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sys: IRP_MJ_CREATE

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This commit is contained in:
Bill Zissimopoulos 2015-12-05 13:10:45 -08:00
parent 684a594385
commit 1f0942a100
2 changed files with 42 additions and 11 deletions
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16
inc/winfsp/fsctl.h
View File

@ -78,6 +78,11 @@ typedef struct
UINT32 NoSystemAccessCheck:1; /* if set the user-mode flie system performs access checks */
} FSP_FSCTL_VOLUME_PARAMS;
typedef struct
{
UINT16 Offset;
UINT16 Size;
} FSP_FSCTL_TRANSACT_BUF;
typedef struct
{
UINT16 Version;
UINT16 Size;
@ -90,8 +95,7 @@ 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 */
FSP_FSCTL_TRANSACT_BUF SecurityDescriptor; /* security descriptor for new files */
UINT64 AllocationSize; /* initial allocation size */
UINT64 AccessToken; /* (HANDLE); request access token; sent if NoAccessCheck is 0 */
UINT32 DesiredAccess; /* FILE_{READ_DATA,WRITE_DATA,etc.} */
@ -114,6 +118,7 @@ typedef struct
UINT64 UserContext2;
} Close;
} Req;
FSP_FSCTL_TRANSACT_BUF FileName;
FSP_FSCTL_DECLSPEC_ALIGN UINT8 Buffer[];
} FSP_FSCTL_TRANSACT_REQ;
typedef struct
@ -134,8 +139,11 @@ typedef struct
UINT64 UserContext; /* user context attached to an open file (unique file id) */
UINT64 UserContext2; /* user context attached to a kernel file object */
/* (only low 32 bits valid in 32-bit mode) */
UINT16 SecurityDescriptor; /* security descriptor for existing files (offset within Buffer) */
UINT16 SecurityDescriptorSize; /* security descriptor size */
union
{
FSP_FSCTL_TRANSACT_BUF SecurityDescriptor; /* security descriptor for existing files */
FSP_FSCTL_TRANSACT_BUF ReparseFileName; /* file name to use for STATUS_REPARSE */
} Buf;
} Create;
} Rsp;
FSP_FSCTL_DECLSPEC_ALIGN UINT8 Buffer[];

37
src/sys/create.c
View File

@ -241,12 +241,14 @@ static NTSTATUS FspFsvolCreate(
/* populate the Create request */
Request->Kind = FspFsctlTransactCreateKind;
Request->FileName.Offset = 0;
Request->FileName.Size = FsContext->FileName.Length + sizeof(WCHAR);
Request->Req.Create.CreateDisposition = CreateDisposition;
Request->Req.Create.CreateOptions = CreateOptions;
Request->Req.Create.FileAttributes = FileAttributes;
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.SecurityDescriptor.Offset = 0 == SecurityDescriptorSize ? 0 :
FSP_FSCTL_DEFAULT_ALIGN_UP(Request->FileName.Size);
Request->Req.Create.SecurityDescriptor.Size = (UINT16)SecurityDescriptorSize;
Request->Req.Create.AllocationSize = AllocationSize.QuadPart;
Request->Req.Create.AccessToken = 0;
Request->Req.Create.DesiredAccess = DesiredAccess;
@ -262,7 +264,7 @@ static NTSTATUS FspFsvolCreate(
if (IsAbsoluteSecurityDescriptor)
{
Result = RtlAbsoluteToSelfRelativeSD(SecurityDescriptor,
Request->Buffer + Request->Req.Create.SecurityDescriptor, &SecurityDescriptorSize);
Request->Buffer + Request->Req.Create.SecurityDescriptor.Offset, &SecurityDescriptorSize);
if (!NT_SUCCESS(Result))
{
FspFileContextDelete(FsContext);
@ -272,7 +274,7 @@ static NTSTATUS FspFsvolCreate(
}
}
else if (IsSelfRelativeSecurityDescriptor)
RtlCopyMemory(Request->Buffer + Request->Req.Create.SecurityDescriptor,
RtlCopyMemory(Request->Buffer + Request->Req.Create.SecurityDescriptor.Offset,
SecurityDescriptor, SecurityDescriptorSize);
/*
@ -351,8 +353,8 @@ VOID FspFsvolCreateComplete(
PFILE_OBJECT FileObject = IrpSp->FileObject;
PACCESS_STATE AccessState = IrpSp->Parameters.Create.SecurityContext->AccessState;
PSECURITY_DESCRIPTOR SecurityDescriptor =
(PVOID)(Response->Buffer + Response->Rsp.Create.SecurityDescriptor);
ULONG SecurityDescriptorSize = Response->Rsp.Create.SecurityDescriptorSize;
(PVOID)(Response->Buffer + Response->Rsp.Create.Buf.SecurityDescriptor.Offset);
ULONG SecurityDescriptorSize = Response->Rsp.Create.Buf.SecurityDescriptor.Size;
ACCESS_MASK DesiredAccess = IrpSp->Parameters.Create.SecurityContext->DesiredAccess;
USHORT ShareAccess = IrpSp->Parameters.Create.ShareAccess;
ULONG Flags = IrpSp->Flags;
@ -367,6 +369,27 @@ VOID FspFsvolCreateComplete(
{
FspFileContextDelete(FileObject->FsContext);
FileObject->FsContext = 0;
Irp->IoStatus.Information = Response->IoStatus.Information;
Result = Response->IoStatus.Status;
FSP_RETURN();
}
/* special case STATUS_REPARSE */
if (STATUS_REPARSE == Result)
{
if (IO_REPARSE != Response->IoStatus.Information &&
IO_REMOUNT != Response->IoStatus.Information)
{
FspFileContextDelete(FileObject->FsContext);
FileObject->FsContext = 0;
FSP_RETURN(Result = STATUS_ACCESS_DENIED);
}
if (IO_REPARSE != Response->IoStatus.Information)
{
}
Irp->IoStatus.Information = Response->IoStatus.Information;
Result = Response->IoStatus.Status;
FSP_RETURN();