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Date: Wed, 4 Jul 2018 08:45:13 +0300
From: Konstantin Khlebnikov <khlebnikov@...dex-team.ru>
To: undisclosed-recipients:;
Cc: netdev <netdev@...r.kernel.org>,
Saeed Mahameed <saeedm@...lanox.com>,
Or Gerlitz <ogerlitz@...lanox.com>,
Tariq Toukan <tariqt@...lanox.com>,
Gal Pressman <galp@...lanox.com>
Subject: [BUG] mlx5 have problems with ipv4-ipv6 tunnels in linux 4.4
I'm seeing problems with tunnelled traffic with Mellanox Technologies MT27710 Family [ConnectX-4 Lx] using vanilla driver from linux 4.4.y
Packets with payload bigger than 116 bytes are not exmited.
Smaller packets and normal ipv6 works fine.
In linux 4.9, 4.14 and out-of-tree driver everything seems fine for now.
It's hard to guess or bisect commit: there are a lot of changes and something wrong with driver or swiotlb in 4.7..4.8.
4.6 is affected too - so this should be something between 4.6 and 4.9
Probably this case was fixed indirectly by adding some kind of offload and non-offloaded path is still broken.
Please give me a hint: which commit could it be.
In 4.4 ethtool shows this:
# ethtool -i eth0
driver: mlx5_core
version: 3.0-1 (January 2015)
firmware-version: 14.21.2500
expansion-rom-version:
bus-info: 0000:81:00.0
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: no
# ethtool -k eth0
Features for eth0:
rx-checksumming: on
tx-checksumming: on
tx-checksum-ipv4: on
tx-checksum-ip-generic: off [fixed]
tx-checksum-ipv6: on
tx-checksum-fcoe-crc: off [fixed]
tx-checksum-sctp: off [fixed]
scatter-gather: on
tx-scatter-gather: on
tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: off
tx-tcp-segmentation: off
tx-tcp-ecn-segmentation: off [fixed]
tx-tcp6-segmentation: off
udp-fragmentation-offload: off [fixed]
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off
rx-vlan-offload: on
tx-vlan-offload: on
ntuple-filters: off [fixed]
receive-hashing: on
highdma: on [fixed]
rx-vlan-filter: on
vlan-challenged: off [fixed]
tx-lockless: off [fixed]
netns-local: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: off [fixed]
tx-gre-segmentation: off [fixed]
tx-ipip-segmentation: off [fixed]
tx-sit-segmentation: off [fixed]
tx-udp_tnl-segmentation: off [fixed]
fcoe-mtu: off [fixed]
tx-nocache-copy: off
loopback: off [fixed]
rx-fcs: off [fixed]
rx-all: off [fixed]
tx-vlan-stag-hw-insert: off [fixed]
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
l2-fwd-offload: off [fixed]
busy-poll: off [fixed]
in 4.9
# ethtool -i eth0
driver: mlx5_core
version: 3.0-1 (January 2015)
firmware-version: 14.21.2500
expansion-rom-version:
bus-info: 0000:81:00.0
supports-statistics: yes
supports-test: no
supports-eeprom-access: no
supports-register-dump: no
supports-priv-flags: yes
# ethtool -k eth0
Features for eth0:
rx-checksumming: on
tx-checksumming: on
tx-checksum-ipv4: on
tx-checksum-ip-generic: off [fixed]
tx-checksum-ipv6: on
tx-checksum-fcoe-crc: off [fixed]
tx-checksum-sctp: off [fixed]
scatter-gather: on
tx-scatter-gather: on
tx-scatter-gather-fraglist: off [fixed]
tcp-segmentation-offload: off
tx-tcp-segmentation: off
tx-tcp-ecn-segmentation: off [fixed]
tx-tcp-mangleid-segmentation: off
tx-tcp6-segmentation: off
udp-fragmentation-offload: off [fixed]
generic-segmentation-offload: on
generic-receive-offload: on
large-receive-offload: off
rx-vlan-offload: on
tx-vlan-offload: on
ntuple-filters: off
receive-hashing: on
highdma: on [fixed]
rx-vlan-filter: on
vlan-challenged: off [fixed]
tx-lockless: off [fixed]
netns-local: off [fixed]
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: off [fixed]
tx-gre-segmentation: off [fixed]
tx-gre-csum-segmentation: off [fixed]
tx-ipxip4-segmentation: off [fixed]
tx-ipxip6-segmentation: off [fixed]
tx-udp_tnl-segmentation: on
tx-udp_tnl-csum-segmentation: on
tx-gso-partial: on
tx-sctp-segmentation: off [fixed]
fcoe-mtu: off [fixed]
tx-nocache-copy: off
loopback: off [fixed]
rx-fcs: off [fixed]
rx-all: off
tx-vlan-stag-hw-insert: off [fixed]
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
l2-fwd-offload: off [fixed]
busy-poll: off [fixed]
hw-tc-offload: off
diff
@@ -12,6 +12,7 @@
tcp-segmentation-offload: off
tx-tcp-segmentation: off
tx-tcp-ecn-segmentation: off [fixed]
+ tx-tcp-mangleid-segmentation: off
tx-tcp6-segmentation: off
udp-fragmentation-offload: off [fixed]
generic-segmentation-offload: on
@@ -19,7 +20,7 @@
large-receive-offload: off
rx-vlan-offload: on
tx-vlan-offload: on
-ntuple-filters: off [fixed]
+ntuple-filters: off
receive-hashing: on
highdma: on [fixed]
rx-vlan-filter: on
@@ -29,16 +30,21 @@
tx-gso-robust: off [fixed]
tx-fcoe-segmentation: off [fixed]
tx-gre-segmentation: off [fixed]
-tx-ipip-segmentation: off [fixed]
-tx-sit-segmentation: off [fixed]
-tx-udp_tnl-segmentation: off [fixed]
+tx-gre-csum-segmentation: off [fixed]
+tx-ipxip4-segmentation: off [fixed]
+tx-ipxip6-segmentation: off [fixed]
+tx-udp_tnl-segmentation: on
+tx-udp_tnl-csum-segmentation: on
+tx-gso-partial: on
+tx-sctp-segmentation: off [fixed]
fcoe-mtu: off [fixed]
tx-nocache-copy: off
loopback: off [fixed]
rx-fcs: off [fixed]
-rx-all: off [fixed]
+rx-all: off
tx-vlan-stag-hw-insert: off [fixed]
rx-vlan-stag-hw-parse: off [fixed]
rx-vlan-stag-filter: off [fixed]
l2-fwd-offload: off [fixed]
busy-poll: off [fixed]
+hw-tc-offload: off
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