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send.h
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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_MAX,
90 };
91 #define BTRFS_SEND_C_MAX (__BTRFS_SEND_C_MAX - 1)
92 
93 /* attributes in send stream */
94 enum {
95  BTRFS_SEND_A_UNSPEC,
96 
97  BTRFS_SEND_A_UUID,
98  BTRFS_SEND_A_CTRANSID,
99 
100  BTRFS_SEND_A_INO,
101  BTRFS_SEND_A_SIZE,
102  BTRFS_SEND_A_MODE,
103  BTRFS_SEND_A_UID,
104  BTRFS_SEND_A_GID,
105  BTRFS_SEND_A_RDEV,
106  BTRFS_SEND_A_CTIME,
107  BTRFS_SEND_A_MTIME,
108  BTRFS_SEND_A_ATIME,
109  BTRFS_SEND_A_OTIME,
110 
111  BTRFS_SEND_A_XATTR_NAME,
112  BTRFS_SEND_A_XATTR_DATA,
113 
114  BTRFS_SEND_A_PATH,
115  BTRFS_SEND_A_PATH_TO,
116  BTRFS_SEND_A_PATH_LINK,
117 
118  BTRFS_SEND_A_FILE_OFFSET,
119  BTRFS_SEND_A_DATA,
120 
121  BTRFS_SEND_A_CLONE_UUID,
122  BTRFS_SEND_A_CLONE_CTRANSID,
123  BTRFS_SEND_A_CLONE_PATH,
124  BTRFS_SEND_A_CLONE_OFFSET,
125  BTRFS_SEND_A_CLONE_LEN,
126 
127  __BTRFS_SEND_A_MAX,
128 };
129 #define BTRFS_SEND_A_MAX (__BTRFS_SEND_A_MAX - 1)
130 
131 #ifdef __KERNEL__
132 long btrfs_ioctl_send(struct file *mnt_file, void __user *arg);
133 int write_buf(struct file *filp, const void *buf, u32 len, loff_t *off);
134 #endif
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