1 files changed, 231 insertions, 0 deletions
diff --git a/tools/test/stress2/misc/write.sh b/tools/test/stress2/misc/write.sh
new file mode 100755
index 000000000000..9fb1cb7be61a
--- /dev/null
+++ b/tools/test/stress2/misc/write.sh
@@ -0,0 +1,231 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2016 EMC Corp.
+# 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.
+#
+
+# Parallel write test.
+
+# fsync: giving up on dirty
+# 0xc9172168: tag devfs, type VCHR
+#     usecount 1, writecount 0, refcount 31 mountedhere 0xc96bd300
+#     flags (VI_ACTIVE)
+#     v_object 0xc96e55a0 ref 0 pages 983 cleanbuf 27 dirtybuf 2
+#     lock type devfs: EXCL by thread 0xcbedf340 (pid 58752, write, tid 100254)
+# #0 0xc0c23f33 at __lockmgr_args+0xae3
+# #1 0xc0cff943 at vop_stdlock+0x53
+# #2 0xc12027c8 at VOP_LOCK1_APV+0x118
+# #3 0xc0d2400a at _vn_lock+0xba
+# #4 0xc0f3288b at ffs_sync+0x34b
+# #5 0xc0f16cc5 at softdep_ast_cleanup_proc+0x205
+# #6 0xc0ca3ac7 at userret+0x37
+# #7 0xc11d021e at syscall+0x50e
+# #8 0xc11bae3f at Xint0x80_syscall+0x2f
+#         dev label/tmp
+
+# Deadlock seen:
+# https://people.freebsd.org/~pho/stress/log/write.txt
+
+. ../default.cfg
+
+dir=/tmp
+odir=`pwd`
+cd $dir
+sed '1,/^EOF/d' < $odir/$0 > $dir/write.c
+mycc -o write -Wall -Wextra -O2 -g write.c || exit 1
+rm -f write.c
+cd $odir
+
+need=$((25 * 1024))
+[ `df -k $(dirname $diskimage) | tail -1 | awk '{print int($4 / 1024)}'` \
+    -lt $need ] &&
+    printf "Need %d MB on %s.\n" $need `dirname $diskimage` && exit 0
+wd=`dirname $diskimage`
+wd="$wd/write.dir"
+rm -rf $wd
+mkdir -p $wd
+
+(cd $wd; /tmp/write)
+s=$?
+
+rm -rf /tmp/write $wd
+exit $s
+
+EOF
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+#include <machine/atomic.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+#define DONE 1
+#define MAXBLK (2 * 1024 * 1024)
+#define MAXPROC 32
+#define MAXSIZ (9LL * 1024 * 1024 *1024)
+#define RUNTIME (15 * 60)
+#define SYNC 0
+
+volatile u_int *share;
+int parallel;
+
+struct typ {
+	off_t blocksize;
+	off_t blocks;
+	int sequential;
+	int mindelay;
+	int maxdelay;
+} t[MAXPROC];
+
+int
+rnd(int mi, int ma)
+{
+        return (arc4random()  % (ma - mi + 1) + mi);
+}
+
+void
+test(int indx, int num)
+{
+	ssize_t i, r;
+	time_t start;
+	int fd, n;
+	char *buf, file[80];
+
+	atomic_add_int(&share[SYNC], 1);
+	while (share[SYNC] != (unsigned int)parallel)
+		;
+
+	if ((buf = malloc(t[indx].blocksize)) == NULL)
+		err(1, "malloc");
+	snprintf(file, sizeof(file), "file.%06d.%06d", indx, num);
+	n = 0;
+	start = time(NULL);
+	while (share[DONE] != (unsigned int)parallel) {
+		setproctitle("test(%d) num %d, n %d", indx, num, n);
+		if ((fd = open(file, O_RDWR | O_CREAT | O_TRUNC, DEFFILEMODE))
+		    == -1)
+			err(1, "open(%s)", file);
+
+		for (i = 0; i < t[indx].blocks; i++) {
+			if (t[indx].sequential == 0)
+				if (lseek(fd, 2LL << (arc4random() % 18),
+				    SEEK_SET) == -1)
+					err(1, "lseek");
+			if ((r = write(fd, buf, t[indx].blocksize)) !=
+			    t[indx].blocksize) {
+				warn("write returned %zd\n", r);
+				goto done;
+			}
+			usleep(rnd(t[indx].mindelay, t[indx].maxdelay));
+		}
+
+		close(fd);
+		if (n++ == 0)
+			atomic_add_int(&share[DONE], 1);
+		if (time(NULL) - start >= RUNTIME / 4) {
+#if defined(DEBUG)
+			fprintf(stderr, "test(%d), %d Timed out\n", indx, num);
+#endif
+			break;
+		}
+	}
+done:
+	if (n++ == 0)
+		atomic_add_int(&share[DONE], 1);
+
+	_exit(0);
+}
+
+void
+setup(void)
+{
+	int i;
+
+	parallel = arc4random() % MAXPROC + 1;
+	for (i = 0; i < parallel; i++) {
+		if (arc4random() % 100 < 10)
+			t[i].blocksize = (arc4random() + 1) % MAXBLK;
+		else
+			t[i].blocksize = 2 << (arc4random() % 20);
+		t[i].sequential = arc4random() % 2;
+		t[i].mindelay = arc4random() % 50;
+		t[i].maxdelay = t[i].mindelay + arc4random() % 100;
+		t[i].blocks = 2LL << (arc4random() % 18);
+		if (t[i].blocks * t[i].blocksize > MAXSIZ)
+			t[i].blocks = MAXSIZ / t[i].blocksize;
+#if defined(DEBUG)
+		fprintf(stderr, "%3d: blocksize %7lld, sequential %d, "
+		    "mindelay %3d, maxdelay %3d, blocks %6lld, size %4lld MB\n",
+		    i, (long long)t[i].blocksize, t[i].sequential, t[i].mindelay,
+		    t[i].maxdelay, (long long)t[i].blocks,
+		    (long long)t[i].blocksize * t[i].blocks / 1024 / 1024);
+#endif
+	}
+}
+
+int
+main(void)
+{
+	size_t len;
+	time_t start;
+	int e, i, n, *pids, status;
+
+	e = 0;
+	len = PAGE_SIZE;
+	if ((share = mmap(NULL, len, PROT_READ | PROT_WRITE,
+	    MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
+		err(1, "mmap");
+
+	n = 0;
+	start = time(NULL);
+	while ((time(NULL) - start) < RUNTIME && e == 0) {
+		setup();
+
+		pids = malloc(sizeof(pid_t) * parallel);
+		share[SYNC] = share[DONE] = 0;
+		for (i = 0; i < parallel; i++) {
+			if ((pids[i] = fork()) == 0)
+				test(i, n);
+		}
+		for (i = 0; i < parallel; i++) {
+			if (waitpid(pids[i], &status, 0) != pids[i])
+				err(1, "waitpid %d", pids[i]);
+			e += status == 0 ? 0 : 1;
+		}
+		n++;
+		n = n % 10;
+		free(pids);
+	}
+
+	return (e);
+}