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This incompat feature is used to denote that the filesystem stored its metadata checksum seed in the superblock. This is used to allow tune2fs changing the UUID on a mounted metdata_csum filesystem without having to rewrite all the disk metadata. However, the GRUB doesn't use the metadata checksum at all. So, it can just ignore this feature if it is enabled. This is consistent with the GRUB filesystem code in general which just does a best effort to access the filesystem's data. The checksum seed incompat feature has to be removed from the ignore list if the support for metadata checksum verification is added to the GRUB ext2 driver later. Suggested-by: Eric Sandeen <esandeen@redhat.com> Suggested-by: Lukas Czerner <lczerner@redhat.com> Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Lukas Czerner <lczerner@redhat.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. See the file MAINTAINERS for information about the GRUB maintainers, etc. If you found a security vulnerability in the GRUB please check the SECURITY file to get more information how to properly report this kind of bugs to the maintainers. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'