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 * $FreeBSD$ 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 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