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sys: IRP_MJ_READ, IRP_MJ_WRITE

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This commit is contained in:
Bill Zissimopoulos 2016-03-04 21:07:14 -08:00
parent 55a86ba8c6
commit 8b9e8499aa
3 changed files with 51 additions and 21 deletions
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4
inc/winfsp/fsctl.h
View File

@ -300,6 +300,10 @@ typedef struct
FSP_FSCTL_FILE_INFO FileInfo;
} Overwrite;
struct
{
FSP_FSCTL_FILE_INFO FileInfo;
} Read;
struct
{
FSP_FSCTL_FILE_INFO FileInfo;
} Write;

49
src/sys/read.c
View File

@ -35,6 +35,9 @@ enum
RequestSafeMdl = 1,
RequestAddress = 2,
RequestProcess = 3,
/* ReadNonCachedComplete retry */
RequestInfoChangeNumber = 0,
};
static NTSTATUS FspFsvolRead(
@ -277,13 +280,6 @@ NTSTATUS FspFsvolReadComplete(
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_FSCTL_TRANSACT_REQ *Request = FspIrpRequest(Irp);
PFILE_OBJECT FileObject = IrpSp->FileObject;
FSP_FILE_NODE *FileNode = FileObject->FsContext;
LARGE_INTEGER ReadOffset = IrpSp->Parameters.Read.ByteOffset;
BOOLEAN PagingIo = BooleanFlagOn(Irp->Flags, IRP_PAGING_IO);
BOOLEAN SynchronousIo = BooleanFlagOn(FileObject->Flags, FO_SYNCHRONOUS_IO);
if (!NT_SUCCESS(Response->IoStatus.Status))
{
Irp->IoStatus.Information = 0;
@ -291,16 +287,47 @@ NTSTATUS FspFsvolReadComplete(
FSP_RETURN();
}
FSP_FSCTL_TRANSACT_REQ *Request = FspIrpRequest(Irp);
PFILE_OBJECT FileObject = IrpSp->FileObject;
FSP_FILE_NODE *FileNode = FileObject->FsContext;
LARGE_INTEGER ReadOffset = IrpSp->Parameters.Read.ByteOffset;
BOOLEAN PagingIo = BooleanFlagOn(Irp->Flags, IRP_PAGING_IO);
BOOLEAN SynchronousIo = BooleanFlagOn(FileObject->Flags, FO_SYNCHRONOUS_IO);
ULONG InfoChangeNumber;
BOOLEAN Success;
if (!PagingIo)
{
if (FspFsctlTransactReadKind == Request->Kind)
{
InfoChangeNumber = FileNode->InfoChangeNumber;
FspIopResetRequest(Request, 0);
Request->Kind = FspFsctlTransactReservedKind;
FspIopRequestContext(Request, RequestInfoChangeNumber) = (PVOID)InfoChangeNumber;
}
else
InfoChangeNumber = (ULONG)(UINT_PTR)FspIopRequestContext(Request, RequestInfoChangeNumber);
Success = DEBUGTEST(90, TRUE) && FspFileNodeTryAcquireExclusive(FileNode, Main);
if (!Success)
{
FspIopRetryCompleteIrp(Irp, Response, &Result);
FSP_RETURN();
}
FspFileNodeTrySetFileInfo(FileNode, FileObject, &Response->Rsp.Read.FileInfo,
InfoChangeNumber);
/* update the current file offset if synchronous I/O (and not paging I/O) */
if (SynchronousIo)
FileObject->CurrentByteOffset.QuadPart =
ReadOffset.QuadPart + Response->IoStatus.Information;
}
FspFileNodeReleaseOwner(FileNode, Full, Request);
/* will also clear FspIrpFlags() */
FspFileNodeRelease(FileNode, Main);
}
else
FspIopResetRequest(Request, 0);
Irp->IoStatus.Information = Response->IoStatus.Information;
Result = STATUS_SUCCESS;
@ -343,7 +370,7 @@ static VOID FspFsvolReadNonCachedRequestFini(FSP_FSCTL_TRANSACT_REQ *Request, PV
if (0 != SafeMdl)
FspSafeMdlDelete(SafeMdl);
if (0 != Irp && 0 != FspIrpFlags(Irp))
if (0 != Irp)
{
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
FSP_FILE_NODE *FileNode = IrpSp->FileObject->FsContext;

19
src/sys/write.c
View File

@ -368,6 +368,13 @@ NTSTATUS FspFsvolWriteComplete(
{
FSP_ENTER_IOC(PAGED_CODE());
if (!NT_SUCCESS(Response->IoStatus.Status))
{
Irp->IoStatus.Information = 0;
Result = Response->IoStatus.Status;
FSP_RETURN();
}
FSP_FSCTL_TRANSACT_REQ *Request = FspIrpRequest(Irp);
PFILE_OBJECT FileObject = IrpSp->FileObject;
FSP_FILE_NODE *FileNode = FileObject->FsContext;
@ -377,13 +384,6 @@ NTSTATUS FspFsvolWriteComplete(
BOOLEAN PagingIo = BooleanFlagOn(Irp->Flags, IRP_PAGING_IO);
BOOLEAN SynchronousIo = BooleanFlagOn(FileObject->Flags, FO_SYNCHRONOUS_IO);
if (!NT_SUCCESS(Response->IoStatus.Status))
{
Irp->IoStatus.Information = 0;
Result = Response->IoStatus.Status;
FSP_RETURN();
}
if (!PagingIo)
{
/* update file info */
@ -396,8 +396,7 @@ NTSTATUS FspFsvolWriteComplete(
WriteOffset.QuadPart + Response->IoStatus.Information;
}
FspFileNodeReleaseOwner(FileNode, Full, Request);
/* will also clear FspIrpFlags() */
FspIopResetRequest(Request, 0);
Irp->IoStatus.Information = Response->IoStatus.Information;
Result = STATUS_SUCCESS;
@ -440,7 +439,7 @@ static VOID FspFsvolWriteNonCachedRequestFini(FSP_FSCTL_TRANSACT_REQ *Request, P
if (0 != SafeMdl)
FspSafeMdlDelete(SafeMdl);
if (0 != Irp && 0 != FspIrpFlags(Irp))
if (0 != Irp)
{
PIO_STACK_LOCATION IrpSp = IoGetCurrentIrpStackLocation(Irp);
FSP_FILE_NODE *FileNode = IrpSp->FileObject->FsContext;