1#!/usr/sbin/dtrace -s
2/*
3 * Copyright (c) 2012 Robert N. M. Watson
4 * All rights reserved.
5 *
6 * This software was developed at the University of Cambridge Computer
7 * Laboratory with support from a grant from Google, Inc.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 * SUCH DAMAGE.
29 *
30 * This script creates a trace of NFS RPCs, NFS attribute cache
31 * activity, and NFS access cache activity, along with the system call
32 * that instigated the activity. Notice that NFS events may happen
33 * outside of the context of a system call, most likely due to the VM
34 * system paging from NFS, in which case the system call name is
35 * reported as "-"
36 */
37
38#pragma D option quiet
39
40dtrace:::BEGIN
41{
42	printf("probe\targ0\texecutable\tsyscall\n");
43}
44
45syscall:::entry
46{
47
48        self->syscallname = probefunc;
49}
50
51syscall:::return
52{
53
54        self->syscallname = "";
55}
56
57nfscl:::
58/self->syscallname != 0 && self->syscallname != ""/
59{
60
61    printf("%s\t%s\t%s\t%s\n", probemod, stringof(arg0), execname, 
62	    self->syscallname);
63}
64
65nfscl:::
66/self->syscallname == 0 || self->syscallname == ""/
67{
68
69    printf("%s\t%s\t%s\t%s\n", probemod, stringof(arg0), execname, 
70	    self->syscallname);
71}
72