| Message ID | 20200901195415.4840-1-m-karicheri2@ti.com |
|---|---|
| Headers | show |
| Series | Support for VLAN interface over HSR/PRP | expand |
All, On 9/1/20 3:54 PM, Murali Karicheri wrote: > This series add support for creating VLAN interface over HSR or > PRP interface. Typically industrial networks uses VLAN in > deployment and this capability is needed to support these > networks. > > This is tested using two TI AM572x IDK boards connected back > to back over CPSW ports (eth0 and eth1). > > Following is the setup > > Physical Setup > ++++++++++++++ > > _______________ (CPSW) _______________ > | |----eth0-----| | > |TI AM572x IDK1| | TI AM572x IDK2| > |______________|----eth1-----|_______________| > > > Network Topolgy > +++++++++++++++ > > TI AM571x IDK TI AM572x IDK > > > 192.168.100.10 CPSW ports 192.168.100.20 > IDK-1 IDK-2 > hsr0/prp0.100--| 192.168.2.10 |--eth0--| 192.168.2.20 |--hsr0/prp0.100 > |----hsr0/prp0--| |---hsr0/prp0--| > hsr0/prp0.101--| |--eth1--| |--hsr0/prp0/101 > > 192.168.101.10 192.168.101.20 > > Following tests:- > - create hsr or prp interface and ping the interface IP address > and verify ping is successful. > - Create 2 VLANs over hsr or prp interface on both IDKs (VID 100 and > 101). Ping between the IP address of the VLAN interfaces > - Do iperf UDP traffic test with server on one IDK and client on the > other. Do this using 100 and 101 subnet IP addresses > - Dump /proc/net/vlan/{hsr|prp}0.100 and verify frames are transmitted > and received at these interfaces. > - Delete the vlan and hsr/prp interface and verify interfaces are > removed cleanly. > > Logs for IDK-1 at https://pastebin.ubuntu.com/p/NxF83yZFDX/ > Logs for IDK-2 at https://pastebin.ubuntu.com/p/YBXBcsPgVK/ > > Murali Karicheri (1): > net: hsr/prp: add vlan support > > net/hsr/hsr_device.c | 4 ---- > net/hsr/hsr_forward.c | 16 +++++++++++++--- > 2 files changed, 13 insertions(+), 7 deletions(-) > I am not sure if the packet flow is right for this? VLAN over HSR frame format is like this. <Start of Frame><VLAN tag><HSR Tag><IP><CRC> My ifconfig stats shows both hsr and hsr0.100 interfaces receiving frames. So I did a WARN_ON() in HSR driver before frame is forwarded to upper layer. a0868495local@uda0868495:~/Projects/upstream-kernel$ git diff diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c index de21df30b0d9..545a3cd8c71b 100644 --- a/net/hsr/hsr_forward.c +++ b/net/hsr/hsr_forward.c @@ -415,9 +415,11 @@ static void hsr_forward_do(struct hsr_frame_info *frame) } skb->dev = port->dev; - if (port->type == HSR_PT_MASTER) + if (port->type == HSR_PT_MASTER) { + if (skb_vlan_tag_present(skb)) + WARN_ON(1); hsr_deliver_master(skb, port->dev, frame->node_src); - else + } else hsr_xmit(skb, port, frame); } } And I get the trace shown below. [ 275.125431] WARNING: CPU: 0 PID: 0 at net/hsr/hsr_forward.c:420 hsr_forward_skb+0x460/0x564 [ 275.133822] Modules linked in: snd_soc_omap_hdmi snd_soc_ti_sdma snd_soc_core snd_pcm_dmaengine snd_pcm snd_time4 [ 275.199705] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W 5.9.0-rc1-00658-g473e463812c2-dirty #8 [ 275.209573] Hardware name: Generic DRA74X (Flattened Device Tree) [ 275.215703] [<c011177c>] (unwind_backtrace) from [<c010b6f0>] (show_stack+0x10/0x14) [ 275.223487] [<c010b6f0>] (show_stack) from [<c055690c>] (dump_stack+0xc4/0xe4) [ 275.230747] [<c055690c>] (dump_stack) from [<c01386ac>] (__warn+0xc0/0xf4) [ 275.237656] [<c01386ac>] (__warn) from [<c0138a3c>] (warn_slowpath_fmt+0x58/0xb8) [ 275.245177] [<c0138a3c>] (warn_slowpath_fmt) from [<c09564bc>] (hsr_forward_skb+0x460/0x564) [ 275.253657] [<c09564bc>] (hsr_forward_skb) from [<c0955534>] (hsr_handle_frame+0x15c/0x190) [ 275.262047] [<c0955534>] (hsr_handle_frame) from [<c07c6704>] (__netif_receive_skb_core+0x23c/0xc88) [ 275.271223] [<c07c6704>] (__netif_receive_skb_core) from [<c07c7180>] (__netif_receive_skb_one_core+0x30/0x74) [ 275.281266] [<c07c7180>] (__netif_receive_skb_one_core) from [<c07c72a4>] (netif_receive_skb+0x50/0x1c4) [ 275.290793] [<c07c72a4>] (netif_receive_skb) from [<c071a55c>] (cpsw_rx_handler+0x230/0x308) [ 275.299272] [<c071a55c>] (cpsw_rx_handler) from [<c0715ee8>] (__cpdma_chan_process+0xf4/0x188) [ 275.307925] [<c0715ee8>] (__cpdma_chan_process) from [<c0717294>] (cpdma_chan_process+0x3c/0x5c) [ 275.316754] [<c0717294>] (cpdma_chan_process) from [<c071dd14>] (cpsw_rx_mq_poll+0x44/0x98) [ 275.325145] [<c071dd14>] (cpsw_rx_mq_poll) from [<c07c8ae0>] (net_rx_action+0xf0/0x400) [ 275.333185] [<c07c8ae0>] (net_rx_action) from [<c0101370>] (__do_softirq+0xf0/0x3ac) [ 275.340965] [<c0101370>] (__do_softirq) from [<c013f5ec>] (irq_exit+0xa8/0xe4) [ 275.348224] [<c013f5ec>] (irq_exit) from [<c0199344>] (__handle_domain_irq+0x6c/0xe0) [ 275.356093] [<c0199344>] (__handle_domain_irq) from [<c056f8fc>] (gic_handle_irq+0x4c/0xa8) [ 275.364481] [<c056f8fc>] (gic_handle_irq) from [<c0100b6c>] (__irq_svc+0x6c/0x90) [ 275.371996] Exception stack(0xc0e01f18 to 0xc0e01f60) Shouldn't it show vlan_do_receive() ? if (skb_vlan_tag_present(skb)) { if (pt_prev) { ret = deliver_skb(skb, pt_prev, orig_dev); pt_prev = NULL; } if (vlan_do_receive(&skb)) goto another_round; else if (unlikely(!skb)) goto out; } Thanks -- Murali Karicheri Texas Instruments
All, On 9/2/20 12:14 PM, Murali Karicheri wrote: > All, > > On 9/1/20 3:54 PM, Murali Karicheri wrote: >> This series add support for creating VLAN interface over HSR or >> PRP interface. Typically industrial networks uses VLAN in >> deployment and this capability is needed to support these >> networks. >> >> This is tested using two TI AM572x IDK boards connected back >> to back over CPSW ports (eth0 and eth1). >> >> Following is the setup >> >> Physical Setup >> ++++++++++++++ >> _______________ (CPSW) _______________ >> | |----eth0-----| | >> |TI AM572x IDK1| | TI AM572x IDK2| >> |______________|----eth1-----|_______________| >> >> >> Network Topolgy >> +++++++++++++++ >> >> TI AM571x IDK TI AM572x IDK >> >> 192.168.100.10 CPSW ports 192.168.100.20 >> IDK-1 IDK-2 >> hsr0/prp0.100--| 192.168.2.10 |--eth0--| 192.168.2.20 |--hsr0/prp0.100 >> |----hsr0/prp0--| |---hsr0/prp0--| >> hsr0/prp0.101--| |--eth1--| |--hsr0/prp0/101 >> >> 192.168.101.10 192.168.101.20 >> >> Following tests:- >> - create hsr or prp interface and ping the interface IP address >> and verify ping is successful. >> - Create 2 VLANs over hsr or prp interface on both IDKs (VID 100 and >> 101). Ping between the IP address of the VLAN interfaces >> - Do iperf UDP traffic test with server on one IDK and client on the >> other. Do this using 100 and 101 subnet IP addresses >> - Dump /proc/net/vlan/{hsr|prp}0.100 and verify frames are transmitted >> and received at these interfaces. >> - Delete the vlan and hsr/prp interface and verify interfaces are >> removed cleanly. >> >> Logs for IDK-1 at https://pastebin.ubuntu.com/p/NxF83yZFDX/ >> Logs for IDK-2 at https://pastebin.ubuntu.com/p/YBXBcsPgVK/ >> >> Murali Karicheri (1): >> net: hsr/prp: add vlan support >> >> net/hsr/hsr_device.c | 4 ---- >> net/hsr/hsr_forward.c | 16 +++++++++++++--- >> 2 files changed, 13 insertions(+), 7 deletions(-) >> > I am not sure if the packet flow is right for this? > > VLAN over HSR frame format is like this. > > <Start of Frame><VLAN tag><HSR Tag><IP><CRC> > > My ifconfig stats shows both hsr and hsr0.100 interfaces receiving > frames. > > So I did a WARN_ON() in HSR driver before frame is forwarded to upper > layer. > > a0868495local@uda0868495:~/Projects/upstream-kernel$ git diff > diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c > index de21df30b0d9..545a3cd8c71b 100644 > --- a/net/hsr/hsr_forward.c > +++ b/net/hsr/hsr_forward.c > @@ -415,9 +415,11 @@ static void hsr_forward_do(struct hsr_frame_info > *frame) > } > > skb->dev = port->dev; > - if (port->type == HSR_PT_MASTER) > + if (port->type == HSR_PT_MASTER) { > + if (skb_vlan_tag_present(skb)) > + WARN_ON(1); > hsr_deliver_master(skb, port->dev, > frame->node_src); > - else > + } else > hsr_xmit(skb, port, frame); > } > } > > And I get the trace shown below. > > [ 275.125431] WARNING: CPU: 0 PID: 0 at net/hsr/hsr_forward.c:420 > hsr_forward_skb+0x460/0x564 > [ 275.133822] Modules linked in: snd_soc_omap_hdmi snd_soc_ti_sdma > snd_soc_core snd_pcm_dmaengine snd_pcm snd_time4 > [ 275.199705] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W > 5.9.0-rc1-00658-g473e463812c2-dirty #8 > [ 275.209573] Hardware name: Generic DRA74X (Flattened Device Tree) > [ 275.215703] [<c011177c>] (unwind_backtrace) from [<c010b6f0>] > (show_stack+0x10/0x14) > [ 275.223487] [<c010b6f0>] (show_stack) from [<c055690c>] > (dump_stack+0xc4/0xe4) > [ 275.230747] [<c055690c>] (dump_stack) from [<c01386ac>] > (__warn+0xc0/0xf4) > [ 275.237656] [<c01386ac>] (__warn) from [<c0138a3c>] > (warn_slowpath_fmt+0x58/0xb8) > [ 275.245177] [<c0138a3c>] (warn_slowpath_fmt) from [<c09564bc>] > (hsr_forward_skb+0x460/0x564) > [ 275.253657] [<c09564bc>] (hsr_forward_skb) from [<c0955534>] > (hsr_handle_frame+0x15c/0x190) > [ 275.262047] [<c0955534>] (hsr_handle_frame) from [<c07c6704>] > (__netif_receive_skb_core+0x23c/0xc88) > [ 275.271223] [<c07c6704>] (__netif_receive_skb_core) from [<c07c7180>] > (__netif_receive_skb_one_core+0x30/0x74) > [ 275.281266] [<c07c7180>] (__netif_receive_skb_one_core) from > [<c07c72a4>] (netif_receive_skb+0x50/0x1c4) > [ 275.290793] [<c07c72a4>] (netif_receive_skb) from [<c071a55c>] > (cpsw_rx_handler+0x230/0x308) > [ 275.299272] [<c071a55c>] (cpsw_rx_handler) from [<c0715ee8>] > (__cpdma_chan_process+0xf4/0x188) > [ 275.307925] [<c0715ee8>] (__cpdma_chan_process) from [<c0717294>] > (cpdma_chan_process+0x3c/0x5c) > [ 275.316754] [<c0717294>] (cpdma_chan_process) from [<c071dd14>] > (cpsw_rx_mq_poll+0x44/0x98) > [ 275.325145] [<c071dd14>] (cpsw_rx_mq_poll) from [<c07c8ae0>] > (net_rx_action+0xf0/0x400) > [ 275.333185] [<c07c8ae0>] (net_rx_action) from [<c0101370>] > (__do_softirq+0xf0/0x3ac) > [ 275.340965] [<c0101370>] (__do_softirq) from [<c013f5ec>] > (irq_exit+0xa8/0xe4) > [ 275.348224] [<c013f5ec>] (irq_exit) from [<c0199344>] > (__handle_domain_irq+0x6c/0xe0) > [ 275.356093] [<c0199344>] (__handle_domain_irq) from [<c056f8fc>] > (gic_handle_irq+0x4c/0xa8) > [ 275.364481] [<c056f8fc>] (gic_handle_irq) from [<c0100b6c>] > (__irq_svc+0x6c/0x90) > [ 275.371996] Exception stack(0xc0e01f18 to 0xc0e01f60) > > Shouldn't it show vlan_do_receive() ? > > if (skb_vlan_tag_present(skb)) { > if (pt_prev) { > ret = deliver_skb(skb, pt_prev, orig_dev); > pt_prev = NULL; > } > if (vlan_do_receive(&skb)) > goto another_round; > else if (unlikely(!skb)) > goto out; > } > > Thanks > I did an ftrace today and I find vlan_do_receive() is called for the incoming frames before passing SKB to hsr_handle_frame(). If someone can review this, it will help. Thanks. https://pastebin.ubuntu.com/p/CbRzXjwjR5/ -- Murali Karicheri Texas Instruments
On Thu, Sep 3, 2020 at 12:30 AM Murali Karicheri <m-karicheri2@ti.com> wrote: > > All, > > On 9/2/20 12:14 PM, Murali Karicheri wrote: > > All, > > > > On 9/1/20 3:54 PM, Murali Karicheri wrote: > >> This series add support for creating VLAN interface over HSR or > >> PRP interface. Typically industrial networks uses VLAN in > >> deployment and this capability is needed to support these > >> networks. > >> > >> This is tested using two TI AM572x IDK boards connected back > >> to back over CPSW ports (eth0 and eth1). > >> > >> Following is the setup > >> > >> Physical Setup > >> ++++++++++++++ > >> _______________ (CPSW) _______________ > >> | |----eth0-----| | > >> |TI AM572x IDK1| | TI AM572x IDK2| > >> |______________|----eth1-----|_______________| > >> > >> > >> Network Topolgy > >> +++++++++++++++ > >> > >> TI AM571x IDK TI AM572x IDK > >> > >> 192.168.100.10 CPSW ports 192.168.100.20 > >> IDK-1 IDK-2 > >> hsr0/prp0.100--| 192.168.2.10 |--eth0--| 192.168.2.20 |--hsr0/prp0.100 > >> |----hsr0/prp0--| |---hsr0/prp0--| > >> hsr0/prp0.101--| |--eth1--| |--hsr0/prp0/101 > >> > >> 192.168.101.10 192.168.101.20 > >> > >> Following tests:- > >> - create hsr or prp interface and ping the interface IP address > >> and verify ping is successful. > >> - Create 2 VLANs over hsr or prp interface on both IDKs (VID 100 and > >> 101). Ping between the IP address of the VLAN interfaces > >> - Do iperf UDP traffic test with server on one IDK and client on the > >> other. Do this using 100 and 101 subnet IP addresses > >> - Dump /proc/net/vlan/{hsr|prp}0.100 and verify frames are transmitted > >> and received at these interfaces. > >> - Delete the vlan and hsr/prp interface and verify interfaces are > >> removed cleanly. > >> > >> Logs for IDK-1 at https://pastebin.ubuntu.com/p/NxF83yZFDX/ > >> Logs for IDK-2 at https://pastebin.ubuntu.com/p/YBXBcsPgVK/ > >> > >> Murali Karicheri (1): > >> net: hsr/prp: add vlan support > >> > >> net/hsr/hsr_device.c | 4 ---- > >> net/hsr/hsr_forward.c | 16 +++++++++++++--- > >> 2 files changed, 13 insertions(+), 7 deletions(-) > >> > > I am not sure if the packet flow is right for this? > > > > VLAN over HSR frame format is like this. > > > > <Start of Frame><VLAN tag><HSR Tag><IP><CRC> > > > > My ifconfig stats shows both hsr and hsr0.100 interfaces receiving > > frames. > > > > So I did a WARN_ON() in HSR driver before frame is forwarded to upper > > layer. > > > > a0868495local@uda0868495:~/Projects/upstream-kernel$ git diff > > diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c > > index de21df30b0d9..545a3cd8c71b 100644 > > --- a/net/hsr/hsr_forward.c > > +++ b/net/hsr/hsr_forward.c > > @@ -415,9 +415,11 @@ static void hsr_forward_do(struct hsr_frame_info > > *frame) > > } > > > > skb->dev = port->dev; > > - if (port->type == HSR_PT_MASTER) > > + if (port->type == HSR_PT_MASTER) { > > + if (skb_vlan_tag_present(skb)) > > + WARN_ON(1); > > hsr_deliver_master(skb, port->dev, > > frame->node_src); > > - else > > + } else > > hsr_xmit(skb, port, frame); > > } > > } > > > > And I get the trace shown below. > > > > [ 275.125431] WARNING: CPU: 0 PID: 0 at net/hsr/hsr_forward.c:420 > > hsr_forward_skb+0x460/0x564 > > [ 275.133822] Modules linked in: snd_soc_omap_hdmi snd_soc_ti_sdma > > snd_soc_core snd_pcm_dmaengine snd_pcm snd_time4 > > [ 275.199705] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W > > 5.9.0-rc1-00658-g473e463812c2-dirty #8 > > [ 275.209573] Hardware name: Generic DRA74X (Flattened Device Tree) > > [ 275.215703] [<c011177c>] (unwind_backtrace) from [<c010b6f0>] > > (show_stack+0x10/0x14) > > [ 275.223487] [<c010b6f0>] (show_stack) from [<c055690c>] > > (dump_stack+0xc4/0xe4) > > [ 275.230747] [<c055690c>] (dump_stack) from [<c01386ac>] > > (__warn+0xc0/0xf4) > > [ 275.237656] [<c01386ac>] (__warn) from [<c0138a3c>] > > (warn_slowpath_fmt+0x58/0xb8) > > [ 275.245177] [<c0138a3c>] (warn_slowpath_fmt) from [<c09564bc>] > > (hsr_forward_skb+0x460/0x564) > > [ 275.253657] [<c09564bc>] (hsr_forward_skb) from [<c0955534>] > > (hsr_handle_frame+0x15c/0x190) > > [ 275.262047] [<c0955534>] (hsr_handle_frame) from [<c07c6704>] > > (__netif_receive_skb_core+0x23c/0xc88) > > [ 275.271223] [<c07c6704>] (__netif_receive_skb_core) from [<c07c7180>] > > (__netif_receive_skb_one_core+0x30/0x74) > > [ 275.281266] [<c07c7180>] (__netif_receive_skb_one_core) from > > [<c07c72a4>] (netif_receive_skb+0x50/0x1c4) > > [ 275.290793] [<c07c72a4>] (netif_receive_skb) from [<c071a55c>] > > (cpsw_rx_handler+0x230/0x308) > > [ 275.299272] [<c071a55c>] (cpsw_rx_handler) from [<c0715ee8>] > > (__cpdma_chan_process+0xf4/0x188) > > [ 275.307925] [<c0715ee8>] (__cpdma_chan_process) from [<c0717294>] > > (cpdma_chan_process+0x3c/0x5c) > > [ 275.316754] [<c0717294>] (cpdma_chan_process) from [<c071dd14>] > > (cpsw_rx_mq_poll+0x44/0x98) > > [ 275.325145] [<c071dd14>] (cpsw_rx_mq_poll) from [<c07c8ae0>] > > (net_rx_action+0xf0/0x400) > > [ 275.333185] [<c07c8ae0>] (net_rx_action) from [<c0101370>] > > (__do_softirq+0xf0/0x3ac) > > [ 275.340965] [<c0101370>] (__do_softirq) from [<c013f5ec>] > > (irq_exit+0xa8/0xe4) > > [ 275.348224] [<c013f5ec>] (irq_exit) from [<c0199344>] > > (__handle_domain_irq+0x6c/0xe0) > > [ 275.356093] [<c0199344>] (__handle_domain_irq) from [<c056f8fc>] > > (gic_handle_irq+0x4c/0xa8) > > [ 275.364481] [<c056f8fc>] (gic_handle_irq) from [<c0100b6c>] > > (__irq_svc+0x6c/0x90) > > [ 275.371996] Exception stack(0xc0e01f18 to 0xc0e01f60) > > > > Shouldn't it show vlan_do_receive() ? > > > > if (skb_vlan_tag_present(skb)) { > > if (pt_prev) { > > ret = deliver_skb(skb, pt_prev, orig_dev); > > pt_prev = NULL; > > } > > if (vlan_do_receive(&skb)) > > goto another_round; > > else if (unlikely(!skb)) > > goto out; > > } > > > > Thanks > > > > I did an ftrace today and I find vlan_do_receive() is called for the > incoming frames before passing SKB to hsr_handle_frame(). If someone > can review this, it will help. Thanks. > > https://pastebin.ubuntu.com/p/CbRzXjwjR5/ hsr_handle_frame is an rx_handler called after __netif_receive_skb_core called vlan_do_receive and jumped back to another_round. That's how it should work right?
Hi Willem, On 9/4/20 11:52 AM, Willem de Bruijn wrote: > On Thu, Sep 3, 2020 at 12:30 AM Murali Karicheri <m-karicheri2@ti.com> wrote: >> >> All, >> >> On 9/2/20 12:14 PM, Murali Karicheri wrote: >>> All, >>> >>> On 9/1/20 3:54 PM, Murali Karicheri wrote: >>>> This series add support for creating VLAN interface over HSR or >>>> PRP interface. Typically industrial networks uses VLAN in >>>> deployment and this capability is needed to support these >>>> networks. >>>> >>>> This is tested using two TI AM572x IDK boards connected back >>>> to back over CPSW ports (eth0 and eth1). >>>> >>>> Following is the setup >>>> >>>> Physical Setup >>>> ++++++++++++++ >>>> _______________ (CPSW) _______________ >>>> | |----eth0-----| | >>>> |TI AM572x IDK1| | TI AM572x IDK2| >>>> |______________|----eth1-----|_______________| >>>> >>>> >>>> Network Topolgy >>>> +++++++++++++++ >>>> >>>> TI AM571x IDK TI AM572x IDK >>>> >>>> 192.168.100.10 CPSW ports 192.168.100.20 >>>> IDK-1 IDK-2 >>>> hsr0/prp0.100--| 192.168.2.10 |--eth0--| 192.168.2.20 |--hsr0/prp0.100 >>>> |----hsr0/prp0--| |---hsr0/prp0--| >>>> hsr0/prp0.101--| |--eth1--| |--hsr0/prp0/101 >>>> >>>> 192.168.101.10 192.168.101.20 >>>> >>>> Following tests:- >>>> - create hsr or prp interface and ping the interface IP address >>>> and verify ping is successful. >>>> - Create 2 VLANs over hsr or prp interface on both IDKs (VID 100 and >>>> 101). Ping between the IP address of the VLAN interfaces >>>> - Do iperf UDP traffic test with server on one IDK and client on the >>>> other. Do this using 100 and 101 subnet IP addresses >>>> - Dump /proc/net/vlan/{hsr|prp}0.100 and verify frames are transmitted >>>> and received at these interfaces. >>>> - Delete the vlan and hsr/prp interface and verify interfaces are >>>> removed cleanly. >>>> >>>> Logs for IDK-1 at https://pastebin.ubuntu.com/p/NxF83yZFDX/ >>>> Logs for IDK-2 at https://pastebin.ubuntu.com/p/YBXBcsPgVK/ >>>> >>>> Murali Karicheri (1): >>>> net: hsr/prp: add vlan support >>>> >>>> net/hsr/hsr_device.c | 4 ---- >>>> net/hsr/hsr_forward.c | 16 +++++++++++++--- >>>> 2 files changed, 13 insertions(+), 7 deletions(-) >>>> >>> I am not sure if the packet flow is right for this? >>> >>> VLAN over HSR frame format is like this. >>> >>> <Start of Frame><VLAN tag><HSR Tag><IP><CRC> >>> >>> My ifconfig stats shows both hsr and hsr0.100 interfaces receiving >>> frames. >>> >>> So I did a WARN_ON() in HSR driver before frame is forwarded to upper >>> layer. >>> >>> a0868495local@uda0868495:~/Projects/upstream-kernel$ git diff >>> diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c >>> index de21df30b0d9..545a3cd8c71b 100644 >>> --- a/net/hsr/hsr_forward.c >>> +++ b/net/hsr/hsr_forward.c >>> @@ -415,9 +415,11 @@ static void hsr_forward_do(struct hsr_frame_info >>> *frame) >>> } >>> >>> skb->dev = port->dev; >>> - if (port->type == HSR_PT_MASTER) >>> + if (port->type == HSR_PT_MASTER) { >>> + if (skb_vlan_tag_present(skb)) >>> + WARN_ON(1); >>> hsr_deliver_master(skb, port->dev, >>> frame->node_src); >>> - else >>> + } else >>> hsr_xmit(skb, port, frame); >>> } >>> } >>> >>> And I get the trace shown below. >>> >>> [ 275.125431] WARNING: CPU: 0 PID: 0 at net/hsr/hsr_forward.c:420 >>> hsr_forward_skb+0x460/0x564 >>> [ 275.133822] Modules linked in: snd_soc_omap_hdmi snd_soc_ti_sdma >>> snd_soc_core snd_pcm_dmaengine snd_pcm snd_time4 >>> [ 275.199705] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W >>> 5.9.0-rc1-00658-g473e463812c2-dirty #8 >>> [ 275.209573] Hardware name: Generic DRA74X (Flattened Device Tree) >>> [ 275.215703] [<c011177c>] (unwind_backtrace) from [<c010b6f0>] >>> (show_stack+0x10/0x14) >>> [ 275.223487] [<c010b6f0>] (show_stack) from [<c055690c>] >>> (dump_stack+0xc4/0xe4) >>> [ 275.230747] [<c055690c>] (dump_stack) from [<c01386ac>] >>> (__warn+0xc0/0xf4) >>> [ 275.237656] [<c01386ac>] (__warn) from [<c0138a3c>] >>> (warn_slowpath_fmt+0x58/0xb8) >>> [ 275.245177] [<c0138a3c>] (warn_slowpath_fmt) from [<c09564bc>] >>> (hsr_forward_skb+0x460/0x564) >>> [ 275.253657] [<c09564bc>] (hsr_forward_skb) from [<c0955534>] >>> (hsr_handle_frame+0x15c/0x190) >>> [ 275.262047] [<c0955534>] (hsr_handle_frame) from [<c07c6704>] >>> (__netif_receive_skb_core+0x23c/0xc88) >>> [ 275.271223] [<c07c6704>] (__netif_receive_skb_core) from [<c07c7180>] >>> (__netif_receive_skb_one_core+0x30/0x74) >>> [ 275.281266] [<c07c7180>] (__netif_receive_skb_one_core) from >>> [<c07c72a4>] (netif_receive_skb+0x50/0x1c4) >>> [ 275.290793] [<c07c72a4>] (netif_receive_skb) from [<c071a55c>] >>> (cpsw_rx_handler+0x230/0x308) >>> [ 275.299272] [<c071a55c>] (cpsw_rx_handler) from [<c0715ee8>] >>> (__cpdma_chan_process+0xf4/0x188) >>> [ 275.307925] [<c0715ee8>] (__cpdma_chan_process) from [<c0717294>] >>> (cpdma_chan_process+0x3c/0x5c) >>> [ 275.316754] [<c0717294>] (cpdma_chan_process) from [<c071dd14>] >>> (cpsw_rx_mq_poll+0x44/0x98) >>> [ 275.325145] [<c071dd14>] (cpsw_rx_mq_poll) from [<c07c8ae0>] >>> (net_rx_action+0xf0/0x400) >>> [ 275.333185] [<c07c8ae0>] (net_rx_action) from [<c0101370>] >>> (__do_softirq+0xf0/0x3ac) >>> [ 275.340965] [<c0101370>] (__do_softirq) from [<c013f5ec>] >>> (irq_exit+0xa8/0xe4) >>> [ 275.348224] [<c013f5ec>] (irq_exit) from [<c0199344>] >>> (__handle_domain_irq+0x6c/0xe0) >>> [ 275.356093] [<c0199344>] (__handle_domain_irq) from [<c056f8fc>] >>> (gic_handle_irq+0x4c/0xa8) >>> [ 275.364481] [<c056f8fc>] (gic_handle_irq) from [<c0100b6c>] >>> (__irq_svc+0x6c/0x90) >>> [ 275.371996] Exception stack(0xc0e01f18 to 0xc0e01f60) >>> >>> Shouldn't it show vlan_do_receive() ? >>> >>> if (skb_vlan_tag_present(skb)) { >>> if (pt_prev) { >>> ret = deliver_skb(skb, pt_prev, orig_dev); >>> pt_prev = NULL; >>> } >>> if (vlan_do_receive(&skb)) >>> goto another_round; >>> else if (unlikely(!skb)) >>> goto out; >>> } >>> >>> Thanks >>> >> >> I did an ftrace today and I find vlan_do_receive() is called for the >> incoming frames before passing SKB to hsr_handle_frame(). If someone >> can review this, it will help. Thanks. >> >> https://pastebin.ubuntu.com/p/CbRzXjwjR5/ > > hsr_handle_frame is an rx_handler called after > __netif_receive_skb_core called vlan_do_receive and jumped back to > another_round. Yes. hsr_handle_frame() is a rx_handler() after the above code that does vlan_do_receive(). The ftrace shows vlan_do_receive() is called followed by call to hsr_handle_frame(). From ifconfig I can see both hsr and vlan interface stats increments by same count. So I assume, vlan_do_receive() is called initially and it removes the tag, update stats and then return true and go for another round. Do you think that is the case? vlan_do_receive() calls vlan_find_dev(skb->dev, vlan_proto, vlan_id) to retrieve the real netdevice (real device). However VLAN device is attached to hsr device (real device), but SKB will have HSR slave Ethernet netdevice (in our case it is cpsw device) and vlan_find_dev() would have failed since there is no vlan_info in cpsw netdev struct. So below code in vlan_do_receive() should have failed and return false. vlan_dev = vlan_find_dev(skb->dev, vlan_proto, vlan_id); if (!vlan_dev) return false; So how does it goes for another_round ? May be vlan_find_dev is finding the hsr netdevice? I am not an expert and so the question. Probably I can put a traceprintk() to confirm this, but if someone can clarify this it will be great. But for that, I will spin v2 with the above comments addressed as in my reply and post. Thanks > > That's how it should work right? > -- Murali Karicheri Texas Instruments
On Tue, Sep 8, 2020 at 6:55 PM Murali Karicheri <m-karicheri2@ti.com> wrote: > > Hi Willem, > > On 9/4/20 11:52 AM, Willem de Bruijn wrote: > > On Thu, Sep 3, 2020 at 12:30 AM Murali Karicheri <m-karicheri2@ti.com> wrote: > >> > >> All, > >> > >> On 9/2/20 12:14 PM, Murali Karicheri wrote: > >>> All, > >>> > >>> On 9/1/20 3:54 PM, Murali Karicheri wrote: > >>>> This series add support for creating VLAN interface over HSR or > >>>> PRP interface. Typically industrial networks uses VLAN in > >>>> deployment and this capability is needed to support these > >>>> networks. > >>>> > >>>> This is tested using two TI AM572x IDK boards connected back > >>>> to back over CPSW ports (eth0 and eth1). > >>>> > >>>> Following is the setup > >>>> > >>>> Physical Setup > >>>> ++++++++++++++ > >>>> _______________ (CPSW) _______________ > >>>> | |----eth0-----| | > >>>> |TI AM572x IDK1| | TI AM572x IDK2| > >>>> |______________|----eth1-----|_______________| > >>>> > >>>> > >>>> Network Topolgy > >>>> +++++++++++++++ > >>>> > >>>> TI AM571x IDK TI AM572x IDK > >>>> > >>>> 192.168.100.10 CPSW ports 192.168.100.20 > >>>> IDK-1 IDK-2 > >>>> hsr0/prp0.100--| 192.168.2.10 |--eth0--| 192.168.2.20 |--hsr0/prp0.100 > >>>> |----hsr0/prp0--| |---hsr0/prp0--| > >>>> hsr0/prp0.101--| |--eth1--| |--hsr0/prp0/101 > >>>> > >>>> 192.168.101.10 192.168.101.20 > >>>> > >>>> Following tests:- > >>>> - create hsr or prp interface and ping the interface IP address > >>>> and verify ping is successful. > >>>> - Create 2 VLANs over hsr or prp interface on both IDKs (VID 100 and > >>>> 101). Ping between the IP address of the VLAN interfaces > >>>> - Do iperf UDP traffic test with server on one IDK and client on the > >>>> other. Do this using 100 and 101 subnet IP addresses > >>>> - Dump /proc/net/vlan/{hsr|prp}0.100 and verify frames are transmitted > >>>> and received at these interfaces. > >>>> - Delete the vlan and hsr/prp interface and verify interfaces are > >>>> removed cleanly. > >>>> > >>>> Logs for IDK-1 at https://pastebin.ubuntu.com/p/NxF83yZFDX/ > >>>> Logs for IDK-2 at https://pastebin.ubuntu.com/p/YBXBcsPgVK/ > >>>> > >>>> Murali Karicheri (1): > >>>> net: hsr/prp: add vlan support > >>>> > >>>> net/hsr/hsr_device.c | 4 ---- > >>>> net/hsr/hsr_forward.c | 16 +++++++++++++--- > >>>> 2 files changed, 13 insertions(+), 7 deletions(-) > >>>> > >>> I am not sure if the packet flow is right for this? > >>> > >>> VLAN over HSR frame format is like this. > >>> > >>> <Start of Frame><VLAN tag><HSR Tag><IP><CRC> > >>> > >>> My ifconfig stats shows both hsr and hsr0.100 interfaces receiving > >>> frames. > >>> > >>> So I did a WARN_ON() in HSR driver before frame is forwarded to upper > >>> layer. > >>> > >>> a0868495local@uda0868495:~/Projects/upstream-kernel$ git diff > >>> diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c > >>> index de21df30b0d9..545a3cd8c71b 100644 > >>> --- a/net/hsr/hsr_forward.c > >>> +++ b/net/hsr/hsr_forward.c > >>> @@ -415,9 +415,11 @@ static void hsr_forward_do(struct hsr_frame_info > >>> *frame) > >>> } > >>> > >>> skb->dev = port->dev; > >>> - if (port->type == HSR_PT_MASTER) > >>> + if (port->type == HSR_PT_MASTER) { > >>> + if (skb_vlan_tag_present(skb)) > >>> + WARN_ON(1); > >>> hsr_deliver_master(skb, port->dev, > >>> frame->node_src); > >>> - else > >>> + } else > >>> hsr_xmit(skb, port, frame); > >>> } > >>> } > >>> > >>> And I get the trace shown below. > >>> > >>> [ 275.125431] WARNING: CPU: 0 PID: 0 at net/hsr/hsr_forward.c:420 > >>> hsr_forward_skb+0x460/0x564 > >>> [ 275.133822] Modules linked in: snd_soc_omap_hdmi snd_soc_ti_sdma > >>> snd_soc_core snd_pcm_dmaengine snd_pcm snd_time4 > >>> [ 275.199705] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W > >>> 5.9.0-rc1-00658-g473e463812c2-dirty #8 > >>> [ 275.209573] Hardware name: Generic DRA74X (Flattened Device Tree) > >>> [ 275.215703] [<c011177c>] (unwind_backtrace) from [<c010b6f0>] > >>> (show_stack+0x10/0x14) > >>> [ 275.223487] [<c010b6f0>] (show_stack) from [<c055690c>] > >>> (dump_stack+0xc4/0xe4) > >>> [ 275.230747] [<c055690c>] (dump_stack) from [<c01386ac>] > >>> (__warn+0xc0/0xf4) > >>> [ 275.237656] [<c01386ac>] (__warn) from [<c0138a3c>] > >>> (warn_slowpath_fmt+0x58/0xb8) > >>> [ 275.245177] [<c0138a3c>] (warn_slowpath_fmt) from [<c09564bc>] > >>> (hsr_forward_skb+0x460/0x564) > >>> [ 275.253657] [<c09564bc>] (hsr_forward_skb) from [<c0955534>] > >>> (hsr_handle_frame+0x15c/0x190) > >>> [ 275.262047] [<c0955534>] (hsr_handle_frame) from [<c07c6704>] > >>> (__netif_receive_skb_core+0x23c/0xc88) > >>> [ 275.271223] [<c07c6704>] (__netif_receive_skb_core) from [<c07c7180>] > >>> (__netif_receive_skb_one_core+0x30/0x74) > >>> [ 275.281266] [<c07c7180>] (__netif_receive_skb_one_core) from > >>> [<c07c72a4>] (netif_receive_skb+0x50/0x1c4) > >>> [ 275.290793] [<c07c72a4>] (netif_receive_skb) from [<c071a55c>] > >>> (cpsw_rx_handler+0x230/0x308) > >>> [ 275.299272] [<c071a55c>] (cpsw_rx_handler) from [<c0715ee8>] > >>> (__cpdma_chan_process+0xf4/0x188) > >>> [ 275.307925] [<c0715ee8>] (__cpdma_chan_process) from [<c0717294>] > >>> (cpdma_chan_process+0x3c/0x5c) > >>> [ 275.316754] [<c0717294>] (cpdma_chan_process) from [<c071dd14>] > >>> (cpsw_rx_mq_poll+0x44/0x98) > >>> [ 275.325145] [<c071dd14>] (cpsw_rx_mq_poll) from [<c07c8ae0>] > >>> (net_rx_action+0xf0/0x400) > >>> [ 275.333185] [<c07c8ae0>] (net_rx_action) from [<c0101370>] > >>> (__do_softirq+0xf0/0x3ac) > >>> [ 275.340965] [<c0101370>] (__do_softirq) from [<c013f5ec>] > >>> (irq_exit+0xa8/0xe4) > >>> [ 275.348224] [<c013f5ec>] (irq_exit) from [<c0199344>] > >>> (__handle_domain_irq+0x6c/0xe0) > >>> [ 275.356093] [<c0199344>] (__handle_domain_irq) from [<c056f8fc>] > >>> (gic_handle_irq+0x4c/0xa8) > >>> [ 275.364481] [<c056f8fc>] (gic_handle_irq) from [<c0100b6c>] > >>> (__irq_svc+0x6c/0x90) > >>> [ 275.371996] Exception stack(0xc0e01f18 to 0xc0e01f60) > >>> > >>> Shouldn't it show vlan_do_receive() ? > >>> > >>> if (skb_vlan_tag_present(skb)) { > >>> if (pt_prev) { > >>> ret = deliver_skb(skb, pt_prev, orig_dev); > >>> pt_prev = NULL; > >>> } > >>> if (vlan_do_receive(&skb)) > >>> goto another_round; > >>> else if (unlikely(!skb)) > >>> goto out; > >>> } > >>> > >>> Thanks > >>> > >> > >> I did an ftrace today and I find vlan_do_receive() is called for the > >> incoming frames before passing SKB to hsr_handle_frame(). If someone > >> can review this, it will help. Thanks. > >> > >> https://pastebin.ubuntu.com/p/CbRzXjwjR5/ > > > > hsr_handle_frame is an rx_handler called after > > __netif_receive_skb_core called vlan_do_receive and jumped back to > > another_round. > > Yes. hsr_handle_frame() is a rx_handler() after the above code that > does vlan_do_receive(). The ftrace shows vlan_do_receive() is called > followed by call to hsr_handle_frame(). From ifconfig I can see both > hsr and vlan interface stats increments by same count. So I assume, > vlan_do_receive() is called initially and it removes the tag, update > stats and then return true and go for another round. Do you think that > is the case? That was my understanding. > vlan_do_receive() calls vlan_find_dev(skb->dev, vlan_proto, vlan_id) > to retrieve the real netdevice (real device). However VLAN device is > attached to hsr device (real device), but SKB will have HSR slave > Ethernet netdevice (in our case it is cpsw device) and vlan_find_dev() > would have failed since there is no vlan_info in cpsw netdev struct. So > below code in vlan_do_receive() should have failed and return false. > > vlan_dev = vlan_find_dev(skb->dev, vlan_proto, vlan_id); > if (!vlan_dev) > return false; > > So how does it goes for another_round ? May be vlan_find_dev is > finding the hsr netdevice? It's good to answer this through code inspection and/or instrumentation. I do not have the answer immediately either. There certainly is prior art in having vlan with an rx_handler, judging from the netif_is_macvlan_port(vlan_dev) and netif_is_bridge_port(vlan_dev) helpers in vlan_do_receive. > I am not an expert and so the question. Probably I can put a > traceprintk() to confirm this, but if someone can clarify this > it will be great. But for that, I will spin v2 with the above comments > addressed as in my reply and post. Please don't send a patch before we understand this part.
> > >>> > > >>> Shouldn't it show vlan_do_receive() ? > > >>> > > >>> if (skb_vlan_tag_present(skb)) { > > >>> if (pt_prev) { > > >>> ret = deliver_skb(skb, pt_prev, orig_dev); > > >>> pt_prev = NULL; > > >>> } > > >>> if (vlan_do_receive(&skb)) > > >>> goto another_round; > > >>> else if (unlikely(!skb)) > > >>> goto out; > > >>> } > > >>> > > >>> Thanks > > >>> > > >> > > >> I did an ftrace today and I find vlan_do_receive() is called for the > > >> incoming frames before passing SKB to hsr_handle_frame(). If someone > > >> can review this, it will help. Thanks. > > >> > > >> https://pastebin.ubuntu.com/p/CbRzXjwjR5/ > > > > > > hsr_handle_frame is an rx_handler called after > > > __netif_receive_skb_core called vlan_do_receive and jumped back to > > > another_round. > > > > Yes. hsr_handle_frame() is a rx_handler() after the above code that > > does vlan_do_receive(). The ftrace shows vlan_do_receive() is called > > followed by call to hsr_handle_frame(). From ifconfig I can see both > > hsr and vlan interface stats increments by same count. So I assume, > > vlan_do_receive() is called initially and it removes the tag, update > > stats and then return true and go for another round. Do you think that > > is the case? > > That was my understanding. > > > vlan_do_receive() calls vlan_find_dev(skb->dev, vlan_proto, vlan_id) > > to retrieve the real netdevice (real device). However VLAN device is > > attached to hsr device (real device), but SKB will have HSR slave > > Ethernet netdevice (in our case it is cpsw device) and vlan_find_dev() > > would have failed since there is no vlan_info in cpsw netdev struct. So > > below code in vlan_do_receive() should have failed and return false. > > > > vlan_dev = vlan_find_dev(skb->dev, vlan_proto, vlan_id); > > if (!vlan_dev) > > return false; > > > > So how does it goes for another_round ? May be vlan_find_dev is > > finding the hsr netdevice? > > It's good to answer this through code inspection and/or > instrumentation. I do not have the answer immediately either. Agreed that from reading the code I would vlan_do_receive to not find a vlan dev associated with the physical nic, then passes the packet unmodified to hsr_handle_frame. Perhaps this seems to work because skb_vlan_untag has already pulled the tag out of the packet? But then you should not see counters increased on the vlan dev.
Hi Willem, On 9/8/20 1:51 PM, Willem de Bruijn wrote: > On Tue, Sep 8, 2020 at 6:55 PM Murali Karicheri <m-karicheri2@ti.com> wrote: >> >> Hi Willem, >> >> On 9/4/20 11:52 AM, Willem de Bruijn wrote: >>> On Thu, Sep 3, 2020 at 12:30 AM Murali Karicheri <m-karicheri2@ti.com> wrote: >>>> >>>> All, >>>> >>>> On 9/2/20 12:14 PM, Murali Karicheri wrote: >>>>> All, >>>>> >>>>> On 9/1/20 3:54 PM, Murali Karicheri wrote: >>>>>> This series add support for creating VLAN interface over HSR or >>>>>> PRP interface. Typically industrial networks uses VLAN in >>>>>> deployment and this capability is needed to support these >>>>>> networks. >>>>>> >>>>>> This is tested using two TI AM572x IDK boards connected back >>>>>> to back over CPSW ports (eth0 and eth1). >>>>>> >>>>>> Following is the setup >>>>>> >>>>>> Physical Setup >>>>>> ++++++++++++++ >>>>>> _______________ (CPSW) _______________ >>>>>> | |----eth0-----| | >>>>>> |TI AM572x IDK1| | TI AM572x IDK2| >>>>>> |______________|----eth1-----|_______________| >>>>>> >>>>>> >>>>>> Network Topolgy >>>>>> +++++++++++++++ >>>>>> >>>>>> TI AM571x IDK TI AM572x IDK >>>>>> >>>>>> 192.168.100.10 CPSW ports 192.168.100.20 >>>>>> IDK-1 IDK-2 >>>>>> hsr0/prp0.100--| 192.168.2.10 |--eth0--| 192.168.2.20 |--hsr0/prp0.100 >>>>>> |----hsr0/prp0--| |---hsr0/prp0--| >>>>>> hsr0/prp0.101--| |--eth1--| |--hsr0/prp0/101 >>>>>> >>>>>> 192.168.101.10 192.168.101.20 >>>>>> >>>>>> Following tests:- >>>>>> - create hsr or prp interface and ping the interface IP address >>>>>> and verify ping is successful. >>>>>> - Create 2 VLANs over hsr or prp interface on both IDKs (VID 100 and >>>>>> 101). Ping between the IP address of the VLAN interfaces >>>>>> - Do iperf UDP traffic test with server on one IDK and client on the >>>>>> other. Do this using 100 and 101 subnet IP addresses >>>>>> - Dump /proc/net/vlan/{hsr|prp}0.100 and verify frames are transmitted >>>>>> and received at these interfaces. >>>>>> - Delete the vlan and hsr/prp interface and verify interfaces are >>>>>> removed cleanly. >>>>>> >>>>>> Logs for IDK-1 at https://pastebin.ubuntu.com/p/NxF83yZFDX/ >>>>>> Logs for IDK-2 at https://pastebin.ubuntu.com/p/YBXBcsPgVK/ >>>>>> >>>>>> Murali Karicheri (1): >>>>>> net: hsr/prp: add vlan support >>>>>> >>>>>> net/hsr/hsr_device.c | 4 ---- >>>>>> net/hsr/hsr_forward.c | 16 +++++++++++++--- >>>>>> 2 files changed, 13 insertions(+), 7 deletions(-) >>>>>> >>>>> I am not sure if the packet flow is right for this? >>>>> >>>>> VLAN over HSR frame format is like this. >>>>> >>>>> <Start of Frame><VLAN tag><HSR Tag><IP><CRC> >>>>> >>>>> My ifconfig stats shows both hsr and hsr0.100 interfaces receiving >>>>> frames. >>>>> >>>>> So I did a WARN_ON() in HSR driver before frame is forwarded to upper >>>>> layer. >>>>> >>>>> a0868495local@uda0868495:~/Projects/upstream-kernel$ git diff >>>>> diff --git a/net/hsr/hsr_forward.c b/net/hsr/hsr_forward.c >>>>> index de21df30b0d9..545a3cd8c71b 100644 >>>>> --- a/net/hsr/hsr_forward.c >>>>> +++ b/net/hsr/hsr_forward.c >>>>> @@ -415,9 +415,11 @@ static void hsr_forward_do(struct hsr_frame_info >>>>> *frame) >>>>> } >>>>> >>>>> skb->dev = port->dev; >>>>> - if (port->type == HSR_PT_MASTER) >>>>> + if (port->type == HSR_PT_MASTER) { >>>>> + if (skb_vlan_tag_present(skb)) >>>>> + WARN_ON(1); >>>>> hsr_deliver_master(skb, port->dev, >>>>> frame->node_src); >>>>> - else >>>>> + } else >>>>> hsr_xmit(skb, port, frame); >>>>> } >>>>> } >>>>> >>>>> And I get the trace shown below. >>>>> >>>>> [ 275.125431] WARNING: CPU: 0 PID: 0 at net/hsr/hsr_forward.c:420 >>>>> hsr_forward_skb+0x460/0x564 >>>>> [ 275.133822] Modules linked in: snd_soc_omap_hdmi snd_soc_ti_sdma >>>>> snd_soc_core snd_pcm_dmaengine snd_pcm snd_time4 >>>>> [ 275.199705] CPU: 0 PID: 0 Comm: swapper/0 Tainted: G W >>>>> 5.9.0-rc1-00658-g473e463812c2-dirty #8 >>>>> [ 275.209573] Hardware name: Generic DRA74X (Flattened Device Tree) >>>>> [ 275.215703] [<c011177c>] (unwind_backtrace) from [<c010b6f0>] >>>>> (show_stack+0x10/0x14) >>>>> [ 275.223487] [<c010b6f0>] (show_stack) from [<c055690c>] >>>>> (dump_stack+0xc4/0xe4) >>>>> [ 275.230747] [<c055690c>] (dump_stack) from [<c01386ac>] >>>>> (__warn+0xc0/0xf4) >>>>> [ 275.237656] [<c01386ac>] (__warn) from [<c0138a3c>] >>>>> (warn_slowpath_fmt+0x58/0xb8) >>>>> [ 275.245177] [<c0138a3c>] (warn_slowpath_fmt) from [<c09564bc>] >>>>> (hsr_forward_skb+0x460/0x564) >>>>> [ 275.253657] [<c09564bc>] (hsr_forward_skb) from [<c0955534>] >>>>> (hsr_handle_frame+0x15c/0x190) >>>>> [ 275.262047] [<c0955534>] (hsr_handle_frame) from [<c07c6704>] >>>>> (__netif_receive_skb_core+0x23c/0xc88) >>>>> [ 275.271223] [<c07c6704>] (__netif_receive_skb_core) from [<c07c7180>] >>>>> (__netif_receive_skb_one_core+0x30/0x74) >>>>> [ 275.281266] [<c07c7180>] (__netif_receive_skb_one_core) from >>>>> [<c07c72a4>] (netif_receive_skb+0x50/0x1c4) >>>>> [ 275.290793] [<c07c72a4>] (netif_receive_skb) from [<c071a55c>] >>>>> (cpsw_rx_handler+0x230/0x308) >>>>> [ 275.299272] [<c071a55c>] (cpsw_rx_handler) from [<c0715ee8>] >>>>> (__cpdma_chan_process+0xf4/0x188) >>>>> [ 275.307925] [<c0715ee8>] (__cpdma_chan_process) from [<c0717294>] >>>>> (cpdma_chan_process+0x3c/0x5c) >>>>> [ 275.316754] [<c0717294>] (cpdma_chan_process) from [<c071dd14>] >>>>> (cpsw_rx_mq_poll+0x44/0x98) >>>>> [ 275.325145] [<c071dd14>] (cpsw_rx_mq_poll) from [<c07c8ae0>] >>>>> (net_rx_action+0xf0/0x400) >>>>> [ 275.333185] [<c07c8ae0>] (net_rx_action) from [<c0101370>] >>>>> (__do_softirq+0xf0/0x3ac) >>>>> [ 275.340965] [<c0101370>] (__do_softirq) from [<c013f5ec>] >>>>> (irq_exit+0xa8/0xe4) >>>>> [ 275.348224] [<c013f5ec>] (irq_exit) from [<c0199344>] >>>>> (__handle_domain_irq+0x6c/0xe0) >>>>> [ 275.356093] [<c0199344>] (__handle_domain_irq) from [<c056f8fc>] >>>>> (gic_handle_irq+0x4c/0xa8) >>>>> [ 275.364481] [<c056f8fc>] (gic_handle_irq) from [<c0100b6c>] >>>>> (__irq_svc+0x6c/0x90) >>>>> [ 275.371996] Exception stack(0xc0e01f18 to 0xc0e01f60) >>>>> >>>>> Shouldn't it show vlan_do_receive() ? >>>>> >>>>> if (skb_vlan_tag_present(skb)) { >>>>> if (pt_prev) { >>>>> ret = deliver_skb(skb, pt_prev, orig_dev); >>>>> pt_prev = NULL; >>>>> } >>>>> if (vlan_do_receive(&skb)) >>>>> goto another_round; >>>>> else if (unlikely(!skb)) >>>>> goto out; >>>>> } >>>>> >>>>> Thanks >>>>> >>>> >>>> I did an ftrace today and I find vlan_do_receive() is called for the >>>> incoming frames before passing SKB to hsr_handle_frame(). If someone >>>> can review this, it will help. Thanks. >>>> >>>> https://pastebin.ubuntu.com/p/CbRzXjwjR5/ >>> >>> hsr_handle_frame is an rx_handler called after >>> __netif_receive_skb_core called vlan_do_receive and jumped back to >>> another_round. >> >> Yes. hsr_handle_frame() is a rx_handler() after the above code that >> does vlan_do_receive(). The ftrace shows vlan_do_receive() is called >> followed by call to hsr_handle_frame(). From ifconfig I can see both >> hsr and vlan interface stats increments by same count. So I assume, >> vlan_do_receive() is called initially and it removes the tag, update >> stats and then return true and go for another round. Do you think that >> is the case? > > That was my understanding. > >> vlan_do_receive() calls vlan_find_dev(skb->dev, vlan_proto, vlan_id) >> to retrieve the real netdevice (real device). However VLAN device is >> attached to hsr device (real device), but SKB will have HSR slave >> Ethernet netdevice (in our case it is cpsw device) and vlan_find_dev() >> would have failed since there is no vlan_info in cpsw netdev struct. So >> below code in vlan_do_receive() should have failed and return false. >> >> vlan_dev = vlan_find_dev(skb->dev, vlan_proto, vlan_id); >> if (!vlan_dev) >> return false; >> >> So how does it goes for another_round ? May be vlan_find_dev is >> finding the hsr netdevice? > > It's good to answer this through code inspection and/or > instrumentation. I do not have the answer immediately either. > > There certainly is prior art in having vlan with an rx_handler, > judging from the netif_is_macvlan_port(vlan_dev) and > netif_is_bridge_port(vlan_dev) helpers in vlan_do_receive. >> I am not an expert and so the question. Probably I can put a >> traceprintk() to confirm this, but if someone can clarify this >> it will be great. But for that, I will spin v2 with the above comments >> addressed as in my reply and post. > > Please don't send a patch before we understand this part. > Sure! That is on my TODO. Will confirm this before sending next revision of the patch. -- Murali Karicheri Texas Instruments
This series add support for creating VLAN interface over HSR or PRP interface. Typically industrial networks uses VLAN in deployment and this capability is needed to support these networks. This is tested using two TI AM572x IDK boards connected back to back over CPSW ports (eth0 and eth1). Following is the setup Physical Setup ++++++++++++++ _______________ (CPSW) _______________ | |----eth0-----| | |TI AM572x IDK1| | TI AM572x IDK2| |______________|----eth1-----|_______________| Network Topolgy +++++++++++++++ TI AM571x IDK TI AM572x IDK 192.168.100.10 CPSW ports 192.168.100.20 IDK-1 IDK-2 hsr0/prp0.100--| 192.168.2.10 |--eth0--| 192.168.2.20 |--hsr0/prp0.100 |----hsr0/prp0--| |---hsr0/prp0--| hsr0/prp0.101--| |--eth1--| |--hsr0/prp0/101 192.168.101.10 192.168.101.20 Following tests:- - create hsr or prp interface and ping the interface IP address and verify ping is successful. - Create 2 VLANs over hsr or prp interface on both IDKs (VID 100 and 101). Ping between the IP address of the VLAN interfaces - Do iperf UDP traffic test with server on one IDK and client on the other. Do this using 100 and 101 subnet IP addresses - Dump /proc/net/vlan/{hsr|prp}0.100 and verify frames are transmitted and received at these interfaces. - Delete the vlan and hsr/prp interface and verify interfaces are removed cleanly. Logs for IDK-1 at https://pastebin.ubuntu.com/p/NxF83yZFDX/ Logs for IDK-2 at https://pastebin.ubuntu.com/p/YBXBcsPgVK/ Murali Karicheri (1): net: hsr/prp: add vlan support net/hsr/hsr_device.c | 4 ---- net/hsr/hsr_forward.c | 16 +++++++++++++--- 2 files changed, 13 insertions(+), 7 deletions(-) -- 2.17.1