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Date: Mon, 20 May 2019 17:12:53 -0400
From: Jamal Hadi Salim <jhs@...atatu.com>
To: Edward Cree <ecree@...arflare.com>, Jiri Pirko <jiri@...nulli.us>,
Pablo Neira Ayuso <pablo@...filter.org>,
David Miller <davem@...emloft.net>
Cc: netdev <netdev@...r.kernel.org>,
Cong Wang <xiyou.wangcong@...il.com>,
Andy Gospodarek <andy@...yhouse.net>,
Jakub Kicinski <jakub.kicinski@...ronome.com>,
Michael Chan <michael.chan@...adcom.com>,
Vishal Kulkarni <vishal@...lsio.com>,
Cong Wang <xiyou.wangcong@...il.com>,
Vlad Buslov <vladbu@...lanox.com>
Subject: Re: [RFC PATCH v2 net-next 0/3] flow_offload: Re-add per-action
statistics
On 2019-05-20 2:36 p.m., Edward Cree wrote:
> On 20/05/2019 17:29, Jamal Hadi Salim wrote:
>> Maybe dump after each step and it will be easier to see what is
>> happening.
>>
>>> I don't *think* my changes can have caused this, but I'll try a test on a
>>> vanilla kernel just to make sure the same thing happens there.
>>
>> Possible an offload bug that was already in existence.
> I've now reproduced on vanilla net-next (63863ee8e2f6); the breakage occurs
> when I run `tc -s actions get action drop index 104`, even _without_ having
> previously deleted a rule.
> And in a correction to my last email, it turns out this *does* reproduce
> without offloading (I evidently didn't hit the right sequence to tickle
> the bug before).
>
Ok, so the "get" does it. Will try to reproduce when i get some
cycles. Meantime CCing Cong and Vlad.
cheers,
jamal
> # tc -stats filter show dev $vfrep parent ffff:
> filter protocol ip pref 49151 flower chain 0
> filter protocol ip pref 49151 flower chain 0 handle 0x1
> eth_type ipv4
> skip_sw
> in_hw in_hw_count 1
> action order 1: vlan push id 100 protocol 802.1Q priority 0 pipe
> index 3 ref 1 bind 1 installed 7 sec used 7 sec
> Action statistics:
> Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
> backlog 0b 0p requeues 0
>
> action order 2: mirred (Egress Mirror to device $pf) pipe
> index 102 ref 1 bind 1 installed 7 sec used 3 sec
> Action statistics:
> Sent 306 bytes 3 pkt (dropped 0, overlimits 0 requeues 0)
> Sent software 0 bytes 0 pkt
> Sent hardware 306 bytes 3 pkt
> backlog 0b 0p requeues 0
>
> action order 3: vlan pop pipe
> index 4 ref 1 bind 1 installed 7 sec used 7 sec
> Action statistics:
> Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
> backlog 0b 0p requeues 0
>
> action order 4: gact action drop
> random type none pass val 0
> index 104 ref 3 bind 2 installed 13 sec used 3 sec
> Action statistics:
> Sent 306 bytes 3 pkt (dropped 3, overlimits 0 requeues 0)
> Sent software 0 bytes 0 pkt
> Sent hardware 306 bytes 3 pkt
> backlog 0b 0p requeues 0
>
> filter protocol arp pref 49152 flower chain 0
> filter protocol arp pref 49152 flower chain 0 handle 0x1
> eth_type arp
> skip_sw
> in_hw in_hw_count 1
> action order 1: vlan push id 100 protocol 802.1Q priority 0 pipe
> index 1 ref 1 bind 1 installed 7 sec used 7 sec
> Action statistics:
> Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
> backlog 0b 0p requeues 0
>
> action order 2: mirred (Egress Mirror to device $pf) pipe
> index 101 ref 1 bind 1 installed 7 sec used 5 sec
> Action statistics:
> Sent 64 bytes 1 pkt (dropped 0, overlimits 0 requeues 0)
> Sent software 0 bytes 0 pkt
> Sent hardware 64 bytes 1 pkt
> backlog 0b 0p requeues 0
>
> action order 3: vlan pop pipe
> index 2 ref 1 bind 1 installed 7 sec used 7 sec
> Action statistics:
> Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
> backlog 0b 0p requeues 0
>
> action order 4: gact action drop
> random type none pass val 0
> index 104 ref 3 bind 2 installed 13 sec used 3 sec
> Action statistics:
> Sent 370 bytes 4 pkt (dropped 4, overlimits 0 requeues 0)
> Sent software 0 bytes 0 pkt
> Sent hardware 370 bytes 4 pkt
> backlog 0b 0p requeues 0
>
> # tc -s actions get action drop index 104
> total acts 0
>
> action order 1: gact action drop
> random type none pass val 0
> index 104 ref 3 bind 2 installed 27 sec used 17 sec
> Action statistics:
> Sent 370 bytes 4 pkt (dropped 4, overlimits 0 requeues 0)
> Sent software 0 bytes 0 pkt
> Sent hardware 370 bytes 4 pkt
> backlog 0b 0p requeues 0
> # tc -stats filter show dev $vfrep parent ffff:
> filter protocol ip pref 49151 flower chain 0
> filter protocol ip pref 49151 flower chain 0 handle 0x1
> eth_type ipv4
> skip_sw
> in_hw in_hw_count 1
> action order 1: vlan push id 100 protocol 802.1Q priority 0 pipe
> index 3 ref 1 bind 1 installed 26 sec used 26 sec
> Action statistics:
> Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
> backlog 0b 0p requeues 0
>
> action order 2: mirred (Egress Mirror to device $pf) pipe
> index 102 ref 1 bind 1 installed 26 sec used 22 sec
> Action statistics:
> Sent 306 bytes 3 pkt (dropped 0, overlimits 0 requeues 0)
> Sent software 0 bytes 0 pkt
> Sent hardware 306 bytes 3 pkt
> backlog 0b 0p requeues 0
>
> action order 3: vlan pop pipe
> index 4 ref 1 bind 1 installed 26 sec used 26 sec
> Action statistics:
> Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
> backlog 0b 0p requeues 0
>
> filter protocol arp pref 49152 flower chain 0
> filter protocol arp pref 49152 flower chain 0 handle 0x1
> eth_type arp
> skip_sw
> in_hw in_hw_count 1
> action order 1: vlan push id 100 protocol 802.1Q priority 0 pipe
> index 1 ref 1 bind 1 installed 27 sec used 27 sec
> Action statistics:
> Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
> backlog 0b 0p requeues 0
>
> action order 2: mirred (Egress Mirror to device $pf) pipe
> index 101 ref 1 bind 1 installed 27 sec used 17 sec
> Action statistics:
> Sent 256 bytes 4 pkt (dropped 0, overlimits 0 requeues 0)
> Sent software 0 bytes 0 pkt
> Sent hardware 256 bytes 4 pkt
> backlog 0b 0p requeues 0
>
> action order 3: vlan pop pipe
> index 2 ref 1 bind 1 installed 27 sec used 27 sec
> Action statistics:
> Sent 0 bytes 0 pkt (dropped 0, overlimits 0 requeues 0)
> backlog 0b 0p requeues 0
>
> #
>
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