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Date: Thu, 28 May 2020 07:57:53 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Roman Mashak <mrv@...atatu.com>, Jamal Hadi Salim <jhs@...atatu.com>, "David S . Miller" <davem@...emloft.net>, Sasha Levin <sashal@...nel.org>, netdev@...r.kernel.org Subject: [PATCH AUTOSEL 4.9 2/9] net sched: fix reporting the first-time use timestamp From: Roman Mashak <mrv@...atatu.com> [ Upstream commit b15e62631c5f19fea9895f7632dae9c1b27fe0cd ] When a new action is installed, firstuse field of 'tcf_t' is explicitly set to 0. Value of zero means "new action, not yet used"; as a packet hits the action, 'firstuse' is stamped with the current jiffies value. tcf_tm_dump() should return 0 for firstuse if action has not yet been hit. Fixes: 48d8ee1694dd ("net sched actions: aggregate dumping of actions timeinfo") Cc: Jamal Hadi Salim <jhs@...atatu.com> Signed-off-by: Roman Mashak <mrv@...atatu.com> Acked-by: Jamal Hadi Salim <jhs@...atatu.com> Signed-off-by: David S. Miller <davem@...emloft.net> Signed-off-by: Sasha Levin <sashal@...nel.org> --- include/net/act_api.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/net/act_api.h b/include/net/act_api.h index 82f3c912a5b1..051b90779708 100644 --- a/include/net/act_api.h +++ b/include/net/act_api.h @@ -94,7 +94,8 @@ static inline void tcf_tm_dump(struct tcf_t *dtm, const struct tcf_t *stm) { dtm->install = jiffies_to_clock_t(jiffies - stm->install); dtm->lastuse = jiffies_to_clock_t(jiffies - stm->lastuse); - dtm->firstuse = jiffies_to_clock_t(jiffies - stm->firstuse); + dtm->firstuse = stm->firstuse ? + jiffies_to_clock_t(jiffies - stm->firstuse) : 0; dtm->expires = jiffies_to_clock_t(stm->expires); } -- 2.25.1
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