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.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2011, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
33 extern int ldlm_srv_namespace_nr;
34 extern int ldlm_cli_namespace_nr;
35 extern struct mutex ldlm_srv_namespace_lock;
36 extern struct list_head ldlm_srv_namespace_list;
37 extern struct mutex ldlm_cli_namespace_lock;
38 extern struct list_head ldlm_cli_active_namespace_list;
39 extern struct list_head ldlm_cli_inactive_namespace_list;
40 extern unsigned int ldlm_cancel_unused_locks_before_replay;
41 extern struct kmem_cache *ldlm_glimpse_work_kmem;
43 static inline int ldlm_namespace_nr_read(enum ldlm_side client)
45 return client == LDLM_NAMESPACE_SERVER ?
46 ldlm_srv_namespace_nr : ldlm_cli_namespace_nr;
49 static inline void ldlm_namespace_nr_inc(enum ldlm_side client)
51 if (client == LDLM_NAMESPACE_SERVER)
52 ldlm_srv_namespace_nr++;
54 ldlm_cli_namespace_nr++;
57 static inline void ldlm_namespace_nr_dec(enum ldlm_side client)
59 if (client == LDLM_NAMESPACE_SERVER)
60 ldlm_srv_namespace_nr--;
62 ldlm_cli_namespace_nr--;
65 static inline struct list_head *ldlm_namespace_list(enum ldlm_side client)
67 return client == LDLM_NAMESPACE_SERVER ?
68 &ldlm_srv_namespace_list : &ldlm_cli_active_namespace_list;
72 struct list_head *ldlm_namespace_inactive_list(enum ldlm_side client)
74 return client == LDLM_NAMESPACE_SERVER ?
75 &ldlm_srv_namespace_list : &ldlm_cli_inactive_namespace_list;
78 static inline struct mutex *ldlm_namespace_lock(enum ldlm_side client)
80 return client == LDLM_NAMESPACE_SERVER ?
81 &ldlm_srv_namespace_lock : &ldlm_cli_namespace_lock;
84 /* ns_bref is the number of resources in this namespace */
85 static inline int ldlm_ns_empty(struct ldlm_namespace *ns)
87 return atomic_read(&ns->ns_bref) == 0;
90 void ldlm_namespace_move_to_active_locked(struct ldlm_namespace *,
92 void ldlm_namespace_move_to_inactive_locked(struct ldlm_namespace *,
94 struct ldlm_namespace *ldlm_namespace_first_locked(enum ldlm_side);
97 /* Cancel lru flag, it indicates we cancel aged locks. */
99 LDLM_LRU_FLAG_AGED = 0x01, /* Cancel aged locks (non LRU resize) */
100 LDLM_LRU_FLAG_PASSED = 0x02, /* Cancel passed number of locks */
101 LDLM_LRU_FLAG_SHRINK = 0x04, /* Cancel locks from shrinker */
102 LDLM_LRU_FLAG_LRUR = 0x08, /* Cancel locks from lru resize */
103 LDLM_LRU_FLAG_NO_WAIT = 0x10, /* Cancel locks w/o blocking (neither
104 * sending nor waiting for any RPCs) */
105 LDLM_LRU_FLAG_CLEANUP = 0x20, /* Used when clearing lru, tells
106 * prepare_lru_list to set discard flag
107 * on PR extent locks so we don't waste
108 * time saving pages that will be
109 * discarded momentarily */
112 int ldlm_cancel_lru(struct ldlm_namespace *ns, int nr,
113 enum ldlm_cancel_flags cancel_flags,
114 enum ldlm_lru_flags lru_flags);
115 int ldlm_cancel_lru_local(struct ldlm_namespace *ns,
116 struct list_head *cancels, int count, int max,
117 enum ldlm_cancel_flags cancel_flags,
118 enum ldlm_lru_flags lru_flags);
119 extern unsigned int ldlm_enqueue_min;
120 /* ldlm_resource.c */
121 extern struct kmem_cache *ldlm_resource_slab;
122 extern struct kmem_cache *ldlm_lock_slab;
123 extern struct kmem_cache *ldlm_inodebits_slab;
124 extern struct kmem_cache *ldlm_interval_tree_slab;
126 void ldlm_resource_insert_lock_after(struct ldlm_lock *original,
127 struct ldlm_lock *new);
134 LDLM_WORK_REVOKE_AST,
138 void ldlm_grant_lock_with_skiplist(struct ldlm_lock *lock);
139 void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list);
140 int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
141 enum req_location loc, void *data, int size);
143 ldlm_lock_create(struct ldlm_namespace *ns, const struct ldlm_res_id *,
144 enum ldlm_type type, enum ldlm_mode mode,
145 const struct ldlm_callback_suite *cbs,
146 void *data, __u32 lvb_len, enum lvb_type lvb_type);
147 enum ldlm_error ldlm_lock_enqueue(const struct lu_env *env,
148 struct ldlm_namespace *,
150 void *cookie, __u64 *flags);
151 void ldlm_lock_addref_internal(struct ldlm_lock *, enum ldlm_mode mode);
152 void ldlm_lock_addref_internal_nolock(struct ldlm_lock *, enum ldlm_mode mode);
153 void ldlm_lock_decref_internal(struct ldlm_lock *, enum ldlm_mode mode);
154 void ldlm_lock_decref_internal_nolock(struct ldlm_lock *, enum ldlm_mode mode);
155 void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
156 struct list_head *work_list);
157 #ifdef HAVE_SERVER_SUPPORT
158 int ldlm_reprocess_queue(struct ldlm_resource *res, struct list_head *queue,
159 struct list_head *work_list,
160 enum ldlm_process_intention intention,
161 struct ldlm_lock *hint);
162 int ldlm_handle_conflict_lock(struct ldlm_lock *lock, __u64 *flags,
163 struct list_head *rpc_list);
164 void ldlm_discard_bl_list(struct list_head *bl_list);
165 void ldlm_clear_blocking_lock(struct ldlm_lock *lock);
166 void ldlm_clear_blocking_data(struct ldlm_lock *lock);
168 int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list,
169 ldlm_desc_ast_t ast_type);
170 int ldlm_work_gl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq);
171 int ldlm_lock_remove_from_lru_check(struct ldlm_lock *lock, ktime_t last_use);
172 #define ldlm_lock_remove_from_lru(lock) \
173 ldlm_lock_remove_from_lru_check(lock, ktime_set(0, 0))
174 int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock);
175 void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock);
176 void ldlm_lock_add_to_lru(struct ldlm_lock *lock);
177 void ldlm_lock_touch_in_lru(struct ldlm_lock *lock);
178 void ldlm_lock_destroy_nolock(struct ldlm_lock *lock);
180 int ldlm_export_cancel_blocked_locks(struct obd_export *exp);
181 int ldlm_export_cancel_locks(struct obd_export *exp);
182 void ldlm_grant_lock_with_skiplist(struct ldlm_lock *lock);
185 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
186 struct ldlm_lock *lock);
187 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns,
188 struct ldlm_lock_desc *ld,
189 struct list_head *cancels, int count,
190 enum ldlm_cancel_flags cancel_flags);
191 int ldlm_bl_thread_wakeup(void);
193 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
194 struct ldlm_lock_desc *ld, struct ldlm_lock *lock);
195 void ldlm_bl_desc2lock(const struct ldlm_lock_desc *ld, struct ldlm_lock *lock);
197 #ifdef HAVE_SERVER_SUPPORT
199 int ldlm_process_plain_lock(struct ldlm_lock *lock, __u64 *flags,
200 enum ldlm_process_intention intention,
201 enum ldlm_error *err, struct list_head *work_list);
203 /* ldlm_inodebits.c */
204 int ldlm_process_inodebits_lock(struct ldlm_lock *lock, __u64 *flags,
205 enum ldlm_process_intention intention,
206 enum ldlm_error *err,
207 struct list_head *work_list);
208 int ldlm_reprocess_inodebits_queue(struct ldlm_resource *res,
209 struct list_head *queue,
210 struct list_head *work_list,
211 enum ldlm_process_intention intention,
212 struct ldlm_lock *hint);
214 int ldlm_process_extent_lock(struct ldlm_lock *lock, __u64 *flags,
215 enum ldlm_process_intention intention,
216 enum ldlm_error *err, struct list_head *work_list);
218 int ldlm_extent_alloc_lock(struct ldlm_lock *lock);
219 void ldlm_extent_add_lock(struct ldlm_resource *res, struct ldlm_lock *lock);
220 void ldlm_extent_unlink_lock(struct ldlm_lock *lock);
222 int ldlm_inodebits_alloc_lock(struct ldlm_lock *lock);
223 void ldlm_inodebits_add_lock(struct ldlm_resource *res, struct list_head *head,
224 struct ldlm_lock *lock);
225 void ldlm_inodebits_unlink_lock(struct ldlm_lock *lock);
228 int ldlm_process_flock_lock(struct ldlm_lock *req, __u64 *flags,
229 enum ldlm_process_intention intention,
230 enum ldlm_error *err, struct list_head *work_list);
231 int ldlm_init_flock_export(struct obd_export *exp);
232 void ldlm_destroy_flock_export(struct obd_export *exp);
235 void l_check_ns_lock(struct ldlm_namespace *ns);
236 void l_check_no_ns_lock(struct ldlm_namespace *ns);
238 extern struct dentry *ldlm_svc_debugfs_dir;
241 struct ptlrpc_service *ldlm_cb_service;
242 struct ptlrpc_service *ldlm_cancel_service;
243 struct ptlrpc_client *ldlm_client;
244 struct ldlm_bl_pool *ldlm_bl_pool;
247 /* interval tree, for LDLM_EXTENT. */
248 extern struct kmem_cache *ldlm_interval_slab; /* slab cache for ldlm_interval */
249 extern void ldlm_interval_attach(struct ldlm_interval *n, struct ldlm_lock *l);
250 extern struct ldlm_interval *ldlm_interval_detach(struct ldlm_lock *l);
251 extern void ldlm_interval_free(struct ldlm_interval *node);
252 /* this function must be called with res lock held */
253 static inline struct ldlm_extent *
254 ldlm_interval_extent(struct ldlm_interval *node)
256 struct ldlm_lock *lock;
257 LASSERT(!list_empty(&node->li_group));
259 lock = list_entry(node->li_group.next, struct ldlm_lock,
261 return &lock->l_policy_data.l_extent;
265 void ldlm_exit(void);
267 enum ldlm_policy_res {
268 LDLM_POLICY_CANCEL_LOCK,
269 LDLM_POLICY_KEEP_LOCK,
270 LDLM_POLICY_SKIP_LOCK
273 #define LDLM_POOL_SYSFS_PRINT_int(v) sprintf(buf, "%d\n", v)
274 #define LDLM_POOL_SYSFS_SET_int(a, b) { a = b; }
275 #define LDLM_POOL_SYSFS_PRINT_u64(v) sprintf(buf, "%lld\n", v)
276 #define LDLM_POOL_SYSFS_SET_u64(a, b) { a = b; }
277 #define LDLM_POOL_SYSFS_PRINT_atomic(v) sprintf(buf, "%d\n", atomic_read(&v))
278 #define LDLM_POOL_SYSFS_SET_atomic(a, b) atomic_set(&a, b)
280 #define LDLM_POOL_SYSFS_READER_SHOW(var, type) \
281 static ssize_t var##_show(struct kobject *kobj, \
282 struct attribute *attr, \
285 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
289 spin_lock(&pl->pl_lock); \
290 tmp = pl->pl_##var; \
291 spin_unlock(&pl->pl_lock); \
293 return LDLM_POOL_SYSFS_PRINT_##type(tmp); \
295 struct __##var##__dummy_read {;} /* semicolon catcher */
297 #define LDLM_POOL_SYSFS_WRITER_STORE(var, type) \
298 static ssize_t var##_store(struct kobject *kobj, \
299 struct attribute *attr, \
300 const char *buffer, \
303 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
308 rc = kstrtoul(buffer, 10, &tmp); \
313 spin_lock(&pl->pl_lock); \
314 LDLM_POOL_SYSFS_SET_##type(pl->pl_##var, tmp); \
315 spin_unlock(&pl->pl_lock); \
319 struct __##var##__dummy_write {; } /* semicolon catcher */
321 #define LDLM_POOL_SYSFS_READER_NOLOCK_SHOW(var, type) \
322 static ssize_t var##_show(struct kobject *kobj, \
323 struct attribute *attr, \
326 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
329 return LDLM_POOL_SYSFS_PRINT_##type(pl->pl_##var); \
331 struct __##var##__dummy_read {; } /* semicolon catcher */
333 #define LDLM_POOL_SYSFS_WRITER_NOLOCK_STORE(var, type) \
334 static ssize_t var##_store(struct kobject *kobj, \
335 struct attribute *attr, \
336 const char *buffer, \
339 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
344 rc = kstrtoul(buffer, 10, &tmp); \
349 LDLM_POOL_SYSFS_SET_##type(pl->pl_##var, tmp); \
353 struct __##var##__dummy_write {; } /* semicolon catcher */
356 ldlm_add_var(struct lprocfs_vars *vars, struct dentry *debugfs_entry,
357 const char *name, void *data, const struct file_operations *ops)
362 ldebugfs_add_vars(debugfs_entry, vars, NULL);
365 static inline int is_granted_or_cancelled(struct ldlm_lock *lock)
369 lock_res_and_lock(lock);
370 ret = is_granted_or_cancelled_nolock(lock);
371 unlock_res_and_lock(lock);
376 static inline bool is_bl_done(struct ldlm_lock *lock)
380 if (!ldlm_is_bl_done(lock)) {
381 lock_res_and_lock(lock);
382 bl_done = ldlm_is_bl_done(lock);
383 unlock_res_and_lock(lock);
389 static inline bool is_lock_converted(struct ldlm_lock *lock)
393 lock_res_and_lock(lock);
394 ret = (lock->l_policy_data.l_inodebits.cancel_bits == 0);
395 unlock_res_and_lock(lock);
400 typedef void (*ldlm_policy_wire_to_local_t)(const union ldlm_wire_policy_data *,
401 union ldlm_policy_data *);
402 typedef void (*ldlm_policy_local_to_wire_t)(const union ldlm_policy_data *,
403 union ldlm_wire_policy_data *);
404 void ldlm_plain_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
405 union ldlm_policy_data *lpolicy);
406 void ldlm_plain_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
407 union ldlm_wire_policy_data *wpolicy);
408 void ldlm_ibits_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
409 union ldlm_policy_data *lpolicy);
410 void ldlm_ibits_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
411 union ldlm_wire_policy_data *wpolicy);
412 void ldlm_extent_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
413 union ldlm_policy_data *lpolicy);
414 void ldlm_extent_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
415 union ldlm_wire_policy_data *wpolicy);
416 void ldlm_flock_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
417 union ldlm_policy_data *lpolicy);
418 void ldlm_flock_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
419 union ldlm_wire_policy_data *wpolicy);
422 #ifdef HAVE_SERVER_SUPPORT
423 extern __u64 ldlm_reclaim_threshold;
424 extern __u64 ldlm_lock_limit;
425 extern __u64 ldlm_reclaim_threshold_mb;
426 extern __u64 ldlm_lock_limit_mb;
427 extern struct percpu_counter ldlm_granted_total;
429 int ldlm_reclaim_setup(void);
430 void ldlm_reclaim_cleanup(void);
431 void ldlm_reclaim_add(struct ldlm_lock *lock);
432 void ldlm_reclaim_del(struct ldlm_lock *lock);
433 bool ldlm_reclaim_full(void);
435 static inline bool ldlm_res_eq(const struct ldlm_res_id *res0,
436 const struct ldlm_res_id *res1)
438 return memcmp(res0, res1, sizeof(*res0)) == 0;