void
attrd_peer_sync(crm_node_t *peer, xmlNode *xml)
{
GHashTableIter aIter;
GHashTableIter vIter;
attribute_t *a = NULL;
attribute_value_t *v = NULL;
xmlNode *sync = create_xml_node(NULL, __FUNCTION__);
crm_xml_add(sync, F_ATTRD_TASK, "sync-response");
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)) {
crm_debug("Syncing %s[%s] = %s to %s", a->id, v->nodename, v->current, peer?peer->uname:"everyone");
build_attribute_xml(sync, a->id, a->set, a->uuid, a->timeout_ms, a->user, v->nodename, v->nodeid, v->current);
}
}
crm_debug("Syncing values to %s", peer?peer->uname:"everyone");
crm_xml_add_int(sync, F_ATTRD_WRITER, election_state(writer));
send_cluster_message(peer, crm_msg_attrd, sync, TRUE);
free_xml(sync);
}
void
attrd_peer_change_cb(enum crm_status_type kind, crm_node_t *peer, const void *data)
{
if(election_state(writer) == election_won
&& kind == crm_status_nstate
&& safe_str_eq(peer->state, CRM_NODE_MEMBER)) {
attrd_peer_sync(peer, NULL);
} else if(kind == crm_status_nstate
&& safe_str_neq(peer->state, CRM_NODE_MEMBER)) {
attrd_peer_remove(peer->uname, __FUNCTION__);
if(peer_writer && safe_str_eq(peer->uname, peer_writer)) {
free(peer_writer);
peer_writer = NULL;
crm_notice("Lost attribute writer %s", peer->uname);
}
} else if(kind == crm_status_processes) {
if(is_set(peer->processes, crm_proc_cpg)) {
crm_update_peer_state(__FUNCTION__, peer, CRM_NODE_MEMBER, 0);
} else {
crm_update_peer_state(__FUNCTION__, peer, CRM_NODE_LOST, 0);
}
}
}
static void
attrd_cib_replaced_cb(const char *event, xmlNode * msg)
{
crm_notice("Updating all attributes after %s event", event);
if(election_state(writer) == election_won) {
write_attributes(TRUE, FALSE);
}
}
static gboolean
attribute_timer_cb(gpointer data)
{
attribute_t *a = data;
crm_trace("Dampen interval expired for %s in state %d", a->id, election_state(writer));
write_or_elect_attribute(a);
return FALSE;
}
static void
attrd_cib_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void *user_data)
{
int level = LOG_ERR;
GHashTableIter iter;
const char *peer = NULL;
attribute_value_t *v = NULL;
char *name = user_data;
attribute_t *a = g_hash_table_lookup(attributes, name);
if(a == NULL) {
crm_info("Attribute %s no longer exists", name);
goto done;
}
a->update = 0;
if (rc == pcmk_ok && call_id < 0) {
rc = call_id;
}
switch (rc) {
case pcmk_ok:
level = LOG_INFO;
last_cib_op_done = call_id;
break;
case -pcmk_err_diff_failed: /* When an attr changes while the CIB is syncing */
case -ETIME: /* When an attr changes while there is a DC election */
case -ENXIO: /* When an attr changes while the CIB is syncing a
* newer config from a node that just came up
*/
level = LOG_WARNING;
break;
}
do_crm_log(level, "Update %d for %s: %s (%d)", call_id, name, pcmk_strerror(rc), rc);
g_hash_table_iter_init(&iter, a->values);
while (g_hash_table_iter_next(&iter, (gpointer *) & peer, (gpointer *) & v)) {
crm_notice("Update %d for %s[%s]=%s: %s (%d)", call_id, a->id, peer, v->requested, pcmk_strerror(rc), rc);
if(rc == pcmk_ok) {
free(v->stored);
v->stored = v->requested;
v->requested = NULL;
} else {
free(v->requested);
v->requested = NULL;
a->changed = TRUE; /* Attempt write out again */
}
}
done:
free(name);
if(a && a->changed && election_state(writer) == election_won) {
write_attribute(a);
}
}
static gboolean
send_attrd_message(crm_node_t * node, xmlNode * data)
{
crm_xml_add(data, F_TYPE, T_ATTRD);
crm_xml_add(data, F_ATTRD_IGNORE_LOCALLY, "atomic-version"); /* Tell older versions to ignore our messages */
crm_xml_add(data, F_ATTRD_VERSION, ATTRD_PROTOCOL_VERSION);
crm_xml_add_int(data, F_ATTRD_WRITER, election_state(writer));
return send_cluster_message(node, crm_msg_attrd, data, TRUE);
}
void
write_or_elect_attribute(attribute_t *a)
{
enum election_result rc = election_state(writer);
if(rc == election_won) {
write_attribute(a);
} else if(rc == election_in_progress) {
crm_trace("Election in progress to determine who will write out %s", a->id);
} else if(peer_writer == NULL) {
crm_info("Starting an election to determine who will write out %s", a->id);
election_vote(writer);
} else {
crm_trace("%s will write out %s, we are in state %d", peer_writer, a->id, rc);
}
}
void
attrd_peer_change_cb(enum crm_status_type kind, crm_node_t *peer, const void *data)
{
if ((kind == crm_status_nstate) || (kind == crm_status_rstate)) {
if (safe_str_eq(peer->state, CRM_NODE_MEMBER)) {
/* If we're the writer, send new peers a list of all attributes
* (unless it's a remote node, which doesn't run its own attrd)
*/
if ((election_state(writer) == election_won)
&& !is_set(peer->flags, crm_remote_node)) {
attrd_peer_sync(peer, NULL);
}
} else {
/* Remove all attribute values associated with lost nodes */
attrd_peer_remove(peer->uname, FALSE, "peer loss");
if (peer_writer && safe_str_eq(peer->uname, peer_writer)) {
free(peer_writer);
peer_writer = NULL;
crm_notice("Lost attribute writer %s", peer->uname);
}
}
}
}
void
attrd_peer_update(crm_node_t *peer, xmlNode *xml, bool filter)
{
bool changed = FALSE;
attribute_value_t *v = NULL;
const char *host = crm_element_value(xml, F_ATTRD_HOST);
const char *attr = crm_element_value(xml, F_ATTRD_ATTRIBUTE);
const char *value = crm_element_value(xml, F_ATTRD_VALUE);
attribute_t *a = g_hash_table_lookup(attributes, attr);
if(a == NULL) {
a = create_attribute(xml);
}
v = g_hash_table_lookup(a->values, host);
if(v == NULL) {
crm_trace("Setting %s[%s] to %s from %s", attr, host, value, peer->uname);
v = calloc(1, sizeof(attribute_value_t));
if(value) {
v->current = strdup(value);
}
v->nodename = strdup(host);
crm_element_value_int(xml, F_ATTRD_IS_REMOTE, &v->is_remote);
g_hash_table_replace(a->values, v->nodename, v);
if (v->is_remote == TRUE) {
crm_remote_peer_cache_add(host);
}
changed = TRUE;
} else if(filter
&& safe_str_neq(v->current, value)
&& safe_str_eq(host, attrd_cluster->uname)) {
xmlNode *sync = create_xml_node(NULL, __FUNCTION__);
crm_notice("%s[%s]: local value '%s' takes priority over '%s' from %s",
a->id, host, v->current, value, peer->uname);
crm_xml_add(sync, F_ATTRD_TASK, "sync-response");
v = g_hash_table_lookup(a->values, host);
build_attribute_xml(sync, a->id, a->set, a->uuid, a->timeout_ms, a->user, v->nodename, v->nodeid, v->current);
crm_xml_add_int(sync, F_ATTRD_WRITER, election_state(writer));
send_cluster_message(peer, crm_msg_attrd, sync, TRUE);
free_xml(sync);
} else if(safe_str_neq(v->current, value)) {
crm_info("Setting %s[%s]: %s -> %s from %s", attr, host, v->current, value, peer->uname);
free(v->current);
if(value) {
v->current = strdup(value);
} else {
v->current = NULL;
}
changed = TRUE;
} else {
crm_trace("Unchanged %s[%s] from %s is %s", attr, host, peer->uname, value);
}
a->changed |= changed;
/* this only involves cluster nodes. */
if(v->nodeid == 0 && (v->is_remote == FALSE)) {
if(crm_element_value_int(xml, F_ATTRD_HOST_ID, (int*)&v->nodeid) == 0) {
/* Create the name/id association */
crm_node_t *peer = crm_get_peer(v->nodeid, host);
crm_trace("We know %s's node id now: %s", peer->uname, peer->uuid);
if(election_state(writer) == election_won) {
write_attributes(FALSE, TRUE);
return;
}
}
}
if(changed) {
if(a->timer) {
crm_trace("Delayed write out (%dms) for %s", a->timeout_ms, a->id);
mainloop_timer_start(a->timer);
} else {
write_or_elect_attribute(a);
}
}
}
void
attrd_peer_message(crm_node_t *peer, xmlNode *xml)
{
int peer_state = 0;
const char *op = crm_element_value(xml, F_ATTRD_TASK);
const char *election_op = crm_element_value(xml, F_CRM_TASK);
if(election_op) {
enum election_result rc = 0;
crm_xml_add(xml, F_CRM_HOST_FROM, peer->uname);
rc = election_count_vote(writer, xml, TRUE);
switch(rc) {
case election_start:
free(peer_writer);
peer_writer = NULL;
election_vote(writer);
break;
case election_lost:
free(peer_writer);
peer_writer = strdup(peer->uname);
break;
default:
election_check(writer);
break;
}
return;
}
crm_element_value_int(xml, F_ATTRD_WRITER, &peer_state);
if(election_state(writer) == election_won
&& peer_state == election_won
&& safe_str_neq(peer->uname, attrd_cluster->uname)) {
crm_notice("Detected another attribute writer: %s", peer->uname);
election_vote(writer);
} else if(peer_state == election_won) {
if(peer_writer == NULL) {
peer_writer = strdup(peer->uname);
crm_notice("Recorded attribute writer: %s", peer->uname);
} else if(safe_str_neq(peer->uname, peer_writer)) {
crm_notice("Recorded new attribute writer: %s (was %s)", peer->uname, peer_writer);
free(peer_writer);
peer_writer = strdup(peer->uname);
}
}
if(safe_str_eq(op, "update")) {
attrd_peer_update(peer, xml, FALSE);
} else if(safe_str_eq(op, "sync")) {
attrd_peer_sync(peer, xml);
} else if(safe_str_eq(op, "peer-remove")) {
const char *host = crm_element_value(xml, F_ATTRD_HOST);
attrd_peer_remove(host, peer->uname);
} else if(safe_str_eq(op, "sync-response")
&& safe_str_neq(peer->uname, attrd_cluster->uname)) {
xmlNode *child = NULL;
crm_notice("Processing %s from %s", op, peer->uname);
for (child = __xml_first_child(xml); child != NULL; child = __xml_next(child)) {
attrd_peer_update(peer, child, TRUE);
}
}
}
void
attrd_client_message(crm_client_t *client, xmlNode *xml)
{
bool broadcast = FALSE;
static int plus_plus_len = 5;
const char *op = crm_element_value(xml, F_ATTRD_TASK);
if(safe_str_eq(op, "peer-remove")) {
const char *host = crm_element_value(xml, F_ATTRD_HOST);
crm_info("Client %s is requesting all values for %s be removed", client->name, host);
if(host) {
broadcast = TRUE;
}
} else if(safe_str_eq(op, "update")) {
attribute_t *a = NULL;
attribute_value_t *v = NULL;
char *key = crm_element_value_copy(xml, F_ATTRD_KEY);
char *set = crm_element_value_copy(xml, F_ATTRD_SET);
char *host = crm_element_value_copy(xml, F_ATTRD_HOST);
const char *attr = crm_element_value(xml, F_ATTRD_ATTRIBUTE);
const char *value = crm_element_value(xml, F_ATTRD_VALUE);
a = g_hash_table_lookup(attributes, attr);
if(host == NULL) {
crm_trace("Inferring host");
host = strdup(attrd_cluster->uname);
crm_xml_add(xml, F_ATTRD_HOST, host);
crm_xml_add_int(xml, F_ATTRD_HOST_ID, attrd_cluster->nodeid);
}
if (value) {
int offset = 1;
int int_value = 0;
int value_len = strlen(value);
if (value_len < (plus_plus_len + 2)
|| value[plus_plus_len] != '+'
|| (value[plus_plus_len + 1] != '+' && value[plus_plus_len + 1] != '=')) {
goto send;
}
if(a) {
v = g_hash_table_lookup(a->values, host);
}
if(v) {
int_value = char2score(v->current);
}
if (value[plus_plus_len + 1] != '+') {
const char *offset_s = value + (plus_plus_len + 2);
offset = char2score(offset_s);
}
int_value += offset;
if (int_value > INFINITY) {
int_value = INFINITY;
}
crm_info("Expanded %s=%s to %d", attr, value, int_value);
crm_xml_add_int(xml, F_ATTRD_VALUE, int_value);
}
send:
if(peer_writer == NULL && election_state(writer) != election_in_progress) {
crm_info("Starting an election to determine the writer");
election_vote(writer);
}
crm_info("Broadcasting %s[%s] = %s%s", attr, host, value, election_state(writer) == election_won?" (writer)":"");
broadcast = TRUE;
free(key);
free(set);
free(host);
}
if(broadcast) {
crm_xml_add_int(xml, F_ATTRD_WRITER, election_state(writer));
send_cluster_message(NULL, crm_msg_attrd, xml, TRUE);
}
}
void
attrd_peer_update(crm_node_t *peer, xmlNode *xml, const char *host, bool filter)
{
bool changed = FALSE;
attribute_t *a;
attribute_value_t *v = NULL;
int dampen = 0;
const char *op = crm_element_value(xml, F_ATTRD_TASK);
const char *attr = crm_element_value(xml, F_ATTRD_ATTRIBUTE);
const char *value = crm_element_value(xml, F_ATTRD_VALUE);
const char *dvalue = crm_element_value(xml, F_ATTRD_DAMPEN);
if (attr == NULL) {
crm_warn("Peer update did not specify attribute");
return;
}
a = g_hash_table_lookup(attributes, attr);
if(a == NULL) {
if (op == NULL /* The xml children from an ATTRD_OP_SYNC_RESPONSE have no F_ATTRD_TASK */
|| safe_str_eq(op, ATTRD_OP_UPDATE)
|| safe_str_eq(op, ATTRD_OP_UPDATE_BOTH)) {
a = create_attribute(xml);
} else {
crm_warn("Update error (attribute %s not found)", attr);
return;
}
}
if (op == NULL /* The xml children from an ATTRD_OP_SYNC_RESPONSE have no F_ATTRD_TASK */
|| safe_str_eq(op, ATTRD_OP_UPDATE_BOTH)
|| safe_str_eq(op, ATTRD_OP_UPDATE_DELAY)) {
if (dvalue) {
dampen = crm_get_msec(dvalue);
if (dampen >= 0) {
if (a->timeout_ms != dampen) {
mainloop_timer_stop(a->timer);
mainloop_timer_del(a->timer);
a->timeout_ms = dampen;
if (dampen > 0) {
a->timer = mainloop_timer_add(a->id, a->timeout_ms, FALSE, attribute_timer_cb, a);
crm_info("Update attribute %s with delay %dms (%s)", a->id, dampen, dvalue);
} else {
a->timer = NULL;
crm_info("Update attribute %s with not delay", a->id);
}
//if dampen is changed, attrd writes in a current value immediately.
write_or_elect_attribute(a);
if (safe_str_eq(op, ATTRD_OP_UPDATE_DELAY)) {
return;
}
} else {
if (safe_str_eq(op, ATTRD_OP_UPDATE_DELAY)) {
crm_trace("Unchanged attribute %s with delay %dms (%s).(ATTRD_OP_UPDATE_DELAY)", a->id, dampen, dvalue);
return;
}
}
} else {
crm_warn("Update error (A positive number is necessary for delay parameter. attribute %s : %dms (%s))", a->id, dampen, dvalue);
return;
}
} else {
crm_warn("Update error (delay parameter is necessary for the update of the attribute %s)", a->id);
return;
}
}
if(host == NULL) {
GHashTableIter vIter;
g_hash_table_iter_init(&vIter, a->values);
crm_debug("Setting %s for all hosts to %s", attr, value);
xml_remove_prop(xml, F_ATTRD_HOST_ID);
while (g_hash_table_iter_next(&vIter, (gpointer *) & host, NULL)) {
attrd_peer_update(peer, xml, host, filter);
}
return;
}
v = attrd_lookup_or_create_value(a->values, host, xml);
if(filter
&& safe_str_neq(v->current, value)
&& safe_str_eq(host, attrd_cluster->uname)) {
xmlNode *sync = create_xml_node(NULL, __FUNCTION__);
crm_notice("%s[%s]: local value '%s' takes priority over '%s' from %s",
a->id, host, v->current, value, peer->uname);
crm_xml_add(sync, F_ATTRD_TASK, ATTRD_OP_SYNC_RESPONSE);
v = g_hash_table_lookup(a->values, host);
build_attribute_xml(sync, a->id, a->set, a->uuid, a->timeout_ms, a->user, a->is_private,
v->nodename, v->nodeid, v->current);
crm_xml_add_int(sync, F_ATTRD_WRITER, election_state(writer));
send_attrd_message(peer, sync);
free_xml(sync);
} else if(safe_str_neq(v->current, value)) {
crm_info("Setting %s[%s]: %s -> %s from %s", attr, host, v->current, value, peer->uname);
free(v->current);
if(value) {
v->current = strdup(value);
} else {
v->current = NULL;
}
changed = TRUE;
} else {
crm_trace("Unchanged %s[%s] from %s is %s", attr, host, peer->uname, value);
}
a->changed |= changed;
if(changed) {
if(a->timer) {
crm_trace("Delayed write out (%dms) for %s", a->timeout_ms, a->id);
mainloop_timer_start(a->timer);
} else {
write_or_elect_attribute(a);
}
}
/* this only involves cluster nodes. */
if(v->nodeid == 0 && (v->is_remote == FALSE)) {
if(crm_element_value_int(xml, F_ATTRD_HOST_ID, (int*)&v->nodeid) == 0) {
/* Create the name/id association */
crm_node_t *peer = crm_get_peer(v->nodeid, host);
crm_trace("We know %s's node id now: %s", peer->uname, peer->uuid);
if(election_state(writer) == election_won) {
write_attributes(FALSE, TRUE);
return;
}
}
}
}
void
attrd_peer_message(crm_node_t *peer, xmlNode *xml)
{
int peer_state = 0;
const char *v = crm_element_value(xml, F_ATTRD_VERSION);
const char *op = crm_element_value(xml, F_ATTRD_TASK);
const char *election_op = crm_element_value(xml, F_CRM_TASK);
const char *host = crm_element_value(xml, F_ATTRD_HOST);
if(election_op) {
enum election_result rc = 0;
crm_xml_add(xml, F_CRM_HOST_FROM, peer->uname);
rc = election_count_vote(writer, xml, TRUE);
switch(rc) {
case election_start:
free(peer_writer);
peer_writer = NULL;
election_vote(writer);
break;
case election_lost:
free(peer_writer);
peer_writer = strdup(peer->uname);
break;
default:
election_check(writer);
break;
}
return;
} else if(v == NULL) {
/* From the non-atomic version */
if (safe_str_eq(op, ATTRD_OP_UPDATE)) {
const char *name = crm_element_value(xml, F_ATTRD_ATTRIBUTE);
crm_trace("Compatibility update of %s from %s", name, peer->uname);
attrd_peer_update(peer, xml, host, FALSE);
} else if (safe_str_eq(op, ATTRD_OP_FLUSH)) {
const char *name = crm_element_value(xml, F_ATTRD_ATTRIBUTE);
attribute_t *a = g_hash_table_lookup(attributes, name);
if(a) {
crm_trace("Compatibility write-out of %s for %s from %s", a->id, op, peer->uname);
write_or_elect_attribute(a);
}
} else if (safe_str_eq(op, ATTRD_OP_REFRESH)) {
GHashTableIter aIter;
attribute_t *a = NULL;
g_hash_table_iter_init(&aIter, attributes);
while (g_hash_table_iter_next(&aIter, NULL, (gpointer *) & a)) {
crm_trace("Compatibility write-out of %s for %s from %s", a->id, op, peer->uname);
write_or_elect_attribute(a);
}
}
}
crm_element_value_int(xml, F_ATTRD_WRITER, &peer_state);
if(election_state(writer) == election_won
&& peer_state == election_won
&& safe_str_neq(peer->uname, attrd_cluster->uname)) {
crm_notice("Detected another attribute writer: %s", peer->uname);
election_vote(writer);
} else if(peer_state == election_won) {
if(peer_writer == NULL) {
peer_writer = strdup(peer->uname);
crm_notice("Recorded attribute writer: %s", peer->uname);
} else if(safe_str_neq(peer->uname, peer_writer)) {
crm_notice("Recorded new attribute writer: %s (was %s)", peer->uname, peer_writer);
free(peer_writer);
peer_writer = strdup(peer->uname);
}
}
if (safe_str_eq(op, ATTRD_OP_UPDATE) || safe_str_eq(op, ATTRD_OP_UPDATE_BOTH) || safe_str_eq(op, ATTRD_OP_UPDATE_DELAY)) {
attrd_peer_update(peer, xml, host, FALSE);
} else if (safe_str_eq(op, ATTRD_OP_SYNC)) {
attrd_peer_sync(peer, xml);
} else if (safe_str_eq(op, ATTRD_OP_PEER_REMOVE)) {
attrd_peer_remove(host, TRUE, peer->uname);
} else if (safe_str_eq(op, ATTRD_OP_SYNC_RESPONSE)
&& safe_str_neq(peer->uname, attrd_cluster->uname)) {
xmlNode *child = NULL;
crm_info("Processing %s from %s", op, peer->uname);
for (child = __xml_first_child(xml); child != NULL; child = __xml_next(child)) {
host = crm_element_value(child, F_ATTRD_HOST);
attrd_peer_update(peer, child, host, TRUE);
}
}
}
/*!
* \internal
* \brief Respond to a client update request
*
* \param[in] xml Root of request XML
*
* \return void
*/
void
attrd_client_update(xmlNode *xml)
{
attribute_t *a = NULL;
attribute_value_t *v = NULL;
char *key = crm_element_value_copy(xml, F_ATTRD_KEY);
char *set = crm_element_value_copy(xml, F_ATTRD_SET);
char *host = crm_element_value_copy(xml, F_ATTRD_HOST);
const char *attr = crm_element_value(xml, F_ATTRD_ATTRIBUTE);
const char *value = crm_element_value(xml, F_ATTRD_VALUE);
const char *regex = crm_element_value(xml, F_ATTRD_REGEX);
/* If a regex was specified, broadcast a message for each match */
if ((attr == NULL) && regex) {
GHashTableIter aIter;
regex_t *r_patt = calloc(1, sizeof(regex_t));
crm_debug("Setting %s to %s", regex, value);
if (regcomp(r_patt, regex, REG_EXTENDED)) {
crm_err("Bad regex '%s' for update", regex);
} else {
g_hash_table_iter_init(&aIter, attributes);
while (g_hash_table_iter_next(&aIter, (gpointer *) & attr, NULL)) {
int status = regexec(r_patt, attr, 0, NULL, 0);
if (status == 0) {
crm_trace("Matched %s with %s", attr, regex);
crm_xml_add(xml, F_ATTRD_ATTRIBUTE, attr);
send_attrd_message(NULL, xml);
}
}
}
free(key);
free(set);
free(host);
regfree(r_patt);
free(r_patt);
return;
} else if (attr == NULL) {
crm_err("Update request did not specify attribute or regular expression");
return;
}
if (host == NULL) {
crm_trace("Inferring host");
host = strdup(attrd_cluster->uname);
crm_xml_add(xml, F_ATTRD_HOST, host);
crm_xml_add_int(xml, F_ATTRD_HOST_ID, attrd_cluster->nodeid);
}
a = g_hash_table_lookup(attributes, attr);
/* If value was specified using ++ or += notation, expand to real value */
if (value) {
int offset = 1;
int int_value = 0;
static const int plus_plus_len = 5;
if ((strlen(value) >= (plus_plus_len + 2)) && (value[plus_plus_len] == '+')
&& ((value[plus_plus_len + 1] == '+') || (value[plus_plus_len + 1] == '='))) {
if (a) {
v = g_hash_table_lookup(a->values, host);
}
if (v) {
int_value = char2score(v->current);
}
if (value[plus_plus_len + 1] != '+') {
const char *offset_s = value + (plus_plus_len + 2);
offset = char2score(offset_s);
}
int_value += offset;
if (int_value > INFINITY) {
int_value = INFINITY;
}
crm_info("Expanded %s=%s to %d", attr, value, int_value);
crm_xml_add_int(xml, F_ATTRD_VALUE, int_value);
/* Replacing the value frees the previous memory, so re-query it */
value = crm_element_value(xml, F_ATTRD_VALUE);
}
}
if ((peer_writer == NULL) && (election_state(writer) != election_in_progress)) {
crm_info("Starting an election to determine the writer");
election_vote(writer);
}
crm_debug("Broadcasting %s[%s] = %s%s", attr, host, value,
((election_state(writer) == election_won)? " (writer)" : ""));
free(key);
free(set);
free(host);
send_attrd_message(NULL, xml); /* ends up at attrd_peer_message() */
}
void
attrd_client_message(crm_client_t *client, xmlNode *xml)
{
bool broadcast = FALSE;
static int plus_plus_len = 5;
const char *op = crm_element_value(xml, F_ATTRD_TASK);
if(safe_str_eq(op, "peer-remove")) {
const char *host = crm_element_value(xml, F_ATTRD_HOST);
crm_info("Client %s is requesting all values for %s be removed", client->name, host);
if(host) {
broadcast = TRUE;
}
} else if(safe_str_eq(op, "update")) {
attribute_t *a = NULL;
attribute_value_t *v = NULL;
char *key = crm_element_value_copy(xml, F_ATTRD_KEY);
char *set = crm_element_value_copy(xml, F_ATTRD_SET);
char *host = crm_element_value_copy(xml, F_ATTRD_HOST);
const char *attr = crm_element_value(xml, F_ATTRD_ATTRIBUTE);
const char *value = crm_element_value(xml, F_ATTRD_VALUE);
const char *regex = crm_element_value(xml, F_ATTRD_REGEX);
if(attr == NULL && regex) {
GHashTableIter aIter;
regex_t *r_patt = calloc(1, sizeof(regex_t));
crm_debug("Setting %s to %s", regex, value);
if (regcomp(r_patt, regex, REG_EXTENDED)) {
crm_err("Bad regex '%s' for update", regex);
} else {
g_hash_table_iter_init(&aIter, attributes);
while (g_hash_table_iter_next(&aIter, (gpointer *) & attr, NULL)) {
int status = regexec(r_patt, attr, 0, NULL, 0);
if(status == 0) {
crm_trace("Matched %s with %s", attr, regex);
crm_xml_add(xml, F_ATTRD_ATTRIBUTE, attr);
send_attrd_message(NULL, xml);
}
}
}
free(key);
free(set);
free(host);
regfree(r_patt);
free(r_patt);
return;
} else if(host == NULL) {
crm_trace("Inferring host");
host = strdup(attrd_cluster->uname);
crm_xml_add(xml, F_ATTRD_HOST, host);
crm_xml_add_int(xml, F_ATTRD_HOST_ID, attrd_cluster->nodeid);
}
a = g_hash_table_lookup(attributes, attr);
if (value) {
int offset = 1;
int int_value = 0;
int value_len = strlen(value);
if (value_len < (plus_plus_len + 2)
|| value[plus_plus_len] != '+'
|| (value[plus_plus_len + 1] != '+' && value[plus_plus_len + 1] != '=')) {
goto send;
}
if(a) {
v = g_hash_table_lookup(a->values, host);
}
if(v) {
int_value = char2score(v->current);
}
if (value[plus_plus_len + 1] != '+') {
const char *offset_s = value + (plus_plus_len + 2);
offset = char2score(offset_s);
}
int_value += offset;
if (int_value > INFINITY) {
int_value = INFINITY;
}
crm_info("Expanded %s=%s to %d", attr, value, int_value);
crm_xml_add_int(xml, F_ATTRD_VALUE, int_value);
}
send:
if(peer_writer == NULL && election_state(writer) != election_in_progress) {
crm_info("Starting an election to determine the writer");
election_vote(writer);
}
crm_debug("Broadcasting %s[%s] = %s%s", attr, host, value, election_state(writer) == election_won?" (writer)":"");
broadcast = TRUE;
free(key);
free(set);
free(host);
} else if(safe_str_eq(op, "refresh")) {
crm_info("Updating all attributes");
write_attributes(TRUE, FALSE);
}
if(broadcast) {
/* Ends up at attrd_peer_message() */
send_attrd_message(NULL, xml);
}
}
void
attrd_peer_update(crm_node_t *peer, xmlNode *xml, const char *host, bool filter)
{
bool changed = FALSE;
attribute_value_t *v = NULL;
const char *attr = crm_element_value(xml, F_ATTRD_ATTRIBUTE);
const char *value = crm_element_value(xml, F_ATTRD_VALUE);
attribute_t *a = g_hash_table_lookup(attributes, attr);
if(a == NULL) {
a = create_attribute(xml);
}
if(host == NULL) {
GHashTableIter vIter;
g_hash_table_iter_init(&vIter, a->values);
crm_debug("Setting %s for all hosts to %s", attr, value);
xml_remove_prop(xml, F_ATTRD_HOST_ID);
while (g_hash_table_iter_next(&vIter, (gpointer *) & host, NULL)) {
attrd_peer_update(peer, xml, host, filter);
}
return;
}
v = attrd_lookup_or_create_value(a->values, host, xml);
if(filter
&& safe_str_neq(v->current, value)
&& safe_str_eq(host, attrd_cluster->uname)) {
xmlNode *sync = create_xml_node(NULL, __FUNCTION__);
crm_notice("%s[%s]: local value '%s' takes priority over '%s' from %s",
a->id, host, v->current, value, peer->uname);
crm_xml_add(sync, F_ATTRD_TASK, ATTRD_OP_SYNC_RESPONSE);
v = g_hash_table_lookup(a->values, host);
build_attribute_xml(sync, a->id, a->set, a->uuid, a->timeout_ms, a->user, a->is_private,
v->nodename, v->nodeid, v->current);
crm_xml_add_int(sync, F_ATTRD_WRITER, election_state(writer));
send_attrd_message(peer, sync);
free_xml(sync);
} else if(safe_str_neq(v->current, value)) {
crm_info("Setting %s[%s]: %s -> %s from %s", attr, host, v->current, value, peer->uname);
free(v->current);
if(value) {
v->current = strdup(value);
} else {
v->current = NULL;
}
changed = TRUE;
} else {
crm_trace("Unchanged %s[%s] from %s is %s", attr, host, peer->uname, value);
}
a->changed |= changed;
if(changed) {
if(a->timer) {
crm_trace("Delayed write out (%dms) for %s", a->timeout_ms, a->id);
mainloop_timer_start(a->timer);
} else {
write_or_elect_attribute(a);
}
}
/* this only involves cluster nodes. */
if(v->nodeid == 0 && (v->is_remote == FALSE)) {
if(crm_element_value_int(xml, F_ATTRD_HOST_ID, (int*)&v->nodeid) == 0) {
/* Create the name/id association */
crm_node_t *peer = crm_get_peer(v->nodeid, host);
crm_trace("We know %s's node id now: %s", peer->uname, peer->uuid);
if(election_state(writer) == election_won) {
write_attributes(FALSE, TRUE);
return;
}
}
}
}
