/* -*- 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 Lustre, http://www.lustre.org.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * 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.
+ * 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.
*
- * 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.
+ * 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).
*
- * 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.
+ * You should have received a copy of the GNU General Public License
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
+ *
+ * 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
*/
#define DEBUG_SUBSYSTEM S_CLASS
-#include <linux/kmod.h> /* for request_module() */
-#include <linux/module.h>
-#include <linux/obd_class.h>
-#include <linux/random.h>
-#include <linux/slab.h>
-#include <linux/lprocfs_status.h>
+#ifndef __KERNEL__
+#include <liblustre.h>
+#endif
+#include <obd_ost.h>
+#include <obd_class.h>
+#include <lprocfs_status.h>
+#include <class_hash.h>
extern struct list_head obd_types;
-kmem_cache_t *obdo_cachep = NULL;
-kmem_cache_t *import_cachep = NULL;
-kmem_cache_t *export_cachep = NULL;
+spinlock_t obd_types_lock;
+
+cfs_mem_cache_t *obd_device_cachep;
+cfs_mem_cache_t *obdo_cachep;
+EXPORT_SYMBOL(obdo_cachep);
+cfs_mem_cache_t *import_cachep;
+
+struct list_head obd_zombie_imports;
+struct list_head obd_zombie_exports;
+spinlock_t obd_zombie_impexp_lock;
+static void obd_zombie_impexp_notify(void);
+static void obd_zombie_export_add(struct obd_export *exp);
+static void obd_zombie_import_add(struct obd_import *imp);
int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
-void (*ptlrpc_abort_inflight_superhack)(struct obd_import *imp,
- int dying_import);
/*
* support functions: we could use inter-module communication, but this
* is more portable to other OS's
*/
-static struct obd_type *class_search_type(char *name)
+static struct obd_device *obd_device_alloc(void)
+{
+ struct obd_device *obd;
+
+ OBD_SLAB_ALLOC_PTR_GFP(obd, obd_device_cachep, CFS_ALLOC_IO);
+ if (obd != NULL) {
+ obd->obd_magic = OBD_DEVICE_MAGIC;
+ }
+ return obd;
+}
+EXPORT_SYMBOL(obd_device_alloc);
+
+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",
+ 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();
+ }
+ lu_ref_fini(&obd->obd_reference);
+ OBD_SLAB_FREE_PTR(obd, obd_device_cachep);
+}
+
+struct obd_type *class_search_type(const char *name)
{
struct list_head *tmp;
struct obd_type *type;
- CDEBUG(D_INFO, "SEARCH %s\n", name);
- tmp = &obd_types;
+ spin_lock(&obd_types_lock);
list_for_each(tmp, &obd_types) {
type = list_entry(tmp, struct obd_type, typ_chain);
- CDEBUG(D_INFO, "TYP %s\n", type->typ_name);
- if (strlen(type->typ_name) == strlen(name) &&
- strcmp(type->typ_name, name) == 0) {
+ if (strcmp(type->typ_name, name) == 0) {
+ spin_unlock(&obd_types_lock);
return type;
}
}
+ spin_unlock(&obd_types_lock);
return NULL;
}
-struct obd_type *class_get_type(char *name)
+struct obd_type *class_get_type(const char *name)
{
struct obd_type *type = class_search_type(name);
#ifdef CONFIG_KMOD
if (!type) {
- if (!request_module(name)) {
- CDEBUG(D_INFO, "Loaded module '%s'\n", name);
+ const char *modname = name;
+ if (!request_module(modname)) {
+ CDEBUG(D_INFO, "Loaded module '%s'\n", modname);
type = class_search_type(name);
- } else
- CDEBUG(D_INFO, "Can't load module '%s'\n", name);
+ } else {
+ LCONSOLE_ERROR_MSG(0x158, "Can't load module '%s'\n",
+ modname);
+ }
}
#endif
- if (type)
- __MOD_INC_USE_COUNT(type->typ_ops->o_owner);
+ if (type) {
+ spin_lock(&type->obd_type_lock);
+ type->typ_refcnt++;
+ try_module_get(type->typ_dt_ops->o_owner);
+ spin_unlock(&type->obd_type_lock);
+ }
return type;
}
void class_put_type(struct obd_type *type)
{
LASSERT(type);
- __MOD_DEC_USE_COUNT(type->typ_ops->o_owner);
+ spin_lock(&type->obd_type_lock);
+ type->typ_refcnt--;
+ module_put(type->typ_dt_ops->o_owner);
+ spin_unlock(&type->obd_type_lock);
}
-int class_register_type(struct obd_ops *ops, struct lprocfs_vars *vars,
- char *name)
+#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,
+ struct lu_device_type *ldt)
{
struct obd_type *type;
int rc = 0;
ENTRY;
- LASSERT(strnlen(name, 1024) < 1024); /* sanity check */
+ /* sanity check */
+ LASSERT(strnlen(name, CLASS_MAX_NAME) < CLASS_MAX_NAME);
if (class_search_type(name)) {
CDEBUG(D_IOCTL, "Type %s already registered\n", name);
if (type == NULL)
RETURN(rc);
- OBD_ALLOC(type->typ_ops, sizeof(*type->typ_ops));
+ 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_ops == NULL || type->typ_name == NULL)
+
+ if (type->typ_dt_ops == NULL ||
+ type->typ_md_ops == NULL ||
+ type->typ_name == NULL)
GOTO (failed, rc);
- *(type->typ_ops) = *ops;
+ *(type->typ_dt_ops) = *dt_ops;
+ /* md_ops is optional */
+ if (md_ops)
+ *(type->typ_md_ops) = *md_ops;
strcpy(type->typ_name, name);
- list_add(&type->typ_chain, &obd_types);
+ spin_lock_init(&type->obd_type_lock);
+#ifdef LPROCFS
type->typ_procroot = lprocfs_register(type->typ_name, proc_lustre_root,
vars, type);
if (IS_ERR(type->typ_procroot)) {
rc = PTR_ERR(type->typ_procroot);
type->typ_procroot = NULL;
- list_del(&type->typ_chain);
GOTO (failed, rc);
}
+#endif
+ if (ldt != NULL) {
+ type->typ_lu = ldt;
+ rc = lu_device_type_init(ldt);
+ if (rc != 0)
+ GOTO (failed, rc);
+ }
+
+ spin_lock(&obd_types_lock);
+ list_add(&type->typ_chain, &obd_types);
+ spin_unlock(&obd_types_lock);
RETURN (0);
failed:
- if (type->typ_ops != NULL)
+ if (type->typ_name != NULL)
OBD_FREE(type->typ_name, strlen(name) + 1);
- if (type->typ_ops != NULL)
- OBD_FREE (type->typ_ops, sizeof (*type->typ_ops));
+ if (type->typ_md_ops != NULL)
+ OBD_FREE_PTR(type->typ_md_ops);
+ if (type->typ_dt_ops != NULL)
+ OBD_FREE_PTR(type->typ_dt_ops);
+ OBD_FREE(type, sizeof(*type));
RETURN(rc);
}
-int class_unregister_type(char *name)
+int class_unregister_type(const char *name)
{
struct obd_type *type = class_search_type(name);
ENTRY;
CERROR("type %s has refcount (%d)\n", name, type->typ_refcnt);
/* This is a bad situation, let's make the best of it */
/* Remove ops, but leave the name for debugging */
- OBD_FREE(type->typ_ops, sizeof(*type->typ_ops));
+ OBD_FREE_PTR(type->typ_dt_ops);
+ OBD_FREE_PTR(type->typ_md_ops);
RETURN(-EBUSY);
}
if (type->typ_procroot) {
- lprocfs_remove(type->typ_procroot);
- type->typ_procroot = NULL;
+ lprocfs_remove(&type->typ_procroot);
}
+ if (type->typ_lu)
+ lu_device_type_fini(type->typ_lu);
+
+ spin_lock(&obd_types_lock);
list_del(&type->typ_chain);
+ spin_unlock(&obd_types_lock);
OBD_FREE(type->typ_name, strlen(name) + 1);
- if (type->typ_ops != NULL)
- OBD_FREE(type->typ_ops, sizeof(*type->typ_ops));
+ if (type->typ_dt_ops != NULL)
+ OBD_FREE_PTR(type->typ_dt_ops);
+ if (type->typ_md_ops != NULL)
+ OBD_FREE_PTR(type->typ_md_ops);
OBD_FREE(type, sizeof(*type));
RETURN(0);
} /* class_unregister_type */
-int class_name2dev(char *name)
+/**
+ * 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;
+ struct obd_device *newdev;
+ struct obd_type *type = NULL;
+ int i;
+ int new_obd_minor = 0;
+
+ 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);
+ if (type == NULL){
+ CERROR("OBD: unknown type: %s\n", type_name);
+ RETURN(ERR_PTR(-ENODEV));
+ }
+
+ newdev = obd_device_alloc();
+ if (newdev == NULL) {
+ class_put_type(type);
+ RETURN(ERR_PTR(-ENOMEM));
+ }
+ LASSERT(newdev->obd_magic == OBD_DEVICE_MAGIC);
+
+ spin_lock(&obd_dev_lock);
+ for (i = 0; i < class_devno_max(); i++) {
+ struct obd_device *obd = class_num2obd(i);
+ if (obd && obd->obd_name &&
+ (strcmp(name, obd->obd_name) == 0)) {
+ CERROR("Device %s already exists, won't add\n", name);
+ if (result) {
+ LASSERTF(result->obd_magic == OBD_DEVICE_MAGIC,
+ "%p obd_magic %08x != %08x\n", result,
+ result->obd_magic, OBD_DEVICE_MAGIC);
+ LASSERTF(result->obd_minor == new_obd_minor,
+ "%p obd_minor %d != %d\n", result,
+ result->obd_minor, new_obd_minor);
+
+ obd_devs[result->obd_minor] = NULL;
+ result->obd_name[0]='\0';
+ }
+ result = ERR_PTR(-EEXIST);
+ break;
+ }
+ if (!result && !obd) {
+ result = newdev;
+ result->obd_minor = i;
+ new_obd_minor = i;
+ result->obd_type = type;
+ strncpy(result->obd_name, name,
+ sizeof(result->obd_name) - 1);
+ 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);
+ } else {
+ CDEBUG(D_IOCTL, "Adding new device %s (%p)\n",
+ result->obd_name, result);
+ }
+ return result;
+}
+
+void class_release_dev(struct obd_device *obd)
+{
+ struct obd_type *obd_type = obd->obd_type;
+
+ LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC, "%p obd_magic %08x != %08x\n",
+ obd, obd->obd_magic, OBD_DEVICE_MAGIC);
+ LASSERTF(obd == obd_devs[obd->obd_minor], "obd %p != obd_devs[%d] %p\n",
+ obd, obd->obd_minor, obd_devs[obd->obd_minor]);
+ LASSERT(obd_type != NULL);
+
+ CDEBUG(D_INFO, "Release obd device %s obd_type name =%s\n",
+ obd->obd_name,obd->obd_type->typ_name);
+
+ spin_lock(&obd_dev_lock);
+ obd_devs[obd->obd_minor] = NULL;
+ spin_unlock(&obd_dev_lock);
+ obd_device_free(obd);
+
+ class_put_type(obd_type);
+}
+
+int class_name2dev(const char *name)
{
- int res = -1;
int i;
if (!name)
return -1;
- for (i = 0; i < MAX_OBD_DEVICES; i++) {
- struct obd_device *obd = &obd_dev[i];
- if (obd->obd_name && strcmp(name, obd->obd_name) == 0) {
- res = i;
- return res;
+ spin_lock(&obd_dev_lock);
+ for (i = 0; i < class_devno_max(); i++) {
+ struct obd_device *obd = class_num2obd(i);
+ if (obd && obd->obd_name && strcmp(name, obd->obd_name) == 0) {
+ /* Make sure we finished attaching before we give
+ out any references */
+ LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
+ if (obd->obd_attached) {
+ spin_unlock(&obd_dev_lock);
+ return i;
+ }
+ break;
}
}
+ spin_unlock(&obd_dev_lock);
+
+ return -1;
+}
+
+struct obd_device *class_name2obd(const char *name)
+{
+ int dev = class_name2dev(name);
- return res;
+ if (dev < 0 || dev > class_devno_max())
+ return NULL;
+ return class_num2obd(dev);
}
int class_uuid2dev(struct obd_uuid *uuid)
{
- int res = -1;
int i;
- for (i = 0; i < MAX_OBD_DEVICES; i++) {
- struct obd_device *obd = &obd_dev[i];
- if (strncmp(uuid->uuid, obd->obd_uuid.uuid, sizeof(obd->obd_uuid.uuid)) == 0) {
- res = i;
- return res;
+ spin_lock(&obd_dev_lock);
+ for (i = 0; i < class_devno_max(); i++) {
+ struct obd_device *obd = class_num2obd(i);
+ if (obd && obd_uuid_equals(uuid, &obd->obd_uuid)) {
+ LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
+ spin_unlock(&obd_dev_lock);
+ return i;
}
}
+ spin_unlock(&obd_dev_lock);
- return res;
+ return -1;
}
-
struct obd_device *class_uuid2obd(struct obd_uuid *uuid)
{
+ int dev = class_uuid2dev(uuid);
+ if (dev < 0)
+ return NULL;
+ 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)
+ return NULL;
+
+ LASSERTF(obd->obd_magic == OBD_DEVICE_MAGIC,
+ "%p obd_magic %08x != %08x\n",
+ obd, obd->obd_magic, OBD_DEVICE_MAGIC);
+ LASSERTF(obd->obd_minor == num,
+ "%p obd_minor %0d != %0d\n",
+ obd, obd->obd_minor, num);
+ }
+
+ return obd;
+}
+
+void class_obd_list(void)
+{
+ char *status;
+ int i;
+
+ spin_lock(&obd_dev_lock);
+ for (i = 0; i < class_devno_max(); i++) {
+ struct obd_device *obd = class_num2obd(i);
+ if (obd == NULL)
+ continue;
+ if (obd->obd_stopping)
+ status = "ST";
+ else if (obd->obd_set_up)
+ status = "UP";
+ else if (obd->obd_attached)
+ status = "AT";
+ else
+ status = "--";
+ LCONSOLE(D_CONFIG, "%3d %s %s %s %s %d\n",
+ i, status, obd->obd_type->typ_name,
+ obd->obd_name, obd->obd_uuid.uuid,
+ atomic_read(&obd->obd_refcount));
+ }
+ spin_unlock(&obd_dev_lock);
+ return;
+}
+
+/* Search for a client OBD connected to tgt_uuid. If grp_uuid is
+ specified, then only the client with that uuid is returned,
+ otherwise any client connected to the tgt is returned. */
+struct obd_device * class_find_client_obd(struct obd_uuid *tgt_uuid,
+ const char * typ_name,
+ struct obd_uuid *grp_uuid)
+{
int i;
- for (i = 0; i < MAX_OBD_DEVICES; i++) {
- struct obd_device *obd = &obd_dev[i];
- if (strncmp(uuid->uuid, obd->obd_uuid.uuid, sizeof(obd->obd_uuid.uuid)) == 0)
+ spin_lock(&obd_dev_lock);
+ for (i = 0; i < class_devno_max(); i++) {
+ struct obd_device *obd = class_num2obd(i);
+ if (obd == NULL)
+ continue;
+ if ((strncmp(obd->obd_type->typ_name, typ_name,
+ strlen(typ_name)) == 0)) {
+ if (obd_uuid_equals(tgt_uuid,
+ &obd->u.cli.cl_target_uuid) &&
+ ((grp_uuid)? obd_uuid_equals(grp_uuid,
+ &obd->obd_uuid) : 1)) {
+ spin_unlock(&obd_dev_lock);
+ return obd;
+ }
+ }
+ }
+ spin_unlock(&obd_dev_lock);
+
+ return NULL;
+}
+
+/* Iterate the obd_device list looking devices have grp_uuid. Start
+ searching at *next, and if a device is found, the next index to look
+ at is saved in *next. If next is NULL, then the first matching device
+ will always be returned. */
+struct obd_device * class_devices_in_group(struct obd_uuid *grp_uuid, int *next)
+{
+ int i;
+
+ if (next == NULL)
+ i = 0;
+ else if (*next >= 0 && *next < class_devno_max())
+ i = *next;
+ else
+ return NULL;
+
+ spin_lock(&obd_dev_lock);
+ for (; i < class_devno_max(); i++) {
+ struct obd_device *obd = class_num2obd(i);
+ if (obd == NULL)
+ continue;
+ if (obd_uuid_equals(grp_uuid, &obd->obd_uuid)) {
+ if (next != NULL)
+ *next = i+1;
+ spin_unlock(&obd_dev_lock);
return obd;
+ }
}
+ spin_unlock(&obd_dev_lock);
return NULL;
}
+/**
+ * to notify sptlrpc log for @fsname has changed, let every relevant OBD
+ * adjust sptlrpc settings accordingly.
+ */
+int class_notify_sptlrpc_conf(const char *fsname, int namelen)
+{
+ struct obd_device *obd;
+ const char *type;
+ int i, rc = 0, rc2;
+
+ LASSERT(namelen > 0);
+
+ spin_lock(&obd_dev_lock);
+ for (i = 0; i < class_devno_max(); i++) {
+ obd = class_num2obd(i);
+
+ if (obd == NULL || obd->obd_set_up == 0 || obd->obd_stopping)
+ continue;
+
+ /* only notify mdc, osc, mdt, ost */
+ type = obd->obd_type->typ_name;
+ if (strcmp(type, LUSTRE_MDC_NAME) != 0 &&
+ strcmp(type, LUSTRE_OSC_NAME) != 0 &&
+ strcmp(type, LUSTRE_MDT_NAME) != 0 &&
+ strcmp(type, LUSTRE_OST_NAME) != 0)
+ continue;
+
+ if (strncmp(obd->obd_name, fsname, namelen))
+ continue;
+
+ class_incref(obd, __FUNCTION__, obd);
+ spin_unlock(&obd_dev_lock);
+ rc2 = obd_set_info_async(obd->obd_self_export,
+ sizeof(KEY_SPTLRPC_CONF),
+ KEY_SPTLRPC_CONF, 0, NULL, NULL);
+ rc = rc ? rc : rc2;
+ class_decref(obd, __FUNCTION__, obd);
+ spin_lock(&obd_dev_lock);
+ }
+ spin_unlock(&obd_dev_lock);
+ return rc;
+}
+EXPORT_SYMBOL(class_notify_sptlrpc_conf);
+
void obd_cleanup_caches(void)
{
int rc;
+
ENTRY;
+ if (obd_device_cachep) {
+ rc = cfs_mem_cache_destroy(obd_device_cachep);
+ LASSERTF(rc == 0, "Cannot destropy ll_obd_device_cache: rc %d\n", rc);
+ obd_device_cachep = NULL;
+ }
if (obdo_cachep) {
- rc = kmem_cache_destroy(obdo_cachep);
- if (rc)
- CERROR("Cannot destory ll_obdo_cache\n");
+ rc = cfs_mem_cache_destroy(obdo_cachep);
+ LASSERTF(rc == 0, "Cannot destory ll_obdo_cache\n");
obdo_cachep = NULL;
}
if (import_cachep) {
- rc = kmem_cache_destroy(import_cachep);
- if (rc)
- CERROR("Cannot destory ll_import_cache\n");
+ rc = cfs_mem_cache_destroy(import_cachep);
+ LASSERTF(rc == 0, "Cannot destory ll_import_cache\n");
import_cachep = NULL;
}
- if (export_cachep) {
- rc = kmem_cache_destroy(export_cachep);
- if (rc)
- CERROR("Cannot destory ll_export_cache\n");
- export_cachep = NULL;
+ if (capa_cachep) {
+ rc = cfs_mem_cache_destroy(capa_cachep);
+ LASSERTF(rc == 0, "Cannot destory capa_cache\n");
+ capa_cachep = NULL;
}
EXIT;
}
int obd_init_caches(void)
{
ENTRY;
- LASSERT(obdo_cachep == NULL);
- obdo_cachep = kmem_cache_create("ll_obdo_cache", sizeof(struct obdo),
- 0, 0, NULL, NULL);
- if (!obdo_cachep)
+
+ LASSERT(obd_device_cachep == NULL);
+ obd_device_cachep = cfs_mem_cache_create("ll_obd_dev_cache",
+ sizeof(struct obd_device),
+ 0, 0);
+ if (!obd_device_cachep)
GOTO(out, -ENOMEM);
- LASSERT(export_cachep == NULL);
- export_cachep = kmem_cache_create("ll_export_cache",
- sizeof(struct obd_export),
- 0, 0, NULL, NULL);
- if (!export_cachep)
+ LASSERT(obdo_cachep == NULL);
+ obdo_cachep = cfs_mem_cache_create("ll_obdo_cache", sizeof(struct obdo),
+ 0, 0);
+ if (!obdo_cachep)
GOTO(out, -ENOMEM);
LASSERT(import_cachep == NULL);
- import_cachep = kmem_cache_create("ll_import_cache",
- sizeof(struct obd_import),
- 0, 0, NULL, NULL);
+ import_cachep = cfs_mem_cache_create("ll_import_cache",
+ sizeof(struct obd_import),
+ 0, 0);
if (!import_cachep)
GOTO(out, -ENOMEM);
+ LASSERT(capa_cachep == NULL);
+ capa_cachep = cfs_mem_cache_create("capa_cache",
+ sizeof(struct obd_capa), 0, 0);
+ if (!capa_cachep)
+ GOTO(out, -ENOMEM);
+
RETURN(0);
out:
obd_cleanup_caches();
RETURN(NULL);
}
- if (conn->addr == -1) { /* this means assign a new connection */
+ if (conn->cookie == -1) { /* this means assign a new connection */
CDEBUG(D_CACHE, "want a new connection\n");
RETURN(NULL);
}
- if (!conn->addr) {
- CDEBUG(D_CACHE, "looking for null addr\n");
- fixme();
- RETURN(NULL);
- }
-
- CDEBUG(D_IOCTL, "looking for export addr "LPX64" cookie "LPX64"\n",
- conn->addr, conn->cookie);
- export = (struct obd_export *) (unsigned long)conn->addr;
- if (!kmem_cache_validate(export_cachep, (void *)export))
- RETURN(NULL);
-
- if (export->exp_cookie != conn->cookie)
- RETURN(NULL);
+ CDEBUG(D_INFO, "looking for export cookie "LPX64"\n", conn->cookie);
+ export = class_handle2object(conn->cookie);
RETURN(export);
-} /* class_conn2export */
+}
+
+struct obd_device *class_exp2obd(struct obd_export *exp)
+{
+ if (exp)
+ return exp->exp_obd;
+ return NULL;
+}
struct obd_device *class_conn2obd(struct lustre_handle *conn)
{
struct obd_export *export;
export = class_conn2export(conn);
- if (export)
- return export->exp_obd;
- fixme();
+ if (export) {
+ struct obd_device *obd = export->exp_obd;
+ class_export_put(export);
+ return obd;
+ }
return NULL;
}
+struct obd_import *class_exp2cliimp(struct obd_export *exp)
+{
+ struct obd_device *obd = exp->exp_obd;
+ if (obd == NULL)
+ return NULL;
+ return obd->u.cli.cl_import;
+}
+
struct obd_import *class_conn2cliimp(struct lustre_handle *conn)
{
- return &class_conn2obd(conn)->u.cli.cl_import;
+ struct obd_device *obd = class_conn2obd(conn);
+ if (obd == NULL)
+ return NULL;
+ return obd->u.cli.cl_import;
}
-struct obd_import *class_conn2ldlmimp(struct lustre_handle *conn)
+/* Export management functions */
+static void class_export_destroy(struct obd_export *exp)
{
- return &class_conn2export(conn)->exp_ldlm_data.led_import;
+ struct obd_device *obd = exp->exp_obd;
+ ENTRY;
+
+ LASSERT (atomic_read(&exp->exp_refcount) == 0);
+
+ CDEBUG(D_IOCTL, "destroying export %p/%s for %s\n", exp,
+ exp->exp_client_uuid.uuid, obd->obd_name);
+
+ LASSERT(obd != NULL);
+
+ /* "Local" exports (lctl, LOV->{mdc,osc}) have no connection. */
+ if (exp->exp_connection)
+ ptlrpc_put_connection_superhack(exp->exp_connection);
+
+ LASSERT(list_empty(&exp->exp_outstanding_replies));
+ LASSERT(list_empty(&exp->exp_uncommitted_replies));
+ LASSERT(list_empty(&exp->exp_req_replay_queue));
+ LASSERT(list_empty(&exp->exp_queued_rpc));
+ obd_destroy_export(exp);
+ class_decref(obd, "export", exp);
+
+ OBD_FREE_RCU(exp, sizeof(*exp), &exp->exp_handle);
+ EXIT;
}
-struct obd_export *class_new_export(struct obd_device *obddev)
+static void export_handle_addref(void *export)
{
- struct obd_export * export;
+ class_export_get(export);
+}
- export = kmem_cache_alloc(export_cachep, GFP_KERNEL);
- if (!export) {
- CERROR("no memory! (minor %d)\n", obddev->obd_minor);
- return NULL;
+struct obd_export *class_export_get(struct obd_export *exp)
+{
+ atomic_inc(&exp->exp_refcount);
+ CDEBUG(D_INFO, "GETting export %p : new refcount %d\n", exp,
+ atomic_read(&exp->exp_refcount));
+ return exp;
+}
+EXPORT_SYMBOL(class_export_get);
+
+void class_export_put(struct obd_export *exp)
+{
+ LASSERT(exp != NULL);
+ CDEBUG(D_INFO, "PUTting export %p : new refcount %d\n", exp,
+ atomic_read(&exp->exp_refcount) - 1);
+ LASSERT(atomic_read(&exp->exp_refcount) > 0);
+ LASSERT(atomic_read(&exp->exp_refcount) < 0x5a5a5a);
+
+ if (atomic_dec_and_test(&exp->exp_refcount)) {
+ CDEBUG(D_IOCTL, "final put %p/%s\n",
+ exp, exp->exp_client_uuid.uuid);
+ obd_zombie_export_add(exp);
}
+}
+EXPORT_SYMBOL(class_export_put);
+
+/* Creates a new export, adds it to the hash table, and returns a
+ * pointer to it. The refcount is 2: one for the hash reference, and
+ * one for the pointer returned by this function. */
+struct obd_export *class_new_export(struct obd_device *obd,
+ struct obd_uuid *cluuid)
+{
+ struct obd_export *export;
+ int rc = 0;
- memset(export, 0, sizeof(*export));
- get_random_bytes(&export->exp_cookie, sizeof(export->exp_cookie));
- export->exp_obd = obddev;
- /* XXX this should be in LDLM init */
- INIT_LIST_HEAD(&export->exp_ldlm_data.led_held_locks);
- INIT_LIST_HEAD(&export->exp_conn_chain);
- spin_lock(&obddev->obd_dev_lock);
+ OBD_ALLOC_PTR(export);
+ if (!export)
+ return ERR_PTR(-ENOMEM);
+
+ export->exp_conn_cnt = 0;
+ export->exp_lock_hash = NULL;
+ atomic_set(&export->exp_refcount, 2);
+ atomic_set(&export->exp_rpc_count, 0);
+ export->exp_obd = obd;
+ CFS_INIT_LIST_HEAD(&export->exp_outstanding_replies);
+ spin_lock_init(&export->exp_uncommitted_replies_lock);
+ CFS_INIT_LIST_HEAD(&export->exp_uncommitted_replies);
+ CFS_INIT_LIST_HEAD(&export->exp_req_replay_queue);
+ CFS_INIT_LIST_HEAD(&export->exp_handle.h_link);
+ CFS_INIT_LIST_HEAD(&export->exp_queued_rpc);
+ class_handle_hash(&export->exp_handle, export_handle_addref);
+ export->exp_last_request_time = cfs_time_current_sec();
+ spin_lock_init(&export->exp_lock);
+ INIT_HLIST_NODE(&export->exp_uuid_hash);
+ INIT_HLIST_NODE(&export->exp_nid_hash);
+
+ export->exp_sp_peer = LUSTRE_SP_ANY;
+ export->exp_flvr.sf_rpc = SPTLRPC_FLVR_INVALID;
+ export->exp_client_uuid = *cluuid;
+ obd_init_export(export);
+
+ spin_lock(&obd->obd_dev_lock);
+ if (!obd_uuid_equals(cluuid, &obd->obd_uuid)) {
+ rc = lustre_hash_add_unique(obd->obd_uuid_hash, cluuid,
+ &export->exp_uuid_hash);
+ if (rc != 0) {
+ LCONSOLE_WARN("%s: denying duplicate export for %s, %d\n",
+ obd->obd_name, cluuid->uuid, rc);
+ spin_unlock(&obd->obd_dev_lock);
+ class_handle_unhash(&export->exp_handle);
+ OBD_FREE_PTR(export);
+ return ERR_PTR(-EALREADY);
+ }
+ }
+
+ LASSERT(!obd->obd_stopping); /* shouldn't happen, but might race */
+ class_incref(obd, "export", export);
list_add(&export->exp_obd_chain, &export->exp_obd->obd_exports);
- spin_unlock(&obddev->obd_dev_lock);
+ list_add_tail(&export->exp_obd_chain_timed,
+ &export->exp_obd->obd_exports_timed);
+ export->exp_obd->obd_num_exports++;
+ spin_unlock(&obd->obd_dev_lock);
+
return export;
}
+EXPORT_SYMBOL(class_new_export);
-void class_destroy_export(struct obd_export *exp)
+void class_unlink_export(struct obd_export *exp)
{
- ENTRY;
-
- LASSERT(exp->exp_cookie != DEAD_HANDLE_MAGIC);
+ class_handle_unhash(&exp->exp_handle);
spin_lock(&exp->exp_obd->obd_dev_lock);
- list_del(&exp->exp_obd_chain);
+ /* delete an uuid-export hashitem from hashtables */
+ if (!hlist_unhashed(&exp->exp_uuid_hash))
+ lustre_hash_del(exp->exp_obd->obd_uuid_hash,
+ &exp->exp_client_uuid,
+ &exp->exp_uuid_hash);
+
+ list_del_init(&exp->exp_obd_chain);
+ list_del_init(&exp->exp_obd_chain_timed);
+ exp->exp_obd->obd_num_exports--;
spin_unlock(&exp->exp_obd->obd_dev_lock);
- /* XXXshaver no connection here... */
- if (exp->exp_connection)
- spin_lock(&exp->exp_connection->c_lock);
- list_del(&exp->exp_conn_chain);
- if (exp->exp_connection) {
- spin_unlock(&exp->exp_connection->c_lock);
- ptlrpc_put_connection_superhack(exp->exp_connection);
- }
+ /* Keep these counter valid always */
+ spin_lock_bh(&exp->exp_obd->obd_processing_task_lock);
+ if (exp->exp_delayed)
+ exp->exp_obd->obd_delayed_clients--;
+ else if (exp->exp_in_recovery)
+ exp->exp_obd->obd_recoverable_clients--;
+ else if (exp->exp_obd->obd_recovering)
+ exp->exp_obd->obd_max_recoverable_clients--;
+ spin_unlock_bh(&exp->exp_obd->obd_processing_task_lock);
+ class_export_put(exp);
+}
+EXPORT_SYMBOL(class_unlink_export);
+
+/* Import management functions */
+void class_import_destroy(struct obd_import *imp)
+{
+ ENTRY;
+
+ CDEBUG(D_IOCTL, "destroying import %p for %s\n", imp,
+ imp->imp_obd->obd_name);
- /* Abort any inflight DLM requests and NULL out their (about to be
- * freed) import. */
- if (exp->exp_ldlm_data.led_import.imp_obd)
- ptlrpc_abort_inflight_superhack(&exp->exp_ldlm_data.led_import,
- 1);
+ LASSERT(atomic_read(&imp->imp_refcount) == 0);
- exp->exp_cookie = DEAD_HANDLE_MAGIC;
- kmem_cache_free(export_cachep, exp);
+ ptlrpc_put_connection_superhack(imp->imp_connection);
+ while (!list_empty(&imp->imp_conn_list)) {
+ struct obd_import_conn *imp_conn;
+
+ imp_conn = list_entry(imp->imp_conn_list.next,
+ struct obd_import_conn, oic_item);
+ list_del_init(&imp_conn->oic_item);
+ ptlrpc_put_connection_superhack(imp_conn->oic_conn);
+ OBD_FREE(imp_conn, sizeof(*imp_conn));
+ }
+
+ LASSERT(imp->imp_sec == NULL);
+ class_decref(imp->imp_obd, "import", imp);
+ OBD_FREE_RCU(imp, sizeof(*imp), &imp->imp_handle);
EXIT;
}
-/* a connection defines an export context in which preallocation can
- be managed. */
-int class_connect(struct lustre_handle *conn, struct obd_device *obd,
- struct obd_uuid *cluuid)
+static void import_handle_addref(void *import)
{
- struct obd_export * export;
- if (conn == NULL) {
- LBUG();
- return -EINVAL;
- }
+ class_import_get(import);
+}
- if (obd == NULL) {
- LBUG();
- return -EINVAL;
+struct obd_import *class_import_get(struct obd_import *import)
+{
+ LASSERT(atomic_read(&import->imp_refcount) >= 0);
+ LASSERT(atomic_read(&import->imp_refcount) < 0x5a5a5a);
+ atomic_inc(&import->imp_refcount);
+ CDEBUG(D_INFO, "import %p refcount=%d obd=%s\n", import,
+ atomic_read(&import->imp_refcount),
+ import->imp_obd->obd_name);
+ return import;
+}
+EXPORT_SYMBOL(class_import_get);
+
+void class_import_put(struct obd_import *imp)
+{
+ ENTRY;
+
+ LASSERT(atomic_read(&imp->imp_refcount) > 0);
+ LASSERT(atomic_read(&imp->imp_refcount) < 0x5a5a5a);
+ LASSERT(list_empty(&imp->imp_zombie_chain));
+
+ CDEBUG(D_INFO, "import %p refcount=%d obd=%s\n", imp,
+ atomic_read(&imp->imp_refcount) - 1,
+ imp->imp_obd->obd_name);
+
+ if (atomic_dec_and_test(&imp->imp_refcount)) {
+ CDEBUG(D_INFO, "final put import %p\n", imp);
+ obd_zombie_import_add(imp);
}
- if (cluuid == NULL) {
- LBUG();
- return -EINVAL;
+ 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);
}
+}
- export = class_new_export(obd);
- if (!export)
- return -ENOMEM;
+struct obd_import *class_new_import(struct obd_device *obd)
+{
+ struct obd_import *imp;
- conn->addr = (__u64) (unsigned long)export;
- conn->cookie = export->exp_cookie;
- memcpy(&export->exp_client_uuid, cluuid, sizeof(export->exp_client_uuid));
+ OBD_ALLOC(imp, sizeof(*imp));
+ if (imp == NULL)
+ return NULL;
- CDEBUG(D_IOCTL, "connect: addr %Lx cookie %Lx\n",
- (long long)conn->addr, (long long)conn->cookie);
- return 0;
+ CFS_INIT_LIST_HEAD(&imp->imp_zombie_chain);
+ CFS_INIT_LIST_HEAD(&imp->imp_replay_list);
+ CFS_INIT_LIST_HEAD(&imp->imp_sending_list);
+ CFS_INIT_LIST_HEAD(&imp->imp_delayed_list);
+ spin_lock_init(&imp->imp_lock);
+ imp->imp_last_success_conn = 0;
+ imp->imp_state = LUSTRE_IMP_NEW;
+ imp->imp_obd = class_incref(obd, "import", imp);
+ sema_init(&imp->imp_sec_mutex, 1);
+ cfs_waitq_init(&imp->imp_recovery_waitq);
+
+ atomic_set(&imp->imp_refcount, 2);
+ atomic_set(&imp->imp_unregistering, 0);
+ atomic_set(&imp->imp_inflight, 0);
+ atomic_set(&imp->imp_replay_inflight, 0);
+ atomic_set(&imp->imp_inval_count, 0);
+ 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. */
+ imp->imp_msg_magic = LUSTRE_MSG_MAGIC_V2;
+
+ return imp;
}
+EXPORT_SYMBOL(class_new_import);
-int class_disconnect(struct lustre_handle *conn)
+void class_destroy_import(struct obd_import *import)
+{
+ LASSERT(import != NULL);
+ LASSERT(import != LP_POISON);
+
+ class_handle_unhash(&import->imp_handle);
+
+ spin_lock(&import->imp_lock);
+ import->imp_generation++;
+ spin_unlock(&import->imp_lock);
+ class_import_put(import);
+}
+EXPORT_SYMBOL(class_destroy_import);
+
+/* A connection defines an export context in which preallocation can
+ be managed. This releases the export pointer reference, and returns
+ the export handle, so the export refcount is 1 when this function
+ returns. */
+int class_connect(struct lustre_handle *conn, struct obd_device *obd,
+ struct obd_uuid *cluuid)
{
struct obd_export *export;
+ LASSERT(conn != NULL);
+ LASSERT(obd != NULL);
+ LASSERT(cluuid != NULL);
+ ENTRY;
+
+ export = class_new_export(obd, cluuid);
+ if (IS_ERR(export))
+ RETURN(PTR_ERR(export));
+
+ conn->cookie = export->exp_handle.h_cookie;
+ class_export_put(export);
+
+ CDEBUG(D_IOCTL, "connect: client %s, cookie "LPX64"\n",
+ cluuid->uuid, conn->cookie);
+ RETURN(0);
+}
+EXPORT_SYMBOL(class_connect);
+
+/* if export is involved in recovery then clean up related things */
+void class_export_recovery_cleanup(struct obd_export *exp)
+{
+ struct obd_device *obd = exp->exp_obd;
+
+ spin_lock_bh(&obd->obd_processing_task_lock);
+ if (obd->obd_recovering && exp->exp_in_recovery) {
+ spin_lock(&exp->exp_lock);
+ exp->exp_in_recovery = 0;
+ spin_unlock(&exp->exp_lock);
+ obd->obd_connected_clients--;
+ /* each connected client is counted as recoverable */
+ obd->obd_recoverable_clients--;
+ if (exp->exp_req_replay_needed) {
+ spin_lock(&exp->exp_lock);
+ exp->exp_req_replay_needed = 0;
+ spin_unlock(&exp->exp_lock);
+ LASSERT(atomic_read(&obd->obd_req_replay_clients));
+ atomic_dec(&obd->obd_req_replay_clients);
+ }
+ if (exp->exp_lock_replay_needed) {
+ spin_lock(&exp->exp_lock);
+ 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);
+ }
+ }
+ spin_unlock_bh(&obd->obd_processing_task_lock);
+}
+
+/* This function removes 1-3 references from the export:
+ * 1 - for export pointer passed
+ * and if disconnect really need
+ * 2 - removing from hash
+ * 3 - in client_unlink_export
+ * The export pointer passed to this function can destroyed */
+int class_disconnect(struct obd_export *export)
+{
+ int already_disconnected;
ENTRY;
- if (!(export = class_conn2export(conn))) {
+ if (export == NULL) {
fixme();
- CDEBUG(D_IOCTL, "disconnect: attempting to free "
- "nonexistent client "LPX64"\n", conn->addr);
+ CDEBUG(D_IOCTL, "attempting to free NULL export %p\n", export);
RETURN(-EINVAL);
}
- CDEBUG(D_IOCTL, "disconnect: addr %Lx cookie %Lx\n",
- (long long)conn->addr, (long long)conn->cookie);
+ spin_lock(&export->exp_lock);
+ already_disconnected = export->exp_disconnected;
+ export->exp_disconnected = 1;
+ spin_unlock(&export->exp_lock);
+
+ /* class_cleanup(), abort_recovery(), and class_fail_export()
+ * all end up in here, and if any of them race we shouldn't
+ * call extra class_export_puts(). */
+ if (already_disconnected) {
+ LASSERT(hlist_unhashed(&export->exp_nid_hash));
+ GOTO(no_disconn, already_disconnected);
+ }
- class_destroy_export(export);
+ CDEBUG(D_IOCTL, "disconnect: cookie "LPX64"\n",
+ export->exp_handle.h_cookie);
+ if (!hlist_unhashed(&export->exp_nid_hash))
+ lustre_hash_del(export->exp_obd->obd_nid_hash,
+ &export->exp_connection->c_peer.nid,
+ &export->exp_nid_hash);
+
+ class_export_recovery_cleanup(export);
+ class_unlink_export(export);
+no_disconn:
+ class_export_put(export);
RETURN(0);
}
-void class_disconnect_all(struct obd_device *obddev)
+static void class_disconnect_export_list(struct list_head *list,
+ enum obd_option flags)
{
- int again = 1;
-
- while (again) {
- spin_lock(&obddev->obd_dev_lock);
- if (!list_empty(&obddev->obd_exports)) {
- struct obd_export *export;
- struct lustre_handle conn;
- int rc;
+ int rc;
+ struct obd_export *exp;
+ ENTRY;
- export = list_entry(obddev->obd_exports.next,
- struct obd_export,
- exp_obd_chain);
- conn.addr = (__u64)(unsigned long)export;
- conn.cookie = export->exp_cookie;
- spin_unlock(&obddev->obd_dev_lock);
- CERROR("force disconnecting %s:%s export %p\n",
- export->exp_obd->obd_type->typ_name,
- export->exp_connection ?
- (char *)export->exp_connection->c_remote_uuid.uuid :
- "<unconnected>", export);
- rc = obd_disconnect(&conn);
- if (rc < 0) {
- /* AED: not so sure about this... We can't
- * loop here forever, yet we shouldn't leak
- * exports on a struct we will soon destroy.
- */
- CERROR("destroy export %p with err: rc = %d\n",
- export, rc);
- class_destroy_export(export);
- }
- } else {
- spin_unlock(&obddev->obd_dev_lock);
- again = 0;
+ /* It's possible that an export may disconnect itself, but
+ * nothing else will be added to this list. */
+ while (!list_empty(list)) {
+ exp = list_entry(list->next, struct obd_export, exp_obd_chain);
+ /* need for safe call CDEBUG after obd_disconnect */
+ class_export_get(exp);
+
+ spin_lock(&exp->exp_lock);
+ exp->exp_flags = flags;
+ spin_unlock(&exp->exp_lock);
+
+ if (obd_uuid_equals(&exp->exp_client_uuid,
+ &exp->exp_obd->obd_uuid)) {
+ CDEBUG(D_HA,
+ "exp %p export uuid == obd uuid, don't discon\n",
+ exp);
+ /* Need to delete this now so we don't end up pointing
+ * to work_list later when this export is cleaned up. */
+ list_del_init(&exp->exp_obd_chain);
+ class_export_put(exp);
+ continue;
}
+
+ class_export_get(exp);
+ CDEBUG(D_HA, "%s: disconnecting export at %s (%p), "
+ "last request at "CFS_TIME_T"\n",
+ exp->exp_obd->obd_name, obd_export_nid2str(exp),
+ exp, exp->exp_last_request_time);
+ /* release one export reference anyway */
+ rc = obd_disconnect(exp);
+
+ CDEBUG(D_HA, "disconnected export at %s (%p): rc %d\n",
+ obd_export_nid2str(exp), exp, rc);
+ class_export_put(exp);
}
+ EXIT;
}
-#if 0
+void class_disconnect_exports(struct obd_device *obd)
+{
+ struct list_head work_list;
+ ENTRY;
+
+ /* Move all of the exports from obd_exports to a work list, en masse. */
+ CFS_INIT_LIST_HEAD(&work_list);
+ spin_lock(&obd->obd_dev_lock);
+ list_splice_init(&obd->obd_exports, &work_list);
+ list_splice_init(&obd->obd_delayed_exports, &work_list);
+ 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,
+ exp_flags_from_obd(obd));
+ } else
+ CDEBUG(D_HA, "OBD device %d (%p) has no exports\n",
+ obd->obd_minor, obd);
+ EXIT;
+}
+EXPORT_SYMBOL(class_disconnect_exports);
-/* FIXME: Data is a space- or comma-separated list of device IDs. This will
- * have to change. */
-int class_multi_setup(struct obd_device *obddev, uint32_t len, void *data)
+/* Remove exports that have not completed recovery.
+ */
+void class_disconnect_stale_exports(struct obd_device *obd,
+ int (*test_export)(struct obd_export *),
+ enum obd_option flags)
{
- int count, rc;
- char *p;
+ struct list_head work_list;
+ struct list_head *pos, *n;
+ struct obd_export *exp;
ENTRY;
- for (p = data, count = 0; p < (char *)data + len; count++) {
- char *end;
- int tmp = simple_strtoul(p, &end, 0);
+ CFS_INIT_LIST_HEAD(&work_list);
+ spin_lock(&obd->obd_dev_lock);
+ obd->obd_stale_clients = 0;
+ list_for_each_safe(pos, n, &obd->obd_exports) {
+ exp = list_entry(pos, struct obd_export, exp_obd_chain);
+ if (test_export(exp))
+ continue;
+
+ list_move(&exp->exp_obd_chain, &work_list);
+ /* don't count self-export as client */
+ if (obd_uuid_equals(&exp->exp_client_uuid,
+ &exp->exp_obd->obd_uuid))
+ continue;
+
+ obd->obd_stale_clients++;
+ CDEBUG(D_ERROR, "%s: disconnect stale client %s@%s\n",
+ obd->obd_name, exp->exp_client_uuid.uuid,
+ exp->exp_connection == NULL ? "<unknown>" :
+ libcfs_nid2str(exp->exp_connection->c_peer.nid));
+ }
+ spin_unlock(&obd->obd_dev_lock);
- if (p == end) {
- CERROR("invalid device ID starting at: %s\n", p);
- GOTO(err_disconnect, rc = -EINVAL);
- }
+ CDEBUG(D_HA, "%s: disconnecting %d stale clients\n", obd->obd_name,
+ obd->obd_stale_clients);
+
+ class_disconnect_export_list(&work_list, flags);
+ EXIT;
+}
+EXPORT_SYMBOL(class_disconnect_stale_exports);
+
+void class_fail_export(struct obd_export *exp)
+{
+ int rc, already_failed;
+
+ spin_lock(&exp->exp_lock);
+ already_failed = exp->exp_failed;
+ exp->exp_failed = 1;
+ spin_unlock(&exp->exp_lock);
+
+ if (already_failed) {
+ CDEBUG(D_HA, "disconnecting dead export %p/%s; skipping\n",
+ exp, exp->exp_client_uuid.uuid);
+ return;
+ }
+
+ CDEBUG(D_HA, "disconnecting export %p/%s\n",
+ exp, exp->exp_client_uuid.uuid);
+
+ if (obd_dump_on_timeout)
+ libcfs_debug_dumplog();
+
+ /* Most callers into obd_disconnect are removing their own reference
+ * (request, for example) in addition to the one from the hash table.
+ * We don't have such a reference here, so make one. */
+ class_export_get(exp);
+ rc = obd_disconnect(exp);
+ if (rc)
+ CERROR("disconnecting export %p failed: %d\n", exp, rc);
+ else
+ CDEBUG(D_HA, "disconnected export %p/%s\n",
+ exp, exp->exp_client_uuid.uuid);
+}
+EXPORT_SYMBOL(class_fail_export);
+
+char *obd_export_nid2str(struct obd_export *exp)
+{
+ if (exp->exp_connection != NULL)
+ return libcfs_nid2str(exp->exp_connection->c_peer.nid);
+
+ return "(no nid)";
+}
+EXPORT_SYMBOL(obd_export_nid2str);
+
+int obd_export_evict_by_nid(struct obd_device *obd, const char *nid)
+{
+ struct obd_export *doomed_exp = NULL;
+ int exports_evicted = 0;
+
+ lnet_nid_t nid_key = libcfs_str2nid((char *)nid);
+
+ do {
+ doomed_exp = lustre_hash_lookup(obd->obd_nid_hash, &nid_key);
+ if (doomed_exp == NULL)
+ break;
+
+ 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);
+ LASSERTF(doomed_exp != obd->obd_self_export,
+ "self-export is hashed by NID?\n");
+ exports_evicted++;
+ CWARN("%s: evict NID '%s' (%s) #%d at adminstrative request\n",
+ obd->obd_name, nid, doomed_exp->exp_client_uuid.uuid,
+ exports_evicted);
+ class_fail_export(doomed_exp);
+ class_export_put(doomed_exp);
+ } while (1);
+
+ if (!exports_evicted)
+ CDEBUG(D_HA,"%s: can't disconnect NID '%s': no exports found\n",
+ obd->obd_name, nid);
+ return exports_evicted;
+}
+EXPORT_SYMBOL(obd_export_evict_by_nid);
+
+int obd_export_evict_by_uuid(struct obd_device *obd, const char *uuid)
+{
+ struct obd_export *doomed_exp = NULL;
+ struct obd_uuid doomed_uuid;
+ int exports_evicted = 0;
+
+ obd_str2uuid(&doomed_uuid, uuid);
+ if (obd_uuid_equals(&doomed_uuid, &obd->obd_uuid)) {
+ CERROR("%s: can't evict myself\n", obd->obd_name);
+ return exports_evicted;
+ }
+
+ doomed_exp = lustre_hash_lookup(obd->obd_uuid_hash, &doomed_uuid);
+
+ if (doomed_exp == NULL) {
+ CERROR("%s: can't disconnect %s: no exports found\n",
+ obd->obd_name, uuid);
+ } else {
+ CWARN("%s: evicting %s at adminstrative request\n",
+ obd->obd_name, doomed_exp->exp_client_uuid.uuid);
+ class_fail_export(doomed_exp);
+ class_export_put(doomed_exp);
+ exports_evicted++;
+ }
+
+ return exports_evicted;
+}
+EXPORT_SYMBOL(obd_export_evict_by_uuid);
+
+/**
+ * kill zombie imports and exports
+ */
+void obd_zombie_impexp_cull(void)
+{
+ struct obd_import *import;
+ struct obd_export *export;
+ ENTRY;
- if (tmp < 0 || tmp >= MAX_OBD_DEVICES) {
- CERROR("Trying to sub dev %d - dev no too large\n",
- tmp);
- GOTO(err_disconnect, rc = -EINVAL);
+ do {
+ spin_lock(&obd_zombie_impexp_lock);
+
+ import = NULL;
+ if (!list_empty(&obd_zombie_imports)) {
+ import = list_entry(obd_zombie_imports.next,
+ struct obd_import,
+ imp_zombie_chain);
+ list_del_init(&import->imp_zombie_chain);
}
- rc = obd_connect(&obddev->obd_multi_conn[count], &obd_dev[tmp]);
- if (rc) {
- CERROR("cannot connect to device %d: rc = %d\n", tmp,
- rc);
- GOTO(err_disconnect, rc);
+ export = NULL;
+ if (!list_empty(&obd_zombie_exports)) {
+ export = list_entry(obd_zombie_exports.next,
+ struct obd_export,
+ exp_obd_chain);
+ list_del_init(&export->exp_obd_chain);
}
- CDEBUG(D_INFO, "target OBD %d is of type %s\n", count,
- obd_dev[tmp].obd_type->typ_name);
+ spin_unlock(&obd_zombie_impexp_lock);
+
+ if (import != NULL)
+ class_import_destroy(import);
+
+ if (export != NULL)
+ class_export_destroy(export);
+
+ } while (import != NULL || export != NULL);
+ EXIT;
+}
+
+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 << 1
+};
+
+/**
+ * check for work for kill zombie import/export thread.
+ */
+static 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);
+}
+
+/**
+ * Add export to the obd_zombe thread and notify it.
+ */
+static void obd_zombie_export_add(struct obd_export *exp) {
+ spin_lock(&obd_zombie_impexp_lock);
+ LASSERT(list_empty(&exp->exp_obd_chain));
+ list_add(&exp->exp_obd_chain, &obd_zombie_exports);
+ spin_unlock(&obd_zombie_impexp_lock);
+
+ if (obd_zombie_impexp_notify != NULL)
+ obd_zombie_impexp_notify();
+}
+
+/**
+ * Add import to the obd_zombe thread and notify it.
+ */
+static void obd_zombie_import_add(struct obd_import *imp) {
+ LASSERT(imp->imp_sec == NULL);
+ spin_lock(&obd_zombie_impexp_lock);
+ LASSERT(list_empty(&imp->imp_zombie_chain));
+ list_add(&imp->imp_zombie_chain, &obd_zombie_imports);
+ spin_unlock(&obd_zombie_impexp_lock);
+
+ if (obd_zombie_impexp_notify != NULL)
+ obd_zombie_impexp_notify();
+}
+
+/**
+ * notify import/export destroy thread about new zombie.
+ */
+static void obd_zombie_impexp_notify(void)
+{
+ cfs_waitq_signal(&obd_zombie_waitq);
+}
+
+/**
+ * check whether obd_zombie is idle
+ */
+static int obd_zombie_is_idle(void)
+{
+ int rc;
+
+ LASSERT(!test_bit(OBD_ZOMBIE_STOP, &obd_zombie_flags));
+ spin_lock(&obd_zombie_impexp_lock);
+ rc = list_empty(&obd_zombie_imports) &&
+ list_empty(&obd_zombie_exports);
+ spin_unlock(&obd_zombie_impexp_lock);
+ return rc;
+}
- p = end + 1;
+/**
+ * wait when obd_zombie import/export queues become empty
+ */
+void obd_zombie_barrier(void)
+{
+ struct l_wait_info lwi = { 0 };
+ l_wait_event(obd_zombie_waitq, obd_zombie_is_idle(), &lwi);
+}
+EXPORT_SYMBOL(obd_zombie_barrier);
+
+#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();
+
+ /*
+ * Notify obd_zombie_barrier callers that queues
+ * may be empty.
+ */
+ cfs_waitq_signal(&obd_zombie_waitq);
}
- obddev->obd_multi_count = count;
+ complete(&obd_zombie_stop);
RETURN(0);
+}
- err_disconnect:
- for (count--; count >= 0; count--)
- obd_disconnect(&obddev->obd_multi_conn[count]);
+#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;
}
-/*
- * remove all connections to this device
- * close all connections to lower devices
- * needed for forced unloads of OBD client drivers
+#endif
+
+/**
+ * start destroy zombie import/export thread
*/
-int class_multi_cleanup(struct obd_device *obddev)
+int obd_zombie_impexp_init(void)
{
- int i;
+ int rc;
- for (i = 0; i < obddev->obd_multi_count; i++) {
- int rc;
- struct obd_device *obd =
- class_conn2obd(&obddev->obd_multi_conn[i]);
+ 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);
- if (!obd) {
- CERROR("no such device [i %d]\n", i);
- RETURN(-EINVAL);
- }
+#ifdef __KERNEL__
+ rc = cfs_kernel_thread(obd_zombie_impexp_thread, NULL, 0);
+ if (rc < 0)
+ RETURN(rc);
- rc = obd_disconnect(&obddev->obd_multi_conn[i]);
- if (rc)
- CERROR("disconnect failure %d\n", obd->obd_minor);
- }
- return 0;
+ 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