/*
* Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
+ *
+ * Copyright (c) 2012, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
{
return full_name_hash((unsigned char*)name, strlen(name));
}
-
-/* Methods for parallel directory locking */
-#if MDD_DISABLE_PDO_LOCK
-
-static void *pdo_handle = (void *)0xbabecafe;
-
-void mdd_pdlock_init(struct mdd_object *obj)
-{
-}
-
-void *mdd_pdo_write_lock(const struct lu_env *env, struct mdd_object *obj,
- const char *name, enum mdd_object_role role)
-{
- return pdo_handle;
-}
-
-void *mdd_pdo_read_lock(const struct lu_env *env, struct mdd_object *obj,
- const char *name, enum mdd_object_role role)
-{
- return pdo_handle;
-}
-
-void mdd_pdo_write_unlock(const struct lu_env *env, struct mdd_object *obj,
- void *dlh)
-{
- LASSERT(dlh == pdo_handle);
-}
-
-void mdd_pdo_read_unlock(const struct lu_env *env, struct mdd_object *obj,
- void *dlh)
-{
- LASSERT(dlh == pdo_handle);
-}
-
-#else /* !MDD_DISABLE_PDO_LOCK */
-
-#ifdef CONFIG_LOCKDEP
-static cfs_lock_class_key_t mdd_pdirop_key;
-
-#define RETIP ((unsigned long)__builtin_return_address(0))
-
-static void mdd_lockdep_init(struct mdd_object *obj)
-{
- lockdep_set_class_and_name(obj, &mdd_pdirop_key, "pdir");
-}
-
-static void mdd_lockdep_pd_acquire(struct mdd_object *obj,
- enum mdd_object_role role)
-{
-#ifdef HAVE_LOCK_MAP_ACQUIRE
- lock_map_acquire(&obj->dep_map);
-#else
- lock_acquire(&obj->dep_map, role, 0, 1, 2, RETIP);
-#endif
-}
-
-static void mdd_lockdep_pd_release(struct mdd_object *obj)
-{
-#ifdef HAVE_LOCK_MAP_ACQUIRE
- lock_map_release(&obj->dep_map);
-#else
- lock_release(&obj->dep_map, 0, RETIP);
-#endif
-}
-
-#else /* !CONFIG_LOCKDEP */
-
-static void mdd_lockdep_init(struct mdd_object *obj)
-{}
-static void mdd_lockdep_pd_acquire(struct mdd_object *obj,
- enum mdd_object_role role)
-{}
-static void mdd_lockdep_pd_release(struct mdd_object *obj)
-{}
-
-#endif /* !CONFIG_LOCKDEP */
-
-void mdd_pdlock_init(struct mdd_object *obj)
-{
- dynlock_init(&obj->mod_pdlock);
- mdd_lockdep_init(obj);
-}
-
-void *mdd_pdo_write_lock(const struct lu_env *env, struct mdd_object *obj,
- const char *name, enum mdd_object_role role)
-{
- struct dynlock_handle *handle;
- unsigned long value = mdd_name2hash(name);
-
- handle = dynlock_lock(&obj->mod_pdlock, value, DLT_WRITE, GFP_NOFS);
- if (handle != NULL)
- mdd_lockdep_pd_acquire(obj, role);
- return handle;
-}
-
-void *mdd_pdo_read_lock(const struct lu_env *env, struct mdd_object *obj,
- const char *name, enum mdd_object_role role)
-{
- struct dynlock_handle *handle;
- unsigned long value = mdd_name2hash(name);
- handle = dynlock_lock(&obj->mod_pdlock, value, DLT_READ, GFP_NOFS);
- if (handle != NULL)
- mdd_lockdep_pd_acquire(obj, role);
- return handle;
-}
-
-void mdd_pdo_write_unlock(const struct lu_env *env, struct mdd_object *obj,
- void *dlh)
-{
- mdd_lockdep_pd_release(obj);
- return dynlock_unlock(&obj->mod_pdlock, dlh);
-}
-
-void mdd_pdo_read_unlock(const struct lu_env *env, struct mdd_object *obj,
- void *dlh)
-{
- mdd_lockdep_pd_release(obj);
- return dynlock_unlock(&obj->mod_pdlock, dlh);
-}
-
-#endif /* MDD_DISABLE_PDO_LOCK */