/*
- * This file contains housekeeping tasks which periodically
- * need to be executed.
+ * This file contains miscellaneous housekeeping tasks.
*
+ * Copyright (c) 1987-2011 by the citadel.org team
+ *
+ * This program is open source software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License, version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
*/
+#include "sysdep.h"
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
-#include <time.h>
+#include <fcntl.h>
+
+#if TIME_WITH_SYS_TIME
+# include <sys/time.h>
+# include <time.h>
+#else
+# if HAVE_SYS_TIME_H
+# include <sys/time.h>
+# else
+# include <time.h>
+# endif
+#endif
+
#include <ctype.h>
#include <string.h>
#include <errno.h>
-#include <pthread.h>
+#include <limits.h>
+#include <sys/types.h>
+#ifdef HAVE_SYS_SELECT_H
+#include <sys/select.h>
+#endif
+#include <syslog.h>
+#include <libcitadel.h>
#include "citadel.h"
#include "server.h"
-#include "proto.h"
-
-/*
- * Terminate idle sessions. This function pounds through the session table
- * comparing the current time to each session's time-of-last-command. If an
- * idle session is found it is terminated, then the search restarts at the
- * beginning because the pointer to our place in the list becomes invalid.
- */
-void terminate_idle_sessions(void) {
- struct CitContext *ccptr;
- time_t now;
-
- time(&now);
- for (ccptr = ContextList; ccptr != NULL; ccptr = ccptr->next) {
- if ( (ccptr!=CC)
- && (config.c_sleeping > 0)
- && (now - (ccptr->lastcmd) > config.c_sleeping) ) {
- lprintf(3, "Session %d timed out\n", ccptr->cs_pid);
- kill_session(ccptr->cs_pid);
- ccptr = ContextList;
- }
- }
- }
+#include "serv_extensions.h"
+#include "citserver.h"
+#include "config.h"
+#include "housekeeping.h"
+#include "sysdep_decls.h"
+#include "room_ops.h"
+#include "database.h"
+#include "msgbase.h"
+#include "journaling.h"
+#include "ctdl_module.h"
+#include "threads.h"
-/*
- * Main housekeeping function. This gets run whenever a session terminates.
- */
-void do_housekeeping() {
-
- begin_critical_section(S_HOUSEKEEPING);
- /*
- * Terminate idle sessions.
- */
- lprintf(7, "Calling terminate_idle_sessions()\n");
- terminate_idle_sessions();
-
- /*
- * If the server is scheduled to shut down the next time all
- * users are logged out, now's the time to do it.
- */
+void check_sched_shutdown(void) {
if ((ScheduledShutdown == 1) && (ContextList == NULL)) {
- lprintf(3, "Scheduled shutdown initiating.\n");
- master_cleanup();
- }
- end_critical_section(S_HOUSEKEEPING);
+ syslog(LOG_NOTICE, "Scheduled shutdown initiating.\n");
+ server_shutting_down = 1;
}
+}
* Check (and fix) floor reference counts. This doesn't need to be done
* very often, since the counts should remain correct during normal operation.
*/
-void check_ref_counts() {
- int ref[MAXFLOORS];
- struct quickroom qrbuf;
+void check_ref_counts_backend(struct ctdlroom *qrbuf, void *data) {
+
+ int *new_refcounts;
+
+ new_refcounts = (int *) data;
+
+ ++new_refcounts[(int)qrbuf->QRfloor];
+}
+
+void check_ref_counts(void) {
struct floor flbuf;
int a;
- for (a=0; a<MAXFLOORS; ++a) ref[a] = 0;
-
- for (a=0; a<MAXROOMS; ++a) {
- getroom(&qrbuf, a);
- if (qrbuf.QRflags & QR_INUSE) {
- ++ref[(int)qrbuf.QRfloor];
- }
- }
+ int new_refcounts[MAXFLOORS];
+
+ syslog(LOG_DEBUG, "Checking floor reference counts\n");
+ for (a=0; a<MAXFLOORS; ++a) {
+ new_refcounts[a] = 0;
+ }
+
+ cdb_begin_transaction();
+ CtdlForEachRoom(check_ref_counts_backend, (void *)new_refcounts );
+ cdb_end_transaction();
for (a=0; a<MAXFLOORS; ++a) {
lgetfloor(&flbuf, a);
- flbuf.f_ref_count = ref[a];
- if (ref[a] > 0) flbuf.f_flags = flbuf.f_flags | QR_INUSE ;
- lputfloor(&flbuf, a);
+ flbuf.f_ref_count = new_refcounts[a];
+ if (new_refcounts[a] > 0) {
+ flbuf.f_flags = flbuf.f_flags | QR_INUSE;
}
- }
+ else {
+ flbuf.f_flags = flbuf.f_flags & ~QR_INUSE;
+ }
+ lputfloor(&flbuf, a);
+ syslog(LOG_DEBUG, "Floor %d: %d rooms\n", a, new_refcounts[a]);
+ }
+}
+
+/*
+ * This is the housekeeping loop. Worker threads come through here after
+ * processing client requests but before jumping back into the pool. We
+ * only allow housekeeping to execute once per minute, and we only allow one
+ * instance to run at a time.
+ */
+static int housekeeping_in_progress = 0;
+static time_t last_timer = 0L;
+void do_housekeeping(void) {
+ int do_housekeeping_now = 0;
+ int do_perminute_housekeeping_now = 0;
+ time_t now;
+
+ /*
+ * We do it this way instead of wrapping the whole loop in an
+ * S_HOUSEKEEPING critical section because it eliminates the need to
+ * potentially have multiple concurrent mutexes in progress.
+ */
+ begin_critical_section(S_HOUSEKEEPING);
+ if (housekeeping_in_progress == 0) {
+ do_housekeeping_now = 1;
+ housekeeping_in_progress = 1;
+ }
+ end_critical_section(S_HOUSEKEEPING);
+ if (do_housekeeping_now == 0) {
+ return;
+ }
+
+ /*
+ * Ok, at this point we've made the decision to run the housekeeping
+ * loop. Everything below this point is real work.
+ */
+
+ now = time(NULL);
+ if ( (now - last_timer) > (time_t)60 ) {
+ do_perminute_housekeeping_now = 1;
+ last_timer = time(NULL);
+ }
+
+ /* First, do the "as often as needed" stuff... */
+ JournalRunQueue();
+ PerformSessionHooks(EVT_HOUSE);
+
+ /* Then, do the "once per minute" stuff... */
+ if (do_perminute_housekeeping_now) {
+ cdb_check_handles(); /* suggested by Justin Case */
+ PerformSessionHooks(EVT_TIMER); /* Run any timer hooks */
+ }
+
+ /*
+ * All done.
+ */
+ begin_critical_section(S_HOUSEKEEPING);
+ housekeeping_in_progress = 0;
+ end_critical_section(S_HOUSEKEEPING);
+}
projects / citadel.git / blobdiff