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) {
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) {
264 crm_err(
"Exiting with %d active connections", active);
273 qb_ipcs_connection_t *c = qb_ipcs_connection_first_get(service);
276 qb_ipcs_connection_t *last = c;
278 c = qb_ipcs_connection_next_get(service, last);
282 qb_ipcs_disconnect(last);
283 qb_ipcs_connection_unref(last);
290 static gid_t gid_cluster = 0;
299 if (gid_cluster == 0) {
301 static bool have_error = FALSE;
302 if(have_error == FALSE) {
309 if (uid_client != 0) {
310 crm_trace(
"Giving access to group %u", gid_cluster);
312 qb_ipcs_connection_auth_set(c, -1, gid_cluster, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
326 crm_debug(
"Connecting %p for uid=%d gid=%d pid=%u id=%s", c, uid_client, gid_client, client->
pid, client->
id);
345 crm_trace(
"Destroying %p/%p (%d remaining)",
350 crm_trace(
"Destroying remote connection %p (%d remaining)",
365 free(event[0].iov_base);
366 free(event[1].iov_base);
386 struct qb_ipcs_connection_stats stats;
388 stats.client_pid = 0;
389 qb_ipcs_connection_stats_get(c, &stats, 0);
390 return stats.client_pid;
397 char *uncompressed = NULL;
398 char *text = ((
char *)data) +
sizeof(
struct crm_ipc_response_header);
399 struct crm_ipc_response_header *header =
data;
402 *
id = ((
struct qb_ipc_response_header *)data)->id;
405 *flags = header->flags;
416 crm_err(
"Filtering incompatible v%d IPC message, we only support versions <= %d",
421 if (header->size_compressed) {
423 unsigned int size_u = 1 + header->size_uncompressed;
424 uncompressed = calloc(1, size_u);
426 crm_trace(
"Decompressing message data %u bytes into %u bytes",
427 header->size_compressed, size_u);
429 rc = BZ2_bzBuffToBuffDecompress(uncompressed, &size_u, text, header->size_compressed, 1, 0);
439 CRM_ASSERT(text[header->size_uncompressed - 1] == 0);
451 crm_ipcs_flush_events_cb(gpointer
data)
478 struct crm_ipc_response_header *header = NULL;
481 rc = qb_ipcs_event_sendv(c->
ipcs, event, 2);
487 header =
event[0].iov_base;
488 if (header->size_compressed) {
489 crm_trace(
"Event %d to %p[%d] (%d compressed bytes) sent",
490 header->qb.id, c->
ipcs, c->
pid, rc);
492 crm_trace(
"Event %d to %p[%d] (%d bytes) sent: %.120s",
493 header->qb.id, c->
ipcs, c->
pid, rc, event[1].iov_base);
497 free(event[0].iov_base);
498 free(event[1].iov_base);
504 crm_trace(
"Sent %d events (%d remaining) for %p[%d]: %s (%d)",
509 if (queue_len % 100 == 0 && queue_len > 99) {
510 crm_warn(
"Event queue for %p[%d] has grown to %d", c->
ipcs, c->
pid, queue_len);
512 }
else if (queue_len > 500) {
513 crm_err(
"Evicting slow client %p[%d]: event queue reached %d entries",
515 qb_ipcs_disconnect(c->
ipcs);
519 c->
event_timer = g_timeout_add(1000 + 100 * queue_len, crm_ipcs_flush_events_cb, c);
528 static unsigned int biggest = 0;
530 unsigned int total = 0;
531 char *compressed = NULL;
533 struct crm_ipc_response_header *header = calloc(1,
sizeof(
struct crm_ipc_response_header));
539 if (max_send_size == 0) {
540 max_send_size = ipc_buffer_max;
546 iov = calloc(2,
sizeof(
struct iovec));
549 iov[0].iov_len = hdr_offset;
550 iov[0].iov_base = header;
553 header->size_uncompressed = 1 + strlen(buffer);
554 total = iov[0].iov_len + header->size_uncompressed;
556 if (total < max_send_size) {
557 iov[1].iov_base = buffer;
558 iov[1].iov_len = header->size_uncompressed;
561 unsigned int new_size = 0;
564 (buffer, header->size_uncompressed, max_send_size, &compressed, &new_size)) {
567 header->size_compressed = new_size;
569 iov[1].iov_len = header->size_compressed;
570 iov[1].iov_base = compressed;
574 biggest = QB_MAX(header->size_compressed, biggest);
577 ssize_t rc = -EMSGSIZE;
580 biggest = QB_MAX(header->size_uncompressed, biggest);
583 (
"Could not compress the message (%u bytes) into less than the configured ipc limit (%u bytes). " 584 "Set PCMK_ipc_buffer to a higher value (%u bytes suggested)",
585 header->size_uncompressed, max_send_size, 4 * biggest);
596 header->qb.size = iov[0].iov_len + iov[1].iov_len;
597 header->qb.id = (
int32_t)request;
601 return header->qb.size;
609 struct crm_ipc_response_header *header = iov[0].iov_base;
621 header->flags |=
flags;
623 header->qb.id =
id++;
630 struct iovec *iov_copy = calloc(2,
sizeof(
struct iovec));
633 iov_copy[0].iov_len = iov[0].iov_len;
634 iov_copy[0].iov_base = malloc(iov[0].iov_len);
635 memcpy(iov_copy[0].iov_base, iov[0].iov_base, iov[0].iov_len);
637 iov_copy[1].iov_len = iov[1].iov_len;
638 iov_copy[1].iov_base = malloc(iov[1].iov_len);
639 memcpy(iov_copy[1].iov_base, iov[1].iov_base, iov[1].iov_len);
647 rc = qb_ipcs_response_sendv(c->
ipcs, iov, 2);
648 if (rc < header->qb.size) {
649 crm_notice(
"Response %d to %p[%d] (%u bytes) failed: %s (%d)",
653 crm_trace(
"Response %d sent, %d bytes to %p[%d]", header->qb.id, rc, c->
ipcs, c->
pid);
657 free(iov[0].iov_base);
658 free(iov[1].iov_base);
663 if (flags & crm_ipc_server_event) {
669 if (rc == -EPIPE || rc == -ENOTCONN) {
680 struct iovec *iov = NULL;
684 return -EDESTADDRREQ;
694 crm_notice(
"Message to %p[%d] failed: %s (%d)",
719 #define MIN_MSG_SIZE 12336 720 #define MAX_MSG_SIZE 128*1024 726 unsigned int max_buf_size;
728 unsigned int buf_size;
735 qb_ipcc_connection_t *ipc;
740 pick_ipc_buffer(
unsigned int max)
742 static unsigned int global_max = 0;
744 if(global_max == 0) {
745 const char *env = getenv(
"PCMK_ipc_buffer");
757 return QB_MAX(max, global_max);
767 client->name = strdup(name);
768 client->buf_size = pick_ipc_buffer(max_size);
769 client->buffer = malloc(client->buf_size);
772 client->max_buf_size = client->buf_size;
775 client->pfd.events = POLLIN;
776 client->pfd.revents = 0;
791 client->need_reply = FALSE;
792 client->ipc = qb_ipcc_connect(client->name, client->buf_size);
794 if (client->ipc == NULL) {
800 if (client->pfd.fd < 0) {
801 crm_debug(
"Could not obtain file descriptor for %s connection: %s (%d)", client->name,
pcmk_strerror(errno), errno);
805 qb_ipcc_context_set(client->ipc, client);
807 #ifdef HAVE_IPCS_GET_BUFFER_SIZE 808 client->max_buf_size = qb_ipcc_get_buffer_size(client->ipc);
809 if (client->max_buf_size > client->buf_size) {
810 free(client->buffer);
811 client->buffer = calloc(1, client->max_buf_size);
812 client->buf_size = client->max_buf_size;
823 crm_trace(
"Disconnecting %s IPC connection %p (%p.%p)", client->name, client, client->ipc);
826 qb_ipcc_connection_t *ipc = client->ipc;
829 qb_ipcc_disconnect(ipc);
838 if (client->ipc && qb_ipcc_is_connected(client->ipc)) {
839 crm_notice(
"Destroying an active IPC connection to %s", client->name);
850 crm_trace(
"Destroying IPC connection to %s: %p", client->name, client);
851 free(client->buffer);
862 if (client && client->ipc && (qb_ipcc_fd_get(client->ipc, &fd) == 0)) {
866 crm_perror(LOG_ERR,
"Could not obtain file IPC descriptor for %s",
867 (client? client->name :
"unspecified client"));
876 if (client == NULL) {
880 }
else if (client->ipc == NULL) {
884 }
else if (client->pfd.fd < 0) {
889 rc = qb_ipcc_is_connected(client->ipc);
891 client->pfd.fd = -EINVAL;
905 client->pfd.revents = 0;
906 return poll(&(client->pfd), 1, 0);
912 struct crm_ipc_response_header *header = (
struct crm_ipc_response_header *)(
void*)client->buffer;
914 if (header->size_compressed) {
916 unsigned int size_u = 1 + header->size_uncompressed;
918 unsigned int new_buf_size = QB_MAX((hdr_offset + size_u), client->max_buf_size);
919 char *uncompressed = calloc(1, new_buf_size);
921 crm_trace(
"Decompressing message data %u bytes into %u bytes",
922 header->size_compressed, size_u);
924 rc = BZ2_bzBuffToBuffDecompress(uncompressed + hdr_offset, &size_u,
925 client->buffer + hdr_offset, header->size_compressed, 1, 0);
941 CRM_ASSERT(size_u == header->size_uncompressed);
943 memcpy(uncompressed, client->buffer, hdr_offset);
944 header = (
struct crm_ipc_response_header *)(
void*)uncompressed;
946 free(client->buffer);
947 client->buf_size = new_buf_size;
948 client->buffer = uncompressed;
951 CRM_ASSERT(client->buffer[hdr_offset + header->size_uncompressed - 1] == 0);
958 struct crm_ipc_response_header *header = NULL;
966 client->buffer[0] = 0;
967 client->msg_size = qb_ipcc_event_recv(client->ipc, client->buffer, client->buf_size - 1, 0);
968 if (client->msg_size >= 0) {
969 int rc = crm_ipc_decompress(client);
975 header = (
struct crm_ipc_response_header *)(
void*)client->buffer;
977 crm_err(
"Filtering incompatible v%d IPC message, we only support versions <= %d",
982 crm_trace(
"Received %s event %d, size=%u, rc=%d, text: %.100s",
983 client->name, header->qb.id, header->qb.size, client->msg_size,
984 client->buffer + hdr_offset);
991 crm_err(
"Connection to %s failed", client->name);
996 return header->size_uncompressed;
1005 return client->buffer +
sizeof(
struct crm_ipc_response_header);
1011 struct crm_ipc_response_header *header = NULL;
1014 if (client->buffer == NULL) {
1018 header = (
struct crm_ipc_response_header *)(
void*)client->buffer;
1019 return header->flags;
1026 return client->name;
1030 internal_ipc_send_recv(
crm_ipc_t * client,
const void *iov)
1035 rc = qb_ipcc_sendv_recv(client->ipc, iov, 2, client->buffer, client->buf_size, -1);
1042 internal_ipc_send_request(
crm_ipc_t * client,
const void *iov,
int ms_timeout)
1045 time_t timeout = time(NULL) + 1 + (ms_timeout / 1000);
1048 rc = qb_ipcc_sendv(client->ipc, iov, 2);
1055 internal_ipc_get_reply(
crm_ipc_t * client,
int request_id,
int ms_timeout)
1057 time_t timeout = time(NULL) + 1 + (ms_timeout / 1000);
1063 crm_trace(
"client %s waiting on reply to msg id %d", client->name, request_id);
1066 rc = qb_ipcc_recv(client->ipc, client->buffer, client->buf_size, 1000);
1068 struct crm_ipc_response_header *hdr = NULL;
1070 int rc = crm_ipc_decompress(client);
1076 hdr = (
struct crm_ipc_response_header *)(
void*)client->buffer;
1077 if (hdr->qb.id == request_id) {
1080 }
else if (hdr->qb.id < request_id) {
1083 crm_err(
"Discarding old reply %d (need %d)", hdr->qb.id, request_id);
1089 crm_err(
"Discarding newer reply %d (need %d)", hdr->qb.id, request_id);
1094 crm_err(
"Server disconnected client %s while waiting for msg id %d", client->name,
1099 }
while (time(NULL) < timeout);
1111 static int factor = 8;
1112 struct crm_ipc_response_header *header;
1116 if (client == NULL) {
1122 crm_notice(
"Connection to %s closed", client->name);
1126 if (ms_timeout == 0) {
1130 if (client->need_reply) {
1131 crm_trace(
"Trying again to obtain pending reply from %s", client->name);
1132 rc = qb_ipcc_recv(client->ipc, client->buffer, client->buf_size, ms_timeout);
1134 crm_warn(
"Sending to %s (%p) is disabled until pending reply is received", client->name,
1139 crm_notice(
"Lost reply from %s (%p) finally arrived, sending re-enabled", client->name,
1141 client->need_reply = FALSE;
1152 header = iov[0].iov_base;
1153 header->flags |=
flags;
1160 if(header->size_compressed) {
1161 if(factor < 10 && (client->max_buf_size / 10) < (rc / factor)) {
1162 crm_notice(
"Compressed message exceeds %d0%% of the configured ipc limit (%u bytes), " 1163 "consider setting PCMK_ipc_buffer to %u or higher",
1164 factor, client->max_buf_size, 2 * client->max_buf_size);
1169 crm_trace(
"Sending from client: %s request id: %d bytes: %u timeout:%d msg...",
1170 client->name, header->qb.id, header->qb.size, ms_timeout);
1174 rc = internal_ipc_send_request(client, iov, ms_timeout);
1177 crm_trace(
"Failed to send from client %s request %d with %u bytes...",
1178 client->name, header->qb.id, header->qb.size);
1182 crm_trace(
"Message sent, not waiting for reply to %d from %s to %u bytes...",
1183 header->qb.id, client->name, header->qb.size);
1188 rc = internal_ipc_get_reply(client, header->qb.id, ms_timeout);
1197 client->need_reply = TRUE;
1201 rc = internal_ipc_send_recv(client, iov);
1205 struct crm_ipc_response_header *hdr = (
struct crm_ipc_response_header *)(
void*)client->buffer;
1207 crm_trace(
"Received response %d, size=%u, rc=%ld, text: %.200s", hdr->qb.id, hdr->qb.size,
1215 crm_trace(
"Response not received: rc=%ld, errno=%d", rc, errno);
1222 }
else if (rc == -ETIMEDOUT) {
1223 crm_warn(
"Request %d to %s (%p) failed: %s (%ld) after %dms",
1224 header->qb.id, client->name, client->ipc,
pcmk_strerror(rc), rc, ms_timeout);
1227 }
else if (rc <= 0) {
1228 crm_warn(
"Request %d to %s (%p) failed: %s (%ld)",
1229 header->qb.id, client->name, client->ipc,
pcmk_strerror(rc), rc);
1233 free(iov[1].iov_base);
1242 const char *client_name,
const char *major_version,
const char *minor_version)
1244 xmlNode *hello_node = NULL;
1245 xmlNode *hello = NULL;
1247 if (uuid == NULL || strlen(uuid) == 0
1248 || client_name == NULL || strlen(client_name) == 0
1249 || major_version == NULL || strlen(major_version) == 0
1250 || minor_version == NULL || strlen(minor_version) == 0) {
1251 crm_err(
"Missing fields, Hello message will not be valid.");
1256 crm_xml_add(hello_node,
"major_version", major_version);
1257 crm_xml_add(hello_node,
"minor_version", minor_version);
1258 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)
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.
bool crm_compress_string(const char *data, int length, int max, char **result, unsigned int *result_len)
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)
#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