1082 lines
25 KiB
C
1082 lines
25 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Handling of a single switch chip, part of a switch fabric
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*
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* Copyright (c) 2017 Savoir-faire Linux Inc.
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* Vivien Didelot <vivien.didelot@savoirfairelinux.com>
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*/
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#include <linux/if_bridge.h>
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#include <linux/netdevice.h>
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#include <linux/notifier.h>
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#include <linux/if_vlan.h>
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#include <net/switchdev.h>
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#include "dsa.h"
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#include "netlink.h"
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#include "port.h"
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#include "slave.h"
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#include "switch.h"
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#include "tag_8021q.h"
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static unsigned int dsa_switch_fastest_ageing_time(struct dsa_switch *ds,
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unsigned int ageing_time)
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{
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struct dsa_port *dp;
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dsa_switch_for_each_port(dp, ds)
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if (dp->ageing_time && dp->ageing_time < ageing_time)
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ageing_time = dp->ageing_time;
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return ageing_time;
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}
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static int dsa_switch_ageing_time(struct dsa_switch *ds,
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struct dsa_notifier_ageing_time_info *info)
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{
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unsigned int ageing_time = info->ageing_time;
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if (ds->ageing_time_min && ageing_time < ds->ageing_time_min)
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return -ERANGE;
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if (ds->ageing_time_max && ageing_time > ds->ageing_time_max)
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return -ERANGE;
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/* Program the fastest ageing time in case of multiple bridges */
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ageing_time = dsa_switch_fastest_ageing_time(ds, ageing_time);
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if (ds->ops->set_ageing_time)
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return ds->ops->set_ageing_time(ds, ageing_time);
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return 0;
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}
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static bool dsa_port_mtu_match(struct dsa_port *dp,
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struct dsa_notifier_mtu_info *info)
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{
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return dp == info->dp || dsa_port_is_dsa(dp) || dsa_port_is_cpu(dp);
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}
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static int dsa_switch_mtu(struct dsa_switch *ds,
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struct dsa_notifier_mtu_info *info)
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{
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struct dsa_port *dp;
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int ret;
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if (!ds->ops->port_change_mtu)
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return -EOPNOTSUPP;
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dsa_switch_for_each_port(dp, ds) {
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if (dsa_port_mtu_match(dp, info)) {
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ret = ds->ops->port_change_mtu(ds, dp->index,
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info->mtu);
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if (ret)
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return ret;
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}
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}
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return 0;
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}
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static int dsa_switch_bridge_join(struct dsa_switch *ds,
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struct dsa_notifier_bridge_info *info)
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{
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int err;
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if (info->dp->ds == ds) {
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if (!ds->ops->port_bridge_join)
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return -EOPNOTSUPP;
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err = ds->ops->port_bridge_join(ds, info->dp->index,
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info->bridge,
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&info->tx_fwd_offload,
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info->extack);
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if (err)
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return err;
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}
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if (info->dp->ds != ds && ds->ops->crosschip_bridge_join) {
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err = ds->ops->crosschip_bridge_join(ds,
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info->dp->ds->dst->index,
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info->dp->ds->index,
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info->dp->index,
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info->bridge,
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info->extack);
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if (err)
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return err;
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}
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return 0;
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}
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static int dsa_switch_bridge_leave(struct dsa_switch *ds,
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struct dsa_notifier_bridge_info *info)
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{
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if (info->dp->ds == ds && ds->ops->port_bridge_leave)
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ds->ops->port_bridge_leave(ds, info->dp->index, info->bridge);
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if (info->dp->ds != ds && ds->ops->crosschip_bridge_leave)
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ds->ops->crosschip_bridge_leave(ds, info->dp->ds->dst->index,
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info->dp->ds->index,
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info->dp->index,
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info->bridge);
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return 0;
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}
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/* Matches for all upstream-facing ports (the CPU port and all upstream-facing
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* DSA links) that sit between the targeted port on which the notifier was
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* emitted and its dedicated CPU port.
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*/
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static bool dsa_port_host_address_match(struct dsa_port *dp,
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const struct dsa_port *targeted_dp)
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{
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struct dsa_port *cpu_dp = targeted_dp->cpu_dp;
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if (dsa_switch_is_upstream_of(dp->ds, targeted_dp->ds))
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return dp->index == dsa_towards_port(dp->ds, cpu_dp->ds->index,
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cpu_dp->index);
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return false;
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}
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static struct dsa_mac_addr *dsa_mac_addr_find(struct list_head *addr_list,
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const unsigned char *addr, u16 vid,
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struct dsa_db db)
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{
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struct dsa_mac_addr *a;
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list_for_each_entry(a, addr_list, list)
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if (ether_addr_equal(a->addr, addr) && a->vid == vid &&
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dsa_db_equal(&a->db, &db))
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return a;
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return NULL;
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}
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static int dsa_port_do_mdb_add(struct dsa_port *dp,
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const struct switchdev_obj_port_mdb *mdb,
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struct dsa_db db)
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{
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struct dsa_switch *ds = dp->ds;
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struct dsa_mac_addr *a;
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int port = dp->index;
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int err = 0;
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/* No need to bother with refcounting for user ports */
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if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp)))
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return ds->ops->port_mdb_add(ds, port, mdb, db);
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mutex_lock(&dp->addr_lists_lock);
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a = dsa_mac_addr_find(&dp->mdbs, mdb->addr, mdb->vid, db);
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if (a) {
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refcount_inc(&a->refcount);
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goto out;
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}
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a = kzalloc(sizeof(*a), GFP_KERNEL);
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if (!a) {
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err = -ENOMEM;
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goto out;
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}
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err = ds->ops->port_mdb_add(ds, port, mdb, db);
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if (err) {
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kfree(a);
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goto out;
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}
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ether_addr_copy(a->addr, mdb->addr);
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a->vid = mdb->vid;
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a->db = db;
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refcount_set(&a->refcount, 1);
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list_add_tail(&a->list, &dp->mdbs);
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out:
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mutex_unlock(&dp->addr_lists_lock);
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return err;
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}
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static int dsa_port_do_mdb_del(struct dsa_port *dp,
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const struct switchdev_obj_port_mdb *mdb,
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struct dsa_db db)
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{
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struct dsa_switch *ds = dp->ds;
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struct dsa_mac_addr *a;
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int port = dp->index;
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int err = 0;
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/* No need to bother with refcounting for user ports */
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if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp)))
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return ds->ops->port_mdb_del(ds, port, mdb, db);
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mutex_lock(&dp->addr_lists_lock);
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a = dsa_mac_addr_find(&dp->mdbs, mdb->addr, mdb->vid, db);
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if (!a) {
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err = -ENOENT;
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goto out;
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}
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if (!refcount_dec_and_test(&a->refcount))
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goto out;
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err = ds->ops->port_mdb_del(ds, port, mdb, db);
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if (err) {
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refcount_set(&a->refcount, 1);
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goto out;
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}
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list_del(&a->list);
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kfree(a);
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out:
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mutex_unlock(&dp->addr_lists_lock);
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return err;
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}
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static int dsa_port_do_fdb_add(struct dsa_port *dp, const unsigned char *addr,
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u16 vid, struct dsa_db db)
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{
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struct dsa_switch *ds = dp->ds;
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struct dsa_mac_addr *a;
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int port = dp->index;
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int err = 0;
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/* No need to bother with refcounting for user ports */
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if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp)))
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return ds->ops->port_fdb_add(ds, port, addr, vid, db);
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mutex_lock(&dp->addr_lists_lock);
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a = dsa_mac_addr_find(&dp->fdbs, addr, vid, db);
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if (a) {
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refcount_inc(&a->refcount);
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goto out;
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}
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a = kzalloc(sizeof(*a), GFP_KERNEL);
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if (!a) {
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err = -ENOMEM;
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goto out;
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}
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err = ds->ops->port_fdb_add(ds, port, addr, vid, db);
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if (err) {
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kfree(a);
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goto out;
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}
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ether_addr_copy(a->addr, addr);
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a->vid = vid;
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a->db = db;
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refcount_set(&a->refcount, 1);
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list_add_tail(&a->list, &dp->fdbs);
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out:
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mutex_unlock(&dp->addr_lists_lock);
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return err;
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}
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static int dsa_port_do_fdb_del(struct dsa_port *dp, const unsigned char *addr,
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u16 vid, struct dsa_db db)
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{
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struct dsa_switch *ds = dp->ds;
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struct dsa_mac_addr *a;
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int port = dp->index;
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int err = 0;
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/* No need to bother with refcounting for user ports */
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if (!(dsa_port_is_cpu(dp) || dsa_port_is_dsa(dp)))
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return ds->ops->port_fdb_del(ds, port, addr, vid, db);
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mutex_lock(&dp->addr_lists_lock);
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a = dsa_mac_addr_find(&dp->fdbs, addr, vid, db);
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if (!a) {
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err = -ENOENT;
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goto out;
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}
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if (!refcount_dec_and_test(&a->refcount))
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goto out;
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err = ds->ops->port_fdb_del(ds, port, addr, vid, db);
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if (err) {
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refcount_set(&a->refcount, 1);
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goto out;
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}
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list_del(&a->list);
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kfree(a);
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out:
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mutex_unlock(&dp->addr_lists_lock);
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return err;
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}
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static int dsa_switch_do_lag_fdb_add(struct dsa_switch *ds, struct dsa_lag *lag,
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const unsigned char *addr, u16 vid,
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struct dsa_db db)
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{
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struct dsa_mac_addr *a;
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int err = 0;
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mutex_lock(&lag->fdb_lock);
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a = dsa_mac_addr_find(&lag->fdbs, addr, vid, db);
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if (a) {
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refcount_inc(&a->refcount);
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goto out;
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}
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a = kzalloc(sizeof(*a), GFP_KERNEL);
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if (!a) {
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err = -ENOMEM;
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goto out;
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}
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err = ds->ops->lag_fdb_add(ds, *lag, addr, vid, db);
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if (err) {
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kfree(a);
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goto out;
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}
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ether_addr_copy(a->addr, addr);
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a->vid = vid;
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a->db = db;
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refcount_set(&a->refcount, 1);
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list_add_tail(&a->list, &lag->fdbs);
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out:
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mutex_unlock(&lag->fdb_lock);
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return err;
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}
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static int dsa_switch_do_lag_fdb_del(struct dsa_switch *ds, struct dsa_lag *lag,
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const unsigned char *addr, u16 vid,
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struct dsa_db db)
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{
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struct dsa_mac_addr *a;
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int err = 0;
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mutex_lock(&lag->fdb_lock);
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a = dsa_mac_addr_find(&lag->fdbs, addr, vid, db);
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if (!a) {
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err = -ENOENT;
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goto out;
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}
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if (!refcount_dec_and_test(&a->refcount))
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goto out;
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err = ds->ops->lag_fdb_del(ds, *lag, addr, vid, db);
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if (err) {
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refcount_set(&a->refcount, 1);
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goto out;
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}
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list_del(&a->list);
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kfree(a);
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out:
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mutex_unlock(&lag->fdb_lock);
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return err;
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}
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static int dsa_switch_host_fdb_add(struct dsa_switch *ds,
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struct dsa_notifier_fdb_info *info)
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{
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struct dsa_port *dp;
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int err = 0;
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if (!ds->ops->port_fdb_add)
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return -EOPNOTSUPP;
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dsa_switch_for_each_port(dp, ds) {
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if (dsa_port_host_address_match(dp, info->dp)) {
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if (dsa_port_is_cpu(dp) && info->dp->cpu_port_in_lag) {
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err = dsa_switch_do_lag_fdb_add(ds, dp->lag,
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info->addr,
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info->vid,
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info->db);
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} else {
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err = dsa_port_do_fdb_add(dp, info->addr,
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info->vid, info->db);
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}
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if (err)
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break;
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}
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}
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return err;
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}
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static int dsa_switch_host_fdb_del(struct dsa_switch *ds,
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struct dsa_notifier_fdb_info *info)
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{
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struct dsa_port *dp;
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int err = 0;
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if (!ds->ops->port_fdb_del)
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return -EOPNOTSUPP;
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dsa_switch_for_each_port(dp, ds) {
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if (dsa_port_host_address_match(dp, info->dp)) {
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if (dsa_port_is_cpu(dp) && info->dp->cpu_port_in_lag) {
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err = dsa_switch_do_lag_fdb_del(ds, dp->lag,
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info->addr,
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info->vid,
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info->db);
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} else {
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err = dsa_port_do_fdb_del(dp, info->addr,
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info->vid, info->db);
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}
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if (err)
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break;
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}
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}
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return err;
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}
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static int dsa_switch_fdb_add(struct dsa_switch *ds,
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struct dsa_notifier_fdb_info *info)
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{
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int port = dsa_towards_port(ds, info->dp->ds->index, info->dp->index);
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struct dsa_port *dp = dsa_to_port(ds, port);
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if (!ds->ops->port_fdb_add)
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return -EOPNOTSUPP;
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return dsa_port_do_fdb_add(dp, info->addr, info->vid, info->db);
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}
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static int dsa_switch_fdb_del(struct dsa_switch *ds,
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struct dsa_notifier_fdb_info *info)
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{
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int port = dsa_towards_port(ds, info->dp->ds->index, info->dp->index);
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struct dsa_port *dp = dsa_to_port(ds, port);
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if (!ds->ops->port_fdb_del)
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return -EOPNOTSUPP;
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return dsa_port_do_fdb_del(dp, info->addr, info->vid, info->db);
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}
|
|
|
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static int dsa_switch_lag_fdb_add(struct dsa_switch *ds,
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struct dsa_notifier_lag_fdb_info *info)
|
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{
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struct dsa_port *dp;
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|
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if (!ds->ops->lag_fdb_add)
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return -EOPNOTSUPP;
|
|
|
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/* Notify switch only if it has a port in this LAG */
|
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dsa_switch_for_each_port(dp, ds)
|
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if (dsa_port_offloads_lag(dp, info->lag))
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return dsa_switch_do_lag_fdb_add(ds, info->lag,
|
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info->addr, info->vid,
|
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info->db);
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return 0;
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}
|
|
|
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static int dsa_switch_lag_fdb_del(struct dsa_switch *ds,
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struct dsa_notifier_lag_fdb_info *info)
|
|
{
|
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struct dsa_port *dp;
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|
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if (!ds->ops->lag_fdb_del)
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return -EOPNOTSUPP;
|
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|
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/* Notify switch only if it has a port in this LAG */
|
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dsa_switch_for_each_port(dp, ds)
|
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if (dsa_port_offloads_lag(dp, info->lag))
|
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return dsa_switch_do_lag_fdb_del(ds, info->lag,
|
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info->addr, info->vid,
|
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info->db);
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|
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return 0;
|
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}
|
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|
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static int dsa_switch_lag_change(struct dsa_switch *ds,
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struct dsa_notifier_lag_info *info)
|
|
{
|
|
if (info->dp->ds == ds && ds->ops->port_lag_change)
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return ds->ops->port_lag_change(ds, info->dp->index);
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|
|
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if (info->dp->ds != ds && ds->ops->crosschip_lag_change)
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return ds->ops->crosschip_lag_change(ds, info->dp->ds->index,
|
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info->dp->index);
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|
|
return 0;
|
|
}
|
|
|
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static int dsa_switch_lag_join(struct dsa_switch *ds,
|
|
struct dsa_notifier_lag_info *info)
|
|
{
|
|
if (info->dp->ds == ds && ds->ops->port_lag_join)
|
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return ds->ops->port_lag_join(ds, info->dp->index, info->lag,
|
|
info->info, info->extack);
|
|
|
|
if (info->dp->ds != ds && ds->ops->crosschip_lag_join)
|
|
return ds->ops->crosschip_lag_join(ds, info->dp->ds->index,
|
|
info->dp->index, info->lag,
|
|
info->info, info->extack);
|
|
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
static int dsa_switch_lag_leave(struct dsa_switch *ds,
|
|
struct dsa_notifier_lag_info *info)
|
|
{
|
|
if (info->dp->ds == ds && ds->ops->port_lag_leave)
|
|
return ds->ops->port_lag_leave(ds, info->dp->index, info->lag);
|
|
|
|
if (info->dp->ds != ds && ds->ops->crosschip_lag_leave)
|
|
return ds->ops->crosschip_lag_leave(ds, info->dp->ds->index,
|
|
info->dp->index, 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->dp->ds->index, info->dp->index);
|
|
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->dp->ds->index, info->dp->index);
|
|
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->dp)) {
|
|
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->dp)) {
|
|
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)
|
|
{
|
|
return dsa_port_is_dsa(dp) || dp == info->dp;
|
|
}
|
|
|
|
/* 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,
|
|
const struct dsa_port *targeted_dp)
|
|
{
|
|
struct dsa_port *cpu_dp = targeted_dp->cpu_dp;
|
|
|
|
if (dsa_switch_is_upstream_of(dp->ds, targeted_dp->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->dp)) {
|
|
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->dp)) {
|
|
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();
|
|
|
|
err = ds->ops->change_tag_protocol(ds, tag_ops->proto);
|
|
if (err)
|
|
return err;
|
|
|
|
dsa_switch_for_each_cpu_port(cpu_dp, ds)
|
|
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);
|
|
}
|
|
|
|
/**
|
|
* dsa_tree_notify - Execute code for all switches in a DSA switch tree.
|
|
* @dst: collection of struct dsa_switch devices to notify.
|
|
* @e: event, must be of type DSA_NOTIFIER_*
|
|
* @v: event-specific value.
|
|
*
|
|
* Given a struct dsa_switch_tree, this can be used to run a function once for
|
|
* each member DSA switch. The other alternative of traversing the tree is only
|
|
* through its ports list, which does not uniquely list the switches.
|
|
*/
|
|
int dsa_tree_notify(struct dsa_switch_tree *dst, unsigned long e, void *v)
|
|
{
|
|
struct raw_notifier_head *nh = &dst->nh;
|
|
int err;
|
|
|
|
err = raw_notifier_call_chain(nh, e, v);
|
|
|
|
return notifier_to_errno(err);
|
|
}
|
|
|
|
/**
|
|
* dsa_broadcast - Notify all DSA trees in the system.
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* @e: event, must be of type DSA_NOTIFIER_*
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* @v: event-specific value.
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*
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* Can be used to notify the switching fabric of events such as cross-chip
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* bridging between disjoint trees (such as islands of tagger-compatible
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* switches bridged by an incompatible middle switch).
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*
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* WARNING: this function is not reliable during probe time, because probing
|
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* between trees is asynchronous and not all DSA trees might have probed.
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*/
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int dsa_broadcast(unsigned long e, void *v)
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{
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struct dsa_switch_tree *dst;
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int err = 0;
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|
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list_for_each_entry(dst, &dsa_tree_list, list) {
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err = dsa_tree_notify(dst, e, v);
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if (err)
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break;
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|
}
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|
|
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return err;
|
|
}
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|
|
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int dsa_switch_register_notifier(struct dsa_switch *ds)
|
|
{
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|
ds->nb.notifier_call = dsa_switch_event;
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|
|
|
return raw_notifier_chain_register(&ds->dst->nh, &ds->nb);
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|
}
|
|
|
|
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);
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|
}
|