On Sat, Sep 16, 2023 at 04:09:14PM +0300, Arseniy Krasnov wrote:

Hello,

this patchset is first of three parts of another big patchset for
MSG_ZEROCOPY flag support:
https://lore.kernel.org/netdev/20230701063947.3422088-1-AVKrasnov@sberdevices.ru/ (local)

During review of this series, Stefano Garzarella [off-list ref]
suggested to split it for three parts to simplify review and merging:

1) virtio and vhost updates (for fragged skbs) <--- this patchset
2) AF_VSOCK updates (allows to enable MSG_ZEROCOPY mode and read
   tx completions) and update for Documentation/.
3) Updates for tests and utils.

This series enables handling of fragged skbs in virtio and vhost parts.
Newly logic won't be triggered, because SO_ZEROCOPY options is still
impossible to enable at this moment (next bunch of patches from big
set above will enable it).

Acked-by: Michael S. Tsirkin <mst@redhat.com>

I've included changelog to some patches anyway, because there were some
comments during review of last big patchset from the link above.

Head for this patchset is:
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next.git/commit/?id=f2fa1c812c91e99d0317d1fc7d845e1e05f39716

Link to v1:
https://lore.kernel.org/netdev/20230717210051.856388-1-AVKrasnov@sberdevices.ru/ (local)
Link to v2:
https://lore.kernel.org/netdev/20230718180237.3248179-1-AVKrasnov@sberdevices.ru/ (local)
Link to v3:
https://lore.kernel.org/netdev/20230720214245.457298-1-AVKrasnov@sberdevices.ru/ (local)
Link to v4:
https://lore.kernel.org/netdev/20230727222627.1895355-1-AVKrasnov@sberdevices.ru/ (local)
Link to v5:
https://lore.kernel.org/netdev/20230730085905.3420811-1-AVKrasnov@sberdevices.ru/ (local)
Link to v6:
https://lore.kernel.org/netdev/20230814212720.3679058-1-AVKrasnov@sberdevices.ru/ (local)
Link to v7:
https://lore.kernel.org/netdev/20230827085436.941183-1-avkrasnov@salutedevices.com/ (local)
Link to v8:
https://lore.kernel.org/netdev/20230911202234.1932024-1-avkrasnov@salutedevices.com/ (local)

Changelog:
 v3 -> v4:
 * Patchset rebased and tested on new HEAD of net-next (see hash above).
 v4 -> v5:
 * See per-patch changelog after ---.
 v5 -> v6:
 * Patchset rebased and tested on new HEAD of net-next (see hash above).
 * See per-patch changelog after ---.
 v6 -> v7:
 * Patchset rebased and tested on new HEAD of net-next (see hash above).
 * See per-patch changelog after ---.
 v7 -> v8:
 * Patchset rebased and tested on new HEAD of net-next (see hash above).
 * See per-patch changelog after ---.
 v8 -> v9:
 * Patchset rebased and tested on new HEAD of net-next (see hash above).
 * See per-patch changelog after ---.

Arseniy Krasnov (4):
  vsock/virtio/vhost: read data from non-linear skb
  vsock/virtio: support to send non-linear skb
  vsock/virtio: non-linear skb handling for tap
  vsock/virtio: MSG_ZEROCOPY flag support

 drivers/vhost/vsock.c                         |  14 +-
 include/linux/virtio_vsock.h                  |  10 +
 .../events/vsock_virtio_transport_common.h    |  12 +-
 net/vmw_vsock/virtio_transport.c              |  92 +++++-
 net/vmw_vsock/virtio_transport_common.c       | 307 ++++++++++++++----
 5 files changed, 348 insertions(+), 87 deletions(-)

-- 
2.25.1