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/syscalls.h>
30 #include <linux/ptrace.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 #ifdef CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION
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
134 /* With the asm-generic APIs, we always use the 64-bit versions. */
139 static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64,
140 struct compat_ipc64_perm __user *up64)
144 err = __get_user(p64->uid, &up64->uid);
145 err |= __get_user(p64->gid, &up64->gid);
146 err |= __get_user(p64->mode, &up64->mode);
150 static inline int __get_compat_ipc_perm(struct ipc64_perm *p,
151 struct compat_ipc_perm __user *up)
155 err = __get_user(p->uid, &up->uid);
156 err |= __get_user(p->gid, &up->gid);
157 err |= __get_user(p->mode, &up->mode);
161 static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64,
162 struct compat_ipc64_perm __user *up64)
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);
176 static inline int __put_compat_ipc_perm(struct ipc64_perm *p,
177 struct compat_ipc_perm __user *up)
183 err = __put_user(p->key, &up->key);
185 err |= __put_user(u, &up->uid);
187 err |= __put_user(g, &up->gid);
189 err |= __put_user(u, &up->cuid);
191 err |= __put_user(g, &up->cgid);
192 err |= __put_user(p->mode, &up->mode);
193 err |= __put_user(p->seq, &up->seq);
197 static inline int get_compat_semid64_ds(struct semid64_ds *s64,
198 struct compat_semid64_ds __user *up64)
200 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
202 return __get_compat_ipc64_perm(&s64->sem_perm, &up64->sem_perm);
205 static inline int get_compat_semid_ds(struct semid64_ds *s,
206 struct compat_semid_ds __user *up)
208 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
210 return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
213 static inline int put_compat_semid64_ds(struct semid64_ds *s64,
214 struct compat_semid64_ds __user *up64)
218 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
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);
227 static inline int put_compat_semid_ds(struct semid64_ds *s,
228 struct compat_semid_ds __user *up)
232 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
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);
241 static long do_compat_semctl(int first, int second, int third, u32 pad)
243 unsigned long fourth;
245 struct semid64_ds s64;
246 struct semid64_ds __user *up64;
247 int version = compat_ipc_parse_version(&third);
249 memset(&s64, 0, sizeof(s64));
251 if ((third & (~IPC_64)) == SETVAL)
253 fourth = (unsigned long)pad << 32;
258 fourth = (unsigned long)compat_ptr(pad);
259 switch (third & (~IPC_64)) {
270 err = sys_semctl(first, second, third, fourth);
275 up64 = compat_alloc_user_space(sizeof(s64));
276 fourth = (unsigned long)up64;
277 err = sys_semctl(first, second, third, fourth);
280 if (copy_from_user(&s64, up64, sizeof(s64)))
282 else if (version == IPC_64)
283 err2 = put_compat_semid64_ds(&s64, compat_ptr(pad));
285 err2 = put_compat_semid_ds(&s64, compat_ptr(pad));
291 if (version == IPC_64)
292 err = get_compat_semid64_ds(&s64, compat_ptr(pad));
294 err = get_compat_semid_ds(&s64, compat_ptr(pad));
296 up64 = compat_alloc_user_space(sizeof(s64));
297 if (copy_to_user(up64, &s64, sizeof(s64)))
302 fourth = (unsigned long)up64;
303 err = sys_semctl(first, second, third, fourth);
313 static long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz)
315 struct compat_msgbuf __user *msgp = dest;
318 if (put_user(msg->m_type, &msgp->mtype))
321 msgsz = (bufsz > msg->m_ts) ? msg->m_ts : bufsz;
322 if (store_msg(msgp->mtext, msg, msgsz))
327 #ifndef COMPAT_SHMLBA
328 #define COMPAT_SHMLBA SHMLBA
331 #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
332 COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
333 u32, third, compat_uptr_t, ptr, u32, fifth)
338 version = call >> 16; /* hack for backward compatibility */
343 /* struct sembuf is the same on 32 and 64bit :)) */
344 return sys_semtimedop(first, compat_ptr(ptr), second, NULL);
346 return compat_sys_semtimedop(first, compat_ptr(ptr), second,
349 return sys_semget(first, second, third);
353 if (get_user(pad, (u32 __user *) compat_ptr(ptr)))
355 return do_compat_semctl(first, second, third, pad);
358 struct compat_msgbuf __user *up = compat_ptr(ptr);
361 if (first < 0 || second < 0)
364 if (get_user(type, &up->mtype))
367 return do_msgsnd(first, type, up->mtext, second, third);
370 void __user *uptr = compat_ptr(ptr);
372 if (first < 0 || second < 0)
376 struct compat_ipc_kludge ipck;
379 if (copy_from_user(&ipck, uptr, sizeof(ipck)))
381 uptr = compat_ptr(ipck.msgp);
384 return do_msgrcv(first, uptr, second, (s32)fifth, third,
388 return sys_msgget(first, second);
390 return compat_sys_msgctl(first, second, compat_ptr(ptr));
398 err = do_shmat(first, compat_ptr(ptr), second, &raddr,
402 return put_user(raddr, (compat_ulong_t *)compat_ptr(third));
405 return sys_shmdt(compat_ptr(ptr));
407 return sys_shmget(first, (unsigned)second, third);
409 return compat_sys_shmctl(first, second, compat_ptr(ptr));
416 COMPAT_SYSCALL_DEFINE4(semctl, int, semid, int, semnum, int, cmd, int, arg)
418 return do_compat_semctl(semid, semnum, cmd, arg);
421 COMPAT_SYSCALL_DEFINE4(msgsnd, int, msqid, compat_uptr_t, msgp,
422 compat_ssize_t, msgsz, int, msgflg)
424 struct compat_msgbuf __user *up = compat_ptr(msgp);
427 if (get_user(mtype, &up->mtype))
429 return do_msgsnd(msqid, mtype, up->mtext, (ssize_t)msgsz, msgflg);
432 COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp,
433 compat_ssize_t, msgsz, long, msgtyp, int, msgflg)
435 return do_msgrcv(msqid, compat_ptr(msgp), (ssize_t)msgsz, msgtyp,
436 msgflg, compat_do_msg_fill);
439 static inline int get_compat_msqid64(struct msqid64_ds *m64,
440 struct compat_msqid64_ds __user *up64)
444 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
446 err = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
447 err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
451 static inline int get_compat_msqid(struct msqid64_ds *m,
452 struct compat_msqid_ds __user *up)
456 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
458 err = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
459 err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
463 static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
464 struct compat_msqid64_ds __user *up64)
468 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
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);
482 static inline int put_compat_msqid_ds(struct msqid64_ds *m,
483 struct compat_msqid_ds __user *up)
487 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
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);
501 long compat_sys_msgctl(int first, int second, void __user *uptr)
504 struct msqid64_ds m64;
505 int version = compat_ipc_parse_version(&second);
508 memset(&m64, 0, sizeof(m64));
510 switch (second & (~IPC_64)) {
514 err = sys_msgctl(first, second, uptr);
518 if (version == IPC_64)
519 err = get_compat_msqid64(&m64, uptr);
521 err = get_compat_msqid(&m64, uptr);
525 p = compat_alloc_user_space(sizeof(m64));
526 if (copy_to_user(p, &m64, sizeof(m64)))
529 err = sys_msgctl(first, second, p);
534 p = compat_alloc_user_space(sizeof(m64));
535 err = sys_msgctl(first, second, p);
538 if (copy_from_user(&m64, p, sizeof(m64)))
540 else if (version == IPC_64)
541 err2 = put_compat_msqid64_ds(&m64, uptr);
543 err2 = put_compat_msqid_ds(&m64, uptr);
555 COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg)
560 err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA);
563 force_successful_syscall_return();
567 static inline int get_compat_shmid64_ds(struct shmid64_ds *s64,
568 struct compat_shmid64_ds __user *up64)
570 if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
572 return __get_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
575 static inline int get_compat_shmid_ds(struct shmid64_ds *s,
576 struct compat_shmid_ds __user *up)
578 if (!access_ok(VERIFY_READ, up, sizeof(*up)))
580 return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
583 static inline int put_compat_shmid64_ds(struct shmid64_ds *s64,
584 struct compat_shmid64_ds __user *up64)
588 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
590 err = __put_compat_ipc64_perm(&s64->shm_perm, &up64->shm_perm);
591 err |= __put_user(s64->shm_atime, &up64->shm_atime);
592 err |= __put_user(s64->shm_dtime, &up64->shm_dtime);
593 err |= __put_user(s64->shm_ctime, &up64->shm_ctime);
594 err |= __put_user(s64->shm_segsz, &up64->shm_segsz);
595 err |= __put_user(s64->shm_nattch, &up64->shm_nattch);
596 err |= __put_user(s64->shm_cpid, &up64->shm_cpid);
597 err |= __put_user(s64->shm_lpid, &up64->shm_lpid);
601 static inline int put_compat_shmid_ds(struct shmid64_ds *s,
602 struct compat_shmid_ds __user *up)
606 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
608 err = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
609 err |= __put_user(s->shm_atime, &up->shm_atime);
610 err |= __put_user(s->shm_dtime, &up->shm_dtime);
611 err |= __put_user(s->shm_ctime, &up->shm_ctime);
612 err |= __put_user(s->shm_segsz, &up->shm_segsz);
613 err |= __put_user(s->shm_nattch, &up->shm_nattch);
614 err |= __put_user(s->shm_cpid, &up->shm_cpid);
615 err |= __put_user(s->shm_lpid, &up->shm_lpid);
619 static inline int put_compat_shminfo64(struct shminfo64 *smi,
620 struct compat_shminfo64 __user *up64)
624 if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
626 if (smi->shmmax > INT_MAX)
627 smi->shmmax = INT_MAX;
628 err = __put_user(smi->shmmax, &up64->shmmax);
629 err |= __put_user(smi->shmmin, &up64->shmmin);
630 err |= __put_user(smi->shmmni, &up64->shmmni);
631 err |= __put_user(smi->shmseg, &up64->shmseg);
632 err |= __put_user(smi->shmall, &up64->shmall);
636 static inline int put_compat_shminfo(struct shminfo64 *smi,
637 struct shminfo __user *up)
641 if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
643 if (smi->shmmax > INT_MAX)
644 smi->shmmax = INT_MAX;
645 err = __put_user(smi->shmmax, &up->shmmax);
646 err |= __put_user(smi->shmmin, &up->shmmin);
647 err |= __put_user(smi->shmmni, &up->shmmni);
648 err |= __put_user(smi->shmseg, &up->shmseg);
649 err |= __put_user(smi->shmall, &up->shmall);
653 static inline int put_compat_shm_info(struct shm_info __user *ip,
654 struct compat_shm_info __user *uip)
659 if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
660 copy_from_user(&si, ip, sizeof(si)))
662 err = __put_user(si.used_ids, &uip->used_ids);
663 err |= __put_user(si.shm_tot, &uip->shm_tot);
664 err |= __put_user(si.shm_rss, &uip->shm_rss);
665 err |= __put_user(si.shm_swp, &uip->shm_swp);
666 err |= __put_user(si.swap_attempts, &uip->swap_attempts);
667 err |= __put_user(si.swap_successes, &uip->swap_successes);
671 long compat_sys_shmctl(int first, int second, void __user *uptr)
674 struct shmid64_ds s64;
675 struct shminfo64 smi;
677 int version = compat_ipc_parse_version(&second);
679 memset(&s64, 0, sizeof(s64));
681 switch (second & (~IPC_64)) {
685 err = sys_shmctl(first, second, uptr);
689 p = compat_alloc_user_space(sizeof(smi));
690 err = sys_shmctl(first, second, p);
693 if (copy_from_user(&smi, p, sizeof(smi)))
695 else if (version == IPC_64)
696 err2 = put_compat_shminfo64(&smi, uptr);
698 err2 = put_compat_shminfo(&smi, uptr);
705 if (version == IPC_64)
706 err = get_compat_shmid64_ds(&s64, uptr);
708 err = get_compat_shmid_ds(&s64, uptr);
712 p = compat_alloc_user_space(sizeof(s64));
713 if (copy_to_user(p, &s64, sizeof(s64)))
716 err = sys_shmctl(first, second, p);
721 p = compat_alloc_user_space(sizeof(s64));
722 err = sys_shmctl(first, second, p);
725 if (copy_from_user(&s64, p, sizeof(s64)))
727 else if (version == IPC_64)
728 err2 = put_compat_shmid64_ds(&s64, uptr);
730 err2 = put_compat_shmid_ds(&s64, uptr);
736 p = compat_alloc_user_space(sizeof(struct shm_info));
737 err = sys_shmctl(first, second, p);
740 err2 = put_compat_shm_info(p, uptr);
752 long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
753 unsigned nsops, const struct compat_timespec __user *timeout)
755 struct timespec __user *ts64 = NULL;
758 ts64 = compat_alloc_user_space(sizeof(*ts64));
759 if (get_compat_timespec(&ts, timeout))
761 if (copy_to_user(ts64, &ts, sizeof(ts)))
764 return sys_semtimedop(semid, tsems, nsops, ts64);