| Message ID | 20220304172852.274126-5-benjamin.tissoires@redhat.com |
|---|---|
| State | New |
| Headers | show |
| Series | Introduce eBPF support for HID devices | expand |
On Fri, Mar 4, 2022 at 9:31 AM Benjamin Tissoires <benjamin.tissoires@redhat.com> wrote: > > HID-bpf program type are needing a new SEC. > To bind a hid-bpf program, we can rely on bpf_program__attach_fd() > so export a new function to the API. > > Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> > > --- > > changes in v2: > - split the series by bpf/libbpf/hid/selftests and samples > --- > tools/lib/bpf/libbpf.c | 7 +++++++ > tools/lib/bpf/libbpf.h | 2 ++ > tools/lib/bpf/libbpf.map | 1 + > 3 files changed, 10 insertions(+) > > diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c > index 81bf01d67671..356bbd3ad2c7 100644 > --- a/tools/lib/bpf/libbpf.c > +++ b/tools/lib/bpf/libbpf.c > @@ -8680,6 +8680,7 @@ static const struct bpf_sec_def section_defs[] = { > SEC_DEF("cgroup/setsockopt", CGROUP_SOCKOPT, BPF_CGROUP_SETSOCKOPT, SEC_ATTACHABLE | SEC_SLOPPY_PFX), > SEC_DEF("struct_ops+", STRUCT_OPS, 0, SEC_NONE), > SEC_DEF("sk_lookup", SK_LOOKUP, BPF_SK_LOOKUP, SEC_ATTACHABLE | SEC_SLOPPY_PFX), > + SEC_DEF("hid/device_event", HID, BPF_HID_DEVICE_EVENT, SEC_ATTACHABLE_OPT | SEC_SLOPPY_PFX), no SEC_SLOPPY_PFX for any new program type, please > }; > > #define MAX_TYPE_NAME_SIZE 32 > @@ -10659,6 +10660,12 @@ static struct bpf_link *attach_iter(const struct bpf_program *prog, long cookie) > return bpf_program__attach_iter(prog, NULL); > } > > +struct bpf_link * > +bpf_program__attach_hid(const struct bpf_program *prog, int hid_fd) > +{ > + return bpf_program__attach_fd(prog, hid_fd, 0, "hid"); > +} > + > struct bpf_link *bpf_program__attach(const struct bpf_program *prog) > { > if (!prog->sec_def || !prog->sec_def->attach_fn) > diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h > index c8d8daad212e..f677ac0a9ede 100644 > --- a/tools/lib/bpf/libbpf.h > +++ b/tools/lib/bpf/libbpf.h > @@ -529,6 +529,8 @@ struct bpf_iter_attach_opts { > LIBBPF_API struct bpf_link * > bpf_program__attach_iter(const struct bpf_program *prog, > const struct bpf_iter_attach_opts *opts); > +LIBBPF_API struct bpf_link * > +bpf_program__attach_hid(const struct bpf_program *prog, int hid_fd); > > /* > * Libbpf allows callers to adjust BPF programs before being loaded > diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map > index 47e70c9058d9..fdc6fa743953 100644 > --- a/tools/lib/bpf/libbpf.map > +++ b/tools/lib/bpf/libbpf.map > @@ -424,6 +424,7 @@ LIBBPF_0.6.0 { > LIBBPF_0.7.0 { > global: > bpf_btf_load; > + bpf_program__attach_hid; should go into 0.8.0 > bpf_program__expected_attach_type; > bpf_program__log_buf; > bpf_program__log_level; > -- > 2.35.1 >
diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 81bf01d67671..356bbd3ad2c7 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -8680,6 +8680,7 @@ static const struct bpf_sec_def section_defs[] = { SEC_DEF("cgroup/setsockopt", CGROUP_SOCKOPT, BPF_CGROUP_SETSOCKOPT, SEC_ATTACHABLE | SEC_SLOPPY_PFX), SEC_DEF("struct_ops+", STRUCT_OPS, 0, SEC_NONE), SEC_DEF("sk_lookup", SK_LOOKUP, BPF_SK_LOOKUP, SEC_ATTACHABLE | SEC_SLOPPY_PFX), + SEC_DEF("hid/device_event", HID, BPF_HID_DEVICE_EVENT, SEC_ATTACHABLE_OPT | SEC_SLOPPY_PFX), }; #define MAX_TYPE_NAME_SIZE 32 @@ -10659,6 +10660,12 @@ static struct bpf_link *attach_iter(const struct bpf_program *prog, long cookie) return bpf_program__attach_iter(prog, NULL); } +struct bpf_link * +bpf_program__attach_hid(const struct bpf_program *prog, int hid_fd) +{ + return bpf_program__attach_fd(prog, hid_fd, 0, "hid"); +} + struct bpf_link *bpf_program__attach(const struct bpf_program *prog) { if (!prog->sec_def || !prog->sec_def->attach_fn) diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index c8d8daad212e..f677ac0a9ede 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -529,6 +529,8 @@ struct bpf_iter_attach_opts { LIBBPF_API struct bpf_link * bpf_program__attach_iter(const struct bpf_program *prog, const struct bpf_iter_attach_opts *opts); +LIBBPF_API struct bpf_link * +bpf_program__attach_hid(const struct bpf_program *prog, int hid_fd); /* * Libbpf allows callers to adjust BPF programs before being loaded diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 47e70c9058d9..fdc6fa743953 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -424,6 +424,7 @@ LIBBPF_0.6.0 { LIBBPF_0.7.0 { global: bpf_btf_load; + bpf_program__attach_hid; bpf_program__expected_attach_type; bpf_program__log_buf; bpf_program__log_level;
HID-bpf program type are needing a new SEC. To bind a hid-bpf program, we can rely on bpf_program__attach_fd() so export a new function to the API. Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com> --- changes in v2: - split the series by bpf/libbpf/hid/selftests and samples --- tools/lib/bpf/libbpf.c | 7 +++++++ tools/lib/bpf/libbpf.h | 2 ++ tools/lib/bpf/libbpf.map | 1 + 3 files changed, 10 insertions(+)