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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;
46 static inline int ldlm_namespace_nr_read(ldlm_side_t client)
48 return client == LDLM_NAMESPACE_SERVER ?
49 ldlm_srv_namespace_nr : ldlm_cli_namespace_nr;
52 static inline void ldlm_namespace_nr_inc(ldlm_side_t client)
54 if (client == LDLM_NAMESPACE_SERVER)
55 ldlm_srv_namespace_nr++;
57 ldlm_cli_namespace_nr++;
60 static inline void ldlm_namespace_nr_dec(ldlm_side_t client)
62 if (client == LDLM_NAMESPACE_SERVER)
63 ldlm_srv_namespace_nr--;
65 ldlm_cli_namespace_nr--;
68 static inline struct list_head *ldlm_namespace_list(ldlm_side_t client)
70 return client == LDLM_NAMESPACE_SERVER ?
71 &ldlm_srv_namespace_list : &ldlm_cli_active_namespace_list;
74 static inline struct mutex *ldlm_namespace_lock(ldlm_side_t client)
76 return client == LDLM_NAMESPACE_SERVER ?
77 &ldlm_srv_namespace_lock : &ldlm_cli_namespace_lock;
80 /* ns_bref is the number of resources in this namespace */
81 static inline int ldlm_ns_empty(struct ldlm_namespace *ns)
83 return atomic_read(&ns->ns_bref) == 0;
86 void ldlm_namespace_move_to_active_locked(struct ldlm_namespace *, ldlm_side_t);
87 void ldlm_namespace_move_to_inactive_locked(struct ldlm_namespace *,
89 struct ldlm_namespace *ldlm_namespace_first_locked(ldlm_side_t);
92 /* Cancel lru flag, it indicates we cancel aged locks. */
94 LDLM_CANCEL_AGED = 1 << 0, /* Cancel aged locks (non lru resize). */
95 LDLM_CANCEL_PASSED = 1 << 1, /* Cancel passed number of locks. */
96 LDLM_CANCEL_SHRINK = 1 << 2, /* Cancel locks from shrinker. */
97 LDLM_CANCEL_LRUR = 1 << 3, /* Cancel locks from lru resize. */
98 LDLM_CANCEL_NO_WAIT = 1 << 4 /* Cancel locks w/o blocking (neither
99 * sending nor waiting for any rpcs)
103 int ldlm_cancel_lru(struct ldlm_namespace *ns, int nr,
104 enum ldlm_cancel_flags sync, int flags);
105 int ldlm_cancel_lru_local(struct ldlm_namespace *ns,
106 struct list_head *cancels, int count, int max,
107 enum ldlm_cancel_flags cancel_flags, int flags);
108 extern int ldlm_enqueue_min;
110 /* ldlm_resource.c */
111 int ldlm_resource_putref_locked(struct ldlm_resource *res);
112 void ldlm_namespace_free_prior(struct ldlm_namespace *ns,
113 struct obd_import *imp, int force);
114 void ldlm_namespace_free_post(struct ldlm_namespace *ns);
117 struct ldlm_cb_set_arg {
118 struct ptlrpc_request_set *set;
119 int type; /* LDLM_{CP,BL,GL}_CALLBACK */
121 struct list_head *list;
122 union ldlm_gl_desc *gl_desc; /* glimpse AST descriptor */
125 enum ldlm_desc_ast_t {
128 LDLM_WORK_REVOKE_AST,
132 void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list);
133 int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
134 enum req_location loc, void *data, int size);
136 ldlm_lock_create(struct ldlm_namespace *ns, const struct ldlm_res_id *,
137 enum ldlm_type type, enum ldlm_mode mode,
138 const struct ldlm_callback_suite *cbs,
139 void *data, __u32 lvb_len, enum lvb_type lvb_type);
140 enum ldlm_error ldlm_lock_enqueue(struct ldlm_namespace *, struct ldlm_lock **,
141 void *cookie, __u64 *flags);
142 void ldlm_lock_addref_internal(struct ldlm_lock *, __u32 mode);
143 void ldlm_lock_addref_internal_nolock(struct ldlm_lock *, __u32 mode);
144 void ldlm_lock_decref_internal(struct ldlm_lock *, __u32 mode);
145 void ldlm_lock_decref_internal_nolock(struct ldlm_lock *, __u32 mode);
146 int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list,
147 enum ldlm_desc_ast_t ast_type);
148 int ldlm_lock_remove_from_lru(struct ldlm_lock *lock);
149 int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock);
150 void ldlm_lock_destroy_nolock(struct ldlm_lock *lock);
153 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
154 struct ldlm_lock *lock);
155 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns,
156 struct ldlm_lock_desc *ld,
157 struct list_head *cancels, int count,
158 enum ldlm_cancel_flags cancel_flags);
160 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
161 struct ldlm_lock_desc *ld, struct ldlm_lock *lock);
163 extern struct kmem_cache *ldlm_resource_slab;
164 extern struct kset *ldlm_ns_kset;
166 /* ldlm_lockd.c & ldlm_lock.c */
167 extern struct kmem_cache *ldlm_lock_slab;
170 void ldlm_extent_add_lock(struct ldlm_resource *res, struct ldlm_lock *lock);
171 void ldlm_extent_unlink_lock(struct ldlm_lock *lock);
174 void l_check_ns_lock(struct ldlm_namespace *ns);
175 void l_check_no_ns_lock(struct ldlm_namespace *ns);
177 extern struct dentry *ldlm_svc_debugfs_dir;
180 struct ptlrpc_service *ldlm_cb_service;
181 struct ptlrpc_service *ldlm_cancel_service;
182 struct ptlrpc_client *ldlm_client;
183 struct ptlrpc_connection *ldlm_server_conn;
184 struct ldlm_bl_pool *ldlm_bl_pool;
188 __u64 ldlm_pool_get_slv(struct ldlm_pool *pl);
189 void ldlm_pool_set_clv(struct ldlm_pool *pl, __u64 clv);
190 __u32 ldlm_pool_get_lvf(struct ldlm_pool *pl);
192 /* interval tree, for LDLM_EXTENT. */
193 extern struct kmem_cache *ldlm_interval_slab; /* slab cache for ldlm_interval */
194 struct ldlm_interval *ldlm_interval_detach(struct ldlm_lock *l);
195 struct ldlm_interval *ldlm_interval_alloc(struct ldlm_lock *lock);
196 void ldlm_interval_free(struct ldlm_interval *node);
197 /* this function must be called with res lock held */
198 static inline struct ldlm_extent *
199 ldlm_interval_extent(struct ldlm_interval *node)
201 struct ldlm_lock *lock;
203 LASSERT(!list_empty(&node->li_group));
205 lock = list_entry(node->li_group.next, struct ldlm_lock,
207 return &lock->l_policy_data.l_extent;
211 void ldlm_exit(void);
213 enum ldlm_policy_res {
214 LDLM_POLICY_CANCEL_LOCK,
215 LDLM_POLICY_KEEP_LOCK,
216 LDLM_POLICY_SKIP_LOCK
219 typedef enum ldlm_policy_res ldlm_policy_res_t;
221 #define LDLM_POOL_SYSFS_PRINT_int(v) sprintf(buf, "%d\n", v)
222 #define LDLM_POOL_SYSFS_SET_int(a, b) { a = b; }
223 #define LDLM_POOL_SYSFS_PRINT_u64(v) sprintf(buf, "%lld\n", v)
224 #define LDLM_POOL_SYSFS_SET_u64(a, b) { a = b; }
225 #define LDLM_POOL_SYSFS_PRINT_atomic(v) sprintf(buf, "%d\n", atomic_read(&v))
226 #define LDLM_POOL_SYSFS_SET_atomic(a, b) atomic_set(&a, b)
228 #define LDLM_POOL_SYSFS_READER_SHOW(var, type) \
229 static ssize_t var##_show(struct kobject *kobj, \
230 struct attribute *attr, \
233 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool, \
237 spin_lock(&pl->pl_lock); \
238 tmp = pl->pl_##var; \
239 spin_unlock(&pl->pl_lock); \
241 return LDLM_POOL_SYSFS_PRINT_##type(tmp); \
243 struct __##var##__dummy_read {; } /* semicolon catcher */
245 #define LDLM_POOL_SYSFS_WRITER_STORE(var, type) \
246 static ssize_t var##_store(struct kobject *kobj, \
247 struct attribute *attr, \
248 const char *buffer, \
251 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool, \
256 rc = kstrtoul(buffer, 10, &tmp); \
261 spin_lock(&pl->pl_lock); \
262 LDLM_POOL_SYSFS_SET_##type(pl->pl_##var, tmp); \
263 spin_unlock(&pl->pl_lock); \
267 struct __##var##__dummy_write {; } /* semicolon catcher */
269 #define LDLM_POOL_SYSFS_READER_NOLOCK_SHOW(var, type) \
270 static ssize_t var##_show(struct kobject *kobj, \
271 struct attribute *attr, \
274 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool, \
277 return LDLM_POOL_SYSFS_PRINT_##type(pl->pl_##var); \
279 struct __##var##__dummy_read {; } /* semicolon catcher */
281 #define LDLM_POOL_SYSFS_WRITER_NOLOCK_STORE(var, type) \
282 static ssize_t var##_store(struct kobject *kobj, \
283 struct attribute *attr, \
284 const char *buffer, \
287 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool, \
292 rc = kstrtoul(buffer, 10, &tmp); \
297 LDLM_POOL_SYSFS_SET_##type(pl->pl_##var, tmp); \
301 struct __##var##__dummy_write {; } /* semicolon catcher */
303 static inline int is_granted_or_cancelled(struct ldlm_lock *lock)
307 lock_res_and_lock(lock);
308 if (((lock->l_req_mode == lock->l_granted_mode) &&
309 !(lock->l_flags & LDLM_FL_CP_REQD)) ||
310 (lock->l_flags & (LDLM_FL_FAILED | LDLM_FL_CANCEL)))
312 unlock_res_and_lock(lock);
317 typedef void (*ldlm_policy_wire_to_local_t)(const ldlm_wire_policy_data_t *,
318 ldlm_policy_data_t *);
320 typedef void (*ldlm_policy_local_to_wire_t)(const ldlm_policy_data_t *,
321 ldlm_wire_policy_data_t *);
323 void ldlm_plain_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
324 ldlm_policy_data_t *lpolicy);
325 void ldlm_plain_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
326 ldlm_wire_policy_data_t *wpolicy);
327 void ldlm_ibits_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
328 ldlm_policy_data_t *lpolicy);
329 void ldlm_ibits_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
330 ldlm_wire_policy_data_t *wpolicy);
331 void ldlm_extent_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
332 ldlm_policy_data_t *lpolicy);
333 void ldlm_extent_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
334 ldlm_wire_policy_data_t *wpolicy);
335 void ldlm_flock_policy_wire18_to_local(const ldlm_wire_policy_data_t *wpolicy,
336 ldlm_policy_data_t *lpolicy);
337 void ldlm_flock_policy_wire21_to_local(const ldlm_wire_policy_data_t *wpolicy,
338 ldlm_policy_data_t *lpolicy);
340 void ldlm_flock_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
341 ldlm_wire_policy_data_t *wpolicy);