// rpc tapset
// Copyright (C) 2006 IBM Corp.
// Copyright (C) 2007 Bull S.A.S
// Copyright (C) 2008 Red Hat
//
// This file is part of systemtap, and is free software.  You can
// redistribute it and/or modify it under the terms of the GNU General
// Public License (GPL); either version 2, or (at your option) any
// later version.

%{
#include <linux/kernel.h>
#include <linux/sunrpc/clnt.h>
#include <linux/sunrpc/svc.h>
%}

probe sunrpc.entry =
	sunrpc.clnt.entry,
	sunrpc.svc.entry,
	sunrpc.sched.entry
{}

probe sunrpc.return = 
	sunrpc.clnt.return,
	sunrpc.svc.return,
	sunrpc.sched.return
{}

/******************************************************************
 *                Probe points on RPC client functions            *  
 ******************************************************************/

probe sunrpc.clnt.entry = 
	sunrpc.clnt.create_client,
	sunrpc.clnt.clone_client,
	sunrpc.clnt.bind_new_program,
	sunrpc.clnt.shutdown_client,
	sunrpc.clnt.call_sync,
	sunrpc.clnt.call_async,
	sunrpc.clnt.restart_call
{}

probe sunrpc.clnt.return = 
	sunrpc.clnt.create_client.return,
	sunrpc.clnt.clone_client.return,
	sunrpc.clnt.bind_new_program.return,
	sunrpc.clnt.shutdown_client.return,
	sunrpc.clnt.call_sync.return,
	sunrpc.clnt.call_async.return,
	sunrpc.clnt.restart_call.return
{}

/*
 * Fires when an RPC client is to be created
 * 
 *  struct rpc_clnt * 
 *  rpc_create_client(struct rpc_xprt *xprt, char *servname, 
 *  	struct rpc_program *info, u32 version, 
 * 	rpc_authflavor_t authflavor)
 *
 *  static struct rpc_clnt * 
 *  rpc_new_client(struct rpc_xprt *xprt, char *servname, 
 * struct rpc_program *program, u32 vers, 
 * rpc_authflavor_t flavor)
 * 
 *  @servername: the server machine name
 *  @progname:   the RPC program name
 *  @prog:       the RPC program number
 *  @vers:	 the RPC program version number
 *  @prot:	 the IP protocol number
 *  @port:	 the port number
 *  @authflavor: the authentication flavor
 */
probe sunrpc.clnt.create_client = _sunrpc.clnt.create_client.*
{
	servername = kernel_string($servname)
	prot = $xprt->prot
	port = $xprt->port
	argstr = sprintf("%s %s %d %d %d %d %d", servername, progname, 
		prog, vers, prot, port, authflavor)
}

%( kernel_v <= "2.6.18" %?
probe _sunrpc.clnt.create_client.part1 = kernel.function("rpc_create_client") !,
	module("sunrpc").function("rpc_create_client")
{
	name = "sunrpc.clnt.create_client"
%( kernel_v >= "2.6.10" %?
	progname = kernel_string($info->name)
	prog = $info->number
	vers = vers_from_prog($info, $version)
	authflavor = $authflavor
%:
	progname = kernel_string($program->name)
	prog = $program->number
	vers = vers_from_prog($program, $vers)
	authflavor = $flavor
%)
}
%)

probe _sunrpc.clnt.create_client.part2 = kernel.function("rpc_new_client") !,
	module("sunrpc").function("rpc_new_client")
{
	name = "sunrpc.clnt.new_client"
	progname = kernel_string($program->name)
	prog = $program->number
	vers = vers_from_prog($program, $vers)
	authflavor = $flavor
}

probe sunrpc.clnt.create_client.return = _sunrpc.clnt.create_client.return.*
{
	retstr = returnstr(2)
}

%( kernel_v <= "2.6.18" %?
probe _sunrpc.clnt.create_client.return.part1 = 
	kernel.function("rpc_create_client").return !,
	module("sunrpc").function("rpc_create_client").return
{
	name = "sunrpc.clnt.create_client.return"
}
%)

probe _sunrpc.clnt.create_client.return.part2 =
	kernel.function("rpc_new_client").return !,
	module("sunrpc").function("rpc_new_client").return
{
	name = "sunrpc.clnt.new_client.return"
}

/*
 * Fires when the RPC client structure is to be cloned
 * 
 * struct rpc_clnt * rpc_clone_client(struct rpc_clnt *clnt)
 * 
 *  @servername: the server machine name
 *  @progname:   the RPC program name
 *  @prog:       the RPC program number
 *  @vers:	 the RPC program version number
 *  @prot:	 the IP protocol number
 *  @port:	 the port number
 *  @authflavor: the authentication flavor
 */
probe sunrpc.clnt.clone_client = kernel.function("rpc_clone_client") !,
      	module("sunrpc").function("rpc_clone_client")
{
	servername = kernel_string($clnt->cl_server)
	progname = kernel_string($clnt->cl_protname)
	prog = prog_from_clnt($clnt)
	vers = vers_from_clnt($clnt)
	prot = prot_from_clnt($clnt)
	port = port_from_clnt($clnt)
	authflavor = $clnt->cl_auth->au_flavor
	
	name = "sunrpc.clnt.clone_client"
	argstr = sprintf("%s %s %d %d %d %d %d", servername, progname, 
			prog, vers, prot, port, authflavor)
}

probe sunrpc.clnt.clone_client.return = 
	kernel.function("rpc_clone_client").return !,
      	module("sunrpc").function("rpc_clone_client").return
{
	name = "sunrpc.clnt.clone_client.return"
	retstr = returnstr(2)
}

/*
 * Fires when an RPC client is to be shut down.
 *
 * int rpc_shutdown_client(struct rpc_clnt *clnt)
 *
 *  @servername: the server machine name
 *  @progname:   the RPC program name
 *  @prog:       the RPC program number
 *  @vers:	 the RPC program version number
 *  @prot:	 the IP protocol number
 *  @port:	 the port number
 *  @authflavor: the authentication flavor
 *  
 *  @clones:     the number of clones
 *  @tasks:      the number of references
 *  
 *  @netreconn:  the count of reconnections
 *  @rpccnt:     the count of RPC calls
 *  @om_ops:      the count of operations
 *  @om_ntrans:   the count of RPC transmissions
 *  @om_bytes_sent: the count of bytes out
 *  @om_bytes_recv: the count of bytes in
 *  @om_queue:    the jiffies queued for xmit
 *  @om_rtt:      the RPC RTT jiffies
 *  @om_execute:  the RPC execution jiffies
 */
probe sunrpc.clnt.shutdown_client = kernel.function("rpc_shutdown_client") !,
      	module("sunrpc").function("rpc_shutdown_client")
{
	servername = kernel_string($clnt->cl_server)
	progname = kernel_string($clnt->cl_protname)
	prog = prog_from_clnt($clnt)
	vers = vers_from_clnt($clnt)
	prot = prot_from_clnt($clnt)
	port = port_from_clnt($clnt)
	authflavor = $clnt->cl_auth->au_flavor
	clones = clones_from_clnt($clnt)
	tasks = tasks_from_clnt($clnt)

	/* per-program statistics */
	netreconn = $clnt->cl_stats->netreconn
	rpccnt = $clnt->cl_stats->rpccnt

	/* per-client statistics */
	om_ops = $clnt->cl_metrics->om_ops
	om_ntrans = $clnt->cl_metrics->om_ntrans
	om_bytes_sent = $clnt->cl_metrics->om_bytes_sent
	om_bytes_recv = $clnt->cl_metrics->om_bytes_recv
	om_queue = $clnt->cl_metrics->om_queue
	om_rtt = $clnt->cl_metrics->om_rtt
	om_execute = $clnt->cl_metrics->om_execute

	name = "sunrpc.clnt.shutdown_client"
	argstr = sprintf("%s %s %d %d %d %d %d %d %d", servername, progname, 
			prog, vers, prot, port, authflavor, clones, tasks)
}

probe sunrpc.clnt.shutdown_client.return = 
	kernel.function("rpc_shutdown_client").return !,
      	module("sunrpc").function("rpc_shutdown_client").return
{
	name = "sunrpc.clnt.shutdown_client.return"
	retstr = returnstr(1)
}

/*
 * Fires when a new RPC program is to be bound an existing client
 *
 * struct rpc_clnt * rpc_bind_new_program(struct rpc_clnt *old, 
 * 	struct rpc_program *program, int vers)
 *
 *  @servername:     the server machine name
 *  @old_progname:   the name of old RPC program
 *  @old_prog:       the number of old RPC program
 *  @old_vers:	     the version of old RPC program 
 *  @progname:       the name of new RPC program
 *  @prog:           the number of new RPC program
 *  @vers:	     the version of new RPC program 
 */
probe sunrpc.clnt.bind_new_program = 
	kernel.function("rpc_bind_new_program") !,
      	module("sunrpc").function("rpc_bind_new_program")
{
	servername = kernel_string($old->cl_server)
	old_progname = kernel_string($old->cl_protname)
	old_prog = prog_from_clnt($old)
	old_vers = vers_from_clnt($old)
	progname = kernel_string($program->name)
	prog = $program->number
	vers = vers_from_prog($program, $vers)

	name = "sunrpc.clnt.bind_new_program"
	argstr = sprintf("%s %s %d %s %d", servername, old_progname, 
			old_vers, progname, vers)
}

probe sunrpc.clnt.bind_new_program.return = 
	kernel.function("rpc_bind_new_program").return !,
      	module("sunrpc").function("rpc_bind_new_program").return
{
	name = "sunrpc.clnt.bind_new_program.return"
	retstr = returnstr(2)
}

/*
 * int rpc_call_sync(struct rpc_clnt *clnt, struct rpc_message *msg, 
 * 	int flags)
 *
 *  @servername: the server machine name
 *  @progname:   the RPC program name
 *  @prog:       the RPC program number
 *  @vers:	 the RPC program version number
 *  @prot:	 the IP protocol number
 *  @port:	 the port number
 *  @xid:        current transmission id
 *  @dead:       whether this client is abandoned
 *  @procname:   the procedure name in this RPC call
 *  @proc:       the procedure number in this RPC call
 *  @flags:      flags
 */
probe sunrpc.clnt.call_sync = kernel.function("rpc_call_sync") !,
      	module("sunrpc").function("rpc_call_sync")
{
	servername = kernel_string($clnt->cl_server)
	progname = kernel_string($clnt->cl_protname)
	prog = prog_from_clnt($clnt)
	vers = vers_from_clnt($clnt)
	prot = prot_from_clnt($clnt)
	port = port_from_clnt($clnt)
	xid  = xid_from_clnt($clnt)
	dead = $clnt->cl_dead

%( kernel_v >= "2.6.17" %?
	procname= $msg->rpc_proc->p_name 
		? kernel_string($msg->rpc_proc->p_name) : "NULL"
%)
	proc = proc_from_msg($msg)
	flags = $flags
	
	name = "sunrpc.clnt.call_sync"
	argstr = sprintf("%s %d %s %d %s %d", servername, xid, progname, 
			vers, procname, flags)
}

probe sunrpc.clnt.call_sync.return = kernel.function("rpc_call_sync").return !,
      	module("sunrpc").function("rpc_call_sync").return
{
	name = "sunrpc.clnt.call_sync.return"
	retstr = returnstr(1)
}

/*
 * int rpc_call_async(struct rpc_clnt *clnt, struct rpc_message *msg, 
 * 	int flags, const struct rpc_call_ops *tk_ops, void *data)
 *
 *  @servername: the server machine name
 *  @progname:   the RPC program name
 *  @prog:       the RPC program number
 *  @vers:	 the RPC program version number
 *  @prot:	 the IP protocol number
 *  @port:	 the port number
 *  @xid:        current transmission id
 *  @dead:       whether this client is abandoned
 *  @procname:   the procedure name in this RPC call
 *  @proc:       the procedure number in this RPC call
 *  @flags:      flags
 */
probe sunrpc.clnt.call_async = kernel.function("rpc_call_async") !,
      	module("sunrpc").function("rpc_call_async")
{
	servername = kernel_string($clnt->cl_server)
	progname = kernel_string($clnt->cl_protname)
	prog = prog_from_clnt($clnt)
	vers = vers_from_clnt($clnt)
	prot = prot_from_clnt($clnt)
	port = port_from_clnt($clnt)
	xid  = xid_from_clnt($clnt)
	dead = $clnt->cl_dead

	proc = proc_from_msg($msg)
%( kernel_v >= "2.6.17" %?
	procname= $msg->rpc_proc->p_name 
		? kernel_string($msg->rpc_proc->p_name) : "NULL"
%)
	flags = $flags
	
	name = "sunrpc.clnt.call_async"
	argstr = sprintf("%s %d %s %d %s %d", servername, xid, progname, 
			vers, procname, flags)
}

probe sunrpc.clnt.call_async.return = 
	kernel.function("rpc_call_async").return !,
      	module("sunrpc").function("rpc_call_async").return
{
	name = "sunrpc.clnt.call_async.return"
	retstr = returnstr(1)
}

/*
 * Fires when an (async) RPC call is to be restarted
 *
 * void rpc_restart_call(struct rpc_task *task)
 *
 * @servername:   the server machine name
 * @prog:         the RPC program number
 * @xid:          the transmission id
 * @tk_pid:	  the debugging aid of task
 * @tk_flags:     the task flags
 * @tk_priority:  the task priority
 * @tk_runstate:  the task run status
 */
probe sunrpc.clnt.restart_call = kernel.function("rpc_restart_call") !,
      	module("sunrpc").function("rpc_restart_call")
{
	servername = kernel_string($task->tk_client->cl_server)
	prog = prog_from_clnt($task->tk_client)
	xid = $task->tk_rqstp->rq_xid
	tk_pid = $task->tk_pid
	tk_flags = $task->tk_flags
	tk_priority = $task->tk_priority
	tk_runstate = $task->tk_runstate

	name = "sunrpc.clnt.restart_call"
	argstr = sprintf("%s %d %d %d %d %d %d", servername, prog, xid, tk_pid, 
			tk_flags, tk_priority, tk_runstate)
}

probe sunrpc.clnt.restart_call.return = 
	kernel.function("rpc_restart_call").return !,
      	module("sunrpc").function("rpc_restart_call").return
{
	name = "sunrpc.clnt.restart_call.return"
}

/*********************************************
 *    Probe points on RPC server interface   *
 ********************************************/
probe sunrpc.svc.entry =
	sunrpc.svc.register,
	sunrpc.svc.create,
	sunrpc.svc.destroy,
	sunrpc.svc.process,
	sunrpc.svc.authorise,
	sunrpc.svc.recv,
	sunrpc.svc.send,
	sunrpc.svc.drop
{}

probe sunrpc.svc.return =
	sunrpc.svc.register.return,
	sunrpc.svc.create.return,
	sunrpc.svc.destroy.return,
	sunrpc.svc.process.return,
	sunrpc.svc.authorise.return,
	sunrpc.svc.recv.return,
	sunrpc.svc.send.return,
	sunrpc.svc.drop.return
{}

/*
 * Fires when an RPC service is to be registered with the local portmapper.
 * If proto and port == 0, it means to unregister a service.
 *
 * int svc_register(struct svc_serv *serv, int proto, unsigned short port)
 *
 * @sv_name:     the service name
 * @progname:    the name of the program
 * @prog:        the number of the program
 * @prot:	 the IP protocol number
 * @port:	 the port number
 */
probe sunrpc.svc.register = kernel.function("svc_register") !,
      	module("sunrpc").function("svc_register")
{
	sv_name = kernel_string($serv->sv_name)
	progname = kernel_string($serv->sv_program->pg_name)
	prog = $serv->sv_program->pg_prog
	prot = $proto
	port = $port

	name = "sunrpc.svc.register"
	argstr = sprintf("%s %s %d %d", sv_name, progname, prot, port)
}

probe sunrpc.svc.register.return = kernel.function("svc_register").return !,
      	module("sunrpc").function("svc_register").return
{
	name = "sunrpc.svc.register.return"
	retstr = returnstr(1)
}

/*
 * Fires when an RPC service is to be created
 *
 * struct svc_serv * 
 * svc_create(struct svc_program *prog, unsigned int bufsize)
 *
 * @progname:    the name of the program
 * @prog:        the number of the program
 * @pg_nvers:	 the number of supported versions
 * @bufsize:     the buffer size
 */
probe sunrpc.svc.create = kernel.function("svc_create") !,
      	module("sunrpc").function("svc_create")
{
	progname = kernel_string($prog->pg_name)
	prog = $prog->pg_prog
	pg_nvers  = $prog->pg_nvers
	bufsize = $bufsize
	
	name = "sunrpc.svc.create"
	argstr = sprintf("%s %d %d %d", progname, prog, pg_nvers, bufsize)
}

probe sunrpc.svc.create.return = kernel.function("svc_create").return !,
      	module("sunrpc").function("svc_create").return
{
	name = "sunrpc.svc.create.return"
	retstr = returnstr(2)
}

/*
 * Fires when an RPC service is to be destroyed
 *
 * void svc_destroy(struct svc_serv *serv)
 *
 * @sv_name:     the service name
 * @sv_progname: the name of the program
 * @sv_prog:     the number of the program
 * @sv_nrthreads:the number of concurrent threads
 * @netcnt:      the count of received RPC requests
 * @nettcpconn:  the count of accepted TCP connections
 * @rpccnt:      the count of valid RPC requests
 * @rpcbadfmt:   the count of requests dropped for bad formats
 * @rpcbadauth:  the count of requests drooped for authentication failure
 */
probe sunrpc.svc.destroy = kernel.function("svc_destroy") !,
      	module("sunrpc").function("svc_destroy")
{
	sv_name = kernel_string($serv->sv_name) /* service name */
	sv_progname = kernel_string($serv->sv_program->pg_name)
	sv_prog = $serv->sv_program->pg_prog
	sv_nrthreads = $serv->sv_nrthreads

	/* RPC statistics */
	netcnt = $serv->sv_stats->netcnt
	netcpconn = $serv->sv_stats->nettcpconn
	rpccnt = $serv->sv_stats->rpccnt
	rpcbadfmt = $serv->sv_stats->rpcbadfmt
	rpcbadauth = $serv->sv_stats->rpcbadauth
	
	name = "sunrpc.svc.destroy"
	argstr = sprintf("%s %d %d", sv_name, sv_prog, sv_nrthreads)
}

probe sunrpc.svc.destroy.return = kernel.function("svc_destroy").return !,
      	module("sunrpc").function("svc_destroy").return
{
	name = "sunrpc.svc.destroy.return"
}

/*
 * Fires when an RPC request is to be processed
 *
 * int svc_process(struct svc_serv *serv, struct svc_rqst *rqstp)
 *
 * @sv_name:     the service name
 * @sv_prog:     the number of the program
 * @sv_nrthreads:the number of concurrent threads
 * @peer_ip:     the peer address where the request is from
 * @rq_xid:      the transmission id in the request
 * @rq_prog:     the program number in the request
 * @rq_vers:     the program version in the request
 * @rq_proc:     the procedure number in the request
 * @rq_prot:     the IP protocol of the reqeust
 */
probe sunrpc.svc.process = kernel.function("svc_process") !,
      	module("sunrpc").function("svc_process")
{
%( kernel_v >= "2.6.19" %?
	sv_name = kernel_string($rqstp->rq_server->sv_name) /* service name */
	sv_prog = $rqstp->rq_server->sv_program->pg_prog
	sv_nrthreads = $rqstp->rq_server->sv_nrthreads
%:
	sv_name = kernel_string($serv->sv_name) /* service name */
	sv_prog = $serv->sv_program->pg_prog
	sv_nrthreads = $serv->sv_nrthreads
%)
	peer_ip = addr_from_rqst($rqstp)
	rq_xid = $rqstp->rq_xid
	rq_prog = $rqstp->rq_prog
	rq_vers = $rqstp->rq_vers
	rq_proc = $rqstp->rq_proc
	rq_prot = $rqstp->rq_prot
	
	name = "sunrpc.svc.process"
	argstr = sprintf("%s %d %d %d %d %d %d", sv_name, sv_prog, peer_ip,
			rq_xid, rq_prog, rq_vers, rq_proc)
}

probe sunrpc.svc.process.return = kernel.function("svc_process").return !,
      	module("sunrpc").function("svc_process").return
{
	name = "sunrpc.svc.process.return"
	retstr = returnstr(1)
}

/* 
 * Fires when an RPC request is to be authorised
 *
 * int svc_authorise(struct svc_rqst *rqstp)
 *
 * @sv_name:     the service name
 * @peer_ip:     the peer address where the request is from
 * @rq_xid:      the transmission id in the request
 * @rq_prog:     the program number in the request
 * @rq_vers:     the program version in the request
 * @rq_proc:     the procedure number in the request
 * @rq_prot:     the IP protocol of the reqeust
 */
probe sunrpc.svc.authorise = kernel.function("svc_authorise") !,
      	module("sunrpc").function("svc_authorise")
{
	sv_name = kernel_string($rqstp->rq_server->sv_name)
	peer_ip = addr_from_rqst($rqstp)
	rq_xid  = $rqstp->rq_xid
	rq_prog = $rqstp->rq_prog
	rq_vers = $rqstp->rq_vers
	rq_proc = $rqstp->rq_proc
	rq_prot = $rqstp->rq_prot

	name = "sunrpc.svc.authorise"
	argstr = sprintf("%d %d %d %d %d %d", peer_ip, rq_xid, rq_prog, 
			rq_vers, rq_proc, rq_prot)
}

probe sunrpc.svc.authorise.return = kernel.function("svc_authorise").return !,
      	module("sunrpc").function("svc_authorise").return
{
	name = "sunrpc.svc.authorise.return"
	retstr = returnstr(1)
}

/*
 * Fires when the server is to receive the next request on any socket.
 *
 * int svc_recv(struct svc_serv *serv, struct svc_rqst *rqstp, long timeout)
 *
 * @sv_name:     the service name
 * @sv_prog:     the number of the program
 * @sv_nrthreads:the number of concurrent threads
 * @timeout:     the timeout of waiting for data
 */
probe sunrpc.svc.recv = kernel.function("svc_recv") !,
      	module("sunrpc").function("svc_recv")
{
%( kernel_v >= "2.6.19" %?
        sv_name = kernel_string($rqstp->rq_server->sv_name) 
        sv_prog = $rqstp->rq_server->sv_program->pg_prog
        sv_nrthreads = $rqstp->rq_server->sv_nrthreads
%:
	sv_name = kernel_string($serv->sv_name)	
	sv_prog = $serv->sv_program->pg_prog
	sv_nrthreads = $serv->sv_nrthreads
%)
	timeout = $timeout

	name = "sunrpc.svc.recv"
	argstr = sprintf("%s %d", sv_name, timeout)
}

probe sunrpc.svc.recv.return = kernel.function("svc_recv").return !,
      	module("sunrpc").function("svc_recv").return
{
	name = "sunrpc.svc.recv.return"
	retstr = returnstr(1)
}

/*
 * Fires when want to return reply to client.
 *
 * int svc_send(struct svc_rqst *rqstp)
 *
 * @sv_name:     the service name
 * @peer_ip:     the peer address where the request is from
 * @rq_xid:      the transmission id in the request
 * @rq_prog:     the program number in the request
 * @rq_vers:     the program version in the request
 * @rq_proc:     the procedure number in the request
 * @rq_prot:     the IP protocol of the reqeust
 */
probe sunrpc.svc.send = kernel.function("svc_send") !,
      	module("sunrpc").function("svc_send")
{
	sv_name = kernel_string($rqstp->rq_server->sv_name)
	peer_ip = addr_from_rqst($rqstp)
	rq_xid  = $rqstp->rq_xid
	rq_prog = $rqstp->rq_prog
	rq_vers = $rqstp->rq_vers
	rq_proc = $rqstp->rq_proc
	rq_prot = $rqstp->rq_prot
	
	name = "sunrpc.svc.send"
	argstr = sprintf("%s %d %d %d %d %d %d", sv_name, peer_ip, 
			rq_xid, rq_prog, rq_vers, rq_proc, rq_prot)
}

probe sunrpc.svc.send.return = kernel.function("svc_send").return !,
      	module("sunrpc").function("svc_send").return
{
	name = "sunrpc.svc.send.return"
	retstr = returnstr(1)
}

/*
 * Fires when a request is to be dropped
 *
 * void svc_drop(struct svc_rqst *rqstp)
 *
 * @sv_name:     the service name
 * @peer_ip:     the peer address where the request is from
 * @rq_xid:      the transmission id in the request
 * @rq_prog:     the program number in the request
 * @rq_vers:     the program version in the request
 * @rq_proc:     the procedure number in the request
 * @rq_prot:     the IP protocol of the reqeust
 */
probe sunrpc.svc.drop = kernel.function("svc_drop") !,
      	module("sunrpc").function("svc_drop")
{
	sv_name = kernel_string($rqstp->rq_server->sv_name)
	peer_ip = addr_from_rqst($rqstp)
	rq_xid  = $rqstp->rq_xid
	rq_prog = $rqstp->rq_prog
	rq_vers = $rqstp->rq_vers
	rq_proc = $rqstp->rq_proc
	rq_prot = $rqstp->rq_prot
	
	name = "sunrpc.svc.drop"
	argstr = sprintf("%s %d %d %d %d %d %d", sv_name, peer_ip, 
			rq_xid, rq_prog, rq_vers, rq_proc, rq_prot)
}

probe sunrpc.svc.drop.return = kernel.function("svc_drop").return !,
      	module("sunrpc").function("svc_drop").return
{
	name = "sunrpc.svc.drop.return"
}

/*******************************************************************
 *                  Probe points on RPC scheduler                  *
 ******************************************************************/
probe sunrpc.sched.entry =
	sunrpc.sched.new_task,
	sunrpc.sched.release_task,
	sunrpc.sched.execute,
	sunrpc.sched.delay
{}

probe sunrpc.sched.return =
	sunrpc.sched.new_task.return,
	sunrpc.sched.release_task.return,
	sunrpc.sched.execute.return,
	sunrpc.sched.delay.return
{}

/*
 * Fires when a new task is to be created for the specified client.
 * 
 * struct rpc_task * rpc_new_task(struct rpc_clnt *clnt, int flags, 
 * 	const struct rpc_call_ops *tk_ops, void *calldata)
 *
 * @xid:         the transmission id in the RPC call
 * @prog:        the program number in the RPC call
 * @vers:        the program version in the RPC call
 * @prot:        the IP protocol in the RPC call
 * @tk_flags:    the flags of the task
 */
probe sunrpc.sched.new_task = kernel.function("rpc_new_task") !,
      	module("sunrpc").function("rpc_new_task")
{
	xid = xid_from_clnt($clnt)
	prog = prog_from_clnt($clnt)
	vers = vers_from_clnt($clnt)
	prot = prot_from_clnt($clnt)
	flags  = $flags

	name = "sunrpc.sched.new_task"
	argstr = sprintf("%d %d %d %d %d", xid, prog, vers, prot, flags)
}

probe sunrpc.sched.new_task.return = kernel.function("rpc_new_task").return !,
      	module("sunrpc").function("rpc_new_task").return
{
	name = "sunrpc.sched.new_task.return"
	retstr = returnstr(2)
}

/*
 * Fires when all resources associated with a task are to be released
 * 
 * void rpc_release_task(struct rpc_task *task)
 *
 * @xid:         the transmission id in the RPC call
 * @prog:        the program number in the RPC call
 * @vers:        the program version in the RPC call
 * @prot:        the IP protocol in the RPC call
 * @tk_flags:    the flags of the task
 */
probe sunrpc.sched.release_task = kernel.function("rpc_release_task") !,
      	module("sunrpc").function("rpc_release_task")
{
	xid = xid_from_clnt($task->tk_client)
	prog = prog_from_clnt($task->tk_client)
	vers = vers_from_clnt($task->tk_client)
	prot = prot_from_clnt($task->tk_client)
	tk_flags  = $task->tk_flags

	name = "sunrpc.sched.release_task"
	argstr = sprintf("%d %d %d %d %d", xid, prog, vers, prot, tk_flags)
}

probe sunrpc.sched.release_task.return = 
	kernel.function("rpc_release_task").return !,
      	module("sunrpc").function("rpc_release_task").return
{
	name = "sunrpc.sched.release_task.return"
}

/*
 * Fires when the RPC `scheduler'(or rather, the finite state machine) 
 * is to be executed 
 *
 * static int __rpc_execute(struct rpc_task *task)
 *
 * @xid:         the transmission id in the RPC call
 * @prog:        the program number in the RPC call
 * @vers:        the program version in the RPC call
 * @prot:        the IP protocol in the RPC call
 * @tk_pid:      the debugging id of the task
 * @tk_flags:    the flags of the task
 */
probe sunrpc.sched.execute = kernel.function("__rpc_execute") !,
      	module("sunrpc").function("__rpc_execute")
{
	xid = xid_from_clnt($task->tk_client)
	prog = prog_from_clnt($task->tk_client)
	vers = vers_from_clnt($task->tk_client)
	prot = prot_from_clnt($task->tk_client)
	tk_pid = $task->tk_pid
	tk_flags = $task->tk_flags

	name = "sunrpc.sched.execute"
	argstr = sprintf("%d %d %d %d %d %d", xid, prog, vers, prot, 
			tk_pid, tk_flags)
}

probe sunrpc.sched.execute.return = kernel.function("__rpc_execute").return !,
      	module("sunrpc").function("__rpc_execute").return
{
	name = "sunrpc.sched.execute.return"

%( kernel_v <= "2.6.20" %?
	retstr = returnstr(1)
%:
	retstr = "N/A"
%)
}

/*
 * Fires when a task is to be delayed
 * 
 * void rpc_delay(struct rpc_task *task, unsigned long delay)
 *
 * @xid:         the transmission id in the RPC call
 * @prog:        the program number in the RPC call
 * @vers:        the program version in the RPC call
 * @prot:        the IP protocol in the RPC call
 * @tk_pid:      the debugging id of the task
 * @tk_flags:    the flags of the task
 * @delay:       the time delayed
 */
probe sunrpc.sched.delay = kernel.function("rpc_delay") !,
      module("sunrpc").function("rpc_delay") 
{
	xid = xid_from_clnt($task->tk_client)
	prog = prog_from_clnt($task->tk_client)
	vers = vers_from_clnt($task->tk_client)
	prot = prot_from_clnt($task->tk_client)
	tk_pid = $task->tk_pid
	tk_flags = $task->tk_flags
	delay = $delay

	name = "sunrpc.sched.delay"
	argstr = sprintf("%d %d %d %d %d %d %d", xid, prog, vers, 
			prot, tk_pid, tk_flags, delay)
}

probe sunrpc.sched.delay.return = kernel.function("rpc_delay").return !,
      module("sunrpc").function("rpc_delay").return
{
	name = "sunrpc.sched.delay.return"
}

/******************************************************************
 *                       Helper functions                        *
 *****************************************************************/

function xid_from_clnt:long(clnt:long)
{
	if (clnt == 0)
		return 0
	return @cast(clnt, "rpc_clnt", "kernel:sunrpc")->cl_xprt->xid
}

function prog_from_clnt:long(clnt:long)
{
	if (clnt == 0)
		return 0
%(kernel_v  >= "2.6.19" %?
	return @cast(clnt, "rpc_clnt", "kernel:sunrpc")->cl_prog
%:
	return @cast(clnt, "rpc_clnt", "kernel:sunrpc")->cl_pmap->pm_prog
%)
}

function vers_from_clnt:long(clnt:long)
{
	if (clnt == 0)
		return 0
%(kernel_v  >= "2.6.19" %?
	return @cast(clnt, "rpc_clnt", "kernel:sunrpc")->cl_vers
%:
	return @cast(clnt, "rpc_clnt", "kernel:sunrpc")->cl_pmap->pm_vers
%)
}

function prot_from_clnt:long(clnt:long)
{
	if (clnt == 0)
		return 0
	return @cast(clnt, "rpc_clnt", "kernel:sunrpc")->cl_xprt->prot
}

function port_from_clnt:long(clnt:long)
%{ /* pure */
	struct rpc_clnt *clnt = (struct rpc_clnt *)(long)THIS->clnt;
	struct rpc_xprt *cl_xprt = clnt? kread(&(clnt->cl_xprt)) : NULL;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,19)
	if (cl_xprt && kread(&(cl_xprt->addr.ss_family)) == AF_INET) {
		/* Now consider ipv4 only */
		struct sockaddr_in *sap = (struct sockaddr_in *) &cl_xprt->addr;

		THIS->__retvalue = ntohs(kread(&(sap->sin_port)));
	}
#else
	if (cl_xprt && kread(&(cl_xprt->addr.sin_family)) == AF_INET) {
		/* Now consider ipv4 only */
		THIS->__retvalue = ntohs(kread(&(cl_xprt->addr.sin_port)));
	}
#endif
	else
		THIS->__retvalue = 0;
	CATCH_DEREF_FAULT();
%}

function clones_from_clnt:long(clnt:long)
%{ /* pure */
	struct rpc_clnt *clnt = (struct rpc_clnt *)(long)THIS->clnt;
        THIS->__retvalue = -1;
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,22)
	deref(sizeof(clnt->cl_count), &(clnt->cl_count));
	THIS->__retvalue = atomic_read(&(clnt->cl_count));
	CATCH_DEREF_FAULT();
#endif
%}

function tasks_from_clnt:long(clnt:long)
%{ /* pure */
	struct rpc_clnt *clnt = (struct rpc_clnt *)(long)THIS->clnt;
        THIS->__retvalue = -1;
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,22)
	deref(sizeof(clnt->cl_users), &(clnt->cl_users));
	THIS->__retvalue = atomic_read(&(clnt->cl_users));
	CATCH_DEREF_FAULT();
#endif
%}

function proc_from_msg:long(msg:long)
{
	if (msg == 0)
		return 0
	return @cast(msg, "rpc_message", "kernel:sunrpc")->rpc_proc->p_proc
}

function vers_from_prog:long(program:long, vers:long)
%{ /* pure */
	struct rpc_program *program = (struct rpc_program *)(long)THIS->program;
	if (program && THIS->vers < kread(&(program->nrvers))) {
		struct rpc_version **version_array = kread(&(program->version));
		struct rpc_version *version = kread(&(version_array[THIS->vers]));
		THIS->__retvalue = kread(&(version->number));
	} else
		THIS->__retvalue = 0;
	CATCH_DEREF_FAULT();
%}

function addr_from_rqst:long(rqstp:long)
%{ /* pure */
	struct svc_rqst *rqstp = (struct svc_rqst *)(long)THIS->rqstp;

	if (rqstp) {
		struct sockaddr_in *sin = (struct sockaddr_in *) &rqstp->rq_addr;

		THIS->__retvalue = kread(&sin->sin_addr.s_addr);
	} else
		THIS->__retvalue = 0;
	CATCH_DEREF_FAULT();
%}