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sys: IRP_MJ_LOCK_CONTROL

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This commit is contained in:
Bill Zissimopoulos
2016-04-06 15:41:16 -07:00
parent b729500d7b
commit 218ad0be8c
3 changed files with 94 additions and 8 deletions
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44
src/sys/lockctl.c
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@ -7,7 +7,8 @@
#include <sys/driver.h>
static NTSTATUS FspFsvolLockControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp,
PBOOLEAN PIrpRelinquished);
FSP_IOCMPL_DISPATCH FspFsvolLockControlComplete;
FSP_DRIVER_DISPATCH FspLockControl;
@ -18,11 +19,27 @@ FSP_DRIVER_DISPATCH FspLockControl;
#endif
static NTSTATUS FspFsvolLockControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp,
PBOOLEAN PIrpRelinquished)
{
PAGED_CODE();
return STATUS_INVALID_DEVICE_REQUEST;
/* is this a valid FileObject? */
if (!FspFileNodeIsValid(IrpSp->FileObject->FsContext))
return STATUS_INVALID_DEVICE_REQUEST;
NTSTATUS Result;
PFILE_OBJECT FileObject = IrpSp->FileObject;
FSP_FILE_NODE *FileNode = FileObject->FsContext;
/* only regular files can be locked */
if (FileNode->IsDirectory)
return STATUS_INVALID_PARAMETER;
/* let the FSRTL package handle this one! */
Result = FspFileNodeProcessLockIrp(FileNode, Irp, PIrpRelinquished);
return Result;
}
NTSTATUS FspFsvolLockControlComplete(
@ -30,21 +47,36 @@ NTSTATUS FspFsvolLockControlComplete(
{
FSP_ENTER_IOC(PAGED_CODE());
FSP_LEAVE_IOC("%s", "");
FSP_LEAVE_IOC("FileObject=%p, "
"Key=%#lx, ByteOffset=%#lx:%#lx, Length=%ld",
IrpSp->FileObject,
IrpSp->Parameters.LockControl.Key,
IrpSp->Parameters.LockControl.ByteOffset.HighPart,
IrpSp->Parameters.LockControl.ByteOffset.LowPart,
IrpSp->Parameters.LockControl.Length);
}
NTSTATUS FspLockControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp)
{
BOOLEAN IrpRelinquished = FALSE;
FSP_ENTER_MJ(PAGED_CODE());
switch (FspDeviceExtension(DeviceObject)->Kind)
{
case FspFsvolDeviceExtensionKind:
FSP_RETURN(Result = FspFsvolLockControl(DeviceObject, Irp, IrpSp));
FSP_RETURN(Result = FspFsvolLockControl(DeviceObject, Irp, IrpSp, &IrpRelinquished));
default:
FSP_RETURN(Result = STATUS_INVALID_DEVICE_REQUEST);
}
FSP_LEAVE_MJ("%s", "");
FSP_LEAVE_MJ_COND(!IrpRelinquished && STATUS_PENDING != Result,
"FileObject=%p, "
"Key=%#lx, ByteOffset=%#lx:%#lx, Length=%ld",
IrpSp->FileObject,
IrpSp->Parameters.LockControl.Key,
IrpSp->Parameters.LockControl.ByteOffset.HighPart,
IrpSp->Parameters.LockControl.ByteOffset.LowPart,
IrpSp->Parameters.LockControl.Length);
}