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Subject: Re: [virtio-comment] virtio_blk_req.data size - Section 5.2.6 - version 1.1 draft 01
On Tue, Mar 05, 2019 at 04:18:10PM +0000, Savir, Gil wrote: > In version 1.1 draft 01 - Section 5.2.6 - struct virtio_blk_req definition: > > Data field is defined as array of 512 Byte entries as follows: > u8 data[][512]; > It makes sense for IN and OUT requests, since defined for read/write sizes that are 512 Bytes multiplication. > However, it is confusing when used for DISCARD or WRITE_ZEROES requests, since virtio_blk_discard_write_zeroes struct size is 16 Bytes. > > Is implying that DISCARD and WRITE_ZEROES requests must use data-field sizes that are 512 Bytes multiplication as well? > > If yes, than the device can't tell how many virtio_blk_discard_write_zeroes structs reside within data-field. In that case - indication for number of virtio_blk_discard_write_zeroes structs needs to be added. > > If not, then I suggest to add to the spec clarification, that for DISCARD or WRITE_ZEROES requests, data-field is not required to be with size that is 512 Bytes multiplication. > > > Thanks, > Gil > Thanks for the report. I think this was resolved as part of resolution of https://github.com/oasis-tcs/virtio-spec/issues/34 > --------------------------------------------------------------------- > Intel Israel (74) Limited > > This e-mail and any attachments may contain confidential material for > the sole use of the intended recipient(s). Any review or distribution > by others is strictly prohibited. If you are not the intended > recipient, please contact the sender and delete all copies. > > > This publicly archived list offers a means to provide input to the > OASIS Virtual I/O Device (VIRTIO) TC. > > In order to verify user consent to the Feedback License terms and > to minimize spam in the list archive, subscription is required > before posting. > > Subscribe: virtio-comment-subscribe@lists.oasis-open.org > Unsubscribe: virtio-comment-unsubscribe@lists.oasis-open.org > List help: virtio-comment-help@lists.oasis-open.org > List archive: https://lists.oasis-open.org/archives/virtio-comment/ > Feedback License: https://www.oasis-open.org/who/ipr/feedback_license.pdf > List Guidelines: https://www.oasis-open.org/policies-guidelines/mailing-lists > Committee: https://www.oasis-open.org/committees/virtio/ > Join OASIS: https://www.oasis-open.org/join/
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