netdev - Re: [PATCH net-next v11 14/21] io_uring/zcrx: implement zerocopy receive pp memory provider

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Message-ID: <20250116180723.21a4e637@kernel.org>
Date: Thu, 16 Jan 2025 18:07:23 -0800
From: Jakub Kicinski <kuba@...nel.org>
To: David Wei <dw@...idwei.uk>
Cc: io-uring@...r.kernel.org, netdev@...r.kernel.org, Jens Axboe
 <axboe@...nel.dk>, Pavel Begunkov <asml.silence@...il.com>, Paolo Abeni
 <pabeni@...hat.com>, "David S. Miller" <davem@...emloft.net>, Eric Dumazet
 <edumazet@...gle.com>, Jesper Dangaard Brouer <hawk@...nel.org>, David
 Ahern <dsahern@...nel.org>, Mina Almasry <almasrymina@...gle.com>,
 Stanislav Fomichev <stfomichev@...il.com>, Joe Damato <jdamato@...tly.com>,
 Pedro Tammela <pctammela@...atatu.com>
Subject: Re: [PATCH net-next v11 14/21] io_uring/zcrx: implement zerocopy
 receive pp memory provider

On Thu, 16 Jan 2025 15:16:56 -0800 David Wei wrote:
> +	type = rxq ? NETDEV_A_QUEUE_IO_URING : NETDEV_A_PAGE_POOL_IO_URING;
> +	nest = nla_nest_start(rsp, type);
> +	nla_nest_end(rsp, nest);

nla_nest_start() can fail, you should return -EMSGSIZE if it does