initial_commit

1 files changed, 2061 insertions, 0 deletions

diff --git a/fs/compat.c b/fs/compat.c
new file mode 100644
index 00000000..0ea00832
--- /dev/null
+++ b/fs/compat.c
@@ -0,0 +1,2061 @@
+/*
+ *  linux/fs/compat.c
+ *
+ *  Kernel compatibililty routines for e.g. 32 bit syscall support
+ *  on 64 bit kernels.
+ *
+ *  Copyright (C) 2002       Stephen Rothwell, IBM Corporation
+ *  Copyright (C) 1997-2000  Jakub Jelinek  (jakub@redhat.com)
+ *  Copyright (C) 1998       Eddie C. Dost  (ecd@skynet.be)
+ *  Copyright (C) 2001,2002  Andi Kleen, SuSE Labs 
+ *  Copyright (C) 2003       Pavel Machek (pavel@ucw.cz)
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ */
+
+#include <linux/stddef.h>
+#include <linux/kernel.h>
+#include <linux/linkage.h>
+#include <linux/compat.h>
+#include <linux/errno.h>
+#include <linux/time.h>
+#include <linux/fs.h>
+#include <linux/fcntl.h>
+#include <linux/namei.h>
+#include <linux/file.h>
+#include <linux/fdtable.h>
+#include <linux/vfs.h>
+#include <linux/ioctl.h>
+#include <linux/init.h>
+#include <linux/ncp_mount.h>
+#include <linux/nfs4_mount.h>
+#include <linux/syscalls.h>
+#include <linux/ctype.h>
+#include <linux/module.h>
+#include <linux/dirent.h>
+#include <linux/fsnotify.h>
+#include <linux/highuid.h>
+#include <linux/nfsd/syscall.h>
+#include <linux/personality.h>
+#include <linux/rwsem.h>
+#include <linux/tsacct_kern.h>
+#include <linux/security.h>
+#include <linux/highmem.h>
+#include <linux/signal.h>
+#include <linux/poll.h>
+#include <linux/mm.h>
+#include <linux/eventpoll.h>
+#include <linux/fs_struct.h>
+#include <linux/slab.h>
+#include <linux/pagemap.h>
+
+#include <asm/uaccess.h>
+#include <asm/mmu_context.h>
+#include <asm/ioctls.h>
+#include "internal.h"
+
+int compat_log = 1;
+
+int compat_printk(const char *fmt, ...)
+{
+	va_list ap;
+	int ret;
+	if (!compat_log)
+		return 0;
+	va_start(ap, fmt);
+	ret = vprintk(fmt, ap);
+	va_end(ap);
+	return ret;
+}
+
+#include "read_write.h"
+
+/*
+ * Not all architectures have sys_utime, so implement this in terms
+ * of sys_utimes.
+ */
+asmlinkage long compat_sys_utime(const char __user *filename,
+				 struct compat_utimbuf __user *t)
+{
+	struct timespec tv[2];
+
+	if (t) {
+		if (get_user(tv[0].tv_sec, &t->actime) ||
+		    get_user(tv[1].tv_sec, &t->modtime))
+			return -EFAULT;
+		tv[0].tv_nsec = 0;
+		tv[1].tv_nsec = 0;
+	}
+	return do_utimes(AT_FDCWD, filename, t ? tv : NULL, 0);
+}
+
+asmlinkage long compat_sys_utimensat(unsigned int dfd, const char __user *filename, struct compat_timespec __user *t, int flags)
+{
+	struct timespec tv[2];
+
+	if  (t) {
+		if (get_compat_timespec(&tv[0], &t[0]) ||
+		    get_compat_timespec(&tv[1], &t[1]))
+			return -EFAULT;
+
+		if (tv[0].tv_nsec == UTIME_OMIT && tv[1].tv_nsec == UTIME_OMIT)
+			return 0;
+	}
+	return do_utimes(dfd, filename, t ? tv : NULL, flags);
+}
+
+asmlinkage long compat_sys_futimesat(unsigned int dfd, const char __user *filename, struct compat_timeval __user *t)
+{
+	struct timespec tv[2];
+
+	if (t) {
+		if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
+		    get_user(tv[0].tv_nsec, &t[0].tv_usec) ||
+		    get_user(tv[1].tv_sec, &t[1].tv_sec) ||
+		    get_user(tv[1].tv_nsec, &t[1].tv_usec))
+			return -EFAULT;
+		if (tv[0].tv_nsec >= 1000000 || tv[0].tv_nsec < 0 ||
+		    tv[1].tv_nsec >= 1000000 || tv[1].tv_nsec < 0)
+			return -EINVAL;
+		tv[0].tv_nsec *= 1000;
+		tv[1].tv_nsec *= 1000;
+	}
+	return do_utimes(dfd, filename, t ? tv : NULL, 0);
+}
+
+asmlinkage long compat_sys_utimes(const char __user *filename, struct compat_timeval __user *t)
+{
+	return compat_sys_futimesat(AT_FDCWD, filename, t);
+}
+
+static int cp_compat_stat(struct kstat *stat, struct compat_stat __user *ubuf)
+{
+	compat_ino_t ino = stat->ino;
+	typeof(ubuf->st_uid) uid = 0;
+	typeof(ubuf->st_gid) gid = 0;
+	int err;
+
+	SET_UID(uid, stat->uid);
+	SET_GID(gid, stat->gid);
+
+	if ((u64) stat->size > MAX_NON_LFS ||
+	    !old_valid_dev(stat->dev) ||
+	    !old_valid_dev(stat->rdev))
+		return -EOVERFLOW;
+	if (sizeof(ino) < sizeof(stat->ino) && ino != stat->ino)
+		return -EOVERFLOW;
+
+	if (clear_user(ubuf, sizeof(*ubuf)))
+		return -EFAULT;
+
+	err  = __put_user(old_encode_dev(stat->dev), &ubuf->st_dev);
+	err |= __put_user(ino, &ubuf->st_ino);
+	err |= __put_user(stat->mode, &ubuf->st_mode);
+	err |= __put_user(stat->nlink, &ubuf->st_nlink);
+	err |= __put_user(uid, &ubuf->st_uid);
+	err |= __put_user(gid, &ubuf->st_gid);
+	err |= __put_user(old_encode_dev(stat->rdev), &ubuf->st_rdev);
+	err |= __put_user(stat->size, &ubuf->st_size);
+	err |= __put_user(stat->atime.tv_sec, &ubuf->st_atime);
+	err |= __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec);
+	err |= __put_user(stat->mtime.tv_sec, &ubuf->st_mtime);
+	err |= __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec);
+	err |= __put_user(stat->ctime.tv_sec, &ubuf->st_ctime);
+	err |= __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec);
+	err |= __put_user(stat->blksize, &ubuf->st_blksize);
+	err |= __put_user(stat->blocks, &ubuf->st_blocks);
+	return err;
+}
+
+asmlinkage long compat_sys_newstat(const char __user * filename,
+		struct compat_stat __user *statbuf)
+{
+	struct kstat stat;
+	int error;
+
+	error = vfs_stat(filename, &stat);
+	if (error)
+		return error;
+	return cp_compat_stat(&stat, statbuf);
+}
+
+asmlinkage long compat_sys_newlstat(const char __user * filename,
+		struct compat_stat __user *statbuf)
+{
+	struct kstat stat;
+	int error;
+
+	error = vfs_lstat(filename, &stat);
+	if (error)
+		return error;
+	return cp_compat_stat(&stat, statbuf);
+}
+
+#ifndef __ARCH_WANT_STAT64
+asmlinkage long compat_sys_newfstatat(unsigned int dfd,
+		const char __user *filename,
+		struct compat_stat __user *statbuf, int flag)
+{
+	struct kstat stat;
+	int error;
+
+	error = vfs_fstatat(dfd, filename, &stat, flag);
+	if (error)
+		return error;
+	return cp_compat_stat(&stat, statbuf);
+}
+#endif
+
+asmlinkage long compat_sys_newfstat(unsigned int fd,
+		struct compat_stat __user * statbuf)
+{
+	struct kstat stat;
+	int error = vfs_fstat(fd, &stat);
+
+	if (!error)
+		error = cp_compat_stat(&stat, statbuf);
+	return error;
+}
+
+static int put_compat_statfs(struct compat_statfs __user *ubuf, struct kstatfs *kbuf)
+{
+	
+	if (sizeof ubuf->f_blocks == 4) {
+		if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
+		     kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
+			return -EOVERFLOW;
+		/* f_files and f_ffree may be -1; it's okay
+		 * to stuff that into 32 bits */
+		if (kbuf->f_files != 0xffffffffffffffffULL
+		 && (kbuf->f_files & 0xffffffff00000000ULL))
+			return -EOVERFLOW;
+		if (kbuf->f_ffree != 0xffffffffffffffffULL
+		 && (kbuf->f_ffree & 0xffffffff00000000ULL))
+			return -EOVERFLOW;
+	}
+	if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
+	    __put_user(kbuf->f_type, &ubuf->f_type) ||
+	    __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
+	    __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
+	    __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
+	    __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
+	    __put_user(kbuf->f_files, &ubuf->f_files) ||
+	    __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
+	    __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
+	    __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
+	    __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
+	    __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
+	    __put_user(0, &ubuf->f_spare[0]) || 
+	    __put_user(0, &ubuf->f_spare[1]) || 
+	    __put_user(0, &ubuf->f_spare[2]) || 
+	    __put_user(0, &ubuf->f_spare[3]) || 
+	    __put_user(0, &ubuf->f_spare[4]))
+		return -EFAULT;
+	return 0;
+}
+
+/*
+ * The following statfs calls are copies of code from fs/statfs.c and
+ * should be checked against those from time to time
+ */
+asmlinkage long compat_sys_statfs(const char __user *pathname, struct compat_statfs __user *buf)
+{
+	struct kstatfs tmp;
+	int error = user_statfs(pathname, &tmp);
+	if (!error)
+		error = put_compat_statfs(buf, &tmp);
+	return error;
+}
+
+asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
+{
+	struct kstatfs tmp;
+	int error = fd_statfs(fd, &tmp);
+	if (!error)
+		error = put_compat_statfs(buf, &tmp);
+	return error;
+}
+
+static int put_compat_statfs64(struct compat_statfs64 __user *ubuf, struct kstatfs *kbuf)
+{
+	if (sizeof ubuf->f_blocks == 4) {
+		if ((kbuf->f_blocks | kbuf->f_bfree | kbuf->f_bavail |
+		     kbuf->f_bsize | kbuf->f_frsize) & 0xffffffff00000000ULL)
+			return -EOVERFLOW;
+		/* f_files and f_ffree may be -1; it's okay
+		 * to stuff that into 32 bits */
+		if (kbuf->f_files != 0xffffffffffffffffULL
+		 && (kbuf->f_files & 0xffffffff00000000ULL))
+			return -EOVERFLOW;
+		if (kbuf->f_ffree != 0xffffffffffffffffULL
+		 && (kbuf->f_ffree & 0xffffffff00000000ULL))
+			return -EOVERFLOW;
+	}
+	if (!access_ok(VERIFY_WRITE, ubuf, sizeof(*ubuf)) ||
+	    __put_user(kbuf->f_type, &ubuf->f_type) ||
+	    __put_user(kbuf->f_bsize, &ubuf->f_bsize) ||
+	    __put_user(kbuf->f_blocks, &ubuf->f_blocks) ||
+	    __put_user(kbuf->f_bfree, &ubuf->f_bfree) ||
+	    __put_user(kbuf->f_bavail, &ubuf->f_bavail) ||
+	    __put_user(kbuf->f_files, &ubuf->f_files) ||
+	    __put_user(kbuf->f_ffree, &ubuf->f_ffree) ||
+	    __put_user(kbuf->f_namelen, &ubuf->f_namelen) ||
+	    __put_user(kbuf->f_fsid.val[0], &ubuf->f_fsid.val[0]) ||
+	    __put_user(kbuf->f_fsid.val[1], &ubuf->f_fsid.val[1]) ||
+	    __put_user(kbuf->f_frsize, &ubuf->f_frsize) ||
+	    __put_user(kbuf->f_flags, &ubuf->f_flags) ||
+	    __clear_user(ubuf->f_spare, sizeof(ubuf->f_spare)))
+		return -EFAULT;
+	return 0;
+}
+
+asmlinkage long compat_sys_statfs64(const char __user *pathname, compat_size_t sz, struct compat_statfs64 __user *buf)
+{
+	struct kstatfs tmp;
+	int error;
+
+	if (sz != sizeof(*buf))
+		return -EINVAL;
+
+	error = user_statfs(pathname, &tmp);
+	if (!error)
+		error = put_compat_statfs64(buf, &tmp);
+	return error;
+}
+
+asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
+{
+	struct kstatfs tmp;
+	int error;
+
+	if (sz != sizeof(*buf))
+		return -EINVAL;
+
+	error = fd_statfs(fd, &tmp);
+	if (!error)
+		error = put_compat_statfs64(buf, &tmp);
+	return error;
+}
+
+/*
+ * This is a copy of sys_ustat, just dealing with a structure layout.
+ * Given how simple this syscall is that apporach is more maintainable
+ * than the various conversion hacks.
+ */
+asmlinkage long compat_sys_ustat(unsigned dev, struct compat_ustat __user *u)
+{
+	struct super_block *sb;
+	struct compat_ustat tmp;
+	struct kstatfs sbuf;
+	int err;
+
+	sb = user_get_super(new_decode_dev(dev));
+	if (!sb)
+		return -EINVAL;
+	err = statfs_by_dentry(sb->s_root, &sbuf);
+	drop_super(sb);
+	if (err)
+		return err;
+
+	memset(&tmp, 0, sizeof(struct compat_ustat));
+	tmp.f_tfree = sbuf.f_bfree;
+	tmp.f_tinode = sbuf.f_ffree;
+	if (copy_to_user(u, &tmp, sizeof(struct compat_ustat)))
+		return -EFAULT;
+	return 0;
+}
+
+static int get_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
+{
+	if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
+	    __get_user(kfl->l_type, &ufl->l_type) ||
+	    __get_user(kfl->l_whence, &ufl->l_whence) ||
+	    __get_user(kfl->l_start, &ufl->l_start) ||
+	    __get_user(kfl->l_len, &ufl->l_len) ||
+	    __get_user(kfl->l_pid, &ufl->l_pid))
+		return -EFAULT;
+	return 0;
+}
+
+static int put_compat_flock(struct flock *kfl, struct compat_flock __user *ufl)
+{
+	if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
+	    __put_user(kfl->l_type, &ufl->l_type) ||
+	    __put_user(kfl->l_whence, &ufl->l_whence) ||
+	    __put_user(kfl->l_start, &ufl->l_start) ||
+	    __put_user(kfl->l_len, &ufl->l_len) ||
+	    __put_user(kfl->l_pid, &ufl->l_pid))
+		return -EFAULT;
+	return 0;
+}
+
+#ifndef HAVE_ARCH_GET_COMPAT_FLOCK64
+static int get_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
+{
+	if (!access_ok(VERIFY_READ, ufl, sizeof(*ufl)) ||
+	    __get_user(kfl->l_type, &ufl->l_type) ||
+	    __get_user(kfl->l_whence, &ufl->l_whence) ||
+	    __get_user(kfl->l_start, &ufl->l_start) ||
+	    __get_user(kfl->l_len, &ufl->l_len) ||
+	    __get_user(kfl->l_pid, &ufl->l_pid))
+		return -EFAULT;
+	return 0;
+}
+#endif
+
+#ifndef HAVE_ARCH_PUT_COMPAT_FLOCK64
+static int put_compat_flock64(struct flock *kfl, struct compat_flock64 __user *ufl)
+{
+	if (!access_ok(VERIFY_WRITE, ufl, sizeof(*ufl)) ||
+	    __put_user(kfl->l_type, &ufl->l_type) ||
+	    __put_user(kfl->l_whence, &ufl->l_whence) ||
+	    __put_user(kfl->l_start, &ufl->l_start) ||
+	    __put_user(kfl->l_len, &ufl->l_len) ||
+	    __put_user(kfl->l_pid, &ufl->l_pid))
+		return -EFAULT;
+	return 0;
+}
+#endif
+
+asmlinkage long compat_sys_fcntl64(unsigned int fd, unsigned int cmd,
+		unsigned long arg)
+{
+	mm_segment_t old_fs;
+	struct flock f;
+	long ret;
+
+	switch (cmd) {
+	case F_GETLK:
+	case F_SETLK:
+	case F_SETLKW:
+		ret = get_compat_flock(&f, compat_ptr(arg));
+		if (ret != 0)
+			break;
+		old_fs = get_fs();
+		set_fs(KERNEL_DS);
+		ret = sys_fcntl(fd, cmd, (unsigned long)&f);
+		set_fs(old_fs);
+		if (cmd == F_GETLK && ret == 0) {
+			/* GETLK was successful and we need to return the data...
+			 * but it needs to fit in the compat structure.
+			 * l_start shouldn't be too big, unless the original
+			 * start + end is greater than COMPAT_OFF_T_MAX, in which
+			 * case the app was asking for trouble, so we return
+			 * -EOVERFLOW in that case.
+			 * l_len could be too big, in which case we just truncate it,
+			 * and only allow the app to see that part of the conflicting
+			 * lock that might make sense to it anyway
+			 */
+
+			if (f.l_start > COMPAT_OFF_T_MAX)
+				ret = -EOVERFLOW;
+			if (f.l_len > COMPAT_OFF_T_MAX)
+				f.l_len = COMPAT_OFF_T_MAX;
+			if (ret == 0)
+				ret = put_compat_flock(&f, compat_ptr(arg));
+		}
+		break;
+
+	case F_GETLK64:
+	case F_SETLK64:
+	case F_SETLKW64:
+		ret = get_compat_flock64(&f, compat_ptr(arg));
+		if (ret != 0)
+			break;
+		old_fs = get_fs();
+		set_fs(KERNEL_DS);
+		ret = sys_fcntl(fd, (cmd == F_GETLK64) ? F_GETLK :
+				((cmd == F_SETLK64) ? F_SETLK : F_SETLKW),
+				(unsigned long)&f);
+		set_fs(old_fs);
+		if (cmd == F_GETLK64 && ret == 0) {
+			/* need to return lock information - see above for commentary */
+			if (f.l_start > COMPAT_LOFF_T_MAX)
+				ret = -EOVERFLOW;
+			if (f.l_len > COMPAT_LOFF_T_MAX)
+				f.l_len = COMPAT_LOFF_T_MAX;
+			if (ret == 0)
+				ret = put_compat_flock64(&f, compat_ptr(arg));
+		}
+		break;
+
+	default:
+		ret = sys_fcntl(fd, cmd, arg);
+		break;
+	}
+	return ret;
+}
+
+asmlinkage long compat_sys_fcntl(unsigned int fd, unsigned int cmd,
+		unsigned long arg)
+{
+	if ((cmd == F_GETLK64) || (cmd == F_SETLK64) || (cmd == F_SETLKW64))
+		return -EINVAL;
+	return compat_sys_fcntl64(fd, cmd, arg);
+}
+
+asmlinkage long
+compat_sys_io_setup(unsigned nr_reqs, u32 __user *ctx32p)
+{
+	long ret;
+	aio_context_t ctx64;
+
+	mm_segment_t oldfs = get_fs();
+	if (unlikely(get_user(ctx64, ctx32p)))
+		return -EFAULT;
+
+	set_fs(KERNEL_DS);
+	/* The __user pointer cast is valid because of the set_fs() */
+	ret = sys_io_setup(nr_reqs, (aio_context_t __user *) &ctx64);
+	set_fs(oldfs);
+	/* truncating is ok because it's a user address */
+	if (!ret)
+		ret = put_user((u32) ctx64, ctx32p);
+	return ret;
+}
+
+asmlinkage long
+compat_sys_io_getevents(aio_context_t ctx_id,
+				 unsigned long min_nr,
+				 unsigned long nr,
+				 struct io_event __user *events,
+				 struct compat_timespec __user *timeout)
+{
+	long ret;
+	struct timespec t;
+	struct timespec __user *ut = NULL;
+
+	ret = -EFAULT;
+	if (unlikely(!access_ok(VERIFY_WRITE, events, 
+				nr * sizeof(struct io_event))))
+		goto out;
+	if (timeout) {
+		if (get_compat_timespec(&t, timeout))
+			goto out;
+
+		ut = compat_alloc_user_space(sizeof(*ut));
+		if (copy_to_user(ut, &t, sizeof(t)) )
+			goto out;
+	} 
+	ret = sys_io_getevents(ctx_id, min_nr, nr, events, ut);
+out:
+	return ret;
+}
+
+/* A write operation does a read from user space and vice versa */
+#define vrfy_dir(type) ((type) == READ ? VERIFY_WRITE : VERIFY_READ)
+
+ssize_t compat_rw_copy_check_uvector(int type,
+		const struct compat_iovec __user *uvector, unsigned long nr_segs,
+		unsigned long fast_segs, struct iovec *fast_pointer,
+		struct iovec **ret_pointer)
+{
+	compat_ssize_t tot_len;
+	struct iovec *iov = *ret_pointer = fast_pointer;
+	ssize_t ret = 0;
+	int seg;
+
+	/*
+	 * SuS says "The readv() function *may* fail if the iovcnt argument
+	 * was less than or equal to 0, or greater than {IOV_MAX}.  Linux has
+	 * traditionally returned zero for zero segments, so...
+	 */
+	if (nr_segs == 0)
+		goto out;
+
+	ret = -EINVAL;
+	if (nr_segs > UIO_MAXIOV || nr_segs < 0)
+		goto out;
+	if (nr_segs > fast_segs) {
+		ret = -ENOMEM;
+		iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
+		if (iov == NULL)
+			goto out;
+	}
+	*ret_pointer = iov;
+
+	/*
+	 * Single unix specification:
+	 * We should -EINVAL if an element length is not >= 0 and fitting an
+	 * ssize_t.
+	 *
+	 * In Linux, the total length is limited to MAX_RW_COUNT, there is
+	 * no overflow possibility.
+	 */
+	tot_len = 0;
+	ret = -EINVAL;
+	for (seg = 0; seg < nr_segs; seg++) {
+		compat_uptr_t buf;
+		compat_ssize_t len;
+
+		if (__get_user(len, &uvector->iov_len) ||
+		   __get_user(buf, &uvector->iov_base)) {
+			ret = -EFAULT;
+			goto out;
+		}
+		if (len < 0)	/* size_t not fitting in compat_ssize_t .. */
+			goto out;
+		if (!access_ok(vrfy_dir(type), compat_ptr(buf), len)) {
+			ret = -EFAULT;
+			goto out;
+		}
+		if (len > MAX_RW_COUNT - tot_len)
+			len = MAX_RW_COUNT - tot_len;
+		tot_len += len;
+		iov->iov_base = compat_ptr(buf);
+		iov->iov_len = (compat_size_t) len;
+		uvector++;
+		iov++;
+	}
+	ret = tot_len;
+
+out:
+	return ret;
+}
+
+static inline long
+copy_iocb(long nr, u32 __user *ptr32, struct iocb __user * __user *ptr64)
+{
+	compat_uptr_t uptr;
+	int i;
+
+	for (i = 0; i < nr; ++i) {
+		if (get_user(uptr, ptr32 + i))
+			return -EFAULT;
+		if (put_user(compat_ptr(uptr), ptr64 + i))
+			return -EFAULT;
+	}
+	return 0;
+}
+
+#define MAX_AIO_SUBMITS 	(PAGE_SIZE/sizeof(struct iocb *))
+
+asmlinkage long
+compat_sys_io_submit(aio_context_t ctx_id, int nr, u32 __user *iocb)
+{
+	struct iocb __user * __user *iocb64; 
+	long ret;
+
+	if (unlikely(nr < 0))
+		return -EINVAL;
+
+	if (nr > MAX_AIO_SUBMITS)
+		nr = MAX_AIO_SUBMITS;
+	
+	iocb64 = compat_alloc_user_space(nr * sizeof(*iocb64));
+	ret = copy_iocb(nr, iocb, iocb64);
+	if (!ret)
+		ret = do_io_submit(ctx_id, nr, iocb64, 1);
+	return ret;
+}
+
+struct compat_ncp_mount_data {
+	compat_int_t version;
+	compat_uint_t ncp_fd;
+	__compat_uid_t mounted_uid;
+	compat_pid_t wdog_pid;
+	unsigned char mounted_vol[NCP_VOLNAME_LEN + 1];
+	compat_uint_t time_out;
+	compat_uint_t retry_count;
+	compat_uint_t flags;
+	__compat_uid_t uid;
+	__compat_gid_t gid;
+	compat_mode_t file_mode;
+	compat_mode_t dir_mode;
+};
+
+struct compat_ncp_mount_data_v4 {
+	compat_int_t version;
+	compat_ulong_t flags;
+	compat_ulong_t mounted_uid;
+	compat_long_t wdog_pid;
+	compat_uint_t ncp_fd;
+	compat_uint_t time_out;
+	compat_uint_t retry_count;
+	compat_ulong_t uid;
+	compat_ulong_t gid;
+	compat_ulong_t file_mode;
+	compat_ulong_t dir_mode;
+};
+
+static void *do_ncp_super_data_conv(void *raw_data)
+{
+	int version = *(unsigned int *)raw_data;
+
+	if (version == 3) {
+		struct compat_ncp_mount_data *c_n = raw_data;
+		struct ncp_mount_data *n = raw_data;
+
+		n->dir_mode = c_n->dir_mode;
+		n->file_mode = c_n->file_mode;
+		n->gid = c_n->gid;
+		n->uid = c_n->uid;
+		memmove (n->mounted_vol, c_n->mounted_vol, (sizeof (c_n->mounted_vol) + 3 * sizeof (unsigned int)));
+		n->wdog_pid = c_n->wdog_pid;
+		n->mounted_uid = c_n->mounted_uid;
+	} else if (version == 4) {
+		struct compat_ncp_mount_data_v4 *c_n = raw_data;
+		struct ncp_mount_data_v4 *n = raw_data;
+
+		n->dir_mode = c_n->dir_mode;
+		n->file_mode = c_n->file_mode;
+		n->gid = c_n->gid;
+		n->uid = c_n->uid;
+		n->retry_count = c_n->retry_count;
+		n->time_out = c_n->time_out;
+		n->ncp_fd = c_n->ncp_fd;
+		n->wdog_pid = c_n->wdog_pid;
+		n->mounted_uid = c_n->mounted_uid;
+		n->flags = c_n->flags;
+	} else if (version != 5) {
+		return NULL;
+	}
+
+	return raw_data;
+}
+
+
+struct compat_nfs_string {
+	compat_uint_t len;
+	compat_uptr_t data;
+};
+
+static inline void compat_nfs_string(struct nfs_string *dst,
+				     struct compat_nfs_string *src)
+{
+	dst->data = compat_ptr(src->data);
+	dst->len = src->len;
+}
+
+struct compat_nfs4_mount_data_v1 {
+	compat_int_t version;
+	compat_int_t flags;
+	compat_int_t rsize;
+	compat_int_t wsize;
+	compat_int_t timeo;
+	compat_int_t retrans;
+	compat_int_t acregmin;
+	compat_int_t acregmax;
+	compat_int_t acdirmin;
+	compat_int_t acdirmax;
+	struct compat_nfs_string client_addr;
+	struct compat_nfs_string mnt_path;
+	struct compat_nfs_string hostname;
+	compat_uint_t host_addrlen;
+	compat_uptr_t host_addr;
+	compat_int_t proto;
+	compat_int_t auth_flavourlen;
+	compat_uptr_t auth_flavours;
+};
+
+static int do_nfs4_super_data_conv(void *raw_data)
+{
+	int version = *(compat_uint_t *) raw_data;
+
+	if (version == 1) {
+		struct compat_nfs4_mount_data_v1 *raw = raw_data;
+		struct nfs4_mount_data *real = raw_data;
+
+		/* copy the fields backwards */
+		real->auth_flavours = compat_ptr(raw->auth_flavours);
+		real->auth_flavourlen = raw->auth_flavourlen;
+		real->proto = raw->proto;
+		real->host_addr = compat_ptr(raw->host_addr);
+		real->host_addrlen = raw->host_addrlen;
+		compat_nfs_string(&real->hostname, &raw->hostname);
+		compat_nfs_string(&real->mnt_path, &raw->mnt_path);
+		compat_nfs_string(&real->client_addr, &raw->client_addr);
+		real->acdirmax = raw->acdirmax;
+		real->acdirmin = raw->acdirmin;
+		real->acregmax = raw->acregmax;
+		real->acregmin = raw->acregmin;
+		real->retrans = raw->retrans;
+		real->timeo = raw->timeo;
+		real->wsize = raw->wsize;
+		real->rsize = raw->rsize;
+		real->flags = raw->flags;
+		real->version = raw->version;
+	}
+
+	return 0;
+}
+
+#define NCPFS_NAME      "ncpfs"
+#define NFS4_NAME	"nfs4"
+
+asmlinkage long compat_sys_mount(const char __user * dev_name,
+				 const char __user * dir_name,
+				 const char __user * type, unsigned long flags,
+				 const void __user * data)
+{
+	char *kernel_type;
+	unsigned long data_page;
+	char *kernel_dev;
+	char *dir_page;
+	int retval;
+
+	retval = copy_mount_string(type, &kernel_type);
+	if (retval < 0)
+		goto out;
+
+	dir_page = getname(dir_name);
+	retval = PTR_ERR(dir_page);
+	if (IS_ERR(dir_page))
+		goto out1;
+
+	retval = copy_mount_string(dev_name, &kernel_dev);
+	if (retval < 0)
+		goto out2;
+
+	retval = copy_mount_options(data, &data_page);
+	if (retval < 0)
+		goto out3;
+
+	retval = -EINVAL;
+
+	if (kernel_type && data_page) {
+		if (!strcmp(kernel_type, NCPFS_NAME)) {
+			do_ncp_super_data_conv((void *)data_page);
+		} else if (!strcmp(kernel_type, NFS4_NAME)) {
+			if (do_nfs4_super_data_conv((void *) data_page))
+				goto out4;
+		}
+	}
+
+	retval = do_mount(kernel_dev, dir_page, kernel_type,
+			flags, (void*)data_page);
+
+ out4:
+	free_page(data_page);
+ out3:
+	kfree(kernel_dev);
+ out2:
+	putname(dir_page);
+ out1:
+	kfree(kernel_type);
+ out:
+	return retval;
+}
+
+struct compat_old_linux_dirent {
+	compat_ulong_t	d_ino;
+	compat_ulong_t	d_offset;
+	unsigned short	d_namlen;
+	char		d_name[1];
+};
+
+struct compat_readdir_callback {
+	struct compat_old_linux_dirent __user *dirent;
+	int result;
+};
+
+static int compat_fillonedir(void *__buf, const char *name, int namlen,
+			loff_t offset, u64 ino, unsigned int d_type)
+{
+	struct compat_readdir_callback *buf = __buf;
+	struct compat_old_linux_dirent __user *dirent;
+	compat_ulong_t d_ino;
+
+	if (buf->result)
+		return -EINVAL;
+	d_ino = ino;
+	if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
+		buf->result = -EOVERFLOW;
+		return -EOVERFLOW;
+	}
+	buf->result++;
+	dirent = buf->dirent;
+	if (!access_ok(VERIFY_WRITE, dirent,
+			(unsigned long)(dirent->d_name + namlen + 1) -
+				(unsigned long)dirent))
+		goto efault;
+	if (	__put_user(d_ino, &dirent->d_ino) ||
+		__put_user(offset, &dirent->d_offset) ||
+		__put_user(namlen, &dirent->d_namlen) ||
+		__copy_to_user(dirent->d_name, name, namlen) ||
+		__put_user(0, dirent->d_name + namlen))
+		goto efault;
+	return 0;
+efault:
+	buf->result = -EFAULT;
+	return -EFAULT;
+}
+
+asmlinkage long compat_sys_old_readdir(unsigned int fd,
+	struct compat_old_linux_dirent __user *dirent, unsigned int count)
+{
+	int error;
+	struct file *file;
+	struct compat_readdir_callback buf;
+
+	error = -EBADF;
+	file = fget(fd);
+	if (!file)
+		goto out;
+
+	buf.result = 0;
+	buf.dirent = dirent;
+
+	error = vfs_readdir(file, compat_fillonedir, &buf);
+	if (buf.result)
+		error = buf.result;
+
+	fput(file);
+out:
+	return error;
+}
+
+struct compat_linux_dirent {
+	compat_ulong_t	d_ino;
+	compat_ulong_t	d_off;
+	unsigned short	d_reclen;
+	char		d_name[1];
+};
+
+struct compat_getdents_callback {
+	struct compat_linux_dirent __user *current_dir;
+	struct compat_linux_dirent __user *previous;
+	int count;
+	int error;
+};
+
+static int compat_filldir(void *__buf, const char *name, int namlen,
+		loff_t offset, u64 ino, unsigned int d_type)
+{
+	struct compat_linux_dirent __user * dirent;
+	struct compat_getdents_callback *buf = __buf;
+	compat_ulong_t d_ino;
+	int reclen = ALIGN(offsetof(struct compat_linux_dirent, d_name) +
+		namlen + 2, sizeof(compat_long_t));
+
+	buf->error = -EINVAL;	/* only used if we fail.. */
+	if (reclen > buf->count)
+		return -EINVAL;
+	d_ino = ino;
+	if (sizeof(d_ino) < sizeof(ino) && d_ino != ino) {
+		buf->error = -EOVERFLOW;
+		return -EOVERFLOW;
+	}
+	dirent = buf->previous;
+	if (dirent) {
+		if (__put_user(offset, &dirent->d_off))
+			goto efault;
+	}
+	dirent = buf->current_dir;
+	if (__put_user(d_ino, &dirent->d_ino))
+		goto efault;
+	if (__put_user(reclen, &dirent->d_reclen))
+		goto efault;
+	if (copy_to_user(dirent->d_name, name, namlen))
+		goto efault;
+	if (__put_user(0, dirent->d_name + namlen))
+		goto efault;
+	if (__put_user(d_type, (char  __user *) dirent + reclen - 1))
+		goto efault;
+	buf->previous = dirent;
+	dirent = (void __user *)dirent + reclen;
+	buf->current_dir = dirent;
+	buf->count -= reclen;
+	return 0;
+efault:
+	buf->error = -EFAULT;
+	return -EFAULT;
+}
+
+asmlinkage long compat_sys_getdents(unsigned int fd,
+		struct compat_linux_dirent __user *dirent, unsigned int count)
+{
+	struct file * file;
+	struct compat_linux_dirent __user * lastdirent;
+	struct compat_getdents_callback buf;
+	int error;
+
+	error = -EFAULT;
+	if (!access_ok(VERIFY_WRITE, dirent, count))
+		goto out;
+
+	error = -EBADF;
+	file = fget(fd);
+	if (!file)
+		goto out;
+
+	buf.current_dir = dirent;
+	buf.previous = NULL;
+	buf.count = count;
+	buf.error = 0;
+
+	error = vfs_readdir(file, compat_filldir, &buf);
+	if (error >= 0)
+		error = buf.error;
+	lastdirent = buf.previous;
+	if (lastdirent) {
+		if (put_user(file->f_pos, &lastdirent->d_off))
+			error = -EFAULT;
+		else
+			error = count - buf.count;
+	}
+	fput(file);
+out:
+	return error;
+}
+
+#ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
+
+struct compat_getdents_callback64 {
+	struct linux_dirent64 __user *current_dir;
+	struct linux_dirent64 __user *previous;
+	int count;
+	int error;
+};
+
+static int compat_filldir64(void * __buf, const char * name, int namlen, loff_t offset,
+		     u64 ino, unsigned int d_type)
+{
+	struct linux_dirent64 __user *dirent;
+	struct compat_getdents_callback64 *buf = __buf;
+	int reclen = ALIGN(offsetof(struct linux_dirent64, d_name) + namlen + 1,
+		sizeof(u64));
+	u64 off;
+
+	buf->error = -EINVAL;	/* only used if we fail.. */
+	if (reclen > buf->count)
+		return -EINVAL;
+	dirent = buf->previous;
+
+	if (dirent) {
+		if (__put_user_unaligned(offset, &dirent->d_off))
+			goto efault;
+	}
+	dirent = buf->current_dir;
+	if (__put_user_unaligned(ino, &dirent->d_ino))
+		goto efault;
+	off = 0;
+	if (__put_user_unaligned(off, &dirent->d_off))
+		goto efault;
+	if (__put_user(reclen, &dirent->d_reclen))
+		goto efault;
+	if (__put_user(d_type, &dirent->d_type))
+		goto efault;
+	if (copy_to_user(dirent->d_name, name, namlen))
+		goto efault;
+	if (__put_user(0, dirent->d_name + namlen))
+		goto efault;
+	buf->previous = dirent;
+	dirent = (void __user *)dirent + reclen;
+	buf->current_dir = dirent;
+	buf->count -= reclen;
+	return 0;
+efault:
+	buf->error = -EFAULT;
+	return -EFAULT;
+}
+
+asmlinkage long compat_sys_getdents64(unsigned int fd,
+		struct linux_dirent64 __user * dirent, unsigned int count)
+{
+	struct file * file;
+	struct linux_dirent64 __user * lastdirent;
+	struct compat_getdents_callback64 buf;
+	int error;
+
+	error = -EFAULT;
+	if (!access_ok(VERIFY_WRITE, dirent, count))
+		goto out;
+
+	error = -EBADF;
+	file = fget(fd);
+	if (!file)
+		goto out;
+
+	buf.current_dir = dirent;
+	buf.previous = NULL;
+	buf.count = count;
+	buf.error = 0;
+
+	error = vfs_readdir(file, compat_filldir64, &buf);
+	if (error >= 0)
+		error = buf.error;
+	lastdirent = buf.previous;
+	if (lastdirent) {
+		typeof(lastdirent->d_off) d_off = file->f_pos;
+		if (__put_user_unaligned(d_off, &lastdirent->d_off))
+			error = -EFAULT;
+		else
+			error = count - buf.count;
+	}
+	fput(file);
+out:
+	return error;
+}
+#endif /* ! __ARCH_OMIT_COMPAT_SYS_GETDENTS64 */
+
+static ssize_t compat_do_readv_writev(int type, struct file *file,
+			       const struct compat_iovec __user *uvector,
+			       unsigned long nr_segs, loff_t *pos)
+{
+	compat_ssize_t tot_len;
+	struct iovec iovstack[UIO_FASTIOV];
+	struct iovec *iov = iovstack;
+	ssize_t ret;
+	io_fn_t fn;
+	iov_fn_t fnv;
+
+	ret = -EINVAL;
+	if (!file->f_op)
+		goto out;
+
+	ret = -EFAULT;
+	if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
+		goto out;
+
+	tot_len = compat_rw_copy_check_uvector(type, uvector, nr_segs,
+					       UIO_FASTIOV, iovstack, &iov);
+	if (tot_len == 0) {
+		ret = 0;
+		goto out;
+	}
+
+	ret = rw_verify_area(type, file, pos, tot_len);
+	if (ret < 0)
+		goto out;
+
+	fnv = NULL;
+	if (type == READ) {
+		fn = file->f_op->read;
+		fnv = file->f_op->aio_read;
+	} else {
+		fn = (io_fn_t)file->f_op->write;
+		fnv = file->f_op->aio_write;
+	}
+
+	if (fnv)
+		ret = do_sync_readv_writev(file, iov, nr_segs, tot_len,
+						pos, fnv);
+	else
+		ret = do_loop_readv_writev(file, iov, nr_segs, pos, fn);
+
+out:
+	if (iov != iovstack)
+		kfree(iov);
+	if ((ret + (type == READ)) > 0) {
+		if (type == READ)
+			fsnotify_access(file);
+		else
+			fsnotify_modify(file);
+	}
+	return ret;
+}
+
+static size_t compat_readv(struct file *file,
+			   const struct compat_iovec __user *vec,
+			   unsigned long vlen, loff_t *pos)
+{
+	ssize_t ret = -EBADF;
+
+	if (!(file->f_mode & FMODE_READ))
+		goto out;
+
+	ret = -EINVAL;
+	if (!file->f_op || (!file->f_op->aio_read && !file->f_op->read))
+		goto out;
+
+	ret = compat_do_readv_writev(READ, file, vec, vlen, pos);
+
+out:
+	if (ret > 0)
+		add_rchar(current, ret);
+	inc_syscr(current);
+	return ret;
+}
+
+asmlinkage ssize_t
+compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec,
+		 unsigned long vlen)
+{
+	struct file *file;
+	int fput_needed;
+	ssize_t ret;
+
+	file = fget_light(fd, &fput_needed);
+	if (!file)
+		return -EBADF;
+	ret = compat_readv(file, vec, vlen, &file->f_pos);
+	fput_light(file, fput_needed);
+	return ret;
+}
+
+asmlinkage ssize_t
+compat_sys_preadv(unsigned long fd, const struct compat_iovec __user *vec,
+		  unsigned long vlen, u32 pos_low, u32 pos_high)
+{
+	loff_t pos = ((loff_t)pos_high << 32) | pos_low;
+	struct file *file;
+	int fput_needed;
+	ssize_t ret;
+
+	if (pos < 0)
+		return -EINVAL;
+	file = fget_light(fd, &fput_needed);
+	if (!file)
+		return -EBADF;
+	ret = -ESPIPE;
+	if (file->f_mode & FMODE_PREAD)
+		ret = compat_readv(file, vec, vlen, &pos);
+	fput_light(file, fput_needed);
+	return ret;
+}
+
+static size_t compat_writev(struct file *file,
+			    const struct compat_iovec __user *vec,
+			    unsigned long vlen, loff_t *pos)
+{
+	ssize_t ret = -EBADF;
+
+	if (!(file->f_mode & FMODE_WRITE))
+		goto out;
+
+	ret = -EINVAL;
+	if (!file->f_op || (!file->f_op->aio_write && !file->f_op->write))
+		goto out;
+
+	ret = compat_do_readv_writev(WRITE, file, vec, vlen, pos);
+
+out:
+	if (ret > 0)
+		add_wchar(current, ret);
+	inc_syscw(current);
+	return ret;
+}
+
+asmlinkage ssize_t
+compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec,
+		  unsigned long vlen)
+{
+	struct file *file;
+	int fput_needed;
+	ssize_t ret;
+
+	file = fget_light(fd, &fput_needed);
+	if (!file)
+		return -EBADF;
+	ret = compat_writev(file, vec, vlen, &file->f_pos);
+	fput_light(file, fput_needed);
+	return ret;
+}
+
+asmlinkage ssize_t
+compat_sys_pwritev(unsigned long fd, const struct compat_iovec __user *vec,
+		   unsigned long vlen, u32 pos_low, u32 pos_high)
+{
+	loff_t pos = ((loff_t)pos_high << 32) | pos_low;
+	struct file *file;
+	int fput_needed;
+	ssize_t ret;
+
+	if (pos < 0)
+		return -EINVAL;
+	file = fget_light(fd, &fput_needed);
+	if (!file)
+		return -EBADF;
+	ret = -ESPIPE;
+	if (file->f_mode & FMODE_PWRITE)
+		ret = compat_writev(file, vec, vlen, &pos);
+	fput_light(file, fput_needed);
+	return ret;
+}
+
+asmlinkage long
+compat_sys_vmsplice(int fd, const struct compat_iovec __user *iov32,
+		    unsigned int nr_segs, unsigned int flags)
+{
+	unsigned i;
+	struct iovec __user *iov;
+	if (nr_segs > UIO_MAXIOV)
+		return -EINVAL;
+	iov = compat_alloc_user_space(nr_segs * sizeof(struct iovec));
+	for (i = 0; i < nr_segs; i++) {
+		struct compat_iovec v;
+		if (get_user(v.iov_base, &iov32[i].iov_base) ||
+		    get_user(v.iov_len, &iov32[i].iov_len) ||
+		    put_user(compat_ptr(v.iov_base), &iov[i].iov_base) ||
+		    put_user(v.iov_len, &iov[i].iov_len))
+			return -EFAULT;
+	}
+	return sys_vmsplice(fd, iov, nr_segs, flags);
+}
+
+/*
+ * Exactly like fs/open.c:sys_open(), except that it doesn't set the
+ * O_LARGEFILE flag.
+ */
+asmlinkage long
+compat_sys_open(const char __user *filename, int flags, int mode)
+{
+	return do_sys_open(AT_FDCWD, filename, flags, mode);
+}
+
+/*
+ * Exactly like fs/open.c:sys_openat(), except that it doesn't set the
+ * O_LARGEFILE flag.
+ */
+asmlinkage long
+compat_sys_openat(unsigned int dfd, const char __user *filename, int flags, int mode)
+{
+	return do_sys_open(dfd, filename, flags, mode);
+}
+
+#define __COMPAT_NFDBITS       (8 * sizeof(compat_ulong_t))
+
+static int poll_select_copy_remaining(struct timespec *end_time, void __user *p,
+				      int timeval, int ret)
+{
+	struct timespec ts;
+
+	if (!p)
+		return ret;
+
+	if (current->personality & STICKY_TIMEOUTS)
+		goto sticky;
+
+	/* No update for zero timeout */
+	if (!end_time->tv_sec && !end_time->tv_nsec)
+		return ret;
+
+	ktime_get_ts(&ts);
+	ts = timespec_sub(*end_time, ts);
+	if (ts.tv_sec < 0)
+		ts.tv_sec = ts.tv_nsec = 0;
+
+	if (timeval) {
+		struct compat_timeval rtv;
+
+		rtv.tv_sec = ts.tv_sec;
+		rtv.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
+
+		if (!copy_to_user(p, &rtv, sizeof(rtv)))
+			return ret;
+	} else {
+		struct compat_timespec rts;
+
+		rts.tv_sec = ts.tv_sec;
+		rts.tv_nsec = ts.tv_nsec;
+
+		if (!copy_to_user(p, &rts, sizeof(rts)))
+			return ret;
+	}
+	/*
+	 * If an application puts its timeval in read-only memory, we
+	 * don't want the Linux-specific update to the timeval to
+	 * cause a fault after the select has completed
+	 * successfully. However, because we're not updating the
+	 * timeval, we can't restart the system call.
+	 */
+
+sticky:
+	if (ret == -ERESTARTNOHAND)
+		ret = -EINTR;
+	return ret;
+}
+
+/*
+ * Ooo, nasty.  We need here to frob 32-bit unsigned longs to
+ * 64-bit unsigned longs.
+ */
+static
+int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
+			unsigned long *fdset)
+{
+	nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
+	if (ufdset) {
+		unsigned long odd;
+
+		if (!access_ok(VERIFY_WRITE, ufdset, nr*sizeof(compat_ulong_t)))
+			return -EFAULT;
+
+		odd = nr & 1UL;
+		nr &= ~1UL;
+		while (nr) {
+			unsigned long h, l;
+			if (__get_user(l, ufdset) || __get_user(h, ufdset+1))
+				return -EFAULT;
+			ufdset += 2;
+			*fdset++ = h << 32 | l;
+			nr -= 2;
+		}
+		if (odd && __get_user(*fdset, ufdset))
+			return -EFAULT;
+	} else {
+		/* Tricky, must clear full unsigned long in the
+		 * kernel fdset at the end, this makes sure that
+		 * actually happens.
+		 */
+		memset(fdset, 0, ((nr + 1) & ~1)*sizeof(compat_ulong_t));
+	}
+	return 0;
+}
+
+static
+int compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
+		      unsigned long *fdset)
+{
+	unsigned long odd;
+	nr = DIV_ROUND_UP(nr, __COMPAT_NFDBITS);
+
+	if (!ufdset)
+		return 0;
+
+	odd = nr & 1UL;
+	nr &= ~1UL;
+	while (nr) {
+		unsigned long h, l;
+		l = *fdset++;
+		h = l >> 32;
+		if (__put_user(l, ufdset) || __put_user(h, ufdset+1))
+			return -EFAULT;
+		ufdset += 2;
+		nr -= 2;
+	}
+	if (odd && __put_user(*fdset, ufdset))
+		return -EFAULT;
+	return 0;
+}
+
+
+/*
+ * This is a virtual copy of sys_select from fs/select.c and probably
+ * should be compared to it from time to time
+ */
+
+/*
+ * We can actually return ERESTARTSYS instead of EINTR, but I'd
+ * like to be certain this leads to no problems. So I return
+ * EINTR just for safety.
+ *
+ * Update: ERESTARTSYS breaks at least the xview clock binary, so
+ * I'm trying ERESTARTNOHAND which restart only when you want to.
+ */
+int compat_core_sys_select(int n, compat_ulong_t __user *inp,
+	compat_ulong_t __user *outp, compat_ulong_t __user *exp,
+	struct timespec *end_time)
+{
+	fd_set_bits fds;
+	void *bits;
+	int size, max_fds, ret = -EINVAL;
+	struct fdtable *fdt;
+	long stack_fds[SELECT_STACK_ALLOC/sizeof(long)];
+
+	if (n < 0)
+		goto out_nofds;
+
+	/* max_fds can increase, so grab it once to avoid race */
+	rcu_read_lock();
+	fdt = files_fdtable(current->files);
+	max_fds = fdt->max_fds;
+	rcu_read_unlock();
+	if (n > max_fds)
+		n = max_fds;
+
+	/*
+	 * We need 6 bitmaps (in/out/ex for both incoming and outgoing),
+	 * since we used fdset we need to allocate memory in units of
+	 * long-words.
+	 */
+	size = FDS_BYTES(n);
+	bits = stack_fds;
+	if (size > sizeof(stack_fds) / 6) {
+		bits = kmalloc(6 * size, GFP_KERNEL);
+		ret = -ENOMEM;
+		if (!bits)
+			goto out_nofds;
+	}
+	fds.in      = (unsigned long *)  bits;
+	fds.out     = (unsigned long *) (bits +   size);
+	fds.ex      = (unsigned long *) (bits + 2*size);
+	fds.res_in  = (unsigned long *) (bits + 3*size);
+	fds.res_out = (unsigned long *) (bits + 4*size);
+	fds.res_ex  = (unsigned long *) (bits + 5*size);
+
+	if ((ret = compat_get_fd_set(n, inp, fds.in)) ||
+	    (ret = compat_get_fd_set(n, outp, fds.out)) ||
+	    (ret = compat_get_fd_set(n, exp, fds.ex)))
+		goto out;
+	zero_fd_set(n, fds.res_in);
+	zero_fd_set(n, fds.res_out);
+	zero_fd_set(n, fds.res_ex);
+
+	ret = do_select(n, &fds, end_time);
+
+	if (ret < 0)
+		goto out;
+	if (!ret) {
+		ret = -ERESTARTNOHAND;
+		if (signal_pending(current))
+			goto out;
+		ret = 0;
+	}
+
+	if (compat_set_fd_set(n, inp, fds.res_in) ||
+	    compat_set_fd_set(n, outp, fds.res_out) ||
+	    compat_set_fd_set(n, exp, fds.res_ex))
+		ret = -EFAULT;
+out:
+	if (bits != stack_fds)
+		kfree(bits);
+out_nofds:
+	return ret;
+}
+
+asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
+	compat_ulong_t __user *outp, compat_ulong_t __user *exp,
+	struct compat_timeval __user *tvp)
+{
+	struct timespec end_time, *to = NULL;
+	struct compat_timeval tv;
+	int ret;
+
+	if (tvp) {
+		if (copy_from_user(&tv, tvp, sizeof(tv)))
+			return -EFAULT;
+
+		to = &end_time;
+		if (poll_select_set_timeout(to,
+				tv.tv_sec + (tv.tv_usec / USEC_PER_SEC),
+				(tv.tv_usec % USEC_PER_SEC) * NSEC_PER_USEC))
+			return -EINVAL;
+	}
+
+	ret = compat_core_sys_select(n, inp, outp, exp, to);
+	ret = poll_select_copy_remaining(&end_time, tvp, 1, ret);
+
+	return ret;
+}
+
+struct compat_sel_arg_struct {
+	compat_ulong_t n;
+	compat_uptr_t inp;
+	compat_uptr_t outp;
+	compat_uptr_t exp;
+	compat_uptr_t tvp;
+};
+
+asmlinkage long compat_sys_old_select(struct compat_sel_arg_struct __user *arg)
+{
+	struct compat_sel_arg_struct a;
+
+	if (copy_from_user(&a, arg, sizeof(a)))
+		return -EFAULT;
+	return compat_sys_select(a.n, compat_ptr(a.inp), compat_ptr(a.outp),
+				 compat_ptr(a.exp), compat_ptr(a.tvp));
+}
+
+#ifdef HAVE_SET_RESTORE_SIGMASK
+static long do_compat_pselect(int n, compat_ulong_t __user *inp,
+	compat_ulong_t __user *outp, compat_ulong_t __user *exp,
+	struct compat_timespec __user *tsp, compat_sigset_t __user *sigmask,
+	compat_size_t sigsetsize)
+{
+	compat_sigset_t ss32;
+	sigset_t ksigmask, sigsaved;
+	struct compat_timespec ts;
+	struct timespec end_time, *to = NULL;
+	int ret;
+
+	if (tsp) {
+		if (copy_from_user(&ts, tsp, sizeof(ts)))
+			return -EFAULT;
+
+		to = &end_time;
+		if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
+			return -EINVAL;
+	}
+
+	if (sigmask) {
+		if (sigsetsize != sizeof(compat_sigset_t))
+			return -EINVAL;
+		if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
+			return -EFAULT;
+		sigset_from_compat(&ksigmask, &ss32);
+
+		sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
+		sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
+	}
+
+	ret = compat_core_sys_select(n, inp, outp, exp, to);
+	ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
+
+	if (ret == -ERESTARTNOHAND) {
+		/*
+		 * Don't restore the signal mask yet. Let do_signal() deliver
+		 * the signal on the way back to userspace, before the signal
+		 * mask is restored.
+		 */
+		if (sigmask) {
+			memcpy(&current->saved_sigmask, &sigsaved,
+					sizeof(sigsaved));
+			set_restore_sigmask();
+		}
+	} else if (sigmask)
+		sigprocmask(SIG_SETMASK, &sigsaved, NULL);
+
+	return ret;
+}
+
+asmlinkage long compat_sys_pselect6(int n, compat_ulong_t __user *inp,
+	compat_ulong_t __user *outp, compat_ulong_t __user *exp,
+	struct compat_timespec __user *tsp, void __user *sig)
+{
+	compat_size_t sigsetsize = 0;
+	compat_uptr_t up = 0;
+
+	if (sig) {
+		if (!access_ok(VERIFY_READ, sig,
+				sizeof(compat_uptr_t)+sizeof(compat_size_t)) ||
+		    	__get_user(up, (compat_uptr_t __user *)sig) ||
+		    	__get_user(sigsetsize,
+				(compat_size_t __user *)(sig+sizeof(up))))
+			return -EFAULT;
+	}
+	return do_compat_pselect(n, inp, outp, exp, tsp, compat_ptr(up),
+				 sigsetsize);
+}
+
+asmlinkage long compat_sys_ppoll(struct pollfd __user *ufds,
+	unsigned int nfds, struct compat_timespec __user *tsp,
+	const compat_sigset_t __user *sigmask, compat_size_t sigsetsize)
+{
+	compat_sigset_t ss32;
+	sigset_t ksigmask, sigsaved;
+	struct compat_timespec ts;
+	struct timespec end_time, *to = NULL;
+	int ret;
+
+	if (tsp) {
+		if (copy_from_user(&ts, tsp, sizeof(ts)))
+			return -EFAULT;
+
+		to = &end_time;
+		if (poll_select_set_timeout(to, ts.tv_sec, ts.tv_nsec))
+			return -EINVAL;
+	}
+
+	if (sigmask) {
+		if (sigsetsize != sizeof(compat_sigset_t))
+			return -EINVAL;
+		if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
+			return -EFAULT;
+		sigset_from_compat(&ksigmask, &ss32);
+
+		sigdelsetmask(&ksigmask, sigmask(SIGKILL)|sigmask(SIGSTOP));
+		sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
+	}
+
+	ret = do_sys_poll(ufds, nfds, to);
+
+	/* We can restart this syscall, usually */
+	if (ret == -EINTR) {
+		/*
+		 * Don't restore the signal mask yet. Let do_signal() deliver
+		 * the signal on the way back to userspace, before the signal
+		 * mask is restored.
+		 */
+		if (sigmask) {
+			memcpy(&current->saved_sigmask, &sigsaved,
+				sizeof(sigsaved));
+			set_restore_sigmask();
+		}
+		ret = -ERESTARTNOHAND;
+	} else if (sigmask)
+		sigprocmask(SIG_SETMASK, &sigsaved, NULL);
+
+	ret = poll_select_copy_remaining(&end_time, tsp, 0, ret);
+
+	return ret;
+}
+#endif /* HAVE_SET_RESTORE_SIGMASK */
+
+#if (defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)) && !defined(CONFIG_NFSD_DEPRECATED)
+/* Stuff for NFS server syscalls... */
+struct compat_nfsctl_svc {
+	u16			svc32_port;
+	s32			svc32_nthreads;
+};
+
+struct compat_nfsctl_client {
+	s8			cl32_ident[NFSCLNT_IDMAX+1];
+	s32			cl32_naddr;
+	struct in_addr		cl32_addrlist[NFSCLNT_ADDRMAX];
+	s32			cl32_fhkeytype;
+	s32			cl32_fhkeylen;
+	u8			cl32_fhkey[NFSCLNT_KEYMAX];
+};
+
+struct compat_nfsctl_export {
+	char		ex32_client[NFSCLNT_IDMAX+1];
+	char		ex32_path[NFS_MAXPATHLEN+1];
+	compat_dev_t	ex32_dev;
+	compat_ino_t	ex32_ino;
+	compat_int_t	ex32_flags;
+	__compat_uid_t	ex32_anon_uid;
+	__compat_gid_t	ex32_anon_gid;
+};
+
+struct compat_nfsctl_fdparm {
+	struct sockaddr		gd32_addr;
+	s8			gd32_path[NFS_MAXPATHLEN+1];
+	compat_int_t		gd32_version;
+};
+
+struct compat_nfsctl_fsparm {
+	struct sockaddr		gd32_addr;
+	s8			gd32_path[NFS_MAXPATHLEN+1];
+	compat_int_t		gd32_maxlen;
+};
+
+struct compat_nfsctl_arg {
+	compat_int_t		ca32_version;	/* safeguard */
+	union {
+		struct compat_nfsctl_svc	u32_svc;
+		struct compat_nfsctl_client	u32_client;
+		struct compat_nfsctl_export	u32_export;
+		struct compat_nfsctl_fdparm	u32_getfd;
+		struct compat_nfsctl_fsparm	u32_getfs;
+	} u;
+#define ca32_svc	u.u32_svc
+#define ca32_client	u.u32_client
+#define ca32_export	u.u32_export
+#define ca32_getfd	u.u32_getfd
+#define ca32_getfs	u.u32_getfs
+};
+
+union compat_nfsctl_res {
+	__u8			cr32_getfh[NFS_FHSIZE];
+	struct knfsd_fh		cr32_getfs;
+};
+
+static int compat_nfs_svc_trans(struct nfsctl_arg *karg,
+				struct compat_nfsctl_arg __user *arg)
+{
+	if (!access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc)) ||
+		get_user(karg->ca_version, &arg->ca32_version) ||
+		__get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port) ||
+		__get_user(karg->ca_svc.svc_nthreads,
+				&arg->ca32_svc.svc32_nthreads))
+		return -EFAULT;
+	return 0;
+}
+
+static int compat_nfs_clnt_trans(struct nfsctl_arg *karg,
+				struct compat_nfsctl_arg __user *arg)
+{
+	if (!access_ok(VERIFY_READ, &arg->ca32_client,
+			sizeof(arg->ca32_client)) ||
+		get_user(karg->ca_version, &arg->ca32_version) ||
+		__copy_from_user(&karg->ca_client.cl_ident[0],
+				&arg->ca32_client.cl32_ident[0],
+				NFSCLNT_IDMAX) ||
+		__get_user(karg->ca_client.cl_naddr,
+				&arg->ca32_client.cl32_naddr) ||
+		__copy_from_user(&karg->ca_client.cl_addrlist[0],
+				&arg->ca32_client.cl32_addrlist[0],
+				(sizeof(struct in_addr) * NFSCLNT_ADDRMAX)) ||
+		__get_user(karg->ca_client.cl_fhkeytype,
+				&arg->ca32_client.cl32_fhkeytype) ||
+		__get_user(karg->ca_client.cl_fhkeylen,
+				&arg->ca32_client.cl32_fhkeylen) ||
+		__copy_from_user(&karg->ca_client.cl_fhkey[0],
+				&arg->ca32_client.cl32_fhkey[0],
+				NFSCLNT_KEYMAX))
+		return -EFAULT;
+
+	return 0;
+}
+
+static int compat_nfs_exp_trans(struct nfsctl_arg *karg,
+				struct compat_nfsctl_arg __user *arg)
+{
+	if (!access_ok(VERIFY_READ, &arg->ca32_export,
+				sizeof(arg->ca32_export)) ||
+		get_user(karg->ca_version, &arg->ca32_version) ||
+		__copy_from_user(&karg->ca_export.ex_client[0],
+				&arg->ca32_export.ex32_client[0],
+				NFSCLNT_IDMAX) ||
+		__copy_from_user(&karg->ca_export.ex_path[0],
+				&arg->ca32_export.ex32_path[0],
+				NFS_MAXPATHLEN) ||
+		__get_user(karg->ca_export.ex_dev,
+				&arg->ca32_export.ex32_dev) ||
+		__get_user(karg->ca_export.ex_ino,
+				&arg->ca32_export.ex32_ino) ||
+		__get_user(karg->ca_export.ex_flags,
+				&arg->ca32_export.ex32_flags) ||
+		__get_user(karg->ca_export.ex_anon_uid,
+				&arg->ca32_export.ex32_anon_uid) ||
+		__get_user(karg->ca_export.ex_anon_gid,
+				&arg->ca32_export.ex32_anon_gid))
+		return -EFAULT;
+	SET_UID(karg->ca_export.ex_anon_uid, karg->ca_export.ex_anon_uid);
+	SET_GID(karg->ca_export.ex_anon_gid, karg->ca_export.ex_anon_gid);
+
+	return 0;
+}
+
+static int compat_nfs_getfd_trans(struct nfsctl_arg *karg,
+				struct compat_nfsctl_arg __user *arg)
+{
+	if (!access_ok(VERIFY_READ, &arg->ca32_getfd,
+			sizeof(arg->ca32_getfd)) ||
+		get_user(karg->ca_version, &arg->ca32_version) ||
+		__copy_from_user(&karg->ca_getfd.gd_addr,
+				&arg->ca32_getfd.gd32_addr,
+				(sizeof(struct sockaddr))) ||
+		__copy_from_user(&karg->ca_getfd.gd_path,
+				&arg->ca32_getfd.gd32_path,
+				(NFS_MAXPATHLEN+1)) ||
+		__get_user(karg->ca_getfd.gd_version,
+				&arg->ca32_getfd.gd32_version))
+		return -EFAULT;
+
+	return 0;
+}
+
+static int compat_nfs_getfs_trans(struct nfsctl_arg *karg,
+				struct compat_nfsctl_arg __user *arg)
+{
+	if (!access_ok(VERIFY_READ,&arg->ca32_getfs,sizeof(arg->ca32_getfs)) ||
+		get_user(karg->ca_version, &arg->ca32_version) ||
+		__copy_from_user(&karg->ca_getfs.gd_addr,
+				&arg->ca32_getfs.gd32_addr,
+				(sizeof(struct sockaddr))) ||
+		__copy_from_user(&karg->ca_getfs.gd_path,
+				&arg->ca32_getfs.gd32_path,
+				(NFS_MAXPATHLEN+1)) ||
+		__get_user(karg->ca_getfs.gd_maxlen,
+				&arg->ca32_getfs.gd32_maxlen))
+		return -EFAULT;
+
+	return 0;
+}
+
+/* This really doesn't need translations, we are only passing
+ * back a union which contains opaque nfs file handle data.
+ */
+static int compat_nfs_getfh_res_trans(union nfsctl_res *kres,
+				union compat_nfsctl_res __user *res)
+{
+	int err;
+
+	err = copy_to_user(res, kres, sizeof(*res));
+
+	return (err) ? -EFAULT : 0;
+}
+
+asmlinkage long compat_sys_nfsservctl(int cmd,
+				struct compat_nfsctl_arg __user *arg,
+				union compat_nfsctl_res __user *res)
+{
+	struct nfsctl_arg *karg;
+	union nfsctl_res *kres;
+	mm_segment_t oldfs;
+	int err;
+
+	karg = kmalloc(sizeof(*karg), GFP_USER);
+	kres = kmalloc(sizeof(*kres), GFP_USER);
+	if(!karg || !kres) {
+		err = -ENOMEM;
+		goto done;
+	}
+
+	switch(cmd) {
+	case NFSCTL_SVC:
+		err = compat_nfs_svc_trans(karg, arg);
+		break;
+
+	case NFSCTL_ADDCLIENT:
+		err = compat_nfs_clnt_trans(karg, arg);
+		break;
+
+	case NFSCTL_DELCLIENT:
+		err = compat_nfs_clnt_trans(karg, arg);
+		break;
+
+	case NFSCTL_EXPORT:
+	case NFSCTL_UNEXPORT:
+		err = compat_nfs_exp_trans(karg, arg);
+		break;
+
+	case NFSCTL_GETFD:
+		err = compat_nfs_getfd_trans(karg, arg);
+		break;
+
+	case NFSCTL_GETFS:
+		err = compat_nfs_getfs_trans(karg, arg);
+		break;
+
+	default:
+		err = -EINVAL;
+		break;
+	}
+
+	if (err)
+		goto done;
+
+	oldfs = get_fs();
+	set_fs(KERNEL_DS);
+	/* The __user pointer casts are valid because of the set_fs() */
+	err = sys_nfsservctl(cmd, (void __user *) karg, (void __user *) kres);
+	set_fs(oldfs);
+
+	if (err)
+		goto done;
+
+	if((cmd == NFSCTL_GETFD) ||
+	   (cmd == NFSCTL_GETFS))
+		err = compat_nfs_getfh_res_trans(kres, res);
+
+done:
+	kfree(karg);
+	kfree(kres);
+	return err;
+}
+#else /* !NFSD */
+long asmlinkage compat_sys_nfsservctl(int cmd, void *notused, void *notused2)
+{
+	return sys_ni_syscall();
+}
+#endif
+
+#ifdef CONFIG_EPOLL
+
+#ifdef HAVE_SET_RESTORE_SIGMASK
+asmlinkage long compat_sys_epoll_pwait(int epfd,
+			struct compat_epoll_event __user *events,
+			int maxevents, int timeout,
+			const compat_sigset_t __user *sigmask,
+			compat_size_t sigsetsize)
+{
+	long err;
+	compat_sigset_t csigmask;
+	sigset_t ksigmask, sigsaved;
+
+	/*
+	 * If the caller wants a certain signal mask to be set during the wait,
+	 * we apply it here.
+	 */
+	if (sigmask) {
+		if (sigsetsize != sizeof(compat_sigset_t))
+			return -EINVAL;
+		if (copy_from_user(&csigmask, sigmask, sizeof(csigmask)))
+			return -EFAULT;
+		sigset_from_compat(&ksigmask, &csigmask);
+		sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
+		sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
+	}
+
+	err = sys_epoll_wait(epfd, events, maxevents, timeout);
+
+	/*
+	 * If we changed the signal mask, we need to restore the original one.
+	 * In case we've got a signal while waiting, we do not restore the
+	 * signal mask yet, and we allow do_signal() to deliver the signal on
+	 * the way back to userspace, before the signal mask is restored.
+	 */
+	if (sigmask) {
+		if (err == -EINTR) {
+			memcpy(&current->saved_sigmask, &sigsaved,
+			       sizeof(sigsaved));
+			set_restore_sigmask();
+		} else
+			sigprocmask(SIG_SETMASK, &sigsaved, NULL);
+	}
+
+	return err;
+}
+#endif /* HAVE_SET_RESTORE_SIGMASK */
+
+#endif /* CONFIG_EPOLL */
+
+#ifdef CONFIG_SIGNALFD
+
+asmlinkage long compat_sys_signalfd4(int ufd,
+				     const compat_sigset_t __user *sigmask,
+				     compat_size_t sigsetsize, int flags)
+{
+	compat_sigset_t ss32;
+	sigset_t tmp;
+	sigset_t __user *ksigmask;
+
+	if (sigsetsize != sizeof(compat_sigset_t))
+		return -EINVAL;
+	if (copy_from_user(&ss32, sigmask, sizeof(ss32)))
+		return -EFAULT;
+	sigset_from_compat(&tmp, &ss32);
+	ksigmask = compat_alloc_user_space(sizeof(sigset_t));
+	if (copy_to_user(ksigmask, &tmp, sizeof(sigset_t)))
+		return -EFAULT;
+
+	return sys_signalfd4(ufd, ksigmask, sizeof(sigset_t), flags);
+}
+
+asmlinkage long compat_sys_signalfd(int ufd,
+				    const compat_sigset_t __user *sigmask,
+				    compat_size_t sigsetsize)
+{
+	return compat_sys_signalfd4(ufd, sigmask, sigsetsize, 0);
+}
+#endif /* CONFIG_SIGNALFD */
+
+#ifdef CONFIG_TIMERFD
+
+asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
+				   const struct compat_itimerspec __user *utmr,
+				   struct compat_itimerspec __user *otmr)
+{
+	int error;
+	struct itimerspec t;
+	struct itimerspec __user *ut;
+
+	if (get_compat_itimerspec(&t, utmr))
+		return -EFAULT;
+	ut = compat_alloc_user_space(2 * sizeof(struct itimerspec));
+	if (copy_to_user(&ut[0], &t, sizeof(t)))
+		return -EFAULT;
+	error = sys_timerfd_settime(ufd, flags, &ut[0], &ut[1]);
+	if (!error && otmr)
+		error = (copy_from_user(&t, &ut[1], sizeof(struct itimerspec)) ||
+			 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
+
+	return error;
+}
+
+asmlinkage long compat_sys_timerfd_gettime(int ufd,
+				   struct compat_itimerspec __user *otmr)
+{
+	int error;
+	struct itimerspec t;
+	struct itimerspec __user *ut;
+
+	ut = compat_alloc_user_space(sizeof(struct itimerspec));
+	error = sys_timerfd_gettime(ufd, ut);
+	if (!error)
+		error = (copy_from_user(&t, ut, sizeof(struct itimerspec)) ||
+			 put_compat_itimerspec(otmr, &t)) ? -EFAULT: 0;
+
+	return error;
+}
+
+#endif /* CONFIG_TIMERFD */
+
+#ifdef CONFIG_FHANDLE
+/*
+ * Exactly like fs/open.c:sys_open_by_handle_at(), except that it
+ * doesn't set the O_LARGEFILE flag.
+ */
+asmlinkage long
+compat_sys_open_by_handle_at(int mountdirfd,
+			     struct file_handle __user *handle, int flags)
+{
+	return do_handle_open(mountdirfd, handle, flags);
+}
+#endif