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authorKevin Wolf <kwolf@redhat.com>2011-10-13 15:42:52 +0200
committerKevin Wolf <kwolf@redhat.com>2011-10-14 10:29:13 +0200
commitb161e2e4b32ac8fb9e6a891eba3da0b825b5d046 (patch)
tree6fce6aa203716a01110062b1563fc82074a2bb66 /qemu-tech.texi
parent1a6e115b19b0d3831d63bbacb843722070e6674c (diff)
linux-aio: Allow reads beyond the end of growable images
This is the linux-aio version of commits 22afa7b5 (raw-posix, synchronous) and ba1d1afd (posix-aio-compat). Reads now produce zeros after the end of file instead of failing or resulting in short reads, making linux-aio compatible with the behaviour of synchronous raw-posix requests and posix-aio-compat. The problem can be reproduced like this: dd if=/dev/zero of=/tmp/test.raw bs=1 count=1234 ./qemu-io -k -n -g -c 'read -p 1024 512' /tmp/test.raw Previously, the result of this was 'read failed: Invalid argument', now the read completes successfully. Signed-off-by: Kevin Wolf <kwolf@redhat.com> Reviewed-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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