1#!/bin/sh 2 3# 4# Copyright (c) 2018 Dell EMC Isilon 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28 29# fdatasync(2) fuzz. Variation of fdatasync.sh. 30# https://people.freebsd.org/~pho/stress/log/fdatasync2.txt 31 32[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 33 34. ../default.cfg 35 36dir=$RUNDIR 37nfiles=10000 38[ `df -i $dir | tail -1 | awk '{print $7}'` -lt $nfiles ] && exit 0 39 40odir=`pwd` 41cd /tmp 42sed '1,/^EOF/d' < $odir/$0 > fdatasync2.c 43rm -f /tmp/fdatasync2 44mycc -o fdatasync2 -Wall -Wextra -O2 -g fdatasync2.c -lpthread || exit 1 45rm -f fdatasync2.c 46 47mkdir -p $dir && chmod 777 $dir 48 49cd $dir 50jot $nfiles | xargs touch 51jot $nfiles | xargs chmod 666 52cd $odir 53 54(cd /tmp; /tmp/fdatasync2 $dir) 55e=$? 56 57rm -rf $dir/* /tmp/fdatasync2 58exit $e 59EOF 60#include <sys/param.h> 61#include <sys/resource.h> 62 63#include <err.h> 64#include <errno.h> 65#include <fcntl.h> 66#include <fts.h> 67#include <libutil.h> 68#include <pthread.h> 69#include <pwd.h> 70#include <stdint.h> 71#include <stdio.h> 72#include <stdlib.h> 73#include <string.h> 74#include <unistd.h> 75 76#define N (128 * 1024 / (int)sizeof(u_int32_t)) 77#define RUNTIME 180 78#define THREADS 6 79 80static int fd[900]; 81static u_int32_t r[N]; 82static char *args[2]; 83 84static unsigned long 85makearg(void) 86{ 87 unsigned long val; 88 89 val = arc4random(); 90#if defined(__LP64__) 91 val = (val << 32) | arc4random(); 92 val = val & 0x00007fffffffffffUL; 93#endif 94 95 return(val); 96} 97 98static void * 99test(void *arg __unused) 100{ 101 FTS *fts; 102 FTSENT *p; 103 int ftsoptions, i, n; 104 105 ftsoptions = FTS_PHYSICAL; 106 107 for (;;) { 108 for (i = 0; i < N; i++) 109 r[i] = arc4random(); 110 if ((fts = fts_open(args, ftsoptions, NULL)) == NULL) 111 err(1, "fts_open"); 112 113 i = n = 0; 114 while ((p = fts_read(fts)) != NULL) { 115 if (fd[i] > 0) 116 close(fd[i]); 117 if ((fd[i] = open(p->fts_path, O_RDWR)) == -1) 118 if ((fd[i] = open(p->fts_path, O_WRONLY)) == 119 -1) 120 continue; 121 if (ftruncate(fd[i], 0) != 0) 122 err(1, "ftruncate"); 123 i++; 124 i = i % nitems(fd); 125 } 126 127 if (fts_close(fts) == -1) 128 err(1, "fts_close()"); 129 sleep(1); 130 } 131 return(0); 132} 133 134static void * 135calls(void *arg __unused) 136{ 137 off_t offset; 138 time_t start; 139 int fd2; 140 141 start = time(NULL); 142 while ((time(NULL) - start) < RUNTIME) { 143 fd2 = makearg() % nitems(fd) + 3; 144 offset = makearg(); 145 if (lseek(fd2, offset - 1, SEEK_SET) != -1) { 146 if (write(fd2, "x", 1) != 1) 147 if (errno != EBADF && errno != ENOSPC && 148 errno != E2BIG && errno != ESTALE && 149 errno != EFBIG) 150 warn("write"); 151 } else 152 if (errno != EBADF) 153 warn("lseek"); 154 if (fdatasync(fd2) == -1) 155 if (errno != EBADF) 156 warn("x"); 157 158 } 159 160 return (0); 161} 162 163int 164main(int argc, char **argv) 165{ 166 struct passwd *pw; 167 pthread_t rp, cp[THREADS]; 168 int e, i, threads; 169 170 if (argc != 2) { 171 fprintf(stderr, "Usage: %s <dir>\n", argv[0]); 172 exit(1); 173 } 174 args[0] = argv[1]; 175 args[1] = 0; 176 threads = arc4random() % (THREADS -1 ) + 2; /* 2 - THREADS */ 177 178 if ((pw = getpwnam("nobody")) == NULL) 179 err(1, "failed to resolve nobody"); 180 if (setgroups(1, &pw->pw_gid) || 181 setegid(pw->pw_gid) || setgid(pw->pw_gid) || 182 seteuid(pw->pw_uid) || setuid(pw->pw_uid)) 183 err(1, "Can't drop privileges to \"nobody\""); 184 endpwent(); 185 186 if ((e = pthread_create(&rp, NULL, test, NULL)) != 0) 187 errc(1, e, "pthread_create"); 188 usleep(1000); 189 for (i = 0; i < threads; i++) 190 if ((e = pthread_create(&cp[i], NULL, calls, NULL)) != 0) 191 errc(1, e, "pthread_create"); 192 for (i = 0; i < threads; i++) 193 pthread_join(cp[i], NULL); 194 195 return (0); 196} 197