git: 55aa53fbf2bb - main - stress2: Added a zfs regression test scenario

The branch main has been updated by pho:

URL: https://cgit.FreeBSD.org/src/commit/?id=55aa53fbf2bbeb7c032eae1a3767e043390a28da

commit 55aa53fbf2bbeb7c032eae1a3767e043390a28da
Author:     Peter Holm <pho@FreeBSD.org>
AuthorDate: 2024-11-18 09:40:16 +0000
Commit:     Peter Holm <pho@FreeBSD.org>
CommitDate: 2024-11-18 09:40:16 +0000

    stress2: Added a zfs regression test scenario
---
 tools/test/stress2/misc/zfs18.sh | 134 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)

diff --git a/tools/test/stress2/misc/zfs18.sh b/tools/test/stress2/misc/zfs18.sh
new file mode 100755
index 000000000000..fb4f301f43c9
--- /dev/null
+++ b/tools/test/stress2/misc/zfs18.sh
@@ -0,0 +1,134 @@
+#!/bin/sh
+
+# File corruption scenario.
+# Test program obtained from Kyle Evans <kevans@FreeBSD.org>
+
+# "panic: VERIFY3(rc->rc_count == number) failed (4849664 == 0)" seen.
+
+# Page fault seen:
+# https://people.freebsd.org/~pho/stress/log/log0560.txt
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+[ `sysctl -n kern.kstack_pages` -lt 4 ] && exit 0
+
+. ../default.cfg
+
+prog=$(basename "$0" .sh)
+cat > /tmp/$prog.c <<EOF
+#include <sys/mman.h>
+#include <sys/stat.h>
+
+#include <assert.h>
+#include <err.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <unistd.h>
+
+//#define	FILE	"2"
+#define	FILE	"file"
+
+int
+main(void)
+{
+	struct stat sb;
+	ssize_t wsz;
+	size_t bufsz;
+	void *buf, *obuf;
+	int mfd, fd;
+	int done = 0;
+
+	mfd = open(FILE, O_RDONLY);
+	assert(mfd >= 0);
+
+	assert(fstat(mfd, &sb) == 0);
+	bufsz = sb.st_size;
+	buf = obuf = mmap(NULL, bufsz, PROT_READ, MAP_SHARED, mfd, 0);
+	assert(buf != MAP_FAILED);
+
+	/* O_RDWR */
+	fd = open(FILE, O_RDWR);
+	if (fd < 0)
+		err(1, "open");
+	assert(fd >= 0);
+
+again:
+	while (bufsz > 0) {
+		wsz = write(fd, buf, bufsz);
+		if (wsz < 0)
+			err(1, "write");
+		else if (wsz == 0)
+			fprintf(stderr, "Huh?\n");
+		bufsz -= wsz;
+		buf += wsz;
+	}
+
+	bufsz = sb.st_size;
+	buf = obuf;
+
+	if (++done < 2)
+		goto again;
+
+	close(fd);
+	munmap(obuf, sb.st_size);
+	close(mfd);
+	return (0);
+}
+EOF
+mycc -o /tmp/$prog -Wall -Wextra -O0 /tmp/$prog.c || exit 1
+set -u
+kldstat -v | grep -q zfs.ko  || { kldload zfs.ko ||
+    exit 0; loaded=1; }
+
+u1=$mdstart
+u2=$((u1 + 1))
+mp0=/stress2_tank/test		# zfs mount
+
+mdconfig -l | grep -q md$u1 && mdconfig -d -u $u1
+mdconfig -l | grep -q md$u2 && mdconfig -d -u $u2
+
+mdconfig -s 4g -u $u1
+mdconfig -s 4g -u $u2
+
+zpool list | egrep -q "^stress2_tank" && zpool destroy stress2_tank
+[ -d /stress2_tank ] && rm -rf /stress2_tank
+zpool create stress2_tank raidz md$u1 md$u2
+zfs create ${mp0#/}
+
+here=`pwd`
+cd /stress2_tank
+# Optimized file creation:
+#jot -b 'A' -s '' 875998989 > file
+dd if=/dev/random of=file bs=1m count=$(((875998990/1024/1024)+1)) status=none
+truncate -s 875998990 file
+cat file file > file.post
+mv file file.orig
+
+counter=1
+s=0
+start=`date +%s`
+while [ $((`date +%s` - start)) -lt 300 ]; do
+	cp file.orig file
+	/tmp/$prog
+	if ! cmp file file.post; then
+		echo "Iteration #$counter"
+		od -t x8 file      | head -1000 > /tmp/$prog.file1
+		od -t x8 file.post | head -1000 > /tmp/$prog.file2
+		diff /tmp/$prog.file1 /tmp/$prog.file2 | head -15
+		rm /tmp/$prog.file1 /tmp/$prog.file2
+		s=1
+		break
+	fi
+	counter=$((counter + 1))
+done
+cd $here
+
+zfs umount ${mp0#/}
+zfs destroy -r stress2_tank
+zpool destroy stress2_tank
+
+mdconfig -d -u $u2
+mdconfig -d -u $u1
+set +u
+[ $loaded ] && kldunload zfs.ko
+rm /tmp/$prog /tmp/$prog.c
+exit $s