lustre/ldlm/ldlm_internal.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  */
   4
   5 #define MAX_STRING_SIZE 128
   6
   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;
  13
  14 static inline atomic_t *ldlm_namespace_nr(ldlm_side_t client)
  15 {
  16         return client == LDLM_NAMESPACE_SERVER ?
  17                 &ldlm_srv_namespace_nr : &ldlm_cli_namespace_nr;
  18 }
  19
  20 static inline struct list_head *ldlm_namespace_list(ldlm_side_t client)
  21 {
  22         return client == LDLM_NAMESPACE_SERVER ?
  23                 &ldlm_srv_namespace_list : &ldlm_cli_namespace_list;
  24 }
  25
  26 static inline struct semaphore *ldlm_namespace_lock(ldlm_side_t client)
  27 {
  28         return client == LDLM_NAMESPACE_SERVER ?
  29                 &ldlm_srv_namespace_lock : &ldlm_cli_namespace_lock;
  30 }
  31
  32 /* ldlm_request.c */
  33 typedef enum {
  34         LDLM_ASYNC,
  35         LDLM_SYNC,
  36 } ldlm_sync_t;
  37
  38 /* Cancel lru flag, it indicates we cancel aged locks. */
  39 #define LDLM_CANCEL_AGED 0x00000001
  40
  41 int ldlm_cancel_lru(struct ldlm_namespace *ns, int nr, ldlm_sync_t sync);
  42 int ldlm_cancel_lru_local(struct ldlm_namespace *ns, struct list_head *cancels,
  43                           int count, int max, int flags);
  44
  45 /* ldlm_resource.c */
  46 int ldlm_resource_putref_locked(struct ldlm_resource *res);
  47 void ldlm_resource_insert_lock_after(struct ldlm_lock *original,
  48                                      struct ldlm_lock *new);
  49
  50 /* ldlm_lock.c */
  51
  52 /* Number of blocking/completion callbacks that will be sent in
  53  * parallel (see bug 11301). */
  54 #define PARALLEL_AST_LIMIT      200
  55
  56 struct ldlm_cb_set_arg {
  57         struct ptlrpc_request_set *set;
  58         atomic_t restart;
  59         __u32 type; /* LDLM_BL_CALLBACK or LDLM_CP_CALLBACK */
  60 };
  61
  62 void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list);
  63 struct ldlm_lock *
  64 ldlm_lock_create(struct ldlm_namespace *ns, const struct ldlm_res_id *,
  65                  ldlm_type_t type, ldlm_mode_t, ldlm_blocking_callback,
  66                  ldlm_completion_callback, ldlm_glimpse_callback, void *data,
  67                  __u32 lvb_len);
  68 ldlm_error_t ldlm_lock_enqueue(struct ldlm_namespace *, struct ldlm_lock **,
  69                                void *cookie, int *flags);
  70 void ldlm_lock_addref_internal(struct ldlm_lock *, __u32 mode);
  71 void ldlm_lock_decref_internal(struct ldlm_lock *, __u32 mode);
  72 void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
  73                                 struct list_head *work_list);
  74 int ldlm_reprocess_queue(struct ldlm_resource *res, struct list_head *queue,
  75                          struct list_head *work_list);
  76 int ldlm_run_bl_ast_work(struct list_head *rpc_list);
  77 int ldlm_run_cp_ast_work(struct list_head *rpc_list);
  78 int ldlm_lock_remove_from_lru(struct ldlm_lock *lock);
  79 int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock);
  80 void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock);
  81 void ldlm_lock_add_to_lru(struct ldlm_lock *lock);
  82 void ldlm_lock_touch_in_lru(struct ldlm_lock *lock);
  83 void ldlm_lock_destroy_nolock(struct ldlm_lock *lock);
  84
  85 /* ldlm_lockd.c */
  86 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
  87                            struct ldlm_lock *lock);
  88 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
  89                            struct list_head *cancels, int count);
  90
  91 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
  92                              struct ldlm_lock_desc *ld, struct ldlm_lock *lock);
  93
  94 /* ldlm_plain.c */
  95 int ldlm_process_plain_lock(struct ldlm_lock *lock, int *flags, int first_enq,
  96                             ldlm_error_t *err, struct list_head *work_list);
  97
  98 /* ldlm_extent.c */
  99 int ldlm_process_extent_lock(struct ldlm_lock *lock, int *flags, int first_enq,
 100                              ldlm_error_t *err, struct list_head *work_list);
 101
 102 /* ldlm_flock.c */
 103 int ldlm_process_flock_lock(struct ldlm_lock *req, int *flags, int first_enq,
 104                             ldlm_error_t *err, struct list_head *work_list);
 105
 106 /* ldlm_inodebits.c */
 107 int ldlm_process_inodebits_lock(struct ldlm_lock *lock, int *flags,
 108                                 int first_enq, ldlm_error_t *err,
 109                                 struct list_head *work_list);
 110
 111 /* l_lock.c */
 112 void l_check_ns_lock(struct ldlm_namespace *ns);
 113 void l_check_no_ns_lock(struct ldlm_namespace *ns);
 114
 115 extern cfs_proc_dir_entry_t *ldlm_svc_proc_dir;
 116 extern cfs_proc_dir_entry_t *ldlm_type_proc_dir;
 117
 118 struct ldlm_state {
 119         struct ptlrpc_service *ldlm_cb_service;
 120         struct ptlrpc_service *ldlm_cancel_service;
 121         struct ptlrpc_client *ldlm_client;
 122         struct ptlrpc_connection *ldlm_server_conn;
 123         struct ldlm_bl_pool *ldlm_bl_pool;
 124 };
 125
 126 int ldlm_init(void);
 127 void ldlm_exit(void);
 128