netdev - Re: [PATCH net-next] net: sched: set dedicated tcf

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Message-Id: <20190225.101829.46711684456598689.davem@davemloft.net>
Date:   Mon, 25 Feb 2019 10:18:29 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     vladbu@...lanox.com
Cc:     netdev@...r.kernel.org, jhs@...atatu.com, xiyou.wangcong@...il.com,
        jiri@...nulli.us
Subject: Re: [PATCH net-next] net: sched: set dedicated tcf_walker flag
 when tp is empty

From: Vlad Buslov <vladbu@...lanox.com>
Date: Mon, 25 Feb 2019 17:38:31 +0200

> Using tcf_walker->stop flag to determine when tcf_walker->fn() was called
> at least once is unreliable. Some classifiers set 'stop' flag on error
> before calling walker callback, other classifiers used to call it with NULL
> filter pointer when empty. In order to prevent further regressions, extend
> tcf_walker structure with dedicated 'nonempty' flag. Set this flag in
> tcf_walker->fn() implementation that is used to check if classifier has
> filters configured.
> 
> Fixes: 8b64678e0af8 ("net: sched: refactor tp insert/delete for concurrent execution")
> Signed-off-by: Vlad Buslov <vladbu@...lanox.com>
> Suggested-by: Cong Wang <xiyou.wangcong@...il.com>

Applied, thanks.