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