/*
   * 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_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 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);

  }

  
  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);
  }