[Buildroot] [PATCH] Ubinize: made UBI volume name and volume alignment configurable
Roland Uuesoo
rolandu at gmail.com
Tue Mar 6 10:47:59 UTC 2012
From: Roland Uuesoo <roland at martem.eu>
Signed-off-by: Roland Uuesoo <roland at martem.eu>
---
fs/ubifs/Config.in | 39 +++++++++++++++++++++++++++++++++++----
fs/ubifs/ubi.mk | 12 ++++++++----
fs/ubifs/ubinize.cfg | 2 --
3 files changed, 43 insertions(+), 10 deletions(-)
diff --git a/fs/ubifs/Config.in b/fs/ubifs/Config.in
index a5ef5f2..f887848 100644
--- a/fs/ubifs/Config.in
+++ b/fs/ubifs/Config.in
@@ -7,20 +7,37 @@ config BR2_TARGET_ROOTFS_UBIFS_LEBSIZE
hex "UBI logical erase block size"
depends on BR2_TARGET_ROOTFS_UBIFS
default 0x1f800
+ help
+ In general, logical eraseblock size is a property of the UBI device,
+ not of the UBI volume. The logical eraseblock size depends on the
+ physical eraseblock size and on how much bytes UBI headers consume.
+ But because of the volume alignment, the usable size of logical
+ eraseblock in a volume may be less.
+ LEB size = PEB size - (PEB size % alignment)
config BR2_TARGET_ROOTFS_UBIFS_MINIOSIZE
hex "UBI minimum I/O size"
depends on BR2_TARGET_ROOTFS_UBIFS
default 0x800
help
- Some comment required here
+ Minimum input/output unit size. All the I/O may only be done
+ in fractions of the contained number.
config BR2_TARGET_ROOTFS_UBIFS_MAXLEBCNT
int "Maximum LEB count"
depends on BR2_TARGET_ROOTFS_UBIFS
default 2048
help
- Some comment required here
+ This option defines the maximum file-system size (maximum UBI volume
+ size). For example, if you use --max-leb-cnt=200, than it will be
+ possible to put the resulting image to smaller UBI volume and mount
+ it. But if the image is put to a larger UBI volume, the file-system
+ will anyway take only first 200 LEBs, and the rest of the volume will
+ be wasted.
+ Note, the --max-leb-cnt option does not affect the size of the
+ resulting image file, which depends only on the amount of data in the
+ file-system. mkfs.ubifs just writes the --max-leb-cnt value to the
+ file-system superblocks.
choice
prompt "ubifs runtime compression"
@@ -52,8 +69,7 @@ choice
default BR2_TARGET_ROOTFS_UBIFS_NONE
depends on BR2_TARGET_ROOTFS_UBIFS
help
- Select which compression format to compress the final image
- into.
+ Select which compression format to compress the final image into.
config BR2_TARGET_ROOTFS_UBIFS_NONE
bool "no compression"
@@ -98,3 +114,18 @@ config BR2_TARGET_ROOTFS_UBI_SUBSIZE
help
Tells ubinize that the flash supports sub-pages and the sub-page
size. Use 0 if subpages are not supported on flash chip.
+
+config BR2_TARGET_ROOTFS_UBI_VOL_ALIGNMENT
+ int "UBI volume alignment"
+ depends on BR2_TARGET_ROOTFS_UBI
+ default 1
+ help
+ Alignment is a multiple of the minimal flash input/output unit size.
+ Volume alignment must not be greater than LEB size.
+
+config BR2_TARGET_ROOTFS_UBI_VOL_NAME
+ string "UBI volume name"
+ depends on BR2_TARGET_ROOTFS_UBI
+ default rootfs
+ help
+ UBI volume name
diff --git a/fs/ubifs/ubi.mk b/fs/ubifs/ubi.mk
index c88e336..b4a8a78 100644
--- a/fs/ubifs/ubi.mk
+++ b/fs/ubifs/ubi.mk
@@ -13,11 +13,15 @@ endif
ROOTFS_UBI_DEPENDENCIES = rootfs-ubifs
define ROOTFS_UBI_CMD
- cp fs/ubifs/ubinize.cfg . ;\
+ cp fs/ubifs/ubinize.cfg $(BUILD_DIR)/_ubinize.cfg ;\
+ echo "vol_name=$(BR2_TARGET_ROOTFS_UBI_VOL_NAME)" \
+ >> $(BUILD_DIR)/_ubinize.cfg ;\
+ echo "vol_alignment=$(BR2_TARGET_ROOTFS_UBI_VOL_ALIGNMENT)" \
+ >> $(BUILD_DIR)/_ubinize.cfg ; \
echo "image=$$@fs" \
- >> ./ubinize.cfg ;\
- $(HOST_DIR)/usr/sbin/ubinize -o $$@ $(UBI_UBINIZE_OPTS) ubinize.cfg ;\
- rm ubinize.cfg
+ >> $(BUILD_DIR)/_ubinize.cfg ;\
+ $(HOST_DIR)/usr/sbin/ubinize -o $$@ $(UBI_UBINIZE_OPTS) $(BUILD_DIR)/_ubinize.cfg ;\
+ rm $(BUILD_DIR)/_ubinize.cfg
endef
$(eval $(call ROOTFS_TARGET,ubi))
diff --git a/fs/ubifs/ubinize.cfg b/fs/ubifs/ubinize.cfg
index 6515271..d4140ed 100644
--- a/fs/ubifs/ubinize.cfg
+++ b/fs/ubifs/ubinize.cfg
@@ -2,6 +2,4 @@
mode=ubi
vol_id=0
vol_type=dynamic
-vol_name=rootfs
-vol_alignment=1
vol_flags=autoresize
--
1.7.5.4
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