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6#define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__
7
8#include <linux/module.h>
9#include <linux/kmod.h>
10#include <linux/net.h>
11#include <linux/atm.h>
12#include <linux/atmdev.h>
13#include <linux/atmclip.h>
14#include <linux/atmarp.h>
15#include <linux/capability.h>
16#include <linux/sonet.h>
17#include <linux/atmsvc.h>
18#include <linux/atmmpc.h>
19#include <net/atmclip.h>
20#include <linux/atmlec.h>
21#include <linux/mutex.h>
22#include <asm/ioctls.h>
23#include <net/compat.h>
24
25#include "resources.h"
26#include "signaling.h"
27#include "common.h"
28
29
30static DEFINE_MUTEX(ioctl_mutex);
31static LIST_HEAD(ioctl_list);
32
33
34void register_atm_ioctl(struct atm_ioctl *ioctl)
35{
36 mutex_lock(&ioctl_mutex);
37 list_add_tail(&ioctl->list, &ioctl_list);
38 mutex_unlock(&ioctl_mutex);
39}
40EXPORT_SYMBOL(register_atm_ioctl);
41
42void deregister_atm_ioctl(struct atm_ioctl *ioctl)
43{
44 mutex_lock(&ioctl_mutex);
45 list_del(&ioctl->list);
46 mutex_unlock(&ioctl_mutex);
47}
48EXPORT_SYMBOL(deregister_atm_ioctl);
49
50static int do_vcc_ioctl(struct socket *sock, unsigned int cmd,
51 unsigned long arg, int compat)
52{
53 struct sock *sk = sock->sk;
54 struct atm_vcc *vcc;
55 int error;
56 struct list_head *pos;
57 void __user *argp = (void __user *)arg;
58
59 vcc = ATM_SD(sock);
60 switch (cmd) {
61 case SIOCOUTQ:
62 if (sock->state != SS_CONNECTED ||
63 !test_bit(ATM_VF_READY, &vcc->flags)) {
64 error = -EINVAL;
65 goto done;
66 }
67 error = put_user(sk->sk_sndbuf - sk_wmem_alloc_get(sk),
68 (int __user *)argp) ? -EFAULT : 0;
69 goto done;
70 case SIOCINQ:
71 {
72 struct sk_buff *skb;
73
74 if (sock->state != SS_CONNECTED) {
75 error = -EINVAL;
76 goto done;
77 }
78 skb = skb_peek(&sk->sk_receive_queue);
79 error = put_user(skb ? skb->len : 0,
80 (int __user *)argp) ? -EFAULT : 0;
81 goto done;
82 }
83 case SIOCGSTAMP:
84#ifdef CONFIG_COMPAT
85 if (compat)
86 error = compat_sock_get_timestamp(sk, argp);
87 else
88#endif
89 error = sock_get_timestamp(sk, argp);
90 goto done;
91 case SIOCGSTAMPNS:
92#ifdef CONFIG_COMPAT
93 if (compat)
94 error = compat_sock_get_timestampns(sk, argp);
95 else
96#endif
97 error = sock_get_timestampns(sk, argp);
98 goto done;
99 case ATM_SETSC:
100 net_warn_ratelimited("ATM_SETSC is obsolete; used by %s:%d\n",
101 current->comm, task_pid_nr(current));
102 error = 0;
103 goto done;
104 case ATMSIGD_CTRL:
105 if (!capable(CAP_NET_ADMIN)) {
106 error = -EPERM;
107 goto done;
108 }
109
110
111
112
113
114
115
116 if (!capable(CAP_SYS_RAWIO)) {
117 error = -EPERM;
118 goto done;
119 }
120#ifdef CONFIG_COMPAT
121
122
123
124 if (compat) {
125 net_warn_ratelimited("32-bit task cannot be atmsigd\n");
126 error = -EINVAL;
127 goto done;
128 }
129#endif
130 error = sigd_attach(vcc);
131 if (!error)
132 sock->state = SS_CONNECTED;
133 goto done;
134 case ATM_SETBACKEND:
135 case ATM_NEWBACKENDIF:
136 {
137 atm_backend_t backend;
138 error = get_user(backend, (atm_backend_t __user *)argp);
139 if (error)
140 goto done;
141 switch (backend) {
142 case ATM_BACKEND_PPP:
143 request_module("pppoatm");
144 break;
145 case ATM_BACKEND_BR2684:
146 request_module("br2684");
147 break;
148 }
149 break;
150 }
151 case ATMMPC_CTRL:
152 case ATMMPC_DATA:
153 request_module("mpoa");
154 break;
155 case ATMARPD_CTRL:
156 request_module("clip");
157 break;
158 case ATMLEC_CTRL:
159 request_module("lec");
160 break;
161 }
162
163 error = -ENOIOCTLCMD;
164
165 mutex_lock(&ioctl_mutex);
166 list_for_each(pos, &ioctl_list) {
167 struct atm_ioctl *ic = list_entry(pos, struct atm_ioctl, list);
168 if (try_module_get(ic->owner)) {
169 error = ic->ioctl(sock, cmd, arg);
170 module_put(ic->owner);
171 if (error != -ENOIOCTLCMD)
172 break;
173 }
174 }
175 mutex_unlock(&ioctl_mutex);
176
177 if (error != -ENOIOCTLCMD)
178 goto done;
179
180 error = atm_dev_ioctl(cmd, argp, compat);
181
182done:
183 return error;
184}
185
186int vcc_ioctl(struct socket *sock, unsigned int cmd, unsigned long arg)
187{
188 return do_vcc_ioctl(sock, cmd, arg, 0);
189}
190
191#ifdef CONFIG_COMPAT
192
193
194
195
196
197
198
199
200
201
202#define ATM_GETLINKRATE32 _IOW('a', ATMIOC_ITF+1, struct compat_atmif_sioc)
203#define ATM_GETNAMES32 _IOW('a', ATMIOC_ITF+3, struct compat_atm_iobuf)
204#define ATM_GETTYPE32 _IOW('a', ATMIOC_ITF+4, struct compat_atmif_sioc)
205#define ATM_GETESI32 _IOW('a', ATMIOC_ITF+5, struct compat_atmif_sioc)
206#define ATM_GETADDR32 _IOW('a', ATMIOC_ITF+6, struct compat_atmif_sioc)
207#define ATM_RSTADDR32 _IOW('a', ATMIOC_ITF+7, struct compat_atmif_sioc)
208#define ATM_ADDADDR32 _IOW('a', ATMIOC_ITF+8, struct compat_atmif_sioc)
209#define ATM_DELADDR32 _IOW('a', ATMIOC_ITF+9, struct compat_atmif_sioc)
210#define ATM_GETCIRANGE32 _IOW('a', ATMIOC_ITF+10, struct compat_atmif_sioc)
211#define ATM_SETCIRANGE32 _IOW('a', ATMIOC_ITF+11, struct compat_atmif_sioc)
212#define ATM_SETESI32 _IOW('a', ATMIOC_ITF+12, struct compat_atmif_sioc)
213#define ATM_SETESIF32 _IOW('a', ATMIOC_ITF+13, struct compat_atmif_sioc)
214#define ATM_GETSTAT32 _IOW('a', ATMIOC_SARCOM+0, struct compat_atmif_sioc)
215#define ATM_GETSTATZ32 _IOW('a', ATMIOC_SARCOM+1, struct compat_atmif_sioc)
216#define ATM_GETLOOP32 _IOW('a', ATMIOC_SARCOM+2, struct compat_atmif_sioc)
217#define ATM_SETLOOP32 _IOW('a', ATMIOC_SARCOM+3, struct compat_atmif_sioc)
218#define ATM_QUERYLOOP32 _IOW('a', ATMIOC_SARCOM+4, struct compat_atmif_sioc)
219
220static struct {
221 unsigned int cmd32;
222 unsigned int cmd;
223} atm_ioctl_map[] = {
224 { ATM_GETLINKRATE32, ATM_GETLINKRATE },
225 { ATM_GETNAMES32, ATM_GETNAMES },
226 { ATM_GETTYPE32, ATM_GETTYPE },
227 { ATM_GETESI32, ATM_GETESI },
228 { ATM_GETADDR32, ATM_GETADDR },
229 { ATM_RSTADDR32, ATM_RSTADDR },
230 { ATM_ADDADDR32, ATM_ADDADDR },
231 { ATM_DELADDR32, ATM_DELADDR },
232 { ATM_GETCIRANGE32, ATM_GETCIRANGE },
233 { ATM_SETCIRANGE32, ATM_SETCIRANGE },
234 { ATM_SETESI32, ATM_SETESI },
235 { ATM_SETESIF32, ATM_SETESIF },
236 { ATM_GETSTAT32, ATM_GETSTAT },
237 { ATM_GETSTATZ32, ATM_GETSTATZ },
238 { ATM_GETLOOP32, ATM_GETLOOP },
239 { ATM_SETLOOP32, ATM_SETLOOP },
240 { ATM_QUERYLOOP32, ATM_QUERYLOOP },
241};
242
243#define NR_ATM_IOCTL ARRAY_SIZE(atm_ioctl_map)
244
245static int do_atm_iobuf(struct socket *sock, unsigned int cmd,
246 unsigned long arg)
247{
248 struct atm_iobuf __user *iobuf;
249 struct compat_atm_iobuf __user *iobuf32;
250 u32 data;
251 void __user *datap;
252 int len, err;
253
254 iobuf = compat_alloc_user_space(sizeof(*iobuf));
255 iobuf32 = compat_ptr(arg);
256
257 if (get_user(len, &iobuf32->length) ||
258 get_user(data, &iobuf32->buffer))
259 return -EFAULT;
260 datap = compat_ptr(data);
261 if (put_user(len, &iobuf->length) ||
262 put_user(datap, &iobuf->buffer))
263 return -EFAULT;
264
265 err = do_vcc_ioctl(sock, cmd, (unsigned long) iobuf, 0);
266
267 if (!err) {
268 if (copy_in_user(&iobuf32->length, &iobuf->length,
269 sizeof(int)))
270 err = -EFAULT;
271 }
272
273 return err;
274}
275
276static int do_atmif_sioc(struct socket *sock, unsigned int cmd,
277 unsigned long arg)
278{
279 struct atmif_sioc __user *sioc;
280 struct compat_atmif_sioc __user *sioc32;
281 u32 data;
282 void __user *datap;
283 int err;
284
285 sioc = compat_alloc_user_space(sizeof(*sioc));
286 sioc32 = compat_ptr(arg);
287
288 if (copy_in_user(&sioc->number, &sioc32->number, 2 * sizeof(int)) ||
289 get_user(data, &sioc32->arg))
290 return -EFAULT;
291 datap = compat_ptr(data);
292 if (put_user(datap, &sioc->arg))
293 return -EFAULT;
294
295 err = do_vcc_ioctl(sock, cmd, (unsigned long) sioc, 0);
296
297 if (!err) {
298 if (copy_in_user(&sioc32->length, &sioc->length,
299 sizeof(int)))
300 err = -EFAULT;
301 }
302 return err;
303}
304
305static int do_atm_ioctl(struct socket *sock, unsigned int cmd32,
306 unsigned long arg)
307{
308 int i;
309 unsigned int cmd = 0;
310
311 switch (cmd32) {
312 case SONET_GETSTAT:
313 case SONET_GETSTATZ:
314 case SONET_GETDIAG:
315 case SONET_SETDIAG:
316 case SONET_CLRDIAG:
317 case SONET_SETFRAMING:
318 case SONET_GETFRAMING:
319 case SONET_GETFRSENSE:
320 return do_atmif_sioc(sock, cmd32, arg);
321 }
322
323 for (i = 0; i < NR_ATM_IOCTL; i++) {
324 if (cmd32 == atm_ioctl_map[i].cmd32) {
325 cmd = atm_ioctl_map[i].cmd;
326 break;
327 }
328 }
329 if (i == NR_ATM_IOCTL)
330 return -EINVAL;
331
332 switch (cmd) {
333 case ATM_GETNAMES:
334 return do_atm_iobuf(sock, cmd, arg);
335
336 case ATM_GETLINKRATE:
337 case ATM_GETTYPE:
338 case ATM_GETESI:
339 case ATM_GETADDR:
340 case ATM_RSTADDR:
341 case ATM_ADDADDR:
342 case ATM_DELADDR:
343 case ATM_GETCIRANGE:
344 case ATM_SETCIRANGE:
345 case ATM_SETESI:
346 case ATM_SETESIF:
347 case ATM_GETSTAT:
348 case ATM_GETSTATZ:
349 case ATM_GETLOOP:
350 case ATM_SETLOOP:
351 case ATM_QUERYLOOP:
352 return do_atmif_sioc(sock, cmd, arg);
353 }
354
355 return -EINVAL;
356}
357
358int vcc_compat_ioctl(struct socket *sock, unsigned int cmd,
359 unsigned long arg)
360{
361 int ret;
362
363 ret = do_vcc_ioctl(sock, cmd, arg, 1);
364 if (ret != -ENOIOCTLCMD)
365 return ret;
366
367 return do_atm_ioctl(sock, cmd, arg);
368}
369#endif
370
