mirror of
https://github.com/mii443/qemu.git
synced 2025-09-01 14:49:23 +00:00
0eb2baeb44
Passed-through SCSI devices can be opened with the readonly=on option. When this happens, Linux filters away write commands so that the guest cannot overwrite the contents of the device. However, the guest does not know that the device is read-only, and accepts writes. The writes only fail later when the page cache is flushed. This patch modifies scsi-generic to modify the MODE SENSE data and set the read-only bit in the device-specific parameters, so that the guest OS treats the disk as write protected. Reviewed-by: Fam Zheng <famz@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>