1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
5 #define MAX_STRING_SIZE 128
7 extern atomic_t ldlm_srv_namespace_nr;
8 extern atomic_t ldlm_cli_namespace_nr;
9 extern struct semaphore ldlm_srv_namespace_lock;
10 extern struct list_head ldlm_srv_namespace_list;
11 extern struct semaphore ldlm_cli_namespace_lock;
12 extern struct list_head ldlm_cli_namespace_list;
14 static inline atomic_t *ldlm_namespace_nr(ldlm_side_t client)
16 return client == LDLM_NAMESPACE_SERVER ?
17 &ldlm_srv_namespace_nr : &ldlm_cli_namespace_nr;
20 static inline struct list_head *ldlm_namespace_list(ldlm_side_t client)
22 return client == LDLM_NAMESPACE_SERVER ?
23 &ldlm_srv_namespace_list : &ldlm_cli_namespace_list;
26 static inline struct semaphore *ldlm_namespace_lock(ldlm_side_t client)
28 return client == LDLM_NAMESPACE_SERVER ?
29 &ldlm_srv_namespace_lock : &ldlm_cli_namespace_lock;
38 /* Cancel lru flag, it indicates we cancel aged locks. */
40 LDLM_CANCEL_AGED = 1 << 0, /* Cancel aged locks (non lru resize). */
41 LDLM_CANCEL_PASSED = 1 << 1, /* Cancel passed number of locks. */
42 LDLM_CANCEL_SHRINK = 1 << 2, /* Cancel locks from shrinker. */
43 LDLM_CANCEL_LRUR = 1 << 3 /* Cancel locks from lru resize. */
46 int ldlm_cancel_lru(struct ldlm_namespace *ns, int nr, ldlm_sync_t sync,
48 int ldlm_cancel_lru_local(struct ldlm_namespace *ns, struct list_head *cancels,
49 int count, int max, int cancel_flags, int flags);
50 int ldlm_cancel_lru_estimate(struct ldlm_namespace *ns, int count, int max,
54 int ldlm_resource_putref_locked(struct ldlm_resource *res);
55 void ldlm_resource_insert_lock_after(struct ldlm_lock *original,
56 struct ldlm_lock *new);
57 int ldlm_namespace_free_prior(struct ldlm_namespace *ns);
58 int ldlm_namespace_free_post(struct ldlm_namespace *ns, int force);
61 /* Number of blocking/completion callbacks that will be sent in
62 * parallel (see bug 11301). */
63 #define PARALLEL_AST_LIMIT 200
65 struct ldlm_cb_set_arg {
66 struct ptlrpc_request_set *set;
68 __u32 type; /* LDLM_BL_CALLBACK or LDLM_CP_CALLBACK */
77 void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list);
79 ldlm_lock_create(struct ldlm_namespace *ns, const struct ldlm_res_id *,
80 ldlm_type_t type, ldlm_mode_t, ldlm_blocking_callback,
81 ldlm_completion_callback, ldlm_glimpse_callback, void *data,
83 ldlm_error_t ldlm_lock_enqueue(struct ldlm_namespace *, struct ldlm_lock **,
84 void *cookie, int *flags);
85 void ldlm_lock_addref_internal(struct ldlm_lock *, __u32 mode);
86 void ldlm_lock_decref_internal(struct ldlm_lock *, __u32 mode);
87 void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
88 struct list_head *work_list);
89 int ldlm_reprocess_queue(struct ldlm_resource *res, struct list_head *queue,
90 struct list_head *work_list);
91 int ldlm_run_ast_work(struct list_head *rpc_list, ldlm_desc_ast_t ast_type);
92 int ldlm_lock_remove_from_lru(struct ldlm_lock *lock);
93 int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock);
94 void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock);
95 void ldlm_lock_add_to_lru(struct ldlm_lock *lock);
96 void ldlm_lock_touch_in_lru(struct ldlm_lock *lock);
97 void ldlm_lock_destroy_nolock(struct ldlm_lock *lock);
100 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
101 struct ldlm_lock *lock);
102 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
103 struct list_head *cancels, int count);
105 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
106 struct ldlm_lock_desc *ld, struct ldlm_lock *lock);
109 int ldlm_process_plain_lock(struct ldlm_lock *lock, int *flags, int first_enq,
110 ldlm_error_t *err, struct list_head *work_list);
113 int ldlm_process_extent_lock(struct ldlm_lock *lock, int *flags, int first_enq,
114 ldlm_error_t *err, struct list_head *work_list);
115 void ldlm_extent_add_lock(struct ldlm_resource *res, struct ldlm_lock *lock);
116 void ldlm_extent_unlink_lock(struct ldlm_lock *lock);
119 int ldlm_process_flock_lock(struct ldlm_lock *req, int *flags, int first_enq,
120 ldlm_error_t *err, struct list_head *work_list);
122 /* ldlm_inodebits.c */
123 int ldlm_process_inodebits_lock(struct ldlm_lock *lock, int *flags,
124 int first_enq, ldlm_error_t *err,
125 struct list_head *work_list);
128 void l_check_ns_lock(struct ldlm_namespace *ns);
129 void l_check_no_ns_lock(struct ldlm_namespace *ns);
131 extern cfs_proc_dir_entry_t *ldlm_svc_proc_dir;
132 extern cfs_proc_dir_entry_t *ldlm_type_proc_dir;
135 struct ptlrpc_service *ldlm_cb_service;
136 struct ptlrpc_service *ldlm_cancel_service;
137 struct ptlrpc_client *ldlm_client;
138 struct ptlrpc_connection *ldlm_server_conn;
139 struct ldlm_bl_pool *ldlm_bl_pool;
142 /* interval tree, for LDLM_EXTENT. */
143 extern cfs_mem_cache_t *ldlm_interval_slab; /* slab cache for ldlm_interval */
144 extern void ldlm_interval_attach(struct ldlm_interval *n, struct ldlm_lock *l);
145 extern struct ldlm_interval *ldlm_interval_detach(struct ldlm_lock *l);
146 extern struct ldlm_interval *ldlm_interval_alloc(struct ldlm_lock *lock);
147 extern void ldlm_interval_free(struct ldlm_interval *node);
148 /* this function must be called with res lock held */
149 static inline struct ldlm_extent *
150 ldlm_interval_extent(struct ldlm_interval *node)
152 struct ldlm_lock *lock;
153 LASSERT(!list_empty(&node->li_group));
155 lock = list_entry(node->li_group.next, struct ldlm_lock, l_sl_policy);
156 return &lock->l_policy_data.l_extent;
160 void ldlm_exit(void);
162 enum ldlm_policy_res {
163 LDLM_POLICY_CANCEL_LOCK,
164 LDLM_POLICY_KEEP_LOCK
167 typedef enum ldlm_policy_res ldlm_policy_res_t;
169 #define LDLM_POOL_PROC_READER(var, type) \
170 static int lprocfs_rd_##var(char *page, char **start, off_t off, \
171 int count, int *eof, void *data) \
173 struct ldlm_pool *pl = data; \
176 spin_lock(&pl->pl_lock); \
177 tmp = pl->pl_##var; \
178 spin_unlock(&pl->pl_lock); \
180 return lprocfs_rd_uint(page, start, off, count, eof, &tmp); \
182 struct __##var##__dummy_read {;} /* semicolon catcher */
184 #define LDLM_POOL_PROC_WRITER(var, type) \
185 int lprocfs_wr_##var(struct file *file, const char *buffer, \
186 unsigned long count, void *data) \
188 struct ldlm_pool *pl = data; \
192 rc = lprocfs_wr_uint(file, buffer, count, &tmp); \
194 CERROR("Can't parse user input, rc = %d\n", rc); \
198 spin_lock(&pl->pl_lock); \
199 pl->pl_##var = tmp; \
200 spin_unlock(&pl->pl_lock); \
204 struct __##var##__dummy_write {;} /* semicolon catcher */