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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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.
28 * Use is subject to license terms.
30 * Copyright (c) 2011, 2013, Intel Corporation.
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(ldlm_side_t client)
50 return client == LDLM_NAMESPACE_SERVER ?
51 ldlm_srv_namespace_nr : ldlm_cli_namespace_nr;
54 static inline void ldlm_namespace_nr_inc(ldlm_side_t 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(ldlm_side_t 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(ldlm_side_t client)
72 return client == LDLM_NAMESPACE_SERVER ?
73 &ldlm_srv_namespace_list : &ldlm_cli_active_namespace_list;
76 static inline struct list_head *ldlm_namespace_inactive_list(ldlm_side_t client)
78 return client == LDLM_NAMESPACE_SERVER ?
79 &ldlm_srv_namespace_list : &ldlm_cli_inactive_namespace_list;
82 static inline struct mutex *ldlm_namespace_lock(ldlm_side_t client)
84 return client == LDLM_NAMESPACE_SERVER ?
85 &ldlm_srv_namespace_lock : &ldlm_cli_namespace_lock;
88 /* ns_bref is the number of resources in this namespace */
89 static inline int ldlm_ns_empty(struct ldlm_namespace *ns)
91 return atomic_read(&ns->ns_bref) == 0;
94 void ldlm_namespace_move_to_active_locked(struct ldlm_namespace *, ldlm_side_t);
95 void ldlm_namespace_move_to_inactive_locked(struct ldlm_namespace *, ldlm_side_t);
96 struct ldlm_namespace *ldlm_namespace_first_locked(ldlm_side_t);
99 /* Cancel lru flag, it indicates we cancel aged locks. */
101 LDLM_CANCEL_AGED = 1 << 0, /* Cancel aged locks (non lru resize). */
102 LDLM_CANCEL_PASSED = 1 << 1, /* Cancel passed number of locks. */
103 LDLM_CANCEL_SHRINK = 1 << 2, /* Cancel locks from shrinker. */
104 LDLM_CANCEL_LRUR = 1 << 3, /* Cancel locks from lru resize. */
105 LDLM_CANCEL_NO_WAIT = 1 << 4 /* Cancel locks w/o blocking (neither
106 * sending nor waiting for any rpcs) */
109 int ldlm_cancel_lru(struct ldlm_namespace *ns, int nr,
110 ldlm_cancel_flags_t sync, int flags);
111 int ldlm_cancel_lru_local(struct ldlm_namespace *ns,
112 struct list_head *cancels, int count, int max,
113 ldlm_cancel_flags_t cancel_flags, int flags);
114 extern unsigned int ldlm_enqueue_min;
115 /* ldlm_resource.c */
116 extern struct kmem_cache *ldlm_resource_slab;
117 extern struct kmem_cache *ldlm_lock_slab;
119 int ldlm_resource_putref_locked(struct ldlm_resource *res);
120 void ldlm_resource_insert_lock_after(struct ldlm_lock *original,
121 struct ldlm_lock *new);
122 void ldlm_namespace_free_prior(struct ldlm_namespace *ns,
123 struct obd_import *imp, int force);
124 void ldlm_namespace_free_post(struct ldlm_namespace *ns);
128 struct ldlm_cb_set_arg {
129 struct ptlrpc_request_set *set;
130 int type; /* LDLM_{CP,BL,GL}_CALLBACK */
132 struct list_head *list;
133 union ldlm_gl_desc *gl_desc; /* glimpse AST descriptor */
139 LDLM_WORK_REVOKE_AST,
143 void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list);
144 int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
145 enum req_location loc, void *data, int size);
147 ldlm_lock_create(struct ldlm_namespace *ns, const struct ldlm_res_id *,
148 ldlm_type_t type, ldlm_mode_t,
149 const struct ldlm_callback_suite *cbs,
150 void *data, __u32 lvb_len, enum lvb_type lvb_type);
151 ldlm_error_t ldlm_lock_enqueue(struct ldlm_namespace *, struct ldlm_lock **,
152 void *cookie, __u64 *flags);
153 void ldlm_lock_addref_internal(struct ldlm_lock *, __u32 mode);
154 void ldlm_lock_addref_internal_nolock(struct ldlm_lock *, __u32 mode);
155 void ldlm_lock_decref_internal(struct ldlm_lock *, __u32 mode);
156 void ldlm_lock_decref_internal_nolock(struct ldlm_lock *, __u32 mode);
157 void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
158 struct list_head *work_list);
159 #ifdef HAVE_SERVER_SUPPORT
160 int ldlm_reprocess_queue(struct ldlm_resource *res, struct list_head *queue,
161 struct list_head *work_list);
163 int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list,
164 ldlm_desc_ast_t ast_type);
165 int ldlm_work_gl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq);
166 int ldlm_lock_remove_from_lru_check(struct ldlm_lock *lock,
167 cfs_time_t last_use);
168 #define ldlm_lock_remove_from_lru(lock) ldlm_lock_remove_from_lru_check(lock, 0)
169 int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock);
170 void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock);
171 void ldlm_lock_add_to_lru(struct ldlm_lock *lock);
172 void ldlm_lock_touch_in_lru(struct ldlm_lock *lock);
173 void ldlm_lock_destroy_nolock(struct ldlm_lock *lock);
175 void ldlm_cancel_locks_for_export(struct obd_export *export);
178 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
179 struct ldlm_lock *lock);
180 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns,
181 struct ldlm_lock_desc *ld,
182 struct list_head *cancels, int count,
183 ldlm_cancel_flags_t cancel_flags);
185 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
186 struct ldlm_lock_desc *ld, struct ldlm_lock *lock);
188 #ifdef HAVE_SERVER_SUPPORT
190 int ldlm_process_plain_lock(struct ldlm_lock *lock, __u64 *flags,
191 int first_enq, ldlm_error_t *err,
192 struct list_head *work_list);
194 /* ldlm_inodebits.c */
195 int ldlm_process_inodebits_lock(struct ldlm_lock *lock, __u64 *flags,
196 int first_enq, ldlm_error_t *err,
197 struct list_head *work_list);
201 #ifdef HAVE_SERVER_SUPPORT
202 int ldlm_process_extent_lock(struct ldlm_lock *lock, __u64 *flags,
203 int first_enq, ldlm_error_t *err,
204 struct list_head *work_list);
206 void ldlm_extent_add_lock(struct ldlm_resource *res, struct ldlm_lock *lock);
207 void ldlm_extent_unlink_lock(struct ldlm_lock *lock);
210 int ldlm_process_flock_lock(struct ldlm_lock *req, __u64 *flags,
211 int first_enq, ldlm_error_t *err,
212 struct list_head *work_list);
213 int ldlm_init_flock_export(struct obd_export *exp);
214 void ldlm_destroy_flock_export(struct obd_export *exp);
217 void l_check_ns_lock(struct ldlm_namespace *ns);
218 void l_check_no_ns_lock(struct ldlm_namespace *ns);
220 extern struct proc_dir_entry *ldlm_svc_proc_dir;
223 struct ptlrpc_service *ldlm_cb_service;
224 struct ptlrpc_service *ldlm_cancel_service;
225 struct ptlrpc_client *ldlm_client;
226 struct ptlrpc_connection *ldlm_server_conn;
227 struct ldlm_bl_pool *ldlm_bl_pool;
230 /* interval tree, for LDLM_EXTENT. */
231 extern struct kmem_cache *ldlm_interval_slab; /* slab cache for ldlm_interval */
232 extern void ldlm_interval_attach(struct ldlm_interval *n, struct ldlm_lock *l);
233 extern struct ldlm_interval *ldlm_interval_detach(struct ldlm_lock *l);
234 extern struct ldlm_interval *ldlm_interval_alloc(struct ldlm_lock *lock);
235 extern void ldlm_interval_free(struct ldlm_interval *node);
236 /* this function must be called with res lock held */
237 static inline struct ldlm_extent *
238 ldlm_interval_extent(struct ldlm_interval *node)
240 struct ldlm_lock *lock;
241 LASSERT(!list_empty(&node->li_group));
243 lock = list_entry(node->li_group.next, struct ldlm_lock,
245 return &lock->l_policy_data.l_extent;
249 void ldlm_exit(void);
251 enum ldlm_policy_res {
252 LDLM_POLICY_CANCEL_LOCK,
253 LDLM_POLICY_KEEP_LOCK,
254 LDLM_POLICY_SKIP_LOCK
257 typedef enum ldlm_policy_res ldlm_policy_res_t;
259 #define LDLM_POOL_PROC_READER_SEQ_SHOW(var, type) \
260 static int lprocfs_##var##_seq_show(struct seq_file *m, void *v)\
262 struct ldlm_pool *pl = m->private; \
265 spin_lock(&pl->pl_lock); \
266 tmp = pl->pl_##var; \
267 spin_unlock(&pl->pl_lock); \
269 return lprocfs_uint_seq_show(m, &tmp); \
271 struct __##var##__dummy_read {;} /* semicolon catcher */
273 #define LDLM_POOL_PROC_WRITER(var, type) \
274 static int lprocfs_wr_##var(struct file *file, \
275 const char __user *buffer, \
276 unsigned long count, void *data) \
278 struct ldlm_pool *pl = data; \
282 rc = lprocfs_wr_uint(file, buffer, count, &tmp); \
284 CERROR("Can't parse user input, rc = %d\n", rc);\
288 spin_lock(&pl->pl_lock); \
289 pl->pl_##var = tmp; \
290 spin_unlock(&pl->pl_lock); \
294 struct __##var##__dummy_write {;} /* semicolon catcher */
297 ldlm_add_var(struct lprocfs_vars *vars, struct proc_dir_entry *proc_dir,
298 const char *name, void *data, const struct file_operations *ops)
300 snprintf((char *)vars->name, MAX_STRING_SIZE, "%s", name);
303 lprocfs_add_vars(proc_dir, vars, NULL);
306 static inline int is_granted_or_cancelled(struct ldlm_lock *lock)
310 lock_res_and_lock(lock);
311 if ((lock->l_req_mode == lock->l_granted_mode) &&
312 !ldlm_is_cp_reqd(lock))
314 else if (ldlm_is_failed(lock) || ldlm_is_cancel(lock))
316 unlock_res_and_lock(lock);
321 typedef void (*ldlm_policy_wire_to_local_t)(const ldlm_wire_policy_data_t *,
322 ldlm_policy_data_t *);
324 typedef void (*ldlm_policy_local_to_wire_t)(const ldlm_policy_data_t *,
325 ldlm_wire_policy_data_t *);
327 void ldlm_plain_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
328 ldlm_policy_data_t *lpolicy);
329 void ldlm_plain_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
330 ldlm_wire_policy_data_t *wpolicy);
331 void ldlm_ibits_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
332 ldlm_policy_data_t *lpolicy);
333 void ldlm_ibits_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
334 ldlm_wire_policy_data_t *wpolicy);
335 void ldlm_extent_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
336 ldlm_policy_data_t *lpolicy);
337 void ldlm_extent_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
338 ldlm_wire_policy_data_t *wpolicy);
339 void ldlm_flock_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
340 ldlm_policy_data_t *lpolicy);
342 void ldlm_flock_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
343 ldlm_wire_policy_data_t *wpolicy);