21 #include <sys/param.h>
24 #include <sys/types.h>
38 #define PCMK_IPC_VERSION 1
40 struct crm_ipc_response_header {
41 struct qb_ipc_response_header qb;
48 static int hdr_offset = 0;
49 static unsigned int ipc_buffer_max = 0;
50 static unsigned int pick_ipc_buffer(
unsigned int max);
55 if (hdr_offset == 0) {
56 hdr_offset =
sizeof(
struct crm_ipc_response_header);
58 if (ipc_buffer_max == 0) {
59 ipc_buffer_max = pick_ipc_buffer(0);
66 return pick_ipc_buffer(0);
70 generateReference(
const char *custom1,
const char *custom2)
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;
81 if (local_cust1 == NULL) {
82 local_cust1 =
"_empty_";
84 reference_len += strlen(local_cust1);
86 if (local_cust2 == NULL) {
87 local_cust2 =
"_empty_";
89 reference_len += strlen(local_cust2);
91 since_epoch = calloc(1, reference_len);
93 if (since_epoch != NULL) {
94 sprintf(since_epoch,
"%s-%s-%lu-%u",
95 local_cust1, local_cust2, (
unsigned long)time(NULL), ref_counter++);
103 const char *host_to,
const char *sys_to,
104 const char *sys_from,
const char *uuid_from,
const char *origin)
106 char *true_from = NULL;
107 xmlNode *request = NULL;
108 char *reference = generateReference(task, sys_from);
110 if (uuid_from != NULL) {
112 }
else if (sys_from != NULL) {
113 true_from = strdup(sys_from);
115 crm_err(
"No sys from specified");
130 if (host_to != NULL && strlen(host_to) > 0) {
134 if (msg_data != NULL) {
147 create_reply_adv(xmlNode * original_request, xmlNode * xml_response_data,
const char *origin)
149 xmlNode *reply = NULL;
159 crm_err(
"Cannot create new_message, no message type in original message");
164 crm_err(
"Cannot create new_message, original message was not a request");
170 crm_err(
"Cannot create new_message, malloc failed");
186 if (host_from != NULL && strlen(host_from) > 0) {
190 if (xml_response_data != NULL) {
206 if (client_connections) {
207 return g_hash_table_lookup(client_connections, c);
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) {
230 crm_trace(
"No client found with id=%s",
id);
239 }
else if (c->
name == NULL && c->
id == NULL) {
241 }
else if (c->
name == NULL) {
251 if (client_connections == NULL) {
253 client_connections = g_hash_table_new(g_direct_hash, g_direct_equal);
260 if (client_connections != NULL) {
261 int active = g_hash_table_size(client_connections);
264 crm_err(
"Exiting with %d active connections", active);
266 g_hash_table_destroy(client_connections); client_connections = NULL;
273 qb_ipcs_connection_t *c = NULL;
275 if (service == NULL) {
279 c = qb_ipcs_connection_first_get(service);
282 qb_ipcs_connection_t *last = c;
284 c = qb_ipcs_connection_next_get(service, last);
288 qb_ipcs_disconnect(last);
289 qb_ipcs_connection_unref(last);
296 static gid_t gid_cluster = 0;
305 if (gid_cluster == 0) {
307 static bool have_error = FALSE;
308 if(have_error == FALSE) {
315 if (uid_client != 0) {
316 crm_trace(
"Giving access to group %u", gid_cluster);
318 qb_ipcs_connection_auth_set(c, -1, gid_cluster, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
332 crm_debug(
"Connecting %p for uid=%d gid=%d pid=%u id=%s", c, uid_client, gid_client, client->
pid, client->
id);
338 g_hash_table_insert(client_connections, c, client);
349 if (client_connections) {
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);
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);
371 free(event[0].iov_base);
372 free(event[1].iov_base);
392 struct qb_ipcs_connection_stats stats;
394 stats.client_pid = 0;
395 qb_ipcs_connection_stats_get(c, &stats, 0);
396 return stats.client_pid;
403 char *uncompressed = NULL;
404 char *text = ((
char *)data) +
sizeof(
struct crm_ipc_response_header);
405 struct crm_ipc_response_header *header =
data;
408 *
id = ((
struct qb_ipc_response_header *)data)->id;
411 *flags = header->flags;
422 crm_err(
"Filtering incompatible v%d IPC message, we only support versions <= %d",
427 if (header->size_compressed) {
429 unsigned int size_u = 1 + header->size_uncompressed;
430 uncompressed = calloc(1, size_u);
432 crm_trace(
"Decompressing message data %u bytes into %u bytes",
433 header->size_compressed, size_u);
435 rc = BZ2_bzBuffToBuffDecompress(uncompressed, &size_u, text, header->size_compressed, 1, 0);
445 CRM_ASSERT(text[header->size_uncompressed - 1] == 0);
457 crm_ipcs_flush_events_cb(gpointer
data)
484 struct crm_ipc_response_header *header = NULL;
487 rc = qb_ipcs_event_sendv(c->
ipcs, event, 2);
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);
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));
504 free(event[0].iov_base);
505 free(event[1].iov_base);
511 crm_trace(
"Sent %d events (%d remaining) for %p[%d]: %s (%lld)",
512 sent, queue_len, c->
ipcs, c->
pid,
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);
520 }
else if (queue_len > 500) {
521 crm_err(
"Evicting slow client %p[%d]: event queue reached %d entries",
523 qb_ipcs_disconnect(c->
ipcs);
527 c->
event_timer = g_timeout_add(1000 + 100 * queue_len, crm_ipcs_flush_events_cb, c);
536 static unsigned int biggest = 0;
538 unsigned int total = 0;
539 char *compressed = NULL;
541 struct crm_ipc_response_header *header = calloc(1,
sizeof(
struct crm_ipc_response_header));
547 if (max_send_size == 0) {
548 max_send_size = ipc_buffer_max;
554 iov = calloc(2,
sizeof(
struct iovec));
557 iov[0].iov_len = hdr_offset;
558 iov[0].iov_base = header;
561 header->size_uncompressed = 1 + strlen(buffer);
562 total = iov[0].iov_len + header->size_uncompressed;
564 if (total < max_send_size) {
565 iov[1].iov_base = buffer;
566 iov[1].iov_len = header->size_uncompressed;
569 unsigned int new_size = 0;
572 (buffer, header->size_uncompressed, max_send_size, &compressed, &new_size)) {
575 header->size_compressed = new_size;
577 iov[1].iov_len = header->size_compressed;
578 iov[1].iov_base = compressed;
582 biggest = QB_MAX(header->size_compressed, biggest);
585 ssize_t rc = -EMSGSIZE;
588 biggest = QB_MAX(header->size_uncompressed, biggest);
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);
604 header->qb.size = iov[0].iov_len + iov[1].iov_len;
605 header->qb.id = (
int32_t)request;
609 return header->qb.size;
617 struct crm_ipc_response_header *header = iov[0].iov_base;
629 header->flags |=
flags;
631 header->qb.id =
id++;
638 struct iovec *iov_copy = calloc(2,
sizeof(
struct iovec));
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);
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);
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)",
661 crm_trace(
"Response %d sent, %lld bytes to %p[%d]",
662 header->qb.id, (
long long) rc, c->
ipcs, c->
pid);
666 free(iov[0].iov_base);
667 free(iov[1].iov_base);
672 if (flags & crm_ipc_server_event) {
678 if (rc == -EPIPE || rc == -ENOTCONN) {
689 struct iovec *iov = NULL;
693 return -EDESTADDRREQ;
703 crm_notice(
"Message to %p[%d] failed: %s (%d)",
728 #define MIN_MSG_SIZE 12336
729 #define MAX_MSG_SIZE 128*1024
735 unsigned int max_buf_size;
737 unsigned int buf_size;
744 qb_ipcc_connection_t *ipc;
749 pick_ipc_buffer(
unsigned int max)
751 static unsigned int global_max = 0;
753 if (global_max == 0) {
754 const char *env = getenv(
"PCMK_ipc_buffer");
766 return QB_MAX(max, global_max);
776 client->name = strdup(name);
777 client->buf_size = pick_ipc_buffer(max_size);
778 client->buffer = malloc(client->buf_size);
781 client->max_buf_size = client->buf_size;
784 client->pfd.events = POLLIN;
785 client->pfd.revents = 0;
800 client->need_reply = FALSE;
801 client->ipc = qb_ipcc_connect(client->name, client->buf_size);
803 if (client->ipc == NULL) {
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);
814 qb_ipcc_context_set(client->ipc, client);
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;
832 crm_trace(
"Disconnecting %s IPC connection %p (%p)", client->name, client, client->ipc);
835 qb_ipcc_connection_t *ipc = client->ipc;
838 qb_ipcc_disconnect(ipc);
847 if (client->ipc && qb_ipcc_is_connected(client->ipc)) {
848 crm_notice(
"Destroying an active IPC connection to %s", client->name);
859 crm_trace(
"Destroying IPC connection to %s: %p", client->name, client);
860 free(client->buffer);
871 if (client && client->ipc && (qb_ipcc_fd_get(client->ipc, &fd) == 0)) {
875 crm_perror(LOG_ERR,
"Could not obtain file IPC descriptor for %s",
876 (client? client->name :
"unspecified client"));
885 if (client == NULL) {
889 }
else if (client->ipc == NULL) {
893 }
else if (client->pfd.fd < 0) {
898 rc = qb_ipcc_is_connected(client->ipc);
900 client->pfd.fd = -EINVAL;
923 client->pfd.revents = 0;
924 rc = poll(&(client->pfd), 1, 0);
925 return (rc < 0)? -errno : rc;
931 struct crm_ipc_response_header *header = (
struct crm_ipc_response_header *)(
void*)client->buffer;
933 if (header->size_compressed) {
935 unsigned int size_u = 1 + header->size_uncompressed;
937 unsigned int new_buf_size = QB_MAX((hdr_offset + size_u), client->max_buf_size);
938 char *uncompressed = calloc(1, new_buf_size);
940 crm_trace(
"Decompressing message data %u bytes into %u bytes",
941 header->size_compressed, size_u);
943 rc = BZ2_bzBuffToBuffDecompress(uncompressed + hdr_offset, &size_u,
944 client->buffer + hdr_offset, header->size_compressed, 1, 0);
960 CRM_ASSERT(size_u == header->size_uncompressed);
962 memcpy(uncompressed, client->buffer, hdr_offset);
963 header = (
struct crm_ipc_response_header *)(
void*)uncompressed;
965 free(client->buffer);
966 client->buf_size = new_buf_size;
967 client->buffer = uncompressed;
970 CRM_ASSERT(client->buffer[hdr_offset + header->size_uncompressed - 1] == 0);
977 struct crm_ipc_response_header *header = NULL;
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);
994 header = (
struct crm_ipc_response_header *)(
void*)client->buffer;
996 crm_err(
"Filtering incompatible v%d IPC message, we only support versions <= %d",
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);
1010 crm_err(
"Connection to %s failed", client->name);
1015 return header->size_uncompressed;
1024 return client->buffer +
sizeof(
struct crm_ipc_response_header);
1030 struct crm_ipc_response_header *header = NULL;
1033 if (client->buffer == NULL) {
1037 header = (
struct crm_ipc_response_header *)(
void*)client->buffer;
1038 return header->flags;
1045 return client->name;
1049 internal_ipc_send_recv(
crm_ipc_t * client,
const void *iov)
1054 rc = qb_ipcc_sendv_recv(client->ipc, iov, 2, client->buffer, client->buf_size, -1);
1061 internal_ipc_send_request(
crm_ipc_t * client,
const void *iov,
int ms_timeout)
1064 time_t timeout = time(NULL) + 1 + (ms_timeout / 1000);
1067 rc = qb_ipcc_sendv(client->ipc, iov, 2);
1074 internal_ipc_get_reply(
crm_ipc_t * client,
int request_id,
int ms_timeout)
1076 time_t timeout = time(NULL) + 1 + (ms_timeout / 1000);
1082 crm_trace(
"client %s waiting on reply to msg id %d", client->name, request_id);
1085 rc = qb_ipcc_recv(client->ipc, client->buffer, client->buf_size, 1000);
1087 struct crm_ipc_response_header *hdr = NULL;
1089 int rc = crm_ipc_decompress(client);
1095 hdr = (
struct crm_ipc_response_header *)(
void*)client->buffer;
1096 if (hdr->qb.id == request_id) {
1099 }
else if (hdr->qb.id < request_id) {
1102 crm_err(
"Discarding old reply %d (need %d)", hdr->qb.id, request_id);
1108 crm_err(
"Discarding newer reply %d (need %d)", hdr->qb.id, request_id);
1113 crm_err(
"Server disconnected client %s while waiting for msg id %d", client->name,
1118 }
while (time(NULL) < timeout);
1130 static int factor = 8;
1131 struct crm_ipc_response_header *header;
1135 if (client == NULL) {
1141 crm_notice(
"Connection to %s closed", client->name);
1145 if (ms_timeout == 0) {
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);
1153 crm_warn(
"Sending to %s (%p) is disabled until pending reply is received", client->name,
1158 crm_notice(
"Lost reply from %s (%p) finally arrived, sending re-enabled", client->name,
1160 client->need_reply = FALSE;
1171 header = iov[0].iov_base;
1172 header->flags |=
flags;
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);
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);
1193 rc = internal_ipc_send_request(client, iov, ms_timeout);
1196 crm_trace(
"Failed to send from client %s request %d with %u bytes...",
1197 client->name, header->qb.id, header->qb.size);
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);
1207 rc = internal_ipc_get_reply(client, header->qb.id, ms_timeout);
1216 client->need_reply = TRUE;
1220 rc = internal_ipc_send_recv(client, iov);
1224 struct crm_ipc_response_header *hdr = (
struct crm_ipc_response_header *)(
void*)client->buffer;
1226 crm_trace(
"Received response %d, size=%u, rc=%ld, text: %.200s", hdr->qb.id, hdr->qb.size,
1234 crm_trace(
"Response not received: rc=%ld, errno=%d", rc, errno);
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);
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);
1252 free(iov[1].iov_base);
1261 const char *client_name,
const char *major_version,
const char *minor_version)
1263 xmlNode *hello_node = NULL;
1264 xmlNode *hello = NULL;
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.");
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);
const char * crm_ipc_buffer(crm_ipc_t *client)
void crm_write_blackbox(int nsig, struct qb_log_callsite *callsite)
void crm_ipc_close(crm_ipc_t *client)
#define crm_notice(fmt, args...)
char * crm_generate_uuid(void)
uint32_t crm_ipc_buffer_flags(crm_ipc_t *client)
int crm_ipc_send(crm_ipc_t *client, xmlNode *message, enum crm_ipc_flags flags, int32_t ms_timeout, xmlNode **reply)
const char * pcmk_strerror(int rc)
crm_client_t * crm_client_get(qb_ipcs_connection_t *c)
qb_ipcs_connection_t * ipcs
crm_client_t * crm_client_get_by_id(const char *id)
xmlNode * create_reply_adv(xmlNode *original_request, xmlNode *xml_response_data, const char *origin)
bool crm_ipc_connect(crm_ipc_t *client)
Establish an IPC connection to a Pacemaker component.
int crm_parse_int(const char *text, const char *default_text)
struct crm_remote_s * remote
int crm_user_lookup(const char *name, uid_t *uid, gid_t *gid)
#define CRM_LOG_ASSERT(expr)
void crm_client_destroy(crm_client_t *c)
int crm_ipc_get_fd(crm_ipc_t *client)
void crm_client_init(void)
#define clear_bit(word, bit)
void crm_client_disconnect_all(qb_ipcs_service_t *service)
ssize_t crm_ipc_prepare(uint32_t request, xmlNode *message, struct iovec **result, uint32_t max_send_size)
ssize_t crm_ipcs_flush_events(crm_client_t *c)
xmlNode * string2xml(const char *input)
ssize_t crm_ipcs_sendv(crm_client_t *c, struct iovec *iov, enum crm_ipc_flags flags)
#define crm_warn(fmt, args...)
crm_client_t * crm_client_new(qb_ipcs_connection_t *c, uid_t uid_client, gid_t gid_client)
#define crm_debug(fmt, args...)
struct crm_ipc_s crm_ipc_t
const char * crm_ipc_name(crm_ipc_t *client)
GHashTable * client_connections
unsigned int crm_ipc_default_buffer_size(void)
#define crm_trace(fmt, args...)
void crm_ipc_destroy(crm_ipc_t *client)
xmlNode * create_xml_node(xmlNode *parent, const char *name)
const char * crm_element_value(xmlNode *data, const char *name)
gboolean add_message_xml(xmlNode *msg, const char *field, xmlNode *xml)
void free_xml(xmlNode *child)
void crm_ipcs_send_ack(crm_client_t *c, uint32_t request, uint32_t flags, const char *tag, const char *function, int line)
xmlNode * crm_ipcs_recv(crm_client_t *c, void *data, size_t size, uint32_t *id, uint32_t *flags)
const char * crm_xml_add(xmlNode *node, const char *name, const char *value)
const char * crm_xml_add_int(xmlNode *node, const char *name, int value)
bool crm_compress_string(const char *data, int length, int max, char **result, unsigned int *result_len)
ssize_t crm_ipcs_send(crm_client_t *c, uint32_t request, xmlNode *message, enum crm_ipc_flags flags)
#define crm_perror(level, fmt, args...)
Log a system error message.
xmlNode * create_hello_message(const char *uuid, const char *client_name, const char *major_version, const char *minor_version)
#define crm_err(fmt, args...)
const char * bz2_strerror(int rc)
#define crm_log_xml_notice(xml, text)
char * dump_xml_unformatted(xmlNode *msg)
int crm_ipc_ready(crm_ipc_t *client)
Check whether an IPC connection is ready to be read.
#define XML_ATTR_RESPONSE
long crm_ipc_read(crm_ipc_t *client)
Wrappers for and extensions to libqb IPC.
char * generate_hash_key(const char *crm_msg_reference, const char *sys)
int crm_ipcs_client_pid(qb_ipcs_connection_t *c)
#define crm_log_xml_trace(xml, text)
void crm_client_cleanup(void)
const char * crm_client_name(crm_client_t *c)
bool crm_ipc_connected(crm_ipc_t *client)
crm_ipc_t * crm_ipc_new(const char *name, size_t max_size)
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)
#define create_request(task, xml_data, host_to, sys_to, sys_from, uuid_from)
char * uid2username(uid_t uid)
enum crm_ais_msg_types type