Merge branch 'siocghwtstamp' of git://git.kernel.org/pub/scm/linux/kernel/git/bwh/sfc-next

Ben Hutchings says:

====================
SIOCGHWTSTAMP ioctl

1. Add the SIOCGHWTSTAMP ioctl and update the timestamping
documentation.
2. Implement SIOCGHWTSTAMP in most drivers that support SIOCSHWTSTAMP.
3. Add a test program to exercise SIOC{G,S}HWTSTAMP.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 11 insertions, 48 deletions

diff --git a/net/core/dev_ioctl.c b/net/core/dev_ioctl.c
index 5b7d0e1..cf999e0 100644
--- a/net/core/dev_ioctl.c
+++ b/net/core/dev_ioctl.c
@@ -327,6 +327,7 @@ static int dev_ifsioc(struct net *net, struct ifreq *ifr, unsigned int cmd)
 		    cmd == SIOCBRADDIF ||
 		    cmd == SIOCBRDELIF ||
 		    cmd == SIOCSHWTSTAMP ||
+		    cmd == SIOCGHWTSTAMP ||
 		    cmd == SIOCWANDEV) {
 			err = -EOPNOTSUPP;
 			if (ops->ndo_do_ioctl) {
@@ -546,6 +547,7 @@ int dev_ioctl(struct net *net, unsigned int cmd, void __user *arg)
 	 */
 	default:
 		if (cmd == SIOCWANDEV ||
+		    cmd == SIOCGHWTSTAMP ||
 		    (cmd >= SIOCDEVPRIVATE &&
 		     cmd <= SIOCDEVPRIVATE + 15)) {
 			dev_load(net, ifr.ifr_name);
diff --git a/net/socket.c b/net/socket.c
index e83c416..cd38a78 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2968,11 +2968,8 @@ 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:
@@ -2989,26 +2986,13 @@ 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;
@@ -3019,19 +3003,16 @@ static int siocdevprivate_ioctl(struct net *net, unsigned int cmd,
 	if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]),
 			   IFNAMSIZ))
 		return -EFAULT;
-	if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data))
+	if (get_user(data32, &u_ifreq32->ifr_ifru.ifru_data))
 		return -EFAULT;
 	data64 = compat_ptr(data32);
 
 	u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64));
 
-	/* Don't check these user accesses, just let that get trapped
-	 * in the ioctl handler instead.
-	 */
 	if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0],
 			 IFNAMSIZ))
 		return -EFAULT;
-	if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data))
+	if (put_user(data64, &u_ifreq64->ifr_ifru.ifru_data))
 		return -EFAULT;
 
 	return dev_ioctl(net, cmd, u_ifreq64);
@@ -3111,27 +3092,6 @@ 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               */
@@ -3243,7 +3203,7 @@ 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:
@@ -3263,8 +3223,6 @@ 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:
@@ -3274,8 +3232,11 @@ 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);
+	case SIOCGHWTSTAMP:
+		return compat_ifr_data_ioctl(net, cmd, argp);
 
 	case FIOSETOWN:
 	case SIOCSPGRP: