| Message ID | 166238334276.2220027.15473178874005714509.stgit@ebuild |
|---|---|
| State | Superseded |
| Headers | show |
| Series | tests: Add system-traffic.at tests to check-offloads. | expand |
| Context | Check | Description |
|---|---|---|
| ovsrobot/apply-robot | success | apply and check: success |
| ovsrobot/github-robot-_Build_and_Test | success | github build: passed |
| ovsrobot/intel-ovs-compilation | success | test: success |
On 05/09/2022 16:09, Eelco Chaudron wrote: > tc does not support conntrack ALGs. Even worse, with tc enabled, they > should not be used/configured at all. This is because even though TC > will ignore the rules with ALG configured, i.e., they will flow through > the kernel module, return traffic might flow through a tc conntrack > rule, and it will not invoke the ALG helper. > > Signed-off-by: Eelco Chaudron <echaudro@redhat.com> > --- > Documentation/howto/tc-offload.rst | 11 +++++++++++ > lib/netdev-offload-tc.c | 4 ++++ > tests/system-offloads-testsuite.at | 27 +++++++-------------------- > 3 files changed, 22 insertions(+), 20 deletions(-) > > diff --git a/Documentation/howto/tc-offload.rst b/Documentation/howto/tc-offload.rst > index f6482c8af..63687adc9 100644 > --- a/Documentation/howto/tc-offload.rst > +++ b/Documentation/howto/tc-offload.rst > @@ -112,3 +112,14 @@ First flow packet not processed by meter > Packets that are received by ovs-vswitchd through an upcall before the actual > meter flow is installed, are not passing TC police action and therefore are > not considered for policing. > + > +Conntrack Application Layer Gateways(ALG) > ++++++++++++++++++++++++++++++++++++++++++ > + > +TC does not support conntrack helpers, i.e., ALGs. TC will not offload flows if > +the ALG keyword is present within the ct() action. However, this will not allow > +ALGs to work within the datapath, as the return traffic without the ALG keyword > +might run through a TC rule, which internally will not call the conntrack > +helper required. > + > +So if ALG support is required, tc offload must be disabled. > diff --git a/lib/netdev-offload-tc.c b/lib/netdev-offload-tc.c > index 31f2bf205..20289a04b 100644 > --- a/lib/netdev-offload-tc.c > +++ b/lib/netdev-offload-tc.c > @@ -1336,6 +1336,10 @@ parse_put_flow_ct_action(struct tc_flower *flower, > action->ct.label_mask = ct_label->mask; > } > break; > + /* The following option we do not support in tc-ct, and should > + * not be ignored for proper operation. */ > + case OVS_CT_ATTR_HELPER: > + return EOPNOTSUPP; > } > } > > diff --git a/tests/system-offloads-testsuite.at b/tests/system-offloads-testsuite.at > index 4150d3d30..61c23717a 100644 > --- a/tests/system-offloads-testsuite.at > +++ b/tests/system-offloads-testsuite.at > @@ -54,6 +54,13 @@ m4_define([OVS_REVALIDATOR_PURGE], > m4_define([DPCTL_DUMP_CONNTRACK], [sleep 3; ovs-appctl dpctl/dump-conntrack]) > > > +# Conntrack ALGs are not supported for tc. > +m4_define([CHECK_CONNTRACK_ALG], > +[ > + AT_SKIP_IF([:]) > +]) > + > + > # The list below are tests that will not pass for a "test environment" specific > # issue. > m4_define([OVS_TEST_SKIP_LIST], > @@ -72,27 +79,7 @@ conntrack - IPv6 Fragmentation over vxlan > conntrack - zone-based timeout policy > conntrack - multiple zones, local > conntrack - multi-stage pipeline, local > -conntrack - FTP > -conntrack - FTP over IPv6 > -conntrack - IPv6 FTP Passive > -conntrack - FTP with multiple expectations > -conntrack - TFTP > conntrack - ICMP related with NAT > -conntrack - FTP SNAT prerecirc<SPC> > -conntrack - FTP SNAT prerecirc seqadj > -conntrack - FTP SNAT postrecirc<SPC> > -conntrack - FTP SNAT postrecirc seqadj > -conntrack - FTP SNAT orig tuple<SPC> > -conntrack - FTP SNAT orig tuple seqadj > -conntrack - IPv4 FTP Passive with SNAT > -conntrack - IPv4 FTP Passive with DNAT > -conntrack - IPv4 FTP Passive with DNAT 2 > -conntrack - IPv4 FTP Active with DNAT > -conntrack - IPv4 FTP Active with DNAT with reverse skew > -conntrack - IPv6 FTP with SNAT > -conntrack - IPv6 FTP Passive with SNAT > -conntrack - IPv6 FTP with SNAT - orig tuple > -conntrack - IPv4 TFTP with SNAT > conntrack - DNAT load balancing > conntrack - DNAT load balancing with NC > conntrack - Multiple ICMP traverse > > _______________________________________________ > dev mailing list > dev@openvswitch.org > https://mail.openvswitch.org/mailman/listinfo/ovs-dev Acked-by: Roi Dayan <roid@nvidia.com>
diff --git a/Documentation/howto/tc-offload.rst b/Documentation/howto/tc-offload.rst index f6482c8af..63687adc9 100644 --- a/Documentation/howto/tc-offload.rst +++ b/Documentation/howto/tc-offload.rst @@ -112,3 +112,14 @@ First flow packet not processed by meter Packets that are received by ovs-vswitchd through an upcall before the actual meter flow is installed, are not passing TC police action and therefore are not considered for policing. + +Conntrack Application Layer Gateways(ALG) ++++++++++++++++++++++++++++++++++++++++++ + +TC does not support conntrack helpers, i.e., ALGs. TC will not offload flows if +the ALG keyword is present within the ct() action. However, this will not allow +ALGs to work within the datapath, as the return traffic without the ALG keyword +might run through a TC rule, which internally will not call the conntrack +helper required. + +So if ALG support is required, tc offload must be disabled. diff --git a/lib/netdev-offload-tc.c b/lib/netdev-offload-tc.c index 31f2bf205..20289a04b 100644 --- a/lib/netdev-offload-tc.c +++ b/lib/netdev-offload-tc.c @@ -1336,6 +1336,10 @@ parse_put_flow_ct_action(struct tc_flower *flower, action->ct.label_mask = ct_label->mask; } break; + /* The following option we do not support in tc-ct, and should + * not be ignored for proper operation. */ + case OVS_CT_ATTR_HELPER: + return EOPNOTSUPP; } } diff --git a/tests/system-offloads-testsuite.at b/tests/system-offloads-testsuite.at index 4150d3d30..61c23717a 100644 --- a/tests/system-offloads-testsuite.at +++ b/tests/system-offloads-testsuite.at @@ -54,6 +54,13 @@ m4_define([OVS_REVALIDATOR_PURGE], m4_define([DPCTL_DUMP_CONNTRACK], [sleep 3; ovs-appctl dpctl/dump-conntrack]) +# Conntrack ALGs are not supported for tc. +m4_define([CHECK_CONNTRACK_ALG], +[ + AT_SKIP_IF([:]) +]) + + # The list below are tests that will not pass for a "test environment" specific # issue. m4_define([OVS_TEST_SKIP_LIST], @@ -72,27 +79,7 @@ conntrack - IPv6 Fragmentation over vxlan conntrack - zone-based timeout policy conntrack - multiple zones, local conntrack - multi-stage pipeline, local -conntrack - FTP -conntrack - FTP over IPv6 -conntrack - IPv6 FTP Passive -conntrack - FTP with multiple expectations -conntrack - TFTP conntrack - ICMP related with NAT -conntrack - FTP SNAT prerecirc<SPC> -conntrack - FTP SNAT prerecirc seqadj -conntrack - FTP SNAT postrecirc<SPC> -conntrack - FTP SNAT postrecirc seqadj -conntrack - FTP SNAT orig tuple<SPC> -conntrack - FTP SNAT orig tuple seqadj -conntrack - IPv4 FTP Passive with SNAT -conntrack - IPv4 FTP Passive with DNAT -conntrack - IPv4 FTP Passive with DNAT 2 -conntrack - IPv4 FTP Active with DNAT -conntrack - IPv4 FTP Active with DNAT with reverse skew -conntrack - IPv6 FTP with SNAT -conntrack - IPv6 FTP Passive with SNAT -conntrack - IPv6 FTP with SNAT - orig tuple -conntrack - IPv4 TFTP with SNAT conntrack - DNAT load balancing conntrack - DNAT load balancing with NC conntrack - Multiple ICMP traverse
tc does not support conntrack ALGs. Even worse, with tc enabled, they should not be used/configured at all. This is because even though TC will ignore the rules with ALG configured, i.e., they will flow through the kernel module, return traffic might flow through a tc conntrack rule, and it will not invoke the ALG helper. Signed-off-by: Eelco Chaudron <echaudro@redhat.com> --- Documentation/howto/tc-offload.rst | 11 +++++++++++ lib/netdev-offload-tc.c | 4 ++++ tests/system-offloads-testsuite.at | 27 +++++++-------------------- 3 files changed, 22 insertions(+), 20 deletions(-)