| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* |
| * Handling of a single switch chip, part of a switch fabric |
| * |
| * Copyright (c) 2017 Savoir-faire Linux Inc. |
| * Vivien Didelot <vivien.didelot@savoirfairelinux.com> |
| */ |
| |
| #include <linux/if_bridge.h> |
| #include <linux/netdevice.h> |
| #include <linux/notifier.h> |
| #include <linux/if_vlan.h> |
| #include <net/switchdev.h> |
| |
| #include "dsa_priv.h" |
| |
| static unsigned int dsa_switch_fastest_ageing_time(struct dsa_switch *ds, |
| unsigned int ageing_time) |
| { |
| struct dsa_port *dp; |
| |
| dsa_switch_for_each_port(dp, ds) |
| if (dp->ageing_time && dp->ageing_time < ageing_time) |
| ageing_time = dp->ageing_time; |
| |
| return ageing_time; |
| } |
| |
| static int dsa_switch_ageing_time(struct dsa_switch *ds, |
| struct dsa_notifier_ageing_time_info *info) |
| { |
| unsigned int ageing_time = info->ageing_time; |
| |
| if (ds->ageing_time_min && ageing_time < ds->ageing_time_min) |
| return -ERANGE; |
| |
| if (ds->ageing_time_max && ageing_time > ds->ageing_time_max) |
| return -ERANGE; |
| |
| /* Program the fastest ageing time in case of multiple bridges */ |
| ageing_time = dsa_switch_fastest_ageing_time(ds, ageing_time); |
| |
| if (ds->ops->set_ageing_time) |
| return ds->ops->set_ageing_time(ds, ageing_time); |
| |
| return 0; |
| } |
| |
| static bool dsa_port_mtu_match(struct dsa_port *dp, |
| struct dsa_notifier_mtu_info *info) |
| { |
| if (dp->ds->index == info->sw_index && dp->index == info->port) |
| return true; |
| |
| /* Do not propagate to other switches in the tree if the notifier was |
| * targeted for a single switch. |
| */ |
| if (info->targeted_match) |
| return false; |
| |
| if (dsa_port_is_dsa(dp) || dsa_port_is_cpu(dp)) |
| return true; |
| |
| return false; |
| } |
| |
| static int dsa_switch_mtu(struct dsa_switch *ds, |
| struct dsa_notifier_mtu_info *info) |
| { |
| struct dsa_port *dp; |
| int ret; |
| |
| if (!ds->ops->port_change_mtu) |
| return -EOPNOTSUPP; |
| |
| dsa_switch_for_each_port(dp, ds) { |
| if (dsa_port_mtu_match(dp, info)) { |
| ret = ds->ops->port_change_mtu(ds, dp->index, |
| info->mtu); |
| if (ret) |
| return ret; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int dsa_switch_bridge_join(struct dsa_switch *ds, |
| struct dsa_notifier_bridge_info *info) |
| { |
| struct dsa_switch_tree *dst = ds->dst; |
| int err; |
| |
| if (dst->index == info->tree_index && ds->index == info->sw_index) { |
| if (!ds->ops->port_bridge_join) |
| return -EOPNOTSUPP; |
| |
| err = ds->ops->port_bridge_join(ds, info->port, info->bridge, |
| &info->tx_fwd_offload, |
| info->extack); |
| if (err) |
| return err; |
| } |
| |
| if ((dst->index != info->tree_index || ds->index != info->sw_index) && |
| ds->ops->crosschip_bridge_join) { |
| err = ds->ops->crosschip_bridge_join(ds, info->tree_index, |
| info->sw_index, |
| info->port, info->bridge, |
| info->extack); |
| if (err) |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static int dsa_switch_sync_vlan_filtering(struct dsa_switch *ds, |
| struct dsa_notifier_bridge_info *info) |
| { |
| struct netlink_ext_ack extack = {0}; |
| bool change_vlan_filtering = false; |
| bool vlan_filtering; |
| struct dsa_port *dp; |
| int err; |
| |
| if (ds->needs_standalone_vlan_filtering && |
| !br_vlan_enabled(info->bridge.dev)) { |
| change_vlan_filtering = true; |
| vlan_filtering = true; |
| } else if (!ds->needs_standalone_vlan_filtering && |
| br_vlan_enabled(info->bridge.dev)) { |
| change_vlan_filtering = true; |
| vlan_filtering = false; |
| } |
| |
| /* If the bridge was vlan_filtering, the bridge core doesn't trigger an |
| * event for changing vlan_filtering setting upon slave ports leaving |
| * it. That is a good thing, because that lets us handle it and also |
| * handle the case where the switch's vlan_filtering setting is global |
| * (not per port). When that happens, the correct moment to trigger the |
| * vlan_filtering callback is only when the last port leaves the last |
| * VLAN-aware bridge. |
| */ |
| if (change_vlan_filtering && ds->vlan_filtering_is_global) { |
| dsa_switch_for_each_port(dp, ds) { |
| struct net_device *br = dsa_port_bridge_dev_get(dp); |
| |
| if (br && br_vlan_enabled(br)) { |
| change_vlan_filtering = false; |
| break; |
| } |
| } |
| } |
| |
| if (change_vlan_filtering) { |
| err = dsa_port_vlan_filtering(dsa_to_port(ds, info->port), |
| vlan_filtering, &extack); |
| if (extack._msg) |
| dev_err(ds->dev, "port %d: %s\n", info->port, |
| extack._msg); |
| if (err && err != -EOPNOTSUPP) |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static int dsa_switch_bridge_leave(struct dsa_switch *ds, |
| struct dsa_notifier_bridge_info *info) |
| { |
| struct dsa_switch_tree *dst = ds->dst; |
| int err; |
| |
| if (dst->index == info->tree_index && ds->index == info->sw_index && |
| ds->ops->port_bridge_leave) |
| ds->ops->port_bridge_leave(ds, info->port, info->bridge); |
| |
| if ((dst->index != info->tree_index || ds->index != info->sw_index) && |
| ds->ops->crosschip_bridge_leave) |
| ds->ops->crosschip_bridge_leave(ds, info->tree_index, |
| info->sw_index, info->port, |
| info->bridge); |
| |
| if (ds->dst->index == info->tree_index && ds->index == info->sw_index) { |
| err = dsa_switch_sync_vlan_filtering(ds, info); |
| if (err) |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| /* Matches for all upstream-facing ports (the CPU port and all upstream-facing |
| * DSA links) that sit between the targeted port on which the notifier was |
| * emitted and its dedicated CPU port. |
| */ |
| static bool dsa_port_host_address_match(struct dsa_port *dp, |
| int info_sw_index, int info_port) |
| { |
| 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 dp->index == dsa_towards_port(dp->ds, cpu_dp->ds->index, |
| cpu_dp->index); |
| |
| return false; |
| } |
| |
| static bool dsa_db_equal(const struct dsa_db *a, const struct dsa_db *b) |
| { |
| if (a->type != b->type) |
| return false; |
| |
| switch (a->type) { |
| case DSA_DB_PORT: |
| return a->dp == b->dp; |
| case DSA_DB_LAG: |
| return a->lag.dev == b->lag.dev; |
| case DSA_DB_BRIDGE: |
| return a->bridge.num == b->bridge.num; |
| default: |
| WARN_ON(1); |
| return false; |
| } |
| } |
| |
| static struct dsa_mac_addr *dsa_mac_addr_find(struct list_head *addr_list, |
| const unsigned char *addr, u16 vid, |
| struct dsa_db db) |
| { |
| struct dsa_mac_addr *a; |
| |
| list_for_each_entry(a, addr_list, list) |
| if (ether_addr_equal(a->addr, addr) && a->vid == vid && |
| dsa_db_equal(&a->db, &db)) |
| return a; |
| |
| return NULL; |
| } |
| |
| static int dsa_port_do_mdb_add(struct dsa_port *dp, |
| const struct switchdev_obj_port_mdb *mdb, |
| struct dsa_db db) |
| { |
| struct dsa_switch *ds = dp->ds; |
| struct dsa_mac_addr *a; |
| int port = dp->index; |
| 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_mdb_add(ds, port, mdb, db); |
| |
| mutex_lock(&dp->addr_lists_lock); |
| |
| a = dsa_mac_addr_find(&dp->mdbs, mdb->addr, mdb->vid, db); |
| if (a) { |
| refcount_inc(&a->refcount); |
| goto out; |
| } |
| |
| a = kzalloc(sizeof(*a), GFP_KERNEL); |
| if (!a) { |
| err = -ENOMEM; |
| goto out; |
| } |
| |
| err = ds->ops->port_mdb_add(ds, port, mdb, db); |
| if (err) { |
| kfree(a); |
| goto out; |
| } |
| |
| ether_addr_copy(a->addr, mdb->addr); |
| a->vid = mdb->vid; |
| a->db = db; |
| refcount_set(&a->refcount, 1); |
| list_add_tail(&a->list, &dp->mdbs); |
| |
| out: |
| mutex_unlock(&dp->addr_lists_lock); |
| |
| return err; |
| } |
| |
| static int dsa_port_do_mdb_del(struct dsa_port *dp, |
| const struct switchdev_obj_port_mdb *mdb, |
| struct dsa_db db) |
| { |
| struct dsa_switch *ds = dp->ds; |
| struct dsa_mac_addr *a; |
| int port = dp->index; |
| 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_mdb_del(ds, port, mdb, db); |
| |
| mutex_lock(&dp->addr_lists_lock); |
| |
| a = dsa_mac_addr_find(&dp->mdbs, mdb->addr, mdb->vid, db); |
| if (!a) { |
| err = -ENOENT; |
| goto out; |
| } |
| |
| if (!refcount_dec_and_test(&a->refcount)) |
| goto out; |
| |
| err = ds->ops->port_mdb_del(ds, port, mdb, db); |
| if (err) { |
| refcount_set(&a->refcount, 1); |
| goto out; |
| } |
| |
| list_del(&a->list); |
| kfree(a); |
| |
| out: |
| mutex_unlock(&dp->addr_lists_lock); |
| |
| return err; |
| } |
| |
| static int dsa_port_do_fdb_add(struct dsa_port *dp, const unsigned char *addr, |
| u16 vid, struct dsa_db db) |
| { |
| struct dsa_switch *ds = dp->ds; |
| struct dsa_mac_addr *a; |
| int port = dp->index; |
| 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_fdb_add(ds, port, addr, vid, db); |
| |
| mutex_lock(&dp->addr_lists_lock); |
| |
| a = dsa_mac_addr_find(&dp->fdbs, addr, vid, db); |
| if (a) { |
| refcount_inc(&a->refcount); |
| goto out; |
| } |
| |
| a = kzalloc(sizeof(*a), GFP_KERNEL); |
| if (!a) { |
| err = -ENOMEM; |
| goto out; |
| } |
| |
| err = ds->ops->port_fdb_add(ds, port, addr, vid, db); |
| if (err) { |
| kfree(a); |
| goto out; |
| } |
| |
| ether_addr_copy(a->addr, addr); |
| a->vid = vid; |
| a->db = db; |
| refcount_set(&a->refcount, 1); |
| list_add_tail(&a->list, &dp->fdbs); |
| |
| out: |
| mutex_unlock(&dp->addr_lists_lock); |
| |
| return err; |
| } |
| |
| static int dsa_port_do_fdb_del(struct dsa_port *dp, const unsigned char *addr, |
| u16 vid, struct dsa_db db) |
| { |
| struct dsa_switch *ds = dp->ds; |
| struct dsa_mac_addr *a; |
| int port = dp->index; |
| 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_fdb_del(ds, port, addr, vid, db); |
| |
| mutex_lock(&dp->addr_lists_lock); |
| |
| a = dsa_mac_addr_find(&dp->fdbs, addr, vid, db); |
| if (!a) { |
| err = -ENOENT; |
| goto out; |
| } |
| |
| if (!refcount_dec_and_test(&a->refcount)) |
| goto out; |
| |
| err = ds->ops->port_fdb_del(ds, port, addr, vid, db); |
| if (err) { |
| refcount_set(&a->refcount, 1); |
| goto out; |
| } |
| |
| list_del(&a->list); |
| kfree(a); |
| |
| out: |
| mutex_unlock(&dp->addr_lists_lock); |
| |
| return err; |
| } |
| |
| static int dsa_switch_do_lag_fdb_add(struct dsa_switch *ds, struct dsa_lag *lag, |
| const unsigned char *addr, u16 vid, |
| struct dsa_db db) |
| { |
| struct dsa_mac_addr *a; |
| int err = 0; |
| |
| mutex_lock(&lag->fdb_lock); |
| |
| a = dsa_mac_addr_find(&lag->fdbs, addr, vid, db); |
| if (a) { |
| refcount_inc(&a->refcount); |
| goto out; |
| } |
| |
| a = kzalloc(sizeof(*a), GFP_KERNEL); |
| if (!a) { |
| err = -ENOMEM; |
| goto out; |
| } |
| |
| err = ds->ops->lag_fdb_add(ds, *lag, addr, vid, db); |
| if (err) { |
| kfree(a); |
| goto out; |
| } |
| |
| ether_addr_copy(a->addr, addr); |
| a->vid = vid; |
| refcount_set(&a->refcount, 1); |
| list_add_tail(&a->list, &lag->fdbs); |
| |
| out: |
| mutex_unlock(&lag->fdb_lock); |
| |
| return err; |
| } |
| |
| static int dsa_switch_do_lag_fdb_del(struct dsa_switch *ds, struct dsa_lag *lag, |
| const unsigned char *addr, u16 vid, |
| struct dsa_db db) |
| { |
| struct dsa_mac_addr *a; |
| int err = 0; |
| |
| mutex_lock(&lag->fdb_lock); |
| |
| a = dsa_mac_addr_find(&lag->fdbs, addr, vid, db); |
| if (!a) { |
| err = -ENOENT; |
| goto out; |
| } |
| |
| if (!refcount_dec_and_test(&a->refcount)) |
| goto out; |
| |
| err = ds->ops->lag_fdb_del(ds, *lag, addr, vid, db); |
| if (err) { |
| refcount_set(&a->refcount, 1); |
| goto out; |
| } |
| |
| list_del(&a->list); |
| kfree(a); |
| |
| out: |
| mutex_unlock(&lag->fdb_lock); |
| |
| return err; |
| } |
| |
| static int dsa_switch_host_fdb_add(struct dsa_switch *ds, |
| struct dsa_notifier_fdb_info *info) |
| { |
| struct dsa_port *dp; |
| int err = 0; |
| |
| if (!ds->ops->port_fdb_add) |
| return -EOPNOTSUPP; |
| |
| dsa_switch_for_each_port(dp, ds) { |
| if (dsa_port_host_address_match(dp, info->sw_index, |
| info->port)) { |
| err = dsa_port_do_fdb_add(dp, info->addr, info->vid, |
| info->db); |
| if (err) |
| break; |
| } |
| } |
| |
| return err; |
| } |
| |
| static int dsa_switch_host_fdb_del(struct dsa_switch *ds, |
| struct dsa_notifier_fdb_info *info) |
| { |
| struct dsa_port *dp; |
| int err = 0; |
| |
| if (!ds->ops->port_fdb_del) |
| return -EOPNOTSUPP; |
| |
| dsa_switch_for_each_port(dp, ds) { |
| if (dsa_port_host_address_match(dp, info->sw_index, |
| info->port)) { |
| err = dsa_port_do_fdb_del(dp, info->addr, info->vid, |
| info->db); |
| if (err) |
| break; |
| } |
| } |
| |
| return err; |
| } |
| |
| static int dsa_switch_fdb_add(struct dsa_switch *ds, |
| struct dsa_notifier_fdb_info *info) |
| { |
| int port = dsa_towards_port(ds, info->sw_index, info->port); |
| struct dsa_port *dp = dsa_to_port(ds, port); |
| |
| if (!ds->ops->port_fdb_add) |
| return -EOPNOTSUPP; |
| |
| return dsa_port_do_fdb_add(dp, info->addr, info->vid, info->db); |
| } |
| |
| static int dsa_switch_fdb_del(struct dsa_switch *ds, |
| struct dsa_notifier_fdb_info *info) |
| { |
| int port = dsa_towards_port(ds, info->sw_index, info->port); |
| struct dsa_port *dp = dsa_to_port(ds, port); |
| |
| if (!ds->ops->port_fdb_del) |
| return -EOPNOTSUPP; |
| |
| return dsa_port_do_fdb_del(dp, info->addr, info->vid, info->db); |
| } |
| |
| static int dsa_switch_lag_fdb_add(struct dsa_switch *ds, |
| struct dsa_notifier_lag_fdb_info *info) |
| { |
| struct dsa_port *dp; |
| |
| if (!ds->ops->lag_fdb_add) |
| return -EOPNOTSUPP; |
| |
| /* Notify switch only if it has a port in this LAG */ |
| dsa_switch_for_each_port(dp, ds) |
| if (dsa_port_offloads_lag(dp, info->lag)) |
| return dsa_switch_do_lag_fdb_add(ds, info->lag, |
| info->addr, info->vid, |
| info->db); |
| |
| return 0; |
| } |
| |
| static int dsa_switch_lag_fdb_del(struct dsa_switch *ds, |
| struct dsa_notifier_lag_fdb_info *info) |
| { |
| struct dsa_port *dp; |
| |
| if (!ds->ops->lag_fdb_del) |
| return -EOPNOTSUPP; |
| |
| /* Notify switch only if it has a port in this LAG */ |
| dsa_switch_for_each_port(dp, ds) |
| if (dsa_port_offloads_lag(dp, info->lag)) |
| return dsa_switch_do_lag_fdb_del(ds, info->lag, |
| info->addr, info->vid, |
| info->db); |
| |
| return 0; |
| } |
| |
| static int dsa_switch_lag_change(struct dsa_switch *ds, |
| struct dsa_notifier_lag_info *info) |
| { |
| if (ds->index == info->sw_index && ds->ops->port_lag_change) |
| return ds->ops->port_lag_change(ds, info->port); |
| |
| if (ds->index != info->sw_index && ds->ops->crosschip_lag_change) |
| return ds->ops->crosschip_lag_change(ds, info->sw_index, |
| info->port); |
| |
| return 0; |
| } |
| |
| static int dsa_switch_lag_join(struct dsa_switch *ds, |
| struct dsa_notifier_lag_info *info) |
| { |
| if (ds->index == info->sw_index && ds->ops->port_lag_join) |
| return ds->ops->port_lag_join(ds, info->port, info->lag, |
| info->info); |
| |
| if (ds->index != info->sw_index && ds->ops->crosschip_lag_join) |
| return ds->ops->crosschip_lag_join(ds, info->sw_index, |
| info->port, info->lag, |
| info->info); |
| |
| return -EOPNOTSUPP; |
| } |
| |
| static int dsa_switch_lag_leave(struct dsa_switch *ds, |
| struct dsa_notifier_lag_info *info) |
| { |
| if (ds->index == info->sw_index && ds->ops->port_lag_leave) |
| return ds->ops->port_lag_leave(ds, info->port, info->lag); |
| |
| if (ds->index != info->sw_index && ds->ops->crosschip_lag_leave) |
| return ds->ops->crosschip_lag_leave(ds, info->sw_index, |
| info->port, info->lag); |
| |
| return -EOPNOTSUPP; |
| } |
| |
| static int dsa_switch_mdb_add(struct dsa_switch *ds, |
| struct dsa_notifier_mdb_info *info) |
| { |
| int port = dsa_towards_port(ds, info->sw_index, info->port); |
| struct dsa_port *dp = dsa_to_port(ds, port); |
| |
| if (!ds->ops->port_mdb_add) |
| return -EOPNOTSUPP; |
| |
| return dsa_port_do_mdb_add(dp, info->mdb, info->db); |
| } |
| |
| static int dsa_switch_mdb_del(struct dsa_switch *ds, |
| struct dsa_notifier_mdb_info *info) |
| { |
| int port = dsa_towards_port(ds, info->sw_index, info->port); |
| struct dsa_port *dp = dsa_to_port(ds, port); |
| |
| if (!ds->ops->port_mdb_del) |
| return -EOPNOTSUPP; |
| |
| return dsa_port_do_mdb_del(dp, info->mdb, info->db); |
| } |
| |
| static int dsa_switch_host_mdb_add(struct dsa_switch *ds, |
| struct dsa_notifier_mdb_info *info) |
| { |
| struct dsa_port *dp; |
| int err = 0; |
| |
| if (!ds->ops->port_mdb_add) |
| return -EOPNOTSUPP; |
| |
| dsa_switch_for_each_port(dp, ds) { |
| if (dsa_port_host_address_match(dp, info->sw_index, |
| info->port)) { |
| err = dsa_port_do_mdb_add(dp, info->mdb, info->db); |
| if (err) |
| break; |
| } |
| } |
| |
| return err; |
| } |
| |
| static int dsa_switch_host_mdb_del(struct dsa_switch *ds, |
| struct dsa_notifier_mdb_info *info) |
| { |
| struct dsa_port *dp; |
| int err = 0; |
| |
| if (!ds->ops->port_mdb_del) |
| return -EOPNOTSUPP; |
| |
| dsa_switch_for_each_port(dp, ds) { |
| if (dsa_port_host_address_match(dp, info->sw_index, |
| info->port)) { |
| err = dsa_port_do_mdb_del(dp, info->mdb, info->db); |
| if (err) |
| break; |
| } |
| } |
| |
| 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) |
| { |
| if (dp->ds->index == info->sw_index && dp->index == info->port) |
| return true; |
| |
| if (dsa_port_is_dsa(dp)) |
| return true; |
| |
| 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) |
| { |
| struct dsa_port *dp; |
| int err; |
| |
| if (!ds->ops->port_vlan_add) |
| return -EOPNOTSUPP; |
| |
| dsa_switch_for_each_port(dp, ds) { |
| if (dsa_port_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_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_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; |
| } |
| } |
| |
| return 0; |
| } |
| |
| static int dsa_switch_change_tag_proto(struct dsa_switch *ds, |
| struct dsa_notifier_tag_proto_info *info) |
| { |
| const struct dsa_device_ops *tag_ops = info->tag_ops; |
| struct dsa_port *dp, *cpu_dp; |
| int err; |
| |
| if (!ds->ops->change_tag_protocol) |
| return -EOPNOTSUPP; |
| |
| ASSERT_RTNL(); |
| |
| dsa_switch_for_each_cpu_port(cpu_dp, ds) { |
| err = ds->ops->change_tag_protocol(ds, cpu_dp->index, |
| tag_ops->proto); |
| if (err) |
| return err; |
| |
| dsa_port_set_tag_protocol(cpu_dp, tag_ops); |
| } |
| |
| /* Now that changing the tag protocol can no longer fail, let's update |
| * the remaining bits which are "duplicated for faster access", and the |
| * bits that depend on the tagger, such as the MTU. |
| */ |
| dsa_switch_for_each_user_port(dp, ds) { |
| struct net_device *slave = dp->slave; |
| |
| dsa_slave_setup_tagger(slave); |
| |
| /* rtnl_mutex is held in dsa_tree_change_tag_proto */ |
| dsa_slave_change_mtu(slave, slave->mtu); |
| } |
| |
| return 0; |
| } |
| |
| /* We use the same cross-chip notifiers to inform both the tagger side, as well |
| * as the switch side, of connection and disconnection events. |
| * Since ds->tagger_data is owned by the tagger, it isn't a hard error if the |
| * switch side doesn't support connecting to this tagger, and therefore, the |
| * fact that we don't disconnect the tagger side doesn't constitute a memory |
| * leak: the tagger will still operate with persistent per-switch memory, just |
| * with the switch side unconnected to it. What does constitute a hard error is |
| * when the switch side supports connecting but fails. |
| */ |
| static int |
| dsa_switch_connect_tag_proto(struct dsa_switch *ds, |
| struct dsa_notifier_tag_proto_info *info) |
| { |
| const struct dsa_device_ops *tag_ops = info->tag_ops; |
| int err; |
| |
| /* Notify the new tagger about the connection to this switch */ |
| if (tag_ops->connect) { |
| err = tag_ops->connect(ds); |
| if (err) |
| return err; |
| } |
| |
| if (!ds->ops->connect_tag_protocol) |
| return -EOPNOTSUPP; |
| |
| /* Notify the switch about the connection to the new tagger */ |
| err = ds->ops->connect_tag_protocol(ds, tag_ops->proto); |
| if (err) { |
| /* Revert the new tagger's connection to this tree */ |
| if (tag_ops->disconnect) |
| tag_ops->disconnect(ds); |
| return err; |
| } |
| |
| return 0; |
| } |
| |
| static int |
| dsa_switch_disconnect_tag_proto(struct dsa_switch *ds, |
| struct dsa_notifier_tag_proto_info *info) |
| { |
| const struct dsa_device_ops *tag_ops = info->tag_ops; |
| |
| /* Notify the tagger about the disconnection from this switch */ |
| if (tag_ops->disconnect && ds->tagger_data) |
| tag_ops->disconnect(ds); |
| |
| /* No need to notify the switch, since it shouldn't have any |
| * resources to tear down |
| */ |
| return 0; |
| } |
| |
| static int |
| dsa_switch_master_state_change(struct dsa_switch *ds, |
| struct dsa_notifier_master_state_info *info) |
| { |
| if (!ds->ops->master_state_change) |
| return 0; |
| |
| ds->ops->master_state_change(ds, info->master, info->operational); |
| |
| return 0; |
| } |
| |
| static int dsa_switch_event(struct notifier_block *nb, |
| unsigned long event, void *info) |
| { |
| struct dsa_switch *ds = container_of(nb, struct dsa_switch, nb); |
| int err; |
| |
| switch (event) { |
| case DSA_NOTIFIER_AGEING_TIME: |
| err = dsa_switch_ageing_time(ds, info); |
| break; |
| case DSA_NOTIFIER_BRIDGE_JOIN: |
| err = dsa_switch_bridge_join(ds, info); |
| break; |
| 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; |
| case DSA_NOTIFIER_HOST_FDB_ADD: |
| err = dsa_switch_host_fdb_add(ds, info); |
| break; |
| case DSA_NOTIFIER_HOST_FDB_DEL: |
| err = dsa_switch_host_fdb_del(ds, info); |
| break; |
| case DSA_NOTIFIER_LAG_FDB_ADD: |
| err = dsa_switch_lag_fdb_add(ds, info); |
| break; |
| case DSA_NOTIFIER_LAG_FDB_DEL: |
| err = dsa_switch_lag_fdb_del(ds, info); |
| break; |
| case DSA_NOTIFIER_LAG_CHANGE: |
| err = dsa_switch_lag_change(ds, info); |
| break; |
| case DSA_NOTIFIER_LAG_JOIN: |
| err = dsa_switch_lag_join(ds, info); |
| break; |
| case DSA_NOTIFIER_LAG_LEAVE: |
| err = dsa_switch_lag_leave(ds, info); |
| break; |
| case DSA_NOTIFIER_MDB_ADD: |
| err = dsa_switch_mdb_add(ds, info); |
| break; |
| case DSA_NOTIFIER_MDB_DEL: |
| err = dsa_switch_mdb_del(ds, info); |
| break; |
| case DSA_NOTIFIER_HOST_MDB_ADD: |
| err = dsa_switch_host_mdb_add(ds, info); |
| break; |
| case DSA_NOTIFIER_HOST_MDB_DEL: |
| err = dsa_switch_host_mdb_del(ds, info); |
| break; |
| case DSA_NOTIFIER_VLAN_ADD: |
| err = dsa_switch_vlan_add(ds, info); |
| break; |
| 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; |
| case DSA_NOTIFIER_TAG_PROTO: |
| err = dsa_switch_change_tag_proto(ds, info); |
| break; |
| case DSA_NOTIFIER_TAG_PROTO_CONNECT: |
| err = dsa_switch_connect_tag_proto(ds, info); |
| break; |
| case DSA_NOTIFIER_TAG_PROTO_DISCONNECT: |
| err = dsa_switch_disconnect_tag_proto(ds, info); |
| break; |
| case DSA_NOTIFIER_TAG_8021Q_VLAN_ADD: |
| err = dsa_switch_tag_8021q_vlan_add(ds, info); |
| break; |
| case DSA_NOTIFIER_TAG_8021Q_VLAN_DEL: |
| err = dsa_switch_tag_8021q_vlan_del(ds, info); |
| break; |
| case DSA_NOTIFIER_MASTER_STATE_CHANGE: |
| err = dsa_switch_master_state_change(ds, info); |
| break; |
| default: |
| err = -EOPNOTSUPP; |
| break; |
| } |
| |
| if (err) |
| dev_dbg(ds->dev, "breaking chain for DSA event %lu (%d)\n", |
| event, err); |
| |
| return notifier_from_errno(err); |
| } |
| |
| int dsa_switch_register_notifier(struct dsa_switch *ds) |
| { |
| ds->nb.notifier_call = dsa_switch_event; |
| |
| return raw_notifier_chain_register(&ds->dst->nh, &ds->nb); |
| } |
| |
| void dsa_switch_unregister_notifier(struct dsa_switch *ds) |
| { |
| int err; |
| |
| err = raw_notifier_chain_unregister(&ds->dst->nh, &ds->nb); |
| if (err) |
| dev_err(ds->dev, "failed to unregister notifier (%d)\n", err); |
| } |