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OpenCloudOS-Kernel/fs/ocfs2/cluster/nodemanager.c

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/* -*- mode: c; c-basic-offset: 8; -*-
* vim: noexpandtab sw=8 ts=8 sts=0:
*
* Copyright (C) 2004, 2005 Oracle. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/configfs.h>
#include "tcp.h"
#include "nodemanager.h"
#include "heartbeat.h"
#include "masklog.h"
#include "sys.h"
/* for now we operate under the assertion that there can be only one
* cluster active at a time. Changing this will require trickling
* cluster references throughout where nodes are looked up */
struct o2nm_cluster *o2nm_single_cluster = NULL;
char *o2nm_fence_method_desc[O2NM_FENCE_METHODS] = {
"reset", /* O2NM_FENCE_RESET */
"panic", /* O2NM_FENCE_PANIC */
};
static inline void o2nm_lock_subsystem(void);
static inline void o2nm_unlock_subsystem(void);
struct o2nm_node *o2nm_get_node_by_num(u8 node_num)
{
struct o2nm_node *node = NULL;
if (node_num >= O2NM_MAX_NODES || o2nm_single_cluster == NULL)
goto out;
read_lock(&o2nm_single_cluster->cl_nodes_lock);
node = o2nm_single_cluster->cl_nodes[node_num];
if (node)
config_item_get(&node->nd_item);
read_unlock(&o2nm_single_cluster->cl_nodes_lock);
out:
return node;
}
EXPORT_SYMBOL_GPL(o2nm_get_node_by_num);
int o2nm_configured_node_map(unsigned long *map, unsigned bytes)
{
struct o2nm_cluster *cluster = o2nm_single_cluster;
BUG_ON(bytes < (sizeof(cluster->cl_nodes_bitmap)));
if (cluster == NULL)
return -EINVAL;
read_lock(&cluster->cl_nodes_lock);
memcpy(map, cluster->cl_nodes_bitmap, sizeof(cluster->cl_nodes_bitmap));
read_unlock(&cluster->cl_nodes_lock);
return 0;
}
EXPORT_SYMBOL_GPL(o2nm_configured_node_map);
static struct o2nm_node *o2nm_node_ip_tree_lookup(struct o2nm_cluster *cluster,
__be32 ip_needle,
struct rb_node ***ret_p,
struct rb_node **ret_parent)
{
struct rb_node **p = &cluster->cl_node_ip_tree.rb_node;
struct rb_node *parent = NULL;
struct o2nm_node *node, *ret = NULL;
while (*p) {
int cmp;
parent = *p;
node = rb_entry(parent, struct o2nm_node, nd_ip_node);
cmp = memcmp(&ip_needle, &node->nd_ipv4_address,
sizeof(ip_needle));
if (cmp < 0)
p = &(*p)->rb_left;
else if (cmp > 0)
p = &(*p)->rb_right;
else {
ret = node;
break;
}
}
if (ret_p != NULL)
*ret_p = p;
if (ret_parent != NULL)
*ret_parent = parent;
return ret;
}
struct o2nm_node *o2nm_get_node_by_ip(__be32 addr)
{
struct o2nm_node *node = NULL;
struct o2nm_cluster *cluster = o2nm_single_cluster;
if (cluster == NULL)
goto out;
read_lock(&cluster->cl_nodes_lock);
node = o2nm_node_ip_tree_lookup(cluster, addr, NULL, NULL);
if (node)
config_item_get(&node->nd_item);
read_unlock(&cluster->cl_nodes_lock);
out:
return node;
}
EXPORT_SYMBOL_GPL(o2nm_get_node_by_ip);
void o2nm_node_put(struct o2nm_node *node)
{
config_item_put(&node->nd_item);
}
EXPORT_SYMBOL_GPL(o2nm_node_put);
void o2nm_node_get(struct o2nm_node *node)
{
config_item_get(&node->nd_item);
}
EXPORT_SYMBOL_GPL(o2nm_node_get);
u8 o2nm_this_node(void)
{
u8 node_num = O2NM_MAX_NODES;
if (o2nm_single_cluster && o2nm_single_cluster->cl_has_local)
node_num = o2nm_single_cluster->cl_local_node;
return node_num;
}
EXPORT_SYMBOL_GPL(o2nm_this_node);
/* node configfs bits */
static struct o2nm_cluster *to_o2nm_cluster(struct config_item *item)
{
return item ?
container_of(to_config_group(item), struct o2nm_cluster,
cl_group)
: NULL;
}
static struct o2nm_node *to_o2nm_node(struct config_item *item)
{
return item ? container_of(item, struct o2nm_node, nd_item) : NULL;
}
static void o2nm_node_release(struct config_item *item)
{
struct o2nm_node *node = to_o2nm_node(item);
kfree(node);
}
static ssize_t o2nm_node_num_show(struct config_item *item, char *page)
{
return sprintf(page, "%d\n", to_o2nm_node(item)->nd_num);
}
static struct o2nm_cluster *to_o2nm_cluster_from_node(struct o2nm_node *node)
{
/* through the first node_set .parent
* mycluster/nodes/mynode == o2nm_cluster->o2nm_node_group->o2nm_node */
if (node->nd_item.ci_parent)
return to_o2nm_cluster(node->nd_item.ci_parent->ci_parent);
else
return NULL;
}
enum {
O2NM_NODE_ATTR_NUM = 0,
O2NM_NODE_ATTR_PORT,
O2NM_NODE_ATTR_ADDRESS,
};
static ssize_t o2nm_node_num_store(struct config_item *item, const char *page,
size_t count)
{
struct o2nm_node *node = to_o2nm_node(item);
struct o2nm_cluster *cluster;
unsigned long tmp;
char *p = (char *)page;
int ret = 0;
tmp = simple_strtoul(p, &p, 0);
if (!p || (*p && (*p != '\n')))
return -EINVAL;
if (tmp >= O2NM_MAX_NODES)
return -ERANGE;
/* once we're in the cl_nodes tree networking can look us up by
* node number and try to use our address and port attributes
* to connect to this node.. make sure that they've been set
* before writing the node attribute? */
if (!test_bit(O2NM_NODE_ATTR_ADDRESS, &node->nd_set_attributes) ||
!test_bit(O2NM_NODE_ATTR_PORT, &node->nd_set_attributes))
return -EINVAL; /* XXX */
o2nm_lock_subsystem();
cluster = to_o2nm_cluster_from_node(node);
if (!cluster) {
o2nm_unlock_subsystem();
return -EINVAL;
}
write_lock(&cluster->cl_nodes_lock);
if (cluster->cl_nodes[tmp])
ret = -EEXIST;
else if (test_and_set_bit(O2NM_NODE_ATTR_NUM,
&node->nd_set_attributes))
ret = -EBUSY;
else {
cluster->cl_nodes[tmp] = node;
node->nd_num = tmp;
set_bit(tmp, cluster->cl_nodes_bitmap);
}
write_unlock(&cluster->cl_nodes_lock);
o2nm_unlock_subsystem();
if (ret)
return ret;
return count;
}
static ssize_t o2nm_node_ipv4_port_show(struct config_item *item, char *page)
{
return sprintf(page, "%u\n", ntohs(to_o2nm_node(item)->nd_ipv4_port));
}
static ssize_t o2nm_node_ipv4_port_store(struct config_item *item,
const char *page, size_t count)
{
struct o2nm_node *node = to_o2nm_node(item);
unsigned long tmp;
char *p = (char *)page;
tmp = simple_strtoul(p, &p, 0);
if (!p || (*p && (*p != '\n')))
return -EINVAL;
if (tmp == 0)
return -EINVAL;
if (tmp >= (u16)-1)
return -ERANGE;
if (test_and_set_bit(O2NM_NODE_ATTR_PORT, &node->nd_set_attributes))
return -EBUSY;
node->nd_ipv4_port = htons(tmp);
return count;
}
static ssize_t o2nm_node_ipv4_address_show(struct config_item *item, char *page)
{
return sprintf(page, "%pI4\n", &to_o2nm_node(item)->nd_ipv4_address);
}
static ssize_t o2nm_node_ipv4_address_store(struct config_item *item,
const char *page,
size_t count)
{
struct o2nm_node *node = to_o2nm_node(item);
struct o2nm_cluster *cluster;
int ret, i;
struct rb_node **p, *parent;
unsigned int octets[4];
__be32 ipv4_addr = 0;
ret = sscanf(page, "%3u.%3u.%3u.%3u", &octets[3], &octets[2],
&octets[1], &octets[0]);
if (ret != 4)
return -EINVAL;
for (i = 0; i < ARRAY_SIZE(octets); i++) {
if (octets[i] > 255)
return -ERANGE;
be32_add_cpu(&ipv4_addr, octets[i] << (i * 8));
}
o2nm_lock_subsystem();
cluster = to_o2nm_cluster_from_node(node);
if (!cluster) {
o2nm_unlock_subsystem();
return -EINVAL;
}
ret = 0;
write_lock(&cluster->cl_nodes_lock);
if (o2nm_node_ip_tree_lookup(cluster, ipv4_addr, &p, &parent))
ret = -EEXIST;
else if (test_and_set_bit(O2NM_NODE_ATTR_ADDRESS,
&node->nd_set_attributes))
ret = -EBUSY;
else {
rb_link_node(&node->nd_ip_node, parent, p);
rb_insert_color(&node->nd_ip_node, &cluster->cl_node_ip_tree);
}
write_unlock(&cluster->cl_nodes_lock);
o2nm_unlock_subsystem();
if (ret)
return ret;
memcpy(&node->nd_ipv4_address, &ipv4_addr, sizeof(ipv4_addr));
return count;
}
static ssize_t o2nm_node_local_show(struct config_item *item, char *page)
{
return sprintf(page, "%d\n", to_o2nm_node(item)->nd_local);
}
static ssize_t o2nm_node_local_store(struct config_item *item, const char *page,
size_t count)
{
struct o2nm_node *node = to_o2nm_node(item);
struct o2nm_cluster *cluster;
unsigned long tmp;
char *p = (char *)page;
ssize_t ret;
tmp = simple_strtoul(p, &p, 0);
if (!p || (*p && (*p != '\n')))
return -EINVAL;
tmp = !!tmp; /* boolean of whether this node wants to be local */
/* setting local turns on networking rx for now so we require having
* set everything else first */
if (!test_bit(O2NM_NODE_ATTR_ADDRESS, &node->nd_set_attributes) ||
!test_bit(O2NM_NODE_ATTR_NUM, &node->nd_set_attributes) ||
!test_bit(O2NM_NODE_ATTR_PORT, &node->nd_set_attributes))
return -EINVAL; /* XXX */
o2nm_lock_subsystem();
cluster = to_o2nm_cluster_from_node(node);
if (!cluster) {
ret = -EINVAL;
goto out;
}
/* the only failure case is trying to set a new local node
* when a different one is already set */
if (tmp && tmp == cluster->cl_has_local &&
cluster->cl_local_node != node->nd_num) {
ret = -EBUSY;
goto out;
}
/* bring up the rx thread if we're setting the new local node. */
if (tmp && !cluster->cl_has_local) {
ret = o2net_start_listening(node);
if (ret)
goto out;
}
if (!tmp && cluster->cl_has_local &&
cluster->cl_local_node == node->nd_num) {
o2net_stop_listening(node);
cluster->cl_local_node = O2NM_INVALID_NODE_NUM;
}
node->nd_local = tmp;
if (node->nd_local) {
cluster->cl_has_local = tmp;
cluster->cl_local_node = node->nd_num;
}
ret = count;
out:
o2nm_unlock_subsystem();
return ret;
}
CONFIGFS_ATTR(o2nm_node_, num);
CONFIGFS_ATTR(o2nm_node_, ipv4_port);
CONFIGFS_ATTR(o2nm_node_, ipv4_address);
CONFIGFS_ATTR(o2nm_node_, local);
static struct configfs_attribute *o2nm_node_attrs[] = {
&o2nm_node_attr_num,
&o2nm_node_attr_ipv4_port,
&o2nm_node_attr_ipv4_address,
&o2nm_node_attr_local,
NULL,
};
static struct configfs_item_operations o2nm_node_item_ops = {
.release = o2nm_node_release,
};
static const struct config_item_type o2nm_node_type = {
.ct_item_ops = &o2nm_node_item_ops,
.ct_attrs = o2nm_node_attrs,
.ct_owner = THIS_MODULE,
};
/* node set */
struct o2nm_node_group {
struct config_group ns_group;
/* some stuff? */
};
#if 0
static struct o2nm_node_group *to_o2nm_node_group(struct config_group *group)
{
return group ?
container_of(group, struct o2nm_node_group, ns_group)
: NULL;
}
#endif
static ssize_t o2nm_cluster_attr_write(const char *page, ssize_t count,
unsigned int *val)
{
unsigned long tmp;
char *p = (char *)page;
tmp = simple_strtoul(p, &p, 0);
if (!p || (*p && (*p != '\n')))
return -EINVAL;
if (tmp == 0)
return -EINVAL;
if (tmp >= (u32)-1)
return -ERANGE;
*val = tmp;
return count;
}
static ssize_t o2nm_cluster_idle_timeout_ms_show(struct config_item *item,
char *page)
{
return sprintf(page, "%u\n", to_o2nm_cluster(item)->cl_idle_timeout_ms);
}
static ssize_t o2nm_cluster_idle_timeout_ms_store(struct config_item *item,
const char *page, size_t count)
{
struct o2nm_cluster *cluster = to_o2nm_cluster(item);
ssize_t ret;
unsigned int val;
ret = o2nm_cluster_attr_write(page, count, &val);
if (ret > 0) {
if (cluster->cl_idle_timeout_ms != val
&& o2net_num_connected_peers()) {
mlog(ML_NOTICE,
"o2net: cannot change idle timeout after "
"the first peer has agreed to it."
" %d connected peers\n",
o2net_num_connected_peers());
ret = -EINVAL;
} else if (val <= cluster->cl_keepalive_delay_ms) {
mlog(ML_NOTICE, "o2net: idle timeout must be larger "
"than keepalive delay\n");
ret = -EINVAL;
} else {
cluster->cl_idle_timeout_ms = val;
}
}
return ret;
}
static ssize_t o2nm_cluster_keepalive_delay_ms_show(
struct config_item *item, char *page)
{
return sprintf(page, "%u\n",
to_o2nm_cluster(item)->cl_keepalive_delay_ms);
}
static ssize_t o2nm_cluster_keepalive_delay_ms_store(
struct config_item *item, const char *page, size_t count)
{
struct o2nm_cluster *cluster = to_o2nm_cluster(item);
ssize_t ret;
unsigned int val;
ret = o2nm_cluster_attr_write(page, count, &val);
if (ret > 0) {
if (cluster->cl_keepalive_delay_ms != val
&& o2net_num_connected_peers()) {
mlog(ML_NOTICE,
"o2net: cannot change keepalive delay after"
" the first peer has agreed to it."
" %d connected peers\n",
o2net_num_connected_peers());
ret = -EINVAL;
} else if (val >= cluster->cl_idle_timeout_ms) {
mlog(ML_NOTICE, "o2net: keepalive delay must be "
"smaller than idle timeout\n");
ret = -EINVAL;
} else {
cluster->cl_keepalive_delay_ms = val;
}
}
return ret;
}
static ssize_t o2nm_cluster_reconnect_delay_ms_show(
struct config_item *item, char *page)
{
return sprintf(page, "%u\n",
to_o2nm_cluster(item)->cl_reconnect_delay_ms);
}
static ssize_t o2nm_cluster_reconnect_delay_ms_store(
struct config_item *item, const char *page, size_t count)
{
return o2nm_cluster_attr_write(page, count,
&to_o2nm_cluster(item)->cl_reconnect_delay_ms);
}
static ssize_t o2nm_cluster_fence_method_show(
struct config_item *item, char *page)
{
struct o2nm_cluster *cluster = to_o2nm_cluster(item);
ssize_t ret = 0;
if (cluster)
ret = sprintf(page, "%s\n",
o2nm_fence_method_desc[cluster->cl_fence_method]);
return ret;
}
static ssize_t o2nm_cluster_fence_method_store(
struct config_item *item, const char *page, size_t count)
{
unsigned int i;
if (page[count - 1] != '\n')
goto bail;
for (i = 0; i < O2NM_FENCE_METHODS; ++i) {
if (count != strlen(o2nm_fence_method_desc[i]) + 1)
continue;
if (strncasecmp(page, o2nm_fence_method_desc[i], count - 1))
continue;
if (to_o2nm_cluster(item)->cl_fence_method != i) {
printk(KERN_INFO "ocfs2: Changing fence method to %s\n",
o2nm_fence_method_desc[i]);
to_o2nm_cluster(item)->cl_fence_method = i;
}
return count;
}
bail:
return -EINVAL;
}
CONFIGFS_ATTR(o2nm_cluster_, idle_timeout_ms);
CONFIGFS_ATTR(o2nm_cluster_, keepalive_delay_ms);
CONFIGFS_ATTR(o2nm_cluster_, reconnect_delay_ms);
CONFIGFS_ATTR(o2nm_cluster_, fence_method);
static struct configfs_attribute *o2nm_cluster_attrs[] = {
&o2nm_cluster_attr_idle_timeout_ms,
&o2nm_cluster_attr_keepalive_delay_ms,
&o2nm_cluster_attr_reconnect_delay_ms,
&o2nm_cluster_attr_fence_method,
NULL,
};
static struct config_item *o2nm_node_group_make_item(struct config_group *group,
const char *name)
{
struct o2nm_node *node = NULL;
if (strlen(name) > O2NM_MAX_NAME_LEN)
return ERR_PTR(-ENAMETOOLONG);
node = kzalloc(sizeof(struct o2nm_node), GFP_KERNEL);
if (node == NULL)
return ERR_PTR(-ENOMEM);
strcpy(node->nd_name, name); /* use item.ci_namebuf instead? */
config_item_init_type_name(&node->nd_item, name, &o2nm_node_type);
spin_lock_init(&node->nd_lock);
mlog(ML_CLUSTER, "o2nm: Registering node %s\n", name);
return &node->nd_item;
}
static void o2nm_node_group_drop_item(struct config_group *group,
struct config_item *item)
{
struct o2nm_node *node = to_o2nm_node(item);
struct o2nm_cluster *cluster = to_o2nm_cluster(group->cg_item.ci_parent);
o2net_disconnect_node(node);
if (cluster->cl_has_local &&
(cluster->cl_local_node == node->nd_num)) {
cluster->cl_has_local = 0;
cluster->cl_local_node = O2NM_INVALID_NODE_NUM;
o2net_stop_listening(node);
}
/* XXX call into net to stop this node from trading messages */
write_lock(&cluster->cl_nodes_lock);
/* XXX sloppy */
if (node->nd_ipv4_address)
rb_erase(&node->nd_ip_node, &cluster->cl_node_ip_tree);
/* nd_num might be 0 if the node number hasn't been set.. */
if (cluster->cl_nodes[node->nd_num] == node) {
cluster->cl_nodes[node->nd_num] = NULL;
clear_bit(node->nd_num, cluster->cl_nodes_bitmap);
}
write_unlock(&cluster->cl_nodes_lock);
mlog(ML_CLUSTER, "o2nm: Unregistered node %s\n",
config_item_name(&node->nd_item));
config_item_put(item);
}
static struct configfs_group_operations o2nm_node_group_group_ops = {
.make_item = o2nm_node_group_make_item,
.drop_item = o2nm_node_group_drop_item,
};
static const struct config_item_type o2nm_node_group_type = {
.ct_group_ops = &o2nm_node_group_group_ops,
.ct_owner = THIS_MODULE,
};
/* cluster */
static void o2nm_cluster_release(struct config_item *item)
{
struct o2nm_cluster *cluster = to_o2nm_cluster(item);
kfree(cluster);
}
static struct configfs_item_operations o2nm_cluster_item_ops = {
.release = o2nm_cluster_release,
};
static const struct config_item_type o2nm_cluster_type = {
.ct_item_ops = &o2nm_cluster_item_ops,
.ct_attrs = o2nm_cluster_attrs,
.ct_owner = THIS_MODULE,
};
/* cluster set */
struct o2nm_cluster_group {
struct configfs_subsystem cs_subsys;
/* some stuff? */
};
#if 0
static struct o2nm_cluster_group *to_o2nm_cluster_group(struct config_group *group)
{
return group ?
container_of(to_configfs_subsystem(group), struct o2nm_cluster_group, cs_subsys)
: NULL;
}
#endif
static struct config_group *o2nm_cluster_group_make_group(struct config_group *group,
const char *name)
{
struct o2nm_cluster *cluster = NULL;
struct o2nm_node_group *ns = NULL;
struct config_group *o2hb_group = NULL, *ret = NULL;
/* this runs under the parent dir's i_mutex; there can be only
* one caller in here at a time */
if (o2nm_single_cluster)
return ERR_PTR(-ENOSPC);
cluster = kzalloc(sizeof(struct o2nm_cluster), GFP_KERNEL);
ns = kzalloc(sizeof(struct o2nm_node_group), GFP_KERNEL);
o2hb_group = o2hb_alloc_hb_set();
if (cluster == NULL || ns == NULL || o2hb_group == NULL)
goto out;
config_group_init_type_name(&cluster->cl_group, name,
&o2nm_cluster_type);
configfs_add_default_group(&ns->ns_group, &cluster->cl_group);
config_group_init_type_name(&ns->ns_group, "node",
&o2nm_node_group_type);
configfs_add_default_group(o2hb_group, &cluster->cl_group);
rwlock_init(&cluster->cl_nodes_lock);
cluster->cl_node_ip_tree = RB_ROOT;
cluster->cl_reconnect_delay_ms = O2NET_RECONNECT_DELAY_MS_DEFAULT;
cluster->cl_idle_timeout_ms = O2NET_IDLE_TIMEOUT_MS_DEFAULT;
cluster->cl_keepalive_delay_ms = O2NET_KEEPALIVE_DELAY_MS_DEFAULT;
cluster->cl_fence_method = O2NM_FENCE_RESET;
ret = &cluster->cl_group;
o2nm_single_cluster = cluster;
out:
if (ret == NULL) {
kfree(cluster);
kfree(ns);
o2hb_free_hb_set(o2hb_group);
ret = ERR_PTR(-ENOMEM);
}
return ret;
}
static void o2nm_cluster_group_drop_item(struct config_group *group, struct config_item *item)
{
struct o2nm_cluster *cluster = to_o2nm_cluster(item);
BUG_ON(o2nm_single_cluster != cluster);
o2nm_single_cluster = NULL;
configfs_remove_default_groups(&cluster->cl_group);
config_item_put(item);
}
static struct configfs_group_operations o2nm_cluster_group_group_ops = {
.make_group = o2nm_cluster_group_make_group,
.drop_item = o2nm_cluster_group_drop_item,
};
static const struct config_item_type o2nm_cluster_group_type = {
.ct_group_ops = &o2nm_cluster_group_group_ops,
.ct_owner = THIS_MODULE,
};
static struct o2nm_cluster_group o2nm_cluster_group = {
.cs_subsys = {
.su_group = {
.cg_item = {
.ci_namebuf = "cluster",
.ci_type = &o2nm_cluster_group_type,
},
},
},
};
static inline void o2nm_lock_subsystem(void)
{
mutex_lock(&o2nm_cluster_group.cs_subsys.su_mutex);
}
static inline void o2nm_unlock_subsystem(void)
{
mutex_unlock(&o2nm_cluster_group.cs_subsys.su_mutex);
}
int o2nm_depend_item(struct config_item *item)
{
return configfs_depend_item(&o2nm_cluster_group.cs_subsys, item);
}
void o2nm_undepend_item(struct config_item *item)
{
configfs_undepend_item(item);
}
int o2nm_depend_this_node(void)
{
int ret = 0;
struct o2nm_node *local_node;
local_node = o2nm_get_node_by_num(o2nm_this_node());
if (!local_node) {
ret = -EINVAL;
goto out;
}
ret = o2nm_depend_item(&local_node->nd_item);
o2nm_node_put(local_node);
out:
return ret;
}
void o2nm_undepend_this_node(void)
{
struct o2nm_node *local_node;
local_node = o2nm_get_node_by_num(o2nm_this_node());
BUG_ON(!local_node);
o2nm_undepend_item(&local_node->nd_item);
o2nm_node_put(local_node);
}
static void __exit exit_o2nm(void)
{
/* XXX sync with hb callbacks and shut down hb? */
o2net_unregister_hb_callbacks();
configfs_unregister_subsystem(&o2nm_cluster_group.cs_subsys);
o2cb_sys_shutdown();
o2net_exit();
o2hb_exit();
}
static int __init init_o2nm(void)
{
int ret = -1;
ret = o2hb_init();
if (ret)
goto out;
ret = o2net_init();
if (ret)
goto out_o2hb;
ret = o2net_register_hb_callbacks();
if (ret)
goto out_o2net;
config_group_init(&o2nm_cluster_group.cs_subsys.su_group);
mutex_init(&o2nm_cluster_group.cs_subsys.su_mutex);
ret = configfs_register_subsystem(&o2nm_cluster_group.cs_subsys);
if (ret) {
printk(KERN_ERR "nodemanager: Registration returned %d\n", ret);
goto out_callbacks;
}
ret = o2cb_sys_init();
if (!ret)
goto out;
configfs_unregister_subsystem(&o2nm_cluster_group.cs_subsys);
out_callbacks:
o2net_unregister_hb_callbacks();
out_o2net:
o2net_exit();
out_o2hb:
o2hb_exit();
out:
return ret;
}
MODULE_AUTHOR("Oracle");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("OCFS2 cluster management");
module_init(init_o2nm)
module_exit(exit_o2nm)
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