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authorVladimir Isaev <visaev@netgate.com>2020-08-27 13:34:50 +0300
committerOle Tr�an <otroan@employees.org>2020-09-11 11:45:33 +0000
commit8fb4d10dc208fb3f284fe79e838343797cb2d813 (patch)
tree4e4ba07e5dad1aa011b7655fc8c76d064439aee1
parent171d6aceb039a7f0b0d67c837ff74359dae01ae4 (diff)
nat: Fix next feature for ED with multiple workers
Multiple (> 1) workers leads to handoff node being enabled. This node pops next feature index to nat.arc_next to make sure that packet will be pushed to the next feature in the arc. But node nat44-ed-in2out-output also pops next feature and changes arc_next. So actual next feature will be skipped in that case. It leads to all nat44-ed-in2out packets being dropped if we have multiple workers (handoff node enabled). To resolve this a new node was added (nat-pre-in2out-output) to fill arc_next in single worker case and multiple worker case is already handled by handoff node. Type: fix Signed-off-by: Vladimir Isaev <visaev@netgate.com> Change-Id: I9dfba68f00164d2d5ab867224871811bef4411ed
-rw-r--r--src/plugins/nat/in2out_ed.c17
-rw-r--r--src/plugins/nat/nat.c9
-rw-r--r--src/plugins/nat/nat.h1
3 files changed, 25 insertions, 2 deletions
diff --git a/src/plugins/nat/in2out_ed.c b/src/plugins/nat/in2out_ed.c
index 448e967b8ae..d43caef46d9 100644
--- a/src/plugins/nat/in2out_ed.c
+++ b/src/plugins/nat/in2out_ed.c
@@ -964,7 +964,6 @@ nat44_ed_in2out_fast_path_node_fn_inline (vlib_main_t * vm,
if (is_output_feature)
{
- vnet_feature_next (&vnet_buffer2 (b0)->nat.arc_next, b0);
iph_offset0 = vnet_buffer (b0)->ip.reass.save_rewrite_length;
}
@@ -1586,6 +1585,13 @@ VLIB_NODE_FN (nat_pre_in2out_node)
NAT_NEXT_IN2OUT_ED_FAST_PATH);
}
+VLIB_NODE_FN (nat_pre_in2out_output_node)
+ (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame)
+{
+ return nat_pre_node_fn_inline (vm, node, frame,
+ NAT_NEXT_IN2OUT_ED_OUTPUT_FAST_PATH);
+}
+
/* *INDENT-OFF* */
VLIB_REGISTER_NODE (nat_pre_in2out_node) = {
.name = "nat-pre-in2out",
@@ -1595,6 +1601,15 @@ VLIB_REGISTER_NODE (nat_pre_in2out_node) = {
.type = VLIB_NODE_TYPE_INTERNAL,
.n_errors = 0,
};
+
+VLIB_REGISTER_NODE (nat_pre_in2out_output_node) = {
+ .name = "nat-pre-in2out-output",
+ .vector_size = sizeof (u32),
+ .sibling_of = "nat-default",
+ .format_trace = format_nat_pre_trace,
+ .type = VLIB_NODE_TYPE_INTERNAL,
+ .n_errors = 0,
+};
/* *INDENT-ON* */
/*
diff --git a/src/plugins/nat/nat.c b/src/plugins/nat/nat.c
index 61a36ec4e90..15c767c82c3 100644
--- a/src/plugins/nat/nat.c
+++ b/src/plugins/nat/nat.c
@@ -142,6 +142,12 @@ VNET_FEATURE_INIT (ip4_snat_hairpin_src, static) = {
.node_name = "nat44-hairpin-src",
.runs_after = VNET_FEATURES ("acl-plugin-out-ip4-fa","ip4-sv-reassembly-output-feature"),
};
+VNET_FEATURE_INIT (nat_pre_in2out_output, static) = {
+ .arc_name = "ip4-output",
+ .node_name = "nat-pre-in2out-output",
+ .runs_after = VNET_FEATURES ("ip4-sv-reassembly-output-feature"),
+ .runs_before = VNET_FEATURES ("acl-plugin-out-ip4-fa"),
+};
VNET_FEATURE_INIT (ip4_nat44_ed_in2out_output, static) = {
.arc_name = "ip4-output",
.node_name = "nat44-ed-in2out-output",
@@ -2249,7 +2255,7 @@ feature_set:
return rv;
vnet_feature_enable_disable ("ip4-unicast", "nat-pre-out2in",
sw_if_index, !is_del, 0, 0);
- vnet_feature_enable_disable ("ip4-output", "nat44-ed-in2out-output",
+ vnet_feature_enable_disable ("ip4-output", "nat-pre-in2out-output",
sw_if_index, !is_del, 0, 0);
}
else
@@ -4662,6 +4668,7 @@ VLIB_REGISTER_NODE (nat_default_node) = {
[NAT_NEXT_ICMP_ERROR] = "ip4-icmp-error",
[NAT_NEXT_IN2OUT_ED_FAST_PATH] = "nat44-ed-in2out",
[NAT_NEXT_IN2OUT_ED_SLOW_PATH] = "nat44-ed-in2out-slowpath",
+ [NAT_NEXT_IN2OUT_ED_OUTPUT_FAST_PATH] = "nat44-ed-in2out-output",
[NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH] = "nat44-ed-in2out-output-slowpath",
[NAT_NEXT_OUT2IN_ED_FAST_PATH] = "nat44-ed-out2in",
[NAT_NEXT_OUT2IN_ED_SLOW_PATH] = "nat44-ed-out2in-slowpath",
diff --git a/src/plugins/nat/nat.h b/src/plugins/nat/nat.h
index ab699221e69..fc5d32059ed 100644
--- a/src/plugins/nat/nat.h
+++ b/src/plugins/nat/nat.h
@@ -54,6 +54,7 @@ typedef enum
NAT_NEXT_ICMP_ERROR,
NAT_NEXT_IN2OUT_ED_FAST_PATH,
NAT_NEXT_IN2OUT_ED_SLOW_PATH,
+ NAT_NEXT_IN2OUT_ED_OUTPUT_FAST_PATH,
NAT_NEXT_IN2OUT_ED_OUTPUT_SLOW_PATH,
NAT_NEXT_OUT2IN_ED_FAST_PATH,
NAT_NEXT_OUT2IN_ED_SLOW_PATH,