usr/src/cmd/isns/isnsd/isns_cache.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #ifndef _ISNS_CACHE_H
  28 #define _ISNS_CACHE_H
  29
  30 #include <synch.h>
  31 #include <isns_htab.h>
  32 #include <isns_dd.h>
  33
  34 #ifdef __cplusplus
  35 extern "C" {
  36 #endif
  37
  38 #define CACHE_FLAG_UPDATED      0x1
  39
  40 #define SET_CACHE_UPDATED()     (cache_flag |= CACHE_FLAG_UPDATED)
  41 #define RESET_CACHE_UPDATED()   (cache_flag &= ~CACHE_FLAG_UPDATED)
  42
  43 #define IS_CACHE_UPDATED()      (cache_flag & CACHE_FLAG_UPDATED)
  44
  45 #define CACHE_NO_ACTION (0)
  46 #define CACHE_READ      (1)
  47 #define CACHE_TRY_READ  (2)
  48 #define CACHE_WRITE     (3)
  49
  50 typedef struct cache {
  51         rwlock_t l;
  52         htab_t **t;
  53         matrix_t **x;
  54         uint32_t (*get_hval)(void *, uint16_t, uint32_t *);
  55         uint32_t (*get_uid)(const void *);
  56         uint32_t (*set_uid)(void *, uint32_t);
  57         uint32_t (*timestamp)(void);
  58         int (*add_hook)(void *);
  59         int (*replace_hook)(void *, void *, uint32_t *, int);
  60         int (*cmp)(void *, void *, int);
  61         void *(*clone)(void *, int);
  62         int (*ddd)(void *, const uchar_t);
  63 #ifdef DEBUG
  64         void (*dump)(void *);
  65 #endif
  66 } cache_t;
  67
  68 int cache_init(void);
  69 void cache_destroy(void);
  70 int cache_lock(int);
  71 int cache_unlock(int, int);
  72 int cache_lock_read(void);
  73 int cache_lock_write(void);
  74 int cache_unlock_sync(int);
  75 int cache_unlock_nosync(void);
  76 htab_t *cache_get_htab(isns_type_t);
  77 matrix_t *cache_get_matrix(isns_type_t);
  78 int cache_lookup(lookup_ctrl_t *, uint32_t *, int (*)(void *, void *));
  79 int cache_rekey(lookup_ctrl_t *, uint32_t *, int (*)(void *, void *));
  80 int cache_add(isns_obj_t *, int, uint32_t *, int *);
  81 isns_obj_t *cache_remove(lookup_ctrl_t *, int);
  82
  83 #ifdef DEBUG
  84 void cache_dump_htab(isns_type_t);
  85 #endif
  86
  87 #ifdef __cplusplus
  88 }
  89 #endif
  90
  91 #endif /* _ISNS_CACHE_H */