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net: datagram: drop 'destructor' argument from several helpers

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The only users for such argument are the UDP protocol and the UNIX
socket family. We can safely reclaim the accounted memory directly
from the UDP code and, after the previous patch, we can do scm
stats accounting outside the datagram helpers.

Overall this cleans up a bit some datagram-related helpers, and
avoids an indirect call per packet in the UDP receive path.

v1 -> v2:
 - call scm_stat_del() only when not peeking - Kirill
 - fix build issue with CONFIG_INET_ESPINTCP

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Reviewed-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Reviewed-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni 2020-02-28 14:45:22 +01:00 • committed by David S. Miller
parent 7782040b95
commit e427cad6ee
5 changed files with 23 additions and 37 deletions
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7
net/unix/af_unix.c
View file

@ -2106,9 +2106,12 @@ static int unix_dgram_recvmsg(struct socket *sock, struct msghdr *msg,
skip = sk_peek_offset(sk, flags);
skb = __skb_try_recv_datagram(sk, &sk->sk_receive_queue, flags,
scm_stat_del, &skip, &err, &last);
if (skb)
&skip, &err, &last);
if (skb) {
if (!(flags & MSG_PEEK))
scm_stat_del(sk, skb);
break;
}
mutex_unlock(&u->iolock);