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[bpf-next,10/19] af_unix: implement ->sendmsg_locked for dgram socket

Message ID 20210203041636.38555-11-xiyou.wangcong@gmail.com (mailing list archive)
State Changes Requested
Delegated to: BPF
Headers show
Series sock_map: add non-TCP and cross-protocol support | expand

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netdev/cc_maintainers warning 15 maintainers not CCed: gustavoars@kernel.org songliubraving@fb.com pabeni@redhat.com orcohen2006@gmail.com andrii@kernel.org willemb@google.com tklauser@distanz.ch cai@lca.pw kpsingh@kernel.org ktkhai@virtuozzo.com davem@davemloft.net ast@kernel.org kuba@kernel.org kafai@fb.com yhs@fb.com
netdev/source_inline success Was 0 now: 0
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netdev/module_param success Was 0 now: 0
netdev/build_32bit fail Errors and warnings before: 9 this patch: 9
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netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 39 lines checked
netdev/build_allmodconfig_warn fail Errors and warnings before: 9 this patch: 9
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netdev/stable success Stable not CCed

Commit Message

Cong Wang Feb. 3, 2021, 4:16 a.m. UTC 
From: Cong Wang <cong.wang@bytedance.com>

We already have unix_dgram_sendmsg(), we can just build
its ->sendmsg_locked() on top of it.

Cc: John Fastabend <john.fastabend@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jakub Sitnicki <jakub@cloudflare.com>
Cc: Lorenz Bauer <lmb@cloudflare.com>
Signed-off-by: Cong Wang <cong.wang@bytedance.com>
---
 net/unix/af_unix.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)
diff mbox series

Patch

diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 41c3303c3357..4e1fa4ecbcfb 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -659,6 +659,7 @@  static ssize_t unix_stream_sendpage(struct socket *, struct page *, int offset,
 static ssize_t unix_stream_splice_read(struct socket *,  loff_t *ppos,
 				       struct pipe_inode_info *, size_t size,
 				       unsigned int flags);
+static int __unix_dgram_sendmsg(struct sock*, struct msghdr *, size_t);
 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_dgram_connect(struct socket *, struct sockaddr *,
@@ -738,6 +739,7 @@  static const struct proto_ops unix_dgram_ops = {
 	.listen =	sock_no_listen,
 	.shutdown =	unix_shutdown,
 	.sendmsg =	unix_dgram_sendmsg,
+	.sendmsg_locked = __unix_dgram_sendmsg,
 	.recvmsg =	unix_dgram_recvmsg,
 	.mmap =		sock_no_mmap,
 	.sendpage =	sock_no_sendpage,
@@ -1611,10 +1613,10 @@  static void scm_stat_del(struct sock *sk, struct sk_buff *skb)
  *	Send AF_UNIX data.
  */
 
-static int unix_dgram_sendmsg(struct socket *sock, struct msghdr *msg,
-			      size_t len)
+static int __unix_dgram_sendmsg(struct sock *sk, struct msghdr *msg,
+				size_t len)
 {
-	struct sock *sk = sock->sk;
+	struct socket *sock = sk->sk_socket;
 	struct net *net = sock_net(sk);
 	struct unix_sock *u = unix_sk(sk);
 	DECLARE_SOCKADDR(struct sockaddr_un *, sunaddr, msg->msg_name);
@@ -1814,6 +1816,12 @@  static int unix_dgram_sendmsg(struct socket *sock, struct msghdr *msg,
 	return err;
 }
 
+static int unix_dgram_sendmsg(struct socket *sock, struct msghdr *msg,
+			      size_t len)
+{
+	return __unix_dgram_sendmsg(sock->sk, msg, len);
+}
+
 /* We use paged skbs for stream sockets, and limit occupancy to 32768
  * bytes, and a minimum of a full page.
  */