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/image/Makefile | 1 - target/linux/brcm2708/image/cmdline.txt | 2 +- 2 files changed, 1 insertion(+), 2 deletions(-) (limited to 'target/linux/brcm2708/image') diff --git a/target/linux/brcm2708/image/Makefile b/target/linux/brcm2708/image/Makefile index 691212de9f..326ef5a0ee 100644 --- a/target/linux/brcm2708/image/Makefile +++ b/target/linux/brcm2708/image/Makefile @@ -47,7 +47,6 @@ endef ### Devices ### define Device/Default - FILESYSTEMS := ext4 KERNEL := kernel-bin | kernel-img KERNEL_IMG := kernel.img IMAGES := sdcard.img.gz diff --git a/target/linux/brcm2708/image/cmdline.txt b/target/linux/brcm2708/image/cmdline.txt index 24f4f0c276..c1099afb00 100644 --- a/target/linux/brcm2708/image/cmdline.txt +++ b/target/linux/brcm2708/image/cmdline.txt @@ -1 +1 @@ -dwc_otg.lpm_enable=0 console=serial0,115200 kgdboc=serial0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=ext4 rootwait +dwc_otg.lpm_enable=0 console=serial0,115200 kgdboc=serial0,115200 console=tty1 root=/dev/mmcblk0p2 rootfstype=squashfs,ext4 rootwait -- cgit v1.2.3