1 files changed, 139 insertions, 0 deletions

diff --git a/net/atm/ioctl.c b/net/atm/ioctl.c
new file mode 100644
index 000000000000..4dbb5af34a5e
--- /dev/null
+++ b/net/atm/ioctl.c
@@ -0,0 +1,139 @@
+/* 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;
+}