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netlink: implement unbind to netlink_setsockopt NETLINK_DROP_MEMBERSHIP

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Call the per-protocol unbind function rather than bind function on
NETLINK_DROP_MEMBERSHIP in netlink_setsockopt().

Signed-off-by: Richard Guy Briggs <rgb@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Richard Guy Briggs 2014-04-22 21:31:55 -04:00 committed by David S. Miller
parent 4f52090052
commit 7774d5e03f
1 changed files with 3 additions and 1 deletions
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4
net/netlink/af_netlink.c
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@ -2129,7 +2129,7 @@ static int netlink_setsockopt(struct socket *sock, int level, int optname,
return err;
if (!val || val - 1 >= nlk->ngroups)
return -EINVAL;
if (nlk->netlink_bind) {
if (optname == NETLINK_ADD_MEMBERSHIP && nlk->netlink_bind) {
err = nlk->netlink_bind(val);
if (err)
return err;
@ -2138,6 +2138,8 @@ static int netlink_setsockopt(struct socket *sock, int level, int optname,
netlink_update_socket_mc(nlk, val,
optname == NETLINK_ADD_MEMBERSHIP);
netlink_table_ungrab();
if (optname == NETLINK_DROP_MEMBERSHIP && nlk->netlink_unbind)
nlk->netlink_unbind(val);
err = 0;
break;