/******************************************************************************
* *
* Function: node_history *
* *
* Purpose: process new history received from a slave node *
* *
* Parameters: *
* *
* Return value: SUCCEED - processed successfully *
* FAIL - an error occurred *
* *
* Author: Alexei Vladishev *
* *
* Comments: *
* *
******************************************************************************/
int node_history(char *data, size_t datalen)
{
const char *r;
char *newline = NULL;
char *pos;
int sender_nodeid = 0, nodeid = 0, firstline = 1, events = 0, history = 0, acknowledges = 0;
const ZBX_TABLE *table_sync = NULL, *table = NULL;
int res = SUCCEED;
char *sql1 = NULL, *sql2 = NULL, *sql3 = NULL;
size_t sql1_alloc, sql2_alloc, sql3_alloc;
size_t sql1_offset, sql2_offset, sql3_offset;
zbx_vector_uint64_t ack_eventids;
assert(data);
zabbix_log(LOG_LEVEL_DEBUG, "In node_history()");
buffer_alloc = 4 * ZBX_KIBIBYTE;
sql1_alloc = 32 * ZBX_KIBIBYTE;
sql2_alloc = 32 * ZBX_KIBIBYTE;
sql3_alloc = 32 * ZBX_KIBIBYTE;
tmp_alloc = 4 * ZBX_KIBIBYTE;
buffer = zbx_malloc(buffer, buffer_alloc);
sql1 = zbx_malloc(sql1, sql1_alloc);
sql2 = zbx_malloc(sql2, sql2_alloc);
sql3 = zbx_malloc(sql3, sql3_alloc);
tmp = zbx_malloc(tmp, tmp_alloc);
zbx_vector_uint64_create(&ack_eventids);
DBbegin();
for (r = data; *r != '\0' && res == SUCCEED;)
{
if (NULL != (newline = strchr(r, '\n')))
*newline = '\0';
if (1 == firstline)
{
zbx_get_next_field(&r, &buffer, &buffer_alloc, ZBX_DM_DELIMITER); /* constant 'History' */
zbx_get_next_field(&r, &buffer, &buffer_alloc, ZBX_DM_DELIMITER); /* sender_nodeid */
sender_nodeid=atoi(buffer);
zbx_get_next_field(&r, &buffer, &buffer_alloc, ZBX_DM_DELIMITER); /* nodeid */
nodeid=atoi(buffer);
zbx_get_next_field(&r, &buffer, &buffer_alloc, ZBX_DM_DELIMITER); /* tablename */
if (FAIL == is_direct_slave_node(sender_nodeid))
{
zabbix_log(LOG_LEVEL_ERR, "NODE %d: Received data from node %d"
" that is not a direct slave node",
CONFIG_NODEID, sender_nodeid);
res = FAIL;
}
if (FAIL == is_slave_node(CONFIG_NODEID, nodeid))
{
zabbix_log(LOG_LEVEL_ERR, "NODE %d: Received history for unknown slave node %d",
CONFIG_NODEID, nodeid);
res = FAIL;
}
table = DBget_table(buffer);
if (NULL != table && 0 == (table->flags & (ZBX_HISTORY | ZBX_HISTORY_SYNC)))
table = NULL;
if (NULL != table && 0 != (table->flags & ZBX_HISTORY_SYNC))
{
table_sync = table;
if (NULL != (pos = strstr(buffer, "_sync")))
{
*pos = '\0';
table = DBget_table(buffer);
}
}
if (NULL == table)
{
zabbix_log(LOG_LEVEL_ERR, "NODE %d: Invalid received data: unknown tablename \"%s\"",
CONFIG_NODEID, buffer);
res = FAIL;
}
else
{
if (0 == strcmp(table->table, "events"))
events = 1;
if (0 == strncmp(table->table, "history", 7))
history = 1;
if (0 == strcmp(table->table, "acknowledges"))
acknowledges = 1;
}
if (NULL != newline)
{
zabbix_log(LOG_LEVEL_WARNING, "NODE %d: Received %s from node %d for node %d datalen " ZBX_FS_SIZE_T,
CONFIG_NODEID, buffer, sender_nodeid, nodeid, (zbx_fs_size_t)datalen);
}
firstline = 0;
sql1_offset = 0;
sql2_offset = 0;
sql3_offset = 0;
}
else if (NULL != table)
{
if (events)
{
res = process_record_event(sender_nodeid, nodeid, table, r);
}
else
{
res = process_record(&sql1, &sql1_alloc, &sql1_offset, sender_nodeid,
nodeid, table, r, newline ? 0 : 1, acknowledges, &ack_eventids);
if (SUCCEED == res && 0 != history)
{
res = process_items(&sql2, &sql2_alloc, &sql2_offset, sender_nodeid,
nodeid, table, r, newline ? 0 : 1);
}
if (SUCCEED == res && NULL != table_sync && 0 != CONFIG_MASTER_NODEID)
{
res = process_record(&sql3, &sql3_alloc, &sql3_offset, sender_nodeid,
nodeid, table_sync, r, newline ? 0 : 1, 0, NULL);
}
}
}
if (newline != NULL)
{
*newline = '\n';
r = newline + 1;
}
else
break;
}
if (SUCCEED == res)
DBcommit();
else
DBrollback();
zbx_vector_uint64_destroy(&ack_eventids);
zbx_free(tmp);
zbx_free(sql1);
zbx_free(sql2);
zbx_free(sql3);
zbx_free(buffer);
return res;
}
/******************************************************************************
* *
* Function: send_history_last_id *
* *
* Purpose: send list of last historical tables IDs *
* *
* Parameters: sock - opened socket of node-node connection *
* record *
* *
* Return value: SUCCEED - sent successfully *
* FAIL - an error occurred *
* *
* Author: Alexander Vladishev *
* *
* Comments: *
* *
******************************************************************************/
int send_history_last_id(zbx_sock_t *sock, const char *data)
{
DB_RESULT result;
DB_ROW row;
const char *r;
const ZBX_TABLE *table;
size_t buffer_offset;
int sender_nodeid = (-1), nodeid = (-1), res;
zabbix_log(LOG_LEVEL_DEBUG, "In send_history_last_id()");
buffer_alloc = 320;
buffer = zbx_malloc(buffer, buffer_alloc);
r = data;
if (NULL == r)
goto error;
zbx_get_next_field(&r, &buffer, &buffer_alloc, ZBX_DM_DELIMITER); /* constant 'ZBX_GET_HISTORY_LAST_ID' */
if (NULL == r)
goto error;
zbx_get_next_field(&r, &buffer, &buffer_alloc, ZBX_DM_DELIMITER); /* sender_nodeid */
sender_nodeid = atoi(buffer);
if (NULL == r)
goto error;
if (FAIL == is_direct_slave_node(sender_nodeid))
{
zabbix_log(LOG_LEVEL_ERR, "NODE %d: Received data from node %d that is not a direct slave node [%s]",
CONFIG_NODEID, sender_nodeid, data);
goto fail;
}
zbx_get_next_field(&r, &buffer, &buffer_alloc, '\n'); /* nodeid */
nodeid = atoi(buffer);
if (NULL == r)
goto error;
if (FAIL == is_slave_node(CONFIG_NODEID, nodeid))
{
zabbix_log(LOG_LEVEL_ERR, "NODE %d: Received data for unknown slave node %d [%s]",
CONFIG_NODEID, nodeid, data);
goto fail;
}
zbx_get_next_field(&r, &buffer, &buffer_alloc, ZBX_DM_DELIMITER); /* table name */
if (NULL == (table = DBget_table(buffer)))
goto error;
if (0 == (table->flags & ZBX_HISTORY))
goto error;
if (NULL == r)
goto error;
zbx_get_next_field(&r, &buffer, &buffer_alloc, ZBX_DM_DELIMITER); /* field name */
if (0 != strcmp(buffer, table->recid))
goto error;
buffer_offset= 0;
zbx_snprintf_alloc(&buffer, &buffer_alloc, &buffer_offset,
"select max(%s)"
" from %s"
" where 1=1" DB_NODE,
table->recid,
table->table,
DBnode(table->recid, nodeid));
buffer_offset= 0;
result = DBselect("%s", buffer);
if (NULL != (row = DBfetch(result)))
zbx_strcpy_alloc(&buffer, &buffer_alloc, &buffer_offset, SUCCEED == DBis_null(row[0]) ? "0" : row[0]);
DBfree_result(result);
if (buffer_offset == 0)
goto error;
alarm(CONFIG_TIMEOUT);
res = send_data_to_node(sender_nodeid, sock, buffer);
alarm(0);
zbx_free(buffer);
return res;
error:
zabbix_log(LOG_LEVEL_ERR, "NODE %d: Received invalid record from node %d for node %d [%s]",
CONFIG_NODEID, sender_nodeid, nodeid, data);
fail:
buffer_offset= 0;
zbx_strcpy_alloc(&buffer, &buffer_alloc, &buffer_offset, "FAIL");
alarm(CONFIG_TIMEOUT);
res = send_data_to_node(sender_nodeid, sock, buffer);
alarm(0);
zbx_free(buffer);
return FAIL;
}
/******************************************************************************
* *
* Function: node_sync *
* *
* Purpose: process configuration changes received from a node *
* *
* Parameters: *
* *
* Return value: SUCCEED - processed successfully *
* FAIL - an error occurred *
* *
* Author: Alexei Vladishev *
* *
* Comments: *
* *
******************************************************************************/
int node_sync(char *data, int *sender_nodeid, int *nodeid)
{
const char *r;
char *lf;
int datalen, res = SUCCEED;
unsigned char sender_nodetype;
datalen = strlen(data);
zabbix_log(LOG_LEVEL_DEBUG, "In node_sync() len:%d", datalen);
tmp = zbx_malloc(tmp, tmp_alloc);
if (NULL != (lf = strchr(data, '\n')))
*lf = '\0';
r = data;
zbx_get_next_field(&r, &tmp, &tmp_alloc, ZBX_DM_DELIMITER); /* Data */
zbx_get_next_field(&r, &tmp, &tmp_alloc, ZBX_DM_DELIMITER);
*sender_nodeid = atoi(tmp);
sender_nodetype = (*sender_nodeid == CONFIG_MASTER_NODEID) ? ZBX_NODE_MASTER : ZBX_NODE_SLAVE;
zbx_get_next_field(&r, &tmp, &tmp_alloc, ZBX_DM_DELIMITER);
*nodeid = atoi(tmp);
if (0 != *sender_nodeid && 0 != *nodeid)
{
if (CONFIG_MASTER_NODEID != *sender_nodeid && FAIL == is_direct_slave_node(*sender_nodeid))
{
zabbix_log(LOG_LEVEL_ERR, "NODE %d: Received configuration changes from unknown node %d",
CONFIG_NODEID, *sender_nodeid);
res = FAIL;
goto quit;
}
if (CONFIG_MASTER_NODEID != *sender_nodeid && CONFIG_NODEID == *nodeid)
{
zabbix_log(LOG_LEVEL_ERR, "NODE %d: Received configuration changes for this node from a non-master node %d",
CONFIG_NODEID, *sender_nodeid);
res = FAIL;
goto quit;
}
if (CONFIG_NODEID != *nodeid && FAIL == is_slave_node(CONFIG_NODEID, *nodeid))
{
zabbix_log(LOG_LEVEL_ERR, "NODE %d: Received configuration changes for unknown node %d",
CONFIG_NODEID, *nodeid);
res = FAIL;
goto quit;
}
zabbix_log(LOG_LEVEL_WARNING, "NODE %d: Received configuration changes from %s node %d for node %d datalen %d",
CONFIG_NODEID, zbx_nodetype_string(sender_nodetype), *sender_nodeid, *nodeid, datalen);
DBexecute("delete from node_cksum where nodeid=%d and cksumtype=%d",
*nodeid,
NODE_CKSUM_TYPE_NEW);
if (lf != NULL)
{
*lf++ = '\n';
data = lf;
buf = zbx_malloc(buf, buf_alloc);
process_updated_records(*nodeid, data);
process_deleted_records(*nodeid, data);
process_checksum(*nodeid, data, sender_nodetype);
zbx_free(buf);
}
}
quit:
zbx_free(tmp);
return res;
}
