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Diffstat (limited to 'servers/slapd/overlays/syncprov.c')
| -rw-r--r-- | servers/slapd/overlays/syncprov.c | 3717 |
1 files changed, 3717 insertions, 0 deletions
diff --git a/servers/slapd/overlays/syncprov.c b/servers/slapd/overlays/syncprov.c new file mode 100644 index 0000000..60d196e --- /dev/null +++ b/servers/slapd/overlays/syncprov.c @@ -0,0 +1,3717 @@ +/* $OpenLDAP$ */ +/* syncprov.c - syncrepl provider */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 2004-2021 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ +/* ACKNOWLEDGEMENTS: + * This work was initially developed by Howard Chu for inclusion in + * OpenLDAP Software. + */ + +#include "portable.h" + +#ifdef SLAPD_OVER_SYNCPROV + +#include <ac/string.h> +#include "lutil.h" +#include "slap.h" +#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 { + struct modinst *mi_next; + Operation *mi_op; +} modinst; + +typedef struct modtarget { + struct modinst *mt_mods; + struct modinst *mt_tail; + struct berval mt_dn; + ldap_pvt_thread_mutex_t mt_mutex; +} modtarget; + +/* All the info of a psearch result that's shared between + * multiple queues + */ +typedef struct resinfo { + struct syncres *ri_list; + Entry *ri_e; + struct berval ri_dn; + struct berval ri_ndn; + struct berval ri_uuid; + struct berval ri_csn; + struct berval ri_cookie; + char ri_isref; + ldap_pvt_thread_mutex_t ri_mutex; +} resinfo; + +/* A queued result of a persistent search */ +typedef struct syncres { + struct syncres *s_next; /* list of results on this psearch queue */ + struct syncres *s_rilist; /* list of psearches using this result */ + resinfo *s_info; + char s_mode; +} syncres; + +/* Record of a persistent search */ +typedef struct syncops { + struct syncops *s_next; + struct syncprov_info_t *s_si; + struct berval s_base; /* ndn of search base */ + ID s_eid; /* entryID of search base */ + Operation *s_op; /* search op */ + int s_rid; + int s_sid; + struct berval s_filterstr; + int s_flags; /* search status */ +#define PS_IS_REFRESHING 0x01 +#define PS_IS_DETACHED 0x02 +#define PS_WROTE_BASE 0x04 +#define PS_FIND_BASE 0x08 +#define PS_FIX_FILTER 0x10 +#define PS_TASK_QUEUED 0x20 + + int s_inuse; /* reference count */ + struct syncres *s_res; + struct syncres *s_restail; + ldap_pvt_thread_mutex_t s_mutex; +} syncops; + +/* A received sync control */ +typedef struct sync_control { + struct sync_cookie sr_state; + int sr_rhint; +} sync_control; + +#if 0 /* moved back to slap.h */ +#define o_sync o_ctrlflag[slap_cids.sc_LDAPsync] +#endif +/* o_sync_mode uses data bits of o_sync */ +#define o_sync_mode o_ctrlflag[slap_cids.sc_LDAPsync] + +#define SLAP_SYNC_NONE (LDAP_SYNC_NONE<<SLAP_CONTROL_SHIFT) +#define SLAP_SYNC_REFRESH (LDAP_SYNC_REFRESH_ONLY<<SLAP_CONTROL_SHIFT) +#define SLAP_SYNC_PERSIST (LDAP_SYNC_RESERVED<<SLAP_CONTROL_SHIFT) +#define SLAP_SYNC_REFRESH_AND_PERSIST (LDAP_SYNC_REFRESH_AND_PERSIST<<SLAP_CONTROL_SHIFT) + +/* Record of which searches matched at premodify step */ +typedef struct syncmatches { + struct syncmatches *sm_next; + syncops *sm_op; +} syncmatches; + +/* Session log data */ +typedef struct slog_entry { + struct berval se_uuid; + struct berval se_csn; + int se_sid; + ber_tag_t se_tag; +} slog_entry; + +typedef struct sessionlog { + BerVarray sl_mincsn; + int *sl_sids; + int sl_numcsns; + int sl_num; + int sl_size; + int sl_playing; + Avlnode *sl_entries; + ldap_pvt_thread_rdwr_t sl_mutex; +} sessionlog; + +/* The main state for this overlay */ +typedef struct syncprov_info_t { + syncops *si_ops; + struct berval si_contextdn; + BerVarray si_ctxcsn; /* ldapsync context */ + int *si_sids; + int si_numcsns; + int si_chkops; /* checkpointing info */ + int si_chktime; + int si_numops; /* number of ops since last checkpoint */ + int si_nopres; /* Skip present phase */ + int si_usehint; /* use reload hint */ + int si_active; /* True if there are active mods */ + int si_dirty; /* True if the context is dirty, i.e changes + * have been made without updating the csn. */ + time_t si_chklast; /* time of last checkpoint */ + Avlnode *si_mods; /* entries being modified */ + sessionlog *si_logs; + ldap_pvt_thread_rdwr_t si_csn_rwlock; + ldap_pvt_thread_mutex_t si_ops_mutex; + ldap_pvt_thread_mutex_t si_mods_mutex; + ldap_pvt_thread_mutex_t si_resp_mutex; +} syncprov_info_t; + +typedef struct opcookie { + slap_overinst *son; + syncmatches *smatches; + modtarget *smt; + Entry *se; + struct berval sdn; /* DN of entry, for deletes */ + struct berval sndn; + struct berval suuid; /* UUID of entry */ + struct berval sctxcsn; + short osid; /* sid of op csn */ + short rsid; /* sid of relay */ + short sreference; /* Is the entry a reference? */ + syncres ssres; +} opcookie; + +typedef struct fbase_cookie { + struct berval *fdn; /* DN of a modified entry, for scope testing */ + syncops *fss; /* persistent search we're testing against */ + int fbase; /* if TRUE we found the search base and it's still valid */ + int fscope; /* if TRUE then fdn is within the psearch scope */ +} fbase_cookie; + +static AttributeName csn_anlist[3]; +static AttributeName uuid_anlist[2]; + +/* Build a LDAPsync intermediate state control */ +static int +syncprov_state_ctrl( + Operation *op, + SlapReply *rs, + Entry *e, + int entry_sync_state, + LDAPControl **ctrls, + int num_ctrls, + int send_cookie, + struct berval *cookie ) +{ + Attribute* a; + int ret; + + BerElementBuffer berbuf; + BerElement *ber = (BerElement *)&berbuf; + LDAPControl *cp; + struct berval bv; + struct berval entryuuid_bv = BER_BVNULL; + + ber_init2( ber, 0, LBER_USE_DER ); + ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx ); + + for ( a = e->e_attrs; a != NULL; a = a->a_next ) { + AttributeDescription *desc = a->a_desc; + if ( desc == slap_schema.si_ad_entryUUID ) { + entryuuid_bv = a->a_nvals[0]; + break; + } + } + + /* FIXME: what if entryuuid is NULL or empty ? */ + + if ( send_cookie && cookie ) { + ber_printf( ber, "{eOON}", + entry_sync_state, &entryuuid_bv, cookie ); + } else { + ber_printf( ber, "{eON}", + entry_sync_state, &entryuuid_bv ); + } + + ret = ber_flatten2( ber, &bv, 0 ); + if ( ret == 0 ) { + cp = op->o_tmpalloc( sizeof( LDAPControl ) + bv.bv_len, op->o_tmpmemctx ); + cp->ldctl_oid = LDAP_CONTROL_SYNC_STATE; + cp->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL); + cp->ldctl_value.bv_val = (char *)&cp[1]; + cp->ldctl_value.bv_len = bv.bv_len; + AC_MEMCPY( cp->ldctl_value.bv_val, bv.bv_val, bv.bv_len ); + ctrls[num_ctrls] = cp; + } + ber_free_buf( ber ); + + if ( ret < 0 ) { + Debug( LDAP_DEBUG_TRACE, + "slap_build_sync_ctrl: ber_flatten2 failed (%d)\n", + ret, 0, 0 ); + send_ldap_error( op, rs, LDAP_OTHER, "internal error" ); + return LDAP_OTHER; + } + + return LDAP_SUCCESS; +} + +/* Build a LDAPsync final state control */ +static int +syncprov_done_ctrl( + Operation *op, + SlapReply *rs, + LDAPControl **ctrls, + int num_ctrls, + int send_cookie, + struct berval *cookie, + int refreshDeletes ) +{ + int ret; + BerElementBuffer berbuf; + BerElement *ber = (BerElement *)&berbuf; + LDAPControl *cp; + struct berval bv; + + ber_init2( ber, NULL, LBER_USE_DER ); + ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx ); + + ber_printf( ber, "{" ); + if ( send_cookie && cookie ) { + ber_printf( ber, "O", cookie ); + } + if ( refreshDeletes == LDAP_SYNC_REFRESH_DELETES ) { + ber_printf( ber, "b", refreshDeletes ); + } + ber_printf( ber, "N}" ); + + ret = ber_flatten2( ber, &bv, 0 ); + if ( ret == 0 ) { + cp = op->o_tmpalloc( sizeof( LDAPControl ) + bv.bv_len, op->o_tmpmemctx ); + cp->ldctl_oid = LDAP_CONTROL_SYNC_DONE; + cp->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL); + cp->ldctl_value.bv_val = (char *)&cp[1]; + cp->ldctl_value.bv_len = bv.bv_len; + AC_MEMCPY( cp->ldctl_value.bv_val, bv.bv_val, bv.bv_len ); + ctrls[num_ctrls] = cp; + } + + ber_free_buf( ber ); + + if ( ret < 0 ) { + Debug( LDAP_DEBUG_TRACE, + "syncprov_done_ctrl: ber_flatten2 failed (%d)\n", + ret, 0, 0 ); + send_ldap_error( op, rs, LDAP_OTHER, "internal error" ); + return LDAP_OTHER; + } + + return LDAP_SUCCESS; +} + +static int +syncprov_sendinfo( + Operation *op, + SlapReply *rs, + int type, + struct berval *cookie, + int refreshDone, + BerVarray syncUUIDs, + int refreshDeletes ) +{ + BerElementBuffer berbuf; + BerElement *ber = (BerElement *)&berbuf; + struct berval rspdata; + + int ret; + + ber_init2( ber, NULL, LBER_USE_DER ); + ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx ); + + if ( type ) { + switch ( type ) { + case LDAP_TAG_SYNC_NEW_COOKIE: + Debug( LDAP_DEBUG_SYNC, "%s syncprov_sendinfo: " + "sending a new cookie=%s\n", + op->o_log_prefix, cookie->bv_val, 0 ); + ber_printf( ber, "tO", type, cookie ); + break; + case LDAP_TAG_SYNC_REFRESH_DELETE: + case LDAP_TAG_SYNC_REFRESH_PRESENT: + Debug( LDAP_DEBUG_SYNC, "%s syncprov_sendinfo: " + "%s cookie=%s\n", + op->o_log_prefix, + type == LDAP_TAG_SYNC_REFRESH_DELETE ? "refreshDelete" : "refreshPresent", + cookie ? cookie->bv_val : "" ); + ber_printf( ber, "t{", type ); + if ( cookie ) { + ber_printf( ber, "O", cookie ); + } + if ( refreshDone == 0 ) { + ber_printf( ber, "b", refreshDone ); + } + ber_printf( ber, "N}" ); + break; + case LDAP_TAG_SYNC_ID_SET: + Debug( LDAP_DEBUG_SYNC, "%s syncprov_sendinfo: " + "%s syncIdSet cookie=%s\n", + op->o_log_prefix, refreshDeletes ? "delete" : "present", + cookie ? cookie->bv_val : "" ); + ber_printf( ber, "t{", type ); + if ( cookie ) { + ber_printf( ber, "O", cookie ); + } + if ( refreshDeletes == 1 ) { + ber_printf( ber, "b", refreshDeletes ); + } + ber_printf( ber, "[W]", syncUUIDs ); + ber_printf( ber, "N}" ); + break; + default: + Debug( LDAP_DEBUG_TRACE, + "%s syncprov_sendinfo: invalid syncinfo type (%d)\n", + op->o_log_prefix, type, 0 ); + return LDAP_OTHER; + } + } + + ret = ber_flatten2( ber, &rspdata, 0 ); + + if ( ret < 0 ) { + Debug( LDAP_DEBUG_TRACE, + "syncprov_sendinfo: ber_flatten2 failed (%d)\n", + ret, 0, 0 ); + send_ldap_error( op, rs, LDAP_OTHER, "internal error" ); + return LDAP_OTHER; + } + + rs->sr_rspoid = LDAP_SYNC_INFO; + rs->sr_rspdata = &rspdata; + send_ldap_intermediate( op, rs ); + rs->sr_rspdata = NULL; + ber_free_buf( ber ); + + return LDAP_SUCCESS; +} + +/* Find a modtarget in an AVL tree */ +static int +sp_avl_cmp( const void *c1, const void *c2 ) +{ + const modtarget *m1, *m2; + int rc; + + m1 = c1; m2 = c2; + rc = m1->mt_dn.bv_len - m2->mt_dn.bv_len; + + if ( rc ) return rc; + return ber_bvcmp( &m1->mt_dn, &m2->mt_dn ); +} + +static int +syncprov_sessionlog_cmp( const void *l, const void *r ) +{ + const slog_entry *left = l, *right = r; + int ret = ber_bvcmp( &left->se_csn, &right->se_csn ); + if ( !ret ) + ret = ber_bvcmp( &left->se_uuid, &right->se_uuid ); + /* Only time we have two modifications with same CSN is when we detect a + * rename during replication. + * We invert the test here because LDAP_REQ_MODDN is + * numerically greater than LDAP_REQ_MODIFY but we + * want it to occur first. + */ + if ( !ret ) + ret = right->se_tag - left->se_tag; + + return ret; +} + +/* syncprov_findbase: + * finds the true DN of the base of a search (with alias dereferencing) and + * checks to make sure the base entry doesn't get replaced with a different + * entry (e.g., swapping trees via ModDN, or retargeting an alias). If a + * change is detected, any persistent search on this base must be terminated / + * reloaded. + * On the first call, we just save the DN and entryID. On subsequent calls + * we compare the DN and entryID with the saved values. + */ +static int +findbase_cb( Operation *op, SlapReply *rs ) +{ + slap_callback *sc = op->o_callback; + + if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) { + fbase_cookie *fc = sc->sc_private; + + /* If no entryID, we're looking for the first time. + * Just store whatever we got. + */ + if ( fc->fss->s_eid == NOID ) { + fc->fbase = 2; + fc->fss->s_eid = rs->sr_entry->e_id; + ber_dupbv( &fc->fss->s_base, &rs->sr_entry->e_nname ); + + } else if ( rs->sr_entry->e_id == fc->fss->s_eid && + dn_match( &rs->sr_entry->e_nname, &fc->fss->s_base )) { + + /* OK, the DN is the same and the entryID is the same. */ + fc->fbase = 1; + } + } + if ( rs->sr_err != LDAP_SUCCESS ) { + Debug( LDAP_DEBUG_ANY, "findbase failed! %d\n", rs->sr_err,0,0 ); + } + return LDAP_SUCCESS; +} + +static Filter generic_filter = { LDAP_FILTER_PRESENT, { 0 }, NULL }; +static struct berval generic_filterstr = BER_BVC("(objectclass=*)"); + +static int +syncprov_findbase( Operation *op, fbase_cookie *fc ) +{ + /* Use basic parameters from syncrepl search, but use + * current op's threadctx / tmpmemctx + */ + ldap_pvt_thread_mutex_lock( &fc->fss->s_mutex ); + if ( fc->fss->s_flags & PS_FIND_BASE ) { + slap_callback cb = {0}; + Operation fop; + SlapReply frs = { REP_RESULT }; + int rc; + + fc->fss->s_flags ^= PS_FIND_BASE; + ldap_pvt_thread_mutex_unlock( &fc->fss->s_mutex ); + + fop = *fc->fss->s_op; + + fop.o_bd = fop.o_bd->bd_self; + fop.o_hdr = op->o_hdr; + fop.o_time = op->o_time; + fop.o_tincr = op->o_tincr; + fop.o_extra = op->o_extra; + + cb.sc_response = findbase_cb; + cb.sc_private = fc; + + fop.o_sync_mode = 0; /* turn off sync mode */ + fop.o_managedsait = SLAP_CONTROL_CRITICAL; + fop.o_callback = &cb; + fop.o_tag = LDAP_REQ_SEARCH; + fop.ors_scope = LDAP_SCOPE_BASE; + fop.ors_limit = NULL; + fop.ors_slimit = 1; + fop.ors_tlimit = SLAP_NO_LIMIT; + fop.ors_attrs = slap_anlist_no_attrs; + fop.ors_attrsonly = 1; + fop.ors_filter = &generic_filter; + fop.ors_filterstr = generic_filterstr; + + Debug( LDAP_DEBUG_SYNC, "%s syncprov_findbase: searching\n", op->o_log_prefix, 0, 0 ); + rc = fop.o_bd->be_search( &fop, &frs ); + } else { + ldap_pvt_thread_mutex_unlock( &fc->fss->s_mutex ); + fc->fbase = 1; + } + + /* After the first call, see if the fdn resides in the scope */ + if ( fc->fbase == 1 ) { + switch ( fc->fss->s_op->ors_scope ) { + case LDAP_SCOPE_BASE: + fc->fscope = dn_match( fc->fdn, &fc->fss->s_base ); + break; + case LDAP_SCOPE_ONELEVEL: { + struct berval pdn; + dnParent( fc->fdn, &pdn ); + fc->fscope = dn_match( &pdn, &fc->fss->s_base ); + break; } + case LDAP_SCOPE_SUBTREE: + fc->fscope = dnIsSuffix( fc->fdn, &fc->fss->s_base ); + break; + case LDAP_SCOPE_SUBORDINATE: + fc->fscope = dnIsSuffix( fc->fdn, &fc->fss->s_base ) && + !dn_match( fc->fdn, &fc->fss->s_base ); + break; + } + } + + if ( fc->fbase ) + return LDAP_SUCCESS; + + /* If entryID has changed, then the base of this search has + * changed. Invalidate the psearch. + */ + return LDAP_NO_SUCH_OBJECT; +} + +/* syncprov_findcsn: + * This function has three different purposes, but they all use a search + * that filters on entryCSN so they're combined here. + * 1: at startup time, after a contextCSN has been read from the database, + * we search for all entries with CSN >= contextCSN in case the contextCSN + * was not checkpointed at the previous shutdown. + * + * 2: when the current contextCSN is known and we have a sync cookie, we search + * for one entry with CSN = the cookie CSN. If not found, try <= cookie CSN. + * If an entry is found, the cookie CSN is valid, otherwise it is stale. + * + * 3: during a refresh phase, we search for all entries with CSN <= the cookie + * CSN, and generate Present records for them. We always collect this result + * in SyncID sets, even if there's only one match. + */ +typedef enum find_csn_t { + FIND_MAXCSN = 1, + FIND_CSN = 2, + FIND_PRESENT = 3 +} find_csn_t; + +static int +findmax_cb( Operation *op, SlapReply *rs ) +{ + if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) { + struct berval *maxcsn = op->o_callback->sc_private; + Attribute *a = attr_find( rs->sr_entry->e_attrs, + slap_schema.si_ad_entryCSN ); + + if ( a && ber_bvcmp( &a->a_vals[0], maxcsn ) > 0 && + slap_parse_csn_sid( &a->a_vals[0] ) == slap_serverID ) { + maxcsn->bv_len = a->a_vals[0].bv_len; + strcpy( maxcsn->bv_val, a->a_vals[0].bv_val ); + } + } + return LDAP_SUCCESS; +} + +static int +findcsn_cb( Operation *op, SlapReply *rs ) +{ + slap_callback *sc = op->o_callback; + + /* We just want to know that at least one exists, so it's OK if + * we exceed the unchecked limit. + */ + if ( rs->sr_err == LDAP_ADMINLIMIT_EXCEEDED || + (rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS )) { + sc->sc_private = (void *)1; + } + return LDAP_SUCCESS; +} + +/* Build a list of entryUUIDs for sending in a SyncID set */ + +#define UUID_LEN 16 + +typedef struct fpres_cookie { + int num; + BerVarray uuids; + char *last; +} fpres_cookie; + +static int +findpres_cb( Operation *op, SlapReply *rs ) +{ + slap_callback *sc = op->o_callback; + fpres_cookie *pc = sc->sc_private; + Attribute *a; + int ret = SLAP_CB_CONTINUE; + + switch ( rs->sr_type ) { + case REP_SEARCH: + a = attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_entryUUID ); + if ( a ) { + pc->uuids[pc->num].bv_val = pc->last; + AC_MEMCPY( pc->uuids[pc->num].bv_val, a->a_nvals[0].bv_val, + pc->uuids[pc->num].bv_len ); + pc->num++; + pc->last = pc->uuids[pc->num].bv_val; + pc->uuids[pc->num].bv_val = NULL; + } + ret = LDAP_SUCCESS; + if ( pc->num != SLAP_SYNCUUID_SET_SIZE ) + break; + /* FALLTHRU */ + case REP_RESULT: + ret = rs->sr_err; + if ( pc->num ) { + ret = syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL, + 0, pc->uuids, 0 ); + pc->uuids[pc->num].bv_val = pc->last; + pc->num = 0; + pc->last = pc->uuids[0].bv_val; + } + break; + default: + break; + } + return ret; +} + +static int +syncprov_findcsn( Operation *op, find_csn_t mode, struct berval *csn ) +{ + slap_overinst *on = (slap_overinst *)op->o_bd->bd_info; + syncprov_info_t *si = on->on_bi.bi_private; + + slap_callback cb = {0}; + Operation fop; + SlapReply frs = { REP_RESULT }; + char buf[LDAP_PVT_CSNSTR_BUFSIZE + STRLENOF("(entryCSN<=)")]; + char cbuf[LDAP_PVT_CSNSTR_BUFSIZE]; + struct berval maxcsn; + Filter cf; + AttributeAssertion eq = ATTRIBUTEASSERTION_INIT; + fpres_cookie pcookie; + sync_control *srs = NULL; + struct slap_limits_set fc_limits; + int i, rc = LDAP_SUCCESS, findcsn_retry = 1; + int maxid; + + if ( mode != FIND_MAXCSN ) { + srs = op->o_controls[slap_cids.sc_LDAPsync]; + } + + Debug( LDAP_DEBUG_SYNC, "%s syncprov_findcsn: mode=%s csn=%s\n", + op->o_log_prefix, + mode == FIND_MAXCSN ? + "FIND_MAXCSN" : + mode == FIND_CSN ? + "FIND_CSN" : + "FIND_PRESENT", + csn ? csn->bv_val : "" ); + + fop = *op; + fop.o_sync_mode &= SLAP_CONTROL_MASK; /* turn off sync_mode */ + /* We want pure entries, not referrals */ + fop.o_managedsait = SLAP_CONTROL_CRITICAL; + + cf.f_ava = &eq; + cf.f_av_desc = slap_schema.si_ad_entryCSN; + BER_BVZERO( &cf.f_av_value ); + cf.f_next = NULL; + + fop.o_callback = &cb; + fop.ors_limit = NULL; + fop.ors_tlimit = SLAP_NO_LIMIT; + fop.ors_filter = &cf; + fop.ors_filterstr.bv_val = buf; + +again: + switch( mode ) { + case FIND_MAXCSN: + cf.f_choice = LDAP_FILTER_GE; + /* If there are multiple CSNs, use the one with our serverID */ + for ( i=0; i<si->si_numcsns; i++) { + if ( slap_serverID == si->si_sids[i] ) { + maxid = i; + break; + } + } + if ( i == si->si_numcsns ) { + /* No match: this is multimaster, and none of the content in the DB + * originated locally. Treat like no CSN. + */ + return LDAP_NO_SUCH_OBJECT; + } + cf.f_av_value = si->si_ctxcsn[maxid]; + fop.ors_filterstr.bv_len = snprintf( buf, sizeof( buf ), + "(entryCSN>=%s)", cf.f_av_value.bv_val ); + if ( fop.ors_filterstr.bv_len >= sizeof( buf ) ) { + return LDAP_OTHER; + } + fop.ors_attrsonly = 0; + fop.ors_attrs = csn_anlist; + fop.ors_slimit = SLAP_NO_LIMIT; + cb.sc_private = &maxcsn; + cb.sc_response = findmax_cb; + strcpy( cbuf, cf.f_av_value.bv_val ); + maxcsn.bv_val = cbuf; + maxcsn.bv_len = cf.f_av_value.bv_len; + break; + case FIND_CSN: + if ( BER_BVISEMPTY( &cf.f_av_value )) { + cf.f_av_value = *csn; + } + fop.o_dn = op->o_bd->be_rootdn; + fop.o_ndn = op->o_bd->be_rootndn; + fop.o_req_dn = op->o_bd->be_suffix[0]; + fop.o_req_ndn = op->o_bd->be_nsuffix[0]; + /* Look for exact match the first time */ + if ( findcsn_retry ) { + cf.f_choice = LDAP_FILTER_EQUALITY; + fop.ors_filterstr.bv_len = snprintf( buf, sizeof( buf ), + "(entryCSN=%s)", cf.f_av_value.bv_val ); + /* On retry, look for <= */ + } else { + cf.f_choice = LDAP_FILTER_LE; + fop.ors_limit = &fc_limits; + memset( &fc_limits, 0, sizeof( fc_limits )); + fc_limits.lms_s_unchecked = 1; + fop.ors_filterstr.bv_len = snprintf( buf, sizeof( buf ), + "(entryCSN<=%s)", cf.f_av_value.bv_val ); + } + if ( fop.ors_filterstr.bv_len >= sizeof( buf ) ) { + return LDAP_OTHER; + } + fop.ors_attrsonly = 1; + fop.ors_attrs = slap_anlist_no_attrs; + fop.ors_slimit = 1; + cb.sc_private = NULL; + cb.sc_response = findcsn_cb; + break; + case FIND_PRESENT: + fop.ors_filter = op->ors_filter; + fop.ors_filterstr = op->ors_filterstr; + fop.ors_attrsonly = 0; + fop.ors_attrs = uuid_anlist; + fop.ors_slimit = SLAP_NO_LIMIT; + cb.sc_private = &pcookie; + cb.sc_response = findpres_cb; + pcookie.num = 0; + + /* preallocate storage for a full set */ + pcookie.uuids = op->o_tmpalloc( (SLAP_SYNCUUID_SET_SIZE+1) * + sizeof(struct berval) + SLAP_SYNCUUID_SET_SIZE * UUID_LEN, + op->o_tmpmemctx ); + pcookie.last = (char *)(pcookie.uuids + SLAP_SYNCUUID_SET_SIZE+1); + pcookie.uuids[0].bv_val = pcookie.last; + pcookie.uuids[0].bv_len = UUID_LEN; + for (i=1; i<SLAP_SYNCUUID_SET_SIZE; i++) { + pcookie.uuids[i].bv_val = pcookie.uuids[i-1].bv_val + UUID_LEN; + pcookie.uuids[i].bv_len = UUID_LEN; + } + break; + } + + fop.o_bd->bd_info = (BackendInfo *)on->on_info; + fop.o_bd->be_search( &fop, &frs ); + fop.o_bd->bd_info = (BackendInfo *)on; + + switch( mode ) { + case FIND_MAXCSN: + if ( ber_bvcmp( &si->si_ctxcsn[maxid], &maxcsn )) { +#ifdef CHECK_CSN + Syntax *syn = slap_schema.si_ad_contextCSN->ad_type->sat_syntax; + assert( !syn->ssyn_validate( syn, &maxcsn )); +#endif + ber_bvreplace( &si->si_ctxcsn[maxid], &maxcsn ); + si->si_numops++; /* ensure a checkpoint */ + } + break; + case FIND_CSN: + /* If matching CSN was not found, invalidate the context. */ + Log4( LDAP_DEBUG_SYNC, ldap_syslog_level, "%s syncprov_findcsn: csn%s=%s %sfound\n", + op->o_log_prefix, + cf.f_choice == LDAP_FILTER_EQUALITY ? "=" : "<", + cf.f_av_value.bv_val, cb.sc_private ? "" : "not " ); + if ( !cb.sc_private ) { + /* If we didn't find an exact match, then try for <= */ + if ( findcsn_retry ) { + findcsn_retry = 0; + rs_reinit( &frs, REP_RESULT ); + goto again; + } + rc = LDAP_NO_SUCH_OBJECT; + } + break; + case FIND_PRESENT: + op->o_tmpfree( pcookie.uuids, op->o_tmpmemctx ); + break; + } + + return rc; +} + +static void free_resinfo( syncres *sr ) +{ + syncres **st; + int freeit = 0; + ldap_pvt_thread_mutex_lock( &sr->s_info->ri_mutex ); + for (st = &sr->s_info->ri_list; *st; st = &(*st)->s_rilist) { + if (*st == sr) { + *st = sr->s_rilist; + break; + } + } + if ( !sr->s_info->ri_list ) + freeit = 1; + ldap_pvt_thread_mutex_unlock( &sr->s_info->ri_mutex ); + if ( freeit ) { + ldap_pvt_thread_mutex_destroy( &sr->s_info->ri_mutex ); + if ( sr->s_info->ri_e ) + entry_free( sr->s_info->ri_e ); + if ( !BER_BVISNULL( &sr->s_info->ri_cookie )) + ch_free( sr->s_info->ri_cookie.bv_val ); + ch_free( sr->s_info ); + } +} + +static int +syncprov_free_syncop( syncops *so, int unlink ) +{ + syncres *sr, *srnext; + GroupAssertion *ga, *gnext; + + 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 ); + return 0; + } + ldap_pvt_thread_mutex_unlock( &so->s_mutex ); + if ( unlink ) { + 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 ) { + if ( *sop == so ) { + *sop = so->s_next; + break; + } + } + ldap_pvt_thread_mutex_unlock( &so->s_si->si_ops_mutex ); + } + if ( so->s_flags & PS_IS_DETACHED ) { + filter_free( so->s_op->ors_filter ); + for ( ga = so->s_op->o_groups; ga; ga=gnext ) { + gnext = ga->ga_next; + ch_free( ga ); + } + ch_free( so->s_op ); + } + ch_free( so->s_base.bv_val ); + for ( sr=so->s_res; sr; sr=srnext ) { + srnext = sr->s_next; + free_resinfo( sr ); + ch_free( sr ); + } + ldap_pvt_thread_mutex_destroy( &so->s_mutex ); + ch_free( so ); + return 1; +} + +/* Send a persistent search response */ +static int +syncprov_sendresp( Operation *op, resinfo *ri, syncops *so, int mode ) +{ + SlapReply rs = { REP_SEARCH }; + struct berval cookie, csns[2]; + Entry e_uuid = {0}; + Attribute a_uuid = {0}; + + if ( so->s_op->o_abandon ) + return SLAPD_ABANDON; + + rs.sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2, op->o_tmpmemctx ); + rs.sr_ctrls[1] = NULL; + rs.sr_flags = REP_CTRLS_MUSTBEFREED; + csns[0] = ri->ri_csn; + BER_BVZERO( &csns[1] ); + slap_compose_sync_cookie( op, &cookie, csns, so->s_rid, slap_serverID ? slap_serverID : -1 ); + +#ifdef LDAP_DEBUG + if ( so->s_sid > 0 ) { + Debug( LDAP_DEBUG_SYNC, "%s syncprov_sendresp: to=%03x, cookie=%s\n", + op->o_log_prefix, so->s_sid, cookie.bv_val ); + } else { + Debug( LDAP_DEBUG_SYNC, "%s syncprov_sendresp: cookie=%s\n", + op->o_log_prefix, cookie.bv_val, 0 ); + } +#endif + + e_uuid.e_attrs = &a_uuid; + a_uuid.a_desc = slap_schema.si_ad_entryUUID; + a_uuid.a_nvals = &ri->ri_uuid; + rs.sr_err = syncprov_state_ctrl( op, &rs, &e_uuid, + mode, rs.sr_ctrls, 0, 1, &cookie ); + op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx ); + + rs.sr_entry = &e_uuid; + if ( mode == LDAP_SYNC_ADD || mode == LDAP_SYNC_MODIFY ) { + e_uuid = *ri->ri_e; + e_uuid.e_private = NULL; + } + + switch( mode ) { + case LDAP_SYNC_ADD: + if ( ri->ri_isref && so->s_op->o_managedsait <= SLAP_CONTROL_IGNORED ) { + rs.sr_ref = get_entry_referrals( op, rs.sr_entry ); + rs.sr_err = send_search_reference( op, &rs ); + ber_bvarray_free( rs.sr_ref ); + break; + } + /* fallthru */ + case LDAP_SYNC_MODIFY: + Debug( LDAP_DEBUG_SYNC, "%s syncprov_sendresp: sending %s, dn=%s\n", + op->o_log_prefix, + mode == LDAP_SYNC_ADD ? "LDAP_SYNC_ADD" : "LDAP_SYNC_MODIFY", + e_uuid.e_nname.bv_val ); + rs.sr_attrs = op->ors_attrs; + rs.sr_err = send_search_entry( op, &rs ); + break; + case LDAP_SYNC_DELETE: + Debug( LDAP_DEBUG_SYNC, "%s syncprov_sendresp: " + "sending LDAP_SYNC_DELETE, dn=%s\n", + op->o_log_prefix, ri->ri_dn.bv_val, 0 ); + e_uuid.e_attrs = NULL; + e_uuid.e_name = ri->ri_dn; + e_uuid.e_nname = ri->ri_ndn; + if ( ri->ri_isref && so->s_op->o_managedsait <= SLAP_CONTROL_IGNORED ) { + struct berval bv = BER_BVNULL; + rs.sr_ref = &bv; + rs.sr_err = send_search_reference( op, &rs ); + } else { + rs.sr_err = send_search_entry( op, &rs ); + } + break; + default: + assert(0); + } + return rs.sr_err; +} + +static void +syncprov_qstart( syncops *so ); + +/* Play back queued responses */ +static int +syncprov_qplay( Operation *op, syncops *so ) +{ + syncres *sr; + int rc = 0; + + do { + ldap_pvt_thread_mutex_lock( &so->s_mutex ); + sr = so->s_res; + /* Exit loop with mutex held */ + if ( !sr ) + break; + so->s_res = sr->s_next; + if ( !so->s_res ) + so->s_restail = NULL; + ldap_pvt_thread_mutex_unlock( &so->s_mutex ); + + if ( !so->s_op->o_abandon ) { + + if ( sr->s_mode == LDAP_SYNC_NEW_COOKIE ) { + SlapReply rs = { REP_INTERMEDIATE }; + + rc = syncprov_sendinfo( op, &rs, LDAP_TAG_SYNC_NEW_COOKIE, + &sr->s_info->ri_cookie, 0, NULL, 0 ); + } else { + rc = syncprov_sendresp( op, sr->s_info, so, sr->s_mode ); + } + } + + free_resinfo( sr ); + ch_free( sr ); + + if ( so->s_op->o_abandon ) + continue; + + /* Exit loop with mutex held */ + ldap_pvt_thread_mutex_lock( &so->s_mutex ); + break; + + } while (1); + + /* We now only send one change at a time, to prevent one + * psearch from hogging all the CPU. Resubmit this task if + * there are more responses queued and no errors occurred. + */ + + 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; +} + +/* task for playing back queued responses */ +static void * +syncprov_qtask( void *ctx, void *arg ) +{ + syncops *so = arg; + OperationBuffer opbuf; + Operation *op; + BackendDB be; + int rc; + + op = &opbuf.ob_op; + *op = *so->s_op; + op->o_hdr = &opbuf.ob_hdr; + op->o_controls = opbuf.ob_controls; + memset( op->o_controls, 0, sizeof(opbuf.ob_controls) ); + op->o_sync = SLAP_CONTROL_IGNORED; + + *op->o_hdr = *so->s_op->o_hdr; + + op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx, 1); + op->o_tmpmfuncs = &slap_sl_mfuncs; + op->o_threadctx = ctx; + + /* syncprov_qplay expects a fake db */ + be = *so->s_op->o_bd; + be.be_flags |= SLAP_DBFLAG_OVERLAY; + op->o_bd = &be; + LDAP_SLIST_FIRST(&op->o_extra) = NULL; + op->o_callback = NULL; + + rc = syncprov_qplay( op, so ); + + /* decrement use count... */ + syncprov_free_syncop( so, 1 ); + + return NULL; +} + +/* Start the task to play back queued psearch responses */ +static void +syncprov_qstart( syncops *so ) +{ + so->s_flags |= PS_TASK_QUEUED; + so->s_inuse++; + ldap_pvt_thread_pool_submit( &connection_pool, + syncprov_qtask, so ); +} + +/* Queue a persistent search response */ +static int +syncprov_qresp( opcookie *opc, syncops *so, int mode ) +{ + syncres *sr; + resinfo *ri; + int srsize; + struct berval csn = opc->sctxcsn; + + sr = ch_malloc( sizeof( syncres )); + sr->s_next = NULL; + sr->s_mode = mode; + if ( !opc->ssres.s_info ) { + + srsize = sizeof( resinfo ); + if ( csn.bv_len ) + srsize += csn.bv_len + 1; + + if ( opc->se ) { + Attribute *a; + ri = ch_malloc( srsize ); + ri->ri_dn = opc->se->e_name; + ri->ri_ndn = opc->se->e_nname; + a = attr_find( opc->se->e_attrs, slap_schema.si_ad_entryUUID ); + if ( a ) + ri->ri_uuid = a->a_nvals[0]; + else + ri->ri_uuid.bv_len = 0; + if ( csn.bv_len ) { + ri->ri_csn.bv_val = (char *)(ri + 1); + ri->ri_csn.bv_len = csn.bv_len; + memcpy( ri->ri_csn.bv_val, csn.bv_val, csn.bv_len ); + ri->ri_csn.bv_val[csn.bv_len] = '\0'; + } else { + ri->ri_csn.bv_val = NULL; + } + } else { + srsize += opc->suuid.bv_len + + opc->sdn.bv_len + 1 + opc->sndn.bv_len + 1; + ri = ch_malloc( srsize ); + ri->ri_dn.bv_val = (char *)(ri + 1); + ri->ri_dn.bv_len = opc->sdn.bv_len; + ri->ri_ndn.bv_val = lutil_strcopy( ri->ri_dn.bv_val, + opc->sdn.bv_val ) + 1; + ri->ri_ndn.bv_len = opc->sndn.bv_len; + ri->ri_uuid.bv_val = lutil_strcopy( ri->ri_ndn.bv_val, + opc->sndn.bv_val ) + 1; + ri->ri_uuid.bv_len = opc->suuid.bv_len; + AC_MEMCPY( ri->ri_uuid.bv_val, opc->suuid.bv_val, opc->suuid.bv_len ); + if ( csn.bv_len ) { + ri->ri_csn.bv_val = ri->ri_uuid.bv_val + ri->ri_uuid.bv_len; + memcpy( ri->ri_csn.bv_val, csn.bv_val, csn.bv_len ); + ri->ri_csn.bv_val[csn.bv_len] = '\0'; + } else { + ri->ri_csn.bv_val = NULL; + } + } + ri->ri_list = &opc->ssres; + ri->ri_e = opc->se; + ri->ri_csn.bv_len = csn.bv_len; + ri->ri_isref = opc->sreference; + BER_BVZERO( &ri->ri_cookie ); + ldap_pvt_thread_mutex_init( &ri->ri_mutex ); + opc->se = NULL; + opc->ssres.s_info = ri; + } + ri = opc->ssres.s_info; + sr->s_info = ri; + ldap_pvt_thread_mutex_lock( &ri->ri_mutex ); + sr->s_rilist = ri->ri_list; + ri->ri_list = sr; + if ( mode == LDAP_SYNC_NEW_COOKIE && BER_BVISNULL( &ri->ri_cookie )) { + syncprov_info_t *si = opc->son->on_bi.bi_private; + + slap_compose_sync_cookie( NULL, &ri->ri_cookie, si->si_ctxcsn, + so->s_rid, slap_serverID ? slap_serverID : -1); + } + Debug( LDAP_DEBUG_SYNC, "%s syncprov_qresp: " + "set up a new syncres mode=%d csn=%s\n", + so->s_op->o_log_prefix, mode, csn.bv_val ); + ldap_pvt_thread_mutex_unlock( &ri->ri_mutex ); + + ldap_pvt_thread_mutex_lock( &so->s_mutex ); + if ( !so->s_res ) { + so->s_res = sr; + } else { + so->s_restail->s_next = sr; + } + so->s_restail = sr; + + /* If the base of the psearch was modified, check it next time round */ + if ( so->s_flags & PS_WROTE_BASE ) { + so->s_flags ^= PS_WROTE_BASE; + so->s_flags |= PS_FIND_BASE; + } + if (( so->s_flags & (PS_IS_DETACHED|PS_TASK_QUEUED)) == PS_IS_DETACHED ) { + syncprov_qstart( so ); + } + ldap_pvt_thread_mutex_unlock( &so->s_mutex ); + return LDAP_SUCCESS; +} + +static int +syncprov_drop_psearch( syncops *so, int lock ) +{ + if ( so->s_flags & PS_IS_DETACHED ) { + if ( lock ) + ldap_pvt_thread_mutex_lock( &so->s_op->o_conn->c_mutex ); + so->s_op->o_conn->c_n_ops_executing--; + so->s_op->o_conn->c_n_ops_completed++; + LDAP_STAILQ_REMOVE( &so->s_op->o_conn->c_ops, so->s_op, Operation, + o_next ); + if ( lock ) + ldap_pvt_thread_mutex_unlock( &so->s_op->o_conn->c_mutex ); + } + return syncprov_free_syncop( so, 0 ); +} + +static int +syncprov_ab_cleanup( Operation *op, SlapReply *rs ) +{ + slap_callback *sc = op->o_callback; + op->o_callback = sc->sc_next; + syncprov_drop_psearch( sc->sc_private, 0 ); + op->o_tmpfree( sc, op->o_tmpmemctx ); + return 0; +} + +static int +syncprov_op_abandon( Operation *op, SlapReply *rs ) +{ + slap_overinst *on = (slap_overinst *)op->o_bd->bd_info; + syncprov_info_t *si = on->on_bi.bi_private; + syncops *so, **sop; + + ldap_pvt_thread_mutex_lock( &si->si_ops_mutex ); + for ( sop=&si->si_ops; (so = *sop); sop = &(*sop)->s_next ) { + if ( so->s_op->o_connid == op->o_connid && + so->s_op->o_msgid == op->orn_msgid ) { + so->s_op->o_abandon = 1; + *sop = so->s_next; + break; + } + } + ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex ); + if ( so ) { + /* Is this really a Cancel exop? */ + if ( op->o_tag != LDAP_REQ_ABANDON ) { + so->s_op->o_cancel = SLAP_CANCEL_ACK; + rs->sr_err = LDAP_CANCELLED; + send_ldap_result( so->s_op, rs ); + if ( so->s_flags & PS_IS_DETACHED ) { + slap_callback *cb; + cb = op->o_tmpcalloc( 1, sizeof(slap_callback), op->o_tmpmemctx ); + cb->sc_cleanup = syncprov_ab_cleanup; + cb->sc_next = op->o_callback; + cb->sc_private = so; + op->o_callback = cb; + return SLAP_CB_CONTINUE; + } + } + syncprov_drop_psearch( so, 0 ); + } + return SLAP_CB_CONTINUE; +} + +/* Find which persistent searches are affected by this operation */ +static void +syncprov_matchops( Operation *op, opcookie *opc, int saveit ) +{ + slap_overinst *on = opc->son; + syncprov_info_t *si = on->on_bi.bi_private; + + fbase_cookie fc; + syncops **pss; + Entry *e = NULL; + Attribute *a; + int rc, gonext; + struct berval newdn; + int freefdn = 0; + BackendDB *b0 = op->o_bd, db; + + fc.fdn = &op->o_req_ndn; + /* compute new DN */ + if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) { + struct berval pdn; + if ( op->orr_nnewSup ) pdn = *op->orr_nnewSup; + else dnParent( fc.fdn, &pdn ); + build_new_dn( &newdn, &pdn, &op->orr_nnewrdn, op->o_tmpmemctx ); + fc.fdn = &newdn; + freefdn = 1; + } + if ( op->o_tag != LDAP_REQ_ADD ) { + if ( !SLAP_ISOVERLAY( op->o_bd )) { + db = *op->o_bd; + op->o_bd = &db; + } + rc = overlay_entry_get_ov( op, fc.fdn, NULL, NULL, 0, &e, on ); + /* If we're sending responses now, make a copy and unlock the DB */ + if ( e && !saveit ) { + if ( !opc->se ) + opc->se = entry_dup( e ); + overlay_entry_release_ov( op, e, 0, on ); + e = opc->se; + } + if ( rc ) { + Debug( LDAP_DEBUG_SYNC, "%s syncprov_matchops: " + "%s check, error finding entry dn=%s in database\n", + op->o_log_prefix, saveit ? "initial" : "final", fc.fdn->bv_val ); + op->o_bd = b0; + return; + } + } else { + e = op->ora_e; + if ( !saveit ) { + if ( !opc->se ) + opc->se = entry_dup( e ); + e = opc->se; + } + } + + if ( saveit || op->o_tag == LDAP_REQ_ADD ) { + ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx ); + ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx ); + opc->sreference = is_entry_referral( e ); + a = attr_find( e->e_attrs, slap_schema.si_ad_entryUUID ); + if ( a ) + ber_dupbv_x( &opc->suuid, &a->a_nvals[0], op->o_tmpmemctx ); + Log4( LDAP_DEBUG_SYNC, ldap_syslog_level, "%s syncprov_matchops: " + "%srecording uuid for dn=%s on opc=%p\n", + op->o_log_prefix, a ? "" : "not ", opc->sdn.bv_val, opc ); + } else if ( op->o_tag == LDAP_REQ_MODRDN && !saveit ) { + op->o_tmpfree( opc->sndn.bv_val, op->o_tmpmemctx ); + op->o_tmpfree( opc->sdn.bv_val, op->o_tmpmemctx ); + ber_dupbv_x( &opc->sdn, &e->e_name, op->o_tmpmemctx ); + ber_dupbv_x( &opc->sndn, &e->e_nname, op->o_tmpmemctx ); + } + + ldap_pvt_thread_mutex_lock( &si->si_ops_mutex ); + for (pss = &si->si_ops; *pss; pss = gonext ? &(*pss)->s_next : pss) + { + Operation op2; + Opheader oh; + syncmatches *sm; + int found = 0; + syncops *snext, *ss = *pss; + + gonext = 1; + if ( ss->s_op->o_abandon ) + continue; + + /* Don't send ops back to the originator */ + if ( opc->osid > 0 && opc->osid == ss->s_sid ) { + Debug( LDAP_DEBUG_SYNC, "syncprov_matchops: skipping original sid %03x\n", + opc->osid, 0, 0 ); + continue; + } + + /* Don't send ops back to the messenger */ + if ( opc->rsid > 0 && opc->rsid == ss->s_sid ) { + Debug( LDAP_DEBUG_SYNC, "syncprov_matchops: skipping relayed sid %03x\n", + opc->rsid, 0, 0 ); + continue; + } + + /* validate base */ + fc.fss = ss; + fc.fbase = 0; + fc.fscope = 0; + + /* If the base of the search is missing, signal a refresh */ + rc = syncprov_findbase( op, &fc ); + if ( rc != LDAP_SUCCESS ) { + SlapReply rs = {REP_RESULT}; + send_ldap_error( ss->s_op, &rs, LDAP_SYNC_REFRESH_REQUIRED, + "search base has changed" ); + snext = ss->s_next; + if ( syncprov_drop_psearch( ss, 1 ) ) + *pss = snext; + gonext = 0; + continue; + } + + /* If we're sending results now, look for this op in old matches */ + if ( !saveit ) { + syncmatches *old; + + /* Did we modify the search base? */ + if ( dn_match( &op->o_req_ndn, &ss->s_base )) { + ldap_pvt_thread_mutex_lock( &ss->s_mutex ); + ss->s_flags |= PS_WROTE_BASE; + ldap_pvt_thread_mutex_unlock( &ss->s_mutex ); + } + + for ( sm=opc->smatches, old=(syncmatches *)&opc->smatches; sm; + old=sm, sm=sm->sm_next ) { + if ( sm->sm_op == ss ) { + found = 1; + old->sm_next = sm->sm_next; + op->o_tmpfree( sm, op->o_tmpmemctx ); + break; + } + } + } + + if ( fc.fscope ) { + ldap_pvt_thread_mutex_lock( &ss->s_mutex ); + op2 = *ss->s_op; + oh = *op->o_hdr; + oh.oh_conn = ss->s_op->o_conn; + oh.oh_connid = ss->s_op->o_connid; + op2.o_bd = op->o_bd->bd_self; + op2.o_hdr = &oh; + op2.o_extra = op->o_extra; + op2.o_callback = NULL; + if (ss->s_flags & PS_FIX_FILTER) { + /* Skip the AND/GE clause that we stuck on in front. We + would lose deletes/mods that happen during the refresh + phase otherwise (ITS#6555) */ + op2.ors_filter = ss->s_op->ors_filter->f_and->f_next; + } + rc = test_filter( &op2, e, op2.ors_filter ); + ldap_pvt_thread_mutex_unlock( &ss->s_mutex ); + } + + Debug( LDAP_DEBUG_TRACE, "syncprov_matchops: sid %03x fscope %d rc %d\n", + ss->s_sid, fc.fscope, rc ); + + /* check if current o_req_dn is in scope and matches filter */ + if ( fc.fscope && rc == LDAP_COMPARE_TRUE ) { + if ( saveit ) { + sm = op->o_tmpalloc( sizeof(syncmatches), op->o_tmpmemctx ); + sm->sm_next = opc->smatches; + sm->sm_op = ss; + ldap_pvt_thread_mutex_lock( &ss->s_mutex ); + ++ss->s_inuse; + ldap_pvt_thread_mutex_unlock( &ss->s_mutex ); + opc->smatches = sm; + } else { + /* if found send UPDATE else send ADD */ + syncprov_qresp( opc, ss, + found ? LDAP_SYNC_MODIFY : LDAP_SYNC_ADD ); + } + } else if ( !saveit && found ) { + /* send DELETE */ + syncprov_qresp( opc, ss, LDAP_SYNC_DELETE ); + } else if ( !saveit ) { + syncprov_qresp( opc, ss, LDAP_SYNC_NEW_COOKIE ); + } + if ( !saveit && found ) { + /* Decrement s_inuse, was incremented when called + * with saveit == TRUE + */ + snext = ss->s_next; + if ( syncprov_free_syncop( ss, 0 ) ) { + *pss = snext; + gonext = 0; + } + } + } + ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex ); + + if ( op->o_tag != LDAP_REQ_ADD && e ) { + if ( !SLAP_ISOVERLAY( op->o_bd )) { + op->o_bd = &db; + } + if ( saveit ) + overlay_entry_release_ov( op, e, 0, on ); + op->o_bd = b0; + } + if ( !saveit ) { + if ( opc->ssres.s_info ) + free_resinfo( &opc->ssres ); + else if ( opc->se ) + entry_free( opc->se ); + } + if ( freefdn ) { + op->o_tmpfree( fc.fdn->bv_val, op->o_tmpmemctx ); + } + op->o_bd = b0; +} + +static int +syncprov_op_cleanup( Operation *op, SlapReply *rs ) +{ + slap_callback *cb = op->o_callback; + opcookie *opc = cb->sc_private; + slap_overinst *on = opc->son; + syncprov_info_t *si = on->on_bi.bi_private; + syncmatches *sm, *snext; + modtarget *mt; + + ldap_pvt_thread_mutex_lock( &si->si_ops_mutex ); + if ( si->si_active ) + si->si_active--; + ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex ); + + for (sm = opc->smatches; sm; sm=snext) { + snext = sm->sm_next; + syncprov_free_syncop( sm->sm_op, 1 ); + op->o_tmpfree( sm, op->o_tmpmemctx ); + } + + /* Remove op from lock table */ + mt = opc->smt; + if ( mt ) { + modinst *mi = (modinst *)(opc+1), **m2; + ldap_pvt_thread_mutex_lock( &mt->mt_mutex ); + for (m2 = &mt->mt_mods; ; m2 = &(*m2)->mi_next) { + if ( *m2 == mi ) { + *m2 = mi->mi_next; + if ( mt->mt_tail == mi ) + mt->mt_tail = ( m2 == &mt->mt_mods ) ? NULL : (modinst *)m2; + break; + } + } + /* If there are more, promote the next one */ + if ( mt->mt_mods ) { + ldap_pvt_thread_mutex_unlock( &mt->mt_mutex ); + } else { + ldap_pvt_thread_mutex_unlock( &mt->mt_mutex ); + ldap_pvt_thread_mutex_lock( &si->si_mods_mutex ); + avl_delete( &si->si_mods, mt, sp_avl_cmp ); + ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex ); + ldap_pvt_thread_mutex_destroy( &mt->mt_mutex ); + ch_free( mt->mt_dn.bv_val ); + ch_free( mt ); + } + } + if ( !BER_BVISNULL( &opc->suuid )) + op->o_tmpfree( opc->suuid.bv_val, op->o_tmpmemctx ); + if ( !BER_BVISNULL( &opc->sndn )) + op->o_tmpfree( opc->sndn.bv_val, op->o_tmpmemctx ); + if ( !BER_BVISNULL( &opc->sdn )) + op->o_tmpfree( opc->sdn.bv_val, op->o_tmpmemctx ); + op->o_callback = cb->sc_next; + op->o_tmpfree(cb, op->o_tmpmemctx); + + return 0; +} + +static void +syncprov_checkpoint( Operation *op, slap_overinst *on ) +{ + syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private; + Modifications mod; + Operation opm; + SlapReply rsm = {REP_RESULT}; + slap_callback cb = {0}; + BackendDB be; + BackendInfo *bi; + +#ifdef CHECK_CSN + Syntax *syn = slap_schema.si_ad_contextCSN->ad_type->sat_syntax; + + int i; + for ( i=0; i<si->si_numcsns; i++ ) { + assert( !syn->ssyn_validate( syn, si->si_ctxcsn+i )); + } +#endif + + Debug( LDAP_DEBUG_SYNC, "%s syncprov_checkpoint: running checkpoint\n", + op->o_log_prefix, 0, 0 ); + + mod.sml_numvals = si->si_numcsns; + mod.sml_values = si->si_ctxcsn; + mod.sml_nvalues = NULL; + mod.sml_desc = slap_schema.si_ad_contextCSN; + mod.sml_op = LDAP_MOD_REPLACE; + mod.sml_flags = SLAP_MOD_INTERNAL; + mod.sml_next = NULL; + + cb.sc_response = slap_null_cb; + opm = *op; + opm.o_tag = LDAP_REQ_MODIFY; + opm.o_callback = &cb; + opm.orm_modlist = &mod; + opm.orm_no_opattrs = 1; + if ( SLAP_GLUE_SUBORDINATE( op->o_bd )) { + be = *on->on_info->oi_origdb; + opm.o_bd = &be; + } + opm.o_req_dn = si->si_contextdn; + opm.o_req_ndn = si->si_contextdn; + bi = opm.o_bd->bd_info; + 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 && + SLAP_SYNC_SUBENTRY( opm.o_bd )) { + const char *text; + char txtbuf[SLAP_TEXT_BUFLEN]; + size_t textlen = sizeof txtbuf; + Entry *e = slap_create_context_csn_entry( opm.o_bd, NULL ); + rs_reinit( &rsm, REP_RESULT ); + slap_mods2entry( &mod, &e, 0, 1, &text, txtbuf, textlen); + opm.ora_e = e; + opm.o_bd->be_add( &opm, &rsm ); + if ( e == opm.ora_e ) + be_entry_release_w( &opm, opm.ora_e ); + } + opm.o_bd->bd_info = bi; + + if ( mod.sml_next != NULL ) { + slap_mods_free( mod.sml_next, 1 ); + } +#ifdef CHECK_CSN + for ( i=0; i<si->si_numcsns; i++ ) { + assert( !syn->ssyn_validate( syn, si->si_ctxcsn+i )); + } +#endif +} + +static void +syncprov_add_slog( Operation *op ) +{ + opcookie *opc = op->o_callback->sc_private; + slap_overinst *on = opc->son; + syncprov_info_t *si = on->on_bi.bi_private; + sessionlog *sl; + slog_entry *se; + char uuidstr[40]; + int rc; + + sl = si->si_logs; + { + if ( BER_BVISEMPTY( &op->o_csn ) ) { + /* During the syncrepl refresh phase we can receive operations + * without a csn. We cannot reliably determine the consumers + * state with respect to such operations, so we ignore them and + * wipe out anything in the log if we see them. + */ + ldap_pvt_thread_rdwr_wlock( &sl->sl_mutex ); + /* can only do this if no one else is reading the log at the moment */ + if ( !sl->sl_playing ) { + tavl_free( sl->sl_entries, (AVL_FREE)ch_free ); + sl->sl_num = 0; + sl->sl_entries = NULL; + } + ldap_pvt_thread_rdwr_wunlock( &sl->sl_mutex ); + return; + } + + /* Allocate a record. UUIDs are not NUL-terminated. */ + se = ch_malloc( sizeof( slog_entry ) + opc->suuid.bv_len + + op->o_csn.bv_len + 1 ); + se->se_tag = op->o_tag; + + se->se_uuid.bv_val = (char *)(&se[1]); + AC_MEMCPY( se->se_uuid.bv_val, opc->suuid.bv_val, opc->suuid.bv_len ); + se->se_uuid.bv_len = opc->suuid.bv_len; + + se->se_csn.bv_val = se->se_uuid.bv_val + opc->suuid.bv_len; + AC_MEMCPY( se->se_csn.bv_val, op->o_csn.bv_val, op->o_csn.bv_len ); + se->se_csn.bv_val[op->o_csn.bv_len] = '\0'; + se->se_csn.bv_len = op->o_csn.bv_len; + se->se_sid = slap_parse_csn_sid( &se->se_csn ); + + ldap_pvt_thread_rdwr_wlock( &sl->sl_mutex ); + if ( LogTest( LDAP_DEBUG_SYNC ) ) { + uuidstr[0] = 0; + if ( !BER_BVISEMPTY( &opc->suuid ) ) { + lutil_uuidstr_from_normalized( opc->suuid.bv_val, opc->suuid.bv_len, + uuidstr, 40 ); + } + Debug( LDAP_DEBUG_SYNC, "%s syncprov_add_slog: " + "adding csn=%s to sessionlog, uuid=%s\n", + op->o_log_prefix, se->se_csn.bv_val, uuidstr ); + } + if ( !sl->sl_entries ) { + if ( !sl->sl_mincsn ) { + sl->sl_numcsns = 1; + sl->sl_mincsn = ch_malloc( 2*sizeof( struct berval )); + sl->sl_sids = ch_malloc( sizeof( int )); + sl->sl_sids[0] = se->se_sid; + ber_dupbv( sl->sl_mincsn, &se->se_csn ); + BER_BVZERO( &sl->sl_mincsn[1] ); + } + } + rc = tavl_insert( &sl->sl_entries, se, syncprov_sessionlog_cmp, avl_dup_error ); + if ( rc ) { + Debug( LDAP_DEBUG_SYNC, "%s syncprov_add_slog: " + "duplicate sessionlog entry ignored: csn=%s, uuid=%s\n", + op->o_log_prefix, se->se_csn.bv_val, uuidstr ); + ch_free( se ); + goto leave; + } + sl->sl_num++; + if ( !sl->sl_playing && sl->sl_num > sl->sl_size ) { + Avlnode *edge = tavl_end( sl->sl_entries, TAVL_DIR_LEFT ); + while ( sl->sl_num > sl->sl_size ) { + int i; + Avlnode *next = tavl_next( edge, TAVL_DIR_RIGHT ); + se = edge->avl_data; + Debug( LDAP_DEBUG_SYNC, "%s syncprov_add_slog: " + "expiring csn=%s from sessionlog (sessionlog size=%d)\n", + op->o_log_prefix, se->se_csn.bv_val, sl->sl_num ); + for ( i=0; i<sl->sl_numcsns; i++ ) + if ( sl->sl_sids[i] >= se->se_sid ) + break; + if ( i == sl->sl_numcsns || sl->sl_sids[i] != se->se_sid ) { + Debug( LDAP_DEBUG_SYNC, "%s syncprov_add_slog: " + "adding csn=%s to mincsn\n", + op->o_log_prefix, se->se_csn.bv_val, 0 ); + slap_insert_csn_sids( (struct sync_cookie *)sl, + i, se->se_sid, &se->se_csn ); + } else { + Log4( LDAP_DEBUG_SYNC, ldap_syslog_level, "%s syncprov_add_slog: " + "updating mincsn for sid=%d csn=%s to %s\n", + op->o_log_prefix, se->se_sid, sl->sl_mincsn[i].bv_val, se->se_csn.bv_val ); + ber_bvreplace( &sl->sl_mincsn[i], &se->se_csn ); + } + tavl_delete( &sl->sl_entries, se, syncprov_sessionlog_cmp ); + ch_free( se ); + edge = next; + sl->sl_num--; + } + } +leave: + ldap_pvt_thread_rdwr_wunlock( &sl->sl_mutex ); + } +} + +/* Just set a flag if we found the matching entry */ +static int +playlog_cb( Operation *op, SlapReply *rs ) +{ + if ( rs->sr_type == REP_SEARCH ) { + op->o_callback->sc_private = (void *)1; + } + return rs->sr_err; +} + +/* enter with sl->sl_mutex locked, release before returning */ +static void +syncprov_playlog( Operation *op, SlapReply *rs, sessionlog *sl, + sync_control *srs, BerVarray ctxcsn, int numcsns, int *sids, + struct berval *mincsn ) +{ + slap_overinst *on = (slap_overinst *)op->o_bd->bd_info; + int i, j, ndel, num, nmods, mmods; + Avlnode *entry; + char cbuf[LDAP_PVT_CSNSTR_BUFSIZE]; + BerVarray uuids; + struct berval delcsn[2]; + + if ( !sl->sl_num ) { + ldap_pvt_thread_rdwr_wunlock( &sl->sl_mutex ); + return; + } + + num = sl->sl_num; + i = 0; + nmods = 0; + sl->sl_playing++; + ldap_pvt_thread_rdwr_wunlock( &sl->sl_mutex ); + + uuids = op->o_tmpalloc( (num+1) * sizeof( struct berval ) + + num * UUID_LEN, op->o_tmpmemctx ); + uuids[0].bv_val = (char *)(uuids + num + 1); + + delcsn[0].bv_len = 0; + delcsn[0].bv_val = cbuf; + BER_BVZERO(&delcsn[1]); + + ldap_pvt_thread_rdwr_rlock( &sl->sl_mutex ); + /* Make a copy of the relevant UUIDs. Put the Deletes up front + * and everything else at the end. Do this first so we can + * let the write side manage the sessionlog again. + */ + assert( sl->sl_entries ); + + /* Find first relevant log entry. If greater than mincsn, backtrack one entry */ + { + slog_entry te = {0}; + te.se_csn = *mincsn; + entry = tavl_find3( sl->sl_entries, &te, syncprov_sessionlog_cmp, &ndel ); + } + if ( ndel > 0 && entry ) + entry = tavl_next( entry, TAVL_DIR_LEFT ); + /* if none, just start at beginning */ + if ( !entry ) + entry = tavl_end( sl->sl_entries, TAVL_DIR_LEFT ); + + do { + slog_entry *se = entry->avl_data; + int k; + + /* Make sure writes can still make progress */ + ldap_pvt_thread_rdwr_runlock( &sl->sl_mutex ); + ndel = 1; + for ( k=0; k<srs->sr_state.numcsns; k++ ) { + if ( se->se_sid == srs->sr_state.sids[k] ) { + ndel = ber_bvcmp( &se->se_csn, &srs->sr_state.ctxcsn[k] ); + break; + } + } + if ( ndel <= 0 ) { + ldap_pvt_thread_rdwr_rlock( &sl->sl_mutex ); + continue; + } + ndel = 0; + for ( k=0; k<numcsns; k++ ) { + if ( se->se_sid == sids[k] ) { + ndel = ber_bvcmp( &se->se_csn, &ctxcsn[k] ); + break; + } + } + if ( ndel > 0 ) { + Debug( LDAP_DEBUG_SYNC, "%s syncprov_playlog: " + "cmp %d, too new\n", op->o_log_prefix, ndel, 0 ); + ldap_pvt_thread_rdwr_rlock( &sl->sl_mutex ); + break; + } + if ( se->se_tag == LDAP_REQ_DELETE ) { + j = i; + i++; + AC_MEMCPY( cbuf, se->se_csn.bv_val, se->se_csn.bv_len ); + delcsn[0].bv_len = se->se_csn.bv_len; + delcsn[0].bv_val[delcsn[0].bv_len] = '\0'; + } else { + if ( se->se_tag == LDAP_REQ_ADD ) { + ldap_pvt_thread_rdwr_rlock( &sl->sl_mutex ); + continue; + } + nmods++; + j = num - nmods; + } + uuids[j].bv_val = uuids[0].bv_val + (j * UUID_LEN); + AC_MEMCPY(uuids[j].bv_val, se->se_uuid.bv_val, UUID_LEN); + uuids[j].bv_len = UUID_LEN; + + if ( LogTest( LDAP_DEBUG_SYNC ) ) { + char uuidstr[40] = {}; + lutil_uuidstr_from_normalized( uuids[j].bv_val, uuids[j].bv_len, + uuidstr, 40 ); + Log4( LDAP_DEBUG_SYNC, ldap_syslog_level, "%s syncprov_playlog: " + "picking a %s entry uuid=%s cookie=%s\n", + op->o_log_prefix, se->se_tag == LDAP_REQ_DELETE ? "deleted" : "modified", + uuidstr, delcsn[0].bv_len ? delcsn[0].bv_val : "(null)" ); + } + ldap_pvt_thread_rdwr_rlock( &sl->sl_mutex ); + } while ( (entry = tavl_next( entry, TAVL_DIR_RIGHT )) != NULL ); + ldap_pvt_thread_rdwr_runlock( &sl->sl_mutex ); + ldap_pvt_thread_rdwr_wlock( &sl->sl_mutex ); + sl->sl_playing--; + ldap_pvt_thread_rdwr_wunlock( &sl->sl_mutex ); + + ndel = i; + + /* Zero out unused slots */ + for ( i=ndel; i < num - nmods; i++ ) + uuids[i].bv_len = 0; + + /* Mods must be validated to see if they belong in this delete set. + */ + + mmods = nmods; + /* Strip any duplicates */ + for ( i=0; i<nmods; i++ ) { + for ( j=0; j<ndel; j++ ) { + if ( bvmatch( &uuids[j], &uuids[num - 1 - i] )) { + uuids[num - 1 - i].bv_len = 0; + mmods --; + break; + } + } + if ( uuids[num - 1 - i].bv_len == 0 ) continue; + for ( j=0; j<i; j++ ) { + if ( bvmatch( &uuids[num - 1 - j], &uuids[num - 1 - i] )) { + uuids[num - 1 - i].bv_len = 0; + mmods --; + break; + } + } + } + + if ( mmods ) { + Operation fop; + int rc; + Filter mf, af; + AttributeAssertion eq = ATTRIBUTEASSERTION_INIT; + slap_callback cb = {0}; + + fop = *op; + + fop.o_sync_mode = 0; + fop.o_callback = &cb; + fop.ors_limit = NULL; + fop.ors_tlimit = SLAP_NO_LIMIT; + fop.ors_attrs = slap_anlist_all_attributes; + fop.ors_attrsonly = 0; + fop.o_managedsait = SLAP_CONTROL_CRITICAL; + + af.f_choice = LDAP_FILTER_AND; + af.f_next = NULL; + af.f_and = &mf; + mf.f_choice = LDAP_FILTER_EQUALITY; + mf.f_ava = &eq; + mf.f_av_desc = slap_schema.si_ad_entryUUID; + mf.f_next = fop.ors_filter; + + fop.ors_filter = ⁡ + + cb.sc_response = playlog_cb; + fop.o_bd->bd_info = (BackendInfo *)on->on_info; + + for ( i=ndel; i<num; i++ ) { + if ( uuids[i].bv_len != 0 ) { + SlapReply frs = { REP_RESULT }; + + mf.f_av_value = uuids[i]; + cb.sc_private = NULL; + fop.ors_slimit = 1; + rc = fop.o_bd->be_search( &fop, &frs ); + + /* If entry was not found, add to delete list */ + if ( !cb.sc_private ) { + uuids[ndel++] = uuids[i]; + } + } + } + fop.o_bd->bd_info = (BackendInfo *)on; + } + if ( ndel ) { + struct berval cookie; + + if ( delcsn[0].bv_len ) { + slap_compose_sync_cookie( op, &cookie, delcsn, srs->sr_state.rid, + slap_serverID ? slap_serverID : -1 ); + + Debug( LDAP_DEBUG_SYNC, "%s syncprov_playlog: cookie=%s\n", + op->o_log_prefix, cookie.bv_val, 0 ); + } + + uuids[ndel].bv_val = NULL; + syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET, + delcsn[0].bv_len ? &cookie : NULL, 0, uuids, 1 ); + if ( delcsn[0].bv_len ) { + op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx ); + } + } + 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; i<numvals; i++ ) { + sid = slap_parse_csn_sid( &vals[i] ); + for ( j=0; j<si->si_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 ) +{ + opcookie *opc = op->o_callback->sc_private; + slap_overinst *on = opc->son; + syncprov_info_t *si = on->on_bi.bi_private; + syncmatches *sm; + + if ( rs->sr_err == LDAP_SUCCESS ) + { + struct berval maxcsn; + char cbuf[LDAP_PVT_CSNSTR_BUFSIZE]; + int do_check = 0, have_psearches, foundit, csn_changed = 0; + + ldap_pvt_thread_mutex_lock( &si->si_resp_mutex ); + + /* Update our context CSN */ + cbuf[0] = '\0'; + maxcsn.bv_val = cbuf; + maxcsn.bv_len = sizeof(cbuf); + ldap_pvt_thread_rdwr_wlock( &si->si_csn_rwlock ); + + slap_get_commit_csn( op, &maxcsn, &foundit ); + if ( BER_BVISEMPTY( &maxcsn ) && SLAP_GLUE_SUBORDINATE( op->o_bd )) { + /* syncrepl queues the CSN values in the db where + * it is configured , not where the changes are made. + * So look for a value in the glue db if we didn't + * find any in this db. + */ + BackendDB *be = op->o_bd; + op->o_bd = select_backend( &be->be_nsuffix[0], 1); + maxcsn.bv_val = cbuf; + maxcsn.bv_len = sizeof(cbuf); + slap_get_commit_csn( op, &maxcsn, &foundit ); + op->o_bd = be; + } + if ( !BER_BVISEMPTY( &maxcsn ) ) { + int i, sid; +#ifdef CHECK_CSN + Syntax *syn = slap_schema.si_ad_contextCSN->ad_type->sat_syntax; + assert( !syn->ssyn_validate( syn, &maxcsn )); +#endif + sid = slap_parse_csn_sid( &maxcsn ); + for ( i=0; i<si->si_numcsns; i++ ) { + if ( sid < si->si_sids[i] ) + break; + if ( sid == si->si_sids[i] ) { + if ( ber_bvcmp( &maxcsn, &si->si_ctxcsn[i] ) > 0 ) { + ber_bvreplace( &si->si_ctxcsn[i], &maxcsn ); + csn_changed = 1; + } + break; + } + } + /* It's a new SID for us */ + if ( i == si->si_numcsns || sid != si->si_sids[i] ) { + slap_insert_csn_sids((struct sync_cookie *)&(si->si_ctxcsn), + i, sid, &maxcsn ); + csn_changed = 1; + } + } + + /* Don't do any processing for consumer contextCSN updates */ + 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. + */ + csn_changed = syncprov_new_ctxcsn( opc, si, csn_changed, + op->orm_modlist->sml_numvals, op->orm_modlist->sml_values ); + if ( csn_changed ) + 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 ) { + /* Never checkpoint adding the context entry, + * it will deadlock + */ + if ( op->o_tag != LDAP_REQ_ADD || + !dn_match( &op->o_req_ndn, &si->si_contextdn )) { + if ( si->si_chkops && si->si_numops >= si->si_chkops ) { + do_check = 1; + si->si_numops = 0; + } + if ( si->si_chktime && + (op->o_time - si->si_chklast >= si->si_chktime )) { + if ( si->si_chklast ) { + do_check = 1; + si->si_chklast = op->o_time; + } else { + si->si_chklast = 1; + } + } + } + } + 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 ); + ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock ); + } + + /* only update consumer ctx if this is a newer csn */ + if ( csn_changed ) { + opc->sctxcsn = maxcsn; + } + + /* Handle any persistent searches */ + ldap_pvt_thread_mutex_lock( &si->si_ops_mutex ); + have_psearches = ( si->si_ops != NULL ); + ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex ); + if ( have_psearches ) { + switch(op->o_tag) { + case LDAP_REQ_ADD: + case LDAP_REQ_MODIFY: + case LDAP_REQ_MODRDN: + case LDAP_REQ_EXTENDED: + syncprov_matchops( op, opc, 0 ); + break; + case LDAP_REQ_DELETE: + /* for each match in opc->smatches: + * send DELETE msg + */ + for ( sm = opc->smatches; sm; sm=sm->sm_next ) { + if ( sm->sm_op->s_op->o_abandon ) + continue; + syncprov_qresp( opc, sm->sm_op, LDAP_SYNC_DELETE ); + } + if ( opc->ssres.s_info ) + free_resinfo( &opc->ssres ); + break; + } + } + + /* Add any log records */ + if ( si->si_logs ) { + syncprov_add_slog( op ); + } +leave: ldap_pvt_thread_mutex_unlock( &si->si_resp_mutex ); + } + return SLAP_CB_CONTINUE; +} + +/* We don't use a subentry to store the context CSN any more. + * We expose the current context CSN as an operational attribute + * of the suffix entry. + */ +static int +syncprov_op_compare( Operation *op, SlapReply *rs ) +{ + slap_overinst *on = (slap_overinst *)op->o_bd->bd_info; + syncprov_info_t *si = on->on_bi.bi_private; + int rc = SLAP_CB_CONTINUE; + + if ( dn_match( &op->o_req_ndn, &si->si_contextdn ) && + op->oq_compare.rs_ava->aa_desc == slap_schema.si_ad_contextCSN ) + { + Entry e = {0}; + Attribute a = {0}; + + e.e_name = si->si_contextdn; + e.e_nname = si->si_contextdn; + e.e_attrs = &a; + + a.a_desc = slap_schema.si_ad_contextCSN; + + ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock ); + + a.a_vals = si->si_ctxcsn; + a.a_nvals = a.a_vals; + a.a_numvals = si->si_numcsns; + + rs->sr_err = access_allowed( op, &e, op->oq_compare.rs_ava->aa_desc, + &op->oq_compare.rs_ava->aa_value, ACL_COMPARE, NULL ); + if ( ! rs->sr_err ) { + rs->sr_err = LDAP_INSUFFICIENT_ACCESS; + goto return_results; + } + + if ( get_assert( op ) && + ( test_filter( op, &e, get_assertion( op ) ) != LDAP_COMPARE_TRUE ) ) + { + rs->sr_err = LDAP_ASSERTION_FAILED; + goto return_results; + } + + + rs->sr_err = LDAP_COMPARE_FALSE; + + if ( attr_valfind( &a, + SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH | + SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH, + &op->oq_compare.rs_ava->aa_value, NULL, op->o_tmpmemctx ) == 0 ) + { + rs->sr_err = LDAP_COMPARE_TRUE; + } + +return_results:; + + ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock ); + + send_ldap_result( op, rs ); + + if( rs->sr_err == LDAP_COMPARE_FALSE || rs->sr_err == LDAP_COMPARE_TRUE ) { + rs->sr_err = LDAP_SUCCESS; + } + rc = rs->sr_err; + } + + return rc; +} + +static int +syncprov_op_mod( Operation *op, SlapReply *rs ) +{ + slap_overinst *on = (slap_overinst *)op->o_bd->bd_info; + syncprov_info_t *si = on->on_bi.bi_private; + slap_callback *cb; + opcookie *opc; + int have_psearches, cbsize; + + ldap_pvt_thread_mutex_lock( &si->si_ops_mutex ); + have_psearches = ( si->si_ops != NULL ); + si->si_active++; + ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex ); + + cbsize = sizeof(slap_callback) + sizeof(opcookie) + + (have_psearches ? sizeof(modinst) : 0 ); + + cb = op->o_tmpcalloc(1, cbsize, op->o_tmpmemctx); + opc = (opcookie *)(cb+1); + opc->son = on; + cb->sc_response = syncprov_op_response; + cb->sc_cleanup = syncprov_op_cleanup; + cb->sc_private = opc; + cb->sc_next = op->o_callback; + op->o_callback = cb; + + opc->osid = -1; + opc->rsid = -1; + if ( op->o_csn.bv_val ) { + opc->osid = slap_parse_csn_sid( &op->o_csn ); + } + if ( op->o_controls ) { + struct sync_cookie *scook = + op->o_controls[slap_cids.sc_LDAPsync]; + if ( scook ) + opc->rsid = scook->sid; + } + + if ( op->o_dont_replicate ) + return SLAP_CB_CONTINUE; + + /* If there are active persistent searches, lock this operation. + * See seqmod.c for the locking logic on its own. + */ + if ( have_psearches ) { + modtarget *mt, mtdummy; + modinst *mi; + + mi = (modinst *)(opc+1); + mi->mi_op = op; + + /* See if we're already modifying this entry... */ + mtdummy.mt_dn = op->o_req_ndn; +retry: + ldap_pvt_thread_mutex_lock( &si->si_mods_mutex ); + mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp ); + if ( mt ) { + ldap_pvt_thread_mutex_lock( &mt->mt_mutex ); + if ( mt->mt_mods == NULL ) { + /* Cannot reuse this mt, as another thread is about + * to release it in syncprov_op_cleanup. Wait for them + * to finish; our own insert is required to succeed. + */ + ldap_pvt_thread_mutex_unlock( &mt->mt_mutex ); + ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex ); + ldap_pvt_thread_yield(); + goto retry; + } + } + if ( mt ) { + mt->mt_tail->mi_next = mi; + mt->mt_tail = mi; + ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex ); + /* wait for this op to get to head of list */ + while ( mt->mt_mods != mi ) { + modinst *m2; + /* don't wait on other mods from the same thread */ + for ( m2 = mt->mt_mods; m2; m2 = m2->mi_next ) { + if ( m2->mi_op->o_threadctx == op->o_threadctx ) { + break; + } + } + if ( m2 ) + break; + + ldap_pvt_thread_mutex_unlock( &mt->mt_mutex ); + /* FIXME: if dynamic config can delete overlays or + * databases we'll have to check for cleanup here. + * Currently it's not an issue because there are + * no dynamic config deletes... + */ + if ( slapd_shutdown ) + return SLAPD_ABANDON; + + if ( !ldap_pvt_thread_pool_pausecheck( &connection_pool )) + ldap_pvt_thread_yield(); + ldap_pvt_thread_mutex_lock( &mt->mt_mutex ); + + /* clean up if the caller is giving up */ + if ( op->o_abandon ) { + modinst **m2; + slap_callback **sc; + for (m2 = &mt->mt_mods; ; m2 = &(*m2)->mi_next) { + if ( *m2 == mi ) { + *m2 = mi->mi_next; + if ( mt->mt_tail == mi ) + mt->mt_tail = ( m2 == &mt->mt_mods ) ? NULL : (modinst *)m2; + break; + } + } + for (sc = &op->o_callback; ; sc = &(*sc)->sc_next) { + if ( *sc == cb ) { + *sc = cb->sc_next; + break; + } + } + op->o_tmpfree( cb, op->o_tmpmemctx ); + ldap_pvt_thread_mutex_unlock( &mt->mt_mutex ); + return SLAPD_ABANDON; + } + } + ldap_pvt_thread_mutex_unlock( &mt->mt_mutex ); + } else { + /* Record that we're modifying this entry now */ + mt = ch_malloc( sizeof(modtarget) ); + mt->mt_mods = mi; + mt->mt_tail = mi; + ber_dupbv( &mt->mt_dn, &mi->mi_op->o_req_ndn ); + ldap_pvt_thread_mutex_init( &mt->mt_mutex ); + avl_insert( &si->si_mods, mt, sp_avl_cmp, avl_dup_error ); + ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex ); + } + opc->smt = mt; + } + + if (( have_psearches || si->si_logs ) && op->o_tag != LDAP_REQ_ADD ) + syncprov_matchops( op, opc, 1 ); + + return SLAP_CB_CONTINUE; +} + +static int +syncprov_op_extended( Operation *op, SlapReply *rs ) +{ + if ( exop_is_write( op )) + return syncprov_op_mod( op, rs ); + + return SLAP_CB_CONTINUE; +} + +typedef struct searchstate { + slap_overinst *ss_on; + syncops *ss_so; + BerVarray ss_ctxcsn; + int *ss_sids; + int ss_numcsns; +#define SS_PRESENT 0x01 +#define SS_CHANGED 0x02 + int ss_flags; +} searchstate; + +typedef struct SyncOperationBuffer { + Operation sob_op; + Opheader sob_hdr; + OpExtra sob_oe; + AttributeName sob_extra; /* not always present */ + /* Further data allocated here */ +} SyncOperationBuffer; + +static void +syncprov_detach_op( Operation *op, syncops *so, slap_overinst *on ) +{ + SyncOperationBuffer *sopbuf2; + Operation *op2; + int i, alen = 0; + size_t size; + char *ptr; + GroupAssertion *g1, *g2; + + /* count the search attrs */ + for (i=0; op->ors_attrs && !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) { + alen += op->ors_attrs[i].an_name.bv_len + 1; + } + /* Make a new copy of the operation */ + size = offsetof( SyncOperationBuffer, sob_extra ) + + (i ? ( (i+1) * sizeof(AttributeName) + alen) : 0) + + op->o_req_dn.bv_len + 1 + + op->o_req_ndn.bv_len + 1 + + op->o_ndn.bv_len + 1 + + so->s_filterstr.bv_len + 1; + sopbuf2 = ch_calloc( 1, size ); + op2 = &sopbuf2->sob_op; + op2->o_hdr = &sopbuf2->sob_hdr; + LDAP_SLIST_FIRST(&op2->o_extra) = &sopbuf2->sob_oe; + + /* Copy the fields we care about explicitly, leave the rest alone */ + *op2->o_hdr = *op->o_hdr; + op2->o_tag = op->o_tag; + op2->o_time = op->o_time; + op2->o_bd = on->on_info->oi_origdb; + op2->o_request = op->o_request; + op2->o_managedsait = op->o_managedsait; + LDAP_SLIST_FIRST(&op2->o_extra)->oe_key = on; + LDAP_SLIST_NEXT(LDAP_SLIST_FIRST(&op2->o_extra), oe_next) = NULL; + + ptr = (char *) sopbuf2 + offsetof( SyncOperationBuffer, sob_extra ); + if ( i ) { + op2->ors_attrs = (AttributeName *) ptr; + ptr = (char *) &op2->ors_attrs[i+1]; + for (i=0; !BER_BVISNULL( &op->ors_attrs[i].an_name ); i++) { + op2->ors_attrs[i] = op->ors_attrs[i]; + op2->ors_attrs[i].an_name.bv_val = ptr; + ptr = lutil_strcopy( ptr, op->ors_attrs[i].an_name.bv_val ) + 1; + } + BER_BVZERO( &op2->ors_attrs[i].an_name ); + } + + op2->o_authz = op->o_authz; + op2->o_ndn.bv_val = ptr; + ptr = lutil_strcopy(ptr, op->o_ndn.bv_val) + 1; + op2->o_dn = op2->o_ndn; + op2->o_req_dn.bv_len = op->o_req_dn.bv_len; + op2->o_req_dn.bv_val = ptr; + ptr = lutil_strcopy(ptr, op->o_req_dn.bv_val) + 1; + op2->o_req_ndn.bv_len = op->o_req_ndn.bv_len; + op2->o_req_ndn.bv_val = ptr; + ptr = lutil_strcopy(ptr, op->o_req_ndn.bv_val) + 1; + op2->ors_filterstr.bv_val = ptr; + strcpy( ptr, so->s_filterstr.bv_val ); + op2->ors_filterstr.bv_len = so->s_filterstr.bv_len; + + /* Skip the AND/GE clause that we stuck on in front */ + if ( so->s_flags & PS_FIX_FILTER ) { + op2->ors_filter = op->ors_filter->f_and->f_next; + so->s_flags ^= PS_FIX_FILTER; + } else { + op2->ors_filter = op->ors_filter; + } + op2->ors_filter = filter_dup( op2->ors_filter, NULL ); + so->s_op = op2; + + /* Copy any cached group ACLs individually */ + op2->o_groups = NULL; + for ( g1=op->o_groups; g1; g1=g1->ga_next ) { + g2 = ch_malloc( sizeof(GroupAssertion) + g1->ga_len ); + *g2 = *g1; + strcpy( g2->ga_ndn, g1->ga_ndn ); + g2->ga_next = op2->o_groups; + op2->o_groups = g2; + } + /* Don't allow any further group caching */ + op2->o_do_not_cache = 1; + + /* Add op2 to conn so abandon will find us */ + op->o_conn->c_n_ops_executing++; + op->o_conn->c_n_ops_completed--; + LDAP_STAILQ_INSERT_TAIL( &op->o_conn->c_ops, op2, o_next ); + so->s_flags |= PS_IS_DETACHED; + + /* Prevent anyone else from trying to send a result for this op */ + op->o_abandon = 1; +} + +static int +syncprov_search_response( Operation *op, SlapReply *rs ) +{ + searchstate *ss = op->o_callback->sc_private; + slap_overinst *on = ss->ss_on; + syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private; + sync_control *srs = op->o_controls[slap_cids.sc_LDAPsync]; + + if ( rs->sr_type == REP_SEARCH || rs->sr_type == REP_SEARCHREF ) { + Attribute *a; + /* If we got a referral without a referral object, there's + * something missing that we cannot replicate. Just ignore it. + * The consumer will abort because we didn't send the expected + * control. + */ + if ( !rs->sr_entry ) { + assert( rs->sr_entry != NULL ); + Debug( LDAP_DEBUG_ANY, "%s syncprov_search_response: " + "bogus referral in context\n", op->o_log_prefix, 0, 0 ); + return SLAP_CB_CONTINUE; + } + a = attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_entryCSN ); + if ( a == NULL && rs->sr_operational_attrs != NULL ) { + a = attr_find( rs->sr_operational_attrs, slap_schema.si_ad_entryCSN ); + } + if ( a ) { + int i, sid; + sid = slap_parse_csn_sid( &a->a_nvals[0] ); + + /* If not a persistent search */ + if ( !ss->ss_so ) { + /* Make sure entry is less than the snapshot'd contextCSN */ + for ( i=0; i<ss->ss_numcsns; i++ ) { + if ( sid == ss->ss_sids[i] && ber_bvcmp( &a->a_nvals[0], + &ss->ss_ctxcsn[i] ) > 0 ) { + Log4( LDAP_DEBUG_SYNC, ldap_syslog_level, "%s syncprov_search_response: " + "Entry %s CSN %s greater than snapshot %s\n", + op->o_log_prefix, + rs->sr_entry->e_name.bv_val, + a->a_nvals[0].bv_val, + ss->ss_ctxcsn[i].bv_val ); + return LDAP_SUCCESS; + } + } + } + + /* Don't send old entries twice */ + if ( srs->sr_state.ctxcsn ) { + for ( i=0; i<srs->sr_state.numcsns; i++ ) { + if ( sid == srs->sr_state.sids[i] && + ber_bvcmp( &a->a_nvals[0], + &srs->sr_state.ctxcsn[i] )<= 0 ) { + Log4( LDAP_DEBUG_SYNC, ldap_syslog_level, "%s syncprov_search_response: " + "Entry %s CSN %s older or equal to ctx %s\n", + op->o_log_prefix, + rs->sr_entry->e_name.bv_val, + a->a_nvals[0].bv_val, + srs->sr_state.ctxcsn[i].bv_val ); + return LDAP_SUCCESS; + } + } + } + } + rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2, + op->o_tmpmemctx ); + rs->sr_ctrls[1] = NULL; + rs->sr_flags |= REP_CTRLS_MUSTBEFREED; + /* If we're in delta-sync mode, always send a cookie */ + if ( si->si_nopres && si->si_usehint && a ) { + struct berval cookie; + slap_compose_sync_cookie( op, &cookie, a->a_nvals, srs->sr_state.rid, slap_serverID ? slap_serverID : -1 ); + rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry, + LDAP_SYNC_ADD, rs->sr_ctrls, 0, 1, &cookie ); + op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx ); + } else { + rs->sr_err = syncprov_state_ctrl( op, rs, rs->sr_entry, + LDAP_SYNC_ADD, rs->sr_ctrls, 0, 0, NULL ); + } + } else if ( rs->sr_type == REP_RESULT && rs->sr_err == LDAP_SUCCESS ) { + struct berval cookie = BER_BVNULL; + + if ( ( ss->ss_flags & SS_CHANGED ) && + ss->ss_ctxcsn && !BER_BVISNULL( &ss->ss_ctxcsn[0] )) { + slap_compose_sync_cookie( op, &cookie, ss->ss_ctxcsn, + srs->sr_state.rid, slap_serverID ? slap_serverID : -1 ); + + Debug( LDAP_DEBUG_SYNC, "%s syncprov_search_response: cookie=%s\n", + op->o_log_prefix, cookie.bv_val, 0 ); + } + + /* Is this a regular refresh? + * Note: refresh never gets here if there were no changes + */ + if ( !ss->ss_so ) { + rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2, + op->o_tmpmemctx ); + rs->sr_ctrls[1] = NULL; + rs->sr_flags |= REP_CTRLS_MUSTBEFREED; + rs->sr_err = syncprov_done_ctrl( op, rs, rs->sr_ctrls, + 0, 1, &cookie, ( ss->ss_flags & SS_PRESENT ) ? LDAP_SYNC_REFRESH_PRESENTS : + LDAP_SYNC_REFRESH_DELETES ); + op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx ); + } 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, + ( ss->ss_flags & SS_CHANGED ) ? &cookie : NULL, + 1, NULL, 0 ); + if ( !BER_BVISNULL( &cookie )) + op->o_tmpfree( cookie.bv_val, op->o_tmpmemctx ); + + /* Detach this Op from frontend control */ + ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex ); + + /* But not if this connection was closed along the way */ + if ( op->o_abandon ) { + ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex ); + /* syncprov_ab_cleanup will free this syncop */ + return SLAPD_ABANDON; + + } else { + ldap_pvt_thread_mutex_lock( &ss->ss_so->s_mutex ); + /* Turn off the refreshing flag */ + ss->ss_so->s_flags ^= PS_IS_REFRESHING; + + Debug( LDAP_DEBUG_SYNC, "%s syncprov_search_response: " + "detaching op\n", op->o_log_prefix, 0, 0 ); + syncprov_detach_op( op, ss->ss_so, on ); + + ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex ); + + /* If there are queued responses, fire them off */ + if ( ss->ss_so->s_res ) + syncprov_qstart( ss->ss_so ); + ldap_pvt_thread_mutex_unlock( &ss->ss_so->s_mutex ); + } + + return LDAP_SUCCESS; + } + } + + return SLAP_CB_CONTINUE; +} + +static int +syncprov_op_search( Operation *op, SlapReply *rs ) +{ + slap_overinst *on = (slap_overinst *)op->o_bd->bd_info; + syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private; + slap_callback *cb; + int gotstate = 0, changed = 0, do_present = 0; + syncops *sop = NULL; + searchstate *ss; + sync_control *srs; + BerVarray ctxcsn; + int i, *sids, numcsns; + struct berval mincsn, maxcsn; + int minsid, maxsid; + int dirty = 0; + + if ( !(op->o_sync_mode & SLAP_SYNC_REFRESH) ) return SLAP_CB_CONTINUE; + + if ( op->ors_deref & LDAP_DEREF_SEARCHING ) { + send_ldap_error( op, rs, LDAP_PROTOCOL_ERROR, "illegal value for derefAliases" ); + return rs->sr_err; + } + + srs = op->o_controls[slap_cids.sc_LDAPsync]; + Debug( LDAP_DEBUG_SYNC, "%s syncprov_op_search: " + "got a %ssearch with a cookie=%s\n", + op->o_log_prefix, + op->o_sync_mode & SLAP_SYNC_PERSIST ? "persistent ": "", + srs->sr_state.octet_str.bv_val ); + + /* If this is a persistent search, set it up right away */ + if ( op->o_sync_mode & SLAP_SYNC_PERSIST ) { + syncops so = {0}; + fbase_cookie fc; + opcookie opc; + slap_callback sc = {0}; + + fc.fss = &so; + fc.fbase = 0; + so.s_eid = NOID; + so.s_op = op; + so.s_flags = PS_IS_REFRESHING | PS_FIND_BASE; + /* syncprov_findbase expects to be called as a callback... */ + sc.sc_private = &opc; + opc.son = on; + ldap_pvt_thread_mutex_init( &so.s_mutex ); + cb = op->o_callback; + op->o_callback = ≻ + rs->sr_err = syncprov_findbase( op, &fc ); + op->o_callback = cb; + ldap_pvt_thread_mutex_destroy( &so.s_mutex ); + + if ( rs->sr_err != LDAP_SUCCESS ) { + send_ldap_result( op, rs ); + return rs->sr_err; + } + sop = ch_malloc( sizeof( syncops )); + *sop = so; + 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 + * by abandons that occur while we're running here + */ + sop->s_inuse = 2; + + ldap_pvt_thread_mutex_lock( &si->si_ops_mutex ); + while ( si->si_active ) { + /* Wait for active mods to finish before proceeding, as they + * may already have inspected the si_ops list looking for + * consumers to replicate the change to. Using the log + * doesn't help, as we may finish playing it before the + * active mods gets added to it. + */ + ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex ); + if ( slapd_shutdown ) { + ch_free( sop ); + return SLAPD_ABANDON; + } + if ( !ldap_pvt_thread_pool_pausecheck( &connection_pool )) + 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 ); + Debug( LDAP_DEBUG_SYNC, "%s syncprov_op_search: " + "registered persistent search\n", op->o_log_prefix, 0, 0 ); + } + + /* 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; i<numcsns; i++ ) + sids[i] = si->si_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, bail out. + */ + 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; + + /* If there are SIDs we don't recognize in the cookie, drop them */ + for (i=0; i<srs->sr_state.numcsns; ) { + for (j=i; j<numcsns; j++) { + if ( srs->sr_state.sids[i] <= sids[j] ) { + break; + } + } + /* not found */ + if ( j == numcsns || srs->sr_state.sids[i] != sids[j] ) { + char *tmp = srs->sr_state.ctxcsn[i].bv_val; + srs->sr_state.numcsns--; + for ( j=i; j<srs->sr_state.numcsns; j++ ) { + srs->sr_state.ctxcsn[j] = srs->sr_state.ctxcsn[j+1]; + srs->sr_state.sids[j] = srs->sr_state.sids[j+1]; + } + srs->sr_state.ctxcsn[j].bv_val = tmp; + srs->sr_state.ctxcsn[j].bv_len = 0; + continue; + } + i++; + } + + if (srs->sr_state.numcsns != numcsns) { + /* consumer doesn't have the right number of CSNs */ + Debug( LDAP_DEBUG_SYNC, "%s syncprov_op_search: " + "consumer cookie is missing a csn we track\n", + op->o_log_prefix, 0, 0 ); + changed = SS_CHANGED; + if ( srs->sr_state.ctxcsn ) { + ber_bvarray_free_x( srs->sr_state.ctxcsn, op->o_tmpmemctx ); + srs->sr_state.ctxcsn = NULL; + } + if ( srs->sr_state.sids ) { + slap_sl_free( srs->sr_state.sids, op->o_tmpmemctx ); + srs->sr_state.sids = NULL; + } + srs->sr_state.numcsns = 0; + goto shortcut; + } + + /* Find the smallest CSN which differs from contextCSN */ + mincsn.bv_len = 0; + maxcsn.bv_len = 0; + for ( i=0,j=0; i<srs->sr_state.numcsns; i++ ) { + int newer; + while ( srs->sr_state.sids[i] != sids[j] ) j++; + if ( BER_BVISEMPTY( &maxcsn ) || ber_bvcmp( &maxcsn, + &srs->sr_state.ctxcsn[i] ) < 0 ) { + maxcsn = srs->sr_state.ctxcsn[i]; + maxsid = sids[j]; + } + newer = ber_bvcmp( &srs->sr_state.ctxcsn[i], &ctxcsn[j] ); + /* If our state is newer, tell consumer about changes */ + if ( newer < 0) { + changed = SS_CHANGED; + if ( BER_BVISEMPTY( &mincsn ) || ber_bvcmp( &mincsn, + &srs->sr_state.ctxcsn[i] ) > 0 ) { + mincsn = srs->sr_state.ctxcsn[i]; + minsid = sids[j]; + } + } else if ( newer > 0 && sids[j] == slap_serverID ) { + /* our state is older, complain to consumer */ + rs->sr_err = LDAP_UNWILLING_TO_PERFORM; + rs->sr_text = "consumer state is newer than provider!"; + Log5( LDAP_DEBUG_SYNC, ldap_syslog_level, "%s syncprov_op_search: " + "consumer %d state %s is newer than provider %d state %s\n", + op->o_log_prefix, 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; + + ldap_pvt_thread_mutex_lock( &si->si_ops_mutex ); + while ( *sp != sop ) + sp = &(*sp)->s_next; + *sp = sop->s_next; + ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex ); + ch_free( sop ); + } + rs->sr_ctrls = NULL; + send_ldap_result( op, rs ); + return rs->sr_err; + } + } + if ( BER_BVISEMPTY( &mincsn )) { + mincsn = maxcsn; + minsid = maxsid; + } + + /* If nothing has changed, shortcut it */ + if ( !changed && !dirty ) { + do_present = 0; +no_change: if ( !(op->o_sync_mode & SLAP_SYNC_PERSIST) ) { + LDAPControl *ctrls[2]; + + ctrls[0] = NULL; + ctrls[1] = NULL; + syncprov_done_ctrl( op, rs, ctrls, 0, 0, + NULL, LDAP_SYNC_REFRESH_DELETES ); + rs->sr_ctrls = ctrls; + rs->sr_err = LDAP_SUCCESS; + send_ldap_result( op, rs ); + rs->sr_ctrls = NULL; + return rs->sr_err; + } + Debug( LDAP_DEBUG_SYNC, "%s syncprov_op_search: " + "no change, skipping log replay\n", + op->o_log_prefix, 0, 0 ); + goto shortcut; + } + + /* Do we have a sessionlog for this search? */ + sl=si->si_logs; + if ( sl ) { + int do_play = 0; + ldap_pvt_thread_rdwr_wlock( &sl->sl_mutex ); + /* Are there any log entries, and is the consumer state + * present in the session log? + */ + if ( sl->sl_num > 0 ) { + int i; + for ( i=0; i<sl->sl_numcsns; i++ ) { + /* SID not present == new enough */ + if ( minsid < sl->sl_sids[i] ) { + do_play = 1; + break; + } + /* SID present */ + if ( minsid == sl->sl_sids[i] ) { + /* new enough? */ + if ( ber_bvcmp( &mincsn, &sl->sl_mincsn[i] ) >= 0 ) + do_play = 1; + break; + } + } + /* SID not present == new enough */ + if ( i == sl->sl_numcsns ) + do_play = 1; + } + if ( do_play ) { + do_present = 0; + /* mutex is unlocked in playlog */ + syncprov_playlog( op, rs, sl, srs, ctxcsn, numcsns, sids, &mincsn ); + } else { + ldap_pvt_thread_rdwr_wunlock( &sl->sl_mutex ); + } + } + /* Is the CSN still present in the database? */ + if ( syncprov_findcsn( op, FIND_CSN, &mincsn ) != LDAP_SUCCESS ) { + /* No, so a reload is required */ + /* the 2.2 consumer doesn't send this hint */ + if ( si->si_usehint && srs->sr_rhint == 0 ) { + if ( ctxcsn ) + ber_bvarray_free_x( ctxcsn, op->o_tmpmemctx ); + if ( sids ) + op->o_tmpfree( sids, op->o_tmpmemctx ); + rs->sr_err = LDAP_SYNC_REFRESH_REQUIRED; + rs->sr_text = "sync cookie is stale"; + goto bailout; + } + Debug( LDAP_DEBUG_SYNC, "%s syncprov_op_search: " + "failed to find entry with csn=%s, ignoring cookie\n", + op->o_log_prefix, mincsn.bv_val, 0 ); + if ( srs->sr_state.ctxcsn ) { + ber_bvarray_free_x( srs->sr_state.ctxcsn, op->o_tmpmemctx ); + srs->sr_state.ctxcsn = NULL; + } + if ( srs->sr_state.sids ) { + slap_sl_free( srs->sr_state.sids, op->o_tmpmemctx ); + srs->sr_state.sids = NULL; + } + srs->sr_state.numcsns = 0; + } else { + gotstate = 1; + /* If changed and doing Present lookup, send Present UUIDs */ + if ( do_present && syncprov_findcsn( op, FIND_PRESENT, 0 ) != + LDAP_SUCCESS ) { + if ( ctxcsn ) + ber_bvarray_free_x( ctxcsn, op->o_tmpmemctx ); + if ( sids ) + op->o_tmpfree( sids, op->o_tmpmemctx ); + goto bailout; + } + } + } else { + /* The consumer knows nothing, we know nothing. OK. */ + if (!numcsns) + goto no_change; + /* No consumer state, assume something has changed */ + changed = SS_CHANGED; + } + +shortcut: + /* Append CSN range to search filter, save original filter + * for persistent search evaluation + */ + if ( sop ) { + ldap_pvt_thread_mutex_lock( &sop->s_mutex ); + sop->s_filterstr = op->ors_filterstr; + /* correct the refcount that was set to 2 before */ + sop->s_inuse--; + } + + /* If something changed, find the changes */ + if ( gotstate && ( changed || dirty ) ) { + Filter *fand, *fava; + + fand = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx ); + fand->f_choice = LDAP_FILTER_AND; + fand->f_next = NULL; + fava = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx ); + fand->f_and = fava; + fava->f_choice = LDAP_FILTER_GE; + fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx ); + fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN; +#ifdef LDAP_COMP_MATCH + fava->f_ava->aa_cf = NULL; +#endif + ber_dupbv_x( &fava->f_ava->aa_value, &mincsn, op->o_tmpmemctx ); + fava->f_next = op->ors_filter; + op->ors_filter = fand; + filter2bv_x( op, op->ors_filter, &op->ors_filterstr ); + if ( sop ) { + sop->s_flags |= PS_FIX_FILTER; + } + } + if ( sop ) { + ldap_pvt_thread_mutex_unlock( &sop->s_mutex ); + } + + /* Let our callback add needed info to returned entries */ + cb = op->o_tmpcalloc(1, sizeof(slap_callback)+sizeof(searchstate), op->o_tmpmemctx); + ss = (searchstate *)(cb+1); + ss->ss_on = on; + ss->ss_so = sop; + ss->ss_flags = do_present | changed; + ss->ss_ctxcsn = ctxcsn; + ss->ss_numcsns = numcsns; + ss->ss_sids = sids; + cb->sc_response = syncprov_search_response; + cb->sc_private = ss; + cb->sc_next = op->o_callback; + op->o_callback = cb; + + /* If this is a persistent search and no changes were reported during + * the refresh phase, just invoke the response callback to transition + * us into persist phase + */ + if ( !changed && !dirty ) { + Debug( LDAP_DEBUG_SYNC, "%s syncprov_op_search: " + "nothing changed, finishing up initial search early\n", + op->o_log_prefix, 0, 0 ); + rs->sr_err = LDAP_SUCCESS; + rs->sr_nentries = 0; + send_ldap_result( op, rs ); + return rs->sr_err; + } + return SLAP_CB_CONTINUE; +} + +static int +syncprov_operational( + Operation *op, + SlapReply *rs ) +{ + slap_overinst *on = (slap_overinst *)op->o_bd->bd_info; + syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private; + + /* This prevents generating unnecessarily; frontend will strip + * any statically stored copy. + */ + if ( op->o_sync != SLAP_CONTROL_NONE ) + return SLAP_CB_CONTINUE; + + if ( rs->sr_entry && + dn_match( &rs->sr_entry->e_nname, &si->si_contextdn )) { + + if ( SLAP_OPATTRS( rs->sr_attr_flags ) || + ad_inlist( slap_schema.si_ad_contextCSN, rs->sr_attrs )) { + Attribute *a, **ap = NULL; + + for ( a=rs->sr_entry->e_attrs; a; a=a->a_next ) { + if ( a->a_desc == slap_schema.si_ad_contextCSN ) + break; + } + + ldap_pvt_thread_rdwr_rlock( &si->si_csn_rwlock ); + if ( si->si_ctxcsn ) { + if ( !a ) { + for ( ap = &rs->sr_operational_attrs; *ap; + ap=&(*ap)->a_next ); + + a = attr_alloc( slap_schema.si_ad_contextCSN ); + *ap = a; + } + + if ( !ap ) { + if ( rs_entry2modifiable( op, rs, on )) { + a = attr_find( rs->sr_entry->e_attrs, + slap_schema.si_ad_contextCSN ); + } + if ( a->a_nvals != a->a_vals ) { + ber_bvarray_free( a->a_nvals ); + } + a->a_nvals = NULL; + ber_bvarray_free( a->a_vals ); + a->a_vals = NULL; + a->a_numvals = 0; + } + attr_valadd( a, si->si_ctxcsn, si->si_ctxcsn, si->si_numcsns ); + } + ldap_pvt_thread_rdwr_runlock( &si->si_csn_rwlock ); + } + } + return SLAP_CB_CONTINUE; +} + +enum { + SP_CHKPT = 1, + SP_SESSL, + SP_NOPRES, + SP_USEHINT +}; + +static ConfigDriver sp_cf_gen; + +static ConfigTable spcfg[] = { + { "syncprov-checkpoint", "ops> <minutes", 3, 3, 0, ARG_MAGIC|SP_CHKPT, + sp_cf_gen, "( OLcfgOvAt:1.1 NAME 'olcSpCheckpoint' " + "DESC 'ContextCSN checkpoint interval in ops and minutes' " + "SYNTAX OMsDirectoryString SINGLE-VALUE )", NULL, NULL }, + { "syncprov-sessionlog", "ops", 2, 2, 0, ARG_INT|ARG_MAGIC|SP_SESSL, + sp_cf_gen, "( OLcfgOvAt:1.2 NAME 'olcSpSessionlog' " + "DESC 'Session log size in ops' " + "SYNTAX OMsInteger SINGLE-VALUE )", NULL, NULL }, + { "syncprov-nopresent", NULL, 2, 2, 0, ARG_ON_OFF|ARG_MAGIC|SP_NOPRES, + sp_cf_gen, "( OLcfgOvAt:1.3 NAME 'olcSpNoPresent' " + "DESC 'Omit Present phase processing' " + "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL }, + { "syncprov-reloadhint", NULL, 2, 2, 0, ARG_ON_OFF|ARG_MAGIC|SP_USEHINT, + sp_cf_gen, "( OLcfgOvAt:1.4 NAME 'olcSpReloadHint' " + "DESC 'Observe Reload Hint in Request control' " + "SYNTAX OMsBoolean SINGLE-VALUE )", NULL, NULL }, + { NULL, NULL, 0, 0, 0, ARG_IGNORED } +}; + +static ConfigOCs spocs[] = { + { "( OLcfgOvOc:1.1 " + "NAME 'olcSyncProvConfig' " + "DESC 'SyncRepl Provider configuration' " + "SUP olcOverlayConfig " + "MAY ( olcSpCheckpoint " + "$ olcSpSessionlog " + "$ olcSpNoPresent " + "$ olcSpReloadHint " + ") )", + Cft_Overlay, spcfg }, + { NULL, 0, NULL } +}; + +static int +sp_cf_gen(ConfigArgs *c) +{ + slap_overinst *on = (slap_overinst *)c->bi; + syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private; + int rc = 0; + + if ( c->op == SLAP_CONFIG_EMIT ) { + switch ( c->type ) { + case SP_CHKPT: + if ( si->si_chkops || si->si_chktime ) { + struct berval bv; + /* we assume si_chktime is a multiple of 60 + * because the parsed value was originally + * multiplied by 60 */ + bv.bv_len = snprintf( c->cr_msg, sizeof( c->cr_msg ), + "%d %d", si->si_chkops, si->si_chktime/60 ); + if ( bv.bv_len >= sizeof( c->cr_msg ) ) { + rc = 1; + } else { + bv.bv_val = c->cr_msg; + value_add_one( &c->rvalue_vals, &bv ); + } + } else { + rc = 1; + } + break; + case SP_SESSL: + if ( si->si_logs ) { + c->value_int = si->si_logs->sl_size; + } else { + rc = 1; + } + break; + case SP_NOPRES: + if ( si->si_nopres ) { + c->value_int = 1; + } else { + rc = 1; + } + break; + case SP_USEHINT: + if ( si->si_usehint ) { + c->value_int = 1; + } else { + rc = 1; + } + break; + } + return rc; + } else if ( c->op == LDAP_MOD_DELETE ) { + switch ( c->type ) { + case SP_CHKPT: + si->si_chkops = 0; + si->si_chktime = 0; + break; + case SP_SESSL: + si->si_logs->sl_size = 0; + break; + case SP_NOPRES: + si->si_nopres = 0; + break; + case SP_USEHINT: + si->si_usehint = 0; + break; + } + return rc; + } + switch ( c->type ) { + case SP_CHKPT: + if ( lutil_atoi( &si->si_chkops, c->argv[1] ) != 0 ) { + snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse checkpoint ops # \"%s\"", + c->argv[0], c->argv[1] ); + Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE, + "%s: %s\n", c->log, c->cr_msg, 0 ); + return ARG_BAD_CONF; + } + if ( si->si_chkops <= 0 ) { + snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s invalid checkpoint ops # \"%d\"", + c->argv[0], si->si_chkops ); + Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE, + "%s: %s\n", c->log, c->cr_msg, 0 ); + return ARG_BAD_CONF; + } + if ( lutil_atoi( &si->si_chktime, c->argv[2] ) != 0 ) { + snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s unable to parse checkpoint time \"%s\"", + c->argv[0], c->argv[1] ); + Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE, + "%s: %s\n", c->log, c->cr_msg, 0 ); + return ARG_BAD_CONF; + } + if ( si->si_chktime <= 0 ) { + snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s invalid checkpoint time \"%d\"", + c->argv[0], si->si_chkops ); + Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE, + "%s: %s\n", c->log, c->cr_msg, 0 ); + return ARG_BAD_CONF; + } + si->si_chktime *= 60; + break; + case SP_SESSL: { + sessionlog *sl; + int size = c->value_int; + + if ( size < 0 ) { + snprintf( c->cr_msg, sizeof( c->cr_msg ), "%s size %d is negative", + c->argv[0], size ); + Debug( LDAP_DEBUG_CONFIG|LDAP_DEBUG_NONE, + "%s: %s\n", c->log, c->cr_msg, 0 ); + return ARG_BAD_CONF; + } + sl = si->si_logs; + if ( !sl ) { + sl = ch_calloc( 1, sizeof( sessionlog )); + ldap_pvt_thread_rdwr_init( &sl->sl_mutex ); + si->si_logs = sl; + } + sl->sl_size = size; + } + break; + case SP_NOPRES: + si->si_nopres = c->value_int; + break; + case SP_USEHINT: + si->si_usehint = c->value_int; + break; + } + return rc; +} + +/* ITS#3456 we cannot run this search on the main thread, must use a + * child thread in order to insure we have a big enough stack. + */ +static void * +syncprov_db_otask( + void *ptr +) +{ + syncprov_findcsn( ptr, FIND_MAXCSN, 0 ); + return NULL; +} + +static int +syncprov_db_ocallback( + Operation *op, + SlapReply *rs +) +{ + if ( rs->sr_type == REP_SEARCH && rs->sr_err == LDAP_SUCCESS ) { + if ( rs->sr_entry->e_name.bv_len ) + op->o_callback->sc_private = (void *)1; + } + return LDAP_SUCCESS; +} + +/* ITS#9015 see if the DB is really empty */ +static void * +syncprov_db_otask2( + void *ptr +) +{ + Operation *op = ptr; + SlapReply rs = {REP_RESULT}; + slap_callback cb = {0}; + int rc; + + cb.sc_response = syncprov_db_ocallback; + + op->o_managedsait = SLAP_CONTROL_CRITICAL; + op->o_callback = &cb; + op->o_tag = LDAP_REQ_SEARCH; + op->ors_scope = LDAP_SCOPE_SUBTREE; + op->ors_limit = NULL; + op->ors_slimit = 1; + op->ors_tlimit = SLAP_NO_LIMIT; + op->ors_attrs = slap_anlist_no_attrs; + op->ors_attrsonly = 1; + op->ors_deref = LDAP_DEREF_NEVER; + op->ors_filter = &generic_filter; + op->ors_filterstr = generic_filterstr; + rc = op->o_bd->be_search( op, &rs ); + if ( rc == LDAP_SIZELIMIT_EXCEEDED || cb.sc_private ) + op->ors_slimit = 2; + return NULL; +} + +/* Read any existing contextCSN from the underlying db. + * Then search for any entries newer than that. If no value exists, + * just generate it. Cache whatever result. + */ +static int +syncprov_db_open( + BackendDB *be, + ConfigReply *cr +) +{ + slap_overinst *on = (slap_overinst *) be->bd_info; + syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private; + + Connection conn = { 0 }; + OperationBuffer opbuf; + Operation *op; + Entry *e = NULL; + Attribute *a; + int rc; + void *thrctx = NULL; + + if ( !SLAP_LASTMOD( be )) { + Debug( LDAP_DEBUG_ANY, + "syncprov_db_open: invalid config, lastmod must be enabled\n", 0, 0, 0 ); + return -1; + } + + if ( slapMode & SLAP_TOOL_MODE ) { + return 0; + } + + rc = overlay_register_control( be, LDAP_CONTROL_SYNC ); + if ( rc ) { + return rc; + } + + Debug( LDAP_DEBUG_SYNC, "syncprov_db_open: " + "starting syncprov for suffix %s\n", + be->be_suffix[0].bv_val, 0, 0 ); + + thrctx = ldap_pvt_thread_pool_context(); + connection_fake_init2( &conn, &opbuf, thrctx, 0 ); + op = &opbuf.ob_op; + op->o_bd = be; + op->o_dn = be->be_rootdn; + op->o_ndn = be->be_rootndn; + + if ( SLAP_SYNC_SUBENTRY( be )) { + build_new_dn( &si->si_contextdn, be->be_nsuffix, + (struct berval *)&slap_ldapsync_cn_bv, NULL ); + } else { + si->si_contextdn = be->be_nsuffix[0]; + } + rc = overlay_entry_get_ov( op, &si->si_contextdn, NULL, + slap_schema.si_ad_contextCSN, 0, &e, on ); + + if ( e ) { + ldap_pvt_thread_t tid; + + a = attr_find( e->e_attrs, slap_schema.si_ad_contextCSN ); + if ( a ) { + ber_bvarray_dup_x( &si->si_ctxcsn, a->a_vals, NULL ); + si->si_numcsns = a->a_numvals; + si->si_sids = slap_parse_csn_sids( si->si_ctxcsn, a->a_numvals, NULL ); + slap_sort_csn_sids( si->si_ctxcsn, si->si_sids, si->si_numcsns, NULL ); + } + overlay_entry_release_ov( op, e, 0, on ); + if ( si->si_ctxcsn && !SLAP_DBCLEAN( be )) { + op->o_tag = LDAP_REQ_SEARCH; + op->o_req_dn = be->be_suffix[0]; + op->o_req_ndn = be->be_nsuffix[0]; + op->ors_scope = LDAP_SCOPE_SUBTREE; + ldap_pvt_thread_create( &tid, 0, syncprov_db_otask, op ); + ldap_pvt_thread_join( tid, NULL ); + } + } + + /* Didn't find a contextCSN, should we generate one? */ + if ( !si->si_ctxcsn ) { + char csnbuf[ LDAP_PVT_CSNSTR_BUFSIZE ]; + struct berval csn; + + if ( SLAP_SINGLE_SHADOW( op->o_bd ) ) { + /* Not in charge of this serverID, don't generate anything. */ + goto out; + } + if ( !SLAP_SYNC_SUBENTRY( be ) && rc != LDAP_SUCCESS + && rc != LDAP_NO_SUCH_ATTRIBUTE ) { + /* If the DB is genuinely empty, don't generate one either. */ + goto out; + } + if ( !si->si_contextdn.bv_len ) { + ldap_pvt_thread_t tid; + /* a glue entry here with no contextCSN might mean an empty DB. + * we need to search for children, to be sure. + */ + op->o_req_dn = be->be_suffix[0]; + op->o_req_ndn = be->be_nsuffix[0]; + op->o_bd->bd_info = (BackendInfo *)on->on_info; + ldap_pvt_thread_create( &tid, 0, syncprov_db_otask2, op ); + ldap_pvt_thread_join( tid, NULL ); + if ( op->ors_slimit == 1 ) + goto out; + } + + csn.bv_val = csnbuf; + csn.bv_len = sizeof( csnbuf ); + slap_get_csn( op, &csn, 0 ); + value_add_one( &si->si_ctxcsn, &csn ); + si->si_numcsns = 1; + si->si_sids = ch_malloc( sizeof(int) ); + si->si_sids[0] = slap_serverID; + Debug( LDAP_DEBUG_SYNC, "syncprov_db_open: " + "generated a new ctxcsn=%s for suffix %s\n", + csn.bv_val, be->be_suffix[0].bv_val, 0 ); + + /* make sure we do a checkpoint on close */ + si->si_numops++; + } + + /* Initialize the sessionlog mincsn */ + if ( si->si_logs && si->si_numcsns ) { + sessionlog *sl = si->si_logs; + int i; + ber_bvarray_dup_x( &sl->sl_mincsn, si->si_ctxcsn, NULL ); + sl->sl_numcsns = si->si_numcsns; + sl->sl_sids = ch_malloc( si->si_numcsns * sizeof(int) ); + for ( i=0; i < si->si_numcsns; i++ ) + sl->sl_sids[i] = si->si_sids[i]; + } + +out: + op->o_bd->bd_info = (BackendInfo *)on; + return 0; +} + +/* Write the current contextCSN into the underlying db. + */ +static int +syncprov_db_close( + BackendDB *be, + ConfigReply *cr +) +{ + 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 */ + + if ( slapMode & SLAP_TOOL_MODE ) { + return 0; + } + if ( si->si_numops ) { + Connection conn = {0}; + OperationBuffer opbuf; + Operation *op; + void *thrctx; + + thrctx = ldap_pvt_thread_pool_context(); + connection_fake_init2( &conn, &opbuf, thrctx, 0 ); + op = &opbuf.ob_op; + op->o_bd = be; + op->o_dn = be->be_rootdn; + op->o_ndn = be->be_rootndn; + syncprov_checkpoint( op, on ); + } + +#ifdef SLAP_CONFIG_DELETE + if ( !slapd_shutdown ) { + ldap_pvt_thread_mutex_lock( &si->si_ops_mutex ); + for ( so=si->si_ops, sonext=so; so; so=sonext ) { + SlapReply rs = {REP_RESULT}; + rs.sr_err = LDAP_UNAVAILABLE; + send_ldap_result( so->s_op, &rs ); + sonext=so->s_next; + syncprov_drop_psearch( so, 0); + } + si->si_ops=NULL; + ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex ); + } + overlay_unregister_control( be, LDAP_CONTROL_SYNC ); +#endif /* SLAP_CONFIG_DELETE */ + + return 0; +} + +static int +syncprov_db_init( + BackendDB *be, + ConfigReply *cr +) +{ + slap_overinst *on = (slap_overinst *)be->bd_info; + syncprov_info_t *si; + + if ( SLAP_ISGLOBALOVERLAY( be ) ) { + Debug( LDAP_DEBUG_ANY, + "syncprov must be instantiated within a database.\n", + 0, 0, 0 ); + return 1; + } + + si = ch_calloc(1, sizeof(syncprov_info_t)); + on->on_bi.bi_private = si; + ldap_pvt_thread_rdwr_init( &si->si_csn_rwlock ); + ldap_pvt_thread_mutex_init( &si->si_ops_mutex ); + ldap_pvt_thread_mutex_init( &si->si_mods_mutex ); + ldap_pvt_thread_mutex_init( &si->si_resp_mutex ); + + csn_anlist[0].an_desc = slap_schema.si_ad_entryCSN; + csn_anlist[0].an_name = slap_schema.si_ad_entryCSN->ad_cname; + csn_anlist[1].an_desc = slap_schema.si_ad_entryUUID; + csn_anlist[1].an_name = slap_schema.si_ad_entryUUID->ad_cname; + + uuid_anlist[0].an_desc = slap_schema.si_ad_entryUUID; + uuid_anlist[0].an_name = slap_schema.si_ad_entryUUID->ad_cname; + + return 0; +} + +static int +syncprov_db_destroy( + BackendDB *be, + ConfigReply *cr +) +{ + slap_overinst *on = (slap_overinst *)be->bd_info; + syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private; + + if ( si ) { + if ( si->si_logs ) { + sessionlog *sl = si->si_logs; + + tavl_free( sl->sl_entries, (AVL_FREE)ch_free ); + if ( sl->sl_mincsn ) + ber_bvarray_free( sl->sl_mincsn ); + if ( sl->sl_sids ) + ch_free( sl->sl_sids ); + + ldap_pvt_thread_rdwr_destroy(&si->si_logs->sl_mutex); + ch_free( si->si_logs ); + } + if ( si->si_ctxcsn ) + ber_bvarray_free( si->si_ctxcsn ); + if ( si->si_sids ) + ch_free( si->si_sids ); + ldap_pvt_thread_mutex_destroy( &si->si_resp_mutex ); + ldap_pvt_thread_mutex_destroy( &si->si_mods_mutex ); + ldap_pvt_thread_mutex_destroy( &si->si_ops_mutex ); + ldap_pvt_thread_rdwr_destroy( &si->si_csn_rwlock ); + ch_free( si ); + } + + return 0; +} + +static int syncprov_parseCtrl ( + Operation *op, + SlapReply *rs, + LDAPControl *ctrl ) +{ + ber_tag_t tag; + BerElementBuffer berbuf; + BerElement *ber = (BerElement *)&berbuf; + ber_int_t mode; + ber_len_t len; + struct berval cookie = BER_BVNULL; + sync_control *sr; + int rhint = 0; + + if ( op->o_sync != SLAP_CONTROL_NONE ) { + rs->sr_text = "Sync control specified multiple times"; + return LDAP_PROTOCOL_ERROR; + } + + if ( op->o_pagedresults != SLAP_CONTROL_NONE ) { + rs->sr_text = "Sync control specified with pagedResults control"; + return LDAP_PROTOCOL_ERROR; + } + + if ( BER_BVISNULL( &ctrl->ldctl_value ) ) { + rs->sr_text = "Sync control value is absent"; + return LDAP_PROTOCOL_ERROR; + } + + if ( BER_BVISEMPTY( &ctrl->ldctl_value ) ) { + rs->sr_text = "Sync control value is empty"; + return LDAP_PROTOCOL_ERROR; + } + + /* Parse the control value + * syncRequestValue ::= SEQUENCE { + * mode ENUMERATED { + * -- 0 unused + * refreshOnly (1), + * -- 2 reserved + * refreshAndPersist (3) + * }, + * cookie syncCookie OPTIONAL + * } + */ + + ber_init2( ber, &ctrl->ldctl_value, 0 ); + + if ( (tag = ber_scanf( ber, "{i" /*}*/, &mode )) == LBER_ERROR ) { + rs->sr_text = "Sync control : mode decoding error"; + return LDAP_PROTOCOL_ERROR; + } + + switch( mode ) { + case LDAP_SYNC_REFRESH_ONLY: + mode = SLAP_SYNC_REFRESH; + break; + case LDAP_SYNC_REFRESH_AND_PERSIST: + mode = SLAP_SYNC_REFRESH_AND_PERSIST; + break; + default: + rs->sr_text = "Sync control : unknown update mode"; + return LDAP_PROTOCOL_ERROR; + } + + tag = ber_peek_tag( ber, &len ); + + if ( tag == LDAP_TAG_SYNC_COOKIE ) { + if (( ber_scanf( ber, /*{*/ "m", &cookie )) == LBER_ERROR ) { + rs->sr_text = "Sync control : cookie decoding error"; + return LDAP_PROTOCOL_ERROR; + } + tag = ber_peek_tag( ber, &len ); + } + if ( tag == LDAP_TAG_RELOAD_HINT ) { + if (( ber_scanf( ber, /*{*/ "b", &rhint )) == LBER_ERROR ) { + rs->sr_text = "Sync control : rhint decoding error"; + return LDAP_PROTOCOL_ERROR; + } + } + if (( ber_scanf( ber, /*{*/ "}")) == LBER_ERROR ) { + rs->sr_text = "Sync control : decoding error"; + return LDAP_PROTOCOL_ERROR; + } + sr = op->o_tmpcalloc( 1, sizeof(struct sync_control), op->o_tmpmemctx ); + sr->sr_rhint = rhint; + if (!BER_BVISNULL(&cookie)) { + ber_dupbv_x( &sr->sr_state.octet_str, &cookie, op->o_tmpmemctx ); + /* If parse fails, pretend no cookie was sent */ + if ( slap_parse_sync_cookie( &sr->sr_state, op->o_tmpmemctx ) || + sr->sr_state.rid == -1 ) { + if ( sr->sr_state.ctxcsn ) { + ber_bvarray_free_x( sr->sr_state.ctxcsn, op->o_tmpmemctx ); + sr->sr_state.ctxcsn = NULL; + } + sr->sr_state.numcsns = 0; + } + } + + op->o_controls[slap_cids.sc_LDAPsync] = sr; + + op->o_sync = ctrl->ldctl_iscritical + ? SLAP_CONTROL_CRITICAL + : SLAP_CONTROL_NONCRITICAL; + + op->o_sync_mode |= mode; /* o_sync_mode shares o_sync */ + + return LDAP_SUCCESS; +} + +/* This overlay is set up for dynamic loading via moduleload. For static + * configuration, you'll need to arrange for the slap_overinst to be + * initialized and registered by some other function inside slapd. + */ + +static slap_overinst syncprov; + +int +syncprov_initialize() +{ + int rc; + + rc = register_supported_control( LDAP_CONTROL_SYNC, + SLAP_CTRL_SEARCH, NULL, + syncprov_parseCtrl, &slap_cids.sc_LDAPsync ); + if ( rc != LDAP_SUCCESS ) { + Debug( LDAP_DEBUG_ANY, + "syncprov_init: Failed to register control %d\n", rc, 0, 0 ); + return rc; + } + + syncprov.on_bi.bi_type = "syncprov"; + syncprov.on_bi.bi_db_init = syncprov_db_init; + syncprov.on_bi.bi_db_destroy = syncprov_db_destroy; + syncprov.on_bi.bi_db_open = syncprov_db_open; + syncprov.on_bi.bi_db_close = syncprov_db_close; + + syncprov.on_bi.bi_op_abandon = syncprov_op_abandon; + syncprov.on_bi.bi_op_cancel = syncprov_op_abandon; + + syncprov.on_bi.bi_op_add = syncprov_op_mod; + syncprov.on_bi.bi_op_compare = syncprov_op_compare; + syncprov.on_bi.bi_op_delete = syncprov_op_mod; + syncprov.on_bi.bi_op_modify = syncprov_op_mod; + syncprov.on_bi.bi_op_modrdn = syncprov_op_mod; + syncprov.on_bi.bi_op_search = syncprov_op_search; + syncprov.on_bi.bi_extended = syncprov_op_extended; + syncprov.on_bi.bi_operational = syncprov_operational; + + syncprov.on_bi.bi_cf_ocs = spocs; + + generic_filter.f_desc = slap_schema.si_ad_objectClass; + + rc = config_register_schema( spcfg, spocs ); + if ( rc ) return rc; + + return overlay_register( &syncprov ); +} + +#if SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC +int +init_module( int argc, char *argv[] ) +{ + return syncprov_initialize(); +} +#endif /* SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC */ + +#endif /* defined(SLAPD_OVER_SYNCPROV) */ |