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dll: UmFileContextIsUserContext2, UmFileContextIsFullContext support
This commit is contained in:
Bill Zissimopoulos
@ -78,8 +78,6 @@ FSP_FSCTL_STATIC_ASSERT(FSP_FSCTL_VOLUME_NAME_SIZEMAX <= 260 * sizeof(WCHAR),
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#define FSP_FSCTL_TRANSACT_BATCH_BUFFER_SIZEMIN (64 * 1024)
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#define FSP_FSCTL_TRANSACT_BUFFER_SIZEMIN FSP_FSCTL_TRANSACT_REQ_SIZEMAX
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#define FSP_FSCTL_TRANSACT_USERCONTEXT(s,i) (((PUINT64)&(s).UserContext)[i])
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/* marshalling */
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#pragma warning(push)
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#pragma warning(disable:4200) /* zero-sized array in struct/union */
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@ -151,8 +149,9 @@ typedef struct
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UINT32 PostCleanupOnDeleteOnly:1; /* post Cleanup when deleting a file only */
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UINT32 KmReservedFlags:5;
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/* user-mode flags */
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UINT32 UmFileNodeIsUserContext2:1; /* user mode: FileNode parameter is UserContext2 */
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UINT32 UmReservedFlags:15;
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UINT32 UmFileContextIsUserContext2:1; /* user mode: FileContext parameter is UserContext2 */
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UINT32 UmFileContextIsFullContext:1; /* user mode: FileContext parameter is FullContext */
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UINT32 UmReservedFlags:14;
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WCHAR Prefix[FSP_FSCTL_VOLUME_PREFIX_SIZE / sizeof(WCHAR)]; /* UNC prefix (\Server\Share) */
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WCHAR FileSystemName[FSP_FSCTL_VOLUME_FSNAME_SIZE / sizeof(WCHAR)];
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} FSP_FSCTL_VOLUME_PARAMS;
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@ -198,6 +197,11 @@ typedef struct
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WCHAR StreamNameBuf[];
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} FSP_FSCTL_STREAM_INFO;
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typedef struct
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{
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UINT64 UserContext;
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UINT64 UserContext2;
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} FSP_FSCTL_TRANSACT_FULL_CONTEXT;
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typedef struct
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{
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UINT16 Offset;
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UINT16 Size;
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@ -127,7 +127,35 @@ typedef enum
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* File system interface.
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*
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* The operations in this interface must be implemented by the user mode
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* file system.
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* file system. Not all operations need be implemented. For example,
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* a user mode file system that does not wish to support reparse points,
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* need not implement the reparse point operations.
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*
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* Most of the operations accept a FileContext parameter. This parameter
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* has different meanings depending on the value of the FSP_FSCTL_VOLUME_PARAMS
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* flags UmFileContextIsUserContext2 and UmFileContextIsFullContext.
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*
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* There are three cases to consider:
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* <ul>
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* <li>When both of these flags are unset (default), the FileContext parameter
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* represents the file node. The file node is a void pointer (or an integer
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* that can fit in a pointer) that is used to uniquely identify an open file.
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* Opening the same file name should always yield the same file node value
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* for as long as the file with that name remains open anywhere in the system.
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* </li>
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* <li>When the UmFileContextIsUserContext2 is set, the FileContext parameter
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* represents the file descriptor. The file descriptor is a void pointer (or
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* an integer that can fit in a pointer) that is used to identify an open
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* instance of a file. Opening the same file name may yield a different file
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* descriptor.
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* </li>
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* <li>When the UmFileContextIsFullContext is set, the FileContext parameter
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* is a pointer to a FSP_FSCTL_TRANSACT_FULL_CONTEXT. This allows a user mode
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* file system to access the low-level UserContext and UserContext2 values.
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* The UserContext is used to store the file node and the UserContext2 is
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* used to store the file descriptor for an open file.
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* </li>
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* </ul>
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*/
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typedef struct _FSP_FILE_SYSTEM_INTERFACE
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{
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@ -219,12 +247,8 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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* Windows GetSecurityDescriptorLength API. Will be NULL for named streams.
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* @param AllocationSize
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* Allocation size for the newly created file.
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* @param PFileNode [out]
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* Pointer that will receive the file node on successful return from this call. The file
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* node is a void pointer (or an integer that can fit in a pointer) that is used to
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* uniquely identify an open file. Opening the same file name should always return the same
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* file node value for as long as the file with that name remains open anywhere in the
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* system. The file system can place any value it needs here.
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* @param PFileContext [out]
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* Pointer that will receive the file context on successful return from this call.
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* @param FileInfo [out]
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* Pointer to a structure that will receive the file information on successful return
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* from this call. This information includes file attributes, file times, etc.
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@ -234,7 +258,7 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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NTSTATUS (*Create)(FSP_FILE_SYSTEM *FileSystem,
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PWSTR FileName, UINT32 CreateOptions, UINT32 GrantedAccess,
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UINT32 FileAttributes, PSECURITY_DESCRIPTOR SecurityDescriptor, UINT64 AllocationSize,
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PVOID *PFileNode, FSP_FSCTL_FILE_INFO *FileInfo);
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PVOID *PFileContext, FSP_FSCTL_FILE_INFO *FileInfo);
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/**
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* Open a file or directory.
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*
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@ -254,12 +278,8 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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* need not perform any additional checks. However this parameter may be useful to a user
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* mode file system; for example the WinFsp-FUSE layer uses this parameter to determine
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* which flags to use in its POSIX open() call.
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* @param PFileNode [out]
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* Pointer that will receive the file node on successful return from this call. The file
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* node is a void pointer (or an integer that can fit in a pointer) that is used to
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* uniquely identify an open file. Opening the same file name should always return the same
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* file node value for as long as the file with that name remains open anywhere in the
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* system. The file system can place any value it needs here.
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* @param PFileContext [out]
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* Pointer that will receive the file context on successful return from this call.
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* @param FileInfo [out]
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* Pointer to a structure that will receive the file information on successful return
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* from this call. This information includes file attributes, file times, etc.
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@ -268,14 +288,14 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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*/
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NTSTATUS (*Open)(FSP_FILE_SYSTEM *FileSystem,
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PWSTR FileName, UINT32 CreateOptions, UINT32 GrantedAccess,
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PVOID *PFileNode, FSP_FSCTL_FILE_INFO *FileInfo);
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PVOID *PFileContext, FSP_FSCTL_FILE_INFO *FileInfo);
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/**
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* Overwrite a file.
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*
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* @param FileSystem
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* The file system on which this request is posted.
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* @param FileNode
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* The file node of the file to overwrite.
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* @param FileContext
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* The file context of the file to overwrite.
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* @param FileAttributes
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* File attributes to apply to the overwritten file.
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* @param ReplaceFileAttributes
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@ -288,7 +308,7 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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* STATUS_SUCCESS or error code.
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*/
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NTSTATUS (*Overwrite)(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileNode, UINT32 FileAttributes, BOOLEAN ReplaceFileAttributes,
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PVOID FileContext, UINT32 FileAttributes, BOOLEAN ReplaceFileAttributes,
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FSP_FSCTL_FILE_INFO *FileInfo);
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/**
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* Cleanup a file.
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@ -315,8 +335,8 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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*
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* @param FileSystem
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* The file system on which this request is posted.
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* @param FileNode
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* The file node of the file or directory to cleanup.
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* @param FileContext
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* The file context of the file or directory to cleanup.
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* @param FileName
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* The name of the file or directory to cleanup. Sent only when a Delete is requested.
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* @param Delete
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@ -328,24 +348,24 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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* CanDelete
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*/
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VOID (*Cleanup)(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileNode, PWSTR FileName, BOOLEAN Delete);
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PVOID FileContext, PWSTR FileName, BOOLEAN Delete);
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/**
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* Close a file.
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*
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* @param FileSystem
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* The file system on which this request is posted.
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* @param FileNode
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* The file node of the file or directory to be closed.
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* @param FileContext
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* The file context of the file or directory to be closed.
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*/
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VOID (*Close)(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileNode);
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PVOID FileContext);
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/**
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* Read a file.
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*
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* @param FileSystem
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* The file system on which this request is posted.
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* @param FileNode
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* The file node of the file to be read.
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* @param FileContext
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* The file context of the file to be read.
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* @param Buffer
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* Pointer to a buffer that will receive the results of the read operation.
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* @param Offset
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@ -359,15 +379,15 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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* operation.
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*/
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NTSTATUS (*Read)(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileNode, PVOID Buffer, UINT64 Offset, ULONG Length,
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PVOID FileContext, PVOID Buffer, UINT64 Offset, ULONG Length,
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PULONG PBytesTransferred);
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/**
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* Write a file.
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*
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* @param FileSystem
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* The file system on which this request is posted.
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* @param FileNode
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* The file node of the file to be written.
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* @param FileContext
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* The file context of the file to be written.
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* @param Buffer
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* Pointer to a buffer that contains the data to write.
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* @param Offset
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@ -389,7 +409,7 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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* operation.
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*/
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NTSTATUS (*Write)(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileNode, PVOID Buffer, UINT64 Offset, ULONG Length,
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PVOID FileContext, PVOID Buffer, UINT64 Offset, ULONG Length,
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BOOLEAN WriteToEndOfFile, BOOLEAN ConstrainedIo,
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PULONG PBytesTransferred, FSP_FSCTL_FILE_INFO *FileInfo);
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/**
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@ -399,20 +419,20 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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*
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* @param FileSystem
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* The file system on which this request is posted.
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* @param FileNode
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* The file node of the file to be flushed. When NULL the whole volume is being flushed.
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* @param FileContext
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* The file context of the file to be flushed. When NULL the whole volume is being flushed.
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* @return
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* STATUS_SUCCESS or error code.
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*/
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NTSTATUS (*Flush)(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileNode);
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PVOID FileContext);
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/**
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* Get file or directory information.
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*
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* @param FileSystem
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* The file system on which this request is posted.
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* @param FileNode
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* The file node of the file or directory to get information for.
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* @param FileContext
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* The file context of the file or directory to get information for.
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* @param FileInfo [out]
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* Pointer to a structure that will receive the file information on successful return
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* from this call. This information includes file attributes, file times, etc.
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@ -420,15 +440,15 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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* STATUS_SUCCESS or error code.
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*/
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NTSTATUS (*GetFileInfo)(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileNode,
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PVOID FileContext,
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FSP_FSCTL_FILE_INFO *FileInfo);
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/**
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* Set file or directory basic information.
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*
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* @param FileSystem
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* The file system on which this request is posted.
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* @param FileNode
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* The file node of the file or directory to set information for.
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* @param FileContext
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* The file context of the file or directory to set information for.
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* @param FileAttributes
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* File attributes to apply to the file or directory. If the value INVALID_FILE_ATTRIBUTES
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* is sent, the file attributes should not be changed.
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@ -448,7 +468,7 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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* STATUS_SUCCESS or error code.
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*/
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NTSTATUS (*SetBasicInfo)(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileNode, UINT32 FileAttributes,
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PVOID FileContext, UINT32 FileAttributes,
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UINT64 CreationTime, UINT64 LastAccessTime, UINT64 LastWriteTime,
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FSP_FSCTL_FILE_INFO *FileInfo);
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/**
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@ -473,8 +493,8 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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*
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* @param FileSystem
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* The file system on which this request is posted.
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* @param FileNode
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* The file node of the file to set the file/allocation size for.
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* @param FileContext
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* The file context of the file to set the file/allocation size for.
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* @param NewSize
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* New file/allocation size to apply to the file.
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* @param SetAllocationSize
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@ -486,7 +506,7 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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* STATUS_SUCCESS or error code.
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*/
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NTSTATUS (*SetFileSize)(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileNode, UINT64 NewSize, BOOLEAN SetAllocationSize,
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PVOID FileContext, UINT64 NewSize, BOOLEAN SetAllocationSize,
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FSP_FSCTL_FILE_INFO *FileInfo);
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/**
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* Determine whether a file or directory can be deleted.
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@ -503,8 +523,8 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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*
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* @param FileSystem
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* The file system on which this request is posted.
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* @param FileNode
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* The file node of the file or directory to test for deletion.
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* @param FileContext
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* The file context of the file or directory to test for deletion.
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* @param FileName
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* The name of the file or directory to test for deletion.
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* @return
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@ -513,7 +533,7 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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* Cleanup
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*/
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NTSTATUS (*CanDelete)(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileNode, PWSTR FileName);
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PVOID FileContext, PWSTR FileName);
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/**
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* Renames a file or directory.
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*
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@ -528,8 +548,8 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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*
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* @param FileSystem
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* The file system on which this request is posted.
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* @param FileNode
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* The file node of the file or directory to be renamed.
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* @param FileContext
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* The file context of the file or directory to be renamed.
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* @param FileName
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* The current name of the file or directory to rename.
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* @param NewFileName
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@ -540,15 +560,15 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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* STATUS_SUCCESS or error code.
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*/
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NTSTATUS (*Rename)(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileNode,
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PVOID FileContext,
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PWSTR FileName, PWSTR NewFileName, BOOLEAN ReplaceIfExists);
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/**
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* Get file or directory security descriptor.
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*
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* @param FileSystem
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* The file system on which this request is posted.
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* @param FileNode
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* The file node of the file or directory to get the security descriptor for.
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* @param FileContext
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* The file context of the file or directory to get the security descriptor for.
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* @param SecurityDescriptor
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* Pointer to a buffer that will receive the file security descriptor on successful return
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* from this call. May be NULL.
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@ -560,15 +580,15 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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* STATUS_SUCCESS or error code.
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*/
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NTSTATUS (*GetSecurity)(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileNode,
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PVOID FileContext,
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PSECURITY_DESCRIPTOR SecurityDescriptor, SIZE_T *PSecurityDescriptorSize);
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/**
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* Set file or directory security descriptor.
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*
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* @param FileSystem
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* The file system on which this request is posted.
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* @param FileNode
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* The file node of the file or directory to set the security descriptor for.
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* @param FileContext
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* The file context of the file or directory to set the security descriptor for.
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* @param SecurityInformation
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* Describes what parts of the file or directory security descriptor should
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* be modified.
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@ -584,7 +604,7 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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* FspDeleteSecurityDescriptor
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*/
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NTSTATUS (*SetSecurity)(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileNode,
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PVOID FileContext,
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SECURITY_INFORMATION SecurityInformation, PSECURITY_DESCRIPTOR ModificationDescriptor,
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HANDLE AccessToken);
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/**
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@ -592,8 +612,8 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
|
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*
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* @param FileSystem
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* The file system on which this request is posted.
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* @param FileNode
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* The file node of the directory to be read.
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* @param FileContext
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* The file context of the directory to be read.
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* @param Buffer
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* Pointer to a buffer that will receive the results of the read operation.
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* @param Offset
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@ -617,7 +637,7 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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* FspFileSystemAddDirInfo
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*/
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NTSTATUS (*ReadDirectory)(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileNode, PVOID Buffer, UINT64 Offset, ULONG Length,
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PVOID FileContext, PVOID Buffer, UINT64 Offset, ULONG Length,
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PWSTR Pattern,
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PULONG PBytesTransferred);
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/**
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@ -669,8 +689,8 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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*
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* @param FileSystem
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* The file system on which this request is posted.
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* @param FileNode
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* The file node of the reparse point.
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* @param FileContext
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* The file context of the reparse point.
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* @param FileName
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* The file name of the reparse point.
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* @param Buffer
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@ -685,15 +705,15 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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* SetReparsePoint
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*/
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NTSTATUS (*GetReparsePoint)(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileNode,
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PVOID FileContext,
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PWSTR FileName, PVOID Buffer, PSIZE_T PSize);
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/**
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* Set reparse point.
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*
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* @param FileSystem
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* The file system on which this request is posted.
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* @param FileNode
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* The file node of the reparse point.
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* @param FileContext
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* The file context of the reparse point.
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||||
* @param FileName
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* The file name of the reparse point.
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* @param Buffer
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||||
@ -707,15 +727,15 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
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* GetReparsePoint
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*/
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NTSTATUS (*SetReparsePoint)(FSP_FILE_SYSTEM *FileSystem,
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PVOID FileNode,
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||||
PVOID FileContext,
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||||
PWSTR FileName, PVOID Buffer, SIZE_T Size);
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||||
/**
|
||||
* Delete reparse point.
|
||||
*
|
||||
* @param FileSystem
|
||||
* The file system on which this request is posted.
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||||
* @param FileNode
|
||||
* The file node of the reparse point.
|
||||
* @param FileContext
|
||||
* The file context of the reparse point.
|
||||
* @param FileName
|
||||
* The file name of the reparse point.
|
||||
* @param Buffer
|
||||
@ -726,15 +746,15 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
|
||||
* STATUS_SUCCESS or error code.
|
||||
*/
|
||||
NTSTATUS (*DeleteReparsePoint)(FSP_FILE_SYSTEM *FileSystem,
|
||||
PVOID FileNode,
|
||||
PVOID FileContext,
|
||||
PWSTR FileName, PVOID Buffer, SIZE_T Size);
|
||||
/**
|
||||
* Get named streams information.
|
||||
*
|
||||
* @param FileSystem
|
||||
* The file system on which this request is posted.
|
||||
* @param FileNode
|
||||
* The file node of the file or directory to get stream information for.
|
||||
* @param FileContext
|
||||
* The file context of the file or directory to get stream information for.
|
||||
* @param Buffer
|
||||
* Pointer to a buffer that will receive the stream information.
|
||||
* @param Length
|
||||
@ -747,7 +767,7 @@ typedef struct _FSP_FILE_SYSTEM_INTERFACE
|
||||
* FspFileSystemAddStreamInfo
|
||||
*/
|
||||
NTSTATUS (*GetStreamInfo)(FSP_FILE_SYSTEM *FileSystem,
|
||||
PVOID FileNode, PVOID Buffer, ULONG Length,
|
||||
PVOID FileContext, PVOID Buffer, ULONG Length,
|
||||
PULONG PBytesTransferred);
|
||||
|
||||
/*
|
||||
@ -775,7 +795,7 @@ typedef struct _FSP_FILE_SYSTEM
|
||||
UINT32 DebugLog;
|
||||
FSP_FILE_SYSTEM_OPERATION_GUARD_STRATEGY OpGuardStrategy;
|
||||
SRWLOCK OpGuardLock;
|
||||
BOOLEAN UmFileNodeIsUserContext2;
|
||||
BOOLEAN UmFileContextIsUserContext2, UmFileContextIsFullContext;
|
||||
} FSP_FILE_SYSTEM;
|
||||
typedef struct _FSP_FILE_SYSTEM_OPERATION_CONTEXT
|
||||
{
|
||||
|
||||
Reference in New Issue
Block a user