1 /* ATM ioctl handling */
3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
4 /* 2003 John Levon <levon@movementarian.org> */
7 #include <linux/module.h>
8 #include <linux/kmod.h>
9 #include <linux/net.h> /* struct socket, struct proto_ops */
10 #include <linux/atm.h> /* ATM stuff */
11 #include <linux/atmdev.h>
12 #include <linux/atmclip.h> /* CLIP_*ENCAP */
13 #include <linux/atmarp.h> /* manifest constants */
14 #include <linux/capability.h>
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 <linux/mutex.h>
21 #include <asm/ioctls.h>
22 #include <net/compat.h>
24 #include "resources.h"
25 #include "signaling.h" /* for WAITING and sigd_attach */
29 static DEFINE_MUTEX(ioctl_mutex
);
30 static LIST_HEAD(ioctl_list
);
33 void register_atm_ioctl(struct atm_ioctl
*ioctl
)
35 mutex_lock(&ioctl_mutex
);
36 list_add_tail(&ioctl
->list
, &ioctl_list
);
37 mutex_unlock(&ioctl_mutex
);
40 void deregister_atm_ioctl(struct atm_ioctl
*ioctl
)
42 mutex_lock(&ioctl_mutex
);
43 list_del(&ioctl
->list
);
44 mutex_unlock(&ioctl_mutex
);
47 EXPORT_SYMBOL(register_atm_ioctl
);
48 EXPORT_SYMBOL(deregister_atm_ioctl
);
50 static int do_vcc_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
, int compat
)
52 struct sock
*sk
= sock
->sk
;
55 struct list_head
* pos
;
56 void __user
*argp
= (void __user
*)arg
;
61 if (sock
->state
!= SS_CONNECTED
||
62 !test_bit(ATM_VF_READY
, &vcc
->flags
)) {
66 error
= put_user(sk
->sk_sndbuf
- sk_wmem_alloc_get(sk
),
67 (int __user
*) argp
) ? -EFAULT
: 0;
73 if (sock
->state
!= SS_CONNECTED
) {
77 skb
= skb_peek(&sk
->sk_receive_queue
);
78 error
= put_user(skb
? skb
->len
: 0,
79 (int __user
*)argp
) ? -EFAULT
: 0;
82 case SIOCGSTAMP
: /* borrowed from IP */
85 error
= compat_sock_get_timestamp(sk
, argp
);
88 error
= sock_get_timestamp(sk
, argp
);
90 case SIOCGSTAMPNS
: /* borrowed from IP */
93 error
= compat_sock_get_timestampns(sk
, argp
);
96 error
= sock_get_timestampns(sk
, argp
);
100 printk(KERN_WARNING
"ATM_SETSC is obsolete; used by %s:%d\n",
101 current
->comm
, task_pid_nr(current
));
105 if (!capable(CAP_NET_ADMIN
)) {
110 * The user/kernel protocol for exchanging signalling
111 * info uses kernel pointers as opaque references,
112 * so the holder of the file descriptor can scribble
113 * on the kernel... so we should make sure that we
114 * have the same privileges that /proc/kcore needs
116 if (!capable(CAP_SYS_RAWIO
)) {
121 /* WTF? I don't even want to _think_ about making this
122 work for 32-bit userspace. TBH I don't really want
123 to think about it at all. dwmw2. */
126 printk(KERN_WARNING
"32-bit task cannot be atmsigd\n");
131 error
= sigd_attach(vcc
);
133 sock
->state
= SS_CONNECTED
;
136 case ATM_NEWBACKENDIF
:
138 atm_backend_t backend
;
139 error
= get_user(backend
, (atm_backend_t __user
*) argp
);
143 case ATM_BACKEND_PPP
:
144 request_module("pppoatm");
146 case ATM_BACKEND_BR2684
:
147 request_module("br2684");
154 request_module("mpoa");
157 request_module("clip");
160 request_module("lec");
164 error
= -ENOIOCTLCMD
;
166 mutex_lock(&ioctl_mutex
);
167 list_for_each(pos
, &ioctl_list
) {
168 struct atm_ioctl
* ic
= list_entry(pos
, struct atm_ioctl
, list
);
169 if (try_module_get(ic
->owner
)) {
170 error
= ic
->ioctl(sock
, cmd
, arg
);
171 module_put(ic
->owner
);
172 if (error
!= -ENOIOCTLCMD
)
176 mutex_unlock(&ioctl_mutex
);
178 if (error
!= -ENOIOCTLCMD
)
181 error
= atm_dev_ioctl(cmd
, argp
, compat
);
188 int vcc_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
190 return do_vcc_ioctl(sock
, cmd
, arg
, 0);
194 int vcc_compat_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
196 return do_vcc_ioctl(sock
, cmd
, arg
, 1);
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