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vxlan: Use linked list to traverse FDB entries
In preparation for removing the fixed size hash table, convert FDB entry traversal to use the newly added FDB linked list. No functional changes intended. Reviewed-by: Petr Machata <petrm@nvidia.com> Signed-off-by: Ido Schimmel <idosch@nvidia.com> Link: https://patch.msgid.link/20250415121143.345227-9-idosch@nvidia.com Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org> Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Ido Schimmel
Paolo Abeni
parent
8d45673d2d
commit
7aa0dc750d
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@ -517,7 +517,6 @@ int vxlan_fdb_replay(const struct net_device *dev, __be32 vni,
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struct vxlan_dev *vxlan;
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struct vxlan_rdst *rdst;
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struct vxlan_fdb *f;
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unsigned int h;
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int rc = 0;
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if (!netif_is_vxlan(dev))
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@ -525,16 +524,13 @@ int vxlan_fdb_replay(const struct net_device *dev, __be32 vni,
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vxlan = netdev_priv(dev);
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spin_lock_bh(&vxlan->hash_lock);
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for (h = 0; h < FDB_HASH_SIZE; ++h) {
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hlist_for_each_entry(f, &vxlan->fdb_head[h], hlist) {
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if (f->vni == vni) {
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list_for_each_entry(rdst, &f->remotes, list) {
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rc = vxlan_fdb_notify_one(nb, vxlan,
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f, rdst,
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extack);
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if (rc)
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goto unlock;
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}
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hlist_for_each_entry(f, &vxlan->fdb_list, fdb_node) {
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if (f->vni == vni) {
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list_for_each_entry(rdst, &f->remotes, list) {
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rc = vxlan_fdb_notify_one(nb, vxlan, f, rdst,
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extack);
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if (rc)
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goto unlock;
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}
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}
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}
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@ -552,18 +548,17 @@ void vxlan_fdb_clear_offload(const struct net_device *dev, __be32 vni)
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struct vxlan_dev *vxlan;
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struct vxlan_rdst *rdst;
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struct vxlan_fdb *f;
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unsigned int h;
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if (!netif_is_vxlan(dev))
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return;
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vxlan = netdev_priv(dev);
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spin_lock_bh(&vxlan->hash_lock);
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for (h = 0; h < FDB_HASH_SIZE; ++h) {
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hlist_for_each_entry(f, &vxlan->fdb_head[h], hlist)
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if (f->vni == vni)
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list_for_each_entry(rdst, &f->remotes, list)
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rdst->offloaded = false;
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hlist_for_each_entry(f, &vxlan->fdb_list, fdb_node) {
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if (f->vni == vni) {
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list_for_each_entry(rdst, &f->remotes, list)
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rdst->offloaded = false;
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}
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}
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spin_unlock_bh(&vxlan->hash_lock);
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@ -1351,52 +1346,46 @@ static int vxlan_fdb_dump(struct sk_buff *skb, struct netlink_callback *cb,
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{
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struct ndo_fdb_dump_context *ctx = (void *)cb->ctx;
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struct vxlan_dev *vxlan = netdev_priv(dev);
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unsigned int h;
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struct vxlan_fdb *f;
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int err = 0;
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for (h = 0; h < FDB_HASH_SIZE; ++h) {
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struct vxlan_fdb *f;
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rcu_read_lock();
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hlist_for_each_entry_rcu(f, &vxlan->fdb_list, fdb_node) {
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struct vxlan_rdst *rd;
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rcu_read_lock();
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hlist_for_each_entry_rcu(f, &vxlan->fdb_head[h], hlist) {
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struct vxlan_rdst *rd;
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if (rcu_access_pointer(f->nh)) {
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if (*idx < ctx->fdb_idx)
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goto skip_nh;
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err = vxlan_fdb_info(skb, vxlan, f,
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NETLINK_CB(cb->skb).portid,
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cb->nlh->nlmsg_seq,
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RTM_NEWNEIGH,
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NLM_F_MULTI, NULL);
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if (err < 0) {
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rcu_read_unlock();
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goto out;
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}
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if (rcu_access_pointer(f->nh)) {
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if (*idx < ctx->fdb_idx)
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goto skip_nh;
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err = vxlan_fdb_info(skb, vxlan, f,
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NETLINK_CB(cb->skb).portid,
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cb->nlh->nlmsg_seq,
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RTM_NEWNEIGH, NLM_F_MULTI, NULL);
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if (err < 0) {
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rcu_read_unlock();
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goto out;
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}
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skip_nh:
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*idx += 1;
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continue;
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}
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list_for_each_entry_rcu(rd, &f->remotes, list) {
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if (*idx < ctx->fdb_idx)
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goto skip;
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err = vxlan_fdb_info(skb, vxlan, f,
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NETLINK_CB(cb->skb).portid,
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cb->nlh->nlmsg_seq,
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RTM_NEWNEIGH,
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NLM_F_MULTI, rd);
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if (err < 0) {
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rcu_read_unlock();
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goto out;
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}
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skip:
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*idx += 1;
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}
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*idx += 1;
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continue;
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}
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list_for_each_entry_rcu(rd, &f->remotes, list) {
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if (*idx < ctx->fdb_idx)
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goto skip;
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err = vxlan_fdb_info(skb, vxlan, f,
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NETLINK_CB(cb->skb).portid,
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cb->nlh->nlmsg_seq,
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RTM_NEWNEIGH, NLM_F_MULTI, rd);
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if (err < 0) {
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rcu_read_unlock();
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goto out;
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}
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skip:
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*idx += 1;
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}
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rcu_read_unlock();
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}
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rcu_read_unlock();
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out:
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return err;
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}
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@ -2830,35 +2819,30 @@ static void vxlan_cleanup(struct timer_list *t)
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{
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struct vxlan_dev *vxlan = from_timer(vxlan, t, age_timer);
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unsigned long next_timer = jiffies + FDB_AGE_INTERVAL;
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unsigned int h;
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struct hlist_node *n;
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struct vxlan_fdb *f;
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if (!netif_running(vxlan->dev))
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return;
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spin_lock(&vxlan->hash_lock);
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for (h = 0; h < FDB_HASH_SIZE; ++h) {
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struct hlist_node *p, *n;
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hlist_for_each_entry_safe(f, n, &vxlan->fdb_list, fdb_node) {
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unsigned long timeout;
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hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
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struct vxlan_fdb *f
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= container_of(p, struct vxlan_fdb, hlist);
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unsigned long timeout;
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if (f->state & (NUD_PERMANENT | NUD_NOARP))
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continue;
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if (f->state & (NUD_PERMANENT | NUD_NOARP))
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continue;
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if (f->flags & NTF_EXT_LEARNED)
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continue;
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if (f->flags & NTF_EXT_LEARNED)
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continue;
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timeout = READ_ONCE(f->updated) + vxlan->cfg.age_interval * HZ;
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if (time_before_eq(timeout, jiffies)) {
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netdev_dbg(vxlan->dev,
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"garbage collect %pM\n",
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f->eth_addr);
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f->state = NUD_STALE;
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vxlan_fdb_destroy(vxlan, f, true, true);
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} else if (time_before(timeout, next_timer))
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next_timer = timeout;
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timeout = READ_ONCE(f->updated) + vxlan->cfg.age_interval * HZ;
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if (time_before_eq(timeout, jiffies)) {
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netdev_dbg(vxlan->dev, "garbage collect %pM\n",
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f->eth_addr);
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f->state = NUD_STALE;
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vxlan_fdb_destroy(vxlan, f, true, true);
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} else if (time_before(timeout, next_timer)) {
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next_timer = timeout;
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}
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}
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spin_unlock(&vxlan->hash_lock);
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@ -3050,31 +3034,25 @@ static void vxlan_flush(struct vxlan_dev *vxlan,
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const struct vxlan_fdb_flush_desc *desc)
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{
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bool match_remotes = vxlan_fdb_flush_should_match_remotes(desc);
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unsigned int h;
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struct hlist_node *n;
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struct vxlan_fdb *f;
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spin_lock_bh(&vxlan->hash_lock);
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for (h = 0; h < FDB_HASH_SIZE; ++h) {
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struct hlist_node *p, *n;
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hlist_for_each_entry_safe(f, n, &vxlan->fdb_list, fdb_node) {
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if (!vxlan_fdb_flush_matches(f, vxlan, desc))
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continue;
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hlist_for_each_safe(p, n, &vxlan->fdb_head[h]) {
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struct vxlan_fdb *f
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= container_of(p, struct vxlan_fdb, hlist);
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if (match_remotes) {
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bool destroy_fdb = false;
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if (!vxlan_fdb_flush_matches(f, vxlan, desc))
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vxlan_fdb_flush_match_remotes(f, vxlan, desc,
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&destroy_fdb);
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if (!destroy_fdb)
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continue;
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if (match_remotes) {
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bool destroy_fdb = false;
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vxlan_fdb_flush_match_remotes(f, vxlan, desc,
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&destroy_fdb);
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if (!destroy_fdb)
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continue;
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}
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vxlan_fdb_destroy(vxlan, f, true, true);
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}
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vxlan_fdb_destroy(vxlan, f, true, true);
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}
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spin_unlock_bh(&vxlan->hash_lock);
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}
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@ -4860,7 +4838,7 @@ static void vxlan_fdb_nh_flush(struct nexthop *nh)
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vxlan = rcu_dereference(fdb->vdev);
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WARN_ON(!vxlan);
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spin_lock_bh(&vxlan->hash_lock);
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if (!hlist_unhashed(&fdb->hlist))
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if (!hlist_unhashed(&fdb->fdb_node))
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vxlan_fdb_destroy(vxlan, fdb, false, false);
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spin_unlock_bh(&vxlan->hash_lock);
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}
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