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

tests/zfs-tests/include/commands.cfg

@@ -112,6 +112,7 @@ export SYSTEM_FILES='arp
     sync
     tail
     tar
+    tee
     timeout
     touch
     tr
@@ -158,6 +159,7 @@ export ZFSTEST_FILES='chg_usr_exec
     mktree
     mmap_exec
     mmapwrite
+    nvlist_to_lua
     randfree_file
     readmmap
     rename_dir

tests/zfs-tests/include/libtest.shlib

@@ -285,12 +285,12 @@ function default_container_volume_setup
 # Create a snapshot on a filesystem or volume. Defaultly create a snapshot on
 # filesystem
 #
-# $1 Existing filesystem or volume name. Default, $TESTFS
+# $1 Existing filesystem or volume name. Default, $TESTPOOL/$TESTFS
 # $2 snapshot name. Default, $TESTSNAP
 #
 function create_snapshot
 {
-	typeset fs_vol=${1:-$TESTFS}
+	typeset fs_vol=${1:-$TESTPOOL/$TESTFS}
 	typeset snap=${2:-$TESTSNAP}
 
 	[[ -z $fs_vol ]] && log_fail "Filesystem or volume's name is undefined."