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libbpf: Migrate internal use of bpf_program__get_prog_info_linear

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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
This commit is contained in:
Dave Marchevsky
2021-10-11 01:20:28 -07:00
committed by Andrii Nakryiko
parent 0f3ba10651
commit 50028712c4
1 changed files with 10 additions and 12 deletions
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22
src/libbpf.c
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@@ -8462,28 +8462,27 @@ int libbpf_find_vmlinux_btf_id(const char *name,
static int libbpf_find_prog_btf_id(const char *name, __u32 attach_prog_fd) 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; struct btf *btf;
int err; int err;
info_linear = bpf_program__get_prog_info_linear(attach_prog_fd, 0); err = bpf_obj_get_info_by_fd(attach_prog_fd, &info, &info_len);
err = libbpf_get_error(info_linear);
if (err) { if (err) {
pr_warn("failed get_prog_info_linear for FD %d\n", pr_warn("failed bpf_obj_get_info_by_fd for FD %d: %d\n",
attach_prog_fd); attach_prog_fd, err);
return err; return err;
} }
err = -EINVAL; err = -EINVAL;
info = &info_linear->info; if (!info.btf_id) {
if (!info->btf_id) {
pr_warn("The target program doesn't have BTF\n"); pr_warn("The target program doesn't have BTF\n");
goto out; goto out;
} }
btf = btf__load_from_kernel_by_id(info->btf_id); btf = btf__load_from_kernel_by_id(info.btf_id);
if (libbpf_get_error(btf)) { err = libbpf_get_error(btf);
pr_warn("Failed to get BTF of the program\n"); if (err) {
pr_warn("Failed to get BTF %d of the program: %d\n", info.btf_id, err);
goto out; goto out;
} }
err = btf__find_by_name_kind(btf, name, BTF_KIND_FUNC); err = btf__find_by_name_kind(btf, name, BTF_KIND_FUNC);
@@ -8493,7 +8492,6 @@ static int libbpf_find_prog_btf_id(const char *name, __u32 attach_prog_fd)
goto out; goto out;
} }
out: out:
free(info_linear);
return err; return err;
} }