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authorEric W. Biederman <ebiederm@xmission.com>2011-01-29 16:15:56 +0000
committerDavid S. Miller <davem@davemloft.net>2011-01-30 01:14:38 -0800
commit709b46e8d90badda1898caea50483c12af178e96 (patch)
tree799b57704dda3684777fb57a6e413dabac78858c /net
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')
-rw-r--r--net/ipv4/af_inet.c16
-rw-r--r--net/ipv4/ipmr.c46
-rw-r--r--net/ipv4/raw.c19
3 files changed, 81 insertions, 0 deletions
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index f2b61107df6..45b89d7bda5 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)
}
EXPORT_SYMBOL(inet_ioctl);
+#ifdef CONFIG_COMPAT
+int inet_compat_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
+{
+ struct sock *sk = sock->sk;
+ int err = -ENOIOCTLCMD;
+
+ if (sk->sk_prot->compat_ioctl)
+ err = sk->sk_prot->compat_ioctl(sk, cmd, arg);
+
+ return err;
+}
+#endif
+
const struct proto_ops inet_stream_ops = {
.family = PF_INET,
.owner = THIS_MODULE,
@@ -903,6 +916,7 @@ const struct proto_ops inet_stream_ops = {
#ifdef CONFIG_COMPAT
.compat_setsockopt = compat_sock_common_setsockopt,
.compat_getsockopt = compat_sock_common_getsockopt,
+ .compat_ioctl = inet_compat_ioctl,
#endif
};
EXPORT_SYMBOL(inet_stream_ops);
@@ -929,6 +943,7 @@ const struct proto_ops inet_dgram_ops = {
#ifdef CONFIG_COMPAT
.compat_setsockopt = compat_sock_common_setsockopt,
.compat_getsockopt = compat_sock_common_getsockopt,
+ .compat_ioctl = inet_compat_ioctl,
#endif
};
EXPORT_SYMBOL(inet_dgram_ops);
@@ -959,6 +974,7 @@ static const struct proto_ops inet_sockraw_ops = {
#ifdef CONFIG_COMPAT
.compat_setsockopt = compat_sock_common_setsockopt,
.compat_getsockopt = compat_sock_common_getsockopt,
+ .compat_ioctl = inet_compat_ioctl,
#endif
};
diff --git a/net/ipv4/ipmr.c b/net/ipv4/ipmr.c
index 3f3a9afd73e..7e41ac0b926 100644
--- a/net/ipv4/ipmr.c
+++ b/net/ipv4/ipmr.c
@@ -60,6 +60,7 @@
#include <linux/notifier.h>
#include <linux/if_arp.h>
#include <linux/netfilter_ipv4.h>
+#include <linux/compat.h>
#include <net/ipip.h>
#include <net/checksum.h>
#include <net/netlink.h>
@@ -1434,6 +1435,51 @@ int ipmr_ioctl(struct sock *sk, int cmd, void __user *arg)
}
}
+#ifdef CONFIG_COMPAT
+struct compat_sioc_sg_req {
+ struct in_addr src;
+ struct in_addr grp;
+ compat_ulong_t pktcnt;
+ compat_ulong_t bytecnt;
+ compat_ulong_t wrong_if;
+};
+
+int ipmr_compat_ioctl(struct sock *sk, unsigned int cmd, void __user *arg)
+{
+ struct sioc_sg_req sr;
+ struct mfc_cache *c;
+ struct net *net = sock_net(sk);
+ struct mr_table *mrt;
+
+ mrt = ipmr_get_table(net, raw_sk(sk)->ipmr_table ? : RT_TABLE_DEFAULT);
+ if (mrt == NULL)
+ return -ENOENT;
+
+ switch (cmd) {
+ case SIOCGETSGCNT:
+ if (copy_from_user(&sr, arg, sizeof(sr)))
+ return -EFAULT;
+
+ rcu_read_lock();
+ c = ipmr_cache_find(mrt, sr.src.s_addr, sr.grp.s_addr);
+ if (c) {
+ sr.pktcnt = c->mfc_un.res.pkt;
+ sr.bytecnt = c->mfc_un.res.bytes;
+ sr.wrong_if = c->mfc_un.res.wrong_if;
+ rcu_read_unlock();
+
+ if (copy_to_user(arg, &sr, sizeof(sr)))
+ return -EFAULT;
+ return 0;
+ }
+ rcu_read_unlock();
+ return -EADDRNOTAVAIL;
+ default:
+ return -ENOIOCTLCMD;
+ }
+}
+#endif
+
static int ipmr_device_event(struct notifier_block *this, unsigned long event, void *ptr)
{
diff --git a/net/ipv4/raw.c b/net/ipv4/raw.c
index a3d5ab786e8..6390ba299b3 100644
--- a/net/ipv4/raw.c
+++ b/net/ipv4/raw.c
@@ -76,6 +76,7 @@
#include <linux/seq_file.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
+#include <linux/compat.h>
static struct raw_hashinfo raw_v4_hashinfo = {
.lock = __RW_LOCK_UNLOCKED(raw_v4_hashinfo.lock),
@@ -838,6 +839,23 @@ static int raw_ioctl(struct sock *sk, int cmd, unsigned long arg)
}
}
+#ifdef CONFIG_COMPAT
+static int compat_raw_ioctl(struct sock *sk, unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case SIOCOUTQ:
+ case SIOCINQ:
+ return -ENOIOCTLCMD;
+ default:
+#ifdef CONFIG_IP_MROUTE
+ return ipmr_compat_ioctl(sk, cmd, compat_ptr(arg));
+#else
+ return -ENOIOCTLCMD;
+#endif
+ }
+}
+#endif
+
struct proto raw_prot = {
.name = "RAW",
.owner = THIS_MODULE,
@@ -860,6 +878,7 @@ struct proto raw_prot = {
#ifdef CONFIG_COMPAT
.compat_setsockopt = compat_raw_setsockopt,
.compat_getsockopt = compat_raw_getsockopt,
+ .compat_ioctl = compat_raw_ioctl,
#endif
};