/*
** Zabbix
** Copyright (C) 2001-2022 Zabbix SIA
**
** 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 of the License, or
** (at your option) any later version.
**
** This program 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 program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
#include "preproc_manager.h"
#include "daemon.h"
#include "zbxself.h"
#include "log.h"
#include "zbxlld.h"
#include "preprocessing.h"
#include "preproc_history.h"
#include "../../libs/zbxalgo/vectorimpl.h"
#include "preproc_manager.h"
extern ZBX_THREAD_LOCAL unsigned char process_type;
extern unsigned char program_type;
extern ZBX_THREAD_LOCAL int server_num, process_num;
extern int CONFIG_PREPROCESSOR_FORKS;
#define ZBX_PREPROCESSING_MANAGER_DELAY 1
#define ZBX_PREPROC_PRIORITY_NONE 0
#define ZBX_PREPROC_PRIORITY_FIRST 1
typedef enum
{
REQUEST_STATE_QUEUED = 0, /* requires preprocessing */
REQUEST_STATE_PROCESSING = 1, /* is being preprocessed */
REQUEST_STATE_DONE = 2, /* value is set, waiting for flush */
REQUEST_STATE_PENDING = 3, /* value requires preprocessing, */
/* but is waiting on other request to complete */
}
zbx_preprocessing_states_t;
typedef enum
{
ZBX_PREPROC_ITEM, /* item preprocessing request */
ZBX_PREPROC_DEPS /* dependent item preprocessing request */
}
zbx_preprocessing_kind_t;
typedef struct zbx_preprocessing_request_base zbx_preprocessing_request_base_t;
ZBX_PTR_VECTOR_DECL(preprocessing_request_base, zbx_preprocessing_request_base_t *)
ZBX_PTR_VECTOR_IMPL(preprocessing_request_base, zbx_preprocessing_request_base_t *)
struct zbx_preprocessing_request_base
{
zbx_preprocessing_kind_t kind;
zbx_preprocessing_states_t state;
zbx_preprocessing_request_base_t *pending; /* the request waiting on this request to complete */
zbx_vector_preprocessing_request_base_t flush_queue; /* processed request waiting to be flushed */
};
/* preprocessing request */
typedef struct preprocessing_request
{
zbx_preprocessing_request_base_t base; /* common data for various requests - must be first */
/* field preprocessing request structure */
zbx_preproc_item_value_t value; /* unpacked item value */
zbx_preproc_op_t *steps; /* preprocessing steps */
int steps_num; /* number of preprocessing steps */
unsigned char value_type; /* value type from configuration */
/* at the beginning of preprocessing queue */
}
zbx_preprocessing_request_t;
/* bulk dependent item preprocessing request*/
typedef struct
{
zbx_preprocessing_request_base_t base; /* common data for various requests - must be first */
/* field preprocessing request structure */
zbx_uint64_t hostid;
zbx_uint64_t master_itemid;
unsigned char value_type; /* value type for items without preproc config */
/* inherited from master item */
zbx_variant_t value;
zbx_timespec_t ts;
zbx_vector_ipcmsg_t messages; /* IPC messages with dependent item preproc data */
zbx_preproc_dep_result_t *results;
int results_alloc;
int results_offset;
}
zbx_preprocessing_dep_request_t;
/* preprocessing worker data */
typedef struct
{
zbx_ipc_client_t *client; /* the connected preprocessing worker client */
void *task; /* the current task data */
}
zbx_preprocessing_worker_t;
/* item link index */
typedef struct
{
zbx_uint64_t itemid; /* item id */
zbx_preprocessing_kind_t kind;
zbx_list_item_t *queue_item; /* queued item */
}
zbx_item_link_t;
/* direct request to be forwarded to worker, bypassing the preprocessing queue */
typedef struct
{
zbx_ipc_client_t *client; /* the IPC client sending forward message to worker */
zbx_ipc_message_t message;
}
zbx_preprocessing_direct_request_t;
/* preprocessing manager data */
typedef struct
{
zbx_preprocessing_worker_t *workers; /* preprocessing worker array */
int worker_count; /* preprocessing worker count */
zbx_list_t queue; /* queue of item values */
zbx_hashset_t item_config; /* item configuration L2 cache */
zbx_hashset_t history_cache; /* item value history cache */
zbx_hashset_t linked_items; /* linked items placed in queue */
int cache_ts; /* cache timestamp */
zbx_uint64_t processed_num; /* processed value counter */
zbx_uint64_t queued_num; /* queued value counter */
zbx_uint64_t preproc_num; /* queued values with preprocessing steps */
zbx_list_iterator_t priority_tail; /* iterator to the last queued priority item */
zbx_list_t direct_queue; /* Queue of external requests that have to be */
/* forwarded to workers for preprocessing. */
}
zbx_preprocessing_manager_t;
static void preprocessor_enqueue_dependent(zbx_preprocessing_manager_t *manager, zbx_uint64_t hostid,
zbx_uint64_t itemid, AGENT_RESULT *ar, unsigned char value_type, const zbx_timespec_t *ts);
static void preprocessor_update_history(zbx_preprocessing_manager_t *manager, zbx_uint64_t itemid,
zbx_vector_ptr_t *history);
/* cleanup functions */
static void preproc_item_clear(zbx_preproc_item_t *item)
{
int i;
zbx_free(item->dep_itemids);
for (i = 0; i < item->preproc_ops_num; i++)
{
zbx_free(item->preproc_ops[i].params);
zbx_free(item->preproc_ops[i].error_handler_params);
}
zbx_free(item->preproc_ops);
}
static void request_free_steps(zbx_preprocessing_request_t *request)
{
while (0 < request->steps_num)
{
request->steps_num--;
zbx_free(request->steps[request->steps_num].params);
zbx_free(request->steps[request->steps_num].error_handler_params);
}
zbx_free(request->steps);
}
/******************************************************************************
* *
* Purpose: synchronize preprocessing manager with configuration cache data *
* *
* Parameters: manager - [IN] the manager to be synchronized *
* *
******************************************************************************/
static void preprocessor_sync_configuration(zbx_preprocessing_manager_t *manager)
{
zbx_hashset_iter_t iter;
int ts;
zbx_preproc_history_t *vault;
zbx_preproc_item_t *item;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
ts = manager->cache_ts;
DCconfig_get_preprocessable_items(&manager->item_config, &manager->cache_ts);
if (ts != manager->cache_ts)
{
/* drop items with removed preprocessing steps from preprocessing history cache */
zbx_hashset_iter_reset(&manager->history_cache, &iter);
while (NULL != (vault = (zbx_preproc_history_t *)zbx_hashset_iter_next(&iter)))
{
if (NULL != zbx_hashset_search(&manager->item_config, &vault->itemid))
continue;
zbx_vector_ptr_clear_ext(&vault->history, (zbx_clean_func_t)zbx_preproc_op_history_free);
zbx_vector_ptr_destroy(&vault->history);
zbx_hashset_iter_remove(&iter);
}
/* reset preprocessing history for an item if its preprocessing step was modified */
zbx_hashset_iter_reset(&manager->item_config, &iter);
while (NULL != (item = (zbx_preproc_item_t *)zbx_hashset_iter_next(&iter)))
{
if (ts >= item->update_time)
continue;
if (NULL == (vault = (zbx_preproc_history_t *)zbx_hashset_search(&manager->history_cache,
&item->itemid)))
{
continue;
}
zbx_vector_ptr_clear_ext(&vault->history, (zbx_clean_func_t)zbx_preproc_op_history_free);
zbx_vector_ptr_destroy(&vault->history);
zbx_hashset_remove_direct(&manager->history_cache, vault);
}
}
zabbix_log(LOG_LEVEL_DEBUG, "End of %s() item config size: %d, history cache size: %d", __func__,
manager->item_config.num_data, manager->history_cache.num_data);
}
static void preprocessing_ar_to_variant(AGENT_RESULT *ar, zbx_variant_t *value)
{
if (ISSET_LOG(ar))
zbx_variant_set_str(value,ar->log->value);
else if (ISSET_UI64(ar))
zbx_variant_set_ui64(value, ar->ui64);
else if (ISSET_DBL(ar))
zbx_variant_set_dbl(value, ar->dbl);
else if (ISSET_STR(ar))
zbx_variant_set_str(value, ar->str);
else if (ISSET_TEXT(ar))
zbx_variant_set_str(value, ar->text);
else
THIS_SHOULD_NEVER_HAPPEN;
}
/******************************************************************************
* *
* Purpose: create preprocessing task for request *
* *
* Parameters: manager - [IN] preprocessing manager *
* request - [IN] preprocessing request *
* task - [OUT] preprocessing task data *
* *
******************************************************************************/
static zbx_uint32_t preprocessor_create_task(zbx_preprocessing_manager_t *manager,
zbx_preprocessing_request_t *request, unsigned char **task)
{
zbx_variant_t value;
zbx_preproc_history_t *vault;
zbx_vector_ptr_t *phistory;
if (ITEM_STATE_NOTSUPPORTED == request->value.state)
zbx_variant_set_str(&value, "");
else
preprocessing_ar_to_variant(request->value.result, &value);
if (NULL != (vault = (zbx_preproc_history_t *)zbx_hashset_search(&manager->history_cache,
&request->value.itemid)))
{
phistory = &vault->history;
}
else
phistory = NULL;
return zbx_preprocessor_pack_task(task, request->value.itemid, request->value_type, request->value.ts, &value,
phistory, request->steps, request->steps_num);
}
/******************************************************************************
* *
* Purpose: set request state to done and handle linked items *
* *
* Parameters: manager - [IN] preprocessing manager *
* request - [IN] preprocessing request *
* queue_item - [IN] queued item *
* *
******************************************************************************/
static void preprocessor_set_request_state_done(zbx_preprocessing_manager_t *manager,
zbx_preprocessing_request_base_t *base, const zbx_list_item_t *queue_item)
{
zbx_item_link_t *index, index_local;
zbx_list_iterator_t iterator, next_iterator;
zbx_preprocessing_request_t *request;
zbx_preprocessing_dep_request_t *dep_request;
zbx_preprocessing_request_base_t *prev;
base->state = REQUEST_STATE_DONE;
/* value processed - the pending value can now be processed */
if (NULL != base->pending)
base->pending->state = REQUEST_STATE_QUEUED;
switch (base->kind)
{
case ZBX_PREPROC_ITEM:
request = (zbx_preprocessing_request_t *)base;
index_local.itemid = request->value.itemid;
break;
case ZBX_PREPROC_DEPS:
dep_request = (zbx_preprocessing_dep_request_t *)base;
index_local.itemid = dep_request->master_itemid;
break;
}
index_local.kind = base->kind;
if (NULL != (index = (zbx_item_link_t *)zbx_hashset_search(&manager->linked_items, &index_local)) &&
queue_item == index->queue_item)
{
zbx_hashset_remove_direct(&manager->linked_items, index);
}
if (NULL == manager->queue.head)
return;
zbx_list_iterator_init(&manager->queue, &iterator);
if (iterator.next == queue_item)
return;
while (SUCCEED == zbx_list_iterator_next(&iterator))
{
if (iterator.next == queue_item)
break;
}
prev = (zbx_preprocessing_request_base_t *)iterator.current->data;
zbx_vector_preprocessing_request_base_append(&prev->flush_queue, base);
next_iterator = iterator;
if (SUCCEED == zbx_list_iterator_next(&next_iterator))
{
if (SUCCEED == zbx_list_iterator_equal(&next_iterator, &manager->priority_tail))
manager->priority_tail = iterator;
}
(void)zbx_list_iterator_remove_next(&iterator);
}
/******************************************************************************
* *
* Purpose: create message(s) for dependent item bulk preprocessing *
* *
* Parameters: manager - [IN] preprocessing manager *
* request - [IN] preprocessing request *
* *
* Return value: the number of created messages *
* *
******************************************************************************/
static int preprocessor_create_dep_message(zbx_preprocessing_manager_t *manager,
zbx_preprocessing_dep_request_t *request)
{
int i;
zbx_preproc_dep_t *deps;
zbx_preproc_item_t *master_item;
if (NULL == (master_item = (zbx_preproc_item_t *)zbx_hashset_search(&manager->item_config,
&request->master_itemid)) || 0 == master_item->dep_itemids_num)
{
return 0;
}
deps = (zbx_preproc_dep_t *)zbx_malloc(NULL, (size_t)master_item->dep_itemids_num * sizeof(zbx_preproc_dep_t));
for (i = 0; i < master_item->dep_itemids_num; i++)
{
zbx_preproc_history_t *vault;
zbx_preproc_item_t *item;
deps[i].itemid = master_item->dep_itemids[i].first;
deps[i].flags = (unsigned char)master_item->dep_itemids[i].second;
if (NULL == (item = (zbx_preproc_item_t *)zbx_hashset_search(&manager->item_config,
&master_item->dep_itemids[i].first)))
{
deps[i].value_type = request->value_type;
deps[i].steps = NULL;
deps[i].steps_num = 0;
/* items without preprocessing do not have history */
zbx_vector_ptr_create(&deps[i].history);
continue;
}
deps[i].value_type = item->value_type;
deps[i].steps = item->preproc_ops;
deps[i].steps_num = item->preproc_ops_num;
if (NULL != (vault = (zbx_preproc_history_t *)zbx_hashset_search(&manager->history_cache,
&item->itemid)))
{
deps[i].history = vault->history;
}
else
zbx_vector_ptr_create(&deps[i].history);
}
zbx_preprocessor_pack_dep_request(&request->value, &request->ts, deps, master_item->dep_itemids_num,
&request->messages);
zbx_free(deps);
return request->messages.values_num;
}
/******************************************************************************
* *
* Purpose: returns next dependent item preprocessing message *
* *
* Parameters: request - [IN] the dependent item preprocessing request *
* message - [OUT] the next message to be sent *
* *
* Return value: SUCCEED - the next message was returned *
* FAIL - no more messages to send *
* *
******************************************************************************/
static int preprocessor_dep_request_next_message(zbx_preprocessing_dep_request_t *request,
zbx_ipc_message_t *message)
{
if (0 == request->messages.values_num)
return FAIL;
*message = *request->messages.values[0];
zbx_free(request->messages.values[0]);
zbx_vector_ipcmsg_remove(&request->messages, 0);
return SUCCEED;
}
/******************************************************************************
* *
* Purpose: gets next task to be sent to worker *
* *
* Parameters: manager - [IN] preprocessing manager *
* message - [OUT] the serialized task to be sent *
* *
* Return value: pointer to the task object *
* *
******************************************************************************/
static void *preprocessor_get_next_task(zbx_preprocessing_manager_t *manager, zbx_ipc_message_t *message)
{
zbx_list_iterator_t iterator;
zbx_preprocessing_request_base_t *base;
zbx_preprocessing_request_t *request = NULL;
void *task = NULL;
zbx_preprocessing_direct_request_t *direct_request;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
if (SUCCEED == zbx_list_pop(&manager->direct_queue, (void **)&direct_request))
{
*message = direct_request->message;
zbx_ipc_message_init(&direct_request->message);
task = direct_request;
goto out;
}
zbx_list_iterator_init(&manager->queue, &iterator);
while (SUCCEED == zbx_list_iterator_next(&iterator))
{
int process_notsupported = 0;
zbx_list_iterator_peek(&iterator, (void **)&base);
if (REQUEST_STATE_QUEUED != base->state)
continue;
switch (base->kind)
{
case ZBX_PREPROC_DEPS:
if (0 == preprocessor_create_dep_message(manager,
(zbx_preprocessing_dep_request_t *)base))
{
base->state = REQUEST_STATE_DONE;
continue;
}
(void)preprocessor_dep_request_next_message((zbx_preprocessing_dep_request_t *)base,
message);
break;
case ZBX_PREPROC_ITEM:
request = (zbx_preprocessing_request_t *)base;
if (NULL != request->steps &&
ZBX_PREPROC_VALIDATE_NOT_SUPPORTED == request->steps[0].type)
{
process_notsupported = 1;
}
if (ITEM_STATE_NOTSUPPORTED == request->value.state && 0 == process_notsupported)
{
zbx_preproc_history_t *vault;
if (NULL != (vault = (zbx_preproc_history_t *) zbx_hashset_search(
&manager->history_cache, &request->value.itemid)))
{
zbx_vector_ptr_clear_ext(&vault->history,
(zbx_clean_func_t) zbx_preproc_op_history_free);
zbx_vector_ptr_destroy(&vault->history);
zbx_hashset_remove_direct(&manager->history_cache, vault);
}
preprocessor_set_request_state_done(manager, base, iterator.current);
continue;
}
message->code = ZBX_IPC_PREPROCESSOR_REQUEST;
message->size = preprocessor_create_task(manager, request, &message->data);
request_free_steps(request);
break;
}
task = iterator.current;
base->state = REQUEST_STATE_PROCESSING;
break;
}
out:
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
return task;
}
/******************************************************************************
* *
* Purpose: get worker data by IPC client *
* *
* Parameters: manager - [IN] preprocessing manager *
* client - [IN] IPC client *
* *
* Return value: pointer to the worker data *
* *
******************************************************************************/
static zbx_preprocessing_worker_t *preprocessor_get_worker_by_client(zbx_preprocessing_manager_t *manager,
zbx_ipc_client_t *client)
{
int i;
zbx_preprocessing_worker_t *worker = NULL;
for (i = 0; i < manager->worker_count; i++)
{
if (client == manager->workers[i].client)
{
worker = &manager->workers[i];
break;
}
}
if (NULL == worker)
{
THIS_SHOULD_NEVER_HAPPEN;
exit(EXIT_FAILURE);
}
return worker;
}
/******************************************************************************
* *
* Purpose: get worker without active preprocessing task *
* *
* Parameters: manager - [IN] preprocessing manager *
* *
* Return value: pointer to the worker data or NULL if none *
* *
******************************************************************************/
static zbx_preprocessing_worker_t *preprocessor_get_free_worker(zbx_preprocessing_manager_t *manager)
{
int i;
for (i = 0; i < manager->worker_count; i++)
{
if (NULL == manager->workers[i].task)
return &manager->workers[i];
}
return NULL;
}
/******************************************************************************
* *
* Purpose: assign available queued preprocessing tasks to free workers *
* *
* Parameters: manager - [IN] preprocessing manager *
* *
******************************************************************************/
static void preprocessor_assign_tasks(zbx_preprocessing_manager_t *manager)
{
zbx_preprocessing_worker_t *worker;
void *data;
zbx_ipc_message_t message;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
while (NULL != (worker = preprocessor_get_free_worker(manager)) &&
NULL != (data = preprocessor_get_next_task(manager, &message)))
{
if (FAIL == zbx_ipc_client_send(worker->client, message.code, message.data, message.size))
{
zabbix_log(LOG_LEVEL_CRIT, "cannot send data to preprocessing worker");
exit(EXIT_FAILURE);
}
worker->task = data;
zbx_ipc_message_clean(&message);
}
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
/******************************************************************************
* *
* Purpose: frees resources allocated by preprocessor item value *
* *
* Parameters: value - [IN] value to be freed *
* *
******************************************************************************/
static void preproc_item_value_clear(zbx_preproc_item_value_t *value)
{
zbx_free(value->error);
zbx_free(value->ts);
if (NULL != value->result)
{
free_result(value->result);
zbx_free(value->result);
}
}
/******************************************************************************
* *
* Purpose: free preprocessing request *
* *
* Parameters: base - [IN] request data to be freed *
* *
* Comments: This handles freeing normal and dependent item requests *
* *
******************************************************************************/
static void preprocessor_free_request(zbx_preprocessing_request_base_t *base)
{
zbx_preprocessing_request_t *request;
zbx_preprocessing_dep_request_t *dep_request;
zbx_vector_preprocessing_request_base_clear_ext(&base->flush_queue, preprocessor_free_request);
zbx_vector_preprocessing_request_base_destroy(&base->flush_queue);
switch (base->kind)
{
case ZBX_PREPROC_ITEM:
request = (zbx_preprocessing_request_t *)base;
preproc_item_value_clear(&request->value);
request_free_steps(request);
break;
case ZBX_PREPROC_DEPS:
dep_request = (zbx_preprocessing_dep_request_t *)base;
zbx_preprocessor_free_dep_results(dep_request->results, dep_request->results_offset);
zbx_variant_clear(&dep_request->value);
zbx_vector_ipcmsg_clear_ext(&dep_request->messages, zbx_ipc_message_free);
zbx_vector_ipcmsg_destroy(&dep_request->messages);
break;
}
zbx_free(base);
}
/******************************************************************************
* *
* Purpose: free preprocessing direct request *
* *
* Parameters: direct_request - [IN] forward data to be freed *
* *
******************************************************************************/
static void preprocessor_free_direct_request(zbx_preprocessing_direct_request_t *direct_request)
{
zbx_ipc_client_release(direct_request->client);
zbx_ipc_message_clean(&direct_request->message);
zbx_free(direct_request);
}
/******************************************************************************
* *
* Purpose: add new value to the local history cache or send to LLD manager *
* *
* Parameters: value - [IN] value to be added or sent *
* *
******************************************************************************/
static void preprocessor_flush_value(const zbx_preproc_item_value_t *value)
{
if (0 == (value->item_flags & ZBX_FLAG_DISCOVERY_RULE) || 0 == (program_type & ZBX_PROGRAM_TYPE_SERVER))
{
dc_add_history(value->itemid, value->item_value_type, value->item_flags, value->result,
value->ts, value->state, value->error);
}
else
{
zbx_lld_process_agent_result(value->itemid, value->hostid, value->result, value->ts,
value->error);
}
}
static void preprocessor_flush_dep_results(zbx_preprocessing_manager_t *manager,
zbx_preprocessing_dep_request_t *request)
{
int i;
for (i = 0; i < request->results_alloc; i++)
{
unsigned char state;
state = (NULL == request->results[i].error ? ITEM_STATE_NORMAL : ITEM_STATE_NOTSUPPORTED);
if (0 == (request->results[i].flags & ZBX_FLAG_DISCOVERY_RULE) ||
0 == (program_type & ZBX_PROGRAM_TYPE_SERVER))
{
dc_add_history(request->results[i].itemid, request->results[i].value_type,
request->results[i].flags, &request->results[i].value, &request->ts, state,
request->results[i].error);
}
else
{
zbx_lld_process_agent_result(request->results[i].itemid, request->hostid,
&request->results[i].value, &request->ts, request->results[i].error);
}
}
manager->processed_num += (zbx_uint64_t)request->results_alloc;
manager->preproc_num--;
}
/******************************************************************************
* *
* Purpose: recursively flush processed request and the other processed *
* requests that were waiting on this request to be finished *
* *
* Parameters: manager - [IN] preprocessing manager *
* base - [IN] the preprocessing request *
* *
******************************************************************************/
static void preprocessing_flush_request(zbx_preprocessing_manager_t *manager,
zbx_preprocessing_request_base_t *base)
{
zbx_preprocessing_request_t *request;
zbx_preprocessing_dep_request_t *dep_request;
int i;
switch (base->kind)
{
case ZBX_PREPROC_ITEM:
request = (zbx_preprocessing_request_t *)base;
preprocessor_flush_value(&request->value);
manager->processed_num++;
manager->queued_num--;
break;
case ZBX_PREPROC_DEPS:
dep_request = (zbx_preprocessing_dep_request_t *)base;
preprocessor_flush_dep_results(manager, dep_request);
break;
}
for (i = 0; i < base->flush_queue.values_num; i++)
preprocessing_flush_request(manager, base->flush_queue.values[i]);
}
/******************************************************************************
* *
* Purpose: add all sequential processed values from beginning of the queue *
* to the local history cache *
* *
* Parameters: manager - [IN] preprocessing manager *
* *
******************************************************************************/
static void preprocessing_flush_queue(zbx_preprocessing_manager_t *manager)
{
zbx_preprocessing_request_base_t *base;
zbx_list_iterator_t iterator;
zbx_list_iterator_init(&manager->queue, &iterator);
while (SUCCEED == zbx_list_iterator_next(&iterator))
{
zbx_list_iterator_peek(&iterator, (void **)&base);
if (REQUEST_STATE_DONE != base->state)
break;
preprocessing_flush_request(manager, base);
if (SUCCEED == zbx_list_iterator_equal(&iterator, &manager->priority_tail))
zbx_list_iterator_clear(&manager->priority_tail);
zbx_list_pop(&manager->queue, NULL);
preprocessor_free_request(base);
}
}
static void preproc_link_nodes(zbx_preprocessing_manager_t *manager, zbx_uint64_t itemid,
zbx_preprocessing_kind_t kind, zbx_list_item_t *enqueued_at)
{
zbx_item_link_t *index, index_local;
zbx_preprocessing_request_base_t *request, *linked_request;
index_local.itemid = itemid;
index_local.kind = kind;
/* existing linked item*/
if (NULL != (index = (zbx_item_link_t *)zbx_hashset_search(&manager->linked_items, &index_local)))
{
linked_request = (zbx_preprocessing_request_base_t *)(enqueued_at->data);
request = (zbx_preprocessing_request_base_t *)(index->queue_item->data);
if (REQUEST_STATE_DONE != request->state)
{
request->pending = linked_request;
linked_request->state = REQUEST_STATE_PENDING;
}
index->queue_item = enqueued_at;
}
else
{
index_local.queue_item = enqueued_at;
zbx_hashset_insert(&manager->linked_items, &index_local, sizeof(zbx_item_link_t));
}
}
/******************************************************************************
* *
* Purpose: create relation between item values within value queue *
* *
* Parameters: manager - [IN] preprocessing manager *
* enqueued_at - [IN] position in value queue *
* item - [IN] item configuration data *
* *
******************************************************************************/
static void preprocessor_link_items(zbx_preprocessing_manager_t *manager, zbx_list_item_t *enqueued_at,
zbx_preproc_item_t *item)
{
int i;
zbx_preproc_op_t *op;
/* allow out of order processing for items without dependent items */
/* or preprocessing steps requiring serial processing */
if (0 == item->dep_itemids_num)
{
for (i = 0; i < item->preproc_ops_num; i++)
{
op = &item->preproc_ops[i];
if (ZBX_PREPROC_DELTA_VALUE == op->type || ZBX_PREPROC_DELTA_SPEED == op->type)
break;
if (ZBX_PREPROC_THROTTLE_VALUE == op->type || ZBX_PREPROC_THROTTLE_TIMED_VALUE == op->type)
break;
}
if (i == item->preproc_ops_num)
return;
}
preproc_link_nodes(manager, item->itemid, ZBX_PREPROC_ITEM, enqueued_at);
}
/******************************************************************************
* *
* Purpose: enqueue dependent items (if any) by preproc value *
* *
* Parameters: manager - [IN] preprocessing manager *
* value - [IN] the item preproc value *
* *
******************************************************************************/
static void preprocessor_enqueue_dependent_value(zbx_preprocessing_manager_t *manager,
zbx_preproc_item_value_t *value)
{
if (NULL == value->result)
return;
preprocessor_enqueue_dependent(manager, value->hostid, value->itemid, value->result,
value->item_value_type, value->ts);
}
/******************************************************************************
* *
* Purpose: enqueue preprocessing request *
* *
* Parameters: manage - [IN] preprocessing manager *
* value - [IN] item value *
* *
******************************************************************************/
static void preprocessor_enqueue(zbx_preprocessing_manager_t *manager, zbx_preproc_item_value_t *value)
{
zbx_preprocessing_request_t *request;
zbx_preproc_item_t *item, item_local;
zbx_list_item_t *enqueued_at;
int i;
zbx_preprocessing_states_t state;
unsigned char priority = ZBX_PREPROC_PRIORITY_NONE;
int notsupp_shift;
zabbix_log(LOG_LEVEL_DEBUG, "In %s() itemid: " ZBX_FS_UI64, __func__, value->itemid);
item_local.itemid = value->itemid;
item = (zbx_preproc_item_t *)zbx_hashset_search(&manager->item_config, &item_local);
/* override priority based on item type */
if (NULL != item && ITEM_TYPE_INTERNAL == item->type)
priority = ZBX_PREPROC_PRIORITY_FIRST;
if (NULL == item || 0 == item->preproc_ops_num || (ITEM_STATE_NOTSUPPORTED != value->state &&
(NULL == value->result || 0 == ISSET_VALUE(value->result))))
{
state = REQUEST_STATE_DONE;
if (NULL == manager->queue.head)
{
/* queue is empty and item is done, it can be flushed */
preprocessor_flush_value(value);
manager->processed_num++;
preprocessor_enqueue_dependent_value(manager, value);
preproc_item_value_clear(value);
goto out;
}
}
else
state = REQUEST_STATE_QUEUED;
request = (zbx_preprocessing_request_t *)zbx_malloc(NULL, sizeof(zbx_preprocessing_request_t));
memset(request, 0, sizeof(zbx_preprocessing_request_t));
request->base.kind = ZBX_PREPROC_ITEM;
zbx_vector_preprocessing_request_base_create(&request->base.flush_queue);
memcpy(&request->value, value, sizeof(zbx_preproc_item_value_t));
request->base.state = state;
if (REQUEST_STATE_QUEUED == state)
{
notsupp_shift = ITEM_STATE_NOTSUPPORTED == value->state ? -1 : 0;
for (i = 0; i < item->preproc_ops_num; i++)
{
if (ZBX_PREPROC_VALIDATE_NOT_SUPPORTED == item->preproc_ops[i].type)
{
notsupp_shift = ITEM_STATE_NOTSUPPORTED != value->state;
if (0 != i)
THIS_SHOULD_NEVER_HAPPEN;
break;
}
}
}
if (REQUEST_STATE_QUEUED == state && 0 <= notsupp_shift)
{
request->value_type = item->value_type;
if (0 < item->preproc_ops_num - notsupp_shift)
{
request->steps = (zbx_preproc_op_t *)zbx_malloc(NULL, sizeof(zbx_preproc_op_t) *
(size_t)(item->preproc_ops_num - notsupp_shift));
request->steps_num = item->preproc_ops_num - notsupp_shift;
for (i = 0; i < item->preproc_ops_num - notsupp_shift; i++)
{
request->steps[i].type = item->preproc_ops[i + notsupp_shift].type;
request->steps[i].params = zbx_strdup(NULL, item->preproc_ops[i + notsupp_shift].params);
request->steps[i].error_handler = item->preproc_ops[i + notsupp_shift].error_handler;
request->steps[i].error_handler_params = zbx_strdup(NULL,
item->preproc_ops[i + notsupp_shift].error_handler_params);
}
}
else
request->base.state = REQUEST_STATE_DONE;
manager->preproc_num++;
}
/* priority items are enqueued at the beginning of the line */
if (ZBX_PREPROC_PRIORITY_FIRST == priority)
{
if (SUCCEED == zbx_list_iterator_isset(&manager->priority_tail))
{
/* insert after the last internal item */
zbx_list_insert_after(&manager->queue, manager->priority_tail.current, request, &enqueued_at);
zbx_list_iterator_update(&manager->priority_tail);
}
else
{
/* no internal items in queue, insert at the beginning */
zbx_list_prepend(&manager->queue, request, &enqueued_at);
zbx_list_iterator_init(&manager->queue, &manager->priority_tail);
}
zbx_list_iterator_next(&manager->priority_tail);
}
else
{
zbx_list_insert_after(&manager->queue, NULL, request, &enqueued_at);
zbx_list_iterator_update(&manager->priority_tail);
}
if (REQUEST_STATE_QUEUED == request->base.state)
preprocessor_link_items(manager, enqueued_at, item);
/* if no preprocessing is needed, dependent items are enqueued */
if (REQUEST_STATE_DONE == request->base.state)
preprocessor_enqueue_dependent_value(manager, value);
manager->queued_num++;
out:
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
/******************************************************************************
* *
* Purpose: enqueue dependent items (if any) *
* *
* Parameters: manager - [IN] preprocessing manager *
* source_value - [IN] master item value *
* master - [IN] dependent item should be enqueued after *
* this item *
* *
******************************************************************************/
static void preprocessor_enqueue_dependent(zbx_preprocessing_manager_t *manager, zbx_uint64_t hostid,
zbx_uint64_t itemid, AGENT_RESULT *ar, unsigned char value_type, const zbx_timespec_t *ts)
{
zbx_preproc_item_t *item, item_local;
zabbix_log(LOG_LEVEL_DEBUG, "In %s() itemid: " ZBX_FS_UI64, __func__, itemid);
if (ISSET_VALUE(ar))
{
item_local.itemid = itemid;
if (NULL != (item = (zbx_preproc_item_t *)zbx_hashset_search(&manager->item_config, &item_local)) &&
0 != item->dep_itemids_num)
{
zbx_preprocessing_dep_request_t *dep_request;
zbx_variant_t value;
zbx_list_item_t *enqueued_at;
dep_request = zbx_malloc(NULL, sizeof(zbx_preprocessing_dep_request_t));
dep_request->base.kind = ZBX_PREPROC_DEPS;
dep_request->base.state = REQUEST_STATE_QUEUED;
dep_request->base.pending = NULL;
zbx_vector_preprocessing_request_base_create(&dep_request->base.flush_queue);
dep_request->hostid = hostid;
dep_request->ts = NULL != ts ? *ts : (zbx_timespec_t){0, 0};
/* the data is copied without allocation - the variant value must not be cleared afterwards */
preprocessing_ar_to_variant(ar, &value);
zbx_variant_copy(&dep_request->value, &value);
dep_request->value_type = value_type;
dep_request->master_itemid = itemid;
zbx_vector_ipcmsg_create(&dep_request->messages);
dep_request->results = NULL;
dep_request->results_alloc = 0;
dep_request->results_offset = 0;
zbx_list_append(&manager->queue, dep_request, &enqueued_at);
preproc_link_nodes(manager, itemid, ZBX_PREPROC_DEPS, enqueued_at);
preprocessor_assign_tasks(manager);
preprocessing_flush_queue(manager);
manager->preproc_num++;
}
}
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
/******************************************************************************
* *
* Purpose: handle new preprocessing request *
* *
* Parameters: manager - [IN] preprocessing manager *
* message - [IN] packed preprocessing request *
* *
******************************************************************************/
static void preprocessor_add_request(zbx_preprocessing_manager_t *manager, zbx_ipc_message_t *message)
{
zbx_uint32_t offset = 0;
zbx_preproc_item_value_t value;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
preprocessor_sync_configuration(manager);
while (offset < message->size)
{
offset += zbx_preprocessor_unpack_value(&value, message->data + offset);
preprocessor_enqueue(manager, &value);
}
preprocessor_assign_tasks(manager);
preprocessing_flush_queue(manager);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
/******************************************************************************
* *
* Purpose: handle new preprocessing test request *
* *
* Parameters: manager - [IN] preprocessing manager *
* message - [IN] packed preprocessing request *
* *
******************************************************************************/
static void preprocessor_add_test_request(zbx_preprocessing_manager_t *manager, zbx_ipc_client_t *client,
zbx_ipc_message_t *message)
{
zbx_preprocessing_direct_request_t *direct_request;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
zbx_ipc_client_addref(client);
direct_request = zbx_malloc(NULL, sizeof(zbx_preprocessing_direct_request_t));
direct_request->client = client;
zbx_ipc_message_copy(&direct_request->message, message);
zbx_list_append(&manager->direct_queue, direct_request, NULL);
preprocessor_assign_tasks(manager);
preprocessing_flush_queue(manager);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
/******************************************************************************
* *
* Purpose: get result data from variant and error message *
* *
* Parameters: request - [IN/OUT] preprocessing request *
* value - [IN] variant value *
* error - [IN] error message (if any) *
* *
******************************************************************************/
static int preprocessor_set_variant_result(zbx_preprocessing_request_t *request,
zbx_variant_t *value, char *error)
{
int type, ret = FAIL;
zbx_log_t *log;
if (NULL != error)
{
/* on error item state is set to ITEM_STATE_NOTSUPPORTED */
request->value.state = ITEM_STATE_NOTSUPPORTED;
zbx_free(request->value.error);
request->value.error = error;
ret = FAIL;
goto out;
}
if (ZBX_VARIANT_NONE == value->type)
{
if (NULL != request->value.result)
free_result(request->value.result);
zbx_free(request->value.error);
request->value.state = ITEM_STATE_NORMAL;
ret = FAIL;
goto out;
}
switch (request->value_type)
{
case ITEM_VALUE_TYPE_FLOAT:
type = ZBX_VARIANT_DBL;
break;
case ITEM_VALUE_TYPE_UINT64:
type = ZBX_VARIANT_UI64;
break;
default:
/* ITEM_VALUE_TYPE_STR, ITEM_VALUE_TYPE_TEXT, ITEM_VALUE_TYPE_LOG */
type = ZBX_VARIANT_STR;
}
if (FAIL != (ret = zbx_variant_convert(value, type)))
{
/* old result is shared between dependent and master items, it cannot be modified, create new result */
if (NULL == request->value.result)
{
request->value.result = (AGENT_RESULT *)zbx_malloc(NULL, sizeof(AGENT_RESULT));
init_result(request->value.result);
}
else
{
/* preserve eventlog related information */
if (ITEM_VALUE_TYPE_LOG != request->value_type)
free_result(request->value.result);
}
if (ITEM_STATE_NOTSUPPORTED == request->value.state)
request->value.state = ITEM_STATE_NORMAL;
switch (request->value_type)
{
case ITEM_VALUE_TYPE_FLOAT:
SET_DBL_RESULT(request->value.result, value->data.dbl);
break;
case ITEM_VALUE_TYPE_STR:
SET_STR_RESULT(request->value.result, value->data.str);
break;
case ITEM_VALUE_TYPE_LOG:
if (ISSET_LOG(request->value.result))
{
log = GET_LOG_RESULT(request->value.result);
zbx_free(log->value);
}
else
{
log = zbx_malloc(NULL, sizeof(zbx_log_t));
memset(log, 0, sizeof(zbx_log_t));
SET_LOG_RESULT(request->value.result, log);
}
log->value = value->data.str;
break;
case ITEM_VALUE_TYPE_UINT64:
SET_UI64_RESULT(request->value.result, value->data.ui64);
break;
case ITEM_VALUE_TYPE_TEXT:
SET_TEXT_RESULT(request->value.result, value->data.str);
break;
}
zbx_variant_set_none(value);
}
else
{
zbx_free(request->value.error);
request->value.error = zbx_dsprintf(NULL, "Value \"%s\" of type \"%s\" is not suitable for"
" value type \"%s\"", zbx_variant_value_desc(value), zbx_variant_type_desc(value),
zbx_item_value_type_string((zbx_item_value_type_t)request->value_type));
request->value.state = ITEM_STATE_NOTSUPPORTED;
ret = FAIL;
}
out:
return ret;
}
/******************************************************************************
* *
* Purpose: handle preprocessing result *
* *
* Parameters: manager - [IN] preprocessing manager *
* client - [IN] IPC client *
* message - [IN] packed preprocessing result *
* *
******************************************************************************/
static void preprocessor_add_result(zbx_preprocessing_manager_t *manager, zbx_ipc_client_t *client,
zbx_ipc_message_t *message)
{
zbx_preprocessing_worker_t *worker;
zbx_preprocessing_request_t *request;
zbx_variant_t value;
char *error;
zbx_vector_ptr_t history;
zbx_preproc_history_t *vault;
zbx_list_item_t *node;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
worker = preprocessor_get_worker_by_client(manager, client);
node = (zbx_list_item_t *)worker->task;
request = (zbx_preprocessing_request_t *)node->data;
zbx_vector_ptr_create(&history);
zbx_preprocessor_unpack_result(&value, &history, &error, message->data);
if (NULL != (vault = (zbx_preproc_history_t *)zbx_hashset_search(&manager->history_cache,
&request->value.itemid)))
{
zbx_vector_ptr_clear_ext(&vault->history, (zbx_clean_func_t)zbx_preproc_op_history_free);
}
if (0 != history.values_num)
{
if (NULL == vault)
{
zbx_preproc_history_t history_local;
history_local.itemid = request->value.itemid;
vault = (zbx_preproc_history_t *)zbx_hashset_insert(&manager->history_cache, &history_local,
sizeof(history_local));
zbx_vector_ptr_create(&vault->history);
}
zbx_vector_ptr_append_array(&vault->history, history.values, history.values_num);
zbx_vector_ptr_clear(&history);
}
else
{
if (NULL != vault)
{
zbx_vector_ptr_destroy(&vault->history);
zbx_hashset_remove_direct(&manager->history_cache, vault);
}
}
preprocessor_set_request_state_done(manager, (zbx_preprocessing_request_base_t *)request, worker->task);
if (FAIL != preprocessor_set_variant_result(request, &value, error))
preprocessor_enqueue_dependent_value(manager, &request->value);
worker->task = NULL;
zbx_variant_clear(&value);
manager->preproc_num--;
preprocessor_assign_tasks(manager);
preprocessing_flush_queue(manager);
zbx_vector_ptr_destroy(&history);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
/******************************************************************************
* *
* Purpose: handle preprocessing result *
* *
* Parameters: manager - [IN] preprocessing manager *
* itemid - [IN] the item identifier *
* history - [IN] the new preprocessing history *
* *
******************************************************************************/
static void preprocessor_update_history(zbx_preprocessing_manager_t *manager, zbx_uint64_t itemid,
zbx_vector_ptr_t *history)
{
zbx_preproc_history_t *vault;
if (NULL != (vault = (zbx_preproc_history_t *)zbx_hashset_search(&manager->history_cache,
&itemid)))
{
zbx_vector_ptr_clear_ext(&vault->history, (zbx_clean_func_t)zbx_preproc_op_history_free);
}
if (0 != history->values_num)
{
if (NULL == vault)
{
zbx_preproc_history_t history_local;
history_local.itemid = itemid;
vault = (zbx_preproc_history_t *)zbx_hashset_insert(&manager->history_cache, &history_local,
sizeof(history_local));
zbx_vector_ptr_create(&vault->history);
}
zbx_vector_ptr_append_array(&vault->history, history->values, history->values_num);
zbx_vector_ptr_clear(history);
}
else
{
if (NULL != vault)
{
zbx_vector_ptr_destroy(&vault->history);
zbx_hashset_remove_direct(&manager->history_cache, vault);
}
}
}
static void preprocessor_finalize_dep_results(zbx_preprocessing_manager_t *manager,
zbx_preprocessing_dep_request_t *request, zbx_preprocessing_worker_t *worker)
{
int i;
if (request->results_alloc != request->results_offset)
return;
for (i = 0; i < request->results_alloc; i++)
{
if (NULL == request->results[i].error)
{
preprocessor_update_history(manager, request->results[i].itemid, &request->results[i].history);
preprocessor_enqueue_dependent(manager, request->hostid, request->results[i].itemid,
&request->results[i].value, request->results[i].value_type, &request->ts);
}
}
preprocessor_set_request_state_done(manager, (zbx_preprocessing_request_base_t *)request,
(zbx_list_item_t *)worker->task);
worker->task = NULL;
preprocessor_assign_tasks(manager);
preprocessing_flush_queue(manager);
}
/******************************************************************************
* *
* Purpose: handle dependent item batch preprocessing result *
* *
* Parameters: manager - [IN] preprocessing manager *
* client - [IN] IPC client *
* message - [IN] packed preprocessing result *
* *
******************************************************************************/
static void preprocessor_process_dep_result(zbx_preprocessing_manager_t *manager, zbx_ipc_client_t *client,
zbx_ipc_message_t *message)
{
zbx_preprocessing_worker_t *worker;
zbx_preprocessing_dep_request_t *request;
zbx_list_item_t *node;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
worker = preprocessor_get_worker_by_client(manager, client);
node = (zbx_list_item_t *)worker->task;
request = (zbx_preprocessing_dep_request_t *)node->data;
zbx_preprocessor_unpack_dep_result(&request->results_alloc, &request->results_offset, &request->results,
message->data);
preprocessor_finalize_dep_results(manager, request, worker);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
/******************************************************************************
* *
* Purpose: handle next dependent item batch preprocessing result *
* *
* Parameters: manager - [IN] preprocessing manager *
* client - [IN] IPC client *
* message - [IN] packed preprocessing result *
* *
******************************************************************************/
static void preprocessor_process_dep_result_cont(zbx_preprocessing_manager_t *manager, zbx_ipc_client_t *client,
zbx_ipc_message_t *message)
{
zbx_preprocessing_worker_t *worker;
zbx_preprocessing_dep_request_t *request;
zbx_list_item_t *node;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
worker = preprocessor_get_worker_by_client(manager, client);
node = (zbx_list_item_t *)worker->task;
request = (zbx_preprocessing_dep_request_t *)node->data;
zbx_preprocessor_unpack_dep_result_cont(&request->results_offset, request->results + request->results_offset,
message->data);
preprocessor_finalize_dep_results(manager, request, worker);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
/******************************************************************************
* *
* Purpose: handle dependent item batch preprocessing result *
* *
* Parameters: manager - [IN] preprocessing manager *
* client - [IN] IPC client *
* message - [IN] packed preprocessing result *
* *
******************************************************************************/
static void preprocessor_next_dep_request(zbx_preprocessing_manager_t *manager, zbx_ipc_client_t *client)
{
zbx_preprocessing_worker_t *worker;
zbx_preprocessing_dep_request_t *request;
zbx_ipc_message_t message;
zbx_list_item_t *node;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
worker = preprocessor_get_worker_by_client(manager, client);
node = (zbx_list_item_t *)worker->task;
request = (zbx_preprocessing_dep_request_t *)node->data;
if (SUCCEED == preprocessor_dep_request_next_message(request, &message))
{
zbx_ipc_client_send(client, message.code, message.data, message.size);
zbx_ipc_message_clean(&message);
}
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
/******************************************************************************
* *
* Purpose: handle preprocessing result *
* *
* Parameters: manager - [IN] preprocessing manager *
* client - [IN] IPC client *
* message - [IN] packed preprocessing result *
* *
* Comments: Preprocessing testing results are directly forwarded to source *
* client as they are. *
* *
******************************************************************************/
static void preprocessor_flush_test_result(zbx_preprocessing_manager_t *manager, zbx_ipc_client_t *client,
zbx_ipc_message_t *message)
{
zbx_preprocessing_worker_t *worker;
zbx_preprocessing_direct_request_t *direct_request;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
worker = preprocessor_get_worker_by_client(manager, client);
direct_request = (zbx_preprocessing_direct_request_t *)worker->task;
/* forward the response to the client */
if (SUCCEED == zbx_ipc_client_connected(direct_request->client))
zbx_ipc_client_send(direct_request->client, message->code, message->data, message->size);
worker->task = NULL;
preprocessor_free_direct_request(direct_request);
preprocessor_assign_tasks(manager);
preprocessing_flush_queue(manager);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
static void preprocessor_add_item_stats(zbx_uint64_t itemid, zbx_preprocessing_states_t state, zbx_hashset_t *items,
int *total, int *queued, int *processing, int *done, int *pending)
{
#define ZBX_MAX_REQUEST_STATE_PRINT_LIMIT 25
zbx_preproc_item_stats_t *item;
if (NULL == (item = zbx_hashset_search(items, &itemid)))
{
zbx_preproc_item_stats_t item_local = {.itemid = itemid};
item = zbx_hashset_insert(items, &item_local, sizeof(item_local));
}
switch(state)
{
case REQUEST_STATE_QUEUED:
if (*queued < ZBX_MAX_REQUEST_STATE_PRINT_LIMIT)
{
zabbix_log(LOG_LEVEL_DEBUG, "oldest queued itemid: " ZBX_FS_UI64
" values:%d pos:%d", item->itemid, item->values_num, *total);
}
(*queued)++;
break;
case REQUEST_STATE_PROCESSING:
if (*processing < ZBX_MAX_REQUEST_STATE_PRINT_LIMIT)
{
zabbix_log(LOG_LEVEL_DEBUG, "oldest processing itemid: " ZBX_FS_UI64
" values:%d pos:%d", item->itemid, item->values_num, *total);
}
(*processing)++;
break;
case REQUEST_STATE_DONE:
if (*done < ZBX_MAX_REQUEST_STATE_PRINT_LIMIT)
{
zabbix_log(LOG_LEVEL_DEBUG, "oldest done itemid: " ZBX_FS_UI64
" values:%d pos:%d", item->itemid, item->values_num, *total);
}
(*done)++;
break;
case REQUEST_STATE_PENDING:
if (*pending < ZBX_MAX_REQUEST_STATE_PRINT_LIMIT)
{
zabbix_log(LOG_LEVEL_DEBUG, "oldest pending itemid: " ZBX_FS_UI64
" values:%d pos:%d", item->itemid, item->values_num, *total);
}
(*pending)++;
break;
}
item->values_num++;
(*total)++;
#undef ZBX_MAX_REQUEST_STATE_PRINT_LIMIT
}
static void preprocessor_get_items_totals(zbx_preprocessing_manager_t *manager, int *total, int *queued,
int *processing, int *done, int *pending)
{
zbx_list_iterator_t iterator;
zbx_hashset_t items;
zbx_preprocessing_request_base_t *base;
zbx_preprocessing_request_t *request;
zbx_preprocessing_dep_request_t *dep_request;
zbx_preproc_item_t *master_item;
*total = 0;
*queued = 0;
*processing = 0;
*done = 0;
*pending = 0;
zbx_hashset_create(&items, 1024, ZBX_DEFAULT_UINT64_HASH_FUNC, ZBX_DEFAULT_UINT64_COMPARE_FUNC);
zbx_list_iterator_init(&manager->queue, &iterator);
while (SUCCEED == zbx_list_iterator_next(&iterator))
{
zbx_list_iterator_peek(&iterator, (void **)&base);
switch (base->kind)
{
case ZBX_PREPROC_ITEM:
request = (zbx_preprocessing_request_t *)base;
preprocessor_add_item_stats(request->value.itemid, base->state, &items, total, queued,
processing, done, pending);
break;
case ZBX_PREPROC_DEPS:
dep_request = (zbx_preprocessing_dep_request_t *)base;
if (NULL != (master_item = (zbx_preproc_item_t *)zbx_hashset_search(
&manager->item_config, &dep_request->master_itemid)))
{
int i;
for (i = 0; i < master_item->dep_itemids_num; i++)
{
preprocessor_add_item_stats(master_item->dep_itemids[i].first,
base->state, &items, total, queued, processing, done,
pending);
}
}
break;
}
}
zbx_hashset_destroy(&items);
#undef ZBX_MAX_REQUEST_STATE_PRINT_LIMIT
}
/******************************************************************************
* *
* Purpose: return diagnostic statistics *
* *
* Parameters: manager - [IN] preprocessing manager *
* client - [IN] IPC client *
* *
******************************************************************************/
static void preprocessor_get_diag_stats(zbx_preprocessing_manager_t *manager, zbx_ipc_client_t *client)
{
unsigned char *data;
zbx_uint32_t data_len;
int total, queued, processing, done, pending;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
preprocessor_get_items_totals(manager, &total, &queued, &processing, &done, &pending);
data_len = zbx_preprocessor_pack_diag_stats(&data, total, queued, processing, done, pending);
zbx_ipc_client_send(client, ZBX_IPC_PREPROCESSOR_DIAG_STATS_RESULT, data, data_len);
zbx_free(data);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
/******************************************************************************
* *
* Purpose: compare item statistics by value *
* *
******************************************************************************/
static int preproc_sort_item_by_values_desc(const void *d1, const void *d2)
{
const zbx_preproc_item_stats_t *i1 = *(const zbx_preproc_item_stats_t * const *)d1;
const zbx_preproc_item_stats_t *i2 = *(const zbx_preproc_item_stats_t * const *)d2;
return i2->values_num - i1->values_num;
}
static void preprocessor_add_item_view(zbx_preprocessing_manager_t *manager, zbx_uint64_t itemid,
zbx_hashset_t *items, zbx_vector_ptr_t *view)
{
zbx_preproc_item_stats_t *item;
if (NULL == (item = zbx_hashset_search(items, &itemid)))
{
zbx_preproc_item_stats_t item_local = {.itemid = itemid};
zbx_preproc_item_t *child;
item = zbx_hashset_insert(items, &item_local, sizeof(item_local));
if (NULL != (child = (zbx_preproc_item_t *)zbx_hashset_search(&manager->item_config, &itemid)))
item->steps_num = child->preproc_ops_num;
zbx_vector_ptr_append(view, item);
}
item->values_num++;
}
static void preprocessor_get_items_view(zbx_preprocessing_manager_t *manager, zbx_hashset_t *items,
zbx_vector_ptr_t *view)
{
zbx_list_iterator_t iterator;
zbx_preprocessing_request_base_t *base;
zbx_preprocessing_request_t *request;
zbx_preprocessing_dep_request_t *dep_request;
zbx_preproc_item_t *master_item;
zbx_list_iterator_init(&manager->queue, &iterator);
while (SUCCEED == zbx_list_iterator_next(&iterator))
{
zbx_list_iterator_peek(&iterator, (void **)&base);
switch (base->kind)
{
case ZBX_PREPROC_ITEM:
request = (zbx_preprocessing_request_t *)base;
preprocessor_add_item_view(manager, request->value.itemid, items, view);
break;
case ZBX_PREPROC_DEPS:
dep_request = (zbx_preprocessing_dep_request_t *)base;
if (NULL != (master_item = (zbx_preproc_item_t *)zbx_hashset_search(
&manager->item_config, &dep_request->master_itemid)))
{
int i;
for (i = 0; i < master_item->dep_itemids_num; i++)
{
preprocessor_add_item_view(manager, master_item->dep_itemids[i].first,
items, view);
}
}
break;
}
}
}
/******************************************************************************
* *
* Purpose: return diagnostic top view *
* *
* Parameters: manager - [IN] preprocessing manager *
* client - [IN] IPC client *
* message - [IN] the message with request *
* *
******************************************************************************/
static void preprocessor_get_top_items(zbx_preprocessing_manager_t *manager, zbx_ipc_client_t *client,
zbx_ipc_message_t *message)
{
int limit;
unsigned char *data;
zbx_uint32_t data_len;
zbx_hashset_t items;
zbx_vector_ptr_t view;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
zbx_preprocessor_unpack_top_request(&limit, message->data);
zbx_hashset_create(&items, 1024, ZBX_DEFAULT_UINT64_HASH_FUNC, ZBX_DEFAULT_UINT64_COMPARE_FUNC);
zbx_vector_ptr_create(&view);
preprocessor_get_items_view(manager, &items, &view);
zbx_vector_ptr_sort(&view, preproc_sort_item_by_values_desc);
data_len = zbx_preprocessor_pack_top_items_result(&data, (zbx_preproc_item_stats_t **)view.values,
MIN(limit, view.values_num));
zbx_ipc_client_send(client, ZBX_IPC_PREPROCESSOR_TOP_ITEMS_RESULT, data, data_len);
zbx_free(data);
zbx_vector_ptr_destroy(&view);
zbx_hashset_destroy(&items);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
static void preprocessor_get_oldest_preproc_items(zbx_preprocessing_manager_t *manager, zbx_ipc_client_t *client,
zbx_ipc_message_t *message)
{
int limit, i;
unsigned char *data;
zbx_uint32_t data_len;
zbx_hashset_t items;
zbx_vector_ptr_t view, view_preproc;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
zbx_preprocessor_unpack_top_request(&limit, message->data);
zbx_hashset_create(&items, 1024, ZBX_DEFAULT_UINT64_HASH_FUNC, ZBX_DEFAULT_UINT64_COMPARE_FUNC);
zbx_vector_ptr_create(&view);
zbx_vector_ptr_create(&view_preproc);
zbx_vector_ptr_reserve(&view_preproc, (size_t)limit);
preprocessor_get_items_view(manager, &items, &view);
for (i = 0; i < view.values_num && 0 < limit; i++)
{
zbx_preproc_item_stats_t *item;
item = (zbx_preproc_item_stats_t *)view.values[i];
/* only items with preprocessing can slow down queue */
if (0 == item->steps_num)
continue;
zbx_vector_ptr_append(&view_preproc, item);
limit--;
}
data_len = zbx_preprocessor_pack_top_items_result(&data, (zbx_preproc_item_stats_t **)view_preproc.values,
MIN(limit, view_preproc.values_num));
zbx_ipc_client_send(client, ZBX_IPC_PREPROCESSOR_TOP_ITEMS_RESULT, data, data_len);
zbx_free(data);
zbx_vector_ptr_destroy(&view_preproc);
zbx_vector_ptr_destroy(&view);
zbx_hashset_destroy(&items);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
static zbx_hash_t preproc_item_link_hash(const void *d)
{
const zbx_item_link_t *link = (const zbx_item_link_t *)d;
zbx_hash_t hash;
unsigned char kind = link->kind;
hash = ZBX_DEFAULT_UINT64_HASH_FUNC(&link->itemid);
return ZBX_DEFAULT_STRING_HASH_ALGO(&kind, 1, hash);
}
static int preproc_item_link_compare(const void *d1, const void *d2)
{
const zbx_item_link_t *l1 = (const zbx_item_link_t *)d1;
const zbx_item_link_t *l2 = (const zbx_item_link_t *)d2;
ZBX_RETURN_IF_NOT_EQUAL(l1->itemid, l2->itemid);
return (int)l1->kind - (int)l2->kind;
}
/******************************************************************************
* *
* Purpose: initializes preprocessing manager *
* *
* Parameters: manager - [IN] the manager to initialize *
* *
******************************************************************************/
static void preprocessor_init_manager(zbx_preprocessing_manager_t *manager)
{
zabbix_log(LOG_LEVEL_DEBUG, "In %s() workers: %d", __func__, CONFIG_PREPROCESSOR_FORKS);
memset(manager, 0, sizeof(zbx_preprocessing_manager_t));
manager->workers = (zbx_preprocessing_worker_t *)zbx_calloc(NULL, (size_t)CONFIG_PREPROCESSOR_FORKS,
sizeof(zbx_preprocessing_worker_t));
zbx_list_create(&manager->queue);
zbx_list_create(&manager->direct_queue);
zbx_hashset_create_ext(&manager->item_config, 0, ZBX_DEFAULT_UINT64_HASH_FUNC, ZBX_DEFAULT_UINT64_COMPARE_FUNC,
(zbx_clean_func_t)preproc_item_clear,
ZBX_DEFAULT_MEM_MALLOC_FUNC, ZBX_DEFAULT_MEM_REALLOC_FUNC, ZBX_DEFAULT_MEM_FREE_FUNC);
zbx_hashset_create(&manager->linked_items, 0, preproc_item_link_hash, preproc_item_link_compare);
zbx_hashset_create(&manager->history_cache, 1000, ZBX_DEFAULT_UINT64_HASH_FUNC,
ZBX_DEFAULT_UINT64_COMPARE_FUNC);
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
/******************************************************************************
* *
* Purpose: registers preprocessing worker *
* *
* Parameters: manager - [IN] the manager *
* client - [IN] the connected preprocessing worker *
* message - [IN] message received by preprocessing manager *
* *
******************************************************************************/
static void preprocessor_register_worker(zbx_preprocessing_manager_t *manager, zbx_ipc_client_t *client,
zbx_ipc_message_t *message)
{
zbx_preprocessing_worker_t *worker = NULL;
pid_t ppid;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __func__);
memcpy(&ppid, message->data, sizeof(ppid));
if (ppid != getppid())
{
zbx_ipc_client_close(client);
zabbix_log(LOG_LEVEL_DEBUG, "refusing connection from foreign process");
}
else
{
if (CONFIG_PREPROCESSOR_FORKS == manager->worker_count)
{
THIS_SHOULD_NEVER_HAPPEN;
exit(EXIT_FAILURE);
}
worker = (zbx_preprocessing_worker_t *)&manager->workers[manager->worker_count++];
worker->client = client;
preprocessor_assign_tasks(manager);
}
zabbix_log(LOG_LEVEL_DEBUG, "End of %s()", __func__);
}
/******************************************************************************
* *
* Purpose: destroy preprocessing manager *
* *
* Parameters: manager - [IN] the manager to destroy *
* *
******************************************************************************/
static void preprocessor_destroy_manager(zbx_preprocessing_manager_t *manager)
{
zbx_preprocessing_direct_request_t *direct_request;
zbx_preprocessing_request_base_t *base;
zbx_free(manager->workers);
/* this is the place where values are lost */
while (SUCCEED == zbx_list_pop(&manager->direct_queue, (void **)&direct_request))
preprocessor_free_direct_request(direct_request);
zbx_list_destroy(&manager->direct_queue);
while (SUCCEED == zbx_list_pop(&manager->queue, (void **)&base))
preprocessor_free_request(base);
zbx_list_destroy(&manager->queue);
zbx_hashset_destroy(&manager->item_config);
zbx_hashset_destroy(&manager->linked_items);
zbx_hashset_destroy(&manager->history_cache);
}
ZBX_THREAD_ENTRY(preprocessing_manager_thread, args)
{
zbx_ipc_service_t service;
char *error = NULL;
zbx_ipc_client_t *client;
zbx_ipc_message_t *message;
zbx_preprocessing_manager_t manager;
int ret;
double time_stat, time_idle = 0, time_now, time_flush, sec;
zbx_timespec_t timeout = {ZBX_PREPROCESSING_MANAGER_DELAY, 0};
#define STAT_INTERVAL 5 /* if a process is busy and does not sleep then update status not faster than */
/* once in STAT_INTERVAL seconds */
process_type = ((zbx_thread_args_t *)args)->process_type;
server_num = ((zbx_thread_args_t *)args)->server_num;
process_num = ((zbx_thread_args_t *)args)->process_num;
zbx_setproctitle("%s #%d starting", get_process_type_string(process_type), process_num);
zabbix_log(LOG_LEVEL_INFORMATION, "%s #%d started [%s #%d]", get_program_type_string(program_type),
server_num, get_process_type_string(process_type), process_num);
update_selfmon_counter(ZBX_PROCESS_STATE_BUSY);
if (FAIL == zbx_ipc_service_start(&service, ZBX_IPC_SERVICE_PREPROCESSING, &error))
{
zabbix_log(LOG_LEVEL_CRIT, "cannot start preprocessing service: %s", error);
zbx_free(error);
exit(EXIT_FAILURE);
}
preprocessor_init_manager(&manager);
/* initialize statistics */
time_stat = zbx_time();
time_flush = time_stat;
zbx_setproctitle("%s #%d started", get_process_type_string(process_type), process_num);
while (ZBX_IS_RUNNING())
{
time_now = zbx_time();
if (STAT_INTERVAL < time_now - time_stat)
{
zbx_setproctitle("%s #%d [queued " ZBX_FS_UI64 ", processed " ZBX_FS_UI64 " values, idle "
ZBX_FS_DBL " sec during " ZBX_FS_DBL " sec]",
get_process_type_string(process_type), process_num,
manager.queued_num, manager.processed_num, time_idle, time_now - time_stat);
time_stat = time_now;
time_idle = 0;
manager.processed_num = 0;
}
update_selfmon_counter(ZBX_PROCESS_STATE_IDLE);
ret = zbx_ipc_service_recv(&service, &timeout, &client, &message);
update_selfmon_counter(ZBX_PROCESS_STATE_BUSY);
sec = zbx_time();
zbx_update_env(sec);
if (ZBX_IPC_RECV_IMMEDIATE != ret)
time_idle += sec - time_now;
if (NULL != message)
{
switch (message->code)
{
case ZBX_IPC_PREPROCESSOR_WORKER:
preprocessor_register_worker(&manager, client, message);
break;
case ZBX_IPC_PREPROCESSOR_REQUEST:
preprocessor_add_request(&manager, message);
break;
case ZBX_IPC_PREPROCESSOR_RESULT:
preprocessor_add_result(&manager, client, message);
break;
case ZBX_IPC_PREPROCESSOR_DEP_NEXT:
preprocessor_next_dep_request(&manager, client);
break;
case ZBX_IPC_PREPROCESSOR_DEP_RESULT:
preprocessor_process_dep_result(&manager, client, message);
break;
case ZBX_IPC_PREPROCESSOR_DEP_RESULT_CONT:
preprocessor_process_dep_result_cont(&manager, client, message);
break;
case ZBX_IPC_PREPROCESSOR_QUEUE:
zbx_ipc_client_send(client, message->code, (unsigned char *)&manager.queued_num,
sizeof(zbx_uint64_t));
break;
case ZBX_IPC_PREPROCESSOR_TEST_REQUEST:
preprocessor_add_test_request(&manager, client, message);
break;
case ZBX_IPC_PREPROCESSOR_TEST_RESULT:
preprocessor_flush_test_result(&manager, client, message);
break;
case ZBX_IPC_PREPROCESSOR_DIAG_STATS:
preprocessor_get_diag_stats(&manager, client);
break;
case ZBX_IPC_PREPROCESSOR_TOP_ITEMS:
preprocessor_get_top_items(&manager, client, message);
break;
case ZBX_IPC_PREPROCESSOR_TOP_OLDEST_PREPROC_ITEMS:
preprocessor_get_oldest_preproc_items(&manager, client, message);
break;
}
zbx_ipc_message_free(message);
}
if (NULL != client)
zbx_ipc_client_release(client);
if (0 == manager.preproc_num || 1 < time_now - time_flush)
{
dc_flush_history();
time_flush = time_now;
}
}
zbx_setproctitle("%s #%d [terminated]", get_process_type_string(process_type), process_num);
while (1)
zbx_sleep(SEC_PER_MIN);
zbx_ipc_service_close(&service);
preprocessor_destroy_manager(&manager);
#undef STAT_INTERVAL
}