[LU-5957] Broken layout after swapping layouts with unstriped files

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.7.0
• Affects Version/s: Lustre 2.4.1, Lustre 2.7.0, Lustre 2.5.3
• Labels: cea patch
• Severity: 3
• Assignee: Bruno Faccini (Inactive)
• Reporter: Henri Doreau (Inactive)

Description

The following operations sequence eventually fails with EBADF (let fstripe be a striped file, fnostripeX unstriped files):

1) swap_layouts fstripe fnostripe1
2) I/O into fstripe
3) swap_layouts fstripe fnostripe2
4) I/O into fstripe # Fails with EBADF

Please find a reproducer attached. This seems to affect current master as well as older versions of that provide layout swap.

The file remains unavailable, also after a client umount/remount or from another client.

It seems that lov_conf_set() doesn't call lov_layout_change() in the second case, leading to lov_io_init_empty() being called eventually on the write...