diff options
| -rw-r--r-- | include/net/dsa.h | 10 | ||||
| -rw-r--r-- | include/net/switchdev.h | 46 | ||||
| -rw-r--r-- | net/bridge/br_private.h | 6 | ||||
| -rw-r--r-- | net/bridge/br_switchdev.c | 95 | ||||
| -rw-r--r-- | net/bridge/br_vlan.c | 108 | ||||
| -rw-r--r-- | net/dsa/dsa2.c | 8 | ||||
| -rw-r--r-- | net/dsa/dsa_priv.h | 7 | ||||
| -rw-r--r-- | net/dsa/port.c | 42 | ||||
| -rw-r--r-- | net/dsa/slave.c | 112 | ||||
| -rw-r--r-- | net/dsa/switch.c | 187 | ||||
| -rw-r--r-- | net/switchdev/switchdev.c | 152 |
11 files changed, 623 insertions, 150 deletions
diff --git a/include/net/dsa.h b/include/net/dsa.h index fd1f62a6e0a8..85cb9aed4c51 100644 --- a/include/net/dsa.h +++ b/include/net/dsa.h @@ -312,6 +312,10 @@ struct dsa_port { struct mutex addr_lists_lock; struct list_head fdbs; struct list_head mdbs; + + /* List of VLANs that CPU and DSA ports are members of. */ + struct mutex vlans_lock; + struct list_head vlans; }; /* TODO: ideally DSA ports would have a single dp->link_dp member, @@ -332,6 +336,12 @@ struct dsa_mac_addr { struct list_head list; }; +struct dsa_vlan { + u16 vid; + refcount_t refcount; + struct list_head list; +}; + struct dsa_switch { struct device *dev; diff --git a/include/net/switchdev.h b/include/net/switchdev.h index d353793dfeb5..c32e1c8f79ec 100644 --- a/include/net/switchdev.h +++ b/include/net/switchdev.h @@ -81,6 +81,13 @@ struct switchdev_obj_port_vlan { struct switchdev_obj obj; u16 flags; u16 vid; + /* If set, the notifier signifies a change of one of the following + * flags for a VLAN that already exists: + * - BRIDGE_VLAN_INFO_PVID + * - BRIDGE_VLAN_INFO_UNTAGGED + * Entries with BRIDGE_VLAN_INFO_BRENTRY unset are not notified at all. + */ + bool changed; }; #define SWITCHDEV_OBJ_PORT_VLAN(OBJ) \ @@ -317,11 +324,26 @@ int switchdev_handle_port_obj_add(struct net_device *dev, int (*add_cb)(struct net_device *dev, const void *ctx, const struct switchdev_obj *obj, struct netlink_ext_ack *extack)); +int switchdev_handle_port_obj_add_foreign(struct net_device *dev, + struct switchdev_notifier_port_obj_info *port_obj_info, + bool (*check_cb)(const struct net_device *dev), + bool (*foreign_dev_check_cb)(const struct net_device *dev, + const struct net_device *foreign_dev), + int (*add_cb)(struct net_device *dev, const void *ctx, + const struct switchdev_obj *obj, + struct netlink_ext_ack *extack)); int switchdev_handle_port_obj_del(struct net_device *dev, struct switchdev_notifier_port_obj_info *port_obj_info, bool (*check_cb)(const struct net_device *dev), int (*del_cb)(struct net_device *dev, const void *ctx, const struct switchdev_obj *obj)); +int switchdev_handle_port_obj_del_foreign(struct net_device *dev, + struct switchdev_notifier_port_obj_info *port_obj_info, + bool (*check_cb)(const struct net_device *dev), + bool (*foreign_dev_check_cb)(const struct net_device *dev, + const struct net_device *foreign_dev), + int (*del_cb)(struct net_device *dev, const void *ctx, + const struct switchdev_obj *obj)); int switchdev_handle_port_attr_set(struct net_device *dev, struct switchdev_notifier_port_attr_info *port_attr_info, @@ -440,6 +462,18 @@ switchdev_handle_port_obj_add(struct net_device *dev, return 0; } +static inline int switchdev_handle_port_obj_add_foreign(struct net_device *dev, + struct switchdev_notifier_port_obj_info *port_obj_info, + bool (*check_cb)(const struct net_device *dev), + bool (*foreign_dev_check_cb)(const struct net_device *dev, + const struct net_device *foreign_dev), + int (*add_cb)(struct net_device *dev, const void *ctx, + const struct switchdev_obj *obj, + struct netlink_ext_ack *extack)) +{ + return 0; +} + static inline int switchdev_handle_port_obj_del(struct net_device *dev, struct switchdev_notifier_port_obj_info *port_obj_info, @@ -451,6 +485,18 @@ switchdev_handle_port_obj_del(struct net_device *dev, } static inline int +switchdev_handle_port_obj_del_foreign(struct net_device *dev, + struct switchdev_notifier_port_obj_info *port_obj_info, + bool (*check_cb)(const struct net_device *dev), + bool (*foreign_dev_check_cb)(const struct net_device *dev, + const struct net_device *foreign_dev), + int (*del_cb)(struct net_device *dev, const void *ctx, + const struct switchdev_obj *obj)) +{ + return 0; +} + +static inline int switchdev_handle_port_attr_set(struct net_device *dev, struct switchdev_notifier_port_attr_info *port_attr_info, bool (*check_cb)(const struct net_device *dev), diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 2661dda1a92b..48bc61ebc211 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -1985,7 +1985,7 @@ void br_switchdev_mdb_notify(struct net_device *dev, struct net_bridge_port_group *pg, int type); int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, - struct netlink_ext_ack *extack); + bool changed, struct netlink_ext_ack *extack); int br_switchdev_port_vlan_del(struct net_device *dev, u16 vid); void br_switchdev_init(struct net_bridge *br); @@ -2052,8 +2052,8 @@ static inline int br_switchdev_set_port_flag(struct net_bridge_port *p, return 0; } -static inline int br_switchdev_port_vlan_add(struct net_device *dev, - u16 vid, u16 flags, +static inline int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, + u16 flags, bool changed, struct netlink_ext_ack *extack) { return -EOPNOTSUPP; diff --git a/net/bridge/br_switchdev.c b/net/bridge/br_switchdev.c index f8fbaaa7c501..59fcabd08ef1 100644 --- a/net/bridge/br_switchdev.c +++ b/net/bridge/br_switchdev.c @@ -160,13 +160,14 @@ br_switchdev_fdb_notify(struct net_bridge *br, } int br_switchdev_port_vlan_add(struct net_device *dev, u16 vid, u16 flags, - struct netlink_ext_ack *extack) + bool changed, struct netlink_ext_ack *extack) { struct switchdev_obj_port_vlan v = { .obj.orig_dev = dev, .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, .flags = flags, .vid = vid, + .changed = changed, }; return switchdev_port_obj_add(dev, &v.obj, extack); @@ -351,51 +352,19 @@ br_switchdev_vlan_replay_one(struct notifier_block *nb, return notifier_to_errno(err); } -static int br_switchdev_vlan_replay(struct net_device *br_dev, - struct net_device *dev, - const void *ctx, bool adding, - struct notifier_block *nb, - struct netlink_ext_ack *extack) +static int br_switchdev_vlan_replay_group(struct notifier_block *nb, + struct net_device *dev, + struct net_bridge_vlan_group *vg, + const void *ctx, unsigned long action, + struct netlink_ext_ack *extack) { - struct net_bridge_vlan_group *vg; struct net_bridge_vlan *v; - struct net_bridge_port *p; - struct net_bridge *br; - unsigned long action; int err = 0; u16 pvid; - ASSERT_RTNL(); - - if (!nb) - return 0; - - if (!netif_is_bridge_master(br_dev)) - return -EINVAL; - - if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) - return -EINVAL; - - if (netif_is_bridge_master(dev)) { - br = netdev_priv(dev); - vg = br_vlan_group(br); - p = NULL; - } else { - p = br_port_get_rtnl(dev); - if (WARN_ON(!p)) - return -EINVAL; - vg = nbp_vlan_group(p); - br = p->br; - } - if (!vg) return 0; - if (adding) - action = SWITCHDEV_PORT_OBJ_ADD; - else - action = SWITCHDEV_PORT_OBJ_DEL; - pvid = br_get_pvid(vg); list_for_each_entry(v, &vg->vlan_list, vlist) { @@ -415,7 +384,48 @@ static int br_switchdev_vlan_replay(struct net_device *br_dev, return err; } - return err; + return 0; +} + +static int br_switchdev_vlan_replay(struct net_device *br_dev, + const void *ctx, bool adding, + struct notifier_block *nb, + struct netlink_ext_ack *extack) +{ + struct net_bridge *br = netdev_priv(br_dev); + struct net_bridge_port *p; + unsigned long action; + int err; + + ASSERT_RTNL(); + + if (!nb) + return 0; + + if (!netif_is_bridge_master(br_dev)) + return -EINVAL; + + if (adding) + action = SWITCHDEV_PORT_OBJ_ADD; + else + action = SWITCHDEV_PORT_OBJ_DEL; + + err = br_switchdev_vlan_replay_group(nb, br_dev, br_vlan_group(br), + ctx, action, extack); + if (err) + return err; + + list_for_each_entry(p, &br->port_list, list) { + struct net_device *dev = p->dev; + + err = br_switchdev_vlan_replay_group(nb, dev, + nbp_vlan_group(p), + ctx, action, extack); + if (err) + return err; + } + + return 0; } #ifdef CONFIG_BRIDGE_IGMP_SNOOPING @@ -681,8 +691,7 @@ static int nbp_switchdev_sync_objs(struct net_bridge_port *p, const void *ctx, struct net_device *dev = p->dev; int err; - err = br_switchdev_vlan_replay(br_dev, dev, ctx, true, blocking_nb, - extack); + err = br_switchdev_vlan_replay(br_dev, ctx, true, blocking_nb, extack); if (err && err != -EOPNOTSUPP) return err; @@ -706,11 +715,11 @@ static void nbp_switchdev_unsync_objs(struct net_bridge_port *p, struct net_device *br_dev = p->br->dev; struct net_device *dev = p->dev; - br_switchdev_vlan_replay(br_dev, dev, ctx, false, blocking_nb, NULL); + br_switchdev_fdb_replay(br_dev, ctx, false, atomic_nb); br_switchdev_mdb_replay(br_dev, dev, ctx, false, blocking_nb, NULL); - br_switchdev_fdb_replay(br_dev, ctx, false, atomic_nb); + br_switchdev_vlan_replay(br_dev, ctx, false, blocking_nb, NULL); } /* Let the bridge know that this port is offloaded, so that it can assign a diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c index 6315e43a7a3e..7557e90b60e1 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; @@ -284,9 +301,12 @@ 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; } @@ -310,7 +330,7 @@ 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) @@ -677,18 +697,29 @@ 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) { @@ -703,13 +734,13 @@ 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; } @@ -1254,11 +1285,18 @@ 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; } diff --git a/net/dsa/dsa2.c b/net/dsa/dsa2.c index e498c927c3d0..408b79a28cd4 100644 --- a/net/dsa/dsa2.c +++ b/net/dsa/dsa2.c @@ -453,8 +453,10 @@ static int dsa_port_setup(struct dsa_port *dp) return 0; mutex_init(&dp->addr_lists_lock); + mutex_init(&dp->vlans_lock); INIT_LIST_HEAD(&dp->fdbs); INIT_LIST_HEAD(&dp->mdbs); + INIT_LIST_HEAD(&dp->vlans); if (ds->ops->port_setup) { err = ds->ops->port_setup(ds, dp->index); @@ -563,6 +565,7 @@ static void dsa_port_teardown(struct dsa_port *dp) struct dsa_switch *ds = dp->ds; struct dsa_mac_addr *a, *tmp; struct net_device *slave; + struct dsa_vlan *v, *n; if (!dp->setup) return; @@ -603,6 +606,11 @@ static void dsa_port_teardown(struct dsa_port *dp) kfree(a); } + list_for_each_entry_safe(v, n, &dp->vlans, list) { + list_del(&v->list); + kfree(v); + } + dp->setup = false; } diff --git a/net/dsa/dsa_priv.h b/net/dsa/dsa_priv.h index 2bbfa9efe9f8..6a3878157b0a 100644 --- a/net/dsa/dsa_priv.h +++ b/net/dsa/dsa_priv.h @@ -34,6 +34,8 @@ enum { DSA_NOTIFIER_HOST_MDB_DEL, DSA_NOTIFIER_VLAN_ADD, DSA_NOTIFIER_VLAN_DEL, + DSA_NOTIFIER_HOST_VLAN_ADD, + DSA_NOTIFIER_HOST_VLAN_DEL, DSA_NOTIFIER_MTU, DSA_NOTIFIER_TAG_PROTO, DSA_NOTIFIER_TAG_PROTO_CONNECT, @@ -234,6 +236,11 @@ int dsa_port_vlan_add(struct dsa_port *dp, struct netlink_ext_ack *extack); int dsa_port_vlan_del(struct dsa_port *dp, const struct switchdev_obj_port_vlan *vlan); +int dsa_port_host_vlan_add(struct dsa_port *dp, + const struct switchdev_obj_port_vlan *vlan, + struct netlink_ext_ack *extack); +int dsa_port_host_vlan_del(struct dsa_port *dp, + const struct switchdev_obj_port_vlan *vlan); int dsa_port_mrp_add(const struct dsa_port *dp, const struct switchdev_obj_mrp *mrp); int dsa_port_mrp_del(const struct dsa_port *dp, diff --git a/net/dsa/port.c b/net/dsa/port.c index bd78192e0e47..cca5cf686f74 100644 --- a/net/dsa/port.c +++ b/net/dsa/port.c @@ -904,6 +904,48 @@ int dsa_port_vlan_del(struct dsa_port *dp, return dsa_port_notify(dp, DSA_NOTIFIER_VLAN_DEL, &info); } +int dsa_port_host_vlan_add(struct dsa_port *dp, + const struct switchdev_obj_port_vlan *vlan, + struct netlink_ext_ack *extack) +{ + struct dsa_notifier_vlan_info info = { + .sw_index = dp->ds->index, + .port = dp->index, + .vlan = vlan, + .extack = extack, + }; + struct dsa_port *cpu_dp = dp->cpu_dp; + int err; + + err = dsa_port_notify(dp, DSA_NOTIFIER_HOST_VLAN_ADD, &info); + if (err && err != -EOPNOTSUPP) + return err; + + vlan_vid_add(cpu_dp->master, htons(ETH_P_8021Q), vlan->vid); + + return err; +} + +int dsa_port_host_vlan_del(struct dsa_port *dp, + const struct switchdev_obj_port_vlan *vlan) +{ + struct dsa_notifier_vlan_info info = { + .sw_index = dp->ds->index, + .port = dp->index, + .vlan = vlan, + }; + struct dsa_port *cpu_dp = dp->cpu_dp; + int err; + + err = dsa_port_notify(dp, DSA_NOTIFIER_HOST_VLAN_DEL, &info); + if (err && err != -EOPNOTSUPP) + return err; + + vlan_vid_del(cpu_dp->master, htons(ETH_P_8021Q), vlan->vid); + + return err; +} + int dsa_port_mrp_add(const struct dsa_port *dp, const struct switchdev_obj_mrp *mrp) { diff --git a/net/dsa/slave.c b/net/dsa/slave.c index 2f6caf5d037e..f61e6b72ffbb 100644 --- a/net/dsa/slave.c +++ b/net/dsa/slave.c @@ -348,9 +348,8 @@ static int dsa_slave_vlan_add(struct net_device *dev, const struct switchdev_obj *obj, struct netlink_ext_ack *extack) { - struct net_device *master = dsa_slave_to_master(dev); struct dsa_port *dp = dsa_slave_to_port(dev); - struct switchdev_obj_port_vlan vlan; + struct switchdev_obj_port_vlan *vlan; int err; if (dsa_port_skip_vlan_configuration(dp)) { @@ -358,14 +357,14 @@ static int dsa_slave_vlan_add(struct net_device *dev, return 0; } - vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj); + vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); /* Deny adding a bridge VLAN when there is already an 802.1Q upper with * the same VID. */ if (br_vlan_enabled(dsa_port_bridge_dev_get(dp))) { rcu_read_lock(); - err = dsa_slave_vlan_check_for_8021q_uppers(dev, &vlan); + err = dsa_slave_vlan_check_for_8021q_uppers(dev, vlan); rcu_read_unlock(); if (err) { NL_SET_ERR_MSG_MOD(extack, @@ -374,21 +373,36 @@ static int dsa_slave_vlan_add(struct net_device *dev, } } - err = dsa_port_vlan_add(dp, &vlan, extack); - if (err) - return err; + return dsa_port_vlan_add(dp, vlan, extack); +} + +/* Offload a VLAN installed on the bridge or on a foreign interface by + * installing it as a VLAN towards the CPU port. + */ +static int dsa_slave_host_vlan_add(struct net_device *dev, + const struct switchdev_obj *obj, + struct netlink_ext_ack *extack) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct switchdev_obj_port_vlan vlan; + + /* Do nothing if this is a software bridge */ + if (!dp->bridge) + return -EOPNOTSUPP; + + if (dsa_port_skip_vlan_configuration(dp)) { + NL_SET_ERR_MSG_MOD(extack, "skipping configuration of VLAN"); + return 0; + } - /* We need the dedicated CPU port to be a member of the VLAN as well. - * Even though drivers often handle CPU membership in special ways, + vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj); + + /* Even though drivers often handle CPU membership in special ways, * it doesn't make sense to program a PVID, so clear this flag. */ vlan.flags &= ~BRIDGE_VLAN_INFO_PVID; - err = dsa_port_vlan_add(dp->cpu_dp, &vlan, extack); - if (err) - return err; - - return vlan_vid_add(master, htons(ETH_P_8021Q), vlan.vid); + return dsa_port_host_vlan_add(dp, &vlan, extack); } static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx, @@ -415,10 +429,10 @@ static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx, err = dsa_port_host_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); break; case SWITCHDEV_OBJ_ID_PORT_VLAN: - if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) - return -EOPNOTSUPP; - - err = dsa_slave_vlan_add(dev, obj, extack); + if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) + err = dsa_slave_vlan_add(dev, obj, extack); + else + err = dsa_slave_host_vlan_add(dev, obj, extack); break; case SWITCHDEV_OBJ_ID_MRP: if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) @@ -444,26 +458,33 @@ static int dsa_slave_port_obj_add(struct net_device *dev, const void *ctx, static int dsa_slave_vlan_del(struct net_device *dev, const struct switchdev_obj *obj) { - struct net_device *master = dsa_slave_to_master(dev); struct dsa_port *dp = dsa_slave_to_port(dev); struct switchdev_obj_port_vlan *vlan; - int err; if (dsa_port_skip_vlan_configuration(dp)) return 0; vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); - /* Do not deprogram the CPU port as it may be shared with other user - * ports which can be members of this VLAN as well. - */ - err = dsa_port_vlan_del(dp, vlan); - if (err) - return err; + return dsa_port_vlan_del(dp, vlan); +} - vlan_vid_del(master, htons(ETH_P_8021Q), vlan->vid); +static int dsa_slave_host_vlan_del(struct net_device *dev, + const struct switchdev_obj *obj) +{ + struct dsa_port *dp = dsa_slave_to_port(dev); + struct switchdev_obj_port_vlan *vlan; - return 0; + /* Do nothing if this is a software bridge */ + if (!dp->bridge) + return -EOPNOTSUPP; + + if (dsa_port_skip_vlan_configuration(dp)) + return 0; + + vlan = SWITCHDEV_OBJ_PORT_VLAN(obj); + + return dsa_port_host_vlan_del(dp, vlan); } static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx, @@ -489,10 +510,10 @@ static int dsa_slave_port_obj_del(struct net_device *dev, const void *ctx, err = dsa_port_host_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj)); break; case SWITCHDEV_OBJ_ID_PORT_VLAN: - if (!dsa_port_offloads_bridge_port(dp, obj->orig_dev)) - return -EOPNOTSUPP; - - err = dsa_slave_vlan_del(dev, obj); + if (dsa_port_offloads_bridge_port(dp, obj->orig_dev)) + err = dsa_slave_vlan_del(dev, obj); + else + err = dsa_slave_host_vlan_del(dev, obj); break; case SWITCHDEV_OBJ_ID_MRP: if (!dsa_port_offloads_bridge_dev(dp, obj->orig_dev)) @@ -1347,7 +1368,6 @@ static int dsa_slave_get_ts_info(struct net_device *dev, static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto, u16 vid) { - struct net_device *master = dsa_slave_to_master(dev); struct dsa_port *dp = dsa_slave_to_port(dev); struct switchdev_obj_port_vlan vlan = { .obj.id = SWITCHDEV_OBJ_ID_PORT_VLAN, @@ -1367,7 +1387,7 @@ static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto, } /* And CPU port... */ - ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &extack); + ret = dsa_port_host_vlan_add(dp, &vlan, &extack); if (ret) { if (extack._msg) netdev_err(dev, "CPU port %d: %s\n", dp->cpu_dp->index, @@ -1375,13 +1395,12 @@ static int dsa_slave_vlan_rx_add_vid(struct net_device *dev, __be16 proto, return ret; } - return vlan_vid_add(master, proto, vid); + return 0; } static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, u16 vid) { - struct net_device *master = dsa_slave_to_master(dev); struct dsa_port *dp = dsa_slave_to_port(dev); struct switchdev_obj_port_vlan vlan = { .vid = vid, @@ -1390,16 +1409,11 @@ static int dsa_slave_vlan_rx_kill_vid(struct net_device *dev, __be16 proto, }; int err; - /* Do not deprogram the CPU port as it may be shared with other user - * ports which can be members of this VLAN as well. - */ err = dsa_port_vlan_del(dp, &vlan); if (err) return err; - vlan_vid_del(master, proto, vid); - - return 0; + return dsa_port_host_vlan_del(dp, &vlan); } static int dsa_slave_restore_vlan(struct net_device *vdev, int vid, void *arg) @@ -2530,14 +2544,16 @@ static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused, switch (event) { case SWITCHDEV_PORT_OBJ_ADD: - err = switchdev_handle_port_obj_add(dev, ptr, - dsa_slave_dev_check, - dsa_slave_port_obj_add); + err = switchdev_handle_port_obj_add_foreign(dev, ptr, + dsa_slave_dev_check, + dsa_foreign_dev_check, + dsa_slave_port_obj_add); return notifier_from_errno(err); case SWITCHDEV_PORT_OBJ_DEL: - err = switchdev_handle_port_obj_del(dev, ptr, - dsa_slave_dev_check, - dsa_slave_port_obj_del); + err = switchdev_handle_port_obj_del_foreign(dev, ptr, + dsa_slave_dev_check, + dsa_foreign_dev_check, + dsa_slave_port_obj_del); return notifier_from_errno(err); case SWITCHDEV_PORT_ATTR_SET: err = switchdev_handle_port_attr_set(dev, ptr, diff --git a/net/dsa/switch.c b/net/dsa/switch.c index 4866b58649e4..0bb3987bd4e6 100644 --- a/net/dsa/switch.c +++ b/net/dsa/switch.c @@ -558,6 +558,7 @@ static int dsa_switch_host_mdb_del(struct dsa_switch *ds, return err; } +/* Port VLANs match on the targeted port and on all DSA ports */ static bool dsa_port_vlan_match(struct dsa_port *dp, struct dsa_notifier_vlan_info *info) { @@ -570,6 +571,126 @@ static bool dsa_port_vlan_match(struct dsa_port *dp, return false; } +/* Host VLANs match on the targeted port's CPU port, and on all DSA ports + * (upstream and downstream) of that switch and its upstream switches. + */ +static bool dsa_port_host_vlan_match(struct dsa_port *dp, + struct dsa_notifier_vlan_info *info) +{ + struct dsa_port *targeted_dp, *cpu_dp; + struct dsa_switch *targeted_ds; + + targeted_ds = dsa_switch_find(dp->ds->dst->index, info->sw_index); + targeted_dp = dsa_to_port(targeted_ds, info->port); + cpu_dp = targeted_dp->cpu_dp; + + if (dsa_switch_is_upstream_of(dp->ds, targeted_ds)) + return dsa_port_is_dsa(dp) || dp == cpu_dp; + + return false; +} + +static struct dsa_vlan *dsa_vlan_find(struct list_head *vlan_list, + const struct switchdev_obj_port_vlan *vlan) +{ + struct dsa_vlan *v; + + list_for_each_entry(v, vlan_list, list) + if (v->vid == vlan->vid) + return v; + + return NULL; +} + +static int dsa_port_do_vlan_add(struct dsa_port *dp, + const struct switchdev_obj_port_vlan *vlan, + struct netlink_ext_ack *extack) +{ + struct dsa_switch *ds = dp->ds; + int port = dp->index; + struct dsa_vlan *v; + int err = 0; + + /* No need to bother with refcounting for user ports. */ + if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp))) + return ds->ops->port_vlan_add(ds, port, vlan, extack); + + /* No need to propagate on shared ports the existing VLANs that were + * re-notified after just the flags have changed. This would cause a + * refcount bump which we need to avoid, since it unbalances the + * additions with the deletions. + */ + if (vlan->changed) + return 0; + + mutex_lock(&dp->vlans_lock); + + v = dsa_vlan_find(&dp->vlans, vlan); + if (v) { + refcount_inc(&v->refcount); + goto out; + } + + v = kzalloc(sizeof(*v), GFP_KERNEL); + if (!v) { + err = -ENOMEM; + goto out; + } + + err = ds->ops->port_vlan_add(ds, port, vlan, extack); + if (err) { + kfree(v); + goto out; + } + + v->vid = vlan->vid; + refcount_set(&v->refcount, 1); + list_add_tail(&v->list, &dp->vlans); + +out: + mutex_unlock(&dp->vlans_lock); + + return err; +} + +static int dsa_port_do_vlan_del(struct dsa_port *dp, + const struct switchdev_obj_port_vlan *vlan) +{ + struct dsa_switch *ds = dp->ds; + int port = dp->index; + struct dsa_vlan *v; + int err = 0; + + /* No need to bother with refcounting for user ports */ + if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp))) + return ds->ops->port_vlan_del(ds, port, vlan); + + mutex_lock(&dp->vlans_lock); + + v = dsa_vlan_find(&dp->vlans, vlan); + if (!v) { + err = -ENOENT; + goto out; + } + + if (!refcount_dec_and_test(&v->refcount)) + goto out; + + err = ds->ops->port_vlan_del(ds, port, vlan); + if (err) { + refcount_set(&v->refcount, 1); + goto out; + } + + list_del(&v->list); + kfree(v); + +out: + mutex_unlock(&dp->vlans_lock); + + return err; +} + static int dsa_switch_vlan_add(struct dsa_switch *ds, struct dsa_notifier_vlan_info *info) { @@ -581,8 +702,8 @@ static int dsa_switch_vlan_add(struct dsa_switch *ds, dsa_switch_for_each_port(dp, ds) { if (dsa_port_vlan_match(dp, info)) { - err = ds->ops->port_vlan_add(ds, dp->index, info->vlan, - info->extack); + err = dsa_port_do_vlan_add(dp, info->vlan, + info->extack); if (err) return err; } @@ -594,15 +715,61 @@ static int dsa_switch_vlan_add(struct dsa_switch *ds, static int dsa_switch_vlan_del(struct dsa_switch *ds, struct dsa_notifier_vlan_info *info) { + struct dsa_port *dp; + int err; + if (!ds->ops->port_vlan_del) return -EOPNOTSUPP; - if (ds->index == info->sw_index) - return ds->ops->port_vlan_del(ds, info->port, info->vlan); + dsa_switch_for_each_port(dp, ds) { + if (dsa_port_vlan_match(dp, info)) { + err = dsa_port_do_vlan_del(dp, info->vlan); + if (err) + return err; + } + } + + return 0; +} + +static int dsa_switch_host_vlan_add(struct dsa_switch *ds, + struct dsa_notifier_vlan_info *info) +{ + struct dsa_port *dp; + int err; + + if (!ds->ops->port_vlan_add) + return -EOPNOTSUPP; + + dsa_switch_for_each_port(dp, ds) { + if (dsa_port_host_vlan_match(dp, info)) { + err = dsa_port_do_vlan_add(dp, info->vlan, + info->extack); + if (err) + return err; + } + } + + return 0; +} + +static int dsa_switch_host_vlan_del(struct dsa_switch *ds, + struct dsa_notifier_vlan_info *info) +{ + struct dsa_port *dp; + int err; + + if (!ds->ops->port_vlan_del) + return -EOPNOTSUPP; + + dsa_switch_for_each_port(dp, ds) { + if (dsa_port_host_vlan_match(dp, info)) { + err = dsa_port_do_vlan_del(dp, info->vlan); + if (err) + return err; + } + } - /* Do not deprogram the DSA links as they may be used as conduit - * for other VLAN members in the fabric. - */ return 0; } @@ -764,6 +931,12 @@ static int dsa_switch_event(struct notifier_block *nb, case DSA_NOTIFIER_VLAN_DEL: err = dsa_switch_vlan_del(ds, info); break; + case DSA_NOTIFIER_HOST_VLAN_ADD: + err = dsa_switch_host_vlan_add(ds, info); + break; + case DSA_NOTIFIER_HOST_VLAN_DEL: + err = dsa_switch_host_vlan_del(ds, info); + break; case DSA_NOTIFIER_MTU: err = dsa_switch_mtu(ds, info); break; diff --git a/net/switchdev/switchdev.c b/net/switchdev/switchdev.c index 12e6b4146bfb..6a00c390547b 100644 --- a/net/switchdev/switchdev.c +++ b/net/switchdev/switchdev.c @@ -409,6 +409,27 @@ static int switchdev_lower_dev_walk(struct net_device *lower_dev, } static struct net_device * +switchdev_lower_dev_find_rcu(struct net_device *dev, + bool (*check_cb)(const struct net_device *dev), + bool (*foreign_dev_check_cb)(const struct net_device *dev, + const struct net_device *foreign_dev)) +{ + struct switchdev_nested_priv switchdev_priv = { + .check_cb = check_cb, + .foreign_dev_check_cb = foreign_dev_check_cb, + .dev = dev, + .lower_dev = NULL, + }; + struct netdev_nested_priv priv = { + .data = &switchdev_priv, + }; + + netdev_walk_all_lower_dev_rcu(dev, switchdev_lower_dev_walk, &priv); + + return switchdev_priv.lower_dev; +} + +static struct net_device * switchdev_lower_dev_find(struct net_device *dev, bool (*check_cb)(const struct net_device *dev), bool (*foreign_dev_check_cb)(const struct net_device *dev, @@ -424,7 +445,7 @@ switchdev_lower_dev_find(struct net_device *dev, .data = &switchdev_priv, }; - netdev_walk_all_lower_dev_rcu(dev, switchdev_lower_dev_walk, &priv); + netdev_walk_all_lower_dev(dev, switchdev_lower_dev_walk, &priv); return switchdev_priv.lower_dev; } @@ -451,7 +472,7 @@ static int __switchdev_handle_fdb_event_to_device(struct net_device *dev, return mod_cb(dev, orig_dev, event, info->ctx, fdb_info); if (netif_is_lag_master(dev)) { - if (!switchdev_lower_dev_find(dev, check_cb, foreign_dev_check_cb)) + if (!switchdev_lower_dev_find_rcu(dev, check_cb, foreign_dev_check_cb)) goto maybe_bridged_with_us; /* This is a LAG interface that we offload */ @@ -465,7 +486,7 @@ static int __switchdev_handle_fdb_event_to_device(struct net_device *dev, * towards a bridge device. */ if (netif_is_bridge_master(dev)) { - if (!switchdev_lower_dev_find(dev, check_cb, foreign_dev_check_cb)) + if (!switchdev_lower_dev_find_rcu(dev, check_cb, foreign_dev_check_cb)) return 0; /* This is a bridge interface that we offload */ @@ -478,8 +499,8 @@ static int __switchdev_handle_fdb_event_to_device(struct net_device *dev, * that we offload. */ if (!check_cb(lower_dev) && - !switchdev_lower_dev_find(lower_dev, check_cb, - foreign_dev_check_cb)) + !switchdev_lower_dev_find_rcu(lower_dev, check_cb, + foreign_dev_check_cb)) continue; err = __switchdev_handle_fdb_event_to_device(lower_dev, orig_dev, @@ -501,7 +522,7 @@ maybe_bridged_with_us: if (!br || !netif_is_bridge_master(br)) return 0; - if (!switchdev_lower_dev_find(br, check_cb, foreign_dev_check_cb)) + if (!switchdev_lower_dev_find_rcu(br, check_cb, foreign_dev_check_cb)) return 0; return __switchdev_handle_fdb_event_to_device(br, orig_dev, event, fdb_info, @@ -536,13 +557,15 @@ EXPORT_SYMBOL_GPL(switchdev_handle_fdb_event_to_device); static int __switchdev_handle_port_obj_add(struct net_device *dev, struct switchdev_notifier_port_obj_info *port_obj_info, bool (*check_cb)(const struct net_device *dev), + bool (*foreign_dev_check_cb)(const struct net_device *dev, + const struct net_device *foreign_dev), int (*add_cb)(struct net_device *dev, const void *ctx, const struct switchdev_obj *obj, struct netlink_ext_ack *extack)) { struct switchdev_notifier_info *info = &port_obj_info->info; + struct net_device *br, *lower_dev; struct netlink_ext_ack *extack; - struct net_device *lower_dev; struct list_head *iter; int err = -EOPNOTSUPP; @@ -566,15 +589,42 @@ static int __switchdev_handle_port_obj_add(struct net_device *dev, if (netif_is_bridge_master(lower_dev)) continue; + /* When searching for switchdev interfaces that are neighbors + * of foreign ones, and @dev is a bridge, do not recurse on the + * foreign interface again, it was already visited. + */ + if (foreign_dev_check_cb && !check_cb(lower_dev) && + !switchdev_lower_dev_find(lower_dev, check_cb, foreign_dev_check_cb)) + continue; + err = __switchdev_handle_port_obj_add(lower_dev, port_obj_info, - check_cb, add_cb); + check_cb, foreign_dev_check_cb, + add_cb); if (err && err != -EOPNOTSUPP) return err; } - return err; + /* Event is neither on a bridge nor a LAG. Check whether it is on an + * interface that is in a bridge with us. + */ + if (!foreign_dev_check_cb) + return err; + + br = netdev_master_upper_dev_get(dev); + if (!br || !netif_is_bridge_master(br)) + return err; + + if (!switchdev_lower_dev_find(br, check_cb, foreign_dev_check_cb)) + return err; + + return __switchdev_handle_port_obj_add(br, port_obj_info, check_cb, + foreign_dev_check_cb, add_cb); } +/* Pass through a port object addition, if @dev passes @check_cb, or replicate + * it towards all lower interfaces of @dev that pass @check_cb, if @dev is a + * bridge or a LAG. + */ int switchdev_handle_port_obj_add(struct net_device *dev, struct switchdev_notifier_port_obj_info *port_obj_info, bool (*check_cb)(const struct net_device *dev), @@ -585,21 +635,46 @@ int switchdev_handle_port_obj_add(struct net_device *dev, int err; err = __switchdev_handle_port_obj_add(dev, port_obj_info, check_cb, - add_cb); + NULL, add_cb); if (err == -EOPNOTSUPP) err = 0; return err; } EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_add); +/* Same as switchdev_handle_port_obj_add(), except if object is notified on a + * @dev that passes @foreign_dev_check_cb, it is replicated towards all devices + * that pass @check_cb and are in the same bridge as @dev. + */ +int switchdev_handle_port_obj_add_foreign(struct net_device *dev, + struct switchdev_notifier_port_obj_info *port_obj_info, + bool (*check_cb)(const struct net_device *dev), + bool (*foreign_dev_check_cb)(const struct net_device *dev, + const struct net_device *foreign_dev), + int (*add_cb)(struct net_device *dev, const void *ctx, + const struct switchdev_obj *obj, + struct netlink_ext_ack *extack)) +{ + int err; + + err = __switchdev_handle_port_obj_add(dev, port_obj_info, check_cb, + foreign_dev_check_cb, add_cb); + if (err == -EOPNOTSUPP) + err = 0; + return err; +} +EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_add_foreign); + static int __switchdev_handle_port_obj_del(struct net_device *dev, struct switchdev_notifier_port_obj_info *port_obj_info, bool (*check_cb)(const struct net_device *dev), + bool (*foreign_dev_check_cb)(const struct net_device *dev, + const struct net_device *foreign_dev), int (*del_cb)(struct net_device *dev, const void *ctx, const struct switchdev_obj *obj)) { struct switchdev_notifier_info *info = &port_obj_info->info; - struct net_device *lower_dev; + struct net_device *br, *lower_dev; struct list_head *iter; int err = -EOPNOTSUPP; @@ -621,15 +696,42 @@ static int __switchdev_handle_port_obj_del(struct net_device *dev, if (netif_is_bridge_master(lower_dev)) continue; + /* When searching for switchdev interfaces that are neighbors + * of foreign ones, and @dev is a bridge, do not recurse on the + * foreign interface again, it was already visited. + */ + if (foreign_dev_check_cb && !check_cb(lower_dev) && + !switchdev_lower_dev_find(lower_dev, check_cb, foreign_dev_check_cb)) + continue; + err = __switchdev_handle_port_obj_del(lower_dev, port_obj_info, - check_cb, del_cb); + check_cb, foreign_dev_check_cb, + del_cb); if (err && err != -EOPNOTSUPP) return err; } - return err; + /* Event is neither on a bridge nor a LAG. Check whether it is on an + * interface that is in a bridge with us. + */ + if (!foreign_dev_check_cb) + return err; + + br = netdev_master_upper_dev_get(dev); + if (!br || !netif_is_bridge_master(br)) + return err; + + if (!switchdev_lower_dev_find(br, check_cb, foreign_dev_check_cb)) + return err; + + return __switchdev_handle_port_obj_del(br, port_obj_info, check_cb, + foreign_dev_check_cb, del_cb); } +/* Pass through a port object deletion, if @dev passes @check_cb, or replicate + * it towards all lower interfaces of @dev that pass @check_cb, if @dev is a + * bridge or a LAG. + */ int switchdev_handle_port_obj_del(struct net_device *dev, struct switchdev_notifier_port_obj_info *port_obj_info, bool (*check_cb)(const struct net_device *dev), @@ -639,13 +741,35 @@ int switchdev_handle_port_obj_del(struct net_device *dev, int err; err = __switchdev_handle_port_obj_del(dev, port_obj_info, check_cb, - del_cb); + NULL, del_cb); if (err == -EOPNOTSUPP) err = 0; return err; } EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_del); +/* Same as switchdev_handle_port_obj_del(), except if object is notified on a + * @dev that passes @foreign_dev_check_cb, it is replicated towards all devices + * that pass @check_cb and are in the same bridge as @dev. + */ +int switchdev_handle_port_obj_del_foreign(struct net_device *dev, + struct switchdev_notifier_port_obj_info *port_obj_info, + bool (*check_cb)(const struct net_device *dev), + bool (*foreign_dev_check_cb)(const struct net_device *dev, + const struct net_device *foreign_dev), + int (*del_cb)(struct net_device *dev, const void *ctx, + const struct switchdev_obj *obj)) +{ + int err; + + err = __switchdev_handle_port_obj_del(dev, port_obj_info, check_cb, + foreign_dev_check_cb, del_cb); + if (err == -EOPNOTSUPP) + err = 0; + return err; +} +EXPORT_SYMBOL_GPL(switchdev_handle_port_obj_del_foreign); + static int __switchdev_handle_port_attr_set(struct net_device *dev, struct switchdev_notifier_port_attr_info *port_attr_info, bool (*check_cb)(const struct net_device *dev), |