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Subject: Re: [virtio] [OASIS Issue Tracker] Created: (VIRTIO-10) Allow arbitrary descriptor layouts / message framing.
Rusty Russell <rusty@au1.ibm.com> writes: > OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org> writes: > >> Allow arbitrary descriptor layouts / message framing. >> ----------------------------------------------------- >> >> Key: VIRTIO-10 >> URL: http://tools.oasis-open.org/issues/browse/VIRTIO-10 >> Project: OASIS Virtual I/O Device (VIRTIO) TC >> Issue Type: Improvement >> Reporter: Rusty Russell >> >> >> This will require a change in virtio_blk's SCSI commands, which requires framing cues. > > This it it on top of virtio-18 (which removes the virtio_blk SCSI > commands): On top of that, another change is required in block section: commit e1073b518165308836391738f2cf8d8ba1ca37e0 Author: Rusty Russell <rusty@au1.ibm.com> Date: Wed Sep 11 13:30:47 2013 +0930 2.4.2.5 Move block device header layout advice to legacy section. A continuation of bug virtio-10. Signed-off-by: Rusty Russell <rusty@au1.ibm.com> diff --git a/virtio-v1.0-wd01-part1-specification.txt b/virtio-v1.0-wd01-part1-specification.txt index 5350910..6ab1feb 100644 --- a/virtio-v1.0-wd01-part1-specification.txt +++ b/virtio-v1.0-wd01-part1-specification.txt @@ -1698,12 +1698,12 @@ error or VIRTIO_BLK_S_UNSUPP for a request unsupported by host: #define VIRTIO_BLK_S_IOERR 1 #define VIRTIO_BLK_S_UNSUPP 2 +2.4.2.5.1 Legacy Interface: Device Operation +------------------------ Historically, devices assumed that the fields type, ioprio and sector reside in a single, separate read-only buffer and the status field is a separate read-only buffer of size 1 byte, by itself. -2.4.2.5.1 Legacy Interface: Device Operation ------------------------- If the device has VIRTIO_BLK_F_SCSI feature, it can also support scsi packet command requests, each of these requests is of form:
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