Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 919 insertions, 0 deletions

diff --git a/kernel/fs/ncpfs/ioctl.c b/kernel/fs/ncpfs/ioctl.c
new file mode 100644
index 000000000..79b113048
--- /dev/null
+++ b/kernel/fs/ncpfs/ioctl.c
@@ -0,0 +1,919 @@
+/*
+ *  ioctl.c
+ *
+ *  Copyright (C) 1995, 1996 by Volker Lendecke
+ *  Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
+ *  Modified 1998, 1999 Wolfram Pienkoss for NLS
+ *
+ */
+
+#include <linux/capability.h>
+#include <linux/compat.h>
+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/ioctl.h>
+#include <linux/time.h>
+#include <linux/mm.h>
+#include <linux/mount.h>
+#include <linux/slab.h>
+#include <linux/highuid.h>
+#include <linux/vmalloc.h>
+#include <linux/sched.h>
+
+#include <asm/uaccess.h>
+
+#include "ncp_fs.h"
+
+/* maximum limit for ncp_objectname_ioctl */
+#define NCP_OBJECT_NAME_MAX_LEN	4096
+/* maximum limit for ncp_privatedata_ioctl */
+#define NCP_PRIVATE_DATA_MAX_LEN 8192
+/* maximum negotiable packet size */
+#define NCP_PACKET_SIZE_INTERNAL 65536
+
+static int
+ncp_get_fs_info(struct ncp_server * server, struct inode *inode,
+		struct ncp_fs_info __user *arg)
+{
+	struct ncp_fs_info info;
+
+	if (copy_from_user(&info, arg, sizeof(info)))
+		return -EFAULT;
+
+	if (info.version != NCP_GET_FS_INFO_VERSION) {
+		ncp_dbg(1, "info.version invalid: %d\n", info.version);
+		return -EINVAL;
+	}
+	/* TODO: info.addr = server->m.serv_addr; */
+	SET_UID(info.mounted_uid, from_kuid_munged(current_user_ns(), server->m.mounted_uid));
+	info.connection		= server->connection;
+	info.buffer_size	= server->buffer_size;
+	info.volume_number	= NCP_FINFO(inode)->volNumber;
+	info.directory_id	= NCP_FINFO(inode)->DosDirNum;
+
+	if (copy_to_user(arg, &info, sizeof(info)))
+		return -EFAULT;
+	return 0;
+}
+
+static int
+ncp_get_fs_info_v2(struct ncp_server * server, struct inode *inode,
+		   struct ncp_fs_info_v2 __user * arg)
+{
+	struct ncp_fs_info_v2 info2;
+
+	if (copy_from_user(&info2, arg, sizeof(info2)))
+		return -EFAULT;
+
+	if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
+		ncp_dbg(1, "info.version invalid: %d\n", info2.version);
+		return -EINVAL;
+	}
+	info2.mounted_uid   = from_kuid_munged(current_user_ns(), server->m.mounted_uid);
+	info2.connection    = server->connection;
+	info2.buffer_size   = server->buffer_size;
+	info2.volume_number = NCP_FINFO(inode)->volNumber;
+	info2.directory_id  = NCP_FINFO(inode)->DosDirNum;
+	info2.dummy1 = info2.dummy2 = info2.dummy3 = 0;
+
+	if (copy_to_user(arg, &info2, sizeof(info2)))
+		return -EFAULT;
+	return 0;
+}
+
+#ifdef CONFIG_COMPAT
+struct compat_ncp_objectname_ioctl
+{
+	s32		auth_type;
+	u32		object_name_len;
+	compat_caddr_t	object_name;	/* a userspace data, in most cases user name */
+};
+
+struct compat_ncp_fs_info_v2 {
+	s32 version;
+	u32 mounted_uid;
+	u32 connection;
+	u32 buffer_size;
+
+	u32 volume_number;
+	u32 directory_id;
+
+	u32 dummy1;
+	u32 dummy2;
+	u32 dummy3;
+};
+
+struct compat_ncp_ioctl_request {
+	u32 function;
+	u32 size;
+	compat_caddr_t data;
+};
+
+struct compat_ncp_privatedata_ioctl
+{
+	u32		len;
+	compat_caddr_t	data;		/* ~1000 for NDS */
+};
+
+#define NCP_IOC_GET_FS_INFO_V2_32	_IOWR('n', 4, struct compat_ncp_fs_info_v2)
+#define NCP_IOC_NCPREQUEST_32		_IOR('n', 1, struct compat_ncp_ioctl_request)
+#define NCP_IOC_GETOBJECTNAME_32	_IOWR('n', 9, struct compat_ncp_objectname_ioctl)
+#define NCP_IOC_SETOBJECTNAME_32	_IOR('n', 9, struct compat_ncp_objectname_ioctl)
+#define NCP_IOC_GETPRIVATEDATA_32	_IOWR('n', 10, struct compat_ncp_privatedata_ioctl)
+#define NCP_IOC_SETPRIVATEDATA_32	_IOR('n', 10, struct compat_ncp_privatedata_ioctl)
+
+static int
+ncp_get_compat_fs_info_v2(struct ncp_server * server, struct inode *inode,
+		   struct compat_ncp_fs_info_v2 __user * arg)
+{
+	struct compat_ncp_fs_info_v2 info2;
+
+	if (copy_from_user(&info2, arg, sizeof(info2)))
+		return -EFAULT;
+
+	if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
+		ncp_dbg(1, "info.version invalid: %d\n", info2.version);
+		return -EINVAL;
+	}
+	info2.mounted_uid   = from_kuid_munged(current_user_ns(), server->m.mounted_uid);
+	info2.connection    = server->connection;
+	info2.buffer_size   = server->buffer_size;
+	info2.volume_number = NCP_FINFO(inode)->volNumber;
+	info2.directory_id  = NCP_FINFO(inode)->DosDirNum;
+	info2.dummy1 = info2.dummy2 = info2.dummy3 = 0;
+
+	if (copy_to_user(arg, &info2, sizeof(info2)))
+		return -EFAULT;
+	return 0;
+}
+#endif
+
+#define NCP_IOC_GETMOUNTUID16		_IOW('n', 2, u16)
+#define NCP_IOC_GETMOUNTUID32		_IOW('n', 2, u32)
+#define NCP_IOC_GETMOUNTUID64		_IOW('n', 2, u64)
+
+#ifdef CONFIG_NCPFS_NLS
+/* Here we are select the iocharset and the codepage for NLS.
+ * Thanks Petr Vandrovec for idea and many hints.
+ */
+static int
+ncp_set_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
+{
+	struct ncp_nls_ioctl user;
+	struct nls_table *codepage;
+	struct nls_table *iocharset;
+	struct nls_table *oldset_io;
+	struct nls_table *oldset_cp;
+	int utf8;
+	int err;
+
+	if (copy_from_user(&user, arg, sizeof(user)))
+		return -EFAULT;
+
+	codepage = NULL;
+	user.codepage[NCP_IOCSNAME_LEN] = 0;
+	if (!user.codepage[0] || !strcmp(user.codepage, "default"))
+		codepage = load_nls_default();
+	else {
+		codepage = load_nls(user.codepage);
+		if (!codepage) {
+			return -EBADRQC;
+		}
+	}
+
+	iocharset = NULL;
+	user.iocharset[NCP_IOCSNAME_LEN] = 0;
+	if (!user.iocharset[0] || !strcmp(user.iocharset, "default")) {
+		iocharset = load_nls_default();
+		utf8 = 0;
+	} else if (!strcmp(user.iocharset, "utf8")) {
+		iocharset = load_nls_default();
+		utf8 = 1;
+	} else {
+		iocharset = load_nls(user.iocharset);
+		if (!iocharset) {
+			unload_nls(codepage);
+			return -EBADRQC;
+		}
+		utf8 = 0;
+	}
+
+	mutex_lock(&server->root_setup_lock);
+	if (server->root_setuped) {
+		oldset_cp = codepage;
+		oldset_io = iocharset;
+		err = -EBUSY;
+	} else {
+		if (utf8)
+			NCP_SET_FLAG(server, NCP_FLAG_UTF8);
+		else
+			NCP_CLR_FLAG(server, NCP_FLAG_UTF8);
+		oldset_cp = server->nls_vol;
+		server->nls_vol = codepage;
+		oldset_io = server->nls_io;
+		server->nls_io = iocharset;
+		err = 0;
+	}
+	mutex_unlock(&server->root_setup_lock);
+	unload_nls(oldset_cp);
+	unload_nls(oldset_io);
+
+	return err;
+}
+
+static int
+ncp_get_charsets(struct ncp_server* server, struct ncp_nls_ioctl __user *arg)
+{
+	struct ncp_nls_ioctl user;
+	int len;
+
+	memset(&user, 0, sizeof(user));
+	mutex_lock(&server->root_setup_lock);
+	if (server->nls_vol && server->nls_vol->charset) {
+		len = strlen(server->nls_vol->charset);
+		if (len > NCP_IOCSNAME_LEN)
+			len = NCP_IOCSNAME_LEN;
+		strncpy(user.codepage, server->nls_vol->charset, len);
+		user.codepage[len] = 0;
+	}
+
+	if (NCP_IS_FLAG(server, NCP_FLAG_UTF8))
+		strcpy(user.iocharset, "utf8");
+	else if (server->nls_io && server->nls_io->charset) {
+		len = strlen(server->nls_io->charset);
+		if (len > NCP_IOCSNAME_LEN)
+			len = NCP_IOCSNAME_LEN;
+		strncpy(user.iocharset,	server->nls_io->charset, len);
+		user.iocharset[len] = 0;
+	}
+	mutex_unlock(&server->root_setup_lock);
+
+	if (copy_to_user(arg, &user, sizeof(user)))
+		return -EFAULT;
+	return 0;
+}
+#endif /* CONFIG_NCPFS_NLS */
+
+static long __ncp_ioctl(struct inode *inode, unsigned int cmd, unsigned long arg)
+{
+	struct ncp_server *server = NCP_SERVER(inode);
+	int result;
+	struct ncp_ioctl_request request;
+	char* bouncebuffer;
+	void __user *argp = (void __user *)arg;
+
+	switch (cmd) {
+#ifdef CONFIG_COMPAT
+	case NCP_IOC_NCPREQUEST_32:
+#endif
+	case NCP_IOC_NCPREQUEST:
+#ifdef CONFIG_COMPAT
+		if (cmd == NCP_IOC_NCPREQUEST_32) {
+			struct compat_ncp_ioctl_request request32;
+			if (copy_from_user(&request32, argp, sizeof(request32)))
+				return -EFAULT;
+			request.function = request32.function;
+			request.size = request32.size;
+			request.data = compat_ptr(request32.data);
+		} else
+#endif
+		if (copy_from_user(&request, argp, sizeof(request)))
+			return -EFAULT;
+
+		if ((request.function > 255)
+		    || (request.size >
+		  NCP_PACKET_SIZE - sizeof(struct ncp_request_header))) {
+			return -EINVAL;
+		}
+		bouncebuffer = vmalloc(NCP_PACKET_SIZE_INTERNAL);
+		if (!bouncebuffer)
+			return -ENOMEM;
+		if (copy_from_user(bouncebuffer, request.data, request.size)) {
+			vfree(bouncebuffer);
+			return -EFAULT;
+		}
+		ncp_lock_server(server);
+
+		/* FIXME: We hack around in the server's structures
+		   here to be able to use ncp_request */
+
+		server->has_subfunction = 0;
+		server->current_size = request.size;
+		memcpy(server->packet, bouncebuffer, request.size);
+
+		result = ncp_request2(server, request.function,
+			bouncebuffer, NCP_PACKET_SIZE_INTERNAL);
+		if (result < 0)
+			result = -EIO;
+		else
+			result = server->reply_size;
+		ncp_unlock_server(server);
+		ncp_dbg(1, "copy %d bytes\n", result);
+		if (result >= 0)
+			if (copy_to_user(request.data, bouncebuffer, result))
+				result = -EFAULT;
+		vfree(bouncebuffer);
+		return result;
+
+	case NCP_IOC_CONN_LOGGED_IN:
+
+		if (!(server->m.int_flags & NCP_IMOUNT_LOGGEDIN_POSSIBLE))
+			return -EINVAL;
+		mutex_lock(&server->root_setup_lock);
+		if (server->root_setuped)
+			result = -EBUSY;
+		else {
+			result = ncp_conn_logged_in(inode->i_sb);
+			if (result == 0)
+				server->root_setuped = 1;
+		}
+		mutex_unlock(&server->root_setup_lock);
+		return result;
+
+	case NCP_IOC_GET_FS_INFO:
+		return ncp_get_fs_info(server, inode, argp);
+
+	case NCP_IOC_GET_FS_INFO_V2:
+		return ncp_get_fs_info_v2(server, inode, argp);
+
+#ifdef CONFIG_COMPAT
+	case NCP_IOC_GET_FS_INFO_V2_32:
+		return ncp_get_compat_fs_info_v2(server, inode, argp);
+#endif
+	/* we have too many combinations of CONFIG_COMPAT,
+	 * CONFIG_64BIT and CONFIG_UID16, so just handle
+	 * any of the possible ioctls */
+	case NCP_IOC_GETMOUNTUID16:
+		{
+			u16 uid;
+
+			SET_UID(uid, from_kuid_munged(current_user_ns(), server->m.mounted_uid));
+			if (put_user(uid, (u16 __user *)argp))
+				return -EFAULT;
+			return 0;
+		}
+	case NCP_IOC_GETMOUNTUID32:
+	{
+		uid_t uid = from_kuid_munged(current_user_ns(), server->m.mounted_uid);
+		if (put_user(uid, (u32 __user *)argp))
+			return -EFAULT;
+		return 0;
+	}
+	case NCP_IOC_GETMOUNTUID64:
+	{
+		uid_t uid = from_kuid_munged(current_user_ns(), server->m.mounted_uid);
+		if (put_user(uid, (u64 __user *)argp))
+			return -EFAULT;
+		return 0;
+	}
+	case NCP_IOC_GETROOT:
+		{
+			struct ncp_setroot_ioctl sr;
+
+			result = -EACCES;
+			mutex_lock(&server->root_setup_lock);
+			if (server->m.mounted_vol[0]) {
+				struct dentry* dentry = inode->i_sb->s_root;
+
+				if (dentry) {
+					struct inode* s_inode = d_inode(dentry);
+
+					if (s_inode) {
+						sr.volNumber = NCP_FINFO(s_inode)->volNumber;
+						sr.dirEntNum = NCP_FINFO(s_inode)->dirEntNum;
+						sr.namespace = server->name_space[sr.volNumber];
+						result = 0;
+					} else
+						ncp_dbg(1, "d_inode(s_root)==NULL\n");
+				} else
+					ncp_dbg(1, "s_root==NULL\n");
+			} else {
+				sr.volNumber = -1;
+				sr.namespace = 0;
+				sr.dirEntNum = 0;
+				result = 0;
+			}
+			mutex_unlock(&server->root_setup_lock);
+			if (!result && copy_to_user(argp, &sr, sizeof(sr)))
+				result = -EFAULT;
+			return result;
+		}
+
+	case NCP_IOC_SETROOT:
+		{
+			struct ncp_setroot_ioctl sr;
+			__u32 vnum;
+			__le32 de;
+			__le32 dosde;
+			struct dentry* dentry;
+
+			if (copy_from_user(&sr, argp, sizeof(sr)))
+				return -EFAULT;
+			mutex_lock(&server->root_setup_lock);
+			if (server->root_setuped)
+				result = -EBUSY;
+			else {
+				if (sr.volNumber < 0) {
+					server->m.mounted_vol[0] = 0;
+					vnum = NCP_NUMBER_OF_VOLUMES;
+					de = 0;
+					dosde = 0;
+					result = 0;
+				} else if (sr.volNumber >= NCP_NUMBER_OF_VOLUMES) {
+					result = -EINVAL;
+				} else if (ncp_mount_subdir(server, sr.volNumber,
+							sr.namespace, sr.dirEntNum,
+							&vnum, &de, &dosde)) {
+					result = -ENOENT;
+				} else
+					result = 0;
+
+				if (result == 0) {
+					dentry = inode->i_sb->s_root;
+					if (dentry) {
+						struct inode* s_inode = d_inode(dentry);
+
+						if (s_inode) {
+							NCP_FINFO(s_inode)->volNumber = vnum;
+							NCP_FINFO(s_inode)->dirEntNum = de;
+							NCP_FINFO(s_inode)->DosDirNum = dosde;
+							server->root_setuped = 1;
+						} else {
+							ncp_dbg(1, "d_inode(s_root)==NULL\n");
+							result = -EIO;
+						}
+					} else {
+						ncp_dbg(1, "s_root==NULL\n");
+						result = -EIO;
+					}
+				}
+			}
+			mutex_unlock(&server->root_setup_lock);
+
+			return result;
+		}
+
+#ifdef CONFIG_NCPFS_PACKET_SIGNING
+	case NCP_IOC_SIGN_INIT:
+		{
+			struct ncp_sign_init sign;
+
+			if (argp)
+				if (copy_from_user(&sign, argp, sizeof(sign)))
+					return -EFAULT;
+			ncp_lock_server(server);
+			mutex_lock(&server->rcv.creq_mutex);
+			if (argp) {
+				if (server->sign_wanted) {
+					memcpy(server->sign_root,sign.sign_root,8);
+					memcpy(server->sign_last,sign.sign_last,16);
+					server->sign_active = 1;
+				}
+				/* ignore when signatures not wanted */
+			} else {
+				server->sign_active = 0;
+			}
+			mutex_unlock(&server->rcv.creq_mutex);
+			ncp_unlock_server(server);
+			return 0;
+		}
+
+        case NCP_IOC_SIGN_WANTED:
+		{
+			int state;
+
+			ncp_lock_server(server);
+			state = server->sign_wanted;
+			ncp_unlock_server(server);
+			if (put_user(state, (int __user *)argp))
+				return -EFAULT;
+			return 0;
+		}
+
+	case NCP_IOC_SET_SIGN_WANTED:
+		{
+			int newstate;
+
+			/* get only low 8 bits... */
+			if (get_user(newstate, (unsigned char __user *)argp))
+				return -EFAULT;
+			result = 0;
+			ncp_lock_server(server);
+			if (server->sign_active) {
+				/* cannot turn signatures OFF when active */
+				if (!newstate)
+					result = -EINVAL;
+			} else {
+				server->sign_wanted = newstate != 0;
+			}
+			ncp_unlock_server(server);
+			return result;
+		}
+
+#endif /* CONFIG_NCPFS_PACKET_SIGNING */
+
+#ifdef CONFIG_NCPFS_IOCTL_LOCKING
+	case NCP_IOC_LOCKUNLOCK:
+		{
+			struct ncp_lock_ioctl	 rqdata;
+
+			if (copy_from_user(&rqdata, argp, sizeof(rqdata)))
+				return -EFAULT;
+			if (rqdata.origin != 0)
+				return -EINVAL;
+			/* check for cmd */
+			switch (rqdata.cmd) {
+				case NCP_LOCK_EX:
+				case NCP_LOCK_SH:
+						if (rqdata.timeout == 0)
+							rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT;
+						else if (rqdata.timeout > NCP_LOCK_MAX_TIMEOUT)
+							rqdata.timeout = NCP_LOCK_MAX_TIMEOUT;
+						break;
+				case NCP_LOCK_LOG:
+						rqdata.timeout = NCP_LOCK_DEFAULT_TIMEOUT;	/* has no effect */
+				case NCP_LOCK_CLEAR:
+						break;
+				default:
+						return -EINVAL;
+			}
+			/* locking needs both read and write access */
+			if ((result = ncp_make_open(inode, O_RDWR)) != 0)
+			{
+				return result;
+			}
+			result = -EISDIR;
+			if (!S_ISREG(inode->i_mode))
+				goto outrel;
+			if (rqdata.cmd == NCP_LOCK_CLEAR)
+			{
+				result = ncp_ClearPhysicalRecord(NCP_SERVER(inode),
+							NCP_FINFO(inode)->file_handle,
+							rqdata.offset,
+							rqdata.length);
+				if (result > 0) result = 0;	/* no such lock */
+			}
+			else
+			{
+				int lockcmd;
+
+				switch (rqdata.cmd)
+				{
+					case NCP_LOCK_EX:  lockcmd=1; break;
+					case NCP_LOCK_SH:  lockcmd=3; break;
+					default:	   lockcmd=0; break;
+				}
+				result = ncp_LogPhysicalRecord(NCP_SERVER(inode),
+							NCP_FINFO(inode)->file_handle,
+							lockcmd,
+							rqdata.offset,
+							rqdata.length,
+							rqdata.timeout);
+				if (result > 0) result = -EAGAIN;
+			}
+outrel:
+			ncp_inode_close(inode);
+			return result;
+		}
+#endif	/* CONFIG_NCPFS_IOCTL_LOCKING */
+
+#ifdef CONFIG_COMPAT
+	case NCP_IOC_GETOBJECTNAME_32:
+		{
+			struct compat_ncp_objectname_ioctl user;
+			size_t outl;
+
+			if (copy_from_user(&user, argp, sizeof(user)))
+				return -EFAULT;
+			down_read(&server->auth_rwsem);
+			user.auth_type = server->auth.auth_type;
+			outl = user.object_name_len;
+			user.object_name_len = server->auth.object_name_len;
+			if (outl > user.object_name_len)
+				outl = user.object_name_len;
+			result = 0;
+			if (outl) {
+				if (copy_to_user(compat_ptr(user.object_name),
+						 server->auth.object_name,
+						 outl))
+					result = -EFAULT;
+			}
+			up_read(&server->auth_rwsem);
+			if (!result && copy_to_user(argp, &user, sizeof(user)))
+				result = -EFAULT;
+			return result;
+		}
+#endif
+
+	case NCP_IOC_GETOBJECTNAME:
+		{
+			struct ncp_objectname_ioctl user;
+			size_t outl;
+
+			if (copy_from_user(&user, argp, sizeof(user)))
+				return -EFAULT;
+			down_read(&server->auth_rwsem);
+			user.auth_type = server->auth.auth_type;
+			outl = user.object_name_len;
+			user.object_name_len = server->auth.object_name_len;
+			if (outl > user.object_name_len)
+				outl = user.object_name_len;
+			result = 0;
+			if (outl) {
+				if (copy_to_user(user.object_name,
+						 server->auth.object_name,
+						 outl))
+					result = -EFAULT;
+			}
+			up_read(&server->auth_rwsem);
+			if (!result && copy_to_user(argp, &user, sizeof(user)))
+				result = -EFAULT;
+			return result;
+		}
+
+#ifdef CONFIG_COMPAT
+	case NCP_IOC_SETOBJECTNAME_32:
+#endif
+	case NCP_IOC_SETOBJECTNAME:
+		{
+			struct ncp_objectname_ioctl user;
+			void* newname;
+			void* oldname;
+			size_t oldnamelen;
+			void* oldprivate;
+			size_t oldprivatelen;
+
+#ifdef CONFIG_COMPAT
+			if (cmd == NCP_IOC_SETOBJECTNAME_32) {
+				struct compat_ncp_objectname_ioctl user32;
+				if (copy_from_user(&user32, argp, sizeof(user32)))
+					return -EFAULT;
+				user.auth_type = user32.auth_type;
+				user.object_name_len = user32.object_name_len;
+				user.object_name = compat_ptr(user32.object_name);
+			} else
+#endif
+			if (copy_from_user(&user, argp, sizeof(user)))
+				return -EFAULT;
+
+			if (user.object_name_len > NCP_OBJECT_NAME_MAX_LEN)
+				return -ENOMEM;
+			if (user.object_name_len) {
+				newname = memdup_user(user.object_name,
+						      user.object_name_len);
+				if (IS_ERR(newname))
+					return PTR_ERR(newname);
+			} else {
+				newname = NULL;
+			}
+			down_write(&server->auth_rwsem);
+			oldname = server->auth.object_name;
+			oldnamelen = server->auth.object_name_len;
+			oldprivate = server->priv.data;
+			oldprivatelen = server->priv.len;
+			server->auth.auth_type = user.auth_type;
+			server->auth.object_name_len = user.object_name_len;
+			server->auth.object_name = newname;
+			server->priv.len = 0;
+			server->priv.data = NULL;
+			up_write(&server->auth_rwsem);
+			kfree(oldprivate);
+			kfree(oldname);
+			return 0;
+		}
+
+#ifdef CONFIG_COMPAT
+	case NCP_IOC_GETPRIVATEDATA_32:
+#endif
+	case NCP_IOC_GETPRIVATEDATA:
+		{
+			struct ncp_privatedata_ioctl user;
+			size_t outl;
+
+#ifdef CONFIG_COMPAT
+			if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
+				struct compat_ncp_privatedata_ioctl user32;
+				if (copy_from_user(&user32, argp, sizeof(user32)))
+					return -EFAULT;
+				user.len = user32.len;
+				user.data = compat_ptr(user32.data);
+			} else
+#endif
+			if (copy_from_user(&user, argp, sizeof(user)))
+				return -EFAULT;
+
+			down_read(&server->auth_rwsem);
+			outl = user.len;
+			user.len = server->priv.len;
+			if (outl > user.len) outl = user.len;
+			result = 0;
+			if (outl) {
+				if (copy_to_user(user.data,
+						 server->priv.data,
+						 outl))
+					result = -EFAULT;
+			}
+			up_read(&server->auth_rwsem);
+			if (result)
+				return result;
+#ifdef CONFIG_COMPAT
+			if (cmd == NCP_IOC_GETPRIVATEDATA_32) {
+				struct compat_ncp_privatedata_ioctl user32;
+				user32.len = user.len;
+				user32.data = (unsigned long) user.data;
+				if (copy_to_user(argp, &user32, sizeof(user32)))
+					return -EFAULT;
+			} else
+#endif
+			if (copy_to_user(argp, &user, sizeof(user)))
+				return -EFAULT;
+
+			return 0;
+		}
+
+#ifdef CONFIG_COMPAT
+	case NCP_IOC_SETPRIVATEDATA_32:
+#endif
+	case NCP_IOC_SETPRIVATEDATA:
+		{
+			struct ncp_privatedata_ioctl user;
+			void* new;
+			void* old;
+			size_t oldlen;
+
+#ifdef CONFIG_COMPAT
+			if (cmd == NCP_IOC_SETPRIVATEDATA_32) {
+				struct compat_ncp_privatedata_ioctl user32;
+				if (copy_from_user(&user32, argp, sizeof(user32)))
+					return -EFAULT;
+				user.len = user32.len;
+				user.data = compat_ptr(user32.data);
+			} else
+#endif
+			if (copy_from_user(&user, argp, sizeof(user)))
+				return -EFAULT;
+
+			if (user.len > NCP_PRIVATE_DATA_MAX_LEN)
+				return -ENOMEM;
+			if (user.len) {
+				new = memdup_user(user.data, user.len);
+				if (IS_ERR(new))
+					return PTR_ERR(new);
+			} else {
+				new = NULL;
+			}
+			down_write(&server->auth_rwsem);
+			old = server->priv.data;
+			oldlen = server->priv.len;
+			server->priv.len = user.len;
+			server->priv.data = new;
+			up_write(&server->auth_rwsem);
+			kfree(old);
+			return 0;
+		}
+
+#ifdef CONFIG_NCPFS_NLS
+	case NCP_IOC_SETCHARSETS:
+		return ncp_set_charsets(server, argp);
+
+	case NCP_IOC_GETCHARSETS:
+		return ncp_get_charsets(server, argp);
+
+#endif /* CONFIG_NCPFS_NLS */
+
+	case NCP_IOC_SETDENTRYTTL:
+		{
+			u_int32_t user;
+
+			if (copy_from_user(&user, argp, sizeof(user)))
+				return -EFAULT;
+			/* 20 secs at most... */
+			if (user > 20000)
+				return -EINVAL;
+			user = (user * HZ) / 1000;
+			atomic_set(&server->dentry_ttl, user);
+			return 0;
+		}
+
+	case NCP_IOC_GETDENTRYTTL:
+		{
+			u_int32_t user = (atomic_read(&server->dentry_ttl) * 1000) / HZ;
+			if (copy_to_user(argp, &user, sizeof(user)))
+				return -EFAULT;
+			return 0;
+		}
+
+	}
+	return -EINVAL;
+}
+
+long ncp_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct ncp_server *server = NCP_SERVER(inode);
+	kuid_t uid = current_uid();
+	int need_drop_write = 0;
+	long ret;
+
+	switch (cmd) {
+	case NCP_IOC_SETCHARSETS:
+	case NCP_IOC_CONN_LOGGED_IN:
+	case NCP_IOC_SETROOT:
+		if (!capable(CAP_SYS_ADMIN)) {
+			ret = -EPERM;
+			goto out;
+		}
+		break;
+	}
+	if (!uid_eq(server->m.mounted_uid, uid)) {
+		switch (cmd) {
+		/*
+		 * Only mount owner can issue these ioctls.  Information
+		 * necessary to authenticate to other NDS servers are
+		 * stored here.
+		 */
+		case NCP_IOC_GETOBJECTNAME:
+		case NCP_IOC_SETOBJECTNAME:
+		case NCP_IOC_GETPRIVATEDATA:
+		case NCP_IOC_SETPRIVATEDATA:
+#ifdef CONFIG_COMPAT
+		case NCP_IOC_GETOBJECTNAME_32:
+		case NCP_IOC_SETOBJECTNAME_32:
+		case NCP_IOC_GETPRIVATEDATA_32:
+		case NCP_IOC_SETPRIVATEDATA_32:
+#endif
+			ret = -EACCES;
+			goto out;
+		/*
+		 * These require write access on the inode if user id
+		 * does not match.  Note that they do not write to the
+		 * file...  But old code did mnt_want_write, so I keep
+		 * it as is.  Of course not for mountpoint owner, as
+		 * that breaks read-only mounts altogether as ncpmount
+		 * needs working NCP_IOC_NCPREQUEST and
+		 * NCP_IOC_GET_FS_INFO.  Some of these codes (setdentryttl,
+		 * signinit, setsignwanted) should be probably restricted
+		 * to owner only, or even more to CAP_SYS_ADMIN).
+		 */
+		case NCP_IOC_GET_FS_INFO:
+		case NCP_IOC_GET_FS_INFO_V2:
+		case NCP_IOC_NCPREQUEST:
+		case NCP_IOC_SETDENTRYTTL:
+		case NCP_IOC_SIGN_INIT:
+		case NCP_IOC_LOCKUNLOCK:
+		case NCP_IOC_SET_SIGN_WANTED:
+#ifdef CONFIG_COMPAT
+		case NCP_IOC_GET_FS_INFO_V2_32:
+		case NCP_IOC_NCPREQUEST_32:
+#endif
+			ret = mnt_want_write_file(filp);
+			if (ret)
+				goto out;
+			need_drop_write = 1;
+			ret = inode_permission(inode, MAY_WRITE);
+			if (ret)
+				goto outDropWrite;
+			break;
+		/*
+		 * Read access required.
+		 */
+		case NCP_IOC_GETMOUNTUID16:
+		case NCP_IOC_GETMOUNTUID32:
+		case NCP_IOC_GETMOUNTUID64:
+		case NCP_IOC_GETROOT:
+		case NCP_IOC_SIGN_WANTED:
+			ret = inode_permission(inode, MAY_READ);
+			if (ret)
+				goto out;
+			break;
+		/*
+		 * Anybody can read these.
+		 */
+		case NCP_IOC_GETCHARSETS:
+		case NCP_IOC_GETDENTRYTTL:
+		default:
+		/* Three codes below are protected by CAP_SYS_ADMIN above. */
+		case NCP_IOC_SETCHARSETS:
+		case NCP_IOC_CONN_LOGGED_IN:
+		case NCP_IOC_SETROOT:
+			break;
+		}
+	}
+	ret = __ncp_ioctl(inode, cmd, arg);
+outDropWrite:
+	if (need_drop_write)
+		mnt_drop_write_file(filp);
+out:
+	return ret;
+}
+
+#ifdef CONFIG_COMPAT
+long ncp_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	long ret;
+
+	arg = (unsigned long) compat_ptr(arg);
+	ret = ncp_ioctl(file, cmd, arg);
+	return ret;
+}
+#endif