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| author | Neil Horman <nhorman@tuxdriver.com> | 2009-08-13 05:19:44 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-08-13 16:26:14 -0700 |
| commit | e9b3cc1b3779fe10a80de4c3e7404bd308d0eae3 (patch) | |
| tree | 3c6c8ea0fd37a2d26eb7d06f2ce29baf98503702 | |
| parent | 1e5053b7635c6a985a7cd8108e538883d961de2a (diff) | |
| download | linux-stable-e9b3cc1b3779fe10a80de4c3e7404bd308d0eae3.tar.gz linux-stable-e9b3cc1b3779fe10a80de4c3e7404bd308d0eae3.tar.bz2 linux-stable-e9b3cc1b3779fe10a80de4c3e7404bd308d0eae3.zip | |
net: skb ftracer - add tracepoint to skb_copy_datagram_iovec (v3)
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(+)
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | include/trace/events/skb.h | 20 | ||||
| -rw-r--r-- | net/core/datagram.c | 3 |
2 files changed, 23 insertions, 0 deletions
diff --git a/include/trace/events/skb.h b/include/trace/events/skb.h index e499863b9669..4b2be6dc76f0 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 b0fe69211eef..1c6cf3a1a4f6 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) |