xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ipv4, ipv6: kill ip_mc_{join, leave}_group and ipv6_sock_mc_{join, drop}

Browse Source 
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 <marcelo.leitner@gmail.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Marcelo Ricardo Leitner
2015-03-18 14:50:43 -03:00
committed by David S. Miller
parent baf606d9c9
commit 54ff9ef36b
11 changed files with 51 additions and 87 deletions
Download Patch File Download Diff File Expand all files Collapse all files

21
net/ipv4/ip_sockglue.c
View File

@@ -541,9 +541,18 @@ static bool setsockopt_needs_rtnl(int optname)
switch (optname) {
case IP_ADD_MEMBERSHIP:
case IP_ADD_SOURCE_MEMBERSHIP:
case IP_BLOCK_SOURCE:
case IP_DROP_MEMBERSHIP:
case IP_DROP_SOURCE_MEMBERSHIP:
case IP_MSFILTER:
case IP_UNBLOCK_SOURCE:
case MCAST_BLOCK_SOURCE:
case MCAST_MSFILTER:
case MCAST_JOIN_GROUP:
case MCAST_JOIN_SOURCE_GROUP:
case MCAST_LEAVE_GROUP:
case MCAST_LEAVE_SOURCE_GROUP:
case MCAST_UNBLOCK_SOURCE:
return true;
}
return false;
@@ -861,9 +870,9 @@ static int do_ip_setsockopt(struct sock *sk, int level,
}
if (optname == IP_ADD_MEMBERSHIP)
err = __ip_mc_join_group(sk, &mreq);
err = ip_mc_join_group(sk, &mreq);
else
err = __ip_mc_leave_group(sk, &mreq);
err = ip_mc_leave_group(sk, &mreq);
break;
}
case IP_MSFILTER:
@@ -928,7 +937,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
mreq.imr_multiaddr.s_addr = mreqs.imr_multiaddr;
mreq.imr_address.s_addr = mreqs.imr_interface;
mreq.imr_ifindex = 0;
err = __ip_mc_join_group(sk, &mreq);
err = ip_mc_join_group(sk, &mreq);
if (err && err != -EADDRINUSE)
break;
omode = MCAST_INCLUDE;
@@ -960,9 +969,9 @@ static int do_ip_setsockopt(struct sock *sk, int level,
mreq.imr_ifindex = greq.gr_interface;
if (optname == MCAST_JOIN_GROUP)
err = __ip_mc_join_group(sk, &mreq);
err = ip_mc_join_group(sk, &mreq);
else
err = __ip_mc_leave_group(sk, &mreq);
err = ip_mc_leave_group(sk, &mreq);
break;
}
case MCAST_JOIN_SOURCE_GROUP:
@@ -1005,7 +1014,7 @@ static int do_ip_setsockopt(struct sock *sk, int level,
mreq.imr_multiaddr = psin->sin_addr;
mreq.imr_address.s_addr = 0;
mreq.imr_ifindex = greqs.gsr_interface;
err = __ip_mc_join_group(sk, &mreq);
err = ip_mc_join_group(sk, &mreq);
if (err && err != -EADDRINUSE)
break;
greqs.gsr_interface = mreq.imr_ifindex;