1 files changed, 32 insertions, 708 deletions

diff --git a/ipc/compat.c b/ipc/compat.c
index 9b3c85f8a538..b17bf93d7b49 100644
--- a/ipc/compat.c
+++ b/ipc/compat.c
@@ -34,724 +34,48 @@
 
 #include "util.h"
 
-struct compat_msgbuf {
-	compat_long_t mtype;
-	char mtext[1];
-};
-
-struct compat_ipc_perm {
-	key_t key;
-	__compat_uid_t uid;
-	__compat_gid_t gid;
-	__compat_uid_t cuid;
-	__compat_gid_t cgid;
-	compat_mode_t mode;
-	unsigned short seq;
-};
-
-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_msqid_ds {
-	struct compat_ipc_perm msg_perm;
-	compat_uptr_t msg_first;
-	compat_uptr_t msg_last;
-	compat_time_t msg_stime;
-	compat_time_t msg_rtime;
-	compat_time_t msg_ctime;
-	compat_ulong_t msg_lcbytes;
-	compat_ulong_t msg_lqbytes;
-	unsigned short msg_cbytes;
-	unsigned short msg_qnum;
-	unsigned short msg_qbytes;
-	compat_ipc_pid_t msg_lspid;
-	compat_ipc_pid_t msg_lrpid;
-};
-
-struct compat_shmid_ds {
-	struct compat_ipc_perm shm_perm;
-	int shm_segsz;
-	compat_time_t shm_atime;
-	compat_time_t shm_dtime;
-	compat_time_t shm_ctime;
-	compat_ipc_pid_t shm_cpid;
-	compat_ipc_pid_t shm_lpid;
-	unsigned short shm_nattch;
-	unsigned short shm_unused;
-	compat_uptr_t shm_unused2;
-	compat_uptr_t shm_unused3;
-};
-
-struct compat_ipc_kludge {
-	compat_uptr_t msgp;
-	compat_long_t msgtyp;
-};
-
-struct compat_shminfo64 {
-	compat_ulong_t shmmax;
-	compat_ulong_t shmmin;
-	compat_ulong_t shmmni;
-	compat_ulong_t shmseg;
-	compat_ulong_t shmall;
-	compat_ulong_t __unused1;
-	compat_ulong_t __unused2;
-	compat_ulong_t __unused3;
-	compat_ulong_t __unused4;
-};
-
-struct compat_shm_info {
-	compat_int_t used_ids;
-	compat_ulong_t shm_tot, shm_rss, shm_swp;
-	compat_ulong_t swap_attempts, swap_successes;
-};
-
-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 get_compat_ipc64_perm(struct ipc64_perm *to,
+			  struct compat_ipc64_perm __user *from)
 {
-	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)))
+	struct compat_ipc64_perm v;
+	if (copy_from_user(&v, from, sizeof(v)))
 		return -EFAULT;
-	return __get_compat_ipc_perm(&s->sem_perm, &up->sem_perm);
+	to->uid = v.uid;
+	to->gid = v.gid;
+	to->mode = v.mode;
+	return 0;
 }
 
-static inline int put_compat_semid64_ds(struct semid64_ds *sem64,
-					struct compat_semid64_ds __user *up64)
+int get_compat_ipc_perm(struct ipc64_perm *to,
+			struct compat_ipc_perm __user *from)
 {
-	int err;
-
-	if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
+	struct compat_ipc_perm v;
+	if (copy_from_user(&v, from, sizeof(v)))
 		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;
+	to->uid = v.uid;
+	to->gid = v.gid;
+	to->mode = v.mode;
+	return 0;
 }
 
-static inline int put_compat_semid_ds(struct semid64_ds *s,
-				      struct compat_semid_ds __user *up)
+void to_compat_ipc64_perm(struct compat_ipc64_perm *to, struct ipc64_perm *from)
 {
-	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;
+	to->key = from->key;
+	to->uid = from->uid;
+	to->gid = from->gid;
+	to->cuid = from->cuid;
+	to->cgid = from->cgid;
+	to->mode = from->mode;
+	to->seq = from->seq;
 }
 
-static long do_compat_semctl(int first, int second, int third, u32 pad)
+void to_compat_ipc_perm(struct compat_ipc_perm *to, struct ipc64_perm *from)
 {
-	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);
-}
-
-static inline int get_compat_msqid64(struct msqid64_ds *m64,
-				     struct compat_msqid64_ds __user *up64)
-{
-	int err;
-
-	if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
-		return -EFAULT;
-	err  = __get_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
-	err |= __get_user(m64->msg_qbytes, &up64->msg_qbytes);
-	return err;
-}
-
-static inline int get_compat_msqid(struct msqid64_ds *m,
-				   struct compat_msqid_ds __user *up)
-{
-	int err;
-
-	if (!access_ok(VERIFY_READ, up, sizeof(*up)))
-		return -EFAULT;
-	err  = __get_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
-	err |= __get_user(m->msg_qbytes, &up->msg_qbytes);
-	return err;
-}
-
-static inline int put_compat_msqid64_ds(struct msqid64_ds *m64,
-				 struct compat_msqid64_ds __user *up64)
-{
-	int err;
-
-	if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
-		return -EFAULT;
-	err  = __put_compat_ipc64_perm(&m64->msg_perm, &up64->msg_perm);
-	err |= __put_user(m64->msg_stime, &up64->msg_stime);
-	err |= __put_user(m64->msg_rtime, &up64->msg_rtime);
-	err |= __put_user(m64->msg_ctime, &up64->msg_ctime);
-	err |= __put_user(m64->msg_cbytes, &up64->msg_cbytes);
-	err |= __put_user(m64->msg_qnum, &up64->msg_qnum);
-	err |= __put_user(m64->msg_qbytes, &up64->msg_qbytes);
-	err |= __put_user(m64->msg_lspid, &up64->msg_lspid);
-	err |= __put_user(m64->msg_lrpid, &up64->msg_lrpid);
-	return err;
-}
-
-static inline int put_compat_msqid_ds(struct msqid64_ds *m,
-				      struct compat_msqid_ds __user *up)
-{
-	int err;
-
-	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
-		return -EFAULT;
-	err  = __put_compat_ipc_perm(&m->msg_perm, &up->msg_perm);
-	err |= __put_user(m->msg_stime, &up->msg_stime);
-	err |= __put_user(m->msg_rtime, &up->msg_rtime);
-	err |= __put_user(m->msg_ctime, &up->msg_ctime);
-	err |= __put_user(m->msg_cbytes, &up->msg_cbytes);
-	err |= __put_user(m->msg_qnum, &up->msg_qnum);
-	err |= __put_user(m->msg_qbytes, &up->msg_qbytes);
-	err |= __put_user(m->msg_lspid, &up->msg_lspid);
-	err |= __put_user(m->msg_lrpid, &up->msg_lrpid);
-	return err;
-}
-
-COMPAT_SYSCALL_DEFINE3(msgctl, int, first, int, second, void __user *, uptr)
-{
-	int err, err2;
-	struct msqid64_ds m64;
-	int version = compat_ipc_parse_version(&second);
-	void __user *p;
-
-	memset(&m64, 0, sizeof(m64));
-
-	switch (second & (~IPC_64)) {
-	case IPC_INFO:
-	case IPC_RMID:
-	case MSG_INFO:
-		err = sys_msgctl(first, second, uptr);
-		break;
-
-	case IPC_SET:
-		if (version == IPC_64)
-			err = get_compat_msqid64(&m64, uptr);
-		else
-			err = get_compat_msqid(&m64, uptr);
-
-		if (err)
-			break;
-		p = compat_alloc_user_space(sizeof(m64));
-		if (copy_to_user(p, &m64, sizeof(m64)))
-			err = -EFAULT;
-		else
-			err = sys_msgctl(first, second, p);
-		break;
-
-	case IPC_STAT:
-	case MSG_STAT:
-		p = compat_alloc_user_space(sizeof(m64));
-		err = sys_msgctl(first, second, p);
-		if (err < 0)
-			break;
-		if (copy_from_user(&m64, p, sizeof(m64)))
-			err2 = -EFAULT;
-		else if (version == IPC_64)
-			err2 = put_compat_msqid64_ds(&m64, uptr);
-		else
-			err2 = put_compat_msqid_ds(&m64, uptr);
-		if (err2)
-			err = -EFAULT;
-		break;
-
-	default:
-		err = -EINVAL;
-		break;
-	}
-	return err;
-}
-
-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;
-}
-
-static inline int get_compat_shmid64_ds(struct shmid64_ds *sem64,
-					struct compat_shmid64_ds __user *up64)
-{
-	if (!access_ok(VERIFY_READ, up64, sizeof(*up64)))
-		return -EFAULT;
-	return __get_compat_ipc64_perm(&sem64->shm_perm, &up64->shm_perm);
-}
-
-static inline int get_compat_shmid_ds(struct shmid64_ds *s,
-				      struct compat_shmid_ds __user *up)
-{
-	if (!access_ok(VERIFY_READ, up, sizeof(*up)))
-		return -EFAULT;
-	return __get_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
-}
-
-static inline int put_compat_shmid64_ds(struct shmid64_ds *sem64,
-					struct compat_shmid64_ds __user *up64)
-{
-	int err;
-
-	if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
-		return -EFAULT;
-	err  = __put_compat_ipc64_perm(&sem64->shm_perm, &up64->shm_perm);
-	err |= __put_user(sem64->shm_atime, &up64->shm_atime);
-	err |= __put_user(sem64->shm_dtime, &up64->shm_dtime);
-	err |= __put_user(sem64->shm_ctime, &up64->shm_ctime);
-	err |= __put_user(sem64->shm_segsz, &up64->shm_segsz);
-	err |= __put_user(sem64->shm_nattch, &up64->shm_nattch);
-	err |= __put_user(sem64->shm_cpid, &up64->shm_cpid);
-	err |= __put_user(sem64->shm_lpid, &up64->shm_lpid);
-	return err;
-}
-
-static inline int put_compat_shmid_ds(struct shmid64_ds *s,
-				      struct compat_shmid_ds __user *up)
-{
-	int err;
-
-	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
-		return -EFAULT;
-	err  = __put_compat_ipc_perm(&s->shm_perm, &up->shm_perm);
-	err |= __put_user(s->shm_atime, &up->shm_atime);
-	err |= __put_user(s->shm_dtime, &up->shm_dtime);
-	err |= __put_user(s->shm_ctime, &up->shm_ctime);
-	err |= __put_user(s->shm_segsz, &up->shm_segsz);
-	err |= __put_user(s->shm_nattch, &up->shm_nattch);
-	err |= __put_user(s->shm_cpid, &up->shm_cpid);
-	err |= __put_user(s->shm_lpid, &up->shm_lpid);
-	return err;
-}
-
-static inline int put_compat_shminfo64(struct shminfo64 *smi,
-				       struct compat_shminfo64 __user *up64)
-{
-	int err;
-
-	if (!access_ok(VERIFY_WRITE, up64, sizeof(*up64)))
-		return -EFAULT;
-	if (smi->shmmax > INT_MAX)
-		smi->shmmax = INT_MAX;
-	err  = __put_user(smi->shmmax, &up64->shmmax);
-	err |= __put_user(smi->shmmin, &up64->shmmin);
-	err |= __put_user(smi->shmmni, &up64->shmmni);
-	err |= __put_user(smi->shmseg, &up64->shmseg);
-	err |= __put_user(smi->shmall, &up64->shmall);
-	return err;
-}
-
-static inline int put_compat_shminfo(struct shminfo64 *smi,
-				     struct shminfo __user *up)
-{
-	int err;
-
-	if (!access_ok(VERIFY_WRITE, up, sizeof(*up)))
-		return -EFAULT;
-	if (smi->shmmax > INT_MAX)
-		smi->shmmax = INT_MAX;
-	err  = __put_user(smi->shmmax, &up->shmmax);
-	err |= __put_user(smi->shmmin, &up->shmmin);
-	err |= __put_user(smi->shmmni, &up->shmmni);
-	err |= __put_user(smi->shmseg, &up->shmseg);
-	err |= __put_user(smi->shmall, &up->shmall);
-	return err;
-}
-
-static inline int put_compat_shm_info(struct shm_info __user *ip,
-				      struct compat_shm_info __user *uip)
-{
-	int err;
-	struct shm_info si;
-
-	if (!access_ok(VERIFY_WRITE, uip, sizeof(*uip)) ||
-	    copy_from_user(&si, ip, sizeof(si)))
-		return -EFAULT;
-	err  = __put_user(si.used_ids, &uip->used_ids);
-	err |= __put_user(si.shm_tot, &uip->shm_tot);
-	err |= __put_user(si.shm_rss, &uip->shm_rss);
-	err |= __put_user(si.shm_swp, &uip->shm_swp);
-	err |= __put_user(si.swap_attempts, &uip->swap_attempts);
-	err |= __put_user(si.swap_successes, &uip->swap_successes);
-	return err;
-}
-
-COMPAT_SYSCALL_DEFINE3(shmctl, int, first, int, second, void __user *, uptr)
-{
-	void __user *p;
-	struct shmid64_ds sem64;
-	struct shminfo64 smi;
-	int err, err2;
-	int version = compat_ipc_parse_version(&second);
-
-	memset(&sem64, 0, sizeof(sem64));
-
-	switch (second & (~IPC_64)) {
-	case IPC_RMID:
-	case SHM_LOCK:
-	case SHM_UNLOCK:
-		err = sys_shmctl(first, second, uptr);
-		break;
-
-	case IPC_INFO:
-		p = compat_alloc_user_space(sizeof(smi));
-		err = sys_shmctl(first, second, p);
-		if (err < 0)
-			break;
-		if (copy_from_user(&smi, p, sizeof(smi)))
-			err2 = -EFAULT;
-		else if (version == IPC_64)
-			err2 = put_compat_shminfo64(&smi, uptr);
-		else
-			err2 = put_compat_shminfo(&smi, uptr);
-		if (err2)
-			err = -EFAULT;
-		break;
-
-
-	case IPC_SET:
-		if (version == IPC_64)
-			err = get_compat_shmid64_ds(&sem64, uptr);
-		else
-			err = get_compat_shmid_ds(&sem64, uptr);
-
-		if (err)
-			break;
-		p = compat_alloc_user_space(sizeof(sem64));
-		if (copy_to_user(p, &sem64, sizeof(sem64)))
-			err = -EFAULT;
-		else
-			err = sys_shmctl(first, second, p);
-		break;
-
-	case IPC_STAT:
-	case SHM_STAT:
-		p = compat_alloc_user_space(sizeof(sem64));
-		err = sys_shmctl(first, second, p);
-		if (err < 0)
-			break;
-		if (copy_from_user(&sem64, p, sizeof(sem64)))
-			err2 = -EFAULT;
-		else if (version == IPC_64)
-			err2 = put_compat_shmid64_ds(&sem64, uptr);
-		else
-			err2 = put_compat_shmid_ds(&sem64, uptr);
-		if (err2)
-			err = -EFAULT;
-		break;
-
-	case SHM_INFO:
-		p = compat_alloc_user_space(sizeof(struct shm_info));
-		err = sys_shmctl(first, second, p);
-		if (err < 0)
-			break;
-		err2 = put_compat_shm_info(p, uptr);
-		if (err2)
-			err = -EFAULT;
-		break;
-
-	default:
-		err = -EINVAL;
-		break;
-	}
-	return err;
-}
-
-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);
+	to->key = from->key;
+	SET_UID(to->uid, from->uid);
+	SET_GID(to->gid, from->gid);
+	SET_UID(to->cuid, from->cuid);
+	SET_GID(to->cgid, from->cgid);
+	to->mode = from->mode;
+	to->seq = from->seq;
 }