/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
- * Copyright 1998-2008 The OpenLDAP Foundation.
+ * Copyright 1998-2009 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
static const char conn_lost_str[] = "connection lost";
/* structure state (protected by connections_mutex) */
-#define SLAP_C_UNINITIALIZED 0x00 /* MUST BE ZERO (0) */
-#define SLAP_C_UNUSED 0x01
-#define SLAP_C_USED 0x02
-#define SLAP_C_PENDING 0x03
+enum sc_struct_state {
+ SLAP_C_UNINITIALIZED = 0, /* MUST BE ZERO (0) */
+ SLAP_C_UNUSED,
+ SLAP_C_USED,
+ SLAP_C_PENDING
+};
/* connection state (protected by c_mutex ) */
-#define SLAP_C_INVALID 0x00 /* MUST BE ZERO (0) */
-#define SLAP_C_INACTIVE 0x01 /* zero threads */
-#define SLAP_C_ACTIVE 0x02 /* one or more threads */
-#define SLAP_C_BINDING 0x03 /* binding */
-#define SLAP_C_CLOSING 0x04 /* closing */
-#define SLAP_C_CLIENT 0x05 /* outbound client conn */
+enum sc_conn_state {
+ SLAP_C_INVALID = 0, /* MUST BE ZERO (0) */
+ SLAP_C_INACTIVE, /* zero threads */
+ SLAP_C_CLOSING, /* closing */
+ SLAP_C_ACTIVE, /* one or more threads */
+ SLAP_C_BINDING, /* binding */
+ SLAP_C_CLIENT /* outbound client conn */
+};
const char *
connection_state2str( int state )
switch( state ) {
case SLAP_C_INVALID: return "!";
case SLAP_C_INACTIVE: return "|";
+ case SLAP_C_CLOSING: return "C";
case SLAP_C_ACTIVE: return "";
case SLAP_C_BINDING: return "B";
- case SLAP_C_CLOSING: return "C";
case SLAP_C_CLIENT: return "L";
}
if( connections[i].c_struct_state != SLAP_C_UNINITIALIZED ) {
ber_sockbuf_free( connections[i].c_sb );
ldap_pvt_thread_mutex_destroy( &connections[i].c_mutex );
- ldap_pvt_thread_mutex_destroy( &connections[i].c_write_mutex );
- ldap_pvt_thread_cond_destroy( &connections[i].c_write_cv );
+ ldap_pvt_thread_mutex_destroy( &connections[i].c_write1_mutex );
+ ldap_pvt_thread_mutex_destroy( &connections[i].c_write2_mutex );
+ ldap_pvt_thread_cond_destroy( &connections[i].c_write1_cv );
+ ldap_pvt_thread_cond_destroy( &connections[i].c_write2_cv );
#ifdef LDAP_SLAPI
if ( slapi_plugins_used ) {
slapi_int_free_object_extensions( SLAPI_X_EXT_CONNECTION,
*/
int connections_timeout_idle(time_t now)
{
- int i = 0;
+ int i = 0, writers = 0;
int connindex;
Connection* c;
+ time_t old;
+
+ old = slapd_get_writetime();
for( c = connection_first( &connindex );
c != NULL;
c = connection_next( c, &connindex ) )
{
/* Don't timeout a slow-running request or a persistent
- * outbound connection */
- if( c->c_n_ops_executing || c->c_conn_state == SLAP_C_CLIENT ) {
+ * outbound connection. But if it has a writewaiter, see
+ * if the waiter has been there too long.
+ */
+ if(( c->c_n_ops_executing && !c->c_writewaiter)
+ || c->c_conn_state == SLAP_C_CLIENT ) {
continue;
}
connection_closing( c, "idletimeout" );
connection_close( c );
i++;
+ continue;
+ }
+ if ( c->c_writewaiter ) {
+ writers = 1;
+ if( difftime( c->c_activitytime+global_writetimeout, now) < 0 ) {
+ /* close it */
+ connection_closing( c, "writetimeout" );
+ connection_close( c );
+ i++;
+ }
}
}
connection_done( c );
+ if ( !writers )
+ slapd_clr_writetime( old );
return i;
}
assert( c->c_conn_state == SLAP_C_INVALID );
assert( c->c_sd == AC_SOCKET_INVALID );
- Debug( LDAP_DEBUG_TRACE,
+ Debug( LDAP_DEBUG_CONNS,
"connection_get(%d): connection not used\n",
s, 0, 0 );
/* should check status of thread calls */
ldap_pvt_thread_mutex_init( &c->c_mutex );
- ldap_pvt_thread_mutex_init( &c->c_write_mutex );
- ldap_pvt_thread_cond_init( &c->c_write_cv );
+ ldap_pvt_thread_mutex_init( &c->c_write1_mutex );
+ ldap_pvt_thread_mutex_init( &c->c_write2_mutex );
+ ldap_pvt_thread_cond_init( &c->c_write1_cv );
+ ldap_pvt_thread_cond_init( &c->c_write2_cv );
#ifdef LDAP_SLAPI
if ( slapi_plugins_used ) {
assert( c->c_sasl_bindop == NULL );
assert( c->c_currentber == NULL );
assert( c->c_writewaiter == 0);
+ assert( c->c_writers == 0);
c->c_listener = listener;
c->c_sd = s;
if ( flags & CONN_IS_CLIENT ) {
c->c_connid = 0;
+ ldap_pvt_thread_mutex_lock( &connections_mutex );
c->c_conn_state = SLAP_C_CLIENT;
c->c_struct_state = SLAP_C_USED;
+ ldap_pvt_thread_mutex_unlock( &connections_mutex );
c->c_close_reason = "?"; /* should never be needed */
ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_SET_FD, &sfd );
ldap_pvt_thread_mutex_unlock( &c->c_mutex );
id = c->c_connid = conn_nextid++;
ldap_pvt_thread_mutex_unlock( &conn_nextid_mutex );
+ ldap_pvt_thread_mutex_lock( &connections_mutex );
c->c_conn_state = SLAP_C_INACTIVE;
c->c_struct_state = SLAP_C_USED;
+ ldap_pvt_thread_mutex_unlock( &connections_mutex );
c->c_close_reason = "?"; /* should never be needed */
c->c_ssf = c->c_transport_ssf = ssf;
assert( LDAP_STAILQ_EMPTY(&c->c_txn_ops) );
#endif
assert( c->c_writewaiter == 0);
+ assert( c->c_writers == 0);
/* only for stats (print -1 as "%lu" may give unexpected results ;) */
connid = c->c_connid;
}
}
-int connection_state_closing( Connection *c )
+int connection_valid( Connection *c )
{
/* c_mutex must be locked by caller */
- int state;
assert( c != NULL );
- assert( c->c_struct_state == SLAP_C_USED );
-
- state = c->c_conn_state;
- assert( state != SLAP_C_INVALID );
-
- return state == SLAP_C_CLOSING;
+ return c->c_struct_state == SLAP_C_USED &&
+ c->c_conn_state >= SLAP_C_ACTIVE &&
+ c->c_conn_state <= SLAP_C_CLIENT;
}
static void connection_abandon( Connection *c )
/* c_mutex must be locked by caller */
if( c->c_conn_state != SLAP_C_CLOSING ) {
- Debug( LDAP_DEBUG_TRACE,
+ Debug( LDAP_DEBUG_CONNS,
"connection_closing: readying conn=%lu sd=%d for close\n",
c->c_connid, c->c_sd, 0 );
/* update state to closing */
connection_abandon( c );
/* wake write blocked operations */
- if ( c->c_writewaiter ) {
- ldap_pvt_thread_cond_signal( &c->c_write_cv );
- /* ITS#4667 this may allow another thread to drop into
- * connection_resched / connection_close before we
- * finish, but that's OK.
- */
- slapd_clr_write( c->c_sd, 1 );
- ldap_pvt_thread_mutex_unlock( &c->c_mutex );
- ldap_pvt_thread_mutex_lock( &c->c_write_mutex );
- ldap_pvt_thread_mutex_lock( &c->c_mutex );
- ldap_pvt_thread_mutex_unlock( &c->c_write_mutex );
+ ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
+ if ( c->c_writers > 0 ) {
+ c->c_writers = -c->c_writers;
+ ldap_pvt_thread_cond_broadcast( &c->c_write1_cv );
+ ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
+ if ( c->c_writewaiter ) {
+ ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
+ ldap_pvt_thread_cond_signal( &c->c_write2_cv );
+ slapd_clr_write( c->c_sd, 1 );
+ ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
+ }
+ ldap_pvt_thread_mutex_lock( &c->c_write1_mutex );
+ while ( c->c_writers ) {
+ ldap_pvt_thread_cond_wait( &c->c_write1_cv, &c->c_write1_mutex );
+ }
+ ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
} else {
+ ldap_pvt_thread_mutex_unlock( &c->c_write1_mutex );
slapd_clr_write( c->c_sd, 1 );
}
{
assert( connections != NULL );
assert( c != NULL );
-
- /* ITS#4667 we may have gotten here twice */
- if ( c->c_conn_state == SLAP_C_INVALID )
- return;
-
assert( c->c_struct_state == SLAP_C_USED );
assert( c->c_conn_state == SLAP_C_CLOSING );
if ( !LDAP_STAILQ_EMPTY(&c->c_ops) ||
!LDAP_STAILQ_EMPTY(&c->c_pending_ops) )
{
- Debug( LDAP_DEBUG_TRACE,
+ Debug( LDAP_DEBUG_CONNS,
"connection_close: deferring conn=%lu sd=%d\n",
c->c_connid, c->c_sd, 0 );
return;
for(; *index < dtblsize; (*index)++) {
int c_struct;
if( connections[*index].c_struct_state == SLAP_C_UNINITIALIZED ) {
+ /* FIXME: accessing c_conn_state without locking c_mutex */
assert( connections[*index].c_conn_state == SLAP_C_INVALID );
continue;
}
if( connections[*index].c_struct_state == SLAP_C_USED ) {
- assert( connections[*index].c_conn_state != SLAP_C_INVALID );
c = &connections[(*index)++];
if ( ldap_pvt_thread_mutex_trylock( &c->c_mutex )) {
/* avoid deadlock */
continue;
}
}
+ assert( c->c_conn_state != SLAP_C_INVALID );
break;
}
if ( c_struct == SLAP_C_PENDING )
continue;
assert( c_struct == SLAP_C_UNUSED );
+ /* FIXME: accessing c_conn_state without locking c_mutex */
assert( connections[*index].c_conn_state == SLAP_C_INVALID );
}
slap_counters_t *sc;
void *vsc = NULL;
- if ( ldap_pvt_thread_pool_getkey( ctx, conn_counter_init, &vsc, NULL ) || !vsc ) {
+ if ( ldap_pvt_thread_pool_getkey(
+ ctx, (void *)conn_counter_init, &vsc, NULL ) || !vsc ) {
vsc = ch_malloc( sizeof( slap_counters_t ));
sc = vsc;
slap_counters_init( sc );
- ldap_pvt_thread_pool_setkey( ctx, conn_counter_init, vsc,
+ ldap_pvt_thread_pool_setkey( ctx, (void*)conn_counter_init, vsc,
conn_counter_destroy, NULL, NULL );
ldap_pvt_thread_mutex_lock( &slap_counters.sc_mutex );
c->c_clientarg = arg;
slapd_add_internal( sfd, 0 );
- slapd_set_read( sfd, 1 );
}
return c;
}
/* get (locked) connection */
c = connection_get( s );
-
+
assert( c->c_conn_state == SLAP_C_CLIENT );
c->c_listener = NULL;
return rc;
}
+void
+connection_hangup( ber_socket_t s )
+{
+ Connection *c;
+
+ c = connection_get( s );
+ if ( c ) {
+ if ( c->c_conn_state == SLAP_C_CLIENT ) {
+ connection_return( c );
+ connection_read_activate( s );
+ } else {
+ connection_closing( c, "connection lost" );
+ connection_close( c );
+ connection_return( c );
+ }
+ }
+}
+
static int
connection_read( ber_socket_t s, conn_readinfo *cri )
{
c->c_n_read++;
if( c->c_conn_state == SLAP_C_CLOSING ) {
- Debug( LDAP_DEBUG_TRACE,
+ Debug( LDAP_DEBUG_CONNS,
"connection_read(%d): closing, ignoring input for id=%lu\n",
s, c->c_connid, 0 );
connection_return( c );
{
Operation *op;
+ if( conn->c_writewaiter )
+ return 0;
+
if( conn->c_conn_state == SLAP_C_CLOSING ) {
- Debug( LDAP_DEBUG_TRACE, "connection_resched: "
+ Debug( LDAP_DEBUG_CONNS, "connection_resched: "
"attempting closing conn=%lu sd=%d\n",
conn->c_connid, conn->c_sd, 0 );
connection_close( conn );
return 0;
}
- if( conn->c_conn_state != SLAP_C_ACTIVE || conn->c_writewaiter ) {
+ if( conn->c_conn_state != SLAP_C_ACTIVE ) {
/* other states need different handling */
return 0;
}
Debug( LDAP_DEBUG_TRACE,
"connection_write(%d): waking output for id=%lu\n",
s, c->c_connid, 0 );
- ldap_pvt_thread_cond_signal( &c->c_write_cv );
+ ldap_pvt_thread_mutex_lock( &c->c_write2_mutex );
+ ldap_pvt_thread_cond_signal( &c->c_write2_cv );
+ ldap_pvt_thread_mutex_unlock( &c->c_write2_mutex );
if ( ber_sockbuf_ctrl( c->c_sb, LBER_SB_OPT_NEEDS_READ, NULL ) ) {
slapd_set_read( s, 1 );
conn->c_send_ldap_result = slap_send_ldap_result;
conn->c_send_search_entry = slap_send_search_entry;
conn->c_send_search_reference = slap_send_search_reference;
+ conn->c_send_ldap_extended = slap_send_ldap_extended;
+ conn->c_send_ldap_intermediate = slap_send_ldap_intermediate;
conn->c_listener = (Listener *)&dummy_list;
conn->c_peer_domain = slap_empty_bv;
conn->c_peer_name = slap_empty_bv;
void *ebx = NULL;
/* Use thread keys to make sure these eventually get cleaned up */
- if ( ldap_pvt_thread_pool_getkey( ctx, connection_fake_init, &ebx,
- NULL )) {
+ if ( ldap_pvt_thread_pool_getkey( ctx, (void *)connection_fake_init,
+ &ebx, NULL )) {
eb = ch_malloc( sizeof( *eb ));
slapi_int_create_object_extensions( SLAPI_X_EXT_CONNECTION, conn );
slapi_int_create_object_extensions( SLAPI_X_EXT_OPERATION, op );
eb->eb_conn = conn->c_extensions;
eb->eb_op = op->o_hdr->oh_extensions;
- ldap_pvt_thread_pool_setkey( ctx, connection_fake_init,
+ ldap_pvt_thread_pool_setkey( ctx, (void *)connection_fake_init,
eb, connection_fake_destroy, NULL, NULL );
} else {
eb = ebx;
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