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fs/f2fs: add support for creating a f2fs image

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This patch makes possible to create rootfs image using f2fs
filesystem.

Signed-off-by: Grzegorz Blach <grzegorz@blach.pl>
[Thomas:
 - keep only the minimal functionality, as suggested by Yann E. Morin
 - use truncate -s instead of dd to create the initial empty image
   file, as suggested by Yann E. Morin]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
This commit is contained in:
Grzegorz Blach 2018-10-26 22:00:16 +02:00 committed by Thomas Petazzoni
parent a879a6bc28
commit 6f727ce1fe
3 changed files with 52 additions and 0 deletions
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1
fs/Config.in
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@ -6,6 +6,7 @@ source "fs/cloop/Config.in"
source "fs/cpio/Config.in"
source "fs/cramfs/Config.in"
source "fs/ext2/Config.in"
source "fs/f2fs/Config.in"
source "fs/initramfs/Config.in"
source "fs/iso9660/Config.in"
source "fs/jffs2/Config.in"

21
fs/f2fs/Config.in Normal file
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@ -0,0 +1,21 @@
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.
endif # BR2_TARGET_ROOTFS_F2FS

30
fs/f2fs/f2fs.mk Normal file
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@ -0,0 +1,30 @@
################################################################################
#
# 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_OPTS = \
-f \
-l "$(F2FS_LABEL)"
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))