Make sure compiler_meta__->drop starts out false (#4722)

* Make sure drop starts out false

We found scenarios where the skb->cb is not zeroed out before the bpf
program is called. Since compiler_meta__ = skb->cb, there is an issue in
some specific scenarios. For example, since the bpf code looks at
compiler_meta__->drop to tell whether the packet should be dropped or not,
if by any chance compiler_meta__->drop is initialised to true, the
program will mistakenly drop the packet. To solve this, we are
initialising compiler_meta__->drop to false before doing any
processing on compiler_meta__->drop.

* Adapt test cases to compiler_meta__->drop initialisation

---------

Co-authored-by: Mouse <mouse@mojatatu.com>

backends/tc/ebpfCodeGen.cpp

@@ -453,6 +453,11 @@ void TCIngressPipelinePNA::emitGlobalMetadataInitializer(EBPF::CodeBuilder *buil
     builder->append("if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;");
     builder->newline();
 
+    // Make sure drop starts out false
+    builder->emitIndent();
+    builder->append("compiler_meta__->drop = false;");
+    builder->newline();
+
     // workaround to make TC protocol-independent, DO NOT REMOVE
     builder->emitIndent();
     // replace ether_type only if a packet comes from XDP

testdata/p4tc_samples_outputs/add_entry_1_example_control_blocks.c

@@ -293,6 +293,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/add_entry_3_example_control_blocks.c

@@ -293,6 +293,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/add_entry_example_control_blocks.c

@@ -366,6 +366,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/calculator_control_blocks.c

@@ -308,6 +308,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/checksum_control_blocks.c

@@ -264,6 +264,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/const_entries_range_mask_control_blocks.c

@@ -129,6 +129,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/default_action_example_01_control_blocks.c

@@ -322,6 +322,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/default_action_example_control_blocks.c

@@ -342,6 +342,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/default_action_with_param_01_control_blocks.c

@@ -342,6 +342,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/default_action_with_param_control_blocks.c

@@ -342,6 +342,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/default_hit_const_example_control_blocks.c

@@ -189,6 +189,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/direct_counter_example_control_blocks.c

@@ -278,6 +278,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/drop_packet_example_control_blocks.c

@@ -265,6 +265,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/global_action_example_01_control_blocks.c

@@ -337,6 +337,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/global_action_example_02_control_blocks.c

@@ -339,6 +339,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/hash1_control_blocks.c

@@ -164,6 +164,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/indirect_counter_01_example_control_blocks.c

@@ -281,6 +281,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/ipip_control_blocks.c

@@ -388,6 +388,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/matchtype_control_blocks.c

@@ -491,6 +491,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/mix_matchtype_example_control_blocks.c

@@ -498,6 +498,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/multiple_tables_example_01_control_blocks.c

@@ -748,6 +748,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/multiple_tables_example_02_control_blocks.c

@@ -748,6 +748,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/name_annotation_example_control_blocks.c

@@ -340,6 +340,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/no_table_example_control_blocks.c

@@ -232,6 +232,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/noaction_example_01_control_blocks.c

@@ -340,6 +340,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/noaction_example_02_control_blocks.c

@@ -316,6 +316,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/nummask_annotation_example_control_blocks.c

@@ -184,6 +184,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/send_to_port_example_control_blocks.c

@@ -295,6 +295,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/set_entry_timer_example_control_blocks.c

@@ -350,6 +350,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/simple_exact_example_control_blocks.c

@@ -266,6 +266,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/simple_extern_example_control_blocks.c

@@ -317,6 +317,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/simple_lpm_example_control_blocks.c

@@ -264,6 +264,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/simple_ternary_example_control_blocks.c

@@ -271,6 +271,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/size_param_example_control_blocks.c

@@ -340,6 +340,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/tc_may_override_example_01_control_blocks.c

@@ -360,6 +360,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/tc_may_override_example_02_control_blocks.c

@@ -342,6 +342,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/tc_may_override_example_03_control_blocks.c

@@ -342,6 +342,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/tc_may_override_example_04_control_blocks.c

@@ -354,6 +354,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/tc_may_override_example_05_control_blocks.c

@@ -351,6 +351,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/tc_may_override_example_06_control_blocks.c

@@ -360,6 +360,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/tc_may_override_example_07_control_blocks.c

@@ -369,6 +369,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/tc_may_override_example_08_control_blocks.c

@@ -369,6 +369,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;

testdata/p4tc_samples_outputs/tc_may_override_example_09_control_blocks.c

@@ -360,6 +360,7 @@ SEC("p4tc/main")
 int tc_ingress_func(struct __sk_buff *skb) {
     struct pna_global_metadata *compiler_meta__ = (struct pna_global_metadata *) skb->cb;
     if (compiler_meta__->pass_to_kernel == true) return TC_ACT_OK;
+    compiler_meta__->drop = false;
     if (!compiler_meta__->recirculated) {
         compiler_meta__->mark = 153;
         struct internal_metadata *md = (struct internal_metadata *)(unsigned long)skb->data_meta;