cregit-Linux how code gets into the kernel

Release 4.11 net/ipv6/ip6mr.c

Directory: net/ipv6
/*
 *      Linux IPv6 multicast routing support for BSD pim6sd
 *      Based on net/ipv4/ipmr.c.
 *
 *      (c) 2004 Mickael Hoerdt, <hoerdt@clarinet.u-strasbg.fr>
 *              LSIIT Laboratory, Strasbourg, France
 *      (c) 2004 Jean-Philippe Andriot, <jean-philippe.andriot@6WIND.com>
 *              6WIND, Paris, France
 *      Copyright (C)2007,2008 USAGI/WIDE Project
 *              YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
 *
 *      This program is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU General Public License
 *      as published by the Free Software Foundation; either version
 *      2 of the License, or (at your option) any later version.
 *
 */

#include <linux/uaccess.h>
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/errno.h>
#include <linux/timer.h>
#include <linux/mm.h>
#include <linux/kernel.h>
#include <linux/fcntl.h>
#include <linux/stat.h>
#include <linux/socket.h>
#include <linux/inet.h>
#include <linux/netdevice.h>
#include <linux/inetdevice.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/compat.h>
#include <net/protocol.h>
#include <linux/skbuff.h>
#include <net/sock.h>
#include <net/raw.h>
#include <linux/notifier.h>
#include <linux/if_arp.h>
#include <net/checksum.h>
#include <net/netlink.h>
#include <net/fib_rules.h>

#include <net/ipv6.h>
#include <net/ip6_route.h>
#include <linux/mroute6.h>
#include <linux/pim.h>
#include <net/addrconf.h>
#include <linux/netfilter_ipv6.h>
#include <linux/export.h>
#include <net/ip6_checksum.h>
#include <linux/netconf.h>


struct mr6_table {
	
struct list_head	list;
	
possible_net_t		net;
	
u32			id;
	
struct sock		*mroute6_sk;
	
struct timer_list	ipmr_expire_timer;
	
struct list_head	mfc6_unres_queue;
	
struct list_head	mfc6_cache_array[MFC6_LINES];
	
struct mif_device	vif6_table[MAXMIFS];
	
int			maxvif;
	
atomic_t		cache_resolve_queue_len;
	
bool			mroute_do_assert;
	
bool			mroute_do_pim;
#ifdef CONFIG_IPV6_PIMSM_V2
	
int			mroute_reg_vif_num;
#endif
};


struct ip6mr_rule {
	
struct fib_rule		common;
};


struct ip6mr_result {
	
struct mr6_table	*mrt;
};

/* Big lock, protecting vif table, mrt cache and mroute socket state.
   Note that the changes are semaphored via rtnl_lock.
 */

static DEFINE_RWLOCK(mrt_lock);

/*
 *      Multicast router control variables
 */


#define MIF_EXISTS(_mrt, _idx) ((_mrt)->vif6_table[_idx].dev != NULL)

/* Special spinlock for queue of unresolved entries */
static DEFINE_SPINLOCK(mfc_unres_lock);

/* We return to original Alan's scheme. Hash table of resolved
   entries is changed only in process context and protected
   with weak lock mrt_lock. Queue of unresolved entries is protected
   with strong spinlock mfc_unres_lock.

   In this case data path is free of exclusive locks at all.
 */


static struct kmem_cache *mrt_cachep __read_mostly;

static struct mr6_table *ip6mr_new_table(struct net *net, u32 id);
static void ip6mr_free_table(struct mr6_table *mrt);

static void ip6_mr_forward(struct net *net, struct mr6_table *mrt,
			   struct sk_buff *skb, struct mfc6_cache *cache);
static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt,
			      mifi_t mifi, int assert);
static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb,
			       struct mfc6_cache *c, struct rtmsg *rtm);
static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc,
			      int cmd);
static int ip6mr_rtm_dumproute(struct sk_buff *skb,
			       struct netlink_callback *cb);
static void mroute_clean_tables(struct mr6_table *mrt, bool all);
static void ipmr_expire_process(unsigned long arg);

#ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES

#define ip6mr_for_each_table(mrt, net) \
	list_for_each_entry_rcu(mrt, &net->ipv6.mr6_tables, list)


static struct mr6_table *ip6mr_get_table(struct net *net, u32 id) { struct mr6_table *mrt; ip6mr_for_each_table(mrt, net) { if (mrt->id == id) return mrt; } return NULL; }

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static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6, struct mr6_table **mrt) { int err; struct ip6mr_result res; struct fib_lookup_arg arg = { .result = &res, .flags = FIB_LOOKUP_NOREF, }; err = fib_rules_lookup(net->ipv6.mr6_rules_ops, flowi6_to_flowi(flp6), 0, &arg); if (err < 0) return err; *mrt = res.mrt; return 0; }

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static int ip6mr_rule_action(struct fib_rule *rule, struct flowi *flp, int flags, struct fib_lookup_arg *arg) { struct ip6mr_result *res = arg->result; struct mr6_table *mrt; switch (rule->action) { case FR_ACT_TO_TBL: break; case FR_ACT_UNREACHABLE: return -ENETUNREACH; case FR_ACT_PROHIBIT: return -EACCES; case FR_ACT_BLACKHOLE: default: return -EINVAL; } mrt = ip6mr_get_table(rule->fr_net, rule->table); if (!mrt) return -EAGAIN; res->mrt = mrt; return 0; }

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static int ip6mr_rule_match(struct fib_rule *rule, struct flowi *flp, int flags) { return 1; }

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static const struct nla_policy ip6mr_rule_policy[FRA_MAX + 1] = { FRA_GENERIC_POLICY, };
static int ip6mr_rule_configure(struct fib_rule *rule, struct sk_buff *skb, struct fib_rule_hdr *frh, struct nlattr **tb) { return 0; }

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static int ip6mr_rule_compare(struct fib_rule *rule, struct fib_rule_hdr *frh, struct nlattr **tb) { return 1; }

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static int ip6mr_rule_fill(struct fib_rule *rule, struct sk_buff *skb, struct fib_rule_hdr *frh) { frh->dst_len = 0; frh->src_len = 0; frh->tos = 0; return 0; }

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static const struct fib_rules_ops __net_initconst ip6mr_rules_ops_template = { .family = RTNL_FAMILY_IP6MR, .rule_size = sizeof(struct ip6mr_rule), .addr_size = sizeof(struct in6_addr), .action = ip6mr_rule_action, .match = ip6mr_rule_match, .configure = ip6mr_rule_configure, .compare = ip6mr_rule_compare, .fill = ip6mr_rule_fill, .nlgroup = RTNLGRP_IPV6_RULE, .policy = ip6mr_rule_policy, .owner = THIS_MODULE, };
static int __net_init ip6mr_rules_init(struct net *net) { struct fib_rules_ops *ops; struct mr6_table *mrt; int err; ops = fib_rules_register(&ip6mr_rules_ops_template, net); if (IS_ERR(ops)) return PTR_ERR(ops); INIT_LIST_HEAD(&net->ipv6.mr6_tables); mrt = ip6mr_new_table(net, RT6_TABLE_DFLT); if (!mrt) { err = -ENOMEM; goto err1; } err = fib_default_rule_add(ops, 0x7fff, RT6_TABLE_DFLT, 0); if (err < 0) goto err2; net->ipv6.mr6_rules_ops = ops; return 0; err2: ip6mr_free_table(mrt); err1: fib_rules_unregister(ops); return err; }

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static void __net_exit ip6mr_rules_exit(struct net *net) { struct mr6_table *mrt, *next; rtnl_lock(); list_for_each_entry_safe(mrt, next, &net->ipv6.mr6_tables, list) { list_del(&mrt->list); ip6mr_free_table(mrt); } fib_rules_unregister(net->ipv6.mr6_rules_ops); rtnl_unlock(); }

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#else #define ip6mr_for_each_table(mrt, net) \ for (mrt = net->ipv6.mrt6; mrt; mrt = NULL)
static struct mr6_table *ip6mr_get_table(struct net *net, u32 id) { return net->ipv6.mrt6; }

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static int ip6mr_fib_lookup(struct net *net, struct flowi6 *flp6, struct mr6_table **mrt) { *mrt = net->ipv6.mrt6; return 0; }

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static int __net_init ip6mr_rules_init(struct net *net) { net->ipv6.mrt6 = ip6mr_new_table(net, RT6_TABLE_DFLT); return net->ipv6.mrt6 ? 0 : -ENOMEM; }

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static void __net_exit ip6mr_rules_exit(struct net *net) { rtnl_lock(); ip6mr_free_table(net->ipv6.mrt6); net->ipv6.mrt6 = NULL; rtnl_unlock(); }

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#endif
static struct mr6_table *ip6mr_new_table(struct net *net, u32 id) { struct mr6_table *mrt; unsigned int i; mrt = ip6mr_get_table(net, id); if (mrt) return mrt; mrt = kzalloc(sizeof(*mrt), GFP_KERNEL); if (!mrt) return NULL; mrt->id = id; write_pnet(&mrt->net, net); /* Forwarding cache */ for (i = 0; i < MFC6_LINES; i++) INIT_LIST_HEAD(&mrt->mfc6_cache_array[i]); INIT_LIST_HEAD(&mrt->mfc6_unres_queue); setup_timer(&mrt->ipmr_expire_timer, ipmr_expire_process, (unsigned long)mrt); #ifdef CONFIG_IPV6_PIMSM_V2 mrt->mroute_reg_vif_num = -1; #endif #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES list_add_tail_rcu(&mrt->list, &net->ipv6.mr6_tables); #endif return mrt; }

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static void ip6mr_free_table(struct mr6_table *mrt) { del_timer_sync(&mrt->ipmr_expire_timer); mroute_clean_tables(mrt, true); kfree(mrt); }

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#ifdef CONFIG_PROC_FS struct ipmr_mfc_iter { struct seq_net_private p; struct mr6_table *mrt; struct list_head *cache; int ct; };
static struct mfc6_cache *ipmr_mfc_seq_idx(struct net *net, struct ipmr_mfc_iter *it, loff_t pos) { struct mr6_table *mrt = it->mrt; struct mfc6_cache *mfc; read_lock(&mrt_lock); for (it->ct = 0; it->ct < MFC6_LINES; it->ct++) { it->cache = &mrt->mfc6_cache_array[it->ct]; list_for_each_entry(mfc, it->cache, list) if (pos-- == 0) return mfc; } read_unlock(&mrt_lock); spin_lock_bh(&mfc_unres_lock); it->cache = &mrt->mfc6_unres_queue; list_for_each_entry(mfc, it->cache, list) if (pos-- == 0) return mfc; spin_unlock_bh(&mfc_unres_lock); it->cache = NULL; return NULL; }

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/* * The /proc interfaces to multicast routing /proc/ip6_mr_cache /proc/ip6_mr_vif */ struct ipmr_vif_iter { struct seq_net_private p; struct mr6_table *mrt; int ct; };
static struct mif_device *ip6mr_vif_seq_idx(struct net *net, struct ipmr_vif_iter *iter, loff_t pos) { struct mr6_table *mrt = iter->mrt; for (iter->ct = 0; iter->ct < mrt->maxvif; ++iter->ct) { if (!MIF_EXISTS(mrt, iter->ct)) continue; if (pos-- == 0) return &mrt->vif6_table[iter->ct]; } return NULL; }

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static void *ip6mr_vif_seq_start(struct seq_file *seq, loff_t *pos) __acquires (mrt_lock) { struct ipmr_vif_iter *iter = seq->private; struct net *net = seq_file_net(seq); struct mr6_table *mrt; mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); if (!mrt) return ERR_PTR(-ENOENT); iter->mrt = mrt; read_lock(&mrt_lock); return *pos ? ip6mr_vif_seq_idx(net, seq->private, *pos - 1) : SEQ_START_TOKEN; }

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Total97100.00%4100.00%


static void *ip6mr_vif_seq_next(struct seq_file *seq, void *v, loff_t *pos) { struct ipmr_vif_iter *iter = seq->private; struct net *net = seq_file_net(seq); struct mr6_table *mrt = iter->mrt; ++*pos; if (v == SEQ_START_TOKEN) return ip6mr_vif_seq_idx(net, iter, 0); while (++iter->ct < mrt->maxvif) { if (!MIF_EXISTS(mrt, iter->ct)) continue; return &mrt->vif6_table[iter->ct]; } return NULL; }

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static void ip6mr_vif_seq_stop(struct seq_file *seq, void *v) __releases (mrt_lock) { read_unlock(&mrt_lock); }

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static int ip6mr_vif_seq_show(struct seq_file *seq, void *v) { struct ipmr_vif_iter *iter = seq->private; struct mr6_table *mrt = iter->mrt; if (v == SEQ_START_TOKEN) { seq_puts(seq, "Interface BytesIn PktsIn BytesOut PktsOut Flags\n"); } else { const struct mif_device *vif = v; const char *name = vif->dev ? vif->dev->name : "none"; seq_printf(seq, "%2td %-10s %8ld %7ld %8ld %7ld %05X\n", vif - mrt->vif6_table, name, vif->bytes_in, vif->pkt_in, vif->bytes_out, vif->pkt_out, vif->flags); } return 0; }

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static const struct seq_operations ip6mr_vif_seq_ops = { .start = ip6mr_vif_seq_start, .next = ip6mr_vif_seq_next, .stop = ip6mr_vif_seq_stop, .show = ip6mr_vif_seq_show, };
static int ip6mr_vif_open(struct inode *inode, struct file *file) { return seq_open_net(inode, file, &ip6mr_vif_seq_ops, sizeof(struct ipmr_vif_iter)); }

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static const struct file_operations ip6mr_vif_fops = { .owner = THIS_MODULE, .open = ip6mr_vif_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release_net, };
static void *ipmr_mfc_seq_start(struct seq_file *seq, loff_t *pos) { struct ipmr_mfc_iter *it = seq->private; struct net *net = seq_file_net(seq); struct mr6_table *mrt; mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); if (!mrt) return ERR_PTR(-ENOENT); it->mrt = mrt; return *pos ? ipmr_mfc_seq_idx(net, seq->private, *pos - 1) : SEQ_START_TOKEN; }

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Total87100.00%4100.00%


static void *ipmr_mfc_seq_next(struct seq_file *seq, void *v, loff_t *pos) { struct mfc6_cache *mfc = v; struct ipmr_mfc_iter *it = seq->private; struct net *net = seq_file_net(seq); struct mr6_table *mrt = it->mrt; ++*pos; if (v == SEQ_START_TOKEN) return ipmr_mfc_seq_idx(net, seq->private, 0); if (mfc->list.next != it->cache) return list_entry(mfc->list.next, struct mfc6_cache, list); if (it->cache == &mrt->mfc6_unres_queue) goto end_of_list; BUG_ON(it->cache != &mrt->mfc6_cache_array[it->ct]); while (++it->ct < MFC6_LINES) { it->cache = &mrt->mfc6_cache_array[it->ct]; if (list_empty(it->cache)) continue; return list_first_entry(it->cache, struct mfc6_cache, list); } /* exhausted cache_array, show unresolved */ read_unlock(&mrt_lock); it->cache = &mrt->mfc6_unres_queue; it->ct = 0; spin_lock_bh(&mfc_unres_lock); if (!list_empty(it->cache)) return list_first_entry(it->cache, struct mfc6_cache, list); end_of_list: spin_unlock_bh(&mfc_unres_lock); it->cache = NULL; return NULL; }

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static void ipmr_mfc_seq_stop(struct seq_file *seq, void *v) { struct ipmr_mfc_iter *it = seq->private; struct mr6_table *mrt = it->mrt; if (it->cache == &mrt->mfc6_unres_queue) spin_unlock_bh(&mfc_unres_lock); else if (it->cache == &mrt->mfc6_cache_array[it->ct]) read_unlock(&mrt_lock); }

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Total73100.00%6100.00%


static int ipmr_mfc_seq_show(struct seq_file *seq, void *v) { int n; if (v == SEQ_START_TOKEN) { seq_puts(seq, "Group " "Origin " "Iif Pkts Bytes Wrong Oifs\n"); } else { const struct mfc6_cache *mfc = v; const struct ipmr_mfc_iter *it = seq->private; struct mr6_table *mrt = it->mrt; seq_printf(seq, "%pI6 %pI6 %-3hd", &mfc->mf6c_mcastgrp, &mfc->mf6c_origin, mfc->mf6c_parent); if (it->cache != &mrt->mfc6_unres_queue) { seq_printf(seq, " %8lu %8lu %8lu", mfc->mfc_un.res.pkt, mfc->mfc_un.res.bytes, mfc->mfc_un.res.wrong_if); for (n = mfc->mfc_un.res.minvif; n < mfc->mfc_un.res.maxvif; n++) { if (MIF_EXISTS(mrt, n) && mfc->mfc_un.res.ttls[n] < 255) seq_printf(seq, " %2d:%-3d", n, mfc->mfc_un.res.ttls[n]); } } else { /* unresolved mfc_caches don't contain * pkt, bytes and wrong_if values */ seq_printf(seq, " %8lu %8lu %8lu", 0ul, 0ul, 0ul); } seq_putc(seq, '\n'); } return 0; }

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Total226100.00%8100.00%

static const struct seq_operations ipmr_mfc_seq_ops = { .start = ipmr_mfc_seq_start, .next = ipmr_mfc_seq_next, .stop = ipmr_mfc_seq_stop, .show = ipmr_mfc_seq_show, };
static int ipmr_mfc_open(struct inode *inode, struct file *file) { return seq_open_net(inode, file, &ipmr_mfc_seq_ops, sizeof(struct ipmr_mfc_iter)); }

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Total33100.00%2100.00%

static const struct file_operations ip6mr_mfc_fops = { .owner = THIS_MODULE, .open = ipmr_mfc_open, .read = seq_read, .llseek = seq_lseek, .release = seq_release_net, }; #endif #ifdef CONFIG_IPV6_PIMSM_V2
static int pim6_rcv(struct sk_buff *skb) { struct pimreghdr *pim; struct ipv6hdr *encap; struct net_device *reg_dev = NULL; struct net *net = dev_net(skb->dev); struct mr6_table *mrt; struct flowi6 fl6 = { .flowi6_iif = skb->dev->ifindex, .flowi6_mark = skb->mark, }; int reg_vif_num; if (!pskb_may_pull(skb, sizeof(*pim) + sizeof(*encap))) goto drop; pim = (struct pimreghdr *)skb_transport_header(skb); if (pim->type != ((PIM_VERSION << 4) | PIM_TYPE_REGISTER) || (pim->flags & PIM_NULL_REGISTER) || (csum_ipv6_magic(&ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr, sizeof(*pim), IPPROTO_PIM, csum_partial((void *)pim, sizeof(*pim), 0)) && csum_fold(skb_checksum(skb, 0, skb->len, 0)))) goto drop; /* check if the inner packet is destined to mcast group */ encap = (struct ipv6hdr *)(skb_transport_header(skb) + sizeof(*pim)); if (!ipv6_addr_is_multicast(&encap->daddr) || encap->payload_len == 0 || ntohs(encap->payload_len) + sizeof(*pim) > skb->len) goto drop; if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0) goto drop; reg_vif_num = mrt->mroute_reg_vif_num; read_lock(&mrt_lock); if (reg_vif_num >= 0) reg_dev = mrt->vif6_table[reg_vif_num].dev; if (reg_dev) dev_hold(reg_dev); read_unlock(&mrt_lock); if (!reg_dev) goto drop; skb->mac_header = skb->network_header; skb_pull(skb, (u8 *)encap - skb->data); skb_reset_network_header(skb); skb->protocol = htons(ETH_P_IPV6); skb->ip_summed = CHECKSUM_NONE; skb_tunnel_rx(skb, reg_dev, dev_net(reg_dev)); netif_rx(skb); dev_put(reg_dev); return 0; drop: kfree_skb(skb); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明29172.75%215.38%
Patrick McHardy4611.50%215.38%
Thomas Goff317.75%17.69%
Benjamin Thery174.25%215.38%
Nicolas Dichtel51.25%17.69%
David S. Miller51.25%17.69%
Eric Dumazet20.50%17.69%
Nikolay Aleksandrov10.25%17.69%
Cesar Eduardo Barros10.25%17.69%
Ian Morris10.25%17.69%
Total400100.00%13100.00%

static const struct inet6_protocol pim6_protocol = { .handler = pim6_rcv, }; /* Service routines creating virtual interfaces: PIMREG */
static netdev_tx_t reg_vif_xmit(struct sk_buff *skb, struct net_device *dev) { struct net *net = dev_net(dev); struct mr6_table *mrt; struct flowi6 fl6 = { .flowi6_oif = dev->ifindex, .flowi6_iif = skb->skb_iif ? : LOOPBACK_IFINDEX, .flowi6_mark = skb->mark, }; int err; err = ip6mr_fib_lookup(net, &fl6, &mrt); if (err < 0) { kfree_skb(skb); return err; } read_lock(&mrt_lock); dev->stats.tx_bytes += skb->len; dev->stats.tx_packets++; ip6mr_cache_report(mrt, skb, mrt->mroute_reg_vif_num, MRT6MSG_WHOLEPKT); read_unlock(&mrt_lock); kfree_skb(skb); return NETDEV_TX_OK; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明5538.46%19.09%
Patrick McHardy5437.76%327.27%
Benjamin Thery139.09%218.18%
Ben Greear74.90%19.09%
David S. Miller64.20%19.09%
Pavel Emelyanov42.80%19.09%
Cong Wang32.10%19.09%
Stephen Hemminger10.70%19.09%
Total143100.00%11100.00%


static int reg_vif_get_iflink(const struct net_device *dev) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Nicolas Dichtel15100.00%1100.00%
Total15100.00%1100.00%

static const struct net_device_ops reg_vif_netdev_ops = { .ndo_start_xmit = reg_vif_xmit, .ndo_get_iflink = reg_vif_get_iflink, };
static void reg_vif_setup(struct net_device *dev) { dev->type = ARPHRD_PIMREG; dev->mtu = 1500 - sizeof(struct ipv6hdr) - 8; dev->flags = IFF_NOARP; dev->netdev_ops = &reg_vif_netdev_ops; dev->destructor = free_netdev; dev->features |= NETIF_F_NETNS_LOCAL; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明4783.93%133.33%
Thomas Goff610.71%133.33%
Stephen Hemminger35.36%133.33%
Total56100.00%3100.00%


static struct net_device *ip6mr_reg_vif(struct net *net, struct mr6_table *mrt) { struct net_device *dev; char name[IFNAMSIZ]; if (mrt->id == RT6_TABLE_DFLT) sprintf(name, "pim6reg"); else sprintf(name, "pim6reg%u", mrt->id); dev = alloc_netdev(0, name, NET_NAME_UNKNOWN, reg_vif_setup); if (!dev) return NULL; dev_net_set(dev, net); if (register_netdevice(dev)) { free_netdev(dev); return NULL; } if (dev_open(dev)) goto failure; dev_hold(dev); return dev; failure: unregister_netdevice(dev); return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明7054.26%114.29%
Patrick McHardy3930.23%114.29%
Benjamin Thery118.53%114.29%
Wang Chen53.88%114.29%
Tom Gundersen21.55%114.29%
Ian Morris10.78%114.29%
Pavel Emelyanov10.78%114.29%
Total129100.00%7100.00%

#endif /* * Delete a VIF entry */
static int mif6_delete(struct mr6_table *mrt, int vifi, int notify, struct list_head *head) { struct mif_device *v; struct net_device *dev; struct inet6_dev *in6_dev; if (vifi < 0 || vifi >= mrt->maxvif) return -EADDRNOTAVAIL; v = &mrt->vif6_table[vifi]; write_lock_bh(&mrt_lock); dev = v->dev; v->dev = NULL; if (!dev) { write_unlock_bh(&mrt_lock); return -EADDRNOTAVAIL; } #ifdef CONFIG_IPV6_PIMSM_V2 if (vifi == mrt->mroute_reg_vif_num) mrt->mroute_reg_vif_num = -1; #endif if (vifi + 1 == mrt->maxvif) { int tmp; for (tmp = vifi - 1; tmp >= 0; tmp--) { if (MIF_EXISTS(mrt, tmp)) break; } mrt->maxvif = tmp + 1; } write_unlock_bh(&mrt_lock); dev_set_allmulti(dev, -1); in6_dev = __in6_dev_get(dev); if (in6_dev) { in6_dev->cnf.mc_forwarding--; inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_MC_FORWARDING, dev->ifindex, &in6_dev->cnf); } if ((v->flags & MIFF_REGISTER) && !notify) unregister_netdevice_queue(dev, head); dev_put(dev); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明16867.47%220.00%
Thomas Goff239.24%110.00%
Nicolas Dichtel218.43%110.00%
Benjamin Thery124.82%330.00%
Patrick McHardy93.61%110.00%
Eric Dumazet83.21%110.00%
Nikolay Aleksandrov83.21%110.00%
Total249100.00%10100.00%


static inline void ip6mr_cache_free(struct mfc6_cache *c) { kmem_cache_free(mrt_cachep, c); }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Thery19100.00%1100.00%
Total19100.00%1100.00%

/* Destroy an unresolved cache entry, killing queued skbs and reporting error to netlink readers. */
static void ip6mr_destroy_unres(struct mr6_table *mrt, struct mfc6_cache *c) { struct net *net = read_pnet(&mrt->net); struct sk_buff *skb; atomic_dec(&mrt->cache_resolve_queue_len); while ((skb = skb_dequeue(&c->mfc_un.unres.unresolved)) != NULL) { if (ipv6_hdr(skb)->version == 0) { struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct ipv6hdr)); nlh->nlmsg_type = NLMSG_ERROR; nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); skb_trim(skb, nlh->nlmsg_len); ((struct nlmsgerr *)nlmsg_data(nlh))->error = -ETIMEDOUT; rtnl_unicast(skb, net, NETLINK_CB(skb).portid); } else kfree_skb(skb); } ip6mr_cache_free(c); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明14385.12%114.29%
Patrick McHardy1911.31%228.57%
Benjamin Thery31.79%228.57%
Hong Zhi Guo21.19%114.29%
Eric W. Biedermann10.60%114.29%
Total168100.00%7100.00%

/* Timer process for all the unresolved queue. */
static void ipmr_do_expire_process(struct mr6_table *mrt) { unsigned long now = jiffies; unsigned long expires = 10 * HZ; struct mfc6_cache *c, *next; list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) { if (time_after(c->mfc_un.unres.expires, now)) { /* not yet... */ unsigned long interval = c->mfc_un.unres.expires - now; if (interval < expires) expires = interval; continue; } list_del(&c->list); mr6_netlink_event(mrt, c, RTM_DELROUTE); ip6mr_destroy_unres(mrt, c); } if (!list_empty(&mrt->mfc6_unres_queue)) mod_timer(&mrt->ipmr_expire_timer, jiffies + expires); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明9469.63%116.67%
Patrick McHardy3223.70%466.67%
Nicolas Dichtel96.67%116.67%
Total135100.00%6100.00%


static void ipmr_expire_process(unsigned long arg) { struct mr6_table *mrt = (struct mr6_table *)arg; if (!spin_trylock(&mfc_unres_lock)) { mod_timer(&mrt->ipmr_expire_timer, jiffies + 1); return; } if (!list_empty(&mrt->mfc6_unres_queue)) ipmr_do_expire_process(mrt); spin_unlock(&mfc_unres_lock); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明4464.71%125.00%
Patrick McHardy2435.29%375.00%
Total68100.00%4100.00%

/* Fill oifs list. It is called under write locked mrt_lock. */
static void ip6mr_update_thresholds(struct mr6_table *mrt, struct mfc6_cache *cache, unsigned char *ttls) { int vifi; cache->mfc_un.res.minvif = MAXMIFS; cache->mfc_un.res.maxvif = 0; memset(cache->mfc_un.res.ttls, 255, MAXMIFS); for (vifi = 0; vifi < mrt->maxvif; vifi++) { if (MIF_EXISTS(mrt, vifi) && ttls[vifi] && ttls[vifi] < 255) { cache->mfc_un.res.ttls[vifi] = ttls[vifi]; if (cache->mfc_un.res.minvif > vifi) cache->mfc_un.res.minvif = vifi; if (cache->mfc_un.res.maxvif <= vifi) cache->mfc_un.res.maxvif = vifi + 1; } } cache->mfc_un.res.lastuse = jiffies; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明15087.72%114.29%
Nikolay Aleksandrov105.85%114.29%
Patrick McHardy74.09%228.57%
Rami Rosen21.17%114.29%
Benjamin Thery21.17%228.57%
Total171100.00%7100.00%


static int mif6_add(struct net *net, struct mr6_table *mrt, struct mif6ctl *vifc, int mrtsock) { int vifi = vifc->mif6c_mifi; struct mif_device *v = &mrt->vif6_table[vifi]; struct net_device *dev; struct inet6_dev *in6_dev; int err; /* Is vif busy ? */ if (MIF_EXISTS(mrt, vifi)) return -EADDRINUSE; switch (vifc->mif6c_flags) { #ifdef CONFIG_IPV6_PIMSM_V2 case MIFF_REGISTER: /* * Special Purpose VIF in PIM * All the packets will be sent to the daemon */ if (mrt->mroute_reg_vif_num >= 0) return -EADDRINUSE; dev = ip6mr_reg_vif(net, mrt); if (!dev) return -ENOBUFS; err = dev_set_allmulti(dev, 1); if (err) { unregister_netdevice(dev); dev_put(dev); return err; } break; #endif case 0: dev = dev_get_by_index(net, vifc->mif6c_pifi); if (!dev) return -EADDRNOTAVAIL; err = dev_set_allmulti(dev, 1); if (err) { dev_put(dev); return err; } break; default: return -EINVAL; } in6_dev = __in6_dev_get(dev); if (in6_dev) { in6_dev->cnf.mc_forwarding++; inet6_netconf_notify_devconf(dev_net(dev), NETCONFA_MC_FORWARDING, dev->ifindex, &in6_dev->cnf); } /* * Fill in the VIF structures */ v->rate_limit = vifc->vifc_rate_limit; v->flags = vifc->mif6c_flags; if (!mrtsock) v->flags |= VIFF_STATIC; v->threshold = vifc->vifc_threshold; v->bytes_in = 0; v->bytes_out = 0; v->pkt_in = 0; v->pkt_out = 0; v->link = dev->ifindex; if (v->flags & MIFF_REGISTER) v->link = dev_get_iflink(dev); /* And finish update writing critical data */ write_lock_bh(&mrt_lock); v->dev = dev; #ifdef CONFIG_IPV6_PIMSM_V2 if (v->flags & MIFF_REGISTER) mrt->mroute_reg_vif_num = vifi; #endif if (vifi + 1 > mrt->maxvif) mrt->maxvif = vifi + 1; write_unlock_bh(&mrt_lock); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明25165.71%216.67%
Wang Chen5414.14%216.67%
Nicolas Dichtel246.28%216.67%
Thomas Goff236.02%18.33%
Benjamin Thery174.45%325.00%
Patrick McHardy133.40%216.67%
Total382100.00%12100.00%


static struct mfc6_cache *ip6mr_cache_find(struct mr6_table *mrt, const struct in6_addr *origin, const struct in6_addr *mcastgrp) { int line = MFC6_HASH(mcastgrp, origin); struct mfc6_cache *c; list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) { if (ipv6_addr_equal(&c->mf6c_origin, origin) && ipv6_addr_equal(&c->mf6c_mcastgrp, mcastgrp)) return c; } return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明5975.64%120.00%
Patrick McHardy1417.95%240.00%
Benjamin Thery33.85%120.00%
Eric Dumazet22.56%120.00%
Total78100.00%5100.00%

/* Look for a (*,*,oif) entry */
static struct mfc6_cache *ip6mr_cache_find_any_parent(struct mr6_table *mrt, mifi_t mifi) { int line = MFC6_HASH(&in6addr_any, &in6addr_any); struct mfc6_cache *c; list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) if (ipv6_addr_any(&c->mf6c_origin) && ipv6_addr_any(&c->mf6c_mcastgrp) && (c->mfc_un.res.ttls[mifi] < 255)) return c; return NULL; }

Contributors

PersonTokensPropCommitsCommitProp
Nicolas Dichtel80100.00%1100.00%
Total80100.00%1100.00%

/* Look for a (*,G) entry */
static struct mfc6_cache *ip6mr_cache_find_any(struct mr6_table *mrt, struct in6_addr *mcastgrp, mifi_t mifi) { int line = MFC6_HASH(mcastgrp, &in6addr_any); struct mfc6_cache *c, *proxy; if (ipv6_addr_any(mcastgrp)) goto skip; list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) if (ipv6_addr_any(&c->mf6c_origin) && ipv6_addr_equal(&c->mf6c_mcastgrp, mcastgrp)) { if (c->mfc_un.res.ttls[mifi] < 255) return c; /* It's ok if the mifi is part of the static tree */ proxy = ip6mr_cache_find_any_parent(mrt, c->mf6c_parent); if (proxy && proxy->mfc_un.res.ttls[mifi] < 255) return c; } skip: return ip6mr_cache_find_any_parent(mrt, mifi); }

Contributors

PersonTokensPropCommitsCommitProp
Nicolas Dichtel140100.00%1100.00%
Total140100.00%1100.00%

/* * Allocate a multicast cache entry */
static struct mfc6_cache *ip6mr_cache_alloc(void) { struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_KERNEL); if (!c) return NULL; c->mfc_un.res.last_assert = jiffies - MFC_ASSERT_THRESH - 1; c->mfc_un.res.minvif = MAXMIFS; return c; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明3968.42%116.67%
Thomas Goff1424.56%116.67%
Ian Morris11.75%116.67%
Patrick McHardy11.75%116.67%
Joe Perches11.75%116.67%
Rami Rosen11.75%116.67%
Total57100.00%6100.00%


static struct mfc6_cache *ip6mr_cache_alloc_unres(void) { struct mfc6_cache *c = kmem_cache_zalloc(mrt_cachep, GFP_ATOMIC); if (!c) return NULL; skb_queue_head_init(&c->mfc_un.unres.unresolved); c->mfc_un.unres.expires = jiffies + 10 * HZ; return c; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明5694.92%125.00%
Patrick McHardy11.69%125.00%
Joe Perches11.69%125.00%
Ian Morris11.69%125.00%
Total59100.00%4100.00%

/* * A cache entry has gone into a resolved state from queued */
static void ip6mr_cache_resolve(struct net *net, struct mr6_table *mrt, struct mfc6_cache *uc, struct mfc6_cache *c) { struct sk_buff *skb; /* * Play the pending entries through our router */ while ((skb = __skb_dequeue(&uc->mfc_un.unres.unresolved))) { if (ipv6_hdr(skb)->version == 0) { struct nlmsghdr *nlh = (struct nlmsghdr *)skb_pull(skb, sizeof(struct ipv6hdr)); if (__ip6mr_fill_mroute(mrt, skb, c, nlmsg_data(nlh)) > 0) { nlh->nlmsg_len = skb_tail_pointer(skb) - (u8 *)nlh; } else { nlh->nlmsg_type = NLMSG_ERROR; nlh->nlmsg_len = nlmsg_msg_size(sizeof(struct nlmsgerr)); skb_trim(skb, nlh->nlmsg_len); ((struct nlmsgerr *)nlmsg_data(nlh))->error = -EMSGSIZE; } rtnl_unicast(skb, net, NETLINK_CB(skb).portid); } else ip6_mr_forward(net, mrt, skb, c); } }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明17388.72%228.57%
Patrick McHardy189.23%342.86%
Hong Zhi Guo31.54%114.29%
Eric W. Biedermann10.51%114.29%
Total195100.00%7100.00%

/* * Bounce a cache query up to pim6sd. We could use netlink for this but pim6sd * expects the following bizarre scheme. * * Called under mrt_lock. */
static int ip6mr_cache_report(struct mr6_table *mrt, struct sk_buff *pkt, mifi_t mifi, int assert) { struct sk_buff *skb; struct mrt6msg *msg; int ret; #ifdef CONFIG_IPV6_PIMSM_V2 if (assert == MRT6MSG_WHOLEPKT) skb = skb_realloc_headroom(pkt, -skb_network_offset(pkt) +sizeof(*msg)); else #endif skb = alloc_skb(sizeof(struct ipv6hdr) + sizeof(*msg), GFP_ATOMIC); if (!skb) return -ENOBUFS; /* I suppose that internal messages * do not require checksums */ skb->ip_summed = CHECKSUM_UNNECESSARY; #ifdef CONFIG_IPV6_PIMSM_V2 if (assert == MRT6MSG_WHOLEPKT) { /* Ugly, but we have no choice with this interface. Duplicate old header, fix length etc. And all this only to mangle msg->im6_msgtype and to set msg->im6_mbz to "mbz" :-) */ skb_push(skb, -skb_network_offset(pkt)); skb_push(skb, sizeof(*msg)); skb_reset_transport_header(skb); msg = (struct mrt6msg *)skb_transport_header(skb); msg->im6_mbz = 0; msg->im6_msgtype = MRT6MSG_WHOLEPKT; msg->im6_mif = mrt->mroute_reg_vif_num; msg->im6_pad = 0; msg->im6_src = ipv6_hdr(pkt)->saddr; msg->im6_dst = ipv6_hdr(pkt)->daddr; skb->ip_summed = CHECKSUM_UNNECESSARY; } else #endif { /* * Copy the IP header */ skb_put(skb, sizeof(struct ipv6hdr)); skb_reset_network_header(skb); skb_copy_to_linear_data(skb, ipv6_hdr(pkt), sizeof(struct ipv6hdr)); /* * Add our header */ skb_put(skb, sizeof(*msg)); skb_reset_transport_header(skb); msg = (struct mrt6msg *)skb_transport_header(skb); msg->im6_mbz = 0; msg->im6_msgtype = assert; msg->im6_mif = mifi; msg->im6_pad = 0; msg->im6_src = ipv6_hdr(pkt)->saddr; msg->im6_dst = ipv6_hdr(pkt)->daddr; skb_dst_set(skb, dst_clone(skb_dst(pkt))); skb->ip_summed = CHECKSUM_UNNECESSARY; } if (!mrt->mroute6_sk) { kfree_skb(skb); return -EINVAL; } /* * Deliver to user space multicast routing algorithms */ ret = sock_queue_rcv_skb(mrt->mroute6_sk, skb); if (ret < 0) { net_warn_ratelimited("mroute6: pending queue full, dropping entries\n"); kfree_skb(skb); } return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明35491.00%218.18%
Benjamin Thery133.34%327.27%
Eric Dumazet71.80%19.09%
Patrick McHardy51.29%19.09%
Alexey Dobriyan41.03%19.09%
Rami Rosen30.77%19.09%
Joe Perches20.51%19.09%
Ian Morris10.26%19.09%
Total389100.00%11100.00%

/* * Queue a packet for resolution. It gets locked cache entry! */
static int ip6mr_cache_unresolved(struct mr6_table *mrt, mifi_t mifi, struct sk_buff *skb) { bool found = false; int err; struct mfc6_cache *c; spin_lock_bh(&mfc_unres_lock); list_for_each_entry(c, &mrt->mfc6_unres_queue, list) { if (ipv6_addr_equal(&c->mf6c_mcastgrp, &ipv6_hdr(skb)->daddr) && ipv6_addr_equal(&c->mf6c_origin, &ipv6_hdr(skb)->saddr)) { found = true; break; } } if (!found) { /* * Create a new entry if allowable */ if (atomic_read(&mrt->cache_resolve_queue_len) >= 10 || (c = ip6mr_cache_alloc_unres()) == NULL) { spin_unlock_bh(&mfc_unres_lock); kfree_skb(skb); return -ENOBUFS; } /* * Fill in the new cache entry */ c->mf6c_parent = -1; c->mf6c_origin = ipv6_hdr(skb)->saddr; c->mf6c_mcastgrp = ipv6_hdr(skb)->daddr; /* * Reflect first query at pim6sd */ err = ip6mr_cache_report(mrt, skb, mifi, MRT6MSG_NOCACHE); if (err < 0) { /* If the report failed throw the cache entry out - Brad Parker */ spin_unlock_bh(&mfc_unres_lock); ip6mr_cache_free(c); kfree_skb(skb); return err; } atomic_inc(&mrt->cache_resolve_queue_len); list_add(&c->list, &mrt->mfc6_unres_queue); mr6_netlink_event(mrt, c, RTM_NEWROUTE); ipmr_do_expire_process(mrt); } /* * See if we can append the packet */ if (c->mfc_un.unres.unresolved.qlen > 3) { kfree_skb(skb); err = -ENOBUFS; } else { skb_queue_tail(&c->mfc_un.unres.unresolved, skb); err = 0; } spin_unlock_bh(&mfc_unres_lock); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明23879.60%111.11%
Patrick McHardy3812.71%444.44%
Benjamin Thery113.68%222.22%
Nicolas Dichtel93.01%111.11%
Rami Rosen31.00%111.11%
Total299100.00%9100.00%

/* * MFC6 cache manipulation by user space */
static int ip6mr_mfc_delete(struct mr6_table *mrt, struct mf6cctl *mfc, int parent) { int line; struct mfc6_cache *c, *next; line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr); list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[line], list) { if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) && ipv6_addr_equal(&c->mf6c_mcastgrp, &mfc->mf6cc_mcastgrp.sin6_addr) && (parent == -1 || parent == c->mf6c_parent)) { write_lock_bh(&mrt_lock); list_del(&c->list); write_unlock_bh(&mrt_lock); mr6_netlink_event(mrt, c, RTM_DELROUTE); ip6mr_cache_free(c); return 0; } } return -ENOENT; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明10268.46%114.29%
Nicolas Dichtel2516.78%228.57%
Patrick McHardy1812.08%228.57%
Benjamin Thery42.68%228.57%
Total149100.00%7100.00%


static int ip6mr_device_event(struct notifier_block *this, unsigned long event, void *ptr) { struct net_device *dev = netdev_notifier_info_to_dev(ptr); struct net *net = dev_net(dev); struct mr6_table *mrt; struct mif_device *v; int ct; if (event != NETDEV_UNREGISTER) return NOTIFY_DONE; ip6mr_for_each_table(mrt, net) { v = &mrt->vif6_table[0]; for (ct = 0; ct < mrt->maxvif; ct++, v++) { if (v->dev == dev) mif6_delete(mrt, ct, 1, NULL); } } return NOTIFY_DONE; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明8570.25%114.29%
Patrick McHardy1613.22%228.57%
Benjamin Thery1310.74%114.29%
Jiri Pirko32.48%114.29%
Nikolay Aleksandrov32.48%114.29%
Eric Dumazet10.83%114.29%
Total121100.00%7100.00%

static struct notifier_block ip6_mr_notifier = { .notifier_call = ip6mr_device_event }; /* * Setup for IP multicast routing */
static int __net_init ip6mr_net_init(struct net *net) { int err; err = ip6mr_rules_init(net); if (err < 0) goto fail; #ifdef CONFIG_PROC_FS err = -ENOMEM; if (!proc_create("ip6_mr_vif", 0, net->proc_net, &ip6mr_vif_fops)) goto proc_vif_fail; if (!proc_create("ip6_mr_cache", 0, net->proc_net, &ip6mr_mfc_fops)) goto proc_cache_fail; #endif return 0; #ifdef CONFIG_PROC_FS proc_cache_fail: remove_proc_entry("ip6_mr_vif", net->proc_net); proc_vif_fail: ip6mr_rules_exit(net); #endif fail: return err; }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Thery8676.79%342.86%
Gao Feng1513.39%228.57%
Patrick McHardy119.82%228.57%
Total112100.00%7100.00%


static void __net_exit ip6mr_net_exit(struct net *net) { #ifdef CONFIG_PROC_FS remove_proc_entry("ip6_mr_cache", net->proc_net); remove_proc_entry("ip6_mr_vif", net->proc_net); #endif ip6mr_rules_exit(net); }

Contributors

PersonTokensPropCommitsCommitProp
Benjamin Thery2870.00%360.00%
Gao Feng1025.00%120.00%
Patrick McHardy25.00%120.00%
Total40100.00%5100.00%

static struct pernet_operations ip6mr_net_ops = { .init = ip6mr_net_init, .exit = ip6mr_net_exit, };
int __init ip6_mr_init(void) { int err; mrt_cachep = kmem_cache_create("ip6_mrt_cache", sizeof(struct mfc6_cache), 0, SLAB_HWCACHE_ALIGN, NULL); if (!mrt_cachep) return -ENOMEM; err = register_pernet_subsys(&ip6mr_net_ops); if (err) goto reg_pernet_fail; err = register_netdevice_notifier(&ip6_mr_notifier); if (err) goto reg_notif_fail; #ifdef CONFIG_IPV6_PIMSM_V2 if (inet6_add_protocol(&pim6_protocol, IPPROTO_PIM) < 0) { pr_err("%s: can't add PIM protocol\n", __func__); err = -EAGAIN; goto add_proto_fail; } #endif rtnl_register(RTNL_FAMILY_IP6MR, RTM_GETROUTE, NULL, ip6mr_rtm_dumproute, NULL); return 0; #ifdef CONFIG_IPV6_PIMSM_V2 add_proto_fail: unregister_netdevice_notifier(&ip6_mr_notifier); #endif reg_notif_fail: unregister_pernet_subsys(&ip6mr_net_ops); reg_pernet_fail: kmem_cache_destroy(mrt_cachep); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Thomas Goff4328.67%112.50%
Hideaki Yoshifuji / 吉藤英明3724.67%112.50%
Benjamin Thery2718.00%225.00%
Wang Chen2617.33%112.50%
Patrick McHardy117.33%112.50%
Joe Perches42.67%112.50%
Greg Rose21.33%112.50%
Total150100.00%8100.00%


void ip6_mr_cleanup(void) { rtnl_unregister(RTNL_FAMILY_IP6MR, RTM_GETROUTE); #ifdef CONFIG_IPV6_PIMSM_V2 inet6_del_protocol(&pim6_protocol, IPPROTO_PIM); #endif unregister_netdevice_notifier(&ip6_mr_notifier); unregister_pernet_subsys(&ip6mr_net_ops); kmem_cache_destroy(mrt_cachep); }

Contributors

PersonTokensPropCommitsCommitProp
Duan Jiong2045.45%125.00%
Wang Chen1738.64%125.00%
Benjamin Thery613.64%125.00%
Hideaki Yoshifuji / 吉藤英明12.27%125.00%
Total44100.00%4100.00%


static int ip6mr_mfc_add(struct net *net, struct mr6_table *mrt, struct mf6cctl *mfc, int mrtsock, int parent) { bool found = false; int line; struct mfc6_cache *uc, *c; unsigned char ttls[MAXMIFS]; int i; if (mfc->mf6cc_parent >= MAXMIFS) return -ENFILE; memset(ttls, 255, MAXMIFS); for (i = 0; i < MAXMIFS; i++) { if (IF_ISSET(i, &mfc->mf6cc_ifset)) ttls[i] = 1; } line = MFC6_HASH(&mfc->mf6cc_mcastgrp.sin6_addr, &mfc->mf6cc_origin.sin6_addr); list_for_each_entry(c, &mrt->mfc6_cache_array[line], list) { if (ipv6_addr_equal(&c->mf6c_origin, &mfc->mf6cc_origin.sin6_addr) && ipv6_addr_equal(&c->mf6c_mcastgrp, &mfc->mf6cc_mcastgrp.sin6_addr) && (parent == -1 || parent == mfc->mf6cc_parent)) { found = true; break; } } if (found) { write_lock_bh(&mrt_lock); c->mf6c_parent = mfc->mf6cc_parent; ip6mr_update_thresholds(mrt, c, ttls); if (!mrtsock) c->mfc_flags |= MFC_STATIC; write_unlock_bh(&mrt_lock); mr6_netlink_event(mrt, c, RTM_NEWROUTE); return 0; } if (!ipv6_addr_any(&mfc->mf6cc_mcastgrp.sin6_addr) && !ipv6_addr_is_multicast(&mfc->mf6cc_mcastgrp.sin6_addr)) return -EINVAL; c = ip6mr_cache_alloc(); if (!c) return -ENOMEM; c->mf6c_origin = mfc->mf6cc_origin.sin6_addr; c->mf6c_mcastgrp = mfc->mf6cc_mcastgrp.sin6_addr; c->mf6c_parent = mfc->mf6cc_parent; ip6mr_update_thresholds(mrt, c, ttls); if (!mrtsock) c->mfc_flags |= MFC_STATIC; write_lock_bh(&mrt_lock); list_add(&c->list, &mrt->mfc6_cache_array[line]); write_unlock_bh(&mrt_lock); /* * Check to see if we resolved a queued list. If so we * need to send on the frames and tidy up. */ found = false; spin_lock_bh(&mfc_unres_lock); list_for_each_entry(uc, &mrt->mfc6_unres_queue, list) { if (ipv6_addr_equal(&uc->mf6c_origin, &c->mf6c_origin) && ipv6_addr_equal(&uc->mf6c_mcastgrp, &c->mf6c_mcastgrp)) { list_del(&uc->list); atomic_dec(&mrt->cache_resolve_queue_len); found = true; break; } } if (list_empty(&mrt->mfc6_unres_queue)) del_timer(&mrt->ipmr_expire_timer); spin_unlock_bh(&mfc_unres_lock); if (found) { ip6mr_cache_resolve(net, mrt, uc, c); ip6mr_cache_free(uc); } mr6_netlink_event(mrt, c, RTM_NEWROUTE); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明34569.70%17.69%
Patrick McHardy8617.37%538.46%
Nicolas Dichtel459.09%215.38%
Benjamin Thery153.03%323.08%
Rami Rosen30.61%17.69%
Ian Morris10.20%17.69%
Total495100.00%13100.00%

/* * Close the multicast socket, and clear the vif tables etc */
static void mroute_clean_tables(struct mr6_table *mrt, bool all) { int i; LIST_HEAD(list); struct mfc6_cache *c, *next; /* * Shut down all active vif entries */ for (i = 0; i < mrt->maxvif; i++) { if (!all && (mrt->vif6_table[i].flags & VIFF_STATIC)) continue; mif6_delete(mrt, i, 0, &list); } unregister_netdevice_many(&list); /* * Wipe the cache */ for (i = 0; i < MFC6_LINES; i++) { list_for_each_entry_safe(c, next, &mrt->mfc6_cache_array[i], list) { if (!all && (c->mfc_flags & MFC_STATIC)) continue; write_lock_bh(&mrt_lock); list_del(&c->list); write_unlock_bh(&mrt_lock); mr6_netlink_event(mrt, c, RTM_DELROUTE); ip6mr_cache_free(c); } } if (atomic_read(&mrt->cache_resolve_queue_len) != 0) { spin_lock_bh(&mfc_unres_lock); list_for_each_entry_safe(c, next, &mrt->mfc6_unres_queue, list) { list_del(&c->list); mr6_netlink_event(mrt, c, RTM_DELROUTE); ip6mr_destroy_unres(mrt, c); } spin_unlock_bh(&mfc_unres_lock); } }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明12656.50%19.09%
Patrick McHardy4620.63%327.27%
Nicolas Dichtel188.07%19.09%
Eric Dumazet146.28%19.09%
Nikolay Aleksandrov135.83%218.18%
Benjamin Thery62.69%327.27%
Total223100.00%11100.00%


static int ip6mr_sk_init(struct mr6_table *mrt, struct sock *sk) { int err = 0; struct net *net = sock_net(sk); rtnl_lock(); write_lock_bh(&mrt_lock); if (likely(mrt->mroute6_sk == NULL)) { mrt->mroute6_sk = sk; net->ipv6.devconf_all->mc_forwarding++; } else { err = -EADDRINUSE; } write_unlock_bh(&mrt_lock); if (!err) inet6_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING, NETCONFA_IFINDEX_ALL, net->ipv6.devconf_all); rtnl_unlock(); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明4238.89%114.29%
Eric Dumazet2018.52%114.29%
Nicolas Dichtel1513.89%114.29%
Benjamin Thery1412.96%228.57%
Thomas Goff109.26%114.29%
Patrick McHardy76.48%114.29%
Total108100.00%7100.00%


int ip6mr_sk_done(struct sock *sk) { int err = -EACCES; struct net *net = sock_net(sk); struct mr6_table *mrt; rtnl_lock(); ip6mr_for_each_table(mrt, net) { if (sk == mrt->mroute6_sk) { write_lock_bh(&mrt_lock); mrt->mroute6_sk = NULL; net->ipv6.devconf_all->mc_forwarding--; write_unlock_bh(&mrt_lock); inet6_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING, NETCONFA_IFINDEX_ALL, net->ipv6.devconf_all); mroute_clean_tables(mrt, false); err = 0; break; } } rtnl_unlock(); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明4540.18%111.11%
Patrick McHardy2118.75%222.22%
Nicolas Dichtel1513.39%111.11%
Benjamin Thery1412.50%222.22%
Thomas Goff98.04%111.11%
Eric Dumazet65.36%111.11%
Nikolay Aleksandrov21.79%111.11%
Total112100.00%9100.00%


struct sock *mroute6_socket(struct net *net, struct sk_buff *skb) { struct mr6_table *mrt; struct flowi6 fl6 = { .flowi6_iif = skb->skb_iif ? : LOOPBACK_IFINDEX, .flowi6_oif = skb->dev->ifindex, .flowi6_mark = skb->mark, }; if (ip6mr_fib_lookup(net, &fl6, &mrt) < 0) return NULL; return mrt->mroute6_sk; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy6888.31%250.00%
David S. Miller67.79%125.00%
Julian Anastasov33.90%125.00%
Total77100.00%4100.00%

/* * Socket options and virtual interface manipulation. The whole * virtual interface system is a complete heap, but unfortunately * that's how BSD mrouted happens to think. Maybe one day with a proper * MOSPF/PIM router set up we can clean this up. */
int ip6_mroute_setsockopt(struct sock *sk, int optname, char __user *optval, unsigned int optlen) { int ret, parent = 0; struct mif6ctl vif; struct mf6cctl mfc; mifi_t mifi; struct net *net = sock_net(sk); struct mr6_table *mrt; if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_ICMPV6) return -EOPNOTSUPP; mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); if (!mrt) return -ENOENT; if (optname != MRT6_INIT) { if (sk != mrt->mroute6_sk && !ns_capable(net->user_ns, CAP_NET_ADMIN)) return -EACCES; } switch (optname) { case MRT6_INIT: if (optlen < sizeof(int)) return -EINVAL; return ip6mr_sk_init(mrt, sk); case MRT6_DONE: return ip6mr_sk_done(sk); case MRT6_ADD_MIF: if (optlen < sizeof(vif)) return -EINVAL; if (copy_from_user(&vif, optval, sizeof(vif))) return -EFAULT; if (vif.mif6c_mifi >= MAXMIFS) return -ENFILE; rtnl_lock(); ret = mif6_add(net, mrt, &vif, sk == mrt->mroute6_sk); rtnl_unlock(); return ret; case MRT6_DEL_MIF: if (optlen < sizeof(mifi_t)) return -EINVAL; if (copy_from_user(&mifi, optval, sizeof(mifi_t))) return -EFAULT; rtnl_lock(); ret = mif6_delete(mrt, mifi, 0, NULL); rtnl_unlock(); return ret; /* * Manipulate the forwarding caches. These live * in a sort of kernel/user symbiosis. */ case MRT6_ADD_MFC: case MRT6_DEL_MFC: parent = -1; case MRT6_ADD_MFC_PROXY: case MRT6_DEL_MFC_PROXY: if (optlen < sizeof(mfc)) return -EINVAL; if (copy_from_user(&mfc, optval, sizeof(mfc))) return -EFAULT; if (parent == 0) parent = mfc.mf6cc_parent; rtnl_lock(); if (optname == MRT6_DEL_MFC || optname == MRT6_DEL_MFC_PROXY) ret = ip6mr_mfc_delete(mrt, &mfc, parent); else ret = ip6mr_mfc_add(net, mrt, &mfc, sk == mrt->mroute6_sk, parent); rtnl_unlock(); return ret; /* * Control PIM assert (to activate pim will activate assert) */ case MRT6_ASSERT: { int v; if (optlen != sizeof(v)) return -EINVAL; if (get_user(v, (int __user *)optval)) return -EFAULT; mrt->mroute_do_assert = v; return 0; } #ifdef CONFIG_IPV6_PIMSM_V2 case MRT6_PIM: { int v; if (optlen != sizeof(v)) return -EINVAL; if (get_user(v, (int __user *)optval)) return -EFAULT; v = !!v; rtnl_lock(); ret = 0; if (v != mrt->mroute_do_pim) { mrt->mroute_do_pim = v; mrt->mroute_do_assert = v; } rtnl_unlock(); return ret; } #endif #ifdef CONFIG_IPV6_MROUTE_MULTIPLE_TABLES case MRT6_TABLE: { u32 v; if (optlen != sizeof(u32)) return -EINVAL; if (get_user(v, (u32 __user *)optval)) return -EFAULT; /* "pim6reg%u" should not exceed 16 bytes (IFNAMSIZ) */ if (v != RT_TABLE_DEFAULT && v >= 100000000) return -EINVAL; if (sk == mrt->mroute6_sk) return -EBUSY; rtnl_lock(); ret = 0; if (!ip6mr_new_table(net, v)) ret = -ENOMEM; raw6_sk(sk)->ip6mr_table = v; rtnl_unlock(); return ret; } #endif /* * Spurious command, or MRT6_VERSION which you cannot * set. */ default: return -ENOPROTOOPT; } }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明39058.73%211.76%
Patrick McHardy13820.78%211.76%
Nicolas Dichtel355.27%15.88%
Joe Perches263.92%15.88%
Benjamin Thery263.92%211.76%
Xin Long213.16%15.88%
Dan Carpenter152.26%15.88%
Eric W. Biedermann50.75%15.88%
Rami Rosen20.30%211.76%
Eric Dumazet20.30%15.88%
Nikolay Aleksandrov20.30%15.88%
David S. Miller10.15%15.88%
Ian Morris10.15%15.88%
Total664100.00%17100.00%

/* * Getsock opt support for the multicast routing system. */
int ip6_mroute_getsockopt(struct sock *sk, int optname, char __user *optval, int __user *optlen) { int olr; int val; struct net *net = sock_net(sk); struct mr6_table *mrt; if (sk->sk_type != SOCK_RAW || inet_sk(sk)->inet_num != IPPROTO_ICMPV6) return -EOPNOTSUPP; mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); if (!mrt) return -ENOENT; switch (optname) { case MRT6_VERSION: val = 0x0305; break; #ifdef CONFIG_IPV6_PIMSM_V2 case MRT6_PIM: val = mrt->mroute_do_pim; break; #endif case MRT6_ASSERT: val = mrt->mroute_do_assert; break; default: return -ENOPROTOOPT; } if (get_user(olr, optlen)) return -EFAULT; olr = min_t(int, olr, sizeof(int)); if (olr < 0) return -EINVAL; if (put_user(olr, optlen)) return -EFAULT; if (copy_to_user(optval, &val, olr)) return -EFAULT; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明13867.65%228.57%
Patrick McHardy3215.69%228.57%
Xin Long2110.29%114.29%
Benjamin Thery125.88%114.29%
Ian Morris10.49%114.29%
Total204100.00%7100.00%

/* * The IP multicast ioctl support routines. */
int ip6mr_ioctl(struct sock *sk, int cmd, void __user *arg) { struct sioc_sg_req6 sr; struct sioc_mif_req6 vr; struct mif_device *vif; struct mfc6_cache *c; struct net *net = sock_net(sk); struct mr6_table *mrt; mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); if (!mrt) return -ENOENT; switch (cmd) { case SIOCGETMIFCNT_IN6: if (copy_from_user(&vr, arg, sizeof(vr))) return -EFAULT; if (vr.mifi >= mrt->maxvif) return -EINVAL; read_lock(&mrt_lock); vif = &mrt->vif6_table[vr.mifi]; if (MIF_EXISTS(mrt, vr.mifi)) { vr.icount = vif->pkt_in; vr.ocount = vif->pkt_out; vr.ibytes = vif->bytes_in; vr.obytes = vif->bytes_out; read_unlock(&mrt_lock); if (copy_to_user(arg, &vr, sizeof(vr))) return -EFAULT; return 0; } read_unlock(&mrt_lock); return -EADDRNOTAVAIL; case SIOCGETSGCNT_IN6: if (copy_from_user(&sr, arg, sizeof(sr))) return -EFAULT; read_lock(&mrt_lock); c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr); if (c) { sr.pktcnt = c->mfc_un.res.pkt; sr.bytecnt = c->mfc_un.res.bytes; sr.wrong_if = c->mfc_un.res.wrong_if; read_unlock(&mrt_lock); if (copy_to_user(arg, &sr, sizeof(sr))) return -EFAULT; return 0; } read_unlock(&mrt_lock); return -EADDRNOTAVAIL; default: return -ENOIOCTLCMD; } }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明30586.16%116.67%
Patrick McHardy349.60%233.33%
Benjamin Thery143.95%233.33%
Ian Morris10.28%116.67%
Total354100.00%6100.00%

#ifdef CONFIG_COMPAT struct compat_sioc_sg_req6 { struct sockaddr_in6 src; struct sockaddr_in6 grp; compat_ulong_t pktcnt; compat_ulong_t bytecnt; compat_ulong_t wrong_if; }; struct compat_sioc_mif_req6 { mifi_t mifi; compat_ulong_t icount; compat_ulong_t ocount; compat_ulong_t ibytes; compat_ulong_t obytes; };
int ip6mr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg) { struct compat_sioc_sg_req6 sr; struct compat_sioc_mif_req6 vr; struct mif_device *vif; struct mfc6_cache *c; struct net *net = sock_net(sk); struct mr6_table *mrt; mrt = ip6mr_get_table(net, raw6_sk(sk)->ip6mr_table ? : RT6_TABLE_DFLT); if (!mrt) return -ENOENT; switch (cmd) { case SIOCGETMIFCNT_IN6: if (copy_from_user(&vr, arg, sizeof(vr))) return -EFAULT; if (vr.mifi >= mrt->maxvif) return -EINVAL; read_lock(&mrt_lock); vif = &mrt->vif6_table[vr.mifi]; if (MIF_EXISTS(mrt, vr.mifi)) { vr.icount = vif->pkt_in; vr.ocount = vif->pkt_out; vr.ibytes = vif->bytes_in; vr.obytes = vif->bytes_out; read_unlock(&mrt_lock); if (copy_to_user(arg, &vr, sizeof(vr))) return -EFAULT; return 0; } read_unlock(&mrt_lock); return -EADDRNOTAVAIL; case SIOCGETSGCNT_IN6: if (copy_from_user(&sr, arg, sizeof(sr))) return -EFAULT; read_lock(&mrt_lock); c = ip6mr_cache_find(mrt, &sr.src.sin6_addr, &sr.grp.sin6_addr); if (c) { sr.pktcnt = c->mfc_un.res.pkt; sr.bytecnt = c->mfc_un.res.bytes; sr.wrong_if = c->mfc_un.res.wrong_if; read_unlock(&mrt_lock); if (copy_to_user(arg, &sr, sizeof(sr))) return -EFAULT; return 0; } read_unlock(&mrt_lock); return -EADDRNOTAVAIL; default: return -ENOIOCTLCMD; } }

Contributors

PersonTokensPropCommitsCommitProp
David S. Miller35499.72%150.00%
Ian Morris10.28%150.00%
Total355100.00%2100.00%

#endif
static inline int ip6mr_forward2_finish(struct net *net, struct sock *sk, struct sk_buff *skb) { __IP6_INC_STATS(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_OUTFORWDATAGRAMS); __IP6_ADD_STATS(net, ip6_dst_idev(skb_dst(skb)), IPSTATS_MIB_OUTOCTETS, skb->len); return dst_output(net, sk, skb); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明1725.76%19.09%
Vincent Bernat1725.76%19.09%
Eric W. Biedermann1116.67%436.36%
Rami Rosen812.12%19.09%
David S. Miller710.61%19.09%
Eric Dumazet57.58%218.18%
Denis V. Lunev11.52%19.09%
Total66100.00%11100.00%

/* * Processing handlers for ip6mr_forward */
static int ip6mr_forward2(struct net *net, struct mr6_table *mrt, struct sk_buff *skb, struct mfc6_cache *c, int vifi) { struct ipv6hdr *ipv6h; struct mif_device *vif = &mrt->vif6_table[vifi]; struct net_device *dev; struct dst_entry *dst; struct flowi6 fl6; if (!vif->dev) goto out_free; #ifdef CONFIG_IPV6_PIMSM_V2 if (vif->flags & MIFF_REGISTER) { vif->pkt_out++; vif->bytes_out += skb->len; vif->dev->stats.tx_bytes += skb->len; vif->dev->stats.tx_packets++; ip6mr_cache_report(mrt, skb, vifi, MRT6MSG_WHOLEPKT); goto out_free; } #endif ipv6h = ipv6_hdr(skb); fl6 = (struct flowi6) { .flowi6_oif = vif->link, .daddr = ipv6h->daddr, }; dst = ip6_route_output(net, NULL, &fl6); if (dst->error) { dst_release(dst); goto out_free; } skb_dst_drop(skb); skb_dst_set(skb, dst); /* * RFC1584 teaches, that DVMRP/PIM router must deliver packets locally * not only before forwarding, but after forwarding on all output * interfaces. It is clear, if mrouter runs a multicasting * program, it should receive packets not depending to what interface * program is joined. * If we will not make it, the program will have to join on all * interfaces. On the other hand, multihoming host (or router, but * not mrouter) cannot join to more than one interface - it will * result in receiving multiple packets. */ dev = vif->dev; skb->dev = dev; vif->pkt_out++; vif->bytes_out += skb->len; /* We are about to write */ /* XXX: extension headers? */ if (skb_cow(skb, sizeof(*ipv6h) + LL_RESERVED_SPACE(dev))) goto out_free; ipv6h = ipv6_hdr(skb); ipv6h->hop_limit--; IP6CB(skb)->flags |= IP6SKB_FORWARDED; return NF_HOOK(NFPROTO_IPV6, NF_INET_FORWARD, net, NULL, skb, skb->dev, dev, ip6mr_forward2_finish); out_free: kfree_skb(skb); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明25583.61%213.33%
Patrick McHardy123.93%213.33%
Li RongQing92.95%16.67%
David S. Miller92.95%213.33%
Eric Dumazet51.64%16.67%
Pavel Emelyanov41.31%16.67%
Ilpo Järvinen30.98%16.67%
Benjamin Thery30.98%16.67%
Eric W. Biedermann20.66%16.67%
Changli Gao10.33%16.67%
Jan Engelhardt10.33%16.67%
Ian Morris10.33%16.67%
Total305100.00%15100.00%


static int ip6mr_find_vif(struct mr6_table *mrt, struct net_device *dev) { int ct; for (ct = mrt->maxvif - 1; ct >= 0; ct--) { if (mrt->vif6_table[ct].dev == dev) break; } return ct; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明4683.64%133.33%
Patrick McHardy712.73%133.33%
Benjamin Thery23.64%133.33%
Total55100.00%3100.00%


static void ip6_mr_forward(struct net *net, struct mr6_table *mrt, struct sk_buff *skb, struct mfc6_cache *cache) { int psend = -1; int vif, ct; int true_vifi = ip6mr_find_vif(mrt, skb->dev); vif = cache->mf6c_parent; cache->mfc_un.res.pkt++; cache->mfc_un.res.bytes += skb->len; cache->mfc_un.res.lastuse = jiffies; if (ipv6_addr_any(&cache->mf6c_origin) && true_vifi >= 0) { struct mfc6_cache *cache_proxy; /* For an (*,G) entry, we only check that the incoming * interface is part of the static tree. */ cache_proxy = ip6mr_cache_find_any_parent(mrt, vif); if (cache_proxy && cache_proxy->mfc_un.res.ttls[true_vifi] < 255) goto forward; } /* * Wrong interface: drop packet and (maybe) send PIM assert. */ if (mrt->vif6_table[vif].dev != skb->dev) { cache->mfc_un.res.wrong_if++; if (true_vifi >= 0 && mrt->mroute_do_assert && /* pimsm uses asserts, when switching from RPT to SPT, so that we cannot check that packet arrived on an oif. It is bad, but otherwise we would need to move pretty large chunk of pimd to kernel. Ough... --ANK */ (mrt->mroute_do_pim || cache->mfc_un.res.ttls[true_vifi] < 255) && time_after(jiffies, cache->mfc_un.res.last_assert + MFC_ASSERT_THRESH)) { cache->mfc_un.res.last_assert = jiffies; ip6mr_cache_report(mrt, skb, true_vifi, MRT6MSG_WRONGMIF); } goto dont_forward; } forward: mrt->vif6_table[vif].pkt_in++; mrt->vif6_table[vif].bytes_in += skb->len; /* * Forward the frame */ if (ipv6_addr_any(&cache->mf6c_origin) && ipv6_addr_any(&cache->mf6c_mcastgrp)) { if (true_vifi >= 0 && true_vifi != cache->mf6c_parent && ipv6_hdr(skb)->hop_limit > cache->mfc_un.res.ttls[cache->mf6c_parent]) { /* It's an (*,*) entry and the packet is not coming from * the upstream: forward the packet to the upstream * only. */ psend = cache->mf6c_parent; goto last_forward; } goto dont_forward; } for (ct = cache->mfc_un.res.maxvif - 1; ct >= cache->mfc_un.res.minvif; ct--) { /* For (*,G) entry, don't forward to the incoming interface */ if ((!ipv6_addr_any(&cache->mf6c_origin) || ct != true_vifi) && ipv6_hdr(skb)->hop_limit > cache->mfc_un.res.ttls[ct]) { if (psend != -1) { struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); if (skb2) ip6mr_forward2(net, mrt, skb2, cache, psend); } psend = ct; } } last_forward: if (psend != -1) { ip6mr_forward2(net, mrt, skb, cache, psend); return; } dont_forward: kfree_skb(skb); }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明27759.06%222.22%
Nicolas Dichtel14931.77%111.11%
Patrick McHardy245.12%222.22%
Nikolay Aleksandrov102.13%111.11%
Benjamin Thery61.28%111.11%
Rami Rosen20.43%111.11%
Fabian Frederick10.21%111.11%
Total469100.00%9100.00%

/* * Multicast packets for forwarding arrive here */
int ip6_mr_input(struct sk_buff *skb) { struct mfc6_cache *cache; struct net *net = dev_net(skb->dev); struct mr6_table *mrt; struct flowi6 fl6 = { .flowi6_iif = skb->dev->ifindex, .flowi6_mark = skb->mark, }; int err; err = ip6mr_fib_lookup(net, &fl6, &mrt); if (err < 0) { kfree_skb(skb); return err; } read_lock(&mrt_lock); cache = ip6mr_cache_find(mrt, &ipv6_hdr(skb)->saddr, &ipv6_hdr(skb)->daddr); if (!cache) { int vif = ip6mr_find_vif(mrt, skb->dev); if (vif >= 0) cache = ip6mr_cache_find_any(mrt, &ipv6_hdr(skb)->daddr, vif); } /* * No usable cache entry */ if (!cache) { int vif; vif = ip6mr_find_vif(mrt, skb->dev); if (vif >= 0) { int err = ip6mr_cache_unresolved(mrt, vif, skb); read_unlock(&mrt_lock); return err; } read_unlock(&mrt_lock); kfree_skb(skb); return -ENODEV; } ip6_mr_forward(net, mrt, skb, cache); read_unlock(&mrt_lock); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明11948.97%111.11%
Patrick McHardy5522.63%333.33%
Nicolas Dichtel4116.87%111.11%
Benjamin Thery145.76%111.11%
Ben Greear72.88%111.11%
David S. Miller52.06%111.11%
Ian Morris20.82%111.11%
Total243100.00%9100.00%


static int __ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, struct mfc6_cache *c, struct rtmsg *rtm) { struct rta_mfc_stats mfcs; struct nlattr *mp_attr; struct rtnexthop *nhp; unsigned long lastuse; int ct; /* If cache is unresolved, don't try to parse IIF and OIF */ if (c->mf6c_parent >= MAXMIFS) { rtm->rtm_flags |= RTNH_F_UNRESOLVED; return -ENOENT; } if (MIF_EXISTS(mrt, c->mf6c_parent) && nla_put_u32(skb, RTA_IIF, mrt->vif6_table[c->mf6c_parent].dev->ifindex) < 0) return -EMSGSIZE; mp_attr = nla_nest_start(skb, RTA_MULTIPATH); if (!mp_attr) return -EMSGSIZE; for (ct = c->mfc_un.res.minvif; ct < c->mfc_un.res.maxvif; ct++) { if (MIF_EXISTS(mrt, ct) && c->mfc_un.res.ttls[ct] < 255) { nhp = nla_reserve_nohdr(skb, sizeof(*nhp)); if (!nhp) { nla_nest_cancel(skb, mp_attr); return -EMSGSIZE; } nhp->rtnh_flags = 0; nhp->rtnh_hops = c->mfc_un.res.ttls[ct]; nhp->rtnh_ifindex = mrt->vif6_table[ct].dev->ifindex; nhp->rtnh_len = sizeof(*nhp); } } nla_nest_end(skb, mp_attr); lastuse = READ_ONCE(c->mfc_un.res.lastuse); lastuse = time_after_eq(jiffies, lastuse) ? jiffies - lastuse : 0; mfcs.mfcs_packets = c->mfc_un.res.pkt; mfcs.mfcs_bytes = c->mfc_un.res.bytes; mfcs.mfcs_wrong_if = c->mfc_un.res.wrong_if; if (nla_put_64bit(skb, RTA_MFC_STATS, sizeof(mfcs), &mfcs, RTA_PAD) || nla_put_u64_64bit(skb, RTA_EXPIRES, jiffies_to_clock_t(lastuse), RTA_PAD)) return -EMSGSIZE; rtm->rtm_type = RTN_MULTICAST; return 1; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明15742.66%212.50%
Nicolas Dichtel12634.24%425.00%
Nikolay Aleksandrov6216.85%318.75%
Patrick McHardy102.72%318.75%
Thomas Graf92.45%16.25%
Ian Morris20.54%16.25%
Dan Carpenter10.27%16.25%
Benjamin Thery10.27%16.25%
Total368100.00%16100.00%


int ip6mr_get_route(struct net *net, struct sk_buff *skb, struct rtmsg *rtm, u32 portid) { int err; struct mr6_table *mrt; struct mfc6_cache *cache; struct rt6_info *rt = (struct rt6_info *)skb_dst(skb); mrt = ip6mr_get_table(net, RT6_TABLE_DFLT); if (!mrt) return -ENOENT; read_lock(&mrt_lock); cache = ip6mr_cache_find(mrt, &rt->rt6i_src.addr, &rt->rt6i_dst.addr); if (!cache && skb->dev) { int vif = ip6mr_find_vif(mrt, skb->dev); if (vif >= 0) cache = ip6mr_cache_find_any(mrt, &rt->rt6i_dst.addr, vif); } if (!cache) { struct sk_buff *skb2; struct ipv6hdr *iph; struct net_device *dev; int vif; dev = skb->dev; if (!dev || (vif = ip6mr_find_vif(mrt, dev)) < 0) { read_unlock(&mrt_lock); return -ENODEV; } /* really correct? */ skb2 = alloc_skb(sizeof(struct ipv6hdr), GFP_ATOMIC); if (!skb2) { read_unlock(&mrt_lock); return -ENOMEM; } NETLINK_CB(skb2).portid = portid; skb_reset_transport_header(skb2); skb_put(skb2, sizeof(struct ipv6hdr)); skb_reset_network_header(skb2); iph = ipv6_hdr(skb2); iph->version = 0; iph->priority = 0; iph->flow_lbl[0] = 0; iph->flow_lbl[1] = 0; iph->flow_lbl[2] = 0; iph->payload_len = 0; iph->nexthdr = IPPROTO_NONE; iph->hop_limit = 0; iph->saddr = rt->rt6i_src.addr; iph->daddr = rt->rt6i_dst.addr; err = ip6mr_cache_unresolved(mrt, vif, skb2); read_unlock(&mrt_lock); return err; } if (rtm->rtm_flags & RTM_F_NOTIFY) cache->mfc_flags |= MFC_NOTIFY; err = __ip6mr_fill_mroute(mrt, skb, cache, rtm); read_unlock(&mrt_lock); return err; }

Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明30475.43%19.09%
Nicolas Dichtel4511.17%19.09%
Patrick McHardy297.20%436.36%
Nikolay Aleksandrov112.73%19.09%
Benjamin Thery71.74%19.09%
Eric Dumazet30.74%19.09%
Alexey Dobriyan20.50%19.09%
Ian Morris20.50%19.09%
Total403100.00%11100.00%


static int ip6mr_fill_mroute(struct mr6_table *mrt, struct sk_buff *skb, u32 portid, u32 seq, struct mfc6_cache *c, int cmd, int flags) { struct nlmsghdr *nlh; struct rtmsg *rtm; int err; nlh = nlmsg_put(skb, portid, seq, cmd, sizeof(*rtm), flags); if (!nlh) return -EMSGSIZE; rtm = nlmsg_data(nlh); rtm->rtm_family = RTNL_FAMILY_IP6MR; rtm->rtm_dst_len = 128; rtm->rtm_src_len = 128; rtm->rtm_tos = 0; rtm->rtm_table = mrt->id; if (nla_put_u32(skb, RTA_TABLE, mrt->id)) goto nla_put_failure; rtm->rtm_type = RTN_MULTICAST; rtm->rtm_scope = RT_SCOPE_UNIVERSE; if (c->mfc_flags & MFC_STATIC) rtm->rtm_protocol = RTPROT_STATIC; else rtm->rtm_protocol = RTPROT_MROUTED; rtm->rtm_flags = 0; if (nla_put_in6_addr(skb, RTA_SRC, &c->mf6c_origin) || nla_put_in6_addr(skb, RTA_DST, &c->mf6c_mcastgrp)) goto nla_put_failure; err = __ip6mr_fill_mroute(mrt, skb, c, rtm); /* do not break the dump if cache is unresolved */ if (err < 0 && err != -ENOENT) goto nla_put_failure; nlmsg_end(skb, nlh); return 0; nla_put_failure: nlmsg_cancel(skb, nlh); return -EMSGSIZE; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy18272.80%19.09%
Nicolas Dichtel4618.40%545.45%
David S. Miller145.60%19.09%
Johannes Berg31.20%19.09%
Jiri Benc20.80%19.09%
Eric W. Biedermann20.80%19.09%
Ian Morris10.40%19.09%
Total250100.00%11100.00%


static int mr6_msgsize(bool unresolved, int maxvif) { size_t len = NLMSG_ALIGN(sizeof(struct rtmsg)) + nla_total_size(4) /* RTA_TABLE */ + nla_total_size(sizeof(struct in6_addr)) /* RTA_SRC */ + nla_total_size(sizeof(struct in6_addr)) /* RTA_DST */ ; if (!unresolved) len = len + nla_total_size(4) /* RTA_IIF */ + nla_total_size(0) /* RTA_MULTIPATH */ + maxvif * NLA_ALIGN(sizeof(struct rtnexthop)) /* RTA_MFC_STATS */ + nla_total_size_64bit(sizeof(struct rta_mfc_stats)) ; return len; }

Contributors

PersonTokensPropCommitsCommitProp
Nicolas Dichtel95100.00%2100.00%
Total95100.00%2100.00%


static void mr6_netlink_event(struct mr6_table *mrt, struct mfc6_cache *mfc, int cmd) { struct net *net = read_pnet(&mrt->net); struct sk_buff *skb; int err = -ENOBUFS; skb = nlmsg_new(mr6_msgsize(mfc->mf6c_parent >= MAXMIFS, mrt->maxvif), GFP_ATOMIC); if (!skb) goto errout; err = ip6mr_fill_mroute(mrt, skb, 0, 0, mfc, cmd, 0); if (err < 0) goto errout; rtnl_notify(skb, net, 0, RTNLGRP_IPV6_MROUTE, NULL, GFP_ATOMIC); return; errout: kfree_skb(skb); if (err < 0) rtnl_set_sk_err(net, RTNLGRP_IPV6_MROUTE, err); }

Contributors

PersonTokensPropCommitsCommitProp
Nicolas Dichtel13699.27%266.67%
Ian Morris10.73%133.33%
Total137100.00%3100.00%


static int ip6mr_rtm_dumproute(struct sk_buff *skb, struct netlink_callback *cb) { struct net *net = sock_net(skb->sk); struct mr6_table *mrt; struct mfc6_cache *mfc; unsigned int t = 0, s_t; unsigned int h = 0, s_h; unsigned int e = 0, s_e; s_t = cb->args[0]; s_h = cb->args[1]; s_e = cb->args[2]; read_lock(&mrt_lock); ip6mr_for_each_table(mrt, net) { if (t < s_t) goto next_table; if (t > s_t) s_h = 0; for (h = s_h; h < MFC6_LINES; h++) { list_for_each_entry(mfc, &mrt->mfc6_cache_array[h], list) { if (e < s_e) goto next_entry; if (ip6mr_fill_mroute(mrt, skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, mfc, RTM_NEWROUTE, NLM_F_MULTI) < 0) goto done; next_entry: e++; } e = s_e = 0; } spin_lock_bh(&mfc_unres_lock); list_for_each_entry(mfc, &mrt->mfc6_unres_queue, list) { if (e < s_e) goto next_entry2; if (ip6mr_fill_mroute(mrt, skb, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, mfc, RTM_NEWROUTE, NLM_F_MULTI) < 0) { spin_unlock_bh(&mfc_unres_lock); goto done; } next_entry2: e++; } spin_unlock_bh(&mfc_unres_lock); e = s_e = 0; s_h = 0; next_table: t++; } done: read_unlock(&mrt_lock); cb->args[2] = e; cb->args[1] = h; cb->args[0] = t; return skb->len; }

Contributors

PersonTokensPropCommitsCommitProp
Patrick McHardy24673.21%120.00%
Nicolas Dichtel8926.49%360.00%
Eric W. Biedermann10.30%120.00%
Total336100.00%5100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Hideaki Yoshifuji / 吉藤英明626651.79%32.36%
Patrick McHardy272922.56%86.30%
Nicolas Dichtel121110.01%1411.02%
Benjamin Thery5724.73%118.66%
David S. Miller4653.84%53.94%
Thomas Goff1591.31%32.36%
Nikolay Aleksandrov1271.05%86.30%
Wang Chen1020.84%32.36%
Eric Dumazet860.71%86.30%
Xin Long420.35%10.79%
Joe Perches360.30%53.94%
Rami Rosen270.22%43.15%
Hannes Frederic Sowa260.21%21.57%
Gao Feng250.21%21.57%
Ian Morris240.20%10.79%
Eric W. Biedermann240.20%86.30%
Stephen Hemminger200.17%43.15%
Duan Jiong200.17%10.79%
Vincent Bernat170.14%10.79%
Dan Carpenter160.13%21.57%
Ben Greear140.12%21.57%
Li RongQing90.07%10.79%
Thomas Graf90.07%10.79%
Pavel Emelyanov90.07%10.79%
Alexey Dobriyan70.06%21.57%
Richard Laing60.05%10.79%
Américo Wang50.04%32.36%
Hong Zhi Guo50.04%10.79%
Paul Gortmaker30.02%10.79%
Jiri Pirko30.02%10.79%
Cong Wang30.02%10.79%
Julian Anastasov30.02%10.79%
Johannes Berg30.02%10.79%
Dave Jones30.02%10.79%
Ilpo Järvinen30.02%10.79%
Tejun Heo30.02%10.79%
Tom Gundersen20.02%10.79%
Greg Rose20.02%10.79%
Jiri Benc20.02%10.79%
Harvey Harrison20.02%10.79%
Changli Gao10.01%10.79%
Jan Engelhardt10.01%10.79%
James Morris10.01%10.79%
Cesar Eduardo Barros10.01%10.79%
Andi Kleen10.01%10.79%
Fabian Frederick10.01%10.79%
Linus Torvalds10.01%10.79%
Denis V. Lunev10.01%10.79%
Al Viro10.01%10.79%
Total12099100.00%127100.00%
Directory: net/ipv6
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