Date: Fri, 11 Jan 2013 14:01:07 +0000 (UTC) From: Peter Holm <pho@FreeBSD.org> To: src-committers@freebsd.org, svn-src-user@freebsd.org Subject: svn commit: r245301 - user/pho/stress2/misc Message-ID: <201301111401.r0BE17QE021005@svn.freebsd.org>
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Author: pho Date: Fri Jan 11 14:01:07 2013 New Revision: 245301 URL: http://svnweb.freebsd.org/changeset/base/245301 Log: Change mount point from rw to ro with a file mapped rw. Added: user/pho/stress2/misc/mountu.sh (contents, props changed) Added: user/pho/stress2/misc/mountu.sh ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ user/pho/stress2/misc/mountu.sh Fri Jan 11 14:01:07 2013 (r245301) @@ -0,0 +1,164 @@ +#!/bin/sh + +# +# Copyright (c) 2012 Peter Holm <pho@FreeBSD.org> +# All rights reserved. +# +# Redistribution and use in source and binary forms, with or without +# modification, are permitted provided that the following conditions +# are met: +# 1. Redistributions of source code must retain the above copyright +# notice, this list of conditions and the following disclaimer. +# 2. Redistributions in binary form must reproduce the above copyright +# notice, this list of conditions and the following disclaimer in the +# documentation and/or other materials provided with the distribution. +# +# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND +# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE +# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE +# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE +# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS +# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) +# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT +# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY +# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF +# SUCH DAMAGE. +# +# $FreeBSD$ +# + +# Change mount point from rw to ro with a file mapped rw +# Currently fails for NFS + +[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1 + +. ../default.cfg + +here=`pwd` +cd /tmp +sed '1,/^EOF/d' < $here/$0 > mountu.c +cc -o mountu -Wall -Wextra -O2 mountu.c +rm -f mountu.c + +pstat() { + pid=`ps a | grep -v grep | grep /tmp/mountu | awk '{print $1}'` + [ -n "$pid" ] && procstat -v $pid +} + +mount | grep -q "$mntpoint " && umount $mntpoint +mdconfig -l | grep -q $mdstart && mdconfig -d -u $mdstart +mdconfig -a -t swap -s 100m -u $mdstart +bsdlabel -w md${mdstart} auto +newfs -U md${mdstart}${part} > /dev/null +mount /dev/md${mdstart}${part} $mntpoint +chmod 777 $mntpoint + +/tmp/mountu $mntpoint/file & + +sleep 1 +if ! mount -u -o ro $mntpoint 2>&1 | grep -q "Device busy"; then + echo "UFS FAILED" + pstat +fi +wait +while mount | grep -q "$mntpoint "; do + umount $mntpoint || sleep 1 +done + +mdconfig -d -u $mdstart + +mount -t nfs -o tcp -o retrycnt=3 -o intr -o soft -o rw 127.0.0.1:/tmp $mntpoint +rm -f /tmp/file +/tmp/mountu $mntpoint/file & +sleep 1 + +if ! mount -u -o ro $mntpoint 2>&1 | grep -q "Device busy"; then + echo "NFS FAILED" + pstat +fi +wait +umount $mntpoint + +mdconfig -a -t swap -s 100m -u $mdstart +bsdlabel -w md${mdstart} auto +newfs_msdos -F 16 -b 8192 /dev/md${mdstart}a > /dev/null 2>&1 +mount_msdosfs -m 777 /dev/md${mdstart}a $mntpoint +/tmp/mountu $mntpoint/file & + +sleep 1 +if ! mount -u -o ro $mntpoint 2>&1 | grep -q "Device busy"; then + echo "MSDOS FAILED" + pstat +fi +wait + +while mount | grep -q "$mntpoint "; do + umount $mntpoint || sleep 1 +done +rm -f /tmp/mountu /tmp/file +exit 0 +EOF +#include <sys/types.h> +#include <err.h> +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <fcntl.h> +#include <pwd.h> +#include <sys/mman.h> +#include <sys/param.h> +#include <string.h> +#include <unistd.h> +#include <errno.h> + +#define STARTADDR 0x0U +#define ADRSPACE 0x0640000U + +int +main(int argc __unused, char **argv) +{ + int fd, ps; + void *p; + size_t len; + struct passwd *pw; + char *c, *path; + + if ((pw = getpwnam("nobody")) == NULL) + err(1, "no such user: nobody"); + + if (setgroups(1, &pw->pw_gid) || + setegid(pw->pw_gid) || setgid(pw->pw_gid) || + seteuid(pw->pw_uid) || setuid(pw->pw_uid)) + err(1, "Can't drop privileges to \"nobody\""); + endpwent(); + + p = (void *)STARTADDR; + len = ADRSPACE; + + path = argv[1]; + if ((fd = open(path, O_CREAT | O_TRUNC | O_RDWR, 0622)) == -1) + err(1,"open(%s)", path); + if (ftruncate(fd, len) == -1) + err(1, "ftruncate"); + if ((p = mmap(p, len, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0)) == + MAP_FAILED) { + if (errno == ENOMEM) { + warn("mmap()"); + return (1); + } + err(1, "mmap(1)"); + } +// fprintf(stderr, "%s mapped to %p\n", path, p); + + c = p; + ps = getpagesize(); + for (c = p; (void *)c < p + len; c += ps) { + *c = 1; + } + + close(fd); + sleep(5); + + return (0); +}
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