[CPUFREQ] Add support to cpufreq_ondemand to ignore 'nice' cpu time
[linux-2.6.22.y-op.git] / net / atm / ioctl.c
blob4dbb5af34a5ed6bb67fae64501d96cbe04147593
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)
32 down(&ioctl_mutex);
33 list_add_tail(&ioctl->list, &ioctl_list);
34 up(&ioctl_mutex);
37 void deregister_atm_ioctl(struct atm_ioctl *ioctl)
39 down(&ioctl_mutex);
40 list_del(&ioctl->list);
41 up(&ioctl_mutex);
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)
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;
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;
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:
69 struct sk_buff *skb;
71 if (sock->state != SS_CONNECTED) {
72 error = -EINVAL;
73 goto done;
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;
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84 printk(KERN_WARNING "ATM_SETSC is obsolete\n");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;
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
99 if (!capable(CAP_SYS_RAWIO)) {
100 error = -EPERM;
101 goto done;
103 error = sigd_attach(vcc);
104 if (!error)
105 sock->state = SS_CONNECTED;
106 goto done;
107 default:
108 break;
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");
118 error = -ENOIOCTLCMD;
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;
130 up(&ioctl_mutex);
132 if (error != -ENOIOCTLCMD)
133 goto done;
135 error = atm_dev_ioctl(cmd, argp);
137 done:
138 return error;