Update build system and packaging

Minimal changes required to integrate the SPL sources in to the
ZFS repository build infrastructure and packaging.

Build system and packaging:
  * Renamed SPL_* autoconf m4 macros to ZFS_*.
  * Removed redundant SPL_* autoconf m4 macros.
  * Updated the RPM spec files to remove SPL package dependency.
  * The zfs package obsoletes the spl package, and the zfs-kmod
    package obsoletes the spl-kmod package.
  * The zfs-kmod-devel* packages were updated to add compatibility
    symlinks under /usr/src/spl-x.y.z until all dependent packages
    can be updated.  They will be removed in a future release.
  * Updated copy-builtin script for in-kernel builds.
  * Updated DKMS package to include the spl.ko.
  * Updated stale AUTHORS file to include all contributors.
  * Updated stale COPYRIGHT and included the SPL as an exception.
  * Renamed README.markdown to README.md
  * Renamed OPENSOLARIS.LICENSE to LICENSE.
  * Renamed DISCLAIMER to NOTICE.

Required code changes:
  * Removed redundant HAVE_SPL macro.
  * Removed _BOOT from nvpairs since it doesn't apply for Linux.
  * Initial header cleanup (removal of empty headers, refactoring).
  * Remove SPL repository clone/build from zimport.sh.
  * Use of DEFINE_RATELIMIT_STATE and DEFINE_SPINLOCK removed due
    to build issues when forcing C99 compilation.
  * Replaced legacy ACCESS_ONCE with READ_ONCE.
  * Include needed headers for `current` and `EXPORT_SYMBOL`.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Olaf Faaland <faaland1@llnl.gov>
Reviewed-by: Matthew Ahrens <mahrens@delphix.com>
Reviewed-by: Pavel Zakharov <pavel.zakharov@delphix.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
TEST_ZIMPORT_SKIP="yes"
Closes #7556

COPYRIGHT

@@ -1,39 +1,27 @@
-The majority of the code in the ZFS on Linux port comes from OpenSolaris
-which has been released under the terms of the CDDL open source license.
-This includes the core ZFS code, libavl, libnvpair, libefi, libunicode,
-and libutil.  The original OpenSolaris source can be downloaded from:
-
-http://dlc.sun.com/osol/on/downloads/b121/on-src.tar.bz2
-
-Files which do not originate from OpenSolaris are noted in the file header
-and attributed properly.  These exceptions include, but are not limited
-to, the vdev_disk.c and zvol.c implementation which are licensed under
-the CDDL.
-
-The latest stable and development versions of this port can be downloaded
-from the official ZFS on Linux site located at:
+Refer to the git commit log for authoritative copyright attribution.
 
-http://zfsonlinux.org/
+The original ZFS source code was obtained from Open Solaris which was
+released under the terms of the CDDL open source license.  Additional
+changes have been included from OpenZFS and the Illumos project which
+are similarly licensed.  These projects can be found on Github at:
 
-This ZFS on Linux port was produced at the Lawrence Livermore National
-Laboratory (LLNL) under Contract No. DE-AC52-07NA27344 (Contract 44)
-between the U.S. Department of Energy (DOE) and Lawrence Livermore
-National Security, LLC (LLNS) for the operation of LLNL.  It has been
-approved for release under LLNL-CODE-403049.
+  * https://github.com/illumos/illumos-gate
+  * https://github.com/openzfs/openzfs
 
 Unless otherwise noted, all files in this distribution are released
 under the Common Development and Distribution License (CDDL).
-Exceptions are noted within the associated source files.  A few notable
-exceptions and their respective licenses include:
 
-Skein Checksum Implementation: module/icp/algs/skein/THIRDPARTYLICENSE
-AES Implementation: module/icp/asm-x86_64/aes/THIRDPARTYLICENSE.gladman
-AES Implementation: module/icp/asm-x86_64/aes/THIRDPARTYLICENSE.openssl
-PBKDF2 Implementation: lib/libzfs/THIRDPARTYLICENSE.openssl
+Exceptions are noted within the associated source files headers and
+by including a THIRDPARTYLICENSE file with the license terms.  A few
+notable exceptions and their respective licenses include:
+
+  * Skein Checksum Implementation: module/icp/algs/skein/THIRDPARTYLICENSE
+  * AES Implementation: module/icp/asm-x86_64/aes/THIRDPARTYLICENSE.gladman
+  * AES Implementation: module/icp/asm-x86_64/aes/THIRDPARTYLICENSE.openssl
+  * PBKDF2 Implementation: lib/libzfs/THIRDPARTYLICENSE.openssl
+  * SPL Implementation: module/spl/THIRDPARTYLICENSE.gplv2
 
 This product includes software developed by the OpenSSL Project for use
 in the OpenSSL Toolkit (http://www.openssl.org/)
 
-See the file OPENSOLARIS.LICENSE for more information.
-
-Refer to the git commit log for authoritative copyright attribution.
+See the LICENSE and NOTICE for more information.

Makefile.am

@@ -11,17 +11,17 @@ endif
 if CONFIG_KERNEL
 SUBDIRS += module
 
-extradir = @prefix@/src/zfs-$(VERSION)
+extradir = $(prefix)/src/zfs-$(VERSION)
 extra_HEADERS = zfs.release.in zfs_config.h.in
 
-kerneldir = @prefix@/src/zfs-$(VERSION)/$(LINUX_VERSION)
+kerneldir = $(prefix)/src/zfs-$(VERSION)/$(LINUX_VERSION)
 nodist_kernel_HEADERS = zfs.release zfs_config.h module/$(LINUX_SYMBOLS)
 endif
 
 AUTOMAKE_OPTIONS = foreign
 EXTRA_DIST  = autogen.sh copy-builtin
 EXTRA_DIST += config/config.awk config/rpm.am config/deb.am config/tgz.am
-EXTRA_DIST += META DISCLAIMER COPYRIGHT README.markdown OPENSOLARIS.LICENSE
+EXTRA_DIST += META AUTHORS COPYRIGHT LICENSE NOTICE README.md
 
 @CODE_COVERAGE_RULES@
 
@@ -44,6 +44,22 @@ dist-hook:
 	sed -i 's/Release:[[:print:]]*/Release:      $(RELEASE)/' \
 		$(distdir)/META
 
+# For compatibility, create a matching spl-x.y.z directly which contains
+# symlinks to the updated header and object file locations.  These
+# compatibility links will be removed in the next major release.
+if CONFIG_KERNEL
+install-data-hook:
+	mkdir $(DESTDIR)$(prefix)/src/spl-$(VERSION) && \
+	cd $(DESTDIR)$(prefix)/src/spl-$(VERSION) && \
+	ln -s ../zfs-$(VERSION)/include/spl include && \
+	ln -s ../zfs-$(VERSION)/$(LINUX_VERSION) $(LINUX_VERSION) && \
+	ln -s ../zfs-$(VERSION)/zfs_config.h.in spl_config.h.in && \
+	ln -s ../zfs-$(VERSION)/zfs.release.in spl.release.in && \
+	cd $(DESTDIR)$(prefix)/src/zfs-$(VERSION)/$(LINUX_VERSION) && \
+	ln -s zfs_config.h spl_config.h && \
+	ln -s zfs.release spl.release
+endif
+
 checkstyle: cstyle shellcheck flake8 commitcheck mancheck testscheck
 
 commitcheck:

NOTICE

@@ -0,0 +1,16 @@
+This work was produced under the auspices of the U.S. Department of Energy by
+Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
+
+This work was prepared as an account of work sponsored by an agency of the
+United States Government. Neither the United States Government nor Lawrence
+Livermore National Security, LLC, nor any of their employees makes any warranty,
+expressed or implied, or assumes any legal liability or responsibility for the
+accuracy, completeness, or usefulness of any information, apparatus, product, or
+process disclosed, or represents that its use would not infringe privately owned
+rights. Reference herein to any specific commercial product, process, or service
+by trade name, trademark, manufacturer, or otherwise does not necessarily
+constitute or imply its endorsement, recommendation, or favoring by the United
+States Government or Lawrence Livermore National Security, LLC. The views and
+opinions of authors expressed herein do not necessarily state or reflect those
+of the United States Government or Lawrence Livermore National Security, LLC,
+and shall not be used for advertising or product endorsement purposes.

README.markdown → README.md

@@ -7,14 +7,22 @@ developed for Solaris and is now maintained by the OpenZFS community.
 [![coverity](https://scan.coverity.com/projects/1973/badge.svg)](https://scan.coverity.com/projects/zfsonlinux-zfs)
 
 # Official Resources
+
   * [Site](http://zfsonlinux.org)
   * [Wiki](https://github.com/zfsonlinux/zfs/wiki)
   * [Mailing lists](https://github.com/zfsonlinux/zfs/wiki/Mailing-Lists)
   * [OpenZFS site](http://open-zfs.org/)
 
 # Installation
+
 Full documentation for installing ZoL on your favorite Linux distribution can
 be found at [our site](http://zfsonlinux.org/).
 
 # Contribute & Develop
+
 We have a separate document with [contribution guidelines](./.github/CONTRIBUTING.md).
+
+# Release
+
+ZFS on Linux is released under a CDDL license.  
+For more details see the NOTICE, LICENSE and COPYRIGHT files; `UCRL-CODE-235197`

TEST

@@ -4,10 +4,6 @@
 #TEST_PREPARE_WATCHDOG="yes"
 #TEST_PREPARE_SHARES="yes"
 
-### SPLAT
-#TEST_SPLAT_SKIP="yes"
-#TEST_SPLAT_OPTIONS="-acvx"
-
 ### ztest
 #TEST_ZTEST_SKIP="yes"
 #TEST_ZTEST_TIMEOUT=1800

cmd/mount_zfs/mount_zfs.c

@@ -34,6 +34,7 @@
 #include <locale.h>
 #include <getopt.h>
 #include <fcntl.h>
+#include <errno.h>
 
 #define	ZS_COMMENT	0x00000000	/* comment */
 #define	ZS_ZFSUTIL	0x00000001	/* caller is zfs(8) */

cmd/zed/agents/zfs_diagnosis.c

@@ -26,6 +26,7 @@
  */
 
 #include <stddef.h>
+#include <string.h>
 #include <strings.h>
 #include <libuutil.h>
 #include <libzfs.h>

cmd/zed/agents/zfs_mod.c

@@ -85,6 +85,7 @@
 #include <thread_pool.h>
 #include <pthread.h>
 #include <unistd.h>
+#include <errno.h>
 #include "zfs_agents.h"
 #include "../zed_log.h"
 

cmd/zfs/zfs_iter.c

@@ -31,6 +31,7 @@
 #include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
+#include <string.h>
 #include <strings.h>
 
 #include <libzfs.h>

config/kernel-ctl-table-name.m4

@@ -2,9 +2,9 @@ dnl #
 dnl # 2.6.33 API change,
 dnl # Removed .ctl_name from struct ctl_table.
 dnl #
-AC_DEFUN([SPL_AC_CTL_NAME], [
+AC_DEFUN([ZFS_AC_KERNEL_CTL_NAME], [
 	AC_MSG_CHECKING([whether struct ctl_table has ctl_name])
-	SPL_LINUX_TRY_COMPILE([
+	ZFS_LINUX_TRY_COMPILE([
 		#include <linux/sysctl.h>
 	],[
 		struct ctl_table ctl __attribute__ ((unused));

config/kernel-fallocate-pax.m4

@@ -1,9 +1,9 @@
 dnl #
 dnl # PaX Linux 2.6.38 - 3.x API
 dnl #
-AC_DEFUN([SPL_AC_PAX_KERNEL_FILE_FALLOCATE], [
+AC_DEFUN([ZFS_AC_PAX_KERNEL_FILE_FALLOCATE], [
 	AC_MSG_CHECKING([whether fops->fallocate() exists])
-	SPL_LINUX_TRY_COMPILE([
+	ZFS_LINUX_TRY_COMPILE([
 		#include <linux/fs.h>
 	],[
 		long (*fallocate) (struct file *, int, loff_t, loff_t) = NULL;

config/kernel-group-info.m4

@@ -2,11 +2,11 @@ dnl #
 dnl # 4.9 API change
 dnl # group_info changed from 2d array via >blocks to 1d array via ->gid
 dnl #
-AC_DEFUN([SPL_AC_GROUP_INFO_GID], [
+AC_DEFUN([ZFS_AC_KERNEL_GROUP_INFO_GID], [
 	AC_MSG_CHECKING([whether group_info->gid exists])
 	tmp_flags="$EXTRA_KCFLAGS"
 	EXTRA_KCFLAGS="-Werror"
-	SPL_LINUX_TRY_COMPILE([
+	ZFS_LINUX_TRY_COMPILE([
 		#include <linux/cred.h>
 	],[
 		struct group_info *gi = groups_alloc(1);

config/kernel-inode-lock.m4

@@ -4,11 +4,11 @@ dnl # i_mutex is changed to i_rwsem. Instead of directly using
 dnl # i_mutex/i_rwsem, we should use inode_lock() and inode_lock_shared()
 dnl # We test inode_lock_shared because inode_lock is introduced earlier.
 dnl #
-AC_DEFUN([SPL_AC_INODE_LOCK], [
+AC_DEFUN([ZFS_AC_KERNEL_INODE_LOCK], [
 	AC_MSG_CHECKING([whether inode_lock_shared() exists])
 	tmp_flags="$EXTRA_KCFLAGS"
 	EXTRA_KCFLAGS="-Werror"
-	SPL_LINUX_TRY_COMPILE([
+	ZFS_LINUX_TRY_COMPILE([
 		#include <linux/fs.h>
 	],[
 		struct inode *inode = NULL;

config/kernel-kmem-cache.m4

@@ -5,9 +5,9 @@ dnl # private allocation flags which are applied when allocating a new slab
 dnl # in kmem_getpages().  Unfortunately there is no public API for setting
 dnl # non-default flags.
 dnl #
-AC_DEFUN([SPL_AC_KMEM_CACHE_ALLOCFLAGS], [
+AC_DEFUN([ZFS_AC_KERNEL_KMEM_CACHE_ALLOCFLAGS], [
 	AC_MSG_CHECKING([whether struct kmem_cache has allocflags])
-	SPL_LINUX_TRY_COMPILE([
+	ZFS_LINUX_TRY_COMPILE([
 		#include <linux/slab.h>
 	],[
 		struct kmem_cache cachep __attribute__ ((unused));
@@ -20,7 +20,7 @@ AC_DEFUN([SPL_AC_KMEM_CACHE_ALLOCFLAGS], [
 		AC_MSG_RESULT(no)
 
 		AC_MSG_CHECKING([whether struct kmem_cache has gfpflags])
-		SPL_LINUX_TRY_COMPILE([
+		ZFS_LINUX_TRY_COMPILE([
 			#include <linux/slab.h>
 		],[
 			struct kmem_cache cachep __attribute__ ((unused));
@@ -40,11 +40,11 @@ dnl # grsecurity API change,
 dnl # kmem_cache_create() with SLAB_USERCOPY flag replaced by
 dnl # kmem_cache_create_usercopy().
 dnl #
-AC_DEFUN([SPL_AC_KMEM_CACHE_CREATE_USERCOPY], [
+AC_DEFUN([ZFS_AC_KERNEL_KMEM_CACHE_CREATE_USERCOPY], [
 	AC_MSG_CHECKING([whether kmem_cache_create_usercopy() exists])
 	tmp_flags="$EXTRA_KCFLAGS"
 	EXTRA_KCFLAGS="-Werror"
-	SPL_LINUX_TRY_COMPILE([
+	ZFS_LINUX_TRY_COMPILE([
 		#include <linux/slab.h>
 		static void ctor(void *foo)
 		{

config/kernel-kuidgid.m4

@@ -3,19 +3,19 @@ dnl # User namespaces, use kuid_t in place of uid_t
 dnl # where available. Not strictly a user namespaces thing
 dnl # but it should prevent surprises
 dnl #
-AC_DEFUN([SPL_AC_KUIDGID_T], [
+AC_DEFUN([ZFS_AC_KERNEL_KUIDGID_T], [
 	AC_MSG_CHECKING([whether kuid_t/kgid_t is available])
-	SPL_LINUX_TRY_COMPILE([
+	ZFS_LINUX_TRY_COMPILE([
 		#include <linux/uidgid.h>
 	], [
-		kuid_t userid = KUIDT_INIT(0);
-		kgid_t groupid = KGIDT_INIT(0);
+		kuid_t userid __attribute__ ((unused)) = KUIDT_INIT(0);
+		kgid_t groupid __attribute__ ((unused)) = KGIDT_INIT(0);
 	],[
-		SPL_LINUX_TRY_COMPILE([
+		ZFS_LINUX_TRY_COMPILE([
 			#include <linux/uidgid.h>
 		], [
-			kuid_t userid = 0;
-			kgid_t groupid = 0;
+			kuid_t userid __attribute__ ((unused)) = 0;
+			kgid_t groupid __attribute__ ((unused)) = 0;
 		],[
 			AC_MSG_RESULT(yes; optional)
 		],[

config/kernel-pde-data.m4

@@ -2,9 +2,9 @@ dnl #
 dnl # 3.10 API change,
 dnl # PDE is replaced by PDE_DATA
 dnl #
-AC_DEFUN([SPL_AC_PDE_DATA], [
+AC_DEFUN([ZFS_AC_KERNEL_PDE_DATA], [
 	AC_MSG_CHECKING([whether PDE_DATA() is available])
-	SPL_LINUX_TRY_COMPILE_SYMBOL([
+	ZFS_LINUX_TRY_COMPILE_SYMBOL([
 		#include <linux/proc_fs.h>
 	], [
 		PDE_DATA(NULL);

config/kernel-rw.m4

@@ -3,11 +3,11 @@ dnl # 4.14 API change
 dnl # kernel_write() which was introduced in 3.9 was updated to take
 dnl # the offset as a pointer which is needed by vn_rdwr().
 dnl #
-AC_DEFUN([SPL_AC_KERNEL_WRITE], [
+AC_DEFUN([ZFS_AC_KERNEL_WRITE], [
 	AC_MSG_CHECKING([whether kernel_write() takes loff_t pointer])
 	tmp_flags="$EXTRA_KCFLAGS"
 	EXTRA_KCFLAGS="-Werror"
-	SPL_LINUX_TRY_COMPILE([
+	ZFS_LINUX_TRY_COMPILE([
 		#include <linux/fs.h>
 	],[
 		struct file *file = NULL;
@@ -32,11 +32,11 @@ dnl # 4.14 API change
 dnl # kernel_read() which has existed for forever was updated to take
 dnl # the offset as a pointer which is needed by vn_rdwr().
 dnl #
-AC_DEFUN([SPL_AC_KERNEL_READ], [
+AC_DEFUN([ZFS_AC_KERNEL_READ], [
 	AC_MSG_CHECKING([whether kernel_read() takes loff_t pointer])
 	tmp_flags="$EXTRA_KCFLAGS"
 	EXTRA_KCFLAGS="-Werror"
-	SPL_LINUX_TRY_COMPILE([
+	ZFS_LINUX_TRY_COMPILE([
 		#include <linux/fs.h>
 	],[
 		struct file *file = NULL;