From 707b6c815bba34e9783d2695020bb17385fdcf1d Mon Sep 17 00:00:00 2001 From: Christian Lamparter Date: Tue, 27 Mar 2018 19:42:18 +0200 Subject: brcm2708: add squashfs rootfs image MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch adds a image with squashfs as the root filesystem. A rootfs_data partition will be generated on the first boot and placed inside the rootfs partition (just after the squashfs image). advantages: - it is possible to migrate from an existing -ext4 installation and back via sysupgrade. - existing partition layout will not be lost. - slightly smaller image size. - support for attendedsysupgrade disadvantages: - needs f2fs + tools as well. This is because fs-tools decides on the blocksize of the sdcard. So either f2fs or ext4 can get choosen as the rootfs_data filesystem (depends on the size of the root partition). - rootfs_data is placed into the rootfs partition. This makes it difficult for tools that expect a /dev/mmc0pX device. It also makes it difficult for data recovery tools since they might not expect to find a embedded partition or will be confused. For people with existing build configurations: make sure to include mkf2fs and f2fsck package into the image... Otherwise the new -squashfs image will boot of a ram-overlay and won't keep the configurations after a reboot. Cc: Álvaro Fernández Rojas Cc: Paul Spooren Cc: Daniel Golle Signed-off-by: Christian Lamparter Acked-by: Daniel Golle --- target/linux/brcm2708/bcm2709/config-4.9 | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) (limited to 'target/linux/brcm2708/bcm2709') diff --git a/target/linux/brcm2708/bcm2709/config-4.9 b/target/linux/brcm2708/bcm2709/config-4.9 index 1134f0d113..4e505edced 100644 --- a/target/linux/brcm2708/bcm2709/config-4.9 +++ b/target/linux/brcm2708/bcm2709/config-4.9 @@ -155,6 +155,11 @@ CONFIG_ENABLE_MUST_CHECK=y CONFIG_EXT4_FS=y CONFIG_EXT4_FS_POSIX_ACL=y CONFIG_EXT4_FS_SECURITY=y +# CONFIG_F2FS_CHECK_FS is not set +CONFIG_F2FS_FS=y +# CONFIG_F2FS_FS_SECURITY is not set +CONFIG_F2FS_FS_XATTR=y +CONFIG_F2FS_STAT_FS=y CONFIG_FB=y CONFIG_FB_BCM2708=y CONFIG_FB_CFB_COPYAREA=y @@ -372,7 +377,6 @@ CONFIG_SG_POOL=y CONFIG_SMP=y CONFIG_SMP_ON_UP=y CONFIG_SPARSE_IRQ=y -# CONFIG_SQUASHFS is not set CONFIG_SRCU=y # CONFIG_STRIP_ASM_SYMS is not set CONFIG_SUSPEND=y -- cgit v1.2.3