fs/btrfs/dev.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * BTRFS filesystem implementation for U-Boot
   4  *
   5  * 2017 Marek Behún, CZ.NIC, kabel@kernel.org
   6  */
   7
   8 #include <common.h>
   9 #include <blk.h>
  10 #include <compiler.h>
  11 #include <fs_internal.h>
  12
  13 struct blk_desc *btrfs_blk_desc;
  14 struct disk_partition *btrfs_part_info;
  15
  16 int btrfs_devread(u64 address, int byte_len, void *buf)
  17 {
  18         lbaint_t sector;
  19         int byte_offset;
  20
  21         sector = address >> btrfs_blk_desc->log2blksz;
  22         byte_offset = address % btrfs_blk_desc->blksz;
  23
  24         return fs_devread(btrfs_blk_desc, btrfs_part_info, sector, byte_offset,
  25                           byte_len, buf);
  26 }