Bug 1496585

Summary: rgw_file: fix a special overlapped i/o case, increasing coverage
Product: [Red Hat Storage] Red Hat Ceph Storage Reporter: Matt Benjamin (redhat) <mbenjamin>
Component: RGWAssignee: Matt Benjamin (redhat) <mbenjamin>
Status: CLOSED ERRATA QA Contact: Tejas <tchandra>
Severity: medium Docs Contact:
Priority: low    
Version: 3.0CC: anharris, cbodley, ceph-eng-bugs, ceph-qe-bugs, hnallurv, kbader, kdreyer, mbenjamin, owasserm, sweil, tchandra
Target Milestone: rcKeywords: CodeChange
Target Release: 3.0   
Hardware: All   
OS: All   
Whiteboard:
Fixed In Version: RHEL: ceph-12.2.1-3.el7cp Ubuntu: ceph_12.2.1-10redhat1xenial Doc Type: If docs needed, set a value
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Last Closed: 2017-12-05 23:46:00 UTC Type: Bug
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Matt Benjamin (redhat) 2017-09-27 21:08:55 UTC 
Description of problem:
An upstream RGW NFS user reported that he had observed a Linux NFS client, mount -osync, re-sending an already-sent write segment overlapping a page boundary, along with a fix which detects and corrects this special case.  Since this case looks to the NFS server identical to one where an application does the same thing (e.g., we've observed gnu tar to do this when writing into NFS space), the fix for this bug also widens application coverage slightly.

How reproducible:
Not consistently reproducible.
Comment 19 errata-xmlrpc 2017-12-05 23:46:00 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2017:3387