bpftool: Update btf_dump__new() and perf_buffer__new_raw() calls

Use v1.0-compatible variants of btf_dump and perf_buffer "constructors".
This is also a demonstration of reusing struct perf_buffer_raw_opts as
OPTS-style option struct for new perf_buffer__new_raw() API.
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20211111053624.190580-10-andrii@kernel.org

tools/bpf/bpftool/btf.c

@@ -418,7 +418,7 @@ static int dump_btf_c(const struct btf *btf,
 	struct btf_dump *d;
 	int err = 0, i;
 
-	d = btf_dump__new(btf, NULL, NULL, btf_dump_printf);
+	d = btf_dump__new(btf, btf_dump_printf, NULL, NULL);
 	if (IS_ERR(d))
 		return PTR_ERR(d);
 

tools/bpf/bpftool/gen.c

@@ -218,7 +218,7 @@ static int codegen_datasecs(struct bpf_object *obj, const char *obj_name)
 	char sec_ident[256], map_ident[256];
 	int i, err = 0;
 
-	d = btf_dump__new(btf, NULL, NULL, codegen_btf_dump_printf);
+	d = btf_dump__new(btf, codegen_btf_dump_printf, NULL, NULL);
 	if (IS_ERR(d))
 		return PTR_ERR(d);
 

tools/bpf/bpftool/map_perf_ring.c

@@ -124,7 +124,7 @@ int do_event_pipe(int argc, char **argv)
 		.wakeup_events = 1,
 	};
 	struct bpf_map_info map_info = {};
-	struct perf_buffer_raw_opts opts = {};
+	LIBBPF_OPTS(perf_buffer_raw_opts, opts);
 	struct event_pipe_ctx ctx = {
 		.all_cpus = true,
 		.cpu = -1,
@@ -190,14 +190,11 @@ int do_event_pipe(int argc, char **argv)
 		ctx.idx = 0;
 	}
 
-	opts.attr = &perf_attr;
-	opts.event_cb = print_bpf_output;
-	opts.ctx = &ctx;
 	opts.cpu_cnt = ctx.all_cpus ? 0 : 1;
 	opts.cpus = &ctx.cpu;
 	opts.map_keys = &ctx.idx;
-
-	pb = perf_buffer__new_raw(map_fd, MMAP_PAGE_CNT, &opts);
+	pb = perf_buffer__new_raw(map_fd, MMAP_PAGE_CNT, &perf_attr,
+				  print_bpf_output, &ctx, &opts);
 	err = libbpf_get_error(pb);
 	if (err) {
 		p_err("failed to create perf buffer: %s (%d)",