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net: add sock_set_keepalive

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Add a helper to directly set the SO_KEEPALIVE sockopt from kernel space
without going through a fake uaccess.

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 07:12:15 +02:00
committed by David S. Miller
parent 783da70e83
commit ce3d9544ce
5 changed files with 14 additions and 13 deletions
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10
net/core/sock.c
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@@ -779,6 +779,16 @@ void sock_enable_timestamps(struct sock *sk)
}
EXPORT_SYMBOL(sock_enable_timestamps);
void sock_set_keepalive(struct sock *sk)
{
lock_sock(sk);
if (sk->sk_prot->keepalive)
sk->sk_prot->keepalive(sk, true);
sock_valbool_flag(sk, SOCK_KEEPOPEN, true);
release_sock(sk);
}
EXPORT_SYMBOL(sock_set_keepalive);
/*
* This is meant for all protocols to use and covers goings on
* at the socket level. Everything here is generic.