X25: pushdown bkl in ioctls

Push down the bkl in the ioctls so they can be removed one at a time.

Signed-off-by: Andrew Hendry <andrew.hendry@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 38 insertions, 3 deletions

diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index f7af98dff409..c99029bc411c 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -1357,14 +1357,16 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
         void __user *argp = (void __user *)arg;
         int rc;
 
-        lock_kernel();
         switch (cmd) {
                 case TIOCOUTQ: {
-                        int amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
+                        int amount;
 
+                        lock_kernel();
+                        amount = sk->sk_sndbuf - sk_wmem_alloc_get(sk);
                         if (amount < 0)
                                 amount = 0;
                         rc = put_user(amount, (unsigned int __user *)argp);
+                        unlock_kernel();
                         break;
                 }
 
@@ -1375,23 +1377,29 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                          * These two are safe on a single CPU system as
                          * only user tasks fiddle here
                          */
+                        lock_kernel();
                         if ((skb = skb_peek(&sk->sk_receive_queue)) != NULL)
                                 amount = skb->len;
                         rc = put_user(amount, (unsigned int __user *)argp);
+                        unlock_kernel();
                         break;
                 }
 
                 case SIOCGSTAMP:
                         rc = -EINVAL;
+                        lock_kernel();
                         if (sk)
                                 rc = sock_get_timestamp(sk,
                                                 (struct timeval __user *)argp);
+                        unlock_kernel();
                         break;
                 case SIOCGSTAMPNS:
                         rc = -EINVAL;
+                        lock_kernel();
                         if (sk)
                                 rc = sock_get_timestampns(sk,
                                                 (struct timespec __user *)argp);
+                        unlock_kernel();
                         break;
                 case SIOCGIFADDR:
                 case SIOCSIFADDR:
@@ -1410,27 +1418,36 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                         rc = -EPERM;
                         if (!capable(CAP_NET_ADMIN))
                                 break;
+                        lock_kernel();
                         rc = x25_route_ioctl(cmd, argp);
+                        unlock_kernel();
                         break;
                 case SIOCX25GSUBSCRIP:
+                        lock_kernel();
                         rc = x25_subscr_ioctl(cmd, argp);
+                        unlock_kernel();
                         break;
                 case SIOCX25SSUBSCRIP:
                         rc = -EPERM;
                         if (!capable(CAP_NET_ADMIN))
                                 break;
+                        lock_kernel();
                         rc = x25_subscr_ioctl(cmd, argp);
+                        unlock_kernel();
                         break;
                 case SIOCX25GFACILITIES: {
                         struct x25_facilities fac = x25->facilities;
+                        lock_kernel();
                         rc = copy_to_user(argp, &fac,
                                           sizeof(fac)) ? -EFAULT : 0;
+                        unlock_kernel();
                         break;
                 }
 
                 case SIOCX25SFACILITIES: {
                         struct x25_facilities facilities;
                         rc = -EFAULT;
+                        lock_kernel();
                         if (copy_from_user(&facilities, argp,
                                            sizeof(facilities)))
                                 break;
@@ -1466,12 +1483,15 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                                 break;
                         x25->facilities = facilities;
                         rc = 0;
+                        unlock_kernel();
                         break;
                 }
 
                 case SIOCX25GDTEFACILITIES: {
+                        lock_kernel();
                         rc = copy_to_user(argp, &x25->dte_facilities,
                                                 sizeof(x25->dte_facilities));
+                        unlock_kernel();
                         if (rc)
                                 rc = -EFAULT;
                         break;
@@ -1480,6 +1500,7 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                 case SIOCX25SDTEFACILITIES: {
                         struct x25_dte_facilities dtefacs;
                         rc = -EFAULT;
+                        lock_kernel();
                         if (copy_from_user(&dtefacs, argp, sizeof(dtefacs)))
                                 break;
                         rc = -EINVAL;
@@ -1496,13 +1517,16 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                                 break;
                         x25->dte_facilities = dtefacs;
                         rc = 0;
+                        unlock_kernel();
                         break;
                 }
 
                 case SIOCX25GCALLUSERDATA: {
                         struct x25_calluserdata cud = x25->calluserdata;
+                        lock_kernel();
                         rc = copy_to_user(argp, &cud,
                                           sizeof(cud)) ? -EFAULT : 0;
+                        unlock_kernel();
                         break;
                 }
 
@@ -1510,6 +1534,7 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                         struct x25_calluserdata calluserdata;
 
                         rc = -EFAULT;
+                        lock_kernel();
                         if (copy_from_user(&calluserdata, argp,
                                            sizeof(calluserdata)))
                                 break;
@@ -1517,24 +1542,29 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                         if (calluserdata.cudlength > X25_MAX_CUD_LEN)
                                 break;
                         x25->calluserdata = calluserdata;
+                        unlock_kernel();
                         rc = 0;
                         break;
                 }
 
                 case SIOCX25GCAUSEDIAG: {
                         struct x25_causediag causediag;
+                        lock_kernel();
                         causediag = x25->causediag;
                         rc = copy_to_user(argp, &causediag,
                                           sizeof(causediag)) ? -EFAULT : 0;
+                        unlock_kernel();
                         break;
                 }
 
                 case SIOCX25SCAUSEDIAG: {
                         struct x25_causediag causediag;
                         rc = -EFAULT;
+                        lock_kernel();
                         if (copy_from_user(&causediag, argp, sizeof(causediag)))
                                 break;
                         x25->causediag = causediag;
+                        unlock_kernel();
                         rc = 0;
                         break;
 
@@ -1543,6 +1573,7 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                 case SIOCX25SCUDMATCHLEN: {
                         struct x25_subaddr sub_addr;
                         rc = -EINVAL;
+                        lock_kernel();
                         if(sk->sk_state != TCP_CLOSE)
                                 break;
                         rc = -EFAULT;
@@ -1553,21 +1584,25 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                         if(sub_addr.cudmatchlength > X25_MAX_CUD_LEN)
                                 break;
                         x25->cudmatchlength = sub_addr.cudmatchlength;
+                        unlock_kernel();
                         rc = 0;
                         break;
                 }
 
                 case SIOCX25CALLACCPTAPPRV: {
                         rc = -EINVAL;
+                        lock_kernel();
                         if (sk->sk_state != TCP_CLOSE)
                                 break;
                         clear_bit(X25_ACCPT_APPRV_FLAG, &x25->flags);
+                        unlock_kernel();
                         rc = 0;
                         break;
                 }
 
                 case SIOCX25SENDCALLACCPT:  {
                         rc = -EINVAL;
+                        lock_kernel();
                         if (sk->sk_state != TCP_ESTABLISHED)
                                 break;
                         /* must call accptapprv above */
@@ -1575,6 +1610,7 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                                 break;
                         x25_write_internal(sk, X25_CALL_ACCEPTED);
                         x25->state = X25_STATE_3;
+                        unlock_kernel();
                         rc = 0;
                         break;
                 }
@@ -1583,7 +1619,6 @@ static int x25_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
                         rc = -ENOIOCTLCMD;
                         break;
         }
-        unlock_kernel();
 
         return rc;
 }