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libbpf: Add bpf_link support for BPF_PROG_TYPE_SOCKMAP

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Introduce a libbpf API function bpf_program__attach_sockmap()
which allow user to get a bpf_link for their corresponding programs.

Acked-by: Andrii Nakryiko <andrii@kernel.org>
Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Reviewed-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20240410043532.3737722-1-yonghong.song@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Yonghong Song 2024-04-09 21:35:32 -07:00 committed by Alexei Starovoitov
parent 699c23f02c
commit 849989af61
3 changed files with 10 additions and 0 deletions
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7
tools/lib/bpf/libbpf.c
View file

@ -149,6 +149,7 @@ static const char * const link_type_name[] = {
[BPF_LINK_TYPE_TCX] = "tcx",
[BPF_LINK_TYPE_UPROBE_MULTI] = "uprobe_multi",
[BPF_LINK_TYPE_NETKIT] = "netkit",
[BPF_LINK_TYPE_SOCKMAP] = "sockmap",
};
static const char * const map_type_name[] = {
@ -12533,6 +12534,12 @@ bpf_program__attach_netns(const struct bpf_program *prog, int netns_fd)
return bpf_program_attach_fd(prog, netns_fd, "netns", NULL);
}
struct bpf_link *
bpf_program__attach_sockmap(const struct bpf_program *prog, int map_fd)
{
return bpf_program_attach_fd(prog, map_fd, "sockmap", NULL);
}
struct bpf_link *bpf_program__attach_xdp(const struct bpf_program *prog, int ifindex)
{
/* target_fd/target_ifindex use the same field in LINK_CREATE */

2
tools/lib/bpf/libbpf.h
View file

@ -795,6 +795,8 @@ bpf_program__attach_cgroup(const struct bpf_program *prog, int cgroup_fd);
LIBBPF_API struct bpf_link *
bpf_program__attach_netns(const struct bpf_program *prog, int netns_fd);
LIBBPF_API struct bpf_link *
bpf_program__attach_sockmap(const struct bpf_program *prog, int map_fd);
LIBBPF_API struct bpf_link *
bpf_program__attach_xdp(const struct bpf_program *prog, int ifindex);
LIBBPF_API struct bpf_link *
bpf_program__attach_freplace(const struct bpf_program *prog,

1
tools/lib/bpf/libbpf.map
View file

@ -419,6 +419,7 @@ LIBBPF_1.4.0 {
LIBBPF_1.5.0 {
global:
bpf_program__attach_sockmap;
ring__consume_n;
ring_buffer__consume_n;
} LIBBPF_1.4.0;