linux/fs/cifs/cifs_ioctl.h

/*
 *   fs/cifs/cifs_ioctl.h
 *
 *   Structure definitions for io control for cifs/smb3
 *
 *   Copyright (c) 2015 Steve French <steve.french@primarydata.com>
 *
 *   This library is free software; you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published
 *   by the Free Software Foundation; either version 2.1 of the License, or
 *   (at your option) any later version.
 *
 *   This library 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 Lesser General Public License for more details.
 *
 */

struct smb_mnt_fs_info {
	__u32	version; /* 0001 */
	__u16	protocol_id;
	__u16	tcon_flags;
	__u32	vol_serial_number;
	__u32	vol_create_time;
	__u32	share_caps;
	__u32	share_flags;
	__u32	sector_flags;
	__u32	optimal_sector_size;
	__u32	max_bytes_chunk;
	__u32	fs_attributes;
	__u32	max_path_component;
	__u32	device_type;
	__u32	device_characteristics;
	__u32	maximal_access;
	__u64   cifs_posix_caps;
} __packed;

struct smb_snapshot_array {
	__u32	number_of_snapshots;
	__u32	number_of_snapshots_returned;
	__u32	snapshot_array_size;
	/*	snapshots[]; */
} __packed;

/* query_info flags */
#define PASSTHRU_QUERY_INFO	0x00000000
#define PASSTHRU_FSCTL		0x00000001
struct smb_query_info {
	__u32   info_type;
	__u32   file_info_class;
	__u32   additional_information;
	__u32   flags;
	__u32	input_buffer_length;
	__u32	output_buffer_length;
	/* char buffer[]; */
} __packed;

#define CIFS_IOCTL_MAGIC	0xCF
#define CIFS_IOC_COPYCHUNK_FILE	_IOW(CIFS_IOCTL_MAGIC, 3, int)
#define CIFS_IOC_SET_INTEGRITY  _IO(CIFS_IOCTL_MAGIC, 4)
#define CIFS_IOC_GET_MNT_INFO _IOR(CIFS_IOCTL_MAGIC, 5, struct smb_mnt_fs_info)
#define CIFS_ENUMERATE_SNAPSHOTS _IOR(CIFS_IOCTL_MAGIC, 6, struct smb_snapshot_array)
#define CIFS_QUERY_INFO _IOWR(CIFS_IOCTL_MAGIC, 7, struct smb_query_info)