From 888e4b1d8a9c7fa32d624774326d602deb9a754c Mon Sep 17 00:00:00 2001
From: Manuel Bentele
Date: Wed, 10 Jul 2019 22:54:27 +0200
Subject: Added Makefile to build all software modules

The modules can be built inside the 'vanilla' kernel source tree or 'out-of-tree'. Furthermore, the losetup utility can be built.
---
 Makefile | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 83 insertions(+)
 create mode 100644 Makefile

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..9ac1860
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,83 @@
+#------------------------------------------------------------------------------
+# Makefile - builds the entire project with all subprojects
+#------------------------------------------------------------------------------
+# author: Manuel Bentele
+# date  : 10.07.2019
+#------------------------------------------------------------------------------
+
+#------------------------------------------------------------------------------
+# Global configuration (file paths and config)
+#------------------------------------------------------------------------------
+KERNEL_SRC_DIR    := $(shell pwd)/implementation/loop
+KERNEL_HDR_DIR    := /lib/modules/$(shell uname -r)/build
+LOSETUP_SRC_DIR   := $(shell pwd)/implementation/losetup
+KERNEL_MOD_CONFIG := $(shell pwd)/config/kernel-qcow2_x86-64_module.config
+LOCAL_MOD_CONFIG  += CONFIG_BLK_DEV_LOOP=m
+LOCAL_MOD_CONFIG  += CONFIG_BLK_DEV_LOOP_FILE_FMT_RAW=m
+LOCAL_MOD_CONFIG  += CONFIG_BLK_DEV_LOOP_FILE_FMT_QCOW=m
+
+BUILD             ?= vanilla
+KERNEL_DIR        ?= $(KERNEL_SRC_DIR)
+CONFIG            ?= KCONFIG_CONFIG=$(KERNEL_MOD_CONFIG)
+TARGET_PATH_PREFX ?= drivers/block/loop/
+
+ifeq ($(BUILD),out-of-tree)
+PATCH              = patch
+KERNEL_DIR         = $(KERNEL_HDR_DIR)
+CONFIG             = $(LOCAL_MOD_CONFIG) M=$(KERNEL_SRC_DIR)/drivers/block/loop
+TARGET_PATH_PREFX  = 
+endif
+
+#------------------------------------------------------------------------------
+# Target definitions
+#------------------------------------------------------------------------------
+all: modules losetup
+clean: clean_modules clean_losetup
+modules: loop.ko loop_file_fmt_raw.ko loop_file_fmt_qcow.ko
+
+clean_modules:
+	$(call print_heading,"Clean all kernel modules")
+	@$(MAKE) --no-print-directory -C $(KERNEL_DIR) $(CONFIG) clean
+
+patch:
+	$(call print_heading, "Patch kernel headers")
+	@sudo cp -f $(KERNEL_SRC_DIR)/include/uapi/linux/loop.h \
+		$(KERNEL_HDR_DIR)/include/uapi/linux/loop.h
+	@sudo cp -f $(KERNEL_SRC_DIR)/drivers/block/Kconfig \
+		$(KERNEL_HDR_DIR)/drivers/block/Kconfig
+	@sudo mkdir -p $(KERNEL_HDR_DIR)/drivers/block/loop
+	@sudo cp -f $(KERNEL_SRC_DIR)/drivers/block/loop/loop_main.h \
+		$(KERNEL_HDR_DIR)/drivers/block/loop/loop_main.h
+	@sudo cp -f $(KERNEL_SRC_DIR)/drivers/block/loop/loop_file_fmt.h \
+		$(KERNEL_HDR_DIR)/drivers/block/loop/loop_file_fmt.h
+	@sudo cp -f $(KERNEL_SRC_DIR)/drivers/block/loop/Kconfig \
+		$(KERNEL_HDR_DIR)/drivers/block/loop/Kconfig
+
+loop.ko:
+loop_file_fmt_raw.ko:
+loop_file_fmt_qcow.ko:
+
+%.ko: $(PATCH)
+	$(call print_heading,"Build $@ kernel module")
+	@$(MAKE) --no-print-directory -C $(KERNEL_DIR) $(CONFIG) \
+		$(TARGET_PATH_PREFX)$@
+
+losetup:
+	$(call print_heading,"Build $@ utility")
+	@cd $(LOSETUP_SRC_DIR) && \
+		./tools/config-gen all && \
+		$(MAKE) --no-print-directory losetup
+
+clean_losetup:
+	$(call print_heading,"Clean $@ utility")
+	@cd $(LOSETUP_SRC_DIR) && \
+		$(MAKE) --no-print-directory clean
+
+#------------------------------------------------------------------------------
+# Function definitions
+#------------------------------------------------------------------------------
+define print_heading
+	@echo "#--------------------------------------------------------------"
+	@echo "# [BUILD: $(BUILD)] $(1)"
+	@echo "#--------------------------------------------------------------"
+endef
-- 
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