4 # Copyright (c) 2008 Peter Holm <pho@FreeBSD.org>
7 # Redistribution and use in source and binary forms, with or without
8 # modification, are permitted provided that the following conditions
10 # 1. Redistributions of source code must retain the above copyright
11 # notice, this list of conditions and the following disclaimer.
12 # 2. Redistributions in binary form must reproduce the above copyright
13 # notice, this list of conditions and the following disclaimer in the
14 # documentation and/or other materials provided with the distribution.
16 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 # IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 # ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 # FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 # DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 # OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 # HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 # OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 [ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
36 # Test scenario by jhb@
40 sed '1,/^EOF/d' < $odir/$0 > nfsrename.c
41 cc -o nfsrename -Wall nfsrename.c
45 mount | grep "$mntpoint" | grep nfs > /dev/null && umount $mntpoint
46 mount -t nfs -o tcp -o retrycnt=3 -o intr -o soft -o rw 127.0.0.1:/tmp $mntpoint
49 #export RUNDIR=$mntpoint/stressX
51 #(cd /home/pho/stress2; ./run.sh disk.cfg) &
54 /tmp/nfsrename $mntpoint/nfsrename.$i &
60 rm -f $mntpoint/nfsrename.*
62 umount $mntpoint > /dev/null 2>&1
63 while mount | grep "$mntpoint" | grep -q nfs; do
64 umount -f $mntpoint > /dev/null 2>&1
72 * Try to expose races with doing renames over NFS that require silly
73 * renames. This results in 2 different RENAME RPCs leaving a race
74 * window where the file may not exist. It also appears that FreeBSD
75 * with shared lookups in NFS can get confused and possibly reference
76 * the sillyrenamed file in lookup but the file is deleted by the time
94 fprintf(stderr, "nfsrename: [-n children] file\n");
104 fp = fopen(filename, "r");
110 if (fread(buffer, sizeof(buffer), 1, fp) < sizeof(buffer))
114 warnx("fread encountered an error");
125 snprintf(path, sizeof(path), "%s/nfsrename.XXXXXX", dir);
132 fp = fdopen(fd, "w");
134 warn("fopen:writer");
139 fprintf(fp, "blah blah blah garbage %ld\n", random());
141 if (rename(path, filename) < 0) {
148 random_sleep(int base, int slop)
152 val = random() % slop;
161 random_sleep(500, 50);
168 main(int ac, char **av)
175 while ((ch = getopt(ac, av, "n:")) != -1) {
178 nchild = strtol(optarg, &cp, 0);
180 errx(1, "Invalid count %s", optarg);
191 errx(1, "Missing filename");
193 errx(1, "Extra arguments");
196 dir = dirname(filename);
200 for (i = 0; i < nchild; i++) {
209 for (i = 0; i < 10000; i++) {
210 random_sleep(1500, 1000);