LKML Archive on lore.kernel.org
 help / color / Atom feed
From: Horatiu Vultur <horatiu.vultur@microchip.com>
To: <nikolay@cumulusnetworks.com>, <roopa@cumulusnetworks.com>,
	<davem@davemloft.net>, <kuba@kernel.org>, <jiri@mellanox.com>,
	<netdev@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<bridge@lists.linux-foundation.org>,
	<UNGLinuxDriver@microchip.com>
Cc: Horatiu Vultur <horatiu.vultur@microchip.com>
Subject: [PATCH net-next v2 3/3] bridge: Extend br_fill_ifinfo to return MPR status
Date: Wed, 1 Jul 2020 09:22:39 +0200
Message-ID: <20200701072239.520807-4-horatiu.vultur@microchip.com> (raw)
In-Reply-To: <20200701072239.520807-1-horatiu.vultur@microchip.com>

This patch extends the function br_fill_ifinfo to return also the MRP
status for each instance on a bridge. It also adds a new filter
RTEXT_FILTER_MRP to return the MRP status only when this is set, not to
interfer with the vlans. The MRP status is return only on the bridge
interfaces.

Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
---
 include/uapi/linux/rtnetlink.h |  1 +
 net/bridge/br_netlink.c        | 29 ++++++++++++++++++++++++++++-
 2 files changed, 29 insertions(+), 1 deletion(-)

diff --git a/include/uapi/linux/rtnetlink.h b/include/uapi/linux/rtnetlink.h
index 879e64950a0a2..9b814c92de123 100644
--- a/include/uapi/linux/rtnetlink.h
+++ b/include/uapi/linux/rtnetlink.h
@@ -778,6 +778,7 @@ enum {
 #define RTEXT_FILTER_BRVLAN	(1 << 1)
 #define RTEXT_FILTER_BRVLAN_COMPRESSED	(1 << 2)
 #define	RTEXT_FILTER_SKIP_STATS	(1 << 3)
+#define RTEXT_FILTER_MRP	(1 << 4)
 
 /* End of information exported to user level */
 
diff --git a/net/bridge/br_netlink.c b/net/bridge/br_netlink.c
index 240e260e3461c..6ecb7c7453dcb 100644
--- a/net/bridge/br_netlink.c
+++ b/net/bridge/br_netlink.c
@@ -453,6 +453,32 @@ static int br_fill_ifinfo(struct sk_buff *skb,
 		rcu_read_unlock();
 		if (err)
 			goto nla_put_failure;
+
+		nla_nest_end(skb, af);
+	}
+
+	if (filter_mask & RTEXT_FILTER_MRP) {
+		struct nlattr *af;
+		int err;
+
+		/* RCU needed because of the VLAN locking rules (rcu || rtnl) */
+		rcu_read_lock();
+		if (!br_mrp_enabled(br) || port) {
+			rcu_read_unlock();
+			goto done;
+		}
+		af = nla_nest_start_noflag(skb, IFLA_AF_SPEC);
+		if (!af) {
+			rcu_read_unlock();
+			goto nla_put_failure;
+		}
+
+		err = br_mrp_fill_info(skb, br);
+
+		rcu_read_unlock();
+		if (err)
+			goto nla_put_failure;
+
 		nla_nest_end(skb, af);
 	}
 
@@ -516,7 +542,8 @@ int br_getlink(struct sk_buff *skb, u32 pid, u32 seq,
 	struct net_bridge_port *port = br_port_get_rtnl(dev);
 
 	if (!port && !(filter_mask & RTEXT_FILTER_BRVLAN) &&
-	    !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED))
+	    !(filter_mask & RTEXT_FILTER_BRVLAN_COMPRESSED) &&
+	    !(filter_mask & RTEXT_FILTER_MRP))
 		return 0;
 
 	return br_fill_ifinfo(skb, port, pid, seq, RTM_NEWLINK, nlflags,
-- 
2.27.0


  parent reply index

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-01  7:22 [PATCH net-next v2 0/3] bridge: mrp: Add support for getting the status Horatiu Vultur
2020-07-01  7:22 ` [PATCH net-next v2 1/3] bridge: uapi: mrp: Extend MRP attributes to get " Horatiu Vultur
2020-07-01  7:22 ` [PATCH net-next v2 2/3] bridge: mrp: Add br_mrp_fill_info Horatiu Vultur
2020-07-01  7:22 ` Horatiu Vultur [this message]
2020-07-01  9:51   ` [PATCH net-next v2 3/3] bridge: Extend br_fill_ifinfo to return MPR status Nikolay Aleksandrov
2020-07-01 13:19     ` Horatiu Vultur

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=20200701072239.520807-4-horatiu.vultur@microchip.com \
    --to=horatiu.vultur@microchip.com \
    --cc=UNGLinuxDriver@microchip.com \
    --cc=bridge@lists.linux-foundation.org \
    --cc=davem@davemloft.net \
    --cc=jiri@mellanox.com \
    --cc=kuba@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=netdev@vger.kernel.org \
    --cc=nikolay@cumulusnetworks.com \
    --cc=roopa@cumulusnetworks.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

LKML Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/lkml/0 lkml/git/0.git
	git clone --mirror https://lore.kernel.org/lkml/1 lkml/git/1.git
	git clone --mirror https://lore.kernel.org/lkml/2 lkml/git/2.git
	git clone --mirror https://lore.kernel.org/lkml/3 lkml/git/3.git
	git clone --mirror https://lore.kernel.org/lkml/4 lkml/git/4.git
	git clone --mirror https://lore.kernel.org/lkml/5 lkml/git/5.git
	git clone --mirror https://lore.kernel.org/lkml/6 lkml/git/6.git
	git clone --mirror https://lore.kernel.org/lkml/7 lkml/git/7.git
	git clone --mirror https://lore.kernel.org/lkml/8 lkml/git/8.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 lkml lkml/ https://lore.kernel.org/lkml \
		linux-kernel@vger.kernel.org
	public-inbox-index lkml

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-kernel


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git