*
* Copyright (C) 2002 Cluster File Systems, Inc.
*
- * This file is part of Lustre, http://www.lustre.org.
+ * This file is part of the Lustre file system, http://www.lustre.org
+ * Lustre is a trademark of Cluster File Systems, Inc.
*
- * Lustre is free software; you can redistribute it and/or
- * modify it under the terms of version 2 of the GNU General Public
- * License as published by the Free Software Foundation.
+ * You may have signed or agreed to another license before downloading
+ * this software. If so, you are bound by the terms and conditions
+ * of that agreement, and the following does not apply to you. See the
+ * LICENSE file included with this distribution for more information.
*
- * Lustre 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.
+ * If you did not agree to a different license, then this copy of Lustre
+ * is open source software; you can redistribute it and/or modify it
+ * under the terms of version 2 of the GNU General Public License as
+ * published by the Free Software Foundation.
*
- * You should have received a copy of the GNU General Public License
- * along with Lustre; if not, write to the Free Software
- * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * In either case, Lustre 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
+ * license text for more details.
*
*/
#define DEBUG_SUBSYSTEM S_RPC
+#ifdef __KERNEL__
+#include <obd_support.h>
+#include <obd_class.h>
+#include <lustre_net.h>
+#else
+#include <liblustre.h>
+#endif
-#include <linux/lustre_net.h>
+#include "ptlrpc_internal.h"
+#include <class_hash.h>
static spinlock_t conn_lock;
static struct list_head conn_list;
static struct list_head conn_unused_list;
+static struct lustre_class_hash_body *conn_hash_body;
+static struct lustre_class_hash_body *conn_unused_hash_body;
-struct ptlrpc_connection *ptlrpc_get_connection(struct lustre_peer *peer)
+extern struct lustre_hash_operations conn_hash_operations;
+
+void ptlrpc_dump_connections(void)
{
- struct list_head *tmp, *pos;
+ struct list_head *tmp;
struct ptlrpc_connection *c;
ENTRY;
- spin_lock(&conn_lock);
list_for_each(tmp, &conn_list) {
c = list_entry(tmp, struct ptlrpc_connection, c_link);
- if (memcmp(peer, &c->c_peer, sizeof(*peer)) == 0) {
- ptlrpc_connection_addref(c);
- GOTO(out, c);
- }
+ CERROR("Connection %p/%s has refcount %d (nid=%s->%s)\n",
+ c, c->c_remote_uuid.uuid, atomic_read(&c->c_refcount),
+ libcfs_nid2str(c->c_self),
+ libcfs_nid2str(c->c_peer.nid));
}
+ EXIT;
+}
- list_for_each_safe(tmp, pos, &conn_unused_list) {
- c = list_entry(tmp, struct ptlrpc_connection, c_link);
- if (memcmp(peer, &c->c_peer, sizeof(*peer)) == 0) {
- ptlrpc_connection_addref(c);
- list_del(&c->c_link);
- list_add(&c->c_link, &conn_list);
- GOTO(out, c);
- }
- }
+struct ptlrpc_connection*
+ptlrpc_lookup_conn_locked (lnet_process_id_t peer)
+{
+ struct ptlrpc_connection *c;
+
+ c = lustre_hash_get_object_by_key(conn_hash_body, &peer);
+ if (c != NULL)
+ return c;
+
+ c = lustre_hash_get_object_by_key(conn_unused_hash_body, &peer);
+ if (c != NULL)
+ return c;
+
+ return NULL;
+}
+
+
+struct ptlrpc_connection *ptlrpc_get_connection(lnet_process_id_t peer,
+ lnet_nid_t self, struct obd_uuid *uuid)
+{
+ struct ptlrpc_connection *c;
+ struct ptlrpc_connection *c2;
+ int rc = 0;
+ ENTRY;
+
+ CDEBUG(D_INFO, "self %s peer %s\n",
+ libcfs_nid2str(self), libcfs_id2str(peer));
+
+ spin_lock(&conn_lock);
+
+ c = ptlrpc_lookup_conn_locked(peer);
+
+ spin_unlock(&conn_lock);
- /* FIXME: this should be a slab once we can validate slab addresses
- * without OOPSing */
+ if (c != NULL)
+ RETURN (c);
+
OBD_ALLOC(c, sizeof(*c));
if (c == NULL)
- GOTO(out, c);
+ RETURN (NULL);
- c->c_level = LUSTRE_CONN_NEW;
- c->c_xid_in = 1;
- c->c_xid_out = 1;
- c->c_generation = 1;
- c->c_epoch = 1;
- c->c_bootcount = 0;
- atomic_set(&c->c_refcount, 0);
- ptlrpc_connection_addref(c);
- spin_lock_init(&c->c_lock);
+ atomic_set(&c->c_refcount, 1);
+ c->c_peer = peer;
+ c->c_self = self;
+ if (uuid != NULL)
+ obd_str2uuid(&c->c_remote_uuid, uuid->uuid);
- memcpy(&c->c_peer, peer, sizeof(c->c_peer));
- list_add(&c->c_link, &conn_list);
+ spin_lock(&conn_lock);
- EXIT;
- out:
+ c2 = ptlrpc_lookup_conn_locked(peer);
+ if (c2 == NULL) {
+ list_add(&c->c_link, &conn_list);
+ rc = lustre_hash_additem_unique(conn_hash_body, &peer,
+ &c->c_hash);
+ if (rc != 0) {
+ CERROR("Cannot add connection to conn_hash_body\n");
+ goto out_conn;
+ }
+ }
+
+out_conn:
spin_unlock(&conn_lock);
- return c;
+
+ if (c2 == NULL && rc == 0)
+ RETURN (c);
+
+ if (c != NULL)
+ OBD_FREE(c, sizeof(*c));
+
+ c2 = rc != 0 ? NULL : c2;
+ RETURN (c2);
}
int ptlrpc_put_connection(struct ptlrpc_connection *c)
{
int rc = 0;
+ lnet_process_id_t peer;
ENTRY;
- CDEBUG(D_INFO, "connection=%p\n", c);
- if (atomic_dec_and_test(&c->c_refcount)) {
+ if (c == NULL) {
+ CERROR("NULL connection\n");
+ RETURN(0);
+ }
+
+ peer = c->c_peer;
+
+ CDEBUG (D_INFO, "connection=%p refcount %d to %s\n",
+ c, atomic_read(&c->c_refcount) - 1,
+ libcfs_nid2str(c->c_peer.nid));
+
+ LASSERT(!hlist_unhashed(&c->c_hash));
+
+ if (atomic_dec_return(&c->c_refcount) == 1) {
+
spin_lock(&conn_lock);
+
+ lustre_hash_delitem(conn_hash_body, &peer, &c->c_hash);
list_del(&c->c_link);
+
list_add(&c->c_link, &conn_unused_list);
+ rc = lustre_hash_additem_unique(conn_unused_hash_body, &peer,
+ &c->c_hash);
+ if (rc != 0) {
+ spin_unlock(&conn_lock);
+ CERROR("Cannot hash connection to conn_hash_body\n");
+ GOTO(ret, rc);
+ }
+
spin_unlock(&conn_lock);
rc = 1;
- }
+
+ }
+
if (atomic_read(&c->c_refcount) < 0)
- CERROR("refcount < 0 for connection %p!\n", c);
+ CERROR("connection %p refcount %d!\n",
+ c, atomic_read(&c->c_refcount));
+ret :
RETURN(rc);
}
struct ptlrpc_connection *ptlrpc_connection_addref(struct ptlrpc_connection *c)
{
ENTRY;
- CDEBUG(D_INFO, "connection=%p\n", c);
atomic_inc(&c->c_refcount);
+ CDEBUG (D_INFO, "connection=%p refcount %d to %s\n",
+ c, atomic_read(&c->c_refcount),
+ libcfs_nid2str(c->c_peer.nid));
RETURN(c);
}
-void ptlrpc_init_connection(void)
+int ptlrpc_init_connection(void)
{
- INIT_LIST_HEAD(&conn_list);
- INIT_LIST_HEAD(&conn_unused_list);
- conn_lock = SPIN_LOCK_UNLOCKED;
+ int rc = 0;
+
+ CFS_INIT_LIST_HEAD(&conn_list);
+ rc = lustre_hash_init(&conn_hash_body, "CONN_HASH",
+ 128, &conn_hash_operations);
+ if (rc)
+ GOTO(ret, rc);
+
+ CFS_INIT_LIST_HEAD(&conn_unused_list);
+ rc = lustre_hash_init(&conn_unused_hash_body, "CONN_UNUSED_HASH",
+ 128, &conn_hash_operations);
+ if (rc)
+ GOTO(ret, rc);
+
+ spin_lock_init(&conn_lock);
+ret :
+ if (rc) {
+ lustre_hash_exit(&conn_hash_body);
+ lustre_hash_exit(&conn_unused_hash_body);
+ }
+ RETURN(rc);
}
void ptlrpc_cleanup_connection(void)
struct ptlrpc_connection *c;
spin_lock(&conn_lock);
+
+ lustre_hash_exit(&conn_unused_hash_body);
list_for_each_safe(tmp, pos, &conn_unused_list) {
c = list_entry(tmp, struct ptlrpc_connection, c_link);
list_del(&c->c_link);
OBD_FREE(c, sizeof(*c));
}
+
+ lustre_hash_exit(&conn_hash_body);
list_for_each_safe(tmp, pos, &conn_list) {
c = list_entry(tmp, struct ptlrpc_connection, c_link);
- CERROR("Connection %p has refcount %d at cleanup (nid=%lu)!\n",
- c, atomic_read(&c->c_refcount),
- (unsigned long)c->c_peer.peer_nid);
+ CERROR("Connection %p/%s has refcount %d (nid=%s)\n",
+ c, c->c_remote_uuid.uuid, atomic_read(&c->c_refcount),
+ libcfs_nid2str(c->c_peer.nid));
list_del(&c->c_link);
OBD_FREE(c, sizeof(*c));
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff