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* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is included
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
* GPL HEADER END
*/
/*
* Copyright (c) 2008, 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/
* Lustre is a trademark of Sun Microsystems, Inc.
*
* Implementation of cl_object for LOVSUB layer.
*
* Author: Nikita Danilov <nikita.danilov@sun.com>
*/
#define DEBUG_SUBSYSTEM S_LOV
#include "lov_cl_internal.h"
/** \addtogroup lov
* @{
*/
/*****************************************************************************
*
* Lovsub object operations.
*
*/
int lovsub_object_init(const struct lu_env *env, struct lu_object *obj,
const struct lu_object_conf *conf)
{
struct lovsub_device *dev = lu2lovsub_dev(obj->lo_dev);
struct lu_object *below;
struct lu_device *under;
int result;
under = &dev->acid_next->cd_lu_dev;
below = under->ld_ops->ldo_object_alloc(env, obj->lo_header, under);
if (below != NULL) {
lu_object_add(obj, below);
cl_object_page_init(lu2cl(obj), sizeof(struct lovsub_page));
result = 0;
} else
result = -ENOMEM;
return result;
}
static void lovsub_object_free(const struct lu_env *env, struct lu_object *obj)
{
struct lovsub_object *los = lu2lovsub(obj);
struct lov_object *lov = los->lso_super;
/* We can't assume lov was assigned here, because of the shadow
* object handling in lu_object_find.
*/
if (lov) {
LASSERT(lov->lo_type == LLT_RAID0);
LASSERT(lov->u.raid0.lo_sub[los->lso_index] == los);
spin_lock(&lov->u.raid0.lo_sub_lock);
lov->u.raid0.lo_sub[los->lso_index] = NULL;
spin_unlock(&lov->u.raid0.lo_sub_lock);
}
lu_object_fini(obj);
lu_object_header_fini(&los->lso_header.coh_lu);
kmem_cache_free(lovsub_object_kmem, los);
}
static int lovsub_object_print(const struct lu_env *env, void *cookie,
lu_printer_t p, const struct lu_object *obj)
{
struct lovsub_object *los = lu2lovsub(obj);
return (*p)(env, cookie, "[%d]", los->lso_index);
}
static int lovsub_attr_set(const struct lu_env *env, struct cl_object *obj,
const struct cl_attr *attr, unsigned valid)
{
struct lov_object *lov = cl2lovsub(obj)->lso_super;
lov_r0(lov)->lo_attr_valid = 0;
return 0;
}
static int lovsub_object_glimpse(const struct lu_env *env,
const struct cl_object *obj,
struct ost_lvb *lvb)
{
struct lovsub_object *los = cl2lovsub(obj);
return cl_object_glimpse(env, &los->lso_super->lo_cl, lvb);
}
static const struct cl_object_operations lovsub_ops = {
.coo_page_init = lovsub_page_init,
.coo_lock_init = lovsub_lock_init,
.coo_attr_set = lovsub_attr_set,
.coo_glimpse = lovsub_object_glimpse
};
static const struct lu_object_operations lovsub_lu_obj_ops = {
.loo_object_init = lovsub_object_init,
.loo_object_delete = NULL,
.loo_object_release = NULL,
.loo_object_free = lovsub_object_free,
.loo_object_print = lovsub_object_print,
.loo_object_invariant = NULL
};
struct lu_object *lovsub_object_alloc(const struct lu_env *env,
const struct lu_object_header *unused,
struct lu_device *dev)
{
struct lovsub_object *los;
struct lu_object *obj;
los = kmem_cache_alloc(lovsub_object_kmem, GFP_NOFS | __GFP_ZERO);
if (los != NULL) {
struct cl_object_header *hdr;
obj = lovsub2lu(los);
hdr = &los->lso_header;
cl_object_header_init(hdr);
lu_object_init(obj, &hdr->coh_lu, dev);
lu_object_add_top(&hdr->coh_lu, obj);
los->lso_cl.co_ops = &lovsub_ops;
obj->lo_ops = &lovsub_lu_obj_ops;
} else
obj = NULL;
return obj;
}
/** @} lov */
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