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7#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
8
9#include <linux/module.h>
10#include <linux/kmod.h>
11#include <linux/net.h>
12#include <linux/atm.h>
13#include <linux/atmdev.h>
14#include <linux/atmclip.h>
15#include <linux/atmarp.h>
16#include <linux/capability.h>
17#include <linux/sonet.h>
18#include <linux/atmsvc.h>
19#include <linux/atmmpc.h>
20#include <net/atmclip.h>
21#include <linux/atmlec.h>
22#include <linux/mutex.h>
23#include <asm/ioctls.h>
24#include <net/compat.h>
25
26#include "resources.h"
27#include "signaling.h"
28#include "common.h"
29
30
31static DEFINE_MUTEX(ioctl_mutex);
32static LIST_HEAD(ioctl_list);
33
34
35void register_atm_ioctl(struct atm_ioctl *ioctl)
36{
37 mutex_lock(&ioctl_mutex);
38 list_add_tail(&ioctl->list, &ioctl_list);
39 mutex_unlock(&ioctl_mutex);
40}
41EXPORT_SYMBOL(register_atm_ioctl);
42
43void deregister_atm_ioctl(struct atm_ioctl *ioctl)
44{
45 mutex_lock(&ioctl_mutex);
46 list_del(&ioctl->list);
47 mutex_unlock(&ioctl_mutex);
48}
49EXPORT_SYMBOL(deregister_atm_ioctl);
50
51static int do_vcc_ioctl(struct socket *sock, unsigned int cmd,
52 unsigned long arg, int compat)
53{
54 struct sock *sk = sock->sk;
55 struct atm_vcc *vcc;
56 int error;
57 struct list_head *pos;
58 void __user *argp = (void __user *)arg;
59
60 vcc = ATM_SD(sock);
61 switch (cmd) {
62 case SIOCOUTQ:
63 if (sock->state != SS_CONNECTED ||
64 !test_bit(ATM_VF_READY, &vcc->flags)) {
65 error = -EINVAL;
66 goto done;
67 }
68 error = put_user(sk->sk_sndbuf - sk_wmem_alloc_get(sk),
69 (int __user *)argp) ? -EFAULT : 0;
70 goto done;
71 case SIOCINQ:
72 {
73 struct sk_buff *skb;
74
75 if (sock->state != SS_CONNECTED) {
76 error = -EINVAL;
77 goto done;
78 }
79 skb = skb_peek(&sk->sk_receive_queue);
80 error = put_user(skb ? skb->len : 0,
81 (int __user *)argp) ? -EFAULT : 0;
82 goto done;
83 }
84 case ATM_SETSC:
85 net_warn_ratelimited("ATM_SETSC is obsolete; used by %s:%d\n",
86 current->comm, task_pid_nr(current));
87 error = 0;
88 goto done;
89 case ATMSIGD_CTRL:
90 if (!capable(CAP_NET_ADMIN)) {
91 error = -EPERM;
92 goto done;
93 }
94
95
96
97
98
99
100
101 if (!capable(CAP_SYS_RAWIO)) {
102 error = -EPERM;
103 goto done;
104 }
105#ifdef CONFIG_COMPAT
106
107
108
109 if (compat) {
110 net_warn_ratelimited("32-bit task cannot be atmsigd\n");
111 error = -EINVAL;
112 goto done;
113 }
114#endif
115 error = sigd_attach(vcc);
116 if (!error)
117 sock->state = SS_CONNECTED;
118 goto done;
119 case ATM_SETBACKEND:
120 case ATM_NEWBACKENDIF:
121 {
122 atm_backend_t backend;
123 error = get_user(backend, (atm_backend_t __user *)argp);
124 if (error)
125 goto done;
126 switch (backend) {
127 case ATM_BACKEND_PPP:
128 request_module("pppoatm");
129 break;
130 case ATM_BACKEND_BR2684:
131 request_module("br2684");
132 break;
133 }
134 break;
135 }
136 case ATMMPC_CTRL:
137 case ATMMPC_DATA:
138 request_module("mpoa");
139 break;
140 case ATMARPD_CTRL:
141 request_module("clip");
142 break;
143 case ATMLEC_CTRL:
144 request_module("lec");
145 break;
146 }
147
148 error = -ENOIOCTLCMD;
149
150 mutex_lock(&ioctl_mutex);
151 list_for_each(pos, &ioctl_list) {
152 struct atm_ioctl *ic = list_entry(pos, struct atm_ioctl, list);
153 if (try_module_get(ic->owner)) {
154 error = ic->ioctl(sock, cmd, arg);
155 module_put(ic->owner);
156 if (error != -ENOIOCTLCMD)
157 break;
158 }
159 }
160 mutex_unlock(&ioctl_mutex);
161
162 if (error != -ENOIOCTLCMD)
163 goto done;
164
165 error = atm_dev_ioctl(cmd, argp, compat);
166
167done:
168 return error;
169}
170
171int vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
172{
173 return do_vcc_ioctl(sock, cmd, arg, 0);
174}
175
176#ifdef CONFIG_COMPAT
177
178
179
180
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182
183
184
185
186
187#define ATM_GETLINKRATE32 _IOW('a', ATMIOC_ITF+1, struct compat_atmif_sioc)
188#define ATM_GETNAMES32 _IOW('a', ATMIOC_ITF+3, struct compat_atm_iobuf)
189#define ATM_GETTYPE32 _IOW('a', ATMIOC_ITF+4, struct compat_atmif_sioc)
190#define ATM_GETESI32 _IOW('a', ATMIOC_ITF+5, struct compat_atmif_sioc)
191#define ATM_GETADDR32 _IOW('a', ATMIOC_ITF+6, struct compat_atmif_sioc)
192#define ATM_RSTADDR32 _IOW('a', ATMIOC_ITF+7, struct compat_atmif_sioc)
193#define ATM_ADDADDR32 _IOW('a', ATMIOC_ITF+8, struct compat_atmif_sioc)
194#define ATM_DELADDR32 _IOW('a', ATMIOC_ITF+9, struct compat_atmif_sioc)
195#define ATM_GETCIRANGE32 _IOW('a', ATMIOC_ITF+10, struct compat_atmif_sioc)
196#define ATM_SETCIRANGE32 _IOW('a', ATMIOC_ITF+11, struct compat_atmif_sioc)
197#define ATM_SETESI32 _IOW('a', ATMIOC_ITF+12, struct compat_atmif_sioc)
198#define ATM_SETESIF32 _IOW('a', ATMIOC_ITF+13, struct compat_atmif_sioc)
199#define ATM_GETSTAT32 _IOW('a', ATMIOC_SARCOM+0, struct compat_atmif_sioc)
200#define ATM_GETSTATZ32 _IOW('a', ATMIOC_SARCOM+1, struct compat_atmif_sioc)
201#define ATM_GETLOOP32 _IOW('a', ATMIOC_SARCOM+2, struct compat_atmif_sioc)
202#define ATM_SETLOOP32 _IOW('a', ATMIOC_SARCOM+3, struct compat_atmif_sioc)
203#define ATM_QUERYLOOP32 _IOW('a', ATMIOC_SARCOM+4, struct compat_atmif_sioc)
204
205static struct {
206 unsigned int cmd32;
207 unsigned int cmd;
208} atm_ioctl_map[] = {
209 { ATM_GETLINKRATE32, ATM_GETLINKRATE },
210 { ATM_GETNAMES32, ATM_GETNAMES },
211 { ATM_GETTYPE32, ATM_GETTYPE },
212 { ATM_GETESI32, ATM_GETESI },
213 { ATM_GETADDR32, ATM_GETADDR },
214 { ATM_RSTADDR32, ATM_RSTADDR },
215 { ATM_ADDADDR32, ATM_ADDADDR },
216 { ATM_DELADDR32, ATM_DELADDR },
217 { ATM_GETCIRANGE32, ATM_GETCIRANGE },
218 { ATM_SETCIRANGE32, ATM_SETCIRANGE },
219 { ATM_SETESI32, ATM_SETESI },
220 { ATM_SETESIF32, ATM_SETESIF },
221 { ATM_GETSTAT32, ATM_GETSTAT },
222 { ATM_GETSTATZ32, ATM_GETSTATZ },
223 { ATM_GETLOOP32, ATM_GETLOOP },
224 { ATM_SETLOOP32, ATM_SETLOOP },
225 { ATM_QUERYLOOP32, ATM_QUERYLOOP },
226};
227
228#define NR_ATM_IOCTL ARRAY_SIZE(atm_ioctl_map)
229
230static int do_atm_iobuf(struct socket *sock, unsigned int cmd,
231 unsigned long arg)
232{
233 struct atm_iobuf __user *iobuf;
234 struct compat_atm_iobuf __user *iobuf32;
235 u32 data;
236 void __user *datap;
237 int len, err;
238
239 iobuf = compat_alloc_user_space(sizeof(*iobuf));
240 iobuf32 = compat_ptr(arg);
241
242 if (get_user(len, &iobuf32->length) ||
243 get_user(data, &iobuf32->buffer))
244 return -EFAULT;
245 datap = compat_ptr(data);
246 if (put_user(len, &iobuf->length) ||
247 put_user(datap, &iobuf->buffer))
248 return -EFAULT;
249
250 err = do_vcc_ioctl(sock, cmd, (unsigned long) iobuf, 0);
251
252 if (!err) {
253 if (copy_in_user(&iobuf32->length, &iobuf->length,
254 sizeof(int)))
255 err = -EFAULT;
256 }
257
258 return err;
259}
260
261static int do_atmif_sioc(struct socket *sock, unsigned int cmd,
262 unsigned long arg)
263{
264 struct atmif_sioc __user *sioc;
265 struct compat_atmif_sioc __user *sioc32;
266 u32 data;
267 void __user *datap;
268 int err;
269
270 sioc = compat_alloc_user_space(sizeof(*sioc));
271 sioc32 = compat_ptr(arg);
272
273 if (copy_in_user(&sioc->number, &sioc32->number, 2 * sizeof(int)) ||
274 get_user(data, &sioc32->arg))
275 return -EFAULT;
276 datap = compat_ptr(data);
277 if (put_user(datap, &sioc->arg))
278 return -EFAULT;
279
280 err = do_vcc_ioctl(sock, cmd, (unsigned long) sioc, 0);
281
282 if (!err) {
283 if (copy_in_user(&sioc32->length, &sioc->length,
284 sizeof(int)))
285 err = -EFAULT;
286 }
287 return err;
288}
289
290static int do_atm_ioctl(struct socket *sock, unsigned int cmd32,
291 unsigned long arg)
292{
293 int i;
294 unsigned int cmd = 0;
295
296 switch (cmd32) {
297 case SONET_GETSTAT:
298 case SONET_GETSTATZ:
299 case SONET_GETDIAG:
300 case SONET_SETDIAG:
301 case SONET_CLRDIAG:
302 case SONET_SETFRAMING:
303 case SONET_GETFRAMING:
304 case SONET_GETFRSENSE:
305 return do_atmif_sioc(sock, cmd32, arg);
306 }
307
308 for (i = 0; i < NR_ATM_IOCTL; i++) {
309 if (cmd32 == atm_ioctl_map[i].cmd32) {
310 cmd = atm_ioctl_map[i].cmd;
311 break;
312 }
313 }
314 if (i == NR_ATM_IOCTL)
315 return -EINVAL;
316
317 switch (cmd) {
318 case ATM_GETNAMES:
319 return do_atm_iobuf(sock, cmd, arg);
320
321 case ATM_GETLINKRATE:
322 case ATM_GETTYPE:
323 case ATM_GETESI:
324 case ATM_GETADDR:
325 case ATM_RSTADDR:
326 case ATM_ADDADDR:
327 case ATM_DELADDR:
328 case ATM_GETCIRANGE:
329 case ATM_SETCIRANGE:
330 case ATM_SETESI:
331 case ATM_SETESIF:
332 case ATM_GETSTAT:
333 case ATM_GETSTATZ:
334 case ATM_GETLOOP:
335 case ATM_SETLOOP:
336 case ATM_QUERYLOOP:
337 return do_atmif_sioc(sock, cmd, arg);
338 }
339
340 return -EINVAL;
341}
342
343int vcc_compat_ioctl(struct socket *sock, unsigned int cmd,
344 unsigned long arg)
345{
346 int ret;
347
348 ret = do_vcc_ioctl(sock, cmd, arg, 1);
349 if (ret != -ENOIOCTLCMD)
350 return ret;
351
352 return do_atm_ioctl(sock, cmd, arg);
353}
354#endif
355
