Commit | Line | Data |
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1da177e4 LT |
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/config.h> | |
25 | #include <linux/errno.h> | |
26 | #include <linux/highuid.h> | |
27 | #include <linux/init.h> | |
28 | #include <linux/msg.h> | |
29 | #include <linux/shm.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/syscalls.h> | |
32 | ||
33 | #include <asm/semaphore.h> | |
34 | #include <asm/uaccess.h> | |
35 | ||
36 | #include "util.h" | |
37 | ||
38 | struct compat_msgbuf { | |
39 | compat_long_t mtype; | |
40 | char mtext[1]; | |
41 | }; | |
42 | ||
43 | struct compat_ipc_perm { | |
44 | key_t key; | |
45 | compat_uid_t uid; | |
46 | compat_gid_t gid; | |
47 | compat_uid_t cuid; | |
48 | compat_gid_t cgid; | |
49 | compat_mode_t mode; | |
50 | unsigned short seq; | |
51 | }; | |
52 | ||
53 | struct compat_semid_ds { | |
54 | struct compat_ipc_perm sem_perm; | |
55 | compat_time_t sem_otime; | |
56 | compat_time_t sem_ctime; | |
57 | compat_uptr_t sem_base; | |
58 | compat_uptr_t sem_pending; | |
59 | compat_uptr_t sem_pending_last; | |
60 | compat_uptr_t undo; | |
61 | unsigned short sem_nsems; | |
62 | }; | |
63 | ||
64 | struct compat_msqid_ds { | |
65 | struct compat_ipc_perm msg_perm; | |
66 | compat_uptr_t msg_first; | |
67 | compat_uptr_t msg_last; | |
68 | compat_time_t msg_stime; | |
69 | compat_time_t msg_rtime; | |
70 | compat_time_t msg_ctime; | |
71 | compat_ulong_t msg_lcbytes; | |
72 | compat_ulong_t msg_lqbytes; | |
73 | unsigned short msg_cbytes; | |
74 | unsigned short msg_qnum; | |
75 | unsigned short msg_qbytes; | |
76 | compat_ipc_pid_t msg_lspid; | |
77 | compat_ipc_pid_t msg_lrpid; | |
78 | }; | |
79 | ||
80 | struct compat_shmid_ds { | |
81 | struct compat_ipc_perm shm_perm; | |
82 | int shm_segsz; | |
83 | compat_time_t shm_atime; | |
84 | compat_time_t shm_dtime; | |
85 | compat_time_t shm_ctime; | |
86 | compat_ipc_pid_t shm_cpid; | |
87 | compat_ipc_pid_t shm_lpid; | |
88 | unsigned short shm_nattch; | |
89 | unsigned short shm_unused; | |
90 | compat_uptr_t shm_unused2; | |
91 | compat_uptr_t shm_unused3; | |
92 | }; | |
93 | ||
94 | struct compat_ipc_kludge { | |
95 | compat_uptr_t msgp; | |
96 | compat_long_t msgtyp; | |
97 | }; | |
98 | ||
99 | struct compat_shminfo64 { | |
100 | compat_ulong_t shmmax; | |
101 | compat_ulong_t shmmin; | |
102 | compat_ulong_t shmmni; | |
103 | compat_ulong_t shmseg; | |
104 | compat_ulong_t shmall; | |
105 | compat_ulong_t __unused1; | |
106 | compat_ulong_t __unused2; | |
107 | compat_ulong_t __unused3; | |
108 | compat_ulong_t __unused4; | |
109 | }; | |
110 | ||
111 | struct compat_shm_info { | |
112 | compat_int_t used_ids; | |
113 | compat_ulong_t shm_tot, shm_rss, shm_swp; | |
114 | compat_ulong_t swap_attempts, swap_successes; | |
115 | }; | |
116 | ||
117 | extern int sem_ctls[]; | |
118 | #define sc_semopm (sem_ctls[2]) | |
119 | #define MAXBUF (64*1024) | |
120 | ||
121 | static inline int compat_ipc_parse_version(int *cmd) | |
122 | { | |
123 | int version = *cmd & IPC_64; | |
124 | ||
125 | /* this is tricky: architectures that have support for the old | |
126 | * ipc structures in 64 bit binaries need to have IPC_64 set | |
127 | * in cmd, the others need to have it cleared */ | |
128 | #ifndef ipc_parse_version | |
129 | *cmd |= IPC_64; | |
130 | #else | |
131 | *cmd &= ~IPC_64; | |
132 | #endif | |
133 | return version; | |
134 | } | |
135 | ||
136 | static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64, | |
137 | struct compat_ipc64_perm __user *up64) | |
138 | { | |
139 | int err; | |
140 | ||
141 | err = __get_user(p64->uid, &up64->uid); | |
142 | err |= __get_user(p64->gid, &up64->gid); | |
143 | err |= __get_user(p64->mode, &up64->mode); | |
144 | return err; | |
145 | } | |
146 | ||
147 | static inline int __get_compat_ipc_perm(struct ipc64_perm *p, | |
148 | struct compat_ipc_perm __user *up) | |
149 | { | |
150 | int err; | |
151 | ||
152 | err = __get_user(p->uid, &up->uid); | |
153 | err |= __get_user(p->gid, &up->gid); | |
154 | err |= __get_user(p->mode, &up->mode); | |
155 | return err; | |
156 | } | |
157 | ||
158 | static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64, | |
159 | struct compat_ipc64_perm __user *up64) | |
160 | { | |
161 | int err; | |
162 | ||
163 | err = __put_user(p64->key, &up64->key); | |
164 | err |= __put_user(p64->uid, &up64->uid); | |
165 | err |= __put_user(p64->gid, &up64->gid); | |
166 | err |= __put_user(p64->cuid, &up64->cuid); | |
167 | err |= __put_user(p64->cgid, &up64->cgid); | |
168 | err |= __put_user(p64->mode, &up64->mode); | |
169 | err |= __put_user(p64->seq, &up64->seq); | |
170 | return err; | |
171 | } | |
172 | ||
173 | static inline int __put_compat_ipc_perm(struct ipc64_perm *p, | |
174 | struct compat_ipc_perm __user *up) | |
175 | { | |
176 | int err; | |
177 | compat_uid_t u; | |
178 | compat_gid_t g; | |
179 | ||
180 | err = __put_user(p->key, &up->key); | |
181 | SET_UID(u, p->uid); | |
182 | err |= __put_user(u, &up->uid); | |
183 | SET_GID(g, p->gid); | |
184 | err |= __put_user(g, &up->gid); | |
185 | SET_UID(u, p->cuid); | |
186 | err |= __put_user(u, &up->cuid); | |
187 | SET_GID(g, p->cgid); | |
188 | err |= __put_user(g, &up->cgid); | |
189 | err |= __put_user(p->mode, &up->mode); | |
190 | err |= __put_user(p->seq, &up->seq); | |
191 | return err; | |
192 | } | |
193 | ||
194 | static inline int get_compat_semid64_ds(struct semid64_ds *s64, | |
195 | struct compat_semid64_ds __user *up64) | |
196 | { | |
197 | if (!access_ok (VERIFY_READ, up64, sizeof(*up64))) | |
198 | return -EFAULT; | |
199 | return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm); | |
200 | } | |
201 | ||
202 | static inline int get_compat_semid_ds(struct semid64_ds *s, | |
203 | struct compat_semid_ds __user *up) | |
204 | { | |
205 | if (!access_ok (VERIFY_READ, up, sizeof(*up))) | |
206 | return -EFAULT; | |
207 | return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm); | |
208 | } | |
209 | ||
210 | static inline int put_compat_semid64_ds(struct semid64_ds *s64, | |
211 | struct compat_semid64_ds __user *up64) | |
212 | { | |
213 | int err; | |
214 | ||
215 | if (!access_ok (VERIFY_WRITE, up64, sizeof(*up64))) | |
216 | return -EFAULT; | |
217 | err = __put_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm); | |
218 | err |= __put_user(s64->sem_otime, &up64->sem_otime); | |
219 | err |= __put_user(s64->sem_ctime, &up64->sem_ctime); | |
220 | err |= __put_user(s64->sem_nsems, &up64->sem_nsems); | |
221 | return err; | |
222 | } | |
223 | ||
224 | static inline int put_compat_semid_ds(struct semid64_ds *s, | |
225 | struct compat_semid_ds __user *up) | |
226 | { | |
227 | int err; | |
228 | ||
229 | if (!access_ok (VERIFY_WRITE, up, sizeof(*up))) | |
230 | err = -EFAULT; | |
231 | err = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm); | |
232 | err |= __put_user(s->sem_otime, &up->sem_otime); | |
233 | err |= __put_user(s->sem_ctime, &up->sem_ctime); | |
234 | err |= __put_user(s->sem_nsems, &up->sem_nsems); | |
235 | return err; | |
236 | } | |
237 | ||
238 | long compat_sys_semctl(int first, int second, int third, void __user *uptr) | |
239 | { | |
240 | union semun fourth; | |
241 | u32 pad; | |
242 | int err, err2; | |
243 | struct semid64_ds s64; | |
244 | struct semid64_ds __user *up64; | |
245 | int version = compat_ipc_parse_version(&third); | |
246 | ||
247 | if (!uptr) | |
248 | return -EINVAL; | |
249 | if (get_user(pad, (u32 __user *) uptr)) | |
250 | return -EFAULT; | |
251 | if ((third & (~IPC_64)) == SETVAL) | |
252 | fourth.val = (int) pad; | |
253 | else | |
254 | fourth.__pad = compat_ptr(pad); | |
255 | switch (third & (~IPC_64)) { | |
256 | case IPC_INFO: | |
257 | case IPC_RMID: | |
258 | case SEM_INFO: | |
259 | case GETVAL: | |
260 | case GETPID: | |
261 | case GETNCNT: | |
262 | case GETZCNT: | |
263 | case GETALL: | |
264 | case SETVAL: | |
265 | case SETALL: | |
266 | err = sys_semctl(first, second, third, fourth); | |
267 | break; | |
268 | ||
269 | case IPC_STAT: | |
270 | case SEM_STAT: | |
271 | up64 = compat_alloc_user_space(sizeof(s64)); | |
272 | fourth.__pad = up64; | |
273 | err = sys_semctl(first, second, third, fourth); | |
274 | if (err < 0) | |
275 | break; | |
276 | if (copy_from_user(&s64, up64, sizeof(s64))) | |
277 | err2 = -EFAULT; | |
278 | else if (version == IPC_64) | |
279 | err2 = put_compat_semid64_ds(&s64, compat_ptr(pad)); | |
280 | else | |
281 | err2 = put_compat_semid_ds(&s64, compat_ptr(pad)); | |
282 | if (err2) | |
283 | err = -EFAULT; | |
284 | break; | |
285 | ||
286 | case IPC_SET: | |
287 | if (version == IPC_64) { | |
288 | err = get_compat_semid64_ds(&s64, compat_ptr(pad)); | |
289 | } else { | |
290 | err = get_compat_semid_ds(&s64, compat_ptr(pad)); | |
291 | } | |
292 | up64 = compat_alloc_user_space(sizeof(s64)); | |
293 | if (copy_to_user(up64, &s64, sizeof(s64))) | |
294 | err = -EFAULT; | |
295 | if (err) | |
296 | break; | |
297 | ||
298 | fourth.__pad = up64; | |
299 | err = sys_semctl(first, second, third, fourth); | |
300 | break; | |
301 | ||
302 | default: | |
303 | err = -EINVAL; | |
304 | break; | |
305 | } | |
306 | return err; | |
307 | } | |
308 | ||
309 | long compat_sys_msgsnd(int first, int second, int third, void __user *uptr) | |
310 | { | |
311 | struct msgbuf __user *p; | |
312 | struct compat_msgbuf __user *up = uptr; | |
313 | long type; | |
314 | ||
315 | if (first < 0) | |
316 | return -EINVAL; | |
317 | if (second < 0 || (second >= MAXBUF - sizeof(struct msgbuf))) | |
318 | return -EINVAL; | |
319 | ||
320 | p = compat_alloc_user_space(second + sizeof(struct msgbuf)); | |
321 | if (get_user(type, &up->mtype) || | |
322 | put_user(type, &p->mtype) || | |
323 | copy_in_user(p->mtext, up->mtext, second)) | |
324 | return -EFAULT; | |
325 | ||
326 | return sys_msgsnd(first, p, second, third); | |
327 | } | |
328 | ||
329 | long compat_sys_msgrcv(int first, int second, int msgtyp, int third, | |
330 | int version, void __user *uptr) | |
331 | { | |
332 | struct msgbuf __user *p; | |
333 | struct compat_msgbuf __user *up; | |
334 | long type; | |
335 | int err; | |
336 | ||
337 | if (first < 0) | |
338 | return -EINVAL; | |
339 | if (second < 0 || (second >= MAXBUF - sizeof(struct msgbuf))) | |
340 | return -EINVAL; | |
341 | ||
342 | if (!version) { | |
343 | struct compat_ipc_kludge ipck; | |
344 | err = -EINVAL; | |
345 | if (!uptr) | |
346 | goto out; | |
347 | err = -EFAULT; | |
348 | if (copy_from_user (&ipck, uptr, sizeof(ipck))) | |
349 | goto out; | |
350 | uptr = compat_ptr(ipck.msgp); | |
351 | msgtyp = ipck.msgtyp; | |
352 | } | |
353 | p = compat_alloc_user_space(second + sizeof(struct msgbuf)); | |
354 | err = sys_msgrcv(first, p, second, msgtyp, third); | |
355 | if (err < 0) | |
356 | goto out; | |
357 | up = uptr; | |
358 | if (get_user(type, &p->mtype) || | |
359 | put_user(type, &up->mtype) || | |
360 | copy_in_user(up->mtext, p->mtext, err)) | |
361 | err = -EFAULT; | |
362 | out: | |
363 | return err; | |
364 | } | |
365 | ||
366 | static inline int get_compat_msqid64(struct msqid64_ds *m64, | |
367 | struct compat_msqid64_ds __user *up64) | |
368 | { | |
369 | int err; | |
370 | ||
371 | if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) | |
372 | return -EFAULT; | |
373 | err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); | |
374 | err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes); | |
375 | return err; | |
376 | } | |
377 | ||
378 | static inline int get_compat_msqid(struct msqid64_ds *m, | |
379 | struct compat_msqid_ds __user *up) | |
380 | { | |
381 | int err; | |
382 | ||
383 | if (!access_ok(VERIFY_READ, up, sizeof(*up))) | |
384 | return -EFAULT; | |
385 | err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm); | |
386 | err |= __get_user(m->msg_qbytes, &up->msg_qbytes); | |
387 | return err; | |
388 | } | |
389 | ||
390 | static inline int put_compat_msqid64_ds(struct msqid64_ds *m64, | |
391 | struct compat_msqid64_ds __user *up64) | |
392 | { | |
393 | int err; | |
394 | ||
395 | if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) | |
396 | return -EFAULT; | |
397 | err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); | |
398 | err |= __put_user(m64->msg_stime, &up64->msg_stime); | |
399 | err |= __put_user(m64->msg_rtime, &up64->msg_rtime); | |
400 | err |= __put_user(m64->msg_ctime, &up64->msg_ctime); | |
401 | err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes); | |
402 | err |= __put_user(m64->msg_qnum, &up64->msg_qnum); | |
403 | err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes); | |
404 | err |= __put_user(m64->msg_lspid, &up64->msg_lspid); | |
405 | err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid); | |
406 | return err; | |
407 | } | |
408 | ||
409 | static inline int put_compat_msqid_ds(struct msqid64_ds *m, | |
410 | struct compat_msqid_ds __user *up) | |
411 | { | |
412 | int err; | |
413 | ||
414 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) | |
415 | return -EFAULT; | |
416 | err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm); | |
417 | err |= __put_user(m->msg_stime, &up->msg_stime); | |
418 | err |= __put_user(m->msg_rtime, &up->msg_rtime); | |
419 | err |= __put_user(m->msg_ctime, &up->msg_ctime); | |
420 | err |= __put_user(m->msg_cbytes, &up->msg_cbytes); | |
421 | err |= __put_user(m->msg_qnum, &up->msg_qnum); | |
422 | err |= __put_user(m->msg_qbytes, &up->msg_qbytes); | |
423 | err |= __put_user(m->msg_lspid, &up->msg_lspid); | |
424 | err |= __put_user(m->msg_lrpid, &up->msg_lrpid); | |
425 | return err; | |
426 | } | |
427 | ||
428 | long compat_sys_msgctl(int first, int second, void __user *uptr) | |
429 | { | |
430 | int err, err2; | |
431 | struct msqid64_ds m64; | |
432 | int version = compat_ipc_parse_version(&second); | |
433 | void __user *p; | |
434 | ||
435 | switch (second & (~IPC_64)) { | |
436 | case IPC_INFO: | |
437 | case IPC_RMID: | |
438 | case MSG_INFO: | |
439 | err = sys_msgctl(first, second, uptr); | |
440 | break; | |
441 | ||
442 | case IPC_SET: | |
443 | if (version == IPC_64) { | |
444 | err = get_compat_msqid64(&m64, uptr); | |
445 | } else { | |
446 | err = get_compat_msqid(&m64, uptr); | |
447 | } | |
448 | if (err) | |
449 | break; | |
450 | p = compat_alloc_user_space(sizeof(m64)); | |
451 | if (copy_to_user(p, &m64, sizeof(m64))) | |
452 | err = -EFAULT; | |
453 | else | |
454 | err = sys_msgctl(first, second, p); | |
455 | break; | |
456 | ||
457 | case IPC_STAT: | |
458 | case MSG_STAT: | |
459 | p = compat_alloc_user_space(sizeof(m64)); | |
460 | err = sys_msgctl(first, second, p); | |
461 | if (err < 0) | |
462 | break; | |
463 | if (copy_from_user(&m64, p, sizeof(m64))) | |
464 | err2 = -EFAULT; | |
465 | else if (version == IPC_64) | |
466 | err2 = put_compat_msqid64_ds(&m64, uptr); | |
467 | else | |
468 | err2 = put_compat_msqid_ds(&m64, uptr); | |
469 | if (err2) | |
470 | err = -EFAULT; | |
471 | break; | |
472 | ||
473 | default: | |
474 | err = -EINVAL; | |
475 | break; | |
476 | } | |
477 | return err; | |
478 | } | |
479 | ||
480 | long compat_sys_shmat(int first, int second, compat_uptr_t third, int version, | |
481 | void __user *uptr) | |
482 | { | |
483 | int err; | |
484 | unsigned long raddr; | |
485 | compat_ulong_t __user *uaddr; | |
486 | ||
487 | if (version == 1) | |
488 | return -EINVAL; | |
489 | err = do_shmat(first, uptr, second, &raddr); | |
490 | if (err < 0) | |
491 | return err; | |
492 | uaddr = compat_ptr(third); | |
493 | return put_user(raddr, uaddr); | |
494 | } | |
495 | ||
496 | static inline int get_compat_shmid64_ds(struct shmid64_ds *s64, | |
497 | struct compat_shmid64_ds __user *up64) | |
498 | { | |
499 | if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) | |
500 | return -EFAULT; | |
501 | return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); | |
502 | } | |
503 | ||
504 | static inline int get_compat_shmid_ds(struct shmid64_ds *s, | |
505 | struct compat_shmid_ds __user *up) | |
506 | { | |
507 | if (!access_ok(VERIFY_READ, up, sizeof(*up))) | |
508 | return -EFAULT; | |
509 | return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm); | |
510 | } | |
511 | ||
512 | static inline int put_compat_shmid64_ds(struct shmid64_ds *s64, | |
513 | struct compat_shmid64_ds __user *up64) | |
514 | { | |
515 | int err; | |
516 | ||
517 | if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) | |
518 | return -EFAULT; | |
519 | err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); | |
520 | err |= __put_user(s64->shm_atime, &up64->shm_atime); | |
521 | err |= __put_user(s64->shm_dtime, &up64->shm_dtime); | |
522 | err |= __put_user(s64->shm_ctime, &up64->shm_ctime); | |
523 | err |= __put_user(s64->shm_segsz, &up64->shm_segsz); | |
524 | err |= __put_user(s64->shm_nattch, &up64->shm_nattch); | |
525 | err |= __put_user(s64->shm_cpid, &up64->shm_cpid); | |
526 | err |= __put_user(s64->shm_lpid, &up64->shm_lpid); | |
527 | return err; | |
528 | } | |
529 | ||
530 | static inline int put_compat_shmid_ds(struct shmid64_ds *s, | |
531 | struct compat_shmid_ds __user *up) | |
532 | { | |
533 | int err; | |
534 | ||
535 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) | |
536 | return -EFAULT; | |
537 | err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm); | |
538 | err |= __put_user(s->shm_atime, &up->shm_atime); | |
539 | err |= __put_user(s->shm_dtime, &up->shm_dtime); | |
540 | err |= __put_user(s->shm_ctime, &up->shm_ctime); | |
541 | err |= __put_user(s->shm_segsz, &up->shm_segsz); | |
542 | err |= __put_user(s->shm_nattch, &up->shm_nattch); | |
543 | err |= __put_user(s->shm_cpid, &up->shm_cpid); | |
544 | err |= __put_user(s->shm_lpid, &up->shm_lpid); | |
545 | return err; | |
546 | } | |
547 | ||
548 | static inline int put_compat_shminfo64(struct shminfo64 *smi, | |
549 | struct compat_shminfo64 __user *up64) | |
550 | { | |
551 | int err; | |
552 | ||
553 | if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) | |
554 | return -EFAULT; | |
555 | err = __put_user(smi->shmmax, &up64->shmmax); | |
556 | err |= __put_user(smi->shmmin, &up64->shmmin); | |
557 | err |= __put_user(smi->shmmni, &up64->shmmni); | |
558 | err |= __put_user(smi->shmseg, &up64->shmseg); | |
559 | err |= __put_user(smi->shmall, &up64->shmall); | |
560 | return err; | |
561 | } | |
562 | ||
563 | static inline int put_compat_shminfo(struct shminfo64 *smi, | |
564 | struct shminfo __user *up) | |
565 | { | |
566 | int err; | |
567 | ||
568 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) | |
569 | return -EFAULT; | |
570 | err = __put_user(smi->shmmax, &up->shmmax); | |
571 | err |= __put_user(smi->shmmin, &up->shmmin); | |
572 | err |= __put_user(smi->shmmni, &up->shmmni); | |
573 | err |= __put_user(smi->shmseg, &up->shmseg); | |
574 | err |= __put_user(smi->shmall, &up->shmall); | |
214a627c | 575 | return err; |
1da177e4 LT |
576 | } |
577 | ||
578 | static inline int put_compat_shm_info(struct shm_info __user *ip, | |
579 | struct compat_shm_info __user *uip) | |
580 | { | |
581 | int err; | |
582 | struct shm_info si; | |
583 | ||
584 | if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) || | |
585 | copy_from_user(&si, ip, sizeof(si))) | |
586 | return -EFAULT; | |
587 | err = __put_user(si.used_ids, &uip->used_ids); | |
588 | err |= __put_user(si.shm_tot, &uip->shm_tot); | |
589 | err |= __put_user(si.shm_rss, &uip->shm_rss); | |
590 | err |= __put_user(si.shm_swp, &uip->shm_swp); | |
591 | err |= __put_user(si.swap_attempts, &uip->swap_attempts); | |
592 | err |= __put_user(si.swap_successes, &uip->swap_successes); | |
593 | return err; | |
594 | } | |
595 | ||
596 | long compat_sys_shmctl(int first, int second, void __user *uptr) | |
597 | { | |
598 | void __user *p; | |
599 | struct shmid64_ds s64; | |
600 | struct shminfo64 smi; | |
601 | int err, err2; | |
602 | int version = compat_ipc_parse_version(&second); | |
603 | ||
604 | switch (second & (~IPC_64)) { | |
605 | case IPC_RMID: | |
606 | case SHM_LOCK: | |
607 | case SHM_UNLOCK: | |
608 | err = sys_shmctl(first, second, uptr); | |
609 | break; | |
610 | ||
611 | case IPC_INFO: | |
612 | p = compat_alloc_user_space(sizeof(smi)); | |
613 | err = sys_shmctl(first, second, p); | |
614 | if (err < 0) | |
615 | break; | |
616 | if (copy_from_user(&smi, p, sizeof(smi))) | |
617 | err2 = -EFAULT; | |
618 | else if (version == IPC_64) | |
619 | err2 = put_compat_shminfo64(&smi, uptr); | |
620 | else | |
621 | err2 = put_compat_shminfo(&smi, uptr); | |
622 | if (err2) | |
623 | err = -EFAULT; | |
624 | break; | |
625 | ||
626 | ||
627 | case IPC_SET: | |
628 | if (version == IPC_64) { | |
629 | err = get_compat_shmid64_ds(&s64, uptr); | |
630 | } else { | |
631 | err = get_compat_shmid_ds(&s64, uptr); | |
632 | } | |
633 | if (err) | |
634 | break; | |
635 | p = compat_alloc_user_space(sizeof(s64)); | |
636 | if (copy_to_user(p, &s64, sizeof(s64))) | |
637 | err = -EFAULT; | |
638 | else | |
639 | err = sys_shmctl(first, second, p); | |
640 | break; | |
641 | ||
642 | case IPC_STAT: | |
643 | case SHM_STAT: | |
644 | p = compat_alloc_user_space(sizeof(s64)); | |
645 | err = sys_shmctl(first, second, p); | |
646 | if (err < 0) | |
647 | break; | |
648 | if (copy_from_user(&s64, p, sizeof(s64))) | |
649 | err2 = -EFAULT; | |
650 | else if (version == IPC_64) | |
651 | err2 = put_compat_shmid64_ds(&s64, uptr); | |
652 | else | |
653 | err2 = put_compat_shmid_ds(&s64, uptr); | |
654 | if (err2) | |
655 | err = -EFAULT; | |
656 | break; | |
657 | ||
658 | case SHM_INFO: | |
659 | p = compat_alloc_user_space(sizeof(struct shm_info)); | |
660 | err = sys_shmctl(first, second, p); | |
661 | if (err < 0) | |
662 | break; | |
663 | err2 = put_compat_shm_info(p, uptr); | |
664 | if (err2) | |
665 | err = -EFAULT; | |
666 | break; | |
667 | ||
668 | default: | |
669 | err = -EINVAL; | |
670 | break; | |
671 | } | |
672 | return err; | |
673 | } | |
674 | ||
675 | long compat_sys_semtimedop(int semid, struct sembuf __user *tsems, | |
676 | unsigned nsops, const struct compat_timespec __user *timeout) | |
677 | { | |
678 | struct timespec __user *ts64 = NULL; | |
679 | if (timeout) { | |
680 | struct timespec ts; | |
681 | ts64 = compat_alloc_user_space(sizeof(*ts64)); | |
682 | if (get_compat_timespec(&ts, timeout)) | |
683 | return -EFAULT; | |
684 | if (copy_to_user(ts64, &ts, sizeof(ts))) | |
685 | return -EFAULT; | |
686 | } | |
687 | return sys_semtimedop(semid, tsems, nsops, ts64); | |
688 | } |