pacemaker  2.1.4-dc6eb4362
Scalable High-Availability cluster resource manager
ipc_server.c
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1 /*
2  * Copyright 2004-2022 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 
12 #include <stdio.h>
13 #include <errno.h>
14 #include <bzlib.h>
15 #include <sys/stat.h>
16 #include <sys/types.h>
17 
18 #include <crm/crm.h>
19 #include <crm/msg_xml.h>
20 #include <crm/common/ipc.h>
22 #include "crmcommon_private.h"
23 
24 /* Evict clients whose event queue grows this large (by default) */
25 #define PCMK_IPC_DEFAULT_QUEUE_MAX 500
26 
27 static GHashTable *client_connections = NULL;
28 
35 guint
37 {
38  return client_connections? g_hash_table_size(client_connections) : 0;
39 }
40 
50 void
51 pcmk__foreach_ipc_client(GHFunc func, gpointer user_data)
52 {
53  if ((func != NULL) && (client_connections != NULL)) {
54  g_hash_table_foreach(client_connections, func, user_data);
55  }
56 }
57 
59 pcmk__find_client(qb_ipcs_connection_t *c)
60 {
61  if (client_connections) {
62  return g_hash_table_lookup(client_connections, c);
63  }
64 
65  crm_trace("No client found for %p", c);
66  return NULL;
67 }
68 
70 pcmk__find_client_by_id(const char *id)
71 {
72  gpointer key;
73  pcmk__client_t *client;
74  GHashTableIter iter;
75 
76  if (client_connections && id) {
77  g_hash_table_iter_init(&iter, client_connections);
78  while (g_hash_table_iter_next(&iter, &key, (gpointer *) & client)) {
79  if (strcmp(client->id, id) == 0) {
80  return client;
81  }
82  }
83  }
84 
85  crm_trace("No client found with id=%s", id);
86  return NULL;
87 }
88 
98 const char *
100 {
101  if (c == NULL) {
102  return "(unspecified)";
103 
104  } else if (c->name != NULL) {
105  return c->name;
106 
107  } else if (c->id != NULL) {
108  return c->id;
109 
110  } else {
111  return "(unidentified)";
112  }
113 }
114 
115 void
117 {
118  if (client_connections != NULL) {
119  int active = g_hash_table_size(client_connections);
120 
121  if (active) {
122  crm_err("Exiting with %d active IPC client%s",
123  active, pcmk__plural_s(active));
124  }
125  g_hash_table_destroy(client_connections); client_connections = NULL;
126  }
127 }
128 
129 void
130 pcmk__drop_all_clients(qb_ipcs_service_t *service)
131 {
132  qb_ipcs_connection_t *c = NULL;
133 
134  if (service == NULL) {
135  return;
136  }
137 
138  c = qb_ipcs_connection_first_get(service);
139 
140  while (c != NULL) {
141  qb_ipcs_connection_t *last = c;
142 
143  c = qb_ipcs_connection_next_get(service, last);
144 
145  /* There really shouldn't be anyone connected at this point */
146  crm_notice("Disconnecting client %p, pid=%d...",
147  last, pcmk__client_pid(last));
148  qb_ipcs_disconnect(last);
149  qb_ipcs_connection_unref(last);
150  }
151 }
152 
163 static pcmk__client_t *
164 client_from_connection(qb_ipcs_connection_t *c, void *key, uid_t uid_client)
165 {
166  pcmk__client_t *client = calloc(1, sizeof(pcmk__client_t));
167 
168  if (client == NULL) {
169  crm_perror(LOG_ERR, "Allocating client");
170  return NULL;
171  }
172 
173  if (c) {
174  client->user = pcmk__uid2username(uid_client);
175  if (client->user == NULL) {
176  client->user = strdup("#unprivileged");
177  CRM_CHECK(client->user != NULL, free(client); return NULL);
178  crm_err("Unable to enforce ACLs for user ID %d, assuming unprivileged",
179  uid_client);
180  }
181  client->ipcs = c;
183  client->pid = pcmk__client_pid(c);
184  if (key == NULL) {
185  key = c;
186  }
187  }
188 
189  client->id = crm_generate_uuid();
190  if (client->id == NULL) {
191  crm_err("Could not generate UUID for client");
192  free(client->user);
193  free(client);
194  return NULL;
195  }
196  if (key == NULL) {
197  key = client->id;
198  }
199  if (client_connections == NULL) {
200  crm_trace("Creating IPC client table");
201  client_connections = g_hash_table_new(g_direct_hash, g_direct_equal);
202  }
203  g_hash_table_insert(client_connections, key, client);
204  return client;
205 }
206 
216 {
217  pcmk__client_t *client = client_from_connection(NULL, key, 0);
218 
219  CRM_ASSERT(client != NULL);
220  return client;
221 }
222 
224 pcmk__new_client(qb_ipcs_connection_t *c, uid_t uid_client, gid_t gid_client)
225 {
226  gid_t uid_cluster = 0;
227  gid_t gid_cluster = 0;
228 
229  pcmk__client_t *client = NULL;
230 
231  CRM_CHECK(c != NULL, return NULL);
232 
233  if (pcmk_daemon_user(&uid_cluster, &gid_cluster) < 0) {
234  static bool need_log = TRUE;
235 
236  if (need_log) {
237  crm_warn("Could not find user and group IDs for user %s",
239  need_log = FALSE;
240  }
241  }
242 
243  if (uid_client != 0) {
244  crm_trace("Giving group %u access to new IPC connection", gid_cluster);
245  /* Passing -1 to chown(2) means don't change */
246  qb_ipcs_connection_auth_set(c, -1, gid_cluster, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
247  }
248 
249  /* TODO: Do our own auth checking, return NULL if unauthorized */
250  client = client_from_connection(c, NULL, uid_client);
251  if (client == NULL) {
252  return NULL;
253  }
254 
255  if ((uid_client == 0) || (uid_client == uid_cluster)) {
256  /* Remember when a connection came from root or hacluster */
258  }
259 
260  crm_debug("New IPC client %s for PID %u with uid %d and gid %d",
261  client->id, client->pid, uid_client, gid_client);
262  return client;
263 }
264 
265 static struct iovec *
266 pcmk__new_ipc_event(void)
267 {
268  struct iovec *iov = calloc(2, sizeof(struct iovec));
269 
270  CRM_ASSERT(iov != NULL);
271  return iov;
272 }
273 
279 void
280 pcmk_free_ipc_event(struct iovec *event)
281 {
282  if (event != NULL) {
283  free(event[0].iov_base);
284  free(event[1].iov_base);
285  free(event);
286  }
287 }
288 
289 static void
290 free_event(gpointer data)
291 {
292  pcmk_free_ipc_event((struct iovec *) data);
293 }
294 
295 static void
296 add_event(pcmk__client_t *c, struct iovec *iov)
297 {
298  if (c->event_queue == NULL) {
299  c->event_queue = g_queue_new();
300  }
301  g_queue_push_tail(c->event_queue, iov);
302 }
303 
304 void
306 {
307  if (c == NULL) {
308  return;
309  }
310 
311  if (client_connections) {
312  if (c->ipcs) {
313  crm_trace("Destroying %p/%p (%d remaining)",
314  c, c->ipcs, g_hash_table_size(client_connections) - 1);
315  g_hash_table_remove(client_connections, c->ipcs);
316 
317  } else {
318  crm_trace("Destroying remote connection %p (%d remaining)",
319  c, g_hash_table_size(client_connections) - 1);
320  g_hash_table_remove(client_connections, c->id);
321  }
322  }
323 
324  if (c->event_timer) {
325  g_source_remove(c->event_timer);
326  }
327 
328  if (c->event_queue) {
329  crm_debug("Destroying %d events", g_queue_get_length(c->event_queue));
330  g_queue_free_full(c->event_queue, free_event);
331  }
332 
333  free(c->id);
334  free(c->name);
335  free(c->user);
336  if (c->remote) {
337  if (c->remote->auth_timeout) {
338  g_source_remove(c->remote->auth_timeout);
339  }
340  free(c->remote->buffer);
341  free(c->remote);
342  }
343  free(c);
344 }
345 
355 bool
356 pcmk__set_client_queue_max(pcmk__client_t *client, const char *qmax)
357 {
358  if (pcmk_is_set(client->flags, pcmk__client_privileged)) {
359  long long qmax_ll;
360 
361  if ((pcmk__scan_ll(qmax, &qmax_ll, 0LL) == pcmk_rc_ok)
362  && (qmax_ll > 0LL) && (qmax_ll <= UINT_MAX)) {
363  client->queue_max = (unsigned int) qmax_ll;
364  return true;
365  }
366  }
367  return false;
368 }
369 
370 int
371 pcmk__client_pid(qb_ipcs_connection_t *c)
372 {
373  struct qb_ipcs_connection_stats stats;
374 
375  stats.client_pid = 0;
376  qb_ipcs_connection_stats_get(c, &stats, 0);
377  return stats.client_pid;
378 }
379 
391 xmlNode *
392 pcmk__client_data2xml(pcmk__client_t *c, void *data, uint32_t *id,
393  uint32_t *flags)
394 {
395  xmlNode *xml = NULL;
396  char *uncompressed = NULL;
397  char *text = ((char *)data) + sizeof(pcmk__ipc_header_t);
398  pcmk__ipc_header_t *header = data;
399 
400  if (!pcmk__valid_ipc_header(header)) {
401  return NULL;
402  }
403 
404  if (id) {
405  *id = ((struct qb_ipc_response_header *)data)->id;
406  }
407  if (flags) {
408  *flags = header->flags;
409  }
410 
411  if (pcmk_is_set(header->flags, crm_ipc_proxied)) {
412  /* Mark this client as being the endpoint of a proxy connection.
413  * Proxy connections responses are sent on the event channel, to avoid
414  * blocking the controller serving as proxy.
415  */
417  }
418 
419  if (header->size_compressed) {
420  int rc = 0;
421  unsigned int size_u = 1 + header->size_uncompressed;
422  uncompressed = calloc(1, size_u);
423 
424  crm_trace("Decompressing message data %u bytes into %u bytes",
425  header->size_compressed, size_u);
426 
427  rc = BZ2_bzBuffToBuffDecompress(uncompressed, &size_u, text, header->size_compressed, 1, 0);
428  text = uncompressed;
429 
430  if (rc != BZ_OK) {
431  crm_err("Decompression failed: %s " CRM_XS " bzerror=%d",
432  bz2_strerror(rc), rc);
433  free(uncompressed);
434  return NULL;
435  }
436  }
437 
438  CRM_ASSERT(text[header->size_uncompressed - 1] == 0);
439 
440  xml = string2xml(text);
441  crm_log_xml_trace(xml, "[IPC received]");
442 
443  free(uncompressed);
444  return xml;
445 }
446 
447 static int crm_ipcs_flush_events(pcmk__client_t *c);
448 
449 static gboolean
450 crm_ipcs_flush_events_cb(gpointer data)
451 {
452  pcmk__client_t *c = data;
453 
454  c->event_timer = 0;
455  crm_ipcs_flush_events(c);
456  return FALSE;
457 }
458 
466 static inline void
467 delay_next_flush(pcmk__client_t *c, unsigned int queue_len)
468 {
469  /* Delay a maximum of 1.5 seconds */
470  guint delay = (queue_len < 5)? (1000 + 100 * queue_len) : 1500;
471 
472  c->event_timer = g_timeout_add(delay, crm_ipcs_flush_events_cb, c);
473 }
474 
483 static int
484 crm_ipcs_flush_events(pcmk__client_t *c)
485 {
486  int rc = pcmk_rc_ok;
487  ssize_t qb_rc = 0;
488  unsigned int sent = 0;
489  unsigned int queue_len = 0;
490 
491  if (c == NULL) {
492  return rc;
493 
494  } else if (c->event_timer) {
495  /* There is already a timer, wait until it goes off */
496  crm_trace("Timer active for %p - %d", c->ipcs, c->event_timer);
497  return rc;
498  }
499 
500  if (c->event_queue) {
501  queue_len = g_queue_get_length(c->event_queue);
502  }
503  while (sent < 100) {
504  pcmk__ipc_header_t *header = NULL;
505  struct iovec *event = NULL;
506 
507  if (c->event_queue) {
508  // We don't pop unless send is successful
509  event = g_queue_peek_head(c->event_queue);
510  }
511  if (event == NULL) { // Queue is empty
512  break;
513  }
514 
515  qb_rc = qb_ipcs_event_sendv(c->ipcs, event, 2);
516  if (qb_rc < 0) {
517  rc = (int) -qb_rc;
518  break;
519  }
520  event = g_queue_pop_head(c->event_queue);
521 
522  sent++;
523  header = event[0].iov_base;
524  if (header->size_compressed) {
525  crm_trace("Event %d to %p[%d] (%lld compressed bytes) sent",
526  header->qb.id, c->ipcs, c->pid, (long long) qb_rc);
527  } else {
528  crm_trace("Event %d to %p[%d] (%lld bytes) sent: %.120s",
529  header->qb.id, c->ipcs, c->pid, (long long) qb_rc,
530  (char *) (event[1].iov_base));
531  }
532  pcmk_free_ipc_event(event);
533  }
534 
535  queue_len -= sent;
536  if (sent > 0 || queue_len) {
537  crm_trace("Sent %d events (%d remaining) for %p[%d]: %s (%lld)",
538  sent, queue_len, c->ipcs, c->pid,
539  pcmk_rc_str(rc), (long long) qb_rc);
540  }
541 
542  if (queue_len) {
543 
544  /* Allow clients to briefly fall behind on processing incoming messages,
545  * but drop completely unresponsive clients so the connection doesn't
546  * consume resources indefinitely.
547  */
548  if (queue_len > QB_MAX(c->queue_max, PCMK_IPC_DEFAULT_QUEUE_MAX)) {
549  if ((c->queue_backlog <= 1) || (queue_len < c->queue_backlog)) {
550  /* Don't evict for a new or shrinking backlog */
551  crm_warn("Client with process ID %u has a backlog of %u messages "
552  CRM_XS " %p", c->pid, queue_len, c->ipcs);
553  } else {
554  crm_err("Evicting client with process ID %u due to backlog of %u messages "
555  CRM_XS " %p", c->pid, queue_len, c->ipcs);
556  c->queue_backlog = 0;
557  qb_ipcs_disconnect(c->ipcs);
558  return rc;
559  }
560  }
561 
562  c->queue_backlog = queue_len;
563  delay_next_flush(c, queue_len);
564 
565  } else {
566  /* Event queue is empty, there is no backlog */
567  c->queue_backlog = 0;
568  }
569 
570  return rc;
571 }
572 
585 int
586 pcmk__ipc_prepare_iov(uint32_t request, xmlNode *message,
587  uint32_t max_send_size, struct iovec **result,
588  ssize_t *bytes)
589 {
590  static unsigned int biggest = 0;
591  struct iovec *iov;
592  unsigned int total = 0;
593  char *compressed = NULL;
594  char *buffer = NULL;
595  pcmk__ipc_header_t *header = NULL;
596 
597  if ((message == NULL) || (result == NULL)) {
598  return EINVAL;
599  }
600 
601  header = calloc(1, sizeof(pcmk__ipc_header_t));
602  if (header == NULL) {
603  return ENOMEM; /* errno mightn't be set by allocator */
604  }
605 
606  buffer = dump_xml_unformatted(message);
607 
608  if (max_send_size == 0) {
609  max_send_size = crm_ipc_default_buffer_size();
610  }
611  CRM_LOG_ASSERT(max_send_size != 0);
612 
613  *result = NULL;
614  iov = pcmk__new_ipc_event();
615  iov[0].iov_len = sizeof(pcmk__ipc_header_t);
616  iov[0].iov_base = header;
617 
618  header->version = PCMK__IPC_VERSION;
619  header->size_uncompressed = 1 + strlen(buffer);
620  total = iov[0].iov_len + header->size_uncompressed;
621 
622  if (total < max_send_size) {
623  iov[1].iov_base = buffer;
624  iov[1].iov_len = header->size_uncompressed;
625 
626  } else {
627  unsigned int new_size = 0;
628 
629  if (pcmk__compress(buffer, (unsigned int) header->size_uncompressed,
630  (unsigned int) max_send_size, &compressed,
631  &new_size) == pcmk_rc_ok) {
632 
633  pcmk__set_ipc_flags(header->flags, "send data", crm_ipc_compressed);
634  header->size_compressed = new_size;
635 
636  iov[1].iov_len = header->size_compressed;
637  iov[1].iov_base = compressed;
638 
639  free(buffer);
640 
641  biggest = QB_MAX(header->size_compressed, biggest);
642 
643  } else {
644  crm_log_xml_trace(message, "EMSGSIZE");
645  biggest = QB_MAX(header->size_uncompressed, biggest);
646 
647  crm_err("Could not compress %u-byte message into less than IPC "
648  "limit of %u bytes; set PCMK_ipc_buffer to higher value "
649  "(%u bytes suggested)",
650  header->size_uncompressed, max_send_size, 4 * biggest);
651 
652  free(compressed);
653  free(buffer);
654  pcmk_free_ipc_event(iov);
655  return EMSGSIZE;
656  }
657  }
658 
659  header->qb.size = iov[0].iov_len + iov[1].iov_len;
660  header->qb.id = (int32_t)request; /* Replying to a specific request */
661 
662  *result = iov;
663  CRM_ASSERT(header->qb.size > 0);
664  if (bytes != NULL) {
665  *bytes = header->qb.size;
666  }
667  return pcmk_rc_ok;
668 }
669 
670 int
671 pcmk__ipc_send_iov(pcmk__client_t *c, struct iovec *iov, uint32_t flags)
672 {
673  int rc = pcmk_rc_ok;
674  static uint32_t id = 1;
675  pcmk__ipc_header_t *header = iov[0].iov_base;
676 
677  if (c->flags & pcmk__client_proxied) {
678  /* _ALL_ replies to proxied connections need to be sent as events */
680  /* The proxied flag lets us know this was originally meant to be a
681  * response, even though we're sending it over the event channel.
682  */
683  pcmk__set_ipc_flags(flags, "server event",
686  }
687  }
688 
689  pcmk__set_ipc_flags(header->flags, "server event", flags);
690  if (flags & crm_ipc_server_event) {
691  header->qb.id = id++; /* We don't really use it, but doesn't hurt to set one */
692 
693  if (flags & crm_ipc_server_free) {
694  crm_trace("Sending the original to %p[%d]", c->ipcs, c->pid);
695  add_event(c, iov);
696 
697  } else {
698  struct iovec *iov_copy = pcmk__new_ipc_event();
699 
700  crm_trace("Sending a copy to %p[%d]", c->ipcs, c->pid);
701  iov_copy[0].iov_len = iov[0].iov_len;
702  iov_copy[0].iov_base = malloc(iov[0].iov_len);
703  memcpy(iov_copy[0].iov_base, iov[0].iov_base, iov[0].iov_len);
704 
705  iov_copy[1].iov_len = iov[1].iov_len;
706  iov_copy[1].iov_base = malloc(iov[1].iov_len);
707  memcpy(iov_copy[1].iov_base, iov[1].iov_base, iov[1].iov_len);
708 
709  add_event(c, iov_copy);
710  }
711 
712  } else {
713  ssize_t qb_rc;
714 
715  CRM_LOG_ASSERT(header->qb.id != 0); /* Replying to a specific request */
716 
717  qb_rc = qb_ipcs_response_sendv(c->ipcs, iov, 2);
718  if (qb_rc < header->qb.size) {
719  if (qb_rc < 0) {
720  rc = (int) -qb_rc;
721  }
722  crm_notice("Response %d to pid %d failed: %s "
723  CRM_XS " bytes=%u rc=%lld ipcs=%p",
724  header->qb.id, c->pid, pcmk_rc_str(rc),
725  header->qb.size, (long long) qb_rc, c->ipcs);
726 
727  } else {
728  crm_trace("Response %d sent, %lld bytes to %p[%d]",
729  header->qb.id, (long long) qb_rc, c->ipcs, c->pid);
730  }
731 
732  if (flags & crm_ipc_server_free) {
733  pcmk_free_ipc_event(iov);
734  }
735  }
736 
737  if (flags & crm_ipc_server_event) {
738  rc = crm_ipcs_flush_events(c);
739  } else {
740  crm_ipcs_flush_events(c);
741  }
742 
743  if ((rc == EPIPE) || (rc == ENOTCONN)) {
744  crm_trace("Client %p disconnected", c->ipcs);
745  }
746  return rc;
747 }
748 
749 int
750 pcmk__ipc_send_xml(pcmk__client_t *c, uint32_t request, xmlNode *message,
751  uint32_t flags)
752 {
753  struct iovec *iov = NULL;
754  int rc = pcmk_rc_ok;
755 
756  if (c == NULL) {
757  return EINVAL;
758  }
759  rc = pcmk__ipc_prepare_iov(request, message, crm_ipc_default_buffer_size(),
760  &iov, NULL);
761  if (rc == pcmk_rc_ok) {
763  rc = pcmk__ipc_send_iov(c, iov, flags);
764  } else {
765  pcmk_free_ipc_event(iov);
766  crm_notice("IPC message to pid %d failed: %s " CRM_XS " rc=%d",
767  c->pid, pcmk_rc_str(rc), rc);
768  }
769  return rc;
770 }
771 
785 xmlNode *
786 pcmk__ipc_create_ack_as(const char *function, int line, uint32_t flags,
787  const char *tag, crm_exit_t status)
788 {
789  xmlNode *ack = NULL;
790 
792  ack = create_xml_node(NULL, tag);
793  crm_xml_add(ack, "function", function);
794  crm_xml_add_int(ack, "line", line);
795  crm_xml_add_int(ack, "status", (int) status);
796  }
797  return ack;
798 }
799 
814 int
815 pcmk__ipc_send_ack_as(const char *function, int line, pcmk__client_t *c,
816  uint32_t request, uint32_t flags, const char *tag,
817  crm_exit_t status)
818 {
819  int rc = pcmk_rc_ok;
820  xmlNode *ack = pcmk__ipc_create_ack_as(function, line, flags, tag, status);
821 
822  if (ack != NULL) {
823  crm_trace("Ack'ing IPC message from client %s as <%s status=%d>",
824  pcmk__client_name(c), tag, status);
825  c->request_id = 0;
826  rc = pcmk__ipc_send_xml(c, request, ack, flags);
827  free_xml(ack);
828  }
829  return rc;
830 }
831 
844 void pcmk__serve_based_ipc(qb_ipcs_service_t **ipcs_ro,
845  qb_ipcs_service_t **ipcs_rw,
846  qb_ipcs_service_t **ipcs_shm,
847  struct qb_ipcs_service_handlers *ro_cb,
848  struct qb_ipcs_service_handlers *rw_cb)
849 {
851  QB_IPC_NATIVE, ro_cb);
852 
854  QB_IPC_NATIVE, rw_cb);
855 
857  QB_IPC_SHM, rw_cb);
858 
859  if (*ipcs_ro == NULL || *ipcs_rw == NULL || *ipcs_shm == NULL) {
860  crm_err("Failed to create the CIB manager: exiting and inhibiting respawn");
861  crm_warn("Verify pacemaker and pacemaker_remote are not both enabled");
863  }
864 }
865 
877 void
878 pcmk__stop_based_ipc(qb_ipcs_service_t *ipcs_ro,
879  qb_ipcs_service_t *ipcs_rw,
880  qb_ipcs_service_t *ipcs_shm)
881 {
882  qb_ipcs_destroy(ipcs_ro);
883  qb_ipcs_destroy(ipcs_rw);
884  qb_ipcs_destroy(ipcs_shm);
885 }
886 
895 qb_ipcs_service_t *
896 pcmk__serve_controld_ipc(struct qb_ipcs_service_handlers *cb)
897 {
898  return mainloop_add_ipc_server(CRM_SYSTEM_CRMD, QB_IPC_NATIVE, cb);
899 }
900 
909 void
910 pcmk__serve_attrd_ipc(qb_ipcs_service_t **ipcs,
911  struct qb_ipcs_service_handlers *cb)
912 {
913  *ipcs = mainloop_add_ipc_server(T_ATTRD, QB_IPC_NATIVE, cb);
914 
915  if (*ipcs == NULL) {
916  crm_err("Failed to create pacemaker-attrd server: exiting and inhibiting respawn");
917  crm_warn("Verify pacemaker and pacemaker_remote are not both enabled.");
919  }
920 }
921 
930 void
931 pcmk__serve_fenced_ipc(qb_ipcs_service_t **ipcs,
932  struct qb_ipcs_service_handlers *cb)
933 {
934  *ipcs = mainloop_add_ipc_server_with_prio("stonith-ng", QB_IPC_NATIVE, cb,
935  QB_LOOP_HIGH);
936 
937  if (*ipcs == NULL) {
938  crm_err("Failed to create fencer: exiting and inhibiting respawn.");
939  crm_warn("Verify pacemaker and pacemaker_remote are not both enabled.");
941  }
942 }
943 
952 void
953 pcmk__serve_pacemakerd_ipc(qb_ipcs_service_t **ipcs,
954  struct qb_ipcs_service_handlers *cb)
955 {
956  *ipcs = mainloop_add_ipc_server(CRM_SYSTEM_MCP, QB_IPC_NATIVE, cb);
957 
958  if (*ipcs == NULL) {
959  crm_err("Couldn't start pacemakerd IPC server");
960  crm_warn("Verify pacemaker and pacemaker_remote are not both enabled.");
961  /* sub-daemons are observed by pacemakerd. Thus we exit CRM_EX_FATAL
962  * if we want to prevent pacemakerd from restarting them.
963  * With pacemakerd we leave the exit-code shown to e.g. systemd
964  * to what it was prior to moving the code here from pacemakerd.c
965  */
967  }
968 }
969 
978 qb_ipcs_service_t *
979 pcmk__serve_schedulerd_ipc(struct qb_ipcs_service_handlers *cb)
980 {
981  return mainloop_add_ipc_server(CRM_SYSTEM_PENGINE, QB_IPC_NATIVE, cb);
982 }
983 
994 bool
996 {
998  return (!strcmp(name, CRM_SYSTEM_CRMD)
999  || !strcmp(name, CRM_SYSTEM_STONITHD)
1000  || !strcmp(name, "stonith-ng")
1001  || !strcmp(name, "attrd")
1002  || !strcmp(name, CRM_SYSTEM_CIB)
1003  || !strcmp(name, CRM_SYSTEM_MCP)
1004  || !strcmp(name, CRM_SYSTEM_DC)
1005  || !strcmp(name, CRM_SYSTEM_TENGINE)
1006  || !strcmp(name, CRM_SYSTEM_LRMD));
1007 }
#define T_ATTRD
Definition: msg_xml.h:85
#define CRM_CHECK(expr, failure_action)
Definition: logging.h:226
#define PCMK__SERVER_BASED_RW
Definition: crm_internal.h:88
A dumping ground.
void pcmk__drop_all_clients(qb_ipcs_service_t *service)
Definition: ipc_server.c:130
#define crm_notice(fmt, args...)
Definition: logging.h:360
const char * pcmk__client_name(pcmk__client_t *c)
Definition: ipc_server.c:99
const char * bz2_strerror(int rc)
Definition: results.c:742
char data[0]
Definition: cpg.c:55
char * crm_generate_uuid(void)
Definition: utils.c:480
void pcmk__client_cleanup(void)
Definition: ipc_server.c:116
int pcmk__ipc_prepare_iov(uint32_t request, xmlNode *message, uint32_t max_send_size, struct iovec **result, ssize_t *bytes)
Definition: ipc_server.c:586
void pcmk__free_client(pcmk__client_t *c)
Definition: ipc_server.c:305
_Noreturn crm_exit_t crm_exit(crm_exit_t rc)
Definition: results.c:775
pcmk__client_t * pcmk__new_client(qb_ipcs_connection_t *c, uid_t uid_client, gid_t gid_client)
Definition: ipc_server.c:224
bool crm_is_daemon_name(const char *name)
Check whether string represents a client name used by cluster daemons.
Definition: ipc_server.c:995
const char * name
Definition: cib.c:24
qb_ipcs_service_t * mainloop_add_ipc_server_with_prio(const char *name, enum qb_ipc_type type, struct qb_ipcs_service_handlers *callbacks, enum qb_loop_priority prio)
Start server-side API end-point, hooked into the internal event loop.
Definition: mainloop.c:677
xmlNode * pcmk__client_data2xml(pcmk__client_t *c, void *data, uint32_t *id, uint32_t *flags)
Definition: ipc_server.c:392
int pcmk__client_pid(qb_ipcs_connection_t *c)
Definition: ipc_server.c:371
uint64_t flags
Definition: ipc_internal.h:142
const char * crm_xml_add_int(xmlNode *node, const char *name, int value)
Create an XML attribute with specified name and integer value.
Definition: nvpair.c:431
const char * crm_xml_add(xmlNode *node, const char *name, const char *value)
Create an XML attribute with specified name and value.
Definition: nvpair.c:323
void pcmk_free_ipc_event(struct iovec *event)
Free an I/O vector created by pcmk__ipc_prepare_iov()
Definition: ipc_server.c:280
enum crm_exit_e crm_exit_t
#define CRM_LOG_ASSERT(expr)
Definition: logging.h:210
guint pcmk__ipc_client_count()
Definition: ipc_server.c:36
int pcmk_daemon_user(uid_t *uid, gid_t *gid)
Get user and group IDs of pacemaker daemon user.
Definition: utils.c:97
struct pcmk__ipc_header_s pcmk__ipc_header_t
const char * pcmk_rc_str(int rc)
Get a user-friendly description of a return code.
Definition: results.c:370
GQueue * event_queue
Definition: ipc_internal.h:148
void pcmk__foreach_ipc_client(GHFunc func, gpointer user_data)
Definition: ipc_server.c:51
xmlNode * string2xml(const char *input)
Definition: xml.c:869
void pcmk__serve_attrd_ipc(qb_ipcs_service_t **ipcs, struct qb_ipcs_service_handlers *cb)
Definition: ipc_server.c:910
#define CRM_SYSTEM_DC
Definition: crm.h:102
#define CRM_SYSTEM_MCP
Definition: crm.h:111
pcmk__client_t * pcmk__new_unauth_client(void *key)
Allocate a new pcmk__client_t object and generate its ID.
Definition: ipc_server.c:215
struct qb_ipc_response_header qb
#define pcmk__set_client_flags(client, flags_to_set)
Definition: ipc_internal.h:162
void pcmk__serve_fenced_ipc(qb_ipcs_service_t **ipcs, struct qb_ipcs_service_handlers *cb)
Definition: ipc_server.c:931
int pcmk__scan_ll(const char *text, long long *result, long long default_value)
Definition: strings.c:97
#define crm_warn(fmt, args...)
Definition: logging.h:359
pcmk__client_t * pcmk__find_client_by_id(const char *id)
Definition: ipc_server.c:70
#define PCMK__IPC_VERSION
#define crm_debug(fmt, args...)
Definition: logging.h:363
void pcmk__serve_pacemakerd_ipc(qb_ipcs_service_t **ipcs, struct qb_ipcs_service_handlers *cb)
Definition: ipc_server.c:953
External (OS/environmental) problem.
Definition: results.h:258
#define crm_trace(fmt, args...)
Definition: logging.h:364
#define pcmk_is_set(g, f)
Convenience alias for pcmk_all_flags_set(), to check single flag.
Definition: util.h:122
#define CRM_SYSTEM_PENGINE
Definition: crm.h:108
G_GNUC_INTERNAL bool pcmk__valid_ipc_header(const pcmk__ipc_header_t *header)
Definition: ipc_common.c:81
int pcmk__ipc_send_xml(pcmk__client_t *c, uint32_t request, xmlNode *message, uint32_t flags)
Definition: ipc_server.c:750
xmlNode * create_xml_node(xmlNode *parent, const char *name)
Definition: xml.c:696
int pcmk__compress(const char *data, unsigned int length, unsigned int max, char **result, unsigned int *result_len)
Definition: strings.c:749
#define CRM_DAEMON_USER
Definition: config.h:30
unsigned int crm_ipc_default_buffer_size(void)
Return pacemaker&#39;s default IPC buffer size.
Definition: ipc_common.c:62
unsigned int pid
Definition: ipc_internal.h:137
xmlNode * pcmk__ipc_create_ack_as(const char *function, int line, uint32_t flags, const char *tag, crm_exit_t status)
Definition: ipc_server.c:786
void free_xml(xmlNode *child)
Definition: xml.c:824
#define PCMK__SERVER_BASED_RO
Definition: crm_internal.h:87
const char * pcmk__message_name(const char *name)
Get name to be used as identifier for cluster messages.
Definition: messages.c:182
#define CRM_SYSTEM_CRMD
Definition: crm.h:106
#define CRM_XS
Definition: logging.h:55
qb_ipcs_service_t * pcmk__serve_controld_ipc(struct qb_ipcs_service_handlers *cb)
Definition: ipc_server.c:896
int pcmk__ipc_send_iov(pcmk__client_t *c, struct iovec *iov, uint32_t flags)
Definition: ipc_server.c:671
#define CRM_SYSTEM_STONITHD
Definition: crm.h:110
#define CRM_SYSTEM_CIB
Definition: crm.h:105
#define PCMK_IPC_DEFAULT_QUEUE_MAX
Definition: ipc_server.c:25
#define CRM_SYSTEM_TENGINE
Definition: crm.h:109
bool pcmk__set_client_queue_max(pcmk__client_t *client, const char *qmax)
Definition: ipc_server.c:356
pcmk__action_result_t result
Definition: pcmk_fence.c:34
#define crm_perror(level, fmt, args...)
Send a system error message to both the log and stderr.
Definition: logging.h:309
#define pcmk__set_ipc_flags(ipc_flags, ipc_name, flags_to_set)
Definition: ipc_internal.h:176
#define crm_err(fmt, args...)
Definition: logging.h:358
#define CRM_ASSERT(expr)
Definition: results.h:42
void pcmk__serve_based_ipc(qb_ipcs_service_t **ipcs_ro, qb_ipcs_service_t **ipcs_rw, qb_ipcs_service_t **ipcs_shm, struct qb_ipcs_service_handlers *ro_cb, struct qb_ipcs_service_handlers *rw_cb)
Definition: ipc_server.c:844
int delay
Definition: pcmk_fence.c:33
char * dump_xml_unformatted(xmlNode *msg)
Definition: xml.c:2018
#define CRM_SYSTEM_LRMD
Definition: crm.h:107
#define pcmk__plural_s(i)
pcmk__client_t * pcmk__find_client(qb_ipcs_connection_t *c)
Definition: ipc_server.c:59
IPC interface to Pacemaker daemons.
#define crm_log_xml_trace(xml, text)
Definition: logging.h:372
#define PCMK__SERVER_BASED_SHM
Definition: crm_internal.h:89
unsigned int queue_max
Definition: ipc_internal.h:159
struct pcmk__remote_s * remote
Definition: ipc_internal.h:156
char * pcmk__uid2username(uid_t uid)
Definition: acl.c:698
qb_ipcs_service_t * mainloop_add_ipc_server(const char *name, enum qb_ipc_type type, struct qb_ipcs_service_handlers *callbacks)
Definition: mainloop.c:670
void pcmk__stop_based_ipc(qb_ipcs_service_t *ipcs_ro, qb_ipcs_service_t *ipcs_rw, qb_ipcs_service_t *ipcs_shm)
Definition: ipc_server.c:878
unsigned int queue_backlog
Definition: ipc_internal.h:158
Do not respawn.
Definition: results.h:268
qb_ipcs_connection_t * ipcs
Definition: ipc_internal.h:154
qb_ipcs_service_t * pcmk__serve_schedulerd_ipc(struct qb_ipcs_service_handlers *cb)
Definition: ipc_server.c:979
uint64_t flags
Definition: remote.c:149
int pcmk__ipc_send_ack_as(const char *function, int line, pcmk__client_t *c, uint32_t request, uint32_t flags, const char *tag, crm_exit_t status)
Definition: ipc_server.c:815