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Add strictrefresh syncrepl option

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Only affects delta-syncrepl - stop listening to clients while
refresh is running.
This commit is contained in:
Howard Chu 2011-04-15 11:13:38 -07:00
parent d6eb465bca
commit 9e00b6cc6c
4 changed files with 67 additions and 1 deletions
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27
servers/slapd/connection.c
View File

@ -225,6 +225,7 @@ int connections_timeout_idle(time_t now)
*/
if(( c->c_n_ops_executing && !c->c_writewaiter)
|| c->c_conn_state == SLAP_C_CLIENT ) {
connection_done( c );
continue;
}
@ -243,16 +244,40 @@ int connections_timeout_idle(time_t now)
connection_closing( c, "writetimeout" );
connection_close( c );
i++;
continue;
}
}
connection_done( c );
}
connection_done( c );
if ( old && !writers )
slapd_clr_writetime( old );
return i;
}
/* Drop all client connections */
void connections_drop()
{
Connection* c;
int connindex;
for( c = connection_first( &connindex );
c != NULL;
c = connection_next( c, &connindex ) )
{
/* Don't close a slow-running request or a persistent
* outbound connection.
*/
if(( c->c_n_ops_executing && !c->c_writewaiter)
|| c->c_conn_state == SLAP_C_CLIENT ) {
connection_done( c );
continue;
}
connection_closing( c, "dropping" );
connection_close( c );
}
}
static Connection* connection_get( ber_socket_t s )
{
Connection *c;

22
servers/slapd/daemon.c
View File

@ -3048,6 +3048,28 @@ slapd_get_listeners( void )
return slap_listeners;
}
/* Reject all incoming requests */
void
slap_suspend_listeners( void )
{
int i;
for (i=0; slap_listeners[i]; i++) {
slap_listeners[i]->sl_mute = 1;
listen( slap_listeners[i]->sl_sd, 0 );
}
}
/* Resume after a suspend */
void
slap_resume_listeners( void )
{
int i;
for (i=0; slap_listeners[i]; i++) {
slap_listeners[i]->sl_mute = 0;
listen( slap_listeners[i]->sl_sd, SLAPD_LISTEN_BACKLOG );
}
}
void
slap_wake_listener()
{

4
servers/slapd/proto-slap.h
View File

@ -760,6 +760,7 @@ LDAP_SLAPD_F (int) connections_init LDAP_P((void));
LDAP_SLAPD_F (int) connections_shutdown LDAP_P((void));
LDAP_SLAPD_F (int) connections_destroy LDAP_P((void));
LDAP_SLAPD_F (int) connections_timeout_idle LDAP_P((time_t));
LDAP_SLAPD_F (void) connections_drop LDAP_P((void));
LDAP_SLAPD_F (Connection *) connection_client_setup LDAP_P((
ber_socket_t s,
@ -867,6 +868,9 @@ LDAP_SLAPD_F (RETSIGTYPE) slap_sig_shutdown LDAP_P((int sig));
LDAP_SLAPD_F (RETSIGTYPE) slap_sig_wake LDAP_P((int sig));
LDAP_SLAPD_F (void) slap_wake_listener LDAP_P((void));
LDAP_SLAPD_F (void) slap_suspend_listeners LDAP_P((void));
LDAP_SLAPD_F (void) slap_resume_listeners LDAP_P((void));
LDAP_SLAPD_F (void) slapd_set_write LDAP_P((ber_socket_t s, int wake));
LDAP_SLAPD_F (void) slapd_clr_write LDAP_P((ber_socket_t s, int wake));
LDAP_SLAPD_F (void) slapd_set_read LDAP_P((ber_socket_t s, int wake));

15
servers/slapd/syncrepl.c
View File

@ -111,6 +111,7 @@ typedef struct syncinfo_s {
int si_syncdata;
int si_logstate;
int si_got;
int si_strict_refresh; /* stop listening during fallback refresh */
ber_int_t si_msgid;
Avlnode *si_presentlist;
LDAP *si_ld;
@ -961,6 +962,10 @@ do_syncrep2(
bdn.bv_val[bdn.bv_len] = '\0';
Debug( LDAP_DEBUG_SYNC, "do_syncrep2: %s delta-sync lost sync on (%s), switching to REFRESH\n",
si->si_ridtxt, bdn.bv_val, 0 );
if (si->si_strict_refresh) {
slap_suspend_listeners();
connections_drop();
}
break;
default:
break;
@ -1023,6 +1028,10 @@ do_syncrep2(
si->si_logstate = SYNCLOG_FALLBACK;
Debug( LDAP_DEBUG_SYNC, "do_syncrep2: %s delta-sync lost sync, switching to REFRESH\n",
si->si_ridtxt, 0, 0 );
if (si->si_strict_refresh) {
slap_suspend_listeners();
connections_drop();
}
}
rc = err;
goto done;
@ -1118,6 +1127,7 @@ do_syncrep2(
&& si->si_logstate == SYNCLOG_FALLBACK ) {
si->si_logstate = SYNCLOG_LOGGING;
rc = LDAP_SYNC_REFRESH_REQUIRED;
slap_resume_listeners();
} else {
rc = -2;
}
@ -4117,6 +4127,7 @@ config_suffixm( ConfigArgs *c, syncinfo_t *si )
#define LOGBASESTR "logbase"
#define LOGFILTERSTR "logfilter"
#define SUFFIXMSTR "suffixmassage"
#define STRICT_REFRESH "strictrefresh"
/* FIXME: undocumented */
#define EXATTRSSTR "exattrs"
@ -4615,6 +4626,10 @@ parse_syncrepl_line(
val = c->argv[ i ] + STRLENOF( SYNCDATASTR "=" );
si->si_syncdata = verb_to_mask( val, datamodes );
si->si_got |= GOT_SYNCDATA;
} else if ( !strncasecmp( c->argv[ i ], STRICT_REFRESH,
STRLENOF( STRICT_REFRESH ) ) )
{
si->si_strict_refresh = 1;
} else if ( bindconf_parse( c->argv[i], &si->si_bindconf ) ) {
snprintf( c->cr_msg, sizeof( c->cr_msg ),
"Error: parse_syncrepl_line: "