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, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2012, Intel, Inc.
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 <dt_object.h>
46 #include <lustre_fid.h>
49 * Infrastructure to support tracking of last committed llog record
51 struct osp_id_tracker {
52 cfs_spinlock_t otr_lock;
54 __u32 otr_committed_id;
55 /* callback is register once per diskfs -- that's the whole point */
56 struct dt_txn_callback otr_tx_cb;
57 /* single node can run many clusters */
58 cfs_list_t otr_wakeup_list;
60 /* underlying shared device */
61 struct dt_device *otr_dev;
62 /* how many users of this tracker */
63 cfs_atomic_t otr_refcount;
67 struct dt_device opd_dt_dev;
68 /* corresponded OST index */
70 /* device used to store persistent state (llogs, last ids) */
71 struct obd_export *opd_storage_exp;
72 struct dt_device *opd_storage;
73 struct dt_object *opd_last_used_file;
75 /* stored persistently in LE format, updated directly to/from disk
76 * and required le64_to_cpu() conversion before use.
77 * Protected by opd_pre_lock */
78 volatile obd_id opd_last_used_id;
82 /* connection to OST */
83 struct obd_device *opd_obd;
84 struct obd_export *opd_exp;
85 struct obd_uuid opd_cluuid;
86 struct obd_connect_data *opd_connect_data;
88 cfs_proc_dir_entry_t *opd_proc_entry;
89 struct lprocfs_stats *opd_stats;
90 /* connection status. */
91 int opd_new_connection;
92 int opd_got_disconnected;
93 int opd_imp_connected;
95 int opd_imp_seen_connected:1;
97 /* whether local recovery is completed:
98 * reported via ->ldo_recovery_complete() */
99 int opd_recovery_completed;
104 cfs_spinlock_t opd_pre_lock;
105 /* next id to assign in creation */
107 /* last created id OST reported, next-created - available id's */
108 __u64 opd_pre_last_created;
109 /* how many ids are reserved in declare, we shouldn't block in create */
110 __u64 opd_pre_reserved;
111 /* dedicate precreate thread */
112 struct ptlrpc_thread opd_pre_thread;
113 /* thread waits for signals about pool going empty */
114 cfs_waitq_t opd_pre_waitq;
115 /* consumers (who needs new ids) wait here */
116 cfs_waitq_t opd_pre_user_waitq;
117 /* current precreation status: working, failed, stopping? */
119 /* how many to precreate next time */
120 int opd_pre_grow_count;
121 int opd_pre_min_grow_count;
122 int opd_pre_max_grow_count;
123 /* whether to grow precreation window next time or not */
124 int opd_pre_grow_slow;
127 * OST synchronization
129 cfs_spinlock_t opd_syn_lock;
130 /* unique generation, to recognize start of new records in the llog */
131 struct llog_gen opd_syn_generation;
132 /* number of changes to sync, used to wake up sync thread */
133 unsigned long opd_syn_changes;
134 /* processing of changes from previous mount is done? */
135 int opd_syn_prev_done;
137 struct ptlrpc_thread opd_syn_thread;
138 cfs_waitq_t opd_syn_waitq;
139 /* list of remotely committed rpc */
140 cfs_list_t opd_syn_committed_there;
141 /* number of changes being under sync */
142 int opd_syn_sync_in_progress;
143 /* number of RPCs in flight - flow control */
144 int opd_syn_rpc_in_flight;
145 int opd_syn_max_rpc_in_flight;
146 /* number of RPC in processing (including non-committed by OST) */
147 int opd_syn_rpc_in_progress;
148 int opd_syn_max_rpc_in_progress;
149 /* osd api's commit cb control structure */
150 struct dt_txn_callback opd_syn_txn_cb;
151 /* last used change number -- semantically similar to transno */
152 unsigned long opd_syn_last_used_id;
153 /* last committed change number -- semantically similar to
155 unsigned long opd_syn_last_committed_id;
156 /* last processed (taken from llog) id */
157 unsigned long opd_syn_last_processed_id;
158 struct osp_id_tracker *opd_syn_tracker;
159 cfs_list_t opd_syn_ontrack;
162 * statfs related fields: OSP maintains it on its own
164 struct obd_statfs opd_statfs;
165 cfs_time_t opd_statfs_fresh_till;
166 cfs_timer_t opd_statfs_timer;
167 int opd_statfs_update_in_progress;
168 /* how often to update statfs data */
169 int opd_statfs_maxage;
171 cfs_proc_dir_entry_t *opd_symlink;
174 extern cfs_mem_cache_t *osp_object_kmem;
176 /* this is a top object */
178 struct lu_object_header opo_header;
179 struct dt_object opo_obj;
184 extern struct lu_object_operations osp_lu_obj_ops;
186 struct osp_thread_info {
187 struct lu_buf osi_lb;
188 struct lu_fid osi_fid;
189 struct lu_attr osi_attr;
190 struct ost_id osi_oi;
194 struct llog_rec_hdr osi_hdr;
195 struct llog_unlink64_rec osi_unlink;
196 struct llog_setattr64_rec osi_setattr;
197 struct llog_gen_rec osi_gen;
199 struct llog_cookie osi_cookie;
200 struct llog_catid osi_cid;
203 static inline void osp_objid_buf_prep(struct osp_thread_info *osi,
204 struct osp_device *d, int index)
206 osi->osi_lb.lb_buf = (void *)&d->opd_last_used_id;
207 osi->osi_lb.lb_len = sizeof(d->opd_last_used_id);
208 osi->osi_off = sizeof(d->opd_last_used_id) * index;
211 extern struct lu_context_key osp_thread_key;
213 static inline struct osp_thread_info *osp_env_info(const struct lu_env *env)
215 struct osp_thread_info *info;
217 info = lu_context_key_get(&env->le_ctx, &osp_thread_key);
219 lu_env_refill((struct lu_env *)env);
220 info = lu_context_key_get(&env->le_ctx, &osp_thread_key);
226 struct osp_txn_info {
227 __u32 oti_current_id;
230 extern struct lu_context_key osp_txn_key;
232 static inline struct osp_txn_info *osp_txn_info(struct lu_context *ctx)
234 struct osp_txn_info *info;
236 info = lu_context_key_get(ctx, &osp_txn_key);
240 extern const struct lu_device_operations osp_lu_ops;
242 static inline int lu_device_is_osp(struct lu_device *d)
244 return ergo(d != NULL && d->ld_ops != NULL, d->ld_ops == &osp_lu_ops);
247 static inline struct osp_device *lu2osp_dev(struct lu_device *d)
249 LASSERT(lu_device_is_osp(d));
250 return container_of0(d, struct osp_device, opd_dt_dev.dd_lu_dev);
253 static inline struct lu_device *osp2lu_dev(struct osp_device *d)
255 return &d->opd_dt_dev.dd_lu_dev;
258 static inline struct osp_device *dt2osp_dev(struct dt_device *d)
260 LASSERT(lu_device_is_osp(&d->dd_lu_dev));
261 return container_of0(d, struct osp_device, opd_dt_dev);
264 static inline struct osp_object *lu2osp_obj(struct lu_object *o)
266 LASSERT(ergo(o != NULL, lu_device_is_osp(o->lo_dev)));
267 return container_of0(o, struct osp_object, opo_obj.do_lu);
270 static inline struct lu_object *osp2lu_obj(struct osp_object *obj)
272 return &obj->opo_obj.do_lu;
275 static inline struct osp_object *osp_obj(const struct lu_object *o)
277 LASSERT(lu_device_is_osp(o->lo_dev));
278 return container_of0(o, struct osp_object, opo_obj.do_lu);
281 static inline struct osp_object *dt2osp_obj(const struct dt_object *d)
283 return osp_obj(&d->do_lu);
286 static inline struct dt_object *osp_object_child(struct osp_object *o)
288 return container_of0(lu_object_next(osp2lu_obj(o)),
289 struct dt_object, do_lu);
293 void osp_update_last_id(struct osp_device *d, obd_id objid);
295 /* osp_precreate.c */
296 int osp_init_precreate(struct osp_device *d);
297 int osp_precreate_reserve(const struct lu_env *env, struct osp_device *d);
298 __u64 osp_precreate_get_id(struct osp_device *d);
299 void osp_precreate_fini(struct osp_device *d);
300 int osp_object_truncate(const struct lu_env *env, struct dt_object *dt, __u64);
301 void osp_pre_update_status(struct osp_device *d, int rc);
302 void osp_statfs_need_now(struct osp_device *d);
305 void lprocfs_osp_init_vars(struct lprocfs_static_vars *lvars);
308 int osp_sync_declare_add(const struct lu_env *env, struct osp_object *o,
309 llog_op_type type, struct thandle *th);
310 int osp_sync_add(const struct lu_env *env, struct osp_object *o,
311 llog_op_type type, struct thandle *th,
312 const struct lu_attr *attr);
313 int osp_sync_init(const struct lu_env *env, struct osp_device *d);
314 int osp_sync_fini(struct osp_device *d);
315 void __osp_sync_check_for_work(struct osp_device *d);