I hacked nbdcopy to ignore block alignment (the error actually comes
from libnbd refusing to send the unaligned request, not from
qemu-nbd), and indeed qemu-nbd accepts the unaligned request without
complaint.
Eric - maybe having some flag for nbdcopy to ignore unaligned requests
when we know the server doesn't care (qemu-nbd) would work?
Rich.
--- a/copy/nbd-ops.c
+++ b/copy/nbd-ops.c
@@ -59,6 +59,10 @@ open_one_nbd_handle (struct rw_nbd *rwn)
exit (EXIT_FAILURE);
}
+ uint32_t sm = nbd_get_strict_mode (nbd);
+ sm &= ~LIBNBD_STRICT_ALIGN;
+ nbd_set_strict_mode (nbd, sm);
+
nbd_set_debug (nbd, verbose);
if (extents && rwn->d == READING &&
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
Read my programming and virtualization blog: http://rwmj.wordpress.com
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