linux-kernel - [PATCH bpf-next v4 2/4] libbpf: Init fd

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Message-Id: <20250206051557.27913-3-chen.dylane@gmail.com>
Date: Thu,  6 Feb 2025 13:15:55 +0800
From: Tao Chen <chen.dylane@...il.com>
To: ast@...nel.org,
	daniel@...earbox.net,
	andrii@...nel.org,
	eddyz87@...il.com,
	haoluo@...gle.com,
	jolsa@...nel.org,
	qmo@...nel.org
Cc: bpf@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	chen.dylane@...il.com
Subject: [PATCH bpf-next v4 2/4] libbpf: Init fd_array when prog probe load

fd_array used to store module btf fd, which will
be used for kfunc probe in module btf.

Signed-off-by: Tao Chen <chen.dylane@...il.com>
---
 tools/lib/bpf/libbpf_probes.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/tools/lib/bpf/libbpf_probes.c b/tools/lib/bpf/libbpf_probes.c
index aeb4fd97d801..e142130cb83c 100644
--- a/tools/lib/bpf/libbpf_probes.c
+++ b/tools/lib/bpf/libbpf_probes.c
@@ -102,12 +102,15 @@ __u32 get_kernel_version(void)
 
 static int probe_prog_load(enum bpf_prog_type prog_type,
 			   const struct bpf_insn *insns, size_t insns_cnt,
+			   int *fd_array, size_t fd_array_cnt,
 			   char *log_buf, size_t log_buf_sz)
 {
 	LIBBPF_OPTS(bpf_prog_load_opts, opts,
 		.log_buf = log_buf,
 		.log_size = log_buf_sz,
 		.log_level = log_buf ? 1 : 0,
+		.fd_array = fd_array,
+		.fd_array_cnt = fd_array_cnt,
 	);
 	int fd, err, exp_err = 0;
 	const char *exp_msg = NULL;
@@ -214,7 +217,7 @@ int libbpf_probe_bpf_prog_type(enum bpf_prog_type prog_type, const void *opts)
 	if (opts)
 		return libbpf_err(-EINVAL);
 
-	ret = probe_prog_load(prog_type, insns, insn_cnt, NULL, 0);
+	ret = probe_prog_load(prog_type, insns, insn_cnt, NULL, 0, NULL, 0);
 	return libbpf_err(ret);
 }
 
@@ -448,7 +451,7 @@ int libbpf_probe_bpf_helper(enum bpf_prog_type prog_type, enum bpf_func_id helpe
 		return -EOPNOTSUPP;
 
 	buf[0] = '\0';
-	ret = probe_prog_load(prog_type, insns, insn_cnt, buf, sizeof(buf));
+	ret = probe_prog_load(prog_type, insns, insn_cnt, NULL, 0, buf, sizeof(buf));
 	if (ret < 0)
 		return libbpf_err(ret);
 
-- 
2.43.0