[PATCH bpf-next v4 1/5] af_unix: add read_sock for stream socket types
From: Jiang Wang <hidden>
Date: 2021-08-05 05:14:05
Also in:
bpf, linux-kselftest, lkml
Subsystem:
networking [general], networking [unix sockets], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Kuniyuki Iwashima, Linus Torvalds
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 <redacted> Reviewed-by: Cong Wang <redacted> --- 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 256c4e31132e..c020ad0e8438 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,
@@ -2358,6 +2361,15 @@ 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