[LU-17550] direct IO does not return ENODATA on crossover to empty layout

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Severity: 3
• Assignee: Patrick Farrell (Inactive)
• Reporter: Patrick Farrell (Inactive)

Description

When a write crosses from an area of a file with a layout to one without, the write should return ENODATA.  Due to layout caching in the direct IO path, we need an extra check for this to work correctly for DIO.

Fixes: 14db1faa0f ("LU-13799 lov: Cache stripe offset calculation")