ncplib_kernel.c

linux 内核源代码

	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 volnum, __le32 dirent,
		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, server->name_space[volnum]);
	ncp_add_byte(server, server->name_space[volnum]);
	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) {
		DPRINTK("get_namespaces: 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) */
}

static int
ncp_ObtainSpecificDirBase(struct ncp_server *server,
		__u8 nsSrc, __u8 nsDst, __u8 vol_num, __le32 dir_base,
		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;
	
	dstNS = ncp_get_known_namespace(server, volNumber);
	if ((result = ncp_ObtainSpecificDirBase(server, srcNS, dstNS, volNumber, 
				      dirEntNum, NULL, newDirEnt, newDosEnt)) != 0)
	{
		return result;
	}
	server->name_space[volNumber] = dstNS;
	*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;
	__u8 volnum;

	DPRINTK("ncp_get_volume_root: 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);
	volnum = ncp_reply_byte(server, 8);
	ncp_unlock_server(server);
	*volume = volnum;

	server->name_space[volnum] = ncp_get_known_namespace(server, volnum);

	DPRINTK("lookup_vol: namespace[%d] = %d\n",
		volnum, server->name_space[volnum]);

	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;
	}
	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;

	if (server->name_space[volnum] == NW_NS_NFS) {
		ncp_init_request(server);
		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,
		  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 = dentry->d_inode;
	__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, char *name)
{
	__u8  volnum = NCP_FINFO(dir)->volNumber;
	__le32 dirent = NCP_FINFO(dir)->dirEntNum;

#ifdef CONFIG_NCPFS_NFS_NS
	if (server->name_space[volnum]==NW_NS_NFS)
 	{
 		int result;
 
 		result=ncp_obtain_DOS_dir_base(server, volnum, dirent, name, &dirent);
 		if (result) return result;
 		return ncp_DeleteNSEntry(server, 1, volnum, dirent, NULL, NW_NS_DOS, cpu_to_le16(0x8006));
 	}
 	else
#endif	/* CONFIG_NCPFS_NFS_NS */
 		return ncp_DeleteNSEntry(server, 1, volnum, dirent, name, server->name_space[volnum], 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, 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;