[PATCH bpf-next v8 2/4] libbpf: Init fd_array when prog probe load

Tao Chen
2025-02-21T16:36:15Z

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

Cc: Tao Chen <dylane.chen@didiglobal.com>
Reviewed-by: Jiri Olsa <jolsa@kernel.org>
Reviewed-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Tao Chen <chen.dylane@linux.dev>
---
tools/lib/bpf/libbpf_probes.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/lib/bpf/libbpf_probes.c b/tools/lib/bpf/libbpf_probes.c
index a48a557314f6..de2b1205b436 100644
--- a/tools/lib/bpf/libbpf_probes.c
+++ b/tools/lib/bpf/libbpf_probes.c
@@ -102,12 +102,13 @@ __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,
- char *log_buf, size_t log_buf_sz)
+ int *fd_array, 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,
);
int fd, err, exp_err = 0;
const char *exp_msg = NULL;
@@ -214,7 +215,7 @@ 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, NULL, 0);
return libbpf_err(ret);
}

@@ -448,7 +449,7 @@ int libbpf_probe_bpf_helper(enum bpf_prog_type prog_type, enum bpf_func_id helpe
return libbpf_err(-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, buf, sizeof(buf));
if (ret < 0)
return libbpf_err(ret);

--
2.43.0