mirror of
https://git.in.rschanz.org/ryan77627/guix.git
synced 2024-12-30 16:12:58 -05:00
adb158b739
Reported by Andreas Enge <andreas@enge.fr> in <https://bugs.gnu.org/33676>. * guix/store/deduplication.scm (replace-with-link): Catch ENOSPC around 'get-temp-link'. Do nothing when 'get-temp-link' throws ENOSPC. Move code to restore PARENT's permissions outside of 'catch'. * tests/store-deduplication.scm ("deduplicate, ENOSPC"): New test.
109 lines
4.4 KiB
Scheme
109 lines
4.4 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
|
|
;;; Copyright © 2018 Ludovic Courtès <ludo@gnu.org>
|
|
;;;
|
|
;;; This file is part of GNU Guix.
|
|
;;;
|
|
;;; GNU Guix is free software; you can redistribute it and/or modify it
|
|
;;; under the terms of the GNU General Public License as published by
|
|
;;; the Free Software Foundation; either version 3 of the License, or (at
|
|
;;; your option) any later version.
|
|
;;;
|
|
;;; GNU Guix is distributed in the hope that it will be useful, but
|
|
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
;;; GNU General Public License for more details.
|
|
;;;
|
|
;;; You should have received a copy of the GNU General Public License
|
|
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
(define-module (test-store-deduplication)
|
|
#:use-module (guix tests)
|
|
#:use-module (guix store deduplication)
|
|
#:use-module (gcrypt hash)
|
|
#:use-module ((guix utils) #:select (call-with-temporary-directory))
|
|
#:use-module (guix build utils)
|
|
#:use-module (rnrs bytevectors)
|
|
#:use-module (ice-9 binary-ports)
|
|
#:use-module (srfi srfi-1)
|
|
#:use-module (srfi srfi-64))
|
|
|
|
(test-begin "store-deduplication")
|
|
|
|
(test-equal "deduplicate"
|
|
(cons* #t #f ;inode comparisons
|
|
2 (make-list 5 6)) ;'nlink' values
|
|
|
|
(call-with-temporary-directory
|
|
(lambda (store)
|
|
(let ((data (string->utf8 "Hello, world!"))
|
|
(identical (map (lambda (n)
|
|
(string-append store "/" (number->string n)
|
|
"/a/b/c"))
|
|
(iota 5)))
|
|
(unique (string-append store "/unique")))
|
|
(for-each (lambda (file)
|
|
(mkdir-p (dirname file))
|
|
(call-with-output-file file
|
|
(lambda (port)
|
|
(put-bytevector port data))))
|
|
identical)
|
|
;; Make the parent of IDENTICAL read-only. This should not prevent
|
|
;; deduplication from inserting its hard link.
|
|
(chmod (dirname (second identical)) #o544)
|
|
|
|
(call-with-output-file unique
|
|
(lambda (port)
|
|
(put-bytevector port (string->utf8 "This is unique."))))
|
|
|
|
(deduplicate store (nar-sha256 store) #:store store)
|
|
|
|
;; (system (string-append "ls -lRia " store))
|
|
(cons* (apply = (map (compose stat:ino stat) identical))
|
|
(= (stat:ino (stat unique))
|
|
(stat:ino (stat (car identical))))
|
|
(stat:nlink (stat unique))
|
|
(map (compose stat:nlink stat) identical))))))
|
|
|
|
(test-equal "deduplicate, ENOSPC"
|
|
(cons* #f ;inode comparison
|
|
(append (make-list 3 4)
|
|
(make-list 7 1))) ;'nlink' values
|
|
|
|
;; In this scenario the first 3 files are properly deduplicated and then we
|
|
;; simulate a full '.links' directory where link(2) gets ENOSPC, thereby
|
|
;; preventing deduplication of the subsequent files.
|
|
(call-with-temporary-directory
|
|
(lambda (store)
|
|
(let ((true-link link)
|
|
(links 0)
|
|
(data1 (string->utf8 "Hello, world!"))
|
|
(data2 (string->utf8 "Hi, world!"))
|
|
(identical (map (lambda (n)
|
|
(string-append store "/" (number->string n)
|
|
"/a/b/c"))
|
|
(iota 10)))
|
|
(populate (lambda (data)
|
|
(lambda (file)
|
|
(mkdir-p (dirname file))
|
|
(call-with-output-file file
|
|
(lambda (port)
|
|
(put-bytevector port data)))))))
|
|
(for-each (populate data1) (take identical 5))
|
|
(for-each (populate data2) (drop identical 5))
|
|
(dynamic-wind
|
|
(lambda ()
|
|
(set! link (lambda (old new)
|
|
(set! links (+ links 1))
|
|
(if (<= links 3)
|
|
(true-link old new)
|
|
(throw 'system-error "link" "~A" '("Whaaat?!")
|
|
(list ENOSPC))))))
|
|
(lambda ()
|
|
(deduplicate store (nar-sha256 store) #:store store))
|
|
(lambda ()
|
|
(set! link true-link)))
|
|
|
|
(cons (apply = (map (compose stat:ino stat) identical))
|
|
(map (compose stat:nlink stat) identical))))))
|
|
|
|
(test-end "store-deduplication")
|