Commit | Line | Data |
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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> |
f06febc9 | 26 | #include <linux/times.h> |
e3d5a27d | 27 | #include <linux/ptrace.h> |
5a0e3ad6 | 28 | #include <linux/gfp.h> |
1da177e4 LT |
29 | |
30 | #include <asm/uaccess.h> | |
1da177e4 | 31 | |
b418da16 CH |
32 | /* |
33 | * Note that the native side is already converted to a timespec, because | |
34 | * that's what we want anyway. | |
35 | */ | |
36 | static int compat_get_timeval(struct timespec *o, | |
37 | struct compat_timeval __user *i) | |
38 | { | |
39 | long usec; | |
40 | ||
41 | if (get_user(o->tv_sec, &i->tv_sec) || | |
42 | get_user(usec, &i->tv_usec)) | |
43 | return -EFAULT; | |
44 | o->tv_nsec = usec * 1000; | |
45 | return 0; | |
46 | } | |
47 | ||
48 | static int compat_put_timeval(struct compat_timeval __user *o, | |
49 | struct timeval *i) | |
50 | { | |
51 | return (put_user(i->tv_sec, &o->tv_sec) || | |
52 | put_user(i->tv_usec, &o->tv_usec)) ? -EFAULT : 0; | |
53 | } | |
54 | ||
65f5d80b RC |
55 | static int compat_get_timex(struct timex *txc, struct compat_timex __user *utp) |
56 | { | |
57 | memset(txc, 0, sizeof(struct timex)); | |
58 | ||
59 | if (!access_ok(VERIFY_READ, utp, sizeof(struct compat_timex)) || | |
60 | __get_user(txc->modes, &utp->modes) || | |
61 | __get_user(txc->offset, &utp->offset) || | |
62 | __get_user(txc->freq, &utp->freq) || | |
63 | __get_user(txc->maxerror, &utp->maxerror) || | |
64 | __get_user(txc->esterror, &utp->esterror) || | |
65 | __get_user(txc->status, &utp->status) || | |
66 | __get_user(txc->constant, &utp->constant) || | |
67 | __get_user(txc->precision, &utp->precision) || | |
68 | __get_user(txc->tolerance, &utp->tolerance) || | |
69 | __get_user(txc->time.tv_sec, &utp->time.tv_sec) || | |
70 | __get_user(txc->time.tv_usec, &utp->time.tv_usec) || | |
71 | __get_user(txc->tick, &utp->tick) || | |
72 | __get_user(txc->ppsfreq, &utp->ppsfreq) || | |
73 | __get_user(txc->jitter, &utp->jitter) || | |
74 | __get_user(txc->shift, &utp->shift) || | |
75 | __get_user(txc->stabil, &utp->stabil) || | |
76 | __get_user(txc->jitcnt, &utp->jitcnt) || | |
77 | __get_user(txc->calcnt, &utp->calcnt) || | |
78 | __get_user(txc->errcnt, &utp->errcnt) || | |
79 | __get_user(txc->stbcnt, &utp->stbcnt)) | |
80 | return -EFAULT; | |
81 | ||
82 | return 0; | |
83 | } | |
84 | ||
85 | static int compat_put_timex(struct compat_timex __user *utp, struct timex *txc) | |
86 | { | |
87 | if (!access_ok(VERIFY_WRITE, utp, sizeof(struct compat_timex)) || | |
88 | __put_user(txc->modes, &utp->modes) || | |
89 | __put_user(txc->offset, &utp->offset) || | |
90 | __put_user(txc->freq, &utp->freq) || | |
91 | __put_user(txc->maxerror, &utp->maxerror) || | |
92 | __put_user(txc->esterror, &utp->esterror) || | |
93 | __put_user(txc->status, &utp->status) || | |
94 | __put_user(txc->constant, &utp->constant) || | |
95 | __put_user(txc->precision, &utp->precision) || | |
96 | __put_user(txc->tolerance, &utp->tolerance) || | |
97 | __put_user(txc->time.tv_sec, &utp->time.tv_sec) || | |
98 | __put_user(txc->time.tv_usec, &utp->time.tv_usec) || | |
99 | __put_user(txc->tick, &utp->tick) || | |
100 | __put_user(txc->ppsfreq, &utp->ppsfreq) || | |
101 | __put_user(txc->jitter, &utp->jitter) || | |
102 | __put_user(txc->shift, &utp->shift) || | |
103 | __put_user(txc->stabil, &utp->stabil) || | |
104 | __put_user(txc->jitcnt, &utp->jitcnt) || | |
105 | __put_user(txc->calcnt, &utp->calcnt) || | |
106 | __put_user(txc->errcnt, &utp->errcnt) || | |
107 | __put_user(txc->stbcnt, &utp->stbcnt) || | |
108 | __put_user(txc->tai, &utp->tai)) | |
109 | return -EFAULT; | |
110 | return 0; | |
111 | } | |
112 | ||
b418da16 CH |
113 | asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, |
114 | struct timezone __user *tz) | |
115 | { | |
116 | if (tv) { | |
117 | struct timeval ktv; | |
118 | do_gettimeofday(&ktv); | |
119 | if (compat_put_timeval(tv, &ktv)) | |
120 | return -EFAULT; | |
121 | } | |
122 | if (tz) { | |
123 | if (copy_to_user(tz, &sys_tz, sizeof(sys_tz))) | |
124 | return -EFAULT; | |
125 | } | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, | |
131 | struct timezone __user *tz) | |
132 | { | |
133 | struct timespec kts; | |
134 | struct timezone ktz; | |
135 | ||
136 | if (tv) { | |
137 | if (compat_get_timeval(&kts, tv)) | |
138 | return -EFAULT; | |
139 | } | |
140 | if (tz) { | |
141 | if (copy_from_user(&ktz, tz, sizeof(ktz))) | |
142 | return -EFAULT; | |
143 | } | |
144 | ||
145 | return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL); | |
146 | } | |
147 | ||
1da177e4 LT |
148 | int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts) |
149 | { | |
150 | return (!access_ok(VERIFY_READ, cts, sizeof(*cts)) || | |
151 | __get_user(ts->tv_sec, &cts->tv_sec) || | |
152 | __get_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; | |
153 | } | |
154 | ||
155 | int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user *cts) | |
156 | { | |
157 | return (!access_ok(VERIFY_WRITE, cts, sizeof(*cts)) || | |
158 | __put_user(ts->tv_sec, &cts->tv_sec) || | |
159 | __put_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0; | |
160 | } | |
161 | ||
41652937 ON |
162 | static long compat_nanosleep_restart(struct restart_block *restart) |
163 | { | |
164 | struct compat_timespec __user *rmtp; | |
165 | struct timespec rmt; | |
166 | mm_segment_t oldfs; | |
167 | long ret; | |
168 | ||
029a07e0 | 169 | restart->nanosleep.rmtp = (struct timespec __user *) &rmt; |
41652937 ON |
170 | oldfs = get_fs(); |
171 | set_fs(KERNEL_DS); | |
172 | ret = hrtimer_nanosleep_restart(restart); | |
173 | set_fs(oldfs); | |
174 | ||
175 | if (ret) { | |
029a07e0 | 176 | rmtp = restart->nanosleep.compat_rmtp; |
41652937 ON |
177 | |
178 | if (rmtp && put_compat_timespec(&rmt, rmtp)) | |
179 | return -EFAULT; | |
180 | } | |
181 | ||
182 | return ret; | |
183 | } | |
184 | ||
1da177e4 | 185 | asmlinkage long compat_sys_nanosleep(struct compat_timespec __user *rqtp, |
c70878b4 | 186 | struct compat_timespec __user *rmtp) |
1da177e4 | 187 | { |
c70878b4 | 188 | struct timespec tu, rmt; |
41652937 | 189 | mm_segment_t oldfs; |
c70878b4 | 190 | long ret; |
1da177e4 | 191 | |
c70878b4 | 192 | if (get_compat_timespec(&tu, rqtp)) |
1da177e4 LT |
193 | return -EFAULT; |
194 | ||
c70878b4 | 195 | if (!timespec_valid(&tu)) |
1da177e4 LT |
196 | return -EINVAL; |
197 | ||
41652937 ON |
198 | oldfs = get_fs(); |
199 | set_fs(KERNEL_DS); | |
200 | ret = hrtimer_nanosleep(&tu, | |
201 | rmtp ? (struct timespec __user *)&rmt : NULL, | |
202 | HRTIMER_MODE_REL, CLOCK_MONOTONIC); | |
203 | set_fs(oldfs); | |
204 | ||
205 | if (ret) { | |
206 | struct restart_block *restart | |
207 | = ¤t_thread_info()->restart_block; | |
208 | ||
209 | restart->fn = compat_nanosleep_restart; | |
029a07e0 | 210 | restart->nanosleep.compat_rmtp = rmtp; |
1da177e4 | 211 | |
41652937 | 212 | if (rmtp && put_compat_timespec(&rmt, rmtp)) |
1da177e4 LT |
213 | return -EFAULT; |
214 | } | |
c70878b4 AB |
215 | |
216 | return ret; | |
1da177e4 LT |
217 | } |
218 | ||
219 | static inline long get_compat_itimerval(struct itimerval *o, | |
220 | struct compat_itimerval __user *i) | |
221 | { | |
222 | return (!access_ok(VERIFY_READ, i, sizeof(*i)) || | |
223 | (__get_user(o->it_interval.tv_sec, &i->it_interval.tv_sec) | | |
224 | __get_user(o->it_interval.tv_usec, &i->it_interval.tv_usec) | | |
225 | __get_user(o->it_value.tv_sec, &i->it_value.tv_sec) | | |
226 | __get_user(o->it_value.tv_usec, &i->it_value.tv_usec))); | |
227 | } | |
228 | ||
229 | static inline long put_compat_itimerval(struct compat_itimerval __user *o, | |
230 | struct itimerval *i) | |
231 | { | |
232 | return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) || | |
233 | (__put_user(i->it_interval.tv_sec, &o->it_interval.tv_sec) | | |
234 | __put_user(i->it_interval.tv_usec, &o->it_interval.tv_usec) | | |
235 | __put_user(i->it_value.tv_sec, &o->it_value.tv_sec) | | |
236 | __put_user(i->it_value.tv_usec, &o->it_value.tv_usec))); | |
237 | } | |
238 | ||
239 | asmlinkage long compat_sys_getitimer(int which, | |
240 | struct compat_itimerval __user *it) | |
241 | { | |
242 | struct itimerval kit; | |
243 | int error; | |
244 | ||
245 | error = do_getitimer(which, &kit); | |
246 | if (!error && put_compat_itimerval(it, &kit)) | |
247 | error = -EFAULT; | |
248 | return error; | |
249 | } | |
250 | ||
251 | asmlinkage long compat_sys_setitimer(int which, | |
252 | struct compat_itimerval __user *in, | |
253 | struct compat_itimerval __user *out) | |
254 | { | |
255 | struct itimerval kin, kout; | |
256 | int error; | |
257 | ||
258 | if (in) { | |
259 | if (get_compat_itimerval(&kin, in)) | |
260 | return -EFAULT; | |
261 | } else | |
262 | memset(&kin, 0, sizeof(kin)); | |
263 | ||
264 | error = do_setitimer(which, &kin, out ? &kout : NULL); | |
265 | if (error || !out) | |
266 | return error; | |
267 | if (put_compat_itimerval(out, &kout)) | |
268 | return -EFAULT; | |
269 | return 0; | |
270 | } | |
271 | ||
f06febc9 FM |
272 | static compat_clock_t clock_t_to_compat_clock_t(clock_t x) |
273 | { | |
274 | return compat_jiffies_to_clock_t(clock_t_to_jiffies(x)); | |
275 | } | |
276 | ||
1da177e4 LT |
277 | asmlinkage long compat_sys_times(struct compat_tms __user *tbuf) |
278 | { | |
1da177e4 | 279 | if (tbuf) { |
f06febc9 | 280 | struct tms tms; |
1da177e4 | 281 | struct compat_tms tmp; |
f06febc9 FM |
282 | |
283 | do_sys_times(&tms); | |
284 | /* Convert our struct tms to the compat version. */ | |
285 | tmp.tms_utime = clock_t_to_compat_clock_t(tms.tms_utime); | |
286 | tmp.tms_stime = clock_t_to_compat_clock_t(tms.tms_stime); | |
287 | tmp.tms_cutime = clock_t_to_compat_clock_t(tms.tms_cutime); | |
288 | tmp.tms_cstime = clock_t_to_compat_clock_t(tms.tms_cstime); | |
1da177e4 LT |
289 | if (copy_to_user(tbuf, &tmp, sizeof(tmp))) |
290 | return -EFAULT; | |
291 | } | |
e3d5a27d | 292 | force_successful_syscall_return(); |
1da177e4 LT |
293 | return compat_jiffies_to_clock_t(jiffies); |
294 | } | |
295 | ||
be84cb43 CM |
296 | #ifdef __ARCH_WANT_SYS_SIGPENDING |
297 | ||
1da177e4 LT |
298 | /* |
299 | * Assumption: old_sigset_t and compat_old_sigset_t are both | |
300 | * types that can be passed to put_user()/get_user(). | |
301 | */ | |
302 | ||
303 | asmlinkage long compat_sys_sigpending(compat_old_sigset_t __user *set) | |
304 | { | |
305 | old_sigset_t s; | |
306 | long ret; | |
307 | mm_segment_t old_fs = get_fs(); | |
308 | ||
309 | set_fs(KERNEL_DS); | |
310 | ret = sys_sigpending((old_sigset_t __user *) &s); | |
311 | set_fs(old_fs); | |
312 | if (ret == 0) | |
313 | ret = put_user(s, set); | |
314 | return ret; | |
315 | } | |
316 | ||
be84cb43 CM |
317 | #endif |
318 | ||
319 | #ifdef __ARCH_WANT_SYS_SIGPROCMASK | |
320 | ||
1da177e4 LT |
321 | asmlinkage long compat_sys_sigprocmask(int how, compat_old_sigset_t __user *set, |
322 | compat_old_sigset_t __user *oset) | |
323 | { | |
324 | old_sigset_t s; | |
325 | long ret; | |
326 | mm_segment_t old_fs; | |
327 | ||
328 | if (set && get_user(s, set)) | |
329 | return -EFAULT; | |
330 | old_fs = get_fs(); | |
331 | set_fs(KERNEL_DS); | |
332 | ret = sys_sigprocmask(how, | |
333 | set ? (old_sigset_t __user *) &s : NULL, | |
334 | oset ? (old_sigset_t __user *) &s : NULL); | |
335 | set_fs(old_fs); | |
336 | if (ret == 0) | |
337 | if (oset) | |
338 | ret = put_user(s, oset); | |
339 | return ret; | |
340 | } | |
341 | ||
be84cb43 CM |
342 | #endif |
343 | ||
1da177e4 LT |
344 | asmlinkage long compat_sys_setrlimit(unsigned int resource, |
345 | struct compat_rlimit __user *rlim) | |
346 | { | |
347 | struct rlimit r; | |
1da177e4 LT |
348 | |
349 | if (!access_ok(VERIFY_READ, rlim, sizeof(*rlim)) || | |
350 | __get_user(r.rlim_cur, &rlim->rlim_cur) || | |
351 | __get_user(r.rlim_max, &rlim->rlim_max)) | |
352 | return -EFAULT; | |
353 | ||
354 | if (r.rlim_cur == COMPAT_RLIM_INFINITY) | |
355 | r.rlim_cur = RLIM_INFINITY; | |
356 | if (r.rlim_max == COMPAT_RLIM_INFINITY) | |
357 | r.rlim_max = RLIM_INFINITY; | |
b9518345 | 358 | return do_prlimit(current, resource, &r, NULL); |
1da177e4 LT |
359 | } |
360 | ||
361 | #ifdef COMPAT_RLIM_OLD_INFINITY | |
362 | ||
363 | asmlinkage long compat_sys_old_getrlimit(unsigned int resource, | |
364 | struct compat_rlimit __user *rlim) | |
365 | { | |
366 | struct rlimit r; | |
367 | int ret; | |
368 | mm_segment_t old_fs = get_fs(); | |
369 | ||
370 | set_fs(KERNEL_DS); | |
371 | ret = sys_old_getrlimit(resource, &r); | |
372 | set_fs(old_fs); | |
373 | ||
374 | if (!ret) { | |
375 | if (r.rlim_cur > COMPAT_RLIM_OLD_INFINITY) | |
376 | r.rlim_cur = COMPAT_RLIM_INFINITY; | |
377 | if (r.rlim_max > COMPAT_RLIM_OLD_INFINITY) | |
378 | r.rlim_max = COMPAT_RLIM_INFINITY; | |
379 | ||
380 | if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || | |
381 | __put_user(r.rlim_cur, &rlim->rlim_cur) || | |
382 | __put_user(r.rlim_max, &rlim->rlim_max)) | |
383 | return -EFAULT; | |
384 | } | |
385 | return ret; | |
386 | } | |
387 | ||
388 | #endif | |
389 | ||
b9518345 | 390 | asmlinkage long compat_sys_getrlimit(unsigned int resource, |
1da177e4 LT |
391 | struct compat_rlimit __user *rlim) |
392 | { | |
393 | struct rlimit r; | |
394 | int ret; | |
1da177e4 | 395 | |
b9518345 | 396 | ret = do_prlimit(current, resource, NULL, &r); |
1da177e4 LT |
397 | if (!ret) { |
398 | if (r.rlim_cur > COMPAT_RLIM_INFINITY) | |
399 | r.rlim_cur = COMPAT_RLIM_INFINITY; | |
400 | if (r.rlim_max > COMPAT_RLIM_INFINITY) | |
401 | r.rlim_max = COMPAT_RLIM_INFINITY; | |
402 | ||
403 | if (!access_ok(VERIFY_WRITE, rlim, sizeof(*rlim)) || | |
404 | __put_user(r.rlim_cur, &rlim->rlim_cur) || | |
405 | __put_user(r.rlim_max, &rlim->rlim_max)) | |
406 | return -EFAULT; | |
407 | } | |
408 | return ret; | |
409 | } | |
410 | ||
411 | int put_compat_rusage(const struct rusage *r, struct compat_rusage __user *ru) | |
412 | { | |
413 | if (!access_ok(VERIFY_WRITE, ru, sizeof(*ru)) || | |
414 | __put_user(r->ru_utime.tv_sec, &ru->ru_utime.tv_sec) || | |
415 | __put_user(r->ru_utime.tv_usec, &ru->ru_utime.tv_usec) || | |
416 | __put_user(r->ru_stime.tv_sec, &ru->ru_stime.tv_sec) || | |
417 | __put_user(r->ru_stime.tv_usec, &ru->ru_stime.tv_usec) || | |
418 | __put_user(r->ru_maxrss, &ru->ru_maxrss) || | |
419 | __put_user(r->ru_ixrss, &ru->ru_ixrss) || | |
420 | __put_user(r->ru_idrss, &ru->ru_idrss) || | |
421 | __put_user(r->ru_isrss, &ru->ru_isrss) || | |
422 | __put_user(r->ru_minflt, &ru->ru_minflt) || | |
423 | __put_user(r->ru_majflt, &ru->ru_majflt) || | |
424 | __put_user(r->ru_nswap, &ru->ru_nswap) || | |
425 | __put_user(r->ru_inblock, &ru->ru_inblock) || | |
426 | __put_user(r->ru_oublock, &ru->ru_oublock) || | |
427 | __put_user(r->ru_msgsnd, &ru->ru_msgsnd) || | |
428 | __put_user(r->ru_msgrcv, &ru->ru_msgrcv) || | |
429 | __put_user(r->ru_nsignals, &ru->ru_nsignals) || | |
430 | __put_user(r->ru_nvcsw, &ru->ru_nvcsw) || | |
431 | __put_user(r->ru_nivcsw, &ru->ru_nivcsw)) | |
432 | return -EFAULT; | |
433 | return 0; | |
434 | } | |
435 | ||
436 | asmlinkage long compat_sys_getrusage(int who, struct compat_rusage __user *ru) | |
437 | { | |
438 | struct rusage r; | |
439 | int ret; | |
440 | mm_segment_t old_fs = get_fs(); | |
441 | ||
442 | set_fs(KERNEL_DS); | |
443 | ret = sys_getrusage(who, (struct rusage __user *) &r); | |
444 | set_fs(old_fs); | |
445 | ||
446 | if (ret) | |
447 | return ret; | |
448 | ||
449 | if (put_compat_rusage(&r, ru)) | |
450 | return -EFAULT; | |
451 | ||
452 | return 0; | |
453 | } | |
454 | ||
455 | asmlinkage long | |
456 | compat_sys_wait4(compat_pid_t pid, compat_uint_t __user *stat_addr, int options, | |
457 | struct compat_rusage __user *ru) | |
458 | { | |
459 | if (!ru) { | |
460 | return sys_wait4(pid, stat_addr, options, NULL); | |
461 | } else { | |
462 | struct rusage r; | |
463 | int ret; | |
464 | unsigned int status; | |
465 | mm_segment_t old_fs = get_fs(); | |
466 | ||
467 | set_fs (KERNEL_DS); | |
468 | ret = sys_wait4(pid, | |
469 | (stat_addr ? | |
470 | (unsigned int __user *) &status : NULL), | |
471 | options, (struct rusage __user *) &r); | |
472 | set_fs (old_fs); | |
473 | ||
474 | if (ret > 0) { | |
475 | if (put_compat_rusage(&r, ru)) | |
476 | return -EFAULT; | |
477 | if (stat_addr && put_user(status, stat_addr)) | |
478 | return -EFAULT; | |
479 | } | |
480 | return ret; | |
481 | } | |
482 | } | |
483 | ||
484 | asmlinkage long compat_sys_waitid(int which, compat_pid_t pid, | |
485 | struct compat_siginfo __user *uinfo, int options, | |
486 | struct compat_rusage __user *uru) | |
487 | { | |
488 | siginfo_t info; | |
489 | struct rusage ru; | |
490 | long ret; | |
491 | mm_segment_t old_fs = get_fs(); | |
492 | ||
493 | memset(&info, 0, sizeof(info)); | |
494 | ||
495 | set_fs(KERNEL_DS); | |
496 | ret = sys_waitid(which, pid, (siginfo_t __user *)&info, options, | |
497 | uru ? (struct rusage __user *)&ru : NULL); | |
498 | set_fs(old_fs); | |
499 | ||
500 | if ((ret < 0) || (info.si_signo == 0)) | |
501 | return ret; | |
502 | ||
503 | if (uru) { | |
504 | ret = put_compat_rusage(&ru, uru); | |
505 | if (ret) | |
506 | return ret; | |
507 | } | |
508 | ||
509 | BUG_ON(info.si_code & __SI_MASK); | |
510 | info.si_code |= __SI_CHLD; | |
511 | return copy_siginfo_to_user32(uinfo, &info); | |
512 | } | |
513 | ||
514 | static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr, | |
a45185d2 | 515 | unsigned len, struct cpumask *new_mask) |
1da177e4 LT |
516 | { |
517 | unsigned long *k; | |
518 | ||
a45185d2 RR |
519 | if (len < cpumask_size()) |
520 | memset(new_mask, 0, cpumask_size()); | |
521 | else if (len > cpumask_size()) | |
522 | len = cpumask_size(); | |
1da177e4 | 523 | |
a45185d2 | 524 | k = cpumask_bits(new_mask); |
1da177e4 LT |
525 | return compat_get_bitmap(k, user_mask_ptr, len * 8); |
526 | } | |
527 | ||
528 | asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid, | |
529 | unsigned int len, | |
530 | compat_ulong_t __user *user_mask_ptr) | |
531 | { | |
a45185d2 | 532 | cpumask_var_t new_mask; |
1da177e4 LT |
533 | int retval; |
534 | ||
a45185d2 RR |
535 | if (!alloc_cpumask_var(&new_mask, GFP_KERNEL)) |
536 | return -ENOMEM; | |
537 | ||
538 | retval = compat_get_user_cpu_mask(user_mask_ptr, len, new_mask); | |
1da177e4 | 539 | if (retval) |
a45185d2 | 540 | goto out; |
1da177e4 | 541 | |
a45185d2 RR |
542 | retval = sched_setaffinity(pid, new_mask); |
543 | out: | |
544 | free_cpumask_var(new_mask); | |
545 | return retval; | |
1da177e4 LT |
546 | } |
547 | ||
548 | asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len, | |
549 | compat_ulong_t __user *user_mask_ptr) | |
550 | { | |
551 | int ret; | |
a45185d2 | 552 | cpumask_var_t mask; |
1da177e4 | 553 | |
fa9dc265 KM |
554 | if ((len * BITS_PER_BYTE) < nr_cpu_ids) |
555 | return -EINVAL; | |
556 | if (len & (sizeof(compat_ulong_t)-1)) | |
1da177e4 LT |
557 | return -EINVAL; |
558 | ||
a45185d2 RR |
559 | if (!alloc_cpumask_var(&mask, GFP_KERNEL)) |
560 | return -ENOMEM; | |
561 | ||
562 | ret = sched_getaffinity(pid, mask); | |
fa9dc265 KM |
563 | if (ret == 0) { |
564 | size_t retlen = min_t(size_t, len, cpumask_size()); | |
1da177e4 | 565 | |
fa9dc265 KM |
566 | if (compat_put_bitmap(user_mask_ptr, cpumask_bits(mask), retlen * 8)) |
567 | ret = -EFAULT; | |
568 | else | |
569 | ret = retlen; | |
570 | } | |
a45185d2 | 571 | free_cpumask_var(mask); |
fa9dc265 | 572 | |
a45185d2 | 573 | return ret; |
1da177e4 LT |
574 | } |
575 | ||
83f5d126 DL |
576 | int get_compat_itimerspec(struct itimerspec *dst, |
577 | const struct compat_itimerspec __user *src) | |
bd3a8492 | 578 | { |
1da177e4 LT |
579 | if (get_compat_timespec(&dst->it_interval, &src->it_interval) || |
580 | get_compat_timespec(&dst->it_value, &src->it_value)) | |
581 | return -EFAULT; | |
582 | return 0; | |
bd3a8492 | 583 | } |
1da177e4 | 584 | |
83f5d126 DL |
585 | int put_compat_itimerspec(struct compat_itimerspec __user *dst, |
586 | const struct itimerspec *src) | |
bd3a8492 | 587 | { |
1da177e4 LT |
588 | if (put_compat_timespec(&src->it_interval, &dst->it_interval) || |
589 | put_compat_timespec(&src->it_value, &dst->it_value)) | |
590 | return -EFAULT; | |
591 | return 0; | |
bd3a8492 | 592 | } |
1da177e4 | 593 | |
3a0f69d5 CH |
594 | long compat_sys_timer_create(clockid_t which_clock, |
595 | struct compat_sigevent __user *timer_event_spec, | |
596 | timer_t __user *created_timer_id) | |
597 | { | |
598 | struct sigevent __user *event = NULL; | |
599 | ||
600 | if (timer_event_spec) { | |
601 | struct sigevent kevent; | |
602 | ||
603 | event = compat_alloc_user_space(sizeof(*event)); | |
604 | if (get_compat_sigevent(&kevent, timer_event_spec) || | |
605 | copy_to_user(event, &kevent, sizeof(*event))) | |
606 | return -EFAULT; | |
607 | } | |
608 | ||
609 | return sys_timer_create(which_clock, event, created_timer_id); | |
610 | } | |
611 | ||
1da177e4 | 612 | long compat_sys_timer_settime(timer_t timer_id, int flags, |
bd3a8492 | 613 | struct compat_itimerspec __user *new, |
1da177e4 | 614 | struct compat_itimerspec __user *old) |
bd3a8492 | 615 | { |
1da177e4 LT |
616 | long err; |
617 | mm_segment_t oldfs; | |
618 | struct itimerspec newts, oldts; | |
619 | ||
620 | if (!new) | |
621 | return -EINVAL; | |
622 | if (get_compat_itimerspec(&newts, new)) | |
bd3a8492 | 623 | return -EFAULT; |
1da177e4 LT |
624 | oldfs = get_fs(); |
625 | set_fs(KERNEL_DS); | |
626 | err = sys_timer_settime(timer_id, flags, | |
627 | (struct itimerspec __user *) &newts, | |
628 | (struct itimerspec __user *) &oldts); | |
bd3a8492 | 629 | set_fs(oldfs); |
1da177e4 LT |
630 | if (!err && old && put_compat_itimerspec(old, &oldts)) |
631 | return -EFAULT; | |
632 | return err; | |
bd3a8492 | 633 | } |
1da177e4 LT |
634 | |
635 | long compat_sys_timer_gettime(timer_t timer_id, | |
636 | struct compat_itimerspec __user *setting) | |
bd3a8492 | 637 | { |
1da177e4 LT |
638 | long err; |
639 | mm_segment_t oldfs; | |
bd3a8492 | 640 | struct itimerspec ts; |
1da177e4 LT |
641 | |
642 | oldfs = get_fs(); | |
643 | set_fs(KERNEL_DS); | |
644 | err = sys_timer_gettime(timer_id, | |
bd3a8492 DW |
645 | (struct itimerspec __user *) &ts); |
646 | set_fs(oldfs); | |
1da177e4 LT |
647 | if (!err && put_compat_itimerspec(setting, &ts)) |
648 | return -EFAULT; | |
649 | return err; | |
bd3a8492 | 650 | } |
1da177e4 LT |
651 | |
652 | long compat_sys_clock_settime(clockid_t which_clock, | |
653 | struct compat_timespec __user *tp) | |
654 | { | |
655 | long err; | |
656 | mm_segment_t oldfs; | |
bd3a8492 | 657 | struct timespec ts; |
1da177e4 LT |
658 | |
659 | if (get_compat_timespec(&ts, tp)) | |
bd3a8492 | 660 | return -EFAULT; |
1da177e4 | 661 | oldfs = get_fs(); |
bd3a8492 | 662 | set_fs(KERNEL_DS); |
1da177e4 LT |
663 | err = sys_clock_settime(which_clock, |
664 | (struct timespec __user *) &ts); | |
665 | set_fs(oldfs); | |
666 | return err; | |
bd3a8492 | 667 | } |
1da177e4 LT |
668 | |
669 | long compat_sys_clock_gettime(clockid_t which_clock, | |
670 | struct compat_timespec __user *tp) | |
671 | { | |
672 | long err; | |
673 | mm_segment_t oldfs; | |
bd3a8492 | 674 | struct timespec ts; |
1da177e4 LT |
675 | |
676 | oldfs = get_fs(); | |
677 | set_fs(KERNEL_DS); | |
678 | err = sys_clock_gettime(which_clock, | |
679 | (struct timespec __user *) &ts); | |
680 | set_fs(oldfs); | |
681 | if (!err && put_compat_timespec(&ts, tp)) | |
bd3a8492 | 682 | return -EFAULT; |
1da177e4 | 683 | return err; |
bd3a8492 | 684 | } |
1da177e4 | 685 | |
f1f1d5eb RC |
686 | long compat_sys_clock_adjtime(clockid_t which_clock, |
687 | struct compat_timex __user *utp) | |
688 | { | |
689 | struct timex txc; | |
690 | mm_segment_t oldfs; | |
691 | int err, ret; | |
692 | ||
693 | err = compat_get_timex(&txc, utp); | |
694 | if (err) | |
695 | return err; | |
696 | ||
697 | oldfs = get_fs(); | |
698 | set_fs(KERNEL_DS); | |
699 | ret = sys_clock_adjtime(which_clock, (struct timex __user *) &txc); | |
700 | set_fs(oldfs); | |
701 | ||
702 | err = compat_put_timex(utp, &txc); | |
703 | if (err) | |
704 | return err; | |
705 | ||
706 | return ret; | |
707 | } | |
708 | ||
1da177e4 LT |
709 | long compat_sys_clock_getres(clockid_t which_clock, |
710 | struct compat_timespec __user *tp) | |
711 | { | |
712 | long err; | |
713 | mm_segment_t oldfs; | |
bd3a8492 | 714 | struct timespec ts; |
1da177e4 LT |
715 | |
716 | oldfs = get_fs(); | |
717 | set_fs(KERNEL_DS); | |
718 | err = sys_clock_getres(which_clock, | |
719 | (struct timespec __user *) &ts); | |
720 | set_fs(oldfs); | |
721 | if (!err && tp && put_compat_timespec(&ts, tp)) | |
bd3a8492 | 722 | return -EFAULT; |
1da177e4 | 723 | return err; |
bd3a8492 | 724 | } |
1da177e4 | 725 | |
1711ef38 TA |
726 | static long compat_clock_nanosleep_restart(struct restart_block *restart) |
727 | { | |
728 | long err; | |
729 | mm_segment_t oldfs; | |
730 | struct timespec tu; | |
029a07e0 | 731 | struct compat_timespec *rmtp = restart->nanosleep.compat_rmtp; |
1711ef38 | 732 | |
029a07e0 | 733 | restart->nanosleep.rmtp = (struct timespec __user *) &tu; |
1711ef38 TA |
734 | oldfs = get_fs(); |
735 | set_fs(KERNEL_DS); | |
736 | err = clock_nanosleep_restart(restart); | |
737 | set_fs(oldfs); | |
738 | ||
739 | if ((err == -ERESTART_RESTARTBLOCK) && rmtp && | |
740 | put_compat_timespec(&tu, rmtp)) | |
741 | return -EFAULT; | |
742 | ||
743 | if (err == -ERESTART_RESTARTBLOCK) { | |
744 | restart->fn = compat_clock_nanosleep_restart; | |
029a07e0 | 745 | restart->nanosleep.compat_rmtp = rmtp; |
1711ef38 TA |
746 | } |
747 | return err; | |
748 | } | |
749 | ||
1da177e4 LT |
750 | long compat_sys_clock_nanosleep(clockid_t which_clock, int flags, |
751 | struct compat_timespec __user *rqtp, | |
752 | struct compat_timespec __user *rmtp) | |
753 | { | |
754 | long err; | |
755 | mm_segment_t oldfs; | |
bd3a8492 | 756 | struct timespec in, out; |
1711ef38 | 757 | struct restart_block *restart; |
1da177e4 | 758 | |
bd3a8492 | 759 | if (get_compat_timespec(&in, rqtp)) |
1da177e4 LT |
760 | return -EFAULT; |
761 | ||
762 | oldfs = get_fs(); | |
763 | set_fs(KERNEL_DS); | |
764 | err = sys_clock_nanosleep(which_clock, flags, | |
765 | (struct timespec __user *) &in, | |
766 | (struct timespec __user *) &out); | |
767 | set_fs(oldfs); | |
1711ef38 | 768 | |
1da177e4 LT |
769 | if ((err == -ERESTART_RESTARTBLOCK) && rmtp && |
770 | put_compat_timespec(&out, rmtp)) | |
771 | return -EFAULT; | |
1711ef38 TA |
772 | |
773 | if (err == -ERESTART_RESTARTBLOCK) { | |
774 | restart = ¤t_thread_info()->restart_block; | |
775 | restart->fn = compat_clock_nanosleep_restart; | |
029a07e0 | 776 | restart->nanosleep.compat_rmtp = rmtp; |
1711ef38 | 777 | } |
bd3a8492 DW |
778 | return err; |
779 | } | |
1da177e4 LT |
780 | |
781 | /* | |
782 | * We currently only need the following fields from the sigevent | |
783 | * structure: sigev_value, sigev_signo, sig_notify and (sometimes | |
784 | * sigev_notify_thread_id). The others are handled in user mode. | |
785 | * We also assume that copying sigev_value.sival_int is sufficient | |
786 | * to keep all the bits of sigev_value.sival_ptr intact. | |
787 | */ | |
788 | int get_compat_sigevent(struct sigevent *event, | |
789 | const struct compat_sigevent __user *u_event) | |
790 | { | |
51410d3c | 791 | memset(event, 0, sizeof(*event)); |
1da177e4 LT |
792 | return (!access_ok(VERIFY_READ, u_event, sizeof(*u_event)) || |
793 | __get_user(event->sigev_value.sival_int, | |
794 | &u_event->sigev_value.sival_int) || | |
795 | __get_user(event->sigev_signo, &u_event->sigev_signo) || | |
796 | __get_user(event->sigev_notify, &u_event->sigev_notify) || | |
797 | __get_user(event->sigev_notify_thread_id, | |
798 | &u_event->sigev_notify_thread_id)) | |
799 | ? -EFAULT : 0; | |
800 | } | |
801 | ||
5fa3839a | 802 | long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask, |
1da177e4 LT |
803 | unsigned long bitmap_size) |
804 | { | |
805 | int i, j; | |
806 | unsigned long m; | |
807 | compat_ulong_t um; | |
808 | unsigned long nr_compat_longs; | |
809 | ||
810 | /* align bitmap up to nearest compat_long_t boundary */ | |
811 | bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); | |
812 | ||
813 | if (!access_ok(VERIFY_READ, umask, bitmap_size / 8)) | |
814 | return -EFAULT; | |
815 | ||
816 | nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); | |
817 | ||
818 | for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { | |
819 | m = 0; | |
820 | ||
821 | for (j = 0; j < sizeof(m)/sizeof(um); j++) { | |
822 | /* | |
823 | * We dont want to read past the end of the userspace | |
824 | * bitmap. We must however ensure the end of the | |
825 | * kernel bitmap is zeroed. | |
826 | */ | |
827 | if (nr_compat_longs-- > 0) { | |
828 | if (__get_user(um, umask)) | |
829 | return -EFAULT; | |
830 | } else { | |
831 | um = 0; | |
832 | } | |
833 | ||
834 | umask++; | |
835 | m |= (long)um << (j * BITS_PER_COMPAT_LONG); | |
836 | } | |
837 | *mask++ = m; | |
838 | } | |
839 | ||
840 | return 0; | |
841 | } | |
842 | ||
843 | long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask, | |
844 | unsigned long bitmap_size) | |
845 | { | |
846 | int i, j; | |
847 | unsigned long m; | |
848 | compat_ulong_t um; | |
849 | unsigned long nr_compat_longs; | |
850 | ||
851 | /* align bitmap up to nearest compat_long_t boundary */ | |
852 | bitmap_size = ALIGN(bitmap_size, BITS_PER_COMPAT_LONG); | |
853 | ||
854 | if (!access_ok(VERIFY_WRITE, umask, bitmap_size / 8)) | |
855 | return -EFAULT; | |
856 | ||
857 | nr_compat_longs = BITS_TO_COMPAT_LONGS(bitmap_size); | |
858 | ||
859 | for (i = 0; i < BITS_TO_LONGS(bitmap_size); i++) { | |
860 | m = *mask++; | |
861 | ||
862 | for (j = 0; j < sizeof(m)/sizeof(um); j++) { | |
863 | um = m; | |
864 | ||
865 | /* | |
866 | * We dont want to write past the end of the userspace | |
867 | * bitmap. | |
868 | */ | |
869 | if (nr_compat_longs-- > 0) { | |
870 | if (__put_user(um, umask)) | |
871 | return -EFAULT; | |
872 | } | |
873 | ||
874 | umask++; | |
875 | m >>= 4*sizeof(um); | |
876 | m >>= 4*sizeof(um); | |
877 | } | |
878 | } | |
879 | ||
880 | return 0; | |
881 | } | |
882 | ||
883 | void | |
884 | sigset_from_compat (sigset_t *set, compat_sigset_t *compat) | |
885 | { | |
886 | switch (_NSIG_WORDS) { | |
1da177e4 LT |
887 | case 4: set->sig[3] = compat->sig[6] | (((long)compat->sig[7]) << 32 ); |
888 | case 3: set->sig[2] = compat->sig[4] | (((long)compat->sig[5]) << 32 ); | |
889 | case 2: set->sig[1] = compat->sig[2] | (((long)compat->sig[3]) << 32 ); | |
890 | case 1: set->sig[0] = compat->sig[0] | (((long)compat->sig[1]) << 32 ); | |
1da177e4 LT |
891 | } |
892 | } | |
893 | ||
894 | asmlinkage long | |
895 | compat_sys_rt_sigtimedwait (compat_sigset_t __user *uthese, | |
896 | struct compat_siginfo __user *uinfo, | |
897 | struct compat_timespec __user *uts, compat_size_t sigsetsize) | |
898 | { | |
899 | compat_sigset_t s32; | |
900 | sigset_t s; | |
1da177e4 LT |
901 | struct timespec t; |
902 | siginfo_t info; | |
943df148 | 903 | long ret; |
1da177e4 LT |
904 | |
905 | if (sigsetsize != sizeof(sigset_t)) | |
906 | return -EINVAL; | |
907 | ||
908 | if (copy_from_user(&s32, uthese, sizeof(compat_sigset_t))) | |
909 | return -EFAULT; | |
910 | sigset_from_compat(&s, &s32); | |
1da177e4 LT |
911 | |
912 | if (uts) { | |
943df148 | 913 | if (get_compat_timespec(&t, uts)) |
1da177e4 | 914 | return -EFAULT; |
1da177e4 LT |
915 | } |
916 | ||
943df148 | 917 | ret = do_sigtimedwait(&s, &info, uts ? &t : NULL); |
1da177e4 | 918 | |
943df148 ON |
919 | if (ret > 0 && uinfo) { |
920 | if (copy_siginfo_to_user32(uinfo, &info)) | |
921 | ret = -EFAULT; | |
1da177e4 | 922 | } |
943df148 | 923 | |
1da177e4 LT |
924 | return ret; |
925 | ||
926 | } | |
927 | ||
62ab4505 TG |
928 | asmlinkage long |
929 | compat_sys_rt_tgsigqueueinfo(compat_pid_t tgid, compat_pid_t pid, int sig, | |
930 | struct compat_siginfo __user *uinfo) | |
931 | { | |
932 | siginfo_t info; | |
933 | ||
934 | if (copy_siginfo_from_user32(&info, uinfo)) | |
935 | return -EFAULT; | |
936 | return do_rt_tgsigqueueinfo(tgid, pid, sig, &info); | |
937 | } | |
938 | ||
1da177e4 LT |
939 | #ifdef __ARCH_WANT_COMPAT_SYS_TIME |
940 | ||
941 | /* compat_time_t is a 32 bit "long" and needs to get converted. */ | |
942 | ||
943 | asmlinkage long compat_sys_time(compat_time_t __user * tloc) | |
944 | { | |
945 | compat_time_t i; | |
946 | struct timeval tv; | |
947 | ||
948 | do_gettimeofday(&tv); | |
949 | i = tv.tv_sec; | |
950 | ||
951 | if (tloc) { | |
952 | if (put_user(i,tloc)) | |
e3d5a27d | 953 | return -EFAULT; |
1da177e4 | 954 | } |
e3d5a27d | 955 | force_successful_syscall_return(); |
1da177e4 LT |
956 | return i; |
957 | } | |
958 | ||
959 | asmlinkage long compat_sys_stime(compat_time_t __user *tptr) | |
960 | { | |
961 | struct timespec tv; | |
962 | int err; | |
963 | ||
964 | if (get_user(tv.tv_sec, tptr)) | |
965 | return -EFAULT; | |
966 | ||
967 | tv.tv_nsec = 0; | |
968 | ||
969 | err = security_settime(&tv, NULL); | |
970 | if (err) | |
971 | return err; | |
972 | ||
973 | do_settimeofday(&tv); | |
974 | return 0; | |
975 | } | |
976 | ||
977 | #endif /* __ARCH_WANT_COMPAT_SYS_TIME */ | |
150256d8 DW |
978 | |
979 | #ifdef __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND | |
980 | asmlinkage long compat_sys_rt_sigsuspend(compat_sigset_t __user *unewset, compat_size_t sigsetsize) | |
981 | { | |
982 | sigset_t newset; | |
983 | compat_sigset_t newset32; | |
984 | ||
985 | /* XXX: Don't preclude handling different sized sigset_t's. */ | |
986 | if (sigsetsize != sizeof(sigset_t)) | |
987 | return -EINVAL; | |
988 | ||
989 | if (copy_from_user(&newset32, unewset, sizeof(compat_sigset_t))) | |
990 | return -EFAULT; | |
991 | sigset_from_compat(&newset, &newset32); | |
992 | sigdelsetmask(&newset, sigmask(SIGKILL)|sigmask(SIGSTOP)); | |
993 | ||
994 | spin_lock_irq(¤t->sighand->siglock); | |
995 | current->saved_sigmask = current->blocked; | |
996 | current->blocked = newset; | |
997 | recalc_sigpending(); | |
998 | spin_unlock_irq(¤t->sighand->siglock); | |
999 | ||
1000 | current->state = TASK_INTERRUPTIBLE; | |
1001 | schedule(); | |
4e4c22c7 | 1002 | set_restore_sigmask(); |
150256d8 DW |
1003 | return -ERESTARTNOHAND; |
1004 | } | |
1005 | #endif /* __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND */ | |
3158e941 SR |
1006 | |
1007 | asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp) | |
1008 | { | |
1009 | struct timex txc; | |
65f5d80b | 1010 | int err, ret; |
3158e941 | 1011 | |
65f5d80b RC |
1012 | err = compat_get_timex(&txc, utp); |
1013 | if (err) | |
1014 | return err; | |
3158e941 SR |
1015 | |
1016 | ret = do_adjtimex(&txc); | |
1017 | ||
65f5d80b RC |
1018 | err = compat_put_timex(utp, &txc); |
1019 | if (err) | |
1020 | return err; | |
3158e941 SR |
1021 | |
1022 | return ret; | |
1023 | } | |
1b2db9fb CL |
1024 | |
1025 | #ifdef CONFIG_NUMA | |
1026 | asmlinkage long compat_sys_move_pages(pid_t pid, unsigned long nr_pages, | |
9216dfad | 1027 | compat_uptr_t __user *pages32, |
1b2db9fb CL |
1028 | const int __user *nodes, |
1029 | int __user *status, | |
1030 | int flags) | |
1031 | { | |
1032 | const void __user * __user *pages; | |
1033 | int i; | |
1034 | ||
1035 | pages = compat_alloc_user_space(nr_pages * sizeof(void *)); | |
1036 | for (i = 0; i < nr_pages; i++) { | |
1037 | compat_uptr_t p; | |
1038 | ||
9216dfad | 1039 | if (get_user(p, pages32 + i) || |
1b2db9fb CL |
1040 | put_user(compat_ptr(p), pages + i)) |
1041 | return -EFAULT; | |
1042 | } | |
1043 | return sys_move_pages(pid, nr_pages, pages, nodes, status, flags); | |
1044 | } | |
3fd59397 SR |
1045 | |
1046 | asmlinkage long compat_sys_migrate_pages(compat_pid_t pid, | |
1047 | compat_ulong_t maxnode, | |
1048 | const compat_ulong_t __user *old_nodes, | |
1049 | const compat_ulong_t __user *new_nodes) | |
1050 | { | |
1051 | unsigned long __user *old = NULL; | |
1052 | unsigned long __user *new = NULL; | |
1053 | nodemask_t tmp_mask; | |
1054 | unsigned long nr_bits; | |
1055 | unsigned long size; | |
1056 | ||
1057 | nr_bits = min_t(unsigned long, maxnode - 1, MAX_NUMNODES); | |
1058 | size = ALIGN(nr_bits, BITS_PER_LONG) / 8; | |
1059 | if (old_nodes) { | |
1060 | if (compat_get_bitmap(nodes_addr(tmp_mask), old_nodes, nr_bits)) | |
1061 | return -EFAULT; | |
1062 | old = compat_alloc_user_space(new_nodes ? size * 2 : size); | |
1063 | if (new_nodes) | |
1064 | new = old + size / sizeof(unsigned long); | |
1065 | if (copy_to_user(old, nodes_addr(tmp_mask), size)) | |
1066 | return -EFAULT; | |
1067 | } | |
1068 | if (new_nodes) { | |
1069 | if (compat_get_bitmap(nodes_addr(tmp_mask), new_nodes, nr_bits)) | |
1070 | return -EFAULT; | |
1071 | if (new == NULL) | |
1072 | new = compat_alloc_user_space(size); | |
1073 | if (copy_to_user(new, nodes_addr(tmp_mask), size)) | |
1074 | return -EFAULT; | |
1075 | } | |
1076 | return sys_migrate_pages(pid, nr_bits + 1, old, new); | |
1077 | } | |
1b2db9fb | 1078 | #endif |
d4d23add KM |
1079 | |
1080 | struct compat_sysinfo { | |
1081 | s32 uptime; | |
1082 | u32 loads[3]; | |
1083 | u32 totalram; | |
1084 | u32 freeram; | |
1085 | u32 sharedram; | |
1086 | u32 bufferram; | |
1087 | u32 totalswap; | |
1088 | u32 freeswap; | |
1089 | u16 procs; | |
1090 | u16 pad; | |
1091 | u32 totalhigh; | |
1092 | u32 freehigh; | |
1093 | u32 mem_unit; | |
1094 | char _f[20-2*sizeof(u32)-sizeof(int)]; | |
1095 | }; | |
1096 | ||
1097 | asmlinkage long | |
1098 | compat_sys_sysinfo(struct compat_sysinfo __user *info) | |
1099 | { | |
1100 | struct sysinfo s; | |
1101 | ||
1102 | do_sysinfo(&s); | |
1103 | ||
1104 | /* Check to see if any memory value is too large for 32-bit and scale | |
1105 | * down if needed | |
1106 | */ | |
1107 | if ((s.totalram >> 32) || (s.totalswap >> 32)) { | |
1108 | int bitcount = 0; | |
1109 | ||
1110 | while (s.mem_unit < PAGE_SIZE) { | |
1111 | s.mem_unit <<= 1; | |
1112 | bitcount++; | |
1113 | } | |
1114 | ||
1115 | s.totalram >>= bitcount; | |
1116 | s.freeram >>= bitcount; | |
1117 | s.sharedram >>= bitcount; | |
1118 | s.bufferram >>= bitcount; | |
1119 | s.totalswap >>= bitcount; | |
1120 | s.freeswap >>= bitcount; | |
1121 | s.totalhigh >>= bitcount; | |
1122 | s.freehigh >>= bitcount; | |
1123 | } | |
1124 | ||
1125 | if (!access_ok(VERIFY_WRITE, info, sizeof(struct compat_sysinfo)) || | |
1126 | __put_user (s.uptime, &info->uptime) || | |
1127 | __put_user (s.loads[0], &info->loads[0]) || | |
1128 | __put_user (s.loads[1], &info->loads[1]) || | |
1129 | __put_user (s.loads[2], &info->loads[2]) || | |
1130 | __put_user (s.totalram, &info->totalram) || | |
1131 | __put_user (s.freeram, &info->freeram) || | |
1132 | __put_user (s.sharedram, &info->sharedram) || | |
1133 | __put_user (s.bufferram, &info->bufferram) || | |
1134 | __put_user (s.totalswap, &info->totalswap) || | |
1135 | __put_user (s.freeswap, &info->freeswap) || | |
1136 | __put_user (s.procs, &info->procs) || | |
1137 | __put_user (s.totalhigh, &info->totalhigh) || | |
1138 | __put_user (s.freehigh, &info->freehigh) || | |
1139 | __put_user (s.mem_unit, &info->mem_unit)) | |
1140 | return -EFAULT; | |
1141 | ||
1142 | return 0; | |
1143 | } | |
c41d68a5 PA |
1144 | |
1145 | /* | |
1146 | * Allocate user-space memory for the duration of a single system call, | |
1147 | * in order to marshall parameters inside a compat thunk. | |
1148 | */ | |
1149 | void __user *compat_alloc_user_space(unsigned long len) | |
1150 | { | |
1151 | void __user *ptr; | |
1152 | ||
1153 | /* If len would occupy more than half of the entire compat space... */ | |
1154 | if (unlikely(len > (((compat_uptr_t)~0) >> 1))) | |
1155 | return NULL; | |
1156 | ||
1157 | ptr = arch_compat_alloc_user_space(len); | |
1158 | ||
1159 | if (unlikely(!access_ok(VERIFY_WRITE, ptr, len))) | |
1160 | return NULL; | |
1161 | ||
1162 | return ptr; | |
1163 | } | |
1164 | EXPORT_SYMBOL_GPL(compat_alloc_user_space); |