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fs/ext2: Remove support for auto-calculation of rootfs size

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Auto-calculation of the rootfs size cannot be done in a reliable way
as it depends on the host filesystem and is broken on non ext4 host
(see bugs [1] [2]). So let the user specify the size he wants for his
rootfs.

[1] https://bugs.busybox.net/show_bug.cgi?id=8831
[2] https://bugs.busybox.net/show_bug.cgi?id=9496

Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com>
Reviewed-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>
[Thomas: as suggested by Arnout, use 60 MB as the default size instead
of 64 MB.]
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
This commit is contained in:
Sébastien Szymanski
2017-03-24 17:20:29 +01:00
committed by Thomas Petazzoni
parent a655a74d1a
commit c6bca8cef0
4 changed files with 18 additions and 30 deletions
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13
fs/ext2/Config.in
View File

@@ -44,22 +44,15 @@ config BR2_TARGET_ROOTFS_EXT2_REV
config BR2_TARGET_ROOTFS_EXT2_LABEL
string "filesystem label"
# 61440 = 60MB, i.e usually small enough to fit on a 64MB media
config BR2_TARGET_ROOTFS_EXT2_BLOCKS
int "exact size in blocks (leave at 0 for auto calculation)"
default 0
int "exact size in blocks"
default 61440
config BR2_TARGET_ROOTFS_EXT2_INODES
int "exact number of inodes (leave at 0 for auto calculation)"
default 0
config BR2_TARGET_ROOTFS_EXT2_EXTRA_BLOCKS
int "extra size in blocks" if BR2_TARGET_ROOTFS_EXT2_BLOCKS = 0
default 0
help
Enter here the number of extra blocks of free space you
want on your filesystem. By default, Buildroot will not
leave much space free.
config BR2_TARGET_ROOTFS_EXT2_EXTRA_INODES
int "extra inodes" if BR2_TARGET_ROOTFS_EXT2_INODES = 0
default 0

1
fs/ext2/ext2.mk
View File

@@ -9,7 +9,6 @@ EXT2_OPTS = -G $(BR2_TARGET_ROOTFS_EXT2_GEN) -R $(BR2_TARGET_ROOTFS_EXT2_REV)
ifneq ($(strip $(BR2_TARGET_ROOTFS_EXT2_BLOCKS)),0)
EXT2_OPTS += -b $(BR2_TARGET_ROOTFS_EXT2_BLOCKS)
endif
EXT2_OPTS += -B $(BR2_TARGET_ROOTFS_EXT2_EXTRA_BLOCKS)
ifneq ($(strip $(BR2_TARGET_ROOTFS_EXT2_INODES)),0)
EXT2_OPTS += -i $(BR2_TARGET_ROOTFS_EXT2_INODES)