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From: "Björn Töpel" <bjorn.topel@gmail.com>
To: netdev@vger.kernel.org, bpf@vger.kernel.org
Cc: "Björn Töpel" <bjorn.topel@intel.com>,
	magnus.karlsson@intel.com, ast@kernel.org, daniel@iogearbox.net,
	maciej.fijalkowski@intel.com, sridhar.samudrala@intel.com,
	jesse.brandeburg@intel.com, qi.z.zhang@intel.com,
	kuba@kernel.org, edumazet@google.com, jonathan.lemon@gmail.com,
	maximmi@nvidia.com
Subject: [PATCH bpf-next v3 03/10] xsk: add support for recvmsg()
Date: Thu, 19 Nov 2020 09:30:17 +0100	[thread overview]
Message-ID: <20201119083024.119566-4-bjorn.topel@gmail.com> (raw)
In-Reply-To: <20201119083024.119566-1-bjorn.topel@gmail.com>

From: Björn Töpel <bjorn.topel@intel.com>

Add support for non-blocking recvmsg() to XDP sockets. Previously,
only sendmsg() was supported by XDP socket. Now, for symmetry and the
upcoming busy-polling support, recvmsg() is added.

Signed-off-by: Björn Töpel <bjorn.topel@intel.com>
---
 net/xdp/xsk.c | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/net/xdp/xsk.c b/net/xdp/xsk.c
index b0141973f23e..56a52ec75696 100644
--- a/net/xdp/xsk.c
+++ b/net/xdp/xsk.c
@@ -531,6 +531,26 @@ static int xsk_sendmsg(struct socket *sock, struct msghdr *m, size_t total_len)
 	return __xsk_sendmsg(sk);
 }
 
+static int xsk_recvmsg(struct socket *sock, struct msghdr *m, size_t len, int flags)
+{
+	bool need_wait = !(flags & MSG_DONTWAIT);
+	struct sock *sk = sock->sk;
+	struct xdp_sock *xs = xdp_sk(sk);
+
+	if (unlikely(!(xs->dev->flags & IFF_UP)))
+		return -ENETDOWN;
+	if (unlikely(!xs->rx))
+		return -ENOBUFS;
+	if (unlikely(!xsk_is_bound(xs)))
+		return -ENXIO;
+	if (unlikely(need_wait))
+		return -EOPNOTSUPP;
+
+	if (xs->pool->cached_need_wakeup & XDP_WAKEUP_RX && xs->zc)
+		return xsk_wakeup(xs, XDP_WAKEUP_RX);
+	return 0;
+}
+
 static __poll_t xsk_poll(struct file *file, struct socket *sock,
 			     struct poll_table_struct *wait)
 {
@@ -1191,7 +1211,7 @@ static const struct proto_ops xsk_proto_ops = {
 	.setsockopt	= xsk_setsockopt,
 	.getsockopt	= xsk_getsockopt,
 	.sendmsg	= xsk_sendmsg,
-	.recvmsg	= sock_no_recvmsg,
+	.recvmsg	= xsk_recvmsg,
 	.mmap		= xsk_mmap,
 	.sendpage	= sock_no_sendpage,
 };
-- 
2.27.0


  parent reply	other threads:[~2020-11-19  8:31 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-19  8:30 [PATCH bpf-next v3 00/10] Introduce preferred busy-polling Björn Töpel
2020-11-19  8:30 ` [PATCH bpf-next v3 01/10] net: introduce " Björn Töpel
2020-11-24  0:04   ` Jakub Kicinski
2020-11-24  7:58     ` Björn Töpel
2020-11-24  0:11   ` Jakub Kicinski
2020-11-24  8:47     ` Björn Töpel
2020-11-24 16:21   ` Jakub Kicinski
2020-11-19  8:30 ` [PATCH bpf-next v3 02/10] net: add SO_BUSY_POLL_BUDGET socket option Björn Töpel
2020-11-24 16:21   ` Jakub Kicinski
2020-11-19  8:30 ` Björn Töpel [this message]
2020-11-25  6:55   ` [PATCH bpf-next v3 03/10] xsk: add support for recvmsg() Magnus Karlsson
2020-11-19  8:30 ` [PATCH bpf-next v3 04/10] xsk: check need wakeup flag in sendmsg() Björn Töpel
2020-11-25  7:16   ` Magnus Karlsson
2020-11-19  8:30 ` [PATCH bpf-next v3 05/10] xsk: add busy-poll support for {recv,send}msg() Björn Töpel
2020-11-25  7:58   ` Magnus Karlsson
2020-11-19  8:30 ` [PATCH bpf-next v3 06/10] xsk: propagate napi_id to XDP socket Rx path Björn Töpel
2020-11-25 14:47   ` Magnus Karlsson
2020-11-25 21:14   ` Michael S. Tsirkin
2021-09-29 18:33   ` kernel test robot
2021-09-30  6:04     ` Magnus Karlsson
2021-10-02  2:07       ` [kbuild-all] " Philip Li
2021-11-05 20:17   ` kernel test robot
2020-11-19  8:30 ` [PATCH bpf-next v3 07/10] samples/bpf: use recvfrom() in xdpsock/rxdrop Björn Töpel
2020-11-25  7:59   ` Magnus Karlsson
2020-11-19  8:30 ` [PATCH bpf-next v3 08/10] samples/bpf: use recvfrom() in xdpsock/l2fwd Björn Töpel
2020-11-25  8:00   ` Magnus Karlsson
2020-11-19  8:30 ` [PATCH bpf-next v3 09/10] samples/bpf: add busy-poll support to xdpsock Björn Töpel
2020-11-25  8:19   ` Magnus Karlsson
2020-11-19  8:30 ` [PATCH bpf-next v3 10/10] samples/bpf: add option to set the busy-poll budget Björn Töpel
2020-11-25  8:23   ` Magnus Karlsson
2020-11-23 13:31 ` [PATCH bpf-next v3 00/10] Introduce preferred busy-polling Björn Töpel
2020-11-23 23:54   ` Jakub Kicinski
2020-11-24  0:14 ` Jakub Kicinski

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