Bug 1285783

+++ This bug was initially created as a clone of Bug #1284823 +++

Description of problem:

tests/basic/tier/fop-during-migration.t was written using pure distribute hot and cold tiers
If the test is modified to have dist-rep cold and hot tiers, the following operation fails with EINVAL:

echo $TEST_STR > $M0/dir1/FILE1



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


How reproducible:


Steps to Reproduce:
1. Modify tests/basic/tier/fop-during-migration.t to use dist-rep tiers
2. run tests/basic/tier/fop-during-migration.t
3.

Actual results:

Fails with EINVAL

Expected results:

The test should pass.

Additional info:

--- Additional comment from Nithya Balachandran on 2015-11-24 04:58:28 EST ---

Analysis:

echo $TEST_STR > $M0/dir1/FILE1

performs an ftruncate operation.

Investigation reveals that when a file is being migrated by the tier layer, the redirection of the ftruncate FOP to the dst subvol fails as posix_ftruncate fails in sys_ftruncate with op_errno EINVAL. This is because the fd being used has flags=0.

AFR calls afr_fix_open() to open the fd on the dst subvol but ends up using flags = 0 (instead of using the required flags). This causes the ftruncate to fail with EINVAL.

--- Additional comment from Vijay Bellur on 2015-11-25 10:50:27 EST ---

REVIEW: http://review.gluster.org/12750 (cluster/dht : Ftruncate on migrating file fails with EINVAL) posted (#1) for review on master by N Balachandran (nbalacha)