On Thu, Sep 15, 2016 at 01:13:14PM +0200, iw3gtf@xxxxxxxx wrote: > Hi Sascha, > > thanks for the answer, > > > Hi Giorgio, > > > > On Wed, Sep 14, 2016 at 05:52:32PM +0200, iw3gtf@xxxxxxxx wrote: > > > Hi, > > > > > > I'm working on an embedded board with an iMX25 arm CPU and a nand flash. > > > > > > The board runs a linux kernel/userland. > > > > > > When the user updates the firmware, the running userland/kernel creates > > some > > > new ubi volumes on the nand, let's say 'kernel_next' and 'userland_next'. > > > On the next system reboot barebox looks if it finds, lets say, the > > 'kernel_next' volume > > > and, in this case, it removes the old one ('kernel'), creates a new, empty > > one ('kernel'), > > > copies 'kernel_next' to the just created 'kernel' and finally removes the > > 'kernel_next' > > > to complete the update. > > > > While this should work, why so complicated? Since this commit: > > > > | commit 892abde56c1c5a62d49d8b70c73e5d388e74345d > > | Author: Richard Weinberger <richard@xxxxxx> > > | Date: Mon Nov 24 22:30:10 2014 +0100 > > | > > | UBI: rename_volumes: Use UBI_METAONLY > > | > > | By using UBI_METAONLY in rename_volumes() it is now possible to rename > > | an UBI volume atomically while it is open for writing. > > | This is useful for firmware upgrades. > > > > It should be possible to just remove 'kernel' and rename 'kernel_next' to > > 'kernel' > > without bootloader intervention. > > This is a very good news for me, I already wanted to ask for a UBI rename feature. > Could you please elaborate a bit on this point: I looked for a shell command like the > 'ubirename', present in the 'mtd-utils' package, but could not find it. Maybe we just > need a new command implemented in '<barebox_root>/commands/ubi.c'. You can add a ubirename command, patches welcome. Anyway, I suggested to rename it under Linux since you write your new Kernel/rootfs under Linux aswell. Sascha -- Pengutronix e.K. | | Industrial Linux Solutions | http://www.pengutronix.de/ | Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 | _______________________________________________ barebox mailing list barebox@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/barebox