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/*
* Copyright 2013-2022 the Pacemaker project contributors
*
* The version control history for this file may have further details.
*
* This source code is licensed under the GNU General Public License version 2
* or later (GPLv2+) WITHOUT ANY WARRANTY.
*/
#include <crm_internal.h>
#include <errno.h>
#include <stdbool.h>
#include <stdlib.h>
#include <glib.h>
#include <crm/msg_xml.h>
#include <crm/common/logging.h>
#include <crm/common/results.h>
#include <crm/common/strings_internal.h>
#include <crm/common/xml.h>
#include "pacemaker-attrd.h"
static attribute_t *
attrd_create_attribute(xmlNode *xml)
{
int dampen = 0;
const char *value = crm_element_value(xml, PCMK__XA_ATTR_DAMPENING);
attribute_t *a = calloc(1, sizeof(attribute_t));
CRM_ASSERT(a != NULL);
a->id = crm_element_value_copy(xml, PCMK__XA_ATTR_NAME);
a->set_id = crm_element_value_copy(xml, PCMK__XA_ATTR_SET);
a->set_type = crm_element_value_copy(xml, PCMK__XA_ATTR_SET_TYPE);
a->uuid = crm_element_value_copy(xml, PCMK__XA_ATTR_UUID);
a->values = pcmk__strikey_table(NULL, attrd_free_attribute_value);
crm_element_value_int(xml, PCMK__XA_ATTR_IS_PRIVATE, &a->is_private);
a->user = crm_element_value_copy(xml, PCMK__XA_ATTR_USER);
crm_trace("Performing all %s operations as user '%s'", a->id, a->user);
if (value != NULL) {
dampen = crm_get_msec(value);
}
crm_trace("Created attribute %s with %s write delay", a->id,
(a->timeout_ms == 0)? "no" : pcmk__readable_interval(a->timeout_ms));
if(dampen > 0) {
a->timeout_ms = dampen;
a->timer = attrd_add_timer(a->id, a->timeout_ms, a);
} else if (dampen < 0) {
crm_warn("Ignoring invalid delay %s for attribute %s", value, a->id);
}
g_hash_table_replace(attributes, a->id, a);
return a;
}
static int
attrd_update_dampening(attribute_t *a, xmlNode *xml, const char *attr)
{
const char *dvalue = crm_element_value(xml, PCMK__XA_ATTR_DAMPENING);
int dampen = 0;
if (dvalue == NULL) {
crm_warn("Could not update %s: peer did not specify value for delay",
attr);
return EINVAL;
}
dampen = crm_get_msec(dvalue);
if (dampen < 0) {
crm_warn("Could not update %s: invalid delay value %dms (%s)",
attr, dampen, dvalue);
return EINVAL;
}
if (a->timeout_ms != dampen) {
mainloop_timer_del(a->timer);
a->timeout_ms = dampen;
if (dampen > 0) {
a->timer = attrd_add_timer(attr, a->timeout_ms, a);
crm_info("Update attribute %s delay to %dms (%s)",
attr, dampen, dvalue);
} else {
a->timer = NULL;
crm_info("Update attribute %s to remove delay", attr);
}
/* If dampening changed, do an immediate write-out,
* otherwise repeated dampening changes would prevent write-outs
*/
attrd_write_or_elect_attribute(a);
}
return pcmk_rc_ok;
}
GHashTable *attributes = NULL;
/*!
* \internal
* \brief Create an XML representation of an attribute for use in peer messages
*
* \param[in,out] parent Create attribute XML as child element of this
* \param[in] a Attribute to represent
* \param[in] v Attribute value to represent
* \param[in] force_write If true, value should be written even if unchanged
*
* \return XML representation of attribute
*/
xmlNode *
attrd_add_value_xml(xmlNode *parent, const attribute_t *a,
const attribute_value_t *v, bool force_write)
{
xmlNode *xml = create_xml_node(parent, __func__);
crm_xml_add(xml, PCMK__XA_ATTR_NAME, a->id);
crm_xml_add(xml, PCMK__XA_ATTR_SET, a->set_id);
crm_xml_add(xml, PCMK__XA_ATTR_UUID, a->uuid);
crm_xml_add(xml, PCMK__XA_ATTR_USER, a->user);
pcmk__xe_add_node(xml, v->nodename, v->nodeid);
if (v->is_remote != 0) {
crm_xml_add_int(xml, PCMK__XA_ATTR_IS_REMOTE, 1);
}
crm_xml_add(xml, PCMK__XA_ATTR_VALUE, v->current);
crm_xml_add_int(xml, PCMK__XA_ATTR_DAMPENING, a->timeout_ms / 1000);
crm_xml_add_int(xml, PCMK__XA_ATTR_IS_PRIVATE, a->is_private);
crm_xml_add_int(xml, PCMK__XA_ATTR_FORCE, force_write);
return xml;
}
void
attrd_clear_value_seen(void)
{
GHashTableIter aIter;
GHashTableIter vIter;
attribute_t *a;
attribute_value_t *v = NULL;
g_hash_table_iter_init(&aIter, attributes);
while (g_hash_table_iter_next(&aIter, NULL, (gpointer *) & a)) {
g_hash_table_iter_init(&vIter, a->values);
while (g_hash_table_iter_next(&vIter, NULL, (gpointer *) & v)) {
v->seen = FALSE;
crm_trace("Clear seen flag %s[%s] = %s.", a->id, v->nodename, v->current);
}
}
}
attribute_t *
attrd_populate_attribute(xmlNode *xml, const char *attr)
{
attribute_t *a = NULL;
bool update_both = false;
const char *op = crm_element_value(xml, PCMK__XA_TASK);
// NULL because PCMK__ATTRD_CMD_SYNC_RESPONSE has no PCMK__XA_TASK
update_both = pcmk__str_eq(op, PCMK__ATTRD_CMD_UPDATE_BOTH,
pcmk__str_null_matches);
// Look up or create attribute entry
a = g_hash_table_lookup(attributes, attr);
if (a == NULL) {
if (update_both || pcmk__str_eq(op, PCMK__ATTRD_CMD_UPDATE, pcmk__str_none)) {
a = attrd_create_attribute(xml);
} else {
crm_warn("Could not update %s: attribute not found", attr);
return NULL;
}
}
// Update attribute dampening
if (update_both || pcmk__str_eq(op, PCMK__ATTRD_CMD_UPDATE_DELAY, pcmk__str_none)) {
int rc = attrd_update_dampening(a, xml, attr);
if (rc != pcmk_rc_ok || !update_both) {
return NULL;
}
}
return a;
}
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