[LU-18831] Add llapi_layout_set_by_fd to set a custom layout on an open file descriptor of a file without striping

• Type: Improvement
• Resolution: Unresolved
• Priority: Minor
• Affects Version/s: Lustre 2.17.0
• Severity: 3
• Assignee: Sylwyn Giardi
• Reporter: Guillaume Courrier

Description

The goal of this function is to take in a struct llapi_layout and a file descriptor then convert the layout into the struct lov_user_md, then store it into the trusted.lov xattr. This will allow copytools to add a custom layout on restore for example.