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Subject[PATCH net-next 18/20] net: dsa: add FDB notifier
Date
Add two new DSA_NOTIFIER_FDB_ADD and DSA_NOTIFIER_FDB_DEL events to
notify not only a single switch, but all switches of a the fabric when
an FDB entry is added or removed.

For the moment, keep the current behavior and ignore other switches.

Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
---
net/dsa/dsa_priv.h | 10 ++++++++++
net/dsa/port.c | 31 ++++++++++++++-----------------
net/dsa/switch.c | 43 +++++++++++++++++++++++++++++++++++++++++++
3 files changed, 67 insertions(+), 17 deletions(-)

diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h
index becaf8a61b13..6a7d0d7d0489 100644
--- a/net/dsa/dsa_priv.h
+++ b/net/dsa/dsa_priv.h
@@ -20,6 +20,8 @@ enum {
DSA_NOTIFIER_AGEING_TIME,
DSA_NOTIFIER_BRIDGE_JOIN,
DSA_NOTIFIER_BRIDGE_LEAVE,
+ DSA_NOTIFIER_FDB_ADD,
+ DSA_NOTIFIER_FDB_DEL,
};

/* DSA_NOTIFIER_AGEING_TIME */
@@ -36,6 +38,14 @@ struct dsa_notifier_bridge_info {
int port;
};

+/* DSA_NOTIFIER_FDB_* */
+struct dsa_notifier_fdb_info {
+ const struct switchdev_obj_port_fdb *fdb;
+ struct switchdev_trans *trans;
+ int sw_index;
+ int port;
+};
+
struct dsa_device_ops {
struct sk_buff *(*xmit)(struct sk_buff *skb, struct net_device *dev);
struct sk_buff *(*rcv)(struct sk_buff *skb, struct net_device *dev,
diff --git a/net/dsa/port.c b/net/dsa/port.c
index 59328a35394d..ed88d8381642 100644
--- a/net/dsa/port.c
+++ b/net/dsa/port.c
@@ -151,29 +151,26 @@ int dsa_port_fdb_add(struct dsa_port *dp,
const struct switchdev_obj_port_fdb *fdb,
struct switchdev_trans *trans)
{
- struct dsa_switch *ds = dp->ds;
-
- if (switchdev_trans_ph_prepare(trans)) {
- if (!ds->ops->port_fdb_prepare || !ds->ops->port_fdb_add)
- return -EOPNOTSUPP;
-
- return ds->ops->port_fdb_prepare(ds, dp->index, fdb, trans);
- }
-
- ds->ops->port_fdb_add(ds, dp->index, fdb, trans);
-
- return 0;
+ struct dsa_notifier_fdb_info info = {
+ .sw_index = dp->ds->index,
+ .port = dp->index,
+ .trans = trans,
+ .fdb = fdb,
+ };
+
+ return dsa_port_notify(dp, DSA_NOTIFIER_FDB_ADD, &info);
}

int dsa_port_fdb_del(struct dsa_port *dp,
const struct switchdev_obj_port_fdb *fdb)
{
- struct dsa_switch *ds = dp->ds;
+ struct dsa_notifier_fdb_info info = {
+ .sw_index = dp->ds->index,
+ .port = dp->index,
+ .fdb = fdb,
+ };

- if (ds->ops->port_fdb_del)
- return -EOPNOTSUPP;
-
- return ds->ops->port_fdb_del(ds, dp->index, fdb);
+ return dsa_port_notify(dp, DSA_NOTIFIER_FDB_DEL, &info);
}

int dsa_port_fdb_dump(struct dsa_port *dp, struct switchdev_obj_port_fdb *fdb,
diff --git a/net/dsa/switch.c b/net/dsa/switch.c
index 540770ecc8b0..e71cc860d32c 100644
--- a/net/dsa/switch.c
+++ b/net/dsa/switch.c
@@ -84,6 +84,43 @@ static int dsa_switch_bridge_leave(struct dsa_switch *ds,
return 0;
}

+static int dsa_switch_fdb_add(struct dsa_switch *ds,
+ struct dsa_notifier_fdb_info *info)
+{
+ const struct switchdev_obj_port_fdb *fdb = info->fdb;
+ struct switchdev_trans *trans = info->trans;
+
+ /* Do not care yet about other switch chips of the fabric */
+ if (ds->index != info->sw_index)
+ return 0;
+
+ if (switchdev_trans_ph_prepare(trans)) {
+ if (!ds->ops->port_fdb_prepare || !ds->ops->port_fdb_add)
+ return -EOPNOTSUPP;
+
+ return ds->ops->port_fdb_prepare(ds, info->port, fdb, trans);
+ }
+
+ ds->ops->port_fdb_add(ds, info->port, fdb, trans);
+
+ return 0;
+}
+
+static int dsa_switch_fdb_del(struct dsa_switch *ds,
+ struct dsa_notifier_fdb_info *info)
+{
+ const struct switchdev_obj_port_fdb *fdb = info->fdb;
+
+ /* Do not care yet about other switch chips of the fabric */
+ if (ds->index != info->sw_index)
+ return 0;
+
+ if (!ds->ops->port_fdb_del)
+ return -EOPNOTSUPP;
+
+ return ds->ops->port_fdb_del(ds, info->port, fdb);
+}
+
static int dsa_switch_event(struct notifier_block *nb,
unsigned long event, void *info)
{
@@ -100,6 +137,12 @@ static int dsa_switch_event(struct notifier_block *nb,
case DSA_NOTIFIER_BRIDGE_LEAVE:
err = dsa_switch_bridge_leave(ds, info);
break;
+ case DSA_NOTIFIER_FDB_ADD:
+ err = dsa_switch_fdb_add(ds, info);
+ break;
+ case DSA_NOTIFIER_FDB_DEL:
+ err = dsa_switch_fdb_del(ds, info);
+ break;
default:
err = -EOPNOTSUPP;
break;
--
2.13.0
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