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sys: FspFsextProvider

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This commit is contained in:
Bill Zissimopoulos 2019-06-14 21:22:01 -07:00
parent 6b83748d89
commit 2cd1bddafb
2 changed files with 36 additions and 1 deletions
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5
src/sys/driver.h
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@ -29,6 +29,7 @@
#include <ntstrsafe.h> #include <ntstrsafe.h>
#include <wdmsec.h> #include <wdmsec.h>
#include <winfsp/fsctl.h> #include <winfsp/fsctl.h>
#include <winfsp/fsext.h>
/* disable warnings */ /* disable warnings */
#pragma warning(disable:4100) /* unreferenced formal parameter */ #pragma warning(disable:4100) /* unreferenced formal parameter */
@ -1085,6 +1086,7 @@ typedef struct
PNOTIFY_SYNC NotifySync; PNOTIFY_SYNC NotifySync;
LIST_ENTRY NotifyList; LIST_ENTRY NotifyList;
FSP_STATISTICS *Statistics; FSP_STATISTICS *Statistics;
FSP_FSCTL_DECLSPEC_ALIGN UINT8 FsextData[];
} FSP_FSVOL_DEVICE_EXTENSION; } FSP_FSVOL_DEVICE_EXTENSION;
typedef struct typedef struct
{ {
@ -1176,6 +1178,9 @@ VOID FspDeviceGlobalUnlock(VOID)
//(FILE_DEVICE_DISK_FILE_SYSTEM == (DeviceObject)->DeviceType ?\ //(FILE_DEVICE_DISK_FILE_SYSTEM == (DeviceObject)->DeviceType ?\
// STATUS_VOLUME_DISMOUNTED : STATUS_DEVICE_NOT_CONNECTED) // STATUS_VOLUME_DISMOUNTED : STATUS_DEVICE_NOT_CONNECTED)
/* fsext */
FSP_FSEXT_PROVIDER *FspFsextProvider(VOID);
/* process buffers conditional usage */ /* process buffers conditional usage */
static inline static inline
BOOLEAN FspReadIrpShouldUseProcessBuffer(PIRP Irp, SIZE_T BufferSize) BOOLEAN FspReadIrpShouldUseProcessBuffer(PIRP Irp, SIZE_T BufferSize)

32
src/sys/fsext.c
View File

@ -22,7 +22,37 @@
#include <sys/driver.h> #include <sys/driver.h>
#include <winfsp/fsext.h> #include <winfsp/fsext.h>
static KSPIN_LOCK FsextSpinLock = 0;
FSP_FSEXT_PROVIDER *FsextProvider;
FSP_FSEXT_PROVIDER *FspFsextProvider(VOID)
{
FSP_FSEXT_PROVIDER *Provider;
KIRQL Irql;
KeAcquireSpinLock(&FsextSpinLock, &Irql);
Provider = FsextProvider;
KeReleaseSpinLock(&FsextSpinLock, Irql);
return Provider;
}
NTSTATUS FspFsextProviderRegister(FSP_FSEXT_PROVIDER *Provider) NTSTATUS FspFsextProviderRegister(FSP_FSEXT_PROVIDER *Provider)
{ {
return STATUS_TOO_LATE; NTSTATUS Result;
KIRQL Irql;
KeAcquireSpinLock(&FsextSpinLock, &Irql);
if (0 != FsextProvider)
{
Result = STATUS_TOO_LATE;
goto exit;
}
Provider->DeviceExtensionOffset = FIELD_OFFSET(FSP_FSVOL_DEVICE_EXTENSION, FsextData);
FsextProvider = Provider;
Result = STATUS_SUCCESS;
exit:
KeReleaseSpinLock(&FsextSpinLock, Irql);
return Result;
} }