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- // SPDX-License-Identifier: GPL-2.0-or-later
- /*
- * net/dsa/slave.c - Slave device handling
- * Copyright (c) 2008-2009 Marvell Semiconductor
- */
- #include <linux/list.h>
- #include <linux/etherdevice.h>
- #include <linux/netdevice.h>
- #include <linux/phy.h>
- #include <linux/phy_fixed.h>
- #include <linux/phylink.h>
- #include <linux/of_net.h>
- #include <linux/of_mdio.h>
- #include <linux/mdio.h>
- #include <net/rtnetlink.h>
- #include <net/pkt_cls.h>
- #include <net/tc_act/tc_mirred.h>
- #include <linux/if_bridge.h>
- #include <linux/netpoll.h>
- #include <linux/ptp_classify.h>
- #include "dsa_priv.h"
- /* slave mii_bus handling ***************************************************/
- static int dsa_slave_phy_read(struct mii_bus *bus, int addr, int reg)
- {
- struct dsa_switch *ds = bus->priv;
- if (ds->phys_mii_mask & (1 << addr))
- return ds->ops->phy_read(ds, addr, reg);
- return 0xffff;
- }
- static int dsa_slave_phy_write(struct mii_bus *bus, int addr, int reg, u16 val)
- {
- struct dsa_switch *ds = bus->priv;
- if (ds->phys_mii_mask & (1 << addr))
- return ds->ops->phy_write(ds, addr, reg, val);
- return 0;
- }
- void dsa_slave_mii_bus_init(struct dsa_switch *ds)
- {
- ds->slave_mii_bus->priv = (void *)ds;
- ds->slave_mii_bus->name = "dsa slave smi";
- ds->slave_mii_bus->read = dsa_slave_phy_read;
- ds->slave_mii_bus->write = dsa_slave_phy_write;
- snprintf(ds->slave_mii_bus->id, MII_BUS_ID_SIZE, "dsa-%d.%d",
- ds->dst->index, ds->index);
- ds->slave_mii_bus->parent = ds->dev;
- ds->slave_mii_bus->phy_mask = ~ds->phys_mii_mask;
- }
- /* slave device handling ****************************************************/
- static int dsa_slave_get_iflink(const struct net_device *dev)
- {
- return dsa_slave_to_master(dev)->ifindex;
- }
- static int dsa_slave_open(struct net_device *dev)
- {
- struct net_device *master = dsa_slave_to_master(dev);
- struct dsa_port *dp = dsa_slave_to_port(dev);
- int err;
- if (!(master->flags & IFF_UP))
- return -ENETDOWN;
- if (!ether_addr_equal(dev->dev_addr, master->dev_addr)) {
- err = dev_uc_add(master, dev->dev_addr);
- if (err < 0)
- goto out;
- }
- if (dev->flags & IFF_ALLMULTI) {
- err = dev_set_allmulti(master, 1);
- if (err < 0)
- goto del_unicast;
- }
- if (dev->flags & IFF_PROMISC) {
- err = dev_set_promiscuity(master, 1);
- if (err < 0)
- goto clear_allmulti;
- }
- err = dsa_port_enable_rt(dp, dev->phydev);
- if (err)
- goto clear_promisc;
- return 0;
- clear_promisc:
- if (dev->flags & IFF_PROMISC)
- dev_set_promiscuity(master, -1);
- clear_allmulti:
- if (dev->flags & IFF_ALLMULTI)
- dev_set_allmulti(master, -1);
- del_unicast:
- if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
- dev_uc_del(master, dev->dev_addr);
- out:
- return err;
- }
- static int dsa_slave_close(struct net_device *dev)
- {
- struct net_device *master = dsa_slave_to_master(dev);
- struct dsa_port *dp = dsa_slave_to_port(dev);
- dsa_port_disable_rt(dp);
- dev_mc_unsync(master, dev);
- dev_uc_unsync(master, dev);
- if (dev->flags & IFF_ALLMULTI)
- dev_set_allmulti(master, -1);
- if (dev->flags & IFF_PROMISC)
- dev_set_promiscuity(master, -1);
- if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
- dev_uc_del(master, dev->dev_addr);
- return 0;
- }
- static void dsa_slave_change_rx_flags(struct net_device *dev, int change)
- {
- struct net_device *master = dsa_slave_to_master(dev);
- if (dev->flags & IFF_UP) {
- if (change & IFF_ALLMULTI)
- dev_set_allmulti(master,
- dev->flags & IFF_ALLMULTI ? 1 : -1);
- if (change & IFF_PROMISC)
- dev_set_promiscuity(master,
- dev->flags & IFF_PROMISC ? 1 : -1);
- }
- }
- static void dsa_slave_set_rx_mode(struct net_device *dev)
- {
- struct net_device *master = dsa_slave_to_master(dev);
- dev_mc_sync(master, dev);
- dev_uc_sync(master, dev);
- }
- static int dsa_slave_set_mac_address(struct net_device *dev, void *a)
- {
- struct net_device *master = dsa_slave_to_master(dev);
- struct sockaddr *addr = a;
- int err;
- if (!is_valid_ether_addr(addr->sa_data))
- return -EADDRNOTAVAIL;
- if (!(dev->flags & IFF_UP))
- goto out;
- if (!ether_addr_equal(addr->sa_data, master->dev_addr)) {
- err = dev_uc_add(master, addr->sa_data);
- if (err < 0)
- return err;
- }
- if (!ether_addr_equal(dev->dev_addr, master->dev_addr))
- dev_uc_del(master, dev->dev_addr);
- out:
- ether_addr_copy(dev->dev_addr, addr->sa_data);
- return 0;
- }
- struct dsa_slave_dump_ctx {
- struct net_device *dev;
- struct sk_buff *skb;
- struct netlink_callback *cb;
- int idx;
- };
- static int
- dsa_slave_port_fdb_do_dump(const unsigned char *addr, u16 vid,
- bool is_static, void *data)
- {
- struct dsa_slave_dump_ctx *dump = data;
- u32 portid = NETLINK_CB(dump->cb->skb).portid;
- u32 seq = dump->cb->nlh->nlmsg_seq;
- struct nlmsghdr *nlh;
- struct ndmsg *ndm;
- if (dump->idx < dump->cb->args[2])
- goto skip;
- nlh = nlmsg_put(dump->skb, portid, seq, RTM_NEWNEIGH,
- sizeof(*ndm), NLM_F_MULTI);
- if (!nlh)
- return -EMSGSIZE;
- ndm = nlmsg_data(nlh);
- ndm->ndm_family = AF_BRIDGE;
- ndm->ndm_pad1 = 0;
- ndm->ndm_pad2 = 0;
- ndm->ndm_flags = NTF_SELF;
- ndm->ndm_type = 0;
- ndm->ndm_ifindex = dump->dev->ifindex;
- ndm->ndm_state = is_static ? NUD_NOARP : NUD_REACHABLE;
- if (nla_put(dump->skb, NDA_LLADDR, ETH_ALEN, addr))
- goto nla_put_failure;
- if (vid && nla_put_u16(dump->skb, NDA_VLAN, vid))
- goto nla_put_failure;
- nlmsg_end(dump->skb, nlh);
- skip:
- dump->idx++;
- return 0;
- nla_put_failure:
- nlmsg_cancel(dump->skb, nlh);
- return -EMSGSIZE;
- }
- static int
- dsa_slave_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
- struct net_device *dev, struct net_device *filter_dev,
- int *idx)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_slave_dump_ctx dump = {
- .dev = dev,
- .skb = skb,
- .cb = cb,
- .idx = *idx,
- };
- int err;
- err = dsa_port_fdb_dump(dp, dsa_slave_port_fdb_do_dump, &dump);
- *idx = dump.idx;
- return err;
- }
- static int dsa_slave_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
- {
- struct dsa_slave_priv *p = netdev_priv(dev);
- struct dsa_switch *ds = p->dp->ds;
- int port = p->dp->index;
- /* Pass through to switch driver if it supports timestamping */
- switch (cmd) {
- case SIOCGHWTSTAMP:
- if (ds->ops->port_hwtstamp_get)
- return ds->ops->port_hwtstamp_get(ds, port, ifr);
- break;
- case SIOCSHWTSTAMP:
- if (ds->ops->port_hwtstamp_set)
- return ds->ops->port_hwtstamp_set(ds, port, ifr);
- break;
- }
- return phylink_mii_ioctl(p->dp->pl, ifr, cmd);
- }
- static int dsa_slave_port_attr_set(struct net_device *dev,
- const struct switchdev_attr *attr,
- struct switchdev_trans *trans)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- int ret;
- switch (attr->id) {
- case SWITCHDEV_ATTR_ID_PORT_STP_STATE:
- ret = dsa_port_set_state(dp, attr->u.stp_state, trans);
- break;
- case SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING:
- ret = dsa_port_vlan_filtering(dp, attr->u.vlan_filtering,
- trans);
- break;
- case SWITCHDEV_ATTR_ID_BRIDGE_AGEING_TIME:
- ret = dsa_port_ageing_time(dp, attr->u.ageing_time, trans);
- break;
- case SWITCHDEV_ATTR_ID_PORT_PRE_BRIDGE_FLAGS:
- ret = dsa_port_pre_bridge_flags(dp, attr->u.brport_flags,
- trans);
- break;
- case SWITCHDEV_ATTR_ID_PORT_BRIDGE_FLAGS:
- ret = dsa_port_bridge_flags(dp, attr->u.brport_flags, trans);
- break;
- case SWITCHDEV_ATTR_ID_BRIDGE_MROUTER:
- ret = dsa_port_mrouter(dp->cpu_dp, attr->u.mrouter, trans);
- break;
- default:
- ret = -EOPNOTSUPP;
- break;
- }
- return ret;
- }
- /* Must be called under rcu_read_lock() */
- static int
- dsa_slave_vlan_check_for_8021q_uppers(struct net_device *slave,
- const struct switchdev_obj_port_vlan *vlan)
- {
- struct net_device *upper_dev;
- struct list_head *iter;
- netdev_for_each_upper_dev_rcu(slave, upper_dev, iter) {
- u16 vid;
- if (!is_vlan_dev(upper_dev))
- continue;
- vid = vlan_dev_vlan_id(upper_dev);
- if (vid >= vlan->vid_begin && vid <= vlan->vid_end)
- return -EBUSY;
- }
- return 0;
- }
- static int dsa_slave_vlan_add(struct net_device *dev,
- const struct switchdev_obj *obj,
- struct switchdev_trans *trans)
- {
- 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 vid, err;
- if (obj->orig_dev != dev)
- return -EOPNOTSUPP;
- if (dsa_port_skip_vlan_configuration(dp))
- return 0;
- vlan = *SWITCHDEV_OBJ_PORT_VLAN(obj);
- /* Deny adding a bridge VLAN when there is already an 802.1Q upper with
- * the same VID.
- */
- if (trans->ph_prepare && br_vlan_enabled(dp->bridge_dev)) {
- rcu_read_lock();
- err = dsa_slave_vlan_check_for_8021q_uppers(dev, &vlan);
- rcu_read_unlock();
- if (err)
- return err;
- }
- err = dsa_port_vlan_add(dp, &vlan, trans);
- if (err)
- return err;
- /* 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,
- * 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, trans);
- if (err)
- return err;
- for (vid = vlan.vid_begin; vid <= vlan.vid_end; vid++) {
- err = vlan_vid_add(master, htons(ETH_P_8021Q), vid);
- if (err)
- return err;
- }
- return 0;
- }
- static int dsa_slave_port_obj_add(struct net_device *dev,
- const struct switchdev_obj *obj,
- struct switchdev_trans *trans,
- struct netlink_ext_ack *extack)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- int err;
- /* For the prepare phase, ensure the full set of changes is feasable in
- * one go in order to signal a failure properly. If an operation is not
- * supported, return -EOPNOTSUPP.
- */
- switch (obj->id) {
- case SWITCHDEV_OBJ_ID_PORT_MDB:
- if (obj->orig_dev != dev)
- return -EOPNOTSUPP;
- err = dsa_port_mdb_add(dp, SWITCHDEV_OBJ_PORT_MDB(obj), trans);
- break;
- case SWITCHDEV_OBJ_ID_HOST_MDB:
- /* DSA can directly translate this to a normal MDB add,
- * but on the CPU port.
- */
- err = dsa_port_mdb_add(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj),
- trans);
- break;
- case SWITCHDEV_OBJ_ID_PORT_VLAN:
- err = dsa_slave_vlan_add(dev, obj, trans);
- break;
- default:
- err = -EOPNOTSUPP;
- break;
- }
- return err;
- }
- 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 vid, err;
- if (obj->orig_dev != dev)
- return -EOPNOTSUPP;
- 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;
- for (vid = vlan->vid_begin; vid <= vlan->vid_end; vid++)
- vlan_vid_del(master, htons(ETH_P_8021Q), vid);
- return 0;
- }
- static int dsa_slave_port_obj_del(struct net_device *dev,
- const struct switchdev_obj *obj)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- int err;
- switch (obj->id) {
- case SWITCHDEV_OBJ_ID_PORT_MDB:
- if (obj->orig_dev != dev)
- return -EOPNOTSUPP;
- err = dsa_port_mdb_del(dp, SWITCHDEV_OBJ_PORT_MDB(obj));
- break;
- case SWITCHDEV_OBJ_ID_HOST_MDB:
- /* DSA can directly translate this to a normal MDB add,
- * but on the CPU port.
- */
- err = dsa_port_mdb_del(dp->cpu_dp, SWITCHDEV_OBJ_PORT_MDB(obj));
- break;
- case SWITCHDEV_OBJ_ID_PORT_VLAN:
- err = dsa_slave_vlan_del(dev, obj);
- break;
- default:
- err = -EOPNOTSUPP;
- break;
- }
- return err;
- }
- static int dsa_slave_get_port_parent_id(struct net_device *dev,
- struct netdev_phys_item_id *ppid)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- struct dsa_switch_tree *dst = ds->dst;
- /* For non-legacy ports, devlink is used and it takes
- * care of the name generation. This ndo implementation
- * should be removed with legacy support.
- */
- if (dp->ds->devlink)
- return -EOPNOTSUPP;
- ppid->id_len = sizeof(dst->index);
- memcpy(&ppid->id, &dst->index, ppid->id_len);
- return 0;
- }
- static inline netdev_tx_t dsa_slave_netpoll_send_skb(struct net_device *dev,
- struct sk_buff *skb)
- {
- #ifdef CONFIG_NET_POLL_CONTROLLER
- struct dsa_slave_priv *p = netdev_priv(dev);
- return netpoll_send_skb(p->netpoll, skb);
- #else
- BUG();
- return NETDEV_TX_OK;
- #endif
- }
- static void dsa_skb_tx_timestamp(struct dsa_slave_priv *p,
- struct sk_buff *skb)
- {
- struct dsa_switch *ds = p->dp->ds;
- struct sk_buff *clone;
- unsigned int type;
- type = ptp_classify_raw(skb);
- if (type == PTP_CLASS_NONE)
- return;
- if (!ds->ops->port_txtstamp)
- return;
- clone = skb_clone_sk(skb);
- if (!clone)
- return;
- DSA_SKB_CB(skb)->clone = clone;
- if (ds->ops->port_txtstamp(ds, p->dp->index, clone, type))
- return;
- kfree_skb(clone);
- }
- netdev_tx_t dsa_enqueue_skb(struct sk_buff *skb, struct net_device *dev)
- {
- /* SKB for netpoll still need to be mangled with the protocol-specific
- * tag to be successfully transmitted
- */
- if (unlikely(netpoll_tx_running(dev)))
- return dsa_slave_netpoll_send_skb(dev, skb);
- /* Queue the SKB for transmission on the parent interface, but
- * do not modify its EtherType
- */
- skb->dev = dsa_slave_to_master(dev);
- dev_queue_xmit(skb);
- return NETDEV_TX_OK;
- }
- EXPORT_SYMBOL_GPL(dsa_enqueue_skb);
- static int dsa_realloc_skb(struct sk_buff *skb, struct net_device *dev)
- {
- int needed_headroom = dev->needed_headroom;
- int needed_tailroom = dev->needed_tailroom;
- /* For tail taggers, we need to pad short frames ourselves, to ensure
- * that the tail tag does not fail at its role of being at the end of
- * the packet, once the master interface pads the frame. Account for
- * that pad length here, and pad later.
- */
- if (unlikely(needed_tailroom && skb->len < ETH_ZLEN))
- needed_tailroom += ETH_ZLEN - skb->len;
- /* skb_headroom() returns unsigned int... */
- needed_headroom = max_t(int, needed_headroom - skb_headroom(skb), 0);
- needed_tailroom = max_t(int, needed_tailroom - skb_tailroom(skb), 0);
- if (likely(!needed_headroom && !needed_tailroom && !skb_cloned(skb)))
- /* No reallocation needed, yay! */
- return 0;
- return pskb_expand_head(skb, needed_headroom, needed_tailroom,
- GFP_ATOMIC);
- }
- static netdev_tx_t dsa_slave_xmit(struct sk_buff *skb, struct net_device *dev)
- {
- struct dsa_slave_priv *p = netdev_priv(dev);
- struct pcpu_sw_netstats *s;
- struct sk_buff *nskb;
- s = this_cpu_ptr(p->stats64);
- u64_stats_update_begin(&s->syncp);
- s->tx_packets++;
- s->tx_bytes += skb->len;
- u64_stats_update_end(&s->syncp);
- DSA_SKB_CB(skb)->clone = NULL;
- /* Identify PTP protocol packets, clone them, and pass them to the
- * switch driver
- */
- dsa_skb_tx_timestamp(p, skb);
- if (dsa_realloc_skb(skb, dev)) {
- dev_kfree_skb_any(skb);
- return NETDEV_TX_OK;
- }
- /* needed_tailroom should still be 'warm' in the cache line from
- * dsa_realloc_skb(), which has also ensured that padding is safe.
- */
- if (dev->needed_tailroom)
- eth_skb_pad(skb);
- /* Transmit function may have to reallocate the original SKB,
- * in which case it must have freed it. Only free it here on error.
- */
- nskb = p->xmit(skb, dev);
- if (!nskb) {
- kfree_skb(skb);
- return NETDEV_TX_OK;
- }
- return dsa_enqueue_skb(nskb, dev);
- }
- /* ethtool operations *******************************************************/
- static void dsa_slave_get_drvinfo(struct net_device *dev,
- struct ethtool_drvinfo *drvinfo)
- {
- strlcpy(drvinfo->driver, "dsa", sizeof(drvinfo->driver));
- strlcpy(drvinfo->fw_version, "N/A", sizeof(drvinfo->fw_version));
- strlcpy(drvinfo->bus_info, "platform", sizeof(drvinfo->bus_info));
- }
- static int dsa_slave_get_regs_len(struct net_device *dev)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- if (ds->ops->get_regs_len)
- return ds->ops->get_regs_len(ds, dp->index);
- return -EOPNOTSUPP;
- }
- static void
- dsa_slave_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *_p)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- if (ds->ops->get_regs)
- ds->ops->get_regs(ds, dp->index, regs, _p);
- }
- static int dsa_slave_nway_reset(struct net_device *dev)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- return phylink_ethtool_nway_reset(dp->pl);
- }
- static int dsa_slave_get_eeprom_len(struct net_device *dev)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- if (ds->cd && ds->cd->eeprom_len)
- return ds->cd->eeprom_len;
- if (ds->ops->get_eeprom_len)
- return ds->ops->get_eeprom_len(ds);
- return 0;
- }
- static int dsa_slave_get_eeprom(struct net_device *dev,
- struct ethtool_eeprom *eeprom, u8 *data)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- if (ds->ops->get_eeprom)
- return ds->ops->get_eeprom(ds, eeprom, data);
- return -EOPNOTSUPP;
- }
- static int dsa_slave_set_eeprom(struct net_device *dev,
- struct ethtool_eeprom *eeprom, u8 *data)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- if (ds->ops->set_eeprom)
- return ds->ops->set_eeprom(ds, eeprom, data);
- return -EOPNOTSUPP;
- }
- static void dsa_slave_get_strings(struct net_device *dev,
- uint32_t stringset, uint8_t *data)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- if (stringset == ETH_SS_STATS) {
- int len = ETH_GSTRING_LEN;
- strncpy(data, "tx_packets", len);
- strncpy(data + len, "tx_bytes", len);
- strncpy(data + 2 * len, "rx_packets", len);
- strncpy(data + 3 * len, "rx_bytes", len);
- if (ds->ops->get_strings)
- ds->ops->get_strings(ds, dp->index, stringset,
- data + 4 * len);
- }
- }
- static void dsa_slave_get_ethtool_stats(struct net_device *dev,
- struct ethtool_stats *stats,
- uint64_t *data)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_slave_priv *p = netdev_priv(dev);
- struct dsa_switch *ds = dp->ds;
- struct pcpu_sw_netstats *s;
- unsigned int start;
- int i;
- for_each_possible_cpu(i) {
- u64 tx_packets, tx_bytes, rx_packets, rx_bytes;
- s = per_cpu_ptr(p->stats64, i);
- do {
- start = u64_stats_fetch_begin_irq(&s->syncp);
- tx_packets = s->tx_packets;
- tx_bytes = s->tx_bytes;
- rx_packets = s->rx_packets;
- rx_bytes = s->rx_bytes;
- } while (u64_stats_fetch_retry_irq(&s->syncp, start));
- data[0] += tx_packets;
- data[1] += tx_bytes;
- data[2] += rx_packets;
- data[3] += rx_bytes;
- }
- if (ds->ops->get_ethtool_stats)
- ds->ops->get_ethtool_stats(ds, dp->index, data + 4);
- }
- static int dsa_slave_get_sset_count(struct net_device *dev, int sset)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- if (sset == ETH_SS_STATS) {
- int count = 0;
- if (ds->ops->get_sset_count) {
- count = ds->ops->get_sset_count(ds, dp->index, sset);
- if (count < 0)
- return count;
- }
- return count + 4;
- }
- return -EOPNOTSUPP;
- }
- static void dsa_slave_get_wol(struct net_device *dev, struct ethtool_wolinfo *w)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- phylink_ethtool_get_wol(dp->pl, w);
- if (ds->ops->get_wol)
- ds->ops->get_wol(ds, dp->index, w);
- }
- static int dsa_slave_set_wol(struct net_device *dev, struct ethtool_wolinfo *w)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- int ret = -EOPNOTSUPP;
- phylink_ethtool_set_wol(dp->pl, w);
- if (ds->ops->set_wol)
- ret = ds->ops->set_wol(ds, dp->index, w);
- return ret;
- }
- static int dsa_slave_set_eee(struct net_device *dev, struct ethtool_eee *e)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- int ret;
- /* Port's PHY and MAC both need to be EEE capable */
- if (!dev->phydev || !dp->pl)
- return -ENODEV;
- if (!ds->ops->set_mac_eee)
- return -EOPNOTSUPP;
- ret = ds->ops->set_mac_eee(ds, dp->index, e);
- if (ret)
- return ret;
- return phylink_ethtool_set_eee(dp->pl, e);
- }
- static int dsa_slave_get_eee(struct net_device *dev, struct ethtool_eee *e)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- int ret;
- /* Port's PHY and MAC both need to be EEE capable */
- if (!dev->phydev || !dp->pl)
- return -ENODEV;
- if (!ds->ops->get_mac_eee)
- return -EOPNOTSUPP;
- ret = ds->ops->get_mac_eee(ds, dp->index, e);
- if (ret)
- return ret;
- return phylink_ethtool_get_eee(dp->pl, e);
- }
- static int dsa_slave_get_link_ksettings(struct net_device *dev,
- struct ethtool_link_ksettings *cmd)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- return phylink_ethtool_ksettings_get(dp->pl, cmd);
- }
- static int dsa_slave_set_link_ksettings(struct net_device *dev,
- const struct ethtool_link_ksettings *cmd)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- return phylink_ethtool_ksettings_set(dp->pl, cmd);
- }
- static void dsa_slave_get_pauseparam(struct net_device *dev,
- struct ethtool_pauseparam *pause)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- phylink_ethtool_get_pauseparam(dp->pl, pause);
- }
- static int dsa_slave_set_pauseparam(struct net_device *dev,
- struct ethtool_pauseparam *pause)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- return phylink_ethtool_set_pauseparam(dp->pl, pause);
- }
- #ifdef CONFIG_NET_POLL_CONTROLLER
- static int dsa_slave_netpoll_setup(struct net_device *dev,
- struct netpoll_info *ni)
- {
- struct net_device *master = dsa_slave_to_master(dev);
- struct dsa_slave_priv *p = netdev_priv(dev);
- struct netpoll *netpoll;
- int err = 0;
- netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL);
- if (!netpoll)
- return -ENOMEM;
- err = __netpoll_setup(netpoll, master);
- if (err) {
- kfree(netpoll);
- goto out;
- }
- p->netpoll = netpoll;
- out:
- return err;
- }
- static void dsa_slave_netpoll_cleanup(struct net_device *dev)
- {
- struct dsa_slave_priv *p = netdev_priv(dev);
- struct netpoll *netpoll = p->netpoll;
- if (!netpoll)
- return;
- p->netpoll = NULL;
- __netpoll_free(netpoll);
- }
- static void dsa_slave_poll_controller(struct net_device *dev)
- {
- }
- #endif
- static int dsa_slave_get_phys_port_name(struct net_device *dev,
- char *name, size_t len)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- /* For non-legacy ports, devlink is used and it takes
- * care of the name generation. This ndo implementation
- * should be removed with legacy support.
- */
- if (dp->ds->devlink)
- return -EOPNOTSUPP;
- if (snprintf(name, len, "p%d", dp->index) >= len)
- return -EINVAL;
- return 0;
- }
- static struct dsa_mall_tc_entry *
- dsa_slave_mall_tc_entry_find(struct net_device *dev, unsigned long cookie)
- {
- struct dsa_slave_priv *p = netdev_priv(dev);
- struct dsa_mall_tc_entry *mall_tc_entry;
- list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list)
- if (mall_tc_entry->cookie == cookie)
- return mall_tc_entry;
- return NULL;
- }
- static int
- dsa_slave_add_cls_matchall_mirred(struct net_device *dev,
- struct tc_cls_matchall_offload *cls,
- bool ingress)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_slave_priv *p = netdev_priv(dev);
- struct dsa_mall_mirror_tc_entry *mirror;
- struct dsa_mall_tc_entry *mall_tc_entry;
- struct dsa_switch *ds = dp->ds;
- struct flow_action_entry *act;
- struct dsa_port *to_dp;
- int err;
- if (!ds->ops->port_mirror_add)
- return -EOPNOTSUPP;
- if (!flow_action_basic_hw_stats_check(&cls->rule->action,
- cls->common.extack))
- return -EOPNOTSUPP;
- act = &cls->rule->action.entries[0];
- if (!act->dev)
- return -EINVAL;
- if (!dsa_slave_dev_check(act->dev))
- return -EOPNOTSUPP;
- mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
- if (!mall_tc_entry)
- return -ENOMEM;
- mall_tc_entry->cookie = cls->cookie;
- mall_tc_entry->type = DSA_PORT_MALL_MIRROR;
- mirror = &mall_tc_entry->mirror;
- to_dp = dsa_slave_to_port(act->dev);
- mirror->to_local_port = to_dp->index;
- mirror->ingress = ingress;
- err = ds->ops->port_mirror_add(ds, dp->index, mirror, ingress);
- if (err) {
- kfree(mall_tc_entry);
- return err;
- }
- list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
- return err;
- }
- static int
- dsa_slave_add_cls_matchall_police(struct net_device *dev,
- struct tc_cls_matchall_offload *cls,
- bool ingress)
- {
- struct netlink_ext_ack *extack = cls->common.extack;
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_slave_priv *p = netdev_priv(dev);
- struct dsa_mall_policer_tc_entry *policer;
- struct dsa_mall_tc_entry *mall_tc_entry;
- struct dsa_switch *ds = dp->ds;
- struct flow_action_entry *act;
- int err;
- if (!ds->ops->port_policer_add) {
- NL_SET_ERR_MSG_MOD(extack,
- "Policing offload not implemented");
- return -EOPNOTSUPP;
- }
- if (!ingress) {
- NL_SET_ERR_MSG_MOD(extack,
- "Only supported on ingress qdisc");
- return -EOPNOTSUPP;
- }
- if (!flow_action_basic_hw_stats_check(&cls->rule->action,
- cls->common.extack))
- return -EOPNOTSUPP;
- list_for_each_entry(mall_tc_entry, &p->mall_tc_list, list) {
- if (mall_tc_entry->type == DSA_PORT_MALL_POLICER) {
- NL_SET_ERR_MSG_MOD(extack,
- "Only one port policer allowed");
- return -EEXIST;
- }
- }
- act = &cls->rule->action.entries[0];
- mall_tc_entry = kzalloc(sizeof(*mall_tc_entry), GFP_KERNEL);
- if (!mall_tc_entry)
- return -ENOMEM;
- mall_tc_entry->cookie = cls->cookie;
- mall_tc_entry->type = DSA_PORT_MALL_POLICER;
- policer = &mall_tc_entry->policer;
- policer->rate_bytes_per_sec = act->police.rate_bytes_ps;
- policer->burst = act->police.burst;
- err = ds->ops->port_policer_add(ds, dp->index, policer);
- if (err) {
- kfree(mall_tc_entry);
- return err;
- }
- list_add_tail(&mall_tc_entry->list, &p->mall_tc_list);
- return err;
- }
- static int dsa_slave_add_cls_matchall(struct net_device *dev,
- struct tc_cls_matchall_offload *cls,
- bool ingress)
- {
- int err = -EOPNOTSUPP;
- if (cls->common.protocol == htons(ETH_P_ALL) &&
- flow_offload_has_one_action(&cls->rule->action) &&
- cls->rule->action.entries[0].id == FLOW_ACTION_MIRRED)
- err = dsa_slave_add_cls_matchall_mirred(dev, cls, ingress);
- else if (flow_offload_has_one_action(&cls->rule->action) &&
- cls->rule->action.entries[0].id == FLOW_ACTION_POLICE)
- err = dsa_slave_add_cls_matchall_police(dev, cls, ingress);
- return err;
- }
- static void dsa_slave_del_cls_matchall(struct net_device *dev,
- struct tc_cls_matchall_offload *cls)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_mall_tc_entry *mall_tc_entry;
- struct dsa_switch *ds = dp->ds;
- mall_tc_entry = dsa_slave_mall_tc_entry_find(dev, cls->cookie);
- if (!mall_tc_entry)
- return;
- list_del(&mall_tc_entry->list);
- switch (mall_tc_entry->type) {
- case DSA_PORT_MALL_MIRROR:
- if (ds->ops->port_mirror_del)
- ds->ops->port_mirror_del(ds, dp->index,
- &mall_tc_entry->mirror);
- break;
- case DSA_PORT_MALL_POLICER:
- if (ds->ops->port_policer_del)
- ds->ops->port_policer_del(ds, dp->index);
- break;
- default:
- WARN_ON(1);
- }
- kfree(mall_tc_entry);
- }
- static int dsa_slave_setup_tc_cls_matchall(struct net_device *dev,
- struct tc_cls_matchall_offload *cls,
- bool ingress)
- {
- if (cls->common.chain_index)
- return -EOPNOTSUPP;
- switch (cls->command) {
- case TC_CLSMATCHALL_REPLACE:
- return dsa_slave_add_cls_matchall(dev, cls, ingress);
- case TC_CLSMATCHALL_DESTROY:
- dsa_slave_del_cls_matchall(dev, cls);
- return 0;
- default:
- return -EOPNOTSUPP;
- }
- }
- static int dsa_slave_add_cls_flower(struct net_device *dev,
- struct flow_cls_offload *cls,
- bool ingress)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- int port = dp->index;
- if (!ds->ops->cls_flower_add)
- return -EOPNOTSUPP;
- return ds->ops->cls_flower_add(ds, port, cls, ingress);
- }
- static int dsa_slave_del_cls_flower(struct net_device *dev,
- struct flow_cls_offload *cls,
- bool ingress)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- int port = dp->index;
- if (!ds->ops->cls_flower_del)
- return -EOPNOTSUPP;
- return ds->ops->cls_flower_del(ds, port, cls, ingress);
- }
- static int dsa_slave_stats_cls_flower(struct net_device *dev,
- struct flow_cls_offload *cls,
- bool ingress)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- int port = dp->index;
- if (!ds->ops->cls_flower_stats)
- return -EOPNOTSUPP;
- return ds->ops->cls_flower_stats(ds, port, cls, ingress);
- }
- static int dsa_slave_setup_tc_cls_flower(struct net_device *dev,
- struct flow_cls_offload *cls,
- bool ingress)
- {
- switch (cls->command) {
- case FLOW_CLS_REPLACE:
- return dsa_slave_add_cls_flower(dev, cls, ingress);
- case FLOW_CLS_DESTROY:
- return dsa_slave_del_cls_flower(dev, cls, ingress);
- case FLOW_CLS_STATS:
- return dsa_slave_stats_cls_flower(dev, cls, ingress);
- default:
- return -EOPNOTSUPP;
- }
- }
- static int dsa_slave_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
- void *cb_priv, bool ingress)
- {
- struct net_device *dev = cb_priv;
- if (!tc_can_offload(dev))
- return -EOPNOTSUPP;
- switch (type) {
- case TC_SETUP_CLSMATCHALL:
- return dsa_slave_setup_tc_cls_matchall(dev, type_data, ingress);
- case TC_SETUP_CLSFLOWER:
- return dsa_slave_setup_tc_cls_flower(dev, type_data, ingress);
- default:
- return -EOPNOTSUPP;
- }
- }
- static int dsa_slave_setup_tc_block_cb_ig(enum tc_setup_type type,
- void *type_data, void *cb_priv)
- {
- return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, true);
- }
- static int dsa_slave_setup_tc_block_cb_eg(enum tc_setup_type type,
- void *type_data, void *cb_priv)
- {
- return dsa_slave_setup_tc_block_cb(type, type_data, cb_priv, false);
- }
- static LIST_HEAD(dsa_slave_block_cb_list);
- static int dsa_slave_setup_tc_block(struct net_device *dev,
- struct flow_block_offload *f)
- {
- struct flow_block_cb *block_cb;
- flow_setup_cb_t *cb;
- if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
- cb = dsa_slave_setup_tc_block_cb_ig;
- else if (f->binder_type == FLOW_BLOCK_BINDER_TYPE_CLSACT_EGRESS)
- cb = dsa_slave_setup_tc_block_cb_eg;
- else
- return -EOPNOTSUPP;
- f->driver_block_list = &dsa_slave_block_cb_list;
- switch (f->command) {
- case FLOW_BLOCK_BIND:
- if (flow_block_cb_is_busy(cb, dev, &dsa_slave_block_cb_list))
- return -EBUSY;
- block_cb = flow_block_cb_alloc(cb, dev, dev, NULL);
- if (IS_ERR(block_cb))
- return PTR_ERR(block_cb);
- flow_block_cb_add(block_cb, f);
- list_add_tail(&block_cb->driver_list, &dsa_slave_block_cb_list);
- return 0;
- case FLOW_BLOCK_UNBIND:
- block_cb = flow_block_cb_lookup(f->block, cb, dev);
- if (!block_cb)
- return -ENOENT;
- flow_block_cb_remove(block_cb, f);
- list_del(&block_cb->driver_list);
- return 0;
- default:
- return -EOPNOTSUPP;
- }
- }
- static int dsa_slave_setup_tc(struct net_device *dev, enum tc_setup_type type,
- void *type_data)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- if (type == TC_SETUP_BLOCK)
- return dsa_slave_setup_tc_block(dev, type_data);
- if (!ds->ops->port_setup_tc)
- return -EOPNOTSUPP;
- return ds->ops->port_setup_tc(ds, dp->index, type, type_data);
- }
- static void dsa_slave_get_stats64(struct net_device *dev,
- struct rtnl_link_stats64 *stats)
- {
- struct dsa_slave_priv *p = netdev_priv(dev);
- netdev_stats_to_stats64(stats, &dev->stats);
- dev_fetch_sw_netstats(stats, p->stats64);
- }
- static int dsa_slave_get_rxnfc(struct net_device *dev,
- struct ethtool_rxnfc *nfc, u32 *rule_locs)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- if (!ds->ops->get_rxnfc)
- return -EOPNOTSUPP;
- return ds->ops->get_rxnfc(ds, dp->index, nfc, rule_locs);
- }
- static int dsa_slave_set_rxnfc(struct net_device *dev,
- struct ethtool_rxnfc *nfc)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_switch *ds = dp->ds;
- if (!ds->ops->set_rxnfc)
- return -EOPNOTSUPP;
- return ds->ops->set_rxnfc(ds, dp->index, nfc);
- }
- static int dsa_slave_get_ts_info(struct net_device *dev,
- struct ethtool_ts_info *ts)
- {
- struct dsa_slave_priv *p = netdev_priv(dev);
- struct dsa_switch *ds = p->dp->ds;
- if (!ds->ops->get_ts_info)
- return -EOPNOTSUPP;
- return ds->ops->get_ts_info(ds, p->dp->index, ts);
- }
- 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,
- .vid_begin = vid,
- .vid_end = vid,
- /* This API only allows programming tagged, non-PVID VIDs */
- .flags = 0,
- };
- struct switchdev_trans trans;
- int ret;
- /* User port... */
- trans.ph_prepare = true;
- ret = dsa_port_vlan_add(dp, &vlan, &trans);
- if (ret)
- return ret;
- trans.ph_prepare = false;
- ret = dsa_port_vlan_add(dp, &vlan, &trans);
- if (ret)
- return ret;
- /* And CPU port... */
- trans.ph_prepare = true;
- ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &trans);
- if (ret)
- return ret;
- trans.ph_prepare = false;
- ret = dsa_port_vlan_add(dp->cpu_dp, &vlan, &trans);
- if (ret)
- return ret;
- return vlan_vid_add(master, proto, vid);
- }
- 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_begin = vid,
- .vid_end = vid,
- /* This API only allows programming tagged, non-PVID VIDs */
- .flags = 0,
- };
- 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;
- }
- struct dsa_hw_port {
- struct list_head list;
- struct net_device *dev;
- int old_mtu;
- };
- static int dsa_hw_port_list_set_mtu(struct list_head *hw_port_list, int mtu)
- {
- const struct dsa_hw_port *p;
- int err;
- list_for_each_entry(p, hw_port_list, list) {
- if (p->dev->mtu == mtu)
- continue;
- err = dev_set_mtu(p->dev, mtu);
- if (err)
- goto rollback;
- }
- return 0;
- rollback:
- list_for_each_entry_continue_reverse(p, hw_port_list, list) {
- if (p->dev->mtu == p->old_mtu)
- continue;
- if (dev_set_mtu(p->dev, p->old_mtu))
- netdev_err(p->dev, "Failed to restore MTU\n");
- }
- return err;
- }
- static void dsa_hw_port_list_free(struct list_head *hw_port_list)
- {
- struct dsa_hw_port *p, *n;
- list_for_each_entry_safe(p, n, hw_port_list, list)
- kfree(p);
- }
- /* Make the hardware datapath to/from @dev limited to a common MTU */
- static void dsa_bridge_mtu_normalization(struct dsa_port *dp)
- {
- struct list_head hw_port_list;
- struct dsa_switch_tree *dst;
- int min_mtu = ETH_MAX_MTU;
- struct dsa_port *other_dp;
- int err;
- if (!dp->ds->mtu_enforcement_ingress)
- return;
- if (!dp->bridge_dev)
- return;
- INIT_LIST_HEAD(&hw_port_list);
- /* Populate the list of ports that are part of the same bridge
- * as the newly added/modified port
- */
- list_for_each_entry(dst, &dsa_tree_list, list) {
- list_for_each_entry(other_dp, &dst->ports, list) {
- struct dsa_hw_port *hw_port;
- struct net_device *slave;
- if (other_dp->type != DSA_PORT_TYPE_USER)
- continue;
- if (other_dp->bridge_dev != dp->bridge_dev)
- continue;
- if (!other_dp->ds->mtu_enforcement_ingress)
- continue;
- slave = other_dp->slave;
- if (min_mtu > slave->mtu)
- min_mtu = slave->mtu;
- hw_port = kzalloc(sizeof(*hw_port), GFP_KERNEL);
- if (!hw_port)
- goto out;
- hw_port->dev = slave;
- hw_port->old_mtu = slave->mtu;
- list_add(&hw_port->list, &hw_port_list);
- }
- }
- /* Attempt to configure the entire hardware bridge to the newly added
- * interface's MTU first, regardless of whether the intention of the
- * user was to raise or lower it.
- */
- err = dsa_hw_port_list_set_mtu(&hw_port_list, dp->slave->mtu);
- if (!err)
- goto out;
- /* Clearly that didn't work out so well, so just set the minimum MTU on
- * all hardware bridge ports now. If this fails too, then all ports will
- * still have their old MTU rolled back anyway.
- */
- dsa_hw_port_list_set_mtu(&hw_port_list, min_mtu);
- out:
- dsa_hw_port_list_free(&hw_port_list);
- }
- static int dsa_slave_change_mtu(struct net_device *dev, int new_mtu)
- {
- struct net_device *master = dsa_slave_to_master(dev);
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_slave_priv *p = netdev_priv(dev);
- struct dsa_switch *ds = p->dp->ds;
- struct dsa_port *cpu_dp;
- int port = p->dp->index;
- int largest_mtu = 0;
- int new_master_mtu;
- int old_master_mtu;
- int mtu_limit;
- int cpu_mtu;
- int err, i;
- if (!ds->ops->port_change_mtu)
- return -EOPNOTSUPP;
- for (i = 0; i < ds->num_ports; i++) {
- int slave_mtu;
- if (!dsa_is_user_port(ds, i))
- continue;
- /* During probe, this function will be called for each slave
- * device, while not all of them have been allocated. That's
- * ok, it doesn't change what the maximum is, so ignore it.
- */
- if (!dsa_to_port(ds, i)->slave)
- continue;
- /* Pretend that we already applied the setting, which we
- * actually haven't (still haven't done all integrity checks)
- */
- if (i == port)
- slave_mtu = new_mtu;
- else
- slave_mtu = dsa_to_port(ds, i)->slave->mtu;
- if (largest_mtu < slave_mtu)
- largest_mtu = slave_mtu;
- }
- cpu_dp = dsa_to_port(ds, port)->cpu_dp;
- mtu_limit = min_t(int, master->max_mtu, dev->max_mtu);
- old_master_mtu = master->mtu;
- new_master_mtu = largest_mtu + cpu_dp->tag_ops->overhead;
- if (new_master_mtu > mtu_limit)
- return -ERANGE;
- /* If the master MTU isn't over limit, there's no need to check the CPU
- * MTU, since that surely isn't either.
- */
- cpu_mtu = largest_mtu;
- /* Start applying stuff */
- if (new_master_mtu != old_master_mtu) {
- err = dev_set_mtu(master, new_master_mtu);
- if (err < 0)
- goto out_master_failed;
- /* We only need to propagate the MTU of the CPU port to
- * upstream switches.
- */
- err = dsa_port_mtu_change(cpu_dp, cpu_mtu, true);
- if (err)
- goto out_cpu_failed;
- }
- err = dsa_port_mtu_change(dp, new_mtu, false);
- if (err)
- goto out_port_failed;
- dev->mtu = new_mtu;
- dsa_bridge_mtu_normalization(dp);
- return 0;
- out_port_failed:
- if (new_master_mtu != old_master_mtu)
- dsa_port_mtu_change(cpu_dp, old_master_mtu -
- cpu_dp->tag_ops->overhead,
- true);
- out_cpu_failed:
- if (new_master_mtu != old_master_mtu)
- dev_set_mtu(master, old_master_mtu);
- out_master_failed:
- return err;
- }
- static const struct ethtool_ops dsa_slave_ethtool_ops = {
- .get_drvinfo = dsa_slave_get_drvinfo,
- .get_regs_len = dsa_slave_get_regs_len,
- .get_regs = dsa_slave_get_regs,
- .nway_reset = dsa_slave_nway_reset,
- .get_link = ethtool_op_get_link,
- .get_eeprom_len = dsa_slave_get_eeprom_len,
- .get_eeprom = dsa_slave_get_eeprom,
- .set_eeprom = dsa_slave_set_eeprom,
- .get_strings = dsa_slave_get_strings,
- .get_ethtool_stats = dsa_slave_get_ethtool_stats,
- .get_sset_count = dsa_slave_get_sset_count,
- .set_wol = dsa_slave_set_wol,
- .get_wol = dsa_slave_get_wol,
- .set_eee = dsa_slave_set_eee,
- .get_eee = dsa_slave_get_eee,
- .get_link_ksettings = dsa_slave_get_link_ksettings,
- .set_link_ksettings = dsa_slave_set_link_ksettings,
- .get_pauseparam = dsa_slave_get_pauseparam,
- .set_pauseparam = dsa_slave_set_pauseparam,
- .get_rxnfc = dsa_slave_get_rxnfc,
- .set_rxnfc = dsa_slave_set_rxnfc,
- .get_ts_info = dsa_slave_get_ts_info,
- };
- /* legacy way, bypassing the bridge *****************************************/
- int dsa_legacy_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
- struct net_device *dev,
- const unsigned char *addr, u16 vid,
- u16 flags,
- struct netlink_ext_ack *extack)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- return dsa_port_fdb_add(dp, addr, vid);
- }
- int dsa_legacy_fdb_del(struct ndmsg *ndm, struct nlattr *tb[],
- struct net_device *dev,
- const unsigned char *addr, u16 vid)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- return dsa_port_fdb_del(dp, addr, vid);
- }
- static struct devlink_port *dsa_slave_get_devlink_port(struct net_device *dev)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- return dp->ds->devlink ? &dp->devlink_port : NULL;
- }
- static const struct net_device_ops dsa_slave_netdev_ops = {
- .ndo_open = dsa_slave_open,
- .ndo_stop = dsa_slave_close,
- .ndo_start_xmit = dsa_slave_xmit,
- .ndo_change_rx_flags = dsa_slave_change_rx_flags,
- .ndo_set_rx_mode = dsa_slave_set_rx_mode,
- .ndo_set_mac_address = dsa_slave_set_mac_address,
- .ndo_fdb_add = dsa_legacy_fdb_add,
- .ndo_fdb_del = dsa_legacy_fdb_del,
- .ndo_fdb_dump = dsa_slave_fdb_dump,
- .ndo_do_ioctl = dsa_slave_ioctl,
- .ndo_get_iflink = dsa_slave_get_iflink,
- #ifdef CONFIG_NET_POLL_CONTROLLER
- .ndo_netpoll_setup = dsa_slave_netpoll_setup,
- .ndo_netpoll_cleanup = dsa_slave_netpoll_cleanup,
- .ndo_poll_controller = dsa_slave_poll_controller,
- #endif
- .ndo_get_phys_port_name = dsa_slave_get_phys_port_name,
- .ndo_setup_tc = dsa_slave_setup_tc,
- .ndo_get_stats64 = dsa_slave_get_stats64,
- .ndo_get_port_parent_id = dsa_slave_get_port_parent_id,
- .ndo_vlan_rx_add_vid = dsa_slave_vlan_rx_add_vid,
- .ndo_vlan_rx_kill_vid = dsa_slave_vlan_rx_kill_vid,
- .ndo_get_devlink_port = dsa_slave_get_devlink_port,
- .ndo_change_mtu = dsa_slave_change_mtu,
- };
- static struct device_type dsa_type = {
- .name = "dsa",
- };
- void dsa_port_phylink_mac_change(struct dsa_switch *ds, int port, bool up)
- {
- const struct dsa_port *dp = dsa_to_port(ds, port);
- if (dp->pl)
- phylink_mac_change(dp->pl, up);
- }
- EXPORT_SYMBOL_GPL(dsa_port_phylink_mac_change);
- static void dsa_slave_phylink_fixed_state(struct phylink_config *config,
- struct phylink_link_state *state)
- {
- struct dsa_port *dp = container_of(config, struct dsa_port, pl_config);
- struct dsa_switch *ds = dp->ds;
- /* No need to check that this operation is valid, the callback would
- * not be called if it was not.
- */
- ds->ops->phylink_fixed_state(ds, dp->index, state);
- }
- /* slave device setup *******************************************************/
- static int dsa_slave_phy_connect(struct net_device *slave_dev, int addr)
- {
- struct dsa_port *dp = dsa_slave_to_port(slave_dev);
- struct dsa_switch *ds = dp->ds;
- slave_dev->phydev = mdiobus_get_phy(ds->slave_mii_bus, addr);
- if (!slave_dev->phydev) {
- netdev_err(slave_dev, "no phy at %d\n", addr);
- return -ENODEV;
- }
- return phylink_connect_phy(dp->pl, slave_dev->phydev);
- }
- static int dsa_slave_phy_setup(struct net_device *slave_dev)
- {
- struct dsa_port *dp = dsa_slave_to_port(slave_dev);
- struct device_node *port_dn = dp->dn;
- struct dsa_switch *ds = dp->ds;
- phy_interface_t mode;
- u32 phy_flags = 0;
- int ret;
- ret = of_get_phy_mode(port_dn, &mode);
- if (ret)
- mode = PHY_INTERFACE_MODE_NA;
- dp->pl_config.dev = &slave_dev->dev;
- dp->pl_config.type = PHYLINK_NETDEV;
- /* The get_fixed_state callback takes precedence over polling the
- * link GPIO in PHYLINK (see phylink_get_fixed_state). Only set
- * this if the switch provides such a callback.
- */
- if (ds->ops->phylink_fixed_state) {
- dp->pl_config.get_fixed_state = dsa_slave_phylink_fixed_state;
- dp->pl_config.poll_fixed_state = true;
- }
- dp->pl = phylink_create(&dp->pl_config, of_fwnode_handle(port_dn), mode,
- &dsa_port_phylink_mac_ops);
- if (IS_ERR(dp->pl)) {
- netdev_err(slave_dev,
- "error creating PHYLINK: %ld\n", PTR_ERR(dp->pl));
- return PTR_ERR(dp->pl);
- }
- if (ds->ops->get_phy_flags)
- phy_flags = ds->ops->get_phy_flags(ds, dp->index);
- ret = phylink_of_phy_connect(dp->pl, port_dn, phy_flags);
- if (ret == -ENODEV && ds->slave_mii_bus) {
- /* We could not connect to a designated PHY or SFP, so try to
- * use the switch internal MDIO bus instead
- */
- ret = dsa_slave_phy_connect(slave_dev, dp->index);
- }
- if (ret) {
- netdev_err(slave_dev, "failed to connect to PHY: %pe\n",
- ERR_PTR(ret));
- phylink_destroy(dp->pl);
- }
- return ret;
- }
- static struct lock_class_key dsa_slave_netdev_xmit_lock_key;
- static void dsa_slave_set_lockdep_class_one(struct net_device *dev,
- struct netdev_queue *txq,
- void *_unused)
- {
- lockdep_set_class(&txq->_xmit_lock,
- &dsa_slave_netdev_xmit_lock_key);
- }
- int dsa_slave_suspend(struct net_device *slave_dev)
- {
- struct dsa_port *dp = dsa_slave_to_port(slave_dev);
- if (!netif_running(slave_dev))
- return 0;
- netif_device_detach(slave_dev);
- rtnl_lock();
- phylink_stop(dp->pl);
- rtnl_unlock();
- return 0;
- }
- int dsa_slave_resume(struct net_device *slave_dev)
- {
- struct dsa_port *dp = dsa_slave_to_port(slave_dev);
- if (!netif_running(slave_dev))
- return 0;
- netif_device_attach(slave_dev);
- rtnl_lock();
- phylink_start(dp->pl);
- rtnl_unlock();
- return 0;
- }
- static void dsa_slave_notify(struct net_device *dev, unsigned long val)
- {
- struct net_device *master = dsa_slave_to_master(dev);
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct dsa_notifier_register_info rinfo = {
- .switch_number = dp->ds->index,
- .port_number = dp->index,
- .master = master,
- .info.dev = dev,
- };
- call_dsa_notifiers(val, dev, &rinfo.info);
- }
- int dsa_slave_create(struct dsa_port *port)
- {
- const struct dsa_port *cpu_dp = port->cpu_dp;
- struct net_device *master = cpu_dp->master;
- struct dsa_switch *ds = port->ds;
- const char *name = port->name;
- struct net_device *slave_dev;
- struct dsa_slave_priv *p;
- int ret;
- if (!ds->num_tx_queues)
- ds->num_tx_queues = 1;
- slave_dev = alloc_netdev_mqs(sizeof(struct dsa_slave_priv), name,
- NET_NAME_UNKNOWN, ether_setup,
- ds->num_tx_queues, 1);
- if (slave_dev == NULL)
- return -ENOMEM;
- slave_dev->features = master->vlan_features | NETIF_F_HW_TC;
- if (ds->ops->port_vlan_add && ds->ops->port_vlan_del)
- slave_dev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
- slave_dev->hw_features |= NETIF_F_HW_TC;
- slave_dev->features |= NETIF_F_LLTX;
- slave_dev->ethtool_ops = &dsa_slave_ethtool_ops;
- if (!IS_ERR_OR_NULL(port->mac))
- ether_addr_copy(slave_dev->dev_addr, port->mac);
- else
- eth_hw_addr_inherit(slave_dev, master);
- slave_dev->priv_flags |= IFF_NO_QUEUE;
- slave_dev->netdev_ops = &dsa_slave_netdev_ops;
- if (ds->ops->port_max_mtu)
- slave_dev->max_mtu = ds->ops->port_max_mtu(ds, port->index);
- if (cpu_dp->tag_ops->tail_tag)
- slave_dev->needed_tailroom = cpu_dp->tag_ops->overhead;
- else
- slave_dev->needed_headroom = cpu_dp->tag_ops->overhead;
- /* Try to save one extra realloc later in the TX path (in the master)
- * by also inheriting the master's needed headroom and tailroom.
- * The 8021q driver also does this.
- */
- slave_dev->needed_headroom += master->needed_headroom;
- slave_dev->needed_tailroom += master->needed_tailroom;
- SET_NETDEV_DEVTYPE(slave_dev, &dsa_type);
- netdev_for_each_tx_queue(slave_dev, dsa_slave_set_lockdep_class_one,
- NULL);
- SET_NETDEV_DEV(slave_dev, port->ds->dev);
- slave_dev->dev.of_node = port->dn;
- slave_dev->vlan_features = master->vlan_features;
- p = netdev_priv(slave_dev);
- p->stats64 = netdev_alloc_pcpu_stats(struct pcpu_sw_netstats);
- if (!p->stats64) {
- free_netdev(slave_dev);
- return -ENOMEM;
- }
- ret = gro_cells_init(&p->gcells, slave_dev);
- if (ret)
- goto out_free;
- p->dp = port;
- INIT_LIST_HEAD(&p->mall_tc_list);
- p->xmit = cpu_dp->tag_ops->xmit;
- port->slave = slave_dev;
- rtnl_lock();
- ret = dsa_slave_change_mtu(slave_dev, ETH_DATA_LEN);
- rtnl_unlock();
- if (ret && ret != -EOPNOTSUPP)
- dev_warn(ds->dev, "nonfatal error %d setting MTU on port %d\n",
- ret, port->index);
- netif_carrier_off(slave_dev);
- ret = dsa_slave_phy_setup(slave_dev);
- if (ret) {
- netdev_err(slave_dev,
- "error %d setting up PHY for tree %d, switch %d, port %d\n",
- ret, ds->dst->index, ds->index, port->index);
- goto out_gcells;
- }
- dsa_slave_notify(slave_dev, DSA_PORT_REGISTER);
- rtnl_lock();
- ret = register_netdevice(slave_dev);
- if (ret) {
- netdev_err(master, "error %d registering interface %s\n",
- ret, slave_dev->name);
- rtnl_unlock();
- goto out_phy;
- }
- ret = netdev_upper_dev_link(master, slave_dev, NULL);
- rtnl_unlock();
- if (ret)
- goto out_unregister;
- return 0;
- out_unregister:
- unregister_netdev(slave_dev);
- out_phy:
- rtnl_lock();
- phylink_disconnect_phy(p->dp->pl);
- rtnl_unlock();
- phylink_destroy(p->dp->pl);
- out_gcells:
- gro_cells_destroy(&p->gcells);
- out_free:
- free_percpu(p->stats64);
- free_netdev(slave_dev);
- port->slave = NULL;
- return ret;
- }
- void dsa_slave_destroy(struct net_device *slave_dev)
- {
- struct net_device *master = dsa_slave_to_master(slave_dev);
- struct dsa_port *dp = dsa_slave_to_port(slave_dev);
- struct dsa_slave_priv *p = netdev_priv(slave_dev);
- netif_carrier_off(slave_dev);
- rtnl_lock();
- netdev_upper_dev_unlink(master, slave_dev);
- unregister_netdevice(slave_dev);
- phylink_disconnect_phy(dp->pl);
- rtnl_unlock();
- dsa_slave_notify(slave_dev, DSA_PORT_UNREGISTER);
- phylink_destroy(dp->pl);
- gro_cells_destroy(&p->gcells);
- free_percpu(p->stats64);
- free_netdev(slave_dev);
- }
- bool dsa_slave_dev_check(const struct net_device *dev)
- {
- return dev->netdev_ops == &dsa_slave_netdev_ops;
- }
- static int dsa_slave_changeupper(struct net_device *dev,
- struct netdev_notifier_changeupper_info *info)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- int err = NOTIFY_DONE;
- if (netif_is_bridge_master(info->upper_dev)) {
- if (info->linking) {
- err = dsa_port_bridge_join(dp, info->upper_dev);
- if (!err)
- dsa_bridge_mtu_normalization(dp);
- err = notifier_from_errno(err);
- } else {
- dsa_port_bridge_leave(dp, info->upper_dev);
- err = NOTIFY_OK;
- }
- }
- return err;
- }
- static int
- dsa_prevent_bridging_8021q_upper(struct net_device *dev,
- struct netdev_notifier_changeupper_info *info)
- {
- struct netlink_ext_ack *ext_ack;
- struct net_device *slave;
- struct dsa_port *dp;
- ext_ack = netdev_notifier_info_to_extack(&info->info);
- if (!is_vlan_dev(dev))
- return NOTIFY_DONE;
- slave = vlan_dev_real_dev(dev);
- if (!dsa_slave_dev_check(slave))
- return NOTIFY_DONE;
- dp = dsa_slave_to_port(slave);
- if (!dp->bridge_dev)
- return NOTIFY_DONE;
- /* Deny enslaving a VLAN device into a VLAN-aware bridge */
- if (br_vlan_enabled(dp->bridge_dev) &&
- netif_is_bridge_master(info->upper_dev) && info->linking) {
- NL_SET_ERR_MSG_MOD(ext_ack,
- "Cannot enslave VLAN device into VLAN aware bridge");
- return notifier_from_errno(-EINVAL);
- }
- return NOTIFY_DONE;
- }
- static int
- dsa_slave_check_8021q_upper(struct net_device *dev,
- struct netdev_notifier_changeupper_info *info)
- {
- struct dsa_port *dp = dsa_slave_to_port(dev);
- struct net_device *br = dp->bridge_dev;
- struct bridge_vlan_info br_info;
- struct netlink_ext_ack *extack;
- int err = NOTIFY_DONE;
- u16 vid;
- if (!br || !br_vlan_enabled(br))
- return NOTIFY_DONE;
- extack = netdev_notifier_info_to_extack(&info->info);
- vid = vlan_dev_vlan_id(info->upper_dev);
- /* br_vlan_get_info() returns -EINVAL or -ENOENT if the
- * device, respectively the VID is not found, returning
- * 0 means success, which is a failure for us here.
- */
- err = br_vlan_get_info(br, vid, &br_info);
- if (err == 0) {
- NL_SET_ERR_MSG_MOD(extack,
- "This VLAN is already configured by the bridge");
- return notifier_from_errno(-EBUSY);
- }
- return NOTIFY_DONE;
- }
- static int dsa_slave_netdevice_event(struct notifier_block *nb,
- unsigned long event, void *ptr)
- {
- struct net_device *dev = netdev_notifier_info_to_dev(ptr);
- switch (event) {
- case NETDEV_PRECHANGEUPPER: {
- struct netdev_notifier_changeupper_info *info = ptr;
- if (!dsa_slave_dev_check(dev))
- return dsa_prevent_bridging_8021q_upper(dev, ptr);
- if (is_vlan_dev(info->upper_dev))
- return dsa_slave_check_8021q_upper(dev, ptr);
- break;
- }
- case NETDEV_CHANGEUPPER:
- if (!dsa_slave_dev_check(dev))
- return NOTIFY_DONE;
- return dsa_slave_changeupper(dev, ptr);
- }
- return NOTIFY_DONE;
- }
- struct dsa_switchdev_event_work {
- struct work_struct work;
- struct switchdev_notifier_fdb_info fdb_info;
- struct net_device *dev;
- unsigned long event;
- };
- static void dsa_slave_switchdev_event_work(struct work_struct *work)
- {
- struct dsa_switchdev_event_work *switchdev_work =
- container_of(work, struct dsa_switchdev_event_work, work);
- struct net_device *dev = switchdev_work->dev;
- struct switchdev_notifier_fdb_info *fdb_info;
- struct dsa_port *dp = dsa_slave_to_port(dev);
- int err;
- rtnl_lock();
- switch (switchdev_work->event) {
- case SWITCHDEV_FDB_ADD_TO_DEVICE:
- fdb_info = &switchdev_work->fdb_info;
- if (!fdb_info->added_by_user)
- break;
- err = dsa_port_fdb_add(dp, fdb_info->addr, fdb_info->vid);
- if (err) {
- netdev_dbg(dev, "fdb add failed err=%d\n", err);
- break;
- }
- fdb_info->offloaded = true;
- call_switchdev_notifiers(SWITCHDEV_FDB_OFFLOADED, dev,
- &fdb_info->info, NULL);
- break;
- case SWITCHDEV_FDB_DEL_TO_DEVICE:
- fdb_info = &switchdev_work->fdb_info;
- if (!fdb_info->added_by_user)
- break;
- err = dsa_port_fdb_del(dp, fdb_info->addr, fdb_info->vid);
- if (err) {
- netdev_dbg(dev, "fdb del failed err=%d\n", err);
- dev_close(dev);
- }
- break;
- }
- rtnl_unlock();
- kfree(switchdev_work->fdb_info.addr);
- kfree(switchdev_work);
- dev_put(dev);
- }
- static int
- dsa_slave_switchdev_fdb_work_init(struct dsa_switchdev_event_work *
- switchdev_work,
- const struct switchdev_notifier_fdb_info *
- fdb_info)
- {
- memcpy(&switchdev_work->fdb_info, fdb_info,
- sizeof(switchdev_work->fdb_info));
- switchdev_work->fdb_info.addr = kzalloc(ETH_ALEN, GFP_ATOMIC);
- if (!switchdev_work->fdb_info.addr)
- return -ENOMEM;
- ether_addr_copy((u8 *)switchdev_work->fdb_info.addr,
- fdb_info->addr);
- return 0;
- }
- /* Called under rcu_read_lock() */
- static int dsa_slave_switchdev_event(struct notifier_block *unused,
- unsigned long event, void *ptr)
- {
- struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
- struct dsa_switchdev_event_work *switchdev_work;
- int err;
- if (event == SWITCHDEV_PORT_ATTR_SET) {
- err = switchdev_handle_port_attr_set(dev, ptr,
- dsa_slave_dev_check,
- dsa_slave_port_attr_set);
- return notifier_from_errno(err);
- }
- if (!dsa_slave_dev_check(dev))
- return NOTIFY_DONE;
- switchdev_work = kzalloc(sizeof(*switchdev_work), GFP_ATOMIC);
- if (!switchdev_work)
- return NOTIFY_BAD;
- INIT_WORK(&switchdev_work->work,
- dsa_slave_switchdev_event_work);
- switchdev_work->dev = dev;
- switchdev_work->event = event;
- switch (event) {
- case SWITCHDEV_FDB_ADD_TO_DEVICE:
- case SWITCHDEV_FDB_DEL_TO_DEVICE:
- if (dsa_slave_switchdev_fdb_work_init(switchdev_work, ptr))
- goto err_fdb_work_init;
- dev_hold(dev);
- break;
- default:
- kfree(switchdev_work);
- return NOTIFY_DONE;
- }
- dsa_schedule_work(&switchdev_work->work);
- return NOTIFY_OK;
- err_fdb_work_init:
- kfree(switchdev_work);
- return NOTIFY_BAD;
- }
- static int dsa_slave_switchdev_blocking_event(struct notifier_block *unused,
- unsigned long event, void *ptr)
- {
- struct net_device *dev = switchdev_notifier_info_to_dev(ptr);
- int err;
- switch (event) {
- case SWITCHDEV_PORT_OBJ_ADD:
- err = switchdev_handle_port_obj_add(dev, ptr,
- dsa_slave_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);
- return notifier_from_errno(err);
- case SWITCHDEV_PORT_ATTR_SET:
- err = switchdev_handle_port_attr_set(dev, ptr,
- dsa_slave_dev_check,
- dsa_slave_port_attr_set);
- return notifier_from_errno(err);
- }
- return NOTIFY_DONE;
- }
- static struct notifier_block dsa_slave_nb __read_mostly = {
- .notifier_call = dsa_slave_netdevice_event,
- };
- static struct notifier_block dsa_slave_switchdev_notifier = {
- .notifier_call = dsa_slave_switchdev_event,
- };
- static struct notifier_block dsa_slave_switchdev_blocking_notifier = {
- .notifier_call = dsa_slave_switchdev_blocking_event,
- };
- int dsa_slave_register_notifier(void)
- {
- struct notifier_block *nb;
- int err;
- err = register_netdevice_notifier(&dsa_slave_nb);
- if (err)
- return err;
- err = register_switchdev_notifier(&dsa_slave_switchdev_notifier);
- if (err)
- goto err_switchdev_nb;
- nb = &dsa_slave_switchdev_blocking_notifier;
- err = register_switchdev_blocking_notifier(nb);
- if (err)
- goto err_switchdev_blocking_nb;
- return 0;
- err_switchdev_blocking_nb:
- unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
- err_switchdev_nb:
- unregister_netdevice_notifier(&dsa_slave_nb);
- return err;
- }
- void dsa_slave_unregister_notifier(void)
- {
- struct notifier_block *nb;
- int err;
- nb = &dsa_slave_switchdev_blocking_notifier;
- err = unregister_switchdev_blocking_notifier(nb);
- if (err)
- pr_err("DSA: failed to unregister switchdev blocking notifier (%d)\n", err);
- err = unregister_switchdev_notifier(&dsa_slave_switchdev_notifier);
- if (err)
- pr_err("DSA: failed to unregister switchdev notifier (%d)\n", err);
- err = unregister_netdevice_notifier(&dsa_slave_nb);
- if (err)
- pr_err("DSA: failed to unregister slave notifier (%d)\n", err);
- }
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