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
  28 enum 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
  39 struct btrfs_stream_header {
  40         char magic[sizeof(BTRFS_SEND_STREAM_MAGIC)];
  41         __le32 version;
  42 } __attribute__ ((__packed__));
  43
  44 struct 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
  52 struct btrfs_tlv_header {
  53         __le16 tlv_type;
  54         /* len excluding the header */
  55         __le16 tlv_len;
  56 } __attribute__ ((__packed__));
  57
  58 /* commands */
  59 enum 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 */
  95 enum {
  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__
 133 long btrfs_ioctl_send(struct file *mnt_file, void __user *arg);
 134 int write_buf(struct file *filp, const void *buf, u32 len, loff_t *off);
 135 #endif