diff --git a/daemons/attrd/attrd_ipc.c b/daemons/attrd/attrd_ipc.c index 7909e12ff8..0a2688e44d 100644 --- a/daemons/attrd/attrd_ipc.c +++ b/daemons/attrd/attrd_ipc.c @@ -1,624 +1,624 @@ /* * Copyright 2004-2024 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include "pacemaker-attrd.h" static qb_ipcs_service_t *ipcs = NULL; /*! * \internal * \brief Build the XML reply to a client query * * \param[in] attr Name of requested attribute * \param[in] host Name of requested host (or NULL for all hosts) * * \return New XML reply * \note Caller is responsible for freeing the resulting XML */ static xmlNode *build_query_reply(const char *attr, const char *host) { xmlNode *reply = pcmk__xe_create(NULL, __func__); attribute_t *a; crm_xml_add(reply, PCMK__XA_T, PCMK__VALUE_ATTRD); crm_xml_add(reply, PCMK__XA_SUBT, PCMK__ATTRD_CMD_QUERY); crm_xml_add(reply, PCMK__XA_ATTR_VERSION, ATTRD_PROTOCOL_VERSION); /* If desired attribute exists, add its value(s) to the reply */ a = g_hash_table_lookup(attributes, attr); if (a) { attribute_value_t *v; xmlNode *host_value; crm_xml_add(reply, PCMK__XA_ATTR_NAME, attr); /* Allow caller to use "localhost" to refer to local node */ if (pcmk__str_eq(host, "localhost", pcmk__str_casei)) { host = attrd_cluster->uname; crm_trace("Mapped localhost to %s", host); } /* If a specific node was requested, add its value */ if (host) { v = g_hash_table_lookup(a->values, host); host_value = pcmk__xe_create(reply, PCMK_XE_NODE); pcmk__xe_add_node(host_value, host, 0); crm_xml_add(host_value, PCMK__XA_ATTR_VALUE, (v? v->current : NULL)); /* Otherwise, add all nodes' values */ } else { GHashTableIter iter; g_hash_table_iter_init(&iter, a->values); while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &v)) { host_value = pcmk__xe_create(reply, PCMK_XE_NODE); pcmk__xe_add_node(host_value, v->nodename, 0); crm_xml_add(host_value, PCMK__XA_ATTR_VALUE, v->current); } } } return reply; } xmlNode * attrd_client_clear_failure(pcmk__request_t *request) { xmlNode *xml = request->xml; const char *rsc, *op, *interval_spec; if (minimum_protocol_version >= 2) { /* Propagate to all peers (including ourselves). * This ends up at attrd_peer_message(). */ attrd_send_message(NULL, xml, false); pcmk__set_result(&request->result, CRM_EX_OK, PCMK_EXEC_DONE, NULL); return NULL; } rsc = crm_element_value(xml, PCMK__XA_ATTR_RESOURCE); op = crm_element_value(xml, PCMK__XA_ATTR_CLEAR_OPERATION); interval_spec = crm_element_value(xml, PCMK__XA_ATTR_CLEAR_INTERVAL); /* Map this to an update */ crm_xml_add(xml, PCMK_XA_TASK, PCMK__ATTRD_CMD_UPDATE); /* Add regular expression matching desired attributes */ if (rsc) { char *pattern; if (op == NULL) { pattern = crm_strdup_printf(ATTRD_RE_CLEAR_ONE, rsc); } else { guint interval_ms = 0U; pcmk_parse_interval_spec(interval_spec, &interval_ms); pattern = crm_strdup_printf(ATTRD_RE_CLEAR_OP, rsc, op, interval_ms); } crm_xml_add(xml, PCMK__XA_ATTR_REGEX, pattern); free(pattern); } else { crm_xml_add(xml, PCMK__XA_ATTR_REGEX, ATTRD_RE_CLEAR_ALL); } /* Make sure attribute and value are not set, so we delete via regex */ pcmk__xe_remove_attr(xml, PCMK__XA_ATTR_NAME); pcmk__xe_remove_attr(xml, PCMK__XA_ATTR_VALUE); return attrd_client_update(request); } xmlNode * attrd_client_peer_remove(pcmk__request_t *request) { xmlNode *xml = request->xml; // Host and ID are not used in combination, rather host has precedence const char *host = crm_element_value(xml, PCMK__XA_ATTR_HOST); char *host_alloc = NULL; attrd_send_ack(request->ipc_client, request->ipc_id, request->ipc_flags); if (host == NULL) { int nodeid = 0; crm_element_value_int(xml, PCMK__XA_ATTR_HOST_ID, &nodeid); if (nodeid > 0) { crm_node_t *node = NULL; char *host_alloc = NULL; node = pcmk__search_node_caches(nodeid, NULL, pcmk__node_search_cluster_member); if (node && node->uname) { // Use cached name if available host = node->uname; } else { // Otherwise ask cluster layer - host_alloc = get_node_name(nodeid); + host_alloc = pcmk__cluster_node_name(nodeid); host = host_alloc; } pcmk__xe_add_node(xml, host, 0); } } if (host) { crm_info("Client %s is requesting all values for %s be removed", pcmk__client_name(request->ipc_client), host); attrd_send_message(NULL, xml, false); /* ends up at attrd_peer_message() */ free(host_alloc); } else { crm_info("Ignoring request by client %s to remove all peer values without specifying peer", pcmk__client_name(request->ipc_client)); } pcmk__set_result(&request->result, CRM_EX_OK, PCMK_EXEC_DONE, NULL); return NULL; } xmlNode * attrd_client_query(pcmk__request_t *request) { xmlNode *query = request->xml; xmlNode *reply = NULL; const char *attr = NULL; crm_debug("Query arrived from %s", pcmk__client_name(request->ipc_client)); /* Request must specify attribute name to query */ attr = crm_element_value(query, PCMK__XA_ATTR_NAME); if (attr == NULL) { pcmk__format_result(&request->result, CRM_EX_ERROR, PCMK_EXEC_ERROR, "Ignoring malformed query from %s (no attribute name given)", pcmk__client_name(request->ipc_client)); return NULL; } /* Build the XML reply */ reply = build_query_reply(attr, crm_element_value(query, PCMK__XA_ATTR_HOST)); if (reply == NULL) { pcmk__format_result(&request->result, CRM_EX_ERROR, PCMK_EXEC_ERROR, "Could not respond to query from %s: could not create XML reply", pcmk__client_name(request->ipc_client)); return NULL; } else { pcmk__set_result(&request->result, CRM_EX_OK, PCMK_EXEC_DONE, NULL); } request->ipc_client->request_id = 0; return reply; } xmlNode * attrd_client_refresh(pcmk__request_t *request) { crm_info("Updating all attributes"); attrd_send_ack(request->ipc_client, request->ipc_id, request->ipc_flags); attrd_write_attributes(attrd_write_all|attrd_write_no_delay); pcmk__set_result(&request->result, CRM_EX_OK, PCMK_EXEC_DONE, NULL); return NULL; } static void handle_missing_host(xmlNode *xml) { const char *host = crm_element_value(xml, PCMK__XA_ATTR_HOST); if (host == NULL) { crm_trace("Inferring host"); pcmk__xe_add_node(xml, attrd_cluster->uname, attrd_cluster->nodeid); } } /* Convert a single IPC message with a regex into one with multiple children, one * for each regex match. */ static int expand_regexes(xmlNode *xml, const char *attr, const char *value, const char *regex) { if (attr == NULL && regex) { bool matched = false; GHashTableIter aIter; regex_t r_patt; crm_debug("Setting %s to %s", regex, value); if (regcomp(&r_patt, regex, REG_EXTENDED|REG_NOSUB)) { return EINVAL; } 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) { xmlNode *child = pcmk__xe_create(xml, PCMK_XE_OP); crm_trace("Matched %s with %s", attr, regex); matched = true; /* Copy all the non-conflicting attributes from the parent over, * but remove the regex and replace it with the name. */ pcmk__xe_copy_attrs(child, xml, pcmk__xaf_no_overwrite); pcmk__xe_remove_attr(child, PCMK__XA_ATTR_REGEX); crm_xml_add(child, PCMK__XA_ATTR_NAME, attr); } } regfree(&r_patt); /* Return a code if we never matched anything. This should not be treated * as an error. It indicates there was a regex, and it was a valid regex, * but simply did not match anything and the caller should not continue * doing any regex-related processing. */ if (!matched) { return pcmk_rc_op_unsatisfied; } } else if (attr == NULL) { return pcmk_rc_bad_nvpair; } return pcmk_rc_ok; } static int handle_regexes(pcmk__request_t *request) { xmlNode *xml = request->xml; int rc = pcmk_rc_ok; const char *attr = crm_element_value(xml, PCMK__XA_ATTR_NAME); const char *value = crm_element_value(xml, PCMK__XA_ATTR_VALUE); const char *regex = crm_element_value(xml, PCMK__XA_ATTR_REGEX); rc = expand_regexes(xml, attr, value, regex); if (rc == EINVAL) { pcmk__format_result(&request->result, CRM_EX_ERROR, PCMK_EXEC_ERROR, "Bad regex '%s' for update from client %s", regex, pcmk__client_name(request->ipc_client)); } else if (rc == pcmk_rc_bad_nvpair) { crm_err("Update request did not specify attribute or regular expression"); pcmk__format_result(&request->result, CRM_EX_ERROR, PCMK_EXEC_ERROR, "Client %s update request did not specify attribute or regular expression", pcmk__client_name(request->ipc_client)); } return rc; } static int handle_value_expansion(const char **value, xmlNode *xml, const char *op, const char *attr) { attribute_t *a = g_hash_table_lookup(attributes, attr); if (a == NULL && pcmk__str_eq(op, PCMK__ATTRD_CMD_UPDATE_DELAY, pcmk__str_none)) { return EINVAL; } if (*value && attrd_value_needs_expansion(*value)) { int int_value; attribute_value_t *v = NULL; if (a) { const char *host = crm_element_value(xml, PCMK__XA_ATTR_HOST); v = g_hash_table_lookup(a->values, host); } int_value = attrd_expand_value(*value, (v? v->current : NULL)); crm_info("Expanded %s=%s to %d", attr, *value, int_value); crm_xml_add_int(xml, PCMK__XA_ATTR_VALUE, int_value); /* Replacing the value frees the previous memory, so re-query it */ *value = crm_element_value(xml, PCMK__XA_ATTR_VALUE); } return pcmk_rc_ok; } static void send_update_msg_to_cluster(pcmk__request_t *request, xmlNode *xml) { if (pcmk__str_eq(attrd_request_sync_point(xml), PCMK__VALUE_CLUSTER, pcmk__str_none)) { /* The client is waiting on the cluster-wide sync point. In this case, * the response ACK is not sent until this attrd broadcasts the update * and receives its own confirmation back from all peers. */ attrd_expect_confirmations(request, attrd_cluster_sync_point_update); attrd_send_message(NULL, xml, true); /* ends up at attrd_peer_message() */ } else { /* The client is either waiting on the local sync point or was not * waiting on any sync point at all. For the local sync point, the * response ACK is sent in attrd_peer_update. For clients not * waiting on any sync point, the response ACK is sent in * handle_update_request immediately before this function was called. */ attrd_send_message(NULL, xml, false); /* ends up at attrd_peer_message() */ } } static int send_child_update(xmlNode *child, void *data) { pcmk__request_t *request = (pcmk__request_t *) data; /* Calling pcmk__set_result is handled by one of these calls to * attrd_client_update, so no need to do it again here. */ request->xml = child; attrd_client_update(request); return pcmk_rc_ok; } xmlNode * attrd_client_update(pcmk__request_t *request) { xmlNode *xml = NULL; const char *attr, *value, *regex; CRM_CHECK((request != NULL) && (request->xml != NULL), return NULL); xml = request->xml; /* If the message has children, that means it is a message from a newer * client that supports sending multiple operations at a time. There are * two ways we can handle that. */ if (xml->children != NULL) { if (ATTRD_SUPPORTS_MULTI_MESSAGE(minimum_protocol_version)) { /* First, if all peers support a certain protocol version, we can * just broadcast the big message and they'll handle it. However, * we also need to apply all the transformations in this function * to the children since they don't happen anywhere else. */ for (xmlNode *child = pcmk__xe_first_child(xml, PCMK_XE_OP, NULL, NULL); child != NULL; child = pcmk__xe_next_same(child)) { attr = crm_element_value(child, PCMK__XA_ATTR_NAME); value = crm_element_value(child, PCMK__XA_ATTR_VALUE); handle_missing_host(child); if (handle_value_expansion(&value, child, request->op, attr) == EINVAL) { pcmk__format_result(&request->result, CRM_EX_NOSUCH, PCMK_EXEC_ERROR, "Attribute %s does not exist", attr); return NULL; } } send_update_msg_to_cluster(request, xml); pcmk__set_result(&request->result, CRM_EX_OK, PCMK_EXEC_DONE, NULL); } else { /* Save the original xml node pointer so it can be restored after iterating * over all the children. */ xmlNode *orig_xml = request->xml; /* Second, if they do not support that protocol version, split it * up into individual messages and call attrd_client_update on * each one. */ pcmk__xe_foreach_child(xml, PCMK_XE_OP, send_child_update, request); request->xml = orig_xml; } return NULL; } attr = crm_element_value(xml, PCMK__XA_ATTR_NAME); value = crm_element_value(xml, PCMK__XA_ATTR_VALUE); regex = crm_element_value(xml, PCMK__XA_ATTR_REGEX); if (handle_regexes(request) != pcmk_rc_ok) { /* Error handling was already dealt with in handle_regexes, so just return. */ return NULL; } else if (regex) { /* Recursively call attrd_client_update on the new message with regexes * expanded. If supported by the attribute daemon, this means that all * matches can also be handled atomically. */ return attrd_client_update(request); } handle_missing_host(xml); if (handle_value_expansion(&value, xml, request->op, attr) == EINVAL) { pcmk__format_result(&request->result, CRM_EX_NOSUCH, PCMK_EXEC_ERROR, "Attribute %s does not exist", attr); return NULL; } crm_debug("Broadcasting %s[%s]=%s%s", attr, crm_element_value(xml, PCMK__XA_ATTR_HOST), value, (attrd_election_won()? " (writer)" : "")); send_update_msg_to_cluster(request, xml); pcmk__set_result(&request->result, CRM_EX_OK, PCMK_EXEC_DONE, NULL); return NULL; } /*! * \internal * \brief Accept a new client IPC connection * * \param[in,out] c New connection * \param[in] uid Client user id * \param[in] gid Client group id * * \return pcmk_ok on success, -errno otherwise */ static int32_t attrd_ipc_accept(qb_ipcs_connection_t *c, uid_t uid, gid_t gid) { crm_trace("New client connection %p", c); if (attrd_shutting_down(false)) { crm_info("Ignoring new connection from pid %d during shutdown", pcmk__client_pid(c)); return -ECONNREFUSED; } if (pcmk__new_client(c, uid, gid) == NULL) { return -ENOMEM; } return pcmk_ok; } /*! * \internal * \brief Destroy a client IPC connection * * \param[in] c Connection to destroy * * \return FALSE (i.e. do not re-run this callback) */ static int32_t attrd_ipc_closed(qb_ipcs_connection_t *c) { pcmk__client_t *client = pcmk__find_client(c); if (client == NULL) { crm_trace("Ignoring request to clean up unknown connection %p", c); } else { crm_trace("Cleaning up closed client connection %p", c); /* Remove the client from the sync point waitlist if it's present. */ attrd_remove_client_from_waitlist(client); /* And no longer wait for confirmations from any peers. */ attrd_do_not_wait_for_client(client); pcmk__free_client(client); } return FALSE; } /*! * \internal * \brief Destroy a client IPC connection * * \param[in,out] c Connection to destroy * * \note We handle a destroyed connection the same as a closed one, * but we need a separate handler because the return type is different. */ static void attrd_ipc_destroy(qb_ipcs_connection_t *c) { crm_trace("Destroying client connection %p", c); attrd_ipc_closed(c); } static int32_t attrd_ipc_dispatch(qb_ipcs_connection_t * c, void *data, size_t size) { uint32_t id = 0; uint32_t flags = 0; pcmk__client_t *client = pcmk__find_client(c); xmlNode *xml = NULL; // Sanity-check, and parse XML from IPC data CRM_CHECK((c != NULL) && (client != NULL), return 0); if (data == NULL) { crm_debug("No IPC data from PID %d", pcmk__client_pid(c)); return 0; } xml = pcmk__client_data2xml(client, data, &id, &flags); if (xml == NULL) { crm_debug("Unrecognizable IPC data from PID %d", pcmk__client_pid(c)); pcmk__ipc_send_ack(client, id, flags, PCMK__XE_ACK, NULL, CRM_EX_PROTOCOL); return 0; } else { pcmk__request_t request = { .ipc_client = client, .ipc_id = id, .ipc_flags = flags, .peer = NULL, .xml = xml, .call_options = 0, .result = PCMK__UNKNOWN_RESULT, }; CRM_ASSERT(client->user != NULL); pcmk__update_acl_user(xml, PCMK__XA_ATTR_USER, client->user); request.op = crm_element_value_copy(request.xml, PCMK_XA_TASK); CRM_CHECK(request.op != NULL, return 0); attrd_handle_request(&request); pcmk__reset_request(&request); } free_xml(xml); return 0; } static struct qb_ipcs_service_handlers ipc_callbacks = { .connection_accept = attrd_ipc_accept, .connection_created = NULL, .msg_process = attrd_ipc_dispatch, .connection_closed = attrd_ipc_closed, .connection_destroyed = attrd_ipc_destroy }; void attrd_ipc_fini(void) { if (ipcs != NULL) { pcmk__drop_all_clients(ipcs); qb_ipcs_destroy(ipcs); ipcs = NULL; } } /*! * \internal * \brief Set up attrd IPC communication */ void attrd_init_ipc(void) { pcmk__serve_attrd_ipc(&ipcs, &ipc_callbacks); } diff --git a/include/crm/cluster/internal.h b/include/crm/cluster/internal.h index 950bb8a648..cca2bb8bfe 100644 --- a/include/crm/cluster/internal.h +++ b/include/crm/cluster/internal.h @@ -1,191 +1,192 @@ /* * Copyright 2004-2024 the Pacemaker project contributors * * The version control history for this file may have further details. * * This source code is licensed under the GNU Lesser General Public License * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY. */ #ifndef PCMK__CRM_CLUSTER_INTERNAL__H # define PCMK__CRM_CLUSTER_INTERNAL__H # include # include // uint32_t, uint64_t # include // gboolean # include enum crm_proc_flag { /* @COMPAT When crm_node_t:processes is made internal, we can merge this * into node flags or turn it into a boolean. Until then, in theory * something could depend on these particular numeric values. */ crm_proc_none = 0x00000001, // Cluster layers crm_proc_cpg = 0x04000000, }; // Used with node cache search functions enum pcmk__node_search_flags { //! Does not affect search pcmk__node_search_none = 0, //! Search for cluster nodes from membership cache pcmk__node_search_cluster_member = (1 << 0), //! Search for remote nodes pcmk__node_search_remote = (1 << 1), //! Search for cluster member nodes and remote nodes pcmk__node_search_any = pcmk__node_search_cluster_member |pcmk__node_search_remote, /* @COMPAT The values before this must stay the same until we can drop * support for enum crm_get_peer_flags */ //! Search for cluster nodes from CIB (as of last cache refresh) pcmk__node_search_cluster_cib = (1 << 2), }; /*! * \internal * \brief Return the process bit corresponding to the current cluster stack * * \return Process flag if detectable, otherwise 0 */ static inline uint32_t crm_get_cluster_proc(void) { switch (pcmk_get_cluster_layer()) { case pcmk_cluster_layer_corosync: return crm_proc_cpg; default: break; } return crm_proc_none; } /*! * \internal * \brief Get log-friendly string description of a Corosync return code * * \param[in] error Corosync return code * * \return Log-friendly string description corresponding to \p error */ static inline const char * pcmk__cs_err_str(int error) { # if SUPPORT_COROSYNC switch (error) { case CS_OK: return "OK"; case CS_ERR_LIBRARY: return "Library error"; case CS_ERR_VERSION: return "Version error"; case CS_ERR_INIT: return "Initialization error"; case CS_ERR_TIMEOUT: return "Timeout"; case CS_ERR_TRY_AGAIN: return "Try again"; case CS_ERR_INVALID_PARAM: return "Invalid parameter"; case CS_ERR_NO_MEMORY: return "No memory"; case CS_ERR_BAD_HANDLE: return "Bad handle"; case CS_ERR_BUSY: return "Busy"; case CS_ERR_ACCESS: return "Access error"; case CS_ERR_NOT_EXIST: return "Doesn't exist"; case CS_ERR_NAME_TOO_LONG: return "Name too long"; case CS_ERR_EXIST: return "Exists"; case CS_ERR_NO_SPACE: return "No space"; case CS_ERR_INTERRUPT: return "Interrupt"; case CS_ERR_NAME_NOT_FOUND: return "Name not found"; case CS_ERR_NO_RESOURCES: return "No resources"; case CS_ERR_NOT_SUPPORTED: return "Not supported"; case CS_ERR_BAD_OPERATION: return "Bad operation"; case CS_ERR_FAILED_OPERATION: return "Failed operation"; case CS_ERR_MESSAGE_ERROR: return "Message error"; case CS_ERR_QUEUE_FULL: return "Queue full"; case CS_ERR_QUEUE_NOT_AVAILABLE: return "Queue not available"; case CS_ERR_BAD_FLAGS: return "Bad flags"; case CS_ERR_TOO_BIG: return "Too big"; case CS_ERR_NO_SECTIONS: return "No sections"; } # endif return "Corosync error"; } # if SUPPORT_COROSYNC #if 0 /* This is the new way to do it, but we still support all Corosync 2 versions, * and this isn't always available. A better alternative here would be to check * for support in the configure script and enable this conditionally. */ #define pcmk__init_cmap(handle) cmap_initialize_map((handle), CMAP_MAP_ICMAP) #else #define pcmk__init_cmap(handle) cmap_initialize(handle) #endif char *pcmk__corosync_cluster_name(void); bool pcmk__corosync_add_nodes(xmlNode *xml_parent); void pcmk__cpg_confchg_cb(cpg_handle_t handle, const struct cpg_name *group_name, const struct cpg_address *member_list, size_t member_list_entries, const struct cpg_address *left_list, size_t left_list_entries, const struct cpg_address *joined_list, size_t joined_list_entries); char *pcmk__cpg_message_data(cpg_handle_t handle, uint32_t sender_id, uint32_t pid, void *content, uint32_t *kind, const char **from); # endif const char *pcmk__cluster_node_uuid(crm_node_t *node); +char *pcmk__cluster_node_name(uint32_t nodeid); crm_node_t *crm_update_peer_proc(const char *source, crm_node_t * peer, uint32_t flag, const char *status); crm_node_t *pcmk__update_peer_state(const char *source, crm_node_t *node, const char *state, uint64_t membership); void pcmk__update_peer_expected(const char *source, crm_node_t *node, const char *expected); void pcmk__reap_unseen_nodes(uint64_t ring_id); void pcmk__corosync_quorum_connect(gboolean (*dispatch)(unsigned long long, gboolean), void (*destroy) (gpointer)); enum crm_ais_msg_types pcmk__cluster_parse_msg_type(const char *text); bool pcmk__cluster_send_message(const crm_node_t *node, enum crm_ais_msg_types service, const xmlNode *data); // Membership void pcmk__cluster_init_node_caches(void); void pcmk__cluster_destroy_node_caches(void); bool pcmk__cluster_is_node_active(const crm_node_t *node); unsigned int pcmk__cluster_num_active_nodes(void); unsigned int pcmk__cluster_num_remote_nodes(void); crm_node_t *pcmk__cluster_lookup_remote_node(const char *node_name); void pcmk__cluster_forget_cluster_node(uint32_t id, const char *node_name); void pcmk__cluster_forget_remote_node(const char *node_name); crm_node_t *pcmk__search_node_caches(unsigned int id, const char *uname, uint32_t flags); crm_node_t *pcmk__search_cluster_node_cache(unsigned int id, const char *uname, const char *uuid); void pcmk__purge_node_from_cache(const char *node_name, uint32_t node_id); void pcmk__refresh_node_caches_from_cib(xmlNode *cib); crm_node_t *pcmk__get_node(unsigned int id, const char *uname, const char *uuid, uint32_t flags); #endif // PCMK__CRM_CLUSTER_INTERNAL__H diff --git a/lib/cluster/cluster.c b/lib/cluster/cluster.c index 1c4706b966..345b902171 100644 --- a/lib/cluster/cluster.c +++ b/lib/cluster/cluster.c @@ -1,535 +1,561 @@ /* * Copyright 2004-2024 the Pacemaker project contributors * * The version control history for this file may have further details. * * This source code is licensed under the GNU Lesser General Public License * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY. */ #include #include +#include // PRIu32 #include #include #include #include #include #include #include #include #include // gboolean #include #include #include #include #include "crmcluster_private.h" CRM_TRACE_INIT_DATA(cluster); /*! * \internal * \brief Get the message type equivalent of a string * * \param[in] text String of message type * * \return Message type equivalent of \p text */ enum crm_ais_msg_types pcmk__cluster_parse_msg_type(const char *text) { int rc = 0; int type = crm_msg_none; CRM_CHECK(text != NULL, return crm_msg_none); text = pcmk__message_name(text); if (pcmk__str_eq(text, "ais", pcmk__str_none)) { return crm_msg_ais; } if (pcmk__str_eq(text, CRM_SYSTEM_CIB, pcmk__str_none)) { return crm_msg_cib; } if (pcmk__str_any_of(text, CRM_SYSTEM_CRMD, CRM_SYSTEM_DC, NULL)) { return crm_msg_crmd; } if (pcmk__str_eq(text, CRM_SYSTEM_TENGINE, pcmk__str_none)) { return crm_msg_te; } if (pcmk__str_eq(text, CRM_SYSTEM_PENGINE, pcmk__str_none)) { return crm_msg_pe; } if (pcmk__str_eq(text, CRM_SYSTEM_LRMD, pcmk__str_none)) { return crm_msg_lrmd; } if (pcmk__str_eq(text, CRM_SYSTEM_STONITHD, pcmk__str_none)) { return crm_msg_stonithd; } if (pcmk__str_eq(text, "stonith-ng", pcmk__str_none)) { return crm_msg_stonith_ng; } if (pcmk__str_eq(text, "attrd", pcmk__str_none)) { return crm_msg_attrd; } /* This will normally be a transient client rather than a cluster daemon. * Set the type to the pid of the client. * * @TODO Check whether this is necessary and correct. */ rc = sscanf(text, "%d", &type); if ((rc != 1) || (type <= crm_msg_stonith_ng)) { // Ensure it's sane; don't falsely return a standard message type type = crm_msg_none; } return type; } /*! * \internal * \brief Get a node's cluster-layer UUID, setting it if not already set * * \param[in,out] node Node to check * * \return Cluster-layer node UUID of \p node, or \c NULL if unknown */ const char * pcmk__cluster_node_uuid(crm_node_t *node) { const enum pcmk_cluster_layer cluster_layer = pcmk_get_cluster_layer(); if (node == NULL) { return NULL; } if (node->uuid != NULL) { return node->uuid; } switch (cluster_layer) { #if SUPPORT_COROSYNC case pcmk_cluster_layer_corosync: node->uuid = pcmk__corosync_uuid(node); return node->uuid; #endif // SUPPORT_COROSYNC default: crm_err("Unsupported cluster layer %s", pcmk_cluster_layer_text(cluster_layer)); return NULL; } } /*! * \internal * \brief Connect to the cluster layer * * \param[in,out] cluster Initialized cluster object to connect * * \return Standard Pacemaker return code */ int pcmk_cluster_connect(pcmk_cluster_t *cluster) { const enum pcmk_cluster_layer cluster_layer = pcmk_get_cluster_layer(); const char *cluster_layer_s = pcmk_cluster_layer_text(cluster_layer); crm_notice("Connecting to %s cluster layer", cluster_layer_s); switch (cluster_layer) { #if SUPPORT_COROSYNC case pcmk_cluster_layer_corosync: return pcmk__corosync_connect(cluster); #endif // SUPPORT_COROSYNC default: break; } crm_err("Failed to connect to unsupported cluster layer %s", cluster_layer_s); return EPROTONOSUPPORT; } /*! * \brief Disconnect from the cluster layer * * \param[in,out] cluster Cluster object to disconnect * * \return Standard Pacemaker return code */ int pcmk_cluster_disconnect(pcmk_cluster_t *cluster) { const enum pcmk_cluster_layer cluster_layer = pcmk_get_cluster_layer(); const char *cluster_layer_s = pcmk_cluster_layer_text(cluster_layer); crm_info("Disconnecting from %s cluster layer", cluster_layer_s); switch (cluster_layer) { #if SUPPORT_COROSYNC case pcmk_cluster_layer_corosync: pcmk__corosync_disconnect(cluster); pcmk__cluster_destroy_node_caches(); return pcmk_rc_ok; #endif // SUPPORT_COROSYNC default: break; } crm_err("Failed to disconnect from unsupported cluster layer %s", cluster_layer_s); return EPROTONOSUPPORT; } /*! * \brief Allocate a new \p pcmk_cluster_t object * * \return A newly allocated \p pcmk_cluster_t object (guaranteed not \c NULL) * \note The caller is responsible for freeing the return value using * \p pcmk_cluster_free(). */ pcmk_cluster_t * pcmk_cluster_new(void) { return (pcmk_cluster_t *) pcmk__assert_alloc(1, sizeof(pcmk_cluster_t)); } /*! * \brief Free a \p pcmk_cluster_t object and its dynamically allocated members * * \param[in,out] cluster Cluster object to free */ void pcmk_cluster_free(pcmk_cluster_t *cluster) { if (cluster == NULL) { return; } free(cluster->uuid); free(cluster->uname); free(cluster); } /*! * \brief Set the destroy function for a cluster object * * \param[in,out] cluster Cluster object * \param[in] fn Destroy function to set * * \return Standard Pacemaker return code */ int pcmk_cluster_set_destroy_fn(pcmk_cluster_t *cluster, void (*fn)(gpointer)) { if (cluster == NULL) { return EINVAL; } cluster->destroy = fn; return pcmk_rc_ok; } /*! * \internal * \brief Send an XML message via the cluster messaging layer * * \param[in] node Cluster node to send message to * \param[in] service Message type to use in message host info * \param[in] data XML message to send * * \return \c true on success, or \c false otherwise */ bool pcmk__cluster_send_message(const crm_node_t *node, enum crm_ais_msg_types service, const xmlNode *data) { // @TODO Return standard Pacemaker return code switch (pcmk_get_cluster_layer()) { #if SUPPORT_COROSYNC case pcmk_cluster_layer_corosync: return pcmk__cpg_send_xml(data, node, service); #endif // SUPPORT_COROSYNC default: break; } return false; } /*! - * \brief Get the local node's name + * \internal + * \brief Get the node name corresponding to a cluster-layer node ID * - * \return Local node's name - * \note This will fatally exit if local node name cannot be known. - */ -const char * -get_local_node_name(void) -{ - static char *name = NULL; - - if (name == NULL) { - name = get_node_name(0); - } - return name; -} - -/*! - * \brief Get the node name corresponding to a cluster node ID + * Get the node name from the cluster layer if possible. Otherwise, if for the + * local node, call \c uname() and get the \c nodename member from the + * struct utsname object. * - * \param[in] nodeid Node ID to check (or 0 for local node) + * \param[in] nodeid Node ID to check (or 0 for the local node) * * \return Node name corresponding to \p nodeid - * \note This will fatally exit if \p nodeid is 0 and local node name cannot be - * known. + * + * \note This will fatally exit if \c uname() fails to get the local node name + * or we run out of memory. + * \note The caller is responsible for freeing the return value using \c free(). */ char * -get_node_name(uint32_t nodeid) +pcmk__cluster_node_name(uint32_t nodeid) { - char *name = NULL; const enum pcmk_cluster_layer cluster_layer = pcmk_get_cluster_layer(); const char *cluster_layer_s = pcmk_cluster_layer_text(cluster_layer); switch (cluster_layer) { - case pcmk_cluster_layer_corosync: #if SUPPORT_COROSYNC - name = pcmk__corosync_name(0, nodeid); + case pcmk_cluster_layer_corosync: + return pcmk__corosync_name(0, nodeid); +#else break; #endif // SUPPORT_COROSYNC default: - crm_err("Unknown cluster layer: %s (%d)", - cluster_layer_s, cluster_layer); + crm_err("Unsupported cluster layer: %s", cluster_layer_s); + break; } - if ((name == NULL) && (nodeid == 0)) { + if (nodeid == 0) { + char *name = NULL; + + crm_notice("Could not get local node name from %s cluster layer, " + "defaulting to local hostname", + cluster_layer_s); + name = pcmk_hostname(); if (name == NULL) { // @TODO Maybe let the caller decide what to do - crm_err("Could not obtain the local %s node name", cluster_layer_s); + crm_err("Failed to get the local hostname"); crm_exit(CRM_EX_FATAL); } - crm_notice("Defaulting to uname -n for the local %s node name", - cluster_layer_s); + return name; } + crm_notice("Could not obtain a node name for node with " + PCMK_XA_ID "=" PRIu32, + nodeid); + return NULL; +} + +/*! + * \brief Get the local node's name + * + * \return Local node's name + * \note This will fatally exit if local node name cannot be known. + */ +const char * +get_local_node_name(void) +{ + static char *name = NULL; + if (name == NULL) { - crm_notice("Could not obtain a node name for %s node with " - PCMK_XA_ID " %u", - cluster_layer_s, nodeid); + name = pcmk__cluster_node_name(0); } return name; } +/*! + * \brief Get the node name corresponding to a cluster node ID + * + * \param[in] nodeid Node ID to check (or 0 for local node) + * + * \return Node name corresponding to \p nodeid + * \note This will fatally exit if \p nodeid is 0 and local node name cannot be + * known. + */ +char * +get_node_name(uint32_t nodeid) +{ + return pcmk__cluster_node_name(nodeid); +} + /*! * \brief Get the node name corresponding to a node UUID * * \param[in] uuid UUID of desired node * * \return name of desired node * * \note This relies on the remote peer cache being populated with all * remote nodes in the cluster, so callers should maintain that cache. */ const char * crm_peer_uname(const char *uuid) { GHashTableIter iter; crm_node_t *node = NULL; CRM_CHECK(uuid != NULL, return NULL); /* remote nodes have the same uname and uuid */ if (g_hash_table_lookup(crm_remote_peer_cache, uuid)) { return uuid; } /* avoid blocking calls where possible */ g_hash_table_iter_init(&iter, crm_peer_cache); while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &node)) { if (pcmk__str_eq(node->uuid, uuid, pcmk__str_casei)) { if (node->uname != NULL) { return node->uname; } break; } } node = NULL; if (pcmk_get_cluster_layer() == pcmk_cluster_layer_corosync) { long long id; if ((pcmk__scan_ll(uuid, &id, 0LL) != pcmk_rc_ok) || (id < 1LL) || (id > UINT32_MAX)) { crm_err("Invalid Corosync node ID '%s'", uuid); return NULL; } node = pcmk__search_node_caches((uint32_t) id, NULL, pcmk__node_search_cluster_member); if (node != NULL) { crm_info("Setting uuid for node %s[%u] to %s", node->uname, node->id, uuid); node->uuid = strdup(uuid); return node->uname; } return NULL; } return NULL; } /*! * \brief Get a log-friendly string equivalent of a cluster layer * * \param[in] layer Cluster layer * * \return Log-friendly string corresponding to \p layer */ const char * pcmk_cluster_layer_text(enum pcmk_cluster_layer layer) { switch (layer) { case pcmk_cluster_layer_corosync: return "corosync"; case pcmk_cluster_layer_unknown: return "unknown"; case pcmk_cluster_layer_invalid: return "invalid"; default: crm_err("Invalid cluster layer: %d", layer); return "invalid"; } } /*! * \brief Get and validate the local cluster layer * * If a cluster layer is not configured via the \c PCMK__ENV_CLUSTER_TYPE local * option, this will try to detect an active cluster from among the supported * cluster layers. * * \return Local cluster layer * * \note This will fatally exit if the configured cluster layer is invalid. */ enum pcmk_cluster_layer pcmk_get_cluster_layer(void) { static enum pcmk_cluster_layer cluster_layer = pcmk_cluster_layer_unknown; const char *cluster = NULL; // Cluster layer is stable once set if (cluster_layer != pcmk_cluster_layer_unknown) { return cluster_layer; } cluster = pcmk__env_option(PCMK__ENV_CLUSTER_TYPE); if (cluster != NULL) { crm_info("Verifying configured cluster layer '%s'", cluster); cluster_layer = pcmk_cluster_layer_invalid; #if SUPPORT_COROSYNC if (pcmk__str_eq(cluster, PCMK_VALUE_COROSYNC, pcmk__str_casei)) { cluster_layer = pcmk_cluster_layer_corosync; } #endif // SUPPORT_COROSYNC if (cluster_layer == pcmk_cluster_layer_invalid) { crm_notice("This installation does not support the '%s' cluster " "infrastructure: terminating", cluster); crm_exit(CRM_EX_FATAL); } crm_info("Assuming an active '%s' cluster", cluster); } else { // Nothing configured, so test supported cluster layers #if SUPPORT_COROSYNC crm_debug("Testing with Corosync"); if (pcmk__corosync_is_active()) { cluster_layer = pcmk_cluster_layer_corosync; } #endif // SUPPORT_COROSYNC if (cluster_layer == pcmk_cluster_layer_unknown) { crm_notice("Could not determine the current cluster layer"); } else { crm_info("Detected an active '%s' cluster", pcmk_cluster_layer_text(cluster_layer)); } } return cluster_layer; } // Deprecated functions kept only for backward API compatibility // LCOV_EXCL_START #include void set_uuid(xmlNode *xml, const char *attr, crm_node_t *node) { crm_xml_add(xml, attr, pcmk__cluster_node_uuid(node)); } gboolean crm_cluster_connect(pcmk_cluster_t *cluster) { return pcmk_cluster_connect(cluster) == pcmk_rc_ok; } void crm_cluster_disconnect(pcmk_cluster_t *cluster) { pcmk_cluster_disconnect(cluster); } const char * name_for_cluster_type(enum cluster_type_e type) { switch (type) { case pcmk_cluster_corosync: return "corosync"; case pcmk_cluster_unknown: return "unknown"; case pcmk_cluster_invalid: return "invalid"; } crm_err("Invalid cluster type: %d", type); return "invalid"; } enum cluster_type_e get_cluster_type(void) { return (enum cluster_type_e) pcmk_get_cluster_layer(); } gboolean is_corosync_cluster(void) { return pcmk_get_cluster_layer() == pcmk_cluster_layer_corosync; } gboolean send_cluster_message(const crm_node_t *node, enum crm_ais_msg_types service, const xmlNode *data, gboolean ordered) { return pcmk__cluster_send_message(node, service, data); } const char * crm_peer_uuid(crm_node_t *peer) { return pcmk__cluster_node_uuid(peer); } // LCOV_EXCL_STOP // End deprecated API diff --git a/lib/cluster/corosync.c b/lib/cluster/corosync.c index b0f6949707..ff4da6035d 100644 --- a/lib/cluster/corosync.c +++ b/lib/cluster/corosync.c @@ -1,825 +1,825 @@ /* * Copyright 2004-2024 the Pacemaker project contributors * * The version control history for this file may have further details. * * This source code is licensed under the GNU Lesser General Public License * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY. */ #include #include #include // PRIu64, PRIx32 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include // PCMK__SPECIAL_PID #include #include #include "crmcluster_private.h" static quorum_handle_t pcmk_quorum_handle = 0; static gboolean (*quorum_app_callback)(unsigned long long seq, gboolean quorate) = NULL; /*! * \internal * \brief Get the Corosync UUID associated with a Pacemaker node * * \param[in] node Pacemaker node * * \return Newly allocated string with node's Corosync UUID, or NULL if unknown * \note It is the caller's responsibility to free the result with free(). */ char * pcmk__corosync_uuid(const crm_node_t *node) { CRM_ASSERT(pcmk_get_cluster_layer() == pcmk_cluster_layer_corosync); if (node != NULL) { if (node->id > 0) { return crm_strdup_printf("%u", node->id); } else { crm_info("Node %s is not yet known by Corosync", node->uname); } } return NULL; } static bool node_name_is_valid(const char *key, const char *name) { int octet; if (name == NULL) { crm_trace("%s is empty", key); return false; } else if (sscanf(name, "%d.%d.%d.%d", &octet, &octet, &octet, &octet) == 4) { crm_trace("%s contains an IPv4 address (%s), ignoring", key, name); return false; } else if (strstr(name, ":") != NULL) { crm_trace("%s contains an IPv6 address (%s), ignoring", key, name); return false; } crm_trace("'%s: %s' is valid", key, name); return true; } /* * \internal * \brief Get Corosync node name corresponding to a node ID * * \param[in] cmap_handle Connection to Corosync CMAP * \param[in] nodeid Node ID to check * * \return Newly allocated string with name or (if no name) IP address * associated with first address assigned to a Corosync node ID (or NULL * if unknown) * \note It is the caller's responsibility to free the result with free(). */ char * pcmk__corosync_name(uint64_t /*cmap_handle_t */ cmap_handle, uint32_t nodeid) { // Originally based on corosync-quorumtool.c:node_name() int lpc = 0; cs_error_t rc = CS_OK; int retries = 0; char *name = NULL; cmap_handle_t local_handle = 0; int fd = -1; uid_t found_uid = 0; gid_t found_gid = 0; pid_t found_pid = 0; int rv; if (nodeid == 0) { nodeid = pcmk__cpg_local_nodeid(0); } if (cmap_handle == 0 && local_handle == 0) { retries = 0; crm_trace("Initializing CMAP connection"); do { rc = pcmk__init_cmap(&local_handle); if (rc != CS_OK) { retries++; crm_debug("API connection setup failed: %s. Retrying in %ds", cs_strerror(rc), retries); sleep(retries); } } while (retries < 5 && rc != CS_OK); if (rc != CS_OK) { crm_warn("Could not connect to Cluster Configuration Database API, error %s", cs_strerror(rc)); local_handle = 0; } } if (cmap_handle == 0) { cmap_handle = local_handle; rc = cmap_fd_get(cmap_handle, &fd); if (rc != CS_OK) { crm_err("Could not obtain the CMAP API connection: %s (%d)", cs_strerror(rc), rc); goto bail; } /* CMAP provider run as root (in given user namespace, anyway)? */ if (!(rv = crm_ipc_is_authentic_process(fd, (uid_t) 0,(gid_t) 0, &found_pid, &found_uid, &found_gid))) { crm_err("CMAP provider is not authentic:" " process %lld (uid: %lld, gid: %lld)", (long long) PCMK__SPECIAL_PID_AS_0(found_pid), (long long) found_uid, (long long) found_gid); goto bail; } else if (rv < 0) { crm_err("Could not verify authenticity of CMAP provider: %s (%d)", strerror(-rv), -rv); goto bail; } } while (name == NULL && cmap_handle != 0) { uint32_t id = 0; char *key = NULL; key = crm_strdup_printf("nodelist.node.%d.nodeid", lpc); rc = cmap_get_uint32(cmap_handle, key, &id); crm_trace("Checking %u vs %u from %s", nodeid, id, key); free(key); if (rc != CS_OK) { break; } if (nodeid == id) { crm_trace("Searching for node name for %u in nodelist.node.%d %s", nodeid, lpc, pcmk__s(name, "")); if (name == NULL) { key = crm_strdup_printf("nodelist.node.%d.name", lpc); cmap_get_string(cmap_handle, key, &name); crm_trace("%s = %s", key, pcmk__s(name, "")); free(key); } if (name == NULL) { key = crm_strdup_printf("nodelist.node.%d.ring0_addr", lpc); cmap_get_string(cmap_handle, key, &name); crm_trace("%s = %s", key, pcmk__s(name, "")); if (!node_name_is_valid(key, name)) { free(name); name = NULL; } free(key); } break; } lpc++; } bail: if(local_handle) { cmap_finalize(local_handle); } if (name == NULL) { crm_info("Unable to get node name for nodeid %u", nodeid); } return name; } /*! * \internal * \brief Disconnect from Corosync cluster * * \param[in,out] cluster Cluster object to disconnect */ void pcmk__corosync_disconnect(pcmk_cluster_t *cluster) { pcmk__cpg_disconnect(cluster); if (pcmk_quorum_handle != 0) { quorum_finalize(pcmk_quorum_handle); pcmk_quorum_handle = 0; } crm_notice("Disconnected from Corosync"); } /*! * \internal * \brief Dispatch function for quorum connection file descriptor * * \param[in] user_data Ignored * * \return 0 on success, -1 on error (per mainloop_io_t interface) */ static int quorum_dispatch_cb(gpointer user_data) { int rc = quorum_dispatch(pcmk_quorum_handle, CS_DISPATCH_ALL); if (rc < 0) { crm_err("Connection to the Quorum API failed: %d", rc); quorum_finalize(pcmk_quorum_handle); pcmk_quorum_handle = 0; return -1; } return 0; } /*! * \internal * \brief Notification callback for Corosync quorum connection * * \param[in] handle Corosync quorum connection * \param[in] quorate Whether cluster is quorate * \param[in] ring_id Corosync ring ID * \param[in] view_list_entries Number of entries in \p view_list * \param[in] view_list Corosync node IDs in membership */ static void quorum_notification_cb(quorum_handle_t handle, uint32_t quorate, uint64_t ring_id, uint32_t view_list_entries, uint32_t *view_list) { int i; GHashTableIter iter; crm_node_t *node = NULL; static gboolean init_phase = TRUE; if (quorate != crm_have_quorum) { if (quorate) { crm_notice("Quorum acquired " CRM_XS " membership=%" PRIu64 " members=%lu", ring_id, (long unsigned int)view_list_entries); } else { crm_warn("Quorum lost " CRM_XS " membership=%" PRIu64 " members=%lu", ring_id, (long unsigned int)view_list_entries); } crm_have_quorum = quorate; } else { crm_info("Quorum %s " CRM_XS " membership=%" PRIu64 " members=%lu", (quorate? "retained" : "still lost"), ring_id, (long unsigned int)view_list_entries); } if (view_list_entries == 0 && init_phase) { crm_info("Corosync membership is still forming, ignoring"); return; } init_phase = FALSE; /* Reset last_seen for all cached nodes so we can tell which ones aren't * in the view list */ g_hash_table_iter_init(&iter, crm_peer_cache); while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &node)) { node->last_seen = 0; } /* Update the peer cache for each node in view list */ for (i = 0; i < view_list_entries; i++) { uint32_t id = view_list[i]; crm_debug("Member[%d] %u ", i, id); /* Get this node's peer cache entry (adding one if not already there) */ node = pcmk__get_node(id, NULL, NULL, pcmk__node_search_cluster_member); if (node->uname == NULL) { char *name = pcmk__corosync_name(0, id); crm_info("Obtaining name for new node %u", id); node = pcmk__get_node(id, name, NULL, pcmk__node_search_cluster_member); free(name); } /* Update the node state (including updating last_seen to ring_id) */ pcmk__update_peer_state(__func__, node, CRM_NODE_MEMBER, ring_id); } /* Remove any peer cache entries we didn't update */ pcmk__reap_unseen_nodes(ring_id); if (quorum_app_callback) { quorum_app_callback(ring_id, quorate); } } /*! * \internal * \brief Connect to Corosync quorum service * * \param[in] dispatch Connection dispatch callback * \param[in] destroy Connection destroy callback */ void pcmk__corosync_quorum_connect(gboolean (*dispatch)(unsigned long long, gboolean), void (*destroy)(gpointer)) { cs_error_t rc; int fd = 0; int quorate = 0; uint32_t quorum_type = 0; struct mainloop_fd_callbacks quorum_fd_callbacks; uid_t found_uid = 0; gid_t found_gid = 0; pid_t found_pid = 0; int rv; quorum_fd_callbacks.dispatch = quorum_dispatch_cb; quorum_fd_callbacks.destroy = destroy; crm_debug("Configuring Pacemaker to obtain quorum from Corosync"); { #if 0 // New way but not supported by all Corosync 2 versions quorum_model_v0_data_t quorum_model_data = { .model = QUORUM_MODEL_V0, .quorum_notify_fn = quorum_notification_cb, }; rc = quorum_model_initialize(&pcmk_quorum_handle, QUORUM_MODEL_V0, (quorum_model_data_t *) &quorum_model_data, &quorum_type, NULL); #else quorum_callbacks_t quorum_callbacks = { .quorum_notify_fn = quorum_notification_cb, }; rc = quorum_initialize(&pcmk_quorum_handle, &quorum_callbacks, &quorum_type); #endif } if (rc != CS_OK) { crm_err("Could not connect to the Quorum API: %s (%d)", cs_strerror(rc), rc); goto bail; } else if (quorum_type != QUORUM_SET) { crm_err("Corosync quorum is not configured"); goto bail; } rc = quorum_fd_get(pcmk_quorum_handle, &fd); if (rc != CS_OK) { crm_err("Could not obtain the Quorum API connection: %s (%d)", strerror(rc), rc); goto bail; } /* Quorum provider run as root (in given user namespace, anyway)? */ if (!(rv = crm_ipc_is_authentic_process(fd, (uid_t) 0,(gid_t) 0, &found_pid, &found_uid, &found_gid))) { crm_err("Quorum provider is not authentic:" " process %lld (uid: %lld, gid: %lld)", (long long) PCMK__SPECIAL_PID_AS_0(found_pid), (long long) found_uid, (long long) found_gid); rc = CS_ERR_ACCESS; goto bail; } else if (rv < 0) { crm_err("Could not verify authenticity of Quorum provider: %s (%d)", strerror(-rv), -rv); rc = CS_ERR_ACCESS; goto bail; } rc = quorum_getquorate(pcmk_quorum_handle, &quorate); if (rc != CS_OK) { crm_err("Could not obtain the current Quorum API state: %d", rc); goto bail; } if (quorate) { crm_notice("Quorum acquired"); } else { crm_warn("No quorum"); } quorum_app_callback = dispatch; crm_have_quorum = quorate; rc = quorum_trackstart(pcmk_quorum_handle, CS_TRACK_CHANGES | CS_TRACK_CURRENT); if (rc != CS_OK) { crm_err("Could not setup Quorum API notifications: %d", rc); goto bail; } mainloop_add_fd("quorum", G_PRIORITY_HIGH, fd, dispatch, &quorum_fd_callbacks); pcmk__corosync_add_nodes(NULL); bail: if (rc != CS_OK) { quorum_finalize(pcmk_quorum_handle); } } /*! * \internal * \brief Connect to Corosync cluster layer * * \param[in,out] cluster Initialized cluster object to connect * * \return Standard Pacemaker return code */ int pcmk__corosync_connect(pcmk_cluster_t *cluster) { crm_node_t *peer = NULL; const enum pcmk_cluster_layer cluster_layer = pcmk_get_cluster_layer(); const char *cluster_layer_s = pcmk_cluster_layer_text(cluster_layer); int rc = pcmk_rc_ok; pcmk__cluster_init_node_caches(); if (cluster_layer != pcmk_cluster_layer_corosync) { crm_err("Invalid cluster layer: %s " CRM_XS " cluster_layer=%d", cluster_layer_s, cluster_layer); return EINVAL; } rc = pcmk__cpg_connect(cluster); if (rc != pcmk_rc_ok) { // Error message was logged by pcmk__cpg_connect() return rc; } crm_info("Connection to %s established", cluster_layer_s); cluster->nodeid = pcmk__cpg_local_nodeid(0); if (cluster->nodeid == 0) { crm_err("Could not determine local node ID"); return ENXIO; } - cluster->uname = get_node_name(0); + cluster->uname = pcmk__cluster_node_name(0); if (cluster->uname == NULL) { crm_err("Could not determine local node name"); return ENXIO; } // Ensure local node always exists in peer cache peer = pcmk__get_node(cluster->nodeid, cluster->uname, NULL, pcmk__node_search_cluster_member); cluster->uuid = pcmk__corosync_uuid(peer); return pcmk_rc_ok; } /*! * \internal * \brief Check whether a Corosync cluster is active * * \return \c true if Corosync is found active, or \c false otherwise */ bool pcmk__corosync_is_active(void) { cmap_handle_t handle; int rc = pcmk__init_cmap(&handle); if (rc == CS_OK) { cmap_finalize(handle); return true; } crm_info("Failed to initialize the cmap API: %s (%d)", pcmk__cs_err_str(rc), rc); return false; } /*! * \internal * \brief Check whether a Corosync cluster peer is active * * \param[in] node Node to check * * \return \c true if \p node is an active Corosync peer, or \c false otherwise */ bool pcmk__corosync_is_peer_active(const crm_node_t *node) { if (node == NULL) { crm_trace("Corosync peer inactive: NULL"); return false; } if (!pcmk__str_eq(node->state, CRM_NODE_MEMBER, pcmk__str_none)) { crm_trace("Corosync peer %s inactive: state=%s", node->uname, node->state); return false; } if (!pcmk_is_set(node->processes, crm_proc_cpg)) { crm_trace("Corosync peer %s inactive " CRM_XS " processes=%.16" PRIx32, node->uname, node->processes); return false; } return true; } /*! * \internal * \brief Load Corosync node list (via CMAP) into peer cache and optionally XML * * \param[in,out] xml_parent If not NULL, add entry here for each node * * \return true if any nodes were found, false otherwise */ bool pcmk__corosync_add_nodes(xmlNode *xml_parent) { int lpc = 0; cs_error_t rc = CS_OK; int retries = 0; bool any = false; cmap_handle_t cmap_handle; int fd = -1; uid_t found_uid = 0; gid_t found_gid = 0; pid_t found_pid = 0; int rv; do { rc = pcmk__init_cmap(&cmap_handle); if (rc != CS_OK) { retries++; crm_debug("API connection setup failed: %s. Retrying in %ds", cs_strerror(rc), retries); sleep(retries); } } while (retries < 5 && rc != CS_OK); if (rc != CS_OK) { crm_warn("Could not connect to Cluster Configuration Database API, error %d", rc); return false; } rc = cmap_fd_get(cmap_handle, &fd); if (rc != CS_OK) { crm_err("Could not obtain the CMAP API connection: %s (%d)", cs_strerror(rc), rc); goto bail; } /* CMAP provider run as root (in given user namespace, anyway)? */ if (!(rv = crm_ipc_is_authentic_process(fd, (uid_t) 0,(gid_t) 0, &found_pid, &found_uid, &found_gid))) { crm_err("CMAP provider is not authentic:" " process %lld (uid: %lld, gid: %lld)", (long long) PCMK__SPECIAL_PID_AS_0(found_pid), (long long) found_uid, (long long) found_gid); goto bail; } else if (rv < 0) { crm_err("Could not verify authenticity of CMAP provider: %s (%d)", strerror(-rv), -rv); goto bail; } pcmk__cluster_init_node_caches(); crm_trace("Initializing Corosync node list"); for (lpc = 0; TRUE; lpc++) { uint32_t nodeid = 0; char *name = NULL; char *key = NULL; key = crm_strdup_printf("nodelist.node.%d.nodeid", lpc); rc = cmap_get_uint32(cmap_handle, key, &nodeid); free(key); if (rc != CS_OK) { break; } name = pcmk__corosync_name(cmap_handle, nodeid); if (name != NULL) { GHashTableIter iter; crm_node_t *node = NULL; g_hash_table_iter_init(&iter, crm_peer_cache); while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &node)) { if(node && node->uname && strcasecmp(node->uname, name) == 0) { if (node->id && node->id != nodeid) { crm_crit("Nodes %u and %u share the same name '%s': shutting down", node->id, nodeid, name); crm_exit(CRM_EX_FATAL); } } } } if (nodeid > 0 || name != NULL) { crm_trace("Initializing node[%d] %u = %s", lpc, nodeid, name); pcmk__get_node(nodeid, name, NULL, pcmk__node_search_cluster_member); } if (nodeid > 0 && name != NULL) { any = true; if (xml_parent) { xmlNode *node = pcmk__xe_create(xml_parent, PCMK_XE_NODE); crm_xml_set_id(node, "%u", nodeid); crm_xml_add(node, PCMK_XA_UNAME, name); } } free(name); } bail: cmap_finalize(cmap_handle); return any; } /*! * \internal * \brief Get cluster name from Corosync configuration (via CMAP) * * \return Newly allocated string with cluster name if configured, or NULL */ char * pcmk__corosync_cluster_name(void) { cmap_handle_t handle; char *cluster_name = NULL; cs_error_t rc = CS_OK; int fd = -1; uid_t found_uid = 0; gid_t found_gid = 0; pid_t found_pid = 0; int rv; rc = pcmk__init_cmap(&handle); if (rc != CS_OK) { crm_info("Failed to initialize the cmap API: %s (%d)", cs_strerror(rc), rc); return NULL; } rc = cmap_fd_get(handle, &fd); if (rc != CS_OK) { crm_err("Could not obtain the CMAP API connection: %s (%d)", cs_strerror(rc), rc); goto bail; } /* CMAP provider run as root (in given user namespace, anyway)? */ if (!(rv = crm_ipc_is_authentic_process(fd, (uid_t) 0,(gid_t) 0, &found_pid, &found_uid, &found_gid))) { crm_err("CMAP provider is not authentic:" " process %lld (uid: %lld, gid: %lld)", (long long) PCMK__SPECIAL_PID_AS_0(found_pid), (long long) found_uid, (long long) found_gid); goto bail; } else if (rv < 0) { crm_err("Could not verify authenticity of CMAP provider: %s (%d)", strerror(-rv), -rv); goto bail; } rc = cmap_get_string(handle, "totem.cluster_name", &cluster_name); if (rc != CS_OK) { crm_info("Cannot get totem.cluster_name: %s (%d)", cs_strerror(rc), rc); } else { crm_debug("cmap totem.cluster_name = '%s'", cluster_name); } bail: cmap_finalize(handle); return cluster_name; } /*! * \internal * \brief Check (via CMAP) whether Corosync configuration has a node list * * \return true if Corosync has node list, otherwise false */ bool pcmk__corosync_has_nodelist(void) { cs_error_t cs_rc = CS_OK; int retries = 0; cmap_handle_t cmap_handle; cmap_iter_handle_t iter_handle; char key_name[CMAP_KEYNAME_MAXLEN + 1]; int fd = -1; uid_t found_uid = 0; gid_t found_gid = 0; pid_t found_pid = 0; int rc = pcmk_ok; static bool got_result = false; static bool result = false; if (got_result) { return result; } // Connect to CMAP do { cs_rc = pcmk__init_cmap(&cmap_handle); if (cs_rc != CS_OK) { retries++; crm_debug("CMAP connection failed: %s (rc=%d, retrying in %ds)", cs_strerror(cs_rc), cs_rc, retries); sleep(retries); } } while ((retries < 5) && (cs_rc != CS_OK)); if (cs_rc != CS_OK) { crm_warn("Assuming Corosync does not have node list: " "CMAP connection failed (%s) " CRM_XS " rc=%d", cs_strerror(cs_rc), cs_rc); return false; } // Get CMAP connection file descriptor cs_rc = cmap_fd_get(cmap_handle, &fd); if (cs_rc != CS_OK) { crm_warn("Assuming Corosync does not have node list: " "CMAP unusable (%s) " CRM_XS " rc=%d", cs_strerror(cs_rc), cs_rc); goto bail; } // Check whether CMAP connection is authentic (i.e. provided by root) rc = crm_ipc_is_authentic_process(fd, (uid_t) 0, (gid_t) 0, &found_pid, &found_uid, &found_gid); if (rc == 0) { crm_warn("Assuming Corosync does not have node list: " "CMAP provider is inauthentic " CRM_XS " pid=%lld uid=%lld gid=%lld", (long long) PCMK__SPECIAL_PID_AS_0(found_pid), (long long) found_uid, (long long) found_gid); goto bail; } else if (rc < 0) { crm_warn("Assuming Corosync does not have node list: " "Could not verify CMAP authenticity (%s) " CRM_XS " rc=%d", pcmk_strerror(rc), rc); goto bail; } // Check whether nodelist section is presetn cs_rc = cmap_iter_init(cmap_handle, "nodelist", &iter_handle); if (cs_rc != CS_OK) { crm_warn("Assuming Corosync does not have node list: " "CMAP not readable (%s) " CRM_XS " rc=%d", cs_strerror(cs_rc), cs_rc); goto bail; } cs_rc = cmap_iter_next(cmap_handle, iter_handle, key_name, NULL, NULL); if (cs_rc == CS_OK) { result = true; } cmap_iter_finalize(cmap_handle, iter_handle); got_result = true; crm_debug("Corosync %s node list", (result? "has" : "does not have")); bail: cmap_finalize(cmap_handle); return result; } // Deprecated functions kept only for backward API compatibility // LCOV_EXCL_START #include gboolean crm_is_corosync_peer_active(const crm_node_t *node) { return pcmk__corosync_is_peer_active(node); } // LCOV_EXCL_STOP // End deprecated API diff --git a/lib/cluster/membership.c b/lib/cluster/membership.c index 6856cf8f13..70330e22db 100644 --- a/lib/cluster/membership.c +++ b/lib/cluster/membership.c @@ -1,1549 +1,1549 @@ /* * Copyright 2004-2024 the Pacemaker project contributors * * The version control history for this file may have further details. * * This source code is licensed under the GNU Lesser General Public License * version 2.1 or later (LGPLv2.1+) WITHOUT ANY WARRANTY. */ #include #ifndef _GNU_SOURCE # define _GNU_SOURCE #endif #include // PRIu32 #include #include #include #include #include #include #include #include #include #include #include #include "crmcluster_private.h" /* The peer cache remembers cluster nodes that have been seen. * This is managed mostly automatically by libcluster, based on * cluster membership events. * * Because cluster nodes can have conflicting names or UUIDs, * the hash table key is a uniquely generated ID. * * @COMPAT When this is internal, rename to cluster_node_member_cache and make * static. */ GHashTable *crm_peer_cache = NULL; /* * The remote peer cache tracks pacemaker_remote nodes. While the * value has the same type as the peer cache's, it is tracked separately for * three reasons: pacemaker_remote nodes can't have conflicting names or UUIDs, * so the name (which is also the UUID) is used as the hash table key; there * is no equivalent of membership events, so management is not automatic; and * most users of the peer cache need to exclude pacemaker_remote nodes. * * That said, using a single cache would be more logical and less error-prone, * so it would be a good idea to merge them one day. * * libcluster provides two avenues for populating the cache: * pcmk__cluster_lookup_remote_node() and pcmk__cluster_forget_remote_node() * directly manage it, while refresh_remote_nodes() populates it via the CIB. */ GHashTable *crm_remote_peer_cache = NULL; /* * The CIB cluster node cache tracks cluster nodes that have been seen in * the CIB. It is useful mainly when a caller needs to know about a node that * may no longer be in the membership, but doesn't want to add the node to the * main peer cache tables. */ static GHashTable *cluster_node_cib_cache = NULL; unsigned long long crm_peer_seq = 0; gboolean crm_have_quorum = FALSE; static gboolean crm_autoreap = TRUE; // Flag setting and clearing for crm_node_t:flags #define set_peer_flags(peer, flags_to_set) do { \ (peer)->flags = pcmk__set_flags_as(__func__, __LINE__, LOG_TRACE, \ "Peer", (peer)->uname, \ (peer)->flags, (flags_to_set), \ #flags_to_set); \ } while (0) #define clear_peer_flags(peer, flags_to_clear) do { \ (peer)->flags = pcmk__clear_flags_as(__func__, __LINE__, \ LOG_TRACE, \ "Peer", (peer)->uname, \ (peer)->flags, (flags_to_clear), \ #flags_to_clear); \ } while (0) static void update_peer_uname(crm_node_t *node, const char *uname); static crm_node_t *find_cib_cluster_node(const char *id, const char *uname); /*! * \internal * \brief Get the number of Pacemaker Remote nodes that have been seen * * \return Number of cached Pacemaker Remote nodes */ unsigned int pcmk__cluster_num_remote_nodes(void) { if (crm_remote_peer_cache == NULL) { return 0U; } return g_hash_table_size(crm_remote_peer_cache); } /*! * \internal * \brief Get a remote node cache entry, creating it if necessary * * \param[in] node_name Name of remote node * * \return Cache entry for node on success, or \c NULL (and set \c errno) * otherwise * * \note When creating a new entry, this will leave the node state undetermined. * The caller should also call \c pcmk__update_peer_state() if the state * is known. * \note Because this can add and remove cache entries, callers should not * assume any previously obtained cache entry pointers remain valid. */ crm_node_t * pcmk__cluster_lookup_remote_node(const char *node_name) { crm_node_t *node; char *node_name_copy = NULL; if (node_name == NULL) { errno = EINVAL; return NULL; } /* It's theoretically possible that the node was added to the cluster peer * cache before it was known to be a Pacemaker Remote node. Remove that * entry unless it has a node ID, which means the name actually is * associated with a cluster node. (@TODO return an error in that case?) */ node = pcmk__search_node_caches(0, node_name, pcmk__node_search_cluster_member); if ((node != NULL) && (node->uuid == NULL)) { /* node_name could be a pointer into the cache entry being removed, so * reassign it to a copy before the original gets freed */ node_name_copy = strdup(node_name); if (node_name_copy == NULL) { errno = ENOMEM; return NULL; } node_name = node_name_copy; pcmk__cluster_forget_cluster_node(0, node_name); } /* Return existing cache entry if one exists */ node = g_hash_table_lookup(crm_remote_peer_cache, node_name); if (node) { free(node_name_copy); return node; } /* Allocate a new entry */ node = calloc(1, sizeof(crm_node_t)); if (node == NULL) { free(node_name_copy); return NULL; } /* Populate the essential information */ set_peer_flags(node, crm_remote_node); node->uuid = strdup(node_name); if (node->uuid == NULL) { free(node); errno = ENOMEM; free(node_name_copy); return NULL; } /* Add the new entry to the cache */ g_hash_table_replace(crm_remote_peer_cache, node->uuid, node); crm_trace("added %s to remote cache", node_name); /* Update the entry's uname, ensuring peer status callbacks are called */ update_peer_uname(node, node_name); free(node_name_copy); return node; } /*! * \internal * \brief Remove a node from the Pacemaker Remote node cache * * \param[in] node_name Name of node to remove from cache * * \note The caller must be careful not to use \p node_name after calling this * function if it might be a pointer into the cache entry being removed. */ void pcmk__cluster_forget_remote_node(const char *node_name) { /* Do a lookup first, because node_name could be a pointer within the entry * being removed -- we can't log it *after* removing it. */ if (g_hash_table_lookup(crm_remote_peer_cache, node_name) != NULL) { crm_trace("Removing %s from Pacemaker Remote node cache", node_name); g_hash_table_remove(crm_remote_peer_cache, node_name); } } /*! * \internal * \brief Return node status based on a CIB status entry * * \param[in] node_state XML of node state * * \return \c CRM_NODE_LOST if \c PCMK__XA_IN_CCM is false in * \c PCMK__XE_NODE_STATE, \c CRM_NODE_MEMBER otherwise * \note Unlike most boolean XML attributes, this one defaults to true, for * backward compatibility with older controllers that don't set it. */ static const char * remote_state_from_cib(const xmlNode *node_state) { bool status = false; if ((pcmk__xe_get_bool_attr(node_state, PCMK__XA_IN_CCM, &status) == pcmk_rc_ok) && !status) { return CRM_NODE_LOST; } else { return CRM_NODE_MEMBER; } } /* user data for looping through remote node xpath searches */ struct refresh_data { const char *field; /* XML attribute to check for node name */ gboolean has_state; /* whether to update node state based on XML */ }; /*! * \internal * \brief Process one pacemaker_remote node xpath search result * * \param[in] result XML search result * \param[in] user_data what to look for in the XML */ static void remote_cache_refresh_helper(xmlNode *result, void *user_data) { const struct refresh_data *data = user_data; const char *remote = crm_element_value(result, data->field); const char *state = NULL; crm_node_t *node; CRM_CHECK(remote != NULL, return); /* Determine node's state, if the result has it */ if (data->has_state) { state = remote_state_from_cib(result); } /* Check whether cache already has entry for node */ node = g_hash_table_lookup(crm_remote_peer_cache, remote); if (node == NULL) { /* Node is not in cache, so add a new entry for it */ node = pcmk__cluster_lookup_remote_node(remote); CRM_ASSERT(node); if (state) { pcmk__update_peer_state(__func__, node, state, 0); } } else if (pcmk_is_set(node->flags, crm_node_dirty)) { /* Node is in cache and hasn't been updated already, so mark it clean */ clear_peer_flags(node, crm_node_dirty); if (state) { pcmk__update_peer_state(__func__, node, state, 0); } } } static void mark_dirty(gpointer key, gpointer value, gpointer user_data) { set_peer_flags((crm_node_t *) value, crm_node_dirty); } static gboolean is_dirty(gpointer key, gpointer value, gpointer user_data) { return pcmk_is_set(((crm_node_t*)value)->flags, crm_node_dirty); } /*! * \internal * \brief Repopulate the remote node cache based on CIB XML * * \param[in] cib CIB XML to parse */ static void refresh_remote_nodes(xmlNode *cib) { struct refresh_data data; pcmk__cluster_init_node_caches(); /* First, we mark all existing cache entries as dirty, * so that later we can remove any that weren't in the CIB. * We don't empty the cache, because we need to detect changes in state. */ g_hash_table_foreach(crm_remote_peer_cache, mark_dirty, NULL); /* Look for guest nodes and remote nodes in the status section */ data.field = PCMK_XA_ID; data.has_state = TRUE; crm_foreach_xpath_result(cib, PCMK__XP_REMOTE_NODE_STATUS, remote_cache_refresh_helper, &data); /* Look for guest nodes and remote nodes in the configuration section, * because they may have just been added and not have a status entry yet. * In that case, the cached node state will be left NULL, so that the * peer status callback isn't called until we're sure the node started * successfully. */ data.field = PCMK_XA_VALUE; data.has_state = FALSE; crm_foreach_xpath_result(cib, PCMK__XP_GUEST_NODE_CONFIG, remote_cache_refresh_helper, &data); data.field = PCMK_XA_ID; data.has_state = FALSE; crm_foreach_xpath_result(cib, PCMK__XP_REMOTE_NODE_CONFIG, remote_cache_refresh_helper, &data); /* Remove all old cache entries that weren't seen in the CIB */ g_hash_table_foreach_remove(crm_remote_peer_cache, is_dirty, NULL); } /*! * \internal * \brief Check whether a node is an active cluster node * * Remote nodes are never considered active. This guarantees that they can never * become DC. * * \param[in] node Node to check * * \return \c true if the node is an active cluster node, or \c false otherwise */ bool pcmk__cluster_is_node_active(const crm_node_t *node) { const enum pcmk_cluster_layer cluster_layer = pcmk_get_cluster_layer(); if ((node == NULL) || pcmk_is_set(node->flags, crm_remote_node)) { return false; } switch (cluster_layer) { case pcmk_cluster_layer_corosync: #if SUPPORT_COROSYNC return pcmk__corosync_is_peer_active(node); #else break; #endif // SUPPORT_COROSYNC default: break; } crm_err("Unhandled cluster layer: %s", pcmk_cluster_layer_text(cluster_layer)); return false; } /*! * \internal * \brief Check if a node's entry should be removed from the cluster node cache * * A node should be removed from the cache if it's inactive and matches another * \c crm_node_t (the search object). The node is considered a mismatch if any * of the following are true: * * The search object is \c NULL. * * The search object has an ID set and the cached node's ID does not match it. * * The search object does not have an ID set, and the cached node's name does * not match the search node's name. (If both names are \c NULL, it's a * match.) * * Otherwise, the node is considered a match. * * Note that if the search object has both an ID and a name set, the name is * ignored for matching purposes. * * \param[in] key Ignored * \param[in] value \c crm_node_t object from cluster node cache * \param[in] user_data \c crm_node_t object to match against (search object) * * \return \c TRUE if the node entry should be removed from \c crm_peer_cache, * or \c FALSE otherwise */ static gboolean should_forget_cluster_node(gpointer key, gpointer value, gpointer user_data) { crm_node_t *node = value; crm_node_t *search = user_data; if (search == NULL) { return FALSE; } if ((search->id != 0) && (node->id != search->id)) { return FALSE; } if ((search->id == 0) && !pcmk__str_eq(node->uname, search->uname, pcmk__str_casei)) { // @TODO Consider name even if ID is set? return FALSE; } if (pcmk__cluster_is_node_active(value)) { return FALSE; } crm_info("Removing node with name %s and " PCMK_XA_ID " %u from membership " "cache", pcmk__s(node->uname, "(unknown)"), node->id); return TRUE; } /*! * \internal * \brief Remove one or more inactive nodes from the cluster node cache * * All inactive nodes matching \p id and \p node_name as described in * \c should_forget_cluster_node documentation are removed from the cache. * * If \p id is 0 and \p node_name is \c NULL, all inactive nodes are removed * from the cache regardless of ID and name. This differs from clearing the * cache, in that entries for active nodes are preserved. * * \param[in] id ID of node to remove from cache (0 to ignore) * \param[in] node_name Name of node to remove from cache (ignored if \p id is * nonzero) * * \note \p node_name is not modified directly, but it will be freed if it's a * pointer into a cache entry that is removed. */ void pcmk__cluster_forget_cluster_node(uint32_t id, const char *node_name) { crm_node_t search = { 0, }; char *criterion = NULL; // For logging guint matches = 0; if (crm_peer_cache == NULL) { crm_trace("Membership cache not initialized, ignoring removal request"); return; } search.id = id; search.uname = pcmk__str_copy(node_name); // May log after original freed if (id > 0) { criterion = crm_strdup_printf(PCMK_XA_ID "=%" PRIu32, id); } else if (node_name != NULL) { criterion = crm_strdup_printf(PCMK_XA_UNAME "=%s", node_name); } matches = g_hash_table_foreach_remove(crm_peer_cache, should_forget_cluster_node, &search); if (matches > 0) { if (criterion != NULL) { crm_notice("Removed %u inactive node%s with %s from the membership " "cache", matches, pcmk__plural_s(matches), criterion); } else { crm_notice("Removed all (%u) inactive cluster nodes from the " "membership cache", matches); } } else { crm_info("No inactive cluster nodes%s%s to remove from the membership " "cache", ((criterion != NULL)? " with" : ""), pcmk__s(criterion, "")); } free(search.uname); free(criterion); } static void count_peer(gpointer key, gpointer value, gpointer user_data) { unsigned int *count = user_data; crm_node_t *node = value; if (pcmk__cluster_is_node_active(node)) { *count = *count + 1; } } /*! * \internal * \brief Get the number of active cluster nodes that have been seen * * Remote nodes are never considered active. This guarantees that they can never * become DC. * * \return Number of active nodes in the cluster node cache */ unsigned int pcmk__cluster_num_active_nodes(void) { unsigned int count = 0; if (crm_peer_cache != NULL) { g_hash_table_foreach(crm_peer_cache, count_peer, &count); } return count; } static void destroy_crm_node(gpointer data) { crm_node_t *node = data; crm_trace("Destroying entry for node %u: %s", node->id, node->uname); free(node->uname); free(node->state); free(node->uuid); free(node->expected); free(node->conn_host); free(node); } /*! * \internal * \brief Initialize node caches */ void pcmk__cluster_init_node_caches(void) { if (crm_peer_cache == NULL) { crm_peer_cache = pcmk__strikey_table(free, destroy_crm_node); } if (crm_remote_peer_cache == NULL) { crm_remote_peer_cache = pcmk__strikey_table(NULL, destroy_crm_node); } if (cluster_node_cib_cache == NULL) { cluster_node_cib_cache = pcmk__strikey_table(free, destroy_crm_node); } } /*! * \internal * \brief Initialize node caches */ void pcmk__cluster_destroy_node_caches(void) { if (crm_peer_cache != NULL) { crm_trace("Destroying peer cache with %d members", g_hash_table_size(crm_peer_cache)); g_hash_table_destroy(crm_peer_cache); crm_peer_cache = NULL; } if (crm_remote_peer_cache != NULL) { crm_trace("Destroying remote peer cache with %d members", pcmk__cluster_num_remote_nodes()); g_hash_table_destroy(crm_remote_peer_cache); crm_remote_peer_cache = NULL; } if (cluster_node_cib_cache != NULL) { crm_trace("Destroying configured cluster node cache with %d members", g_hash_table_size(cluster_node_cib_cache)); g_hash_table_destroy(cluster_node_cib_cache); cluster_node_cib_cache = NULL; } } static void (*peer_status_callback)(enum crm_status_type, crm_node_t *, const void *) = NULL; /*! * \brief Set a client function that will be called after peer status changes * * \param[in] dispatch Pointer to function to use as callback * * \note Previously, client callbacks were responsible for peer cache * management. This is no longer the case, and client callbacks should do * only client-specific handling. Callbacks MUST NOT add or remove entries * in the peer caches. */ void crm_set_status_callback(void (*dispatch) (enum crm_status_type, crm_node_t *, const void *)) { peer_status_callback = dispatch; } /*! * \brief Tell the library whether to automatically reap lost nodes * * If TRUE (the default), calling crm_update_peer_proc() will also update the * peer state to CRM_NODE_MEMBER or CRM_NODE_LOST, and pcmk__update_peer_state() * will reap peers whose state changes to anything other than CRM_NODE_MEMBER. * Callers should leave this enabled unless they plan to manage the cache * separately on their own. * * \param[in] autoreap TRUE to enable automatic reaping, FALSE to disable */ void crm_set_autoreap(gboolean autoreap) { crm_autoreap = autoreap; } static void dump_peer_hash(int level, const char *caller) { GHashTableIter iter; const char *id = NULL; crm_node_t *node = NULL; g_hash_table_iter_init(&iter, crm_peer_cache); while (g_hash_table_iter_next(&iter, (gpointer *) &id, (gpointer *) &node)) { do_crm_log(level, "%s: Node %u/%s = %p - %s", caller, node->id, node->uname, node, id); } } static gboolean hash_find_by_data(gpointer key, gpointer value, gpointer user_data) { return value == user_data; } /*! * \internal * \brief Search caches for a node (cluster or Pacemaker Remote) * * \param[in] id If not 0, cluster node ID to search for * \param[in] uname If not NULL, node name to search for * \param[in] flags Group of enum pcmk__node_search_flags * * \return Node cache entry if found, otherwise NULL */ crm_node_t * pcmk__search_node_caches(unsigned int id, const char *uname, uint32_t flags) { crm_node_t *node = NULL; CRM_ASSERT(id > 0 || uname != NULL); pcmk__cluster_init_node_caches(); if ((uname != NULL) && pcmk_is_set(flags, pcmk__node_search_remote)) { node = g_hash_table_lookup(crm_remote_peer_cache, uname); } if ((node == NULL) && pcmk_is_set(flags, pcmk__node_search_cluster_member)) { node = pcmk__search_cluster_node_cache(id, uname, NULL); } if ((node == NULL) && pcmk_is_set(flags, pcmk__node_search_cluster_cib)) { char *id_str = (id == 0)? NULL : crm_strdup_printf("%u", id); node = find_cib_cluster_node(id_str, uname); free(id_str); } return node; } /*! * \internal * \brief Purge a node from cache (both cluster and Pacemaker Remote) * * \param[in] node_name If not NULL, purge only nodes with this name * \param[in] node_id If not 0, purge cluster nodes only if they have this ID * * \note If \p node_name is NULL and \p node_id is 0, no nodes will be purged. * If \p node_name is not NULL and \p node_id is not 0, Pacemaker Remote * nodes that match \p node_name will be purged, and cluster nodes that * match both \p node_name and \p node_id will be purged. * \note The caller must be careful not to use \p node_name after calling this * function if it might be a pointer into a cache entry being removed. */ void pcmk__purge_node_from_cache(const char *node_name, uint32_t node_id) { char *node_name_copy = NULL; if ((node_name == NULL) && (node_id == 0U)) { return; } // Purge from Pacemaker Remote node cache if ((node_name != NULL) && (g_hash_table_lookup(crm_remote_peer_cache, node_name) != NULL)) { /* node_name could be a pointer into the cache entry being purged, * so reassign it to a copy before the original gets freed */ node_name_copy = pcmk__str_copy(node_name); node_name = node_name_copy; crm_trace("Purging %s from Pacemaker Remote node cache", node_name); g_hash_table_remove(crm_remote_peer_cache, node_name); } pcmk__cluster_forget_cluster_node(node_id, node_name); free(node_name_copy); } /*! * \internal * \brief Search cluster node cache * * \param[in] id If not 0, cluster node ID to search for * \param[in] uname If not NULL, node name to search for * \param[in] uuid If not NULL while id is 0, node UUID instead of cluster * node ID to search for * * \return Cluster node cache entry if found, otherwise NULL */ crm_node_t * pcmk__search_cluster_node_cache(unsigned int id, const char *uname, const char *uuid) { GHashTableIter iter; crm_node_t *node = NULL; crm_node_t *by_id = NULL; crm_node_t *by_name = NULL; CRM_ASSERT(id > 0 || uname != NULL); pcmk__cluster_init_node_caches(); if (uname != NULL) { g_hash_table_iter_init(&iter, crm_peer_cache); while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &node)) { if(node->uname && strcasecmp(node->uname, uname) == 0) { crm_trace("Name match: %s = %p", node->uname, node); by_name = node; break; } } } if (id > 0) { g_hash_table_iter_init(&iter, crm_peer_cache); while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &node)) { if(node->id == id) { crm_trace("ID match: %u = %p", node->id, node); by_id = node; break; } } } else if (uuid != NULL) { g_hash_table_iter_init(&iter, crm_peer_cache); while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &node)) { if (pcmk__str_eq(node->uuid, uuid, pcmk__str_casei)) { crm_trace("UUID match: %s = %p", node->uuid, node); by_id = node; break; } } } node = by_id; /* Good default */ if(by_id == by_name) { /* Nothing to do if they match (both NULL counts) */ crm_trace("Consistent: %p for %u/%s", by_id, id, uname); } else if(by_id == NULL && by_name) { crm_trace("Only one: %p for %u/%s", by_name, id, uname); if(id && by_name->id) { dump_peer_hash(LOG_WARNING, __func__); crm_crit("Node %u and %u share the same name '%s'", id, by_name->id, uname); node = NULL; /* Create a new one */ } else { node = by_name; } } else if(by_name == NULL && by_id) { crm_trace("Only one: %p for %u/%s", by_id, id, uname); if(uname && by_id->uname) { dump_peer_hash(LOG_WARNING, __func__); crm_crit("Node '%s' and '%s' share the same cluster nodeid %u: assuming '%s' is correct", uname, by_id->uname, id, uname); } } else if(uname && by_id->uname) { if(pcmk__str_eq(uname, by_id->uname, pcmk__str_casei)) { crm_notice("Node '%s' has changed its ID from %u to %u", by_id->uname, by_name->id, by_id->id); g_hash_table_foreach_remove(crm_peer_cache, hash_find_by_data, by_name); } else { crm_warn("Node '%s' and '%s' share the same cluster nodeid: %u %s", by_id->uname, by_name->uname, id, uname); dump_peer_hash(LOG_INFO, __func__); crm_abort(__FILE__, __func__, __LINE__, "member weirdness", TRUE, TRUE); } } else if(id && by_name->id) { crm_warn("Node %u and %u share the same name: '%s'", by_id->id, by_name->id, uname); } else { /* Simple merge */ /* Only corosync-based clusters use node IDs. The functions that call * pcmk__update_peer_state() and crm_update_peer_proc() only know * nodeid, so 'by_id' is authoritative when merging. */ dump_peer_hash(LOG_DEBUG, __func__); crm_info("Merging %p into %p", by_name, by_id); g_hash_table_foreach_remove(crm_peer_cache, hash_find_by_data, by_name); } return node; } #if SUPPORT_COROSYNC static guint remove_conflicting_peer(crm_node_t *node) { int matches = 0; GHashTableIter iter; crm_node_t *existing_node = NULL; if (node->id == 0 || node->uname == NULL) { return 0; } if (!pcmk__corosync_has_nodelist()) { return 0; } g_hash_table_iter_init(&iter, crm_peer_cache); while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &existing_node)) { if (existing_node->id > 0 && existing_node->id != node->id && existing_node->uname != NULL && strcasecmp(existing_node->uname, node->uname) == 0) { if (pcmk__cluster_is_node_active(existing_node)) { continue; } crm_warn("Removing cached offline node %u/%s which has conflicting uname with %u", existing_node->id, existing_node->uname, node->id); g_hash_table_iter_remove(&iter); matches++; } } return matches; } #endif /*! * \brief Get a cluster node cache entry * * \param[in] id If not 0, cluster node ID to search for * \param[in] uname If not NULL, node name to search for * \param[in] uuid If not NULL while id is 0, node UUID instead of cluster * node ID to search for * \param[in] flags Group of enum pcmk__node_search_flags * * \return (Possibly newly created) cluster node cache entry */ /* coverity[-alloc] Memory is referenced in one or both hashtables */ crm_node_t * pcmk__get_node(unsigned int id, const char *uname, const char *uuid, uint32_t flags) { crm_node_t *node = NULL; char *uname_lookup = NULL; CRM_ASSERT(id > 0 || uname != NULL); pcmk__cluster_init_node_caches(); // Check the Pacemaker Remote node cache first if (pcmk_is_set(flags, pcmk__node_search_remote)) { node = g_hash_table_lookup(crm_remote_peer_cache, uname); if (node != NULL) { return node; } } if (!pcmk_is_set(flags, pcmk__node_search_cluster_member)) { return NULL; } node = pcmk__search_cluster_node_cache(id, uname, uuid); /* if uname wasn't provided, and find_peer did not turn up a uname based on id. * we need to do a lookup of the node name using the id in the cluster membership. */ if ((node == NULL || node->uname == NULL) && (uname == NULL)) { - uname_lookup = get_node_name(id); + uname_lookup = pcmk__cluster_node_name(id); } if (uname_lookup) { uname = uname_lookup; crm_trace("Inferred a name of '%s' for node %u", uname, id); /* try to turn up the node one more time now that we know the uname. */ if (node == NULL) { node = pcmk__search_cluster_node_cache(id, uname, uuid); } } if (node == NULL) { char *uniqueid = crm_generate_uuid(); node = pcmk__assert_alloc(1, sizeof(crm_node_t)); crm_info("Created entry %s/%p for node %s/%u (%d total)", uniqueid, node, uname, id, 1 + g_hash_table_size(crm_peer_cache)); g_hash_table_replace(crm_peer_cache, uniqueid, node); } if(id > 0 && uname && (node->id == 0 || node->uname == NULL)) { crm_info("Node %u is now known as %s", id, uname); } if(id > 0 && node->id == 0) { node->id = id; } if (uname && (node->uname == NULL)) { update_peer_uname(node, uname); } if(node->uuid == NULL) { if (uuid == NULL) { uuid = pcmk__cluster_node_uuid(node); } if (uuid) { crm_info("Node %u has uuid %s", id, uuid); } else { crm_info("Cannot obtain a UUID for node %u/%s", id, node->uname); } } free(uname_lookup); return node; } /*! * \internal * \brief Update a node's uname * * \param[in,out] node Node object to update * \param[in] uname New name to set * * \note This function should not be called within a peer cache iteration, * because in some cases it can remove conflicting cache entries, * which would invalidate the iterator. */ static void update_peer_uname(crm_node_t *node, const char *uname) { CRM_CHECK(uname != NULL, crm_err("Bug: can't update node name without name"); return); CRM_CHECK(node != NULL, crm_err("Bug: can't update node name to %s without node", uname); return); if (pcmk__str_eq(uname, node->uname, pcmk__str_casei)) { crm_debug("Node uname '%s' did not change", uname); return; } for (const char *c = uname; *c; ++c) { if ((*c >= 'A') && (*c <= 'Z')) { crm_warn("Node names with capitals are discouraged, consider changing '%s'", uname); break; } } pcmk__str_update(&node->uname, uname); if (peer_status_callback != NULL) { peer_status_callback(crm_status_uname, node, NULL); } #if SUPPORT_COROSYNC if ((pcmk_get_cluster_layer() == pcmk_cluster_layer_corosync) && !pcmk_is_set(node->flags, crm_remote_node)) { remove_conflicting_peer(node); } #endif } /*! * \internal * \brief Get log-friendly string equivalent of a process flag * * \param[in] proc Process flag * * \return Log-friendly string equivalent of \p proc */ static inline const char * proc2text(enum crm_proc_flag proc) { const char *text = "unknown"; switch (proc) { case crm_proc_none: text = "none"; break; case crm_proc_cpg: text = "corosync-cpg"; break; } return text; } /*! * \internal * \brief Update a node's process information (and potentially state) * * \param[in] source Caller's function name (for log messages) * \param[in,out] node Node object to update * \param[in] flag Bitmask of new process information * \param[in] status node status (online, offline, etc.) * * \return NULL if any node was reaped from peer caches, value of node otherwise * * \note If this function returns NULL, the supplied node object was likely * freed and should not be used again. This function should not be * called within a cache iteration if reaping is possible, otherwise * reaping could invalidate the iterator. */ crm_node_t * crm_update_peer_proc(const char *source, crm_node_t * node, uint32_t flag, const char *status) { uint32_t last = 0; gboolean changed = FALSE; CRM_CHECK(node != NULL, crm_err("%s: Could not set %s to %s for NULL", source, proc2text(flag), status); return NULL); /* Pacemaker doesn't spawn processes on remote nodes */ if (pcmk_is_set(node->flags, crm_remote_node)) { return node; } last = node->processes; if (status == NULL) { node->processes = flag; if (node->processes != last) { changed = TRUE; } } else if (pcmk__str_eq(status, PCMK_VALUE_ONLINE, pcmk__str_casei)) { if ((node->processes & flag) != flag) { node->processes = pcmk__set_flags_as(__func__, __LINE__, LOG_TRACE, "Peer process", node->uname, node->processes, flag, "processes"); changed = TRUE; } } else if (node->processes & flag) { node->processes = pcmk__clear_flags_as(__func__, __LINE__, LOG_TRACE, "Peer process", node->uname, node->processes, flag, "processes"); changed = TRUE; } if (changed) { if (status == NULL && flag <= crm_proc_none) { crm_info("%s: Node %s[%u] - all processes are now offline", source, node->uname, node->id); } else { crm_info("%s: Node %s[%u] - %s is now %s", source, node->uname, node->id, proc2text(flag), status); } if (pcmk_is_set(node->processes, crm_get_cluster_proc())) { node->when_online = time(NULL); } else { node->when_online = 0; } /* Call the client callback first, then update the peer state, * in case the node will be reaped */ if (peer_status_callback != NULL) { peer_status_callback(crm_status_processes, node, &last); } /* The client callback shouldn't touch the peer caches, * but as a safety net, bail if the peer cache was destroyed. */ if (crm_peer_cache == NULL) { return NULL; } if (crm_autoreap) { const char *peer_state = NULL; if (pcmk_is_set(node->processes, crm_get_cluster_proc())) { peer_state = CRM_NODE_MEMBER; } else { peer_state = CRM_NODE_LOST; } node = pcmk__update_peer_state(__func__, node, peer_state, 0); } } else { crm_trace("%s: Node %s[%u] - %s is unchanged (%s)", source, node->uname, node->id, proc2text(flag), status); } return node; } /*! * \internal * \brief Update a cluster node cache entry's expected join state * * \param[in] source Caller's function name (for logging) * \param[in,out] node Node to update * \param[in] expected Node's new join state */ void pcmk__update_peer_expected(const char *source, crm_node_t *node, const char *expected) { char *last = NULL; gboolean changed = FALSE; CRM_CHECK(node != NULL, crm_err("%s: Could not set 'expected' to %s", source, expected); return); /* Remote nodes don't participate in joins */ if (pcmk_is_set(node->flags, crm_remote_node)) { return; } last = node->expected; if (expected != NULL && !pcmk__str_eq(node->expected, expected, pcmk__str_casei)) { node->expected = strdup(expected); changed = TRUE; } if (changed) { crm_info("%s: Node %s[%u] - expected state is now %s (was %s)", source, node->uname, node->id, expected, last); free(last); } else { crm_trace("%s: Node %s[%u] - expected state is unchanged (%s)", source, node->uname, node->id, expected); } } /*! * \internal * \brief Update a node's state and membership information * * \param[in] source Caller's function name (for log messages) * \param[in,out] node Node object to update * \param[in] state Node's new state * \param[in] membership Node's new membership ID * \param[in,out] iter If not NULL, pointer to node's peer cache iterator * * \return NULL if any node was reaped, value of node otherwise * * \note If this function returns NULL, the supplied node object was likely * freed and should not be used again. This function may be called from * within a peer cache iteration if the iterator is supplied. */ static crm_node_t * update_peer_state_iter(const char *source, crm_node_t *node, const char *state, uint64_t membership, GHashTableIter *iter) { gboolean is_member; CRM_CHECK(node != NULL, crm_err("Could not set state for unknown host to %s" CRM_XS " source=%s", state, source); return NULL); is_member = pcmk__str_eq(state, CRM_NODE_MEMBER, pcmk__str_casei); if (is_member) { node->when_lost = 0; if (membership) { node->last_seen = membership; } } if (state && !pcmk__str_eq(node->state, state, pcmk__str_casei)) { char *last = node->state; if (is_member) { node->when_member = time(NULL); } else { node->when_member = 0; } node->state = strdup(state); crm_notice("Node %s state is now %s " CRM_XS " nodeid=%u previous=%s source=%s", node->uname, state, node->id, (last? last : "unknown"), source); if (peer_status_callback != NULL) { peer_status_callback(crm_status_nstate, node, last); } free(last); if (crm_autoreap && !is_member && !pcmk_is_set(node->flags, crm_remote_node)) { /* We only autoreap from the peer cache, not the remote peer cache, * because the latter should be managed only by * refresh_remote_nodes(). */ if(iter) { crm_notice("Purged 1 peer with " PCMK_XA_ID "=%u and/or uname=%s from the membership cache", node->id, node->uname); g_hash_table_iter_remove(iter); } else { pcmk__cluster_forget_cluster_node(node->id, node->uname); } node = NULL; } } else { crm_trace("Node %s state is unchanged (%s) " CRM_XS " nodeid=%u source=%s", node->uname, state, node->id, source); } return node; } /*! * \brief Update a node's state and membership information * * \param[in] source Caller's function name (for log messages) * \param[in,out] node Node object to update * \param[in] state Node's new state * \param[in] membership Node's new membership ID * * \return NULL if any node was reaped, value of node otherwise * * \note If this function returns NULL, the supplied node object was likely * freed and should not be used again. This function should not be * called within a cache iteration if reaping is possible, * otherwise reaping could invalidate the iterator. */ crm_node_t * pcmk__update_peer_state(const char *source, crm_node_t *node, const char *state, uint64_t membership) { return update_peer_state_iter(source, node, state, membership, NULL); } /*! * \internal * \brief Reap all nodes from cache whose membership information does not match * * \param[in] membership Membership ID of nodes to keep */ void pcmk__reap_unseen_nodes(uint64_t membership) { GHashTableIter iter; crm_node_t *node = NULL; crm_trace("Reaping unseen nodes..."); g_hash_table_iter_init(&iter, crm_peer_cache); while (g_hash_table_iter_next(&iter, NULL, (gpointer *)&node)) { if (node->last_seen != membership) { if (node->state) { /* * Calling update_peer_state_iter() allows us to * remove the node from crm_peer_cache without * invalidating our iterator */ update_peer_state_iter(__func__, node, CRM_NODE_LOST, membership, &iter); } else { crm_info("State of node %s[%u] is still unknown", node->uname, node->id); } } } } static crm_node_t * find_cib_cluster_node(const char *id, const char *uname) { GHashTableIter iter; crm_node_t *node = NULL; crm_node_t *by_id = NULL; crm_node_t *by_name = NULL; if (uname) { g_hash_table_iter_init(&iter, cluster_node_cib_cache); while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &node)) { if (node->uname && strcasecmp(node->uname, uname) == 0) { crm_trace("Name match: %s = %p", node->uname, node); by_name = node; break; } } } if (id) { g_hash_table_iter_init(&iter, cluster_node_cib_cache); while (g_hash_table_iter_next(&iter, NULL, (gpointer *) &node)) { if(strcasecmp(node->uuid, id) == 0) { crm_trace("ID match: %s= %p", id, node); by_id = node; break; } } } node = by_id; /* Good default */ if (by_id == by_name) { /* Nothing to do if they match (both NULL counts) */ crm_trace("Consistent: %p for %s/%s", by_id, id, uname); } else if (by_id == NULL && by_name) { crm_trace("Only one: %p for %s/%s", by_name, id, uname); if (id) { node = NULL; } else { node = by_name; } } else if (by_name == NULL && by_id) { crm_trace("Only one: %p for %s/%s", by_id, id, uname); if (uname) { node = NULL; } } else if (uname && by_id->uname && pcmk__str_eq(uname, by_id->uname, pcmk__str_casei)) { /* Multiple nodes have the same uname in the CIB. * Return by_id. */ } else if (id && by_name->uuid && pcmk__str_eq(id, by_name->uuid, pcmk__str_casei)) { /* Multiple nodes have the same id in the CIB. * Return by_name. */ node = by_name; } else { node = NULL; } if (node == NULL) { crm_debug("Couldn't find node%s%s%s%s", id? " " : "", id? id : "", uname? " with name " : "", uname? uname : ""); } return node; } static void cluster_node_cib_cache_refresh_helper(xmlNode *xml_node, void *user_data) { const char *id = crm_element_value(xml_node, PCMK_XA_ID); const char *uname = crm_element_value(xml_node, PCMK_XA_UNAME); crm_node_t * node = NULL; CRM_CHECK(id != NULL && uname !=NULL, return); node = find_cib_cluster_node(id, uname); if (node == NULL) { char *uniqueid = crm_generate_uuid(); node = pcmk__assert_alloc(1, sizeof(crm_node_t)); node->uname = pcmk__str_copy(uname); node->uuid = pcmk__str_copy(id); g_hash_table_replace(cluster_node_cib_cache, uniqueid, node); } else if (pcmk_is_set(node->flags, crm_node_dirty)) { pcmk__str_update(&node->uname, uname); /* Node is in cache and hasn't been updated already, so mark it clean */ clear_peer_flags(node, crm_node_dirty); } } static void refresh_cluster_node_cib_cache(xmlNode *cib) { pcmk__cluster_init_node_caches(); g_hash_table_foreach(cluster_node_cib_cache, mark_dirty, NULL); crm_foreach_xpath_result(cib, PCMK__XP_MEMBER_NODE_CONFIG, cluster_node_cib_cache_refresh_helper, NULL); // Remove all old cache entries that weren't seen in the CIB g_hash_table_foreach_remove(cluster_node_cib_cache, is_dirty, NULL); } void pcmk__refresh_node_caches_from_cib(xmlNode *cib) { refresh_remote_nodes(cib); refresh_cluster_node_cib_cache(cib); } // Deprecated functions kept only for backward API compatibility // LCOV_EXCL_START #include int crm_terminate_member(int nodeid, const char *uname, void *unused) { return stonith_api_kick(nodeid, uname, 120, TRUE); } int crm_terminate_member_no_mainloop(int nodeid, const char *uname, int *connection) { return stonith_api_kick(nodeid, uname, 120, TRUE); } crm_node_t * crm_get_peer(unsigned int id, const char *uname) { return pcmk__get_node(id, uname, NULL, pcmk__node_search_cluster_member); } crm_node_t * crm_get_peer_full(unsigned int id, const char *uname, int flags) { return pcmk__get_node(id, uname, NULL, flags); } int crm_remote_peer_cache_size(void) { unsigned int count = pcmk__cluster_num_remote_nodes(); return QB_MIN(count, INT_MAX); } void crm_remote_peer_cache_refresh(xmlNode *cib) { refresh_remote_nodes(cib); } crm_node_t * crm_remote_peer_get(const char *node_name) { return pcmk__cluster_lookup_remote_node(node_name); } void crm_remote_peer_cache_remove(const char *node_name) { pcmk__cluster_forget_remote_node(node_name); } gboolean crm_is_peer_active(const crm_node_t * node) { return pcmk__cluster_is_node_active(node); } guint crm_active_peers(void) { return pcmk__cluster_num_active_nodes(); } guint reap_crm_member(uint32_t id, const char *name) { int matches = 0; crm_node_t search = { 0, }; if (crm_peer_cache == NULL) { crm_trace("Membership cache not initialized, ignoring purge request"); return 0; } search.id = id; search.uname = pcmk__str_copy(name); matches = g_hash_table_foreach_remove(crm_peer_cache, should_forget_cluster_node, &search); if(matches) { crm_notice("Purged %d peer%s with " PCMK_XA_ID "=%u%s%s from the membership cache", matches, pcmk__plural_s(matches), search.id, (search.uname? " and/or uname=" : ""), (search.uname? search.uname : "")); } else { crm_info("No peers with " PCMK_XA_ID "=%u%s%s to purge from the membership cache", search.id, (search.uname? " and/or uname=" : ""), (search.uname? search.uname : "")); } free(search.uname); return matches; } void crm_peer_init(void) { pcmk__cluster_init_node_caches(); } void crm_peer_destroy(void) { pcmk__cluster_destroy_node_caches(); } // LCOV_EXCL_STOP // End deprecated API