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);
247 if (get_user(pad, (u32 __user *) uptr))
249 if ((third & (~IPC_64)) == SETVAL)
250 fourth.val = (int) pad;
252 fourth.__pad = compat_ptr(pad);
253 switch (third & (~IPC_64)) {
264 err = sys_semctl(first, second, third, fourth);
269 up64 = compat_alloc_user_space(sizeof(s64));
271 err = sys_semctl(first, second, third, fourth);
274 if (copy_from_user(&s64, up64, sizeof(s64)))
276 else if (version == IPC_64)
277 err2 = put_compat_semid64_ds(&s64, compat_ptr(pad));
279 err2 = put_compat_semid_ds(&s64, compat_ptr(pad));
285 if (version == IPC_64) {
286 err = get_compat_semid64_ds(&s64, compat_ptr(pad));
288 err = get_compat_semid_ds(&s64, compat_ptr(pad));
290 up64 = compat_alloc_user_space(sizeof(s64));
291 if (copy_to_user(up64, &s64, sizeof(s64)))
297 err = sys_semctl(first, second, third, fourth);
307 long compat_sys_msgsnd(int first, int second, int third, void __user *uptr)
309 struct compat_msgbuf __user *up = uptr;
317 if (get_user(type, &up->mtype))
320 return do_msgsnd(first, type, up->mtext, second, third);
323 long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
324 int version, void __user *uptr)
326 struct compat_msgbuf __user *up;
336 struct compat_ipc_kludge ipck;
341 if (copy_from_user (&ipck, uptr, sizeof(ipck)))
343 uptr = compat_ptr(ipck.msgp);
344 msgtyp = ipck.msgtyp;
347 err = do_msgrcv(first, &type, up->mtext, second, msgtyp, third);
350 if (put_user(type, &up->mtype))
356 static inline int get_compat_msqid64(struct msqid64_ds *m64,
357 struct compat_msqid64_ds __user *up64)
361 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
363 err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
364 err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
368 static inline int get_compat_msqid(struct msqid64_ds *m,
369 struct compat_msqid_ds __user *up)
373 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
375 err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
376 err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
380 static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
381 struct compat_msqid64_ds __user *up64)
385 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
387 err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
388 err |= __put_user(m64->msg_stime, &up64->msg_stime);
389 err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
390 err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
391 err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
392 err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
393 err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
394 err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
395 err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
399 static inline int put_compat_msqid_ds(struct msqid64_ds *m,
400 struct compat_msqid_ds __user *up)
404 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
406 err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
407 err |= __put_user(m->msg_stime, &up->msg_stime);
408 err |= __put_user(m->msg_rtime, &up->msg_rtime);
409 err |= __put_user(m->msg_ctime, &up->msg_ctime);
410 err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
411 err |= __put_user(m->msg_qnum, &up->msg_qnum);
412 err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
413 err |= __put_user(m->msg_lspid, &up->msg_lspid);
414 err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
418 long compat_sys_msgctl(int first, int second, void __user *uptr)
421 struct msqid64_ds m64;
422 int version = compat_ipc_parse_version(&second);
425 switch (second & (~IPC_64)) {
429 err = sys_msgctl(first, second, uptr);
433 if (version == IPC_64) {
434 err = get_compat_msqid64(&m64, uptr);
436 err = get_compat_msqid(&m64, uptr);
440 p = compat_alloc_user_space(sizeof(m64));
441 if (copy_to_user(p, &m64, sizeof(m64)))
444 err = sys_msgctl(first, second, p);
449 p = compat_alloc_user_space(sizeof(m64));
450 err = sys_msgctl(first, second, p);
453 if (copy_from_user(&m64, p, sizeof(m64)))
455 else if (version == IPC_64)
456 err2 = put_compat_msqid64_ds(&m64, uptr);
458 err2 = put_compat_msqid_ds(&m64, uptr);
470 long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
475 compat_ulong_t __user *uaddr;
479 err = do_shmat(first, uptr, second, &raddr);
482 uaddr = compat_ptr(third);
483 return put_user(raddr, uaddr);
486 static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
487 struct compat_shmid64_ds __user *up64)
489 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
491 return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
494 static inline int get_compat_shmid_ds(struct shmid64_ds *s,
495 struct compat_shmid_ds __user *up)
497 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
499 return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
502 static inline int put_compat_shmid64_ds(struct shmid64_ds *s64,
503 struct compat_shmid64_ds __user *up64)
507 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
509 err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
510 err |= __put_user(s64->shm_atime, &up64->shm_atime);
511 err |= __put_user(s64->shm_dtime, &up64->shm_dtime);
512 err |= __put_user(s64->shm_ctime, &up64->shm_ctime);
513 err |= __put_user(s64->shm_segsz, &up64->shm_segsz);
514 err |= __put_user(s64->shm_nattch, &up64->shm_nattch);
515 err |= __put_user(s64->shm_cpid, &up64->shm_cpid);
516 err |= __put_user(s64->shm_lpid, &up64->shm_lpid);
520 static inline int put_compat_shmid_ds(struct shmid64_ds *s,
521 struct compat_shmid_ds __user *up)
525 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
527 err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
528 err |= __put_user(s->shm_atime, &up->shm_atime);
529 err |= __put_user(s->shm_dtime, &up->shm_dtime);
530 err |= __put_user(s->shm_ctime, &up->shm_ctime);
531 err |= __put_user(s->shm_segsz, &up->shm_segsz);
532 err |= __put_user(s->shm_nattch, &up->shm_nattch);
533 err |= __put_user(s->shm_cpid, &up->shm_cpid);
534 err |= __put_user(s->shm_lpid, &up->shm_lpid);
538 static inline int put_compat_shminfo64(struct shminfo64 *smi,
539 struct compat_shminfo64 __user *up64)
543 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
545 if (smi->shmmax > INT_MAX)
546 smi->shmmax = INT_MAX;
547 err = __put_user(smi->shmmax, &up64->shmmax);
548 err |= __put_user(smi->shmmin, &up64->shmmin);
549 err |= __put_user(smi->shmmni, &up64->shmmni);
550 err |= __put_user(smi->shmseg, &up64->shmseg);
551 err |= __put_user(smi->shmall, &up64->shmall);
555 static inline int put_compat_shminfo(struct shminfo64 *smi,
556 struct shminfo __user *up)
560 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
562 if (smi->shmmax > INT_MAX)
563 smi->shmmax = INT_MAX;
564 err = __put_user(smi->shmmax, &up->shmmax);
565 err |= __put_user(smi->shmmin, &up->shmmin);
566 err |= __put_user(smi->shmmni, &up->shmmni);
567 err |= __put_user(smi->shmseg, &up->shmseg);
568 err |= __put_user(smi->shmall, &up->shmall);
572 static inline int put_compat_shm_info(struct shm_info __user *ip,
573 struct compat_shm_info __user *uip)
578 if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
579 copy_from_user(&si, ip, sizeof(si)))
581 err = __put_user(si.used_ids, &uip->used_ids);
582 err |= __put_user(si.shm_tot, &uip->shm_tot);
583 err |= __put_user(si.shm_rss, &uip->shm_rss);
584 err |= __put_user(si.shm_swp, &uip->shm_swp);
585 err |= __put_user(si.swap_attempts, &uip->swap_attempts);
586 err |= __put_user(si.swap_successes, &uip->swap_successes);
590 long compat_sys_shmctl(int first, int second, void __user *uptr)
593 struct shmid64_ds s64;
594 struct shminfo64 smi;
596 int version = compat_ipc_parse_version(&second);
598 switch (second & (~IPC_64)) {
602 err = sys_shmctl(first, second, uptr);
606 p = compat_alloc_user_space(sizeof(smi));
607 err = sys_shmctl(first, second, p);
610 if (copy_from_user(&smi, p, sizeof(smi)))
612 else if (version == IPC_64)
613 err2 = put_compat_shminfo64(&smi, uptr);
615 err2 = put_compat_shminfo(&smi, uptr);
622 if (version == IPC_64) {
623 err = get_compat_shmid64_ds(&s64, uptr);
625 err = get_compat_shmid_ds(&s64, uptr);
629 p = compat_alloc_user_space(sizeof(s64));
630 if (copy_to_user(p, &s64, sizeof(s64)))
633 err = sys_shmctl(first, second, p);
638 p = compat_alloc_user_space(sizeof(s64));
639 err = sys_shmctl(first, second, p);
642 if (copy_from_user(&s64, p, sizeof(s64)))
644 else if (version == IPC_64)
645 err2 = put_compat_shmid64_ds(&s64, uptr);
647 err2 = put_compat_shmid_ds(&s64, uptr);
653 p = compat_alloc_user_space(sizeof(struct shm_info));
654 err = sys_shmctl(first, second, p);
657 err2 = put_compat_shm_info(p, uptr);
669 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
670 unsigned nsops, const struct compat_timespec __user *timeout)
672 struct timespec __user *ts64 = NULL;
675 ts64 = compat_alloc_user_space(sizeof(*ts64));
676 if (get_compat_timespec(&ts, timeout))
678 if (copy_to_user(ts64, &ts, sizeof(ts)))
681 return sys_semtimedop(semid, tsems, nsops, ts64);