add write support to virtio-blk

Windows XP does write to sector 0 during installation and prints
mysterious error if write fails. Interestingly if write drops data,
but returns OK to Windows installer installation proceed without
complains and completes successfully.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
1 file changed
tree: 4f3f576d228de25deafb26b1eb4fac9f0659fb20
  1. .gitignore
  2. COPYING
  3. COPYING.LESSER
  4. Makefile
  5. README
  6. TODO
  7. src/
  8. tools/
  9. vgasrc/