forked from Minki/linux
31db9f7c23
This patch introduces the BTRFS_IOC_SEND ioctl that is required for send. It allows btrfs-progs to implement full and incremental sends. Patches for btrfs-progs will follow. Signed-off-by: Alexander Block <ablock84@googlemail.com> Reviewed-by: David Sterba <dave@jikos.cz> Reviewed-by: Arne Jansen <sensille@gmx.net> Reviewed-by: Jan Schmidt <list.btrfs@jan-o-sch.net> Reviewed-by: Alex Lyakas <alex.bolshoy.btrfs@gmail.com>
134 lines
2.9 KiB
C
134 lines
2.9 KiB
C
/*
|
|
* Copyright (C) 2012 Alexander Block. All rights reserved.
|
|
* Copyright (C) 2012 STRATO. All rights reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public
|
|
* License v2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public
|
|
* License along with this program; if not, write to the
|
|
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
* Boston, MA 021110-1307, USA.
|
|
*/
|
|
|
|
#include "ctree.h"
|
|
|
|
#define BTRFS_SEND_STREAM_MAGIC "btrfs-stream"
|
|
#define BTRFS_SEND_STREAM_VERSION 1
|
|
|
|
#define BTRFS_SEND_BUF_SIZE (1024 * 64)
|
|
#define BTRFS_SEND_READ_SIZE (1024 * 48)
|
|
|
|
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,
|
|
|
|
BTRFS_SEND_C_SUBVOL,
|
|
BTRFS_SEND_C_SNAPSHOT,
|
|
|
|
BTRFS_SEND_C_MKFILE,
|
|
BTRFS_SEND_C_MKDIR,
|
|
BTRFS_SEND_C_MKNOD,
|
|
BTRFS_SEND_C_MKFIFO,
|
|
BTRFS_SEND_C_MKSOCK,
|
|
BTRFS_SEND_C_SYMLINK,
|
|
|
|
BTRFS_SEND_C_RENAME,
|
|
BTRFS_SEND_C_LINK,
|
|
BTRFS_SEND_C_UNLINK,
|
|
BTRFS_SEND_C_RMDIR,
|
|
|
|
BTRFS_SEND_C_SET_XATTR,
|
|
BTRFS_SEND_C_REMOVE_XATTR,
|
|
|
|
BTRFS_SEND_C_WRITE,
|
|
BTRFS_SEND_C_CLONE,
|
|
|
|
BTRFS_SEND_C_TRUNCATE,
|
|
BTRFS_SEND_C_CHMOD,
|
|
BTRFS_SEND_C_CHOWN,
|
|
BTRFS_SEND_C_UTIMES,
|
|
|
|
BTRFS_SEND_C_END,
|
|
__BTRFS_SEND_C_MAX,
|
|
};
|
|
#define BTRFS_SEND_C_MAX (__BTRFS_SEND_C_MAX - 1)
|
|
|
|
/* attributes in send stream */
|
|
enum {
|
|
BTRFS_SEND_A_UNSPEC,
|
|
|
|
BTRFS_SEND_A_UUID,
|
|
BTRFS_SEND_A_CTRANSID,
|
|
|
|
BTRFS_SEND_A_INO,
|
|
BTRFS_SEND_A_SIZE,
|
|
BTRFS_SEND_A_MODE,
|
|
BTRFS_SEND_A_UID,
|
|
BTRFS_SEND_A_GID,
|
|
BTRFS_SEND_A_RDEV,
|
|
BTRFS_SEND_A_CTIME,
|
|
BTRFS_SEND_A_MTIME,
|
|
BTRFS_SEND_A_ATIME,
|
|
BTRFS_SEND_A_OTIME,
|
|
|
|
BTRFS_SEND_A_XATTR_NAME,
|
|
BTRFS_SEND_A_XATTR_DATA,
|
|
|
|
BTRFS_SEND_A_PATH,
|
|
BTRFS_SEND_A_PATH_TO,
|
|
BTRFS_SEND_A_PATH_LINK,
|
|
|
|
BTRFS_SEND_A_FILE_OFFSET,
|
|
BTRFS_SEND_A_DATA,
|
|
|
|
BTRFS_SEND_A_CLONE_UUID,
|
|
BTRFS_SEND_A_CLONE_CTRANSID,
|
|
BTRFS_SEND_A_CLONE_PATH,
|
|
BTRFS_SEND_A_CLONE_OFFSET,
|
|
BTRFS_SEND_A_CLONE_LEN,
|
|
|
|
__BTRFS_SEND_A_MAX,
|
|
};
|
|
#define BTRFS_SEND_A_MAX (__BTRFS_SEND_A_MAX - 1)
|
|
|
|
#ifdef __KERNEL__
|
|
long btrfs_ioctl_send(struct file *mnt_file, void __user *arg);
|
|
#endif
|