pacemaker  2.1.1-52dc28db4
Scalable High-Availability cluster resource manager
systemd.c
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1 /*
2  * Copyright 2012-2021 the Pacemaker project contributors
3  *
4  * The version control history for this file may have further details.
5  *
6  * This source code is licensed under the GNU Lesser General Public License
7  * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY.
8  */
9 
10 #include <crm_internal.h>
11 #include <crm/crm.h>
12 #include <crm/services.h>
13 #include <crm/common/mainloop.h>
14 
15 #include <sys/stat.h>
16 #include <gio/gio.h>
17 #include <services_private.h>
18 #include <systemd.h>
19 #include <dbus/dbus.h>
20 #include <pcmk-dbus.h>
21 
22 gboolean systemd_unit_exec_with_unit(svc_action_t * op, const char *unit);
23 
24 #define BUS_NAME "org.freedesktop.systemd1"
25 #define BUS_NAME_MANAGER BUS_NAME ".Manager"
26 #define BUS_NAME_UNIT BUS_NAME ".Unit"
27 #define BUS_PATH "/org/freedesktop/systemd1"
28 
29 static inline DBusMessage *
30 systemd_new_method(const char *method)
31 {
32  crm_trace("Calling: %s on " BUS_NAME_MANAGER, method);
33  return dbus_message_new_method_call(BUS_NAME, BUS_PATH, BUS_NAME_MANAGER,
34  method);
35 }
36 
37 /*
38  * Functions to manage a static DBus connection
39  */
40 
41 static DBusConnection* systemd_proxy = NULL;
42 
43 static inline DBusPendingCall *
44 systemd_send(DBusMessage *msg,
45  void(*done)(DBusPendingCall *pending, void *user_data),
46  void *user_data, int timeout)
47 {
48  return pcmk_dbus_send(msg, systemd_proxy, done, user_data, timeout);
49 }
50 
51 static inline DBusMessage *
52 systemd_send_recv(DBusMessage *msg, DBusError *error, int timeout)
53 {
54  return pcmk_dbus_send_recv(msg, systemd_proxy, error, timeout);
55 }
56 
68 static DBusMessage *
69 systemd_call_simple_method(const char *method)
70 {
71  DBusMessage *msg = systemd_new_method(method);
72  DBusMessage *reply = NULL;
73  DBusError error;
74 
75  /* Don't call systemd_init() here, because that calls this */
76  CRM_CHECK(systemd_proxy, return NULL);
77 
78  if (msg == NULL) {
79  crm_err("Could not create message to send %s to systemd", method);
80  return NULL;
81  }
82 
83  dbus_error_init(&error);
84  reply = systemd_send_recv(msg, &error, DBUS_TIMEOUT_USE_DEFAULT);
85  dbus_message_unref(msg);
86 
87  if (dbus_error_is_set(&error)) {
88  crm_err("Could not send %s to systemd: %s (%s)",
89  method, error.message, error.name);
90  dbus_error_free(&error);
91  return NULL;
92 
93  } else if (reply == NULL) {
94  crm_err("Could not send %s to systemd: no reply received", method);
95  return NULL;
96  }
97 
98  return reply;
99 }
100 
101 static gboolean
102 systemd_init(void)
103 {
104  static int need_init = 1;
105  // https://dbus.freedesktop.org/doc/api/html/group__DBusConnection.html
106 
107  if (systemd_proxy
108  && dbus_connection_get_is_connected(systemd_proxy) == FALSE) {
109  crm_warn("Connection to System DBus is closed. Reconnecting...");
110  pcmk_dbus_disconnect(systemd_proxy);
111  systemd_proxy = NULL;
112  need_init = 1;
113  }
114 
115  if (need_init) {
116  need_init = 0;
117  systemd_proxy = pcmk_dbus_connect();
118  }
119  if (systemd_proxy == NULL) {
120  return FALSE;
121  }
122  return TRUE;
123 }
124 
125 static inline char *
126 systemd_get_property(const char *unit, const char *name,
127  void (*callback)(const char *name, const char *value, void *userdata),
128  void *userdata, DBusPendingCall **pending, int timeout)
129 {
130  return systemd_proxy?
131  pcmk_dbus_get_property(systemd_proxy, BUS_NAME, unit, BUS_NAME_UNIT,
132  name, callback, userdata, pending, timeout)
133  : NULL;
134 }
135 
136 void
138 {
139  if (systemd_proxy) {
140  pcmk_dbus_disconnect(systemd_proxy);
141  systemd_proxy = NULL;
142  }
143 }
144 
145 /*
146  * end of systemd_proxy functions
147  */
148 
157 static const char *
158 systemd_unit_extension(const char *name)
159 {
160  if (name) {
161  const char *dot = strrchr(name, '.');
162 
163  if (dot && (!strcmp(dot, ".service")
164  || !strcmp(dot, ".socket")
165  || !strcmp(dot, ".mount")
166  || !strcmp(dot, ".timer")
167  || !strcmp(dot, ".path"))) {
168  return dot;
169  }
170  }
171  return NULL;
172 }
173 
174 static char *
175 systemd_service_name(const char *name)
176 {
177  if (name == NULL) {
178  return NULL;
179  }
180 
181  if (systemd_unit_extension(name)) {
182  return strdup(name);
183  }
184 
185  return crm_strdup_printf("%s.service", name);
186 }
187 
188 static void
189 systemd_daemon_reload_complete(DBusPendingCall *pending, void *user_data)
190 {
191  DBusError error;
192  DBusMessage *reply = NULL;
193  unsigned int reload_count = GPOINTER_TO_UINT(user_data);
194 
195  dbus_error_init(&error);
196  if(pending) {
197  reply = dbus_pending_call_steal_reply(pending);
198  }
199 
200  if (pcmk_dbus_find_error(pending, reply, &error)) {
201  crm_err("Could not issue systemd reload %d: %s", reload_count, error.message);
202  dbus_error_free(&error);
203 
204  } else {
205  crm_trace("Reload %d complete", reload_count);
206  }
207 
208  if(pending) {
209  dbus_pending_call_unref(pending);
210  }
211  if(reply) {
212  dbus_message_unref(reply);
213  }
214 }
215 
216 static bool
217 systemd_daemon_reload(int timeout)
218 {
219  static unsigned int reload_count = 0;
220  DBusMessage *msg = systemd_new_method("Reload");
221 
222  reload_count++;
223  CRM_ASSERT(msg != NULL);
224  systemd_send(msg, systemd_daemon_reload_complete,
225  GUINT_TO_POINTER(reload_count), timeout);
226  dbus_message_unref(msg);
227 
228  return TRUE;
229 }
230 
231 static bool
232 systemd_mask_error(svc_action_t *op, const char *error)
233 {
234  crm_trace("Could not issue %s for %s: %s", op->action, op->rsc, error);
235  if(strstr(error, "org.freedesktop.systemd1.InvalidName")
236  || strstr(error, "org.freedesktop.systemd1.LoadFailed")
237  || strstr(error, "org.freedesktop.systemd1.NoSuchUnit")) {
238 
239  if (pcmk__str_eq(op->action, "stop", pcmk__str_casei)) {
240  crm_trace("Masking %s failure for %s: unknown services are stopped", op->action, op->rsc);
241  op->rc = PCMK_OCF_OK;
242  return TRUE;
243 
244  } else {
245  crm_trace("Mapping %s failure for %s: unknown services are not installed", op->action, op->rsc);
248  return FALSE;
249  }
250  }
251 
252  return FALSE;
253 }
254 
255 static const char *
256 systemd_loadunit_result(DBusMessage *reply, svc_action_t * op)
257 {
258  const char *path = NULL;
259  DBusError error;
260 
261  if (pcmk_dbus_find_error((void*)&path, reply, &error)) {
262  if(op && !systemd_mask_error(op, error.name)) {
263  crm_err("Could not load systemd unit %s for %s: %s",
264  op->agent, op->id, error.message);
265  }
266  dbus_error_free(&error);
267 
268  } else if (!pcmk_dbus_type_check(reply, NULL, DBUS_TYPE_OBJECT_PATH,
269  __func__, __LINE__)) {
270  crm_err("Could not load systemd unit %s for %s: "
271  "systemd reply has unexpected type", op->agent, op->id);
272 
273  } else {
274  dbus_message_get_args (reply, NULL,
275  DBUS_TYPE_OBJECT_PATH, &path,
276  DBUS_TYPE_INVALID);
277  }
278 
279  if(op) {
280  if (path) {
281  systemd_unit_exec_with_unit(op, path);
282 
283  } else if (op->synchronous == FALSE) {
284  operation_finalize(op);
285  }
286  }
287 
288  return path;
289 }
290 
291 
292 static void
293 systemd_loadunit_cb(DBusPendingCall *pending, void *user_data)
294 {
295  DBusMessage *reply = NULL;
296  svc_action_t * op = user_data;
297 
298  if(pending) {
299  reply = dbus_pending_call_steal_reply(pending);
300  }
301 
302  crm_trace("Got result: %p for %p / %p for %s", reply, pending, op->opaque->pending, op->id);
303 
304  CRM_LOG_ASSERT(pending == op->opaque->pending);
305  services_set_op_pending(op, NULL);
306 
307  systemd_loadunit_result(reply, user_data);
308 
309  if(reply) {
310  dbus_message_unref(reply);
311  }
312 }
313 
314 static char *
315 systemd_unit_by_name(const gchar * arg_name, svc_action_t *op)
316 {
317  DBusMessage *msg;
318  DBusMessage *reply = NULL;
319  DBusPendingCall* pending = NULL;
320  char *name = NULL;
321 
322 /*
323  Equivalent to GetUnit if it's already loaded
324  <method name="LoadUnit">
325  <arg name="name" type="s" direction="in"/>
326  <arg name="unit" type="o" direction="out"/>
327  </method>
328  */
329 
330  if (systemd_init() == FALSE) {
331  return FALSE;
332  }
333 
334  msg = systemd_new_method("LoadUnit");
335  CRM_ASSERT(msg != NULL);
336 
337  name = systemd_service_name(arg_name);
338  CRM_LOG_ASSERT(dbus_message_append_args(msg, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID));
339  free(name);
340 
341  if(op == NULL || op->synchronous) {
342  const char *unit = NULL;
343  char *munit = NULL;
344 
345  reply = systemd_send_recv(msg, NULL,
346  (op? op->timeout : DBUS_TIMEOUT_USE_DEFAULT));
347  dbus_message_unref(msg);
348 
349  unit = systemd_loadunit_result(reply, op);
350  if(unit) {
351  munit = strdup(unit);
352  }
353  if(reply) {
354  dbus_message_unref(reply);
355  }
356  return munit;
357  }
358 
359  pending = systemd_send(msg, systemd_loadunit_cb, op, op->timeout);
360  if(pending) {
361  services_set_op_pending(op, pending);
362  }
363 
364  dbus_message_unref(msg);
365  return NULL;
366 }
367 
380 static gint
381 sort_str(gconstpointer a, gconstpointer b)
382 {
383  if (!a && !b) {
384  return 0;
385  } else if (!a) {
386  return -1;
387  } else if (!b) {
388  return 1;
389  }
390  return strcasecmp(a, b);
391 }
392 
393 GList *
395 {
396  int nfiles = 0;
397  GList *units = NULL;
398  DBusMessageIter args;
399  DBusMessageIter unit;
400  DBusMessageIter elem;
401  DBusMessage *reply = NULL;
402 
403  if (systemd_init() == FALSE) {
404  return NULL;
405  }
406 
407 /*
408  " <method name=\"ListUnitFiles\">\n" \
409  " <arg name=\"files\" type=\"a(ss)\" direction=\"out\"/>\n" \
410  " </method>\n" \
411 */
412 
413  reply = systemd_call_simple_method("ListUnitFiles");
414  if (reply == NULL) {
415  return NULL;
416  }
417  if (!dbus_message_iter_init(reply, &args)) {
418  crm_err("Could not list systemd unit files: systemd reply has no arguments");
419  dbus_message_unref(reply);
420  return NULL;
421  }
422  if (!pcmk_dbus_type_check(reply, &args, DBUS_TYPE_ARRAY,
423  __func__, __LINE__)) {
424  crm_err("Could not list systemd unit files: systemd reply has invalid arguments");
425  dbus_message_unref(reply);
426  return NULL;
427  }
428 
429  dbus_message_iter_recurse(&args, &unit);
430  for (; dbus_message_iter_get_arg_type(&unit) != DBUS_TYPE_INVALID;
431  dbus_message_iter_next(&unit)) {
432 
433  DBusBasicValue value;
434  const char *match = NULL;
435  char *unit_name = NULL;
436  char *basename = NULL;
437 
438  if(!pcmk_dbus_type_check(reply, &unit, DBUS_TYPE_STRUCT, __func__, __LINE__)) {
439  crm_warn("Skipping systemd reply argument with unexpected type");
440  continue;
441  }
442 
443  dbus_message_iter_recurse(&unit, &elem);
444  if(!pcmk_dbus_type_check(reply, &elem, DBUS_TYPE_STRING, __func__, __LINE__)) {
445  crm_warn("Skipping systemd reply argument with no string");
446  continue;
447  }
448 
449  dbus_message_iter_get_basic(&elem, &value);
450  if (value.str == NULL) {
451  crm_debug("ListUnitFiles reply did not provide a string");
452  continue;
453  }
454  crm_trace("DBus ListUnitFiles listed: %s", value.str);
455 
456  match = systemd_unit_extension(value.str);
457  if (match == NULL) {
458  // This is not a unit file type we know how to manage
459  crm_debug("ListUnitFiles entry '%s' is not supported as resource",
460  value.str);
461  continue;
462  }
463 
464  // ListUnitFiles returns full path names, we just want base name
465  basename = strrchr(value.str, '/');
466  if (basename) {
467  basename = basename + 1;
468  } else {
469  basename = value.str;
470  }
471 
472  if (!strcmp(match, ".service")) {
473  // Service is the "default" unit type, so strip it
474  unit_name = strndup(basename, match - basename);
475  } else {
476  unit_name = strdup(basename);
477  }
478 
479  nfiles++;
480  units = g_list_prepend(units, unit_name);
481  }
482 
483  dbus_message_unref(reply);
484 
485  crm_trace("Found %d manageable systemd unit files", nfiles);
486  units = g_list_sort(units, sort_str);
487  return units;
488 }
489 
490 gboolean
492 {
493  char *unit = NULL;
494 
495  /* Note: Makes a blocking dbus calls
496  * Used by resources_find_service_class() when resource class=service
497  */
498  unit = systemd_unit_by_name(name, NULL);
499  if(unit) {
500  free(unit);
501  return TRUE;
502  }
503  return FALSE;
504 }
505 
506 static char *
507 systemd_unit_metadata(const char *name, int timeout)
508 {
509  char *meta = NULL;
510  char *desc = NULL;
511  char *path = systemd_unit_by_name(name, NULL);
512 
513  if (path) {
514  /* TODO: Worth a making blocking call for? Probably not. Possibly if cached. */
515  desc = systemd_get_property(path, "Description", NULL, NULL, NULL,
516  timeout);
517  } else {
518  desc = crm_strdup_printf("Systemd unit file for %s", name);
519  }
520 
521  meta = crm_strdup_printf("<?xml version=\"1.0\"?>\n"
522  "<!DOCTYPE resource-agent SYSTEM \"ra-api-1.dtd\">\n"
523  "<resource-agent name=\"%s\" version=\"" PCMK_DEFAULT_AGENT_VERSION "\">\n"
524  " <version>1.0</version>\n"
525  " <longdesc lang=\"en\">\n"
526  " %s\n"
527  " </longdesc>\n"
528  " <shortdesc lang=\"en\">systemd unit file for %s</shortdesc>\n"
529  " <parameters>\n"
530  " </parameters>\n"
531  " <actions>\n"
532  " <action name=\"start\" timeout=\"100\" />\n"
533  " <action name=\"stop\" timeout=\"100\" />\n"
534  " <action name=\"status\" timeout=\"100\" />\n"
535  " <action name=\"monitor\" timeout=\"100\" interval=\"60\"/>\n"
536  " <action name=\"meta-data\" timeout=\"5\" />\n"
537  " </actions>\n"
538  " <special tag=\"systemd\">\n"
539  " </special>\n" "</resource-agent>\n", name, desc, name);
540  free(desc);
541  free(path);
542  return meta;
543 }
544 
545 static void
546 systemd_exec_result(DBusMessage *reply, svc_action_t *op)
547 {
548  DBusError error;
549 
550  if (pcmk_dbus_find_error((void*)&error, reply, &error)) {
551 
552  /* ignore "already started" or "not running" errors */
553  if (!systemd_mask_error(op, error.name)) {
554  crm_err("Could not issue %s for %s: %s", op->action, op->rsc, error.message);
555  }
556  dbus_error_free(&error);
557 
558  } else {
559  if(!pcmk_dbus_type_check(reply, NULL, DBUS_TYPE_OBJECT_PATH, __func__, __LINE__)) {
560  crm_warn("Call to %s passed but return type was unexpected", op->action);
561  op->rc = PCMK_OCF_OK;
562 
563  } else {
564  const char *path = NULL;
565 
566  dbus_message_get_args (reply, NULL,
567  DBUS_TYPE_OBJECT_PATH, &path,
568  DBUS_TYPE_INVALID);
569  crm_info("Call to %s passed: %s", op->action, path);
570  op->rc = PCMK_OCF_OK;
571  }
572  }
573 
574  operation_finalize(op);
575 }
576 
577 static void
578 systemd_async_dispatch(DBusPendingCall *pending, void *user_data)
579 {
580  DBusMessage *reply = NULL;
581  svc_action_t *op = user_data;
582 
583  if(pending) {
584  reply = dbus_pending_call_steal_reply(pending);
585  }
586 
587  crm_trace("Got result: %p for %p for %s, %s", reply, pending, op->rsc, op->action);
588 
589  CRM_LOG_ASSERT(pending == op->opaque->pending);
590  services_set_op_pending(op, NULL);
591  systemd_exec_result(reply, op);
592 
593  if(reply) {
594  dbus_message_unref(reply);
595  }
596 }
597 
598 #define SYSTEMD_OVERRIDE_ROOT "/run/systemd/system/"
599 
600 /* When the cluster manages a systemd resource, we create a unit file override
601  * to order the service "before" pacemaker. The "before" relationship won't
602  * actually be used, since systemd won't ever start the resource -- we're
603  * interested in the reverse shutdown ordering it creates, to ensure that
604  * systemd doesn't stop the resource at shutdown while pacemaker is still
605  * running.
606  *
607  * @TODO Add start timeout
608  */
609 #define SYSTEMD_OVERRIDE_TEMPLATE \
610  "[Unit]\n" \
611  "Description=Cluster Controlled %s\n" \
612  "Before=pacemaker.service pacemaker_remote.service\n" \
613  "\n" \
614  "[Service]\n" \
615  "Restart=no\n"
616 
617 // Temporarily use rwxr-xr-x umask when opening a file for writing
618 static FILE *
619 create_world_readable(const char *filename)
620 {
621  mode_t orig_umask = umask(S_IWGRP | S_IWOTH);
622  FILE *fp = fopen(filename, "w");
623 
624  umask(orig_umask);
625  return fp;
626 }
627 
628 static void
629 create_override_dir(const char *agent)
630 {
631  char *override_dir = crm_strdup_printf(SYSTEMD_OVERRIDE_ROOT
632  "/%s.service.d", agent);
633  int rc = pcmk__build_path(override_dir, 0755);
634 
635  if (rc != pcmk_rc_ok) {
636  crm_warn("Could not create systemd override directory %s: %s",
637  override_dir, pcmk_rc_str(rc));
638  }
639  free(override_dir);
640 }
641 
642 static char *
643 get_override_filename(const char *agent)
644 {
646  "/%s.service.d/50-pacemaker.conf", agent);
647 }
648 
649 static void
650 systemd_create_override(const char *agent, int timeout)
651 {
652  FILE *file_strm = NULL;
653  char *override_file = get_override_filename(agent);
654 
655  create_override_dir(agent);
656 
657  /* Ensure the override file is world-readable. This is not strictly
658  * necessary, but it avoids a systemd warning in the logs.
659  */
660  file_strm = create_world_readable(override_file);
661  if (file_strm == NULL) {
662  crm_err("Cannot open systemd override file %s for writing",
663  override_file);
664  } else {
665  char *override = crm_strdup_printf(SYSTEMD_OVERRIDE_TEMPLATE, agent);
666 
667  int rc = fprintf(file_strm, "%s\n", override);
668 
669  free(override);
670  if (rc < 0) {
671  crm_perror(LOG_WARNING, "Cannot write to systemd override file %s",
672  override_file);
673  }
674  fflush(file_strm);
675  fclose(file_strm);
676  systemd_daemon_reload(timeout);
677  }
678 
679  free(override_file);
680 }
681 
682 static void
683 systemd_remove_override(const char *agent, int timeout)
684 {
685  char *override_file = get_override_filename(agent);
686  int rc = unlink(override_file);
687 
688  if (rc < 0) {
689  // Stop may be called when already stopped, which is fine
690  crm_perror(LOG_DEBUG, "Cannot remove systemd override file %s",
691  override_file);
692  } else {
693  systemd_daemon_reload(timeout);
694  }
695  free(override_file);
696 }
697 
698 static void
699 systemd_unit_check(const char *name, const char *state, void *userdata)
700 {
701  svc_action_t * op = userdata;
702 
703  crm_trace("Resource %s has %s='%s'", op->rsc, name, state);
704 
705  if(state == NULL) {
706  op->rc = PCMK_OCF_NOT_RUNNING;
707 
708  } else if (g_strcmp0(state, "active") == 0) {
709  op->rc = PCMK_OCF_OK;
710  } else if (g_strcmp0(state, "reloading") == 0) {
711  op->rc = PCMK_OCF_OK;
712  } else if (g_strcmp0(state, "activating") == 0) {
713  op->rc = PCMK_OCF_PENDING;
714  } else if (g_strcmp0(state, "deactivating") == 0) {
715  op->rc = PCMK_OCF_PENDING;
716  } else {
717  op->rc = PCMK_OCF_NOT_RUNNING;
718  }
719 
720  if (op->synchronous == FALSE) {
721  services_set_op_pending(op, NULL);
722  operation_finalize(op);
723  }
724 }
725 
726 gboolean
728 {
729  const char *method = op->action;
730  DBusMessage *msg = NULL;
731  DBusMessage *reply = NULL;
732 
733  CRM_ASSERT(unit);
734 
735  if (pcmk__str_eq(op->action, "monitor", pcmk__str_casei) || pcmk__str_eq(method, "status", pcmk__str_casei)) {
736  DBusPendingCall *pending = NULL;
737  char *state;
738 
739  state = systemd_get_property(unit, "ActiveState",
740  (op->synchronous? NULL : systemd_unit_check),
741  op, (op->synchronous? NULL : &pending),
742  op->timeout);
743  if (op->synchronous) {
744  systemd_unit_check("ActiveState", state, op);
745  free(state);
746  return op->rc == PCMK_OCF_OK;
747  } else if (pending) {
748  services_set_op_pending(op, pending);
749  return TRUE;
750 
751  } else {
752  return operation_finalize(op);
753  }
754 
755  } else if (g_strcmp0(method, "start") == 0) {
756  method = "StartUnit";
757  systemd_create_override(op->agent, op->timeout);
758 
759  } else if (g_strcmp0(method, "stop") == 0) {
760  method = "StopUnit";
761  systemd_remove_override(op->agent, op->timeout);
762 
763  } else if (g_strcmp0(method, "restart") == 0) {
764  method = "RestartUnit";
765 
766  } else {
768  goto cleanup;
769  }
770 
771  crm_debug("Calling %s for %s: %s", method, op->rsc, unit);
772 
773  msg = systemd_new_method(method);
774  CRM_ASSERT(msg != NULL);
775 
776  /* (ss) */
777  {
778  const char *replace_s = "replace";
779  char *name = systemd_service_name(op->agent);
780 
781  CRM_LOG_ASSERT(dbus_message_append_args(msg, DBUS_TYPE_STRING, &name, DBUS_TYPE_INVALID));
782  CRM_LOG_ASSERT(dbus_message_append_args(msg, DBUS_TYPE_STRING, &replace_s, DBUS_TYPE_INVALID));
783 
784  free(name);
785  }
786 
787  if (op->synchronous == FALSE) {
788  DBusPendingCall *pending = systemd_send(msg, systemd_async_dispatch,
789  op, op->timeout);
790 
791  dbus_message_unref(msg);
792  if(pending) {
793  services_set_op_pending(op, pending);
794  return TRUE;
795 
796  } else {
797  return operation_finalize(op);
798  }
799 
800  } else {
801  reply = systemd_send_recv(msg, NULL, op->timeout);
802  dbus_message_unref(msg);
803  systemd_exec_result(reply, op);
804 
805  if(reply) {
806  dbus_message_unref(reply);
807  }
808  return FALSE;
809  }
810 
811  cleanup:
812  if (op->synchronous == FALSE) {
813  return operation_finalize(op);
814  }
815 
816  return op->rc == PCMK_OCF_OK;
817 }
818 
819 static gboolean
820 systemd_timeout_callback(gpointer p)
821 {
822  svc_action_t * op = p;
823 
824  op->opaque->timerid = 0;
825  crm_warn("%s operation on systemd unit %s named '%s' timed out", op->action, op->agent, op->rsc);
826  operation_finalize(op);
827 
828  return FALSE;
829 }
830 
831 /* For an asynchronous 'op', returns FALSE if 'op' should be free'd by the caller */
832 /* For a synchronous 'op', returns FALSE if 'op' fails */
833 gboolean
835 {
836  char *unit = NULL;
837 
838  CRM_ASSERT(op);
839  CRM_ASSERT(systemd_init());
841  crm_debug("Performing %ssynchronous %s op on systemd unit %s named '%s'",
842  op->synchronous ? "" : "a", op->action, op->agent, op->rsc);
843 
844  if (pcmk__str_eq(op->action, "meta-data", pcmk__str_casei)) {
845  // @TODO Implement an async meta-data call in executor API
846  op->stdout_data = systemd_unit_metadata(op->agent, op->timeout);
847  op->rc = PCMK_OCF_OK;
848 
849  if (op->synchronous == FALSE) {
850  return operation_finalize(op);
851  }
852  return TRUE;
853  }
854 
855  unit = systemd_unit_by_name(op->agent, op);
856  free(unit);
857 
858  if (op->synchronous == FALSE) {
859  if (op->opaque->pending) {
860  op->opaque->timerid = g_timeout_add(op->timeout + 5000, systemd_timeout_callback, op);
862  return TRUE;
863 
864  } else {
865  return operation_finalize(op);
866  }
867  }
868 
869  return op->rc == PCMK_OCF_OK;
870 }
Services API.
#define CRM_CHECK(expr, failure_action)
Definition: logging.h:218
A dumping ground.
char * id
Definition: services.h:120
void pcmk_dbus_disconnect(DBusConnection *connection)
Definition: dbus.c:295
#define DBUS_TIMEOUT_USE_DEFAULT
Definition: pcmk-dbus.h:16
char * rsc
Definition: services.h:121
#define CRM_LOG_ASSERT(expr)
Definition: logging.h:202
const char * pcmk_rc_str(int rc)
Get a user-friendly description of a return code.
Definition: results.c:420
Wrappers for and extensions to glib mainloop.
bool pcmk_dbus_find_error(DBusPendingCall *pending, DBusMessage *reply, DBusError *ret)
Definition: dbus.c:330
char * strndup(const char *str, size_t len)
#define crm_warn(fmt, args...)
Definition: logging.h:351
int rc
Definition: pcmk_fence.c:35
svc_action_private_t * opaque
Definition: services.h:155
#define crm_debug(fmt, args...)
Definition: logging.h:355
#define BUS_NAME_UNIT
Definition: systemd.c:26
gboolean operation_finalize(svc_action_t *op)
char * stdout_data
Definition: services.h:145
gboolean systemd_unit_exists(const char *name)
Definition: systemd.c:491
#define crm_trace(fmt, args...)
Definition: logging.h:356
#define BUS_NAME
Definition: systemd.c:24
char * crm_strdup_printf(char const *format,...) G_GNUC_PRINTF(1
char * agent
Definition: services.h:127
int synchronous
Definition: services.h:141
#define BUS_PATH
Definition: systemd.c:27
#define SYSTEMD_OVERRIDE_ROOT
Definition: systemd.c:598
GList * systemd_unit_listall(void)
Definition: systemd.c:394
DBusPendingCall * pcmk_dbus_send(DBusMessage *msg, DBusConnection *connection, void(*done)(DBusPendingCall *pending, void *user_data), void *user_data, int timeout)
Definition: dbus.c:476
DBusConnection * pcmk_dbus_connect(void)
Definition: dbus.c:259
void services_add_inflight_op(svc_action_t *op)
Definition: services.c:749
void systemd_cleanup(void)
Definition: systemd.c:137
char * action
Definition: services.h:122
#define crm_perror(level, fmt, args...)
Send a system error message to both the log and stderr.
Definition: logging.h:301
#define crm_err(fmt, args...)
Definition: logging.h:350
#define CRM_ASSERT(expr)
Definition: results.h:42
#define PCMK_DEFAULT_AGENT_VERSION
Definition: services.h:58
bool pcmk_dbus_type_check(DBusMessage *msg, DBusMessageIter *field, int expected, const char *function, int line)
Definition: dbus.c:516
gboolean systemd_unit_exec_with_unit(svc_action_t *op, const char *unit)
Definition: systemd.c:727
char * pcmk_dbus_get_property(DBusConnection *connection, const char *target, const char *obj, const gchar *iface, const char *name, property_callback_func callback, void *userdata, DBusPendingCall **pending, int timeout)
Definition: dbus.c:693
#define SYSTEMD_OVERRIDE_TEMPLATE
Definition: systemd.c:609
char * name
Definition: pcmk_fence.c:31
unsigned int timeout
Definition: pcmk_fence.c:32
DBusMessage * pcmk_dbus_send_recv(DBusMessage *msg, DBusConnection *connection, DBusError *error, int timeout)
Definition: dbus.c:412
gboolean systemd_unit_exec(svc_action_t *op)
Definition: systemd.c:834
#define crm_info(fmt, args...)
Definition: logging.h:353
#define BUS_NAME_MANAGER
Definition: systemd.c:25
int pcmk__build_path(const char *path_c, mode_t mode)
Definition: io.c:45