[Bugs] [Bug 1516206] New: EC DISCARD doesn't punch hole properly

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1516206

            Bug ID: 1516206
           Summary: EC DISCARD doesn't punch hole properly
           Product: GlusterFS
           Version: mainline
         Component: disperse
          Assignee: bugs at gluster.org
          Reporter: sheggodu at redhat.com
                CC: bugs at gluster.org



Description of problem:
DISCARD operation on EC volume doesn't punch hole properly in some cases.



How reproducible:

Always

Steps to Reproduce:
1. Create 4+2 EC volume

2. Create file
dd if=/dev/urandom of=/mnt/file bs=1024 count=8

3. Punch hole
fallocate -p -o 1500 -l 3000 /mnt/file

4. When checked hole size is less than the specified size.
Actual results:


Expected results:

Discard should punch hole of the size specified.

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