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_NO_WAIT = 0x1, /* Cancel locks w/o blocking (neither
100 * sending nor waiting for any RPCs) */
101 LDLM_LRU_FLAG_CLEANUP = 0x2, /* Used when clearing lru, tells
102 * prepare_lru_list to set discard flag
103 * on PR extent locks so we don't waste
104 * time saving pages that will be
105 * discarded momentarily */
108 int ldlm_cancel_lru(struct ldlm_namespace *ns, int min,
109 enum ldlm_cancel_flags cancel_flags,
110 enum ldlm_lru_flags lru_flags);
111 int ldlm_cancel_lru_local(struct ldlm_namespace *ns,
112 struct list_head *cancels, int min, int max,
113 enum ldlm_cancel_flags cancel_flags,
114 enum ldlm_lru_flags lru_flags);
115 extern unsigned int ldlm_enqueue_min;
116 /* ldlm_resource.c */
117 extern struct kmem_cache *ldlm_resource_slab;
118 extern struct kmem_cache *ldlm_lock_slab;
119 extern struct kmem_cache *ldlm_inodebits_slab;
120 extern struct kmem_cache *ldlm_interval_tree_slab;
122 void ldlm_resource_insert_lock_after(struct ldlm_lock *original,
123 struct ldlm_lock *new);
124 void ldlm_resource_insert_lock_before(struct ldlm_lock *original,
125 struct ldlm_lock *new);
132 LDLM_WORK_REVOKE_AST,
136 void ldlm_grant_lock_with_skiplist(struct ldlm_lock *lock);
137 void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list);
138 int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
139 enum req_location loc, void *data, int size);
141 ldlm_lock_create(struct ldlm_namespace *ns, const struct ldlm_res_id *,
142 enum ldlm_type type, enum ldlm_mode mode,
143 const struct ldlm_callback_suite *cbs,
144 void *data, __u32 lvb_len, enum lvb_type lvb_type);
145 enum ldlm_error ldlm_lock_enqueue(const struct lu_env *env,
146 struct ldlm_namespace *,
148 void *cookie, __u64 *flags);
149 void ldlm_lock_addref_internal(struct ldlm_lock *, enum ldlm_mode mode);
150 void ldlm_lock_addref_internal_nolock(struct ldlm_lock *, enum ldlm_mode mode);
151 void ldlm_lock_decref_internal(struct ldlm_lock *, enum ldlm_mode mode);
152 void ldlm_lock_decref_internal_nolock(struct ldlm_lock *, enum ldlm_mode mode);
153 void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
154 struct list_head *work_list);
155 #ifdef HAVE_SERVER_SUPPORT
156 int ldlm_reprocess_queue(struct ldlm_resource *res, struct list_head *queue,
157 struct list_head *work_list,
158 enum ldlm_process_intention intention,
159 struct ldlm_lock *hint);
160 int ldlm_handle_conflict_lock(struct ldlm_lock *lock, __u64 *flags,
161 struct list_head *rpc_list);
162 void ldlm_discard_bl_list(struct list_head *bl_list);
163 void ldlm_clear_blocking_lock(struct ldlm_lock *lock);
164 void ldlm_clear_blocking_data(struct ldlm_lock *lock);
166 int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list,
167 ldlm_desc_ast_t ast_type);
168 int ldlm_work_gl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq);
169 int ldlm_lock_remove_from_lru_check(struct ldlm_lock *lock, ktime_t last_use);
170 #define ldlm_lock_remove_from_lru(lock) \
171 ldlm_lock_remove_from_lru_check(lock, ktime_set(0, 0))
172 int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock);
173 void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock);
174 void ldlm_lock_touch_in_lru(struct ldlm_lock *lock);
175 void ldlm_lock_destroy_nolock(struct ldlm_lock *lock);
177 int ldlm_export_cancel_blocked_locks(struct obd_export *exp);
178 int ldlm_export_cancel_locks(struct obd_export *exp);
179 void ldlm_grant_lock_with_skiplist(struct ldlm_lock *lock);
182 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
183 struct ldlm_lock *lock);
184 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns,
185 struct ldlm_lock_desc *ld,
186 struct list_head *cancels, int count,
187 enum ldlm_cancel_flags cancel_flags);
188 int ldlm_bl_thread_wakeup(void);
190 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
191 struct ldlm_lock_desc *ld, struct ldlm_lock *lock);
192 void ldlm_bl_desc2lock(const struct ldlm_lock_desc *ld, struct ldlm_lock *lock);
194 #ifdef HAVE_SERVER_SUPPORT
196 int ldlm_process_plain_lock(struct ldlm_lock *lock, __u64 *flags,
197 enum ldlm_process_intention intention,
198 enum ldlm_error *err, struct list_head *work_list);
200 /* ldlm_inodebits.c */
201 int ldlm_process_inodebits_lock(struct ldlm_lock *lock, __u64 *flags,
202 enum ldlm_process_intention intention,
203 enum ldlm_error *err,
204 struct list_head *work_list);
205 int ldlm_reprocess_inodebits_queue(struct ldlm_resource *res,
206 struct list_head *queue,
207 struct list_head *work_list,
208 enum ldlm_process_intention intention,
209 struct ldlm_lock *hint);
211 int ldlm_process_extent_lock(struct ldlm_lock *lock, __u64 *flags,
212 enum ldlm_process_intention intention,
213 enum ldlm_error *err, struct list_head *work_list);
215 int ldlm_extent_alloc_lock(struct ldlm_lock *lock);
216 void ldlm_extent_add_lock(struct ldlm_resource *res, struct ldlm_lock *lock);
217 void ldlm_extent_unlink_lock(struct ldlm_lock *lock);
219 int ldlm_inodebits_alloc_lock(struct ldlm_lock *lock);
220 void ldlm_inodebits_add_lock(struct ldlm_resource *res, struct list_head *head,
221 struct ldlm_lock *lock);
222 void ldlm_inodebits_unlink_lock(struct ldlm_lock *lock);
225 int ldlm_process_flock_lock(struct ldlm_lock *req, __u64 *flags,
226 enum ldlm_process_intention intention,
227 enum ldlm_error *err, struct list_head *work_list);
228 int ldlm_init_flock_export(struct obd_export *exp);
229 void ldlm_destroy_flock_export(struct obd_export *exp);
232 void l_check_ns_lock(struct ldlm_namespace *ns);
233 void l_check_no_ns_lock(struct ldlm_namespace *ns);
235 extern struct dentry *ldlm_svc_debugfs_dir;
238 struct ptlrpc_service *ldlm_cb_service;
239 struct ptlrpc_service *ldlm_cancel_service;
240 struct ptlrpc_client *ldlm_client;
241 struct ldlm_bl_pool *ldlm_bl_pool;
244 /* interval tree, for LDLM_EXTENT. */
245 extern struct kmem_cache *ldlm_interval_slab; /* slab cache for ldlm_interval */
246 extern void ldlm_interval_attach(struct ldlm_interval *n, struct ldlm_lock *l);
247 extern struct ldlm_interval *ldlm_interval_detach(struct ldlm_lock *l);
248 extern void ldlm_interval_free(struct ldlm_interval *node);
249 /* this function must be called with res lock held */
250 static inline struct ldlm_extent *
251 ldlm_interval_extent(struct ldlm_interval *node)
253 struct ldlm_lock *lock;
254 LASSERT(!list_empty(&node->li_group));
256 lock = list_entry(node->li_group.next, struct ldlm_lock,
258 return &lock->l_policy_data.l_extent;
262 void ldlm_exit(void);
264 enum ldlm_policy_res {
265 LDLM_POLICY_CANCEL_LOCK,
266 LDLM_POLICY_KEEP_LOCK,
267 LDLM_POLICY_SKIP_LOCK
270 #define LDLM_POOL_SYSFS_PRINT_int(v) sprintf(buf, "%d\n", v)
271 #define LDLM_POOL_SYSFS_SET_int(a, b) { a = b; }
272 #define LDLM_POOL_SYSFS_PRINT_u64(v) sprintf(buf, "%lld\n", v)
273 #define LDLM_POOL_SYSFS_SET_u64(a, b) { a = b; }
274 #define LDLM_POOL_SYSFS_PRINT_atomic(v) sprintf(buf, "%d\n", atomic_read(&v))
275 #define LDLM_POOL_SYSFS_SET_atomic(a, b) atomic_set(&a, b)
277 #define LDLM_POOL_SYSFS_READER_SHOW(var, type) \
278 static ssize_t var##_show(struct kobject *kobj, \
279 struct attribute *attr, \
282 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
286 spin_lock(&pl->pl_lock); \
287 tmp = pl->pl_##var; \
288 spin_unlock(&pl->pl_lock); \
290 return LDLM_POOL_SYSFS_PRINT_##type(tmp); \
292 struct __##var##__dummy_read {;} /* semicolon catcher */
294 #define LDLM_POOL_SYSFS_WRITER_STORE(var, type) \
295 static ssize_t var##_store(struct kobject *kobj, \
296 struct attribute *attr, \
297 const char *buffer, \
300 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
305 rc = kstrtoul(buffer, 10, &tmp); \
310 spin_lock(&pl->pl_lock); \
311 LDLM_POOL_SYSFS_SET_##type(pl->pl_##var, tmp); \
312 spin_unlock(&pl->pl_lock); \
316 struct __##var##__dummy_write {; } /* semicolon catcher */
318 #define LDLM_POOL_SYSFS_READER_NOLOCK_SHOW(var, type) \
319 static ssize_t var##_show(struct kobject *kobj, \
320 struct attribute *attr, \
323 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
326 return LDLM_POOL_SYSFS_PRINT_##type(pl->pl_##var); \
328 struct __##var##__dummy_read {; } /* semicolon catcher */
330 #define LDLM_POOL_SYSFS_WRITER_NOLOCK_STORE(var, type) \
331 static ssize_t var##_store(struct kobject *kobj, \
332 struct attribute *attr, \
333 const char *buffer, \
336 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
341 rc = kstrtoul(buffer, 10, &tmp); \
346 LDLM_POOL_SYSFS_SET_##type(pl->pl_##var, tmp); \
350 struct __##var##__dummy_write {; } /* semicolon catcher */
353 ldlm_add_var(struct ldebugfs_vars *vars, struct dentry *debugfs_entry,
354 const char *name, void *data, const struct file_operations *ops)
359 ldebugfs_add_vars(debugfs_entry, vars, NULL);
362 static inline int is_granted_or_cancelled(struct ldlm_lock *lock)
366 lock_res_and_lock(lock);
367 ret = is_granted_or_cancelled_nolock(lock);
368 unlock_res_and_lock(lock);
373 static inline bool is_bl_done(struct ldlm_lock *lock)
377 if (!ldlm_is_bl_done(lock)) {
378 lock_res_and_lock(lock);
379 bl_done = ldlm_is_bl_done(lock);
380 unlock_res_and_lock(lock);
386 static inline bool is_lock_converted(struct ldlm_lock *lock)
390 lock_res_and_lock(lock);
391 ret = (lock->l_policy_data.l_inodebits.cancel_bits == 0);
392 unlock_res_and_lock(lock);
397 typedef void (*ldlm_policy_wire_to_local_t)(const union ldlm_wire_policy_data *,
398 union ldlm_policy_data *);
399 typedef void (*ldlm_policy_local_to_wire_t)(const union ldlm_policy_data *,
400 union ldlm_wire_policy_data *);
401 void ldlm_plain_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
402 union ldlm_policy_data *lpolicy);
403 void ldlm_plain_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
404 union ldlm_wire_policy_data *wpolicy);
405 void ldlm_ibits_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
406 union ldlm_policy_data *lpolicy);
407 void ldlm_ibits_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
408 union ldlm_wire_policy_data *wpolicy);
409 void ldlm_extent_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
410 union ldlm_policy_data *lpolicy);
411 void ldlm_extent_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
412 union ldlm_wire_policy_data *wpolicy);
413 void ldlm_flock_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
414 union ldlm_policy_data *lpolicy);
415 void ldlm_flock_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
416 union ldlm_wire_policy_data *wpolicy);
419 #ifdef HAVE_SERVER_SUPPORT
420 extern __u64 ldlm_reclaim_threshold;
421 extern __u64 ldlm_lock_limit;
422 extern __u64 ldlm_reclaim_threshold_mb;
423 extern __u64 ldlm_lock_limit_mb;
424 extern struct percpu_counter ldlm_granted_total;
426 int ldlm_reclaim_setup(void);
427 void ldlm_reclaim_cleanup(void);
428 void ldlm_reclaim_add(struct ldlm_lock *lock);
429 void ldlm_reclaim_del(struct ldlm_lock *lock);
430 bool ldlm_reclaim_full(void);
432 static inline bool ldlm_res_eq(const struct ldlm_res_id *res0,
433 const struct ldlm_res_id *res1)
435 return memcmp(res0, res1, sizeof(*res0)) == 0;