OpenZFS 7431 - ZFS Channel Programs

Authored by: Chris Williamson <[email protected]>
Reviewed by: Matthew Ahrens <[email protected]>
Reviewed by: George Wilson <[email protected]>
Reviewed by: John Kennedy <[email protected]>
Reviewed by: Dan Kimmel <[email protected]>
Approved by: Garrett D'Amore <[email protected]>
Ported-by: Don Brady <[email protected]>
Ported-by: John Kennedy <[email protected]>

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

3 files changed, 8 insertions, 3 deletions

diff --git a/scripts/Makefile.am b/scripts/Makefile.am
index 7b2374a82..65d7d6662 100644
--- a/scripts/Makefile.am
+++ b/scripts/Makefile.am
@@ -42,6 +42,7 @@ export KMOD_ZAVL=@abs_top_builddir@/module/avl/zavl.ko
 export KMOD_ZNVPAIR=@abs_top_builddir@/module/nvpair/znvpair.ko
 export KMOD_ZUNICODE=@abs_top_builddir@/module/unicode/zunicode.ko
 export KMOD_ZCOMMON=@abs_top_builddir@/module/zcommon/zcommon.ko
+export KMOD_ZLUA=@abs_top_builddir@/module/lua/zlua.ko
 export KMOD_ICP=@abs_top_builddir@/module/icp/icp.ko
 export KMOD_ZFS=@abs_top_builddir@/module/zfs/zfs.ko
 endef
diff --git a/scripts/dkms.mkconf b/scripts/dkms.mkconf
index ab171a606..35da3b69c 100755
--- a/scripts/dkms.mkconf
+++ b/scripts/dkms.mkconf
@@ -91,4 +91,7 @@ DEST_MODULE_LOCATION[4]="/extra/zfs/zfs"
 BUILT_MODULE_NAME[5]="icp"
 BUILT_MODULE_LOCATION[5]="module/icp/"
 DEST_MODULE_LOCATION[5]="/extra/icp/icp"
+BUILT_MODULE_NAME[6]="zlua"
+BUILT_MODULE_LOCATION[6]="module/lua/"
+DEST_MODULE_LOCATION[6]="/extra/lua/zlua"
 EOF
diff --git a/scripts/zfs.sh b/scripts/zfs.sh
index 3cfb0c1f1..185eb5279 100755
--- a/scripts/zfs.sh
+++ b/scripts/zfs.sh
@@ -26,6 +26,7 @@ KMOD_ZAVL=${KMOD_ZAVL:-zavl}
 KMOD_ZNVPAIR=${KMOD_ZNVPAIR:-znvpair}
 KMOD_ZUNICODE=${KMOD_ZUNICODE:-zunicode}
 KMOD_ZCOMMON=${KMOD_ZCOMMON:-zcommon}
+KMOD_ZLUA=${KMOD_ZLUA:-zlua}
 KMOD_ICP=${KMOD_ICP:-icp}
 KMOD_ZFS=${KMOD_ZFS:-zfs}
 
@@ -76,7 +77,7 @@ check_modules() {
 	MISSING_MODULES=""
 
 	for KMOD in $KMOD_SPL $KMOD_SPLAT $KMOD_ZAVL $KMOD_ZNVPAIR \
-	    $KMOD_ZUNICODE $KMOD_ZCOMMON $KMOD_ICP $KMOD_ZFS; do
+	    $KMOD_ZUNICODE $KMOD_ZCOMMON $KMOD_ZLUA $KMOD_ICP $KMOD_ZFS; do
 		NAME=$(basename "$KMOD" .ko)
 
 		if lsmod | grep -E -q "^${NAME}"; then
@@ -135,7 +136,7 @@ load_modules() {
 	fi
 
 	for KMOD in $KMOD_SPL $KMOD_SPLAT $KMOD_ZAVL $KMOD_ZNVPAIR \
-	    $KMOD_ZUNICODE $KMOD_ZCOMMON $KMOD_ICP $KMOD_ZFS; do
+	    $KMOD_ZUNICODE $KMOD_ZCOMMON $KMOD_ZLUA $KMOD_ICP $KMOD_ZFS; do
 		load_module "$KMOD" || return 1
 	done
 
@@ -163,7 +164,7 @@ unload_module() {
 }
 
 unload_modules() {
-	for KMOD in $KMOD_ZFS $KMOD_ICP $KMOD_ZCOMMON $KMOD_ZUNICODE \
+	for KMOD in $KMOD_ZFS $KMOD_ICP $KMOD_ZLUA $KMOD_ZCOMMON $KMOD_ZUNICODE \
 	    $KMOD_ZNVPAIR  $KMOD_ZAVL $KMOD_SPLAT $KMOD_SPL; do
 		NAME=$(basename "$KMOD" .ko)
 		USE_COUNT=$(lsmod | grep -E "^${NAME} " | awk '{print $3}')