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openldap/servers/slapd/overlays/syncprov.c

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/* $OpenLDAP$ */
/* syncprov.c - syncrepl provider */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
* Copyright 2004-2005 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"
/* 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;
Operation *mt_op;
ldap_pvt_thread_mutex_t mt_mutex;
} modtarget;
/* A queued result of a persistent search */
typedef struct syncres {
struct syncres *s_next;
struct berval s_dn;
struct berval s_ndn;
struct berval s_uuid;
struct berval s_csn;
char s_mode;
char s_isreference;
} syncres;
/* Record of a persistent search */
typedef struct syncops {
struct syncops *s_next;
struct berval s_base; /* ndn of search base */
ID s_eid; /* entryID of search base */
Operation *s_op; /* search op */
int s_rid;
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
int s_inuse; /* reference count */
struct syncres *s_res;
struct syncres *s_restail;
struct re_s *s_qtask; /* task for playing psearch responses */
#define RUNQ_INTERVAL 36000 /* a long time */
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 slog_entry *se_next;
struct berval se_uuid;
struct berval se_csn;
ber_tag_t se_tag;
} slog_entry;
typedef struct sessionlog {
struct berval sl_mincsn;
int sl_num;
int sl_size;
slog_entry *sl_head;
slog_entry *sl_tail;
ldap_pvt_thread_mutex_t sl_mutex;
} sessionlog;
/* The main state for this overlay */
typedef struct syncprov_info_t {
syncops *si_ops;
struct berval si_ctxcsn; /* ldapsync context */
int si_chkops; /* checkpointing info */
int si_chktime;
int si_numops; /* number of ops since last checkpoint */
int si_nopres; /* Skip present phase */
time_t si_chklast; /* time of last checkpoint */
Avlnode *si_mods; /* entries being modified */
sessionlog *si_logs;
ldap_pvt_thread_mutex_t si_csn_mutex;
ldap_pvt_thread_mutex_t si_ops_mutex;
ldap_pvt_thread_mutex_t si_mods_mutex;
char si_ctxcsnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
} syncprov_info_t;
typedef struct opcookie {
slap_overinst *son;
syncmatches *smatches;
struct berval sdn; /* DN of entry, for deletes */
struct berval sndn;
struct berval suuid; /* UUID of entry */
struct berval sctxcsn;
int sreference; /* Is the entry a reference? */
} 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;
struct berval entryuuid_bv = BER_BVNULL;
ber_init2( ber, 0, LBER_USE_DER );
ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
ctrls[num_ctrls] = op->o_tmpalloc( sizeof ( LDAPControl ), 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 );
}
ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_STATE;
ctrls[num_ctrls]->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL);
ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
ber_free_buf( ber );
if ( ret < 0 ) {
Debug( LDAP_DEBUG_TRACE,
"slap_build_sync_ctrl: ber_flatten2 failed\n",
0, 0, 0 );
send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
return ret;
}
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;
ber_init2( ber, NULL, LBER_USE_DER );
ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
ctrls[num_ctrls] = op->o_tmpalloc( sizeof ( LDAPControl ), 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}" );
ctrls[num_ctrls]->ldctl_oid = LDAP_CONTROL_SYNC_DONE;
ctrls[num_ctrls]->ldctl_iscritical = (op->o_sync == SLAP_CONTROL_CRITICAL);
ret = ber_flatten2( ber, &ctrls[num_ctrls]->ldctl_value, 1 );
ber_free_buf( ber );
if ( ret < 0 ) {
Debug( LDAP_DEBUG_TRACE,
"syncprov_done_ctrl: ber_flatten2 failed\n",
0, 0, 0 );
send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
return ret;
}
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:
ber_printf( ber, "tO", type, cookie );
break;
case LDAP_TAG_SYNC_REFRESH_DELETE:
case LDAP_TAG_SYNC_REFRESH_PRESENT:
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:
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,
"syncprov_sendinfo: invalid syncinfo type (%d)\n",
type, 0, 0 );
return LDAP_OTHER;
}
}
ret = ber_flatten2( ber, &rspdata, 0 );
if ( ret < 0 ) {
Debug( LDAP_DEBUG_TRACE,
"syncprov_sendinfo: ber_flatten2 failed\n",
0, 0, 0 );
send_ldap_error( op, rs, LDAP_OTHER, "internal error" );
return ret;
}
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_op->o_req_ndn.bv_len - m2->mt_op->o_req_ndn.bv_len;
if ( rc ) return rc;
return ber_bvcmp( &m1->mt_op->o_req_ndn, &m2->mt_op->o_req_ndn );
}
/* 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 int
syncprov_findbase( Operation *op, fbase_cookie *fc )
{
opcookie *opc = op->o_callback->sc_private;
slap_overinst *on = opc->son;
/* 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_hdr = op->o_hdr;
fop.o_bd = op->o_bd;
fop.o_time = op->o_time;
fop.o_tincr = op->o_tincr;
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.o_bd->bd_info = on->on_info->oi_orig;
rc = fop.o_bd->be_search( &fop, &frs );
fop.o_bd->bd_info = (BackendInfo *)on;
} 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;
#ifdef LDAP_SCOPE_SUBORDINATE
case LDAP_SCOPE_SUBORDINATE:
fc->fscope = dnIsSuffix( fc->fdn, &fc->fss->s_base ) &&
!dn_match( fc->fdn, &fc->fss->s_base );
break;
#endif
}
}
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.
*/
#define FIND_MAXCSN 1
#define FIND_CSN 2
#define FIND_PRESENT 3
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 ) {
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;
if ( 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, int mode )
{
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_LUTIL_CSNSTR_BUFSIZE + STRLENOF("(entryCSN<=)")];
char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
struct berval maxcsn;
Filter cf, af;
#ifdef LDAP_COMP_MATCH
AttributeAssertion eq = { NULL, BER_BVNULL, NULL };
#else
AttributeAssertion eq = { NULL, BER_BVNULL };
#endif
int i, rc = LDAP_SUCCESS;
fpres_cookie pcookie;
sync_control *srs = NULL;
int findcsn_retry = 1;
if ( mode != FIND_MAXCSN ) {
srs = op->o_controls[slap_cids.sc_LDAPsync];
if ( srs->sr_state.ctxcsn.bv_len >= LDAP_LUTIL_CSNSTR_BUFSIZE ) {
return LDAP_OTHER;
}
}
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;
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;
cf.f_av_value = si->si_ctxcsn;
fop.ors_filterstr.bv_len = sprintf( buf, "(entryCSN>=%s)",
cf.f_av_value.bv_val );
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, si->si_ctxcsn.bv_val );
maxcsn.bv_val = cbuf;
maxcsn.bv_len = si->si_ctxcsn.bv_len;
break;
case FIND_CSN:
cf.f_av_value = srs->sr_state.ctxcsn;
/* Look for exact match the first time */
if ( findcsn_retry ) {
cf.f_choice = LDAP_FILTER_EQUALITY;
fop.ors_filterstr.bv_len = sprintf( buf, "(entryCSN=%s)",
cf.f_av_value.bv_val );
/* On retry, look for <= */
} else {
cf.f_choice = LDAP_FILTER_LE;
fop.ors_filterstr.bv_len = sprintf( buf, "(entryCSN<=%s)",
cf.f_av_value.bv_val );
}
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:
af.f_choice = LDAP_FILTER_AND;
af.f_next = NULL;
af.f_and = &cf;
cf.f_choice = LDAP_FILTER_LE;
cf.f_av_value = srs->sr_state.ctxcsn;
cf.f_next = op->ors_filter;
fop.ors_filter = &af;
filter2bv_x( &fop, fop.ors_filter, &fop.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 = on->on_info->oi_orig;
fop.o_bd->be_search( &fop, &frs );
fop.o_bd->bd_info = (BackendInfo *)on;
switch( mode ) {
case FIND_MAXCSN:
strcpy( si->si_ctxcsnbuf, maxcsn.bv_val );
si->si_ctxcsn.bv_len = maxcsn.bv_len;
break;
case FIND_CSN:
/* If matching CSN was not found, invalidate the context. */
if ( !cb.sc_private ) {
/* If we didn't find an exact match, then try for <= */
if ( findcsn_retry ) {
findcsn_retry = 0;
goto again;
}
rc = LDAP_NO_SUCH_OBJECT;
}
break;
case FIND_PRESENT:
op->o_tmpfree( pcookie.uuids, op->o_tmpmemctx );
op->o_tmpfree( fop.ors_filterstr.bv_val, op->o_tmpmemctx );
break;
}
return rc;
}
static void
syncprov_free_syncop( syncops *so )
{
syncres *sr, *srnext;
GroupAssertion *ga, *gnext;
ldap_pvt_thread_mutex_lock( &so->s_mutex );
if ( --so->s_inuse > 0 ) {
ldap_pvt_thread_mutex_unlock( &so->s_mutex );
return;
}
ldap_pvt_thread_mutex_unlock( &so->s_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;
ch_free( sr );
}
ldap_pvt_thread_mutex_destroy( &so->s_mutex );
ch_free( so );
}
/* Send a persistent search response */
static int
syncprov_sendresp( Operation *op, opcookie *opc, syncops *so, Entry **e, int mode)
{
slap_overinst *on = opc->son;
SlapReply rs = { REP_SEARCH };
LDAPControl *ctrls[2];
struct berval cookie;
Entry e_uuid = {0};
Attribute a_uuid = {0};
if ( so->s_op->o_abandon )
return SLAPD_ABANDON;
ctrls[1] = NULL;
slap_compose_sync_cookie( op, &cookie, &opc->sctxcsn, so->s_rid );
e_uuid.e_attrs = &a_uuid;
a_uuid.a_desc = slap_schema.si_ad_entryUUID;
a_uuid.a_nvals = &opc->suuid;
rs.sr_err = syncprov_state_ctrl( op, &rs, &e_uuid,
mode, ctrls, 0, 1, &cookie );
rs.sr_ctrls = ctrls;
op->o_bd->bd_info = (BackendInfo *)on->on_info;
switch( mode ) {
case LDAP_SYNC_ADD:
rs.sr_entry = *e;
if ( rs.sr_entry->e_private )
rs.sr_flags = REP_ENTRY_MUSTRELEASE;
if ( opc->sreference ) {
rs.sr_ref = get_entry_referrals( op, rs.sr_entry );
send_search_reference( op, &rs );
ber_bvarray_free( rs.sr_ref );
if ( !rs.sr_entry )
*e = NULL;
break;
}
/* fallthru */
case LDAP_SYNC_MODIFY:
rs.sr_entry = *e;
if ( rs.sr_entry->e_private )
rs.sr_flags = REP_ENTRY_MUSTRELEASE;
rs.sr_attrs = op->ors_attrs;
send_search_entry( op, &rs );
if ( !rs.sr_entry )
*e = NULL;
break;
case LDAP_SYNC_DELETE:
e_uuid.e_attrs = NULL;
e_uuid.e_name = opc->sdn;
e_uuid.e_nname = opc->sndn;
rs.sr_entry = &e_uuid;
if ( opc->sreference ) {
struct berval bv = BER_BVNULL;
rs.sr_ref = &bv;
send_search_reference( op, &rs );
} else {
send_search_entry( op, &rs );
}
break;
default:
assert(0);
}
/* In case someone else freed it already? */
if ( rs.sr_ctrls ) {
op->o_tmpfree( rs.sr_ctrls[0], op->o_tmpmemctx );
rs.sr_ctrls = NULL;
}
return rs.sr_err;
}
/* Play back queued responses */
static int
syncprov_qplay( Operation *op, slap_overinst *on, syncops *so )
{
syncres *sr;
Entry *e;
opcookie opc;
int rc;
opc.son = on;
op->o_bd->bd_info = (BackendInfo *)on->on_info;
for (;;) {
ldap_pvt_thread_mutex_lock( &so->s_mutex );
sr = so->s_res;
if ( sr )
so->s_res = sr->s_next;
if ( !so->s_res )
so->s_restail = NULL;
ldap_pvt_thread_mutex_unlock( &so->s_mutex );
if ( !sr || so->s_op->o_abandon )
break;
opc.sdn = sr->s_dn;
opc.sndn = sr->s_ndn;
opc.suuid = sr->s_uuid;
opc.sctxcsn = sr->s_csn;
opc.sreference = sr->s_isreference;
e = NULL;
if ( sr->s_mode != LDAP_SYNC_DELETE ) {
rc = be_entry_get_rw( op, &opc.sndn, NULL, NULL, 0, &e );
if ( rc ) {
ch_free( sr );
continue;
}
}
rc = syncprov_sendresp( op, &opc, so, &e, sr->s_mode );
if ( e ) {
be_entry_release_rw( op, e, 0 );
}
ch_free( sr );
if ( rc )
break;
}
op->o_bd->bd_info = (BackendInfo *)on;
return rc;
}
/* runqueue task for playing back queued responses */
static void *
syncprov_qtask( void *ctx, void *arg )
{
struct re_s *rtask = arg;
syncops *so = rtask->arg;
slap_overinst *on = so->s_op->o_private;
char opbuf[OPERATION_BUFFER_SIZE];
Operation *op;
BackendDB be;
op = (Operation *)opbuf;
*op = *so->s_op;
op->o_hdr = (Opheader *)(op+1);
op->o_controls = (void **)(op->o_hdr+1);
memset( op->o_controls, 0, SLAP_MAX_CIDS * sizeof(void *));
*op->o_hdr = *so->s_op->o_hdr;
op->o_tmpmemctx = slap_sl_mem_create(SLAP_SLAB_SIZE, SLAP_SLAB_STACK, ctx);
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;
op->o_private = NULL;
op->o_callback = NULL;
syncprov_qplay( op, on, so );
/* decrement use count... */
syncprov_free_syncop( so );
/* wait until we get explicitly scheduled again */
ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
ldap_pvt_runqueue_stoptask( &slapd_rq, so->s_qtask );
ldap_pvt_runqueue_resched( &slapd_rq, so->s_qtask, 1 );
ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
return NULL;
}
/* Queue a persistent search response */
static int
syncprov_qresp( opcookie *opc, syncops *so, int mode )
{
syncres *sr;
sr = ch_malloc(sizeof(syncres) + opc->suuid.bv_len + 1 +
opc->sdn.bv_len + 1 + opc->sndn.bv_len + 1 + opc->sctxcsn.bv_len + 1 );
sr->s_next = NULL;
sr->s_dn.bv_val = (char *)(sr + 1);
sr->s_dn.bv_len = opc->sdn.bv_len;
sr->s_mode = mode;
sr->s_isreference = opc->sreference;
sr->s_ndn.bv_val = lutil_strcopy( sr->s_dn.bv_val, opc->sdn.bv_val );
sr->s_ndn.bv_len = opc->sndn.bv_len;
*(sr->s_ndn.bv_val++) = '\0';
sr->s_uuid.bv_val = lutil_strcopy( sr->s_ndn.bv_val, opc->sndn.bv_val );
sr->s_uuid.bv_len = opc->suuid.bv_len;
*(sr->s_uuid.bv_val++) = '\0';
sr->s_csn.bv_val = lutil_strcopy( sr->s_uuid.bv_val, opc->suuid.bv_val );
sr->s_csn.bv_len = opc->sctxcsn.bv_len;
strcpy( sr->s_csn.bv_val, opc->sctxcsn.bv_val );
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 ) {
ldap_pvt_thread_mutex_lock( &slapd_rq.rq_mutex );
if ( !so->s_qtask ) {
so->s_qtask = ldap_pvt_runqueue_insert( &slapd_rq, RUNQ_INTERVAL,
syncprov_qtask, so, "syncprov_qtask",
so->s_op->o_conn->c_peer_name.bv_val );
++so->s_inuse;
} else {
if (!ldap_pvt_runqueue_isrunning( &slapd_rq, so->s_qtask ) &&
!so->s_qtask->next_sched.tv_sec ) {
so->s_qtask->interval.tv_sec = 0;
ldap_pvt_runqueue_resched( &slapd_rq, so->s_qtask, 0 );
so->s_qtask->interval.tv_sec = RUNQ_INTERVAL;
++so->s_inuse;
}
}
ldap_pvt_thread_mutex_unlock( &slapd_rq.rq_mutex );
}
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, slap_op,
o_next );
if ( lock )
ldap_pvt_thread_mutex_unlock( &so->s_op->o_conn->c_mutex );
}
syncprov_free_syncop( so );
return 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( op->o_callback->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, *soprev;
ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
for ( so=si->si_ops, soprev = (syncops *)&si->si_ops; so;
soprev=so, so=so->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;
soprev->s_next = 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;
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 *ss, *sprev, *snext;
Entry *e;
Attribute *a;
int rc;
struct berval newdn;
int freefdn = 0;
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 ) {
op->o_bd->bd_info = (BackendInfo *)on->on_info;
rc = be_entry_get_rw( op, fc.fdn, NULL, NULL, 0, &e );
/* If we're sending responses now, make a copy and unlock the DB */
if ( e && !saveit ) {
Entry *e2 = entry_dup( e );
be_entry_release_rw( op, e, 0 );
e = e2;
}
op->o_bd->bd_info = (BackendInfo *)on;
if ( rc ) return;
} else {
e = op->ora_e;
}
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 );
} 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 (ss = si->si_ops, sprev = (syncops *)&si->si_ops; ss;
sprev = ss, ss=snext)
{
syncmatches *sm;
int found = 0;
snext = ss->s_next;
/* 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" );
sprev->s_next = snext;
syncprov_drop_psearch( ss, 1 );
ss = sprev;
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;
}
}
}
/* check if current o_req_dn is in scope and matches filter */
if ( fc.fscope && test_filter( op, e, ss->s_op->ors_filter ) ==
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 );
}
}
ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
if ( op->o_tag != LDAP_REQ_ADD && e ) {
op->o_bd->bd_info = (BackendInfo *)on->on_info;
be_entry_release_rw( op, e, 0 );
op->o_bd->bd_info = (BackendInfo *)on;
}
if ( freefdn ) {
op->o_tmpfree( fc.fdn->bv_val, op->o_tmpmemctx );
}
}
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, mtdummy;
for (sm = opc->smatches; sm; sm=snext) {
snext = sm->sm_next;
syncprov_free_syncop( sm->sm_op );
op->o_tmpfree( sm, op->o_tmpmemctx );
}
/* Remove op from lock table */
mtdummy.mt_op = op;
ldap_pvt_thread_mutex_lock( &si->si_mods_mutex );
mt = avl_find( si->si_mods, &mtdummy, sp_avl_cmp );
if ( mt ) {
modinst *mi = mt->mt_mods;
/* If there are more, promote the next one */
ldap_pvt_thread_mutex_lock( &mt->mt_mutex );
if ( mi->mi_next ) {
mt->mt_mods = mi->mi_next;
mt->mt_op = mt->mt_mods->mi_op;
ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
} else {
avl_delete( &si->si_mods, mt, sp_avl_cmp );
ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
ldap_pvt_thread_mutex_destroy( &mt->mt_mutex );
ch_free( mt );
}
}
ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
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, SlapReply *rs, slap_overinst *on )
{
syncprov_info_t *si = on->on_bi.bi_private;
Modifications mod;
Operation opm;
struct berval bv[2];
slap_callback cb = {0};
int manage = get_manageDSAit(op);
mod.sml_values = bv;
bv[1].bv_val = NULL;
bv[0] = si->si_ctxcsn;
mod.sml_nvalues = NULL;
mod.sml_desc = slap_schema.si_ad_contextCSN;
mod.sml_op = LDAP_MOD_REPLACE;
mod.sml_flags = 0;
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.o_req_dn = op->o_bd->be_suffix[0];
opm.o_req_ndn = op->o_bd->be_nsuffix[0];
opm.o_bd->bd_info = on->on_info->oi_orig;
opm.o_managedsait = SLAP_CONTROL_NONCRITICAL;
opm.o_bd->be_modify( &opm, rs );
opm.o_managedsait = manage;
}
static void
syncprov_add_slog( Operation *op, struct berval *csn )
{
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;
sl = si->si_logs;
{
/* Allocate a record. UUIDs are not NUL-terminated. */
se = ch_malloc( sizeof( slog_entry ) + opc->suuid.bv_len +
csn->bv_len + 1 );
se->se_next = NULL;
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, csn->bv_val, csn->bv_len );
se->se_csn.bv_val[csn->bv_len] = '\0';
se->se_csn.bv_len = csn->bv_len;
ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
if ( sl->sl_head ) {
sl->sl_tail->se_next = se;
} else {
sl->sl_head = se;
}
sl->sl_tail = se;
sl->sl_num++;
while ( sl->sl_num > sl->sl_size ) {
se = sl->sl_head;
sl->sl_head = se->se_next;
strcpy( sl->sl_mincsn.bv_val, se->se_csn.bv_val );
sl->sl_mincsn.bv_len = se->se_csn.bv_len;
ch_free( se );
sl->sl_num--;
if ( !sl->sl_head ) {
sl->sl_tail = NULL;
}
}
ldap_pvt_thread_mutex_unlock( &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,
struct berval *oldcsn, struct berval *ctxcsn )
{
slap_overinst *on = (slap_overinst *)op->o_bd->bd_info;
slog_entry *se;
int i, j, ndel, num, nmods, mmods;
BerVarray uuids;
if ( !sl->sl_num ) {
ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
return;
}
num = sl->sl_num;
i = 0;
nmods = 0;
uuids = op->o_tmpalloc( (num+1) * sizeof( struct berval ) +
num * UUID_LEN, op->o_tmpmemctx );
uuids[0].bv_val = (char *)(uuids + num + 1);
/* Make a copy of the relevant UUIDs. Put the Deletes up front
* and everything else at the end. Do this first so we can
* unlock the list mutex.
*/
for ( se=sl->sl_head; se; se=se->se_next ) {
if ( ber_bvcmp( &se->se_csn, oldcsn ) < 0 ) continue;
if ( ber_bvcmp( &se->se_csn, ctxcsn ) > 0 ) break;
if ( se->se_tag == LDAP_REQ_DELETE ) {
j = i;
i++;
} else {
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;
}
ldap_pvt_thread_mutex_unlock( &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;
SlapReply frs = { REP_RESULT };
int rc;
Filter mf, af;
#ifdef LDAP_COMP_MATCH
AttributeAssertion eq = { NULL, BER_BVNULL, NULL };
#else
AttributeAssertion eq;
#endif
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 = &af;
cb.sc_response = playlog_cb;
fop.o_bd->bd_info = on->on_info->oi_orig;
for ( i=ndel; i<num; i++ ) {
if ( uuids[i].bv_len == 0 ) continue;
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 ) {
uuids[ndel].bv_val = NULL;
syncprov_sendinfo( op, rs, LDAP_TAG_SYNC_ID_SET, NULL, 0, uuids, 1 );
}
}
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 = BER_BVNULL, curcsn = BER_BVNULL;
char cbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
/* Update our context CSN */
cbuf[0] = '\0';
ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
slap_get_commit_csn( op, &maxcsn, &curcsn );
if ( !BER_BVISNULL( &maxcsn ) ) {
strcpy( cbuf, maxcsn.bv_val );
if ( ber_bvcmp( &maxcsn, &si->si_ctxcsn ) > 0 ) {
strcpy( si->si_ctxcsnbuf, cbuf );
si->si_ctxcsn.bv_len = maxcsn.bv_len;
}
}
/* Don't do any processing for consumer contextCSN updates */
if ( SLAP_SYNC_SHADOW( op->o_bd ) &&
op->o_msgid == SLAP_SYNC_UPDATE_MSGID ) {
ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
return SLAP_CB_CONTINUE;
}
si->si_numops++;
if ( si->si_chkops || si->si_chktime ) {
int do_check=0;
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 )) {
do_check = 1;
si->si_chklast = op->o_time;
}
if ( do_check ) {
syncprov_checkpoint( op, rs, on );
}
}
ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
opc->sctxcsn.bv_len = maxcsn.bv_len;
opc->sctxcsn.bv_val = cbuf;
/* Handle any persistent searches */
if ( si->si_ops ) {
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 );
}
break;
}
}
/* Add any log records */
if ( si->si_logs && op->o_tag != LDAP_REQ_ADD ) {
syncprov_add_slog( op, &curcsn );
}
}
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, op->o_bd->be_nsuffix ) &&
op->oq_compare.rs_ava->aa_desc == slap_schema.si_ad_contextCSN )
{
Entry e = {0};
Attribute a = {0};
struct berval bv[2];
e.e_name = op->o_bd->be_suffix[0];
e.e_nname = op->o_bd->be_nsuffix[0];
BER_BVZERO( &bv[1] );
bv[0] = si->si_ctxcsn;
a.a_desc = slap_schema.si_ad_contextCSN;
a.a_vals = bv;
a.a_nvals = a.a_vals;
ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
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 ( value_find_ex( op->oq_compare.rs_ava->aa_desc,
SLAP_MR_ATTRIBUTE_VALUE_NORMALIZED_MATCH |
SLAP_MR_ASSERTED_VALUE_NORMALIZED_MATCH,
a.a_nvals, &op->oq_compare.rs_ava->aa_value, op->o_tmpmemctx ) == 0 )
{
rs->sr_err = LDAP_COMPARE_TRUE;
}
return_results:;
ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
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 = op->o_tmpcalloc(1, sizeof(slap_callback)+
sizeof(opcookie) +
(si->si_ops ? sizeof(modinst) : 0 ),
op->o_tmpmemctx);
opcookie *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;
/* If there are active persistent searches, lock this operation.
* See seqmod.c for the locking logic on its own.
*/
if ( si->si_ops ) {
modtarget *mt, mtdummy;
modinst *mi;
mi = (modinst *)(opc+1);
mi->mi_op = op;
/* See if we're already modifying this entry... */
mtdummy.mt_op = op;
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 );
ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
mt->mt_tail->mi_next = mi;
mt->mt_tail = mi;
/* wait for this op to get to head of list */
while ( mt->mt_mods != mi ) {
ldap_pvt_thread_mutex_unlock( &mt->mt_mutex );
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;
for ( m2 = mt->mt_mods; m2->mi_next != mi;
m2 = m2->mi_next );
m2->mi_next = mi->mi_next;
if ( mt->mt_tail == mi ) mt->mt_tail = m2;
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;
mt->mt_op = mi->mi_op;
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 );
}
}
if (( si->si_ops || 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;
int ss_present;
struct berval ss_ctxcsn;
char ss_csnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
} searchstate;
static int
syncprov_search_cleanup( Operation *op, SlapReply *rs )
{
if ( rs->sr_ctrls ) {
op->o_tmpfree( rs->sr_ctrls[0], op->o_tmpmemctx );
op->o_tmpfree( rs->sr_ctrls, op->o_tmpmemctx );
rs->sr_ctrls = NULL;
}
return 0;
}
static void
syncprov_detach_op( Operation *op, syncops *so, slap_overinst *on )
{
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 = sizeof(Operation) + sizeof(Opheader) +
(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;
op2 = (Operation *)ch_calloc( 1, size );
op2->o_hdr = (Opheader *)(op2+1);
/* 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_private = on;
if ( i ) {
op2->ors_attrs = (AttributeName *)(op2->o_hdr + 1);
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 );
} else {
ptr = (char *)(op2->o_hdr + 1);
}
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;
op2->ors_filter = str2filter( ptr );
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 */
ldap_pvt_thread_mutex_lock( &op->o_conn->c_mutex );
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;
ldap_pvt_thread_mutex_unlock( &op->o_conn->c_mutex );
}
static int
syncprov_search_response( Operation *op, SlapReply *rs )
{
searchstate *ss = op->o_callback->sc_private;
slap_overinst *on = ss->ss_on;
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, "bogus referral in context\n",0,0,0 );
return SLAP_CB_CONTINUE;
}
a = attr_find( rs->sr_entry->e_attrs, slap_schema.si_ad_entryCSN );
if ( a ) {
/* Make sure entry is less than the snaphot'd contextCSN */
if ( ber_bvcmp( &a->a_nvals[0], &ss->ss_ctxcsn ) > 0 )
return LDAP_SUCCESS;
/* Don't send the ctx entry twice */
if ( !BER_BVISNULL( &srs->sr_state.ctxcsn ) &&
bvmatch( &a->a_nvals[0], &srs->sr_state.ctxcsn ) )
return LDAP_SUCCESS;
}
rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
op->o_tmpmemctx );
rs->sr_ctrls[1] = NULL;
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;
slap_compose_sync_cookie( op, &cookie, &ss->ss_ctxcsn,
srs->sr_state.rid );
/* Is this a regular refresh? */
if ( !ss->ss_so ) {
rs->sr_ctrls = op->o_tmpalloc( sizeof(LDAPControl *)*2,
op->o_tmpmemctx );
rs->sr_ctrls[1] = NULL;
rs->sr_err = syncprov_done_ctrl( op, rs, rs->sr_ctrls,
0, 1, &cookie, ss->ss_present ? LDAP_SYNC_REFRESH_PRESENTS :
LDAP_SYNC_REFRESH_DELETES );
} else {
/* It's RefreshAndPersist, transition to Persist phase */
syncprov_sendinfo( op, rs, ( ss->ss_present && rs->sr_nentries ) ?
LDAP_TAG_SYNC_REFRESH_PRESENT : LDAP_TAG_SYNC_REFRESH_DELETE,
&cookie, 1, NULL, 0 );
/* Detach this Op from frontend control */
ldap_pvt_thread_mutex_lock( &ss->ss_so->s_mutex );
/* Turn off the refreshing flag */
ss->ss_so->s_flags ^= PS_IS_REFRESHING;
syncprov_detach_op( op, ss->ss_so, on );
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, nochange = 0, do_present;
syncops *sop = NULL;
searchstate *ss;
sync_control *srs;
struct berval ctxcsn;
char csnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
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;
}
do_present = si->si_nopres ? 0 : 1;
srs = op->o_controls[slap_cids.sc_LDAPsync];
op->o_managedsait = SLAP_CONTROL_NONCRITICAL;
/* 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;
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;
cb = op->o_callback;
op->o_callback = &sc;
rs->sr_err = syncprov_findbase( op, &fc );
op->o_callback = cb;
if ( rs->sr_err != LDAP_SUCCESS ) {
send_ldap_result( op, rs );
return rs->sr_err;
}
sop = ch_malloc( sizeof( syncops ));
*sop = so;
ldap_pvt_thread_mutex_init( &sop->s_mutex );
sop->s_rid = srs->sr_state.rid;
sop->s_inuse = 1;
ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
sop->s_next = si->si_ops;
si->si_ops = sop;
ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
}
/* snapshot the ctxcsn */
ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
strcpy( csnbuf, si->si_ctxcsnbuf );
ctxcsn.bv_len = si->si_ctxcsn.bv_len;
ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
ctxcsn.bv_val = csnbuf;
/* If we have a cookie, handle the PRESENT lookups */
if ( !BER_BVISNULL( &srs->sr_state.ctxcsn )) {
sessionlog *sl;
/* The cookie was validated when it was parsed, just use it */
/* If just Refreshing and nothing has changed, shortcut it */
if ( bvmatch( &srs->sr_state.ctxcsn, &ctxcsn )) {
nochange = 1;
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;
}
goto shortcut;
}
/* Do we have a sessionlog for this search? */
sl=si->si_logs;
if ( sl ) {
ldap_pvt_thread_mutex_lock( &sl->sl_mutex );
if ( ber_bvcmp( &srs->sr_state.ctxcsn, &sl->sl_mincsn ) >= 0 ) {
do_present = 0;
/* mutex is unlocked in playlog */
syncprov_playlog( op, rs, sl, &srs->sr_state.ctxcsn, &ctxcsn );
} else {
ldap_pvt_thread_mutex_unlock( &sl->sl_mutex );
}
}
/* Is the CSN still present in the database? */
if ( syncprov_findcsn( op, FIND_CSN ) != LDAP_SUCCESS ) {
/* No, so a reload is required */
#if 0 /* the consumer doesn't seem to send this hint */
if ( op->o_sync_rhint == 0 ) {
send_ldap_error( op, rs, LDAP_SYNC_REFRESH_REQUIRED, "sync cookie is stale" );
return rs->sr_err;
}
#endif
} else {
gotstate = 1;
/* If changed and doing Present lookup, send Present UUIDs */
if ( do_present && syncprov_findcsn( op, FIND_PRESENT ) !=
LDAP_SUCCESS ) {
send_ldap_result( op, rs );
return rs->sr_err;
}
}
}
shortcut:
/* Append CSN range to search filter, save original filter
* for persistent search evaluation
*/
if ( sop ) {
sop->s_filterstr= op->ors_filterstr;
}
/* If something changed, find the changes */
if ( gotstate && !nochange ) {
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, &srs->sr_state.ctxcsn, op->o_tmpmemctx );
fava->f_next = op->ors_filter;
op->ors_filter = fand;
filter2bv_x( op, op->ors_filter, &op->ors_filterstr );
}
/* 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_present = do_present;
ss->ss_ctxcsn.bv_len = ctxcsn.bv_len;
ss->ss_ctxcsn.bv_val = ss->ss_csnbuf;
strcpy( ss->ss_ctxcsn.bv_val, ctxcsn.bv_val );
cb->sc_response = syncprov_search_response;
cb->sc_cleanup = syncprov_search_cleanup;
cb->sc_private = ss;
cb->sc_next = op->o_callback;
op->o_callback = cb;
#if 0 /* I don't think we need to shortcircuit back-bdb any more */
op->o_sync_mode &= SLAP_CONTROL_MASK;
#endif
/* 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 ( nochange ) {
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;
if ( rs->sr_entry &&
dn_match( &rs->sr_entry->e_nname, op->o_bd->be_nsuffix )) {
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;
}
if ( !a ) {
for ( ap = &rs->sr_operational_attrs; *ap; ap=&(*ap)->a_next );
a = ch_malloc( sizeof(Attribute));
a->a_desc = slap_schema.si_ad_contextCSN;
a->a_vals = ch_malloc( 2 * sizeof(struct berval));
a->a_vals[1].bv_val = NULL;
a->a_nvals = a->a_vals;
a->a_next = NULL;
a->a_flags = 0;
*ap = a;
}
ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
if ( !ap ) {
strcpy( a->a_vals[0].bv_val, si->si_ctxcsnbuf );
} else {
ber_dupbv( &a->a_vals[0], &si->si_ctxcsn );
}
ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
}
}
return SLAP_CB_CONTINUE;
}
enum {
SP_CHKPT = 1,
SP_SESSL,
SP_NOPRES
};
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 },
{ 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 ) )",
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;
bv.bv_len = sprintf( c->msg, "%d %d",
si->si_chkops, si->si_chktime );
bv.bv_val = c->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;
}
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:
if ( si->si_logs )
si->si_logs->sl_size = 0;
else
rc = LDAP_NO_SUCH_ATTRIBUTE;
break;
case SP_NOPRES:
if ( si->si_nopres )
si->si_nopres = 0;
else
rc = LDAP_NO_SUCH_ATTRIBUTE;
break;
}
return rc;
}
switch ( c->type ) {
case SP_CHKPT:
si->si_chkops = atoi( c->argv[1] );
si->si_chktime = atoi( c->argv[2] ) * 60;
break;
case SP_SESSL: {
sessionlog *sl;
int size = c->value_int;
if ( size < 0 ) {
sprintf( c->msg, "%s size %d is negative",
c->argv[0], size );
Debug( LDAP_DEBUG_CONFIG, "%s: %s\n", c->log, c->msg, 0 );
return ARG_BAD_CONF;
}
sl = si->si_logs;
if ( !sl ) {
sl = ch_malloc( sizeof( sessionlog ) + LDAP_LUTIL_CSNSTR_BUFSIZE );
sl->sl_mincsn.bv_val = (char *)(sl+1);
sl->sl_mincsn.bv_len = 0;
sl->sl_num = 0;
sl->sl_head = sl->sl_tail = NULL;
ldap_pvt_thread_mutex_init( &sl->sl_mutex );
si->si_logs = sl;
}
sl->sl_size = size;
}
break;
case SP_NOPRES:
si->si_nopres = 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 );
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
)
{
slap_overinst *on = (slap_overinst *) be->bd_info;
syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
Connection conn;
char opbuf[OPERATION_BUFFER_SIZE];
char ctxcsnbuf[LDAP_LUTIL_CSNSTR_BUFSIZE];
Operation *op = (Operation *)opbuf;
Entry *e;
Attribute *a;
int rc;
void *thrctx = NULL;
if ( slapMode & SLAP_TOOL_MODE ) {
return 0;
}
rc = overlay_register_control( be, LDAP_CONTROL_SYNC );
if ( rc ) {
return rc;
}
thrctx = ldap_pvt_thread_pool_context();
connection_fake_init( &conn, op, thrctx );
op->o_bd = be;
op->o_dn = be->be_rootdn;
op->o_ndn = be->be_rootndn;
ctxcsnbuf[0] = '\0';
op->o_bd->bd_info = on->on_info->oi_orig;
rc = be_entry_get_rw( op, be->be_nsuffix, NULL,
slap_schema.si_ad_contextCSN, 0, &e );
if ( e ) {
ldap_pvt_thread_t tid;
a = attr_find( e->e_attrs, slap_schema.si_ad_contextCSN );
if ( a ) {
si->si_ctxcsn.bv_len = a->a_nvals[0].bv_len;
if ( si->si_ctxcsn.bv_len >= sizeof(si->si_ctxcsnbuf ))
si->si_ctxcsn.bv_len = sizeof(si->si_ctxcsnbuf)-1;
strncpy( si->si_ctxcsnbuf, a->a_nvals[0].bv_val,
si->si_ctxcsn.bv_len );
si->si_ctxcsnbuf[si->si_ctxcsn.bv_len] = '\0';
strcpy( ctxcsnbuf, si->si_ctxcsnbuf );
}
be_entry_release_rw( op, e, 0 );
op->o_bd->bd_info = (BackendInfo *)on;
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 );
} else if ( SLAP_SYNC_SHADOW( op->o_bd )) {
/* If we're also a consumer, and we didn't find the context entry,
* then don't generate anything, wait for our provider to send it
* to us.
*/
goto out;
}
if ( BER_BVISEMPTY( &si->si_ctxcsn ) ) {
slap_get_csn( op, si->si_ctxcsnbuf, sizeof(si->si_ctxcsnbuf),
&si->si_ctxcsn, 0 );
}
/* If our ctxcsn is different from what was read from the root
* entry, make sure we do a checkpoint on close
*/
if ( strcmp( si->si_ctxcsnbuf, ctxcsnbuf )) {
si->si_numops++;
}
out:
op->o_bd->bd_info = (BackendInfo *)on;
ldap_pvt_thread_pool_context_reset( thrctx );
return 0;
}
/* Write the current contextCSN into the underlying db.
*/
static int
syncprov_db_close(
BackendDB *be
)
{
slap_overinst *on = (slap_overinst *) be->bd_info;
syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
if ( slapMode & SLAP_TOOL_MODE ) {
return 0;
}
if ( si->si_numops ) {
Connection conn;
char opbuf[OPERATION_BUFFER_SIZE];
Operation *op = (Operation *)opbuf;
SlapReply rs = {REP_RESULT};
void *thrctx;
thrctx = ldap_pvt_thread_pool_context();
connection_fake_init( &conn, op, thrctx );
op->o_bd = be;
op->o_dn = be->be_rootdn;
op->o_ndn = be->be_rootndn;
syncprov_checkpoint( op, &rs, on );
ldap_pvt_thread_pool_context_reset( thrctx );
}
return 0;
}
static int
syncprov_db_init(
BackendDB *be
)
{
slap_overinst *on = (slap_overinst *)be->bd_info;
syncprov_info_t *si;
si = ch_calloc(1, sizeof(syncprov_info_t));
on->on_bi.bi_private = si;
ldap_pvt_thread_mutex_init( &si->si_csn_mutex );
ldap_pvt_thread_mutex_init( &si->si_ops_mutex );
ldap_pvt_thread_mutex_init( &si->si_mods_mutex );
si->si_ctxcsn.bv_val = si->si_ctxcsnbuf;
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
)
{
slap_overinst *on = (slap_overinst *)be->bd_info;
syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
if ( si ) {
ldap_pvt_thread_mutex_destroy( &si->si_mods_mutex );
ldap_pvt_thread_mutex_destroy( &si->si_ops_mutex );
ldap_pvt_thread_mutex_destroy( &si->si_csn_mutex );
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_BVISEMPTY( &ctrl->ldctl_value ) ) {
rs->sr_text = "Sync control value is empty (or absent)";
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;
}
}
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 );
slap_parse_sync_cookie( &sr->sr_state, op->o_tmpmemctx );
if ( sr->sr_state.rid == -1 ) {
rs->sr_text = "Sync control : cookie parsing error";
return LDAP_PROTOCOL_ERROR;
}
}
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_init()
{
int rc;
rc = register_supported_control( LDAP_CONTROL_SYNC,
SLAP_CTRL_HIDE|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;
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_init();
}
#endif /* SLAPD_OVER_SYNCPROV == SLAPD_MOD_DYNAMIC */
#endif /* defined(SLAPD_OVER_SYNCPROV) */
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