From: Nicholas Bellinger <nab@xxxxxxxxxxxxxxx> Hi MST & Paolo, The series adds initial vhost/scsi ANY_LAYOUT layout support. It assumes request/CDB and response/sense_buffer headers may span more than a single iovec using lib/iovec.c logic, along with a new addition of memcpy_fromiovec_out() to return the current re-calcuated **iov_out. This is currently done using a new vhost_scsi_handle_vqal() callback, and doesn't modify behavior of existing !ANY_LAYOUT code. It also allows virtio-scsi headers + T10_PI + Data SGL payloads to span the same iovec when pinning user-space memory via get_user_pages_fast() code. (Not tested yet) So far it's functioning against v3.19-rc1 virtio-scsi LLD code, with a layout of header -> T10_PI -> Data SGL payload in seperate iovecs and VIRTIO_F_ANY_LAYOUT + VIRTIO_F_VERSION_1 guest feature bits. Please review. Thank you, --nab Nicholas Bellinger (8): lib/iovec: Add memcpy_fromiovec_out library function vhost/scsi: Convert completion path to use memcpy_toiovecend vhost/scsi: Fix incorrect early vhost_scsi_handle_vq failures vhost/scsi: Change vhost_scsi_map_to_sgl to accept iov ptr + len vhost/scsi: Add common vhost_scsi_queue_desc code vhost/scsi: Add ANY_LAYOUT prerequisites vhost/scsi: Add ANY_LAYOUT support vhost/scsi: Set VIRTIO_F_ANY_LAYOUT + VIRTIO_F_VERSION_1 feature bits drivers/vhost/scsi.c | 512 ++++++++++++++++++++++++++++++++++++++++++++------- include/linux/uio.h | 2 + lib/iovec.c | 27 +++ 3 files changed, 476 insertions(+), 65 deletions(-) -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
