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bpf: ct: have DISABLE_LOOPBACK_LB exclude all loopback fields from ct…
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…_state

Make it easier to catch stray users of the loopback-specific fields. And
improve the compile tests to actually cover this.

Signed-off-by: Julian Wiedmann <jwi@isovalent.com>
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julianwiedmann committed May 18, 2023
1 parent 05c3786 commit 4ed09d5
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64 changes: 32 additions & 32 deletions bpf/Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -140,26 +140,26 @@ bpf_overlay.o: bpf_overlay.ll
$(QUIET) ${LLC} ${LLC_FLAGS} -filetype=obj -o $@ $(patsubst %.o,%.ll,$@)

HOST_OPTIONS = $(LXC_OPTIONS) \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DENABLE_HOST_FIREWALL: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_HOST_FIREWALL: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_DSR: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_IPSEC:-DENABLE_DSR: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_IPSEC:-DHAVE_FIB_LOOKUP:-DENABLE_DSR: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_MASQUERADE: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_MASQUERADE:-DENABLE_EGRESS_GATEWAY: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_IPSEC:-DENABLE_NODEPORT:-DENABLE_MASQUERADE: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_IPSEC:-DHAVE_FIB_LOOKUP:-DENABLE_NODEPORT:-DENABLE_MASQUERADE: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_DSR: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_DSR:-DENABLE_DSR_HYBRID: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_HOST_FIREWALL: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_PREFILTER: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_PREFILTER:-DENABLE_HOST_FIREWALL: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_PREFILTER:-DENABLE_SESSION_AFFINITY:-DENABLE_HOST_FIREWALL: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_PREFILTER:-DENABLE_SESSION_AFFINITY:-DENABLE_HOST_FIREWALL:-DENABLE_ICMP_RULE: \
-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_PREFILTER:-DENABLE_SESSION_AFFINITY:-DENABLE_HOST_FIREWALL:-DENABLE_ICMP_RULE:-DENABLE_SRV6: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_PREFILTER:-DENABLE_SESSION_AFFINITY:-DENABLE_HOST_FIREWALL:-DENABLE_ICMP_RULE:-DENABLE_SRV6: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_PREFILTER:-DENABLE_SESSION_AFFINITY:-DENABLE_HOST_FIREWALL:-DENABLE_ICMP_RULE:-DENABLE_SRV6:-DENABLE_SRV6_SRH_ENCAP:-DENABLE_SCTP: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_PREFILTER:-DENABLE_SESSION_AFFINITY:-DENABLE_HOST_FIREWALL:-DENABLE_ICMP_RULE:-DENABLE_SRV6:-DENABLE_SRV6_SRH_ENCAP:-DENABLE_SCTP:-DENABLE_VTEP:
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DENABLE_HOST_FIREWALL: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_HOST_FIREWALL: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_DSR: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_IPSEC:-DENABLE_DSR: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_IPSEC:-DHAVE_FIB_LOOKUP:-DENABLE_DSR: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_MASQUERADE: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_MASQUERADE:-DENABLE_EGRESS_GATEWAY: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_IPSEC:-DENABLE_NODEPORT:-DENABLE_MASQUERADE: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_IPSEC:-DHAVE_FIB_LOOKUP:-DENABLE_NODEPORT:-DENABLE_MASQUERADE: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_DSR: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_DSR:-DENABLE_DSR_HYBRID: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_HOST_FIREWALL: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_PREFILTER: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_PREFILTER:-DENABLE_HOST_FIREWALL: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_PREFILTER:-DENABLE_SESSION_AFFINITY:-DENABLE_HOST_FIREWALL: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_PREFILTER:-DENABLE_SESSION_AFFINITY:-DENABLE_HOST_FIREWALL:-DENABLE_ICMP_RULE: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_PREFILTER:-DENABLE_SESSION_AFFINITY:-DENABLE_HOST_FIREWALL:-DENABLE_ICMP_RULE:-DENABLE_SRV6: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_PREFILTER:-DENABLE_SESSION_AFFINITY:-DENABLE_HOST_FIREWALL:-DENABLE_ICMP_RULE:-DENABLE_SRV6: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_PREFILTER:-DENABLE_SESSION_AFFINITY:-DENABLE_HOST_FIREWALL:-DENABLE_ICMP_RULE:-DENABLE_SRV6:-DENABLE_SRV6_SRH_ENCAP:-DENABLE_SCTP: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENCAP_IFINDEX:-DTUNNEL_MODE:-DPOLICY_VERDICT_NOTIFY:-DENABLE_NODEPORT:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_DSR:-DENABLE_DSR_HYBRID:-DENABLE_PREFILTER:-DENABLE_SESSION_AFFINITY:-DENABLE_HOST_FIREWALL:-DENABLE_ICMP_RULE:-DENABLE_SRV6:-DENABLE_SRV6_SRH_ENCAP:-DENABLE_SCTP:-DENABLE_VTEP:

ifndef MAX_HOST_OPTIONS
MAX_HOST_OPTIONS = $(MAX_BASE_OPTIONS) -DENCAP_IFINDEX=1 -DTUNNEL_MODE=1
Expand All @@ -185,18 +185,18 @@ bpf_host.o: bpf_host.ll
$(QUIET) ${LLC} ${LLC_FLAGS} -filetype=obj -o $@ $(patsubst %.o,%.ll,$@)

XDP_OPTIONS = $(LB_OPTIONS) \
-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_DSR:-DFROM_HOST: \
-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_IPSEC:-DENABLE_DSR:-DFROM_HOST: \
-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_MASQUERADE: \
-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_IPSEC:-DENABLE_NODEPORT:-DENABLE_MASQUERADE: \
-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_DSR: \
-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_DSR:-DENABLE_DSR_HYBRID: \
-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_DSR:-DDSR_ENCAP_MODE:-DDSR_ENCAP_NONE:-DDSR_ENCAP_IPIP=2 \
-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_DSR:-DDSR_ENCAP_MODE:-DDSR_ENCAP_IPIP:-DDSR_ENCAP_NONE=2 \
-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_DSR:-DDSR_ENCAP_MODE:-DDSR_ENCAP_GENEVE:-DDSR_ENCAP_IPIP=2 \
-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_DSR:-DENABLE_CAPTURE:-DDSR_ENCAP_MODE:-DDSR_ENCAP_NONE:-DDSR_ENCAP_IPIP=2 \
-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_DSR:-DENABLE_CAPTURE:-DDSR_ENCAP_MODE:-DDSR_ENCAP_IPIP:-DENABLE_SCTP:-DDSR_ENCAP_NONE=2 \
-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_DSR:-DENABLE_CAPTURE:-DDSR_ENCAP_MODE:-DDSR_ENCAP_GENEVE:-DENABLE_SCTP:-DDSR_ENCAP_IPIP=2
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_DSR:-DFROM_HOST: \
-DDISABLE_LOOPBACK_LB:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_IPSEC:-DENABLE_DSR:-DFROM_HOST: \
-DDISABLE_LOOPBACK_LB:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_MASQUERADE: \
-DDISABLE_LOOPBACK_LB:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_IPSEC:-DENABLE_NODEPORT:-DENABLE_MASQUERADE: \
-DDISABLE_LOOPBACK_LB:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_DSR: \
-DDISABLE_LOOPBACK_LB:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_DSR:-DENABLE_DSR_HYBRID: \
-DDISABLE_LOOPBACK_LB:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_DSR:-DDSR_ENCAP_MODE:-DDSR_ENCAP_NONE:-DDSR_ENCAP_IPIP=2 \
-DDISABLE_LOOPBACK_LB:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_DSR:-DDSR_ENCAP_MODE:-DDSR_ENCAP_IPIP:-DDSR_ENCAP_NONE=2 \
-DDISABLE_LOOPBACK_LB:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_DSR:-DDSR_ENCAP_MODE:-DDSR_ENCAP_GENEVE:-DDSR_ENCAP_IPIP=2 \
-DDISABLE_LOOPBACK_LB:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_DSR:-DENABLE_CAPTURE:-DDSR_ENCAP_MODE:-DDSR_ENCAP_NONE:-DDSR_ENCAP_IPIP=2 \
-DDISABLE_LOOPBACK_LB:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_DSR:-DENABLE_CAPTURE:-DDSR_ENCAP_MODE:-DDSR_ENCAP_IPIP:-DENABLE_SCTP:-DDSR_ENCAP_NONE=2 \
-DDISABLE_LOOPBACK_LB:-DENABLE_NODEPORT_ACCELERATION:-DENABLE_IPV4:-DENABLE_IPV6:-DENABLE_NODEPORT:-DENABLE_DSR:-DENABLE_CAPTURE:-DDSR_ENCAP_MODE:-DDSR_ENCAP_GENEVE:-DENABLE_SCTP:-DDSR_ENCAP_IPIP=2

ifndef MAX_XDP_OPTIONS
MAX_XDP_OPTIONS = $(MAX_BASE_OPTIONS) -DENABLE_PREFILTER=1
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6 changes: 6 additions & 0 deletions bpf/lib/common.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1093,7 +1093,11 @@ struct lb_affinity_match {

struct ct_state {
__u16 rev_nat_index;
#ifndef DISABLE_LOOPBACK_LB
__u16 loopback:1,
#else
__u16 loopback_disabled:1,
#endif
node_port:1,
dsr:1,
syn:1,
Expand All @@ -1102,8 +1106,10 @@ struct ct_state {
reserved1:1, /* Was auth_required, not used in production anywhere */
from_tunnel:1, /* Connection is from tunnel */
reserved:8;
#ifndef DISABLE_LOOPBACK_LB
__be32 addr;
__be32 svc_addr;
#endif
__u32 src_sec_id;
__u16 ifindex;
__u32 backend_id; /* Backend ID in lb4_backends */
Expand Down
4 changes: 4 additions & 0 deletions bpf/lib/lb.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1690,7 +1690,11 @@ static __always_inline void lb4_ctx_store_state(struct __ctx_buff *ctx,
{
ctx_store_meta(ctx, CB_PROXY_MAGIC, (__u32)proxy_port << 16);
ctx_store_meta(ctx, CB_CT_STATE, (__u32)state->rev_nat_index << 16 |
#ifndef DISABLE_LOOPBACK_LB
state->loopback);
#else
0);
#endif
ctx_store_meta(ctx, CB_CLUSTER_ID_EGRESS, cluster_id);
}

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