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, Version 1.0 only
   6  * (the "License").  You may not use this file except in compliance
   7  * with the License.
   8  *
   9  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
  10  * or http://www.opensolaris.org/os/licensing.
  11  * See the License for the specific language governing permissions
  12  * and limitations under the License.
  13  *
  14  * When distributing Covered Code, include this CDDL HEADER in each
  15  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  16  * If applicable, add the following below this CDDL HEADER, with the
  17  * fields enclosed by brackets "[]" replaced with your own identifying
  18  * information: Portions Copyright [yyyy] [name of copyright owner]
  19  *
  20  * CDDL HEADER END
  21  */
  22 /*
  23  *
  24  *                      cfsd_maptbl.h
  25  *
  26  * Include file for the maptbl class.
  27  */
  28 
  29 #pragma ident   "%Z%%M% %I%     %E% SMI"
  30 /* Copyright (c) 1994 by Sun Microsystems, Inc. */
  31 
  32 #ifndef CFSD_MAPTBL
  33 #define CFSD_MAPTBL
  34 
  35 typedef struct cfsd_maptbl_object {
  36         char            i_name[MAXPATHLEN * 3]; /* name of file */
  37         int             i_fid;                  /* fid of file */
  38         off_t           i_size;                 /* file size */
  39         int             i_entries;              /* number of entries */
  40         int             i_hash2mod;             /* second hash module value */
  41         int             i_stat_filled;          /* number of filled entries */
  42         int             i_stat_requests;        /* number of lookups done */
  43         int             i_stat_probes;          /* number of probes */
  44         int             i_stat_mapmove;         /* number of times map moved */
  45         long            i_stat_mapdist;         /* how far we move the map */
  46         caddr_t i_pa;                           /* address of mmap section */
  47         size_t  i_palen;                        /* length of mmap section */
  48         off_t           i_paoff;                /* offset of mmap section */
  49         off_t           i_paend;                /* end offset of mmap section */
  50         long            i_pagesize;             /* size of a page */
  51         u_long  i_pagemask;                     /* page alignment mask */
  52         long            i_maplen;               /* amount to map */
  53 } cfsd_maptbl_object_t;
  54 
  55 cfsd_maptbl_object_t *cfsd_maptbl_create(void);
  56 void cfsd_maptbl_destroy(cfsd_maptbl_object_t *maptbl_object_p);
  57 
  58 int maptbl_domap(cfsd_maptbl_object_t *maptbl_object_p, off_t off);
  59 caddr_t maptbl_getaddr(cfsd_maptbl_object_t *maptbl_object_p, int index);
  60 int maptbll_cidhashaddr(cfsd_maptbl_object_t *maptbl_object_p,
  61     cfs_cid_t cid, caddr_t *addrp);
  62 int maptbl_hash1(cfsd_maptbl_object_t *maptbl_object_p, cfs_cid_t cid);
  63 int maptbl_hash2(cfsd_maptbl_object_t *maptbl_object_p, cfs_cid_t cid,
  64     int index);
  65 
  66 /* performs setup for the specified file */
  67 int maptbl_setup(cfsd_maptbl_object_t *maptbl_object_p, const char *filename);
  68 void maptbl_teardown(cfsd_maptbl_object_t *maptbl_object_p);
  69 
  70 /* gets/sets cid mapping */
  71 int maptbl_get(cfsd_maptbl_object_t *maptbl_object_p, cfs_cid_t cid,
  72     struct cfs_dlog_mapping_space *valuep);
  73 int maptbl_set(cfsd_maptbl_object_t *maptbl_object_p,
  74     struct cfs_dlog_mapping_space *valuep, int insert);
  75 
  76 /* prints out various stats about the hashing */
  77 void maptbl_dumpstats(cfsd_maptbl_object_t *maptbl_object_p);
  78 
  79 #endif /* CFSD_MAPTBL */