Update zfs.sh work on FreeBSD

Extend the zfs.sh script to load and unload zfs kmods on FreeBSD.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Kjeld Schouten <kjeld@schouten-lebbing.nl>
Signed-off-by: Ryan Moeller <ryan@ixsystems.com>
Closes #9746

scripts/Makefile.am

@@ -51,6 +51,7 @@ 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
+export KMOD_FREEBSD=@abs_top_builddir@/module/openzfs.ko
 endef
 
 export EXTRA_ENVIRONMENT

scripts/zfs.sh

@@ -29,6 +29,7 @@ KMOD_ZCOMMON=${KMOD_ZCOMMON:-zcommon}
 KMOD_ZLUA=${KMOD_ZLUA:-zlua}
 KMOD_ICP=${KMOD_ICP:-icp}
 KMOD_ZFS=${KMOD_ZFS:-zfs}
+KMOD_FREEBSD=${KMOD_FREEBSD:-openzfs}
 
 
 usage() {
@@ -76,7 +77,7 @@ kill_zed() {
 	fi
 }
 
-check_modules() {
+check_modules_linux() {
 	LOADED_MODULES=""
 	MISSING_MODULES=""
 
@@ -108,7 +109,7 @@ check_modules() {
 	return 0
 }
 
-load_module() {
+load_module_linux() {
 	KMOD=$1
 
 	FILE=$(modinfo "$KMOD" | awk '/^filename:/ {print $2}')
@@ -128,7 +129,17 @@ load_module() {
 	return 0
 }
 
-load_modules() {
+load_modules_freebsd() {
+	kldload "$KMOD_FREEBSD" || return 1
+
+	if [ "$VERBOSE" = "yes" ]; then
+		echo "Successfully loaded ZFS module stack"
+	fi
+
+	return 0
+}
+
+load_modules_linux() {
 	mkdir -p /etc/zfs
 
 	if modinfo "$KMOD_ZLIB_DEFLATE" >/dev/null 2>&1; then
@@ -141,7 +152,7 @@ load_modules() {
 
 	for KMOD in $KMOD_SPL $KMOD_ZAVL $KMOD_ZNVPAIR \
 	    $KMOD_ZUNICODE $KMOD_ZCOMMON $KMOD_ZLUA $KMOD_ICP $KMOD_ZFS; do
-		load_module "$KMOD" || return 1
+		load_module_linux "$KMOD" || return 1
 	done
 
 	if [ "$VERBOSE" = "yes" ]; then
@@ -151,7 +162,7 @@ load_modules() {
 	return 0
 }
 
-unload_module() {
+unload_module_linux() {
 	KMOD=$1
 
 	NAME=$(basename "$KMOD" .ko)
@@ -167,14 +178,24 @@ unload_module() {
 	return 0
 }
 
-unload_modules() {
+unload_modules_freebsd() {
+	kldunload "$KMOD_FREEBSD" || echo "Failed to unload $KMOD_FREEBSD"
+
+	if [ "$VERBOSE" = "yes" ]; then
+		echo "Successfully unloaded ZFS module stack"
+	fi
+
+	return 0
+}
+
+unload_modules_linux() {
 	for KMOD in $KMOD_ZFS $KMOD_ICP $KMOD_ZLUA $KMOD_ZCOMMON $KMOD_ZUNICODE \
 	    $KMOD_ZNVPAIR  $KMOD_ZAVL $KMOD_SPL; do
 		NAME=$(basename "$KMOD" .ko)
 		USE_COUNT=$(lsmod | grep -E "^${NAME} " | awk '{print $3}')
 
 		if [ "$USE_COUNT" = "0" ] ; then
-			unload_module "$KMOD" || return 1
+			unload_module_linux "$KMOD" || return 1
 		fi
 	done
 
@@ -193,7 +214,7 @@ unload_modules() {
 	return 0
 }
 
-stack_clear() {
+stack_clear_linux() {
 	STACK_MAX_SIZE=/sys/kernel/debug/tracing/stack_max_size
 	STACK_TRACER_ENABLED=/proc/sys/kernel/stack_tracer_enabled
 
@@ -203,7 +224,7 @@ stack_clear() {
 	fi
 }
 
-stack_check() {
+stack_check_linux() {
 	STACK_MAX_SIZE=/sys/kernel/debug/tracing/stack_max_size
 	STACK_TRACE=/sys/kernel/debug/tracing/stack_trace
 	STACK_LIMIT=15362
@@ -224,17 +245,33 @@ if [ "$(id -u)" != 0 ]; then
 	exit 1
 fi
 
+UNAME=$(uname -s)
+
 if [ "$UNLOAD" = "yes" ]; then
 	kill_zed
 	umount -t zfs -a
-	stack_check
-	unload_modules
+	case $UNAME in
+		FreeBSD)
+	           unload_modules_freebsd
+		   ;;
+		Linux)
+	           stack_check_linux
+	           unload_modules_linux
+		   ;;
+	esac
 else
-	stack_clear
-	check_modules
-	load_modules "$@"
-	udevadm trigger
-	udevadm settle
+	case $UNAME in
+		FreeBSD)
+		   load_modules_freebsd
+		   ;;
+		Linux)
+		   stack_clear_linux
+		   check_modules_linux
+		   load_modules_linux "$@"
+		   udevadm trigger
+		   udevadm settle
+		   ;;
+	esac
 fi
 
 exit 0