[PATCH] OCFS2: The Second Oracle Cluster Filesystem
A simple node information service, filled and updated from
userspace. The rest of the stack queries this service for simple node
information.
Signed-off-by: Mark Fasheh <mark.fasheh@oracle.com>
Signed-off-by: Kurt Hackel <kurt.hackel@oracle.com>
diff --git a/fs/ocfs2/cluster/Makefile b/fs/ocfs2/cluster/Makefile
new file mode 100644
index 0000000..cdd162f
--- /dev/null
+++ b/fs/ocfs2/cluster/Makefile
@@ -0,0 +1,4 @@
+obj-$(CONFIG_OCFS2_FS) += ocfs2_nodemanager.o
+
+ocfs2_nodemanager-objs := heartbeat.o masklog.o sys.o nodemanager.o \
+ quorum.o tcp.o ver.o
diff --git a/fs/ocfs2/cluster/endian.h b/fs/ocfs2/cluster/endian.h
new file mode 100644
index 0000000..2df9082
--- /dev/null
+++ b/fs/ocfs2/cluster/endian.h
@@ -0,0 +1,30 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * Copyright (C) 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.
+ */
+
+#ifndef OCFS2_CLUSTER_ENDIAN_H
+#define OCFS2_CLUSTER_ENDIAN_H
+
+static inline void be32_add_cpu(__be32 *var, u32 val)
+{
+ *var = cpu_to_be32(be32_to_cpu(*var) + val);
+}
+
+#endif /* OCFS2_CLUSTER_ENDIAN_H */
diff --git a/fs/ocfs2/cluster/nodemanager.c b/fs/ocfs2/cluster/nodemanager.c
new file mode 100644
index 0000000..5fd60c1
--- /dev/null
+++ b/fs/ocfs2/cluster/nodemanager.c
@@ -0,0 +1,791 @@
+/* -*- 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/kernel.h>
+#include <linux/module.h>
+#include <linux/sysctl.h>
+#include <linux/configfs.h>
+
+#include "endian.h"
+#include "tcp.h"
+#include "nodemanager.h"
+#include "heartbeat.h"
+#include "masklog.h"
+#include "sys.h"
+#include "ver.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 */
+static struct o2nm_cluster *o2nm_single_cluster = NULL;
+
+#define OCFS2_MAX_HB_CTL_PATH 256
+static char ocfs2_hb_ctl_path[OCFS2_MAX_HB_CTL_PATH] = "/sbin/ocfs2_hb_ctl";
+
+static ctl_table ocfs2_nm_table[] = {
+ {
+ .ctl_name = 1,
+ .procname = "hb_ctl_path",
+ .data = ocfs2_hb_ctl_path,
+ .maxlen = OCFS2_MAX_HB_CTL_PATH,
+ .mode = 0644,
+ .proc_handler = &proc_dostring,
+ .strategy = &sysctl_string,
+ },
+ { .ctl_name = 0 }
+};
+
+static ctl_table ocfs2_mod_table[] = {
+ {
+ .ctl_name = KERN_OCFS2_NM,
+ .procname = "nm",
+ .data = NULL,
+ .maxlen = 0,
+ .mode = 0555,
+ .child = ocfs2_nm_table
+ },
+ { .ctl_name = 0}
+};
+
+static ctl_table ocfs2_kern_table[] = {
+ {
+ .ctl_name = KERN_OCFS2,
+ .procname = "ocfs2",
+ .data = NULL,
+ .maxlen = 0,
+ .mode = 0555,
+ .child = ocfs2_mod_table
+ },
+ { .ctl_name = 0}
+};
+
+static ctl_table ocfs2_root_table[] = {
+ {
+ .ctl_name = CTL_FS,
+ .procname = "fs",
+ .data = NULL,
+ .maxlen = 0,
+ .mode = 0555,
+ .child = ocfs2_kern_table
+ },
+ { .ctl_name = 0 }
+};
+
+static struct ctl_table_header *ocfs2_table_header = NULL;
+
+const char *o2nm_get_hb_ctl_path(void)
+{
+ return ocfs2_hb_ctl_path;
+}
+EXPORT_SYMBOL_GPL(o2nm_get_hb_ctl_path);
+
+struct o2nm_cluster {
+ struct config_group cl_group;
+ unsigned cl_has_local:1;
+ u8 cl_local_node;
+ rwlock_t cl_nodes_lock;
+ struct o2nm_node *cl_nodes[O2NM_MAX_NODES];
+ struct rb_root cl_node_ip_tree;
+ /* this bitmap is part of a hack for disk bitmap.. will go eventually. - zab */
+ unsigned long cl_nodes_bitmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
+};
+
+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) {
+ parent = *p;
+ node = rb_entry(parent, struct o2nm_node, nd_ip_node);
+
+ if (memcmp(&ip_needle, &node->nd_ipv4_address,
+ sizeof(ip_needle)) < 0)
+ p = &(*p)->rb_left;
+ else if (memcmp(&ip_needle, &node->nd_ipv4_address,
+ sizeof(ip_needle)) > 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_read(struct o2nm_node *node, char *page)
+{
+ return sprintf(page, "%d\n", node->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 */
+ return to_o2nm_cluster(node->nd_item.ci_parent->ci_parent);
+}
+
+enum {
+ O2NM_NODE_ATTR_NUM = 0,
+ O2NM_NODE_ATTR_PORT,
+ O2NM_NODE_ATTR_ADDRESS,
+ O2NM_NODE_ATTR_LOCAL,
+};
+
+static ssize_t o2nm_node_num_write(struct o2nm_node *node, const char *page,
+ size_t count)
+{
+ struct o2nm_cluster *cluster = to_o2nm_cluster_from_node(node);
+ unsigned long tmp;
+ char *p = (char *)page;
+
+ 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 */
+
+ write_lock(&cluster->cl_nodes_lock);
+ if (cluster->cl_nodes[tmp])
+ p = NULL;
+ else {
+ cluster->cl_nodes[tmp] = node;
+ node->nd_num = tmp;
+ set_bit(tmp, cluster->cl_nodes_bitmap);
+ }
+ write_unlock(&cluster->cl_nodes_lock);
+ if (p == NULL)
+ return -EEXIST;
+
+ return count;
+}
+static ssize_t o2nm_node_ipv4_port_read(struct o2nm_node *node, char *page)
+{
+ return sprintf(page, "%u\n", ntohs(node->nd_ipv4_port));
+}
+
+static ssize_t o2nm_node_ipv4_port_write(struct o2nm_node *node,
+ const char *page, size_t count)
+{
+ 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;
+
+ node->nd_ipv4_port = htons(tmp);
+
+ return count;
+}
+
+static ssize_t o2nm_node_ipv4_address_read(struct o2nm_node *node, char *page)
+{
+ return sprintf(page, "%u.%u.%u.%u\n", NIPQUAD(node->nd_ipv4_address));
+}
+
+static ssize_t o2nm_node_ipv4_address_write(struct o2nm_node *node,
+ const char *page,
+ size_t count)
+{
+ struct o2nm_cluster *cluster = to_o2nm_cluster_from_node(node);
+ 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));
+ }
+
+ ret = 0;
+ write_lock(&cluster->cl_nodes_lock);
+ if (o2nm_node_ip_tree_lookup(cluster, ipv4_addr, &p, &parent))
+ ret = -EEXIST;
+ 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);
+ if (ret)
+ return ret;
+
+ memcpy(&node->nd_ipv4_address, &ipv4_addr, sizeof(ipv4_addr));
+
+ return count;
+}
+
+static ssize_t o2nm_node_local_read(struct o2nm_node *node, char *page)
+{
+ return sprintf(page, "%d\n", node->nd_local);
+}
+
+static ssize_t o2nm_node_local_write(struct o2nm_node *node, const char *page,
+ size_t count)
+{
+ struct o2nm_cluster *cluster = to_o2nm_cluster_from_node(node);
+ 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 */
+
+ /* 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)
+ return -EBUSY;
+
+ /* 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)
+ return ret;
+ }
+
+ 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;
+ }
+
+ return count;
+}
+
+struct o2nm_node_attribute {
+ struct configfs_attribute attr;
+ ssize_t (*show)(struct o2nm_node *, char *);
+ ssize_t (*store)(struct o2nm_node *, const char *, size_t);
+};
+
+static struct o2nm_node_attribute o2nm_node_attr_num = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "num",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = o2nm_node_num_read,
+ .store = o2nm_node_num_write,
+};
+
+static struct o2nm_node_attribute o2nm_node_attr_ipv4_port = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "ipv4_port",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = o2nm_node_ipv4_port_read,
+ .store = o2nm_node_ipv4_port_write,
+};
+
+static struct o2nm_node_attribute o2nm_node_attr_ipv4_address = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "ipv4_address",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = o2nm_node_ipv4_address_read,
+ .store = o2nm_node_ipv4_address_write,
+};
+
+static struct o2nm_node_attribute o2nm_node_attr_local = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "local",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = o2nm_node_local_read,
+ .store = o2nm_node_local_write,
+};
+
+static struct configfs_attribute *o2nm_node_attrs[] = {
+ [O2NM_NODE_ATTR_NUM] = &o2nm_node_attr_num.attr,
+ [O2NM_NODE_ATTR_PORT] = &o2nm_node_attr_ipv4_port.attr,
+ [O2NM_NODE_ATTR_ADDRESS] = &o2nm_node_attr_ipv4_address.attr,
+ [O2NM_NODE_ATTR_LOCAL] = &o2nm_node_attr_local.attr,
+ NULL,
+};
+
+static int o2nm_attr_index(struct configfs_attribute *attr)
+{
+ int i;
+ for (i = 0; i < ARRAY_SIZE(o2nm_node_attrs); i++) {
+ if (attr == o2nm_node_attrs[i])
+ return i;
+ }
+ BUG();
+ return 0;
+}
+
+static ssize_t o2nm_node_show(struct config_item *item,
+ struct configfs_attribute *attr,
+ char *page)
+{
+ struct o2nm_node *node = to_o2nm_node(item);
+ struct o2nm_node_attribute *o2nm_node_attr =
+ container_of(attr, struct o2nm_node_attribute, attr);
+ ssize_t ret = 0;
+
+ if (o2nm_node_attr->show)
+ ret = o2nm_node_attr->show(node, page);
+ return ret;
+}
+
+static ssize_t o2nm_node_store(struct config_item *item,
+ struct configfs_attribute *attr,
+ const char *page, size_t count)
+{
+ struct o2nm_node *node = to_o2nm_node(item);
+ struct o2nm_node_attribute *o2nm_node_attr =
+ container_of(attr, struct o2nm_node_attribute, attr);
+ ssize_t ret;
+ int attr_index = o2nm_attr_index(attr);
+
+ if (o2nm_node_attr->store == NULL) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (test_bit(attr_index, &node->nd_set_attributes))
+ return -EBUSY;
+
+ ret = o2nm_node_attr->store(node, page, count);
+ if (ret < count)
+ goto out;
+
+ set_bit(attr_index, &node->nd_set_attributes);
+out:
+ return ret;
+}
+
+static struct configfs_item_operations o2nm_node_item_ops = {
+ .release = o2nm_node_release,
+ .show_attribute = o2nm_node_show,
+ .store_attribute = o2nm_node_store,
+};
+
+static 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 struct config_item *o2nm_node_group_make_item(struct config_group *group,
+ const char *name)
+{
+ struct o2nm_node *node = NULL;
+ struct config_item *ret = NULL;
+
+ if (strlen(name) > O2NM_MAX_NAME_LEN)
+ goto out; /* ENAMETOOLONG */
+
+ node = kcalloc(1, sizeof(struct o2nm_node), GFP_KERNEL);
+ if (node == NULL)
+ goto out; /* 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);
+
+ ret = &node->nd_item;
+
+out:
+ if (ret == NULL)
+ kfree(node);
+
+ return ret;
+}
+
+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);
+
+ 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 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->cl_group.default_groups);
+ kfree(cluster);
+}
+
+static struct configfs_item_operations o2nm_cluster_item_ops = {
+ .release = o2nm_cluster_release,
+};
+
+static struct config_item_type o2nm_cluster_type = {
+ .ct_item_ops = &o2nm_cluster_item_ops,
+ .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;
+ void *defs = NULL;
+
+ /* this runs under the parent dir's i_sem; there can be only
+ * one caller in here at a time */
+ if (o2nm_single_cluster)
+ goto out; /* ENOSPC */
+
+ cluster = kcalloc(1, sizeof(struct o2nm_cluster), GFP_KERNEL);
+ ns = kcalloc(1, sizeof(struct o2nm_node_group), GFP_KERNEL);
+ defs = kcalloc(3, sizeof(struct config_group *), GFP_KERNEL);
+ o2hb_group = o2hb_alloc_hb_set();
+ if (cluster == NULL || ns == NULL || o2hb_group == NULL || defs == NULL)
+ goto out;
+
+ config_group_init_type_name(&cluster->cl_group, name,
+ &o2nm_cluster_type);
+ config_group_init_type_name(&ns->ns_group, "node",
+ &o2nm_node_group_type);
+
+ cluster->cl_group.default_groups = defs;
+ cluster->cl_group.default_groups[0] = &ns->ns_group;
+ cluster->cl_group.default_groups[1] = o2hb_group;
+ cluster->cl_group.default_groups[2] = NULL;
+ rwlock_init(&cluster->cl_nodes_lock);
+ cluster->cl_node_ip_tree = RB_ROOT;
+
+ ret = &cluster->cl_group;
+ o2nm_single_cluster = cluster;
+
+out:
+ if (ret == NULL) {
+ kfree(cluster);
+ kfree(ns);
+ o2hb_free_hb_set(o2hb_group);
+ kfree(defs);
+ }
+
+ 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);
+ int i;
+ struct config_item *killme;
+
+ BUG_ON(o2nm_single_cluster != cluster);
+ o2nm_single_cluster = NULL;
+
+ for (i = 0; cluster->cl_group.default_groups[i]; i++) {
+ killme = &cluster->cl_group.default_groups[i]->cg_item;
+ cluster->cl_group.default_groups[i] = NULL;
+ config_item_put(killme);
+ }
+
+ 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 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 void __exit exit_o2nm(void)
+{
+ if (ocfs2_table_header)
+ unregister_sysctl_table(ocfs2_table_header);
+
+ /* 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();
+}
+
+static int __init init_o2nm(void)
+{
+ int ret = -1;
+
+ cluster_print_version();
+
+ o2hb_init();
+ o2net_init();
+
+ ocfs2_table_header = register_sysctl_table(ocfs2_root_table, 0);
+ if (!ocfs2_table_header) {
+ printk(KERN_ERR "nodemanager: unable to register sysctl\n");
+ ret = -ENOMEM; /* or something. */
+ goto out;
+ }
+
+ ret = o2net_register_hb_callbacks();
+ if (ret)
+ goto out_sysctl;
+
+ config_group_init(&o2nm_cluster_group.cs_subsys.su_group);
+ init_MUTEX(&o2nm_cluster_group.cs_subsys.su_sem);
+ 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_sysctl:
+ unregister_sysctl_table(ocfs2_table_header);
+out:
+ return ret;
+}
+
+MODULE_AUTHOR("Oracle");
+MODULE_LICENSE("GPL");
+
+module_init(init_o2nm)
+module_exit(exit_o2nm)
diff --git a/fs/ocfs2/cluster/nodemanager.h b/fs/ocfs2/cluster/nodemanager.h
new file mode 100644
index 0000000..fce8033
--- /dev/null
+++ b/fs/ocfs2/cluster/nodemanager.h
@@ -0,0 +1,64 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * nodemanager.h
+ *
+ * Function prototypes
+ *
+ * Copyright (C) 2004 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.
+ *
+ */
+
+#ifndef O2CLUSTER_NODEMANAGER_H
+#define O2CLUSTER_NODEMANAGER_H
+
+#include "ocfs2_nodemanager.h"
+
+/* This totally doesn't belong here. */
+#include <linux/configfs.h>
+#include <linux/rbtree.h>
+
+#define KERN_OCFS2 988
+#define KERN_OCFS2_NM 1
+
+const char *o2nm_get_hb_ctl_path(void);
+
+struct o2nm_node {
+ spinlock_t nd_lock;
+ struct config_item nd_item;
+ char nd_name[O2NM_MAX_NAME_LEN+1]; /* replace? */
+ __u8 nd_num;
+ /* only one address per node, as attributes, for now. */
+ __be32 nd_ipv4_address;
+ __be16 nd_ipv4_port;
+ struct rb_node nd_ip_node;
+ /* there can be only one local node for now */
+ int nd_local;
+
+ unsigned long nd_set_attributes;
+};
+
+u8 o2nm_this_node(void);
+
+int o2nm_configured_node_map(unsigned long *map, unsigned bytes);
+struct o2nm_node *o2nm_get_node_by_num(u8 node_num);
+struct o2nm_node *o2nm_get_node_by_ip(__be32 addr);
+void o2nm_node_get(struct o2nm_node *node);
+void o2nm_node_put(struct o2nm_node *node);
+
+#endif /* O2CLUSTER_NODEMANAGER_H */
diff --git a/fs/ocfs2/cluster/ocfs2_nodemanager.h b/fs/ocfs2/cluster/ocfs2_nodemanager.h
new file mode 100644
index 0000000..5b9854b
--- /dev/null
+++ b/fs/ocfs2/cluster/ocfs2_nodemanager.h
@@ -0,0 +1,39 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * ocfs2_nodemanager.h
+ *
+ * Header describing the interface between userspace and the kernel
+ * for the ocfs2_nodemanager module.
+ *
+ * Copyright (C) 2002, 2004 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.
+ *
+ */
+
+#ifndef _OCFS2_NODEMANAGER_H
+#define _OCFS2_NODEMANAGER_H
+
+#define O2NM_API_VERSION 5
+
+#define O2NM_MAX_NODES 255
+#define O2NM_INVALID_NODE_NUM 255
+
+/* host name, group name, cluster name all 64 bytes */
+#define O2NM_MAX_NAME_LEN 64 // __NEW_UTS_LEN
+
+#endif /* _OCFS2_NODEMANAGER_H */
diff --git a/fs/ocfs2/cluster/ver.c b/fs/ocfs2/cluster/ver.c
new file mode 100644
index 0000000..7286c48
--- /dev/null
+++ b/fs/ocfs2/cluster/ver.c
@@ -0,0 +1,42 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * ver.c
+ *
+ * version string
+ *
+ * Copyright (C) 2002, 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/module.h>
+#include <linux/kernel.h>
+
+#include "ver.h"
+
+#define CLUSTER_BUILD_VERSION "1.3.3"
+
+#define VERSION_STR "OCFS2 Node Manager " CLUSTER_BUILD_VERSION
+
+void cluster_print_version(void)
+{
+ printk(KERN_INFO "%s\n", VERSION_STR);
+}
+
+MODULE_DESCRIPTION(VERSION_STR);
+
+MODULE_VERSION(CLUSTER_BUILD_VERSION);
diff --git a/fs/ocfs2/cluster/ver.h b/fs/ocfs2/cluster/ver.h
new file mode 100644
index 0000000..32554c3
--- /dev/null
+++ b/fs/ocfs2/cluster/ver.h
@@ -0,0 +1,31 @@
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * ver.h
+ *
+ * Function prototypes
+ *
+ * Copyright (C) 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.
+ */
+
+#ifndef O2CLUSTER_VER_H
+#define O2CLUSTER_VER_H
+
+void cluster_print_version(void);
+
+#endif /* O2CLUSTER_VER_H */