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winfsp-tests: memfs

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This commit is contained in:
Bill Zissimopoulos 2016-03-06 10:33:58 -08:00
parent 025fb3c2a3
commit a3abbc0eb5
1 changed files with 70 additions and 0 deletions
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70
tst/winfsp-tests/memfs.cpp
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@ -408,6 +408,67 @@ static VOID Close(FSP_FILE_SYSTEM *FileSystem,
MemfsFileNodeDelete(FileNode);
}
static NTSTATUS Read(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request,
PVOID FileNode0, PVOID Buffer, UINT64 Offset, ULONG Length,
PULONG PBytesTransferred, FSP_FSCTL_FILE_INFO *FileInfo)
{
MEMFS_FILE_NODE *FileNode = (MEMFS_FILE_NODE *)FileNode0;
UINT64 EndOffset;
if (Offset >= FileNode->FileInfo.FileSize)
return STATUS_END_OF_FILE;
EndOffset = Offset + Length;
if (EndOffset > FileNode->FileInfo.FileSize)
EndOffset = FileNode->FileInfo.FileSize;
memcpy(Buffer, (PUINT8)FileNode->FileData + Offset, EndOffset - Offset);
*PBytesTransferred = (ULONG)(EndOffset - Offset);
*FileInfo = FileNode->FileInfo;
return STATUS_SUCCESS;
}
static NTSTATUS Write(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request,
PVOID FileNode0, PVOID Buffer, UINT64 Offset, ULONG Length, BOOLEAN Constrained,
PULONG PBytesTransferred, FSP_FSCTL_FILE_INFO *FileInfo)
{
MEMFS_FILE_NODE *FileNode = (MEMFS_FILE_NODE *)FileNode0;
UINT64 EndOffset;
if ((UINT64)-1LL == Offset)
Offset = FileNode->FileInfo.FileSize;
if (Constrained)
{
if (Offset >= FileNode->FileInfo.FileSize)
{
*PBytesTransferred = 0;
return STATUS_SUCCESS;
}
EndOffset = Offset + Length;
if (EndOffset > FileNode->FileInfo.FileSize)
EndOffset = FileNode->FileInfo.FileSize;
}
else
{
EndOffset = Offset + Length;
if (EndOffset > FileNode->FileInfo.FileSize)
SetFileSize(FileSystem, Request, FileNode, EndOffset, FileInfo);
}
memcpy((PUINT8)FileNode->FileData + Offset, Buffer, EndOffset - Offset);
*PBytesTransferred = (ULONG)(EndOffset - Offset);
*FileInfo = FileNode->FileInfo;
return STATUS_SUCCESS;
}
static NTSTATUS GetFileInfo(FSP_FILE_SYSTEM *FileSystem,
FSP_FSCTL_TRANSACT_REQ *Request,
PVOID FileNode0,
@ -447,11 +508,15 @@ NTSTATUS SetAllocationSize(FSP_FILE_SYSTEM *FileSystem,
PVOID FileNode0, UINT64 AllocationSize,
FSP_FSCTL_FILE_INFO *FileInfo)
{
MEMFS *Memfs = (MEMFS *)FileSystem->UserContext;
MEMFS_FILE_NODE *FileNode = (MEMFS_FILE_NODE *)FileNode0;
PVOID FileData;
if (FileNode->FileInfo.AllocationSize != AllocationSize)
{
if (AllocationSize > Memfs->MaxFileSize)
return STATUS_DISK_FULL;
FileData = realloc(FileNode->FileData, AllocationSize);
if (0 == FileData)
return STATUS_INSUFFICIENT_RESOURCES;
@ -487,6 +552,9 @@ NTSTATUS SetFileSize(FSP_FILE_SYSTEM *FileSystem,
return Result;
}
if (FileNode->FileInfo.FileSize < FileSize)
memset((PUINT8)FileNode->FileData + FileNode->FileInfo.FileSize, 0,
FileSize - FileNode->FileInfo.FileSize);
FileNode->FileInfo.FileSize = FileSize;
}
@ -615,6 +683,8 @@ static FSP_FILE_SYSTEM_INTERFACE MemfsInterface =
Overwrite,
Cleanup,
Close,
Read,
Write,
GetFileInfo,
SetBasicInfo,
SetAllocationSize,