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87 net_warn_ratelimited("ATM_SETSC is obsolete; used by %s:%d\n",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