tetra: Add debug progs command

bpf/Makefile

@@ -34,7 +34,8 @@ PROCESS = bpf_execve_event.o bpf_execve_event_v53.o bpf_fork.o bpf_exit.o bpf_ge
 	  bpf_loader.o \
 	  bpf_cgroup.o \
 	  bpf_enforcer.o bpf_multi_enforcer.o bpf_fmodret_enforcer.o \
-	  bpf_map_test_p1.o bpf_map_test_p2.o bpf_map_test_p3.o
+	  bpf_map_test_p1.o bpf_map_test_p2.o bpf_map_test_p3.o \
+	  bpf_prog_iter.o
 
 CGROUP = bpf_cgroup_mkdir.o bpf_cgroup_rmdir.o bpf_cgroup_release.o
 BPFTEST = bpf_lseek.o

bpf/include/api.h

@@ -273,6 +273,8 @@ static long BPF_FUNC(sock_ops_cb_flags_set, struct bpf_sock_ops *bpf_sock, int a
 static long BPF_FUNC(ima_file_hash, struct file *file, void *dst, uint32_t size);
 static long BPF_FUNC(ima_inode_hash, struct inode *inode, void *dst, uint32_t size);
 
+static int BPF_FUNC(seq_write, struct seq_file *m, const void *data, uint32_t len);
+
 /** LLVM built-ins, mem*() routines work for constant size */
 
 #ifndef lock_xadd

bpf/include/vmlinux.h

@@ -33383,6 +33383,15 @@ struct bpf_iter_seq_task_file_info {
 	u32 fd;
 };
 
+struct bpf_iter__bpf_prog {
+	union {
+		struct bpf_iter_meta *meta;
+	};
+	union {
+		struct bpf_prog *prog;
+	};
+};
+
 struct bpf_iter__task_file {
 	union {
 		struct bpf_iter_meta *meta;

bpf/process/bpf_prog_iter.c

@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/* Copyright Authors of Cilium */
+
+#include "vmlinux.h"
+#include "bpf_helpers.h"
+
+SEC("iter/bpf_prog")
+int iter(struct bpf_iter__bpf_prog *ctx)
+{
+	struct bpf_prog *prog = ctx->prog;
+	__u32 id;
+
+	if (!prog)
+		return 0;
+
+	_(id = prog->aux->id);
+	seq_write(ctx->meta->seq, &id, sizeof(id));
+	return 0;
+}
+
+char LICENSE[] SEC("license") = "Dual BSD/GPL";

cmd/tetra/debug/debug.go

@@ -15,5 +15,6 @@ func New() *cobra.Command {
 	}
 	cmd.AddCommand(NewMapCmd())
 	cmd.AddCommand(NewDumpCommand())
+	cmd.AddCommand(NewProgsCmd())
 	return &cmd
 }