125a1b1f3SPeter Holm#!/bin/sh 225a1b1f3SPeter Holm 325a1b1f3SPeter Holm# 44d846d26SWarner Losh# SPDX-License-Identifier: BSD-2-Clause 525a1b1f3SPeter Holm# 625a1b1f3SPeter Holm# Copyright (c) 2022 Peter Holm <pho@FreeBSD.org> 725a1b1f3SPeter Holm# 825a1b1f3SPeter Holm# Redistribution and use in source and binary forms, with or without 925a1b1f3SPeter Holm# modification, are permitted provided that the following conditions 1025a1b1f3SPeter Holm# are met: 1125a1b1f3SPeter Holm# 1. Redistributions of source code must retain the above copyright 1225a1b1f3SPeter Holm# notice, this list of conditions and the following disclaimer. 1325a1b1f3SPeter Holm# 2. Redistributions in binary form must reproduce the above copyright 1425a1b1f3SPeter Holm# notice, this list of conditions and the following disclaimer in the 1525a1b1f3SPeter Holm# documentation and/or other materials provided with the distribution. 1625a1b1f3SPeter Holm# 1725a1b1f3SPeter Holm# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1825a1b1f3SPeter Holm# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1925a1b1f3SPeter Holm# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 2025a1b1f3SPeter Holm# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 2125a1b1f3SPeter Holm# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 2225a1b1f3SPeter Holm# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2325a1b1f3SPeter Holm# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2425a1b1f3SPeter Holm# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2525a1b1f3SPeter Holm# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2625a1b1f3SPeter Holm# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2725a1b1f3SPeter Holm# SUCH DAMAGE. 2825a1b1f3SPeter Holm# 2925a1b1f3SPeter Holm 3025a1b1f3SPeter Holm# https://reviews.freebsd.org/D35514 3125a1b1f3SPeter Holm# link() version 3225a1b1f3SPeter Holm 3325a1b1f3SPeter Holm. ../default.cfg 3425a1b1f3SPeter Holm 3525a1b1f3SPeter Holmcat > /tmp/nlink3.c <<EOF 3625a1b1f3SPeter Holm#include <sys/stat.h> 3725a1b1f3SPeter Holm#include <ufs/ufs/dinode.h> 3825a1b1f3SPeter Holm#include <err.h> 3925a1b1f3SPeter Holm#include <errno.h> 4025a1b1f3SPeter Holm#include <fcntl.h> 4125a1b1f3SPeter Holm#include <stdio.h> 4225a1b1f3SPeter Holm#include <unistd.h> 4325a1b1f3SPeter Holm 4425a1b1f3SPeter Holmint 4525a1b1f3SPeter Holmmain (void) { 4625a1b1f3SPeter Holm int fd, i, mx; 4725a1b1f3SPeter Holm char file[100]; 4825a1b1f3SPeter Holm 4925a1b1f3SPeter Holm snprintf(file, sizeof(file), "f"); 5025a1b1f3SPeter Holm if ((fd = open(file, O_RDWR | O_CREAT | O_TRUNC, 5125a1b1f3SPeter Holm DEFFILEMODE)) == -1) 5225a1b1f3SPeter Holm err(1, "creat(%s)", file); 5325a1b1f3SPeter Holm close(fd); 5425a1b1f3SPeter Holm 5549a83b94SPeter Holm mx = UFS_LINK_MAX - 1; 5625a1b1f3SPeter Holm for (i = 0; i < mx; i++) { 5725a1b1f3SPeter Holm snprintf(file, sizeof(file), "%d", i); 5825a1b1f3SPeter Holm if (link("f", file) == -1) 5925a1b1f3SPeter Holm err(1, "link(%s, %s)", "f", file); 6025a1b1f3SPeter Holm 6125a1b1f3SPeter Holm } 6225a1b1f3SPeter Holm 6325a1b1f3SPeter Holm /* The following link(2) must fail */ 6425a1b1f3SPeter Holm i = mx; 6525a1b1f3SPeter Holm snprintf(file, sizeof(file), "%d", i); 6625a1b1f3SPeter Holm if (link("f", file) != -1) 6725a1b1f3SPeter Holm err(1, "link(%s, %s)", "f", file); 6825a1b1f3SPeter Holm if (errno != EMLINK) 6925a1b1f3SPeter Holm err(1, "Must fail: link(%s, %s)", "f", file); 7025a1b1f3SPeter Holm 7125a1b1f3SPeter Holm i = 0; 7225a1b1f3SPeter Holm snprintf(file, sizeof(file), "%d", i); 7325a1b1f3SPeter Holm if (unlink(file) == -1) 7425a1b1f3SPeter Holm err(1, "unlink(%s)", file); 7525a1b1f3SPeter Holm 7625a1b1f3SPeter Holm /* Must succeed */ 7725a1b1f3SPeter Holm i = mx; 7825a1b1f3SPeter Holm snprintf(file, sizeof(file), "%d", i); 7925a1b1f3SPeter Holm if (link("f", file) == -1) 8025a1b1f3SPeter Holm err(1, "link(%s, %s)", "f", file); 8125a1b1f3SPeter Holm 8225a1b1f3SPeter Holm return (0); 8325a1b1f3SPeter Holm} 8425a1b1f3SPeter HolmEOF 8525a1b1f3SPeter Holmmycc -o /tmp/nlink3 -Wall -Wextra -O2 /tmp/nlink3.c || exit 1 8625a1b1f3SPeter Holmrm /tmp/nlink3.c 8725a1b1f3SPeter Holm 8825a1b1f3SPeter Holmset -e 8925a1b1f3SPeter Holmhere=`pwd` 9025a1b1f3SPeter Holmmount | grep -q "on $mntpoint " && umount -f $mntpoint 9125a1b1f3SPeter Holmmdconfig -l | grep "md$mdstart " && mdconfig -d -u $mdstart 9225a1b1f3SPeter Holmmdconfig -a -t swap -s 1g -u $mdstart 9325a1b1f3SPeter Holmnewfs -Un /dev/md$mdstart > /dev/null 9425a1b1f3SPeter Holmmount /dev/md$mdstart $mntpoint 9525a1b1f3SPeter Holmset +e 9625a1b1f3SPeter Holm 9725a1b1f3SPeter Holmcd $mntpoint 9825a1b1f3SPeter Holm/tmp/nlink3; s=$? 9925a1b1f3SPeter Holmn=`ls -a | wc -l` 10025a1b1f3SPeter Holm[ $s -ne 0 ] && echo "$n files" 10125a1b1f3SPeter Holmcd $here 10225a1b1f3SPeter Holm 10325a1b1f3SPeter Holmumount $mntpoint 10425a1b1f3SPeter Holmmdconfig -d -u $mdstart 10525a1b1f3SPeter Holmrm /tmp/nlink3 10625a1b1f3SPeter Holmexit $s 107