On Sun, 2011-05-08 at 04:48 +0100, Takeshi HASEGAWA wrote:
> I am working to support virtio-blk-pci device on Xen FV domain.
> This patch adds virtio-blk-pci support to libxl.
>
> New vbd type (252 << 8) is added.
> I borrow 252 from major number of linux virtio-blk frontend (vd).
> virtio-blk-pci does not use this type right now, but it should
> also work with Wei Liu's work.
>
>
> I have already seen virtio device on HVM domain with upstream-qemu,
> but there looks some issues when I/O occurs.
> (fdisk works, but qemu dies during mkfs)
> I am going to look into the problem.
>
> Any suggestions are welcome!
>
> Thanks,
> Takeshi
>
>
> Signed-off-by: Takeshi HASEGAWA <hasegaw@xxxxxxxxx>
>
> diff -r 4b0692880dfa docs/misc/vbd-interface.txt
> --- a/docs/misc/vbd-interface.txt Thu May 05 17:40:34 2011 +0100
> +++ b/docs/misc/vbd-interface.txt Sun May 08 12:46:00 2011 +0900
> @@ -73,6 +73,7 @@
>
> 1 << 28 | disk << 8 | partition xvd, disks or partitions 16 onwards
> 202 << 8 | disk << 4 | partition xvd, disks and partitions up to 15
> + 252 << 8 | disk << 4 | partition vd, disks and partitions up to 15
> 8 << 8 | disk << 4 | partition sd, disks and partitions up to 15
> 3 << 8 | disk << 6 | partition hd, disks 0..1, partitions 0..63
> 22 << 8 | (disk-2) << 6 | partition hd, disks 2..3, partitions 0..63
This file describes the the Xen PV block protocol, which is completely
orthogonal to the virtio one, so why is this needed?
> diff -r 4b0692880dfa tools/libxl/libxl_device.c
> --- a/tools/libxl/libxl_device.c Thu May 05 17:40:34 2011 +0100
> +++ b/tools/libxl/libxl_device.c Sun May 08 12:46:00 2011 +0900
> @@ -238,6 +238,13 @@
> if (pdisk) *pdisk = disk;
> if (ppartition) *ppartition = partition;
> return (8 << 8) | (disk << 4) | partition;
> + }
> + if (device_virtdisk_matches(virtpath, "vd",
> + &disk, 15,
> + &partition, 15)) {
> + if (pdisk) *pdisk = disk;
> + if (ppartition) *ppartition = partition;
> + return (252 << 8) | (disk << 4) | partition;
> }
> return -1;
> }
> diff -r 4b0692880dfa tools/libxl/libxl_dm.c
> --- a/tools/libxl/libxl_dm.c Thu May 05 17:40:34 2011 +0100
> +++ b/tools/libxl/libxl_dm.c Sun May 08 12:46:00 2011 +0900
> @@ -418,6 +418,10 @@
> if (strncmp(disks[i].vdev, "sd", 2) == 0)
> drive = libxl__sprintf
> (gc, "file=%s,if=scsi,bus=0,unit=%d,format=%s",
> + disks[i].pdev_path, disk, format);
> + else if (strncmp(disks[i].vdev, "vd", 2) == 0)
> + drive = libxl__sprintf
> + (gc, "file=%s,if=virtio,bus=0,unit=%d,format=%s",
> disks[i].pdev_path, disk, format);
> else if (disk < 4)
> drive = libxl__sprintf
>
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