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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_device, cl_req for OSC layer.
*
* Author: Nikita Danilov <nikita.danilov@sun.com>
*/
#define DEBUG_SUBSYSTEM S_OSC
/* class_name2obd() */
#include "../include/obd_class.h"
#include "osc_cl_internal.h"
/** \addtogroup osc
* @{
*/
struct kmem_cache *osc_lock_kmem;
struct kmem_cache *osc_object_kmem;
struct kmem_cache *osc_thread_kmem;
struct kmem_cache *osc_session_kmem;
struct kmem_cache *osc_req_kmem;
struct kmem_cache *osc_extent_kmem;
struct kmem_cache *osc_quota_kmem;
struct lu_kmem_descr osc_caches[] = {
{
.ckd_cache = &osc_lock_kmem,
.ckd_name = "osc_lock_kmem",
.ckd_size = sizeof(struct osc_lock)
},
{
.ckd_cache = &osc_object_kmem,
.ckd_name = "osc_object_kmem",
.ckd_size = sizeof(struct osc_object)
},
{
.ckd_cache = &osc_thread_kmem,
.ckd_name = "osc_thread_kmem",
.ckd_size = sizeof(struct osc_thread_info)
},
{
.ckd_cache = &osc_session_kmem,
.ckd_name = "osc_session_kmem",
.ckd_size = sizeof(struct osc_session)
},
{
.ckd_cache = &osc_req_kmem,
.ckd_name = "osc_req_kmem",
.ckd_size = sizeof(struct osc_req)
},
{
.ckd_cache = &osc_extent_kmem,
.ckd_name = "osc_extent_kmem",
.ckd_size = sizeof(struct osc_extent)
},
{
.ckd_cache = &osc_quota_kmem,
.ckd_name = "osc_quota_kmem",
.ckd_size = sizeof(struct osc_quota_info)
},
{
.ckd_cache = NULL
}
};
struct lock_class_key osc_ast_guard_class;
/*****************************************************************************
*
* Type conversions.
*
*/
static struct lu_device *osc2lu_dev(struct osc_device *osc)
{
return &osc->od_cl.cd_lu_dev;
}
/*****************************************************************************
*
* Osc device and device type functions.
*
*/
static void *osc_key_init(const struct lu_context *ctx,
struct lu_context_key *key)
{
struct osc_thread_info *info;
info = kmem_cache_alloc(osc_thread_kmem, GFP_NOFS | __GFP_ZERO);
if (info == NULL)
info = ERR_PTR(-ENOMEM);
return info;
}
static void osc_key_fini(const struct lu_context *ctx,
struct lu_context_key *key, void *data)
{
struct osc_thread_info *info = data;
kmem_cache_free(osc_thread_kmem, info);
}
struct lu_context_key osc_key = {
.lct_tags = LCT_CL_THREAD,
.lct_init = osc_key_init,
.lct_fini = osc_key_fini
};
static void *osc_session_init(const struct lu_context *ctx,
struct lu_context_key *key)
{
struct osc_session *info;
info = kmem_cache_alloc(osc_session_kmem, GFP_NOFS | __GFP_ZERO);
if (info == NULL)
info = ERR_PTR(-ENOMEM);
return info;
}
static void osc_session_fini(const struct lu_context *ctx,
struct lu_context_key *key, void *data)
{
struct osc_session *info = data;
kmem_cache_free(osc_session_kmem, info);
}
struct lu_context_key osc_session_key = {
.lct_tags = LCT_SESSION,
.lct_init = osc_session_init,
.lct_fini = osc_session_fini
};
/* type constructor/destructor: osc_type_{init,fini,start,stop}(). */
LU_TYPE_INIT_FINI(osc, &osc_key, &osc_session_key);
static int osc_cl_process_config(const struct lu_env *env,
struct lu_device *d, struct lustre_cfg *cfg)
{
return osc_process_config_base(d->ld_obd, cfg);
}
static const struct lu_device_operations osc_lu_ops = {
.ldo_object_alloc = osc_object_alloc,
.ldo_process_config = osc_cl_process_config,
.ldo_recovery_complete = NULL
};
static const struct cl_device_operations osc_cl_ops = {
.cdo_req_init = osc_req_init
};
static int osc_device_init(const struct lu_env *env, struct lu_device *d,
const char *name, struct lu_device *next)
{
return 0;
}
static struct lu_device *osc_device_fini(const struct lu_env *env,
struct lu_device *d)
{
return NULL;
}
static struct lu_device *osc_device_free(const struct lu_env *env,
struct lu_device *d)
{
struct osc_device *od = lu2osc_dev(d);
cl_device_fini(lu2cl_dev(d));
kfree(od);
return NULL;
}
static struct lu_device *osc_device_alloc(const struct lu_env *env,
struct lu_device_type *t,
struct lustre_cfg *cfg)
{
struct lu_device *d;
struct osc_device *od;
struct obd_device *obd;
int rc;
od = kzalloc(sizeof(*od), GFP_NOFS);
if (!od)
return ERR_PTR(-ENOMEM);
cl_device_init(&od->od_cl, t);
d = osc2lu_dev(od);
d->ld_ops = &osc_lu_ops;
od->od_cl.cd_ops = &osc_cl_ops;
/* Setup OSC OBD */
obd = class_name2obd(lustre_cfg_string(cfg, 0));
LASSERT(obd != NULL);
rc = osc_setup(obd, cfg);
if (rc) {
osc_device_free(env, d);
return ERR_PTR(rc);
}
od->od_exp = obd->obd_self_export;
return d;
}
static const struct lu_device_type_operations osc_device_type_ops = {
.ldto_init = osc_type_init,
.ldto_fini = osc_type_fini,
.ldto_start = osc_type_start,
.ldto_stop = osc_type_stop,
.ldto_device_alloc = osc_device_alloc,
.ldto_device_free = osc_device_free,
.ldto_device_init = osc_device_init,
.ldto_device_fini = osc_device_fini
};
struct lu_device_type osc_device_type = {
.ldt_tags = LU_DEVICE_CL,
.ldt_name = LUSTRE_OSC_NAME,
.ldt_ops = &osc_device_type_ops,
.ldt_ctx_tags = LCT_CL_THREAD
};
/** @} osc */
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