| // SPDX-License-Identifier: GPL-2.0-only |
| #include <linux/kernel.h> |
| #include <linux/netdevice.h> |
| #include <linux/rtnetlink.h> |
| #include <linux/slab.h> |
| #include <net/switchdev.h> |
| |
| #include "br_private.h" |
| #include "br_private_tunnel.h" |
| |
| static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid); |
| |
| static inline int br_vlan_cmp(struct rhashtable_compare_arg *arg, |
| const void *ptr) |
| { |
| const struct net_bridge_vlan *vle = ptr; |
| u16 vid = *(u16 *)arg->key; |
| |
| return vle->vid != vid; |
| } |
| |
| static const struct rhashtable_params br_vlan_rht_params = { |
| .head_offset = offsetof(struct net_bridge_vlan, vnode), |
| .key_offset = offsetof(struct net_bridge_vlan, vid), |
| .key_len = sizeof(u16), |
| .nelem_hint = 3, |
| .max_size = VLAN_N_VID, |
| .obj_cmpfn = br_vlan_cmp, |
| .automatic_shrinking = true, |
| }; |
| |
| static struct net_bridge_vlan *br_vlan_lookup(struct rhashtable *tbl, u16 vid) |
| { |
| return rhashtable_lookup_fast(tbl, &vid, br_vlan_rht_params); |
| } |
| |
| static bool __vlan_add_pvid(struct net_bridge_vlan_group *vg, |
| const struct net_bridge_vlan *v) |
| { |
| if (vg->pvid == v->vid) |
| return false; |
| |
| smp_wmb(); |
| br_vlan_set_pvid_state(vg, v->state); |
| vg->pvid = v->vid; |
| |
| return true; |
| } |
| |
| static bool __vlan_delete_pvid(struct net_bridge_vlan_group *vg, u16 vid) |
| { |
| if (vg->pvid != vid) |
| return false; |
| |
| smp_wmb(); |
| vg->pvid = 0; |
| |
| return true; |
| } |
| |
| /* return true if anything changed, false otherwise */ |
| static bool __vlan_add_flags(struct net_bridge_vlan *v, u16 flags) |
| { |
| struct net_bridge_vlan_group *vg; |
| u16 old_flags = v->flags; |
| bool ret; |
| |
| if (br_vlan_is_master(v)) |
| vg = br_vlan_group(v->br); |
| else |
| vg = nbp_vlan_group(v->port); |
| |
| if (flags & BRIDGE_VLAN_INFO_PVID) |
| ret = __vlan_add_pvid(vg, v); |
| else |
| ret = __vlan_delete_pvid(vg, v->vid); |
| |
| if (flags & BRIDGE_VLAN_INFO_UNTAGGED) |
| v->flags |= BRIDGE_VLAN_INFO_UNTAGGED; |
| else |
| v->flags &= ~BRIDGE_VLAN_INFO_UNTAGGED; |
| |
| return ret || !!(old_flags ^ v->flags); |
| } |
| |
| static int __vlan_vid_add(struct net_device *dev, struct net_bridge *br, |
| struct net_bridge_vlan *v, u16 flags, |
| struct netlink_ext_ack *extack) |
| { |
| int err; |
| |
| /* Try switchdev op first. In case it is not supported, fallback to |
| * 8021q add. |
| */ |
| err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack); |
| if (err == -EOPNOTSUPP) |
| return vlan_vid_add(dev, br->vlan_proto, v->vid); |
| v->priv_flags |= BR_VLFLAG_ADDED_BY_SWITCHDEV; |
| return err; |
| } |
| |
| static void __vlan_add_list(struct net_bridge_vlan *v) |
| { |
| struct net_bridge_vlan_group *vg; |
| struct list_head *headp, *hpos; |
| struct net_bridge_vlan *vent; |
| |
| if (br_vlan_is_master(v)) |
| vg = br_vlan_group(v->br); |
| else |
| vg = nbp_vlan_group(v->port); |
| |
| headp = &vg->vlan_list; |
| list_for_each_prev(hpos, headp) { |
| vent = list_entry(hpos, struct net_bridge_vlan, vlist); |
| if (v->vid < vent->vid) |
| continue; |
| else |
| break; |
| } |
| list_add_rcu(&v->vlist, hpos); |
| } |
| |
| static void __vlan_del_list(struct net_bridge_vlan *v) |
| { |
| list_del_rcu(&v->vlist); |
| } |
| |
| static int __vlan_vid_del(struct net_device *dev, struct net_bridge *br, |
| const struct net_bridge_vlan *v) |
| { |
| int err; |
| |
| /* Try switchdev op first. In case it is not supported, fallback to |
| * 8021q del. |
| */ |
| err = br_switchdev_port_vlan_del(dev, v->vid); |
| if (!(v->priv_flags & BR_VLFLAG_ADDED_BY_SWITCHDEV)) |
| vlan_vid_del(dev, br->vlan_proto, v->vid); |
| return err == -EOPNOTSUPP ? 0 : err; |
| } |
| |
| /* Returns a master vlan, if it didn't exist it gets created. In all cases a |
| * a reference is taken to the master vlan before returning. |
| */ |
| static struct net_bridge_vlan * |
| br_vlan_get_master(struct net_bridge *br, u16 vid, |
| struct netlink_ext_ack *extack) |
| { |
| struct net_bridge_vlan_group *vg; |
| struct net_bridge_vlan *masterv; |
| |
| vg = br_vlan_group(br); |
| masterv = br_vlan_find(vg, vid); |
| if (!masterv) { |
| bool changed; |
| |
| /* missing global ctx, create it now */ |
| if (br_vlan_add(br, vid, 0, &changed, extack)) |
| return NULL; |
| masterv = br_vlan_find(vg, vid); |
| if (WARN_ON(!masterv)) |
| return NULL; |
| refcount_set(&masterv->refcnt, 1); |
| return masterv; |
| } |
| refcount_inc(&masterv->refcnt); |
| |
| return masterv; |
| } |
| |
| static void br_master_vlan_rcu_free(struct rcu_head *rcu) |
| { |
| struct net_bridge_vlan *v; |
| |
| v = container_of(rcu, struct net_bridge_vlan, rcu); |
| WARN_ON(!br_vlan_is_master(v)); |
| free_percpu(v->stats); |
| v->stats = NULL; |
| kfree(v); |
| } |
| |
| static void br_vlan_put_master(struct net_bridge_vlan *masterv) |
| { |
| struct net_bridge_vlan_group *vg; |
| |
| if (!br_vlan_is_master(masterv)) |
| return; |
| |
| vg = br_vlan_group(masterv->br); |
| if (refcount_dec_and_test(&masterv->refcnt)) { |
| rhashtable_remove_fast(&vg->vlan_hash, |
| &masterv->vnode, br_vlan_rht_params); |
| __vlan_del_list(masterv); |
| call_rcu(&masterv->rcu, br_master_vlan_rcu_free); |
| } |
| } |
| |
| static void nbp_vlan_rcu_free(struct rcu_head *rcu) |
| { |
| struct net_bridge_vlan *v; |
| |
| v = container_of(rcu, struct net_bridge_vlan, rcu); |
| WARN_ON(br_vlan_is_master(v)); |
| /* if we had per-port stats configured then free them here */ |
| if (v->priv_flags & BR_VLFLAG_PER_PORT_STATS) |
| free_percpu(v->stats); |
| v->stats = NULL; |
| kfree(v); |
| } |
| |
| /* This is the shared VLAN add function which works for both ports and bridge |
| * devices. There are four possible calls to this function in terms of the |
| * vlan entry type: |
| * 1. vlan is being added on a port (no master flags, global entry exists) |
| * 2. vlan is being added on a bridge (both master and brentry flags) |
| * 3. vlan is being added on a port, but a global entry didn't exist which |
| * is being created right now (master flag set, brentry flag unset), the |
| * global entry is used for global per-vlan features, but not for filtering |
| * 4. same as 3 but with both master and brentry flags set so the entry |
| * will be used for filtering in both the port and the bridge |
| */ |
| static int __vlan_add(struct net_bridge_vlan *v, u16 flags, |
| struct netlink_ext_ack *extack) |
| { |
| struct net_bridge_vlan *masterv = NULL; |
| struct net_bridge_port *p = NULL; |
| struct net_bridge_vlan_group *vg; |
| struct net_device *dev; |
| struct net_bridge *br; |
| int err; |
| |
| if (br_vlan_is_master(v)) { |
| br = v->br; |
| dev = br->dev; |
| vg = br_vlan_group(br); |
| } else { |
| p = v->port; |
| br = p->br; |
| dev = p->dev; |
| vg = nbp_vlan_group(p); |
| } |
| |
| if (p) { |
| /* Add VLAN to the device filter if it is supported. |
| * This ensures tagged traffic enters the bridge when |
| * promiscuous mode is disabled by br_manage_promisc(). |
| */ |
| err = __vlan_vid_add(dev, br, v, flags, extack); |
| if (err) |
| goto out; |
| |
| /* need to work on the master vlan too */ |
| if (flags & BRIDGE_VLAN_INFO_MASTER) { |
| bool changed; |
| |
| err = br_vlan_add(br, v->vid, |
| flags | BRIDGE_VLAN_INFO_BRENTRY, |
| &changed, extack); |
| if (err) |
| goto out_filt; |
| |
| if (changed) |
| br_vlan_notify(br, NULL, v->vid, 0, |
| RTM_NEWVLAN); |
| } |
| |
| masterv = br_vlan_get_master(br, v->vid, extack); |
| if (!masterv) |
| goto out_filt; |
| v->brvlan = masterv; |
| if (br_opt_get(br, BROPT_VLAN_STATS_PER_PORT)) { |
| v->stats = netdev_alloc_pcpu_stats(struct br_vlan_stats); |
| if (!v->stats) { |
| err = -ENOMEM; |
| goto out_filt; |
| } |
| v->priv_flags |= BR_VLFLAG_PER_PORT_STATS; |
| } else { |
| v->stats = masterv->stats; |
| } |
| } else { |
| err = br_switchdev_port_vlan_add(dev, v->vid, flags, extack); |
| if (err && err != -EOPNOTSUPP) |
| goto out; |
| } |
| |
| /* Add the dev mac and count the vlan only if it's usable */ |
| if (br_vlan_should_use(v)) { |
| err = br_fdb_insert(br, p, dev->dev_addr, v->vid); |
| if (err) { |
| br_err(br, "failed insert local address into bridge forwarding table\n"); |
| goto out_filt; |
| } |
| vg->num_vlans++; |
| } |
| |
| /* set the state before publishing */ |
| v->state = BR_STATE_FORWARDING; |
| |
| err = rhashtable_lookup_insert_fast(&vg->vlan_hash, &v->vnode, |
| br_vlan_rht_params); |
| if (err) |
| goto out_fdb_insert; |
| |
| __vlan_add_list(v); |
| __vlan_add_flags(v, flags); |
| |
| if (p) |
| nbp_vlan_set_vlan_dev_state(p, v->vid); |
| out: |
| return err; |
| |
| out_fdb_insert: |
| if (br_vlan_should_use(v)) { |
| br_fdb_find_delete_local(br, p, dev->dev_addr, v->vid); |
| vg->num_vlans--; |
| } |
| |
| out_filt: |
| if (p) { |
| __vlan_vid_del(dev, br, v); |
| if (masterv) { |
| if (v->stats && masterv->stats != v->stats) |
| free_percpu(v->stats); |
| v->stats = NULL; |
| |
| br_vlan_put_master(masterv); |
| v->brvlan = NULL; |
| } |
| } else { |
| br_switchdev_port_vlan_del(dev, v->vid); |
| } |
| |
| goto out; |
| } |
| |
| static int __vlan_del(struct net_bridge_vlan *v) |
| { |
| struct net_bridge_vlan *masterv = v; |
| struct net_bridge_vlan_group *vg; |
| struct net_bridge_port *p = NULL; |
| int err = 0; |
| |
| if (br_vlan_is_master(v)) { |
| vg = br_vlan_group(v->br); |
| } else { |
| p = v->port; |
| vg = nbp_vlan_group(v->port); |
| masterv = v->brvlan; |
| } |
| |
| __vlan_delete_pvid(vg, v->vid); |
| if (p) { |
| err = __vlan_vid_del(p->dev, p->br, v); |
| if (err) |
| goto out; |
| } else { |
| err = br_switchdev_port_vlan_del(v->br->dev, v->vid); |
| if (err && err != -EOPNOTSUPP) |
| goto out; |
| err = 0; |
| } |
| |
| if (br_vlan_should_use(v)) { |
| v->flags &= ~BRIDGE_VLAN_INFO_BRENTRY; |
| vg->num_vlans--; |
| } |
| |
| if (masterv != v) { |
| vlan_tunnel_info_del(vg, v); |
| rhashtable_remove_fast(&vg->vlan_hash, &v->vnode, |
| br_vlan_rht_params); |
| __vlan_del_list(v); |
| nbp_vlan_set_vlan_dev_state(p, v->vid); |
| call_rcu(&v->rcu, nbp_vlan_rcu_free); |
| } |
| |
| br_vlan_put_master(masterv); |
| out: |
| return err; |
| } |
| |
| static void __vlan_group_free(struct net_bridge_vlan_group *vg) |
| { |
| WARN_ON(!list_empty(&vg->vlan_list)); |
| rhashtable_destroy(&vg->vlan_hash); |
| vlan_tunnel_deinit(vg); |
| kfree(vg); |
| } |
| |
| static void __vlan_flush(const struct net_bridge *br, |
| const struct net_bridge_port *p, |
| struct net_bridge_vlan_group *vg) |
| { |
| struct net_bridge_vlan *vlan, *tmp; |
| u16 v_start = 0, v_end = 0; |
| |
| __vlan_delete_pvid(vg, vg->pvid); |
| list_for_each_entry_safe(vlan, tmp, &vg->vlan_list, vlist) { |
| /* take care of disjoint ranges */ |
| if (!v_start) { |
| v_start = vlan->vid; |
| } else if (vlan->vid - v_end != 1) { |
| /* found range end, notify and start next one */ |
| br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN); |
| v_start = vlan->vid; |
| } |
| v_end = vlan->vid; |
| |
| __vlan_del(vlan); |
| } |
| |
| /* notify about the last/whole vlan range */ |
| if (v_start) |
| br_vlan_notify(br, p, v_start, v_end, RTM_DELVLAN); |
| } |
| |
| struct sk_buff *br_handle_vlan(struct net_bridge *br, |
| const struct net_bridge_port *p, |
| struct net_bridge_vlan_group *vg, |
| struct sk_buff *skb) |
| { |
| struct br_vlan_stats *stats; |
| struct net_bridge_vlan *v; |
| u16 vid; |
| |
| /* If this packet was not filtered at input, let it pass */ |
| if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) |
| goto out; |
| |
| /* At this point, we know that the frame was filtered and contains |
| * a valid vlan id. If the vlan id has untagged flag set, |
| * send untagged; otherwise, send tagged. |
| */ |
| br_vlan_get_tag(skb, &vid); |
| v = br_vlan_find(vg, vid); |
| /* Vlan entry must be configured at this point. The |
| * only exception is the bridge is set in promisc mode and the |
| * packet is destined for the bridge device. In this case |
| * pass the packet as is. |
| */ |
| if (!v || !br_vlan_should_use(v)) { |
| if ((br->dev->flags & IFF_PROMISC) && skb->dev == br->dev) { |
| goto out; |
| } else { |
| kfree_skb(skb); |
| return NULL; |
| } |
| } |
| if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { |
| stats = this_cpu_ptr(v->stats); |
| u64_stats_update_begin(&stats->syncp); |
| stats->tx_bytes += skb->len; |
| stats->tx_packets++; |
| u64_stats_update_end(&stats->syncp); |
| } |
| |
| if (v->flags & BRIDGE_VLAN_INFO_UNTAGGED) |
| __vlan_hwaccel_clear_tag(skb); |
| |
| if (p && (p->flags & BR_VLAN_TUNNEL) && |
| br_handle_egress_vlan_tunnel(skb, v)) { |
| kfree_skb(skb); |
| return NULL; |
| } |
| out: |
| return skb; |
| } |
| |
| /* Called under RCU */ |
| static bool __allowed_ingress(const struct net_bridge *br, |
| struct net_bridge_vlan_group *vg, |
| struct sk_buff *skb, u16 *vid, |
| u8 *state) |
| { |
| struct br_vlan_stats *stats; |
| struct net_bridge_vlan *v; |
| bool tagged; |
| |
| BR_INPUT_SKB_CB(skb)->vlan_filtered = true; |
| /* If vlan tx offload is disabled on bridge device and frame was |
| * sent from vlan device on the bridge device, it does not have |
| * HW accelerated vlan tag. |
| */ |
| if (unlikely(!skb_vlan_tag_present(skb) && |
| skb->protocol == br->vlan_proto)) { |
| skb = skb_vlan_untag(skb); |
| if (unlikely(!skb)) |
| return false; |
| } |
| |
| if (!br_vlan_get_tag(skb, vid)) { |
| /* Tagged frame */ |
| if (skb->vlan_proto != br->vlan_proto) { |
| /* Protocol-mismatch, empty out vlan_tci for new tag */ |
| skb_push(skb, ETH_HLEN); |
| skb = vlan_insert_tag_set_proto(skb, skb->vlan_proto, |
| skb_vlan_tag_get(skb)); |
| if (unlikely(!skb)) |
| return false; |
| |
| skb_pull(skb, ETH_HLEN); |
| skb_reset_mac_len(skb); |
| *vid = 0; |
| tagged = false; |
| } else { |
| tagged = true; |
| } |
| } else { |
| /* Untagged frame */ |
| tagged = false; |
| } |
| |
| if (!*vid) { |
| u16 pvid = br_get_pvid(vg); |
| |
| /* Frame had a tag with VID 0 or did not have a tag. |
| * See if pvid is set on this port. That tells us which |
| * vlan untagged or priority-tagged traffic belongs to. |
| */ |
| if (!pvid) |
| goto drop; |
| |
| /* PVID is set on this port. Any untagged or priority-tagged |
| * ingress frame is considered to belong to this vlan. |
| */ |
| *vid = pvid; |
| if (likely(!tagged)) |
| /* Untagged Frame. */ |
| __vlan_hwaccel_put_tag(skb, br->vlan_proto, pvid); |
| else |
| /* Priority-tagged Frame. |
| * At this point, we know that skb->vlan_tci VID |
| * field was 0. |
| * We update only VID field and preserve PCP field. |
| */ |
| skb->vlan_tci |= pvid; |
| |
| /* if stats are disabled we can avoid the lookup */ |
| if (!br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { |
| if (*state == BR_STATE_FORWARDING) { |
| *state = br_vlan_get_pvid_state(vg); |
| return br_vlan_state_allowed(*state, true); |
| } else { |
| return true; |
| } |
| } |
| } |
| v = br_vlan_find(vg, *vid); |
| if (!v || !br_vlan_should_use(v)) |
| goto drop; |
| |
| if (*state == BR_STATE_FORWARDING) { |
| *state = br_vlan_get_state(v); |
| if (!br_vlan_state_allowed(*state, true)) |
| goto drop; |
| } |
| |
| if (br_opt_get(br, BROPT_VLAN_STATS_ENABLED)) { |
| stats = this_cpu_ptr(v->stats); |
| u64_stats_update_begin(&stats->syncp); |
| stats->rx_bytes += skb->len; |
| stats->rx_packets++; |
| u64_stats_update_end(&stats->syncp); |
| } |
| |
| return true; |
| |
| drop: |
| kfree_skb(skb); |
| return false; |
| } |
| |
| bool br_allowed_ingress(const struct net_bridge *br, |
| struct net_bridge_vlan_group *vg, struct sk_buff *skb, |
| u16 *vid, u8 *state) |
| { |
| /* If VLAN filtering is disabled on the bridge, all packets are |
| * permitted. |
| */ |
| if (!br_opt_get(br, BROPT_VLAN_ENABLED)) { |
| BR_INPUT_SKB_CB(skb)->vlan_filtered = false; |
| return true; |
| } |
| |
| return __allowed_ingress(br, vg, skb, vid, state); |
| } |
| |
| /* Called under RCU. */ |
| bool br_allowed_egress(struct net_bridge_vlan_group *vg, |
| const struct sk_buff *skb) |
| { |
| const struct net_bridge_vlan *v; |
| u16 vid; |
| |
| /* If this packet was not filtered at input, let it pass */ |
| if (!BR_INPUT_SKB_CB(skb)->vlan_filtered) |
| return true; |
| |
| br_vlan_get_tag(skb, &vid); |
| v = br_vlan_find(vg, vid); |
| if (v && br_vlan_should_use(v) && |
| br_vlan_state_allowed(br_vlan_get_state(v), false)) |
| return true; |
| |
| return false; |
| } |
| |
| /* Called under RCU */ |
| bool br_should_learn(struct net_bridge_port *p, struct sk_buff *skb, u16 *vid) |
| { |
| struct net_bridge_vlan_group *vg; |
| struct net_bridge *br = p->br; |
| struct net_bridge_vlan *v; |
| |
| /* If filtering was disabled at input, let it pass. */ |
| if (!br_opt_get(br, BROPT_VLAN_ENABLED)) |
| return true; |
| |
| vg = nbp_vlan_group_rcu(p); |
| if (!vg || !vg->num_vlans) |
| return false; |
| |
| if (!br_vlan_get_tag(skb, vid) && skb->vlan_proto != br->vlan_proto) |
| *vid = 0; |
| |
| if (!*vid) { |
| *vid = br_get_pvid(vg); |
| if (!*vid || |
| !br_vlan_state_allowed(br_vlan_get_pvid_state(vg), true)) |
| return false; |
| |
| return true; |
| } |
| |
| v = br_vlan_find(vg, *vid); |
| if (v && br_vlan_state_allowed(br_vlan_get_state(v), true)) |
| return true; |
| |
| return false; |
| } |
| |
| static int br_vlan_add_existing(struct net_bridge *br, |
| struct net_bridge_vlan_group *vg, |
| struct net_bridge_vlan *vlan, |
| u16 flags, bool *changed, |
| struct netlink_ext_ack *extack) |
| { |
| int err; |
| |
| err = br_switchdev_port_vlan_add(br->dev, vlan->vid, flags, extack); |
| if (err && err != -EOPNOTSUPP) |
| return err; |
| |
| if (!br_vlan_is_brentry(vlan)) { |
| /* Trying to change flags of non-existent bridge vlan */ |
| if (!(flags & BRIDGE_VLAN_INFO_BRENTRY)) { |
| err = -EINVAL; |
| goto err_flags; |
| } |
| /* It was only kept for port vlans, now make it real */ |
| err = br_fdb_insert(br, NULL, br->dev->dev_addr, |
| vlan->vid); |
| if (err) { |
| br_err(br, "failed to insert local address into bridge forwarding table\n"); |
| goto err_fdb_insert; |
| } |
| |
| refcount_inc(&vlan->refcnt); |
| vlan->flags |= BRIDGE_VLAN_INFO_BRENTRY; |
| vg->num_vlans++; |
| *changed = true; |
| } |
| |
| if (__vlan_add_flags(vlan, flags)) |
| *changed = true; |
| |
| return 0; |
| |
| err_fdb_insert: |
| err_flags: |
| br_switchdev_port_vlan_del(br->dev, vlan->vid); |
| return err; |
| } |
| |
| /* Must be protected by RTNL. |
| * Must be called with vid in range from 1 to 4094 inclusive. |
| * changed must be true only if the vlan was created or updated |
| */ |
| int br_vlan_add(struct net_bridge *br, u16 vid, u16 flags, bool *changed, |
| struct netlink_ext_ack *extack) |
| { |
| struct net_bridge_vlan_group *vg; |
| struct net_bridge_vlan *vlan; |
| int ret; |
| |
| ASSERT_RTNL(); |
| |
| *changed = false; |
| vg = br_vlan_group(br); |
| vlan = br_vlan_find(vg, vid); |
| if (vlan) |
| return br_vlan_add_existing(br, vg, vlan, flags, changed, |
| extack); |
| |
| vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); |
| if (!vlan) |
| return -ENOMEM; |
| |
| vlan->stats = netdev_alloc_pcpu_stats(struct br_vlan_stats); |
| if (!vlan->stats) { |
| kfree(vlan); |
| return -ENOMEM; |
| } |
| vlan->vid = vid; |
| vlan->flags = flags | BRIDGE_VLAN_INFO_MASTER; |
| vlan->flags &= ~BRIDGE_VLAN_INFO_PVID; |
| vlan->br = br; |
| if (flags & BRIDGE_VLAN_INFO_BRENTRY) |
| refcount_set(&vlan->refcnt, 1); |
| ret = __vlan_add(vlan, flags, extack); |
| if (ret) { |
| free_percpu(vlan->stats); |
| kfree(vlan); |
| } else { |
| *changed = true; |
| } |
| |
| return ret; |
| } |
| |
| /* Must be protected by RTNL. |
| * Must be called with vid in range from 1 to 4094 inclusive. |
| */ |
| int br_vlan_delete(struct net_bridge *br, u16 vid) |
| { |
| struct net_bridge_vlan_group *vg; |
| struct net_bridge_vlan *v; |
| |
| ASSERT_RTNL(); |
| |
| vg = br_vlan_group(br); |
| v = br_vlan_find(vg, vid); |
| if (!v || !br_vlan_is_brentry(v)) |
| return -ENOENT; |
| |
| br_fdb_find_delete_local(br, NULL, br->dev->dev_addr, vid); |
| br_fdb_delete_by_port(br, NULL, vid, 0); |
| |
| vlan_tunnel_info_del(vg, v); |
| |
| return __vlan_del(v); |
| } |
| |
| void br_vlan_flush(struct net_bridge *br) |
| { |
| struct net_bridge_vlan_group *vg; |
| |
| ASSERT_RTNL(); |
| |
| vg = br_vlan_group(br); |
| __vlan_flush(br, NULL, vg); |
| RCU_INIT_POINTER(br->vlgrp, NULL); |
| synchronize_rcu(); |
| __vlan_group_free(vg); |
| } |
| |
| struct net_bridge_vlan *br_vlan_find(struct net_bridge_vlan_group *vg, u16 vid) |
| { |
| if (!vg) |
| return NULL; |
| |
| return br_vlan_lookup(&vg->vlan_hash, vid); |
| } |
| |
| /* Must be protected by RTNL. */ |
| static void recalculate_group_addr(struct net_bridge *br) |
| { |
| if (br_opt_get(br, BROPT_GROUP_ADDR_SET)) |
| return; |
| |
| spin_lock_bh(&br->lock); |
| if (!br_opt_get(br, BROPT_VLAN_ENABLED) || |
| br->vlan_proto == htons(ETH_P_8021Q)) { |
| /* Bridge Group Address */ |
| br->group_addr[5] = 0x00; |
| } else { /* vlan_enabled && ETH_P_8021AD */ |
| /* Provider Bridge Group Address */ |
| br->group_addr[5] = 0x08; |
| } |
| spin_unlock_bh(&br->lock); |
| } |
| |
| /* Must be protected by RTNL. */ |
| void br_recalculate_fwd_mask(struct net_bridge *br) |
| { |
| if (!br_opt_get(br, BROPT_VLAN_ENABLED) || |
| br->vlan_proto == htons(ETH_P_8021Q)) |
| br->group_fwd_mask_required = BR_GROUPFWD_DEFAULT; |
| else /* vlan_enabled && ETH_P_8021AD */ |
| br->group_fwd_mask_required = BR_GROUPFWD_8021AD & |
| ~(1u << br->group_addr[5]); |
| } |
| |
| int __br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) |
| { |
| struct switchdev_attr attr = { |
| .orig_dev = br->dev, |
| .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, |
| .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, |
| .u.vlan_filtering = val, |
| }; |
| int err; |
| |
| if (br_opt_get(br, BROPT_VLAN_ENABLED) == !!val) |
| return 0; |
| |
| err = switchdev_port_attr_set(br->dev, &attr); |
| if (err && err != -EOPNOTSUPP) |
| return err; |
| |
| br_opt_toggle(br, BROPT_VLAN_ENABLED, !!val); |
| br_manage_promisc(br); |
| recalculate_group_addr(br); |
| br_recalculate_fwd_mask(br); |
| |
| return 0; |
| } |
| |
| int br_vlan_filter_toggle(struct net_bridge *br, unsigned long val) |
| { |
| return __br_vlan_filter_toggle(br, val); |
| } |
| |
| bool br_vlan_enabled(const struct net_device *dev) |
| { |
| struct net_bridge *br = netdev_priv(dev); |
| |
| return br_opt_get(br, BROPT_VLAN_ENABLED); |
| } |
| EXPORT_SYMBOL_GPL(br_vlan_enabled); |
| |
| int br_vlan_get_proto(const struct net_device *dev, u16 *p_proto) |
| { |
| struct net_bridge *br = netdev_priv(dev); |
| |
| *p_proto = ntohs(br->vlan_proto); |
| |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(br_vlan_get_proto); |
| |
| int __br_vlan_set_proto(struct net_bridge *br, __be16 proto) |
| { |
| int err = 0; |
| struct net_bridge_port *p; |
| struct net_bridge_vlan *vlan; |
| struct net_bridge_vlan_group *vg; |
| __be16 oldproto; |
| |
| if (br->vlan_proto == proto) |
| return 0; |
| |
| /* Add VLANs for the new proto to the device filter. */ |
| list_for_each_entry(p, &br->port_list, list) { |
| vg = nbp_vlan_group(p); |
| list_for_each_entry(vlan, &vg->vlan_list, vlist) { |
| err = vlan_vid_add(p->dev, proto, vlan->vid); |
| if (err) |
| goto err_filt; |
| } |
| } |
| |
| oldproto = br->vlan_proto; |
| br->vlan_proto = proto; |
| |
| recalculate_group_addr(br); |
| br_recalculate_fwd_mask(br); |
| |
| /* Delete VLANs for the old proto from the device filter. */ |
| list_for_each_entry(p, &br->port_list, list) { |
| vg = nbp_vlan_group(p); |
| list_for_each_entry(vlan, &vg->vlan_list, vlist) |
| vlan_vid_del(p->dev, oldproto, vlan->vid); |
| } |
| |
| return 0; |
| |
| err_filt: |
| list_for_each_entry_continue_reverse(vlan, &vg->vlan_list, vlist) |
| vlan_vid_del(p->dev, proto, vlan->vid); |
| |
| list_for_each_entry_continue_reverse(p, &br->port_list, list) { |
| vg = nbp_vlan_group(p); |
| list_for_each_entry(vlan, &vg->vlan_list, vlist) |
| vlan_vid_del(p->dev, proto, vlan->vid); |
| } |
| |
| return err; |
| } |
| |
| int br_vlan_set_proto(struct net_bridge *br, unsigned long val) |
| { |
| if (val != ETH_P_8021Q && val != ETH_P_8021AD) |
| return -EPROTONOSUPPORT; |
| |
| return __br_vlan_set_proto(br, htons(val)); |
| } |
| |
| int br_vlan_set_stats(struct net_bridge *br, unsigned long val) |
| { |
| switch (val) { |
| case 0: |
| case 1: |
| br_opt_toggle(br, BROPT_VLAN_STATS_ENABLED, !!val); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| int br_vlan_set_stats_per_port(struct net_bridge *br, unsigned long val) |
| { |
| struct net_bridge_port *p; |
| |
| /* allow to change the option if there are no port vlans configured */ |
| list_for_each_entry(p, &br->port_list, list) { |
| struct net_bridge_vlan_group *vg = nbp_vlan_group(p); |
| |
| if (vg->num_vlans) |
| return -EBUSY; |
| } |
| |
| switch (val) { |
| case 0: |
| case 1: |
| br_opt_toggle(br, BROPT_VLAN_STATS_PER_PORT, !!val); |
| break; |
| default: |
| return -EINVAL; |
| } |
| |
| return 0; |
| } |
| |
| static bool vlan_default_pvid(struct net_bridge_vlan_group *vg, u16 vid) |
| { |
| struct net_bridge_vlan *v; |
| |
| if (vid != vg->pvid) |
| return false; |
| |
| v = br_vlan_lookup(&vg->vlan_hash, vid); |
| if (v && br_vlan_should_use(v) && |
| (v->flags & BRIDGE_VLAN_INFO_UNTAGGED)) |
| return true; |
| |
| return false; |
| } |
| |
| static void br_vlan_disable_default_pvid(struct net_bridge *br) |
| { |
| struct net_bridge_port *p; |
| u16 pvid = br->default_pvid; |
| |
| /* Disable default_pvid on all ports where it is still |
| * configured. |
| */ |
| if (vlan_default_pvid(br_vlan_group(br), pvid)) { |
| if (!br_vlan_delete(br, pvid)) |
| br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN); |
| } |
| |
| list_for_each_entry(p, &br->port_list, list) { |
| if (vlan_default_pvid(nbp_vlan_group(p), pvid) && |
| !nbp_vlan_delete(p, pvid)) |
| br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN); |
| } |
| |
| br->default_pvid = 0; |
| } |
| |
| int __br_vlan_set_default_pvid(struct net_bridge *br, u16 pvid, |
| struct netlink_ext_ack *extack) |
| { |
| const struct net_bridge_vlan *pvent; |
| struct net_bridge_vlan_group *vg; |
| struct net_bridge_port *p; |
| unsigned long *changed; |
| bool vlchange; |
| u16 old_pvid; |
| int err = 0; |
| |
| if (!pvid) { |
| br_vlan_disable_default_pvid(br); |
| return 0; |
| } |
| |
| changed = bitmap_zalloc(BR_MAX_PORTS, GFP_KERNEL); |
| if (!changed) |
| return -ENOMEM; |
| |
| old_pvid = br->default_pvid; |
| |
| /* Update default_pvid config only if we do not conflict with |
| * user configuration. |
| */ |
| vg = br_vlan_group(br); |
| pvent = br_vlan_find(vg, pvid); |
| if ((!old_pvid || vlan_default_pvid(vg, old_pvid)) && |
| (!pvent || !br_vlan_should_use(pvent))) { |
| err = br_vlan_add(br, pvid, |
| BRIDGE_VLAN_INFO_PVID | |
| BRIDGE_VLAN_INFO_UNTAGGED | |
| BRIDGE_VLAN_INFO_BRENTRY, |
| &vlchange, extack); |
| if (err) |
| goto out; |
| |
| if (br_vlan_delete(br, old_pvid)) |
| br_vlan_notify(br, NULL, old_pvid, 0, RTM_DELVLAN); |
| br_vlan_notify(br, NULL, pvid, 0, RTM_NEWVLAN); |
| set_bit(0, changed); |
| } |
| |
| list_for_each_entry(p, &br->port_list, list) { |
| /* Update default_pvid config only if we do not conflict with |
| * user configuration. |
| */ |
| vg = nbp_vlan_group(p); |
| if ((old_pvid && |
| !vlan_default_pvid(vg, old_pvid)) || |
| br_vlan_find(vg, pvid)) |
| continue; |
| |
| err = nbp_vlan_add(p, pvid, |
| BRIDGE_VLAN_INFO_PVID | |
| BRIDGE_VLAN_INFO_UNTAGGED, |
| &vlchange, extack); |
| if (err) |
| goto err_port; |
| if (nbp_vlan_delete(p, old_pvid)) |
| br_vlan_notify(br, p, old_pvid, 0, RTM_DELVLAN); |
| br_vlan_notify(p->br, p, pvid, 0, RTM_NEWVLAN); |
| set_bit(p->port_no, changed); |
| } |
| |
| br->default_pvid = pvid; |
| |
| out: |
| bitmap_free(changed); |
| return err; |
| |
| err_port: |
| list_for_each_entry_continue_reverse(p, &br->port_list, list) { |
| if (!test_bit(p->port_no, changed)) |
| continue; |
| |
| if (old_pvid) { |
| nbp_vlan_add(p, old_pvid, |
| BRIDGE_VLAN_INFO_PVID | |
| BRIDGE_VLAN_INFO_UNTAGGED, |
| &vlchange, NULL); |
| br_vlan_notify(p->br, p, old_pvid, 0, RTM_NEWVLAN); |
| } |
| nbp_vlan_delete(p, pvid); |
| br_vlan_notify(br, p, pvid, 0, RTM_DELVLAN); |
| } |
| |
| if (test_bit(0, changed)) { |
| if (old_pvid) { |
| br_vlan_add(br, old_pvid, |
| BRIDGE_VLAN_INFO_PVID | |
| BRIDGE_VLAN_INFO_UNTAGGED | |
| BRIDGE_VLAN_INFO_BRENTRY, |
| &vlchange, NULL); |
| br_vlan_notify(br, NULL, old_pvid, 0, RTM_NEWVLAN); |
| } |
| br_vlan_delete(br, pvid); |
| br_vlan_notify(br, NULL, pvid, 0, RTM_DELVLAN); |
| } |
| goto out; |
| } |
| |
| int br_vlan_set_default_pvid(struct net_bridge *br, unsigned long val) |
| { |
| u16 pvid = val; |
| int err = 0; |
| |
| if (val >= VLAN_VID_MASK) |
| return -EINVAL; |
| |
| if (pvid == br->default_pvid) |
| goto out; |
| |
| /* Only allow default pvid change when filtering is disabled */ |
| if (br_opt_get(br, BROPT_VLAN_ENABLED)) { |
| pr_info_once("Please disable vlan filtering to change default_pvid\n"); |
| err = -EPERM; |
| goto out; |
| } |
| err = __br_vlan_set_default_pvid(br, pvid, NULL); |
| out: |
| return err; |
| } |
| |
| int br_vlan_init(struct net_bridge *br) |
| { |
| struct net_bridge_vlan_group *vg; |
| int ret = -ENOMEM; |
| |
| vg = kzalloc(sizeof(*vg), GFP_KERNEL); |
| if (!vg) |
| goto out; |
| ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); |
| if (ret) |
| goto err_rhtbl; |
| ret = vlan_tunnel_init(vg); |
| if (ret) |
| goto err_tunnel_init; |
| INIT_LIST_HEAD(&vg->vlan_list); |
| br->vlan_proto = htons(ETH_P_8021Q); |
| br->default_pvid = 1; |
| rcu_assign_pointer(br->vlgrp, vg); |
| |
| out: |
| return ret; |
| |
| err_tunnel_init: |
| rhashtable_destroy(&vg->vlan_hash); |
| err_rhtbl: |
| kfree(vg); |
| |
| goto out; |
| } |
| |
| int nbp_vlan_init(struct net_bridge_port *p, struct netlink_ext_ack *extack) |
| { |
| struct switchdev_attr attr = { |
| .orig_dev = p->br->dev, |
| .id = SWITCHDEV_ATTR_ID_BRIDGE_VLAN_FILTERING, |
| .flags = SWITCHDEV_F_SKIP_EOPNOTSUPP, |
| .u.vlan_filtering = br_opt_get(p->br, BROPT_VLAN_ENABLED), |
| }; |
| struct net_bridge_vlan_group *vg; |
| int ret = -ENOMEM; |
| |
| vg = kzalloc(sizeof(struct net_bridge_vlan_group), GFP_KERNEL); |
| if (!vg) |
| goto out; |
| |
| ret = switchdev_port_attr_set(p->dev, &attr); |
| if (ret && ret != -EOPNOTSUPP) |
| goto err_vlan_enabled; |
| |
| ret = rhashtable_init(&vg->vlan_hash, &br_vlan_rht_params); |
| if (ret) |
| goto err_rhtbl; |
| ret = vlan_tunnel_init(vg); |
| if (ret) |
| goto err_tunnel_init; |
| INIT_LIST_HEAD(&vg->vlan_list); |
| rcu_assign_pointer(p->vlgrp, vg); |
| if (p->br->default_pvid) { |
| bool changed; |
| |
| ret = nbp_vlan_add(p, p->br->default_pvid, |
| BRIDGE_VLAN_INFO_PVID | |
| BRIDGE_VLAN_INFO_UNTAGGED, |
| &changed, extack); |
| if (ret) |
| goto err_vlan_add; |
| br_vlan_notify(p->br, p, p->br->default_pvid, 0, RTM_NEWVLAN); |
| } |
| out: |
| return ret; |
| |
| err_vlan_add: |
| RCU_INIT_POINTER(p->vlgrp, NULL); |
| synchronize_rcu(); |
| vlan_tunnel_deinit(vg); |
| err_tunnel_init: |
| rhashtable_destroy(&vg->vlan_hash); |
| err_rhtbl: |
| err_vlan_enabled: |
| kfree(vg); |
| |
| goto out; |
| } |
| |
| /* Must be protected by RTNL. |
| * Must be called with vid in range from 1 to 4094 inclusive. |
| * changed must be true only if the vlan was created or updated |
| */ |
| int nbp_vlan_add(struct net_bridge_port *port, u16 vid, u16 flags, |
| bool *changed, struct netlink_ext_ack *extack) |
| { |
| struct net_bridge_vlan *vlan; |
| int ret; |
| |
| ASSERT_RTNL(); |
| |
| *changed = false; |
| vlan = br_vlan_find(nbp_vlan_group(port), vid); |
| if (vlan) { |
| /* Pass the flags to the hardware bridge */ |
| ret = br_switchdev_port_vlan_add(port->dev, vid, flags, extack); |
| if (ret && ret != -EOPNOTSUPP) |
| return ret; |
| *changed = __vlan_add_flags(vlan, flags); |
| |
| return 0; |
| } |
| |
| vlan = kzalloc(sizeof(*vlan), GFP_KERNEL); |
| if (!vlan) |
| return -ENOMEM; |
| |
| vlan->vid = vid; |
| vlan->port = port; |
| ret = __vlan_add(vlan, flags, extack); |
| if (ret) |
| kfree(vlan); |
| else |
| *changed = true; |
| |
| return ret; |
| } |
| |
| /* Must be protected by RTNL. |
| * Must be called with vid in range from 1 to 4094 inclusive. |
| */ |
| int nbp_vlan_delete(struct net_bridge_port *port, u16 vid) |
| { |
| struct net_bridge_vlan *v; |
| |
| ASSERT_RTNL(); |
| |
| v = br_vlan_find(nbp_vlan_group(port), vid); |
| if (!v) |
| return -ENOENT; |
| br_fdb_find_delete_local(port->br, port, port->dev->dev_addr, vid); |
| br_fdb_delete_by_port(port->br, port, vid, 0); |
| |
| return __vlan_del(v); |
| } |
| |
| void nbp_vlan_flush(struct net_bridge_port *port) |
| { |
| struct net_bridge_vlan_group *vg; |
| |
| ASSERT_RTNL(); |
| |
| vg = nbp_vlan_group(port); |
| __vlan_flush(port->br, port, vg); |
| RCU_INIT_POINTER(port->vlgrp, NULL); |
| synchronize_rcu(); |
| __vlan_group_free(vg); |
| } |
| |
| void br_vlan_get_stats(const struct net_bridge_vlan *v, |
| struct br_vlan_stats *stats) |
| { |
| int i; |
| |
| memset(stats, 0, sizeof(*stats)); |
| for_each_possible_cpu(i) { |
| u64 rxpackets, rxbytes, txpackets, txbytes; |
| struct br_vlan_stats *cpu_stats; |
| unsigned int start; |
| |
| cpu_stats = per_cpu_ptr(v->stats, i); |
| do { |
| start = u64_stats_fetch_begin_irq(&cpu_stats->syncp); |
| rxpackets = cpu_stats->rx_packets; |
| rxbytes = cpu_stats->rx_bytes; |
| txbytes = cpu_stats->tx_bytes; |
| txpackets = cpu_stats->tx_packets; |
| } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start)); |
| |
| stats->rx_packets += rxpackets; |
| stats->rx_bytes += rxbytes; |
| stats->tx_bytes += txbytes; |
| stats->tx_packets += txpackets; |
| } |
| } |
| |
| int br_vlan_get_pvid(const struct net_device *dev, u16 *p_pvid) |
| { |
| struct net_bridge_vlan_group *vg; |
| struct net_bridge_port *p; |
| |
| ASSERT_RTNL(); |
| p = br_port_get_check_rtnl(dev); |
| if (p) |
| vg = nbp_vlan_group(p); |
| else if (netif_is_bridge_master(dev)) |
| vg = br_vlan_group(netdev_priv(dev)); |
| else |
| return -EINVAL; |
| |
| *p_pvid = br_get_pvid(vg); |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(br_vlan_get_pvid); |
| |
| int br_vlan_get_pvid_rcu(const struct net_device *dev, u16 *p_pvid) |
| { |
| struct net_bridge_vlan_group *vg; |
| struct net_bridge_port *p; |
| |
| p = br_port_get_check_rcu(dev); |
| if (p) |
| vg = nbp_vlan_group_rcu(p); |
| else if (netif_is_bridge_master(dev)) |
| vg = br_vlan_group_rcu(netdev_priv(dev)); |
| else |
| return -EINVAL; |
| |
| *p_pvid = br_get_pvid(vg); |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(br_vlan_get_pvid_rcu); |
| |
| int br_vlan_get_info(const struct net_device *dev, u16 vid, |
| struct bridge_vlan_info *p_vinfo) |
| { |
| struct net_bridge_vlan_group *vg; |
| struct net_bridge_vlan *v; |
| struct net_bridge_port *p; |
| |
| ASSERT_RTNL(); |
| p = br_port_get_check_rtnl(dev); |
| if (p) |
| vg = nbp_vlan_group(p); |
| else if (netif_is_bridge_master(dev)) |
| vg = br_vlan_group(netdev_priv(dev)); |
| else |
| return -EINVAL; |
| |
| v = br_vlan_find(vg, vid); |
| if (!v) |
| return -ENOENT; |
| |
| p_vinfo->vid = vid; |
| p_vinfo->flags = v->flags; |
| if (vid == br_get_pvid(vg)) |
| p_vinfo->flags |= BRIDGE_VLAN_INFO_PVID; |
| return 0; |
| } |
| EXPORT_SYMBOL_GPL(br_vlan_get_info); |
| |
| static int br_vlan_is_bind_vlan_dev(const struct net_device *dev) |
| { |
| return is_vlan_dev(dev) && |
| !!(vlan_dev_priv(dev)->flags & VLAN_FLAG_BRIDGE_BINDING); |
| } |
| |
| static int br_vlan_is_bind_vlan_dev_fn(struct net_device *dev, |
| __always_unused struct netdev_nested_priv *priv) |
| { |
| return br_vlan_is_bind_vlan_dev(dev); |
| } |
| |
| static bool br_vlan_has_upper_bind_vlan_dev(struct net_device *dev) |
| { |
| int found; |
| |
| rcu_read_lock(); |
| found = netdev_walk_all_upper_dev_rcu(dev, br_vlan_is_bind_vlan_dev_fn, |
| NULL); |
| rcu_read_unlock(); |
| |
| return !!found; |
| } |
| |
| struct br_vlan_bind_walk_data { |
| u16 vid; |
| struct net_device *result; |
| }; |
| |
| static int br_vlan_match_bind_vlan_dev_fn(struct net_device *dev, |
| struct netdev_nested_priv *priv) |
| { |
| struct br_vlan_bind_walk_data *data = priv->data; |
| int found = 0; |
| |
| if (br_vlan_is_bind_vlan_dev(dev) && |
| vlan_dev_priv(dev)->vlan_id == data->vid) { |
| data->result = dev; |
| found = 1; |
| } |
| |
| return found; |
| } |
| |
| static struct net_device * |
| br_vlan_get_upper_bind_vlan_dev(struct net_device *dev, u16 vid) |
| { |
| struct br_vlan_bind_walk_data data = { |
| .vid = vid, |
| }; |
| struct netdev_nested_priv priv = { |
| .data = (void *)&data, |
| }; |
| |
| rcu_read_lock(); |
| netdev_walk_all_upper_dev_rcu(dev, br_vlan_match_bind_vlan_dev_fn, |
| &priv); |
| rcu_read_unlock(); |
| |
| return data.result; |
| } |
| |
| static bool br_vlan_is_dev_up(const struct net_device *dev) |
| { |
| return !!(dev->flags & IFF_UP) && netif_oper_up(dev); |
| } |
| |
| static void br_vlan_set_vlan_dev_state(const struct net_bridge *br, |
| struct net_device *vlan_dev) |
| { |
| u16 vid = vlan_dev_priv(vlan_dev)->vlan_id; |
| struct net_bridge_vlan_group *vg; |
| struct net_bridge_port *p; |
| bool has_carrier = false; |
| |
| if (!netif_carrier_ok(br->dev)) { |
| netif_carrier_off(vlan_dev); |
| return; |
| } |
| |
| list_for_each_entry(p, &br->port_list, list) { |
| vg = nbp_vlan_group(p); |
| if (br_vlan_find(vg, vid) && br_vlan_is_dev_up(p->dev)) { |
| has_carrier = true; |
| break; |
| } |
| } |
| |
| if (has_carrier) |
| netif_carrier_on(vlan_dev); |
| else |
| netif_carrier_off(vlan_dev); |
| } |
| |
| static void br_vlan_set_all_vlan_dev_state(struct net_bridge_port *p) |
| { |
| struct net_bridge_vlan_group *vg = nbp_vlan_group(p); |
| struct net_bridge_vlan *vlan; |
| struct net_device *vlan_dev; |
| |
| list_for_each_entry(vlan, &vg->vlan_list, vlist) { |
| vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, |
| vlan->vid); |
| if (vlan_dev) { |
| if (br_vlan_is_dev_up(p->dev)) { |
| if (netif_carrier_ok(p->br->dev)) |
| netif_carrier_on(vlan_dev); |
| } else { |
| br_vlan_set_vlan_dev_state(p->br, vlan_dev); |
| } |
| } |
| } |
| } |
| |
| static void br_vlan_upper_change(struct net_device *dev, |
| struct net_device *upper_dev, |
| bool linking) |
| { |
| struct net_bridge *br = netdev_priv(dev); |
| |
| if (!br_vlan_is_bind_vlan_dev(upper_dev)) |
| return; |
| |
| if (linking) { |
| br_vlan_set_vlan_dev_state(br, upper_dev); |
| br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, true); |
| } else { |
| br_opt_toggle(br, BROPT_VLAN_BRIDGE_BINDING, |
| br_vlan_has_upper_bind_vlan_dev(dev)); |
| } |
| } |
| |
| struct br_vlan_link_state_walk_data { |
| struct net_bridge *br; |
| }; |
| |
| static int br_vlan_link_state_change_fn(struct net_device *vlan_dev, |
| struct netdev_nested_priv *priv) |
| { |
| struct br_vlan_link_state_walk_data *data = priv->data; |
| |
| if (br_vlan_is_bind_vlan_dev(vlan_dev)) |
| br_vlan_set_vlan_dev_state(data->br, vlan_dev); |
| |
| return 0; |
| } |
| |
| static void br_vlan_link_state_change(struct net_device *dev, |
| struct net_bridge *br) |
| { |
| struct br_vlan_link_state_walk_data data = { |
| .br = br |
| }; |
| struct netdev_nested_priv priv = { |
| .data = (void *)&data, |
| }; |
| |
| rcu_read_lock(); |
| netdev_walk_all_upper_dev_rcu(dev, br_vlan_link_state_change_fn, |
| &priv); |
| rcu_read_unlock(); |
| } |
| |
| /* Must be protected by RTNL. */ |
| static void nbp_vlan_set_vlan_dev_state(struct net_bridge_port *p, u16 vid) |
| { |
| struct net_device *vlan_dev; |
| |
| if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) |
| return; |
| |
| vlan_dev = br_vlan_get_upper_bind_vlan_dev(p->br->dev, vid); |
| if (vlan_dev) |
| br_vlan_set_vlan_dev_state(p->br, vlan_dev); |
| } |
| |
| /* Must be protected by RTNL. */ |
| int br_vlan_bridge_event(struct net_device *dev, unsigned long event, void *ptr) |
| { |
| struct netdev_notifier_changeupper_info *info; |
| struct net_bridge *br = netdev_priv(dev); |
| int vlcmd = 0, ret = 0; |
| bool changed = false; |
| |
| switch (event) { |
| case NETDEV_REGISTER: |
| ret = br_vlan_add(br, br->default_pvid, |
| BRIDGE_VLAN_INFO_PVID | |
| BRIDGE_VLAN_INFO_UNTAGGED | |
| BRIDGE_VLAN_INFO_BRENTRY, &changed, NULL); |
| vlcmd = RTM_NEWVLAN; |
| break; |
| case NETDEV_UNREGISTER: |
| changed = !br_vlan_delete(br, br->default_pvid); |
| vlcmd = RTM_DELVLAN; |
| break; |
| case NETDEV_CHANGEUPPER: |
| info = ptr; |
| br_vlan_upper_change(dev, info->upper_dev, info->linking); |
| break; |
| |
| case NETDEV_CHANGE: |
| case NETDEV_UP: |
| if (!br_opt_get(br, BROPT_VLAN_BRIDGE_BINDING)) |
| break; |
| br_vlan_link_state_change(dev, br); |
| break; |
| } |
| if (changed) |
| br_vlan_notify(br, NULL, br->default_pvid, 0, vlcmd); |
| |
| return ret; |
| } |
| |
| /* Must be protected by RTNL. */ |
| void br_vlan_port_event(struct net_bridge_port *p, unsigned long event) |
| { |
| if (!br_opt_get(p->br, BROPT_VLAN_BRIDGE_BINDING)) |
| return; |
| |
| switch (event) { |
| case NETDEV_CHANGE: |
| case NETDEV_DOWN: |
| case NETDEV_UP: |
| br_vlan_set_all_vlan_dev_state(p); |
| break; |
| } |
| } |
| |
| static bool br_vlan_stats_fill(struct sk_buff *skb, |
| const struct net_bridge_vlan *v) |
| { |
| struct br_vlan_stats stats; |
| struct nlattr *nest; |
| |
| nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY_STATS); |
| if (!nest) |
| return false; |
| |
| br_vlan_get_stats(v, &stats); |
| if (nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_BYTES, stats.rx_bytes, |
| BRIDGE_VLANDB_STATS_PAD) || |
| nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_RX_PACKETS, |
| stats.rx_packets, BRIDGE_VLANDB_STATS_PAD) || |
| nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_BYTES, stats.tx_bytes, |
| BRIDGE_VLANDB_STATS_PAD) || |
| nla_put_u64_64bit(skb, BRIDGE_VLANDB_STATS_TX_PACKETS, |
| stats.tx_packets, BRIDGE_VLANDB_STATS_PAD)) |
| goto out_err; |
| |
| nla_nest_end(skb, nest); |
| |
| return true; |
| |
| out_err: |
| nla_nest_cancel(skb, nest); |
| return false; |
| } |
| |
| /* v_opts is used to dump the options which must be equal in the whole range */ |
| static bool br_vlan_fill_vids(struct sk_buff *skb, u16 vid, u16 vid_range, |
| const struct net_bridge_vlan *v_opts, |
| u16 flags, |
| bool dump_stats) |
| { |
| struct bridge_vlan_info info; |
| struct nlattr *nest; |
| |
| nest = nla_nest_start(skb, BRIDGE_VLANDB_ENTRY); |
| if (!nest) |
| return false; |
| |
| memset(&info, 0, sizeof(info)); |
| info.vid = vid; |
| if (flags & BRIDGE_VLAN_INFO_UNTAGGED) |
| info.flags |= BRIDGE_VLAN_INFO_UNTAGGED; |
| if (flags & BRIDGE_VLAN_INFO_PVID) |
| info.flags |= BRIDGE_VLAN_INFO_PVID; |
| |
| if (nla_put(skb, BRIDGE_VLANDB_ENTRY_INFO, sizeof(info), &info)) |
| goto out_err; |
| |
| if (vid_range && vid < vid_range && |
| !(flags & BRIDGE_VLAN_INFO_PVID) && |
| nla_put_u16(skb, BRIDGE_VLANDB_ENTRY_RANGE, vid_range)) |
| goto out_err; |
| |
| if (v_opts) { |
| if (!br_vlan_opts_fill(skb, v_opts)) |
| goto out_err; |
| |
| if (dump_stats && !br_vlan_stats_fill(skb, v_opts)) |
| goto out_err; |
| } |
| |
| nla_nest_end(skb, nest); |
| |
| return true; |
| |
| out_err: |
| nla_nest_cancel(skb, nest); |
| return false; |
| } |
| |
| static size_t rtnl_vlan_nlmsg_size(void) |
| { |
| return NLMSG_ALIGN(sizeof(struct br_vlan_msg)) |
| + nla_total_size(0) /* BRIDGE_VLANDB_ENTRY */ |
| + nla_total_size(sizeof(u16)) /* BRIDGE_VLANDB_ENTRY_RANGE */ |
| + nla_total_size(sizeof(struct bridge_vlan_info)) /* BRIDGE_VLANDB_ENTRY_INFO */ |
| + br_vlan_opts_nl_size(); /* bridge vlan options */ |
| } |
| |
| void br_vlan_notify(const struct net_bridge *br, |
| const struct net_bridge_port *p, |
| u16 vid, u16 vid_range, |
| int cmd) |
| { |
| struct net_bridge_vlan_group *vg; |
| struct net_bridge_vlan *v = NULL; |
| struct br_vlan_msg *bvm; |
| struct nlmsghdr *nlh; |
| struct sk_buff *skb; |
| int err = -ENOBUFS; |
| struct net *net; |
| u16 flags = 0; |
| int ifindex; |
| |
| /* right now notifications are done only with rtnl held */ |
| ASSERT_RTNL(); |
| |
| if (p) { |
| ifindex = p->dev->ifindex; |
| vg = nbp_vlan_group(p); |
| net = dev_net(p->dev); |
| } else { |
| ifindex = br->dev->ifindex; |
| vg = br_vlan_group(br); |
| net = dev_net(br->dev); |
| } |
| |
| skb = nlmsg_new(rtnl_vlan_nlmsg_size(), GFP_KERNEL); |
| if (!skb) |
| goto out_err; |
| |
| err = -EMSGSIZE; |
| nlh = nlmsg_put(skb, 0, 0, cmd, sizeof(*bvm), 0); |
| if (!nlh) |
| goto out_err; |
| bvm = nlmsg_data(nlh); |
| memset(bvm, 0, sizeof(*bvm)); |
| bvm->family = AF_BRIDGE; |
| bvm->ifindex = ifindex; |
| |
| switch (cmd) { |
| case RTM_NEWVLAN: |
| /* need to find the vlan due to flags/options */ |
| v = br_vlan_find(vg, vid); |
| if (!v || !br_vlan_should_use(v)) |
| goto out_kfree; |
| |
| flags = v->flags; |
| if (br_get_pvid(vg) == v->vid) |
| flags |= BRIDGE_VLAN_INFO_PVID; |
| break; |
| case RTM_DELVLAN: |
| break; |
| default: |
| goto out_kfree; |
| } |
| |
| if (!br_vlan_fill_vids(skb, vid, vid_range, v, flags, false)) |
| goto out_err; |
| |
| nlmsg_end(skb, nlh); |
| rtnl_notify(skb, net, 0, RTNLGRP_BRVLAN, NULL, GFP_KERNEL); |
| return; |
| |
| out_err: |
| rtnl_set_sk_err(net, RTNLGRP_BRVLAN, err); |
| out_kfree: |
| kfree_skb(skb); |
| } |
| |
| /* check if v_curr can enter a range ending in range_end */ |
| bool br_vlan_can_enter_range(const struct net_bridge_vlan *v_curr, |
| const struct net_bridge_vlan *range_end) |
| { |
| return v_curr->vid - range_end->vid == 1 && |
| range_end->flags == v_curr->flags && |
| br_vlan_opts_eq_range(v_curr, range_end); |
| } |
| |
| static int br_vlan_dump_dev(const struct net_device *dev, |
| struct sk_buff *skb, |
| struct netlink_callback *cb, |
| u32 dump_flags) |
| { |
| struct net_bridge_vlan *v, *range_start = NULL, *range_end = NULL; |
| bool dump_stats = !!(dump_flags & BRIDGE_VLANDB_DUMPF_STATS); |
| struct net_bridge_vlan_group *vg; |
| int idx = 0, s_idx = cb->args[1]; |
| struct nlmsghdr *nlh = NULL; |
| struct net_bridge_port *p; |
| struct br_vlan_msg *bvm; |
| struct net_bridge *br; |
| int err = 0; |
| u16 pvid; |
| |
| if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) |
| return -EINVAL; |
| |
| if (netif_is_bridge_master(dev)) { |
| br = netdev_priv(dev); |
| vg = br_vlan_group_rcu(br); |
| p = NULL; |
| } else { |
| p = br_port_get_rcu(dev); |
| if (WARN_ON(!p)) |
| return -EINVAL; |
| vg = nbp_vlan_group_rcu(p); |
| br = p->br; |
| } |
| |
| if (!vg) |
| return 0; |
| |
| nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, |
| RTM_NEWVLAN, sizeof(*bvm), NLM_F_MULTI); |
| if (!nlh) |
| return -EMSGSIZE; |
| bvm = nlmsg_data(nlh); |
| memset(bvm, 0, sizeof(*bvm)); |
| bvm->family = PF_BRIDGE; |
| bvm->ifindex = dev->ifindex; |
| pvid = br_get_pvid(vg); |
| |
| /* idx must stay at range's beginning until it is filled in */ |
| list_for_each_entry_rcu(v, &vg->vlan_list, vlist) { |
| if (!br_vlan_should_use(v)) |
| continue; |
| if (idx < s_idx) { |
| idx++; |
| continue; |
| } |
| |
| if (!range_start) { |
| range_start = v; |
| range_end = v; |
| continue; |
| } |
| |
| if (dump_stats || v->vid == pvid || |
| !br_vlan_can_enter_range(v, range_end)) { |
| u16 vlan_flags = br_vlan_flags(range_start, pvid); |
| |
| if (!br_vlan_fill_vids(skb, range_start->vid, |
| range_end->vid, range_start, |
| vlan_flags, dump_stats)) { |
| err = -EMSGSIZE; |
| break; |
| } |
| /* advance number of filled vlans */ |
| idx += range_end->vid - range_start->vid + 1; |
| |
| range_start = v; |
| } |
| range_end = v; |
| } |
| |
| /* err will be 0 and range_start will be set in 3 cases here: |
| * - first vlan (range_start == range_end) |
| * - last vlan (range_start == range_end, not in range) |
| * - last vlan range (range_start != range_end, in range) |
| */ |
| if (!err && range_start && |
| !br_vlan_fill_vids(skb, range_start->vid, range_end->vid, |
| range_start, br_vlan_flags(range_start, pvid), |
| dump_stats)) |
| err = -EMSGSIZE; |
| |
| cb->args[1] = err ? idx : 0; |
| |
| nlmsg_end(skb, nlh); |
| |
| return err; |
| } |
| |
| static const struct nla_policy br_vlan_db_dump_pol[BRIDGE_VLANDB_DUMP_MAX + 1] = { |
| [BRIDGE_VLANDB_DUMP_FLAGS] = { .type = NLA_U32 }, |
| }; |
| |
| static int br_vlan_rtm_dump(struct sk_buff *skb, struct netlink_callback *cb) |
| { |
| struct nlattr *dtb[BRIDGE_VLANDB_DUMP_MAX + 1]; |
| int idx = 0, err = 0, s_idx = cb->args[0]; |
| struct net *net = sock_net(skb->sk); |
| struct br_vlan_msg *bvm; |
| struct net_device *dev; |
| u32 dump_flags = 0; |
| |
| err = nlmsg_parse(cb->nlh, sizeof(*bvm), dtb, BRIDGE_VLANDB_DUMP_MAX, |
| br_vlan_db_dump_pol, cb->extack); |
| if (err < 0) |
| return err; |
| |
| bvm = nlmsg_data(cb->nlh); |
| if (dtb[BRIDGE_VLANDB_DUMP_FLAGS]) |
| dump_flags = nla_get_u32(dtb[BRIDGE_VLANDB_DUMP_FLAGS]); |
| |
| rcu_read_lock(); |
| if (bvm->ifindex) { |
| dev = dev_get_by_index_rcu(net, bvm->ifindex); |
| if (!dev) { |
| err = -ENODEV; |
| goto out_err; |
| } |
| err = br_vlan_dump_dev(dev, skb, cb, dump_flags); |
| if (err && err != -EMSGSIZE) |
| goto out_err; |
| } else { |
| for_each_netdev_rcu(net, dev) { |
| if (idx < s_idx) |
| goto skip; |
| |
| err = br_vlan_dump_dev(dev, skb, cb, dump_flags); |
| if (err == -EMSGSIZE) |
| break; |
| skip: |
| idx++; |
| } |
| } |
| cb->args[0] = idx; |
| rcu_read_unlock(); |
| |
| return skb->len; |
| |
| out_err: |
| rcu_read_unlock(); |
| |
| return err; |
| } |
| |
| static const struct nla_policy br_vlan_db_policy[BRIDGE_VLANDB_ENTRY_MAX + 1] = { |
| [BRIDGE_VLANDB_ENTRY_INFO] = { .type = NLA_EXACT_LEN, |
| .len = sizeof(struct bridge_vlan_info) }, |
| [BRIDGE_VLANDB_ENTRY_RANGE] = { .type = NLA_U16 }, |
| [BRIDGE_VLANDB_ENTRY_STATE] = { .type = NLA_U8 }, |
| [BRIDGE_VLANDB_ENTRY_TUNNEL_INFO] = { .type = NLA_NESTED }, |
| }; |
| |
| static int br_vlan_rtm_process_one(struct net_device *dev, |
| const struct nlattr *attr, |
| int cmd, struct netlink_ext_ack *extack) |
| { |
| struct bridge_vlan_info *vinfo, vrange_end, *vinfo_last = NULL; |
| struct nlattr *tb[BRIDGE_VLANDB_ENTRY_MAX + 1]; |
| bool changed = false, skip_processing = false; |
| struct net_bridge_vlan_group *vg; |
| struct net_bridge_port *p = NULL; |
| int err = 0, cmdmap = 0; |
| struct net_bridge *br; |
| |
| if (netif_is_bridge_master(dev)) { |
| br = netdev_priv(dev); |
| vg = br_vlan_group(br); |
| } else { |
| p = br_port_get_rtnl(dev); |
| if (WARN_ON(!p)) |
| return -ENODEV; |
| br = p->br; |
| vg = nbp_vlan_group(p); |
| } |
| |
| if (WARN_ON(!vg)) |
| return -ENODEV; |
| |
| err = nla_parse_nested(tb, BRIDGE_VLANDB_ENTRY_MAX, attr, |
| br_vlan_db_policy, extack); |
| if (err) |
| return err; |
| |
| if (!tb[BRIDGE_VLANDB_ENTRY_INFO]) { |
| NL_SET_ERR_MSG_MOD(extack, "Missing vlan entry info"); |
| return -EINVAL; |
| } |
| memset(&vrange_end, 0, sizeof(vrange_end)); |
| |
| vinfo = nla_data(tb[BRIDGE_VLANDB_ENTRY_INFO]); |
| if (vinfo->flags & (BRIDGE_VLAN_INFO_RANGE_BEGIN | |
| BRIDGE_VLAN_INFO_RANGE_END)) { |
| NL_SET_ERR_MSG_MOD(extack, "Old-style vlan ranges are not allowed when using RTM vlan calls"); |
| return -EINVAL; |
| } |
| if (!br_vlan_valid_id(vinfo->vid, extack)) |
| return -EINVAL; |
| |
| if (tb[BRIDGE_VLANDB_ENTRY_RANGE]) { |
| vrange_end.vid = nla_get_u16(tb[BRIDGE_VLANDB_ENTRY_RANGE]); |
| /* validate user-provided flags without RANGE_BEGIN */ |
| vrange_end.flags = BRIDGE_VLAN_INFO_RANGE_END | vinfo->flags; |
| vinfo->flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN; |
| |
| /* vinfo_last is the range start, vinfo the range end */ |
| vinfo_last = vinfo; |
| vinfo = &vrange_end; |
| |
| if (!br_vlan_valid_id(vinfo->vid, extack) || |
| !br_vlan_valid_range(vinfo, vinfo_last, extack)) |
| return -EINVAL; |
| } |
| |
| switch (cmd) { |
| case RTM_NEWVLAN: |
| cmdmap = RTM_SETLINK; |
| skip_processing = !!(vinfo->flags & BRIDGE_VLAN_INFO_ONLY_OPTS); |
| break; |
| case RTM_DELVLAN: |
| cmdmap = RTM_DELLINK; |
| break; |
| } |
| |
| if (!skip_processing) { |
| struct bridge_vlan_info *tmp_last = vinfo_last; |
| |
| /* br_process_vlan_info may overwrite vinfo_last */ |
| err = br_process_vlan_info(br, p, cmdmap, vinfo, &tmp_last, |
| &changed, extack); |
| |
| /* notify first if anything changed */ |
| if (changed) |
| br_ifinfo_notify(cmdmap, br, p); |
| |
| if (err) |
| return err; |
| } |
| |
| /* deal with options */ |
| if (cmd == RTM_NEWVLAN) { |
| struct net_bridge_vlan *range_start, *range_end; |
| |
| if (vinfo_last) { |
| range_start = br_vlan_find(vg, vinfo_last->vid); |
| range_end = br_vlan_find(vg, vinfo->vid); |
| } else { |
| range_start = br_vlan_find(vg, vinfo->vid); |
| range_end = range_start; |
| } |
| |
| err = br_vlan_process_options(br, p, range_start, range_end, |
| tb, extack); |
| } |
| |
| return err; |
| } |
| |
| static int br_vlan_rtm_process(struct sk_buff *skb, struct nlmsghdr *nlh, |
| struct netlink_ext_ack *extack) |
| { |
| struct net *net = sock_net(skb->sk); |
| struct br_vlan_msg *bvm; |
| struct net_device *dev; |
| struct nlattr *attr; |
| int err, vlans = 0; |
| int rem; |
| |
| /* this should validate the header and check for remaining bytes */ |
| err = nlmsg_parse(nlh, sizeof(*bvm), NULL, BRIDGE_VLANDB_MAX, NULL, |
| extack); |
| if (err < 0) |
| return err; |
| |
| bvm = nlmsg_data(nlh); |
| dev = __dev_get_by_index(net, bvm->ifindex); |
| if (!dev) |
| return -ENODEV; |
| |
| if (!netif_is_bridge_master(dev) && !netif_is_bridge_port(dev)) { |
| NL_SET_ERR_MSG_MOD(extack, "The device is not a valid bridge or bridge port"); |
| return -EINVAL; |
| } |
| |
| nlmsg_for_each_attr(attr, nlh, sizeof(*bvm), rem) { |
| if (nla_type(attr) != BRIDGE_VLANDB_ENTRY) |
| continue; |
| |
| vlans++; |
| err = br_vlan_rtm_process_one(dev, attr, nlh->nlmsg_type, |
| extack); |
| if (err) |
| break; |
| } |
| if (!vlans) { |
| NL_SET_ERR_MSG_MOD(extack, "No vlans found to process"); |
| err = -EINVAL; |
| } |
| |
| return err; |
| } |
| |
| void br_vlan_rtnl_init(void) |
| { |
| rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETVLAN, NULL, |
| br_vlan_rtm_dump, 0); |
| rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWVLAN, |
| br_vlan_rtm_process, NULL, 0); |
| rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELVLAN, |
| br_vlan_rtm_process, NULL, 0); |
| } |
| |
| void br_vlan_rtnl_uninit(void) |
| { |
| rtnl_unregister(PF_BRIDGE, RTM_GETVLAN); |
| rtnl_unregister(PF_BRIDGE, RTM_NEWVLAN); |
| rtnl_unregister(PF_BRIDGE, RTM_DELVLAN); |
| } |