diff options
author | Jakub Kicinski <kuba@kernel.org> | 2024-03-29 22:18:26 +0300 |
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committer | Jakub Kicinski <kuba@kernel.org> | 2024-03-29 22:18:26 +0300 |
commit | e6091ba518bef0327ac8a3cf74112ba19c3bc27c (patch) | |
tree | f03c91302179f46268233750bf276815477542a5 | |
parent | b7b1c59069123368a939327d49009e8771e88d9c (diff) | |
parent | e9669a00bba79442dd4862c57761333d6a020c24 (diff) | |
download | linux-e6091ba518bef0327ac8a3cf74112ba19c3bc27c.tar.xz |
Merge branch 'add-ip-port-information-to-udp-drop-tracepoint'
Balazs Scheidler says:
====================
Add IP/port information to UDP drop tracepoint
In our use-case we would like to recover the properties of dropped UDP
packets. Unfortunately the current udp_fail_queue_rcv_skb tracepoint
only exposes the port number of the receiving socket.
This patch-set will add the source/dest ip/port to the tracepoint, while
keeping the socket's local port as well for compatibility.
Thanks for the review comments by Jason and Kuniyuki, they helped me a lot
and I tried to address all of their comments in this new iteration.
====================
Link: https://lore.kernel.org/r/cover.1711475011.git.balazs.scheidler@axoflow.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
-rw-r--r-- | include/trace/events/net_probe_common.h | 40 | ||||
-rw-r--r-- | include/trace/events/tcp.h | 45 | ||||
-rw-r--r-- | include/trace/events/udp.h | 29 | ||||
-rw-r--r-- | net/ipv4/udp.c | 2 | ||||
-rw-r--r-- | net/ipv6/udp.c | 3 |
5 files changed, 69 insertions, 50 deletions
diff --git a/include/trace/events/net_probe_common.h b/include/trace/events/net_probe_common.h index b1f9a4d3ee13..5e33f91bdea3 100644 --- a/include/trace/events/net_probe_common.h +++ b/include/trace/events/net_probe_common.h @@ -70,4 +70,44 @@ TP_STORE_V4MAPPED(__entry, saddr, daddr) #endif +#define TP_STORE_ADDR_PORTS_SKB_V4(__entry, skb, protoh) \ + do { \ + struct sockaddr_in *v4 = (void *)__entry->saddr; \ + \ + v4->sin_family = AF_INET; \ + v4->sin_port = protoh->source; \ + v4->sin_addr.s_addr = ip_hdr(skb)->saddr; \ + v4 = (void *)__entry->daddr; \ + v4->sin_family = AF_INET; \ + v4->sin_port = protoh->dest; \ + v4->sin_addr.s_addr = ip_hdr(skb)->daddr; \ + } while (0) + +#if IS_ENABLED(CONFIG_IPV6) + +#define TP_STORE_ADDR_PORTS_SKB(__entry, skb, protoh) \ + do { \ + const struct iphdr *iph = ip_hdr(skb); \ + \ + if (iph->version == 6) { \ + struct sockaddr_in6 *v6 = (void *)__entry->saddr; \ + \ + v6->sin6_family = AF_INET6; \ + v6->sin6_port = protoh->source; \ + v6->sin6_addr = ipv6_hdr(skb)->saddr; \ + v6 = (void *)__entry->daddr; \ + v6->sin6_family = AF_INET6; \ + v6->sin6_port = protoh->dest; \ + v6->sin6_addr = ipv6_hdr(skb)->daddr; \ + } else \ + TP_STORE_ADDR_PORTS_SKB_V4(__entry, skb, protoh); \ + } while (0) + +#else + +#define TP_STORE_ADDR_PORTS_SKB(__entry, skb, protoh) \ + TP_STORE_ADDR_PORTS_SKB_V4(__entry, skb, protoh) + +#endif + #endif diff --git a/include/trace/events/tcp.h b/include/trace/events/tcp.h index 3c08a0846c47..1db95175c1e5 100644 --- a/include/trace/events/tcp.h +++ b/include/trace/events/tcp.h @@ -273,48 +273,6 @@ TRACE_EVENT(tcp_probe, __entry->skbaddr, __entry->skaddr) ); -#define TP_STORE_ADDR_PORTS_SKB_V4(__entry, skb) \ - do { \ - const struct tcphdr *th = (const struct tcphdr *)skb->data; \ - struct sockaddr_in *v4 = (void *)__entry->saddr; \ - \ - v4->sin_family = AF_INET; \ - v4->sin_port = th->source; \ - v4->sin_addr.s_addr = ip_hdr(skb)->saddr; \ - v4 = (void *)__entry->daddr; \ - v4->sin_family = AF_INET; \ - v4->sin_port = th->dest; \ - v4->sin_addr.s_addr = ip_hdr(skb)->daddr; \ - } while (0) - -#if IS_ENABLED(CONFIG_IPV6) - -#define TP_STORE_ADDR_PORTS_SKB(__entry, skb) \ - do { \ - const struct iphdr *iph = ip_hdr(skb); \ - \ - if (iph->version == 6) { \ - const struct tcphdr *th = (const struct tcphdr *)skb->data; \ - struct sockaddr_in6 *v6 = (void *)__entry->saddr; \ - \ - v6->sin6_family = AF_INET6; \ - v6->sin6_port = th->source; \ - v6->sin6_addr = ipv6_hdr(skb)->saddr; \ - v6 = (void *)__entry->daddr; \ - v6->sin6_family = AF_INET6; \ - v6->sin6_port = th->dest; \ - v6->sin6_addr = ipv6_hdr(skb)->daddr; \ - } else \ - TP_STORE_ADDR_PORTS_SKB_V4(__entry, skb); \ - } while (0) - -#else - -#define TP_STORE_ADDR_PORTS_SKB(__entry, skb) \ - TP_STORE_ADDR_PORTS_SKB_V4(__entry, skb) - -#endif - /* * tcp event with only skb */ @@ -331,12 +289,13 @@ DECLARE_EVENT_CLASS(tcp_event_skb, ), TP_fast_assign( + const struct tcphdr *th = (const struct tcphdr *)skb->data; __entry->skbaddr = skb; memset(__entry->saddr, 0, sizeof(struct sockaddr_in6)); memset(__entry->daddr, 0, sizeof(struct sockaddr_in6)); - TP_STORE_ADDR_PORTS_SKB(__entry, skb); + TP_STORE_ADDR_PORTS_SKB(__entry, skb, th); ), TP_printk("skbaddr=%p src=%pISpc dest=%pISpc", diff --git a/include/trace/events/udp.h b/include/trace/events/udp.h index 336fe272889f..62bebe2a6ece 100644 --- a/include/trace/events/udp.h +++ b/include/trace/events/udp.h @@ -7,24 +7,43 @@ #include <linux/udp.h> #include <linux/tracepoint.h> +#include <trace/events/net_probe_common.h> TRACE_EVENT(udp_fail_queue_rcv_skb, - TP_PROTO(int rc, struct sock *sk), + TP_PROTO(int rc, struct sock *sk, struct sk_buff *skb), - TP_ARGS(rc, sk), + TP_ARGS(rc, sk, skb), TP_STRUCT__entry( __field(int, rc) - __field(__u16, lport) + + __field(__u16, sport) + __field(__u16, dport) + __field(__u16, family) + __array(__u8, saddr, sizeof(struct sockaddr_in6)) + __array(__u8, daddr, sizeof(struct sockaddr_in6)) ), TP_fast_assign( + const struct udphdr *uh = (const struct udphdr *)udp_hdr(skb); + __entry->rc = rc; - __entry->lport = inet_sk(sk)->inet_num; + + /* for filtering use */ + __entry->sport = ntohs(uh->source); + __entry->dport = ntohs(uh->dest); + __entry->family = sk->sk_family; + + memset(__entry->saddr, 0, sizeof(struct sockaddr_in6)); + memset(__entry->daddr, 0, sizeof(struct sockaddr_in6)); + + TP_STORE_ADDR_PORTS_SKB(__entry, skb, uh); ), - TP_printk("rc=%d port=%hu", __entry->rc, __entry->lport) + TP_printk("rc=%d family=%s src=%pISpc dest=%pISpc", __entry->rc, + show_family_name(__entry->family), + __entry->saddr, __entry->daddr) ); #endif /* _TRACE_UDP_H */ diff --git a/net/ipv4/udp.c b/net/ipv4/udp.c index 661d0e0d273f..531882f321f2 100644 --- a/net/ipv4/udp.c +++ b/net/ipv4/udp.c @@ -2049,8 +2049,8 @@ static int __udp_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) drop_reason = SKB_DROP_REASON_PROTO_MEM; } UDP_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); + trace_udp_fail_queue_rcv_skb(rc, sk, skb); kfree_skb_reason(skb, drop_reason); - trace_udp_fail_queue_rcv_skb(rc, sk); return -1; } diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c index 7c1e6469d091..2e4dc5e6137b 100644 --- a/net/ipv6/udp.c +++ b/net/ipv6/udp.c @@ -34,6 +34,7 @@ #include <linux/slab.h> #include <linux/uaccess.h> #include <linux/indirect_call_wrapper.h> +#include <trace/events/udp.h> #include <net/addrconf.h> #include <net/ndisc.h> @@ -658,8 +659,8 @@ static int __udpv6_queue_rcv_skb(struct sock *sk, struct sk_buff *skb) drop_reason = SKB_DROP_REASON_PROTO_MEM; } UDP6_INC_STATS(sock_net(sk), UDP_MIB_INERRORS, is_udplite); + trace_udp_fail_queue_rcv_skb(rc, sk, skb); kfree_skb_reason(skb, drop_reason); - trace_udp_fail_queue_rcv_skb(rc, sk); return -1; } |