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 #define MAX_STRING_SIZE 128
35 extern int ldlm_srv_namespace_nr;
36 extern int ldlm_cli_namespace_nr;
37 extern struct mutex ldlm_srv_namespace_lock;
38 extern struct list_head ldlm_srv_namespace_list;
39 extern struct mutex ldlm_cli_namespace_lock;
40 extern struct list_head ldlm_cli_active_namespace_list;
41 extern struct list_head ldlm_cli_inactive_namespace_list;
42 extern unsigned int ldlm_cancel_unused_locks_before_replay;
43 extern struct kmem_cache *ldlm_glimpse_work_kmem;
45 static inline int ldlm_namespace_nr_read(enum ldlm_side client)
47 return client == LDLM_NAMESPACE_SERVER ?
48 ldlm_srv_namespace_nr : ldlm_cli_namespace_nr;
51 static inline void ldlm_namespace_nr_inc(enum ldlm_side client)
53 if (client == LDLM_NAMESPACE_SERVER)
54 ldlm_srv_namespace_nr++;
56 ldlm_cli_namespace_nr++;
59 static inline void ldlm_namespace_nr_dec(enum ldlm_side client)
61 if (client == LDLM_NAMESPACE_SERVER)
62 ldlm_srv_namespace_nr--;
64 ldlm_cli_namespace_nr--;
67 static inline struct list_head *ldlm_namespace_list(enum ldlm_side client)
69 return client == LDLM_NAMESPACE_SERVER ?
70 &ldlm_srv_namespace_list : &ldlm_cli_active_namespace_list;
74 struct list_head *ldlm_namespace_inactive_list(enum ldlm_side client)
76 return client == LDLM_NAMESPACE_SERVER ?
77 &ldlm_srv_namespace_list : &ldlm_cli_inactive_namespace_list;
80 static inline struct mutex *ldlm_namespace_lock(enum ldlm_side client)
82 return client == LDLM_NAMESPACE_SERVER ?
83 &ldlm_srv_namespace_lock : &ldlm_cli_namespace_lock;
86 /* ns_bref is the number of resources in this namespace */
87 static inline int ldlm_ns_empty(struct ldlm_namespace *ns)
89 return atomic_read(&ns->ns_bref) == 0;
92 void ldlm_namespace_move_to_active_locked(struct ldlm_namespace *,
94 void ldlm_namespace_move_to_inactive_locked(struct ldlm_namespace *,
96 struct ldlm_namespace *ldlm_namespace_first_locked(enum ldlm_side);
99 /* Cancel lru flag, it indicates we cancel aged locks. */
100 enum ldlm_lru_flags {
101 LDLM_LRU_FLAG_AGED = 0x01, /* Cancel aged locks (non LRU resize) */
102 LDLM_LRU_FLAG_PASSED = 0x02, /* Cancel passed number of locks */
103 LDLM_LRU_FLAG_SHRINK = 0x04, /* Cancel locks from shrinker */
104 LDLM_LRU_FLAG_LRUR = 0x08, /* Cancel locks from lru resize */
105 LDLM_LRU_FLAG_NO_WAIT = 0x10, /* Cancel locks w/o blocking (neither
106 * sending nor waiting for any RPCs) */
107 LDLM_LRU_FLAG_CLEANUP = 0x20, /* Used when clearing lru, tells
108 * prepare_lru_list to set discard flag
109 * on PR extent locks so we don't waste
110 * time saving pages that will be
111 * discarded momentarily */
114 int ldlm_cancel_lru(struct ldlm_namespace *ns, int nr,
115 enum ldlm_cancel_flags cancel_flags,
116 enum ldlm_lru_flags lru_flags);
117 int ldlm_cancel_lru_local(struct ldlm_namespace *ns,
118 struct list_head *cancels, int count, int max,
119 enum ldlm_cancel_flags cancel_flags,
120 enum ldlm_lru_flags lru_flags);
121 extern unsigned int ldlm_enqueue_min;
122 /* ldlm_resource.c */
123 extern struct kmem_cache *ldlm_resource_slab;
124 extern struct kmem_cache *ldlm_lock_slab;
125 extern struct kmem_cache *ldlm_interval_tree_slab;
127 void ldlm_resource_insert_lock_after(struct ldlm_lock *original,
128 struct ldlm_lock *new);
135 LDLM_WORK_REVOKE_AST,
139 void ldlm_grant_lock_with_skiplist(struct ldlm_lock *lock);
140 void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list);
141 int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
142 enum req_location loc, void *data, int size);
144 ldlm_lock_create(struct ldlm_namespace *ns, const struct ldlm_res_id *,
145 enum ldlm_type type, enum ldlm_mode mode,
146 const struct ldlm_callback_suite *cbs,
147 void *data, __u32 lvb_len, enum lvb_type lvb_type);
148 enum ldlm_error ldlm_lock_enqueue(const struct lu_env *env,
149 struct ldlm_namespace *,
151 void *cookie, __u64 *flags);
152 void ldlm_lock_addref_internal(struct ldlm_lock *, enum ldlm_mode mode);
153 void ldlm_lock_addref_internal_nolock(struct ldlm_lock *, enum ldlm_mode mode);
154 void ldlm_lock_decref_internal(struct ldlm_lock *, enum ldlm_mode mode);
155 void ldlm_lock_decref_internal_nolock(struct ldlm_lock *, enum ldlm_mode mode);
156 void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
157 struct list_head *work_list);
158 #ifdef HAVE_SERVER_SUPPORT
159 int ldlm_reprocess_queue(struct ldlm_resource *res, struct list_head *queue,
160 struct list_head *work_list,
161 enum ldlm_process_intention intention);
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);
196 #ifdef HAVE_SERVER_SUPPORT
198 int ldlm_process_plain_lock(struct ldlm_lock *lock, __u64 *flags,
199 enum ldlm_process_intention intention,
200 enum ldlm_error *err, struct list_head *work_list);
202 /* ldlm_inodebits.c */
203 int ldlm_process_inodebits_lock(struct ldlm_lock *lock, __u64 *flags,
204 enum ldlm_process_intention intention,
205 enum ldlm_error *err,
206 struct list_head *work_list);
208 int ldlm_process_extent_lock(struct ldlm_lock *lock, __u64 *flags,
209 enum ldlm_process_intention intention,
210 enum ldlm_error *err, struct list_head *work_list);
212 void ldlm_extent_add_lock(struct ldlm_resource *res, struct ldlm_lock *lock);
213 void ldlm_extent_unlink_lock(struct ldlm_lock *lock);
216 int ldlm_process_flock_lock(struct ldlm_lock *req, __u64 *flags,
217 enum ldlm_process_intention intention,
218 enum ldlm_error *err, struct list_head *work_list);
219 int ldlm_init_flock_export(struct obd_export *exp);
220 void ldlm_destroy_flock_export(struct obd_export *exp);
223 void l_check_ns_lock(struct ldlm_namespace *ns);
224 void l_check_no_ns_lock(struct ldlm_namespace *ns);
226 extern struct dentry *ldlm_svc_debugfs_dir;
229 struct ptlrpc_service *ldlm_cb_service;
230 struct ptlrpc_service *ldlm_cancel_service;
231 struct ptlrpc_client *ldlm_client;
232 struct ptlrpc_connection *ldlm_server_conn;
233 struct ldlm_bl_pool *ldlm_bl_pool;
236 /* interval tree, for LDLM_EXTENT. */
237 extern struct kmem_cache *ldlm_interval_slab; /* slab cache for ldlm_interval */
238 extern void ldlm_interval_attach(struct ldlm_interval *n, struct ldlm_lock *l);
239 extern struct ldlm_interval *ldlm_interval_detach(struct ldlm_lock *l);
240 extern struct ldlm_interval *ldlm_interval_alloc(struct ldlm_lock *lock);
241 extern void ldlm_interval_free(struct ldlm_interval *node);
242 /* this function must be called with res lock held */
243 static inline struct ldlm_extent *
244 ldlm_interval_extent(struct ldlm_interval *node)
246 struct ldlm_lock *lock;
247 LASSERT(!list_empty(&node->li_group));
249 lock = list_entry(node->li_group.next, struct ldlm_lock,
251 return &lock->l_policy_data.l_extent;
255 void ldlm_exit(void);
257 enum ldlm_policy_res {
258 LDLM_POLICY_CANCEL_LOCK,
259 LDLM_POLICY_KEEP_LOCK,
260 LDLM_POLICY_SKIP_LOCK
263 #define LDLM_POOL_SYSFS_PRINT_int(v) sprintf(buf, "%d\n", v)
264 #define LDLM_POOL_SYSFS_SET_int(a, b) { a = b; }
265 #define LDLM_POOL_SYSFS_PRINT_u64(v) sprintf(buf, "%lld\n", v)
266 #define LDLM_POOL_SYSFS_SET_u64(a, b) { a = b; }
267 #define LDLM_POOL_SYSFS_PRINT_atomic(v) sprintf(buf, "%d\n", atomic_read(&v))
268 #define LDLM_POOL_SYSFS_SET_atomic(a, b) atomic_set(&a, b)
270 #define LDLM_POOL_SYSFS_READER_SHOW(var, type) \
271 static ssize_t var##_show(struct kobject *kobj, \
272 struct attribute *attr, \
275 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
279 spin_lock(&pl->pl_lock); \
280 tmp = pl->pl_##var; \
281 spin_unlock(&pl->pl_lock); \
283 return LDLM_POOL_SYSFS_PRINT_##type(tmp); \
285 struct __##var##__dummy_read {;} /* semicolon catcher */
287 #define LDLM_POOL_SYSFS_WRITER_STORE(var, type) \
288 static ssize_t var##_store(struct kobject *kobj, \
289 struct attribute *attr, \
290 const char *buffer, \
293 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
298 rc = kstrtoul(buffer, 10, &tmp); \
303 spin_lock(&pl->pl_lock); \
304 LDLM_POOL_SYSFS_SET_##type(pl->pl_##var, tmp); \
305 spin_unlock(&pl->pl_lock); \
309 struct __##var##__dummy_write {; } /* semicolon catcher */
311 #define LDLM_POOL_SYSFS_READER_NOLOCK_SHOW(var, type) \
312 static ssize_t var##_show(struct kobject *kobj, \
313 struct attribute *attr, \
316 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
319 return LDLM_POOL_SYSFS_PRINT_##type(pl->pl_##var); \
321 struct __##var##__dummy_read {; } /* semicolon catcher */
323 #define LDLM_POOL_SYSFS_WRITER_NOLOCK_STORE(var, type) \
324 static ssize_t var##_store(struct kobject *kobj, \
325 struct attribute *attr, \
326 const char *buffer, \
329 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
334 rc = kstrtoul(buffer, 10, &tmp); \
339 LDLM_POOL_SYSFS_SET_##type(pl->pl_##var, tmp); \
343 struct __##var##__dummy_write {; } /* semicolon catcher */
346 ldlm_add_var(struct lprocfs_vars *vars, struct dentry *debugfs_entry,
347 const char *name, void *data, const struct file_operations *ops)
349 snprintf((char *)vars->name, MAX_STRING_SIZE, "%s", name);
352 ldebugfs_add_vars(debugfs_entry, vars, NULL);
355 static inline int is_granted_or_cancelled(struct ldlm_lock *lock)
359 lock_res_and_lock(lock);
360 if ((lock->l_req_mode == lock->l_granted_mode) &&
361 !ldlm_is_cp_reqd(lock))
363 else if (ldlm_is_failed(lock) || ldlm_is_cancel(lock))
365 unlock_res_and_lock(lock);
370 static inline bool is_bl_done(struct ldlm_lock *lock)
374 if (!ldlm_is_bl_done(lock)) {
375 lock_res_and_lock(lock);
376 bl_done = ldlm_is_bl_done(lock);
377 unlock_res_and_lock(lock);
383 typedef void (*ldlm_policy_wire_to_local_t)(const union ldlm_wire_policy_data *,
384 union ldlm_policy_data *);
385 typedef void (*ldlm_policy_local_to_wire_t)(const union ldlm_policy_data *,
386 union ldlm_wire_policy_data *);
387 void ldlm_plain_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
388 union ldlm_policy_data *lpolicy);
389 void ldlm_plain_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
390 union ldlm_wire_policy_data *wpolicy);
391 void ldlm_ibits_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
392 union ldlm_policy_data *lpolicy);
393 void ldlm_ibits_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
394 union ldlm_wire_policy_data *wpolicy);
395 void ldlm_extent_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
396 union ldlm_policy_data *lpolicy);
397 void ldlm_extent_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
398 union ldlm_wire_policy_data *wpolicy);
399 void ldlm_flock_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
400 union ldlm_policy_data *lpolicy);
401 void ldlm_flock_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
402 union ldlm_wire_policy_data *wpolicy);
405 #ifdef HAVE_SERVER_SUPPORT
406 extern __u64 ldlm_reclaim_threshold;
407 extern __u64 ldlm_lock_limit;
408 extern __u64 ldlm_reclaim_threshold_mb;
409 extern __u64 ldlm_lock_limit_mb;
410 extern struct percpu_counter ldlm_granted_total;
412 int ldlm_reclaim_setup(void);
413 void ldlm_reclaim_cleanup(void);
414 void ldlm_reclaim_add(struct ldlm_lock *lock);
415 void ldlm_reclaim_del(struct ldlm_lock *lock);
416 bool ldlm_reclaim_full(void);
418 static inline bool ldlm_res_eq(const struct ldlm_res_id *res0,
419 const struct ldlm_res_id *res1)
421 return memcmp(res0, res1, sizeof(*res0)) == 0;