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Merge branch 'release/1.4'

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This commit is contained in:
Bill Zissimopoulos 2018-11-26 14:59:38 -08:00
commit 5d2705f3f9
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2 changed files with 42 additions and 0 deletions
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27
src/sys/devctl.c
View File

@ -21,6 +21,8 @@
#include <sys/driver.h>
static NTSTATUS FspFsvrtDeviceControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
static NTSTATUS FspFsvolDeviceControl(
PDEVICE_OBJECT DeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp);
FSP_IOCMPL_DISPATCH FspFsvolDeviceControlComplete;
@ -28,6 +30,7 @@ static FSP_IOP_REQUEST_FINI FspFsvolDeviceControlRequestFini;
FSP_DRIVER_DISPATCH FspDeviceControl;
#ifdef ALLOC_PRAGMA
#pragma alloc_text(PAGE, FspFsvrtDeviceControl)
#pragma alloc_text(PAGE, FspFsvolDeviceControl)
#pragma alloc_text(PAGE, FspFsvolDeviceControlComplete)
#pragma alloc_text(PAGE, FspFsvolDeviceControlRequestFini)
@ -39,6 +42,28 @@ enum
RequestFileNode = 0,
};
static NTSTATUS FspFsvrtDeviceControl(
PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
PAGED_CODE();
/*
* Fix GitHub issue #177. All credit for the investigation of this issue
* and the suggested steps to reproduce and work around the problem goes
* to GitHub user @thinkport.
*
* When Windows attempts to mount a new volume it iterates over all disk file
* systems registered with IoRegisterFileSystem. Foreign (i.e. non-WinFsp) file
* systems would in some cases attempt to mount our Fsvrt volume device by
* sending it unknown IOCTL codes, which would then be failed with
* STATUS_INVALID_DEVICE_REQUEST. Unfortunately the file systems would then
* report this error code to the I/O Manager, which would cause it to abort the
* mounting process completely and thus WinFsp would never get a chance to
* mount its own volume device!
*/
return STATUS_UNRECOGNIZED_VOLUME;
}
static NTSTATUS FspFsvolDeviceControl(
PDEVICE_OBJECT FsvolDeviceObject, PIRP Irp, PIO_STACK_LOCATION IrpSp)
{
@ -155,6 +180,8 @@ NTSTATUS FspDeviceControl(
{
case FspFsvolDeviceExtensionKind:
FSP_RETURN(Result = FspFsvolDeviceControl(DeviceObject, Irp, IrpSp));
case FspFsvrtDeviceExtensionKind:
FSP_RETURN(Result = FspFsvrtDeviceControl(DeviceObject, Irp, IrpSp));
default:
FSP_RETURN(Result = STATUS_INVALID_DEVICE_REQUEST);
}

15
src/sys/driver.c
View File

@ -169,6 +169,21 @@ NTSTATUS DriverEntry(
&FspFsmupDeviceObject);
if (!NT_SUCCESS(Result))
goto exit;
#if DBG
/*
* Fix GitHub issue #177. All credit for the investigation of this issue
* and the suggested steps to reproduce and work around the problem goes
* to GitHub user @thinkport.
*
* On debug builds set DO_LOW_PRIORITY_FILESYSTEM to place the file system
* at the end of the file system list during IoRegisterFileSystem below.
* This allows us to test the behavior of our Fsvrt devices when foreign
* file systems attempt to use them for mounting.
*/
SetFlag(FspFsctlDiskDeviceObject->Flags, DO_LOW_PRIORITY_FILESYSTEM);
#endif
Result = FspDeviceInitialize(FspFsctlDiskDeviceObject);
ASSERT(STATUS_SUCCESS == Result);
Result = FspDeviceInitialize(FspFsctlNetDeviceObject);