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mirror: Fix qiov size for short requests

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When mirroring an image of a size that is not a multiple of the
mirror job granularity, the last request would have the right nb_sectors
argument, but a qiov that is rounded up to the next multiple of the
granularity. Don't do this.

This fixes a segfault that is caused by raw-posix being confused by this
and allocating a buffer with request length, but operating on it with
qiov length.

[s/Driver/Drive/ in qemu-iotests 041 as suggested by Eric
--Stefan]

Reported-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Tested-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Kevin Wolf 2014-07-01 16:52:21 +02:00 • committed by Stefan Hajnoczi
parent bc3a7f90ff
commit 5a0f6fd5c8
3 changed files with 10 additions and 3 deletions
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5
tests/qemu-iotests/041
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@ -217,6 +217,11 @@ class TestSingleDriveZeroLength(TestSingleDrive):
test_small_buffer2 = None
test_large_cluster = None
class TestSingleDriveUnalignedLength(TestSingleDrive):
image_len = 1025 * 1024
test_small_buffer2 = None
test_large_cluster = None
class TestMirrorNoBacking(ImageMirroringTestCase):
image_len = 2 * 1024 * 1024 # MB