Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 1950 insertions, 0 deletions

diff --git a/fs/compat.c b/fs/compat.c
new file mode 100644
index 000000000000..a912bdf691cf
--- /dev/null
+++ b/fs/compat.c
@@ -0,0 +1,1950 @@
+/*
+ *  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@suse.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/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/vfs.h>
+#include <linux/ioctl32.h>
+#include <linux/ioctl.h>
+#include <linux/init.h>
+#include <linux/sockios.h>	/* for SIOCDEVPRIVATE */
+#include <linux/smb.h>
+#include <linux/smb_mount.h>
+#include <linux/ncp_mount.h>
+#include <linux/smp_lock.h>
+#include <linux/syscalls.h>
+#include <linux/ctype.h>
+#include <linux/module.h>
+#include <linux/dirent.h>
+#include <linux/dnotify.h>
+#include <linux/highuid.h>
+#include <linux/sunrpc/svc.h>
+#include <linux/nfsd/nfsd.h>
+#include <linux/nfsd/syscall.h>
+#include <linux/personality.h>
+#include <linux/rwsem.h>
+
+#include <net/sock.h>		/* siocdevprivate_ioctl */
+
+#include <asm/uaccess.h>
+#include <asm/mmu_context.h>
+#include <asm/ioctls.h>
+
+/*
+ * Not all architectures have sys_utime, so implement this in terms
+ * of sys_utimes.
+ */
+asmlinkage long compat_sys_utime(char __user *filename, struct compat_utimbuf __user *t)
+{
+	struct timeval 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_usec = 0;
+		tv[1].tv_usec = 0;
+	}
+	return do_utimes(filename, t ? tv : NULL);
+}
+
+asmlinkage long compat_sys_utimes(char __user *filename, struct compat_timeval __user *t)
+{
+	struct timeval tv[2];
+
+	if (t) { 
+		if (get_user(tv[0].tv_sec, &t[0].tv_sec) ||
+		    get_user(tv[0].tv_usec, &t[0].tv_usec) ||
+		    get_user(tv[1].tv_sec, &t[1].tv_sec) ||
+		    get_user(tv[1].tv_usec, &t[1].tv_usec))
+			return -EFAULT; 
+	} 
+	return do_utimes(filename, t ? tv : NULL);
+}
+
+asmlinkage long compat_sys_newstat(char __user * filename,
+		struct compat_stat __user *statbuf)
+{
+	struct kstat stat;
+	int error = vfs_stat(filename, &stat);
+
+	if (!error)
+		error = cp_compat_stat(&stat, statbuf);
+	return error;
+}
+
+asmlinkage long compat_sys_newlstat(char __user * filename,
+		struct compat_stat __user *statbuf)
+{
+	struct kstat stat;
+	int error = vfs_lstat(filename, &stat);
+
+	if (!error)
+		error = cp_compat_stat(&stat, statbuf);
+	return error;
+}
+
+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) &
+		    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/open.c and
+ * should be checked against those from time to time
+ */
+asmlinkage long compat_sys_statfs(const char __user *path, struct compat_statfs __user *buf)
+{
+	struct nameidata nd;
+	int error;
+
+	error = user_path_walk(path, &nd);
+	if (!error) {
+		struct kstatfs tmp;
+		error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
+		if (!error && put_compat_statfs(buf, &tmp))
+			error = -EFAULT;
+		path_release(&nd);
+	}
+	return error;
+}
+
+asmlinkage long compat_sys_fstatfs(unsigned int fd, struct compat_statfs __user *buf)
+{
+	struct file * file;
+	struct kstatfs tmp;
+	int error;
+
+	error = -EBADF;
+	file = fget(fd);
+	if (!file)
+		goto out;
+	error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
+	if (!error && put_compat_statfs(buf, &tmp))
+		error = -EFAULT;
+	fput(file);
+out:
+	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) &
+		    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))
+		return -EFAULT;
+	return 0;
+}
+
+asmlinkage long compat_sys_statfs64(const char __user *path, compat_size_t sz, struct compat_statfs64 __user *buf)
+{
+	struct nameidata nd;
+	int error;
+
+	if (sz != sizeof(*buf))
+		return -EINVAL;
+
+	error = user_path_walk(path, &nd);
+	if (!error) {
+		struct kstatfs tmp;
+		error = vfs_statfs(nd.dentry->d_inode->i_sb, &tmp);
+		if (!error && put_compat_statfs64(buf, &tmp))
+			error = -EFAULT;
+		path_release(&nd);
+	}
+	return error;
+}
+
+asmlinkage long compat_sys_fstatfs64(unsigned int fd, compat_size_t sz, struct compat_statfs64 __user *buf)
+{
+	struct file * file;
+	struct kstatfs tmp;
+	int error;
+
+	if (sz != sizeof(*buf))
+		return -EINVAL;
+
+	error = -EBADF;
+	file = fget(fd);
+	if (!file)
+		goto out;
+	error = vfs_statfs(file->f_dentry->d_inode->i_sb, &tmp);
+	if (!error && put_compat_statfs64(buf, &tmp))
+		error = -EFAULT;
+	fput(file);
+out:
+	return error;
+}
+
+/* ioctl32 stuff, used by sparc64, parisc, s390x, ppc64, x86_64, MIPS */
+
+#define IOCTL_HASHSIZE 256
+static struct ioctl_trans *ioctl32_hash_table[IOCTL_HASHSIZE];
+static DECLARE_RWSEM(ioctl32_sem);
+
+extern struct ioctl_trans ioctl_start[];
+extern int ioctl_table_size;
+
+static inline unsigned long ioctl32_hash(unsigned long cmd)
+{
+	return (((cmd >> 6) ^ (cmd >> 4) ^ cmd)) % IOCTL_HASHSIZE;
+}
+
+static void ioctl32_insert_translation(struct ioctl_trans *trans)
+{
+	unsigned long hash;
+	struct ioctl_trans *t;
+
+	hash = ioctl32_hash (trans->cmd);
+	if (!ioctl32_hash_table[hash])
+		ioctl32_hash_table[hash] = trans;
+	else {
+		t = ioctl32_hash_table[hash];
+		while (t->next)
+			t = t->next;
+		trans->next = NULL;
+		t->next = trans;
+	}
+}
+
+static int __init init_sys32_ioctl(void)
+{
+	int i;
+
+	for (i = 0; i < ioctl_table_size; i++) {
+		if (ioctl_start[i].next != 0) { 
+			printk("ioctl translation %d bad\n",i); 
+			return -1;
+		}
+
+		ioctl32_insert_translation(&ioctl_start[i]);
+	}
+	return 0;
+}
+
+__initcall(init_sys32_ioctl);
+
+int register_ioctl32_conversion(unsigned int cmd,
+				ioctl_trans_handler_t handler)
+{
+	struct ioctl_trans *t;
+	struct ioctl_trans *new_t;
+	unsigned long hash = ioctl32_hash(cmd);
+
+	new_t = kmalloc(sizeof(*new_t), GFP_KERNEL);
+	if (!new_t)
+		return -ENOMEM;
+
+	down_write(&ioctl32_sem);
+	for (t = ioctl32_hash_table[hash]; t; t = t->next) {
+		if (t->cmd == cmd) {
+			printk(KERN_ERR "Trying to register duplicated ioctl32 "
+					"handler %x\n", cmd);
+			up_write(&ioctl32_sem);
+			kfree(new_t);
+			return -EINVAL; 
+		}
+	}
+	new_t->next = NULL;
+	new_t->cmd = cmd;
+	new_t->handler = handler;
+	ioctl32_insert_translation(new_t);
+
+	up_write(&ioctl32_sem);
+	return 0;
+}
+EXPORT_SYMBOL(register_ioctl32_conversion);
+
+static inline int builtin_ioctl(struct ioctl_trans *t)
+{ 
+	return t >= ioctl_start && t < (ioctl_start + ioctl_table_size);
+} 
+
+/* Problem: 
+   This function cannot unregister duplicate ioctls, because they are not
+   unique.
+   When they happen we need to extend the prototype to pass the handler too. */
+
+int unregister_ioctl32_conversion(unsigned int cmd)
+{
+	unsigned long hash = ioctl32_hash(cmd);
+	struct ioctl_trans *t, *t1;
+
+	down_write(&ioctl32_sem);
+
+	t = ioctl32_hash_table[hash];
+	if (!t) { 
+		up_write(&ioctl32_sem);
+		return -EINVAL;
+	} 
+
+	if (t->cmd == cmd) { 
+		if (builtin_ioctl(t)) {
+			printk("%p tried to unregister builtin ioctl %x\n",
+			       __builtin_return_address(0), cmd);
+		} else { 
+			ioctl32_hash_table[hash] = t->next;
+			up_write(&ioctl32_sem);
+			kfree(t);
+			return 0;
+		}
+	} 
+	while (t->next) {
+		t1 = t->next;
+		if (t1->cmd == cmd) { 
+			if (builtin_ioctl(t1)) {
+				printk("%p tried to unregister builtin "
+					"ioctl %x\n",
+					__builtin_return_address(0), cmd);
+				goto out;
+			} else { 
+				t->next = t1->next;
+				up_write(&ioctl32_sem);
+				kfree(t1);
+				return 0;
+			}
+		}
+		t = t1;
+	}
+	printk(KERN_ERR "Trying to free unknown 32bit ioctl handler %x\n",
+				cmd);
+out:
+	up_write(&ioctl32_sem);
+	return -EINVAL;
+}
+EXPORT_SYMBOL(unregister_ioctl32_conversion); 
+
+static void compat_ioctl_error(struct file *filp, unsigned int fd,
+		unsigned int cmd, unsigned long arg)
+{
+	char buf[10];
+	char *fn = "?";
+	char *path;
+
+	/* find the name of the device. */
+	path = (char *)__get_free_page(GFP_KERNEL);
+	if (path) {
+		fn = d_path(filp->f_dentry, filp->f_vfsmnt, path, PAGE_SIZE);
+		if (IS_ERR(fn))
+			fn = "?";
+	}
+
+	sprintf(buf,"'%c'", (cmd>>24) & 0x3f);
+	if (!isprint(buf[1]))
+		sprintf(buf, "%02x", buf[1]);
+	printk("ioctl32(%s:%d): Unknown cmd fd(%d) "
+			"cmd(%08x){%s} arg(%08x) on %s\n",
+			current->comm, current->pid,
+			(int)fd, (unsigned int)cmd, buf,
+			(unsigned int)arg, fn);
+
+	if (path)
+		free_page((unsigned long)path);
+}
+
+asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
+				unsigned long arg)
+{
+	struct file *filp;
+	int error = -EBADF;
+	struct ioctl_trans *t;
+	int fput_needed;
+
+	filp = fget_light(fd, &fput_needed);
+	if (!filp)
+		goto out;
+
+	/* RED-PEN how should LSM module know it's handling 32bit? */
+	error = security_file_ioctl(filp, cmd, arg);
+	if (error)
+		goto out_fput;
+
+	/*
+	 * To allow the compat_ioctl handlers to be self contained
+	 * we need to check the common ioctls here first.
+	 * Just handle them with the standard handlers below.
+	 */
+	switch (cmd) {
+	case FIOCLEX:
+	case FIONCLEX:
+	case FIONBIO:
+	case FIOASYNC:
+	case FIOQSIZE:
+		break;
+
+	case FIBMAP:
+	case FIGETBSZ:
+	case FIONREAD:
+		if (S_ISREG(filp->f_dentry->d_inode->i_mode))
+			break;
+		/*FALL THROUGH*/
+
+	default:
+		if (filp->f_op && filp->f_op->compat_ioctl) {
+			error = filp->f_op->compat_ioctl(filp, cmd, arg);
+			if (error != -ENOIOCTLCMD)
+				goto out_fput;
+		}
+
+		if (!filp->f_op ||
+		    (!filp->f_op->ioctl && !filp->f_op->unlocked_ioctl))
+			goto do_ioctl;
+		break;
+	}
+
+	/* When register_ioctl32_conversion is finally gone remove
+	   this lock! -AK */
+	down_read(&ioctl32_sem);
+	for (t = ioctl32_hash_table[ioctl32_hash(cmd)]; t; t = t->next) {
+		if (t->cmd == cmd)
+			goto found_handler;
+	}
+	up_read(&ioctl32_sem);
+
+	if (S_ISSOCK(filp->f_dentry->d_inode->i_mode) &&
+	    cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
+		error = siocdevprivate_ioctl(fd, cmd, arg);
+	} else {
+		static int count;
+
+		if (++count <= 50)
+			compat_ioctl_error(filp, fd, cmd, arg);
+		error = -EINVAL;
+	}
+
+	goto out_fput;
+
+ found_handler:
+	if (t->handler) {
+		lock_kernel();
+		error = t->handler(fd, cmd, arg, filp);
+		unlock_kernel();
+		up_read(&ioctl32_sem);
+		goto out_fput;
+	}
+
+	up_read(&ioctl32_sem);
+ do_ioctl:
+	error = vfs_ioctl(filp, fd, cmd, arg);
+ out_fput:
+	fput_light(filp, fput_needed);
+ out:
+	return error;
+}
+
+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) {
+			if ((f.l_start >= COMPAT_OFF_T_MAX) ||
+			    ((f.l_start + f.l_len) > COMPAT_OFF_T_MAX))
+				ret = -EOVERFLOW;
+			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) {
+			if ((f.l_start >= COMPAT_LOFF_T_MAX) ||
+			    ((f.l_start + f.l_len) > COMPAT_LOFF_T_MAX))
+				ret = -EOVERFLOW;
+			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;
+}
+
+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 = sys_io_submit(ctx_id, nr, iocb64);
+	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_smb_mount_data {
+	compat_int_t version;
+	compat_uid_t mounted_uid;
+	compat_uid_t uid;
+	compat_gid_t gid;
+	compat_mode_t file_mode;
+	compat_mode_t dir_mode;
+};
+
+static void *do_smb_super_data_conv(void *raw_data)
+{
+	struct smb_mount_data *s = raw_data;
+	struct compat_smb_mount_data *c_s = raw_data;
+
+	if (c_s->version != SMB_MOUNT_OLDVERSION)
+		goto out;
+	s->dir_mode = c_s->dir_mode;
+	s->file_mode = c_s->file_mode;
+	s->gid = c_s->gid;
+	s->uid = c_s->uid;
+	s->mounted_uid = c_s->mounted_uid;
+ out:
+	return raw_data;
+}
+
+extern int copy_mount_options (const void __user *, unsigned long *);
+
+#define SMBFS_NAME      "smbfs"
+#define NCPFS_NAME      "ncpfs"
+
+asmlinkage long compat_sys_mount(char __user * dev_name, char __user * dir_name,
+				 char __user * type, unsigned long flags,
+				 void __user * data)
+{
+	unsigned long type_page;
+	unsigned long data_page;
+	unsigned long dev_page;
+	char *dir_page;
+	int retval;
+
+	retval = copy_mount_options (type, &type_page);
+	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_options (dev_name, &dev_page);
+	if (retval < 0)
+		goto out2;
+
+	retval = copy_mount_options (data, &data_page);
+	if (retval < 0)
+		goto out3;
+
+	retval = -EINVAL;
+
+	if (type_page) {
+		if (!strcmp((char *)type_page, SMBFS_NAME)) {
+			do_smb_super_data_conv((void *)data_page);
+		} else if (!strcmp((char *)type_page, NCPFS_NAME)) {
+			do_ncp_super_data_conv((void *)data_page);
+		}
+	}
+
+	lock_kernel();
+	retval = do_mount((char*)dev_page, dir_page, (char*)type_page,
+			flags, (void*)data_page);
+	unlock_kernel();
+
+	free_page(data_page);
+ out3:
+	free_page(dev_page);
+ out2:
+	putname(dir_page);
+ out1:
+	free_page(type_page);
+ out:
+	return retval;
+}
+
+#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
+#define COMPAT_ROUND_UP(x) (((x)+sizeof(compat_long_t)-1) & \
+				~(sizeof(compat_long_t)-1))
+
+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, ino_t ino, unsigned int d_type)
+{
+	struct compat_readdir_callback *buf = __buf;
+	struct compat_old_linux_dirent __user *dirent;
+
+	if (buf->result)
+		return -EINVAL;
+	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(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 (error >= 0)
+		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, ino_t ino, unsigned int d_type)
+{
+	struct compat_linux_dirent __user * dirent;
+	struct compat_getdents_callback *buf = __buf;
+	int reclen = COMPAT_ROUND_UP(NAME_OFFSET(dirent) + namlen + 2);
+
+	buf->error = -EINVAL;	/* only used if we fail.. */
+	if (reclen > buf->count)
+		return -EINVAL;
+	dirent = buf->previous;
+	if (dirent) {
+		if (__put_user(offset, &dirent->d_off))
+			goto efault;
+	}
+	dirent = buf->current_dir;
+	if (__put_user(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)
+		goto out_putf;
+	error = buf.error;
+	lastdirent = buf.previous;
+	if (lastdirent) {
+		if (put_user(file->f_pos, &lastdirent->d_off))
+			error = -EFAULT;
+		else
+			error = count - buf.count;
+	}
+
+out_putf:
+	fput(file);
+out:
+	return error;
+}
+
+#ifndef __ARCH_OMIT_COMPAT_SYS_GETDENTS64
+#define COMPAT_ROUND_UP64(x) (((x)+sizeof(u64)-1) & ~(sizeof(u64)-1))
+
+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,
+		     ino_t ino, unsigned int d_type)
+{
+	struct linux_dirent64 __user *dirent;
+	struct compat_getdents_callback64 *buf = __buf;
+	int jj = NAME_OFFSET(dirent);
+	int reclen = COMPAT_ROUND_UP64(jj + namlen + 1);
+	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)
+		goto out_putf;
+	error = buf.error;
+	lastdirent = buf.previous;
+	if (lastdirent) {
+		typeof(lastdirent->d_off) d_off = file->f_pos;
+		__put_user_unaligned(d_off, &lastdirent->d_off);
+		error = count - buf.count;
+	}
+
+out_putf:
+	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)
+{
+	typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *);
+	typedef ssize_t (*iov_fn_t)(struct file *, const struct iovec *, unsigned long, loff_t *);
+
+	compat_ssize_t tot_len;
+	struct iovec iovstack[UIO_FASTIOV];
+	struct iovec *iov=iovstack, *vector;
+	ssize_t ret;
+	int seg;
+	io_fn_t fn;
+	iov_fn_t fnv;
+
+	/*
+	 * 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...
+	 */
+	ret = 0;
+	if (nr_segs == 0)
+		goto out;
+
+	/*
+	 * First get the "struct iovec" from user memory and
+	 * verify all the pointers
+	 */
+	ret = -EINVAL;
+	if ((nr_segs > UIO_MAXIOV) || (nr_segs <= 0))
+		goto out;
+	if (!file->f_op)
+		goto out;
+	if (nr_segs > UIO_FASTIOV) {
+		ret = -ENOMEM;
+		iov = kmalloc(nr_segs*sizeof(struct iovec), GFP_KERNEL);
+		if (!iov)
+			goto out;
+	}
+	ret = -EFAULT;
+	if (!access_ok(VERIFY_READ, uvector, nr_segs*sizeof(*uvector)))
+		goto out;
+
+	/*
+	 * Single unix specification:
+	 * We should -EINVAL if an element length is not >= 0 and fitting an
+	 * ssize_t.  The total length is fitting an ssize_t
+	 *
+	 * Be careful here because iov_len is a size_t not an ssize_t
+	 */
+	tot_len = 0;
+	vector = iov;
+	ret = -EINVAL;
+	for (seg = 0 ; seg < nr_segs; seg++) {
+		compat_ssize_t tmp = tot_len;
+		compat_ssize_t len;
+		compat_uptr_t buf;
+
+		if (__get_user(len, &uvector->iov_len) ||
+		    __get_user(buf, &uvector->iov_base)) {
+			ret = -EFAULT;
+			goto out;
+		}
+		if (len < 0)	/* size_t not fitting an compat_ssize_t .. */
+			goto out;
+		tot_len += len;
+		if (tot_len < tmp) /* maths overflow on the compat_ssize_t */
+			goto out;
+		vector->iov_base = compat_ptr(buf);
+		vector->iov_len = (compat_size_t) len;
+		uvector++;
+		vector++;
+	}
+	if (tot_len == 0) {
+		ret = 0;
+		goto out;
+	}
+
+	ret = rw_verify_area(type, file, pos, tot_len);
+	if (ret)
+		goto out;
+
+	fnv = NULL;
+	if (type == READ) {
+		fn = file->f_op->read;
+		fnv = file->f_op->readv;
+	} else {
+		fn = (io_fn_t)file->f_op->write;
+		fnv = file->f_op->writev;
+	}
+	if (fnv) {
+		ret = fnv(file, iov, nr_segs, pos);
+		goto out;
+	}
+
+	/* Do it by hand, with file-ops */
+	ret = 0;
+	vector = iov;
+	while (nr_segs > 0) {
+		void __user * base;
+		size_t len;
+		ssize_t nr;
+
+		base = vector->iov_base;
+		len = vector->iov_len;
+		vector++;
+		nr_segs--;
+
+		nr = fn(file, base, len, pos);
+
+		if (nr < 0) {
+			if (!ret) ret = nr;
+			break;
+		}
+		ret += nr;
+		if (nr != len)
+			break;
+	}
+out:
+	if (iov != iovstack)
+		kfree(iov);
+	if ((ret + (type == READ)) > 0)
+		dnotify_parent(file->f_dentry,
+				(type == READ) ? DN_ACCESS : DN_MODIFY);
+	return ret;
+}
+
+asmlinkage ssize_t
+compat_sys_readv(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
+{
+	struct file *file;
+	ssize_t ret = -EBADF;
+
+	file = fget(fd);
+	if (!file)
+		return -EBADF;
+
+	if (!(file->f_mode & FMODE_READ))
+		goto out;
+
+	ret = -EINVAL;
+	if (!file->f_op || (!file->f_op->readv && !file->f_op->read))
+		goto out;
+
+	ret = compat_do_readv_writev(READ, file, vec, vlen, &file->f_pos);
+
+out:
+	fput(file);
+	return ret;
+}
+
+asmlinkage ssize_t
+compat_sys_writev(unsigned long fd, const struct compat_iovec __user *vec, unsigned long vlen)
+{
+	struct file *file;
+	ssize_t ret = -EBADF;
+
+	file = fget(fd);
+	if (!file)
+		return -EBADF;
+	if (!(file->f_mode & FMODE_WRITE))
+		goto out;
+
+	ret = -EINVAL;
+	if (!file->f_op || (!file->f_op->writev && !file->f_op->write))
+		goto out;
+
+	ret = compat_do_readv_writev(WRITE, file, vec, vlen, &file->f_pos);
+
+out:
+	fput(file);
+	return ret;
+}
+
+/*
+ * compat_count() counts the number of arguments/envelopes. It is basically
+ * a copy of count() from fs/exec.c, except that it works with 32 bit argv
+ * and envp pointers.
+ */
+static int compat_count(compat_uptr_t __user *argv, int max)
+{
+	int i = 0;
+
+	if (argv != NULL) {
+		for (;;) {
+			compat_uptr_t p;
+
+			if (get_user(p, argv))
+				return -EFAULT;
+			if (!p)
+				break;
+			argv++;
+			if(++i > max)
+				return -E2BIG;
+		}
+	}
+	return i;
+}
+
+/*
+ * compat_copy_strings() is basically a copy of copy_strings() from fs/exec.c
+ * except that it works with 32 bit argv and envp pointers.
+ */
+static int compat_copy_strings(int argc, compat_uptr_t __user *argv,
+				struct linux_binprm *bprm)
+{
+	struct page *kmapped_page = NULL;
+	char *kaddr = NULL;
+	int ret;
+
+	while (argc-- > 0) {
+		compat_uptr_t str;
+		int len;
+		unsigned long pos;
+
+		if (get_user(str, argv+argc) ||
+			!(len = strnlen_user(compat_ptr(str), bprm->p))) {
+			ret = -EFAULT;
+			goto out;
+		}
+
+		if (bprm->p < len)  {
+			ret = -E2BIG;
+			goto out;
+		}
+
+		bprm->p -= len;
+		/* XXX: add architecture specific overflow check here. */
+		pos = bprm->p;
+
+		while (len > 0) {
+			int i, new, err;
+			int offset, bytes_to_copy;
+			struct page *page;
+
+			offset = pos % PAGE_SIZE;
+			i = pos/PAGE_SIZE;
+			page = bprm->page[i];
+			new = 0;
+			if (!page) {
+				page = alloc_page(GFP_HIGHUSER);
+				bprm->page[i] = page;
+				if (!page) {
+					ret = -ENOMEM;
+					goto out;
+				}
+				new = 1;
+			}
+
+			if (page != kmapped_page) {
+				if (kmapped_page)
+					kunmap(kmapped_page);
+				kmapped_page = page;
+				kaddr = kmap(kmapped_page);
+			}
+			if (new && offset)
+				memset(kaddr, 0, offset);
+			bytes_to_copy = PAGE_SIZE - offset;
+			if (bytes_to_copy > len) {
+				bytes_to_copy = len;
+				if (new)
+					memset(kaddr+offset+len, 0,
+						PAGE_SIZE-offset-len);
+			}
+			err = copy_from_user(kaddr+offset, compat_ptr(str),
+						bytes_to_copy);
+			if (err) {
+				ret = -EFAULT;
+				goto out;
+			}
+
+			pos += bytes_to_copy;
+			str += bytes_to_copy;
+			len -= bytes_to_copy;
+		}
+	}
+	ret = 0;
+out:
+	if (kmapped_page)
+		kunmap(kmapped_page);
+	return ret;
+}
+
+#ifdef CONFIG_MMU
+
+#define free_arg_pages(bprm) do { } while (0)
+
+#else
+
+static inline void free_arg_pages(struct linux_binprm *bprm)
+{
+	int i;
+
+	for (i = 0; i < MAX_ARG_PAGES; i++) {
+		if (bprm->page[i])
+			__free_page(bprm->page[i]);
+		bprm->page[i] = NULL;
+	}
+}
+
+#endif /* CONFIG_MMU */
+
+/*
+ * compat_do_execve() is mostly a copy of do_execve(), with the exception
+ * that it processes 32 bit argv and envp pointers.
+ */
+int compat_do_execve(char * filename,
+	compat_uptr_t __user *argv,
+	compat_uptr_t __user *envp,
+	struct pt_regs * regs)
+{
+	struct linux_binprm *bprm;
+	struct file *file;
+	int retval;
+	int i;
+
+	retval = -ENOMEM;
+	bprm = kmalloc(sizeof(*bprm), GFP_KERNEL);
+	if (!bprm)
+		goto out_ret;
+	memset(bprm, 0, sizeof(*bprm));
+
+	file = open_exec(filename);
+	retval = PTR_ERR(file);
+	if (IS_ERR(file))
+		goto out_kfree;
+
+	sched_exec();
+
+	bprm->p = PAGE_SIZE*MAX_ARG_PAGES-sizeof(void *);
+	bprm->file = file;
+	bprm->filename = filename;
+	bprm->interp = filename;
+	bprm->mm = mm_alloc();
+	retval = -ENOMEM;
+	if (!bprm->mm)
+		goto out_file;
+
+	retval = init_new_context(current, bprm->mm);
+	if (retval < 0)
+		goto out_mm;
+
+	bprm->argc = compat_count(argv, bprm->p / sizeof(compat_uptr_t));
+	if ((retval = bprm->argc) < 0)
+		goto out_mm;
+
+	bprm->envc = compat_count(envp, bprm->p / sizeof(compat_uptr_t));
+	if ((retval = bprm->envc) < 0)
+		goto out_mm;
+
+	retval = security_bprm_alloc(bprm);
+	if (retval)
+		goto out;
+
+	retval = prepare_binprm(bprm);
+	if (retval < 0)
+		goto out;
+
+	retval = copy_strings_kernel(1, &bprm->filename, bprm);
+	if (retval < 0)
+		goto out;
+
+	bprm->exec = bprm->p;
+	retval = compat_copy_strings(bprm->envc, envp, bprm);
+	if (retval < 0)
+		goto out;
+
+	retval = compat_copy_strings(bprm->argc, argv, bprm);
+	if (retval < 0)
+		goto out;
+
+	retval = search_binary_handler(bprm, regs);
+	if (retval >= 0) {
+		free_arg_pages(bprm);
+
+		/* execve success */
+		security_bprm_free(bprm);
+		kfree(bprm);
+		return retval;
+	}
+
+out:
+	/* Something went wrong, return the inode and free the argument pages*/
+	for (i = 0 ; i < MAX_ARG_PAGES ; i++) {
+		struct page * page = bprm->page[i];
+		if (page)
+			__free_page(page);
+	}
+
+	if (bprm->security)
+		security_bprm_free(bprm);
+
+out_mm:
+	if (bprm->mm)
+		mmdrop(bprm->mm);
+
+out_file:
+	if (bprm->file) {
+		allow_write_access(bprm->file);
+		fput(bprm->file);
+	}
+
+out_kfree:
+	kfree(bprm);
+
+out_ret:
+	return retval;
+}
+
+#define __COMPAT_NFDBITS       (8 * sizeof(compat_ulong_t))
+
+#define ROUND_UP(x,y) (((x)+(y)-1)/(y))
+
+/*
+ * Ooo, nasty.  We need here to frob 32-bit unsigned longs to
+ * 64-bit unsigned longs.
+ */
+static inline
+int compat_get_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
+			unsigned long *fdset)
+{
+	nr = 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;
+			__get_user(l, ufdset);
+			__get_user(h, ufdset+1);
+			ufdset += 2;
+			*fdset++ = h << 32 | l;
+			nr -= 2;
+		}
+		if (odd)
+			__get_user(*fdset, ufdset);
+	} 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 inline
+void compat_set_fd_set(unsigned long nr, compat_ulong_t __user *ufdset,
+			unsigned long *fdset)
+{
+	unsigned long odd;
+	nr = ROUND_UP(nr, __COMPAT_NFDBITS);
+
+	if (!ufdset)
+		return;
+
+	odd = nr & 1UL;
+	nr &= ~1UL;
+	while (nr) {
+		unsigned long h, l;
+		l = *fdset++;
+		h = l >> 32;
+		__put_user(l, ufdset);
+		__put_user(h, ufdset+1);
+		ufdset += 2;
+		nr -= 2;
+	}
+	if (odd)
+		__put_user(*fdset, ufdset);
+}
+
+
+/*
+ * This is a virtual copy of sys_select from fs/select.c and probably
+ * should be compared to it from time to time
+ */
+static void *select_bits_alloc(int size)
+{
+	return kmalloc(6 * size, GFP_KERNEL);
+}
+
+static void select_bits_free(void *bits, int size)
+{
+	kfree(bits);
+}
+
+/*
+ * 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.
+ */
+#define MAX_SELECT_SECONDS \
+	((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1)
+
+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)
+{
+	fd_set_bits fds;
+	char *bits;
+	long timeout;
+	int size, max_fdset, ret = -EINVAL;
+
+	timeout = MAX_SCHEDULE_TIMEOUT;
+	if (tvp) {
+		time_t sec, usec;
+
+		if (!access_ok(VERIFY_READ, tvp, sizeof(*tvp))
+		    || __get_user(sec, &tvp->tv_sec)
+		    || __get_user(usec, &tvp->tv_usec)) {
+			ret = -EFAULT;
+			goto out_nofds;
+		}
+
+		if (sec < 0 || usec < 0)
+			goto out_nofds;
+
+		if ((unsigned long) sec < MAX_SELECT_SECONDS) {
+			timeout = ROUND_UP(usec, 1000000/HZ);
+			timeout += sec * (unsigned long) HZ;
+		}
+	}
+
+	if (n < 0)
+		goto out_nofds;
+
+	/* max_fdset can increase, so grab it once to avoid race */
+	max_fdset = current->files->max_fdset;
+	if (n > max_fdset)
+		n = max_fdset;
+
+	/*
+	 * 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.
+	 */
+	ret = -ENOMEM;
+	size = FDS_BYTES(n);
+	bits = select_bits_alloc(size);
+	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, &timeout);
+
+	if (tvp && !(current->personality & STICKY_TIMEOUTS)) {
+		time_t sec = 0, usec = 0;
+		if (timeout) {
+			sec = timeout / HZ;
+			usec = timeout % HZ;
+			usec *= (1000000/HZ);
+		}
+		if (put_user(sec, &tvp->tv_sec) ||
+		    put_user(usec, &tvp->tv_usec))
+			ret = -EFAULT;
+	}
+
+	if (ret < 0)
+		goto out;
+	if (!ret) {
+		ret = -ERESTARTNOHAND;
+		if (signal_pending(current))
+			goto out;
+		ret = 0;
+	}
+
+	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);
+
+out:
+	select_bits_free(bits, size);
+out_nofds:
+	return ret;
+}
+
+#if defined(CONFIG_NFSD) || defined(CONFIG_NFSD_MODULE)
+/* 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)
+{
+	int err;
+
+	err = access_ok(VERIFY_READ, &arg->ca32_svc, sizeof(arg->ca32_svc));
+	err |= get_user(karg->ca_version, &arg->ca32_version);
+	err |= __get_user(karg->ca_svc.svc_port, &arg->ca32_svc.svc32_port);
+	err |= __get_user(karg->ca_svc.svc_nthreads, &arg->ca32_svc.svc32_nthreads);
+	return (err) ? -EFAULT : 0;
+}
+
+static int compat_nfs_clnt_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
+{
+	int err;
+
+	err = access_ok(VERIFY_READ, &arg->ca32_client, sizeof(arg->ca32_client));
+	err |= get_user(karg->ca_version, &arg->ca32_version);
+	err |= __copy_from_user(&karg->ca_client.cl_ident[0],
+			  &arg->ca32_client.cl32_ident[0],
+			  NFSCLNT_IDMAX);
+	err |= __get_user(karg->ca_client.cl_naddr, &arg->ca32_client.cl32_naddr);
+	err |= __copy_from_user(&karg->ca_client.cl_addrlist[0],
+			  &arg->ca32_client.cl32_addrlist[0],
+			  (sizeof(struct in_addr) * NFSCLNT_ADDRMAX));
+	err |= __get_user(karg->ca_client.cl_fhkeytype,
+		      &arg->ca32_client.cl32_fhkeytype);
+	err |= __get_user(karg->ca_client.cl_fhkeylen,
+		      &arg->ca32_client.cl32_fhkeylen);
+	err |= __copy_from_user(&karg->ca_client.cl_fhkey[0],
+			  &arg->ca32_client.cl32_fhkey[0],
+			  NFSCLNT_KEYMAX);
+
+	return (err) ? -EFAULT : 0;
+}
+
+static int compat_nfs_exp_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
+{
+	int err;
+
+	err = access_ok(VERIFY_READ, &arg->ca32_export, sizeof(arg->ca32_export));
+	err |= get_user(karg->ca_version, &arg->ca32_version);
+	err |= __copy_from_user(&karg->ca_export.ex_client[0],
+			  &arg->ca32_export.ex32_client[0],
+			  NFSCLNT_IDMAX);
+	err |= __copy_from_user(&karg->ca_export.ex_path[0],
+			  &arg->ca32_export.ex32_path[0],
+			  NFS_MAXPATHLEN);
+	err |= __get_user(karg->ca_export.ex_dev,
+		      &arg->ca32_export.ex32_dev);
+	err |= __get_user(karg->ca_export.ex_ino,
+		      &arg->ca32_export.ex32_ino);
+	err |= __get_user(karg->ca_export.ex_flags,
+		      &arg->ca32_export.ex32_flags);
+	err |= __get_user(karg->ca_export.ex_anon_uid,
+		      &arg->ca32_export.ex32_anon_uid);
+	err |= __get_user(karg->ca_export.ex_anon_gid,
+		      &arg->ca32_export.ex32_anon_gid);
+	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 (err) ? -EFAULT : 0;
+}
+
+static int compat_nfs_getfd_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
+{
+	int err;
+
+	err = access_ok(VERIFY_READ, &arg->ca32_getfd, sizeof(arg->ca32_getfd));
+	err |= get_user(karg->ca_version, &arg->ca32_version);
+	err |= __copy_from_user(&karg->ca_getfd.gd_addr,
+			  &arg->ca32_getfd.gd32_addr,
+			  (sizeof(struct sockaddr)));
+	err |= __copy_from_user(&karg->ca_getfd.gd_path,
+			  &arg->ca32_getfd.gd32_path,
+			  (NFS_MAXPATHLEN+1));
+	err |= __get_user(karg->ca_getfd.gd_version,
+		      &arg->ca32_getfd.gd32_version);
+
+	return (err) ? -EFAULT : 0;
+}
+
+static int compat_nfs_getfs_trans(struct nfsctl_arg *karg, struct compat_nfsctl_arg __user *arg)
+{
+	int err;
+
+	err = access_ok(VERIFY_READ, &arg->ca32_getfs, sizeof(arg->ca32_getfs));
+	err |= get_user(karg->ca_version, &arg->ca32_version);
+	err |= __copy_from_user(&karg->ca_getfs.gd_addr,
+			  &arg->ca32_getfs.gd32_addr,
+			  (sizeof(struct sockaddr)));
+	err |= __copy_from_user(&karg->ca_getfs.gd_path,
+			  &arg->ca32_getfs.gd32_path,
+			  (NFS_MAXPATHLEN+1));
+	err |= __get_user(karg->ca_getfs.gd_maxlen,
+		      &arg->ca32_getfs.gd32_maxlen);
+
+	return (err) ? -EFAULT : 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;
+		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