[NET]: ethtool ops are the only way

During the transition to the ethtool_ops way of doing things, we supported
calling the device's ->do_ioctl method to allow unconverted drivers to
continue working.  Those days are long behind us, all in-tree drivers
use the ethtool_ops way, and so we no longer need to support this.

The bonding driver is the biggest beneficiary of this; it no longer
needs to call ioctl() as a fallback if ethtool_ops aren't supported.

Also put a proper copyright statement on ethtool.c.

Signed-off-by: Matthew Wilcox <matthew@wil.cx>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 32 insertions, 85 deletions

diff --git a/drivers/net/bonding/bond_main.c b/drivers/net/bonding/bond_main.c
index cb9cb3013f42..070b78d959cc 100644
--- a/drivers/net/bonding/bond_main.c
+++ b/drivers/net/bonding/bond_main.c
@@ -613,38 +613,20 @@ down:
 static int bond_update_speed_duplex(struct slave *slave)
 {
         struct net_device *slave_dev = slave->dev;
-        static int (* ioctl)(struct net_device *, struct ifreq *, int);
-        struct ifreq ifr;
         struct ethtool_cmd etool;
+        int res;
 
         /* Fake speed and duplex */
         slave->speed = SPEED_100;
         slave->duplex = DUPLEX_FULL;
 
-        if (slave_dev->ethtool_ops) {
-                int res;
-
-                if (!slave_dev->ethtool_ops->get_settings) {
-                        return -1;
-                }
-
-                res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool);
-                if (res < 0) {
-                        return -1;
-                }
-
-                goto verify;
-        }
+        if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings)
+                return -1;
 
-        ioctl = slave_dev->do_ioctl;
-        strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
-        etool.cmd = ETHTOOL_GSET;
-        ifr.ifr_data = (char*)&etool;
-        if (!ioctl || (IOCTL(slave_dev, &ifr, SIOCETHTOOL) < 0)) {
+        res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool);
+        if (res < 0)
                 return -1;
-        }
 
-verify:
         switch (etool.speed) {
         case SPEED_10:
         case SPEED_100:
@@ -690,7 +672,6 @@ static int bond_check_dev_link(struct bonding *bond, struct net_device *slave_de
         static int (* ioctl)(struct net_device *, struct ifreq *, int);
         struct ifreq ifr;
         struct mii_ioctl_data *mii;
-        struct ethtool_value etool;
 
         if (bond->params.use_carrier) {
                 return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0;
@@ -721,9 +702,10 @@ static int bond_check_dev_link(struct bonding *bond, struct net_device *slave_de
                 }
         }
 
-        /* try SIOCETHTOOL ioctl, some drivers cache ETHTOOL_GLINK */
-        /* for a period of time so we attempt to get link status   */
-        /* from it last if the above MII ioctls fail...            */
+        /*
+         * Some drivers cache ETHTOOL_GLINK for a period of time so we only
+         * attempt to get link status from it if the above MII ioctls fail.
+         */
         if (slave_dev->ethtool_ops) {
                 if (slave_dev->ethtool_ops->get_link) {
                         u32 link;
@@ -734,23 +716,9 @@ static int bond_check_dev_link(struct bonding *bond, struct net_device *slave_de
                 }
         }
 
-        if (ioctl) {
-                strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ);
-                etool.cmd = ETHTOOL_GLINK;
-                ifr.ifr_data = (char*)&etool;
-                if (IOCTL(slave_dev, &ifr, SIOCETHTOOL) == 0) {
-                        if (etool.data == 1) {
-                                return BMSR_LSTATUS;
-                        } else {
-                                dprintk("SIOCETHTOOL shows link down\n");
-                                return 0;
-                        }
-                }
-        }
-
         /*
          * If reporting, report that either there's no dev->do_ioctl,
-         * or both SIOCGMIIREG and SIOCETHTOOL failed (meaning that we
+         * or both SIOCGMIIREG and get_link failed (meaning that we
          * cannot report link status).  If not reporting, pretend
          * we're ok.
          */
diff --git a/net/8021q/vlan_dev.c b/net/8021q/vlan_dev.c
index 4d2aa4dd42ac..4bab322c9f8f 100644
--- a/net/8021q/vlan_dev.c
+++ b/net/8021q/vlan_dev.c
@@ -668,9 +668,6 @@ int vlan_dev_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
                 if (real_dev->do_ioctl && netif_device_present(real_dev))
                         err = real_dev->do_ioctl(real_dev, &ifrr, cmd);
                 break;
-
-        case SIOCETHTOOL:
-                err = dev_ethtool(&ifrr);
         }
 
         if (!err)
diff --git a/net/bridge/br_if.c b/net/bridge/br_if.c
index 7b4ce9113be2..b40dada002bf 100644
--- a/net/bridge/br_if.c
+++ b/net/bridge/br_if.c
@@ -29,35 +29,24 @@
  * Determine initial path cost based on speed.
  * using recommendations from 802.1d standard
  *
- * Need to simulate user ioctl because not all device's that support
- * ethtool, use ethtool_ops.  Also, since driver might sleep need to
- * not be holding any locks.
+ * Since driver might sleep need to not be holding any locks.
  */
 static int port_cost(struct net_device *dev)
 {
-        struct ethtool_cmd ecmd = { ETHTOOL_GSET };
-        struct ifreq ifr;
-        mm_segment_t old_fs;
-        int err;
-
-        strncpy(ifr.ifr_name, dev->name, IFNAMSIZ);
-        ifr.ifr_data = (void __user *) &ecmd;
-
-        old_fs = get_fs();
-        set_fs(KERNEL_DS);
-        err = dev_ethtool(&ifr);
-        set_fs(old_fs);
-
-        if (!err) {
-                switch(ecmd.speed) {
-                case SPEED_100:
-                        return 19;
-                case SPEED_1000:
-                        return 4;
-                case SPEED_10000:
-                        return 2;
-                case SPEED_10:
-                        return 100;
+        if (dev->ethtool_ops->get_settings) {
+                struct ethtool_cmd ecmd = { ETHTOOL_GSET };
+                int err = dev->ethtool_ops->get_settings(dev, &ecmd);
+                if (!err) {
+                        switch(ecmd.speed) {
+                        case SPEED_100:
+                                return 19;
+                        case SPEED_1000:
+                                return 4;
+                        case SPEED_10000:
+                                return 2;
+                        case SPEED_10:
+                                return 100;
+                        }
                 }
         }
 
diff --git a/net/core/ethtool.c b/net/core/ethtool.c
index 0b531e98ec33..2bf565e8d0b3 100644
--- a/net/core/ethtool.c
+++ b/net/core/ethtool.c
@@ -3,10 +3,12 @@
  * Copyright (c) 2003 Matthew Wilcox <matthew@wil.cx>
  *
  * This file is where we call all the ethtool_ops commands to get
- * the information ethtool needs.  We fall back to calling do_ioctl()
- * for drivers which haven't been converted to ethtool_ops yet.
+ * the information ethtool needs.
  *
- * It's GPL, stupid.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
  */
 
 #include <linux/module.h>
@@ -821,7 +823,7 @@ int dev_ethtool(struct ifreq *ifr)
                 return -ENODEV;
 
         if (!dev->ethtool_ops)
-                goto ioctl;
+                return -EOPNOTSUPP;
 
         if (copy_from_user(&ethcmd, useraddr, sizeof (ethcmd)))
                 return -EFAULT;
@@ -960,7 +962,7 @@ int dev_ethtool(struct ifreq *ifr)
                 rc = ethtool_set_gso(dev, useraddr);
                 break;
         default:
-                rc =  -EOPNOTSUPP;
+                rc = -EOPNOTSUPP;
         }
 
         if (dev->ethtool_ops->complete)
@@ -970,15 +972,6 @@ int dev_ethtool(struct ifreq *ifr)
                 netdev_features_change(dev);
 
         return rc;
-
- ioctl:
-        /* Keep existing behaviour for the moment.       */
-        if (!capable(CAP_NET_ADMIN))
-                return -EPERM;
-
-        if (dev->do_ioctl)
-                return dev->do_ioctl(dev, ifr, SIOCETHTOOL);
-        return -EOPNOTSUPP;
 }
 
 EXPORT_SYMBOL(dev_ethtool);