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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 COPYING file that accompanied this code.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* GPL HEADER END
*/
/*
* Copyright (c) 2012, Intel Corporation.
*/
/*
* lustre/obdclass/local_storage.c
*
* Local storage for file/objects with fid generation. Works on top of OSD.
*
* Author: Mikhail Pershin <mike.pershin@intel.com>
*/
#ifndef __LOCAL_STORAGE_H
#define __LOCAL_STORAGE_H
#include "../include/dt_object.h"
#include "../include/obd.h"
#include "../include/lustre_fid.h"
#include "../include/lustre_disk.h"
struct ls_device {
struct dt_device ls_top_dev;
/* all initialized ls_devices on this node linked by this */
struct list_head ls_linkage;
/* how many handle's reference this local storage */
atomic_t ls_refcount;
/* underlaying OSD device */
struct dt_device *ls_osd;
/* list of all local OID storages */
struct list_head ls_los_list;
struct mutex ls_los_mutex;
};
static inline struct ls_device *dt2ls_dev(struct dt_device *d)
{
return container_of0(d, struct ls_device, ls_top_dev);
}
struct ls_object {
struct lu_object_header ls_header;
struct dt_object ls_obj;
};
static inline struct ls_object *lu2ls_obj(struct lu_object *o)
{
return container_of0(o, struct ls_object, ls_obj.do_lu);
}
static inline struct dt_object *ls_locate(const struct lu_env *env,
struct ls_device *ls,
const struct lu_fid *fid)
{
return dt_locate_at(env, ls->ls_osd, fid, &ls->ls_top_dev.dd_lu_dev);
}
struct ls_device *ls_device_get(struct dt_device *dev);
void ls_device_put(const struct lu_env *env, struct ls_device *ls);
struct local_oid_storage *dt_los_find(struct ls_device *ls, __u64 seq);
void dt_los_put(struct local_oid_storage *los);
/* Lustre 2.3 on-disk structure describing local object OIDs storage
* the structure to be used with any sequence managed by
* local object library.
* Obsoleted since 2.4 but is kept for compatibility reasons,
* see lastid_compat_check() in obdclass/local_storage.c */
struct los_ondisk {
__u32 lso_magic;
__u32 lso_next_oid;
};
#define LOS_MAGIC 0xdecafbee
#endif
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