Merge from bittboy/buildroot@db180c0

fs/f2fs/Config.in

@@ -0,0 +1,59 @@
+config BR2_TARGET_ROOTFS_F2FS
+	bool "f2fs root filesystem"
+	select BR2_PACKAGE_HOST_F2FS_TOOLS
+	help
+	  Build a f2fs root filesystem. If you enable this option, you
+	  probably want to enable the f2fs-tools package too.
+
+if BR2_TARGET_ROOTFS_F2FS
+
+config BR2_TARGET_ROOTFS_F2FS_LABEL
+	string "filesystem label"
+
+config BR2_TARGET_ROOTFS_F2FS_SIZE
+	string "filesystem size"
+	default "100M"
+	help
+	  The size of the filesystem image in bytes.
+	  Suffix with K, M, G or T for power-of-two kilo-, mega-, giga-
+	  or terabytes.
+
+config BR2_TARGET_ROOTFS_F2FS_COLD_FILES
+	string "extension list for cold files"
+	help
+	  Specify a comma separated file extension list in order f2fs
+	  to treat them as cold files. The default list includes most
+	  of multimedia file extensions such as jpg, gif, mpeg, mkv,
+	  and so on.
+
+config BR2_TARGET_ROOTFS_F2FS_HOT_FILES
+	string "extension list for hot files"
+	help
+	  Specify a comma separated file extension list in order f2fs
+	  to treat them as hot files. The default list includes only
+	  a db extension.
+
+config BR2_TARGET_ROOTFS_F2FS_OVERPROVISION
+	int "overprovision ratio"
+	default 0
+	help
+	  The percentage over the volume size for overprovision
+	  area. This area is hidden to users, and utilized by F2FS
+	  cleaner.
+
+	  Leave at 0 for autocalculation according to the partition
+	  size.
+
+config BR2_TARGET_ROOTFS_F2FS_DISCARD
+	bool "discard policy"
+	default y
+	help
+	  Enable or disable discard policy.
+
+config BR2_TARGET_ROOTFS_F2FS_FEATURES
+	string "filesystem features"
+	help
+	  List of features that the F2FS filesystem should support
+	  (e.g "encrypt")
+
+endif # BR2_TARGET_ROOTFS_F2FS

fs/f2fs/f2fs.mk

@@ -0,0 +1,45 @@
+################################################################################
+#
+# Build the f2fs root filesystem image
+#
+################################################################################
+
+F2FS_SIZE = $(call qstrip,$(BR2_TARGET_ROOTFS_F2FS_SIZE))
+ifeq ($(BR2_TARGET_ROOTFS_F2FS)-$(F2FS_SIZE),y-)
+$(error BR2_TARGET_ROOTFS_F2FS_SIZE cannot be empty)
+endif
+
+# qstrip results in stripping consecutive spaces into a single one. So the
+# variable is not qstrip-ed to preserve the integrity of the string value.
+F2FS_LABEL := $(subst ",,$(BR2_TARGET_ROOTFS_F2FS_LABEL))
+# ")
+F2FS_COLD_FILES = $(call qstrip,$(BR2_TARGET_ROOTFS_F2FS_COLD_FILES))
+F2FS_HOT_FILES = $(call qstrip,$(BR2_TARGET_ROOTFS_F2FS_HOT_FILES))
+
+ifeq ($(BR2_TARGET_ROOTFS_F2FS_DISCARD),y)
+F2FS_DISCARD = 1
+else
+F2FS_DISCARD = 0
+endif
+
+F2FS_FEATURES = $(call qstrip,$(BR2_TARGET_ROOTFS_F2FS_FEATURES))
+
+F2FS_OPTS = \
+	-f \
+	-l "$(F2FS_LABEL)" \
+	-t $(F2FS_DISCARD) \
+	-o $(BR2_TARGET_ROOTFS_F2FS_OVERPROVISION) \
+	$(if $(F2FS_COLD_FILES),-e "$(F2FS_COLD_FILES)") \
+	$(if $(F2FS_HOT_FILES),-E "$(F2FS_HOT_FILES)") \
+	$(if $(F2FS_FEATURES),-O "$(F2FS_FEATURES)")
+
+ROOTFS_F2FS_DEPENDENCIES = host-f2fs-tools
+
+define ROOTFS_F2FS_CMD
+	$(RM) -f $@
+	truncate -s $(F2FS_SIZE) $@
+	$(HOST_DIR)/sbin/mkfs.f2fs $(F2FS_OPTS) $@
+	$(HOST_DIR)/sbin/sload.f2fs -f $(TARGET_DIR) $@
+endef
+
+$(eval $(rootfs))