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https://git.openldap.org/openldap/openldap.git
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88c43a1e6e
The new e_private field can be used for any backend purpose. In LDBM, it's used to point th the private entry info struct. The LDBM entry info struct is only visible to the LDBM cache. WARNING: This change has not be ported to other backends! Breakage is likely.
147 lines
3.6 KiB
C
147 lines
3.6 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 ENTRY_STATE_DELETED 1
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#define ENTRY_STATE_CREATING 2
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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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};
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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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