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net: add a new bind_add method

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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
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6
include/net/sock.h
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@@ -1156,7 +1156,9 @@ struct proto {
int (*sendpage)(struct sock *sk, struct page *page,
int offset, size_t size, int flags);
int (*bind)(struct sock *sk,
struct sockaddr *uaddr, int addr_len);
struct sockaddr *addr, int addr_len);
int (*bind_add)(struct sock *sk,
struct sockaddr *addr, int addr_len);
int (*backlog_rcv) (struct sock *sk,
struct sk_buff *skb);
@@ -2698,4 +2700,6 @@ void sock_set_reuseaddr(struct sock *sk);
void sock_set_reuseport(struct sock *sk);
void sock_set_sndtimeo(struct sock *sk, s64 secs);
int sock_bind_add(struct sock *sk, struct sockaddr *addr, int addr_len);
#endif /* _SOCK_H */