netdev - [PATCH v6 bpf-next 12/13] libbpf: add BPF token support to bpf_prog

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Message-ID: <20230927225809.2049655-13-andrii@kernel.org>
Date: Wed, 27 Sep 2023 15:58:08 -0700
From: Andrii Nakryiko <andrii@...nel.org>
To: <bpf@...r.kernel.org>, <netdev@...r.kernel.org>
CC: <linux-fsdevel@...r.kernel.org>, <linux-security-module@...r.kernel.org>,
        <keescook@...omium.org>, <brauner@...nel.org>,
        <lennart@...ttering.net>, <kernel-team@...a.com>, <sargun@...gun.me>
Subject: [PATCH v6 bpf-next 12/13] libbpf: add BPF token support to bpf_prog_load() API

Wire through token_fd into bpf_prog_load().

Signed-off-by: Andrii Nakryiko <andrii@...nel.org>
---
 tools/lib/bpf/bpf.c | 3 ++-
 tools/lib/bpf/bpf.h | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c
index 4547ae1037af..5a238831b4ff 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));
diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h
index d7df5543f402..edc0cab465d6 100644
--- a/tools/lib/bpf/bpf.h
+++ b/tools/lib/bpf/bpf.h
@@ -105,9 +105,10 @@ 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,
-- 
2.34.1