diff --git a/daemons/based/based_messages.c b/daemons/based/based_messages.c index ad6e6a8ffd..fb9571ca0a 100644 --- a/daemons/based/based_messages.c +++ b/daemons/based/based_messages.c @@ -1,523 +1,523 @@ /* * 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 #include #include #include /* Maximum number of diffs to ignore while waiting for a resync */ #define MAX_DIFF_RETRY 5 bool based_is_primary = false; xmlNode *the_cib = NULL; int cib_process_shutdown_req(const char *op, int options, const char *section, xmlNode * req, xmlNode * input, xmlNode * existing_cib, xmlNode ** result_cib, xmlNode ** answer) { const char *host = crm_element_value(req, PCMK__XA_SRC); *answer = NULL; if (crm_element_value(req, PCMK__XA_CIB_ISREPLYTO) == NULL) { crm_info("Peer %s is requesting to shut down", host); return pcmk_ok; } if (cib_shutdown_flag == FALSE) { crm_err("Peer %s mistakenly thinks we wanted to shut down", host); return -EINVAL; } crm_info("Peer %s has acknowledged our shutdown request", host); terminate_cib(__func__, 0); return pcmk_ok; } // @COMPAT: Remove when PCMK__CIB_REQUEST_NOOP is removed int cib_process_noop(const char *op, int options, const char *section, xmlNode *req, xmlNode *input, xmlNode *existing_cib, xmlNode **result_cib, xmlNode **answer) { crm_trace("Processing \"%s\" event", op); *answer = NULL; return pcmk_ok; } int cib_process_readwrite(const char *op, int options, const char *section, xmlNode * req, xmlNode * input, xmlNode * existing_cib, xmlNode ** result_cib, xmlNode ** answer) { int result = pcmk_ok; crm_trace("Processing \"%s\" event", op); // @COMPAT Pacemaker Remote clients <3.0.0 may send this if (pcmk__str_eq(op, PCMK__CIB_REQUEST_IS_PRIMARY, pcmk__str_none)) { if (based_is_primary) { result = pcmk_ok; } else { result = -EPERM; } return result; } if (pcmk__str_eq(op, PCMK__CIB_REQUEST_PRIMARY, pcmk__str_none)) { if (!based_is_primary) { crm_info("We are now in R/W mode"); based_is_primary = true; } else { crm_debug("We are still in R/W mode"); } } else if (based_is_primary) { crm_info("We are now in R/O mode"); based_is_primary = false; } return result; } /* Set to 1 when a sync is requested, incremented when a diff is ignored, * reset to 0 when a sync is received */ static int sync_in_progress = 0; void send_sync_request(const char *host) { xmlNode *sync_me = pcmk__xe_create(NULL, "sync-me"); pcmk__node_status_t *peer = NULL; crm_info("Requesting re-sync from %s", (host? host : "all peers")); sync_in_progress = 1; crm_xml_add(sync_me, PCMK__XA_T, PCMK__VALUE_CIB); crm_xml_add(sync_me, PCMK__XA_CIB_OP, PCMK__CIB_REQUEST_SYNC_TO_ONE); crm_xml_add(sync_me, PCMK__XA_CIB_DELEGATED_FROM, OUR_NODENAME); if (host != NULL) { peer = pcmk__get_node(0, host, NULL, pcmk__node_search_cluster_member); } pcmk__cluster_send_message(peer, pcmk_ipc_based, sync_me); pcmk__xml_free(sync_me); } int cib_process_ping(const char *op, int options, const char *section, xmlNode * req, xmlNode * input, xmlNode * existing_cib, xmlNode ** result_cib, xmlNode ** answer) { const char *host = crm_element_value(req, PCMK__XA_SRC); const char *seq = crm_element_value(req, PCMK__XA_CIB_PING_ID); char *digest = pcmk__digest_xml(the_cib, true); xmlNode *wrapper = NULL; crm_trace("Processing \"%s\" event %s from %s", op, seq, host); *answer = pcmk__xe_create(NULL, PCMK__XE_PING_RESPONSE); crm_xml_add(*answer, PCMK_XA_CRM_FEATURE_SET, CRM_FEATURE_SET); crm_xml_add(*answer, PCMK__XA_DIGEST, digest); crm_xml_add(*answer, PCMK__XA_CIB_PING_ID, seq); wrapper = pcmk__xe_create(*answer, PCMK__XE_CIB_CALLDATA); if (the_cib != NULL) { pcmk__if_tracing( { /* Append additional detail so the receiver can log the * differences */ pcmk__xml_copy(wrapper, the_cib); }, { // Always include at least the version details const char *name = (const char *) the_cib->name; xmlNode *shallow = pcmk__xe_create(wrapper, name); pcmk__xe_copy_attrs(shallow, the_cib, pcmk__xaf_none); } ); } crm_info("Reporting our current digest to %s: %s for %s.%s.%s", host, digest, crm_element_value(existing_cib, PCMK_XA_ADMIN_EPOCH), crm_element_value(existing_cib, PCMK_XA_EPOCH), crm_element_value(existing_cib, PCMK_XA_NUM_UPDATES)); free(digest); return pcmk_ok; } int cib_process_sync(const char *op, int options, const char *section, xmlNode * req, xmlNode * input, xmlNode * existing_cib, xmlNode ** result_cib, xmlNode ** answer) { return sync_our_cib(req, TRUE); } int cib_process_upgrade_server(const char *op, int options, const char *section, xmlNode * req, xmlNode * input, xmlNode * existing_cib, xmlNode ** result_cib, xmlNode ** answer) { int rc = pcmk_ok; *answer = NULL; if (crm_element_value(req, PCMK__XA_CIB_SCHEMA_MAX) != NULL) { /* The originator of an upgrade request sends it to the DC, without * PCMK__XA_CIB_SCHEMA_MAX. If an upgrade is needed, the DC * re-broadcasts the request with PCMK__XA_CIB_SCHEMA_MAX, and each node * performs the upgrade (and notifies its local clients) here. */ return cib_process_upgrade( op, options, section, req, input, existing_cib, result_cib, answer); } else { xmlNode *scratch = pcmk__xml_copy(NULL, existing_cib); const char *host = crm_element_value(req, PCMK__XA_SRC); const char *original_schema = NULL; const char *new_schema = NULL; const char *client_id = crm_element_value(req, PCMK__XA_CIB_CLIENTID); const char *call_opts = crm_element_value(req, PCMK__XA_CIB_CALLOPT); const char *call_id = crm_element_value(req, PCMK__XA_CIB_CALLID); crm_trace("Processing \"%s\" event", op); original_schema = crm_element_value(existing_cib, PCMK_XA_VALIDATE_WITH); rc = pcmk__update_schema(&scratch, NULL, true, true); rc = pcmk_rc2legacy(rc); new_schema = crm_element_value(scratch, PCMK_XA_VALIDATE_WITH); if (pcmk__cmp_schemas_by_name(new_schema, original_schema) > 0) { xmlNode *up = pcmk__xe_create(NULL, __func__); rc = pcmk_ok; crm_notice("Upgrade request from %s verified", host); crm_xml_add(up, PCMK__XA_T, PCMK__VALUE_CIB); crm_xml_add(up, PCMK__XA_CIB_OP, PCMK__CIB_REQUEST_UPGRADE); crm_xml_add(up, PCMK__XA_CIB_SCHEMA_MAX, new_schema); crm_xml_add(up, PCMK__XA_CIB_DELEGATED_FROM, host); crm_xml_add(up, PCMK__XA_CIB_CLIENTID, client_id); crm_xml_add(up, PCMK__XA_CIB_CALLOPT, call_opts); crm_xml_add(up, PCMK__XA_CIB_CALLID, call_id); pcmk__cluster_send_message(NULL, pcmk_ipc_based, up); pcmk__xml_free(up); } else if(rc == pcmk_ok) { rc = -pcmk_err_schema_unchanged; } if (rc != pcmk_ok) { // Notify originating peer so it can notify its local clients pcmk__node_status_t *origin = NULL; origin = pcmk__search_node_caches(0, host, pcmk__node_search_cluster_member); crm_info("Rejecting upgrade request from %s: %s " QB_XS " rc=%d peer=%s", host, pcmk_strerror(rc), rc, (origin? origin->name : "lost")); if (origin) { xmlNode *up = pcmk__xe_create(NULL, __func__); crm_xml_add(up, PCMK__XA_T, PCMK__VALUE_CIB); crm_xml_add(up, PCMK__XA_CIB_OP, PCMK__CIB_REQUEST_UPGRADE); crm_xml_add(up, PCMK__XA_CIB_DELEGATED_FROM, host); crm_xml_add(up, PCMK__XA_CIB_ISREPLYTO, host); crm_xml_add(up, PCMK__XA_CIB_CLIENTID, client_id); crm_xml_add(up, PCMK__XA_CIB_CALLOPT, call_opts); crm_xml_add(up, PCMK__XA_CIB_CALLID, call_id); crm_xml_add_int(up, PCMK__XA_CIB_UPGRADE_RC, rc); if (!pcmk__cluster_send_message(origin, pcmk_ipc_based, up)) { crm_warn("Could not send CIB upgrade result to %s", host); } pcmk__xml_free(up); } } pcmk__xml_free(scratch); } return rc; } int cib_process_sync_one(const char *op, int options, const char *section, xmlNode * req, xmlNode * input, xmlNode * existing_cib, xmlNode ** result_cib, xmlNode ** answer) { return sync_our_cib(req, FALSE); } int cib_server_process_diff(const char *op, int options, const char *section, xmlNode * req, xmlNode * input, xmlNode * existing_cib, xmlNode ** result_cib, xmlNode ** answer) { int rc = pcmk_ok; if (sync_in_progress > MAX_DIFF_RETRY) { /* Don't ignore diffs forever; the last request may have been lost. * If the diff fails, we'll ask for another full resync. */ sync_in_progress = 0; } // The primary instance should never ignore a diff if (sync_in_progress && !based_is_primary) { int diff_add_updates = 0; int diff_add_epoch = 0; int diff_add_admin_epoch = 0; int diff_del_updates = 0; int diff_del_epoch = 0; int diff_del_admin_epoch = 0; cib_diff_version_details(input, &diff_add_admin_epoch, &diff_add_epoch, &diff_add_updates, &diff_del_admin_epoch, &diff_del_epoch, &diff_del_updates); sync_in_progress++; crm_notice("Not applying diff %d.%d.%d -> %d.%d.%d (sync in progress)", diff_del_admin_epoch, diff_del_epoch, diff_del_updates, diff_add_admin_epoch, diff_add_epoch, diff_add_updates); return -pcmk_err_diff_resync; } rc = cib_process_diff(op, options, section, req, input, existing_cib, result_cib, answer); crm_trace("result: %s (%d), %s", pcmk_strerror(rc), rc, (based_is_primary? "primary": "secondary")); if ((rc == -pcmk_err_diff_resync) && !based_is_primary) { pcmk__xml_free(*result_cib); *result_cib = NULL; send_sync_request(NULL); } else if (rc == -pcmk_err_diff_resync) { rc = -pcmk_err_diff_failed; if (options & cib_force_diff) { crm_warn("Not requesting full refresh in R/W mode"); } } return rc; } int cib_process_replace_svr(const char *op, int options, const char *section, xmlNode * req, xmlNode * input, xmlNode * existing_cib, xmlNode ** result_cib, xmlNode ** answer) { int rc = cib_process_replace(op, options, section, req, input, existing_cib, result_cib, answer); if ((rc == pcmk_ok) && pcmk__xe_is(input, PCMK_XE_CIB)) { sync_in_progress = 0; } return rc; } /* @COMPAT: Remove when PCMK__CIB_REQUEST_ABS_DELETE is removed - * (Clients on Pacemaker Remote nodes <3.0.0 can send it) + * (At least external client code <3.0.0 can send it) */ int cib_process_delete_absolute(const char *op, int options, const char *section, xmlNode * req, xmlNode * input, xmlNode * existing_cib, xmlNode ** result_cib, xmlNode ** answer) { return -EINVAL; } static xmlNode * cib_msg_copy(xmlNode *msg) { static const char *field_list[] = { PCMK__XA_T, PCMK__XA_CIB_CLIENTID, PCMK__XA_CIB_CALLOPT, PCMK__XA_CIB_CALLID, PCMK__XA_CIB_OP, PCMK__XA_CIB_ISREPLYTO, PCMK__XA_CIB_SECTION, PCMK__XA_CIB_HOST, PCMK__XA_CIB_RC, PCMK__XA_CIB_DELEGATED_FROM, PCMK__XA_CIB_UPDATE, PCMK__XA_CIB_CLIENTNAME, PCMK__XA_CIB_USER, PCMK__XA_CIB_NOTIFY_TYPE, PCMK__XA_CIB_NOTIFY_ACTIVATE, }; xmlNode *copy = pcmk__xe_create(NULL, PCMK__XE_COPY); for (int lpc = 0; lpc < PCMK__NELEM(field_list); lpc++) { const char *field = field_list[lpc]; const char *value = crm_element_value(msg, field); if (value != NULL) { crm_xml_add(copy, field, value); } } return copy; } int sync_our_cib(xmlNode * request, gboolean all) { int result = pcmk_ok; char *digest = NULL; const char *host = crm_element_value(request, PCMK__XA_SRC); const char *op = crm_element_value(request, PCMK__XA_CIB_OP); pcmk__node_status_t *peer = NULL; xmlNode *replace_request = NULL; xmlNode *wrapper = NULL; CRM_CHECK(the_cib != NULL, return -EINVAL); CRM_CHECK(all || (host != NULL), return -EINVAL); crm_debug("Syncing CIB to %s", all ? "all peers" : host); replace_request = cib_msg_copy(request); if (host != NULL) { crm_xml_add(replace_request, PCMK__XA_CIB_ISREPLYTO, host); } if (all) { pcmk__xe_remove_attr(replace_request, PCMK__XA_CIB_HOST); } crm_xml_add(replace_request, PCMK__XA_CIB_OP, PCMK__CIB_REQUEST_REPLACE); // @TODO Keep for tracing, or drop? crm_xml_add(replace_request, PCMK__XA_ORIGINAL_CIB_OP, op); pcmk__xe_set_bool_attr(replace_request, PCMK__XA_CIB_UPDATE, true); crm_xml_add(replace_request, PCMK_XA_CRM_FEATURE_SET, CRM_FEATURE_SET); digest = pcmk__digest_xml(the_cib, true); crm_xml_add(replace_request, PCMK__XA_DIGEST, digest); wrapper = pcmk__xe_create(replace_request, PCMK__XE_CIB_CALLDATA); pcmk__xml_copy(wrapper, the_cib); if (!all) { peer = pcmk__get_node(0, host, NULL, pcmk__node_search_cluster_member); } if (!pcmk__cluster_send_message(peer, pcmk_ipc_based, replace_request)) { result = -ENOTCONN; } pcmk__xml_free(replace_request); free(digest); return result; } int cib_process_commit_transaction(const char *op, int options, const char *section, xmlNode *req, xmlNode *input, xmlNode *existing_cib, xmlNode **result_cib, xmlNode **answer) { /* On success, our caller will activate *result_cib locally, trigger a * replace notification if appropriate, and sync *result_cib to all nodes. * On failure, our caller will free *result_cib. */ int rc = pcmk_rc_ok; const char *client_id = crm_element_value(req, PCMK__XA_CIB_CLIENTID); const char *origin = crm_element_value(req, PCMK__XA_SRC); pcmk__client_t *client = pcmk__find_client_by_id(client_id); rc = based_commit_transaction(input, client, origin, result_cib); if (rc != pcmk_rc_ok) { char *source = based_transaction_source_str(client, origin); crm_err("Could not commit transaction for %s: %s", source, pcmk_rc_str(rc)); free(source); } return pcmk_rc2legacy(rc); } int cib_process_schemas(const char *op, int options, const char *section, xmlNode *req, xmlNode *input, xmlNode *existing_cib, xmlNode **result_cib, xmlNode **answer) { xmlNode *wrapper = NULL; xmlNode *data = NULL; const char *after_ver = NULL; GList *schemas = NULL; GList *already_included = NULL; *answer = pcmk__xe_create(NULL, PCMK__XA_SCHEMAS); wrapper = pcmk__xe_first_child(req, PCMK__XE_CIB_CALLDATA, NULL, NULL); data = pcmk__xe_first_child(wrapper, NULL, NULL, NULL); if (data == NULL) { crm_warn("No data specified in request"); return -EPROTO; } after_ver = crm_element_value(data, PCMK_XA_VERSION); if (after_ver == NULL) { crm_warn("No version specified in request"); return -EPROTO; } /* The client requested all schemas after the latest one we know about, which * means the client is fully up-to-date. Return a properly formatted reply * with no schemas. */ if (pcmk__str_eq(after_ver, pcmk__highest_schema_name(), pcmk__str_none)) { return pcmk_ok; } schemas = pcmk__schema_files_later_than(after_ver); for (GList *iter = schemas; iter != NULL; iter = iter->next) { pcmk__build_schema_xml_node(*answer, iter->data, &already_included); } g_list_free_full(schemas, free); g_list_free_full(already_included, free); return pcmk_ok; }