pacemaker  1.1.16-94ff4df
Scalable High-Availability cluster resource manager
ipc.c
Go to the documentation of this file.
1 /*
2  * Copyright (C) 2004 Andrew Beekhof <andrew@beekhof.net>
3  *
4  * This library is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU Lesser General Public
6  * License as published by the Free Software Foundation; either
7  * version 2.1 of the License, or (at your option) any later version.
8  *
9  * This library 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 GNU
12  * Lesser General Public License for more details.
13  *
14  * You should have received a copy of the GNU Lesser General Public
15  * License along with this library; if not, write to the Free Software
16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17  */
18 
19 #include <crm_internal.h>
20 
21 #include <sys/param.h>
22 
23 #include <stdio.h>
24 #include <sys/types.h>
25 #include <sys/stat.h>
26 #include <unistd.h>
27 #include <grp.h>
28 
29 #include <errno.h>
30 #include <fcntl.h>
31 #include <bzlib.h>
32 
33 #include <crm/crm.h>
34 #include <crm/msg_xml.h>
35 #include <crm/common/ipc.h>
36 #include <crm/common/ipcs.h>
37 
38 #define PCMK_IPC_VERSION 1
39 
40 struct crm_ipc_response_header {
41  struct qb_ipc_response_header qb;
42  uint32_t size_uncompressed;
43  uint32_t size_compressed;
45  uint8_t version; /* Protect against version changes for anyone that might bother to statically link us */
46 };
47 
48 static int hdr_offset = 0;
49 static unsigned int ipc_buffer_max = 0;
50 static unsigned int pick_ipc_buffer(unsigned int max);
51 
52 static inline void
53 crm_ipc_init(void)
54 {
55  if (hdr_offset == 0) {
56  hdr_offset = sizeof(struct crm_ipc_response_header);
57  }
58  if (ipc_buffer_max == 0) {
59  ipc_buffer_max = pick_ipc_buffer(0);
60  }
61 }
62 
63 unsigned int
65 {
66  return pick_ipc_buffer(0);
67 }
68 
69 static char *
70 generateReference(const char *custom1, const char *custom2)
71 {
72  static uint ref_counter = 0;
73  const char *local_cust1 = custom1;
74  const char *local_cust2 = custom2;
75  int reference_len = 4;
76  char *since_epoch = NULL;
77 
78  reference_len += 20; /* too big */
79  reference_len += 40; /* too big */
80 
81  if (local_cust1 == NULL) {
82  local_cust1 = "_empty_";
83  }
84  reference_len += strlen(local_cust1);
85 
86  if (local_cust2 == NULL) {
87  local_cust2 = "_empty_";
88  }
89  reference_len += strlen(local_cust2);
90 
91  since_epoch = calloc(1, reference_len);
92 
93  if (since_epoch != NULL) {
94  sprintf(since_epoch, "%s-%s-%lu-%u",
95  local_cust1, local_cust2, (unsigned long)time(NULL), ref_counter++);
96  }
97 
98  return since_epoch;
99 }
100 
101 xmlNode *
102 create_request_adv(const char *task, xmlNode * msg_data,
103  const char *host_to, const char *sys_to,
104  const char *sys_from, const char *uuid_from, const char *origin)
105 {
106  char *true_from = NULL;
107  xmlNode *request = NULL;
108  char *reference = generateReference(task, sys_from);
109 
110  if (uuid_from != NULL) {
111  true_from = generate_hash_key(sys_from, uuid_from);
112  } else if (sys_from != NULL) {
113  true_from = strdup(sys_from);
114  } else {
115  crm_err("No sys from specified");
116  }
117 
118  /* host_from will get set for us if necessary by CRMd when routed */
119  request = create_xml_node(NULL, __FUNCTION__);
120  crm_xml_add(request, F_CRM_ORIGIN, origin);
121  crm_xml_add(request, F_TYPE, T_CRM);
124  crm_xml_add(request, F_CRM_REFERENCE, reference);
125  crm_xml_add(request, F_CRM_TASK, task);
126  crm_xml_add(request, F_CRM_SYS_TO, sys_to);
127  crm_xml_add(request, F_CRM_SYS_FROM, true_from);
128 
129  /* HOSTTO will be ignored if it is to the DC anyway. */
130  if (host_to != NULL && strlen(host_to) > 0) {
131  crm_xml_add(request, F_CRM_HOST_TO, host_to);
132  }
133 
134  if (msg_data != NULL) {
135  add_message_xml(request, F_CRM_DATA, msg_data);
136  }
137  free(reference);
138  free(true_from);
139 
140  return request;
141 }
142 
143 /*
144  * This method adds a copy of xml_response_data
145  */
146 xmlNode *
147 create_reply_adv(xmlNode * original_request, xmlNode * xml_response_data, const char *origin)
148 {
149  xmlNode *reply = NULL;
150 
151  const char *host_from = crm_element_value(original_request, F_CRM_HOST_FROM);
152  const char *sys_from = crm_element_value(original_request, F_CRM_SYS_FROM);
153  const char *sys_to = crm_element_value(original_request, F_CRM_SYS_TO);
154  const char *type = crm_element_value(original_request, F_CRM_MSG_TYPE);
155  const char *operation = crm_element_value(original_request, F_CRM_TASK);
156  const char *crm_msg_reference = crm_element_value(original_request, F_CRM_REFERENCE);
157 
158  if (type == NULL) {
159  crm_err("Cannot create new_message, no message type in original message");
160  CRM_ASSERT(type != NULL);
161  return NULL;
162 #if 0
163  } else if (strcasecmp(XML_ATTR_REQUEST, type) != 0) {
164  crm_err("Cannot create new_message, original message was not a request");
165  return NULL;
166 #endif
167  }
168  reply = create_xml_node(NULL, __FUNCTION__);
169  if (reply == NULL) {
170  crm_err("Cannot create new_message, malloc failed");
171  return NULL;
172  }
173 
174  crm_xml_add(reply, F_CRM_ORIGIN, origin);
175  crm_xml_add(reply, F_TYPE, T_CRM);
178  crm_xml_add(reply, F_CRM_REFERENCE, crm_msg_reference);
179  crm_xml_add(reply, F_CRM_TASK, operation);
180 
181  /* since this is a reply, we reverse the from and to */
182  crm_xml_add(reply, F_CRM_SYS_TO, sys_from);
183  crm_xml_add(reply, F_CRM_SYS_FROM, sys_to);
184 
185  /* HOSTTO will be ignored if it is to the DC anyway. */
186  if (host_from != NULL && strlen(host_from) > 0) {
187  crm_xml_add(reply, F_CRM_HOST_TO, host_from);
188  }
189 
190  if (xml_response_data != NULL) {
191  add_message_xml(reply, F_CRM_DATA, xml_response_data);
192  }
193 
194  return reply;
195 }
196 
197 /* Libqb based IPC */
198 
199 /* Server... */
200 
201 GHashTable *client_connections = NULL;
202 
203 crm_client_t *
204 crm_client_get(qb_ipcs_connection_t * c)
205 {
206  if (client_connections) {
207  return g_hash_table_lookup(client_connections, c);
208  }
209 
210  crm_trace("No client found for %p", c);
211  return NULL;
212 }
213 
214 crm_client_t *
215 crm_client_get_by_id(const char *id)
216 {
217  gpointer key;
218  crm_client_t *client;
219  GHashTableIter iter;
220 
221  if (client_connections && id) {
222  g_hash_table_iter_init(&iter, client_connections);
223  while (g_hash_table_iter_next(&iter, &key, (gpointer *) & client)) {
224  if (strcmp(client->id, id) == 0) {
225  return client;
226  }
227  }
228  }
229 
230  crm_trace("No client found with id=%s", id);
231  return NULL;
232 }
233 
234 const char *
236 {
237  if (c == NULL) {
238  return "null";
239  } else if (c->name == NULL && c->id == NULL) {
240  return "unknown";
241  } else if (c->name == NULL) {
242  return c->id;
243  } else {
244  return c->name;
245  }
246 }
247 
248 void
250 {
251  if (client_connections == NULL) {
252  crm_trace("Creating client hash table");
253  client_connections = g_hash_table_new(g_direct_hash, g_direct_equal);
254  }
255 }
256 
257 void
259 {
260  if (client_connections != NULL) {
261  int active = g_hash_table_size(client_connections);
262 
263  if (active) {
264  crm_err("Exiting with %d active connections", active);
265  }
266  g_hash_table_destroy(client_connections); client_connections = NULL;
267  }
268 }
269 
270 void
271 crm_client_disconnect_all(qb_ipcs_service_t *service)
272 {
273  qb_ipcs_connection_t *c = NULL;
274 
275  if (service == NULL) {
276  return;
277  }
278 
279  c = qb_ipcs_connection_first_get(service);
280 
281  while (c != NULL) {
282  qb_ipcs_connection_t *last = c;
283 
284  c = qb_ipcs_connection_next_get(service, last);
285 
286  /* There really shouldn't be anyone connected at this point */
287  crm_notice("Disconnecting client %p, pid=%d...", last, crm_ipcs_client_pid(last));
288  qb_ipcs_disconnect(last);
289  qb_ipcs_connection_unref(last);
290  }
291 }
292 
293 crm_client_t *
294 crm_client_new(qb_ipcs_connection_t * c, uid_t uid_client, gid_t gid_client)
295 {
296  static gid_t gid_cluster = 0;
297 
298  crm_client_t *client = NULL;
299 
300  CRM_LOG_ASSERT(c);
301  if (c == NULL) {
302  return NULL;
303  }
304 
305  if (gid_cluster == 0) {
306  if(crm_user_lookup(CRM_DAEMON_USER, NULL, &gid_cluster) < 0) {
307  static bool have_error = FALSE;
308  if(have_error == FALSE) {
309  crm_warn("Could not find group for user %s", CRM_DAEMON_USER);
310  have_error = TRUE;
311  }
312  }
313  }
314 
315  if (uid_client != 0) {
316  crm_trace("Giving access to group %u", gid_cluster);
317  /* Passing -1 to chown(2) means don't change */
318  qb_ipcs_connection_auth_set(c, -1, gid_cluster, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
319  }
320 
321  crm_client_init();
322 
323  /* TODO: Do our own auth checking, return NULL if unauthorized */
324  client = calloc(1, sizeof(crm_client_t));
325 
326  client->ipcs = c;
327  client->kind = CRM_CLIENT_IPC;
328  client->pid = crm_ipcs_client_pid(c);
329 
330  client->id = crm_generate_uuid();
331 
332  crm_debug("Connecting %p for uid=%d gid=%d pid=%u id=%s", c, uid_client, gid_client, client->pid, client->id);
333 
334 #if ENABLE_ACL
335  client->user = uid2username(uid_client);
336 #endif
337 
338  g_hash_table_insert(client_connections, c, client);
339  return client;
340 }
341 
342 void
344 {
345  if (c == NULL) {
346  return;
347  }
348 
349  if (client_connections) {
350  if (c->ipcs) {
351  crm_trace("Destroying %p/%p (%d remaining)",
352  c, c->ipcs, crm_hash_table_size(client_connections) - 1);
353  g_hash_table_remove(client_connections, c->ipcs);
354 
355  } else {
356  crm_trace("Destroying remote connection %p (%d remaining)",
357  c, crm_hash_table_size(client_connections) - 1);
358  g_hash_table_remove(client_connections, c->id);
359  }
360  }
361 
362  if (c->event_timer) {
363  g_source_remove(c->event_timer);
364  }
365 
366  crm_debug("Destroying %d events", g_list_length(c->event_queue));
367  while (c->event_queue) {
368  struct iovec *event = c->event_queue->data;
369 
370  c->event_queue = g_list_remove(c->event_queue, event);
371  free(event[0].iov_base);
372  free(event[1].iov_base);
373  free(event);
374  }
375 
376  free(c->id);
377  free(c->name);
378  free(c->user);
379  if (c->remote) {
380  if (c->remote->auth_timeout) {
381  g_source_remove(c->remote->auth_timeout);
382  }
383  free(c->remote->buffer);
384  free(c->remote);
385  }
386  free(c);
387 }
388 
389 int
390 crm_ipcs_client_pid(qb_ipcs_connection_t * c)
391 {
392  struct qb_ipcs_connection_stats stats;
393 
394  stats.client_pid = 0;
395  qb_ipcs_connection_stats_get(c, &stats, 0);
396  return stats.client_pid;
397 }
398 
399 xmlNode *
401 {
402  xmlNode *xml = NULL;
403  char *uncompressed = NULL;
404  char *text = ((char *)data) + sizeof(struct crm_ipc_response_header);
405  struct crm_ipc_response_header *header = data;
406 
407  if (id) {
408  *id = ((struct qb_ipc_response_header *)data)->id;
409  }
410  if (flags) {
411  *flags = header->flags;
412  }
413 
414  if (is_set(header->flags, crm_ipc_proxied)) {
415  /* mark this client as being the endpoint of a proxy connection.
416  * Proxy connections responses are sent on the event channel to avoid
417  * blocking the proxy daemon (crmd) */
419  }
420 
421  if(header->version > PCMK_IPC_VERSION) {
422  crm_err("Filtering incompatible v%d IPC message, we only support versions <= %d",
423  header->version, PCMK_IPC_VERSION);
424  return NULL;
425  }
426 
427  if (header->size_compressed) {
428  int rc = 0;
429  unsigned int size_u = 1 + header->size_uncompressed;
430  uncompressed = calloc(1, size_u);
431 
432  crm_trace("Decompressing message data %u bytes into %u bytes",
433  header->size_compressed, size_u);
434 
435  rc = BZ2_bzBuffToBuffDecompress(uncompressed, &size_u, text, header->size_compressed, 1, 0);
436  text = uncompressed;
437 
438  if (rc != BZ_OK) {
439  crm_err("Decompression failed: %s (%d)", bz2_strerror(rc), rc);
440  free(uncompressed);
441  return NULL;
442  }
443  }
444 
445  CRM_ASSERT(text[header->size_uncompressed - 1] == 0);
446 
447  crm_trace("Received %.200s", text);
448  xml = string2xml(text);
449 
450  free(uncompressed);
451  return xml;
452 }
453 
455 
456 static gboolean
457 crm_ipcs_flush_events_cb(gpointer data)
458 {
459  crm_client_t *c = data;
460 
461  c->event_timer = 0;
463  return FALSE;
464 }
465 
466 ssize_t
468 {
469  int sent = 0;
470  ssize_t rc = 0;
471  int queue_len = 0;
472 
473  if (c == NULL) {
474  return pcmk_ok;
475 
476  } else if (c->event_timer) {
477  /* There is already a timer, wait until it goes off */
478  crm_trace("Timer active for %p - %d", c->ipcs, c->event_timer);
479  return pcmk_ok;
480  }
481 
482  queue_len = g_list_length(c->event_queue);
483  while (c->event_queue && sent < 100) {
484  struct crm_ipc_response_header *header = NULL;
485  struct iovec *event = c->event_queue->data;
486 
487  rc = qb_ipcs_event_sendv(c->ipcs, event, 2);
488  if (rc < 0) {
489  break;
490  }
491 
492  sent++;
493  header = event[0].iov_base;
494  if (header->size_compressed) {
495  crm_trace("Event %d to %p[%d] (%lld compressed bytes) sent",
496  header->qb.id, c->ipcs, c->pid, (long long) rc);
497  } else {
498  crm_trace("Event %d to %p[%d] (%lld bytes) sent: %.120s",
499  header->qb.id, c->ipcs, c->pid, (long long) rc,
500  (char *) (event[1].iov_base));
501  }
502 
503  c->event_queue = g_list_remove(c->event_queue, event);
504  free(event[0].iov_base);
505  free(event[1].iov_base);
506  free(event);
507  }
508 
509  queue_len -= sent;
510  if (sent > 0 || c->event_queue) {
511  crm_trace("Sent %d events (%d remaining) for %p[%d]: %s (%lld)",
512  sent, queue_len, c->ipcs, c->pid,
513  pcmk_strerror(rc < 0 ? rc : 0), (long long) rc);
514  }
515 
516  if (c->event_queue) {
517  if (queue_len % 100 == 0 && queue_len > 99) {
518  crm_warn("Event queue for %p[%d] has grown to %d", c->ipcs, c->pid, queue_len);
519 
520  } else if (queue_len > 500) {
521  crm_err("Evicting slow client %p[%d]: event queue reached %d entries",
522  c->ipcs, c->pid, queue_len);
523  qb_ipcs_disconnect(c->ipcs);
524  return rc;
525  }
526 
527  c->event_timer = g_timeout_add(1000 + 100 * queue_len, crm_ipcs_flush_events_cb, c);
528  }
529 
530  return rc;
531 }
532 
533 ssize_t
534 crm_ipc_prepare(uint32_t request, xmlNode * message, struct iovec ** result, uint32_t max_send_size)
535 {
536  static unsigned int biggest = 0;
537  struct iovec *iov;
538  unsigned int total = 0;
539  char *compressed = NULL;
540  char *buffer = dump_xml_unformatted(message);
541  struct crm_ipc_response_header *header = calloc(1, sizeof(struct crm_ipc_response_header));
542 
543  CRM_ASSERT(result != NULL);
544 
545  crm_ipc_init();
546 
547  if (max_send_size == 0) {
548  max_send_size = ipc_buffer_max;
549  }
550 
551  CRM_LOG_ASSERT(max_send_size != 0);
552 
553  *result = NULL;
554  iov = calloc(2, sizeof(struct iovec));
555 
556 
557  iov[0].iov_len = hdr_offset;
558  iov[0].iov_base = header;
559 
560  header->version = PCMK_IPC_VERSION;
561  header->size_uncompressed = 1 + strlen(buffer);
562  total = iov[0].iov_len + header->size_uncompressed;
563 
564  if (total < max_send_size) {
565  iov[1].iov_base = buffer;
566  iov[1].iov_len = header->size_uncompressed;
567 
568  } else {
569  unsigned int new_size = 0;
570 
572  (buffer, header->size_uncompressed, max_send_size, &compressed, &new_size)) {
573 
574  header->flags |= crm_ipc_compressed;
575  header->size_compressed = new_size;
576 
577  iov[1].iov_len = header->size_compressed;
578  iov[1].iov_base = compressed;
579 
580  free(buffer);
581 
582  biggest = QB_MAX(header->size_compressed, biggest);
583 
584  } else {
585  ssize_t rc = -EMSGSIZE;
586 
587  crm_log_xml_trace(message, "EMSGSIZE");
588  biggest = QB_MAX(header->size_uncompressed, biggest);
589 
590  crm_err
591  ("Could not compress the message (%u bytes) into less than the configured ipc limit (%u bytes). "
592  "Set PCMK_ipc_buffer to a higher value (%u bytes suggested)",
593  header->size_uncompressed, max_send_size, 4 * biggest);
594 
595  free(compressed);
596  free(buffer);
597  free(header);
598  free(iov);
599 
600  return rc;
601  }
602  }
603 
604  header->qb.size = iov[0].iov_len + iov[1].iov_len;
605  header->qb.id = (int32_t)request; /* Replying to a specific request */
606 
607  *result = iov;
608  CRM_ASSERT(header->qb.size > 0);
609  return header->qb.size;
610 }
611 
612 ssize_t
613 crm_ipcs_sendv(crm_client_t * c, struct iovec * iov, enum crm_ipc_flags flags)
614 {
615  ssize_t rc;
616  static uint32_t id = 1;
617  struct crm_ipc_response_header *header = iov[0].iov_base;
618 
620  /* _ALL_ replies to proxied connections need to be sent as events */
621  if (is_not_set(flags, crm_ipc_server_event)) {
622  flags |= crm_ipc_server_event;
623  /* this flag lets us know this was originally meant to be a response.
624  * even though we're sending it over the event channel. */
626  }
627  }
628 
629  header->flags |= flags;
630  if (flags & crm_ipc_server_event) {
631  header->qb.id = id++; /* We don't really use it, but doesn't hurt to set one */
632 
633  if (flags & crm_ipc_server_free) {
634  crm_trace("Sending the original to %p[%d]", c->ipcs, c->pid);
635  c->event_queue = g_list_append(c->event_queue, iov);
636 
637  } else {
638  struct iovec *iov_copy = calloc(2, sizeof(struct iovec));
639 
640  crm_trace("Sending a copy to %p[%d]", c->ipcs, c->pid);
641  iov_copy[0].iov_len = iov[0].iov_len;
642  iov_copy[0].iov_base = malloc(iov[0].iov_len);
643  memcpy(iov_copy[0].iov_base, iov[0].iov_base, iov[0].iov_len);
644 
645  iov_copy[1].iov_len = iov[1].iov_len;
646  iov_copy[1].iov_base = malloc(iov[1].iov_len);
647  memcpy(iov_copy[1].iov_base, iov[1].iov_base, iov[1].iov_len);
648 
649  c->event_queue = g_list_append(c->event_queue, iov_copy);
650  }
651 
652  } else {
653  CRM_LOG_ASSERT(header->qb.id != 0); /* Replying to a specific request */
654 
655  rc = qb_ipcs_response_sendv(c->ipcs, iov, 2);
656  if (rc < header->qb.size) {
657  crm_notice("Response %d to %p[%d] (%u bytes) failed: %s (%d)",
658  header->qb.id, c->ipcs, c->pid, header->qb.size, pcmk_strerror(rc), rc);
659 
660  } else {
661  crm_trace("Response %d sent, %lld bytes to %p[%d]",
662  header->qb.id, (long long) rc, c->ipcs, c->pid);
663  }
664 
665  if (flags & crm_ipc_server_free) {
666  free(iov[0].iov_base);
667  free(iov[1].iov_base);
668  free(iov);
669  }
670  }
671 
672  if (flags & crm_ipc_server_event) {
673  rc = crm_ipcs_flush_events(c);
674  } else {
676  }
677 
678  if (rc == -EPIPE || rc == -ENOTCONN) {
679  crm_trace("Client %p disconnected", c->ipcs);
680  }
681 
682  return rc;
683 }
684 
685 ssize_t
686 crm_ipcs_send(crm_client_t * c, uint32_t request, xmlNode * message,
687  enum crm_ipc_flags flags)
688 {
689  struct iovec *iov = NULL;
690  ssize_t rc = 0;
691 
692  if(c == NULL) {
693  return -EDESTADDRREQ;
694  }
695  crm_ipc_init();
696 
697  rc = crm_ipc_prepare(request, message, &iov, ipc_buffer_max);
698  if (rc > 0) {
699  rc = crm_ipcs_sendv(c, iov, flags | crm_ipc_server_free);
700 
701  } else {
702  free(iov);
703  crm_notice("Message to %p[%d] failed: %s (%d)",
704  c->ipcs, c->pid, pcmk_strerror(rc), rc);
705  }
706 
707  return rc;
708 }
709 
710 void
711 crm_ipcs_send_ack(crm_client_t * c, uint32_t request, uint32_t flags, const char *tag, const char *function,
712  int line)
713 {
714  if (flags & crm_ipc_client_response) {
715  xmlNode *ack = create_xml_node(NULL, tag);
716 
717  crm_trace("Ack'ing msg from %s (%p)", crm_client_name(c), c);
718  c->request_id = 0;
719  crm_xml_add(ack, "function", function);
720  crm_xml_add_int(ack, "line", line);
721  crm_ipcs_send(c, request, ack, flags);
722  free_xml(ack);
723  }
724 }
725 
726 /* Client... */
727 
728 #define MIN_MSG_SIZE 12336 /* sizeof(struct qb_ipc_connection_response) */
729 #define MAX_MSG_SIZE 128*1024 /* 128k default */
730 
731 struct crm_ipc_s {
732  struct pollfd pfd;
733 
734  /* the max size we can send/receive over ipc */
735  unsigned int max_buf_size;
736  /* Size of the allocated 'buffer' */
737  unsigned int buf_size;
738  int msg_size;
739  int need_reply;
740  char *buffer;
741  char *name;
742  uint32_t buffer_flags;
743 
744  qb_ipcc_connection_t *ipc;
745 
746 };
747 
748 static unsigned int
749 pick_ipc_buffer(unsigned int max)
750 {
751  static unsigned int global_max = 0;
752 
753  if (global_max == 0) {
754  const char *env = getenv("PCMK_ipc_buffer");
755 
756  if (env) {
757  int env_max = crm_parse_int(env, "0");
758 
759  global_max = (env_max > 0)? QB_MAX(MIN_MSG_SIZE, env_max) : MAX_MSG_SIZE;
760 
761  } else {
762  global_max = MAX_MSG_SIZE;
763  }
764  }
765 
766  return QB_MAX(max, global_max);
767 }
768 
769 crm_ipc_t *
770 crm_ipc_new(const char *name, size_t max_size)
771 {
772  crm_ipc_t *client = NULL;
773 
774  client = calloc(1, sizeof(crm_ipc_t));
775 
776  client->name = strdup(name);
777  client->buf_size = pick_ipc_buffer(max_size);
778  client->buffer = malloc(client->buf_size);
779 
780  /* Clients initiating connection pick the max buf size */
781  client->max_buf_size = client->buf_size;
782 
783  client->pfd.fd = -1;
784  client->pfd.events = POLLIN;
785  client->pfd.revents = 0;
786 
787  return client;
788 }
789 
797 bool
799 {
800  client->need_reply = FALSE;
801  client->ipc = qb_ipcc_connect(client->name, client->buf_size);
802 
803  if (client->ipc == NULL) {
804  crm_debug("Could not establish %s connection: %s (%d)", client->name, pcmk_strerror(errno), errno);
805  return FALSE;
806  }
807 
808  client->pfd.fd = crm_ipc_get_fd(client);
809  if (client->pfd.fd < 0) {
810  crm_debug("Could not obtain file descriptor for %s connection: %s (%d)", client->name, pcmk_strerror(errno), errno);
811  return FALSE;
812  }
813 
814  qb_ipcc_context_set(client->ipc, client);
815 
816 #ifdef HAVE_IPCS_GET_BUFFER_SIZE
817  client->max_buf_size = qb_ipcc_get_buffer_size(client->ipc);
818  if (client->max_buf_size > client->buf_size) {
819  free(client->buffer);
820  client->buffer = calloc(1, client->max_buf_size);
821  client->buf_size = client->max_buf_size;
822  }
823 #endif
824 
825  return TRUE;
826 }
827 
828 void
830 {
831  if (client) {
832  crm_trace("Disconnecting %s IPC connection %p (%p)", client->name, client, client->ipc);
833 
834  if (client->ipc) {
835  qb_ipcc_connection_t *ipc = client->ipc;
836 
837  client->ipc = NULL;
838  qb_ipcc_disconnect(ipc);
839  }
840  }
841 }
842 
843 void
845 {
846  if (client) {
847  if (client->ipc && qb_ipcc_is_connected(client->ipc)) {
848  crm_notice("Destroying an active IPC connection to %s", client->name);
849  /* The next line is basically unsafe
850  *
851  * If this connection was attached to mainloop and mainloop is active,
852  * the 'disconnected' callback will end up back here and we'll end
853  * up free'ing the memory twice - something that can still happen
854  * even without this if we destroy a connection and it closes before
855  * we call exit
856  */
857  /* crm_ipc_close(client); */
858  }
859  crm_trace("Destroying IPC connection to %s: %p", client->name, client);
860  free(client->buffer);
861  free(client->name);
862  free(client);
863  }
864 }
865 
866 int
868 {
869  int fd = 0;
870 
871  if (client && client->ipc && (qb_ipcc_fd_get(client->ipc, &fd) == 0)) {
872  return fd;
873  }
874  errno = EINVAL;
875  crm_perror(LOG_ERR, "Could not obtain file IPC descriptor for %s",
876  (client? client->name : "unspecified client"));
877  return -errno;
878 }
879 
880 bool
882 {
883  bool rc = FALSE;
884 
885  if (client == NULL) {
886  crm_trace("No client");
887  return FALSE;
888 
889  } else if (client->ipc == NULL) {
890  crm_trace("No connection");
891  return FALSE;
892 
893  } else if (client->pfd.fd < 0) {
894  crm_trace("Bad descriptor");
895  return FALSE;
896  }
897 
898  rc = qb_ipcc_is_connected(client->ipc);
899  if (rc == FALSE) {
900  client->pfd.fd = -EINVAL;
901  }
902  return rc;
903 }
904 
912 int
914 {
915  int rc;
916 
917  CRM_ASSERT(client != NULL);
918 
919  if (crm_ipc_connected(client) == FALSE) {
920  return -ENOTCONN;
921  }
922 
923  client->pfd.revents = 0;
924  rc = poll(&(client->pfd), 1, 0);
925  return (rc < 0)? -errno : rc;
926 }
927 
928 static int
929 crm_ipc_decompress(crm_ipc_t * client)
930 {
931  struct crm_ipc_response_header *header = (struct crm_ipc_response_header *)(void*)client->buffer;
932 
933  if (header->size_compressed) {
934  int rc = 0;
935  unsigned int size_u = 1 + header->size_uncompressed;
936  /* never let buf size fall below our max size required for ipc reads. */
937  unsigned int new_buf_size = QB_MAX((hdr_offset + size_u), client->max_buf_size);
938  char *uncompressed = calloc(1, new_buf_size);
939 
940  crm_trace("Decompressing message data %u bytes into %u bytes",
941  header->size_compressed, size_u);
942 
943  rc = BZ2_bzBuffToBuffDecompress(uncompressed + hdr_offset, &size_u,
944  client->buffer + hdr_offset, header->size_compressed, 1, 0);
945 
946  if (rc != BZ_OK) {
947  crm_err("Decompression failed: %s (%d)", bz2_strerror(rc), rc);
948  free(uncompressed);
949  return -EILSEQ;
950  }
951 
952  /*
953  * This assert no longer holds true. For an identical msg, some clients may
954  * require compression, and others may not. If that same msg (event) is sent
955  * to multiple clients, it could result in some clients receiving a compressed
956  * msg even though compression was not explicitly required for them.
957  *
958  * CRM_ASSERT((header->size_uncompressed + hdr_offset) >= ipc_buffer_max);
959  */
960  CRM_ASSERT(size_u == header->size_uncompressed);
961 
962  memcpy(uncompressed, client->buffer, hdr_offset); /* Preserve the header */
963  header = (struct crm_ipc_response_header *)(void*)uncompressed;
964 
965  free(client->buffer);
966  client->buf_size = new_buf_size;
967  client->buffer = uncompressed;
968  }
969 
970  CRM_ASSERT(client->buffer[hdr_offset + header->size_uncompressed - 1] == 0);
971  return pcmk_ok;
972 }
973 
974 long
976 {
977  struct crm_ipc_response_header *header = NULL;
978 
979  CRM_ASSERT(client != NULL);
980  CRM_ASSERT(client->ipc != NULL);
981  CRM_ASSERT(client->buffer != NULL);
982 
983  crm_ipc_init();
984 
985  client->buffer[0] = 0;
986  client->msg_size = qb_ipcc_event_recv(client->ipc, client->buffer, client->buf_size - 1, 0);
987  if (client->msg_size >= 0) {
988  int rc = crm_ipc_decompress(client);
989 
990  if (rc != pcmk_ok) {
991  return rc;
992  }
993 
994  header = (struct crm_ipc_response_header *)(void*)client->buffer;
995  if(header->version > PCMK_IPC_VERSION) {
996  crm_err("Filtering incompatible v%d IPC message, we only support versions <= %d",
997  header->version, PCMK_IPC_VERSION);
998  return -EBADMSG;
999  }
1000 
1001  crm_trace("Received %s event %d, size=%u, rc=%d, text: %.100s",
1002  client->name, header->qb.id, header->qb.size, client->msg_size,
1003  client->buffer + hdr_offset);
1004 
1005  } else {
1006  crm_trace("No message from %s received: %s", client->name, pcmk_strerror(client->msg_size));
1007  }
1008 
1009  if (crm_ipc_connected(client) == FALSE || client->msg_size == -ENOTCONN) {
1010  crm_err("Connection to %s failed", client->name);
1011  }
1012 
1013  if (header) {
1014  /* Data excluding the header */
1015  return header->size_uncompressed;
1016  }
1017  return -ENOMSG;
1018 }
1019 
1020 const char *
1022 {
1023  CRM_ASSERT(client != NULL);
1024  return client->buffer + sizeof(struct crm_ipc_response_header);
1025 }
1026 
1027 uint32_t
1029 {
1030  struct crm_ipc_response_header *header = NULL;
1031 
1032  CRM_ASSERT(client != NULL);
1033  if (client->buffer == NULL) {
1034  return 0;
1035  }
1036 
1037  header = (struct crm_ipc_response_header *)(void*)client->buffer;
1038  return header->flags;
1039 }
1040 
1041 const char *
1043 {
1044  CRM_ASSERT(client != NULL);
1045  return client->name;
1046 }
1047 
1048 static int
1049 internal_ipc_send_recv(crm_ipc_t * client, const void *iov)
1050 {
1051  int rc = 0;
1052 
1053  do {
1054  rc = qb_ipcc_sendv_recv(client->ipc, iov, 2, client->buffer, client->buf_size, -1);
1055  } while (rc == -EAGAIN && crm_ipc_connected(client));
1056 
1057  return rc;
1058 }
1059 
1060 static int
1061 internal_ipc_send_request(crm_ipc_t * client, const void *iov, int ms_timeout)
1062 {
1063  int rc = 0;
1064  time_t timeout = time(NULL) + 1 + (ms_timeout / 1000);
1065 
1066  do {
1067  rc = qb_ipcc_sendv(client->ipc, iov, 2);
1068  } while (rc == -EAGAIN && time(NULL) < timeout && crm_ipc_connected(client));
1069 
1070  return rc;
1071 }
1072 
1073 static int
1074 internal_ipc_get_reply(crm_ipc_t * client, int request_id, int ms_timeout)
1075 {
1076  time_t timeout = time(NULL) + 1 + (ms_timeout / 1000);
1077  int rc = 0;
1078 
1079  crm_ipc_init();
1080 
1081  /* get the reply */
1082  crm_trace("client %s waiting on reply to msg id %d", client->name, request_id);
1083  do {
1084 
1085  rc = qb_ipcc_recv(client->ipc, client->buffer, client->buf_size, 1000);
1086  if (rc > 0) {
1087  struct crm_ipc_response_header *hdr = NULL;
1088 
1089  int rc = crm_ipc_decompress(client);
1090 
1091  if (rc != pcmk_ok) {
1092  return rc;
1093  }
1094 
1095  hdr = (struct crm_ipc_response_header *)(void*)client->buffer;
1096  if (hdr->qb.id == request_id) {
1097  /* Got it */
1098  break;
1099  } else if (hdr->qb.id < request_id) {
1100  xmlNode *bad = string2xml(crm_ipc_buffer(client));
1101 
1102  crm_err("Discarding old reply %d (need %d)", hdr->qb.id, request_id);
1103  crm_log_xml_notice(bad, "OldIpcReply");
1104 
1105  } else {
1106  xmlNode *bad = string2xml(crm_ipc_buffer(client));
1107 
1108  crm_err("Discarding newer reply %d (need %d)", hdr->qb.id, request_id);
1109  crm_log_xml_notice(bad, "ImpossibleReply");
1110  CRM_ASSERT(hdr->qb.id <= request_id);
1111  }
1112  } else if (crm_ipc_connected(client) == FALSE) {
1113  crm_err("Server disconnected client %s while waiting for msg id %d", client->name,
1114  request_id);
1115  break;
1116  }
1117 
1118  } while (time(NULL) < timeout);
1119 
1120  return rc;
1121 }
1122 
1123 int
1124 crm_ipc_send(crm_ipc_t * client, xmlNode * message, enum crm_ipc_flags flags, int32_t ms_timeout,
1125  xmlNode ** reply)
1126 {
1127  long rc = 0;
1128  struct iovec *iov;
1129  static uint32_t id = 0;
1130  static int factor = 8;
1131  struct crm_ipc_response_header *header;
1132 
1133  crm_ipc_init();
1134 
1135  if (client == NULL) {
1136  crm_notice("Invalid connection");
1137  return -ENOTCONN;
1138 
1139  } else if (crm_ipc_connected(client) == FALSE) {
1140  /* Don't even bother */
1141  crm_notice("Connection to %s closed", client->name);
1142  return -ENOTCONN;
1143  }
1144 
1145  if (ms_timeout == 0) {
1146  ms_timeout = 5000;
1147  }
1148 
1149  if (client->need_reply) {
1150  crm_trace("Trying again to obtain pending reply from %s", client->name);
1151  rc = qb_ipcc_recv(client->ipc, client->buffer, client->buf_size, ms_timeout);
1152  if (rc < 0) {
1153  crm_warn("Sending to %s (%p) is disabled until pending reply is received", client->name,
1154  client->ipc);
1155  return -EALREADY;
1156 
1157  } else {
1158  crm_notice("Lost reply from %s (%p) finally arrived, sending re-enabled", client->name,
1159  client->ipc);
1160  client->need_reply = FALSE;
1161  }
1162  }
1163 
1164  id++;
1165  CRM_LOG_ASSERT(id != 0); /* Crude wrap-around detection */
1166  rc = crm_ipc_prepare(id, message, &iov, client->max_buf_size);
1167  if(rc < 0) {
1168  return rc;
1169  }
1170 
1171  header = iov[0].iov_base;
1172  header->flags |= flags;
1173 
1174  if(is_set(flags, crm_ipc_proxied)) {
1175  /* Don't look for a synchronous response */
1177  }
1178 
1179  if(header->size_compressed) {
1180  if(factor < 10 && (client->max_buf_size / 10) < (rc / factor)) {
1181  crm_notice("Compressed message exceeds %d0%% of the configured ipc limit (%u bytes), "
1182  "consider setting PCMK_ipc_buffer to %u or higher",
1183  factor, client->max_buf_size, 2 * client->max_buf_size);
1184  factor++;
1185  }
1186  }
1187 
1188  crm_trace("Sending from client: %s request id: %d bytes: %u timeout:%d msg...",
1189  client->name, header->qb.id, header->qb.size, ms_timeout);
1190 
1191  if (ms_timeout > 0 || is_not_set(flags, crm_ipc_client_response)) {
1192 
1193  rc = internal_ipc_send_request(client, iov, ms_timeout);
1194 
1195  if (rc <= 0) {
1196  crm_trace("Failed to send from client %s request %d with %u bytes...",
1197  client->name, header->qb.id, header->qb.size);
1198  goto send_cleanup;
1199 
1200  } else if (is_not_set(flags, crm_ipc_client_response)) {
1201  crm_trace("Message sent, not waiting for reply to %d from %s to %u bytes...",
1202  header->qb.id, client->name, header->qb.size);
1203 
1204  goto send_cleanup;
1205  }
1206 
1207  rc = internal_ipc_get_reply(client, header->qb.id, ms_timeout);
1208  if (rc < 0) {
1209  /* No reply, for now, disable sending
1210  *
1211  * The alternative is to close the connection since we don't know
1212  * how to detect and discard out-of-sequence replies
1213  *
1214  * TODO - implement the above
1215  */
1216  client->need_reply = TRUE;
1217  }
1218 
1219  } else {
1220  rc = internal_ipc_send_recv(client, iov);
1221  }
1222 
1223  if (rc > 0) {
1224  struct crm_ipc_response_header *hdr = (struct crm_ipc_response_header *)(void*)client->buffer;
1225 
1226  crm_trace("Received response %d, size=%u, rc=%ld, text: %.200s", hdr->qb.id, hdr->qb.size,
1227  rc, crm_ipc_buffer(client));
1228 
1229  if (reply) {
1230  *reply = string2xml(crm_ipc_buffer(client));
1231  }
1232 
1233  } else {
1234  crm_trace("Response not received: rc=%ld, errno=%d", rc, errno);
1235  }
1236 
1237  send_cleanup:
1238  if (crm_ipc_connected(client) == FALSE) {
1239  crm_notice("Connection to %s closed: %s (%ld)", client->name, pcmk_strerror(rc), rc);
1240 
1241  } else if (rc == -ETIMEDOUT) {
1242  crm_warn("Request %d to %s (%p) failed: %s (%ld) after %dms",
1243  header->qb.id, client->name, client->ipc, pcmk_strerror(rc), rc, ms_timeout);
1244  crm_write_blackbox(0, NULL);
1245 
1246  } else if (rc <= 0) {
1247  crm_warn("Request %d to %s (%p) failed: %s (%ld)",
1248  header->qb.id, client->name, client->ipc, pcmk_strerror(rc), rc);
1249  }
1250 
1251  free(header);
1252  free(iov[1].iov_base);
1253  free(iov);
1254  return rc;
1255 }
1256 
1257 /* Utils */
1258 
1259 xmlNode *
1260 create_hello_message(const char *uuid,
1261  const char *client_name, const char *major_version, const char *minor_version)
1262 {
1263  xmlNode *hello_node = NULL;
1264  xmlNode *hello = NULL;
1265 
1266  if (uuid == NULL || strlen(uuid) == 0
1267  || client_name == NULL || strlen(client_name) == 0
1268  || major_version == NULL || strlen(major_version) == 0
1269  || minor_version == NULL || strlen(minor_version) == 0) {
1270  crm_err("Missing fields, Hello message will not be valid.");
1271  return NULL;
1272  }
1273 
1274  hello_node = create_xml_node(NULL, XML_TAG_OPTIONS);
1275  crm_xml_add(hello_node, "major_version", major_version);
1276  crm_xml_add(hello_node, "minor_version", minor_version);
1277  crm_xml_add(hello_node, "client_name", client_name);
1278  crm_xml_add(hello_node, "client_uuid", uuid);
1279 
1280  crm_trace("creating hello message");
1281  hello = create_request(CRM_OP_HELLO, hello_node, NULL, NULL, client_name, uuid);
1282  free_xml(hello_node);
1283 
1284  return hello;
1285 }
#define F_CRM_TASK
Definition: msg_xml.h:56
const char * crm_ipc_buffer(crm_ipc_t *client)
Definition: ipc.c:1021
#define F_CRM_REFERENCE
Definition: msg_xml.h:62
void crm_write_blackbox(int nsig, struct qb_log_callsite *callsite)
Definition: logging.c:419
A dumping ground.
#define F_TYPE
Definition: msg_xml.h:34
void crm_ipc_close(crm_ipc_t *client)
Definition: ipc.c:829
#define crm_notice(fmt, args...)
Definition: logging.h:250
char * crm_generate_uuid(void)
Definition: utils.c:2078
uint32_t crm_ipc_buffer_flags(crm_ipc_t *client)
Definition: ipc.c:1028
int crm_ipc_send(crm_ipc_t *client, xmlNode *message, enum crm_ipc_flags flags, int32_t ms_timeout, xmlNode **reply)
Definition: ipc.c:1124
#define F_CRM_HOST_TO
Definition: msg_xml.h:57
#define XML_TAG_OPTIONS
Definition: msg_xml.h:120
const char * pcmk_strerror(int rc)
Definition: logging.c:1128
crm_client_t * crm_client_get(qb_ipcs_connection_t *c)
Definition: ipc.c:204
uint32_t flags
Definition: ipcs.h:79
qb_ipcs_connection_t * ipcs
Definition: ipcs.h:90
#define F_CRM_MSG_TYPE
Definition: msg_xml.h:58
uint32_t size
Definition: internal.h:52
int request_id
Definition: ipcs.h:78
#define CRM_FEATURE_SET
Definition: crm.h:36
#define F_CRM_HOST_FROM
Definition: msg_xml.h:61
#define pcmk_ok
Definition: error.h:42
#define T_CRM
Definition: msg_xml.h:46
crm_client_t * crm_client_get_by_id(const char *id)
Definition: ipc.c:215
xmlNode * create_reply_adv(xmlNode *original_request, xmlNode *xml_response_data, const char *origin)
Definition: ipc.c:147
char * buffer
Definition: ipcs.h:43
bool crm_ipc_connect(crm_ipc_t *client)
Establish an IPC connection to a Pacemaker component.
Definition: ipc.c:798
int crm_parse_int(const char *text, const char *default_text)
Definition: strings.c:125
#define PCMK_IPC_VERSION
Definition: ipc.c:38
struct crm_remote_s * remote
Definition: ipcs.h:92
int crm_user_lookup(const char *name, uid_t *uid, gid_t *gid)
Definition: utils.c:413
#define CRM_LOG_ASSERT(expr)
Definition: logging.h:150
void crm_client_destroy(crm_client_t *c)
Definition: ipc.c:343
int crm_ipc_get_fd(crm_ipc_t *client)
Definition: ipc.c:867
void crm_client_init(void)
Definition: ipc.c:249
#define clear_bit(word, bit)
Definition: crm_internal.h:192
void crm_client_disconnect_all(qb_ipcs_service_t *service)
Definition: ipc.c:271
ssize_t crm_ipc_prepare(uint32_t request, xmlNode *message, struct iovec **result, uint32_t max_send_size)
Definition: ipc.c:534
char * user
Definition: ipcs.h:74
ssize_t crm_ipcs_flush_events(crm_client_t *c)
Definition: ipc.c:467
xmlNode * string2xml(const char *input)
Definition: xml.c:2696
char version[256]
Definition: plugin.c:84
#define MAX_MSG_SIZE
Definition: ipc.c:729
#define XML_ATTR_REQUEST
Definition: msg_xml.h:125
ssize_t crm_ipcs_sendv(crm_client_t *c, struct iovec *iov, enum crm_ipc_flags flags)
Definition: ipc.c:613
#define crm_warn(fmt, args...)
Definition: logging.h:249
crm_client_t * crm_client_new(qb_ipcs_connection_t *c, uid_t uid_client, gid_t gid_client)
Definition: ipc.c:294
#define crm_debug(fmt, args...)
Definition: logging.h:253
#define F_CRM_SYS_TO
Definition: msg_xml.h:59
struct crm_ipc_s crm_ipc_t
Definition: ipc.h:61
const char * crm_ipc_name(crm_ipc_t *client)
Definition: ipc.c:1042
GList * event_queue
Definition: ipcs.h:83
GHashTable * client_connections
Definition: ipc.c:201
unsigned int crm_ipc_default_buffer_size(void)
Definition: ipc.c:64
#define crm_trace(fmt, args...)
Definition: logging.h:254
void crm_ipc_destroy(crm_ipc_t *client)
Definition: ipc.c:844
xmlNode * create_xml_node(xmlNode *parent, const char *name)
Definition: xml.c:2532
const char * crm_element_value(xmlNode *data, const char *name)
Definition: xml.c:4987
#define CRM_DAEMON_USER
Definition: config.h:47
gboolean add_message_xml(xmlNode *msg, const char *field, xmlNode *xml)
Definition: xml.c:3072
void free_xml(xmlNode *child)
Definition: xml.c:2587
void crm_ipcs_send_ack(crm_client_t *c, uint32_t request, uint32_t flags, const char *tag, const char *function, int line)
Definition: ipc.c:711
xmlNode * crm_ipcs_recv(crm_client_t *c, void *data, size_t size, uint32_t *id, uint32_t *flags)
Definition: ipc.c:400
int auth_timeout
Definition: ipcs.h:46
#define F_CRM_DATA
Definition: msg_xml.h:55
const char * crm_xml_add(xmlNode *node, const char *name, const char *value)
Definition: xml.c:2434
const char * crm_xml_add_int(xmlNode *node, const char *name, int value)
Definition: xml.c:2522
bool crm_compress_string(const char *data, int length, int max, char **result, unsigned int *result_len)
Definition: strings.c:311
ssize_t crm_ipcs_send(crm_client_t *c, uint32_t request, xmlNode *message, enum crm_ipc_flags flags)
Definition: ipc.c:686
uint pid
Definition: ipcs.h:67
int event_timer
Definition: ipcs.h:82
#define crm_perror(level, fmt, args...)
Log a system error message.
Definition: logging.h:226
xmlNode * create_hello_message(const char *uuid, const char *client_name, const char *major_version, const char *minor_version)
Definition: ipc.c:1260
#define CRM_OP_HELLO
Definition: crm.h:112
#define crm_err(fmt, args...)
Definition: logging.h:248
const char * bz2_strerror(int rc)
Definition: logging.c:1191
#define F_CRM_SYS_FROM
Definition: msg_xml.h:60
#define crm_log_xml_notice(xml, text)
Definition: logging.h:259
char * dump_xml_unformatted(xmlNode *msg)
Definition: xml.c:3726
int crm_ipc_ready(crm_ipc_t *client)
Check whether an IPC connection is ready to be read.
Definition: ipc.c:913
#define uint32_t
Definition: stdint.in.h:158
#define XML_ATTR_RESPONSE
Definition: msg_xml.h:126
#define CRM_ASSERT(expr)
Definition: error.h:35
char data[0]
Definition: internal.h:58
long crm_ipc_read(crm_ipc_t *client)
Definition: ipc.c:975
char * id
Definition: ipcs.h:72
#define uint8_t
Definition: stdint.in.h:144
Wrappers for and extensions to libqb IPC.
char * generate_hash_key(const char *crm_msg_reference, const char *sys)
Definition: utils.c:403
#define F_CRM_ORIGIN
Definition: msg_xml.h:64
int crm_ipcs_client_pid(qb_ipcs_connection_t *c)
Definition: ipc.c:390
#define crm_log_xml_trace(xml, text)
Definition: logging.h:262
void crm_client_cleanup(void)
Definition: ipc.c:258
enum client_type kind
Definition: ipcs.h:88
const char * crm_client_name(crm_client_t *c)
Definition: ipc.c:235
bool crm_ipc_connected(crm_ipc_t *client)
Definition: ipc.c:881
crm_ipc_t * crm_ipc_new(const char *name, size_t max_size)
Definition: ipc.c:770
char * name
Definition: ipcs.h:73
crm_ipc_flags
Definition: ipc.h:41
xmlNode * create_request_adv(const char *task, xmlNode *msg_data, const char *host_to, const char *sys_to, const char *sys_from, const char *uuid_from, const char *origin)
Definition: ipc.c:102
#define create_request(task, xml_data, host_to, sys_to, sys_from, uuid_from)
Definition: ipc.h:34
char * uid2username(uid_t uid)
#define F_CRM_VERSION
Definition: msg_xml.h:63
uint64_t flags
Definition: remote.c:121
#define MIN_MSG_SIZE
Definition: ipc.c:728
enum crm_ais_msg_types type
Definition: internal.h:51
#define int32_t
Definition: stdint.in.h:157