pacemaker  1.1.14-70404b0
Scalable High-Availability cluster resource manager
ipc.c
Go to the documentation of this file.
1 /*
2  * Copyright 2004-2019 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 #if defined(US_AUTH_PEERCRED_UCRED) || defined(US_AUTH_PEERCRED_SOCKPEERCRED)
13 # ifdef US_AUTH_PEERCRED_UCRED
14 # ifndef _GNU_SOURCE
15 # define _GNU_SOURCE
16 # endif
17 # endif
18 # include <sys/socket.h>
19 #elif defined(US_AUTH_GETPEERUCRED)
20 # include <ucred.h>
21 #endif
22 
23 #include <sys/param.h>
24 
25 #include <stdio.h>
26 #include <sys/types.h>
27 #include <sys/stat.h>
28 #include <unistd.h>
29 #include <grp.h>
30 
31 #include <errno.h>
32 #include <fcntl.h>
33 #include <bzlib.h>
34 
35 #include <crm/crm.h> /* indirectly: pcmk_err_generic */
36 #include <crm/msg_xml.h>
37 #include <crm/common/ipc.h>
38 #include <crm/common/ipcs.h>
39 
40 #include <crm/common/ipc_internal.h> /* PCMK__SPECIAL_PID* */
41 
42 #define PCMK_IPC_VERSION 1
43 
44 struct crm_ipc_response_header {
45  struct qb_ipc_response_header qb;
46  uint32_t size_uncompressed;
47  uint32_t size_compressed;
49  uint8_t version; /* Protect against version changes for anyone that might bother to statically link us */
50 };
51 
52 static int hdr_offset = 0;
53 static unsigned int ipc_buffer_max = 0;
54 static unsigned int pick_ipc_buffer(unsigned int max);
55 
56 static inline void
57 crm_ipc_init(void)
58 {
59  if (hdr_offset == 0) {
60  hdr_offset = sizeof(struct crm_ipc_response_header);
61  }
62  if (ipc_buffer_max == 0) {
63  ipc_buffer_max = pick_ipc_buffer(0);
64  }
65 }
66 
67 unsigned int
69 {
70  return pick_ipc_buffer(0);
71 }
72 
73 static char *
74 generateReference(const char *custom1, const char *custom2)
75 {
76  static uint ref_counter = 0;
77  const char *local_cust1 = custom1;
78  const char *local_cust2 = custom2;
79  int reference_len = 4;
80  char *since_epoch = NULL;
81 
82  reference_len += 20; /* too big */
83  reference_len += 40; /* too big */
84 
85  if (local_cust1 == NULL) {
86  local_cust1 = "_empty_";
87  }
88  reference_len += strlen(local_cust1);
89 
90  if (local_cust2 == NULL) {
91  local_cust2 = "_empty_";
92  }
93  reference_len += strlen(local_cust2);
94 
95  since_epoch = calloc(1, reference_len);
96 
97  if (since_epoch != NULL) {
98  sprintf(since_epoch, "%s-%s-%lu-%u",
99  local_cust1, local_cust2, (unsigned long)time(NULL), ref_counter++);
100  }
101 
102  return since_epoch;
103 }
104 
105 xmlNode *
106 create_request_adv(const char *task, xmlNode * msg_data,
107  const char *host_to, const char *sys_to,
108  const char *sys_from, const char *uuid_from, const char *origin)
109 {
110  char *true_from = NULL;
111  xmlNode *request = NULL;
112  char *reference = generateReference(task, sys_from);
113 
114  if (uuid_from != NULL) {
115  true_from = generate_hash_key(sys_from, uuid_from);
116  } else if (sys_from != NULL) {
117  true_from = strdup(sys_from);
118  } else {
119  crm_err("No sys from specified");
120  }
121 
122  /* host_from will get set for us if necessary by CRMd when routed */
123  request = create_xml_node(NULL, __FUNCTION__);
124  crm_xml_add(request, F_CRM_ORIGIN, origin);
125  crm_xml_add(request, F_TYPE, T_CRM);
128  crm_xml_add(request, F_CRM_REFERENCE, reference);
129  crm_xml_add(request, F_CRM_TASK, task);
130  crm_xml_add(request, F_CRM_SYS_TO, sys_to);
131  crm_xml_add(request, F_CRM_SYS_FROM, true_from);
132 
133  /* HOSTTO will be ignored if it is to the DC anyway. */
134  if (host_to != NULL && strlen(host_to) > 0) {
135  crm_xml_add(request, F_CRM_HOST_TO, host_to);
136  }
137 
138  if (msg_data != NULL) {
139  add_message_xml(request, F_CRM_DATA, msg_data);
140  }
141  free(reference);
142  free(true_from);
143 
144  return request;
145 }
146 
147 /*
148  * This method adds a copy of xml_response_data
149  */
150 xmlNode *
151 create_reply_adv(xmlNode * original_request, xmlNode * xml_response_data, const char *origin)
152 {
153  xmlNode *reply = NULL;
154 
155  const char *host_from = crm_element_value(original_request, F_CRM_HOST_FROM);
156  const char *sys_from = crm_element_value(original_request, F_CRM_SYS_FROM);
157  const char *sys_to = crm_element_value(original_request, F_CRM_SYS_TO);
158  const char *type = crm_element_value(original_request, F_CRM_MSG_TYPE);
159  const char *operation = crm_element_value(original_request, F_CRM_TASK);
160  const char *crm_msg_reference = crm_element_value(original_request, F_CRM_REFERENCE);
161 
162  if (type == NULL) {
163  crm_err("Cannot create new_message, no message type in original message");
164  CRM_ASSERT(type != NULL);
165  return NULL;
166 #if 0
167  } else if (strcasecmp(XML_ATTR_REQUEST, type) != 0) {
168  crm_err("Cannot create new_message, original message was not a request");
169  return NULL;
170 #endif
171  }
172  reply = create_xml_node(NULL, __FUNCTION__);
173  if (reply == NULL) {
174  crm_err("Cannot create new_message, malloc failed");
175  return NULL;
176  }
177 
178  crm_xml_add(reply, F_CRM_ORIGIN, origin);
179  crm_xml_add(reply, F_TYPE, T_CRM);
182  crm_xml_add(reply, F_CRM_REFERENCE, crm_msg_reference);
183  crm_xml_add(reply, F_CRM_TASK, operation);
184 
185  /* since this is a reply, we reverse the from and to */
186  crm_xml_add(reply, F_CRM_SYS_TO, sys_from);
187  crm_xml_add(reply, F_CRM_SYS_FROM, sys_to);
188 
189  /* HOSTTO will be ignored if it is to the DC anyway. */
190  if (host_from != NULL && strlen(host_from) > 0) {
191  crm_xml_add(reply, F_CRM_HOST_TO, host_from);
192  }
193 
194  if (xml_response_data != NULL) {
195  add_message_xml(reply, F_CRM_DATA, xml_response_data);
196  }
197 
198  return reply;
199 }
200 
201 /* Libqb based IPC */
202 
203 /* Server... */
204 
205 GHashTable *client_connections = NULL;
206 
207 crm_client_t *
208 crm_client_get(qb_ipcs_connection_t * c)
209 {
210  if (client_connections) {
211  return g_hash_table_lookup(client_connections, c);
212  }
213 
214  crm_trace("No client found for %p", c);
215  return NULL;
216 }
217 
218 crm_client_t *
219 crm_client_get_by_id(const char *id)
220 {
221  gpointer key;
222  crm_client_t *client;
223  GHashTableIter iter;
224 
225  if (client_connections && id) {
226  g_hash_table_iter_init(&iter, client_connections);
227  while (g_hash_table_iter_next(&iter, &key, (gpointer *) & client)) {
228  if (strcmp(client->id, id) == 0) {
229  return client;
230  }
231  }
232  }
233 
234  crm_trace("No client found with id=%s", id);
235  return NULL;
236 }
237 
238 const char *
240 {
241  if (c == NULL) {
242  return "null";
243  } else if (c->name == NULL && c->id == NULL) {
244  return "unknown";
245  } else if (c->name == NULL) {
246  return c->id;
247  } else {
248  return c->name;
249  }
250 }
251 
252 void
254 {
255  if (client_connections == NULL) {
256  crm_trace("Creating client hash table");
257  client_connections = g_hash_table_new(g_direct_hash, g_direct_equal);
258  }
259 }
260 
261 void
263 {
264  if (client_connections != NULL) {
265  int active = g_hash_table_size(client_connections);
266 
267  if (active) {
268  crm_err("Exiting with %d active connections", active);
269  }
270  g_hash_table_destroy(client_connections); client_connections = NULL;
271  }
272 }
273 
274 void
275 crm_client_disconnect_all(qb_ipcs_service_t *service)
276 {
277  qb_ipcs_connection_t *c = NULL;
278 
279  if (service == NULL) {
280  return;
281  }
282 
283  c = qb_ipcs_connection_first_get(service);
284 
285  while (c != NULL) {
286  qb_ipcs_connection_t *last = c;
287 
288  c = qb_ipcs_connection_next_get(service, last);
289 
290  /* There really shouldn't be anyone connected at this point */
291  crm_notice("Disconnecting client %p, pid=%d...", last, crm_ipcs_client_pid(last));
292  qb_ipcs_disconnect(last);
293  qb_ipcs_connection_unref(last);
294  }
295 }
296 
297 crm_client_t *
298 crm_client_new(qb_ipcs_connection_t * c, uid_t uid_client, gid_t gid_client)
299 {
300  static gid_t gid_cluster = 0;
301 
302  crm_client_t *client = NULL;
303 
304  CRM_LOG_ASSERT(c);
305  if (c == NULL) {
306  return NULL;
307  }
308 
309  if (gid_cluster == 0) {
310  if(crm_user_lookup(CRM_DAEMON_USER, NULL, &gid_cluster) < 0) {
311  static bool have_error = FALSE;
312  if(have_error == FALSE) {
313  crm_warn("Could not find group for user %s", CRM_DAEMON_USER);
314  have_error = TRUE;
315  }
316  }
317  }
318 
319  if (uid_client != 0) {
320  crm_trace("Giving access to group %u", gid_cluster);
321  /* Passing -1 to chown(2) means don't change */
322  qb_ipcs_connection_auth_set(c, -1, gid_cluster, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
323  }
324 
325  crm_client_init();
326 
327  /* TODO: Do our own auth checking, return NULL if unauthorized */
328  client = calloc(1, sizeof(crm_client_t));
329 
330  client->ipcs = c;
331  client->kind = CRM_CLIENT_IPC;
332  client->pid = crm_ipcs_client_pid(c);
333 
334  client->id = crm_generate_uuid();
335 
336  crm_debug("Connecting %p for uid=%d gid=%d pid=%u id=%s", c, uid_client, gid_client, client->pid, client->id);
337 
338 #if ENABLE_ACL
339  client->user = uid2username(uid_client);
340 #endif
341 
342  g_hash_table_insert(client_connections, c, client);
343  return client;
344 }
345 
346 void
348 {
349  if (c == NULL) {
350  return;
351  }
352 
353  if (client_connections) {
354  if (c->ipcs) {
355  crm_trace("Destroying %p/%p (%d remaining)",
356  c, c->ipcs, crm_hash_table_size(client_connections) - 1);
357  g_hash_table_remove(client_connections, c->ipcs);
358 
359  } else {
360  crm_trace("Destroying remote connection %p (%d remaining)",
361  c, crm_hash_table_size(client_connections) - 1);
362  g_hash_table_remove(client_connections, c->id);
363  }
364  }
365 
366  if (c->event_timer) {
367  g_source_remove(c->event_timer);
368  }
369 
370  crm_debug("Destroying %d events", g_list_length(c->event_queue));
371  while (c->event_queue) {
372  struct iovec *event = c->event_queue->data;
373 
374  c->event_queue = g_list_remove(c->event_queue, event);
375  free(event[0].iov_base);
376  free(event[1].iov_base);
377  free(event);
378  }
379 
380  free(c->id);
381  free(c->name);
382  free(c->user);
383  if (c->remote) {
384  if (c->remote->auth_timeout) {
385  g_source_remove(c->remote->auth_timeout);
386  }
387  free(c->remote->buffer);
388  free(c->remote);
389  }
390  free(c);
391 }
392 
393 int
394 crm_ipcs_client_pid(qb_ipcs_connection_t * c)
395 {
396  struct qb_ipcs_connection_stats stats;
397 
398  stats.client_pid = 0;
399  qb_ipcs_connection_stats_get(c, &stats, 0);
400  return stats.client_pid;
401 }
402 
403 xmlNode *
405 {
406  xmlNode *xml = NULL;
407  char *uncompressed = NULL;
408  char *text = ((char *)data) + sizeof(struct crm_ipc_response_header);
409  struct crm_ipc_response_header *header = data;
410 
411  if (id) {
412  *id = ((struct qb_ipc_response_header *)data)->id;
413  }
414  if (flags) {
415  *flags = header->flags;
416  }
417 
418  if (is_set(header->flags, crm_ipc_proxied)) {
419  /* mark this client as being the endpoint of a proxy connection.
420  * Proxy connections responses are sent on the event channel to avoid
421  * blocking the proxy daemon (crmd) */
423  }
424 
425  if(header->version > PCMK_IPC_VERSION) {
426  crm_err("Filtering incompatible v%d IPC message, we only support versions <= %d",
427  header->version, PCMK_IPC_VERSION);
428  return NULL;
429  }
430 
431  if (header->size_compressed) {
432  int rc = 0;
433  unsigned int size_u = 1 + header->size_uncompressed;
434  uncompressed = calloc(1, size_u);
435 
436  crm_trace("Decompressing message data %u bytes into %u bytes",
437  header->size_compressed, size_u);
438 
439  rc = BZ2_bzBuffToBuffDecompress(uncompressed, &size_u, text, header->size_compressed, 1, 0);
440  text = uncompressed;
441 
442  if (rc != BZ_OK) {
443  crm_err("Decompression failed: %s (%d)", bz2_strerror(rc), rc);
444  free(uncompressed);
445  return NULL;
446  }
447  }
448 
449  CRM_ASSERT(text[header->size_uncompressed - 1] == 0);
450 
451  crm_trace("Received %.200s", text);
452  xml = string2xml(text);
453 
454  free(uncompressed);
455  return xml;
456 }
457 
459 
460 static gboolean
461 crm_ipcs_flush_events_cb(gpointer data)
462 {
463  crm_client_t *c = data;
464 
465  c->event_timer = 0;
467  return FALSE;
468 }
469 
470 ssize_t
472 {
473  int sent = 0;
474  ssize_t rc = 0;
475  int queue_len = 0;
476 
477  if (c == NULL) {
478  return pcmk_ok;
479 
480  } else if (c->event_timer) {
481  /* There is already a timer, wait until it goes off */
482  crm_trace("Timer active for %p - %d", c->ipcs, c->event_timer);
483  return pcmk_ok;
484  }
485 
486  queue_len = g_list_length(c->event_queue);
487  while (c->event_queue && sent < 100) {
488  struct crm_ipc_response_header *header = NULL;
489  struct iovec *event = c->event_queue->data;
490 
491  rc = qb_ipcs_event_sendv(c->ipcs, event, 2);
492  if (rc < 0) {
493  break;
494  }
495 
496  sent++;
497  header = event[0].iov_base;
498  if (header->size_compressed) {
499  crm_trace("Event %d to %p[%d] (%d compressed bytes) sent",
500  header->qb.id, c->ipcs, c->pid, rc);
501  } else {
502  crm_trace("Event %d to %p[%d] (%d bytes) sent: %.120s",
503  header->qb.id, c->ipcs, c->pid, rc, event[1].iov_base);
504  }
505 
506  c->event_queue = g_list_remove(c->event_queue, event);
507  free(event[0].iov_base);
508  free(event[1].iov_base);
509  free(event);
510  }
511 
512  queue_len -= sent;
513  if (sent > 0 || c->event_queue) {
514  crm_trace("Sent %d events (%d remaining) for %p[%d]: %s (%d)",
515  sent, queue_len, c->ipcs, c->pid, pcmk_strerror(rc < 0 ? rc : 0), rc);
516  }
517 
518  if (c->event_queue) {
519  if (queue_len % 100 == 0 && queue_len > 99) {
520  crm_warn("Event queue for %p[%d] has grown to %d", c->ipcs, c->pid, queue_len);
521 
522  } else if (queue_len > 500) {
523  crm_err("Evicting slow client %p[%d]: event queue reached %d entries",
524  c->ipcs, c->pid, queue_len);
525  qb_ipcs_disconnect(c->ipcs);
526  return rc;
527  }
528 
529  c->event_timer = g_timeout_add(1000 + 100 * queue_len, crm_ipcs_flush_events_cb, c);
530  }
531 
532  return rc;
533 }
534 
535 ssize_t
536 crm_ipc_prepare(uint32_t request, xmlNode * message, struct iovec ** result, uint32_t max_send_size)
537 {
538  static unsigned int biggest = 0;
539  struct iovec *iov;
540  unsigned int total = 0;
541  char *compressed = NULL;
542  char *buffer = dump_xml_unformatted(message);
543  struct crm_ipc_response_header *header = calloc(1, sizeof(struct crm_ipc_response_header));
544 
545  CRM_ASSERT(result != NULL);
546 
547  crm_ipc_init();
548 
549  if (max_send_size == 0) {
550  max_send_size = ipc_buffer_max;
551  }
552 
553  CRM_LOG_ASSERT(max_send_size != 0);
554 
555  *result = NULL;
556  iov = calloc(2, sizeof(struct iovec));
557 
558 
559  iov[0].iov_len = hdr_offset;
560  iov[0].iov_base = header;
561 
562  header->version = PCMK_IPC_VERSION;
563  header->size_uncompressed = 1 + strlen(buffer);
564  total = iov[0].iov_len + header->size_uncompressed;
565 
566  if (total < max_send_size) {
567  iov[1].iov_base = buffer;
568  iov[1].iov_len = header->size_uncompressed;
569 
570  } else {
571  unsigned int new_size = 0;
572 
574  (buffer, header->size_uncompressed, max_send_size, &compressed, &new_size)) {
575 
576  header->flags |= crm_ipc_compressed;
577  header->size_compressed = new_size;
578 
579  iov[1].iov_len = header->size_compressed;
580  iov[1].iov_base = compressed;
581 
582  free(buffer);
583 
584  biggest = QB_MAX(header->size_compressed, biggest);
585 
586  } else {
587  ssize_t rc = -EMSGSIZE;
588 
589  crm_log_xml_trace(message, "EMSGSIZE");
590  biggest = QB_MAX(header->size_uncompressed, biggest);
591 
592  crm_err
593  ("Could not compress the message (%u bytes) into less than the configured ipc limit (%u bytes). "
594  "Set PCMK_ipc_buffer to a higher value (%u bytes suggested)",
595  header->size_uncompressed, max_send_size, 4 * biggest);
596 
597  free(compressed);
598  free(buffer);
599  free(header);
600  free(iov);
601 
602  return rc;
603  }
604  }
605 
606  header->qb.size = iov[0].iov_len + iov[1].iov_len;
607  header->qb.id = (int32_t)request; /* Replying to a specific request */
608 
609  *result = iov;
610  CRM_ASSERT(header->qb.size > 0);
611  return header->qb.size;
612 }
613 
614 ssize_t
615 crm_ipcs_sendv(crm_client_t * c, struct iovec * iov, enum crm_ipc_flags flags)
616 {
617  ssize_t rc;
618  static uint32_t id = 1;
619  struct crm_ipc_response_header *header = iov[0].iov_base;
620 
622  /* _ALL_ replies to proxied connections need to be sent as events */
623  if (is_not_set(flags, crm_ipc_server_event)) {
624  flags |= crm_ipc_server_event;
625  /* this flag lets us know this was originally meant to be a response.
626  * even though we're sending it over the event channel. */
628  }
629  }
630 
631  header->flags |= flags;
632  if (flags & crm_ipc_server_event) {
633  header->qb.id = id++; /* We don't really use it, but doesn't hurt to set one */
634 
635  if (flags & crm_ipc_server_free) {
636  crm_trace("Sending the original to %p[%d]", c->ipcs, c->pid);
637  c->event_queue = g_list_append(c->event_queue, iov);
638 
639  } else {
640  struct iovec *iov_copy = calloc(2, sizeof(struct iovec));
641 
642  crm_trace("Sending a copy to %p[%d]", c->ipcs, c->pid);
643  iov_copy[0].iov_len = iov[0].iov_len;
644  iov_copy[0].iov_base = malloc(iov[0].iov_len);
645  memcpy(iov_copy[0].iov_base, iov[0].iov_base, iov[0].iov_len);
646 
647  iov_copy[1].iov_len = iov[1].iov_len;
648  iov_copy[1].iov_base = malloc(iov[1].iov_len);
649  memcpy(iov_copy[1].iov_base, iov[1].iov_base, iov[1].iov_len);
650 
651  c->event_queue = g_list_append(c->event_queue, iov_copy);
652  }
653 
654  } else {
655  CRM_LOG_ASSERT(header->qb.id != 0); /* Replying to a specific request */
656 
657  rc = qb_ipcs_response_sendv(c->ipcs, iov, 2);
658  if (rc < header->qb.size) {
659  crm_notice("Response %d to %p[%d] (%u bytes) failed: %s (%d)",
660  header->qb.id, c->ipcs, c->pid, header->qb.size, pcmk_strerror(rc), rc);
661 
662  } else {
663  crm_trace("Response %d sent, %d bytes to %p[%d]", header->qb.id, rc, c->ipcs, c->pid);
664  }
665 
666  if (flags & crm_ipc_server_free) {
667  free(iov[0].iov_base);
668  free(iov[1].iov_base);
669  free(iov);
670  }
671  }
672 
673  if (flags & crm_ipc_server_event) {
674  rc = crm_ipcs_flush_events(c);
675  } else {
677  }
678 
679  if (rc == -EPIPE || rc == -ENOTCONN) {
680  crm_trace("Client %p disconnected", c->ipcs);
681  }
682 
683  return rc;
684 }
685 
686 ssize_t
687 crm_ipcs_send(crm_client_t * c, uint32_t request, xmlNode * message,
688  enum crm_ipc_flags flags)
689 {
690  struct iovec *iov = NULL;
691  ssize_t rc = 0;
692 
693  if(c == NULL) {
694  return -EDESTADDRREQ;
695  }
696  crm_ipc_init();
697 
698  rc = crm_ipc_prepare(request, message, &iov, ipc_buffer_max);
699  if (rc > 0) {
700  rc = crm_ipcs_sendv(c, iov, flags | crm_ipc_server_free);
701 
702  } else {
703  free(iov);
704  crm_notice("Message to %p[%d] failed: %s (%d)",
705  c->ipcs, c->pid, pcmk_strerror(rc), rc);
706  }
707 
708  return rc;
709 }
710 
711 void
712 crm_ipcs_send_ack(crm_client_t * c, uint32_t request, uint32_t flags, const char *tag, const char *function,
713  int line)
714 {
715  if (flags & crm_ipc_client_response) {
716  xmlNode *ack = create_xml_node(NULL, tag);
717 
718  crm_trace("Ack'ing msg from %s (%p)", crm_client_name(c), c);
719  c->request_id = 0;
720  crm_xml_add(ack, "function", function);
721  crm_xml_add_int(ack, "line", line);
722  crm_ipcs_send(c, request, ack, flags);
723  free_xml(ack);
724  }
725 }
726 
727 /* Client... */
728 
729 #define MIN_MSG_SIZE 12336 /* sizeof(struct qb_ipc_connection_response) */
730 #define MAX_MSG_SIZE 128*1024 /* 128k default */
731 
732 struct crm_ipc_s {
733  struct pollfd pfd;
734 
735  /* the max size we can send/receive over ipc */
736  unsigned int max_buf_size;
737  /* Size of the allocated 'buffer' */
738  unsigned int buf_size;
739  int msg_size;
740  int need_reply;
741  char *buffer;
742  char *name;
743  uint32_t buffer_flags;
744 
745  qb_ipcc_connection_t *ipc;
746 
747 };
748 
749 static unsigned int
750 pick_ipc_buffer(unsigned int max)
751 {
752  static unsigned int global_max = 0;
753 
754  if(global_max == 0) {
755  const char *env = getenv("PCMK_ipc_buffer");
756 
757  if (env) {
758  int env_max = crm_parse_int(env, "0");
759 
760  global_max = (env_max > 0)? env_max : MAX_MSG_SIZE;
761 
762  } else {
763  global_max = MAX_MSG_SIZE;
764  }
765  }
766 
767  return QB_MAX(max, global_max);
768 }
769 
770 crm_ipc_t *
771 crm_ipc_new(const char *name, size_t max_size)
772 {
773  crm_ipc_t *client = NULL;
774 
775  client = calloc(1, sizeof(crm_ipc_t));
776 
777  client->name = strdup(name);
778  client->buf_size = pick_ipc_buffer(max_size);
779  client->buffer = malloc(client->buf_size);
780 
781  /* Clients initiating connection pick the max buf size */
782  client->max_buf_size = client->buf_size;
783 
784  client->pfd.fd = -1;
785  client->pfd.events = POLLIN;
786  client->pfd.revents = 0;
787 
788  return client;
789 }
790 
800 bool
802 {
803  static uid_t cl_uid = 0;
804  static gid_t cl_gid = 0;
805  pid_t found_pid = 0; uid_t found_uid = 0; gid_t found_gid = 0;
806  int rv;
807 
808  client->need_reply = FALSE;
809  client->ipc = qb_ipcc_connect(client->name, client->buf_size);
810 
811  if (client->ipc == NULL) {
812  crm_debug("Could not establish %s connection: %s (%d)", client->name, pcmk_strerror(errno), errno);
813  return FALSE;
814  }
815 
816  client->pfd.fd = crm_ipc_get_fd(client);
817  if (client->pfd.fd < 0) {
818  rv = errno;
819  /* message already omitted */
820  crm_ipc_close(client);
821  errno = rv;
822  return FALSE;
823  }
824 
825  if (!cl_uid && !cl_gid
826  && (rv = crm_user_lookup(CRM_DAEMON_USER, &cl_uid, &cl_gid)) < 0) {
827  errno = -rv;
828  /* message already omitted */
829  crm_ipc_close(client);
830  errno = -rv;
831  return FALSE;
832  }
833 
834  if (!(rv = crm_ipc_is_authentic_process(client->pfd.fd, cl_uid, cl_gid,
835  &found_pid, &found_uid,
836  &found_gid))) {
837  crm_err("Daemon (IPC %s) is not authentic:"
838  " process %lld (uid: %lld, gid: %lld)",
839  client->name, (long long) PCMK__SPECIAL_PID_AS_0(found_pid),
840  (long long) found_uid, (long long) found_gid);
841  crm_ipc_close(client);
842  errno = ECONNABORTED;
843  return FALSE;
844 
845  } else if (rv < 0) {
846  errno = -rv;
847  crm_perror(LOG_ERR, "Could not verify authenticity of daemon (IPC %s)",
848  client->name);
849  crm_ipc_close(client);
850  errno = -rv;
851  return FALSE;
852  }
853 
854  qb_ipcc_context_set(client->ipc, client);
855 
856 #ifdef HAVE_IPCS_GET_BUFFER_SIZE
857  client->max_buf_size = qb_ipcc_get_buffer_size(client->ipc);
858  if (client->max_buf_size > client->buf_size) {
859  free(client->buffer);
860  client->buffer = calloc(1, client->max_buf_size);
861  client->buf_size = client->max_buf_size;
862  }
863 #endif
864 
865  return TRUE;
866 }
867 
868 void
870 {
871  if (client) {
872  crm_trace("Disconnecting %s IPC connection %p (%p.%p)", client->name, client, client->ipc);
873 
874  if (client->ipc) {
875  qb_ipcc_connection_t *ipc = client->ipc;
876 
877  client->ipc = NULL;
878  qb_ipcc_disconnect(ipc);
879  }
880  }
881 }
882 
883 void
885 {
886  if (client) {
887  if (client->ipc && qb_ipcc_is_connected(client->ipc)) {
888  crm_notice("Destroying an active IPC connection to %s", client->name);
889  /* The next line is basically unsafe
890  *
891  * If this connection was attached to mainloop and mainloop is active,
892  * the 'disconnected' callback will end up back here and we'll end
893  * up free'ing the memory twice - something that can still happen
894  * even without this if we destroy a connection and it closes before
895  * we call exit
896  */
897  /* crm_ipc_close(client); */
898  }
899  crm_trace("Destroying IPC connection to %s: %p", client->name, client);
900  free(client->buffer);
901  free(client->name);
902  free(client);
903  }
904 }
905 
906 int
908 {
909  int fd = 0;
910 
911  if (client && client->ipc && (qb_ipcc_fd_get(client->ipc, &fd) == 0)) {
912  return fd;
913  }
914  errno = EINVAL;
915  crm_perror(LOG_ERR, "Could not obtain file IPC descriptor for %s",
916  (client? client->name : "unspecified client"));
917  return -errno;
918 }
919 
920 bool
922 {
923  bool rc = FALSE;
924 
925  if (client == NULL) {
926  crm_trace("No client");
927  return FALSE;
928 
929  } else if (client->ipc == NULL) {
930  crm_trace("No connection");
931  return FALSE;
932 
933  } else if (client->pfd.fd < 0) {
934  crm_trace("Bad descriptor");
935  return FALSE;
936  }
937 
938  rc = qb_ipcc_is_connected(client->ipc);
939  if (rc == FALSE) {
940  client->pfd.fd = -EINVAL;
941  }
942  return rc;
943 }
944 
945 int
947 {
948  CRM_ASSERT(client != NULL);
949 
950  if (crm_ipc_connected(client) == FALSE) {
951  return -ENOTCONN;
952  }
953 
954  client->pfd.revents = 0;
955  return poll(&(client->pfd), 1, 0);
956 }
957 
958 static int
959 crm_ipc_decompress(crm_ipc_t * client)
960 {
961  struct crm_ipc_response_header *header = (struct crm_ipc_response_header *)(void*)client->buffer;
962 
963  if (header->size_compressed) {
964  int rc = 0;
965  unsigned int size_u = 1 + header->size_uncompressed;
966  /* never let buf size fall below our max size required for ipc reads. */
967  unsigned int new_buf_size = QB_MAX((hdr_offset + size_u), client->max_buf_size);
968  char *uncompressed = calloc(1, new_buf_size);
969 
970  crm_trace("Decompressing message data %u bytes into %u bytes",
971  header->size_compressed, size_u);
972 
973  rc = BZ2_bzBuffToBuffDecompress(uncompressed + hdr_offset, &size_u,
974  client->buffer + hdr_offset, header->size_compressed, 1, 0);
975 
976  if (rc != BZ_OK) {
977  crm_err("Decompression failed: %s (%d)", bz2_strerror(rc), rc);
978  free(uncompressed);
979  return -EILSEQ;
980  }
981 
982  /*
983  * This assert no longer holds true. For an identical msg, some clients may
984  * require compression, and others may not. If that same msg (event) is sent
985  * to multiple clients, it could result in some clients receiving a compressed
986  * msg even though compression was not explicitly required for them.
987  *
988  * CRM_ASSERT((header->size_uncompressed + hdr_offset) >= ipc_buffer_max);
989  */
990  CRM_ASSERT(size_u == header->size_uncompressed);
991 
992  memcpy(uncompressed, client->buffer, hdr_offset); /* Preserve the header */
993  header = (struct crm_ipc_response_header *)(void*)uncompressed;
994 
995  free(client->buffer);
996  client->buf_size = new_buf_size;
997  client->buffer = uncompressed;
998  }
999 
1000  CRM_ASSERT(client->buffer[hdr_offset + header->size_uncompressed - 1] == 0);
1001  return pcmk_ok;
1002 }
1003 
1004 long
1006 {
1007  struct crm_ipc_response_header *header = NULL;
1008 
1009  CRM_ASSERT(client != NULL);
1010  CRM_ASSERT(client->ipc != NULL);
1011  CRM_ASSERT(client->buffer != NULL);
1012 
1013  crm_ipc_init();
1014 
1015  client->buffer[0] = 0;
1016  client->msg_size = qb_ipcc_event_recv(client->ipc, client->buffer, client->buf_size - 1, 0);
1017  if (client->msg_size >= 0) {
1018  int rc = crm_ipc_decompress(client);
1019 
1020  if (rc != pcmk_ok) {
1021  return rc;
1022  }
1023 
1024  header = (struct crm_ipc_response_header *)(void*)client->buffer;
1025  if(header->version > PCMK_IPC_VERSION) {
1026  crm_err("Filtering incompatible v%d IPC message, we only support versions <= %d",
1027  header->version, PCMK_IPC_VERSION);
1028  return -EBADMSG;
1029  }
1030 
1031  crm_trace("Received %s event %d, size=%u, rc=%d, text: %.100s",
1032  client->name, header->qb.id, header->qb.size, client->msg_size,
1033  client->buffer + hdr_offset);
1034 
1035  } else {
1036  crm_trace("No message from %s received: %s", client->name, pcmk_strerror(client->msg_size));
1037  }
1038 
1039  if (crm_ipc_connected(client) == FALSE || client->msg_size == -ENOTCONN) {
1040  crm_err("Connection to %s failed", client->name);
1041  }
1042 
1043  if (header) {
1044  /* Data excluding the header */
1045  return header->size_uncompressed;
1046  }
1047  return -ENOMSG;
1048 }
1049 
1050 const char *
1052 {
1053  CRM_ASSERT(client != NULL);
1054  return client->buffer + sizeof(struct crm_ipc_response_header);
1055 }
1056 
1057 uint32_t
1059 {
1060  struct crm_ipc_response_header *header = NULL;
1061 
1062  CRM_ASSERT(client != NULL);
1063  if (client->buffer == NULL) {
1064  return 0;
1065  }
1066 
1067  header = (struct crm_ipc_response_header *)(void*)client->buffer;
1068  return header->flags;
1069 }
1070 
1071 const char *
1073 {
1074  CRM_ASSERT(client != NULL);
1075  return client->name;
1076 }
1077 
1078 static int
1079 internal_ipc_send_recv(crm_ipc_t * client, const void *iov)
1080 {
1081  int rc = 0;
1082 
1083  do {
1084  rc = qb_ipcc_sendv_recv(client->ipc, iov, 2, client->buffer, client->buf_size, -1);
1085  } while (rc == -EAGAIN && crm_ipc_connected(client));
1086 
1087  return rc;
1088 }
1089 
1090 static int
1091 internal_ipc_send_request(crm_ipc_t * client, const void *iov, int ms_timeout)
1092 {
1093  int rc = 0;
1094  time_t timeout = time(NULL) + 1 + (ms_timeout / 1000);
1095 
1096  do {
1097  rc = qb_ipcc_sendv(client->ipc, iov, 2);
1098  } while (rc == -EAGAIN && time(NULL) < timeout && crm_ipc_connected(client));
1099 
1100  return rc;
1101 }
1102 
1103 static int
1104 internal_ipc_get_reply(crm_ipc_t * client, int request_id, int ms_timeout)
1105 {
1106  time_t timeout = time(NULL) + 1 + (ms_timeout / 1000);
1107  int rc = 0;
1108 
1109  crm_ipc_init();
1110 
1111  /* get the reply */
1112  crm_trace("client %s waiting on reply to msg id %d", client->name, request_id);
1113  do {
1114 
1115  rc = qb_ipcc_recv(client->ipc, client->buffer, client->buf_size, 1000);
1116  if (rc > 0) {
1117  struct crm_ipc_response_header *hdr = NULL;
1118 
1119  int rc = crm_ipc_decompress(client);
1120 
1121  if (rc != pcmk_ok) {
1122  return rc;
1123  }
1124 
1125  hdr = (struct crm_ipc_response_header *)(void*)client->buffer;
1126  if (hdr->qb.id == request_id) {
1127  /* Got it */
1128  break;
1129  } else if (hdr->qb.id < request_id) {
1130  xmlNode *bad = string2xml(crm_ipc_buffer(client));
1131 
1132  crm_err("Discarding old reply %d (need %d)", hdr->qb.id, request_id);
1133  crm_log_xml_notice(bad, "OldIpcReply");
1134 
1135  } else {
1136  xmlNode *bad = string2xml(crm_ipc_buffer(client));
1137 
1138  crm_err("Discarding newer reply %d (need %d)", hdr->qb.id, request_id);
1139  crm_log_xml_notice(bad, "ImpossibleReply");
1140  CRM_ASSERT(hdr->qb.id <= request_id);
1141  }
1142  } else if (crm_ipc_connected(client) == FALSE) {
1143  crm_err("Server disconnected client %s while waiting for msg id %d", client->name,
1144  request_id);
1145  break;
1146  }
1147 
1148  } while (time(NULL) < timeout);
1149 
1150  return rc;
1151 }
1152 
1153 int
1154 crm_ipc_send(crm_ipc_t * client, xmlNode * message, enum crm_ipc_flags flags, int32_t ms_timeout,
1155  xmlNode ** reply)
1156 {
1157  long rc = 0;
1158  struct iovec *iov;
1159  static uint32_t id = 0;
1160  static int factor = 8;
1161  struct crm_ipc_response_header *header;
1162 
1163  crm_ipc_init();
1164 
1165  if (client == NULL) {
1166  crm_notice("Invalid connection");
1167  return -ENOTCONN;
1168 
1169  } else if (crm_ipc_connected(client) == FALSE) {
1170  /* Don't even bother */
1171  crm_notice("Connection to %s closed", client->name);
1172  return -ENOTCONN;
1173  }
1174 
1175  if (ms_timeout == 0) {
1176  ms_timeout = 5000;
1177  }
1178 
1179  if (client->need_reply) {
1180  crm_trace("Trying again to obtain pending reply from %s", client->name);
1181  rc = qb_ipcc_recv(client->ipc, client->buffer, client->buf_size, ms_timeout);
1182  if (rc < 0) {
1183  crm_warn("Sending to %s (%p) is disabled until pending reply is received", client->name,
1184  client->ipc);
1185  return -EALREADY;
1186 
1187  } else {
1188  crm_notice("Lost reply from %s (%p) finally arrived, sending re-enabled", client->name,
1189  client->ipc);
1190  client->need_reply = FALSE;
1191  }
1192  }
1193 
1194  id++;
1195  CRM_LOG_ASSERT(id != 0); /* Crude wrap-around detection */
1196  rc = crm_ipc_prepare(id, message, &iov, client->max_buf_size);
1197  if(rc < 0) {
1198  return rc;
1199  }
1200 
1201  header = iov[0].iov_base;
1202  header->flags |= flags;
1203 
1204  if(is_set(flags, crm_ipc_proxied)) {
1205  /* Don't look for a synchronous response */
1207  }
1208 
1209  if(header->size_compressed) {
1210  if(factor < 10 && (client->max_buf_size / 10) < (rc / factor)) {
1211  crm_notice("Compressed message exceeds %d0%% of the configured ipc limit (%u bytes), "
1212  "consider setting PCMK_ipc_buffer to %u or higher",
1213  factor, client->max_buf_size, 2 * client->max_buf_size);
1214  factor++;
1215  }
1216  }
1217 
1218  crm_trace("Sending from client: %s request id: %d bytes: %u timeout:%d msg...",
1219  client->name, header->qb.id, header->qb.size, ms_timeout);
1220 
1221  if (ms_timeout > 0 || is_not_set(flags, crm_ipc_client_response)) {
1222 
1223  rc = internal_ipc_send_request(client, iov, ms_timeout);
1224 
1225  if (rc <= 0) {
1226  crm_trace("Failed to send from client %s request %d with %u bytes...",
1227  client->name, header->qb.id, header->qb.size);
1228  goto send_cleanup;
1229 
1230  } else if (is_not_set(flags, crm_ipc_client_response)) {
1231  crm_trace("Message sent, not waiting for reply to %d from %s to %u bytes...",
1232  header->qb.id, client->name, header->qb.size);
1233 
1234  goto send_cleanup;
1235  }
1236 
1237  rc = internal_ipc_get_reply(client, header->qb.id, ms_timeout);
1238  if (rc < 0) {
1239  /* No reply, for now, disable sending
1240  *
1241  * The alternative is to close the connection since we don't know
1242  * how to detect and discard out-of-sequence replies
1243  *
1244  * TODO - implement the above
1245  */
1246  client->need_reply = TRUE;
1247  }
1248 
1249  } else {
1250  rc = internal_ipc_send_recv(client, iov);
1251  }
1252 
1253  if (rc > 0) {
1254  struct crm_ipc_response_header *hdr = (struct crm_ipc_response_header *)(void*)client->buffer;
1255 
1256  crm_trace("Received response %d, size=%u, rc=%ld, text: %.200s", hdr->qb.id, hdr->qb.size,
1257  rc, crm_ipc_buffer(client));
1258 
1259  if (reply) {
1260  *reply = string2xml(crm_ipc_buffer(client));
1261  }
1262 
1263  } else {
1264  crm_trace("Response not received: rc=%ld, errno=%d", rc, errno);
1265  }
1266 
1267  send_cleanup:
1268  if (crm_ipc_connected(client) == FALSE) {
1269  crm_notice("Connection to %s closed: %s (%ld)", client->name, pcmk_strerror(rc), rc);
1270 
1271  } else if (rc == -ETIMEDOUT) {
1272  crm_warn("Request %d to %s (%p) failed: %s (%ld) after %dms",
1273  header->qb.id, client->name, client->ipc, pcmk_strerror(rc), rc, ms_timeout);
1274  crm_write_blackbox(0, NULL);
1275 
1276  } else if (rc <= 0) {
1277  crm_warn("Request %d to %s (%p) failed: %s (%ld)",
1278  header->qb.id, client->name, client->ipc, pcmk_strerror(rc), rc);
1279  }
1280 
1281  free(header);
1282  free(iov[1].iov_base);
1283  free(iov);
1284  return rc;
1285 }
1286 
1287 int
1288 crm_ipc_is_authentic_process(int sock, uid_t refuid, gid_t refgid,
1289  pid_t *gotpid, uid_t *gotuid, gid_t *gotgid) {
1290  int ret = 0;
1291  pid_t found_pid = 0; uid_t found_uid = 0; gid_t found_gid = 0;
1292 #if defined(US_AUTH_PEERCRED_UCRED)
1293  struct ucred ucred;
1294  socklen_t ucred_len = sizeof(ucred);
1295 
1296  if (!getsockopt(sock, SOL_SOCKET, SO_PEERCRED,
1297  &ucred, &ucred_len)
1298  && ucred_len == sizeof(ucred)) {
1299  found_pid = ucred.pid; found_uid = ucred.uid; found_gid = ucred.gid;
1300 
1301 #elif defined(US_AUTH_PEERCRED_SOCKPEERCRED)
1302  struct sockpeercred sockpeercred;
1303  socklen_t sockpeercred_len = sizeof(sockpeercred);
1304 
1305  if (!getsockopt(sock, SOL_SOCKET, SO_PEERCRED,
1306  &sockpeercred, &sockpeercred_len)
1307  && sockpeercred_len == sizeof(sockpeercred_len)) {
1308  found_pid = sockpeercred.pid;
1309  found_uid = sockpeercred.uid; found_gid = sockpeercred.gid;
1310 
1311 #elif defined(US_AUTH_GETPEEREID)
1312  if (!getpeereid(sock, &found_uid, &found_gid)) {
1313  found_pid = PCMK__SPECIAL_PID; /* cannot obtain PID (FreeBSD) */
1314 
1315 #elif defined(US_AUTH_GETPEERUCRED)
1316  ucred_t *ucred;
1317  if (!getpeerucred(sock, &ucred)) {
1318  errno = 0;
1319  found_pid = ucred_getpid(ucred);
1320  found_uid = ucred_geteuid(ucred); found_gid = ucred_getegid(ucred);
1321  ret = -errno;
1322  ucred_free(ucred);
1323  if (ret) {
1324  return (ret < 0) ? ret : -pcmk_err_generic;
1325  }
1326 
1327 #else
1328 # error "No way to authenticate a Unix socket peer"
1329  errno = 0;
1330  if (0) {
1331 #endif
1332  if (gotpid != NULL) {
1333  *gotpid = found_pid;
1334  }
1335  if (gotuid != NULL) {
1336  *gotuid = found_uid;
1337  }
1338  if (gotgid != NULL) {
1339  *gotgid = found_gid;
1340  }
1341  ret = (found_uid == 0 || found_uid == refuid || found_gid == refgid);
1342  } else {
1343  ret = (errno > 0) ? -errno : -pcmk_err_generic;
1344  }
1345 
1346  return ret;
1347 }
1348 
1349 int
1350 pcmk__ipc_is_authentic_process_active(const char *name, uid_t refuid,
1351  gid_t refgid, pid_t *gotpid) {
1352  static char last_asked_name[PATH_MAX / 2] = ""; /* log spam prevention */
1353  int fd, ret = 0;
1354  pid_t found_pid = 0; uid_t found_uid = 0; gid_t found_gid = 0;
1355  qb_ipcc_connection_t *c;
1356 
1357  if ((c = qb_ipcc_connect(name, 0)) == NULL) {
1358  crm_info("Could not connect to %s IPC: %s", name, strerror(errno));
1359 
1360  } else if ((ret = qb_ipcc_fd_get(c, &fd))) {
1361  crm_err("Could not get fd from %s IPC: %s (%d)", name,
1362  strerror(-ret), -ret);
1363  ret = -1;
1364 
1365  } else if ((ret = crm_ipc_is_authentic_process(fd, refuid, refgid,
1366  &found_pid, &found_uid,
1367  &found_gid)) < 0) {
1368  if (ret == -pcmk_err_generic) {
1369  crm_err("Could not get peer credentials from %s IPC", name);
1370  } else {
1371  crm_err("Could not get peer credentials from %s IPC: %s (%d)",
1372  name, strerror(-ret), -ret);
1373  }
1374  ret = -1;
1375 
1376  } else {
1377  if (gotpid != NULL) {
1378  *gotpid = found_pid;
1379  }
1380 
1381  if (!ret) {
1382  crm_err("Daemon (IPC %s) effectively blocked with unauthorized"
1383  " process %lld (uid: %lld, gid: %lld)",
1384  name, (long long) PCMK__SPECIAL_PID_AS_0(found_pid),
1385  (long long) found_uid, (long long) found_gid);
1386  ret = -2;
1387  } else if ((found_uid != refuid || found_gid != refgid)
1388  && strncmp(last_asked_name, name, sizeof(last_asked_name))) {
1389  if (!found_uid && refuid) {
1390  crm_warn("Daemon (IPC %s) runs as root, whereas the expected"
1391  " credentials are %lld:%lld, hazard of violating"
1392  " the least privilege principle",
1393  name, (long long) refuid, (long long) refgid);
1394  } else {
1395  crm_notice("Daemon (IPC %s) runs as %lld:%lld, whereas the"
1396  " expected credentials are %lld:%lld, which may"
1397  " mean a different set of privileges than expected",
1398  name, (long long) found_uid, (long long) found_gid,
1399  (long long) refuid, (long long) refgid);
1400  }
1401  memccpy(last_asked_name, name, '\0', sizeof(last_asked_name));
1402  }
1403  }
1404 
1405  if (ret) { /* here, !ret only when we could not initially connect */
1406  qb_ipcc_disconnect(c);
1407  }
1408 
1409  return ret;
1410 }
1411 
1412 
1413 /* Utils */
1414 
1415 xmlNode *
1416 create_hello_message(const char *uuid,
1417  const char *client_name, const char *major_version, const char *minor_version)
1418 {
1419  xmlNode *hello_node = NULL;
1420  xmlNode *hello = NULL;
1421 
1422  if (uuid == NULL || strlen(uuid) == 0
1423  || client_name == NULL || strlen(client_name) == 0
1424  || major_version == NULL || strlen(major_version) == 0
1425  || minor_version == NULL || strlen(minor_version) == 0) {
1426  crm_err("Missing fields, Hello message will not be valid.");
1427  return NULL;
1428  }
1429 
1430  hello_node = create_xml_node(NULL, XML_TAG_OPTIONS);
1431  crm_xml_add(hello_node, "major_version", major_version);
1432  crm_xml_add(hello_node, "minor_version", minor_version);
1433  crm_xml_add(hello_node, "client_name", client_name);
1434  crm_xml_add(hello_node, "client_uuid", uuid);
1435 
1436  crm_trace("creating hello message");
1437  hello = create_request(CRM_OP_HELLO, hello_node, NULL, NULL, client_name, uuid);
1438  free_xml(hello_node);
1439 
1440  return hello;
1441 }
#define F_CRM_TASK
Definition: msg_xml.h:56
const char * crm_ipc_buffer(crm_ipc_t *client)
Definition: ipc.c:1051
#define F_CRM_REFERENCE
Definition: msg_xml.h:62
void crm_write_blackbox(int nsig, struct qb_log_callsite *callsite)
Definition: logging.c:407
A dumping ground.
#define F_TYPE
Definition: msg_xml.h:34
void crm_ipc_close(crm_ipc_t *client)
Definition: ipc.c:869
#define crm_notice(fmt, args...)
Definition: logging.h:250
char * crm_generate_uuid(void)
Definition: utils.c:2327
uint32_t crm_ipc_buffer_flags(crm_ipc_t *client)
Definition: ipc.c:1058
int crm_ipc_send(crm_ipc_t *client, xmlNode *message, enum crm_ipc_flags flags, int32_t ms_timeout, xmlNode **reply)
Definition: ipc.c:1154
#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:1113
crm_client_t * crm_client_get(qb_ipcs_connection_t *c)
Definition: ipc.c:208
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:38
#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:219
xmlNode * create_reply_adv(xmlNode *original_request, xmlNode *xml_response_data, const char *origin)
Definition: ipc.c:151
char * buffer
Definition: ipcs.h:43
#define PCMK__SPECIAL_PID_AS_0(p)
Definition: ipc_internal.h:34
bool crm_ipc_connect(crm_ipc_t *client)
Establish an IPC connection to a Pacemaker component.
Definition: ipc.c:801
int crm_parse_int(const char *text, const char *default_text)
Definition: utils.c:634
#define PCMK_IPC_VERSION
Definition: ipc.c:42
#define PCMK__SPECIAL_PID
Definition: ipc_internal.h:25
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:446
#define CRM_LOG_ASSERT(expr)
Definition: logging.h:150
void crm_client_destroy(crm_client_t *c)
Definition: ipc.c:347
int crm_ipc_get_fd(crm_ipc_t *client)
Definition: ipc.c:907
void crm_client_init(void)
Definition: ipc.c:253
int crm_ipc_is_authentic_process(int sock, uid_t refuid, gid_t refgid, pid_t *gotpid, uid_t *gotuid, gid_t *gotgid)
Check the authenticity of the IPC socket peer process.
Definition: ipc.c:1288
#define clear_bit(word, bit)
Definition: crm_internal.h:220
void crm_client_disconnect_all(qb_ipcs_service_t *service)
Definition: ipc.c:275
char * strerror(int errnum)
ssize_t crm_ipc_prepare(uint32_t request, xmlNode *message, struct iovec **result, uint32_t max_send_size)
Definition: ipc.c:536
char * user
Definition: ipcs.h:74
ssize_t crm_ipcs_flush_events(crm_client_t *c)
Definition: ipc.c:471
xmlNode * string2xml(const char *input)
Definition: xml.c:2957
char version[256]
Definition: plugin.c:84
#define MAX_MSG_SIZE
Definition: ipc.c:730
#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:615
#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:298
uint64_t flags
Definition: remote.c:121
#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:1072
GList * event_queue
Definition: ipcs.h:83
GHashTable * client_connections
Definition: ipc.c:205
unsigned int crm_ipc_default_buffer_size(void)
Definition: ipc.c:68
#define crm_trace(fmt, args...)
Definition: logging.h:254
void crm_ipc_destroy(crm_ipc_t *client)
Definition: ipc.c:884
xmlNode * create_xml_node(xmlNode *parent, const char *name)
Definition: xml.c:2793
const char * crm_element_value(xmlNode *data, const char *name)
Definition: xml.c:5839
#define pcmk_err_generic
Definition: error.h:45
#define CRM_DAEMON_USER
Definition: config.h:47
gboolean add_message_xml(xmlNode *msg, const char *field, xmlNode *xml)
Definition: xml.c:3332
void free_xml(xmlNode *child)
Definition: xml.c:2848
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:712
xmlNode * crm_ipcs_recv(crm_client_t *c, void *data, size_t size, uint32_t *id, uint32_t *flags)
Definition: ipc.c:404
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:2695
const char * crm_xml_add_int(xmlNode *node, const char *name, int value)
Definition: xml.c:2783
ssize_t crm_ipcs_send(crm_client_t *c, uint32_t request, xmlNode *message, enum crm_ipc_flags flags)
Definition: ipc.c:687
int pcmk__ipc_is_authentic_process_active(const char *name, uid_t refuid, gid_t refgid, pid_t *gotpid)
Definition: ipc.c:1350
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
bool crm_compress_string(const char *data, int length, int max, char **result, unsigned int *result_len)
Definition: utils.c:2371
xmlNode * create_hello_message(const char *uuid, const char *client_name, const char *major_version, const char *minor_version)
Definition: ipc.c:1416
#define CRM_OP_HELLO
Definition: crm.h:106
#define crm_err(fmt, args...)
Definition: logging.h:248
const char * bz2_strerror(int rc)
Definition: logging.c:1176
#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:3987
int crm_ipc_ready(crm_ipc_t *client)
Definition: ipc.c:946
#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:1005
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:412
#define F_CRM_ORIGIN
Definition: msg_xml.h:64
int crm_ipcs_client_pid(qb_ipcs_connection_t *c)
Definition: ipc.c:394
#define crm_log_xml_trace(xml, text)
Definition: logging.h:262
void crm_client_cleanup(void)
Definition: ipc.c:262
enum client_type kind
Definition: ipcs.h:88
const char * crm_client_name(crm_client_t *c)
Definition: ipc.c:239
bool crm_ipc_connected(crm_ipc_t *client)
Definition: ipc.c:921
crm_ipc_t * crm_ipc_new(const char *name, size_t max_size)
Definition: ipc.c:771
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:106
#define create_request(task, xml_data, host_to, sys_to, sys_from, uuid_from)
Definition: ipc.h:34
#define crm_info(fmt, args...)
Definition: logging.h:251
char * uid2username(uid_t uid)
#define F_CRM_VERSION
Definition: msg_xml.h:63
enum crm_ais_msg_types type
Definition: internal.h:51
#define int32_t
Definition: stdint.in.h:157