| // SPDX-License-Identifier: GPL-2.0-or-later |
| /* -*- linux-c -*- |
| * INET 802.1Q VLAN |
| * Ethernet-type device handling. |
| * |
| * Authors: Ben Greear <greearb@candelatech.com> |
| * Please send support related email to: netdev@vger.kernel.org |
| * VLAN Home Page: http://www.candelatech.com/~greear/vlan.html |
| * |
| * Fixes: Mar 22 2001: Martin Bokaemper <mbokaemper@unispherenetworks.com> |
| * - reset skb->pkt_type on incoming packets when MAC was changed |
| * - see that changed MAC is saddr for outgoing packets |
| * Oct 20, 2001: Ard van Breeman: |
| * - Fix MC-list, finally. |
| * - Flush MC-list on VLAN destroy. |
| */ |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/module.h> |
| #include <linux/slab.h> |
| #include <linux/skbuff.h> |
| #include <linux/netdevice.h> |
| #include <linux/net_tstamp.h> |
| #include <linux/etherdevice.h> |
| #include <linux/ethtool.h> |
| #include <linux/phy.h> |
| #include <net/arp.h> |
| |
| #include "vlan.h" |
| #include "vlanproc.h" |
| #include <linux/if_vlan.h> |
| #include <linux/netpoll.h> |
| |
| /* |
| * Create the VLAN header for an arbitrary protocol layer |
| * |
| * saddr=NULL means use device source address |
| * daddr=NULL means leave destination address (eg unresolved arp) |
| * |
| * This is called when the SKB is moving down the stack towards the |
| * physical devices. |
| */ |
| static int vlan_dev_hard_header(struct sk_buff *skb, struct net_device *dev, |
| unsigned short type, |
| const void *daddr, const void *saddr, |
| unsigned int len) |
| { |
| struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
| struct vlan_hdr *vhdr; |
| unsigned int vhdrlen = 0; |
| u16 vlan_tci = 0; |
| int rc; |
| |
| if (!(vlan->flags & VLAN_FLAG_REORDER_HDR)) { |
| vhdr = skb_push(skb, VLAN_HLEN); |
| |
| vlan_tci = vlan->vlan_id; |
| vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); |
| vhdr->h_vlan_TCI = htons(vlan_tci); |
| |
| /* |
| * Set the protocol type. For a packet of type ETH_P_802_3/2 we |
| * put the length in here instead. |
| */ |
| if (type != ETH_P_802_3 && type != ETH_P_802_2) |
| vhdr->h_vlan_encapsulated_proto = htons(type); |
| else |
| vhdr->h_vlan_encapsulated_proto = htons(len); |
| |
| skb->protocol = vlan->vlan_proto; |
| type = ntohs(vlan->vlan_proto); |
| vhdrlen = VLAN_HLEN; |
| } |
| |
| /* Before delegating work to the lower layer, enter our MAC-address */ |
| if (saddr == NULL) |
| saddr = dev->dev_addr; |
| |
| /* Now make the underlying real hard header */ |
| dev = vlan->real_dev; |
| rc = dev_hard_header(skb, dev, type, daddr, saddr, len + vhdrlen); |
| if (rc > 0) |
| rc += vhdrlen; |
| return rc; |
| } |
| |
| static inline netdev_tx_t vlan_netpoll_send_skb(struct vlan_dev_priv *vlan, struct sk_buff *skb) |
| { |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| return netpoll_send_skb(vlan->netpoll, skb); |
| #else |
| BUG(); |
| return NETDEV_TX_OK; |
| #endif |
| } |
| |
| static netdev_tx_t vlan_dev_hard_start_xmit(struct sk_buff *skb, |
| struct net_device *dev) |
| { |
| struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
| struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); |
| unsigned int len; |
| int ret; |
| |
| /* Handle non-VLAN frames if they are sent to us, for example by DHCP. |
| * |
| * NOTE: THIS ASSUMES DIX ETHERNET, SPECIFICALLY NOT SUPPORTING |
| * OTHER THINGS LIKE FDDI/TokenRing/802.3 SNAPs... |
| */ |
| if (veth->h_vlan_proto != vlan->vlan_proto || |
| vlan->flags & VLAN_FLAG_REORDER_HDR) { |
| u16 vlan_tci; |
| vlan_tci = vlan->vlan_id; |
| vlan_tci |= vlan_dev_get_egress_qos_mask(dev, skb->priority); |
| __vlan_hwaccel_put_tag(skb, vlan->vlan_proto, vlan_tci); |
| } |
| |
| skb->dev = vlan->real_dev; |
| len = skb->len; |
| if (unlikely(netpoll_tx_running(dev))) |
| return vlan_netpoll_send_skb(vlan, skb); |
| |
| ret = dev_queue_xmit(skb); |
| |
| if (likely(ret == NET_XMIT_SUCCESS || ret == NET_XMIT_CN)) { |
| struct vlan_pcpu_stats *stats; |
| |
| stats = this_cpu_ptr(vlan->vlan_pcpu_stats); |
| u64_stats_update_begin(&stats->syncp); |
| stats->tx_packets++; |
| stats->tx_bytes += len; |
| u64_stats_update_end(&stats->syncp); |
| } else { |
| this_cpu_inc(vlan->vlan_pcpu_stats->tx_dropped); |
| } |
| |
| return ret; |
| } |
| |
| static int vlan_dev_change_mtu(struct net_device *dev, int new_mtu) |
| { |
| struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
| unsigned int max_mtu = real_dev->mtu; |
| |
| if (netif_reduces_vlan_mtu(real_dev)) |
| max_mtu -= VLAN_HLEN; |
| if (max_mtu < new_mtu) |
| return -ERANGE; |
| |
| dev->mtu = new_mtu; |
| |
| return 0; |
| } |
| |
| void vlan_dev_set_ingress_priority(const struct net_device *dev, |
| u32 skb_prio, u16 vlan_prio) |
| { |
| struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
| |
| if (vlan->ingress_priority_map[vlan_prio & 0x7] && !skb_prio) |
| vlan->nr_ingress_mappings--; |
| else if (!vlan->ingress_priority_map[vlan_prio & 0x7] && skb_prio) |
| vlan->nr_ingress_mappings++; |
| |
| vlan->ingress_priority_map[vlan_prio & 0x7] = skb_prio; |
| } |
| |
| int vlan_dev_set_egress_priority(const struct net_device *dev, |
| u32 skb_prio, u16 vlan_prio) |
| { |
| struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
| struct vlan_priority_tci_mapping *mp = NULL; |
| struct vlan_priority_tci_mapping *np; |
| u32 vlan_qos = (vlan_prio << VLAN_PRIO_SHIFT) & VLAN_PRIO_MASK; |
| |
| /* See if a priority mapping exists.. */ |
| mp = vlan->egress_priority_map[skb_prio & 0xF]; |
| while (mp) { |
| if (mp->priority == skb_prio) { |
| if (mp->vlan_qos && !vlan_qos) |
| vlan->nr_egress_mappings--; |
| else if (!mp->vlan_qos && vlan_qos) |
| vlan->nr_egress_mappings++; |
| mp->vlan_qos = vlan_qos; |
| return 0; |
| } |
| mp = mp->next; |
| } |
| |
| /* Create a new mapping then. */ |
| mp = vlan->egress_priority_map[skb_prio & 0xF]; |
| np = kmalloc(sizeof(struct vlan_priority_tci_mapping), GFP_KERNEL); |
| if (!np) |
| return -ENOBUFS; |
| |
| np->next = mp; |
| np->priority = skb_prio; |
| np->vlan_qos = vlan_qos; |
| /* Before inserting this element in hash table, make sure all its fields |
| * are committed to memory. |
| * coupled with smp_rmb() in vlan_dev_get_egress_qos_mask() |
| */ |
| smp_wmb(); |
| vlan->egress_priority_map[skb_prio & 0xF] = np; |
| if (vlan_qos) |
| vlan->nr_egress_mappings++; |
| return 0; |
| } |
| |
| /* Flags are defined in the vlan_flags enum in |
| * include/uapi/linux/if_vlan.h file. |
| */ |
| int vlan_dev_change_flags(const struct net_device *dev, u32 flags, u32 mask) |
| { |
| struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
| u32 old_flags = vlan->flags; |
| |
| if (mask & ~(VLAN_FLAG_REORDER_HDR | VLAN_FLAG_GVRP | |
| VLAN_FLAG_LOOSE_BINDING | VLAN_FLAG_MVRP | |
| VLAN_FLAG_BRIDGE_BINDING)) |
| return -EINVAL; |
| |
| vlan->flags = (old_flags & ~mask) | (flags & mask); |
| |
| if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_GVRP) { |
| if (vlan->flags & VLAN_FLAG_GVRP) |
| vlan_gvrp_request_join(dev); |
| else |
| vlan_gvrp_request_leave(dev); |
| } |
| |
| if (netif_running(dev) && (vlan->flags ^ old_flags) & VLAN_FLAG_MVRP) { |
| if (vlan->flags & VLAN_FLAG_MVRP) |
| vlan_mvrp_request_join(dev); |
| else |
| vlan_mvrp_request_leave(dev); |
| } |
| return 0; |
| } |
| |
| void vlan_dev_get_realdev_name(const struct net_device *dev, char *result, size_t size) |
| { |
| strscpy_pad(result, vlan_dev_priv(dev)->real_dev->name, size); |
| } |
| |
| bool vlan_dev_inherit_address(struct net_device *dev, |
| struct net_device *real_dev) |
| { |
| if (dev->addr_assign_type != NET_ADDR_STOLEN) |
| return false; |
| |
| eth_hw_addr_set(dev, real_dev->dev_addr); |
| call_netdevice_notifiers(NETDEV_CHANGEADDR, dev); |
| return true; |
| } |
| |
| static int vlan_dev_open(struct net_device *dev) |
| { |
| struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
| struct net_device *real_dev = vlan->real_dev; |
| int err; |
| |
| if (!(real_dev->flags & IFF_UP) && |
| !(vlan->flags & VLAN_FLAG_LOOSE_BINDING)) |
| return -ENETDOWN; |
| |
| if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr) && |
| !vlan_dev_inherit_address(dev, real_dev)) { |
| err = dev_uc_add(real_dev, dev->dev_addr); |
| if (err < 0) |
| goto out; |
| } |
| |
| if (dev->flags & IFF_ALLMULTI) { |
| err = dev_set_allmulti(real_dev, 1); |
| if (err < 0) |
| goto del_unicast; |
| } |
| if (dev->flags & IFF_PROMISC) { |
| err = dev_set_promiscuity(real_dev, 1); |
| if (err < 0) |
| goto clear_allmulti; |
| } |
| |
| ether_addr_copy(vlan->real_dev_addr, real_dev->dev_addr); |
| |
| if (vlan->flags & VLAN_FLAG_GVRP) |
| vlan_gvrp_request_join(dev); |
| |
| if (vlan->flags & VLAN_FLAG_MVRP) |
| vlan_mvrp_request_join(dev); |
| |
| if (netif_carrier_ok(real_dev) && |
| !(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) |
| netif_carrier_on(dev); |
| return 0; |
| |
| clear_allmulti: |
| if (dev->flags & IFF_ALLMULTI) |
| dev_set_allmulti(real_dev, -1); |
| del_unicast: |
| if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
| dev_uc_del(real_dev, dev->dev_addr); |
| out: |
| netif_carrier_off(dev); |
| return err; |
| } |
| |
| static int vlan_dev_stop(struct net_device *dev) |
| { |
| struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
| struct net_device *real_dev = vlan->real_dev; |
| |
| dev_mc_unsync(real_dev, dev); |
| dev_uc_unsync(real_dev, dev); |
| if (dev->flags & IFF_ALLMULTI) |
| dev_set_allmulti(real_dev, -1); |
| if (dev->flags & IFF_PROMISC) |
| dev_set_promiscuity(real_dev, -1); |
| |
| if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
| dev_uc_del(real_dev, dev->dev_addr); |
| |
| if (!(vlan->flags & VLAN_FLAG_BRIDGE_BINDING)) |
| netif_carrier_off(dev); |
| return 0; |
| } |
| |
| static int vlan_dev_set_mac_address(struct net_device *dev, void *p) |
| { |
| struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
| struct sockaddr *addr = p; |
| 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, real_dev->dev_addr)) { |
| err = dev_uc_add(real_dev, addr->sa_data); |
| if (err < 0) |
| return err; |
| } |
| |
| if (!ether_addr_equal(dev->dev_addr, real_dev->dev_addr)) |
| dev_uc_del(real_dev, dev->dev_addr); |
| |
| out: |
| eth_hw_addr_set(dev, addr->sa_data); |
| return 0; |
| } |
| |
| static int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) |
| { |
| struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
| const struct net_device_ops *ops = real_dev->netdev_ops; |
| struct ifreq ifrr; |
| int err = -EOPNOTSUPP; |
| |
| strscpy_pad(ifrr.ifr_name, real_dev->name, IFNAMSIZ); |
| ifrr.ifr_ifru = ifr->ifr_ifru; |
| |
| switch (cmd) { |
| case SIOCSHWTSTAMP: |
| if (!net_eq(dev_net(dev), &init_net)) |
| break; |
| fallthrough; |
| case SIOCGMIIPHY: |
| case SIOCGMIIREG: |
| case SIOCSMIIREG: |
| case SIOCGHWTSTAMP: |
| if (netif_device_present(real_dev) && ops->ndo_eth_ioctl) |
| err = ops->ndo_eth_ioctl(real_dev, &ifrr, cmd); |
| break; |
| } |
| |
| if (!err) |
| ifr->ifr_ifru = ifrr.ifr_ifru; |
| |
| return err; |
| } |
| |
| static int vlan_dev_neigh_setup(struct net_device *dev, struct neigh_parms *pa) |
| { |
| struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
| const struct net_device_ops *ops = real_dev->netdev_ops; |
| int err = 0; |
| |
| if (netif_device_present(real_dev) && ops->ndo_neigh_setup) |
| err = ops->ndo_neigh_setup(real_dev, pa); |
| |
| return err; |
| } |
| |
| #if IS_ENABLED(CONFIG_FCOE) |
| static int vlan_dev_fcoe_ddp_setup(struct net_device *dev, u16 xid, |
| struct scatterlist *sgl, unsigned int sgc) |
| { |
| struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
| const struct net_device_ops *ops = real_dev->netdev_ops; |
| int rc = 0; |
| |
| if (ops->ndo_fcoe_ddp_setup) |
| rc = ops->ndo_fcoe_ddp_setup(real_dev, xid, sgl, sgc); |
| |
| return rc; |
| } |
| |
| static int vlan_dev_fcoe_ddp_done(struct net_device *dev, u16 xid) |
| { |
| struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
| const struct net_device_ops *ops = real_dev->netdev_ops; |
| int len = 0; |
| |
| if (ops->ndo_fcoe_ddp_done) |
| len = ops->ndo_fcoe_ddp_done(real_dev, xid); |
| |
| return len; |
| } |
| |
| static int vlan_dev_fcoe_enable(struct net_device *dev) |
| { |
| struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
| const struct net_device_ops *ops = real_dev->netdev_ops; |
| int rc = -EINVAL; |
| |
| if (ops->ndo_fcoe_enable) |
| rc = ops->ndo_fcoe_enable(real_dev); |
| return rc; |
| } |
| |
| static int vlan_dev_fcoe_disable(struct net_device *dev) |
| { |
| struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
| const struct net_device_ops *ops = real_dev->netdev_ops; |
| int rc = -EINVAL; |
| |
| if (ops->ndo_fcoe_disable) |
| rc = ops->ndo_fcoe_disable(real_dev); |
| return rc; |
| } |
| |
| static int vlan_dev_fcoe_ddp_target(struct net_device *dev, u16 xid, |
| struct scatterlist *sgl, unsigned int sgc) |
| { |
| struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
| const struct net_device_ops *ops = real_dev->netdev_ops; |
| int rc = 0; |
| |
| if (ops->ndo_fcoe_ddp_target) |
| rc = ops->ndo_fcoe_ddp_target(real_dev, xid, sgl, sgc); |
| |
| return rc; |
| } |
| #endif |
| |
| #ifdef NETDEV_FCOE_WWNN |
| static int vlan_dev_fcoe_get_wwn(struct net_device *dev, u64 *wwn, int type) |
| { |
| struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
| const struct net_device_ops *ops = real_dev->netdev_ops; |
| int rc = -EINVAL; |
| |
| if (ops->ndo_fcoe_get_wwn) |
| rc = ops->ndo_fcoe_get_wwn(real_dev, wwn, type); |
| return rc; |
| } |
| #endif |
| |
| static void vlan_dev_change_rx_flags(struct net_device *dev, int change) |
| { |
| struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
| |
| if (dev->flags & IFF_UP) { |
| if (change & IFF_ALLMULTI) |
| dev_set_allmulti(real_dev, dev->flags & IFF_ALLMULTI ? 1 : -1); |
| if (change & IFF_PROMISC) |
| dev_set_promiscuity(real_dev, dev->flags & IFF_PROMISC ? 1 : -1); |
| } |
| } |
| |
| static void vlan_dev_set_rx_mode(struct net_device *vlan_dev) |
| { |
| dev_mc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); |
| dev_uc_sync(vlan_dev_priv(vlan_dev)->real_dev, vlan_dev); |
| } |
| |
| /* |
| * vlan network devices have devices nesting below it, and are a special |
| * "super class" of normal network devices; split their locks off into a |
| * separate class since they always nest. |
| */ |
| static struct lock_class_key vlan_netdev_xmit_lock_key; |
| static struct lock_class_key vlan_netdev_addr_lock_key; |
| |
| static void vlan_dev_set_lockdep_one(struct net_device *dev, |
| struct netdev_queue *txq, |
| void *unused) |
| { |
| lockdep_set_class(&txq->_xmit_lock, &vlan_netdev_xmit_lock_key); |
| } |
| |
| static void vlan_dev_set_lockdep_class(struct net_device *dev) |
| { |
| lockdep_set_class(&dev->addr_list_lock, |
| &vlan_netdev_addr_lock_key); |
| netdev_for_each_tx_queue(dev, vlan_dev_set_lockdep_one, NULL); |
| } |
| |
| static __be16 vlan_parse_protocol(const struct sk_buff *skb) |
| { |
| struct vlan_ethhdr *veth = (struct vlan_ethhdr *)(skb->data); |
| |
| return __vlan_get_protocol(skb, veth->h_vlan_proto, NULL); |
| } |
| |
| static const struct header_ops vlan_header_ops = { |
| .create = vlan_dev_hard_header, |
| .parse = eth_header_parse, |
| .parse_protocol = vlan_parse_protocol, |
| }; |
| |
| static int vlan_passthru_hard_header(struct sk_buff *skb, struct net_device *dev, |
| unsigned short type, |
| const void *daddr, const void *saddr, |
| unsigned int len) |
| { |
| struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
| struct net_device *real_dev = vlan->real_dev; |
| |
| if (saddr == NULL) |
| saddr = dev->dev_addr; |
| |
| return dev_hard_header(skb, real_dev, type, daddr, saddr, len); |
| } |
| |
| static const struct header_ops vlan_passthru_header_ops = { |
| .create = vlan_passthru_hard_header, |
| .parse = eth_header_parse, |
| .parse_protocol = vlan_parse_protocol, |
| }; |
| |
| static struct device_type vlan_type = { |
| .name = "vlan", |
| }; |
| |
| static const struct net_device_ops vlan_netdev_ops; |
| |
| static int vlan_dev_init(struct net_device *dev) |
| { |
| struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
| struct net_device *real_dev = vlan->real_dev; |
| |
| netif_carrier_off(dev); |
| |
| /* IFF_BROADCAST|IFF_MULTICAST; ??? */ |
| dev->flags = real_dev->flags & ~(IFF_UP | IFF_PROMISC | IFF_ALLMULTI | |
| IFF_MASTER | IFF_SLAVE); |
| dev->state = (real_dev->state & ((1<<__LINK_STATE_NOCARRIER) | |
| (1<<__LINK_STATE_DORMANT))) | |
| (1<<__LINK_STATE_PRESENT); |
| |
| if (vlan->flags & VLAN_FLAG_BRIDGE_BINDING) |
| dev->state |= (1 << __LINK_STATE_NOCARRIER); |
| |
| dev->hw_features = NETIF_F_HW_CSUM | NETIF_F_SG | |
| NETIF_F_FRAGLIST | NETIF_F_GSO_SOFTWARE | |
| NETIF_F_GSO_ENCAP_ALL | |
| NETIF_F_HIGHDMA | NETIF_F_SCTP_CRC | |
| NETIF_F_ALL_FCOE; |
| |
| dev->features |= dev->hw_features | NETIF_F_LLTX; |
| netif_inherit_tso_max(dev, real_dev); |
| if (dev->features & NETIF_F_VLAN_FEATURES) |
| netdev_warn(real_dev, "VLAN features are set incorrectly. Q-in-Q configurations may not work correctly.\n"); |
| |
| dev->vlan_features = real_dev->vlan_features & ~NETIF_F_ALL_FCOE; |
| dev->hw_enc_features = vlan_tnl_features(real_dev); |
| dev->mpls_features = real_dev->mpls_features; |
| |
| /* ipv6 shared card related stuff */ |
| dev->dev_id = real_dev->dev_id; |
| |
| if (is_zero_ether_addr(dev->dev_addr)) { |
| eth_hw_addr_set(dev, real_dev->dev_addr); |
| dev->addr_assign_type = NET_ADDR_STOLEN; |
| } |
| if (is_zero_ether_addr(dev->broadcast)) |
| memcpy(dev->broadcast, real_dev->broadcast, dev->addr_len); |
| |
| #if IS_ENABLED(CONFIG_FCOE) |
| dev->fcoe_ddp_xid = real_dev->fcoe_ddp_xid; |
| #endif |
| |
| dev->needed_headroom = real_dev->needed_headroom; |
| if (vlan_hw_offload_capable(real_dev->features, vlan->vlan_proto)) { |
| dev->header_ops = &vlan_passthru_header_ops; |
| dev->hard_header_len = real_dev->hard_header_len; |
| } else { |
| dev->header_ops = &vlan_header_ops; |
| dev->hard_header_len = real_dev->hard_header_len + VLAN_HLEN; |
| } |
| |
| dev->netdev_ops = &vlan_netdev_ops; |
| |
| SET_NETDEV_DEVTYPE(dev, &vlan_type); |
| |
| vlan_dev_set_lockdep_class(dev); |
| |
| vlan->vlan_pcpu_stats = netdev_alloc_pcpu_stats(struct vlan_pcpu_stats); |
| if (!vlan->vlan_pcpu_stats) |
| return -ENOMEM; |
| |
| /* Get vlan's reference to real_dev */ |
| dev_hold_track(real_dev, &vlan->dev_tracker, GFP_KERNEL); |
| |
| return 0; |
| } |
| |
| /* Note: this function might be called multiple times for the same device. */ |
| void vlan_dev_free_egress_priority(const struct net_device *dev) |
| { |
| struct vlan_priority_tci_mapping *pm; |
| struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(vlan->egress_priority_map); i++) { |
| while ((pm = vlan->egress_priority_map[i]) != NULL) { |
| vlan->egress_priority_map[i] = pm->next; |
| kfree(pm); |
| } |
| } |
| } |
| |
| static void vlan_dev_uninit(struct net_device *dev) |
| { |
| vlan_dev_free_egress_priority(dev); |
| } |
| |
| static netdev_features_t vlan_dev_fix_features(struct net_device *dev, |
| netdev_features_t features) |
| { |
| struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
| netdev_features_t old_features = features; |
| netdev_features_t lower_features; |
| |
| lower_features = netdev_intersect_features((real_dev->vlan_features | |
| NETIF_F_RXCSUM), |
| real_dev->features); |
| |
| /* Add HW_CSUM setting to preserve user ability to control |
| * checksum offload on the vlan device. |
| */ |
| if (lower_features & (NETIF_F_IP_CSUM|NETIF_F_IPV6_CSUM)) |
| lower_features |= NETIF_F_HW_CSUM; |
| features = netdev_intersect_features(features, lower_features); |
| features |= old_features & (NETIF_F_SOFT_FEATURES | NETIF_F_GSO_SOFTWARE); |
| features |= NETIF_F_LLTX; |
| |
| return features; |
| } |
| |
| static int vlan_ethtool_get_link_ksettings(struct net_device *dev, |
| struct ethtool_link_ksettings *cmd) |
| { |
| const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
| |
| return __ethtool_get_link_ksettings(vlan->real_dev, cmd); |
| } |
| |
| static void vlan_ethtool_get_drvinfo(struct net_device *dev, |
| struct ethtool_drvinfo *info) |
| { |
| strlcpy(info->driver, vlan_fullname, sizeof(info->driver)); |
| strlcpy(info->version, vlan_version, sizeof(info->version)); |
| strlcpy(info->fw_version, "N/A", sizeof(info->fw_version)); |
| } |
| |
| static int vlan_ethtool_get_ts_info(struct net_device *dev, |
| struct ethtool_ts_info *info) |
| { |
| const struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
| const struct ethtool_ops *ops = vlan->real_dev->ethtool_ops; |
| struct phy_device *phydev = vlan->real_dev->phydev; |
| |
| if (phy_has_tsinfo(phydev)) { |
| return phy_ts_info(phydev, info); |
| } else if (ops->get_ts_info) { |
| return ops->get_ts_info(vlan->real_dev, info); |
| } else { |
| info->so_timestamping = SOF_TIMESTAMPING_RX_SOFTWARE | |
| SOF_TIMESTAMPING_SOFTWARE; |
| info->phc_index = -1; |
| } |
| |
| return 0; |
| } |
| |
| static void vlan_dev_get_stats64(struct net_device *dev, |
| struct rtnl_link_stats64 *stats) |
| { |
| struct vlan_pcpu_stats *p; |
| u32 rx_errors = 0, tx_dropped = 0; |
| int i; |
| |
| for_each_possible_cpu(i) { |
| u64 rxpackets, rxbytes, rxmulticast, txpackets, txbytes; |
| unsigned int start; |
| |
| p = per_cpu_ptr(vlan_dev_priv(dev)->vlan_pcpu_stats, i); |
| do { |
| start = u64_stats_fetch_begin_irq(&p->syncp); |
| rxpackets = p->rx_packets; |
| rxbytes = p->rx_bytes; |
| rxmulticast = p->rx_multicast; |
| txpackets = p->tx_packets; |
| txbytes = p->tx_bytes; |
| } while (u64_stats_fetch_retry_irq(&p->syncp, start)); |
| |
| stats->rx_packets += rxpackets; |
| stats->rx_bytes += rxbytes; |
| stats->multicast += rxmulticast; |
| stats->tx_packets += txpackets; |
| stats->tx_bytes += txbytes; |
| /* rx_errors & tx_dropped are u32 */ |
| rx_errors += p->rx_errors; |
| tx_dropped += p->tx_dropped; |
| } |
| stats->rx_errors = rx_errors; |
| stats->tx_dropped = tx_dropped; |
| } |
| |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| static void vlan_dev_poll_controller(struct net_device *dev) |
| { |
| return; |
| } |
| |
| static int vlan_dev_netpoll_setup(struct net_device *dev, struct netpoll_info *npinfo) |
| { |
| struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
| struct net_device *real_dev = vlan->real_dev; |
| struct netpoll *netpoll; |
| int err = 0; |
| |
| netpoll = kzalloc(sizeof(*netpoll), GFP_KERNEL); |
| err = -ENOMEM; |
| if (!netpoll) |
| goto out; |
| |
| err = __netpoll_setup(netpoll, real_dev); |
| if (err) { |
| kfree(netpoll); |
| goto out; |
| } |
| |
| vlan->netpoll = netpoll; |
| |
| out: |
| return err; |
| } |
| |
| static void vlan_dev_netpoll_cleanup(struct net_device *dev) |
| { |
| struct vlan_dev_priv *vlan= vlan_dev_priv(dev); |
| struct netpoll *netpoll = vlan->netpoll; |
| |
| if (!netpoll) |
| return; |
| |
| vlan->netpoll = NULL; |
| __netpoll_free(netpoll); |
| } |
| #endif /* CONFIG_NET_POLL_CONTROLLER */ |
| |
| static int vlan_dev_get_iflink(const struct net_device *dev) |
| { |
| struct net_device *real_dev = vlan_dev_priv(dev)->real_dev; |
| |
| return real_dev->ifindex; |
| } |
| |
| static int vlan_dev_fill_forward_path(struct net_device_path_ctx *ctx, |
| struct net_device_path *path) |
| { |
| struct vlan_dev_priv *vlan = vlan_dev_priv(ctx->dev); |
| |
| path->type = DEV_PATH_VLAN; |
| path->encap.id = vlan->vlan_id; |
| path->encap.proto = vlan->vlan_proto; |
| path->dev = ctx->dev; |
| ctx->dev = vlan->real_dev; |
| if (ctx->num_vlans >= ARRAY_SIZE(ctx->vlan)) |
| return -ENOSPC; |
| |
| ctx->vlan[ctx->num_vlans].id = vlan->vlan_id; |
| ctx->vlan[ctx->num_vlans].proto = vlan->vlan_proto; |
| ctx->num_vlans++; |
| |
| return 0; |
| } |
| |
| static const struct ethtool_ops vlan_ethtool_ops = { |
| .get_link_ksettings = vlan_ethtool_get_link_ksettings, |
| .get_drvinfo = vlan_ethtool_get_drvinfo, |
| .get_link = ethtool_op_get_link, |
| .get_ts_info = vlan_ethtool_get_ts_info, |
| }; |
| |
| static const struct net_device_ops vlan_netdev_ops = { |
| .ndo_change_mtu = vlan_dev_change_mtu, |
| .ndo_init = vlan_dev_init, |
| .ndo_uninit = vlan_dev_uninit, |
| .ndo_open = vlan_dev_open, |
| .ndo_stop = vlan_dev_stop, |
| .ndo_start_xmit = vlan_dev_hard_start_xmit, |
| .ndo_validate_addr = eth_validate_addr, |
| .ndo_set_mac_address = vlan_dev_set_mac_address, |
| .ndo_set_rx_mode = vlan_dev_set_rx_mode, |
| .ndo_change_rx_flags = vlan_dev_change_rx_flags, |
| .ndo_eth_ioctl = vlan_dev_ioctl, |
| .ndo_neigh_setup = vlan_dev_neigh_setup, |
| .ndo_get_stats64 = vlan_dev_get_stats64, |
| #if IS_ENABLED(CONFIG_FCOE) |
| .ndo_fcoe_ddp_setup = vlan_dev_fcoe_ddp_setup, |
| .ndo_fcoe_ddp_done = vlan_dev_fcoe_ddp_done, |
| .ndo_fcoe_enable = vlan_dev_fcoe_enable, |
| .ndo_fcoe_disable = vlan_dev_fcoe_disable, |
| .ndo_fcoe_ddp_target = vlan_dev_fcoe_ddp_target, |
| #endif |
| #ifdef NETDEV_FCOE_WWNN |
| .ndo_fcoe_get_wwn = vlan_dev_fcoe_get_wwn, |
| #endif |
| #ifdef CONFIG_NET_POLL_CONTROLLER |
| .ndo_poll_controller = vlan_dev_poll_controller, |
| .ndo_netpoll_setup = vlan_dev_netpoll_setup, |
| .ndo_netpoll_cleanup = vlan_dev_netpoll_cleanup, |
| #endif |
| .ndo_fix_features = vlan_dev_fix_features, |
| .ndo_get_iflink = vlan_dev_get_iflink, |
| .ndo_fill_forward_path = vlan_dev_fill_forward_path, |
| }; |
| |
| static void vlan_dev_free(struct net_device *dev) |
| { |
| struct vlan_dev_priv *vlan = vlan_dev_priv(dev); |
| |
| free_percpu(vlan->vlan_pcpu_stats); |
| vlan->vlan_pcpu_stats = NULL; |
| |
| /* Get rid of the vlan's reference to real_dev */ |
| dev_put_track(vlan->real_dev, &vlan->dev_tracker); |
| } |
| |
| void vlan_setup(struct net_device *dev) |
| { |
| ether_setup(dev); |
| |
| dev->priv_flags |= IFF_802_1Q_VLAN | IFF_NO_QUEUE; |
| dev->priv_flags |= IFF_UNICAST_FLT; |
| dev->priv_flags &= ~IFF_TX_SKB_SHARING; |
| netif_keep_dst(dev); |
| |
| dev->netdev_ops = &vlan_netdev_ops; |
| dev->needs_free_netdev = true; |
| dev->priv_destructor = vlan_dev_free; |
| dev->ethtool_ops = &vlan_ethtool_ops; |
| |
| dev->min_mtu = 0; |
| dev->max_mtu = ETH_MAX_MTU; |
| |
| eth_zero_addr(dev->broadcast); |
| } |