[PATCH v3 bpf-next 13/14] libbpf: add BPF token support to bpf_prog_load() API

From: Andrii Nakryiko <andrii@kernel.org>
To: <bpf@vger.kernel.org>
Cc: <linux-security-module@vger.kernel.org>, <keescook@chromium.org>,
	<brauner@kernel.org>, <lennart@poettering.net>,
	<cyphar@cyphar.com>, <luto@kernel.org>, <kernel-team@meta.com>,
	<sargun@sargun.me>
Subject: [PATCH v3 bpf-next 13/14] libbpf: add BPF token support to bpf_prog_load() API
Date: Wed, 21 Jun 2023 16:38:08 -0700	[thread overview]
Message-ID: <20230621233809.1941811-14-andrii@kernel.org> (raw)
In-Reply-To: <20230621233809.1941811-1-andrii@kernel.org>

Wire through token_fd into bpf_prog_load(). Also make sure to pass
allowed_{prog,attach}_types to kernel in bpf_token_create().

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
---
 tools/lib/bpf/bpf.c | 5 ++++-
 tools/lib/bpf/bpf.h | 7 +++++--
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 6fb915069be7..5f331bbf1ad2 100644
--- a/tools/lib/bpf/bpf.c
+++ b/tools/lib/bpf/bpf.c
@@ -234,7 +234,7 @@ int bpf_prog_load(enum bpf_prog_type prog_type,
 		  const struct bpf_insn *insns, size_t insn_cnt,
 		  struct bpf_prog_load_opts *opts)
 {
-	const size_t attr_sz = offsetofend(union bpf_attr, log_true_size);
+	const size_t attr_sz = offsetofend(union bpf_attr, prog_token_fd);
 	void *finfo = NULL, *linfo = NULL;
 	const char *func_info, *line_info;
 	__u32 log_size, log_level, attach_prog_fd, attach_btf_obj_fd;
@@ -263,6 +263,7 @@ int bpf_prog_load(enum bpf_prog_type prog_type,
 	attr.prog_flags = OPTS_GET(opts, prog_flags, 0);
 	attr.prog_ifindex = OPTS_GET(opts, prog_ifindex, 0);
 	attr.kern_version = OPTS_GET(opts, kern_version, 0);
+	attr.prog_token_fd = OPTS_GET(opts, token_fd, 0);
 
 	if (prog_name && kernel_supports(NULL, FEAT_PROG_NAME))
 		libbpf_strlcpy(attr.prog_name, prog_name, sizeof(attr.prog_name));
@@ -1223,6 +1224,8 @@ int bpf_token_create(int pin_path_fd, const char *pin_pathname, struct bpf_token
 	attr.token_create.pin_flags = OPTS_GET(opts, pin_flags, 0);
 	attr.token_create.allowed_cmds = OPTS_GET(opts, allowed_cmds, 0);
 	attr.token_create.allowed_map_types = OPTS_GET(opts, allowed_map_types, 0);
+	attr.token_create.allowed_prog_types = OPTS_GET(opts, allowed_prog_types, 0);
+	attr.token_create.allowed_attach_types = OPTS_GET(opts, allowed_attach_types, 0);
 
 	ret = sys_bpf(BPF_TOKEN_CREATE, &attr, attr_sz);
 	return libbpf_err_errno(ret);
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index dc7c4af21ad9..2ac56fba6027 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -104,9 +104,10 @@ struct bpf_prog_load_opts {
 	 * If kernel doesn't support this feature, log_size is left unchanged.
 	 */
 	__u32 log_true_size;
+	__u32 token_fd;
 	size_t :0;
 };
-#define bpf_prog_load_opts__last_field log_true_size
+#define bpf_prog_load_opts__last_field token_fd
 
 LIBBPF_API int bpf_prog_load(enum bpf_prog_type prog_type,
 			     const char *prog_name, const char *license,
@@ -561,9 +562,11 @@ struct bpf_token_create_opts {
 	__u32 pin_flags;
 	__u64 allowed_cmds;
 	__u64 allowed_map_types;
+	__u64 allowed_prog_types;
+	__u64 allowed_attach_types;
 	size_t :0;
 };
-#define bpf_token_create_opts__last_field allowed_map_types
+#define bpf_token_create_opts__last_field allowed_attach_types
 
 /**
  * @brief **bpf_token_create()** creates a new instance of BPF token, pinning
-- 
2.34.1

