libspl: move SID definitions from zfs_context.h; remove kernel gate

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

@@ -238,16 +238,6 @@ extern int zfs_secpolicy_destroy_perms(const char *name, cred_t *cr);
 extern int secpolicy_zfs(const cred_t *cr);
 extern zoneid_t getzoneid(void);
 
-/* SID stuff */
-typedef struct ksiddomain {
-	uint_t	kd_ref;
-	uint_t	kd_len;
-	char	*kd_name;
-} ksiddomain_t;
-
-ksiddomain_t *ksid_lookupdomain(const char *);
-void ksiddomain_rele(ksiddomain_t *);
-
 #define	DDI_SLEEP	KM_SLEEP
 #define	ddi_log_sysevent(_a, _b, _c, _d, _e, _f, _g) \
 	sysevent_post_event(_c, _d, _b, "libzpool", _e, _f)

lib/libspl/include/Makefile.am

@@ -55,6 +55,7 @@ libspl_sys_HEADERS = \
 	%D%/sys/procfs_list.h \
 	%D%/sys/random.h \
 	%D%/sys/rwlock.h \
+	%D%/sys/sid.h \
 	%D%/sys/simd.h \
 	%D%/sys/stack.h \
 	%D%/sys/stdtypes.h \

lib/libspl/include/sys/sid.h

@@ -0,0 +1,44 @@
+// 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_SID_H
+#define	_SYS_SID_H
+
+#include <sys/types.h>
+
+/* SID stuff */
+typedef struct ksiddomain {
+	uint_t	kd_ref;
+	uint_t	kd_len;
+	char	*kd_name;
+} ksiddomain_t;
+
+ksiddomain_t *ksid_lookupdomain(const char *);
+void ksiddomain_rele(ksiddomain_t *);
+
+#endif

lib/libzpool/kernel.c

@@ -40,6 +40,7 @@
 #include <sys/rrwlock.h>
 #include <sys/spa.h>
 #include <sys/spa_impl.h>
+#include <sys/sid.h>
 #include <sys/stat.h>
 #include <sys/systeminfo.h>
 #include <sys/time.h>

module/zfs/zfs_fuid.c

@@ -28,8 +28,8 @@
 #include <sys/avl.h>
 #include <sys/zap.h>
 #include <sys/nvpair.h>
-#ifdef _KERNEL
 #include <sys/sid.h>
+#ifdef _KERNEL
 #include <sys/zfs_vfsops.h>
 #include <sys/zfs_znode.h>
 #endif