netdev - [PATCH bpf-next v3 2/3] bpftool: don't append / to the progtype

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Message-Id: <20211020225005.2986729-3-sdf@google.com>
Date:   Wed, 20 Oct 2021 15:50:04 -0700
From:   Stanislav Fomichev <sdf@...gle.com>
To:     netdev@...r.kernel.org, bpf@...r.kernel.org
Cc:     ast@...nel.org, daniel@...earbox.net, andrii@...nel.org,
        Stanislav Fomichev <sdf@...gle.com>,
        Quentin Monnet <quentin@...valent.com>
Subject: [PATCH bpf-next v3 2/3] bpftool: don't append / to the progtype

Otherwise, attaching with bpftool doesn't work with strict section names.

Also, switch to libbpf strict mode to use the latest conventions
(note, I don't think we have any cli api guarantees?).

Cc: Quentin Monnet <quentin@...valent.com>
Signed-off-by: Stanislav Fomichev <sdf@...gle.com>
---
 tools/bpf/bpftool/main.c |  4 ++++
 tools/bpf/bpftool/prog.c | 15 +--------------
 2 files changed, 5 insertions(+), 14 deletions(-)

diff --git a/tools/bpf/bpftool/main.c b/tools/bpf/bpftool/main.c
index 02eaaf065f65..8223bac1e401 100644
--- a/tools/bpf/bpftool/main.c
+++ b/tools/bpf/bpftool/main.c
@@ -409,6 +409,10 @@ int main(int argc, char **argv)
 	block_mount = false;
 	bin_name = argv[0];
 
+	ret = libbpf_set_strict_mode(LIBBPF_STRICT_ALL);
+	if (ret)
+		p_err("failed to enable libbpf strict mode: %d", ret);
+
 	hash_init(prog_table.table);
 	hash_init(map_table.table);
 	hash_init(link_table.table);
diff --git a/tools/bpf/bpftool/prog.c b/tools/bpf/bpftool/prog.c
index 277d51c4c5d9..17505dc1243e 100644
--- a/tools/bpf/bpftool/prog.c
+++ b/tools/bpf/bpftool/prog.c
@@ -1396,8 +1396,6 @@ static int load_with_options(int argc, char **argv, bool first_prog_only)
 
 	while (argc) {
 		if (is_prefix(*argv, "type")) {
-			char *type;
-
 			NEXT_ARG();
 
 			if (common_prog_type != BPF_PROG_TYPE_UNSPEC) {
@@ -1407,19 +1405,8 @@ static int load_with_options(int argc, char **argv, bool first_prog_only)
 			if (!REQ_ARGS(1))
 				goto err_free_reuse_maps;
 
-			/* Put a '/' at the end of type to appease libbpf */
-			type = malloc(strlen(*argv) + 2);
-			if (!type) {
-				p_err("mem alloc failed");
-				goto err_free_reuse_maps;
-			}
-			*type = 0;
-			strcat(type, *argv);
-			strcat(type, "/");
-
-			err = get_prog_type_by_name(type, &common_prog_type,
+			err = get_prog_type_by_name(*argv, &common_prog_type,
 						    &expected_attach_type);
-			free(type);
 			if (err < 0)
 				goto err_free_reuse_maps;
 
-- 
2.33.0.1079.g6e70778dc9-goog