1 // SPDX-License-Identifier: GPL-2.0-or-later
20 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR)  in cifs_remap()
22 	else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)  in cifs_remap()
30 /* Convert character using the SFU - "Services for Unix" remapping range */
64 /* Convert character using the SFM - "Services for Mac" remapping range */
69 		*target = src_char - 0xF000;  in convert_sfm_char()
108  * cifs_mapchar - convert a host-endian char to proper char in codepage
109  * @target - where converted character should be copied
110  * @src_char - 2 byte host-endian source character
111  * @cp - codepage to which character should be converted
112  * @map_type - How should the 7 NTFS/SMB reserved characters be mapped to UCS2?
134 	len = cp->uni2char(src_char, target, NLS_MAX_CHARSET_SIZE);  in cifs_mapchar()
142 	if (strcmp(cp->charset, "utf8"))  in cifs_mapchar()
144 	len = utf16s_to_utf8s(from, 3, UTF16_LITTLE_ENDIAN, target, 6);  in cifs_mapchar()
156  * cifs_from_utf16 - convert utf16le string to local charset
157  * @to - destination buffer
158  * @from - source buffer
159  * @tolen - destination buffer size (in bytes)
160  * @fromlen - source buffer size (in bytes)
161  * @codepage - codepage to which characters should be converted
162  * @mapchar - should characters be remapped according to the mapchars option?
164  * Convert a little-endian utf16le string (as sent by the server) to a string
172  * Note that some windows versions actually send multiword UTF-16 characters
173  * instead of straight UTF16-2. The linux nls routines however aren't able to
186 	__u16 ftmp[3];		/* ftmp[3] = 3array x 2bytes = 6bytes UTF-16 */  in cifs_from_utf16()
194 	safelen = tolen - (NLS_MAX_CHARSET_SIZE + nullsize);  in cifs_from_utf16()
215 			if ((outlen + charlen) > (tolen - nullsize))  in cifs_from_utf16()
223 		/* charlen (=bytes of UTF-8 for 1 character)  in cifs_from_utf16()
224 		 * 4bytes UTF-8(surrogate pair) is charlen=4  in cifs_from_utf16()
225 		 *   (4bytes UTF-16 code)  in cifs_from_utf16()
226 		 * 7-8bytes UTF-8(IVS) is charlen=3+4 or 4+4  in cifs_from_utf16()
227 		 *   (2 UTF-8 pairs divided to 2 UTF-16 pairs) */  in cifs_from_utf16()
231 			/* 5-6bytes UTF-8 */  in cifs_from_utf16()
235 	/* properly null-terminate string */  in cifs_from_utf16()
257 	if (!strcmp(codepage->charset, "utf8")) {  in cifs_strtoUTF16()
259 		 * convert utf8 -> utf16, we assume we have enough space  in cifs_strtoUTF16()
277 	for (i = 0; len && *from; i++, from += charlen, len -= charlen) {  in cifs_strtoUTF16()
278 		charlen = codepage->char2uni(from, len, &wchar_to);  in cifs_strtoUTF16()
295  * cifs_utf16_bytes - how long will a string be after conversion?
296  * @utf16 - pointer to input string
297  * @maxbytes - don't go past this many bytes of input string
298  * @codepage - destination codepage
335  * cifs_strndup_from_utf16 - copy a string from wire format to the local
337  * @src - source string
338  * @maxlen - don't walk past this many bytes in the source string
339  * @is_unicode - is this a unicode string?
340  * @codepage - destination codepage
448  * Convert 16 bit Unicode pathname to wire format from string in current code
450  * only legal in POSIX-like OS (if they are present in the string). Path
451  * names are little endian 16 bit Unicode on the wire
462 	wchar_t *wchar_to;	/* UTF-16 */  in cifsConvertToUTF16()
469 	wchar_to = kzalloc(6, GFP_KERNEL);  in cifsConvertToUTF16()
491 			if ((i == srclen - 1) || (source[i+1] == '\\'))  in cifsConvertToUTF16()
505 			charlen = cp->char2uni(source + i, srclen - i, &tmp);  in cifsConvertToUTF16()
516 			if (strcmp(cp->charset, "utf8") || !wchar_to)  in cifsConvertToUTF16()
519 				charlen = utf8_to_utf32(source + i, 6, &u);  in cifsConvertToUTF16()
526 					       wchar_to, 6);  in cifsConvertToUTF16()
533 				/* 1-3bytes UTF-8 to 2bytes UTF-16 */  in cifsConvertToUTF16()
536 				/* 4bytes UTF-8(surrogate pair) to 4bytes UTF-16  in cifsConvertToUTF16()
537 				 * 7-8bytes UTF-8(IVS) divided to 2 UTF-16  in cifsConvertToUTF16()
544 				/* 5-6bytes UTF-8 to 6bytes UTF-16 */  in cifsConvertToUTF16()
576  * cifs_local_to_utf16_bytes - how long will a string be after conversion?
577  * @from - pointer to input string
578  * @maxbytes - don't go past this many bytes of input string
579  * @codepage - source codepage
594 	for (i = 0; len && *from; i++, from += charlen, len -= charlen) {  in cifs_local_to_utf16_bytes()
595 		charlen = codepage->char2uni(from, len, &wchar_to);  in cifs_local_to_utf16_bytes()
604  * cifs_strndup_to_utf16 - copy a string to wire format from the local codepage
605  * @src - source string
606  * @maxlen - don't walk past this many bytes in the source string
607  * @utf16_len - the length of the allocated string in bytes (including null)
608  * @cp - source codepage
609  * @remap - map special chars