18a272653SPeter Holm#!/bin/sh 28a272653SPeter Holm 38a272653SPeter Holm# 48a272653SPeter Holm# Copyright (c) 2011 Peter Holm <pho@FreeBSD.org> 58a272653SPeter Holm# All rights reserved. 68a272653SPeter Holm# 78a272653SPeter Holm# Redistribution and use in source and binary forms, with or without 88a272653SPeter Holm# modification, are permitted provided that the following conditions 98a272653SPeter Holm# are met: 108a272653SPeter Holm# 1. Redistributions of source code must retain the above copyright 118a272653SPeter Holm# notice, this list of conditions and the following disclaimer. 128a272653SPeter Holm# 2. Redistributions in binary form must reproduce the above copyright 138a272653SPeter Holm# notice, this list of conditions and the following disclaimer in the 148a272653SPeter Holm# documentation and/or other materials provided with the distribution. 158a272653SPeter Holm# 168a272653SPeter Holm# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 178a272653SPeter Holm# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 188a272653SPeter Holm# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 198a272653SPeter Holm# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 208a272653SPeter Holm# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 218a272653SPeter Holm# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 228a272653SPeter Holm# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 238a272653SPeter Holm# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 248a272653SPeter Holm# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 258a272653SPeter Holm# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 268a272653SPeter Holm# SUCH DAMAGE. 278a272653SPeter Holm# 288a272653SPeter Holm 298a272653SPeter Holm# Looping mksnap_ffs seen. 308a272653SPeter Holm 318a272653SPeter Holm[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 328a272653SPeter Holm 338a272653SPeter Holm. ../default.cfg 348a272653SPeter Holm 358a272653SPeter Holm# Scenario by mckusick@ 368a272653SPeter Holm# 378a272653SPeter Holm# create a bunch of files/directories 388a272653SPeter Holm# create a snapshot 398a272653SPeter Holm# remove many (but not all) of those files/directories 408a272653SPeter Holm# create some new files/directories in what remains of those 418a272653SPeter Holm# original files/directories. 428a272653SPeter Holm# create another snapshot 438a272653SPeter Holm# repeat { 448a272653SPeter Holm# remove many (somewhat different) of those files/directories 458a272653SPeter Holm# create some new files/directories in what remains of those 468a272653SPeter Holm# remaining files/directories. 478a272653SPeter Holm# create a new snapshot 488a272653SPeter Holm# remove oldest snapshot 498a272653SPeter Holm# } 508a272653SPeter Holm 518a272653SPeter Holmsnap () { 528a272653SPeter Holm for i in `jot 5`; do 538a272653SPeter Holm mksnap_ffs $1 $2 2>&1 | grep -v "Resource temporarily unavailable" 548a272653SPeter Holm [ ! -s $2 ] && rm -f $2 || return 0 558a272653SPeter Holm sleep 1 568a272653SPeter Holm done 578a272653SPeter Holm return 1 588a272653SPeter Holm} 598a272653SPeter Holm 608a272653SPeter Holmhere=`pwd` 618a272653SPeter Holmcd /tmp 628a272653SPeter Holmsed '1,/^EOF/d' < $here/$0 > suj20.c 638a272653SPeter Holmmycc -o suj20 -Wall -Wextra -g -O2 suj20.c 648a272653SPeter Holmrm -f suj20.c 658a272653SPeter Holm 668a272653SPeter Holmmount | grep "$mntpoint" | grep -q md$mdstart && umount $mntpoint 678a272653SPeter Holmmdconfig -l | grep -q md$mdstart && mdconfig -d -u $mdstart 688a272653SPeter Holm 698a272653SPeter Holmmdconfig -a -t swap -s 1g -u $mdstart 70*608c97bfSPeter Holmnewfs -j md$mdstart > /dev/null 71*608c97bfSPeter Holmmount /dev/md$mdstart $mntpoint 728a272653SPeter Holm 738a272653SPeter Holmcd $mntpoint 748a272653SPeter Holmchmod 777 $mntpoint 758a272653SPeter Holm/tmp/suj20 768a272653SPeter Holmsnap $mntpoint $mntpoint/.snap/snap1 778a272653SPeter Holm/tmp/suj20 prune 788a272653SPeter Holmsnap $mntpoint $mntpoint/.snap/snap2 798a272653SPeter Holm/tmp/suj20 808a272653SPeter Holmfor i in `jot 10`; do 818a272653SPeter Holm /tmp/suj20 prune 828a272653SPeter Holm /tmp/suj20 838a272653SPeter Holm snap $mntpoint $mntpoint/.snap/snap$((i + 2)) 848a272653SPeter Holm sn=`ls -tU $mntpoint/.snap | tail -1` 858a272653SPeter Holm rm -f $mntpoint/.snap/$sn 868a272653SPeter Holmdone 878a272653SPeter Holmcd $here 888a272653SPeter Holm 898a272653SPeter Holmwhile mount | grep -q $mntpoint; do 908a272653SPeter Holm umount $mntpoint || sleep 1 918a272653SPeter Holmdone 928a272653SPeter Holmmdconfig -d -u $mdstart 938a272653SPeter Holmrm -f /tmp/suj20 948a272653SPeter Holmexit 0 958a272653SPeter HolmEOF 968a272653SPeter Holm#include <sys/types.h> 978a272653SPeter Holm#include <err.h> 988a272653SPeter Holm#include <errno.h> 998a272653SPeter Holm#include <fcntl.h> 1008a272653SPeter Holm#include <stdio.h> 1018a272653SPeter Holm#include <stdlib.h> 1028a272653SPeter Holm#include <sys/stat.h> 1038a272653SPeter Holm#include <unistd.h> 1048a272653SPeter Holm 1058a272653SPeter Holmstatic char buf[4096]; 1068a272653SPeter Holm#define ND 100 1078a272653SPeter Holm#define NF 100 1088a272653SPeter Holm 1098a272653SPeter Holmvoid 1108a272653SPeter Holmsetup(void) 1118a272653SPeter Holm{ 1128a272653SPeter Holm int d, f, fd, i, n; 1138a272653SPeter Holm char name[128]; 1148a272653SPeter Holm 1158a272653SPeter Holm for (d = 0; d < ND; d++) { 1168a272653SPeter Holm snprintf(name, sizeof(name), "d%03d", d); 1178a272653SPeter Holm if (mkdir(name, 00700) == -1 && errno != EEXIST) 1188a272653SPeter Holm err(1, "mkdir(%s)", name); 1198a272653SPeter Holm if (chdir(name) == -1) 1208a272653SPeter Holm err(1, "chdir(%s)", name); 1218a272653SPeter Holm for (f = 0; f < NF; f++) { 1228a272653SPeter Holm if (arc4random() % 100 < 33) 1238a272653SPeter Holm continue; 1248a272653SPeter Holm snprintf(name, sizeof(name), "f%03d", f); 1258a272653SPeter Holm if ((fd = open(name, O_RDWR | O_CREAT | O_TRUNC, 0640)) == -1) 1268a272653SPeter Holm err(1, "open(%s)", name); 1278a272653SPeter Holm n = arc4random() % 10; 1288a272653SPeter Holm for (i = 0; i < n; i++) { 1298a272653SPeter Holm if (write(fd, buf, sizeof(buf)) != sizeof(buf)) 1308a272653SPeter Holm err(1, "write()"); 1318a272653SPeter Holm } 1328a272653SPeter Holm close(fd); 1338a272653SPeter Holm } 1348a272653SPeter Holm if (chdir("..") == -1) 1358a272653SPeter Holm err(1, "chdir(%s)", ".."); 1368a272653SPeter Holm } 1378a272653SPeter Holm} 1388a272653SPeter Holmvoid 1398a272653SPeter Holm 1408a272653SPeter Holmprune(void) 1418a272653SPeter Holm{ 1428a272653SPeter Holm int d, f; 1438a272653SPeter Holm char name[128]; 1448a272653SPeter Holm 1458a272653SPeter Holm for (d = 0; d < ND; d++) { 1468a272653SPeter Holm snprintf(name, sizeof(name), "d%03d", d); 1478a272653SPeter Holm if (chdir(name) == -1) 1488a272653SPeter Holm err(1, "chdir(%s)", name); 1498a272653SPeter Holm for (f = 0; f < NF; f++) { 1508a272653SPeter Holm if (arc4random() % 100 < 33) 1518a272653SPeter Holm continue; 1528a272653SPeter Holm snprintf(name, sizeof(name), "f%03d", f); 1538a272653SPeter Holm if (unlink(name) == -1 && errno != ENOENT) 1548a272653SPeter Holm err(1, "unlink(%s)", name); 1558a272653SPeter Holm } 1568a272653SPeter Holm if (chdir("..") == -1) 1578a272653SPeter Holm err(1, "chdir(%s)", ".."); 1588a272653SPeter Holm } 1598a272653SPeter Holm for (d = 0; d < ND; d++) { 1608a272653SPeter Holm if (arc4random() % 100 > 10) 1618a272653SPeter Holm continue; 1628a272653SPeter Holm snprintf(name, sizeof(name), "rm -rf d%03d", d); 1638a272653SPeter Holm system(name); 1648a272653SPeter Holm } 1658a272653SPeter Holm} 1668a272653SPeter Holm 1678a272653SPeter Holmint 1688a272653SPeter Holmmain(int argc, char **argv __unused) 1698a272653SPeter Holm{ 1708a272653SPeter Holm if (argc == 1) 1718a272653SPeter Holm setup(); 1728a272653SPeter Holm if (argc == 2) 1738a272653SPeter Holm prune(); 1748a272653SPeter Holm 1758a272653SPeter Holm return (0); 1768a272653SPeter Holm} 177