net/compat: Merge multiple implementations of ifreq::ifr_data conversion

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>

1 files changed, 6 insertions, 43 deletions

diff --git a/net/socket.c b/net/socket.c
index fbb6ec13b1f4..7a766ab83ca5 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2964,11 +2964,8 @@ static int bond_ioctl(struct net *net, unsigned int cmd,
                          struct compat_ifreq __user *ifr32)
 {
         struct ifreq kifr;
-        struct ifreq __user *uifr;
         mm_segment_t old_fs;
         int err;
-        u32 data;
-        void __user *datap;
 
         switch (cmd) {
         case SIOCBONDENSLAVE:
@@ -2985,26 +2982,13 @@ static int bond_ioctl(struct net *net, unsigned int cmd,
                 set_fs(old_fs);
 
                 return err;
-        case SIOCBONDSLAVEINFOQUERY:
-        case SIOCBONDINFOQUERY:
-                uifr = compat_alloc_user_space(sizeof(*uifr));
-                if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ))
-                        return -EFAULT;
-
-                if (get_user(data, &ifr32->ifr_ifru.ifru_data))
-                        return -EFAULT;
-
-                datap = compat_ptr(data);
-                if (put_user(datap, &uifr->ifr_ifru.ifru_data))
-                        return -EFAULT;
-
-                return dev_ioctl(net, cmd, uifr);
         default:
                 return -ENOIOCTLCMD;
         }
 }
 
-static int siocdevprivate_ioctl(struct net *net, unsigned int cmd,
+/* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */
+static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd,
                                  struct compat_ifreq __user *u_ifreq32)
 {
         struct ifreq __user *u_ifreq64;
@@ -3104,27 +3088,6 @@ static int compat_sioc_ifmap(struct net *net, unsigned int cmd,
         return err;
 }
 
-static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32)
-{
-        void __user *uptr;
-        compat_uptr_t uptr32;
-        struct ifreq __user *uifr;
-
-        uifr = compat_alloc_user_space(sizeof(*uifr));
-        if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
-                return -EFAULT;
-
-        if (get_user(uptr32, &uifr32->ifr_data))
-                return -EFAULT;
-
-        uptr = compat_ptr(uptr32);
-
-        if (put_user(uptr, &uifr->ifr_data))
-                return -EFAULT;
-
-        return dev_ioctl(net, SIOCSHWTSTAMP, uifr);
-}
-
 struct rtentry32 {
         u32             rt_pad1;
         struct sockaddr rt_dst;         /* target address               */
@@ -3236,7 +3199,7 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
         struct net *net = sock_net(sk);
 
         if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15))
-                return siocdevprivate_ioctl(net, cmd, argp);
+                return compat_ifr_data_ioctl(net, cmd, argp);
 
         switch (cmd) {
         case SIOCSIFBR:
@@ -3256,8 +3219,6 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
         case SIOCBONDENSLAVE:
         case SIOCBONDRELEASE:
         case SIOCBONDSETHWADDR:
-        case SIOCBONDSLAVEINFOQUERY:
-        case SIOCBONDINFOQUERY:
         case SIOCBONDCHANGEACTIVE:
                 return bond_ioctl(net, cmd, argp);
         case SIOCADDRT:
@@ -3267,8 +3228,10 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
                 return do_siocgstamp(net, sock, cmd, argp);
         case SIOCGSTAMPNS:
                 return do_siocgstampns(net, sock, cmd, argp);
+        case SIOCBONDSLAVEINFOQUERY:
+        case SIOCBONDINFOQUERY:
         case SIOCSHWTSTAMP:
-                return compat_siocshwtstamp(net, argp);
+                return compat_ifr_data_ioctl(net, cmd, argp);
 
         case FIOSETOWN:
         case SIOCSPGRP: