ebadf.sh
[LU-5957] Broken layout after swapping layouts with unstriped files Created: 26/Nov/14 Updated: 01/Sep/16 Resolved: 03/Feb/15 |
|
| Status: | Resolved |
| Project: | Lustre |
| Component/s: | None |
| Affects Version/s: | Lustre 2.4.1, Lustre 2.7.0, Lustre 2.5.3 |
| Fix Version/s: | Lustre 2.7.0 |
| Type: | Bug | Priority: | Minor |
| Reporter: | Henri Doreau (Inactive) | Assignee: | Bruno Faccini (Inactive) |
| Resolution: | Fixed | Votes: | 0 |
| Labels: | cea, patch | ||
| Attachments: |
ebadf.sh
|
| Severity: | 3 |
| Rank (Obsolete): | 16639 |
| Description |
|
The following operations sequence eventually fails with EBADF (let fstripe be a striped file, fnostripeX unstriped files): 1) swap_layouts fstripe fnostripe1 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... |
| Comments |
| Comment by Henri Doreau (Inactive) [ 26/Nov/14 ] |
|
"unstriped" is probably poorly chosen, I mean files with no LOV EA. |
| Comment by Bruno Faccini (Inactive) [ 27/Nov/14 ] |
|
I wonder if this could be related to |
| Comment by Henri Doreau (Inactive) [ 27/Nov/14 ] |
|
I don't think so, according to our analysis (which just ended) this is a server-side issue. It comes from a missing clear of a MDT flag after a swap layout that removes LOV. We will provide a patch. |
| Comment by Bruno Faccini (Inactive) [ 28/Nov/14 ] |
|
Ah ok, so I wonder if this could be in mdd_swap_layouts() after the swap has been re-ordered to start by the no layout file ?? |
| Comment by Gerrit Updater [ 28/Nov/14 ] |
|
Henri Doreau (henri.doreau@cea.fr) uploaded a new patch: http://review.whamcloud.com/12877 |
| Comment by Henri Doreau (Inactive) [ 28/Nov/14 ] |
|
Bruno, as you might see in the patch above it's an mdt issue: an I/O on a non-striped file invokes mdt_create_data, which creates the LOV and set MOF_LOV_CREATED on the object. If you "destripe" this object again an re-do an I/O this flag will prevent the LOV from being re-created as expected. |
| Comment by Gerrit Updater [ 03/Feb/15 ] |
|
Oleg Drokin (oleg.drokin@intel.com) merged in patch http://review.whamcloud.com/12877/ |
| Comment by Peter Jones [ 03/Feb/15 ] |
|
Landed for 2.7 |
| Comment by Henri Doreau (Inactive) [ 09/Feb/15 ] |
|
Could this be considered for 2.5? |
| Comment by Gerrit Updater [ 30/Mar/15 ] |
|
Henri Doreau (henri.doreau@cea.fr) uploaded a new patch: http://review.whamcloud.com/14255 |
| Comment by Henri Doreau (Inactive) [ 30/Mar/15 ] |
|
Here is a 2.5 backport: http://review.whamcloud.com/14255 |