[Bugs] [Bug 1291638] New: tier : Demotion failure for char type file

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1291638

            Bug ID: 1291638
           Summary: tier : Demotion failure for char type file
           Product: Red Hat Gluster Storage
           Version: 3.1
         Component: glusterfs
     Sub Component: tiering
          Keywords: Triaged
          Severity: medium
          Priority: medium
          Assignee: rhs-bugs at redhat.com
          Reporter: jthottan at redhat.com
        QA Contact: nchilaka at redhat.com
                CC: bugs at gluster.org, jthottan at redhat.com,
                    nbalacha at redhat.com, rkavunga at redhat.com
        Depends On: 1291635, 1291637



+++ This bug was initially created as a clone of Bug #1291637 +++

+++ This bug was initially created as a clone of Bug #1291635 +++

Description of problem:
Demotion failure for char type file. It should fail all special(CHAR, BLOCK,
SOCKET etc) type files other than regular, but for me issue is seen in char
type file. From the logs, it is clear that lookup(dht_revalidate_cbk) on this
file failed in cold tier due to type mismatch 

Version-Release number of selected component (if applicable):
mainline

How reproducible:
always

Steps to Reproduce:
1.Create and start a tier volume
2.set tier mod= test(preferable to use other demotion paremeters)
3.mount the volume(any protocol) 
4.create a char type file using mknod
5.after some time(promotion will happen)
6.When tier daemon tries to demote, it will fail. Failure messages are flooded
in tier log

Actual results:
Demotion failed

Expected results:
Demotion should not fail

Additional info:
snippet from tier daemon log :

[2015-12-11 13:00:10.407115] E [MSGID: 109037] [tier.c:1489:tier_start]
0-test-tier-dht: Demotion failed
13:00:10.355941] and [2015-12-11 13:00:20.417126]
[2015-12-11 13:00:20.421914] W [MSGID: 109008]
[dht-common.c:826:dht_revalidate_cbk] 0-test-cold-dht: mismatching filetypes 01
v/s 05 for //char, gfid = b7f40bcd-3153-4619-bd19-28797d1b5ce5
[2015-12-11 13:00:20.421987] W [MSGID: 109023]
[dht-rebalance.c:969:migrate_special_files] 0-test-tier-dht: //char: lookup
failed (Invalid argument)
[2015-12-11 13:00:20.422605] E [MSGID: 109037]
[tier.c:489:tier_migrate_using_query_file] 0-test-tier-dht: Failed to migrate
char


char is file name


Referenced Bugs:

https://bugzilla.redhat.com/show_bug.cgi?id=1291635
[Bug 1291635] tier : Demotion failure for char type file
https://bugzilla.redhat.com/show_bug.cgi?id=1291637
[Bug 1291637] tier : Demotion failure for char type file
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