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Commit 70be998c authored by andrew hendry's avatar andrew hendry Committed by David S. Miller
Browse files

X25: pushdown bkl in ioctls 



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

Signed-off-by: default avatarAndrew Hendry <andrew.hendry@gmail.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent c26aed40

net/x25/af_x25.c

+38 −3
Original line number Diff line number Diff line
@@ -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;

}