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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
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![David S. Miller](/assets/img/avatar_default.png)
Minor overlapping changes in the btusb and ixgbe drivers. Signed-off-by: David S. Miller <davem@davemloft.net>
847 lines
19 KiB
C
847 lines
19 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 int br_rports_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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struct net_bridge *br = netdev_priv(dev);
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struct net_bridge_port *p;
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struct nlattr *nest, *port_nest;
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if (!br->multicast_router || hlist_empty(&br->router_list))
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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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hlist_for_each_entry_rcu(p, &br->router_list, rlist) {
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if (!p)
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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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br_timer_value(&p->multicast_router_timer)) ||
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nla_put_u8(skb, MDBA_ROUTER_PATTR_TYPE,
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p->multicast_router)) {
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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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}
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static void __mdb_entry_to_br_ip(struct br_mdb_entry *entry, struct br_ip *ip)
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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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if (ip->proto == htons(ETH_P_IP))
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ip->u.ip4 = entry->addr.u.ip4;
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#if IS_ENABLED(CONFIG_IPV6)
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else
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ip->u.ip6 = entry->addr.u.ip6;
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#endif
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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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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->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.u.ip4;
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#if IS_ENABLED(CONFIG_IPV6)
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if (mp->addr.proto == htons(ETH_P_IPV6))
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e.addr.u.ip6 = mp->addr.u.ip6;
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#endif
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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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nla_nest_cancel(skb, nest_ent);
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return -EMSGSIZE;
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}
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nla_nest_end(skb, nest_ent);
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return 0;
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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;
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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 (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->port)
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continue;
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err = __mdb_fill_info(skb, mp, p);
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if (err) {
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nla_nest_cancel(skb, nest2);
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goto out;
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}
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}
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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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nla_nest_end(skb, nest);
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return err;
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}
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static int br_mdb_valid_dump_req(const struct nlmsghdr *nlh,
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struct netlink_ext_ack *extack)
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{
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struct br_port_msg *bpm;
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if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*bpm))) {
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NL_SET_ERR_MSG_MOD(extack, "Invalid header for mdb dump request");
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return -EINVAL;
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}
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bpm = nlmsg_data(nlh);
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if (bpm->ifindex) {
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NL_SET_ERR_MSG_MOD(extack, "Filtering by device index is not supported for mdb dump request");
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return -EINVAL;
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}
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if (nlmsg_attrlen(nlh, sizeof(*bpm))) {
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NL_SET_ERR_MSG(extack, "Invalid data after header in mdb dump request");
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return -EINVAL;
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}
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return 0;
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}
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static int br_mdb_dump(struct sk_buff *skb, struct netlink_callback *cb)
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{
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struct net_device *dev;
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struct net *net = sock_net(skb->sk);
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struct nlmsghdr *nlh = NULL;
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int idx = 0, s_idx;
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if (cb->strict_check) {
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int err = br_mdb_valid_dump_req(cb->nlh, cb->extack);
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if (err < 0)
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return err;
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}
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s_idx = cb->args[0];
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rcu_read_lock();
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cb->seq = net->dev_base_seq;
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for_each_netdev_rcu(net, dev) {
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if (dev->priv_flags & IFF_EBRIDGE) {
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struct br_port_msg *bpm;
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if (idx < s_idx)
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goto skip;
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nlh = nlmsg_put(skb, NETLINK_CB(cb->skb).portid,
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cb->nlh->nlmsg_seq, RTM_GETMDB,
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sizeof(*bpm), NLM_F_MULTI);
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if (nlh == NULL)
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break;
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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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if (br_mdb_fill_info(skb, cb, dev) < 0)
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goto out;
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if (br_rports_fill_info(skb, cb, dev) < 0)
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goto out;
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cb->args[1] = 0;
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nlmsg_end(skb, nlh);
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skip:
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idx++;
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}
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}
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out:
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if (nlh)
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nlmsg_end(skb, nlh);
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rcu_read_unlock();
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cb->args[0] = idx;
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return skb->len;
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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 br_mdb_entry *entry, u32 pid,
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u32 seq, int type, unsigned int flags)
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{
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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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nlh = nlmsg_put(skb, pid, seq, 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);
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if (nest == NULL)
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goto cancel;
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nest2 = nla_nest_start_noflag(skb, MDBA_MDB_ENTRY);
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if (nest2 == NULL)
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goto end;
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if (nla_put(skb, MDBA_MDB_ENTRY_INFO, sizeof(*entry), entry))
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goto end;
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nla_nest_end(skb, nest2);
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nla_nest_end(skb, nest);
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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:
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nlmsg_cancel(skb, nlh);
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return -EMSGSIZE;
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}
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static inline size_t rtnl_mdb_nlmsg_size(void)
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{
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return NLMSG_ALIGN(sizeof(struct br_port_msg))
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+ nla_total_size(sizeof(struct br_mdb_entry));
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}
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struct br_mdb_complete_info {
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struct net_bridge_port *port;
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struct br_ip ip;
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};
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static void br_mdb_complete(struct net_device *dev, int err, void *priv)
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{
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struct br_mdb_complete_info *data = priv;
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struct net_bridge_port_group __rcu **pp;
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struct net_bridge_port_group *p;
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struct net_bridge_mdb_entry *mp;
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struct net_bridge_port *port = data->port;
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struct net_bridge *br = port->br;
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if (err)
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goto err;
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spin_lock_bh(&br->multicast_lock);
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mp = br_mdb_ip_get(br, &data->ip);
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if (!mp)
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goto out;
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for (pp = &mp->ports; (p = mlock_dereference(*pp, br)) != NULL;
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pp = &p->next) {
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if (p->port != port)
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continue;
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p->flags |= MDB_PG_FLAGS_OFFLOAD;
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}
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out:
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spin_unlock_bh(&br->multicast_lock);
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err:
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kfree(priv);
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}
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static void br_mdb_switchdev_host_port(struct net_device *dev,
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struct net_device *lower_dev,
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struct br_mdb_entry *entry, int type)
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{
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struct switchdev_obj_port_mdb mdb = {
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.obj = {
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.id = SWITCHDEV_OBJ_ID_HOST_MDB,
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.flags = SWITCHDEV_F_DEFER,
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},
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.vid = entry->vid,
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};
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if (entry->addr.proto == htons(ETH_P_IP))
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ip_eth_mc_map(entry->addr.u.ip4, mdb.addr);
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#if IS_ENABLED(CONFIG_IPV6)
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else
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ipv6_eth_mc_map(&entry->addr.u.ip6, mdb.addr);
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#endif
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mdb.obj.orig_dev = dev;
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switch (type) {
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case RTM_NEWMDB:
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switchdev_port_obj_add(lower_dev, &mdb.obj, NULL);
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break;
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case RTM_DELMDB:
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switchdev_port_obj_del(lower_dev, &mdb.obj);
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break;
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}
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}
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static void br_mdb_switchdev_host(struct net_device *dev,
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struct br_mdb_entry *entry, int type)
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{
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struct net_device *lower_dev;
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struct list_head *iter;
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netdev_for_each_lower_dev(dev, lower_dev, iter)
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br_mdb_switchdev_host_port(dev, lower_dev, entry, type);
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}
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static void __br_mdb_notify(struct net_device *dev, struct net_bridge_port *p,
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struct br_mdb_entry *entry, int type)
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{
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struct br_mdb_complete_info *complete_info;
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struct switchdev_obj_port_mdb mdb = {
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.obj = {
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.id = SWITCHDEV_OBJ_ID_PORT_MDB,
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.flags = SWITCHDEV_F_DEFER,
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},
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.vid = entry->vid,
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};
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struct net_device *port_dev;
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struct net *net = dev_net(dev);
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struct sk_buff *skb;
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int err = -ENOBUFS;
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port_dev = __dev_get_by_index(net, entry->ifindex);
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if (entry->addr.proto == htons(ETH_P_IP))
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ip_eth_mc_map(entry->addr.u.ip4, mdb.addr);
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#if IS_ENABLED(CONFIG_IPV6)
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else
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ipv6_eth_mc_map(&entry->addr.u.ip6, mdb.addr);
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#endif
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mdb.obj.orig_dev = port_dev;
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if (p && port_dev && type == RTM_NEWMDB) {
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complete_info = kmalloc(sizeof(*complete_info), GFP_ATOMIC);
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if (complete_info) {
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complete_info->port = p;
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__mdb_entry_to_br_ip(entry, &complete_info->ip);
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mdb.obj.complete_priv = complete_info;
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mdb.obj.complete = br_mdb_complete;
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if (switchdev_port_obj_add(port_dev, &mdb.obj, NULL))
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kfree(complete_info);
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}
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} else if (p && port_dev && type == RTM_DELMDB) {
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switchdev_port_obj_del(port_dev, &mdb.obj);
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}
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if (!p)
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br_mdb_switchdev_host(dev, entry, type);
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skb = nlmsg_new(rtnl_mdb_nlmsg_size(), GFP_ATOMIC);
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if (!skb)
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goto errout;
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err = nlmsg_populate_mdb_fill(skb, dev, entry, 0, 0, type, NTF_SELF);
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if (err < 0) {
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kfree_skb(skb);
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goto errout;
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}
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rtnl_notify(skb, net, 0, RTNLGRP_MDB, NULL, GFP_ATOMIC);
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return;
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errout:
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rtnl_set_sk_err(net, RTNLGRP_MDB, err);
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}
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void br_mdb_notify(struct net_device *dev, struct net_bridge_port *port,
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struct br_ip *group, int type, u8 flags)
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{
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struct br_mdb_entry entry;
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memset(&entry, 0, sizeof(entry));
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if (port)
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entry.ifindex = port->dev->ifindex;
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else
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entry.ifindex = dev->ifindex;
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entry.addr.proto = group->proto;
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entry.addr.u.ip4 = group->u.ip4;
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#if IS_ENABLED(CONFIG_IPV6)
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entry.addr.u.ip6 = group->u.ip6;
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#endif
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entry.vid = group->vid;
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__mdb_entry_fill_flags(&entry, flags);
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__br_mdb_notify(dev, port, &entry, type);
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}
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static int nlmsg_populate_rtr_fill(struct sk_buff *skb,
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struct net_device *dev,
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int ifindex, u32 pid,
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u32 seq, int type, unsigned int flags)
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{
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struct br_port_msg *bpm;
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struct nlmsghdr *nlh;
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struct nlattr *nest;
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nlh = nlmsg_put(skb, pid, seq, 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_ROUTER);
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if (!nest)
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goto cancel;
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if (nla_put_u32(skb, MDBA_ROUTER_PORT, ifindex))
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goto end;
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nla_nest_end(skb, nest);
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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:
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nlmsg_cancel(skb, nlh);
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return -EMSGSIZE;
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}
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static inline size_t rtnl_rtr_nlmsg_size(void)
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{
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return NLMSG_ALIGN(sizeof(struct br_port_msg))
|
|
+ nla_total_size(sizeof(__u32));
|
|
}
|
|
|
|
void br_rtr_notify(struct net_device *dev, struct net_bridge_port *port,
|
|
int type)
|
|
{
|
|
struct net *net = dev_net(dev);
|
|
struct sk_buff *skb;
|
|
int err = -ENOBUFS;
|
|
int ifindex;
|
|
|
|
ifindex = port ? port->dev->ifindex : 0;
|
|
skb = nlmsg_new(rtnl_rtr_nlmsg_size(), GFP_ATOMIC);
|
|
if (!skb)
|
|
goto errout;
|
|
|
|
err = nlmsg_populate_rtr_fill(skb, dev, ifindex, 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 bool is_valid_mdb_entry(struct br_mdb_entry *entry)
|
|
{
|
|
if (entry->ifindex == 0)
|
|
return false;
|
|
|
|
if (entry->addr.proto == htons(ETH_P_IP)) {
|
|
if (!ipv4_is_multicast(entry->addr.u.ip4))
|
|
return false;
|
|
if (ipv4_is_local_multicast(entry->addr.u.ip4))
|
|
return false;
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
} else if (entry->addr.proto == htons(ETH_P_IPV6)) {
|
|
if (ipv6_addr_is_ll_all_nodes(&entry->addr.u.ip6))
|
|
return false;
|
|
#endif
|
|
} else
|
|
return false;
|
|
if (entry->state != MDB_PERMANENT && entry->state != MDB_TEMPORARY)
|
|
return false;
|
|
if (entry->vid >= VLAN_VID_MASK)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
static int br_mdb_parse(struct sk_buff *skb, struct nlmsghdr *nlh,
|
|
struct net_device **pdev, struct br_mdb_entry **pentry)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct br_mdb_entry *entry;
|
|
struct br_port_msg *bpm;
|
|
struct nlattr *tb[MDBA_SET_ENTRY_MAX+1];
|
|
struct net_device *dev;
|
|
int err;
|
|
|
|
err = nlmsg_parse_deprecated(nlh, sizeof(*bpm), tb,
|
|
MDBA_SET_ENTRY_MAX, NULL, NULL);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
bpm = nlmsg_data(nlh);
|
|
if (bpm->ifindex == 0) {
|
|
pr_info("PF_BRIDGE: br_mdb_parse() with invalid ifindex\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
dev = __dev_get_by_index(net, bpm->ifindex);
|
|
if (dev == NULL) {
|
|
pr_info("PF_BRIDGE: br_mdb_parse() with unknown ifindex\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
if (!(dev->priv_flags & IFF_EBRIDGE)) {
|
|
pr_info("PF_BRIDGE: br_mdb_parse() with non-bridge\n");
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
*pdev = dev;
|
|
|
|
if (!tb[MDBA_SET_ENTRY] ||
|
|
nla_len(tb[MDBA_SET_ENTRY]) != sizeof(struct br_mdb_entry)) {
|
|
pr_info("PF_BRIDGE: br_mdb_parse() with invalid attr\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
entry = nla_data(tb[MDBA_SET_ENTRY]);
|
|
if (!is_valid_mdb_entry(entry)) {
|
|
pr_info("PF_BRIDGE: br_mdb_parse() with invalid entry\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
*pentry = entry;
|
|
return 0;
|
|
}
|
|
|
|
static int br_mdb_add_group(struct net_bridge *br, struct net_bridge_port *port,
|
|
struct br_ip *group, unsigned char state)
|
|
{
|
|
struct net_bridge_mdb_entry *mp;
|
|
struct net_bridge_port_group *p;
|
|
struct net_bridge_port_group __rcu **pp;
|
|
unsigned long now = jiffies;
|
|
int err;
|
|
|
|
mp = br_mdb_ip_get(br, group);
|
|
if (!mp) {
|
|
mp = br_multicast_new_group(br, group);
|
|
err = PTR_ERR_OR_ZERO(mp);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
/* host join */
|
|
if (!port) {
|
|
/* don't allow any flags for host-joined groups */
|
|
if (state)
|
|
return -EINVAL;
|
|
if (mp->host_joined)
|
|
return -EEXIST;
|
|
|
|
br_multicast_host_join(mp, false);
|
|
|
|
return 0;
|
|
}
|
|
|
|
for (pp = &mp->ports;
|
|
(p = mlock_dereference(*pp, br)) != NULL;
|
|
pp = &p->next) {
|
|
if (p->port == port)
|
|
return -EEXIST;
|
|
if ((unsigned long)p->port < (unsigned long)port)
|
|
break;
|
|
}
|
|
|
|
p = br_multicast_new_port_group(port, group, *pp, state, NULL);
|
|
if (unlikely(!p))
|
|
return -ENOMEM;
|
|
rcu_assign_pointer(*pp, p);
|
|
if (state == MDB_TEMPORARY)
|
|
mod_timer(&p->timer, now + br->multicast_membership_interval);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __br_mdb_add(struct net *net, struct net_bridge *br,
|
|
struct br_mdb_entry *entry)
|
|
{
|
|
struct br_ip ip;
|
|
struct net_device *dev;
|
|
struct net_bridge_port *p = NULL;
|
|
int ret;
|
|
|
|
if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED))
|
|
return -EINVAL;
|
|
|
|
if (entry->ifindex != br->dev->ifindex) {
|
|
dev = __dev_get_by_index(net, entry->ifindex);
|
|
if (!dev)
|
|
return -ENODEV;
|
|
|
|
p = br_port_get_rtnl(dev);
|
|
if (!p || p->br != br || p->state == BR_STATE_DISABLED)
|
|
return -EINVAL;
|
|
}
|
|
|
|
__mdb_entry_to_br_ip(entry, &ip);
|
|
|
|
spin_lock_bh(&br->multicast_lock);
|
|
ret = br_mdb_add_group(br, p, &ip, entry->state);
|
|
spin_unlock_bh(&br->multicast_lock);
|
|
return ret;
|
|
}
|
|
|
|
static int br_mdb_add(struct sk_buff *skb, struct nlmsghdr *nlh,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct net_bridge_vlan_group *vg;
|
|
struct net_bridge_port *p = NULL;
|
|
struct net_device *dev, *pdev;
|
|
struct br_mdb_entry *entry;
|
|
struct net_bridge_vlan *v;
|
|
struct net_bridge *br;
|
|
int err;
|
|
|
|
err = br_mdb_parse(skb, nlh, &dev, &entry);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
br = netdev_priv(dev);
|
|
|
|
if (entry->ifindex != br->dev->ifindex) {
|
|
pdev = __dev_get_by_index(net, entry->ifindex);
|
|
if (!pdev)
|
|
return -ENODEV;
|
|
|
|
p = br_port_get_rtnl(pdev);
|
|
if (!p || p->br != br || p->state == BR_STATE_DISABLED)
|
|
return -EINVAL;
|
|
vg = nbp_vlan_group(p);
|
|
} else {
|
|
vg = br_vlan_group(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(br->dev) && vg && entry->vid == 0) {
|
|
list_for_each_entry(v, &vg->vlan_list, vlist) {
|
|
entry->vid = v->vid;
|
|
err = __br_mdb_add(net, br, entry);
|
|
if (err)
|
|
break;
|
|
__br_mdb_notify(dev, p, entry, RTM_NEWMDB);
|
|
}
|
|
} else {
|
|
err = __br_mdb_add(net, br, entry);
|
|
if (!err)
|
|
__br_mdb_notify(dev, p, entry, RTM_NEWMDB);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
static int __br_mdb_del(struct net_bridge *br, struct br_mdb_entry *entry)
|
|
{
|
|
struct net_bridge_mdb_entry *mp;
|
|
struct net_bridge_port_group *p;
|
|
struct net_bridge_port_group __rcu **pp;
|
|
struct br_ip ip;
|
|
int err = -EINVAL;
|
|
|
|
if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED))
|
|
return -EINVAL;
|
|
|
|
__mdb_entry_to_br_ip(entry, &ip);
|
|
|
|
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;
|
|
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->port || p->port->dev->ifindex != entry->ifindex)
|
|
continue;
|
|
|
|
if (p->port->state == BR_STATE_DISABLED)
|
|
goto unlock;
|
|
|
|
__mdb_entry_fill_flags(entry, p->flags);
|
|
rcu_assign_pointer(*pp, p->next);
|
|
hlist_del_init(&p->mglist);
|
|
del_timer(&p->timer);
|
|
kfree_rcu(p, rcu);
|
|
err = 0;
|
|
|
|
if (!mp->ports && !mp->host_joined &&
|
|
netif_running(br->dev))
|
|
mod_timer(&mp->timer, jiffies);
|
|
break;
|
|
}
|
|
|
|
unlock:
|
|
spin_unlock_bh(&br->multicast_lock);
|
|
return err;
|
|
}
|
|
|
|
static int br_mdb_del(struct sk_buff *skb, struct nlmsghdr *nlh,
|
|
struct netlink_ext_ack *extack)
|
|
{
|
|
struct net *net = sock_net(skb->sk);
|
|
struct net_bridge_vlan_group *vg;
|
|
struct net_bridge_port *p = NULL;
|
|
struct net_device *dev, *pdev;
|
|
struct br_mdb_entry *entry;
|
|
struct net_bridge_vlan *v;
|
|
struct net_bridge *br;
|
|
int err;
|
|
|
|
err = br_mdb_parse(skb, nlh, &dev, &entry);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
br = netdev_priv(dev);
|
|
|
|
if (entry->ifindex != br->dev->ifindex) {
|
|
pdev = __dev_get_by_index(net, entry->ifindex);
|
|
if (!pdev)
|
|
return -ENODEV;
|
|
|
|
p = br_port_get_rtnl(pdev);
|
|
if (!p || p->br != br || p->state == BR_STATE_DISABLED)
|
|
return -EINVAL;
|
|
vg = nbp_vlan_group(p);
|
|
} else {
|
|
vg = br_vlan_group(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(br->dev) && vg && entry->vid == 0) {
|
|
list_for_each_entry(v, &vg->vlan_list, vlist) {
|
|
entry->vid = v->vid;
|
|
err = __br_mdb_del(br, entry);
|
|
if (!err)
|
|
__br_mdb_notify(dev, p, entry, RTM_DELMDB);
|
|
}
|
|
} else {
|
|
err = __br_mdb_del(br, entry);
|
|
if (!err)
|
|
__br_mdb_notify(dev, p, entry, RTM_DELMDB);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
void br_mdb_init(void)
|
|
{
|
|
rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_GETMDB, NULL, br_mdb_dump, 0);
|
|
rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_NEWMDB, br_mdb_add, NULL, 0);
|
|
rtnl_register_module(THIS_MODULE, PF_BRIDGE, RTM_DELMDB, br_mdb_del, NULL, 0);
|
|
}
|
|
|
|
void br_mdb_uninit(void)
|
|
{
|
|
rtnl_unregister(PF_BRIDGE, RTM_GETMDB);
|
|
rtnl_unregister(PF_BRIDGE, RTM_NEWMDB);
|
|
rtnl_unregister(PF_BRIDGE, RTM_DELMDB);
|
|
}
|