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From: Jakub Kicinski <jakub.kicinski@netronome.com>
To: alexei.starovoitov@gmail.com, daniel@iogearbox.net
Cc: oss-drivers@netronome.com, netdev@vger.kernel.org,
	Jakub Kicinski <jakub.kicinski@netronome.com>
Subject: [PATCH bpf-next 1/7] xdp: add per mode attributes for attached programs
Date: Wed, 11 Jul 2018 20:36:38 -0700	[thread overview]
Message-ID: <20180712033644.23954-2-jakub.kicinski@netronome.com> (raw)
In-Reply-To: <20180712033644.23954-1-jakub.kicinski@netronome.com>

In preparation for support of simultaneous driver and hardware XDP
support add per-mode attributes.  The catch-all IFLA_XDP_PROG_ID
will still be reported, but user space can now also access the
program ID in a new IFLA_XDP_<mode>_PROG_ID attribute.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
---
 include/uapi/linux/if_link.h |  3 +++
 net/core/rtnetlink.c         | 30 ++++++++++++++++++++++++++----
 2 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index cf01b6824244..bc86c2b105ec 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -928,6 +928,9 @@ enum {
 	IFLA_XDP_ATTACHED,
 	IFLA_XDP_FLAGS,
 	IFLA_XDP_PROG_ID,
+	IFLA_XDP_DRV_PROG_ID,
+	IFLA_XDP_SKB_PROG_ID,
+	IFLA_XDP_HW_PROG_ID,
 	__IFLA_XDP_MAX,
 };
 
diff --git a/net/core/rtnetlink.c b/net/core/rtnetlink.c
index e3f743c141b3..8ab95de1114c 100644
--- a/net/core/rtnetlink.c
+++ b/net/core/rtnetlink.c
@@ -964,7 +964,8 @@ static size_t rtnl_xdp_size(void)
 {
 	size_t xdp_size = nla_total_size(0) +	/* nest IFLA_XDP */
 			  nla_total_size(1) +	/* XDP_ATTACHED */
-			  nla_total_size(4);	/* XDP_PROG_ID */
+			  nla_total_size(4) +	/* XDP_PROG_ID */
+			  nla_total_size(4);	/* XDP_<mode>_PROG_ID */
 
 	return xdp_size;
 }
@@ -1378,16 +1379,17 @@ static u8 rtnl_xdp_attached_mode(struct net_device *dev, u32 *prog_id)
 
 static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
 {
+	u32 prog_attr, prog_id;
 	struct nlattr *xdp;
-	u32 prog_id;
 	int err;
+	u8 mode;
 
 	xdp = nla_nest_start(skb, IFLA_XDP);
 	if (!xdp)
 		return -EMSGSIZE;
 
-	err = nla_put_u8(skb, IFLA_XDP_ATTACHED,
-			 rtnl_xdp_attached_mode(dev, &prog_id));
+	mode = rtnl_xdp_attached_mode(dev, &prog_id);
+	err = nla_put_u8(skb, IFLA_XDP_ATTACHED, mode);
 	if (err)
 		goto err_cancel;
 
@@ -1395,6 +1397,26 @@ static int rtnl_xdp_fill(struct sk_buff *skb, struct net_device *dev)
 		err = nla_put_u32(skb, IFLA_XDP_PROG_ID, prog_id);
 		if (err)
 			goto err_cancel;
+
+		switch (mode) {
+		case XDP_ATTACHED_DRV:
+			prog_attr = IFLA_XDP_DRV_PROG_ID;
+			break;
+		case XDP_ATTACHED_SKB:
+			prog_attr = IFLA_XDP_SKB_PROG_ID;
+			break;
+		case XDP_ATTACHED_HW:
+			prog_attr = IFLA_XDP_HW_PROG_ID;
+			break;
+		case XDP_ATTACHED_NONE:
+		default:
+			err = -EINVAL;
+			goto err_cancel;
+		}
+
+		err = nla_put_u32(skb, prog_attr, prog_id);
+		if (err)
+			goto err_cancel;
 	}
 
 	nla_nest_end(skb, xdp);
-- 
2.17.1

  reply	other threads:[~2018-07-12  3:44 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-07-12  3:36 [PATCH bpf-next 0/7] xdp: simultaneous driver and HW XDP Jakub Kicinski
2018-07-12  3:36 ` Jakub Kicinski [this message]
2018-07-12  3:36 ` [PATCH bpf-next 2/7] xdp: don't make drivers report attachment mode Jakub Kicinski
2018-07-12  3:36 ` [PATCH bpf-next 3/7] xdp: factor out common program/flags handling from drivers Jakub Kicinski
2018-07-12  3:36 ` [PATCH bpf-next 4/7] xdp: support simultaneous driver and hw XDP attachment Jakub Kicinski
2018-07-12  3:36 ` [PATCH bpf-next 5/7] netdevsim: add support for simultaneous driver and hw XDP Jakub Kicinski
2018-07-12  3:36 ` [PATCH bpf-next 6/7] selftests/bpf: add test for multiple programs Jakub Kicinski
2018-07-12  3:36 ` [PATCH bpf-next 7/7] nfp: add support for simultaneous driver and hw XDP Jakub Kicinski
2018-07-13 18:08 ` [PATCH bpf-next 0/7] xdp: simultaneous driver and HW XDP Alexei Starovoitov
2018-07-13 19:59 ` Daniel Borkmann
2018-07-13 20:39   ` Jakub Kicinski

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