linux/fs/btrfs/send.h
Omar Sandoval d681559280 btrfs: send: enable support for stream v2 and compressed writes
Now that the new support is implemented, allow the ioctl to accept v2
and the compressed flag, and update the version in sysfs.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2022-07-25 17:45:32 +02:00

163 lines
3.5 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (C) 2012 Alexander Block. All rights reserved.
* Copyright (C) 2012 STRATO. All rights reserved.
*/
#ifndef BTRFS_SEND_H
#define BTRFS_SEND_H
#include "ctree.h"
#define BTRFS_SEND_STREAM_MAGIC "btrfs-stream"
#define BTRFS_SEND_STREAM_VERSION 2
/*
* In send stream v1, no command is larger than 64K. In send stream v2, no limit
* should be assumed.
*/
#define BTRFS_SEND_BUF_SIZE_V1 SZ_64K
enum btrfs_tlv_type {
BTRFS_TLV_U8,
BTRFS_TLV_U16,
BTRFS_TLV_U32,
BTRFS_TLV_U64,
BTRFS_TLV_BINARY,
BTRFS_TLV_STRING,
BTRFS_TLV_UUID,
BTRFS_TLV_TIMESPEC,
};
struct btrfs_stream_header {
char magic[sizeof(BTRFS_SEND_STREAM_MAGIC)];
__le32 version;
} __attribute__ ((__packed__));
struct btrfs_cmd_header {
/* len excluding the header */
__le32 len;
__le16 cmd;
/* crc including the header with zero crc field */
__le32 crc;
} __attribute__ ((__packed__));
struct btrfs_tlv_header {
__le16 tlv_type;
/* len excluding the header */
__le16 tlv_len;
} __attribute__ ((__packed__));
/* commands */
enum btrfs_send_cmd {
BTRFS_SEND_C_UNSPEC = 0,
/* Version 1 */
BTRFS_SEND_C_SUBVOL = 1,
BTRFS_SEND_C_SNAPSHOT = 2,
BTRFS_SEND_C_MKFILE = 3,
BTRFS_SEND_C_MKDIR = 4,
BTRFS_SEND_C_MKNOD = 5,
BTRFS_SEND_C_MKFIFO = 6,
BTRFS_SEND_C_MKSOCK = 7,
BTRFS_SEND_C_SYMLINK = 8,
BTRFS_SEND_C_RENAME = 9,
BTRFS_SEND_C_LINK = 10,
BTRFS_SEND_C_UNLINK = 11,
BTRFS_SEND_C_RMDIR = 12,
BTRFS_SEND_C_SET_XATTR = 13,
BTRFS_SEND_C_REMOVE_XATTR = 14,
BTRFS_SEND_C_WRITE = 15,
BTRFS_SEND_C_CLONE = 16,
BTRFS_SEND_C_TRUNCATE = 17,
BTRFS_SEND_C_CHMOD = 18,
BTRFS_SEND_C_CHOWN = 19,
BTRFS_SEND_C_UTIMES = 20,
BTRFS_SEND_C_END = 21,
BTRFS_SEND_C_UPDATE_EXTENT = 22,
BTRFS_SEND_C_MAX_V1 = 22,
/* Version 2 */
BTRFS_SEND_C_FALLOCATE = 23,
BTRFS_SEND_C_SETFLAGS = 24,
BTRFS_SEND_C_ENCODED_WRITE = 25,
BTRFS_SEND_C_MAX_V2 = 25,
/* End */
BTRFS_SEND_C_MAX = 25,
};
/* attributes in send stream */
enum {
BTRFS_SEND_A_UNSPEC = 0,
/* Version 1 */
BTRFS_SEND_A_UUID = 1,
BTRFS_SEND_A_CTRANSID = 2,
BTRFS_SEND_A_INO = 3,
BTRFS_SEND_A_SIZE = 4,
BTRFS_SEND_A_MODE = 5,
BTRFS_SEND_A_UID = 6,
BTRFS_SEND_A_GID = 7,
BTRFS_SEND_A_RDEV = 8,
BTRFS_SEND_A_CTIME = 9,
BTRFS_SEND_A_MTIME = 10,
BTRFS_SEND_A_ATIME = 11,
BTRFS_SEND_A_OTIME = 12,
BTRFS_SEND_A_XATTR_NAME = 13,
BTRFS_SEND_A_XATTR_DATA = 14,
BTRFS_SEND_A_PATH = 15,
BTRFS_SEND_A_PATH_TO = 16,
BTRFS_SEND_A_PATH_LINK = 17,
BTRFS_SEND_A_FILE_OFFSET = 18,
/*
* As of send stream v2, this attribute is special: it must be the last
* attribute in a command, its header contains only the type, and its
* length is implicitly the remaining length of the command.
*/
BTRFS_SEND_A_DATA = 19,
BTRFS_SEND_A_CLONE_UUID = 20,
BTRFS_SEND_A_CLONE_CTRANSID = 21,
BTRFS_SEND_A_CLONE_PATH = 22,
BTRFS_SEND_A_CLONE_OFFSET = 23,
BTRFS_SEND_A_CLONE_LEN = 24,
BTRFS_SEND_A_MAX_V1 = 24,
/* Version 2 */
BTRFS_SEND_A_FALLOCATE_MODE = 25,
BTRFS_SEND_A_SETFLAGS_FLAGS = 26,
BTRFS_SEND_A_UNENCODED_FILE_LEN = 27,
BTRFS_SEND_A_UNENCODED_LEN = 28,
BTRFS_SEND_A_UNENCODED_OFFSET = 29,
/*
* COMPRESSION and ENCRYPTION default to NONE (0) if omitted from
* BTRFS_SEND_C_ENCODED_WRITE.
*/
BTRFS_SEND_A_COMPRESSION = 30,
BTRFS_SEND_A_ENCRYPTION = 31,
BTRFS_SEND_A_MAX_V2 = 31,
/* End */
BTRFS_SEND_A_MAX = 31,
};
#ifdef __KERNEL__
long btrfs_ioctl_send(struct inode *inode, struct btrfs_ioctl_send_args *arg);
#endif
#endif