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27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/osp/osp_internal.h
38 * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
41 #ifndef _OSP_INTERNAL_H
42 #define _OSP_INTERNAL_H
45 #include <obd_class.h>
46 #include <dt_object.h>
47 #include <lustre_fid.h>
50 * Infrastructure to support tracking of last committed llog record
52 struct osp_id_tracker {
53 cfs_spinlock_t otr_lock;
55 __u32 otr_committed_id;
56 /* callback is register once per diskfs -- that's the whole point */
57 struct dt_txn_callback otr_tx_cb;
58 /* single node can run many clusters */
59 cfs_list_t otr_wakeup_list;
61 /* underlying shared device */
62 struct dt_device *otr_dev;
63 /* how many users of this tracker */
64 cfs_atomic_t otr_refcount;
68 struct dt_device opd_dt_dev;
69 /* corresponded OST index */
71 /* device used to store persistent state (llogs, last ids) */
72 struct obd_export *opd_storage_exp;
73 struct dt_device *opd_storage;
74 struct dt_object *opd_last_used_file;
76 /* stored persistently in LE format, updated directly to/from disk
77 * and required le64_to_cpu() conversion before use.
78 * Protected by opd_pre_lock */
79 volatile obd_id opd_last_used_id;
83 /* connection to OST */
84 struct obd_device *opd_obd;
85 struct obd_export *opd_exp;
86 struct obd_uuid opd_cluuid;
87 struct obd_connect_data *opd_connect_data;
89 cfs_proc_dir_entry_t *opd_proc_entry;
90 struct lprocfs_stats *opd_stats;
91 /* connection status. */
92 int opd_new_connection;
93 int opd_got_disconnected;
94 int opd_imp_connected;
96 int opd_imp_seen_connected:1;
98 /* whether local recovery is completed:
99 * reported via ->ldo_recovery_complete() */
100 int opd_recovery_completed;
105 cfs_spinlock_t opd_pre_lock;
106 /* last id assigned in creation */
107 __u64 opd_pre_used_id;
108 /* last created id OST reported, next-created - available id's */
109 __u64 opd_pre_last_created;
110 /* how many ids are reserved in declare, we shouldn't block in create */
111 __u64 opd_pre_reserved;
112 /* dedicate precreate thread */
113 struct ptlrpc_thread opd_pre_thread;
114 /* thread waits for signals about pool going empty */
115 cfs_waitq_t opd_pre_waitq;
116 /* consumers (who needs new ids) wait here */
117 cfs_waitq_t opd_pre_user_waitq;
118 /* current precreation status: working, failed, stopping? */
120 /* how many to precreate next time */
121 int opd_pre_grow_count;
122 int opd_pre_min_grow_count;
123 int opd_pre_max_grow_count;
124 /* whether to grow precreation window next time or not */
125 int opd_pre_grow_slow;
128 * OST synchronization
130 cfs_spinlock_t opd_syn_lock;
131 /* unique generation, to recognize start of new records in the llog */
132 struct llog_gen opd_syn_generation;
133 /* number of changes to sync, used to wake up sync thread */
134 unsigned long opd_syn_changes;
135 /* processing of changes from previous mount is done? */
136 int opd_syn_prev_done;
138 struct ptlrpc_thread opd_syn_thread;
139 cfs_waitq_t opd_syn_waitq;
140 /* list of remotely committed rpc */
141 cfs_list_t opd_syn_committed_there;
142 /* number of changes being under sync */
143 int opd_syn_sync_in_progress;
144 /* number of RPCs in flight - flow control */
145 int opd_syn_rpc_in_flight;
146 int opd_syn_max_rpc_in_flight;
147 /* number of RPC in processing (including non-committed by OST) */
148 int opd_syn_rpc_in_progress;
149 int opd_syn_max_rpc_in_progress;
150 /* osd api's commit cb control structure */
151 struct dt_txn_callback opd_syn_txn_cb;
152 /* last used change number -- semantically similar to transno */
153 unsigned long opd_syn_last_used_id;
154 /* last committed change number -- semantically similar to
156 unsigned long opd_syn_last_committed_id;
157 /* last processed (taken from llog) id */
158 unsigned long opd_syn_last_processed_id;
159 struct osp_id_tracker *opd_syn_tracker;
160 cfs_list_t opd_syn_ontrack;
163 * statfs related fields: OSP maintains it on its own
165 struct obd_statfs opd_statfs;
166 cfs_time_t opd_statfs_fresh_till;
167 cfs_timer_t opd_statfs_timer;
168 int opd_statfs_update_in_progress;
169 /* how often to update statfs data */
170 int opd_statfs_maxage;
172 cfs_proc_dir_entry_t *opd_symlink;
175 extern cfs_mem_cache_t *osp_object_kmem;
177 /* this is a top object */
179 struct lu_object_header opo_header;
180 struct dt_object opo_obj;
185 extern struct lu_object_operations osp_lu_obj_ops;
186 extern const struct dt_device_operations osp_dt_ops;
188 struct osp_thread_info {
189 struct lu_buf osi_lb;
190 struct lu_fid osi_fid;
191 struct lu_attr osi_attr;
192 struct ost_id osi_oi;
196 struct llog_rec_hdr osi_hdr;
197 struct llog_unlink64_rec osi_unlink;
198 struct llog_setattr64_rec osi_setattr;
199 struct llog_gen_rec osi_gen;
201 struct llog_cookie osi_cookie;
202 struct llog_catid osi_cid;
205 static inline void osp_objid_buf_prep(struct osp_thread_info *osi,
206 struct osp_device *d, int index)
208 osi->osi_lb.lb_buf = (void *)&d->opd_last_used_id;
209 osi->osi_lb.lb_len = sizeof(d->opd_last_used_id);
210 osi->osi_off = sizeof(d->opd_last_used_id) * index;
213 extern struct lu_context_key osp_thread_key;
215 static inline struct osp_thread_info *osp_env_info(const struct lu_env *env)
217 struct osp_thread_info *info;
219 info = lu_context_key_get(&env->le_ctx, &osp_thread_key);
221 lu_env_refill((struct lu_env *)env);
222 info = lu_context_key_get(&env->le_ctx, &osp_thread_key);
228 struct osp_txn_info {
229 __u32 oti_current_id;
232 extern struct lu_context_key osp_txn_key;
234 static inline struct osp_txn_info *osp_txn_info(struct lu_context *ctx)
236 struct osp_txn_info *info;
238 info = lu_context_key_get(ctx, &osp_txn_key);
242 extern const struct lu_device_operations osp_lu_ops;
244 static inline int lu_device_is_osp(struct lu_device *d)
246 return ergo(d != NULL && d->ld_ops != NULL, d->ld_ops == &osp_lu_ops);
249 static inline struct osp_device *lu2osp_dev(struct lu_device *d)
251 LASSERT(lu_device_is_osp(d));
252 return container_of0(d, struct osp_device, opd_dt_dev.dd_lu_dev);
255 static inline struct lu_device *osp2lu_dev(struct osp_device *d)
257 return &d->opd_dt_dev.dd_lu_dev;
260 static inline struct osp_device *dt2osp_dev(struct dt_device *d)
262 LASSERT(lu_device_is_osp(&d->dd_lu_dev));
263 return container_of0(d, struct osp_device, opd_dt_dev);
266 static inline struct osp_object *lu2osp_obj(struct lu_object *o)
268 LASSERT(ergo(o != NULL, lu_device_is_osp(o->lo_dev)));
269 return container_of0(o, struct osp_object, opo_obj.do_lu);
272 static inline struct lu_object *osp2lu_obj(struct osp_object *obj)
274 return &obj->opo_obj.do_lu;
277 static inline struct osp_object *osp_obj(const struct lu_object *o)
279 LASSERT(lu_device_is_osp(o->lo_dev));
280 return container_of0(o, struct osp_object, opo_obj.do_lu);
283 static inline struct osp_object *dt2osp_obj(const struct dt_object *d)
285 return osp_obj(&d->do_lu);
288 static inline struct dt_object *osp_object_child(struct osp_object *o)
290 return container_of0(lu_object_next(osp2lu_obj(o)),
291 struct dt_object, do_lu);
295 void osp_update_last_id(struct osp_device *d, obd_id objid);
297 /* osp_precreate.c */
298 int osp_init_precreate(struct osp_device *d);
299 int osp_precreate_reserve(const struct lu_env *env, struct osp_device *d);
300 __u64 osp_precreate_get_id(struct osp_device *d);
301 void osp_precreate_fini(struct osp_device *d);
302 int osp_object_truncate(const struct lu_env *env, struct dt_object *dt, __u64);
303 void osp_pre_update_status(struct osp_device *d, int rc);
304 void osp_statfs_need_now(struct osp_device *d);
307 void lprocfs_osp_init_vars(struct lprocfs_static_vars *lvars);
310 int osp_sync_declare_add(const struct lu_env *env, struct osp_object *o,
311 llog_op_type type, struct thandle *th);
312 int osp_sync_add(const struct lu_env *env, struct osp_object *o,
313 llog_op_type type, struct thandle *th,
314 const struct lu_attr *attr);
315 int osp_sync_init(const struct lu_env *env, struct osp_device *d);
316 int osp_sync_fini(struct osp_device *d);
317 void __osp_sync_check_for_work(struct osp_device *d);
320 int osp_init_for_ost(const struct lu_env *env, struct osp_device *m,
321 struct lu_device_type *ldt, struct lustre_cfg *cfg);
322 int osp_disconnect(struct osp_device *d);
323 int osp_fini_for_ost(struct osp_device *osp);