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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30 * Copyright (c) 2011, 2012, 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 cfs_list_t ldlm_srv_namespace_list;
43 extern struct mutex ldlm_cli_namespace_lock;
44 extern cfs_list_t ldlm_cli_active_namespace_list;
45 extern cfs_list_t ldlm_cli_inactive_namespace_list;
47 static inline int ldlm_namespace_nr_read(ldlm_side_t client)
49 return client == LDLM_NAMESPACE_SERVER ?
50 ldlm_srv_namespace_nr : ldlm_cli_namespace_nr;
53 static inline void ldlm_namespace_nr_inc(ldlm_side_t client)
55 if (client == LDLM_NAMESPACE_SERVER)
56 ldlm_srv_namespace_nr++;
58 ldlm_cli_namespace_nr++;
61 static inline void ldlm_namespace_nr_dec(ldlm_side_t client)
63 if (client == LDLM_NAMESPACE_SERVER)
64 ldlm_srv_namespace_nr--;
66 ldlm_cli_namespace_nr--;
69 static inline cfs_list_t *ldlm_namespace_list(ldlm_side_t client)
71 return client == LDLM_NAMESPACE_SERVER ?
72 &ldlm_srv_namespace_list : &ldlm_cli_active_namespace_list;
75 static inline cfs_list_t *ldlm_namespace_inactive_list(ldlm_side_t client)
77 return client == LDLM_NAMESPACE_SERVER ?
78 &ldlm_srv_namespace_list : &ldlm_cli_inactive_namespace_list;
81 static inline struct mutex *ldlm_namespace_lock(ldlm_side_t client)
83 return client == LDLM_NAMESPACE_SERVER ?
84 &ldlm_srv_namespace_lock : &ldlm_cli_namespace_lock;
87 /* ns_bref is the number of resources in this namespace with the notable
88 * exception of quota namespaces which have their empty refcount at 1 */
89 static inline int ldlm_ns_empty(struct ldlm_namespace *ns)
91 return cfs_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 cfs_list_t *cancels, int count, int max,
113 ldlm_cancel_flags_t cancel_flags, int flags);
114 extern int ldlm_enqueue_min;
115 int ldlm_get_enq_timeout(struct ldlm_lock *lock);
117 /* ldlm_resource.c */
118 int ldlm_resource_putref_locked(struct ldlm_resource *res);
119 void ldlm_resource_insert_lock_after(struct ldlm_lock *original,
120 struct ldlm_lock *new);
121 void ldlm_namespace_free_prior(struct ldlm_namespace *ns,
122 struct obd_import *imp, int force);
123 void ldlm_namespace_free_post(struct ldlm_namespace *ns);
126 struct ldlm_cb_set_arg {
127 struct ptlrpc_request_set *set;
128 int type; /* LDLM_{CP,BL,GL}_CALLBACK */
129 cfs_atomic_t restart;
131 union ldlm_gl_desc *gl_desc; /* glimpse AST descriptor */
137 LDLM_WORK_REVOKE_AST,
141 void ldlm_grant_lock(struct ldlm_lock *lock, cfs_list_t *work_list);
142 int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
143 enum req_location loc, void *data, int size);
145 ldlm_lock_create(struct ldlm_namespace *ns, const struct ldlm_res_id *,
146 ldlm_type_t type, ldlm_mode_t,
147 const struct ldlm_callback_suite *cbs,
148 void *data, __u32 lvb_len, enum lvb_type lvb_type);
149 ldlm_error_t ldlm_lock_enqueue(struct ldlm_namespace *, struct ldlm_lock **,
150 void *cookie, __u64 *flags);
151 void ldlm_lock_addref_internal(struct ldlm_lock *, __u32 mode);
152 void ldlm_lock_addref_internal_nolock(struct ldlm_lock *, __u32 mode);
153 void ldlm_lock_decref_internal(struct ldlm_lock *, __u32 mode);
154 void ldlm_lock_decref_internal_nolock(struct ldlm_lock *, __u32 mode);
155 void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
156 cfs_list_t *work_list);
157 #ifdef HAVE_SERVER_SUPPORT
158 int ldlm_reprocess_queue(struct ldlm_resource *res, cfs_list_t *queue,
159 cfs_list_t *work_list);
161 int ldlm_run_ast_work(struct ldlm_namespace *ns, cfs_list_t *rpc_list,
162 ldlm_desc_ast_t ast_type);
163 int ldlm_work_gl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq);
164 int ldlm_lock_remove_from_lru(struct ldlm_lock *lock);
165 int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock);
166 void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock);
167 void ldlm_lock_add_to_lru(struct ldlm_lock *lock);
168 void ldlm_lock_touch_in_lru(struct ldlm_lock *lock);
169 void ldlm_lock_destroy_nolock(struct ldlm_lock *lock);
171 void ldlm_cancel_locks_for_export(struct obd_export *export);
174 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
175 struct ldlm_lock *lock);
176 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns,
177 struct ldlm_lock_desc *ld,
178 cfs_list_t *cancels, int count,
179 ldlm_cancel_flags_t cancel_flags);
181 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
182 struct ldlm_lock_desc *ld, struct ldlm_lock *lock);
184 #ifdef HAVE_SERVER_SUPPORT
186 int ldlm_process_plain_lock(struct ldlm_lock *lock, __u64 *flags,
187 int first_enq, ldlm_error_t *err,
188 cfs_list_t *work_list);
190 /* ldlm_inodebits.c */
191 int ldlm_process_inodebits_lock(struct ldlm_lock *lock, __u64 *flags,
192 int first_enq, ldlm_error_t *err,
193 cfs_list_t *work_list);
197 #ifdef HAVE_SERVER_SUPPORT
198 int ldlm_process_extent_lock(struct ldlm_lock *lock, __u64 *flags,
199 int first_enq, ldlm_error_t *err,
200 cfs_list_t *work_list);
202 void ldlm_extent_add_lock(struct ldlm_resource *res, struct ldlm_lock *lock);
203 void ldlm_extent_unlink_lock(struct ldlm_lock *lock);
206 int ldlm_process_flock_lock(struct ldlm_lock *req, __u64 *flags,
207 int first_enq, ldlm_error_t *err,
208 cfs_list_t *work_list);
209 int ldlm_init_flock_export(struct obd_export *exp);
210 void ldlm_destroy_flock_export(struct obd_export *exp);
213 void l_check_ns_lock(struct ldlm_namespace *ns);
214 void l_check_no_ns_lock(struct ldlm_namespace *ns);
216 extern cfs_proc_dir_entry_t *ldlm_svc_proc_dir;
217 extern cfs_proc_dir_entry_t *ldlm_type_proc_dir;
220 struct ptlrpc_service *ldlm_cb_service;
221 struct ptlrpc_service *ldlm_cancel_service;
222 struct ptlrpc_client *ldlm_client;
223 struct ptlrpc_connection *ldlm_server_conn;
224 struct ldlm_bl_pool *ldlm_bl_pool;
227 /* interval tree, for LDLM_EXTENT. */
228 extern cfs_mem_cache_t *ldlm_interval_slab; /* slab cache for ldlm_interval */
229 extern void ldlm_interval_attach(struct ldlm_interval *n, struct ldlm_lock *l);
230 extern struct ldlm_interval *ldlm_interval_detach(struct ldlm_lock *l);
231 extern struct ldlm_interval *ldlm_interval_alloc(struct ldlm_lock *lock);
232 extern void ldlm_interval_free(struct ldlm_interval *node);
233 /* this function must be called with res lock held */
234 static inline struct ldlm_extent *
235 ldlm_interval_extent(struct ldlm_interval *node)
237 struct ldlm_lock *lock;
238 LASSERT(!cfs_list_empty(&node->li_group));
240 lock = cfs_list_entry(node->li_group.next, struct ldlm_lock,
242 return &lock->l_policy_data.l_extent;
246 void ldlm_exit(void);
248 enum ldlm_policy_res {
249 LDLM_POLICY_CANCEL_LOCK,
250 LDLM_POLICY_KEEP_LOCK,
251 LDLM_POLICY_SKIP_LOCK
254 typedef enum ldlm_policy_res ldlm_policy_res_t;
256 #define LDLM_POOL_PROC_READER(var, type) \
257 static int lprocfs_rd_##var(char *page, char **start, off_t off, \
258 int count, int *eof, void *data) \
260 struct ldlm_pool *pl = data; \
263 spin_lock(&pl->pl_lock); \
264 tmp = pl->pl_##var; \
265 spin_unlock(&pl->pl_lock); \
267 return lprocfs_rd_uint(page, start, off, count, eof, &tmp); \
269 struct __##var##__dummy_read {;} /* semicolon catcher */
271 #define LDLM_POOL_PROC_WRITER(var, type) \
272 int lprocfs_wr_##var(struct file *file, const char *buffer, \
273 unsigned long count, void *data) \
275 struct ldlm_pool *pl = data; \
279 rc = lprocfs_wr_uint(file, buffer, count, &tmp); \
281 CERROR("Can't parse user input, rc = %d\n", rc); \
285 spin_lock(&pl->pl_lock); \
286 pl->pl_##var = tmp; \
287 spin_unlock(&pl->pl_lock); \
291 struct __##var##__dummy_write {;} /* semicolon catcher */
293 static inline int is_granted_or_cancelled(struct ldlm_lock *lock)
297 lock_res_and_lock(lock);
298 if (((lock->l_req_mode == lock->l_granted_mode) &&
299 !(lock->l_flags & LDLM_FL_CP_REQD)) ||
300 (lock->l_flags & (LDLM_FL_FAILED | LDLM_FL_CANCEL)))
302 unlock_res_and_lock(lock);
307 typedef void (*ldlm_policy_wire_to_local_t)(const ldlm_wire_policy_data_t *,
308 ldlm_policy_data_t *);
310 typedef void (*ldlm_policy_local_to_wire_t)(const ldlm_policy_data_t *,
311 ldlm_wire_policy_data_t *);
313 void ldlm_plain_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
314 ldlm_policy_data_t *lpolicy);
315 void ldlm_plain_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
316 ldlm_wire_policy_data_t *wpolicy);
317 void ldlm_ibits_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
318 ldlm_policy_data_t *lpolicy);
319 void ldlm_ibits_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
320 ldlm_wire_policy_data_t *wpolicy);
321 void ldlm_extent_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
322 ldlm_policy_data_t *lpolicy);
323 void ldlm_extent_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
324 ldlm_wire_policy_data_t *wpolicy);
325 void ldlm_flock_policy_wire18_to_local(const ldlm_wire_policy_data_t *wpolicy,
326 ldlm_policy_data_t *lpolicy);
327 void ldlm_flock_policy_wire21_to_local(const ldlm_wire_policy_data_t *wpolicy,
328 ldlm_policy_data_t *lpolicy);
330 void ldlm_flock_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
331 ldlm_wire_policy_data_t *wpolicy);