summaryrefslogtreecommitdiffstats
path: root/tools/lib/bpf
diff options
context:
space:
mode:
authorAndrii Nakryiko <andriin@fb.com>2020-07-21 23:46:00 -0700
committerAlexei Starovoitov <ast@kernel.org>2020-07-25 20:37:02 -0700
commitdc8698cac7aada9b61a612cb819341d84591163e (patch)
treed3be5774e01e3c0ec41e4d2653b0c06a99437744 /tools/lib/bpf
parentc1931c9784ebb5787c0784c112fb8baa5e8455b3 (diff)
downloadlinux-dc8698cac7aada9b61a612cb819341d84591163e.tar.gz
linux-dc8698cac7aada9b61a612cb819341d84591163e.tar.bz2
linux-dc8698cac7aada9b61a612cb819341d84591163e.zip
libbpf: Add support for BPF XDP link
Sync UAPI header and add support for using bpf_link-based XDP attachment. Make xdp/ prog type set expected attach type. Kernel didn't enforce attach_type for XDP programs before, so there is no backwards compatiblity issues there. Also fix section_names selftest to recognize that xdp prog types now have expected attach type. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200722064603.3350758-8-andriin@fb.com
Diffstat (limited to 'tools/lib/bpf')
-rw-r--r--tools/lib/bpf/libbpf.c9
-rw-r--r--tools/lib/bpf/libbpf.h2
-rw-r--r--tools/lib/bpf/libbpf.map1
3 files changed, 11 insertions, 1 deletions
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
index e51479d60285..54830d603fee 100644
--- a/tools/lib/bpf/libbpf.c
+++ b/tools/lib/bpf/libbpf.c
@@ -6915,7 +6915,8 @@ static const struct bpf_sec_def section_defs[] = {
BPF_XDP_DEVMAP),
BPF_EAPROG_SEC("xdp_cpumap/", BPF_PROG_TYPE_XDP,
BPF_XDP_CPUMAP),
- BPF_PROG_SEC("xdp", BPF_PROG_TYPE_XDP),
+ BPF_EAPROG_SEC("xdp", BPF_PROG_TYPE_XDP,
+ BPF_XDP),
BPF_PROG_SEC("perf_event", BPF_PROG_TYPE_PERF_EVENT),
BPF_PROG_SEC("lwt_in", BPF_PROG_TYPE_LWT_IN),
BPF_PROG_SEC("lwt_out", BPF_PROG_TYPE_LWT_OUT),
@@ -8281,6 +8282,12 @@ bpf_program__attach_netns(struct bpf_program *prog, int netns_fd)
return bpf_program__attach_fd(prog, netns_fd, "netns");
}
+struct bpf_link *bpf_program__attach_xdp(struct bpf_program *prog, int ifindex)
+{
+ /* target_fd/target_ifindex use the same field in LINK_CREATE */
+ return bpf_program__attach_fd(prog, ifindex, "xdp");
+}
+
struct bpf_link *
bpf_program__attach_iter(struct bpf_program *prog,
const struct bpf_iter_attach_opts *opts)
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
index c6813791fa7e..9924385462ab 100644
--- a/tools/lib/bpf/libbpf.h
+++ b/tools/lib/bpf/libbpf.h
@@ -257,6 +257,8 @@ LIBBPF_API struct bpf_link *
bpf_program__attach_cgroup(struct bpf_program *prog, int cgroup_fd);
LIBBPF_API struct bpf_link *
bpf_program__attach_netns(struct bpf_program *prog, int netns_fd);
+LIBBPF_API struct bpf_link *
+bpf_program__attach_xdp(struct bpf_program *prog, int ifindex);
struct bpf_map;
diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map
index 6f0856abe299..ca49a6a7e5b2 100644
--- a/tools/lib/bpf/libbpf.map
+++ b/tools/lib/bpf/libbpf.map
@@ -286,6 +286,7 @@ LIBBPF_0.1.0 {
bpf_map__set_value_size;
bpf_map__type;
bpf_map__value_size;
+ bpf_program__attach_xdp;
bpf_program__autoload;
bpf_program__is_sk_lookup;
bpf_program__set_autoload;