fs/ncpfs/ioctl.c - kernel/msm-4.9 - Gitiles

 /*
  *  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/highuid.h>
 #include <linux/smp_lock.h>
 #include <linux/vmalloc.h>

 #include <linux/ncp_fs.h>

 #include <asm/uaccess.h>

 #include "ncplib_kernel.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 file *file,
 		struct ncp_fs_info __user *arg)
 {
 	struct inode *inode = file->f_dentry->d_inode;
 	struct ncp_fs_info info;

 	if ((file_permission(file, MAY_WRITE) != 0)
 	    && (current->uid != server->m.mounted_uid)) {
 		return -EACCES;
 	}
 	if (copy_from_user(&info, arg, sizeof(info)))
 		return -EFAULT;

 	if (info.version != NCP_GET_FS_INFO_VERSION) {
 		DPRINTK("info.version invalid: %d\n", info.version);
 		return -EINVAL;
 	}
 	/* TODO: info.addr = server->m.serv_addr; */
 	SET_UID(info.mounted_uid, 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 file *file,
 		   struct ncp_fs_info_v2 __user * arg)
 {
 	struct inode *inode = file->f_dentry->d_inode;
 	struct ncp_fs_info_v2 info2;

 	if ((file_permission(file, MAY_WRITE) != 0)
 	    && (current->uid != server->m.mounted_uid)) {
 		return -EACCES;
 	}
 	if (copy_from_user(&info2, arg, sizeof(info2)))
 		return -EFAULT;

 	if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
 		DPRINTK("info.version invalid: %d\n", info2.version);
 		return -EINVAL;
 	}
 	info2.mounted_uid   = 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;	/* an 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 file *file,
 		   struct compat_ncp_fs_info_v2 __user * arg)
 {
 	struct inode *inode = file->f_dentry->d_inode;
 	struct compat_ncp_fs_info_v2 info2;

 	if ((file_permission(file, MAY_WRITE) != 0)
 	    && (current->uid != server->m.mounted_uid)) {
 		return -EACCES;
 	}
 	if (copy_from_user(&info2, arg, sizeof(info2)))
 		return -EFAULT;

 	if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
 		DPRINTK("info.version invalid: %d\n", info2.version);
 		return -EINVAL;
 	}
 	info2.mounted_uid   = 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;

 	if (!capable(CAP_SYS_ADMIN))
 		return -EACCES;
 	if (server->root_setuped)
 		return -EBUSY;

 	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();
 		NCP_CLR_FLAG(server, NCP_FLAG_UTF8);
 	} else if (!strcmp(user.iocharset, "utf8")) {
 		iocharset = load_nls_default();
 		NCP_SET_FLAG(server, NCP_FLAG_UTF8);
 	} else {
 		iocharset = load_nls(user.iocharset);
 		if (!iocharset) {
 			unload_nls(codepage);
 			return -EBADRQC;
 		}
 		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;

 	if (oldset_cp)
 		unload_nls(oldset_cp);
 	if (oldset_io)
 		unload_nls(oldset_io);

 	return 0;
 }

 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));
 	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;
 	}

 	if (copy_to_user(arg, &user, sizeof(user)))
 		return -EFAULT;
 	return 0;
 }
 #endif /* CONFIG_NCPFS_NLS */

 int ncp_ioctl(struct inode *inode, struct file *filp,
 	      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:
 		if ((file_permission(filp, MAY_WRITE) != 0)
 		    && (current->uid != server->m.mounted_uid)) {
 			return -EACCES;
 		}
 #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);
 		DPRINTK("ncp_ioctl: 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 (!capable(CAP_SYS_ADMIN))
 			return -EACCES;
 		if (!(server->m.int_flags & NCP_IMOUNT_LOGGEDIN_POSSIBLE))
 			return -EINVAL;
 		if (server->root_setuped)
 			return -EBUSY;
 		server->root_setuped = 1;
 		return ncp_conn_logged_in(inode->i_sb);

 	case NCP_IOC_GET_FS_INFO:
 		return ncp_get_fs_info(server, filp, argp);

 	case NCP_IOC_GET_FS_INFO_V2:
 		return ncp_get_fs_info_v2(server, filp, argp);

 #ifdef CONFIG_COMPAT
 	case NCP_IOC_GET_FS_INFO_V2_32:
 		return ncp_get_compat_fs_info_v2(server, filp, 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:
 	case NCP_IOC_GETMOUNTUID32:
 	case NCP_IOC_GETMOUNTUID64:
 		if ((file_permission(filp, MAY_READ) != 0)
 			&& (current->uid != server->m.mounted_uid)) {
 			return -EACCES;
 		}
 		if (cmd == NCP_IOC_GETMOUNTUID16) {
 			u16 uid;
 			SET_UID(uid, server->m.mounted_uid);
 			if (put_user(uid, (u16 __user *)argp))
 				return -EFAULT;
 		} else if (cmd == NCP_IOC_GETMOUNTUID32) {
 			if (put_user(server->m.mounted_uid,
 						(u32 __user *)argp))
 				return -EFAULT;
 		} else {
 			if (put_user(server->m.mounted_uid,
 						(u64 __user *)argp))
 				return -EFAULT;
 		}
 		return 0;

 	case NCP_IOC_GETROOT:
 		{
 			struct ncp_setroot_ioctl sr;

 			if ((file_permission(filp, MAY_READ) != 0)
 			    && (current->uid != server->m.mounted_uid))
 			{
 				return -EACCES;
 			}
 			if (server->m.mounted_vol[0]) {
 				struct dentry* dentry = inode->i_sb->s_root;

 				if (dentry) {
 					struct inode* inode = dentry->d_inode;

 					if (inode) {
 						sr.volNumber = NCP_FINFO(inode)->volNumber;
 						sr.dirEntNum = NCP_FINFO(inode)->dirEntNum;
 						sr.namespace = server->name_space[sr.volNumber];
 					} else
 						DPRINTK("ncpfs: s_root->d_inode==NULL\n");
 				} else
 					DPRINTK("ncpfs: s_root==NULL\n");
 			} else {
 				sr.volNumber = -1;
 				sr.namespace = 0;
 				sr.dirEntNum = 0;
 			}
 			if (copy_to_user(argp, &sr, sizeof(sr)))
 				return -EFAULT;
 			return 0;
 		}
 	case NCP_IOC_SETROOT:
 		{
 			struct ncp_setroot_ioctl sr;
 			__u32 vnum;
 			__le32 de;
 			__le32 dosde;
 			struct dentry* dentry;

 			if (!capable(CAP_SYS_ADMIN))
 			{
 				return -EACCES;
 			}
 			if (server->root_setuped) return -EBUSY;
 			if (copy_from_user(&sr, argp, sizeof(sr)))
 				return -EFAULT;
 			if (sr.volNumber < 0) {
 				server->m.mounted_vol[0] = 0;
 				vnum = NCP_NUMBER_OF_VOLUMES;
 				de = 0;
 				dosde = 0;
 			} else if (sr.volNumber >= NCP_NUMBER_OF_VOLUMES) {
 				return -EINVAL;
 			} else if (ncp_mount_subdir(server, sr.volNumber,
 						sr.namespace, sr.dirEntNum,
 						&vnum, &de, &dosde)) {
 				return -ENOENT;
 			}

 			dentry = inode->i_sb->s_root;
 			server->root_setuped = 1;
 			if (dentry) {
 				struct inode* inode = dentry->d_inode;

 				if (inode) {
 					NCP_FINFO(inode)->volNumber = vnum;
 					NCP_FINFO(inode)->dirEntNum = de;
 					NCP_FINFO(inode)->DosDirNum = dosde;
 				} else
 					DPRINTK("ncpfs: s_root->d_inode==NULL\n");
 			} else
 				DPRINTK("ncpfs: s_root==NULL\n");

 			return 0;
 		}

 #ifdef CONFIG_NCPFS_PACKET_SIGNING
 	case NCP_IOC_SIGN_INIT:
 		if ((file_permission(filp, MAY_WRITE) != 0)
 		    && (current->uid != server->m.mounted_uid))
 		{
 			return -EACCES;
 		}
 		if (argp) {
 			if (server->sign_wanted)
 			{
 				struct ncp_sign_init sign;

 				if (copy_from_user(&sign, argp, sizeof(sign)))
 					return -EFAULT;
 				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;
 		}
 		return 0;

         case NCP_IOC_SIGN_WANTED:
 		if ((file_permission(filp, MAY_READ) != 0)
 		    && (current->uid != server->m.mounted_uid))
 		{
 			return -EACCES;
 		}

                 if (put_user(server->sign_wanted, (int __user *)argp))
 			return -EFAULT;
                 return 0;
 	case NCP_IOC_SET_SIGN_WANTED:
 		{
 			int newstate;

 			if ((file_permission(filp, MAY_WRITE) != 0)
 			    && (current->uid != server->m.mounted_uid))
 			{
 				return -EACCES;
 			}
 			/* get only low 8 bits... */
 			if (get_user(newstate, (unsigned char __user *)argp))
 				return -EFAULT;
 			if (server->sign_active) {
 				/* cannot turn signatures OFF when active */
 				if (!newstate) return -EINVAL;
 			} else {
 				server->sign_wanted = newstate != 0;
 			}
 			return 0;
 		}

 #endif /* CONFIG_NCPFS_PACKET_SIGNING */

 #ifdef CONFIG_NCPFS_IOCTL_LOCKING
 	case NCP_IOC_LOCKUNLOCK:
 		if ((file_permission(filp, MAY_WRITE) != 0)
 		    && (current->uid != server->m.mounted_uid))
 		{
 			return -EACCES;
 		}
 		{
 			struct ncp_lock_ioctl	 rqdata;
 			int result;

 			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 = -EIO;
 			if (!ncp_conn_valid(server))
 				goto outrel;
 			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:
 		if (current->uid != server->m.mounted_uid) {
 			return -EACCES;
 		}
 		{
 			struct compat_ncp_objectname_ioctl user;
 			size_t outl;

 			if (copy_from_user(&user, argp, sizeof(user)))
 				return -EFAULT;
 			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;
 			if (outl) {
 				if (copy_to_user(compat_ptr(user.object_name),
 						 server->auth.object_name,
 						 outl)) return -EFAULT;
 			}
 			if (copy_to_user(argp, &user, sizeof(user)))
 				return -EFAULT;
 			return 0;
 		}
 #endif
 	case NCP_IOC_GETOBJECTNAME:
 		if (current->uid != server->m.mounted_uid) {
 			return -EACCES;
 		}
 		{
 			struct ncp_objectname_ioctl user;
 			size_t outl;

 			if (copy_from_user(&user, argp, sizeof(user)))
 				return -EFAULT;
 			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;
 			if (outl) {
 				if (copy_to_user(user.object_name,
 						 server->auth.object_name,
 						 outl)) return -EFAULT;
 			}
 			if (copy_to_user(argp, &user, sizeof(user)))
 				return -EFAULT;
 			return 0;
 		}
 #ifdef CONFIG_COMPAT
 	case NCP_IOC_SETOBJECTNAME_32:
 #endif
 	case NCP_IOC_SETOBJECTNAME:
 		if (current->uid != server->m.mounted_uid) {
 			return -EACCES;
 		}
 		{
 			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 = kmalloc(user.object_name_len, GFP_USER);
 				if (!newname)
 					return -ENOMEM;
 				if (copy_from_user(newname, user.object_name, user.object_name_len)) {
 					kfree(newname);
 					return -EFAULT;
 				}
 			} else {
 				newname = NULL;
 			}
 			/* enter critical section */
 			/* maybe that kfree can sleep so do that this way */
 			/* it is at least more SMP friendly (in future...) */
 			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;
 			/* leave critical section */
 			kfree(oldprivate);
 			kfree(oldname);
 			return 0;
 		}
 #ifdef CONFIG_COMPAT
 	case NCP_IOC_GETPRIVATEDATA_32:
 #endif
 	case NCP_IOC_GETPRIVATEDATA:
 		if (current->uid != server->m.mounted_uid) {
 			return -EACCES;
 		}
 		{
 			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;

 			outl = user.len;
 			user.len = server->priv.len;
 			if (outl > user.len) outl = user.len;
 			if (outl) {
 				if (copy_to_user(user.data,
 						 server->priv.data,
 						 outl)) return -EFAULT;
 			}
 #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:
 		if (current->uid != server->m.mounted_uid) {
 			return -EACCES;
 		}
 		{
 			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 = kmalloc(user.len, GFP_USER);
 				if (!new)
 					return -ENOMEM;
 				if (copy_from_user(new, user.data, user.len)) {
 					kfree(new);
 					return -EFAULT;
 				}
 			} else {
 				new = NULL;
 			}
 			/* enter critical section */
 			old = server->priv.data;
 			oldlen = server->priv.len;
 			server->priv.len = user.len;
 			server->priv.data = new;
 			/* leave critical section */
 			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:
 		if ((file_permission(filp, MAY_WRITE) != 0) &&
 				 (current->uid != server->m.mounted_uid))
 			return -EACCES;
 		{
 			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;
 			server->dentry_ttl = user;
 			return 0;
 		}

 	case NCP_IOC_GETDENTRYTTL:
 		{
 			u_int32_t user = (server->dentry_ttl * 1000) / HZ;
 			if (copy_to_user(argp, &user, sizeof(user)))
 				return -EFAULT;
 			return 0;
 		}

 	}
 	return -EINVAL;
 }

 #ifdef CONFIG_COMPAT
 long ncp_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
 	struct inode *inode = file->f_dentry->d_inode;
 	int ret;

 	lock_kernel();
 	arg = (unsigned long) compat_ptr(arg);
 	ret = ncp_ioctl(inode, file, cmd, arg);
 	unlock_kernel();
 	return ret;
 }
 #endif
	/*
	* 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/highuid.h>
	#include <linux/smp_lock.h>
	#include <linux/vmalloc.h>

	#include <linux/ncp_fs.h>

	#include <asm/uaccess.h>

	#include "ncplib_kernel.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 file *file,
	struct ncp_fs_info __user *arg)
	{
	struct inode *inode = file->f_dentry->d_inode;
	struct ncp_fs_info info;

	if ((file_permission(file, MAY_WRITE) != 0)
	&& (current->uid != server->m.mounted_uid)) {
	return -EACCES;
	}
	if (copy_from_user(&info, arg, sizeof(info)))
	return -EFAULT;

	if (info.version != NCP_GET_FS_INFO_VERSION) {
	DPRINTK("info.version invalid: %d\n", info.version);
	return -EINVAL;
	}
	/* TODO: info.addr = server->m.serv_addr; */
	SET_UID(info.mounted_uid, 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 file *file,
	struct ncp_fs_info_v2 __user * arg)
	{
	struct inode *inode = file->f_dentry->d_inode;
	struct ncp_fs_info_v2 info2;

	if ((file_permission(file, MAY_WRITE) != 0)
	&& (current->uid != server->m.mounted_uid)) {
	return -EACCES;
	}
	if (copy_from_user(&info2, arg, sizeof(info2)))
	return -EFAULT;

	if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
	DPRINTK("info.version invalid: %d\n", info2.version);
	return -EINVAL;
	}
	info2.mounted_uid = 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; /* an 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 file *file,
	struct compat_ncp_fs_info_v2 __user * arg)
	{
	struct inode *inode = file->f_dentry->d_inode;
	struct compat_ncp_fs_info_v2 info2;

	if ((file_permission(file, MAY_WRITE) != 0)
	&& (current->uid != server->m.mounted_uid)) {
	return -EACCES;
	}
	if (copy_from_user(&info2, arg, sizeof(info2)))
	return -EFAULT;

	if (info2.version != NCP_GET_FS_INFO_VERSION_V2) {
	DPRINTK("info.version invalid: %d\n", info2.version);
	return -EINVAL;
	}
	info2.mounted_uid = 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;

	if (!capable(CAP_SYS_ADMIN))
	return -EACCES;
	if (server->root_setuped)
	return -EBUSY;

	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();
	NCP_CLR_FLAG(server, NCP_FLAG_UTF8);
	} else if (!strcmp(user.iocharset, "utf8")) {
	iocharset = load_nls_default();
	NCP_SET_FLAG(server, NCP_FLAG_UTF8);
	} else {
	iocharset = load_nls(user.iocharset);
	if (!iocharset) {
	unload_nls(codepage);
	return -EBADRQC;
	}
	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;

	if (oldset_cp)
	unload_nls(oldset_cp);
	if (oldset_io)
	unload_nls(oldset_io);

	return 0;
	}

	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));
	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;
	}

	if (copy_to_user(arg, &user, sizeof(user)))
	return -EFAULT;
	return 0;
	}
	#endif /* CONFIG_NCPFS_NLS */

	int ncp_ioctl(struct inode inode, struct file filp,
	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:
	if ((file_permission(filp, MAY_WRITE) != 0)
	&& (current->uid != server->m.mounted_uid)) {
	return -EACCES;
	}
	#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);
	DPRINTK("ncp_ioctl: 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 (!capable(CAP_SYS_ADMIN))
	return -EACCES;
	if (!(server->m.int_flags & NCP_IMOUNT_LOGGEDIN_POSSIBLE))
	return -EINVAL;
	if (server->root_setuped)
	return -EBUSY;
	server->root_setuped = 1;
	return ncp_conn_logged_in(inode->i_sb);

	case NCP_IOC_GET_FS_INFO:
	return ncp_get_fs_info(server, filp, argp);

	case NCP_IOC_GET_FS_INFO_V2:
	return ncp_get_fs_info_v2(server, filp, argp);

	#ifdef CONFIG_COMPAT
	case NCP_IOC_GET_FS_INFO_V2_32:
	return ncp_get_compat_fs_info_v2(server, filp, 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:
	case NCP_IOC_GETMOUNTUID32:
	case NCP_IOC_GETMOUNTUID64:
	if ((file_permission(filp, MAY_READ) != 0)
	&& (current->uid != server->m.mounted_uid)) {
	return -EACCES;
	}
	if (cmd == NCP_IOC_GETMOUNTUID16) {
	u16 uid;
	SET_UID(uid, server->m.mounted_uid);
	if (put_user(uid, (u16 __user *)argp))
	return -EFAULT;
	} else if (cmd == NCP_IOC_GETMOUNTUID32) {
	if (put_user(server->m.mounted_uid,
	(u32 __user *)argp))
	return -EFAULT;
	} else {
	if (put_user(server->m.mounted_uid,
	(u64 __user *)argp))
	return -EFAULT;
	}
	return 0;

	case NCP_IOC_GETROOT:
	{
	struct ncp_setroot_ioctl sr;

	if ((file_permission(filp, MAY_READ) != 0)
	&& (current->uid != server->m.mounted_uid))
	{
	return -EACCES;
	}
	if (server->m.mounted_vol[0]) {
	struct dentry* dentry = inode->i_sb->s_root;

	if (dentry) {
	struct inode* inode = dentry->d_inode;

	if (inode) {
	sr.volNumber = NCP_FINFO(inode)->volNumber;
	sr.dirEntNum = NCP_FINFO(inode)->dirEntNum;
	sr.namespace = server->name_space[sr.volNumber];
	} else
	DPRINTK("ncpfs: s_root->d_inode==NULL\n");
	} else
	DPRINTK("ncpfs: s_root==NULL\n");
	} else {
	sr.volNumber = -1;
	sr.namespace = 0;
	sr.dirEntNum = 0;
	}
	if (copy_to_user(argp, &sr, sizeof(sr)))
	return -EFAULT;
	return 0;
	}
	case NCP_IOC_SETROOT:
	{
	struct ncp_setroot_ioctl sr;
	__u32 vnum;
	__le32 de;
	__le32 dosde;
	struct dentry* dentry;

	if (!capable(CAP_SYS_ADMIN))
	{
	return -EACCES;
	}
	if (server->root_setuped) return -EBUSY;
	if (copy_from_user(&sr, argp, sizeof(sr)))
	return -EFAULT;
	if (sr.volNumber < 0) {
	server->m.mounted_vol[0] = 0;
	vnum = NCP_NUMBER_OF_VOLUMES;
	de = 0;
	dosde = 0;
	} else if (sr.volNumber >= NCP_NUMBER_OF_VOLUMES) {
	return -EINVAL;
	} else if (ncp_mount_subdir(server, sr.volNumber,
	sr.namespace, sr.dirEntNum,
	&vnum, &de, &dosde)) {
	return -ENOENT;
	}

	dentry = inode->i_sb->s_root;
	server->root_setuped = 1;
	if (dentry) {
	struct inode* inode = dentry->d_inode;

	if (inode) {
	NCP_FINFO(inode)->volNumber = vnum;
	NCP_FINFO(inode)->dirEntNum = de;
	NCP_FINFO(inode)->DosDirNum = dosde;
	} else
	DPRINTK("ncpfs: s_root->d_inode==NULL\n");
	} else
	DPRINTK("ncpfs: s_root==NULL\n");

	return 0;
	}

	#ifdef CONFIG_NCPFS_PACKET_SIGNING
	case NCP_IOC_SIGN_INIT:
	if ((file_permission(filp, MAY_WRITE) != 0)
	&& (current->uid != server->m.mounted_uid))
	{
	return -EACCES;
	}
	if (argp) {
	if (server->sign_wanted)
	{
	struct ncp_sign_init sign;

	if (copy_from_user(&sign, argp, sizeof(sign)))
	return -EFAULT;
	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;
	}
	return 0;

	case NCP_IOC_SIGN_WANTED:
	if ((file_permission(filp, MAY_READ) != 0)
	&& (current->uid != server->m.mounted_uid))
	{
	return -EACCES;
	}

	if (put_user(server->sign_wanted, (int __user *)argp))
	return -EFAULT;
	return 0;
	case NCP_IOC_SET_SIGN_WANTED:
	{
	int newstate;

	if ((file_permission(filp, MAY_WRITE) != 0)
	&& (current->uid != server->m.mounted_uid))
	{
	return -EACCES;
	}
	/* get only low 8 bits... */
	if (get_user(newstate, (unsigned char __user *)argp))
	return -EFAULT;
	if (server->sign_active) {
	/* cannot turn signatures OFF when active */
	if (!newstate) return -EINVAL;
	} else {
	server->sign_wanted = newstate != 0;
	}
	return 0;
	}

	#endif /* CONFIG_NCPFS_PACKET_SIGNING */

	#ifdef CONFIG_NCPFS_IOCTL_LOCKING
	case NCP_IOC_LOCKUNLOCK:
	if ((file_permission(filp, MAY_WRITE) != 0)
	&& (current->uid != server->m.mounted_uid))
	{
	return -EACCES;
	}
	{
	struct ncp_lock_ioctl rqdata;
	int result;

	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 = -EIO;
	if (!ncp_conn_valid(server))
	goto outrel;
	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:
	if (current->uid != server->m.mounted_uid) {
	return -EACCES;
	}
	{
	struct compat_ncp_objectname_ioctl user;
	size_t outl;

	if (copy_from_user(&user, argp, sizeof(user)))
	return -EFAULT;
	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;
	if (outl) {
	if (copy_to_user(compat_ptr(user.object_name),
	server->auth.object_name,
	outl)) return -EFAULT;
	}
	if (copy_to_user(argp, &user, sizeof(user)))
	return -EFAULT;
	return 0;
	}
	#endif
	case NCP_IOC_GETOBJECTNAME:
	if (current->uid != server->m.mounted_uid) {
	return -EACCES;
	}
	{
	struct ncp_objectname_ioctl user;
	size_t outl;

	if (copy_from_user(&user, argp, sizeof(user)))
	return -EFAULT;
	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;
	if (outl) {
	if (copy_to_user(user.object_name,
	server->auth.object_name,
	outl)) return -EFAULT;
	}
	if (copy_to_user(argp, &user, sizeof(user)))
	return -EFAULT;
	return 0;
	}
	#ifdef CONFIG_COMPAT
	case NCP_IOC_SETOBJECTNAME_32:
	#endif
	case NCP_IOC_SETOBJECTNAME:
	if (current->uid != server->m.mounted_uid) {
	return -EACCES;
	}
	{
	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 = kmalloc(user.object_name_len, GFP_USER);
	if (!newname)
	return -ENOMEM;
	if (copy_from_user(newname, user.object_name, user.object_name_len)) {
	kfree(newname);
	return -EFAULT;
	}
	} else {
	newname = NULL;
	}
	/* enter critical section */
	/* maybe that kfree can sleep so do that this way */
	/* it is at least more SMP friendly (in future...) */
	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;
	/* leave critical section */
	kfree(oldprivate);
	kfree(oldname);
	return 0;
	}
	#ifdef CONFIG_COMPAT
	case NCP_IOC_GETPRIVATEDATA_32:
	#endif
	case NCP_IOC_GETPRIVATEDATA:
	if (current->uid != server->m.mounted_uid) {
	return -EACCES;
	}
	{
	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;

	outl = user.len;
	user.len = server->priv.len;
	if (outl > user.len) outl = user.len;
	if (outl) {
	if (copy_to_user(user.data,
	server->priv.data,
	outl)) return -EFAULT;
	}
	#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:
	if (current->uid != server->m.mounted_uid) {
	return -EACCES;
	}
	{
	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 = kmalloc(user.len, GFP_USER);
	if (!new)
	return -ENOMEM;
	if (copy_from_user(new, user.data, user.len)) {
	kfree(new);
	return -EFAULT;
	}
	} else {
	new = NULL;
	}
	/* enter critical section */
	old = server->priv.data;
	oldlen = server->priv.len;
	server->priv.len = user.len;
	server->priv.data = new;
	/* leave critical section */
	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:
	if ((file_permission(filp, MAY_WRITE) != 0) &&
	(current->uid != server->m.mounted_uid))
	return -EACCES;
	{
	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;
	server->dentry_ttl = user;
	return 0;
	}

	case NCP_IOC_GETDENTRYTTL:
	{
	u_int32_t user = (server->dentry_ttl * 1000) / HZ;
	if (copy_to_user(argp, &user, sizeof(user)))
	return -EFAULT;
	return 0;
	}

	}
	return -EINVAL;
	}

	#ifdef CONFIG_COMPAT
	long ncp_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
	{
	struct inode *inode = file->f_dentry->d_inode;
	int ret;

	lock_kernel();
	arg = (unsigned long) compat_ptr(arg);
	ret = ncp_ioctl(inode, file, cmd, arg);
	unlock_kernel();
	return ret;
	}
	#endif