netdev - Re: [RFC bpf-next v1 0/7] Add kfunc bpf_xdp_pull

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Message-ID: <afdc16b0-fd53-4d4c-b322-09d1a0d8cb86@linux.dev>
Date: Fri, 29 Aug 2025 11:21:45 -0700
From: Martin KaFai Lau <martin.lau@...ux.dev>
To: Nimrod Oren <noren@...dia.com>, Amery Hung <ameryhung@...il.com>
Cc: bpf@...r.kernel.org, netdev@...r.kernel.org,
 alexei.starovoitov@...il.com, andrii@...nel.org, daniel@...earbox.net,
 kuba@...nel.org, martin.lau@...nel.org, mohsin.bashr@...il.com,
 saeedm@...dia.com, tariqt@...dia.com, mbloch@...dia.com,
 maciej.fijalkowski@...el.com, kernel-team@...a.com,
 Dragos Tatulea <dtatulea@...dia.com>
Subject: Re: [RFC bpf-next v1 0/7] Add kfunc bpf_xdp_pull_data

On 8/28/25 6:39 AM, Nimrod Oren wrote:
> I'm currently working on a series that converts the xdp_native program
> to use dynptr for accessing header data. If accepted, it should provide
> better performance, since dynptr can access without copying the data.

The bpf_xdp_adjust_tail is aware of xdp_buff_has_frags. Is there a reason that 
bpf_xdp_adjust_head cannot handle frags also?