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forward porting of time/size limits from back-ldbm (pending the definition of the most appropriate way to determine the number of candidates)

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This commit is contained in:
Pierangelo Masarati 2001-10-02 12:00:01 +00:00
parent 4ac9b37db7
commit becb7ff0ce
1 changed files with 80 additions and 10 deletions
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90
servers/slapd/back-bdb/search.c
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@ -57,6 +57,9 @@ bdb_search(
int nentries = 0;
int manageDSAit;
struct slap_limits_set *limit = NULL;
int isroot = 0;
Debug( LDAP_DEBUG_TRACE, "=> bdb_back_search\n",
0, 0, 0);
@ -132,21 +135,73 @@ bdb_search(
return 1;
}
if ( tlimit == 0 && be_isroot( be, op->o_ndn ) ) {
tlimit = -1; /* allow root to set no limit */
/* if not root, get appropriate limits */
if ( be_isroot( be, op->o_ndn ) ) {
isroot = 1;
} else {
tlimit = (tlimit > be->be_timelimit || tlimit < 1) ?
be->be_timelimit : tlimit;
stoptime = op->o_time + tlimit;
( void ) get_limits( be, op->o_ndn, &limit );
}
if ( slimit == 0 && be_isroot( be, op->o_ndn ) ) {
slimit = -1; /* allow root to set no limit */
} else {
slimit = (slimit > be->be_sizelimit || slimit < 1) ?
be->be_sizelimit : slimit;
/* The time/size limits come first because they require very little
* effort, so there's no chance the candidates are selected and then
* the request is not honored only because of time/size constraints */
/* if no time limit requested, use soft limit (unless root!) */
if ( tlimit <= 0 ) {
if ( isroot ) {
tlimit = -1; /* allow root to set no limit */
} else {
tlimit = limit->lms_t_soft;
}
/* if requested limit higher than hard limit, abort */
} else if ( tlimit > limit->lms_t_hard ) {
/* no hard limit means use soft instead */
if ( limit->lms_t_hard == 0 ) {
tlimit = limit->lms_t_soft;
/* positive hard limit means abort */
} else if ( limit->lms_t_hard > 0 ) {
send_search_result( conn, op,
LDAP_UNWILLING_TO_PERFORM,
NULL, NULL, NULL, NULL, 0 );
rc = 0;
goto done;
}
/* negative hard limit means no limit */
}
/* compute it anyway; root does not use it */
stoptime = op->o_time + tlimit;
/* if no size limit requested, use soft limit (unless root!) */
if ( slimit == 0 ) {
if ( isroot ) {
slimit = -1; /* allow root to set no limit */
} else {
slimit = limit->lms_s_soft;
}
/* if requested limit higher than hard limit, abort */
} else if ( slimit > limit->lms_s_hard ) {
/* no hard limit means use soft instead */
if ( limit->lms_s_hard == 0 ) {
slimit = limit->lms_s_soft;
/* positive hard limit means abort */
} else if ( limit->lms_s_hard > 0 ) {
send_search_result( conn, op,
LDAP_UNWILLING_TO_PERFORM,
NULL, NULL, NULL, NULL, 0 );
rc = 0;
goto done;
}
/* negative hard limit means no limit */
}
/* select candidates */
if ( scope == LDAP_SCOPE_BASE ) {
rc = base_candidate( be, e, candidates );
@ -176,6 +231,21 @@ bdb_search(
goto done;
}
/* if not root and candidates exceed to-be-checked entries, abort */
if ( !isroot && limit->lms_s_unchecked != -1 ) {
unsigned long n =
1 + (BDB_IDL_IS_RANGE( candidates ) ? candidates[ 2 ] :
candidates[ candidates[ 0 ] ])-candidates[ 1 ];
if ( n > limit->lms_s_unchecked ) {
send_search_result( conn, op,
LDAP_UNWILLING_TO_PERFORM,
NULL, NULL, NULL, NULL, 0 );
rc = 1;
goto done;
}
}
for ( id = bdb_idl_first( candidates, &cursor );
id != NOID;
id = bdb_idl_next( candidates, &cursor ) )