Hi All, the aim of this patches set is to provide support for a BTRFS raid5/6 filesystem in GRUB.
The first patch, implements the basic support for raid5/6. I.e this works when all the disks are present. The next 4 patches, are preparatory ones. The last two implements the support for raid5/6 recovery. It allow to read from the filesystem even when 1 or 2 (for raid 6) disk(s) are missing. The last one is the more controversial. The code for the raid6 recovery is copied from the GRUB file reaid6_recovery.c . I preferred this approach, because the original code assumes that the read is GRUB_DISK_SECTOR_SIZE bytes based (512 bytes). Instead the GRUB BTRFS implementation need to read the disk with a granularity of the byte. I tried to update the code (and the function which the code calls), but the change was quite invasive. So for now I preferred to duplicating the code, to get some feedback. I tested the code in grub-emu, and it works (for me) both with all the disks, and with some disks missing. I checked the sh1sums calculated from grub and from linux and these matched. Comments are welcome. BR G.Baroncelli -- gpg @keyserver.linux.it: Goffredo Baroncelli <kreijackATinwind.it> Key fingerprint BBF5 1610 0B64 DAC6 5F7D 17B2 0EDA 9B37 8B82 E0B5 _______________________________________________ Grub-devel mailing list Grub-devel@gnu.org https://lists.gnu.org/mailman/listinfo/grub-devel
