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b1f0067aba
This patch crossports volumes.[ch] from btrfs-progs, including: - btrfs_map_block() The core mechanism to map btrfs logical address to physical address. This version includes multi-device support, along with RAID56 support. - btrfs_scan_one_device() This is the function to register one btrfs device to the list. This is the main part of the multi-device btrfs assembling process. Although we're not going to support multiple devices until U-Boot allows us to scan one device without actually opening it. Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: Marek Behún <marek.behun@nic.cz> [trini: Use %zu in a debug print to avoid warning] Signed-off-by: Tom Rini <trini@konsulko.com>