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83 printk(KERN_WARNING "ATM_SETSC is obsolete\n");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);