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|
#!/bin/sh
#
# Copyright (c) 2008 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.
#
# Test scenario by kib@freebsd.org
# Test of patch for Giant trick in cdevsw
[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
[ -d /usr/src/sys ] || exit 0
builddir=`sysctl kern.version | grep @ | sed 's/.*://'`
[ -d "$builddir" ] && export KERNBUILDDIR=$builddir || exit 0
export SYSDIR=`echo $builddir | sed 's#/sys.*#/sys#'`
kldstat -v | grep -q pty || { kldload pty || exit 0; }
. ../default.cfg
odir=`pwd`
dir=$RUNDIR/fpclone
[ ! -d $dir ] && mkdir -p $dir
cd $dir
cat > Makefile <<EOF
KMOD= fpclone
SRCS= fpclone.c
.include <bsd.kmod.mk>
EOF
sed '1,/^EOF2/d' < $odir/$0 > fpclone.c
make
kldload $dir/fpclone.ko
cd $odir
for i in `jot 10`; do
dd if=/dev/fpclone bs=1m count=10 > /dev/null 2>&1 &
done
export runRUNTIME=2m
cd ..; ./run.sh pty.cfg
for i in `jot 10`; do
wait
done
kldstat
dd if=/dev/fpclone bs=1m count=1k > /dev/null 2>&1 &
kldunload $dir/fpclone.ko
rm -rf $dir
exit
EOF2
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/conf.h>
#include <sys/uio.h>
#include <sys/malloc.h>
static d_open_t fpclone_open;
static d_close_t fpclone_close;
static d_read_t fpclone_read;
static struct cdevsw fpclone_cdevsw = {
.d_open = fpclone_open,
.d_close = fpclone_close,
.d_read = fpclone_read,
.d_name = "fpclone",
.d_version = D_VERSION,
.d_flags = D_TRACKCLOSE
};
MALLOC_DEFINE(M_FPCLONESC, "fpclone memory", "fpclone memory");
struct fpclone_sc
{
int pos;
};
static struct cdev *fpclone_dev;
static struct mtx me;
static void
fpclone_cdevpriv_dtr(void *data)
{
free(data, M_FPCLONESC);
}
static int
fpclone_open(struct cdev *dev, int oflags, int devtype, struct thread *td)
{
struct fpclone_sc *sc;
int error;
sc = malloc(sizeof(struct fpclone_sc), M_FPCLONESC,
M_WAITOK | M_ZERO);
error = devfs_set_cdevpriv(sc, fpclone_cdevpriv_dtr);
if (error)
fpclone_cdevpriv_dtr(sc);
return (error);
}
static int
fpclone_close(struct cdev *dev, int fflag, int devtype, struct thread *td)
{
devfs_clear_cdevpriv();
return (0);
}
static char rdata[] = "fpclone sample data string\n";
static int
fpclone_read(struct cdev *dev, struct uio *uio, int ioflag)
{
struct fpclone_sc *sc;
int rv, amnt, svpos, error;
error = devfs_get_cdevpriv((void **)&sc);
if (error)
return (error);
rv = 0;
while (uio->uio_resid > 0) {
svpos = sc->pos;
amnt = MIN(uio->uio_resid, sizeof(rdata) - svpos);
rv = uiomove(rdata + svpos, amnt, uio);
if (rv != 0)
break;
mtx_lock(&me);
sc->pos += amnt;
sc->pos %= sizeof(rdata);
mtx_unlock(&me);
}
return (rv);
}
static int
fpclone_modevent(module_t mod, int what, void *arg)
{
switch (what) {
case MOD_LOAD:
mtx_init(&me, "fp_ref", NULL, MTX_DEF);
fpclone_dev = make_dev(&fpclone_cdevsw, 0, 0, 0, 0666,
"fpclone");
return(0);
case MOD_UNLOAD:
destroy_dev(fpclone_dev);
mtx_destroy(&me);
return (0);
default:
break;
}
return (0);
}
moduledata_t fpclone_mdata = {
"fpclone",
fpclone_modevent,
NULL
};
DECLARE_MODULE(fpclone, fpclone_mdata, SI_SUB_DRIVERS, SI_ORDER_MIDDLE);
MODULE_VERSION(fpclone, 1);
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