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udp6: cleanup stats accounting in recvmsg()

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In the udp6 code path, we needed multiple tests to select the correct
mib to be updated. Since we touch at least a counter at each iteration,
it's convenient to use the recently introduced __UDPX_MIB() helper once
and remove some code duplication.

Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Abeni 2018-11-09 15:52:45 +01:00 committed by David S. Miller
parent 560f1ba4d8
commit 029a374348
1 changed files with 7 additions and 25 deletions
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32
net/ipv6/udp.c
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@ -326,6 +326,7 @@ int udpv6_recvmsg(struct sock *sk, struct msghdr *msg, size_t len,
int err;
int is_udplite = IS_UDPLITE(sk);
bool checksum_valid = false;
struct udp_mib *mib;
int is_udp4;
if (flags & MSG_ERRQUEUE)
@ -349,6 +350,7 @@ try_again:
msg->msg_flags |= MSG_TRUNC;
is_udp4 = (skb->protocol == htons(ETH_P_IP));
mib = __UDPX_MIB(sk, is_udp4);
/*
* If checksum is needed at all, try to do it while copying the
@ -377,24 +379,13 @@ try_again:
if (unlikely(err)) {
if (!peeked) {
atomic_inc(&sk->sk_drops);
if (is_udp4)
UDP_INC_STATS(sock_net(sk), UDP_MIB_INERRORS,
is_udplite);
else
UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS,
is_udplite);
SNMP_INC_STATS(mib, UDP_MIB_INERRORS);
}
kfree_skb(skb);
return err;
}
if (!peeked) {
if (is_udp4)
UDP_INC_STATS(sock_net(sk), UDP_MIB_INDATAGRAMS,
is_udplite);
else
UDP6_INC_STATS(sock_net(sk), UDP_MIB_INDATAGRAMS,
is_udplite);
}
if (!peeked)
SNMP_INC_STATS(mib, UDP_MIB_INDATAGRAMS);
sock_recv_ts_and_drops(msg, sk, skb);
@ -443,17 +434,8 @@ try_again:
csum_copy_err:
if (!__sk_queue_drop_skb(sk, &udp_sk(sk)->reader_queue, skb, flags,
udp_skb_destructor)) {
if (is_udp4) {
UDP_INC_STATS(sock_net(sk),
UDP_MIB_CSUMERRORS, is_udplite);
UDP_INC_STATS(sock_net(sk),
UDP_MIB_INERRORS, is_udplite);
} else {
UDP6_INC_STATS(sock_net(sk),
UDP_MIB_CSUMERRORS, is_udplite);
UDP6_INC_STATS(sock_net(sk),
UDP_MIB_INERRORS, is_udplite);
}
SNMP_INC_STATS(mib, UDP_MIB_CSUMERRORS);
SNMP_INC_STATS(mib, UDP_MIB_INERRORS);
}
kfree_skb(skb);