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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 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"
/* 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 */
long s_sid;
long s_rid;
struct berval s_filterstr;
int s_flags; /* search status */
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)
#define PS_IS_REFRESHING 0x01
/* Record of which searches matched at premodify step */
typedef struct syncmatches {
struct syncmatches *sm_next;
syncops *sm_op;
} syncmatches;
/* 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 */
time_t si_chklast; /* time of last checkpoint */
Avlnode *si_mods; /* entries being modified */
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[2];
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;
int res;
const char *text = NULL;
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;
}
}
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;
}
#if 0
/* Generate state based on session log - not implemented yet */
static int
syncprov_state_ctrl_from_slog(
Operation *op,
SlapReply *rs,
struct slog_entry *slog_e,
int entry_sync_state,
LDAPControl **ctrls,
int num_ctrls,
int send_cookie,
struct berval *cookie)
{
Attribute* a;
int ret;
int res;
const char *text = NULL;
BerElementBuffer berbuf;
BerElement *ber = (BerElement *)&berbuf;
struct berval entryuuid_bv = BER_BVNULL;
ber_init2( ber, NULL, LBER_USE_DER );
ber_set_option( ber, LBER_OPT_BER_MEMCTX, &op->o_tmpmemctx );
ctrls[num_ctrls] = ch_malloc ( sizeof ( LDAPControl ) );
entryuuid_bv = slog_e->sl_uuid;
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;
}
#endif
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 = 1;
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. Now
* see if the fdn resides in the scope.
*/
fc->fbase = 1;
switch ( fc->fss->s_op->ors_scope ) {
case LDAP_SCOPE_BASE:
fc->fscope = dn_match( fc->fdn, &rs->sr_entry->e_nname );
break;
case LDAP_SCOPE_ONELEVEL: {
struct berval pdn;
dnParent( fc->fdn, &pdn );
fc->fscope = dn_match( &pdn, &rs->sr_entry->e_nname );
break; }
case LDAP_SCOPE_SUBTREE:
fc->fscope = dnIsSuffix( fc->fdn, &rs->sr_entry->e_nname );
break;
#ifdef LDAP_SCOPE_SUBORDINATE
case LDAP_SCOPE_SUBORDINATE:
fc->fscope = dnIsSuffix( fc->fdn, &rs->sr_entry->e_nname ) &&
!dn_match( fc->fdn, &rs->sr_entry->e_nname );
break;
#endif
}
}
}
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;
syncprov_info_t *si = on->on_bi.bi_private;
slap_callback cb = {0};
Operation fop;
SlapReply frs = { REP_RESULT };
int rc;
fop = *op;
cb.sc_response = findbase_cb;
cb.sc_private = fc;
fop.o_sync_mode &= SLAP_CONTROL_MASK; /* turn off sync mode */
fop.o_callback = &cb;
fop.o_tag = LDAP_REQ_SEARCH;
fop.ors_scope = LDAP_SCOPE_BASE;
fop.ors_deref = fc->fss->s_op->ors_deref;
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 = fc->fss->s_op->ors_filter;
fop.ors_filterstr = fc->fss->s_op->ors_filterstr;
fop.o_req_ndn = fc->fss->s_op->o_req_ndn;
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;
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. (Used to search for =.) 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 )) {
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;
int ret = SLAP_CB_CONTINUE;
if ( rs->sr_type == REP_SEARCH ) {
Attribute *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 ) {
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;
}
} else if ( rs->sr_type == 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;
}
}
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 fbuf, maxcsn;
Filter cf;
AttributeAssertion eq;
int i, rc = LDAP_SUCCESS;
fpres_cookie pcookie;
sync_control *srs;
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 */
fbuf.bv_val = buf;
cf.f_ava = &eq;
cf.f_av_desc = slap_schema.si_ad_entryCSN;
cf.f_next = NULL;
switch( mode ) {
case FIND_MAXCSN:
cf.f_choice = LDAP_FILTER_GE;
cf.f_av_value = si->si_ctxcsn;
fbuf.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;
maxcsn.bv_val = cbuf;
maxcsn.bv_len = 0;
break;
case FIND_CSN:
cf.f_choice = LDAP_FILTER_LE;
cf.f_av_value = *srs->sr_state.ctxcsn;
fbuf.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:
cf.f_choice = LDAP_FILTER_LE;
cf.f_av_value = *srs->sr_state.ctxcsn;
fbuf.bv_len = sprintf( buf, "(entryCSN<=%s)",
cf.f_av_value.bv_val );
fop.ors_attrsonly = 0;
fop.ors_attrs = uuid_anlist;
fop.ors_slimit = SLAP_NO_LIMIT;
/* We want pure entries, not referrals */
fop.o_managedsait = SLAP_CONTROL_CRITICAL;
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_callback = &cb;
fop.ors_limit = NULL;
fop.ors_tlimit = SLAP_NO_LIMIT;
fop.ors_filter = &cf;
fop.ors_filterstr = fbuf;
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:
if ( maxcsn.bv_len ) {
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 ) rc = LDAP_NO_SUCH_OBJECT;
break;
case FIND_PRESENT:
op->o_tmpfree( pcookie.uuids, op->o_tmpmemctx );
break;
}
return rc;
}
/* Queue a persistent search response if still in Refresh stage */
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_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_val++) = '\0';
sr->s_uuid.bv_val = lutil_strcopy( sr->s_ndn.bv_val, opc->sndn.bv_val );
*(sr->s_uuid.bv_val++) = '\0';
sr->s_csn.bv_val = lutil_strcopy( sr->s_uuid.bv_val, opc->suuid.bv_val );
if ( !so->s_res ) {
so->s_res = sr;
} else {
so->s_restail->s_next = sr;
}
so->s_restail = sr;
ldap_pvt_thread_mutex_unlock( &so->s_mutex );
return LDAP_SUCCESS;
}
/* Send a persistent search response */
static int
syncprov_sendresp( Operation *op, opcookie *opc, syncops *so, Entry *e, int mode, int queue )
{
slap_overinst *on = opc->son;
syncprov_info_t *si = on->on_bi.bi_private;
SlapReply rs = { REP_SEARCH };
LDAPControl *ctrls[2];
struct berval cookie;
Entry e_uuid = {0};
Attribute a_uuid = {0};
Operation sop = *so->s_op;
Opheader ohdr;
ohdr = *sop.o_hdr;
sop.o_hdr = &ohdr;
sop.o_tmpmemctx = op->o_tmpmemctx;
sop.o_bd = op->o_bd;
sop.o_controls = op->o_controls;
if ( queue && (so->s_flags & PS_IS_REFRESHING) ) {
ldap_pvt_thread_mutex_lock( &so->s_mutex );
if ( so->s_flags & PS_IS_REFRESHING )
return syncprov_qresp( opc, so, mode );
ldap_pvt_thread_mutex_unlock( &so->s_mutex );
}
ctrls[1] = NULL;
slap_compose_sync_cookie( op, &cookie, &opc->sctxcsn,
so->s_sid, 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( &sop, &rs, &e_uuid,
mode, ctrls, 0, 1, &cookie );
rs.sr_entry = e;
rs.sr_ctrls = ctrls;
switch( mode ) {
case LDAP_SYNC_ADD:
if ( opc->sreference ) {
rs.sr_ref = get_entry_referrals( &sop, e );
send_search_reference( &sop, &rs );
ber_bvarray_free( rs.sr_ref );
break;
}
/* fallthru */
case LDAP_SYNC_MODIFY:
rs.sr_attrs = sop.ors_attrs;
send_search_entry( &sop, &rs );
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( &sop, &rs );
} else {
send_search_entry( &sop, &rs );
}
break;
default:
assert(0);
}
op->o_tmpfree( rs.sr_ctrls[0], op->o_tmpmemctx );
rs.sr_ctrls = NULL;
return rs.sr_err;
}
static void
syncprov_free_syncop( syncops *so )
{
syncres *sr, *srnext;
ldap_pvt_thread_mutex_lock( &so->s_mutex );
so->s_inuse--;
if ( so->s_inuse > 0 ) {
ldap_pvt_thread_mutex_unlock( &so->s_mutex );
return;
}
ldap_pvt_thread_mutex_unlock( &so->s_mutex );
filter_free( so->s_op->ors_filter );
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 );
}
static int
syncprov_drop_psearch( syncops *so )
{
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_pvt_thread_mutex_unlock( &so->s_op->o_conn->c_mutex );
syncprov_free_syncop( so );
}
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 ) {
rs->sr_err = LDAP_CANCELLED;
send_ldap_result( so->s_op, rs );
}
syncprov_drop_psearch( so );
}
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 );
op->o_bd->bd_info = (BackendInfo *)on;
if ( rc ) return;
} else {
e = op->ora_e;
}
/* Never replicate these */
if ( is_entry_syncConsumerSubentry( e )) {
goto done;
}
if ( saveit ) {
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 );
}
if ( saveit || op->o_tag == LDAP_REQ_ADD ) {
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 );
}
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 );
continue;
}
/* If we're sending results now, look for this op in old matches */
if ( !saveit ) {
syncmatches *old;
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;
ss->s_inuse++;
opc->smatches = sm;
} else {
/* if found send UPDATE else send ADD */
syncprov_sendresp( op, opc, ss, e,
found ? LDAP_SYNC_MODIFY : LDAP_SYNC_ADD, 1 );
}
} else if ( !saveit && found ) {
/* send DELETE */
syncprov_sendresp( op, opc, ss, NULL, LDAP_SYNC_DELETE, 1 );
}
}
ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
done:
if ( op->o_tag != LDAP_REQ_ADD ) {
op->o_bd->bd_info = (BackendInfo *)on->on_info;
be_entry_release_r( op, e );
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 );
ldap_pvt_thread_mutex_unlock( &si->si_mods_mutex );
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 {
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_unlock( &mt->mt_mutex );
ldap_pvt_thread_mutex_destroy( &mt->mt_mutex );
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);
}
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];
BackendInfo *orig;
slap_callback cb = {0};
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_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];
orig = opm.o_bd->bd_info;
opm.o_bd->bd_info = on->on_info->oi_orig;
opm.o_bd->be_modify( &opm, rs );
}
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_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 );
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;
}
}
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
*/
ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
for ( sm = opc->smatches; sm; sm=sm->sm_next ) {
if ( sm->sm_op->s_op->o_abandon )
continue;
syncprov_sendresp( op, opc, sm->sm_op, NULL,
LDAP_SYNC_DELETE, 1 );
}
ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
break;
}
}
}
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 );
}
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 ( 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;
} 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 )
{
Operation *op2;
int i, alen = 0;
size_t size;
char *ptr;
/* 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_malloc( size );
*op2 = *op;
op2->o_hdr = (Opheader *)(op2+1);
*op2->o_hdr = *op->o_hdr;
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_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_val = ptr;
ptr = lutil_strcopy(ptr, op->o_req_dn.bv_val) + 1;
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 );
op2->o_controls = NULL;
op2->o_callback = NULL;
so->s_op = op2;
/* Increment number of ops so that idletimeout ignores 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_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;
syncprov_info_t *si = 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 ) {
int i;
/* 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 );
Debug( LDAP_DEBUG_ANY, "bogus referral in context\n",0,0,0 );
return SLAP_CB_CONTINUE;
}
if ( srs->sr_state.ctxcsn ) {
Attribute *a = attr_find( rs->sr_entry->e_attrs,
slap_schema.si_ad_entryCSN );
/* Don't send the ctx entry twice */
if ( 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,
&op->ors_filter->f_and->f_ava->aa_value,
srs->sr_state.sid, 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, LDAP_SYNC_REFRESH_PRESENTS );
} else {
int locked = 0;
/* It's RefreshAndPersist, transition to Persist phase */
syncprov_sendinfo( op, rs, rs->sr_nentries ?
LDAP_TAG_SYNC_REFRESH_PRESENT : LDAP_TAG_SYNC_REFRESH_DELETE,
&cookie, 1, NULL, 0 );
/* Flush any queued persist messages */
if ( ss->ss_so->s_res ) {
syncres *sr, *srnext;
Entry *e;
opcookie opc;
opc.son = on;
ldap_pvt_thread_mutex_lock( &ss->ss_so->s_mutex );
locked = 1;
for (sr = ss->ss_so->s_res; sr; sr=srnext) {
int rc = LDAP_SUCCESS;
srnext = sr->s_next;
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 ) {
op->o_bd->bd_info = (BackendInfo *)on->on_info;
rc = be_entry_get_rw( op, &opc.sndn, NULL, NULL, 0, &e );
op->o_bd->bd_info = (BackendInfo *)on;
}
if ( rc == LDAP_SUCCESS )
syncprov_sendresp( op, &opc, ss->ss_so, e,
sr->s_mode, 0 );
if ( e ) {
op->o_bd->bd_info = (BackendInfo *)on->on_info;
be_entry_release_r( op, e );
op->o_bd->bd_info = (BackendInfo *)on;
}
ch_free( sr );
}
ss->ss_so->s_res = NULL;
ss->ss_so->s_restail = NULL;
}
/* Turn off the refreshing flag */
ss->ss_so->s_flags ^= PS_IS_REFRESHING;
if ( locked )
ldap_pvt_thread_mutex_unlock( &ss->ss_so->s_mutex );
/* Detach this Op from frontend control */
syncprov_detach_op( op, ss->ss_so );
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;
Filter *fand, *fava;
syncops *sop = NULL;
searchstate *ss;
sync_control *srs;
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];
/* 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;
/* 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 );
ldap_pvt_thread_mutex_lock( &si->si_ops_mutex );
sop->s_sid = srs->sr_state.sid;
sop->s_rid = srs->sr_state.rid;
sop->s_next = si->si_ops;
sop->s_inuse = 1;
si->si_ops = sop;
ldap_pvt_thread_mutex_unlock( &si->si_ops_mutex );
}
/* If we have a cookie, handle the PRESENT lookups
*/
if ( srs->sr_state.ctxcsn ) {
/* Is the CSN in a valid format? */
if ( srs->sr_state.ctxcsn->bv_len >= LDAP_LUTIL_CSNSTR_BUFSIZE ) {
send_ldap_error( op, rs, LDAP_OTHER, "invalid sync cookie" );
return rs->sr_err;
}
/* 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 just Refreshing and nothing has changed, shortcut it */
if ( bvmatch( srs->sr_state.ctxcsn, &si->si_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;
} else
/* If context has changed, check for Present UUIDs */
if ( syncprov_findcsn( op, FIND_PRESENT ) != LDAP_SUCCESS ) {
send_ldap_result( op, rs );
return rs->sr_err;
}
}
}
/* Append CSN range to search filter, save original filter
* for persistent search evaluation
*/
if ( sop ) {
sop->s_filterstr= op->ors_filterstr;
}
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 );
fava->f_choice = LDAP_FILTER_LE;
fava->f_ava = op->o_tmpalloc( sizeof(AttributeAssertion), op->o_tmpmemctx );
fava->f_ava->aa_desc = slap_schema.si_ad_entryCSN;
ldap_pvt_thread_mutex_lock( &si->si_csn_mutex );
ber_dupbv_x( &fava->f_ava->aa_value, &si->si_ctxcsn, op->o_tmpmemctx );
ldap_pvt_thread_mutex_unlock( &si->si_csn_mutex );
fand->f_and = fava;
if ( gotstate ) {
fava->f_next = op->o_tmpalloc( sizeof(Filter), op->o_tmpmemctx );
fava = fava->f_next;
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;
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 );
shortcut:
/* 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;
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;
}
static int
syncprov_db_config(
BackendDB *be,
const char *fname,
int lineno,
int argc,
char **argv
)
{
slap_overinst *on = (slap_overinst *)be->bd_info;
syncprov_info_t *si = (syncprov_info_t *)on->on_bi.bi_private;
if ( strcasecmp( argv[ 0 ], "syncprov-checkpoint" ) == 0 ) {
if ( argc != 3 ) {
fprintf( stderr, "%s: line %d: wrong number of arguments in "
"\"syncprov-checkpoint <ops> <minutes>\"\n", fname, lineno );
return -1;
}
si->si_chkops = atoi( argv[1] );
si->si_chktime = atoi( argv[2] ) * 60;
return 0;
}
return SLAP_CONF_UNKNOWN;
}
/* Cheating - we have no thread pool context for these functions,
* so make one.
*/
typedef struct thread_keys {
void *key;
void *data;
ldap_pvt_thread_pool_keyfree_t *xfree;
} thread_keys;
#define MAXKEYS 32
/* A fake thread context */
static thread_keys thrctx[MAXKEYS];
/* 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;
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 ) {
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_r( op, e );
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;
syncprov_findcsn( op, FIND_MAXCSN );
}
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, write the new value out.
*/
if ( strcmp( si->si_ctxcsnbuf, ctxcsnbuf )) {
SlapReply rs = {REP_RESULT};
syncprov_checkpoint( op, &rs, on );
}
op->o_bd->bd_info = (BackendInfo *)on;
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;
int i;
if ( si->si_numops ) {
Connection conn;
char opbuf[OPERATION_BUFFER_SIZE];
Operation *op = (Operation *)opbuf;
SlapReply rs = {REP_RESULT};
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 );
}
for ( i=0; thrctx[i].key; i++) {
if ( thrctx[i].xfree )
thrctx[i].xfree( thrctx[i].key, thrctx[i].data );
thrctx[i].key = NULL;
}
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;
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;
BerElement *ber;
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 = ber_init( &ctrl->ldctl_value );
if( ber == NULL ) {
rs->sr_text = "internal error";
return LDAP_OTHER;
}
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, /*{*/ "o", &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_bvarray_add( &sr->sr_state.octet_str, &cookie );
slap_parse_sync_cookie( &sr->sr_state );
}
op->o_controls[slap_cids.sc_LDAPsync] = sr;
(void) ber_free( ber, 1 );
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 ) {
fprintf( stderr, "Failed to register control %d\n", rc );
return rc;
}
syncprov.on_bi.bi_type = "syncprov";
syncprov.on_bi.bi_db_init = syncprov_db_init;
syncprov.on_bi.bi_db_config = syncprov_db_config;
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;
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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