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      1 /*	$NetBSD: locking_types.h,v 1.1.1.2 2009/12/02 00:26:25 haad Exp $	*/
      2 
      3 /*
      4  * Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
      5  * Copyright (C) 2004-2009 Red Hat, Inc. All rights reserved.
      6  *
      7  * This file is part of LVM2.
      8  *
      9  * This copyrighted material is made available to anyone wishing to use,
     10  * modify, copy, or redistribute it subject to the terms and conditions
     11  * of the GNU Lesser General Public License v.2.1.
     12  *
     13  * You should have received a copy of the GNU Lesser General Public License
     14  * along with this program; if not, write to the Free Software Foundation,
     15  * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
     16  */
     17 
     18 #include "metadata.h"
     19 #include "config.h"
     20 
     21 typedef int (*lock_resource_fn) (struct cmd_context * cmd, const char *resource,
     22 				 uint32_t flags);
     23 typedef int (*query_resource_fn) (const char *resource, int *mode);
     24 
     25 typedef void (*fin_lock_fn) (void);
     26 typedef void (*reset_lock_fn) (void);
     27 
     28 #define LCK_PRE_MEMLOCK	0x00000001	/* Is memlock() needed before calls? */
     29 #define LCK_CLUSTERED	0x00000002
     30 
     31 struct locking_type {
     32 	uint32_t flags;
     33 	lock_resource_fn lock_resource;
     34 	query_resource_fn query_resource;
     35 
     36 	reset_lock_fn reset_locking;
     37 	fin_lock_fn fin_locking;
     38 };
     39 
     40 /*
     41  * Locking types
     42  */
     43 int init_no_locking(struct locking_type *locking, struct cmd_context *cmd);
     44 
     45 int init_readonly_locking(struct locking_type *locking, struct cmd_context *cmd);
     46 
     47 int init_file_locking(struct locking_type *locking, struct cmd_context *cmd);
     48 
     49 int init_external_locking(struct locking_type *locking, struct cmd_context *cmd);
     50 
     51 int init_cluster_locking(struct locking_type *locking, struct cmd_context *cmd);
     52