From: Dave Marchevsky <davemarchevsky@fb.com>
Date: Mon, 11 Oct 2021 01:20:28 -0700
Subject: libbpf: Migrate internal use of bpf_program__get_prog_info_linear
Patch-mainline: v5.16-rc1
Git-commit: ebc7b50a3849d73665013573cf3c09f27fb14fde
References: jsc#PED-1377
In preparation for bpf_program__get_prog_info_linear deprecation, move
the single use in libbpf to call bpf_obj_get_info_by_fd directly.
Signed-off-by: Dave Marchevsky <davemarchevsky@fb.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211011082031.4148337-2-davemarchevsky@fb.com
Acked-by: Shung-Hsi Yu <shung-hsi.yu@suse.com>
---
tools/lib/bpf/libbpf.c | 22 ++++++++++------------
1 file changed, 10 insertions(+), 12 deletions(-)
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -8462,28 +8462,27 @@ int libbpf_find_vmlinux_btf_id(const cha
static int libbpf_find_prog_btf_id(const char *name, __u32 attach_prog_fd)
{
- struct bpf_prog_info_linear *info_linear;
- struct bpf_prog_info *info;
+ struct bpf_prog_info info = {};
+ __u32 info_len = sizeof(info);
struct btf *btf;
int err;
- info_linear = bpf_program__get_prog_info_linear(attach_prog_fd, 0);
- err = libbpf_get_error(info_linear);
+ err = bpf_obj_get_info_by_fd(attach_prog_fd, &info, &info_len);
if (err) {
- pr_warn("failed get_prog_info_linear for FD %d\n",
- attach_prog_fd);
+ pr_warn("failed bpf_obj_get_info_by_fd for FD %d: %d\n",
+ attach_prog_fd, err);
return err;
}
err = -EINVAL;
- info = &info_linear->info;
- if (!info->btf_id) {
+ if (!info.btf_id) {
pr_warn("The target program doesn't have BTF\n");
goto out;
}
- btf = btf__load_from_kernel_by_id(info->btf_id);
- if (libbpf_get_error(btf)) {
- pr_warn("Failed to get BTF of the program\n");
+ btf = btf__load_from_kernel_by_id(info.btf_id);
+ err = libbpf_get_error(btf);
+ if (err) {
+ pr_warn("Failed to get BTF %d of the program: %d\n", info.btf_id, err);
goto out;
}
err = btf__find_by_name_kind(btf, name, BTF_KIND_FUNC);
@@ -8493,7 +8492,6 @@ static int libbpf_find_prog_btf_id(const
goto out;
}
out:
- free(info_linear);
return err;
}