lustre/include/lustre_cache.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  */
   4
   5 #ifndef LUSTRE_CACHE_H
   6 #define LUSTRE_CACHE_H
   7 #include <obd.h>
   8 #include <lustre/lustre_idl.h>
   9 #include <lustre_dlm.h>
  10
  11 struct lustre_cache;
  12 struct osc_async_page;
  13 struct page_removal_cb_element {
  14         struct list_head        prce_list;
  15         obd_page_removal_cb_t   prce_callback;
  16         atomic_t                prce_refcnt;
  17 };
  18
  19 typedef int (*cache_iterate_extents_cb_t)(struct lustre_cache *,
  20                                           struct lustre_handle *,
  21                                           struct osc_async_page *,
  22                                           void *);
  23 typedef int (*cache_iterate_locks_cb_t)(struct lustre_cache *,
  24                                         struct ldlm_res_id *,
  25                                         struct lustre_handle *, void *);
  26
  27 struct lustre_cache {
  28         struct list_head         lc_locks_list;
  29         spinlock_t               lc_locks_list_lock;
  30         struct list_head         lc_page_removal_callback_list;
  31         rwlock_t                 lc_page_removal_cb_lock; /* iterate vs modify list */
  32         struct obd_device       *lc_obd;
  33         obd_pin_extent_cb        lc_pin_extent_cb;
  34 };
  35
  36 int cache_add_lock(struct lustre_cache *cache, struct lustre_handle *lockh);
  37 int cache_add_extent(struct lustre_cache *cache, struct ldlm_res_id *res,
  38                      struct osc_async_page *extent,
  39                      struct lustre_handle *lockh);
  40 void cache_remove_extent(struct lustre_cache *, struct osc_async_page *);
  41 int cache_add_extent_removal_cb(struct lustre_cache *cache,
  42                                 obd_page_removal_cb_t func_cb,
  43                                 obd_pin_extent_cb pin_cb);
  44 int cache_del_extent_removal_cb(struct lustre_cache *cache,
  45                                 obd_page_removal_cb_t func_cb);
  46 int cache_iterate_extents(struct lustre_cache *cache, struct lustre_handle *lockh,
  47                           cache_iterate_extents_cb_t cb_func, void *data);
  48 int cache_remove_lock(struct lustre_cache *cache, struct lustre_handle *lockh);
  49 int cache_iterate_locks(struct lustre_cache *cache, struct ldlm_res_id *res,
  50                         cache_iterate_locks_cb_t cb_fun, void *data);
  51 struct lustre_cache *cache_create(struct obd_device *obd);
  52 int cache_destroy(struct lustre_cache *cache);
  53
  54
  55 #endif /* LUSTRE_CACHE_H */