[Bugs] [Bug 1567864] New: `quota list` command displays 'N/A' when root of the volume is empty

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1567864

            Bug ID: 1567864
           Summary: `quota list` command displays 'N/A' when root of the
                    volume is empty
           Product: Red Hat Gluster Storage
           Version: 3.4
         Component: quota
          Keywords: Triaged
          Severity: high
          Priority: low
          Assignee: sunnikri at redhat.com
          Reporter: vpapnoi at redhat.com
        QA Contact: rhinduja at redhat.com
                CC: anoopcs at redhat.com, bugs at gluster.org,
                    jthottan at redhat.com, rhs-bugs at redhat.com,
                    storage-qa-internal at redhat.com, sunnikri at redhat.com,
                    vnosov at stonefly.com, zhou.lei56 at zte.com.cn
        Depends On: 1408359



+++ This bug was initially created as a clone of Bug #1408359 +++

Description of problem:
Even after setting a particular quota limit on '/' i.e, root of the volume,
subsequent quota list command displays 'N/A' as usage limit for '/'.

How reproducible:
Always

Steps to Reproduce:
1. Apply https://review.gluster.org/#/c/12256/ on top of master branch.
2. Build and install GlusterFS
3. Run the attached test case named 'failing-test-case.t'

Actual results:
EXPECT_WITHIN $MARKER_UPDATE_TIMEOUT "10.0MB" quota_list_field "/" 5
not ok 6 Got "N/A" instead of "10.0MB", LINENUM:17

Expected results:
Tests should complete successfully.

Additional info:
As of now root of the volume is non-empty as we were having .trashcan directory
created by default. But with the patch mentioned in 'Steps to Reproduce' this
behaviour is being targeted to change by 3.10. See
https://github.com/gluster/glusterfs/issues/65 for more details.

A modified test case named 'passing-test-case.t' is also attached which runs
successfully by creating a test file at root of the volume.

--- Additional comment from Anoop C S on 2016-12-22 23:50 EST ---



--- Additional comment from Sanoj Unnikrishnan on 2017-07-27 09:33:24 EDT ---

THe issue is that the root path does not have the size xattr and hence in both 
print_quota_list_from_mountdir and print_quota_list_from_quotad, we print N/A
(print_quota_list_empty) if the size xattr is not found. A stat on the root
path does not still heal the size xattr. Needs to RCA fruther.

--- Additional comment from Sanoj Unnikrishnan on 2017-11-03 05:59:55 EDT ---



--- Additional comment from Sanoj Unnikrishnan on 2017-11-10 00:42:59 EST ---


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1408359
[Bug 1408359] `quota list` command displays 'N/A' when root of the volume
is empty
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