LXR linux/fs/btrfs/send.h

   1/*
   2 * Copyright (C) 2012 Alexander Block.  All rights reserved.
   3 * Copyright (C) 2012 STRATO.  All rights reserved.
   4 *
   5 * This program is free software; you can redistribute it and/or
   6 * modify it under the terms of the GNU General Public
   7 * License v2 as published by the Free Software Foundation.
   8 *
   9 * This program is distributed in the hope that it will be useful,
  10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12 * General Public License for more details.
  13 *
  14 * You should have received a copy of the GNU General Public
  15 * License along with this program; if not, write to the
  16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17 * Boston, MA 021110-1307, USA.
  18 */
  19
  20#include "ctree.h"
  21
  22#define BTRFS_SEND_STREAM_MAGIC "btrfs-stream"
  23#define BTRFS_SEND_STREAM_VERSION 1
  24
  25#define BTRFS_SEND_BUF_SIZE (1024 * 64)
  26#define BTRFS_SEND_READ_SIZE (1024 * 48)
  27
  28enum btrfs_tlv_type {
  29        BTRFS_TLV_U8,
  30        BTRFS_TLV_U16,
  31        BTRFS_TLV_U32,
  32        BTRFS_TLV_U64,
  33        BTRFS_TLV_BINARY,
  34        BTRFS_TLV_STRING,
  35        BTRFS_TLV_UUID,
  36        BTRFS_TLV_TIMESPEC,
  37};
  38
  39struct btrfs_stream_header {
  40        char magic[sizeof(BTRFS_SEND_STREAM_MAGIC)];
  41        __le32 version;
  42} __attribute__ ((__packed__));
  43
  44struct btrfs_cmd_header {
  45        /* len excluding the header */
  46        __le32 len;
  47        __le16 cmd;
  48        /* crc including the header with zero crc field */
  49        __le32 crc;
  50} __attribute__ ((__packed__));
  51
  52struct btrfs_tlv_header {
  53        __le16 tlv_type;
  54        /* len excluding the header */
  55        __le16 tlv_len;
  56} __attribute__ ((__packed__));
  57
  58/* commands */
  59enum btrfs_send_cmd {
  60        BTRFS_SEND_C_UNSPEC,
  61
  62        BTRFS_SEND_C_SUBVOL,
  63        BTRFS_SEND_C_SNAPSHOT,
  64
  65        BTRFS_SEND_C_MKFILE,
  66        BTRFS_SEND_C_MKDIR,
  67        BTRFS_SEND_C_MKNOD,
  68        BTRFS_SEND_C_MKFIFO,
  69        BTRFS_SEND_C_MKSOCK,
  70        BTRFS_SEND_C_SYMLINK,
  71
  72        BTRFS_SEND_C_RENAME,
  73        BTRFS_SEND_C_LINK,
  74        BTRFS_SEND_C_UNLINK,
  75        BTRFS_SEND_C_RMDIR,
  76
  77        BTRFS_SEND_C_SET_XATTR,
  78        BTRFS_SEND_C_REMOVE_XATTR,
  79
  80        BTRFS_SEND_C_WRITE,
  81        BTRFS_SEND_C_CLONE,
  82
  83        BTRFS_SEND_C_TRUNCATE,
  84        BTRFS_SEND_C_CHMOD,
  85        BTRFS_SEND_C_CHOWN,
  86        BTRFS_SEND_C_UTIMES,
  87
  88        BTRFS_SEND_C_END,
  89        BTRFS_SEND_C_UPDATE_EXTENT,
  90        __BTRFS_SEND_C_MAX,
  91};
  92#define BTRFS_SEND_C_MAX (__BTRFS_SEND_C_MAX - 1)
  93
  94/* attributes in send stream */
  95enum {
  96        BTRFS_SEND_A_UNSPEC,
  97
  98        BTRFS_SEND_A_UUID,
  99        BTRFS_SEND_A_CTRANSID,
 100
 101        BTRFS_SEND_A_INO,
 102        BTRFS_SEND_A_SIZE,
 103        BTRFS_SEND_A_MODE,
 104        BTRFS_SEND_A_UID,
 105        BTRFS_SEND_A_GID,
 106        BTRFS_SEND_A_RDEV,
 107        BTRFS_SEND_A_CTIME,
 108        BTRFS_SEND_A_MTIME,
 109        BTRFS_SEND_A_ATIME,
 110        BTRFS_SEND_A_OTIME,
 111
 112        BTRFS_SEND_A_XATTR_NAME,
 113        BTRFS_SEND_A_XATTR_DATA,
 114
 115        BTRFS_SEND_A_PATH,
 116        BTRFS_SEND_A_PATH_TO,
 117        BTRFS_SEND_A_PATH_LINK,
 118
 119        BTRFS_SEND_A_FILE_OFFSET,
 120        BTRFS_SEND_A_DATA,
 121
 122        BTRFS_SEND_A_CLONE_UUID,
 123        BTRFS_SEND_A_CLONE_CTRANSID,
 124        BTRFS_SEND_A_CLONE_PATH,
 125        BTRFS_SEND_A_CLONE_OFFSET,
 126        BTRFS_SEND_A_CLONE_LEN,
 127
 128        __BTRFS_SEND_A_MAX,
 129};
 130#define BTRFS_SEND_A_MAX (__BTRFS_SEND_A_MAX - 1)
 131
 132#ifdef __KERNEL__
 133long btrfs_ioctl_send(struct file *mnt_file, void __user *arg);
 134#endif
 135