the pool"
(with-new-thin (thin pool 0 (gig 100))
#t))
(define-thin-scenario (thin zero-thin) (pool (gig 10))
"zero a 1 gig thin device"
(let ((thin-size (gig 1)))
(with-new-thin (thin pool 0 thin-size)
(zero-dev thin thin-size))))
;;;-----------------------------------------------------------
;;; Thin creation scenarios
;;;-----------------------------------------------------------
(define-thin-scenario (thin create lots-of-thins) (pool (gig 10))
"create lots of empty thin volumes"
(upto (n 1000) (create-thin pool n)))
(define-thin-scenario (thin create lots-of-snaps) (pool (gig 10))
"create lots of snapshots of a single volume"
(create-thin pool 0)
(upto (n 999)
(create-snap pool (+ n 1) 0)))
(define-thin-scenario (thin create lots-of-recursive-snaps) (pool (gig 10))
"create lots of recursive snapshots"
(create-thin pool 0)
(upto (n 999)
(create-snap pool (+ n 1) n)))
(define-thin-scenario (thin create activate-thin-while-pool-suspended-fails) (pool (gig 10))
"you can't activate a thin device while the pool is suspended"
(create-thin pool 0)
(pause-device pool
(assert-raises
(with-thin (thin pool 0 (gig 1))
(fail "activate shouldn't work")))))
(define-dm-scenario (thin create huge-block-size)
"huge block sizes are possible"
(let ((size (sectors 524288)))
(with-pool (pool (default-md-table)
(default-data-table size)
(kilo 64))
(with-new-thin (thin pool 0 size)
(rand-write-and-verify thin)))))
;; FIXME: I thought we supported this?
(define-dm-scenario (thin create non-power-2-block-size-fails)
"The block size must be a power of 2"
(assert-raises
(with-pool (pool (default-md-table)
(default-data-table (gig 10))
(kilo 57))
#t)))
(define-dm-scenario (thin create tiny-block-size-fails)
"The block size must be at least 64k"
(assert-raises
(with-pool (pool (default-md-table)
(default-data-table (gig 10))
(kilo 32))
#t)))
(define-dm-scenario (thin create too-large-block-size-fails)
"The block size must be less than 2^21 sectors"
(assert-raises
(with-pool (pool (default-md-table)
(default-data-table (gig 10))
(sectors (expt 2 22)))
#t)))
(define-dm-scenario (thin create largest-block-size-succeeds)
"The block size 2^21 sectors should work"
(with-pool (pool (default-md-table)
(default-data-table (gig 10))
(sectors (expt 2 21)))
#t))
(define-dm-scenario (thin create too-large-thin-dev-fails)
"The thin-id must be less 2^24"
(with-default-pool (pool)
(assert-raises
(create-thin pool (expt 2 24)))))
(define-dm-scenario (thin create largest-thin-dev-succeeds)
"The thin-id must be less 2^24"
(with-default-pool (pool)
(create-thin pool (- (expt 2 24) 1))))
(define-dm-scenario (thin create too-small-metadata-fails)
"16k metadata is way too small"
(assert-raises
(with-pool (pool (list ((mk-fast-allocator) (kilo 16)))
(default-data-table (gig 10))
(kilo 64))
#t)))
;;;-----------------------------------------------------------
;;; Thin deletion scenarios
;;;-----------------------------------------------------------
(define-dm-scenario (thin delete create-delete-cycle)
"Create and delete a thin 1000 times"
(with-default-pool (pool)
(upto (n 1000)
(create-thin pool 0)
(delete-thin pool 0))))
(define-dm-scenario (thin delete create-delete-many)
"Create and delete 1000 thins"
(with-default-pool (pool)
(upto (n 1000)
(create-thin pool n))
(upto (n 1000)
(delete-thin pool n))))
(define-dm-scenario (thin delete rolling-create-delete)
"Create and delete 1000 thins"
(with-default-pool (pool)
(upto (n 1000)
(create-thin pool n))
(upto (n 1000)
(delete-thin pool n)
(create-thin pool n))))
(define-dm-scenario (thin delete unknown-id)
"Fails if the thin id is unknown"
(with-default-pool (pool)
(upto (n 100)
(create-thin pool (* n 100)))
(assert-raises
(delete-thin pool 57))))
(define-dm-scenario (thin delete active-device-fails)
"You can't delete an active device"
(with-default-pool (pool)
(with-new-thin (thin pool 0 (gig 1))
(assert-raises
(delete-thin pool 0)))))
#|
(define-dm-scenario (thin delete recover-space)
"Deleting a thin recovers data space"
(with-default-pool (pool)
(with-new-thin (thin pool 0 (gig 1))
;(zero-dev thin)
(fmt #t (get-pool-status pool)))))
|#
)