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[NPFS]

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- Return buffer size if the buffer is too small

svn path=/trunk/; revision=47508
This commit is contained in:
Johannes Anderwald 2010-06-01 08:43:50 +00:00
parent cfc0d726f2
commit f346021e6c
1 changed files with 10 additions and 6 deletions
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16
reactos/drivers/filesystems/npfs/volume.c
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@ -23,12 +23,15 @@ NpfsQueryFsDeviceInformation(PFILE_FS_DEVICE_INFORMATION FsDeviceInfo,
DPRINT("FsDeviceInfo = %p\n", FsDeviceInfo); DPRINT("FsDeviceInfo = %p\n", FsDeviceInfo);
if (*BufferLength < sizeof(FILE_FS_DEVICE_INFORMATION)) if (*BufferLength < sizeof(FILE_FS_DEVICE_INFORMATION))
{
*BufferLength = sizeof(FILE_FS_DEVICE_INFORMATION);
return STATUS_BUFFER_OVERFLOW; return STATUS_BUFFER_OVERFLOW;
}
FsDeviceInfo->DeviceType = FILE_DEVICE_NAMED_PIPE; FsDeviceInfo->DeviceType = FILE_DEVICE_NAMED_PIPE;
FsDeviceInfo->Characteristics = 0; FsDeviceInfo->Characteristics = 0;
*BufferLength -= sizeof(FILE_FS_DEVICE_INFORMATION); *BufferLength = sizeof(FILE_FS_DEVICE_INFORMATION);
DPRINT("NpfsQueryFsDeviceInformation() finished.\n"); DPRINT("NpfsQueryFsDeviceInformation() finished.\n");
@ -44,7 +47,10 @@ NpfsQueryFsAttributeInformation(PFILE_FS_ATTRIBUTE_INFORMATION FsAttributeInfo,
DPRINT("FsAttributeInfo = %p\n", FsAttributeInfo); DPRINT("FsAttributeInfo = %p\n", FsAttributeInfo);
if (*BufferLength < sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + 8) if (*BufferLength < sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + 8)
{
*BufferLength = (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + 8);
return STATUS_BUFFER_OVERFLOW; return STATUS_BUFFER_OVERFLOW;
}
FsAttributeInfo->FileSystemAttributes = FILE_CASE_PRESERVED_NAMES; FsAttributeInfo->FileSystemAttributes = FILE_CASE_PRESERVED_NAMES;
FsAttributeInfo->MaximumComponentNameLength = 255; FsAttributeInfo->MaximumComponentNameLength = 255;
@ -53,7 +59,7 @@ NpfsQueryFsAttributeInformation(PFILE_FS_ATTRIBUTE_INFORMATION FsAttributeInfo,
L"NPFS"); L"NPFS");
DPRINT("NpfsQueryFsAttributeInformation() finished.\n"); DPRINT("NpfsQueryFsAttributeInformation() finished.\n");
*BufferLength -= (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + 8); *BufferLength = (sizeof(FILE_FS_ATTRIBUTE_INFORMATION) + 8);
return STATUS_SUCCESS; return STATUS_SUCCESS;
} }
@ -102,10 +108,8 @@ NpfsQueryVolumeInformation(PDEVICE_OBJECT DeviceObject,
} }
Irp->IoStatus.Status = Status; Irp->IoStatus.Status = Status;
if (NT_SUCCESS(Status)) Irp->IoStatus.Information = BufferLength;
Irp->IoStatus.Information = Stack->Parameters.QueryVolume.Length - BufferLength;
else
Irp->IoStatus.Information = 0;
IoCompleteRequest(Irp, IoCompleteRequest(Irp,
IO_NO_INCREMENT); IO_NO_INCREMENT);