On Feb 11, Jakub Kicinski wrote:
> On Fri, 11 Feb 2022 02:20:31 +0100 Lorenzo Bianconi wrote:
> > + if (skb_shared(skb) || skb_head_is_locked(skb)) {
>
> Is this sufficient to guarantee that the frags can be written?
> skb_cow_data() tells a different story.
Do you mean to consider paged part of the skb always not writable, right?
In other words, we should check something like:
if (skb_shared(skb) || skb_head_is_locked(skb) ||
skb_shinfo(skb)->nr_frags) {
...
}
Regards,
Lorenzo
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