[NET]: Add a dev_ioctl() fallback to sock_ioctl()
Currently all network protocols need to call dev_ioctl as the default
fallback in their ioctl implementations. This patch adds a fallback
to dev_ioctl to sock_ioctl if the protocol returned -ENOIOCTLCMD.
This way all the procotol ioctl handlers can be simplified and we don't
need to export dev_ioctl.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/appletalk/ddp.c b/net/appletalk/ddp.c
index 296f186..a5144e4 100644
--- a/net/appletalk/ddp.c
+++ b/net/appletalk/ddp.c
@@ -1763,7 +1763,7 @@
*/
static int atalk_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
- int rc = -EINVAL;
+ int rc = -ENOIOCTLCMD;
struct sock *sk = sock->sk;
void __user *argp = (void __user *)arg;
@@ -1813,23 +1813,6 @@
rc = atif_ioctl(cmd, argp);
rtnl_unlock();
break;
- /* Physical layer ioctl calls */
- case SIOCSIFLINK:
- case SIOCGIFHWADDR:
- case SIOCSIFHWADDR:
- case SIOCGIFFLAGS:
- case SIOCSIFFLAGS:
- case SIOCGIFTXQLEN:
- case SIOCSIFTXQLEN:
- case SIOCGIFMTU:
- case SIOCGIFCONF:
- case SIOCADDMULTI:
- case SIOCDELMULTI:
- case SIOCGIFCOUNT:
- case SIOCGIFINDEX:
- case SIOCGIFNAME:
- rc = dev_ioctl(cmd, argp);
- break;
}
return rc;
diff --git a/net/ax25/af_ax25.c b/net/ax25/af_ax25.c
index 8b5d10a..e8753c7 100644
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -1827,7 +1827,7 @@
break;
default:
- res = dev_ioctl(cmd, argp);
+ res = -ENOIOCTLCMD;
break;
}
release_sock(sk);
diff --git a/net/core/dev.c b/net/core/dev.c
index a5efc9a..29ba109 100644
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3276,7 +3276,6 @@
EXPORT_SYMBOL(dev_get_by_flags);
EXPORT_SYMBOL(dev_get_by_index);
EXPORT_SYMBOL(dev_get_by_name);
-EXPORT_SYMBOL(dev_ioctl);
EXPORT_SYMBOL(dev_open);
EXPORT_SYMBOL(dev_queue_xmit);
EXPORT_SYMBOL(dev_remove_pack);
diff --git a/net/decnet/af_decnet.c b/net/decnet/af_decnet.c
index 65e3bae..78ec534 100644
--- a/net/decnet/af_decnet.c
+++ b/net/decnet/af_decnet.c
@@ -1252,7 +1252,7 @@
break;
default:
- err = dev_ioctl(cmd, (void __user *)arg);
+ err = -ENOIOCTLCMD;
break;
}
diff --git a/net/econet/af_econet.c b/net/econet/af_econet.c
index 70fb2b8..4fc2452 100644
--- a/net/econet/af_econet.c
+++ b/net/econet/af_econet.c
@@ -687,7 +687,7 @@
break;
default:
- return dev_ioctl(cmd, argp);
+ return -ENOIOCTLCMD;
}
/*NOTREACHED*/
return 0;
diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 36a6306..966a071 100644
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -777,10 +777,10 @@
err = devinet_ioctl(cmd, (void __user *)arg);
break;
default:
- if (!sk->sk_prot->ioctl ||
- (err = sk->sk_prot->ioctl(sk, cmd, arg)) ==
- -ENOIOCTLCMD)
- err = dev_ioctl(cmd, (void __user *)arg);
+ if (sk->sk_prot->ioctl)
+ err = sk->sk_prot->ioctl(sk, cmd, arg);
+ else
+ err = -ENOIOCTLCMD;
break;
}
return err;
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 7c9f192..68afc53 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -434,7 +434,6 @@
int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
struct sock *sk = sock->sk;
- int err = -EINVAL;
switch(cmd)
{
@@ -453,10 +452,9 @@
case SIOCSIFDSTADDR:
return addrconf_set_dstaddr((void __user *) arg);
default:
- if (!sk->sk_prot->ioctl ||
- (err = sk->sk_prot->ioctl(sk, cmd, arg)) == -ENOIOCTLCMD)
- return(dev_ioctl(cmd,(void __user *) arg));
- return err;
+ if (!sk->sk_prot->ioctl)
+ return -ENOIOCTLCMD;
+ return sk->sk_prot->ioctl(sk, cmd, arg);
}
/*NOTREACHED*/
return(0);
diff --git a/net/ipx/af_ipx.c b/net/ipx/af_ipx.c
index 6c464c1..0dc519b 100644
--- a/net/ipx/af_ipx.c
+++ b/net/ipx/af_ipx.c
@@ -1884,7 +1884,7 @@
rc = -EINVAL;
break;
default:
- rc = dev_ioctl(cmd, argp);
+ rc = -ENOIOCTLCMD;
break;
}
diff --git a/net/irda/af_irda.c b/net/irda/af_irda.c
index e57683d..fbfa967 100644
--- a/net/irda/af_irda.c
+++ b/net/irda/af_irda.c
@@ -1822,7 +1822,7 @@
return -EINVAL;
default:
IRDA_DEBUG(1, "%s(), doing device ioctl!\n", __FUNCTION__);
- return dev_ioctl(cmd, (void __user *) arg);
+ return -ENOIOCTLCMD;
}
/*NOTREACHED*/
diff --git a/net/llc/af_llc.c b/net/llc/af_llc.c
index 9cf65f9..8171c53 100644
--- a/net/llc/af_llc.c
+++ b/net/llc/af_llc.c
@@ -959,7 +959,7 @@
static int llc_ui_ioctl(struct socket *sock, unsigned int cmd,
unsigned long arg)
{
- return dev_ioctl(cmd, (void __user *)arg);
+ return -ENOIOCTLCMD;
}
/**
diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index 9ee672e..63b0e4a 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -1215,7 +1215,7 @@
return nr_rt_ioctl(cmd, argp);
default:
- return dev_ioctl(cmd, argp);
+ return -ENOIOCTLCMD;
}
return 0;
diff --git a/net/packet/af_packet.c b/net/packet/af_packet.c
index deda6fd..f69e5ed 100644
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1521,7 +1521,7 @@
#endif
default:
- return dev_ioctl(cmd, (void __user *)arg);
+ return -ENOIOCTLCMD;
}
return 0;
}
diff --git a/net/rose/af_rose.c b/net/rose/af_rose.c
index 829fdbc..63090be 100644
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -1320,7 +1320,7 @@
return 0;
default:
- return dev_ioctl(cmd, argp);
+ return -ENOIOCTLCMD;
}
return 0;
diff --git a/net/socket.c b/net/socket.c
index 0dde6da..06fa217 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -900,6 +900,13 @@
break;
default:
err = sock->ops->ioctl(sock, cmd, arg);
+
+ /*
+ * If this ioctl is unknown try to hand it down
+ * to the NIC driver.
+ */
+ if (err == -ENOIOCTLCMD)
+ err = dev_ioctl(cmd, argp);
break;
}
return err;
diff --git a/net/unix/af_unix.c b/net/unix/af_unix.c
index 1ddd36d..5f6ae79 100644
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -1859,7 +1859,7 @@
}
default:
- err = dev_ioctl(cmd, (void __user *)arg);
+ err = -ENOIOCTLCMD;
break;
}
return err;
diff --git a/net/wanrouter/af_wanpipe.c b/net/wanrouter/af_wanpipe.c
index 67948bf..7a43ae4 100644
--- a/net/wanrouter/af_wanpipe.c
+++ b/net/wanrouter/af_wanpipe.c
@@ -1839,7 +1839,7 @@
#endif
default:
- return dev_ioctl(cmd,(void __user *) arg);
+ return -ENOIOCTLCMD;
}
/*NOTREACHED*/
}
diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index ca8b3b0..16459c7 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -1378,7 +1378,7 @@
}
default:
- rc = dev_ioctl(cmd, argp);
+ rc = -ENOIOCTLCMD;
break;
}