From: David Ahern <dsahern@kernel.org>
To: netdev@vger.kernel.org
Cc: prashantbhole.linux@gmail.com, jasowang@redhat.com,
davem@davemloft.net, jakub.kicinski@netronome.com,
jbrouer@redhat.com, toke@redhat.com, mst@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: [PATCH bpf-next 02/12] net: Add BPF_XDP_EGRESS as a bpf_attach_type
Date: Wed, 22 Jan 2020 18:42:00 -0700 [thread overview]
Message-ID: <20200123014210.38412-3-dsahern@kernel.org> (raw)
In-Reply-To: <20200123014210.38412-1-dsahern@kernel.org>
From: Prashant Bhole <prashantbhole.linux@gmail.com>
Add new bpf_attach_type, BPF_XDP_EGRESS, for BPF programs attached
at the XDP layer, but the egress path.
Since egress path does not have rx_queue_index and ingress_ifindex set,
update xdp_is_valid_access to block access to these entries in the xdp
context when a program is attached to egress path.
Signed-off-by: Prashant Bhole <prashantbhole.linux@gmail.com>
Signed-off-by: David Ahern <dahern@digitalocean.com>
---
include/uapi/linux/bpf.h | 1 +
net/core/filter.c | 8 ++++++++
tools/include/uapi/linux/bpf.h | 1 +
3 files changed, 10 insertions(+)
diff --git a/include/uapi/linux/bpf.h b/include/uapi/linux/bpf.h
index 033d90a2282d..72f2a9a4621e 100644
--- a/include/uapi/linux/bpf.h
+++ b/include/uapi/linux/bpf.h
@@ -209,6 +209,7 @@ enum bpf_attach_type {
BPF_TRACE_RAW_TP,
BPF_TRACE_FENTRY,
BPF_TRACE_FEXIT,
+ BPF_XDP_EGRESS,
__MAX_BPF_ATTACH_TYPE
};
diff --git a/net/core/filter.c b/net/core/filter.c
index 17de6747d9e3..a903f3a15d74 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -6803,6 +6803,14 @@ static bool xdp_is_valid_access(int off, int size,
return false;
}
+ if (prog->expected_attach_type == BPF_XDP_EGRESS) {
+ switch (off) {
+ case offsetof(struct xdp_md, rx_queue_index):
+ case offsetof(struct xdp_md, ingress_ifindex):
+ return false;
+ }
+ }
+
switch (off) {
case offsetof(struct xdp_md, data):
info->reg_type = PTR_TO_PACKET;
diff --git a/tools/include/uapi/linux/bpf.h b/tools/include/uapi/linux/bpf.h
index 033d90a2282d..72f2a9a4621e 100644
--- a/tools/include/uapi/linux/bpf.h
+++ b/tools/include/uapi/linux/bpf.h
@@ -209,6 +209,7 @@ enum bpf_attach_type {
BPF_TRACE_RAW_TP,
BPF_TRACE_FENTRY,
BPF_TRACE_FEXIT,
+ BPF_XDP_EGRESS,
__MAX_BPF_ATTACH_TYPE
};
--
2.21.1 (Apple Git-122.3)
next prev parent reply other threads:[~2020-01-23 1:42 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-23 1:41 [PATCH bpf-next 00/12] Add support for XDP in egress path David Ahern
2020-01-23 1:41 ` [PATCH bpf-next 01/12] net: Add new XDP setup and query commands David Ahern
2020-01-23 1:42 ` David Ahern [this message]
2020-01-23 11:34 ` [PATCH bpf-next 02/12] net: Add BPF_XDP_EGRESS as a bpf_attach_type Toke Høiland-Jørgensen
2020-01-23 21:32 ` David Ahern
2020-01-24 9:49 ` Toke Høiland-Jørgensen
2020-01-24 7:33 ` Martin Lau
2020-01-23 1:42 ` [PATCH bpf-next 03/12] net: Add IFLA_XDP_EGRESS for XDP programs in the egress path David Ahern
2020-01-23 11:35 ` Toke Høiland-Jørgensen
2020-01-23 21:33 ` David Ahern
2020-01-24 15:21 ` Jakub Kicinski
2020-01-24 15:36 ` Toke Høiland-Jørgensen
2020-01-26 1:43 ` David Ahern
2020-01-26 4:54 ` Alexei Starovoitov
2020-02-02 17:59 ` David Ahern
2020-01-26 12:49 ` Jesper Dangaard Brouer
2020-01-26 16:38 ` David Ahern
2020-01-26 22:17 ` Jakub Kicinski
2020-01-28 14:13 ` Jesper Dangaard Brouer
2020-01-30 14:45 ` Jakub Kicinski
2020-02-01 16:03 ` Toke Høiland-Jørgensen
2020-02-02 17:48 ` David Ahern
2020-01-26 22:11 ` Jakub Kicinski
2020-01-27 4:03 ` David Ahern
2020-01-27 14:16 ` Jakub Kicinski
2020-01-28 3:43 ` David Ahern
2020-01-28 13:57 ` Jakub Kicinski
2020-02-01 16:24 ` Toke Høiland-Jørgensen
2020-02-01 17:08 ` Jakub Kicinski
2020-02-01 20:05 ` Toke Høiland-Jørgensen
2020-02-02 4:15 ` Jakub Kicinski
2020-02-03 19:56 ` Toke Høiland-Jørgensen
2020-02-03 20:13 ` Toke Høiland-Jørgensen
2020-02-03 22:15 ` Jesper Dangaard Brouer
2020-02-04 11:00 ` Toke Høiland-Jørgensen
2020-02-04 17:09 ` Jakub Kicinski
2020-02-05 15:30 ` Toke Høiland-Jørgensen
2020-02-02 17:45 ` David Ahern
2020-02-02 19:12 ` Jakub Kicinski
2020-02-02 17:43 ` David Ahern
2020-02-02 19:31 ` Jakub Kicinski
2020-02-02 21:51 ` David Ahern
2020-02-01 15:59 ` Toke Høiland-Jørgensen
2020-02-02 17:54 ` David Ahern
2020-02-03 20:09 ` Toke Høiland-Jørgensen
2020-01-23 1:42 ` [PATCH bpf-next 04/12] net: core: rename netif_receive_generic_xdp() to do_generic_xdp_core() David Ahern
2020-01-23 1:42 ` [PATCH bpf-next 05/12] tuntap: check tun_msg_ctl type at necessary places David Ahern
2020-01-23 1:42 ` [PATCH bpf-next 06/12] tun: move shared functions to if_tun.h David Ahern
2020-01-23 1:42 ` [PATCH bpf-next 07/12] vhost_net: user tap recvmsg api to access ptr ring David Ahern
2020-01-23 8:26 ` Michael S. Tsirkin
2020-01-23 1:42 ` [PATCH bpf-next 08/12] tuntap: remove usage of ptr ring in vhost_net David Ahern
2020-01-23 1:42 ` [PATCH bpf-next 09/12] tun: set egress XDP program David Ahern
2020-01-23 1:42 ` [PATCH bpf-next 10/12] tun: run XDP program in tx path David Ahern
2020-01-23 8:23 ` Michael S. Tsirkin
2020-01-24 13:36 ` Prashant Bhole
2020-01-24 13:44 ` Prashant Bhole
2020-01-23 1:42 ` [PATCH bpf-next 11/12] libbpf: Add egress XDP support David Ahern
2020-01-23 1:42 ` [PATCH bpf-next 12/12] samples/bpf: xdp1, add " David Ahern
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200123014210.38412-3-dsahern@kernel.org \
--to=dsahern@kernel.org \
--cc=andriin@fb.com \
--cc=ast@kernel.org \
--cc=dahern@digitalocean.com \
--cc=daniel@iogearbox.net \
--cc=davem@davemloft.net \
--cc=dsahern@gmail.com \
--cc=jakub.kicinski@netronome.com \
--cc=jasowang@redhat.com \
--cc=jbrouer@redhat.com \
--cc=john.fastabend@gmail.com \
--cc=kafai@fb.com \
--cc=mst@redhat.com \
--cc=netdev@vger.kernel.org \
--cc=prashantbhole.linux@gmail.com \
--cc=songliubraving@fb.com \
--cc=toke@redhat.com \
--cc=toshiaki.makita1@gmail.com \
--cc=yhs@fb.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).