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The SPDX folks have obsoleted the BSD-2-Clause-FreeBSD identifier. Catch up to that fact and revert to their recommended match of BSD-2-Clause. Discussed with: pfg MFC After: 3 days Sponsored by: Netflix
125 lines
4.1 KiB
Bash
Executable file
125 lines
4.1 KiB
Bash
Executable file
#!/bin/sh
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#
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# SPDX-License-Identifier: BSD-2-Clause
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#
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# Copyright (c) 2020 Mark Johnston <markj@FreeBSD.org>
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# "Fatal trap 9: general protection fault while in kernel mode" seen:
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# https://people.freebsd.org/~pho/stress/log/sendfile15-4.txt
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# Mark wrote:
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# It took me some time but I managed to get a repro. Here is what I did:
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# - Create a malloc-backed md(4) device with a UFS filesystem. Configure
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# a gnop provider with -q 100 -d 10, i.e., always delay reads by 10ms.
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# - Write a small file (e.g., 4KB) to the filesystem.
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# - In a loop, unmount the filesystem, mount it, and run the test program.
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# The test program:
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# - creates a PF_LOCAL socket pair <s1, s2>,
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# - opens the input file,
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# - sends the file over s1,
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# - closes s1,
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# - sleeps for a second before exiting (and closing s2)
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#
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# Using a separate filesystem ensures that the input file is not cached
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# when the test program runs, so sendfile will perform an async getpages
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# and place the "future" mbufs in s2's receive buffer. The gnop delay
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# ensures that the I/O request will not be completed before s1 is closed,
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# and because s1 is closed uipc_ready() will free the promised mbufs and
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# return ECONNRESET. Because of the sleep, s2's receive buffer will not
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# be scanned until after the uipc_ready() call.
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# Fixed by r359778
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[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1
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kldstat | grep -q geom_nop || { gnop load 2>/dev/null || exit 0 &&
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notloaded=1; }
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gnop status || exit 1
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. ../default.cfg
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dir=/tmp
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odir=`pwd`
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cd $dir
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sed '1,/^EOF/d' < $odir/$0 > $dir/sendfile18.c
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mycc -o sendfile18 -Wall -Wextra -O0 -g sendfile18.c || exit 1
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rm -f sendfile18.c
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cd $odir
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set -e
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mount | grep $mntpoint | grep -q /dev/md && umount -f $mntpoint
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[ -c /dev/md$mdstart ] && mdconfig -d -u $mdstart
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mdconfig -a -t swap -s 2g -u $mdstart
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gnop create /dev/md$mdstart
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newfs $newfs_flags /dev/md$mdstart.nop > /dev/null
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mount /dev/md$mdstart.nop $mntpoint
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chmod 777 $mntpoint
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gnop configure -q 100 -d 10 /dev/md$mdstart.nop
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set +e
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dd if=/dev/zero of=$mntpoint/file bs=4k count=1 status=none
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start=`date +%s`
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while [ $((`date +%s` - start)) -lt 5 ]; do
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umount $mntpoint
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mount /dev/md$mdstart.nop $mntpoint
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/tmp/sendfile18 $mntpoint/file
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done
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umount $mntpoint
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gnop destroy /dev/md$mdstart.nop
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mdconfig -d -u $mdstart
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rm $dir/sendfile18
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[ $notloaded ] && gnop unload
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exit 0
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EOF
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#include <sys/socket.h>
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#include <err.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <unistd.h>
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int
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main(int argc __unused, char **argv)
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{
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int fd, sd[2];
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if (socketpair(PF_LOCAL, SOCK_STREAM, 0, sd) != 0)
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err(1, "socketpair");
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fd = open(argv[1], O_RDONLY | O_DIRECT);
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if (fd < 0)
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err(1, "open");
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if (sendfile(fd, sd[0], 0, 4096, NULL, NULL, 0) != 0)
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err(1, "sendfile");
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close(sd[0]);
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sleep(1);
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return (0);
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}
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