/*
   *   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>
  
  /*
   * 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 NUMBER_OF_SMB2_COMMANDS	0x0013
  
  /* BB FIXME - analyze following length BB */
  #define MAX_SMB2_HDR_SIZE 0x78 /* 4 len + 64 hdr + (2*24 wct) + 2 bct + 2 pad */
  
  #define SMB2_PROTO_NUMBER __constant_cpu_to_le32(0x424d53fe)
  
  /*
   * 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 __constant_cpu_to_le16(64)
  
  struct smb2_hdr {
  	__be32 smb2_buf_length;	/* big endian on wire */
  				/* length is only two or three bytes - with
  				 one or two byte type preceding it that MBZ */
  	__u8   ProtocolId[4];	/* 0xFE 'S' 'M' 'B' */
  	__le16 StructureSize;	/* 64 */
  	__le16 CreditCharge;	/* MBZ */
  	__le32 Status;		/* Error from server */
  	__le16 Command;
  	__le16 CreditRequest;  /* CreditResponse */
  	__le32 Flags;
  	__le32 NextCommand;
  	__u64  MessageId;	/* opaque - so can stay little endian */
  	__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_pdu {
  	struct smb2_hdr hdr;
  	__le16 StructureSize2; /* size of wct area (varies, request specific) */
  } __packed;
  
  struct smb2_transform_hdr {
  	__be32 smb2_buf_length;	/* big endian on wire */
  				/* length is only two or three bytes - with
  				 one or two byte type preceding it that MBZ */
  	__u8   ProtocolId[4];	/* 0xFD 'S' 'M' 'B' */
  	__u8   Signature[16];
  	__u8   Nonce[11];
  	__u8   Reserved[5];
  	__le32 OriginalMessageSize;
  	__u16  Reserved1;
  	__le16 EncryptionAlgorithm;
  	__u64  SessionId;
  } __packed;
  
  /* Encryption Algorithms */
  #define SMB2_ENCRYPTION_AES128_CCM	__constant_cpu_to_le16(0x0001)
  
  /*
   *	SMB2 flag definitions
   */
  #define SMB2_FLAGS_SERVER_TO_REDIR	__constant_cpu_to_le32(0x00000001)
  #define SMB2_FLAGS_ASYNC_COMMAND	__constant_cpu_to_le32(0x00000002)
  #define SMB2_FLAGS_RELATED_OPERATIONS	__constant_cpu_to_le32(0x00000004)
  #define SMB2_FLAGS_SIGNED		__constant_cpu_to_le32(0x00000008)
  #define SMB2_FLAGS_DFS_OPERATIONS	__constant_cpu_to_le32(0x10000000)
  
  /*
   *	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 SMB2_ERROR_STRUCTURE_SIZE2 __constant_cpu_to_le16(9)
  
  struct smb2_err_rsp {
  	struct smb2_hdr hdr;
  	__le16 StructureSize;
  	__le16 Reserved; /* MBZ */
  	__le32 ByteCount;  /* even if zero, at least one byte follows */
  	__u8   ErrorData[1];  /* variable length */
  } __packed;
  
  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;
  
  #define SMB2_CLIENT_GUID_SIZE 16
  
  extern __u8 cifs_client_guid[SMB2_CLIENT_GUID_SIZE];
  
  struct smb2_negotiate_req {
  	struct smb2_hdr hdr;
  	__le16 StructureSize; /* Must be 36 */
  	__le16 DialectCount;
  	__le16 SecurityMode;
  	__le16 Reserved;	/* MBZ */
  	__le32 Capabilities;
  	__u8   ClientGUID[SMB2_CLIENT_GUID_SIZE];
  	__le64 ClientStartTime;	/* MBZ */
  	__le16 Dialects[1]; /* One dialect (vers=) at a time for now */
  } __packed;
  
  /* Dialects */
  #define SMB20_PROT_ID 0x0202
  #define SMB21_PROT_ID 0x0210
  #define SMB30_PROT_ID 0x0300
  #define SMB302_PROT_ID 0x0302
  #define BAD_PROT_ID   0xFFFF
  
  /* SecurityMode flags */
  #define	SMB2_NEGOTIATE_SIGNING_ENABLED	0x0001
  #define SMB2_NEGOTIATE_SIGNING_REQUIRED	0x0002
  /* 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
  
  struct smb2_negotiate_rsp {
  	struct smb2_hdr hdr;
  	__le16 StructureSize;	/* Must be 65 */
  	__le16 SecurityMode;
  	__le16 DialectRevision;
  	__le16 Reserved;	/* MBZ */
  	__u8   ServerGUID[16];
  	__le32 Capabilities;
  	__le32 MaxTransactSize;
  	__le32 MaxReadSize;
  	__le32 MaxWriteSize;
  	__le64 SystemTime;	/* MBZ */
  	__le64 ServerStartTime;
  	__le16 SecurityBufferOffset;
  	__le16 SecurityBufferLength;
  	__le32 Reserved2;	/* may be any value, ignore */
  	__u8   Buffer[1];	/* variable length GSS security buffer */
  } __packed;
  
  struct smb2_sess_setup_req {
  	struct smb2_hdr hdr;
  	__le16 StructureSize; /* Must be 25 */
  	__u8   VcNumber;
  	__u8   SecurityMode;
  	__le32 Capabilities;
  	__le32 Channel;
  	__le16 SecurityBufferOffset;
  	__le16 SecurityBufferLength;
  	__le64 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_hdr 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_hdr hdr;
  	__le16 StructureSize;	/* Must be 4 */
  	__le16 Reserved;
  } __packed;
  
  struct smb2_logoff_rsp {
  	struct smb2_hdr hdr;
  	__le16 StructureSize;	/* Must be 4 */
  	__le16 Reserved;
  } __packed;
  
  struct smb2_tree_connect_req {
  	struct smb2_hdr hdr;
  	__le16 StructureSize;	/* Must be 9 */
  	__le16 Reserved;
  	__le16 PathOffset;
  	__le16 PathLength;
  	__u8   Buffer[1];	/* variable length */
  } __packed;
  
  struct smb2_tree_connect_rsp {
  	struct smb2_hdr 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 SHI1005_FLAGS_ALL				0x0000FF33
  
  /* 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 */
  
  struct smb2_tree_disconnect_req {
  	struct smb2_hdr hdr;
  	__le16 StructureSize;	/* Must be 4 */
  	__le16 Reserved;
  } __packed;
  
  struct smb2_tree_disconnect_rsp {
  	struct smb2_hdr 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
  
  /* 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		"AlSi"
  #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"
  
  struct smb2_create_req {
  	struct smb2_hdr 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;
  
  struct smb2_create_rsp {
  	struct smb2_hdr hdr;
  	__le16 StructureSize;	/* Must be 89 */
  	__u8   OplockLevel;
  	__u8   Reserved;
  	__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			__constant_cpu_to_le32(0x00)
  #define SMB2_LEASE_READ_CACHING		__constant_cpu_to_le32(0x01)
  #define SMB2_LEASE_HANDLE_CACHING	__constant_cpu_to_le32(0x02)
  #define SMB2_LEASE_WRITE_CACHING	__constant_cpu_to_le32(0x04)
  
  #define SMB2_LEASE_FLAG_BREAK_IN_PROGRESS __constant_cpu_to_le32(0x02)
  
  #define SMB2_LEASE_KEY_SIZE 16
  
  struct lease_context {
  	__le64 LeaseKeyLow;
  	__le64 LeaseKeyHigh;
  	__le32 LeaseState;
  	__le32 LeaseFlags;
  	__le64 LeaseDuration;
  } __packed;
  
  struct lease_context_v2 {
  	__le64 LeaseKeyLow;
  	__le64 LeaseKeyHigh;
  	__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;
  
  #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;
  
  struct copychunk_ioctl_rsp {
  	__le32 ChunksWritten;
  	__le32 ChunkBytesWritten;
  	__le32 TotalBytesWritten;
  } __packed;
  
  struct validate_negotiate_info_req {
  	__le32 Capabilities;
  	__u8   Guid[SMB2_CLIENT_GUID_SIZE];
  	__le16 SecurityMode;
  	__le16 DialectCount;
  	__le16 Dialects[1]; /* dialect (someday maybe list) client asked for */
  } __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	0x00000001
  #define RDMA_CAPABLE	0x00000002
  
  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;
  	char	SockAddr_Storage[128];
  } __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 smb2_ioctl_req {
  	struct smb2_hdr 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_hdr 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_hdr hdr;
  	__le16 StructureSize;	/* Must be 24 */
  	__le16 Flags;
  	__le32 Reserved;
  	__u64  PersistentFileId; /* opaque endianness */
  	__u64  VolatileFileId; /* opaque endianness */
  } __packed;
  
  struct smb2_close_rsp {
  	struct smb2_hdr 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_hdr 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_hdr 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
  
  /* Channel field for read and write: exactly one of following flags can be set*/
  #define SMB2_CHANNEL_NONE		0x00000000
  #define SMB2_CHANNEL_RDMA_V1		0x00000001 /* SMB3 or later */
  #define SMB2_CHANNEL_RDMA_V1_INVALIDATE 0x00000001 /* SMB3.02 or later */
  
  struct smb2_read_req {
  	struct smb2_hdr 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; /* Reserved MBZ */
  	__le16 ReadChannelInfoLength; /* Reserved MBZ */
  	__u8   Buffer[1];
  } __packed;
  
  struct smb2_read_rsp {
  	struct smb2_hdr 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_hdr 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; /* Reserved MBZ */
  	__le16 WriteChannelInfoLength; /* Reserved MBZ */
  	__le32 Flags;
  	__u8   Buffer[1];
  } __packed;
  
  struct smb2_write_rsp {
  	struct smb2_hdr hdr;
  	__le16 StructureSize; /* Must be 17 */
  	__u8   DataOffset;
  	__u8   Reserved;
  	__le32 DataLength;
  	__le32 DataRemaining;
  	__u32  Reserved2;
  	__u8   Buffer[1];
  } __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_hdr 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_hdr hdr;
  	__le16 StructureSize; /* Must be 4 */
  	__le16 Reserved;
  } __packed;
  
  struct smb2_echo_req {
  	struct smb2_hdr hdr;
  	__le16 StructureSize;	/* Must be 4 */
  	__u16  Reserved;
  } __packed;
  
  struct smb2_echo_rsp {
  	struct smb2_hdr 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_hdr 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_hdr 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
  
  struct smb2_query_info_req {
  	struct smb2_hdr 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_hdr hdr;
  	__le16 StructureSize; /* Must be 9 */
  	__le16 OutputBufferOffset;
  	__le32 OutputBufferLength;
  	__u8   Buffer[1];
  } __packed;
  
  struct smb2_set_info_req {
  	struct smb2_hdr 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_hdr hdr;
  	__le16 StructureSize; /* Must be 2 */
  } __packed;
  
  struct smb2_oplock_break {
  	struct smb2_hdr 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_hdr hdr;
  	__le16 StructureSize; /* Must be 44 */
  	__le16 Reserved;
  	__le32 Flags;
  	__u8   LeaseKey[16];
  	__le32 CurrentLeaseState;
  	__le32 NewLeaseState;
  	__le32 BreakReason;
  	__le32 AccessMaskHint;
  	__le32 ShareMaskHint;
  } __packed;
  
  struct smb2_lease_ack {
  	struct smb2_hdr 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 */
  
  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;
  
  /* 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 */
  
  /*
   * 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 */
  
  #endif				/* _SMB2PDU_H */