788 lines
18 KiB
C
788 lines
18 KiB
C
/******************************************************************************
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*******************************************************************************
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**
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** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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** Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
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**
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** This copyrighted material is made available to anyone wishing to use,
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** modify, copy, or redistribute it subject to the terms and conditions
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** of the GNU General Public License v.2.
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**
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*******************************************************************************
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******************************************************************************/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/configfs.h>
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#include <net/sock.h>
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#include "config.h"
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/*
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* /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid
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* /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight
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* /config/dlm/<cluster>/comms/<comm>/nodeid
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* /config/dlm/<cluster>/comms/<comm>/local
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* /config/dlm/<cluster>/comms/<comm>/addr
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* The <cluster> level is useless, but I haven't figured out how to avoid it.
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*/
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static struct config_group *space_list;
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static struct config_group *comm_list;
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static struct comm *local_comm;
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struct clusters;
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struct cluster;
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struct spaces;
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struct space;
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struct comms;
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struct comm;
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struct nodes;
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struct node;
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static struct config_group *make_cluster(struct config_group *, const char *);
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static void drop_cluster(struct config_group *, struct config_item *);
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static void release_cluster(struct config_item *);
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static struct config_group *make_space(struct config_group *, const char *);
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static void drop_space(struct config_group *, struct config_item *);
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static void release_space(struct config_item *);
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static struct config_item *make_comm(struct config_group *, const char *);
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static void drop_comm(struct config_group *, struct config_item *);
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static void release_comm(struct config_item *);
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static struct config_item *make_node(struct config_group *, const char *);
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static void drop_node(struct config_group *, struct config_item *);
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static void release_node(struct config_item *);
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static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a,
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char *buf);
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static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a,
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const char *buf, size_t len);
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static ssize_t show_node(struct config_item *i, struct configfs_attribute *a,
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char *buf);
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static ssize_t store_node(struct config_item *i, struct configfs_attribute *a,
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const char *buf, size_t len);
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static ssize_t comm_nodeid_read(struct comm *cm, char *buf);
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static ssize_t comm_nodeid_write(struct comm *cm, const char *buf, size_t len);
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static ssize_t comm_local_read(struct comm *cm, char *buf);
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static ssize_t comm_local_write(struct comm *cm, const char *buf, size_t len);
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static ssize_t comm_addr_write(struct comm *cm, const char *buf, size_t len);
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static ssize_t node_nodeid_read(struct node *nd, char *buf);
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static ssize_t node_nodeid_write(struct node *nd, const char *buf, size_t len);
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static ssize_t node_weight_read(struct node *nd, char *buf);
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static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len);
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enum {
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COMM_ATTR_NODEID = 0,
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COMM_ATTR_LOCAL,
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COMM_ATTR_ADDR,
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};
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struct comm_attribute {
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struct configfs_attribute attr;
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ssize_t (*show)(struct comm *, char *);
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ssize_t (*store)(struct comm *, const char *, size_t);
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};
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static struct comm_attribute comm_attr_nodeid = {
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.attr = { .ca_owner = THIS_MODULE,
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.ca_name = "nodeid",
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.ca_mode = S_IRUGO | S_IWUSR },
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.show = comm_nodeid_read,
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.store = comm_nodeid_write,
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};
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static struct comm_attribute comm_attr_local = {
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.attr = { .ca_owner = THIS_MODULE,
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.ca_name = "local",
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.ca_mode = S_IRUGO | S_IWUSR },
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.show = comm_local_read,
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.store = comm_local_write,
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};
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static struct comm_attribute comm_attr_addr = {
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.attr = { .ca_owner = THIS_MODULE,
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.ca_name = "addr",
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.ca_mode = S_IRUGO | S_IWUSR },
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.store = comm_addr_write,
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};
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static struct configfs_attribute *comm_attrs[] = {
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[COMM_ATTR_NODEID] = &comm_attr_nodeid.attr,
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[COMM_ATTR_LOCAL] = &comm_attr_local.attr,
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[COMM_ATTR_ADDR] = &comm_attr_addr.attr,
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NULL,
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};
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enum {
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NODE_ATTR_NODEID = 0,
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NODE_ATTR_WEIGHT,
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};
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struct node_attribute {
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struct configfs_attribute attr;
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ssize_t (*show)(struct node *, char *);
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ssize_t (*store)(struct node *, const char *, size_t);
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};
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static struct node_attribute node_attr_nodeid = {
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.attr = { .ca_owner = THIS_MODULE,
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.ca_name = "nodeid",
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.ca_mode = S_IRUGO | S_IWUSR },
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.show = node_nodeid_read,
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.store = node_nodeid_write,
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};
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static struct node_attribute node_attr_weight = {
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.attr = { .ca_owner = THIS_MODULE,
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.ca_name = "weight",
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.ca_mode = S_IRUGO | S_IWUSR },
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.show = node_weight_read,
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.store = node_weight_write,
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};
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static struct configfs_attribute *node_attrs[] = {
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[NODE_ATTR_NODEID] = &node_attr_nodeid.attr,
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[NODE_ATTR_WEIGHT] = &node_attr_weight.attr,
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NULL,
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};
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struct clusters {
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struct configfs_subsystem subsys;
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};
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struct cluster {
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struct config_group group;
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};
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struct spaces {
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struct config_group ss_group;
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};
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struct space {
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struct config_group group;
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struct list_head members;
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struct mutex members_lock;
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int members_count;
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};
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struct comms {
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struct config_group cs_group;
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};
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struct comm {
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struct config_item item;
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int nodeid;
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int local;
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int addr_count;
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struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT];
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};
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struct nodes {
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struct config_group ns_group;
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};
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struct node {
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struct config_item item;
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struct list_head list; /* space->members */
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int nodeid;
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int weight;
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};
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static struct configfs_group_operations clusters_ops = {
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.make_group = make_cluster,
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.drop_item = drop_cluster,
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};
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static struct configfs_item_operations cluster_ops = {
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.release = release_cluster,
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};
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static struct configfs_group_operations spaces_ops = {
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.make_group = make_space,
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.drop_item = drop_space,
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};
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static struct configfs_item_operations space_ops = {
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.release = release_space,
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};
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static struct configfs_group_operations comms_ops = {
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.make_item = make_comm,
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.drop_item = drop_comm,
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};
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static struct configfs_item_operations comm_ops = {
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.release = release_comm,
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.show_attribute = show_comm,
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.store_attribute = store_comm,
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};
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static struct configfs_group_operations nodes_ops = {
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.make_item = make_node,
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.drop_item = drop_node,
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};
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static struct configfs_item_operations node_ops = {
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.release = release_node,
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.show_attribute = show_node,
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.store_attribute = store_node,
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};
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static struct config_item_type clusters_type = {
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.ct_group_ops = &clusters_ops,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type cluster_type = {
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.ct_item_ops = &cluster_ops,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type spaces_type = {
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.ct_group_ops = &spaces_ops,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type space_type = {
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.ct_item_ops = &space_ops,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type comms_type = {
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.ct_group_ops = &comms_ops,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type comm_type = {
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.ct_item_ops = &comm_ops,
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.ct_attrs = comm_attrs,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type nodes_type = {
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.ct_group_ops = &nodes_ops,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type node_type = {
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.ct_item_ops = &node_ops,
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.ct_attrs = node_attrs,
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.ct_owner = THIS_MODULE,
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};
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static struct cluster *to_cluster(struct config_item *i)
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{
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return i ? container_of(to_config_group(i), struct cluster, group):NULL;
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}
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static struct space *to_space(struct config_item *i)
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{
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return i ? container_of(to_config_group(i), struct space, group) : NULL;
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}
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static struct comm *to_comm(struct config_item *i)
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{
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return i ? container_of(i, struct comm, item) : NULL;
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}
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static struct node *to_node(struct config_item *i)
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{
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return i ? container_of(i, struct node, item) : NULL;
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}
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static struct config_group *make_cluster(struct config_group *g,
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const char *name)
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{
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struct cluster *cl = NULL;
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struct spaces *sps = NULL;
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struct comms *cms = NULL;
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void *gps = NULL;
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cl = kzalloc(sizeof(struct cluster), GFP_KERNEL);
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gps = kcalloc(3, sizeof(struct config_group *), GFP_KERNEL);
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sps = kzalloc(sizeof(struct spaces), GFP_KERNEL);
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cms = kzalloc(sizeof(struct comms), GFP_KERNEL);
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if (!cl || !gps || !sps || !cms)
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goto fail;
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config_group_init_type_name(&cl->group, name, &cluster_type);
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config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type);
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config_group_init_type_name(&cms->cs_group, "comms", &comms_type);
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cl->group.default_groups = gps;
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cl->group.default_groups[0] = &sps->ss_group;
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cl->group.default_groups[1] = &cms->cs_group;
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cl->group.default_groups[2] = NULL;
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space_list = &sps->ss_group;
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comm_list = &cms->cs_group;
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return &cl->group;
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fail:
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kfree(cl);
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kfree(gps);
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kfree(sps);
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kfree(cms);
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return NULL;
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}
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static void drop_cluster(struct config_group *g, struct config_item *i)
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{
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struct cluster *cl = to_cluster(i);
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struct config_item *tmp;
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int j;
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for (j = 0; cl->group.default_groups[j]; j++) {
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tmp = &cl->group.default_groups[j]->cg_item;
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cl->group.default_groups[j] = NULL;
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config_item_put(tmp);
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}
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space_list = NULL;
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comm_list = NULL;
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config_item_put(i);
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}
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static void release_cluster(struct config_item *i)
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{
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struct cluster *cl = to_cluster(i);
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kfree(cl->group.default_groups);
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kfree(cl);
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}
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static struct config_group *make_space(struct config_group *g, const char *name)
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{
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struct space *sp = NULL;
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struct nodes *nds = NULL;
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void *gps = NULL;
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sp = kzalloc(sizeof(struct space), GFP_KERNEL);
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gps = kcalloc(2, sizeof(struct config_group *), GFP_KERNEL);
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nds = kzalloc(sizeof(struct nodes), GFP_KERNEL);
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if (!sp || !gps || !nds)
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goto fail;
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config_group_init_type_name(&sp->group, name, &space_type);
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config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type);
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sp->group.default_groups = gps;
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sp->group.default_groups[0] = &nds->ns_group;
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sp->group.default_groups[1] = NULL;
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INIT_LIST_HEAD(&sp->members);
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mutex_init(&sp->members_lock);
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sp->members_count = 0;
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return &sp->group;
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fail:
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kfree(sp);
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kfree(gps);
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kfree(nds);
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return NULL;
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}
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static void drop_space(struct config_group *g, struct config_item *i)
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{
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struct space *sp = to_space(i);
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struct config_item *tmp;
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int j;
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/* assert list_empty(&sp->members) */
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for (j = 0; sp->group.default_groups[j]; j++) {
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tmp = &sp->group.default_groups[j]->cg_item;
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sp->group.default_groups[j] = NULL;
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config_item_put(tmp);
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}
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config_item_put(i);
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}
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static void release_space(struct config_item *i)
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{
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struct space *sp = to_space(i);
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kfree(sp->group.default_groups);
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kfree(sp);
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}
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static struct config_item *make_comm(struct config_group *g, const char *name)
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{
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struct comm *cm;
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cm = kzalloc(sizeof(struct comm), GFP_KERNEL);
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if (!cm)
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return NULL;
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config_item_init_type_name(&cm->item, name, &comm_type);
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cm->nodeid = -1;
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cm->local = 0;
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cm->addr_count = 0;
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return &cm->item;
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}
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static void drop_comm(struct config_group *g, struct config_item *i)
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{
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struct comm *cm = to_comm(i);
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if (local_comm == cm)
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local_comm = NULL;
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while (cm->addr_count--)
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kfree(cm->addr[cm->addr_count]);
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config_item_put(i);
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}
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static void release_comm(struct config_item *i)
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{
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struct comm *cm = to_comm(i);
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kfree(cm);
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}
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static struct config_item *make_node(struct config_group *g, const char *name)
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{
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struct space *sp = to_space(g->cg_item.ci_parent);
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struct node *nd;
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nd = kzalloc(sizeof(struct node), GFP_KERNEL);
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if (!nd)
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return NULL;
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config_item_init_type_name(&nd->item, name, &node_type);
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nd->nodeid = -1;
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nd->weight = 1; /* default weight of 1 if none is set */
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mutex_lock(&sp->members_lock);
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list_add(&nd->list, &sp->members);
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sp->members_count++;
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mutex_unlock(&sp->members_lock);
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return &nd->item;
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}
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|
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static void drop_node(struct config_group *g, struct config_item *i)
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{
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struct space *sp = to_space(g->cg_item.ci_parent);
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struct node *nd = to_node(i);
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mutex_lock(&sp->members_lock);
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list_del(&nd->list);
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sp->members_count--;
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mutex_unlock(&sp->members_lock);
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|
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config_item_put(i);
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}
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|
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static void release_node(struct config_item *i)
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{
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struct node *nd = to_node(i);
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kfree(nd);
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}
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|
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static struct clusters clusters_root = {
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.subsys = {
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.su_group = {
|
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.cg_item = {
|
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.ci_namebuf = "dlm",
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.ci_type = &clusters_type,
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},
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},
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},
|
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};
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|
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int dlm_config_init(void)
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{
|
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config_group_init(&clusters_root.subsys.su_group);
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init_MUTEX(&clusters_root.subsys.su_sem);
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return configfs_register_subsystem(&clusters_root.subsys);
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}
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|
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void dlm_config_exit(void)
|
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{
|
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configfs_unregister_subsystem(&clusters_root.subsys);
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}
|
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|
|
/*
|
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* Functions for user space to read/write attributes
|
|
*/
|
|
|
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static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a,
|
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char *buf)
|
|
{
|
|
struct comm *cm = to_comm(i);
|
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struct comm_attribute *cma =
|
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container_of(a, struct comm_attribute, attr);
|
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return cma->show ? cma->show(cm, buf) : 0;
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}
|
|
|
|
static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a,
|
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const char *buf, size_t len)
|
|
{
|
|
struct comm *cm = to_comm(i);
|
|
struct comm_attribute *cma =
|
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container_of(a, struct comm_attribute, attr);
|
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return cma->store ? cma->store(cm, buf, len) : -EINVAL;
|
|
}
|
|
|
|
static ssize_t comm_nodeid_read(struct comm *cm, char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", cm->nodeid);
|
|
}
|
|
|
|
static ssize_t comm_nodeid_write(struct comm *cm, const char *buf, size_t len)
|
|
{
|
|
cm->nodeid = simple_strtol(buf, NULL, 0);
|
|
return len;
|
|
}
|
|
|
|
static ssize_t comm_local_read(struct comm *cm, char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", cm->local);
|
|
}
|
|
|
|
static ssize_t comm_local_write(struct comm *cm, const char *buf, size_t len)
|
|
{
|
|
cm->local= simple_strtol(buf, NULL, 0);
|
|
if (cm->local && !local_comm)
|
|
local_comm = cm;
|
|
return len;
|
|
}
|
|
|
|
static ssize_t comm_addr_write(struct comm *cm, const char *buf, size_t len)
|
|
{
|
|
struct sockaddr_storage *addr;
|
|
|
|
if (len != sizeof(struct sockaddr_storage))
|
|
return -EINVAL;
|
|
|
|
if (cm->addr_count >= DLM_MAX_ADDR_COUNT)
|
|
return -ENOSPC;
|
|
|
|
addr = kzalloc(sizeof(*addr), GFP_KERNEL);
|
|
if (!addr)
|
|
return -ENOMEM;
|
|
|
|
memcpy(addr, buf, len);
|
|
cm->addr[cm->addr_count++] = addr;
|
|
return len;
|
|
}
|
|
|
|
static ssize_t show_node(struct config_item *i, struct configfs_attribute *a,
|
|
char *buf)
|
|
{
|
|
struct node *nd = to_node(i);
|
|
struct node_attribute *nda =
|
|
container_of(a, struct node_attribute, attr);
|
|
return nda->show ? nda->show(nd, buf) : 0;
|
|
}
|
|
|
|
static ssize_t store_node(struct config_item *i, struct configfs_attribute *a,
|
|
const char *buf, size_t len)
|
|
{
|
|
struct node *nd = to_node(i);
|
|
struct node_attribute *nda =
|
|
container_of(a, struct node_attribute, attr);
|
|
return nda->store ? nda->store(nd, buf, len) : -EINVAL;
|
|
}
|
|
|
|
static ssize_t node_nodeid_read(struct node *nd, char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", nd->nodeid);
|
|
}
|
|
|
|
static ssize_t node_nodeid_write(struct node *nd, const char *buf, size_t len)
|
|
{
|
|
nd->nodeid = simple_strtol(buf, NULL, 0);
|
|
return len;
|
|
}
|
|
|
|
static ssize_t node_weight_read(struct node *nd, char *buf)
|
|
{
|
|
return sprintf(buf, "%d\n", nd->weight);
|
|
}
|
|
|
|
static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len)
|
|
{
|
|
nd->weight = simple_strtol(buf, NULL, 0);
|
|
return len;
|
|
}
|
|
|
|
/*
|
|
* Functions for the dlm to get the info that's been configured
|
|
*/
|
|
|
|
static struct space *get_space(char *name)
|
|
{
|
|
if (!space_list)
|
|
return NULL;
|
|
return to_space(config_group_find_obj(space_list, name));
|
|
}
|
|
|
|
static void put_space(struct space *sp)
|
|
{
|
|
config_item_put(&sp->group.cg_item);
|
|
}
|
|
|
|
static struct comm *get_comm(int nodeid, struct sockaddr_storage *addr)
|
|
{
|
|
struct config_item *i;
|
|
struct comm *cm = NULL;
|
|
int found = 0;
|
|
|
|
if (!comm_list)
|
|
return NULL;
|
|
|
|
down(&clusters_root.subsys.su_sem);
|
|
|
|
list_for_each_entry(i, &comm_list->cg_children, ci_entry) {
|
|
cm = to_comm(i);
|
|
|
|
if (nodeid) {
|
|
if (cm->nodeid != nodeid)
|
|
continue;
|
|
found = 1;
|
|
break;
|
|
} else {
|
|
if (!cm->addr_count ||
|
|
memcmp(cm->addr[0], addr, sizeof(*addr)))
|
|
continue;
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
up(&clusters_root.subsys.su_sem);
|
|
|
|
if (found)
|
|
config_item_get(i);
|
|
else
|
|
cm = NULL;
|
|
return cm;
|
|
}
|
|
|
|
static void put_comm(struct comm *cm)
|
|
{
|
|
config_item_put(&cm->item);
|
|
}
|
|
|
|
/* caller must free mem */
|
|
int dlm_nodeid_list(char *lsname, int **ids_out)
|
|
{
|
|
struct space *sp;
|
|
struct node *nd;
|
|
int i = 0, rv = 0;
|
|
int *ids;
|
|
|
|
sp = get_space(lsname);
|
|
if (!sp)
|
|
return -EEXIST;
|
|
|
|
mutex_lock(&sp->members_lock);
|
|
if (!sp->members_count) {
|
|
rv = 0;
|
|
goto out;
|
|
}
|
|
|
|
ids = kcalloc(sp->members_count, sizeof(int), GFP_KERNEL);
|
|
if (!ids) {
|
|
rv = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
rv = sp->members_count;
|
|
list_for_each_entry(nd, &sp->members, list)
|
|
ids[i++] = nd->nodeid;
|
|
|
|
if (rv != i)
|
|
printk("bad nodeid count %d %d\n", rv, i);
|
|
|
|
*ids_out = ids;
|
|
out:
|
|
mutex_unlock(&sp->members_lock);
|
|
put_space(sp);
|
|
return rv;
|
|
}
|
|
|
|
int dlm_node_weight(char *lsname, int nodeid)
|
|
{
|
|
struct space *sp;
|
|
struct node *nd;
|
|
int w = -EEXIST;
|
|
|
|
sp = get_space(lsname);
|
|
if (!sp)
|
|
goto out;
|
|
|
|
mutex_lock(&sp->members_lock);
|
|
list_for_each_entry(nd, &sp->members, list) {
|
|
if (nd->nodeid != nodeid)
|
|
continue;
|
|
w = nd->weight;
|
|
break;
|
|
}
|
|
mutex_unlock(&sp->members_lock);
|
|
put_space(sp);
|
|
out:
|
|
return w;
|
|
}
|
|
|
|
int dlm_nodeid_to_addr(int nodeid, struct sockaddr_storage *addr)
|
|
{
|
|
struct comm *cm = get_comm(nodeid, NULL);
|
|
if (!cm)
|
|
return -EEXIST;
|
|
if (!cm->addr_count)
|
|
return -ENOENT;
|
|
memcpy(addr, cm->addr[0], sizeof(*addr));
|
|
put_comm(cm);
|
|
return 0;
|
|
}
|
|
|
|
int dlm_addr_to_nodeid(struct sockaddr_storage *addr, int *nodeid)
|
|
{
|
|
struct comm *cm = get_comm(0, addr);
|
|
if (!cm)
|
|
return -EEXIST;
|
|
*nodeid = cm->nodeid;
|
|
put_comm(cm);
|
|
return 0;
|
|
}
|
|
|
|
int dlm_our_nodeid(void)
|
|
{
|
|
return local_comm ? local_comm->nodeid : 0;
|
|
}
|
|
|
|
/* num 0 is first addr, num 1 is second addr */
|
|
int dlm_our_addr(struct sockaddr_storage *addr, int num)
|
|
{
|
|
if (!local_comm)
|
|
return -1;
|
|
if (num + 1 > local_comm->addr_count)
|
|
return -1;
|
|
memcpy(addr, local_comm->addr[num], sizeof(*addr));
|
|
return 0;
|
|
}
|
|
|
|
/* Config file defaults */
|
|
#define DEFAULT_TCP_PORT 21064
|
|
#define DEFAULT_BUFFER_SIZE 4096
|
|
#define DEFAULT_RSBTBL_SIZE 256
|
|
#define DEFAULT_LKBTBL_SIZE 1024
|
|
#define DEFAULT_DIRTBL_SIZE 512
|
|
#define DEFAULT_RECOVER_TIMER 5
|
|
#define DEFAULT_TOSS_SECS 10
|
|
#define DEFAULT_SCAN_SECS 5
|
|
|
|
struct dlm_config_info dlm_config = {
|
|
.tcp_port = DEFAULT_TCP_PORT,
|
|
.buffer_size = DEFAULT_BUFFER_SIZE,
|
|
.rsbtbl_size = DEFAULT_RSBTBL_SIZE,
|
|
.lkbtbl_size = DEFAULT_LKBTBL_SIZE,
|
|
.dirtbl_size = DEFAULT_DIRTBL_SIZE,
|
|
.recover_timer = DEFAULT_RECOVER_TIMER,
|
|
.toss_secs = DEFAULT_TOSS_SECS,
|
|
.scan_secs = DEFAULT_SCAN_SECS
|
|
};
|
|
|