[TCP]: TCP Probe congestion window tracing

This adds a new module for tracking TCP state variables non-intrusively
using kprobes.  It has a simple /proc interface that outputs one line
for each packet received. A sample usage is to collect congestion
window and ssthresh over time graphs.

Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 15 insertions, 0 deletions

diff --git a/net/Kconfig b/net/Kconfig
index 4193cdcd3ae7..ff0db804eed8 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -215,6 +215,21 @@ config NET_PKTGEN
           To compile this code as a module, choose M here: the
           module will be called pktgen.
 
+config NET_TCPPROBE
+        tristate "TCP connection probing"
+        depends on INET && EXPERIMENTAL && PROC_FS && KPROBES
+        ---help---
+        This module allows for capturing the changes to TCP connection
+        state in response to incoming patckets. It is used for debugging
+        TCP congestion avoidance modules. If you don't understand
+        what was just said, you don't need it: say N.
+
+        Documentation on how to use the packet generator can be found
+        at http://linux-net.osdl.org/index.php/TcpProbe
+
+        To compile this code as a module, choose M here: the
+        module will be called tcp_probe.
+
 endmenu
 
 endmenu