Factor Linux specific code out of spa_misc.c

Move these Linux module parameter get/set helpers in to
platform specific code.

Reviewed-by: Igor Kozhukhov <igor@dilos.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Ryan Moeller <ryan@ixsystems.com>
Signed-off-by: Matt Macy <mmacy@FreeBSD.org>
Closes #9457

module/os/linux/zfs/Makefile.in

@@ -17,6 +17,7 @@ $(MODULE)-objs += ../os/linux/zfs/trace.o
 $(MODULE)-objs += ../os/linux/zfs/qat.o
 $(MODULE)-objs += ../os/linux/zfs/qat_compress.o
 $(MODULE)-objs += ../os/linux/zfs/qat_crypt.o
+$(MODULE)-objs += ../os/linux/zfs/spa_misc_os.o
 $(MODULE)-objs += ../os/linux/zfs/spa_stats.o
 $(MODULE)-objs += ../os/linux/zfs/vdev_disk.o
 $(MODULE)-objs += ../os/linux/zfs/vdev_file.o

module/os/linux/zfs/spa_misc_os.c

@@ -0,0 +1,105 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+/*
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011, 2019 by Delphix. All rights reserved.
+ * Copyright 2015 Nexenta Systems, Inc.  All rights reserved.
+ * Copyright (c) 2014 Spectra Logic Corporation, All rights reserved.
+ * Copyright 2013 Saso Kiselkov. All rights reserved.
+ * Copyright (c) 2017 Datto Inc.
+ * Copyright (c) 2017, Intel Corporation.
+ */
+
+#include <sys/zfs_context.h>
+#include <sys/spa_impl.h>
+#include <sys/spa.h>
+#include <sys/txg.h>
+#include <sys/unique.h>
+#include <sys/dsl_pool.h>
+#include <sys/dsl_dir.h>
+#include <sys/dsl_prop.h>
+#include <sys/fm/util.h>
+#include <sys/dsl_scan.h>
+#include <sys/fs/zfs.h>
+#include <sys/kstat.h>
+#include "zfs_prop.h"
+
+int
+param_set_deadman_ziotime(const char *val, zfs_kernel_param_t *kp)
+{
+	spa_t *spa = NULL;
+	int error;
+
+	error = param_set_ulong(val, kp);
+	if (error < 0)
+		return (SET_ERROR(error));
+
+	if (spa_mode_global != 0) {
+		mutex_enter(&spa_namespace_lock);
+		while ((spa = spa_next(spa)) != NULL)
+			spa->spa_deadman_ziotime =
+			    MSEC2NSEC(zfs_deadman_ziotime_ms);
+		mutex_exit(&spa_namespace_lock);
+	}
+
+	return (0);
+}
+
+int
+param_set_deadman_synctime(const char *val, zfs_kernel_param_t *kp)
+{
+	spa_t *spa = NULL;
+	int error;
+
+	error = param_set_ulong(val, kp);
+	if (error < 0)
+		return (SET_ERROR(error));
+
+	if (spa_mode_global != 0) {
+		mutex_enter(&spa_namespace_lock);
+		while ((spa = spa_next(spa)) != NULL)
+			spa->spa_deadman_synctime =
+			    MSEC2NSEC(zfs_deadman_synctime_ms);
+		mutex_exit(&spa_namespace_lock);
+	}
+
+	return (0);
+}
+
+int
+param_set_slop_shift(const char *buf, zfs_kernel_param_t *kp)
+{
+	unsigned long val;
+	int error;
+
+	error = kstrtoul(buf, 0, &val);
+	if (error)
+		return (SET_ERROR(error));
+
+	if (val < 1 || val > 31)
+		return (SET_ERROR(-EINVAL));
+
+	error = param_set_int(buf, kp);
+	if (error < 0)
+		return (SET_ERROR(error));
+
+	return (0);
+}