1 /* back-ldbm.h - ldap ldbm back-end header file */
4 * Copyright 1998-2000 The OpenLDAP Foundation, All Rights Reserved.
5 * COPYING RESTRICTIONS APPLY, see COPYRIGHT file
15 #define DEFAULT_CACHE_SIZE 1000
17 #if defined(HAVE_BERKELEY_DB) && DB_VERSION_MAJOR >= 2
18 # define DEFAULT_DBCACHE_SIZE (100 * DEFAULT_DB_PAGE_SIZE)
20 # define DEFAULT_DBCACHE_SIZE 100000
23 #define DEFAULT_DB_DIRECTORY LDAP_RUNDIR LDAP_DIRSEP "openldap-ldbm"
24 #define DEFAULT_MODE 0600
28 #define DN_BASE_PREFIX SLAP_INDEX_EQUALITY_PREFIX
29 #define DN_ONE_PREFIX '%'
30 #define DN_SUBTREE_PREFIX '@'
33 * there is a single index for each attribute. these prefixes ensure
34 * that there is no collision among keys.
37 /* allow PREFIX + byte for continuate number */
38 #define SLAP_INDEX_CONT_SIZE ( sizeof(SLAP_INDEX_CONT_PREFIX) + sizeof(unsigned char) )
40 #define DEFAULT_BLOCKSIZE 8192
43 * This structure represents an id block on disk and an id list
46 * The fields have the following meanings:
48 * b_nmax maximum number of ids in this block. if this is == ALLIDSBLOCK,
49 * then this block represents all ids.
50 * b_nids current number of ids in use in this block. if this
51 * is == INDBLOCK, then this block is an indirect block
52 * containing a list of other blocks containing actual ids.
53 * the list is terminated by an id of NOID.
54 * b_ids a list of the actual ids themselves
59 #define ID_BLOCK_NMAX_OFFSET 0
60 #define ID_BLOCK_NIDS_OFFSET 1
61 #define ID_BLOCK_IDS_OFFSET 2
63 /* all ID_BLOCK macros operate on a pointer to a ID_BLOCK */
65 #define ID_BLOCK_NMAX(b) ((b)[ID_BLOCK_NMAX_OFFSET])
66 #define ID_BLOCK_NIDS(b) ((b)[ID_BLOCK_NIDS_OFFSET])
67 #define ID_BLOCK_ID(b, n) ((b)[ID_BLOCK_IDS_OFFSET+(n)])
69 #define ID_BLOCK_NOID(b, n) (ID_BLOCK_ID((b),(n)) == NOID)
71 #define ID_BLOCK_ALLIDS_VALUE 0
72 #define ID_BLOCK_ALLIDS(b) (ID_BLOCK_NMAX(b) == ID_BLOCK_ALLIDS_VALUE)
74 #define ID_BLOCK_INDIRECT_VALUE 0
75 #define ID_BLOCK_INDIRECT(b) (ID_BLOCK_NIDS(b) == ID_BLOCK_INDIRECT_VALUE)
77 /* for the in-core cache of entries */
78 typedef struct ldbm_cache {
83 Entry *c_lruhead; /* lru - add accessed entries here */
84 Entry *c_lrutail; /* lru - rem lru entries from here */
85 ldap_pvt_thread_mutex_t c_mutex;
88 #define CACHE_READ_LOCK 0
89 #define CACHE_WRITE_LOCK 1
91 /* for the cache of open index files */
92 typedef struct ldbm_dbcache {
102 #define MAXDBCACHE 128
106 ldap_pvt_thread_mutex_t li_nextid_mutex;
107 ldap_pvt_thread_mutex_t li_root_mutex;
108 ldap_pvt_thread_mutex_t li_add_mutex;
110 slap_index li_defaultmask;
114 int li_dblocking; /* lock databases */
115 int li_dbwritesync; /* write sync */
117 DBCache li_dbcache[MAXDBCACHE];
118 ldap_pvt_thread_mutex_t li_dbcache_mutex;
119 ldap_pvt_thread_cond_t li_dbcache_cv;
124 #include "proto-back-ldbm.h"
126 #endif /* _back_ldbm_h_ */