The bpf_prog_load() function will guess program type if it's not
specified explicitly. This functionality will be used to implement
loading of different programs without asking a user to specify
the program type. In first order it will be used by bpftool.
Signed-off-by: Roman Gushchin <g...@fb.com>
Cc: Alexei Starovoitov <a...@kernel.org>
Cc: Daniel Borkmann <dan...@iogearbox.net>
Cc: Jakub Kicinski <jakub.kicin...@netronome.com>
---
tools/lib/bpf/libbpf.c | 47 +++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 47 insertions(+)
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index 5aa45f89da93..9f2410beaa18 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -1721,6 +1721,41 @@ BPF_PROG_TYPE_FNS(tracepoint, BPF_PROG_TYPE_TRACEPOINT);
BPF_PROG_TYPE_FNS(xdp, BPF_PROG_TYPE_XDP);
BPF_PROG_TYPE_FNS(perf_event, BPF_PROG_TYPE_PERF_EVENT);
+static enum bpf_prog_type bpf_program__guess_type(struct bpf_program *prog)
+{
+ if (!prog->section_name)
+ goto err;
+
+ if (strncmp(prog->section_name, "socket", 6) == 0)
+ return BPF_PROG_TYPE_SOCKET_FILTER;
+ if (strncmp(prog->section_name, "kprobe/", 7) == 0)
+ return BPF_PROG_TYPE_KPROBE;
+ if (strncmp(prog->section_name, "kretprobe/", 10) == 0)
+ return BPF_PROG_TYPE_KPROBE;
+ if (strncmp(prog->section_name, "tracepoint/", 11) == 0)
+ return BPF_PROG_TYPE_TRACEPOINT;
+ if (strncmp(prog->section_name, "xdp", 3) == 0)
+ return BPF_PROG_TYPE_XDP;
+ if (strncmp(prog->section_name, "perf_event", 10) == 0)
+ return BPF_PROG_TYPE_PERF_EVENT;
+ if (strncmp(prog->section_name, "cgroup/skb", 10) == 0)
+ return BPF_PROG_TYPE_CGROUP_SKB;
+ if (strncmp(prog->section_name, "cgroup/sock", 11) == 0)
+ return BPF_PROG_TYPE_CGROUP_SOCK;
+ if (strncmp(prog->section_name, "cgroup/dev", 10) == 0)
+ return BPF_PROG_TYPE_CGROUP_DEVICE;
+ if (strncmp(prog->section_name, "sockops", 7) == 0)
+ return BPF_PROG_TYPE_SOCK_OPS;
+ if (strncmp(prog->section_name, "sk_skb", 6) == 0)
+ return BPF_PROG_TYPE_SK_SKB;
+
+err:
+ pr_warning("failed to guess program type based on section name %s\n",
+ prog->section_name);
+
+ return BPF_PROG_TYPE_UNSPEC;
+}
+
int bpf_map__fd(struct bpf_map *map)
{
return map ? map->fd : -EINVAL;
@@ -1832,6 +1867,18 @@ int bpf_prog_load(const char *file, enum bpf_prog_type
type,
return -ENOENT;
}
+ /*
+ * If type is not specified, try to guess it based on
+ * section name.
+ */
+ if (type == BPF_PROG_TYPE_UNSPEC) {
+ type = bpf_program__guess_type(prog);
+ if (type == BPF_PROG_TYPE_UNSPEC) {
+ bpf_object__close(obj);
+ return -EINVAL;
+ }
+ }
+
bpf_program__set_type(prog, type);
err = bpf_object__load(obj);
if (err) {
--
2.14.3
