diff options
author | Florian Westphal <fw@strlen.de> | 2023-06-28 17:27:37 +0200 |
---|---|---|
committer | Andrii Nakryiko <andrii@kernel.org> | 2023-06-30 12:34:31 -0700 |
commit | 52364abb10b57074bf724ee2032e688180ed8bde (patch) | |
tree | b5195ccee7af2a30f1d348dcaa4d5d1b8cf62002 /tools/lib/bpf/libbpf.h | |
parent | 2d2c95162de8fc6875c9c3d39f83527ae28e2e8a (diff) |
libbpf: Add netfilter link attach helper
Add new api function: bpf_program__attach_netfilter.
It takes a bpf program (netfilter type), and a pointer to a option struct
that contains the desired attachment (protocol family, priority, hook
location, ...).
It returns a pointer to a 'bpf_link' structure or NULL on error.
Next patch adds new netfilter_basic test that uses this function to
attach a program to a few pf/hook/priority combinations.
v2: change name and use bpf_link_create.
Suggested-by: Andrii Nakryiko <andrii.nakryiko@gmail.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
Acked-by: Daniel Xu <dxu@dxuuu.xyz>
Link: https://lore.kernel.org/bpf/CAEf4BzZrmUv27AJp0dDxBDMY_B8e55-wLs8DUKK69vCWsCG_pQ@mail.gmail.com/
Link: https://lore.kernel.org/bpf/CAEf4BzZ69YgrQW7DHCJUT_X+GqMq_ZQQPBwopaJJVGFD5=d5Vg@mail.gmail.com/
Link: https://lore.kernel.org/bpf/20230628152738.22765-2-fw@strlen.de
Diffstat (limited to 'tools/lib/bpf/libbpf.h')
-rw-r--r-- | tools/lib/bpf/libbpf.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h index 754da73c643b..10642ad69d76 100644 --- a/tools/lib/bpf/libbpf.h +++ b/tools/lib/bpf/libbpf.h @@ -718,6 +718,21 @@ LIBBPF_API struct bpf_link * bpf_program__attach_freplace(const struct bpf_program *prog, int target_fd, const char *attach_func_name); +struct bpf_netfilter_opts { + /* size of this struct, for forward/backward compatibility */ + size_t sz; + + __u32 pf; + __u32 hooknum; + __s32 priority; + __u32 flags; +}; +#define bpf_netfilter_opts__last_field flags + +LIBBPF_API struct bpf_link * +bpf_program__attach_netfilter(const struct bpf_program *prog, + const struct bpf_netfilter_opts *opts); + struct bpf_map; LIBBPF_API struct bpf_link *bpf_map__attach_struct_ops(const struct bpf_map *map); |