LXR uboot/fs/btrfs/compat.h

   1// SPDX-License-Identifier: GPL-2.0+
   2
   3#ifndef __BTRFS_COMPAT_H__
   4#define __BTRFS_COMPAT_H__
   5
   6#include <linux/errno.h>
   7#include <fs_internal.h>
   8#include <uuid.h>
   9
  10/* Provide a compatibility layer to make code syncing easier */
  11
  12/* A simple wraper to for error() used in btrfs-progs */
  13#define error(fmt, ...)         pr_err("BTRFS: " fmt "\n", ##__VA_ARGS__)
  14
  15#define ASSERT(c) assert(c)
  16
  17#define BTRFS_UUID_UNPARSED_SIZE        37
  18
  19/* No <linux/limits.h> so have to define it here */
  20#define XATTR_NAME_MAX          255
  21#define PATH_MAX                4096
  22
  23/*
  24 * Macros to generate set/get funcs for the struct fields
  25 * assume there is a lefoo_to_cpu for every type, so lets make a simple
  26 * one for u8:
  27 */
  28#define le8_to_cpu(v) (v)
  29#define cpu_to_le8(v) (v)
  30#define __le8 u8
  31
  32/*
  33 * Macros to generate set/get funcs for the struct fields
  34 * assume there is a lefoo_to_cpu for every type, so lets make a simple
  35 * one for u8:
  36 */
  37#define le8_to_cpu(v) (v)
  38#define cpu_to_le8(v) (v)
  39#define __le8 u8
  40
  41#define get_unaligned_le8(p) (*((u8 *)(p)))
  42#define get_unaligned_8(p) (*((u8 *)(p)))
  43#define put_unaligned_le8(val,p) ((*((u8 *)(p))) = (val))
  44#define put_unaligned_8(val,p) ((*((u8 *)(p))) = (val))
  45
  46/*
  47 * Read data from device specified by @desc and @part
  48 *
  49 * U-boot equivalent of pread().
  50 *
  51 * Return the bytes of data read.
  52 * Return <0 for error.
  53 */
  54static inline int __btrfs_devread(struct blk_desc *desc,
  55                                  struct disk_partition *part,
  56                                  void *buf, size_t size, u64 offset)
  57{
  58        lbaint_t sector;
  59        int byte_offset;
  60        int ret;
  61
  62        sector = offset >> desc->log2blksz;
  63        byte_offset = offset % desc->blksz;
  64
  65        /* fs_devread() return 0 for error, >0 for success */
  66        ret = fs_devread(desc, part, sector, byte_offset, size, buf);
  67        if (!ret)
  68                return -EIO;
  69        return size;
  70}
  71
  72static inline void uuid_unparse(const u8 *uuid, char *out)
  73{
  74        return uuid_bin_to_str((unsigned char *)uuid, out, 0);
  75}
  76
  77static inline int is_power_of_2(unsigned long n)
  78{
  79        return (n != 0 && ((n & (n - 1)) == 0));
  80}
  81
  82#endif
  83