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[UDP]: ipv6 style cleanup
[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>
15#include <linux/fs.h>
1da177e4
LT		 16#include <linux/types.h>
17#include <linux/file.h>
18#include <linux/icmpv6.h>
19#include <linux/socket.h>
20#include <linux/syscalls.h>
21#include <linux/filter.h>
22#include <linux/compat.h>
23#include <linux/netfilter_ipv4/ip_tables.h>
24#include <linux/security.h>
25
26#include <net/scm.h>
27#include <net/sock.h>
28#include <asm/uaccess.h>
29#include <net/compat.h>
30
31static inline int iov_from_user_compat_to_kern(struct iovec *kiov,
32 struct compat_iovec __user *uiov32,
33 int niov)
34{
35 int tot_len = 0;
36
37 while(niov > 0) {
38 compat_uptr_t buf;
39 compat_size_t len;
40
41 if(get_user(len, &uiov32->iov_len) ||
42 get_user(buf, &uiov32->iov_base)) {
43 tot_len = -EFAULT;
44 break;
45 }
46 tot_len += len;
47 kiov->iov_base = compat_ptr(buf);
48 kiov->iov_len = (__kernel_size_t) len;
49 uiov32++;
50 kiov++;
51 niov--;
52 }
53 return tot_len;
54}
55
56int get_compat_msghdr(struct msghdr *kmsg, struct compat_msghdr __user *umsg)
57{
58 compat_uptr_t tmp1, tmp2, tmp3;
59
60 if (!access_ok(VERIFY_READ, umsg, sizeof(*umsg)) ||
61 __get_user(tmp1, &umsg->msg_name) ||
62 __get_user(kmsg->msg_namelen, &umsg->msg_namelen) ||
63 __get_user(tmp2, &umsg->msg_iov) ||
64 __get_user(kmsg->msg_iovlen, &umsg->msg_iovlen) ||
65 __get_user(tmp3, &umsg->msg_control) ||
66 __get_user(kmsg->msg_controllen, &umsg->msg_controllen) ||
67 __get_user(kmsg->msg_flags, &umsg->msg_flags))
68 return -EFAULT;
69 kmsg->msg_name = compat_ptr(tmp1);
70 kmsg->msg_iov = compat_ptr(tmp2);
71 kmsg->msg_control = compat_ptr(tmp3);
72 return 0;
73}
74
75/* I've named the args so it is easy to tell whose space the pointers are in. */
76int verify_compat_iovec(struct msghdr *kern_msg, struct iovec *kern_iov,
77 char *kern_address, int mode)
78{
79 int tot_len;
80
81 if(kern_msg->msg_namelen) {
82 if(mode==VERIFY_READ) {
83 int err = move_addr_to_kernel(kern_msg->msg_name,
84 kern_msg->msg_namelen,
85 kern_address);
86 if(err < 0)
87 return err;
88 }
89 kern_msg->msg_name = kern_address;
90 } else
91 kern_msg->msg_name = NULL;
92
1da177e4
LT		 93 tot_len = iov_from_user_compat_to_kern(kern_iov,
94 (struct compat_iovec __user *)kern_msg->msg_iov,
95 kern_msg->msg_iovlen);
96 if(tot_len >= 0)
97 kern_msg->msg_iov = kern_iov;
1da177e4
LT		 98
99 return tot_len;
100}
101
102/* Bleech... */
103#define CMSG_COMPAT_ALIGN(len) ALIGN((len), sizeof(s32))
104
105#define CMSG_COMPAT_DATA(cmsg) \
106 ((void __user *)((char __user *)(cmsg) + CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr))))
107#define CMSG_COMPAT_SPACE(len) \
108 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + CMSG_COMPAT_ALIGN(len))
109#define CMSG_COMPAT_LEN(len) \
110 (CMSG_COMPAT_ALIGN(sizeof(struct compat_cmsghdr)) + (len))
111
112#define CMSG_COMPAT_FIRSTHDR(msg) \
113 (((msg)->msg_controllen) >= sizeof(struct compat_cmsghdr) ? \
114 (struct compat_cmsghdr __user *)((msg)->msg_control) : \
115 (struct compat_cmsghdr __user *)NULL)
116
117#define CMSG_COMPAT_OK(ucmlen, ucmsg, mhdr) \
118 ((ucmlen) >= sizeof(struct compat_cmsghdr) && \
119 (ucmlen) <= (unsigned long) \
120 ((mhdr)->msg_controllen - \
121 ((char *)(ucmsg) - (char *)(mhdr)->msg_control)))
122
123static inline struct compat_cmsghdr __user *cmsg_compat_nxthdr(struct msghdr *msg,
124 struct compat_cmsghdr __user *cmsg, int cmsg_len)
125{
126 char __user *ptr = (char __user *)cmsg + CMSG_COMPAT_ALIGN(cmsg_len);
127 if ((unsigned long)(ptr + 1 - (char __user *)msg->msg_control) >
128 msg->msg_controllen)
129 return NULL;
130 return (struct compat_cmsghdr __user *)ptr;
131}
132
133/* There is a lot of hair here because the alignment rules (and
134 * thus placement) of cmsg headers and length are different for
135 * 32-bit apps. -DaveM
136 */
8920e8f9 137int cmsghdr_from_user_compat_to_kern(struct msghdr *kmsg, struct sock *sk,
1da177e4
LT		 138 unsigned char *stackbuf, int stackbuf_size)
139{
140 struct compat_cmsghdr __user *ucmsg;
141 struct cmsghdr *kcmsg, *kcmsg_base;
142 compat_size_t ucmlen;
143 __kernel_size_t kcmlen, tmp;
8920e8f9 144 int err = -EFAULT;
1da177e4
LT		 145
146 kcmlen = 0;
147 kcmsg_base = kcmsg = (struct cmsghdr *)stackbuf;
148 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
149 while(ucmsg != NULL) {
150 if(get_user(ucmlen, &ucmsg->cmsg_len))
151 return -EFAULT;
152
153 /* Catch bogons. */
154 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
155 return -EINVAL;
156
157 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
158 CMSG_ALIGN(sizeof(struct cmsghdr)));
8920e8f9 159 tmp = CMSG_ALIGN(tmp);
1da177e4
LT		 160 kcmlen += tmp;
161 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
162 }
163 if(kcmlen == 0)
164 return -EINVAL;
165
166 /* The kcmlen holds the 64-bit version of the control length.
167 * It may not be modified as we do not stick it into the kmsg
168 * until we have successfully copied over all of the data
169 * from the user.
170 */
8920e8f9
AV		 171 if (kcmlen > stackbuf_size)
172 kcmsg_base = kcmsg = sock_kmalloc(sk, kcmlen, GFP_KERNEL);
173 if (kcmsg == NULL)
1da177e4
LT		 174 return -ENOBUFS;
175
176 /* Now copy them over neatly. */
177 memset(kcmsg, 0, kcmlen);
178 ucmsg = CMSG_COMPAT_FIRSTHDR(kmsg);
179 while(ucmsg != NULL) {
8920e8f9
AV		 180 if (__get_user(ucmlen, &ucmsg->cmsg_len))
181 goto Efault;
182 if (!CMSG_COMPAT_OK(ucmlen, ucmsg, kmsg))
183 goto Einval;
1da177e4
LT		 184 tmp = ((ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg))) +
185 CMSG_ALIGN(sizeof(struct cmsghdr)));
8920e8f9
AV		 186 if ((char *)kcmsg_base + kcmlen - (char *)kcmsg < CMSG_ALIGN(tmp))
187 goto Einval;
1da177e4 188 kcmsg->cmsg_len = tmp;
8920e8f9
AV		 189 tmp = CMSG_ALIGN(tmp);
190 if (__get_user(kcmsg->cmsg_level, &ucmsg->cmsg_level) ||
191 __get_user(kcmsg->cmsg_type, &ucmsg->cmsg_type) ||
192 copy_from_user(CMSG_DATA(kcmsg),
193 CMSG_COMPAT_DATA(ucmsg),
194 (ucmlen - CMSG_COMPAT_ALIGN(sizeof(*ucmsg)))))
195 goto Efault;
1da177e4
LT		 196
197 /* Advance. */
8920e8f9 198 kcmsg = (struct cmsghdr *)((char *)kcmsg + tmp);
1da177e4
LT		 199 ucmsg = cmsg_compat_nxthdr(kmsg, ucmsg, ucmlen);
200 }
201
202 /* Ok, looks like we made it. Hook it up and return success. */
203 kmsg->msg_control = kcmsg_base;
204 kmsg->msg_controllen = kcmlen;
205 return 0;
206
8920e8f9
AV		 207Einval:
208 err = -EINVAL;
209Efault:
210 if (kcmsg_base != (struct cmsghdr *)stackbuf)
211 sock_kfree_s(sk, kcmsg_base, kcmlen);
212 return err;
1da177e4
LT		 213}
214
215int put_cmsg_compat(struct msghdr *kmsg, int level, int type, int len, void *data)
216{
217 struct compat_timeval ctv;
218 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
219 struct compat_cmsghdr cmhdr;
220 int cmlen;
221
222 if(cm == NULL || kmsg->msg_controllen < sizeof(*cm)) {
223 kmsg->msg_flags |= MSG_CTRUNC;
224 return 0; /* XXX: return error? check spec. */
225 }
226
4768fbcb 227 if (level == SOL_SOCKET && type == SO_TIMESTAMP) {
1da177e4
LT		 228 struct timeval *tv = (struct timeval *)data;
229 ctv.tv_sec = tv->tv_sec;
230 ctv.tv_usec = tv->tv_usec;
231 data = &ctv;
232 len = sizeof(struct compat_timeval);
4768fbcb
YH		 233 }
234
1da177e4
LT		 235 cmlen = CMSG_COMPAT_LEN(len);
236 if(kmsg->msg_controllen < cmlen) {
237 kmsg->msg_flags |= MSG_CTRUNC;
238 cmlen = kmsg->msg_controllen;
239 }
240 cmhdr.cmsg_level = level;
241 cmhdr.cmsg_type = type;
242 cmhdr.cmsg_len = cmlen;
243
244 if(copy_to_user(cm, &cmhdr, sizeof cmhdr))
245 return -EFAULT;
246 if(copy_to_user(CMSG_COMPAT_DATA(cm), data, cmlen - sizeof(struct compat_cmsghdr)))
247 return -EFAULT;
248 cmlen = CMSG_COMPAT_SPACE(len);
249 kmsg->msg_control += cmlen;
250 kmsg->msg_controllen -= cmlen;
251 return 0;
252}
253
254void scm_detach_fds_compat(struct msghdr *kmsg, struct scm_cookie *scm)
255{
256 struct compat_cmsghdr __user *cm = (struct compat_cmsghdr __user *) kmsg->msg_control;
257 int fdmax = (kmsg->msg_controllen - sizeof(struct compat_cmsghdr)) / sizeof(int);
258 int fdnum = scm->fp->count;
259 struct file **fp = scm->fp->fp;
260 int __user *cmfptr;
261 int err = 0, i;
262
263 if (fdnum < fdmax)
264 fdmax = fdnum;
265
266 for (i = 0, cmfptr = (int __user *) CMSG_COMPAT_DATA(cm); i < fdmax; i++, cmfptr++) {
267 int new_fd;
268 err = security_file_receive(fp[i]);
269 if (err)
270 break;
271 err = get_unused_fd();
272 if (err < 0)
273 break;
274 new_fd = err;
275 err = put_user(new_fd, cmfptr);
276 if (err) {
277 put_unused_fd(new_fd);
278 break;
279 }
280 /* Bump the usage count and install the file. */
281 get_file(fp[i]);
282 fd_install(new_fd, fp[i]);
283 }
284
285 if (i > 0) {
286 int cmlen = CMSG_COMPAT_LEN(i * sizeof(int));
effee6a0 287 err = put_user(SOL_SOCKET, &cm->cmsg_level);
1da177e4
LT		 288 if (!err)
289 err = put_user(SCM_RIGHTS, &cm->cmsg_type);
290 if (!err)
291 err = put_user(cmlen, &cm->cmsg_len);
292 if (!err) {
293 cmlen = CMSG_COMPAT_SPACE(i * sizeof(int));
294 kmsg->msg_control += cmlen;
295 kmsg->msg_controllen -= cmlen;
296 }
297 }
298 if (i < fdnum)
299 kmsg->msg_flags |= MSG_CTRUNC;
300
301 /*
302 * All of the files that fit in the message have had their
303 * usage counts incremented, so we just free the list.
304 */
305 __scm_destroy(scm);
306}
307
308/*
309 * For now, we assume that the compatibility and native version
310 * of struct ipt_entry are the same - sfr. FIXME
311 */
312struct compat_ipt_replace {
313 char name[IPT_TABLE_MAXNAMELEN];
314 u32 valid_hooks;
315 u32 num_entries;
316 u32 size;
317 u32 hook_entry[NF_IP_NUMHOOKS];
318 u32 underflow[NF_IP_NUMHOOKS];
319 u32 num_counters;
320 compat_uptr_t counters; /* struct ipt_counters * */
321 struct ipt_entry entries[0];
322};
323
324static int do_netfilter_replace(int fd, int level, int optname,
325 char __user *optval, int optlen)
326{
327 struct compat_ipt_replace __user *urepl;
328 struct ipt_replace __user *repl_nat;
329 char name[IPT_TABLE_MAXNAMELEN];
330 u32 origsize, tmp32, num_counters;
331 unsigned int repl_nat_size;
332 int ret;
333 int i;
334 compat_uptr_t ucntrs;
335
336 urepl = (struct compat_ipt_replace __user *)optval;
337 if (get_user(origsize, &urepl->size))
338 return -EFAULT;
339
340 /* Hack: Causes ipchains to give correct error msg --RR */
341 if (optlen != sizeof(*urepl) + origsize)
342 return -ENOPROTOOPT;
343
344 /* XXX Assumes that size of ipt_entry is the same both in
345 * native and compat environments.
346 */
347 repl_nat_size = sizeof(*repl_nat) + origsize;
348 repl_nat = compat_alloc_user_space(repl_nat_size);
349
350 ret = -EFAULT;
351 if (put_user(origsize, &repl_nat->size))
352 goto out;
353
354 if (!access_ok(VERIFY_READ, urepl, optlen) ||
355 !access_ok(VERIFY_WRITE, repl_nat, optlen))
356 goto out;
357
358 if (__copy_from_user(name, urepl->name, sizeof(urepl->name)) ||
359 __copy_to_user(repl_nat->name, name, sizeof(repl_nat->name)))
360 goto out;
361
362 if (__get_user(tmp32, &urepl->valid_hooks) ||
363 __put_user(tmp32, &repl_nat->valid_hooks))
364 goto out;
365
366 if (__get_user(tmp32, &urepl->num_entries) ||
367 __put_user(tmp32, &repl_nat->num_entries))
368 goto out;
369
370 if (__get_user(num_counters, &urepl->num_counters) ||
371 __put_user(num_counters, &repl_nat->num_counters))
372 goto out;
373
374 if (__get_user(ucntrs, &urepl->counters) ||
375 __put_user(compat_ptr(ucntrs), &repl_nat->counters))
376 goto out;
377
378 if (__copy_in_user(&repl_nat->entries[0],
379 &urepl->entries[0],
380 origsize))
381 goto out;
382
383 for (i = 0; i < NF_IP_NUMHOOKS; i++) {
384 if (__get_user(tmp32, &urepl->hook_entry[i]) ||
385 __put_user(tmp32, &repl_nat->hook_entry[i]) ||
386 __get_user(tmp32, &urepl->underflow[i]) ||
387 __put_user(tmp32, &repl_nat->underflow[i]))
388 goto out;
389 }
390
391 /*
392 * Since struct ipt_counters just contains two u_int64_t members
393 * we can just do the access_ok check here and pass the (converted)
394 * pointer into the standard syscall. We hope that the pointer is
395 * not misaligned ...
396 */
397 if (!access_ok(VERIFY_WRITE, compat_ptr(ucntrs),
398 num_counters * sizeof(struct ipt_counters)))
399 goto out;
400
401
402 ret = sys_setsockopt(fd, level, optname,
403 (char __user *)repl_nat, repl_nat_size);
404
405out:
406 return ret;
407}
408
409/*
410 * A struct sock_filter is architecture independent.
411 */
412struct compat_sock_fprog {
413 u16 len;
414 compat_uptr_t filter; /* struct sock_filter * */
415};
416
3fdadf7d 417static int do_set_attach_filter(struct socket *sock, int level, int optname,
1da177e4
LT		 418 char __user *optval, int optlen)
419{
420 struct compat_sock_fprog __user *fprog32 = (struct compat_sock_fprog __user *)optval;
4768fbcb 421 struct sock_fprog __user *kfprog = compat_alloc_user_space(sizeof(struct sock_fprog));
1da177e4
LT		 422 compat_uptr_t ptr;
423 u16 len;
424
425 if (!access_ok(VERIFY_READ, fprog32, sizeof(*fprog32)) ||
426 !access_ok(VERIFY_WRITE, kfprog, sizeof(struct sock_fprog)) ||
427 __get_user(len, &fprog32->len) ||
428 __get_user(ptr, &fprog32->filter) ||
429 __put_user(len, &kfprog->len) ||
430 __put_user(compat_ptr(ptr), &kfprog->filter))
431 return -EFAULT;
432
3fdadf7d 433 return sock_setsockopt(sock, level, optname, (char __user *)kfprog,
1da177e4
LT		 434 sizeof(struct sock_fprog));
435}
436
3fdadf7d
DM		 437static int do_set_sock_timeout(struct socket *sock, int level,
438 int optname, char __user *optval, int optlen)
1da177e4
LT		 439{
440 struct compat_timeval __user *up = (struct compat_timeval __user *) optval;
441 struct timeval ktime;
442 mm_segment_t old_fs;
443 int err;
444
445 if (optlen < sizeof(*up))
446 return -EINVAL;
447 if (!access_ok(VERIFY_READ, up, sizeof(*up)) ||
448 __get_user(ktime.tv_sec, &up->tv_sec) ||
449 __get_user(ktime.tv_usec, &up->tv_usec))
450 return -EFAULT;
451 old_fs = get_fs();
452 set_fs(KERNEL_DS);
3fdadf7d 453 err = sock_setsockopt(sock, level, optname, (char *) &ktime, sizeof(ktime));
1da177e4
LT		 454 set_fs(old_fs);
455
456 return err;
457}
458
3fdadf7d
DM		 459static int compat_sock_setsockopt(struct socket *sock, int level, int optname,
460 char __user *optval, int optlen)
461{
462 if (optname == SO_ATTACH_FILTER)
463 return do_set_attach_filter(sock, level, optname,
464 optval, optlen);
465 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
466 return do_set_sock_timeout(sock, level, optname, optval, optlen);
467
468 return sock_setsockopt(sock, level, optname, optval, optlen);
469}
470
1da177e4
LT		 471asmlinkage long compat_sys_setsockopt(int fd, int level, int optname,
472 char __user *optval, int optlen)
473{
3fdadf7d
DM		 474 int err;
475 struct socket *sock;
476
2722971c 477 if (level == SOL_IPV6 && optname == IPT_SO_SET_REPLACE)
1da177e4
LT		 478 return do_netfilter_replace(fd, level, optname,
479 optval, optlen);
1da177e4 480
3fdadf7d
DM		 481 if (optlen < 0)
482 return -EINVAL;
483
484 if ((sock = sockfd_lookup(fd, &err))!=NULL)
485 {
486 err = security_socket_setsockopt(sock,level,optname);
487 if (err) {
488 sockfd_put(sock);
489 return err;
490 }
491
492 if (level == SOL_SOCKET)
493 err = compat_sock_setsockopt(sock, level,
494 optname, optval, optlen);
495 else if (sock->ops->compat_setsockopt)
496 err = sock->ops->compat_setsockopt(sock, level,
497 optname, optval, optlen);
498 else
499 err = sock->ops->setsockopt(sock, level,
500 optname, optval, optlen);
501 sockfd_put(sock);
502 }
503 return err;
1da177e4
LT		 504}
505
3fdadf7d 506static int do_get_sock_timeout(struct socket *sock, int level, int optname,
1da177e4
LT		 507 char __user *optval, int __user *optlen)
508{
509 struct compat_timeval __user *up;
510 struct timeval ktime;
511 mm_segment_t old_fs;
512 int len, err;
513
514 up = (struct compat_timeval __user *) optval;
515 if (get_user(len, optlen))
516 return -EFAULT;
517 if (len < sizeof(*up))
518 return -EINVAL;
519 len = sizeof(ktime);
520 old_fs = get_fs();
521 set_fs(KERNEL_DS);
3fdadf7d 522 err = sock_getsockopt(sock, level, optname, (char *) &ktime, &len);
1da177e4
LT		 523 set_fs(old_fs);
524
525 if (!err) {
526 if (put_user(sizeof(*up), optlen) ||
527 !access_ok(VERIFY_WRITE, up, sizeof(*up)) ||
528 __put_user(ktime.tv_sec, &up->tv_sec) ||
529 __put_user(ktime.tv_usec, &up->tv_usec))
530 err = -EFAULT;
531 }
532 return err;
533}
534
3fdadf7d 535static int compat_sock_getsockopt(struct socket *sock, int level, int optname,
1da177e4
LT		 536 char __user *optval, int __user *optlen)
537{
3fdadf7d
DM		 538 if (optname == SO_RCVTIMEO || optname == SO_SNDTIMEO)
539 return do_get_sock_timeout(sock, level, optname, optval, optlen);
540 return sock_getsockopt(sock, level, optname, optval, optlen);
1da177e4
LT		 541}
542
f0ac2614
SP		 543int compat_sock_get_timestamp(struct sock *sk, struct timeval __user *userstamp)
544{
545 struct compat_timeval __user *ctv =
546 (struct compat_timeval __user*) userstamp;
547 int err = -ENOENT;
b7aa0bf7 548 struct timeval tv;
f0ac2614
SP		 549
550 if (!sock_flag(sk, SOCK_TIMESTAMP))
551 sock_enable_timestamp(sk);
b7aa0bf7
ED		 552 tv = ktime_to_timeval(sk->sk_stamp);
553 if (tv.tv_sec == -1)
f0ac2614 554 return err;
b7aa0bf7
ED		 555 if (tv.tv_sec == 0) {
556 sk->sk_stamp = ktime_get_real();
557 tv = ktime_to_timeval(sk->sk_stamp);
558 }
559 err = 0;
560 if (put_user(tv.tv_sec, &ctv->tv_sec) ||
561 put_user(tv.tv_usec, &ctv->tv_usec))
f0ac2614
SP		 562 err = -EFAULT;
563 return err;
564}
565EXPORT_SYMBOL(compat_sock_get_timestamp);
566
ae40eb1e
ED		 567int compat_sock_get_timestampns(struct sock *sk, struct timespec __user *userstamp)
568{
569 struct compat_timespec __user *ctv =
570 (struct compat_timespec __user*) userstamp;
571 int err = -ENOENT;
572 struct timespec ts;
573
574 if (!sock_flag(sk, SOCK_TIMESTAMP))
575 sock_enable_timestamp(sk);
576 ts = ktime_to_timespec(sk->sk_stamp);
577 if (ts.tv_sec == -1)
578 return err;
579 if (ts.tv_sec == 0) {
580 sk->sk_stamp = ktime_get_real();
581 ts = ktime_to_timespec(sk->sk_stamp);
582 }
583 err = 0;
584 if (put_user(ts.tv_sec, &ctv->tv_sec) ||
585 put_user(ts.tv_nsec, &ctv->tv_nsec))
586 err = -EFAULT;
587 return err;
588}
589EXPORT_SYMBOL(compat_sock_get_timestampns);
590
3fdadf7d
DM		 591asmlinkage long compat_sys_getsockopt(int fd, int level, int optname,
592 char __user *optval, int __user *optlen)
593{
594 int err;
595 struct socket *sock;
596
597 if ((sock = sockfd_lookup(fd, &err))!=NULL)
598 {
599 err = security_socket_getsockopt(sock, level,
600 optname);
601 if (err) {
602 sockfd_put(sock);
603 return err;
604 }
605
606 if (level == SOL_SOCKET)
607 err = compat_sock_getsockopt(sock, level,
608 optname, optval, optlen);
609 else if (sock->ops->compat_getsockopt)
610 err = sock->ops->compat_getsockopt(sock, level,
611 optname, optval, optlen);
612 else
613 err = sock->ops->getsockopt(sock, level,
614 optname, optval, optlen);
615 sockfd_put(sock);
616 }
617 return err;
618}
1da177e4
LT		 619/* Argument list sizes for compat_sys_socketcall */
620#define AL(x) ((x) * sizeof(u32))
621static unsigned char nas[18]={AL(0),AL(3),AL(3),AL(3),AL(2),AL(3),
622 AL(3),AL(3),AL(4),AL(4),AL(4),AL(6),
623 AL(6),AL(2),AL(5),AL(5),AL(3),AL(3)};
624#undef AL
625
626asmlinkage long compat_sys_sendmsg(int fd, struct compat_msghdr __user *msg, unsigned flags)
627{
628 return sys_sendmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
629}
630
631asmlinkage long compat_sys_recvmsg(int fd, struct compat_msghdr __user *msg, unsigned int flags)
632{
633 return sys_recvmsg(fd, (struct msghdr __user *)msg, flags | MSG_CMSG_COMPAT);
634}
635
636asmlinkage long compat_sys_socketcall(int call, u32 __user *args)
637{
638 int ret;
639 u32 a[6];
640 u32 a0, a1;
4768fbcb 641
1da177e4
LT		 642 if (call < SYS_SOCKET || call > SYS_RECVMSG)
643 return -EINVAL;
644 if (copy_from_user(a, args, nas[call]))
645 return -EFAULT;
646 a0 = a[0];
647 a1 = a[1];
4768fbcb 648
1da177e4
LT		 649 switch(call) {
650 case SYS_SOCKET:
651 ret = sys_socket(a0, a1, a[2]);
652 break;
653 case SYS_BIND:
654 ret = sys_bind(a0, compat_ptr(a1), a[2]);
655 break;
656 case SYS_CONNECT:
657 ret = sys_connect(a0, compat_ptr(a1), a[2]);
658 break;
659 case SYS_LISTEN:
660 ret = sys_listen(a0, a1);
661 break;
662 case SYS_ACCEPT:
663 ret = sys_accept(a0, compat_ptr(a1), compat_ptr(a[2]));
664 break;
665 case SYS_GETSOCKNAME:
666 ret = sys_getsockname(a0, compat_ptr(a1), compat_ptr(a[2]));
667 break;
668 case SYS_GETPEERNAME:
669 ret = sys_getpeername(a0, compat_ptr(a1), compat_ptr(a[2]));
670 break;
671 case SYS_SOCKETPAIR:
672 ret = sys_socketpair(a0, a1, a[2], compat_ptr(a[3]));
673 break;
674 case SYS_SEND:
675 ret = sys_send(a0, compat_ptr(a1), a[2], a[3]);
676 break;
677 case SYS_SENDTO:
678 ret = sys_sendto(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), a[5]);
679 break;
680 case SYS_RECV:
681 ret = sys_recv(a0, compat_ptr(a1), a[2], a[3]);
682 break;
683 case SYS_RECVFROM:
684 ret = sys_recvfrom(a0, compat_ptr(a1), a[2], a[3], compat_ptr(a[4]), compat_ptr(a[5]));
685 break;
686 case SYS_SHUTDOWN:
687 ret = sys_shutdown(a0,a1);
688 break;
689 case SYS_SETSOCKOPT:
690 ret = compat_sys_setsockopt(a0, a1, a[2],
691 compat_ptr(a[3]), a[4]);
692 break;
693 case SYS_GETSOCKOPT:
694 ret = compat_sys_getsockopt(a0, a1, a[2],
695 compat_ptr(a[3]), compat_ptr(a[4]));
696 break;
697 case SYS_SENDMSG:
698 ret = compat_sys_sendmsg(a0, compat_ptr(a1), a[2]);
699 break;
700 case SYS_RECVMSG:
701 ret = compat_sys_recvmsg(a0, compat_ptr(a1), a[2]);
702 break;
703 default:
704 ret = -EINVAL;
705 break;
706 }
707 return ret;
708}
kernel source for telekom puls (alcatel/mediatek)