smb: move get_rfc1002_len() to common/smbglob.h

Rename get_rfc1002_length() to get_rfc1002_len(), then move duplicate
definitions to common header file.

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

Author: ZhangGuoDong

fs/smb/client/cifsglob.h

@@ -670,12 +670,6 @@ struct cifs_mnt_data {
 	int flags;
 };
 
-static inline unsigned int
-get_rfc1002_length(void *buf)
-{
-	return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
-}
-
 struct TCP_Server_Info {
 	struct list_head tcp_ses_list;
 	struct list_head smb_ses_list;

fs/smb/client/cifssmb.c

@@ -614,7 +614,7 @@ CIFSSMBEcho(struct TCP_Server_Info *server)
 
 	iov[0].iov_len = 4;
 	iov[0].iov_base = smb;
-	iov[1].iov_len = get_rfc1002_length(smb);
+	iov[1].iov_len = get_rfc1002_len(smb);
 	iov[1].iov_base = (char *)smb + 4;
 
 	rc = cifs_call_async(server, &rqst, NULL, cifs_echo_callback, NULL,
@@ -1458,7 +1458,7 @@ cifs_async_readv(struct cifs_io_subrequest *rdata)
 	rdata->iov[0].iov_base = smb;
 	rdata->iov[0].iov_len = 4;
 	rdata->iov[1].iov_base = (char *)smb + 4;
-	rdata->iov[1].iov_len = get_rfc1002_length(smb);
+	rdata->iov[1].iov_len = get_rfc1002_len(smb);
 
 	trace_smb3_read_enter(rdata->rreq->debug_id,
 			      rdata->subreq.debug_index,
@@ -1830,7 +1830,7 @@ cifs_async_writev(struct cifs_io_subrequest *wdata)
 	/* 4 for RFC1001 length + 1 for BCC */
 	iov[0].iov_len = 4;
 	iov[0].iov_base = smb;
-	iov[1].iov_len = get_rfc1002_length(smb) + 1;
+	iov[1].iov_len = get_rfc1002_len(smb) + 1;
 	iov[1].iov_base = (char *)smb + 4;
 
 	rqst.rq_iov = iov;

fs/smb/client/cifstransport.c

@@ -165,7 +165,7 @@ SendReceiveNoRsp(const unsigned int xid, struct cifs_ses *ses,
 	int resp_buf_type;
 
 	iov[0].iov_base = in_buf;
-	iov[0].iov_len = get_rfc1002_length(in_buf) + 4;
+	iov[0].iov_len = get_rfc1002_len(in_buf) + 4;
 	flags |= CIFS_NO_RSP_BUF;
 	rc = SendReceive2(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov);
 	cifs_dbg(NOISY, "SendRcvNoRsp flags %d rc %d\n", flags, rc);
@@ -177,7 +177,7 @@ int
 cifs_check_receive(struct mid_q_entry *mid, struct TCP_Server_Info *server,
 		   bool log_error)
 {
-	unsigned int len = get_rfc1002_length(mid->resp_buf) + 4;
+	unsigned int len = get_rfc1002_len(mid->resp_buf) + 4;
 
 	dump_smb(mid->resp_buf, min_t(u32, 92, len));
 
@@ -370,7 +370,7 @@ SendReceive(const unsigned int xid, struct cifs_ses *ses,
 		goto out;
 	}
 
-	*pbytes_returned = get_rfc1002_length(midQ->resp_buf);
+	*pbytes_returned = get_rfc1002_len(midQ->resp_buf);
 	memcpy(out_buf, midQ->resp_buf, *pbytes_returned + 4);
 	rc = cifs_check_receive(midQ, server, 0);
 out:
@@ -554,7 +554,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon,
 		goto out;
 	}
 
-	*pbytes_returned = get_rfc1002_length(midQ->resp_buf);
+	*pbytes_returned = get_rfc1002_len(midQ->resp_buf);
 	memcpy(out_buf, midQ->resp_buf, *pbytes_returned + 4);
 	rc = cifs_check_receive(midQ, server, 0);
 out:

fs/smb/client/connect.c

@@ -1295,7 +1295,7 @@ cifs_demultiplex_thread(void *p)
 		 * The right amount was read from socket - 4 bytes,
 		 * so we can now interpret the length field.
 		 */
-		pdu_length = get_rfc1002_length(buf);
+		pdu_length = get_rfc1002_len(buf);
 
 		cifs_dbg(FYI, "RFC1002 header 0x%x\n", pdu_length);
 		if (!is_smb_response(server, buf[0]))

fs/smb/common/smbglob.h

@@ -40,6 +40,11 @@ struct smb_version_values {
 	size_t		create_posix_size;
 };
 
+static inline unsigned int get_rfc1002_len(void *buf)
+{
+	return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
+}
+
 static inline void inc_rfc1001_len(void *buf, int count)
 {
 	be32_add_cpu((__be32 *)buf, count);

fs/smb/server/smb_common.h

@@ -423,9 +423,4 @@ unsigned int ksmbd_server_side_copy_max_chunk_size(void);
 unsigned int ksmbd_server_side_copy_max_total_size(void);
 bool is_asterisk(char *p);
 __le32 smb_map_generic_desired_access(__le32 daccess);
-
-static inline unsigned int get_rfc1002_len(void *buf)
-{
-	return be32_to_cpu(*((__be32 *)buf)) & 0xffffff;
-}
 #endif /* __SMB_COMMON_H__ */