ceph/src/mds/fscrypt.h

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6
   7  *
   8  * This is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License version 2.1, as published by the Free Software
  11  * Foundation.  See file COPYING.
  12  *
  13  */
  14
  15 #ifndef CEPHFS_FSCRYPT_H
  16 #define CEPHFS_FSCRYPT_H
  17
  18 struct ceph_fscrypt_last_block_header {
  19         __u8  ver;
  20         __u8  compat;
  21
  22         /* If the last block is located in a file hole the length
  23          * will be sizeof(i_version + file_offset + block_size),
  24          * or will plus to extra BLOCK SIZE.
  25          */
  26         uint32_t data_len;
  27
  28         /* inode change attr version */
  29         uint64_t change_attr;
  30
  31         /*
  32          * For a file hole, this will be 0, or it will be the offset from
  33          * which will write the last block
  34          */
  35         uint64_t file_offset;
  36
  37         /* It should always be the fscrypt block size */
  38         uint32_t block_size;
  39 };
  40
  41 #endif