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![Ido Schimmel](/assets/img/avatar_default.png)
In the upcoming VXLAN MDB implementation, the 0.0.0.0 and :: MDB entries will act as catchall entries for unregistered IP multicast traffic in a similar fashion to the 00:00:00:00:00:00 VXLAN FDB entry that is used to transmit BUM traffic. In deployments where inter-subnet multicast forwarding is used, not all the VTEPs in a tenant domain are members in all the broadcast domains. It is therefore advantageous to transmit BULL (broadcast, unknown unicast and link-local multicast) and unregistered IP multicast traffic on different tunnels. If the same tunnel was used, a VTEP only interested in IP multicast traffic would also pull all the BULL traffic and drop it as it is not a member in the originating broadcast domain [1]. Prepare for this change by allowing the 0.0.0.0 group address in the common rtnetlink MDB code and forbid it in the bridge driver. A similar change is not needed for IPv6 because the common code only validates that the group address is not the all-nodes address. [1] https://datatracker.ietf.org/doc/html/draft-ietf-bess-evpn-irb-mcast#section-2.6 Signed-off-by: Ido Schimmel <idosch@nvidia.com> Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org> Signed-off-by: David S. Miller <davem@davemloft.net>
1403 lines
34 KiB
C
1403 lines
34 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/err.h>
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#include <linux/igmp.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/rculist.h>
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#include <linux/skbuff.h>
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#include <linux/if_ether.h>
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#include <net/ip.h>
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#include <net/netlink.h>
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#include <net/switchdev.h>
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#if IS_ENABLED(CONFIG_IPV6)
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#include <net/ipv6.h>
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#include <net/addrconf.h>
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#endif
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#include "br_private.h"
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static bool
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br_ip4_rports_get_timer(struct net_bridge_mcast_port *pmctx,
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unsigned long *timer)
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{
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*timer = br_timer_value(&pmctx->ip4_mc_router_timer);
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return !hlist_unhashed(&pmctx->ip4_rlist);
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}
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static bool
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br_ip6_rports_get_timer(struct net_bridge_mcast_port *pmctx,
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unsigned long *timer)
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{
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#if IS_ENABLED(CONFIG_IPV6)
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*timer = br_timer_value(&pmctx->ip6_mc_router_timer);
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return !hlist_unhashed(&pmctx->ip6_rlist);
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#else
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*timer = 0;
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return false;
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#endif
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}
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static size_t __br_rports_one_size(void)
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{
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return nla_total_size(sizeof(u32)) + /* MDBA_ROUTER_PORT */
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nla_total_size(sizeof(u32)) + /* MDBA_ROUTER_PATTR_TIMER */
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nla_total_size(sizeof(u8)) + /* MDBA_ROUTER_PATTR_TYPE */
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nla_total_size(sizeof(u32)) + /* MDBA_ROUTER_PATTR_INET_TIMER */
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nla_total_size(sizeof(u32)) + /* MDBA_ROUTER_PATTR_INET6_TIMER */
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nla_total_size(sizeof(u32)); /* MDBA_ROUTER_PATTR_VID */
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}
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size_t br_rports_size(const struct net_bridge_mcast *brmctx)
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{
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struct net_bridge_mcast_port *pmctx;
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size_t size = nla_total_size(0); /* MDBA_ROUTER */
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rcu_read_lock();
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hlist_for_each_entry_rcu(pmctx, &brmctx->ip4_mc_router_list,
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ip4_rlist)
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size += __br_rports_one_size();
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#if IS_ENABLED(CONFIG_IPV6)
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hlist_for_each_entry_rcu(pmctx, &brmctx->ip6_mc_router_list,
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ip6_rlist)
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size += __br_rports_one_size();
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#endif
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rcu_read_unlock();
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return size;
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}
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int br_rports_fill_info(struct sk_buff *skb,
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const struct net_bridge_mcast *brmctx)
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{
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u16 vid = brmctx->vlan ? brmctx->vlan->vid : 0;
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bool have_ip4_mc_rtr, have_ip6_mc_rtr;
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unsigned long ip4_timer, ip6_timer;
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struct nlattr *nest, *port_nest;
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struct net_bridge_port *p;
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if (!brmctx->multicast_router || !br_rports_have_mc_router(brmctx))
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return 0;
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nest = nla_nest_start_noflag(skb, MDBA_ROUTER);
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if (nest == NULL)
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return -EMSGSIZE;
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list_for_each_entry_rcu(p, &brmctx->br->port_list, list) {
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struct net_bridge_mcast_port *pmctx;
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if (vid) {
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struct net_bridge_vlan *v;
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v = br_vlan_find(nbp_vlan_group(p), vid);
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if (!v)
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continue;
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pmctx = &v->port_mcast_ctx;
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} else {
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pmctx = &p->multicast_ctx;
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}
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have_ip4_mc_rtr = br_ip4_rports_get_timer(pmctx, &ip4_timer);
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have_ip6_mc_rtr = br_ip6_rports_get_timer(pmctx, &ip6_timer);
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if (!have_ip4_mc_rtr && !have_ip6_mc_rtr)
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continue;
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port_nest = nla_nest_start_noflag(skb, MDBA_ROUTER_PORT);
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if (!port_nest)
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goto fail;
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if (nla_put_nohdr(skb, sizeof(u32), &p->dev->ifindex) ||
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nla_put_u32(skb, MDBA_ROUTER_PATTR_TIMER,
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max(ip4_timer, ip6_timer)) ||
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nla_put_u8(skb, MDBA_ROUTER_PATTR_TYPE,
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p->multicast_ctx.multicast_router) ||
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(have_ip4_mc_rtr &&
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nla_put_u32(skb, MDBA_ROUTER_PATTR_INET_TIMER,
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ip4_timer)) ||
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(have_ip6_mc_rtr &&
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nla_put_u32(skb, MDBA_ROUTER_PATTR_INET6_TIMER,
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ip6_timer)) ||
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(vid && nla_put_u16(skb, MDBA_ROUTER_PATTR_VID, vid))) {
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nla_nest_cancel(skb, port_nest);
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goto fail;
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}
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nla_nest_end(skb, port_nest);
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}
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nla_nest_end(skb, nest);
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return 0;
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fail:
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nla_nest_cancel(skb, nest);
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return -EMSGSIZE;
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}
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static void __mdb_entry_fill_flags(struct br_mdb_entry *e, unsigned char flags)
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{
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e->state = flags & MDB_PG_FLAGS_PERMANENT;
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e->flags = 0;
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if (flags & MDB_PG_FLAGS_OFFLOAD)
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e->flags |= MDB_FLAGS_OFFLOAD;
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if (flags & MDB_PG_FLAGS_FAST_LEAVE)
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e->flags |= MDB_FLAGS_FAST_LEAVE;
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if (flags & MDB_PG_FLAGS_STAR_EXCL)
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e->flags |= MDB_FLAGS_STAR_EXCL;
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if (flags & MDB_PG_FLAGS_BLOCKED)
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e->flags |= MDB_FLAGS_BLOCKED;
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}
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static void __mdb_entry_to_br_ip(struct br_mdb_entry *entry, struct br_ip *ip,
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struct nlattr **mdb_attrs)
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{
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memset(ip, 0, sizeof(struct br_ip));
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ip->vid = entry->vid;
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ip->proto = entry->addr.proto;
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switch (ip->proto) {
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case htons(ETH_P_IP):
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ip->dst.ip4 = entry->addr.u.ip4;
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if (mdb_attrs && mdb_attrs[MDBE_ATTR_SOURCE])
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ip->src.ip4 = nla_get_in_addr(mdb_attrs[MDBE_ATTR_SOURCE]);
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break;
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#if IS_ENABLED(CONFIG_IPV6)
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case htons(ETH_P_IPV6):
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ip->dst.ip6 = entry->addr.u.ip6;
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if (mdb_attrs && mdb_attrs[MDBE_ATTR_SOURCE])
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ip->src.ip6 = nla_get_in6_addr(mdb_attrs[MDBE_ATTR_SOURCE]);
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break;
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#endif
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default:
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ether_addr_copy(ip->dst.mac_addr, entry->addr.u.mac_addr);
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}
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}
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static int __mdb_fill_srcs(struct sk_buff *skb,
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struct net_bridge_port_group *p)
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{
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struct net_bridge_group_src *ent;
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struct nlattr *nest, *nest_ent;
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if (hlist_empty(&p->src_list))
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return 0;
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nest = nla_nest_start(skb, MDBA_MDB_EATTR_SRC_LIST);
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if (!nest)
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return -EMSGSIZE;
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hlist_for_each_entry_rcu(ent, &p->src_list, node,
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lockdep_is_held(&p->key.port->br->multicast_lock)) {
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nest_ent = nla_nest_start(skb, MDBA_MDB_SRCLIST_ENTRY);
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if (!nest_ent)
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goto out_cancel_err;
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switch (ent->addr.proto) {
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case htons(ETH_P_IP):
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if (nla_put_in_addr(skb, MDBA_MDB_SRCATTR_ADDRESS,
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ent->addr.src.ip4)) {
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nla_nest_cancel(skb, nest_ent);
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goto out_cancel_err;
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}
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break;
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#if IS_ENABLED(CONFIG_IPV6)
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case htons(ETH_P_IPV6):
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if (nla_put_in6_addr(skb, MDBA_MDB_SRCATTR_ADDRESS,
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&ent->addr.src.ip6)) {
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nla_nest_cancel(skb, nest_ent);
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goto out_cancel_err;
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}
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break;
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#endif
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default:
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nla_nest_cancel(skb, nest_ent);
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continue;
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}
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if (nla_put_u32(skb, MDBA_MDB_SRCATTR_TIMER,
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br_timer_value(&ent->timer))) {
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nla_nest_cancel(skb, nest_ent);
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goto out_cancel_err;
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}
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nla_nest_end(skb, nest_ent);
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}
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nla_nest_end(skb, nest);
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return 0;
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out_cancel_err:
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nla_nest_cancel(skb, nest);
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return -EMSGSIZE;
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}
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static int __mdb_fill_info(struct sk_buff *skb,
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struct net_bridge_mdb_entry *mp,
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struct net_bridge_port_group *p)
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{
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bool dump_srcs_mode = false;
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struct timer_list *mtimer;
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struct nlattr *nest_ent;
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struct br_mdb_entry e;
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u8 flags = 0;
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int ifindex;
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memset(&e, 0, sizeof(e));
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if (p) {
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ifindex = p->key.port->dev->ifindex;
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mtimer = &p->timer;
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flags = p->flags;
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} else {
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ifindex = mp->br->dev->ifindex;
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mtimer = &mp->timer;
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}
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__mdb_entry_fill_flags(&e, flags);
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e.ifindex = ifindex;
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e.vid = mp->addr.vid;
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if (mp->addr.proto == htons(ETH_P_IP)) {
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e.addr.u.ip4 = mp->addr.dst.ip4;
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#if IS_ENABLED(CONFIG_IPV6)
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} else if (mp->addr.proto == htons(ETH_P_IPV6)) {
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e.addr.u.ip6 = mp->addr.dst.ip6;
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#endif
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} else {
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ether_addr_copy(e.addr.u.mac_addr, mp->addr.dst.mac_addr);
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e.state = MDB_PERMANENT;
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}
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e.addr.proto = mp->addr.proto;
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nest_ent = nla_nest_start_noflag(skb,
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MDBA_MDB_ENTRY_INFO);
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if (!nest_ent)
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return -EMSGSIZE;
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if (nla_put_nohdr(skb, sizeof(e), &e) ||
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nla_put_u32(skb,
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MDBA_MDB_EATTR_TIMER,
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br_timer_value(mtimer)))
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goto nest_err;
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switch (mp->addr.proto) {
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case htons(ETH_P_IP):
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dump_srcs_mode = !!(mp->br->multicast_ctx.multicast_igmp_version == 3);
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if (mp->addr.src.ip4) {
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if (nla_put_in_addr(skb, MDBA_MDB_EATTR_SOURCE,
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mp->addr.src.ip4))
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goto nest_err;
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break;
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}
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break;
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#if IS_ENABLED(CONFIG_IPV6)
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case htons(ETH_P_IPV6):
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dump_srcs_mode = !!(mp->br->multicast_ctx.multicast_mld_version == 2);
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if (!ipv6_addr_any(&mp->addr.src.ip6)) {
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if (nla_put_in6_addr(skb, MDBA_MDB_EATTR_SOURCE,
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&mp->addr.src.ip6))
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goto nest_err;
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break;
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}
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break;
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#endif
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default:
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ether_addr_copy(e.addr.u.mac_addr, mp->addr.dst.mac_addr);
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}
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if (p) {
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if (nla_put_u8(skb, MDBA_MDB_EATTR_RTPROT, p->rt_protocol))
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goto nest_err;
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if (dump_srcs_mode &&
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(__mdb_fill_srcs(skb, p) ||
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nla_put_u8(skb, MDBA_MDB_EATTR_GROUP_MODE,
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p->filter_mode)))
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goto nest_err;
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}
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nla_nest_end(skb, nest_ent);
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return 0;
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nest_err:
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nla_nest_cancel(skb, nest_ent);
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return -EMSGSIZE;
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}
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static int br_mdb_fill_info(struct sk_buff *skb, struct netlink_callback *cb,
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struct net_device *dev)
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{
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int idx = 0, s_idx = cb->args[1], err = 0, pidx = 0, s_pidx = cb->args[2];
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struct net_bridge *br = netdev_priv(dev);
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struct net_bridge_mdb_entry *mp;
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struct nlattr *nest, *nest2;
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if (!br_opt_get(br, BROPT_MULTICAST_ENABLED))
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return 0;
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nest = nla_nest_start_noflag(skb, MDBA_MDB);
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if (nest == NULL)
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return -EMSGSIZE;
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hlist_for_each_entry_rcu(mp, &br->mdb_list, mdb_node) {
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struct net_bridge_port_group *p;
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struct net_bridge_port_group __rcu **pp;
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if (idx < s_idx)
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goto skip;
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nest2 = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY);
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if (!nest2) {
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err = -EMSGSIZE;
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break;
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}
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if (!s_pidx && mp->host_joined) {
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err = __mdb_fill_info(skb, mp, NULL);
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if (err) {
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nla_nest_cancel(skb, nest2);
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break;
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}
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}
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for (pp = &mp->ports; (p = rcu_dereference(*pp)) != NULL;
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pp = &p->next) {
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if (!p->key.port)
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continue;
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if (pidx < s_pidx)
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goto skip_pg;
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err = __mdb_fill_info(skb, mp, p);
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if (err) {
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nla_nest_end(skb, nest2);
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goto out;
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}
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skip_pg:
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pidx++;
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}
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pidx = 0;
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s_pidx = 0;
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nla_nest_end(skb, nest2);
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skip:
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idx++;
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}
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out:
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cb->args[1] = idx;
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cb->args[2] = pidx;
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nla_nest_end(skb, nest);
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return err;
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}
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|
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int br_mdb_dump(struct net_device *dev, struct sk_buff *skb,
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struct netlink_callback *cb)
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{
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struct net_bridge *br = netdev_priv(dev);
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struct br_port_msg *bpm;
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struct nlmsghdr *nlh;
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int err;
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nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
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cb->nlh->nlmsg_seq, RTM_GETMDB, sizeof(*bpm),
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NLM_F_MULTI);
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if (!nlh)
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return -EMSGSIZE;
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bpm = nlmsg_data(nlh);
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memset(bpm, 0, sizeof(*bpm));
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bpm->ifindex = dev->ifindex;
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rcu_read_lock();
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err = br_mdb_fill_info(skb, cb, dev);
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if (err)
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goto out;
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err = br_rports_fill_info(skb, &br->multicast_ctx);
|
|
if (err)
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goto out;
|
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|
|
out:
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rcu_read_unlock();
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nlmsg_end(skb, nlh);
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return err;
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}
|
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|
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static int nlmsg_populate_mdb_fill(struct sk_buff *skb,
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struct net_device *dev,
|
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struct net_bridge_mdb_entry *mp,
|
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struct net_bridge_port_group *pg,
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int type)
|
|
{
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|
struct nlmsghdr *nlh;
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struct br_port_msg *bpm;
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struct nlattr *nest, *nest2;
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|
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nlh = nlmsg_put(skb, 0, 0, type, sizeof(*bpm), 0);
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if (!nlh)
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return -EMSGSIZE;
|
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bpm = nlmsg_data(nlh);
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memset(bpm, 0, sizeof(*bpm));
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bpm->family = AF_BRIDGE;
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bpm->ifindex = dev->ifindex;
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nest = nla_nest_start_noflag(skb, MDBA_MDB);
|
|
if (nest == NULL)
|
|
goto cancel;
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|
nest2 = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY);
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|
if (nest2 == NULL)
|
|
goto end;
|
|
|
|
if (__mdb_fill_info(skb, mp, pg))
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|
goto end;
|
|
|
|
nla_nest_end(skb, nest2);
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|
nla_nest_end(skb, nest);
|
|
nlmsg_end(skb, nlh);
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return 0;
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|
|
end:
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|
nla_nest_end(skb, nest);
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|
cancel:
|
|
nlmsg_cancel(skb, nlh);
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|
return -EMSGSIZE;
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|
}
|
|
|
|
static size_t rtnl_mdb_nlmsg_size(struct net_bridge_port_group *pg)
|
|
{
|
|
size_t nlmsg_size = NLMSG_ALIGN(sizeof(struct br_port_msg)) +
|
|
nla_total_size(sizeof(struct br_mdb_entry)) +
|
|
nla_total_size(sizeof(u32));
|
|
struct net_bridge_group_src *ent;
|
|
size_t addr_size = 0;
|
|
|
|
if (!pg)
|
|
goto out;
|
|
|
|
/* MDBA_MDB_EATTR_RTPROT */
|
|
nlmsg_size += nla_total_size(sizeof(u8));
|
|
|
|
switch (pg->key.addr.proto) {
|
|
case htons(ETH_P_IP):
|
|
/* MDBA_MDB_EATTR_SOURCE */
|
|
if (pg->key.addr.src.ip4)
|
|
nlmsg_size += nla_total_size(sizeof(__be32));
|
|
if (pg->key.port->br->multicast_ctx.multicast_igmp_version == 2)
|
|
goto out;
|
|
addr_size = sizeof(__be32);
|
|
break;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
case htons(ETH_P_IPV6):
|
|
/* MDBA_MDB_EATTR_SOURCE */
|
|
if (!ipv6_addr_any(&pg->key.addr.src.ip6))
|
|
nlmsg_size += nla_total_size(sizeof(struct in6_addr));
|
|
if (pg->key.port->br->multicast_ctx.multicast_mld_version == 1)
|
|
goto out;
|
|
addr_size = sizeof(struct in6_addr);
|
|
break;
|
|
#endif
|
|
}
|
|
|
|
/* MDBA_MDB_EATTR_GROUP_MODE */
|
|
nlmsg_size += nla_total_size(sizeof(u8));
|
|
|
|
/* MDBA_MDB_EATTR_SRC_LIST nested attr */
|
|
if (!hlist_empty(&pg->src_list))
|
|
nlmsg_size += nla_total_size(0);
|
|
|
|
hlist_for_each_entry(ent, &pg->src_list, node) {
|
|
/* MDBA_MDB_SRCLIST_ENTRY nested attr +
|
|
* MDBA_MDB_SRCATTR_ADDRESS + MDBA_MDB_SRCATTR_TIMER
|
|
*/
|
|
nlmsg_size += nla_total_size(0) +
|
|
nla_total_size(addr_size) +
|
|
nla_total_size(sizeof(u32));
|
|
}
|
|
out:
|
|
return nlmsg_size;
|
|
}
|
|
|
|
void br_mdb_notify(struct net_device *dev,
|
|
struct net_bridge_mdb_entry *mp,
|
|
struct net_bridge_port_group *pg,
|
|
int type)
|
|
{
|
|
struct net *net = dev_net(dev);
|
|
struct sk_buff *skb;
|
|
int err = -ENOBUFS;
|
|
|
|
br_switchdev_mdb_notify(dev, mp, pg, type);
|
|
|
|
skb = nlmsg_new(rtnl_mdb_nlmsg_size(pg), GFP_ATOMIC);
|
|
if (!skb)
|
|
goto errout;
|
|
|
|
err = nlmsg_populate_mdb_fill(skb, dev, mp, pg, type);
|
|
if (err < 0) {
|
|
kfree_skb(skb);
|
|
goto errout;
|
|
}
|
|
|
|
rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
|
|
return;
|
|
errout:
|
|
rtnl_set_sk_err(net, RTNLGRP_MDB, err);
|
|
}
|
|
|
|
static int nlmsg_populate_rtr_fill(struct sk_buff *skb,
|
|
struct net_device *dev,
|
|
int ifindex, u16 vid, u32 pid,
|
|
u32 seq, int type, unsigned int flags)
|
|
{
|
|
struct nlattr *nest, *port_nest;
|
|
struct br_port_msg *bpm;
|
|
struct nlmsghdr *nlh;
|
|
|
|
nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), 0);
|
|
if (!nlh)
|
|
return -EMSGSIZE;
|
|
|
|
bpm = nlmsg_data(nlh);
|
|
memset(bpm, 0, sizeof(*bpm));
|
|
bpm->family = AF_BRIDGE;
|
|
bpm->ifindex = dev->ifindex;
|
|
nest = nla_nest_start_noflag(skb, MDBA_ROUTER);
|
|
if (!nest)
|
|
goto cancel;
|
|
|
|
port_nest = nla_nest_start_noflag(skb, MDBA_ROUTER_PORT);
|
|
if (!port_nest)
|
|
goto end;
|
|
if (nla_put_nohdr(skb, sizeof(u32), &ifindex)) {
|
|
nla_nest_cancel(skb, port_nest);
|
|
goto end;
|
|
}
|
|
if (vid && nla_put_u16(skb, MDBA_ROUTER_PATTR_VID, vid)) {
|
|
nla_nest_cancel(skb, port_nest);
|
|
goto end;
|
|
}
|
|
nla_nest_end(skb, port_nest);
|
|
|
|
nla_nest_end(skb, nest);
|
|
nlmsg_end(skb, nlh);
|
|
return 0;
|
|
|
|
end:
|
|
nla_nest_end(skb, nest);
|
|
cancel:
|
|
nlmsg_cancel(skb, nlh);
|
|
return -EMSGSIZE;
|
|
}
|
|
|
|
static inline size_t rtnl_rtr_nlmsg_size(void)
|
|
{
|
|
return NLMSG_ALIGN(sizeof(struct br_port_msg))
|
|
+ nla_total_size(sizeof(__u32))
|
|
+ nla_total_size(sizeof(u16));
|
|
}
|
|
|
|
void br_rtr_notify(struct net_device *dev, struct net_bridge_mcast_port *pmctx,
|
|
int type)
|
|
{
|
|
struct net *net = dev_net(dev);
|
|
struct sk_buff *skb;
|
|
int err = -ENOBUFS;
|
|
int ifindex;
|
|
u16 vid;
|
|
|
|
ifindex = pmctx ? pmctx->port->dev->ifindex : 0;
|
|
vid = pmctx && br_multicast_port_ctx_is_vlan(pmctx) ? pmctx->vlan->vid :
|
|
0;
|
|
skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC);
|
|
if (!skb)
|
|
goto errout;
|
|
|
|
err = nlmsg_populate_rtr_fill(skb, dev, ifindex, vid, 0, 0, type,
|
|
NTF_SELF);
|
|
if (err < 0) {
|
|
kfree_skb(skb);
|
|
goto errout;
|
|
}
|
|
|
|
rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
|
|
return;
|
|
|
|
errout:
|
|
rtnl_set_sk_err(net, RTNLGRP_MDB, err);
|
|
}
|
|
|
|
static const struct nla_policy
|
|
br_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
|
|
br_mdbe_src_list_pol[MDBE_SRC_LIST_MAX + 1] = {
|
|
[MDBE_SRC_LIST_ENTRY] = NLA_POLICY_NESTED(br_mdbe_src_list_entry_pol),
|
|
};
|
|
|
|
static const struct nla_policy br_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(br_mdbe_src_list_pol),
|
|
[MDBE_ATTR_RTPROT] = NLA_POLICY_MIN(NLA_U8, RTPROT_STATIC),
|
|
};
|
|
|
|
static bool is_valid_mdb_source(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 struct net_bridge_mcast *
|
|
__br_mdb_choose_context(struct net_bridge *br,
|
|
const struct br_mdb_entry *entry,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net_bridge_mcast *brmctx = NULL;
|
|
struct net_bridge_vlan *v;
|
|
|
|
if (!br_opt_get(br, BROPT_MCAST_VLAN_SNOOPING_ENABLED)) {
|
|
brmctx = &br->multicast_ctx;
|
|
goto out;
|
|
}
|
|
|
|
if (!entry->vid) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Cannot add an entry without a vlan when vlan snooping is enabled");
|
|
goto out;
|
|
}
|
|
|
|
v = br_vlan_find(br_vlan_group(br), entry->vid);
|
|
if (!v) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Vlan is not configured");
|
|
goto out;
|
|
}
|
|
if (br_multicast_ctx_vlan_global_disabled(&v->br_mcast_ctx)) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Vlan's multicast processing is disabled");
|
|
goto out;
|
|
}
|
|
brmctx = &v->br_mcast_ctx;
|
|
out:
|
|
return brmctx;
|
|
}
|
|
|
|
static int br_mdb_replace_group_sg(const struct br_mdb_config *cfg,
|
|
struct net_bridge_mdb_entry *mp,
|
|
struct net_bridge_port_group *pg,
|
|
struct net_bridge_mcast *brmctx,
|
|
unsigned char flags)
|
|
{
|
|
unsigned long now = jiffies;
|
|
|
|
pg->flags = flags;
|
|
pg->rt_protocol = cfg->rt_protocol;
|
|
if (!(flags & MDB_PG_FLAGS_PERMANENT) && !cfg->src_entry)
|
|
mod_timer(&pg->timer,
|
|
now + brmctx->multicast_membership_interval);
|
|
else
|
|
del_timer(&pg->timer);
|
|
|
|
br_mdb_notify(cfg->br->dev, mp, pg, RTM_NEWMDB);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int br_mdb_add_group_sg(const struct br_mdb_config *cfg,
|
|
struct net_bridge_mdb_entry *mp,
|
|
struct net_bridge_mcast *brmctx,
|
|
unsigned char flags,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net_bridge_port_group __rcu **pp;
|
|
struct net_bridge_port_group *p;
|
|
unsigned long now = jiffies;
|
|
|
|
for (pp = &mp->ports;
|
|
(p = mlock_dereference(*pp, cfg->br)) != NULL;
|
|
pp = &p->next) {
|
|
if (p->key.port == cfg->p) {
|
|
if (!(cfg->nlflags & NLM_F_REPLACE)) {
|
|
NL_SET_ERR_MSG_MOD(extack, "(S, G) group is already joined by port");
|
|
return -EEXIST;
|
|
}
|
|
return br_mdb_replace_group_sg(cfg, mp, p, brmctx,
|
|
flags);
|
|
}
|
|
if ((unsigned long)p->key.port < (unsigned long)cfg->p)
|
|
break;
|
|
}
|
|
|
|
p = br_multicast_new_port_group(cfg->p, &cfg->group, *pp, flags, NULL,
|
|
MCAST_INCLUDE, cfg->rt_protocol, extack);
|
|
if (unlikely(!p))
|
|
return -ENOMEM;
|
|
|
|
rcu_assign_pointer(*pp, p);
|
|
if (!(flags & MDB_PG_FLAGS_PERMANENT) && !cfg->src_entry)
|
|
mod_timer(&p->timer,
|
|
now + brmctx->multicast_membership_interval);
|
|
br_mdb_notify(cfg->br->dev, mp, p, RTM_NEWMDB);
|
|
|
|
/* All of (*, G) EXCLUDE ports need to be added to the new (S, G) for
|
|
* proper replication.
|
|
*/
|
|
if (br_multicast_should_handle_mode(brmctx, cfg->group.proto)) {
|
|
struct net_bridge_mdb_entry *star_mp;
|
|
struct br_ip star_group;
|
|
|
|
star_group = p->key.addr;
|
|
memset(&star_group.src, 0, sizeof(star_group.src));
|
|
star_mp = br_mdb_ip_get(cfg->br, &star_group);
|
|
if (star_mp)
|
|
br_multicast_sg_add_exclude_ports(star_mp, p);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int br_mdb_add_group_src_fwd(const struct br_mdb_config *cfg,
|
|
struct br_ip *src_ip,
|
|
struct net_bridge_mcast *brmctx,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net_bridge_mdb_entry *sgmp;
|
|
struct br_mdb_config sg_cfg;
|
|
struct br_ip sg_ip;
|
|
u8 flags = 0;
|
|
|
|
sg_ip = cfg->group;
|
|
sg_ip.src = src_ip->src;
|
|
sgmp = br_multicast_new_group(cfg->br, &sg_ip);
|
|
if (IS_ERR(sgmp)) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Failed to add (S, G) MDB entry");
|
|
return PTR_ERR(sgmp);
|
|
}
|
|
|
|
if (cfg->entry->state == MDB_PERMANENT)
|
|
flags |= MDB_PG_FLAGS_PERMANENT;
|
|
if (cfg->filter_mode == MCAST_EXCLUDE)
|
|
flags |= MDB_PG_FLAGS_BLOCKED;
|
|
|
|
memset(&sg_cfg, 0, sizeof(sg_cfg));
|
|
sg_cfg.br = cfg->br;
|
|
sg_cfg.p = cfg->p;
|
|
sg_cfg.entry = cfg->entry;
|
|
sg_cfg.group = sg_ip;
|
|
sg_cfg.src_entry = true;
|
|
sg_cfg.filter_mode = MCAST_INCLUDE;
|
|
sg_cfg.rt_protocol = cfg->rt_protocol;
|
|
sg_cfg.nlflags = cfg->nlflags;
|
|
return br_mdb_add_group_sg(&sg_cfg, sgmp, brmctx, flags, extack);
|
|
}
|
|
|
|
static int br_mdb_add_group_src(const struct br_mdb_config *cfg,
|
|
struct net_bridge_port_group *pg,
|
|
struct net_bridge_mcast *brmctx,
|
|
struct br_mdb_src_entry *src,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net_bridge_group_src *ent;
|
|
unsigned long now = jiffies;
|
|
int err;
|
|
|
|
ent = br_multicast_find_group_src(pg, &src->addr);
|
|
if (!ent) {
|
|
ent = br_multicast_new_group_src(pg, &src->addr);
|
|
if (!ent) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Failed to add new source entry");
|
|
return -ENOSPC;
|
|
}
|
|
} else if (!(cfg->nlflags & NLM_F_REPLACE)) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Source entry already exists");
|
|
return -EEXIST;
|
|
}
|
|
|
|
if (cfg->filter_mode == MCAST_INCLUDE &&
|
|
cfg->entry->state == MDB_TEMPORARY)
|
|
mod_timer(&ent->timer, now + br_multicast_gmi(brmctx));
|
|
else
|
|
del_timer(&ent->timer);
|
|
|
|
/* Install a (S, G) forwarding entry for the source. */
|
|
err = br_mdb_add_group_src_fwd(cfg, &src->addr, brmctx, extack);
|
|
if (err)
|
|
goto err_del_sg;
|
|
|
|
ent->flags = BR_SGRP_F_INSTALLED | BR_SGRP_F_USER_ADDED;
|
|
|
|
return 0;
|
|
|
|
err_del_sg:
|
|
__br_multicast_del_group_src(ent);
|
|
return err;
|
|
}
|
|
|
|
static void br_mdb_del_group_src(struct net_bridge_port_group *pg,
|
|
struct br_mdb_src_entry *src)
|
|
{
|
|
struct net_bridge_group_src *ent;
|
|
|
|
ent = br_multicast_find_group_src(pg, &src->addr);
|
|
if (WARN_ON_ONCE(!ent))
|
|
return;
|
|
br_multicast_del_group_src(ent, false);
|
|
}
|
|
|
|
static int br_mdb_add_group_srcs(const struct br_mdb_config *cfg,
|
|
struct net_bridge_port_group *pg,
|
|
struct net_bridge_mcast *brmctx,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
int i, err;
|
|
|
|
for (i = 0; i < cfg->num_src_entries; i++) {
|
|
err = br_mdb_add_group_src(cfg, pg, brmctx,
|
|
&cfg->src_entries[i], extack);
|
|
if (err)
|
|
goto err_del_group_srcs;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_del_group_srcs:
|
|
for (i--; i >= 0; i--)
|
|
br_mdb_del_group_src(pg, &cfg->src_entries[i]);
|
|
return err;
|
|
}
|
|
|
|
static int br_mdb_replace_group_srcs(const struct br_mdb_config *cfg,
|
|
struct net_bridge_port_group *pg,
|
|
struct net_bridge_mcast *brmctx,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net_bridge_group_src *ent;
|
|
struct hlist_node *tmp;
|
|
int err;
|
|
|
|
hlist_for_each_entry(ent, &pg->src_list, node)
|
|
ent->flags |= BR_SGRP_F_DELETE;
|
|
|
|
err = br_mdb_add_group_srcs(cfg, pg, brmctx, extack);
|
|
if (err)
|
|
goto err_clear_delete;
|
|
|
|
hlist_for_each_entry_safe(ent, tmp, &pg->src_list, node) {
|
|
if (ent->flags & BR_SGRP_F_DELETE)
|
|
br_multicast_del_group_src(ent, false);
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_clear_delete:
|
|
hlist_for_each_entry(ent, &pg->src_list, node)
|
|
ent->flags &= ~BR_SGRP_F_DELETE;
|
|
return err;
|
|
}
|
|
|
|
static int br_mdb_replace_group_star_g(const struct br_mdb_config *cfg,
|
|
struct net_bridge_mdb_entry *mp,
|
|
struct net_bridge_port_group *pg,
|
|
struct net_bridge_mcast *brmctx,
|
|
unsigned char flags,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
unsigned long now = jiffies;
|
|
int err;
|
|
|
|
err = br_mdb_replace_group_srcs(cfg, pg, brmctx, extack);
|
|
if (err)
|
|
return err;
|
|
|
|
pg->flags = flags;
|
|
pg->filter_mode = cfg->filter_mode;
|
|
pg->rt_protocol = cfg->rt_protocol;
|
|
if (!(flags & MDB_PG_FLAGS_PERMANENT) &&
|
|
cfg->filter_mode == MCAST_EXCLUDE)
|
|
mod_timer(&pg->timer,
|
|
now + brmctx->multicast_membership_interval);
|
|
else
|
|
del_timer(&pg->timer);
|
|
|
|
br_mdb_notify(cfg->br->dev, mp, pg, RTM_NEWMDB);
|
|
|
|
if (br_multicast_should_handle_mode(brmctx, cfg->group.proto))
|
|
br_multicast_star_g_handle_mode(pg, cfg->filter_mode);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int br_mdb_add_group_star_g(const struct br_mdb_config *cfg,
|
|
struct net_bridge_mdb_entry *mp,
|
|
struct net_bridge_mcast *brmctx,
|
|
unsigned char flags,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net_bridge_port_group __rcu **pp;
|
|
struct net_bridge_port_group *p;
|
|
unsigned long now = jiffies;
|
|
int err;
|
|
|
|
for (pp = &mp->ports;
|
|
(p = mlock_dereference(*pp, cfg->br)) != NULL;
|
|
pp = &p->next) {
|
|
if (p->key.port == cfg->p) {
|
|
if (!(cfg->nlflags & NLM_F_REPLACE)) {
|
|
NL_SET_ERR_MSG_MOD(extack, "(*, G) group is already joined by port");
|
|
return -EEXIST;
|
|
}
|
|
return br_mdb_replace_group_star_g(cfg, mp, p, brmctx,
|
|
flags, extack);
|
|
}
|
|
if ((unsigned long)p->key.port < (unsigned long)cfg->p)
|
|
break;
|
|
}
|
|
|
|
p = br_multicast_new_port_group(cfg->p, &cfg->group, *pp, flags, NULL,
|
|
cfg->filter_mode, cfg->rt_protocol,
|
|
extack);
|
|
if (unlikely(!p))
|
|
return -ENOMEM;
|
|
|
|
err = br_mdb_add_group_srcs(cfg, p, brmctx, extack);
|
|
if (err)
|
|
goto err_del_port_group;
|
|
|
|
rcu_assign_pointer(*pp, p);
|
|
if (!(flags & MDB_PG_FLAGS_PERMANENT) &&
|
|
cfg->filter_mode == MCAST_EXCLUDE)
|
|
mod_timer(&p->timer,
|
|
now + brmctx->multicast_membership_interval);
|
|
br_mdb_notify(cfg->br->dev, mp, p, RTM_NEWMDB);
|
|
/* If we are adding a new EXCLUDE port group (*, G), it needs to be
|
|
* also added to all (S, G) entries for proper replication.
|
|
*/
|
|
if (br_multicast_should_handle_mode(brmctx, cfg->group.proto) &&
|
|
cfg->filter_mode == MCAST_EXCLUDE)
|
|
br_multicast_star_g_handle_mode(p, MCAST_EXCLUDE);
|
|
|
|
return 0;
|
|
|
|
err_del_port_group:
|
|
br_multicast_del_port_group(p);
|
|
return err;
|
|
}
|
|
|
|
static int br_mdb_add_group(const struct br_mdb_config *cfg,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct br_mdb_entry *entry = cfg->entry;
|
|
struct net_bridge_port *port = cfg->p;
|
|
struct net_bridge_mdb_entry *mp;
|
|
struct net_bridge *br = cfg->br;
|
|
struct net_bridge_mcast *brmctx;
|
|
struct br_ip group = cfg->group;
|
|
unsigned char flags = 0;
|
|
|
|
brmctx = __br_mdb_choose_context(br, entry, extack);
|
|
if (!brmctx)
|
|
return -EINVAL;
|
|
|
|
mp = br_multicast_new_group(br, &group);
|
|
if (IS_ERR(mp))
|
|
return PTR_ERR(mp);
|
|
|
|
/* host join */
|
|
if (!port) {
|
|
if (mp->host_joined) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Group is already joined by host");
|
|
return -EEXIST;
|
|
}
|
|
|
|
br_multicast_host_join(brmctx, mp, false);
|
|
br_mdb_notify(br->dev, mp, NULL, RTM_NEWMDB);
|
|
|
|
return 0;
|
|
}
|
|
|
|
if (entry->state == MDB_PERMANENT)
|
|
flags |= MDB_PG_FLAGS_PERMANENT;
|
|
|
|
if (br_multicast_is_star_g(&group))
|
|
return br_mdb_add_group_star_g(cfg, mp, brmctx, flags, extack);
|
|
else
|
|
return br_mdb_add_group_sg(cfg, mp, brmctx, flags, extack);
|
|
}
|
|
|
|
static int __br_mdb_add(const struct br_mdb_config *cfg,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
int ret;
|
|
|
|
spin_lock_bh(&cfg->br->multicast_lock);
|
|
ret = br_mdb_add_group(cfg, extack);
|
|
spin_unlock_bh(&cfg->br->multicast_lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int br_mdb_config_src_entry_init(struct nlattr *src_entry,
|
|
struct br_mdb_src_entry *src,
|
|
__be16 proto,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct nlattr *tb[MDBE_SRCATTR_MAX + 1];
|
|
int err;
|
|
|
|
err = nla_parse_nested(tb, MDBE_SRCATTR_MAX, src_entry,
|
|
br_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 (!is_valid_mdb_source(tb[MDBE_SRCATTR_ADDRESS], proto, extack))
|
|
return -EINVAL;
|
|
|
|
src->addr.proto = proto;
|
|
nla_memcpy(&src->addr.src, tb[MDBE_SRCATTR_ADDRESS],
|
|
nla_len(tb[MDBE_SRCATTR_ADDRESS]));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int br_mdb_config_src_list_init(struct nlattr *src_list,
|
|
struct br_mdb_config *cfg,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct nlattr *src_entry;
|
|
int rem, err;
|
|
int i = 0;
|
|
|
|
nla_for_each_nested(src_entry, src_list, rem)
|
|
cfg->num_src_entries++;
|
|
|
|
if (cfg->num_src_entries >= PG_SRC_ENT_LIMIT) {
|
|
NL_SET_ERR_MSG_FMT_MOD(extack, "Exceeded maximum number of source entries (%u)",
|
|
PG_SRC_ENT_LIMIT - 1);
|
|
return -EINVAL;
|
|
}
|
|
|
|
cfg->src_entries = kcalloc(cfg->num_src_entries,
|
|
sizeof(struct br_mdb_src_entry), GFP_KERNEL);
|
|
if (!cfg->src_entries)
|
|
return -ENOMEM;
|
|
|
|
nla_for_each_nested(src_entry, src_list, rem) {
|
|
err = br_mdb_config_src_entry_init(src_entry,
|
|
&cfg->src_entries[i],
|
|
cfg->entry->addr.proto,
|
|
extack);
|
|
if (err)
|
|
goto err_src_entry_init;
|
|
i++;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_src_entry_init:
|
|
kfree(cfg->src_entries);
|
|
return err;
|
|
}
|
|
|
|
static void br_mdb_config_src_list_fini(struct br_mdb_config *cfg)
|
|
{
|
|
kfree(cfg->src_entries);
|
|
}
|
|
|
|
static int br_mdb_config_attrs_init(struct nlattr *set_attrs,
|
|
struct br_mdb_config *cfg,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct nlattr *mdb_attrs[MDBE_ATTR_MAX + 1];
|
|
int err;
|
|
|
|
err = nla_parse_nested(mdb_attrs, MDBE_ATTR_MAX, set_attrs,
|
|
br_mdbe_attrs_pol, extack);
|
|
if (err)
|
|
return err;
|
|
|
|
if (mdb_attrs[MDBE_ATTR_SOURCE] &&
|
|
!is_valid_mdb_source(mdb_attrs[MDBE_ATTR_SOURCE],
|
|
cfg->entry->addr.proto, extack))
|
|
return -EINVAL;
|
|
|
|
__mdb_entry_to_br_ip(cfg->entry, &cfg->group, mdb_attrs);
|
|
|
|
if (mdb_attrs[MDBE_ATTR_GROUP_MODE]) {
|
|
if (!cfg->p) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Filter mode cannot be set for host groups");
|
|
return -EINVAL;
|
|
}
|
|
if (!br_multicast_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(mdb_attrs[MDBE_ATTR_GROUP_MODE]);
|
|
} else {
|
|
cfg->filter_mode = MCAST_EXCLUDE;
|
|
}
|
|
|
|
if (mdb_attrs[MDBE_ATTR_SRC_LIST]) {
|
|
if (!cfg->p) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Source list cannot be set for host groups");
|
|
return -EINVAL;
|
|
}
|
|
if (!br_multicast_is_star_g(&cfg->group)) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Source list can only be set for (*, G) entries");
|
|
return -EINVAL;
|
|
}
|
|
if (!mdb_attrs[MDBE_ATTR_GROUP_MODE]) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Source list cannot be set without filter mode");
|
|
return -EINVAL;
|
|
}
|
|
err = br_mdb_config_src_list_init(mdb_attrs[MDBE_ATTR_SRC_LIST],
|
|
cfg, extack);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
if (!cfg->num_src_entries && cfg->filter_mode == MCAST_INCLUDE) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Cannot add (*, G) INCLUDE with an empty source list");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (mdb_attrs[MDBE_ATTR_RTPROT]) {
|
|
if (!cfg->p) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Protocol cannot be set for host groups");
|
|
return -EINVAL;
|
|
}
|
|
cfg->rt_protocol = nla_get_u8(mdb_attrs[MDBE_ATTR_RTPROT]);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int br_mdb_config_init(struct br_mdb_config *cfg, struct net_device *dev,
|
|
struct nlattr *tb[], u16 nlmsg_flags,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net *net = dev_net(dev);
|
|
|
|
memset(cfg, 0, sizeof(*cfg));
|
|
cfg->filter_mode = MCAST_EXCLUDE;
|
|
cfg->rt_protocol = RTPROT_STATIC;
|
|
cfg->nlflags = nlmsg_flags;
|
|
|
|
cfg->br = netdev_priv(dev);
|
|
|
|
if (!netif_running(cfg->br->dev)) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Bridge device is not running");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!br_opt_get(cfg->br, BROPT_MULTICAST_ENABLED)) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Bridge's multicast processing is disabled");
|
|
return -EINVAL;
|
|
}
|
|
|
|
cfg->entry = nla_data(tb[MDBA_SET_ENTRY]);
|
|
|
|
if (cfg->entry->ifindex != cfg->br->dev->ifindex) {
|
|
struct net_device *pdev;
|
|
|
|
pdev = __dev_get_by_index(net, cfg->entry->ifindex);
|
|
if (!pdev) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Port net device doesn't exist");
|
|
return -ENODEV;
|
|
}
|
|
|
|
cfg->p = br_port_get_rtnl(pdev);
|
|
if (!cfg->p) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Net device is not a bridge port");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (cfg->p->br != cfg->br) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Port belongs to a different bridge device");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
if (cfg->entry->addr.proto == htons(ETH_P_IP) &&
|
|
ipv4_is_zeronet(cfg->entry->addr.u.ip4)) {
|
|
NL_SET_ERR_MSG_MOD(extack, "IPv4 entry group address 0.0.0.0 is not allowed");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (tb[MDBA_SET_ENTRY_ATTRS])
|
|
return br_mdb_config_attrs_init(tb[MDBA_SET_ENTRY_ATTRS], cfg,
|
|
extack);
|
|
else
|
|
__mdb_entry_to_br_ip(cfg->entry, &cfg->group, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void br_mdb_config_fini(struct br_mdb_config *cfg)
|
|
{
|
|
br_mdb_config_src_list_fini(cfg);
|
|
}
|
|
|
|
int br_mdb_add(struct net_device *dev, struct nlattr *tb[], u16 nlmsg_flags,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net_bridge_vlan_group *vg;
|
|
struct net_bridge_vlan *v;
|
|
struct br_mdb_config cfg;
|
|
int err;
|
|
|
|
err = br_mdb_config_init(&cfg, dev, tb, nlmsg_flags, extack);
|
|
if (err)
|
|
return err;
|
|
|
|
err = -EINVAL;
|
|
/* host join errors which can happen before creating the group */
|
|
if (!cfg.p && !br_group_is_l2(&cfg.group)) {
|
|
/* don't allow any flags for host-joined IP groups */
|
|
if (cfg.entry->state) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Flags are not allowed for host groups");
|
|
goto out;
|
|
}
|
|
if (!br_multicast_is_star_g(&cfg.group)) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Groups with sources cannot be manually host joined");
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
if (br_group_is_l2(&cfg.group) && cfg.entry->state != MDB_PERMANENT) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Only permanent L2 entries allowed");
|
|
goto out;
|
|
}
|
|
|
|
if (cfg.p) {
|
|
if (cfg.p->state == BR_STATE_DISABLED && cfg.entry->state != MDB_PERMANENT) {
|
|
NL_SET_ERR_MSG_MOD(extack, "Port is in disabled state and entry is not permanent");
|
|
goto out;
|
|
}
|
|
vg = nbp_vlan_group(cfg.p);
|
|
} else {
|
|
vg = br_vlan_group(cfg.br);
|
|
}
|
|
|
|
/* If vlan filtering is enabled and VLAN is not specified
|
|
* install mdb entry on all vlans configured on the port.
|
|
*/
|
|
if (br_vlan_enabled(cfg.br->dev) && vg && cfg.entry->vid == 0) {
|
|
list_for_each_entry(v, &vg->vlan_list, vlist) {
|
|
cfg.entry->vid = v->vid;
|
|
cfg.group.vid = v->vid;
|
|
err = __br_mdb_add(&cfg, extack);
|
|
if (err)
|
|
break;
|
|
}
|
|
} else {
|
|
err = __br_mdb_add(&cfg, extack);
|
|
}
|
|
|
|
out:
|
|
br_mdb_config_fini(&cfg);
|
|
return err;
|
|
}
|
|
|
|
static int __br_mdb_del(const struct br_mdb_config *cfg)
|
|
{
|
|
struct br_mdb_entry *entry = cfg->entry;
|
|
struct net_bridge *br = cfg->br;
|
|
struct net_bridge_mdb_entry *mp;
|
|
struct net_bridge_port_group *p;
|
|
struct net_bridge_port_group __rcu **pp;
|
|
struct br_ip ip = cfg->group;
|
|
int err = -EINVAL;
|
|
|
|
spin_lock_bh(&br->multicast_lock);
|
|
mp = br_mdb_ip_get(br, &ip);
|
|
if (!mp)
|
|
goto unlock;
|
|
|
|
/* host leave */
|
|
if (entry->ifindex == mp->br->dev->ifindex && mp->host_joined) {
|
|
br_multicast_host_leave(mp, false);
|
|
err = 0;
|
|
br_mdb_notify(br->dev, mp, NULL, RTM_DELMDB);
|
|
if (!mp->ports && netif_running(br->dev))
|
|
mod_timer(&mp->timer, jiffies);
|
|
goto unlock;
|
|
}
|
|
|
|
for (pp = &mp->ports;
|
|
(p = mlock_dereference(*pp, br)) != NULL;
|
|
pp = &p->next) {
|
|
if (!p->key.port || p->key.port->dev->ifindex != entry->ifindex)
|
|
continue;
|
|
|
|
br_multicast_del_pg(mp, p, pp);
|
|
err = 0;
|
|
break;
|
|
}
|
|
|
|
unlock:
|
|
spin_unlock_bh(&br->multicast_lock);
|
|
return err;
|
|
}
|
|
|
|
int br_mdb_del(struct net_device *dev, struct nlattr *tb[],
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net_bridge_vlan_group *vg;
|
|
struct net_bridge_vlan *v;
|
|
struct br_mdb_config cfg;
|
|
int err;
|
|
|
|
err = br_mdb_config_init(&cfg, dev, tb, 0, extack);
|
|
if (err)
|
|
return err;
|
|
|
|
if (cfg.p)
|
|
vg = nbp_vlan_group(cfg.p);
|
|
else
|
|
vg = br_vlan_group(cfg.br);
|
|
|
|
/* If vlan filtering is enabled and VLAN is not specified
|
|
* delete mdb entry on all vlans configured on the port.
|
|
*/
|
|
if (br_vlan_enabled(cfg.br->dev) && vg && cfg.entry->vid == 0) {
|
|
list_for_each_entry(v, &vg->vlan_list, vlist) {
|
|
cfg.entry->vid = v->vid;
|
|
cfg.group.vid = v->vid;
|
|
err = __br_mdb_del(&cfg);
|
|
}
|
|
} else {
|
|
err = __br_mdb_del(&cfg);
|
|
}
|
|
|
|
br_mdb_config_fini(&cfg);
|
|
return err;
|
|
}
|