mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-24 17:47:38 +07:00
ae0be8de9a
Even if the NLA_F_NESTED flag was introduced more than 11 years ago, most netlink based interfaces (including recently added ones) are still not setting it in kernel generated messages. Without the flag, message parsers not aware of attribute semantics (e.g. wireshark dissector or libmnl's mnl_nlmsg_fprintf()) cannot recognize nested attributes and won't display the structure of their contents. Unfortunately we cannot just add the flag everywhere as there may be userspace applications which check nlattr::nla_type directly rather than through a helper masking out the flags. Therefore the patch renames nla_nest_start() to nla_nest_start_noflag() and introduces nla_nest_start() as a wrapper adding NLA_F_NESTED. The calls which add NLA_F_NESTED manually are rewritten to use nla_nest_start(). Except for changes in include/net/netlink.h, the patch was generated using this semantic patch: @@ expression E1, E2; @@ -nla_nest_start(E1, E2) +nla_nest_start_noflag(E1, E2) @@ expression E1, E2; @@ -nla_nest_start_noflag(E1, E2 | NLA_F_NESTED) +nla_nest_start(E1, E2) Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Acked-by: Jiri Pirko <jiri@mellanox.com> Acked-by: David Ahern <dsahern@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
787 lines
18 KiB
C
787 lines
18 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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}
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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 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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struct net_bridge_port *port;
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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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for (pp = &mp->ports; (p = rcu_dereference(*pp)) != NULL;
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pp = &p->next) {
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struct nlattr *nest_ent;
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struct br_mdb_entry e;
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port = p->port;
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if (!port)
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continue;
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memset(&e, 0, sizeof(e));
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e.ifindex = port->dev->ifindex;
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e.vid = p->addr.vid;
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__mdb_entry_fill_flags(&e, p->flags);
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if (p->addr.proto == htons(ETH_P_IP))
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e.addr.u.ip4 = p->addr.u.ip4;
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#if IS_ENABLED(CONFIG_IPV6)
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if (p->addr.proto == htons(ETH_P_IPV6))
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e.addr.u.ip6 = p->addr.u.ip6;
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#endif
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e.addr.proto = p->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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nla_nest_cancel(skb, nest2);
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err = -EMSGSIZE;
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goto out;
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}
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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(&p->timer))) {
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nla_nest_cancel(skb, nest_ent);
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nla_nest_cancel(skb, nest2);
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err = -EMSGSIZE;
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goto out;
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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, 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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|
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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,
|
|
struct net_device *dev,
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int ifindex, u32 pid,
|
|
u32 seq, int type, unsigned int flags)
|
|
{
|
|
struct br_port_msg *bpm;
|
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struct nlmsghdr *nlh;
|
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struct nlattr *nest;
|
|
|
|
nlh = nlmsg_put(skb, pid, seq, type, sizeof(*bpm), NLM_F_MULTI);
|
|
if (!nlh)
|
|
return -EMSGSIZE;
|
|
|
|
bpm = nlmsg_data(nlh);
|
|
memset(bpm, 0, sizeof(*bpm));
|
|
bpm->family = AF_BRIDGE;
|
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bpm->ifindex = dev->ifindex;
|
|
nest = nla_nest_start_noflag(skb, MDBA_ROUTER);
|
|
if (!nest)
|
|
goto cancel;
|
|
|
|
if (nla_put_u32(skb, MDBA_ROUTER_PORT, ifindex))
|
|
goto end;
|
|
|
|
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));
|
|
}
|
|
|
|
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(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;
|
|
}
|
|
|
|
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;
|
|
int ret;
|
|
|
|
if (!netif_running(br->dev) || !br_opt_get(br, BROPT_MULTICAST_ENABLED))
|
|
return -EINVAL;
|
|
|
|
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_device *dev, *pdev;
|
|
struct br_mdb_entry *entry;
|
|
struct net_bridge_port *p;
|
|
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 vlan filtering is enabled and VLAN is not specified
|
|
* install mdb entry on all vlans configured on the port.
|
|
*/
|
|
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);
|
|
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;
|
|
|
|
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_device *dev, *pdev;
|
|
struct br_mdb_entry *entry;
|
|
struct net_bridge_port *p;
|
|
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 vlan filtering is enabled and VLAN is not specified
|
|
* delete mdb entry on all vlans configured on the port.
|
|
*/
|
|
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);
|
|
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);
|
|
}
|