Merge branch 'master' of github.com:jthornber/thin-provisioning-tools

This commit is contained in:
Joe Thornber 2018-01-08 10:52:32 +00:00
commit 54c03f10e6
9 changed files with 753 additions and 99 deletions

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@ -151,6 +151,8 @@ file_utils::zero_superblock(std::string const &path)
memset(buffer, 0, SUPERBLOCK_SIZE); memset(buffer, 0, SUPERBLOCK_SIZE);
if (::write(fd, buffer, SUPERBLOCK_SIZE) != SUPERBLOCK_SIZE) if (::write(fd, buffer, SUPERBLOCK_SIZE) != SUPERBLOCK_SIZE)
throw runtime_error("couldn't zero superblock"); throw runtime_error("couldn't zero superblock");
::close(fd);
} }
//---------------------------------------------------------------- //----------------------------------------------------------------

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@ -1,4 +1,6 @@
#include <linux/dm-ioctl.h> #include <linux/dm-ioctl.h>
#include <linux/kdev_t.h>
#include <linux/fs.h>
#include <stdbool.h> #include <stdbool.h>
#include <stdint.h> #include <stdint.h>
#include <stdlib.h> #include <stdlib.h>
@ -239,7 +241,7 @@ static bool list_devices(struct dm_interface *dmi, struct dm_ioctl *ctl,
if (nl->dev) { if (nl->dev) {
for (;;) { for (;;) {
dlb_append(&dlb, major(nl->dev), minor(nl->dev), nl->name); dlb_append(&dlb, MAJOR(nl->dev), MINOR(nl->dev), nl->name);
if (!nl->next) if (!nl->next)
break; break;
@ -273,7 +275,9 @@ int dm_list_devices(struct dm_interface *dmi, struct dev_list **devs)
return r; return r;
} }
int dm_create_device(struct dm_interface *dmi, const char *name, const char *uuid) // Obviously major and minor are only valid if successful.
int dm_create_device(struct dm_interface *dmi, const char *name, const char *uuid,
uint32_t *major_result, uint32_t *minor_result)
{ {
int r; int r;
struct dm_ioctl *ctl = alloc_ctl(0); struct dm_ioctl *ctl = alloc_ctl(0);
@ -294,8 +298,11 @@ int dm_create_device(struct dm_interface *dmi, const char *name, const char *uui
} }
r = ioctl(dmi->fd, DM_DEV_CREATE, ctl); r = ioctl(dmi->fd, DM_DEV_CREATE, ctl);
if (!r) {
*major_result = MAJOR(ctl->dev);
*minor_result = MINOR(ctl->dev);
}
free_ctl(ctl); free_ctl(ctl);
return r; return r;
} }
@ -304,6 +311,9 @@ static int dev_cmd(struct dm_interface *dmi, const char *name, int request, unsi
int r; int r;
struct dm_ioctl *ctl = alloc_ctl(0); struct dm_ioctl *ctl = alloc_ctl(0);
if (!ctl)
return -ENOMEM;
ctl->flags = flags; ctl->flags = flags;
r = copy_name(ctl, name); r = copy_name(ctl, name);
if (r) { if (r) {
@ -400,8 +410,6 @@ static struct target *tb_get(struct target_builder *tb)
} }
//---------------------------------------------------------------- //----------------------------------------------------------------
// FIXME: provide some way of freeing a target list.
// FIXME: check the result from alloc_ctl is always being checked.
static size_t calc_load_payload(struct target *t) static size_t calc_load_payload(struct target *t)
{ {
@ -589,4 +597,18 @@ int dm_message(struct dm_interface *dmi, const char *name, uint64_t sector,
return r; return r;
} }
int get_dev_size(const char *path, uint64_t *sectors)
{
int r, fd;
fd = open(path, O_RDONLY);
if (fd < 0)
return -EINVAL;
r = ioctl(fd, BLKGETSIZE64, sectors);
(*sectors) /= 512;
close(fd);
return r;
}
//---------------------------------------------------------------- //----------------------------------------------------------------

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@ -25,7 +25,7 @@
(define-syntax with-valid-metadata (define-syntax with-valid-metadata
(syntax-rules () (syntax-rules ()
((_ (md) b1 b2 ...) ((_ (md) b1 b2 ...)
(with-temp-file-sized ((md "cache.bin" (meg 4))) (with-temp-file-sized ((md "cache.bin" (to-bytes (meg 4))))
(with-cache-xml (xml) (with-cache-xml (xml)
(run-ok (cache-restore "-i" xml "-o" md)) (run-ok (cache-restore "-i" xml "-o" md))
b1 b2 ...))))) b1 b2 ...)))))
@ -34,13 +34,13 @@
(define-syntax with-corrupt-metadata (define-syntax with-corrupt-metadata
(syntax-rules () (syntax-rules ()
((_ (md) b1 b2 ...) ((_ (md) b1 b2 ...)
(with-temp-file-sized ((md "cache.bin" (meg 4))) (with-temp-file-sized ((md "cache.bin" (to-bytes (meg 4))))
b1 b2 ...)))) b1 b2 ...))))
(define-syntax with-empty-metadata (define-syntax with-empty-metadata
(syntax-rules () (syntax-rules ()
((_ (md) b1 b2 ...) ((_ (md) b1 b2 ...)
(with-temp-file-sized ((md "cache.bin" (meg 4))) (with-temp-file-sized ((md "cache.bin" (to-bytes (meg 4))))
b1 b2 ...)))) b1 b2 ...))))
;; We have to export something that forces all the initialisation expressions ;; We have to export something that forces all the initialisation expressions
@ -315,7 +315,7 @@
(define-scenario (cache-metadata-size device-size-only) (define-scenario (cache-metadata-size device-size-only)
"Just --device-size causes fail" "Just --device-size causes fail"
(run-fail-rcv (_ stderr) (cache-metadata-size "--device-size" (meg 100)) (run-fail-rcv (_ stderr) (cache-metadata-size "--device-size" (to-bytes (meg 100)))
(assert-equal "If you specify --device-size you must also give --block-size." (assert-equal "If you specify --device-size you must also give --block-size."
stderr))) stderr)))

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@ -1,44 +1,58 @@
(library (library
(device-mapper dm-tests) (device-mapper dm-tests)
(export register-dm-tests make-allocator) (export register-dm-tests
get-dev-size)
(import (device-mapper ioctl) (import (device-mapper ioctl)
(disk-units)
(chezscheme) (chezscheme)
(functional-tests) (functional-tests)
(fmt fmt) (fmt fmt)
(list-utils) (list-utils)
(logging)
(loops)
(prefix (parser-combinators) p:)
(process) (process)
(srfi s27 random-bits) (srfi s27 random-bits)
(temp-file)) (temp-file)
(utils))
;; We have to export something that forces all the initialisation expressions ;; We have to export something that forces all the initialisation expressions
;; to run. ;; to run.
(define (register-dm-tests) #t) (define (register-dm-tests) #t)
;; Hard coded, get these from the command line ;; Hard coded, get these from the command line
(define test-dev "/dev/vda") (define fast-dev "/dev/vda")
(define test-dev-size 209715200) (define mk-fast-allocator
(let ((size (get-dev-size fast-dev)))
(lambda ()
(make-allocator fast-dev (to-sectors size)))))
(define (linear dev begin end) (define slow-dev "/dev/vdb")
(make-target (- end begin) (define mk-slow-allocator
(let ((size (get-dev-size slow-dev)))
(lambda ()
(make-allocator slow-dev (to-sectors size)))))
(define-record-type segment (fields (mutable dev)
(mutable start)
(mutable end)))
(define (linear seg)
(make-target (- (segment-end seg) (segment-start seg))
"linear" "linear"
(fmt #f dev " " begin))) (fmt #f (segment-dev seg) " " (segment-start seg))))
;; FIXME: move above first use
(define (make-allocator dev dev-len) (define (make-allocator dev dev-len)
(let ((offset 0)) (let ((offset 0))
(lambda (len) (lambda (len)
(let ((b offset) (let ((b offset)
(e (+ offset len))) (e (+ offset (to-sectors len))))
(if (> e dev-len) (if (> e dev-len)
(fail "not enough space for allocation") (fail "not enough space for allocation")
(begin (begin
(set! offset e) (set! offset e)
(linear dev b e))))))) (linear (make-segment dev b e))))))))
(define-syntax with-test-allocator
(syntax-rules ()
((_ (var) b1 b2 ...)
(let ((var (make-allocator test-dev test-dev-size)))
b1 b2 ...))))
(define (linear-table allocator nr-targets) (define (linear-table allocator nr-targets)
(let loop ((nr-targets nr-targets) (let loop ((nr-targets nr-targets)
@ -46,7 +60,7 @@
(if (zero? nr-targets) (if (zero? nr-targets)
(reverse acc) (reverse acc)
(loop (- nr-targets 1) (loop (- nr-targets 1)
(cons (allocator (* 8 (random-integer 1024))) (cons (allocator (sectors (* 8 (random-integer 1024))))
acc))))) acc)))))
(define (similar-targets t1 t2) (define (similar-targets t1 t2)
@ -57,14 +71,323 @@
(define-syntax define-dm-scenario (define-syntax define-dm-scenario
(syntax-rules () (syntax-rules ()
((_ path (pv) desc b1 b2 ...) ((_ path desc b1 b2 ...)
(define-scenario path desc (define-scenario path desc
(with-dm (with-dm b1 b2 ...)))))
(with-test-allocator (pv)
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 (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
(get-dev-size
(dm-device-path dev))))
((dev size)
(run-ok (dd-cmd "if=/dev/zero"
"oflag=direct"
(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 opts 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 opts)))
(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
(thin-pool-options)
(lambda (pool) b1 b2 ...)))
((_ (pool md-table data-table block-size opts) b1 b2 ...)
(with-pool-fn md-table
data-table
block-size
opts
(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
(case-lambda
(() (default-md-table (meg 32)))
((size) (list ((mk-fast-allocator) size)))))
(define default-data-table
(case-lambda
(() (default-data-table (gig 10)))
((size) (list ((mk-slow-allocator) size)))))
(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 ...)))))
;;;----------------------------------------------------------- ;;;-----------------------------------------------------------
;;; scenarios ;;; 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 (fmt-pool-status status)
(if (pool-status-fail status)
"pool failed"
(cat "transaction-id: " (pool-status-transaction-id status) ", "
(pool-status-used-metadata status) "/" (pool-status-total-metadata status) " metadata, "
(pool-status-used-data status) "/" (pool-status-total-data status) " data, "
(let ((hr (pool-status-held-root status)))
(if (car hr)
(cat "held root: " (cdr hr) ", ")
""))
(if (pool-status-needs-check status) "needs-check, " "")
(if (pool-status-discard status) "discard, " "")
(if (pool-status-discard-passdown status) "discard-passdown, " "")
(if (pool-status-block-zeroing status) "block-zero, " "")
"io-mode: " (pool-status-io-mode status) ", "
"no-space-behaviour: " (pool-status-no-space-behaviour status))))
(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
(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
(target-args (car (get-status pool)))))
;; FIXME: we could get the block size by querying the pool table
(define (assert-pool-used-data pool block-size expected-size)
(let ((status (get-pool-status pool)))
(assert-equal (pool-status-used-data status)
(/ (to-sectors expected-size)
(to-sectors block-size)))))
;;;-----------------------------------------------------------
;;; Fundamental dm scenarios
;;;----------------------------------------------------------- ;;;-----------------------------------------------------------
(define-scenario (dm create-interface) (define-scenario (dm create-interface)
"create and destroy an ioctl interface object" "create and destroy an ioctl interface object"
@ -95,50 +418,255 @@
(with-dm (with-dm
(with-empty-device (dev "foo" "uuid") (with-empty-device (dev "foo" "uuid")
;; FIXME: export contructor for linear targets ;; FIXME: export contructor for linear targets
(load-table dev (list (linear test-dev 0 102400)))))) (load-table dev (list (linear (make-segment fast-dev 0 102400)))))))
(define-dm-scenario (dm load-many-targets) (pv) (define-dm-scenario (dm load-many-targets)
"You can load a large target table" "You can load a large target table"
(with-empty-device (dev "foo" "uuid") (with-empty-device (dev "foo" "uuid")
(load-table dev (linear-table pv 32)))) (load-table dev (linear-table (mk-fast-allocator) 32))))
(define-dm-scenario (dm resume-works) (pv) (define-dm-scenario (dm resume-works)
"You can resume a new target with a table" "You can resume a new target with a table"
(with-empty-device (dev "foo" "uuid") (with-empty-device (dev "foo" "uuid")
(load-table dev (linear-table pv 8)) (load-table dev (linear-table (mk-fast-allocator) 8))
(resume-device dev))) (resume-device dev)))
(define-dm-scenario (dm suspend-resume-cycle) (pv) (define-dm-scenario (dm suspend-resume-cycle)
"You can pause a device." "You can pause a device."
(with-device (dev "foo" "uuid" (linear-table pv 8)) (with-device (dev "foo" "uuid" (linear-table (mk-fast-allocator) 8))
(suspend-device dev) (suspend-device dev)
(resume-device dev))) (resume-device dev)))
(define-dm-scenario (dm reload-table) (pv) (define-dm-scenario (dm reload-table)
"You can reload a table" "You can reload a table"
(with-device (dev "foo" "uuid" (linear-table pv 16)) (let ((pv (mk-fast-allocator)))
(pause-device dev (with-device (dev "foo" "uuid" (linear-table pv 16))
(load-table dev (linear-table pv 8))))) (pause-device dev
(load-table dev (linear-table pv 8))))))
(define-dm-scenario (dm list-devices) (pv) (define-dm-scenario (dm list-devices)
"list-devices works" "list-devices works"
(with-devices ((dev1 "foo" "uuid" (linear-table pv 4)) (let ((pv (mk-fast-allocator)))
(dev2 "bar" "uuid2" (linear-table pv 4))) (with-devices ((dev1 "foo" "uuid" (linear-table pv 4))
(let ((names (map device-details-name (list-devices)))) (dev2 "bar" "uuid2" (linear-table pv 4)))
(assert-member? "foo" names) (let ((names (map dm-device-name (list-devices))))
(assert-member? "bar" names)))) (assert-member? "foo" names)
(assert-member? "bar" names)))))
(define-dm-scenario (dm get-status) (pv) (define-dm-scenario (dm get-status)
"get-status works" "get-status works"
(let ((table (linear-table pv 4))) (let ((table (linear-table (mk-fast-allocator) 4)))
(with-device (dev "foo" "uuid" table) (with-device (dev "foo" "uuid" table)
(let ((status (get-status dev))) (let ((status (get-status dev)))
(assert-every similar-targets table status))))) (assert-every similar-targets table status)))))
(define-dm-scenario (dm get-table) (pv) (define-dm-scenario (dm get-table)
"get-table works" "get-table works"
(let ((table (linear-table pv 4))) (let ((table (linear-table (mk-fast-allocator) 4)))
(with-device (dev "foo" "uuid" table) (with-device (dev "foo" "uuid" table)
(let ((table-out (get-table dev))) (let ((table-out (get-table dev)))
(assert-every similar-targets table table-out))))) (assert-every similar-targets table table-out)))))
;;;-----------------------------------------------------------
;;; Thin scenarios
;;;-----------------------------------------------------------
;; FIXME: I think these 3 can go
(define-dm-scenario (thin misc create-pool)
"create a pool"
(with-default-pool (pool)
#t))
(define-dm-scenario (thin misc create-thin)
"create a thin volume larger than the pool"
(with-default-pool (pool)
(with-new-thin (thin pool 0 (gig 100))
#t)))
(define-dm-scenario (thin misc zero-thin)
"zero a 1 gig thin device"
(with-default-pool (pool)
(let ((thin-size (gig 1)))
(with-new-thin (thin pool 0 thin-size)
(zero-dev thin thin-size)))))
;;;-----------------------------------------------------------
;;; Thin creation scenarios
;;;-----------------------------------------------------------
(define-dm-scenario (thin create lots-of-thins)
"create lots of empty thin volumes"
(with-default-pool (pool)
(upto (n 1000) (create-thin pool n))))
(define-dm-scenario (thin create lots-of-snaps)
"create lots of snapshots of a single volume"
(with-default-pool (pool)
(create-thin pool 0)
(upto (n 999)
(create-snap pool (+ n 1) 0))))
(define-dm-scenario (thin create lots-of-recursive-snaps)
"create lots of recursive snapshots"
(with-default-pool (pool)
(create-thin pool 0)
(upto (n 999)
(create-snap pool (+ n 1) n))))
(define-dm-scenario (thin create activate-thin-while-pool-suspended-fails)
"you can't activate a thin device while the pool is suspended"
(with-default-pool (pool)
(create-thin pool 0)
(pause-device pool
(assert-raises
(with-thin (thin pool 0 (gig 1))
#t)))))
(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)))))
(define-dm-scenario (thin create bs-multiple-of-64k-good)
"The block size must be a multiple of 64k - good examples"
(for-each (lambda (bs)
(with-pool (pool (default-md-table)
(default-data-table (gig 10))
(kilo bs))
#t))
'(64 128 192 512 1024)))
(define-dm-scenario (thin create bs-multiple-of-64k-bad)
"The block size must be a multiple of 64k - bad examples"
(for-each (lambda (bs)
(assert-raises
(with-pool (pool (default-md-table)
(default-data-table (gig 10))
(kilo bs))
#t)))
'(65 96)))
(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)))
;; Chasing a bug in btree_split_beneath(). This triggers when a value
;; smaller than the rest of the tree is inserted and the
;; btree_split_beneath() path is taken. The newly inserted key will not be
;; present. Once another low key is inserted that doesn't take the split
;; beneath path the missing value reappears.
(define-dm-scenario (thin create devices-in-reverse-order)
"Keep adding a key that's lower than any in the tree."
(with-default-pool (pool)
(from-to (n 300 0 -1)
(create-thin pool n)
(with-thin (thin pool n (gig 1)) #t)))) ; activate to check it's there
;;;-----------------------------------------------------------
;;; 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"
(let ((thin-size (gig 1)))
(with-default-pool (pool)
(with-new-thin (thin pool 0 thin-size)
(assert-pool-used-data pool (kilo 64) (sectors 0))
(zero-dev thin))
(assert-pool-used-data pool (kilo 64) thin-size)
(delete-thin pool 0)
(assert-pool-used-data pool (kilo 64) (sectors 0)))))
(define-dm-scenario (thin delete after-no-space)
"You can delete after the pool has run out of data space"
(with-pool (pool (default-md-table)
(default-data-table (meg 128))
(kilo 64)
(thin-pool-options error-if-no-space skip-block-zeroing))
(with-new-thin (thin pool 0 (gig 1))
;;(assert-raises (zero-dev thin)))
(zero-dev thin))
(fmt #t (fmt-pool-status (get-pool-status pool)))
(assert-pool-used-data pool (kilo 64) (meg 128))
(delete-thin pool 0)
(assert-pool-used-data pool (kilo 64) (sectors 0))))
) )

View File

@ -6,6 +6,12 @@
with-dm-thunk with-dm-thunk
with-dm with-dm
dm-device
dm-device-name
dm-device-path
dm-device-minor
dm-device-major
dm-version dm-version
get-version get-version
remove-all remove-all
@ -21,7 +27,9 @@
load-table load-table
remove-device remove-device
with-empty-device-fn
with-empty-device with-empty-device
with-device-fn
with-device with-device
with-devices with-devices
suspend-device suspend-device
@ -31,16 +39,17 @@
pause-device pause-device
pause-device-thunk pause-device-thunk
device-details
device-details-name
device-details-major
device-details-minor
get-status get-status
get-table) get-table
message
get-dev-size)
(import (chezscheme) (import (chezscheme)
(disk-units)
(fmt fmt) (fmt fmt)
(logging)
(srfi s8 receive) (srfi s8 receive)
(utils)) (utils))
@ -56,7 +65,10 @@
(struct (struct
(fd int))) (fd int)))
(define-record-type dm-device (fields (mutable name))) (define-record-type dm-device (fields name major minor))
(define (dm-device-path d)
(fmt #f (dsp "/dev/dm-") (dsp (dm-device-minor d))))
(define open% (foreign-procedure "dm_open" () (* DMIoctlInterface))) (define open% (foreign-procedure "dm_open" () (* DMIoctlInterface)))
@ -89,6 +101,34 @@
(define-record-type dm-version (fields major minor patch)) (define-record-type dm-version (fields major minor patch))
(define (alloc-u32)
(make-ftype-pointer unsigned-32
(foreign-alloc (ftype-sizeof unsigned-32))))
(define (deref-u32 p)
(ftype-ref unsigned-32 () p))
(define (free-u32 p)
(foreign-free (ftype-pointer-address p)))
(define-syntax with-u32
(syntax-rules ()
((_ (v) b1 b2 ...)
(let ((v (alloc-u32)))
(dynamic-wind
(lambda () #f)
(lambda () b1 b2 ...)
(lambda () (free-u32 v)))))))
(define-syntax with-u32s
(syntax-rules ()
((_ (v) b1 b2 ...)
(with-u32 (v) b1 b2 ...))
((_ (v rest ...) b1 b2 ...)
(with-u32 (v)
(with-u32s (rest ...) b1 b2 ...)))))
(define (get-version) (define (get-version)
(define get (define get
(foreign-procedure "dm_version" ((* DMIoctlInterface) (foreign-procedure "dm_version" ((* DMIoctlInterface)
@ -96,24 +136,12 @@
(* unsigned-32) (* unsigned-32)
(* unsigned-32)) int)) (* unsigned-32)) int))
(define (alloc-u32) (with-u32s (major minor patch)
(make-ftype-pointer unsigned-32
(foreign-alloc (ftype-sizeof unsigned-32))))
(define (deref-u32 p)
(ftype-ref unsigned-32 () p))
(let ((major (alloc-u32))
(minor (alloc-u32))
(patch (alloc-u32)))
(if (zero? (get (current-dm-interface) major minor patch)) (if (zero? (get (current-dm-interface) major minor patch))
(let ((r (make-dm-version (deref-u32 major) (let ((r (make-dm-version (deref-u32 major)
(deref-u32 minor) (deref-u32 minor)
(deref-u32 patch)))) (deref-u32 patch))))
(foreign-free (ftype-pointer-address major)) r)
(foreign-free (ftype-pointer-address minor))
(foreign-free (ftype-pointer-address patch))
r)
(fail "couldn't get dm version")))) (fail "couldn't get dm version"))))
(define (remove-all) (define (remove-all)
@ -133,9 +161,6 @@
(define-ftype DevListPtr (* DevList)) (define-ftype DevListPtr (* DevList))
(define-record-type device-details
(fields name major minor))
(define (cstring->string str) (define (cstring->string str)
(let loop ((i 0) (let loop ((i 0)
(acc '())) (acc '()))
@ -171,7 +196,7 @@
(if (ftype-pointer-null? dl) (if (ftype-pointer-null? dl)
acc acc
(loop (ftype-ref DevList (next) dl) (loop (ftype-ref DevList (next) dl)
(cons (make-device-details (cons (make-dm-device
(cstring->string (ftype-ref DevList (name) dl)) (cstring->string (ftype-ref DevList (name) dl))
(ftype-ref DevList (major) dl) (ftype-ref DevList (major) dl)
(ftype-ref DevList (minor) dl)) (ftype-ref DevList (minor) dl))
@ -180,11 +205,13 @@
(define (create-device name uuid) (define (create-device name uuid)
(define create (define create
(foreign-procedure "dm_create_device" ((* DMIoctlInterface) string string) int)) (foreign-procedure "dm_create_device" ((* DMIoctlInterface) string string (* unsigned-32) (* unsigned-32)) int))
(if (zero? (create (current-dm-interface) name uuid)) (with-u32s (major minor)
(make-dm-device name) (let ((r (create (current-dm-interface) name uuid major minor)))
(fail "create-device failed"))) (if (zero? r)
(make-dm-device name (deref-u32 major) (deref-u32 minor))
(fail (fmt #f "create-device failed with error code " r))))))
(define-syntax define-dev-cmd (define-syntax define-dev-cmd
(syntax-rules () (syntax-rules ()
@ -267,27 +294,35 @@
(define load (define load
(foreign-procedure "dm_load" ((* DMIoctlInterface) string (* Target)) int)) (foreign-procedure "dm_load" ((* DMIoctlInterface) string (* Target)) int))
(info dev " <- " targets)
(let* ((ctargets (build-c-targets targets))) (let* ((ctargets (build-c-targets targets)))
(ensure-free-ctargets ctargets (ensure-free-ctargets ctargets
(unless (zero? (load (current-dm-interface) (dm-device-name dev) ctargets)) (unless (zero? (load (current-dm-interface) (dm-device-name dev) ctargets))
(fail "dm_load failed"))))) (fail "dm_load failed")))))
(define (with-empty-device-fn name uuid fn)
(let ((v (create-device name uuid)))
(dynamic-wind
(lambda () #f)
(lambda () (fn v))
(lambda () (remove-device v)))))
(define-syntax with-empty-device (define-syntax with-empty-device
(syntax-rules () (syntax-rules ()
((_ (var name uuid) b1 b2 ...) ((_ (var name uuid) b1 b2 ...)
(let ((var (create-device name uuid))) (with-empty-device-fn name uuid (lambda (var) b1 b2 ...)))))
(dynamic-wind
(lambda () #f) (define (with-device-fn name uuid table fn)
(lambda () b1 b2 ...) (with-empty-device-fn name uuid
(lambda () (remove-device var))))))) (lambda (v)
(load-table v table)
(resume-device v)
(fn v))))
(define-syntax with-device (define-syntax with-device
(syntax-rules () (syntax-rules ()
((_ (var name uuid table) b1 b2 ...) ((_ (var name uuid table) b1 b2 ...)
(with-empty-device (var name uuid) (with-device-fn name uuid table (lambda (var) b1 b2 ...)))))
(load-table var table)
(resume-device var)
b1 b2 ...))))
(define-syntax with-devices (define-syntax with-devices
(syntax-rules () (syntax-rules ()
@ -337,4 +372,25 @@
(foreign-procedure "dm_table" ((* DMIoctlInterface) string (* TargetPtr)) int)) (foreign-procedure "dm_table" ((* DMIoctlInterface) string (* TargetPtr)) int))
(do-status dev get-status "dm_table")) (do-status dev get-status "dm_table"))
)
(define (message dev sector msg)
(define c-message
(foreign-procedure "dm_message" ((* DMIoctlInterface) string unsigned-64 string) int))
(unless (zero? (c-message (current-dm-interface) (dm-device-name dev) sector msg))
(fail (fmt #f "message ioctl failed"))))
;; Works with either a raw path, or a dm-device. Returns a disk-size.
(define (get-dev-size dev)
(define c-get-size
(foreign-procedure "get_dev_size" (string (* unsigned-64)) int))
(let* ((path (if (string? dev) dev (dm-device-path dev)))
(size (make-ftype-pointer unsigned-64 (foreign-alloc (ftype-sizeof unsigned-64))))
(r (c-get-size path size)))
(let ((result (ftype-ref unsigned-64 () size)))
(foreign-free (ftype-pointer-address size))
(if (zero? r)
(sectors result)
(fail (fmt #f "get-dev-size failed: " r))))))
)

View File

@ -1,6 +1,25 @@
(library (library
(disk-units) (disk-units)
(export meg) (export bytes
(import (rnrs)) sectors
kilo
meg
gig
tera
to-bytes
to-sectors)
(import (rnrs)
(math-utils))
(define (meg n) (* 1024 1024 n))) (define-record-type disk-size (fields (mutable sectors)))
(define (bytes n) (make-disk-size (div-up n 512)))
(define (sectors n) (make-disk-size n))
(define (kilo n) (make-disk-size (* n 2)))
(define (meg n) (make-disk-size (* n 2 1024)))
(define (gig n) (make-disk-size (* n 1024 1024)))
(define (tera n) (make-disk-size (* n 1024 104 1024)))
(define (to-bytes ds) (* 512 (disk-size-sectors ds)))
(define (to-sectors ds) (disk-size-sectors ds))
)

View File

@ -92,7 +92,7 @@
(fmt #t (fmt #t
(cat (fmt-keys prev-keys keys) (cat (fmt-keys prev-keys keys)
(dsp #\space) (dsp #\space)
(pad-char #\. (space-to 38)) (pad-char #\. (space-to 60))
(dsp #\space))) (dsp #\space)))
(flush) (flush)
(fmt #t (cat (fn keys) nl)) (fmt #t (cat (fn keys) nl))
@ -111,6 +111,15 @@
(apply string-append cwd "/" (apply string-append cwd "/"
(intersperse "/" (map symbol->string keys)))) (intersperse "/" (map symbol->string keys))))
(define (log-exceptions thunk)
(with-exception-handler
(lambda (x)
(let-values (((txt-port get) (open-string-output-port)))
(display-condition x txt-port)
(log-error (get)))
(raise x))
thunk))
(define-syntax define-scenario (define-syntax define-scenario
(lambda (x) (lambda (x)
(syntax-case x () (syntax-case x ()
@ -124,7 +133,7 @@
(file-options no-fail) (file-options no-fail)
(buffer-mode line) (buffer-mode line)
(native-transcoder)) (native-transcoder))
b1 b2 ...))))))))) (log-exceptions (lambda () b1 b2 ...)))))))))))
(define (fail msg) (define (fail msg)
(raise (condition (raise (condition
@ -149,9 +158,9 @@
(if (error? x) (if (error? x)
(k #f) (k #f)
(raise x))) (raise x)))
(lambda () (lambda ()
(thunk) (thunk)
#t))))) #t)))))
;; Returns #t if all tests pass. ;; Returns #t if all tests pass.
(define (run-scenarios ss) (define (run-scenarios ss)

View File

@ -1,6 +1,6 @@
(library (library
(loops) (loops)
(export upto while) (export upto from-to while)
(import (rnrs)) (import (rnrs))
(define-syntax upto (define-syntax upto
@ -11,6 +11,14 @@
(begin body ...) (begin body ...)
(loop (+ 1 var))))))) (loop (+ 1 var)))))))
(define-syntax from-to
(syntax-rules ()
((_ (var f t step) b1 b2 ...)
(let loop ((var f))
(unless (= var t)
b1 b2 ...
(loop (+ var step)))))))
(define-syntax while (define-syntax while
(syntax-rules () (syntax-rules ()
((_ (var exp) body ...) ((_ (var exp) body ...)

View File

@ -0,0 +1,10 @@
(library
(math-utils)
(export div-up)
(import (chezscheme))
(define (div-up n d)
(/ (+ n (- d 1)) d))
)