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 Fri, 30 Oct 2020 11:39:49 +0300 (MSK)
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 <20201028185650.GA198833@grain>
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From: Serge Petrenko <sergepetrenko@tarantool.org>
Message-ID: <570630ad-1fcb-b50b-3d55-d75a8e80be77@tarantool.org>
Date: Fri, 30 Oct 2020 11:39:48 +0300
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Subject: Re: [Tarantool-patches] [PATCH v3] raft: make sure the voking mask
	is wide enough
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To: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: tml <tarantool-patches@dev.tarantool.org>, Vladislav Shpilevoy <v.shpilevoy@tarantool.org>


30.10.2020 11:30, Cyrill Gorcunov пишет:
> The vote_mask is declared as uint32_t which is highly coupled
> with VCLOCK_MAX, lets add a compile time test to be sure.
>
> Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
> ---
> v2:
>   Use CHAR_BIT instead of hardcoded bits number
>
>   src/box/raft.c |    6 ++++++
>   1 file changed, 6 insertions(+)
>
> Index: tarantool.git/src/box/raft.c
> ===================================================================
> --- tarantool.git.orig/src/box/raft.c
> +++ tarantool.git/src/box/raft.c
> @@ -1061,4 +1061,10 @@ raft_init(void)
>   {
>   	ev_timer_init(&raft.timer, raft_sm_schedule_new_election_cb, 0, 0);
>   	rlist_create(&raft.on_update);
> +
> +	/*
> +	 * Make sure there is enough bits to track all replicas.
> +	 */
> +	static_assert(sizeof(raft.vote_mask) * CHAR_BIT >= VCLOCK_MAX,
> +		      "RAFT: vote_mask is too short");
>   }
Thanks for the fix! LGTM.

-- 
Serge Petrenko