From e467cde238184d1b0923db2cd61ae1c5a6dc15aa Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Mon, 22 Oct 2007 11:03:38 +1000 Subject: Block driver using virtio. The block driver uses scatter-gather lists with sg[0] being the request information (struct virtio_blk_outhdr) with the type, sector and inbuf id. The next N sg entries are the bio itself, then the last sg is the status byte. Whether the N entries are in or out depends on whether it's a read or a write. We accept the normal (SCSI) ioctls: they get handed through to the other side which can then handle it or reply that it's unsupported. It's not clear that this actually works in general, since I don't know if blk_pc_request() requests have an accurate rq_data_dir(). Although we try to reply -ENOTTY on unsupported commands, ioctl(fd, CDROMEJECT) returns success to userspace. This needs a separate patch. Signed-off-by: Rusty Russell Cc: Jens Axboe --- drivers/block/Makefile | 1 + 1 file changed, 1 insertion(+) (limited to 'drivers/block/Makefile') diff --git a/drivers/block/Makefile b/drivers/block/Makefile index 014e72121b5..d199eba7a08 100644 --- a/drivers/block/Makefile +++ b/drivers/block/Makefile @@ -25,6 +25,7 @@ obj-$(CONFIG_SUNVDC) += sunvdc.o obj-$(CONFIG_BLK_DEV_UMEM) += umem.o obj-$(CONFIG_BLK_DEV_NBD) += nbd.o obj-$(CONFIG_BLK_DEV_CRYPTOLOOP) += cryptoloop.o +obj-$(CONFIG_VIRTIO_BLK) += virtio_blk.o obj-$(CONFIG_VIODASD) += viodasd.o obj-$(CONFIG_BLK_DEV_SX8) += sx8.o -- cgit v1.2.3