Initial import

1 files changed, 1321 insertions, 0 deletions

diff --git a/fs/ncpfs/ncplib_kernel.c b/fs/ncpfs/ncplib_kernel.c
new file mode 100644
index 000000000..88dbbc9fc
--- /dev/null
+++ b/fs/ncpfs/ncplib_kernel.c
@@ -0,0 +1,1321 @@
+/*
+ *  ncplib_kernel.c
+ *
+ *  Copyright (C) 1995, 1996 by Volker Lendecke
+ *  Modified for big endian by J.F. Chadima and David S. Miller
+ *  Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache
+ *  Modified 1999 Wolfram Pienkoss for NLS
+ *  Modified 2000 Ben Harris, University of Cambridge for NFS NS meta-info
+ *
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include "ncp_fs.h"
+
+static inline void assert_server_locked(struct ncp_server *server)
+{
+	if (server->lock == 0) {
+		ncp_dbg(1, "server not locked!\n");
+	}
+}
+
+static void ncp_add_byte(struct ncp_server *server, __u8 x)
+{
+	assert_server_locked(server);
+	*(__u8 *) (&(server->packet[server->current_size])) = x;
+	server->current_size += 1;
+	return;
+}
+
+static void ncp_add_word(struct ncp_server *server, __le16 x)
+{
+	assert_server_locked(server);
+	put_unaligned(x, (__le16 *) (&(server->packet[server->current_size])));
+	server->current_size += 2;
+	return;
+}
+
+static void ncp_add_be16(struct ncp_server *server, __u16 x)
+{
+	assert_server_locked(server);
+	put_unaligned(cpu_to_be16(x), (__be16 *) (&(server->packet[server->current_size])));
+	server->current_size += 2;
+}
+
+static void ncp_add_dword(struct ncp_server *server, __le32 x)
+{
+	assert_server_locked(server);
+	put_unaligned(x, (__le32 *) (&(server->packet[server->current_size])));
+	server->current_size += 4;
+	return;
+}
+
+static void ncp_add_be32(struct ncp_server *server, __u32 x)
+{
+	assert_server_locked(server);
+	put_unaligned(cpu_to_be32(x), (__be32 *)(&(server->packet[server->current_size])));
+	server->current_size += 4;
+}
+
+static inline void ncp_add_dword_lh(struct ncp_server *server, __u32 x) {
+	ncp_add_dword(server, cpu_to_le32(x));
+}
+
+static void ncp_add_mem(struct ncp_server *server, const void *source, int size)
+{
+	assert_server_locked(server);
+	memcpy(&(server->packet[server->current_size]), source, size);
+	server->current_size += size;
+	return;
+}
+
+static void ncp_add_pstring(struct ncp_server *server, const char *s)
+{
+	int len = strlen(s);
+	assert_server_locked(server);
+	if (len > 255) {
+		ncp_dbg(1, "string too long: %s\n", s);
+		len = 255;
+	}
+	ncp_add_byte(server, len);
+	ncp_add_mem(server, s, len);
+	return;
+}
+
+static inline void ncp_init_request(struct ncp_server *server)
+{
+	ncp_lock_server(server);
+
+	server->current_size = sizeof(struct ncp_request_header);
+	server->has_subfunction = 0;
+}
+
+static inline void ncp_init_request_s(struct ncp_server *server, int subfunction)
+{
+	ncp_lock_server(server);
+	
+	server->current_size = sizeof(struct ncp_request_header) + 2;
+	ncp_add_byte(server, subfunction);
+
+	server->has_subfunction = 1;
+}
+
+static inline char *
+ncp_reply_data(struct ncp_server *server, int offset)
+{
+	return &(server->packet[sizeof(struct ncp_reply_header) + offset]);
+}
+
+static inline u8 BVAL(const void *data)
+{
+	return *(const u8 *)data;
+}
+
+static u8 ncp_reply_byte(struct ncp_server *server, int offset)
+{
+	return *(const u8 *)ncp_reply_data(server, offset);
+}
+
+static inline u16 WVAL_LH(const void *data)
+{
+	return get_unaligned_le16(data);
+}
+
+static u16
+ncp_reply_le16(struct ncp_server *server, int offset)
+{
+	return get_unaligned_le16(ncp_reply_data(server, offset));
+}
+
+static u16
+ncp_reply_be16(struct ncp_server *server, int offset)
+{
+	return get_unaligned_be16(ncp_reply_data(server, offset));
+}
+
+static inline u32 DVAL_LH(const void *data)
+{
+	return get_unaligned_le32(data);
+}
+
+static __le32
+ncp_reply_dword(struct ncp_server *server, int offset)
+{
+	return get_unaligned((__le32 *)ncp_reply_data(server, offset));
+}
+
+static inline __u32 ncp_reply_dword_lh(struct ncp_server* server, int offset) {
+	return le32_to_cpu(ncp_reply_dword(server, offset));
+}
+
+int
+ncp_negotiate_buffersize(struct ncp_server *server, int size, int *target)
+{
+	int result;
+
+	ncp_init_request(server);
+	ncp_add_be16(server, size);
+
+	if ((result = ncp_request(server, 33)) != 0) {
+		ncp_unlock_server(server);
+		return result;
+	}
+	*target = min_t(unsigned int, ncp_reply_be16(server, 0), size);
+
+	ncp_unlock_server(server);
+	return 0;
+}
+
+
+/* options: 
+ *	bit 0	ipx checksum
+ *	bit 1	packet signing
+ */
+int
+ncp_negotiate_size_and_options(struct ncp_server *server, 
+	int size, int options, int *ret_size, int *ret_options) {
+	int result;
+
+	/* there is minimum */
+	if (size < NCP_BLOCK_SIZE) size = NCP_BLOCK_SIZE;
+
+	ncp_init_request(server);
+	ncp_add_be16(server, size);
+	ncp_add_byte(server, options);
+	
+	if ((result = ncp_request(server, 0x61)) != 0)
+	{
+		ncp_unlock_server(server);
+		return result;
+	}
+
+	/* NCP over UDP returns 0 (!!!) */
+	result = ncp_reply_be16(server, 0);
+	if (result >= NCP_BLOCK_SIZE)
+		size = min(result, size);
+	*ret_size = size;
+	*ret_options = ncp_reply_byte(server, 4);
+
+	ncp_unlock_server(server);
+	return 0;
+}
+
+int ncp_get_volume_info_with_number(struct ncp_server* server,
+			     int n, struct ncp_volume_info* target) {
+	int result;
+	int len;
+
+	ncp_init_request_s(server, 44);
+	ncp_add_byte(server, n);
+
+	if ((result = ncp_request(server, 22)) != 0) {
+		goto out;
+	}
+	target->total_blocks = ncp_reply_dword_lh(server, 0);
+	target->free_blocks = ncp_reply_dword_lh(server, 4);
+	target->purgeable_blocks = ncp_reply_dword_lh(server, 8);
+	target->not_yet_purgeable_blocks = ncp_reply_dword_lh(server, 12);
+	target->total_dir_entries = ncp_reply_dword_lh(server, 16);
+	target->available_dir_entries = ncp_reply_dword_lh(server, 20);
+	target->sectors_per_block = ncp_reply_byte(server, 28);
+
+	memset(&(target->volume_name), 0, sizeof(target->volume_name));
+
+	result = -EIO;
+	len = ncp_reply_byte(server, 29);
+	if (len > NCP_VOLNAME_LEN) {
+		ncp_dbg(1, "volume name too long: %d\n", len);
+		goto out;
+	}
+	memcpy(&(target->volume_name), ncp_reply_data(server, 30), len);
+	result = 0;
+out:
+	ncp_unlock_server(server);
+	return result;
+}
+
+int ncp_get_directory_info(struct ncp_server* server, __u8 n, 
+			   struct ncp_volume_info* target) {
+	int result;
+	int len;
+
+	ncp_init_request_s(server, 45);
+	ncp_add_byte(server, n);
+
+	if ((result = ncp_request(server, 22)) != 0) {
+		goto out;
+	}
+	target->total_blocks = ncp_reply_dword_lh(server, 0);
+	target->free_blocks = ncp_reply_dword_lh(server, 4);
+	target->purgeable_blocks = 0;
+	target->not_yet_purgeable_blocks = 0;
+	target->total_dir_entries = ncp_reply_dword_lh(server, 8);
+	target->available_dir_entries = ncp_reply_dword_lh(server, 12);
+	target->sectors_per_block = ncp_reply_byte(server, 20);
+
+	memset(&(target->volume_name), 0, sizeof(target->volume_name));
+
+	result = -EIO;
+	len = ncp_reply_byte(server, 21);
+	if (len > NCP_VOLNAME_LEN) {
+		ncp_dbg(1, "volume name too long: %d\n", len);
+		goto out;
+	}
+	memcpy(&(target->volume_name), ncp_reply_data(server, 22), len);
+	result = 0;
+out:
+	ncp_unlock_server(server);
+	return result;
+}
+
+int
+ncp_close_file(struct ncp_server *server, const char *file_id)
+{
+	int result;
+
+	ncp_init_request(server);
+	ncp_add_byte(server, 0);
+	ncp_add_mem(server, file_id, 6);
+
+	result = ncp_request(server, 66);
+	ncp_unlock_server(server);
+	return result;
+}
+
+int
+ncp_make_closed(struct inode *inode)
+{
+	int err;
+
+	err = 0;
+	mutex_lock(&NCP_FINFO(inode)->open_mutex);
+	if (atomic_read(&NCP_FINFO(inode)->opened) == 1) {
+		atomic_set(&NCP_FINFO(inode)->opened, 0);
+		err = ncp_close_file(NCP_SERVER(inode), NCP_FINFO(inode)->file_handle);
+
+		if (!err)
+			ncp_vdbg("volnum=%d, dirent=%u, error=%d\n",
+				 NCP_FINFO(inode)->volNumber,
+				 NCP_FINFO(inode)->dirEntNum, err);
+	}
+	mutex_unlock(&NCP_FINFO(inode)->open_mutex);
+	return err;
+}
+
+static void ncp_add_handle_path(struct ncp_server *server, __u8 vol_num,
+				__le32 dir_base, int have_dir_base, 
+				const char *path)
+{
+	ncp_add_byte(server, vol_num);
+	ncp_add_dword(server, dir_base);
+	if (have_dir_base != 0) {
+		ncp_add_byte(server, 1);	/* dir_base */
+	} else {
+		ncp_add_byte(server, 0xff);	/* no handle */
+	}
+	if (path != NULL) {
+		ncp_add_byte(server, 1);	/* 1 component */
+		ncp_add_pstring(server, path);
+	} else {
+		ncp_add_byte(server, 0);
+	}
+}
+
+int ncp_dirhandle_alloc(struct ncp_server* server, __u8 volnum, __le32 dirent,
+			__u8* dirhandle) {
+	int result;
+
+	ncp_init_request(server);
+	ncp_add_byte(server, 12);		/* subfunction */
+	ncp_add_byte(server, NW_NS_DOS);
+	ncp_add_byte(server, 0);
+	ncp_add_word(server, 0);
+	ncp_add_handle_path(server, volnum, dirent, 1, NULL);
+	if ((result = ncp_request(server, 87)) == 0) {
+		*dirhandle = ncp_reply_byte(server, 0);
+	}
+	ncp_unlock_server(server);
+	return result;
+}
+
+int ncp_dirhandle_free(struct ncp_server* server, __u8 dirhandle) {
+	int result;
+	
+	ncp_init_request_s(server, 20);
+	ncp_add_byte(server, dirhandle);
+	result = ncp_request(server, 22);
+	ncp_unlock_server(server);
+	return result;
+}
+
+void ncp_extract_file_info(const void *structure, struct nw_info_struct *target)
+{
+	const __u8 *name_len;
+	const int info_struct_size = offsetof(struct nw_info_struct, nameLen);
+
+	memcpy(target, structure, info_struct_size);
+	name_len = structure + info_struct_size;
+	target->nameLen = *name_len;
+	memcpy(target->entryName, name_len + 1, *name_len);
+	target->entryName[*name_len] = '\0';
+	target->volNumber = le32_to_cpu(target->volNumber);
+	return;
+}
+
+#ifdef CONFIG_NCPFS_NFS_NS
+static inline void ncp_extract_nfs_info(const unsigned char *structure,
+				 struct nw_nfs_info *target)
+{
+	target->mode = DVAL_LH(structure);
+	target->rdev = DVAL_LH(structure + 8);
+}
+#endif
+
+int ncp_obtain_nfs_info(struct ncp_server *server,
+		        struct nw_info_struct *target)
+
+{
+	int result = 0;
+#ifdef CONFIG_NCPFS_NFS_NS
+	__u32 volnum = target->volNumber;
+
+	if (ncp_is_nfs_extras(server, volnum)) {
+		ncp_init_request(server);
+		ncp_add_byte(server, 19);	/* subfunction */
+		ncp_add_byte(server, server->name_space[volnum]);
+		ncp_add_byte(server, NW_NS_NFS);
+		ncp_add_byte(server, 0);
+		ncp_add_byte(server, volnum);
+		ncp_add_dword(server, target->dirEntNum);
+		/* We must retrieve both nlinks and rdev, otherwise some server versions
+		   report zeroes instead of valid data */
+		ncp_add_dword_lh(server, NSIBM_NFS_MODE | NSIBM_NFS_NLINKS | NSIBM_NFS_RDEV);
+
+		if ((result = ncp_request(server, 87)) == 0) {
+			ncp_extract_nfs_info(ncp_reply_data(server, 0), &target->nfs);
+			ncp_dbg(1, "(%s) mode=0%o, rdev=0x%x\n",
+				target->entryName, target->nfs.mode,
+				target->nfs.rdev);
+		} else {
+			target->nfs.mode = 0;
+			target->nfs.rdev = 0;
+		}
+	        ncp_unlock_server(server);
+
+	} else
+#endif
+	{
+		target->nfs.mode = 0;
+		target->nfs.rdev = 0;
+	}
+	return result;
+}
+
+/*
+ * Returns information for a (one-component) name relative to
+ * the specified directory.
+ */
+int ncp_obtain_info(struct ncp_server *server, struct inode *dir, const char *path,
+			struct nw_info_struct *target)
+{
+	__u8  volnum = NCP_FINFO(dir)->volNumber;
+	__le32 dirent = NCP_FINFO(dir)->dirEntNum;
+	int result;
+
+	if (target == NULL) {
+		pr_err("%s: invalid call\n", __func__);
+		return -EINVAL;
+	}
+	ncp_init_request(server);
+	ncp_add_byte(server, 6);	/* subfunction */
+	ncp_add_byte(server, server->name_space[volnum]);
+	ncp_add_byte(server, server->name_space[volnum]); /* N.B. twice ?? */
+	ncp_add_word(server, cpu_to_le16(0x8006));	/* get all */
+	ncp_add_dword(server, RIM_ALL);
+	ncp_add_handle_path(server, volnum, dirent, 1, path);
+
+	if ((result = ncp_request(server, 87)) != 0)
+		goto out;
+	ncp_extract_file_info(ncp_reply_data(server, 0), target);
+	ncp_unlock_server(server);
+	
+	result = ncp_obtain_nfs_info(server, target);
+	return result;
+
+out:
+	ncp_unlock_server(server);
+	return result;
+}
+
+#ifdef CONFIG_NCPFS_NFS_NS
+static int
+ncp_obtain_DOS_dir_base(struct ncp_server *server,
+		__u8 ns, __u8 volnum, __le32 dirent,
+		const char *path, /* At most 1 component */
+		__le32 *DOS_dir_base)
+{
+	int result;
+
+	ncp_init_request(server);
+	ncp_add_byte(server, 6); /* subfunction */
+	ncp_add_byte(server, ns);
+	ncp_add_byte(server, ns);
+	ncp_add_word(server, cpu_to_le16(0x8006)); /* get all */
+	ncp_add_dword(server, RIM_DIRECTORY);
+	ncp_add_handle_path(server, volnum, dirent, 1, path);
+
+	if ((result = ncp_request(server, 87)) == 0)
+	{
+	   	if (DOS_dir_base) *DOS_dir_base=ncp_reply_dword(server, 0x34);
+	}
+	ncp_unlock_server(server);
+	return result;
+}
+#endif /* CONFIG_NCPFS_NFS_NS */
+
+static inline int
+ncp_get_known_namespace(struct ncp_server *server, __u8 volume)
+{
+#if defined(CONFIG_NCPFS_OS2_NS) || defined(CONFIG_NCPFS_NFS_NS)
+	int result;
+	__u8 *namespace;
+	__u16 no_namespaces;
+
+	ncp_init_request(server);
+	ncp_add_byte(server, 24);	/* Subfunction: Get Name Spaces Loaded */
+	ncp_add_word(server, 0);
+	ncp_add_byte(server, volume);
+
+	if ((result = ncp_request(server, 87)) != 0) {
+		ncp_unlock_server(server);
+		return NW_NS_DOS; /* not result ?? */
+	}
+
+	result = NW_NS_DOS;
+	no_namespaces = ncp_reply_le16(server, 0);
+	namespace = ncp_reply_data(server, 2);
+
+	while (no_namespaces > 0) {
+		ncp_dbg(1, "found %d on %d\n", *namespace, volume);
+
+#ifdef CONFIG_NCPFS_NFS_NS
+		if ((*namespace == NW_NS_NFS) && !(server->m.flags&NCP_MOUNT_NO_NFS)) 
+		{
+			result = NW_NS_NFS;
+			break;
+		}
+#endif	/* CONFIG_NCPFS_NFS_NS */
+#ifdef CONFIG_NCPFS_OS2_NS
+		if ((*namespace == NW_NS_OS2) && !(server->m.flags&NCP_MOUNT_NO_OS2))
+		{
+			result = NW_NS_OS2;
+		}
+#endif	/* CONFIG_NCPFS_OS2_NS */
+		namespace += 1;
+		no_namespaces -= 1;
+	}
+	ncp_unlock_server(server);
+	return result;
+#else	/* neither OS2 nor NFS - only DOS */
+	return NW_NS_DOS;
+#endif	/* defined(CONFIG_NCPFS_OS2_NS) || defined(CONFIG_NCPFS_NFS_NS) */
+}
+
+int
+ncp_update_known_namespace(struct ncp_server *server, __u8 volume, int *ret_ns)
+{
+	int ns = ncp_get_known_namespace(server, volume);
+
+	if (ret_ns)
+		*ret_ns = ns;
+
+	ncp_dbg(1, "namespace[%d] = %d\n", volume, server->name_space[volume]);
+
+	if (server->name_space[volume] == ns)
+		return 0;
+	server->name_space[volume] = ns;
+	return 1;
+}
+
+static int
+ncp_ObtainSpecificDirBase(struct ncp_server *server,
+		__u8 nsSrc, __u8 nsDst, __u8 vol_num, __le32 dir_base,
+		const char *path, /* At most 1 component */
+		__le32 *dirEntNum, __le32 *DosDirNum)
+{
+	int result;
+
+	ncp_init_request(server);
+	ncp_add_byte(server, 6); /* subfunction */
+	ncp_add_byte(server, nsSrc);
+	ncp_add_byte(server, nsDst);
+	ncp_add_word(server, cpu_to_le16(0x8006)); /* get all */
+	ncp_add_dword(server, RIM_ALL);
+	ncp_add_handle_path(server, vol_num, dir_base, 1, path);
+
+	if ((result = ncp_request(server, 87)) != 0)
+	{
+		ncp_unlock_server(server);
+		return result;
+	}
+
+	if (dirEntNum)
+		*dirEntNum = ncp_reply_dword(server, 0x30);
+	if (DosDirNum)
+		*DosDirNum = ncp_reply_dword(server, 0x34);
+	ncp_unlock_server(server);
+	return 0;
+}
+
+int
+ncp_mount_subdir(struct ncp_server *server,
+		 __u8 volNumber, __u8 srcNS, __le32 dirEntNum,
+		 __u32* volume, __le32* newDirEnt, __le32* newDosEnt)
+{
+	int dstNS;
+	int result;
+
+	ncp_update_known_namespace(server, volNumber, &dstNS);
+	if ((result = ncp_ObtainSpecificDirBase(server, srcNS, dstNS, volNumber, 
+				      dirEntNum, NULL, newDirEnt, newDosEnt)) != 0)
+	{
+		return result;
+	}
+	*volume = volNumber;
+	server->m.mounted_vol[1] = 0;
+	server->m.mounted_vol[0] = 'X';
+	return 0;
+}
+
+int 
+ncp_get_volume_root(struct ncp_server *server,
+		    const char *volname, __u32* volume, __le32* dirent, __le32* dosdirent)
+{
+	int result;
+
+	ncp_dbg(1, "looking up vol %s\n", volname);
+
+	ncp_init_request(server);
+	ncp_add_byte(server, 22);	/* Subfunction: Generate dir handle */
+	ncp_add_byte(server, 0);	/* DOS namespace */
+	ncp_add_byte(server, 0);	/* reserved */
+	ncp_add_byte(server, 0);	/* reserved */
+	ncp_add_byte(server, 0);	/* reserved */
+
+	ncp_add_byte(server, 0);	/* faked volume number */
+	ncp_add_dword(server, 0);	/* faked dir_base */
+	ncp_add_byte(server, 0xff);	/* Don't have a dir_base */
+	ncp_add_byte(server, 1);	/* 1 path component */
+	ncp_add_pstring(server, volname);
+
+	if ((result = ncp_request(server, 87)) != 0) {
+		ncp_unlock_server(server);
+		return result;
+	}
+	*dirent = *dosdirent = ncp_reply_dword(server, 4);
+	*volume = ncp_reply_byte(server, 8);
+	ncp_unlock_server(server);
+	return 0;
+}
+
+int
+ncp_lookup_volume(struct ncp_server *server,
+		  const char *volname, struct nw_info_struct *target)
+{
+	int result;
+
+	memset(target, 0, sizeof(*target));
+	result = ncp_get_volume_root(server, volname,
+			&target->volNumber, &target->dirEntNum, &target->DosDirNum);
+	if (result) {
+		return result;
+	}
+	ncp_update_known_namespace(server, target->volNumber, NULL);
+	target->nameLen = strlen(volname);
+	memcpy(target->entryName, volname, target->nameLen+1);
+	target->attributes = aDIR;
+	/* set dates to Jan 1, 1986  00:00 */
+	target->creationTime = target->modifyTime = cpu_to_le16(0x0000);
+	target->creationDate = target->modifyDate = target->lastAccessDate = cpu_to_le16(0x0C21);
+	target->nfs.mode = 0;
+	return 0;
+}
+
+int ncp_modify_file_or_subdir_dos_info_path(struct ncp_server *server,
+					    struct inode *dir,
+					    const char *path,
+					    __le32 info_mask,
+					    const struct nw_modify_dos_info *info)
+{
+	__u8  volnum = NCP_FINFO(dir)->volNumber;
+	__le32 dirent = NCP_FINFO(dir)->dirEntNum;
+	int result;
+
+	ncp_init_request(server);
+	ncp_add_byte(server, 7);	/* subfunction */
+	ncp_add_byte(server, server->name_space[volnum]);
+	ncp_add_byte(server, 0);	/* reserved */
+	ncp_add_word(server, cpu_to_le16(0x8006));	/* search attribs: all */
+
+	ncp_add_dword(server, info_mask);
+	ncp_add_mem(server, info, sizeof(*info));
+	ncp_add_handle_path(server, volnum, dirent, 1, path);
+
+	result = ncp_request(server, 87);
+	ncp_unlock_server(server);
+	return result;
+}
+
+int ncp_modify_file_or_subdir_dos_info(struct ncp_server *server,
+				       struct inode *dir,
+				       __le32 info_mask,
+				       const struct nw_modify_dos_info *info)
+{
+	return ncp_modify_file_or_subdir_dos_info_path(server, dir, NULL,
+		info_mask, info);
+}
+
+#ifdef CONFIG_NCPFS_NFS_NS
+int ncp_modify_nfs_info(struct ncp_server *server, __u8 volnum, __le32 dirent,
+			       __u32 mode, __u32 rdev)
+
+{
+	int result = 0;
+
+	ncp_init_request(server);
+	if (server->name_space[volnum] == NW_NS_NFS) {
+		ncp_add_byte(server, 25);	/* subfunction */
+		ncp_add_byte(server, server->name_space[volnum]);
+		ncp_add_byte(server, NW_NS_NFS);
+		ncp_add_byte(server, volnum);
+		ncp_add_dword(server, dirent);
+		/* we must always operate on both nlinks and rdev, otherwise
+		   rdev is not set */
+		ncp_add_dword_lh(server, NSIBM_NFS_MODE | NSIBM_NFS_NLINKS | NSIBM_NFS_RDEV);
+		ncp_add_dword_lh(server, mode);
+		ncp_add_dword_lh(server, 1);	/* nlinks */
+		ncp_add_dword_lh(server, rdev);
+		result = ncp_request(server, 87);
+	}
+	ncp_unlock_server(server);
+	return result;
+}
+#endif
+
+
+static int
+ncp_DeleteNSEntry(struct ncp_server *server,
+		  __u8 have_dir_base, __u8 volnum, __le32 dirent,
+		  const char* name, __u8 ns, __le16 attr)
+{
+	int result;
+
+	ncp_init_request(server);
+	ncp_add_byte(server, 8);	/* subfunction */
+	ncp_add_byte(server, ns);
+	ncp_add_byte(server, 0);	/* reserved */
+	ncp_add_word(server, attr);	/* search attribs: all */
+	ncp_add_handle_path(server, volnum, dirent, have_dir_base, name);
+
+	result = ncp_request(server, 87);
+	ncp_unlock_server(server);
+	return result;
+}
+
+int
+ncp_del_file_or_subdir2(struct ncp_server *server,
+			struct dentry *dentry)
+{
+	struct inode *inode = d_inode(dentry);
+	__u8  volnum;
+	__le32 dirent;
+
+	if (!inode) {
+		return 0xFF;	/* Any error */
+	}
+	volnum = NCP_FINFO(inode)->volNumber;
+	dirent = NCP_FINFO(inode)->DosDirNum;
+	return ncp_DeleteNSEntry(server, 1, volnum, dirent, NULL, NW_NS_DOS, cpu_to_le16(0x8006));
+}
+
+int
+ncp_del_file_or_subdir(struct ncp_server *server,
+		       struct inode *dir, const char *name)
+{
+	__u8  volnum = NCP_FINFO(dir)->volNumber;
+	__le32 dirent = NCP_FINFO(dir)->dirEntNum;
+	int name_space;
+
+	name_space = server->name_space[volnum];
+#ifdef CONFIG_NCPFS_NFS_NS
+	if (name_space == NW_NS_NFS)
+ 	{
+ 		int result;
+ 
+		result=ncp_obtain_DOS_dir_base(server, name_space, volnum, dirent, name, &dirent);
+ 		if (result) return result;
+		name = NULL;
+		name_space = NW_NS_DOS;
+ 	}
+#endif	/* CONFIG_NCPFS_NFS_NS */
+	return ncp_DeleteNSEntry(server, 1, volnum, dirent, name, name_space, cpu_to_le16(0x8006));
+}
+
+static inline void ConvertToNWfromDWORD(__u16 v0, __u16 v1, __u8 ret[6])
+{
+	__le16 *dest = (__le16 *) ret;
+	dest[1] = cpu_to_le16(v0);
+	dest[2] = cpu_to_le16(v1);
+	dest[0] = cpu_to_le16(v0 + 1);
+	return;
+}
+
+/* If both dir and name are NULL, then in target there's already a
+   looked-up entry that wants to be opened. */
+int ncp_open_create_file_or_subdir(struct ncp_server *server,
+				   struct inode *dir, const char *name,
+				   int open_create_mode,
+				   __le32 create_attributes,
+				   __le16 desired_acc_rights,
+				   struct ncp_entry_info *target)
+{
+	__le16 search_attribs = cpu_to_le16(0x0006);
+	__u8  volnum;
+	__le32 dirent;
+	int result;
+
+	volnum = NCP_FINFO(dir)->volNumber;
+	dirent = NCP_FINFO(dir)->dirEntNum;
+
+	if ((create_attributes & aDIR) != 0) {
+		search_attribs |= cpu_to_le16(0x8000);
+	}
+	ncp_init_request(server);
+	ncp_add_byte(server, 1);	/* subfunction */
+	ncp_add_byte(server, server->name_space[volnum]);
+	ncp_add_byte(server, open_create_mode);
+	ncp_add_word(server, search_attribs);
+	ncp_add_dword(server, RIM_ALL);
+	ncp_add_dword(server, create_attributes);
+	/* The desired acc rights seem to be the inherited rights mask
+	   for directories */
+	ncp_add_word(server, desired_acc_rights);
+	ncp_add_handle_path(server, volnum, dirent, 1, name);
+
+	if ((result = ncp_request(server, 87)) != 0)
+		goto out;
+	if (!(create_attributes & aDIR))
+		target->opened = 1;
+
+	/* in target there's a new finfo to fill */
+	ncp_extract_file_info(ncp_reply_data(server, 6), &(target->i));
+	target->volume = target->i.volNumber;
+	ConvertToNWfromDWORD(ncp_reply_le16(server, 0),
+			     ncp_reply_le16(server, 2),
+			     target->file_handle);
+	
+	ncp_unlock_server(server);
+
+	(void)ncp_obtain_nfs_info(server, &(target->i));
+	return 0;
+
+out:
+	ncp_unlock_server(server);
+	return result;
+}
+
+int
+ncp_initialize_search(struct ncp_server *server, struct inode *dir,
+			struct nw_search_sequence *target)
+{
+	__u8  volnum = NCP_FINFO(dir)->volNumber;
+	__le32 dirent = NCP_FINFO(dir)->dirEntNum;
+	int result;
+
+	ncp_init_request(server);
+	ncp_add_byte(server, 2);	/* subfunction */
+	ncp_add_byte(server, server->name_space[volnum]);
+	ncp_add_byte(server, 0);	/* reserved */
+	ncp_add_handle_path(server, volnum, dirent, 1, NULL);
+
+	result = ncp_request(server, 87);
+	if (result)
+		goto out;
+	memcpy(target, ncp_reply_data(server, 0), sizeof(*target));
+
+out:
+	ncp_unlock_server(server);
+	return result;
+}
+
+int ncp_search_for_fileset(struct ncp_server *server,
+			   struct nw_search_sequence *seq,
+			   int* more,
+			   int* cnt,
+			   char* buffer,
+			   size_t bufsize,
+			   char** rbuf,
+			   size_t* rsize)
+{
+	int result;
+
+	ncp_init_request(server);
+	ncp_add_byte(server, 20);
+	ncp_add_byte(server, server->name_space[seq->volNumber]);
+	ncp_add_byte(server, 0);		/* datastream */
+	ncp_add_word(server, cpu_to_le16(0x8006));
+	ncp_add_dword(server, RIM_ALL);
+	ncp_add_word(server, cpu_to_le16(32767));	/* max returned items */
+	ncp_add_mem(server, seq, 9);
+#ifdef CONFIG_NCPFS_NFS_NS
+	if (server->name_space[seq->volNumber] == NW_NS_NFS) {
+		ncp_add_byte(server, 0);	/* 0 byte pattern */
+	} else 
+#endif
+	{
+		ncp_add_byte(server, 2);	/* 2 byte pattern */
+		ncp_add_byte(server, 0xff);	/* following is a wildcard */
+		ncp_add_byte(server, '*');
+	}
+	result = ncp_request2(server, 87, buffer, bufsize);
+	if (result) {
+		ncp_unlock_server(server);
+		return result;
+	}
+	if (server->ncp_reply_size < 12) {
+		ncp_unlock_server(server);
+		return 0xFF;
+	}
+	*rsize = server->ncp_reply_size - 12;
+	ncp_unlock_server(server);
+	buffer = buffer + sizeof(struct ncp_reply_header);
+	*rbuf = buffer + 12;
+	*cnt = WVAL_LH(buffer + 10);
+	*more = BVAL(buffer + 9);
+	memcpy(seq, buffer, 9);
+	return 0;
+}
+
+static int
+ncp_RenameNSEntry(struct ncp_server *server,
+		  struct inode *old_dir, const char *old_name, __le16 old_type,
+		  struct inode *new_dir, const char *new_name)
+{
+	int result = -EINVAL;
+
+	if ((old_dir == NULL) || (old_name == NULL) ||
+	    (new_dir == NULL) || (new_name == NULL))
+		goto out;
+
+	ncp_init_request(server);
+	ncp_add_byte(server, 4);	/* subfunction */
+	ncp_add_byte(server, server->name_space[NCP_FINFO(old_dir)->volNumber]);
+	ncp_add_byte(server, 1);	/* rename flag */
+	ncp_add_word(server, old_type);	/* search attributes */
+
+	/* source Handle Path */
+	ncp_add_byte(server, NCP_FINFO(old_dir)->volNumber);
+	ncp_add_dword(server, NCP_FINFO(old_dir)->dirEntNum);
+	ncp_add_byte(server, 1);
+	ncp_add_byte(server, 1);	/* 1 source component */
+
+	/* dest Handle Path */
+	ncp_add_byte(server, NCP_FINFO(new_dir)->volNumber);
+	ncp_add_dword(server, NCP_FINFO(new_dir)->dirEntNum);
+	ncp_add_byte(server, 1);
+	ncp_add_byte(server, 1);	/* 1 destination component */
+
+	/* source path string */
+	ncp_add_pstring(server, old_name);
+	/* dest path string */
+	ncp_add_pstring(server, new_name);
+
+	result = ncp_request(server, 87);
+	ncp_unlock_server(server);
+out:
+	return result;
+}
+
+int ncp_ren_or_mov_file_or_subdir(struct ncp_server *server,
+				struct inode *old_dir, const char *old_name,
+				struct inode *new_dir, const char *new_name)
+{
+        int result;
+        __le16 old_type = cpu_to_le16(0x06);
+
+/* If somebody can do it atomic, call me... vandrove@vc.cvut.cz */
+	result = ncp_RenameNSEntry(server, old_dir, old_name, old_type,
+	                                   new_dir, new_name);
+        if (result == 0xFF)	/* File Not Found, try directory */
+	{
+		old_type = cpu_to_le16(0x16);
+		result = ncp_RenameNSEntry(server, old_dir, old_name, old_type,
+						   new_dir, new_name);
+	}
+	if (result != 0x92) return result;	/* All except NO_FILES_RENAMED */
+	result = ncp_del_file_or_subdir(server, new_dir, new_name);
+	if (result != 0) return -EACCES;
+	result = ncp_RenameNSEntry(server, old_dir, old_name, old_type,
+					   new_dir, new_name);
+	return result;
+}
+	
+
+/* We have to transfer to/from user space */
+int
+ncp_read_kernel(struct ncp_server *server, const char *file_id,
+	     __u32 offset, __u16 to_read, char *target, int *bytes_read)
+{
+	const char *source;
+	int result;
+
+	ncp_init_request(server);
+	ncp_add_byte(server, 0);
+	ncp_add_mem(server, file_id, 6);
+	ncp_add_be32(server, offset);
+	ncp_add_be16(server, to_read);
+
+	if ((result = ncp_request(server, 72)) != 0) {
+		goto out;
+	}
+	*bytes_read = ncp_reply_be16(server, 0);
+	source = ncp_reply_data(server, 2 + (offset & 1));
+
+	memcpy(target, source, *bytes_read);
+out:
+	ncp_unlock_server(server);
+	return result;
+}
+
+/* There is a problem... egrep and some other silly tools do:
+	x = mmap(NULL, MAP_PRIVATE, PROT_READ|PROT_WRITE, <ncpfs fd>, 32768);
+	read(<ncpfs fd>, x, 32768);
+   Now copying read result by copy_to_user causes pagefault. This pagefault
+   could not be handled because of server was locked due to read. So we have
+   to use temporary buffer. So ncp_unlock_server must be done before
+   copy_to_user (and for write, copy_from_user must be done before 
+   ncp_init_request... same applies for send raw packet ioctl). Because of
+   file is normally read in bigger chunks, caller provides kmalloced 
+   (vmalloced) chunk of memory with size >= to_read...
+ */
+int
+ncp_read_bounce(struct ncp_server *server, const char *file_id,
+	 __u32 offset, __u16 to_read, struct iov_iter *to,
+	 int *bytes_read, void *bounce, __u32 bufsize)
+{
+	int result;
+
+	ncp_init_request(server);
+	ncp_add_byte(server, 0);
+	ncp_add_mem(server, file_id, 6);
+	ncp_add_be32(server, offset);
+	ncp_add_be16(server, to_read);
+	result = ncp_request2(server, 72, bounce, bufsize);
+	ncp_unlock_server(server);
+	if (!result) {
+		int len = get_unaligned_be16((char *)bounce +
+			  sizeof(struct ncp_reply_header));
+		result = -EIO;
+		if (len <= to_read) {
+			char* source;
+
+			source = (char*)bounce + 
+			         sizeof(struct ncp_reply_header) + 2 + 
+			         (offset & 1);
+			*bytes_read = len;
+			result = 0;
+			if (copy_to_iter(source, len, to) != len)
+				result = -EFAULT;
+		}
+	}
+	return result;
+}
+
+int
+ncp_write_kernel(struct ncp_server *server, const char *file_id,
+		 __u32 offset, __u16 to_write,
+		 const char *source, int *bytes_written)
+{
+	int result;
+
+	ncp_init_request(server);
+	ncp_add_byte(server, 0);
+	ncp_add_mem(server, file_id, 6);
+	ncp_add_be32(server, offset);
+	ncp_add_be16(server, to_write);
+	ncp_add_mem(server, source, to_write);
+	
+	if ((result = ncp_request(server, 73)) == 0)
+		*bytes_written = to_write;
+	ncp_unlock_server(server);
+	return result;
+}
+
+#ifdef CONFIG_NCPFS_IOCTL_LOCKING
+int
+ncp_LogPhysicalRecord(struct ncp_server *server, const char *file_id,
+	  __u8 locktype, __u32 offset, __u32 length, __u16 timeout)
+{
+	int result;
+
+	ncp_init_request(server);
+	ncp_add_byte(server, locktype);
+	ncp_add_mem(server, file_id, 6);
+	ncp_add_be32(server, offset);
+	ncp_add_be32(server, length);
+	ncp_add_be16(server, timeout);
+
+	if ((result = ncp_request(server, 0x1A)) != 0)
+	{
+		ncp_unlock_server(server);
+		return result;
+	}
+	ncp_unlock_server(server);
+	return 0;
+}
+
+int
+ncp_ClearPhysicalRecord(struct ncp_server *server, const char *file_id,
+	  __u32 offset, __u32 length)
+{
+	int result;
+
+	ncp_init_request(server);
+	ncp_add_byte(server, 0);	/* who knows... lanalyzer says that */
+	ncp_add_mem(server, file_id, 6);
+	ncp_add_be32(server, offset);
+	ncp_add_be32(server, length);
+
+	if ((result = ncp_request(server, 0x1E)) != 0)
+	{
+		ncp_unlock_server(server);
+		return result;
+	}
+	ncp_unlock_server(server);
+	return 0;
+}
+#endif	/* CONFIG_NCPFS_IOCTL_LOCKING */
+
+#ifdef CONFIG_NCPFS_NLS
+/* This are the NLS conversion routines with inspirations and code parts
+ * from the vfat file system and hints from Petr Vandrovec.
+ */
+
+int
+ncp__io2vol(struct ncp_server *server, unsigned char *vname, unsigned int *vlen,
+		const unsigned char *iname, unsigned int ilen, int cc)
+{
+	struct nls_table *in = server->nls_io;
+	struct nls_table *out = server->nls_vol;
+	unsigned char *vname_start;
+	unsigned char *vname_end;
+	const unsigned char *iname_end;
+
+	iname_end = iname + ilen;
+	vname_start = vname;
+	vname_end = vname + *vlen - 1;
+
+	while (iname < iname_end) {
+		int chl;
+		wchar_t ec;
+
+		if (NCP_IS_FLAG(server, NCP_FLAG_UTF8)) {
+			int k;
+			unicode_t u;
+
+			k = utf8_to_utf32(iname, iname_end - iname, &u);
+			if (k < 0 || u > MAX_WCHAR_T)
+				return -EINVAL;
+			iname += k;
+			ec = u;
+		} else {
+			if (*iname == NCP_ESC) {
+				int k;
+
+				if (iname_end - iname < 5)
+					goto nospec;
+
+				ec = 0;
+				for (k = 1; k < 5; k++) {
+					unsigned char nc;
+
+					nc = iname[k] - '0';
+					if (nc >= 10) {
+						nc -= 'A' - '0' - 10;
+						if ((nc < 10) || (nc > 15)) {
+							goto nospec;
+						}
+					}
+					ec = (ec << 4) | nc;
+				}
+				iname += 5;
+			} else {
+nospec:;			
+				if ( (chl = in->char2uni(iname, iname_end - iname, &ec)) < 0)
+					return chl;
+				iname += chl;
+			}
+		}
+
+		/* unitoupper should be here! */
+
+		chl = out->uni2char(ec, vname, vname_end - vname);
+		if (chl < 0)
+			return chl;
+
+		/* this is wrong... */
+		if (cc) {
+			int chi;
+
+			for (chi = 0; chi < chl; chi++){
+				vname[chi] = ncp_toupper(out, vname[chi]);
+			}
+		}
+		vname += chl;
+	}
+
+	*vname = 0;
+	*vlen = vname - vname_start;
+	return 0;
+}
+
+int
+ncp__vol2io(struct ncp_server *server, unsigned char *iname, unsigned int *ilen,
+		const unsigned char *vname, unsigned int vlen, int cc)
+{
+	struct nls_table *in = server->nls_vol;
+	struct nls_table *out = server->nls_io;
+	const unsigned char *vname_end;
+	unsigned char *iname_start;
+	unsigned char *iname_end;
+	unsigned char *vname_cc;
+	int err;
+
+	vname_cc = NULL;
+
+	if (cc) {
+		int i;
+
+		/* this is wrong! */
+		vname_cc = kmalloc(vlen, GFP_KERNEL);
+		if (!vname_cc)
+			return -ENOMEM;
+		for (i = 0; i < vlen; i++)
+			vname_cc[i] = ncp_tolower(in, vname[i]);
+		vname = vname_cc;
+	}
+
+	iname_start = iname;
+	iname_end = iname + *ilen - 1;
+	vname_end = vname + vlen;
+
+	while (vname < vname_end) {
+		wchar_t ec;
+		int chl;
+
+		if ( (chl = in->char2uni(vname, vname_end - vname, &ec)) < 0) {
+			err = chl;
+			goto quit;
+		}
+		vname += chl;
+
+		/* unitolower should be here! */
+
+		if (NCP_IS_FLAG(server, NCP_FLAG_UTF8)) {
+			int k;
+
+			k = utf32_to_utf8(ec, iname, iname_end - iname);
+			if (k < 0) {
+				err = -ENAMETOOLONG;
+				goto quit;
+			}
+			iname += k;
+		} else {
+			if ( (chl = out->uni2char(ec, iname, iname_end - iname)) >= 0) {
+				iname += chl;
+			} else {
+				int k;
+
+				if (iname_end - iname < 5) {
+					err = -ENAMETOOLONG;
+					goto quit;
+				}
+				*iname = NCP_ESC;
+				for (k = 4; k > 0; k--) {
+					unsigned char v;
+					
+					v = (ec & 0xF) + '0';
+					if (v > '9') {
+						v += 'A' - '9' - 1;
+					}
+					iname[k] = v;
+					ec >>= 4;
+				}
+				iname += 5;
+			}
+		}
+	}
+
+	*iname = 0;
+	*ilen = iname - iname_start;
+	err = 0;
+quit:;
+	if (cc)
+		kfree(vname_cc);
+	return err;
+}
+
+#else
+
+int
+ncp__io2vol(unsigned char *vname, unsigned int *vlen,
+		const unsigned char *iname, unsigned int ilen, int cc)
+{
+	int i;
+
+	if (*vlen <= ilen)
+		return -ENAMETOOLONG;
+
+	if (cc)
+		for (i = 0; i < ilen; i++) {
+			*vname = toupper(*iname);
+			vname++;
+			iname++;
+		}
+	else {
+		memmove(vname, iname, ilen);
+		vname += ilen;
+	}
+
+	*vlen = ilen;
+	*vname = 0;
+	return 0;
+}
+
+int
+ncp__vol2io(unsigned char *iname, unsigned int *ilen,
+		const unsigned char *vname, unsigned int vlen, int cc)
+{
+	int i;
+
+	if (*ilen <= vlen)
+		return -ENAMETOOLONG;
+
+	if (cc)
+		for (i = 0; i < vlen; i++) {
+			*iname = tolower(*vname);
+			iname++;
+			vname++;
+		}
+	else {
+		memmove(iname, vname, vlen);
+		iname += vlen;
+	}
+
+	*ilen = vlen;
+	*iname = 0;
+	return 0;
+}
+
+#endif