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 enum {
  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. */
  44 };
  45
  46 int ldlm_cancel_lru(struct ldlm_namespace *ns, int nr, ldlm_sync_t sync,
  47                     int flags);
  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
  51 /* ldlm_resource.c */
  52 int ldlm_resource_putref_locked(struct ldlm_resource *res);
  53 void ldlm_resource_insert_lock_after(struct ldlm_lock *original,
  54                                      struct ldlm_lock *new);
  55 int ldlm_namespace_free_prior(struct ldlm_namespace *ns);
  56 int ldlm_namespace_free_post(struct ldlm_namespace *ns, int force);
  57 /* ldlm_lock.c */
  58
  59 /* Number of blocking/completion callbacks that will be sent in
  60  * parallel (see bug 11301). */
  61 #define PARALLEL_AST_LIMIT      200
  62
  63 struct ldlm_cb_set_arg {
  64         struct ptlrpc_request_set *set;
  65         atomic_t restart;
  66         __u32 type; /* LDLM_BL_CALLBACK or LDLM_CP_CALLBACK */
  67 };
  68
  69 typedef enum {
  70         LDLM_WORK_BL_AST,
  71         LDLM_WORK_CP_AST,
  72         LDLM_WORK_REVOKE_AST
  73 } ldlm_desc_ast_t;
  74
  75 void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list);
  76 struct ldlm_lock *
  77 ldlm_lock_create(struct ldlm_namespace *ns, const struct ldlm_res_id *,
  78                  ldlm_type_t type, ldlm_mode_t, ldlm_blocking_callback,
  79                  ldlm_completion_callback, ldlm_glimpse_callback, void *data,
  80                  __u32 lvb_len);
  81 ldlm_error_t ldlm_lock_enqueue(struct ldlm_namespace *, struct ldlm_lock **,
  82                                void *cookie, int *flags);
  83 void ldlm_lock_addref_internal(struct ldlm_lock *, __u32 mode);
  84 void ldlm_lock_decref_internal(struct ldlm_lock *, __u32 mode);
  85 void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
  86                                 struct list_head *work_list);
  87 int ldlm_reprocess_queue(struct ldlm_resource *res, struct list_head *queue,
  88                          struct list_head *work_list);
  89 int ldlm_run_ast_work(struct list_head *rpc_list, ldlm_desc_ast_t ast_type);
  90 int ldlm_lock_remove_from_lru(struct ldlm_lock *lock);
  91 int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock);
  92 void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock);
  93 void ldlm_lock_add_to_lru(struct ldlm_lock *lock);
  94 void ldlm_lock_touch_in_lru(struct ldlm_lock *lock);
  95 void ldlm_lock_destroy_nolock(struct ldlm_lock *lock);
  96
  97 /* ldlm_lockd.c */
  98 int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
  99                            struct ldlm_lock *lock);
 100 int ldlm_bl_to_thread_list(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
 101                            struct list_head *cancels, int count);
 102
 103 void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
 104                              struct ldlm_lock_desc *ld, struct ldlm_lock *lock);
 105
 106 /* ldlm_plain.c */
 107 int ldlm_process_plain_lock(struct ldlm_lock *lock, int *flags, int first_enq,
 108                             ldlm_error_t *err, struct list_head *work_list);
 109
 110 /* ldlm_extent.c */
 111 int ldlm_process_extent_lock(struct ldlm_lock *lock, int *flags, int first_enq,
 112                              ldlm_error_t *err, struct list_head *work_list);
 113
 114 /* ldlm_flock.c */
 115 int ldlm_process_flock_lock(struct ldlm_lock *req, int *flags, int first_enq,
 116                             ldlm_error_t *err, struct list_head *work_list);
 117
 118 /* ldlm_inodebits.c */
 119 int ldlm_process_inodebits_lock(struct ldlm_lock *lock, int *flags,
 120                                 int first_enq, ldlm_error_t *err,
 121                                 struct list_head *work_list);
 122
 123 /* l_lock.c */
 124 void l_check_ns_lock(struct ldlm_namespace *ns);
 125 void l_check_no_ns_lock(struct ldlm_namespace *ns);
 126
 127 extern cfs_proc_dir_entry_t *ldlm_svc_proc_dir;
 128 extern cfs_proc_dir_entry_t *ldlm_type_proc_dir;
 129
 130 struct ldlm_state {
 131         struct ptlrpc_service *ldlm_cb_service;
 132         struct ptlrpc_service *ldlm_cancel_service;
 133         struct ptlrpc_client *ldlm_client;
 134         struct ptlrpc_connection *ldlm_server_conn;
 135         struct ldlm_bl_pool *ldlm_bl_pool;
 136 };
 137
 138 int ldlm_init(void);
 139 void ldlm_exit(void);
 140