all: modules
install: modules_install
distdir:

# copy makefile over to not break patches
backfs_extra := $(wildcard @LINUX@/fs/ext4/Makefile)

backfs_headers := $(wildcard @EXT_DIR@/*.h)
linux_headers := $(wildcard @LINUX@/include/linux/ext4*.h)
linux_new_headers := dynlocks.h
linux_new_headers += htree_lock.h
trace_headers := $(wildcard @LINUX@/include/trace/events/ext4*.h)

backfs_sources := $(filter-out %.mod.c,$(wildcard @EXT_DIR@/*.c))

ext3_new_sources := extents.c mballoc.c group.h dynlocks.c fiemap.h
ext3_new_headers := ext3_extents.h

ext4_new_sources := dynlocks.c fiemap.h mmp.c
ext4_new_sources += htree_lock.c
ext4_new_headers :=

new_sources := $(ext4_new_sources)
new_headers := $(ext4_new_headers)

ldiskfs_patched_sources := $(notdir $(backfs_sources) $(backfs_headers)) $(new_sources) $(new_headers)
ldiskfs_sources := $(ldiskfs_patched_sources)
ldiskfs_obj := $(filter %.o,$(ldiskfs_sources:.c=.o))

#--- autoMakefile cut-and-paste start

ldiskfs_linux_headers := $(addprefix linux/,$(subst ext4,ldiskfs,$(notdir $(linux_headers))))

$(filter %.c,$(ldiskfs_patched_sources)): sources $(ldiskfs_linux_headers) $(filter %.h,$(ldiskfs_patched_sources))

ldiskfs_sed_flags = \
	-e "s/dx_hash_info/ext4_dx_hash_info/g" \
	-e "s/DX_HASH/EXT4_DX_HASH/g" \
	-e "s/EXT4/LDISKFS/g" -e "s/ext4/ldiskfs/g"

%.c: linux-stage/fs/ext4/%.c
	sed $(strip $(ldiskfs_sed_flags)) $< > $@

%.h: linux-stage/fs/ext4/%.h
	sed $(strip $(ldiskfs_sed_flags)) $< > $@

linux/ldiskfs%.h: linux-stage/include/linux/ext4%.h
	sed $(strip $(ldiskfs_sed_flags)) $< > $@

series := @top_srcdir@/kernel_patches/series/ldiskfs-@LDISKFS_SERIES@
patches := @top_srcdir@/kernel_patches/patches

#install-data-local: sources
#	destname=@LDISKFS_META_NAME@-@LDISKFS_META_VERSION@/@LINUX_VERSION@; \
#	instdest=$(DESTDIR)/usr/src/$$destname; \
#	instfiles=$$(find . -name '*.h' | grep -v linux-stage); \
#	for instfile in $$instfiles; do \
#		if [ "$$(dirname $$instfile)" = "." ]; then \
#			/usr/bin/install -c -D $$instfile $$instdest/ldiskfs/$$instfile; \
#		else \
#			/usr/bin/install -c -D $$instfile $$instdest/$$instfile; \
#		fi \
#	done

###############################
# Kernel Build Infrastructure #
###############################

EXTRA_CFLAGS += -I@LINUX@/fs -I@LDISKFSDIR@
EXTRA_CFLAGS += -include @abs_top_builddir@/ldiskfs/ldiskfs_config.h
EXTRA_CFLAGS += -include @abs_top_builddir@/config.h

obj-m := ldiskfs.o
ldiskfs-objs := $(ldiskfs_obj)

modules: sources
	$(MAKE) -C @LINUX_OBJ@ M=$(shell pwd) $@

clean:
	$(MAKE) -C @LINUX_OBJ@ M=$(shell pwd) $@
	if [ -f Module.markers ]; then $(RM) Module.markers; fi

distclean:
	-rm -f Makefile

maintainer-clean:
	-rm -f Makefile

modules_install:
	@# Install the kernel modules
	$(MAKE) -C @LINUX_OBJ@ M=$(shell pwd) \
		INSTALL_MOD_PATH=$(DESTDIR) \
		INSTALL_MOD_DIR=updates/kernel/fs/lustre-ldiskfs $@
	@# Remove extraneous build products when packaging
	if [ -n "$(DESTDIR)" ]; then \
		find $(DESTDIR)/lib/modules/@LINUX_VERSION@ \
			-name 'modules.*' | xargs $(RM); \
	fi
	sysmap=$(DESTDIR)/boot/System.map-@LINUX_VERSION@; \
	if [ -f $$sysmap ]; then \
		depmod -ae -F $$sysmap @LINUX_VERSION@; \
	fi

################################################
# Patched ldiskfs Sources Build Infrastructure #
################################################

sources: $(backfs_sources) $(backfs_headers) $(linux_headers) $(series) $(trace_headers)
	rm -rf linux-stage linux sources trace $(ldiskfs_SOURCES)
	mkdir -p linux-stage/fs/ext4 linux-stage/include/linux \
		 linux-stage/include/trace/events
	cp $(backfs_sources) $(backfs_headers) $(backfs_extra) linux-stage/fs/ext4
	if test -n "$(linux_headers)" ; then \
		cp $(linux_headers) linux-stage/include/linux; \
	fi
	if test -n "$(trace_headers)" ; then \
		cp $(trace_headers) linux-stage/include/trace/events; \
	fi

@USE_QUILT_TRUE@	ln -s ../$(patches) linux-stage/patches
@USE_QUILT_TRUE@	ln -s ../$(series) linux-stage/series
@USE_QUILT_TRUE@	cd linux-stage && quilt push -a -q

@USE_QUILT_FALSE@	@echo -n "Applying ext4 patches:"
@USE_QUILT_FALSE@	@cd linux-stage && for i in $$(<../$(series)) ; do \
@USE_QUILT_FALSE@		echo -n " $$i" ; \
@USE_QUILT_FALSE@		patch -s -p1 < ../$(patches)/$$i || exit 1 ; \
@USE_QUILT_FALSE@	done
@USE_QUILT_FALSE@	@echo

	mkdir -p linux trace/events
	@echo -n "Replacing 'ext4' with 'ldiskfs':"
	for i in $(notdir $(backfs_headers) $(backfs_sources)) $(new_sources) ; do \
		echo -n " $$i" ; \
		sed $(strip $(ldiskfs_sed_flags)) \
			linux-stage/fs/ext4/$$i > $$i ; \
	done
	for i in $(subst ext4,,$(notdir $(backfs_headers))) ; do \
		if test -f "ext4$$i" ; then \
			echo -n " ext4$$i" ; \
			mv ext4$$i ldiskfs$$i ; \
		fi ; \
	done
	for i in $(subst ext4,,$(notdir $(linux_headers) $(new_headers))) ; do \
		echo -n " ext4$$i" ; \
		sed $(strip $(ldiskfs_sed_flags)) \
			linux-stage/include/linux/ext4$$i \
			> linux/ldiskfs$$i ; \
	done
	for i in $(subst ext4,,$(notdir $(trace_headers))) ; do \
		echo -n " ext4$$i"; \
		sed $(strip $(ldiskfs_sed_flags)) \
			linux-stage/include/trace/events/ext4$$i \
			> trace/events/ldiskfs$$i ; \
	done
	for i in $(notdir $(linux_new_headers)) ; do \
		echo -n " $$i"; \
		sed $(strip $(ldiskfs_sed_flags)) \
                linux-stage/include/linux/$$i \
                > linux/$$i ; \
	done

	@echo
	touch sources

foo-check:
	@echo "ldiskfs_sources: $(ldiskfs_sources)"
	@echo "ldiskfs_SOURCES: $(ldiskfs_SOURCES)"
	@echo "ldiskfs_headers: $(ldiskfs_headers)"
	@echo "ldiskfs_objects: $(ldiskfs_objects)"
	@echo "ldiskfs_OBJECTS: $(ldiskfs_OBJECTS)"
	@echo "ldiskfs_LDADD: $(ldiskfs_LDADD)"

MOSTLYCLEANFILES := @MOSTLYCLEANFILES@
CLEANFILES = sources $(notdir $(linux_new_headers) $(linux_headers) $(backfs_headers) $(backfs_sources) $(new_sources) $(new_headers) $(trace_headers))

#--- autoMakefile cut-and-paste end