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qemu-img: add skip option to dd

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This adds the skip option which allows qemu-img dd to skip a number of blocks
before copying the input.

A test case was added to test the skip option.

Signed-off-by: Reda Sallahi <fullmanet@gmail.com>
Message-id: 20160810141609.32727-1-fullmanet@gmail.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Reda Sallahi 2016-08-10 16:16:09 +02:00 • committed by Max Reitz
parent 86ce1f6e2b
commit f7c1553388
6 changed files with 174 additions and 8 deletions
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51
tests/qemu-iotests/160.out Normal file
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QA output created by 160
== Creating image ==
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
No errors were found on the image.
wrote 524288/524288 bytes at offset 24
512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
== Converting the image with dd with skip=1 ==
No errors were found on the image.
== Compare the images with qemu-img compare ==
Images are identical.
== Creating image ==
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
No errors were found on the image.
wrote 524288/524288 bytes at offset 24
512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
== Converting the image with dd with skip=2 ==
No errors were found on the image.
== Compare the images with qemu-img compare ==
Images are identical.
== Creating image ==
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
No errors were found on the image.
wrote 524288/524288 bytes at offset 24
512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
== Converting the image with dd with skip=30 ==
No errors were found on the image.
== Compare the images with qemu-img compare ==
Images are identical.
== Creating image ==
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1048576
No errors were found on the image.
wrote 524288/524288 bytes at offset 24
512 KiB, X ops; XX:XX:XX.X (XXX YYY/sec and XXX ops/sec)
== Converting the image with dd with skip=30K ==
No errors were found on the image.
== Compare the images with qemu-img compare ==
Images are identical.
*** done