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https://github.com/kdave/btrfs-progs
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9996feb94d
Test case misc/021 is testing if we could mount a single disk btrfs image recovered from multi disk fs. The problem is, current kernel has extra check for block group, chunk and dev extent. This means no image can pass btrfs check for chunk tree and the filesystem will not mount. So do extra btrfs check before mount, this will also help us to locate the problem in btrfs-image easier. Reviewed-by: Nikolay Borisov <nborisov@suse.com> Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com>
54 lines
1.7 KiB
Bash
Executable File
54 lines
1.7 KiB
Bash
Executable File
#!/bin/bash
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# Test btrfs-image with multiple devices filesystem and verify that restoring
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# the created image works against a single device.
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source "$TEST_TOP/common"
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check_prereq btrfs-image
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check_prereq mkfs.btrfs
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check_prereq btrfs
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setup_root_helper
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rm -f dev1 dev2
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run_check truncate -s 2G dev1
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run_check truncate -s 2G dev2
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chmod a+w dev1 dev2
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loop1=$(run_check_stdout $SUDO_HELPER losetup --find --show dev1)
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loop2=$(run_check_stdout $SUDO_HELPER losetup --find --show dev2)
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# Create the test file system.
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run_check $SUDO_HELPER "$TOP/mkfs.btrfs" -f "$loop1" "$loop2"
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run_check $SUDO_HELPER mount "$loop1" "$TEST_MNT"
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run_check $SUDO_HELPER dd bs=1M count=1 if=/dev/zero of="$TEST_MNT/foobar"
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orig_md5=$(run_check_stdout md5sum "$TEST_MNT/foobar" | cut -d ' ' -f 1)
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run_check $SUDO_HELPER umount "$TEST_MNT"
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# Create the image to restore later.
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run_check $SUDO_HELPER "$TOP/btrfs-image" "$loop1" "$IMAGE"
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# Wipe out the filesystem from the devices, restore the image on a single
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# device, check everything works and file foobar is there and with 1Mb of
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# zeroes.
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run_check $SUDO_HELPER wipefs -a "$loop1"
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run_check $SUDO_HELPER wipefs -a "$loop2"
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run_check $SUDO_HELPER "$TOP/btrfs-image" -r "$IMAGE" "$loop1"
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# Run check to make sure there is nothing wrong for the recovered image
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run_check "$TOP/btrfs" check "$loop1"
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run_check $SUDO_HELPER mount "$loop1" "$TEST_MNT"
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new_md5=$(run_check_stdout md5sum "$TEST_MNT/foobar" | cut -d ' ' -f 1)
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run_check $SUDO_HELPER umount "$TEST_MNT"
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# Cleanup loop devices.
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run_check $SUDO_HELPER losetup -d "$loop1"
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run_check $SUDO_HELPER losetup -d "$loop2"
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rm -f dev1 dev2
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# Compare the file digests.
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[ "$orig_md5" == "$new_md5" ] || _fail "File digests do not match"
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