linux-kernel - Re: [PATCH net-next v9 0/4] vsock/virtio/vhost: MSG

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Date:   Mon, 18 Sep 2023 19:56:00 +0300
From:   Arseniy Krasnov <avkrasnov@...utedevices.com>
To:     Stefan Hajnoczi <stefanha@...hat.com>,
        Stefano Garzarella <sgarzare@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Jason Wang <jasowang@...hat.com>,
        Bobby Eshleman <bobby.eshleman@...edance.com>
CC:     <kvm@...r.kernel.org>, <virtualization@...ts.linux-foundation.org>,
        <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <kernel@...rdevices.ru>, <oxffffaa@...il.com>
Subject: Re: [PATCH net-next v9 0/4] vsock/virtio/vhost: MSG_ZEROCOPY
 preparations

Hi Stefano,

thanks for review! So when this patchset will be merged to net-next,
I'll start sending next part of MSG_ZEROCOPY patchset, e.g. AF_VSOCK +
Documentation/ patches.

Thanks, Arseniy

On 16.09.2023 16:09, 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/
> 
> During review of this series, Stefano Garzarella <sgarzare@...hat.com>
> 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).
> 
> 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/
> Link to v2:
> https://lore.kernel.org/netdev/20230718180237.3248179-1-AVKrasnov@sberdevices.ru/
> Link to v3:
> https://lore.kernel.org/netdev/20230720214245.457298-1-AVKrasnov@sberdevices.ru/
> Link to v4:
> https://lore.kernel.org/netdev/20230727222627.1895355-1-AVKrasnov@sberdevices.ru/
> Link to v5:
> https://lore.kernel.org/netdev/20230730085905.3420811-1-AVKrasnov@sberdevices.ru/
> Link to v6:
> https://lore.kernel.org/netdev/20230814212720.3679058-1-AVKrasnov@sberdevices.ru/
> Link to v7:
> https://lore.kernel.org/netdev/20230827085436.941183-1-avkrasnov@salutedevices.com/
> Link to v8:
> https://lore.kernel.org/netdev/20230911202234.1932024-1-avkrasnov@salutedevices.com/
> 
> 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(-)
>