186 lines
4.2 KiB
C
186 lines
4.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2012 Alexander Block. All rights reserved.
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* Copyright (C) 2012 STRATO. All rights reserved.
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*/
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#ifndef BTRFS_SEND_H
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#define BTRFS_SEND_H
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#include <linux/types.h>
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#define BTRFS_SEND_STREAM_MAGIC "btrfs-stream"
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/* Conditional support for the upcoming protocol version. */
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#ifdef CONFIG_BTRFS_DEBUG
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#define BTRFS_SEND_STREAM_VERSION 3
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#else
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#define BTRFS_SEND_STREAM_VERSION 2
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#endif
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/*
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* In send stream v1, no command is larger than 64K. In send stream v2, no
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* limit should be assumed, the buffer size is set to be a header with
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* compressed extent size.
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*/
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#define BTRFS_SEND_BUF_SIZE_V1 SZ_64K
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#define BTRFS_SEND_BUF_SIZE_V2 ALIGN(SZ_16K + BTRFS_MAX_COMPRESSED, PAGE_SIZE)
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struct inode;
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struct btrfs_ioctl_send_args;
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enum btrfs_tlv_type {
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BTRFS_TLV_U8,
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BTRFS_TLV_U16,
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BTRFS_TLV_U32,
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BTRFS_TLV_U64,
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BTRFS_TLV_BINARY,
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BTRFS_TLV_STRING,
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BTRFS_TLV_UUID,
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BTRFS_TLV_TIMESPEC,
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};
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struct btrfs_stream_header {
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char magic[sizeof(BTRFS_SEND_STREAM_MAGIC)];
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__le32 version;
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} __attribute__ ((__packed__));
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struct btrfs_cmd_header {
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/* len excluding the header */
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__le32 len;
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__le16 cmd;
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/* crc including the header with zero crc field */
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__le32 crc;
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} __attribute__ ((__packed__));
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struct btrfs_tlv_header {
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__le16 tlv_type;
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/* len excluding the header */
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__le16 tlv_len;
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} __attribute__ ((__packed__));
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/* commands */
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enum btrfs_send_cmd {
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BTRFS_SEND_C_UNSPEC = 0,
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/* Version 1 */
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BTRFS_SEND_C_SUBVOL = 1,
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BTRFS_SEND_C_SNAPSHOT = 2,
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BTRFS_SEND_C_MKFILE = 3,
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BTRFS_SEND_C_MKDIR = 4,
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BTRFS_SEND_C_MKNOD = 5,
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BTRFS_SEND_C_MKFIFO = 6,
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BTRFS_SEND_C_MKSOCK = 7,
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BTRFS_SEND_C_SYMLINK = 8,
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BTRFS_SEND_C_RENAME = 9,
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BTRFS_SEND_C_LINK = 10,
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BTRFS_SEND_C_UNLINK = 11,
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BTRFS_SEND_C_RMDIR = 12,
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BTRFS_SEND_C_SET_XATTR = 13,
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BTRFS_SEND_C_REMOVE_XATTR = 14,
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BTRFS_SEND_C_WRITE = 15,
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BTRFS_SEND_C_CLONE = 16,
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BTRFS_SEND_C_TRUNCATE = 17,
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BTRFS_SEND_C_CHMOD = 18,
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BTRFS_SEND_C_CHOWN = 19,
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BTRFS_SEND_C_UTIMES = 20,
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BTRFS_SEND_C_END = 21,
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BTRFS_SEND_C_UPDATE_EXTENT = 22,
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BTRFS_SEND_C_MAX_V1 = 22,
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/* Version 2 */
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BTRFS_SEND_C_FALLOCATE = 23,
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BTRFS_SEND_C_FILEATTR = 24,
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BTRFS_SEND_C_ENCODED_WRITE = 25,
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BTRFS_SEND_C_MAX_V2 = 25,
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/* Version 3 */
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BTRFS_SEND_C_ENABLE_VERITY = 26,
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BTRFS_SEND_C_MAX_V3 = 26,
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/* End */
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BTRFS_SEND_C_MAX = 26,
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};
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/* attributes in send stream */
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enum {
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BTRFS_SEND_A_UNSPEC = 0,
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/* Version 1 */
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BTRFS_SEND_A_UUID = 1,
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BTRFS_SEND_A_CTRANSID = 2,
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BTRFS_SEND_A_INO = 3,
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BTRFS_SEND_A_SIZE = 4,
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BTRFS_SEND_A_MODE = 5,
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BTRFS_SEND_A_UID = 6,
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BTRFS_SEND_A_GID = 7,
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BTRFS_SEND_A_RDEV = 8,
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BTRFS_SEND_A_CTIME = 9,
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BTRFS_SEND_A_MTIME = 10,
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BTRFS_SEND_A_ATIME = 11,
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BTRFS_SEND_A_OTIME = 12,
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BTRFS_SEND_A_XATTR_NAME = 13,
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BTRFS_SEND_A_XATTR_DATA = 14,
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BTRFS_SEND_A_PATH = 15,
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BTRFS_SEND_A_PATH_TO = 16,
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BTRFS_SEND_A_PATH_LINK = 17,
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BTRFS_SEND_A_FILE_OFFSET = 18,
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/*
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* As of send stream v2, this attribute is special: it must be the last
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* attribute in a command, its header contains only the type, and its
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* length is implicitly the remaining length of the command.
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*/
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BTRFS_SEND_A_DATA = 19,
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BTRFS_SEND_A_CLONE_UUID = 20,
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BTRFS_SEND_A_CLONE_CTRANSID = 21,
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BTRFS_SEND_A_CLONE_PATH = 22,
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BTRFS_SEND_A_CLONE_OFFSET = 23,
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BTRFS_SEND_A_CLONE_LEN = 24,
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BTRFS_SEND_A_MAX_V1 = 24,
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/* Version 2 */
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BTRFS_SEND_A_FALLOCATE_MODE = 25,
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/*
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* File attributes from the FS_*_FL namespace (i_flags, xflags),
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* translated to BTRFS_INODE_* bits (BTRFS_INODE_FLAG_MASK) and stored
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* in btrfs_inode_item::flags (represented by btrfs_inode::flags and
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* btrfs_inode::ro_flags).
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*/
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BTRFS_SEND_A_FILEATTR = 26,
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BTRFS_SEND_A_UNENCODED_FILE_LEN = 27,
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BTRFS_SEND_A_UNENCODED_LEN = 28,
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BTRFS_SEND_A_UNENCODED_OFFSET = 29,
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/*
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* COMPRESSION and ENCRYPTION default to NONE (0) if omitted from
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* BTRFS_SEND_C_ENCODED_WRITE.
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*/
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BTRFS_SEND_A_COMPRESSION = 30,
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BTRFS_SEND_A_ENCRYPTION = 31,
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BTRFS_SEND_A_MAX_V2 = 31,
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/* Version 3 */
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BTRFS_SEND_A_VERITY_ALGORITHM = 32,
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BTRFS_SEND_A_VERITY_BLOCK_SIZE = 33,
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BTRFS_SEND_A_VERITY_SALT_DATA = 34,
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BTRFS_SEND_A_VERITY_SIG_DATA = 35,
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BTRFS_SEND_A_MAX_V3 = 35,
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__BTRFS_SEND_A_MAX = 35,
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};
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long btrfs_ioctl_send(struct inode *inode, struct btrfs_ioctl_send_args *arg);
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#endif
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