2 * This file contains miscellaneous housekeeping tasks.
4 * Copyright (c) 1987-2021 by the citadel.org team
6 * This program is open source software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, version 3.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
16 #include <libcitadel.h>
18 #include "ctdl_module.h"
19 #include "serv_extensions.h"
21 #include "internet_addressing.h"
23 #include "journaling.h"
24 #include "citadel_ldap.h"
26 void check_sched_shutdown(void) {
27 if ((ScheduledShutdown == 1) && (ContextList == NULL)) {
28 syslog(LOG_NOTICE, "housekeeping: scheduled shutdown initiating");
29 server_shutting_down = 1;
35 * Check (and fix) floor reference counts. This doesn't need to be done
36 * very often, since the counts should remain correct during normal operation.
38 void check_ref_counts_backend(struct ctdlroom *qrbuf, void *data) {
42 new_refcounts = (int *) data;
44 ++new_refcounts[(int)qrbuf->QRfloor];
48 void check_ref_counts(void) {
52 int new_refcounts[MAXFLOORS];
54 syslog(LOG_DEBUG, "housekeeping: checking floor reference counts");
55 for (a=0; a<MAXFLOORS; ++a) {
59 cdb_begin_transaction();
60 CtdlForEachRoom(check_ref_counts_backend, (void *)new_refcounts );
61 cdb_end_transaction();
63 for (a=0; a<MAXFLOORS; ++a) {
65 flbuf.f_ref_count = new_refcounts[a];
66 if (new_refcounts[a] > 0) {
67 flbuf.f_flags = flbuf.f_flags | QR_INUSE;
70 flbuf.f_flags = flbuf.f_flags & ~QR_INUSE;
73 syslog(LOG_DEBUG, "housekeeping: floor %d has %d rooms", a, new_refcounts[a]);
79 * Provide hints as to whether we have any memory leaks
81 void keep_an_eye_on_memory_usage(void) {
82 static void *original_brk = NULL;
83 if (!original_brk) original_brk = sbrk(0); // Remember the original program break so we can test for leaks
84 syslog(LOG_DEBUG, "original_brk=%lx, current_brk=%lx, addl=%ld", (long)original_brk, (long)sbrk(0), (long)(sbrk(0)-original_brk)); // FIXME not so noisy please
89 * This is the housekeeping loop. Worker threads come through here after
90 * processing client requests but before jumping back into the pool. We
91 * only allow housekeeping to execute once per minute, and we only allow one
92 * instance to run at a time.
94 static int housekeeping_in_progress = 0;
95 static time_t last_timer = 0L;
96 void do_housekeeping(void) {
97 int do_housekeeping_now = 0;
98 int do_perminute_housekeeping_now = 0;
102 * We do it this way instead of wrapping the whole loop in an
103 * S_HOUSEKEEPING critical section because it eliminates the need to
104 * potentially have multiple concurrent mutexes in progress.
106 begin_critical_section(S_HOUSEKEEPING);
107 if (housekeeping_in_progress == 0) {
108 do_housekeeping_now = 1;
109 housekeeping_in_progress = 1;
111 end_critical_section(S_HOUSEKEEPING);
114 if ( (do_housekeeping_now == 0) && (!CtdlIsSingleUser()) ) {
115 if ( (now - last_timer) > (time_t)300 ) {
117 "housekeeping: WARNING: housekeeping loop has not run for %ld minutes. Is something stuck?",
118 ((now - last_timer) / 60)
125 * Ok, at this point we've made the decision to run the housekeeping
126 * loop. Everything below this point is real work.
129 if ( (now - last_timer) > (time_t)60 ) {
130 do_perminute_housekeeping_now = 1;
131 last_timer = time(NULL);
134 /* First, do the "as often as needed" stuff... */
136 PerformSessionHooks(EVT_HOUSE);
138 /* Then, do the "once per minute" stuff... */
139 if (do_perminute_housekeeping_now) {
141 PerformSessionHooks(EVT_TIMER); // Run all registered TIMER hooks
143 #ifdef HAVE_LDAP // LDAP sync isn't in a module so we can put it here
144 static time_t last_ldap_sync = 0L;
145 if ( (now - last_ldap_sync) > (time_t)CtdlGetConfigLong("c_ldap_sync_freq") ) {
146 CtdlSynchronizeUsersFromLDAP();
147 last_ldap_sync = time(NULL);
151 keep_an_eye_on_memory_usage();
157 begin_critical_section(S_HOUSEKEEPING);
158 housekeeping_in_progress = 0;
159 end_critical_section(S_HOUSEKEEPING);
163 void CtdlDisableHouseKeeping(void) {
164 int ActiveBackgroundJobs;
165 int do_housekeeping_now = 0;
166 struct CitContext *nptr;
169 retry_block_housekeeping:
170 syslog(LOG_INFO, "housekeeping: trying to disable services");
171 begin_critical_section(S_HOUSEKEEPING);
172 if (housekeeping_in_progress == 0) {
173 do_housekeeping_now = 1;
174 housekeeping_in_progress = 1;
176 end_critical_section(S_HOUSEKEEPING);
177 if (do_housekeeping_now == 0) {
179 goto retry_block_housekeeping;
182 syslog(LOG_INFO, "housekeeping: checking for running server jobs");
184 retry_wait_for_contexts:
185 /* So that we don't keep the context list locked for a long time
186 * we create a copy of it first
188 ActiveBackgroundJobs = 0;
189 nptr = CtdlGetContextArray(&nContexts) ;
192 for (i=0; i<nContexts; i++)
194 if ((nptr[i].state != CON_SYS) || (nptr[i].lastcmd == 0))
196 ActiveBackgroundJobs ++;
197 syslog(LOG_INFO, "jousekeeping: job CC[%d] active; use TERM if you don't want to wait for it", nptr[i].cs_pid);
204 if (ActiveBackgroundJobs != 0) {
205 syslog(LOG_INFO, "housekeeping: found %d running jobs, need to wait", ActiveBackgroundJobs);
207 goto retry_wait_for_contexts;
209 syslog(LOG_INFO, "housekeeping: disabled now.");
213 void CtdlEnableHouseKeeping(void) {
214 begin_critical_section(S_HOUSEKEEPING);
215 housekeeping_in_progress = 0;
216 end_critical_section(S_HOUSEKEEPING);