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block: round up file size to nearest sector

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Currently the file size requested by user is rounded down to nearest
sector, causing the actual file size could be a bit less than the size
user requested. Since some formats (like qcow2) record virtual disk
size in bytes, this can make the last few bytes cannot be accessed.

This patch fixes it by rounding up file size to nearest sector so that
the actual file size is no less than the requested file size.

Signed-off-by: Hu Tao <hutao@cn.fujitsu.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Hu Tao 2014-09-10 17:05:45 +08:00 • committed by Kevin Wolf
parent be2bfb9dbd
commit c2eb918e32
21 changed files with 127 additions and 23 deletions
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12
tests/qemu-iotests/104.out Normal file
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QA output created by 104
=== Check qemu-img info output ===
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1024
image: TEST_DIR/t.IMGFMT
file format: IMGFMT
virtual size: 1.0K (1024 bytes)
Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1234
image: TEST_DIR/t.IMGFMT
file format: IMGFMT
virtual size: 1.5K (1536 bytes)
***done