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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 | |
29 | int 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 | ||
36 | int 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 | ||
43 | static long compat_nanosleep_restart(struct restart_block *restart) | |
44 | { | |
45 | unsigned long expire = restart->arg0, now = jiffies; | |
46 | struct compat_timespec __user *rmtp; | |
47 | ||
48 | /* Did it expire while we handled signals? */ | |
49 | if (!time_after(expire, now)) | |
50 | return 0; | |
51 | ||
75bcc8c5 | 52 | expire = schedule_timeout_interruptible(expire - now); |
1da177e4 LT |
53 | if (expire == 0) |
54 | return 0; | |
55 | ||
56 | rmtp = (struct compat_timespec __user *)restart->arg1; | |
57 | if (rmtp) { | |
58 | struct compat_timespec ct; | |
59 | struct timespec t; | |
60 | ||
61 | jiffies_to_timespec(expire, &t); | |
62 | ct.tv_sec = t.tv_sec; | |
63 | ct.tv_nsec = t.tv_nsec; | |
64 | if (copy_to_user(rmtp, &ct, sizeof(ct))) | |
65 | return -EFAULT; | |
66 | } | |
67 | /* The 'restart' block is already filled in */ | |
68 | return -ERESTART_RESTARTBLOCK; | |
69 | } | |
70 | ||
71 | asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp, | |
72 | struct compat_timespec __user *rmtp) | |
73 | { | |
74 | struct timespec t; | |
75 | struct restart_block *restart; | |
76 | unsigned long expire; | |
77 | ||
78 | if (get_compat_timespec(&t, rqtp)) | |
79 | return -EFAULT; | |
80 | ||
81 | if ((t.tv_nsec >= 1000000000L) || (t.tv_nsec < 0) || (t.tv_sec < 0)) | |
82 | return -EINVAL; | |
83 | ||
84 | expire = timespec_to_jiffies(&t) + (t.tv_sec || t.tv_nsec); | |
75bcc8c5 | 85 | expire = schedule_timeout_interruptible(expire); |
1da177e4 LT |
86 | if (expire == 0) |
87 | return 0; | |
88 | ||
89 | if (rmtp) { | |
90 | jiffies_to_timespec(expire, &t); | |
91 | if (put_compat_timespec(&t, rmtp)) | |
92 | return -EFAULT; | |
93 | } | |
94 | restart = ¤t_thread_info()->restart_block; | |
95 | restart->fn = compat_nanosleep_restart; | |
96 | restart->arg0 = jiffies + expire; | |
97 | restart->arg1 = (unsigned long) rmtp; | |
98 | return -ERESTART_RESTARTBLOCK; | |
99 | } | |
100 | ||
101 | static inline long get_compat_itimerval(struct itimerval *o, | |
102 | struct compat_itimerval __user *i) | |
103 | { | |
104 | return (!access_ok(VERIFY_READ, i, sizeof(*i)) || | |
105 | (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | | |
106 | __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | | |
107 | __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | | |
108 | __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); | |
109 | } | |
110 | ||
111 | static inline long put_compat_itimerval(struct compat_itimerval __user *o, | |
112 | struct itimerval *i) | |
113 | { | |
114 | return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || | |
115 | (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | | |
116 | __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | | |
117 | __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | | |
118 | __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); | |
119 | } | |
120 | ||
121 | asmlinkage long compat_sys_getitimer(int which, | |
122 | struct compat_itimerval __user *it) | |
123 | { | |
124 | struct itimerval kit; | |
125 | int error; | |
126 | ||
127 | error = do_getitimer(which, &kit); | |
128 | if (!error && put_compat_itimerval(it, &kit)) | |
129 | error = -EFAULT; | |
130 | return error; | |
131 | } | |
132 | ||
133 | asmlinkage long compat_sys_setitimer(int which, | |
134 | struct compat_itimerval __user *in, | |
135 | struct compat_itimerval __user *out) | |
136 | { | |
137 | struct itimerval kin, kout; | |
138 | int error; | |
139 | ||
140 | if (in) { | |
141 | if (get_compat_itimerval(&kin, in)) | |
142 | return -EFAULT; | |
143 | } else | |
144 | memset(&kin, 0, sizeof(kin)); | |
145 | ||
146 | error = do_setitimer(which, &kin, out ? &kout : NULL); | |
147 | if (error || !out) | |
148 | return error; | |
149 | if (put_compat_itimerval(out, &kout)) | |
150 | return -EFAULT; | |
151 | return 0; | |
152 | } | |
153 | ||
154 | asmlinkage long compat_sys_times(struct compat_tms __user *tbuf) | |
155 | { | |
156 | /* | |
157 | * In the SMP world we might just be unlucky and have one of | |
158 | * the times increment as we use it. Since the value is an | |
159 | * atomically safe type this is just fine. Conceptually its | |
160 | * as if the syscall took an instant longer to occur. | |
161 | */ | |
162 | if (tbuf) { | |
163 | struct compat_tms tmp; | |
164 | struct task_struct *tsk = current; | |
165 | struct task_struct *t; | |
166 | cputime_t utime, stime, cutime, cstime; | |
167 | ||
168 | read_lock(&tasklist_lock); | |
169 | utime = tsk->signal->utime; | |
170 | stime = tsk->signal->stime; | |
171 | t = tsk; | |
172 | do { | |
173 | utime = cputime_add(utime, t->utime); | |
174 | stime = cputime_add(stime, t->stime); | |
175 | t = next_thread(t); | |
176 | } while (t != tsk); | |
177 | ||
178 | /* | |
179 | * While we have tasklist_lock read-locked, no dying thread | |
180 | * can be updating current->signal->[us]time. Instead, | |
181 | * we got their counts included in the live thread loop. | |
182 | * However, another thread can come in right now and | |
183 | * do a wait call that updates current->signal->c[us]time. | |
184 | * To make sure we always see that pair updated atomically, | |
185 | * we take the siglock around fetching them. | |
186 | */ | |
187 | spin_lock_irq(&tsk->sighand->siglock); | |
188 | cutime = tsk->signal->cutime; | |
189 | cstime = tsk->signal->cstime; | |
190 | spin_unlock_irq(&tsk->sighand->siglock); | |
191 | read_unlock(&tasklist_lock); | |
192 | ||
193 | tmp.tms_utime = compat_jiffies_to_clock_t(cputime_to_jiffies(utime)); | |
194 | tmp.tms_stime = compat_jiffies_to_clock_t(cputime_to_jiffies(stime)); | |
195 | tmp.tms_cutime = compat_jiffies_to_clock_t(cputime_to_jiffies(cutime)); | |
196 | tmp.tms_cstime = compat_jiffies_to_clock_t(cputime_to_jiffies(cstime)); | |
197 | if (copy_to_user(tbuf, &tmp, sizeof(tmp))) | |
198 | return -EFAULT; | |
199 | } | |
200 | return compat_jiffies_to_clock_t(jiffies); | |
201 | } | |
202 | ||
203 | /* | |
204 | * Assumption: old_sigset_t and compat_old_sigset_t are both | |
205 | * types that can be passed to put_user()/get_user(). | |
206 | */ | |
207 | ||
208 | asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set) | |
209 | { | |
210 | old_sigset_t s; | |
211 | long ret; | |
212 | mm_segment_t old_fs = get_fs(); | |
213 | ||
214 | set_fs(KERNEL_DS); | |
215 | ret = sys_sigpending((old_sigset_t __user *) &s); | |
216 | set_fs(old_fs); | |
217 | if (ret == 0) | |
218 | ret = put_user(s, set); | |
219 | return ret; | |
220 | } | |
221 | ||
222 | asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *set, | |
223 | compat_old_sigset_t __user *oset) | |
224 | { | |
225 | old_sigset_t s; | |
226 | long ret; | |
227 | mm_segment_t old_fs; | |
228 | ||
229 | if (set && get_user(s, set)) | |
230 | return -EFAULT; | |
231 | old_fs = get_fs(); | |
232 | set_fs(KERNEL_DS); | |
233 | ret = sys_sigprocmask(how, | |
234 | set ? (old_sigset_t __user *) &s : NULL, | |
235 | oset ? (old_sigset_t __user *) &s : NULL); | |
236 | set_fs(old_fs); | |
237 | if (ret == 0) | |
238 | if (oset) | |
239 | ret = put_user(s, oset); | |
240 | return ret; | |
241 | } | |
242 | ||
1da177e4 LT |
243 | asmlinkage long compat_sys_setrlimit(unsigned int resource, |
244 | struct compat_rlimit __user *rlim) | |
245 | { | |
246 | struct rlimit r; | |
247 | int ret; | |
248 | mm_segment_t old_fs = get_fs (); | |
249 | ||
250 | if (resource >= RLIM_NLIMITS) | |
251 | return -EINVAL; | |
252 | ||
253 | if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) || | |
254 | __get_user(r.rlim_cur, &rlim->rlim_cur) || | |
255 | __get_user(r.rlim_max, &rlim->rlim_max)) | |
256 | return -EFAULT; | |
257 | ||
258 | if (r.rlim_cur == COMPAT_RLIM_INFINITY) | |
259 | r.rlim_cur = RLIM_INFINITY; | |
260 | if (r.rlim_max == COMPAT_RLIM_INFINITY) | |
261 | r.rlim_max = RLIM_INFINITY; | |
262 | set_fs(KERNEL_DS); | |
263 | ret = sys_setrlimit(resource, (struct rlimit __user *) &r); | |
264 | set_fs(old_fs); | |
265 | return ret; | |
266 | } | |
267 | ||
268 | #ifdef COMPAT_RLIM_OLD_INFINITY | |
269 | ||
270 | asmlinkage long compat_sys_old_getrlimit(unsigned int resource, | |
271 | struct compat_rlimit __user *rlim) | |
272 | { | |
273 | struct rlimit r; | |
274 | int ret; | |
275 | mm_segment_t old_fs = get_fs(); | |
276 | ||
277 | set_fs(KERNEL_DS); | |
278 | ret = sys_old_getrlimit(resource, &r); | |
279 | set_fs(old_fs); | |
280 | ||
281 | if (!ret) { | |
282 | if (r.rlim_cur > COMPAT_RLIM_OLD_INFINITY) | |
283 | r.rlim_cur = COMPAT_RLIM_INFINITY; | |
284 | if (r.rlim_max > COMPAT_RLIM_OLD_INFINITY) | |
285 | r.rlim_max = COMPAT_RLIM_INFINITY; | |
286 | ||
287 | if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || | |
288 | __put_user(r.rlim_cur, &rlim->rlim_cur) || | |
289 | __put_user(r.rlim_max, &rlim->rlim_max)) | |
290 | return -EFAULT; | |
291 | } | |
292 | return ret; | |
293 | } | |
294 | ||
295 | #endif | |
296 | ||
297 | asmlinkage long compat_sys_getrlimit (unsigned int resource, | |
298 | struct compat_rlimit __user *rlim) | |
299 | { | |
300 | struct rlimit r; | |
301 | int ret; | |
302 | mm_segment_t old_fs = get_fs(); | |
303 | ||
304 | set_fs(KERNEL_DS); | |
305 | ret = sys_getrlimit(resource, (struct rlimit __user *) &r); | |
306 | set_fs(old_fs); | |
307 | if (!ret) { | |
308 | if (r.rlim_cur > COMPAT_RLIM_INFINITY) | |
309 | r.rlim_cur = COMPAT_RLIM_INFINITY; | |
310 | if (r.rlim_max > COMPAT_RLIM_INFINITY) | |
311 | r.rlim_max = COMPAT_RLIM_INFINITY; | |
312 | ||
313 | if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || | |
314 | __put_user(r.rlim_cur, &rlim->rlim_cur) || | |
315 | __put_user(r.rlim_max, &rlim->rlim_max)) | |
316 | return -EFAULT; | |
317 | } | |
318 | return ret; | |
319 | } | |
320 | ||
321 | int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru) | |
322 | { | |
323 | if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)) || | |
324 | __put_user(r->ru_utime.tv_sec, &ru->ru_utime.tv_sec) || | |
325 | __put_user(r->ru_utime.tv_usec, &ru->ru_utime.tv_usec) || | |
326 | __put_user(r->ru_stime.tv_sec, &ru->ru_stime.tv_sec) || | |
327 | __put_user(r->ru_stime.tv_usec, &ru->ru_stime.tv_usec) || | |
328 | __put_user(r->ru_maxrss, &ru->ru_maxrss) || | |
329 | __put_user(r->ru_ixrss, &ru->ru_ixrss) || | |
330 | __put_user(r->ru_idrss, &ru->ru_idrss) || | |
331 | __put_user(r->ru_isrss, &ru->ru_isrss) || | |
332 | __put_user(r->ru_minflt, &ru->ru_minflt) || | |
333 | __put_user(r->ru_majflt, &ru->ru_majflt) || | |
334 | __put_user(r->ru_nswap, &ru->ru_nswap) || | |
335 | __put_user(r->ru_inblock, &ru->ru_inblock) || | |
336 | __put_user(r->ru_oublock, &ru->ru_oublock) || | |
337 | __put_user(r->ru_msgsnd, &ru->ru_msgsnd) || | |
338 | __put_user(r->ru_msgrcv, &ru->ru_msgrcv) || | |
339 | __put_user(r->ru_nsignals, &ru->ru_nsignals) || | |
340 | __put_user(r->ru_nvcsw, &ru->ru_nvcsw) || | |
341 | __put_user(r->ru_nivcsw, &ru->ru_nivcsw)) | |
342 | return -EFAULT; | |
343 | return 0; | |
344 | } | |
345 | ||
346 | asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru) | |
347 | { | |
348 | struct rusage r; | |
349 | int ret; | |
350 | mm_segment_t old_fs = get_fs(); | |
351 | ||
352 | set_fs(KERNEL_DS); | |
353 | ret = sys_getrusage(who, (struct rusage __user *) &r); | |
354 | set_fs(old_fs); | |
355 | ||
356 | if (ret) | |
357 | return ret; | |
358 | ||
359 | if (put_compat_rusage(&r, ru)) | |
360 | return -EFAULT; | |
361 | ||
362 | return 0; | |
363 | } | |
364 | ||
365 | asmlinkage long | |
366 | compat_sys_wait4(compat_pid_t pid, compat_uint_t __user *stat_addr, int options, | |
367 | struct compat_rusage __user *ru) | |
368 | { | |
369 | if (!ru) { | |
370 | return sys_wait4(pid, stat_addr, options, NULL); | |
371 | } else { | |
372 | struct rusage r; | |
373 | int ret; | |
374 | unsigned int status; | |
375 | mm_segment_t old_fs = get_fs(); | |
376 | ||
377 | set_fs (KERNEL_DS); | |
378 | ret = sys_wait4(pid, | |
379 | (stat_addr ? | |
380 | (unsigned int __user *) &status : NULL), | |
381 | options, (struct rusage __user *) &r); | |
382 | set_fs (old_fs); | |
383 | ||
384 | if (ret > 0) { | |
385 | if (put_compat_rusage(&r, ru)) | |
386 | return -EFAULT; | |
387 | if (stat_addr && put_user(status, stat_addr)) | |
388 | return -EFAULT; | |
389 | } | |
390 | return ret; | |
391 | } | |
392 | } | |
393 | ||
394 | asmlinkage long compat_sys_waitid(int which, compat_pid_t pid, | |
395 | struct compat_siginfo __user *uinfo, int options, | |
396 | struct compat_rusage __user *uru) | |
397 | { | |
398 | siginfo_t info; | |
399 | struct rusage ru; | |
400 | long ret; | |
401 | mm_segment_t old_fs = get_fs(); | |
402 | ||
403 | memset(&info, 0, sizeof(info)); | |
404 | ||
405 | set_fs(KERNEL_DS); | |
406 | ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options, | |
407 | uru ? (struct rusage __user *)&ru : NULL); | |
408 | set_fs(old_fs); | |
409 | ||
410 | if ((ret < 0) || (info.si_signo == 0)) | |
411 | return ret; | |
412 | ||
413 | if (uru) { | |
414 | ret = put_compat_rusage(&ru, uru); | |
415 | if (ret) | |
416 | return ret; | |
417 | } | |
418 | ||
419 | BUG_ON(info.si_code & __SI_MASK); | |
420 | info.si_code |= __SI_CHLD; | |
421 | return copy_siginfo_to_user32(uinfo, &info); | |
422 | } | |
423 | ||
424 | static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr, | |
425 | unsigned len, cpumask_t *new_mask) | |
426 | { | |
427 | unsigned long *k; | |
428 | ||
429 | if (len < sizeof(cpumask_t)) | |
430 | memset(new_mask, 0, sizeof(cpumask_t)); | |
431 | else if (len > sizeof(cpumask_t)) | |
432 | len = sizeof(cpumask_t); | |
433 | ||
434 | k = cpus_addr(*new_mask); | |
435 | return compat_get_bitmap(k, user_mask_ptr, len * 8); | |
436 | } | |
437 | ||
438 | asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, | |
439 | unsigned int len, | |
440 | compat_ulong_t __user *user_mask_ptr) | |
441 | { | |
442 | cpumask_t new_mask; | |
443 | int retval; | |
444 | ||
445 | retval = compat_get_user_cpu_mask(user_mask_ptr, len, &new_mask); | |
446 | if (retval) | |
447 | return retval; | |
448 | ||
449 | return sched_setaffinity(pid, new_mask); | |
450 | } | |
451 | ||
452 | asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len, | |
453 | compat_ulong_t __user *user_mask_ptr) | |
454 | { | |
455 | int ret; | |
456 | cpumask_t mask; | |
457 | unsigned long *k; | |
458 | unsigned int min_length = sizeof(cpumask_t); | |
459 | ||
460 | if (NR_CPUS <= BITS_PER_COMPAT_LONG) | |
461 | min_length = sizeof(compat_ulong_t); | |
462 | ||
463 | if (len < min_length) | |
464 | return -EINVAL; | |
465 | ||
466 | ret = sched_getaffinity(pid, &mask); | |
467 | if (ret < 0) | |
468 | return ret; | |
469 | ||
470 | k = cpus_addr(mask); | |
471 | ret = compat_put_bitmap(user_mask_ptr, k, min_length * 8); | |
472 | if (ret) | |
473 | return ret; | |
474 | ||
475 | return min_length; | |
476 | } | |
477 | ||
83f5d126 DL |
478 | int get_compat_itimerspec(struct itimerspec *dst, |
479 | const struct compat_itimerspec __user *src) | |
1da177e4 LT |
480 | { |
481 | if (get_compat_timespec(&dst->it_interval, &src->it_interval) || | |
482 | get_compat_timespec(&dst->it_value, &src->it_value)) | |
483 | return -EFAULT; | |
484 | return 0; | |
485 | } | |
486 | ||
83f5d126 DL |
487 | int put_compat_itimerspec(struct compat_itimerspec __user *dst, |
488 | const struct itimerspec *src) | |
1da177e4 LT |
489 | { |
490 | if (put_compat_timespec(&src->it_interval, &dst->it_interval) || | |
491 | put_compat_timespec(&src->it_value, &dst->it_value)) | |
492 | return -EFAULT; | |
493 | return 0; | |
494 | } | |
495 | ||
3a0f69d5 CH |
496 | long compat_sys_timer_create(clockid_t which_clock, |
497 | struct compat_sigevent __user *timer_event_spec, | |
498 | timer_t __user *created_timer_id) | |
499 | { | |
500 | struct sigevent __user *event = NULL; | |
501 | ||
502 | if (timer_event_spec) { | |
503 | struct sigevent kevent; | |
504 | ||
505 | event = compat_alloc_user_space(sizeof(*event)); | |
506 | if (get_compat_sigevent(&kevent, timer_event_spec) || | |
507 | copy_to_user(event, &kevent, sizeof(*event))) | |
508 | return -EFAULT; | |
509 | } | |
510 | ||
511 | return sys_timer_create(which_clock, event, created_timer_id); | |
512 | } | |
513 | ||
1da177e4 LT |
514 | long compat_sys_timer_settime(timer_t timer_id, int flags, |
515 | struct compat_itimerspec __user *new, | |
516 | struct compat_itimerspec __user *old) | |
517 | { | |
518 | long err; | |
519 | mm_segment_t oldfs; | |
520 | struct itimerspec newts, oldts; | |
521 | ||
522 | if (!new) | |
523 | return -EINVAL; | |
524 | if (get_compat_itimerspec(&newts, new)) | |
525 | return -EFAULT; | |
526 | oldfs = get_fs(); | |
527 | set_fs(KERNEL_DS); | |
528 | err = sys_timer_settime(timer_id, flags, | |
529 | (struct itimerspec __user *) &newts, | |
530 | (struct itimerspec __user *) &oldts); | |
531 | set_fs(oldfs); | |
532 | if (!err && old && put_compat_itimerspec(old, &oldts)) | |
533 | return -EFAULT; | |
534 | return err; | |
535 | } | |
536 | ||
537 | long compat_sys_timer_gettime(timer_t timer_id, | |
538 | struct compat_itimerspec __user *setting) | |
539 | { | |
540 | long err; | |
541 | mm_segment_t oldfs; | |
542 | struct itimerspec ts; | |
543 | ||
544 | oldfs = get_fs(); | |
545 | set_fs(KERNEL_DS); | |
546 | err = sys_timer_gettime(timer_id, | |
547 | (struct itimerspec __user *) &ts); | |
548 | set_fs(oldfs); | |
549 | if (!err && put_compat_itimerspec(setting, &ts)) | |
550 | return -EFAULT; | |
551 | return err; | |
552 | } | |
553 | ||
554 | long compat_sys_clock_settime(clockid_t which_clock, | |
555 | struct compat_timespec __user *tp) | |
556 | { | |
557 | long err; | |
558 | mm_segment_t oldfs; | |
559 | struct timespec ts; | |
560 | ||
561 | if (get_compat_timespec(&ts, tp)) | |
562 | return -EFAULT; | |
563 | oldfs = get_fs(); | |
564 | set_fs(KERNEL_DS); | |
565 | err = sys_clock_settime(which_clock, | |
566 | (struct timespec __user *) &ts); | |
567 | set_fs(oldfs); | |
568 | return err; | |
569 | } | |
570 | ||
571 | long compat_sys_clock_gettime(clockid_t which_clock, | |
572 | struct compat_timespec __user *tp) | |
573 | { | |
574 | long err; | |
575 | mm_segment_t oldfs; | |
576 | struct timespec ts; | |
577 | ||
578 | oldfs = get_fs(); | |
579 | set_fs(KERNEL_DS); | |
580 | err = sys_clock_gettime(which_clock, | |
581 | (struct timespec __user *) &ts); | |
582 | set_fs(oldfs); | |
583 | if (!err && put_compat_timespec(&ts, tp)) | |
584 | return -EFAULT; | |
585 | return err; | |
586 | } | |
587 | ||
588 | long compat_sys_clock_getres(clockid_t which_clock, | |
589 | struct compat_timespec __user *tp) | |
590 | { | |
591 | long err; | |
592 | mm_segment_t oldfs; | |
593 | struct timespec ts; | |
594 | ||
595 | oldfs = get_fs(); | |
596 | set_fs(KERNEL_DS); | |
597 | err = sys_clock_getres(which_clock, | |
598 | (struct timespec __user *) &ts); | |
599 | set_fs(oldfs); | |
600 | if (!err && tp && put_compat_timespec(&ts, tp)) | |
601 | return -EFAULT; | |
602 | return err; | |
603 | } | |
604 | ||
1711ef38 TA |
605 | static long compat_clock_nanosleep_restart(struct restart_block *restart) |
606 | { | |
607 | long err; | |
608 | mm_segment_t oldfs; | |
609 | struct timespec tu; | |
610 | struct compat_timespec *rmtp = (struct compat_timespec *)(restart->arg1); | |
611 | ||
612 | restart->arg1 = (unsigned long) &tu; | |
613 | oldfs = get_fs(); | |
614 | set_fs(KERNEL_DS); | |
615 | err = clock_nanosleep_restart(restart); | |
616 | set_fs(oldfs); | |
617 | ||
618 | if ((err == -ERESTART_RESTARTBLOCK) && rmtp && | |
619 | put_compat_timespec(&tu, rmtp)) | |
620 | return -EFAULT; | |
621 | ||
622 | if (err == -ERESTART_RESTARTBLOCK) { | |
623 | restart->fn = compat_clock_nanosleep_restart; | |
624 | restart->arg1 = (unsigned long) rmtp; | |
625 | } | |
626 | return err; | |
627 | } | |
628 | ||
1da177e4 LT |
629 | long compat_sys_clock_nanosleep(clockid_t which_clock, int flags, |
630 | struct compat_timespec __user *rqtp, | |
631 | struct compat_timespec __user *rmtp) | |
632 | { | |
633 | long err; | |
634 | mm_segment_t oldfs; | |
635 | struct timespec in, out; | |
1711ef38 | 636 | struct restart_block *restart; |
1da177e4 LT |
637 | |
638 | if (get_compat_timespec(&in, rqtp)) | |
639 | return -EFAULT; | |
640 | ||
641 | oldfs = get_fs(); | |
642 | set_fs(KERNEL_DS); | |
643 | err = sys_clock_nanosleep(which_clock, flags, | |
644 | (struct timespec __user *) &in, | |
645 | (struct timespec __user *) &out); | |
646 | set_fs(oldfs); | |
1711ef38 | 647 | |
1da177e4 LT |
648 | if ((err == -ERESTART_RESTARTBLOCK) && rmtp && |
649 | put_compat_timespec(&out, rmtp)) | |
650 | return -EFAULT; | |
1711ef38 TA |
651 | |
652 | if (err == -ERESTART_RESTARTBLOCK) { | |
653 | restart = ¤t_thread_info()->restart_block; | |
654 | restart->fn = compat_clock_nanosleep_restart; | |
655 | restart->arg1 = (unsigned long) rmtp; | |
656 | } | |
1da177e4 LT |
657 | return err; |
658 | } | |
659 | ||
660 | /* | |
661 | * We currently only need the following fields from the sigevent | |
662 | * structure: sigev_value, sigev_signo, sig_notify and (sometimes | |
663 | * sigev_notify_thread_id). The others are handled in user mode. | |
664 | * We also assume that copying sigev_value.sival_int is sufficient | |
665 | * to keep all the bits of sigev_value.sival_ptr intact. | |
666 | */ | |
667 | int get_compat_sigevent(struct sigevent *event, | |
668 | const struct compat_sigevent __user *u_event) | |
669 | { | |
51410d3c | 670 | memset(event, 0, sizeof(*event)); |
1da177e4 LT |
671 | return (!access_ok(VERIFY_READ, u_event, sizeof(*u_event)) || |
672 | __get_user(event->sigev_value.sival_int, | |
673 | &u_event->sigev_value.sival_int) || | |
674 | __get_user(event->sigev_signo, &u_event->sigev_signo) || | |
675 | __get_user(event->sigev_notify, &u_event->sigev_notify) || | |
676 | __get_user(event->sigev_notify_thread_id, | |
677 | &u_event->sigev_notify_thread_id)) | |
678 | ? -EFAULT : 0; | |
679 | } | |
680 | ||
5fa3839a | 681 | long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, |
1da177e4 LT |
682 | unsigned long bitmap_size) |
683 | { | |
684 | int i, j; | |
685 | unsigned long m; | |
686 | compat_ulong_t um; | |
687 | unsigned long nr_compat_longs; | |
688 | ||
689 | /* align bitmap up to nearest compat_long_t boundary */ | |
690 | bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); | |
691 | ||
692 | if (!access_ok(VERIFY_READ, umask, bitmap_size / 8)) | |
693 | return -EFAULT; | |
694 | ||
695 | nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); | |
696 | ||
697 | for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { | |
698 | m = 0; | |
699 | ||
700 | for (j = 0; j < sizeof(m)/sizeof(um); j++) { | |
701 | /* | |
702 | * We dont want to read past the end of the userspace | |
703 | * bitmap. We must however ensure the end of the | |
704 | * kernel bitmap is zeroed. | |
705 | */ | |
706 | if (nr_compat_longs-- > 0) { | |
707 | if (__get_user(um, umask)) | |
708 | return -EFAULT; | |
709 | } else { | |
710 | um = 0; | |
711 | } | |
712 | ||
713 | umask++; | |
714 | m |= (long)um << (j * BITS_PER_COMPAT_LONG); | |
715 | } | |
716 | *mask++ = m; | |
717 | } | |
718 | ||
719 | return 0; | |
720 | } | |
721 | ||
722 | long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, | |
723 | unsigned long bitmap_size) | |
724 | { | |
725 | int i, j; | |
726 | unsigned long m; | |
727 | compat_ulong_t um; | |
728 | unsigned long nr_compat_longs; | |
729 | ||
730 | /* align bitmap up to nearest compat_long_t boundary */ | |
731 | bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); | |
732 | ||
733 | if (!access_ok(VERIFY_WRITE, umask, bitmap_size / 8)) | |
734 | return -EFAULT; | |
735 | ||
736 | nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); | |
737 | ||
738 | for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { | |
739 | m = *mask++; | |
740 | ||
741 | for (j = 0; j < sizeof(m)/sizeof(um); j++) { | |
742 | um = m; | |
743 | ||
744 | /* | |
745 | * We dont want to write past the end of the userspace | |
746 | * bitmap. | |
747 | */ | |
748 | if (nr_compat_longs-- > 0) { | |
749 | if (__put_user(um, umask)) | |
750 | return -EFAULT; | |
751 | } | |
752 | ||
753 | umask++; | |
754 | m >>= 4*sizeof(um); | |
755 | m >>= 4*sizeof(um); | |
756 | } | |
757 | } | |
758 | ||
759 | return 0; | |
760 | } | |
761 | ||
762 | void | |
763 | sigset_from_compat (sigset_t *set, compat_sigset_t *compat) | |
764 | { | |
765 | switch (_NSIG_WORDS) { | |
1da177e4 LT |
766 | case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 ); |
767 | case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 ); | |
768 | case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 ); | |
769 | case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 ); | |
1da177e4 LT |
770 | } |
771 | } | |
772 | ||
773 | asmlinkage long | |
774 | compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese, | |
775 | struct compat_siginfo __user *uinfo, | |
776 | struct compat_timespec __user *uts, compat_size_t sigsetsize) | |
777 | { | |
778 | compat_sigset_t s32; | |
779 | sigset_t s; | |
780 | int sig; | |
781 | struct timespec t; | |
782 | siginfo_t info; | |
783 | long ret, timeout = 0; | |
784 | ||
785 | if (sigsetsize != sizeof(sigset_t)) | |
786 | return -EINVAL; | |
787 | ||
788 | if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t))) | |
789 | return -EFAULT; | |
790 | sigset_from_compat(&s, &s32); | |
791 | sigdelsetmask(&s,sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
792 | signotset(&s); | |
793 | ||
794 | if (uts) { | |
795 | if (get_compat_timespec (&t, uts)) | |
796 | return -EFAULT; | |
797 | if (t.tv_nsec >= 1000000000L || t.tv_nsec < 0 | |
798 | || t.tv_sec < 0) | |
799 | return -EINVAL; | |
800 | } | |
801 | ||
802 | spin_lock_irq(¤t->sighand->siglock); | |
803 | sig = dequeue_signal(current, &s, &info); | |
804 | if (!sig) { | |
805 | timeout = MAX_SCHEDULE_TIMEOUT; | |
806 | if (uts) | |
807 | timeout = timespec_to_jiffies(&t) | |
808 | +(t.tv_sec || t.tv_nsec); | |
809 | if (timeout) { | |
810 | current->real_blocked = current->blocked; | |
811 | sigandsets(¤t->blocked, ¤t->blocked, &s); | |
812 | ||
813 | recalc_sigpending(); | |
814 | spin_unlock_irq(¤t->sighand->siglock); | |
815 | ||
75bcc8c5 | 816 | timeout = schedule_timeout_interruptible(timeout); |
1da177e4 LT |
817 | |
818 | spin_lock_irq(¤t->sighand->siglock); | |
819 | sig = dequeue_signal(current, &s, &info); | |
820 | current->blocked = current->real_blocked; | |
821 | siginitset(¤t->real_blocked, 0); | |
822 | recalc_sigpending(); | |
823 | } | |
824 | } | |
825 | spin_unlock_irq(¤t->sighand->siglock); | |
826 | ||
827 | if (sig) { | |
828 | ret = sig; | |
829 | if (uinfo) { | |
830 | if (copy_siginfo_to_user32(uinfo, &info)) | |
831 | ret = -EFAULT; | |
832 | } | |
833 | }else { | |
834 | ret = timeout?-EINTR:-EAGAIN; | |
835 | } | |
836 | return ret; | |
837 | ||
838 | } | |
839 | ||
840 | #ifdef __ARCH_WANT_COMPAT_SYS_TIME | |
841 | ||
842 | /* compat_time_t is a 32 bit "long" and needs to get converted. */ | |
843 | ||
844 | asmlinkage long compat_sys_time(compat_time_t __user * tloc) | |
845 | { | |
846 | compat_time_t i; | |
847 | struct timeval tv; | |
848 | ||
849 | do_gettimeofday(&tv); | |
850 | i = tv.tv_sec; | |
851 | ||
852 | if (tloc) { | |
853 | if (put_user(i,tloc)) | |
854 | i = -EFAULT; | |
855 | } | |
856 | return i; | |
857 | } | |
858 | ||
859 | asmlinkage long compat_sys_stime(compat_time_t __user *tptr) | |
860 | { | |
861 | struct timespec tv; | |
862 | int err; | |
863 | ||
864 | if (get_user(tv.tv_sec, tptr)) | |
865 | return -EFAULT; | |
866 | ||
867 | tv.tv_nsec = 0; | |
868 | ||
869 | err = security_settime(&tv, NULL); | |
870 | if (err) | |
871 | return err; | |
872 | ||
873 | do_settimeofday(&tv); | |
874 | return 0; | |
875 | } | |
876 | ||
877 | #endif /* __ARCH_WANT_COMPAT_SYS_TIME */ | |
150256d8 DW |
878 | |
879 | #ifdef __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND | |
880 | asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize) | |
881 | { | |
882 | sigset_t newset; | |
883 | compat_sigset_t newset32; | |
884 | ||
885 | /* XXX: Don't preclude handling different sized sigset_t's. */ | |
886 | if (sigsetsize != sizeof(sigset_t)) | |
887 | return -EINVAL; | |
888 | ||
889 | if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t))) | |
890 | return -EFAULT; | |
891 | sigset_from_compat(&newset, &newset32); | |
892 | sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
893 | ||
894 | spin_lock_irq(¤t->sighand->siglock); | |
895 | current->saved_sigmask = current->blocked; | |
896 | current->blocked = newset; | |
897 | recalc_sigpending(); | |
898 | spin_unlock_irq(¤t->sighand->siglock); | |
899 | ||
900 | current->state = TASK_INTERRUPTIBLE; | |
901 | schedule(); | |
902 | set_thread_flag(TIF_RESTORE_SIGMASK); | |
903 | return -ERESTARTNOHAND; | |
904 | } | |
905 | #endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */ | |
3158e941 SR |
906 | |
907 | asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp) | |
908 | { | |
909 | struct timex txc; | |
910 | int ret; | |
911 | ||
912 | memset(&txc, 0, sizeof(struct timex)); | |
913 | ||
914 | if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) || | |
915 | __get_user(txc.modes, &utp->modes) || | |
916 | __get_user(txc.offset, &utp->offset) || | |
917 | __get_user(txc.freq, &utp->freq) || | |
918 | __get_user(txc.maxerror, &utp->maxerror) || | |
919 | __get_user(txc.esterror, &utp->esterror) || | |
920 | __get_user(txc.status, &utp->status) || | |
921 | __get_user(txc.constant, &utp->constant) || | |
922 | __get_user(txc.precision, &utp->precision) || | |
923 | __get_user(txc.tolerance, &utp->tolerance) || | |
924 | __get_user(txc.time.tv_sec, &utp->time.tv_sec) || | |
925 | __get_user(txc.time.tv_usec, &utp->time.tv_usec) || | |
926 | __get_user(txc.tick, &utp->tick) || | |
927 | __get_user(txc.ppsfreq, &utp->ppsfreq) || | |
928 | __get_user(txc.jitter, &utp->jitter) || | |
929 | __get_user(txc.shift, &utp->shift) || | |
930 | __get_user(txc.stabil, &utp->stabil) || | |
931 | __get_user(txc.jitcnt, &utp->jitcnt) || | |
932 | __get_user(txc.calcnt, &utp->calcnt) || | |
933 | __get_user(txc.errcnt, &utp->errcnt) || | |
934 | __get_user(txc.stbcnt, &utp->stbcnt)) | |
935 | return -EFAULT; | |
936 | ||
937 | ret = do_adjtimex(&txc); | |
938 | ||
939 | if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) || | |
940 | __put_user(txc.modes, &utp->modes) || | |
941 | __put_user(txc.offset, &utp->offset) || | |
942 | __put_user(txc.freq, &utp->freq) || | |
943 | __put_user(txc.maxerror, &utp->maxerror) || | |
944 | __put_user(txc.esterror, &utp->esterror) || | |
945 | __put_user(txc.status, &utp->status) || | |
946 | __put_user(txc.constant, &utp->constant) || | |
947 | __put_user(txc.precision, &utp->precision) || | |
948 | __put_user(txc.tolerance, &utp->tolerance) || | |
949 | __put_user(txc.time.tv_sec, &utp->time.tv_sec) || | |
950 | __put_user(txc.time.tv_usec, &utp->time.tv_usec) || | |
951 | __put_user(txc.tick, &utp->tick) || | |
952 | __put_user(txc.ppsfreq, &utp->ppsfreq) || | |
953 | __put_user(txc.jitter, &utp->jitter) || | |
954 | __put_user(txc.shift, &utp->shift) || | |
955 | __put_user(txc.stabil, &utp->stabil) || | |
956 | __put_user(txc.jitcnt, &utp->jitcnt) || | |
957 | __put_user(txc.calcnt, &utp->calcnt) || | |
958 | __put_user(txc.errcnt, &utp->errcnt) || | |
959 | __put_user(txc.stbcnt, &utp->stbcnt)) | |
960 | ret = -EFAULT; | |
961 | ||
962 | return ret; | |
963 | } | |
1b2db9fb CL |
964 | |
965 | #ifdef CONFIG_NUMA | |
966 | asmlinkage 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 | |
986 | asmlinkage 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 | |
1020 | struct 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 | ||
1037 | asmlinkage long | |
1038 | compat_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 | } | |
1084 |