-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
+/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
* GPL HEADER END
*/
/*
- * Copyright 2008 Sun Microsystems, Inc. All rights reserved
+ * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2013, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#ifndef __KERNEL__
#include <liblustre.h>
#endif
-#include <obd_ost.h>
#include <obd_class.h>
#include <lprocfs_status.h>
-extern cfs_list_t obd_types;
-cfs_spinlock_t obd_types_lock;
+spinlock_t obd_types_lock;
-cfs_mem_cache_t *obd_device_cachep;
-cfs_mem_cache_t *obdo_cachep;
+struct kmem_cache *obd_device_cachep;
+struct kmem_cache *obdo_cachep;
EXPORT_SYMBOL(obdo_cachep);
-cfs_mem_cache_t *import_cachep;
+struct kmem_cache *import_cachep;
-cfs_list_t obd_zombie_imports;
-cfs_list_t obd_zombie_exports;
-cfs_spinlock_t obd_zombie_impexp_lock;
+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);
const char *status, int locks);
int (*ptlrpc_put_connection_superhack)(struct ptlrpc_connection *c);
+EXPORT_SYMBOL(ptlrpc_put_connection_superhack);
/*
* support functions: we could use inter-module communication, but this
*/
static struct obd_device *obd_device_alloc(void)
{
- struct obd_device *obd;
+ 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;
+ OBD_SLAB_ALLOC_PTR_GFP(obd, obd_device_cachep, GFP_NOFS);
+ 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)
{
struct obd_type *class_search_type(const char *name)
{
- cfs_list_t *tmp;
- struct obd_type *type;
-
- cfs_spin_lock(&obd_types_lock);
- cfs_list_for_each(tmp, &obd_types) {
- type = cfs_list_entry(tmp, struct obd_type, typ_chain);
- if (strcmp(type->typ_name, name) == 0) {
- cfs_spin_unlock(&obd_types_lock);
- return type;
- }
- }
- cfs_spin_unlock(&obd_types_lock);
- return NULL;
-}
+ 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 (strcmp(type->typ_name, name) == 0) {
+ spin_unlock(&obd_types_lock);
+ return type;
+ }
+ }
+ spin_unlock(&obd_types_lock);
+ return NULL;
+}
+EXPORT_SYMBOL(class_search_type);
struct obd_type *class_get_type(const char *name)
{
struct obd_type *type = class_search_type(name);
-#ifdef CONFIG_KMOD
+#ifdef HAVE_MODULE_LOADING_SUPPORT
if (!type) {
const char *modname = name;
- if (!cfs_request_module("%s", modname)) {
- CDEBUG(D_INFO, "Loaded module '%s'\n", modname);
- type = class_search_type(name);
+
+ if (strcmp(modname, "obdfilter") == 0)
+ modname = "ofd";
+
+ if (strcmp(modname, LUSTRE_LWP_NAME) == 0)
+ modname = LUSTRE_OSP_NAME;
+
+ if (!strncmp(modname, LUSTRE_MDS_NAME, strlen(LUSTRE_MDS_NAME)))
+ modname = LUSTRE_MDT_NAME;
+
+ if (!request_module("%s", modname)) {
+ CDEBUG(D_INFO, "Loaded module '%s'\n", modname);
+ type = class_search_type(name);
} else {
LCONSOLE_ERROR_MSG(0x158, "Can't load module '%s'\n",
modname);
}
#endif
if (type) {
- cfs_spin_lock(&type->obd_type_lock);
- type->typ_refcnt++;
- cfs_try_module_get(type->typ_dt_ops->o_owner);
- cfs_spin_unlock(&type->obd_type_lock);
- }
- return 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;
}
+EXPORT_SYMBOL(class_get_type);
void class_put_type(struct obd_type *type)
{
- LASSERT(type);
- cfs_spin_lock(&type->obd_type_lock);
- type->typ_refcnt--;
- cfs_module_put(type->typ_dt_ops->o_owner);
- cfs_spin_unlock(&type->obd_type_lock);
+ LASSERT(type);
+ spin_lock(&type->obd_type_lock);
+ type->typ_refcnt--;
+ module_put(type->typ_dt_ops->o_owner);
+ spin_unlock(&type->obd_type_lock);
}
+EXPORT_SYMBOL(class_put_type);
#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)
+ bool enable_proc, struct lprocfs_seq_vars *module_vars,
+#ifndef HAVE_ONLY_PROCFS_SEQ
+ struct lprocfs_vars *vars,
+#endif
+ const char *name, struct lu_device_type *ldt)
{
struct obd_type *type;
int rc = 0;
if (md_ops)
*(type->typ_md_ops) = *md_ops;
strcpy(type->typ_name, name);
- cfs_spin_lock_init(&type->obd_type_lock);
+ 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;
- GOTO (failed, rc);
- }
+ if (enable_proc) {
+#ifndef HAVE_ONLY_PROCFS_SEQ
+ if (vars) {
+ type->typ_procroot = lprocfs_register(type->typ_name,
+ proc_lustre_root,
+ vars, type);
+ } else
+#endif
+ {
+ type->typ_procroot = lprocfs_seq_register(type->typ_name,
+ proc_lustre_root,
+ module_vars, type);
+ }
+ if (IS_ERR(type->typ_procroot)) {
+ rc = PTR_ERR(type->typ_procroot);
+ type->typ_procroot = NULL;
+ GOTO(failed, rc);
+ }
+ }
#endif
if (ldt != NULL) {
type->typ_lu = ldt;
GOTO (failed, rc);
}
- cfs_spin_lock(&obd_types_lock);
- cfs_list_add(&type->typ_chain, &obd_types);
- cfs_spin_unlock(&obd_types_lock);
+ spin_lock(&obd_types_lock);
+ list_add(&type->typ_chain, &obd_types);
+ spin_unlock(&obd_types_lock);
RETURN (0);
- failed:
- if (type->typ_name != NULL)
+failed:
+ if (type->typ_name != NULL) {
+#ifdef LPROCFS
+ if (type->typ_procroot != NULL) {
+#ifndef HAVE_ONLY_PROCFS_SEQ
+ lprocfs_try_remove_proc_entry(type->typ_name,
+ proc_lustre_root);
+#else
+ remove_proc_subtree(type->typ_name, proc_lustre_root);
+#endif
+ }
+#endif
OBD_FREE(type->typ_name, strlen(name) + 1);
+ }
if (type->typ_md_ops != NULL)
OBD_FREE_PTR(type->typ_md_ops);
if (type->typ_dt_ops != NULL)
OBD_FREE(type, sizeof(*type));
RETURN(rc);
}
+EXPORT_SYMBOL(class_register_type);
int class_unregister_type(const char *name)
{
RETURN(-EBUSY);
}
- if (type->typ_procroot) {
- lprocfs_remove(&type->typ_procroot);
- }
+ /* we do not use type->typ_procroot as for compatibility purposes
+ * other modules can share names (i.e. lod can use lov entry). so
+ * we can't reference pointer as it can get invalided when another
+ * module removes the entry */
+#ifdef LPROCFS
+ if (type->typ_procroot != NULL) {
+#ifndef HAVE_ONLY_PROCFS_SEQ
+ lprocfs_try_remove_proc_entry(type->typ_name, proc_lustre_root);
+#else
+ remove_proc_subtree(type->typ_name, proc_lustre_root);
+#endif
+ }
+ if (type->typ_procsym != NULL)
+ lprocfs_remove(&type->typ_procsym);
+#endif
if (type->typ_lu)
lu_device_type_fini(type->typ_lu);
- cfs_spin_lock(&obd_types_lock);
- cfs_list_del(&type->typ_chain);
- cfs_spin_unlock(&obd_types_lock);
+ 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_dt_ops != NULL)
OBD_FREE_PTR(type->typ_dt_ops);
OBD_FREE(type, sizeof(*type));
RETURN(0);
} /* class_unregister_type */
+EXPORT_SYMBOL(class_unregister_type);
/**
* Create a new obd device.
struct obd_type *type = NULL;
int i;
int new_obd_minor = 0;
+ ENTRY;
if (strlen(name) >= MAX_OBD_NAME) {
CERROR("name/uuid must be < %u bytes long\n", MAX_OBD_NAME);
}
newdev = obd_device_alloc();
- if (newdev == NULL) {
- class_put_type(type);
- RETURN(ERR_PTR(-ENOMEM));
- }
+ if (newdev == NULL)
+ GOTO(out_type, result = ERR_PTR(-ENOMEM));
+
LASSERT(newdev->obd_magic == OBD_DEVICE_MAGIC);
- cfs_spin_lock(&obd_dev_lock);
+ write_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 (obd && (strcmp(name, obd->obd_name) == 0)) {
+ CERROR("Device %s already exists at %d, won't add\n",
+ name, i);
if (result) {
LASSERTF(result->obd_magic == OBD_DEVICE_MAGIC,
"%p obd_magic %08x != %08x\n", result,
obd_devs[i] = result;
}
}
- cfs_spin_unlock(&obd_dev_lock);
+ write_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);
+ GOTO(out, 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;
+ if (IS_ERR(result))
+ GOTO(out, result);
+
+ CDEBUG(D_IOCTL, "Adding new device %s (%p)\n",
+ result->obd_name, result);
+
+ RETURN(result);
+out:
+ obd_device_free(newdev);
+out_type:
+ class_put_type(type);
+ return result;
}
void class_release_dev(struct obd_device *obd)
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);
+ CDEBUG(D_INFO, "Release obd device %s at %d obd_type name =%s\n",
+ obd->obd_name, obd->obd_minor, obd->obd_type->typ_name);
- cfs_spin_lock(&obd_dev_lock);
+ write_lock(&obd_dev_lock);
obd_devs[obd->obd_minor] = NULL;
- cfs_spin_unlock(&obd_dev_lock);
+ write_unlock(&obd_dev_lock);
obd_device_free(obd);
class_put_type(obd_type);
if (!name)
return -1;
- cfs_spin_lock(&obd_dev_lock);
+ read_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) {
+
+ if (obd && 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) {
- cfs_spin_unlock(&obd_dev_lock);
+ read_unlock(&obd_dev_lock);
return i;
}
break;
}
}
- cfs_spin_unlock(&obd_dev_lock);
+ read_unlock(&obd_dev_lock);
return -1;
}
+EXPORT_SYMBOL(class_name2dev);
struct obd_device *class_name2obd(const char *name)
{
return NULL;
return class_num2obd(dev);
}
+EXPORT_SYMBOL(class_name2obd);
int class_uuid2dev(struct obd_uuid *uuid)
{
int i;
- cfs_spin_lock(&obd_dev_lock);
+ read_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);
- cfs_spin_unlock(&obd_dev_lock);
+ read_unlock(&obd_dev_lock);
return i;
}
}
- cfs_spin_unlock(&obd_dev_lock);
+ read_unlock(&obd_dev_lock);
return -1;
}
+EXPORT_SYMBOL(class_uuid2dev);
struct obd_device *class_uuid2obd(struct obd_uuid *uuid)
{
return NULL;
return class_num2obd(dev);
}
+EXPORT_SYMBOL(class_uuid2obd);
/**
* Get obd device from ::obd_devs[]
return obd;
}
+EXPORT_SYMBOL(class_num2obd);
+
+/**
+ * Get obd devices count. Device in any
+ * state are counted
+ * \retval obd device count
+ */
+int get_devices_count(void)
+{
+ int index, max_index = class_devno_max(), dev_count = 0;
+
+ read_lock(&obd_dev_lock);
+ for (index = 0; index <= max_index; index++) {
+ struct obd_device *obd = class_num2obd(index);
+ if (obd != NULL)
+ dev_count++;
+ }
+ read_unlock(&obd_dev_lock);
+
+ return dev_count;
+}
+EXPORT_SYMBOL(get_devices_count);
void class_obd_list(void)
{
char *status;
int i;
- cfs_spin_lock(&obd_dev_lock);
+ read_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)
LCONSOLE(D_CONFIG, "%3d %s %s %s %s %d\n",
i, status, obd->obd_type->typ_name,
obd->obd_name, obd->obd_uuid.uuid,
- cfs_atomic_read(&obd->obd_refcount));
+ atomic_read(&obd->obd_refcount));
}
- cfs_spin_unlock(&obd_dev_lock);
+ read_unlock(&obd_dev_lock);
return;
}
{
int i;
- cfs_spin_lock(&obd_dev_lock);
+ read_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,
&obd->u.cli.cl_target_uuid) &&
((grp_uuid)? obd_uuid_equals(grp_uuid,
&obd->obd_uuid) : 1)) {
- cfs_spin_unlock(&obd_dev_lock);
+ read_unlock(&obd_dev_lock);
return obd;
}
}
}
- cfs_spin_unlock(&obd_dev_lock);
+ read_unlock(&obd_dev_lock);
return NULL;
}
+EXPORT_SYMBOL(class_find_client_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
else
return NULL;
- cfs_spin_lock(&obd_dev_lock);
+ read_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;
- cfs_spin_unlock(&obd_dev_lock);
+ read_unlock(&obd_dev_lock);
return obd;
}
}
- cfs_spin_unlock(&obd_dev_lock);
+ read_unlock(&obd_dev_lock);
return NULL;
}
+EXPORT_SYMBOL(class_devices_in_group);
/**
* to notify sptlrpc log for \a fsname has changed, let every relevant OBD
LASSERT(namelen > 0);
- cfs_spin_lock(&obd_dev_lock);
+ read_lock(&obd_dev_lock);
for (i = 0; i < class_devno_max(); i++) {
obd = class_num2obd(i);
continue;
class_incref(obd, __FUNCTION__, obd);
- cfs_spin_unlock(&obd_dev_lock);
- rc2 = obd_set_info_async(obd->obd_self_export,
+ read_unlock(&obd_dev_lock);
+ rc2 = obd_set_info_async(NULL, obd->obd_self_export,
sizeof(KEY_SPTLRPC_CONF),
KEY_SPTLRPC_CONF, 0, NULL, NULL);
rc = rc ? rc : rc2;
class_decref(obd, __FUNCTION__, obd);
- cfs_spin_lock(&obd_dev_lock);
+ read_lock(&obd_dev_lock);
}
- cfs_spin_unlock(&obd_dev_lock);
+ read_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);
+ kmem_cache_destroy(obd_device_cachep);
obd_device_cachep = NULL;
}
if (obdo_cachep) {
- rc = cfs_mem_cache_destroy(obdo_cachep);
- LASSERTF(rc == 0, "Cannot destory ll_obdo_cache\n");
+ kmem_cache_destroy(obdo_cachep);
obdo_cachep = NULL;
}
if (import_cachep) {
- rc = cfs_mem_cache_destroy(import_cachep);
- LASSERTF(rc == 0, "Cannot destory ll_import_cache\n");
+ kmem_cache_destroy(import_cachep);
import_cachep = NULL;
}
if (capa_cachep) {
- rc = cfs_mem_cache_destroy(capa_cachep);
- LASSERTF(rc == 0, "Cannot destory capa_cache\n");
+ kmem_cache_destroy(capa_cachep);
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 = cfs_mem_cache_create("ll_obdo_cache", sizeof(struct obdo),
- 0, 0);
- if (!obdo_cachep)
- GOTO(out, -ENOMEM);
-
- LASSERT(import_cachep == 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(-ENOMEM);
-
+ int rc;
+ ENTRY;
+
+ LASSERT(obd_device_cachep == NULL);
+ obd_device_cachep = kmem_cache_create("ll_obd_dev_cache",
+ sizeof(struct obd_device),
+ 0, 0, NULL);
+ if (!obd_device_cachep)
+ GOTO(out, rc = -ENOMEM);
+
+ LASSERT(obdo_cachep == NULL);
+ obdo_cachep = kmem_cache_create("ll_obdo_cache", sizeof(struct obdo),
+ 0, 0, NULL);
+ if (!obdo_cachep)
+ GOTO(out, rc = -ENOMEM);
+
+ LASSERT(import_cachep == NULL);
+ import_cachep = kmem_cache_create("ll_import_cache",
+ sizeof(struct obd_import),
+ 0, 0, NULL);
+ if (!import_cachep)
+ GOTO(out, rc = -ENOMEM);
+
+ LASSERT(capa_cachep == NULL);
+ capa_cachep = kmem_cache_create("capa_cache", sizeof(struct obd_capa),
+ 0, 0, NULL);
+ if (!capa_cachep)
+ GOTO(out, rc = -ENOMEM);
+
+ RETURN(0);
+out:
+ obd_cleanup_caches();
+ RETURN(rc);
}
/* map connection to client */
}
CDEBUG(D_INFO, "looking for export cookie "LPX64"\n", conn->cookie);
- export = class_handle2object(conn->cookie);
- RETURN(export);
+ export = class_handle2object(conn->cookie, NULL);
+ RETURN(export);
}
+EXPORT_SYMBOL(class_conn2export);
struct obd_device *class_exp2obd(struct obd_export *exp)
{
return exp->exp_obd;
return NULL;
}
+EXPORT_SYMBOL(class_exp2obd);
struct obd_device *class_conn2obd(struct lustre_handle *conn)
{
}
return NULL;
}
+EXPORT_SYMBOL(class_conn2obd);
struct obd_import *class_exp2cliimp(struct obd_export *exp)
{
return NULL;
return obd->u.cli.cl_import;
}
+EXPORT_SYMBOL(class_exp2cliimp);
struct obd_import *class_conn2cliimp(struct lustre_handle *conn)
{
return NULL;
return obd->u.cli.cl_import;
}
+EXPORT_SYMBOL(class_conn2cliimp);
/* Export management functions */
static void class_export_destroy(struct obd_export *exp)
struct obd_device *obd = exp->exp_obd;
ENTRY;
- LASSERT (cfs_atomic_read(&exp->exp_refcount) == 0);
+ LASSERT_ATOMIC_ZERO(&exp->exp_refcount);
+ LASSERT(obd != NULL);
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(cfs_list_empty(&exp->exp_outstanding_replies));
- LASSERT(cfs_list_empty(&exp->exp_uncommitted_replies));
- LASSERT(cfs_list_empty(&exp->exp_req_replay_queue));
- LASSERT(cfs_list_empty(&exp->exp_queued_rpc));
+ 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_hp_rpcs));
obd_destroy_export(exp);
class_decref(obd, "export", exp);
class_export_get(export);
}
+static struct portals_handle_ops export_handle_ops = {
+ .hop_addref = export_handle_addref,
+ .hop_free = NULL,
+};
+
struct obd_export *class_export_get(struct obd_export *exp)
{
- cfs_atomic_inc(&exp->exp_refcount);
+ atomic_inc(&exp->exp_refcount);
CDEBUG(D_INFO, "GETting export %p : new refcount %d\n", exp,
- cfs_atomic_read(&exp->exp_refcount));
+ atomic_read(&exp->exp_refcount));
return exp;
}
EXPORT_SYMBOL(class_export_get);
void class_export_put(struct obd_export *exp)
{
LASSERT(exp != NULL);
+ LASSERT_ATOMIC_GT_LT(&exp->exp_refcount, 0, LI_POISON);
CDEBUG(D_INFO, "PUTting export %p : new refcount %d\n", exp,
- cfs_atomic_read(&exp->exp_refcount) - 1);
- LASSERT(cfs_atomic_read(&exp->exp_refcount) > 0);
- LASSERT(cfs_atomic_read(&exp->exp_refcount) < 0x5a5a5a);
+ atomic_read(&exp->exp_refcount) - 1);
- if (cfs_atomic_dec_and_test(&exp->exp_refcount)) {
- LASSERT(!cfs_list_empty(&exp->exp_obd_chain));
+ if (atomic_dec_and_test(&exp->exp_refcount)) {
+ LASSERT(!list_empty(&exp->exp_obd_chain));
CDEBUG(D_IOCTL, "final put %p/%s\n",
exp, exp->exp_client_uuid.uuid);
+
+ /* release nid stat refererence */
+ lprocfs_exp_cleanup(exp);
+
obd_zombie_export_add(exp);
}
}
struct obd_uuid *cluuid)
{
struct obd_export *export;
+ cfs_hash_t *hash = NULL;
int rc = 0;
ENTRY;
export->exp_conn_cnt = 0;
export->exp_lock_hash = NULL;
- cfs_atomic_set(&export->exp_refcount, 2);
- cfs_atomic_set(&export->exp_rpc_count, 0);
- cfs_atomic_set(&export->exp_cb_count, 0);
- cfs_atomic_set(&export->exp_locks_count, 0);
+ export->exp_flock_hash = NULL;
+ atomic_set(&export->exp_refcount, 2);
+ atomic_set(&export->exp_rpc_count, 0);
+ atomic_set(&export->exp_cb_count, 0);
+ atomic_set(&export->exp_locks_count, 0);
#if LUSTRE_TRACKS_LOCK_EXP_REFS
- CFS_INIT_LIST_HEAD(&export->exp_locks_list);
- cfs_spin_lock_init(&export->exp_locks_list_guard);
+ INIT_LIST_HEAD(&export->exp_locks_list);
+ spin_lock_init(&export->exp_locks_list_guard);
#endif
- cfs_atomic_set(&export->exp_replay_count, 0);
- export->exp_obd = obd;
- CFS_INIT_LIST_HEAD(&export->exp_outstanding_replies);
- cfs_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();
- cfs_spin_lock_init(&export->exp_lock);
- CFS_INIT_HLIST_NODE(&export->exp_uuid_hash);
- CFS_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);
-
- cfs_spin_lock(&obd->obd_dev_lock);
- /* shouldn't happen, but might race */
- if (obd->obd_stopping)
- GOTO(exit_err, rc = -ENODEV);
+ atomic_set(&export->exp_replay_count, 0);
+ export->exp_obd = obd;
+ INIT_LIST_HEAD(&export->exp_outstanding_replies);
+ spin_lock_init(&export->exp_uncommitted_replies_lock);
+ INIT_LIST_HEAD(&export->exp_uncommitted_replies);
+ INIT_LIST_HEAD(&export->exp_req_replay_queue);
+ INIT_LIST_HEAD(&export->exp_handle.h_link);
+ INIT_LIST_HEAD(&export->exp_hp_rpcs);
+ INIT_LIST_HEAD(&export->exp_reg_rpcs);
+ class_handle_hash(&export->exp_handle, &export_handle_ops);
+ export->exp_last_request_time = cfs_time_current_sec();
+ spin_lock_init(&export->exp_lock);
+ spin_lock_init(&export->exp_rpc_lock);
+ INIT_HLIST_NODE(&export->exp_uuid_hash);
+ INIT_HLIST_NODE(&export->exp_nid_hash);
+ spin_lock_init(&export->exp_bl_list_lock);
+ INIT_LIST_HEAD(&export->exp_bl_list);
+
+ 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);
+ /* shouldn't happen, but might race */
+ if (obd->obd_stopping)
+ GOTO(exit_unlock, rc = -ENODEV);
+
+ hash = cfs_hash_getref(obd->obd_uuid_hash);
+ if (hash == NULL)
+ GOTO(exit_unlock, rc = -ENODEV);
+ spin_unlock(&obd->obd_dev_lock);
if (!obd_uuid_equals(cluuid, &obd->obd_uuid)) {
- rc = cfs_hash_add_unique(obd->obd_uuid_hash, cluuid,
- &export->exp_uuid_hash);
+ rc = cfs_hash_add_unique(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_lock(&obd->obd_dev_lock);
+ if (obd->obd_stopping) {
+ cfs_hash_del(hash, cluuid, &export->exp_uuid_hash);
+ GOTO(exit_unlock, rc = -ENODEV);
+ }
+
class_incref(obd, "export", export);
- cfs_list_add(&export->exp_obd_chain, &export->exp_obd->obd_exports);
- cfs_list_add_tail(&export->exp_obd_chain_timed,
- &export->exp_obd->obd_exports_timed);
+ 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++;
- cfs_spin_unlock(&obd->obd_dev_lock);
- RETURN(export);
+ spin_unlock(&obd->obd_dev_lock);
+ cfs_hash_putref(hash);
+ RETURN(export);
+exit_unlock:
+ spin_unlock(&obd->obd_dev_lock);
exit_err:
- cfs_spin_unlock(&obd->obd_dev_lock);
+ if (hash)
+ cfs_hash_putref(hash);
class_handle_unhash(&export->exp_handle);
- LASSERT(cfs_hlist_unhashed(&export->exp_uuid_hash));
+ LASSERT(hlist_unhashed(&export->exp_uuid_hash));
obd_destroy_export(export);
OBD_FREE_PTR(export);
return ERR_PTR(rc);
void class_unlink_export(struct obd_export *exp)
{
- class_handle_unhash(&exp->exp_handle);
+ class_handle_unhash(&exp->exp_handle);
- cfs_spin_lock(&exp->exp_obd->obd_dev_lock);
- /* delete an uuid-export hashitem from hashtables */
- if (!cfs_hlist_unhashed(&exp->exp_uuid_hash))
- cfs_hash_del(exp->exp_obd->obd_uuid_hash,
- &exp->exp_client_uuid,
- &exp->exp_uuid_hash);
+ spin_lock(&exp->exp_obd->obd_dev_lock);
+ /* delete an uuid-export hashitem from hashtables */
+ if (!hlist_unhashed(&exp->exp_uuid_hash))
+ cfs_hash_del(exp->exp_obd->obd_uuid_hash,
+ &exp->exp_client_uuid,
+ &exp->exp_uuid_hash);
- cfs_list_move(&exp->exp_obd_chain, &exp->exp_obd->obd_unlinked_exports);
- cfs_list_del_init(&exp->exp_obd_chain_timed);
- exp->exp_obd->obd_num_exports--;
- cfs_spin_unlock(&exp->exp_obd->obd_dev_lock);
- class_export_put(exp);
+ list_move(&exp->exp_obd_chain, &exp->exp_obd->obd_unlinked_exports);
+ 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);
CDEBUG(D_IOCTL, "destroying import %p for %s\n", imp,
imp->imp_obd->obd_name);
- LASSERT(cfs_atomic_read(&imp->imp_refcount) == 0);
+ LASSERT_ATOMIC_ZERO(&imp->imp_refcount);
ptlrpc_put_connection_superhack(imp->imp_connection);
- while (!cfs_list_empty(&imp->imp_conn_list)) {
- struct obd_import_conn *imp_conn;
+ while (!list_empty(&imp->imp_conn_list)) {
+ struct obd_import_conn *imp_conn;
- imp_conn = cfs_list_entry(imp->imp_conn_list.next,
- struct obd_import_conn, oic_item);
- cfs_list_del_init(&imp_conn->oic_item);
+ 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));
}
class_import_get(import);
}
+static struct portals_handle_ops import_handle_ops = {
+ .hop_addref = import_handle_addref,
+ .hop_free = NULL,
+};
+
struct obd_import *class_import_get(struct obd_import *import)
{
- LASSERT(cfs_atomic_read(&import->imp_refcount) >= 0);
- LASSERT(cfs_atomic_read(&import->imp_refcount) < 0x5a5a5a);
- cfs_atomic_inc(&import->imp_refcount);
+ atomic_inc(&import->imp_refcount);
CDEBUG(D_INFO, "import %p refcount=%d obd=%s\n", import,
- cfs_atomic_read(&import->imp_refcount),
+ atomic_read(&import->imp_refcount),
import->imp_obd->obd_name);
return import;
}
void class_import_put(struct obd_import *imp)
{
- ENTRY;
+ ENTRY;
- LASSERT(cfs_atomic_read(&imp->imp_refcount) > 0);
- LASSERT(cfs_atomic_read(&imp->imp_refcount) < 0x5a5a5a);
- LASSERT(cfs_list_empty(&imp->imp_zombie_chain));
+ LASSERT(list_empty(&imp->imp_zombie_chain));
+ LASSERT_ATOMIC_GT_LT(&imp->imp_refcount, 0, LI_POISON);
CDEBUG(D_INFO, "import %p refcount=%d obd=%s\n", imp,
- cfs_atomic_read(&imp->imp_refcount) - 1,
+ atomic_read(&imp->imp_refcount) - 1,
imp->imp_obd->obd_name);
- if (cfs_atomic_dec_and_test(&imp->imp_refcount)) {
+ if (atomic_dec_and_test(&imp->imp_refcount)) {
CDEBUG(D_INFO, "final put import %p\n", imp);
obd_zombie_import_add(imp);
}
- EXIT;
+ /* catch possible import put race */
+ LASSERT_ATOMIC_GE_LT(&imp->imp_refcount, 0, LI_POISON);
+ EXIT;
}
EXPORT_SYMBOL(class_import_put);
struct obd_import *class_new_import(struct obd_device *obd)
{
- struct obd_import *imp;
-
- OBD_ALLOC(imp, sizeof(*imp));
- if (imp == NULL)
- return NULL;
-
- 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);
- cfs_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);
- cfs_sema_init(&imp->imp_sec_mutex, 1);
- cfs_waitq_init(&imp->imp_recovery_waitq);
-
- cfs_atomic_set(&imp->imp_refcount, 2);
- cfs_atomic_set(&imp->imp_unregistering, 0);
- cfs_atomic_set(&imp->imp_inflight, 0);
- cfs_atomic_set(&imp->imp_replay_inflight, 0);
- cfs_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;
+ struct obd_import *imp;
+
+ OBD_ALLOC(imp, sizeof(*imp));
+ if (imp == NULL)
+ return NULL;
+
+ INIT_LIST_HEAD(&imp->imp_pinger_chain);
+ INIT_LIST_HEAD(&imp->imp_zombie_chain);
+ 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_committed_list);
+ imp->imp_replay_cursor = &imp->imp_committed_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);
+ mutex_init(&imp->imp_sec_mutex);
+ init_waitqueue_head(&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);
+ INIT_LIST_HEAD(&imp->imp_conn_list);
+ INIT_LIST_HEAD(&imp->imp_handle.h_link);
+ class_handle_hash(&imp->imp_handle, &import_handle_ops);
+ 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);
void class_destroy_import(struct obd_import *import)
{
- LASSERT(import != NULL);
- LASSERT(import != LP_POISON);
+ LASSERT(import != NULL);
+ LASSERT(import != LP_POISON);
- class_handle_unhash(&import->imp_handle);
+ class_handle_unhash(&import->imp_handle);
- cfs_spin_lock(&import->imp_lock);
- import->imp_generation++;
- cfs_spin_unlock(&import->imp_lock);
- class_import_put(import);
+ spin_lock(&import->imp_lock);
+ import->imp_generation++;
+ spin_unlock(&import->imp_lock);
+ class_import_put(import);
}
EXPORT_SYMBOL(class_destroy_import);
void __class_export_add_lock_ref(struct obd_export *exp, struct ldlm_lock *lock)
{
- cfs_spin_lock(&exp->exp_locks_list_guard);
+ spin_lock(&exp->exp_locks_list_guard);
LASSERT(lock->l_exp_refs_nr >= 0);
exp, lock, lock->l_exp_refs_target);
}
if ((lock->l_exp_refs_nr ++) == 0) {
- cfs_list_add(&lock->l_exp_refs_link, &exp->exp_locks_list);
+ list_add(&lock->l_exp_refs_link, &exp->exp_locks_list);
lock->l_exp_refs_target = exp;
}
CDEBUG(D_INFO, "lock = %p, export = %p, refs = %u\n",
lock, exp, lock->l_exp_refs_nr);
- cfs_spin_unlock(&exp->exp_locks_list_guard);
+ spin_unlock(&exp->exp_locks_list_guard);
}
EXPORT_SYMBOL(__class_export_add_lock_ref);
void __class_export_del_lock_ref(struct obd_export *exp, struct ldlm_lock *lock)
{
- cfs_spin_lock(&exp->exp_locks_list_guard);
+ spin_lock(&exp->exp_locks_list_guard);
LASSERT(lock->l_exp_refs_nr > 0);
if (lock->l_exp_refs_target != exp) {
LCONSOLE_WARN("lock %p, "
lock, lock->l_exp_refs_target, exp);
}
if (-- lock->l_exp_refs_nr == 0) {
- cfs_list_del_init(&lock->l_exp_refs_link);
+ list_del_init(&lock->l_exp_refs_link);
lock->l_exp_refs_target = NULL;
}
CDEBUG(D_INFO, "lock = %p, export = %p, refs = %u\n",
lock, exp, lock->l_exp_refs_nr);
- cfs_spin_unlock(&exp->exp_locks_list_guard);
+ spin_unlock(&exp->exp_locks_list_guard);
}
EXPORT_SYMBOL(__class_export_del_lock_ref);
#endif
/* 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;
-
- cfs_spin_lock_bh(&obd->obd_processing_task_lock);
- if (exp->exp_delayed)
- obd->obd_delayed_clients--;
- if (obd->obd_recovering && exp->exp_in_recovery) {
- cfs_spin_lock(&exp->exp_lock);
- exp->exp_in_recovery = 0;
- cfs_spin_unlock(&exp->exp_lock);
- LASSERT(obd->obd_connected_clients);
- obd->obd_connected_clients--;
- }
- /** Cleanup req replay fields */
- if (exp->exp_req_replay_needed) {
- cfs_spin_lock(&exp->exp_lock);
- exp->exp_req_replay_needed = 0;
- cfs_spin_unlock(&exp->exp_lock);
- LASSERT(cfs_atomic_read(&obd->obd_req_replay_clients));
- cfs_atomic_dec(&obd->obd_req_replay_clients);
- }
- /** Cleanup lock replay data */
- if (exp->exp_lock_replay_needed) {
- cfs_spin_lock(&exp->exp_lock);
- exp->exp_lock_replay_needed = 0;
- cfs_spin_unlock(&exp->exp_lock);
- LASSERT(cfs_atomic_read(&obd->obd_lock_replay_clients));
- cfs_atomic_dec(&obd->obd_lock_replay_clients);
- }
- cfs_spin_unlock_bh(&obd->obd_processing_task_lock);
+ struct obd_device *obd = exp->exp_obd;
+
+ spin_lock(&obd->obd_recovery_task_lock);
+ if (obd->obd_recovering) {
+ if (exp->exp_in_recovery) {
+ spin_lock(&exp->exp_lock);
+ exp->exp_in_recovery = 0;
+ spin_unlock(&exp->exp_lock);
+ LASSERT_ATOMIC_POS(&obd->obd_connected_clients);
+ atomic_dec(&obd->obd_connected_clients);
+ }
+
+ /* if called during recovery then should update
+ * obd_stale_clients counter,
+ * lightweight exports are not counted */
+ if ((exp_connect_flags(exp) & OBD_CONNECT_LIGHTWEIGHT) == 0)
+ exp->exp_obd->obd_stale_clients++;
+ }
+ spin_unlock(&obd->obd_recovery_task_lock);
+
+ spin_lock(&exp->exp_lock);
+ /** Cleanup req replay fields */
+ if (exp->exp_req_replay_needed) {
+ exp->exp_req_replay_needed = 0;
+
+ LASSERT(atomic_read(&obd->obd_req_replay_clients));
+ atomic_dec(&obd->obd_req_replay_clients);
+ }
+
+ /** Cleanup lock replay data */
+ if (exp->exp_lock_replay_needed) {
+ exp->exp_lock_replay_needed = 0;
+
+ LASSERT(atomic_read(&obd->obd_lock_replay_clients));
+ atomic_dec(&obd->obd_lock_replay_clients);
+ }
+ spin_unlock(&exp->exp_lock);
}
/* This function removes 1-3 references from the export:
ENTRY;
if (export == NULL) {
- fixme();
- CDEBUG(D_IOCTL, "attempting to free NULL export %p\n", export);
+ CWARN("attempting to free NULL export %p\n", export);
RETURN(-EINVAL);
}
- cfs_spin_lock(&export->exp_lock);
- already_disconnected = export->exp_disconnected;
- export->exp_disconnected = 1;
- cfs_spin_unlock(&export->exp_lock);
+ 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(cfs_hlist_unhashed(&export->exp_nid_hash));
+ LASSERT(hlist_unhashed(&export->exp_nid_hash));
GOTO(no_disconn, already_disconnected);
}
CDEBUG(D_IOCTL, "disconnect: cookie "LPX64"\n",
export->exp_handle.h_cookie);
- if (!cfs_hlist_unhashed(&export->exp_nid_hash))
+ if (!hlist_unhashed(&export->exp_nid_hash))
cfs_hash_del(export->exp_obd->obd_nid_hash,
&export->exp_connection->c_peer.nid,
&export->exp_nid_hash);
class_export_put(export);
RETURN(0);
}
+EXPORT_SYMBOL(class_disconnect);
/* Return non-zero for a fully connected export */
int class_connected_export(struct obd_export *exp)
{
- if (exp) {
- int connected;
- cfs_spin_lock(&exp->exp_lock);
- connected = (exp->exp_conn_cnt > 0);
- cfs_spin_unlock(&exp->exp_lock);
- return connected;
- }
- return 0;
+ int connected = 0;
+
+ if (exp) {
+ spin_lock(&exp->exp_lock);
+ connected = (exp->exp_conn_cnt > 0) && !exp->exp_failed;
+ spin_unlock(&exp->exp_lock);
+ }
+ return connected;
}
EXPORT_SYMBOL(class_connected_export);
-static void class_disconnect_export_list(cfs_list_t *list,
+static void class_disconnect_export_list(struct list_head *list,
enum obd_option flags)
{
int rc;
/* It's possible that an export may disconnect itself, but
* nothing else will be added to this list. */
- while (!cfs_list_empty(list)) {
- exp = cfs_list_entry(list->next, struct obd_export,
- exp_obd_chain);
- /* need for safe call CDEBUG after obd_disconnect */
- class_export_get(exp);
+ 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);
- cfs_spin_lock(&exp->exp_lock);
- exp->exp_flags = flags;
- cfs_spin_unlock(&exp->exp_lock);
+ 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)) {
exp);
/* Need to delete this now so we don't end up pointing
* to work_list later when this export is cleaned up. */
- cfs_list_del_init(&exp->exp_obd_chain);
+ list_del_init(&exp->exp_obd_chain);
class_export_put(exp);
continue;
}
void class_disconnect_exports(struct obd_device *obd)
{
- cfs_list_t work_list;
- ENTRY;
+ 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);
- cfs_spin_lock(&obd->obd_dev_lock);
- cfs_list_splice_init(&obd->obd_exports, &work_list);
- cfs_list_splice_init(&obd->obd_delayed_exports, &work_list);
- cfs_spin_unlock(&obd->obd_dev_lock);
+ /* Move all of the exports from obd_exports to a work list, en masse. */
+ 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 (!cfs_list_empty(&work_list)) {
+ 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,
void class_disconnect_stale_exports(struct obd_device *obd,
int (*test_export)(struct obd_export *))
{
- cfs_list_t work_list;
- cfs_list_t *pos, *n;
- struct obd_export *exp;
+ struct list_head work_list;
+ struct obd_export *exp, *n;
int evicted = 0;
ENTRY;
- CFS_INIT_LIST_HEAD(&work_list);
- cfs_spin_lock(&obd->obd_dev_lock);
- cfs_list_for_each_safe(pos, n, &obd->obd_exports) {
- exp = cfs_list_entry(pos, struct obd_export, exp_obd_chain);
- if (test_export(exp))
- continue;
-
+ INIT_LIST_HEAD(&work_list);
+ spin_lock(&obd->obd_dev_lock);
+ list_for_each_entry_safe(exp, n, &obd->obd_exports,
+ exp_obd_chain) {
/* don't count self-export as client */
if (obd_uuid_equals(&exp->exp_client_uuid,
&exp->exp_obd->obd_uuid))
continue;
- cfs_list_move(&exp->exp_obd_chain, &work_list);
+ /* don't evict clients which have no slot in last_rcvd
+ * (e.g. lightweight connection) */
+ if (exp->exp_target_data.ted_lr_idx == -1)
+ continue;
+
+ spin_lock(&exp->exp_lock);
+ if (exp->exp_failed || test_export(exp)) {
+ spin_unlock(&exp->exp_lock);
+ continue;
+ }
+ exp->exp_failed = 1;
+ spin_unlock(&exp->exp_lock);
+
+ list_move(&exp->exp_obd_chain, &work_list);
evicted++;
- CDEBUG(D_ERROR, "%s: disconnect stale client %s@%s\n",
+ CDEBUG(D_HA, "%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));
print_export_data(exp, "EVICTING", 0);
}
- cfs_spin_unlock(&obd->obd_dev_lock);
+ spin_unlock(&obd->obd_dev_lock);
- if (evicted) {
- CDEBUG(D_HA, "%s: disconnecting %d stale clients\n",
- obd->obd_name, evicted);
- obd->obd_stale_clients += evicted;
- }
- class_disconnect_export_list(&work_list, exp_flags_from_obd(obd) |
- OBD_OPT_ABORT_RECOV);
- EXIT;
+ if (evicted)
+ LCONSOLE_WARN("%s: disconnecting %d stale clients\n",
+ obd->obd_name, evicted);
+
+ class_disconnect_export_list(&work_list, exp_flags_from_obd(obd) |
+ OBD_OPT_ABORT_RECOV);
+ EXIT;
}
EXPORT_SYMBOL(class_disconnect_stale_exports);
void class_fail_export(struct obd_export *exp)
{
- int rc, already_failed;
+ int rc, already_failed;
- cfs_spin_lock(&exp->exp_lock);
- already_failed = exp->exp_failed;
- exp->exp_failed = 1;
- cfs_spin_unlock(&exp->exp_lock);
+ 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",
if (obd_dump_on_timeout)
libcfs_debug_dumplog();
+ /* need for safe call CDEBUG after obd_disconnect */
+ class_export_get(exp);
+
/* 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. */
else
CDEBUG(D_HA, "disconnected export %p/%s\n",
exp, exp->exp_client_uuid.uuid);
+ class_export_put(exp);
}
EXPORT_SYMBOL(class_fail_export);
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 = cfs_hash_lookup(obd->obd_nid_hash, &nid_key);
+ cfs_hash_t *nid_hash;
+ struct obd_export *doomed_exp = NULL;
+ int exports_evicted = 0;
+
+ lnet_nid_t nid_key = libcfs_str2nid((char *)nid);
+
+ spin_lock(&obd->obd_dev_lock);
+ /* umount has run already, so evict thread should leave
+ * its task to umount thread now */
+ if (obd->obd_stopping) {
+ spin_unlock(&obd->obd_dev_lock);
+ return exports_evicted;
+ }
+ nid_hash = obd->obd_nid_hash;
+ cfs_hash_getref(nid_hash);
+ spin_unlock(&obd->obd_dev_lock);
+
+ do {
+ doomed_exp = cfs_hash_lookup(nid_hash, &nid_key);
if (doomed_exp == NULL)
break;
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);
+ LCONSOLE_WARN("%s: evicting %s (at %s) by administrative "
+ "request\n", obd->obd_name,
+ obd_uuid2str(&doomed_exp->exp_client_uuid),
+ obd_export_nid2str(doomed_exp));
class_fail_export(doomed_exp);
class_export_put(doomed_exp);
} while (1);
+ cfs_hash_putref(nid_hash);
+
if (!exports_evicted)
CDEBUG(D_HA,"%s: can't disconnect NID '%s': no exports found\n",
obd->obd_name, 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;
+ cfs_hash_t *uuid_hash;
+ struct obd_export *doomed_exp = NULL;
+ struct obd_uuid doomed_uuid;
+ int exports_evicted = 0;
+
+ spin_lock(&obd->obd_dev_lock);
+ if (obd->obd_stopping) {
+ spin_unlock(&obd->obd_dev_lock);
+ return exports_evicted;
+ }
+ uuid_hash = obd->obd_uuid_hash;
+ cfs_hash_getref(uuid_hash);
+ spin_unlock(&obd->obd_dev_lock);
obd_str2uuid(&doomed_uuid, uuid);
if (obd_uuid_equals(&doomed_uuid, &obd->obd_uuid)) {
CERROR("%s: can't evict myself\n", obd->obd_name);
+ cfs_hash_putref(uuid_hash);
return exports_evicted;
}
- doomed_exp = cfs_hash_lookup(obd->obd_uuid_hash, &doomed_uuid);
+ doomed_exp = cfs_hash_lookup(uuid_hash, &doomed_uuid);
if (doomed_exp == NULL) {
CERROR("%s: can't disconnect %s: no exports found\n",
class_export_put(doomed_exp);
exports_evicted++;
}
+ cfs_hash_putref(uuid_hash);
return exports_evicted;
}
#endif
static void print_export_data(struct obd_export *exp, const char *status,
- int locks)
-{
- struct ptlrpc_reply_state *rs;
- struct ptlrpc_reply_state *first_reply = NULL;
- int nreplies = 0;
-
- cfs_spin_lock(&exp->exp_lock);
- cfs_list_for_each_entry(rs, &exp->exp_outstanding_replies,
- rs_exp_list) {
- if (nreplies == 0)
- first_reply = rs;
- nreplies++;
- }
- cfs_spin_unlock(&exp->exp_lock);
+ int locks)
+{
+ struct ptlrpc_reply_state *rs;
+ struct ptlrpc_reply_state *first_reply = NULL;
+ int nreplies = 0;
+
+ spin_lock(&exp->exp_lock);
+ list_for_each_entry(rs, &exp->exp_outstanding_replies,
+ rs_exp_list) {
+ if (nreplies == 0)
+ first_reply = rs;
+ nreplies++;
+ }
+ spin_unlock(&exp->exp_lock);
CDEBUG(D_HA, "%s: %s %p %s %s %d (%d %d %d) %d %d %d %d: %p %s "LPU64"\n",
exp->exp_obd->obd_name, status, exp, exp->exp_client_uuid.uuid,
- obd_export_nid2str(exp), cfs_atomic_read(&exp->exp_refcount),
- cfs_atomic_read(&exp->exp_rpc_count),
- cfs_atomic_read(&exp->exp_cb_count),
- cfs_atomic_read(&exp->exp_locks_count),
+ obd_export_nid2str(exp), atomic_read(&exp->exp_refcount),
+ atomic_read(&exp->exp_rpc_count),
+ atomic_read(&exp->exp_cb_count),
+ atomic_read(&exp->exp_locks_count),
exp->exp_disconnected, exp->exp_delayed, exp->exp_failed,
nreplies, first_reply, nreplies > 3 ? "..." : "",
exp->exp_last_committed);
{
struct obd_export *exp;
- cfs_spin_lock(&obd->obd_dev_lock);
- cfs_list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain)
- print_export_data(exp, "ACTIVE", locks);
- cfs_list_for_each_entry(exp, &obd->obd_unlinked_exports, exp_obd_chain)
- print_export_data(exp, "UNLINKED", locks);
- cfs_list_for_each_entry(exp, &obd->obd_delayed_exports, exp_obd_chain)
- print_export_data(exp, "DELAYED", locks);
- cfs_spin_unlock(&obd->obd_dev_lock);
- cfs_spin_lock(&obd_zombie_impexp_lock);
- cfs_list_for_each_entry(exp, &obd_zombie_exports, exp_obd_chain)
- print_export_data(exp, "ZOMBIE", locks);
- cfs_spin_unlock(&obd_zombie_impexp_lock);
+ spin_lock(&obd->obd_dev_lock);
+ list_for_each_entry(exp, &obd->obd_exports, exp_obd_chain)
+ print_export_data(exp, "ACTIVE", locks);
+ list_for_each_entry(exp, &obd->obd_unlinked_exports, exp_obd_chain)
+ print_export_data(exp, "UNLINKED", locks);
+ list_for_each_entry(exp, &obd->obd_delayed_exports, exp_obd_chain)
+ print_export_data(exp, "DELAYED", locks);
+ spin_unlock(&obd->obd_dev_lock);
+ spin_lock(&obd_zombie_impexp_lock);
+ list_for_each_entry(exp, &obd_zombie_exports, exp_obd_chain)
+ print_export_data(exp, "ZOMBIE", locks);
+ spin_unlock(&obd_zombie_impexp_lock);
}
EXPORT_SYMBOL(dump_exports);
void obd_exports_barrier(struct obd_device *obd)
{
- int waited = 2;
- LASSERT(cfs_list_empty(&obd->obd_exports));
- cfs_spin_lock(&obd->obd_dev_lock);
- while (!cfs_list_empty(&obd->obd_unlinked_exports)) {
- cfs_spin_unlock(&obd->obd_dev_lock);
- cfs_schedule_timeout_and_set_state(CFS_TASK_UNINT,
- cfs_time_seconds(waited));
- if (waited > 5 && IS_PO2(waited)) {
- LCONSOLE_WARN("%s is waiting for obd_unlinked_exports "
- "more than %d seconds. "
- "The obd refcount = %d. Is it stuck?\n",
- obd->obd_name, waited,
- cfs_atomic_read(&obd->obd_refcount));
- dump_exports(obd, 0);
- }
- waited *= 2;
- cfs_spin_lock(&obd->obd_dev_lock);
- }
- cfs_spin_unlock(&obd->obd_dev_lock);
+ int waited = 2;
+ LASSERT(list_empty(&obd->obd_exports));
+ spin_lock(&obd->obd_dev_lock);
+ while (!list_empty(&obd->obd_unlinked_exports)) {
+ spin_unlock(&obd->obd_dev_lock);
+ schedule_timeout_and_set_state(TASK_UNINTERRUPTIBLE,
+ cfs_time_seconds(waited));
+ if (waited > 5 && IS_PO2(waited)) {
+ LCONSOLE_WARN("%s is waiting for obd_unlinked_exports "
+ "more than %d seconds. "
+ "The obd refcount = %d. Is it stuck?\n",
+ obd->obd_name, waited,
+ atomic_read(&obd->obd_refcount));
+ dump_exports(obd, 1);
+ }
+ waited *= 2;
+ spin_lock(&obd->obd_dev_lock);
+ }
+ spin_unlock(&obd->obd_dev_lock);
}
EXPORT_SYMBOL(obd_exports_barrier);
+/* Total amount of zombies to be destroyed */
+static int zombies_count = 0;
+
/**
* kill zombie imports and exports
*/
void obd_zombie_impexp_cull(void)
{
- struct obd_import *import;
- struct obd_export *export;
- ENTRY;
-
- do {
- cfs_spin_lock(&obd_zombie_impexp_lock);
-
- import = NULL;
- if (!cfs_list_empty(&obd_zombie_imports)) {
- import = cfs_list_entry(obd_zombie_imports.next,
- struct obd_import,
- imp_zombie_chain);
- cfs_list_del_init(&import->imp_zombie_chain);
- }
-
- export = NULL;
- if (!cfs_list_empty(&obd_zombie_exports)) {
- export = cfs_list_entry(obd_zombie_exports.next,
- struct obd_export,
- exp_obd_chain);
- cfs_list_del_init(&export->exp_obd_chain);
- }
-
- cfs_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 cfs_completion_t obd_zombie_start;
-static cfs_completion_t obd_zombie_stop;
-static unsigned long obd_zombie_flags;
-static cfs_waitq_t obd_zombie_waitq;
-static pid_t obd_zombie_pid;
+ struct obd_import *import;
+ struct obd_export *export;
+ ENTRY;
+
+ 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);
+ }
+
+ 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);
+ spin_lock(&obd_zombie_impexp_lock);
+ zombies_count--;
+ spin_unlock(&obd_zombie_impexp_lock);
+ }
+
+ if (export != NULL) {
+ class_export_destroy(export);
+ spin_lock(&obd_zombie_impexp_lock);
+ zombies_count--;
+ spin_unlock(&obd_zombie_impexp_lock);
+ }
+
+ cond_resched();
+ } 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 wait_queue_head_t obd_zombie_waitq;
+static pid_t obd_zombie_pid;
enum {
- OBD_ZOMBIE_STOP = 1 << 1
+ OBD_ZOMBIE_STOP = 0x0001,
};
/**
*/
static int obd_zombie_impexp_check(void *arg)
{
- int rc;
-
- cfs_spin_lock(&obd_zombie_impexp_lock);
- rc = cfs_list_empty(&obd_zombie_imports) &&
- cfs_list_empty(&obd_zombie_exports) &&
- !cfs_test_bit(OBD_ZOMBIE_STOP, &obd_zombie_flags);
+ int rc;
- cfs_spin_unlock(&obd_zombie_impexp_lock);
+ spin_lock(&obd_zombie_impexp_lock);
+ rc = (zombies_count == 0) &&
+ !test_bit(OBD_ZOMBIE_STOP, &obd_zombie_flags);
+ spin_unlock(&obd_zombie_impexp_lock);
- RETURN(rc);
+ RETURN(rc);
}
/**
* Add export to the obd_zombe thread and notify it.
*/
static void obd_zombie_export_add(struct obd_export *exp) {
- cfs_spin_lock(&exp->exp_obd->obd_dev_lock);
- LASSERT(!cfs_list_empty(&exp->exp_obd_chain));
- cfs_list_del_init(&exp->exp_obd_chain);
- cfs_spin_unlock(&exp->exp_obd->obd_dev_lock);
- cfs_spin_lock(&obd_zombie_impexp_lock);
- cfs_list_add(&exp->exp_obd_chain, &obd_zombie_exports);
- cfs_spin_unlock(&obd_zombie_impexp_lock);
+ spin_lock(&exp->exp_obd->obd_dev_lock);
+ LASSERT(!list_empty(&exp->exp_obd_chain));
+ list_del_init(&exp->exp_obd_chain);
+ spin_unlock(&exp->exp_obd->obd_dev_lock);
+ spin_lock(&obd_zombie_impexp_lock);
+ zombies_count++;
+ 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();
+ 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);
- cfs_spin_lock(&obd_zombie_impexp_lock);
- LASSERT(cfs_list_empty(&imp->imp_zombie_chain));
- cfs_list_add(&imp->imp_zombie_chain, &obd_zombie_imports);
- cfs_spin_unlock(&obd_zombie_impexp_lock);
+ LASSERT(imp->imp_sec == NULL);
+ LASSERT(imp->imp_rq_pool == NULL);
+ spin_lock(&obd_zombie_impexp_lock);
+ LASSERT(list_empty(&imp->imp_zombie_chain));
+ zombies_count++;
+ 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();
+ obd_zombie_impexp_notify();
}
/**
*/
static void obd_zombie_impexp_notify(void)
{
- cfs_waitq_signal(&obd_zombie_waitq);
+ /*
+ * Make sure obd_zomebie_impexp_thread get this notification.
+ * It is possible this signal only get by obd_zombie_barrier, and
+ * barrier gulps this notification and sleeps away and hangs ensues
+ */
+ wake_up_all(&obd_zombie_waitq);
}
/**
*/
static int obd_zombie_is_idle(void)
{
- int rc;
+ int rc;
- LASSERT(!cfs_test_bit(OBD_ZOMBIE_STOP, &obd_zombie_flags));
- cfs_spin_lock(&obd_zombie_impexp_lock);
- rc = cfs_list_empty(&obd_zombie_imports) &&
- cfs_list_empty(&obd_zombie_exports);
- cfs_spin_unlock(&obd_zombie_impexp_lock);
- return rc;
+ LASSERT(!test_bit(OBD_ZOMBIE_STOP, &obd_zombie_flags));
+ spin_lock(&obd_zombie_impexp_lock);
+ rc = (zombies_count == 0);
+ spin_unlock(&obd_zombie_impexp_lock);
+ return rc;
}
/**
*/
void obd_zombie_barrier(void)
{
- struct l_wait_info lwi = { 0 };
+ struct l_wait_info lwi = { 0 };
- if (obd_zombie_pid == cfs_curproc_pid())
- /* don't wait for myself */
- return;
- l_wait_event(obd_zombie_waitq, obd_zombie_is_idle(), &lwi);
+ if (obd_zombie_pid == current_pid())
+ /* don't wait for myself */
+ return;
+ l_wait_event(obd_zombie_waitq, obd_zombie_is_idle(), &lwi);
}
EXPORT_SYMBOL(obd_zombie_barrier);
*/
static int obd_zombie_impexp_thread(void *unused)
{
- int rc;
-
- if ((rc = cfs_daemonize_ctxt("obd_zombid"))) {
- cfs_complete(&obd_zombie_start);
- RETURN(rc);
- }
-
- cfs_complete(&obd_zombie_start);
+ unshare_fs_struct();
+ complete(&obd_zombie_start);
- obd_zombie_pid = cfs_curproc_pid();
+ obd_zombie_pid = current_pid();
- while(!cfs_test_bit(OBD_ZOMBIE_STOP, &obd_zombie_flags)) {
- struct l_wait_info lwi = { 0 };
+ 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();
+ 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);
- }
+ /*
+ * Notify obd_zombie_barrier callers that queues
+ * may be empty.
+ */
+ wake_up(&obd_zombie_waitq);
+ }
- cfs_complete(&obd_zombie_stop);
+ complete(&obd_zombie_stop);
- RETURN(0);
+ RETURN(0);
}
#else /* ! KERNEL */
-static cfs_atomic_t zombie_recur = CFS_ATOMIC_INIT(0);
+static atomic_t zombie_recur = ATOMIC_INIT(0);
static void *obd_zombie_impexp_work_cb;
static void *obd_zombie_impexp_idle_cb;
{
int rc = 0;
- if (cfs_atomic_inc_return(&zombie_recur) == 1) {
+ if (atomic_inc_return(&zombie_recur) == 1) {
obd_zombie_impexp_cull();
rc = 1;
}
- cfs_atomic_dec(&zombie_recur);
+ atomic_dec(&zombie_recur);
return rc;
}
*/
int obd_zombie_impexp_init(void)
{
- int rc;
+#ifdef __KERNEL__
+ struct task_struct *task;
+#endif
+
+ INIT_LIST_HEAD(&obd_zombie_imports);
- CFS_INIT_LIST_HEAD(&obd_zombie_imports);
- CFS_INIT_LIST_HEAD(&obd_zombie_exports);
- cfs_spin_lock_init(&obd_zombie_impexp_lock);
- cfs_init_completion(&obd_zombie_start);
- cfs_init_completion(&obd_zombie_stop);
- cfs_waitq_init(&obd_zombie_waitq);
- obd_zombie_pid = 0;
+ INIT_LIST_HEAD(&obd_zombie_exports);
+ spin_lock_init(&obd_zombie_impexp_lock);
+ init_completion(&obd_zombie_start);
+ init_completion(&obd_zombie_stop);
+ init_waitqueue_head(&obd_zombie_waitq);
+ obd_zombie_pid = 0;
#ifdef __KERNEL__
- rc = cfs_kernel_thread(obd_zombie_impexp_thread, NULL, 0);
- if (rc < 0)
- RETURN(rc);
+ task = kthread_run(obd_zombie_impexp_thread, NULL, "obd_zombid");
+ if (IS_ERR(task))
+ RETURN(PTR_ERR(task));
- cfs_wait_for_completion(&obd_zombie_start);
+ wait_for_completion(&obd_zombie_start);
#else
obd_zombie_impexp_work_cb =
obd_zombie_impexp_idle_cb =
liblustre_register_idle_callback("obd_zombi_impexp_check",
&obd_zombie_impexp_check, NULL);
- rc = 0;
#endif
- RETURN(rc);
+ RETURN(0);
}
/**
* stop destroy zombie import/export thread
*/
void obd_zombie_impexp_stop(void)
{
- cfs_set_bit(OBD_ZOMBIE_STOP, &obd_zombie_flags);
+ set_bit(OBD_ZOMBIE_STOP, &obd_zombie_flags);
obd_zombie_impexp_notify();
#ifdef __KERNEL__
- cfs_wait_for_completion(&obd_zombie_stop);
+ 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
}
+/***** Kernel-userspace comm helpers *******/
+
+/* Get length of entire message, including header */
+int kuc_len(int payload_len)
+{
+ return sizeof(struct kuc_hdr) + payload_len;
+}
+EXPORT_SYMBOL(kuc_len);
+
+/* Get a pointer to kuc header, given a ptr to the payload
+ * @param p Pointer to payload area
+ * @returns Pointer to kuc header
+ */
+struct kuc_hdr * kuc_ptr(void *p)
+{
+ struct kuc_hdr *lh = ((struct kuc_hdr *)p) - 1;
+ LASSERT(lh->kuc_magic == KUC_MAGIC);
+ return lh;
+}
+EXPORT_SYMBOL(kuc_ptr);
+
+/* Test if payload is part of kuc message
+ * @param p Pointer to payload area
+ * @returns boolean
+ */
+int kuc_ispayload(void *p)
+{
+ struct kuc_hdr *kh = ((struct kuc_hdr *)p) - 1;
+
+ if (kh->kuc_magic == KUC_MAGIC)
+ return 1;
+ else
+ return 0;
+}
+EXPORT_SYMBOL(kuc_ispayload);
+
+/* Alloc space for a message, and fill in header
+ * @return Pointer to payload area
+ */
+void *kuc_alloc(int payload_len, int transport, int type)
+{
+ struct kuc_hdr *lh;
+ int len = kuc_len(payload_len);
+
+ OBD_ALLOC(lh, len);
+ if (lh == NULL)
+ return ERR_PTR(-ENOMEM);
+
+ lh->kuc_magic = KUC_MAGIC;
+ lh->kuc_transport = transport;
+ lh->kuc_msgtype = type;
+ lh->kuc_msglen = len;
+
+ return (void *)(lh + 1);
+}
+EXPORT_SYMBOL(kuc_alloc);
+
+/* Takes pointer to payload area */
+inline void kuc_free(void *p, int payload_len)
+{
+ struct kuc_hdr *lh = kuc_ptr(p);
+ OBD_FREE(lh, kuc_len(payload_len));
+}
+EXPORT_SYMBOL(kuc_free);
+
+struct obd_request_slot_waiter {
+ struct list_head orsw_entry;
+ wait_queue_head_t orsw_waitq;
+ bool orsw_signaled;
+};
+
+static bool obd_request_slot_avail(struct client_obd *cli,
+ struct obd_request_slot_waiter *orsw)
+{
+ bool avail;
+
+ client_obd_list_lock(&cli->cl_loi_list_lock);
+ avail = !!list_empty(&orsw->orsw_entry);
+ client_obd_list_unlock(&cli->cl_loi_list_lock);
+
+ return avail;
+};
+
+/*
+ * For network flow control, the RPC sponsor needs to acquire a credit
+ * before sending the RPC. The credits count for a connection is defined
+ * by the "cl_max_rpcs_in_flight". If all the credits are occpuied, then
+ * the subsequent RPC sponsors need to wait until others released their
+ * credits, or the administrator increased the "cl_max_rpcs_in_flight".
+ */
+int obd_get_request_slot(struct client_obd *cli)
+{
+ struct obd_request_slot_waiter orsw;
+ struct l_wait_info lwi;
+ int rc;
+
+ client_obd_list_lock(&cli->cl_loi_list_lock);
+ if (cli->cl_r_in_flight < cli->cl_max_rpcs_in_flight) {
+ cli->cl_r_in_flight++;
+ client_obd_list_unlock(&cli->cl_loi_list_lock);
+ return 0;
+ }
+
+ init_waitqueue_head(&orsw.orsw_waitq);
+ list_add_tail(&orsw.orsw_entry, &cli->cl_loi_read_list);
+ orsw.orsw_signaled = false;
+ client_obd_list_unlock(&cli->cl_loi_list_lock);
+
+ lwi = LWI_INTR(LWI_ON_SIGNAL_NOOP, NULL);
+ rc = l_wait_event(orsw.orsw_waitq,
+ obd_request_slot_avail(cli, &orsw) ||
+ orsw.orsw_signaled,
+ &lwi);
+
+ /* Here, we must take the lock to avoid the on-stack 'orsw' to be
+ * freed but other (such as obd_put_request_slot) is using it. */
+ client_obd_list_lock(&cli->cl_loi_list_lock);
+ if (rc != 0) {
+ if (!orsw.orsw_signaled) {
+ if (list_empty(&orsw.orsw_entry))
+ cli->cl_r_in_flight--;
+ else
+ list_del(&orsw.orsw_entry);
+ }
+ }
+
+ if (orsw.orsw_signaled) {
+ LASSERT(list_empty(&orsw.orsw_entry));
+
+ rc = -EINTR;
+ }
+ client_obd_list_unlock(&cli->cl_loi_list_lock);
+
+ return rc;
+}
+EXPORT_SYMBOL(obd_get_request_slot);
+
+void obd_put_request_slot(struct client_obd *cli)
+{
+ struct obd_request_slot_waiter *orsw;
+
+ client_obd_list_lock(&cli->cl_loi_list_lock);
+ cli->cl_r_in_flight--;
+
+ /* If there is free slot, wakeup the first waiter. */
+ if (!list_empty(&cli->cl_loi_read_list) &&
+ likely(cli->cl_r_in_flight < cli->cl_max_rpcs_in_flight)) {
+ orsw = list_entry(cli->cl_loi_read_list.next,
+ struct obd_request_slot_waiter, orsw_entry);
+ list_del_init(&orsw->orsw_entry);
+ cli->cl_r_in_flight++;
+ wake_up(&orsw->orsw_waitq);
+ }
+ client_obd_list_unlock(&cli->cl_loi_list_lock);
+}
+EXPORT_SYMBOL(obd_put_request_slot);
+
+__u32 obd_get_max_rpcs_in_flight(struct client_obd *cli)
+{
+ return cli->cl_max_rpcs_in_flight;
+}
+EXPORT_SYMBOL(obd_get_max_rpcs_in_flight);
+
+int obd_set_max_rpcs_in_flight(struct client_obd *cli, __u32 max)
+{
+ struct obd_request_slot_waiter *orsw;
+ __u32 old;
+ int diff;
+ int i;
+
+ if (max > OBD_MAX_RIF_MAX || max < 1)
+ return -ERANGE;
+
+ client_obd_list_lock(&cli->cl_loi_list_lock);
+ old = cli->cl_max_rpcs_in_flight;
+ cli->cl_max_rpcs_in_flight = max;
+ diff = max - old;
+
+ /* We increase the max_rpcs_in_flight, then wakeup some waiters. */
+ for (i = 0; i < diff; i++) {
+ if (list_empty(&cli->cl_loi_read_list))
+ break;
+
+ orsw = list_entry(cli->cl_loi_read_list.next,
+ struct obd_request_slot_waiter, orsw_entry);
+ list_del_init(&orsw->orsw_entry);
+ cli->cl_r_in_flight++;
+ wake_up(&orsw->orsw_waitq);
+ }
+ client_obd_list_unlock(&cli->cl_loi_list_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL(obd_set_max_rpcs_in_flight);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff