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diff --git a/daemons/controld/controld_metadata.c b/daemons/controld/controld_metadata.c
index f8a854897a..ddcb0594c6 100644
--- a/daemons/controld/controld_metadata.c
+++ b/daemons/controld/controld_metadata.c
@@ -1,377 +1,380 @@
/*
* Copyright 2017-2021 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 <stdio.h>
#include <glib.h>
#include <regex.h>
#include <crm/crm.h>
#include <crm/lrmd.h>
#include <pacemaker-controld.h>
#if ENABLE_VERSIONED_ATTRS
static regex_t *version_format_regex = NULL;
#endif
static void
ra_param_free(void *param)
{
if (param) {
struct ra_param_s *p = (struct ra_param_s *) param;
if (p->rap_name) {
free(p->rap_name);
}
free(param);
}
}
static void
metadata_free(void *metadata)
{
if (metadata) {
struct ra_metadata_s *md = (struct ra_metadata_s *) metadata;
if (md->ra_version) {
free(md->ra_version);
}
g_list_free_full(md->ra_params, ra_param_free);
free(metadata);
}
}
GHashTable *
metadata_cache_new()
{
return pcmk__strkey_table(free, metadata_free);
}
void
metadata_cache_free(GHashTable *mdc)
{
if (mdc) {
crm_trace("Destroying metadata cache with %d members", g_hash_table_size(mdc));
g_hash_table_destroy(mdc);
}
}
void
metadata_cache_reset(GHashTable *mdc)
{
if (mdc) {
crm_trace("Resetting metadata cache with %d members",
g_hash_table_size(mdc));
g_hash_table_remove_all(mdc);
}
}
#if ENABLE_VERSIONED_ATTRS
static gboolean
valid_version_format(const char *version)
{
if (version == NULL) {
return FALSE;
}
if (version_format_regex == NULL) {
/* The OCF standard allows free-form versioning, but for our purposes of
* versioned resource and operation attributes, we constrain it to
* dot-separated numbers. Agents are still free to use other schemes,
* but we can't determine attributes based on them.
*/
const char *regex_string = "^[[:digit:]]+([.][[:digit:]]+)*$";
version_format_regex = calloc(1, sizeof(regex_t));
regcomp(version_format_regex, regex_string, REG_EXTENDED | REG_NOSUB);
/* If our regex doesn't compile, it's a bug on our side, so CRM_CHECK()
* will give us a core dump to catch it. Pretend the version is OK
* because we don't want our mistake to break versioned attributes
* (which should only ever happen in a development branch anyway).
*/
CRM_CHECK(version_format_regex != NULL, return TRUE);
}
return regexec(version_format_regex, version, 0, NULL, 0) == 0;
}
#endif
void
metadata_cache_fini()
{
#if ENABLE_VERSIONED_ATTRS
if (version_format_regex) {
regfree(version_format_regex);
free(version_format_regex);
version_format_regex = NULL;
}
#endif
}
#if ENABLE_VERSIONED_ATTRS
static char *
ra_version_from_xml(xmlNode *metadata_xml, const lrmd_rsc_info_t *rsc)
{
const char *version = crm_element_value(metadata_xml, XML_ATTR_VERSION);
if (version == NULL) {
crm_debug("Metadata for %s:%s:%s does not specify a version",
rsc->standard, rsc->provider, rsc->type);
version = PCMK_DEFAULT_AGENT_VERSION;
} else if (!valid_version_format(version)) {
crm_notice("%s:%s:%s metadata version has unrecognized format",
rsc->standard, rsc->provider, rsc->type);
version = PCMK_DEFAULT_AGENT_VERSION;
} else {
crm_debug("Metadata for %s:%s:%s has version %s",
rsc->standard, rsc->provider, rsc->type, version);
}
return strdup(version);
}
#endif
static struct ra_param_s *
ra_param_from_xml(xmlNode *param_xml)
{
const char *param_name = crm_element_value(param_xml, "name");
const char *value;
struct ra_param_s *p;
p = calloc(1, sizeof(struct ra_param_s));
if (p == NULL) {
crm_crit("Could not allocate memory for resource metadata");
return NULL;
}
p->rap_name = strdup(param_name);
if (p->rap_name == NULL) {
crm_crit("Could not allocate memory for resource metadata");
free(p);
return NULL;
}
value = crm_element_value(param_xml, "reloadable");
if (crm_is_true(value)) {
controld_set_ra_param_flags(p, ra_param_reloadable);
}
value = crm_element_value(param_xml, "unique");
if (crm_is_true(value)) {
controld_set_ra_param_flags(p, ra_param_unique);
}
value = crm_element_value(param_xml, "private");
if (crm_is_true(value)) {
controld_set_ra_param_flags(p, ra_param_private);
}
return p;
}
// Check what version of the OCF standard a resource agent supports
static void
check_ra_ocf_version(struct ra_metadata_s *md, const char *key,
xmlNode *version_element)
{
xmlChar *content = NULL;
if (version_element != NULL) {
content = xmlNodeGetContent(version_element);
}
if (content == NULL) {
crm_warn("%s does not advertise OCF version supported", key);
return;
}
if (compare_version((const char *) content, "1.1") >= 0) {
controld_set_ra_flags(md, key, ra_supports_ocf_1_1);
}
if (compare_version((const char *) content, "2") >= 0) {
- crm_warn("%s supports OCF version %s and we don't (agent may not work "
- "properly with this version of Pacemaker)",
+ crm_warn("%s supports OCF version %s (this Pacemaker version supports "
+ PCMK_OCF_VERSION " and might not work properly with agent)",
+ key, (const char *) content);
+ } else if (compare_version((const char *) content, PCMK_OCF_VERSION) > 0) {
+ crm_info("%s supports OCF version %s (this Pacemaker version supports "
+ PCMK_OCF_VERSION " and might not use all agent features)",
key, (const char *) content);
} else {
- crm_debug("%s advertises support for OCF version %s", key,
- (const char *) content);
+ crm_debug("%s supports OCF version %s", key, (const char *) content);
}
xmlFree(content);
}
struct ra_metadata_s *
metadata_cache_update(GHashTable *mdc, lrmd_rsc_info_t *rsc,
const char *metadata_str)
{
char *key = NULL;
xmlNode *metadata = NULL;
xmlNode *match = NULL;
struct ra_metadata_s *md = NULL;
bool any_private_params = false;
CRM_CHECK(mdc && rsc && metadata_str, return NULL);
key = crm_generate_ra_key(rsc->standard, rsc->provider, rsc->type);
if (!key) {
crm_crit("Could not allocate memory for resource metadata");
goto err;
}
metadata = string2xml(metadata_str);
if (!metadata) {
crm_err("Metadata for %s:%s:%s is not valid XML",
rsc->standard, rsc->provider, rsc->type);
goto err;
}
md = calloc(1, sizeof(struct ra_metadata_s));
if (md == NULL) {
crm_crit("Could not allocate memory for resource metadata");
goto err;
}
#if ENABLE_VERSIONED_ATTRS
md->ra_version = ra_version_from_xml(metadata, rsc);
#endif
if (strcmp(rsc->standard, PCMK_RESOURCE_CLASS_OCF) == 0) {
check_ra_ocf_version(md, key, first_named_child(metadata, "version"));
}
// Check supported actions
match = first_named_child(metadata, "actions");
for (match = first_named_child(match, "action"); match != NULL;
match = crm_next_same_xml(match)) {
const char *action_name = crm_element_value(match, "name");
if (pcmk__str_eq(action_name, CRMD_ACTION_RELOAD_AGENT,
pcmk__str_casei)) {
controld_set_ra_flags(md, key, ra_supports_reload_agent);
// @COMPAT pre-OCF-1.1 resource agents
} else if (pcmk__str_eq(action_name, CRMD_ACTION_RELOAD,
pcmk__str_casei)) {
controld_set_ra_flags(md, key, ra_supports_reload);
}
}
// Build a parameter list
match = first_named_child(metadata, "parameters");
for (match = first_named_child(match, "parameter"); match != NULL;
match = crm_next_same_xml(match)) {
const char *param_name = crm_element_value(match, "name");
if (param_name == NULL) {
crm_warn("Metadata for %s:%s:%s has parameter without a name",
rsc->standard, rsc->provider, rsc->type);
} else {
struct ra_param_s *p = ra_param_from_xml(match);
if (p == NULL) {
goto err;
}
if (pcmk_is_set(p->rap_flags, ra_param_private)) {
any_private_params = true;
}
md->ra_params = g_list_prepend(md->ra_params, p);
}
}
/* Newer resource agents support the "private" parameter attribute to
* indicate sensitive parameters. For backward compatibility with older
* agents, implicitly treat a few common names as private when the agent
* doesn't specify any explicitly.
*/
if (!any_private_params) {
for (GList *iter = md->ra_params; iter != NULL; iter = iter->next) {
struct ra_param_s *p = iter->data;
if (pcmk__str_any_of(p->rap_name, "password", "passwd", "user",
NULL)) {
controld_set_ra_param_flags(p, ra_param_private);
}
}
}
g_hash_table_replace(mdc, key, md);
free_xml(metadata);
return md;
err:
free(key);
free_xml(metadata);
metadata_free(md);
return NULL;
}
/*!
* \internal
* \brief Get meta-data for a resource
*
* \param[in] lrm_state Use meta-data cache from this executor connection
* \param[in] rsc Resource to get meta-data for
* \param[in] from_agent Execute agent if this is true and meta-data not cached
*
* \return Meta-data cache entry for given resource, or NULL if not available
*/
struct ra_metadata_s *
controld_get_rsc_metadata(lrm_state_t *lrm_state, lrmd_rsc_info_t *rsc,
bool from_agent)
{
struct ra_metadata_s *metadata = NULL;
char *metadata_str = NULL;
char *key = NULL;
int rc = pcmk_ok;
CRM_CHECK((lrm_state != NULL) && (rsc != NULL), return NULL);
key = crm_generate_ra_key(rsc->standard, rsc->provider, rsc->type);
if (key != NULL) {
metadata = g_hash_table_lookup(lrm_state->metadata_cache, key);
free(key);
}
if ((metadata != NULL) || !from_agent) {
return metadata;
}
/* For now, we always collect resource agent meta-data via a local,
* synchronous, direct execution of the agent. This has multiple issues:
* the executor should execute agents, not the controller; meta-data for
* Pacemaker Remote nodes should be collected on those nodes, not
* locally; and the meta-data call shouldn't eat into the timeout of the
* real action being performed.
*
* These issues are planned to be addressed by having the scheduler
* schedule a meta-data cache check at the beginning of each transition.
* Once that is working, this block will only be a fallback in case the
* initial collection fails.
*/
rc = lrm_state_get_metadata(lrm_state, rsc->standard, rsc->provider,
rsc->type, &metadata_str, 0);
if (rc != pcmk_ok) {
crm_warn("Failed to get metadata for %s (%s:%s:%s): %s",
rsc->id, rsc->standard, rsc->provider, rsc->type,
pcmk_strerror(rc));
return NULL;
}
metadata = metadata_cache_update(lrm_state->metadata_cache, rsc,
metadata_str);
free(metadata_str);
if (metadata == NULL) {
crm_warn("Failed to update metadata for %s (%s:%s:%s)",
rsc->id, rsc->standard, rsc->provider, rsc->type);
}
return metadata;
}

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