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sys: IRP_MJ_CREATE: allow simple volume opens

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This commit is contained in:
Bill Zissimopoulos
2015-12-11 14:43:31 -08:00
parent a6c81010b6
commit 43b8fc00f5
5 changed files with 44 additions and 18 deletions
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38
src/sys/create.c
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@ -61,6 +61,15 @@ static NTSTATUS FspFsvolCreate(
{
PAGED_CODE();
/* open the volume object? */
if (0 == IrpSp->FileObject->FileName.Length &&
(0 == IrpSp->FileObject->RelatedFileObject ||
0 == IrpSp->FileObject->RelatedFileObject->FsContext))
{
Irp->IoStatus.Information = FILE_OPENED;
return STATUS_SUCCESS;
}
NTSTATUS Result;
FSP_FSVOL_DEVICE_EXTENSION *FsvolDeviceExtension = FspFsvolDeviceExtension(DeviceObject);
@ -95,13 +104,6 @@ static NTSTATUS FspFsvolCreate(
FSP_FILE_CONTEXT *FsContext = 0;
FSP_FSCTL_TRANSACT_REQ *Request;
/* cannot open the volume object */
if (0 == RelatedFileObject && 0 == FileName.Length)
{
Result = STATUS_ACCESS_DENIED;
goto exit;
}
/* cannot open a paging file */
if (FlagOn(Flags, SL_OPEN_PAGING_FILE))
{
@ -195,6 +197,15 @@ static NTSTATUS FspFsvolCreate(
/* is this a relative or absolute open? */
if (0 != RelatedFileObject)
{
FSP_FILE_CONTEXT *RelatedFsContext = RelatedFileObject->FsContext;
/* is this a valid RelatedFileObject? */
if (!FspFileContextIsValid(RelatedFsContext))
{
Result = STATUS_OBJECT_PATH_NOT_FOUND;
goto exit;
}
/* must be a relative path */
if (sizeof(WCHAR) <= FileName.Length && L'\\' == FileName.Buffer[0])
{
@ -202,9 +213,6 @@ static NTSTATUS FspFsvolCreate(
goto exit;
}
FSP_FILE_CONTEXT *RelatedFsContext = RelatedFileObject->FsContext;
ASSERT(0 != RelatedFsContext);
/* cannot FILE_DELETE_ON_CLOSE on the root directory */
if (sizeof(WCHAR) == RelatedFsContext->FileName.Length &&
0 == FileName.Length &&
@ -605,11 +613,6 @@ VOID FspFsvolCreateComplete(
* Looks like SUCCESS!
*/
/* record the user-mode file system contexts */
FsContext->UserContext = Response->Rsp.Create.Opened.UserContext;
FileObject->FsContext = FsContext;
FileObject->FsContext2 = (PVOID)(UINT_PTR)Response->Rsp.Create.Opened.UserContext2;
/* did an FsContext with the same UserContext already exist? */
if (!Inserted)
/* delete the newly created FsContext as it is not being used */
@ -618,6 +621,11 @@ VOID FspFsvolCreateComplete(
/* disassociate our FsContext from the Request */
FspIopRequestContext(Request, RequestFsContext) = 0;
/* record the user-mode file system contexts */
FsContext->UserContext = Response->Rsp.Create.Opened.UserContext;
FileObject->FsContext = FsContext;
FileObject->FsContext2 = (PVOID)(UINT_PTR)Response->Rsp.Create.Opened.UserContext2;
/* finish seting up the FileObject */
FileObject->Vpb = FsvrtDeviceObject->Vpb;