forked from luck/tmp_suning_uos_patched
853bc26a7e
The subsystem.su_mutex is required while accessing the item->ci_parent, otherwise, NULL pointer dereference to the item->ci_parent will be triggered in the following situation: add node delete node sys_write vfs_write configfs_write_file o2nm_node_store o2nm_node_local_write do_rmdir vfs_rmdir configfs_rmdir mutex_lock(&subsys->su_mutex); unlink_obj item->ci_group = NULL; item->ci_parent = NULL; to_o2nm_cluster_from_node node->nd_item.ci_parent->ci_parent BUG since of NULL pointer dereference to nd_item.ci_parent Moreover, the o2nm_cluster also should be protected by the subsystem.su_mutex. [alex.chen@huawei.com: v2] Link: http://lkml.kernel.org/r/59EEAA69.9080703@huawei.com Link: http://lkml.kernel.org/r/59E9B36A.10700@huawei.com Signed-off-by: Alex Chen <alex.chen@huawei.com> Reviewed-by: Jun Piao <piaojun@huawei.com> Reviewed-by: Joseph Qi <jiangqi903@gmail.com> Cc: Mark Fasheh <mfasheh@versity.com> Cc: Joel Becker <jlbec@evilplan.org> Cc: Junxiao Bi <junxiao.bi@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
884 lines
21 KiB
C
884 lines
21 KiB
C
/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* Copyright (C) 2004, 2005 Oracle. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include <linux/slab.h>
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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 "tcp.h"
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#include "nodemanager.h"
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#include "heartbeat.h"
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#include "masklog.h"
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#include "sys.h"
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/* for now we operate under the assertion that there can be only one
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* cluster active at a time. Changing this will require trickling
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* cluster references throughout where nodes are looked up */
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struct o2nm_cluster *o2nm_single_cluster = NULL;
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char *o2nm_fence_method_desc[O2NM_FENCE_METHODS] = {
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"reset", /* O2NM_FENCE_RESET */
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"panic", /* O2NM_FENCE_PANIC */
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};
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static inline void o2nm_lock_subsystem(void);
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static inline void o2nm_unlock_subsystem(void);
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struct o2nm_node *o2nm_get_node_by_num(u8 node_num)
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{
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struct o2nm_node *node = NULL;
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if (node_num >= O2NM_MAX_NODES || o2nm_single_cluster == NULL)
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goto out;
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read_lock(&o2nm_single_cluster->cl_nodes_lock);
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node = o2nm_single_cluster->cl_nodes[node_num];
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if (node)
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config_item_get(&node->nd_item);
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read_unlock(&o2nm_single_cluster->cl_nodes_lock);
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out:
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return node;
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}
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EXPORT_SYMBOL_GPL(o2nm_get_node_by_num);
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int o2nm_configured_node_map(unsigned long *map, unsigned bytes)
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{
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struct o2nm_cluster *cluster = o2nm_single_cluster;
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BUG_ON(bytes < (sizeof(cluster->cl_nodes_bitmap)));
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if (cluster == NULL)
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return -EINVAL;
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read_lock(&cluster->cl_nodes_lock);
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memcpy(map, cluster->cl_nodes_bitmap, sizeof(cluster->cl_nodes_bitmap));
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read_unlock(&cluster->cl_nodes_lock);
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return 0;
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}
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EXPORT_SYMBOL_GPL(o2nm_configured_node_map);
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static struct o2nm_node *o2nm_node_ip_tree_lookup(struct o2nm_cluster *cluster,
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__be32 ip_needle,
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struct rb_node ***ret_p,
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struct rb_node **ret_parent)
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{
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struct rb_node **p = &cluster->cl_node_ip_tree.rb_node;
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struct rb_node *parent = NULL;
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struct o2nm_node *node, *ret = NULL;
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while (*p) {
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int cmp;
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parent = *p;
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node = rb_entry(parent, struct o2nm_node, nd_ip_node);
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cmp = memcmp(&ip_needle, &node->nd_ipv4_address,
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sizeof(ip_needle));
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if (cmp < 0)
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p = &(*p)->rb_left;
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else if (cmp > 0)
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p = &(*p)->rb_right;
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else {
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ret = node;
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break;
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}
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}
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if (ret_p != NULL)
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*ret_p = p;
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if (ret_parent != NULL)
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*ret_parent = parent;
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return ret;
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}
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struct o2nm_node *o2nm_get_node_by_ip(__be32 addr)
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{
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struct o2nm_node *node = NULL;
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struct o2nm_cluster *cluster = o2nm_single_cluster;
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if (cluster == NULL)
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goto out;
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read_lock(&cluster->cl_nodes_lock);
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node = o2nm_node_ip_tree_lookup(cluster, addr, NULL, NULL);
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if (node)
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config_item_get(&node->nd_item);
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read_unlock(&cluster->cl_nodes_lock);
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out:
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return node;
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}
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EXPORT_SYMBOL_GPL(o2nm_get_node_by_ip);
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void o2nm_node_put(struct o2nm_node *node)
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{
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config_item_put(&node->nd_item);
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}
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EXPORT_SYMBOL_GPL(o2nm_node_put);
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void o2nm_node_get(struct o2nm_node *node)
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{
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config_item_get(&node->nd_item);
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}
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EXPORT_SYMBOL_GPL(o2nm_node_get);
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u8 o2nm_this_node(void)
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{
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u8 node_num = O2NM_MAX_NODES;
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if (o2nm_single_cluster && o2nm_single_cluster->cl_has_local)
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node_num = o2nm_single_cluster->cl_local_node;
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return node_num;
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}
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EXPORT_SYMBOL_GPL(o2nm_this_node);
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/* node configfs bits */
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static struct o2nm_cluster *to_o2nm_cluster(struct config_item *item)
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{
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return item ?
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container_of(to_config_group(item), struct o2nm_cluster,
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cl_group)
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: NULL;
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}
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static struct o2nm_node *to_o2nm_node(struct config_item *item)
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{
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return item ? container_of(item, struct o2nm_node, nd_item) : NULL;
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}
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static void o2nm_node_release(struct config_item *item)
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{
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struct o2nm_node *node = to_o2nm_node(item);
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kfree(node);
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}
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static ssize_t o2nm_node_num_show(struct config_item *item, char *page)
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{
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return sprintf(page, "%d\n", to_o2nm_node(item)->nd_num);
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}
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static struct o2nm_cluster *to_o2nm_cluster_from_node(struct o2nm_node *node)
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{
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/* through the first node_set .parent
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* mycluster/nodes/mynode == o2nm_cluster->o2nm_node_group->o2nm_node */
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if (node->nd_item.ci_parent)
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return to_o2nm_cluster(node->nd_item.ci_parent->ci_parent);
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else
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return NULL;
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}
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enum {
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O2NM_NODE_ATTR_NUM = 0,
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O2NM_NODE_ATTR_PORT,
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O2NM_NODE_ATTR_ADDRESS,
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};
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static ssize_t o2nm_node_num_store(struct config_item *item, const char *page,
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size_t count)
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{
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struct o2nm_node *node = to_o2nm_node(item);
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struct o2nm_cluster *cluster;
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unsigned long tmp;
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char *p = (char *)page;
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int ret = 0;
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tmp = simple_strtoul(p, &p, 0);
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if (!p || (*p && (*p != '\n')))
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return -EINVAL;
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if (tmp >= O2NM_MAX_NODES)
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return -ERANGE;
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/* once we're in the cl_nodes tree networking can look us up by
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* node number and try to use our address and port attributes
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* to connect to this node.. make sure that they've been set
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* before writing the node attribute? */
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if (!test_bit(O2NM_NODE_ATTR_ADDRESS, &node->nd_set_attributes) ||
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!test_bit(O2NM_NODE_ATTR_PORT, &node->nd_set_attributes))
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return -EINVAL; /* XXX */
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o2nm_lock_subsystem();
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cluster = to_o2nm_cluster_from_node(node);
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if (!cluster) {
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o2nm_unlock_subsystem();
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return -EINVAL;
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}
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write_lock(&cluster->cl_nodes_lock);
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if (cluster->cl_nodes[tmp])
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ret = -EEXIST;
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else if (test_and_set_bit(O2NM_NODE_ATTR_NUM,
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&node->nd_set_attributes))
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ret = -EBUSY;
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else {
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cluster->cl_nodes[tmp] = node;
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node->nd_num = tmp;
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set_bit(tmp, cluster->cl_nodes_bitmap);
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}
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write_unlock(&cluster->cl_nodes_lock);
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o2nm_unlock_subsystem();
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if (ret)
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return ret;
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return count;
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}
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static ssize_t o2nm_node_ipv4_port_show(struct config_item *item, char *page)
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{
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return sprintf(page, "%u\n", ntohs(to_o2nm_node(item)->nd_ipv4_port));
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}
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static ssize_t o2nm_node_ipv4_port_store(struct config_item *item,
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const char *page, size_t count)
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{
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struct o2nm_node *node = to_o2nm_node(item);
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unsigned long tmp;
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char *p = (char *)page;
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tmp = simple_strtoul(p, &p, 0);
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if (!p || (*p && (*p != '\n')))
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return -EINVAL;
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if (tmp == 0)
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return -EINVAL;
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if (tmp >= (u16)-1)
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return -ERANGE;
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if (test_and_set_bit(O2NM_NODE_ATTR_PORT, &node->nd_set_attributes))
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return -EBUSY;
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node->nd_ipv4_port = htons(tmp);
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return count;
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}
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static ssize_t o2nm_node_ipv4_address_show(struct config_item *item, char *page)
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{
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return sprintf(page, "%pI4\n", &to_o2nm_node(item)->nd_ipv4_address);
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}
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static ssize_t o2nm_node_ipv4_address_store(struct config_item *item,
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const char *page,
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size_t count)
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{
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struct o2nm_node *node = to_o2nm_node(item);
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struct o2nm_cluster *cluster;
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int ret, i;
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struct rb_node **p, *parent;
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unsigned int octets[4];
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__be32 ipv4_addr = 0;
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ret = sscanf(page, "%3u.%3u.%3u.%3u", &octets[3], &octets[2],
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&octets[1], &octets[0]);
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if (ret != 4)
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return -EINVAL;
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for (i = 0; i < ARRAY_SIZE(octets); i++) {
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if (octets[i] > 255)
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return -ERANGE;
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be32_add_cpu(&ipv4_addr, octets[i] << (i * 8));
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}
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o2nm_lock_subsystem();
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cluster = to_o2nm_cluster_from_node(node);
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if (!cluster) {
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o2nm_unlock_subsystem();
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return -EINVAL;
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}
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ret = 0;
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write_lock(&cluster->cl_nodes_lock);
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if (o2nm_node_ip_tree_lookup(cluster, ipv4_addr, &p, &parent))
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ret = -EEXIST;
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else if (test_and_set_bit(O2NM_NODE_ATTR_ADDRESS,
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&node->nd_set_attributes))
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ret = -EBUSY;
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else {
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rb_link_node(&node->nd_ip_node, parent, p);
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rb_insert_color(&node->nd_ip_node, &cluster->cl_node_ip_tree);
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}
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write_unlock(&cluster->cl_nodes_lock);
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o2nm_unlock_subsystem();
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if (ret)
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return ret;
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memcpy(&node->nd_ipv4_address, &ipv4_addr, sizeof(ipv4_addr));
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return count;
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}
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static ssize_t o2nm_node_local_show(struct config_item *item, char *page)
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{
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return sprintf(page, "%d\n", to_o2nm_node(item)->nd_local);
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}
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static ssize_t o2nm_node_local_store(struct config_item *item, const char *page,
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size_t count)
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{
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struct o2nm_node *node = to_o2nm_node(item);
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struct o2nm_cluster *cluster;
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unsigned long tmp;
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char *p = (char *)page;
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ssize_t ret;
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tmp = simple_strtoul(p, &p, 0);
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if (!p || (*p && (*p != '\n')))
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return -EINVAL;
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tmp = !!tmp; /* boolean of whether this node wants to be local */
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/* setting local turns on networking rx for now so we require having
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* set everything else first */
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if (!test_bit(O2NM_NODE_ATTR_ADDRESS, &node->nd_set_attributes) ||
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!test_bit(O2NM_NODE_ATTR_NUM, &node->nd_set_attributes) ||
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!test_bit(O2NM_NODE_ATTR_PORT, &node->nd_set_attributes))
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return -EINVAL; /* XXX */
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o2nm_lock_subsystem();
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cluster = to_o2nm_cluster_from_node(node);
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if (!cluster) {
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ret = -EINVAL;
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goto out;
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}
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/* the only failure case is trying to set a new local node
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* when a different one is already set */
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if (tmp && tmp == cluster->cl_has_local &&
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cluster->cl_local_node != node->nd_num) {
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ret = -EBUSY;
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goto out;
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}
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/* bring up the rx thread if we're setting the new local node. */
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if (tmp && !cluster->cl_has_local) {
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ret = o2net_start_listening(node);
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if (ret)
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goto out;
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}
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if (!tmp && cluster->cl_has_local &&
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cluster->cl_local_node == node->nd_num) {
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o2net_stop_listening(node);
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cluster->cl_local_node = O2NM_INVALID_NODE_NUM;
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}
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node->nd_local = tmp;
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if (node->nd_local) {
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cluster->cl_has_local = tmp;
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cluster->cl_local_node = node->nd_num;
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}
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ret = count;
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out:
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o2nm_unlock_subsystem();
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return ret;
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}
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CONFIGFS_ATTR(o2nm_node_, num);
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CONFIGFS_ATTR(o2nm_node_, ipv4_port);
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CONFIGFS_ATTR(o2nm_node_, ipv4_address);
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CONFIGFS_ATTR(o2nm_node_, local);
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static struct configfs_attribute *o2nm_node_attrs[] = {
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&o2nm_node_attr_num,
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&o2nm_node_attr_ipv4_port,
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&o2nm_node_attr_ipv4_address,
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&o2nm_node_attr_local,
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NULL,
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};
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static struct configfs_item_operations o2nm_node_item_ops = {
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.release = o2nm_node_release,
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};
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static const struct config_item_type o2nm_node_type = {
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.ct_item_ops = &o2nm_node_item_ops,
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.ct_attrs = o2nm_node_attrs,
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.ct_owner = THIS_MODULE,
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};
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/* node set */
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struct o2nm_node_group {
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struct config_group ns_group;
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/* some stuff? */
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};
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#if 0
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static struct o2nm_node_group *to_o2nm_node_group(struct config_group *group)
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{
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return group ?
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container_of(group, struct o2nm_node_group, ns_group)
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: NULL;
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}
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#endif
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static ssize_t o2nm_cluster_attr_write(const char *page, ssize_t count,
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unsigned int *val)
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{
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unsigned long tmp;
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char *p = (char *)page;
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tmp = simple_strtoul(p, &p, 0);
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if (!p || (*p && (*p != '\n')))
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return -EINVAL;
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if (tmp == 0)
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return -EINVAL;
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if (tmp >= (u32)-1)
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return -ERANGE;
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*val = tmp;
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return count;
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}
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static ssize_t o2nm_cluster_idle_timeout_ms_show(struct config_item *item,
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char *page)
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{
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return sprintf(page, "%u\n", to_o2nm_cluster(item)->cl_idle_timeout_ms);
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}
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static ssize_t o2nm_cluster_idle_timeout_ms_store(struct config_item *item,
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const char *page, size_t count)
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{
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struct o2nm_cluster *cluster = to_o2nm_cluster(item);
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ssize_t ret;
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unsigned int val;
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ret = o2nm_cluster_attr_write(page, count, &val);
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if (ret > 0) {
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if (cluster->cl_idle_timeout_ms != val
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&& o2net_num_connected_peers()) {
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mlog(ML_NOTICE,
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"o2net: cannot change idle timeout after "
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"the first peer has agreed to it."
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" %d connected peers\n",
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o2net_num_connected_peers());
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ret = -EINVAL;
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} 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)
|