Description of problem: For EC volume and nfs mount, creation of directory is giving EIO error. Version-Release number of selected component (if applicable): glusterfs 3.7.9 built on Jun 7 2016 12:00:32 Repository revision: git://git.gluster.com/glusterfs.git Copyright (c) 2006-2011 Gluster Inc. <http://www.gluster.com> GlusterFS comes with ABSOLUTELY NO WARRANTY. You may redistribute copies of GlusterFS under the terms of the GNU General Public License. How reproducible: 100% Steps to Reproduce: 1. Create a EC volume, Mount it through nfs on 2-3 differnet mount points. 2. Start IO. Create lots file in a for loop. 3. When IO's are going on, do add-brick and re balance. 4 - stop IO's and try to do mkdir on same point - It gives EIO. Actual results: mkdir giving EIO Expected results: mkdir should be successful Additional info:
RCA - In case of mkdir failure, dht expects error information so that it can act accordingly. In this case, after re balance, layout has been changed. mkdir with old layout returns EIO. EC gets this error in cbk->xdata but does not pass it back to dht. In this case dht will not be able to take corrective action.
REVIEW: http://review.gluster.org/14679 (cluster/ec: Pass xdata to dht in case of error) posted (#1) for review on master by Ashish Pandey (aspandey)
REVIEW: http://review.gluster.org/14679 (cluster/ec: Pass xdata to dht in case of error) posted (#2) for review on master by Ashish Pandey (aspandey)
COMMIT: http://review.gluster.org/14679 committed in master by Xavier Hernandez (xhernandez) ------ commit a837357c5c7873bf19155e76bf6c251fa799a605 Author: Ashish Pandey <aspandey> Date: Thu Jun 9 16:19:37 2016 +0530 cluster/ec: Pass xdata to dht in case of error Problem: In case of mkdir failure, dht expects error information so that it can act accordingly. Aftre adding bricks and re balance, layout gets changed. Fop "mkdir" with old layout returns EIO. EC gets this error in xdata but does not pass it back to dht. In this case dht will not be able to take corrective action. Solution: Return xdata back to dht Change-Id: I24def8038e6880607689b7b046dc6428f564c6ab BUG: 1344277 Signed-off-by: Ashish Pandey <aspandey> Reviewed-on: http://review.gluster.org/14679 Reviewed-by: Pranith Kumar Karampuri <pkarampu> Reviewed-by: Xavier Hernandez <xhernandez> Tested-by: Atin Mukherjee <amukherj> Smoke: Gluster Build System <jenkins.com> CentOS-regression: Gluster Build System <jenkins.com> NetBSD-regression: NetBSD Build System <jenkins.org>
Please reply (in Gerrit and here) to the comment in http://review.gluster.org/14690: xlators/cluster/ec/src/ec-dir-write.c Line 594: Other operations（fsync，writev....） have similar problems, modify together? If this indeed is an issue, send a follow-up patch to address it there too.
we shall send a separate patch that addresses rest of the fops to reduce the amount of testing that we need to do to qualify this patch.