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Diffstat (limited to 'net/bridge/br_vlan.c')
-rw-r--r--net/bridge/br_vlan.c137
1 files changed, 100 insertions, 37 deletions
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index 1402d5ca242d..0f5e75ccac79 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -34,53 +34,70 @@ static struct net_bridge_vlan *br_vlan_lookup(struct rhashtable *tbl, u16 vid)
return rhashtable_lookup_fast(tbl, &vid, br_vlan_rht_params);
}
-static bool __vlan_add_pvid(struct net_bridge_vlan_group *vg,
+static void __vlan_add_pvid(struct net_bridge_vlan_group *vg,
const struct net_bridge_vlan *v)
{
if (vg->pvid == v->vid)
- return false;
+ return;
smp_wmb();
br_vlan_set_pvid_state(vg, v->state);
vg->pvid = v->vid;
-
- return true;
}
-static bool __vlan_delete_pvid(struct net_bridge_vlan_group *vg, u16 vid)
+static void __vlan_delete_pvid(struct net_bridge_vlan_group *vg, u16 vid)
{
if (vg->pvid != vid)
- return false;
+ return;
smp_wmb();
vg->pvid = 0;
-
- return true;
}
-/* return true if anything changed, false otherwise */
-static bool __vlan_add_flags(struct net_bridge_vlan *v, u16 flags)
+/* Update the BRIDGE_VLAN_INFO_PVID and BRIDGE_VLAN_INFO_UNTAGGED flags of @v.
+ * If @commit is false, return just whether the BRIDGE_VLAN_INFO_PVID and
+ * BRIDGE_VLAN_INFO_UNTAGGED bits of @flags would produce any change onto @v.
+ */
+static bool __vlan_flags_update(struct net_bridge_vlan *v, u16 flags,
+ bool commit)
{
struct net_bridge_vlan_group *vg;
- u16 old_flags = v->flags;
- bool ret;
+ bool change;
if (br_vlan_is_master(v))
vg = br_vlan_group(v->br);
else
vg = nbp_vlan_group(v->port);
+ /* check if anything would be changed on commit */
+ change = !!(flags & BRIDGE_VLAN_INFO_PVID) == !!(vg->pvid != v->vid) ||
+ ((flags ^ v->flags) & BRIDGE_VLAN_INFO_UNTAGGED);
+
+ if (!commit)
+ goto out;
+
if (flags & BRIDGE_VLAN_INFO_PVID)
- ret = __vlan_add_pvid(vg, v);
+ __vlan_add_pvid(vg, v);
else
- ret = __vlan_delete_pvid(vg, v->vid);
+ __vlan_delete_pvid(vg, v->vid);
if (flags & BRIDGE_VLAN_INFO_UNTAGGED)
v->flags |= BRIDGE_VLAN_INFO_UNTAGGED;
else
v->flags &= ~BRIDGE_VLAN_INFO_UNTAGGED;
- return ret || !!(old_flags ^ v->flags);
+out:
+ return change;
+}
+
+static bool __vlan_flags_would_change(struct net_bridge_vlan *v, u16 flags)
+{
+ return __vlan_flags_update(v, flags, false);
+}
+
+static void __vlan_flags_commit(struct net_bridge_vlan *v, u16 flags)
+{
+ __vlan_flags_update(v, flags, true);
}
static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br,
@@ -92,7 +109,7 @@ static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br,
/* Try switchdev op first. In case it is not supported, fallback to
* 8021q add.
*/
- err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack);
+ err = br_switchdev_port_vlan_add(dev, v->vid, flags, false, extack);
if (err == -EOPNOTSUPP)
return vlan_vid_add(dev, br->vlan_proto, v->vid);
v->priv_flags |= BR_VLFLAG_ADDED_BY_SWITCHDEV;
@@ -209,6 +226,24 @@ static void nbp_vlan_rcu_free(struct rcu_head *rcu)
kfree(v);
}
+static void br_vlan_init_state(struct net_bridge_vlan *v)
+{
+ struct net_bridge *br;
+
+ if (br_vlan_is_master(v))
+ br = v->br;
+ else
+ br = v->port->br;
+
+ if (br_opt_get(br, BROPT_MST_ENABLED)) {
+ br_mst_vlan_init_state(v);
+ return;
+ }
+
+ v->state = BR_STATE_FORWARDING;
+ v->msti = 0;
+}
+
/* This is the shared VLAN add function which works for both ports and bridge
* devices. There are four possible calls to this function in terms of the
* vlan entry type:
@@ -284,9 +319,12 @@ static int __vlan_add(struct net_bridge_vlan *v, u16 flags,
}
br_multicast_port_ctx_init(p, v, &v->port_mcast_ctx);
} else {
- err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack);
- if (err && err != -EOPNOTSUPP)
- goto out;
+ if (br_vlan_should_use(v)) {
+ err = br_switchdev_port_vlan_add(dev, v->vid, flags,
+ false, extack);
+ if (err && err != -EOPNOTSUPP)
+ goto out;
+ }
br_multicast_ctx_init(br, v, &v->br_mcast_ctx);
v->priv_flags |= BR_VLFLAG_GLOBAL_MCAST_ENABLED;
}
@@ -302,7 +340,7 @@ static int __vlan_add(struct net_bridge_vlan *v, u16 flags,
}
/* set the state before publishing */
- v->state = BR_STATE_FORWARDING;
+ br_vlan_init_state(v);
err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode,
br_vlan_rht_params);
@@ -310,7 +348,7 @@ static int __vlan_add(struct net_bridge_vlan *v, u16 flags,
goto out_fdb_insert;
__vlan_add_list(v);
- __vlan_add_flags(v, flags);
+ __vlan_flags_commit(v, flags);
br_multicast_toggle_one_vlan(v, true);
if (p)
@@ -404,6 +442,7 @@ static void __vlan_flush(const struct net_bridge *br,
{
struct net_bridge_vlan *vlan, *tmp;
u16 v_start = 0, v_end = 0;
+ int err;
__vlan_delete_pvid(vg, vg->pvid);
list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist) {
@@ -417,7 +456,13 @@ static void __vlan_flush(const struct net_bridge *br,
}
v_end = vlan->vid;
- __vlan_del(vlan);
+ err = __vlan_del(vlan);
+ if (err) {
+ br_err(br,
+ "port %u(%s) failed to delete vlan %d: %pe\n",
+ (unsigned int) p->port_no, p->dev->name,
+ vlan->vid, ERR_PTR(err));
+ }
}
/* notify about the last/whole vlan range */
@@ -670,18 +715,29 @@ static int br_vlan_add_existing(struct net_bridge *br,
u16 flags, bool *changed,
struct netlink_ext_ack *extack)
{
+ bool would_change = __vlan_flags_would_change(vlan, flags);
+ bool becomes_brentry = false;
int err;
- err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags, extack);
- if (err && err != -EOPNOTSUPP)
- return err;
-
if (!br_vlan_is_brentry(vlan)) {
/* Trying to change flags of non-existent bridge vlan */
- if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) {
- err = -EINVAL;
- goto err_flags;
- }
+ if (!(flags & BRIDGE_VLAN_INFO_BRENTRY))
+ return -EINVAL;
+
+ becomes_brentry = true;
+ }
+
+ /* Master VLANs that aren't brentries weren't notified before,
+ * time to notify them now.
+ */
+ if (becomes_brentry || would_change) {
+ err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags,
+ would_change, extack);
+ if (err && err != -EOPNOTSUPP)
+ return err;
+ }
+
+ if (becomes_brentry) {
/* It was only kept for port vlans, now make it real */
err = br_fdb_add_local(br, NULL, br->dev->dev_addr, vlan->vid);
if (err) {
@@ -696,13 +752,13 @@ static int br_vlan_add_existing(struct net_bridge *br,
br_multicast_toggle_one_vlan(vlan, true);
}
- if (__vlan_add_flags(vlan, flags))
+ __vlan_flags_commit(vlan, flags);
+ if (would_change)
*changed = true;
return 0;
err_fdb_insert:
-err_flags:
br_switchdev_port_vlan_del(br->dev, vlan->vid);
return err;
}
@@ -1247,11 +1303,18 @@ int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags,
*changed = false;
vlan = br_vlan_find(nbp_vlan_group(port), vid);
if (vlan) {
- /* Pass the flags to the hardware bridge */
- ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack);
- if (ret && ret != -EOPNOTSUPP)
- return ret;
- *changed = __vlan_add_flags(vlan, flags);
+ bool would_change = __vlan_flags_would_change(vlan, flags);
+
+ if (would_change) {
+ /* Pass the flags to the hardware bridge */
+ ret = br_switchdev_port_vlan_add(port->dev, vid, flags,
+ true, extack);
+ if (ret && ret != -EOPNOTSUPP)
+ return ret;
+ }
+
+ __vlan_flags_commit(vlan, flags);
+ *changed = would_change;
return 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 19:58:20 +0000