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| author | Paolo Abeni <pabeni@redhat.com> | 2023-08-11 17:57:19 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-08-14 07:06:13 +0100 |
| commit | 71a9a874cd6beb074896519f762741fbc448f5be (patch) | |
| tree | 9b8154435074f24d2192f694b74772e6eb6b23de /net/ipv4 | |
| parent | 8cf2ebdc0078a841fd54fcd50574bae1ae910d94 (diff) | |
| download | linux-stable-71a9a874cd6beb074896519f762741fbc448f5be.tar.gz linux-stable-71a9a874cd6beb074896519f762741fbc448f5be.tar.bz2 linux-stable-71a9a874cd6beb074896519f762741fbc448f5be.zip | |
net: factor out __inet_listen_sk() helper
The mptcp protocol maintains an additional socket just to easily
invoke a few stream operations on the first subflow. One of them
is inet_listen().
Factor out an helper operating directly on the (locked) struct sock,
to allow get rid of the above dependency in the next patch without
duplicating the existing code.
No functional changes intended.
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Acked-by: Mat Martineau <martineau@kernel.org>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/af_inet.c | 38 |
1 files changed, 22 insertions, 16 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c index 2fd23437c1d2..c59da65f19d2 100644 --- a/net/ipv4/af_inet.c +++ b/net/ipv4/af_inet.c @@ -187,24 +187,13 @@ static int inet_autobind(struct sock *sk) return 0; } -/* - * Move a socket into listening state. - */ -int inet_listen(struct socket *sock, int backlog) +int __inet_listen_sk(struct sock *sk, int backlog) { - struct sock *sk = sock->sk; - unsigned char old_state; + unsigned char old_state = sk->sk_state; int err, tcp_fastopen; - lock_sock(sk); - - err = -EINVAL; - if (sock->state != SS_UNCONNECTED || sock->type != SOCK_STREAM) - goto out; - - old_state = sk->sk_state; if (!((1 << old_state) & (TCPF_CLOSE | TCPF_LISTEN))) - goto out; + return -EINVAL; WRITE_ONCE(sk->sk_max_ack_backlog, backlog); /* Really, if the socket is already in listen state @@ -227,10 +216,27 @@ int inet_listen(struct socket *sock, int backlog) err = inet_csk_listen_start(sk); if (err) - goto out; + return err; + tcp_call_bpf(sk, BPF_SOCK_OPS_TCP_LISTEN_CB, 0, NULL); } - err = 0; + return 0; +} + +/* + * Move a socket into listening state. + */ +int inet_listen(struct socket *sock, int backlog) +{ + struct sock *sk = sock->sk; + int err = -EINVAL; + + lock_sock(sk); + + if (sock->state != SS_UNCONNECTED || sock->type != SOCK_STREAM) + goto out; + + err = __inet_listen_sk(sk, backlog); out: release_sock(sk); |