diff mbox series

[net-next] ipv6: Add reasons for skb drops to __udp6_lib_rcv

Message ID 20220211171507.3969-1-dsahern@kernel.org (mailing list archive)
State Accepted
Commit 4cf91f825b2777f81799f98ce32172b829acd1b2
Delegated to: Netdev Maintainers
Headers show
Series [net-next] ipv6: Add reasons for skb drops to __udp6_lib_rcv | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Single patches do not need cover letters
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers warning 1 maintainers not CCed: yoshfuji@linux-ipv6.org
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 41 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

David Ahern Feb. 11, 2022, 5:15 p.m. UTC 
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>
---
 net/ipv6/udp.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

Comments

patchwork-bot+netdevbpf@kernel.org Feb. 14, 2022, 11:30 a.m. UTC | #1 
Hello:

This patch was applied to netdev/net-next.git (master)
by David S. Miller <davem@davemloft.net>:

On Fri, 11 Feb 2022 09:15:07 -0800 you wrote:
> 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>
> ---
>  net/ipv6/udp.c | 11 +++++++++--
>  1 file changed, 9 insertions(+), 2 deletions(-)

Here is the summary with links:
  - [net-next] ipv6: Add reasons for skb drops to __udp6_lib_rcv
    https://git.kernel.org/netdev/net-next/c/4cf91f825b27

You are awesome, thank you!
diff mbox series

Patch

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 @@  int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
 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;
 }