-/* -*- 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.
/*
* Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2011, 2012, Whamcloud, Inc.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
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
}
return obd;
}
-EXPORT_SYMBOL(obd_device_alloc);
static void obd_device_free(struct obd_device *obd)
{
cfs_spin_unlock(&obd_types_lock);
return NULL;
}
+EXPORT_SYMBOL(class_search_type);
struct obd_type *class_get_type(const char *name)
{
#ifdef HAVE_MODULE_LOADING_SUPPORT
if (!type) {
const char *modname = name;
+
+ if (strcmp(modname, "obdfilter") == 0)
+ modname = "ofd";
+
if (!cfs_request_module("%s", modname)) {
CDEBUG(D_INFO, "Loaded module '%s'\n", modname);
type = class_search_type(name);
}
return type;
}
+EXPORT_SYMBOL(class_get_type);
void class_put_type(struct obd_type *type)
{
cfs_module_put(type->typ_dt_ops->o_owner);
cfs_spin_unlock(&type->obd_type_lock);
}
+EXPORT_SYMBOL(class_put_type);
#define CLASS_MAX_NAME 1024
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 */
+ lprocfs_try_remove_proc_entry(type->typ_name, proc_lustre_root);
if (type->typ_lu)
lu_device_type_fini(type->typ_lu);
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);
+ cfs_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);
+ 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);
+ cfs_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);
+ cfs_write_lock(&obd_dev_lock);
obd_devs[obd->obd_minor] = NULL;
- cfs_spin_unlock(&obd_dev_lock);
+ cfs_write_unlock(&obd_dev_lock);
obd_device_free(obd);
class_put_type(obd_type);
if (!name)
return -1;
- cfs_spin_lock(&obd_dev_lock);
+ cfs_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) {
/* 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);
+ cfs_read_unlock(&obd_dev_lock);
return i;
}
break;
}
}
- cfs_spin_unlock(&obd_dev_lock);
+ cfs_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);
+ cfs_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);
+ cfs_read_unlock(&obd_dev_lock);
return i;
}
}
- cfs_spin_unlock(&obd_dev_lock);
+ cfs_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);
void class_obd_list(void)
{
char *status;
int i;
- cfs_spin_lock(&obd_dev_lock);
+ cfs_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)
obd->obd_name, obd->obd_uuid.uuid,
cfs_atomic_read(&obd->obd_refcount));
}
- cfs_spin_unlock(&obd_dev_lock);
+ cfs_read_unlock(&obd_dev_lock);
return;
}
{
int i;
- cfs_spin_lock(&obd_dev_lock);
+ cfs_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);
+ cfs_read_unlock(&obd_dev_lock);
return obd;
}
}
}
- cfs_spin_unlock(&obd_dev_lock);
+ cfs_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);
+ cfs_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);
+ cfs_read_unlock(&obd_dev_lock);
return obd;
}
}
- cfs_spin_unlock(&obd_dev_lock);
+ cfs_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);
+ cfs_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,
+ cfs_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);
+ cfs_read_lock(&obd_dev_lock);
}
- cfs_spin_unlock(&obd_dev_lock);
+ cfs_read_unlock(&obd_dev_lock);
return rc;
}
EXPORT_SYMBOL(class_notify_sptlrpc_conf);
export = class_handle2object(conn->cookie);
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(cfs_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);
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);
if (cfs_atomic_dec_and_test(&exp->exp_refcount)) {
LASSERT(!cfs_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);
}
}
export->exp_conn_cnt = 0;
export->exp_lock_hash = NULL;
+ export->exp_flock_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_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_INIT_LIST_HEAD(&export->exp_hp_rpcs);
+ class_handle_hash(&export->exp_handle, &export_handle_ops);
+ export->exp_last_request_time = cfs_time_current_sec();
cfs_spin_lock_init(&export->exp_lock);
cfs_spin_lock_init(&export->exp_rpc_lock);
CFS_INIT_HLIST_NODE(&export->exp_uuid_hash);
CFS_INIT_HLIST_NODE(&export->exp_nid_hash);
+ cfs_spin_lock_init(&export->exp_bl_list_lock);
+ CFS_INIT_LIST_HEAD(&export->exp_bl_list);
export->exp_sp_peer = LUSTRE_SP_ANY;
export->exp_flvr.sf_rpc = SPTLRPC_FLVR_INVALID;
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);
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);
CDEBUG(D_INFO, "import %p refcount=%d obd=%s\n", import,
cfs_atomic_read(&import->imp_refcount),
{
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_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,
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);
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_mutex_init(&imp->imp_sec_mutex);
cfs_waitq_init(&imp->imp_recovery_waitq);
cfs_atomic_set(&imp->imp_refcount, 2);
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);
+ 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
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--;
+ LASSERT_ATOMIC_POS(&obd->obd_connected_clients);
+ cfs_atomic_dec(&obd->obd_connected_clients);
}
cfs_spin_unlock(&obd->obd_recovery_task_lock);
/** Cleanup req replay fields */
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);
}
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)
int (*test_export)(struct obd_export *))
{
cfs_list_t work_list;
- cfs_list_t *pos, *n;
- struct obd_export *exp;
+ 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;
-
+ cfs_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;
+ /* 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;
+
+ cfs_spin_lock(&exp->exp_lock);
+ if (test_export(exp)) {
+ cfs_spin_unlock(&exp->exp_lock);
+ continue;
+ }
+ exp->exp_failed = 1;
+ cfs_spin_unlock(&exp->exp_lock);
+
cfs_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));
cfs_spin_unlock(&obd->obd_dev_lock);
if (evicted) {
- CDEBUG(D_HA, "%s: disconnecting %d stale clients\n",
- obd->obd_name, evicted);
+ LCONSOLE_WARN("%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) |
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);
}
EXPORT_SYMBOL(obd_exports_barrier);
+/* Total amount of zombies to be destroyed */
+static int zombies_count = 0;
+
/**
* kill zombie imports and exports
*/
cfs_spin_unlock(&obd_zombie_impexp_lock);
- if (import != NULL)
+ if (import != NULL) {
class_import_destroy(import);
+ cfs_spin_lock(&obd_zombie_impexp_lock);
+ zombies_count--;
+ cfs_spin_unlock(&obd_zombie_impexp_lock);
+ }
- if (export != NULL)
+ if (export != NULL) {
class_export_destroy(export);
+ cfs_spin_lock(&obd_zombie_impexp_lock);
+ zombies_count--;
+ cfs_spin_unlock(&obd_zombie_impexp_lock);
+ }
cfs_cond_resched();
} while (import != NULL || export != NULL);
int rc;
cfs_spin_lock(&obd_zombie_impexp_lock);
- rc = cfs_list_empty(&obd_zombie_imports) &&
- cfs_list_empty(&obd_zombie_exports) &&
+ rc = (zombies_count == 0) &&
!cfs_test_bit(OBD_ZOMBIE_STOP, &obd_zombie_flags);
-
cfs_spin_unlock(&obd_zombie_impexp_lock);
RETURN(rc);
cfs_list_del_init(&exp->exp_obd_chain);
cfs_spin_unlock(&exp->exp_obd->obd_dev_lock);
cfs_spin_lock(&obd_zombie_impexp_lock);
+ zombies_count++;
cfs_list_add(&exp->exp_obd_chain, &obd_zombie_exports);
cfs_spin_unlock(&obd_zombie_impexp_lock);
- if (obd_zombie_impexp_notify != NULL)
- obd_zombie_impexp_notify();
+ obd_zombie_impexp_notify();
}
/**
*/
static void obd_zombie_import_add(struct obd_import *imp) {
LASSERT(imp->imp_sec == NULL);
+ LASSERT(imp->imp_rq_pool == NULL);
cfs_spin_lock(&obd_zombie_impexp_lock);
LASSERT(cfs_list_empty(&imp->imp_zombie_chain));
+ zombies_count++;
cfs_list_add(&imp->imp_zombie_chain, &obd_zombie_imports);
cfs_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
+ */
+ cfs_waitq_broadcast(&obd_zombie_waitq);
}
/**
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);
+ rc = (zombies_count == 0);
cfs_spin_unlock(&obd_zombie_impexp_lock);
return rc;
}
obd_zombie_pid = 0;
#ifdef __KERNEL__
- rc = cfs_kernel_thread(obd_zombie_impexp_thread, NULL, 0);
+ rc = cfs_create_thread(obd_zombie_impexp_thread, NULL, 0);
if (rc < 0)
RETURN(rc);
#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);
+
+
+
git://git.whamcloud.com / fs / lustre-release.git / blobdiff