path: root/fs/dlm/config.c

/******************************************************************************
*******************************************************************************
**
**  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
**  Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
**
**  This copyrighted material is made available to anyone wishing to use,
**  modify, copy, or redistribute it subject to the terms and conditions
**  of the GNU General Public License v.2.
**
*******************************************************************************
******************************************************************************/

#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/configfs.h>
#include <linux/in.h>
#include <linux/in6.h>
#include <net/ipv6.h>
#include <net/sock.h>

#include "config.h"
#include "lowcomms.h"

/*
 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid
 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight
 * /config/dlm/<cluster>/comms/<comm>/nodeid
 * /config/dlm/<cluster>/comms/<comm>/local
 * /config/dlm/<cluster>/comms/<comm>/addr
 * The <cluster> level is useless, but I haven't figured out how to avoid it.
 */

static struct config_group *space_list;
static struct config_group *comm_list;
static struct dlm_comm *local_comm;

struct dlm_clusters;
struct dlm_cluster;
struct dlm_spaces;
struct dlm_space;
struct dlm_comms;
struct dlm_comm;
struct dlm_nodes;
struct dlm_node;

static struct config_group *make_cluster(struct config_group *, const char *);
static void drop_cluster(struct config_group *, struct config_item *);
static void release_cluster(struct config_item *);
static struct config_group *make_space(struct config_group *, const char *);
static void drop_space(struct config_group *, struct config_item *);
static void release_space(struct config_item *);
static struct config_item *make_comm(struct config_group *, const char *);
static void drop_comm(struct config_group *, struct config_item *);
static void release_comm(struct config_item *);
static struct config_item *make_node(struct config_group *, const char *);
static void drop_node(struct config_group *, struct config_item *);
static void release_node(struct config_item *);

static ssize_t show_cluster(struct config_item *i, struct configfs_attribute *a,
			    char *buf);
static ssize_t store_cluster(struct config_item *i,
			     struct configfs_attribute *a,
			     const char *buf, size_t len);
static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a,
			 char *buf);
static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a,
			  const char *buf, size_t len);
static ssize_t show_node(struct config_item *i, struct configfs_attribute *a,
			 char *buf);
static ssize_t store_node(struct config_item *i, struct configfs_attribute *a,
			  const char *buf, size_t len);

static ssize_t comm_nodeid_read(struct dlm_comm *cm, char *buf);
static ssize_t comm_nodeid_write(struct dlm_comm *cm, const char *buf,
				size_t len);
static ssize_t comm_local_read(struct dlm_comm *cm, char *buf);
static ssize_t comm_local_write(struct dlm_comm *cm, const char *buf,
				size_t len);
static ssize_t comm_addr_write(struct dlm_comm *cm, const char *buf,
				size_t len);
static ssize_t node_nodeid_read(struct dlm_node *nd, char *buf);
static ssize_t node_nodeid_write(struct dlm_node *nd, const char *buf,
				size_t len);
static ssize_t node_weight_read(struct dlm_node *nd, char *buf);
static ssize_t node_weight_write(struct dlm_node *nd, const char *buf,
				size_t len);

struct dlm_cluster {
	struct config_group group;
	unsigned int cl_tcp_port;
	unsigned int cl_buffer_size;
	unsigned int cl_rsbtbl_size;
	unsigned int cl_lkbtbl_size;
	unsigned int cl_dirtbl_size;
	unsigned int cl_recover_timer;
	unsigned int cl_toss_secs;
	unsigned int cl_scan_secs;
	unsigned int cl_log_debug;
	unsigned int cl_protocol;
	unsigned int cl_timewarn_cs;
};

enum {
	CLUSTER_ATTR_TCP_PORT = 0,
	CLUSTER_ATTR_BUFFER_SIZE,
	CLUSTER_ATTR_RSBTBL_SIZE,
	CLUSTER_ATTR_LKBTBL_SIZE,
	CLUSTER_ATTR_DIRTBL_SIZE