Re: [PATCH v3 net-next 1/7] net: skb_drop_reason: add document for drop reasons

[Eric Dumazet]

On Thu, Feb 10, 2022 at 8:13 AM Jakub Kicinski <kuba@xxxxxxxxxx> wrote:
>
> On Thu, 10 Feb 2022 21:42:14 +0800 Menglong Dong wrote:
> > How about introducing a field to 'struct sock' for drop reasons? As sk is
> > locked during the packet process in tcp_v4_do_rcv(), this seems to work.
>
> I find adding temporary storage to persistent data structures awkward.
> You can put a structure on the stack and pass it thru the call chain,
> that's just my subjective preference, tho, others may have better ideas.

I had a similar TODO item, because stuff like 'waking up task' or free
one skb (or list of skb) could be performed outside of socket lock.