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, 366 deletions

diff --git a/fs/ksmbd/unicode.c b/fs/ksmbd/unicode.c
deleted file mode 100644
index 9ae676906ed3..000000000000
--- a/fs/ksmbd/unicode.c
+++ /dev/null
@@ -1,366 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- *   Some of the source code in this file came from fs/cifs/cifs_unicode.c
- *
- *   Copyright (c) International Business Machines  Corp., 2000,2009
- *   Modified by Steve French (sfrench@us.ibm.com)
- *   Modified by Namjae Jeon (linkinjeon@kernel.org)
- */
-#include <linux/fs.h>
-#include <linux/slab.h>
-#include <asm/unaligned.h>
-#include "glob.h"
-#include "unicode.h"
-#include "uniupr.h"
-#include "smb_common.h"
-
-/*
- * smb_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:	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.
- *
- * Return:	string length after conversion
- */
-static int smb_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;
-
-	for (i = 0; i < maxwords; i++) {
-		ftmp = get_unaligned_le16(&from[i]);
-		if (ftmp == 0)
-			break;
-
-		charlen = codepage->uni2char(ftmp, tmp, NLS_MAX_CHARSET_SIZE);
-		if (charlen > 0)
-			outlen += charlen;
-		else
-			outlen++;
-	}
-
-	return outlen;
-}
-
-/*
- * 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
- * @mapchar:	should character be mapped according to mapchars mount option?
- *
- * 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).
- *
- * Return:	string length after conversion
- */
-static int
-cifs_mapchar(char *target, const __u16 src_char, const struct nls_table *cp,
-	     bool mapchar)
-{
-	int len = 1;
-
-	if (!mapchar)
-		goto cp_convert;
-
-	/*
-	 * 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:
-		goto cp_convert;
-	}
-
-out:
-	return len;
-
-cp_convert:
-	len = cp->uni2char(src_char, target, NLS_MAX_CHARSET_SIZE);
-	if (len <= 0) {
-		*target = '?';
-		len = 1;
-	}
-
-	goto out;
-}
-
-/*
- * smb_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.
- *
- * Return:	string length after conversion
- */
-static int smb_from_utf16(char *to, const __le16 *from, int tolen, int fromlen,
-			  const struct nls_table *codepage, bool mapchar)
-{
-	int i, charlen, safelen;
-	int outlen = 0;
-	int nullsize = nls_nullsize(codepage);
-	int fromwords = fromlen / 2;
-	char tmp[NLS_MAX_CHARSET_SIZE];
-	__u16 ftmp;
-
-	/*
-	 * 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 = get_unaligned_le16(&from[i]);
-		if (ftmp == 0)
-			break;
-
-		/*
-		 * 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, mapchar);
-			if ((outlen + charlen) > (tolen - nullsize))
-				break;
-		}
-
-		/* put converted char into 'to' buffer */
-		charlen = cifs_mapchar(&to[outlen], ftmp, codepage, mapchar);
-		outlen += charlen;
-	}
-
-	/* properly null-terminate string */
-	for (i = 0; i < nullsize; i++)
-		to[outlen++] = 0;
-
-	return outlen;
-}
-
-/*
- * smb_strtoUTF16() - Convert character string to unicode string
- * @to:		destination buffer
- * @from:	source buffer
- * @len:	destination buffer size (in bytes)
- * @codepage:	codepage to which characters should be converted
- *
- * Return:	string length after conversion
- */
-int smb_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 > 0 && *from; i++, from += charlen, len -= charlen) {
-		charlen = codepage->char2uni(from, len, &wchar_to);
-		if (charlen < 1) {
-			/* A question mark */
-			wchar_to = 0x003f;
-			charlen = 1;
-		}
-		put_unaligned_le16(wchar_to, &to[i]);
-	}
-
-success:
-	put_unaligned_le16(0, &to[i]);
-	return i;
-}
-
-/*
- * smb_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.
- *
- * Return:	destination string buffer or error ptr
- */
-char *smb_strndup_from_utf16(const char *src, const int maxlen,
-			     const bool is_unicode,
-			     const struct nls_table *codepage)
-{
-	int len, ret;
-	char *dst;
-
-	if (is_unicode) {
-		len = smb_utf16_bytes((__le16 *)src, maxlen, codepage);
-		len += nls_nullsize(codepage);
-		dst = kmalloc(len, GFP_KERNEL);
-		if (!dst)
-			return ERR_PTR(-ENOMEM);
-		ret = smb_from_utf16(dst, (__le16 *)src, len, maxlen, codepage,
-				     false);
-		if (ret < 0) {
-			kfree(dst);
-			return ERR_PTR(-EINVAL);
-		}
-	} else {
-		len = strnlen(src, maxlen);
-		len++;
-		dst = kmalloc(len, GFP_KERNEL);
-		if (!dst)
-			return ERR_PTR(-ENOMEM);
-		strscpy(dst, src, len);
-	}
-
-	return dst;
-}
-
-/*
- * 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
- */
-/*
- * smbConvertToUTF16() - convert string from local charset to utf16
- * @target:	destination buffer
- * @source:	source buffer
- * @srclen:	source buffer size (in bytes)
- * @cp:		codepage to which characters should be converted
- * @mapchar:	should characters be remapped according to the mapchars option?
- *
- * 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
- *
- * Return:	char length after conversion
- */
-int smbConvertToUTF16(__le16 *target, const char *source, int srclen,
-		      const struct nls_table *cp, int mapchars)
-{
-	int i, j, charlen;
-	char src_char;
-	__le16 dst_char;
-	wchar_t tmp;
-
-	if (!mapchars)
-		return smb_strtoUTF16(target, source, srclen, cp);
-
-	for (i = 0, j = 0; i < srclen; j++) {
-		src_char = source[i];
-		charlen = 1;
-		switch (src_char) {
-		case 0:
-			put_unaligned(0, &target[j]);
-			return j;
-		case ':':
-			dst_char = cpu_to_le16(UNI_COLON);
-			break;
-		case '*':
-			dst_char = cpu_to_le16(UNI_ASTERISK);
-			break;
-		case '?':
-			dst_char = cpu_to_le16(UNI_QUESTION);
-			break;
-		case '<':
-			dst_char = cpu_to_le16(UNI_LESSTHAN);
-			break;
-		case '>':
-			dst_char = cpu_to_le16(UNI_GRTRTHAN);
-			break;
-		case '|':
-			dst_char = cpu_to_le16(UNI_PIPE);
-			break;
-		/*
-		 * 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.
-		 */
-		default:
-			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 < 1) {
-				dst_char = cpu_to_le16(0x003f);
-				charlen = 1;
-			}
-		}
-		/*
-		 * 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]);
-	}
-
-	return j;
-}