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kumquat-buildroot/fs/btrfs/btrfs.mk

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fs/btrfs: add support for generating a btrfs image This patch makes it possible to format the rootfs using btrfs. It introduces the option; BR2_TARGET_ROOTFS_BTRFS. When selected, the user is able to specify the filesystem size, label, options, and node and sector sizes. The new files are based on fs/ext2/{Config.in,ext2.mk} Signed-off-by: Robert J. Heywood <robert.heywood@codethink.co.uk> Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Tested-by: "Yann E. MORIN" <yann.morin.1998@free.fr> [Thomas: - fix issues pointed by Yann (duplicated empty line, missing quotes around default values for string options) - use -f option so that we don't have to remove the image file before creating it again - use the --byte-count option to set the filesystem size, which avoids the need for doing a "truncate -s" - remove the possible explanation of a mkfs.btrfs error. Indeed, mkfs.btrfs automatically extends the size of the image as needed, so the size passed can never be "too small". - fix check-package warnings in Config.in file.] Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2018-08-24 00:01:56 +02:00
################################################################################
#
# Build the btrfs root filesystem image
#
################################################################################
BTRFS_SIZE = $(call qstrip,$(BR2_TARGET_ROOTFS_BTRFS_SIZE))
ifeq ($(BR2_TARGET_ROOTFS_BTRFS)-$(BTRFS_SIZE),y-)
$(error BR2_TARGET_ROOTFS_BTRFS_SIZE cannot be empty)
endif
BTRFS_SIZE_NODE = $(call qstrip,$(BR2_TARGET_ROOTFS_BTRFS_SIZE_NODE))
BTRFS_SIZE_SECTOR = $(call qstrip,$(BR2_TARGET_ROOTFS_BTRFS_SIZE_SECTOR))
BTRFS_FEATURES = $(call qstrip,$(BR2_TARGET_ROOTFS_BTRFS_FEATURES))
# 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.
fs: don't use := when not needed Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr> Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
2019-10-26 10:45:59 +02:00
BTRFS_LABEL = $(subst ",,$(BR2_TARGET_ROOTFS_BTRFS_LABEL))
fs/btrfs: add support for generating a btrfs image This patch makes it possible to format the rootfs using btrfs. It introduces the option; BR2_TARGET_ROOTFS_BTRFS. When selected, the user is able to specify the filesystem size, label, options, and node and sector sizes. The new files are based on fs/ext2/{Config.in,ext2.mk} Signed-off-by: Robert J. Heywood <robert.heywood@codethink.co.uk> Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Tested-by: "Yann E. MORIN" <yann.morin.1998@free.fr> [Thomas: - fix issues pointed by Yann (duplicated empty line, missing quotes around default values for string options) - use -f option so that we don't have to remove the image file before creating it again - use the --byte-count option to set the filesystem size, which avoids the need for doing a "truncate -s" - remove the possible explanation of a mkfs.btrfs error. Indeed, mkfs.btrfs automatically extends the size of the image as needed, so the size passed can never be "too small". - fix check-package warnings in Config.in file.] Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2018-08-24 00:01:56 +02:00
# ")
BTRFS_OPTS = \
-f \
-r '$(TARGET_DIR)' \
-L '$(BTRFS_LABEL)' \
--byte-count '$(BTRFS_SIZE)' \
$(if $(BTRFS_SIZE_NODE),--nodesize '$(BTRFS_SIZE_NODE)') \
$(if $(BTRFS_SIZE_SECTOR),--sectorsize '$(BTRFS_SIZE_SECTOR)') \
$(if $(BTRFS_FEATURES),--features '$(BTRFS_FEATURES)')
ROOTFS_BTRFS_DEPENDENCIES = host-btrfs-progs
define ROOTFS_BTRFS_CMD
fs/btrfs: remove destination file before generation btrfs will happily use an existing destination file if it already exists, increasing its size if needed. Hoever, it will never decrease the size, even if the requested size is smaller than the existing file. So, remove any previously existing destination file before generating the new filesystem. Note: the original submission by Robert did that, but as this case was not obvious, the removal was dropped by a refactoring when the patch was initially applied. Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Cc: Robert J. Heywood <robert.heywood@codethink.co.uk> Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com> [Thomas: use $@ instead of $(@), use $(RM) instead of rm.] Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2018-08-25 19:47:14 +02:00
$(RM) -f $@
fs/btrfs: add support for generating a btrfs image This patch makes it possible to format the rootfs using btrfs. It introduces the option; BR2_TARGET_ROOTFS_BTRFS. When selected, the user is able to specify the filesystem size, label, options, and node and sector sizes. The new files are based on fs/ext2/{Config.in,ext2.mk} Signed-off-by: Robert J. Heywood <robert.heywood@codethink.co.uk> Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr> Tested-by: "Yann E. MORIN" <yann.morin.1998@free.fr> [Thomas: - fix issues pointed by Yann (duplicated empty line, missing quotes around default values for string options) - use -f option so that we don't have to remove the image file before creating it again - use the --byte-count option to set the filesystem size, which avoids the need for doing a "truncate -s" - remove the possible explanation of a mkfs.btrfs error. Indeed, mkfs.btrfs automatically extends the size of the image as needed, so the size passed can never be "too small". - fix check-package warnings in Config.in file.] Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
2018-08-24 00:01:56 +02:00
$(HOST_DIR)/bin/mkfs.btrfs $(BTRFS_OPTS) $@
endef
$(eval $(rootfs))
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