4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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7 * it under the terms of the GNU General Public License version 2 only,
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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
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33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
37 #define MAX_STRING_SIZE 128
39 extern int ldlm_srv_namespace_nr;
40 extern int ldlm_cli_namespace_nr;
41 extern struct mutex ldlm_srv_namespace_lock;
42 extern struct list_head ldlm_srv_namespace_list;
43 extern struct mutex ldlm_cli_namespace_lock;
44 extern struct list_head ldlm_cli_active_namespace_list;
45 extern struct list_head ldlm_cli_inactive_namespace_list;
46 extern unsigned int ldlm_cancel_unused_locks_before_replay;
48 static inline int ldlm_namespace_nr_read(enum ldlm_side client)
50 return client == LDLM_NAMESPACE_SERVER ?
51 ldlm_srv_namespace_nr : ldlm_cli_namespace_nr;
54 static inline void ldlm_namespace_nr_inc(enum ldlm_side client)
56 if (client == LDLM_NAMESPACE_SERVER)
57 ldlm_srv_namespace_nr++;
59 ldlm_cli_namespace_nr++;
62 static inline void ldlm_namespace_nr_dec(enum ldlm_side client)
64 if (client == LDLM_NAMESPACE_SERVER)
65 ldlm_srv_namespace_nr--;
67 ldlm_cli_namespace_nr--;
70 static inline struct list_head *ldlm_namespace_list(enum ldlm_side client)
72 return client == LDLM_NAMESPACE_SERVER ?
73 &ldlm_srv_namespace_list : &ldlm_cli_active_namespace_list;
77 struct list_head *ldlm_namespace_inactive_list(enum ldlm_side client)
79 return client == LDLM_NAMESPACE_SERVER ?
80 &ldlm_srv_namespace_list : &ldlm_cli_inactive_namespace_list;
83 static inline struct mutex *ldlm_namespace_lock(enum ldlm_side client)
85 return client == LDLM_NAMESPACE_SERVER ?
86 &ldlm_srv_namespace_lock : &ldlm_cli_namespace_lock;
89 /* ns_bref is the number of resources in this namespace */
90 static inline int ldlm_ns_empty(struct ldlm_namespace *ns)
92 return atomic_read(&ns->ns_bref) == 0;
95 void ldlm_namespace_move_to_active_locked(struct ldlm_namespace *,
97 void ldlm_namespace_move_to_inactive_locked(struct ldlm_namespace *,
99 struct ldlm_namespace *ldlm_namespace_first_locked(enum ldlm_side);
102 /* Cancel lru flag, it indicates we cancel aged locks. */
103 enum ldlm_lru_flags {
104 LDLM_LRU_FLAG_AGED = 0x01, /* Cancel aged locks (non LRU resize) */
105 LDLM_LRU_FLAG_PASSED = 0x02, /* Cancel passed number of locks */
106 LDLM_LRU_FLAG_SHRINK = 0x04, /* Cancel locks from shrinker */
107 LDLM_LRU_FLAG_LRUR = 0x08, /* Cancel locks from lru resize */
108 LDLM_LRU_FLAG_NO_WAIT = 0x10, /* Cancel locks w/o blocking (neither
109 * sending nor waiting for any RPCs) */
110 LDLM_LRU_FLAG_LRUR_NO_WAIT = 0x20, /* LRUR + NO_WAIT */
113 int ldlm_cancel_lru(struct ldlm_namespace *ns, int nr,
114 enum ldlm_cancel_flags cancel_flags,
115 enum ldlm_lru_flags lru_flags);
116 int ldlm_cancel_lru_local(struct ldlm_namespace *ns,
117 struct list_head *cancels, int count, int max,
118 enum ldlm_cancel_flags cancel_flags,
119 enum ldlm_lru_flags lru_flags);
120 extern unsigned int ldlm_enqueue_min;
121 /* ldlm_resource.c */
122 extern struct kmem_cache *ldlm_resource_slab;
123 extern struct kmem_cache *ldlm_lock_slab;
124 extern struct kmem_cache *ldlm_interval_tree_slab;
126 int ldlm_resource_putref_locked(struct ldlm_resource *res);
127 void ldlm_resource_insert_lock_after(struct ldlm_lock *original,
128 struct ldlm_lock *new);
132 struct ldlm_cb_set_arg {
133 struct ptlrpc_request_set *set;
134 int type; /* LDLM_{CP,BL,GL}_CALLBACK */
136 struct list_head *list;
137 union ldlm_gl_desc *gl_desc; /* glimpse AST descriptor */
143 LDLM_WORK_REVOKE_AST,
147 void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list);
148 int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
149 enum req_location loc, void *data, int size);
151 ldlm_lock_create(struct ldlm_namespace *ns, const struct ldlm_res_id *,
152 enum ldlm_type type, enum ldlm_mode mode,
153 const struct ldlm_callback_suite *cbs,
154 void *data, __u32 lvb_len, enum lvb_type lvb_type);
155 enum ldlm_error ldlm_lock_enqueue(struct ldlm_namespace *, struct ldlm_lock **,
156 void *cookie, __u64 *flags);
157 void ldlm_lock_addref_internal(struct ldlm_lock *, enum ldlm_mode mode);
158 void ldlm_lock_addref_internal_nolock(struct ldlm_lock *, enum ldlm_mode mode);
159 void ldlm_lock_decref_internal(struct ldlm_lock *, enum ldlm_mode mode);
160 void ldlm_lock_decref_internal_nolock(struct ldlm_lock *, enum ldlm_mode mode);
161 void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
162 struct list_head *work_list);
163 #ifdef HAVE_SERVER_SUPPORT
164 int ldlm_reprocess_queue(struct ldlm_resource *res, struct list_head *queue,
165 struct list_head *work_list);
167 int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list,
168 ldlm_desc_ast_t ast_type);
169 int ldlm_work_gl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq);
170 int ldlm_lock_remove_from_lru_check(struct ldlm_lock *lock,
171 cfs_time_t last_use);
172 #define ldlm_lock_remove_from_lru(lock) ldlm_lock_remove_from_lru_check(lock, 0)
173 int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock);
174 void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock);
175 void ldlm_lock_add_to_lru(struct ldlm_lock *lock);
176 void ldlm_lock_touch_in_lru(struct ldlm_lock *lock);
177 void ldlm_lock_destroy_nolock(struct ldlm_lock *lock);
179 int ldlm_export_cancel_blocked_locks(struct obd_export *exp);
180 int ldlm_export_cancel_locks(struct obd_export *exp);
183 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
184 struct ldlm_lock *lock);
185 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns,
186 struct ldlm_lock_desc *ld,
187 struct list_head *cancels, int count,
188 enum ldlm_cancel_flags cancel_flags);
189 int ldlm_bl_thread_wakeup(void);
191 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
192 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 int first_enq, enum ldlm_error *err,
198 struct list_head *work_list);
200 /* ldlm_inodebits.c */
201 int ldlm_process_inodebits_lock(struct ldlm_lock *lock, __u64 *flags,
202 int first_enq, enum ldlm_error *err,
203 struct list_head *work_list);
207 #ifdef HAVE_SERVER_SUPPORT
208 int ldlm_process_extent_lock(struct ldlm_lock *lock, __u64 *flags,
209 int first_enq, enum ldlm_error *err,
210 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 int first_enq, enum ldlm_error *err,
218 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 proc_dir_entry *ldlm_svc_proc_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_PROC_READER_SEQ_SHOW(var, type) \
264 static int lprocfs_##var##_seq_show(struct seq_file *m, void *v)\
266 struct ldlm_pool *pl = m->private; \
269 spin_lock(&pl->pl_lock); \
270 tmp = pl->pl_##var; \
271 spin_unlock(&pl->pl_lock); \
273 return lprocfs_uint_seq_show(m, &tmp); \
275 struct __##var##__dummy_read {;} /* semicolon catcher */
277 #define LDLM_POOL_PROC_WRITER(var, type) \
278 static int lprocfs_wr_##var(struct file *file, \
279 const char __user *buffer, \
280 unsigned long count, void *data) \
282 struct ldlm_pool *pl = data; \
286 rc = lprocfs_wr_uint(file, buffer, count, &tmp); \
288 CERROR("Can't parse user input, rc = %d\n", rc);\
292 spin_lock(&pl->pl_lock); \
293 pl->pl_##var = tmp; \
294 spin_unlock(&pl->pl_lock); \
298 struct __##var##__dummy_write {;} /* semicolon catcher */
301 ldlm_add_var(struct lprocfs_vars *vars, struct proc_dir_entry *proc_dir,
302 const char *name, void *data, const struct file_operations *ops)
304 snprintf((char *)vars->name, MAX_STRING_SIZE, "%s", name);
307 lprocfs_add_vars(proc_dir, vars, NULL);
310 static inline int is_granted_or_cancelled(struct ldlm_lock *lock)
314 lock_res_and_lock(lock);
315 if ((lock->l_req_mode == lock->l_granted_mode) &&
316 !ldlm_is_cp_reqd(lock))
318 else if (ldlm_is_failed(lock) || ldlm_is_cancel(lock))
320 unlock_res_and_lock(lock);
325 typedef void (*ldlm_policy_wire_to_local_t)(const union ldlm_wire_policy_data *,
326 union ldlm_policy_data *);
327 typedef void (*ldlm_policy_local_to_wire_t)(const union ldlm_policy_data *,
328 union ldlm_wire_policy_data *);
329 void ldlm_plain_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
330 union ldlm_policy_data *lpolicy);
331 void ldlm_plain_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
332 union ldlm_wire_policy_data *wpolicy);
333 void ldlm_ibits_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
334 union ldlm_policy_data *lpolicy);
335 void ldlm_ibits_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
336 union ldlm_wire_policy_data *wpolicy);
337 void ldlm_extent_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
338 union ldlm_policy_data *lpolicy);
339 void ldlm_extent_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
340 union ldlm_wire_policy_data *wpolicy);
341 void ldlm_flock_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
342 union ldlm_policy_data *lpolicy);
343 void ldlm_flock_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
344 union ldlm_wire_policy_data *wpolicy);
347 #ifdef HAVE_SERVER_SUPPORT
348 extern __u64 ldlm_reclaim_threshold;
349 extern __u64 ldlm_lock_limit;
350 extern __u64 ldlm_reclaim_threshold_mb;
351 extern __u64 ldlm_lock_limit_mb;
352 extern struct percpu_counter ldlm_granted_total;
354 int ldlm_reclaim_setup(void);
355 void ldlm_reclaim_cleanup(void);
356 void ldlm_reclaim_add(struct ldlm_lock *lock);
357 void ldlm_reclaim_del(struct ldlm_lock *lock);
358 bool ldlm_reclaim_full(void);