| Message ID | 20090813151944.GA16682@hmsreliant.think-freely.org |
|---|---|
| State | Accepted, archived |
| Delegated to: | David Miller |
| Headers | show |
From: Neil Horman <nhorman@tuxdriver.com> Date: Thu, 13 Aug 2009 11:19:44 -0400 > skb allocation / cosumption tracer - Add consumption tracepoint > > This patch adds a tracepoint to skb_copy_datagram_iovec, which is called each > time a userspace process copies a frame from a socket receive queue to a user > space buffer. It allows us to hook in and examine each sk_buff that the system > receives on a per-socket bases, and can be use to compile a list of which skb's > were received by which processes. > > Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Applied to net-next-2.6 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/include/trace/events/skb.h b/include/trace/events/skb.h index e499863..4b2be6d 100644 --- a/include/trace/events/skb.h +++ b/include/trace/events/skb.h @@ -5,6 +5,7 @@ #define _TRACE_SKB_H #include <linux/skbuff.h> +#include <linux/netdevice.h> #include <linux/tracepoint.h> /* @@ -34,6 +35,25 @@ TRACE_EVENT(kfree_skb, __entry->skbaddr, __entry->protocol, __entry->location) ); +TRACE_EVENT(skb_copy_datagram_iovec, + + TP_PROTO(const struct sk_buff *skb, int len), + + TP_ARGS(skb, len), + + TP_STRUCT__entry( + __field( const void *, skbaddr ) + __field( int, len ) + ), + + TP_fast_assign( + __entry->skbaddr = skb; + __entry->len = len; + ), + + TP_printk("skbaddr=%p len=%d", __entry->skbaddr, __entry->len) +); + #endif /* _TRACE_SKB_H */ /* This part must be outside protection */ diff --git a/net/core/datagram.c b/net/core/datagram.c index b0fe692..1c6cf3a 100644 --- a/net/core/datagram.c +++ b/net/core/datagram.c @@ -55,6 +55,7 @@ #include <net/checksum.h> #include <net/sock.h> #include <net/tcp_states.h> +#include <trace/events/skb.h> /* * Is a socket 'connection oriented' ? @@ -284,6 +285,8 @@ int skb_copy_datagram_iovec(const struct sk_buff *skb, int offset, int i, copy = start - offset; struct sk_buff *frag_iter; + trace_skb_copy_datagram_iovec(skb, len); + /* Copy header. */ if (copy > 0) { if (copy > len)
skb allocation / cosumption tracer - Add consumption tracepoint This patch adds a tracepoint to skb_copy_datagram_iovec, which is called each time a userspace process copies a frame from a socket receive queue to a user space buffer. It allows us to hook in and examine each sk_buff that the system receives on a per-socket bases, and can be use to compile a list of which skb's were received by which processes. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> include/trace/events/skb.h | 20 ++++++++++++++++++++ net/core/datagram.c | 3 +++ 2 files changed, 23 insertions(+) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html