libspl: move random definitions from zfs_context.h

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #17861

include/sys/zfs_context.h

@@ -126,11 +126,11 @@ extern "C" {
 #include <sys/kmem.h>
 #include <sys/zfs_delay.h>
 #include <sys/vnode.h>
-#include <sys/random.h>
 #include <sys/callb.h>
 #include <sys/trace.h>
 #include <sys/systm.h>
 #include <sys/misc.h>
+#include <sys/random.h>
 
 #include <sys/zfs_context_os.h>
 
@@ -208,31 +208,8 @@ typedef off_t loff_t;
 #define	NN_DIVISOR_1000	(1U << 0)
 #define	NN_NUMBUF_SZ	(6)
 
-extern const char *random_path;
-extern const char *urandom_path;
-
 extern int highbit64(uint64_t i);
 extern int lowbit64(uint64_t i);
-extern int random_get_bytes(uint8_t *ptr, size_t len);
-extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
-
-static __inline__ uint32_t
-random_in_range(uint32_t range)
-{
-	uint32_t r;
-
-	ASSERT(range != 0);
-
-	if (range == 1)
-		return (0);
-
-	(void) random_get_pseudo_bytes((uint8_t *)&r, sizeof (r));
-
-	return (r % range);
-}
-
-extern void random_init(void);
-extern void random_fini(void);
 
 typedef struct callb_cpr {
 	kmutex_t	*cc_lockp;

lib/libspl/include/Makefile.am

@@ -53,6 +53,7 @@ libspl_sys_HEADERS = \
 	%D%/sys/priv.h \
 	%D%/sys/processor.h \
 	%D%/sys/procfs_list.h \
+	%D%/sys/random.h \
 	%D%/sys/rwlock.h \
 	%D%/sys/simd.h \
 	%D%/sys/stack.h \

lib/libspl/include/sys/misc.h

@@ -31,6 +31,9 @@
 
 #include <sys/utsname.h>
 
+extern const char *random_path;
+extern const char *urandom_path;
+
 /*
  * Hostname information
  */

lib/libspl/include/sys/random.h

@@ -0,0 +1,50 @@
+// SPDX-License-Identifier: CDDL-1.0
+/*
+ * 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 https://opensource.org/licenses/CDDL-1.0.
+ * 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 2011 Nexenta Systems, Inc.  All rights reserved.
+ * Copyright (c) 2012, 2018 by Delphix. All rights reserved.
+ * Copyright (c) 2012, Joyent, Inc. All rights reserved.
+ */
+
+#ifndef _SYS_RANDOM_H
+#define	_SYS_RANDOM_H
+
+extern int random_get_bytes(uint8_t *ptr, size_t len);
+extern int random_get_pseudo_bytes(uint8_t *ptr, size_t len);
+
+static __inline__ uint32_t
+random_in_range(uint32_t range)
+{
+	uint32_t r;
+
+	ASSERT(range != 0);
+
+	if (range == 1)
+		return (0);
+
+	(void) random_get_pseudo_bytes((uint8_t *)&r, sizeof (r));
+
+	return (r % range);
+}
+
+#endif	/* _SYS_RANDOM_H */