1#!/bin/sh 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# $FreeBSD$ 31# 32# This script creates a trace of NFS RPCs, NFS attribute cache 33# activity, and NFS access cache activity, along with the system call 34# that instigated the activity. Notice that NFS events may happen 35# outside of the context of a system call, most likely due to the VM 36# system paging from NFS, in which case the system call name is 37# reported as "-" 38 39/usr/sbin/dtrace -n ' 40#pragma D option quiet 41 42dtrace:::BEGIN 43{ 44 printf("probe\targ0\texecutable\tsyscall\n"); 45} 46 47syscall:::entry 48{ 49 50 self->syscallname = probefunc; 51} 52 53syscall:::return 54{ 55 56 self->syscallname = ""; 57} 58 59nfsclient::: 60/self->syscallname != 0 && self->syscallname != ""/ 61{ 62 63 printf("%s\t%s\t%s\t%s\n", probemod, stringof(arg0), execname, 64 self->syscallname); 65} 66 67nfsclient::: 68/self->syscallname == 0 || self->syscallname == ""/ 69{ 70 71 printf("%s\t%s\t%s\t%s\n", probemod, stringof(arg0), execname, 72 self->syscallname); 73} 74' 75