cifs: change mkdir to use a compound

This with the previous patch changes mkdir() from needing 6 roundtrips to
just 3.
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>

fs/cifs/smb2inode.c

@@ -105,6 +105,12 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
 		smb2_set_next_command(server, &rqst[num_rqst]);
 		smb2_set_related(&rqst[num_rqst++]);
 		break;
+	case SMB2_OP_MKDIR:
+		/*
+		 * Directories are created through parameters in the
+		 * SMB2_open() call.
+		 */
+		break;
 	default:
 		cifs_dbg(VFS, "Invalid command\n");
 		rc = -EINVAL;
@@ -142,6 +148,10 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
 		if (rqst[2].rq_iov)
 			SMB2_close_free(&rqst[2]);
 		break;
+	case SMB2_OP_MKDIR:
+		if (rqst[1].rq_iov)
+			SMB2_close_free(&rqst[1]);
+		break;
 	}
 	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
@@ -194,12 +204,6 @@ smb2_open_op_close(const unsigned int xid, struct cifs_tcon *tcon,
 	switch (command) {
 	case SMB2_OP_DELETE:
 		break;
-	case SMB2_OP_MKDIR:
-		/*
-		 * Directories are created through parameters in the
-		 * SMB2_open() call.
-		 */
-		break;
 	case SMB2_OP_RMDIR:
 		tmprc = SMB2_rmdir(xid, tcon, fid.persistent_fid,
 				   fid.volatile_fid);
@@ -287,7 +291,7 @@ int
 smb2_mkdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 	   struct cifs_sb_info *cifs_sb)
 {
-	return smb2_open_op_close(xid, tcon, cifs_sb, name,
+	return smb2_compound_op(xid, tcon, cifs_sb, name,
 				FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 				CREATE_NOT_FILE, NULL, SMB2_OP_MKDIR);
 }