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From: Jiang Wang <jiang.wang@bytedance.com>
To: netdev@vger.kernel.org
Cc: cong.wang@bytedance.com, duanxiongchun@bytedance.com,
	xieyongji@bytedance.com, chaiwen.cc@bytedance.com,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>,
	John Fastabend <john.fastabend@gmail.com>,
	Daniel Borkmann <daniel@iogearbox.net>,
	Jakub Sitnicki <jakub@cloudflare.com>,
	Lorenz Bauer <lmb@cloudflare.com>,
	Alexei Starovoitov <ast@kernel.org>,
	Andrii Nakryiko <andrii@kernel.org>,
	Martin KaFai Lau <kafai@fb.com>, Song Liu <songliubraving@fb.com>,
	Yonghong Song <yhs@fb.com>, KP Singh <kpsingh@kernel.org>,
	Shuah Khan <shuah@kernel.org>,
	Johan Almbladh <johan.almbladh@anyfinetworks.com>,
	linux-kernel@vger.kernel.org, bpf@vger.kernel.org,
	linux-kselftest@vger.kernel.org
Subject: [PATCH bpf-next v2 1/5] af_unix: add read_sock for stream socket types
Date: Thu, 29 Jul 2021 21:23:57 +0000	[thread overview]
Message-ID: <20210729212402.1043211-2-jiang.wang@bytedance.com> (raw)
In-Reply-To: <20210729212402.1043211-1-jiang.wang@bytedance.com>

To support sockmap for af_unix stream type, implement
read_sock, which is similar to the read_sock for unix
dgram sockets.

Signed-off-by: Jiang Wang <jiang.wang@bytedance.com>
Reviewed-by: Cong Wang <cong.wang@bytedance.com>
---
 net/unix/af_unix.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 89927678c..0ae3fc4c8 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -672,6 +672,8 @@ static int unix_dgram_sendmsg(struct socket *, struct msghdr *, size_t);
 static int unix_dgram_recvmsg(struct socket *, struct msghdr *, size_t, int);
 static int unix_read_sock(struct sock *sk, read_descriptor_t *desc,
 			  sk_read_actor_t recv_actor);
+static int unix_stream_read_sock(struct sock *sk, read_descriptor_t *desc,
+				 sk_read_actor_t recv_actor);
 static int unix_dgram_connect(struct socket *, struct sockaddr *,
 			      int, int);
 static int unix_seqpacket_sendmsg(struct socket *, struct msghdr *, size_t);
@@ -725,6 +727,7 @@ static const struct proto_ops unix_stream_ops = {
 	.shutdown =	unix_shutdown,
 	.sendmsg =	unix_stream_sendmsg,
 	.recvmsg =	unix_stream_recvmsg,
+	.read_sock =	unix_stream_read_sock,
 	.mmap =		sock_no_mmap,
 	.sendpage =	unix_stream_sendpage,
 	.splice_read =	unix_stream_splice_read,
@@ -2311,6 +2314,15 @@ struct unix_stream_read_state {
 	unsigned int splice_flags;
 };
 
+static int unix_stream_read_sock(struct sock *sk, read_descriptor_t *desc,
+				 sk_read_actor_t recv_actor)
+{
+	if (unlikely(sk->sk_state != TCP_ESTABLISHED))
+		return -ENOTCONN;
+
+	return unix_read_sock(sk, desc, recv_actor);
+}
+
 static int unix_stream_read_generic(struct unix_stream_read_state *state,
 				    bool freezable)
 {
-- 
2.20.1


  reply	other threads:[~2021-07-29 21:24 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-29 21:23 [PATCH bpf-next v2 0/5] sockmap: add sockmap support for unix stream socket Jiang Wang
2021-07-29 21:23 ` Jiang Wang [this message]
2021-07-29 21:23 ` [PATCH bpf-next v2 2/5] af_unix: add unix_stream_proto for sockmap Jiang Wang
2021-07-30 14:13   ` Jakub Sitnicki
2021-07-31 18:23     ` Cong Wang
2021-07-29 21:23 ` [PATCH bpf-next v2 3/5] selftest/bpf: add tests for sockmap with unix stream type Jiang Wang
2021-07-29 21:24 ` [PATCH bpf-next v2 4/5] selftest/bpf: change udp to inet in some function names Jiang Wang
2021-07-29 21:24 ` [PATCH bpf-next v2 5/5] selftest/bpf: add new tests in sockmap for unix stream to tcp Jiang Wang

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