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1 | ;;; GNU Guix --- Functional package management for GNU |
2 | ;;; Copyright © 2018 Ludovic Courtès <ludo@gnu.org> | |
3 | ;;; | |
4 | ;;; This file is part of GNU Guix. | |
5 | ;;; | |
6 | ;;; GNU Guix is free software; you can redistribute it and/or modify it | |
7 | ;;; under the terms of the GNU General Public License as published by | |
8 | ;;; the Free Software Foundation; either version 3 of the License, or (at | |
9 | ;;; your option) any later version. | |
10 | ;;; | |
11 | ;;; GNU Guix is distributed in the hope that it will be useful, but | |
12 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ;;; GNU General Public License for more details. | |
15 | ;;; | |
16 | ;;; You should have received a copy of the GNU General Public License | |
17 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. | |
18 | ||
19 | (define-module (test-store-deduplication) | |
20 | #:use-module (guix tests) | |
21 | #:use-module (guix store deduplication) | |
ca719424 | 22 | #:use-module (gcrypt hash) |
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23 | #:use-module ((guix utils) #:select (call-with-temporary-directory)) |
24 | #:use-module (guix build utils) | |
25 | #:use-module (rnrs bytevectors) | |
26 | #:use-module (ice-9 binary-ports) | |
27 | #:use-module (srfi srfi-1) | |
28 | #:use-module (srfi srfi-64)) | |
29 | ||
30 | (test-begin "store-deduplication") | |
31 | ||
32 | (test-equal "deduplicate" | |
33 | (cons* #t #f ;inode comparisons | |
34 | 2 (make-list 5 6)) ;'nlink' values | |
35 | ||
36 | (call-with-temporary-directory | |
37 | (lambda (store) | |
38 | (let ((data (string->utf8 "Hello, world!")) | |
39 | (identical (map (lambda (n) | |
0d0438ed LC |
40 | (string-append store "/" (number->string n) |
41 | "/a/b/c")) | |
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42 | (iota 5))) |
43 | (unique (string-append store "/unique"))) | |
44 | (for-each (lambda (file) | |
0d0438ed | 45 | (mkdir-p (dirname file)) |
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46 | (call-with-output-file file |
47 | (lambda (port) | |
48 | (put-bytevector port data)))) | |
49 | identical) | |
3dbf3319 | 50 | ;; Make the parent of IDENTICAL read-only. This should not prevent |
adb158b7 | 51 | ;; deduplication from inserting its hard link. |
3dbf3319 LC |
52 | (chmod (dirname (second identical)) #o544) |
53 | ||
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54 | (call-with-output-file unique |
55 | (lambda (port) | |
56 | (put-bytevector port (string->utf8 "This is unique.")))) | |
57 | ||
0d0438ed | 58 | (deduplicate store (nar-sha256 store) #:store store) |
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59 | |
60 | ;; (system (string-append "ls -lRia " store)) | |
61 | (cons* (apply = (map (compose stat:ino stat) identical)) | |
62 | (= (stat:ino (stat unique)) | |
63 | (stat:ino (stat (car identical)))) | |
64 | (stat:nlink (stat unique)) | |
65 | (map (compose stat:nlink stat) identical)))))) | |
66 | ||
adb158b7 LC |
67 | (test-equal "deduplicate, ENOSPC" |
68 | (cons* #f ;inode comparison | |
69 | (append (make-list 3 4) | |
70 | (make-list 7 1))) ;'nlink' values | |
71 | ||
72 | ;; In this scenario the first 3 files are properly deduplicated and then we | |
73 | ;; simulate a full '.links' directory where link(2) gets ENOSPC, thereby | |
74 | ;; preventing deduplication of the subsequent files. | |
75 | (call-with-temporary-directory | |
76 | (lambda (store) | |
77 | (let ((true-link link) | |
78 | (links 0) | |
79 | (data1 (string->utf8 "Hello, world!")) | |
80 | (data2 (string->utf8 "Hi, world!")) | |
81 | (identical (map (lambda (n) | |
82 | (string-append store "/" (number->string n) | |
83 | "/a/b/c")) | |
84 | (iota 10))) | |
85 | (populate (lambda (data) | |
86 | (lambda (file) | |
87 | (mkdir-p (dirname file)) | |
88 | (call-with-output-file file | |
89 | (lambda (port) | |
90 | (put-bytevector port data))))))) | |
91 | (for-each (populate data1) (take identical 5)) | |
92 | (for-each (populate data2) (drop identical 5)) | |
93 | (dynamic-wind | |
94 | (lambda () | |
95 | (set! link (lambda (old new) | |
96 | (set! links (+ links 1)) | |
97 | (if (<= links 3) | |
98 | (true-link old new) | |
99 | (throw 'system-error "link" "~A" '("Whaaat?!") | |
100 | (list ENOSPC)))))) | |
101 | (lambda () | |
102 | (deduplicate store (nar-sha256 store) #:store store)) | |
103 | (lambda () | |
104 | (set! link true-link))) | |
105 | ||
106 | (cons (apply = (map (compose stat:ino stat) identical)) | |
107 | (map (compose stat:nlink stat) identical)))))) | |
108 | ||
bf5bf577 | 109 | (test-end "store-deduplication") |