[LU-19231] Update mount utility to use fsconfig API backend of libmount

• Type: Improvement
• Resolution: Unresolved
• Priority: Medium
• Affects Version/s: Lustre 2.17.0
• Labels: medium upstream
• Environment: Any supported platform except for SuSE 12P4 running a 4.12 kernel.
• Severity: 3
• Assignee: WC Triage
• Reporter: James A Simmons

Description

Before moving to the new fs_context kernel API we need to update our tools to use this infrastructure. The new functions are fsopen() / fsconfig() / fsmount(). The good news is that libmount that we already use supports this back end. We could easily move mount_lustre.c to using more of libmount which should support both mount() for the fsXXX functions.

Issue Links

• is related to: LU-19238 tunefs.lustre: exiting with 7 (Argument list too long)
• is related to: LU-12511 Prepare lustre for adoption into the linux kernel
• is related to: LU-19230 User linux kernel fs_context API
• is related to: LU-996 add standard "user" mount option to mount.lustre