From: Sridhar Samudrala <sridhar.samudrala@intel.com>
To: magnus.karlsson@intel.com, bjorn.topel@intel.com,
netdev@vger.kernel.org, bpf@vger.kernel.org,
sridhar.samudrala@intel.com, intel-wired-lan@lists.osuosl.org,
maciej.fijalkowski@intel.com, tom.herbert@intel.com
Subject: [PATCH bpf-next 3/4] libbpf: handle AF_XDP sockets created with XDP_DIRECT bind flag.
Date: Mon, 7 Oct 2019 23:16:54 -0700 [thread overview]
Message-ID: <1570515415-45593-4-git-send-email-sridhar.samudrala@intel.com> (raw)
In-Reply-To: <1570515415-45593-1-git-send-email-sridhar.samudrala@intel.com>
Don't allow an AF_XDP socket trying to bind with XDP_DIRECT bind
flag when a normal XDP program is already attached to the device,
Don't attach the default XDP program when AF_XDP socket is created
with XDP_DIRECT bind flag.
Signed-off-by: Sridhar Samudrala <sridhar.samudrala@intel.com>
---
tools/lib/bpf/xsk.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/tools/lib/bpf/xsk.c b/tools/lib/bpf/xsk.c
index d5f4900e5c54..953b479040cd 100644
--- a/tools/lib/bpf/xsk.c
+++ b/tools/lib/bpf/xsk.c
@@ -454,6 +454,9 @@ static int xsk_setup_xdp_prog(struct xsk_socket *xsk)
return err;
if (!prog_id) {
+ if (xsk->config.bind_flags & XDP_DIRECT)
+ return 0;
+
err = xsk_create_bpf_maps(xsk);
if (err)
return err;
@@ -464,6 +467,9 @@ static int xsk_setup_xdp_prog(struct xsk_socket *xsk)
return err;
}
} else {
+ if (xsk->config.bind_flags & XDP_DIRECT)
+ return -EEXIST;
+
xsk->prog_fd = bpf_prog_get_fd_by_id(prog_id);
err = xsk_lookup_bpf_maps(xsk);
if (err) {
--
2.14.5
next prev parent reply other threads:[~2019-10-08 6:16 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-08 6:16 [PATCH bpf-next 0/4] Enable direct receive on AF_XDP sockets Sridhar Samudrala
2019-10-08 6:16 ` [PATCH bpf-next 1/4] bpf: introduce bpf_get_prog_id and bpf_set_prog_id helper functions Sridhar Samudrala
2019-10-08 6:16 ` [PATCH bpf-next 2/4] xsk: allow AF_XDP sockets to receive packets directly from a queue Sridhar Samudrala
2019-10-08 6:58 ` Toke Høiland-Jørgensen
2019-10-08 8:47 ` Björn Töpel
2019-10-08 8:48 ` Björn Töpel
2019-10-08 9:04 ` Toke Høiland-Jørgensen
2019-10-08 8:05 ` Björn Töpel
2019-10-09 16:32 ` Samudrala, Sridhar
2019-10-09 1:20 ` Alexei Starovoitov
[not found] ` <3ED8E928C4210A4289A677D2FEB48235140134CE@fmsmsx111.amr.corp.intel.com>
2019-10-09 16:53 ` FW: " Samudrala, Sridhar
2019-10-09 17:17 ` Alexei Starovoitov
2019-10-09 19:12 ` Samudrala, Sridhar
2019-10-10 1:06 ` Alexei Starovoitov
2019-10-18 18:40 ` Samudrala, Sridhar
2019-10-18 19:22 ` Toke Høiland-Jørgensen
2019-10-19 0:14 ` Alexei Starovoitov
2019-10-19 0:45 ` Samudrala, Sridhar
2019-10-19 2:25 ` Alexei Starovoitov
2019-10-20 10:14 ` Toke Høiland-Jørgensen
2019-10-20 17:12 ` [Intel-wired-lan] " Björn Töpel
2019-10-21 20:10 ` Samudrala, Sridhar
2019-10-21 22:34 ` Alexei Starovoitov
2019-10-22 19:06 ` Samudrala, Sridhar
2019-10-23 17:42 ` Alexei Starovoitov
2019-10-24 18:12 ` Samudrala, Sridhar
2019-10-25 7:42 ` Björn Töpel
2019-10-31 22:38 ` Samudrala, Sridhar
2019-10-31 23:15 ` Alexei Starovoitov
2019-11-01 0:21 ` Jakub Kicinski
2019-11-01 18:31 ` Samudrala, Sridhar
2019-11-04 2:08 ` dan
2019-10-25 9:07 ` Björn Töpel
2019-10-08 6:16 ` Sridhar Samudrala [this message]
2019-10-08 8:05 ` [PATCH bpf-next 3/4] libbpf: handle AF_XDP sockets created with XDP_DIRECT bind flag Björn Töpel
2019-10-08 6:16 ` [PATCH bpf-next 4/4] xdpsock: add an option to create AF_XDP sockets in XDP_DIRECT mode Sridhar Samudrala
2019-10-08 8:05 ` Björn Töpel
2019-10-08 8:05 ` [PATCH bpf-next 0/4] Enable direct receive on AF_XDP sockets Björn Töpel
2019-10-09 16:19 ` Samudrala, Sridhar
2019-10-09 0:49 ` Jakub Kicinski
2019-10-09 6:29 ` Samudrala, Sridhar
2019-10-09 16:53 ` Jakub Kicinski
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