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Message-Id: <1424672814-2998-2-git-send-email-challa@noironetworks.com> Date: Sun, 22 Feb 2015 22:26:53 -0800 From: Madhu Challa <challa@...ronetworks.com> To: eric.dumazet@...il.com, davem@...emloft.net, netdev@...r.kernel.org Cc: Madhu Challa <challa@...ronetworks.com> Subject: [PATCH net-next v3 1/2] igmp v6: add __ipv6_sock_mc_join and __ipv6_sock_mc_drop Based on the igmp v4 changes from Eric Dumazet. 959d10f6bbf6ab5b8813c4e37540a2e43ca2ae96 These changes are needed to perform igmp v6 join/leave while RTNL is held. Make ipv6_sock_mc_join and ipv6_sock_mc_drop wrappers around __ipv6_sock_mc_join and __ipv6_sock_mc_drop to avoid proliferation of work queues. Signed-off-by: Madhu Challa <challa@...ronetworks.com> --- include/net/ipv6.h | 8 ++++++++ net/ipv6/mcast.c | 41 ++++++++++++++++++++++++++++++++--------- 2 files changed, 40 insertions(+), 9 deletions(-) diff --git a/include/net/ipv6.h b/include/net/ipv6.h index 4c9fe22..b767306 100644 --- a/include/net/ipv6.h +++ b/include/net/ipv6.h @@ -940,4 +940,12 @@ int ipv6_sysctl_register(void); void ipv6_sysctl_unregister(void); #endif +int ipv6_sock_mc_join(struct sock *sk, int ifindex, + const struct in6_addr *addr); +int __ipv6_sock_mc_join(struct sock *sk, int ifindex, + const struct in6_addr *addr); +int ipv6_sock_mc_drop(struct sock *sk, int ifindex, + const struct in6_addr *addr); +int __ipv6_sock_mc_drop(struct sock *sk, int ifindex, + const struct in6_addr *addr); #endif /* _NET_IPV6_H */ diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c index 5ce107c..f4a76b1 100644 --- a/net/ipv6/mcast.c +++ b/net/ipv6/mcast.c @@ -132,7 +132,7 @@ static int unsolicited_report_interval(struct inet6_dev *idev) return iv > 0 ? iv : 1; } -int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) +int __ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) { struct net_device *dev = NULL; struct ipv6_mc_socklist *mc_lst; @@ -140,6 +140,8 @@ int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) struct net *net = sock_net(sk); int err; + ASSERT_RTNL(); + if (!ipv6_addr_is_multicast(addr)) return -EINVAL; @@ -161,7 +163,6 @@ int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) mc_lst->next = NULL; mc_lst->addr = *addr; - rtnl_lock(); if (ifindex == 0) { struct rt6_info *rt; rt = rt6_lookup(net, addr, NULL, 0, 0); @@ -173,7 +174,6 @@ int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) dev = __dev_get_by_index(net, ifindex); if (dev == NULL) { - rtnl_unlock(); sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); return -ENODEV; } @@ -190,7 +190,6 @@ int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) err = ipv6_dev_mc_inc(dev, addr); if (err) { - rtnl_unlock(); sock_kfree_s(sk, mc_lst, sizeof(*mc_lst)); return err; } @@ -198,25 +197,38 @@ int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) mc_lst->next = np->ipv6_mc_list; rcu_assign_pointer(np->ipv6_mc_list, mc_lst); - rtnl_unlock(); return 0; } +EXPORT_SYMBOL(__ipv6_sock_mc_join); + +int ipv6_sock_mc_join(struct sock *sk, int ifindex, const struct in6_addr *addr) +{ + int ret; + + rtnl_lock(); + ret = __ipv6_sock_mc_join(sk, ifindex, addr); + rtnl_unlock(); + + return ret; +} +EXPORT_SYMBOL(ipv6_sock_mc_join); /* * socket leave on multicast group */ -int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) +int __ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) { struct ipv6_pinfo *np = inet6_sk(sk); struct ipv6_mc_socklist *mc_lst; struct ipv6_mc_socklist __rcu **lnk; struct net *net = sock_net(sk); + ASSERT_RTNL(); + if (!ipv6_addr_is_multicast(addr)) return -EINVAL; - rtnl_lock(); for (lnk = &np->ipv6_mc_list; (mc_lst = rtnl_dereference(*lnk)) != NULL; lnk = &mc_lst->next) { @@ -235,17 +247,28 @@ int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) __ipv6_dev_mc_dec(idev, &mc_lst->addr); } else (void) ip6_mc_leave_src(sk, mc_lst, NULL); - rtnl_unlock(); atomic_sub(sizeof(*mc_lst), &sk->sk_omem_alloc); kfree_rcu(mc_lst, rcu); return 0; } } - rtnl_unlock(); return -EADDRNOTAVAIL; } +EXPORT_SYMBOL(__ipv6_sock_mc_drop); + +int ipv6_sock_mc_drop(struct sock *sk, int ifindex, const struct in6_addr *addr) +{ + int ret; + + rtnl_lock(); + ret = __ipv6_sock_mc_drop(sk, ifindex, addr); + rtnl_unlock(); + + return ret; +} +EXPORT_SYMBOL(ipv6_sock_mc_drop); /* called with rcu_read_lock() */ static struct inet6_dev *ip6_mc_find_dev_rcu(struct net *net, -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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