[mirror_ubuntu-artful-kernel.git] / net / atm / ioctl.c

/* ATM ioctl handling */

/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
/* 2003 John Levon  <levon@movementarian.org> */


#include <linux/config.h>
#include <linux/module.h>
#include <linux/kmod.h>
#include <linux/net.h>		/* struct socket, struct proto_ops */
#include <linux/atm.h>		/* ATM stuff */
#include <linux/atmdev.h>
#include <linux/atmclip.h>	/* CLIP_*ENCAP */
#include <linux/atmarp.h>	/* manifest constants */
#include <linux/sonet.h>	/* for ioctls */
#include <linux/atmsvc.h>
#include <linux/atmmpc.h>
#include <net/atmclip.h>
#include <linux/atmlec.h>
#include <asm/ioctls.h>

#include "resources.h"
#include "signaling.h"		/* for WAITING and sigd_attach */


static DECLARE_MUTEX(ioctl_mutex);
static LIST_HEAD(ioctl_list);


void register_atm_ioctl(struct atm_ioctl *ioctl)
{
	down(&ioctl_mutex);
	list_add_tail(&ioctl->list, &ioctl_list);
	up(&ioctl_mutex);
}

void deregister_atm_ioctl(struct atm_ioctl *ioctl)
{
	down(&ioctl_mutex);
	list_del(&ioctl->list);
	up(&ioctl_mutex);
}

EXPORT_SYMBOL(register_atm_ioctl);
EXPORT_SYMBOL(deregister_atm_ioctl);

int vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
{
	struct sock *sk = sock->sk;
	struct atm_vcc *vcc;
	int error;
	struct list_head * pos;
	void __user *argp = (void __user *)arg;

	vcc = ATM_SD(sock);
	switch (cmd) {
		case SIOCOUTQ:
			if (sock->state != SS_CONNECTED ||
			    !test_bit(ATM_VF_READY, &vcc->flags)) {
				error =  -EINVAL;
				goto done;
			}
			error = put_user(sk->sk_sndbuf -
					 atomic_read(&sk->sk_wmem_alloc),
					 (int __user *) argp) ? -EFAULT : 0;
			goto done;
		case SIOCINQ:
			{
				struct sk_buff *skb;

				if (sock->state != SS_CONNECTED) {
					error = -EINVAL;
					goto done;
				}
				skb = skb_peek(&sk->sk_receive_queue);
				error = put_user(skb ? skb->len : 0,
					 	 (int __user *)argp) ? -EFAULT : 0;
				goto done;
			}
		case SIOCGSTAMP: /* borrowed from IP */
			error = sock_get_timestamp(sk, argp);
			goto done;
		case ATM_SETSC:
			printk(KERN_WARNING "ATM_SETSC is obsolete\n");
			error = 0;
			goto done;
		case ATMSIGD_CTRL:
			if (!capable(CAP_NET_ADMIN)) {
				error = -EPERM;
				goto done;
			}
			/*
			 * The user/kernel protocol for exchanging signalling
			 * info uses kernel pointers as opaque references,
			 * so the holder of the file descriptor can scribble
			 * on the kernel... so we should make sure that we
			 * have the same privledges that /proc/kcore needs
			 */
			if (!capable(CAP_SYS_RAWIO)) {
				error = -EPERM;
				goto done;
			}
			error = sigd_attach(vcc);
			if (!error)
				sock->state = SS_CONNECTED;
			goto done;
		default:
			break;
	}

	if (cmd == ATMMPC_CTRL || cmd == ATMMPC_DATA)
		request_module("mpoa");
	if (cmd == ATMARPD_CTRL)
		request_module("clip");
	if (cmd == ATMLEC_CTRL)
		request_module("lec");

	error = -ENOIOCTLCMD;

	down(&ioctl_mutex);
	list_for_each(pos, &ioctl_list) {
		struct atm_ioctl * ic = list_entry(pos, struct atm_ioctl, list);
		if (try_module_get(ic->owner)) {
			error = ic->ioctl(sock, cmd, arg);
			module_put(ic->owner);
			if (error != -ENOIOCTLCMD)
				break;
		}
	}
	up(&ioctl_mutex);

	if (error != -ENOIOCTLCMD)
		goto done;

	error = atm_dev_ioctl(cmd, argp);

done:
	return error;
}
Commit	Line	Data
1da177e4 LT	1	/* ATM ioctl handling */
	2
	3	/* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
	4	/* 2003 John Levon <levon@movementarian.org> */
	5
	6
	7	#include <linux/config.h>
	8	#include <linux/module.h>
	9	#include <linux/kmod.h>
	10	#include <linux/net.h> /* struct socket, struct proto_ops */
	11	#include <linux/atm.h> /* ATM stuff */
	12	#include <linux/atmdev.h>
	13	#include <linux/atmclip.h> /* CLIP_ENCAP /
	14	#include <linux/atmarp.h> /* manifest constants */
	15	#include <linux/sonet.h> /* for ioctls */
	16	#include <linux/atmsvc.h>
	17	#include <linux/atmmpc.h>
	18	#include <net/atmclip.h>
	19	#include <linux/atmlec.h>
	20	#include <asm/ioctls.h>
	21
	22	#include "resources.h"
	23	#include "signaling.h" /* for WAITING and sigd_attach */
	24
	25
	26	static DECLARE_MUTEX(ioctl_mutex);
	27	static LIST_HEAD(ioctl_list);
	28
	29
	30	void register_atm_ioctl(struct atm_ioctl *ioctl)
	31	{
	32	down(&ioctl_mutex);
	33	list_add_tail(&ioctl->list, &ioctl_list);
	34	up(&ioctl_mutex);
	35	}
	36
	37	void deregister_atm_ioctl(struct atm_ioctl *ioctl)
	38	{
	39	down(&ioctl_mutex);
	40	list_del(&ioctl->list);
	41	up(&ioctl_mutex);
	42	}
	43
	44	EXPORT_SYMBOL(register_atm_ioctl);
	45	EXPORT_SYMBOL(deregister_atm_ioctl);
	46
	47	int vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
	48	{
	49	struct sock *sk = sock->sk;
	50	struct atm_vcc *vcc;
	51	int error;
	52	struct list_head * pos;
	53	void __user argp = (void __user )arg;
	54
	55	vcc = ATM_SD(sock);
	56	switch (cmd) {
	57	case SIOCOUTQ:
	58	if (sock->state != SS_CONNECTED \|\|
	59	!test_bit(ATM_VF_READY, &vcc->flags)) {
	60	error = -EINVAL;
	61	goto done;
	62	}
	63	error = put_user(sk->sk_sndbuf -
	64	atomic_read(&sk->sk_wmem_alloc),
65	(int __user *) argp) ? -EFAULT : 0;
66	goto done;
67	case SIOCINQ:
68	{
69	struct sk_buff *skb;
70
71	if (sock->state != SS_CONNECTED) {
72	error = -EINVAL;
73	goto done;
74	}
75	skb = skb_peek(&sk->sk_receive_queue);
76	error = put_user(skb ? skb->len : 0,
77	(int __user *)argp) ? -EFAULT : 0;
78	goto done;
79	}
80	case SIOCGSTAMP: /* borrowed from IP */
81	error = sock_get_timestamp(sk, argp);
82	goto done;
83	case ATM_SETSC:
84	printk(KERN_WARNING "ATM_SETSC is obsolete\n");
85	error = 0;
86	goto done;
87	case ATMSIGD_CTRL:
88	if (!capable(CAP_NET_ADMIN)) {
89	error = -EPERM;
90	goto done;
91	}
92	/*
93	* The user/kernel protocol for exchanging signalling
94	* info uses kernel pointers as opaque references,
95	* so the holder of the file descriptor can scribble
96	* on the kernel... so we should make sure that we
97	* have the same privledges that /proc/kcore needs
98	*/
99	if (!capable(CAP_SYS_RAWIO)) {
100	error = -EPERM;
101	goto done;
102	}
103	error = sigd_attach(vcc);
104	if (!error)
105	sock->state = SS_CONNECTED;
106	goto done;
107	default:
108	break;
109	}
110
111	if (cmd == ATMMPC_CTRL \|\| cmd == ATMMPC_DATA)
112	request_module("mpoa");
113	if (cmd == ATMARPD_CTRL)
114	request_module("clip");
115	if (cmd == ATMLEC_CTRL)
116	request_module("lec");
117
118	error = -ENOIOCTLCMD;
119
120	down(&ioctl_mutex);
121	list_for_each(pos, &ioctl_list) {
122	struct atm_ioctl * ic = list_entry(pos, struct atm_ioctl, list);
123	if (try_module_get(ic->owner)) {
124	error = ic->ioctl(sock, cmd, arg);
125	module_put(ic->owner);
126	if (error != -ENOIOCTLCMD)
127	break;
128	}
129	}
130	up(&ioctl_mutex);
131
132	if (error != -ENOIOCTLCMD)
133	goto done;
134
135	error = atm_dev_ioctl(cmd, argp);
136
137	done:
138	return error;
139	}