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sys: IRP_MJ_CREATE

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This commit is contained in:
Bill Zissimopoulos 2015-12-02 21:05:29 -08:00
parent 44f34b9295
commit 26b4727a0b
4 changed files with 50 additions and 3 deletions
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23
src/sys/create.c
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@ -70,6 +70,7 @@ static NTSTATUS FspFsvolCreate(
BOOLEAN HasTraversePrivilege = BooleanFlagOn(AccessState->Flags, TOKEN_HAS_TRAVERSE_PRIVILEGE);
BOOLEAN HasTrailingBackslash = FALSE;
FSP_FILE_CONTEXT *FsContext = 0;
FSP_FSCTL_TRANSACT_REQ *Request;
/* cannot open the volume object */
if (0 == RelatedFileObject && 0 == FileName.Length)
@ -164,6 +165,28 @@ static NTSTATUS FspFsvolCreate(
* From this point forward we MUST remember to delete the FsContext on error.
*/
/* create the user-mode file system request */
Result = FspIopCreateRequest(Irp, FsContext->FileName.Length, &Request);
if (!NT_SUCCESS(Result))
{
FspFileContextDelete(FsContext);
return Result;
}
/* !!!: populate the request */
/*
* Post the IRP to our Ioq; we do this here instead of at FSP_LEAVE_MJ time,
* so that we can FspFileContextDelete() on failure.
*/
if (!FspIoqPostIrp(&FsvrtDeviceExtension->Ioq, Irp))
{
/* this can only happen if the Ioq was stopped */
ASSERT(FspIoqStopped(&FsvrtDeviceExtension->Ioq));
FspFileContextDelete(FsContext);
return STATUS_CANCELLED;
}
return STATUS_PENDING;
}

3
src/sys/driver.h
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@ -246,6 +246,7 @@ BOOLEAN FspIoqStartProcessingIrp(FSP_IOQ *Ioq, PIRP Irp);
PIRP FspIoqEndProcessingIrp(FSP_IOQ *Ioq, UINT_PTR IrpHint);
/* I/O processing */
NTSTATUS FspIopCreateRequest(PIRP Irp, ULONG ExtraSize, FSP_FSCTL_TRANSACT_REQ **PRequest);
VOID FspIopCompleteRequest(PIRP Irp, NTSTATUS Result);
VOID FspIopDispatchComplete(PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response);
@ -337,7 +338,7 @@ typedef struct
UNICODE_STRING FileName;
WCHAR FileNameBuf[];
} FSP_FILE_CONTEXT;
NTSTATUS FspFileContextCreate(SIZE_T ExtraSize, FSP_FILE_CONTEXT **PContext);
NTSTATUS FspFileContextCreate(ULONG ExtraSize, FSP_FILE_CONTEXT **PContext);
VOID FspFileContextDelete(FSP_FILE_CONTEXT *Context);
/* misc */

4
src/sys/fileobj.c
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@ -6,7 +6,7 @@
#include <sys/driver.h>
NTSTATUS FspFileContextCreate(SIZE_T ExtraSize, FSP_FILE_CONTEXT **PContext);
NTSTATUS FspFileContextCreate(ULONG ExtraSize, FSP_FILE_CONTEXT **PContext);
VOID FspFileContextDelete(FSP_FILE_CONTEXT *Context);
#ifdef ALLOC_PRAGMA
@ -14,7 +14,7 @@ VOID FspFileContextDelete(FSP_FILE_CONTEXT *Context);
#pragma alloc_text(PAGE, FspFileContextDelete)
#endif
NTSTATUS FspFileContextCreate(SIZE_T ExtraSize, FSP_FILE_CONTEXT **PFsContext)
NTSTATUS FspFileContextCreate(ULONG ExtraSize, FSP_FILE_CONTEXT **PFsContext)
{
PAGED_CODE();

23
src/sys/iop.c
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@ -6,12 +6,35 @@
#include <sys/driver.h>
NTSTATUS FspIopCreateRequest(PIRP Irp, ULONG ExtraSize, FSP_FSCTL_TRANSACT_REQ **PRequest);
VOID FspIopDispatchComplete(PIRP Irp, const FSP_FSCTL_TRANSACT_RSP *Response);
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspIopCreateRequest)
#pragma alloc_text(PAGE, FspIopDispatchComplete)
#endif
NTSTATUS FspIopCreateRequest(PIRP Irp, ULONG ExtraSize, FSP_FSCTL_TRANSACT_REQ **PRequest)
{
PAGED_CODE();
*PRequest = 0;
FSP_FSCTL_TRANSACT_REQ *Request = ExAllocatePoolWithTag(PagedPool,
sizeof *Request + ExtraSize, FSP_TAG);
if (0 == Request)
return STATUS_INSUFFICIENT_RESOURCES;
RtlZeroMemory(Request, sizeof *Request + ExtraSize);
Request->Size = (UINT16)(sizeof *Request + ExtraSize);
Request->Hint = (UINT_PTR)Irp;
Irp->Tail.Overlay.DriverContext[0] = Request;
*PRequest = Request;
return STATUS_SUCCESS;
}
VOID FspIopCompleteRequest(PIRP Irp, NTSTATUS Result)
{
// !PAGED_CODE();