]>
Commit | Line | Data |
---|---|---|
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> | |
1da177e4 LT |
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> | |
1da177e4 | 29 | #include <linux/syscalls.h> |
48b25c43 | 30 | #include <linux/ptrace.h> |
1da177e4 | 31 | |
5f921ae9 | 32 | #include <linux/mutex.h> |
1da177e4 LT |
33 | #include <asm/uaccess.h> |
34 | ||
35 | #include "util.h" | |
36 | ||
37 | struct compat_msgbuf { | |
38 | compat_long_t mtype; | |
39 | char mtext[1]; | |
40 | }; | |
41 | ||
42 | struct compat_ipc_perm { | |
43 | key_t key; | |
202e5979 SR |
44 | __compat_uid_t uid; |
45 | __compat_gid_t gid; | |
46 | __compat_uid_t cuid; | |
47 | __compat_gid_t cgid; | |
1da177e4 LT |
48 | compat_mode_t mode; |
49 | unsigned short seq; | |
50 | }; | |
51 | ||
52 | struct compat_semid_ds { | |
53 | struct compat_ipc_perm sem_perm; | |
54 | compat_time_t sem_otime; | |
55 | compat_time_t sem_ctime; | |
56 | compat_uptr_t sem_base; | |
57 | compat_uptr_t sem_pending; | |
58 | compat_uptr_t sem_pending_last; | |
59 | compat_uptr_t undo; | |
60 | unsigned short sem_nsems; | |
61 | }; | |
62 | ||
63 | struct compat_msqid_ds { | |
64 | struct compat_ipc_perm msg_perm; | |
65 | compat_uptr_t msg_first; | |
66 | compat_uptr_t msg_last; | |
67 | compat_time_t msg_stime; | |
68 | compat_time_t msg_rtime; | |
69 | compat_time_t msg_ctime; | |
70 | compat_ulong_t msg_lcbytes; | |
71 | compat_ulong_t msg_lqbytes; | |
72 | unsigned short msg_cbytes; | |
73 | unsigned short msg_qnum; | |
74 | unsigned short msg_qbytes; | |
75 | compat_ipc_pid_t msg_lspid; | |
76 | compat_ipc_pid_t msg_lrpid; | |
77 | }; | |
78 | ||
79 | struct compat_shmid_ds { | |
80 | struct compat_ipc_perm shm_perm; | |
81 | int shm_segsz; | |
82 | compat_time_t shm_atime; | |
83 | compat_time_t shm_dtime; | |
84 | compat_time_t shm_ctime; | |
85 | compat_ipc_pid_t shm_cpid; | |
86 | compat_ipc_pid_t shm_lpid; | |
87 | unsigned short shm_nattch; | |
88 | unsigned short shm_unused; | |
89 | compat_uptr_t shm_unused2; | |
90 | compat_uptr_t shm_unused3; | |
91 | }; | |
92 | ||
93 | struct compat_ipc_kludge { | |
94 | compat_uptr_t msgp; | |
95 | compat_long_t msgtyp; | |
96 | }; | |
97 | ||
98 | struct compat_shminfo64 { | |
99 | compat_ulong_t shmmax; | |
100 | compat_ulong_t shmmin; | |
101 | compat_ulong_t shmmni; | |
102 | compat_ulong_t shmseg; | |
103 | compat_ulong_t shmall; | |
104 | compat_ulong_t __unused1; | |
105 | compat_ulong_t __unused2; | |
106 | compat_ulong_t __unused3; | |
107 | compat_ulong_t __unused4; | |
108 | }; | |
109 | ||
110 | struct compat_shm_info { | |
111 | compat_int_t used_ids; | |
112 | compat_ulong_t shm_tot, shm_rss, shm_swp; | |
113 | compat_ulong_t swap_attempts, swap_successes; | |
114 | }; | |
115 | ||
116 | extern int sem_ctls[]; | |
117 | #define sc_semopm (sem_ctls[2]) | |
1da177e4 LT |
118 | |
119 | static inline int compat_ipc_parse_version(int *cmd) | |
120 | { | |
c1d7e01d | 121 | #ifdef CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION |
1da177e4 LT |
122 | int version = *cmd & IPC_64; |
123 | ||
124 | /* this is tricky: architectures that have support for the old | |
125 | * ipc structures in 64 bit binaries need to have IPC_64 set | |
126 | * in cmd, the others need to have it cleared */ | |
127 | #ifndef ipc_parse_version | |
128 | *cmd |= IPC_64; | |
129 | #else | |
130 | *cmd &= ~IPC_64; | |
131 | #endif | |
132 | return version; | |
48b25c43 CM |
133 | #else |
134 | /* With the asm-generic APIs, we always use the 64-bit versions. */ | |
135 | return IPC_64; | |
136 | #endif | |
1da177e4 LT |
137 | } |
138 | ||
139 | static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64, | |
140 | struct compat_ipc64_perm __user *up64) | |
141 | { | |
142 | int err; | |
143 | ||
144 | err = __get_user(p64->uid, &up64->uid); | |
145 | err |= __get_user(p64->gid, &up64->gid); | |
146 | err |= __get_user(p64->mode, &up64->mode); | |
147 | return err; | |
148 | } | |
149 | ||
150 | static inline int __get_compat_ipc_perm(struct ipc64_perm *p, | |
151 | struct compat_ipc_perm __user *up) | |
152 | { | |
153 | int err; | |
154 | ||
155 | err = __get_user(p->uid, &up->uid); | |
156 | err |= __get_user(p->gid, &up->gid); | |
157 | err |= __get_user(p->mode, &up->mode); | |
158 | return err; | |
159 | } | |
160 | ||
161 | static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64, | |
162 | struct compat_ipc64_perm __user *up64) | |
163 | { | |
164 | int err; | |
165 | ||
166 | err = __put_user(p64->key, &up64->key); | |
167 | err |= __put_user(p64->uid, &up64->uid); | |
168 | err |= __put_user(p64->gid, &up64->gid); | |
169 | err |= __put_user(p64->cuid, &up64->cuid); | |
170 | err |= __put_user(p64->cgid, &up64->cgid); | |
171 | err |= __put_user(p64->mode, &up64->mode); | |
172 | err |= __put_user(p64->seq, &up64->seq); | |
173 | return err; | |
174 | } | |
175 | ||
176 | static inline int __put_compat_ipc_perm(struct ipc64_perm *p, | |
177 | struct compat_ipc_perm __user *up) | |
178 | { | |
179 | int err; | |
202e5979 SR |
180 | __compat_uid_t u; |
181 | __compat_gid_t g; | |
1da177e4 LT |
182 | |
183 | err = __put_user(p->key, &up->key); | |
184 | SET_UID(u, p->uid); | |
185 | err |= __put_user(u, &up->uid); | |
186 | SET_GID(g, p->gid); | |
187 | err |= __put_user(g, &up->gid); | |
188 | SET_UID(u, p->cuid); | |
189 | err |= __put_user(u, &up->cuid); | |
190 | SET_GID(g, p->cgid); | |
191 | err |= __put_user(g, &up->cgid); | |
192 | err |= __put_user(p->mode, &up->mode); | |
193 | err |= __put_user(p->seq, &up->seq); | |
194 | return err; | |
195 | } | |
196 | ||
197 | static inline int get_compat_semid64_ds(struct semid64_ds *s64, | |
198 | struct compat_semid64_ds __user *up64) | |
199 | { | |
200 | if (!access_ok (VERIFY_READ, up64, sizeof(*up64))) | |
201 | return -EFAULT; | |
202 | return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm); | |
203 | } | |
204 | ||
205 | static inline int get_compat_semid_ds(struct semid64_ds *s, | |
206 | struct compat_semid_ds __user *up) | |
207 | { | |
208 | if (!access_ok (VERIFY_READ, up, sizeof(*up))) | |
209 | return -EFAULT; | |
210 | return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm); | |
211 | } | |
212 | ||
213 | static inline int put_compat_semid64_ds(struct semid64_ds *s64, | |
214 | struct compat_semid64_ds __user *up64) | |
215 | { | |
216 | int err; | |
217 | ||
218 | if (!access_ok (VERIFY_WRITE, up64, sizeof(*up64))) | |
219 | return -EFAULT; | |
220 | err = __put_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm); | |
221 | err |= __put_user(s64->sem_otime, &up64->sem_otime); | |
222 | err |= __put_user(s64->sem_ctime, &up64->sem_ctime); | |
223 | err |= __put_user(s64->sem_nsems, &up64->sem_nsems); | |
224 | return err; | |
225 | } | |
226 | ||
227 | static inline int put_compat_semid_ds(struct semid64_ds *s, | |
228 | struct compat_semid_ds __user *up) | |
229 | { | |
230 | int err; | |
231 | ||
232 | if (!access_ok (VERIFY_WRITE, up, sizeof(*up))) | |
d57d9731 | 233 | return -EFAULT; |
1da177e4 LT |
234 | err = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm); |
235 | err |= __put_user(s->sem_otime, &up->sem_otime); | |
236 | err |= __put_user(s->sem_ctime, &up->sem_ctime); | |
237 | err |= __put_user(s->sem_nsems, &up->sem_nsems); | |
238 | return err; | |
239 | } | |
240 | ||
48b25c43 | 241 | static long do_compat_semctl(int first, int second, int third, u32 pad) |
1da177e4 LT |
242 | { |
243 | union semun fourth; | |
1da177e4 LT |
244 | int err, err2; |
245 | struct semid64_ds s64; | |
246 | struct semid64_ds __user *up64; | |
247 | int version = compat_ipc_parse_version(&third); | |
248 | ||
03145beb DR |
249 | memset(&s64, 0, sizeof(s64)); |
250 | ||
1da177e4 LT |
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 | ||
f9dd87f4 SK |
309 | long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz) |
310 | { | |
311 | struct compat_msgbuf __user *msgp = dest; | |
312 | size_t msgsz; | |
313 | ||
314 | if (put_user(msg->m_type, &msgp->mtype)) | |
315 | return -EFAULT; | |
316 | ||
317 | msgsz = (bufsz > msg->m_ts) ? msg->m_ts : bufsz; | |
318 | if (store_msg(msgp->mtext, msg, msgsz)) | |
319 | return -EFAULT; | |
320 | return msgsz; | |
321 | } | |
322 | ||
48b25c43 CM |
323 | #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC |
324 | long compat_sys_semctl(int first, int second, int third, void __user *uptr) | |
325 | { | |
326 | u32 pad; | |
327 | ||
328 | if (!uptr) | |
329 | return -EINVAL; | |
330 | if (get_user(pad, (u32 __user *) uptr)) | |
331 | return -EFAULT; | |
332 | return do_compat_semctl(first, second, third, pad); | |
333 | } | |
334 | ||
1da177e4 LT |
335 | long compat_sys_msgsnd(int first, int second, int third, void __user *uptr) |
336 | { | |
1da177e4 LT |
337 | struct compat_msgbuf __user *up = uptr; |
338 | long type; | |
339 | ||
340 | if (first < 0) | |
341 | return -EINVAL; | |
651971cb | 342 | if (second < 0) |
1da177e4 LT |
343 | return -EINVAL; |
344 | ||
651971cb | 345 | if (get_user(type, &up->mtype)) |
1da177e4 LT |
346 | return -EFAULT; |
347 | ||
651971cb | 348 | return do_msgsnd(first, type, up->mtext, second, third); |
1da177e4 LT |
349 | } |
350 | ||
351 | long compat_sys_msgrcv(int first, int second, int msgtyp, int third, | |
352 | int version, void __user *uptr) | |
353 | { | |
1da177e4 LT |
354 | if (first < 0) |
355 | return -EINVAL; | |
651971cb | 356 | if (second < 0) |
1da177e4 LT |
357 | return -EINVAL; |
358 | ||
359 | if (!version) { | |
360 | struct compat_ipc_kludge ipck; | |
1da177e4 | 361 | if (!uptr) |
f9dd87f4 | 362 | return -EINVAL; |
1da177e4 | 363 | if (copy_from_user (&ipck, uptr, sizeof(ipck))) |
f9dd87f4 | 364 | return -EFAULT; |
1da177e4 LT |
365 | uptr = compat_ptr(ipck.msgp); |
366 | msgtyp = ipck.msgtyp; | |
367 | } | |
3a665531 SK |
368 | return do_msgrcv(first, uptr, second, msgtyp, third, |
369 | compat_do_msg_fill); | |
1da177e4 | 370 | } |
56e41d3c AV |
371 | |
372 | COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second, | |
373 | u32, third, compat_uptr_t, ptr, u32, fifth) | |
374 | { | |
375 | int version; | |
376 | ||
377 | version = call >> 16; /* hack for backward compatibility */ | |
378 | call &= 0xffff; | |
379 | ||
380 | switch (call) { | |
381 | case SEMOP: | |
382 | /* struct sembuf is the same on 32 and 64bit :)) */ | |
383 | return sys_semtimedop(first, compat_ptr(ptr), second, NULL); | |
384 | case SEMTIMEDOP: | |
385 | return compat_sys_semtimedop(first, compat_ptr(ptr), second, | |
386 | compat_ptr(fifth)); | |
387 | case SEMGET: | |
388 | return sys_semget(first, second, third); | |
389 | case SEMCTL: | |
390 | return compat_sys_semctl(first, second, third, compat_ptr(ptr)); | |
391 | ||
392 | case MSGSND: | |
393 | return compat_sys_msgsnd(first, second, third, compat_ptr(ptr)); | |
394 | case MSGRCV: | |
395 | return compat_sys_msgrcv(first, second, fifth, third, | |
396 | version, compat_ptr(ptr)); | |
397 | case MSGGET: | |
398 | return sys_msgget(first, second); | |
399 | case MSGCTL: | |
400 | return compat_sys_msgctl(first, second, compat_ptr(ptr)); | |
401 | ||
402 | case SHMAT: | |
403 | return compat_sys_shmat(first, second, third, version, | |
404 | compat_ptr(ptr)); | |
405 | case SHMDT: | |
406 | return sys_shmdt(compat_ptr(ptr)); | |
407 | case SHMGET: | |
408 | return sys_shmget(first, (unsigned)second, third); | |
409 | case SHMCTL: | |
410 | return compat_sys_shmctl(first, second, compat_ptr(ptr)); | |
411 | } | |
412 | ||
413 | return -ENOSYS; | |
414 | } | |
48b25c43 CM |
415 | #else |
416 | long compat_sys_semctl(int semid, int semnum, int cmd, int arg) | |
417 | { | |
418 | return do_compat_semctl(semid, semnum, cmd, arg); | |
419 | } | |
420 | ||
421 | long compat_sys_msgsnd(int msqid, struct compat_msgbuf __user *msgp, | |
05ba3f1a | 422 | compat_ssize_t msgsz, int msgflg) |
48b25c43 CM |
423 | { |
424 | compat_long_t mtype; | |
425 | ||
426 | if (get_user(mtype, &msgp->mtype)) | |
427 | return -EFAULT; | |
05ba3f1a | 428 | return do_msgsnd(msqid, mtype, msgp->mtext, (ssize_t)msgsz, msgflg); |
48b25c43 CM |
429 | } |
430 | ||
431 | long compat_sys_msgrcv(int msqid, struct compat_msgbuf __user *msgp, | |
05ba3f1a | 432 | compat_ssize_t msgsz, long msgtyp, int msgflg) |
48b25c43 | 433 | { |
f9dd87f4 SK |
434 | return do_msgrcv(msqid, msgp, (ssize_t)msgsz, msgtyp, msgflg, |
435 | compat_do_msg_fill); | |
48b25c43 CM |
436 | } |
437 | #endif | |
1da177e4 LT |
438 | |
439 | static inline int get_compat_msqid64(struct msqid64_ds *m64, | |
440 | struct compat_msqid64_ds __user *up64) | |
441 | { | |
442 | int err; | |
443 | ||
444 | if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) | |
445 | return -EFAULT; | |
446 | err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); | |
447 | err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes); | |
448 | return err; | |
449 | } | |
450 | ||
451 | static inline int get_compat_msqid(struct msqid64_ds *m, | |
452 | struct compat_msqid_ds __user *up) | |
453 | { | |
454 | int err; | |
455 | ||
456 | if (!access_ok(VERIFY_READ, up, sizeof(*up))) | |
457 | return -EFAULT; | |
458 | err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm); | |
459 | err |= __get_user(m->msg_qbytes, &up->msg_qbytes); | |
460 | return err; | |
461 | } | |
462 | ||
463 | static inline int put_compat_msqid64_ds(struct msqid64_ds *m64, | |
464 | struct compat_msqid64_ds __user *up64) | |
465 | { | |
466 | int err; | |
467 | ||
468 | if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) | |
469 | return -EFAULT; | |
470 | err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm); | |
471 | err |= __put_user(m64->msg_stime, &up64->msg_stime); | |
472 | err |= __put_user(m64->msg_rtime, &up64->msg_rtime); | |
473 | err |= __put_user(m64->msg_ctime, &up64->msg_ctime); | |
474 | err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes); | |
475 | err |= __put_user(m64->msg_qnum, &up64->msg_qnum); | |
476 | err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes); | |
477 | err |= __put_user(m64->msg_lspid, &up64->msg_lspid); | |
478 | err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid); | |
479 | return err; | |
480 | } | |
481 | ||
482 | static inline int put_compat_msqid_ds(struct msqid64_ds *m, | |
483 | struct compat_msqid_ds __user *up) | |
484 | { | |
485 | int err; | |
486 | ||
487 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) | |
488 | return -EFAULT; | |
489 | err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm); | |
490 | err |= __put_user(m->msg_stime, &up->msg_stime); | |
491 | err |= __put_user(m->msg_rtime, &up->msg_rtime); | |
492 | err |= __put_user(m->msg_ctime, &up->msg_ctime); | |
493 | err |= __put_user(m->msg_cbytes, &up->msg_cbytes); | |
494 | err |= __put_user(m->msg_qnum, &up->msg_qnum); | |
495 | err |= __put_user(m->msg_qbytes, &up->msg_qbytes); | |
496 | err |= __put_user(m->msg_lspid, &up->msg_lspid); | |
497 | err |= __put_user(m->msg_lrpid, &up->msg_lrpid); | |
498 | return err; | |
499 | } | |
500 | ||
501 | long compat_sys_msgctl(int first, int second, void __user *uptr) | |
502 | { | |
503 | int err, err2; | |
504 | struct msqid64_ds m64; | |
505 | int version = compat_ipc_parse_version(&second); | |
506 | void __user *p; | |
507 | ||
03145beb DR |
508 | memset(&m64, 0, sizeof(m64)); |
509 | ||
1da177e4 LT |
510 | switch (second & (~IPC_64)) { |
511 | case IPC_INFO: | |
512 | case IPC_RMID: | |
513 | case MSG_INFO: | |
514 | err = sys_msgctl(first, second, uptr); | |
515 | break; | |
516 | ||
517 | case IPC_SET: | |
518 | if (version == IPC_64) { | |
519 | err = get_compat_msqid64(&m64, uptr); | |
520 | } else { | |
521 | err = get_compat_msqid(&m64, uptr); | |
522 | } | |
523 | if (err) | |
524 | break; | |
525 | p = compat_alloc_user_space(sizeof(m64)); | |
526 | if (copy_to_user(p, &m64, sizeof(m64))) | |
527 | err = -EFAULT; | |
528 | else | |
529 | err = sys_msgctl(first, second, p); | |
530 | break; | |
531 | ||
532 | case IPC_STAT: | |
533 | case MSG_STAT: | |
534 | p = compat_alloc_user_space(sizeof(m64)); | |
535 | err = sys_msgctl(first, second, p); | |
536 | if (err < 0) | |
537 | break; | |
538 | if (copy_from_user(&m64, p, sizeof(m64))) | |
539 | err2 = -EFAULT; | |
540 | else if (version == IPC_64) | |
541 | err2 = put_compat_msqid64_ds(&m64, uptr); | |
542 | else | |
543 | err2 = put_compat_msqid_ds(&m64, uptr); | |
544 | if (err2) | |
545 | err = -EFAULT; | |
546 | break; | |
547 | ||
548 | default: | |
549 | err = -EINVAL; | |
550 | break; | |
551 | } | |
552 | return err; | |
553 | } | |
554 | ||
079a96ae WD |
555 | #ifndef COMPAT_SHMLBA |
556 | #define COMPAT_SHMLBA SHMLBA | |
557 | #endif | |
558 | ||
48b25c43 | 559 | #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC |
1da177e4 LT |
560 | long compat_sys_shmat(int first, int second, compat_uptr_t third, int version, |
561 | void __user *uptr) | |
562 | { | |
563 | int err; | |
564 | unsigned long raddr; | |
565 | compat_ulong_t __user *uaddr; | |
566 | ||
567 | if (version == 1) | |
568 | return -EINVAL; | |
079a96ae | 569 | err = do_shmat(first, uptr, second, &raddr, COMPAT_SHMLBA); |
1da177e4 LT |
570 | if (err < 0) |
571 | return err; | |
572 | uaddr = compat_ptr(third); | |
573 | return put_user(raddr, uaddr); | |
574 | } | |
48b25c43 CM |
575 | #else |
576 | long compat_sys_shmat(int shmid, compat_uptr_t shmaddr, int shmflg) | |
577 | { | |
578 | unsigned long ret; | |
579 | long err; | |
580 | ||
079a96ae | 581 | err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA); |
48b25c43 CM |
582 | if (err) |
583 | return err; | |
584 | force_successful_syscall_return(); | |
585 | return (long)ret; | |
586 | } | |
587 | #endif | |
1da177e4 LT |
588 | |
589 | static inline int get_compat_shmid64_ds(struct shmid64_ds *s64, | |
590 | struct compat_shmid64_ds __user *up64) | |
591 | { | |
592 | if (!access_ok(VERIFY_READ, up64, sizeof(*up64))) | |
593 | return -EFAULT; | |
594 | return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); | |
595 | } | |
596 | ||
597 | static inline int get_compat_shmid_ds(struct shmid64_ds *s, | |
598 | struct compat_shmid_ds __user *up) | |
599 | { | |
600 | if (!access_ok(VERIFY_READ, up, sizeof(*up))) | |
601 | return -EFAULT; | |
602 | return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm); | |
603 | } | |
604 | ||
605 | static inline int put_compat_shmid64_ds(struct shmid64_ds *s64, | |
606 | struct compat_shmid64_ds __user *up64) | |
607 | { | |
608 | int err; | |
609 | ||
610 | if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) | |
611 | return -EFAULT; | |
612 | err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm); | |
613 | err |= __put_user(s64->shm_atime, &up64->shm_atime); | |
614 | err |= __put_user(s64->shm_dtime, &up64->shm_dtime); | |
615 | err |= __put_user(s64->shm_ctime, &up64->shm_ctime); | |
616 | err |= __put_user(s64->shm_segsz, &up64->shm_segsz); | |
617 | err |= __put_user(s64->shm_nattch, &up64->shm_nattch); | |
618 | err |= __put_user(s64->shm_cpid, &up64->shm_cpid); | |
619 | err |= __put_user(s64->shm_lpid, &up64->shm_lpid); | |
620 | return err; | |
621 | } | |
622 | ||
623 | static inline int put_compat_shmid_ds(struct shmid64_ds *s, | |
624 | struct compat_shmid_ds __user *up) | |
625 | { | |
626 | int err; | |
627 | ||
628 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) | |
629 | return -EFAULT; | |
630 | err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm); | |
631 | err |= __put_user(s->shm_atime, &up->shm_atime); | |
632 | err |= __put_user(s->shm_dtime, &up->shm_dtime); | |
633 | err |= __put_user(s->shm_ctime, &up->shm_ctime); | |
634 | err |= __put_user(s->shm_segsz, &up->shm_segsz); | |
635 | err |= __put_user(s->shm_nattch, &up->shm_nattch); | |
636 | err |= __put_user(s->shm_cpid, &up->shm_cpid); | |
637 | err |= __put_user(s->shm_lpid, &up->shm_lpid); | |
638 | return err; | |
639 | } | |
640 | ||
641 | static inline int put_compat_shminfo64(struct shminfo64 *smi, | |
642 | struct compat_shminfo64 __user *up64) | |
643 | { | |
644 | int err; | |
645 | ||
646 | if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64))) | |
647 | return -EFAULT; | |
af7c693f GS |
648 | if (smi->shmmax > INT_MAX) |
649 | smi->shmmax = INT_MAX; | |
1da177e4 LT |
650 | err = __put_user(smi->shmmax, &up64->shmmax); |
651 | err |= __put_user(smi->shmmin, &up64->shmmin); | |
652 | err |= __put_user(smi->shmmni, &up64->shmmni); | |
653 | err |= __put_user(smi->shmseg, &up64->shmseg); | |
654 | err |= __put_user(smi->shmall, &up64->shmall); | |
655 | return err; | |
656 | } | |
657 | ||
658 | static inline int put_compat_shminfo(struct shminfo64 *smi, | |
659 | struct shminfo __user *up) | |
660 | { | |
661 | int err; | |
662 | ||
663 | if (!access_ok(VERIFY_WRITE, up, sizeof(*up))) | |
664 | return -EFAULT; | |
af7c693f GS |
665 | if (smi->shmmax > INT_MAX) |
666 | smi->shmmax = INT_MAX; | |
1da177e4 LT |
667 | err = __put_user(smi->shmmax, &up->shmmax); |
668 | err |= __put_user(smi->shmmin, &up->shmmin); | |
669 | err |= __put_user(smi->shmmni, &up->shmmni); | |
670 | err |= __put_user(smi->shmseg, &up->shmseg); | |
671 | err |= __put_user(smi->shmall, &up->shmall); | |
214a627c | 672 | return err; |
1da177e4 LT |
673 | } |
674 | ||
675 | static inline int put_compat_shm_info(struct shm_info __user *ip, | |
676 | struct compat_shm_info __user *uip) | |
677 | { | |
678 | int err; | |
679 | struct shm_info si; | |
680 | ||
681 | if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) || | |
682 | copy_from_user(&si, ip, sizeof(si))) | |
683 | return -EFAULT; | |
684 | err = __put_user(si.used_ids, &uip->used_ids); | |
685 | err |= __put_user(si.shm_tot, &uip->shm_tot); | |
686 | err |= __put_user(si.shm_rss, &uip->shm_rss); | |
687 | err |= __put_user(si.shm_swp, &uip->shm_swp); | |
688 | err |= __put_user(si.swap_attempts, &uip->swap_attempts); | |
689 | err |= __put_user(si.swap_successes, &uip->swap_successes); | |
690 | return err; | |
691 | } | |
692 | ||
693 | long compat_sys_shmctl(int first, int second, void __user *uptr) | |
694 | { | |
695 | void __user *p; | |
696 | struct shmid64_ds s64; | |
697 | struct shminfo64 smi; | |
698 | int err, err2; | |
699 | int version = compat_ipc_parse_version(&second); | |
700 | ||
03145beb DR |
701 | memset(&s64, 0, sizeof(s64)); |
702 | ||
1da177e4 LT |
703 | switch (second & (~IPC_64)) { |
704 | case IPC_RMID: | |
705 | case SHM_LOCK: | |
706 | case SHM_UNLOCK: | |
707 | err = sys_shmctl(first, second, uptr); | |
708 | break; | |
709 | ||
710 | case IPC_INFO: | |
711 | p = compat_alloc_user_space(sizeof(smi)); | |
712 | err = sys_shmctl(first, second, p); | |
713 | if (err < 0) | |
714 | break; | |
715 | if (copy_from_user(&smi, p, sizeof(smi))) | |
716 | err2 = -EFAULT; | |
717 | else if (version == IPC_64) | |
718 | err2 = put_compat_shminfo64(&smi, uptr); | |
719 | else | |
720 | err2 = put_compat_shminfo(&smi, uptr); | |
721 | if (err2) | |
722 | err = -EFAULT; | |
723 | break; | |
724 | ||
725 | ||
726 | case IPC_SET: | |
727 | if (version == IPC_64) { | |
728 | err = get_compat_shmid64_ds(&s64, uptr); | |
729 | } else { | |
730 | err = get_compat_shmid_ds(&s64, uptr); | |
731 | } | |
732 | if (err) | |
733 | break; | |
734 | p = compat_alloc_user_space(sizeof(s64)); | |
735 | if (copy_to_user(p, &s64, sizeof(s64))) | |
736 | err = -EFAULT; | |
737 | else | |
738 | err = sys_shmctl(first, second, p); | |
739 | break; | |
740 | ||
741 | case IPC_STAT: | |
742 | case SHM_STAT: | |
743 | p = compat_alloc_user_space(sizeof(s64)); | |
744 | err = sys_shmctl(first, second, p); | |
745 | if (err < 0) | |
746 | break; | |
747 | if (copy_from_user(&s64, p, sizeof(s64))) | |
748 | err2 = -EFAULT; | |
749 | else if (version == IPC_64) | |
750 | err2 = put_compat_shmid64_ds(&s64, uptr); | |
751 | else | |
752 | err2 = put_compat_shmid_ds(&s64, uptr); | |
753 | if (err2) | |
754 | err = -EFAULT; | |
755 | break; | |
756 | ||
757 | case SHM_INFO: | |
758 | p = compat_alloc_user_space(sizeof(struct shm_info)); | |
759 | err = sys_shmctl(first, second, p); | |
760 | if (err < 0) | |
761 | break; | |
762 | err2 = put_compat_shm_info(p, uptr); | |
763 | if (err2) | |
764 | err = -EFAULT; | |
765 | break; | |
766 | ||
767 | default: | |
768 | err = -EINVAL; | |
769 | break; | |
770 | } | |
771 | return err; | |
772 | } | |
773 | ||
774 | long compat_sys_semtimedop(int semid, struct sembuf __user *tsems, | |
775 | unsigned nsops, const struct compat_timespec __user *timeout) | |
776 | { | |
777 | struct timespec __user *ts64 = NULL; | |
778 | if (timeout) { | |
779 | struct timespec ts; | |
780 | ts64 = compat_alloc_user_space(sizeof(*ts64)); | |
781 | if (get_compat_timespec(&ts, timeout)) | |
782 | return -EFAULT; | |
783 | if (copy_to_user(ts64, &ts, sizeof(ts))) | |
784 | return -EFAULT; | |
785 | } | |
786 | return sys_semtimedop(semid, tsems, nsops, ts64); | |
787 | } |