[linux-2.6-block.git] / ipc / compat.c

/*
 * 32 bit compatibility code for System V IPC
 *
 * Copyright (C) 1997,1998	Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 * Copyright (C) 1997		David S. Miller (davem@caip.rutgers.edu)
 * Copyright (C) 1999		Arun Sharma <arun.sharma@intel.com>
 * Copyright (C) 2000		VA Linux Co
 * Copyright (C) 2000		Don Dugger <n0ano@valinux.com>
 * Copyright (C) 2000           Hewlett-Packard Co.
 * Copyright (C) 2000           David Mosberger-Tang <davidm@hpl.hp.com>
 * Copyright (C) 2000           Gerhard Tonn (ton@de.ibm.com)
 * Copyright (C) 2000-2002      Andi Kleen, SuSE Labs (x86-64 port)
 * Copyright (C) 2000		Silicon Graphics, Inc.
 * Copyright (C) 2001		IBM
 * Copyright (C) 2004		IBM Deutschland Entwicklung GmbH, IBM Corporation
 * Copyright (C) 2004		Arnd Bergmann (arnd@arndb.de)
 *
 * This code is collected from the versions for sparc64, mips64, s390x, ia64,
 * ppc64 and x86_64, all of which are based on the original sparc64 version
 * by Jakub Jelinek.
 *
 */
#include <linux/compat.h>
#include <linux/errno.h>
#include <linux/highuid.h>
#include <linux/init.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/syscalls.h>
#include <linux/ptrace.h>

#include <linux/mutex.h>
#include <linux/uaccess.h>

#include "util.h"

struct compat_msgbuf {
	compat_long_t mtype;
	char mtext[1];
};

struct compat_semid_ds {
	struct compat_ipc_perm sem_perm;
	compat_time_t sem_otime;
	compat_time_t sem_ctime;
	compat_uptr_t sem_base;
	compat_uptr_t sem_pending;
	compat_uptr_t sem_pending_last;
	compat_uptr_t undo;
	unsigned short sem_nsems;
};

struct compat_ipc_kludge {
	compat_uptr_t msgp;
	compat_long_t msgtyp;
};

static inline int __compat_ipc_parse_version(int *cmd)
{
#ifdef	CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION
	int version = *cmd & IPC_64;

	/* this is tricky: architectures that have support for the old
	 * ipc structures in 64 bit binaries need to have IPC_64 set
	 * in cmd, the others need to have it cleared */
#ifndef ipc_parse_version
	*cmd |= IPC_64;
#else
	*cmd &= ~IPC_64;
#endif
	return version;
#else
	/* With the asm-generic APIs, we always use the 64-bit versions. */
	return IPC_64;
#endif
}

static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64,
					  struct compat_ipc64_perm __user *up64)
{
	int err;

	err  = __get_user(p64->uid, &up64->uid);
	err |= __get_user(p64->gid, &up64->gid);
	err |= __get_user(p64->mode, &up64->mode);
	return err;
}

static inline int __get_compat_ipc_perm(struct ipc64_perm *p,
					struct compat_ipc_perm __user *up)
{
	int err;

	err  = __get_user(p->uid, &up->uid);
	err |= __get_user(p->gid, &up->gid);
	err |= __get_user(p->mode, &up->mode);
	return err;
}

static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64,
					  struct compat_ipc64_perm __user *up64)
{
	int err;

	err  = __put_user(p64->key, &up64->key);
	err |= __put_user(p64->uid, &up64->uid);
	err |= __put_user(p64->gid, &up64->gid);
	err |= __put_user(p64->cuid, &up64->cuid);
	err |= __put_user(p64->cgid, &up64->cgid);
	err |= __put_user(p64->mode, &up64->mode);
	err |= __put_user(p64->seq, &up64->seq);
	return err;
}

static inline int __put_compat_ipc_perm(struct ipc64_perm *p,
					struct compat_ipc_perm __user *uip)
{
	int err;
	__compat_uid_t u;
	__compat_gid_t g;

	err  = __put_user(p->key, &uip->key);
	SET_UID(u, p->uid);
	err |= __put_user(u, &uip->uid);
	SET_GID(g, p->gid);
	err |= __put_user(g, &uip->gid);
	SET_UID(u, p->cuid);
	err |= __put_user(u, &uip->cuid);
	SET_GID(g, p->cgid);
	err |= __put_user(g, &uip->cgid);
	err |= __put_user(p->mode, &uip->mode);
	err |= __put_user(p->seq, &uip->seq);
	return err;
}

static inline int get_compat_semid64_ds(struct semid64_ds *sem64,
					struct compat_semid64_ds __user *up64)
{
	if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
		return -EFAULT;
	return __get_compat_ipc64_perm(&sem64->sem_perm, &up64->sem_perm);
}

static inline int get_compat_semid_ds(struct semid64_ds *s,
				      struct compat_semid_ds __user *up)
{
	if (!access_ok(VERIFY_READ, up, sizeof(*up)))
		return -EFAULT;
	return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
}

static inline int put_compat_semid64_ds(struct semid64_ds *sem64,
					struct compat_semid64_ds __user *up64)
{
	int err;

	if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
		return -EFAULT;
	err  = __put_compat_ipc64_perm(&sem64->sem_perm, &up64->sem_perm);
	err |= __put_user(sem64->sem_otime, &up64->sem_otime);
	err |= __put_user(sem64->sem_ctime, &up64->sem_ctime);
	err |= __put_user(sem64->sem_nsems, &up64->sem_nsems);
	return err;
}

static inline int put_compat_semid_ds(struct semid64_ds *s,
				      struct compat_semid_ds __user *up)
{
	int err;

	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
		return -EFAULT;
	err  = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
	err |= __put_user(s->sem_otime, &up->sem_otime);
	err |= __put_user(s->sem_ctime, &up->sem_ctime);
	err |= __put_user(s->sem_nsems, &up->sem_nsems);
	return err;
}

static long do_compat_semctl(int first, int second, int third, u32 pad)
{
	unsigned long fourth;
	int err, err2;
	struct semid64_ds sem64;
	struct semid64_ds __user *up64;
	int version = __compat_ipc_parse_version(&third);

	memset(&sem64, 0, sizeof(sem64));

	if ((third & (~IPC_64)) == SETVAL)
#ifdef __BIG_ENDIAN
		fourth = (unsigned long)pad << 32;
#else
		fourth = pad;
#endif
	else
		fourth = (unsigned long)compat_ptr(pad);
	switch (third & (~IPC_64)) {
	case IPC_INFO:
	case IPC_RMID:
	case SEM_INFO:
	case GETVAL:
	case GETPID:
	case GETNCNT:
	case GETZCNT:
	case GETALL:
	case SETVAL:
	case SETALL:
		err = sys_semctl(first, second, third, fourth);
		break;

	case IPC_STAT:
	case SEM_STAT:
		up64 = compat_alloc_user_space(sizeof(sem64));
		fourth = (unsigned long)up64;
		err = sys_semctl(first, second, third, fourth);
		if (err < 0)
			break;
		if (copy_from_user(&sem64, up64, sizeof(sem64)))
			err2 = -EFAULT;
		else if (version == IPC_64)
			err2 = put_compat_semid64_ds(&sem64, compat_ptr(pad));
		else
			err2 = put_compat_semid_ds(&sem64, compat_ptr(pad));
		if (err2)
			err = -EFAULT;
		break;

	case IPC_SET:
		if (version == IPC_64)
			err = get_compat_semid64_ds(&sem64, compat_ptr(pad));
		else
			err = get_compat_semid_ds(&sem64, compat_ptr(pad));

		up64 = compat_alloc_user_space(sizeof(sem64));
		if (copy_to_user(up64, &sem64, sizeof(sem64)))
			err = -EFAULT;
		if (err)
			break;

		fourth = (unsigned long)up64;
		err = sys_semctl(first, second, third, fourth);
		break;

	default:
		err = -EINVAL;
		break;
	}
	return err;
}

static long compat_do_msg_fill(void __user *dest, struct msg_msg *msg, size_t bufsz)
{
	struct compat_msgbuf __user *msgp = dest;
	size_t msgsz;

	if (put_user(msg->m_type, &msgp->mtype))
		return -EFAULT;

	msgsz = (bufsz > msg->m_ts) ? msg->m_ts : bufsz;
	if (store_msg(msgp->mtext, msg, msgsz))
		return -EFAULT;
	return msgsz;
}

#ifndef COMPAT_SHMLBA
#define COMPAT_SHMLBA	SHMLBA
#endif

#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
	u32, third, compat_uptr_t, ptr, u32, fifth)
{
	int version;
	u32 pad;

	version = call >> 16; /* hack for backward compatibility */
	call &= 0xffff;

	switch (call) {
	case SEMOP:
		/* struct sembuf is the same on 32 and 64bit :)) */
		return sys_semtimedop(first, compat_ptr(ptr), second, NULL);
	case SEMTIMEDOP:
		return compat_sys_semtimedop(first, compat_ptr(ptr), second,
						compat_ptr(fifth));
	case SEMGET:
		return sys_semget(first, second, third);
	case SEMCTL:
		if (!ptr)
			return -EINVAL;
		if (get_user(pad, (u32 __user *) compat_ptr(ptr)))
			return -EFAULT;
		return do_compat_semctl(first, second, third, pad);

	case MSGSND: {
		struct compat_msgbuf __user *up = compat_ptr(ptr);
		compat_long_t type;

		if (first < 0 || second < 0)
			return -EINVAL;

		if (get_user(type, &up->mtype))
			return -EFAULT;

		return do_msgsnd(first, type, up->mtext, second, third);
	}
	case MSGRCV: {
		void __user *uptr = compat_ptr(ptr);

		if (first < 0 || second < 0)
			return -EINVAL;

		if (!version) {
			struct compat_ipc_kludge ipck;
			if (!uptr)
				return -EINVAL;
			if (copy_from_user(&ipck, uptr, sizeof(ipck)))
				return -EFAULT;
			uptr = compat_ptr(ipck.msgp);
			fifth = ipck.msgtyp;
		}
		return do_msgrcv(first, uptr, second, (s32)fifth, third,
				 compat_do_msg_fill);
	}
	case MSGGET:
		return sys_msgget(first, second);
	case MSGCTL:
		return compat_sys_msgctl(first, second, compat_ptr(ptr));

	case SHMAT: {
		int err;
		unsigned long raddr;

		if (version == 1)
			return -EINVAL;
		err = do_shmat(first, compat_ptr(ptr), second, &raddr,
			       COMPAT_SHMLBA);
		if (err < 0)
			return err;
		return put_user(raddr, (compat_ulong_t *)compat_ptr(third));
	}
	case SHMDT:
		return sys_shmdt(compat_ptr(ptr));
	case SHMGET:
		return sys_shmget(first, (unsigned)second, third);
	case SHMCTL:
		return compat_sys_shmctl(first, second, compat_ptr(ptr));
	}

	return -ENOSYS;
}
#endif

COMPAT_SYSCALL_DEFINE4(semctl, int, semid, int, semnum, int, cmd, int, arg)
{
	return do_compat_semctl(semid, semnum, cmd, arg);
}

COMPAT_SYSCALL_DEFINE4(msgsnd, int, msqid, compat_uptr_t, msgp,
		       compat_ssize_t, msgsz, int, msgflg)
{
	struct compat_msgbuf __user *up = compat_ptr(msgp);
	compat_long_t mtype;

	if (get_user(mtype, &up->mtype))
		return -EFAULT;
	return do_msgsnd(msqid, mtype, up->mtext, (ssize_t)msgsz, msgflg);
}

COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp,
		       compat_ssize_t, msgsz, compat_long_t, msgtyp, int, msgflg)
{
	return do_msgrcv(msqid, compat_ptr(msgp), (ssize_t)msgsz, (long)msgtyp,
			 msgflg, compat_do_msg_fill);
}

COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg)
{
	unsigned long ret;
	long err;

	err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA);
	if (err)
		return err;
	force_successful_syscall_return();
	return (long)ret;
}

COMPAT_SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsems,
		       unsigned, nsops,
		       const struct compat_timespec __user *, timeout)
{
	struct timespec __user *ts64;
	if (compat_convert_timespec(&ts64, timeout))
		return -EFAULT;
	return sys_semtimedop(semid, tsems, nsops, ts64);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* 32 bit compatibility code for System V IPC
	3	*
	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)
	17	*
	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
	20	* by Jakub Jelinek.
	21	*
	22	*/
	23	#include <linux/compat.h>
1da177e4 LT	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>
1da177e4	29	#include <linux/syscalls.h>
48b25c43	30	#include <linux/ptrace.h>
1da177e4	31
5f921ae9	32	#include <linux/mutex.h>
7153e402	33	#include <linux/uaccess.h>
1da177e4 LT	34
	35	#include "util.h"
	36
	37	struct compat_msgbuf {
	38	compat_long_t mtype;
	39	char mtext[1];
	40	};
	41
1da177e4 LT	42	struct compat_semid_ds {
	43	struct compat_ipc_perm sem_perm;
	44	compat_time_t sem_otime;
	45	compat_time_t sem_ctime;
	46	compat_uptr_t sem_base;
	47	compat_uptr_t sem_pending;
	48	compat_uptr_t sem_pending_last;
	49	compat_uptr_t undo;
	50	unsigned short sem_nsems;
	51	};
	52
1da177e4 LT	53	struct compat_ipc_kludge {
	54	compat_uptr_t msgp;
	55	compat_long_t msgtyp;
	56	};
	57
553f770e	58	static inline int __compat_ipc_parse_version(int *cmd)
1da177e4	59	{
c1d7e01d	60	#ifdef CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION
1da177e4 LT	61	int version = *cmd & IPC_64;
	62
	63	/* this is tricky: architectures that have support for the old
	64	* ipc structures in 64 bit binaries need to have IPC_64 set
	65	* in cmd, the others need to have it cleared */
	66	#ifndef ipc_parse_version
	67	*cmd \|= IPC_64;
	68	#else
	69	*cmd &= ~IPC_64;
	70	#endif
	71	return version;
48b25c43 CM	72	#else
	73	/* With the asm-generic APIs, we always use the 64-bit versions. */
	74	return IPC_64;
	75	#endif
1da177e4 LT	76	}
	77
	78	static inline int __get_compat_ipc64_perm(struct ipc64_perm *p64,
	79	struct compat_ipc64_perm __user *up64)
	80	{
	81	int err;
	82
	83	err = __get_user(p64->uid, &up64->uid);
	84	err \|= __get_user(p64->gid, &up64->gid);
	85	err \|= __get_user(p64->mode, &up64->mode);
	86	return err;
	87	}
	88
	89	static inline int __get_compat_ipc_perm(struct ipc64_perm *p,
	90	struct compat_ipc_perm __user *up)
	91	{
	92	int err;
	93
	94	err = __get_user(p->uid, &up->uid);
	95	err \|= __get_user(p->gid, &up->gid);
	96	err \|= __get_user(p->mode, &up->mode);
	97	return err;
	98	}
	99
	100	static inline int __put_compat_ipc64_perm(struct ipc64_perm *p64,
	101	struct compat_ipc64_perm __user *up64)
	102	{
	103	int err;
	104
	105	err = __put_user(p64->key, &up64->key);
	106	err \|= __put_user(p64->uid, &up64->uid);
	107	err \|= __put_user(p64->gid, &up64->gid);
	108	err \|= __put_user(p64->cuid, &up64->cuid);
	109	err \|= __put_user(p64->cgid, &up64->cgid);
	110	err \|= __put_user(p64->mode, &up64->mode);
	111	err \|= __put_user(p64->seq, &up64->seq);
	112	return err;
	113	}
	114
	115	static inline int __put_compat_ipc_perm(struct ipc64_perm *p,
0d5e7580	116	struct compat_ipc_perm __user *uip)
1da177e4 LT	117	{
1da177e4 LT	118	int err;
202e5979 SR	119	__compat_uid_t u;
202e5979 SR	120	__compat_gid_t g;
1da177e4	121
0d5e7580	122	err = __put_user(p->key, &uip->key);
1da177e4	123	SET_UID(u, p->uid);
0d5e7580	124	err \|= __put_user(u, &uip->uid);
1da177e4	125	SET_GID(g, p->gid);
0d5e7580	126	err \|= __put_user(g, &uip->gid);
1da177e4	127	SET_UID(u, p->cuid);
0d5e7580	128	err \|= __put_user(u, &uip->cuid);
1da177e4	129	SET_GID(g, p->cgid);
0d5e7580 MR	130	err \|= __put_user(g, &uip->cgid);
	131	err \|= __put_user(p->mode, &uip->mode);
	132	err \|= __put_user(p->seq, &uip->seq);
1da177e4 LT	133	return err;
	134	}
	135
0d5e7580	136	static inline int get_compat_semid64_ds(struct semid64_ds *sem64,
1da177e4 LT	137	struct compat_semid64_ds __user *up64)
1da177e4 LT	138	{
239521f3	139	if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
1da177e4	140	return -EFAULT;
0d5e7580	141	return __get_compat_ipc64_perm(&sem64->sem_perm, &up64->sem_perm);
1da177e4 LT	142	}
	143
	144	static inline int get_compat_semid_ds(struct semid64_ds *s,
	145	struct compat_semid_ds __user *up)
	146	{
239521f3	147	if (!access_ok(VERIFY_READ, up, sizeof(*up)))
1da177e4 LT	148	return -EFAULT;
	149	return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
	150	}
	151
0d5e7580	152	static inline int put_compat_semid64_ds(struct semid64_ds *sem64,
1da177e4 LT	153	struct compat_semid64_ds __user *up64)
	154	{
	155	int err;
	156
239521f3	157	if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
1da177e4	158	return -EFAULT;
0d5e7580 MR	159	err = __put_compat_ipc64_perm(&sem64->sem_perm, &up64->sem_perm);
	160	err \|= __put_user(sem64->sem_otime, &up64->sem_otime);
	161	err \|= __put_user(sem64->sem_ctime, &up64->sem_ctime);
	162	err \|= __put_user(sem64->sem_nsems, &up64->sem_nsems);
1da177e4 LT	163	return err;
	164	}
	165
	166	static inline int put_compat_semid_ds(struct semid64_ds *s,
	167	struct compat_semid_ds __user *up)
	168	{
	169	int err;
	170
239521f3	171	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
d57d9731	172	return -EFAULT;
1da177e4 LT	173	err = __put_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
	174	err \|= __put_user(s->sem_otime, &up->sem_otime);
	175	err \|= __put_user(s->sem_ctime, &up->sem_ctime);
	176	err \|= __put_user(s->sem_nsems, &up->sem_nsems);
	177	return err;
	178	}
	179
48b25c43	180	static long do_compat_semctl(int first, int second, int third, u32 pad)
1da177e4	181	{
e1fd1f49	182	unsigned long fourth;
1da177e4	183	int err, err2;
0d5e7580	184	struct semid64_ds sem64;
1da177e4	185	struct semid64_ds __user *up64;
553f770e	186	int version = __compat_ipc_parse_version(&third);
1da177e4	187
0d5e7580	188	memset(&sem64, 0, sizeof(sem64));
03145beb	189
1da177e4	190	if ((third & (~IPC_64)) == SETVAL)
e1fd1f49 AV	191	#ifdef __BIG_ENDIAN
	192	fourth = (unsigned long)pad << 32;
	193	#else
	194	fourth = pad;
	195	#endif
1da177e4	196	else
e1fd1f49	197	fourth = (unsigned long)compat_ptr(pad);
1da177e4 LT	198	switch (third & (~IPC_64)) {
	199	case IPC_INFO:
	200	case IPC_RMID:
	201	case SEM_INFO:
	202	case GETVAL:
	203	case GETPID:
	204	case GETNCNT:
	205	case GETZCNT:
	206	case GETALL:
	207	case SETVAL:
	208	case SETALL:
	209	err = sys_semctl(first, second, third, fourth);
	210	break;
	211
	212	case IPC_STAT:
	213	case SEM_STAT:
0d5e7580	214	up64 = compat_alloc_user_space(sizeof(sem64));
e1fd1f49	215	fourth = (unsigned long)up64;
1da177e4 LT	216	err = sys_semctl(first, second, third, fourth);
	217	if (err < 0)
	218	break;
0d5e7580	219	if (copy_from_user(&sem64, up64, sizeof(sem64)))
1da177e4 LT	220	err2 = -EFAULT;
1da177e4 LT	221	else if (version == IPC_64)
0d5e7580	222	err2 = put_compat_semid64_ds(&sem64, compat_ptr(pad));
1da177e4	223	else
0d5e7580	224	err2 = put_compat_semid_ds(&sem64, compat_ptr(pad));
1da177e4 LT	225	if (err2)
	226	err = -EFAULT;
	227	break;
	228
	229	case IPC_SET:
3ab08fe2	230	if (version == IPC_64)
0d5e7580	231	err = get_compat_semid64_ds(&sem64, compat_ptr(pad));
3ab08fe2	232	else
0d5e7580	233	err = get_compat_semid_ds(&sem64, compat_ptr(pad));
3ab08fe2	234
0d5e7580 MR	235	up64 = compat_alloc_user_space(sizeof(sem64));
0d5e7580 MR	236	if (copy_to_user(up64, &sem64, sizeof(sem64)))
1da177e4 LT	237	err = -EFAULT;
	238	if (err)
	239	break;
	240
e1fd1f49	241	fourth = (unsigned long)up64;
1da177e4 LT	242	err = sys_semctl(first, second, third, fourth);
	243	break;
	244
	245	default:
	246	err = -EINVAL;
	247	break;
	248	}
	249	return err;
	250	}
	251
0e65a81b	252	static long compat_do_msg_fill(void __user dest, struct msg_msg msg, size_t bufsz)
f9dd87f4 SK	253	{
	254	struct compat_msgbuf __user *msgp = dest;
	255	size_t msgsz;
	256
	257	if (put_user(msg->m_type, &msgp->mtype))
	258	return -EFAULT;
	259
	260	msgsz = (bufsz > msg->m_ts) ? msg->m_ts : bufsz;
	261	if (store_msg(msgp->mtext, msg, msgsz))
	262	return -EFAULT;
	263	return msgsz;
	264	}
	265
0e65a81b AV	266	#ifndef COMPAT_SHMLBA
	267	#define COMPAT_SHMLBA SHMLBA
	268	#endif
56e41d3c	269
0e65a81b	270	#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
56e41d3c AV	271	COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
	272	u32, third, compat_uptr_t, ptr, u32, fifth)
	273	{
	274	int version;
0e65a81b	275	u32 pad;
56e41d3c AV	276
	277	version = call >> 16; /* hack for backward compatibility */
	278	call &= 0xffff;
	279
	280	switch (call) {
	281	case SEMOP:
	282	/* struct sembuf is the same on 32 and 64bit :)) */
	283	return sys_semtimedop(first, compat_ptr(ptr), second, NULL);
	284	case SEMTIMEDOP:
	285	return compat_sys_semtimedop(first, compat_ptr(ptr), second,
	286	compat_ptr(fifth));
	287	case SEMGET:
	288	return sys_semget(first, second, third);
	289	case SEMCTL:
0e65a81b AV	290	if (!ptr)
	291	return -EINVAL;
	292	if (get_user(pad, (u32 __user *) compat_ptr(ptr)))
	293	return -EFAULT;
	294	return do_compat_semctl(first, second, third, pad);
	295
	296	case MSGSND: {
	297	struct compat_msgbuf __user *up = compat_ptr(ptr);
	298	compat_long_t type;
	299
	300	if (first < 0 \|\| second < 0)
	301	return -EINVAL;
56e41d3c	302
0e65a81b AV	303	if (get_user(type, &up->mtype))
	304	return -EFAULT;
	305
	306	return do_msgsnd(first, type, up->mtext, second, third);
	307	}
	308	case MSGRCV: {
	309	void __user *uptr = compat_ptr(ptr);
	310
	311	if (first < 0 \|\| second < 0)
	312	return -EINVAL;
	313
	314	if (!version) {
	315	struct compat_ipc_kludge ipck;
	316	if (!uptr)
	317	return -EINVAL;
239521f3	318	if (copy_from_user(&ipck, uptr, sizeof(ipck)))
0e65a81b AV	319	return -EFAULT;
	320	uptr = compat_ptr(ipck.msgp);
	321	fifth = ipck.msgtyp;
	322	}
e7ca2552	323	return do_msgrcv(first, uptr, second, (s32)fifth, third,
0e65a81b AV	324	compat_do_msg_fill);
0e65a81b AV	325	}
56e41d3c AV	326	case MSGGET:
	327	return sys_msgget(first, second);
	328	case MSGCTL:
	329	return compat_sys_msgctl(first, second, compat_ptr(ptr));
	330
0e65a81b AV	331	case SHMAT: {
	332	int err;
	333	unsigned long raddr;
	334
	335	if (version == 1)
	336	return -EINVAL;
	337	err = do_shmat(first, compat_ptr(ptr), second, &raddr,
	338	COMPAT_SHMLBA);
	339	if (err < 0)
	340	return err;
	341	return put_user(raddr, (compat_ulong_t *)compat_ptr(third));
	342	}
56e41d3c AV	343	case SHMDT:
	344	return sys_shmdt(compat_ptr(ptr));
	345	case SHMGET:
	346	return sys_shmget(first, (unsigned)second, third);
	347	case SHMCTL:
	348	return compat_sys_shmctl(first, second, compat_ptr(ptr));
	349	}
	350
	351	return -ENOSYS;
	352	}
0e65a81b AV	353	#endif
	354
	355	COMPAT_SYSCALL_DEFINE4(semctl, int, semid, int, semnum, int, cmd, int, arg)
48b25c43 CM	356	{
	357	return do_compat_semctl(semid, semnum, cmd, arg);
	358	}
	359
0e65a81b AV	360	COMPAT_SYSCALL_DEFINE4(msgsnd, int, msqid, compat_uptr_t, msgp,
0e65a81b AV	361	compat_ssize_t, msgsz, int, msgflg)
48b25c43	362	{
0e65a81b	363	struct compat_msgbuf __user *up = compat_ptr(msgp);
48b25c43 CM	364	compat_long_t mtype;
48b25c43 CM	365
0e65a81b	366	if (get_user(mtype, &up->mtype))
48b25c43	367	return -EFAULT;
0e65a81b	368	return do_msgsnd(msqid, mtype, up->mtext, (ssize_t)msgsz, msgflg);
48b25c43 CM	369	}
48b25c43 CM	370
0e65a81b	371	COMPAT_SYSCALL_DEFINE5(msgrcv, int, msqid, compat_uptr_t, msgp,
291fdb0b	372	compat_ssize_t, msgsz, compat_long_t, msgtyp, int, msgflg)
48b25c43	373	{
291fdb0b	374	return do_msgrcv(msqid, compat_ptr(msgp), (ssize_t)msgsz, (long)msgtyp,
0e65a81b	375	msgflg, compat_do_msg_fill);
48b25c43	376	}
1da177e4	377
0e65a81b	378	COMPAT_SYSCALL_DEFINE3(shmat, int, shmid, compat_uptr_t, shmaddr, int, shmflg)
48b25c43 CM	379	{
	380	unsigned long ret;
	381	long err;
	382
079a96ae	383	err = do_shmat(shmid, compat_ptr(shmaddr), shmflg, &ret, COMPAT_SHMLBA);
48b25c43 CM	384	if (err)
	385	return err;
	386	force_successful_syscall_return();
	387	return (long)ret;
	388	}
1da177e4	389
5d70a596 HC	390	COMPAT_SYSCALL_DEFINE4(semtimedop, int, semid, struct sembuf __user *, tsems,
	391	unsigned, nsops,
	392	const struct compat_timespec __user *, timeout)
1da177e4	393	{
81993e81 PA	394	struct timespec __user *ts64;
	395	if (compat_convert_timespec(&ts64, timeout))
	396	return -EFAULT;
1da177e4 LT	397	return sys_semtimedop(semid, tsems, nsops, ts64);
1da177e4 LT	398	}