diff mbox series

[v5,net-next,05/15] net: bridge: mst: Notify switchdev drivers of VLAN MSTI migrations

Message ID 20220316150857.2442916-6-tobias@waldekranz.com (mailing list archive)
State Accepted
Commit 6284c723d9b9995cc27ab3c6368a9d95d67111ff
Delegated to: Netdev Maintainers
Headers show
Series net: bridge: Multiple Spanning Trees | expand

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Context Check Description
netdev/tree_selection success Clearly marked for net-next
netdev/fixes_present success Fixes tag not required for -next series
netdev/subject_prefix success Link
netdev/cover_letter success Series has a cover letter
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 49 this patch: 49
netdev/cc_maintainers success CCed 8 of 8 maintainers
netdev/build_clang success Errors and warnings before: 24 this patch: 24
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success No Fixes tag
netdev/build_allmodconfig_warn success Errors and warnings before: 68 this patch: 68
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 109 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Tobias Waldekranz March 16, 2022, 3:08 p.m. UTC 
Whenever a VLAN moves to a new MSTI, send a switchdev notification so
that switchdevs can track a bridge's VID to MSTI mappings.

Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
---
 include/net/switchdev.h   |  7 ++++++
 net/bridge/br_mst.c       | 13 +++++++++++
 net/bridge/br_switchdev.c | 46 +++++++++++++++++++++++++++++++++++++++
 3 files changed, 66 insertions(+)

Comments

Nikolay Aleksandrov March 17, 2022, 8:57 a.m. UTC | #1 
On 16/03/2022 17:08, Tobias Waldekranz wrote:
> Whenever a VLAN moves to a new MSTI, send a switchdev notification so
> that switchdevs can track a bridge's VID to MSTI mappings.
> 
> Signed-off-by: Tobias Waldekranz <tobias@waldekranz.com>
> ---
>  include/net/switchdev.h   |  7 ++++++
>  net/bridge/br_mst.c       | 13 +++++++++++
>  net/bridge/br_switchdev.c | 46 +++++++++++++++++++++++++++++++++++++++
>  3 files changed, 66 insertions(+)
> 

Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
diff mbox series

Patch

diff --git a/include/net/switchdev.h b/include/net/switchdev.h
index 85dd004dc9ad..53dfa0f7cf5b 100644
--- a/include/net/switchdev.h
+++ b/include/net/switchdev.h
@@ -29,6 +29,7 @@  enum switchdev_attr_id {
 	SWITCHDEV_ATTR_ID_BRIDGE_MROUTER,
 	SWITCHDEV_ATTR_ID_BRIDGE_MST,
 	SWITCHDEV_ATTR_ID_MRP_PORT_ROLE,
+	SWITCHDEV_ATTR_ID_VLAN_MSTI,
 };
 
 struct switchdev_brport_flags {
@@ -36,6 +37,11 @@  struct switchdev_brport_flags {
 	unsigned long mask;
 };
 
+struct switchdev_vlan_msti {
+	u16 vid;
+	u16 msti;
+};
+
 struct switchdev_attr {
 	struct net_device *orig_dev;
 	enum switchdev_attr_id id;
@@ -52,6 +58,7 @@  struct switchdev_attr {
 		bool mst;				/* BRIDGE_MST */
 		bool mc_disabled;			/* MC_DISABLED */
 		u8 mrp_port_role;			/* MRP_PORT_ROLE */
+		struct switchdev_vlan_msti vlan_msti;	/* VLAN_MSTI */
 	} u;
 };
 
diff --git a/net/bridge/br_mst.c b/net/bridge/br_mst.c
index 43ca6b97c5c3..29266174e6b4 100644
--- a/net/bridge/br_mst.c
+++ b/net/bridge/br_mst.c
@@ -69,13 +69,26 @@  static void br_mst_vlan_sync_state(struct net_bridge_vlan *pv, u16 msti)
 
 int br_mst_vlan_set_msti(struct net_bridge_vlan *mv, u16 msti)
 {
+	struct switchdev_attr attr = {
+		.id = SWITCHDEV_ATTR_ID_VLAN_MSTI,
+		.orig_dev = mv->br->dev,
+		.u.vlan_msti = {
+			.vid = mv->vid,
+			.msti = msti,
+		},
+	};
 	struct net_bridge_vlan_group *vg;
 	struct net_bridge_vlan *pv;
 	struct net_bridge_port *p;
+	int err;
 
 	if (mv->msti == msti)
 		return 0;
 
+	err = switchdev_port_attr_set(mv->br->dev, &attr, NULL);
+	if (err && err != -EOPNOTSUPP)
+		return err;
+
 	mv->msti = msti;
 
 	list_for_each_entry(p, &mv->br->port_list, list) {
diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c
index 6f6a70121a5e..8cc44c367231 100644
--- a/net/bridge/br_switchdev.c
+++ b/net/bridge/br_switchdev.c
@@ -331,6 +331,46 @@  br_switchdev_fdb_replay(const struct net_device *br_dev, const void *ctx,
 	return err;
 }
 
+static int br_switchdev_vlan_attr_replay(struct net_device *br_dev,
+					 const void *ctx,
+					 struct notifier_block *nb,
+					 struct netlink_ext_ack *extack)
+{
+	struct switchdev_notifier_port_attr_info attr_info = {
+		.info = {
+			.dev = br_dev,
+			.extack = extack,
+			.ctx = ctx,
+		},
+	};
+	struct net_bridge *br = netdev_priv(br_dev);
+	struct net_bridge_vlan_group *vg;
+	struct switchdev_attr attr;
+	struct net_bridge_vlan *v;
+	int err;
+
+	attr_info.attr = &attr;
+	attr.orig_dev = br_dev;
+
+	vg = br_vlan_group(br);
+
+	list_for_each_entry(v, &vg->vlan_list, vlist) {
+		if (v->msti) {
+			attr.id = SWITCHDEV_ATTR_ID_VLAN_MSTI;
+			attr.u.vlan_msti.vid = v->vid;
+			attr.u.vlan_msti.msti = v->msti;
+
+			err = nb->notifier_call(nb, SWITCHDEV_PORT_ATTR_SET,
+						&attr_info);
+			err = notifier_to_errno(err);
+			if (err)
+				return err;
+		}
+	}
+
+	return 0;
+}
+
 static int
 br_switchdev_vlan_replay_one(struct notifier_block *nb,
 			     struct net_device *dev,
@@ -425,6 +465,12 @@  static int br_switchdev_vlan_replay(struct net_device *br_dev,
 			return err;
 	}
 
+	if (adding) {
+		err = br_switchdev_vlan_attr_replay(br_dev, ctx, nb, extack);
+		if (err)
+			return err;
+	}
+
 	return 0;
 }