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/* 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 <linux/types.h>
#include <linux/sizes.h>
#include <linux/align.h>
struct btrfs_inode;
struct btrfs_ioctl_send_args;
#define BTRFS_SEND_STREAM_MAGIC "btrfs-stream"
/* Conditional support for the upcoming protocol version. */
#ifdef CONFIG_BTRFS_DEBUG
#define BTRFS_SEND_STREAM_VERSION 3
#else
#define BTRFS_SEND_STREAM_VERSION 2
#endif
/*
* In send stream v1, no command is larger than 64K. In send stream v2, no
* limit should be assumed, the buffer size is set to be a header with
* compressed extent size.
*/
#define BTRFS_SEND_BUF_SIZE_V1 SZ_64K
#define BTRFS_SEND_BUF_SIZE_V2 ALIGN(SZ_16K + BTRFS_MAX_COMPRESSED, PAGE_SIZE)
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_FILEATTR = 24,
BTRFS_SEND_C_ENCODED_WRITE = 25,
BTRFS_SEND_C_MAX_V2 = 25,
/* Version 3 */
BTRFS_SEND_C_ENABLE_VERITY = 26,
BTRFS_SEND_C_MAX_V3 = 26,
/* End */
BTRFS_SEND_C_MAX = 26,
};
/* 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,
/*
* File attributes from the FS_*_FL namespace (i_flags, xflags),
* translated to BTRFS_INODE_* bits (BTRFS_INODE_FLAG_MASK) and stored
* in btrfs_inode_item::flags (represented by btrfs_inode::flags and
* btrfs_inode::ro_flags).
*/
BTRFS_SEND_A_FILEATTR = 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,
/* Version 3 */
BTRFS_SEND_A_VERITY_ALGORITHM = 32,
BTRFS_SEND_A_VERITY_BLOCK_SIZE = 33,
BTRFS_SEND_A_VERITY_SALT_DATA = 34,
BTRFS_SEND_A_VERITY_SIG_DATA = 35,
BTRFS_SEND_A_MAX_V3 = 35,
__BTRFS_SEND_A_MAX = 35,
};
long btrfs_ioctl_send(struct btrfs_inode *inode, const struct btrfs_ioctl_send_args *arg);
#endif
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