net: add a new bind_add method

The SCTP protocol allows to bind multiple address to a socket.  That
feature is currently only exposed as a socket option.  Add a bind_add
method struct proto that allows to bind additional addresses, and
switch the dlm code to use the method instead of going through the
socket option from kernel space.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig
2020-05-29 14:09:42 +02:00
committed by David S. Miller
parent 05bfd36614
commit c0425a4249
4 changed files with 30 additions and 7 deletions

View File

@@ -3712,3 +3712,11 @@ bool sk_busy_loop_end(void *p, unsigned long start_time)
}
EXPORT_SYMBOL(sk_busy_loop_end);
#endif /* CONFIG_NET_RX_BUSY_POLL */
int sock_bind_add(struct sock *sk, struct sockaddr *addr, int addr_len)
{
if (!sk->sk_prot->bind_add)
return -EOPNOTSUPP;
return sk->sk_prot->bind_add(sk, addr, addr_len);
}
EXPORT_SYMBOL(sock_bind_add);