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Extend ipcache key with ClusterID #22200

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merged 3 commits into from
Jan 10, 2023
Merged

Extend ipcache key with ClusterID #22200

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5f3c9fa
clustermesh: Introduce a new type PrefixCluster
YutaroHayakawa Nov 16, 2022
723b775
bpf: Add a new field cluster_id to struct ipcache_key
YutaroHayakawa Nov 16, 2022
0c7514a
bpf: Change ipcache lookup functions to take ClusterID
YutaroHayakawa Nov 16, 2022
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18 changes: 9 additions & 9 deletions bpf/bpf_host.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -123,7 +123,7 @@ ipcache_lookup_srcid6(struct __ctx_buff *ctx)
if (!revalidate_data(ctx, &data, &data_end, &ip6))
return DROP_INVALID;

info = lookup_ip6_remote_endpoint((union v6addr *) &ip6->saddr);
info = lookup_ip6_remote_endpoint((union v6addr *)&ip6->saddr, 0);
if (info != NULL)
srcid = info->sec_label;
cilium_dbg(ctx, info ? DBG_IP_ID_MAP_SUCCEED6 : DBG_IP_ID_MAP_FAILED6,
Expand Down Expand Up @@ -159,7 +159,7 @@ resolve_srcid_ipv6(struct __ctx_buff *ctx, __u32 srcid_from_proxy,
/* Packets from the proxy will already have a real identity. */
if (identity_is_reserved(srcid_from_ipcache)) {
src = (union v6addr *) &ip6->saddr;
info = lookup_ip6_remote_endpoint(src);
info = lookup_ip6_remote_endpoint(src, 0);
if (info != NULL && info->sec_label)
srcid_from_ipcache = info->sec_label;
cilium_dbg(ctx, info ? DBG_IP_ID_MAP_SUCCEED6 : DBG_IP_ID_MAP_FAILED6,
Expand Down Expand Up @@ -293,7 +293,7 @@ handle_ipv6(struct __ctx_buff *ctx, __u32 secctx, const bool from_host,

#ifdef TUNNEL_MODE
dst = (union v6addr *) &ip6->daddr;
info = ipcache_lookup6(&IPCACHE_MAP, dst, V6_CACHE_KEY_LEN);
info = ipcache_lookup6(&IPCACHE_MAP, dst, V6_CACHE_KEY_LEN, 0);
if (info != NULL && info->tunnel_endpoint != 0) {
/* If IPSEC is needed recirc through ingress to use xfrm stack
* and then result will routed back through bpf_netdev on egress
Expand All @@ -320,7 +320,7 @@ handle_ipv6(struct __ctx_buff *ctx, __u32 secctx, const bool from_host,
#endif

dst = (union v6addr *) &ip6->daddr;
info = ipcache_lookup6(&IPCACHE_MAP, dst, V6_CACHE_KEY_LEN);
info = ipcache_lookup6(&IPCACHE_MAP, dst, V6_CACHE_KEY_LEN, 0);
if (info == NULL || info->sec_label == WORLD_ID) {
/* See IPv4 comment. */
return DROP_UNROUTABLE;
Expand Down Expand Up @@ -422,7 +422,7 @@ resolve_srcid_ipv4(struct __ctx_buff *ctx, __u32 srcid_from_proxy,

/* Packets from the proxy will already have a real identity. */
if (identity_is_reserved(srcid_from_ipcache)) {
info = lookup_ip4_remote_endpoint(ip4->saddr);
info = lookup_ip4_remote_endpoint(ip4->saddr, 0);
if (info != NULL) {
*sec_label = info->sec_label;

Expand Down Expand Up @@ -595,7 +595,7 @@ handle_ipv4(struct __ctx_buff *ctx, __u32 secctx,
#endif

#ifdef TUNNEL_MODE
info = ipcache_lookup4(&IPCACHE_MAP, ip4->daddr, V4_CACHE_KEY_LEN);
info = ipcache_lookup4(&IPCACHE_MAP, ip4->daddr, V4_CACHE_KEY_LEN, 0);
if (info != NULL && info->tunnel_endpoint != 0) {
return encap_and_redirect_with_nodeid(ctx, info->tunnel_endpoint,
info->key, secctx, info->sec_label,
Expand All @@ -614,7 +614,7 @@ handle_ipv4(struct __ctx_buff *ctx, __u32 secctx,
}
#endif

info = ipcache_lookup4(&IPCACHE_MAP, ip4->daddr, V4_CACHE_KEY_LEN);
info = ipcache_lookup4(&IPCACHE_MAP, ip4->daddr, V4_CACHE_KEY_LEN, 0);
if (info == NULL || info->sec_label == WORLD_ID) {
/* We have received a packet for which no ipcache entry exists,
* we do not know what to do with this packet, drop it.
Expand Down Expand Up @@ -968,7 +968,7 @@ handle_srv6(struct __ctx_buff *ctx)
return DROP_MISSED_TAIL_CALL;
}

ep = lookup_ip6_remote_endpoint((union v6addr *)&ip6->daddr);
ep = lookup_ip6_remote_endpoint((union v6addr *)&ip6->daddr, 0);
if (ep) {
dst_id = ep->sec_label;
} else {
Expand Down Expand Up @@ -1001,7 +1001,7 @@ handle_srv6(struct __ctx_buff *ctx)
return DROP_MISSED_TAIL_CALL;
}

ep = lookup_ip4_remote_endpoint(ip4->daddr);
ep = lookup_ip4_remote_endpoint(ip4->daddr, 0);
if (ep) {
dst_id = ep->sec_label;
} else {
Expand Down
8 changes: 4 additions & 4 deletions bpf/bpf_lxc.c
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Original file line number Diff line number Diff line change
Expand Up @@ -236,7 +236,7 @@ static __always_inline int handle_ipv6_from_lxc(struct __ctx_buff *ctx, __u32 *d
const union v6addr *daddr = (union v6addr *)&ip6->daddr;
struct remote_endpoint_info *info;

info = lookup_ip6_remote_endpoint(daddr);
info = lookup_ip6_remote_endpoint(daddr, 0);
if (info && info->sec_label) {
*dst_id = info->sec_label;
tunnel_endpoint = info->tunnel_endpoint;
Expand Down Expand Up @@ -760,7 +760,7 @@ static __always_inline int handle_ipv4_from_lxc(struct __ctx_buff *ctx, __u32 *d
if (1) {
struct remote_endpoint_info *info;

info = lookup_ip4_remote_endpoint(ip4->daddr);
info = lookup_ip4_remote_endpoint(ip4->daddr, 0);
if (info && info->sec_label) {
*dst_id = info->sec_label;
tunnel_endpoint = info->tunnel_endpoint;
Expand Down Expand Up @@ -1602,7 +1602,7 @@ int tail_ipv6_to_endpoint(struct __ctx_buff *ctx)
union v6addr *src = (union v6addr *)&ip6->saddr;
struct remote_endpoint_info *info;

info = lookup_ip6_remote_endpoint(src);
info = lookup_ip6_remote_endpoint(src, 0);
if (info != NULL) {
__u32 sec_label = info->sec_label;

Expand Down Expand Up @@ -1942,7 +1942,7 @@ int tail_ipv4_to_endpoint(struct __ctx_buff *ctx)
if (identity_is_reserved(src_identity)) {
struct remote_endpoint_info *info;

info = lookup_ip4_remote_endpoint(ip4->saddr);
info = lookup_ip4_remote_endpoint(ip4->saddr, 0);
if (info != NULL) {
__u32 sec_label = info->sec_label;

Expand Down
4 changes: 2 additions & 2 deletions bpf/bpf_overlay.c
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Original file line number Diff line number Diff line change
Expand Up @@ -97,7 +97,7 @@ static __always_inline int handle_ipv6(struct __ctx_buff *ctx,
*/
info = ipcache_lookup6(&IPCACHE_MAP,
(union v6addr *)&ip6->saddr,
V6_CACHE_KEY_LEN);
V6_CACHE_KEY_LEN, 0);
if (info)
*identity = info->sec_label;
}
Expand Down Expand Up @@ -257,7 +257,7 @@ static __always_inline int handle_ipv4(struct __ctx_buff *ctx, __u32 *identity)
struct remote_endpoint_info *info;

info = ipcache_lookup4(&IPCACHE_MAP, ip4->saddr,
V4_CACHE_KEY_LEN);
V4_CACHE_KEY_LEN, 0);
if (info)
*identity = info->sec_label;
}
Expand Down
8 changes: 4 additions & 4 deletions bpf/bpf_sock.c
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Original file line number Diff line number Diff line change
Expand Up @@ -165,7 +165,7 @@ sock4_skip_xlate(struct lb4_service *svc, __be32 address)
struct remote_endpoint_info *info;

info = ipcache_lookup4(&IPCACHE_MAP, address,
V4_CACHE_KEY_LEN);
V4_CACHE_KEY_LEN, 0);
if (info == NULL || info->sec_label != HOST_ID)
return true;
}
Expand Down Expand Up @@ -195,7 +195,7 @@ sock4_wildcard_lookup(struct lb4_key *key __maybe_unused,
if (in_hostns && is_v4_loopback(key->address))
goto wildcard_lookup;

info = ipcache_lookup4(&IPCACHE_MAP, key->address, V4_CACHE_KEY_LEN);
info = ipcache_lookup4(&IPCACHE_MAP, key->address, V4_CACHE_KEY_LEN, 0);
if (info != NULL && (info->sec_label == HOST_ID ||
(include_remote_hosts && identity_is_remote_node(info->sec_label))))
goto wildcard_lookup;
Expand Down Expand Up @@ -718,7 +718,7 @@ sock6_skip_xlate(struct lb6_service *svc, const union v6addr *address)
struct remote_endpoint_info *info;

info = ipcache_lookup6(&IPCACHE_MAP, address,
V6_CACHE_KEY_LEN);
V6_CACHE_KEY_LEN, 0);
if (info == NULL || info->sec_label != HOST_ID)
return true;
}
Expand Down Expand Up @@ -748,7 +748,7 @@ sock6_wildcard_lookup(struct lb6_key *key __maybe_unused,
if (in_hostns && is_v6_loopback(&key->address))
goto wildcard_lookup;

info = ipcache_lookup6(&IPCACHE_MAP, &key->address, V6_CACHE_KEY_LEN);
info = ipcache_lookup6(&IPCACHE_MAP, &key->address, V6_CACHE_KEY_LEN, 0);
if (info != NULL && (info->sec_label == HOST_ID ||
(include_remote_hosts && identity_is_remote_node(info->sec_label))))
goto wildcard_lookup;
Expand Down
2 changes: 1 addition & 1 deletion bpf/lib/egress_policies.h
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Original file line number Diff line number Diff line change
Expand Up @@ -75,7 +75,7 @@ bool egress_gw_reply_needs_redirect(struct iphdr *ip4, __u32 *tunnel_endpoint,
if (!egress_policy)
return false;

info = ipcache_lookup4(&IPCACHE_MAP, ip4->daddr, V4_CACHE_KEY_LEN);
info = ipcache_lookup4(&IPCACHE_MAP, ip4->daddr, V4_CACHE_KEY_LEN, 0);
if (!info || info->tunnel_endpoint == 0)
return false;

Expand Down
18 changes: 10 additions & 8 deletions bpf/lib/eps.h
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Original file line number Diff line number Diff line change
Expand Up @@ -66,12 +66,13 @@ lookup_ip4_endpoint_policy_map(__u32 ip)

static __always_inline __maybe_unused struct remote_endpoint_info *
ipcache_lookup6(const void *map, const union v6addr *addr,
__u32 prefix)
__u32 prefix, __u8 cluster_id)
{
struct ipcache_key key = {
.lpm_key = { IPCACHE_PREFIX_LEN(prefix), {} },
.family = ENDPOINT_KEY_IPV6,
.ip6 = *addr,
.cluster_id = cluster_id,
};
ipv6_addr_clear_suffix(&key.ip6, prefix);
return map_lookup_elem(map, &key);
Expand All @@ -80,12 +81,13 @@ ipcache_lookup6(const void *map, const union v6addr *addr,
#define V4_CACHE_KEY_LEN (sizeof(__u32)*8)

static __always_inline __maybe_unused struct remote_endpoint_info *
ipcache_lookup4(const void *map, __be32 addr, __u32 prefix)
ipcache_lookup4(const void *map, __be32 addr, __u32 prefix, __u8 cluster_id)
{
struct ipcache_key key = {
.lpm_key = { IPCACHE_PREFIX_LEN(prefix), {} },
.family = ENDPOINT_KEY_IPV4,
.ip4 = addr,
.cluster_id = cluster_id,
};
key.ip4 &= GET_PREFIX(prefix);
return map_lookup_elem(map, &key);
Expand All @@ -99,7 +101,7 @@ ipcache_lookup4(const void *map, __be32 addr, __u32 prefix)
*/
#define LPM_LOOKUP_FN(NAME, IPTYPE, PREFIXES, MAP, LOOKUP_FN) \
static __always_inline __maybe_unused struct remote_endpoint_info * \
NAME(IPTYPE addr) \
NAME(IPTYPE addr, __u8 cluster_id) \
{ \
int prefixes[] = { PREFIXES }; \
const int size = ARRAY_SIZE(prefixes); \
Expand All @@ -108,7 +110,7 @@ NAME(IPTYPE addr) \
\
_Pragma("unroll") \
for (i = 0; i < size; i++) { \
info = LOOKUP_FN(&MAP, addr, prefixes[i]); \
info = LOOKUP_FN(&MAP, addr, prefixes[i], cluster_id); \
if (info != NULL) \
return info; \
} \
Expand All @@ -125,9 +127,9 @@ LPM_LOOKUP_FN(lookup_ip4_remote_endpoint, __be32, IPCACHE4_PREFIXES,
#endif
#undef LPM_LOOKUP_FN
#else /* HAVE_LPM_TRIE_MAP_TYPE */
#define lookup_ip6_remote_endpoint(addr) \
ipcache_lookup6(&IPCACHE_MAP, addr, V6_CACHE_KEY_LEN)
#define lookup_ip4_remote_endpoint(addr) \
ipcache_lookup4(&IPCACHE_MAP, addr, V4_CACHE_KEY_LEN)
#define lookup_ip6_remote_endpoint(addr, cluster_id) \
ipcache_lookup6(&IPCACHE_MAP, addr, V6_CACHE_KEY_LEN, cluster_id)
#define lookup_ip4_remote_endpoint(addr, cluster_id) \
ipcache_lookup4(&IPCACHE_MAP, addr, V4_CACHE_KEY_LEN, cluster_id)
#endif /* HAVE_LPM_TRIE_MAP_TYPE */
#endif /* __LIB_EPS_H_ */
12 changes: 6 additions & 6 deletions bpf/lib/host_firewall.h
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Original file line number Diff line number Diff line change
Expand Up @@ -54,7 +54,7 @@ ipv6_host_policy_egress(struct __ctx_buff *ctx, __u32 src_id,
trace->reason = (enum trace_reason)ret;

/* Retrieve destination identity. */
info = lookup_ip6_remote_endpoint(&orig_dip);
info = lookup_ip6_remote_endpoint(&orig_dip, 0);
if (info && info->sec_label)
dst_id = info->sec_label;
cilium_dbg(ctx, info ? DBG_IP_ID_MAP_SUCCEED6 : DBG_IP_ID_MAP_FAILED6,
Expand Down Expand Up @@ -110,7 +110,7 @@ ipv6_host_policy_ingress(struct __ctx_buff *ctx, __u32 *src_id,

/* Retrieve destination identity. */
ipv6_addr_copy(&tuple.daddr, (union v6addr *)&ip6->daddr);
info = lookup_ip6_remote_endpoint(&tuple.daddr);
info = lookup_ip6_remote_endpoint(&tuple.daddr, 0);
if (info && info->sec_label)
dst_id = info->sec_label;
cilium_dbg(ctx, info ? DBG_IP_ID_MAP_SUCCEED6 : DBG_IP_ID_MAP_FAILED6,
Expand All @@ -136,7 +136,7 @@ ipv6_host_policy_ingress(struct __ctx_buff *ctx, __u32 *src_id,
trace->reason = (enum trace_reason)ret;

/* Retrieve source identity. */
info = lookup_ip6_remote_endpoint(&orig_sip);
info = lookup_ip6_remote_endpoint(&orig_sip, 0);
if (info && info->sec_label)
*src_id = info->sec_label;
cilium_dbg(ctx, info ? DBG_IP_ID_MAP_SUCCEED6 : DBG_IP_ID_MAP_FAILED6,
Expand Down Expand Up @@ -272,7 +272,7 @@ ipv4_host_policy_egress(struct __ctx_buff *ctx, __u32 src_id,
trace->reason = (enum trace_reason)ret;

/* Retrieve destination identity. */
info = lookup_ip4_remote_endpoint(ip4->daddr);
info = lookup_ip4_remote_endpoint(ip4->daddr, 0);
if (info && info->sec_label)
dst_id = info->sec_label;
cilium_dbg(ctx, info ? DBG_IP_ID_MAP_SUCCEED4 : DBG_IP_ID_MAP_FAILED4,
Expand Down Expand Up @@ -327,7 +327,7 @@ ipv4_host_policy_ingress(struct __ctx_buff *ctx, __u32 *src_id,
return DROP_INVALID;

/* Retrieve destination identity. */
info = lookup_ip4_remote_endpoint(ip4->daddr);
info = lookup_ip4_remote_endpoint(ip4->daddr, 0);
if (info && info->sec_label)
dst_id = info->sec_label;
cilium_dbg(ctx, info ? DBG_IP_ID_MAP_SUCCEED4 : DBG_IP_ID_MAP_FAILED4,
Expand Down Expand Up @@ -356,7 +356,7 @@ ipv4_host_policy_ingress(struct __ctx_buff *ctx, __u32 *src_id,
trace->reason = (enum trace_reason)ret;

/* Retrieve source identity. */
info = lookup_ip4_remote_endpoint(ip4->saddr);
info = lookup_ip4_remote_endpoint(ip4->saddr, 0);
if (info && info->sec_label)
*src_id = info->sec_label;
cilium_dbg(ctx, info ? DBG_IP_ID_MAP_SUCCEED4 : DBG_IP_ID_MAP_FAILED4,
Expand Down
2 changes: 1 addition & 1 deletion bpf/lib/maps.h
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Original file line number Diff line number Diff line change
Expand Up @@ -168,7 +168,7 @@ _Pragma("unroll") \
struct ipcache_key {
struct bpf_lpm_trie_key lpm_key;
__u16 pad1;
__u8 pad2;
__u8 cluster_id;
__u8 family;
union {
struct {
Expand Down
2 changes: 1 addition & 1 deletion bpf/lib/nat.h
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Original file line number Diff line number Diff line change
Expand Up @@ -620,7 +620,7 @@ static __always_inline bool snat_v4_prepare_state(struct __ctx_buff *ctx,
#endif /* defined(TUNNEL_MODE) && defined(IS_BPF_OVERLAY) */

local_ep = __lookup_ip4_endpoint(ip4->saddr);
remote_ep = lookup_ip4_remote_endpoint(ip4->daddr);
remote_ep = lookup_ip4_remote_endpoint(ip4->daddr, 0);

/* Check if this packet belongs to reply traffic coming from a
* local endpoint.
Expand Down
8 changes: 4 additions & 4 deletions bpf/lib/nodeport.h
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Original file line number Diff line number Diff line change
Expand Up @@ -730,7 +730,7 @@ int tail_nodeport_nat_egress_ipv6(struct __ctx_buff *ctx)
}

dst = (union v6addr *)&ip6->daddr;
info = ipcache_lookup6(&IPCACHE_MAP, dst, V6_CACHE_KEY_LEN);
info = ipcache_lookup6(&IPCACHE_MAP, dst, V6_CACHE_KEY_LEN, 0);
if (info && info->tunnel_endpoint != 0) {
ret = __encap_with_nodeid(ctx, info->tunnel_endpoint,
WORLD_ID,
Expand Down Expand Up @@ -1029,7 +1029,7 @@ static __always_inline int rev_nodeport_lb6(struct __ctx_buff *ctx, __u32 *ifind
union v6addr *dst = (union v6addr *)&ip6->daddr;
struct remote_endpoint_info *info;

info = ipcache_lookup6(&IPCACHE_MAP, dst, V6_CACHE_KEY_LEN);
info = ipcache_lookup6(&IPCACHE_MAP, dst, V6_CACHE_KEY_LEN, 0);
if (info != NULL && info->tunnel_endpoint != 0) {
return __encap_with_nodeid(ctx, info->tunnel_endpoint,
SECLABEL, info->sec_label,
Expand Down Expand Up @@ -1690,7 +1690,7 @@ int tail_nodeport_nat_egress_ipv4(struct __ctx_buff *ctx)
goto drop_err;
}

info = ipcache_lookup4(&IPCACHE_MAP, ip4->daddr, V4_CACHE_KEY_LEN);
info = ipcache_lookup4(&IPCACHE_MAP, ip4->daddr, V4_CACHE_KEY_LEN, 0);
if (info && info->tunnel_endpoint != 0) {
/* The dir == NAT_DIR_EGRESS branch is executed for
* N/S LB requests which needs to be fwd-ed to a remote
Expand Down Expand Up @@ -2010,7 +2010,7 @@ static __always_inline int rev_nodeport_lb4(struct __ctx_buff *ctx, __u32 *ifind
{
struct remote_endpoint_info *info;

info = ipcache_lookup4(&IPCACHE_MAP, ip4->daddr, V4_CACHE_KEY_LEN);
info = ipcache_lookup4(&IPCACHE_MAP, ip4->daddr, V4_CACHE_KEY_LEN, 0);
if (info != NULL && info->tunnel_endpoint != 0) {
tunnel_endpoint = info->tunnel_endpoint;
dst_id = info->sec_label;
Expand Down
2 changes: 1 addition & 1 deletion bpf/sockops/bpf_redir.c
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Original file line number Diff line number Diff line change
Expand Up @@ -54,7 +54,7 @@ int cil_redir_proxy(struct sk_msg_md *msg)
* socket to avoid extra overhead. This would require the agent though
* to flush the sock ops map on policy changes.
*/
info = lookup_ip4_remote_endpoint(key.dip4);
info = lookup_ip4_remote_endpoint(key.dip4, 0);
if (info != NULL && info->sec_label)
dst_id = info->sec_label;
else
Expand Down
2 changes: 1 addition & 1 deletion bpf/sockops/bpf_sockops.c
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Original file line number Diff line number Diff line change
Expand Up @@ -75,7 +75,7 @@ static inline void bpf_sock_ops_ipv4(struct bpf_sock_ops *skops)
if (1) {
struct remote_endpoint_info *info;

info = lookup_ip4_remote_endpoint(key.dip4);
info = lookup_ip4_remote_endpoint(key.dip4, 0);
if (info != NULL && info->sec_label)
dst_id = info->sec_label;
else
Expand Down
3 changes: 2 additions & 1 deletion bpf/tests/nat_test.c
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Original file line number Diff line number Diff line change
Expand Up @@ -88,7 +88,8 @@ static __always_inline struct endpoint_info *mock__lookup_ip4_endpoint(__maybe_u
return NULL;
}

static __always_inline struct remote_endpoint_info *mock_lookup_ip4_remote_endpoint(__maybe_unused __u32 ip)
static __always_inline struct remote_endpoint_info *
mock_lookup_ip4_remote_endpoint(__maybe_unused __u32 ip, __maybe_unused __u8 cluster_id)
{
return NULL;
}
Expand Down
4 changes: 2 additions & 2 deletions bpf/tests/wildcard_lookup.c
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Original file line number Diff line number Diff line change
Expand Up @@ -123,7 +123,7 @@ int test_v4_check(__maybe_unused struct xdp_md *ctx)
test_init();

TEST("setup", {
info = ipcache_lookup4(&IPCACHE_MAP, bpf_htonl(HOST_IP), V4_CACHE_KEY_LEN);
info = ipcache_lookup4(&IPCACHE_MAP, bpf_htonl(HOST_IP), V4_CACHE_KEY_LEN, 0);
assert(info);
});

Expand Down Expand Up @@ -348,7 +348,7 @@ int test_v6_check(__maybe_unused struct xdp_md *ctx)
test_init();

TEST("setup", {
info = ipcache_lookup6(&IPCACHE_MAP, &HOST_IP6, V6_CACHE_KEY_LEN);
info = ipcache_lookup6(&IPCACHE_MAP, &HOST_IP6, V6_CACHE_KEY_LEN, 0);
assert(info);
});

Expand Down