1*25a1b1f3SPeter Holm#!/bin/sh 2*25a1b1f3SPeter Holm 3*25a1b1f3SPeter Holm# 4*25a1b1f3SPeter Holm# SPDX-License-Identifier: BSD-2-Clause-FreeBSD 5*25a1b1f3SPeter Holm# 6*25a1b1f3SPeter Holm# Copyright (c) 2022 Peter Holm <pho@FreeBSD.org> 7*25a1b1f3SPeter Holm# 8*25a1b1f3SPeter Holm# Redistribution and use in source and binary forms, with or without 9*25a1b1f3SPeter Holm# modification, are permitted provided that the following conditions 10*25a1b1f3SPeter Holm# are met: 11*25a1b1f3SPeter Holm# 1. Redistributions of source code must retain the above copyright 12*25a1b1f3SPeter Holm# notice, this list of conditions and the following disclaimer. 13*25a1b1f3SPeter Holm# 2. Redistributions in binary form must reproduce the above copyright 14*25a1b1f3SPeter Holm# notice, this list of conditions and the following disclaimer in the 15*25a1b1f3SPeter Holm# documentation and/or other materials provided with the distribution. 16*25a1b1f3SPeter Holm# 17*25a1b1f3SPeter Holm# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 18*25a1b1f3SPeter Holm# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19*25a1b1f3SPeter Holm# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20*25a1b1f3SPeter Holm# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 21*25a1b1f3SPeter Holm# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22*25a1b1f3SPeter Holm# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23*25a1b1f3SPeter Holm# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24*25a1b1f3SPeter Holm# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25*25a1b1f3SPeter Holm# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26*25a1b1f3SPeter Holm# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27*25a1b1f3SPeter Holm# SUCH DAMAGE. 28*25a1b1f3SPeter Holm# 29*25a1b1f3SPeter Holm 30*25a1b1f3SPeter Holm# https://reviews.freebsd.org/D35514 31*25a1b1f3SPeter Holm# link() version 32*25a1b1f3SPeter Holm 33*25a1b1f3SPeter Holm. ../default.cfg 34*25a1b1f3SPeter Holm 35*25a1b1f3SPeter Holmcat > /tmp/nlink3.c <<EOF 36*25a1b1f3SPeter Holm#include <sys/stat.h> 37*25a1b1f3SPeter Holm#include <ufs/ufs/dinode.h> 38*25a1b1f3SPeter Holm#include <err.h> 39*25a1b1f3SPeter Holm#include <errno.h> 40*25a1b1f3SPeter Holm#include <fcntl.h> 41*25a1b1f3SPeter Holm#include <stdio.h> 42*25a1b1f3SPeter Holm#include <unistd.h> 43*25a1b1f3SPeter Holm 44*25a1b1f3SPeter Holmint 45*25a1b1f3SPeter Holmmain (void) { 46*25a1b1f3SPeter Holm int fd, i, mx; 47*25a1b1f3SPeter Holm char file[100]; 48*25a1b1f3SPeter Holm 49*25a1b1f3SPeter Holm snprintf(file, sizeof(file), "f"); 50*25a1b1f3SPeter Holm if ((fd = open(file, O_RDWR | O_CREAT | O_TRUNC, 51*25a1b1f3SPeter Holm DEFFILEMODE)) == -1) 52*25a1b1f3SPeter Holm err(1, "creat(%s)", file); 53*25a1b1f3SPeter Holm close(fd); 54*25a1b1f3SPeter Holm 55*25a1b1f3SPeter Holm mx = UFS_LINK_MAX - 1; /* UFS_LINK_MAX = 32767 */ 56*25a1b1f3SPeter Holm for (i = 0; i < mx; i++) { 57*25a1b1f3SPeter Holm snprintf(file, sizeof(file), "%d", i); 58*25a1b1f3SPeter Holm if (link("f", file) == -1) 59*25a1b1f3SPeter Holm err(1, "link(%s, %s)", "f", file); 60*25a1b1f3SPeter Holm 61*25a1b1f3SPeter Holm } 62*25a1b1f3SPeter Holm 63*25a1b1f3SPeter Holm /* The following link(2) must fail */ 64*25a1b1f3SPeter Holm i = mx; 65*25a1b1f3SPeter Holm snprintf(file, sizeof(file), "%d", i); 66*25a1b1f3SPeter Holm if (link("f", file) != -1) 67*25a1b1f3SPeter Holm err(1, "link(%s, %s)", "f", file); 68*25a1b1f3SPeter Holm if (errno != EMLINK) 69*25a1b1f3SPeter Holm err(1, "Must fail: link(%s, %s)", "f", file); 70*25a1b1f3SPeter Holm 71*25a1b1f3SPeter Holm i = 0; 72*25a1b1f3SPeter Holm snprintf(file, sizeof(file), "%d", i); 73*25a1b1f3SPeter Holm if (unlink(file) == -1) 74*25a1b1f3SPeter Holm err(1, "unlink(%s)", file); 75*25a1b1f3SPeter Holm 76*25a1b1f3SPeter Holm /* Must succeed */ 77*25a1b1f3SPeter Holm i = mx; 78*25a1b1f3SPeter Holm snprintf(file, sizeof(file), "%d", i); 79*25a1b1f3SPeter Holm if (link("f", file) == -1) 80*25a1b1f3SPeter Holm err(1, "link(%s, %s)", "f", file); 81*25a1b1f3SPeter Holm 82*25a1b1f3SPeter Holm return (0); 83*25a1b1f3SPeter Holm} 84*25a1b1f3SPeter HolmEOF 85*25a1b1f3SPeter Holmmycc -o /tmp/nlink3 -Wall -Wextra -O2 /tmp/nlink3.c || exit 1 86*25a1b1f3SPeter Holmrm /tmp/nlink3.c 87*25a1b1f3SPeter Holm 88*25a1b1f3SPeter Holmset -e 89*25a1b1f3SPeter Holmhere=`pwd` 90*25a1b1f3SPeter Holmmount | grep -q "on $mntpoint " && umount -f $mntpoint 91*25a1b1f3SPeter Holmmdconfig -l | grep "md$mdstart " && mdconfig -d -u $mdstart 92*25a1b1f3SPeter Holmmdconfig -a -t swap -s 1g -u $mdstart 93*25a1b1f3SPeter Holmnewfs -Un /dev/md$mdstart > /dev/null 94*25a1b1f3SPeter Holmmount /dev/md$mdstart $mntpoint 95*25a1b1f3SPeter Holmset +e 96*25a1b1f3SPeter Holm 97*25a1b1f3SPeter Holmcd $mntpoint 98*25a1b1f3SPeter Holm/tmp/nlink3; s=$? 99*25a1b1f3SPeter Holmn=`ls -a | wc -l` 100*25a1b1f3SPeter Holm[ $s -ne 0 ] && echo "$n files" 101*25a1b1f3SPeter Holmcd $here 102*25a1b1f3SPeter Holm 103*25a1b1f3SPeter Holmumount $mntpoint 104*25a1b1f3SPeter Holmmdconfig -d -u $mdstart 105*25a1b1f3SPeter Holmrm /tmp/nlink3 106*25a1b1f3SPeter Holmexit $s 107