[Bugs] [Bug 1323042] Inconsistent directory structure on dht subvols caused by parent layouts going stale during entry create operations because of fix-layout

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1323042



--- Comment #5 from krishnaram Karthick <kramdoss at redhat.com> ---
Verified the bug in build - glusterfs-3.7.9-5

Following steps were used to verify the fix

1) create a pure distribute volume 
2) Fuse mount the volume on a client, say client-1
3) gdb into the process of mount and have a breakpoint on 'dht_mkdir'
4) create a directory from client-1
5) print the value of hashed_subvol->name. Note down the value
6) Add more bricks
7) Run fix layout
8) Fuse mount the volume on a new client, say client-2
9) gdb into the process of mount and have a breakpoint on
'dht_mkdir_hashed_cbk'
10) print the value of hashed_subvol->name. Ensure this value is not the same
as the value in step 5
11) allow both process to continue
12) check if directory is created and gfid of the directory created on all the
sub-vols are same

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