netdev - [PATCH net-next 6/6] net: dsa: remove cross-chip support from the MRP notifiers

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210618183017.3340769-7-olteanv@gmail.com>
Date:   Fri, 18 Jun 2021 21:30:17 +0300
From:   Vladimir Oltean <olteanv@...il.com>
To:     Jakub Kicinski <kuba@...nel.org>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org
Cc:     Florian Fainelli <f.fainelli@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Vladimir Oltean <vladimir.oltean@....com>,
        Horatiu Vultur <horatiu.vultur@...rochip.com>
Subject: [PATCH net-next 6/6] net: dsa: remove cross-chip support from the MRP notifiers

From: Vladimir Oltean <vladimir.oltean@....com>

With MRP hardware assist being supported only by the ocelot switch
family, which by design does not support cross-chip bridging, the
current match functions are at best a guess and have not been confirmed
in any way to do anything relevant in a multi-switch topology.

Drop the code and make the notifiers match only on the targeted switch
port.

Cc: Horatiu Vultur <horatiu.vultur@...rochip.com>
Signed-off-by: Vladimir Oltean <vladimir.oltean@....com>
---
 net/dsa/switch.c | 53 +++++++-----------------------------------------
 1 file changed, 7 insertions(+), 46 deletions(-)

diff --git a/net/dsa/switch.c b/net/dsa/switch.c
index 75f567390a6b..7e948bf15fe0 100644
--- a/net/dsa/switch.c
+++ b/net/dsa/switch.c
@@ -346,36 +346,16 @@ static int dsa_switch_change_tag_proto(struct dsa_switch *ds,
 	return 0;
 }
 
-static bool dsa_switch_mrp_match(struct dsa_switch *ds, int port,
-				 struct dsa_notifier_mrp_info *info)
-{
-	if (ds->index == info->sw_index && port == info->port)
-		return true;
-
-	if (dsa_is_dsa_port(ds, port))
-		return true;
-
-	return false;
-}
-
 static int dsa_switch_mrp_add(struct dsa_switch *ds,
 			      struct dsa_notifier_mrp_info *info)
 {
-	int err = 0;
-	int port;
-
 	if (!ds->ops->port_mrp_add)
 		return -EOPNOTSUPP;
 
-	for (port = 0; port < ds->num_ports; port++) {
-		if (dsa_switch_mrp_match(ds, port, info)) {
-			err = ds->ops->port_mrp_add(ds, port, info->mrp);
-			if (err)
-				break;
-		}
-	}
+	if (ds->index == info->sw_index)
+		return ds->ops->port_mrp_add(ds, info->port, info->mrp);
 
-	return err;
+	return 0;
 }
 
 static int dsa_switch_mrp_del(struct dsa_switch *ds,
@@ -390,39 +370,20 @@ static int dsa_switch_mrp_del(struct dsa_switch *ds,
 	return 0;
 }
 
-static bool
-dsa_switch_mrp_ring_role_match(struct dsa_switch *ds, int port,
-			       struct dsa_notifier_mrp_ring_role_info *info)
-{
-	if (ds->index == info->sw_index && port == info->port)
-		return true;
-
-	if (dsa_is_dsa_port(ds, port))
-		return true;
-
-	return false;
-}
-
 static int
 dsa_switch_mrp_add_ring_role(struct dsa_switch *ds,
 			     struct dsa_notifier_mrp_ring_role_info *info)
 {
 	int err = 0;
-	int port;
 
 	if (!ds->ops->port_mrp_add)
 		return -EOPNOTSUPP;
 
-	for (port = 0; port < ds->num_ports; port++) {
-		if (dsa_switch_mrp_ring_role_match(ds, port, info)) {
-			err = ds->ops->port_mrp_add_ring_role(ds, port,
-							      info->mrp);
-			if (err)
-				break;
-		}
-	}
+	if (ds->index == info->sw_index)
+		return ds->ops->port_mrp_add_ring_role(ds, info->port,
+						       info->mrp);
 
-	return err;
+	return 0;
 }
 
 static int
-- 
2.25.1