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virtio-blk: reject configs with logical block size > physical block size

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virtio-blk logical block size should never be larger than physical block
size because it doesn't make sense to have such configurations. QEMU doesn't
have a way to effectively express this condition; the best it can do is
report the physical block exponent as 0 - indicating the logical block size
equals the physical block size.

This is identical to commit 3da023b582
but applied to virtio-blk (instead of virtio-scsi).

Signed-off-by: Mark Kanda <mark.kanda@oracle.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Ameya More <ameya.more@oracle.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Message-id: 773169891f9f2deb4cb7c4ef2655580dbe24c1d1.1513005190.git.mark.kanda@oracle.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Mark Kanda 2017-12-11 09:16:25 -06:00 committed by Stefan Hajnoczi
parent 6040aedddb
commit 0a75b60cdb
1 changed files with 7 additions and 0 deletions
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7
hw/block/virtio-blk.c
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@ -949,6 +949,13 @@ static void virtio_blk_device_realize(DeviceState *dev, Error **errp)
blkconf_blocksizes(&conf->conf);
if (conf->conf.logical_block_size >
conf->conf.physical_block_size) {
error_setg(errp,
"logical_block_size > physical_block_size not supported");
return;
}
virtio_init(vdev, "virtio-blk", VIRTIO_ID_BLOCK,
sizeof(struct virtio_blk_config));