X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=servers%2Fslapd%2Foverlays%2Fsyncprov.c;h=160b57a28990b56f2d8427bb13ca43c54fad3232;hb=0ba50a1d064ef71145fe0a08d813d710634a23b4;hp=69be484165452ff6d7e4b4491188250ab1ef277c;hpb=dec097f8b0f6752f6fe16ccbb623accf211ca319;p=openldap
diff --git a/servers/slapd/overlays/syncprov.c b/servers/slapd/overlays/syncprov.c
index 69be484165..160b57a289 100644
--- a/servers/slapd/overlays/syncprov.c
+++ b/servers/slapd/overlays/syncprov.c
@@ -2,7 +2,7 @@
/* syncprov.c - syncrepl provider */
/* This work is part of OpenLDAP Software .
*
- * Copyright 2004-2015 The OpenLDAP Foundation.
+ * Copyright 2004-2018 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@@ -28,7 +28,9 @@
#include "config.h"
#include "ldap_rq.h"
+#ifdef LDAP_DEVEL
#define CHECK_CSN 1
+#endif
/* A modify request on a particular entry */
typedef struct modinst {
@@ -87,6 +89,7 @@ typedef struct syncops {
int s_inuse; /* reference count */
struct syncres *s_res;
struct syncres *s_restail;
+ void *s_pool_cookie;
ldap_pvt_thread_mutex_t s_mutex;
} syncops;
@@ -128,6 +131,7 @@ typedef struct sessionlog {
int sl_numcsns;
int sl_num;
int sl_size;
+ int sl_playing;
slog_entry *sl_head;
slog_entry *sl_tail;
ldap_pvt_thread_mutex_t sl_mutex;
@@ -792,20 +796,25 @@ static void free_resinfo( syncres *sr )
}
}
+#define FS_UNLINK 1
+#define FS_LOCK 2
+
static int
-syncprov_free_syncop( syncops *so, int unlink )
+syncprov_free_syncop( syncops *so, int flags )
{
syncres *sr, *srnext;
GroupAssertion *ga, *gnext;
- ldap_pvt_thread_mutex_lock( &so->s_mutex );
+ if ( flags & FS_LOCK )
+ ldap_pvt_thread_mutex_lock( &so->s_mutex );
/* already being freed, or still in use */
if ( !so->s_inuse || --so->s_inuse > 0 ) {
- ldap_pvt_thread_mutex_unlock( &so->s_mutex );
+ if ( flags & FS_LOCK )
+ ldap_pvt_thread_mutex_unlock( &so->s_mutex );
return 0;
}
ldap_pvt_thread_mutex_unlock( &so->s_mutex );
- if ( unlink ) {
+ if (( flags & FS_UNLINK ) && so->s_si ) {
syncops **sop;
ldap_pvt_thread_mutex_lock( &so->s_si->si_ops_mutex );
for ( sop = &so->s_si->si_ops; *sop; sop = &(*sop)->s_next ) {
@@ -915,7 +924,6 @@ syncprov_qstart( syncops *so );
static int
syncprov_qplay( Operation *op, syncops *so )
{
- slap_overinst *on = LDAP_SLIST_FIRST(&so->s_op->o_extra)->oe_key;
syncres *sr;
int rc = 0;
@@ -961,11 +969,8 @@ syncprov_qplay( Operation *op, syncops *so )
if ( rc == 0 && so->s_res ) {
syncprov_qstart( so );
- } else {
- so->s_flags ^= PS_TASK_QUEUED;
}
- ldap_pvt_thread_mutex_unlock( &so->s_mutex );
return rc;
}
@@ -1001,8 +1006,17 @@ syncprov_qtask( void *ctx, void *arg )
rc = syncprov_qplay( op, so );
+ /* if an error occurred, or no responses left, task is no longer queued */
+ if ( !rc && !so->s_res )
+ rc = 1;
+
/* decrement use count... */
- syncprov_free_syncop( so, 1 );
+ if ( !syncprov_free_syncop( so, FS_UNLINK )) {
+ if ( rc )
+ /* if we didn't unlink, and task is no longer queued, clear flag */
+ so->s_flags ^= PS_TASK_QUEUED;
+ ldap_pvt_thread_mutex_unlock( &so->s_mutex );
+ }
return NULL;
}
@@ -1013,8 +1027,8 @@ syncprov_qstart( syncops *so )
{
so->s_flags |= PS_TASK_QUEUED;
so->s_inuse++;
- ldap_pvt_thread_pool_submit( &connection_pool,
- syncprov_qtask, so );
+ ldap_pvt_thread_pool_submit2( &connection_pool,
+ syncprov_qtask, so, &so->s_pool_cookie );
}
/* Queue a persistent search response */
@@ -1129,7 +1143,7 @@ syncprov_drop_psearch( syncops *so, int lock )
if ( lock )
ldap_pvt_thread_mutex_unlock( &so->s_op->o_conn->c_mutex );
}
- return syncprov_free_syncop( so, 0 );
+ return syncprov_free_syncop( so, FS_LOCK );
}
static int
@@ -1362,7 +1376,7 @@ syncprov_matchops( Operation *op, opcookie *opc, int saveit )
* with saveit == TRUE
*/
snext = ss->s_next;
- if ( syncprov_free_syncop( ss, 0 ) ) {
+ if ( syncprov_free_syncop( ss, FS_LOCK ) ) {
*pss = snext;
gonext = 0;
}
@@ -1407,7 +1421,7 @@ syncprov_op_cleanup( Operation *op, SlapReply *rs )
for (sm = opc->smatches; sm; sm=snext) {
snext = sm->sm_next;
- syncprov_free_syncop( sm->sm_op, 1 );
+ syncprov_free_syncop( sm->sm_op, FS_LOCK|FS_UNLINK );
op->o_tmpfree( sm, op->o_tmpmemctx );
}
@@ -1492,6 +1506,8 @@ syncprov_checkpoint( Operation *op, slap_overinst *on )
opm.o_bd->bd_info = on->on_info->oi_orig;
opm.o_managedsait = SLAP_CONTROL_NONCRITICAL;
opm.o_no_schema_check = 1;
+ opm.o_dont_replicate = 1;
+ opm.o_opid = -1;
opm.o_bd->be_modify( &opm, &rsm );
if ( rsm.sr_err == LDAP_NO_SUCH_OBJECT &&
@@ -1537,18 +1553,21 @@ syncprov_add_slog( Operation *op )
* wipe out anything in the log if we see them.
*/
ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
+ /* can only do this if no one else is reading the log at the moment */
+ if (!sl->sl_playing) {
while ( se = sl->sl_head ) {
sl->sl_head = se->se_next;
ch_free( se );
}
sl->sl_tail = NULL;
sl->sl_num = 0;
+ }
ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
return;
}
/* Allocate a record. UUIDs are not NUL-terminated. */
- se = ch_malloc( sizeof( slog_entry ) + opc->suuid.bv_len +
+ se = ch_malloc( sizeof( slog_entry ) + opc->suuid.bv_len +
op->o_csn.bv_len + 1 );
se->se_next = NULL;
se->se_tag = op->o_tag;
@@ -1593,8 +1612,9 @@ syncprov_add_slog( Operation *op )
}
}
sl->sl_num++;
+ if (!sl->sl_playing) {
while ( sl->sl_num > sl->sl_size ) {
- int i, j;
+ int i;
se = sl->sl_head;
sl->sl_head = se->se_next;
for ( i=0; isl_numcsns; i++ )
@@ -1609,6 +1629,7 @@ syncprov_add_slog( Operation *op )
ch_free( se );
sl->sl_num--;
}
+ }
ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
}
}
@@ -1643,6 +1664,8 @@ syncprov_playlog( Operation *op, SlapReply *rs, sessionlog *sl,
num = sl->sl_num;
i = 0;
nmods = 0;
+ sl->sl_playing++;
+ ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
uuids = op->o_tmpalloc( (num+1) * sizeof( struct berval ) +
num * UUID_LEN, op->o_tmpmemctx );
@@ -1699,6 +1722,8 @@ syncprov_playlog( Operation *op, SlapReply *rs, sessionlog *sl,
AC_MEMCPY(uuids[j].bv_val, se->se_uuid.bv_val, UUID_LEN);
uuids[j].bv_len = UUID_LEN;
}
+ ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
+ sl->sl_playing--;
ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
ndel = i;
@@ -1797,6 +1822,55 @@ syncprov_playlog( Operation *op, SlapReply *rs, sessionlog *sl,
op->o_tmpfree( uuids, op->o_tmpmemctx );
}
+static int
+syncprov_new_ctxcsn( opcookie *opc, syncprov_info_t *si, int csn_changed, int numvals, BerVarray vals )
+{
+ unsigned i;
+ int j, sid;
+
+ for ( i=0; isi_numcsns; j++ ) {
+ if ( sid < si->si_sids[j] )
+ break;
+ if ( sid == si->si_sids[j] ) {
+ if ( ber_bvcmp( &vals[i], &si->si_ctxcsn[j] ) > 0 ) {
+ ber_bvreplace( &si->si_ctxcsn[j], &vals[i] );
+ csn_changed = 1;
+ }
+ break;
+ }
+ }
+
+ if ( j == si->si_numcsns || sid != si->si_sids[j] ) {
+ slap_insert_csn_sids( (struct sync_cookie *)&si->si_ctxcsn,
+ j, sid, &vals[i] );
+ csn_changed = 1;
+ }
+ }
+ if ( csn_changed )
+ si->si_dirty = 0;
+ ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
+
+ if ( csn_changed ) {
+ syncops *ss;
+ ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
+ for ( ss = si->si_ops; ss; ss = ss->s_next ) {
+ if ( ss->s_op->o_abandon )
+ continue;
+ /* Send the updated csn to all syncrepl consumers,
+ * including the server from which it originated.
+ * The syncrepl consumer and syncprov provider on
+ * the originating server may be configured to store
+ * their csn values in different entries.
+ */
+ syncprov_qresp( opc, ss, LDAP_SYNC_NEW_COOKIE );
+ }
+ ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
+ }
+ return csn_changed;
+}
+
static int
syncprov_op_response( Operation *op, SlapReply *rs )
{
@@ -1860,66 +1934,40 @@ syncprov_op_response( Operation *op, SlapReply *rs )
}
/* Don't do any processing for consumer contextCSN updates */
- if ( op->o_dont_replicate ) {
- if ( op->o_tag == LDAP_REQ_MODIFY &&
- op->orm_modlist->sml_op == LDAP_MOD_REPLACE &&
- op->orm_modlist->sml_desc == slap_schema.si_ad_contextCSN ) {
+ if ( SLAPD_SYNC_IS_SYNCCONN( op->o_connid ) &&
+ op->o_tag == LDAP_REQ_MODIFY &&
+ op->orm_modlist &&
+ op->orm_modlist->sml_op == LDAP_MOD_REPLACE &&
+ op->orm_modlist->sml_desc == slap_schema.si_ad_contextCSN ) {
/* Catch contextCSN updates from syncrepl. We have to look at
* all the attribute values, as there may be more than one csn
* that changed, and only one can be passed in the csn queue.
*/
- Modifications *mod = op->orm_modlist;
- unsigned i;
- int j, sid;
-
- for ( i=0; isml_numvals; i++ ) {
- sid = slap_parse_csn_sid( &mod->sml_values[i] );
- for ( j=0; jsi_numcsns; j++ ) {
- if ( sid < si->si_sids[j] )
- break;
- if ( sid == si->si_sids[j] ) {
- if ( ber_bvcmp( &mod->sml_values[i], &si->si_ctxcsn[j] ) > 0 ) {
- ber_bvreplace( &si->si_ctxcsn[j], &mod->sml_values[i] );
- csn_changed = 1;
- }
- break;
- }
- }
-
- if ( j == si->si_numcsns || sid != si->si_sids[j] ) {
- slap_insert_csn_sids( (struct sync_cookie *)&si->si_ctxcsn,
- j, sid, &mod->sml_values[i] );
- csn_changed = 1;
- }
- }
+ csn_changed = syncprov_new_ctxcsn( opc, si, csn_changed,
+ op->orm_modlist->sml_numvals, op->orm_modlist->sml_values );
if ( csn_changed )
- si->si_dirty = 0;
- ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
-
- if ( csn_changed ) {
- syncops *ss;
- ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
- for ( ss = si->si_ops; ss; ss = ss->s_next ) {
- if ( ss->s_op->o_abandon )
- continue;
- /* Send the updated csn to all syncrepl consumers,
- * including the server from which it originated.
- * The syncrepl consumer and syncprov provider on
- * the originating server may be configured to store
- * their csn values in different entries.
- */
- syncprov_qresp( opc, ss, LDAP_SYNC_NEW_COOKIE );
- }
- ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
- }
- } else {
- ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
- }
+ si->si_numops++;
+ goto leave;
+ }
+ if ( op->o_dont_replicate ) {
if ( csn_changed )
si->si_numops++;
+ ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
goto leave;
}
+ /* If we're adding the context entry, parse all of its contextCSNs */
+ if ( op->o_tag == LDAP_REQ_ADD &&
+ dn_match( &op->o_req_ndn, &si->si_contextdn )) {
+ Attribute *a = attr_find( op->ora_e->e_attrs, slap_schema.si_ad_contextCSN );
+ if ( a ) {
+ csn_changed = syncprov_new_ctxcsn( opc, si, csn_changed, a->a_numvals, a->a_vals );
+ if ( csn_changed )
+ si->si_numops++;
+ goto added;
+ }
+ }
+
if ( csn_changed )
si->si_numops++;
if ( si->si_chkops || si->si_chktime ) {
@@ -1946,6 +1994,7 @@ syncprov_op_response( Operation *op, SlapReply *rs )
si->si_dirty = !csn_changed;
ldap_pvt_thread_rdwr_wunlock( &si->si_csn_rwlock );
+added:
if ( do_check ) {
ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
syncprov_checkpoint( op, on );
@@ -1978,6 +2027,8 @@ syncprov_op_response( Operation *op, SlapReply *rs )
continue;
syncprov_qresp( opc, sm->sm_op, LDAP_SYNC_DELETE );
}
+ if ( opc->ssres.s_info )
+ free_resinfo( &opc->ssres );
break;
}
}
@@ -2351,14 +2402,6 @@ syncprov_search_response( Operation *op, SlapReply *rs )
int i, sid;
sid = slap_parse_csn_sid( &a->a_nvals[0] );
- /* Don't send changed entries back to the originator */
- if ( sid == srs->sr_state.sid && srs->sr_state.numcsns ) {
- Debug( LDAP_DEBUG_SYNC,
- "Entry %s changed by peer, ignored\n",
- rs->sr_entry->e_name.bv_val, 0, 0 );
- return LDAP_SUCCESS;
- }
-
/* If not a persistent search */
if ( !ss->ss_so ) {
/* Make sure entry is less than the snapshot'd contextCSN */
@@ -2432,7 +2475,7 @@ syncprov_search_response( Operation *op, SlapReply *rs )
} else {
/* It's RefreshAndPersist, transition to Persist phase */
syncprov_sendinfo( op, rs, ( ss->ss_flags & SS_PRESENT ) ?
- LDAP_TAG_SYNC_REFRESH_PRESENT : LDAP_TAG_SYNC_REFRESH_DELETE,
+ LDAP_TAG_SYNC_REFRESH_PRESENT : LDAP_TAG_SYNC_REFRESH_DELETE,
( ss->ss_flags & SS_CHANGED ) ? &cookie : NULL,
1, NULL, 0 );
if ( !BER_BVISNULL( &cookie ))
@@ -2492,28 +2535,6 @@ syncprov_op_search( Operation *op, SlapReply *rs )
return rs->sr_err;
}
- /* snapshot the ctxcsn */
- ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
- numcsns = si->si_numcsns;
- if ( numcsns ) {
- ber_bvarray_dup_x( &ctxcsn, si->si_ctxcsn, op->o_tmpmemctx );
- sids = op->o_tmpalloc( numcsns * sizeof(int), op->o_tmpmemctx );
- for ( i=0; isi_sids[i];
- } else {
- ctxcsn = NULL;
- sids = NULL;
- }
- dirty = si->si_dirty;
- ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
-
- /* We know nothing - do nothing */
- if ( !numcsns ) {
- rs->sr_err = LDAP_SUCCESS;
- send_ldap_result( op, rs );
- return rs->sr_err;
- }
-
srs = op->o_controls[slap_cids.sc_LDAPsync];
/* If this is a persistent search, set it up right away */
@@ -2521,7 +2542,7 @@ syncprov_op_search( Operation *op, SlapReply *rs )
syncops so = {0};
fbase_cookie fc;
opcookie opc;
- slap_callback sc;
+ slap_callback sc = {0};
fc.fss = &so;
fc.fbase = 0;
@@ -2544,7 +2565,6 @@ syncprov_op_search( Operation *op, SlapReply *rs )
}
sop = ch_malloc( sizeof( syncops ));
*sop = so;
- ldap_pvt_thread_mutex_init( &sop->s_mutex );
sop->s_rid = srs->sr_state.rid;
sop->s_sid = srs->sr_state.sid;
/* set refcount=2 to prevent being freed out from under us
@@ -2569,22 +2589,47 @@ syncprov_op_search( Operation *op, SlapReply *rs )
ldap_pvt_thread_yield();
ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
}
+ if ( op->o_abandon ) {
+ ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
+ ch_free( sop );
+ return SLAPD_ABANDON;
+ }
+ ldap_pvt_thread_mutex_init( &sop->s_mutex );
sop->s_next = si->si_ops;
sop->s_si = si;
si->si_ops = sop;
ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
}
+ /* snapshot the ctxcsn
+ * Note: this must not be done before the psearch setup. (ITS#8365)
+ */
+ ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock );
+ numcsns = si->si_numcsns;
+ if ( numcsns ) {
+ ber_bvarray_dup_x( &ctxcsn, si->si_ctxcsn, op->o_tmpmemctx );
+ sids = op->o_tmpalloc( numcsns * sizeof(int), op->o_tmpmemctx );
+ for ( i=0; isi_sids[i];
+ } else {
+ ctxcsn = NULL;
+ sids = NULL;
+ }
+ dirty = si->si_dirty;
+ ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock );
+
/* If we have a cookie, handle the PRESENT lookups */
if ( srs->sr_state.ctxcsn ) {
sessionlog *sl;
int i, j;
- /* If we don't have any CSN of our own yet, pretend nothing
- * has changed.
+ /* If we don't have any CSN of our own yet, bail out.
*/
- if ( !numcsns )
- goto no_change;
+ if ( !numcsns ) {
+ rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
+ rs->sr_text = "consumer has state info but provider doesn't!";
+ goto bailout;
+ }
if ( !si->si_nopres )
do_present = SS_PRESENT;
@@ -2650,6 +2695,10 @@ syncprov_op_search( Operation *op, SlapReply *rs )
/* our state is older, complain to consumer */
rs->sr_err = LDAP_UNWILLING_TO_PERFORM;
rs->sr_text = "consumer state is newer than provider!";
+ Log4( LDAP_DEBUG_SYNC, ldap_syslog_level,
+ "consumer %d state %s is newer than provider %d state %s\n",
+ sids[i], srs->sr_state.ctxcsn[i].bv_val, sids[j], /* == slap_serverID */
+ ctxcsn[j].bv_val);
bailout:
if ( sop ) {
syncops **sp = &si->si_ops;
@@ -2665,7 +2714,7 @@ bailout:
send_ldap_result( op, rs );
return rs->sr_err;
}
- }
+ }
if ( BER_BVISEMPTY( &mincsn )) {
mincsn = maxcsn;
minsid = maxsid;
@@ -2674,7 +2723,7 @@ bailout:
/* If nothing has changed, shortcut it */
if ( !changed && !dirty ) {
do_present = 0;
-no_change: if ( !(op->o_sync_mode & SLAP_SYNC_PERSIST) ) {
+no_change: if ( !(op->o_sync_mode & SLAP_SYNC_PERSIST) ) {
LDAPControl *ctrls[2];
ctrls[0] = NULL;
@@ -2761,6 +2810,9 @@ no_change: if ( !(op->o_sync_mode & SLAP_SYNC_PERSIST) ) {
}
}
} else {
+ /* The consumer knows nothing, we know nothing. OK. */
+ if (!numcsns)
+ goto no_change;
/* No consumer state, assume something has changed */
changed = SS_CHANGED;
}
@@ -3208,8 +3260,8 @@ syncprov_db_close(
ConfigReply *cr
)
{
- slap_overinst *on = (slap_overinst *) be->bd_info;
- syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
+ slap_overinst *on = (slap_overinst *) be->bd_info;
+ syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
#ifdef SLAP_CONFIG_DELETE
syncops *so, *sonext;
#endif /* SLAP_CONFIG_DELETE */
@@ -3240,7 +3292,10 @@ syncprov_db_close(
rs.sr_err = LDAP_UNAVAILABLE;
send_ldap_result( so->s_op, &rs );
sonext=so->s_next;
- syncprov_drop_psearch( so, 0);
+ if ( so->s_flags & PS_TASK_QUEUED )
+ ldap_pvt_thread_pool_retract( so->s_pool_cookie );
+ if ( !syncprov_drop_psearch( so, 0 ))
+ so->s_si = NULL;
}
si->si_ops=NULL;
ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
@@ -3248,7 +3303,7 @@ syncprov_db_close(
overlay_unregister_control( be, LDAP_CONTROL_SYNC );
#endif /* SLAP_CONFIG_DELETE */
- return 0;
+ return 0;
}
static int