[Bugs] [Bug 1378550] Moving multiple temporary files to the same destination concurrently causes ESTALE error

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1378550

Pranith Kumar K <pkarampu at redhat.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |nbalacha at redhat.com,
                   |                            |rgowdapp at redhat.com
          Component|posix                       |distribute



--- Comment #1 from Pranith Kumar K <pkarampu at redhat.com> ---
Du, Nitya,
       Based on my debugging inodelk keeps failing with ESTALE. When I checked
dht_rename(), I see that the inodelk is done both on source and destination
inodes. But because the test above can lead to deletion of the file we are
trying to lock on by the other 'while ()...' process the inodelk fails with
ESTALE. When I changed the test to rename to independent filenames, then
everything works as expected.
On mount1:
while true; do uuid="`uuidgen`"; echo "some data" > "test$uuid"; mv "test$uuid"
"test" -f; done

On mount2:
while true; do uuid="`uuidgen`"; echo "some data" > "test$uuid"; mv "test$uuid"
"test2" -f; done

Not sure how to fix this in DHT though. For now re-assigning the bug to DHT.

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