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From: "Li, Tao" <tao.li06@sap.com>
To: "users@dpdk.org" <users@dpdk.org>
Subject: Failed to generalize modify_field action template for IPv6 src
address using the Async API
Thread-Topic: Failed to generalize modify_field action template for IPv6 src
address using the Async API
Thread-Index: AQHa7Wn8XR+wgFrkqEikQd2u5uzfgw==
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--_000_AM0PR02MB5796C9AE81F8FBA480C7A4EB80862AM0PR02MB5796eurp_
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Hello All,
I am using the async API to install flow rules to perform modify_field acti=
on to change content of packets=92 headers, especially the src address in a=
IPv6 header. But I am facing the issue of being unable to generalize the =
action template for this purpose. The testpmd commands used to modify the s=
rc IPv6 address of an incoming packet from PF0, then forward it to a VM are=
as follows. These commands are inspired by the synchronous examples from [=
1].
<Command to start test-pmd>
sudo ./dpdk-testpmd -a 3b:00.0,dv_flow_en=3D2,representor=3Dpf0vf0 -- -i --=
rxq=3D1 --txq=3D1 --flow-isolate-all
</Command to start test-pmd>
<Install async rules changing ipv6 src address>
port stop all
flow configure 0 queues_number 1 queues_size 10 counters_number 0 aging_cou=
nters_number 0 meters_number 0 flags 0
flow configure 1 queues_number 1 queues_size 10 counters_number 0 aging_cou=
nters_number 0 meters_number 0 flags 0
port start all
flow pattern_template 0 create pattern_template_id 10 transfer template re=
presented_port ethdev_port_id is 0 / eth / ipv6 / end
flow actions_template 0 create transfer actions_template_id 10 template j=
ump / end mask jump / end
flow pattern_template 0 create pattern_template_id 11 transfer template et=
h / ipv6 / end
flow actions_template 0 create transfer actions_template_id 13 template mod=
ify_field op set dst_type ipv6_src dst_level 0 dst_offset 0 src_type value =
src_value FFFFFFFFFFFF width 128 / represented_port / end mask modify_field=
op set dst_type ipv6_src dst_level 0xff dst_offset 0xffffffff src_type val=
ue src_value FFFFFFFFFFFF width 0xffffffff / represented_port / end
flow template_table 0 create group 0 priority 0 transfer wire_orig table_id=
0x1 rules_number 8 pattern_template 10 actions_template 10
flow template_table 0 create group 2 priority 0 transfer table_id 0x3 rules=
_number 8 pattern_template 11 actions_template 13
flow queue 0 create 0 template_table 0x1 pattern_template 0 actions_templat=
e 0 postpone no pattern represented_port ethdev_port_id is 0 / eth / ipv6 /=
end actions jump group 2 / end
flow queue 0 create 0 template_table 0x3 pattern_template 0 actions_templat=
e 0 postpone no pattern eth / ipv6 / end actions modify_field op set dst_t=
ype ipv6_src src_type value src_value 20010db8000000008a2e037073341234 widt=
h 128 / represented_port ethdev_port_id 1 / end
flow push 0 queue 0
</Install async rules changing ipv6 src address>
It is observed that, the src IPv6 address is changed but with the value of =
FFFF:FFFF:FFFF::, which is identical to the value used in the action templa=
te creation. Setting src_value to 0 would change the src IPv6 address to ::=
, which does not provide a generalized modify_field action template either=
.
<Packet trace>
11:42:57.922978 90:3c:b3:33:72:fb > 04:3f:72:e8:cf:ca, ethertype IPv6 (0x86=
dd), length 82: ffff:ffff:ffff:: > 7a2a:bcde:e0123:e301:0:1:0:1: 192.168.12=
9.5 > 172.32.4.9: ICMP echo request, id 0, seq 0, length 8
</Packet trace>
Thus, I would like to ask the community, if it is possible or how to create=
a generalized modify_field action template to allow installation of flow r=
ules with different src IPv6 address values, as experimented above.
Many thanks in advance.
[1] https://inbox.dpdk.org/dev/20211012080631.28504-4-viacheslavo@nvidia.co=
m/
Best regards,
Tao
--_000_AM0PR02MB5796C9AE81F8FBA480C7A4EB80862AM0PR02MB5796eurp_
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<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt">Hell=
o All,</span><span style=3D"mso-ligatures:none"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt">&nbs=
p;</span><o:p></o:p></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">I am using the async API to ins=
tall flow rules to perform
<span class=3D"spelle">modify_field</span> action to change content of pack=
ets=92 <span class=3D"grame">
headers, especially the src address in a IPv6 header. But I am</span>=
facing the issue of being unable to generalize the action template for thi=
s purpose. The testpmd commands used to modify the src IPv6 address of an i=
ncoming packet from PF0, then forward
it to a VM are as follows. These commands are inspired by the synchronous =
examples from [1].
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt"><br>
</span><b><span style=3D"font-size:10.5pt;color:#212121"><Command to sta=
rt test-pmd></span></b><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#212121">sudo =
./dpdk-testpmd -a 3b:00.0,dv_flow_en=3D2,representor=3Dpf0vf0 -- -i --rxq=
=3D1 --txq=3D1 --flow-isolate-all</span><o:p></o:p></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.5pt;color:#212121">&l=
t;/Command to start test-pmd></span></b><o:p></o:p></p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.5pt;co=
lor:#212121"> </span></b><o:p></o:p></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.5pt;color:#212121">&l=
t;</span></b><b><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#21212=
1">Install async rules changing ipv6 src address</span></b><b><span style=
=3D"font-size:10.5pt;color:#212121">></span></b><o:p></o:p></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#333333;mso-li=
gatures:none">port stop all</span><span style=3D"font-size:10.5pt;mso-ligat=
ures:none"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#333333;mso-li=
gatures:none">flow configure 0 queues_number 1 queues_size 10 counters_numb=
er 0 aging_counters_number 0 meters_number 0 flags 0</span><span style=3D"f=
ont-size:10.5pt;mso-ligatures:none"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#333333;mso-li=
gatures:none">flow configure 1 queues_number 1 queues_size 10 counters_numb=
er 0 aging_counters_number 0 meters_number 0 flags 0</span><span style=3D"f=
ont-size:10.5pt;mso-ligatures:none"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#333333;mso-li=
gatures:none">port start all</span><span lang=3D"EN-US" style=3D"font-size:=
10.5pt;color:#333333;mso-ligatures:none"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;mso-l=
igatures:none"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#333333;mso-li=
gatures:none">flow pattern_template 0 create pattern_template_id 10 t=
ransfer template represented_port ethdev_port_id is 0 / eth / ipv6 / end</s=
pan><span style=3D"font-size:10.5pt;mso-ligatures:none"><o:p></o:p></span><=
/p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#333333;mso-li=
gatures:none">flow actions_template 0 create transfer actions_template_id 1=
0 template jump / end mask jump / end</span><span lang=3D"EN-US=
" style=3D"font-size:10.5pt;color:#333333;mso-ligatures:none"><o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;mso-l=
igatures:none"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#333333;mso-li=
gatures:none">flow pattern_template 0 create pattern_template_id 11 t=
ransfer template eth / ipv6 / end</span><span style=3D"font-size:10.5pt;mso=
-ligatures:none"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#333333;mso-li=
gatures:none">flow actions_template 0 create transfer actions_template_id 1=
3 template modify_field op set dst_type ipv6_src dst_level 0 dst_offset 0 s=
rc_type value src_value
<b><i>FFFFFFFFFFFF</i></b> width 128 / represented_port / end mask modify_f=
ield op set dst_type ipv6_src dst_level 0xff dst_offset 0xffffffff src_type=
value src_value FFFFFFFFFFFF width 0xffffffff / represented_port / end</sp=
an><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#333333;mso-ligatur=
es:none"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;mso-l=
igatures:none"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#333333;mso-li=
gatures:none">flow template_table 0 create group 0 priority 0 transfer wire=
_orig table_id 0x1 rules_number 8 pattern_template 10 actions_template 10</=
span><span style=3D"font-size:10.5pt;mso-ligatures:none"><o:p></o:p></span>=
</p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#333333;mso-li=
gatures:none">flow template_table 0 create group 2 priority 0 transfer tabl=
e_id 0x3 rules_number 8 pattern_template 11 actions_template 13</span><span=
lang=3D"EN-US" style=3D"font-size:10.5pt;color:#333333;mso-ligatures:none"=
><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;mso-l=
igatures:none"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#333333;mso-li=
gatures:none">flow queue 0 create 0 template_table 0x1 pattern_template 0 a=
ctions_template 0 postpone no pattern represented_port ethdev_port_id is 0 =
/ eth / ipv6 / end actions jump group
2 / end</span><span style=3D"font-size:10.5pt;mso-ligatures:none"><o=
:p></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#333333;mso-li=
gatures:none">flow queue 0 create 0 template_table 0x3 pattern_template 0 a=
ctions_template 0 postpone no pattern eth / ipv6 / end actions m=
odify_field op set dst_type ipv6_src src_type
value src_value 20010db8000000008a2e037073341234 width 128 / represented_p=
ort ethdev_port_id 1 / end</span><span lang=3D"EN-US" style=3D"font-size:10=
.5pt;color:#333333;mso-ligatures:none"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;mso-l=
igatures:none"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:10.5pt;color:#333333;mso-li=
gatures:none">flow push 0 queue 0</span><span style=3D"font-size:10.5pt;mso=
-ligatures:none"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><b><span style=3D"font-size:10.5pt;color:#212121">&l=
t;</span></b><b><span lang=3D"EN-US" style=3D"font-size:10.5pt;color:#21212=
1">/Install async rules changing ipv6 src address</span></b><b><span style=
=3D"font-size:10.5pt;color:#212121">></span></b><b><span lang=3D"EN-US" =
style=3D"font-size:10.5pt;color:#212121"><o:p></o:p></span></b></p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.5pt;co=
lor:#212121"><o:p> </o:p></span></b></p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.5pt;co=
lor:#212121"><o:p> </o:p></span></b></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#212121">It is o=
bserved that, the src IPv6 address is changed but with the value of
</span><b><i><span style=3D"color:#333333;mso-ligatures:none">FFFF</span></=
i></b><b><i><span lang=3D"EN-US" style=3D"color:#333333;mso-ligatures:none"=
>:</span></i></b><b><i><span style=3D"color:#333333;mso-ligatures:none">FFF=
F</span></i></b><b><i><span lang=3D"EN-US" style=3D"color:#333333;mso-ligat=
ures:none">:</span></i></b><b><i><span style=3D"color:#333333;mso-ligatures=
:none">FFFF</span></i></b><b><i><span lang=3D"EN-US" style=3D"color:#333333=
;mso-ligatures:none">::</span></i></b><span lang=3D"EN-US" style=3D"color:#=
333333;mso-ligatures:none">,
which is identical to the value used in the action template creation. Sett=
ing src_value to 0 would change the src IPv6 address to
<b>:: </b>, which does not provide a generalized modify_field action templa=
te either.</span><span lang=3D"EN-US" style=3D"color:#212121"><o:p></o:p></=
span></p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.5pt;co=
lor:#212121"> <o:p></o:p></span></b></p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.5pt;co=
lor:#212121"><Packet trace><o:p></o:p></span></b></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#212121">11:42:57.922978 90:3c:b3:33:72:fb > 04:3f:72:e8:cf:ca, etherty=
pe IPv6 (0x86dd), length 82:
<b>ffff:ffff:ffff::</b> > 7a2a:bcde:e0123:e301:0:1:0:1: 192.168.129.5 &g=
t; 172.32.4.9: ICMP echo request, id 0, seq 0, length 8<o:p></o:p></span></=
p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.5pt;co=
lor:#212121"></Packet trace><o:p></o:p></span></b></p>
<p class=3D"MsoNormal"><b><span lang=3D"EN-US" style=3D"font-size:10.5pt;co=
lor:#212121"><o:p> </o:p></span></b></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:10.5pt;color=
:#212121"><o:p> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US">Thus, I would like to ask the c=
ommunity, if it is possible or how to create a generalized
</span><span lang=3D"EN-US" style=3D"color:#333333;mso-ligatures:none">modi=
fy_field action template to allow installation of flow rules with different=
src IPv6 address values, as experimented above.
<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"color:#333333;mso-liga=
tures:none">Many thanks in advance.</span><span lang=3D"EN-US"><o:p></o:p><=
/span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt;color=
:#212121"> </span><span lang=3D"EN-US"><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt">[1] =
<a href=3D"https://inbox.dpdk.org/dev/20211012080631.28504-4-viacheslavo@nv=
idia.com/">
https://inbox.dpdk.org/dev/20211012080631.28504-4-viacheslavo@nvidia.com/</=
a><o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt"><o:p=
> </o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt">Best=
regards,<o:p></o:p></span></p>
<p class=3D"MsoNormal"><span lang=3D"EN-US" style=3D"font-size:11.0pt">Tao<=
/span><o:p></o:p></p>
<p class=3D"MsoNormal"><o:p> </o:p></p>
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