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bpf: Add TC_ACT_REDIRECT check for nodeport #28927

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merged 1 commit into from
Nov 6, 2023
Merged

bpf: Add TC_ACT_REDIRECT check for nodeport #28927

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17 changes: 14 additions & 3 deletions bpf/bpf_overlay.c
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Original file line number Diff line number Diff line change
Expand Up @@ -57,7 +57,13 @@ static __always_inline int handle_ipv6(struct __ctx_buff *ctx,
#ifdef ENABLE_NODEPORT
if (!ctx_skip_nodeport(ctx)) {
ret = nodeport_lb6(ctx, ip6, *identity, ext_err);
if (ret < 0)
/* nodeport_lb6() returns with TC_ACT_REDIRECT for
* traffic to L7 LB. Policy enforcement needs to take
* place after L7 LB has processed the packet, so we
* return to stack immediately here with
* TC_ACT_REDIRECT.
*/
if (ret < 0 || ret == TC_ACT_REDIRECT)
return ret;
}
#endif
Expand Down Expand Up @@ -282,8 +288,13 @@ static __always_inline int handle_ipv4(struct __ctx_buff *ctx,
#ifdef ENABLE_NODEPORT
if (!ctx_skip_nodeport(ctx)) {
int ret = nodeport_lb4(ctx, ip4, ETH_HLEN, *identity, ext_err);

if (ret < 0)
/* nodeport_lb4() returns with TC_ACT_REDIRECT for
* traffic to L7 LB. Policy enforcement needs to take
* place after L7 LB has processed the packet, so we
* return to stack immediately here with
* TC_ACT_REDIRECT.
*/
if (ret < 0 || ret == TC_ACT_REDIRECT)
return ret;
}
#endif
Expand Down