From d7c30458c87f1341295f764e1a2a539dc4248ecc Mon Sep 17 00:00:00 2001 From: Ravishankar N Date: Wed, 15 Apr 2015 22:22:08 +0530 Subject: afr: add arbitration support Backport of http://review.gluster.org/#/c/10258/ Add logic in afr to work in conjunction with the arbiter xlator when a replica 3 arbiter volume is created. More specifically, this patch: * Enables full locks for afr data transaction for such volumes. * Removes the upfront marking of pending xattrs at the time of pre-op and defer it to post-op. (This is an arbiter independent change and is made for all afr transactions.) * After pre-op stage, check if we can proceed with the fop stage without ending up in split-brain by examining the changelog xattrs. * Unwinds the fop with failure if only one source was available at the time of pre-op and the fop happened to fail on particular source brick. * Skips data self-heal if arbiter brick is the only source available. * Adds the arbiter-count option to the shd graph. This patch is a part of the arbiter logic implementation for 3 way AFR details of which can be found at http://review.gluster.org/#/c/9656/ Change-Id: I9603db9d04de5626eb2f4d8d959ef5b46113561d BUG: 1217689 Signed-off-by: Ravishankar N Reviewed-on: http://review.gluster.org/10514 Tested-by: Gluster Build System Reviewed-by: Pranith Kumar Karampuri --- xlators/cluster/afr/src/afr-transaction.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'xlators/cluster/afr/src/afr-transaction.h') diff --git a/xlators/cluster/afr/src/afr-transaction.h b/xlators/cluster/afr/src/afr-transaction.h index c3ce333b771..47d43d88991 100644 --- a/xlators/cluster/afr/src/afr-transaction.h +++ b/xlators/cluster/afr/src/afr-transaction.h @@ -16,6 +16,8 @@ void afr_transaction_fop_failed (call_frame_t *frame, xlator_t *this, int child_index); +void +afr_txn_arbitrate_fop_cbk (call_frame_t *frame, xlator_t *this); int afr_lock_server_count (afr_private_t *priv, afr_transaction_type type); -- cgit