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/
32 extern int ldlm_srv_namespace_nr;
33 extern int ldlm_cli_namespace_nr;
34 extern struct mutex ldlm_srv_namespace_lock;
35 extern struct list_head ldlm_srv_namespace_list;
36 extern struct mutex ldlm_cli_namespace_lock;
37 extern struct list_head ldlm_cli_active_namespace_list;
38 extern struct list_head ldlm_cli_inactive_namespace_list;
39 extern unsigned int ldlm_cancel_unused_locks_before_replay;
40 extern struct kmem_cache *ldlm_glimpse_work_kmem;
42 static inline int ldlm_namespace_nr_read(enum ldlm_side client)
44 return client == LDLM_NAMESPACE_SERVER ?
45 ldlm_srv_namespace_nr : ldlm_cli_namespace_nr;
48 static inline void ldlm_namespace_nr_inc(enum ldlm_side client)
50 if (client == LDLM_NAMESPACE_SERVER)
51 ldlm_srv_namespace_nr++;
53 ldlm_cli_namespace_nr++;
56 static inline void ldlm_namespace_nr_dec(enum ldlm_side client)
58 if (client == LDLM_NAMESPACE_SERVER)
59 ldlm_srv_namespace_nr--;
61 ldlm_cli_namespace_nr--;
64 static inline struct list_head *ldlm_namespace_list(enum ldlm_side client)
66 return client == LDLM_NAMESPACE_SERVER ?
67 &ldlm_srv_namespace_list : &ldlm_cli_active_namespace_list;
71 struct list_head *ldlm_namespace_inactive_list(enum ldlm_side client)
73 return client == LDLM_NAMESPACE_SERVER ?
74 &ldlm_srv_namespace_list : &ldlm_cli_inactive_namespace_list;
77 static inline struct mutex *ldlm_namespace_lock(enum ldlm_side client)
79 return client == LDLM_NAMESPACE_SERVER ?
80 &ldlm_srv_namespace_lock : &ldlm_cli_namespace_lock;
83 /* ns_bref is the number of resources in this namespace */
84 static inline int ldlm_ns_empty(struct ldlm_namespace *ns)
86 return atomic_read(&ns->ns_bref) == 0;
89 void ldlm_namespace_move_to_active_locked(struct ldlm_namespace *,
91 void ldlm_namespace_move_to_inactive_locked(struct ldlm_namespace *,
93 struct ldlm_namespace *ldlm_namespace_first_locked(enum ldlm_side);
96 int ldlm_cancel_lru(struct ldlm_namespace *ns, int min,
97 enum ldlm_cancel_flags cancel_flags,
98 enum ldlm_lru_flags lru_flags);
99 int ldlm_cancel_lru_local(struct ldlm_namespace *ns,
100 struct list_head *cancels, int min, int max,
101 enum ldlm_cancel_flags cancel_flags,
102 enum ldlm_lru_flags lru_flags);
103 extern unsigned int ldlm_enqueue_min;
104 /* ldlm_resource.c */
105 extern struct kmem_cache *ldlm_resource_slab;
106 extern struct kmem_cache *ldlm_lock_slab;
107 extern struct kmem_cache *ldlm_inodebits_slab;
108 extern struct kmem_cache *ldlm_interval_tree_slab;
110 void ldlm_resource_insert_lock_after(struct ldlm_lock *original,
111 struct ldlm_lock *new);
112 void ldlm_resource_insert_lock_before(struct ldlm_lock *original,
113 struct ldlm_lock *new);
120 LDLM_WORK_REVOKE_AST,
124 void ldlm_grant_lock_with_skiplist(struct ldlm_lock *lock);
125 void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list);
126 int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
127 enum req_location loc, void *data, int size);
129 ldlm_lock_create(struct ldlm_namespace *ns, const struct ldlm_res_id *,
130 enum ldlm_type type, enum ldlm_mode mode,
131 const struct ldlm_callback_suite *cbs,
132 void *data, __u32 lvb_len, enum lvb_type lvb_type);
133 enum ldlm_error ldlm_lock_enqueue(const struct lu_env *env,
134 struct ldlm_namespace *,
136 void *cookie, __u64 *flags);
137 void ldlm_lock_addref_internal(struct ldlm_lock *, enum ldlm_mode mode);
138 void ldlm_lock_addref_internal_nolock(struct ldlm_lock *, enum ldlm_mode mode);
139 void ldlm_lock_decref_internal(struct ldlm_lock *, enum ldlm_mode mode);
140 void ldlm_lock_decref_internal_nolock(struct ldlm_lock *, enum ldlm_mode mode);
141 void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
142 struct list_head *work_list);
143 #ifdef HAVE_SERVER_SUPPORT
144 int ldlm_reprocess_queue(struct ldlm_resource *res, struct list_head *queue,
145 struct list_head *work_list,
146 enum ldlm_process_intention intention, __u64 hint);
147 int ldlm_handle_conflict_lock(struct ldlm_lock *lock, __u64 *flags,
148 struct list_head *rpc_list);
149 void ldlm_discard_bl_list(struct list_head *bl_list);
150 void ldlm_clear_blocking_lock(struct ldlm_lock *lock);
151 void ldlm_clear_blocking_data(struct ldlm_lock *lock);
153 int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list,
154 ldlm_desc_ast_t ast_type);
155 int ldlm_work_gl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq);
156 int ldlm_lock_remove_from_lru_check(struct ldlm_lock *lock, ktime_t last_use);
157 #define ldlm_lock_remove_from_lru(lock) \
158 ldlm_lock_remove_from_lru_check(lock, ktime_set(0, 0))
159 int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock);
160 void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock);
161 void ldlm_lock_touch_in_lru(struct ldlm_lock *lock);
162 void ldlm_lock_destroy_nolock(struct ldlm_lock *lock);
164 int ldlm_export_cancel_blocked_locks(struct obd_export *exp);
165 int ldlm_export_cancel_locks(struct obd_export *exp);
166 void ldlm_grant_lock_with_skiplist(struct ldlm_lock *lock);
169 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
170 struct ldlm_lock *lock);
171 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns,
172 struct ldlm_lock_desc *ld,
173 struct list_head *cancels, int count,
174 enum ldlm_cancel_flags cancel_flags);
175 int ldlm_bl_to_thread_ns(struct ldlm_namespace *ns);
176 int ldlm_bl_thread_wakeup(void);
178 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
179 struct ldlm_lock_desc *ld, struct ldlm_lock *lock);
180 void ldlm_bl_desc2lock(const struct ldlm_lock_desc *ld, struct ldlm_lock *lock);
182 #ifdef HAVE_SERVER_SUPPORT
184 int ldlm_process_plain_lock(struct ldlm_lock *lock, __u64 *flags,
185 enum ldlm_process_intention intention,
186 enum ldlm_error *err, struct list_head *work_list);
188 /* ldlm_inodebits.c */
189 int ldlm_process_inodebits_lock(struct ldlm_lock *lock, __u64 *flags,
190 enum ldlm_process_intention intention,
191 enum ldlm_error *err,
192 struct list_head *work_list);
193 int ldlm_reprocess_inodebits_queue(struct ldlm_resource *res,
194 struct list_head *queue,
195 struct list_head *work_list,
196 enum ldlm_process_intention intention,
199 int ldlm_process_extent_lock(struct ldlm_lock *lock, __u64 *flags,
200 enum ldlm_process_intention intention,
201 enum ldlm_error *err, struct list_head *work_list);
203 int ldlm_extent_alloc_lock(struct ldlm_lock *lock);
204 void ldlm_extent_add_lock(struct ldlm_resource *res, struct ldlm_lock *lock);
205 void ldlm_extent_unlink_lock(struct ldlm_lock *lock);
207 int ldlm_inodebits_alloc_lock(struct ldlm_lock *lock);
208 void ldlm_inodebits_add_lock(struct ldlm_resource *res, struct list_head *head,
209 struct ldlm_lock *lock, bool tail);
210 void ldlm_inodebits_unlink_lock(struct ldlm_lock *lock);
213 int ldlm_process_flock_lock(struct ldlm_lock *req, __u64 *flags,
214 enum ldlm_process_intention intention,
215 enum ldlm_error *err, struct list_head *work_list);
216 int ldlm_init_flock_export(struct obd_export *exp);
217 void ldlm_destroy_flock_export(struct obd_export *exp);
220 void l_check_ns_lock(struct ldlm_namespace *ns);
221 void l_check_no_ns_lock(struct ldlm_namespace *ns);
223 extern struct dentry *ldlm_svc_debugfs_dir;
226 struct ptlrpc_service *ldlm_cb_service;
227 struct ptlrpc_service *ldlm_cancel_service;
228 struct ptlrpc_client *ldlm_client;
229 struct ldlm_bl_pool *ldlm_bl_pool;
232 /* interval tree, for LDLM_EXTENT. */
233 extern struct kmem_cache *ldlm_interval_slab; /* slab cache for ldlm_interval */
234 extern void ldlm_interval_attach(struct ldlm_interval *n, struct ldlm_lock *l);
235 extern struct ldlm_interval *ldlm_interval_detach(struct ldlm_lock *l);
236 extern void ldlm_interval_free(struct ldlm_interval *node);
237 /* this function must be called with res lock held */
238 static inline struct ldlm_extent *
239 ldlm_interval_extent(struct ldlm_interval *node)
241 struct ldlm_lock *lock;
242 LASSERT(!list_empty(&node->li_group));
244 lock = list_first_entry(&node->li_group, struct ldlm_lock,
246 return &lock->l_policy_data.l_extent;
250 void ldlm_exit(void);
252 enum ldlm_policy_res {
253 LDLM_POLICY_CANCEL_LOCK,
254 LDLM_POLICY_KEEP_LOCK,
255 LDLM_POLICY_SKIP_LOCK
258 #define LDLM_POOL_SYSFS_PRINT_int(v) sprintf(buf, "%d\n", v)
259 #define LDLM_POOL_SYSFS_SET_int(a, b) { a = b; }
260 #define LDLM_POOL_SYSFS_PRINT_u64(v) sprintf(buf, "%lld\n", v)
261 #define LDLM_POOL_SYSFS_SET_u64(a, b) { a = b; }
262 #define LDLM_POOL_SYSFS_PRINT_atomic(v) sprintf(buf, "%d\n", atomic_read(&v))
263 #define LDLM_POOL_SYSFS_SET_atomic(a, b) atomic_set(&a, b)
265 #define LDLM_POOL_SYSFS_READER_SHOW(var, type) \
266 static ssize_t var##_show(struct kobject *kobj, \
267 struct attribute *attr, \
270 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
274 spin_lock(&pl->pl_lock); \
275 tmp = pl->pl_##var; \
276 spin_unlock(&pl->pl_lock); \
278 return LDLM_POOL_SYSFS_PRINT_##type(tmp); \
280 struct __##var##__dummy_read {;} /* semicolon catcher */
282 #define LDLM_POOL_SYSFS_WRITER_STORE(var, type) \
283 static ssize_t var##_store(struct kobject *kobj, \
284 struct attribute *attr, \
285 const char *buffer, \
288 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
293 rc = kstrtoul(buffer, 10, &tmp); \
298 spin_lock(&pl->pl_lock); \
299 LDLM_POOL_SYSFS_SET_##type(pl->pl_##var, tmp); \
300 spin_unlock(&pl->pl_lock); \
304 struct __##var##__dummy_write {; } /* semicolon catcher */
306 #define LDLM_POOL_SYSFS_READER_NOLOCK_SHOW(var, type) \
307 static ssize_t var##_show(struct kobject *kobj, \
308 struct attribute *attr, \
311 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
314 return LDLM_POOL_SYSFS_PRINT_##type(pl->pl_##var); \
316 struct __##var##__dummy_read {; } /* semicolon catcher */
318 #define LDLM_POOL_SYSFS_WRITER_NOLOCK_STORE(var, type) \
319 static ssize_t var##_store(struct kobject *kobj, \
320 struct attribute *attr, \
321 const char *buffer, \
324 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
329 rc = kstrtoul(buffer, 10, &tmp); \
334 LDLM_POOL_SYSFS_SET_##type(pl->pl_##var, tmp); \
338 struct __##var##__dummy_write {; } /* semicolon catcher */
341 ldlm_add_var(struct ldebugfs_vars *vars, struct dentry *debugfs_entry,
342 const char *name, void *data, const struct file_operations *ops)
347 ldebugfs_add_vars(debugfs_entry, vars, NULL);
350 static inline int is_granted_or_cancelled(struct ldlm_lock *lock)
354 lock_res_and_lock(lock);
355 ret = is_granted_or_cancelled_nolock(lock);
356 unlock_res_and_lock(lock);
361 static inline bool is_bl_done(struct ldlm_lock *lock)
365 if (!ldlm_is_bl_done(lock)) {
366 lock_res_and_lock(lock);
367 bl_done = ldlm_is_bl_done(lock);
368 unlock_res_and_lock(lock);
374 static inline bool is_lock_converted(struct ldlm_lock *lock)
378 lock_res_and_lock(lock);
379 ret = (lock->l_policy_data.l_inodebits.cancel_bits == 0);
380 unlock_res_and_lock(lock);
385 typedef void (*ldlm_policy_wire_to_local_t)(const union ldlm_wire_policy_data *,
386 union ldlm_policy_data *);
387 typedef void (*ldlm_policy_local_to_wire_t)(const union ldlm_policy_data *,
388 union ldlm_wire_policy_data *);
389 void ldlm_plain_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
390 union ldlm_policy_data *lpolicy);
391 void ldlm_plain_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
392 union ldlm_wire_policy_data *wpolicy);
393 void ldlm_ibits_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
394 union ldlm_policy_data *lpolicy);
395 void ldlm_ibits_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
396 union ldlm_wire_policy_data *wpolicy);
397 void ldlm_extent_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
398 union ldlm_policy_data *lpolicy);
399 void ldlm_extent_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
400 union ldlm_wire_policy_data *wpolicy);
401 void ldlm_flock_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
402 union ldlm_policy_data *lpolicy);
403 void ldlm_flock_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
404 union ldlm_wire_policy_data *wpolicy);
407 #ifdef HAVE_SERVER_SUPPORT
408 extern __u64 ldlm_reclaim_threshold;
409 extern __u64 ldlm_lock_limit;
410 extern __u64 ldlm_reclaim_threshold_mb;
411 extern __u64 ldlm_lock_limit_mb;
412 extern struct percpu_counter ldlm_granted_total;
414 int ldlm_reclaim_setup(void);
415 void ldlm_reclaim_cleanup(void);
416 void ldlm_reclaim_add(struct ldlm_lock *lock);
417 void ldlm_reclaim_del(struct ldlm_lock *lock);
418 bool ldlm_reclaim_full(void);
420 static inline bool ldlm_res_eq(const struct ldlm_res_id *res0,
421 const struct ldlm_res_id *res1)
423 return memcmp(res0, res1, sizeof(*res0)) == 0;