smb: move client and server files to common directory fs/smb

Move CIFS/SMB3 related client and server files (cifs.ko and ksmbd.ko
and helper modules) to new fs/smb subdirectory:

   fs/cifs --> fs/smb/client
   fs/ksmbd --> fs/smb/server
   fs/smbfs_common --> fs/smb/common

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

1 files changed, 0 insertions, 632 deletions

diff --git a/fs/cifs/cifs_unicode.c b/fs/cifs/cifs_unicode.c
deleted file mode 100644
index e7582dd79179..000000000000
--- a/fs/cifs/cifs_unicode.c
+++ /dev/null
@@ -1,632 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *
- *   Copyright (c) International Business Machines  Corp., 2000,2009
- *   Modified by Steve French (sfrench@us.ibm.com)
- */
-#include <linux/fs.h>
-#include <linux/slab.h>
-#include "cifs_fs_sb.h"
-#include "cifs_unicode.h"
-#include "cifs_uniupr.h"
-#include "cifspdu.h"
-#include "cifsglob.h"
-#include "cifs_debug.h"
-
-int cifs_remap(struct cifs_sb_info *cifs_sb)
-{
-	int map_type;
-
-	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR)
-		map_type = SFM_MAP_UNI_RSVD;
-	else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
-		map_type = SFU_MAP_UNI_RSVD;
-	else
-		map_type = NO_MAP_UNI_RSVD;
-
-	return map_type;
-}
-
-/* Convert character using the SFU - "Services for Unix" remapping range */
-static bool
-convert_sfu_char(const __u16 src_char, char *target)
-{
-	/*
-	 * BB: Cannot handle remapping UNI_SLASH until all the calls to
-	 *     build_path_from_dentry are modified, as they use slash as
-	 *     separator.
-	 */
-	switch (src_char) {
-	case UNI_COLON:
-		*target = ':';
-		break;
-	case UNI_ASTERISK:
-		*target = '*';
-		break;
-	case UNI_QUESTION:
-		*target = '?';
-		break;
-	case UNI_PIPE:
-		*target = '|';
-		break;
-	case UNI_GRTRTHAN:
-		*target = '>';
-		break;
-	case UNI_LESSTHAN:
-		*target = '<';
-		break;
-	default:
-		return false;
-	}
-	return true;
-}
-
-/* Convert character using the SFM - "Services for Mac" remapping range */
-static bool
-convert_sfm_char(const __u16 src_char, char *target)
-{
-	if (src_char >= 0xF001 && src_char <= 0xF01F) {
-		*target = src_char - 0xF000;
-		return true;
-	}
-	switch (src_char) {
-	case SFM_COLON:
-		*target = ':';
-		break;
-	case SFM_DOUBLEQUOTE:
-		*target = '"';
-		break;
-	case SFM_ASTERISK:
-		*target = '*';
-		break;
-	case SFM_QUESTION:
-		*target = '?';
-		break;
-	case SFM_PIPE:
-		*target = '|';
-		break;
-	case SFM_GRTRTHAN:
-		*target = '>';
-		break;
-	case SFM_LESSTHAN:
-		*target = '<';
-		break;
-	case SFM_SPACE:
-		*target = ' ';
-		break;
-	case SFM_PERIOD:
-		*target = '.';
-		break;
-	default:
-		return false;
-	}
-	return true;
-}
-
-
-/*
- * cifs_mapchar - convert a host-endian char to proper char in codepage
- * @target - where converted character should be copied
- * @src_char - 2 byte host-endian source character
- * @cp - codepage to which character should be converted
- * @map_type - How should the 7 NTFS/SMB reserved characters be mapped to UCS2?
- *
- * This function handles the conversion of a single character. It is the
- * responsibility of the caller to ensure that the target buffer is large
- * enough to hold the result of the conversion (at least NLS_MAX_CHARSET_SIZE).
- */
-static int
-cifs_mapchar(char *target, const __u16 *from, const struct nls_table *cp,
-	     int maptype)
-{
-	int len = 1;
-	__u16 src_char;
-
-	src_char = *from;
-
-	if ((maptype == SFM_MAP_UNI_RSVD) && convert_sfm_char(src_char, target))
-		return len;
-	else if ((maptype == SFU_MAP_UNI_RSVD) &&
-		  convert_sfu_char(src_char, target))
-		return len;
-
-	/* if character not one of seven in special remap set */
-	len = cp->uni2char(src_char, target, NLS_MAX_CHARSET_SIZE);
-	if (len <= 0)
-		goto surrogate_pair;
-
-	return len;
-
-surrogate_pair:
-	/* convert SURROGATE_PAIR and IVS */
-	if (strcmp(cp->charset, "utf8"))
-		goto unknown;
-	len = utf16s_to_utf8s(from, 3, UTF16_LITTLE_ENDIAN, target, 6);
-	if (len <= 0)
-		goto unknown;
-	return len;
-
-unknown:
-	*target = '?';
-	len = 1;
-	return len;
-}
-
-/*
- * cifs_from_utf16 - convert utf16le string to local charset
- * @to - destination buffer
- * @from - source buffer
- * @tolen - destination buffer size (in bytes)
- * @fromlen - source buffer size (in bytes)
- * @codepage - codepage to which characters should be converted
- * @mapchar - should characters be remapped according to the mapchars option?
- *
- * Convert a little-endian utf16le string (as sent by the server) to a string
- * in the provided codepage. The tolen and fromlen parameters are to ensure
- * that the code doesn't walk off of the end of the buffer (which is always
- * a danger if the alignment of the source buffer is off). The destination
- * string is always properly null terminated and fits in the destination
- * buffer. Returns the length of the destination string in bytes (including
- * null terminator).
- *
- * Note that some windows versions actually send multiword UTF-16 characters
- * instead of straight UTF16-2. The linux nls routines however aren't able to
- * deal with those characters properly. In the event that we get some of
- * those characters, they won't be translated properly.
- */
-int
-cifs_from_utf16(char *to, const __le16 *from, int tolen, int fromlen,
-		const struct nls_table *codepage, int map_type)
-{
-	int i, charlen, safelen;
-	int outlen = 0;
-	int nullsize = nls_nullsize(codepage);
-	int fromwords = fromlen / 2;
-	char tmp[NLS_MAX_CHARSET_SIZE];
-	__u16 ftmp[3];		/* ftmp[3] = 3array x 2bytes = 6bytes UTF-16 */
-
-	/*
-	 * because the chars can be of varying widths, we need to take care
-	 * not to overflow the destination buffer when we get close to the
-	 * end of it. Until we get to this offset, we don't need to check
-	 * for overflow however.
-	 */
-	safelen = tolen - (NLS_MAX_CHARSET_SIZE + nullsize);
-
-	for (i = 0; i < fromwords; i++) {
-		ftmp[0] = get_unaligned_le16(&from[i]);
-		if (ftmp[0] == 0)
-			break;
-		if (i + 1 < fromwords)
-			ftmp[1] = get_unaligned_le16(&from[i + 1]);
-		else
-			ftmp[1] = 0;
-		if (i + 2 < fromwords)
-			ftmp[2] = get_unaligned_le16(&from[i + 2]);
-		else
-			ftmp[2] = 0;
-
-		/*
-		 * check to see if converting this character might make the
-		 * conversion bleed into the null terminator
-		 */
-		if (outlen >= safelen) {
-			charlen = cifs_mapchar(tmp, ftmp, codepage, map_type);
-			if ((outlen + charlen) > (tolen - nullsize))
-				break;
-		}
-
-		/* put converted char into 'to' buffer */
-		charlen = cifs_mapchar(&to[outlen], ftmp, codepage, map_type);
-		outlen += charlen;
-
-		/* charlen (=bytes of UTF-8 for 1 character)
-		 * 4bytes UTF-8(surrogate pair) is charlen=4
-		 *   (4bytes UTF-16 code)
-		 * 7-8bytes UTF-8(IVS) is charlen=3+4 or 4+4
-		 *   (2 UTF-8 pairs divided to 2 UTF-16 pairs) */
-		if (charlen == 4)
-			i++;
-		else if (charlen >= 5)
-			/* 5-6bytes UTF-8 */
-			i += 2;
-	}
-
-	/* properly null-terminate string */
-	for (i = 0; i < nullsize; i++)
-		to[outlen++] = 0;
-
-	return outlen;
-}
-
-/*
- * NAME:	cifs_strtoUTF16()
- *
- * FUNCTION:	Convert character string to unicode string
- *
- */
-int
-cifs_strtoUTF16(__le16 *to, const char *from, int len,
-	      const struct nls_table *codepage)
-{
-	int charlen;
-	int i;
-	wchar_t wchar_to; /* needed to quiet sparse */
-
-	/* special case for utf8 to handle no plane0 chars */
-	if (!strcmp(codepage->charset, "utf8")) {
-		/*
-		 * convert utf8 -> utf16, we assume we have enough space
-		 * as caller should have assumed conversion does not overflow
-		 * in destination len is length in wchar_t units (16bits)
-		 */
-		i  = utf8s_to_utf16s(from, len, UTF16_LITTLE_ENDIAN,
-				       (wchar_t *) to, len);
-
-		/* if success terminate and exit */
-		if (i >= 0)
-			goto success;
-		/*
-		 * if fails fall back to UCS encoding as this
-		 * function should not return negative values
-		 * currently can fail only if source contains
-		 * invalid encoded characters
-		 */
-	}
-
-	for (i = 0; len && *from; i++, from += charlen, len -= charlen) {
-		charlen = codepage->char2uni(from, len, &wchar_to);
-		if (charlen < 1) {
-			cifs_dbg(VFS, "strtoUTF16: char2uni of 0x%x returned %d\n",
-				 *from, charlen);
-			/* A question mark */
-			wchar_to = 0x003f;
-			charlen = 1;
-		}
-		put_unaligned_le16(wchar_to, &to[i]);
-	}
-
-success:
-	put_unaligned_le16(0, &to[i]);
-	return i;
-}
-
-/*
- * cifs_utf16_bytes - how long will a string be after conversion?
- * @utf16 - pointer to input string
- * @maxbytes - don't go past this many bytes of input string
- * @codepage - destination codepage
- *
- * Walk a utf16le string and return the number of bytes that the string will
- * be after being converted to the given charset, not including any null
- * termination required. Don't walk past maxbytes in the source buffer.
- */
-int
-cifs_utf16_bytes(const __le16 *from, int maxbytes,
-		const struct nls_table *codepage)
-{
-	int i;
-	int charlen, outlen = 0;
-	int maxwords = maxbytes / 2;
-	char tmp[NLS_MAX_CHARSET_SIZE];
-	__u16 ftmp[3];
-
-	for (i = 0; i < maxwords; i++) {
-		ftmp[0] = get_unaligned_le16(&from[i]);
-		if (ftmp[0] == 0)
-			break;
-		if (i + 1 < maxwords)
-			ftmp[1] = get_unaligned_le16(&from[i + 1]);
-		else
-			ftmp[1] = 0;
-		if (i + 2 < maxwords)
-			ftmp[2] = get_unaligned_le16(&from[i + 2]);
-		else
-			ftmp[2] = 0;
-
-		charlen = cifs_mapchar(tmp, ftmp, codepage, NO_MAP_UNI_RSVD);
-		outlen += charlen;
-	}
-
-	return outlen;
-}
-
-/*
- * cifs_strndup_from_utf16 - copy a string from wire format to the local
- * codepage
- * @src - source string
- * @maxlen - don't walk past this many bytes in the source string
- * @is_unicode - is this a unicode string?
- * @codepage - destination codepage
- *
- * Take a string given by the server, convert it to the local codepage and
- * put it in a new buffer. Returns a pointer to the new string or NULL on
- * error.
- */
-char *
-cifs_strndup_from_utf16(const char *src, const int maxlen,
-			const bool is_unicode, const struct nls_table *codepage)
-{
-	int len;
-	char *dst;
-
-	if (is_unicode) {
-		len = cifs_utf16_bytes((__le16 *) src, maxlen, codepage);
-		len += nls_nullsize(codepage);
-		dst = kmalloc(len, GFP_KERNEL);
-		if (!dst)
-			return NULL;
-		cifs_from_utf16(dst, (__le16 *) src, len, maxlen, codepage,
-				NO_MAP_UNI_RSVD);
-	} else {
-		dst = kstrndup(src, maxlen, GFP_KERNEL);
-	}
-
-	return dst;
-}
-
-static __le16 convert_to_sfu_char(char src_char)
-{
-	__le16 dest_char;
-
-	switch (src_char) {
-	case ':':
-		dest_char = cpu_to_le16(UNI_COLON);
-		break;
-	case '*':
-		dest_char = cpu_to_le16(UNI_ASTERISK);
-		break;
-	case '?':
-		dest_char = cpu_to_le16(UNI_QUESTION);
-		break;
-	case '<':
-		dest_char = cpu_to_le16(UNI_LESSTHAN);
-		break;
-	case '>':
-		dest_char = cpu_to_le16(UNI_GRTRTHAN);
-		break;
-	case '|':
-		dest_char = cpu_to_le16(UNI_PIPE);
-		break;
-	default:
-		dest_char = 0;
-	}
-
-	return dest_char;
-}
-
-static __le16 convert_to_sfm_char(char src_char, bool end_of_string)
-{
-	__le16 dest_char;
-
-	if (src_char >= 0x01 && src_char <= 0x1F) {
-		dest_char = cpu_to_le16(src_char + 0xF000);
-		return dest_char;
-	}
-	switch (src_char) {
-	case ':':
-		dest_char = cpu_to_le16(SFM_COLON);
-		break;
-	case '"':
-		dest_char = cpu_to_le16(SFM_DOUBLEQUOTE);
-		break;
-	case '*':
-		dest_char = cpu_to_le16(SFM_ASTERISK);
-		break;
-	case '?':
-		dest_char = cpu_to_le16(SFM_QUESTION);
-		break;
-	case '<':
-		dest_char = cpu_to_le16(SFM_LESSTHAN);
-		break;
-	case '>':
-		dest_char = cpu_to_le16(SFM_GRTRTHAN);
-		break;
-	case '|':
-		dest_char = cpu_to_le16(SFM_PIPE);
-		break;
-	case '.':
-		if (end_of_string)
-			dest_char = cpu_to_le16(SFM_PERIOD);
-		else
-			dest_char = 0;
-		break;
-	case ' ':
-		if (end_of_string)
-			dest_char = cpu_to_le16(SFM_SPACE);
-		else
-			dest_char = 0;
-		break;
-	default:
-		dest_char = 0;
-	}
-
-	return dest_char;
-}
-
-/*
- * Convert 16 bit Unicode pathname to wire format from string in current code
- * page. Conversion may involve remapping up the six characters that are
- * only legal in POSIX-like OS (if they are present in the string). Path
- * names are little endian 16 bit Unicode on the wire
- */
-int
-cifsConvertToUTF16(__le16 *target, const char *source, int srclen,
-		 const struct nls_table *cp, int map_chars)
-{
-	int i, charlen;
-	int j = 0;
-	char src_char;
-	__le16 dst_char;
-	wchar_t tmp;
-	wchar_t *wchar_to;	/* UTF-16 */
-	int ret;
-	unicode_t u;
-
-	if (map_chars == NO_MAP_UNI_RSVD)
-		return cifs_strtoUTF16(target, source, PATH_MAX, cp);
-
-	wchar_to = kzalloc(6, GFP_KERNEL);
-
-	for (i = 0; i < srclen; j++) {
-		src_char = source[i];
-		charlen = 1;
-
-		/* check if end of string */
-		if (src_char == 0)
-			goto ctoUTF16_out;
-
-		/* see if we must remap this char */
-		if (map_chars == SFU_MAP_UNI_RSVD)
-			dst_char = convert_to_sfu_char(src_char);
-		else if (map_chars == SFM_MAP_UNI_RSVD) {
-			bool end_of_string;
-
-			/**
-			 * Remap spaces and periods found at the end of every
-			 * component of the path. The special cases of '.' and
-			 * '..' do not need to be dealt with explicitly because
-			 * they are addressed in namei.c:link_path_walk().
-			 **/
-			if ((i == srclen - 1) || (source[i+1] == '\\'))
-				end_of_string = true;
-			else
-				end_of_string = false;
-
-			dst_char = convert_to_sfm_char(src_char, end_of_string);
-		} else
-			dst_char = 0;
-		/*
-		 * FIXME: We can not handle remapping backslash (UNI_SLASH)
-		 * until all the calls to build_path_from_dentry are modified,
-		 * as they use backslash as separator.
-		 */
-		if (dst_char == 0) {
-			charlen = cp->char2uni(source + i, srclen - i, &tmp);
-			dst_char = cpu_to_le16(tmp);
-
-			/*
-			 * if no match, use question mark, which at least in
-			 * some cases serves as wild card
-			 */
-			if (charlen > 0)
-				goto ctoUTF16;
-
-			/* convert SURROGATE_PAIR */
-			if (strcmp(cp->charset, "utf8") || !wchar_to)
-				goto unknown;
-			if (*(source + i) & 0x80) {
-				charlen = utf8_to_utf32(source + i, 6, &u);
-				if (charlen < 0)
-					goto unknown;
-			} else
-				goto unknown;
-			ret  = utf8s_to_utf16s(source + i, charlen,
-					       UTF16_LITTLE_ENDIAN,
-					       wchar_to, 6);
-			if (ret < 0)
-				goto unknown;
-
-			i += charlen;
-			dst_char = cpu_to_le16(*wchar_to);
-			if (charlen <= 3)
-				/* 1-3bytes UTF-8 to 2bytes UTF-16 */
-				put_unaligned(dst_char, &target[j]);
-			else if (charlen == 4) {
-				/* 4bytes UTF-8(surrogate pair) to 4bytes UTF-16
-				 * 7-8bytes UTF-8(IVS) divided to 2 UTF-16
-				 *   (charlen=3+4 or 4+4) */
-				put_unaligned(dst_char, &target[j]);
-				dst_char = cpu_to_le16(*(wchar_to + 1));
-				j++;
-				put_unaligned(dst_char, &target[j]);
-			} else if (charlen >= 5) {
-				/* 5-6bytes UTF-8 to 6bytes UTF-16 */
-				put_unaligned(dst_char, &target[j]);
-				dst_char = cpu_to_le16(*(wchar_to + 1));
-				j++;
-				put_unaligned(dst_char, &target[j]);
-				dst_char = cpu_to_le16(*(wchar_to + 2));
-				j++;
-				put_unaligned(dst_char, &target[j]);
-			}
-			continue;
-
-unknown:
-			dst_char = cpu_to_le16(0x003f);
-			charlen = 1;
-		}
-
-ctoUTF16:
-		/*
-		 * character may take more than one byte in the source string,
-		 * but will take exactly two bytes in the target string
-		 */
-		i += charlen;
-		put_unaligned(dst_char, &target[j]);
-	}
-
-ctoUTF16_out:
-	put_unaligned(0, &target[j]); /* Null terminate target unicode string */
-	kfree(wchar_to);
-	return j;
-}
-
-/*
- * cifs_local_to_utf16_bytes - how long will a string be after conversion?
- * @from - pointer to input string
- * @maxbytes - don't go past this many bytes of input string
- * @codepage - source codepage
- *
- * Walk a string and return the number of bytes that the string will
- * be after being converted to the given charset, not including any null
- * termination required. Don't walk past maxbytes in the source buffer.
- */
-
-static int
-cifs_local_to_utf16_bytes(const char *from, int len,
-			  const struct nls_table *codepage)
-{
-	int charlen;
-	int i;
-	wchar_t wchar_to;
-
-	for (i = 0; len && *from; i++, from += charlen, len -= charlen) {
-		charlen = codepage->char2uni(from, len, &wchar_to);
-		/* Failed conversion defaults to a question mark */
-		if (charlen < 1)
-			charlen = 1;
-	}
-	return 2 * i; /* UTF16 characters are two bytes */
-}
-
-/*
- * cifs_strndup_to_utf16 - copy a string to wire format from the local codepage
- * @src - source string
- * @maxlen - don't walk past this many bytes in the source string
- * @utf16_len - the length of the allocated string in bytes (including null)
- * @cp - source codepage
- * @remap - map special chars
- *
- * Take a string convert it from the local codepage to UTF16 and
- * put it in a new buffer. Returns a pointer to the new string or NULL on
- * error.
- */
-__le16 *
-cifs_strndup_to_utf16(const char *src, const int maxlen, int *utf16_len,
-		      const struct nls_table *cp, int remap)
-{
-	int len;
-	__le16 *dst;
-
-	len = cifs_local_to_utf16_bytes(src, maxlen, cp);
-	len += 2; /* NULL */
-	dst = kmalloc(len, GFP_KERNEL);
-	if (!dst) {
-		*utf16_len = 0;
-		return NULL;
-	}
-	cifsConvertToUTF16(dst, src, strlen(src), cp, remap);
-	*utf16_len = len;
-	return dst;
-}