--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/if_bridge.h>
+#include <linux/in.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/netlink.h>
+#include <linux/rhashtable.h>
+#include <linux/rhashtable-types.h>
+#include <linux/rtnetlink.h>
+#include <linux/skbuff.h>
+#include <linux/types.h>
+#include <net/netlink.h>
+#include <net/vxlan.h>
+
+#include "vxlan_private.h"
+
+struct vxlan_mdb_entry_key {
+ union vxlan_addr src;
+ union vxlan_addr dst;
+ __be32 vni;
+};
+
+struct vxlan_mdb_entry {
+ struct rhash_head rhnode;
+ struct list_head remotes;
+ struct vxlan_mdb_entry_key key;
+ struct hlist_node mdb_node;
+ struct rcu_head rcu;
+};
+
+#define VXLAN_MDB_REMOTE_F_BLOCKED BIT(0)
+
+struct vxlan_mdb_remote {
+ struct list_head list;
+ struct vxlan_rdst __rcu *rd;
+ u8 flags;
+ u8 filter_mode;
+ u8 rt_protocol;
+ struct hlist_head src_list;
+ struct rcu_head rcu;
+};
+
+#define VXLAN_SGRP_F_DELETE BIT(0)
+
+struct vxlan_mdb_src_entry {
+ struct hlist_node node;
+ union vxlan_addr addr;
+ u8 flags;
+};
+
+struct vxlan_mdb_dump_ctx {
+ long reserved;
+ long entry_idx;
+ long remote_idx;
+};
+
+struct vxlan_mdb_config_src_entry {
+ union vxlan_addr addr;
+ struct list_head node;
+};
+
+struct vxlan_mdb_config {
+ struct vxlan_dev *vxlan;
+ struct vxlan_mdb_entry_key group;
+ struct list_head src_list;
+ union vxlan_addr remote_ip;
+ u32 remote_ifindex;
+ __be32 remote_vni;
+ __be16 remote_port;
+ u16 nlflags;
+ u8 flags;
+ u8 filter_mode;
+ u8 rt_protocol;
+};
+
+static const struct rhashtable_params vxlan_mdb_rht_params = {
+ .head_offset = offsetof(struct vxlan_mdb_entry, rhnode),
+ .key_offset = offsetof(struct vxlan_mdb_entry, key),
+ .key_len = sizeof(struct vxlan_mdb_entry_key),
+ .automatic_shrinking = true,
+};
+
+static int __vxlan_mdb_add(const struct vxlan_mdb_config *cfg,
+ struct netlink_ext_ack *extack);
+static int __vxlan_mdb_del(const struct vxlan_mdb_config *cfg,
+ struct netlink_ext_ack *extack);
+
+static void vxlan_br_mdb_entry_fill(const struct vxlan_dev *vxlan,
+ const struct vxlan_mdb_entry *mdb_entry,
+ const struct vxlan_mdb_remote *remote,
+ struct br_mdb_entry *e)
+{
+ const union vxlan_addr *dst = &mdb_entry->key.dst;
+
+ memset(e, 0, sizeof(*e));
+ e->ifindex = vxlan->dev->ifindex;
+ e->state = MDB_PERMANENT;
+
+ if (remote->flags & VXLAN_MDB_REMOTE_F_BLOCKED)
+ e->flags |= MDB_FLAGS_BLOCKED;
+
+ switch (dst->sa.sa_family) {
+ case AF_INET:
+ e->addr.u.ip4 = dst->sin.sin_addr.s_addr;
+ e->addr.proto = htons(ETH_P_IP);
+ break;
+#if IS_ENABLED(CONFIG_IPV6)
+ case AF_INET6:
+ e->addr.u.ip6 = dst->sin6.sin6_addr;
+ e->addr.proto = htons(ETH_P_IPV6);
+ break;
+#endif
+ }
+}
+
+static int vxlan_mdb_entry_info_fill_srcs(struct sk_buff *skb,
+ const struct vxlan_mdb_remote *remote)
+{
+ struct vxlan_mdb_src_entry *ent;
+ struct nlattr *nest;
+
+ if (hlist_empty(&remote->src_list))
+ return 0;
+
+ nest = nla_nest_start(skb, MDBA_MDB_EATTR_SRC_LIST);
+ if (!nest)
+ return -EMSGSIZE;
+
+ hlist_for_each_entry(ent, &remote->src_list, node) {
+ struct nlattr *nest_ent;
+
+ nest_ent = nla_nest_start(skb, MDBA_MDB_SRCLIST_ENTRY);
+ if (!nest_ent)
+ goto out_cancel_err;
+
+ if (vxlan_nla_put_addr(skb, MDBA_MDB_SRCATTR_ADDRESS,
+ &ent->addr) ||
+ nla_put_u32(skb, MDBA_MDB_SRCATTR_TIMER, 0))
+ goto out_cancel_err;
+
+ nla_nest_end(skb, nest_ent);
+ }
+
+ nla_nest_end(skb, nest);
+
+ return 0;
+
+out_cancel_err:
+ nla_nest_cancel(skb, nest);
+ return -EMSGSIZE;
+}
+
+static int vxlan_mdb_entry_info_fill(const struct vxlan_dev *vxlan,
+ struct sk_buff *skb,
+ const struct vxlan_mdb_entry *mdb_entry,
+ const struct vxlan_mdb_remote *remote)
+{
+ struct vxlan_rdst *rd = rtnl_dereference(remote->rd);
+ struct br_mdb_entry e;
+ struct nlattr *nest;
+
+ nest = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY_INFO);
+ if (!nest)
+ return -EMSGSIZE;
+
+ vxlan_br_mdb_entry_fill(vxlan, mdb_entry, remote, &e);
+
+ if (nla_put_nohdr(skb, sizeof(e), &e) ||
+ nla_put_u32(skb, MDBA_MDB_EATTR_TIMER, 0))
+ goto nest_err;
+
+ if (!vxlan_addr_any(&mdb_entry->key.src) &&
+ vxlan_nla_put_addr(skb, MDBA_MDB_EATTR_SOURCE, &mdb_entry->key.src))
+ goto nest_err;
+
+ if (nla_put_u8(skb, MDBA_MDB_EATTR_RTPROT, remote->rt_protocol) ||
+ nla_put_u8(skb, MDBA_MDB_EATTR_GROUP_MODE, remote->filter_mode) ||
+ vxlan_mdb_entry_info_fill_srcs(skb, remote) ||
+ vxlan_nla_put_addr(skb, MDBA_MDB_EATTR_DST, &rd->remote_ip))
+ goto nest_err;
+
+ if (rd->remote_port && rd->remote_port != vxlan->cfg.dst_port &&
+ nla_put_u16(skb, MDBA_MDB_EATTR_DST_PORT,
+ be16_to_cpu(rd->remote_port)))
+ goto nest_err;
+
+ if (rd->remote_vni != vxlan->default_dst.remote_vni &&
+ nla_put_u32(skb, MDBA_MDB_EATTR_VNI, be32_to_cpu(rd->remote_vni)))
+ goto nest_err;
+
+ if (rd->remote_ifindex &&
+ nla_put_u32(skb, MDBA_MDB_EATTR_IFINDEX, rd->remote_ifindex))
+ goto nest_err;
+
+ if ((vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) &&
+ mdb_entry->key.vni && nla_put_u32(skb, MDBA_MDB_EATTR_SRC_VNI,
+ be32_to_cpu(mdb_entry->key.vni)))
+ goto nest_err;
+
+ nla_nest_end(skb, nest);
+
+ return 0;
+
+nest_err:
+ nla_nest_cancel(skb, nest);
+ return -EMSGSIZE;
+}
+
+static int vxlan_mdb_entry_fill(const struct vxlan_dev *vxlan,
+ struct sk_buff *skb,
+ struct vxlan_mdb_dump_ctx *ctx,
+ const struct vxlan_mdb_entry *mdb_entry)
+{
+ int remote_idx = 0, s_remote_idx = ctx->remote_idx;
+ struct vxlan_mdb_remote *remote;
+ struct nlattr *nest;
+ int err = 0;
+
+ nest = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY);
+ if (!nest)
+ return -EMSGSIZE;
+
+ list_for_each_entry(remote, &mdb_entry->remotes, list) {
+ if (remote_idx < s_remote_idx)
+ goto skip;
+
+ err = vxlan_mdb_entry_info_fill(vxlan, skb, mdb_entry, remote);
+ if (err)
+ break;
+skip:
+ remote_idx++;
+ }
+
+ ctx->remote_idx = err ? remote_idx : 0;
+ nla_nest_end(skb, nest);
+ return err;
+}
+
+static int vxlan_mdb_fill(const struct vxlan_dev *vxlan, struct sk_buff *skb,
+ struct vxlan_mdb_dump_ctx *ctx)
+{
+ int entry_idx = 0, s_entry_idx = ctx->entry_idx;
+ struct vxlan_mdb_entry *mdb_entry;
+ struct nlattr *nest;
+ int err = 0;
+
+ nest = nla_nest_start_noflag(skb, MDBA_MDB);
+ if (!nest)
+ return -EMSGSIZE;
+
+ hlist_for_each_entry(mdb_entry, &vxlan->mdb_list, mdb_node) {
+ if (entry_idx < s_entry_idx)
+ goto skip;
+
+ err = vxlan_mdb_entry_fill(vxlan, skb, ctx, mdb_entry);
+ if (err)
+ break;
+skip:
+ entry_idx++;
+ }
+
+ ctx->entry_idx = err ? entry_idx : 0;
+ nla_nest_end(skb, nest);
+ return err;
+}
+
+int vxlan_mdb_dump(struct net_device *dev, struct sk_buff *skb,
+ struct netlink_callback *cb)
+{
+ struct vxlan_mdb_dump_ctx *ctx = (void *)cb->ctx;
+ struct vxlan_dev *vxlan = netdev_priv(dev);
+ struct br_port_msg *bpm;
+ struct nlmsghdr *nlh;
+ int err;
+
+ ASSERT_RTNL();
+
+ NL_ASSERT_DUMP_CTX_FITS(struct vxlan_mdb_dump_ctx);
+
+ nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
+ cb->nlh->nlmsg_seq, RTM_NEWMDB, sizeof(*bpm),
+ NLM_F_MULTI);
+ if (!nlh)
+ return -EMSGSIZE;
+
+ bpm = nlmsg_data(nlh);
+ memset(bpm, 0, sizeof(*bpm));
+ bpm->family = AF_BRIDGE;
+ bpm->ifindex = dev->ifindex;
+
+ err = vxlan_mdb_fill(vxlan, skb, ctx);
+
+ nlmsg_end(skb, nlh);
+
+ cb->seq = vxlan->mdb_seq;
+ nl_dump_check_consistent(cb, nlh);
+
+ return err;
+}
+
+static const struct nla_policy
+vxlan_mdbe_src_list_entry_pol[MDBE_SRCATTR_MAX + 1] = {
+ [MDBE_SRCATTR_ADDRESS] = NLA_POLICY_RANGE(NLA_BINARY,
+ sizeof(struct in_addr),
+ sizeof(struct in6_addr)),
+};
+
+static const struct nla_policy
+vxlan_mdbe_src_list_pol[MDBE_SRC_LIST_MAX + 1] = {
+ [MDBE_SRC_LIST_ENTRY] = NLA_POLICY_NESTED(vxlan_mdbe_src_list_entry_pol),
+};
+
+static struct netlink_range_validation vni_range = {
+ .max = VXLAN_N_VID - 1,
+};
+
+static const struct nla_policy vxlan_mdbe_attrs_pol[MDBE_ATTR_MAX + 1] = {
+ [MDBE_ATTR_SOURCE] = NLA_POLICY_RANGE(NLA_BINARY,
+ sizeof(struct in_addr),
+ sizeof(struct in6_addr)),
+ [MDBE_ATTR_GROUP_MODE] = NLA_POLICY_RANGE(NLA_U8, MCAST_EXCLUDE,
+ MCAST_INCLUDE),
+ [MDBE_ATTR_SRC_LIST] = NLA_POLICY_NESTED(vxlan_mdbe_src_list_pol),
+ [MDBE_ATTR_RTPROT] = NLA_POLICY_MIN(NLA_U8, RTPROT_STATIC),
+ [MDBE_ATTR_DST] = NLA_POLICY_RANGE(NLA_BINARY,
+ sizeof(struct in_addr),
+ sizeof(struct in6_addr)),
+ [MDBE_ATTR_DST_PORT] = { .type = NLA_U16 },
+ [MDBE_ATTR_VNI] = NLA_POLICY_FULL_RANGE(NLA_U32, &vni_range),
+ [MDBE_ATTR_IFINDEX] = NLA_POLICY_MIN(NLA_S32, 1),
+ [MDBE_ATTR_SRC_VNI] = NLA_POLICY_FULL_RANGE(NLA_U32, &vni_range),
+};
+
+static bool vxlan_mdb_is_valid_source(const struct nlattr *attr, __be16 proto,
+ struct netlink_ext_ack *extack)
+{
+ switch (proto) {
+ case htons(ETH_P_IP):
+ if (nla_len(attr) != sizeof(struct in_addr)) {
+ NL_SET_ERR_MSG_MOD(extack, "IPv4 invalid source address length");
+ return false;
+ }
+ if (ipv4_is_multicast(nla_get_in_addr(attr))) {
+ NL_SET_ERR_MSG_MOD(extack, "IPv4 multicast source address is not allowed");
+ return false;
+ }
+ break;
+#if IS_ENABLED(CONFIG_IPV6)
+ case htons(ETH_P_IPV6): {
+ struct in6_addr src;
+
+ if (nla_len(attr) != sizeof(struct in6_addr)) {
+ NL_SET_ERR_MSG_MOD(extack, "IPv6 invalid source address length");
+ return false;
+ }
+ src = nla_get_in6_addr(attr);
+ if (ipv6_addr_is_multicast(&src)) {
+ NL_SET_ERR_MSG_MOD(extack, "IPv6 multicast source address is not allowed");
+ return false;
+ }
+ break;
+ }
+#endif
+ default:
+ NL_SET_ERR_MSG_MOD(extack, "Invalid protocol used with source address");
+ return false;
+ }
+
+ return true;
+}
+
+static void vxlan_mdb_config_group_set(struct vxlan_mdb_config *cfg,
+ const struct br_mdb_entry *entry,
+ const struct nlattr *source_attr)
+{
+ struct vxlan_mdb_entry_key *group = &cfg->group;
+
+ switch (entry->addr.proto) {
+ case htons(ETH_P_IP):
+ group->dst.sa.sa_family = AF_INET;
+ group->dst.sin.sin_addr.s_addr = entry->addr.u.ip4;
+ break;
+#if IS_ENABLED(CONFIG_IPV6)
+ case htons(ETH_P_IPV6):
+ group->dst.sa.sa_family = AF_INET6;
+ group->dst.sin6.sin6_addr = entry->addr.u.ip6;
+ break;
+#endif
+ }
+
+ if (source_attr)
+ vxlan_nla_get_addr(&group->src, source_attr);
+}
+
+static bool vxlan_mdb_is_star_g(const struct vxlan_mdb_entry_key *group)
+{
+ return !vxlan_addr_any(&group->dst) && vxlan_addr_any(&group->src);
+}
+
+static bool vxlan_mdb_is_sg(const struct vxlan_mdb_entry_key *group)
+{
+ return !vxlan_addr_any(&group->dst) && !vxlan_addr_any(&group->src);
+}
+
+static int vxlan_mdb_config_src_entry_init(struct vxlan_mdb_config *cfg,
+ __be16 proto,
+ const struct nlattr *src_entry,
+ struct netlink_ext_ack *extack)
+{
+ struct nlattr *tb[MDBE_SRCATTR_MAX + 1];
+ struct vxlan_mdb_config_src_entry *src;
+ int err;
+
+ err = nla_parse_nested(tb, MDBE_SRCATTR_MAX, src_entry,
+ vxlan_mdbe_src_list_entry_pol, extack);
+ if (err)
+ return err;
+
+ if (NL_REQ_ATTR_CHECK(extack, src_entry, tb, MDBE_SRCATTR_ADDRESS))
+ return -EINVAL;
+
+ if (!vxlan_mdb_is_valid_source(tb[MDBE_SRCATTR_ADDRESS], proto,
+ extack))
+ return -EINVAL;
+
+ src = kzalloc(sizeof(*src), GFP_KERNEL);
+ if (!src)
+ return -ENOMEM;
+
+ err = vxlan_nla_get_addr(&src->addr, tb[MDBE_SRCATTR_ADDRESS]);
+ if (err)
+ goto err_free_src;
+
+ list_add_tail(&src->node, &cfg->src_list);
+
+ return 0;
+
+err_free_src:
+ kfree(src);
+ return err;
+}
+
+static void
+vxlan_mdb_config_src_entry_fini(struct vxlan_mdb_config_src_entry *src)
+{
+ list_del(&src->node);
+ kfree(src);
+}
+
+static int vxlan_mdb_config_src_list_init(struct vxlan_mdb_config *cfg,
+ __be16 proto,
+ const struct nlattr *src_list,
+ struct netlink_ext_ack *extack)
+{
+ struct vxlan_mdb_config_src_entry *src, *tmp;
+ struct nlattr *src_entry;
+ int rem, err;
+
+ nla_for_each_nested(src_entry, src_list, rem) {
+ err = vxlan_mdb_config_src_entry_init(cfg, proto, src_entry,
+ extack);
+ if (err)
+ goto err_src_entry_init;
+ }
+
+ return 0;
+
+err_src_entry_init:
+ list_for_each_entry_safe_reverse(src, tmp, &cfg->src_list, node)
+ vxlan_mdb_config_src_entry_fini(src);
+ return err;
+}
+
+static void vxlan_mdb_config_src_list_fini(struct vxlan_mdb_config *cfg)
+{
+ struct vxlan_mdb_config_src_entry *src, *tmp;
+
+ list_for_each_entry_safe_reverse(src, tmp, &cfg->src_list, node)
+ vxlan_mdb_config_src_entry_fini(src);
+}
+
+static int vxlan_mdb_config_attrs_init(struct vxlan_mdb_config *cfg,
+ const struct br_mdb_entry *entry,
+ const struct nlattr *set_attrs,
+ struct netlink_ext_ack *extack)
+{
+ struct nlattr *mdbe_attrs[MDBE_ATTR_MAX + 1];
+ int err;
+
+ err = nla_parse_nested(mdbe_attrs, MDBE_ATTR_MAX, set_attrs,
+ vxlan_mdbe_attrs_pol, extack);
+ if (err)
+ return err;
+
+ if (NL_REQ_ATTR_CHECK(extack, set_attrs, mdbe_attrs, MDBE_ATTR_DST)) {
+ NL_SET_ERR_MSG_MOD(extack, "Missing remote destination IP address");
+ return -EINVAL;
+ }
+
+ if (mdbe_attrs[MDBE_ATTR_SOURCE] &&
+ !vxlan_mdb_is_valid_source(mdbe_attrs[MDBE_ATTR_SOURCE],
+ entry->addr.proto, extack))
+ return -EINVAL;
+
+ vxlan_mdb_config_group_set(cfg, entry, mdbe_attrs[MDBE_ATTR_SOURCE]);
+
+ /* rtnetlink code only validates that IPv4 group address is
+ * multicast.
+ */
+ if (!vxlan_addr_is_multicast(&cfg->group.dst) &&
+ !vxlan_addr_any(&cfg->group.dst)) {
+ NL_SET_ERR_MSG_MOD(extack, "Group address is not multicast");
+ return -EINVAL;
+ }
+
+ if (vxlan_addr_any(&cfg->group.dst) &&
+ mdbe_attrs[MDBE_ATTR_SOURCE]) {
+ NL_SET_ERR_MSG_MOD(extack, "Source cannot be specified for the all-zeros entry");
+ return -EINVAL;
+ }
+
+ if (vxlan_mdb_is_sg(&cfg->group))
+ cfg->filter_mode = MCAST_INCLUDE;
+
+ if (mdbe_attrs[MDBE_ATTR_GROUP_MODE]) {
+ if (!vxlan_mdb_is_star_g(&cfg->group)) {
+ NL_SET_ERR_MSG_MOD(extack, "Filter mode can only be set for (*, G) entries");
+ return -EINVAL;
+ }
+ cfg->filter_mode = nla_get_u8(mdbe_attrs[MDBE_ATTR_GROUP_MODE]);
+ }
+
+ if (mdbe_attrs[MDBE_ATTR_SRC_LIST]) {
+ if (!vxlan_mdb_is_star_g(&cfg->group)) {
+ NL_SET_ERR_MSG_MOD(extack, "Source list can only be set for (*, G) entries");
+ return -EINVAL;
+ }
+ if (!mdbe_attrs[MDBE_ATTR_GROUP_MODE]) {
+ NL_SET_ERR_MSG_MOD(extack, "Source list cannot be set without filter mode");
+ return -EINVAL;
+ }
+ err = vxlan_mdb_config_src_list_init(cfg, entry->addr.proto,
+ mdbe_attrs[MDBE_ATTR_SRC_LIST],
+ extack);
+ if (err)
+ return err;
+ }
+
+ if (vxlan_mdb_is_star_g(&cfg->group) && list_empty(&cfg->src_list) &&
+ cfg->filter_mode == MCAST_INCLUDE) {
+ NL_SET_ERR_MSG_MOD(extack, "Cannot add (*, G) INCLUDE with an empty source list");
+ return -EINVAL;
+ }
+
+ if (mdbe_attrs[MDBE_ATTR_RTPROT])
+ cfg->rt_protocol = nla_get_u8(mdbe_attrs[MDBE_ATTR_RTPROT]);
+
+ err = vxlan_nla_get_addr(&cfg->remote_ip, mdbe_attrs[MDBE_ATTR_DST]);
+ if (err) {
+ NL_SET_ERR_MSG_MOD(extack, "Invalid remote destination address");
+ goto err_src_list_fini;
+ }
+
+ if (mdbe_attrs[MDBE_ATTR_DST_PORT])
+ cfg->remote_port =
+ cpu_to_be16(nla_get_u16(mdbe_attrs[MDBE_ATTR_DST_PORT]));
+
+ if (mdbe_attrs[MDBE_ATTR_VNI])
+ cfg->remote_vni =
+ cpu_to_be32(nla_get_u32(mdbe_attrs[MDBE_ATTR_VNI]));
+
+ if (mdbe_attrs[MDBE_ATTR_IFINDEX]) {
+ cfg->remote_ifindex =
+ nla_get_s32(mdbe_attrs[MDBE_ATTR_IFINDEX]);
+ if (!__dev_get_by_index(cfg->vxlan->net, cfg->remote_ifindex)) {
+ NL_SET_ERR_MSG_MOD(extack, "Outgoing interface not found");
+ err = -EINVAL;
+ goto err_src_list_fini;
+ }
+ }
+
+ if (mdbe_attrs[MDBE_ATTR_SRC_VNI])
+ cfg->group.vni =
+ cpu_to_be32(nla_get_u32(mdbe_attrs[MDBE_ATTR_SRC_VNI]));
+
+ return 0;
+
+err_src_list_fini:
+ vxlan_mdb_config_src_list_fini(cfg);
+ return err;
+}
+
+static int vxlan_mdb_config_init(struct vxlan_mdb_config *cfg,
+ struct net_device *dev, struct nlattr *tb[],
+ u16 nlmsg_flags,
+ struct netlink_ext_ack *extack)
+{
+ struct br_mdb_entry *entry = nla_data(tb[MDBA_SET_ENTRY]);
+ struct vxlan_dev *vxlan = netdev_priv(dev);
+
+ memset(cfg, 0, sizeof(*cfg));
+ cfg->vxlan = vxlan;
+ cfg->group.vni = vxlan->default_dst.remote_vni;
+ INIT_LIST_HEAD(&cfg->src_list);
+ cfg->nlflags = nlmsg_flags;
+ cfg->filter_mode = MCAST_EXCLUDE;
+ cfg->rt_protocol = RTPROT_STATIC;
+ cfg->remote_vni = vxlan->default_dst.remote_vni;
+ cfg->remote_port = vxlan->cfg.dst_port;
+
+ if (entry->ifindex != dev->ifindex) {
+ NL_SET_ERR_MSG_MOD(extack, "Port net device must be the VXLAN net device");
+ return -EINVAL;
+ }
+
+ /* State is not part of the entry key and can be ignored on deletion
+ * requests.
+ */
+ if ((nlmsg_flags & (NLM_F_CREATE | NLM_F_REPLACE)) &&
+ entry->state != MDB_PERMANENT) {
+ NL_SET_ERR_MSG_MOD(extack, "MDB entry must be permanent");
+ return -EINVAL;
+ }
+
+ if (entry->flags) {
+ NL_SET_ERR_MSG_MOD(extack, "Invalid MDB entry flags");
+ return -EINVAL;
+ }
+
+ if (entry->vid) {
+ NL_SET_ERR_MSG_MOD(extack, "VID must not be specified");
+ return -EINVAL;
+ }
+
+ if (entry->addr.proto != htons(ETH_P_IP) &&
+ entry->addr.proto != htons(ETH_P_IPV6)) {
+ NL_SET_ERR_MSG_MOD(extack, "Group address must be an IPv4 / IPv6 address");
+ return -EINVAL;
+ }
+
+ if (NL_REQ_ATTR_CHECK(extack, NULL, tb, MDBA_SET_ENTRY_ATTRS)) {
+ NL_SET_ERR_MSG_MOD(extack, "Missing MDBA_SET_ENTRY_ATTRS attribute");
+ return -EINVAL;
+ }
+
+ return vxlan_mdb_config_attrs_init(cfg, entry, tb[MDBA_SET_ENTRY_ATTRS],
+ extack);
+}
+
+static void vxlan_mdb_config_fini(struct vxlan_mdb_config *cfg)
+{
+ vxlan_mdb_config_src_list_fini(cfg);
+}
+
+static struct vxlan_mdb_entry *
+vxlan_mdb_entry_lookup(struct vxlan_dev *vxlan,
+ const struct vxlan_mdb_entry_key *group)
+{
+ return rhashtable_lookup_fast(&vxlan->mdb_tbl, group,
+ vxlan_mdb_rht_params);
+}
+
+static struct vxlan_mdb_remote *
+vxlan_mdb_remote_lookup(const struct vxlan_mdb_entry *mdb_entry,
+ const union vxlan_addr *addr)
+{
+ struct vxlan_mdb_remote *remote;
+
+ list_for_each_entry(remote, &mdb_entry->remotes, list) {
+ struct vxlan_rdst *rd = rtnl_dereference(remote->rd);
+
+ if (vxlan_addr_equal(addr, &rd->remote_ip))
+ return remote;
+ }
+
+ return NULL;
+}
+
+static void vxlan_mdb_rdst_free(struct rcu_head *head)
+{
+ struct vxlan_rdst *rd = container_of(head, struct vxlan_rdst, rcu);
+
+ dst_cache_destroy(&rd->dst_cache);
+ kfree(rd);
+}
+
+static int vxlan_mdb_remote_rdst_init(const struct vxlan_mdb_config *cfg,
+ struct vxlan_mdb_remote *remote)
+{
+ struct vxlan_rdst *rd;
+ int err;
+
+ rd = kzalloc(sizeof(*rd), GFP_KERNEL);
+ if (!rd)
+ return -ENOMEM;
+
+ err = dst_cache_init(&rd->dst_cache, GFP_KERNEL);
+ if (err)
+ goto err_free_rdst;
+
+ rd->remote_ip = cfg->remote_ip;
+ rd->remote_port = cfg->remote_port;
+ rd->remote_vni = cfg->remote_vni;
+ rd->remote_ifindex = cfg->remote_ifindex;
+ rcu_assign_pointer(remote->rd, rd);
+
+ return 0;
+
+err_free_rdst:
+ kfree(rd);
+ return err;
+}
+
+static void vxlan_mdb_remote_rdst_fini(struct vxlan_rdst *rd)
+{
+ call_rcu(&rd->rcu, vxlan_mdb_rdst_free);
+}
+
+static int vxlan_mdb_remote_init(const struct vxlan_mdb_config *cfg,
+ struct vxlan_mdb_remote *remote)
+{
+ int err;
+
+ err = vxlan_mdb_remote_rdst_init(cfg, remote);
+ if (err)
+ return err;
+
+ remote->flags = cfg->flags;
+ remote->filter_mode = cfg->filter_mode;
+ remote->rt_protocol = cfg->rt_protocol;
+ INIT_HLIST_HEAD(&remote->src_list);
+
+ return 0;
+}
+
+static void vxlan_mdb_remote_fini(struct vxlan_dev *vxlan,
+ struct vxlan_mdb_remote *remote)
+{
+ WARN_ON_ONCE(!hlist_empty(&remote->src_list));
+ vxlan_mdb_remote_rdst_fini(rtnl_dereference(remote->rd));
+}
+
+static struct vxlan_mdb_src_entry *
+vxlan_mdb_remote_src_entry_lookup(const struct vxlan_mdb_remote *remote,
+ const union vxlan_addr *addr)
+{
+ struct vxlan_mdb_src_entry *ent;
+
+ hlist_for_each_entry(ent, &remote->src_list, node) {
+ if (vxlan_addr_equal(&ent->addr, addr))
+ return ent;
+ }
+
+ return NULL;
+}
+
+static struct vxlan_mdb_src_entry *
+vxlan_mdb_remote_src_entry_add(struct vxlan_mdb_remote *remote,
+ const union vxlan_addr *addr)
+{
+ struct vxlan_mdb_src_entry *ent;
+
+ ent = kzalloc(sizeof(*ent), GFP_KERNEL);
+ if (!ent)
+ return NULL;
+
+ ent->addr = *addr;
+ hlist_add_head(&ent->node, &remote->src_list);
+
+ return ent;
+}
+
+static void
+vxlan_mdb_remote_src_entry_del(struct vxlan_mdb_src_entry *ent)
+{
+ hlist_del(&ent->node);
+ kfree(ent);
+}
+
+static int
+vxlan_mdb_remote_src_fwd_add(const struct vxlan_mdb_config *cfg,
+ const union vxlan_addr *addr,
+ struct netlink_ext_ack *extack)
+{
+ struct vxlan_mdb_config sg_cfg;
+
+ memset(&sg_cfg, 0, sizeof(sg_cfg));
+ sg_cfg.vxlan = cfg->vxlan;
+ sg_cfg.group.src = *addr;
+ sg_cfg.group.dst = cfg->group.dst;
+ sg_cfg.group.vni = cfg->group.vni;
+ INIT_LIST_HEAD(&sg_cfg.src_list);
+ sg_cfg.remote_ip = cfg->remote_ip;
+ sg_cfg.remote_ifindex = cfg->remote_ifindex;
+ sg_cfg.remote_vni = cfg->remote_vni;
+ sg_cfg.remote_port = cfg->remote_port;
+ sg_cfg.nlflags = cfg->nlflags;
+ sg_cfg.filter_mode = MCAST_INCLUDE;
+ if (cfg->filter_mode == MCAST_EXCLUDE)
+ sg_cfg.flags = VXLAN_MDB_REMOTE_F_BLOCKED;
+ sg_cfg.rt_protocol = cfg->rt_protocol;
+
+ return __vxlan_mdb_add(&sg_cfg, extack);
+}
+
+static void
+vxlan_mdb_remote_src_fwd_del(struct vxlan_dev *vxlan,
+ const struct vxlan_mdb_entry_key *group,
+ const struct vxlan_mdb_remote *remote,
+ const union vxlan_addr *addr)
+{
+ struct vxlan_rdst *rd = rtnl_dereference(remote->rd);
+ struct vxlan_mdb_config sg_cfg;
+
+ memset(&sg_cfg, 0, sizeof(sg_cfg));
+ sg_cfg.vxlan = vxlan;
+ sg_cfg.group.src = *addr;
+ sg_cfg.group.dst = group->dst;
+ sg_cfg.group.vni = group->vni;
+ INIT_LIST_HEAD(&sg_cfg.src_list);
+ sg_cfg.remote_ip = rd->remote_ip;
+
+ __vxlan_mdb_del(&sg_cfg, NULL);
+}
+
+static int
+vxlan_mdb_remote_src_add(const struct vxlan_mdb_config *cfg,
+ struct vxlan_mdb_remote *remote,
+ const struct vxlan_mdb_config_src_entry *src,
+ struct netlink_ext_ack *extack)
+{
+ struct vxlan_mdb_src_entry *ent;
+ int err;
+
+ ent = vxlan_mdb_remote_src_entry_lookup(remote, &src->addr);
+ if (!ent) {
+ ent = vxlan_mdb_remote_src_entry_add(remote, &src->addr);
+ if (!ent)
+ return -ENOMEM;
+ } else if (!(cfg->nlflags & NLM_F_REPLACE)) {
+ NL_SET_ERR_MSG_MOD(extack, "Source entry already exists");
+ return -EEXIST;
+ }
+
+ err = vxlan_mdb_remote_src_fwd_add(cfg, &ent->addr, extack);
+ if (err)
+ goto err_src_del;
+
+ /* Clear flags in case source entry was marked for deletion as part of
+ * replace flow.
+ */
+ ent->flags = 0;
+
+ return 0;
+
+err_src_del:
+ vxlan_mdb_remote_src_entry_del(ent);
+ return err;
+}
+
+static void vxlan_mdb_remote_src_del(struct vxlan_dev *vxlan,
+ const struct vxlan_mdb_entry_key *group,
+ const struct vxlan_mdb_remote *remote,
+ struct vxlan_mdb_src_entry *ent)
+{
+ vxlan_mdb_remote_src_fwd_del(vxlan, group, remote, &ent->addr);
+ vxlan_mdb_remote_src_entry_del(ent);
+}
+
+static int vxlan_mdb_remote_srcs_add(const struct vxlan_mdb_config *cfg,
+ struct vxlan_mdb_remote *remote,
+ struct netlink_ext_ack *extack)
+{
+ struct vxlan_mdb_config_src_entry *src;
+ struct vxlan_mdb_src_entry *ent;
+ struct hlist_node *tmp;
+ int err;
+
+ list_for_each_entry(src, &cfg->src_list, node) {
+ err = vxlan_mdb_remote_src_add(cfg, remote, src, extack);
+ if (err)
+ goto err_src_del;
+ }
+
+ return 0;
+
+err_src_del:
+ hlist_for_each_entry_safe(ent, tmp, &remote->src_list, node)
+ vxlan_mdb_remote_src_del(cfg->vxlan, &cfg->group, remote, ent);
+ return err;
+}
+
+static void vxlan_mdb_remote_srcs_del(struct vxlan_dev *vxlan,
+ const struct vxlan_mdb_entry_key *group,
+ struct vxlan_mdb_remote *remote)
+{
+ struct vxlan_mdb_src_entry *ent;
+ struct hlist_node *tmp;
+
+ hlist_for_each_entry_safe(ent, tmp, &remote->src_list, node)
+ vxlan_mdb_remote_src_del(vxlan, group, remote, ent);
+}
+
+static size_t
+vxlan_mdb_nlmsg_src_list_size(const struct vxlan_mdb_entry_key *group,
+ const struct vxlan_mdb_remote *remote)
+{
+ struct vxlan_mdb_src_entry *ent;
+ size_t nlmsg_size;
+
+ if (hlist_empty(&remote->src_list))
+ return 0;
+
+ /* MDBA_MDB_EATTR_SRC_LIST */
+ nlmsg_size = nla_total_size(0);
+
+ hlist_for_each_entry(ent, &remote->src_list, node) {
+ /* MDBA_MDB_SRCLIST_ENTRY */
+ nlmsg_size += nla_total_size(0) +
+ /* MDBA_MDB_SRCATTR_ADDRESS */
+ nla_total_size(vxlan_addr_size(&group->dst)) +
+ /* MDBA_MDB_SRCATTR_TIMER */
+ nla_total_size(sizeof(u8));
+ }
+
+ return nlmsg_size;
+}
+
+static size_t vxlan_mdb_nlmsg_size(const struct vxlan_dev *vxlan,
+ const struct vxlan_mdb_entry *mdb_entry,
+ const struct vxlan_mdb_remote *remote)
+{
+ const struct vxlan_mdb_entry_key *group = &mdb_entry->key;
+ struct vxlan_rdst *rd = rtnl_dereference(remote->rd);
+ size_t nlmsg_size;
+
+ nlmsg_size = NLMSG_ALIGN(sizeof(struct br_port_msg)) +
+ /* MDBA_MDB */
+ nla_total_size(0) +
+ /* MDBA_MDB_ENTRY */
+ nla_total_size(0) +
+ /* MDBA_MDB_ENTRY_INFO */
+ nla_total_size(sizeof(struct br_mdb_entry)) +
+ /* MDBA_MDB_EATTR_TIMER */
+ nla_total_size(sizeof(u32));
+ /* MDBA_MDB_EATTR_SOURCE */
+ if (vxlan_mdb_is_sg(group))
+ nlmsg_size += nla_total_size(vxlan_addr_size(&group->dst));
+ /* MDBA_MDB_EATTR_RTPROT */
+ nlmsg_size += nla_total_size(sizeof(u8));
+ /* MDBA_MDB_EATTR_SRC_LIST */
+ nlmsg_size += vxlan_mdb_nlmsg_src_list_size(group, remote);
+ /* MDBA_MDB_EATTR_GROUP_MODE */
+ nlmsg_size += nla_total_size(sizeof(u8));
+ /* MDBA_MDB_EATTR_DST */
+ nlmsg_size += nla_total_size(vxlan_addr_size(&rd->remote_ip));
+ /* MDBA_MDB_EATTR_DST_PORT */
+ if (rd->remote_port && rd->remote_port != vxlan->cfg.dst_port)
+ nlmsg_size += nla_total_size(sizeof(u16));
+ /* MDBA_MDB_EATTR_VNI */
+ if (rd->remote_vni != vxlan->default_dst.remote_vni)
+ nlmsg_size += nla_total_size(sizeof(u32));
+ /* MDBA_MDB_EATTR_IFINDEX */
+ if (rd->remote_ifindex)
+ nlmsg_size += nla_total_size(sizeof(u32));
+ /* MDBA_MDB_EATTR_SRC_VNI */
+ if ((vxlan->cfg.flags & VXLAN_F_COLLECT_METADATA) && group->vni)
+ nlmsg_size += nla_total_size(sizeof(u32));
+
+ return nlmsg_size;
+}
+
+static int vxlan_mdb_nlmsg_fill(const struct vxlan_dev *vxlan,
+ struct sk_buff *skb,
+ const struct vxlan_mdb_entry *mdb_entry,
+ const struct vxlan_mdb_remote *remote,
+ int type)
+{
+ struct nlattr *mdb_nest, *mdb_entry_nest;
+ struct br_port_msg *bpm;
+ struct nlmsghdr *nlh;
+
+ nlh = nlmsg_put(skb, 0, 0, type, sizeof(*bpm), 0);
+ if (!nlh)
+ return -EMSGSIZE;
+
+ bpm = nlmsg_data(nlh);
+ memset(bpm, 0, sizeof(*bpm));
+ bpm->family = AF_BRIDGE;
+ bpm->ifindex = vxlan->dev->ifindex;
+
+ mdb_nest = nla_nest_start_noflag(skb, MDBA_MDB);
+ if (!mdb_nest)
+ goto cancel;
+ mdb_entry_nest = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY);
+ if (!mdb_entry_nest)
+ goto cancel;
+
+ if (vxlan_mdb_entry_info_fill(vxlan, skb, mdb_entry, remote))
+ goto cancel;
+
+ nla_nest_end(skb, mdb_entry_nest);
+ nla_nest_end(skb, mdb_nest);
+ nlmsg_end(skb, nlh);
+
+ return 0;
+
+cancel:
+ nlmsg_cancel(skb, nlh);
+ return -EMSGSIZE;
+}
+
+static void vxlan_mdb_remote_notify(const struct vxlan_dev *vxlan,
+ const struct vxlan_mdb_entry *mdb_entry,
+ const struct vxlan_mdb_remote *remote,
+ int type)
+{
+ struct net *net = dev_net(vxlan->dev);
+ struct sk_buff *skb;
+ int err = -ENOBUFS;
+
+ skb = nlmsg_new(vxlan_mdb_nlmsg_size(vxlan, mdb_entry, remote),
+ GFP_KERNEL);
+ if (!skb)
+ goto errout;
+
+ err = vxlan_mdb_nlmsg_fill(vxlan, skb, mdb_entry, remote, type);
+ if (err) {
+ kfree_skb(skb);
+ goto errout;
+ }
+
+ rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_KERNEL);
+ return;
+errout:
+ rtnl_set_sk_err(net, RTNLGRP_MDB, err);
+}
+
+static int
+vxlan_mdb_remote_srcs_replace(const struct vxlan_mdb_config *cfg,
+ const struct vxlan_mdb_entry *mdb_entry,
+ struct vxlan_mdb_remote *remote,
+ struct netlink_ext_ack *extack)
+{
+ struct vxlan_dev *vxlan = cfg->vxlan;
+ struct vxlan_mdb_src_entry *ent;
+ struct hlist_node *tmp;
+ int err;
+
+ hlist_for_each_entry(ent, &remote->src_list, node)
+ ent->flags |= VXLAN_SGRP_F_DELETE;
+
+ err = vxlan_mdb_remote_srcs_add(cfg, remote, extack);
+ if (err)
+ goto err_clear_delete;
+
+ hlist_for_each_entry_safe(ent, tmp, &remote->src_list, node) {
+ if (ent->flags & VXLAN_SGRP_F_DELETE)
+ vxlan_mdb_remote_src_del(vxlan, &mdb_entry->key, remote,
+ ent);
+ }
+
+ return 0;
+
+err_clear_delete:
+ hlist_for_each_entry(ent, &remote->src_list, node)
+ ent->flags &= ~VXLAN_SGRP_F_DELETE;
+ return err;
+}
+
+static int vxlan_mdb_remote_replace(const struct vxlan_mdb_config *cfg,
+ const struct vxlan_mdb_entry *mdb_entry,
+ struct vxlan_mdb_remote *remote,
+ struct netlink_ext_ack *extack)
+{
+ struct vxlan_rdst *new_rd, *old_rd = rtnl_dereference(remote->rd);
+ struct vxlan_dev *vxlan = cfg->vxlan;
+ int err;
+
+ err = vxlan_mdb_remote_rdst_init(cfg, remote);
+ if (err)
+ return err;
+ new_rd = rtnl_dereference(remote->rd);
+
+ err = vxlan_mdb_remote_srcs_replace(cfg, mdb_entry, remote, extack);
+ if (err)
+ goto err_rdst_reset;
+
+ WRITE_ONCE(remote->flags, cfg->flags);
+ WRITE_ONCE(remote->filter_mode, cfg->filter_mode);
+ remote->rt_protocol = cfg->rt_protocol;
+ vxlan_mdb_remote_notify(vxlan, mdb_entry, remote, RTM_NEWMDB);
+
+ vxlan_mdb_remote_rdst_fini(old_rd);
+
+ return 0;
+
+err_rdst_reset:
+ rcu_assign_pointer(remote->rd, old_rd);
+ vxlan_mdb_remote_rdst_fini(new_rd);
+ return err;
+}
+
+static int vxlan_mdb_remote_add(const struct vxlan_mdb_config *cfg,
+ struct vxlan_mdb_entry *mdb_entry,
+ struct netlink_ext_ack *extack)
+{
+ struct vxlan_mdb_remote *remote;
+ int err;
+
+ remote = vxlan_mdb_remote_lookup(mdb_entry, &cfg->remote_ip);
+ if (remote) {
+ if (!(cfg->nlflags & NLM_F_REPLACE)) {
+ NL_SET_ERR_MSG_MOD(extack, "Replace not specified and MDB remote entry already exists");
+ return -EEXIST;
+ }
+ return vxlan_mdb_remote_replace(cfg, mdb_entry, remote, extack);
+ }
+
+ if (!(cfg->nlflags & NLM_F_CREATE)) {
+ NL_SET_ERR_MSG_MOD(extack, "Create not specified and entry does not exist");
+ return -ENOENT;
+ }
+
+ remote = kzalloc(sizeof(*remote), GFP_KERNEL);
+ if (!remote)
+ return -ENOMEM;
+
+ err = vxlan_mdb_remote_init(cfg, remote);
+ if (err) {
+ NL_SET_ERR_MSG_MOD(extack, "Failed to initialize remote MDB entry");
+ goto err_free_remote;
+ }
+
+ err = vxlan_mdb_remote_srcs_add(cfg, remote, extack);
+ if (err)
+ goto err_remote_fini;
+
+ list_add_rcu(&remote->list, &mdb_entry->remotes);
+ vxlan_mdb_remote_notify(cfg->vxlan, mdb_entry, remote, RTM_NEWMDB);
+
+ return 0;
+
+err_remote_fini:
+ vxlan_mdb_remote_fini(cfg->vxlan, remote);
+err_free_remote:
+ kfree(remote);
+ return err;
+}
+
+static void vxlan_mdb_remote_del(struct vxlan_dev *vxlan,
+ struct vxlan_mdb_entry *mdb_entry,
+ struct vxlan_mdb_remote *remote)
+{
+ vxlan_mdb_remote_notify(vxlan, mdb_entry, remote, RTM_DELMDB);
+ list_del_rcu(&remote->list);
+ vxlan_mdb_remote_srcs_del(vxlan, &mdb_entry->key, remote);
+ vxlan_mdb_remote_fini(vxlan, remote);
+ kfree_rcu(remote, rcu);
+}
+
+static struct vxlan_mdb_entry *
+vxlan_mdb_entry_get(struct vxlan_dev *vxlan,
+ const struct vxlan_mdb_entry_key *group)
+{
+ struct vxlan_mdb_entry *mdb_entry;
+ int err;
+
+ mdb_entry = vxlan_mdb_entry_lookup(vxlan, group);
+ if (mdb_entry)
+ return mdb_entry;
+
+ mdb_entry = kzalloc(sizeof(*mdb_entry), GFP_KERNEL);
+ if (!mdb_entry)
+ return ERR_PTR(-ENOMEM);
+
+ INIT_LIST_HEAD(&mdb_entry->remotes);
+ memcpy(&mdb_entry->key, group, sizeof(mdb_entry->key));
+ hlist_add_head(&mdb_entry->mdb_node, &vxlan->mdb_list);
+
+ err = rhashtable_lookup_insert_fast(&vxlan->mdb_tbl,
+ &mdb_entry->rhnode,
+ vxlan_mdb_rht_params);
+ if (err)
+ goto err_free_entry;
+
+ return mdb_entry;
+
+err_free_entry:
+ hlist_del(&mdb_entry->mdb_node);
+ kfree(mdb_entry);
+ return ERR_PTR(err);
+}
+
+static void vxlan_mdb_entry_put(struct vxlan_dev *vxlan,
+ struct vxlan_mdb_entry *mdb_entry)
+{
+ if (!list_empty(&mdb_entry->remotes))
+ return;
+
+ rhashtable_remove_fast(&vxlan->mdb_tbl, &mdb_entry->rhnode,
+ vxlan_mdb_rht_params);
+ hlist_del(&mdb_entry->mdb_node);
+ kfree_rcu(mdb_entry, rcu);
+}
+
+static int __vxlan_mdb_add(const struct vxlan_mdb_config *cfg,
+ struct netlink_ext_ack *extack)
+{
+ struct vxlan_dev *vxlan = cfg->vxlan;
+ struct vxlan_mdb_entry *mdb_entry;
+ int err;
+
+ mdb_entry = vxlan_mdb_entry_get(vxlan, &cfg->group);
+ if (IS_ERR(mdb_entry))
+ return PTR_ERR(mdb_entry);
+
+ err = vxlan_mdb_remote_add(cfg, mdb_entry, extack);
+ if (err)
+ goto err_entry_put;
+
+ vxlan->mdb_seq++;
+
+ return 0;
+
+err_entry_put:
+ vxlan_mdb_entry_put(vxlan, mdb_entry);
+ return err;
+}
+
+static int __vxlan_mdb_del(const struct vxlan_mdb_config *cfg,
+ struct netlink_ext_ack *extack)
+{
+ struct vxlan_dev *vxlan = cfg->vxlan;
+ struct vxlan_mdb_entry *mdb_entry;
+ struct vxlan_mdb_remote *remote;
+
+ mdb_entry = vxlan_mdb_entry_lookup(vxlan, &cfg->group);
+ if (!mdb_entry) {
+ NL_SET_ERR_MSG_MOD(extack, "Did not find MDB entry");
+ return -ENOENT;
+ }
+
+ remote = vxlan_mdb_remote_lookup(mdb_entry, &cfg->remote_ip);
+ if (!remote) {
+ NL_SET_ERR_MSG_MOD(extack, "Did not find MDB remote entry");
+ return -ENOENT;
+ }
+
+ vxlan_mdb_remote_del(vxlan, mdb_entry, remote);
+ vxlan_mdb_entry_put(vxlan, mdb_entry);
+
+ vxlan->mdb_seq++;
+
+ return 0;
+}
+
+int vxlan_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags,
+ struct netlink_ext_ack *extack)
+{
+ struct vxlan_mdb_config cfg;
+ int err;
+
+ ASSERT_RTNL();
+
+ err = vxlan_mdb_config_init(&cfg, dev, tb, nlmsg_flags, extack);
+ if (err)
+ return err;
+
+ err = __vxlan_mdb_add(&cfg, extack);
+
+ vxlan_mdb_config_fini(&cfg);
+ return err;
+}
+
+int vxlan_mdb_del(struct net_device *dev, struct nlattr *tb[],
+ struct netlink_ext_ack *extack)
+{
+ struct vxlan_mdb_config cfg;
+ int err;
+
+ ASSERT_RTNL();
+
+ err = vxlan_mdb_config_init(&cfg, dev, tb, 0, extack);
+ if (err)
+ return err;
+
+ err = __vxlan_mdb_del(&cfg, extack);
+
+ vxlan_mdb_config_fini(&cfg);
+ return err;
+}
+
+static void vxlan_mdb_check_empty(void *ptr, void *arg)
+{
+ WARN_ON_ONCE(1);
+}
+
+static void vxlan_mdb_remotes_flush(struct vxlan_dev *vxlan,
+ struct vxlan_mdb_entry *mdb_entry)
+{
+ struct vxlan_mdb_remote *remote, *tmp;
+
+ list_for_each_entry_safe(remote, tmp, &mdb_entry->remotes, list)
+ vxlan_mdb_remote_del(vxlan, mdb_entry, remote);
+}
+
+static void vxlan_mdb_entries_flush(struct vxlan_dev *vxlan)
+{
+ struct vxlan_mdb_entry *mdb_entry;
+ struct hlist_node *tmp;
+
+ /* The removal of an entry cannot trigger the removal of another entry
+ * since entries are always added to the head of the list.
+ */
+ hlist_for_each_entry_safe(mdb_entry, tmp, &vxlan->mdb_list, mdb_node) {
+ vxlan_mdb_remotes_flush(vxlan, mdb_entry);
+ vxlan_mdb_entry_put(vxlan, mdb_entry);
+ }
+}
+
+int vxlan_mdb_init(struct vxlan_dev *vxlan)
+{
+ int err;
+
+ err = rhashtable_init(&vxlan->mdb_tbl, &vxlan_mdb_rht_params);
+ if (err)
+ return err;
+
+ INIT_HLIST_HEAD(&vxlan->mdb_list);
+
+ return 0;
+}
+
+void vxlan_mdb_fini(struct vxlan_dev *vxlan)
+{
+ vxlan_mdb_entries_flush(vxlan);
+ rhashtable_free_and_destroy(&vxlan->mdb_tbl, vxlan_mdb_check_empty,
+ NULL);
+}
projects / users / jedix / linux-maple.git / commitdiff