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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/raw.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/raw.c')
-rw-r--r--net/ipv4/raw.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index a3d5ab786e81..6390ba299b3d 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -76,6 +76,7 @@
76#include <linux/seq_file.h> 76#include <linux/seq_file.h>
77#include <linux/netfilter.h> 77#include <linux/netfilter.h>
78#include <linux/netfilter_ipv4.h> 78#include <linux/netfilter_ipv4.h>
79#include <linux/compat.h>
79 80
80static struct raw_hashinfo raw_v4_hashinfo = { 81static struct raw_hashinfo raw_v4_hashinfo = {
81 .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock), 82 .lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock),
@@ -838,6 +839,23 @@ static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
838 } 839 }
839} 840}
840 841
842#ifdef CONFIG_COMPAT
843static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
844{
845 switch (cmd) {
846 case SIOCOUTQ:
847 case SIOCINQ:
848 return -ENOIOCTLCMD;
849 default:
850#ifdef CONFIG_IP_MROUTE
851 return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg));
852#else
853 return -ENOIOCTLCMD;
854#endif
855 }
856}
857#endif
858
841struct proto raw_prot = { 859struct proto raw_prot = {
842 .name = "RAW", 860 .name = "RAW",
843 .owner = THIS_MODULE, 861 .owner = THIS_MODULE,
@@ -860,6 +878,7 @@ struct proto raw_prot = {
860#ifdef CONFIG_COMPAT 878#ifdef CONFIG_COMPAT
861 .compat_setsockopt = compat_raw_setsockopt, 879 .compat_setsockopt = compat_raw_setsockopt,
862 .compat_getsockopt = compat_raw_getsockopt, 880 .compat_getsockopt = compat_raw_getsockopt,
881 .compat_ioctl = compat_raw_ioctl,
863#endif 882#endif
864}; 883};
865 884