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authorAnand Avati <avati@redhat.com>2013-03-27 19:55:58 -0700
committerAnand Avati <avati@redhat.com>2013-03-27 22:16:12 -0700
commit8909c28c1173e10fd2f10706bd8a0f2ca5b5d685 (patch)
treeec51c2507b2c50ca8bb01453c9645d49b38ee88e /extras
parentca10fdc81a72a71ac67ac9fc8c5ad5b92febd875 (diff)
cluster/afr: fsync() guarantees POST-OP completion
AFR now provides a stronger guarantee that fsync() returns only after completely finishing all the deferred/delayed POST-OP on that open file. To acheive this we make a stub out of the returning fsync and register it with the "delayed" frame in afr_changelog_wake_resume(). The delayed frame, after getting woken up and finishing the POST-OP will call_resume() the registered stub (which UNWINDs the fsync) at the time of frame destruction. This provides a guarantee that an application's (or FUSE) fsync() returns only after finishing up all the previous transactions, including delayed POST-OPs and UNLOCK. Change-Id: Iaa955457e2f25088a144fde37ad0444277b5cf49 BUG: 927146 Signed-off-by: Anand Avati <avati@redhat.com> Reviewed-on: http://review.gluster.org/4737 Tested-by: Gluster Build System <jenkins@build.gluster.com> Reviewed-by: Pranith Kumar Karampuri <pkarampu@redhat.com>
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