*
* Copyright (c) 2001-2003 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.
*
* These are the only exported functions, they provide some generic
* infrastructure for managing object devices
*/
#define DEBUG_SUBSYSTEM S_CLASS
-#ifdef __KERNEL__
-#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/pagemap.h>
-#else
+#ifndef __KERNEL__
#include <liblustre.h>
-#include <linux/obd_class.h>
-#include <linux/obd.h>
#endif
-#include <linux/lprocfs_status.h>
-#include <linux/lustre_sec.h>
+#include <obd_ost.h>
+#include <obd_class.h>
+#include <lprocfs_status.h>
extern struct list_head obd_types;
-static spinlock_t obd_types_lock = SPIN_LOCK_UNLOCKED;
-kmem_cache_t *obdo_cachep = NULL;
-kmem_cache_t *import_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;
+void (*obd_zombie_impexp_notify)(void) = NULL;
+EXPORT_SYMBOL(obd_zombie_impexp_notify);
-extern kmem_cache_t *capa_cachep;
int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
-void (*ptlrpc_abort_inflight_superhack)(struct obd_import *imp);
/*
* 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(obd, obd_device_cachep, SLAB_KERNEL, sizeof(*obd));
+ 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);
+ OBD_SLAB_FREE(obd, obd_device_cachep, sizeof(*obd));
+}
+EXPORT_SYMBOL(obd_device_free);
+
+struct obd_type *class_search_type(const char *name)
{
struct list_head *tmp;
struct obd_type *type;
spin_lock(&obd_types_lock);
list_for_each(tmp, &obd_types) {
type = list_entry(tmp, struct obd_type, typ_chain);
- 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;
}
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 (strcmp(modname, LUSTRE_MDT_NAME) == 0)
+ modname = LUSTRE_MDS_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("Can't load module '%s'\n", modname);
+ }
}
#endif
- if (type)
+ if (type) {
+ spin_lock(&type->obd_type_lock);
+ type->typ_refcnt++;
try_module_get(type->typ_ops->o_owner);
+ spin_unlock(&type->obd_type_lock);
+ }
return type;
}
void class_put_type(struct obd_type *type)
{
LASSERT(type);
+ spin_lock(&type->obd_type_lock);
+ type->typ_refcnt--;
module_put(type->typ_ops->o_owner);
+ spin_unlock(&type->obd_type_lock);
}
-int class_register_type(struct obd_ops *ops, struct md_ops *md_ops,
- struct lprocfs_vars *vars, char *name)
+int class_register_type(struct obd_ops *ops, struct lprocfs_vars *vars,
+ const char *name)
{
struct obd_type *type;
int rc = 0;
OBD_ALLOC(type->typ_ops, sizeof(*type->typ_ops));
OBD_ALLOC(type->typ_name, strlen(name) + 1);
- if (md_ops)
- OBD_ALLOC(type->typ_md_ops, sizeof(*type->typ_md_ops));
- if (type->typ_ops == NULL || type->typ_name == NULL ||
- (md_ops && type->typ_md_ops == NULL))
+ if (type->typ_ops == NULL || type->typ_name == NULL)
GOTO (failed, rc);
*(type->typ_ops) = *ops;
- if (md_ops)
- *(type->typ_md_ops) = *md_ops;
- else
- type->typ_md_ops = NULL;
strcpy(type->typ_name, name);
+ spin_lock_init(&type->obd_type_lock);
#ifdef LPROCFS
type->typ_procroot = lprocfs_register(type->typ_name, proc_lustre_root,
vars, type);
-#endif
if (IS_ERR(type->typ_procroot)) {
rc = PTR_ERR(type->typ_procroot);
type->typ_procroot = NULL;
GOTO (failed, rc);
}
+#endif
spin_lock(&obd_types_lock);
list_add(&type->typ_chain, &obd_types);
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 (type->typ_md_ops, sizeof (*type->typ_md_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;
RETURN(-EBUSY);
}
- if (type->typ_procroot) {
- lprocfs_remove(type->typ_procroot);
- type->typ_procroot = NULL;
- }
+ if (type->typ_procroot)
+ lprocfs_remove(&type->typ_procroot);
spin_lock(&obd_types_lock);
list_del(&type->typ_chain);
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 (type->typ_md_ops, sizeof(*type->typ_md_ops));
OBD_FREE(type, sizeof(*type));
RETURN(0);
} /* class_unregister_type */
-struct obd_device *class_newdev(struct obd_type *type)
+struct obd_device *class_newdev(const char *type_name, const char *name)
{
struct obd_device *result = NULL;
+ 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));
+ }
spin_lock(&obd_dev_lock);
- for (i = 0 ; i < MAX_OBD_DEVICES && result == NULL; i++) {
- struct obd_device *obd = &obd_dev[i];
- if (!obd->obd_type) {
- LASSERT(obd->obd_minor == i);
- memset(obd, 0, sizeof(*obd));
+ 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';
+ obd_device_free(result);
+ }
+ result = ERR_PTR(-EEXIST);
+ break;
+ }
+ if (!result && !obd) {
+ obd = obd_device_alloc();
+ if (obd == NULL) {
+ result = ERR_PTR(-ENOMEM);
+ break;
+ }
+
+ LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC);
obd->obd_minor = i;
+ new_obd_minor = i;
obd->obd_type = type;
+ memcpy(obd->obd_name, name, strlen(name));
+
result = obd;
+ obd_devs[i] = result;
+ obd = NULL;
}
}
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))
+ 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)
{
- int minor = obd->obd_minor;
+ 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->obd_type = NULL;
- //memset(obd, 0, sizeof(*obd));
- obd->obd_minor = minor;
+ obd_devs[obd->obd_minor] = NULL;
+ obd_device_free(obd);
spin_unlock(&obd_dev_lock);
+
+ class_put_type(obd_type);
}
-int class_name2dev(char *name)
+int class_name2dev(const char *name)
{
int i;
return -1;
spin_lock(&obd_dev_lock);
- 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) {
- spin_unlock(&obd_dev_lock);
- return i;
+ 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(char *name)
+struct obd_device *class_name2obd(const char *name)
{
int dev = class_name2dev(name);
- if (dev < 0)
+
+ if (dev < 0 || dev > class_devno_max())
return NULL;
- return &obd_dev[dev];
+ return class_num2obd(dev);
}
int class_uuid2dev(struct obd_uuid *uuid)
{
int i;
+
spin_lock(&obd_dev_lock);
- for (i = 0; i < MAX_OBD_DEVICES; i++) {
- struct obd_device *obd = &obd_dev[i];
- if (obd_uuid_equals(uuid, &obd->obd_uuid)) {
+ 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 -1;
}
int dev = class_uuid2dev(uuid);
if (dev < 0)
return NULL;
- return &obd_dev[dev];
+ return class_num2obd(dev);
+}
+
+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.
- If tgt_uuid is NULL, the lov with grp_uuid is returned. */
-struct obd_device *class_find_client_obd(struct obd_uuid *tgt_uuid,
- char *typ_name,
- struct obd_uuid *grp_uuid)
+ 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;
spin_lock(&obd_dev_lock);
- for (i = 0; i < MAX_OBD_DEVICES; i++) {
- struct obd_device *obd = &obd_dev[i];
- if (obd->obd_type == NULL)
+ 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)) {
- struct client_obd *cli = &obd->u.cli;
- struct obd_import *imp = cli->cl_import;
- if (tgt_uuid == NULL) {
- LASSERT(grp_uuid);
- if (obd_uuid_equals(grp_uuid, &obd->obd_uuid)) {
- spin_unlock(&obd_dev_lock);
- return obd;
- }
- continue;
- }
- if (obd_uuid_equals(tgt_uuid, &imp->imp_target_uuid) &&
+ 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);
}
}
spin_unlock(&obd_dev_lock);
+
return NULL;
}
+struct obd_device *class_find_client_notype(struct obd_uuid *tgt_uuid,
+ struct obd_uuid *grp_uuid)
+{
+ struct obd_device *obd;
+
+ obd = class_find_client_obd(tgt_uuid, LUSTRE_MDC_NAME, NULL);
+ if (!obd)
+ obd = class_find_client_obd(tgt_uuid, LUSTRE_OSC_NAME,
+ grp_uuid);
+ return obd;
+}
+
/* 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
- it is saved in *next. If next is NULL, then the first matching device
+ 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)
+struct obd_device * class_devices_in_group(struct obd_uuid *grp_uuid, int *next)
{
int i;
- if (next == NULL)
+ if (next == NULL)
i = 0;
- else if (*next >= 0 && *next < MAX_OBD_DEVICES)
+ else if (*next >= 0 && *next < class_devno_max())
i = *next;
- else
+ else
return NULL;
- spin_lock(&obd_dev_lock);
- for (; i < MAX_OBD_DEVICES; i++) {
- struct obd_device *obd = &obd_dev[i];
- if (obd->obd_type == 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)
return obd;
}
}
-
spin_unlock(&obd_dev_lock);
+
return NULL;
}
+
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) {
- LASSERTF(kmem_cache_destroy(obdo_cachep) == 0,
- "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) {
- LASSERTF(kmem_cache_destroy(import_cachep) == 0,
- "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 (capa_cachep) {
- LASSERTF(kmem_cache_destroy(capa_cachep) == 0,
- "Cannot destory capa_cache\n");
- capa_cachep = NULL;
- }
EXIT;
}
int obd_init_caches(void)
{
ENTRY;
+
+ 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(obdo_cachep == NULL);
- obdo_cachep = kmem_cache_create("ll_obdo_cache", sizeof(struct obdo),
- 0, 0, NULL, 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",
+ import_cachep = cfs_mem_cache_create("ll_import_cache",
sizeof(struct obd_import),
- 0, 0, NULL, NULL);
+ 0, 0);
if (!import_cachep)
GOTO(out, -ENOMEM);
- LASSERT(capa_cachep == NULL);
- capa_cachep = kmem_cache_create("capa_cache",
- sizeof(struct obd_capa),
- 0, 0, NULL, NULL);
- if (!capa_cachep)
- GOTO(out, -ENOMEM);
-
RETURN(0);
out:
obd_cleanup_caches();
RETURN(NULL);
}
- CDEBUG(D_IOCTL, "looking for export cookie "LPX64"\n", conn->cookie);
+ CDEBUG(D_INFO, "looking for export cookie "LPX64"\n", conn->cookie);
export = class_handle2object(conn->cookie);
RETURN(export);
}
void __class_export_put(struct obd_export *exp)
{
if (atomic_dec_and_test(&exp->exp_refcount)) {
- struct obd_device *obd = exp->exp_obd;
- CDEBUG(D_IOCTL, "destroying export %p/%s\n", exp,
- exp->exp_client_uuid.uuid);
+ LASSERT (list_empty(&exp->exp_obd_chain));
- LASSERT(obd != NULL);
+ 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);
- /* "Local" exports (lctl, LOV->{mdc,osc}) have no connection. */
- if (exp->exp_connection)
- ptlrpc_put_connection_superhack(exp->exp_connection);
+ if (obd_zombie_impexp_notify != NULL)
+ obd_zombie_impexp_notify();
+ }
+}
+EXPORT_SYMBOL(__class_export_put);
- LASSERT(list_empty(&exp->exp_outstanding_replies));
- LASSERT(list_empty(&exp->exp_handle.h_link));
- obd_destroy_export(exp);
+void class_export_destroy(struct obd_export *exp)
+{
+ struct obd_device *obd = exp->exp_obd;
- OBD_FREE(exp, sizeof(*exp));
- if (obd->obd_set_up) {
- atomic_dec(&obd->obd_refcount);
- wake_up(&obd->obd_refcount_waitq);
- } else {
- CERROR("removing export %p from obd %s (%p) -- OBD "
- "not set up (refcount = %d)\n", exp,
- obd->obd_name, obd,
- atomic_read(&obd->obd_refcount));
- }
- }
+ LASSERT (atomic_read(&exp->exp_refcount) == 0);
+
+ CDEBUG(D_IOCTL, "destroying export %p/%s\n", exp,
+ exp->exp_client_uuid.uuid);
+
+ 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_handle.h_link));
+ obd_destroy_export(exp);
+
+ OBD_FREE(exp, sizeof(*exp));
+ class_decref(obd);
}
/* 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_export *class_new_export(struct obd_device *obd,
+ struct obd_uuid *cluuid)
{
- struct obd_export *export;
+ struct obd_export *export, *tmp;
OBD_ALLOC(export, sizeof(*export));
- if (!export) {
- CERROR("no memory! (minor %d)\n", obd->obd_minor);
- return NULL;
- }
+ if (!export)
+ return ERR_PTR(-ENOMEM);
export->exp_conn_cnt = 0;
atomic_set(&export->exp_refcount, 2);
atomic_set(&export->exp_rpc_count, 0);
export->exp_obd = obd;
- export->exp_flags = 0;
- INIT_LIST_HEAD(&export->exp_outstanding_replies);
+ CFS_INIT_LIST_HEAD(&export->exp_outstanding_replies);
/* XXX this should be in LDLM init */
- INIT_LIST_HEAD(&export->exp_ldlm_data.led_held_locks);
+ CFS_INIT_LIST_HEAD(&export->exp_ldlm_data.led_held_locks);
spin_lock_init(&export->exp_ldlm_data.led_lock);
- INIT_LIST_HEAD(&export->exp_handle.h_link);
+ CFS_INIT_LIST_HEAD(&export->exp_handle.h_link);
class_handle_hash(&export->exp_handle, export_handle_addref);
+ export->exp_last_request_time = CURRENT_SECONDS;
spin_lock_init(&export->exp_lock);
+ export->exp_client_uuid = *cluuid;
+ obd_init_export(export);
+
spin_lock(&obd->obd_dev_lock);
+ if (!obd_uuid_equals(cluuid, &obd->obd_uuid)) {
+ list_for_each_entry(tmp, &obd->obd_exports, exp_obd_chain) {
+ if (obd_uuid_equals(cluuid, &tmp->exp_client_uuid)) {
+ spin_unlock(&obd->obd_dev_lock);
+ CWARN("%s: denying duplicate export for %s\n",
+ obd->obd_name, cluuid->uuid);
+ class_handle_unhash(&export->exp_handle);
+ OBD_FREE_PTR(export);
+ return ERR_PTR(-EALREADY);
+ }
+ }
+ }
LASSERT(!obd->obd_stopping); /* shouldn't happen, but might race */
- atomic_inc(&obd->obd_refcount);
+ class_incref(obd);
list_add(&export->exp_obd_chain, &export->exp_obd->obd_exports);
+ 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);
- export->exp_connected = 1;
- obd_init_export(export);
+
return export;
}
+EXPORT_SYMBOL(class_new_export);
void class_unlink_export(struct obd_export *exp)
{
spin_lock(&exp->exp_obd->obd_dev_lock);
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);
class_export_put(exp);
}
+EXPORT_SYMBOL(class_unlink_export);
/* Import management functions */
static void import_handle_addref(void *import)
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_IOCTL, "import %p refcount=%d\n", import,
+ CDEBUG(D_INFO, "import %p refcount=%d\n", import,
atomic_read(&import->imp_refcount));
return import;
}
+EXPORT_SYMBOL(class_import_get);
void class_import_put(struct obd_import *import)
{
ENTRY;
- CDEBUG(D_IOCTL, "import %p refcount=%d\n", import,
+ CDEBUG(D_INFO, "import %p refcount=%d\n", import,
atomic_read(&import->imp_refcount) - 1);
LASSERT(atomic_read(&import->imp_refcount) > 0);
LASSERT(atomic_read(&import->imp_refcount) < 0x5a5a5a);
-
- if (!atomic_dec_and_test(&import->imp_refcount)) {
- EXIT;
- return;
+ LASSERT(list_empty(&import->imp_zombie_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);
+
+ if (obd_zombie_impexp_notify != NULL)
+ obd_zombie_impexp_notify();
}
- CDEBUG(D_IOCTL, "destroying import %p\n", import);
+ EXIT;
+}
+
+void class_import_destroy(struct obd_import *import)
+{
+ ENTRY;
- if (import->imp_connection)
- ptlrpc_put_connection_superhack(import->imp_connection);
+ CDEBUG(D_IOCTL, "destroying import %p\n", import);
+
+ LASSERT(atomic_read(&import->imp_refcount) == 0);
+
+ ptlrpc_put_connection_superhack(import->imp_connection);
- LASSERT(!import->imp_sec);
while (!list_empty(&import->imp_conn_list)) {
struct obd_import_conn *imp_conn;
imp_conn = list_entry(import->imp_conn_list.next,
struct obd_import_conn, oic_item);
list_del(&imp_conn->oic_item);
- if (imp_conn->oic_conn)
- ptlrpc_put_connection_superhack(imp_conn->oic_conn);
+ ptlrpc_put_connection_superhack(imp_conn->oic_conn);
OBD_FREE(imp_conn, sizeof(*imp_conn));
}
LASSERT(list_empty(&import->imp_handle.h_link));
+ class_decref(import->imp_obd);
OBD_FREE(import, sizeof(*import));
+
EXIT;
}
+EXPORT_SYMBOL(class_import_put);
-struct obd_import *class_new_import(void)
+struct obd_import *class_new_import(struct obd_device *obd)
{
struct obd_import *imp;
if (imp == NULL)
return NULL;
- INIT_LIST_HEAD(&imp->imp_replay_list);
- INIT_LIST_HEAD(&imp->imp_sending_list);
- INIT_LIST_HEAD(&imp->imp_delayed_list);
- INIT_LIST_HEAD(&imp->imp_rawrpc_list);
+ 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_conn_cnt = 0;
- imp->imp_max_transno = 0;
- imp->imp_peer_committed_transno = 0;
+ imp->imp_last_success_conn = 0;
imp->imp_state = LUSTRE_IMP_NEW;
- init_waitqueue_head(&imp->imp_recovery_waitq);
+ imp->imp_obd = class_incref(obd);
+ cfs_waitq_init(&imp->imp_recovery_waitq);
atomic_set(&imp->imp_refcount, 2);
atomic_set(&imp->imp_inflight, 0);
atomic_set(&imp->imp_replay_inflight, 0);
- INIT_LIST_HEAD(&imp->imp_conn_list);
- INIT_LIST_HEAD(&imp->imp_handle.h_link);
+ 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);
- imp->imp_waiting_ping_reply = 0;
+
+ /* the default magic is V1, will be used in connect RPC, and
+ * then adjusted according to the flags in request/reply. */
+ imp->imp_msg_magic = LUSTRE_MSG_MAGIC_V1;
return imp;
}
+EXPORT_SYMBOL(class_new_import);
void class_destroy_import(struct obd_import *import)
{
class_handle_unhash(&import->imp_handle);
- /* Abort any inflight DLM requests and NULL out their (about to be
- * freed) import. */
- /* Invalidate all requests on import, would be better to call
- ptlrpc_set_import_active(imp, 0); */
import->imp_generation++;
- ptlrpc_abort_inflight_superhack(import);
-
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
LASSERT(cluuid != NULL);
ENTRY;
- export = class_new_export(obd);
- if (export == NULL)
- RETURN(-ENOMEM);
+ export = class_new_export(obd, cluuid);
+ if (IS_ERR(export))
+ RETURN(PTR_ERR(export));
conn->cookie = export->exp_handle.h_cookie;
- memcpy(&export->exp_client_uuid, cluuid,
- sizeof(export->exp_client_uuid));
class_export_put(export);
CDEBUG(D_IOCTL, "connect: client %s, cookie "LPX64"\n",
cluuid->uuid, conn->cookie);
RETURN(0);
}
+EXPORT_SYMBOL(class_connect);
/* This function removes two references from the export: one for the
* hash entry and one for the export pointer passed in. The export
* pointer passed to this function is destroyed should not be used
* again. */
-int class_disconnect(struct obd_export *export, unsigned long flags)
+int class_disconnect(struct obd_export *export)
{
+ int already_disconnected;
ENTRY;
if (export == NULL) {
RETURN(-EINVAL);
}
- /* XXX this shouldn't have to be here, but double-disconnect will crash
- * otherwise, and sometimes double-disconnect happens. abort_recovery,
- * for example. */
- if (list_empty(&export->exp_handle.h_link))
+ 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)
RETURN(0);
CDEBUG(D_IOCTL, "disconnect: cookie "LPX64"\n",
export->exp_handle.h_cookie);
- if (export->exp_handle.h_cookie == LL_POISON) {
- CERROR("disconnecting freed export %p, ignoring\n", export);
- } else {
- class_unlink_export(export);
- class_export_put(export);
- }
+ class_unlink_export(export);
+ class_export_put(export);
RETURN(0);
}
-static void class_disconnect_export_list(struct list_head *list, unsigned long flags)
+static void class_disconnect_export_list(struct list_head *list, int flags)
{
- struct obd_export *fake_exp, *exp;
- struct lustre_handle fake_conn;
int rc;
+ struct lustre_handle fake_conn;
+ struct obd_export *fake_exp, *exp;
ENTRY;
- /* Move all of the exports from obd_exports to a work list, en masse. */
/* It's possible that an export may disconnect itself, but
* nothing else will be added to this list. */
- while(!list_empty(list)) {
+ while (!list_empty(list)) {
exp = list_entry(list->next, struct obd_export, exp_obd_chain);
class_export_get(exp);
+ exp->exp_flags = flags;
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.
- */
+ /* 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_put(exp);
continue;
}
-
- rc = obd_disconnect(fake_exp, flags);
+ fake_exp->exp_flags = flags;
+ rc = obd_disconnect(fake_exp);
class_export_put(exp);
if (rc) {
CDEBUG(D_HA, "disconnecting export %p failed: %d\n",
EXIT;
}
-void class_disconnect_exports(struct obd_device *obd, unsigned long flags)
+static inline int get_exp_flags_from_obd(struct obd_device *obd)
+{
+ return ((obd->obd_fail ? OBD_OPT_FAILOVER : 0) |
+ (obd->obd_force ? OBD_OPT_FORCE : 0));
+}
+
+void class_disconnect_exports(struct obd_device *obd)
{
struct list_head work_list;
ENTRY;
CDEBUG(D_HA, "OBD device %d (%p) has exports, "
"disconnecting them\n", obd->obd_minor, obd);
- class_disconnect_export_list(&work_list, flags);
+ class_disconnect_export_list(&work_list, get_exp_flags_from_obd(obd));
EXIT;
}
+EXPORT_SYMBOL(class_disconnect_exports);
/* Remove exports that have not completed recovery.
*/
-int class_disconnect_stale_exports(struct obd_device *obd,
- int (*test_export)(struct obd_export *),
- unsigned long flags)
+void class_disconnect_stale_exports(struct obd_device *obd)
{
- char str[PTL_NALFMT_SIZE];
struct list_head work_list;
struct list_head *pos, *n;
struct obd_export *exp;
int cnt = 0;
ENTRY;
- INIT_LIST_HEAD(&work_list);
+ CFS_INIT_LIST_HEAD(&work_list);
spin_lock(&obd->obd_dev_lock);
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_del(&exp->exp_obd_chain);
- list_add(&exp->exp_obd_chain, &work_list);
- cnt++;
- CDEBUG(D_ERROR, "%s: disconnect stale client %s@%s\n",
- obd->obd_name, exp->exp_client_uuid.uuid,
- exp->exp_connection == NULL ? "<unknown>" :
- ptlrpc_peernid2str(&exp->exp_connection->c_peer, str));
+ if (exp->exp_replay_needed) {
+ list_del(&exp->exp_obd_chain);
+ list_add(&exp->exp_obd_chain, &work_list);
+ cnt++;
+ }
}
spin_unlock(&obd->obd_dev_lock);
CDEBUG(D_ERROR, "%s: disconnecting %d stale clients\n",
obd->obd_name, cnt);
- class_disconnect_export_list(&work_list, flags);
- RETURN(cnt);
+ class_disconnect_export_list(&work_list, get_exp_flags_from_obd(obd));
+ EXIT;
}
-
-
+EXPORT_SYMBOL(class_disconnect_stale_exports);
int oig_init(struct obd_io_group **oig_out)
{
oig->oig_rc = 0;
oig->oig_pending = 0;
atomic_set(&oig->oig_refcount, 1);
- init_waitqueue_head(&oig->oig_waitq);
- INIT_LIST_HEAD(&oig->oig_occ_list);
+ cfs_waitq_init(&oig->oig_waitq);
+ CFS_INIT_LIST_HEAD(&oig->oig_occ_list);
*oig_out = oig;
RETURN(0);
};
+EXPORT_SYMBOL(oig_init);
static inline void oig_grab(struct obd_io_group *oig)
{
if (atomic_dec_and_test(&oig->oig_refcount))
OBD_FREE(oig, sizeof(*oig));
}
+EXPORT_SYMBOL(oig_release);
-void oig_add_one(struct obd_io_group *oig, struct oig_callback_context *occ)
+int oig_add_one(struct obd_io_group *oig, struct oig_callback_context *occ)
{
- unsigned long flags;
+ int rc = 0;
CDEBUG(D_CACHE, "oig %p ready to roll\n", oig);
- spin_lock_irqsave(&oig->oig_lock, flags);
- oig->oig_pending++;
- if (occ != NULL)
- list_add_tail(&occ->occ_oig_item, &oig->oig_occ_list);
- spin_unlock_irqrestore(&oig->oig_lock, flags);
+ spin_lock(&oig->oig_lock);
+ if (oig->oig_rc) {
+ rc = oig->oig_rc;
+ } else {
+ oig->oig_pending++;
+ if (occ != NULL)
+ list_add_tail(&occ->occ_oig_item, &oig->oig_occ_list);
+ }
+ spin_unlock(&oig->oig_lock);
oig_grab(oig);
+
+ return rc;
}
+EXPORT_SYMBOL(oig_add_one);
void oig_complete_one(struct obd_io_group *oig,
struct oig_callback_context *occ, int rc)
{
- unsigned long flags;
- wait_queue_head_t *wake = NULL;
+ cfs_waitq_t *wake = NULL;
int old_rc;
- spin_lock_irqsave(&oig->oig_lock, flags);
+ spin_lock(&oig->oig_lock);
if (occ != NULL)
list_del_init(&occ->occ_oig_item);
if (--oig->oig_pending <= 0)
wake = &oig->oig_waitq;
- spin_unlock_irqrestore(&oig->oig_lock, flags);
+ spin_unlock(&oig->oig_lock);
CDEBUG(D_CACHE, "oig %p completed, rc %d -> %d via %d, %d now "
"pending (racey)\n", oig, old_rc, oig->oig_rc, rc,
oig->oig_pending);
if (wake)
- wake_up(wake);
+ cfs_waitq_signal(wake);
oig_release(oig);
}
+EXPORT_SYMBOL(oig_complete_one);
static int oig_done(struct obd_io_group *oig)
{
- unsigned long flags;
int rc = 0;
- spin_lock_irqsave(&oig->oig_lock, flags);
+ spin_lock(&oig->oig_lock);
if (oig->oig_pending <= 0)
rc = 1;
- spin_unlock_irqrestore(&oig->oig_lock, flags);
+ spin_unlock(&oig->oig_lock);
return rc;
}
{
struct obd_io_group *oig = data;
struct oig_callback_context *occ;
- unsigned long flags;
- spin_lock_irqsave(&oig->oig_lock, flags);
+ spin_lock(&oig->oig_lock);
/* We need to restart the processing each time we drop the lock, as
* it is possible other threads called oig_complete_one() to remove
* an entry elsewhere in the list while we dropped lock. We need to
if (occ->interrupted)
continue;
occ->interrupted = 1;
- spin_unlock_irqrestore(&oig->oig_lock, flags);
+ spin_unlock(&oig->oig_lock);
occ->occ_interrupted(occ);
- spin_lock_irqsave(&oig->oig_lock, flags);
+ spin_lock(&oig->oig_lock);
goto restart;
}
- spin_unlock_irqrestore(&oig->oig_lock, flags);
+ spin_unlock(&oig->oig_lock);
}
int oig_wait(struct obd_io_group *oig)
CDEBUG(D_CACHE, "done waiting on oig %p rc %d\n", oig, oig->oig_rc);
return oig->oig_rc;
}
+EXPORT_SYMBOL(oig_wait);
+
+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);
+
+#define EVICT_BATCH 32
+int obd_export_evict_by_nid(struct obd_device *obd, char *nid)
+{
+ struct obd_export *doomed_exp[EVICT_BATCH] = { NULL };
+ struct list_head *p;
+ int exports_evicted = 0, num_to_evict = 0, i;
+
+search_again:
+ spin_lock(&obd->obd_dev_lock);
+ list_for_each(p, &obd->obd_exports) {
+ doomed_exp[num_to_evict] = list_entry(p, struct obd_export,
+ exp_obd_chain);
+ if (strcmp(obd_export_nid2str(doomed_exp[num_to_evict]),
+ nid) == 0) {
+ class_export_get(doomed_exp[num_to_evict]);
+ if (++num_to_evict == EVICT_BATCH)
+ break;
+ }
+ }
+ spin_unlock(&obd->obd_dev_lock);
+
+ for (i = 0; i < num_to_evict; i++) {
+ exports_evicted++;
+ CWARN("%s: evict NID '%s' (%s) #%d at adminstrative request\n",
+ obd->obd_name, nid, doomed_exp[i]->exp_client_uuid.uuid,
+ exports_evicted);
+ class_fail_export(doomed_exp[i]);
+ class_export_put(doomed_exp[i]);
+ }
+ if (num_to_evict == EVICT_BATCH) {
+ num_to_evict = 0;
+ goto search_again;
+ }
+
+ 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, char *uuid)
+{
+ struct obd_export *doomed_exp = NULL;
+ struct list_head *p;
+ struct obd_uuid doomed;
+ int exports_evicted = 0;
+
+ obd_str2uuid(&doomed, uuid);
+
+ spin_lock(&obd->obd_dev_lock);
+ list_for_each(p, &obd->obd_exports) {
+ doomed_exp = list_entry(p, struct obd_export, exp_obd_chain);
+
+ if (obd_uuid_equals(&doomed, &doomed_exp->exp_client_uuid)) {
+ class_export_get(doomed_exp);
+ break;
+ }
+ doomed_exp = NULL;
+ }
+ spin_unlock(&obd->obd_dev_lock);
+
+ 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);
+
+void obd_zombie_impexp_cull(void)
+{
+ struct obd_import *import;
+ struct obd_export *export;
+
+ 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(&import->imp_zombie_chain);
+ }
+
+ 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);
+ }
+
+ 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);
+}
+EXPORT_SYMBOL(obd_zombie_impexp_cull);
+
+void obd_zombie_impexp_init(void)
+{
+ INIT_LIST_HEAD(&obd_zombie_imports);
+ INIT_LIST_HEAD(&obd_zombie_exports);
+ spin_lock_init(&obd_zombie_impexp_lock);
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff