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1 | /* |
2 | * 32 bit compatibility code for System V IPC |
3 | * |
4 | * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) |
5 | * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) |
6 | * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com> |
7 | * Copyright (C) 2000 VA Linux Co |
8 | * Copyright (C) 2000 Don Dugger <n0ano@valinux.com> |
9 | * Copyright (C) 2000 Hewlett-Packard Co. |
10 | * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com> |
11 | * Copyright (C) 2000 Gerhard Tonn (ton@de.ibm.com) |
12 | * Copyright (C) 2000-2002 Andi Kleen, SuSE Labs (x86-64 port) |
13 | * Copyright (C) 2000 Silicon Graphics, Inc. |
14 | * Copyright (C) 2001 IBM |
15 | * Copyright (C) 2004 IBM Deutschland Entwicklung GmbH, IBM Corporation |
16 | * Copyright (C) 2004 Arnd Bergmann (arnd@arndb.de) |
17 | * |
18 | * This code is collected from the versions for sparc64, mips64, s390x, ia64, |
19 | * ppc64 and x86_64, all of which are based on the original sparc64 version |
20 | * by Jakub Jelinek. |
21 | * |
22 | */ |
23 | #include <linux/compat.h> |
24 | #include <linux/errno.h> |
25 | #include <linux/highuid.h> |
26 | #include <linux/init.h> |
27 | #include <linux/msg.h> |
28 | #include <linux/shm.h> |
29 | #include <linux/syscalls.h> |
30 | |
31 | #include <linux/mutex.h> |
32 | #include <asm/uaccess.h> |
33 | |
34 | #include "util.h" |
35 | |
36 | struct compat_msgbuf { |
37 | compat_long_t mtype; |
38 | char mtext[1]; |
39 | }; |
40 | |
41 | struct compat_ipc_perm { |
42 | key_t key; |
43 | __compat_uid_t uid; |
44 | __compat_gid_t gid; |
45 | __compat_uid_t cuid; |
46 | __compat_gid_t cgid; |
47 | compat_mode_t mode; |
48 | unsigned short seq; |
49 | }; |
50 | |
51 | struct compat_semid_ds { |
52 | struct compat_ipc_perm sem_perm; |
53 | compat_time_t sem_otime; |
54 | compat_time_t sem_ctime; |
55 | compat_uptr_t sem_base; |
56 | compat_uptr_t sem_pending; |
57 | compat_uptr_t sem_pending_last; |
58 | compat_uptr_t undo; |
59 | unsigned short sem_nsems; |
60 | }; |
61 | |
62 | struct compat_msqid_ds { |
63 | struct compat_ipc_perm msg_perm; |
64 | compat_uptr_t msg_first; |
65 | compat_uptr_t msg_last; |
66 | compat_time_t msg_stime; |
67 | compat_time_t msg_rtime; |
68 | compat_time_t msg_ctime; |
69 | compat_ulong_t msg_lcbytes; |
70 | compat_ulong_t msg_lqbytes; |
71 | unsigned short msg_cbytes; |
72 | unsigned short msg_qnum; |
73 | unsigned short msg_qbytes; |
74 | compat_ipc_pid_t msg_lspid; |
75 | compat_ipc_pid_t msg_lrpid; |
76 | }; |
77 | |
78 | struct compat_shmid_ds { |
79 | struct compat_ipc_perm shm_perm; |
80 | int shm_segsz; |
81 | compat_time_t shm_atime; |
82 | compat_time_t shm_dtime; |
83 | compat_time_t shm_ctime; |
84 | compat_ipc_pid_t shm_cpid; |
85 | compat_ipc_pid_t shm_lpid; |
86 | unsigned short shm_nattch; |
87 | unsigned short shm_unused; |
88 | compat_uptr_t shm_unused2; |
89 | compat_uptr_t shm_unused3; |
90 | }; |
91 | |
92 | struct compat_ipc_kludge { |
93 | compat_uptr_t msgp; |
94 | compat_long_t msgtyp; |
95 | }; |
96 | |
97 | struct compat_shminfo64 { |
98 | compat_ulong_t shmmax; |
99 | compat_ulong_t shmmin; |
100 | compat_ulong_t shmmni; |
101 | compat_ulong_t shmseg; |
102 | compat_ulong_t shmall; |
103 | compat_ulong_t __unused1; |
104 | compat_ulong_t __unused2; |
105 | compat_ulong_t __unused3; |
106 | compat_ulong_t __unused4; |
107 | }; |
108 | |
109 | struct compat_shm_info { |
110 | compat_int_t used_ids; |
111 | compat_ulong_t shm_tot, shm_rss, shm_swp; |
112 | compat_ulong_t swap_attempts, swap_successes; |
113 | }; |
114 | |
115 | extern int sem_ctls[]; |
116 | #define sc_semopm (sem_ctls[2]) |
117 | |
118 | static inline int compat_ipc_parse_version(int *cmd) |
119 | { |
120 | int version = *cmd & IPC_64; |
121 | |
122 | /* this is tricky: architectures that have support for the old |
123 | * ipc structures in 64 bit binaries need to have IPC_64 set |
124 | * in cmd, the others need to have it cleared */ |
125 | #ifndef ipc_parse_version |
126 | *cmd |= IPC_64; |
127 | #else |
128 | *cmd &= ~IPC_64; |
129 | #endif |
130 | return version; |
131 | } |
132 | |
133 | static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64, |
134 | struct compat_ipc64_perm __user *up64) |
135 | { |
136 | int err; |
137 | |
138 | err = __get_user(p64->uid, &up64->uid); |
139 | err |= __get_user(p64->gid, &up64->gid); |
140 | err |= __get_user(p64->mode, &up64->mode); |
141 | return err; |
142 | } |
143 | |
144 | static inline int __get_compat_ipc_perm(struct ipc64_perm *p, |
145 | struct compat_ipc_perm __user *up) |
146 | { |
147 | int err; |
148 | |
149 | err = __get_user(p->uid, &up->uid); |
150 | err |= __get_user(p->gid, &up->gid); |
151 | err |= __get_user(p->mode, &up->mode); |
152 | return err; |
153 | } |
154 | |
155 | static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64, |
156 | struct compat_ipc64_perm __user *up64) |
157 | { |
158 | int err; |
159 | |
160 | err = __put_user(p64->key, &up64->key); |
161 | err |= __put_user(p64->uid, &up64->uid); |
162 | err |= __put_user(p64->gid, &up64->gid); |
163 | err |= __put_user(p64->cuid, &up64->cuid); |
164 | err |= __put_user(p64->cgid, &up64->cgid); |
165 | err |= __put_user(p64->mode, &up64->mode); |
166 | err |= __put_user(p64->seq, &up64->seq); |
167 | return err; |
168 | } |
169 | |
170 | static inline int __put_compat_ipc_perm(struct ipc64_perm *p, |
171 | struct compat_ipc_perm __user *up) |
172 | { |
173 | int err; |
174 | __compat_uid_t u; |
175 | __compat_gid_t g; |
176 | |
177 | err = __put_user(p->key, &up->key); |
178 | SET_UID(u, p->uid); |
179 | err |= __put_user(u, &up->uid); |
180 | SET_GID(g, p->gid); |
181 | err |= __put_user(g, &up->gid); |
182 | SET_UID(u, p->cuid); |
183 | err |= __put_user(u, &up->cuid); |
184 | SET_GID(g, p->cgid); |
185 | err |= __put_user(g, &up->cgid); |
186 | err |= __put_user(p->mode, &up->mode); |
187 | err |= __put_user(p->seq, &up->seq); |
188 | return err; |
189 | } |
190 | |
191 | static inline int get_compat_semid64_ds(struct semid64_ds *s64, |
192 | struct compat_semid64_ds __user *up64) |
193 | { |
194 | if (!access_ok (VERIFY_READ, up64, sizeof(*up64))) |
195 | return -EFAULT; |
196 | return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm); |
197 | } |
198 | |
199 | static inline int get_compat_semid_ds(struct semid64_ds *s, |
200 | struct compat_semid_ds __user *up) |
201 | { |
202 | if (!access_ok (VERIFY_READ, up, sizeof(*up))) |
203 | return -EFAULT; |
204 | return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm); |
205 | } |
206 | |
207 | static inline int put_compat_semid64_ds(struct semid64_ds *s64, |
208 | struct compat_semid64_ds __user *up64) |
209 | { |
210 | int err; |
211 | |
212 | if (!access_ok (VERIFY_WRITE, up64, sizeof(*up64))) |
213 | return -EFAULT; |
214 | err = __put_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm); |
215 | err |= __put_user(s64->sem_otime, &up64->sem_otime); |
216 | err |= __put_user(s64->sem_ctime, &up64->sem_ctime); |
217 | err |= __put_user(s64->sem_nsems, &up64->sem_nsems); |
218 | return err; |
219 | } |
220 | |
221 | static inline int put_compat_semid_ds(struct semid64_ds *s, |
222 | struct compat_semid_ds __user *up) |
223 | { |
224 | int err; |
225 | |
226 | if (!access_ok (VERIFY_WRITE, up, sizeof(*up))) |
227 | return -EFAULT; |
228 | err = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm); |
229 | err |= __put_user(s->sem_otime, &up->sem_otime); |
230 | err |= __put_user(s->sem_ctime, &up->sem_ctime); |
231 | err |= __put_user(s->sem_nsems, &up->sem_nsems); |
232 | return err; |
233 | } |
234 | |
235 | long compat_sys_semctl(int first, int second, int third, void __user *uptr) |
236 | { |
237 | union semun fourth; |
238 | u32 pad; |
239 | int err, err2; |
240 | struct semid64_ds s64; |
241 | struct semid64_ds __user *up64; |
242 | int version = compat_ipc_parse_version(&third); |
243 | |
244 | if (!uptr) |
245 | return -EINVAL; |
246 | if (get_user(pad, (u32 __user *) uptr)) |
247 | return -EFAULT; |
248 | if ((third & (~IPC_64)) == SETVAL) |
249 | fourth.val = (int) pad; |
250 | else |
251 | fourth.__pad = compat_ptr(pad); |
252 | switch (third & (~IPC_64)) { |
253 | case IPC_INFO: |
254 | case IPC_RMID: |
255 | case SEM_INFO: |
256 | case GETVAL: |
257 | case GETPID: |
258 | case GETNCNT: |
259 | case GETZCNT: |
260 | case GETALL: |
261 | case SETVAL: |
262 | case SETALL: |
263 | err = sys_semctl(first, second, third, fourth); |
264 | break; |
265 | |
266 | case IPC_STAT: |
267 | case SEM_STAT: |
268 | up64 = compat_alloc_user_space(sizeof(s64)); |
269 | fourth.__pad = up64; |
270 | err = sys_semctl(first, second, third, fourth); |
271 | if (err < 0) |
272 | break; |
273 | if (copy_from_user(&s64, up64, sizeof(s64))) |
274 | err2 = -EFAULT; |
275 | else if (version == IPC_64) |
276 | err2 = put_compat_semid64_ds(&s64, compat_ptr(pad)); |
277 | else |
278 | err2 = put_compat_semid_ds(&s64, compat_ptr(pad)); |
279 | if (err2) |
280 | err = -EFAULT; |
281 | break; |
282 | |
283 | case IPC_SET: |
284 | if (version == IPC_64) { |
285 | err = get_compat_semid64_ds(&s64, compat_ptr(pad)); |
286 | } else { |
287 | err = get_compat_semid_ds(&s64, compat_ptr(pad)); |
288 | } |
289 | up64 = compat_alloc_user_space(sizeof(s64)); |
290 | if (copy_to_user(up64, &s64, sizeof(s64))) |
291 | err = -EFAULT; |
292 | if (err) |
293 | break; |
294 | |
295 | fourth.__pad = up64; |
296 | err = sys_semctl(first, second, third, fourth); |
297 | break; |
298 | |
299 | default: |
300 | err = -EINVAL; |
301 | break; |
302 | } |
303 | return err; |
304 | } |
305 | |
306 | long compat_sys_msgsnd(int first, int second, int third, void __user *uptr) |
307 | { |
308 | struct compat_msgbuf __user *up = uptr; |
309 | long type; |
310 | |
311 | if (first < 0) |
312 | return -EINVAL; |
313 | if (second < 0) |
314 | return -EINVAL; |
315 | |
316 | if (get_user(type, &up->mtype)) |
317 | return -EFAULT; |
318 | |
319 | return do_msgsnd(first, type, up->mtext, second, third); |
320 | } |
321 | |
322 | long compat_sys_msgrcv(int first, int second, int msgtyp, int third, |
323 | int version, void __user *uptr) |
324 | { |
325 | struct compat_msgbuf __user *up; |
326 | long type; |
327 | int err; |
328 | |
329 | if (first < 0) |
330 | return -EINVAL; |
331 | if (second < 0) |
332 | return -EINVAL; |
333 | |
334 | if (!version) { |
335 | struct compat_ipc_kludge ipck; |
336 | err = -EINVAL; |
337 | if (!uptr) |
338 | goto out; |
339 | err = -EFAULT; |
340 | if (copy_from_user (&ipck, uptr, sizeof(ipck))) |
341 | goto out; |
342 | uptr = compat_ptr(ipck.msgp); |
343 | msgtyp = ipck.msgtyp; |
344 | } |
345 | up = uptr; |
346 | err = do_msgrcv(first, &type, up->mtext, second, msgtyp, third); |
347 | if (err < 0) |
348 | goto out; |
349 | if (put_user(type, &up->mtype)) |
350 | err = -EFAULT; |
351 | out: |
352 | return err; |
353 | } |
354 | |
355 | static inline int get_compat_msqid64(struct msqid64_ds *m64, |
356 | struct compat_msqid64_ds __user *up64) |
357 | { |
358 | int err; |
359 | |
360 | if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) |
361 | return -EFAULT; |
362 | err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); |
363 | err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes); |
364 | return err; |
365 | } |
366 | |
367 | static inline int get_compat_msqid(struct msqid64_ds *m, |
368 | struct compat_msqid_ds __user *up) |
369 | { |
370 | int err; |
371 | |
372 | if (!access_ok(VERIFY_READ, up, sizeof(*up))) |
373 | return -EFAULT; |
374 | err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm); |
375 | err |= __get_user(m->msg_qbytes, &up->msg_qbytes); |
376 | return err; |
377 | } |
378 | |
379 | static inline int put_compat_msqid64_ds(struct msqid64_ds *m64, |
380 | struct compat_msqid64_ds __user *up64) |
381 | { |
382 | int err; |
383 | |
384 | if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) |
385 | return -EFAULT; |
386 | err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); |
387 | err |= __put_user(m64->msg_stime, &up64->msg_stime); |
388 | err |= __put_user(m64->msg_rtime, &up64->msg_rtime); |
389 | err |= __put_user(m64->msg_ctime, &up64->msg_ctime); |
390 | err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes); |
391 | err |= __put_user(m64->msg_qnum, &up64->msg_qnum); |
392 | err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes); |
393 | err |= __put_user(m64->msg_lspid, &up64->msg_lspid); |
394 | err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid); |
395 | return err; |
396 | } |
397 | |
398 | static inline int put_compat_msqid_ds(struct msqid64_ds *m, |
399 | struct compat_msqid_ds __user *up) |
400 | { |
401 | int err; |
402 | |
403 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) |
404 | return -EFAULT; |
405 | err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm); |
406 | err |= __put_user(m->msg_stime, &up->msg_stime); |
407 | err |= __put_user(m->msg_rtime, &up->msg_rtime); |
408 | err |= __put_user(m->msg_ctime, &up->msg_ctime); |
409 | err |= __put_user(m->msg_cbytes, &up->msg_cbytes); |
410 | err |= __put_user(m->msg_qnum, &up->msg_qnum); |
411 | err |= __put_user(m->msg_qbytes, &up->msg_qbytes); |
412 | err |= __put_user(m->msg_lspid, &up->msg_lspid); |
413 | err |= __put_user(m->msg_lrpid, &up->msg_lrpid); |
414 | return err; |
415 | } |
416 | |
417 | long compat_sys_msgctl(int first, int second, void __user *uptr) |
418 | { |
419 | int err, err2; |
420 | struct msqid64_ds m64; |
421 | int version = compat_ipc_parse_version(&second); |
422 | void __user *p; |
423 | |
424 | switch (second & (~IPC_64)) { |
425 | case IPC_INFO: |
426 | case IPC_RMID: |
427 | case MSG_INFO: |
428 | err = sys_msgctl(first, second, uptr); |
429 | break; |
430 | |
431 | case IPC_SET: |
432 | if (version == IPC_64) { |
433 | err = get_compat_msqid64(&m64, uptr); |
434 | } else { |
435 | err = get_compat_msqid(&m64, uptr); |
436 | } |
437 | if (err) |
438 | break; |
439 | p = compat_alloc_user_space(sizeof(m64)); |
440 | if (copy_to_user(p, &m64, sizeof(m64))) |
441 | err = -EFAULT; |
442 | else |
443 | err = sys_msgctl(first, second, p); |
444 | break; |
445 | |
446 | case IPC_STAT: |
447 | case MSG_STAT: |
448 | p = compat_alloc_user_space(sizeof(m64)); |
449 | err = sys_msgctl(first, second, p); |
450 | if (err < 0) |
451 | break; |
452 | if (copy_from_user(&m64, p, sizeof(m64))) |
453 | err2 = -EFAULT; |
454 | else if (version == IPC_64) |
455 | err2 = put_compat_msqid64_ds(&m64, uptr); |
456 | else |
457 | err2 = put_compat_msqid_ds(&m64, uptr); |
458 | if (err2) |
459 | err = -EFAULT; |
460 | break; |
461 | |
462 | default: |
463 | err = -EINVAL; |
464 | break; |
465 | } |
466 | return err; |
467 | } |
468 | |
469 | long compat_sys_shmat(int first, int second, compat_uptr_t third, int version, |
470 | void __user *uptr) |
471 | { |
472 | int err; |
473 | unsigned long raddr; |
474 | compat_ulong_t __user *uaddr; |
475 | |
476 | if (version == 1) |
477 | return -EINVAL; |
478 | err = do_shmat(first, uptr, second, &raddr); |
479 | if (err < 0) |
480 | return err; |
481 | uaddr = compat_ptr(third); |
482 | return put_user(raddr, uaddr); |
483 | } |
484 | |
485 | static inline int get_compat_shmid64_ds(struct shmid64_ds *s64, |
486 | struct compat_shmid64_ds __user *up64) |
487 | { |
488 | if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) |
489 | return -EFAULT; |
490 | return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); |
491 | } |
492 | |
493 | static inline int get_compat_shmid_ds(struct shmid64_ds *s, |
494 | struct compat_shmid_ds __user *up) |
495 | { |
496 | if (!access_ok(VERIFY_READ, up, sizeof(*up))) |
497 | return -EFAULT; |
498 | return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm); |
499 | } |
500 | |
501 | static inline int put_compat_shmid64_ds(struct shmid64_ds *s64, |
502 | struct compat_shmid64_ds __user *up64) |
503 | { |
504 | int err; |
505 | |
506 | if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) |
507 | return -EFAULT; |
508 | err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); |
509 | err |= __put_user(s64->shm_atime, &up64->shm_atime); |
510 | err |= __put_user(s64->shm_dtime, &up64->shm_dtime); |
511 | err |= __put_user(s64->shm_ctime, &up64->shm_ctime); |
512 | err |= __put_user(s64->shm_segsz, &up64->shm_segsz); |
513 | err |= __put_user(s64->shm_nattch, &up64->shm_nattch); |
514 | err |= __put_user(s64->shm_cpid, &up64->shm_cpid); |
515 | err |= __put_user(s64->shm_lpid, &up64->shm_lpid); |
516 | return err; |
517 | } |
518 | |
519 | static inline int put_compat_shmid_ds(struct shmid64_ds *s, |
520 | struct compat_shmid_ds __user *up) |
521 | { |
522 | int err; |
523 | |
524 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) |
525 | return -EFAULT; |
526 | err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm); |
527 | err |= __put_user(s->shm_atime, &up->shm_atime); |
528 | err |= __put_user(s->shm_dtime, &up->shm_dtime); |
529 | err |= __put_user(s->shm_ctime, &up->shm_ctime); |
530 | err |= __put_user(s->shm_segsz, &up->shm_segsz); |
531 | err |= __put_user(s->shm_nattch, &up->shm_nattch); |
532 | err |= __put_user(s->shm_cpid, &up->shm_cpid); |
533 | err |= __put_user(s->shm_lpid, &up->shm_lpid); |
534 | return err; |
535 | } |
536 | |
537 | static inline int put_compat_shminfo64(struct shminfo64 *smi, |
538 | struct compat_shminfo64 __user *up64) |
539 | { |
540 | int err; |
541 | |
542 | if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) |
543 | return -EFAULT; |
544 | if (smi->shmmax > INT_MAX) |
545 | smi->shmmax = INT_MAX; |
546 | err = __put_user(smi->shmmax, &up64->shmmax); |
547 | err |= __put_user(smi->shmmin, &up64->shmmin); |
548 | err |= __put_user(smi->shmmni, &up64->shmmni); |
549 | err |= __put_user(smi->shmseg, &up64->shmseg); |
550 | err |= __put_user(smi->shmall, &up64->shmall); |
551 | return err; |
552 | } |
553 | |
554 | static inline int put_compat_shminfo(struct shminfo64 *smi, |
555 | struct shminfo __user *up) |
556 | { |
557 | int err; |
558 | |
559 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) |
560 | return -EFAULT; |
561 | if (smi->shmmax > INT_MAX) |
562 | smi->shmmax = INT_MAX; |
563 | err = __put_user(smi->shmmax, &up->shmmax); |
564 | err |= __put_user(smi->shmmin, &up->shmmin); |
565 | err |= __put_user(smi->shmmni, &up->shmmni); |
566 | err |= __put_user(smi->shmseg, &up->shmseg); |
567 | err |= __put_user(smi->shmall, &up->shmall); |
568 | return err; |
569 | } |
570 | |
571 | static inline int put_compat_shm_info(struct shm_info __user *ip, |
572 | struct compat_shm_info __user *uip) |
573 | { |
574 | int err; |
575 | struct shm_info si; |
576 | |
577 | if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) || |
578 | copy_from_user(&si, ip, sizeof(si))) |
579 | return -EFAULT; |
580 | err = __put_user(si.used_ids, &uip->used_ids); |
581 | err |= __put_user(si.shm_tot, &uip->shm_tot); |
582 | err |= __put_user(si.shm_rss, &uip->shm_rss); |
583 | err |= __put_user(si.shm_swp, &uip->shm_swp); |
584 | err |= __put_user(si.swap_attempts, &uip->swap_attempts); |
585 | err |= __put_user(si.swap_successes, &uip->swap_successes); |
586 | return err; |
587 | } |
588 | |
589 | long compat_sys_shmctl(int first, int second, void __user *uptr) |
590 | { |
591 | void __user *p; |
592 | struct shmid64_ds s64; |
593 | struct shminfo64 smi; |
594 | int err, err2; |
595 | int version = compat_ipc_parse_version(&second); |
596 | |
597 | switch (second & (~IPC_64)) { |
598 | case IPC_RMID: |
599 | case SHM_LOCK: |
600 | case SHM_UNLOCK: |
601 | err = sys_shmctl(first, second, uptr); |
602 | break; |
603 | |
604 | case IPC_INFO: |
605 | p = compat_alloc_user_space(sizeof(smi)); |
606 | err = sys_shmctl(first, second, p); |
607 | if (err < 0) |
608 | break; |
609 | if (copy_from_user(&smi, p, sizeof(smi))) |
610 | err2 = -EFAULT; |
611 | else if (version == IPC_64) |
612 | err2 = put_compat_shminfo64(&smi, uptr); |
613 | else |
614 | err2 = put_compat_shminfo(&smi, uptr); |
615 | if (err2) |
616 | err = -EFAULT; |
617 | break; |
618 | |
619 | |
620 | case IPC_SET: |
621 | if (version == IPC_64) { |
622 | err = get_compat_shmid64_ds(&s64, uptr); |
623 | } else { |
624 | err = get_compat_shmid_ds(&s64, uptr); |
625 | } |
626 | if (err) |
627 | break; |
628 | p = compat_alloc_user_space(sizeof(s64)); |
629 | if (copy_to_user(p, &s64, sizeof(s64))) |
630 | err = -EFAULT; |
631 | else |
632 | err = sys_shmctl(first, second, p); |
633 | break; |
634 | |
635 | case IPC_STAT: |
636 | case SHM_STAT: |
637 | p = compat_alloc_user_space(sizeof(s64)); |
638 | err = sys_shmctl(first, second, p); |
639 | if (err < 0) |
640 | break; |
641 | if (copy_from_user(&s64, p, sizeof(s64))) |
642 | err2 = -EFAULT; |
643 | else if (version == IPC_64) |
644 | err2 = put_compat_shmid64_ds(&s64, uptr); |
645 | else |
646 | err2 = put_compat_shmid_ds(&s64, uptr); |
647 | if (err2) |
648 | err = -EFAULT; |
649 | break; |
650 | |
651 | case SHM_INFO: |
652 | p = compat_alloc_user_space(sizeof(struct shm_info)); |
653 | err = sys_shmctl(first, second, p); |
654 | if (err < 0) |
655 | break; |
656 | err2 = put_compat_shm_info(p, uptr); |
657 | if (err2) |
658 | err = -EFAULT; |
659 | break; |
660 | |
661 | default: |
662 | err = -EINVAL; |
663 | break; |
664 | } |
665 | return err; |
666 | } |
667 | |
668 | long compat_sys_semtimedop(int semid, struct sembuf __user *tsems, |
669 | unsigned nsops, const struct compat_timespec __user *timeout) |
670 | { |
671 | struct timespec __user *ts64 = NULL; |
672 | if (timeout) { |
673 | struct timespec ts; |
674 | ts64 = compat_alloc_user_space(sizeof(*ts64)); |
675 | if (get_compat_timespec(&ts, timeout)) |
676 | return -EFAULT; |
677 | if (copy_to_user(ts64, &ts, sizeof(ts))) |
678 | return -EFAULT; |
679 | } |
680 | return sys_semtimedop(semid, tsems, nsops, ts64); |
681 | } |
682 |
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