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150 lines
3.7 KiB
C
150 lines
3.7 KiB
C
/* back-ldbm.h - ldap ldbm back-end header file */
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#ifndef _BACK_LDBM_H_
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#define _BACK_LDBM_H_
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#include "ldbm.h"
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LDAP_BEGIN_DECL
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#define DEFAULT_CACHE_SIZE 1000
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#ifdef HAVE_BERKELEY_DB2
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# define DEFAULT_DBCACHE_SIZE (100 * DEFAULT_DB_PAGE_SIZE)
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#else
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# define DEFAULT_DBCACHE_SIZE 100000
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#endif
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#define DEFAULT_DB_DIRECTORY "/usr/tmp"
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#define DEFAULT_MODE 0600
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#define SUBLEN 3
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/*
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* there is a single index for each attribute. these prefixes insure
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* that there is no collision among keys.
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*/
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#define EQ_PREFIX '=' /* prefix for equality keys */
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#define APPROX_PREFIX '~' /* prefix for approx keys */
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#define SUB_PREFIX '*' /* prefix for substring keys */
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#define CONT_PREFIX '\\' /* prefix for continuation keys */
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#define UNKNOWN_PREFIX '?' /* prefix for unknown keys */
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#define DEFAULT_BLOCKSIZE 8192
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/*
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* This structure represents an id block on disk and an id list
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* in core.
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*
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* The fields have the following meanings:
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*
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* b_nmax maximum number of ids in this block. if this is == ALLIDSBLOCK,
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* then this block represents all ids.
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* b_nids current number of ids in use in this block. if this
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* is == INDBLOCK, then this block is an indirect block
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* containing a list of other blocks containing actual ids.
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* the list is terminated by an id of NOID.
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* b_ids a list of the actual ids themselves
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*/
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typedef ID ID_BLOCK;
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#define ID_BLOCK_NMAX_OFFSET 0
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#define ID_BLOCK_NIDS_OFFSET 1
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#define ID_BLOCK_IDS_OFFSET 2
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/* all ID_BLOCK macros operate on a pointer to a ID_BLOCK */
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#define ID_BLOCK_NMAX(b) ((b)[ID_BLOCK_NMAX_OFFSET])
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#define ID_BLOCK_NIDS(b) ((b)[ID_BLOCK_NIDS_OFFSET])
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#define ID_BLOCK_ID(b, n) ((b)[ID_BLOCK_IDS_OFFSET+(n)])
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#define ID_BLOCK_NOID(b, n) (ID_BLOCK_ID((b),(n)) == NOID)
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#define ID_BLOCK_ALLIDS_VALUE 0
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#define ID_BLOCK_ALLIDS(b) (ID_BLOCK_NMAX(b) == ID_BLOCK_ALLIDS_VALUE)
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#define ID_BLOCK_INDIRECT_VALUE 0
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#define ID_BLOCK_INDIRECT(b) (ID_BLOCK_NIDS(b) == ID_BLOCK_INDIRECT_VALUE)
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/* for the in-core cache of entries */
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struct cache {
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int c_maxsize;
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int c_cursize;
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Avlnode *c_dntree;
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Avlnode *c_idtree;
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Entry *c_lruhead; /* lru - add accessed entries here */
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Entry *c_lrutail; /* lru - rem lru entries from here */
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ldap_pvt_thread_mutex_t c_mutex;
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};
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#define CACHE_READ_LOCK 0
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#define CACHE_WRITE_LOCK 1
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/* for the cache of open index files */
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struct dbcache {
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int dbc_refcnt;
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int dbc_maxids;
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int dbc_maxindirect;
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time_t dbc_lastref;
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long dbc_blksize;
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char *dbc_name;
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LDBM dbc_db;
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};
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/* for the cache of attribute information (which are indexed, etc.) */
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struct attrinfo {
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char *ai_type; /* type name (cn, sn, ...) */
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int ai_indexmask; /* how the attr is indexed */
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#define INDEX_PRESENCE 0x01
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#define INDEX_EQUALITY 0x02
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#define INDEX_APPROX 0x04
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#define INDEX_SUB 0x08
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#define INDEX_UNKNOWN 0x10
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#define INDEX_FROMINIT 0x20
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int ai_syntaxmask; /* what kind of syntax */
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/* ...from slap.h...
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#define SYNTAX_CIS 0x01
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#define SYNTAX_CES 0x02
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#define SYNTAX_BIN 0x04
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... etc. ...
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*/
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};
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#define MAXDBCACHE 10
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/* this could be made an option */
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#ifndef SLAPD_NEXTID_CHUNK
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#define SLAPD_NEXTID_CHUNK 32
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#endif
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struct ldbminfo {
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ID li_nextid;
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#if SLAPD_NEXTID_CHUNK > 1
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ID li_nextid_wrote;
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#endif
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char *li_nextid_file;
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ldap_pvt_thread_mutex_t li_root_mutex;
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ldap_pvt_thread_mutex_t li_add_mutex;
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ldap_pvt_thread_mutex_t li_nextid_mutex;
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int li_mode;
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char *li_directory;
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struct cache li_cache;
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Avlnode *li_attrs;
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int li_dbcachesize;
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int li_dbcachewsync;
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struct dbcache li_dbcache[MAXDBCACHE];
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ldap_pvt_thread_mutex_t li_dbcache_mutex;
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ldap_pvt_thread_cond_t li_dbcache_cv;
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#ifdef HAVE_BERKELEY_DB2
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DB_ENV li_db_env;
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#endif
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};
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#include "proto-back-ldbm.h"
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LDAP_END_DECL
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#endif /* _back_ldbm_h_ */
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