Bug 1175745 - AFR + Snapshot : Read operation on file in split-brain is successful in USS
Summary: AFR + Snapshot : Read operation on file in split-brain is successful in USS
Keywords:
Status: CLOSED NEXTRELEASE
Alias: None
Product: GlusterFS
Classification: Community
Component: core
Version: 3.6.1
Hardware: x86_64
OS: Linux
unspecified
urgent
Target Milestone: ---
Assignee: bugs@gluster.org
QA Contact:
URL:
Whiteboard:
Depends On: 1171615
Blocks:
TreeView+ depends on / blocked
 
Reported: 2014-12-18 13:55 UTC by Vijaikumar Mallikarjuna
Modified: 2016-08-23 12:32 UTC (History)
5 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of: 1171615
Environment:
Last Closed: 2016-08-23 12:32:39 UTC
Regression: ---
Mount Type: ---
Documentation: ---
CRM:
Verified Versions:
Embargoed:


Attachments (Terms of Use)

Comment 1 Anand Avati 2014-12-26 05:28:02 UTC
REVIEW: http://review.gluster.org/9343 (gfapi: new inode created in glfs_resolve_component even if inode is in inode table) posted (#1) for review on release-3.6 by Sachin Pandit (spandit)

Comment 2 Anand Avati 2015-01-07 14:21:03 UTC
REVIEW: http://review.gluster.org/9343 (gfapi: new inode created in glfs_resolve_component even if inode is in inode table.) posted (#3) for review on release-3.6 by Sachin Pandit (spandit)

Comment 4 Pranith Kumar K 2016-08-23 12:32:39 UTC
commit 6b83a658ede66ebbb0983f1e4a326fd12cc91c34
Author: Rajesh Joseph <rjoseph>
Date:   Mon Dec 8 14:25:22 2014 +0530

    gfapi: new inode created in glfs_resolve_component even if inode is in inode table
    
    problem: USS allows split-brain file to be accessed while main volume
             gives I/O error.
    
    cause:
            AFR detects split-brain on lookup. It stores this information in
            inode context. open and readv fop checks this flag from inode context.
            open and readv fop fails if split-brain flag is set for the file.
    
            USS uses gfapi to access snapshot volume. During open call
            gfapi internally calls glfs_resolve_component. glfs_resolve_component
            generates a new inode even if inode is present for the file.
            Because of which afr_lookup acts on a new inode which does not
            contain the split-brain flag.
    
    Bug: 1171615
    
    Change-Id: I1b4fddf4bd3c734a319ecfae804a3439866d157c
    Signed-off-by: Rajesh Joseph <rjoseph>
    Reviewed-on: http://review.gluster.org/9253
    Reviewed-by: Vijaikumar Mallikarjuna <vmallika>
    Reviewed-by: Raghavendra Talur <rtalur>
    Reviewed-by: Poornima G <pgurusid>
    Reviewed-by: Pranith Kumar Karampuri <pkarampu>
    Tested-by: Gluster Build System <jenkins.com>
    Reviewed-by: Niels de Vos <ndevos>


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