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Message-ID: <36f7f017-ecea-4715-b352-2ce1d43c8cab@linux.dev>
Date: Wed, 13 Dec 2023 16:02:24 -0800
From: Martin KaFai Lau <martin.lau@...ux.dev>
To: Daniel Xu <dxu@...uu.xyz>
Cc: linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
bpf@...r.kernel.org, devel@...ux-ipsec.org, daniel@...earbox.net,
davem@...emloft.net, edumazet@...gle.com,
Herbert Xu <herbert@...dor.apana.org.au>, ast@...nel.org,
john.fastabend@...il.com, kuba@...nel.org, steffen.klassert@...unet.com,
pabeni@...hat.com, hawk@...nel.org, antony.antony@...unet.com,
alexei.starovoitov@...il.com, yonghong.song@...ux.dev, eddyz87@...il.com,
eyal.birger@...il.com
Subject: Re: [PATCH bpf-next v5 1/9] bpf: xfrm: Add bpf_xdp_get_xfrm_state()
kfunc
On 12/11/23 12:20 PM, Daniel Xu wrote:
> +/* bpf_xfrm_state_opts - Options for XFRM state lookup helpers
> + *
> + * Members:
> + * @error - Out parameter, set for any errors encountered
> + * Values:
> + * -EINVAL - netns_id is less than -1
> + * -EINVAL - opts__sz isn't BPF_XFRM_STATE_OPTS_SZ
> + * -ENONET - No network namespace found for netns_id
> + * @netns_id - Specify the network namespace for lookup
> + * Values:
> + * BPF_F_CURRENT_NETNS (-1)
> + * Use namespace associated with ctx
> + * [0, S32_MAX]
> + * Network Namespace ID
> + * @mark - XFRM mark to match on
> + * @daddr - Destination address to match on
> + * @spi - Security parameter index to match on
> + * @proto - L3 protocol to match on
> + * @family - L3 protocol family to match on
> + */
> +struct bpf_xfrm_state_opts {
> + s32 error;
> + s32 netns_id;
> + u32 mark;
> + xfrm_address_t daddr;
> + __be32 spi;
> + u8 proto;
> + u16 family;
> +};
> +
> +enum {
> + BPF_XFRM_STATE_OPTS_SZ = sizeof(struct bpf_xfrm_state_opts),
The bpf prog can use the bpf_core_type_size() to figure out the size also.
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