netdev - Re: [PATCH ipsec-next 4/5] xfrm: provide common xdo_dev_offload

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Message-ID: <647895d9-e8d1-4921-b5ba-b38b2176604e@linux.dev>
Date: Sun, 16 Feb 2025 10:33:59 +0100
From: Zhu Yanjun <yanjun.zhu@...ux.dev>
To: Leon Romanovsky <leon@...nel.org>,
 Steffen Klassert <steffen.klassert@...unet.com>
Cc: Leon Romanovsky <leonro@...dia.com>, Andrew Lunn <andrew+netdev@...n.ch>,
 Ayush Sawal <ayush.sawal@...lsio.com>, Bharat Bhushan
 <bbhushan2@...vell.com>, Eric Dumazet <edumazet@...gle.com>,
 Geetha sowjanya <gakula@...vell.com>, hariprasad <hkelam@...vell.com>,
 Herbert Xu <herbert@...dor.apana.org.au>, intel-wired-lan@...ts.osuosl.org,
 Jakub Kicinski <kuba@...nel.org>, Jay Vosburgh <jv@...sburgh.net>,
 Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
 linux-rdma@...r.kernel.org, Louis Peens <louis.peens@...igine.com>,
 netdev@...r.kernel.org, oss-drivers@...igine.com,
 Paolo Abeni <pabeni@...hat.com>, Potnuri Bharat Teja <bharat@...lsio.com>,
 Przemek Kitszel <przemyslaw.kitszel@...el.com>,
 Saeed Mahameed <saeedm@...dia.com>, Subbaraya Sundeep <sbhatta@...vell.com>,
 Sunil Goutham <sgoutham@...vell.com>, Tariq Toukan <tariqt@...dia.com>,
 Tony Nguyen <anthony.l.nguyen@...el.com>, Ilia Lin <ilia.lin@...nel.org>
Subject: Re: [PATCH ipsec-next 4/5] xfrm: provide common xdo_dev_offload_ok
 callback implementation

在 2025/2/5 19:20, Leon Romanovsky 写道:
> From: Leon Romanovsky <leonro@...dia.com>
> 
> Almost all drivers except bond and nsim had same check if device
> can perform XFRM offload on that specific packet. The check was that
> packet doesn't have IPv4 options and IPv6 extensions.
> 
> In NIC drivers, the IPv4 HELEN comparison was slightly different, but
> the intent was to check for the same conditions. So let's chose more
> strict variant as a common base.
> 
> Signed-off-by: Leon Romanovsky <leonro@...dia.com>
> ---
>   Documentation/networking/xfrm_device.rst      |  3 ++-
>   drivers/net/bonding/bond_main.c               | 16 +++++---------
>   .../net/ethernet/chelsio/cxgb4/cxgb4_main.c   | 21 -------------------
>   .../inline_crypto/ch_ipsec/chcr_ipsec.c       | 16 --------------
>   .../net/ethernet/intel/ixgbe/ixgbe_ipsec.c    | 21 -------------------
>   drivers/net/ethernet/intel/ixgbevf/ipsec.c    | 21 -------------------
>   .../marvell/octeontx2/nic/cn10k_ipsec.c       | 15 -------------
>   .../mellanox/mlx5/core/en_accel/ipsec.c       | 16 --------------
>   .../net/ethernet/netronome/nfp/crypto/ipsec.c | 11 ----------
>   drivers/net/netdevsim/ipsec.c                 | 11 ----------
>   drivers/net/netdevsim/netdevsim.h             |  1 -
>   net/xfrm/xfrm_device.c                        | 15 +++++++++++++
>   12 files changed, 22 insertions(+), 145 deletions(-)
> 
> diff --git a/Documentation/networking/xfrm_device.rst b/Documentation/networking/xfrm_device.rst
> index 66f6e9a9b59a..39bb98939d1f 100644
> --- a/Documentation/networking/xfrm_device.rst
> +++ b/Documentation/networking/xfrm_device.rst
> @@ -126,7 +126,8 @@ been setup for offload, it first calls into xdo_dev_offload_ok() with
>   the skb and the intended offload state to ask the driver if the offload
>   will serviceable.  This can check the packet information to be sure the
>   offload can be supported (e.g. IPv4 or IPv6, no IPv4 options, etc) and
> -return true of false to signify its support.
> +return true of false to signify its support. In case driver doesn't implement

In this commit, remove the functions cxgb4_ipsec_offload_ok, 
ch_ipsec_offload_ok, ixgbe_ipsec_offload_ok, ixgbevf_ipsec_offload_ok, 
cn10k_ipsec_offload_ok, mlx5e_ipsec_offload_ok, nfp_net_ipsec_offload_ok 
and nsim_ipsec_offload_ok, use the function xfrm_dev_offload_ok to do 
the same work.

But in the file xfrm_device.rst, "return true or false to signify its 
support"?

of --> should be "or"

Thanks a lot.
Reviewed-by: Zhu Yanjun <yanjun.zhu@...ux.dev>

Zhu Yanjun

> +this callback, the stack provides reasonable defaults.
>   
>   Crypto offload mode:
>   When ready to send, the driver needs to inspect the Tx packet for the
> diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
> index e45bba240cbc..bfb55c23380b 100644
> --- a/drivers/net/bonding/bond_main.c
> +++ b/drivers/net/bonding/bond_main.c
> @@ -676,22 +676,16 @@ static void bond_ipsec_free_sa(struct xfrm_state *xs)
>   static bool bond_ipsec_offload_ok(struct sk_buff *skb, struct xfrm_state *xs)