Add FreeBSD support to OpenZFS

Add the FreeBSD platform code to the OpenZFS repository.  As of this
commit the source can be compiled and tested on FreeBSD 11 and 12.
Subsequent commits are now required to compile on FreeBSD and Linux.
Additionally, they must pass the ZFS Test Suite on FreeBSD which is
being run by the CI.  As of this commit 1230 tests pass on FreeBSD
and there are no unexpected failures.

Reviewed-by: Sean Eric Fagan <[email protected]>
Reviewed-by: Jorgen Lundman <[email protected]>
Reviewed-by: Richard Laager <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Co-authored-by: Ryan Moeller <[email protected]>
Signed-off-by: Matt Macy <[email protected]>
Signed-off-by: Ryan Moeller <[email protected]>
Closes #898 
Closes #8987 

1 files changed, 100 insertions, 0 deletions

diff --git a/include/os/freebsd/spl/sys/cmn_err.h b/include/os/freebsd/spl/sys/cmn_err.h
new file mode 100644
index 000000000..a75471f64
--- /dev/null
+++ b/include/os/freebsd/spl/sys/cmn_err.h
@@ -0,0 +1,100 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (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) 1984, 1986, 1987, 1988, 1989 AT&T	*/
+/*	  All Rights Reserved  	*/
+
+
+/*
+ * Copyright 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_CMN_ERR_H
+#define	_SYS_CMN_ERR_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#if !defined(_ASM)
+#include <sys/_stdarg.h>
+#endif
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/* Common error handling severity levels */
+
+#define	CE_CONT		0	/* continuation		*/
+#define	CE_NOTE		1	/* notice		*/
+#define	CE_WARN		2	/* warning		*/
+#define	CE_PANIC	3	/* panic		*/
+#define	CE_IGNORE	4	/* print nothing	*/
+
+#ifndef _ASM
+
+/*PRINTFLIKE2*/
+extern void cmn_err(int, const char *, ...)
+    __KPRINTFLIKE(2);
+#pragma rarely_called(cmn_err)
+
+extern void vzcmn_err(zoneid_t, int, const char *, __va_list)
+    __KVPRINTFLIKE(3);
+#pragma rarely_called(vzcmn_err)
+
+extern void vcmn_err(int, const char *, __va_list)
+    __KVPRINTFLIKE(2);
+#pragma rarely_called(vcmn_err)
+
+/*PRINTFLIKE3*/
+extern void zcmn_err(zoneid_t, int, const char *, ...)
+    __KPRINTFLIKE(3);
+#pragma rarely_called(zcmn_err)
+
+extern void vzprintf(zoneid_t, const char *, __va_list)
+    __KVPRINTFLIKE(2);
+#pragma rarely_called(vzprintf)
+
+/*PRINTFLIKE2*/
+extern void zprintf(zoneid_t, const char *, ...)
+    __KPRINTFLIKE(2);
+#pragma rarely_called(zprintf)
+
+extern void vuprintf(const char *, __va_list)
+    __KVPRINTFLIKE(1);
+#pragma rarely_called(vuprintf)
+
+/*PRINTFLIKE1*/
+extern void panic(const char *, ...)
+    __KPRINTFLIKE(1) __NORETURN;
+#pragma rarely_called(panic)
+
+extern void vpanic(const char *, __va_list)
+    __KVPRINTFLIKE(1) __NORETURN;
+#pragma rarely_called(vpanic)
+
+#endif /* !_ASM */
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_CMN_ERR_H */