2 * 32 bit compatibility code for System V IPC
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)
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
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/slab.h>
30 #include <linux/syscalls.h>
32 #include <linux/mutex.h>
33 #include <asm/uaccess.h>
37 struct compat_msgbuf {
42 struct compat_ipc_perm {
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;
60 unsigned short sem_nsems;
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;
79 struct compat_shmid_ds {
80 struct compat_ipc_perm shm_perm;
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;
93 struct compat_ipc_kludge {
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;
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;
116 extern int sem_ctls[];
117 #define sc_semopm (sem_ctls[2])
119 static inline int compat_ipc_parse_version(int *cmd)
121 int version = *cmd & IPC_64;
123 /* this is tricky: architectures that have support for the old
124 * ipc structures in 64 bit binaries need to have IPC_64 set
125 * in cmd, the others need to have it cleared */
126 #ifndef ipc_parse_version
134 static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64,
135 struct compat_ipc64_perm __user *up64)
139 err = __get_user(p64->uid, &up64->uid);
140 err |= __get_user(p64->gid, &up64->gid);
141 err |= __get_user(p64->mode, &up64->mode);
145 static inline int __get_compat_ipc_perm(struct ipc64_perm *p,
146 struct compat_ipc_perm __user *up)
150 err = __get_user(p->uid, &up->uid);
151 err |= __get_user(p->gid, &up->gid);
152 err |= __get_user(p->mode, &up->mode);
156 static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64,
157 struct compat_ipc64_perm __user *up64)
161 err = __put_user(p64->key, &up64->key);
162 err |= __put_user(p64->uid, &up64->uid);
163 err |= __put_user(p64->gid, &up64->gid);
164 err |= __put_user(p64->cuid, &up64->cuid);
165 err |= __put_user(p64->cgid, &up64->cgid);
166 err |= __put_user(p64->mode, &up64->mode);
167 err |= __put_user(p64->seq, &up64->seq);
171 static inline int __put_compat_ipc_perm(struct ipc64_perm *p,
172 struct compat_ipc_perm __user *up)
178 err = __put_user(p->key, &up->key);
180 err |= __put_user(u, &up->uid);
182 err |= __put_user(g, &up->gid);
184 err |= __put_user(u, &up->cuid);
186 err |= __put_user(g, &up->cgid);
187 err |= __put_user(p->mode, &up->mode);
188 err |= __put_user(p->seq, &up->seq);
192 static inline int get_compat_semid64_ds(struct semid64_ds *s64,
193 struct compat_semid64_ds __user *up64)
195 if (!access_ok (VERIFY_READ, up64, sizeof(*up64)))
197 return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
200 static inline int get_compat_semid_ds(struct semid64_ds *s,
201 struct compat_semid_ds __user *up)
203 if (!access_ok (VERIFY_READ, up, sizeof(*up)))
205 return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
208 static inline int put_compat_semid64_ds(struct semid64_ds *s64,
209 struct compat_semid64_ds __user *up64)
213 if (!access_ok (VERIFY_WRITE, up64, sizeof(*up64)))
215 err = __put_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
216 err |= __put_user(s64->sem_otime, &up64->sem_otime);
217 err |= __put_user(s64->sem_ctime, &up64->sem_ctime);
218 err |= __put_user(s64->sem_nsems, &up64->sem_nsems);
222 static inline int put_compat_semid_ds(struct semid64_ds *s,
223 struct compat_semid_ds __user *up)
227 if (!access_ok (VERIFY_WRITE, up, sizeof(*up)))
229 err = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
230 err |= __put_user(s->sem_otime, &up->sem_otime);
231 err |= __put_user(s->sem_ctime, &up->sem_ctime);
232 err |= __put_user(s->sem_nsems, &up->sem_nsems);
236 long compat_sys_semctl(int first, int second, int third, void __user *uptr)
241 struct semid64_ds s64;
242 struct semid64_ds __user *up64;
243 int version = compat_ipc_parse_version(&third);
245 memset(&s64, 0, sizeof(s64));
249 if (get_user(pad, (u32 __user *) uptr))
251 if ((third & (~IPC_64)) == SETVAL)
252 fourth.val = (int) pad;
254 fourth.__pad = compat_ptr(pad);
255 switch (third & (~IPC_64)) {
266 err = sys_semctl(first, second, third, fourth);
271 up64 = compat_alloc_user_space(sizeof(s64));
273 err = sys_semctl(first, second, third, fourth);
276 if (copy_from_user(&s64, up64, sizeof(s64)))
278 else if (version == IPC_64)
279 err2 = put_compat_semid64_ds(&s64, compat_ptr(pad));
281 err2 = put_compat_semid_ds(&s64, compat_ptr(pad));
287 if (version == IPC_64) {
288 err = get_compat_semid64_ds(&s64, compat_ptr(pad));
290 err = get_compat_semid_ds(&s64, compat_ptr(pad));
292 up64 = compat_alloc_user_space(sizeof(s64));
293 if (copy_to_user(up64, &s64, sizeof(s64)))
299 err = sys_semctl(first, second, third, fourth);
309 long compat_sys_msgsnd(int first, int second, int third, void __user *uptr)
311 struct compat_msgbuf __user *up = uptr;
319 if (get_user(type, &up->mtype))
322 return do_msgsnd(first, type, up->mtext, second, third);
325 long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
326 int version, void __user *uptr)
328 struct compat_msgbuf __user *up;
338 struct compat_ipc_kludge ipck;
343 if (copy_from_user (&ipck, uptr, sizeof(ipck)))
345 uptr = compat_ptr(ipck.msgp);
346 msgtyp = ipck.msgtyp;
349 err = do_msgrcv(first, &type, up->mtext, second, msgtyp, third);
352 if (put_user(type, &up->mtype))
358 static inline int get_compat_msqid64(struct msqid64_ds *m64,
359 struct compat_msqid64_ds __user *up64)
363 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
365 err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
366 err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
370 static inline int get_compat_msqid(struct msqid64_ds *m,
371 struct compat_msqid_ds __user *up)
375 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
377 err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
378 err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
382 static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
383 struct compat_msqid64_ds __user *up64)
387 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
389 err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
390 err |= __put_user(m64->msg_stime, &up64->msg_stime);
391 err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
392 err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
393 err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
394 err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
395 err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
396 err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
397 err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
401 static inline int put_compat_msqid_ds(struct msqid64_ds *m,
402 struct compat_msqid_ds __user *up)
406 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
408 err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
409 err |= __put_user(m->msg_stime, &up->msg_stime);
410 err |= __put_user(m->msg_rtime, &up->msg_rtime);
411 err |= __put_user(m->msg_ctime, &up->msg_ctime);
412 err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
413 err |= __put_user(m->msg_qnum, &up->msg_qnum);
414 err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
415 err |= __put_user(m->msg_lspid, &up->msg_lspid);
416 err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
420 long compat_sys_msgctl(int first, int second, void __user *uptr)
423 struct msqid64_ds m64;
424 int version = compat_ipc_parse_version(&second);
427 memset(&m64, 0, sizeof(m64));
429 switch (second & (~IPC_64)) {
433 err = sys_msgctl(first, second, uptr);
437 if (version == IPC_64) {
438 err = get_compat_msqid64(&m64, uptr);
440 err = get_compat_msqid(&m64, uptr);
444 p = compat_alloc_user_space(sizeof(m64));
445 if (copy_to_user(p, &m64, sizeof(m64)))
448 err = sys_msgctl(first, second, p);
453 p = compat_alloc_user_space(sizeof(m64));
454 err = sys_msgctl(first, second, p);
457 if (copy_from_user(&m64, p, sizeof(m64)))
459 else if (version == IPC_64)
460 err2 = put_compat_msqid64_ds(&m64, uptr);
462 err2 = put_compat_msqid_ds(&m64, uptr);
474 long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
479 compat_ulong_t __user *uaddr;
483 err = do_shmat(first, uptr, second, &raddr);
486 uaddr = compat_ptr(third);
487 return put_user(raddr, uaddr);
490 static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
491 struct compat_shmid64_ds __user *up64)
493 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
495 return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
498 static inline int get_compat_shmid_ds(struct shmid64_ds *s,
499 struct compat_shmid_ds __user *up)
501 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
503 return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
506 static inline int put_compat_shmid64_ds(struct shmid64_ds *s64,
507 struct compat_shmid64_ds __user *up64)
511 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
513 err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
514 err |= __put_user(s64->shm_atime, &up64->shm_atime);
515 err |= __put_user(s64->shm_dtime, &up64->shm_dtime);
516 err |= __put_user(s64->shm_ctime, &up64->shm_ctime);
517 err |= __put_user(s64->shm_segsz, &up64->shm_segsz);
518 err |= __put_user(s64->shm_nattch, &up64->shm_nattch);
519 err |= __put_user(s64->shm_cpid, &up64->shm_cpid);
520 err |= __put_user(s64->shm_lpid, &up64->shm_lpid);
524 static inline int put_compat_shmid_ds(struct shmid64_ds *s,
525 struct compat_shmid_ds __user *up)
529 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
531 err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
532 err |= __put_user(s->shm_atime, &up->shm_atime);
533 err |= __put_user(s->shm_dtime, &up->shm_dtime);
534 err |= __put_user(s->shm_ctime, &up->shm_ctime);
535 err |= __put_user(s->shm_segsz, &up->shm_segsz);
536 err |= __put_user(s->shm_nattch, &up->shm_nattch);
537 err |= __put_user(s->shm_cpid, &up->shm_cpid);
538 err |= __put_user(s->shm_lpid, &up->shm_lpid);
542 static inline int put_compat_shminfo64(struct shminfo64 *smi,
543 struct compat_shminfo64 __user *up64)
547 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
549 if (smi->shmmax > INT_MAX)
550 smi->shmmax = INT_MAX;
551 err = __put_user(smi->shmmax, &up64->shmmax);
552 err |= __put_user(smi->shmmin, &up64->shmmin);
553 err |= __put_user(smi->shmmni, &up64->shmmni);
554 err |= __put_user(smi->shmseg, &up64->shmseg);
555 err |= __put_user(smi->shmall, &up64->shmall);
559 static inline int put_compat_shminfo(struct shminfo64 *smi,
560 struct shminfo __user *up)
564 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
566 if (smi->shmmax > INT_MAX)
567 smi->shmmax = INT_MAX;
568 err = __put_user(smi->shmmax, &up->shmmax);
569 err |= __put_user(smi->shmmin, &up->shmmin);
570 err |= __put_user(smi->shmmni, &up->shmmni);
571 err |= __put_user(smi->shmseg, &up->shmseg);
572 err |= __put_user(smi->shmall, &up->shmall);
576 static inline int put_compat_shm_info(struct shm_info __user *ip,
577 struct compat_shm_info __user *uip)
582 if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
583 copy_from_user(&si, ip, sizeof(si)))
585 err = __put_user(si.used_ids, &uip->used_ids);
586 err |= __put_user(si.shm_tot, &uip->shm_tot);
587 err |= __put_user(si.shm_rss, &uip->shm_rss);
588 err |= __put_user(si.shm_swp, &uip->shm_swp);
589 err |= __put_user(si.swap_attempts, &uip->swap_attempts);
590 err |= __put_user(si.swap_successes, &uip->swap_successes);
594 long compat_sys_shmctl(int first, int second, void __user *uptr)
597 struct shmid64_ds s64;
598 struct shminfo64 smi;
600 int version = compat_ipc_parse_version(&second);
602 memset(&s64, 0, sizeof(s64));
604 switch (second & (~IPC_64)) {
608 err = sys_shmctl(first, second, uptr);
612 p = compat_alloc_user_space(sizeof(smi));
613 err = sys_shmctl(first, second, p);
616 if (copy_from_user(&smi, p, sizeof(smi)))
618 else if (version == IPC_64)
619 err2 = put_compat_shminfo64(&smi, uptr);
621 err2 = put_compat_shminfo(&smi, uptr);
628 if (version == IPC_64) {
629 err = get_compat_shmid64_ds(&s64, uptr);
631 err = get_compat_shmid_ds(&s64, uptr);
635 p = compat_alloc_user_space(sizeof(s64));
636 if (copy_to_user(p, &s64, sizeof(s64)))
639 err = sys_shmctl(first, second, p);
644 p = compat_alloc_user_space(sizeof(s64));
645 err = sys_shmctl(first, second, p);
648 if (copy_from_user(&s64, p, sizeof(s64)))
650 else if (version == IPC_64)
651 err2 = put_compat_shmid64_ds(&s64, uptr);
653 err2 = put_compat_shmid_ds(&s64, uptr);
659 p = compat_alloc_user_space(sizeof(struct shm_info));
660 err = sys_shmctl(first, second, p);
663 err2 = put_compat_shm_info(p, uptr);
675 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
676 unsigned nsops, const struct compat_timespec __user *timeout)
678 struct timespec __user *ts64 = NULL;
681 ts64 = compat_alloc_user_space(sizeof(*ts64));
682 if (get_compat_timespec(&ts, timeout))
684 if (copy_to_user(ts64, &ts, sizeof(ts)))
687 return sys_semtimedop(semid, tsems, nsops, ts64);