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btrfs-progs: tests: fix misc/021 when restoring overlapping stale data 

As misc-tests/021 image dump is restored on the same original loop
device, this overlaps with the stale data and makes the test pass
falsely.

Fix this by using a new device for restore.

And also, the btrfs-image dump and restore doesn't restore the file
data, so any read on the files should be avoided. So instead of file
data use file stat data for the checksum.

Reported-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Anand Jain 2019-09-04 21:29:47 +08:00 committed by David Sterba
parent 0e7d891a15
commit 3de68a0e87
1 changed files with 7 additions and 6 deletions
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13
tests/misc-tests/021-image-multi-devices/test.sh
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@ -10,17 +10,18 @@ check_prereq btrfs
setup_root_helper
setup_loopdevs 2
setup_loopdevs 3
prepare_loopdevs
loop1=${loopdevs[1]}
loop2=${loopdevs[2]}
loop3=${loopdevs[3]}
# Create the test file system.
run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f "$loop1" "$loop2"
run_check $SUDO_HELPER mount "$loop1" "$TEST_MNT"
run_check $SUDO_HELPER dd bs=1M count=1 if=/dev/zero of="$TEST_MNT/foobar"
orig_md5=$(run_check_stdout md5sum "$TEST_MNT/foobar" | cut -d ' ' -f 1)
orig_md5=$(run_check_stdout stat "$TEST_MNT/foobar" | md5sum | cut -d ' ' -f 1)
run_check $SUDO_HELPER umount "$TEST_MNT"
# Create the image to restore later.
@ -32,13 +33,13 @@ run_check $SUDO_HELPER "$TOP/btrfs-image" "$loop1" "$IMAGE"
run_check $SUDO_HELPER wipefs -a "$loop1"
run_check $SUDO_HELPER wipefs -a "$loop2"
run_check $SUDO_HELPER "$TOP/btrfs-image" -r "$IMAGE" "$loop1"
run_check $SUDO_HELPER "$TOP/btrfs-image" -r "$IMAGE" "$loop3"
# Run check to make sure there is nothing wrong for the recovered image
run_check $SUDO_HELPER "$TOP/btrfs" check "$loop1"
run_check $SUDO_HELPER "$TOP/btrfs" check "$loop3"
run_check $SUDO_HELPER mount "$loop1" "$TEST_MNT"
new_md5=$(run_check_stdout md5sum "$TEST_MNT/foobar" | cut -d ' ' -f 1)
run_check $SUDO_HELPER mount "$loop3" "$TEST_MNT"
new_md5=$(run_check_stdout stat "$TEST_MNT/foobar" | md5sum | cut -d ' ' -f 1)
run_check $SUDO_HELPER umount "$TEST_MNT"
cleanup_loopdevs