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287 lines
10 KiB
287 lines
10 KiB
#!/bin/sh |
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# |
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# Copyright (c) 2008 Nicolas Pitre |
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# |
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test_description='resilience to pack corruptions with redundant objects' |
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. ./test-lib.sh |
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# Note: the test objects are created with knowledge of their pack encoding |
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# to ensure good code path coverage, and to facilitate direct alteration |
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# later on. The assumed characteristics are: |
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# |
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# 1) blob_2 is a delta with blob_1 for base and blob_3 is a delta with blob2 |
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# for base, such that blob_3 delta depth is 2; |
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# |
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# 2) the bulk of object data is uncompressible so the text part remains |
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# visible; |
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# |
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# 3) object header is always 2 bytes. |
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create_test_files() { |
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test-genrandom "foo" 2000 > file_1 && |
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test-genrandom "foo" 1800 > file_2 && |
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test-genrandom "foo" 1800 > file_3 && |
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echo " base " >> file_1 && |
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echo " delta1 " >> file_2 && |
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echo " delta delta2 " >> file_3 && |
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test-genrandom "bar" 150 >> file_2 && |
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test-genrandom "baz" 100 >> file_3 |
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} |
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create_new_pack() { |
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rm -rf .git && |
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git init && |
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blob_1=`git hash-object -t blob -w file_1` && |
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blob_2=`git hash-object -t blob -w file_2` && |
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blob_3=`git hash-object -t blob -w file_3` && |
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pack=`printf "$blob_1\n$blob_2\n$blob_3\n" | |
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git pack-objects $@ .git/objects/pack/pack` && |
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pack=".git/objects/pack/pack-${pack}" && |
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git verify-pack -v ${pack}.pack |
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} |
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do_repack() { |
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pack=`printf "$blob_1\n$blob_2\n$blob_3\n" | |
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git pack-objects $@ .git/objects/pack/pack` && |
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pack=".git/objects/pack/pack-${pack}" |
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} |
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do_corrupt_object() { |
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ofs=`git show-index < ${pack}.idx | grep $1 | cut -f1 -d" "` && |
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ofs=$(($ofs + $2)) && |
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chmod +w ${pack}.pack && |
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dd of=${pack}.pack count=1 bs=1 conv=notrunc seek=$ofs && |
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test_must_fail git verify-pack ${pack}.pack |
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} |
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printf '\0' > zero |
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test_expect_success \ |
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'initial setup validation' \ |
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'create_test_files && |
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create_new_pack && |
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git prune-packed && |
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git cat-file blob $blob_1 > /dev/null && |
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git cat-file blob $blob_2 > /dev/null && |
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git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'create corruption in header of first object' \ |
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'do_corrupt_object $blob_1 0 < zero && |
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test_must_fail git cat-file blob $blob_1 > /dev/null && |
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test_must_fail git cat-file blob $blob_2 > /dev/null && |
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test_must_fail git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'... but having a loose copy allows for full recovery' \ |
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'mv ${pack}.idx tmp && |
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git hash-object -t blob -w file_1 && |
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mv tmp ${pack}.idx && |
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git cat-file blob $blob_1 > /dev/null && |
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git cat-file blob $blob_2 > /dev/null && |
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git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'... and loose copy of first delta allows for partial recovery' \ |
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'git prune-packed && |
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test_must_fail git cat-file blob $blob_2 > /dev/null && |
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mv ${pack}.idx tmp && |
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git hash-object -t blob -w file_2 && |
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mv tmp ${pack}.idx && |
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test_must_fail git cat-file blob $blob_1 > /dev/null && |
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git cat-file blob $blob_2 > /dev/null && |
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git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'create corruption in data of first object' \ |
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'create_new_pack && |
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git prune-packed && |
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chmod +w ${pack}.pack && |
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"$PERL_PATH" -i.bak -pe "s/ base /abcdef/" ${pack}.pack && |
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test_must_fail git cat-file blob $blob_1 > /dev/null && |
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test_must_fail git cat-file blob $blob_2 > /dev/null && |
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test_must_fail git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'... but having a loose copy allows for full recovery' \ |
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'mv ${pack}.idx tmp && |
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git hash-object -t blob -w file_1 && |
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mv tmp ${pack}.idx && |
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git cat-file blob $blob_1 > /dev/null && |
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git cat-file blob $blob_2 > /dev/null && |
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git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'... and loose copy of second object allows for partial recovery' \ |
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'git prune-packed && |
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test_must_fail git cat-file blob $blob_2 > /dev/null && |
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mv ${pack}.idx tmp && |
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git hash-object -t blob -w file_2 && |
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mv tmp ${pack}.idx && |
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test_must_fail git cat-file blob $blob_1 > /dev/null && |
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git cat-file blob $blob_2 > /dev/null && |
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git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'create corruption in header of first delta' \ |
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'create_new_pack && |
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git prune-packed && |
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do_corrupt_object $blob_2 0 < zero && |
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git cat-file blob $blob_1 > /dev/null && |
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test_must_fail git cat-file blob $blob_2 > /dev/null && |
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test_must_fail git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'... but having a loose copy allows for full recovery' \ |
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'mv ${pack}.idx tmp && |
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git hash-object -t blob -w file_2 && |
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mv tmp ${pack}.idx && |
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git cat-file blob $blob_1 > /dev/null && |
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git cat-file blob $blob_2 > /dev/null && |
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git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'... and then a repack "clears" the corruption' \ |
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'do_repack && |
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git prune-packed && |
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git verify-pack ${pack}.pack && |
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git cat-file blob $blob_1 > /dev/null && |
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git cat-file blob $blob_2 > /dev/null && |
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git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'create corruption in data of first delta' \ |
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'create_new_pack && |
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git prune-packed && |
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chmod +w ${pack}.pack && |
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"$PERL_PATH" -i.bak -pe "s/ delta1 /abcdefgh/" ${pack}.pack && |
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git cat-file blob $blob_1 > /dev/null && |
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test_must_fail git cat-file blob $blob_2 > /dev/null && |
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test_must_fail git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'... but having a loose copy allows for full recovery' \ |
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'mv ${pack}.idx tmp && |
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git hash-object -t blob -w file_2 && |
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mv tmp ${pack}.idx && |
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git cat-file blob $blob_1 > /dev/null && |
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git cat-file blob $blob_2 > /dev/null && |
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git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'... and then a repack "clears" the corruption' \ |
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'do_repack && |
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git prune-packed && |
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git verify-pack ${pack}.pack && |
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git cat-file blob $blob_1 > /dev/null && |
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git cat-file blob $blob_2 > /dev/null && |
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git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'corruption in delta base reference of first delta (OBJ_REF_DELTA)' \ |
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'create_new_pack && |
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git prune-packed && |
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do_corrupt_object $blob_2 2 < zero && |
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git cat-file blob $blob_1 > /dev/null && |
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test_must_fail git cat-file blob $blob_2 > /dev/null && |
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test_must_fail git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'... but having a loose copy allows for full recovery' \ |
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'mv ${pack}.idx tmp && |
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git hash-object -t blob -w file_2 && |
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mv tmp ${pack}.idx && |
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git cat-file blob $blob_1 > /dev/null && |
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git cat-file blob $blob_2 > /dev/null && |
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git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'... and then a repack "clears" the corruption' \ |
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'do_repack && |
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git prune-packed && |
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git verify-pack ${pack}.pack && |
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git cat-file blob $blob_1 > /dev/null && |
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git cat-file blob $blob_2 > /dev/null && |
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git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'corruption #0 in delta base reference of first delta (OBJ_OFS_DELTA)' \ |
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'create_new_pack --delta-base-offset && |
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git prune-packed && |
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do_corrupt_object $blob_2 2 < zero && |
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git cat-file blob $blob_1 > /dev/null && |
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test_must_fail git cat-file blob $blob_2 > /dev/null && |
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test_must_fail git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'... but having a loose copy allows for full recovery' \ |
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'mv ${pack}.idx tmp && |
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git hash-object -t blob -w file_2 && |
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mv tmp ${pack}.idx && |
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git cat-file blob $blob_1 > /dev/null && |
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git cat-file blob $blob_2 > /dev/null && |
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git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'... and then a repack "clears" the corruption' \ |
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'do_repack --delta-base-offset && |
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git prune-packed && |
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git verify-pack ${pack}.pack && |
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git cat-file blob $blob_1 > /dev/null && |
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git cat-file blob $blob_2 > /dev/null && |
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git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'corruption #1 in delta base reference of first delta (OBJ_OFS_DELTA)' \ |
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'create_new_pack --delta-base-offset && |
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git prune-packed && |
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printf "\001" | do_corrupt_object $blob_2 2 && |
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git cat-file blob $blob_1 > /dev/null && |
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test_must_fail git cat-file blob $blob_2 > /dev/null && |
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test_must_fail git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'... but having a loose copy allows for full recovery' \ |
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'mv ${pack}.idx tmp && |
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git hash-object -t blob -w file_2 && |
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mv tmp ${pack}.idx && |
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git cat-file blob $blob_1 > /dev/null && |
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git cat-file blob $blob_2 > /dev/null && |
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git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'... and then a repack "clears" the corruption' \ |
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'do_repack --delta-base-offset && |
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git prune-packed && |
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git verify-pack ${pack}.pack && |
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git cat-file blob $blob_1 > /dev/null && |
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git cat-file blob $blob_2 > /dev/null && |
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git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'... and a redundant pack allows for full recovery too' \ |
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'do_corrupt_object $blob_2 2 < zero && |
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git cat-file blob $blob_1 > /dev/null && |
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test_must_fail git cat-file blob $blob_2 > /dev/null && |
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test_must_fail git cat-file blob $blob_3 > /dev/null && |
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mv ${pack}.idx tmp && |
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git hash-object -t blob -w file_1 && |
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git hash-object -t blob -w file_2 && |
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printf "$blob_1\n$blob_2\n" | git pack-objects .git/objects/pack/pack && |
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git prune-packed && |
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mv tmp ${pack}.idx && |
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git cat-file blob $blob_1 > /dev/null && |
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git cat-file blob $blob_2 > /dev/null && |
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git cat-file blob $blob_3 > /dev/null' |
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test_expect_success \ |
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'corrupting header to have too small output buffer fails unpack' \ |
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'create_new_pack && |
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git prune-packed && |
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printf "\262\001" | do_corrupt_object $blob_1 0 && |
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test_must_fail git cat-file blob $blob_1 > /dev/null && |
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test_must_fail git cat-file blob $blob_2 > /dev/null && |
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test_must_fail git cat-file blob $blob_3 > /dev/null' |
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test_done
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