4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License version 2 for more details. A copy is
14 * included in the COPYING file that accompanied this code.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 * Copyright 2009 Sun Microsystems, Inc. All rights reserved
24 * Use is subject to license terms.
26 * Copyright (c) 2012, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/lod/lod_internal.h
34 * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
35 * Author: Mikhail Pershin <mike.pershin@intel.com>
38 #ifndef _LOD_INTERNAL_H
39 #define _LOD_INTERNAL_H
41 #include <libcfs/libcfs.h>
43 #include <dt_object.h>
45 #define LOV_USES_ASSIGNED_STRIPE 0
46 #define LOV_USES_DEFAULT_STRIPE 1
49 struct dt_device *ltd_tgt;
50 struct list_head ltd_kill;
51 struct obd_export *ltd_exp;
52 struct obd_uuid ltd_uuid;
55 struct ltd_qos ltd_qos; /* qos info per target */
56 struct obd_statfs ltd_statfs;
57 unsigned long ltd_active:1,/* is this target up for requests */
58 ltd_activate:1,/* should target be activated */
59 ltd_reap:1; /* should this target be deleted */
62 #define TGT_PTRS 256 /* number of pointers at 1st level */
63 #define TGT_PTRS_PER_BLOCK 256 /* number of pointers at 2nd level */
65 struct lod_tgt_desc_idx {
66 struct lod_tgt_desc *ldi_tgt[TGT_PTRS_PER_BLOCK];
69 #define LTD_TGT(ltd, index) \
70 ((ltd)->ltd_tgt_idx[(index) / \
71 TGT_PTRS_PER_BLOCK]->ldi_tgt[(index) % TGT_PTRS_PER_BLOCK])
73 #define OST_TGT(lod, index) LTD_TGT(&lod->lod_ost_descs, index)
74 struct lod_tgt_descs {
75 /* list of known TGTs */
76 struct lod_tgt_desc_idx *ltd_tgt_idx[TGT_PTRS];
77 /* Size of the lod_tgts array, granted to be a power of 2 */
79 /* number of registered TGTs */
81 /* bitmap of TGTs available */
82 cfs_bitmap_t *ltd_tgt_bitmap;
83 /* TGTs scheduled to be deleted */
85 /* Table refcount used for delayed deletion */
87 /* mutex to serialize concurrent updates to the tgt table */
88 struct mutex ltd_mutex;
89 /* read/write semaphore used for array relocation */
90 struct rw_semaphore ltd_rw_sem;
94 struct dt_device lod_dt_dev;
95 struct obd_export *lod_child_exp;
96 struct dt_device *lod_child;
97 cfs_proc_dir_entry_t *lod_proc_entry;
98 struct lprocfs_stats *lod_stats;
99 spinlock_t lod_connects_lock;
101 unsigned int lod_recovery_completed:1,
104 /* lov settings descriptor storing static information */
105 struct lov_desc lod_desc;
107 /* use to protect ld_active_tgt_count and all ltd_active */
108 spinlock_t lod_desc_lock;
110 /* Description of OST */
111 struct lod_tgt_descs lod_ost_descs;
112 /* Description of MDT */
113 struct lod_tgt_descs lod_mdt_descs;
115 /* maximum EA size underlied OSD may have */
116 unsigned int lod_osd_max_easize;
118 /*FIXME: When QOS and pool is implemented for MDT, probably these
119 * structure should be moved to lod_tgt_descs as well.
121 /* QoS info per LOD */
122 struct lov_qos lod_qos; /* qos info per lod */
125 struct ost_pool lod_pool_info; /* all OSTs in a packed array */
127 cfs_hash_t *lod_pools_hash_body; /* used for key access */
128 cfs_list_t lod_pool_list; /* used for sequential access */
129 cfs_proc_dir_entry_t *lod_pool_proc_entry;
131 enum lustre_sec_part lod_sp_me;
133 cfs_proc_dir_entry_t *lod_symlink;
136 #define lod_osts lod_ost_descs.ltd_tgts
137 #define lod_ost_bitmap lod_ost_descs.ltd_tgt_bitmap
138 #define lod_ostnr lod_ost_descs.ltd_tgtnr
139 #define lod_osts_size lod_ost_descs.ltd_tgts_size
140 #define ltd_ost ltd_tgt
141 #define lod_ost_desc lod_tgt_desc
144 * XXX: shrink this structure, currently it's 72bytes on 32bit arch,
145 * so, slab will be allocating 128bytes
148 struct dt_object ldo_obj;
150 /* if object is striped, then the next fields describe stripes */
152 __u16 ldo_layout_gen;
153 __u32 ldo_stripe_size;
155 struct dt_object **ldo_stripe;
156 /* to know how much memory to free, ldo_stripenr can be less */
157 int ldo_stripes_allocated;
158 /* default striping for directory represented by this object
159 * is cached in stripenr/stripe_size */
160 int ldo_striping_cached:1,
161 ldo_def_striping_set:1;
162 __u32 ldo_def_stripe_size;
163 __u16 ldo_def_stripenr;
164 __u16 ldo_def_stripe_offset;
170 struct dt_object *lit_obj; /* object from the layer below */
171 struct dt_it *lit_it; /* iterator from the layer below */
174 struct lod_thread_info {
175 /* per-thread buffer for LOV EA */
177 int lti_ea_store_size;
178 struct lu_buf lti_buf;
179 struct ost_id lti_ostid;
180 struct lu_fid lti_fid;
181 struct obd_statfs lti_osfs;
182 struct lu_attr lti_attr;
183 struct lod_it lti_it;
186 extern const struct lu_device_operations lod_lu_ops;
188 static inline int lu_device_is_lod(struct lu_device *d)
190 return ergo(d != NULL && d->ld_ops != NULL, d->ld_ops == &lod_lu_ops);
193 static inline struct lod_device* lu2lod_dev(struct lu_device *d)
195 LASSERT(lu_device_is_lod(d));
196 return container_of0(d, struct lod_device, lod_dt_dev.dd_lu_dev);
199 static inline struct lu_device *lod2lu_dev(struct lod_device *d)
201 return &d->lod_dt_dev.dd_lu_dev;
204 static inline struct obd_device *lod2obd(struct lod_device *d)
206 return d->lod_dt_dev.dd_lu_dev.ld_obd;
209 static inline struct lod_device *dt2lod_dev(struct dt_device *d)
211 LASSERT(lu_device_is_lod(&d->dd_lu_dev));
212 return container_of0(d, struct lod_device, lod_dt_dev);
215 static inline struct lod_object *lu2lod_obj(struct lu_object *o)
217 LASSERT(ergo(o != NULL, lu_device_is_lod(o->lo_dev)));
218 return container_of0(o, struct lod_object, ldo_obj.do_lu);
221 static inline struct lu_object *lod2lu_obj(struct lod_object *obj)
223 return &obj->ldo_obj.do_lu;
226 static inline struct lod_object *lod_obj(const struct lu_object *o)
228 LASSERT(lu_device_is_lod(o->lo_dev));
229 return container_of0(o, struct lod_object, ldo_obj.do_lu);
232 static inline struct lod_object *lod_dt_obj(const struct dt_object *d)
234 return lod_obj(&d->do_lu);
237 static inline struct dt_object* lod_object_child(struct lod_object *o)
239 return container_of0(lu_object_next(lod2lu_obj(o)),
240 struct dt_object, do_lu);
243 static inline struct dt_object *dt_object_child(struct dt_object *o)
245 return container_of0(lu_object_next(&(o)->do_lu),
246 struct dt_object, do_lu);
249 extern struct lu_context_key lod_thread_key;
251 static inline struct lod_thread_info *lod_env_info(const struct lu_env *env)
253 struct lod_thread_info *info;
254 info = lu_context_key_get(&env->le_ctx, &lod_thread_key);
259 #define lod_foreach_ost(__dev, index) \
260 if ((__dev)->lod_osts_size > 0) \
261 cfs_foreach_bit((__dev)->lod_ost_bitmap, (index))
264 int lod_fld_lookup(const struct lu_env *env, struct lod_device *lod,
265 const struct lu_fid *fid, mdsno_t *tgt, int flags);
267 void lod_getref(struct lod_tgt_descs *ltd);
268 void lod_putref(struct lod_device *lod, struct lod_tgt_descs *ltd);
269 int lod_add_device(const struct lu_env *env, struct lod_device *lod,
270 char *osp, unsigned index, unsigned gen, int mdt_index,
271 char *type, int active);
272 int lod_del_device(const struct lu_env *env, struct lod_device *lod,
273 struct lod_tgt_descs *ltd, char *osp, unsigned idx,
275 int lod_fini_tgt(struct lod_device *lod, struct lod_tgt_descs *ltd);
276 int lod_load_striping(const struct lu_env *env, struct lod_object *mo);
277 int lod_get_lov_ea(const struct lu_env *env, struct lod_object *mo);
278 void lod_fix_desc(struct lov_desc *desc);
279 void lod_fix_desc_qos_maxage(__u32 *val);
280 void lod_fix_desc_pattern(__u32 *val);
281 void lod_fix_desc_stripe_count(__u32 *val);
282 void lod_fix_desc_stripe_size(__u64 *val);
283 int lod_pools_init(struct lod_device *m, struct lustre_cfg *cfg);
284 int lod_pools_fini(struct lod_device *m);
285 int lod_parse_striping(const struct lu_env *env, struct lod_object *mo,
286 const struct lu_buf *buf);
287 int lod_initialize_objects(const struct lu_env *env, struct lod_object *mo,
288 struct lov_ost_data_v1 *objs);
289 int lod_store_def_striping(const struct lu_env *env, struct dt_object *dt,
291 int lod_verify_striping(struct lod_device *d, const struct lu_buf *buf, int specific);
292 int lod_generate_and_set_lovea(const struct lu_env *env,
293 struct lod_object *mo, struct thandle *th);
296 int lod_ost_pool_add(struct ost_pool *op, __u32 idx, unsigned int min_count);
297 int lod_ost_pool_remove(struct ost_pool *op, __u32 idx);
298 int lod_ost_pool_extend(struct ost_pool *op, unsigned int min_count);
299 struct pool_desc *lod_find_pool(struct lod_device *lod, char *poolname);
300 void lod_pool_putref(struct pool_desc *pool);
301 int lod_ost_pool_free(struct ost_pool *op);
302 int lod_pool_del(struct obd_device *obd, char *poolname);
303 int lod_ost_pool_init(struct ost_pool *op, unsigned int count);
304 extern cfs_hash_ops_t pool_hash_operations;
305 int lod_check_index_in_pool(__u32 idx, struct pool_desc *pool);
306 int lod_pool_new(struct obd_device *obd, char *poolname);
307 int lod_pool_add(struct obd_device *obd, char *poolname, char *ostname);
308 int lod_pool_remove(struct obd_device *obd, char *poolname, char *ostname);
311 int lod_qos_prep_create(const struct lu_env *env, struct lod_object *lo,
312 struct lu_attr *attr, const struct lu_buf *buf,
314 int qos_add_tgt(struct lod_device*, struct lod_tgt_desc *);
315 int qos_del_tgt(struct lod_device *, struct lod_tgt_desc *);
318 void lprocfs_lod_init_vars(struct lprocfs_static_vars *lvars);
319 int lod_procfs_init(struct lod_device *lod);
320 void lod_procfs_fini(struct lod_device *lod);
323 int lod_object_set_pool(struct lod_object *o, char *pool);
324 int lod_declare_striped_object(const struct lu_env *env, struct dt_object *dt,
325 struct lu_attr *attr,
326 const struct lu_buf *lovea, struct thandle *th);
327 int lod_striping_create(const struct lu_env *env, struct dt_object *dt,
328 struct lu_attr *attr, struct dt_object_format *dof,
330 void lod_object_free_striping(const struct lu_env *env, struct lod_object *lo);