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_ost;
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 OST_PTRS 256 /* number of pointers at 1st level */
63 #define OST_PTRS_PER_BLOCK 256 /* number of pointers at 2nd level */
65 struct lod_ost_desc_idx {
66 struct lod_ost_desc *ldi_ost[OST_PTRS_PER_BLOCK];
69 #define OST_TGT(dev,index) \
70 ((dev)->lod_ost_idx[(index) / \
71 OST_PTRS_PER_BLOCK]->ldi_ost[(index)%OST_PTRS_PER_BLOCK])
74 struct dt_device lod_dt_dev;
75 struct obd_export *lod_child_exp;
76 struct dt_device *lod_child;
77 cfs_proc_dir_entry_t *lod_proc_entry;
78 struct lprocfs_stats *lod_stats;
80 unsigned int lod_recovery_completed:1,
83 /* lov settings descriptor storing static information */
84 struct lov_desc lod_desc;
86 /* use to protect ld_active_tgt_count and all ltd_active */
87 spinlock_t lod_desc_lock;
89 /* list of known OSTs */
90 struct lod_ost_desc_idx *lod_ost_idx[OST_PTRS];
92 /* Size of the lod_osts array, granted to be a power of 2 */
94 /* number of registered OSTs */
96 /* OSTs scheduled to be deleted */
98 /* bitmap of OSTs available */
99 cfs_bitmap_t *lod_ost_bitmap;
101 /* maximum EA size underlied OSD may have */
102 unsigned int lod_osd_max_easize;
104 /* Table refcount used for delayed deletion */
106 /* mutex to serialize concurrent updates to the ost table */
107 struct mutex lod_mutex;
108 /* read/write semaphore used for array relocation */
109 struct rw_semaphore lod_rw_sem;
111 /* QoS info per LOD */
112 struct lov_qos lod_qos; /* qos info per lod */
115 struct ost_pool lod_pool_info; /* all OSTs in a packed array */
117 cfs_hash_t *lod_pools_hash_body; /* used for key access */
118 cfs_list_t lod_pool_list; /* used for sequential access */
119 cfs_proc_dir_entry_t *lod_pool_proc_entry;
121 enum lustre_sec_part lod_sp_me;
123 cfs_proc_dir_entry_t *lod_symlink;
127 * XXX: shrink this structure, currently it's 72bytes on 32bit arch,
128 * so, slab will be allocating 128bytes
131 struct dt_object ldo_obj;
133 /* if object is striped, then the next fields describe stripes */
135 __u16 ldo_layout_gen;
136 __u32 ldo_stripe_size;
138 struct dt_object **ldo_stripe;
139 /* to know how much memory to free, ldo_stripenr can be less */
140 int ldo_stripes_allocated;
141 /* default striping for directory represented by this object
142 * is cached in stripenr/stripe_size */
143 int ldo_striping_cached:1;
144 int ldo_def_striping_set:1;
145 __u32 ldo_def_stripe_size;
146 __u16 ldo_def_stripenr;
147 __u16 ldo_def_stripe_offset;
152 struct dt_object *lit_obj; /* object from the layer below */
153 struct dt_it *lit_it; /* iterator from the layer below */
156 struct lod_thread_info {
157 /* per-thread buffer for LOV EA */
159 int lti_ea_store_size;
160 struct lu_buf lti_buf;
161 struct ost_id lti_ostid;
162 struct lu_fid lti_fid;
163 struct obd_statfs lti_osfs;
164 struct lu_attr lti_attr;
165 struct lod_it lti_it;
168 extern const struct lu_device_operations lod_lu_ops;
170 static inline int lu_device_is_lod(struct lu_device *d)
172 return ergo(d != NULL && d->ld_ops != NULL, d->ld_ops == &lod_lu_ops);
175 static inline struct lod_device* lu2lod_dev(struct lu_device *d)
177 LASSERT(lu_device_is_lod(d));
178 return container_of0(d, struct lod_device, lod_dt_dev.dd_lu_dev);
181 static inline struct lu_device *lod2lu_dev(struct lod_device *d)
183 return &d->lod_dt_dev.dd_lu_dev;
186 static inline struct obd_device *lod2obd(struct lod_device *d)
188 return d->lod_dt_dev.dd_lu_dev.ld_obd;
191 static inline struct lod_device *dt2lod_dev(struct dt_device *d)
193 LASSERT(lu_device_is_lod(&d->dd_lu_dev));
194 return container_of0(d, struct lod_device, lod_dt_dev);
197 static inline struct lod_object *lu2lod_obj(struct lu_object *o)
199 LASSERT(ergo(o != NULL, lu_device_is_lod(o->lo_dev)));
200 return container_of0(o, struct lod_object, ldo_obj.do_lu);
203 static inline struct lu_object *lod2lu_obj(struct lod_object *obj)
205 return &obj->ldo_obj.do_lu;
208 static inline struct lod_object *lod_obj(const struct lu_object *o)
210 LASSERT(lu_device_is_lod(o->lo_dev));
211 return container_of0(o, struct lod_object, ldo_obj.do_lu);
214 static inline struct lod_object *lod_dt_obj(const struct dt_object *d)
216 return lod_obj(&d->do_lu);
219 static inline struct dt_object* lod_object_child(struct lod_object *o)
221 return container_of0(lu_object_next(lod2lu_obj(o)),
222 struct dt_object, do_lu);
225 static inline struct dt_object *lu2dt_obj(struct lu_object *o)
227 LASSERT(ergo(o != NULL, lu_device_is_dt(o->lo_dev)));
228 return container_of0(o, struct dt_object, do_lu);
231 static inline struct dt_object *dt_object_child(struct dt_object *o)
233 return container_of0(lu_object_next(&(o)->do_lu),
234 struct dt_object, do_lu);
237 extern struct lu_context_key lod_thread_key;
239 static inline struct lod_thread_info *lod_env_info(const struct lu_env *env)
241 struct lod_thread_info *info;
242 info = lu_context_key_get(&env->le_ctx, &lod_thread_key);
247 #define lod_foreach_ost(__dev, index) \
248 if ((__dev)->lod_osts_size > 0) \
249 cfs_foreach_bit((__dev)->lod_ost_bitmap, (index))
252 int lod_fld_lookup(const struct lu_env *env, struct lod_device *lod,
253 const struct lu_fid *fid, mdsno_t *tgt, int flags);
255 void lod_getref(struct lod_device *lod);
256 void lod_putref(struct lod_device *lod);
257 int lod_add_device(const struct lu_env *env, struct lod_device *m,
258 char *osp, unsigned index, unsigned gen, int active);
259 int lod_del_device(const struct lu_env *env, struct lod_device *m,
260 char *osp, unsigned index, unsigned gen);
261 int lod_load_striping(const struct lu_env *env, struct lod_object *mo);
262 int lod_get_lov_ea(const struct lu_env *env, struct lod_object *mo);
263 void lod_fix_desc(struct lov_desc *desc);
264 void lod_fix_desc_qos_maxage(__u32 *val);
265 void lod_fix_desc_pattern(__u32 *val);
266 void lod_fix_desc_stripe_count(__u32 *val);
267 void lod_fix_desc_stripe_size(__u64 *val);
268 int lod_pools_init(struct lod_device *m, struct lustre_cfg *cfg);
269 int lod_pools_fini(struct lod_device *m);
270 int lod_parse_striping(const struct lu_env *env, struct lod_object *mo,
271 const struct lu_buf *buf);
272 int lod_initialize_objects(const struct lu_env *env, struct lod_object *mo,
273 struct lov_ost_data_v1 *objs);
274 int lod_store_def_striping(const struct lu_env *env, struct dt_object *dt,
276 int lod_verify_striping(struct lod_device *d, const struct lu_buf *buf, int specific);
277 int lod_generate_and_set_lovea(const struct lu_env *env,
278 struct lod_object *mo, struct thandle *th);
281 int lod_ost_pool_add(struct ost_pool *op, __u32 idx, unsigned int min_count);
282 int lod_ost_pool_remove(struct ost_pool *op, __u32 idx);
283 int lod_ost_pool_extend(struct ost_pool *op, unsigned int min_count);
284 struct pool_desc *lod_find_pool(struct lod_device *lod, char *poolname);
285 void lod_pool_putref(struct pool_desc *pool);
286 int lod_ost_pool_free(struct ost_pool *op);
287 int lod_pool_del(struct obd_device *obd, char *poolname);
288 int lod_ost_pool_init(struct ost_pool *op, unsigned int count);
289 extern cfs_hash_ops_t pool_hash_operations;
290 int lod_check_index_in_pool(__u32 idx, struct pool_desc *pool);
291 int lod_pool_new(struct obd_device *obd, char *poolname);
292 int lod_pool_add(struct obd_device *obd, char *poolname, char *ostname);
293 int lod_pool_remove(struct obd_device *obd, char *poolname, char *ostname);
296 int lod_qos_prep_create(const struct lu_env *env, struct lod_object *lo,
297 struct lu_attr *attr, const struct lu_buf *buf,
299 int qos_add_tgt(struct lod_device*, struct lod_ost_desc *);
300 int qos_del_tgt(struct lod_device *, struct lod_ost_desc *);
303 void lprocfs_lod_init_vars(struct lprocfs_static_vars *lvars);
304 int lod_procfs_init(struct lod_device *lod);
305 void lod_procfs_fini(struct lod_device *lod);
308 int lod_object_set_pool(struct lod_object *o, char *pool);
309 int lod_declare_striped_object(const struct lu_env *env, struct dt_object *dt,
310 struct lu_attr *attr,
311 const struct lu_buf *lovea, struct thandle *th);
312 int lod_striping_create(const struct lu_env *env, struct dt_object *dt,
313 struct lu_attr *attr, struct dt_object_format *dof,
315 void lod_object_free_striping(const struct lu_env *env, struct lod_object *lo);