svn commit: r355525 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Sun Dec  8 06:35:25 2019
New Revision: 355525
URL: https://svnweb.freebsd.org/changeset/base/355525

Log:
  Added a regression test.

Added:
  user/pho/stress2/misc/ufssuspend.sh   (contents, props changed)

Added: user/pho/stress2/misc/ufssuspend.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/ufssuspend.sh	Sun Dec  8 06:35:25 2019	(r355525)
@@ -0,0 +1,133 @@
+#!/bin/sh
+
+# ioctl(g_ufs_suspend_handle, UFSSUSPEND, &statfsp->f_fsid) test scenario.
+
+# Bug 230220 - UFS: the freezing ioctl (i.e.UFSSUSPEND) causes panic or EBUSY
+# "panic: devfs_set_cdevpriv failed" seen.
+# Test scenario by Dexuan Cui <decui microsoft com>
+# Fixed by r337055.
+
+# $FreeBSD$
+
+[ `id -u` -ne 0 ] && echo "Must be root!" && exit 1
+. ../default.cfg
+
+cat > /tmp/ufssuspend.c <<EOF
+
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/param.h>
+#include <sys/ucred.h>
+#include <sys/mount.h>
+
+#include <ufs/ffs/fs.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <paths.h>
+#include <poll.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sysexits.h>
+#include <syslog.h>
+#include <unistd.h>
+
+static int g_ufs_suspend_handle = -1;
+static const char *dev = "/dev";
+
+static int
+freeze(void)
+{
+	struct statfs *mntbuf, *statfsp;
+	int mntsize;
+	int error = 0;
+	int i;
+
+	g_ufs_suspend_handle = open(_PATH_UFSSUSPEND, O_RDWR);
+	if (g_ufs_suspend_handle == -1) {
+		printf("unable to open %s", _PATH_UFSSUSPEND);
+		return (errno);
+	}
+
+	mntsize = getmntinfo(&mntbuf, MNT_NOWAIT);
+	if (mntsize == 0) {
+		printf("There is no mount information\n");
+		return (EINVAL);
+	}
+
+	for (i = mntsize - 1; i >= 0; --i) {
+		statfsp = &mntbuf[i];
+
+		if (strncmp(statfsp->f_mntonname, dev, strlen(dev)) == 0)
+			continue; /* skip to freeze '/dev' */
+
+		if (statfsp->f_flags & MNT_RDONLY)
+			continue; /* skip to freeze RDONLY partition */
+
+		if (strncmp(statfsp->f_fstypename, "ufs", 3) != 0)
+			continue; /* so far, only UFS can be frozen */
+
+		printf("suspending fs: %s\n",  statfsp->f_mntonname);
+		error = ioctl(g_ufs_suspend_handle, UFSSUSPEND, &statfsp->f_fsid);
+		if (error != 0) {
+			printf("error: %d\n", errno);
+			error = errno;
+		} else {
+			printf("Successfully suspend fs: %s\n",  statfsp->f_mntonname);
+		}
+	}
+
+	return (error);
+}
+
+/**
+ * closing the opened handle will thaw the FS.
+ */
+static int
+thaw(void)
+{
+	int error = 0;
+
+	if (g_ufs_suspend_handle != -1) {
+		error = close(g_ufs_suspend_handle);
+		if (!error) {
+			g_ufs_suspend_handle = -1;
+			printf("Successfully thaw the fs\n");
+		} else {
+			error = errno;
+			printf("Fail to thaw the fs: "
+					"%d %s\n", errno, strerror(errno));
+		}
+	} else {
+		printf("The fs has already been thawed\n\n");
+	}
+
+	return (error);
+}
+
+int
+main(void)
+{
+	int error;
+
+	error = freeze();
+	printf("freeze: err=%d\n", error);
+
+	error = thaw();
+	printf("thaw: err=%d\n", error);
+
+	return 0;
+}
+EOF
+
+mycc -o /tmp/ufssuspend -Wall -Wextra -O2 -g /tmp/ufssuspend.c || exit 1
+rm /tmp/ufssuspend.c
+
+cd /tmp
+./ufssuspend > /dev/null
+s=$?
+rm /tmp/ufssuspend
+exit $s