/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * Copyright (c) 2001-2003 Cluster File Systems, Inc.
+ * GPL HEADER START
*
- * This file is part of the Lustre file system, http://www.lustre.org
- * Lustre is a trademark of Cluster File Systems, Inc.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * 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.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * as published by the Free Software Foundation.
*
- * 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.
+ * 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 version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
*
- * 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.
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see [sun.com URL with a
+ * copy of GPLv2].
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ * GPL HEADER END
+ */
+/*
+ * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
+ *
+ * lustre/obdclass/genops.c
*
* These are the only exported functions, they provide some generic
* infrastructure for managing object devices
struct list_head obd_zombie_imports;
struct list_head obd_zombie_exports;
spinlock_t obd_zombie_impexp_lock;
-void (*obd_zombie_impexp_notify)(void) = NULL;
-EXPORT_SYMBOL(obd_zombie_impexp_notify);
-
+static void obd_zombie_impexp_notify(void);
int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
static void obd_device_free(struct obd_device *obd)
{
LASSERT(obd != NULL);
- LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC, "obd %p obd_magic %08x != %08x\n",
+ LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC, "obd %p obd_magic %08x != %08x\n",
obd, obd->obd_magic, OBD_DEVICE_MAGIC);
+ if (obd->obd_namespace != NULL) {
+ CERROR("obd %p: namespace %p was not properly cleaned up (obd_force=%d)!\n",
+ obd, obd->obd_namespace, obd->obd_force);
+ LBUG();
+ }
OBD_SLAB_FREE_PTR(obd, obd_device_cachep);
}
EXPORT_SYMBOL(obd_device_free);
#define CLASS_MAX_NAME 1024
-int class_register_type(struct obd_ops *dt_ops, struct md_ops *md_ops,
- struct lprocfs_vars *vars, const char *name,
+int class_register_type(struct obd_ops *dt_ops, struct md_ops *md_ops,
+ struct lprocfs_vars *vars, const char *name,
struct lu_device_type *ldt)
{
struct obd_type *type;
OBD_ALLOC_PTR(type->typ_dt_ops);
OBD_ALLOC_PTR(type->typ_md_ops);
OBD_ALLOC(type->typ_name, strlen(name) + 1);
-
- if (type->typ_dt_ops == NULL ||
- type->typ_md_ops == NULL ||
+
+ if (type->typ_dt_ops == NULL ||
+ type->typ_md_ops == NULL ||
type->typ_name == NULL)
GOTO (failed, rc);
RETURN(0);
} /* class_unregister_type */
+/**
+ * Create a new obd device.
+ *
+ * Find an empty slot in ::obd_devs[], create a new obd device in it.
+ *
+ * \param typename [in] obd device type string.
+ * \param name [in] obd device name.
+ *
+ * \retval NULL if create fails, otherwise return the obd device
+ * pointer created.
+ */
struct obd_device *class_newdev(const char *type_name, const char *name)
{
struct obd_device *result = NULL;
int i;
int new_obd_minor = 0;
- if (strlen(name) > MAX_OBD_NAME) {
+ if (strlen(name) >= MAX_OBD_NAME) {
CERROR("name/uuid must be < %u bytes long\n", MAX_OBD_NAME);
RETURN(ERR_PTR(-EINVAL));
}
- type = class_get_type(type_name);
+ type = class_get_type(type_name);
if (type == NULL){
CERROR("OBD: unknown type: %s\n", type_name);
RETURN(ERR_PTR(-ENODEV));
}
newdev = obd_device_alloc();
- if (newdev == NULL) {
+ if (newdev == NULL) {
class_put_type(type);
RETURN(ERR_PTR(-ENOMEM));
}
result->obd_minor = i;
new_obd_minor = i;
result->obd_type = type;
- memcpy(result->obd_name, name, strlen(name));
+ strncpy(result->obd_name, name,
+ sizeof(result->obd_name));
obd_devs[i] = result;
}
}
spin_unlock(&obd_dev_lock);
-
+
if (result == NULL && i >= class_devno_max()) {
CERROR("all %u OBD devices used, increase MAX_OBD_DEVICES\n",
class_devno_max());
result = ERR_PTR(-EOVERFLOW);
}
-
+
if (IS_ERR(result)) {
obd_device_free(newdev);
class_put_type(type);
return class_num2obd(dev);
}
+/**
+ * Get obd device from ::obd_devs[]
+ *
+ * \param num [in] array index
+ *
+ * \retval NULL if ::obd_devs[\a num] does not contains an obd device
+ * otherwise return the obd device there.
+ */
struct obd_device *class_num2obd(int num)
{
struct obd_device *obd = NULL;
if (num < class_devno_max()) {
obd = obd_devs[num];
- if (obd == NULL) {
+ if (obd == NULL)
return NULL;
- }
LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
"%p obd_magic %08x != %08x\n",
LASSERT(obd_device_cachep == NULL);
obd_device_cachep = cfs_mem_cache_create("ll_obd_dev_cache",
- sizeof(struct obd_device),
+ sizeof(struct obd_device),
0, 0);
if (!obd_device_cachep)
GOTO(out, -ENOMEM);
CDEBUG(D_IOCTL, "final put %p/%s\n",
exp, exp->exp_client_uuid.uuid);
-
+
spin_lock(&obd_zombie_impexp_lock);
list_add(&exp->exp_obd_chain, &obd_zombie_exports);
spin_unlock(&obd_zombie_impexp_lock);
ptlrpc_put_connection_superhack(exp->exp_connection);
LASSERT(list_empty(&exp->exp_outstanding_replies));
+ LASSERT(list_empty(&exp->exp_req_replay_queue));
obd_destroy_export(exp);
-
+
OBD_FREE_RCU(exp, sizeof(*exp), &exp->exp_handle);
class_decref(obd);
EXIT;
atomic_set(&export->exp_rpc_count, 0);
export->exp_obd = obd;
CFS_INIT_LIST_HEAD(&export->exp_outstanding_replies);
+ CFS_INIT_LIST_HEAD(&export->exp_req_replay_queue);
/* XXX this should be in LDLM init */
CFS_INIT_LIST_HEAD(&export->exp_ldlm_data.led_held_locks);
spin_lock_init(&export->exp_ldlm_data.led_lock);
spin_lock(&obd->obd_dev_lock);
if (!obd_uuid_equals(cluuid, &obd->obd_uuid)) {
- rc = lustre_hash_additem_unique(obd->obd_uuid_hash_body, cluuid,
+ rc = lustre_hash_additem_unique(obd->obd_uuid_hash_body, cluuid,
&export->exp_uuid_hash);
if (rc != 0) {
CWARN("%s: denying duplicate export for %s\n",
spin_lock(&exp->exp_obd->obd_dev_lock);
/* delete an uuid-export hashitem from hashtables */
if (!hlist_unhashed(&exp->exp_uuid_hash)) {
- lustre_hash_delitem(exp->exp_obd->obd_uuid_hash_body,
+ lustre_hash_delitem(exp->exp_obd->obd_uuid_hash_body,
&exp->exp_client_uuid, &exp->exp_uuid_hash);
}
list_del_init(&exp->exp_obd_chain);
if (atomic_dec_and_test(&import->imp_refcount)) {
CDEBUG(D_INFO, "final put import %p\n", import);
-
+
spin_lock(&obd_zombie_impexp_lock);
list_add(&import->imp_zombie_chain, &obd_zombie_imports);
spin_unlock(&obd_zombie_impexp_lock);
EXIT;
}
+EXPORT_SYMBOL(class_import_put);
void class_import_destroy(struct obd_import *import)
{
ENTRY;
-
+
CDEBUG(D_IOCTL, "destroying import %p for %s\n", import,
import->imp_obd->obd_name);
OBD_FREE_RCU(import, sizeof(*import), &import->imp_handle);
EXIT;
}
-EXPORT_SYMBOL(class_import_put);
+
+static void init_imp_at(struct imp_at *at) {
+ int i;
+ at_init(&at->iat_net_latency, 0, 0);
+ for (i = 0; i < IMP_AT_MAX_PORTALS; i++) {
+ /* max service estimates are tracked on the server side, so
+ don't use the AT history here, just use the last reported
+ val. (But keep hist for proc histogram, worst_ever) */
+ at_init(&at->iat_service_estimate[i], INITIAL_CONNECT_TIMEOUT,
+ AT_FLG_NOHIST);
+ }
+}
struct obd_import *class_new_import(struct obd_device *obd)
{
CFS_INIT_LIST_HEAD(&imp->imp_conn_list);
CFS_INIT_LIST_HEAD(&imp->imp_handle.h_link);
class_handle_hash(&imp->imp_handle, import_handle_addref);
+ init_imp_at(&imp->imp_at);
/* the default magic is V2, will be used in connect RPC, and
* then adjusted according to the flags in request/reply. */
exp->exp_lock_replay_needed = 0;
spin_unlock(&exp->exp_lock);
LASSERT(atomic_read(&obd->obd_lock_replay_clients));
- atomic_dec(&obd->obd_lock_replay_clients);
+ atomic_dec(&obd->obd_lock_replay_clients);
}
}
spin_unlock_bh(&obd->obd_processing_task_lock);
fake_exp->exp_flags = flags;
spin_unlock(&fake_exp->exp_lock);
+ CDEBUG(D_HA, "%s: disconnecting export at %s (%p), "
+ "last request at %ld\n",
+ exp->exp_obd->obd_name, obd_export_nid2str(exp),
+ exp, exp->exp_last_request_time);
rc = obd_disconnect(fake_exp);
class_export_put(exp);
- CDEBUG(D_HA, "disconnecting export %s (%p): rc %d\n",
- exp->exp_client_uuid.uuid, exp, rc);
}
EXIT;
}
list_add(&work_list, &obd->obd_exports);
list_del_init(&obd->obd_exports);
spin_unlock(&obd->obd_dev_lock);
-
+
if (!list_empty(&work_list)) {
CDEBUG(D_HA, "OBD device %d (%p) has exports, "
"disconnecting them\n", obd->obd_minor, obd);
- class_disconnect_export_list(&work_list,
+ class_disconnect_export_list(&work_list,
get_exp_flags_from_obd(obd));
} else
CDEBUG(D_HA, "OBD device %d (%p) has no exports\n",
exp = list_entry(pos, struct obd_export, exp_obd_chain);
if (test_export(exp))
continue;
-
+
list_del(&exp->exp_obd_chain);
list_add(&exp->exp_obd_chain, &work_list);
/* don't count self-export as client */
LASSERTF(doomed_exp->exp_connection->c_peer.nid == nid_key,
"nid %s found, wanted nid %s, requested nid %s\n",
obd_export_nid2str(doomed_exp),
- libcfs_nid2str(nid_key), nid);
+ libcfs_nid2str(nid_key), nid);
LASSERTF(doomed_exp != obd->obd_self_export,
"self-export is hashed by NID?\n");
exports_evicted++;
return exports_evicted;
}
- doomed_exp = lustre_hash_get_object_by_key(obd->obd_uuid_hash_body,
+ doomed_exp = lustre_hash_get_object_by_key(obd->obd_uuid_hash_body,
&doomed);
if (doomed_exp == NULL) {
}
EXPORT_SYMBOL(obd_export_evict_by_uuid);
-void obd_zombie_impexp_cull(void)
+/**
+ * kill zombie imports and exports
+ */
+void obd_zombie_impexp_cull(void)
{
struct obd_import *import;
struct obd_export *export;
ENTRY;
-
+
do {
spin_lock (&obd_zombie_impexp_lock);
imp_zombie_chain);
list_del(&import->imp_zombie_chain);
}
-
+
export = NULL;
if (!list_empty(&obd_zombie_exports)) {
export = list_entry(obd_zombie_exports.next,
}
spin_unlock(&obd_zombie_impexp_lock);
-
+
if (import != NULL)
class_import_destroy(import);
} while (import != NULL || export != NULL);
EXIT;
}
-EXPORT_SYMBOL(obd_zombie_impexp_cull);
-void obd_zombie_impexp_init(void)
+static struct completion obd_zombie_start;
+static struct completion obd_zombie_stop;
+static unsigned long obd_zombie_flags;
+static cfs_waitq_t obd_zombie_waitq;
+
+enum {
+ OBD_ZOMBIE_STOP = 1
+};
+
+/**
+ * check for work for kill zombie import/export thread.
+ */
+int obd_zombie_impexp_check(void *arg)
{
+ int rc;
+
+ spin_lock(&obd_zombie_impexp_lock);
+ rc = list_empty(&obd_zombie_imports) &&
+ list_empty(&obd_zombie_exports) &&
+ !test_bit(OBD_ZOMBIE_STOP, &obd_zombie_flags);
+
+ spin_unlock(&obd_zombie_impexp_lock);
+
+ RETURN(rc);
+}
+
+/**
+ * notify import/export destroy thread about new zombie.
+ */
+static void obd_zombie_impexp_notify(void)
+{
+ cfs_waitq_signal(&obd_zombie_waitq);
+}
+
+#ifdef __KERNEL__
+
+/**
+ * destroy zombie export/import thread.
+ */
+static int obd_zombie_impexp_thread(void *unused)
+{
+ int rc;
+
+ if ((rc = cfs_daemonize_ctxt("obd_zombid"))) {
+ complete(&obd_zombie_start);
+ RETURN(rc);
+ }
+
+ complete(&obd_zombie_start);
+
+ while(!test_bit(OBD_ZOMBIE_STOP, &obd_zombie_flags)) {
+ struct l_wait_info lwi = { 0 };
+
+ l_wait_event(obd_zombie_waitq, !obd_zombie_impexp_check(NULL), &lwi);
+
+ obd_zombie_impexp_cull();
+ }
+
+ complete(&obd_zombie_stop);
+
+ RETURN(0);
+}
+
+#else /* ! KERNEL */
+
+static atomic_t zombie_recur = ATOMIC_INIT(0);
+static void *obd_zombie_impexp_work_cb;
+static void *obd_zombie_impexp_idle_cb;
+
+int obd_zombie_impexp_kill(void *arg)
+{
+ int rc = 0;
+
+ if (atomic_inc_return(&zombie_recur) == 1) {
+ obd_zombie_impexp_cull();
+ rc = 1;
+ }
+ atomic_dec(&zombie_recur);
+ return rc;
+}
+
+#endif
+
+/**
+ * start destroy zombie import/export thread
+ */
+int obd_zombie_impexp_init(void)
+{
+ int rc;
+
CFS_INIT_LIST_HEAD(&obd_zombie_imports);
CFS_INIT_LIST_HEAD(&obd_zombie_exports);
spin_lock_init(&obd_zombie_impexp_lock);
+ init_completion(&obd_zombie_start);
+ init_completion(&obd_zombie_stop);
+ cfs_waitq_init(&obd_zombie_waitq);
+
+#ifdef __KERNEL__
+ rc = cfs_kernel_thread(obd_zombie_impexp_thread, NULL, 0);
+ if (rc < 0)
+ RETURN(rc);
+
+ wait_for_completion(&obd_zombie_start);
+#else
+
+ obd_zombie_impexp_work_cb =
+ liblustre_register_wait_callback("obd_zombi_impexp_kill",
+ &obd_zombie_impexp_kill, NULL);
+
+ obd_zombie_impexp_idle_cb =
+ liblustre_register_idle_callback("obd_zombi_impexp_check",
+ &obd_zombie_impexp_check, NULL);
+ rc = 0;
+
+#endif
+ RETURN(rc);
+}
+/**
+ * stop destroy zombie import/export thread
+ */
+void obd_zombie_impexp_stop(void)
+{
+ set_bit(OBD_ZOMBIE_STOP, &obd_zombie_flags);
+ obd_zombie_impexp_notify();
+#ifdef __KERNEL__
+ wait_for_completion(&obd_zombie_stop);
+#else
+ liblustre_deregister_wait_callback(obd_zombie_impexp_work_cb);
+ liblustre_deregister_idle_callback(obd_zombie_impexp_idle_cb);
+#endif
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff