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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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