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taskstats: remove initialization of static per-cpu variable
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / kernel / compat.c
CommitLineData
1da177e4
LT		 1/*
2 * linux/kernel/compat.c
3 *
4 * Kernel compatibililty routines for e.g. 32 bit syscall support
5 * on 64 bit kernels.
6 *
7 * Copyright (C) 2002-2003 Stephen Rothwell, IBM Corporation
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#include <linux/linkage.h>
15#include <linux/compat.h>
16#include <linux/errno.h>
17#include <linux/time.h>
18#include <linux/signal.h>
19#include <linux/sched.h> /* for MAX_SCHEDULE_TIMEOUT */
1da177e4
LT		 20#include <linux/syscalls.h>
21#include <linux/unistd.h>
22#include <linux/security.h>
3158e941 23#include <linux/timex.h>
1b2db9fb 24#include <linux/migrate.h>
1711ef38 25#include <linux/posix-timers.h>
1da177e4
LT		 26
27#include <asm/uaccess.h>
1da177e4
LT		 28
29int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts)
30{
31 return (!access_ok(VERIFY_READ, cts, sizeof(*cts)) ||
32 __get_user(ts->tv_sec, &cts->tv_sec) ||
33 __get_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0;
34}
35
36int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user *cts)
37{
38 return (!access_ok(VERIFY_WRITE, cts, sizeof(*cts)) ||
39 __put_user(ts->tv_sec, &cts->tv_sec) ||
40 __put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0;
41}
42
41652937
ON		 43static long compat_nanosleep_restart(struct restart_block *restart)
44{
45 struct compat_timespec __user *rmtp;
46 struct timespec rmt;
47 mm_segment_t oldfs;
48 long ret;
49
029a07e0 50 restart->nanosleep.rmtp = (struct timespec __user *) &rmt;
41652937
ON		 51 oldfs = get_fs();
52 set_fs(KERNEL_DS);
53 ret = hrtimer_nanosleep_restart(restart);
54 set_fs(oldfs);
55
56 if (ret) {
029a07e0 57 rmtp = restart->nanosleep.compat_rmtp;
41652937
ON		 58
59 if (rmtp && put_compat_timespec(&rmt, rmtp))
60 return -EFAULT;
61 }
62
63 return ret;
64}
65
1da177e4 66asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp,
c70878b4 67 struct compat_timespec __user *rmtp)
1da177e4 68{
c70878b4 69 struct timespec tu, rmt;
41652937 70 mm_segment_t oldfs;
c70878b4 71 long ret;
1da177e4 72
c70878b4 73 if (get_compat_timespec(&tu, rqtp))
1da177e4
LT		 74 return -EFAULT;
75
c70878b4 76 if (!timespec_valid(&tu))
1da177e4
LT		 77 return -EINVAL;
78
41652937
ON		 79 oldfs = get_fs();
80 set_fs(KERNEL_DS);
81 ret = hrtimer_nanosleep(&tu,
82 rmtp ? (struct timespec __user *)&rmt : NULL,
83 HRTIMER_MODE_REL, CLOCK_MONOTONIC);
84 set_fs(oldfs);
85
86 if (ret) {
87 struct restart_block *restart
88 = &current_thread_info()->restart_block;
89
90 restart->fn = compat_nanosleep_restart;
029a07e0 91 restart->nanosleep.compat_rmtp = rmtp;
1da177e4 92
41652937 93 if (rmtp && put_compat_timespec(&rmt, rmtp))
1da177e4
LT		 94 return -EFAULT;
95 }
c70878b4
AB		 96
97 return ret;
1da177e4
LT		 98}
99
100static inline long get_compat_itimerval(struct itimerval *o,
101 struct compat_itimerval __user *i)
102{
103 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
104 (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) |
105 __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) |
106 __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) |
107 __get_user(o->it_value.tv_usec, &i->it_value.tv_usec)));
108}
109
110static inline long put_compat_itimerval(struct compat_itimerval __user *o,
111 struct itimerval *i)
112{
113 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
114 (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) |
115 __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) |
116 __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) |
117 __put_user(i->it_value.tv_usec, &o->it_value.tv_usec)));
118}
119
120asmlinkage long compat_sys_getitimer(int which,
121 struct compat_itimerval __user *it)
122{
123 struct itimerval kit;
124 int error;
125
126 error = do_getitimer(which, &kit);
127 if (!error && put_compat_itimerval(it, &kit))
128 error = -EFAULT;
129 return error;
130}
131
132asmlinkage long compat_sys_setitimer(int which,
133 struct compat_itimerval __user *in,
134 struct compat_itimerval __user *out)
135{
136 struct itimerval kin, kout;
137 int error;
138
139 if (in) {
140 if (get_compat_itimerval(&kin, in))
141 return -EFAULT;
142 } else
143 memset(&kin, 0, sizeof(kin));
144
145 error = do_setitimer(which, &kin, out ? &kout : NULL);
146 if (error || !out)
147 return error;
148 if (put_compat_itimerval(out, &kout))
149 return -EFAULT;
150 return 0;
151}
152
153asmlinkage long compat_sys_times(struct compat_tms __user *tbuf)
154{
155 /*
156 * In the SMP world we might just be unlucky and have one of
157 * the times increment as we use it. Since the value is an
158 * atomically safe type this is just fine. Conceptually its
159 * as if the syscall took an instant longer to occur.
160 */
161 if (tbuf) {
162 struct compat_tms tmp;
163 struct task_struct *tsk = current;
164 struct task_struct *t;
165 cputime_t utime, stime, cutime, cstime;
166
167 read_lock(&tasklist_lock);
168 utime = tsk->signal->utime;
169 stime = tsk->signal->stime;
170 t = tsk;
171 do {
172 utime = cputime_add(utime, t->utime);
173 stime = cputime_add(stime, t->stime);
174 t = next_thread(t);
175 } while (t != tsk);
176
177 /*
178 * While we have tasklist_lock read-locked, no dying thread
179 * can be updating current->signal->[us]time. Instead,
180 * we got their counts included in the live thread loop.
181 * However, another thread can come in right now and
182 * do a wait call that updates current->signal->c[us]time.
183 * To make sure we always see that pair updated atomically,
184 * we take the siglock around fetching them.
185 */
186 spin_lock_irq(&tsk->sighand->siglock);
187 cutime = tsk->signal->cutime;
188 cstime = tsk->signal->cstime;
189 spin_unlock_irq(&tsk->sighand->siglock);
190 read_unlock(&tasklist_lock);
191
192 tmp.tms_utime = compat_jiffies_to_clock_t(cputime_to_jiffies(utime));
193 tmp.tms_stime = compat_jiffies_to_clock_t(cputime_to_jiffies(stime));
194 tmp.tms_cutime = compat_jiffies_to_clock_t(cputime_to_jiffies(cutime));
195 tmp.tms_cstime = compat_jiffies_to_clock_t(cputime_to_jiffies(cstime));
196 if (copy_to_user(tbuf, &tmp, sizeof(tmp)))
197 return -EFAULT;
198 }
199 return compat_jiffies_to_clock_t(jiffies);
200}
201
202/*
203 * Assumption: old_sigset_t and compat_old_sigset_t are both
204 * types that can be passed to put_user()/get_user().
205 */
206
207asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set)
208{
209 old_sigset_t s;
210 long ret;
211 mm_segment_t old_fs = get_fs();
212
213 set_fs(KERNEL_DS);
214 ret = sys_sigpending((old_sigset_t __user *) &s);
215 set_fs(old_fs);
216 if (ret == 0)
217 ret = put_user(s, set);
218 return ret;
219}
220
221asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *set,
222 compat_old_sigset_t __user *oset)
223{
224 old_sigset_t s;
225 long ret;
226 mm_segment_t old_fs;
227
228 if (set && get_user(s, set))
229 return -EFAULT;
230 old_fs = get_fs();
231 set_fs(KERNEL_DS);
232 ret = sys_sigprocmask(how,
233 set ? (old_sigset_t __user *) &s : NULL,
234 oset ? (old_sigset_t __user *) &s : NULL);
235 set_fs(old_fs);
236 if (ret == 0)
237 if (oset)
238 ret = put_user(s, oset);
239 return ret;
240}
241
1da177e4
LT		 242asmlinkage long compat_sys_setrlimit(unsigned int resource,
243 struct compat_rlimit __user *rlim)
244{
245 struct rlimit r;
246 int ret;
247 mm_segment_t old_fs = get_fs ();
248
bd3a8492
DW		 249 if (resource >= RLIM_NLIMITS)
250 return -EINVAL;
1da177e4
LT		 251
252 if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) ||
253 __get_user(r.rlim_cur, &rlim->rlim_cur) ||
254 __get_user(r.rlim_max, &rlim->rlim_max))
255 return -EFAULT;
256
257 if (r.rlim_cur == COMPAT_RLIM_INFINITY)
258 r.rlim_cur = RLIM_INFINITY;
259 if (r.rlim_max == COMPAT_RLIM_INFINITY)
260 r.rlim_max = RLIM_INFINITY;
261 set_fs(KERNEL_DS);
262 ret = sys_setrlimit(resource, (struct rlimit __user *) &r);
263 set_fs(old_fs);
264 return ret;
265}
266
267#ifdef COMPAT_RLIM_OLD_INFINITY
268
269asmlinkage long compat_sys_old_getrlimit(unsigned int resource,
270 struct compat_rlimit __user *rlim)
271{
272 struct rlimit r;
273 int ret;
274 mm_segment_t old_fs = get_fs();
275
276 set_fs(KERNEL_DS);
277 ret = sys_old_getrlimit(resource, &r);
278 set_fs(old_fs);
279
280 if (!ret) {
281 if (r.rlim_cur > COMPAT_RLIM_OLD_INFINITY)
282 r.rlim_cur = COMPAT_RLIM_INFINITY;
283 if (r.rlim_max > COMPAT_RLIM_OLD_INFINITY)
284 r.rlim_max = COMPAT_RLIM_INFINITY;
285
286 if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) ||
287 __put_user(r.rlim_cur, &rlim->rlim_cur) ||
288 __put_user(r.rlim_max, &rlim->rlim_max))
289 return -EFAULT;
290 }
291 return ret;
292}
293
294#endif
295
296asmlinkage long compat_sys_getrlimit (unsigned int resource,
297 struct compat_rlimit __user *rlim)
298{
299 struct rlimit r;
300 int ret;
301 mm_segment_t old_fs = get_fs();
302
303 set_fs(KERNEL_DS);
304 ret = sys_getrlimit(resource, (struct rlimit __user *) &r);
305 set_fs(old_fs);
306 if (!ret) {
307 if (r.rlim_cur > COMPAT_RLIM_INFINITY)
308 r.rlim_cur = COMPAT_RLIM_INFINITY;
309 if (r.rlim_max > COMPAT_RLIM_INFINITY)
310 r.rlim_max = COMPAT_RLIM_INFINITY;
311
312 if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) ||
313 __put_user(r.rlim_cur, &rlim->rlim_cur) ||
314 __put_user(r.rlim_max, &rlim->rlim_max))
315 return -EFAULT;
316 }
317 return ret;
318}
319
320int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru)
321{
322 if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)) ||
323 __put_user(r->ru_utime.tv_sec, &ru->ru_utime.tv_sec) ||
324 __put_user(r->ru_utime.tv_usec, &ru->ru_utime.tv_usec) ||
325 __put_user(r->ru_stime.tv_sec, &ru->ru_stime.tv_sec) ||
326 __put_user(r->ru_stime.tv_usec, &ru->ru_stime.tv_usec) ||
327 __put_user(r->ru_maxrss, &ru->ru_maxrss) ||
328 __put_user(r->ru_ixrss, &ru->ru_ixrss) ||
329 __put_user(r->ru_idrss, &ru->ru_idrss) ||
330 __put_user(r->ru_isrss, &ru->ru_isrss) ||
331 __put_user(r->ru_minflt, &ru->ru_minflt) ||
332 __put_user(r->ru_majflt, &ru->ru_majflt) ||
333 __put_user(r->ru_nswap, &ru->ru_nswap) ||
334 __put_user(r->ru_inblock, &ru->ru_inblock) ||
335 __put_user(r->ru_oublock, &ru->ru_oublock) ||
336 __put_user(r->ru_msgsnd, &ru->ru_msgsnd) ||
337 __put_user(r->ru_msgrcv, &ru->ru_msgrcv) ||
338 __put_user(r->ru_nsignals, &ru->ru_nsignals) ||
339 __put_user(r->ru_nvcsw, &ru->ru_nvcsw) ||
340 __put_user(r->ru_nivcsw, &ru->ru_nivcsw))
341 return -EFAULT;
342 return 0;
343}
344
345asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru)
346{
347 struct rusage r;
348 int ret;
349 mm_segment_t old_fs = get_fs();
350
351 set_fs(KERNEL_DS);
352 ret = sys_getrusage(who, (struct rusage __user *) &r);
353 set_fs(old_fs);
354
355 if (ret)
356 return ret;
357
358 if (put_compat_rusage(&r, ru))
359 return -EFAULT;
360
361 return 0;
362}
363
364asmlinkage long
365compat_sys_wait4(compat_pid_t pid, compat_uint_t __user *stat_addr, int options,
366 struct compat_rusage __user *ru)
367{
368 if (!ru) {
369 return sys_wait4(pid, stat_addr, options, NULL);
370 } else {
371 struct rusage r;
372 int ret;
373 unsigned int status;
374 mm_segment_t old_fs = get_fs();
375
376 set_fs (KERNEL_DS);
377 ret = sys_wait4(pid,
378 (stat_addr ?
379 (unsigned int __user *) &status : NULL),
380 options, (struct rusage __user *) &r);
381 set_fs (old_fs);
382
383 if (ret > 0) {
384 if (put_compat_rusage(&r, ru))
385 return -EFAULT;
386 if (stat_addr && put_user(status, stat_addr))
387 return -EFAULT;
388 }
389 return ret;
390 }
391}
392
393asmlinkage long compat_sys_waitid(int which, compat_pid_t pid,
394 struct compat_siginfo __user *uinfo, int options,
395 struct compat_rusage __user *uru)
396{
397 siginfo_t info;
398 struct rusage ru;
399 long ret;
400 mm_segment_t old_fs = get_fs();
401
402 memset(&info, 0, sizeof(info));
403
404 set_fs(KERNEL_DS);
405 ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options,
406 uru ? (struct rusage __user *)&ru : NULL);
407 set_fs(old_fs);
408
409 if ((ret < 0) || (info.si_signo == 0))
410 return ret;
411
412 if (uru) {
413 ret = put_compat_rusage(&ru, uru);
414 if (ret)
415 return ret;
416 }
417
418 BUG_ON(info.si_code & __SI_MASK);
419 info.si_code |= __SI_CHLD;
420 return copy_siginfo_to_user32(uinfo, &info);
421}
422
423static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr,
424 unsigned len, cpumask_t *new_mask)
425{
426 unsigned long *k;
427
428 if (len < sizeof(cpumask_t))
429 memset(new_mask, 0, sizeof(cpumask_t));
430 else if (len > sizeof(cpumask_t))
431 len = sizeof(cpumask_t);
432
433 k = cpus_addr(*new_mask);
434 return compat_get_bitmap(k, user_mask_ptr, len * 8);
435}
436
437asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
438 unsigned int len,
439 compat_ulong_t __user *user_mask_ptr)
440{
441 cpumask_t new_mask;
442 int retval;
443
444 retval = compat_get_user_cpu_mask(user_mask_ptr, len, &new_mask);
445 if (retval)
446 return retval;
447
b53e921b 448 return sched_setaffinity(pid, &new_mask);
1da177e4
LT		 449}
450
451asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len,
452 compat_ulong_t __user *user_mask_ptr)
453{
454 int ret;
455 cpumask_t mask;
456 unsigned long *k;
457 unsigned int min_length = sizeof(cpumask_t);
458
459 if (NR_CPUS <= BITS_PER_COMPAT_LONG)
460 min_length = sizeof(compat_ulong_t);
461
462 if (len < min_length)
463 return -EINVAL;
464
465 ret = sched_getaffinity(pid, &mask);
466 if (ret < 0)
467 return ret;
468
469 k = cpus_addr(mask);
470 ret = compat_put_bitmap(user_mask_ptr, k, min_length * 8);
471 if (ret)
472 return ret;
473
474 return min_length;
475}
476
83f5d126
DL		 477int get_compat_itimerspec(struct itimerspec *dst,
478 const struct compat_itimerspec __user *src)
bd3a8492 479{
1da177e4
LT		 480 if (get_compat_timespec(&dst->it_interval, &src->it_interval) ||
481 get_compat_timespec(&dst->it_value, &src->it_value))
482 return -EFAULT;
483 return 0;
bd3a8492 484}
1da177e4 485
83f5d126
DL		 486int put_compat_itimerspec(struct compat_itimerspec __user *dst,
487 const struct itimerspec *src)
bd3a8492 488{
1da177e4
LT		 489 if (put_compat_timespec(&src->it_interval, &dst->it_interval) ||
490 put_compat_timespec(&src->it_value, &dst->it_value))
491 return -EFAULT;
492 return 0;
bd3a8492 493}
1da177e4 494
3a0f69d5
CH		 495long compat_sys_timer_create(clockid_t which_clock,
496 struct compat_sigevent __user *timer_event_spec,
497 timer_t __user *created_timer_id)
498{
499 struct sigevent __user *event = NULL;
500
501 if (timer_event_spec) {
502 struct sigevent kevent;
503
504 event = compat_alloc_user_space(sizeof(*event));
505 if (get_compat_sigevent(&kevent, timer_event_spec) ||
506 copy_to_user(event, &kevent, sizeof(*event)))
507 return -EFAULT;
508 }
509
510 return sys_timer_create(which_clock, event, created_timer_id);
511}
512
1da177e4 513long compat_sys_timer_settime(timer_t timer_id, int flags,
bd3a8492 514 struct compat_itimerspec __user *new,
1da177e4 515 struct compat_itimerspec __user *old)
bd3a8492 516{
1da177e4
LT		 517 long err;
518 mm_segment_t oldfs;
519 struct itimerspec newts, oldts;
520
521 if (!new)
522 return -EINVAL;
523 if (get_compat_itimerspec(&newts, new))
bd3a8492 524 return -EFAULT;
1da177e4
LT		 525 oldfs = get_fs();
526 set_fs(KERNEL_DS);
527 err = sys_timer_settime(timer_id, flags,
528 (struct itimerspec __user *) &newts,
529 (struct itimerspec __user *) &oldts);
bd3a8492 530 set_fs(oldfs);
1da177e4
LT		 531 if (!err && old && put_compat_itimerspec(old, &oldts))
532 return -EFAULT;
533 return err;
bd3a8492 534}
1da177e4
LT		 535
536long compat_sys_timer_gettime(timer_t timer_id,
537 struct compat_itimerspec __user *setting)
bd3a8492 538{
1da177e4
LT		 539 long err;
540 mm_segment_t oldfs;
bd3a8492 541 struct itimerspec ts;
1da177e4
LT		 542
543 oldfs = get_fs();
544 set_fs(KERNEL_DS);
545 err = sys_timer_gettime(timer_id,
bd3a8492
DW		 546 (struct itimerspec __user *) &ts);
547 set_fs(oldfs);
1da177e4
LT		 548 if (!err && put_compat_itimerspec(setting, &ts))
549 return -EFAULT;
550 return err;
bd3a8492 551}
1da177e4
LT		 552
553long compat_sys_clock_settime(clockid_t which_clock,
554 struct compat_timespec __user *tp)
555{
556 long err;
557 mm_segment_t oldfs;
bd3a8492 558 struct timespec ts;
1da177e4
LT		 559
560 if (get_compat_timespec(&ts, tp))
bd3a8492 561 return -EFAULT;
1da177e4 562 oldfs = get_fs();
bd3a8492 563 set_fs(KERNEL_DS);
1da177e4
LT		 564 err = sys_clock_settime(which_clock,
565 (struct timespec __user *) &ts);
566 set_fs(oldfs);
567 return err;
bd3a8492 568}
1da177e4
LT		 569
570long compat_sys_clock_gettime(clockid_t which_clock,
571 struct compat_timespec __user *tp)
572{
573 long err;
574 mm_segment_t oldfs;
bd3a8492 575 struct timespec ts;
1da177e4
LT		 576
577 oldfs = get_fs();
578 set_fs(KERNEL_DS);
579 err = sys_clock_gettime(which_clock,
580 (struct timespec __user *) &ts);
581 set_fs(oldfs);
582 if (!err && put_compat_timespec(&ts, tp))
bd3a8492 583 return -EFAULT;
1da177e4 584 return err;
bd3a8492 585}
1da177e4
LT		 586
587long compat_sys_clock_getres(clockid_t which_clock,
588 struct compat_timespec __user *tp)
589{
590 long err;
591 mm_segment_t oldfs;
bd3a8492 592 struct timespec ts;
1da177e4
LT		 593
594 oldfs = get_fs();
595 set_fs(KERNEL_DS);
596 err = sys_clock_getres(which_clock,
597 (struct timespec __user *) &ts);
598 set_fs(oldfs);
599 if (!err && tp && put_compat_timespec(&ts, tp))
bd3a8492 600 return -EFAULT;
1da177e4 601 return err;
bd3a8492 602}
1da177e4 603
1711ef38
TA		 604static long compat_clock_nanosleep_restart(struct restart_block *restart)
605{
606 long err;
607 mm_segment_t oldfs;
608 struct timespec tu;
029a07e0 609 struct compat_timespec *rmtp = restart->nanosleep.compat_rmtp;
1711ef38 610
029a07e0 611 restart->nanosleep.rmtp = (struct timespec __user *) &tu;
1711ef38
TA		 612 oldfs = get_fs();
613 set_fs(KERNEL_DS);
614 err = clock_nanosleep_restart(restart);
615 set_fs(oldfs);
616
617 if ((err == -ERESTART_RESTARTBLOCK) && rmtp &&
618 put_compat_timespec(&tu, rmtp))
619 return -EFAULT;
620
621 if (err == -ERESTART_RESTARTBLOCK) {
622 restart->fn = compat_clock_nanosleep_restart;
029a07e0 623 restart->nanosleep.compat_rmtp = rmtp;
1711ef38
TA		 624 }
625 return err;
626}
627
1da177e4
LT		 628long compat_sys_clock_nanosleep(clockid_t which_clock, int flags,
629 struct compat_timespec __user *rqtp,
630 struct compat_timespec __user *rmtp)
631{
632 long err;
633 mm_segment_t oldfs;
bd3a8492 634 struct timespec in, out;
1711ef38 635 struct restart_block *restart;
1da177e4 636
bd3a8492 637 if (get_compat_timespec(&in, rqtp))
1da177e4
LT		 638 return -EFAULT;
639
640 oldfs = get_fs();
641 set_fs(KERNEL_DS);
642 err = sys_clock_nanosleep(which_clock, flags,
643 (struct timespec __user *) &in,
644 (struct timespec __user *) &out);
645 set_fs(oldfs);
1711ef38 646
1da177e4
LT		 647 if ((err == -ERESTART_RESTARTBLOCK) && rmtp &&
648 put_compat_timespec(&out, rmtp))
649 return -EFAULT;
1711ef38
TA		 650
651 if (err == -ERESTART_RESTARTBLOCK) {
652 restart = &current_thread_info()->restart_block;
653 restart->fn = compat_clock_nanosleep_restart;
029a07e0 654 restart->nanosleep.compat_rmtp = rmtp;
1711ef38 655 }
bd3a8492
DW		 656 return err;
657}
1da177e4
LT		 658
659/*
660 * We currently only need the following fields from the sigevent
661 * structure: sigev_value, sigev_signo, sig_notify and (sometimes
662 * sigev_notify_thread_id). The others are handled in user mode.
663 * We also assume that copying sigev_value.sival_int is sufficient
664 * to keep all the bits of sigev_value.sival_ptr intact.
665 */
666int get_compat_sigevent(struct sigevent *event,
667 const struct compat_sigevent __user *u_event)
668{
51410d3c 669 memset(event, 0, sizeof(*event));
1da177e4
LT		 670 return (!access_ok(VERIFY_READ, u_event, sizeof(*u_event)) ||
671 __get_user(event->sigev_value.sival_int,
672 &u_event->sigev_value.sival_int) ||
673 __get_user(event->sigev_signo, &u_event->sigev_signo) ||
674 __get_user(event->sigev_notify, &u_event->sigev_notify) ||
675 __get_user(event->sigev_notify_thread_id,
676 &u_event->sigev_notify_thread_id))
677 ? -EFAULT : 0;
678}
679
5fa3839a 680long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,
1da177e4
LT		 681 unsigned long bitmap_size)
682{
683 int i, j;
684 unsigned long m;
685 compat_ulong_t um;
686 unsigned long nr_compat_longs;
687
688 /* align bitmap up to nearest compat_long_t boundary */
689 bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG);
690
691 if (!access_ok(VERIFY_READ, umask, bitmap_size / 8))
692 return -EFAULT;
693
694 nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size);
695
696 for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) {
697 m = 0;
698
699 for (j = 0; j < sizeof(m)/sizeof(um); j++) {
700 /*
701 * We dont want to read past the end of the userspace
702 * bitmap. We must however ensure the end of the
703 * kernel bitmap is zeroed.
704 */
705 if (nr_compat_longs-- > 0) {
706 if (__get_user(um, umask))
707 return -EFAULT;
708 } else {
709 um = 0;
710 }
711
712 umask++;
713 m |= (long)um << (j * BITS_PER_COMPAT_LONG);
714 }
715 *mask++ = m;
716 }
717
718 return 0;
719}
720
721long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
722 unsigned long bitmap_size)
723{
724 int i, j;
725 unsigned long m;
726 compat_ulong_t um;
727 unsigned long nr_compat_longs;
728
729 /* align bitmap up to nearest compat_long_t boundary */
730 bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG);
731
732 if (!access_ok(VERIFY_WRITE, umask, bitmap_size / 8))
733 return -EFAULT;
734
735 nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size);
736
737 for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) {
738 m = *mask++;
739
740 for (j = 0; j < sizeof(m)/sizeof(um); j++) {
741 um = m;
742
743 /*
744 * We dont want to write past the end of the userspace
745 * bitmap.
746 */
747 if (nr_compat_longs-- > 0) {
748 if (__put_user(um, umask))
749 return -EFAULT;
750 }
751
752 umask++;
753 m >>= 4*sizeof(um);
754 m >>= 4*sizeof(um);
755 }
756 }
757
758 return 0;
759}
760
761void
762sigset_from_compat (sigset_t *set, compat_sigset_t *compat)
763{
764 switch (_NSIG_WORDS) {
1da177e4
LT		 765 case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 );
766 case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 );
767 case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 );
768 case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 );
1da177e4
LT		 769 }
770}
771
772asmlinkage long
773compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese,
774 struct compat_siginfo __user *uinfo,
775 struct compat_timespec __user *uts, compat_size_t sigsetsize)
776{
777 compat_sigset_t s32;
778 sigset_t s;
779 int sig;
780 struct timespec t;
781 siginfo_t info;
782 long ret, timeout = 0;
783
784 if (sigsetsize != sizeof(sigset_t))
785 return -EINVAL;
786
787 if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t)))
788 return -EFAULT;
789 sigset_from_compat(&s, &s32);
790 sigdelsetmask(&s,sigmask(SIGKILL)|sigmask(SIGSTOP));
791 signotset(&s);
792
793 if (uts) {
794 if (get_compat_timespec (&t, uts))
795 return -EFAULT;
796 if (t.tv_nsec >= 1000000000L || t.tv_nsec < 0
797 || t.tv_sec < 0)
798 return -EINVAL;
799 }
800
801 spin_lock_irq(&current->sighand->siglock);
802 sig = dequeue_signal(current, &s, &info);
803 if (!sig) {
804 timeout = MAX_SCHEDULE_TIMEOUT;
805 if (uts)
806 timeout = timespec_to_jiffies(&t)
807 +(t.tv_sec || t.tv_nsec);
808 if (timeout) {
809 current->real_blocked = current->blocked;
810 sigandsets(&current->blocked, &current->blocked, &s);
811
812 recalc_sigpending();
813 spin_unlock_irq(&current->sighand->siglock);
814
75bcc8c5 815 timeout = schedule_timeout_interruptible(timeout);
1da177e4
LT		 816
817 spin_lock_irq(&current->sighand->siglock);
818 sig = dequeue_signal(current, &s, &info);
819 current->blocked = current->real_blocked;
820 siginitset(&current->real_blocked, 0);
821 recalc_sigpending();
822 }
823 }
824 spin_unlock_irq(&current->sighand->siglock);
825
826 if (sig) {
827 ret = sig;
828 if (uinfo) {
829 if (copy_siginfo_to_user32(uinfo, &info))
830 ret = -EFAULT;
831 }
832 }else {
833 ret = timeout?-EINTR:-EAGAIN;
834 }
835 return ret;
836
837}
838
839#ifdef __ARCH_WANT_COMPAT_SYS_TIME
840
841/* compat_time_t is a 32 bit "long" and needs to get converted. */
842
843asmlinkage long compat_sys_time(compat_time_t __user * tloc)
844{
845 compat_time_t i;
846 struct timeval tv;
847
848 do_gettimeofday(&tv);
849 i = tv.tv_sec;
850
851 if (tloc) {
852 if (put_user(i,tloc))
853 i = -EFAULT;
854 }
855 return i;
856}
857
858asmlinkage long compat_sys_stime(compat_time_t __user *tptr)
859{
860 struct timespec tv;
861 int err;
862
863 if (get_user(tv.tv_sec, tptr))
864 return -EFAULT;
865
866 tv.tv_nsec = 0;
867
868 err = security_settime(&tv, NULL);
869 if (err)
870 return err;
871
872 do_settimeofday(&tv);
873 return 0;
874}
875
876#endif /* __ARCH_WANT_COMPAT_SYS_TIME */
150256d8
DW		 877
878#ifdef __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND
879asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize)
880{
881 sigset_t newset;
882 compat_sigset_t newset32;
883
884 /* XXX: Don't preclude handling different sized sigset_t's. */
885 if (sigsetsize != sizeof(sigset_t))
886 return -EINVAL;
887
888 if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t)))
889 return -EFAULT;
890 sigset_from_compat(&newset, &newset32);
891 sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP));
892
893 spin_lock_irq(&current->sighand->siglock);
894 current->saved_sigmask = current->blocked;
895 current->blocked = newset;
896 recalc_sigpending();
897 spin_unlock_irq(&current->sighand->siglock);
898
899 current->state = TASK_INTERRUPTIBLE;
900 schedule();
4e4c22c7 901 set_restore_sigmask();
150256d8
DW		 902 return -ERESTARTNOHAND;
903}
904#endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */
3158e941
SR		 905
906asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp)
907{
908 struct timex txc;
909 int ret;
910
911 memset(&txc, 0, sizeof(struct timex));
912
913 if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) ||
914 __get_user(txc.modes, &utp->modes) ||
915 __get_user(txc.offset, &utp->offset) ||
916 __get_user(txc.freq, &utp->freq) ||
917 __get_user(txc.maxerror, &utp->maxerror) ||
918 __get_user(txc.esterror, &utp->esterror) ||
919 __get_user(txc.status, &utp->status) ||
920 __get_user(txc.constant, &utp->constant) ||
921 __get_user(txc.precision, &utp->precision) ||
922 __get_user(txc.tolerance, &utp->tolerance) ||
923 __get_user(txc.time.tv_sec, &utp->time.tv_sec) ||
924 __get_user(txc.time.tv_usec, &utp->time.tv_usec) ||
925 __get_user(txc.tick, &utp->tick) ||
926 __get_user(txc.ppsfreq, &utp->ppsfreq) ||
927 __get_user(txc.jitter, &utp->jitter) ||
928 __get_user(txc.shift, &utp->shift) ||
929 __get_user(txc.stabil, &utp->stabil) ||
930 __get_user(txc.jitcnt, &utp->jitcnt) ||
931 __get_user(txc.calcnt, &utp->calcnt) ||
932 __get_user(txc.errcnt, &utp->errcnt) ||
933 __get_user(txc.stbcnt, &utp->stbcnt))
934 return -EFAULT;
935
936 ret = do_adjtimex(&txc);
937
938 if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) ||
939 __put_user(txc.modes, &utp->modes) ||
940 __put_user(txc.offset, &utp->offset) ||
941 __put_user(txc.freq, &utp->freq) ||
942 __put_user(txc.maxerror, &utp->maxerror) ||
943 __put_user(txc.esterror, &utp->esterror) ||
944 __put_user(txc.status, &utp->status) ||
945 __put_user(txc.constant, &utp->constant) ||
946 __put_user(txc.precision, &utp->precision) ||
947 __put_user(txc.tolerance, &utp->tolerance) ||
948 __put_user(txc.time.tv_sec, &utp->time.tv_sec) ||
949 __put_user(txc.time.tv_usec, &utp->time.tv_usec) ||
950 __put_user(txc.tick, &utp->tick) ||
951 __put_user(txc.ppsfreq, &utp->ppsfreq) ||
952 __put_user(txc.jitter, &utp->jitter) ||
953 __put_user(txc.shift, &utp->shift) ||
954 __put_user(txc.stabil, &utp->stabil) ||
955 __put_user(txc.jitcnt, &utp->jitcnt) ||
956 __put_user(txc.calcnt, &utp->calcnt) ||
957 __put_user(txc.errcnt, &utp->errcnt) ||
153b5d05
RZ		 958 __put_user(txc.stbcnt, &utp->stbcnt) ||
959 __put_user(txc.tai, &utp->tai))
3158e941
SR		 960 ret = -EFAULT;
961
962 return ret;
963}
1b2db9fb
CL		 964
965#ifdef CONFIG_NUMA
966asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages,
9216dfad 967 compat_uptr_t __user *pages32,
1b2db9fb
CL		 968 const int __user *nodes,
969 int __user *status,
970 int flags)
971{
972 const void __user * __user *pages;
973 int i;
974
975 pages = compat_alloc_user_space(nr_pages * sizeof(void *));
976 for (i = 0; i < nr_pages; i++) {
977 compat_uptr_t p;
978
9216dfad 979 if (get_user(p, pages32 + i) ||
1b2db9fb
CL		 980 put_user(compat_ptr(p), pages + i))
981 return -EFAULT;
982 }
983 return sys_move_pages(pid, nr_pages, pages, nodes, status, flags);
984}
3fd59397
SR		 985
986asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
987 compat_ulong_t maxnode,
988 const compat_ulong_t __user *old_nodes,
989 const compat_ulong_t __user *new_nodes)
990{
991 unsigned long __user *old = NULL;
992 unsigned long __user *new = NULL;
993 nodemask_t tmp_mask;
994 unsigned long nr_bits;
995 unsigned long size;
996
997 nr_bits = min_t(unsigned long, maxnode - 1, MAX_NUMNODES);
998 size = ALIGN(nr_bits, BITS_PER_LONG) / 8;
999 if (old_nodes) {
1000 if (compat_get_bitmap(nodes_addr(tmp_mask), old_nodes, nr_bits))
1001 return -EFAULT;
1002 old = compat_alloc_user_space(new_nodes ? size * 2 : size);
1003 if (new_nodes)
1004 new = old + size / sizeof(unsigned long);
1005 if (copy_to_user(old, nodes_addr(tmp_mask), size))
1006 return -EFAULT;
1007 }
1008 if (new_nodes) {
1009 if (compat_get_bitmap(nodes_addr(tmp_mask), new_nodes, nr_bits))
1010 return -EFAULT;
1011 if (new == NULL)
1012 new = compat_alloc_user_space(size);
1013 if (copy_to_user(new, nodes_addr(tmp_mask), size))
1014 return -EFAULT;
1015 }
1016 return sys_migrate_pages(pid, nr_bits + 1, old, new);
1017}
1b2db9fb 1018#endif
d4d23add
KM		 1019
1020struct compat_sysinfo {
1021 s32 uptime;
1022 u32 loads[3];
1023 u32 totalram;
1024 u32 freeram;
1025 u32 sharedram;
1026 u32 bufferram;
1027 u32 totalswap;
1028 u32 freeswap;
1029 u16 procs;
1030 u16 pad;
1031 u32 totalhigh;
1032 u32 freehigh;
1033 u32 mem_unit;
1034 char _f[20-2*sizeof(u32)-sizeof(int)];
1035};
1036
1037asmlinkage long
1038compat_sys_sysinfo(struct compat_sysinfo __user *info)
1039{
1040 struct sysinfo s;
1041
1042 do_sysinfo(&s);
1043
1044 /* Check to see if any memory value is too large for 32-bit and scale
1045 * down if needed
1046 */
1047 if ((s.totalram >> 32) || (s.totalswap >> 32)) {
1048 int bitcount = 0;
1049
1050 while (s.mem_unit < PAGE_SIZE) {
1051 s.mem_unit <<= 1;
1052 bitcount++;
1053 }
1054
1055 s.totalram >>= bitcount;
1056 s.freeram >>= bitcount;
1057 s.sharedram >>= bitcount;
1058 s.bufferram >>= bitcount;
1059 s.totalswap >>= bitcount;
1060 s.freeswap >>= bitcount;
1061 s.totalhigh >>= bitcount;
1062 s.freehigh >>= bitcount;
1063 }
1064
1065 if (!access_ok(VERIFY_WRITE, info, sizeof(struct compat_sysinfo)) ||
1066 __put_user (s.uptime, &info->uptime) ||
1067 __put_user (s.loads[0], &info->loads[0]) ||
1068 __put_user (s.loads[1], &info->loads[1]) ||
1069 __put_user (s.loads[2], &info->loads[2]) ||
1070 __put_user (s.totalram, &info->totalram) ||
1071 __put_user (s.freeram, &info->freeram) ||
1072 __put_user (s.sharedram, &info->sharedram) ||
1073 __put_user (s.bufferram, &info->bufferram) ||
1074 __put_user (s.totalswap, &info->totalswap) ||
1075 __put_user (s.freeswap, &info->freeswap) ||
1076 __put_user (s.procs, &info->procs) ||
1077 __put_user (s.totalhigh, &info->totalhigh) ||
1078 __put_user (s.freehigh, &info->freehigh) ||
1079 __put_user (s.mem_unit, &info->mem_unit))
1080 return -EFAULT;
1081
1082 return 0;
1083}
kernel source for telekom puls (alcatel/mediatek)