/*
 *   fs/cifs/smb2pdu.h
 *
 *   Copyright (c) International Business Machines  Corp., 2009, 2013
 *                 Etersoft, 2012
 *   Author(s): Steve French (sfrench@us.ibm.com)
 *              Pavel Shilovsky (pshilovsky@samba.org) 2012
 *
 *   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.
 *
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with this library; if not, write to the Free Software
 *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifndef _SMB2PDU_H
#define _SMB2PDU_H

#include <net/sock.h>
#include <cifsacl.h>

/*
 * Note that, due to trying to use names similar to the protocol specifications,
 * there are many mixed case field names in the structures below.  Although
 * this does not match typical Linux kernel style, it is necessary to be
 * be able to match against the protocol specfication.
 *
 * SMB2 commands
 * Some commands have minimal (wct=0,bcc=0), or uninteresting, responses
 * (ie no useful data other than the SMB error code itself) and are marked such.
 * Knowing this helps avoid response buffer allocations and copy in some cases.
 */

/* List of commands in host endian */
#define SMB2_NEGOTIATE_HE	0x0000
#define SMB2_SESSION_SETUP_HE	0x0001
#define SMB2_LOGOFF_HE		0x0002 /* trivial request/resp */
#define SMB2_TREE_CONNECT_HE	0x0003
#define SMB2_TREE_DISCONNECT_HE	0x0004 /* trivial req/resp */
#define SMB2_CREATE_HE		0x0005
#define SMB2_CLOSE_HE		0x0006
#define SMB2_FLUSH_HE		0x0007 /* trivial resp */
#define SMB2_READ_HE		0x0008
#define SMB2_WRITE_HE		0x0009
#define SMB2_LOCK_HE		0x000A
#define SMB2_IOCTL_HE		0x000B
#define SMB2_CANCEL_HE		0x000C
#define SMB2_ECHO_HE		0x000D
#define SMB2_QUERY_DIRECTORY_HE	0x000E
#define SMB2_CHANGE_NOTIFY_HE	0x000F
#define SMB2_QUERY_INFO_HE	0x0010
#define SMB2_SET_INFO_HE	0x0011
#define SMB2_OPLOCK_BREAK_HE	0x0012

/* The same list in little endian */
#define SMB2_NEGOTIATE		cpu_to_le16(SMB2_NEGOTIATE_HE)
#define SMB2_SESSION_SETUP	cpu_to_le16(SMB2_SESSION_SETUP_HE)
#define SMB2_LOGOFF		cpu_to_le16(SMB2_LOGOFF_HE)
#define SMB2_TREE_CONNECT	cpu_to_le16(SMB2_TREE_CONNECT_HE)
#define SMB2_TREE_DISCONNECT	cpu_to_le16(SMB2_TREE_DISCONNECT_HE)
#define SMB2_CREATE		cpu_to_le16(SMB2_CREATE_HE)
#define SMB2_CLOSE		cpu_to_le16(SMB2_CLOSE_HE)
#define SMB2_FLUSH		cpu_to_le16(SMB2_FLUSH_HE)
#define SMB2_READ		cpu_to_le16(SMB2_READ_HE)
#define SMB2_WRITE		cpu_to_le16(SMB2_WRITE_HE)
#define SMB2_LOCK		cpu_to_le16(SMB2_LOCK_HE)
#define SMB2_IOCTL		cpu_to_le16(SMB2_IOCTL_HE)
#define SMB2_CANCEL		cpu_to_le16(SMB2_CANCEL_HE)
#define SMB2_ECHO		cpu_to_le16(SMB2_ECHO_HE)
#define SMB2_QUERY_DIRECTORY	cpu_to_le16(SMB2_QUERY_DIRECTORY_HE)
#define SMB2_CHANGE_NOTIFY	cpu_to_le16(SMB2_CHANGE_NOTIFY_HE)
#define SMB2_QUERY_INFO		cpu_to_le16(SMB2_QUERY_INFO_HE)
#define SMB2_SET_INFO		cpu_to_le16(SMB2_SET_INFO_HE)
#define SMB2_OPLOCK_BREAK	cpu_to_le16(SMB2_OPLOCK_BREAK_HE)

#define SMB2_INTERNAL_CMD	cpu_to_le16(0xFFFF)

#define NUMBER_OF_SMB2_COMMANDS	0x0013

/* 52 transform hdr + 64 hdr + 88 create rsp */
#define SMB2_TRANSFORM_HEADER_SIZE 52
#define MAX_SMB2_HDR_SIZE 204

#define SMB2_PROTO_NUMBER cpu_to_le32(0x424d53fe)
#define SMB2_TRANSFORM_PROTO_NUM cpu_to_le32(0x424d53fd)

/*
 * SMB2 Header Definition
 *
 * "MBZ" :  Must be Zero
 * "BB"  :  BugBug, Something to check/review/analyze later
 * "PDU" :  "Protocol Data Unit" (ie a network "frame")
 *
 */

#define SMB2_HEADER_STRUCTURE_SIZE cpu_to_le16(64)

struct smb2_sync_hdr {
	__le32 ProtocolId;	/* 0xFE 'S' 'M' 'B' */
	__le16 StructureSize;	/* 64 */
	__le16 CreditCharge;	/* MBZ */
	__le32 Status;		/* Error from server */
	__le16 Command;
	__le16 CreditRequest;  /* CreditResponse */
	__le32 Flags;
	__le32 NextCommand;
	__le64 MessageId;
	__le32 ProcessId;
	__u32  TreeId;		/* opaque - so do not make little endian */
	__u64  SessionId;	/* opaque - so do not make little endian */
	__u8   Signature[16];
} __packed;

struct smb2_sync_pdu {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize2; /* size of wct area (varies, request specific) */
} __packed;

#define SMB3_AES128CCM_NONCE 11
#define SMB3_AES128GCM_NONCE 12

struct smb2_transform_hdr {
	__le32 ProtocolId;	/* 0xFD 'S' 'M' 'B' */
	__u8   Signature[16];
	__u8   Nonce[16];
	__le32 OriginalMessageSize;
	__u16  Reserved1;
	__le16 Flags; /* EncryptionAlgorithm */
	__u64  SessionId;
} __packed;

/*
 *	SMB2 flag definitions
 */
#define SMB2_FLAGS_SERVER_TO_REDIR	cpu_to_le32(0x00000001)
#define SMB2_FLAGS_ASYNC_COMMAND	cpu_to_le32(0x00000002)
#define SMB2_FLAGS_RELATED_OPERATIONS	cpu_to_le32(0x00000004)
#define SMB2_FLAGS_SIGNED		cpu_to_le32(0x00000008)
#define SMB2_FLAGS_PRIORITY_MASK	cpu_to_le32(0x00000070) /* SMB3.1.1 */
#define SMB2_FLAGS_DFS_OPERATIONS	cpu_to_le32(0x10000000)
#define SMB2_FLAGS_REPLAY_OPERATION	cpu_to_le32(0x20000000) /* SMB3 & up */

/*
 *	Definitions for SMB2 Protocol Data Units (network frames)
 *
 *  See MS-SMB2.PDF specification for protocol details.
 *  The Naming convention is the lower case version of the SMB2
 *  command code name for the struct. Note that structures must be packed.
 *
 */

#define COMPOUND_FID 0xFFFFFFFFFFFFFFFFULL

#define SMB2_ERROR_STRUCTURE_SIZE2 cpu_to_le16(9)

struct smb2_err_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize;
	__le16 Reserved; /* MBZ */
	__le32 ByteCount;  /* even if zero, at least one byte follows */
	__u8   ErrorData[1];  /* variable length */
} __packed;

#define SYMLINK_ERROR_TAG 0x4c4d5953

struct smb2_symlink_err_rsp {
	__le32 SymLinkLength;
	__le32 SymLinkErrorTag;
	__le32 ReparseTag;
	__le16 ReparseDataLength;
	__le16 UnparsedPathLength;
	__le16 SubstituteNameOffset;
	__le16 SubstituteNameLength;
	__le16 PrintNameOffset;
	__le16 PrintNameLength;
	__le32 Flags;
	__u8  PathBuffer[0];
} __packed;

/* SMB 3.1.1 and later dialects. See MS-SMB2 section 2.2.2.1 */
struct smb2_error_context_rsp {
	__le32 ErrorDataLength;
	__le32 ErrorId;
	__u8  ErrorContextData; /* ErrorDataLength long array */
} __packed;

/* Defines for Type field below (see MS-SMB2 2.2.2.2.2.1) */
#define MOVE_DST_IPADDR_V4	cpu_to_le32(0x00000001)
#define MOVE_DST_IPADDR_V6	cpu_to_le32(0x00000002)

struct move_dst_ipaddr {
	__le32 Type;
	__u32  Reserved;
	__u8   address[16]; /* IPv4 followed by 12 bytes rsvd or IPv6 address */
} __packed;

struct share_redirect_error_context_rsp {
	__le32 StructureSize;
	__le32 NotificationType;
	__le32 ResourceNameOffset;
	__le32 ResourceNameLength;
	__le16 Flags;
	__le16 TargetType;
	__le32 IPAddrCount;
	struct move_dst_ipaddr IpAddrMoveList[0];
	/* __u8 ResourceName[] */ /* Name of share as counted Unicode string */
} __packed;

#define SMB2_CLIENT_GUID_SIZE 16

struct smb2_negotiate_req {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 36 */
	__le16 DialectCount;
	__le16 SecurityMode;
	__le16 Reserved;	/* MBZ */
	__le32 Capabilities;
	__u8   ClientGUID[SMB2_CLIENT_GUID_SIZE];
	/* In SMB3.02 and earlier next three were MBZ le64 ClientStartTime */
	__le32 NegotiateContextOffset; /* SMB3.1.1 only. MBZ earlier */
	__le16 NegotiateContextCount;  /* SMB3.1.1 only. MBZ earlier */
	__le16 Reserved2;
	__le16 Dialects[1]; /* One dialect (vers=) at a time for now */
} __packed;

/* Dialects */
#define SMB10_PROT_ID 0x0000 /* local only, not sent on wire w/CIFS negprot */
#define SMB20_PROT_ID 0x0202
#define SMB21_PROT_ID 0x0210
#define SMB30_PROT_ID 0x0300
#define SMB302_PROT_ID 0x0302
#define SMB311_PROT_ID 0x0311
#define BAD_PROT_ID   0xFFFF

/* SecurityMode flags */
#define	SMB2_NEGOTIATE_SIGNING_ENABLED	0x0001
#define SMB2_NEGOTIATE_SIGNING_REQUIRED	0x0002
#define SMB2_SEC_MODE_FLAGS_ALL		0x0003

/* Capabilities flags */
#define SMB2_GLOBAL_CAP_DFS		0x00000001
#define SMB2_GLOBAL_CAP_LEASING		0x00000002 /* Resp only New to SMB2.1 */
#define SMB2_GLOBAL_CAP_LARGE_MTU	0X00000004 /* Resp only New to SMB2.1 */
#define SMB2_GLOBAL_CAP_MULTI_CHANNEL	0x00000008 /* New to SMB3 */
#define SMB2_GLOBAL_CAP_PERSISTENT_HANDLES 0x00000010 /* New to SMB3 */
#define SMB2_GLOBAL_CAP_DIRECTORY_LEASING  0x00000020 /* New to SMB3 */
#define SMB2_GLOBAL_CAP_ENCRYPTION	0x00000040 /* New to SMB3 */
/* Internal types */
#define SMB2_NT_FIND			0x00100000
#define SMB2_LARGE_FILES		0x00200000


/* Negotiate Contexts - ContextTypes. See MS-SMB2 section 2.2.3.1 for details */
#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES	cpu_to_le16(1)
#define SMB2_ENCRYPTION_CAPABILITIES		cpu_to_le16(2)
#define SMB2_COMPRESSION_CAPABILITIES		cpu_to_le16(3)
#define SMB2_NETNAME_NEGOTIATE_CONTEXT_ID	cpu_to_le16(5)
#define SMB2_POSIX_EXTENSIONS_AVAILABLE		cpu_to_le16(0x100)

struct smb2_neg_context {
	__le16	ContextType;
	__le16	DataLength;
	__le32	Reserved;
	/* Followed by array of data */
} __packed;

#define SMB311_SALT_SIZE			32
/* Hash Algorithm Types */
#define SMB2_PREAUTH_INTEGRITY_SHA512	cpu_to_le16(0x0001)
#define SMB2_PREAUTH_HASH_SIZE 64

#define MIN_PREAUTH_CTXT_DATA_LEN	(SMB311_SALT_SIZE + 6)
struct smb2_preauth_neg_context {
	__le16	ContextType; /* 1 */
	__le16	DataLength;
	__le32	Reserved;
	__le16	HashAlgorithmCount; /* 1 */
	__le16	SaltLength;
	__le16	HashAlgorithms; /* HashAlgorithms[0] since only one defined */
	__u8	Salt[SMB311_SALT_SIZE];
} __packed;

/* Encryption Algorithms Ciphers */
#define SMB2_ENCRYPTION_AES128_CCM	cpu_to_le16(0x0001)
#define SMB2_ENCRYPTION_AES128_GCM	cpu_to_le16(0x0002)

/* Min encrypt context data is one cipher so 2 bytes + 2 byte count field */
#define MIN_ENCRYPT_CTXT_DATA_LEN	4
struct smb2_encryption_neg_context {
	__le16	ContextType; /* 2 */
	__le16	DataLength;
	__le32	Reserved;
	__le16	CipherCount; /* AES-128-GCM and AES-128-CCM */
	__le16	Ciphers[2];
} __packed;

/* See MS-SMB2 2.2.3.1.3 */
#define SMB3_COMPRESS_NONE	cpu_to_le16(0x0000)
#define SMB3_COMPRESS_LZNT1	cpu_to_le16(0x0001)
#define SMB3_COMPRESS_LZ77	cpu_to_le16(0x0002)
#define SMB3_COMPRESS_LZ77_HUFF	cpu_to_le16(0x0003)

struct smb2_compression_capabilities_context {
	__le16	ContextType; /* 3 */
	__le16  DataLength;
	__u32	Reserved;
	__le16	CompressionAlgorithmCount;
	__u16	Padding;
	__u32	Reserved1;
	__le16	CompressionAlgorithms[3];
} __packed;

/*
 * For smb2_netname_negotiate_context_id See MS-SMB2 2.2.3.1.4.
 * Its struct simply contains NetName, an array of Unicode characters
 */
struct smb2_netname_neg_context {
	__le16	ContextType; /* 0x100 */
	__le16	DataLength;
	__le32	Reserved;
	__le16	NetName[0]; /* hostname of target converted to UCS-2 */
} __packed;

#define POSIX_CTXT_DATA_LEN	16
struct smb2_posix_neg_context {
	__le16	ContextType; /* 0x100 */
	__le16	DataLength;
	__le32	Reserved;
	__u8	Name[16]; /* POSIX ctxt GUID 93AD25509CB411E7B42383DE968BCD7C */
} __packed;

struct smb2_negotiate_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize;	/* Must be 65 */
	__le16 SecurityMode;
	__le16 DialectRevision;
	__le16 NegotiateContextCount;	/* Prior to SMB3.1.1 was Reserved & MBZ */
	__u8   ServerGUID[16];
	__le32 Capabilities;
	__le32 MaxTransactSize;
	__le32 MaxReadSize;
	__le32 MaxWriteSize;
	__le64 SystemTime;	/* MBZ */
	__le64 ServerStartTime;
	__le16 SecurityBufferOffset;
	__le16 SecurityBufferLength;
	__le32 NegotiateContextOffset;	/* Pre:SMB3.1.1 was reserved/ignored */
	__u8   Buffer[1];	/* variable length GSS security buffer */
} __packed;

/* Flags */
#define SMB2_SESSION_REQ_FLAG_BINDING		0x01
#define SMB2_SESSION_REQ_FLAG_ENCRYPT_DATA	0x04

struct smb2_sess_setup_req {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 25 */
	__u8   Flags;
	__u8   SecurityMode;
	__le32 Capabilities;
	__le32 Channel;
	__le16 SecurityBufferOffset;
	__le16 SecurityBufferLength;
	__u64 PreviousSessionId;
	__u8   Buffer[1];	/* variable length GSS security buffer */
} __packed;

/* Currently defined SessionFlags */
#define SMB2_SESSION_FLAG_IS_GUEST	0x0001
#define SMB2_SESSION_FLAG_IS_NULL	0x0002
#define SMB2_SESSION_FLAG_ENCRYPT_DATA	0x0004
struct smb2_sess_setup_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 9 */
	__le16 SessionFlags;
	__le16 SecurityBufferOffset;
	__le16 SecurityBufferLength;
	__u8   Buffer[1];	/* variable length GSS security buffer */
} __packed;

struct smb2_logoff_req {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize;	/* Must be 4 */
	__le16 Reserved;
} __packed;

struct smb2_logoff_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize;	/* Must be 4 */
	__le16 Reserved;
} __packed;

/* Flags/Reserved for SMB3.1.1 */
#define SMB2_TREE_CONNECT_FLAG_CLUSTER_RECONNECT cpu_to_le16(0x0001)
#define SMB2_TREE_CONNECT_FLAG_REDIRECT_TO_OWNER cpu_to_le16(0x0002)
#define SMB2_TREE_CONNECT_FLAG_EXTENSION_PRESENT cpu_to_le16(0x0004)

struct smb2_tree_connect_req {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize;	/* Must be 9 */
	__le16 Reserved; /* Flags in SMB3.1.1 */
	__le16 PathOffset;
	__le16 PathLength;
	__u8   Buffer[1];	/* variable length */
} __packed;

/* See MS-SMB2 section 2.2.9.2 */
/* Context Types */
#define SMB2_RESERVED_TREE_CONNECT_CONTEXT_ID 0x0000
#define SMB2_REMOTED_IDENTITY_TREE_CONNECT_CONTEXT_ID cpu_to_le16(0x0001)

struct tree_connect_contexts {
	__le16 ContextType;
	__le16 DataLength;
	__le32 Reserved;
	__u8   Data[0];
} __packed;

/* Remoted identity tree connect context structures - see MS-SMB2 2.2.9.2.1 */
struct smb3_blob_data {
	__le16 BlobSize;
	__u8   BlobData[0];
} __packed;

/* Valid values for Attr */
#define SE_GROUP_MANDATORY		0x00000001
#define SE_GROUP_ENABLED_BY_DEFAULT	0x00000002
#define SE_GROUP_ENABLED		0x00000004
#define SE_GROUP_OWNER			0x00000008
#define SE_GROUP_USE_FOR_DENY_ONLY	0x00000010
#define SE_GROUP_INTEGRITY		0x00000020
#define SE_GROUP_INTEGRITY_ENABLED	0x00000040
#define SE_GROUP_RESOURCE		0x20000000
#define SE_GROUP_LOGON_ID		0xC0000000

/* struct sid_attr_data is SidData array in BlobData format then le32 Attr */

struct sid_array_data {
	__le16 SidAttrCount;
	/* SidAttrList - array of sid_attr_data structs */
} __packed;

struct luid_attr_data {

} __packed;

/*
 * struct privilege_data is the same as BLOB_DATA - see MS-SMB2 2.2.9.2.1.5
 * but with size of LUID_ATTR_DATA struct and BlobData set to LUID_ATTR DATA
 */

struct privilege_array_data {
	__le16 PrivilegeCount;
	/* array of privilege_data structs */
} __packed;

struct remoted_identity_tcon_context {
	__le16 TicketType; /* must be 0x0001 */
	__le16 TicketSize; /* total size of this struct */
	__le16 User; /* offset to SID_ATTR_DATA struct with user info */
	__le16 UserName; /* offset to null terminated Unicode username string */
	__le16 Domain; /* offset to null terminated Unicode domain name */
	__le16 Groups; /* offset to SID_ARRAY_DATA struct with group info */
	__le16 RestrictedGroups; /* similar to above */
	__le16 Privileges; /* offset to PRIVILEGE_ARRAY_DATA struct */
	__le16 PrimaryGroup; /* offset to SID_ARRAY_DATA struct */
	__le16 Owner; /* offset to BLOB_DATA struct */
	__le16 DefaultDacl; /* offset to BLOB_DATA struct */
	__le16 DeviceGroups; /* offset to SID_ARRAY_DATA struct */
	__le16 UserClaims; /* offset to BLOB_DATA struct */
	__le16 DeviceClaims; /* offset to BLOB_DATA struct */
	__u8   TicketInfo[0]; /* variable length buf - remoted identity data */
} __packed;

struct smb2_tree_connect_req_extension {
	__le32 TreeConnectContextOffset;
	__le16 TreeConnectContextCount;
	__u8  Reserved[10];
	__u8  PathName[0]; /* variable sized array */
	/* followed by array of TreeConnectContexts */
} __packed;

struct smb2_tree_connect_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize;	/* Must be 16 */
	__u8   ShareType;  /* see below */
	__u8   Reserved;
	__le32 ShareFlags; /* see below */
	__le32 Capabilities; /* see below */
	__le32 MaximalAccess;
} __packed;

/* Possible ShareType values */
#define SMB2_SHARE_TYPE_DISK	0x01
#define SMB2_SHARE_TYPE_PIPE	0x02
#define	SMB2_SHARE_TYPE_PRINT	0x03

/*
 * Possible ShareFlags - exactly one and only one of the first 4 caching flags
 * must be set (any of the remaining, SHI1005, flags may be set individually
 * or in combination.
 */
#define SMB2_SHAREFLAG_MANUAL_CACHING			0x00000000
#define SMB2_SHAREFLAG_AUTO_CACHING			0x00000010
#define SMB2_SHAREFLAG_VDO_CACHING			0x00000020
#define SMB2_SHAREFLAG_NO_CACHING			0x00000030
#define SHI1005_FLAGS_DFS				0x00000001
#define SHI1005_FLAGS_DFS_ROOT				0x00000002
#define SHI1005_FLAGS_RESTRICT_EXCLUSIVE_OPENS		0x00000100
#define SHI1005_FLAGS_FORCE_SHARED_DELETE		0x00000200
#define SHI1005_FLAGS_ALLOW_NAMESPACE_CACHING		0x00000400
#define SHI1005_FLAGS_ACCESS_BASED_DIRECTORY_ENUM	0x00000800
#define SHI1005_FLAGS_FORCE_LEVELII_OPLOCK		0x00001000
#define SHI1005_FLAGS_ENABLE_HASH_V1			0x00002000
#define SHI1005_FLAGS_ENABLE_HASH_V2			0x00004000
#define SHI1005_FLAGS_ENCRYPT_DATA			0x00008000
#define SMB2_SHAREFLAG_IDENTITY_REMOTING		0x00040000 /* 3.1.1 */
#define SHI1005_FLAGS_ALL				0x0004FF33

/* Possible share capabilities */
#define SMB2_SHARE_CAP_DFS	cpu_to_le32(0x00000008) /* all dialects */
#define SMB2_SHARE_CAP_CONTINUOUS_AVAILABILITY cpu_to_le32(0x00000010) /* 3.0 */
#define SMB2_SHARE_CAP_SCALEOUT	cpu_to_le32(0x00000020) /* 3.0 */
#define SMB2_SHARE_CAP_CLUSTER	cpu_to_le32(0x00000040) /* 3.0 */
#define SMB2_SHARE_CAP_ASYMMETRIC cpu_to_le32(0x00000080) /* 3.02 */
#define SMB2_SHARE_CAP_REDIRECT_TO_OWNER cpu_to_le32(0x00000100) /* 3.1.1 */

struct smb2_tree_disconnect_req {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize;	/* Must be 4 */
	__le16 Reserved;
} __packed;

struct smb2_tree_disconnect_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize;	/* Must be 4 */
	__le16 Reserved;
} __packed;

/* File Attrubutes */
#define FILE_ATTRIBUTE_READONLY			0x00000001
#define FILE_ATTRIBUTE_HIDDEN			0x00000002
#define FILE_ATTRIBUTE_SYSTEM			0x00000004
#define FILE_ATTRIBUTE_DIRECTORY		0x00000010
#define FILE_ATTRIBUTE_ARCHIVE			0x00000020
#define FILE_ATTRIBUTE_NORMAL			0x00000080
#define FILE_ATTRIBUTE_TEMPORARY		0x00000100
#define FILE_ATTRIBUTE_SPARSE_FILE		0x00000200
#define FILE_ATTRIBUTE_REPARSE_POINT		0x00000400
#define FILE_ATTRIBUTE_COMPRESSED		0x00000800
#define FILE_ATTRIBUTE_OFFLINE			0x00001000
#define FILE_ATTRIBUTE_NOT_CONTENT_INDEXED	0x00002000
#define FILE_ATTRIBUTE_ENCRYPTED		0x00004000
#define FILE_ATTRIBUTE_INTEGRITY_STREAM		0x00008000
#define FILE_ATTRIBUTE_NO_SCRUB_DATA		0x00020000

/* Oplock levels */
#define SMB2_OPLOCK_LEVEL_NONE		0x00
#define SMB2_OPLOCK_LEVEL_II		0x01
#define SMB2_OPLOCK_LEVEL_EXCLUSIVE	0x08
#define SMB2_OPLOCK_LEVEL_BATCH		0x09
#define SMB2_OPLOCK_LEVEL_LEASE		0xFF
/* Non-spec internal type */
#define SMB2_OPLOCK_LEVEL_NOCHANGE	0x99

/* Desired Access Flags */
#define FILE_READ_DATA_LE		cpu_to_le32(0x00000001)
#define FILE_WRITE_DATA_LE		cpu_to_le32(0x00000002)
#define FILE_APPEND_DATA_LE		cpu_to_le32(0x00000004)
#define FILE_READ_EA_LE			cpu_to_le32(0x00000008)
#define FILE_WRITE_EA_LE		cpu_to_le32(0x00000010)
#define FILE_EXECUTE_LE			cpu_to_le32(0x00000020)
#define FILE_READ_ATTRIBUTES_LE		cpu_to_le32(0x00000080)
#define FILE_WRITE_ATTRIBUTES_LE	cpu_to_le32(0x00000100)
#define FILE_DELETE_LE			cpu_to_le32(0x00010000)
#define FILE_READ_CONTROL_LE		cpu_to_le32(0x00020000)
#define FILE_WRITE_DAC_LE		cpu_to_le32(0x00040000)
#define FILE_WRITE_OWNER_LE		cpu_to_le32(0x00080000)
#define FILE_SYNCHRONIZE_LE		cpu_to_le32(0x00100000)
#define FILE_ACCESS_SYSTEM_SECURITY_LE	cpu_to_le32(0x01000000)
#define FILE_MAXIMAL_ACCESS_LE		cpu_to_le32(0x02000000)
#define FILE_GENERIC_ALL_LE		cpu_to_le32(0x10000000)
#define FILE_GENERIC_EXECUTE_LE		cpu_to_le32(0x20000000)
#define FILE_GENERIC_WRITE_LE		cpu_to_le32(0x40000000)
#define FILE_GENERIC_READ_LE		cpu_to_le32(0x80000000)

/* ShareAccess Flags */
#define FILE_SHARE_READ_LE		cpu_to_le32(0x00000001)
#define FILE_SHARE_WRITE_LE		cpu_to_le32(0x00000002)
#define FILE_SHARE_DELETE_LE		cpu_to_le32(0x00000004)
#define FILE_SHARE_ALL_LE		cpu_to_le32(0x00000007)

/* CreateDisposition Flags */
#define FILE_SUPERSEDE_LE		cpu_to_le32(0x00000000)
#define FILE_OPEN_LE			cpu_to_le32(0x00000001)
#define FILE_CREATE_LE			cpu_to_le32(0x00000002)
#define	FILE_OPEN_IF_LE			cpu_to_le32(0x00000003)
#define FILE_OVERWRITE_LE		cpu_to_le32(0x00000004)
#define FILE_OVERWRITE_IF_LE		cpu_to_le32(0x00000005)

/* CreateOptions Flags */
#define FILE_DIRECTORY_FILE_LE		cpu_to_le32(0x00000001)
/* same as #define CREATE_NOT_FILE_LE	cpu_to_le32(0x00000001) */
#define FILE_WRITE_THROUGH_LE		cpu_to_le32(0x00000002)
#define FILE_SEQUENTIAL_ONLY_LE		cpu_to_le32(0x00000004)
#define FILE_NO_INTERMEDIATE_BUFFERRING_LE cpu_to_le32(0x00000008)
#define FILE_SYNCHRONOUS_IO_ALERT_LE	cpu_to_le32(0x00000010)
#define FILE_SYNCHRONOUS_IO_NON_ALERT_LE	cpu_to_le32(0x00000020)
#define FILE_NON_DIRECTORY_FILE_LE	cpu_to_le32(0x00000040)
#define FILE_COMPLETE_IF_OPLOCKED_LE	cpu_to_le32(0x00000100)
#define FILE_NO_EA_KNOWLEDGE_LE		cpu_to_le32(0x00000200)
#define FILE_RANDOM_ACCESS_LE		cpu_to_le32(0x00000800)
#define FILE_DELETE_ON_CLOSE_LE		cpu_to_le32(0x00001000)
#define FILE_OPEN_BY_FILE_ID_LE		cpu_to_le32(0x00002000)
#define FILE_OPEN_FOR_BACKUP_INTENT_LE	cpu_to_le32(0x00004000)
#define FILE_NO_COMPRESSION_LE		cpu_to_le32(0x00008000)
#define FILE_RESERVE_OPFILTER_LE	cpu_to_le32(0x00100000)
#define FILE_OPEN_REPARSE_POINT_LE	cpu_to_le32(0x00200000)
#define FILE_OPEN_NO_RECALL_LE		cpu_to_le32(0x00400000)
#define FILE_OPEN_FOR_FREE_SPACE_QUERY_LE cpu_to_le32(0x00800000)

#define FILE_READ_RIGHTS_LE (FILE_READ_DATA_LE | FILE_READ_EA_LE \
			| FILE_READ_ATTRIBUTES_LE)
#define FILE_WRITE_RIGHTS_LE (FILE_WRITE_DATA_LE | FILE_APPEND_DATA_LE \
			| FILE_WRITE_EA_LE | FILE_WRITE_ATTRIBUTES_LE)
#define FILE_EXEC_RIGHTS_LE (FILE_EXECUTE_LE)

/* Impersonation Levels */
#define IL_ANONYMOUS		cpu_to_le32(0x00000000)
#define IL_IDENTIFICATION	cpu_to_le32(0x00000001)
#define IL_IMPERSONATION	cpu_to_le32(0x00000002)
#define IL_DELEGATE		cpu_to_le32(0x00000003)

/* Create Context Values */
#define SMB2_CREATE_EA_BUFFER			"ExtA" /* extended attributes */
#define SMB2_CREATE_SD_BUFFER			"SecD" /* security descriptor */
#define SMB2_CREATE_DURABLE_HANDLE_REQUEST	"DHnQ"
#define SMB2_CREATE_DURABLE_HANDLE_RECONNECT	"DHnC"
#define SMB2_CREATE_ALLOCATION_SIZE		"AISi"
#define SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST "MxAc"
#define SMB2_CREATE_TIMEWARP_REQUEST		"TWrp"
#define SMB2_CREATE_QUERY_ON_DISK_ID		"QFid"
#define SMB2_CREATE_REQUEST_LEASE		"RqLs"
#define SMB2_CREATE_DURABLE_HANDLE_REQUEST_V2	"DH2Q"
#define SMB2_CREATE_DURABLE_HANDLE_RECONNECT_V2	"DH2C"
#define SMB2_CREATE_APP_INSTANCE_ID	0x45BCA66AEFA7F74A9008FA462E144D74
#define SMB2_CREATE_APP_INSTANCE_VERSION 0xB982D0B73B56074FA07B524A8116A010
#define SVHDX_OPEN_DEVICE_CONTEX	0x9CCBCF9E04C1E643980E158DA1F6EC83
#define SMB2_CREATE_TAG_POSIX		0x93AD25509CB411E7B42383DE968BCD7C

/* Flag (SMB3 open response) values */
#define SMB2_CREATE_FLAG_REPARSEPOINT 0x01

/*
 * Maximum number of iovs we need for an open/create request.
 * [0] : struct smb2_create_req
 * [1] : path
 * [2] : lease context
 * [3] : durable context
 * [4] : posix context
 * [5] : time warp context
 * [6] : query id context
 * [7] : compound padding
 */
#define SMB2_CREATE_IOV_SIZE 8

struct smb2_create_req {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize;	/* Must be 57 */
	__u8   SecurityFlags;
	__u8   RequestedOplockLevel;
	__le32 ImpersonationLevel;
	__le64 SmbCreateFlags;
	__le64 Reserved;
	__le32 DesiredAccess;
	__le32 FileAttributes;
	__le32 ShareAccess;
	__le32 CreateDisposition;
	__le32 CreateOptions;
	__le16 NameOffset;
	__le16 NameLength;
	__le32 CreateContextsOffset;
	__le32 CreateContextsLength;
	__u8   Buffer[0];
} __packed;

/*
 * Maximum size of a SMB2_CREATE response is 64 (smb2 header) +
 * 88 (fixed part of create response) + 520 (path) + 208 (contexts) +
 * 2 bytes of padding.
 */
#define MAX_SMB2_CREATE_RESPONSE_SIZE 880

struct smb2_create_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize;	/* Must be 89 */
	__u8   OplockLevel;
	__u8   Flag;  /* 0x01 if reparse point */
	__le32 CreateAction;
	__le64 CreationTime;
	__le64 LastAccessTime;
	__le64 LastWriteTime;
	__le64 ChangeTime;
	__le64 AllocationSize;
	__le64 EndofFile;
	__le32 FileAttributes;
	__le32 Reserved2;
	__u64  PersistentFileId; /* opaque endianness */
	__u64  VolatileFileId; /* opaque endianness */
	__le32 CreateContextsOffset;
	__le32 CreateContextsLength;
	__u8   Buffer[1];
} __packed;

struct create_context {
	__le32 Next;
	__le16 NameOffset;
	__le16 NameLength;
	__le16 Reserved;
	__le16 DataOffset;
	__le32 DataLength;
	__u8 Buffer[0];
} __packed;

#define SMB2_LEASE_READ_CACHING_HE	0x01
#define SMB2_LEASE_HANDLE_CACHING_HE	0x02
#define SMB2_LEASE_WRITE_CACHING_HE	0x04

#define SMB2_LEASE_NONE			cpu_to_le32(0x00)
#define SMB2_LEASE_READ_CACHING		cpu_to_le32(0x01)
#define SMB2_LEASE_HANDLE_CACHING	cpu_to_le32(0x02)
#define SMB2_LEASE_WRITE_CACHING	cpu_to_le32(0x04)

#define SMB2_LEASE_FLAG_BREAK_IN_PROGRESS cpu_to_le32(0x02)
#define SMB2_LEASE_FLAG_PARENT_LEASE_KEY_SET cpu_to_le32(0x00000004)

#define SMB2_LEASE_KEY_SIZE 16

struct lease_context {
	u8 LeaseKey[SMB2_LEASE_KEY_SIZE];
	__le32 LeaseState;
	__le32 LeaseFlags;
	__le64 LeaseDuration;
} __packed;

struct lease_context_v2 {
	u8 LeaseKey[SMB2_LEASE_KEY_SIZE];
	__le32 LeaseState;
	__le32 LeaseFlags;
	__le64 LeaseDuration;
	__le64 ParentLeaseKeyLow;
	__le64 ParentLeaseKeyHigh;
	__le16 Epoch;
	__le16 Reserved;
} __packed;

struct create_lease {
	struct create_context ccontext;
	__u8   Name[8];
	struct lease_context lcontext;
} __packed;

struct create_lease_v2 {
	struct create_context ccontext;
	__u8   Name[8];
	struct lease_context_v2 lcontext;
	__u8   Pad[4];
} __packed;

struct create_durable {
	struct create_context ccontext;
	__u8   Name[8];
	union {
		__u8  Reserved[16];
		struct {
			__u64 PersistentFileId;
			__u64 VolatileFileId;
		} Fid;
	} Data;
} __packed;

struct create_posix {
	struct create_context ccontext;
	__u8	Name[16];
	__le32  Mode;
	__u32	Reserved;
} __packed;

/* See MS-SMB2 2.2.13.2.11 */
/* Flags */
#define SMB2_DHANDLE_FLAG_PERSISTENT	0x00000002
struct durable_context_v2 {
	__le32 Timeout;
	__le32 Flags;
	__u64 Reserved;
	__u8 CreateGuid[16];
} __packed;

struct create_durable_v2 {
	struct create_context ccontext;
	__u8   Name[8];
	struct durable_context_v2 dcontext;
} __packed;

/* See MS-SMB2 2.2.13.2.12 */
struct durable_reconnect_context_v2 {
	struct {
		__u64 PersistentFileId;
		__u64 VolatileFileId;
	} Fid;
	__u8 CreateGuid[16];
	__le32 Flags; /* see above DHANDLE_FLAG_PERSISTENT */
} __packed;

/* See MS-SMB2 2.2.14.2.9 */
struct create_on_disk_id {
	struct create_context ccontext;
	__u8   Name[8];
	__le64 DiskFileId;
	__le64 VolumeId;
	__u32  Reserved[4];
} __packed;

/* See MS-SMB2 2.2.14.2.12 */
struct durable_reconnect_context_v2_rsp {
	__le32 Timeout;
	__le32 Flags; /* see above DHANDLE_FLAG_PERSISTENT */
} __packed;

struct create_durable_handle_reconnect_v2 {
	struct create_context ccontext;
	__u8   Name[8];
	struct durable_reconnect_context_v2 dcontext;
	__u8   Pad[4];
} __packed;

/* See MS-SMB2 2.2.13.2.5 */
struct crt_twarp_ctxt {
	struct create_context ccontext;
	__u8	Name[8];
	__le64	Timestamp;

} __packed;

/* See MS-SMB2 2.2.13.2.9 */
struct crt_query_id_ctxt {
	struct create_context ccontext;
	__u8	Name[8];
} __packed;

struct crt_sd_ctxt {
	struct create_context ccontext;
	__u8	Name[8];
	struct smb3_sd sd;
	struct smb3_acl acl;
	/* Followed by at least 4 ACEs */
} __packed;


#define COPY_CHUNK_RES_KEY_SIZE	24
struct resume_key_req {
	char ResumeKey[COPY_CHUNK_RES_KEY_SIZE];
	__le32	ContextLength;	/* MBZ */
	char	Context[0];	/* ignored, Windows sets to 4 bytes of zero */
} __packed;

/* this goes in the ioctl buffer when doing a copychunk request */
struct copychunk_ioctl {
	char SourceKey[COPY_CHUNK_RES_KEY_SIZE];
	__le32 ChunkCount; /* we are only sending 1 */
	__le32 Reserved;
	/* array will only be one chunk long for us */
	__le64 SourceOffset;
	__le64 TargetOffset;
	__le32 Length; /* how many bytes to copy */
	__u32 Reserved2;
} __packed;

/* this goes in the ioctl buffer when doing FSCTL_SET_ZERO_DATA */
struct file_zero_data_information {
	__le64	FileOffset;
	__le64	BeyondFinalZero;
} __packed;

struct copychunk_ioctl_rsp {
	__le32 ChunksWritten;
	__le32 ChunkBytesWritten;
	__le32 TotalBytesWritten;
} __packed;

struct fsctl_set_integrity_information_req {
	__le16	ChecksumAlgorithm;
	__le16	Reserved;
	__le32	Flags;
} __packed;

struct fsctl_get_integrity_information_rsp {
	__le16	ChecksumAlgorithm;
	__le16	Reserved;
	__le32	Flags;
	__le32	ChecksumChunkSizeInBytes;
	__le32	ClusterSizeInBytes;
} __packed;

struct file_allocated_range_buffer {
	__le64	file_offset;
	__le64	length;
} __packed;

/* Integrity ChecksumAlgorithm choices for above */
#define	CHECKSUM_TYPE_NONE	0x0000
#define	CHECKSUM_TYPE_CRC64	0x0002
#define CHECKSUM_TYPE_UNCHANGED	0xFFFF	/* set only */

/* Integrity flags for above */
#define FSCTL_INTEGRITY_FLAG_CHECKSUM_ENFORCEMENT_OFF	0x00000001

/* Reparse structures - see MS-FSCC 2.1.2 */

/* struct fsctl_reparse_info_req is empty, only response structs (see below) */

struct reparse_data_buffer {
	__le32	ReparseTag;
	__le16	ReparseDataLength;
	__u16	Reserved;
	__u8	DataBuffer[0]; /* Variable Length */
} __packed;

struct reparse_guid_data_buffer {
	__le32	ReparseTag;
	__le16	ReparseDataLength;
	__u16	Reserved;
	__u8	ReparseGuid[16];
	__u8	DataBuffer[0]; /* Variable Length */
} __packed;

struct reparse_mount_point_data_buffer {
	__le32	ReparseTag;
	__le16	ReparseDataLength;
	__u16	Reserved;
	__le16	SubstituteNameOffset;
	__le16	SubstituteNameLength;
	__le16	PrintNameOffset;
	__le16	PrintNameLength;
	__u8	PathBuffer[0]; /* Variable Length */
} __packed;

#define SYMLINK_FLAG_RELATIVE 0x00000001

struct reparse_symlink_data_buffer {
	__le32	ReparseTag;
	__le16	ReparseDataLength;
	__u16	Reserved;
	__le16	SubstituteNameOffset;
	__le16	SubstituteNameLength;
	__le16	PrintNameOffset;
	__le16	PrintNameLength;
	__le32	Flags;
	__u8	PathBuffer[0]; /* Variable Length */
} __packed;

/* See MS-FSCC 2.1.2.6 and cifspdu.h for struct reparse_posix_data */


/* See MS-DFSC 2.2.2 */
struct fsctl_get_dfs_referral_req {
	__le16 MaxReferralLevel;
	__u8 RequestFileName[];
} __packed;

/* DFS response is struct get_dfs_refer_rsp */

/* See MS-SMB2 2.2.31.3 */
struct network_resiliency_req {
	__le32 Timeout;
	__le32 Reserved;
} __packed;
/* There is no buffer for the response ie no struct network_resiliency_rsp */


struct validate_negotiate_info_req {
	__le32 Capabilities;
	__u8   Guid[SMB2_CLIENT_GUID_SIZE];
	__le16 SecurityMode;
	__le16 DialectCount;
	__le16 Dialects[4]; /* BB expand this if autonegotiate > 4 dialects */
} __packed;

struct validate_negotiate_info_rsp {
	__le32 Capabilities;
	__u8   Guid[SMB2_CLIENT_GUID_SIZE];
	__le16 SecurityMode;
	__le16 Dialect; /* Dialect in use for the connection */
} __packed;

#define RSS_CAPABLE	cpu_to_le32(0x00000001)
#define RDMA_CAPABLE	cpu_to_le32(0x00000002)

#define INTERNETWORK	cpu_to_le16(0x0002)
#define INTERNETWORKV6	cpu_to_le16(0x0017)

struct network_interface_info_ioctl_rsp {
	__le32 Next; /* next interface. zero if this is last one */
	__le32 IfIndex;
	__le32 Capability; /* RSS or RDMA Capable */
	__le32 Reserved;
	__le64 LinkSpeed;
	__le16 Family;
	__u8 Buffer[126];
} __packed;

struct iface_info_ipv4 {
	__be16 Port;
	__be32 IPv4Address;
	__be64 Reserved;
} __packed;

struct iface_info_ipv6 {
	__be16 Port;
	__be32 FlowInfo;
	__u8   IPv6Address[16];
	__be32 ScopeId;
} __packed;

#define NO_FILE_ID 0xFFFFFFFFFFFFFFFFULL /* general ioctls to srv not to file */

struct compress_ioctl {
	__le16 CompressionState; /* See cifspdu.h for possible flag values */
} __packed;

struct duplicate_extents_to_file {
	__u64 PersistentFileHandle; /* source file handle, opaque endianness */
	__u64 VolatileFileHandle;
	__le64 SourceFileOffset;
	__le64 TargetFileOffset;
	__le64 ByteCount;  /* Bytes to be copied */
} __packed;

/*
 * Maximum number of iovs we need for an ioctl request.
 * [0] : struct smb2_ioctl_req
 * [1] : in_data
 */
#define SMB2_IOCTL_IOV_SIZE 2

struct smb2_ioctl_req {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize;	/* Must be 57 */
	__u16 Reserved;
	__le32 CtlCode;
	__u64  PersistentFileId; /* opaque endianness */
	__u64  VolatileFileId; /* opaque endianness */
	__le32 InputOffset;
	__le32 InputCount;
	__le32 MaxInputResponse;
	__le32 OutputOffset;
	__le32 OutputCount;
	__le32 MaxOutputResponse;
	__le32 Flags;
	__u32  Reserved2;
	__u8   Buffer[0];
} __packed;

struct smb2_ioctl_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize;	/* Must be 57 */
	__u16 Reserved;
	__le32 CtlCode;
	__u64  PersistentFileId; /* opaque endianness */
	__u64  VolatileFileId; /* opaque endianness */
	__le32 InputOffset;
	__le32 InputCount;
	__le32 OutputOffset;
	__le32 OutputCount;
	__le32 Flags;
	__u32  Reserved2;
	/* char * buffer[] */
} __packed;

/* Currently defined values for close flags */
#define SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB	cpu_to_le16(0x0001)
struct smb2_close_req {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize;	/* Must be 24 */
	__le16 Flags;
	__le32 Reserved;
	__u64  PersistentFileId; /* opaque endianness */
	__u64  VolatileFileId; /* opaque endianness */
} __packed;

/*
 * Maximum size of a SMB2_CLOSE response is 64 (smb2 header) + 60 (data)
 */
#define MAX_SMB2_CLOSE_RESPONSE_SIZE 124

struct smb2_close_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* 60 */
	__le16 Flags;
	__le32 Reserved;
	__le64 CreationTime;
	__le64 LastAccessTime;
	__le64 LastWriteTime;
	__le64 ChangeTime;
	__le64 AllocationSize;	/* Beginning of FILE_STANDARD_INFO equivalent */
	__le64 EndOfFile;
	__le32 Attributes;
} __packed;

struct smb2_flush_req {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize;	/* Must be 24 */
	__le16 Reserved1;
	__le32 Reserved2;
	__u64  PersistentFileId; /* opaque endianness */
	__u64  VolatileFileId; /* opaque endianness */
} __packed;

struct smb2_flush_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize;
	__le16 Reserved;
} __packed;

/* For read request Flags field below, following flag is defined for SMB3.02 */
#define SMB2_READFLAG_READ_UNBUFFERED	0x01
#define SMB2_READFLAG_REQUEST_COMPRESSED 0x02 /* See MS-SMB2 2.2.19 */

/* Channel field for read and write: exactly one of following flags can be set*/
#define SMB2_CHANNEL_NONE	cpu_to_le32(0x00000000)
#define SMB2_CHANNEL_RDMA_V1	cpu_to_le32(0x00000001) /* SMB3 or later */
#define SMB2_CHANNEL_RDMA_V1_INVALIDATE cpu_to_le32(0x00000002) /* >= SMB3.02 */

/* SMB2 read request without RFC1001 length at the beginning */
struct smb2_read_plain_req {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 49 */
	__u8   Padding; /* offset from start of SMB2 header to place read */
	__u8   Flags; /* MBZ unless SMB3.02 or later */
	__le32 Length;
	__le64 Offset;
	__u64  PersistentFileId; /* opaque endianness */
	__u64  VolatileFileId; /* opaque endianness */
	__le32 MinimumCount;
	__le32 Channel; /* MBZ except for SMB3 or later */
	__le32 RemainingBytes;
	__le16 ReadChannelInfoOffset;
	__le16 ReadChannelInfoLength;
	__u8   Buffer[1];
} __packed;

struct smb2_read_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 17 */
	__u8   DataOffset;
	__u8   Reserved;
	__le32 DataLength;
	__le32 DataRemaining;
	__u32  Reserved2;
	__u8   Buffer[1];
} __packed;

/* For write request Flags field below the following flags are defined: */
#define SMB2_WRITEFLAG_WRITE_THROUGH	0x00000001	/* SMB2.1 or later */
#define SMB2_WRITEFLAG_WRITE_UNBUFFERED	0x00000002	/* SMB3.02 or later */

struct smb2_write_req {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 49 */
	__le16 DataOffset; /* offset from start of SMB2 header to write data */
	__le32 Length;
	__le64 Offset;
	__u64  PersistentFileId; /* opaque endianness */
	__u64  VolatileFileId; /* opaque endianness */
	__le32 Channel; /* Reserved MBZ */
	__le32 RemainingBytes;
	__le16 WriteChannelInfoOffset;
	__le16 WriteChannelInfoLength;
	__le32 Flags;
	__u8   Buffer[1];
} __packed;

struct smb2_write_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 17 */
	__u8   DataOffset;
	__u8   Reserved;
	__le32 DataLength;
	__le32 DataRemaining;
	__u32  Reserved2;
	__u8   Buffer[1];
} __packed;

/* notify flags */
#define SMB2_WATCH_TREE			0x0001

/* notify completion filter flags. See MS-FSCC 2.6 and MS-SMB2 2.2.35 */
#define FILE_NOTIFY_CHANGE_FILE_NAME		0x00000001
#define FILE_NOTIFY_CHANGE_DIR_NAME		0x00000002
#define FILE_NOTIFY_CHANGE_ATTRIBUTES		0x00000004
#define FILE_NOTIFY_CHANGE_SIZE			0x00000008
#define FILE_NOTIFY_CHANGE_LAST_WRITE		0x00000010
#define FILE_NOTIFY_CHANGE_LAST_ACCESS		0x00000020
#define FILE_NOTIFY_CHANGE_CREATION		0x00000040
#define FILE_NOTIFY_CHANGE_EA			0x00000080
#define FILE_NOTIFY_CHANGE_SECURITY		0x00000100
#define FILE_NOTIFY_CHANGE_STREAM_NAME		0x00000200
#define FILE_NOTIFY_CHANGE_STREAM_SIZE		0x00000400
#define FILE_NOTIFY_CHANGE_STREAM_WRITE		0x00000800

struct smb2_change_notify_req {
	struct smb2_sync_hdr sync_hdr;
	__le16	StructureSize;
	__le16	Flags;
	__le32	OutputBufferLength;
	__u64	PersistentFileId; /* opaque endianness */
	__u64	VolatileFileId; /* opaque endianness */
	__le32	CompletionFilter;
	__u32	Reserved;
} __packed;

struct smb2_change_notify_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16	StructureSize;  /* Must be 9 */
	__le16	OutputBufferOffset;
	__le32	OutputBufferLength;
	__u8	Buffer[1]; /* array of file notify structs */
} __packed;

#define SMB2_LOCKFLAG_SHARED_LOCK	0x0001
#define SMB2_LOCKFLAG_EXCLUSIVE_LOCK	0x0002
#define SMB2_LOCKFLAG_UNLOCK		0x0004
#define SMB2_LOCKFLAG_FAIL_IMMEDIATELY	0x0010

struct smb2_lock_element {
	__le64 Offset;
	__le64 Length;
	__le32 Flags;
	__le32 Reserved;
} __packed;

struct smb2_lock_req {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 48 */
	__le16 LockCount;
	__le32 Reserved;
	__u64  PersistentFileId; /* opaque endianness */
	__u64  VolatileFileId; /* opaque endianness */
	/* Followed by at least one */
	struct smb2_lock_element locks[1];
} __packed;

struct smb2_lock_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 4 */
	__le16 Reserved;
} __packed;

struct smb2_echo_req {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize;	/* Must be 4 */
	__u16  Reserved;
} __packed;

struct smb2_echo_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize;	/* Must be 4 */
	__u16  Reserved;
} __packed;

/* search (query_directory) Flags field */
#define SMB2_RESTART_SCANS		0x01
#define SMB2_RETURN_SINGLE_ENTRY	0x02
#define SMB2_INDEX_SPECIFIED		0x04
#define SMB2_REOPEN			0x10

struct smb2_query_directory_req {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 33 */
	__u8   FileInformationClass;
	__u8   Flags;
	__le32 FileIndex;
	__u64  PersistentFileId; /* opaque endianness */
	__u64  VolatileFileId; /* opaque endianness */
	__le16 FileNameOffset;
	__le16 FileNameLength;
	__le32 OutputBufferLength;
	__u8   Buffer[1];
} __packed;

struct smb2_query_directory_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 9 */
	__le16 OutputBufferOffset;
	__le32 OutputBufferLength;
	__u8   Buffer[1];
} __packed;

/* Possible InfoType values */
#define SMB2_O_INFO_FILE	0x01
#define SMB2_O_INFO_FILESYSTEM	0x02
#define SMB2_O_INFO_SECURITY	0x03
#define SMB2_O_INFO_QUOTA	0x04

/* Security info type additionalinfo flags. See MS-SMB2 (2.2.37) or MS-DTYP */
#define OWNER_SECINFO   0x00000001
#define GROUP_SECINFO   0x00000002
#define DACL_SECINFO   0x00000004
#define SACL_SECINFO   0x00000008
#define LABEL_SECINFO   0x00000010
#define ATTRIBUTE_SECINFO   0x00000020
#define SCOPE_SECINFO   0x00000040
#define BACKUP_SECINFO   0x00010000
#define UNPROTECTED_SACL_SECINFO   0x10000000
#define UNPROTECTED_DACL_SECINFO   0x20000000
#define PROTECTED_SACL_SECINFO   0x40000000
#define PROTECTED_DACL_SECINFO   0x80000000

/* Flags used for FileFullEAinfo */
#define SL_RESTART_SCAN		0x00000001
#define SL_RETURN_SINGLE_ENTRY	0x00000002
#define SL_INDEX_SPECIFIED	0x00000004

struct smb2_query_info_req {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 41 */
	__u8   InfoType;
	__u8   FileInfoClass;
	__le32 OutputBufferLength;
	__le16 InputBufferOffset;
	__u16  Reserved;
	__le32 InputBufferLength;
	__le32 AdditionalInformation;
	__le32 Flags;
	__u64  PersistentFileId; /* opaque endianness */
	__u64  VolatileFileId; /* opaque endianness */
	__u8   Buffer[1];
} __packed;

struct smb2_query_info_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 9 */
	__le16 OutputBufferOffset;
	__le32 OutputBufferLength;
	__u8   Buffer[1];
} __packed;

/*
 * Maximum number of iovs we need for a set-info request.
 * The largest one is rename/hardlink
 * [0] : struct smb2_set_info_req + smb2_file_[rename|link]_info
 * [1] : path
 * [2] : compound padding
 */
#define SMB2_SET_INFO_IOV_SIZE 3

struct smb2_set_info_req {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 33 */
	__u8   InfoType;
	__u8   FileInfoClass;
	__le32 BufferLength;
	__le16 BufferOffset;
	__u16  Reserved;
	__le32 AdditionalInformation;
	__u64  PersistentFileId; /* opaque endianness */
	__u64  VolatileFileId; /* opaque endianness */
	__u8   Buffer[1];
} __packed;

struct smb2_set_info_rsp {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 2 */
} __packed;

struct smb2_oplock_break {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 24 */
	__u8   OplockLevel;
	__u8   Reserved;
	__le32 Reserved2;
	__u64  PersistentFid;
	__u64  VolatileFid;
} __packed;

#define SMB2_NOTIFY_BREAK_LEASE_FLAG_ACK_REQUIRED cpu_to_le32(0x01)

struct smb2_lease_break {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 44 */
	__le16 Epoch;
	__le32 Flags;
	__u8   LeaseKey[16];
	__le32 CurrentLeaseState;
	__le32 NewLeaseState;
	__le32 BreakReason;
	__le32 AccessMaskHint;
	__le32 ShareMaskHint;
} __packed;

struct smb2_lease_ack {
	struct smb2_sync_hdr sync_hdr;
	__le16 StructureSize; /* Must be 36 */
	__le16 Reserved;
	__le32 Flags;
	__u8   LeaseKey[16];
	__le32 LeaseState;
	__le64 LeaseDuration;
} __packed;

/*
 *	PDU infolevel structure definitions
 *	BB consider moving to a different header
 */

/* File System Information Classes */
#define FS_VOLUME_INFORMATION		1 /* Query */
#define FS_LABEL_INFORMATION		2 /* Local only */
#define FS_SIZE_INFORMATION		3 /* Query */
#define FS_DEVICE_INFORMATION		4 /* Query */
#define FS_ATTRIBUTE_INFORMATION	5 /* Query */
#define FS_CONTROL_INFORMATION		6 /* Query, Set */
#define FS_FULL_SIZE_INFORMATION	7 /* Query */
#define FS_OBJECT_ID_INFORMATION	8 /* Query, Set */
#define FS_DRIVER_PATH_INFORMATION	9 /* Local only */
#define FS_VOLUME_FLAGS_INFORMATION	10 /* Local only */
#define FS_SECTOR_SIZE_INFORMATION	11 /* SMB3 or later. Query */
#define FS_POSIX_INFORMATION		100 /* SMB3.1.1 POSIX. Query */

struct smb2_fs_full_size_info {
	__le64 TotalAllocationUnits;
	__le64 CallerAvailableAllocationUnits;
	__le64 ActualAvailableAllocationUnits;
	__le32 SectorsPerAllocationUnit;
	__le32 BytesPerSector;
} __packed;

#define SSINFO_FLAGS_ALIGNED_DEVICE		0x00000001
#define SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE 0x00000002
#define SSINFO_FLAGS_NO_SEEK_PENALTY		0x00000004
#define SSINFO_FLAGS_TRIM_ENABLED		0x00000008

/* sector size info struct */
struct smb3_fs_ss_info {
	__le32 LogicalBytesPerSector;
	__le32 PhysicalBytesPerSectorForAtomicity;
	__le32 PhysicalBytesPerSectorForPerf;
	__le32 FileSystemEffectivePhysicalBytesPerSectorForAtomicity;
	__le32 Flags;
	__le32 ByteOffsetForSectorAlignment;
	__le32 ByteOffsetForPartitionAlignment;
} __packed;

/* volume info struct - see MS-FSCC 2.5.9 */
#define MAX_VOL_LABEL_LEN	32
struct smb3_fs_vol_info {
	__le64	VolumeCreationTime;
	__u32	VolumeSerialNumber;
	__le32	VolumeLabelLength; /* includes trailing null */
	__u8	SupportsObjects; /* True if eg like NTFS, supports objects */
	__u8	Reserved;
	__u8	VolumeLabel[0]; /* variable len */
} __packed;

/* partial list of QUERY INFO levels */
#define FILE_DIRECTORY_INFORMATION	1
#define FILE_FULL_DIRECTORY_INFORMATION 2
#define FILE_BOTH_DIRECTORY_INFORMATION 3
#define FILE_BASIC_INFORMATION		4
#define FILE_STANDARD_INFORMATION	5
#define FILE_INTERNAL_INFORMATION	6
#define FILE_EA_INFORMATION	        7
#define FILE_ACCESS_INFORMATION		8
#define FILE_NAME_INFORMATION		9
#define FILE_RENAME_INFORMATION		10
#define FILE_LINK_INFORMATION		11
#define FILE_NAMES_INFORMATION		12
#define FILE_DISPOSITION_INFORMATION	13
#define FILE_POSITION_INFORMATION	14
#define FILE_FULL_EA_INFORMATION	15
#define FILE_MODE_INFORMATION		16
#define FILE_ALIGNMENT_INFORMATION	17
#define FILE_ALL_INFORMATION		18
#define FILE_ALLOCATION_INFORMATION	19
#define FILE_END_OF_FILE_INFORMATION	20
#define FILE_ALTERNATE_NAME_INFORMATION 21
#define FILE_STREAM_INFORMATION		22
#define FILE_PIPE_INFORMATION		23
#define FILE_PIPE_LOCAL_INFORMATION	24
#define FILE_PIPE_REMOTE_INFORMATION	25
#define FILE_MAILSLOT_QUERY_INFORMATION 26
#define FILE_MAILSLOT_SET_INFORMATION	27
#define FILE_COMPRESSION_INFORMATION	28
#define FILE_OBJECT_ID_INFORMATION	29
/* Number 30 not defined in documents */
#define FILE_MOVE_CLUSTER_INFORMATION	31
#define FILE_QUOTA_INFORMATION		32
#define FILE_REPARSE_POINT_INFORMATION	33
#define FILE_NETWORK_OPEN_INFORMATION	34
#define FILE_ATTRIBUTE_TAG_INFORMATION	35
#define FILE_TRACKING_INFORMATION	36
#define FILEID_BOTH_DIRECTORY_INFORMATION 37
#define FILEID_FULL_DIRECTORY_INFORMATION 38
#define FILE_VALID_DATA_LENGTH_INFORMATION 39
#define FILE_SHORT_NAME_INFORMATION	40
#define FILE_SFIO_RESERVE_INFORMATION	44
#define FILE_SFIO_VOLUME_INFORMATION	45
#define FILE_HARD_LINK_INFORMATION	46
#define FILE_NORMALIZED_NAME_INFORMATION 48
#define FILEID_GLOBAL_TX_DIRECTORY_INFORMATION 50
#define FILE_STANDARD_LINK_INFORMATION	54

struct smb2_file_internal_info {
	__le64 IndexNumber;
} __packed; /* level 6 Query */

struct smb2_file_rename_info { /* encoding of request for level 10 */
	__u8   ReplaceIfExists; /* 1 = replace existing target with new */
				/* 0 = fail if target already exists */
	__u8   Reserved[7];
	__u64  RootDirectory;  /* MBZ for network operations (why says spec?) */
	__le32 FileNameLength;
	char   FileName[0];     /* New name to be assigned */
} __packed; /* level 10 Set */

struct smb2_file_link_info { /* encoding of request for level 11 */
	__u8   ReplaceIfExists; /* 1 = replace existing link with new */
				/* 0 = fail if link already exists */
	__u8   Reserved[7];
	__u64  RootDirectory;  /* MBZ for network operations (why says spec?) */
	__le32 FileNameLength;
	char   FileName[0];     /* Name to be assigned to new link */
} __packed; /* level 11 Set */

struct smb2_file_full_ea_info { /* encoding of response for level 15 */
	__le32 next_entry_offset;
	__u8   flags;
	__u8   ea_name_length;
	__le16 ea_value_length;
	char   ea_data[0]; /* \0 terminated name plus value */
} __packed; /* level 15 Set */

/*
 * This level 18, although with struct with same name is different from cifs
 * level 0x107. Level 0x107 has an extra u64 between AccessFlags and
 * CurrentByteOffset.
 */
struct smb2_file_all_info { /* data block encoding of response to level 18 */
	__le64 CreationTime;	/* Beginning of FILE_BASIC_INFO equivalent */
	__le64 LastAccessTime;
	__le64 LastWriteTime;
	__le64 ChangeTime;
	__le32 Attributes;
	__u32  Pad1;		/* End of FILE_BASIC_INFO_INFO equivalent */
	__le64 AllocationSize;	/* Beginning of FILE_STANDARD_INFO equivalent */
	__le64 EndOfFile;	/* size ie offset to first free byte in file */
	__le32 NumberOfLinks;	/* hard links */
	__u8   DeletePending;
	__u8   Directory;
	__u16  Pad2;		/* End of FILE_STANDARD_INFO equivalent */
	__le64 IndexNumber;
	__le32 EASize;
	__le32 AccessFlags;
	__le64 CurrentByteOffset;
	__le32 Mode;
	__le32 AlignmentRequirement;
	__le32 FileNameLength;
	char   FileName[1];
} __packed; /* level 18 Query */

struct smb2_file_eof_info { /* encoding of request for level 10 */
	__le64 EndOfFile; /* new end of file value */
} __packed; /* level 20 Set */

struct smb2_file_network_open_info {
	__le64 CreationTime;
	__le64 LastAccessTime;
	__le64 LastWriteTime;
	__le64 ChangeTime;
	__le64 AllocationSize;
	__le64 EndOfFile;
	__le32 Attributes;
	__le32 Reserved;
} __packed; /* level 34 Query also similar returned in close rsp and open rsp */

extern char smb2_padding[7];

#endif				/* _SMB2PDU_H */