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btrfs-progs: tests: truncate test image to 0 first

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We use the prepare_test_dev helper to make sure the image has at least
this size. The "at least" part is not desired by some tests as the
device might be larger than the test expects.

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2018-01-23 17:22:30 +01:00
parent 07eafd93b2
commit 81dd246d95
1 changed files with 2 additions and 0 deletions
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2
tests/common
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@ -444,6 +444,7 @@ prepare_test_dev()
[[ "$size" ]] || size='2G'
# Still truncate it to new size
if [ -n "$TEST_DEV" ]; then
truncate -s 0 "$TEST_DEV"
truncate -s "$size" "$TEST_DEV"
return;
fi
@ -452,6 +453,7 @@ prepare_test_dev()
"$RESULTS"
TEST_DEV="$TOP/tests/test.img"
truncate -s 0 "$TEST_DEV"
truncate -s "$size" "$TEST_DEV" || _not_run "create file for loop device failed"
}