OpenZFS 7431 - ZFS Channel Programs

Authored by: Chris Williamson <chris.williamson@delphix.com>
Reviewed by: Matthew Ahrens <mahrens@delphix.com>
Reviewed by: George Wilson <george.wilson@delphix.com>
Reviewed by: John Kennedy <john.kennedy@delphix.com>
Reviewed by: Dan Kimmel <dan.kimmel@delphix.com>
Approved by: Garrett D'Amore <garrett@damore.org>
Ported-by: Don Brady <don.brady@delphix.com>
Ported-by: John Kennedy <john.kennedy@delphix.com>

OpenZFS-issue: https://www.illumos.org/issues/7431
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/dfc11533

Porting Notes:
* The CLI long option arguments for '-t' and '-m' don't parse on linux
* Switched from kmem_alloc to vmem_alloc in zcp_lua_alloc
* Lua implementation is built as its own module (zlua.ko)
* Lua headers consumed directly by zfs code moved to 'include/sys/lua/'
* There is no native setjmp/longjump available in stock Linux kernel.
  Brought over implementations from illumos and FreeBSD
* The get_temporary_prop() was adapted due to VFS platform differences
* Use of inline functions in lua parser to reduce stack usage per C call
* Skip some ZFS Test Suite ZCP tests on sparc64 to avoid stack overflow

configure.ac

@@ -131,6 +131,7 @@ AC_CONFIG_FILES([
 	module/unicode/Makefile
 	module/zcommon/Makefile
 	module/zfs/Makefile
+	module/lua/Makefile
 	module/icp/Makefile
 	include/Makefile
 	include/linux/Makefile
@@ -140,6 +141,7 @@ AC_CONFIG_FILES([
 	include/sys/fm/fs/Makefile
 	include/sys/crypto/Makefile
 	include/sys/sysevent/Makefile
+	include/sys/lua/Makefile
 	scripts/Makefile
 	tests/Makefile
 	tests/test-runner/Makefile
@@ -163,6 +165,7 @@ AC_CONFIG_FILES([
 	tests/zfs-tests/cmd/mktree/Makefile
 	tests/zfs-tests/cmd/mmap_exec/Makefile
 	tests/zfs-tests/cmd/mmapwrite/Makefile
+	tests/zfs-tests/cmd/nvlist_to_lua/Makefile
 	tests/zfs-tests/cmd/randfree_file/Makefile
 	tests/zfs-tests/cmd/readmmap/Makefile
 	tests/zfs-tests/cmd/rename_dir/Makefile
@@ -182,6 +185,9 @@ AC_CONFIG_FILES([
 	tests/zfs-tests/tests/functional/cachefile/Makefile
 	tests/zfs-tests/tests/functional/casenorm/Makefile
 	tests/zfs-tests/tests/functional/checksum/Makefile
+	tests/zfs-tests/tests/functional/channel_program/Makefile
+	tests/zfs-tests/tests/functional/channel_program/lua_core/Makefile
+	tests/zfs-tests/tests/functional/channel_program/synctask_core/Makefile
 	tests/zfs-tests/tests/functional/chattr/Makefile
 	tests/zfs-tests/tests/functional/clean_mirror/Makefile
 	tests/zfs-tests/tests/functional/cli_root/Makefile