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net: add sock_set_sndtimeo

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Add a helper to directly set the SO_SNDTIMEO_NEW sockopt from kernel
space without going through a fake uaccess.  The interface is
simplified to only pass the seconds value, as that is the only
thing needed at the moment.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Christoph Hellwig 2020-05-28 07:12:12 +02:00 committed by David S. Miller
parent 6e43496745
commit 76ee0785f4
3 changed files with 14 additions and 6 deletions
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8
fs/dlm/lowcomms.c
View File

@ -918,7 +918,6 @@ static void sctp_connect_to_sock(struct connection *con)
int result;
int addr_len;
struct socket *sock;
struct __kernel_sock_timeval tv = { .tv_sec = 5, .tv_usec = 0 };
if (con->nodeid == 0) {
log_print("attempt to connect sock 0 foiled");
@ -970,13 +969,10 @@ static void sctp_connect_to_sock(struct connection *con)
* since O_NONBLOCK argument in connect() function does not work here,
* then, we should restore the default value of this attribute.
*/
kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO_NEW, (char *)&tv,
sizeof(tv));
sock_set_sndtimeo(sock->sk, 5);
result = sock->ops->connect(sock, (struct sockaddr *)&daddr, addr_len,
0);
memset(&tv, 0, sizeof(tv));
kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO_NEW, (char *)&tv,
sizeof(tv));
sock_set_sndtimeo(sock->sk, 0);
if (result == -EINPROGRESS)
result = 0;

1
include/net/sock.h
View File

@ -2691,5 +2691,6 @@ void sock_def_readable(struct sock *sk);
void sock_no_linger(struct sock *sk);
void sock_set_priority(struct sock *sk, u32 priority);
void sock_set_reuseaddr(struct sock *sk);
void sock_set_sndtimeo(struct sock *sk, s64 secs);
#endif /* _SOCK_H */

11
net/core/sock.c
View File

@ -737,6 +737,17 @@ void sock_set_priority(struct sock *sk, u32 priority)
}
EXPORT_SYMBOL(sock_set_priority);
void sock_set_sndtimeo(struct sock *sk, s64 secs)
{
lock_sock(sk);
if (secs && secs < MAX_SCHEDULE_TIMEOUT / HZ - 1)
sk->sk_sndtimeo = secs * HZ;
else
sk->sk_sndtimeo = MAX_SCHEDULE_TIMEOUT;
release_sock(sk);
}
EXPORT_SYMBOL(sock_set_sndtimeo);
/*
* This is meant for all protocols to use and covers goings on
* at the socket level. Everything here is generic.