8356c423e6
The initial proposal for file attributes was built on simply doing SETFLAGS but this builds on an old and non-extensible interface that has no direct mapping for all inode flags. There's a unified interface fileattr that covers file attributes and xflags, it should be possible to add new bits. On the protocol level the value is copied as-is in the original inode but this does not provide enough information how to apply the bits on the receiving side. Eg. IMMUTABLE flag prevents any changes to the file and has to be handled manually. The receiving side does not apply the bits yet, only parses it from the stream. Signed-off-by: David Sterba <dsterba@suse.com>
178 lines
4.2 KiB
C
178 lines
4.2 KiB
C
/*
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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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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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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 "kernel-shared/ctree.h"
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#define BTRFS_SEND_STREAM_MAGIC "btrfs-stream"
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#define BTRFS_SEND_STREAM_VERSION 2
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/*
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* In send stream v1, no command is larger than 64KiB. In send stream v2, no limit
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* should be assumed.
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*/
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#define BTRFS_SEND_BUF_SIZE_V1 (64 * 1024)
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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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/* End */
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BTRFS_SEND_C_MAX = 25,
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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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/* End */
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BTRFS_SEND_A_MAX = 31,
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};
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#endif
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