forked from Minki/linux
ffa85b73c3
If link mtu is too big, mld_newpack() allocates high-order page. But most mld packets don't need high-order page. So, it might waste unnecessary pages. To avoid this, it makes mld_newpack() try to allocate order-0 page. Suggested-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: Taehee Yoo <ap420073@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
3211 lines
76 KiB
C
3211 lines
76 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Multicast support for IPv6
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* Linux INET6 implementation
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*
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* Authors:
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* Pedro Roque <roque@di.fc.ul.pt>
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*
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* Based on linux/ipv4/igmp.c and linux/ipv4/ip_sockglue.c
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*/
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/* Changes:
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*
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* yoshfuji : fix format of router-alert option
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* YOSHIFUJI Hideaki @USAGI:
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* Fixed source address for MLD message based on
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* <draft-ietf-magma-mld-source-05.txt>.
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* YOSHIFUJI Hideaki @USAGI:
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* - Ignore Queries for invalid addresses.
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* - MLD for link-local addresses.
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* David L Stevens <dlstevens@us.ibm.com>:
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* - MLDv2 support
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*/
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/types.h>
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#include <linux/string.h>
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#include <linux/socket.h>
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#include <linux/sockios.h>
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#include <linux/jiffies.h>
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#include <linux/net.h>
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <linux/netdevice.h>
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#include <linux/if_arp.h>
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#include <linux/route.h>
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#include <linux/init.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include <linux/pkt_sched.h>
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#include <net/mld.h>
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#include <linux/workqueue.h>
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#include <linux/netfilter.h>
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#include <linux/netfilter_ipv6.h>
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#include <net/net_namespace.h>
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#include <net/sock.h>
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#include <net/snmp.h>
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#include <net/ipv6.h>
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#include <net/protocol.h>
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#include <net/if_inet6.h>
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#include <net/ndisc.h>
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#include <net/addrconf.h>
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#include <net/ip6_route.h>
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#include <net/inet_common.h>
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#include <net/ip6_checksum.h>
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/* Ensure that we have struct in6_addr aligned on 32bit word. */
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static int __mld2_query_bugs[] __attribute__((__unused__)) = {
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BUILD_BUG_ON_ZERO(offsetof(struct mld2_query, mld2q_srcs) % 4),
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BUILD_BUG_ON_ZERO(offsetof(struct mld2_report, mld2r_grec) % 4),
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BUILD_BUG_ON_ZERO(offsetof(struct mld2_grec, grec_mca) % 4)
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};
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static struct workqueue_struct *mld_wq;
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static struct in6_addr mld2_all_mcr = MLD2_ALL_MCR_INIT;
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static void igmp6_join_group(struct ifmcaddr6 *ma);
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static void igmp6_leave_group(struct ifmcaddr6 *ma);
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static void mld_mca_work(struct work_struct *work);
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static void mld_ifc_event(struct inet6_dev *idev);
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static bool mld_in_v1_mode(const struct inet6_dev *idev);
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static int sf_setstate(struct ifmcaddr6 *pmc);
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static void sf_markstate(struct ifmcaddr6 *pmc);
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static void ip6_mc_clear_src(struct ifmcaddr6 *pmc);
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static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
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int sfmode, int sfcount, const struct in6_addr *psfsrc,
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int delta);
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static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
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int sfmode, int sfcount, const struct in6_addr *psfsrc,
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int delta);
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static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
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struct inet6_dev *idev);
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static int __ipv6_dev_mc_inc(struct net_device *dev,
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const struct in6_addr *addr, unsigned int mode);
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#define MLD_QRV_DEFAULT 2
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/* RFC3810, 9.2. Query Interval */
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#define MLD_QI_DEFAULT (125 * HZ)
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/* RFC3810, 9.3. Query Response Interval */
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#define MLD_QRI_DEFAULT (10 * HZ)
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/* RFC3810, 8.1 Query Version Distinctions */
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#define MLD_V1_QUERY_LEN 24
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#define MLD_V2_QUERY_LEN_MIN 28
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#define IPV6_MLD_MAX_MSF 64
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int sysctl_mld_max_msf __read_mostly = IPV6_MLD_MAX_MSF;
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int sysctl_mld_qrv __read_mostly = MLD_QRV_DEFAULT;
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/*
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* socket join on multicast group
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*/
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#define mc_dereference(e, idev) \
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rcu_dereference_protected(e, lockdep_is_held(&(idev)->mc_lock))
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#define sock_dereference(e, sk) \
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rcu_dereference_protected(e, lockdep_sock_is_held(sk))
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#define for_each_pmc_socklock(np, sk, pmc) \
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for (pmc = sock_dereference((np)->ipv6_mc_list, sk); \
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pmc; \
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pmc = sock_dereference(pmc->next, sk))
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#define for_each_pmc_rcu(np, pmc) \
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for (pmc = rcu_dereference((np)->ipv6_mc_list); \
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pmc; \
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pmc = rcu_dereference(pmc->next))
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#define for_each_psf_mclock(mc, psf) \
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for (psf = mc_dereference((mc)->mca_sources, mc->idev); \
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psf; \
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psf = mc_dereference(psf->sf_next, mc->idev))
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#define for_each_psf_rcu(mc, psf) \
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for (psf = rcu_dereference((mc)->mca_sources); \
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psf; \
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psf = rcu_dereference(psf->sf_next))
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#define for_each_psf_tomb(mc, psf) \
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for (psf = mc_dereference((mc)->mca_tomb, mc->idev); \
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psf; \
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psf = mc_dereference(psf->sf_next, mc->idev))
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#define for_each_mc_mclock(idev, mc) \
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for (mc = mc_dereference((idev)->mc_list, idev); \
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mc; \
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mc = mc_dereference(mc->next, idev))
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#define for_each_mc_rcu(idev, mc) \
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for (mc = rcu_dereference((idev)->mc_list); \
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mc; \
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mc = rcu_dereference(mc->next))
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#define for_each_mc_tomb(idev, mc) \
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for (mc = mc_dereference((idev)->mc_tomb, idev); \
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mc; \
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mc = mc_dereference(mc->next, idev))
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static int unsolicited_report_interval(struct inet6_dev *idev)
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{
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int iv;
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if (mld_in_v1_mode(idev))
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iv = idev->cnf.mldv1_unsolicited_report_interval;
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else
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iv = idev->cnf.mldv2_unsolicited_report_interval;
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return iv > 0 ? iv : 1;
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}
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static int __ipv6_sock_mc_join(struct sock *sk, int ifindex,
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const struct in6_addr *addr, unsigned int mode)
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{
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struct net_device *dev = NULL;
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struct ipv6_mc_socklist *mc_lst;
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struct ipv6_pinfo *np = inet6_sk(sk);
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struct net *net = sock_net(sk);
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int err;
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ASSERT_RTNL();
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if (!ipv6_addr_is_multicast(addr))
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return -EINVAL;
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for_each_pmc_socklock(np, sk, mc_lst) {
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if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
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ipv6_addr_equal(&mc_lst->addr, addr))
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return -EADDRINUSE;
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}
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mc_lst = sock_kmalloc(sk, sizeof(struct ipv6_mc_socklist), GFP_KERNEL);
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if (!mc_lst)
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return -ENOMEM;
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mc_lst->next = NULL;
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mc_lst->addr = *addr;
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if (ifindex == 0) {
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struct rt6_info *rt;
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rt = rt6_lookup(net, addr, NULL, 0, NULL, 0);
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if (rt) {
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dev = rt->dst.dev;
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ip6_rt_put(rt);
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}
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} else
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dev = __dev_get_by_index(net, ifindex);
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if (!dev) {
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sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
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return -ENODEV;
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}
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mc_lst->ifindex = dev->ifindex;
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mc_lst->sfmode = mode;
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RCU_INIT_POINTER(mc_lst->sflist, NULL);
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/*
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* now add/increase the group membership on the device
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*/
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err = __ipv6_dev_mc_inc(dev, addr, mode);
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if (err) {
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sock_kfree_s(sk, mc_lst, sizeof(*mc_lst));
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return err;
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}
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mc_lst->next = np->ipv6_mc_list;
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rcu_assign_pointer(np->ipv6_mc_list, mc_lst);
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return 0;
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}
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int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr)
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{
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return __ipv6_sock_mc_join(sk, ifindex, addr, MCAST_EXCLUDE);
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}
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EXPORT_SYMBOL(ipv6_sock_mc_join);
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int ipv6_sock_mc_join_ssm(struct sock *sk, int ifindex,
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const struct in6_addr *addr, unsigned int mode)
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{
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return __ipv6_sock_mc_join(sk, ifindex, addr, mode);
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}
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/*
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* socket leave on multicast group
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*/
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int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr)
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{
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struct ipv6_pinfo *np = inet6_sk(sk);
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struct ipv6_mc_socklist *mc_lst;
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struct ipv6_mc_socklist __rcu **lnk;
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struct net *net = sock_net(sk);
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ASSERT_RTNL();
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if (!ipv6_addr_is_multicast(addr))
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return -EINVAL;
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for (lnk = &np->ipv6_mc_list;
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(mc_lst = sock_dereference(*lnk, sk)) != NULL;
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lnk = &mc_lst->next) {
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if ((ifindex == 0 || mc_lst->ifindex == ifindex) &&
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ipv6_addr_equal(&mc_lst->addr, addr)) {
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struct net_device *dev;
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*lnk = mc_lst->next;
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dev = __dev_get_by_index(net, mc_lst->ifindex);
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if (dev) {
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struct inet6_dev *idev = __in6_dev_get(dev);
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ip6_mc_leave_src(sk, mc_lst, idev);
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if (idev)
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__ipv6_dev_mc_dec(idev, &mc_lst->addr);
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} else {
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ip6_mc_leave_src(sk, mc_lst, NULL);
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}
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atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
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kfree_rcu(mc_lst, rcu);
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return 0;
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}
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}
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return -EADDRNOTAVAIL;
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}
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EXPORT_SYMBOL(ipv6_sock_mc_drop);
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static struct inet6_dev *ip6_mc_find_dev_rtnl(struct net *net,
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const struct in6_addr *group,
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int ifindex)
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{
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struct net_device *dev = NULL;
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struct inet6_dev *idev = NULL;
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if (ifindex == 0) {
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struct rt6_info *rt = rt6_lookup(net, group, NULL, 0, NULL, 0);
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if (rt) {
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dev = rt->dst.dev;
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ip6_rt_put(rt);
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}
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} else {
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dev = __dev_get_by_index(net, ifindex);
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}
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if (!dev)
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return NULL;
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idev = __in6_dev_get(dev);
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if (!idev)
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return NULL;
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if (idev->dead)
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return NULL;
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return idev;
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}
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void __ipv6_sock_mc_close(struct sock *sk)
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{
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struct ipv6_pinfo *np = inet6_sk(sk);
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struct ipv6_mc_socklist *mc_lst;
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struct net *net = sock_net(sk);
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ASSERT_RTNL();
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while ((mc_lst = sock_dereference(np->ipv6_mc_list, sk)) != NULL) {
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struct net_device *dev;
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np->ipv6_mc_list = mc_lst->next;
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dev = __dev_get_by_index(net, mc_lst->ifindex);
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if (dev) {
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struct inet6_dev *idev = __in6_dev_get(dev);
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ip6_mc_leave_src(sk, mc_lst, idev);
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if (idev)
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__ipv6_dev_mc_dec(idev, &mc_lst->addr);
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} else {
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ip6_mc_leave_src(sk, mc_lst, NULL);
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}
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atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc);
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kfree_rcu(mc_lst, rcu);
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}
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}
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void ipv6_sock_mc_close(struct sock *sk)
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{
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struct ipv6_pinfo *np = inet6_sk(sk);
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if (!rcu_access_pointer(np->ipv6_mc_list))
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return;
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rtnl_lock();
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lock_sock(sk);
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__ipv6_sock_mc_close(sk);
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release_sock(sk);
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rtnl_unlock();
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}
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int ip6_mc_source(int add, int omode, struct sock *sk,
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struct group_source_req *pgsr)
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{
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struct in6_addr *source, *group;
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struct ipv6_mc_socklist *pmc;
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struct inet6_dev *idev;
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struct ipv6_pinfo *inet6 = inet6_sk(sk);
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struct ip6_sf_socklist *psl;
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struct net *net = sock_net(sk);
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int i, j, rv;
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int leavegroup = 0;
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int err;
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source = &((struct sockaddr_in6 *)&pgsr->gsr_source)->sin6_addr;
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group = &((struct sockaddr_in6 *)&pgsr->gsr_group)->sin6_addr;
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if (!ipv6_addr_is_multicast(group))
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return -EINVAL;
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idev = ip6_mc_find_dev_rtnl(net, group, pgsr->gsr_interface);
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if (!idev)
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return -ENODEV;
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err = -EADDRNOTAVAIL;
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mutex_lock(&idev->mc_lock);
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for_each_pmc_socklock(inet6, sk, pmc) {
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if (pgsr->gsr_interface && pmc->ifindex != pgsr->gsr_interface)
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continue;
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if (ipv6_addr_equal(&pmc->addr, group))
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break;
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}
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if (!pmc) { /* must have a prior join */
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err = -EINVAL;
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goto done;
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}
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/* if a source filter was set, must be the same mode as before */
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if (rcu_access_pointer(pmc->sflist)) {
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if (pmc->sfmode != omode) {
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err = -EINVAL;
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goto done;
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}
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} else if (pmc->sfmode != omode) {
|
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/* allow mode switches for empty-set filters */
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ip6_mc_add_src(idev, group, omode, 0, NULL, 0);
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ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
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pmc->sfmode = omode;
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}
|
|
|
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psl = sock_dereference(pmc->sflist, sk);
|
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if (!add) {
|
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if (!psl)
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goto done; /* err = -EADDRNOTAVAIL */
|
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rv = !0;
|
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for (i = 0; i < psl->sl_count; i++) {
|
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rv = !ipv6_addr_equal(&psl->sl_addr[i], source);
|
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if (rv == 0)
|
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break;
|
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}
|
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if (rv) /* source not found */
|
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goto done; /* err = -EADDRNOTAVAIL */
|
|
|
|
/* special case - (INCLUDE, empty) == LEAVE_GROUP */
|
|
if (psl->sl_count == 1 && omode == MCAST_INCLUDE) {
|
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leavegroup = 1;
|
|
goto done;
|
|
}
|
|
|
|
/* update the interface filter */
|
|
ip6_mc_del_src(idev, group, omode, 1, source, 1);
|
|
|
|
for (j = i+1; j < psl->sl_count; j++)
|
|
psl->sl_addr[j-1] = psl->sl_addr[j];
|
|
psl->sl_count--;
|
|
err = 0;
|
|
goto done;
|
|
}
|
|
/* else, add a new source to the filter */
|
|
|
|
if (psl && psl->sl_count >= sysctl_mld_max_msf) {
|
|
err = -ENOBUFS;
|
|
goto done;
|
|
}
|
|
if (!psl || psl->sl_count == psl->sl_max) {
|
|
struct ip6_sf_socklist *newpsl;
|
|
int count = IP6_SFBLOCK;
|
|
|
|
if (psl)
|
|
count += psl->sl_max;
|
|
newpsl = sock_kmalloc(sk, IP6_SFLSIZE(count), GFP_KERNEL);
|
|
if (!newpsl) {
|
|
err = -ENOBUFS;
|
|
goto done;
|
|
}
|
|
newpsl->sl_max = count;
|
|
newpsl->sl_count = count - IP6_SFBLOCK;
|
|
if (psl) {
|
|
for (i = 0; i < psl->sl_count; i++)
|
|
newpsl->sl_addr[i] = psl->sl_addr[i];
|
|
atomic_sub(IP6_SFLSIZE(psl->sl_max), &sk->sk_omem_alloc);
|
|
kfree_rcu(psl, rcu);
|
|
}
|
|
psl = newpsl;
|
|
rcu_assign_pointer(pmc->sflist, psl);
|
|
}
|
|
rv = 1; /* > 0 for insert logic below if sl_count is 0 */
|
|
for (i = 0; i < psl->sl_count; i++) {
|
|
rv = !ipv6_addr_equal(&psl->sl_addr[i], source);
|
|
if (rv == 0) /* There is an error in the address. */
|
|
goto done;
|
|
}
|
|
for (j = psl->sl_count-1; j >= i; j--)
|
|
psl->sl_addr[j+1] = psl->sl_addr[j];
|
|
psl->sl_addr[i] = *source;
|
|
psl->sl_count++;
|
|
err = 0;
|
|
/* update the interface list */
|
|
ip6_mc_add_src(idev, group, omode, 1, source, 1);
|
|
done:
|
|
mutex_unlock(&idev->mc_lock);
|
|
if (leavegroup)
|
|
err = ipv6_sock_mc_drop(sk, pgsr->gsr_interface, group);
|
|
return err;
|
|
}
|
|
|
|
int ip6_mc_msfilter(struct sock *sk, struct group_filter *gsf,
|
|
struct sockaddr_storage *list)
|
|
{
|
|
const struct in6_addr *group;
|
|
struct ipv6_mc_socklist *pmc;
|
|
struct inet6_dev *idev;
|
|
struct ipv6_pinfo *inet6 = inet6_sk(sk);
|
|
struct ip6_sf_socklist *newpsl, *psl;
|
|
struct net *net = sock_net(sk);
|
|
int leavegroup = 0;
|
|
int i, err;
|
|
|
|
group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
|
|
|
|
if (!ipv6_addr_is_multicast(group))
|
|
return -EINVAL;
|
|
if (gsf->gf_fmode != MCAST_INCLUDE &&
|
|
gsf->gf_fmode != MCAST_EXCLUDE)
|
|
return -EINVAL;
|
|
|
|
idev = ip6_mc_find_dev_rtnl(net, group, gsf->gf_interface);
|
|
if (!idev)
|
|
return -ENODEV;
|
|
|
|
err = 0;
|
|
|
|
if (gsf->gf_fmode == MCAST_INCLUDE && gsf->gf_numsrc == 0) {
|
|
leavegroup = 1;
|
|
goto done;
|
|
}
|
|
|
|
for_each_pmc_socklock(inet6, sk, pmc) {
|
|
if (pmc->ifindex != gsf->gf_interface)
|
|
continue;
|
|
if (ipv6_addr_equal(&pmc->addr, group))
|
|
break;
|
|
}
|
|
if (!pmc) { /* must have a prior join */
|
|
err = -EINVAL;
|
|
goto done;
|
|
}
|
|
if (gsf->gf_numsrc) {
|
|
newpsl = sock_kmalloc(sk, IP6_SFLSIZE(gsf->gf_numsrc),
|
|
GFP_KERNEL);
|
|
if (!newpsl) {
|
|
err = -ENOBUFS;
|
|
goto done;
|
|
}
|
|
newpsl->sl_max = newpsl->sl_count = gsf->gf_numsrc;
|
|
for (i = 0; i < newpsl->sl_count; ++i, ++list) {
|
|
struct sockaddr_in6 *psin6;
|
|
|
|
psin6 = (struct sockaddr_in6 *)list;
|
|
newpsl->sl_addr[i] = psin6->sin6_addr;
|
|
}
|
|
mutex_lock(&idev->mc_lock);
|
|
err = ip6_mc_add_src(idev, group, gsf->gf_fmode,
|
|
newpsl->sl_count, newpsl->sl_addr, 0);
|
|
if (err) {
|
|
mutex_unlock(&idev->mc_lock);
|
|
sock_kfree_s(sk, newpsl, IP6_SFLSIZE(newpsl->sl_max));
|
|
goto done;
|
|
}
|
|
mutex_unlock(&idev->mc_lock);
|
|
} else {
|
|
newpsl = NULL;
|
|
mutex_lock(&idev->mc_lock);
|
|
ip6_mc_add_src(idev, group, gsf->gf_fmode, 0, NULL, 0);
|
|
mutex_unlock(&idev->mc_lock);
|
|
}
|
|
|
|
mutex_lock(&idev->mc_lock);
|
|
psl = sock_dereference(pmc->sflist, sk);
|
|
if (psl) {
|
|
ip6_mc_del_src(idev, group, pmc->sfmode,
|
|
psl->sl_count, psl->sl_addr, 0);
|
|
atomic_sub(IP6_SFLSIZE(psl->sl_max), &sk->sk_omem_alloc);
|
|
kfree_rcu(psl, rcu);
|
|
} else {
|
|
ip6_mc_del_src(idev, group, pmc->sfmode, 0, NULL, 0);
|
|
}
|
|
mutex_unlock(&idev->mc_lock);
|
|
rcu_assign_pointer(pmc->sflist, newpsl);
|
|
pmc->sfmode = gsf->gf_fmode;
|
|
err = 0;
|
|
done:
|
|
if (leavegroup)
|
|
err = ipv6_sock_mc_drop(sk, gsf->gf_interface, group);
|
|
return err;
|
|
}
|
|
|
|
int ip6_mc_msfget(struct sock *sk, struct group_filter *gsf,
|
|
struct sockaddr_storage __user *p)
|
|
{
|
|
struct ipv6_pinfo *inet6 = inet6_sk(sk);
|
|
const struct in6_addr *group;
|
|
struct ipv6_mc_socklist *pmc;
|
|
struct ip6_sf_socklist *psl;
|
|
int i, count, copycount;
|
|
|
|
group = &((struct sockaddr_in6 *)&gsf->gf_group)->sin6_addr;
|
|
|
|
if (!ipv6_addr_is_multicast(group))
|
|
return -EINVAL;
|
|
|
|
/* changes to the ipv6_mc_list require the socket lock and
|
|
* rtnl lock. We have the socket lock, so reading the list is safe.
|
|
*/
|
|
|
|
for_each_pmc_socklock(inet6, sk, pmc) {
|
|
if (pmc->ifindex != gsf->gf_interface)
|
|
continue;
|
|
if (ipv6_addr_equal(group, &pmc->addr))
|
|
break;
|
|
}
|
|
if (!pmc) /* must have a prior join */
|
|
return -EADDRNOTAVAIL;
|
|
|
|
gsf->gf_fmode = pmc->sfmode;
|
|
psl = sock_dereference(pmc->sflist, sk);
|
|
count = psl ? psl->sl_count : 0;
|
|
|
|
copycount = count < gsf->gf_numsrc ? count : gsf->gf_numsrc;
|
|
gsf->gf_numsrc = count;
|
|
|
|
for (i = 0; i < copycount; i++, p++) {
|
|
struct sockaddr_in6 *psin6;
|
|
struct sockaddr_storage ss;
|
|
|
|
psin6 = (struct sockaddr_in6 *)&ss;
|
|
memset(&ss, 0, sizeof(ss));
|
|
psin6->sin6_family = AF_INET6;
|
|
psin6->sin6_addr = psl->sl_addr[i];
|
|
if (copy_to_user(p, &ss, sizeof(ss)))
|
|
return -EFAULT;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
bool inet6_mc_check(struct sock *sk, const struct in6_addr *mc_addr,
|
|
const struct in6_addr *src_addr)
|
|
{
|
|
struct ipv6_pinfo *np = inet6_sk(sk);
|
|
struct ipv6_mc_socklist *mc;
|
|
struct ip6_sf_socklist *psl;
|
|
bool rv = true;
|
|
|
|
rcu_read_lock();
|
|
for_each_pmc_rcu(np, mc) {
|
|
if (ipv6_addr_equal(&mc->addr, mc_addr))
|
|
break;
|
|
}
|
|
if (!mc) {
|
|
rcu_read_unlock();
|
|
return np->mc_all;
|
|
}
|
|
psl = rcu_dereference(mc->sflist);
|
|
if (!psl) {
|
|
rv = mc->sfmode == MCAST_EXCLUDE;
|
|
} else {
|
|
int i;
|
|
|
|
for (i = 0; i < psl->sl_count; i++) {
|
|
if (ipv6_addr_equal(&psl->sl_addr[i], src_addr))
|
|
break;
|
|
}
|
|
if (mc->sfmode == MCAST_INCLUDE && i >= psl->sl_count)
|
|
rv = false;
|
|
if (mc->sfmode == MCAST_EXCLUDE && i < psl->sl_count)
|
|
rv = false;
|
|
}
|
|
rcu_read_unlock();
|
|
|
|
return rv;
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static void igmp6_group_added(struct ifmcaddr6 *mc)
|
|
{
|
|
struct net_device *dev = mc->idev->dev;
|
|
char buf[MAX_ADDR_LEN];
|
|
|
|
if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) <
|
|
IPV6_ADDR_SCOPE_LINKLOCAL)
|
|
return;
|
|
|
|
if (!(mc->mca_flags&MAF_LOADED)) {
|
|
mc->mca_flags |= MAF_LOADED;
|
|
if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
|
|
dev_mc_add(dev, buf);
|
|
}
|
|
|
|
if (!(dev->flags & IFF_UP) || (mc->mca_flags & MAF_NOREPORT))
|
|
return;
|
|
|
|
if (mld_in_v1_mode(mc->idev)) {
|
|
igmp6_join_group(mc);
|
|
return;
|
|
}
|
|
/* else v2 */
|
|
|
|
/* Based on RFC3810 6.1, for newly added INCLUDE SSM, we
|
|
* should not send filter-mode change record as the mode
|
|
* should be from IN() to IN(A).
|
|
*/
|
|
if (mc->mca_sfmode == MCAST_EXCLUDE)
|
|
mc->mca_crcount = mc->idev->mc_qrv;
|
|
|
|
mld_ifc_event(mc->idev);
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static void igmp6_group_dropped(struct ifmcaddr6 *mc)
|
|
{
|
|
struct net_device *dev = mc->idev->dev;
|
|
char buf[MAX_ADDR_LEN];
|
|
|
|
if (IPV6_ADDR_MC_SCOPE(&mc->mca_addr) <
|
|
IPV6_ADDR_SCOPE_LINKLOCAL)
|
|
return;
|
|
|
|
if (mc->mca_flags&MAF_LOADED) {
|
|
mc->mca_flags &= ~MAF_LOADED;
|
|
if (ndisc_mc_map(&mc->mca_addr, buf, dev, 0) == 0)
|
|
dev_mc_del(dev, buf);
|
|
}
|
|
|
|
if (mc->mca_flags & MAF_NOREPORT)
|
|
return;
|
|
|
|
if (!mc->idev->dead)
|
|
igmp6_leave_group(mc);
|
|
|
|
if (cancel_delayed_work(&mc->mca_work))
|
|
refcount_dec(&mc->mca_refcnt);
|
|
}
|
|
|
|
/*
|
|
* deleted ifmcaddr6 manipulation
|
|
* called with mc_lock
|
|
*/
|
|
static void mld_add_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
|
|
{
|
|
struct ifmcaddr6 *pmc;
|
|
|
|
/* this is an "ifmcaddr6" for convenience; only the fields below
|
|
* are actually used. In particular, the refcnt and users are not
|
|
* used for management of the delete list. Using the same structure
|
|
* for deleted items allows change reports to use common code with
|
|
* non-deleted or query-response MCA's.
|
|
*/
|
|
pmc = kzalloc(sizeof(*pmc), GFP_KERNEL);
|
|
if (!pmc)
|
|
return;
|
|
|
|
pmc->idev = im->idev;
|
|
in6_dev_hold(idev);
|
|
pmc->mca_addr = im->mca_addr;
|
|
pmc->mca_crcount = idev->mc_qrv;
|
|
pmc->mca_sfmode = im->mca_sfmode;
|
|
if (pmc->mca_sfmode == MCAST_INCLUDE) {
|
|
struct ip6_sf_list *psf;
|
|
|
|
rcu_assign_pointer(pmc->mca_tomb,
|
|
mc_dereference(im->mca_tomb, idev));
|
|
rcu_assign_pointer(pmc->mca_sources,
|
|
mc_dereference(im->mca_sources, idev));
|
|
RCU_INIT_POINTER(im->mca_tomb, NULL);
|
|
RCU_INIT_POINTER(im->mca_sources, NULL);
|
|
|
|
for_each_psf_mclock(pmc, psf)
|
|
psf->sf_crcount = pmc->mca_crcount;
|
|
}
|
|
|
|
rcu_assign_pointer(pmc->next, idev->mc_tomb);
|
|
rcu_assign_pointer(idev->mc_tomb, pmc);
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static void mld_del_delrec(struct inet6_dev *idev, struct ifmcaddr6 *im)
|
|
{
|
|
struct ip6_sf_list *psf, *sources, *tomb;
|
|
struct in6_addr *pmca = &im->mca_addr;
|
|
struct ifmcaddr6 *pmc, *pmc_prev;
|
|
|
|
pmc_prev = NULL;
|
|
for_each_mc_tomb(idev, pmc) {
|
|
if (ipv6_addr_equal(&pmc->mca_addr, pmca))
|
|
break;
|
|
pmc_prev = pmc;
|
|
}
|
|
if (pmc) {
|
|
if (pmc_prev)
|
|
rcu_assign_pointer(pmc_prev->next, pmc->next);
|
|
else
|
|
rcu_assign_pointer(idev->mc_tomb, pmc->next);
|
|
}
|
|
|
|
if (pmc) {
|
|
im->idev = pmc->idev;
|
|
if (im->mca_sfmode == MCAST_INCLUDE) {
|
|
tomb = rcu_replace_pointer(im->mca_tomb,
|
|
mc_dereference(pmc->mca_tomb, pmc->idev),
|
|
lockdep_is_held(&im->idev->mc_lock));
|
|
rcu_assign_pointer(pmc->mca_tomb, tomb);
|
|
|
|
sources = rcu_replace_pointer(im->mca_sources,
|
|
mc_dereference(pmc->mca_sources, pmc->idev),
|
|
lockdep_is_held(&im->idev->mc_lock));
|
|
rcu_assign_pointer(pmc->mca_sources, sources);
|
|
for_each_psf_mclock(im, psf)
|
|
psf->sf_crcount = idev->mc_qrv;
|
|
} else {
|
|
im->mca_crcount = idev->mc_qrv;
|
|
}
|
|
in6_dev_put(pmc->idev);
|
|
ip6_mc_clear_src(pmc);
|
|
kfree_rcu(pmc, rcu);
|
|
}
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static void mld_clear_delrec(struct inet6_dev *idev)
|
|
{
|
|
struct ifmcaddr6 *pmc, *nextpmc;
|
|
|
|
pmc = mc_dereference(idev->mc_tomb, idev);
|
|
RCU_INIT_POINTER(idev->mc_tomb, NULL);
|
|
|
|
for (; pmc; pmc = nextpmc) {
|
|
nextpmc = mc_dereference(pmc->next, idev);
|
|
ip6_mc_clear_src(pmc);
|
|
in6_dev_put(pmc->idev);
|
|
kfree_rcu(pmc, rcu);
|
|
}
|
|
|
|
/* clear dead sources, too */
|
|
for_each_mc_mclock(idev, pmc) {
|
|
struct ip6_sf_list *psf, *psf_next;
|
|
|
|
psf = mc_dereference(pmc->mca_tomb, idev);
|
|
RCU_INIT_POINTER(pmc->mca_tomb, NULL);
|
|
for (; psf; psf = psf_next) {
|
|
psf_next = mc_dereference(psf->sf_next, idev);
|
|
kfree_rcu(psf, rcu);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void mld_clear_query(struct inet6_dev *idev)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
spin_lock_bh(&idev->mc_query_lock);
|
|
while ((skb = __skb_dequeue(&idev->mc_query_queue)))
|
|
kfree_skb(skb);
|
|
spin_unlock_bh(&idev->mc_query_lock);
|
|
}
|
|
|
|
static void mld_clear_report(struct inet6_dev *idev)
|
|
{
|
|
struct sk_buff *skb;
|
|
|
|
spin_lock_bh(&idev->mc_report_lock);
|
|
while ((skb = __skb_dequeue(&idev->mc_report_queue)))
|
|
kfree_skb(skb);
|
|
spin_unlock_bh(&idev->mc_report_lock);
|
|
}
|
|
|
|
static void mca_get(struct ifmcaddr6 *mc)
|
|
{
|
|
refcount_inc(&mc->mca_refcnt);
|
|
}
|
|
|
|
static void ma_put(struct ifmcaddr6 *mc)
|
|
{
|
|
if (refcount_dec_and_test(&mc->mca_refcnt)) {
|
|
in6_dev_put(mc->idev);
|
|
kfree_rcu(mc, rcu);
|
|
}
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static struct ifmcaddr6 *mca_alloc(struct inet6_dev *idev,
|
|
const struct in6_addr *addr,
|
|
unsigned int mode)
|
|
{
|
|
struct ifmcaddr6 *mc;
|
|
|
|
mc = kzalloc(sizeof(*mc), GFP_KERNEL);
|
|
if (!mc)
|
|
return NULL;
|
|
|
|
INIT_DELAYED_WORK(&mc->mca_work, mld_mca_work);
|
|
|
|
mc->mca_addr = *addr;
|
|
mc->idev = idev; /* reference taken by caller */
|
|
mc->mca_users = 1;
|
|
/* mca_stamp should be updated upon changes */
|
|
mc->mca_cstamp = mc->mca_tstamp = jiffies;
|
|
refcount_set(&mc->mca_refcnt, 1);
|
|
|
|
mc->mca_sfmode = mode;
|
|
mc->mca_sfcount[mode] = 1;
|
|
|
|
if (ipv6_addr_is_ll_all_nodes(&mc->mca_addr) ||
|
|
IPV6_ADDR_MC_SCOPE(&mc->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
|
|
mc->mca_flags |= MAF_NOREPORT;
|
|
|
|
return mc;
|
|
}
|
|
|
|
/*
|
|
* device multicast group inc (add if not found)
|
|
*/
|
|
static int __ipv6_dev_mc_inc(struct net_device *dev,
|
|
const struct in6_addr *addr, unsigned int mode)
|
|
{
|
|
struct ifmcaddr6 *mc;
|
|
struct inet6_dev *idev;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
/* we need to take a reference on idev */
|
|
idev = in6_dev_get(dev);
|
|
|
|
if (!idev)
|
|
return -EINVAL;
|
|
|
|
if (idev->dead) {
|
|
in6_dev_put(idev);
|
|
return -ENODEV;
|
|
}
|
|
|
|
mutex_lock(&idev->mc_lock);
|
|
for_each_mc_mclock(idev, mc) {
|
|
if (ipv6_addr_equal(&mc->mca_addr, addr)) {
|
|
mc->mca_users++;
|
|
ip6_mc_add_src(idev, &mc->mca_addr, mode, 0, NULL, 0);
|
|
mutex_unlock(&idev->mc_lock);
|
|
in6_dev_put(idev);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
mc = mca_alloc(idev, addr, mode);
|
|
if (!mc) {
|
|
mutex_unlock(&idev->mc_lock);
|
|
in6_dev_put(idev);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
rcu_assign_pointer(mc->next, idev->mc_list);
|
|
rcu_assign_pointer(idev->mc_list, mc);
|
|
|
|
mca_get(mc);
|
|
|
|
mld_del_delrec(idev, mc);
|
|
igmp6_group_added(mc);
|
|
mutex_unlock(&idev->mc_lock);
|
|
ma_put(mc);
|
|
return 0;
|
|
}
|
|
|
|
int ipv6_dev_mc_inc(struct net_device *dev, const struct in6_addr *addr)
|
|
{
|
|
return __ipv6_dev_mc_inc(dev, addr, MCAST_EXCLUDE);
|
|
}
|
|
EXPORT_SYMBOL(ipv6_dev_mc_inc);
|
|
|
|
/*
|
|
* device multicast group del
|
|
*/
|
|
int __ipv6_dev_mc_dec(struct inet6_dev *idev, const struct in6_addr *addr)
|
|
{
|
|
struct ifmcaddr6 *ma, __rcu **map;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
mutex_lock(&idev->mc_lock);
|
|
for (map = &idev->mc_list;
|
|
(ma = mc_dereference(*map, idev));
|
|
map = &ma->next) {
|
|
if (ipv6_addr_equal(&ma->mca_addr, addr)) {
|
|
if (--ma->mca_users == 0) {
|
|
*map = ma->next;
|
|
|
|
igmp6_group_dropped(ma);
|
|
ip6_mc_clear_src(ma);
|
|
mutex_unlock(&idev->mc_lock);
|
|
|
|
ma_put(ma);
|
|
return 0;
|
|
}
|
|
mutex_unlock(&idev->mc_lock);
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
mutex_unlock(&idev->mc_lock);
|
|
return -ENOENT;
|
|
}
|
|
|
|
int ipv6_dev_mc_dec(struct net_device *dev, const struct in6_addr *addr)
|
|
{
|
|
struct inet6_dev *idev;
|
|
int err;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
idev = __in6_dev_get(dev);
|
|
if (!idev)
|
|
err = -ENODEV;
|
|
else
|
|
err = __ipv6_dev_mc_dec(idev, addr);
|
|
|
|
return err;
|
|
}
|
|
EXPORT_SYMBOL(ipv6_dev_mc_dec);
|
|
|
|
/*
|
|
* check if the interface/address pair is valid
|
|
*/
|
|
bool ipv6_chk_mcast_addr(struct net_device *dev, const struct in6_addr *group,
|
|
const struct in6_addr *src_addr)
|
|
{
|
|
struct inet6_dev *idev;
|
|
struct ifmcaddr6 *mc;
|
|
bool rv = false;
|
|
|
|
rcu_read_lock();
|
|
idev = __in6_dev_get(dev);
|
|
if (idev) {
|
|
for_each_mc_rcu(idev, mc) {
|
|
if (ipv6_addr_equal(&mc->mca_addr, group))
|
|
break;
|
|
}
|
|
if (mc) {
|
|
if (src_addr && !ipv6_addr_any(src_addr)) {
|
|
struct ip6_sf_list *psf;
|
|
|
|
for_each_psf_rcu(mc, psf) {
|
|
if (ipv6_addr_equal(&psf->sf_addr, src_addr))
|
|
break;
|
|
}
|
|
if (psf)
|
|
rv = psf->sf_count[MCAST_INCLUDE] ||
|
|
psf->sf_count[MCAST_EXCLUDE] !=
|
|
mc->mca_sfcount[MCAST_EXCLUDE];
|
|
else
|
|
rv = mc->mca_sfcount[MCAST_EXCLUDE] != 0;
|
|
} else
|
|
rv = true; /* don't filter unspecified source */
|
|
}
|
|
}
|
|
rcu_read_unlock();
|
|
return rv;
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static void mld_gq_start_work(struct inet6_dev *idev)
|
|
{
|
|
unsigned long tv = prandom_u32() % idev->mc_maxdelay;
|
|
|
|
idev->mc_gq_running = 1;
|
|
if (!mod_delayed_work(mld_wq, &idev->mc_gq_work, tv + 2))
|
|
in6_dev_hold(idev);
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static void mld_gq_stop_work(struct inet6_dev *idev)
|
|
{
|
|
idev->mc_gq_running = 0;
|
|
if (cancel_delayed_work(&idev->mc_gq_work))
|
|
__in6_dev_put(idev);
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static void mld_ifc_start_work(struct inet6_dev *idev, unsigned long delay)
|
|
{
|
|
unsigned long tv = prandom_u32() % delay;
|
|
|
|
if (!mod_delayed_work(mld_wq, &idev->mc_ifc_work, tv + 2))
|
|
in6_dev_hold(idev);
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static void mld_ifc_stop_work(struct inet6_dev *idev)
|
|
{
|
|
idev->mc_ifc_count = 0;
|
|
if (cancel_delayed_work(&idev->mc_ifc_work))
|
|
__in6_dev_put(idev);
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static void mld_dad_start_work(struct inet6_dev *idev, unsigned long delay)
|
|
{
|
|
unsigned long tv = prandom_u32() % delay;
|
|
|
|
if (!mod_delayed_work(mld_wq, &idev->mc_dad_work, tv + 2))
|
|
in6_dev_hold(idev);
|
|
}
|
|
|
|
static void mld_dad_stop_work(struct inet6_dev *idev)
|
|
{
|
|
if (cancel_delayed_work(&idev->mc_dad_work))
|
|
__in6_dev_put(idev);
|
|
}
|
|
|
|
static void mld_query_stop_work(struct inet6_dev *idev)
|
|
{
|
|
spin_lock_bh(&idev->mc_query_lock);
|
|
if (cancel_delayed_work(&idev->mc_query_work))
|
|
__in6_dev_put(idev);
|
|
spin_unlock_bh(&idev->mc_query_lock);
|
|
}
|
|
|
|
static void mld_report_stop_work(struct inet6_dev *idev)
|
|
{
|
|
if (cancel_delayed_work_sync(&idev->mc_report_work))
|
|
__in6_dev_put(idev);
|
|
}
|
|
|
|
/*
|
|
* IGMP handling (alias multicast ICMPv6 messages)
|
|
* called with mc_lock
|
|
*/
|
|
static void igmp6_group_queried(struct ifmcaddr6 *ma, unsigned long resptime)
|
|
{
|
|
unsigned long delay = resptime;
|
|
|
|
/* Do not start work for these addresses */
|
|
if (ipv6_addr_is_ll_all_nodes(&ma->mca_addr) ||
|
|
IPV6_ADDR_MC_SCOPE(&ma->mca_addr) < IPV6_ADDR_SCOPE_LINKLOCAL)
|
|
return;
|
|
|
|
if (cancel_delayed_work(&ma->mca_work)) {
|
|
refcount_dec(&ma->mca_refcnt);
|
|
delay = ma->mca_work.timer.expires - jiffies;
|
|
}
|
|
|
|
if (delay >= resptime)
|
|
delay = prandom_u32() % resptime;
|
|
|
|
if (!mod_delayed_work(mld_wq, &ma->mca_work, delay))
|
|
refcount_inc(&ma->mca_refcnt);
|
|
ma->mca_flags |= MAF_TIMER_RUNNING;
|
|
}
|
|
|
|
/* mark EXCLUDE-mode sources
|
|
* called with mc_lock
|
|
*/
|
|
static bool mld_xmarksources(struct ifmcaddr6 *pmc, int nsrcs,
|
|
const struct in6_addr *srcs)
|
|
{
|
|
struct ip6_sf_list *psf;
|
|
int i, scount;
|
|
|
|
scount = 0;
|
|
for_each_psf_mclock(pmc, psf) {
|
|
if (scount == nsrcs)
|
|
break;
|
|
for (i = 0; i < nsrcs; i++) {
|
|
/* skip inactive filters */
|
|
if (psf->sf_count[MCAST_INCLUDE] ||
|
|
pmc->mca_sfcount[MCAST_EXCLUDE] !=
|
|
psf->sf_count[MCAST_EXCLUDE])
|
|
break;
|
|
if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
|
|
scount++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
pmc->mca_flags &= ~MAF_GSQUERY;
|
|
if (scount == nsrcs) /* all sources excluded */
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static bool mld_marksources(struct ifmcaddr6 *pmc, int nsrcs,
|
|
const struct in6_addr *srcs)
|
|
{
|
|
struct ip6_sf_list *psf;
|
|
int i, scount;
|
|
|
|
if (pmc->mca_sfmode == MCAST_EXCLUDE)
|
|
return mld_xmarksources(pmc, nsrcs, srcs);
|
|
|
|
/* mark INCLUDE-mode sources */
|
|
|
|
scount = 0;
|
|
for_each_psf_mclock(pmc, psf) {
|
|
if (scount == nsrcs)
|
|
break;
|
|
for (i = 0; i < nsrcs; i++) {
|
|
if (ipv6_addr_equal(&srcs[i], &psf->sf_addr)) {
|
|
psf->sf_gsresp = 1;
|
|
scount++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (!scount) {
|
|
pmc->mca_flags &= ~MAF_GSQUERY;
|
|
return false;
|
|
}
|
|
pmc->mca_flags |= MAF_GSQUERY;
|
|
return true;
|
|
}
|
|
|
|
static int mld_force_mld_version(const struct inet6_dev *idev)
|
|
{
|
|
/* Normally, both are 0 here. If enforcement to a particular is
|
|
* being used, individual device enforcement will have a lower
|
|
* precedence over 'all' device (.../conf/all/force_mld_version).
|
|
*/
|
|
|
|
if (dev_net(idev->dev)->ipv6.devconf_all->force_mld_version != 0)
|
|
return dev_net(idev->dev)->ipv6.devconf_all->force_mld_version;
|
|
else
|
|
return idev->cnf.force_mld_version;
|
|
}
|
|
|
|
static bool mld_in_v2_mode_only(const struct inet6_dev *idev)
|
|
{
|
|
return mld_force_mld_version(idev) == 2;
|
|
}
|
|
|
|
static bool mld_in_v1_mode_only(const struct inet6_dev *idev)
|
|
{
|
|
return mld_force_mld_version(idev) == 1;
|
|
}
|
|
|
|
static bool mld_in_v1_mode(const struct inet6_dev *idev)
|
|
{
|
|
if (mld_in_v2_mode_only(idev))
|
|
return false;
|
|
if (mld_in_v1_mode_only(idev))
|
|
return true;
|
|
if (idev->mc_v1_seen && time_before(jiffies, idev->mc_v1_seen))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
static void mld_set_v1_mode(struct inet6_dev *idev)
|
|
{
|
|
/* RFC3810, relevant sections:
|
|
* - 9.1. Robustness Variable
|
|
* - 9.2. Query Interval
|
|
* - 9.3. Query Response Interval
|
|
* - 9.12. Older Version Querier Present Timeout
|
|
*/
|
|
unsigned long switchback;
|
|
|
|
switchback = (idev->mc_qrv * idev->mc_qi) + idev->mc_qri;
|
|
|
|
idev->mc_v1_seen = jiffies + switchback;
|
|
}
|
|
|
|
static void mld_update_qrv(struct inet6_dev *idev,
|
|
const struct mld2_query *mlh2)
|
|
{
|
|
/* RFC3810, relevant sections:
|
|
* - 5.1.8. QRV (Querier's Robustness Variable)
|
|
* - 9.1. Robustness Variable
|
|
*/
|
|
|
|
/* The value of the Robustness Variable MUST NOT be zero,
|
|
* and SHOULD NOT be one. Catch this here if we ever run
|
|
* into such a case in future.
|
|
*/
|
|
const int min_qrv = min(MLD_QRV_DEFAULT, sysctl_mld_qrv);
|
|
WARN_ON(idev->mc_qrv == 0);
|
|
|
|
if (mlh2->mld2q_qrv > 0)
|
|
idev->mc_qrv = mlh2->mld2q_qrv;
|
|
|
|
if (unlikely(idev->mc_qrv < min_qrv)) {
|
|
net_warn_ratelimited("IPv6: MLD: clamping QRV from %u to %u!\n",
|
|
idev->mc_qrv, min_qrv);
|
|
idev->mc_qrv = min_qrv;
|
|
}
|
|
}
|
|
|
|
static void mld_update_qi(struct inet6_dev *idev,
|
|
const struct mld2_query *mlh2)
|
|
{
|
|
/* RFC3810, relevant sections:
|
|
* - 5.1.9. QQIC (Querier's Query Interval Code)
|
|
* - 9.2. Query Interval
|
|
* - 9.12. Older Version Querier Present Timeout
|
|
* (the [Query Interval] in the last Query received)
|
|
*/
|
|
unsigned long mc_qqi;
|
|
|
|
if (mlh2->mld2q_qqic < 128) {
|
|
mc_qqi = mlh2->mld2q_qqic;
|
|
} else {
|
|
unsigned long mc_man, mc_exp;
|
|
|
|
mc_exp = MLDV2_QQIC_EXP(mlh2->mld2q_qqic);
|
|
mc_man = MLDV2_QQIC_MAN(mlh2->mld2q_qqic);
|
|
|
|
mc_qqi = (mc_man | 0x10) << (mc_exp + 3);
|
|
}
|
|
|
|
idev->mc_qi = mc_qqi * HZ;
|
|
}
|
|
|
|
static void mld_update_qri(struct inet6_dev *idev,
|
|
const struct mld2_query *mlh2)
|
|
{
|
|
/* RFC3810, relevant sections:
|
|
* - 5.1.3. Maximum Response Code
|
|
* - 9.3. Query Response Interval
|
|
*/
|
|
idev->mc_qri = msecs_to_jiffies(mldv2_mrc(mlh2));
|
|
}
|
|
|
|
static int mld_process_v1(struct inet6_dev *idev, struct mld_msg *mld,
|
|
unsigned long *max_delay, bool v1_query)
|
|
{
|
|
unsigned long mldv1_md;
|
|
|
|
/* Ignore v1 queries */
|
|
if (mld_in_v2_mode_only(idev))
|
|
return -EINVAL;
|
|
|
|
mldv1_md = ntohs(mld->mld_maxdelay);
|
|
|
|
/* When in MLDv1 fallback and a MLDv2 router start-up being
|
|
* unaware of current MLDv1 operation, the MRC == MRD mapping
|
|
* only works when the exponential algorithm is not being
|
|
* used (as MLDv1 is unaware of such things).
|
|
*
|
|
* According to the RFC author, the MLDv2 implementations
|
|
* he's aware of all use a MRC < 32768 on start up queries.
|
|
*
|
|
* Thus, should we *ever* encounter something else larger
|
|
* than that, just assume the maximum possible within our
|
|
* reach.
|
|
*/
|
|
if (!v1_query)
|
|
mldv1_md = min(mldv1_md, MLDV1_MRD_MAX_COMPAT);
|
|
|
|
*max_delay = max(msecs_to_jiffies(mldv1_md), 1UL);
|
|
|
|
/* MLDv1 router present: we need to go into v1 mode *only*
|
|
* when an MLDv1 query is received as per section 9.12. of
|
|
* RFC3810! And we know from RFC2710 section 3.7 that MLDv1
|
|
* queries MUST be of exactly 24 octets.
|
|
*/
|
|
if (v1_query)
|
|
mld_set_v1_mode(idev);
|
|
|
|
/* cancel MLDv2 report work */
|
|
mld_gq_stop_work(idev);
|
|
/* cancel the interface change work */
|
|
mld_ifc_stop_work(idev);
|
|
/* clear deleted report items */
|
|
mld_clear_delrec(idev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mld_process_v2(struct inet6_dev *idev, struct mld2_query *mld,
|
|
unsigned long *max_delay)
|
|
{
|
|
*max_delay = max(msecs_to_jiffies(mldv2_mrc(mld)), 1UL);
|
|
|
|
mld_update_qrv(idev, mld);
|
|
mld_update_qi(idev, mld);
|
|
mld_update_qri(idev, mld);
|
|
|
|
idev->mc_maxdelay = *max_delay;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* called with rcu_read_lock() */
|
|
int igmp6_event_query(struct sk_buff *skb)
|
|
{
|
|
struct inet6_dev *idev = __in6_dev_get(skb->dev);
|
|
|
|
if (!idev)
|
|
return -EINVAL;
|
|
|
|
if (idev->dead) {
|
|
kfree_skb(skb);
|
|
return -ENODEV;
|
|
}
|
|
|
|
spin_lock_bh(&idev->mc_query_lock);
|
|
if (skb_queue_len(&idev->mc_query_queue) < MLD_MAX_SKBS) {
|
|
__skb_queue_tail(&idev->mc_query_queue, skb);
|
|
if (!mod_delayed_work(mld_wq, &idev->mc_query_work, 0))
|
|
in6_dev_hold(idev);
|
|
}
|
|
spin_unlock_bh(&idev->mc_query_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __mld_query_work(struct sk_buff *skb)
|
|
{
|
|
struct mld2_query *mlh2 = NULL;
|
|
const struct in6_addr *group;
|
|
unsigned long max_delay;
|
|
struct inet6_dev *idev;
|
|
struct ifmcaddr6 *ma;
|
|
struct mld_msg *mld;
|
|
int group_type;
|
|
int mark = 0;
|
|
int len, err;
|
|
|
|
if (!pskb_may_pull(skb, sizeof(struct in6_addr)))
|
|
goto kfree_skb;
|
|
|
|
/* compute payload length excluding extension headers */
|
|
len = ntohs(ipv6_hdr(skb)->payload_len) + sizeof(struct ipv6hdr);
|
|
len -= skb_network_header_len(skb);
|
|
|
|
/* RFC3810 6.2
|
|
* Upon reception of an MLD message that contains a Query, the node
|
|
* checks if the source address of the message is a valid link-local
|
|
* address, if the Hop Limit is set to 1, and if the Router Alert
|
|
* option is present in the Hop-By-Hop Options header of the IPv6
|
|
* packet. If any of these checks fails, the packet is dropped.
|
|
*/
|
|
if (!(ipv6_addr_type(&ipv6_hdr(skb)->saddr) & IPV6_ADDR_LINKLOCAL) ||
|
|
ipv6_hdr(skb)->hop_limit != 1 ||
|
|
!(IP6CB(skb)->flags & IP6SKB_ROUTERALERT) ||
|
|
IP6CB(skb)->ra != htons(IPV6_OPT_ROUTERALERT_MLD))
|
|
goto kfree_skb;
|
|
|
|
idev = in6_dev_get(skb->dev);
|
|
if (!idev)
|
|
goto kfree_skb;
|
|
|
|
mld = (struct mld_msg *)icmp6_hdr(skb);
|
|
group = &mld->mld_mca;
|
|
group_type = ipv6_addr_type(group);
|
|
|
|
if (group_type != IPV6_ADDR_ANY &&
|
|
!(group_type&IPV6_ADDR_MULTICAST))
|
|
goto out;
|
|
|
|
if (len < MLD_V1_QUERY_LEN) {
|
|
goto out;
|
|
} else if (len == MLD_V1_QUERY_LEN || mld_in_v1_mode(idev)) {
|
|
err = mld_process_v1(idev, mld, &max_delay,
|
|
len == MLD_V1_QUERY_LEN);
|
|
if (err < 0)
|
|
goto out;
|
|
} else if (len >= MLD_V2_QUERY_LEN_MIN) {
|
|
int srcs_offset = sizeof(struct mld2_query) -
|
|
sizeof(struct icmp6hdr);
|
|
|
|
if (!pskb_may_pull(skb, srcs_offset))
|
|
goto out;
|
|
|
|
mlh2 = (struct mld2_query *)skb_transport_header(skb);
|
|
|
|
err = mld_process_v2(idev, mlh2, &max_delay);
|
|
if (err < 0)
|
|
goto out;
|
|
|
|
if (group_type == IPV6_ADDR_ANY) { /* general query */
|
|
if (mlh2->mld2q_nsrcs)
|
|
goto out; /* no sources allowed */
|
|
|
|
mld_gq_start_work(idev);
|
|
goto out;
|
|
}
|
|
/* mark sources to include, if group & source-specific */
|
|
if (mlh2->mld2q_nsrcs != 0) {
|
|
if (!pskb_may_pull(skb, srcs_offset +
|
|
ntohs(mlh2->mld2q_nsrcs) * sizeof(struct in6_addr)))
|
|
goto out;
|
|
|
|
mlh2 = (struct mld2_query *)skb_transport_header(skb);
|
|
mark = 1;
|
|
}
|
|
} else {
|
|
goto out;
|
|
}
|
|
|
|
if (group_type == IPV6_ADDR_ANY) {
|
|
for_each_mc_mclock(idev, ma) {
|
|
igmp6_group_queried(ma, max_delay);
|
|
}
|
|
} else {
|
|
for_each_mc_mclock(idev, ma) {
|
|
if (!ipv6_addr_equal(group, &ma->mca_addr))
|
|
continue;
|
|
if (ma->mca_flags & MAF_TIMER_RUNNING) {
|
|
/* gsquery <- gsquery && mark */
|
|
if (!mark)
|
|
ma->mca_flags &= ~MAF_GSQUERY;
|
|
} else {
|
|
/* gsquery <- mark */
|
|
if (mark)
|
|
ma->mca_flags |= MAF_GSQUERY;
|
|
else
|
|
ma->mca_flags &= ~MAF_GSQUERY;
|
|
}
|
|
if (!(ma->mca_flags & MAF_GSQUERY) ||
|
|
mld_marksources(ma, ntohs(mlh2->mld2q_nsrcs), mlh2->mld2q_srcs))
|
|
igmp6_group_queried(ma, max_delay);
|
|
break;
|
|
}
|
|
}
|
|
|
|
out:
|
|
in6_dev_put(idev);
|
|
kfree_skb:
|
|
consume_skb(skb);
|
|
}
|
|
|
|
static void mld_query_work(struct work_struct *work)
|
|
{
|
|
struct inet6_dev *idev = container_of(to_delayed_work(work),
|
|
struct inet6_dev,
|
|
mc_query_work);
|
|
struct sk_buff_head q;
|
|
struct sk_buff *skb;
|
|
bool rework = false;
|
|
int cnt = 0;
|
|
|
|
skb_queue_head_init(&q);
|
|
|
|
spin_lock_bh(&idev->mc_query_lock);
|
|
while ((skb = __skb_dequeue(&idev->mc_query_queue))) {
|
|
__skb_queue_tail(&q, skb);
|
|
|
|
if (++cnt >= MLD_MAX_QUEUE) {
|
|
rework = true;
|
|
schedule_delayed_work(&idev->mc_query_work, 0);
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_bh(&idev->mc_query_lock);
|
|
|
|
mutex_lock(&idev->mc_lock);
|
|
while ((skb = __skb_dequeue(&q)))
|
|
__mld_query_work(skb);
|
|
mutex_unlock(&idev->mc_lock);
|
|
|
|
if (!rework)
|
|
in6_dev_put(idev);
|
|
}
|
|
|
|
/* called with rcu_read_lock() */
|
|
int igmp6_event_report(struct sk_buff *skb)
|
|
{
|
|
struct inet6_dev *idev = __in6_dev_get(skb->dev);
|
|
|
|
if (!idev)
|
|
return -EINVAL;
|
|
|
|
if (idev->dead) {
|
|
kfree_skb(skb);
|
|
return -ENODEV;
|
|
}
|
|
|
|
spin_lock_bh(&idev->mc_report_lock);
|
|
if (skb_queue_len(&idev->mc_report_queue) < MLD_MAX_SKBS) {
|
|
__skb_queue_tail(&idev->mc_report_queue, skb);
|
|
if (!mod_delayed_work(mld_wq, &idev->mc_report_work, 0))
|
|
in6_dev_hold(idev);
|
|
}
|
|
spin_unlock_bh(&idev->mc_report_lock);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __mld_report_work(struct sk_buff *skb)
|
|
{
|
|
struct inet6_dev *idev;
|
|
struct ifmcaddr6 *ma;
|
|
struct mld_msg *mld;
|
|
int addr_type;
|
|
|
|
/* Our own report looped back. Ignore it. */
|
|
if (skb->pkt_type == PACKET_LOOPBACK)
|
|
goto kfree_skb;
|
|
|
|
/* send our report if the MC router may not have heard this report */
|
|
if (skb->pkt_type != PACKET_MULTICAST &&
|
|
skb->pkt_type != PACKET_BROADCAST)
|
|
goto kfree_skb;
|
|
|
|
if (!pskb_may_pull(skb, sizeof(*mld) - sizeof(struct icmp6hdr)))
|
|
goto kfree_skb;
|
|
|
|
mld = (struct mld_msg *)icmp6_hdr(skb);
|
|
|
|
/* Drop reports with not link local source */
|
|
addr_type = ipv6_addr_type(&ipv6_hdr(skb)->saddr);
|
|
if (addr_type != IPV6_ADDR_ANY &&
|
|
!(addr_type&IPV6_ADDR_LINKLOCAL))
|
|
goto kfree_skb;
|
|
|
|
idev = in6_dev_get(skb->dev);
|
|
if (!idev)
|
|
goto kfree_skb;
|
|
|
|
/*
|
|
* Cancel the work for this group
|
|
*/
|
|
|
|
for_each_mc_mclock(idev, ma) {
|
|
if (ipv6_addr_equal(&ma->mca_addr, &mld->mld_mca)) {
|
|
if (cancel_delayed_work(&ma->mca_work))
|
|
refcount_dec(&ma->mca_refcnt);
|
|
ma->mca_flags &= ~(MAF_LAST_REPORTER |
|
|
MAF_TIMER_RUNNING);
|
|
break;
|
|
}
|
|
}
|
|
|
|
in6_dev_put(idev);
|
|
kfree_skb:
|
|
consume_skb(skb);
|
|
}
|
|
|
|
static void mld_report_work(struct work_struct *work)
|
|
{
|
|
struct inet6_dev *idev = container_of(to_delayed_work(work),
|
|
struct inet6_dev,
|
|
mc_report_work);
|
|
struct sk_buff_head q;
|
|
struct sk_buff *skb;
|
|
bool rework = false;
|
|
int cnt = 0;
|
|
|
|
skb_queue_head_init(&q);
|
|
spin_lock_bh(&idev->mc_report_lock);
|
|
while ((skb = __skb_dequeue(&idev->mc_report_queue))) {
|
|
__skb_queue_tail(&q, skb);
|
|
|
|
if (++cnt >= MLD_MAX_QUEUE) {
|
|
rework = true;
|
|
schedule_delayed_work(&idev->mc_report_work, 0);
|
|
break;
|
|
}
|
|
}
|
|
spin_unlock_bh(&idev->mc_report_lock);
|
|
|
|
mutex_lock(&idev->mc_lock);
|
|
while ((skb = __skb_dequeue(&q)))
|
|
__mld_report_work(skb);
|
|
mutex_unlock(&idev->mc_lock);
|
|
|
|
if (!rework)
|
|
in6_dev_put(idev);
|
|
}
|
|
|
|
static bool is_in(struct ifmcaddr6 *pmc, struct ip6_sf_list *psf, int type,
|
|
int gdeleted, int sdeleted)
|
|
{
|
|
switch (type) {
|
|
case MLD2_MODE_IS_INCLUDE:
|
|
case MLD2_MODE_IS_EXCLUDE:
|
|
if (gdeleted || sdeleted)
|
|
return false;
|
|
if (!((pmc->mca_flags & MAF_GSQUERY) && !psf->sf_gsresp)) {
|
|
if (pmc->mca_sfmode == MCAST_INCLUDE)
|
|
return true;
|
|
/* don't include if this source is excluded
|
|
* in all filters
|
|
*/
|
|
if (psf->sf_count[MCAST_INCLUDE])
|
|
return type == MLD2_MODE_IS_INCLUDE;
|
|
return pmc->mca_sfcount[MCAST_EXCLUDE] ==
|
|
psf->sf_count[MCAST_EXCLUDE];
|
|
}
|
|
return false;
|
|
case MLD2_CHANGE_TO_INCLUDE:
|
|
if (gdeleted || sdeleted)
|
|
return false;
|
|
return psf->sf_count[MCAST_INCLUDE] != 0;
|
|
case MLD2_CHANGE_TO_EXCLUDE:
|
|
if (gdeleted || sdeleted)
|
|
return false;
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE] == 0 ||
|
|
psf->sf_count[MCAST_INCLUDE])
|
|
return false;
|
|
return pmc->mca_sfcount[MCAST_EXCLUDE] ==
|
|
psf->sf_count[MCAST_EXCLUDE];
|
|
case MLD2_ALLOW_NEW_SOURCES:
|
|
if (gdeleted || !psf->sf_crcount)
|
|
return false;
|
|
return (pmc->mca_sfmode == MCAST_INCLUDE) ^ sdeleted;
|
|
case MLD2_BLOCK_OLD_SOURCES:
|
|
if (pmc->mca_sfmode == MCAST_INCLUDE)
|
|
return gdeleted || (psf->sf_crcount && sdeleted);
|
|
return psf->sf_crcount && !gdeleted && !sdeleted;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static int
|
|
mld_scount(struct ifmcaddr6 *pmc, int type, int gdeleted, int sdeleted)
|
|
{
|
|
struct ip6_sf_list *psf;
|
|
int scount = 0;
|
|
|
|
for_each_psf_mclock(pmc, psf) {
|
|
if (!is_in(pmc, psf, type, gdeleted, sdeleted))
|
|
continue;
|
|
scount++;
|
|
}
|
|
return scount;
|
|
}
|
|
|
|
static void ip6_mc_hdr(struct sock *sk, struct sk_buff *skb,
|
|
struct net_device *dev,
|
|
const struct in6_addr *saddr,
|
|
const struct in6_addr *daddr,
|
|
int proto, int len)
|
|
{
|
|
struct ipv6hdr *hdr;
|
|
|
|
skb->protocol = htons(ETH_P_IPV6);
|
|
skb->dev = dev;
|
|
|
|
skb_reset_network_header(skb);
|
|
skb_put(skb, sizeof(struct ipv6hdr));
|
|
hdr = ipv6_hdr(skb);
|
|
|
|
ip6_flow_hdr(hdr, 0, 0);
|
|
|
|
hdr->payload_len = htons(len);
|
|
hdr->nexthdr = proto;
|
|
hdr->hop_limit = inet6_sk(sk)->hop_limit;
|
|
|
|
hdr->saddr = *saddr;
|
|
hdr->daddr = *daddr;
|
|
}
|
|
|
|
static struct sk_buff *mld_newpack(struct inet6_dev *idev, unsigned int mtu)
|
|
{
|
|
u8 ra[8] = { IPPROTO_ICMPV6, 0, IPV6_TLV_ROUTERALERT,
|
|
2, 0, 0, IPV6_TLV_PADN, 0 };
|
|
struct net_device *dev = idev->dev;
|
|
int hlen = LL_RESERVED_SPACE(dev);
|
|
int tlen = dev->needed_tailroom;
|
|
struct net *net = dev_net(dev);
|
|
const struct in6_addr *saddr;
|
|
struct in6_addr addr_buf;
|
|
struct mld2_report *pmr;
|
|
struct sk_buff *skb;
|
|
unsigned int size;
|
|
struct sock *sk;
|
|
int err;
|
|
|
|
sk = net->ipv6.igmp_sk;
|
|
/* we assume size > sizeof(ra) here
|
|
* Also try to not allocate high-order pages for big MTU
|
|
*/
|
|
size = min_t(int, mtu, PAGE_SIZE / 2) + hlen + tlen;
|
|
skb = sock_alloc_send_skb(sk, size, 1, &err);
|
|
if (!skb)
|
|
return NULL;
|
|
|
|
skb->priority = TC_PRIO_CONTROL;
|
|
skb_reserve(skb, hlen);
|
|
skb_tailroom_reserve(skb, mtu, tlen);
|
|
|
|
if (__ipv6_get_lladdr(idev, &addr_buf, IFA_F_TENTATIVE)) {
|
|
/* <draft-ietf-magma-mld-source-05.txt>:
|
|
* use unspecified address as the source address
|
|
* when a valid link-local address is not available.
|
|
*/
|
|
saddr = &in6addr_any;
|
|
} else
|
|
saddr = &addr_buf;
|
|
|
|
ip6_mc_hdr(sk, skb, dev, saddr, &mld2_all_mcr, NEXTHDR_HOP, 0);
|
|
|
|
skb_put_data(skb, ra, sizeof(ra));
|
|
|
|
skb_set_transport_header(skb, skb_tail_pointer(skb) - skb->data);
|
|
skb_put(skb, sizeof(*pmr));
|
|
pmr = (struct mld2_report *)skb_transport_header(skb);
|
|
pmr->mld2r_type = ICMPV6_MLD2_REPORT;
|
|
pmr->mld2r_resv1 = 0;
|
|
pmr->mld2r_cksum = 0;
|
|
pmr->mld2r_resv2 = 0;
|
|
pmr->mld2r_ngrec = 0;
|
|
return skb;
|
|
}
|
|
|
|
static void mld_sendpack(struct sk_buff *skb)
|
|
{
|
|
struct ipv6hdr *pip6 = ipv6_hdr(skb);
|
|
struct mld2_report *pmr =
|
|
(struct mld2_report *)skb_transport_header(skb);
|
|
int payload_len, mldlen;
|
|
struct inet6_dev *idev;
|
|
struct net *net = dev_net(skb->dev);
|
|
int err;
|
|
struct flowi6 fl6;
|
|
struct dst_entry *dst;
|
|
|
|
rcu_read_lock();
|
|
idev = __in6_dev_get(skb->dev);
|
|
IP6_UPD_PO_STATS(net, idev, IPSTATS_MIB_OUT, skb->len);
|
|
|
|
payload_len = (skb_tail_pointer(skb) - skb_network_header(skb)) -
|
|
sizeof(*pip6);
|
|
mldlen = skb_tail_pointer(skb) - skb_transport_header(skb);
|
|
pip6->payload_len = htons(payload_len);
|
|
|
|
pmr->mld2r_cksum = csum_ipv6_magic(&pip6->saddr, &pip6->daddr, mldlen,
|
|
IPPROTO_ICMPV6,
|
|
csum_partial(skb_transport_header(skb),
|
|
mldlen, 0));
|
|
|
|
icmpv6_flow_init(net->ipv6.igmp_sk, &fl6, ICMPV6_MLD2_REPORT,
|
|
&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
|
|
skb->dev->ifindex);
|
|
dst = icmp6_dst_alloc(skb->dev, &fl6);
|
|
|
|
err = 0;
|
|
if (IS_ERR(dst)) {
|
|
err = PTR_ERR(dst);
|
|
dst = NULL;
|
|
}
|
|
skb_dst_set(skb, dst);
|
|
if (err)
|
|
goto err_out;
|
|
|
|
err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT,
|
|
net, net->ipv6.igmp_sk, skb, NULL, skb->dev,
|
|
dst_output);
|
|
out:
|
|
if (!err) {
|
|
ICMP6MSGOUT_INC_STATS(net, idev, ICMPV6_MLD2_REPORT);
|
|
ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
|
|
} else {
|
|
IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
return;
|
|
|
|
err_out:
|
|
kfree_skb(skb);
|
|
goto out;
|
|
}
|
|
|
|
static int grec_size(struct ifmcaddr6 *pmc, int type, int gdel, int sdel)
|
|
{
|
|
return sizeof(struct mld2_grec) + 16 * mld_scount(pmc,type,gdel,sdel);
|
|
}
|
|
|
|
static struct sk_buff *add_grhead(struct sk_buff *skb, struct ifmcaddr6 *pmc,
|
|
int type, struct mld2_grec **ppgr, unsigned int mtu)
|
|
{
|
|
struct mld2_report *pmr;
|
|
struct mld2_grec *pgr;
|
|
|
|
if (!skb) {
|
|
skb = mld_newpack(pmc->idev, mtu);
|
|
if (!skb)
|
|
return NULL;
|
|
}
|
|
pgr = skb_put(skb, sizeof(struct mld2_grec));
|
|
pgr->grec_type = type;
|
|
pgr->grec_auxwords = 0;
|
|
pgr->grec_nsrcs = 0;
|
|
pgr->grec_mca = pmc->mca_addr; /* structure copy */
|
|
pmr = (struct mld2_report *)skb_transport_header(skb);
|
|
pmr->mld2r_ngrec = htons(ntohs(pmr->mld2r_ngrec)+1);
|
|
*ppgr = pgr;
|
|
return skb;
|
|
}
|
|
|
|
#define AVAILABLE(skb) ((skb) ? skb_availroom(skb) : 0)
|
|
|
|
/* called with mc_lock */
|
|
static struct sk_buff *add_grec(struct sk_buff *skb, struct ifmcaddr6 *pmc,
|
|
int type, int gdeleted, int sdeleted,
|
|
int crsend)
|
|
{
|
|
struct ip6_sf_list *psf, *psf_prev, *psf_next;
|
|
int scount, stotal, first, isquery, truncate;
|
|
struct ip6_sf_list __rcu **psf_list;
|
|
struct inet6_dev *idev = pmc->idev;
|
|
struct net_device *dev = idev->dev;
|
|
struct mld2_grec *pgr = NULL;
|
|
struct mld2_report *pmr;
|
|
unsigned int mtu;
|
|
|
|
if (pmc->mca_flags & MAF_NOREPORT)
|
|
return skb;
|
|
|
|
mtu = READ_ONCE(dev->mtu);
|
|
if (mtu < IPV6_MIN_MTU)
|
|
return skb;
|
|
|
|
isquery = type == MLD2_MODE_IS_INCLUDE ||
|
|
type == MLD2_MODE_IS_EXCLUDE;
|
|
truncate = type == MLD2_MODE_IS_EXCLUDE ||
|
|
type == MLD2_CHANGE_TO_EXCLUDE;
|
|
|
|
stotal = scount = 0;
|
|
|
|
psf_list = sdeleted ? &pmc->mca_tomb : &pmc->mca_sources;
|
|
|
|
if (!rcu_access_pointer(*psf_list))
|
|
goto empty_source;
|
|
|
|
pmr = skb ? (struct mld2_report *)skb_transport_header(skb) : NULL;
|
|
|
|
/* EX and TO_EX get a fresh packet, if needed */
|
|
if (truncate) {
|
|
if (pmr && pmr->mld2r_ngrec &&
|
|
AVAILABLE(skb) < grec_size(pmc, type, gdeleted, sdeleted)) {
|
|
if (skb)
|
|
mld_sendpack(skb);
|
|
skb = mld_newpack(idev, mtu);
|
|
}
|
|
}
|
|
first = 1;
|
|
psf_prev = NULL;
|
|
for (psf = mc_dereference(*psf_list, idev);
|
|
psf;
|
|
psf = psf_next) {
|
|
struct in6_addr *psrc;
|
|
|
|
psf_next = mc_dereference(psf->sf_next, idev);
|
|
|
|
if (!is_in(pmc, psf, type, gdeleted, sdeleted) && !crsend) {
|
|
psf_prev = psf;
|
|
continue;
|
|
}
|
|
|
|
/* Based on RFC3810 6.1. Should not send source-list change
|
|
* records when there is a filter mode change.
|
|
*/
|
|
if (((gdeleted && pmc->mca_sfmode == MCAST_EXCLUDE) ||
|
|
(!gdeleted && pmc->mca_crcount)) &&
|
|
(type == MLD2_ALLOW_NEW_SOURCES ||
|
|
type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount)
|
|
goto decrease_sf_crcount;
|
|
|
|
/* clear marks on query responses */
|
|
if (isquery)
|
|
psf->sf_gsresp = 0;
|
|
|
|
if (AVAILABLE(skb) < sizeof(*psrc) +
|
|
first*sizeof(struct mld2_grec)) {
|
|
if (truncate && !first)
|
|
break; /* truncate these */
|
|
if (pgr)
|
|
pgr->grec_nsrcs = htons(scount);
|
|
if (skb)
|
|
mld_sendpack(skb);
|
|
skb = mld_newpack(idev, mtu);
|
|
first = 1;
|
|
scount = 0;
|
|
}
|
|
if (first) {
|
|
skb = add_grhead(skb, pmc, type, &pgr, mtu);
|
|
first = 0;
|
|
}
|
|
if (!skb)
|
|
return NULL;
|
|
psrc = skb_put(skb, sizeof(*psrc));
|
|
*psrc = psf->sf_addr;
|
|
scount++; stotal++;
|
|
if ((type == MLD2_ALLOW_NEW_SOURCES ||
|
|
type == MLD2_BLOCK_OLD_SOURCES) && psf->sf_crcount) {
|
|
decrease_sf_crcount:
|
|
psf->sf_crcount--;
|
|
if ((sdeleted || gdeleted) && psf->sf_crcount == 0) {
|
|
if (psf_prev)
|
|
rcu_assign_pointer(psf_prev->sf_next,
|
|
mc_dereference(psf->sf_next, idev));
|
|
else
|
|
rcu_assign_pointer(*psf_list,
|
|
mc_dereference(psf->sf_next, idev));
|
|
kfree_rcu(psf, rcu);
|
|
continue;
|
|
}
|
|
}
|
|
psf_prev = psf;
|
|
}
|
|
|
|
empty_source:
|
|
if (!stotal) {
|
|
if (type == MLD2_ALLOW_NEW_SOURCES ||
|
|
type == MLD2_BLOCK_OLD_SOURCES)
|
|
return skb;
|
|
if (pmc->mca_crcount || isquery || crsend) {
|
|
/* make sure we have room for group header */
|
|
if (skb && AVAILABLE(skb) < sizeof(struct mld2_grec)) {
|
|
mld_sendpack(skb);
|
|
skb = NULL; /* add_grhead will get a new one */
|
|
}
|
|
skb = add_grhead(skb, pmc, type, &pgr, mtu);
|
|
}
|
|
}
|
|
if (pgr)
|
|
pgr->grec_nsrcs = htons(scount);
|
|
|
|
if (isquery)
|
|
pmc->mca_flags &= ~MAF_GSQUERY; /* clear query state */
|
|
return skb;
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static void mld_send_report(struct inet6_dev *idev, struct ifmcaddr6 *pmc)
|
|
{
|
|
struct sk_buff *skb = NULL;
|
|
int type;
|
|
|
|
if (!pmc) {
|
|
for_each_mc_mclock(idev, pmc) {
|
|
if (pmc->mca_flags & MAF_NOREPORT)
|
|
continue;
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE])
|
|
type = MLD2_MODE_IS_EXCLUDE;
|
|
else
|
|
type = MLD2_MODE_IS_INCLUDE;
|
|
skb = add_grec(skb, pmc, type, 0, 0, 0);
|
|
}
|
|
} else {
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE])
|
|
type = MLD2_MODE_IS_EXCLUDE;
|
|
else
|
|
type = MLD2_MODE_IS_INCLUDE;
|
|
skb = add_grec(skb, pmc, type, 0, 0, 0);
|
|
}
|
|
if (skb)
|
|
mld_sendpack(skb);
|
|
}
|
|
|
|
/*
|
|
* remove zero-count source records from a source filter list
|
|
* called with mc_lock
|
|
*/
|
|
static void mld_clear_zeros(struct ip6_sf_list __rcu **ppsf, struct inet6_dev *idev)
|
|
{
|
|
struct ip6_sf_list *psf_prev, *psf_next, *psf;
|
|
|
|
psf_prev = NULL;
|
|
for (psf = mc_dereference(*ppsf, idev);
|
|
psf;
|
|
psf = psf_next) {
|
|
psf_next = mc_dereference(psf->sf_next, idev);
|
|
if (psf->sf_crcount == 0) {
|
|
if (psf_prev)
|
|
rcu_assign_pointer(psf_prev->sf_next,
|
|
mc_dereference(psf->sf_next, idev));
|
|
else
|
|
rcu_assign_pointer(*ppsf,
|
|
mc_dereference(psf->sf_next, idev));
|
|
kfree_rcu(psf, rcu);
|
|
} else {
|
|
psf_prev = psf;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static void mld_send_cr(struct inet6_dev *idev)
|
|
{
|
|
struct ifmcaddr6 *pmc, *pmc_prev, *pmc_next;
|
|
struct sk_buff *skb = NULL;
|
|
int type, dtype;
|
|
|
|
/* deleted MCA's */
|
|
pmc_prev = NULL;
|
|
for (pmc = mc_dereference(idev->mc_tomb, idev);
|
|
pmc;
|
|
pmc = pmc_next) {
|
|
pmc_next = mc_dereference(pmc->next, idev);
|
|
if (pmc->mca_sfmode == MCAST_INCLUDE) {
|
|
type = MLD2_BLOCK_OLD_SOURCES;
|
|
dtype = MLD2_BLOCK_OLD_SOURCES;
|
|
skb = add_grec(skb, pmc, type, 1, 0, 0);
|
|
skb = add_grec(skb, pmc, dtype, 1, 1, 0);
|
|
}
|
|
if (pmc->mca_crcount) {
|
|
if (pmc->mca_sfmode == MCAST_EXCLUDE) {
|
|
type = MLD2_CHANGE_TO_INCLUDE;
|
|
skb = add_grec(skb, pmc, type, 1, 0, 0);
|
|
}
|
|
pmc->mca_crcount--;
|
|
if (pmc->mca_crcount == 0) {
|
|
mld_clear_zeros(&pmc->mca_tomb, idev);
|
|
mld_clear_zeros(&pmc->mca_sources, idev);
|
|
}
|
|
}
|
|
if (pmc->mca_crcount == 0 &&
|
|
!rcu_access_pointer(pmc->mca_tomb) &&
|
|
!rcu_access_pointer(pmc->mca_sources)) {
|
|
if (pmc_prev)
|
|
rcu_assign_pointer(pmc_prev->next, pmc_next);
|
|
else
|
|
rcu_assign_pointer(idev->mc_tomb, pmc_next);
|
|
in6_dev_put(pmc->idev);
|
|
kfree_rcu(pmc, rcu);
|
|
} else
|
|
pmc_prev = pmc;
|
|
}
|
|
|
|
/* change recs */
|
|
for_each_mc_mclock(idev, pmc) {
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
|
|
type = MLD2_BLOCK_OLD_SOURCES;
|
|
dtype = MLD2_ALLOW_NEW_SOURCES;
|
|
} else {
|
|
type = MLD2_ALLOW_NEW_SOURCES;
|
|
dtype = MLD2_BLOCK_OLD_SOURCES;
|
|
}
|
|
skb = add_grec(skb, pmc, type, 0, 0, 0);
|
|
skb = add_grec(skb, pmc, dtype, 0, 1, 0); /* deleted sources */
|
|
|
|
/* filter mode changes */
|
|
if (pmc->mca_crcount) {
|
|
if (pmc->mca_sfmode == MCAST_EXCLUDE)
|
|
type = MLD2_CHANGE_TO_EXCLUDE;
|
|
else
|
|
type = MLD2_CHANGE_TO_INCLUDE;
|
|
skb = add_grec(skb, pmc, type, 0, 0, 0);
|
|
pmc->mca_crcount--;
|
|
}
|
|
}
|
|
if (!skb)
|
|
return;
|
|
(void) mld_sendpack(skb);
|
|
}
|
|
|
|
static void igmp6_send(struct in6_addr *addr, struct net_device *dev, int type)
|
|
{
|
|
struct net *net = dev_net(dev);
|
|
struct sock *sk = net->ipv6.igmp_sk;
|
|
struct inet6_dev *idev;
|
|
struct sk_buff *skb;
|
|
struct mld_msg *hdr;
|
|
const struct in6_addr *snd_addr, *saddr;
|
|
struct in6_addr addr_buf;
|
|
int hlen = LL_RESERVED_SPACE(dev);
|
|
int tlen = dev->needed_tailroom;
|
|
int err, len, payload_len, full_len;
|
|
u8 ra[8] = { IPPROTO_ICMPV6, 0,
|
|
IPV6_TLV_ROUTERALERT, 2, 0, 0,
|
|
IPV6_TLV_PADN, 0 };
|
|
struct flowi6 fl6;
|
|
struct dst_entry *dst;
|
|
|
|
if (type == ICMPV6_MGM_REDUCTION)
|
|
snd_addr = &in6addr_linklocal_allrouters;
|
|
else
|
|
snd_addr = addr;
|
|
|
|
len = sizeof(struct icmp6hdr) + sizeof(struct in6_addr);
|
|
payload_len = len + sizeof(ra);
|
|
full_len = sizeof(struct ipv6hdr) + payload_len;
|
|
|
|
rcu_read_lock();
|
|
IP6_UPD_PO_STATS(net, __in6_dev_get(dev),
|
|
IPSTATS_MIB_OUT, full_len);
|
|
rcu_read_unlock();
|
|
|
|
skb = sock_alloc_send_skb(sk, hlen + tlen + full_len, 1, &err);
|
|
|
|
if (!skb) {
|
|
rcu_read_lock();
|
|
IP6_INC_STATS(net, __in6_dev_get(dev),
|
|
IPSTATS_MIB_OUTDISCARDS);
|
|
rcu_read_unlock();
|
|
return;
|
|
}
|
|
skb->priority = TC_PRIO_CONTROL;
|
|
skb_reserve(skb, hlen);
|
|
|
|
if (ipv6_get_lladdr(dev, &addr_buf, IFA_F_TENTATIVE)) {
|
|
/* <draft-ietf-magma-mld-source-05.txt>:
|
|
* use unspecified address as the source address
|
|
* when a valid link-local address is not available.
|
|
*/
|
|
saddr = &in6addr_any;
|
|
} else
|
|
saddr = &addr_buf;
|
|
|
|
ip6_mc_hdr(sk, skb, dev, saddr, snd_addr, NEXTHDR_HOP, payload_len);
|
|
|
|
skb_put_data(skb, ra, sizeof(ra));
|
|
|
|
hdr = skb_put_zero(skb, sizeof(struct mld_msg));
|
|
hdr->mld_type = type;
|
|
hdr->mld_mca = *addr;
|
|
|
|
hdr->mld_cksum = csum_ipv6_magic(saddr, snd_addr, len,
|
|
IPPROTO_ICMPV6,
|
|
csum_partial(hdr, len, 0));
|
|
|
|
rcu_read_lock();
|
|
idev = __in6_dev_get(skb->dev);
|
|
|
|
icmpv6_flow_init(sk, &fl6, type,
|
|
&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr,
|
|
skb->dev->ifindex);
|
|
dst = icmp6_dst_alloc(skb->dev, &fl6);
|
|
if (IS_ERR(dst)) {
|
|
err = PTR_ERR(dst);
|
|
goto err_out;
|
|
}
|
|
|
|
skb_dst_set(skb, dst);
|
|
err = NF_HOOK(NFPROTO_IPV6, NF_INET_LOCAL_OUT,
|
|
net, sk, skb, NULL, skb->dev,
|
|
dst_output);
|
|
out:
|
|
if (!err) {
|
|
ICMP6MSGOUT_INC_STATS(net, idev, type);
|
|
ICMP6_INC_STATS(net, idev, ICMP6_MIB_OUTMSGS);
|
|
} else
|
|
IP6_INC_STATS(net, idev, IPSTATS_MIB_OUTDISCARDS);
|
|
|
|
rcu_read_unlock();
|
|
return;
|
|
|
|
err_out:
|
|
kfree_skb(skb);
|
|
goto out;
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static void mld_send_initial_cr(struct inet6_dev *idev)
|
|
{
|
|
struct sk_buff *skb;
|
|
struct ifmcaddr6 *pmc;
|
|
int type;
|
|
|
|
if (mld_in_v1_mode(idev))
|
|
return;
|
|
|
|
skb = NULL;
|
|
for_each_mc_mclock(idev, pmc) {
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE])
|
|
type = MLD2_CHANGE_TO_EXCLUDE;
|
|
else
|
|
type = MLD2_ALLOW_NEW_SOURCES;
|
|
skb = add_grec(skb, pmc, type, 0, 0, 1);
|
|
}
|
|
if (skb)
|
|
mld_sendpack(skb);
|
|
}
|
|
|
|
void ipv6_mc_dad_complete(struct inet6_dev *idev)
|
|
{
|
|
mutex_lock(&idev->mc_lock);
|
|
idev->mc_dad_count = idev->mc_qrv;
|
|
if (idev->mc_dad_count) {
|
|
mld_send_initial_cr(idev);
|
|
idev->mc_dad_count--;
|
|
if (idev->mc_dad_count)
|
|
mld_dad_start_work(idev,
|
|
unsolicited_report_interval(idev));
|
|
}
|
|
mutex_unlock(&idev->mc_lock);
|
|
}
|
|
|
|
static void mld_dad_work(struct work_struct *work)
|
|
{
|
|
struct inet6_dev *idev = container_of(to_delayed_work(work),
|
|
struct inet6_dev,
|
|
mc_dad_work);
|
|
mutex_lock(&idev->mc_lock);
|
|
mld_send_initial_cr(idev);
|
|
if (idev->mc_dad_count) {
|
|
idev->mc_dad_count--;
|
|
if (idev->mc_dad_count)
|
|
mld_dad_start_work(idev,
|
|
unsolicited_report_interval(idev));
|
|
}
|
|
mutex_unlock(&idev->mc_lock);
|
|
in6_dev_put(idev);
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static int ip6_mc_del1_src(struct ifmcaddr6 *pmc, int sfmode,
|
|
const struct in6_addr *psfsrc)
|
|
{
|
|
struct ip6_sf_list *psf, *psf_prev;
|
|
int rv = 0;
|
|
|
|
psf_prev = NULL;
|
|
for_each_psf_mclock(pmc, psf) {
|
|
if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
|
|
break;
|
|
psf_prev = psf;
|
|
}
|
|
if (!psf || psf->sf_count[sfmode] == 0) {
|
|
/* source filter not found, or count wrong => bug */
|
|
return -ESRCH;
|
|
}
|
|
psf->sf_count[sfmode]--;
|
|
if (!psf->sf_count[MCAST_INCLUDE] && !psf->sf_count[MCAST_EXCLUDE]) {
|
|
struct inet6_dev *idev = pmc->idev;
|
|
|
|
/* no more filters for this source */
|
|
if (psf_prev)
|
|
rcu_assign_pointer(psf_prev->sf_next,
|
|
mc_dereference(psf->sf_next, idev));
|
|
else
|
|
rcu_assign_pointer(pmc->mca_sources,
|
|
mc_dereference(psf->sf_next, idev));
|
|
|
|
if (psf->sf_oldin && !(pmc->mca_flags & MAF_NOREPORT) &&
|
|
!mld_in_v1_mode(idev)) {
|
|
psf->sf_crcount = idev->mc_qrv;
|
|
rcu_assign_pointer(psf->sf_next,
|
|
mc_dereference(pmc->mca_tomb, idev));
|
|
rcu_assign_pointer(pmc->mca_tomb, psf);
|
|
rv = 1;
|
|
} else {
|
|
kfree_rcu(psf, rcu);
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static int ip6_mc_del_src(struct inet6_dev *idev, const struct in6_addr *pmca,
|
|
int sfmode, int sfcount, const struct in6_addr *psfsrc,
|
|
int delta)
|
|
{
|
|
struct ifmcaddr6 *pmc;
|
|
int changerec = 0;
|
|
int i, err;
|
|
|
|
if (!idev)
|
|
return -ENODEV;
|
|
|
|
for_each_mc_mclock(idev, pmc) {
|
|
if (ipv6_addr_equal(pmca, &pmc->mca_addr))
|
|
break;
|
|
}
|
|
if (!pmc)
|
|
return -ESRCH;
|
|
|
|
sf_markstate(pmc);
|
|
if (!delta) {
|
|
if (!pmc->mca_sfcount[sfmode])
|
|
return -EINVAL;
|
|
|
|
pmc->mca_sfcount[sfmode]--;
|
|
}
|
|
err = 0;
|
|
for (i = 0; i < sfcount; i++) {
|
|
int rv = ip6_mc_del1_src(pmc, sfmode, &psfsrc[i]);
|
|
|
|
changerec |= rv > 0;
|
|
if (!err && rv < 0)
|
|
err = rv;
|
|
}
|
|
if (pmc->mca_sfmode == MCAST_EXCLUDE &&
|
|
pmc->mca_sfcount[MCAST_EXCLUDE] == 0 &&
|
|
pmc->mca_sfcount[MCAST_INCLUDE]) {
|
|
struct ip6_sf_list *psf;
|
|
|
|
/* filter mode change */
|
|
pmc->mca_sfmode = MCAST_INCLUDE;
|
|
pmc->mca_crcount = idev->mc_qrv;
|
|
idev->mc_ifc_count = pmc->mca_crcount;
|
|
for_each_psf_mclock(pmc, psf)
|
|
psf->sf_crcount = 0;
|
|
mld_ifc_event(pmc->idev);
|
|
} else if (sf_setstate(pmc) || changerec) {
|
|
mld_ifc_event(pmc->idev);
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
/*
|
|
* Add multicast single-source filter to the interface list
|
|
* called with mc_lock
|
|
*/
|
|
static int ip6_mc_add1_src(struct ifmcaddr6 *pmc, int sfmode,
|
|
const struct in6_addr *psfsrc)
|
|
{
|
|
struct ip6_sf_list *psf, *psf_prev;
|
|
|
|
psf_prev = NULL;
|
|
for_each_psf_mclock(pmc, psf) {
|
|
if (ipv6_addr_equal(&psf->sf_addr, psfsrc))
|
|
break;
|
|
psf_prev = psf;
|
|
}
|
|
if (!psf) {
|
|
psf = kzalloc(sizeof(*psf), GFP_KERNEL);
|
|
if (!psf)
|
|
return -ENOBUFS;
|
|
|
|
psf->sf_addr = *psfsrc;
|
|
if (psf_prev) {
|
|
rcu_assign_pointer(psf_prev->sf_next, psf);
|
|
} else {
|
|
rcu_assign_pointer(pmc->mca_sources, psf);
|
|
}
|
|
}
|
|
psf->sf_count[sfmode]++;
|
|
return 0;
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static void sf_markstate(struct ifmcaddr6 *pmc)
|
|
{
|
|
struct ip6_sf_list *psf;
|
|
int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
|
|
|
|
for_each_psf_mclock(pmc, psf) {
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
|
|
psf->sf_oldin = mca_xcount ==
|
|
psf->sf_count[MCAST_EXCLUDE] &&
|
|
!psf->sf_count[MCAST_INCLUDE];
|
|
} else {
|
|
psf->sf_oldin = psf->sf_count[MCAST_INCLUDE] != 0;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static int sf_setstate(struct ifmcaddr6 *pmc)
|
|
{
|
|
struct ip6_sf_list *psf, *dpsf;
|
|
int mca_xcount = pmc->mca_sfcount[MCAST_EXCLUDE];
|
|
int qrv = pmc->idev->mc_qrv;
|
|
int new_in, rv;
|
|
|
|
rv = 0;
|
|
for_each_psf_mclock(pmc, psf) {
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE]) {
|
|
new_in = mca_xcount == psf->sf_count[MCAST_EXCLUDE] &&
|
|
!psf->sf_count[MCAST_INCLUDE];
|
|
} else
|
|
new_in = psf->sf_count[MCAST_INCLUDE] != 0;
|
|
if (new_in) {
|
|
if (!psf->sf_oldin) {
|
|
struct ip6_sf_list *prev = NULL;
|
|
|
|
for_each_psf_tomb(pmc, dpsf) {
|
|
if (ipv6_addr_equal(&dpsf->sf_addr,
|
|
&psf->sf_addr))
|
|
break;
|
|
prev = dpsf;
|
|
}
|
|
if (dpsf) {
|
|
if (prev)
|
|
rcu_assign_pointer(prev->sf_next,
|
|
mc_dereference(dpsf->sf_next,
|
|
pmc->idev));
|
|
else
|
|
rcu_assign_pointer(pmc->mca_tomb,
|
|
mc_dereference(dpsf->sf_next,
|
|
pmc->idev));
|
|
kfree_rcu(dpsf, rcu);
|
|
}
|
|
psf->sf_crcount = qrv;
|
|
rv++;
|
|
}
|
|
} else if (psf->sf_oldin) {
|
|
psf->sf_crcount = 0;
|
|
/*
|
|
* add or update "delete" records if an active filter
|
|
* is now inactive
|
|
*/
|
|
|
|
for_each_psf_tomb(pmc, dpsf)
|
|
if (ipv6_addr_equal(&dpsf->sf_addr,
|
|
&psf->sf_addr))
|
|
break;
|
|
if (!dpsf) {
|
|
dpsf = kmalloc(sizeof(*dpsf), GFP_KERNEL);
|
|
if (!dpsf)
|
|
continue;
|
|
*dpsf = *psf;
|
|
rcu_assign_pointer(dpsf->sf_next,
|
|
mc_dereference(pmc->mca_tomb, pmc->idev));
|
|
rcu_assign_pointer(pmc->mca_tomb, dpsf);
|
|
}
|
|
dpsf->sf_crcount = qrv;
|
|
rv++;
|
|
}
|
|
}
|
|
return rv;
|
|
}
|
|
|
|
/*
|
|
* Add multicast source filter list to the interface list
|
|
* called with mc_lock
|
|
*/
|
|
static int ip6_mc_add_src(struct inet6_dev *idev, const struct in6_addr *pmca,
|
|
int sfmode, int sfcount, const struct in6_addr *psfsrc,
|
|
int delta)
|
|
{
|
|
struct ifmcaddr6 *pmc;
|
|
int isexclude;
|
|
int i, err;
|
|
|
|
if (!idev)
|
|
return -ENODEV;
|
|
|
|
for_each_mc_mclock(idev, pmc) {
|
|
if (ipv6_addr_equal(pmca, &pmc->mca_addr))
|
|
break;
|
|
}
|
|
if (!pmc)
|
|
return -ESRCH;
|
|
|
|
sf_markstate(pmc);
|
|
isexclude = pmc->mca_sfmode == MCAST_EXCLUDE;
|
|
if (!delta)
|
|
pmc->mca_sfcount[sfmode]++;
|
|
err = 0;
|
|
for (i = 0; i < sfcount; i++) {
|
|
err = ip6_mc_add1_src(pmc, sfmode, &psfsrc[i]);
|
|
if (err)
|
|
break;
|
|
}
|
|
if (err) {
|
|
int j;
|
|
|
|
if (!delta)
|
|
pmc->mca_sfcount[sfmode]--;
|
|
for (j = 0; j < i; j++)
|
|
ip6_mc_del1_src(pmc, sfmode, &psfsrc[j]);
|
|
} else if (isexclude != (pmc->mca_sfcount[MCAST_EXCLUDE] != 0)) {
|
|
struct ip6_sf_list *psf;
|
|
|
|
/* filter mode change */
|
|
if (pmc->mca_sfcount[MCAST_EXCLUDE])
|
|
pmc->mca_sfmode = MCAST_EXCLUDE;
|
|
else if (pmc->mca_sfcount[MCAST_INCLUDE])
|
|
pmc->mca_sfmode = MCAST_INCLUDE;
|
|
/* else no filters; keep old mode for reports */
|
|
|
|
pmc->mca_crcount = idev->mc_qrv;
|
|
idev->mc_ifc_count = pmc->mca_crcount;
|
|
for_each_psf_mclock(pmc, psf)
|
|
psf->sf_crcount = 0;
|
|
mld_ifc_event(idev);
|
|
} else if (sf_setstate(pmc)) {
|
|
mld_ifc_event(idev);
|
|
}
|
|
return err;
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static void ip6_mc_clear_src(struct ifmcaddr6 *pmc)
|
|
{
|
|
struct ip6_sf_list *psf, *nextpsf;
|
|
|
|
for (psf = mc_dereference(pmc->mca_tomb, pmc->idev);
|
|
psf;
|
|
psf = nextpsf) {
|
|
nextpsf = mc_dereference(psf->sf_next, pmc->idev);
|
|
kfree_rcu(psf, rcu);
|
|
}
|
|
RCU_INIT_POINTER(pmc->mca_tomb, NULL);
|
|
for (psf = mc_dereference(pmc->mca_sources, pmc->idev);
|
|
psf;
|
|
psf = nextpsf) {
|
|
nextpsf = mc_dereference(psf->sf_next, pmc->idev);
|
|
kfree_rcu(psf, rcu);
|
|
}
|
|
RCU_INIT_POINTER(pmc->mca_sources, NULL);
|
|
pmc->mca_sfmode = MCAST_EXCLUDE;
|
|
pmc->mca_sfcount[MCAST_INCLUDE] = 0;
|
|
pmc->mca_sfcount[MCAST_EXCLUDE] = 1;
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static void igmp6_join_group(struct ifmcaddr6 *ma)
|
|
{
|
|
unsigned long delay;
|
|
|
|
if (ma->mca_flags & MAF_NOREPORT)
|
|
return;
|
|
|
|
igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
|
|
|
|
delay = prandom_u32() % unsolicited_report_interval(ma->idev);
|
|
|
|
if (cancel_delayed_work(&ma->mca_work)) {
|
|
refcount_dec(&ma->mca_refcnt);
|
|
delay = ma->mca_work.timer.expires - jiffies;
|
|
}
|
|
|
|
if (!mod_delayed_work(mld_wq, &ma->mca_work, delay))
|
|
refcount_inc(&ma->mca_refcnt);
|
|
ma->mca_flags |= MAF_TIMER_RUNNING | MAF_LAST_REPORTER;
|
|
}
|
|
|
|
static int ip6_mc_leave_src(struct sock *sk, struct ipv6_mc_socklist *iml,
|
|
struct inet6_dev *idev)
|
|
{
|
|
struct ip6_sf_socklist *psl;
|
|
int err;
|
|
|
|
psl = sock_dereference(iml->sflist, sk);
|
|
|
|
if (idev)
|
|
mutex_lock(&idev->mc_lock);
|
|
|
|
if (!psl) {
|
|
/* any-source empty exclude case */
|
|
err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode, 0, NULL, 0);
|
|
} else {
|
|
err = ip6_mc_del_src(idev, &iml->addr, iml->sfmode,
|
|
psl->sl_count, psl->sl_addr, 0);
|
|
RCU_INIT_POINTER(iml->sflist, NULL);
|
|
atomic_sub(IP6_SFLSIZE(psl->sl_max), &sk->sk_omem_alloc);
|
|
kfree_rcu(psl, rcu);
|
|
}
|
|
|
|
if (idev)
|
|
mutex_unlock(&idev->mc_lock);
|
|
|
|
return err;
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static void igmp6_leave_group(struct ifmcaddr6 *ma)
|
|
{
|
|
if (mld_in_v1_mode(ma->idev)) {
|
|
if (ma->mca_flags & MAF_LAST_REPORTER) {
|
|
igmp6_send(&ma->mca_addr, ma->idev->dev,
|
|
ICMPV6_MGM_REDUCTION);
|
|
}
|
|
} else {
|
|
mld_add_delrec(ma->idev, ma);
|
|
mld_ifc_event(ma->idev);
|
|
}
|
|
}
|
|
|
|
static void mld_gq_work(struct work_struct *work)
|
|
{
|
|
struct inet6_dev *idev = container_of(to_delayed_work(work),
|
|
struct inet6_dev,
|
|
mc_gq_work);
|
|
|
|
mutex_lock(&idev->mc_lock);
|
|
mld_send_report(idev, NULL);
|
|
idev->mc_gq_running = 0;
|
|
mutex_unlock(&idev->mc_lock);
|
|
|
|
in6_dev_put(idev);
|
|
}
|
|
|
|
static void mld_ifc_work(struct work_struct *work)
|
|
{
|
|
struct inet6_dev *idev = container_of(to_delayed_work(work),
|
|
struct inet6_dev,
|
|
mc_ifc_work);
|
|
|
|
mutex_lock(&idev->mc_lock);
|
|
mld_send_cr(idev);
|
|
|
|
if (idev->mc_ifc_count) {
|
|
idev->mc_ifc_count--;
|
|
if (idev->mc_ifc_count)
|
|
mld_ifc_start_work(idev,
|
|
unsolicited_report_interval(idev));
|
|
}
|
|
mutex_unlock(&idev->mc_lock);
|
|
in6_dev_put(idev);
|
|
}
|
|
|
|
/* called with mc_lock */
|
|
static void mld_ifc_event(struct inet6_dev *idev)
|
|
{
|
|
if (mld_in_v1_mode(idev))
|
|
return;
|
|
|
|
idev->mc_ifc_count = idev->mc_qrv;
|
|
mld_ifc_start_work(idev, 1);
|
|
}
|
|
|
|
static void mld_mca_work(struct work_struct *work)
|
|
{
|
|
struct ifmcaddr6 *ma = container_of(to_delayed_work(work),
|
|
struct ifmcaddr6, mca_work);
|
|
|
|
mutex_lock(&ma->idev->mc_lock);
|
|
if (mld_in_v1_mode(ma->idev))
|
|
igmp6_send(&ma->mca_addr, ma->idev->dev, ICMPV6_MGM_REPORT);
|
|
else
|
|
mld_send_report(ma->idev, ma);
|
|
ma->mca_flags |= MAF_LAST_REPORTER;
|
|
ma->mca_flags &= ~MAF_TIMER_RUNNING;
|
|
mutex_unlock(&ma->idev->mc_lock);
|
|
|
|
ma_put(ma);
|
|
}
|
|
|
|
/* Device changing type */
|
|
|
|
void ipv6_mc_unmap(struct inet6_dev *idev)
|
|
{
|
|
struct ifmcaddr6 *i;
|
|
|
|
/* Install multicast list, except for all-nodes (already installed) */
|
|
|
|
mutex_lock(&idev->mc_lock);
|
|
for_each_mc_mclock(idev, i)
|
|
igmp6_group_dropped(i);
|
|
mutex_unlock(&idev->mc_lock);
|
|
}
|
|
|
|
void ipv6_mc_remap(struct inet6_dev *idev)
|
|
{
|
|
ipv6_mc_up(idev);
|
|
}
|
|
|
|
/* Device going down */
|
|
void ipv6_mc_down(struct inet6_dev *idev)
|
|
{
|
|
struct ifmcaddr6 *i;
|
|
|
|
mutex_lock(&idev->mc_lock);
|
|
/* Withdraw multicast list */
|
|
for_each_mc_mclock(idev, i)
|
|
igmp6_group_dropped(i);
|
|
mutex_unlock(&idev->mc_lock);
|
|
|
|
/* Should stop work after group drop. or we will
|
|
* start work again in mld_ifc_event()
|
|
*/
|
|
synchronize_net();
|
|
mld_query_stop_work(idev);
|
|
mld_report_stop_work(idev);
|
|
mld_ifc_stop_work(idev);
|
|
mld_gq_stop_work(idev);
|
|
mld_dad_stop_work(idev);
|
|
}
|
|
|
|
static void ipv6_mc_reset(struct inet6_dev *idev)
|
|
{
|
|
idev->mc_qrv = sysctl_mld_qrv;
|
|
idev->mc_qi = MLD_QI_DEFAULT;
|
|
idev->mc_qri = MLD_QRI_DEFAULT;
|
|
idev->mc_v1_seen = 0;
|
|
idev->mc_maxdelay = unsolicited_report_interval(idev);
|
|
}
|
|
|
|
/* Device going up */
|
|
|
|
void ipv6_mc_up(struct inet6_dev *idev)
|
|
{
|
|
struct ifmcaddr6 *i;
|
|
|
|
/* Install multicast list, except for all-nodes (already installed) */
|
|
|
|
ipv6_mc_reset(idev);
|
|
mutex_lock(&idev->mc_lock);
|
|
for_each_mc_mclock(idev, i) {
|
|
mld_del_delrec(idev, i);
|
|
igmp6_group_added(i);
|
|
}
|
|
mutex_unlock(&idev->mc_lock);
|
|
}
|
|
|
|
/* IPv6 device initialization. */
|
|
|
|
void ipv6_mc_init_dev(struct inet6_dev *idev)
|
|
{
|
|
idev->mc_gq_running = 0;
|
|
INIT_DELAYED_WORK(&idev->mc_gq_work, mld_gq_work);
|
|
RCU_INIT_POINTER(idev->mc_tomb, NULL);
|
|
idev->mc_ifc_count = 0;
|
|
INIT_DELAYED_WORK(&idev->mc_ifc_work, mld_ifc_work);
|
|
INIT_DELAYED_WORK(&idev->mc_dad_work, mld_dad_work);
|
|
INIT_DELAYED_WORK(&idev->mc_query_work, mld_query_work);
|
|
INIT_DELAYED_WORK(&idev->mc_report_work, mld_report_work);
|
|
skb_queue_head_init(&idev->mc_query_queue);
|
|
skb_queue_head_init(&idev->mc_report_queue);
|
|
spin_lock_init(&idev->mc_query_lock);
|
|
spin_lock_init(&idev->mc_report_lock);
|
|
mutex_init(&idev->mc_lock);
|
|
ipv6_mc_reset(idev);
|
|
}
|
|
|
|
/*
|
|
* Device is about to be destroyed: clean up.
|
|
*/
|
|
|
|
void ipv6_mc_destroy_dev(struct inet6_dev *idev)
|
|
{
|
|
struct ifmcaddr6 *i;
|
|
|
|
/* Deactivate works */
|
|
ipv6_mc_down(idev);
|
|
mutex_lock(&idev->mc_lock);
|
|
mld_clear_delrec(idev);
|
|
mutex_unlock(&idev->mc_lock);
|
|
mld_clear_query(idev);
|
|
mld_clear_report(idev);
|
|
|
|
/* Delete all-nodes address. */
|
|
/* We cannot call ipv6_dev_mc_dec() directly, our caller in
|
|
* addrconf.c has NULL'd out dev->ip6_ptr so in6_dev_get() will
|
|
* fail.
|
|
*/
|
|
__ipv6_dev_mc_dec(idev, &in6addr_linklocal_allnodes);
|
|
|
|
if (idev->cnf.forwarding)
|
|
__ipv6_dev_mc_dec(idev, &in6addr_linklocal_allrouters);
|
|
|
|
mutex_lock(&idev->mc_lock);
|
|
while ((i = mc_dereference(idev->mc_list, idev))) {
|
|
rcu_assign_pointer(idev->mc_list, mc_dereference(i->next, idev));
|
|
|
|
ip6_mc_clear_src(i);
|
|
ma_put(i);
|
|
}
|
|
mutex_unlock(&idev->mc_lock);
|
|
}
|
|
|
|
static void ipv6_mc_rejoin_groups(struct inet6_dev *idev)
|
|
{
|
|
struct ifmcaddr6 *pmc;
|
|
|
|
ASSERT_RTNL();
|
|
|
|
mutex_lock(&idev->mc_lock);
|
|
if (mld_in_v1_mode(idev)) {
|
|
for_each_mc_mclock(idev, pmc)
|
|
igmp6_join_group(pmc);
|
|
} else {
|
|
mld_send_report(idev, NULL);
|
|
}
|
|
mutex_unlock(&idev->mc_lock);
|
|
}
|
|
|
|
static int ipv6_mc_netdev_event(struct notifier_block *this,
|
|
unsigned long event,
|
|
void *ptr)
|
|
{
|
|
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
|
|
struct inet6_dev *idev = __in6_dev_get(dev);
|
|
|
|
switch (event) {
|
|
case NETDEV_RESEND_IGMP:
|
|
if (idev)
|
|
ipv6_mc_rejoin_groups(idev);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return NOTIFY_DONE;
|
|
}
|
|
|
|
static struct notifier_block igmp6_netdev_notifier = {
|
|
.notifier_call = ipv6_mc_netdev_event,
|
|
};
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
struct igmp6_mc_iter_state {
|
|
struct seq_net_private p;
|
|
struct net_device *dev;
|
|
struct inet6_dev *idev;
|
|
};
|
|
|
|
#define igmp6_mc_seq_private(seq) ((struct igmp6_mc_iter_state *)(seq)->private)
|
|
|
|
static inline struct ifmcaddr6 *igmp6_mc_get_first(struct seq_file *seq)
|
|
{
|
|
struct ifmcaddr6 *im = NULL;
|
|
struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
|
|
struct net *net = seq_file_net(seq);
|
|
|
|
state->idev = NULL;
|
|
for_each_netdev_rcu(net, state->dev) {
|
|
struct inet6_dev *idev;
|
|
idev = __in6_dev_get(state->dev);
|
|
if (!idev)
|
|
continue;
|
|
|
|
im = rcu_dereference(idev->mc_list);
|
|
if (im) {
|
|
state->idev = idev;
|
|
break;
|
|
}
|
|
}
|
|
return im;
|
|
}
|
|
|
|
static struct ifmcaddr6 *igmp6_mc_get_next(struct seq_file *seq, struct ifmcaddr6 *im)
|
|
{
|
|
struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
|
|
|
|
im = rcu_dereference(im->next);
|
|
while (!im) {
|
|
state->dev = next_net_device_rcu(state->dev);
|
|
if (!state->dev) {
|
|
state->idev = NULL;
|
|
break;
|
|
}
|
|
state->idev = __in6_dev_get(state->dev);
|
|
if (!state->idev)
|
|
continue;
|
|
im = rcu_dereference(state->idev->mc_list);
|
|
}
|
|
return im;
|
|
}
|
|
|
|
static struct ifmcaddr6 *igmp6_mc_get_idx(struct seq_file *seq, loff_t pos)
|
|
{
|
|
struct ifmcaddr6 *im = igmp6_mc_get_first(seq);
|
|
if (im)
|
|
while (pos && (im = igmp6_mc_get_next(seq, im)) != NULL)
|
|
--pos;
|
|
return pos ? NULL : im;
|
|
}
|
|
|
|
static void *igmp6_mc_seq_start(struct seq_file *seq, loff_t *pos)
|
|
__acquires(RCU)
|
|
{
|
|
rcu_read_lock();
|
|
return igmp6_mc_get_idx(seq, *pos);
|
|
}
|
|
|
|
static void *igmp6_mc_seq_next(struct seq_file *seq, void *v, loff_t *pos)
|
|
{
|
|
struct ifmcaddr6 *im = igmp6_mc_get_next(seq, v);
|
|
|
|
++*pos;
|
|
return im;
|
|
}
|
|
|
|
static void igmp6_mc_seq_stop(struct seq_file *seq, void *v)
|
|
__releases(RCU)
|
|
{
|
|
struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
|
|
|
|
if (likely(state->idev))
|
|
state->idev = NULL;
|
|
state->dev = NULL;
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static int igmp6_mc_seq_show(struct seq_file *seq, void *v)
|
|
{
|
|
struct ifmcaddr6 *im = (struct ifmcaddr6 *)v;
|
|
struct igmp6_mc_iter_state *state = igmp6_mc_seq_private(seq);
|
|
|
|
seq_printf(seq,
|
|
"%-4d %-15s %pi6 %5d %08X %ld\n",
|
|
state->dev->ifindex, state->dev->name,
|
|
&im->mca_addr,
|
|
im->mca_users, im->mca_flags,
|
|
(im->mca_flags & MAF_TIMER_RUNNING) ?
|
|
jiffies_to_clock_t(im->mca_work.timer.expires - jiffies) : 0);
|
|
return 0;
|
|
}
|
|
|
|
static const struct seq_operations igmp6_mc_seq_ops = {
|
|
.start = igmp6_mc_seq_start,
|
|
.next = igmp6_mc_seq_next,
|
|
.stop = igmp6_mc_seq_stop,
|
|
.show = igmp6_mc_seq_show,
|
|
};
|
|
|
|
struct igmp6_mcf_iter_state {
|
|
struct seq_net_private p;
|
|
struct net_device *dev;
|
|
struct inet6_dev *idev;
|
|
struct ifmcaddr6 *im;
|
|
};
|
|
|
|
#define igmp6_mcf_seq_private(seq) ((struct igmp6_mcf_iter_state *)(seq)->private)
|
|
|
|
static inline struct ip6_sf_list *igmp6_mcf_get_first(struct seq_file *seq)
|
|
{
|
|
struct ip6_sf_list *psf = NULL;
|
|
struct ifmcaddr6 *im = NULL;
|
|
struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
|
|
struct net *net = seq_file_net(seq);
|
|
|
|
state->idev = NULL;
|
|
state->im = NULL;
|
|
for_each_netdev_rcu(net, state->dev) {
|
|
struct inet6_dev *idev;
|
|
idev = __in6_dev_get(state->dev);
|
|
if (unlikely(idev == NULL))
|
|
continue;
|
|
|
|
im = rcu_dereference(idev->mc_list);
|
|
if (likely(im)) {
|
|
psf = rcu_dereference(im->mca_sources);
|
|
if (likely(psf)) {
|
|
state->im = im;
|
|
state->idev = idev;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
return psf;
|
|
}
|
|
|
|
static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_sf_list *psf)
|
|
{
|
|
struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
|
|
|
|
psf = rcu_dereference(psf->sf_next);
|
|
while (!psf) {
|
|
state->im = rcu_dereference(state->im->next);
|
|
while (!state->im) {
|
|
state->dev = next_net_device_rcu(state->dev);
|
|
if (!state->dev) {
|
|
state->idev = NULL;
|
|
goto out;
|
|
}
|
|
state->idev = __in6_dev_get(state->dev);
|
|
if (!state->idev)
|
|
continue;
|
|
state->im = rcu_dereference(state->idev->mc_list);
|
|
}
|
|
if (!state->im)
|
|
break;
|
|
psf = rcu_dereference(state->im->mca_sources);
|
|
}
|
|
out:
|
|
return psf;
|
|
}
|
|
|
|
static struct ip6_sf_list *igmp6_mcf_get_idx(struct seq_file *seq, loff_t pos)
|
|
{
|
|
struct ip6_sf_list *psf = igmp6_mcf_get_first(seq);
|
|
if (psf)
|
|
while (pos && (psf = igmp6_mcf_get_next(seq, psf)) != NULL)
|
|
--pos;
|
|
return pos ? NULL : psf;
|
|
}
|
|
|
|
static void *igmp6_mcf_seq_start(struct seq_file *seq, loff_t *pos)
|
|
__acquires(RCU)
|
|
{
|
|
rcu_read_lock();
|
|
return *pos ? igmp6_mcf_get_idx(seq, *pos - 1) : SEQ_START_TOKEN;
|
|
}
|
|
|
|
static void *igmp6_mcf_seq_next(struct seq_file *seq, void *v, loff_t *pos)
|
|
{
|
|
struct ip6_sf_list *psf;
|
|
if (v == SEQ_START_TOKEN)
|
|
psf = igmp6_mcf_get_first(seq);
|
|
else
|
|
psf = igmp6_mcf_get_next(seq, v);
|
|
++*pos;
|
|
return psf;
|
|
}
|
|
|
|
static void igmp6_mcf_seq_stop(struct seq_file *seq, void *v)
|
|
__releases(RCU)
|
|
{
|
|
struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
|
|
|
|
if (likely(state->im))
|
|
state->im = NULL;
|
|
if (likely(state->idev))
|
|
state->idev = NULL;
|
|
|
|
state->dev = NULL;
|
|
rcu_read_unlock();
|
|
}
|
|
|
|
static int igmp6_mcf_seq_show(struct seq_file *seq, void *v)
|
|
{
|
|
struct ip6_sf_list *psf = (struct ip6_sf_list *)v;
|
|
struct igmp6_mcf_iter_state *state = igmp6_mcf_seq_private(seq);
|
|
|
|
if (v == SEQ_START_TOKEN) {
|
|
seq_puts(seq, "Idx Device Multicast Address Source Address INC EXC\n");
|
|
} else {
|
|
seq_printf(seq,
|
|
"%3d %6.6s %pi6 %pi6 %6lu %6lu\n",
|
|
state->dev->ifindex, state->dev->name,
|
|
&state->im->mca_addr,
|
|
&psf->sf_addr,
|
|
psf->sf_count[MCAST_INCLUDE],
|
|
psf->sf_count[MCAST_EXCLUDE]);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static const struct seq_operations igmp6_mcf_seq_ops = {
|
|
.start = igmp6_mcf_seq_start,
|
|
.next = igmp6_mcf_seq_next,
|
|
.stop = igmp6_mcf_seq_stop,
|
|
.show = igmp6_mcf_seq_show,
|
|
};
|
|
|
|
static int __net_init igmp6_proc_init(struct net *net)
|
|
{
|
|
int err;
|
|
|
|
err = -ENOMEM;
|
|
if (!proc_create_net("igmp6", 0444, net->proc_net, &igmp6_mc_seq_ops,
|
|
sizeof(struct igmp6_mc_iter_state)))
|
|
goto out;
|
|
if (!proc_create_net("mcfilter6", 0444, net->proc_net,
|
|
&igmp6_mcf_seq_ops,
|
|
sizeof(struct igmp6_mcf_iter_state)))
|
|
goto out_proc_net_igmp6;
|
|
|
|
err = 0;
|
|
out:
|
|
return err;
|
|
|
|
out_proc_net_igmp6:
|
|
remove_proc_entry("igmp6", net->proc_net);
|
|
goto out;
|
|
}
|
|
|
|
static void __net_exit igmp6_proc_exit(struct net *net)
|
|
{
|
|
remove_proc_entry("mcfilter6", net->proc_net);
|
|
remove_proc_entry("igmp6", net->proc_net);
|
|
}
|
|
#else
|
|
static inline int igmp6_proc_init(struct net *net)
|
|
{
|
|
return 0;
|
|
}
|
|
static inline void igmp6_proc_exit(struct net *net)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static int __net_init igmp6_net_init(struct net *net)
|
|
{
|
|
int err;
|
|
|
|
err = inet_ctl_sock_create(&net->ipv6.igmp_sk, PF_INET6,
|
|
SOCK_RAW, IPPROTO_ICMPV6, net);
|
|
if (err < 0) {
|
|
pr_err("Failed to initialize the IGMP6 control socket (err %d)\n",
|
|
err);
|
|
goto out;
|
|
}
|
|
|
|
inet6_sk(net->ipv6.igmp_sk)->hop_limit = 1;
|
|
net->ipv6.igmp_sk->sk_allocation = GFP_KERNEL;
|
|
|
|
err = inet_ctl_sock_create(&net->ipv6.mc_autojoin_sk, PF_INET6,
|
|
SOCK_RAW, IPPROTO_ICMPV6, net);
|
|
if (err < 0) {
|
|
pr_err("Failed to initialize the IGMP6 autojoin socket (err %d)\n",
|
|
err);
|
|
goto out_sock_create;
|
|
}
|
|
|
|
err = igmp6_proc_init(net);
|
|
if (err)
|
|
goto out_sock_create_autojoin;
|
|
|
|
return 0;
|
|
|
|
out_sock_create_autojoin:
|
|
inet_ctl_sock_destroy(net->ipv6.mc_autojoin_sk);
|
|
out_sock_create:
|
|
inet_ctl_sock_destroy(net->ipv6.igmp_sk);
|
|
out:
|
|
return err;
|
|
}
|
|
|
|
static void __net_exit igmp6_net_exit(struct net *net)
|
|
{
|
|
inet_ctl_sock_destroy(net->ipv6.igmp_sk);
|
|
inet_ctl_sock_destroy(net->ipv6.mc_autojoin_sk);
|
|
igmp6_proc_exit(net);
|
|
}
|
|
|
|
static struct pernet_operations igmp6_net_ops = {
|
|
.init = igmp6_net_init,
|
|
.exit = igmp6_net_exit,
|
|
};
|
|
|
|
int __init igmp6_init(void)
|
|
{
|
|
int err;
|
|
|
|
err = register_pernet_subsys(&igmp6_net_ops);
|
|
if (err)
|
|
return err;
|
|
|
|
mld_wq = create_workqueue("mld");
|
|
if (!mld_wq) {
|
|
unregister_pernet_subsys(&igmp6_net_ops);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
int __init igmp6_late_init(void)
|
|
{
|
|
return register_netdevice_notifier(&igmp6_netdev_notifier);
|
|
}
|
|
|
|
void igmp6_cleanup(void)
|
|
{
|
|
unregister_pernet_subsys(&igmp6_net_ops);
|
|
destroy_workqueue(mld_wq);
|
|
}
|
|
|
|
void igmp6_late_cleanup(void)
|
|
{
|
|
unregister_netdevice_notifier(&igmp6_netdev_notifier);
|
|
}
|