Messages in this thread Patch in this message |  | | From | Jiang Wang <> | Subject | [PATCH bpf-next v1 1/5] af_unix: add read_sock for stream socket types | Date | Tue, 27 Jul 2021 00:12:48 +0000 |
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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..32eeb4a6a 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 -EINVAL; + + 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
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