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37#define MAX_STRING_SIZE 128
38
39extern int ldlm_srv_namespace_nr;
40extern int ldlm_cli_namespace_nr;
41extern struct mutex ldlm_srv_namespace_lock;
42extern struct list_head ldlm_srv_namespace_list;
43extern struct mutex ldlm_cli_namespace_lock;
44extern struct list_head ldlm_cli_active_namespace_list;
45extern struct list_head ldlm_cli_inactive_namespace_list;
46
47static inline int ldlm_namespace_nr_read(ldlm_side_t client)
48{
49 return client == LDLM_NAMESPACE_SERVER ?
50 ldlm_srv_namespace_nr : ldlm_cli_namespace_nr;
51}
52
53static inline void ldlm_namespace_nr_inc(ldlm_side_t client)
54{
55 if (client == LDLM_NAMESPACE_SERVER)
56 ldlm_srv_namespace_nr++;
57 else
58 ldlm_cli_namespace_nr++;
59}
60
61static inline void ldlm_namespace_nr_dec(ldlm_side_t client)
62{
63 if (client == LDLM_NAMESPACE_SERVER)
64 ldlm_srv_namespace_nr--;
65 else
66 ldlm_cli_namespace_nr--;
67}
68
69static inline struct list_head *ldlm_namespace_list(ldlm_side_t client)
70{
71 return client == LDLM_NAMESPACE_SERVER ?
72 &ldlm_srv_namespace_list : &ldlm_cli_active_namespace_list;
73}
74
75static inline struct list_head *ldlm_namespace_inactive_list(ldlm_side_t client)
76{
77 return client == LDLM_NAMESPACE_SERVER ?
78 &ldlm_srv_namespace_list : &ldlm_cli_inactive_namespace_list;
79}
80
81static inline struct mutex *ldlm_namespace_lock(ldlm_side_t client)
82{
83 return client == LDLM_NAMESPACE_SERVER ?
84 &ldlm_srv_namespace_lock : &ldlm_cli_namespace_lock;
85}
86
87
88static inline int ldlm_ns_empty(struct ldlm_namespace *ns)
89{
90 return atomic_read(&ns->ns_bref) == 0;
91}
92
93void ldlm_namespace_move_to_active_locked(struct ldlm_namespace *, ldlm_side_t);
94void ldlm_namespace_move_to_inactive_locked(struct ldlm_namespace *,
95 ldlm_side_t);
96struct ldlm_namespace *ldlm_namespace_first_locked(ldlm_side_t);
97
98
99
100enum {
101 LDLM_CANCEL_AGED = 1 << 0,
102 LDLM_CANCEL_PASSED = 1 << 1,
103 LDLM_CANCEL_SHRINK = 1 << 2,
104 LDLM_CANCEL_LRUR = 1 << 3,
105 LDLM_CANCEL_NO_WAIT = 1 << 4
106
107};
108
109int ldlm_cancel_lru(struct ldlm_namespace *ns, int nr,
110 ldlm_cancel_flags_t sync, int flags);
111int 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);
114extern int ldlm_enqueue_min;
115int ldlm_get_enq_timeout(struct ldlm_lock *lock);
116
117
118int ldlm_resource_putref_locked(struct ldlm_resource *res);
119void ldlm_resource_insert_lock_after(struct ldlm_lock *original,
120 struct ldlm_lock *new);
121void ldlm_namespace_free_prior(struct ldlm_namespace *ns,
122 struct obd_import *imp, int force);
123void ldlm_namespace_free_post(struct ldlm_namespace *ns);
124
125
126struct ldlm_cb_set_arg {
127 struct ptlrpc_request_set *set;
128 int type;
129 atomic_t restart;
130 struct list_head *list;
131 union ldlm_gl_desc *gl_desc;
132};
133
134enum ldlm_desc_ast_t {
135 LDLM_WORK_BL_AST,
136 LDLM_WORK_CP_AST,
137 LDLM_WORK_REVOKE_AST,
138 LDLM_WORK_GL_AST
139};
140
141void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list);
142int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
143 enum req_location loc, void *data, int size);
144struct ldlm_lock *
145ldlm_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);
149ldlm_error_t ldlm_lock_enqueue(struct ldlm_namespace *, struct ldlm_lock **,
150 void *cookie, __u64 *flags);
151void ldlm_lock_addref_internal(struct ldlm_lock *, __u32 mode);
152void ldlm_lock_addref_internal_nolock(struct ldlm_lock *, __u32 mode);
153void ldlm_lock_decref_internal(struct ldlm_lock *, __u32 mode);
154void ldlm_lock_decref_internal_nolock(struct ldlm_lock *, __u32 mode);
155void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
156 struct list_head *work_list);
157int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list,
158 enum ldlm_desc_ast_t ast_type);
159int ldlm_work_gl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq);
160int ldlm_lock_remove_from_lru(struct ldlm_lock *lock);
161int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock);
162void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock);
163void ldlm_lock_add_to_lru(struct ldlm_lock *lock);
164void ldlm_lock_touch_in_lru(struct ldlm_lock *lock);
165void ldlm_lock_destroy_nolock(struct ldlm_lock *lock);
166
167void ldlm_cancel_locks_for_export(struct obd_export *export);
168
169
170int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
171 struct ldlm_lock *lock);
172int ldlm_bl_to_thread_list(struct ldlm_namespace *ns,
173 struct ldlm_lock_desc *ld,
174 struct list_head *cancels, int count,
175 ldlm_cancel_flags_t cancel_flags);
176
177void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
178 struct ldlm_lock_desc *ld, struct ldlm_lock *lock);
179
180extern struct kmem_cache *ldlm_resource_slab;
181
182
183extern struct kmem_cache *ldlm_lock_slab;
184
185
186void ldlm_extent_add_lock(struct ldlm_resource *res, struct ldlm_lock *lock);
187void ldlm_extent_unlink_lock(struct ldlm_lock *lock);
188
189
190int ldlm_process_flock_lock(struct ldlm_lock *req, __u64 *flags,
191 int first_enq, ldlm_error_t *err,
192 struct list_head *work_list);
193int ldlm_init_flock_export(struct obd_export *exp);
194void ldlm_destroy_flock_export(struct obd_export *exp);
195
196
197void l_check_ns_lock(struct ldlm_namespace *ns);
198void l_check_no_ns_lock(struct ldlm_namespace *ns);
199
200extern struct dentry *ldlm_svc_debugfs_dir;
201
202struct ldlm_state {
203 struct ptlrpc_service *ldlm_cb_service;
204 struct ptlrpc_service *ldlm_cancel_service;
205 struct ptlrpc_client *ldlm_client;
206 struct ptlrpc_connection *ldlm_server_conn;
207 struct ldlm_bl_pool *ldlm_bl_pool;
208};
209
210
211extern struct kmem_cache *ldlm_interval_slab;
212void ldlm_interval_attach(struct ldlm_interval *n, struct ldlm_lock *l);
213struct ldlm_interval *ldlm_interval_detach(struct ldlm_lock *l);
214struct ldlm_interval *ldlm_interval_alloc(struct ldlm_lock *lock);
215void ldlm_interval_free(struct ldlm_interval *node);
216
217static inline struct ldlm_extent *
218ldlm_interval_extent(struct ldlm_interval *node)
219{
220 struct ldlm_lock *lock;
221
222 LASSERT(!list_empty(&node->li_group));
223
224 lock = list_entry(node->li_group.next, struct ldlm_lock,
225 l_sl_policy);
226 return &lock->l_policy_data.l_extent;
227}
228
229int ldlm_init(void);
230void ldlm_exit(void);
231
232enum ldlm_policy_res {
233 LDLM_POLICY_CANCEL_LOCK,
234 LDLM_POLICY_KEEP_LOCK,
235 LDLM_POLICY_SKIP_LOCK
236};
237
238typedef enum ldlm_policy_res ldlm_policy_res_t;
239
240#define LDLM_POOL_SYSFS_PRINT_int(v) sprintf(buf, "%d\n", v)
241#define LDLM_POOL_SYSFS_SET_int(a, b) { a = b; }
242#define LDLM_POOL_SYSFS_PRINT_u64(v) sprintf(buf, "%lld\n", v)
243#define LDLM_POOL_SYSFS_SET_u64(a, b) { a = b; }
244#define LDLM_POOL_SYSFS_PRINT_atomic(v) sprintf(buf, "%d\n", atomic_read(&v))
245#define LDLM_POOL_SYSFS_SET_atomic(a, b) atomic_set(&a, b)
246
247#define LDLM_POOL_SYSFS_READER_SHOW(var, type) \
248 static ssize_t var##_show(struct kobject *kobj, \
249 struct attribute *attr, \
250 char *buf) \
251 { \
252 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool, \
253 pl_kobj); \
254 type tmp; \
255 \
256 spin_lock(&pl->pl_lock); \
257 tmp = pl->pl_##var; \
258 spin_unlock(&pl->pl_lock); \
259 \
260 return LDLM_POOL_SYSFS_PRINT_##type(tmp); \
261 } \
262 struct __##var##__dummy_read {; }
263
264#define LDLM_POOL_SYSFS_WRITER_STORE(var, type) \
265 static ssize_t var##_store(struct kobject *kobj, \
266 struct attribute *attr, \
267 const char *buffer, \
268 size_t count) \
269 { \
270 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool, \
271 pl_kobj); \
272 unsigned long tmp; \
273 int rc; \
274 \
275 rc = kstrtoul(buffer, 10, &tmp); \
276 if (rc < 0) { \
277 return rc; \
278 } \
279 \
280 spin_lock(&pl->pl_lock); \
281 LDLM_POOL_SYSFS_SET_##type(pl->pl_##var, tmp); \
282 spin_unlock(&pl->pl_lock); \
283 \
284 return count; \
285 } \
286 struct __##var##__dummy_write {; }
287
288#define LDLM_POOL_SYSFS_READER_NOLOCK_SHOW(var, type) \
289 static ssize_t var##_show(struct kobject *kobj, \
290 struct attribute *attr, \
291 char *buf) \
292 { \
293 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool, \
294 pl_kobj); \
295 \
296 return LDLM_POOL_SYSFS_PRINT_##type(pl->pl_##var); \
297 } \
298 struct __##var##__dummy_read {; }
299
300#define LDLM_POOL_SYSFS_WRITER_NOLOCK_STORE(var, type) \
301 static ssize_t var##_store(struct kobject *kobj, \
302 struct attribute *attr, \
303 const char *buffer, \
304 size_t count) \
305 { \
306 struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool, \
307 pl_kobj); \
308 unsigned long tmp; \
309 int rc; \
310 \
311 rc = kstrtoul(buffer, 10, &tmp); \
312 if (rc < 0) { \
313 return rc; \
314 } \
315 \
316 LDLM_POOL_SYSFS_SET_##type(pl->pl_##var, tmp); \
317 \
318 return count; \
319 } \
320 struct __##var##__dummy_write {; }
321
322static inline int is_granted_or_cancelled(struct ldlm_lock *lock)
323{
324 int ret = 0;
325
326 lock_res_and_lock(lock);
327 if (((lock->l_req_mode == lock->l_granted_mode) &&
328 !(lock->l_flags & LDLM_FL_CP_REQD)) ||
329 (lock->l_flags & (LDLM_FL_FAILED | LDLM_FL_CANCEL)))
330 ret = 1;
331 unlock_res_and_lock(lock);
332
333 return ret;
334}
335
336typedef void (*ldlm_policy_wire_to_local_t)(const ldlm_wire_policy_data_t *,
337 ldlm_policy_data_t *);
338
339typedef void (*ldlm_policy_local_to_wire_t)(const ldlm_policy_data_t *,
340 ldlm_wire_policy_data_t *);
341
342void ldlm_plain_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
343 ldlm_policy_data_t *lpolicy);
344void ldlm_plain_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
345 ldlm_wire_policy_data_t *wpolicy);
346void ldlm_ibits_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
347 ldlm_policy_data_t *lpolicy);
348void ldlm_ibits_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
349 ldlm_wire_policy_data_t *wpolicy);
350void ldlm_extent_policy_wire_to_local(const ldlm_wire_policy_data_t *wpolicy,
351 ldlm_policy_data_t *lpolicy);
352void ldlm_extent_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
353 ldlm_wire_policy_data_t *wpolicy);
354void ldlm_flock_policy_wire18_to_local(const ldlm_wire_policy_data_t *wpolicy,
355 ldlm_policy_data_t *lpolicy);
356void ldlm_flock_policy_wire21_to_local(const ldlm_wire_policy_data_t *wpolicy,
357 ldlm_policy_data_t *lpolicy);
358
359void ldlm_flock_policy_local_to_wire(const ldlm_policy_data_t *lpolicy,
360 ldlm_wire_policy_data_t *wpolicy);
361
