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From 0c16442f2d93f32a229b87d2672e2dc8025ec704 Mon Sep 17 00:00:00 2001
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From: Jan Friesse <jfriesse@redhat.com>
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Date: Wed, 4 Mar 2020 11:42:15 +0100
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Subject: [PATCH] votequorum: Change check of expected_votes
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Previously value of new expected_votes was checked so newly computed
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quorum value was in the interval <total_votes / 2, total_votes>. The
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upper range prevented the cluster to become unquorate, but bottom check
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was almost useless because it allowed to change expected_votes so it is
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smaller than total_votes.
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Solution is to check if expected_votes is bigger or equal to total_votes
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and for quorate cluster only check if cluster doesn't become unquorate
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(for unquorate cluster one can set upper range freely - as it is
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perfectly possible when using config file)
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Signed-off-by: Jan Friesse <jfriesse@redhat.com>
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Reviewed-by: Christine Caulfield <ccaulfie@redhat.com>
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---
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exec/votequorum.c | 10 +++++++---
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1 file changed, 7 insertions(+), 3 deletions(-)
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diff --git a/exec/votequorum.c b/exec/votequorum.c
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index 52424fa..b152425 100644
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--- a/exec/votequorum.c
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+++ b/exec/votequorum.c
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@@ -1,5 +1,5 @@
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/*
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- * Copyright (c) 2009-2015 Red Hat, Inc.
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+ * Copyright (c) 2009-2020 Red Hat, Inc.
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*
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* All rights reserved.
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*
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@@ -2688,8 +2688,12 @@ static void message_handler_req_lib_votequorum_setexpected (void *conn, const vo
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*/
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newquorum = calculate_quorum(1, req_lib_votequorum_setexpected->expected_votes, &total_votes);
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allow_downscale = allow_downscale_status;
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- if (newquorum < total_votes / 2 ||
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- newquorum > total_votes) {
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+ /*
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+ * Setting expected_votes < total_votes doesn't make sense.
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+ * For quorate cluster prevent cluster to become unquorate.
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+ */
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+ if (req_lib_votequorum_setexpected->expected_votes < total_votes ||
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+ (cluster_is_quorate && (newquorum > total_votes))) {
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error = CS_ERR_INVALID_PARAM;
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goto error_exit;
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}
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--
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1.8.3.1
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