diff options
Diffstat (limited to 'net/ipv6/ipv6_sockglue.c')
| -rw-r--r-- | net/ipv6/ipv6_sockglue.c | 35 |
1 files changed, 27 insertions, 8 deletions
diff --git a/net/ipv6/ipv6_sockglue.c b/net/ipv6/ipv6_sockglue.c index 8d766d9100cb..f2b731df8d77 100644 --- a/net/ipv6/ipv6_sockglue.c +++ b/net/ipv6/ipv6_sockglue.c @@ -117,6 +117,18 @@ struct ipv6_txoptions *ipv6_update_options(struct sock *sk, return opt; } +static bool setsockopt_needs_rtnl(int optname) +{ + switch (optname) { + case IPV6_ADD_MEMBERSHIP: + case IPV6_DROP_MEMBERSHIP: + case MCAST_JOIN_GROUP: + case MCAST_LEAVE_GROUP: + return true; + } + return false; +} + static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, char __user *optval, unsigned int optlen) { @@ -124,6 +136,7 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, struct net *net = sock_net(sk); int val, valbool; int retv = -ENOPROTOOPT; + bool needs_rtnl = setsockopt_needs_rtnl(optname); if (optval == NULL) val = 0; @@ -140,6 +153,8 @@ static int do_ipv6_setsockopt(struct sock *sk, int level, int optname, if (ip6_mroute_opt(optname)) return ip6_mroute_setsockopt(sk, optname, optval, optlen); + if (needs_rtnl) + rtnl_lock(); lock_sock(sk); switch (optname) { @@ -582,9 +597,9 @@ done: break; if (optname == IPV6_ADD_MEMBERSHIP) - retv = ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); + retv = __ipv6_sock_mc_join(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); else - retv = ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); + retv = __ipv6_sock_mc_drop(sk, mreq.ipv6mr_ifindex, &mreq.ipv6mr_multiaddr); break; } case IPV6_JOIN_ANYCAST: @@ -623,11 +638,11 @@ done: } psin6 = (struct sockaddr_in6 *)&greq.gr_group; if (optname == MCAST_JOIN_GROUP) - retv = ipv6_sock_mc_join(sk, greq.gr_interface, - &psin6->sin6_addr); + retv = __ipv6_sock_mc_join(sk, greq.gr_interface, + &psin6->sin6_addr); else - retv = ipv6_sock_mc_drop(sk, greq.gr_interface, - &psin6->sin6_addr); + retv = __ipv6_sock_mc_drop(sk, greq.gr_interface, + &psin6->sin6_addr); break; } case MCAST_JOIN_SOURCE_GROUP: @@ -659,8 +674,8 @@ done: struct sockaddr_in6 *psin6; psin6 = (struct sockaddr_in6 *)&greqs.gsr_group; - retv = ipv6_sock_mc_join(sk, greqs.gsr_interface, - &psin6->sin6_addr); + retv = __ipv6_sock_mc_join(sk, greqs.gsr_interface, + &psin6->sin6_addr); /* prior join w/ different source is ok */ if (retv && retv != -EADDRINUSE) break; @@ -837,11 +852,15 @@ pref_skip_coa: } release_sock(sk); + if (needs_rtnl) + rtnl_unlock(); return retv; e_inval: release_sock(sk); + if (needs_rtnl) + rtnl_unlock(); return -EINVAL; } |