From 54ff9ef36bdf84d469a098cbf8e2a103fbc77054 Mon Sep 17 00:00:00 2001 From: Marcelo Ricardo Leitner Date: Wed, 18 Mar 2015 14:50:43 -0300 Subject: ipv4, ipv6: kill ip_mc_{join, leave}_group and ipv6_sock_mc_{join, drop} in favor of their inner __ ones, which doesn't grab rtnl. As these functions need to operate on a locked socket, we can't be grabbing rtnl by then. It's too late and doing so causes reversed locking. So this patch: - move rtnl handling to callers instead while already fixing some reversed locking situations, like on vxlan and ipvs code. - renames __ ones to not have the __ mark: __ip_mc_{join,leave}_group -> ip_mc_{join,leave}_group __ipv6_sock_mc_{join,drop} -> ipv6_sock_mc_{join,drop} Signed-off-by: Marcelo Ricardo Leitner Acked-by: Hannes Frederic Sowa Signed-off-by: David S. Miller --- net/ipv4/igmp.c | 41 ++++++++--------------------------------- 1 file changed, 8 insertions(+), 33 deletions(-) (limited to 'net/ipv4/igmp.c') diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c index 5cb1ef4ce292..ad3f866085de 100644 --- a/net/ipv4/igmp.c +++ b/net/ipv4/igmp.c @@ -1850,7 +1850,10 @@ static void ip_mc_clear_src(struct ip_mc_list *pmc) pmc->sfcount[MCAST_EXCLUDE] = 1; } -int __ip_mc_join_group(struct sock *sk, struct ip_mreqn *imr) +/* Join a multicast group + */ + +int ip_mc_join_group(struct sock *sk, struct ip_mreqn *imr) { __be32 addr = imr->imr_multiaddr.s_addr; struct ip_mc_socklist *iml, *i; @@ -1898,20 +1901,6 @@ int __ip_mc_join_group(struct sock *sk, struct ip_mreqn *imr) done: return err; } -EXPORT_SYMBOL(__ip_mc_join_group); - -/* Join a multicast group - */ -int ip_mc_join_group(struct sock *sk, struct ip_mreqn *imr) -{ - int ret; - - rtnl_lock(); - ret = __ip_mc_join_group(sk, imr); - rtnl_unlock(); - - return ret; -} EXPORT_SYMBOL(ip_mc_join_group); static int ip_mc_leave_src(struct sock *sk, struct ip_mc_socklist *iml, @@ -1934,7 +1923,7 @@ static int ip_mc_leave_src(struct sock *sk, struct ip_mc_socklist *iml, return err; } -int __ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr) +int ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr) { struct inet_sock *inet = inet_sk(sk); struct ip_mc_socklist *iml; @@ -1979,18 +1968,6 @@ int __ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr) out: return ret; } -EXPORT_SYMBOL(__ip_mc_leave_group); - -int ip_mc_leave_group(struct sock *sk, struct ip_mreqn *imr) -{ - int ret; - - rtnl_lock(); - ret = __ip_mc_leave_group(sk, imr); - rtnl_unlock(); - - return ret; -} EXPORT_SYMBOL(ip_mc_leave_group); int ip_mc_source(int add, int omode, struct sock *sk, struct @@ -2010,7 +1987,7 @@ int ip_mc_source(int add, int omode, struct sock *sk, struct if (!ipv4_is_multicast(addr)) return -EINVAL; - rtnl_lock(); + ASSERT_RTNL(); imr.imr_multiaddr.s_addr = mreqs->imr_multiaddr; imr.imr_address.s_addr = mreqs->imr_interface; @@ -2124,9 +2101,8 @@ int ip_mc_source(int add, int omode, struct sock *sk, struct ip_mc_add_src(in_dev, &mreqs->imr_multiaddr, omode, 1, &mreqs->imr_sourceaddr, 1); done: - rtnl_unlock(); if (leavegroup) - return ip_mc_leave_group(sk, &imr); + err = ip_mc_leave_group(sk, &imr); return err; } @@ -2148,7 +2124,7 @@ int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf, int ifindex) msf->imsf_fmode != MCAST_EXCLUDE) return -EINVAL; - rtnl_lock(); + ASSERT_RTNL(); imr.imr_multiaddr.s_addr = msf->imsf_multiaddr; imr.imr_address.s_addr = msf->imsf_interface; @@ -2210,7 +2186,6 @@ int ip_mc_msfilter(struct sock *sk, struct ip_msfilter *msf, int ifindex) pmc->sfmode = msf->imsf_fmode; err = 0; done: - rtnl_unlock(); if (leavegroup) err = ip_mc_leave_group(sk, &imr); return err; -- cgit v1.2.3