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| author | Eric Dumazet <edumazet@google.com> | 2016-07-08 05:46:04 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-07-09 18:13:20 -0400 |
| commit | 927265bc6cd6374c9bafc43408ece4e92311b149 (patch) | |
| tree | 0d10190f17eea768f23c480f56c46e0166d335a1 /net/ipv6/ip6mr.c | |
| parent | fa17806cde76fb1087532f07e72aa757a30e0500 (diff) | |
| download | linux-927265bc6cd6374c9bafc43408ece4e92311b149.tar.gz linux-927265bc6cd6374c9bafc43408ece4e92311b149.tar.bz2 linux-927265bc6cd6374c9bafc43408ece4e92311b149.zip | |
ipv6: do not abuse GFP_ATOMIC in inet6_netconf_notify_devconf()
All inet6_netconf_notify_devconf() callers are in process context,
so we can use GFP_KERNEL allocations if we take care of not holding
a rwlock while not needed in ip6mr (we hold RTNL there)
Fixes: d67b8c616b48 ("netconf: advertise mc_forwarding status")
Fixes: f3a1bfb11ccb ("rtnl/ipv6: use netconf msg to advertise forwarding status")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Acked-by: Nicolas Dichtel <nicolas.dichtel@6wind.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6/ip6mr.c')
| -rw-r--r-- | net/ipv6/ip6mr.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/net/ipv6/ip6mr.c b/net/ipv6/ip6mr.c index 487ef3bc7bbc..c7ca0f5d1a3b 100644 --- a/net/ipv6/ip6mr.c +++ b/net/ipv6/ip6mr.c @@ -1592,14 +1592,15 @@ static int ip6mr_sk_init(struct mr6_table *mrt, struct sock *sk) if (likely(mrt->mroute6_sk == NULL)) { mrt->mroute6_sk = sk; net->ipv6.devconf_all->mc_forwarding++; - inet6_netconf_notify_devconf(net, NETCONFA_MC_FORWARDING, - NETCONFA_IFINDEX_ALL, - net->ipv6.devconf_all); - } - else + } 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; @@ -1617,11 +1618,11 @@ int ip6mr_sk_done(struct sock *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); - write_unlock_bh(&mrt_lock); mroute_clean_tables(mrt, false); err = 0; |