pin ebpf map

pin map so when xdp-loader load then unload, and load again, the same map can be reused. Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>
vincentmli · Sep 3, 2024 · 6c972a1 · 6c972a1
1 parent ad3bc83
commit 6c972a1
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diff --git a/xdp-dnsrrl/xdp_dnsrrl.bpf.c b/xdp-dnsrrl/xdp_dnsrrl.bpf.c
@@ -101,13 +101,15 @@ struct {
 	__type(key,   __u32);
 	__type(value, struct bucket_time);
 	__uint(max_entries, RRL_SIZE);
+	__uint(pinning, LIBBPF_PIN_BY_NAME);
 } state_map __section(".maps");
 
 struct {
 	__uint(type,  BPF_MAP_TYPE_PERCPU_HASH);
 	__type(key,   sizeof(struct in6_addr));
 	__type(value, struct bucket_time);
 	__uint(max_entries, RRL_SIZE);
+	__uint(pinning, LIBBPF_PIN_BY_NAME);
 } state_map_v6 __section(".maps");
 
 

diff --git a/xdp-synproxy/xdp_synproxy.bpf.c b/xdp-synproxy/xdp_synproxy.bpf.c
@@ -78,13 +78,15 @@ struct {
 	__type(key, __u32);
 	__type(value, __u64);
 	__uint(max_entries, 2);
+	__uint(pinning, LIBBPF_PIN_BY_NAME);
 } values SEC(".maps");
 
 struct {
 	__uint(type, BPF_MAP_TYPE_ARRAY);
 	__type(key, __u32);
 	__type(value, __u16);
 	__uint(max_entries, MAX_ALLOWED_PORTS);
+	__uint(pinning, LIBBPF_PIN_BY_NAME);
 } allowed_ports SEC(".maps");
 
 /* Some symbols defined in net/netfilter/nf_conntrack_bpf.c are unavailable in

diff --git a/xdp-udp/xdp_udp.bpf.c b/xdp-udp/xdp_udp.bpf.c
@@ -72,6 +72,7 @@ struct {
         __type(key, __u32);
         __type(value, __u16);
         __uint(max_entries, MAX_ALLOWED_PORTS);
+	__uint(pinning, LIBBPF_PIN_BY_NAME);
 } udp_ports SEC(".maps");
 
 
@@ -88,6 +89,7 @@ struct {
 	__type(key,   __u32);
 	__type(value, struct bucket_time);
 	__uint(max_entries, RRL_SIZE);
+	__uint(pinning, LIBBPF_PIN_BY_NAME);
 } udp_state_map __section(".maps");
 
 /** Copied from the kernel module of the base03-map-counter example of the