[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 (file)
--- a/net/appletalk/ddp.c
+++ b/net/appletalk/ddp.c
@@ -1763,7 +1763,7 @@ static int atalk_recvmsg(struct kiocb *iocb, struct socket *sock, struct msghdr
  */
 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 @@ static int atalk_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                        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 (file)
--- a/net/ax25/af_ax25.c
+++ b/net/ax25/af_ax25.c
@@ -1827,7 +1827,7 @@ static int ax25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                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 (file)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -3276,7 +3276,6 @@ EXPORT_SYMBOL(dev_close);
 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 (file)
--- a/net/decnet/af_decnet.c
+++ b/net/decnet/af_decnet.c
@@ -1252,7 +1252,7 @@ static int dn_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                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 (file)
--- a/net/econet/af_econet.c
+++ b/net/econet/af_econet.c
@@ -687,7 +687,7 @@ static int econet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg
                        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 (file)
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -777,10 +777,10 @@ int inet_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                        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 (file)
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -434,7 +434,6 @@ int inet6_getname(struct socket *sock, struct sockaddr *uaddr,
 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 @@ int inet6_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
        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 (file)
--- a/net/ipx/af_ipx.c
+++ b/net/ipx/af_ipx.c
@@ -1884,7 +1884,7 @@ static int ipx_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                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 (file)
--- a/net/irda/af_irda.c
+++ b/net/irda/af_irda.c
@@ -1822,7 +1822,7 @@ static int irda_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                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 (file)
--- a/net/llc/af_llc.c
+++ b/net/llc/af_llc.c
@@ -959,7 +959,7 @@ out:
 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 (file)
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -1215,7 +1215,7 @@ static int nr_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                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 (file)
--- a/net/packet/af_packet.c
+++ b/net/packet/af_packet.c
@@ -1521,7 +1521,7 @@ static int packet_ioctl(struct socket *sock, unsigned int cmd,
 #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 (file)
--- a/net/rose/af_rose.c
+++ b/net/rose/af_rose.c
@@ -1320,7 +1320,7 @@ static int rose_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                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 (file)
--- a/net/socket.c
+++ b/net/socket.c
@@ -900,6 +900,13 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
                        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 (file)
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -1859,7 +1859,7 @@ static int unix_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                }
 
                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 (file)
--- a/net/wanrouter/af_wanpipe.c
+++ b/net/wanrouter/af_wanpipe.c
@@ -1839,7 +1839,7 @@ static int wanpipe_ioctl(struct socket *sock, unsigned int cmd, unsigned long ar
 #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 (file)
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -1378,7 +1378,7 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                }
 
                default:
-                       rc = dev_ioctl(cmd, argp);
+                       rc = -ENOIOCTLCMD;
                        break;
        }