System: add ZFS compilation support

tools/json/config.system.json

@@ -332,6 +332,26 @@
                     "status": "Stable",
                     "author": "@viraniac @igorpecovnik",
                     "condition": "[ -d /boot/dtb/ ] && [ -f /boot/armbianEnv.txt ]"
+                },
+                {
+                    "id": "SY018",
+                    "description": "ZFS filesystem - enable support",
+                    "command": [
+                        "module_zfs install"
+                    ],
+                    "status": "Stable",
+                    "author": "@armbian",
+                    "condition": "! module_zfs status && linux-version compare ${KERNELID} le $(module_zfs kernel_max)"
+                },
+                {
+                    "id": "SY019",
+                    "description": "ZFS filesystem - remove support",
+                    "command": [
+                        "module_zfs remove"
+                    ],
+                    "status": "Stable",
+                    "author": "@armbian",
+                    "condition": "module_zfs status"
                 }
             ]
         }

tools/modules/system/install_zfs.sh

@@ -0,0 +1,59 @@
+module_options+=(
+	["module_zfs,author"]="@armbian"
+	["module_zfs,feature"]="module_zfs"
+	["module_zfs,desc"]="Install zfs filesystem support"
+	["module_zfs,example"]="install remove status kernel_max zfs_version help"
+	["module_zfs,port"]=""
+	["module_zfs,status"]="Active"
+	["module_zfs,arch"]=""
+)
+#
+# Mmodule_zfs
+#
+function module_zfs () {
+	local title="zfs"
+	local condition=$(which "$title" 2>/dev/null)
+
+	local commands
+	IFS=' ' read -r -a commands <<< "${module_options["module_zfs,example"]}"
+
+	# determine if our kernel is not too recent
+	local zfs_dkms=$(LC_ALL=C apt-cache policy zfs-dkms | grep Candidate | xargs | cut -d" " -f2 | cut -c-5)
+	local kernel_max=$(wget -qO- https://github.com/openzfs/zfs/raw/refs/tags/zfs-${zfs_dkms}/META | grep Maximum | cut -d" " -f2)
+
+	case "$1" in
+		"${commands[0]}")
+			module_headers install
+			apt_install_wrapper apt-get -y install zfsutils-linux zfs-dkms || exit 1
+		;;
+		"${commands[1]}")
+			module_headers remove
+			apt_install_wrapper apt-get -y autopurge zfsutils-linux zfs-dkms || exit 1
+		;;
+		"${commands[2]}")
+			if check_if_installed zfsutils-linux; then
+				return 0
+			else
+				return 1
+			fi
+		;;
+		"${commands[3]}")
+			echo "${kernel_max}"
+		;;
+		"${commands[4]}")
+			echo "v${zfs_dkms}"
+		;;
+		"${commands[5]}")
+			echo -e "\nUsage: ${module_options["module_zfs,feature"]} <command>"
+			echo -e "Commands:  ${module_options["module_zfs,example"]}"
+			echo "Available commands:"
+			echo -e "\tinstall\t- Install $title."
+			echo -e "\tstatus\t- Installation status $title."
+			echo -e "\tremove\t- Remove $title."
+			echo
+		;;
+		*)
+		${module_options["module_zfs,feature"]} ${commands[3]}
+		;;
+	esac
+}