GNU Linux-libre 4.19.211-gnu1
[releases.git] / fs / btrfs / send.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Copyright (C) 2012 Alexander Block.  All rights reserved.
4  * Copyright (C) 2012 STRATO.  All rights reserved.
5  */
6
7 #ifndef BTRFS_SEND_H
8 #define BTRFS_SEND_H
9
10 #include "ctree.h"
11
12 #define BTRFS_SEND_STREAM_MAGIC "btrfs-stream"
13 #define BTRFS_SEND_STREAM_VERSION 1
14
15 #define BTRFS_SEND_BUF_SIZE SZ_64K
16 #define BTRFS_SEND_READ_SIZE (48 * SZ_1K)
17
18 enum btrfs_tlv_type {
19         BTRFS_TLV_U8,
20         BTRFS_TLV_U16,
21         BTRFS_TLV_U32,
22         BTRFS_TLV_U64,
23         BTRFS_TLV_BINARY,
24         BTRFS_TLV_STRING,
25         BTRFS_TLV_UUID,
26         BTRFS_TLV_TIMESPEC,
27 };
28
29 struct btrfs_stream_header {
30         char magic[sizeof(BTRFS_SEND_STREAM_MAGIC)];
31         __le32 version;
32 } __attribute__ ((__packed__));
33
34 struct btrfs_cmd_header {
35         /* len excluding the header */
36         __le32 len;
37         __le16 cmd;
38         /* crc including the header with zero crc field */
39         __le32 crc;
40 } __attribute__ ((__packed__));
41
42 struct btrfs_tlv_header {
43         __le16 tlv_type;
44         /* len excluding the header */
45         __le16 tlv_len;
46 } __attribute__ ((__packed__));
47
48 /* commands */
49 enum btrfs_send_cmd {
50         BTRFS_SEND_C_UNSPEC,
51
52         BTRFS_SEND_C_SUBVOL,
53         BTRFS_SEND_C_SNAPSHOT,
54
55         BTRFS_SEND_C_MKFILE,
56         BTRFS_SEND_C_MKDIR,
57         BTRFS_SEND_C_MKNOD,
58         BTRFS_SEND_C_MKFIFO,
59         BTRFS_SEND_C_MKSOCK,
60         BTRFS_SEND_C_SYMLINK,
61
62         BTRFS_SEND_C_RENAME,
63         BTRFS_SEND_C_LINK,
64         BTRFS_SEND_C_UNLINK,
65         BTRFS_SEND_C_RMDIR,
66
67         BTRFS_SEND_C_SET_XATTR,
68         BTRFS_SEND_C_REMOVE_XATTR,
69
70         BTRFS_SEND_C_WRITE,
71         BTRFS_SEND_C_CLONE,
72
73         BTRFS_SEND_C_TRUNCATE,
74         BTRFS_SEND_C_CHMOD,
75         BTRFS_SEND_C_CHOWN,
76         BTRFS_SEND_C_UTIMES,
77
78         BTRFS_SEND_C_END,
79         BTRFS_SEND_C_UPDATE_EXTENT,
80         __BTRFS_SEND_C_MAX,
81 };
82 #define BTRFS_SEND_C_MAX (__BTRFS_SEND_C_MAX - 1)
83
84 /* attributes in send stream */
85 enum {
86         BTRFS_SEND_A_UNSPEC,
87
88         BTRFS_SEND_A_UUID,
89         BTRFS_SEND_A_CTRANSID,
90
91         BTRFS_SEND_A_INO,
92         BTRFS_SEND_A_SIZE,
93         BTRFS_SEND_A_MODE,
94         BTRFS_SEND_A_UID,
95         BTRFS_SEND_A_GID,
96         BTRFS_SEND_A_RDEV,
97         BTRFS_SEND_A_CTIME,
98         BTRFS_SEND_A_MTIME,
99         BTRFS_SEND_A_ATIME,
100         BTRFS_SEND_A_OTIME,
101
102         BTRFS_SEND_A_XATTR_NAME,
103         BTRFS_SEND_A_XATTR_DATA,
104
105         BTRFS_SEND_A_PATH,
106         BTRFS_SEND_A_PATH_TO,
107         BTRFS_SEND_A_PATH_LINK,
108
109         BTRFS_SEND_A_FILE_OFFSET,
110         BTRFS_SEND_A_DATA,
111
112         BTRFS_SEND_A_CLONE_UUID,
113         BTRFS_SEND_A_CLONE_CTRANSID,
114         BTRFS_SEND_A_CLONE_PATH,
115         BTRFS_SEND_A_CLONE_OFFSET,
116         BTRFS_SEND_A_CLONE_LEN,
117
118         __BTRFS_SEND_A_MAX,
119 };
120 #define BTRFS_SEND_A_MAX (__BTRFS_SEND_A_MAX - 1)
121
122 #ifdef __KERNEL__
123 long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg);
124 #endif
125
126 #endif