Re: B53 DSA switch problem on Banana Pi-R1 on Fedora 26 - systemd-networkd problem

[Gerhard Wiesinger]

On 27.05.2018 22:35, Florian Fainelli wrote:
> Le 05/27/18 Ã 12:18, Gerhard Wiesinger a ÃcritÂ:
> > On 27.05.2018 21:01, Gerhard Wiesinger wrote:
> > > On 24.05.2018 08:22, Gerhard Wiesinger wrote:
> > > > On 24.05.2018 07:29, Gerhard Wiesinger wrote:
> > > > > After some analysis with Florian (thnx) we found out that the
> > > > > current implementation is broken:
> > > > >
> > > > > https://patchwork.ozlabs.org/patch/836538/
> > > > > https://github.com/torvalds/linux/commit/c499696e7901bda18385ac723b7bd27c3a4af624#diff-a2b6f8d89e18de600e873ac3ac43fa1d
> > > > >
> > > > >
> > > > > Florians comment:
> > > > >
> > > > > c499696e7901bda18385ac723b7bd27c3a4af624 ("net: dsa: b53: Stop using
> > > > > dev->cpu_port incorrectly") since it would result in no longer setting
> > > > > the CPU port as tagged for a specific VLAN. Easiest way for you right
> > > > > now is to just revert it, but this needs some more thoughts for a
> > > > > proper
> > > > > upstream change. I will think about it some more.
> > > > Can confirm 4.14.18-200.fc26.armv7hl works, 4.15.x should be broken.
> > > >
> > > > # Kernel 4.14.x ok
> > > > https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/log/drivers/net/dsa/b53?h=v4.14.43
> > > >
> > > > # Kernel 4.15.x should be NOT ok
> > > > https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/log/drivers/net/dsa/b53?h=v4.15.18
> > Forgot to mention: What's also strange is that the VLAN ID is very high:
> >
> > # 4.14.18-300.fc27.armv7hl, iproute-4.15.0-1.fc28.armv7hl
> > ip -d link show eth0.101 | grep "vlan protocol"
> >  ÂÂÂ vlan protocol 802.1Q id 3069279796 <REORDER_HDR>
> > ip -d link show eth0.102 | grep "vlan protocol"
> >  ÂÂÂ vlan protocol 802.1Q id 3068673588 <REORDER_HDR>
> >
> > On older kernels this looks ok: 4.12.8-200.fc25.armv7hl,
> > iproute-4.11.0-1.fc25.armv7hl:
> >  Âip -d link show eth0.101 | grep "vlan protocol"
> >  ÂÂÂ vlan protocol 802.1Q id 101 <REORDER_HDR>
> > ip -d link show eth0.102 | grep "vlan protocol"
> >  ÂÂÂ vlan protocol 802.1Q id 102 <REORDER_HDR>
> >
> > Ideas?
> That is quite likely a kernel/iproute2 issue, if you configured the
> switch through bridge vlan to have the ports in VLAN 101 and VLAN 102
> and you do indeed see frames entering eth0 with these VLAN IDs, then
> clearly the bridge -> switchdev -> dsa -> b53 part is working just fine
> and what you are seeing is some for of kernel header/netlink
> incompatibility.

Yes, sniffing on eth0 shows the correct VLAN IDs, e.g. 101.

Yes, my guess is that tools are wrong and have random values on 2 calls 
in different values (e.g. alsopromiscuity ) , see below ....

Who can fix it?

BTW: On FC27 same issue with same kernel version, but guess older 
iproute version.

Ciao,

Gerhard


ip -d link show eth0.101

13: eth0.101@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc 
noqueue master br0 state UP mode DEFAULT group default qlen 1000
ÂÂÂ link/ether 02:18:09:ab:cd:ef brd ff:ff:ff:ff:ff:ff promiscuity 
3068661300
ÂÂÂ vlan protocol 802.1Q id 3068661300 <REORDER_HDR>
ÂÂÂ bridge_slave state forwarding priority 32 cost 4 hairpin off guard 
off root_block off fastleave off learning on flood on port_id 0x8005 
port_no 0x5 designa
ted_port 3068661300 designated_cost 3068661300 designated_bridge 
8000.66:5d:a2:ab:cd:ef designated_root 8000.66:5d:a2:ab:cd:ef 
hold_timerÂÂÂ 0.00 message_age_tim
erÂÂÂ 0.00 forward_delay_timerÂÂÂ 0.00 topology_change_ack 3068661300 
config_pending 3068661300 proxy_arp off proxy_arp_wifi off mcast_router 
3068661300 mcast_
fast_leave off mcast_flood on vlan_tunnel off addrgenmode eui64 
numtxqueues 3068661300 numrxqueues 3068661300 gso_max_size 3068661300 
gso_max_segs 3068661300

ip -d link show eth0.101
13: eth0.101@eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc 
noqueue master br0 state UP mode DEFAULT group default qlen 1000
ÂÂÂ link/ether 02:18:09:ab:cd:ef brd ff:ff:ff:ff:ff:ff promiscuity 
3068735028
ÂÂÂ vlan protocol 802.1Q id 3068735028 <REORDER_HDR>
ÂÂÂ bridge_slave state forwarding priority 32 cost 4 hairpin off guard 
off root_block off fastleave off learning on flood on port_id 0x8005 
port_no 0x5 designa
ted_port 3068735028 designated_cost 3068735028 designated_bridge 
8000.66:5d:ab:cd:ef designated_root 8000.66:5d:a2:ab:cd:ef hold_timerÂÂÂ 
0.00 message_age_tim
erÂÂÂ 0.00 forward_delay_timerÂÂÂ 0.00 topology_change_ack 3068735028 
config_pending 3068735028 proxy_arp off proxy_arp_wifi off mcast_router 
3068735028 mcast_
fast_leave off mcast_flood on vlan_tunnel off addrgenmode eui64 
numtxqueues 3068735028 numrxqueues 3068735028 gso_max_size 3068735028 
gso_max_segs 3068735028