@@ -2,6 +2,7 @@
#define _TRACE_SKB_H
#include <linux/skbuff.h>
+#include <linux/netdevice.h>
#include <linux/tracepoint.h>
#undef TRACE_SYSTEM
@@ -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 */
@@ -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