[RFC PATCH 07/36] cifs: Add "Has dynamic part" flag form SMB2/3 StructureSize LSB

[David Howells <dhowells@redhat.com>]

The LSB in the StructureSize that follows the smb2/3_hdr struct isn't
really part of the length, but is rather a flag indicating that the
operation structure is dynamic in size, so define a symbol for it.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Steve French <sfrench@samba.org>
cc: Paulo Alcantara <pc@manguebit.org>
cc: Shyam Prasad N <sprasad@microsoft.com>
cc: linux-cifs@vger.kernel.org
cc: netfs@lists.linux.dev
cc: linux-fsdevel@vger.kernel.org
---
 fs/smb/common/smb2pdu.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/smb/common/smb2pdu.h b/fs/smb/common/smb2pdu.h
index aeb0a245c532..dc5ec2643669 100644
--- a/fs/smb/common/smb2pdu.h
+++ b/fs/smb/common/smb2pdu.h
@@ -185,6 +185,7 @@ struct smb3_hdr_req {
 struct smb2_pdu {
 	struct smb2_hdr hdr;
 	__le16 StructureSize2; /* size of wct area (varies, request specific) */
+#define SMB2_STRUCT_HAS_DYNAMIC_PART   0x01
 } __packed;
 
 #define SMB2_ERROR_STRUCTURE_SIZE2	9