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 #ifndef __BTRFS_SEND_H__
  21 #define __BTRFS_SEND_H__
  22
  23 #include "ctree.h"
  24
  25 #ifdef __cplusplus
  26 extern "C" {
  27 #endif
  28
  29 #define BTRFS_SEND_STREAM_MAGIC "btrfs-stream"
  30 #define BTRFS_SEND_STREAM_VERSION 1
  31
  32 #define BTRFS_SEND_BUF_SIZE SZ_64K
  33 #define BTRFS_SEND_READ_SIZE (1024 * 48)
  34
  35 enum btrfs_tlv_type {
  36         BTRFS_TLV_U8,
  37         BTRFS_TLV_U16,
  38         BTRFS_TLV_U32,
  39         BTRFS_TLV_U64,
  40         BTRFS_TLV_BINARY,
  41         BTRFS_TLV_STRING,
  42         BTRFS_TLV_UUID,
  43         BTRFS_TLV_TIMESPEC,
  44 };
  45
  46 struct btrfs_stream_header {
  47         char magic[sizeof(BTRFS_SEND_STREAM_MAGIC)];
  48         __le32 version;
  49 } __attribute__ ((__packed__));
  50
  51 struct btrfs_cmd_header {
  52         /* len excluding the header */
  53         __le32 len;
  54         __le16 cmd;
  55         /* crc including the header with zero crc field */
  56         __le32 crc;
  57 } __attribute__ ((__packed__));
  58
  59 struct btrfs_tlv_header {
  60         __le16 tlv_type;
  61         /* len excluding the header */
  62         __le16 tlv_len;
  63 } __attribute__ ((__packed__));
  64
  65 /* commands */
  66 enum btrfs_send_cmd {
  67         BTRFS_SEND_C_UNSPEC,
  68
  69         BTRFS_SEND_C_SUBVOL,
  70         BTRFS_SEND_C_SNAPSHOT,
  71
  72         BTRFS_SEND_C_MKFILE,
  73         BTRFS_SEND_C_MKDIR,
  74         BTRFS_SEND_C_MKNOD,
  75         BTRFS_SEND_C_MKFIFO,
  76         BTRFS_SEND_C_MKSOCK,
  77         BTRFS_SEND_C_SYMLINK,
  78
  79         BTRFS_SEND_C_RENAME,
  80         BTRFS_SEND_C_LINK,
  81         BTRFS_SEND_C_UNLINK,
  82         BTRFS_SEND_C_RMDIR,
  83
  84         BTRFS_SEND_C_SET_XATTR,
  85         BTRFS_SEND_C_REMOVE_XATTR,
  86
  87         BTRFS_SEND_C_WRITE,
  88         BTRFS_SEND_C_CLONE,
  89
  90         BTRFS_SEND_C_TRUNCATE,
  91         BTRFS_SEND_C_CHMOD,
  92         BTRFS_SEND_C_CHOWN,
  93         BTRFS_SEND_C_UTIMES,
  94
  95         BTRFS_SEND_C_END,
  96         BTRFS_SEND_C_UPDATE_EXTENT,
  97         __BTRFS_SEND_C_MAX,
  98 };
  99 #define BTRFS_SEND_C_MAX (__BTRFS_SEND_C_MAX - 1)
 100
 101 /* attributes in send stream */
 102 enum {
 103         BTRFS_SEND_A_UNSPEC,
 104
 105         BTRFS_SEND_A_UUID,
 106         BTRFS_SEND_A_CTRANSID,
 107
 108         BTRFS_SEND_A_INO,
 109         BTRFS_SEND_A_SIZE,
 110         BTRFS_SEND_A_MODE,
 111         BTRFS_SEND_A_UID,
 112         BTRFS_SEND_A_GID,
 113         BTRFS_SEND_A_RDEV,
 114         BTRFS_SEND_A_CTIME,
 115         BTRFS_SEND_A_MTIME,
 116         BTRFS_SEND_A_ATIME,
 117         BTRFS_SEND_A_OTIME,
 118
 119         BTRFS_SEND_A_XATTR_NAME,
 120         BTRFS_SEND_A_XATTR_DATA,
 121
 122         BTRFS_SEND_A_PATH,
 123         BTRFS_SEND_A_PATH_TO,
 124         BTRFS_SEND_A_PATH_LINK,
 125
 126         BTRFS_SEND_A_FILE_OFFSET,
 127         BTRFS_SEND_A_DATA,
 128
 129         BTRFS_SEND_A_CLONE_UUID,
 130         BTRFS_SEND_A_CLONE_CTRANSID,
 131         BTRFS_SEND_A_CLONE_PATH,
 132         BTRFS_SEND_A_CLONE_OFFSET,
 133         BTRFS_SEND_A_CLONE_LEN,
 134
 135         __BTRFS_SEND_A_MAX,
 136 };
 137 #define BTRFS_SEND_A_MAX (__BTRFS_SEND_A_MAX - 1)
 138
 139 #ifdef __KERNEL__
 140 long btrfs_ioctl_send(struct file *mnt_file, void __user *arg);
 141 #endif
 142
 143 #ifdef __cplusplus
 144 }
 145 #endif
 146
 147 #endif