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/*
* Copyright (C) 2004 Andrew Beekhof <andrew@beekhof.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <crm_internal.h>
#include <bzlib.h>
#include <crm/ais.h>
#include <crm/common/cluster.h>
#include <sys/utsname.h>
#include "stack.h"
#ifdef AIS_COROSYNC
# include <corosync/corodefs.h>
#endif
enum crm_ais_msg_types text2msg_type(const char *text)
{
int type = crm_msg_none;
CRM_CHECK(text != NULL, return type);
if(safe_str_eq(text, "ais")) {
type = crm_msg_ais;
} else if(safe_str_eq(text, "crm_plugin")) {
type = crm_msg_ais;
} else if(safe_str_eq(text, CRM_SYSTEM_CIB)) {
type = crm_msg_cib;
} else if(safe_str_eq(text, CRM_SYSTEM_CRMD)) {
type = crm_msg_crmd;
} else if(safe_str_eq(text, CRM_SYSTEM_DC)) {
type = crm_msg_crmd;
} else if(safe_str_eq(text, CRM_SYSTEM_TENGINE)) {
type = crm_msg_te;
} else if(safe_str_eq(text, CRM_SYSTEM_PENGINE)) {
type = crm_msg_pe;
} else if(safe_str_eq(text, CRM_SYSTEM_LRMD)) {
type = crm_msg_lrmd;
} else if(safe_str_eq(text, CRM_SYSTEM_STONITHD)) {
type = crm_msg_stonithd;
} else if(safe_str_eq(text, "attrd")) {
type = crm_msg_attrd;
} else {
/* This will normally be a transient client rather than
* a cluster daemon. Set the type to the pid of the client
*/
int scan_rc = sscanf(text, "%d", &type);
if(scan_rc != 1) {
/* Ensure its sane */
type = crm_msg_none;
}
}
return type;
}
char *get_ais_data(const AIS_Message *msg)
{
int rc = BZ_OK;
char *uncompressed = NULL;
unsigned int new_size = msg->size + 1;
if(msg->is_compressed == FALSE) {
crm_debug_2("Returning uncompressed message data");
uncompressed = strdup(msg->data);
} else {
crm_debug_2("Decompressing message data");
crm_malloc0(uncompressed, new_size);
rc = BZ2_bzBuffToBuffDecompress(
uncompressed, &new_size, (char*)msg->data, msg->compressed_size, 1, 0);
CRM_ASSERT(rc = BZ_OK);
CRM_ASSERT(new_size == msg->size);
}
return uncompressed;
}
#if SUPPORT_AIS
int ais_fd_sync = -1;
int ais_fd_async = -1; /* never send messages via this channel */
void *ais_ipc_ctx = NULL;
#ifdef AIS_COROSYNC
# ifndef TRADITIONAL_AIS_IPC
hdb_handle_t ais_ipc_handle = 0;
# endif
#endif
GFDSource *ais_source = NULL;
GFDSource *ais_source_sync = NULL;
static char *ais_cluster_name = NULL;
gboolean get_ais_nodeid(uint32_t *id, char **uname)
{
struct iovec iov;
int retries = 0;
int rc = CS_OK;
coroipc_response_header_t header;
struct crm_ais_nodeid_resp_s answer;
header.error = CS_OK;
header.id = crm_class_nodeid;
header.size = sizeof(coroipc_response_header_t);
CRM_CHECK(id != NULL, return FALSE);
CRM_CHECK(uname != NULL, return FALSE);
iov.iov_base = &header;
iov.iov_len = header.size;
retry:
errno = 0;
#ifdef TRADITIONAL_AIS_IPC
rc = saSendReceiveReply(ais_fd_sync, &header, header.size, &answer, sizeof (struct crm_ais_nodeid_resp_s));
#else
# ifdef AIS_WHITETANK
rc = openais_msg_send_reply_receive(
ais_ipc_ctx, &iov, 1, &answer, sizeof (answer));
# else
rc = coroipcc_msg_send_reply_receive(
ais_ipc_handle, &iov, 1, &answer, sizeof (answer));
# endif
#endif
if(rc == CS_OK) {
CRM_CHECK(answer.header.size == sizeof (struct crm_ais_nodeid_resp_s),
crm_err("Odd message: id=%d, size=%d, error=%d",
answer.header.id, answer.header.size, answer.header.error));
CRM_CHECK(answer.header.id == crm_class_nodeid, crm_err("Bad response id: %d", answer.header.id));
}
if(rc == CS_ERR_TRY_AGAIN && retries < 20) {
retries++;
crm_info("Peer overloaded: Re-sending message (Attempt %d of 20)", retries);
sleep(retries); /* Proportional back off */
goto retry;
}
if(rc != CS_OK) {
crm_err("Sending nodeid request: FAILED (rc=%d): %s", rc, ais_error2text(rc));
return FALSE;
} else if(answer.header.error != CS_OK) {
crm_err("Bad response from peer: (rc=%d): %s", rc, ais_error2text(rc));
return FALSE;
}
crm_info("Server details: id=%u uname=%s cname=%s",
answer.id, answer.uname, answer.cname);
*id = answer.id;
*uname = crm_strdup(answer.uname);
ais_cluster_name = crm_strdup(answer.cname);
return TRUE;
}
gboolean crm_get_cluster_name(char **cname)
{
CRM_CHECK(cname != NULL, return FALSE);
if(ais_cluster_name) {
*cname = crm_strdup(ais_cluster_name);
return TRUE;
}
return FALSE;
}
gboolean
send_ais_text(int class, const char *data,
gboolean local, const char *node, enum crm_ais_msg_types dest)
{
static int msg_id = 0;
static int local_pid = 0;
int retries = 0;
int rc = CS_OK;
int buf_len = sizeof(coroipc_response_header_t);
char *buf = NULL;
struct iovec iov;
coroipc_response_header_t *header;
AIS_Message *ais_msg = NULL;
enum crm_ais_msg_types sender = text2msg_type(crm_system_name);
/* There are only 6 handlers registered to crm_lib_service in plugin.c */
CRM_CHECK(class < 6, crm_err("Invalid message class: %d", class); return FALSE);
if(data == NULL) {
data = "";
}
if(local_pid == 0) {
local_pid = getpid();
}
if(sender == crm_msg_none) {
sender = local_pid;
}
crm_malloc0(ais_msg, sizeof(AIS_Message));
ais_msg->id = msg_id++;
ais_msg->header.id = class;
ais_msg->header.error = CS_OK;
ais_msg->host.type = dest;
ais_msg->host.local = local;
if(node) {
ais_msg->host.size = strlen(node);
memset(ais_msg->host.uname, 0, MAX_NAME);
memcpy(ais_msg->host.uname, node, ais_msg->host.size);
ais_msg->host.id = 0;
} else {
ais_msg->host.size = 0;
memset(ais_msg->host.uname, 0, MAX_NAME);
ais_msg->host.id = 0;
}
ais_msg->sender.type = sender;
ais_msg->sender.pid = local_pid;
ais_msg->sender.size = 0;
memset(ais_msg->sender.uname, 0, MAX_NAME);
ais_msg->sender.id = 0;
ais_msg->size = 1 + strlen(data);
if(ais_msg->size < CRM_BZ2_THRESHOLD) {
failback:
crm_realloc(ais_msg, sizeof(AIS_Message) + ais_msg->size);
memcpy(ais_msg->data, data, ais_msg->size);
} else {
char *compressed = NULL;
char *uncompressed = crm_strdup(data);
unsigned int len = (ais_msg->size * 1.1) + 600; /* recomended size */
crm_debug_5("Compressing message payload");
crm_malloc(compressed, len);
rc = BZ2_bzBuffToBuffCompress(
compressed, &len, uncompressed, ais_msg->size, CRM_BZ2_BLOCKS, 0, CRM_BZ2_WORK);
crm_free(uncompressed);
if(rc != BZ_OK) {
crm_err("Compression failed: %d", rc);
crm_free(compressed);
goto failback;
}
crm_realloc(ais_msg, sizeof(AIS_Message) + len + 1);
memcpy(ais_msg->data, compressed, len);
ais_msg->data[len] = 0;
crm_free(compressed);
ais_msg->is_compressed = TRUE;
ais_msg->compressed_size = len;
crm_debug_2("Compression details: %d -> %d",
ais_msg->size, ais_data_len(ais_msg));
}
ais_msg->header.size = sizeof(AIS_Message) + ais_data_len(ais_msg);
crm_debug_3("Sending%s message %d to %s.%s (data=%d, total=%d)",
ais_msg->is_compressed?" compressed":"",
ais_msg->id, ais_dest(&(ais_msg->host)), msg_type2text(dest),
ais_data_len(ais_msg), ais_msg->header.size);
iov.iov_base = ais_msg;
iov.iov_len = ais_msg->header.size;
retry:
errno = 0;
crm_realloc(buf, buf_len);
#ifdef TRADITIONAL_AIS_IPC
rc = saSendReceiveReply(ais_fd_sync, ais_msg, ais_msg->header.size, buf, buf_len);
#else
# ifdef AIS_WHITETANK
rc = openais_msg_send_reply_receive(ais_ipc_ctx, &iov, 1, buf, buf_len);
# else
rc = coroipcc_msg_send_reply_receive(ais_ipc_handle, &iov, 1, buf, buf_len);
# endif
#endif
header = (coroipc_response_header_t *)buf;
if(rc == CS_ERR_TRY_AGAIN && retries < 20) {
retries++;
crm_info("Peer overloaded: Re-sending message (Attempt %d of 20)", retries);
sleep(retries); /* Proportional back off */
goto retry;
} else if(rc == CS_OK) {
CRM_CHECK_AND_STORE(header->size == sizeof (coroipc_response_header_t),
crm_err("Odd message: id=%d, size=%d, class=%d, error=%d",
header->id, header->size, class, header->error));
if(buf_len < header->size) {
crm_err("Increasing buffer length to %d and retrying", header->size);
buf_len = header->size + 1;
goto retry;
} else if(header->id == crm_class_nodeid && header->size == sizeof (struct crm_ais_nodeid_resp_s)){
struct crm_ais_nodeid_resp_s *answer = (struct crm_ais_nodeid_resp_s *)header;
crm_err("Server details: id=%u uname=%s counter=%u", answer->id, answer->uname, answer->counter);
} else {
CRM_CHECK_AND_STORE(header->id == CRM_MESSAGE_IPC_ACK,
crm_err("Bad response id (%d) for request (%d)", header->id, ais_msg->header.id));
CRM_CHECK(header->error == CS_OK, rc = header->error);
}
}
if(rc != CS_OK) {
crm_perror(LOG_ERR,"Sending message %d: FAILED (rc=%d): %s",
ais_msg->id, rc, ais_error2text(rc));
ais_fd_async = -1;
} else {
crm_debug_4("Message %d: sent", ais_msg->id);
}
crm_free(buf);
crm_free(ais_msg);
return (rc == CS_OK);
}
gboolean
send_ais_message(xmlNode *msg,
gboolean local, const char *node, enum crm_ais_msg_types dest)
{
gboolean rc = TRUE;
char *data = NULL;
if(ais_fd_async < 0 || ais_source == NULL) {
crm_err("Not connected to AIS");
return FALSE;
}
data = dump_xml_unformatted(msg);
rc = send_ais_text(0, data, local, node, dest);
crm_free(data);
return rc;
}
void terminate_ais_connection(void)
{
#ifndef TRADITIONAL_AIS_IPC
if(ais_ipc_ctx) {
# ifdef AIS_WHITETANK
openais_service_disconnect(ais_ipc_ctx);
# else
coroipcc_service_disconnect(ais_ipc_handle);
# endif
}
#else
if(ais_fd_sync > 0) {
close(ais_fd_sync);
}
if(ais_fd_async > 0) {
close(ais_fd_async);
}
#endif
crm_notice("Disconnected from AIS");
/* G_main_del_fd(ais_source); */
/* G_main_del_fd(ais_source_sync); */
}
int ais_membership_timer = 0;
gboolean ais_membership_force = FALSE;
gboolean ais_dispatch(int sender, gpointer user_data)
{
char *data = NULL;
char *buffer = NULL;
char *uncompressed = NULL;
int rc = CS_OK;
xmlNode *xml = NULL;
AIS_Message *msg = NULL;
gboolean (*dispatch)(AIS_Message*,char*,int) = user_data;
#ifdef TRADITIONAL_AIS_IPC
coroipc_response_header_t *header = NULL;
static int header_len = sizeof(coroipc_response_header_t);
crm_malloc0(header, header_len);
buffer = (char*)header;
errno = 0;
rc = saRecvRetry(sender, header, header_len);
if (rc != CS_OK) {
crm_perror(LOG_ERR, "Receiving message header failed: (%d/%d) %s", rc, errno, ais_error2text(rc));
goto bail;
} else if(header->size == header_len) {
crm_err("Empty message: id=%d, size=%d, error=%d, header_len=%d",
header->id, header->size, header->error, header_len);
goto done;
} else if(header->size == 0 || header->size < header_len) {
crm_err("Mangled header: size=%d, header=%d, error=%d",
header->size, header_len, header->error);
goto done;
} else if(header->error != CS_OK) {
crm_err("Header contined error: %d", header->error);
}
crm_debug_2("Looking for %d (%d - %d) more bytes",
header->size - header_len, header->size, header_len);
crm_realloc(header, header->size);
/* Use a char* so we can store the remainder into an offset */
buffer = (char*)header;
errno = 0;
rc = saRecvRetry(sender, buffer+header_len, header->size - header_len);
#else
# ifdef AIS_WHITETANK
crm_malloc0(buffer, 1000000);
rc = openais_dispatch_recv (ais_ipc_ctx, buffer, 0);
# else
rc = coroipcc_dispatch_get (ais_ipc_handle, (void**)&buffer, 0);
# endif
#endif
if (rc == 0) {
/* Zero is a legal "no message afterall" value */
goto done;
} else if (rc != CS_OK) {
crm_perror(LOG_ERR,"Receiving message body failed: (%d) %s", rc, ais_error2text(rc));
goto bail;
}
msg = (AIS_Message*)buffer;
crm_debug_3("Got new%s message (size=%d, %d, %d)",
msg->is_compressed?" compressed":"",
ais_data_len(msg), msg->size, msg->compressed_size);
data = msg->data;
if(msg->is_compressed && msg->size > 0) {
int rc = BZ_OK;
unsigned int new_size = msg->size + 1;
if(check_message_sanity(msg, NULL) == FALSE) {
goto badmsg;
}
crm_debug_5("Decompressing message data");
crm_malloc0(uncompressed, new_size);
rc = BZ2_bzBuffToBuffDecompress(
uncompressed, &new_size, data, msg->compressed_size, 1, 0);
if(rc != BZ_OK) {
crm_err("Decompression failed: %d", rc);
goto badmsg;
}
CRM_ASSERT(rc == BZ_OK);
CRM_ASSERT(new_size == msg->size);
data = uncompressed;
} else if(check_message_sanity(msg, data) == FALSE) {
goto badmsg;
} else if(safe_str_eq("identify", data)) {
int pid = getpid();
char *pid_s = crm_itoa(pid);
send_ais_text(0, pid_s, TRUE, NULL, crm_msg_ais);
crm_free(pid_s);
goto done;
}
if(msg->header.id != crm_class_members) {
crm_update_peer(msg->sender.id, 0,0,0,0, msg->sender.uname, msg->sender.uname, NULL, NULL);
}
if(msg->header.id == crm_class_rmpeer) {
uint32_t id = crm_int_helper(data, NULL);
crm_info("Removing peer %s/%u", data, id);
reap_crm_member(id);
goto done;
} else if(msg->header.id == crm_class_members
|| msg->header.id == crm_class_quorum) {
const char *value = NULL;
gboolean quorate = FALSE;
xml = string2xml(data);
if(xml == NULL) {
crm_err("Invalid membership update: %s", data);
goto badmsg;
}
value = crm_element_value(xml, "quorate");
CRM_CHECK(value != NULL, crm_log_xml_err(xml, "No quorum value:"); goto badmsg);
if(crm_is_true(value)) {
quorate = TRUE;
}
value = crm_element_value(xml, "id");
CRM_CHECK(value != NULL, crm_log_xml_err(xml, "No membership id"); goto badmsg);
crm_peer_seq = crm_int_helper(value, NULL);
if(quorate != crm_have_quorum) {
crm_notice("Membership %s: quorum %s", value, quorate?"acquired":"lost");
crm_have_quorum = quorate;
} else {
crm_info("Membership %s: quorum %s", value, quorate?"retained":"still lost");
}
xml_child_iter(xml, node, crm_update_ais_node(node, crm_peer_seq));
}
if(dispatch != NULL) {
dispatch(msg, data, sender);
}
done:
crm_free(uncompressed);
free_xml(xml);
#ifdef AIS_COROSYNC
# ifndef TRADITIONAL_AIS_IPC
coroipcc_dispatch_put (ais_ipc_handle);
buffer = NULL;
# endif
#endif
crm_free(buffer);
return TRUE;
badmsg:
crm_err("Invalid message (id=%d, dest=%s:%s, from=%s:%s.%d):"
" min=%d, total=%d, size=%d, bz2_size=%d",
msg->id, ais_dest(&(msg->host)), msg_type2text(msg->host.type),
ais_dest(&(msg->sender)), msg_type2text(msg->sender.type),
msg->sender.pid, (int)sizeof(AIS_Message),
msg->header.size, msg->size, msg->compressed_size);
goto done;
bail:
crm_err("AIS connection failed");
#ifdef AIS_COROSYNC
# ifndef TRADITIONAL_AIS_IPC
buffer = NULL;
# endif
#endif
crm_free(buffer);
return FALSE;
}
static void
ais_destroy(gpointer user_data)
{
crm_err("AIS connection terminated");
ais_fd_sync = -1;
exit(1);
}
gboolean init_ais_connection(
gboolean (*dispatch)(AIS_Message*,char*,int),
void (*destroy)(gpointer), char **our_uuid, char **our_uname, int *nodeid)
{
int retries = 0;
while(retries++ < 30) {
int rc = init_ais_connection_once(dispatch, destroy, our_uuid, our_uname, nodeid);
switch(rc) {
case CS_OK:
return TRUE;
break;
case CS_ERR_TRY_AGAIN:
break;
default:
return FALSE;
}
}
crm_err("Retry count exceeded: %d", retries);
return FALSE;
}
gboolean init_ais_connection_once(
gboolean (*dispatch)(AIS_Message*,char*,int),
void (*destroy)(gpointer), char **our_uuid, char **our_uname, int *nodeid)
{
int pid = 0;
int rc = CS_OK;
char *pid_s = NULL;
struct utsname name;
uint32_t local_nodeid = 0;
char *local_uname = NULL;
crm_info("Creating connection to our AIS plugin");
#ifdef TRADITIONAL_AIS_IPC
rc = saServiceConnect (&ais_fd_sync, &ais_fd_async, PCMK_SERVICE_ID);
#else
# ifdef AIS_WHITETANK
rc = openais_service_connect(PCMK_SERVICE_ID, &ais_ipc_ctx);
if(ais_ipc_ctx) {
ais_fd_async = openais_fd_get(ais_ipc_ctx);
}
# else
rc = coroipcc_service_connect(
COROSYNC_SOCKET_NAME, PCMK_SERVICE_ID,
AIS_IPC_MESSAGE_SIZE, AIS_IPC_MESSAGE_SIZE, AIS_IPC_MESSAGE_SIZE,
&ais_ipc_handle);
if(ais_ipc_handle) {
coroipcc_fd_get(ais_ipc_handle, &ais_fd_async);
}
# endif
#endif
if(ais_fd_async <= 0 && rc == CS_OK) {
crm_err("No context created, but connection reported 'ok'");
rc = CS_ERR_LIBRARY;
}
if (rc != CS_OK) {
crm_info("Connection to our AIS plugin (%d) failed: %s (%d)", PCMK_SERVICE_ID, ais_error2text(rc), rc);
}
if(rc != CS_OK) {
return rc;
}
if(destroy == NULL) {
destroy = ais_destroy;
}
crm_info("AIS connection established");
pid = getpid();
pid_s = crm_itoa(pid);
send_ais_text(0, pid_s, TRUE, NULL, crm_msg_ais);
crm_free(pid_s);
crm_peer_init();
get_ais_nodeid(&local_nodeid, &local_uname);
if(uname(&name) < 0) {
crm_perror(LOG_ERR,"uname(2) call failed");
exit(100);
}
if(safe_str_neq(name.nodename, local_uname)) {
crm_crit("Node name mismatch! OpenAIS supplied %s, our lookup returned %s", local_uname, name.nodename);
crm_notice("Node name mismatches usually occur when assigned automatically by DHCP servers");
crm_notice("If this node was part of the cluster with a different name,"
" you will need to remove the old entry with crm_node --remove");
}
if(our_uuid != NULL) {
*our_uuid = crm_strdup(local_uname);
}
if(our_uname != NULL) {
*our_uname = local_uname;
}
if(nodeid != NULL) {
*nodeid = local_nodeid;
}
if(local_nodeid != 0) {
/* Ensure the local node always exists */
crm_update_peer(local_nodeid, 0, 0, 0, 0, local_uname, local_uname, NULL, NULL);
}
if(dispatch) {
ais_source = G_main_add_fd(
G_PRIORITY_HIGH, ais_fd_async, FALSE, ais_dispatch, dispatch, destroy);
}
return TRUE;
}
gboolean check_message_sanity(const AIS_Message *msg, const char *data)
{
gboolean sane = TRUE;
gboolean repaired = FALSE;
int dest = msg->host.type;
int tmp_size = msg->header.size - sizeof(AIS_Message);
if(sane && msg->header.size == 0) {
crm_warn("Message with no size");
sane = FALSE;
}
if(sane && msg->header.error != CS_OK) {
crm_warn("Message header contains an error: %d", msg->header.error);
sane = FALSE;
}
if(sane && ais_data_len(msg) != tmp_size) {
crm_warn("Message payload size is incorrect: expected %d, got %d", ais_data_len(msg), tmp_size);
sane = TRUE;
}
if(sane && ais_data_len(msg) == 0) {
crm_warn("Message with no payload");
sane = FALSE;
}
if(sane && data && msg->is_compressed == FALSE) {
int str_size = strlen(data) + 1;
if(ais_data_len(msg) != str_size) {
int lpc = 0;
crm_warn("Message payload is corrupted: expected %d bytes, got %d",
ais_data_len(msg), str_size);
sane = FALSE;
for(lpc = (str_size - 10); lpc < msg->size; lpc++) {
if(lpc < 0) {
lpc = 0;
}
crm_debug("bad_data[%d]: %d / '%c'", lpc, data[lpc], data[lpc]);
}
}
}
if(sane == FALSE) {
crm_err("Invalid message %d: (dest=%s:%s, from=%s:%s.%d, compressed=%d, size=%d, total=%d)",
msg->id, ais_dest(&(msg->host)), msg_type2text(dest),
ais_dest(&(msg->sender)), msg_type2text(msg->sender.type),
msg->sender.pid, msg->is_compressed, ais_data_len(msg),
msg->header.size);
} else if(repaired) {
crm_err("Repaired message %d: (dest=%s:%s, from=%s:%s.%d, compressed=%d, size=%d, total=%d)",
msg->id, ais_dest(&(msg->host)), msg_type2text(dest),
ais_dest(&(msg->sender)), msg_type2text(msg->sender.type),
msg->sender.pid, msg->is_compressed, ais_data_len(msg),
msg->header.size);
} else {
crm_debug_3("Verfied message %d: (dest=%s:%s, from=%s:%s.%d, compressed=%d, size=%d, total=%d)",
msg->id, ais_dest(&(msg->host)), msg_type2text(dest),
ais_dest(&(msg->sender)), msg_type2text(msg->sender.type),
msg->sender.pid, msg->is_compressed, ais_data_len(msg),
msg->header.size);
}
return sane;
}
#endif
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