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xen: do not map the same GSI twice in PVHVM guests.
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / net / compat.c
CommitLineData
4768fbcb 1/*
1da177e4
LT		 2 * 32bit Socket syscall emulation. Based on arch/sparc64/kernel/sys_sparc32.c.
3 *
4 * Copyright (C) 2000 VA Linux Co
5 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
6 * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com>
7 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
8 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
9 * Copyright (C) 2000 Hewlett-Packard Co.
10 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
4768fbcb 11 * Copyright (C) 2000,2001 Andi Kleen, SuSE Labs
1da177e4
LT		 12 */
13
14#include <linux/kernel.h>
5a0e3ad6 15#include <linux/gfp.h>
1da177e4 16#include <linux/fs.h>
1da177e4
LT		 17#include <linux/types.h>
18#include <linux/file.h>
19#include <linux/icmpv6.h>
20#include <linux/socket.h>
21#include <linux/syscalls.h>
22#include <linux/filter.h>
23#include <linux/compat.h>
1da177e4 24#include <linux/security.h>
bc3b2d7f 25#include <linux/export.h>
1da177e4
LT		 26
27#include <net/scm.h>
28#include <net/sock.h>
dae50295
DS		 29#include <net/ip.h>
30#include <net/ipv6.h>
1da177e4
LT		 31#include <asm/uaccess.h>
32#include <net/compat.h>
33
34static inline int iov_from_user_compat_to_kern(struct iovec *kiov,
35 struct compat_iovec __user *uiov32,
36 int niov)
37{
38 int tot_len = 0;
39
e71a4783 40 while (niov > 0) {
1da177e4
LT		 41 compat_uptr_t buf;
42 compat_size_t len;
43
e71a4783 44 if (get_user(len, &uiov32->iov_len) ||
8acfe468
DM		 45 get_user(buf, &uiov32->iov_base))
46 return -EFAULT;
47
48 if (len > INT_MAX - tot_len)
49 len = INT_MAX - tot_len;
50
1da177e4
LT		 51 tot_len += len;
52 kiov->iov_base = compat_ptr(buf);
53 kiov->iov_len = (__kernel_size_t) len;
54 uiov32++;
55 kiov++;
56 niov--;
57 }
58 return tot_len;
59}
60
61int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
62{
63 compat_uptr_t tmp1, tmp2, tmp3;
64
65 if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) ||
66 __get_user(tmp1, &umsg->msg_name) ||
67 __get_user(kmsg->msg_namelen, &umsg->msg_namelen) ||
68 __get_user(tmp2, &umsg->msg_iov) ||
69 __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) ||
70 __get_user(tmp3, &umsg->msg_control) ||
71 __get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
72 __get_user(kmsg->msg_flags, &umsg->msg_flags))
73 return -EFAULT;
74 kmsg->msg_name = compat_ptr(tmp1);
75 kmsg->msg_iov = compat_ptr(tmp2);
76 kmsg->msg_control = compat_ptr(tmp3);
77 return 0;
78}
79
80/* I've named the args so it is easy to tell whose space the pointers are in. */
81int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
43db362d 82 struct sockaddr_storage *kern_address, int mode)
1da177e4
LT		 83{
84 int tot_len;
85
e71a4783 86 if (kern_msg->msg_namelen) {
c6d409cf 87 if (mode == VERIFY_READ) {
1da177e4
LT		 88 int err = move_addr_to_kernel(kern_msg->msg_name,
89 kern_msg->msg_namelen,
90 kern_address);
e71a4783 91 if (err < 0)
1da177e4
LT		 92 return err;
93 }
94 kern_msg->msg_name = kern_address;
95 } else
96 kern_msg->msg_name = NULL;
97
1da177e4
LT		 98 tot_len = iov_from_user_compat_to_kern(kern_iov,
99 (struct compat_iovec __user *)kern_msg->msg_iov,
100 kern_msg->msg_iovlen);
e71a4783 101 if (tot_len >= 0)
1da177e4 102 kern_msg->msg_iov = kern_iov;
1da177e4
LT		 103
104 return tot_len;
105}
106
107/* Bleech... */
108#define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
109
110#define CMSG_COMPAT_DATA(cmsg) \
111 ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
112#define CMSG_COMPAT_SPACE(len) \
113 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
114#define CMSG_COMPAT_LEN(len) \
115 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len))
116
117#define CMSG_COMPAT_FIRSTHDR(msg) \
118 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
119 (struct compat_cmsghdr __user *)((msg)->msg_control) : \
120 (struct compat_cmsghdr __user *)NULL)
121
122#define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
123 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
124 (ucmlen) <= (unsigned long) \
125 ((mhdr)->msg_controllen - \
126 ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
127
128static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
129 struct compat_cmsghdr __user *cmsg, int cmsg_len)
130{
131 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
132 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
133 msg->msg_controllen)
134 return NULL;
135 return (struct compat_cmsghdr __user *)ptr;
136}
137
138/* There is a lot of hair here because the alignment rules (and
139 * thus placement) of cmsg headers and length are different for
140 * 32-bit apps. -DaveM
141 */
8920e8f9 142int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
1da177e4
LT		 143 unsigned char *stackbuf, int stackbuf_size)
144{
145 struct compat_cmsghdr __user *ucmsg;
146 struct cmsghdr *kcmsg, *kcmsg_base;
147 compat_size_t ucmlen;
148 __kernel_size_t kcmlen, tmp;
8920e8f9 149 int err = -EFAULT;
1da177e4
LT		 150
151 kcmlen = 0;
152 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
153 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
e71a4783
SH		 154 while (ucmsg != NULL) {
155 if (get_user(ucmlen, &ucmsg->cmsg_len))
1da177e4
LT		 156 return -EFAULT;
157
158 /* Catch bogons. */
159 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
160 return -EINVAL;
161
162 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
163 CMSG_ALIGN(sizeof(struct cmsghdr)));
8920e8f9 164 tmp = CMSG_ALIGN(tmp);
1da177e4
LT		 165 kcmlen += tmp;
166 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
167 }
e71a4783 168 if (kcmlen == 0)
1da177e4
LT		 169 return -EINVAL;
170
171 /* The kcmlen holds the 64-bit version of the control length.
172 * It may not be modified as we do not stick it into the kmsg
173 * until we have successfully copied over all of the data
174 * from the user.
175 */
8920e8f9
AV		 176 if (kcmlen > stackbuf_size)
177 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
178 if (kcmsg == NULL)
1da177e4
LT		 179 return -ENOBUFS;
180
181 /* Now copy them over neatly. */
182 memset(kcmsg, 0, kcmlen);
183 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
e71a4783 184 while (ucmsg != NULL) {
8920e8f9
AV		 185 if (__get_user(ucmlen, &ucmsg->cmsg_len))
186 goto Efault;
187 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
188 goto Einval;
1da177e4
LT		 189 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
190 CMSG_ALIGN(sizeof(struct cmsghdr)));
8920e8f9
AV		 191 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
192 goto Einval;
1da177e4 193 kcmsg->cmsg_len = tmp;
8920e8f9
AV		 194 tmp = CMSG_ALIGN(tmp);
195 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) ||
196 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) ||
197 copy_from_user(CMSG_DATA(kcmsg),
198 CMSG_COMPAT_DATA(ucmsg),
199 (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
200 goto Efault;
1da177e4
LT		 201
202 /* Advance. */
8920e8f9 203 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
1da177e4
LT		 204 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
205 }
206
207 /* Ok, looks like we made it. Hook it up and return success. */
208 kmsg->msg_control = kcmsg_base;
209 kmsg->msg_controllen = kcmlen;
210 return 0;
211
8920e8f9
AV		 212Einval:
213 err = -EINVAL;
214Efault:
215 if (kcmsg_base != (struct cmsghdr *)stackbuf)
216 sock_kfree_s(sk, kcmsg_base, kcmlen);
217 return err;
1da177e4
LT		 218}
219
220int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
221{
1da177e4
LT		 222 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
223 struct compat_cmsghdr cmhdr;
224 int cmlen;
225
e71a4783 226 if (cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
1da177e4
LT		 227 kmsg->msg_flags |= MSG_CTRUNC;
228 return 0; /* XXX: return error? check spec. */
229 }
230
ee4fa23c
L		 231 if (!COMPAT_USE_64BIT_TIME) {
232 struct compat_timeval ctv;
233 struct compat_timespec cts[3];
234 if (level == SOL_SOCKET && type == SCM_TIMESTAMP) {
235 struct timeval *tv = (struct timeval *)data;
236 ctv.tv_sec = tv->tv_sec;
237 ctv.tv_usec = tv->tv_usec;
238 data = &ctv;
239 len = sizeof(ctv);
240 }
241 if (level == SOL_SOCKET &&
242 (type == SCM_TIMESTAMPNS || type == SCM_TIMESTAMPING)) {
243 int count = type == SCM_TIMESTAMPNS ? 1 : 3;
244 int i;
245 struct timespec *ts = (struct timespec *)data;
246 for (i = 0; i < count; i++) {
247 cts[i].tv_sec = ts[i].tv_sec;
248 cts[i].tv_nsec = ts[i].tv_nsec;
249 }
250 data = &cts;
251 len = sizeof(cts[0]) * count;
20d49473 252 }
4768fbcb
YH		 253 }
254
1da177e4 255 cmlen = CMSG_COMPAT_LEN(len);
e71a4783 256 if (kmsg->msg_controllen < cmlen) {
1da177e4
LT		 257 kmsg->msg_flags |= MSG_CTRUNC;
258 cmlen = kmsg->msg_controllen;
259 }
260 cmhdr.cmsg_level = level;
261 cmhdr.cmsg_type = type;
262 cmhdr.cmsg_len = cmlen;
263
e71a4783 264 if (copy_to_user(cm, &cmhdr, sizeof cmhdr))
1da177e4 265 return -EFAULT;
e71a4783 266 if (copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
1da177e4
LT		 267 return -EFAULT;
268 cmlen = CMSG_COMPAT_SPACE(len);
1ac70e7a
WY		 269 if (kmsg->msg_controllen < cmlen)
270 cmlen = kmsg->msg_controllen;
1da177e4
LT		 271 kmsg->msg_control += cmlen;
272 kmsg->msg_controllen -= cmlen;
273 return 0;
274}
275
276void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
277{
278 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
279 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
280 int fdnum = scm->fp->count;
281 struct file **fp = scm->fp->fp;
282 int __user *cmfptr;
283 int err = 0, i;
284
285 if (fdnum < fdmax)
286 fdmax = fdnum;
287
288 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
289 int new_fd;
290 err = security_file_receive(fp[i]);
291 if (err)
292 break;
4a19542e
UD		 293 err = get_unused_fd_flags(MSG_CMSG_CLOEXEC & kmsg->msg_flags
294 ? O_CLOEXEC : 0);
1da177e4
LT		 295 if (err < 0)
296 break;
297 new_fd = err;
298 err = put_user(new_fd, cmfptr);
299 if (err) {
300 put_unused_fd(new_fd);
301 break;
302 }
303 /* Bump the usage count and install the file. */
304 get_file(fp[i]);
305 fd_install(new_fd, fp[i]);
306 }
307
308 if (i > 0) {
309 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
effee6a0 310 err = put_user(SOL_SOCKET, &cm->cmsg_level);
1da177e4
LT		 311 if (!err)
312 err = put_user(SCM_RIGHTS, &cm->cmsg_type);
313 if (!err)
314 err = put_user(cmlen, &cm->cmsg_len);
315 if (!err) {
316 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
317 kmsg->msg_control += cmlen;
318 kmsg->msg_controllen -= cmlen;
319 }
320 }
321 if (i < fdnum)
322 kmsg->msg_flags |= MSG_CTRUNC;
323
324 /*
325 * All of the files that fit in the message have had their
326 * usage counts incremented, so we just free the list.
327 */
328 __scm_destroy(scm);
329}
330
1da177e4
LT		 331/*
332 * A struct sock_filter is architecture independent.
333 */
334struct compat_sock_fprog {
335 u16 len;
336 compat_uptr_t filter; /* struct sock_filter * */
337};
338
3fdadf7d 339static int do_set_attach_filter(struct socket *sock, int level, int optname,
b7058842 340 char __user *optval, unsigned int optlen)
1da177e4
LT		 341{
342 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
4768fbcb 343 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
1da177e4
LT		 344 compat_uptr_t ptr;
345 u16 len;
346
347 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
348 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
349 __get_user(len, &fprog32->len) ||
350 __get_user(ptr, &fprog32->filter) ||
351 __put_user(len, &kfprog->len) ||
352 __put_user(compat_ptr(ptr), &kfprog->filter))
353 return -EFAULT;
354
3fdadf7d 355 return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
1da177e4
LT		 356 sizeof(struct sock_fprog));
357}
358
3fdadf7d 359static int do_set_sock_timeout(struct socket *sock, int level,
b7058842 360 int optname, char __user *optval, unsigned int optlen)
1da177e4 361{
c6d409cf 362 struct compat_timeval __user *up = (struct compat_timeval __user *)optval;
1da177e4
LT		 363 struct timeval ktime;
364 mm_segment_t old_fs;
365 int err;
366
367 if (optlen < sizeof(*up))
368 return -EINVAL;
369 if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
370 __get_user(ktime.tv_sec, &up->tv_sec) ||
371 __get_user(ktime.tv_usec, &up->tv_usec))
372 return -EFAULT;
373 old_fs = get_fs();
374 set_fs(KERNEL_DS);
c6d409cf 375 err = sock_setsockopt(sock, level, optname, (char *)&ktime, sizeof(ktime));
1da177e4
LT		 376 set_fs(old_fs);
377
378 return err;
379}
380
3fdadf7d 381static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
b7058842 382 char __user *optval, unsigned int optlen)
3fdadf7d
DM		 383{
384 if (optname == SO_ATTACH_FILTER)
385 return do_set_attach_filter(sock, level, optname,
386 optval, optlen);
387 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
388 return do_set_sock_timeout(sock, level, optname, optval, optlen);
389
390 return sock_setsockopt(sock, level, optname, optval, optlen);
391}
392
1da177e4 393asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
b7058842 394 char __user *optval, unsigned int optlen)
1da177e4 395{
3fdadf7d 396 int err;
c6d409cf 397 struct socket *sock = sockfd_lookup(fd, &err);
3fdadf7d 398
c6d409cf
ED		 399 if (sock) {
400 err = security_socket_setsockopt(sock, level, optname);
3fdadf7d
DM		 401 if (err) {
402 sockfd_put(sock);
403 return err;
404 }
405
406 if (level == SOL_SOCKET)
407 err = compat_sock_setsockopt(sock, level,
408 optname, optval, optlen);
409 else if (sock->ops->compat_setsockopt)
410 err = sock->ops->compat_setsockopt(sock, level,
411 optname, optval, optlen);
412 else
413 err = sock->ops->setsockopt(sock, level,
414 optname, optval, optlen);
415 sockfd_put(sock);
416 }
417 return err;
1da177e4
LT		 418}
419
3fdadf7d 420static int do_get_sock_timeout(struct socket *sock, int level, int optname,
1da177e4
LT		 421 char __user *optval, int __user *optlen)
422{
423 struct compat_timeval __user *up;
424 struct timeval ktime;
425 mm_segment_t old_fs;
426 int len, err;
427
428 up = (struct compat_timeval __user *) optval;
429 if (get_user(len, optlen))
430 return -EFAULT;
431 if (len < sizeof(*up))
432 return -EINVAL;
433 len = sizeof(ktime);
434 old_fs = get_fs();
435 set_fs(KERNEL_DS);
3fdadf7d 436 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
1da177e4
LT		 437 set_fs(old_fs);
438
439 if (!err) {
440 if (put_user(sizeof(*up), optlen) ||
441 !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
442 __put_user(ktime.tv_sec, &up->tv_sec) ||
443 __put_user(ktime.tv_usec, &up->tv_usec))
444 err = -EFAULT;
445 }
446 return err;
447}
448
3fdadf7d 449static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
1da177e4
LT		 450 char __user *optval, int __user *optlen)
451{
3fdadf7d
DM		 452 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
453 return do_get_sock_timeout(sock, level, optname, optval, optlen);
454 return sock_getsockopt(sock, level, optname, optval, optlen);
1da177e4
LT		 455}
456
f0ac2614
SP		 457int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
458{
ee4fa23c
L		 459 struct compat_timeval __user *ctv;
460 int err;
b7aa0bf7 461 struct timeval tv;
f0ac2614 462
ee4fa23c
L		 463 if (COMPAT_USE_64BIT_TIME)
464 return sock_get_timestamp(sk, userstamp);
465
466 ctv = (struct compat_timeval __user *) userstamp;
467 err = -ENOENT;
f0ac2614 468 if (!sock_flag(sk, SOCK_TIMESTAMP))
20d49473 469 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
b7aa0bf7
ED		 470 tv = ktime_to_timeval(sk->sk_stamp);
471 if (tv.tv_sec == -1)
f0ac2614 472 return err;
b7aa0bf7
ED		 473 if (tv.tv_sec == 0) {
474 sk->sk_stamp = ktime_get_real();
475 tv = ktime_to_timeval(sk->sk_stamp);
476 }
477 err = 0;
478 if (put_user(tv.tv_sec, &ctv->tv_sec) ||
479 put_user(tv.tv_usec, &ctv->tv_usec))
f0ac2614
SP		 480 err = -EFAULT;
481 return err;
482}
483EXPORT_SYMBOL(compat_sock_get_timestamp);
484
ae40eb1e
ED		 485int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
486{
ee4fa23c
L		 487 struct compat_timespec __user *ctv;
488 int err;
ae40eb1e
ED		 489 struct timespec ts;
490
ee4fa23c
L		 491 if (COMPAT_USE_64BIT_TIME)
492 return sock_get_timestampns (sk, userstamp);
493
494 ctv = (struct compat_timespec __user *) userstamp;
495 err = -ENOENT;
ae40eb1e 496 if (!sock_flag(sk, SOCK_TIMESTAMP))
20d49473 497 sock_enable_timestamp(sk, SOCK_TIMESTAMP);
ae40eb1e
ED		 498 ts = ktime_to_timespec(sk->sk_stamp);
499 if (ts.tv_sec == -1)
500 return err;
501 if (ts.tv_sec == 0) {
502 sk->sk_stamp = ktime_get_real();
503 ts = ktime_to_timespec(sk->sk_stamp);
504 }
505 err = 0;
506 if (put_user(ts.tv_sec, &ctv->tv_sec) ||
507 put_user(ts.tv_nsec, &ctv->tv_nsec))
508 err = -EFAULT;
509 return err;
510}
511EXPORT_SYMBOL(compat_sock_get_timestampns);
512
3fdadf7d
DM		 513asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
514 char __user *optval, int __user *optlen)
515{
516 int err;
c6d409cf 517 struct socket *sock = sockfd_lookup(fd, &err);
3fdadf7d 518
c6d409cf
ED		 519 if (sock) {
520 err = security_socket_getsockopt(sock, level, optname);
3fdadf7d
DM		 521 if (err) {
522 sockfd_put(sock);
523 return err;
524 }
525
526 if (level == SOL_SOCKET)
527 err = compat_sock_getsockopt(sock, level,
528 optname, optval, optlen);
529 else if (sock->ops->compat_getsockopt)
530 err = sock->ops->compat_getsockopt(sock, level,
531 optname, optval, optlen);
532 else
533 err = sock->ops->getsockopt(sock, level,
534 optname, optval, optlen);
535 sockfd_put(sock);
536 }
537 return err;
538}
dae50295
DS		 539
540struct compat_group_req {
541 __u32 gr_interface;
542 struct __kernel_sockaddr_storage gr_group
543 __attribute__ ((aligned(4)));
bc10502d 544} __packed;
dae50295
DS		 545
546struct compat_group_source_req {
547 __u32 gsr_interface;
548 struct __kernel_sockaddr_storage gsr_group
549 __attribute__ ((aligned(4)));
550 struct __kernel_sockaddr_storage gsr_source
551 __attribute__ ((aligned(4)));
bc10502d 552} __packed;
dae50295
DS		 553
554struct compat_group_filter {
555 __u32 gf_interface;
556 struct __kernel_sockaddr_storage gf_group
557 __attribute__ ((aligned(4)));
558 __u32 gf_fmode;
559 __u32 gf_numsrc;
560 struct __kernel_sockaddr_storage gf_slist[1]
561 __attribute__ ((aligned(4)));
bc10502d 562} __packed;
dae50295 563
be666e0a
DS		 564#define __COMPAT_GF0_SIZE (sizeof(struct compat_group_filter) - \
565 sizeof(struct __kernel_sockaddr_storage))
566
dae50295
DS		 567
568int compat_mc_setsockopt(struct sock *sock, int level, int optname,
b7058842 569 char __user *optval, unsigned int optlen,
c6d409cf 570 int (*setsockopt)(struct sock *, int, int, char __user *, unsigned int))
dae50295
DS		 571{
572 char __user *koptval = optval;
573 int koptlen = optlen;
574
575 switch (optname) {
576 case MCAST_JOIN_GROUP:
577 case MCAST_LEAVE_GROUP:
578 {
579 struct compat_group_req __user *gr32 = (void *)optval;
580 struct group_req __user *kgr =
581 compat_alloc_user_space(sizeof(struct group_req));
582 u32 interface;
583
584 if (!access_ok(VERIFY_READ, gr32, sizeof(*gr32)) ||
585 !access_ok(VERIFY_WRITE, kgr, sizeof(struct group_req)) ||
586 __get_user(interface, &gr32->gr_interface) ||
587 __put_user(interface, &kgr->gr_interface) ||
588 copy_in_user(&kgr->gr_group, &gr32->gr_group,
589 sizeof(kgr->gr_group)))
590 return -EFAULT;
591 koptval = (char __user *)kgr;
592 koptlen = sizeof(struct group_req);
593 break;
594 }
595 case MCAST_JOIN_SOURCE_GROUP:
596 case MCAST_LEAVE_SOURCE_GROUP:
597 case MCAST_BLOCK_SOURCE:
598 case MCAST_UNBLOCK_SOURCE:
599 {
600 struct compat_group_source_req __user *gsr32 = (void *)optval;
be666e0a 601 struct group_source_req __user *kgsr = compat_alloc_user_space(
dae50295
DS		 602 sizeof(struct group_source_req));
603 u32 interface;
604
605 if (!access_ok(VERIFY_READ, gsr32, sizeof(*gsr32)) ||
606 !access_ok(VERIFY_WRITE, kgsr,
607 sizeof(struct group_source_req)) ||
608 __get_user(interface, &gsr32->gsr_interface) ||
609 __put_user(interface, &kgsr->gsr_interface) ||
610 copy_in_user(&kgsr->gsr_group, &gsr32->gsr_group,
611 sizeof(kgsr->gsr_group)) ||
612 copy_in_user(&kgsr->gsr_source, &gsr32->gsr_source,
613 sizeof(kgsr->gsr_source)))
614 return -EFAULT;
615 koptval = (char __user *)kgsr;
616 koptlen = sizeof(struct group_source_req);
617 break;
618 }
619 case MCAST_MSFILTER:
620 {
621 struct compat_group_filter __user *gf32 = (void *)optval;
be666e0a 622 struct group_filter __user *kgf;
dae50295
DS		 623 u32 interface, fmode, numsrc;
624
be666e0a 625 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
dae50295
DS		 626 __get_user(interface, &gf32->gf_interface) ||
627 __get_user(fmode, &gf32->gf_fmode) ||
628 __get_user(numsrc, &gf32->gf_numsrc))
629 return -EFAULT;
630 koptlen = optlen + sizeof(struct group_filter) -
631 sizeof(struct compat_group_filter);
632 if (koptlen < GROUP_FILTER_SIZE(numsrc))
633 return -EINVAL;
634 kgf = compat_alloc_user_space(koptlen);
635 if (!access_ok(VERIFY_WRITE, kgf, koptlen) ||
636 __put_user(interface, &kgf->gf_interface) ||
637 __put_user(fmode, &kgf->gf_fmode) ||
638 __put_user(numsrc, &kgf->gf_numsrc) ||
639 copy_in_user(&kgf->gf_group, &gf32->gf_group,
640 sizeof(kgf->gf_group)) ||
be666e0a 641 (numsrc && copy_in_user(kgf->gf_slist, gf32->gf_slist,
dae50295
DS		 642 numsrc * sizeof(kgf->gf_slist[0]))))
643 return -EFAULT;
644 koptval = (char __user *)kgf;
645 break;
646 }
647
648 default:
649 break;
650 }
651 return setsockopt(sock, level, optname, koptval, koptlen);
652}
dae50295
DS		 653EXPORT_SYMBOL(compat_mc_setsockopt);
654
42908c69
DS		 655int compat_mc_getsockopt(struct sock *sock, int level, int optname,
656 char __user *optval, int __user *optlen,
c6d409cf 657 int (*getsockopt)(struct sock *, int, int, char __user *, int __user *))
42908c69
DS		 658{
659 struct compat_group_filter __user *gf32 = (void *)optval;
660 struct group_filter __user *kgf;
661 int __user *koptlen;
662 u32 interface, fmode, numsrc;
663 int klen, ulen, err;
664
665 if (optname != MCAST_MSFILTER)
666 return getsockopt(sock, level, optname, optval, optlen);
667
668 koptlen = compat_alloc_user_space(sizeof(*koptlen));
669 if (!access_ok(VERIFY_READ, optlen, sizeof(*optlen)) ||
670 __get_user(ulen, optlen))
671 return -EFAULT;
672
673 /* adjust len for pad */
674 klen = ulen + sizeof(*kgf) - sizeof(*gf32);
675
676 if (klen < GROUP_FILTER_SIZE(0))
677 return -EINVAL;
678
679 if (!access_ok(VERIFY_WRITE, koptlen, sizeof(*koptlen)) ||
680 __put_user(klen, koptlen))
681 return -EFAULT;
682
683 /* have to allow space for previous compat_alloc_user_space, too */
684 kgf = compat_alloc_user_space(klen+sizeof(*optlen));
685
686 if (!access_ok(VERIFY_READ, gf32, __COMPAT_GF0_SIZE) ||
687 __get_user(interface, &gf32->gf_interface) ||
688 __get_user(fmode, &gf32->gf_fmode) ||
689 __get_user(numsrc, &gf32->gf_numsrc) ||
690 __put_user(interface, &kgf->gf_interface) ||
691 __put_user(fmode, &kgf->gf_fmode) ||
692 __put_user(numsrc, &kgf->gf_numsrc) ||
c6d409cf 693 copy_in_user(&kgf->gf_group, &gf32->gf_group, sizeof(kgf->gf_group)))
42908c69
DS		 694 return -EFAULT;
695
696 err = getsockopt(sock, level, optname, (char __user *)kgf, koptlen);
697 if (err)
698 return err;
699
700 if (!access_ok(VERIFY_READ, koptlen, sizeof(*koptlen)) ||
701 __get_user(klen, koptlen))
702 return -EFAULT;
703
704 ulen = klen - (sizeof(*kgf)-sizeof(*gf32));
705
706 if (!access_ok(VERIFY_WRITE, optlen, sizeof(*optlen)) ||
707 __put_user(ulen, optlen))
708 return -EFAULT;
709
710 if (!access_ok(VERIFY_READ, kgf, klen) ||
711 !access_ok(VERIFY_WRITE, gf32, ulen) ||
712 __get_user(interface, &kgf->gf_interface) ||
713 __get_user(fmode, &kgf->gf_fmode) ||
714 __get_user(numsrc, &kgf->gf_numsrc) ||
715 __put_user(interface, &gf32->gf_interface) ||
716 __put_user(fmode, &gf32->gf_fmode) ||
717 __put_user(numsrc, &gf32->gf_numsrc))
718 return -EFAULT;
719 if (numsrc) {
720 int copylen;
721
722 klen -= GROUP_FILTER_SIZE(0);
723 copylen = numsrc * sizeof(gf32->gf_slist[0]);
724 if (copylen > klen)
725 copylen = klen;
c6d409cf 726 if (copy_in_user(gf32->gf_slist, kgf->gf_slist, copylen))
42908c69
DS		 727 return -EFAULT;
728 }
729 return err;
730}
42908c69
DS		 731EXPORT_SYMBOL(compat_mc_getsockopt);
732
dae50295 733
1da177e4
LT		 734/* Argument list sizes for compat_sys_socketcall */
735#define AL(x) ((x) * sizeof(u32))
228e548e 736static unsigned char nas[21] = {
c6d409cf
ED		 737 AL(0), AL(3), AL(3), AL(3), AL(2), AL(3),
738 AL(3), AL(3), AL(4), AL(4), AL(4), AL(6),
739 AL(6), AL(2), AL(5), AL(5), AL(3), AL(3),
228e548e 740 AL(4), AL(5), AL(4)
c6d409cf 741};
1da177e4
LT		 742#undef AL
743
744asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags)
745{
746 return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
747}
748
228e548e
AB		 749asmlinkage long compat_sys_sendmmsg(int fd, struct compat_mmsghdr __user *mmsg,
750 unsigned vlen, unsigned int flags)
751{
752 return __sys_sendmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
753 flags | MSG_CMSG_COMPAT);
754}
755
1da177e4
LT		 756asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
757{
758 return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
759}
760
1dacc76d
JB		 761asmlinkage long compat_sys_recv(int fd, void __user *buf, size_t len, unsigned flags)
762{
763 return sys_recv(fd, buf, len, flags | MSG_CMSG_COMPAT);
764}
765
766asmlinkage long compat_sys_recvfrom(int fd, void __user *buf, size_t len,
767 unsigned flags, struct sockaddr __user *addr,
768 int __user *addrlen)
769{
770 return sys_recvfrom(fd, buf, len, flags | MSG_CMSG_COMPAT, addr, addrlen);
771}
772
a2e27255
ACM		 773asmlinkage long compat_sys_recvmmsg(int fd, struct compat_mmsghdr __user *mmsg,
774 unsigned vlen, unsigned int flags,
60c2ffd3 775 struct compat_timespec __user *timeout)
a2e27255
ACM		 776{
777 int datagrams;
778 struct timespec ktspec;
a2e27255 779
ee4fa23c
L		 780 if (COMPAT_USE_64BIT_TIME)
781 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
782 flags | MSG_CMSG_COMPAT,
783 (struct timespec *) timeout);
784
5b23136b
JMG		 785 if (timeout == NULL)
786 return __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
787 flags | MSG_CMSG_COMPAT, NULL);
788
de039f02 789 if (get_compat_timespec(&ktspec, timeout))
a2e27255
ACM		 790 return -EFAULT;
791
792 datagrams = __sys_recvmmsg(fd, (struct mmsghdr __user *)mmsg, vlen,
793 flags | MSG_CMSG_COMPAT, &ktspec);
de039f02 794 if (datagrams > 0 && put_compat_timespec(&ktspec, timeout))
a2e27255
ACM		 795 datagrams = -EFAULT;
796
797 return datagrams;
798}
799
1da177e4
LT		 800asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
801{
802 int ret;
803 u32 a[6];
804 u32 a0, a1;
4768fbcb 805
228e548e 806 if (call < SYS_SOCKET || call > SYS_SENDMMSG)
1da177e4
LT		 807 return -EINVAL;
808 if (copy_from_user(a, args, nas[call]))
809 return -EFAULT;
810 a0 = a[0];
811 a1 = a[1];
4768fbcb 812
e71a4783 813 switch (call) {
1da177e4
LT		 814 case SYS_SOCKET:
815 ret = sys_socket(a0, a1, a[2]);
816 break;
817 case SYS_BIND:
818 ret = sys_bind(a0, compat_ptr(a1), a[2]);
819 break;
820 case SYS_CONNECT:
821 ret = sys_connect(a0, compat_ptr(a1), a[2]);
822 break;
823 case SYS_LISTEN:
824 ret = sys_listen(a0, a1);
825 break;
826 case SYS_ACCEPT:
de11defe 827 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), 0);
1da177e4
LT		 828 break;
829 case SYS_GETSOCKNAME:
830 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
831 break;
832 case SYS_GETPEERNAME:
833 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
834 break;
835 case SYS_SOCKETPAIR:
836 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
837 break;
838 case SYS_SEND:
839 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
840 break;
841 case SYS_SENDTO:
842 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
843 break;
844 case SYS_RECV:
1dacc76d 845 ret = compat_sys_recv(a0, compat_ptr(a1), a[2], a[3]);
1da177e4
LT		 846 break;
847 case SYS_RECVFROM:
1dacc76d
JB		 848 ret = compat_sys_recvfrom(a0, compat_ptr(a1), a[2], a[3],
849 compat_ptr(a[4]), compat_ptr(a[5]));
1da177e4
LT		 850 break;
851 case SYS_SHUTDOWN:
c6d409cf 852 ret = sys_shutdown(a0, a1);
1da177e4
LT		 853 break;
854 case SYS_SETSOCKOPT:
855 ret = compat_sys_setsockopt(a0, a1, a[2],
856 compat_ptr(a[3]), a[4]);
857 break;
858 case SYS_GETSOCKOPT:
859 ret = compat_sys_getsockopt(a0, a1, a[2],
860 compat_ptr(a[3]), compat_ptr(a[4]));
861 break;
862 case SYS_SENDMSG:
863 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
864 break;
228e548e
AB		 865 case SYS_SENDMMSG:
866 ret = compat_sys_sendmmsg(a0, compat_ptr(a1), a[2], a[3]);
867 break;
1da177e4
LT		 868 case SYS_RECVMSG:
869 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
870 break;
a2e27255
ACM		 871 case SYS_RECVMMSG:
872 ret = compat_sys_recvmmsg(a0, compat_ptr(a1), a[2], a[3],
873 compat_ptr(a[4]));
874 break;
de11defe
UD		 875 case SYS_ACCEPT4:
876 ret = sys_accept4(a0, compat_ptr(a1), compat_ptr(a[2]), a[3]);
aaca0bdc 877 break;
1da177e4
LT		 878 default:
879 ret = -EINVAL;
880 break;
881 }
882 return ret;
883}
kernel source for telekom puls (alcatel/mediatek)