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EXTRA_DIST = kernel_patches

if MODULES
if LDISKFS_ENABLED
all-local: sources



ldiskfs.ko: sources
endif
endif

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

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

# Convert LDISKFS_SUPER_MAGIC back to EXT4_SUPER_MAGIC so that the ldiskfs
# code can use the existing kernel headers instead of defining this itself.
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" \
	-e "s/LDISKFS_SUPER_MAGIC/EXT4_SUPER_MAGIC/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
	@echo sed $(strip $(ldiskfs_sed_flags)) $< '=>' $@
	sed $(strip $(ldiskfs_sed_flags)) $< > $@

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

series := @top_srcdir@/ldiskfs/kernel_patches/series/ldiskfs-$(LDISKFS_SERIES)
patches := @top_srcdir@/ldiskfs/kernel_patches/patches

sources: $(backfs_sources) $(backfs_headers) $(linux_headers) $(uapi_linux_headers) $(series) $(trace_headers)
	rm -rf linux-stage uapi linux sources trace $(ldiskfs_SOURCES)
	mkdir -p linux-stage/fs/ext4 linux-stage/include/linux \
		 linux-stage/include/uapi/linux \
		 linux-stage/include/trace/events
	cp $(backfs_sources) $(backfs_headers) $(backfs_extra) linux-stage/fs/ext4
	if test -n "$(linux_headers)" ; then \
		cp $(linux_headers) linux-stage/include/linux; \
	fi
	if test -n "$(uapi_linux_headers)" ; then \
		cp $(uapi_linux_headers) linux-stage/include/uapi/linux; \
	fi
	if test -n "$(trace_headers)" ; then \
		cp $(trace_headers) linux-stage/include/trace/events; \
	fi
if USE_QUILT
	ln -s ../$(patches) linux-stage/patches
	ln -s ../$(series) linux-stage/series
	cd linux-stage && quilt push -a -q
else
	@echo -n "Applying ext4 patches:"
	@cd linux-stage && for i in $$(<../$(series)) ; do \
		echo -n " $$i" ; \
		patch -s -p1 < ../$(patches)/$$i || exit 1 ; \
	done
	@echo
endif
	mkdir -p uapi/linux linux trace/events
	@echo -n "Replacing 'ext4' with 'ldiskfs':"
	for i in $(notdir $(backfs_headers) $(backfs_sources)) $(new_sources) ; do \
		[ -f linux-stage/fs/ext4/$$i ] || continue; \
		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$$i ; \
		fi ; \
	done
	for i in $(subst ext4,,$(notdir $(uapi_linux_headers))) ; do \
		echo -n " ext4$$i" ; \
		sed $(strip $(ldiskfs_sed_flags)) \
			linux-stage/include/uapi/linux/ext4$$i \
			> uapi/linux/ldiskfs$$i ; \
	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)"


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

clean-local:
	rm -rf linux linux-stage ldiskfs*.h trace modules.order