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/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>
33 #include <asm/semaphore.h>
34 #include <asm/uaccess.h>
38 struct compat_msgbuf {
43 struct compat_ipc_perm {
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;
61 unsigned short sem_nsems;
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;
80 struct compat_shmid_ds {
81 struct compat_ipc_perm shm_perm;
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;
94 struct compat_ipc_kludge {
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;
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;
117 extern int sem_ctls[];
118 #define sc_semopm (sem_ctls[2])
119 #define MAXBUF (64*1024)
121 static inline int compat_ipc_parse_version(int *cmd)
123 int version = *cmd & IPC_64;
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
136 static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64,
137 struct compat_ipc64_perm *up64)
141 err = __get_user(p64->uid, &up64->uid);
142 err |= __get_user(p64->gid, &up64->gid);
143 err |= __get_user(p64->mode, &up64->mode);
147 static inline int __get_compat_ipc_perm(struct ipc64_perm *p,
148 struct compat_ipc_perm *up)
152 err = __get_user(p->uid, &up->uid);
153 err |= __get_user(p->gid, &up->gid);
154 err |= __get_user(p->mode, &up->mode);
158 static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64,
159 struct compat_ipc64_perm *up64)
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);
173 static inline int __put_compat_ipc_perm(struct ipc64_perm *p,
174 struct compat_ipc_perm *up)
180 err = __put_user(p->key, &up->key);
182 err |= __put_user(u, &up->uid);
184 err |= __put_user(g, &up->gid);
186 err |= __put_user(u, &up->cuid);
188 err |= __put_user(g, &up->cgid);
189 err |= __put_user(p->mode, &up->mode);
190 err |= __put_user(p->seq, &up->seq);
194 static inline int get_compat_semid64_ds(struct semid64_ds *s64,
195 struct compat_semid64_ds *up64)
197 if (!access_ok (VERIFY_READ, up64, sizeof(*up64)))
199 return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
202 static inline int get_compat_semid_ds(struct semid64_ds *s,
203 struct compat_semid_ds *up)
205 if (!access_ok (VERIFY_READ, up, sizeof(*up)))
207 return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
210 static inline int put_compat_semid64_ds(struct semid64_ds *s64,
211 struct compat_semid64_ds *up64)
215 if (!access_ok (VERIFY_WRITE, up64, sizeof(*up64)))
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);
224 static inline int put_compat_semid_ds(struct semid64_ds *s,
225 struct compat_semid_ds *up)
229 if (!access_ok (VERIFY_WRITE, up, sizeof(*up)))
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);
238 static inline int do_semctl(int semid, int semnum, int cmd, union semun arg)
245 err = sys_semctl(semid, semnum, cmd, arg);
250 long compat_sys_semctl(int first, int second, int third, void __user *uptr)
255 struct semid64_ds s64;
256 int version = compat_ipc_parse_version(&third);
260 if (get_user(pad, (u32 __user *) uptr))
262 if ((third & (~IPC_64)) == SETVAL)
263 fourth.val = (int) pad;
265 fourth.__pad = compat_ptr(pad);
266 switch (third & (~IPC_64)) {
277 err = sys_semctl(first, second, third, fourth);
283 err = do_semctl(first, second, third, fourth);
287 if (version == IPC_64) {
288 err2 = put_compat_semid64_ds(&s64, compat_ptr(pad));
290 err2 = put_compat_semid_ds(&s64, compat_ptr(pad));
297 if (version == IPC_64) {
298 err = get_compat_semid64_ds(&s64, compat_ptr(pad));
300 err = get_compat_semid_ds(&s64, compat_ptr(pad));
306 err = do_semctl(first, second, third, fourth);
316 long compat_sys_msgsnd(int first, int second, int third, void __user *uptr)
319 struct compat_msgbuf __user *up;
325 if (second < 0 || (second >= MAXBUF - sizeof(struct msgbuf)))
328 p = kmalloc(second + sizeof(struct msgbuf), GFP_USER);
333 if (get_user(p->mtype, &up->mtype) ||
334 copy_from_user(p->mtext, &up->mtext, second))
338 err = sys_msgsnd(first, p, second, third);
345 long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
346 int version, void __user *uptr)
349 struct compat_msgbuf __user *up;
355 if (second < 0 || (second >= MAXBUF - sizeof(struct msgbuf)))
359 struct compat_ipc_kludge __user *uipck = uptr;
360 struct compat_ipc_kludge ipck;
366 if (copy_from_user (&ipck, uipck, sizeof(ipck)))
368 uptr = compat_ptr(ipck.msgp);
369 msgtyp = ipck.msgtyp;
372 p = kmalloc(second + sizeof(struct msgbuf), GFP_USER);
377 err = sys_msgrcv(first, p, second, msgtyp, third);
382 if (put_user(p->mtype, &up->mtype) ||
383 __copy_to_user(&up->mtext, p->mtext, err))
391 static inline int get_compat_msqid64(struct msqid64_ds *m64,
392 struct compat_msqid64_ds __user *up64)
396 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
398 err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
399 err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
403 static inline int get_compat_msqid(struct msqid64_ds *m,
404 struct compat_msqid_ds __user *up)
408 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
410 err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
411 err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
415 static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
416 struct compat_msqid64_ds __user __user *up64)
420 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
422 err = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
423 err |= __put_user(m64->msg_stime, &up64->msg_stime);
424 err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
425 err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
426 err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
427 err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
428 err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
429 err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
430 err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
434 static inline int put_compat_msqid_ds(struct msqid64_ds *m,
435 struct compat_msqid_ds __user *up)
439 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
441 err = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
442 err |= __put_user(m->msg_stime, &up->msg_stime);
443 err |= __put_user(m->msg_rtime, &up->msg_rtime);
444 err |= __put_user(m->msg_ctime, &up->msg_ctime);
445 err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
446 err |= __put_user(m->msg_qnum, &up->msg_qnum);
447 err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
448 err |= __put_user(m->msg_lspid, &up->msg_lspid);
449 err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
453 static inline int do_msgctl(int first, int second, void __user *buf)
460 err = sys_msgctl(first, second, buf);
466 long compat_sys_msgctl(int first, int second, void __user *uptr)
469 struct msqid64_ds m64;
470 int version = compat_ipc_parse_version(&second);
472 switch (second & (~IPC_64)) {
476 err = sys_msgctl(first, second, uptr);
480 if (version == IPC_64) {
481 err = get_compat_msqid64(&m64, uptr);
483 err = get_compat_msqid(&m64, uptr);
488 err = do_msgctl(first, second, &m64);
493 err = do_msgctl(first, second, &m64);
497 if (version == IPC_64) {
498 err2 = put_compat_msqid64_ds(&m64, uptr);
500 err2 = put_compat_msqid_ds(&m64, uptr);
513 long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
518 compat_ulong_t __user *uaddr;
522 err = do_shmat(first, uptr, second, &raddr);
525 uaddr = compat_ptr(third);
526 return put_user(raddr, uaddr);
529 static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
530 struct compat_shmid64_ds __user *up64)
532 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
534 return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
537 static inline int get_compat_shmid_ds(struct shmid64_ds *s,
538 struct compat_shmid_ds __user *up)
540 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
542 return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
545 static inline int put_compat_shmid64_ds(struct shmid64_ds *s64,
546 struct compat_shmid64_ds __user *up64)
550 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
552 err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
553 err |= __put_user(s64->shm_atime, &up64->shm_atime);
554 err |= __put_user(s64->shm_dtime, &up64->shm_dtime);
555 err |= __put_user(s64->shm_ctime, &up64->shm_ctime);
556 err |= __put_user(s64->shm_segsz, &up64->shm_segsz);
557 err |= __put_user(s64->shm_nattch, &up64->shm_nattch);
558 err |= __put_user(s64->shm_cpid, &up64->shm_cpid);
559 err |= __put_user(s64->shm_lpid, &up64->shm_lpid);
563 static inline int put_compat_shmid_ds(struct shmid64_ds *s,
564 struct compat_shmid_ds __user *up)
568 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
570 err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
571 err |= __put_user(s->shm_atime, &up->shm_atime);
572 err |= __put_user(s->shm_dtime, &up->shm_dtime);
573 err |= __put_user(s->shm_ctime, &up->shm_ctime);
574 err |= __put_user(s->shm_segsz, &up->shm_segsz);
575 err |= __put_user(s->shm_nattch, &up->shm_nattch);
576 err |= __put_user(s->shm_cpid, &up->shm_cpid);
577 err |= __put_user(s->shm_lpid, &up->shm_lpid);
581 static inline int put_compat_shminfo64(struct shminfo64 *smi,
582 struct compat_shminfo64 __user *up64)
586 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
588 err = __put_user(smi->shmmax, &up64->shmmax);
589 err |= __put_user(smi->shmmin, &up64->shmmin);
590 err |= __put_user(smi->shmmni, &up64->shmmni);
591 err |= __put_user(smi->shmseg, &up64->shmseg);
592 err |= __put_user(smi->shmall, &up64->shmall);
596 static inline int put_compat_shminfo(struct shminfo64 *smi,
597 struct shminfo __user *up)
601 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
603 err = __put_user(smi->shmmax, &up->shmmax);
604 err |= __put_user(smi->shmmin, &up->shmmin);
605 err |= __put_user(smi->shmmni, &up->shmmni);
606 err |= __put_user(smi->shmseg, &up->shmseg);
607 err |= __put_user(smi->shmall, &up->shmall);
610 static inline int put_compat_shm_info(struct shm_info *si,
611 struct compat_shm_info __user *uip)
615 if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)))
617 err = __put_user(si->used_ids, &uip->used_ids);
618 err |= __put_user(si->shm_tot, &uip->shm_tot);
619 err |= __put_user(si->shm_rss, &uip->shm_rss);
620 err |= __put_user(si->shm_swp, &uip->shm_swp);
621 err |= __put_user(si->swap_attempts, &uip->swap_attempts);
622 err |= __put_user(si->swap_successes, &uip->swap_successes);
626 static inline int do_shmctl(int shmid, int cmd, void *buf)
633 err = sys_shmctl(shmid, cmd, buf);
639 long compat_sys_shmctl(int first, int second, void __user *uptr)
641 struct shmid64_ds s64;
642 struct shminfo64 smi;
645 int version = compat_ipc_parse_version(&second);
647 switch (second & (~IPC_64)) {
651 err = sys_shmctl(first, second, uptr);
655 err = do_shmctl(first, second, &smi);
659 if (version == IPC_64) {
660 err2 = put_compat_shminfo64(&smi, uptr);
662 err2 = put_compat_shminfo(&smi, uptr);
670 if (version == IPC_64) {
671 err = get_compat_shmid64_ds(&s64, uptr);
673 err = get_compat_shmid_ds(&s64, uptr);
678 err = do_shmctl(first, second, &s64);
683 err = do_shmctl(first, second, &s64);
687 if (version == IPC_64) {
688 err2 = put_compat_shmid64_ds(&s64, uptr);
690 err2 = put_compat_shmid_ds(&s64, uptr);
697 err = do_shmctl(first, second, &si);
700 err2 = put_compat_shm_info(&si, uptr);
712 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
713 unsigned nsops, const struct compat_timespec __user *timeout)
715 struct timespec ts, __user *ts64;
717 /* parameter checking precedence should mirror sys_semtimedop() */
718 if (nsops < 1 || semid < 0)
720 if (nsops > sc_semopm)
722 if (!access_ok(VERIFY_READ, tsems, nsops * sizeof(struct sembuf)))
725 return sys_semtimedop(semid, tsems, nsops, 0);
727 ts64 = compat_alloc_user_space(sizeof(*ts64));
728 if (get_compat_timespec(&ts, timeout))
730 if (copy_to_user(ts64, &ts, sizeof(ts)))
733 return sys_semtimedop(semid, tsems, nsops, ts64);