sunrpc: new tracepoints for call/reply tracking

These patches add some tracepoints that I recently used when tracking down the hang that Christoph reported recently. At this point, I still haven't followed the trail to completion, but I think the problem is not likely to be in the RPC code.

Please consider these for v3.19? Some of these are for client RPC and some for server-side. I'll assume that Trond will merge these, but review by others would be appreciated as well.

Jeff Layton (3):
sunrpc: add some tracepoints in svc_rqst handling functions
sunrpc: add new tracepoints in xprt handling code
sunrpc: add tracepoints in xs_tcp_data_recv

 include/linux/sunrpc/xprtsock.h |  59 +++++++++++++++
 include/trace/events/sunrpc.h   | 160 ++++++++++++++++++++++++++++++++++++++++
 net/sunrpc/svc.c                |  21 +++---
 net/sunrpc/svc_xprt.c           |  31 +++++---
 net/sunrpc/xprt.c               |   9 ++-
 net/sunrpc/xprtsock.c           |  69 +++--------------
 6 files changed, 269 insertions(+), 80 deletions(-)

1.9.3