[LU-15971] Implicit default LMV inherit

Fri, 9 Jun 2023 12:25:52 +0000

With implicit default LMV inherit, the inherited default LMV is maintained on client side.

Benefits:

change of directory default LMV will be populated to all sub levels at runtime automatically.
default LMV will be packed into mkdir request, therefore MDT doesn't need read it from disk, as will improve mkdir performance.

Caveats:

old and new clients can't coexist, because after new client mkdir,
the inherited default LMV is not set on MDT inode, then the old
client won't know its existence.

Changes on client side:

Changes on MDT side:

Whamcloud Community JIRA