From: "Toke Høiland-Jørgensen" <toke@redhat•com>
To: David Ahern <dsahern@kernel•org>, netdev@vger•kernel.org
Cc: davem@davemloft•net, kuba@kernel•org,
prashantbhole.linux@gmail•com, jasowang@redhat•com,
brouer@redhat•com, toshiaki.makita1@gmail•com,
daniel@iogearbox•net, john.fastabend@gmail•com, ast@kernel•org,
kafai@fb•com, songliubraving@fb•com, yhs@fb•com, andriin@fb•com,
dsahern@gmail•com, David Ahern <dahern@digitalocean•com>
Subject: Re: [PATCH bpf-next 12/16] libbpf: Add egress XDP support
Date: Tue, 21 Apr 2020 12:20:16 +0200 [thread overview]
Message-ID: <87a7359m3j.fsf@toke.dk> (raw)
In-Reply-To: <20200420200055.49033-13-dsahern@kernel.org>
David Ahern <dsahern@kernel•org> writes:
> From: David Ahern <dahern@digitalocean•com>
>
> Patch adds egress XDP support in libbpf.
>
> New section name hint, xdp_egress, is added to set expected attach
> type at program load. Programs can use xdp_egress as the prefix in
> the SEC statement to load the program with the BPF_XDP_EGRESS
> attach type set.
>
> egress is added to bpf_xdp_set_link_opts to specify egress type for
> use with bpf_set_link_xdp_fd_opts. Update library side to check
> for flag and set nla_type to IFLA_XDP_EGRESS.
>
> Add egress version of bpf_get_link_xdp* info and id apis with core
> code refactored to handle both rx and tx paths.
>
> Signed-off-by: Prashant Bhole <prashantbhole.linux@gmail•com>
> Co-developed-by: David Ahern <dahern@digitalocean•com>
> Signed-off-by: David Ahern <dahern@digitalocean•com>
> ---
> tools/lib/bpf/libbpf.c | 2 ++
> tools/lib/bpf/libbpf.h | 9 +++++-
> tools/lib/bpf/libbpf.map | 2 ++
> tools/lib/bpf/netlink.c | 63 +++++++++++++++++++++++++++++++++++-----
> 4 files changed, 67 insertions(+), 9 deletions(-)
>
> diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c
> index 8f480e29a6b0..32fc970495d9 100644
> --- a/tools/lib/bpf/libbpf.c
> +++ b/tools/lib/bpf/libbpf.c
> @@ -6366,6 +6366,8 @@ static const struct bpf_sec_def section_defs[] = {
> .is_attach_btf = true,
> .expected_attach_type = BPF_LSM_MAC,
> .attach_fn = attach_lsm),
> + BPF_EAPROG_SEC("xdp_egress", BPF_PROG_TYPE_XDP,
> + BPF_XDP_EGRESS),
> BPF_PROG_SEC("xdp", BPF_PROG_TYPE_XDP),
> BPF_PROG_SEC("perf_event", BPF_PROG_TYPE_PERF_EVENT),
> BPF_PROG_SEC("lwt_in", BPF_PROG_TYPE_LWT_IN),
> diff --git a/tools/lib/bpf/libbpf.h b/tools/lib/bpf/libbpf.h
> index f1dacecb1619..3feb1242f78e 100644
> --- a/tools/lib/bpf/libbpf.h
> +++ b/tools/lib/bpf/libbpf.h
> @@ -453,14 +453,16 @@ struct xdp_link_info {
> __u32 drv_prog_id;
> __u32 hw_prog_id;
> __u32 skb_prog_id;
> + __u32 egress_core_prog_id;
> __u8 attach_mode;
> };
>
> struct bpf_xdp_set_link_opts {
> size_t sz;
> int old_fd;
> + __u8 egress;
> };
> -#define bpf_xdp_set_link_opts__last_field old_fd
> +#define bpf_xdp_set_link_opts__last_field egress
>
> LIBBPF_API int bpf_set_link_xdp_fd(int ifindex, int fd, __u32 flags);
> LIBBPF_API int bpf_set_link_xdp_fd_opts(int ifindex, int fd, __u32 flags,
> @@ -468,6 +470,11 @@ LIBBPF_API int bpf_set_link_xdp_fd_opts(int ifindex, int fd, __u32 flags,
> LIBBPF_API int bpf_get_link_xdp_id(int ifindex, __u32 *prog_id, __u32 flags);
> LIBBPF_API int bpf_get_link_xdp_info(int ifindex, struct xdp_link_info *info,
> size_t info_size, __u32 flags);
> +LIBBPF_API int bpf_get_link_xdp_egress_id(int ifindex, __u32 *prog_id,
> + __u32 flags);
> +LIBBPF_API int bpf_get_link_xdp_egress_info(int ifindex,
> + struct xdp_link_info *info,
> + size_t info_size, __u32 flags);
Isn't the kernel returning both program types in the same message when
dumping an interface? So do we really need a separate getter instead of
just populating xdp_link_info with the egress ID in the existing getter?
-Toke
next prev parent reply other threads:[~2020-04-21 10:20 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-20 20:00 [PATCH bpf-next 00/16] net: Add support for XDP in egress path David Ahern
2020-04-20 20:00 ` [PATCH bpf-next 01/16] net: Refactor convert_to_xdp_frame David Ahern
2020-04-20 20:00 ` [PATCH bpf-next 02/16] net: Move handling of IFLA_XDP attribute out of do_setlink David Ahern
2020-04-20 20:00 ` [PATCH bpf-next 03/16] net: Add XDP setup and query commands for Tx programs David Ahern
2020-04-20 20:00 ` [PATCH bpf-next 04/16] net: Add BPF_XDP_EGRESS as a bpf_attach_type David Ahern
2020-04-21 10:14 ` Toke Høiland-Jørgensen
2020-04-21 12:50 ` David Ahern
2020-04-21 13:25 ` Toke Høiland-Jørgensen
2020-04-21 13:49 ` David Ahern
2020-04-22 11:21 ` Toke Høiland-Jørgensen
2020-04-22 14:51 ` David Ahern
2020-04-22 15:27 ` Toke Høiland-Jørgensen
2020-04-22 15:33 ` David Ahern
2020-04-22 15:51 ` Toke Høiland-Jørgensen
2020-04-22 15:56 ` David Ahern
2020-04-23 15:23 ` Toke Høiland-Jørgensen
2020-04-23 0:39 ` Alexei Starovoitov
2020-04-23 16:40 ` Toke Høiland-Jørgensen
2020-04-23 16:52 ` Alexei Starovoitov
2020-04-23 17:05 ` Toke Høiland-Jørgensen
2020-04-23 22:44 ` Alexei Starovoitov
2020-04-23 23:49 ` Toke Høiland-Jørgensen
2020-04-24 0:53 ` Alexei Starovoitov
2020-04-24 0:58 ` David Ahern
2020-04-24 8:55 ` Toke Høiland-Jørgensen
2020-04-20 20:00 ` [PATCH bpf-next 05/16] xdp: Add xdp_txq_info to xdp_buff David Ahern
2020-04-20 20:00 ` [PATCH bpf-next 06/16] net: Add IFLA_XDP_EGRESS for XDP programs in the egress path David Ahern
2020-04-21 10:17 ` Toke Høiland-Jørgensen
2020-04-21 12:59 ` David Ahern
2020-04-21 13:27 ` Toke Høiland-Jørgensen
2020-04-20 20:00 ` [PATCH bpf-next 07/16] net: Rename do_xdp_generic to do_xdp_generic_rx David Ahern
2020-04-20 20:00 ` [PATCH bpf-next 08/16] net: rename netif_receive_generic_xdp to do_generic_xdp_core David Ahern
2020-04-20 20:00 ` [PATCH bpf-next 09/16] net: set XDP egress program on netdevice David Ahern
2020-04-20 20:00 ` [PATCH bpf-next 10/16] net: Support xdp in the Tx path for packets as an skb David Ahern
2020-04-20 20:00 ` [PATCH bpf-next 11/16] net: Support xdp in the Tx path for xdp_frames David Ahern
2020-04-20 20:00 ` [PATCH bpf-next 12/16] libbpf: Add egress XDP support David Ahern
2020-04-21 10:20 ` Toke Høiland-Jørgensen [this message]
2020-04-21 13:03 ` David Ahern
2020-04-21 13:28 ` Toke Høiland-Jørgensen
2020-04-23 1:19 ` Andrii Nakryiko
2020-04-23 1:33 ` David Ahern
2020-04-20 20:00 ` [PATCH bpf-next 13/16] bpftool: Add support for XDP egress David Ahern
2020-04-23 10:43 ` Quentin Monnet
2020-04-23 18:50 ` David Ahern
2020-04-20 20:00 ` [PATCH bpf-next 14/16] selftest: Add test for xdp_egress David Ahern
2020-04-20 20:00 ` [PATCH bpf-next 15/16] selftest: Add xdp_egress attach tests David Ahern
2020-04-20 20:00 ` [PATCH bpf-next 16/16] samples/bpf: add XDP egress support to xdp1 David Ahern
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