diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/obdclass/local_storage.h')
-rw-r--r-- | drivers/staging/lustre/lustre/obdclass/local_storage.h | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/obdclass/local_storage.h b/drivers/staging/lustre/lustre/obdclass/local_storage.h new file mode 100644 index 000000000000..d553c3752703 --- /dev/null +++ b/drivers/staging/lustre/lustre/obdclass/local_storage.h @@ -0,0 +1,88 @@ +/* + * 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> + */ + +#include <dt_object.h> +#include <obd.h> +#include <lustre_fid.h> +#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 |