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authorEric W. Biederman <ebiederm@xmission.com>2011-01-29 11:15:56 -0500
committerDavid S. Miller <davem@davemloft.net>2011-01-30 04:14:38 -0500
commit709b46e8d90badda1898caea50483c12af178e96 (patch)
tree799b57704dda3684777fb57a6e413dabac78858c /net/ipv4/af_inet.c
parent13ad17745c2cbd437d9e24b2d97393e0be11c439 (diff)
net: Add compat ioctl support for the ipv4 multicast ioctl SIOCGETSGCNT
SIOCGETSGCNT is not a unique ioctl value as it it maps tio SIOCPROTOPRIVATE +1, which unfortunately means the existing infrastructure for compat networking ioctls is insufficient. A trivial compact ioctl implementation would conflict with: SIOCAX25ADDUID SIOCAIPXPRISLT SIOCGETSGCNT_IN6 SIOCGETSGCNT SIOCRSSCAUSE SIOCX25SSUBSCRIP SIOCX25SDTEFACILITIES To make this work I have updated the compat_ioctl decode path to mirror the the normal ioctl decode path. I have added an ipv4 inet_compat_ioctl function so that I can have ipv4 specific compat ioctls. I have added a compat_ioctl function into struct proto so I can break out ioctls by which kind of ip socket I am using. I have added a compat_raw_ioctl function because SIOCGETSGCNT only works on raw sockets. I have added a ipmr_compat_ioctl that mirrors the normal ipmr_ioctl. This was necessary because unfortunately the struct layout for the SIOCGETSGCNT has unsigned longs in it so changes between 32bit and 64bit kernels. This change was sufficient to run a 32bit ip multicast routing daemon on a 64bit kernel. Reported-by: Bill Fenner <fenner@aristanetworks.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/af_inet.c')
-rw-r--r--net/ipv4/af_inet.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index f2b61107df6c..45b89d7bda5a 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -880,6 +880,19 @@ int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
880} 880}
881EXPORT_SYMBOL(inet_ioctl); 881EXPORT_SYMBOL(inet_ioctl);
882 882
883#ifdef CONFIG_COMPAT
884int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
885{
886 struct sock *sk = sock->sk;
887 int err = -ENOIOCTLCMD;
888
889 if (sk->sk_prot->compat_ioctl)
890 err = sk->sk_prot->compat_ioctl(sk, cmd, arg);
891
892 return err;
893}
894#endif
895
883const struct proto_ops inet_stream_ops = { 896const struct proto_ops inet_stream_ops = {
884 .family = PF_INET, 897 .family = PF_INET,
885 .owner = THIS_MODULE, 898 .owner = THIS_MODULE,
@@ -903,6 +916,7 @@ const struct proto_ops inet_stream_ops = {
903#ifdef CONFIG_COMPAT 916#ifdef CONFIG_COMPAT
904 .compat_setsockopt = compat_sock_common_setsockopt, 917 .compat_setsockopt = compat_sock_common_setsockopt,
905 .compat_getsockopt = compat_sock_common_getsockopt, 918 .compat_getsockopt = compat_sock_common_getsockopt,
919 .compat_ioctl = inet_compat_ioctl,
906#endif 920#endif
907}; 921};
908EXPORT_SYMBOL(inet_stream_ops); 922EXPORT_SYMBOL(inet_stream_ops);
@@ -929,6 +943,7 @@ const struct proto_ops inet_dgram_ops = {
929#ifdef CONFIG_COMPAT 943#ifdef CONFIG_COMPAT
930 .compat_setsockopt = compat_sock_common_setsockopt, 944 .compat_setsockopt = compat_sock_common_setsockopt,
931 .compat_getsockopt = compat_sock_common_getsockopt, 945 .compat_getsockopt = compat_sock_common_getsockopt,
946 .compat_ioctl = inet_compat_ioctl,
932#endif 947#endif
933}; 948};
934EXPORT_SYMBOL(inet_dgram_ops); 949EXPORT_SYMBOL(inet_dgram_ops);
@@ -959,6 +974,7 @@ static const struct proto_ops inet_sockraw_ops = {
959#ifdef CONFIG_COMPAT 974#ifdef CONFIG_COMPAT
960 .compat_setsockopt = compat_sock_common_setsockopt, 975 .compat_setsockopt = compat_sock_common_setsockopt,
961 .compat_getsockopt = compat_sock_common_getsockopt, 976 .compat_getsockopt = compat_sock_common_getsockopt,
977 .compat_ioctl = inet_compat_ioctl,
962#endif 978#endif
963}; 979};
964 980