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| author |   David Ahern <dsahern@kernel.org> | 2022-02-11 09:15:07 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2022-02-14 11:24:39 +0000 |
| commit | 4cf91f825b2777f81799f98ce32172b829acd1b2 (patch) | |
| tree | 3213734eadaf0e18f939a48ac8c4c42bdd9f826d /net/ipv6/udp.c | |
| parent | Merge branch 'dm9051' (diff) | |
| download | linux-dev-4cf91f825b2777f81799f98ce32172b829acd1b2.tar.xz linux-dev-4cf91f825b2777f81799f98ce32172b829acd1b2.zip | |
ipv6: Add reasons for skb drops to __udp6_lib_rcv
Add reasons to __udp6_lib_rcv for skb drops. The only twist is that the
NO_SOCKET takes precedence over the CSUM or other counters for that
path (motivation behind this patch - csum counter was misleading).
Signed-off-by: David Ahern <dsahern@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/udp.c')
| -rw-r--r-- | net/ipv6/udp.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index c6872596b408..7f0fa9bd9ffe 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -912,6 +912,7 @@ static int udp6_unicast_rcv_skb(struct sock *sk, struct sk_buff *skb, int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, int proto) { + enum skb_drop_reason reason = SKB_DROP_REASON_NOT_SPECIFIED; const struct in6_addr *saddr, *daddr; struct net *net = dev_net(skb->dev); struct udphdr *uh; @@ -988,6 +989,8 @@ int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, return udp6_unicast_rcv_skb(sk, skb, uh); } + reason = SKB_DROP_REASON_NO_SOCKET; + if (!uh->check) goto report_csum_error; @@ -1000,10 +1003,12 @@ int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable, __UDP6_INC_STATS(net, UDP_MIB_NOPORTS, proto == IPPROTO_UDPLITE); icmpv6_send(skb, ICMPV6_DEST_UNREACH, ICMPV6_PORT_UNREACH, 0); - kfree_skb(skb); + kfree_skb_reason(skb, reason); return 0; short_packet: + if (reason == SKB_DROP_REASON_NOT_SPECIFIED) + reason = SKB_DROP_REASON_PKT_TOO_SMALL; net_dbg_ratelimited("UDP%sv6: short packet: From [%pI6c]:%u %d/%d to [%pI6c]:%u\n", proto == IPPROTO_UDPLITE ? "-Lite" : "", saddr, ntohs(uh->source), @@ -1014,10 +1019,12 @@ short_packet: report_csum_error: udp6_csum_zero_error(skb); csum_error: + if (reason == SKB_DROP_REASON_NOT_SPECIFIED) + reason = SKB_DROP_REASON_UDP_CSUM; __UDP6_INC_STATS(net, UDP_MIB_CSUMERRORS, proto == IPPROTO_UDPLITE); discard: __UDP6_INC_STATS(net, UDP_MIB_INERRORS, proto == IPPROTO_UDPLITE); - kfree_skb(skb); + kfree_skb_reason(skb, reason); return 0; } |