smb: move MAX_CIFS_SMALL_BUFFER_SIZE to common/smbglob.h

In order to maintain the code more easily, move duplicate definitions to
common header file.

By the way, add the copyright and author information for Namjae to
common/smbglob.h.

Signed-off-by: ChenXiaoSong <chenxiaosong@kylinos.cn>
Acked-by: Namjae Jeon <linkinjeon@kernel.org>
Signed-off-by: Steve French <stfrench@microsoft.com>

Author: ChenXiaoSong

fs/smb/client/cifspdu.h

@@ -86,7 +86,6 @@
 #define NT_TRANSACT_GET_USER_QUOTA    0x07
 #define NT_TRANSACT_SET_USER_QUOTA    0x08
 
-#define MAX_CIFS_SMALL_BUFFER_SIZE 448 /* big enough for most */
 /* future chained NTCreateXReadX bigger, but for time being NTCreateX biggest */
 /* among the requests (NTCreateX response is bigger with wct of 34) */
 #define MAX_CIFS_HDR_SIZE 0x58 /* 4 len + 32 hdr + (2*24 wct) + 2 bct + 2 pad */

fs/smb/common/smbglob.h

@@ -2,8 +2,10 @@
 /*
  *
  *   Copyright (C) International Business Machines  Corp., 2002,2008
+ *                 2018 Samsung Electronics Co., Ltd.
  *   Author(s): Steve French (sfrench@us.ibm.com)
  *              Jeremy Allison (jra@samba.org)
+ *              Namjae Jeon (linkinjeon@kernel.org)
  *
  */
 #ifndef _COMMON_SMB_GLOB_H
@@ -65,4 +67,6 @@ static inline void inc_rfc1001_len(void *buf, int count)
 
 #define CIFS_DEFAULT_IOSIZE (1024 * 1024)
 
+#define MAX_CIFS_SMALL_BUFFER_SIZE 448 /* big enough for most */
+
 #endif	/* _COMMON_SMB_GLOB_H */

fs/smb/server/smb_common.h

@@ -29,8 +29,6 @@
 
 #define SMB_ECHO_INTERVAL	(60 * HZ)
 
-#define MAX_CIFS_SMALL_BUFFER_SIZE 448 /* big enough for most */
-
 #define MAX_STREAM_PROT_LEN	0x00FFFFFF
 
 /* Responses when opening a file. */