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sys: IRP_MJ_CREATE

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This commit is contained in:
Bill Zissimopoulos 2015-12-03 18:40:02 -08:00
parent ca8a02bd9d
commit eb07db1d29
3 changed files with 25 additions and 21 deletions
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25
inc/winfsp/fsctl.h
View File

@ -38,11 +38,10 @@ extern const __declspec(selectany) GUID FspFsvrtDeviceClassGuid =
#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_TRANSACT_REQ_SIZEMAX \
FSP_FSCTL_ALIGN_UP(sizeof(FSP_FSCTL_TRANSACT_REQ) + 1024 * sizeof(WCHAR), FSP_FSCTL_DEFAULT_ALIGNMENT)
#define FSP_FSCTL_TRANSACT_RSP_SIZEMAX \
FSP_FSCTL_ALIGN_UP(sizeof(FSP_FSCTL_TRANSACT_RSP) + 1024 * sizeof(WCHAR), FSP_FSCTL_DEFAULT_ALIGNMENT)
FSP_FSCTL_ALIGN_UP(sizeof(FSP_FSCTL_VOLUME_PARAMS),\
FSP_FSCTL_DEFAULT_ALIGNMENT)
#define FSP_FSCTL_TRANSACT_REQ_SIZEMAX (4 * 1024)
#define FSP_FSCTL_TRANSACT_RSP_SIZEMAX (4 * 1024)
/* marshalling */
#pragma warning(push)
@ -92,18 +91,17 @@ typedef struct
UINT32 CreateDisposition; /* FILE_{SUPERSEDE,CREATE,OPEN,OPEN_IF,OVERWRITE,OVERWRITE_IF} */
UINT32 CreateOptions; /* FILE_{DIRECTORY_FILE,NON_DIRECTORY_FILE,etc.} */
UINT32 FileAttributes; /* FILE_ATTRIBUTE_{NORMAL,DIRECTORY,etc.} */
UINT16 SecurityDescriptor; /* security descriptor for new files (offset within Buffer) */
UINT16 SecurityDescriptorSize; /* security descriptor size */
UINT64 AllocationSize; /* initial allocation size */
UINT64 SecurityDescriptor; /* (PSECURITY_DESCRIPTOR); security to apply to new files */
UINT64 EaBuffer; /* (PVOID); reserved; not currently implemented */
UINT32 EaLength; /* (PVOID); reserved; not currently implemented */
UINT64 AccessToken; /* (HANDLE); request access token; sent if NoAccessCheck is 0 */
UINT32 DesiredAccess; /* FILE_{READ_DATA,WRITE_DATA,etc.} */
UINT32 ShareAccess; /* FILE_SHARE_{READ,WRITE,DELETE} */
UINT16 Ea; /* reserved; not currently implemented */
UINT16 EaSize; /* reserved; not currently implemented */
UINT32 UserMode:1; /* request originated in user mode */
UINT32 HasTraversePrivilege:1;
/* requestor has TOKEN_HAS_TRAVERSE_PRIVILEGE */
UINT32 OpenTargetDirectory:1;
/* open target directory and report FILE_{EXISTS,DOES_NOT_EXIST} */
UINT32 HasTraversePrivilege:1; /* requestor has TOKEN_HAS_TRAVERSE_PRIVILEGE */
UINT32 OpenTargetDirectory:1; /* open target dir and report FILE_{EXISTS,DOES_NOT_EXIST} */
UINT32 CaseSensitive:1; /* filename comparisons should be case-sensitive */
} Create;
struct
@ -117,7 +115,7 @@ typedef struct
UINT64 UserContext2;
} Close;
} Req;
FSP_FSCTL_DECLSPEC_ALIGN WCHAR FileName[];
FSP_FSCTL_DECLSPEC_ALIGN UINT8 Buffer[];
} FSP_FSCTL_TRANSACT_REQ;
typedef struct
{
@ -138,6 +136,7 @@ typedef struct
UINT64 UserContext2; /* user context attached to a kernel file object */
} Create;
} Rsp;
FSP_FSCTL_DECLSPEC_ALIGN UINT8 Buffer[];
} FSP_FSCTL_TRANSACT_RSP;
#pragma warning(pop)
static inline FSP_FSCTL_TRANSACT_REQ *FspFsctlTransactProduceRequest(

11
src/sys/create.c
View File

@ -60,6 +60,7 @@ 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;
USHORT ShareAccess = IrpSp->Parameters.Create.ShareAccess;
ULONG CreateDisposition = (IrpSp->Parameters.Create.Options >> 24) & 0xff;
ULONG CreateOptions = IrpSp->Parameters.Create.Options & 0xffffff;
@ -178,18 +179,18 @@ static NTSTATUS FspFsvolCreate(
Request->Req.Create.CreateDisposition = CreateDisposition;
Request->Req.Create.CreateOptions = CreateOptions;
Request->Req.Create.FileAttributes = FileAttributes;
Request->Req.Create.AllocationSize = AllocationSize.QuadPart;
Request->Req.Create.SecurityDescriptor = 0;
Request->Req.Create.EaBuffer = 0;
Request->Req.Create.EaLength = 0;
Request->Req.Create.SecurityDescriptorSize = 0;
Request->Req.Create.AllocationSize = AllocationSize.QuadPart;
Request->Req.Create.AccessToken = 0;
Request->Req.Create.DesiredAccess = DesiredAccess;
Request->Req.Create.ShareAccess = ShareAccess;
Request->Req.Create.DesiredAccess = DesiredAccess;
Request->Req.Create.Ea = 0;
Request->Req.Create.EaSize = 0;
Request->Req.Create.UserMode = UserMode == RequestorMode;
Request->Req.Create.HasTraversePrivilege = HasTraversePrivilege;
Request->Req.Create.CaseSensitive = BooleanFlagOn(Flags, SL_CASE_SENSITIVE);
Request->Req.Create.OpenTargetDirectory = BooleanFlagOn(Flags, SL_OPEN_TARGET_DIRECTORY);
Request->Req.Create.CaseSensitive = BooleanFlagOn(Flags, SL_CASE_SENSITIVE);
/*
* Post the IRP to our Ioq; we do this here instead of at FSP_LEAVE_MJ time,

10
src/sys/iop.c
View File

@ -25,18 +25,22 @@ NTSTATUS FspIopCreateRequest(
if (0 != FileName)
ExtraSize += FileName->Length + sizeof(WCHAR);
if (FSP_FSCTL_TRANSACT_REQ_SIZEMAX < sizeof *Request + ExtraSize)
return STATUS_INVALID_PARAMETER;
FSP_FSCTL_TRANSACT_REQ *Request = ExAllocatePoolWithTag(PagedPool,
sizeof *Request + ExtraSize, FSP_TAG);
if (0 == Request)
return STATUS_INSUFFICIENT_RESOURCES;
RtlZeroMemory(Request, sizeof *Request + ExtraSize);
RtlZeroMemory(Request, sizeof *Request);
Request->Size = (UINT16)(sizeof *Request + ExtraSize);
Request->Hint = (UINT_PTR)Irp;
if (0 != FileName)
{
RtlCopyMemory(Request->FileName, FileName->Buffer, FileName->Length);
Request->FileName[FileName->Length / 2] = L'\0';
RtlCopyMemory(Request->Buffer, FileName->Buffer, FileName->Length);
Request->Buffer[FileName->Length] = '\0';
Request->Buffer[FileName->Length + 1] = '\0';
}
Irp->Tail.Overlay.DriverContext[0] = Request;