[LU-7543] reserve lock flags for upcoming features and future expansion

• Type: Bug
• Resolution: Fixed
• Priority: Major
• Fix Version/s: Lustre 2.8.0
• Severity: 3
• Assignee: nasf (Inactive)
• Reporter: nasf (Inactive)

Description

The obd_connect_flags field has almost run out of bits to add new features. Reserve the last few free bits for upcoming features and the very last bit for OBD_CONNECT_FLAGS2 to create obd_connect_flags2, to have space for new features. Any feature that is using a bit in obd_connect_flags2 needs to understand OBD_CONNECT_FLAGS2 as well.