1 /* ATM ioctl handling */
3 /* Written 1995-2000 by Werner Almesberger, EPFL LRC/ICA */
4 /* 2003 John Levon <levon@movementarian.org> */
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>
22 #include "resources.h"
23 #include "signaling.h" /* for WAITING and sigd_attach */
26 static DECLARE_MUTEX(ioctl_mutex
);
27 static LIST_HEAD(ioctl_list
);
30 void register_atm_ioctl(struct atm_ioctl
*ioctl
)
33 list_add_tail(&ioctl
->list
, &ioctl_list
);
37 void deregister_atm_ioctl(struct atm_ioctl
*ioctl
)
40 list_del(&ioctl
->list
);
44 EXPORT_SYMBOL(register_atm_ioctl
);
45 EXPORT_SYMBOL(deregister_atm_ioctl
);
47 int vcc_ioctl(struct socket
*sock
, unsigned int cmd
, unsigned long arg
)
51 struct list_head
* pos
;
52 void __user
*argp
= (void __user
*)arg
;
57 if (sock
->state
!= SS_CONNECTED
||
58 !test_bit(ATM_VF_READY
, &vcc
->flags
)) {
62 error
= put_user(vcc
->sk
->sk_sndbuf
-
63 atomic_read(&vcc
->sk
->sk_wmem_alloc
),
64 (int __user
*) argp
) ? -EFAULT
: 0;
70 if (sock
->state
!= SS_CONNECTED
) {
74 skb
= skb_peek(&vcc
->sk
->sk_receive_queue
);
75 error
= put_user(skb
? skb
->len
: 0,
76 (int __user
*)argp
) ? -EFAULT
: 0;
79 case SIOCGSTAMP
: /* borrowed from IP */
80 error
= sock_get_timestamp(vcc
->sk
, argp
);
83 printk(KERN_WARNING
"ATM_SETSC is obsolete\n");
87 if (!capable(CAP_NET_ADMIN
)) {
92 * The user/kernel protocol for exchanging signalling
93 * info uses kernel pointers as opaque references,
94 * so the holder of the file descriptor can scribble
95 * on the kernel... so we should make sure that we
96 * have the same privledges that /proc/kcore needs
98 if (!capable(CAP_SYS_RAWIO
)) {
102 error
= sigd_attach(vcc
);
104 sock
->state
= SS_CONNECTED
;
110 if (cmd
== ATMMPC_CTRL
|| cmd
== ATMMPC_DATA
)
111 request_module("mpoa");
112 if (cmd
== ATMARPD_CTRL
)
113 request_module("clip");
114 if (cmd
== ATMLEC_CTRL
)
115 request_module("lec");
117 error
= -ENOIOCTLCMD
;
120 list_for_each(pos
, &ioctl_list
) {
121 struct atm_ioctl
* ic
= list_entry(pos
, struct atm_ioctl
, list
);
122 if (try_module_get(ic
->owner
)) {
123 error
= ic
->ioctl(sock
, cmd
, arg
);
124 module_put(ic
->owner
);
125 if (error
!= -ENOIOCTLCMD
)
131 if (error
!= -ENOIOCTLCMD
)
134 error
= atm_dev_ioctl(cmd
, argp
);