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])
118 #define MAXBUF (64*1024)
120 static inline int compat_ipc_parse_version(int *cmd)
122 int version = *cmd & IPC_64;
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
135 static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64,
136 struct compat_ipc64_perm __user *up64)
140 err = __get_user(p64->uid, &up64->uid);
141 err |= __get_user(p64->gid, &up64->gid);
142 err |= __get_user(p64->mode, &up64->mode);
146 static inline int __get_compat_ipc_perm(struct ipc64_perm *p,
147 struct compat_ipc_perm __user *up)
151 err = __get_user(p->uid, &up->uid);
152 err |= __get_user(p->gid, &up->gid);
153 err |= __get_user(p->mode, &up->mode);
157 static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64,
158 struct compat_ipc64_perm __user *up64)
162 err = __put_user(p64->key, &up64->key);
163 err |= __put_user(p64->uid, &up64->uid);
164 err |= __put_user(p64->gid, &up64->gid);
165 err |= __put_user(p64->cuid, &up64->cuid);
166 err |= __put_user(p64->cgid, &up64->cgid);
167 err |= __put_user(p64->mode, &up64->mode);
168 err |= __put_user(p64->seq, &up64->seq);
172 static inline int __put_compat_ipc_perm(struct ipc64_perm *p,
173 struct compat_ipc_perm __user *up)
179 err = __put_user(p->key, &up->key);
181 err |= __put_user(u, &up->uid);
183 err |= __put_user(g, &up->gid);
185 err |= __put_user(u, &up->cuid);
187 err |= __put_user(g, &up->cgid);
188 err |= __put_user(p->mode, &up->mode);
189 err |= __put_user(p->seq, &up->seq);
193 static inline int get_compat_semid64_ds(struct semid64_ds *s64,
194 struct compat_semid64_ds __user *up64)
196 if (!access_ok (VERIFY_READ, up64, sizeof(*up64)))
198 return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
201 static inline int get_compat_semid_ds(struct semid64_ds *s,
202 struct compat_semid_ds __user *up)
204 if (!access_ok (VERIFY_READ, up, sizeof(*up)))
206 return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
209 static inline int put_compat_semid64_ds(struct semid64_ds *s64,
210 struct compat_semid64_ds __user *up64)
214 if (!access_ok (VERIFY_WRITE, up64, sizeof(*up64)))
216 err = __put_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
217 err |= __put_user(s64->sem_otime, &up64->sem_otime);
218 err |= __put_user(s64->sem_ctime, &up64->sem_ctime);
219 err |= __put_user(s64->sem_nsems, &up64->sem_nsems);
223 static inline int put_compat_semid_ds(struct semid64_ds *s,
224 struct compat_semid_ds __user *up)
228 if (!access_ok (VERIFY_WRITE, up, sizeof(*up)))
230 err = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
231 err |= __put_user(s->sem_otime, &up->sem_otime);
232 err |= __put_user(s->sem_ctime, &up->sem_ctime);
233 err |= __put_user(s->sem_nsems, &up->sem_nsems);
237 long compat_sys_semctl(int first, int second, int third, void __user *uptr)
242 struct semid64_ds s64;
243 struct semid64_ds __user *up64;
244 int version = compat_ipc_parse_version(&third);
248 if (get_user(pad, (u32 __user *) uptr))
250 if ((third & (~IPC_64)) == SETVAL)
251 fourth.val = (int) pad;
253 fourth.__pad = compat_ptr(pad);
254 switch (third & (~IPC_64)) {
265 err = sys_semctl(first, second, third, fourth);
270 up64 = compat_alloc_user_space(sizeof(s64));
272 err = sys_semctl(first, second, third, fourth);
275 if (copy_from_user(&s64, up64, sizeof(s64)))
277 else if (version == IPC_64)
278 err2 = put_compat_semid64_ds(&s64, compat_ptr(pad));
280 err2 = put_compat_semid_ds(&s64, compat_ptr(pad));
286 if (version == IPC_64) {
287 err = get_compat_semid64_ds(&s64, compat_ptr(pad));
289 err = get_compat_semid_ds(&s64, compat_ptr(pad));
291 up64 = compat_alloc_user_space(sizeof(s64));
292 if (copy_to_user(up64, &s64, sizeof(s64)))
298 err = sys_semctl(first, second, third, fourth);
308 long compat_sys_msgsnd(int first, int second, int third, void __user *uptr)
310 struct msgbuf __user *p;
311 struct compat_msgbuf __user *up = uptr;
316 if (second < 0 || (second >= MAXBUF - sizeof(struct msgbuf)))
319 p = compat_alloc_user_space(second + sizeof(struct msgbuf));
320 if (get_user(type, &up->mtype) ||
321 put_user(type, &p->mtype) ||
322 copy_in_user(p->mtext, up->mtext, second))
325 return sys_msgsnd(first, p, second, third);
328 long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
329 int version, void __user *uptr)
331 struct msgbuf __user *p;
332 struct compat_msgbuf __user *up;
338 if (second < 0 || (second >= MAXBUF - sizeof(struct msgbuf)))
342 struct compat_ipc_kludge ipck;
347 if (copy_from_user (&ipck, uptr, sizeof(ipck)))
349 uptr = compat_ptr(ipck.msgp);
350 msgtyp = ipck.msgtyp;
352 p = compat_alloc_user_space(second + sizeof(struct msgbuf));
353 err = sys_msgrcv(first, p, second, msgtyp, third);
357 if (get_user(type, &p->mtype) ||
358 put_user(type, &up->mtype) ||
359 copy_in_user(up->mtext, p->mtext, err))
365 static inline int get_compat_msqid64(struct msqid64_ds *m64,
366 struct compat_msqid64_ds __user *up64)
370 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
372 err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
373 err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
377 static inline int get_compat_msqid(struct msqid64_ds *m,
378 struct compat_msqid_ds __user *up)
382 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
384 err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
385 err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
389 static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
390 struct compat_msqid64_ds __user *up64)
394 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
396 err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
397 err |= __put_user(m64->msg_stime, &up64->msg_stime);
398 err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
399 err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
400 err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
401 err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
402 err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
403 err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
404 err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
408 static inline int put_compat_msqid_ds(struct msqid64_ds *m,
409 struct compat_msqid_ds __user *up)
413 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
415 err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
416 err |= __put_user(m->msg_stime, &up->msg_stime);
417 err |= __put_user(m->msg_rtime, &up->msg_rtime);
418 err |= __put_user(m->msg_ctime, &up->msg_ctime);
419 err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
420 err |= __put_user(m->msg_qnum, &up->msg_qnum);
421 err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
422 err |= __put_user(m->msg_lspid, &up->msg_lspid);
423 err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
427 long compat_sys_msgctl(int first, int second, void __user *uptr)
430 struct msqid64_ds m64;
431 int version = compat_ipc_parse_version(&second);
434 switch (second & (~IPC_64)) {
438 err = sys_msgctl(first, second, uptr);
442 if (version == IPC_64) {
443 err = get_compat_msqid64(&m64, uptr);
445 err = get_compat_msqid(&m64, uptr);
449 p = compat_alloc_user_space(sizeof(m64));
450 if (copy_to_user(p, &m64, sizeof(m64)))
453 err = sys_msgctl(first, second, p);
458 p = compat_alloc_user_space(sizeof(m64));
459 err = sys_msgctl(first, second, p);
462 if (copy_from_user(&m64, p, sizeof(m64)))
464 else if (version == IPC_64)
465 err2 = put_compat_msqid64_ds(&m64, uptr);
467 err2 = put_compat_msqid_ds(&m64, uptr);
479 long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
484 compat_ulong_t __user *uaddr;
488 err = do_shmat(first, uptr, second, &raddr);
491 uaddr = compat_ptr(third);
492 return put_user(raddr, uaddr);
495 static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
496 struct compat_shmid64_ds __user *up64)
498 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
500 return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
503 static inline int get_compat_shmid_ds(struct shmid64_ds *s,
504 struct compat_shmid_ds __user *up)
506 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
508 return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
511 static inline int put_compat_shmid64_ds(struct shmid64_ds *s64,
512 struct compat_shmid64_ds __user *up64)
516 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
518 err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
519 err |= __put_user(s64->shm_atime, &up64->shm_atime);
520 err |= __put_user(s64->shm_dtime, &up64->shm_dtime);
521 err |= __put_user(s64->shm_ctime, &up64->shm_ctime);
522 err |= __put_user(s64->shm_segsz, &up64->shm_segsz);
523 err |= __put_user(s64->shm_nattch, &up64->shm_nattch);
524 err |= __put_user(s64->shm_cpid, &up64->shm_cpid);
525 err |= __put_user(s64->shm_lpid, &up64->shm_lpid);
529 static inline int put_compat_shmid_ds(struct shmid64_ds *s,
530 struct compat_shmid_ds __user *up)
534 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
536 err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
537 err |= __put_user(s->shm_atime, &up->shm_atime);
538 err |= __put_user(s->shm_dtime, &up->shm_dtime);
539 err |= __put_user(s->shm_ctime, &up->shm_ctime);
540 err |= __put_user(s->shm_segsz, &up->shm_segsz);
541 err |= __put_user(s->shm_nattch, &up->shm_nattch);
542 err |= __put_user(s->shm_cpid, &up->shm_cpid);
543 err |= __put_user(s->shm_lpid, &up->shm_lpid);
547 static inline int put_compat_shminfo64(struct shminfo64 *smi,
548 struct compat_shminfo64 __user *up64)
552 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
554 err = __put_user(smi->shmmax, &up64->shmmax);
555 err |= __put_user(smi->shmmin, &up64->shmmin);
556 err |= __put_user(smi->shmmni, &up64->shmmni);
557 err |= __put_user(smi->shmseg, &up64->shmseg);
558 err |= __put_user(smi->shmall, &up64->shmall);
562 static inline int put_compat_shminfo(struct shminfo64 *smi,
563 struct shminfo __user *up)
567 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
569 err = __put_user(smi->shmmax, &up->shmmax);
570 err |= __put_user(smi->shmmin, &up->shmmin);
571 err |= __put_user(smi->shmmni, &up->shmmni);
572 err |= __put_user(smi->shmseg, &up->shmseg);
573 err |= __put_user(smi->shmall, &up->shmall);
577 static inline int put_compat_shm_info(struct shm_info __user *ip,
578 struct compat_shm_info __user *uip)
583 if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
584 copy_from_user(&si, ip, sizeof(si)))
586 err = __put_user(si.used_ids, &uip->used_ids);
587 err |= __put_user(si.shm_tot, &uip->shm_tot);
588 err |= __put_user(si.shm_rss, &uip->shm_rss);
589 err |= __put_user(si.shm_swp, &uip->shm_swp);
590 err |= __put_user(si.swap_attempts, &uip->swap_attempts);
591 err |= __put_user(si.swap_successes, &uip->swap_successes);
595 long compat_sys_shmctl(int first, int second, void __user *uptr)
598 struct shmid64_ds s64;
599 struct shminfo64 smi;
601 int version = compat_ipc_parse_version(&second);
603 switch (second & (~IPC_64)) {
607 err = sys_shmctl(first, second, uptr);
611 p = compat_alloc_user_space(sizeof(smi));
612 err = sys_shmctl(first, second, p);
615 if (copy_from_user(&smi, p, sizeof(smi)))
617 else if (version == IPC_64)
618 err2 = put_compat_shminfo64(&smi, uptr);
620 err2 = put_compat_shminfo(&smi, uptr);
627 if (version == IPC_64) {
628 err = get_compat_shmid64_ds(&s64, uptr);
630 err = get_compat_shmid_ds(&s64, uptr);
634 p = compat_alloc_user_space(sizeof(s64));
635 if (copy_to_user(p, &s64, sizeof(s64)))
638 err = sys_shmctl(first, second, p);
643 p = compat_alloc_user_space(sizeof(s64));
644 err = sys_shmctl(first, second, p);
647 if (copy_from_user(&s64, p, sizeof(s64)))
649 else if (version == IPC_64)
650 err2 = put_compat_shmid64_ds(&s64, uptr);
652 err2 = put_compat_shmid_ds(&s64, uptr);
658 p = compat_alloc_user_space(sizeof(struct shm_info));
659 err = sys_shmctl(first, second, p);
662 err2 = put_compat_shm_info(p, uptr);
674 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
675 unsigned nsops, const struct compat_timespec __user *timeout)
677 struct timespec __user *ts64 = NULL;
680 ts64 = compat_alloc_user_space(sizeof(*ts64));
681 if (get_compat_timespec(&ts, timeout))
683 if (copy_to_user(ts64, &ts, sizeof(ts)))
686 return sys_semtimedop(semid, tsems, nsops, ts64);