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sys: IRP_MJ_CREATE

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This commit is contained in:
Bill Zissimopoulos 2015-12-03 20:18:21 -08:00
parent eb07db1d29
commit b0066b81ac
3 changed files with 41 additions and 16 deletions
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17
inc/winfsp/fsctl.h
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@ -21,8 +21,9 @@ extern const __declspec(selectany) GUID FspFsvrtDeviceClassGuid =
/* alignment macros */
#define FSP_FSCTL_ALIGN_UP(x, s) (((x) + ((s) - 1L)) & ~((s) - 1L))
#define FSP_FSCTL_DEFAULT_ALIGNMENT (8)
#define FSP_FSCTL_DECLSPEC_ALIGN __declspec(align(8))
#define FSP_FSCTL_DEFAULT_ALIGNMENT 8
#define FSP_FSCTL_DEFAULT_ALIGN_UP(x) FSP_FSCTL_ALIGN_UP(x, FSP_FSCTL_DEFAULT_ALIGNMENT)
#define FSP_FSCTL_DECLSPEC_ALIGN __declspec(align(FSP_FSCTL_DEFAULT_ALIGNMENT))
/* fsctl device codes */
#define FSP_FSCTL_CREATE \
@ -37,9 +38,7 @@ extern const __declspec(selectany) GUID FspFsvrtDeviceClassGuid =
#define FSP_FSCTL_CREATE_BUFFER_SIZE 128
#define FSP_FSCTL_TRANSACT_BUFFER_SIZE (16 * 1024)
#define FSP_FSCTL_VOLUME_PARAMS_SIZE \
FSP_FSCTL_ALIGN_UP(sizeof(FSP_FSCTL_VOLUME_PARAMS),\
FSP_FSCTL_DEFAULT_ALIGNMENT)
#define FSP_FSCTL_VOLUME_PARAMS_SIZE FSP_FSCTL_DEFAULT_ALIGN_UP(sizeof(FSP_FSCTL_VOLUME_PARAMS))
#define FSP_FSCTL_TRANSACT_REQ_SIZEMAX (4 * 1024)
#define FSP_FSCTL_TRANSACT_RSP_SIZEMAX (4 * 1024)
@ -142,7 +141,7 @@ typedef struct
static inline FSP_FSCTL_TRANSACT_REQ *FspFsctlTransactProduceRequest(
FSP_FSCTL_TRANSACT_REQ *Request, SIZE_T RequestSize, PVOID RequestBufEnd)
{
PVOID NextRequest = (PUINT8)Request + FSP_FSCTL_ALIGN_UP(RequestSize, FSP_FSCTL_DEFAULT_ALIGNMENT);
PVOID NextRequest = (PUINT8)Request + FSP_FSCTL_DEFAULT_ALIGN_UP(RequestSize);
return NextRequest <= RequestBufEnd ? NextRequest : 0;
}
static inline const FSP_FSCTL_TRANSACT_REQ *FspFsctlTransactConsumeRequest(
@ -151,13 +150,13 @@ static inline const FSP_FSCTL_TRANSACT_REQ *FspFsctlTransactConsumeRequest(
if ((PUINT8)Request + sizeof(Request->Size) > (PUINT8)RequestBufEnd ||
sizeof(FSP_FSCTL_TRANSACT_REQ) > Request->Size)
return 0;
PVOID NextRequest = (PUINT8)Request + FSP_FSCTL_ALIGN_UP(Request->Size, FSP_FSCTL_DEFAULT_ALIGNMENT);
PVOID NextRequest = (PUINT8)Request + FSP_FSCTL_DEFAULT_ALIGN_UP(Request->Size);
return NextRequest <= RequestBufEnd ? NextRequest : 0;
}
static inline FSP_FSCTL_TRANSACT_RSP *FspFsctlTransactProduceResponse(
FSP_FSCTL_TRANSACT_RSP *Response, SIZE_T ResponseSize, PVOID ResponseBufEnd)
{
PVOID NextResponse = (PUINT8)Response + FSP_FSCTL_ALIGN_UP(ResponseSize, FSP_FSCTL_DEFAULT_ALIGNMENT);
PVOID NextResponse = (PUINT8)Response + FSP_FSCTL_DEFAULT_ALIGN_UP(ResponseSize);
return NextResponse <= ResponseBufEnd ? NextResponse : 0;
}
static inline const FSP_FSCTL_TRANSACT_RSP *FspFsctlTransactConsumeResponse(
@ -166,7 +165,7 @@ static inline const FSP_FSCTL_TRANSACT_RSP *FspFsctlTransactConsumeResponse(
if ((PUINT8)Response + sizeof(Response->Size) > (PUINT8)ResponseBufEnd ||
sizeof(FSP_FSCTL_TRANSACT_RSP) > Response->Size)
return 0;
PVOID NextResponse = (PUINT8)Response + FSP_FSCTL_ALIGN_UP(Response->Size, FSP_FSCTL_DEFAULT_ALIGNMENT);
PVOID NextResponse = (PUINT8)Response + FSP_FSCTL_DEFAULT_ALIGN_UP(Response->Size);
return NextResponse <= ResponseBufEnd ? NextResponse : 0;
}

32
src/sys/create.c
View File

@ -60,7 +60,8 @@ static NTSTATUS FspFsvolCreate(
KPROCESSOR_MODE RequestorMode = FlagOn(Flags, SL_FORCE_ACCESS_CHECK) ? UserMode : Irp->RequestorMode;
PACCESS_STATE AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
ACCESS_MASK DesiredAccess = IrpSp->Parameters.Create.SecurityContext->DesiredAccess;
//PSECURITY_DESCRIPTOR SecurityDescriptor = AccessState->SecurityDescriptor;
PSECURITY_DESCRIPTOR SecurityDescriptor = AccessState->SecurityDescriptor;
ULONG SecurityDescriptorSize = 0;
USHORT ShareAccess = IrpSp->Parameters.Create.ShareAccess;
ULONG CreateDisposition = (IrpSp->Parameters.Create.Options >> 24) & 0xff;
ULONG CreateOptions = IrpSp->Parameters.Create.Options & 0xffffff;
@ -68,6 +69,8 @@ static NTSTATUS FspFsvolCreate(
LARGE_INTEGER AllocationSize = Irp->Overlay.AllocationSize;
PFILE_FULL_EA_INFORMATION EaBuffer = Irp->AssociatedIrp.SystemBuffer;
//ULONG EaLength = IrpSp->Parameters.Create.EaLength;
BOOLEAN IsAbsoluteSecurityDescriptor = FALSE;
BOOLEAN IsSelfRelativeSecurityDescriptor = FALSE;
BOOLEAN HasTraversePrivilege = BooleanFlagOn(AccessState->Flags, TOKEN_HAS_TRAVERSE_PRIVILEGE);
BOOLEAN HasTrailingBackslash = FALSE;
FSP_FILE_CONTEXT *FsContext = 0;
@ -89,6 +92,26 @@ static NTSTATUS FspFsvolCreate(
if (0 != EaBuffer && !FsvrtDeviceExtension->VolumeParams.EaSupported)
return STATUS_EAS_NOT_SUPPORTED;
/* check security descriptor validity */
if (0 != SecurityDescriptor)
{
IsAbsoluteSecurityDescriptor = RtlValidSecurityDescriptor(SecurityDescriptor);
if (IsAbsoluteSecurityDescriptor)
{
Result = RtlAbsoluteToSelfRelativeSD(SecurityDescriptor, 0, &SecurityDescriptorSize);
if (STATUS_BUFFER_TOO_SMALL != Result)
return STATUS_INVALID_PARAMETER;
}
else
{
SecurityDescriptorSize = RtlLengthSecurityDescriptor(SecurityDescriptor);
IsSelfRelativeSecurityDescriptor = RtlValidRelativeSecurityDescriptor(
SecurityDescriptor, SecurityDescriptorSize, 0);
if (!IsSelfRelativeSecurityDescriptor)
return STATUS_INVALID_PARAMETER;
}
}
/* according to fastfat, filenames that begin with two backslashes are ok */
if (sizeof(WCHAR) * 2 <= FileName.Length &&
L'\\' == FileName.Buffer[1] && L'\\' == FileName.Buffer[0])
@ -167,7 +190,7 @@ static NTSTATUS FspFsvolCreate(
*/
/* create the user-mode file system request */
Result = FspIopCreateRequest(Irp, &FsContext->FileName, 0, &Request);
Result = FspIopCreateRequest(Irp, &FsContext->FileName, SecurityDescriptorSize, &Request);
if (!NT_SUCCESS(Result))
{
FspFileContextDelete(FsContext);
@ -179,8 +202,9 @@ static NTSTATUS FspFsvolCreate(
Request->Req.Create.CreateDisposition = CreateDisposition;
Request->Req.Create.CreateOptions = CreateOptions;
Request->Req.Create.FileAttributes = FileAttributes;
Request->Req.Create.SecurityDescriptor = 0;
Request->Req.Create.SecurityDescriptorSize = 0;
Request->Req.Create.SecurityDescriptor = 0 == SecurityDescriptor ? 0 :
FSP_FSCTL_DEFAULT_ALIGN_UP(FsContext->FileName.Length + sizeof(WCHAR));
Request->Req.Create.SecurityDescriptorSize = (UINT16)SecurityDescriptorSize;
Request->Req.Create.AllocationSize = AllocationSize.QuadPart;
Request->Req.Create.AccessToken = 0;
Request->Req.Create.DesiredAccess = DesiredAccess;

8
src/sys/iop.c
View File

@ -20,20 +20,22 @@ NTSTATUS FspIopCreateRequest(
{
PAGED_CODE();
FSP_FSCTL_TRANSACT_REQ *Request;
*PRequest = 0;
if (0 != FileName)
ExtraSize += FileName->Length + sizeof(WCHAR);
ExtraSize += FSP_FSCTL_DEFAULT_ALIGN_UP(FileName->Length + sizeof(WCHAR));
if (FSP_FSCTL_TRANSACT_REQ_SIZEMAX < sizeof *Request + ExtraSize)
return STATUS_INVALID_PARAMETER;
FSP_FSCTL_TRANSACT_REQ *Request = ExAllocatePoolWithTag(PagedPool,
Request = ExAllocatePoolWithTag(PagedPool,
sizeof *Request + ExtraSize, FSP_TAG);
if (0 == Request)
return STATUS_INSUFFICIENT_RESOURCES;
RtlZeroMemory(Request, sizeof *Request);
RtlZeroMemory(Request, sizeof *Request + ExtraSize);
Request->Size = (UINT16)(sizeof *Request + ExtraSize);
Request->Hint = (UINT_PTR)Irp;
if (0 != FileName)