[CIFS] Do not limit the length of share names (was 100 for whole UNC name)

during mount. Especially important for some non-Western languages.
Signed-off-by: Steve French <sfrench@us.ibm.com>

fs/cifs/CHANGES

 Version 1.43
 ------------
 POSIX locking to servers which support CIFS POSIX Extensions
-(disabled by default controlled by proc/fs/cifs/Experimental)
+(disabled by default controlled by proc/fs/cifs/Experimental).
+Handle conversion of long share names (especially Asian languages)
+to Unicode during mount. 
 
 Version 1.42
 ------------

fs/cifs/connect.c

@@ -3282,7 +3282,8 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
 		bcc_ptr++; /* align */
 	}
 
-	if(ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
+	if(ses->server->secMode & 
+			(SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED))
 		smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE;
 
 	if (ses->capabilities & CAP_STATUS32) {
@@ -3294,8 +3295,10 @@ CIFSTCon(unsigned int xid, struct cifsSesInfo *ses,
 	if (ses->capabilities & CAP_UNICODE) {
 		smb_buffer->Flags2 |= SMBFLG2_UNICODE;
 		length =
-		    cifs_strtoUCS((__le16 *) bcc_ptr, tree, 100, nls_codepage);
-		bcc_ptr += 2 * length;	/* convert num of 16 bit words to bytes */
+		    cifs_strtoUCS((__le16 *) bcc_ptr, tree, 
+			6 /* max utf8 char length in bytes */ * 
+			(/* server len*/ + 256 /* share len */), nls_codepage);
+		bcc_ptr += 2 * length;	/* convert num 16 bit words to bytes */
 		bcc_ptr += 2;	/* skip trailing null */
 	} else {		/* ASCII */
 		strcpy(bcc_ptr, tree);