diff options
Diffstat (limited to 'fs/btrfs/compat.h')
-rw-r--r-- | fs/btrfs/compat.h | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/fs/btrfs/compat.h b/fs/btrfs/compat.h new file mode 100644 index 0000000000..b354c17a5c --- /dev/null +++ b/fs/btrfs/compat.h @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0+ + +#ifndef __BTRFS_COMPAT_H__ +#define __BTRFS_COMPAT_H__ + +#include <linux/errno.h> +#include <fs_internal.h> +#include <uuid.h> + +/* Provide a compatibility layer to make code syncing easier */ + +/* A simple wraper to for error() used in btrfs-progs */ +#define error(fmt, ...) pr_err("BTRFS: " fmt "\n", ##__VA_ARGS__) + +#define BTRFS_UUID_UNPARSED_SIZE 37 + +/* + * Macros to generate set/get funcs for the struct fields + * assume there is a lefoo_to_cpu for every type, so lets make a simple + * one for u8: + */ +#define le8_to_cpu(v) (v) +#define cpu_to_le8(v) (v) +#define __le8 u8 + +/* + * Read data from device specified by @desc and @part + * + * U-boot equivalent of pread(). + * + * Return the bytes of data read. + * Return <0 for error. + */ +static inline int __btrfs_devread(struct blk_desc *desc, + struct disk_partition *part, + void *buf, size_t size, u64 offset) +{ + lbaint_t sector; + int byte_offset; + int ret; + + sector = offset >> desc->log2blksz; + byte_offset = offset % desc->blksz; + + /* fs_devread() return 0 for error, >0 for success */ + ret = fs_devread(desc, part, sector, byte_offset, size, buf); + if (!ret) + return -EIO; + return size; +} + +static inline void uuid_unparse(const u8 *uuid, char *out) +{ + return uuid_bin_to_str((unsigned char *)uuid, out, 0); +} + +#endif |