bpftool: Using the right format specifiers

Fixed some formatting specifiers errors, such as using %d for int and %u
for unsigned int, as well as other byte-length types.

Signed-off-by: Jiayuan Chen <mrpre@163.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Quentin Monnet <qmo@kernel.org>
Link: https://lore.kernel.org/bpf/20250207123706.727928-2-mrpre@163.com

Author: mrpre

tools/bpf/bpftool/gen.c

@@ -670,7 +670,7 @@ static void codegen_destroy(struct bpf_object *obj, const char *obj_name)
 			continue;
 		if (bpf_map__is_internal(map) &&
 		    (bpf_map__map_flags(map) & BPF_F_MMAPABLE))
-			printf("\tskel_free_map_data(skel->%1$s, skel->maps.%1$s.initial_value, %2$zd);\n",
+			printf("\tskel_free_map_data(skel->%1$s, skel->maps.%1$s.initial_value, %2$zu);\n",
 			       ident, bpf_map_mmap_sz(map));
 		codegen("\
 			\n\
@@ -984,7 +984,7 @@ static int walk_st_ops_shadow_vars(struct btf *btf, const char *ident,
 
 		offset = m->offset / 8;
 		if (next_offset < offset)
-			printf("\t\t\tchar __padding_%d[%d];\n", i, offset - next_offset);
+			printf("\t\t\tchar __padding_%d[%u];\n", i, offset - next_offset);
 
 		switch (btf_kind(member_type)) {
 		case BTF_KIND_INT:
@@ -1052,7 +1052,7 @@ static int walk_st_ops_shadow_vars(struct btf *btf, const char *ident,
 	/* Cannot fail since it must be a struct type */
 	size = btf__resolve_size(btf, map_type_id);
 	if (next_offset < (__u32)size)
-		printf("\t\t\tchar __padding_end[%d];\n", size - next_offset);
+		printf("\t\t\tchar __padding_end[%u];\n", size - next_offset);
 
 out:
 	btf_dump__free(d);
@@ -2095,7 +2095,7 @@ btfgen_mark_type(struct btfgen_info *info, unsigned int type_id, bool follow_poi
 		break;
 	/* tells if some other type needs to be handled */
 	default:
-		p_err("unsupported kind: %s (%d)", btf_kind_str(btf_type), type_id);
+		p_err("unsupported kind: %s (%u)", btf_kind_str(btf_type), type_id);
 		return -EINVAL;
 	}
 
@@ -2147,7 +2147,7 @@ static int btfgen_record_field_relo(struct btfgen_info *info, struct bpf_core_sp
 			btf_type = btf__type_by_id(btf, type_id);
 			break;
 		default:
-			p_err("unsupported kind: %s (%d)",
+			p_err("unsupported kind: %s (%u)",
 			      btf_kind_str(btf_type), btf_type->type);
 			return -EINVAL;
 		}
@@ -2246,7 +2246,7 @@ static int btfgen_mark_type_match(struct btfgen_info *info, __u32 type_id, bool
 	}
 	/* tells if some other type needs to be handled */
 	default:
-		p_err("unsupported kind: %s (%d)", btf_kind_str(btf_type), type_id);
+		p_err("unsupported kind: %s (%u)", btf_kind_str(btf_type), type_id);
 		return -EINVAL;
 	}
 

tools/bpf/bpftool/link.c

@@ -107,7 +107,7 @@ static int link_parse_fd(int *argc, char ***argv)
 
 		fd = bpf_link_get_fd_by_id(id);
 		if (fd < 0)
-			p_err("failed to get link with ID %d: %s", id, strerror(errno));
+			p_err("failed to get link with ID %u: %s", id, strerror(errno));
 		return fd;
 	} else if (is_prefix(**argv, "pinned")) {
 		char *path;
@@ -404,23 +404,23 @@ static char *perf_config_hw_cache_str(__u64 config)
 	if (hw_cache)
 		snprintf(str, PERF_HW_CACHE_LEN, "%s-", hw_cache);
 	else
-		snprintf(str, PERF_HW_CACHE_LEN, "%lld-", config & 0xff);
+		snprintf(str, PERF_HW_CACHE_LEN, "%llu-", config & 0xff);
 
 	op = perf_event_name(evsel__hw_cache_op, (config >> 8) & 0xff);
 	if (op)
 		snprintf(str + strlen(str), PERF_HW_CACHE_LEN - strlen(str),
 			 "%s-", op);
 	else
 		snprintf(str + strlen(str), PERF_HW_CACHE_LEN - strlen(str),
-			 "%lld-", (config >> 8) & 0xff);
+			 "%llu-", (config >> 8) & 0xff);
 
 	result = perf_event_name(evsel__hw_cache_result, config >> 16);
 	if (result)
 		snprintf(str + strlen(str), PERF_HW_CACHE_LEN - strlen(str),
 			 "%s", result);
 	else
 		snprintf(str + strlen(str), PERF_HW_CACHE_LEN - strlen(str),
-			 "%lld", config >> 16);
+			 "%llu", config >> 16);
 	return str;
 }
 
@@ -623,7 +623,7 @@ static void show_link_ifindex_plain(__u32 ifindex)
 	else
 		snprintf(devname, sizeof(devname), "(detached)");
 	if (ret)
-		snprintf(devname, sizeof(devname), "%s(%d)",
+		snprintf(devname, sizeof(devname), "%s(%u)",
 			 tmpname, ifindex);
 	printf("ifindex %s  ", devname);
 }
@@ -699,7 +699,7 @@ void netfilter_dump_plain(const struct bpf_link_info *info)
 	if (pfname)
 		printf("\n\t%s", pfname);
 	else
-		printf("\n\tpf: %d", pf);
+		printf("\n\tpf: %u", pf);
 
 	if (hookname)
 		printf(" %s", hookname);
@@ -773,7 +773,7 @@ static void show_uprobe_multi_plain(struct bpf_link_info *info)
 	printf("func_cnt %u  ", info->uprobe_multi.count);
 
 	if (info->uprobe_multi.pid)
-		printf("pid %d  ", info->uprobe_multi.pid);
+		printf("pid %u  ", info->uprobe_multi.pid);
 
 	printf("\n\t%-16s   %-16s   %-16s", "offset", "ref_ctr_offset", "cookies");
 	for (i = 0; i < info->uprobe_multi.count; i++) {

tools/bpf/bpftool/main.c

@@ -152,7 +152,7 @@ static int do_version(int argc, char **argv)
 			     BPFTOOL_MINOR_VERSION, BPFTOOL_PATCH_VERSION);
 #endif
 		jsonw_name(json_wtr, "libbpf_version");
-		jsonw_printf(json_wtr, "\"%d.%d\"",
+		jsonw_printf(json_wtr, "\"%u.%u\"",
 			     libbpf_major_version(), libbpf_minor_version());
 
 		jsonw_name(json_wtr, "features");
@@ -370,7 +370,7 @@ static int do_batch(int argc, char **argv)
 		while ((cp = strstr(buf, "\\\n")) != NULL) {
 			if (!fgets(contline, sizeof(contline), fp) ||
 			    strlen(contline) == 0) {
-				p_err("missing continuation line on command %d",
+				p_err("missing continuation line on command %u",
 				      lines);
 				err = -1;
 				goto err_close;
@@ -381,7 +381,7 @@ static int do_batch(int argc, char **argv)
 				*cp = '\0';
 
 			if (strlen(buf) + strlen(contline) + 1 > sizeof(buf)) {
-				p_err("command %d is too long", lines);
+				p_err("command %u is too long", lines);
 				err = -1;
 				goto err_close;
 			}
@@ -423,7 +423,7 @@ static int do_batch(int argc, char **argv)
 		err = -1;
 	} else {
 		if (!json_output)
-			printf("processed %d commands\n", lines);
+			printf("processed %u commands\n", lines);
 	}
 err_close:
 	if (fp != stdin)

tools/bpf/bpftool/map.c

@@ -285,7 +285,7 @@ static void print_entry_plain(struct bpf_map_info *info, unsigned char *key,
 		}
 		if (info->value_size) {
 			for (i = 0; i < n; i++) {
-				printf("value (CPU %02d):%c",
+				printf("value (CPU %02u):%c",
 				       i, info->value_size > 16 ? '\n' : ' ');
 				fprint_hex(stdout, value + i * step,
 					   info->value_size, " ");
@@ -316,7 +316,7 @@ static char **parse_bytes(char **argv, const char *name, unsigned char *val,
 	}
 
 	if (i != n) {
-		p_err("%s expected %d bytes got %d", name, n, i);
+		p_err("%s expected %u bytes got %u", name, n, i);
 		return NULL;
 	}
 
@@ -462,7 +462,7 @@ static void show_map_header_json(struct bpf_map_info *info, json_writer_t *wtr)
 		jsonw_string_field(wtr, "name", info->name);
 
 	jsonw_name(wtr, "flags");
-	jsonw_printf(wtr, "%d", info->map_flags);
+	jsonw_printf(wtr, "%u", info->map_flags);
 }
 
 static int show_map_close_json(int fd, struct bpf_map_info *info)
@@ -588,7 +588,7 @@ static int show_map_close_plain(int fd, struct bpf_map_info *info)
 			if (prog_type_str)
 				printf("owner_prog_type %s  ", prog_type_str);
 			else
-				printf("owner_prog_type %d  ", prog_type);
+				printf("owner_prog_type %u  ", prog_type);
 		}
 		if (owner_jited)
 			printf("owner%s jited",
@@ -615,7 +615,7 @@ static int show_map_close_plain(int fd, struct bpf_map_info *info)
 		printf("\n\t");
 
 	if (info->btf_id)
-		printf("btf_id %d", info->btf_id);
+		printf("btf_id %u", info->btf_id);
 
 	if (frozen)
 		printf("%sfrozen", info->btf_id ? "  " : "");