3 # Copyright (c) 2008 Nicolas Pitre
6 test_description
='resilience to pack corruptions with redundant objects'
9 # Note: the test objects are created with knowledge of their pack encoding
10 # to ensure good code path coverage, and to facilitate direct alteration
11 # later on. The assumed characteristics are:
13 # 1) blob_2 is a delta with blob_1 for base and blob_3 is a delta with blob2
14 # for base, such that blob_3 delta depth is 2;
16 # 2) the bulk of object data is uncompressible so the text part remains
19 # 3) object header is always 2 bytes.
22 test-genrandom
"foo" 2000 > file_1
&&
23 test-genrandom
"foo" 1800 > file_2
&&
24 test-genrandom
"foo" 1800 > file_3
&&
25 echo " base " >> file_1
&&
26 echo " delta1 " >> file_2
&&
27 echo " delta delta2 " >> file_3
&&
28 test-genrandom
"bar" 150 >> file_2
&&
29 test-genrandom
"baz" 100 >> file_3
35 blob_1
=`git hash-object -t blob -w file_1` &&
36 blob_2
=`git hash-object -t blob -w file_2` &&
37 blob_3
=`git hash-object -t blob -w file_3` &&
38 pack
=`printf "$blob_1\n$blob_2\n$blob_3\n" |
39 git pack-objects $@ .git/objects/pack/pack` &&
40 pack
=".git/objects/pack/pack-${pack}" &&
41 git verify-pack
-v ${pack}.pack
45 pack
=`printf "$blob_1\n$blob_2\n$blob_3\n" |
46 git pack-objects $@ .git/objects/pack/pack` &&
47 pack
=".git/objects/pack/pack-${pack}"
51 ofs
=`git show-index < ${pack}.idx | grep $1 | cut -f1 -d" "` &&
53 chmod +w
${pack}.pack
&&
54 dd of
=${pack}.pack count
=1 bs
=1 conv
=notrunc seek
=$ofs &&
55 test_must_fail git verify-pack
${pack}.pack
59 'initial setup validation' \
63 git cat-file blob $blob_1 > /dev/null &&
64 git cat-file blob $blob_2 > /dev/null &&
65 git cat-file blob $blob_3 > /dev/null'
68 'create corruption in header of first object' \
69 'do_corrupt_object $blob_1 0 < /dev/zero &&
70 test_must_fail git cat-file blob $blob_1 > /dev/null &&
71 test_must_fail git cat-file blob $blob_2 > /dev/null &&
72 test_must_fail git cat-file blob $blob_3 > /dev/null'
75 '... but having a loose copy allows for full recovery' \
76 'mv ${pack}.idx tmp &&
77 git hash-object -t blob -w file_1 &&
79 git cat-file blob $blob_1 > /dev/null &&
80 git cat-file blob $blob_2 > /dev/null &&
81 git cat-file blob $blob_3 > /dev/null'
84 '... and loose copy of first delta allows for partial recovery' \
86 test_must_fail git cat-file blob $blob_2 > /dev/null &&
88 git hash-object -t blob -w file_2 &&
90 test_must_fail git cat-file blob $blob_1 > /dev/null &&
91 git cat-file blob $blob_2 > /dev/null &&
92 git cat-file blob $blob_3 > /dev/null'
95 'create corruption in data of first object' \
98 chmod +w ${pack}.pack &&
99 perl -i.bak -pe "s/ base /abcdef/" ${pack}.pack &&
100 test_must_fail git cat-file blob $blob_1 > /dev/null &&
101 test_must_fail git cat-file blob $blob_2 > /dev/null &&
102 test_must_fail git cat-file blob $blob_3 > /dev/null'
104 test_expect_success \
105 '... but having a loose copy allows for full recovery' \
106 'mv ${pack}.idx tmp &&
107 git hash-object -t blob -w file_1 &&
108 mv tmp ${pack}.idx &&
109 git cat-file blob $blob_1 > /dev/null &&
110 git cat-file blob $blob_2 > /dev/null &&
111 git cat-file blob $blob_3 > /dev/null'
113 test_expect_success \
114 '... and loose copy of second object allows for partial recovery' \
116 test_must_fail git cat-file blob $blob_2 > /dev/null &&
117 mv ${pack}.idx tmp &&
118 git hash-object -t blob -w file_2 &&
119 mv tmp ${pack}.idx &&
120 test_must_fail git cat-file blob $blob_1 > /dev/null &&
121 git cat-file blob $blob_2 > /dev/null &&
122 git cat-file blob $blob_3 > /dev/null'
124 test_expect_success \
125 'create corruption in header of first delta' \
128 do_corrupt_object $blob_2 0 < /dev/zero &&
129 git cat-file blob $blob_1 > /dev/null &&
130 test_must_fail git cat-file blob $blob_2 > /dev/null &&
131 test_must_fail git cat-file blob $blob_3 > /dev/null'
133 test_expect_success \
134 '... but having a loose copy allows for full recovery' \
135 'mv ${pack}.idx tmp &&
136 git hash-object -t blob -w file_2 &&
137 mv tmp ${pack}.idx &&
138 git cat-file blob $blob_1 > /dev/null &&
139 git cat-file blob $blob_2 > /dev/null &&
140 git cat-file blob $blob_3 > /dev/null'
142 test_expect_success \
143 '... and then a repack "clears" the corruption' \
146 git verify-pack ${pack}.pack &&
147 git cat-file blob $blob_1 > /dev/null &&
148 git cat-file blob $blob_2 > /dev/null &&
149 git cat-file blob $blob_3 > /dev/null'
151 test_expect_success \
152 'create corruption in data of first delta' \
155 chmod +w ${pack}.pack &&
156 perl -i.bak -pe "s/ delta1 /abcdefgh/" ${pack}.pack &&
157 git cat-file blob $blob_1 > /dev/null &&
158 test_must_fail git cat-file blob $blob_2 > /dev/null &&
159 test_must_fail git cat-file blob $blob_3 > /dev/null'
161 test_expect_success \
162 '... but having a loose copy allows for full recovery' \
163 'mv ${pack}.idx tmp &&
164 git hash-object -t blob -w file_2 &&
165 mv tmp ${pack}.idx &&
166 git cat-file blob $blob_1 > /dev/null &&
167 git cat-file blob $blob_2 > /dev/null &&
168 git cat-file blob $blob_3 > /dev/null'
170 test_expect_success \
171 '... and then a repack "clears" the corruption' \
174 git verify-pack ${pack}.pack &&
175 git cat-file blob $blob_1 > /dev/null &&
176 git cat-file blob $blob_2 > /dev/null &&
177 git cat-file blob $blob_3 > /dev/null'
179 test_expect_success \
180 'corruption in delta base reference of first delta (OBJ_REF_DELTA)' \
183 do_corrupt_object $blob_2 2 < /dev/zero &&
184 git cat-file blob $blob_1 > /dev/null &&
185 test_must_fail git cat-file blob $blob_2 > /dev/null &&
186 test_must_fail git cat-file blob $blob_3 > /dev/null'
188 test_expect_success \
189 '... but having a loose copy allows for full recovery' \
190 'mv ${pack}.idx tmp &&
191 git hash-object -t blob -w file_2 &&
192 mv tmp ${pack}.idx &&
193 git cat-file blob $blob_1 > /dev/null &&
194 git cat-file blob $blob_2 > /dev/null &&
195 git cat-file blob $blob_3 > /dev/null'
197 test_expect_success \
198 '... and then a repack "clears" the corruption' \
201 git verify-pack ${pack}.pack &&
202 git cat-file blob $blob_1 > /dev/null &&
203 git cat-file blob $blob_2 > /dev/null &&
204 git cat-file blob $blob_3 > /dev/null'
206 test_expect_success \
207 'corruption #0 in delta base reference of first delta (OBJ_OFS_DELTA)' \
208 'create_new_pack --delta-base-offset &&
210 do_corrupt_object $blob_2 2 < /dev/zero &&
211 git cat-file blob $blob_1 > /dev/null &&
212 test_must_fail git cat-file blob $blob_2 > /dev/null &&
213 test_must_fail git cat-file blob $blob_3 > /dev/null'
215 test_expect_success \
216 '... but having a loose copy allows for full recovery' \
217 'mv ${pack}.idx tmp &&
218 git hash-object -t blob -w file_2 &&
219 mv tmp ${pack}.idx &&
220 git cat-file blob $blob_1 > /dev/null &&
221 git cat-file blob $blob_2 > /dev/null &&
222 git cat-file blob $blob_3 > /dev/null'
224 test_expect_success \
225 '... and then a repack "clears" the corruption' \
226 'do_repack --delta-base-offset &&
228 git verify-pack ${pack}.pack &&
229 git cat-file blob $blob_1 > /dev/null &&
230 git cat-file blob $blob_2 > /dev/null &&
231 git cat-file blob $blob_3 > /dev/null'
233 test_expect_success \
234 'corruption #1 in delta base reference of first delta (OBJ_OFS_DELTA)' \
235 'create_new_pack --delta-base-offset &&
237 printf "\001" | do_corrupt_object $blob_2 2 &&
238 git cat-file blob $blob_1 > /dev/null &&
239 test_must_fail git cat-file blob $blob_2 > /dev/null &&
240 test_must_fail git cat-file blob $blob_3 > /dev/null'
242 test_expect_success \
243 '... but having a loose copy allows for full recovery' \
244 'mv ${pack}.idx tmp &&
245 git hash-object -t blob -w file_2 &&
246 mv tmp ${pack}.idx &&
247 git cat-file blob $blob_1 > /dev/null &&
248 git cat-file blob $blob_2 > /dev/null &&
249 git cat-file blob $blob_3 > /dev/null'
251 test_expect_success \
252 '... and then a repack "clears" the corruption' \
253 'do_repack --delta-base-offset &&
255 git verify-pack ${pack}.pack &&
256 git cat-file blob $blob_1 > /dev/null &&
257 git cat-file blob $blob_2 > /dev/null &&
258 git cat-file blob $blob_3 > /dev/null'
260 test_expect_success \
261 '... and a redundant pack allows for full recovery too' \
262 'do_corrupt_object $blob_2 2 < /dev/zero &&
263 git cat-file blob $blob_1 > /dev/null &&
264 test_must_fail git cat-file blob $blob_2 > /dev/null &&
265 test_must_fail git cat-file blob $blob_3 > /dev/null &&
266 mv ${pack}.idx tmp &&
267 git hash-object -t blob -w file_1 &&
268 git hash-object -t blob -w file_2 &&
269 printf "$blob_1\n$blob_2\n" | git pack-objects .git/objects/pack/pack &&
271 mv tmp ${pack}.idx &&
272 git cat-file blob $blob_1 > /dev/null &&
273 git cat-file blob $blob_2 > /dev/null &&
274 git cat-file blob $blob_3 > /dev/null'