1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2002 Cluster File Systems, Inc.
6 * This file is part of the Lustre file system, http://www.lustre.org
7 * Lustre is a trademark of Cluster File Systems, Inc.
9 * You may have signed or agreed to another license before downloading
10 * this software. If so, you are bound by the terms and conditions
11 * of that agreement, and the following does not apply to you. See the
12 * LICENSE file included with this distribution for more information.
14 * If you did not agree to a different license, then this copy of Lustre
15 * is open source software; you can redistribute it and/or modify it
16 * under the terms of version 2 of the GNU General Public License as
17 * published by the Free Software Foundation.
19 * In either case, Lustre is distributed in the hope that it will be
20 * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
21 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 * license text for more details.
26 #define DEBUG_SUBSYSTEM S_RPC
28 #include <obd_support.h>
29 #include <obd_class.h>
30 #include <lustre_net.h>
32 #include <liblustre.h>
35 #include "ptlrpc_internal.h"
36 #include <class_hash.h>
38 static spinlock_t conn_lock;
39 static struct list_head conn_list;
40 static struct list_head conn_unused_list;
41 static struct lustre_class_hash_body *conn_hash_body;
42 static struct lustre_class_hash_body *conn_unused_hash_body;
44 extern struct lustre_hash_operations conn_hash_operations;
46 void ptlrpc_dump_connections(void)
48 struct list_head *tmp;
49 struct ptlrpc_connection *c;
52 list_for_each(tmp, &conn_list) {
53 c = list_entry(tmp, struct ptlrpc_connection, c_link);
54 CERROR("Connection %p/%s has refcount %d (nid=%s->%s)\n",
55 c, c->c_remote_uuid.uuid, atomic_read(&c->c_refcount),
56 libcfs_nid2str(c->c_self),
57 libcfs_nid2str(c->c_peer.nid));
62 struct ptlrpc_connection*
63 ptlrpc_lookup_conn_locked (lnet_process_id_t peer)
65 struct ptlrpc_connection *c;
67 c = lustre_hash_get_object_by_key(conn_hash_body, &peer);
71 c = lustre_hash_get_object_by_key(conn_unused_hash_body, &peer);
79 struct ptlrpc_connection *ptlrpc_get_connection(lnet_process_id_t peer,
80 lnet_nid_t self, struct obd_uuid *uuid)
82 struct ptlrpc_connection *c;
83 struct ptlrpc_connection *c2;
87 CDEBUG(D_INFO, "self %s peer %s\n",
88 libcfs_nid2str(self), libcfs_id2str(peer));
90 spin_lock(&conn_lock);
92 c = ptlrpc_lookup_conn_locked(peer);
94 spin_unlock(&conn_lock);
99 OBD_ALLOC(c, sizeof(*c));
103 atomic_set(&c->c_refcount, 1);
107 obd_str2uuid(&c->c_remote_uuid, uuid->uuid);
109 spin_lock(&conn_lock);
111 c2 = ptlrpc_lookup_conn_locked(peer);
113 list_add(&c->c_link, &conn_list);
114 rc = lustre_hash_additem_unique(conn_hash_body, &peer,
117 CERROR("Cannot add connection to conn_hash_body\n");
123 spin_unlock(&conn_lock);
125 if (c2 == NULL && rc == 0)
129 OBD_FREE(c, sizeof(*c));
131 c2 = rc != 0 ? NULL : c2;
135 int ptlrpc_put_connection(struct ptlrpc_connection *c)
138 lnet_process_id_t peer;
142 CERROR("NULL connection\n");
148 CDEBUG (D_INFO, "connection=%p refcount %d to %s\n",
149 c, atomic_read(&c->c_refcount) - 1,
150 libcfs_nid2str(c->c_peer.nid));
152 LASSERT(!hlist_unhashed(&c->c_hash));
154 if (atomic_dec_return(&c->c_refcount) == 1) {
156 spin_lock(&conn_lock);
158 lustre_hash_delitem(conn_hash_body, &peer, &c->c_hash);
159 list_del(&c->c_link);
161 list_add(&c->c_link, &conn_unused_list);
162 rc = lustre_hash_additem_unique(conn_unused_hash_body, &peer,
165 spin_unlock(&conn_lock);
166 CERROR("Cannot hash connection to conn_hash_body\n");
170 spin_unlock(&conn_lock);
175 if (atomic_read(&c->c_refcount) < 0)
176 CERROR("connection %p refcount %d!\n",
177 c, atomic_read(&c->c_refcount));
183 struct ptlrpc_connection *ptlrpc_connection_addref(struct ptlrpc_connection *c)
186 atomic_inc(&c->c_refcount);
187 CDEBUG (D_INFO, "connection=%p refcount %d to %s\n",
188 c, atomic_read(&c->c_refcount),
189 libcfs_nid2str(c->c_peer.nid));
193 int ptlrpc_init_connection(void)
197 CFS_INIT_LIST_HEAD(&conn_list);
198 rc = lustre_hash_init(&conn_hash_body, "CONN_HASH",
199 128, &conn_hash_operations);
203 CFS_INIT_LIST_HEAD(&conn_unused_list);
204 rc = lustre_hash_init(&conn_unused_hash_body, "CONN_UNUSED_HASH",
205 128, &conn_hash_operations);
209 spin_lock_init(&conn_lock);
212 lustre_hash_exit(&conn_hash_body);
213 lustre_hash_exit(&conn_unused_hash_body);
218 void ptlrpc_cleanup_connection(void)
220 struct list_head *tmp, *pos;
221 struct ptlrpc_connection *c;
223 spin_lock(&conn_lock);
225 lustre_hash_exit(&conn_unused_hash_body);
226 list_for_each_safe(tmp, pos, &conn_unused_list) {
227 c = list_entry(tmp, struct ptlrpc_connection, c_link);
228 list_del(&c->c_link);
229 OBD_FREE(c, sizeof(*c));
232 lustre_hash_exit(&conn_hash_body);
233 list_for_each_safe(tmp, pos, &conn_list) {
234 c = list_entry(tmp, struct ptlrpc_connection, c_link);
235 CERROR("Connection %p/%s has refcount %d (nid=%s)\n",
236 c, c->c_remote_uuid.uuid, atomic_read(&c->c_refcount),
237 libcfs_nid2str(c->c_peer.nid));
238 list_del(&c->c_link);
239 OBD_FREE(c, sizeof(*c));
241 spin_unlock(&conn_lock);