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Message-ID: <2ea0f9bd5d0dbc599d766b7b35df4132e904abc6.1759928725.git.asml.silence@gmail.com>
Date: Wed, 8 Oct 2025 14:12:54 +0100
From: Pavel Begunkov <asml.silence@...il.com>
To: io-uring@...r.kernel.org
Cc: asml.silence@...il.com,
netdev@...r.kernel.org,
Byungchul Park <byungchul@...com>
Subject: [PATCH io_uring for-review] io_uring/zcrx: convert to use netmem_desc
Convert zcrx to struct netmem_desc, and use struct net_iov::desc to
access its fields instead of struct net_iov inner union alises.
zcrx only directly reads niov->pp, so with this patch it doesn't depend
on the union anymore.
Signed-off-by: Pavel Begunkov <asml.silence@...il.com>
---
io_uring/zcrx.c | 12 +++++++-----
1 file changed, 7 insertions(+), 5 deletions(-)
diff --git a/io_uring/zcrx.c b/io_uring/zcrx.c
index 723e4266b91f..966ed95e801d 100644
--- a/io_uring/zcrx.c
+++ b/io_uring/zcrx.c
@@ -693,12 +693,12 @@ static void io_zcrx_return_niov(struct net_iov *niov)
{
netmem_ref netmem = net_iov_to_netmem(niov);
- if (!niov->pp) {
+ if (!niov->desc.pp) {
/* copy fallback allocated niovs */
io_zcrx_return_niov_freelist(niov);
return;
}
- page_pool_put_unrefed_netmem(niov->pp, netmem, -1, false);
+ page_pool_put_unrefed_netmem(niov->desc.pp, netmem, -1, false);
}
static void io_zcrx_scrub(struct io_zcrx_ifq *ifq)
@@ -800,7 +800,7 @@ static void io_zcrx_ring_refill(struct page_pool *pp,
if (!page_pool_unref_and_test(netmem))
continue;
- if (unlikely(niov->pp != pp)) {
+ if (unlikely(niov->desc.pp != pp)) {
io_zcrx_return_niov(niov);
continue;
}
@@ -1136,13 +1136,15 @@ static int io_zcrx_recv_frag(struct io_kiocb *req, struct io_zcrx_ifq *ifq,
const skb_frag_t *frag, int off, int len)
{
struct net_iov *niov;
+ struct page_pool *pp;
if (unlikely(!skb_frag_is_net_iov(frag)))
return io_zcrx_copy_frag(req, ifq, frag, off, len);
niov = netmem_to_net_iov(frag->netmem);
- if (!niov->pp || niov->pp->mp_ops != &io_uring_pp_zc_ops ||
- io_pp_to_ifq(niov->pp) != ifq)
+ pp = niov->desc.pp;
+
+ if (!pp || pp->mp_ops != &io_uring_pp_zc_ops || io_pp_to_ifq(pp) != ifq)
return -EFAULT;
if (!io_zcrx_queue_cqe(req, niov, ifq, off + skb_frag_off(frag), len))
--
2.49.0
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