diff --git a/crmd/cib.c b/crmd/cib.c index 40fed4a987..41f4f3d6e9 100644 --- a/crmd/cib.c +++ b/crmd/cib.c @@ -1,277 +1,272 @@ /* * Copyright (C) 2004 Andrew Beekhof * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This software is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include #include #include #include /* for access */ #include /* for calls to open */ #include /* for calls to open */ #include /* for calls to open */ #include /* for getpwuid */ #include /* for initgroups */ #include /* for getrlimit */ #include /* for getrlimit */ #include #include #include #include #include #include #include struct crm_subsystem_s *cib_subsystem = NULL; int cib_retries = 0; static void do_cib_updated(const char *event, xmlNode * msg) { int rc = -1; int format= 1; xmlNode *patchset = get_message_xml(msg, F_CIB_UPDATE_RESULT); xmlNode *change = NULL; xmlXPathObject *xpathObj = NULL; CRM_CHECK(msg != NULL, return); crm_element_value_int(msg, F_CIB_RC, &rc); if (rc < pcmk_ok) { crm_trace("Filter rc=%d (%s)", rc, pcmk_strerror(rc)); return; } crm_element_value_int(patchset, "format", &format); if (format == 1) { if ((xpathObj = xpath_search( msg, "//" F_CIB_UPDATE_RESULT "//" XML_TAG_DIFF_ADDED "//" XML_CIB_TAG_CRMCONFIG " | " \ "//" F_CIB_UPDATE_RESULT "//" XML_TAG_DIFF_ADDED "//" XML_CIB_TAG_ALERTS )) != NULL) { freeXpathObject(xpathObj); mainloop_set_trigger(config_read); } } else if (format == 2) { for (change = __xml_first_child(patchset); change != NULL; change = __xml_next(change)) { const char *xpath = crm_element_value(change, XML_DIFF_PATH); if (xpath == NULL) { continue; } /* modifying properties */ if (!strstr(xpath, "/" XML_TAG_CIB "/" XML_CIB_TAG_CONFIGURATION "/" XML_CIB_TAG_CRMCONFIG "/") && !strstr(xpath, "/" XML_TAG_CIB "/" XML_CIB_TAG_CONFIGURATION "/" XML_CIB_TAG_ALERTS)) { xmlNode *section = NULL; const char *name = NULL; /* adding notifications section */ if ((strcmp(xpath, "/" XML_TAG_CIB "/" XML_CIB_TAG_CONFIGURATION) != 0) || ((section = __xml_first_child(change)) == NULL) || ((name = crm_element_name(section)) == NULL) || (strcmp(name, XML_CIB_TAG_ALERTS) != 0)) { continue; } } mainloop_set_trigger(config_read); break; } } else { crm_warn("Unknown patch format: %d", format); } } static void revision_check_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void *user_data) { int cmp = -1; xmlNode *generation = NULL; const char *revision = NULL; if (rc != pcmk_ok) { fsa_data_t *msg_data = NULL; register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL); return; } generation = output; CRM_CHECK(safe_str_eq(crm_element_name(generation), XML_TAG_CIB), crm_log_xml_err(output, __FUNCTION__); return); crm_trace("Checking our feature revision is allowed: %s", CIB_FEATURE_SET); revision = crm_element_value(generation, XML_ATTR_CRM_VERSION); cmp = compare_version(revision, CRM_FEATURE_SET); if (cmp > 0) { crm_err("Shutting down because the current configuration is not supported by this version " CRM_XS " build=%s supported=%s current=%s", PACEMAKER_VERSION, CRM_FEATURE_SET, revision); /* go into a stall state */ register_fsa_error_adv(C_FSA_INTERNAL, I_SHUTDOWN, NULL, NULL, __FUNCTION__); return; } } static void do_cib_replaced(const char *event, xmlNode * msg) { crm_debug("Updating the CIB after a replace: DC=%s", AM_I_DC ? "true" : "false"); if (AM_I_DC == FALSE) { return; } else if (fsa_state == S_FINALIZE_JOIN && is_set(fsa_input_register, R_CIB_ASKED)) { /* no need to restart the join - we asked for this replace op */ return; } /* start the join process again so we get everyone's LRM status */ populate_cib_nodes(node_update_quick|node_update_all, __FUNCTION__); register_fsa_input(C_FSA_INTERNAL, I_ELECTION, NULL); } -/* A_CIB_STOP, A_CIB_START, A_CIB_RESTART, */ +/* A_CIB_STOP, A_CIB_START, O_CIB_RESTART */ void do_cib_control(long long action, enum crmd_fsa_cause cause, enum crmd_fsa_state cur_state, enum crmd_fsa_input current_input, fsa_data_t * msg_data) { - struct crm_subsystem_s *this_subsys = cib_subsystem; + CRM_ASSERT(fsa_cib_conn != NULL); - long long stop_actions = A_CIB_STOP; - long long start_actions = A_CIB_START; - - if (action & stop_actions) { + if (action & A_CIB_STOP) { if (fsa_cib_conn->state != cib_disconnected && last_resource_update != 0) { crm_info("Waiting for resource update %d to complete", last_resource_update); crmd_fsa_stall(FALSE); return; } crm_info("Disconnecting CIB"); clear_bit(fsa_input_register, R_CIB_CONNECTED); - CRM_ASSERT(fsa_cib_conn != NULL); fsa_cib_conn->cmds->del_notify_callback(fsa_cib_conn, T_CIB_DIFF_NOTIFY, do_cib_updated); if (fsa_cib_conn->state != cib_disconnected) { fsa_cib_conn->cmds->set_slave(fsa_cib_conn, cib_scope_local); fsa_cib_conn->cmds->signoff(fsa_cib_conn); } + crm_notice("Disconnected from the CIB"); } - if (action & start_actions) { + if (action & A_CIB_START) { int rc = pcmk_ok; - CRM_ASSERT(fsa_cib_conn != NULL); - if (cur_state == S_STOPPING) { - crm_err("Ignoring request to start %s after shutdown", this_subsys->name); + crm_err("Ignoring request to start the CIB after shutdown"); return; } rc = fsa_cib_conn->cmds->signon(fsa_cib_conn, CRM_SYSTEM_CRMD, cib_command_nonblocking); if (rc != pcmk_ok) { /* a short wait that usually avoids stalling the FSA */ sleep(1); rc = fsa_cib_conn->cmds->signon(fsa_cib_conn, CRM_SYSTEM_CRMD, cib_command_nonblocking); } if (rc != pcmk_ok) { crm_info("Could not connect to the CIB service: %s", pcmk_strerror(rc)); } else if (pcmk_ok != fsa_cib_conn->cmds->set_connection_dnotify(fsa_cib_conn, crmd_cib_connection_destroy)) { crm_err("Could not set dnotify callback"); } else if (pcmk_ok != fsa_cib_conn->cmds->add_notify_callback(fsa_cib_conn, T_CIB_REPLACE_NOTIFY, do_cib_replaced)) { crm_err("Could not set CIB notification callback (replace)"); } else if (pcmk_ok != fsa_cib_conn->cmds->add_notify_callback(fsa_cib_conn, T_CIB_DIFF_NOTIFY, do_cib_updated)) { crm_err("Could not set CIB notification callback (update)"); } else { set_bit(fsa_input_register, R_CIB_CONNECTED); } if (is_set(fsa_input_register, R_CIB_CONNECTED) == FALSE) { cib_retries++; crm_warn("Couldn't complete CIB registration %d" " times... pause and retry", cib_retries); if (cib_retries < 30) { crm_timer_start(wait_timer); crmd_fsa_stall(FALSE); } else { crm_err("Could not complete CIB" " registration %d times..." " hard error", cib_retries); register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL); } } else { int call_id = 0; crm_info("CIB connection established"); call_id = fsa_cib_conn->cmds->query(fsa_cib_conn, NULL, NULL, cib_scope_local); fsa_register_cib_callback(call_id, FALSE, NULL, revision_check_callback); cib_retries = 0; } } } /*! * \internal * \brief Get CIB call options to use local scope if master unavailable * * \return CIB call options */ int crmd_cib_smart_opt() { int call_opt = cib_quorum_override; if (fsa_state == S_ELECTION || fsa_state == S_PENDING) { crm_info("Sending update to local CIB in state: %s", fsa_state2string(fsa_state)); call_opt |= cib_scope_local; } return call_opt; } diff --git a/crmd/control.c b/crmd/control.c index af9c2c2f22..5d91b1d22c 100644 --- a/crmd/control.c +++ b/crmd/control.c @@ -1,1163 +1,1168 @@ /* * Copyright (C) 2004 Andrew Beekhof * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This software is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include qb_ipcs_service_t *ipcs = NULL; extern gboolean crm_connect_corosync(crm_cluster_t * cluster); extern void crmd_ha_connection_destroy(gpointer user_data); void crm_shutdown(int nsig); gboolean crm_read_options(gpointer user_data); gboolean fsa_has_quorum = FALSE; crm_trigger_t *fsa_source = NULL; crm_trigger_t *config_read = NULL; bool no_quorum_suicide_escalation = FALSE; static gboolean election_timeout_popped(gpointer data) { /* Not everyone voted */ crm_info("Election failed: Declaring ourselves the winner"); register_fsa_input(C_TIMER_POPPED, I_ELECTION_DC, NULL); return FALSE; } /* A_HA_CONNECT */ void do_ha_control(long long action, enum crmd_fsa_cause cause, enum crmd_fsa_state cur_state, enum crmd_fsa_input current_input, fsa_data_t * msg_data) { gboolean registered = FALSE; static crm_cluster_t *cluster = NULL; if (cluster == NULL) { cluster = calloc(1, sizeof(crm_cluster_t)); } if (action & A_HA_DISCONNECT) { crm_cluster_disconnect(cluster); crm_info("Disconnected from the cluster"); set_bit(fsa_input_register, R_HA_DISCONNECTED); } if (action & A_HA_CONNECT) { crm_set_status_callback(&peer_update_callback); crm_set_autoreap(FALSE); if (is_openais_cluster()) { #if SUPPORT_COROSYNC registered = crm_connect_corosync(cluster); #endif } else if (is_heartbeat_cluster()) { #if SUPPORT_HEARTBEAT cluster->destroy = crmd_ha_connection_destroy; cluster->hb_dispatch = crmd_ha_msg_callback; registered = crm_cluster_connect(cluster); fsa_cluster_conn = cluster->hb_conn; crm_trace("Be informed of Node Status changes"); if (registered && fsa_cluster_conn->llc_ops->set_nstatus_callback(fsa_cluster_conn, crmd_ha_status_callback, fsa_cluster_conn) != HA_OK) { crm_err("Cannot set nstatus callback: %s", fsa_cluster_conn->llc_ops->errmsg(fsa_cluster_conn)); registered = FALSE; } crm_trace("Be informed of CRM Client Status changes"); if (registered && fsa_cluster_conn->llc_ops->set_cstatus_callback(fsa_cluster_conn, crmd_client_status_callback, fsa_cluster_conn) != HA_OK) { crm_err("Cannot set cstatus callback: %s", fsa_cluster_conn->llc_ops->errmsg(fsa_cluster_conn)); registered = FALSE; } if (registered) { crm_trace("Requesting an initial dump of CRMD client_status"); fsa_cluster_conn->llc_ops->client_status(fsa_cluster_conn, NULL, CRM_SYSTEM_CRMD, -1); } #endif } fsa_election = election_init(NULL, cluster->uname, 60000/*60s*/, election_timeout_popped); fsa_our_uname = cluster->uname; fsa_our_uuid = cluster->uuid; if(cluster->uuid == NULL) { crm_err("Could not obtain local uuid"); registered = FALSE; } if (registered == FALSE) { set_bit(fsa_input_register, R_HA_DISCONNECTED); register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL); return; } populate_cib_nodes(node_update_none, __FUNCTION__); clear_bit(fsa_input_register, R_HA_DISCONNECTED); crm_info("Connected to the cluster"); } if (action & ~(A_HA_CONNECT | A_HA_DISCONNECT)) { crm_err("Unexpected action %s in %s", fsa_action2string(action), __FUNCTION__); } } static bool need_spawn_pengine_from_crmd(void) { static int result = -1; if (result != -1) return result; if (!is_heartbeat_cluster()) { result = 0; return result; } /* NULL, or "strange" value: rather spawn from here. */ result = TRUE; crm_str_to_boolean(daemon_option("crmd_spawns_pengine"), &result); return result; } /* A_SHUTDOWN */ void do_shutdown(long long action, enum crmd_fsa_cause cause, enum crmd_fsa_state cur_state, enum crmd_fsa_input current_input, fsa_data_t * msg_data) { /* just in case */ set_bit(fsa_input_register, R_SHUTDOWN); if (need_spawn_pengine_from_crmd()) { if (is_set(fsa_input_register, pe_subsystem->flag_connected)) { crm_info("Terminating the %s", pe_subsystem->name); if (stop_subsystem(pe_subsystem, TRUE) == FALSE) { /* its gone... */ crm_err("Faking %s exit", pe_subsystem->name); clear_bit(fsa_input_register, pe_subsystem->flag_connected); } else { crm_info("Waiting for subsystems to exit"); crmd_fsa_stall(FALSE); } } crm_info("All subsystems stopped, continuing"); } if (stonith_api) { /* Prevent it from coming up again */ clear_bit(fsa_input_register, R_ST_REQUIRED); crm_info("Disconnecting STONITH..."); stonith_api->cmds->disconnect(stonith_api); } } /* A_SHUTDOWN_REQ */ void do_shutdown_req(long long action, enum crmd_fsa_cause cause, enum crmd_fsa_state cur_state, enum crmd_fsa_input current_input, fsa_data_t * msg_data) { xmlNode *msg = NULL; set_bit(fsa_input_register, R_SHUTDOWN); crm_info("Sending shutdown request to all peers (DC is %s)", (fsa_our_dc? fsa_our_dc : "not set")); msg = create_request(CRM_OP_SHUTDOWN_REQ, NULL, NULL, CRM_SYSTEM_CRMD, CRM_SYSTEM_CRMD, NULL); /* set_bit(fsa_input_register, R_STAYDOWN); */ if (send_cluster_message(NULL, crm_msg_crmd, msg, TRUE) == FALSE) { register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL); } free_xml(msg); } extern crm_ipc_t *attrd_ipc; extern char *max_generation_from; extern xmlNode *max_generation_xml; extern GHashTable *resource_history; extern GHashTable *voted; extern GHashTable *metadata_hash; extern char *te_client_id; void log_connected_client(gpointer key, gpointer value, gpointer user_data); void log_connected_client(gpointer key, gpointer value, gpointer user_data) { crm_client_t *client = value; crm_err("%s is still connected at exit", crm_client_name(client)); } int crmd_fast_exit(int rc) { if (is_set(fsa_input_register, R_STAYDOWN)) { crm_warn("Inhibiting respawn "CRM_XS" remapping exit code %d to %d", rc, DAEMON_RESPAWN_STOP); rc = DAEMON_RESPAWN_STOP; } if (rc == pcmk_ok && is_set(fsa_input_register, R_IN_RECOVERY)) { crm_err("Could not recover from internal error"); rc = pcmk_err_generic; } return crm_exit(rc); } int crmd_exit(int rc) { GListPtr gIter = NULL; GMainLoop *mloop = crmd_mainloop; static bool in_progress = FALSE; if(in_progress && rc == 0) { crm_debug("Exit is already in progress"); return rc; } else if(in_progress) { crm_notice("Error during shutdown process, terminating now with status %d: %s", rc, pcmk_strerror(rc)); crm_write_blackbox(SIGTRAP, NULL); crmd_fast_exit(rc); } in_progress = TRUE; crm_trace("Preparing to exit: %d", rc); /* Suppress secondary errors resulting from us disconnecting everything */ set_bit(fsa_input_register, R_HA_DISCONNECTED); /* Close all IPC servers and clients to ensure any and all shared memory files are cleaned up */ if(ipcs) { crm_trace("Closing IPC server"); mainloop_del_ipc_server(ipcs); ipcs = NULL; } if (attrd_ipc) { crm_trace("Closing attrd connection"); crm_ipc_close(attrd_ipc); crm_ipc_destroy(attrd_ipc); attrd_ipc = NULL; } if (pe_subsystem && pe_subsystem->client && pe_subsystem->client->ipcs) { crm_trace("Disconnecting Policy Engine"); qb_ipcs_disconnect(pe_subsystem->client->ipcs); } if(stonith_api) { crm_trace("Disconnecting fencing API"); clear_bit(fsa_input_register, R_ST_REQUIRED); stonith_api->cmds->free(stonith_api); stonith_api = NULL; } if (rc == pcmk_ok && crmd_mainloop == NULL) { crm_debug("No mainloop detected"); rc = EPROTO; } /* On an error, just get out. * * Otherwise, make the effort to have mainloop exit gracefully so * that it (mostly) cleans up after itself and valgrind has less * to report on - allowing real errors stand out */ if(rc != pcmk_ok) { crm_notice("Forcing immediate exit with status %d: %s", rc, pcmk_strerror(rc)); crm_write_blackbox(SIGTRAP, NULL); return crmd_fast_exit(rc); } /* Clean up as much memory as possible for valgrind */ for (gIter = fsa_message_queue; gIter != NULL; gIter = gIter->next) { fsa_data_t *fsa_data = gIter->data; crm_info("Dropping %s: [ state=%s cause=%s origin=%s ]", fsa_input2string(fsa_data->fsa_input), fsa_state2string(fsa_state), fsa_cause2string(fsa_data->fsa_cause), fsa_data->origin); delete_fsa_input(fsa_data); } clear_bit(fsa_input_register, R_MEMBERSHIP); g_list_free(fsa_message_queue); fsa_message_queue = NULL; free(pe_subsystem); pe_subsystem = NULL; free(te_subsystem); te_subsystem = NULL; free(cib_subsystem); cib_subsystem = NULL; if (metadata_hash) { crm_trace("Destroying reload cache with %d members", g_hash_table_size(metadata_hash)); g_hash_table_destroy(metadata_hash); metadata_hash = NULL; } election_fini(fsa_election); fsa_election = NULL; - cib_delete(fsa_cib_conn); - fsa_cib_conn = NULL; + /* Tear down the CIB connection, but don't free it yet -- it could be used + * when we drain the mainloop later. + */ + cib_free_callbacks(fsa_cib_conn); + fsa_cib_conn->cmds->signoff(fsa_cib_conn); verify_stopped(fsa_state, LOG_WARNING); clear_bit(fsa_input_register, R_LRM_CONNECTED); lrm_state_destroy_all(); /* This basically will not work, since mainloop has a reference to it */ mainloop_destroy_trigger(fsa_source); fsa_source = NULL; mainloop_destroy_trigger(config_read); config_read = NULL; mainloop_destroy_trigger(stonith_reconnect); stonith_reconnect = NULL; mainloop_destroy_trigger(transition_trigger); transition_trigger = NULL; crm_client_cleanup(); crm_peer_destroy(); crm_timer_stop(transition_timer); crm_timer_stop(integration_timer); crm_timer_stop(finalization_timer); crm_timer_stop(election_trigger); election_timeout_stop(fsa_election); crm_timer_stop(shutdown_escalation_timer); crm_timer_stop(wait_timer); crm_timer_stop(recheck_timer); free(transition_timer); transition_timer = NULL; free(integration_timer); integration_timer = NULL; free(finalization_timer); finalization_timer = NULL; free(election_trigger); election_trigger = NULL; - election_fini(fsa_election); free(shutdown_escalation_timer); shutdown_escalation_timer = NULL; free(wait_timer); wait_timer = NULL; free(recheck_timer); recheck_timer = NULL; free(fsa_our_dc_version); fsa_our_dc_version = NULL; free(fsa_our_uname); fsa_our_uname = NULL; free(fsa_our_uuid); fsa_our_uuid = NULL; free(fsa_our_dc); fsa_our_dc = NULL; free(fsa_cluster_name); fsa_cluster_name = NULL; free(te_uuid); te_uuid = NULL; free(te_client_id); te_client_id = NULL; free(fsa_pe_ref); fsa_pe_ref = NULL; free(failed_stop_offset); failed_stop_offset = NULL; free(failed_start_offset); failed_start_offset = NULL; free(max_generation_from); max_generation_from = NULL; free_xml(max_generation_xml); max_generation_xml = NULL; mainloop_destroy_signal(SIGPIPE); mainloop_destroy_signal(SIGUSR1); mainloop_destroy_signal(SIGTERM); mainloop_destroy_signal(SIGTRAP); /* leave SIGCHLD engaged as we might still want to drain some service-actions */ if (mloop) { GMainContext *ctx = g_main_loop_get_context(crmd_mainloop); /* Don't re-enter this block */ crmd_mainloop = NULL; crmd_drain_alerts(ctx); /* no signals on final draining anymore */ mainloop_destroy_signal(SIGCHLD); crm_trace("Draining mainloop %d %d", g_main_loop_is_running(mloop), g_main_context_pending(ctx)); { int lpc = 0; while((g_main_context_pending(ctx) && lpc < 10)) { lpc++; crm_trace("Iteration %d", lpc); g_main_context_dispatch(ctx); } } crm_trace("Closing mainloop %d %d", g_main_loop_is_running(mloop), g_main_context_pending(ctx)); g_main_loop_quit(mloop); #if SUPPORT_HEARTBEAT /* Do this only after g_main_loop_quit(). * * This interface was broken (incomplete) since it was introduced. * ->delete() does cleanup and free most of it, but it does not * actually remove and destroy the corresponding GSource, so the next * prepare/check iteratioin would find a corrupt (because partially * freed) GSource, and segfault. * * Apparently one was supposed to store the GSource as returned by * G_main_add_ll_cluster(), and g_source_destroy() that "by hand". * * But no-one ever did this, not even in the old hb code when this was * introduced. * * Note that fsa_cluster_conn was set as an "alias" to cluster->hb_conn * in do_ha_control() right after crm_cluster_connect(), and only * happens to still point at that object, because do_ha_control() does * not reset it to NULL after crm_cluster_disconnect() above does * reset cluster->hb_conn to NULL. * Not sure if that's something to cleanup, too. * * I'll try to fix this up in heartbeat proper, so ->delete * will actually remove, and destroy, and unref, and free this thing. * Doing so after g_main_loop_quit() is valid with both old, * and eventually fixed heartbeat. * * If we introduce the "by hand" destroy/remove/unref, * this may break again once heartbeat is fixed :-( * * -- Lars Ellenberg */ if (fsa_cluster_conn) { crm_trace("Deleting heartbeat api object"); fsa_cluster_conn->llc_ops->delete(fsa_cluster_conn); fsa_cluster_conn = NULL; } #endif /* Won't do anything yet, since we're inside it now */ g_main_loop_unref(mloop); crm_trace("Done %d", rc); } else { mainloop_destroy_signal(SIGCHLD); } + cib_delete(fsa_cib_conn); + fsa_cib_conn = NULL; + /* Graceful */ return rc; } /* A_EXIT_0, A_EXIT_1 */ void do_exit(long long action, enum crmd_fsa_cause cause, enum crmd_fsa_state cur_state, enum crmd_fsa_input current_input, fsa_data_t * msg_data) { int exit_code = pcmk_ok; int log_level = LOG_INFO; const char *exit_type = "gracefully"; if (action & A_EXIT_1) { /* exit_code = pcmk_err_generic; */ log_level = LOG_ERR; exit_type = "forcefully"; exit_code = pcmk_err_generic; } verify_stopped(cur_state, LOG_ERR); do_crm_log(log_level, "Performing %s - %s exiting the CRMd", fsa_action2string(action), exit_type); crm_info("[%s] stopped (%d)", crm_system_name, exit_code); crmd_exit(exit_code); } static void sigpipe_ignore(int nsig) { return; } /* A_STARTUP */ void do_startup(long long action, enum crmd_fsa_cause cause, enum crmd_fsa_state cur_state, enum crmd_fsa_input current_input, fsa_data_t * msg_data) { int was_error = 0; crm_debug("Registering Signal Handlers"); mainloop_add_signal(SIGTERM, crm_shutdown); mainloop_add_signal(SIGPIPE, sigpipe_ignore); fsa_source = mainloop_add_trigger(G_PRIORITY_HIGH, crm_fsa_trigger, NULL); config_read = mainloop_add_trigger(G_PRIORITY_HIGH, crm_read_options, NULL); transition_trigger = mainloop_add_trigger(G_PRIORITY_LOW, te_graph_trigger, NULL); crm_debug("Creating CIB and LRM objects"); fsa_cib_conn = cib_new(); lrm_state_init_local(); /* set up the timers */ transition_timer = calloc(1, sizeof(fsa_timer_t)); integration_timer = calloc(1, sizeof(fsa_timer_t)); finalization_timer = calloc(1, sizeof(fsa_timer_t)); election_trigger = calloc(1, sizeof(fsa_timer_t)); shutdown_escalation_timer = calloc(1, sizeof(fsa_timer_t)); wait_timer = calloc(1, sizeof(fsa_timer_t)); recheck_timer = calloc(1, sizeof(fsa_timer_t)); if (election_trigger != NULL) { election_trigger->source_id = 0; election_trigger->period_ms = -1; election_trigger->fsa_input = I_DC_TIMEOUT; election_trigger->callback = crm_timer_popped; election_trigger->repeat = FALSE; } else { was_error = TRUE; } if (transition_timer != NULL) { transition_timer->source_id = 0; transition_timer->period_ms = -1; transition_timer->fsa_input = I_PE_CALC; transition_timer->callback = crm_timer_popped; transition_timer->repeat = FALSE; } else { was_error = TRUE; } if (integration_timer != NULL) { integration_timer->source_id = 0; integration_timer->period_ms = -1; integration_timer->fsa_input = I_INTEGRATED; integration_timer->callback = crm_timer_popped; integration_timer->repeat = FALSE; } else { was_error = TRUE; } if (finalization_timer != NULL) { finalization_timer->source_id = 0; finalization_timer->period_ms = -1; finalization_timer->fsa_input = I_FINALIZED; finalization_timer->callback = crm_timer_popped; finalization_timer->repeat = FALSE; /* for possible enabling... a bug in the join protocol left * a slave in S_PENDING while we think its in S_NOT_DC * * raising I_FINALIZED put us into a transition loop which is * never resolved. * in this loop we continually send probes which the node * NACK's because its in S_PENDING * * if we have nodes where heartbeat is active but the * CRM is not... then this will be handled in the * integration phase */ finalization_timer->fsa_input = I_ELECTION; } else { was_error = TRUE; } if (shutdown_escalation_timer != NULL) { shutdown_escalation_timer->source_id = 0; shutdown_escalation_timer->period_ms = -1; shutdown_escalation_timer->fsa_input = I_STOP; shutdown_escalation_timer->callback = crm_timer_popped; shutdown_escalation_timer->repeat = FALSE; } else { was_error = TRUE; } if (wait_timer != NULL) { wait_timer->source_id = 0; wait_timer->period_ms = 2000; wait_timer->fsa_input = I_NULL; wait_timer->callback = crm_timer_popped; wait_timer->repeat = FALSE; } else { was_error = TRUE; } if (recheck_timer != NULL) { recheck_timer->source_id = 0; recheck_timer->period_ms = -1; recheck_timer->fsa_input = I_PE_CALC; recheck_timer->callback = crm_timer_popped; recheck_timer->repeat = FALSE; } else { was_error = TRUE; } /* set up the sub systems */ cib_subsystem = calloc(1, sizeof(struct crm_subsystem_s)); te_subsystem = calloc(1, sizeof(struct crm_subsystem_s)); pe_subsystem = calloc(1, sizeof(struct crm_subsystem_s)); if (cib_subsystem != NULL) { cib_subsystem->pid = -1; cib_subsystem->name = CRM_SYSTEM_CIB; cib_subsystem->flag_connected = R_CIB_CONNECTED; cib_subsystem->flag_required = R_CIB_REQUIRED; } else { was_error = TRUE; } if (te_subsystem != NULL) { te_subsystem->pid = -1; te_subsystem->name = CRM_SYSTEM_TENGINE; te_subsystem->flag_connected = R_TE_CONNECTED; te_subsystem->flag_required = R_TE_REQUIRED; } else { was_error = TRUE; } if (pe_subsystem != NULL) { pe_subsystem->pid = -1; pe_subsystem->path = CRM_DAEMON_DIR; pe_subsystem->name = CRM_SYSTEM_PENGINE; pe_subsystem->command = CRM_DAEMON_DIR "/" CRM_SYSTEM_PENGINE; pe_subsystem->args = NULL; pe_subsystem->flag_connected = R_PE_CONNECTED; pe_subsystem->flag_required = R_PE_REQUIRED; } else { was_error = TRUE; } if (was_error == FALSE && need_spawn_pengine_from_crmd()) { if (start_subsystem(pe_subsystem) == FALSE) { was_error = TRUE; } } if (was_error) { register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL); } } static int32_t crmd_ipc_accept(qb_ipcs_connection_t * c, uid_t uid, gid_t gid) { crm_trace("Connection %p", c); if (crm_client_new(c, uid, gid) == NULL) { return -EIO; } return 0; } static void crmd_ipc_created(qb_ipcs_connection_t * c) { crm_trace("Connection %p", c); } static int32_t crmd_ipc_dispatch(qb_ipcs_connection_t * c, void *data, size_t size) { uint32_t id = 0; uint32_t flags = 0; crm_client_t *client = crm_client_get(c); xmlNode *msg = crm_ipcs_recv(client, data, size, &id, &flags); crm_trace("Invoked: %s", crm_client_name(client)); crm_ipcs_send_ack(client, id, flags, "ack", __FUNCTION__, __LINE__); if (msg == NULL) { return 0; } #if ENABLE_ACL CRM_ASSERT(client->user != NULL); crm_acl_get_set_user(msg, F_CRM_USER, client->user); #endif crm_trace("Processing msg from %s", crm_client_name(client)); crm_log_xml_trace(msg, "CRMd[inbound]"); crm_xml_add(msg, F_CRM_SYS_FROM, client->id); if (crmd_authorize_message(msg, client, NULL)) { route_message(C_IPC_MESSAGE, msg); } trigger_fsa(fsa_source); free_xml(msg); return 0; } static int32_t crmd_ipc_closed(qb_ipcs_connection_t * c) { crm_client_t *client = crm_client_get(c); struct crm_subsystem_s *the_subsystem = NULL; if (client == NULL) { return 0; } crm_trace("Connection %p", c); if (client->userdata == NULL) { crm_trace("Client hadn't registered with us yet"); } else if (strcasecmp(CRM_SYSTEM_PENGINE, client->userdata) == 0) { the_subsystem = pe_subsystem; } else if (strcasecmp(CRM_SYSTEM_TENGINE, client->userdata) == 0) { the_subsystem = te_subsystem; } else if (strcasecmp(CRM_SYSTEM_CIB, client->userdata) == 0) { the_subsystem = cib_subsystem; } if (the_subsystem != NULL) { the_subsystem->source = NULL; the_subsystem->client = NULL; crm_info("Received HUP from %s:[%d]", the_subsystem->name, the_subsystem->pid); } else { /* else that was a transient client */ crm_trace("Received HUP from transient client"); } crm_trace("Disconnecting client %s (%p)", crm_client_name(client), client); free(client->userdata); crm_client_destroy(client); trigger_fsa(fsa_source); return 0; } static void crmd_ipc_destroy(qb_ipcs_connection_t * c) { crm_trace("Connection %p", c); crmd_ipc_closed(c); } /* A_STOP */ void do_stop(long long action, enum crmd_fsa_cause cause, enum crmd_fsa_state cur_state, enum crmd_fsa_input current_input, fsa_data_t * msg_data) { crm_trace("Closing IPC server"); mainloop_del_ipc_server(ipcs); ipcs = NULL; register_fsa_input(C_FSA_INTERNAL, I_TERMINATE, NULL); } /* A_STARTED */ void do_started(long long action, enum crmd_fsa_cause cause, enum crmd_fsa_state cur_state, enum crmd_fsa_input current_input, fsa_data_t * msg_data) { static struct qb_ipcs_service_handlers crmd_callbacks = { .connection_accept = crmd_ipc_accept, .connection_created = crmd_ipc_created, .msg_process = crmd_ipc_dispatch, .connection_closed = crmd_ipc_closed, .connection_destroyed = crmd_ipc_destroy }; if (cur_state != S_STARTING) { crm_err("Start cancelled... %s", fsa_state2string(cur_state)); return; } else if (is_set(fsa_input_register, R_MEMBERSHIP) == FALSE) { crm_info("Delaying start, no membership data (%.16llx)", R_MEMBERSHIP); crmd_fsa_stall(TRUE); return; } else if (is_set(fsa_input_register, R_LRM_CONNECTED) == FALSE) { crm_info("Delaying start, LRM not connected (%.16llx)", R_LRM_CONNECTED); crmd_fsa_stall(TRUE); return; } else if (is_set(fsa_input_register, R_CIB_CONNECTED) == FALSE) { crm_info("Delaying start, CIB not connected (%.16llx)", R_CIB_CONNECTED); crmd_fsa_stall(TRUE); return; } else if (is_set(fsa_input_register, R_READ_CONFIG) == FALSE) { crm_info("Delaying start, Config not read (%.16llx)", R_READ_CONFIG); crmd_fsa_stall(TRUE); return; } else if (is_set(fsa_input_register, R_PEER_DATA) == FALSE) { /* try reading from HA */ crm_info("Delaying start, No peer data (%.16llx)", R_PEER_DATA); #if SUPPORT_HEARTBEAT if (is_heartbeat_cluster()) { HA_Message *msg = NULL; crm_trace("Looking for a HA message"); msg = fsa_cluster_conn->llc_ops->readmsg(fsa_cluster_conn, 0); if (msg != NULL) { crm_trace("There was a HA message"); ha_msg_del(msg); } } #endif crmd_fsa_stall(TRUE); return; } crm_debug("Init server comms"); ipcs = crmd_ipc_server_init(&crmd_callbacks); if (ipcs == NULL) { crm_err("Failed to create IPC server: shutting down and inhibiting respawn"); register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL); } if (stonith_reconnect == NULL) { int dummy; stonith_reconnect = mainloop_add_trigger(G_PRIORITY_LOW, te_connect_stonith, &dummy); } set_bit(fsa_input_register, R_ST_REQUIRED); mainloop_set_trigger(stonith_reconnect); crm_notice("The local CRM is operational"); clear_bit(fsa_input_register, R_STARTING); register_fsa_input(msg_data->fsa_cause, I_PENDING, NULL); } /* A_RECOVER */ void do_recover(long long action, enum crmd_fsa_cause cause, enum crmd_fsa_state cur_state, enum crmd_fsa_input current_input, fsa_data_t * msg_data) { set_bit(fsa_input_register, R_IN_RECOVERY); crm_warn("Fast-tracking shutdown in response to errors"); register_fsa_input(C_FSA_INTERNAL, I_TERMINATE, NULL); } /* *INDENT-OFF* */ pe_cluster_option crmd_opts[] = { /* name, old-name, validate, values, default, short description, long description */ { "dc-version", NULL, "string", NULL, "none", NULL, "Version of Pacemaker on the cluster's DC.", "Includes the hash which identifies the exact changeset it was built from. Used for diagnostic purposes." }, { "cluster-infrastructure", NULL, "string", NULL, "heartbeat", NULL, "The messaging stack on which Pacemaker is currently running.", "Used for informational and diagnostic purposes." }, { XML_CONFIG_ATTR_DC_DEADTIME, "dc_deadtime", "time", NULL, "20s", &check_time, "How long to wait for a response from other nodes during startup.", "The \"correct\" value will depend on the speed/load of your network and the type of switches used." }, { XML_CONFIG_ATTR_RECHECK, "cluster_recheck_interval", "time", "Zero disables polling. Positive values are an interval in seconds (unless other SI units are specified. eg. 5min)", "15min", &check_timer, "Polling interval for time based changes to options, resource parameters and constraints.", "The Cluster is primarily event driven, however the configuration can have elements that change based on time." " To ensure these changes take effect, we can optionally poll the cluster's status for changes." }, #ifdef RHEL7_COMPAT /* These options were superseded by the alerts feature and now are just an * alternate interface to it. It was never released upstream, but was * released in RHEL 7, so we allow it to be enabled at compile-time by * defining RHEL7_COMPAT. */ { "notification-agent", NULL, "string", NULL, "/dev/null", &check_script, "Deprecated", "Use alert path in alerts section instead" }, { "notification-recipient", NULL, "string", NULL, "", NULL, "Deprecated", "Use recipient value in alerts section instead" }, #endif { "load-threshold", NULL, "percentage", NULL, "80%", &check_utilization, "The maximum amount of system resources that should be used by nodes in the cluster", "The cluster will slow down its recovery process when the amount of system resources used" " (currently CPU) approaches this limit", }, { "node-action-limit", NULL, "integer", NULL, "0", &check_number, "The maximum number of jobs that can be scheduled per node. Defaults to 2x cores"}, { XML_CONFIG_ATTR_ELECTION_FAIL, "election_timeout", "time", NULL, "2min", &check_timer, "*** Advanced Use Only ***.", "If need to adjust this value, it probably indicates the presence of a bug." }, { XML_CONFIG_ATTR_FORCE_QUIT, "shutdown_escalation", "time", NULL, "20min", &check_timer, "*** Advanced Use Only ***.", "If need to adjust this value, it probably indicates the presence of a bug." }, { "crmd-integration-timeout", NULL, "time", NULL, "3min", &check_timer, "*** Advanced Use Only ***.", "If need to adjust this value, it probably indicates the presence of a bug." }, { "crmd-finalization-timeout", NULL, "time", NULL, "30min", &check_timer, "*** Advanced Use Only ***.", "If you need to adjust this value, it probably indicates the presence of a bug." }, { "crmd-transition-delay", NULL, "time", NULL, "0s", &check_timer, "*** Advanced Use Only ***\n" "Enabling this option will slow down cluster recovery under all conditions", "Delay cluster recovery for the configured interval to allow for additional/related events to occur.\n" "Useful if your configuration is sensitive to the order in which ping updates arrive." }, { "stonith-watchdog-timeout", NULL, "time", NULL, NULL, &check_sbd_timeout, "How long to wait before we can assume nodes are safely down", NULL }, { "stonith-max-attempts",NULL,"integer",NULL,"10",&check_positive_number, "How many times stonith can fail before it will no longer be attempted on a target" }, { "no-quorum-policy", "no_quorum_policy", "enum", "stop, freeze, ignore, suicide", "stop", &check_quorum, NULL, NULL }, #if SUPPORT_PLUGIN { XML_ATTR_EXPECTED_VOTES, NULL, "integer", NULL, "2", &check_number, "The number of nodes expected to be in the cluster", "Used to calculate quorum in openais based clusters." }, #endif }; /* *INDENT-ON* */ void crmd_metadata(void) { config_metadata("CRM Daemon", "1.0", "CRM Daemon Options", "This is a fake resource that details the options that can be configured for the CRM Daemon.", crmd_opts, DIMOF(crmd_opts)); } static void verify_crmd_options(GHashTable * options) { verify_all_options(options, crmd_opts, DIMOF(crmd_opts)); } static const char * crmd_pref(GHashTable * options, const char *name) { return get_cluster_pref(options, crmd_opts, DIMOF(crmd_opts), name); } static void config_query_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void *user_data) { #ifdef RHEL7_COMPAT const char *script = NULL; #endif const char *value = NULL; GHashTable *config_hash = NULL; crm_time_t *now = crm_time_new(NULL); xmlNode *crmconfig = NULL; xmlNode *alerts = NULL; if (rc != pcmk_ok) { fsa_data_t *msg_data = NULL; crm_err("Local CIB query resulted in an error: %s", pcmk_strerror(rc)); register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL); if (rc == -EACCES || rc == -pcmk_err_schema_validation) { crm_err("The cluster is mis-configured - shutting down and staying down"); set_bit(fsa_input_register, R_STAYDOWN); } goto bail; } crmconfig = output; if ((crmconfig) && (crm_element_name(crmconfig)) && (strcmp(crm_element_name(crmconfig), XML_CIB_TAG_CRMCONFIG) != 0)) { crmconfig = first_named_child(crmconfig, XML_CIB_TAG_CRMCONFIG); } if (!crmconfig) { fsa_data_t *msg_data = NULL; crm_err("Local CIB query for " XML_CIB_TAG_CRMCONFIG " section failed"); register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL); goto bail; } crm_debug("Call %d : Parsing CIB options", call_id); config_hash = g_hash_table_new_full(crm_str_hash, g_str_equal, g_hash_destroy_str, g_hash_destroy_str); unpack_instance_attributes(crmconfig, crmconfig, XML_CIB_TAG_PROPSET, NULL, config_hash, CIB_OPTIONS_FIRST, FALSE, now); verify_crmd_options(config_hash); #ifdef RHEL7_COMPAT script = crmd_pref(config_hash, "notification-agent"); value = crmd_pref(config_hash, "notification-recipient"); crmd_enable_alerts(script, value); #endif value = crmd_pref(config_hash, XML_CONFIG_ATTR_DC_DEADTIME); election_trigger->period_ms = crm_get_msec(value); value = crmd_pref(config_hash, "node-action-limit"); /* Also checks migration-limit */ throttle_update_job_max(value); value = crmd_pref(config_hash, "load-threshold"); if(value) { throttle_set_load_target(strtof(value, NULL) / 100.0); } value = crmd_pref(config_hash, "no-quorum-policy"); if (safe_str_eq(value, "suicide") && pcmk_locate_sbd()) { no_quorum_suicide_escalation = TRUE; } value = crmd_pref(config_hash,"stonith-max-attempts"); update_stonith_max_attempts(value); value = crmd_pref(config_hash, XML_CONFIG_ATTR_FORCE_QUIT); shutdown_escalation_timer->period_ms = crm_get_msec(value); /* How long to declare an election over - even if not everyone voted */ crm_debug("Shutdown escalation occurs after: %dms", shutdown_escalation_timer->period_ms); value = crmd_pref(config_hash, XML_CONFIG_ATTR_ELECTION_FAIL); election_timeout_set_period(fsa_election, crm_get_msec(value)); value = crmd_pref(config_hash, XML_CONFIG_ATTR_RECHECK); recheck_timer->period_ms = crm_get_msec(value); crm_debug("Checking for expired actions every %dms", recheck_timer->period_ms); value = crmd_pref(config_hash, "crmd-transition-delay"); transition_timer->period_ms = crm_get_msec(value); value = crmd_pref(config_hash, "crmd-integration-timeout"); integration_timer->period_ms = crm_get_msec(value); value = crmd_pref(config_hash, "crmd-finalization-timeout"); finalization_timer->period_ms = crm_get_msec(value); #if SUPPORT_COROSYNC if (is_classic_ais_cluster()) { value = crmd_pref(config_hash, XML_ATTR_EXPECTED_VOTES); crm_debug("Sending expected-votes=%s to corosync", value); send_cluster_text(crm_class_quorum, value, TRUE, NULL, crm_msg_ais); } #endif free(fsa_cluster_name); fsa_cluster_name = NULL; value = g_hash_table_lookup(config_hash, "cluster-name"); if (value) { fsa_cluster_name = strdup(value); } alerts = first_named_child(output, XML_CIB_TAG_ALERTS); parse_alerts(alerts); set_bit(fsa_input_register, R_READ_CONFIG); crm_trace("Triggering FSA: %s", __FUNCTION__); mainloop_set_trigger(fsa_source); g_hash_table_destroy(config_hash); bail: crm_time_free(now); } gboolean crm_read_options(gpointer user_data) { int call_id = fsa_cib_conn->cmds->query(fsa_cib_conn, "//" XML_CIB_TAG_CRMCONFIG " | //" XML_CIB_TAG_ALERTS, NULL, cib_xpath | cib_scope_local); fsa_register_cib_callback(call_id, FALSE, NULL, config_query_callback); crm_trace("Querying the CIB... call %d", call_id); return TRUE; } /* A_READCONFIG */ void do_read_config(long long action, enum crmd_fsa_cause cause, enum crmd_fsa_state cur_state, enum crmd_fsa_input current_input, fsa_data_t * msg_data) { throttle_init(); mainloop_set_trigger(config_read); } void crm_shutdown(int nsig) { if (crmd_mainloop != NULL && g_main_is_running(crmd_mainloop)) { if (is_set(fsa_input_register, R_SHUTDOWN)) { crm_err("Escalating the shutdown"); register_fsa_input_before(C_SHUTDOWN, I_ERROR, NULL); } else { set_bit(fsa_input_register, R_SHUTDOWN); register_fsa_input(C_SHUTDOWN, I_SHUTDOWN, NULL); if (shutdown_escalation_timer->period_ms < 1) { const char *value = crmd_pref(NULL, XML_CONFIG_ATTR_FORCE_QUIT); int msec = crm_get_msec(value); crm_debug("Using default shutdown escalation: %dms", msec); shutdown_escalation_timer->period_ms = msec; } /* can't rely on this... */ crm_notice("Shutting down cluster resource manager " CRM_XS " limit=%dms", shutdown_escalation_timer->period_ms); crm_timer_start(shutdown_escalation_timer); } } else { crm_info("exit from shutdown"); crmd_exit(pcmk_ok); } } diff --git a/include/crm/cib.h b/include/crm/cib.h index a1246d1b72..ec52602896 100644 --- a/include/crm/cib.h +++ b/include/crm/cib.h @@ -1,189 +1,190 @@ /* * Copyright (C) 2004 Andrew Beekhof * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This software is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ /** * \file * \brief Cluster Configuration * \ingroup cib */ #ifndef CIB__H # define CIB__H # include # include # define CIB_FEATURE_SET "2.0" /* use compare_version() for doing comparisons */ enum cib_variant { cib_undefined, cib_native, cib_file, cib_remote, cib_database, }; enum cib_state { cib_connected_command, cib_connected_query, cib_disconnected }; enum cib_conn_type { cib_command, cib_query, cib_no_connection, cib_command_nonblocking, }; /* *INDENT-OFF* */ enum cib_call_options { cib_none = 0x00000000, cib_verbose = 0x00000001, cib_xpath = 0x00000002, cib_multiple = 0x00000004, cib_can_create = 0x00000008, cib_discard_reply = 0x00000010, cib_no_children = 0x00000020, cib_xpath_address = 0x00000040, cib_mixed_update = 0x00000080, cib_scope_local = 0x00000100, cib_dryrun = 0x00000200, cib_sync_call = 0x00001000, cib_no_mtime = 0x00002000, cib_zero_copy = 0x00004000, cib_inhibit_notify = 0x00010000, cib_quorum_override = 0x00100000, cib_inhibit_bcast = 0x01000000, /* TODO: Remove */ cib_force_diff = 0x10000000 }; #define cib_default_options = cib_none #define T_CIB_DIFF_NOTIFY "cib_diff_notify" /* *INDENT-ON* */ typedef struct cib_s cib_t; typedef struct cib_api_operations_s { int (*signon) (cib_t * cib, const char *name, enum cib_conn_type type); int (*signon_raw) (cib_t * cib, const char *name, enum cib_conn_type type, int *event_fd); int (*signoff) (cib_t * cib); int (*free) (cib_t * cib); int (*set_op_callback) (cib_t * cib, void (*callback) (const xmlNode * msg, int callid, int rc, xmlNode * output)); int (*add_notify_callback) (cib_t * cib, const char *event, void (*callback) (const char *event, xmlNode * msg)); int (*del_notify_callback) (cib_t * cib, const char *event, void (*callback) (const char *event, xmlNode * msg)); int (*set_connection_dnotify) (cib_t * cib, void (*dnotify) (gpointer user_data)); int (*inputfd) (cib_t * cib); int (*noop) (cib_t * cib, int call_options); int (*ping) (cib_t * cib, xmlNode ** output_data, int call_options); int (*query) (cib_t * cib, const char *section, xmlNode ** output_data, int call_options); int (*query_from) (cib_t * cib, const char *host, const char *section, xmlNode ** output_data, int call_options); int (*is_master) (cib_t * cib); int (*set_master) (cib_t * cib, int call_options); int (*set_slave) (cib_t * cib, int call_options); int (*set_slave_all) (cib_t * cib, int call_options); int (*sync) (cib_t * cib, const char *section, int call_options); int (*sync_from) (cib_t * cib, const char *host, const char *section, int call_options); int (*upgrade) (cib_t * cib, int call_options); int (*bump_epoch) (cib_t * cib, int call_options); int (*create) (cib_t * cib, const char *section, xmlNode * data, int call_options); int (*modify) (cib_t * cib, const char *section, xmlNode * data, int call_options); int (*update) (cib_t * cib, const char *section, xmlNode * data, int call_options); int (*replace) (cib_t * cib, const char *section, xmlNode * data, int call_options); int (*delete) (cib_t * cib, const char *section, xmlNode * data, int call_options); int (*erase) (cib_t * cib, xmlNode ** output_data, int call_options); int (*delete_absolute) (cib_t * cib, const char *section, xmlNode * data, int call_options); int (*quit) (cib_t * cib, int call_options); int (*register_notification) (cib_t * cib, const char *callback, int enabled); gboolean(*register_callback) (cib_t * cib, int call_id, int timeout, gboolean only_success, void *user_data, const char *callback_name, void (*callback) (xmlNode *, int, int, xmlNode *, void *)); gboolean (*register_callback_full)(cib_t *cib, int call_id, int timeout, gboolean only_success, void *user_data, const char *callback_name, void (*callback)(xmlNode *, int, int, xmlNode *, void *), void (*free_func)(void *)); } cib_api_operations_t; struct cib_s { enum cib_state state; enum cib_conn_type type; enum cib_variant variant; int call_id; int call_timeout; void *variant_opaque; void *delegate_fn; GList *notify_list; void (*op_callback) (const xmlNode * msg, int call_id, int rc, xmlNode * output); cib_api_operations_t *cmds; }; /* Core functions */ cib_t *cib_new(void); cib_t *cib_native_new(void); cib_t *cib_file_new(const char *filename); cib_t *cib_remote_new(const char *server, const char *user, const char *passwd, int port, gboolean encrypted); cib_t *cib_new_no_shadow(void); char *get_shadow_file(const char *name); cib_t *cib_shadow_new(const char *name); +void cib_free_callbacks(cib_t *cib); void cib_delete(cib_t * cib); void cib_dump_pending_callbacks(void); int num_cib_op_callbacks(void); void remove_cib_op_callback(int call_id, gboolean all_callbacks); /* Deprecated */ # define add_cib_op_callback(cib, id, flag, data, fn) do { \ cib->cmds->register_callback(cib, id, 120, flag, data, #fn, fn); \ } while(0) # include # define CIB_LIBRARY "libcib.so.4" #endif diff --git a/include/crm/common/ipcs.h b/include/crm/common/ipcs.h index 2fec93178a..ba1ccefc7f 100644 --- a/include/crm/common/ipcs.h +++ b/include/crm/common/ipcs.h @@ -1,120 +1,123 @@ /* * Copyright (C) 2013 Andrew Beekhof * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This software is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #ifndef CRM_COMMON_IPCS__H # define CRM_COMMON_IPCS__H # include # ifdef HAVE_GNUTLS_GNUTLS_H # undef KEYFILE # include # endif # include # include typedef struct crm_client_s crm_client_t; enum client_type { CRM_CLIENT_IPC = 1, CRM_CLIENT_TCP = 2, # ifdef HAVE_GNUTLS_GNUTLS_H CRM_CLIENT_TLS = 3, # endif }; struct crm_remote_s { /* Shared */ char *buffer; size_t buffer_size; size_t buffer_offset; int auth_timeout; int tcp_socket; mainloop_io_t *source; /* CIB-only */ bool authenticated; char *token; /* TLS only */ # ifdef HAVE_GNUTLS_GNUTLS_H gnutls_session_t *tls_session; bool tls_handshake_complete; # endif }; enum crm_client_flags { crm_client_flag_ipc_proxied = 0x00001, /* ipc_proxy code only */ }; struct crm_client_s { uint pid; uid_t uid; gid_t gid; char *id; char *name; char *user; + /* Provided for server use (not used by library) */ + /* @TODO merge options, flags, and kind (reserving lower bits for server) */ long long options; int request_id; uint32_t flags; void *userdata; int event_timer; - GList *event_queue; + GList *event_queue; /* @TODO use GQueue instead */ /* Depending on the value of kind, only some of the following * will be populated/valid */ enum client_type kind; qb_ipcs_connection_t *ipcs; /* IPC */ struct crm_remote_s *remote; /* TCP/TLS */ + unsigned int backlog_len; /* IPC queue length after last flush */ }; extern GHashTable *client_connections; void crm_client_init(void); void crm_client_cleanup(void); crm_client_t *crm_client_get(qb_ipcs_connection_t * c); crm_client_t *crm_client_get_by_id(const char *id); const char *crm_client_name(crm_client_t * c); crm_client_t *crm_client_new(qb_ipcs_connection_t * c, uid_t uid, gid_t gid); void crm_client_destroy(crm_client_t * c); void crm_client_disconnect_all(qb_ipcs_service_t *s); void crm_ipcs_send_ack(crm_client_t * c, uint32_t request, uint32_t flags, const char *tag, const char *function, int line); /* when max_send_size is 0, default ipc buffer size is used */ ssize_t crm_ipc_prepare(uint32_t request, xmlNode * message, struct iovec ** result, uint32_t max_send_size); ssize_t crm_ipcs_send(crm_client_t * c, uint32_t request, xmlNode * message, enum crm_ipc_flags flags); ssize_t crm_ipcs_sendv(crm_client_t * c, struct iovec *iov, enum crm_ipc_flags flags); xmlNode *crm_ipcs_recv(crm_client_t * c, void *data, size_t size, uint32_t * id, uint32_t * flags); int crm_ipcs_client_pid(qb_ipcs_connection_t * c); #endif diff --git a/lib/cib/cib_client.c b/lib/cib/cib_client.c index 5ded9434f5..907bb5aef9 100644 --- a/lib/cib/cib_client.c +++ b/lib/cib/cib_client.c @@ -1,679 +1,687 @@ /* * Copyright (c) 2004 Andrew Beekhof * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include GHashTable *cib_op_callback_table = NULL; int cib_client_set_op_callback(cib_t * cib, void (*callback) (const xmlNode * msg, int call_id, int rc, xmlNode * output)); int cib_client_add_notify_callback(cib_t * cib, const char *event, void (*callback) (const char *event, xmlNode * msg)); int cib_client_del_notify_callback(cib_t * cib, const char *event, void (*callback) (const char *event, xmlNode * msg)); gint ciblib_GCompareFunc(gconstpointer a, gconstpointer b); #define op_common(cib) do { \ if(cib == NULL) { \ return -EINVAL; \ } else if(cib->delegate_fn == NULL) { \ return -EPROTONOSUPPORT; \ } \ } while(0) static int cib_client_noop(cib_t * cib, int call_options) { op_common(cib); return cib_internal_op(cib, CRM_OP_NOOP, NULL, NULL, NULL, NULL, call_options, NULL); } static int cib_client_ping(cib_t * cib, xmlNode ** output_data, int call_options) { op_common(cib); return cib_internal_op(cib, CRM_OP_PING, NULL, NULL, NULL, output_data, call_options, NULL); } static int cib_client_query(cib_t * cib, const char *section, xmlNode ** output_data, int call_options) { return cib->cmds->query_from(cib, NULL, section, output_data, call_options); } static int cib_client_query_from(cib_t * cib, const char *host, const char *section, xmlNode ** output_data, int call_options) { op_common(cib); return cib_internal_op(cib, CIB_OP_QUERY, host, section, NULL, output_data, call_options, NULL); } static int cib_client_is_master(cib_t * cib) { op_common(cib); return cib_internal_op(cib, CIB_OP_ISMASTER, NULL, NULL, NULL, NULL, cib_scope_local | cib_sync_call, NULL); } static int cib_client_set_slave(cib_t * cib, int call_options) { op_common(cib); return cib_internal_op(cib, CIB_OP_SLAVE, NULL, NULL, NULL, NULL, call_options, NULL); } static int cib_client_set_slave_all(cib_t * cib, int call_options) { return -EPROTONOSUPPORT; } static int cib_client_set_master(cib_t * cib, int call_options) { op_common(cib); crm_trace("Adding cib_scope_local to options"); return cib_internal_op(cib, CIB_OP_MASTER, NULL, NULL, NULL, NULL, call_options | cib_scope_local, NULL); } static int cib_client_bump_epoch(cib_t * cib, int call_options) { op_common(cib); return cib_internal_op(cib, CIB_OP_BUMP, NULL, NULL, NULL, NULL, call_options, NULL); } static int cib_client_upgrade(cib_t * cib, int call_options) { op_common(cib); return cib_internal_op(cib, CIB_OP_UPGRADE, NULL, NULL, NULL, NULL, call_options, NULL); } static int cib_client_sync(cib_t * cib, const char *section, int call_options) { return cib->cmds->sync_from(cib, NULL, section, call_options); } static int cib_client_sync_from(cib_t * cib, const char *host, const char *section, int call_options) { op_common(cib); return cib_internal_op(cib, CIB_OP_SYNC, host, section, NULL, NULL, call_options, NULL); } static int cib_client_create(cib_t * cib, const char *section, xmlNode * data, int call_options) { op_common(cib); return cib_internal_op(cib, CIB_OP_CREATE, NULL, section, data, NULL, call_options, NULL); } static int cib_client_modify(cib_t * cib, const char *section, xmlNode * data, int call_options) { op_common(cib); return cib_internal_op(cib, CIB_OP_MODIFY, NULL, section, data, NULL, call_options, NULL); } static int cib_client_update(cib_t * cib, const char *section, xmlNode * data, int call_options) { op_common(cib); return cib_internal_op(cib, CIB_OP_MODIFY, NULL, section, data, NULL, call_options, NULL); } static int cib_client_replace(cib_t * cib, const char *section, xmlNode * data, int call_options) { op_common(cib); return cib_internal_op(cib, CIB_OP_REPLACE, NULL, section, data, NULL, call_options, NULL); } static int cib_client_delete(cib_t * cib, const char *section, xmlNode * data, int call_options) { op_common(cib); return cib_internal_op(cib, CIB_OP_DELETE, NULL, section, data, NULL, call_options, NULL); } static int cib_client_delete_absolute(cib_t * cib, const char *section, xmlNode * data, int call_options) { op_common(cib); return cib_internal_op(cib, CIB_OP_DELETE_ALT, NULL, section, data, NULL, call_options, NULL); } static int cib_client_erase(cib_t * cib, xmlNode ** output_data, int call_options) { op_common(cib); return cib_internal_op(cib, CIB_OP_ERASE, NULL, NULL, NULL, output_data, call_options, NULL); } static void cib_destroy_op_callback(gpointer data) { cib_callback_client_t *blob = data; if (blob->timer && blob->timer->ref > 0) { g_source_remove(blob->timer->ref); } free(blob->timer); if (blob->user_data && blob->free_func) { blob->free_func(blob->user_data); } free(blob); } +static void +destroy_op_callback_table() +{ + if (cib_op_callback_table != NULL) { + g_hash_table_destroy(cib_op_callback_table); + cib_op_callback_table = NULL; + } +} + char * get_shadow_file(const char *suffix) { char *cib_home = NULL; char *fullname = NULL; char *name = crm_concat("shadow", suffix, '.'); const char *dir = getenv("CIB_shadow_dir"); if (dir == NULL) { uid_t uid = geteuid(); struct passwd *pwent = getpwuid(uid); const char *user = NULL; if (pwent) { user = pwent->pw_name; } else { crm_perror(LOG_ERR, "Cannot get password entry for uid: %d", uid); user = getenv("USER"); } if (safe_str_eq(user, "root") || safe_str_eq(user, CRM_DAEMON_USER)) { dir = CRM_CONFIG_DIR; } else { const char *home = NULL; if ((home = getenv("HOME")) == NULL) { if (pwent) { home = pwent->pw_dir; } } if ((dir = getenv("TMPDIR")) == NULL) { dir = "/tmp"; } if (home && home[0] == '/') { int rc = 0; cib_home = crm_concat(home, ".cib", '/'); rc = mkdir(cib_home, 0700); if (rc < 0 && errno != EEXIST) { crm_perror(LOG_ERR, "Couldn't create user-specific shadow directory: %s", cib_home); errno = 0; } else { dir = cib_home; } } } } fullname = crm_concat(dir, name, '/'); free(cib_home); free(name); return fullname; } cib_t * cib_shadow_new(const char *shadow) { cib_t *new_cib = NULL; char *shadow_file = NULL; CRM_CHECK(shadow != NULL, return NULL); shadow_file = get_shadow_file(shadow); new_cib = cib_file_new(shadow_file); free(shadow_file); return new_cib; } cib_t * cib_new_no_shadow(void) { unsetenv("CIB_shadow"); return cib_new(); } cib_t * cib_new(void) { const char *value = getenv("CIB_shadow"); if (value && value[0] != 0) { return cib_shadow_new(value); } value = getenv("CIB_file"); if (value) { return cib_file_new(value); } value = getenv("CIB_port"); if (value) { gboolean encrypted = TRUE; int port = crm_parse_int(value, NULL); const char *server = getenv("CIB_server"); const char *user = getenv("CIB_user"); const char *pass = getenv("CIB_passwd"); value = getenv("CIB_encrypted"); if (value && crm_is_true(value) == FALSE) { crm_info("Disabling TLS"); encrypted = FALSE; } if (user == NULL) { user = CRM_DAEMON_USER; crm_info("Defaulting to user: %s", user); } if (server == NULL) { server = "localhost"; crm_info("Defaulting to localhost"); } return cib_remote_new(server, user, pass, port, encrypted); } return cib_native_new(); } /*! * \internal * \brief Create a generic CIB connection instance * * \return Newly allocated and initialized cib_t instance * * \note This is called by each variant's cib_*_new() function before setting * variant-specific values. */ cib_t * cib_new_variant(void) { cib_t *new_cib = NULL; new_cib = calloc(1, sizeof(cib_t)); - if (cib_op_callback_table != NULL) { - g_hash_table_destroy(cib_op_callback_table); - cib_op_callback_table = NULL; - } - if (cib_op_callback_table == NULL) { - cib_op_callback_table = g_hash_table_new_full(g_direct_hash, g_direct_equal, - NULL, cib_destroy_op_callback); - } + remove_cib_op_callback(0, TRUE); /* remove all */ new_cib->call_id = 1; new_cib->variant = cib_undefined; new_cib->type = cib_no_connection; new_cib->state = cib_disconnected; new_cib->op_callback = NULL; new_cib->variant_opaque = NULL; new_cib->notify_list = NULL; /* the rest will get filled in by the variant constructor */ new_cib->cmds = calloc(1, sizeof(cib_api_operations_t)); new_cib->cmds->set_op_callback = cib_client_set_op_callback; new_cib->cmds->add_notify_callback = cib_client_add_notify_callback; new_cib->cmds->del_notify_callback = cib_client_del_notify_callback; new_cib->cmds->register_callback = cib_client_register_callback; new_cib->cmds->register_callback_full = cib_client_register_callback_full; new_cib->cmds->noop = cib_client_noop; new_cib->cmds->ping = cib_client_ping; new_cib->cmds->query = cib_client_query; new_cib->cmds->sync = cib_client_sync; new_cib->cmds->query_from = cib_client_query_from; new_cib->cmds->sync_from = cib_client_sync_from; new_cib->cmds->is_master = cib_client_is_master; new_cib->cmds->set_master = cib_client_set_master; new_cib->cmds->set_slave = cib_client_set_slave; new_cib->cmds->set_slave_all = cib_client_set_slave_all; new_cib->cmds->upgrade = cib_client_upgrade; new_cib->cmds->bump_epoch = cib_client_bump_epoch; new_cib->cmds->create = cib_client_create; new_cib->cmds->modify = cib_client_modify; new_cib->cmds->update = cib_client_update; new_cib->cmds->replace = cib_client_replace; new_cib->cmds->delete = cib_client_delete; new_cib->cmds->erase = cib_client_erase; new_cib->cmds->delete_absolute = cib_client_delete_absolute; return new_cib; } +/*! + * \brief Free all callbacks for a CIB connection + * + * \param[in] cib CIB connection to clean up + */ void -cib_delete(cib_t * cib) +cib_free_callbacks(cib_t *cib) { - GList *list = NULL; - if(cib) { - list = cib->notify_list; - } + if (cib) { + GList *list = cib->notify_list; - while (list != NULL) { - cib_notify_client_t *client = g_list_nth_data(list, 0); - - list = g_list_remove(list, client); - free(client); - } + while (list != NULL) { + cib_notify_client_t *client = g_list_nth_data(list, 0); - if(cib_op_callback_table) { - g_hash_table_destroy(cib_op_callback_table); - cib_op_callback_table = NULL; + list = g_list_remove(list, client); + free(client); + } } + destroy_op_callback_table(); +} - if(cib) { +/*! + * \brief Free all memory used by CIB connection + * + * \param[in] cib CIB connection to delete + */ +void +cib_delete(cib_t *cib) +{ + cib_free_callbacks(cib); + if (cib) { cib->cmds->free(cib); } } int cib_client_set_op_callback(cib_t * cib, void (*callback) (const xmlNode * msg, int call_id, int rc, xmlNode * output)) { if (callback == NULL) { crm_info("Un-Setting operation callback"); } else { crm_trace("Setting operation callback"); } cib->op_callback = callback; return pcmk_ok; } int cib_client_add_notify_callback(cib_t * cib, const char *event, void (*callback) (const char *event, xmlNode * msg)) { GList *list_item = NULL; cib_notify_client_t *new_client = NULL; if (cib->variant != cib_native && cib->variant != cib_remote) { return -EPROTONOSUPPORT; } crm_trace("Adding callback for %s events (%d)", event, g_list_length(cib->notify_list)); new_client = calloc(1, sizeof(cib_notify_client_t)); new_client->event = event; new_client->callback = callback; list_item = g_list_find_custom(cib->notify_list, new_client, ciblib_GCompareFunc); if (list_item != NULL) { crm_warn("Callback already present"); free(new_client); return -ENOTUNIQ; } else { cib->notify_list = g_list_append(cib->notify_list, new_client); cib->cmds->register_notification(cib, event, 1); crm_trace("Callback added (%d)", g_list_length(cib->notify_list)); } return pcmk_ok; } static int get_notify_list_event_count(cib_t * cib, const char *event) { GList *l = NULL; int count = 0; for (l = g_list_first(cib->notify_list); l; l = g_list_next(l)) { cib_notify_client_t *client = (cib_notify_client_t *)l->data; if (strcmp(client->event, event) == 0) { count++; } } crm_trace("event(%s) count : %d", event, count); return count; } int cib_client_del_notify_callback(cib_t * cib, const char *event, void (*callback) (const char *event, xmlNode * msg)) { GList *list_item = NULL; cib_notify_client_t *new_client = NULL; if (cib->variant != cib_native && cib->variant != cib_remote) { return -EPROTONOSUPPORT; } if (get_notify_list_event_count(cib, event) == 0) { crm_debug("The callback of the event does not exist(%s)", event); return pcmk_ok; } crm_debug("Removing callback for %s events", event); new_client = calloc(1, sizeof(cib_notify_client_t)); new_client->event = event; new_client->callback = callback; list_item = g_list_find_custom(cib->notify_list, new_client, ciblib_GCompareFunc); if (list_item != NULL) { cib_notify_client_t *list_client = list_item->data; cib->notify_list = g_list_remove(cib->notify_list, list_client); free(list_client); crm_trace("Removed callback"); } else { crm_trace("Callback not present"); } if (get_notify_list_event_count(cib, event) == 0) { /* When there is not the registration of the event, the processing turns off a notice. */ cib->cmds->register_notification(cib, event, 0); } free(new_client); return pcmk_ok; } gint ciblib_GCompareFunc(gconstpointer a, gconstpointer b) { int rc = 0; const cib_notify_client_t *a_client = a; const cib_notify_client_t *b_client = b; CRM_CHECK(a_client->event != NULL && b_client->event != NULL, return 0); rc = strcmp(a_client->event, b_client->event); if (rc == 0) { if (a_client->callback == b_client->callback) { return 0; } else if (((long)a_client->callback) < ((long)b_client->callback)) { crm_trace("callbacks for %s are not equal: %p < %p", a_client->event, a_client->callback, b_client->callback); return -1; } crm_trace("callbacks for %s are not equal: %p > %p", a_client->event, a_client->callback, b_client->callback); return 1; } return rc; } static gboolean cib_async_timeout_handler(gpointer data) { struct timer_rec_s *timer = data; crm_debug("Async call %d timed out after %ds", timer->call_id, timer->timeout); cib_native_callback(timer->cib, NULL, timer->call_id, -ETIME); /* Always return TRUE, never remove the handler * We do that in remove_cib_op_callback() */ return TRUE; } gboolean cib_client_register_callback(cib_t * cib, int call_id, int timeout, gboolean only_success, void *user_data, const char *callback_name, void (*callback) (xmlNode *, int, int, xmlNode *, void *)) { return cib_client_register_callback_full(cib, call_id, timeout, only_success, user_data, callback_name, callback, NULL); } gboolean cib_client_register_callback_full(cib_t *cib, int call_id, int timeout, gboolean only_success, void *user_data, const char *callback_name, void (*callback)(xmlNode *, int, int, xmlNode *, void *), void (*free_func)(void *)) { cib_callback_client_t *blob = NULL; if (call_id < 0) { if (only_success == FALSE) { callback(NULL, call_id, call_id, NULL, user_data); } else { crm_warn("CIB call failed: %s", pcmk_strerror(call_id)); } if (user_data && free_func) { free_func(user_data); } return FALSE; } blob = calloc(1, sizeof(cib_callback_client_t)); blob->id = callback_name; blob->only_success = only_success; blob->user_data = user_data; blob->callback = callback; blob->free_func = free_func; if (timeout > 0) { struct timer_rec_s *async_timer = NULL; async_timer = calloc(1, sizeof(struct timer_rec_s)); blob->timer = async_timer; async_timer->cib = cib; async_timer->call_id = call_id; async_timer->timeout = timeout * 1000; async_timer->ref = g_timeout_add(async_timer->timeout, cib_async_timeout_handler, async_timer); } crm_trace("Adding callback %s for call %d", callback_name, call_id); g_hash_table_insert(cib_op_callback_table, GINT_TO_POINTER(call_id), blob); return TRUE; } void remove_cib_op_callback(int call_id, gboolean all_callbacks) { if (all_callbacks) { - if (cib_op_callback_table != NULL) { - g_hash_table_destroy(cib_op_callback_table); - } - + destroy_op_callback_table(); cib_op_callback_table = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, cib_destroy_op_callback); - } else { g_hash_table_remove(cib_op_callback_table, GINT_TO_POINTER(call_id)); } } int num_cib_op_callbacks(void) { if (cib_op_callback_table == NULL) { return 0; } return g_hash_table_size(cib_op_callback_table); } static void cib_dump_pending_op(gpointer key, gpointer value, gpointer user_data) { int call = GPOINTER_TO_INT(key); cib_callback_client_t *blob = value; crm_debug("Call %d (%s): pending", call, crm_str(blob->id)); } void cib_dump_pending_callbacks(void) { if (cib_op_callback_table == NULL) { return; } return g_hash_table_foreach(cib_op_callback_table, cib_dump_pending_op, NULL); } diff --git a/lib/cib/cib_utils.c b/lib/cib/cib_utils.c index 1908401230..ab48f1657e 100644 --- a/lib/cib/cib_utils.c +++ b/lib/cib/cib_utils.c @@ -1,834 +1,834 @@ /* * Copyright (c) 2004 International Business Machines * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA * */ #include #include #include #include #include #include #include #include #include #include #include #include #include struct config_root_s { const char *name; const char *parent; const char *path; }; /* * "//crm_config" will also work in place of "/cib/configuration/crm_config" * The / prefix means find starting from the root, whereas the // prefix means * find anywhere and risks multiple matches */ /* *INDENT-OFF* */ struct config_root_s known_paths[] = { { NULL, NULL, "//cib" }, { XML_TAG_CIB, NULL, "//cib" }, { XML_CIB_TAG_STATUS, "/cib", "//cib/status" }, { XML_CIB_TAG_CONFIGURATION,"/cib", "//cib/configuration" }, { XML_CIB_TAG_CRMCONFIG, "/cib/configuration", "//cib/configuration/crm_config" }, { XML_CIB_TAG_NODES, "/cib/configuration", "//cib/configuration/nodes" }, { XML_CIB_TAG_DOMAINS, "/cib/configuration", "//cib/configuration/domains" }, { XML_CIB_TAG_RESOURCES, "/cib/configuration", "//cib/configuration/resources" }, { XML_CIB_TAG_CONSTRAINTS, "/cib/configuration", "//cib/configuration/constraints" }, { XML_CIB_TAG_OPCONFIG, "/cib/configuration", "//cib/configuration/op_defaults" }, { XML_CIB_TAG_RSCCONFIG, "/cib/configuration", "//cib/configuration/rsc_defaults" }, { XML_CIB_TAG_ACLS, "/cib/configuration", "//cib/configuration/acls" }, { XML_TAG_FENCING_TOPOLOGY, "/cib/configuration", "//cib/configuration/fencing-topology" }, { XML_CIB_TAG_SECTION_ALL, NULL, "//cib" }, }; /* *INDENT-ON* */ int cib_compare_generation(xmlNode * left, xmlNode * right) { int lpc = 0; const char *attributes[] = { XML_ATTR_GENERATION_ADMIN, XML_ATTR_GENERATION, XML_ATTR_NUMUPDATES, }; crm_log_xml_trace(left, "left"); crm_log_xml_trace(right, "right"); for (lpc = 0; lpc < DIMOF(attributes); lpc++) { int int_elem_l = -1; int int_elem_r = -1; const char *elem_r = NULL; const char *elem_l = crm_element_value(left, attributes[lpc]); if (right != NULL) { elem_r = crm_element_value(right, attributes[lpc]); } if (elem_l != NULL) { int_elem_l = crm_parse_int(elem_l, NULL); } if (elem_r != NULL) { int_elem_r = crm_parse_int(elem_r, NULL); } if (int_elem_l < int_elem_r) { crm_trace("%s (%s < %s)", attributes[lpc], crm_str(elem_l), crm_str(elem_r)); return -1; } else if (int_elem_l > int_elem_r) { crm_trace("%s (%s > %s)", attributes[lpc], crm_str(elem_l), crm_str(elem_r)); return 1; } } return 0; } /* Deprecated - doesn't expose -EACCES */ xmlNode * get_cib_copy(cib_t * cib) { xmlNode *xml_cib; int options = cib_scope_local | cib_sync_call; int rc = pcmk_ok; if (cib->state == cib_disconnected) { return NULL; } rc = cib->cmds->query(cib, NULL, &xml_cib, options); if (rc == -EACCES) { return NULL; } else if (rc != pcmk_ok) { crm_err("Couldn't retrieve the CIB"); free_xml(xml_cib); return NULL; } else if (xml_cib == NULL) { crm_err("The CIB result was empty"); free_xml(xml_cib); return NULL; } if (safe_str_eq(crm_element_name(xml_cib), XML_TAG_CIB)) { return xml_cib; } free_xml(xml_cib); return NULL; } xmlNode * cib_get_generation(cib_t * cib) { xmlNode *the_cib = NULL; xmlNode *generation = create_xml_node(NULL, XML_CIB_TAG_GENERATION_TUPPLE); cib->cmds->query(cib, NULL, &the_cib, cib_scope_local | cib_sync_call); if (the_cib != NULL) { copy_in_properties(generation, the_cib); free_xml(the_cib); } return generation; } gboolean cib_version_details(xmlNode * cib, int *admin_epoch, int *epoch, int *updates) { *epoch = -1; *updates = -1; *admin_epoch = -1; if (cib == NULL) { return FALSE; } else { crm_element_value_int(cib, XML_ATTR_GENERATION, epoch); crm_element_value_int(cib, XML_ATTR_NUMUPDATES, updates); crm_element_value_int(cib, XML_ATTR_GENERATION_ADMIN, admin_epoch); } return TRUE; } gboolean cib_diff_version_details(xmlNode * diff, int *admin_epoch, int *epoch, int *updates, int *_admin_epoch, int *_epoch, int *_updates) { int add[] = { 0, 0, 0 }; int del[] = { 0, 0, 0 }; xml_patch_versions(diff, add, del); *admin_epoch = add[0]; *epoch = add[1]; *updates = add[2]; *_admin_epoch = del[0]; *_epoch = del[1]; *_updates = del[2]; return TRUE; } /* * The caller should never free the return value */ const char * get_object_path(const char *object_type) { int lpc = 0; int max = DIMOF(known_paths); for (; lpc < max; lpc++) { if ((object_type == NULL && known_paths[lpc].name == NULL) || safe_str_eq(object_type, known_paths[lpc].name)) { return known_paths[lpc].path; } } return NULL; } const char * get_object_parent(const char *object_type) { int lpc = 0; int max = DIMOF(known_paths); for (; lpc < max; lpc++) { if (safe_str_eq(object_type, known_paths[lpc].name)) { return known_paths[lpc].parent; } } return NULL; } xmlNode * get_object_root(const char *object_type, xmlNode * the_root) { const char *xpath = get_object_path(object_type); if (xpath == NULL) { return the_root; /* or return NULL? */ } return get_xpath_object(xpath, the_root, LOG_DEBUG_4); } /* * It is the callers responsibility to free both the new CIB (output) * and the new CIB (input) */ xmlNode * createEmptyCib(int admin_epoch) { xmlNode *cib_root = NULL, *config = NULL; cib_root = create_xml_node(NULL, XML_TAG_CIB); crm_xml_add(cib_root, XML_ATTR_CRM_VERSION, CRM_FEATURE_SET); crm_xml_add(cib_root, XML_ATTR_VALIDATION, xml_latest_schema()); crm_xml_add_int(cib_root, XML_ATTR_GENERATION, admin_epoch); crm_xml_add_int(cib_root, XML_ATTR_NUMUPDATES, 0); crm_xml_add_int(cib_root, XML_ATTR_GENERATION_ADMIN, 0); config = create_xml_node(cib_root, XML_CIB_TAG_CONFIGURATION); create_xml_node(cib_root, XML_CIB_TAG_STATUS); create_xml_node(config, XML_CIB_TAG_CRMCONFIG); create_xml_node(config, XML_CIB_TAG_NODES); create_xml_node(config, XML_CIB_TAG_RESOURCES); create_xml_node(config, XML_CIB_TAG_CONSTRAINTS); return cib_root; } static bool cib_acl_enabled(xmlNode *xml, const char *user) { bool rc = FALSE; #if ENABLE_ACL if(pcmk_acl_required(user)) { const char *value = NULL; GHashTable *options = g_hash_table_new_full(crm_str_hash, g_str_equal, g_hash_destroy_str, g_hash_destroy_str); cib_read_config(options, xml); value = cib_pref(options, "enable-acl"); rc = crm_is_true(value); g_hash_table_destroy(options); } - crm_debug("CIB ACL is %s", rc ? "enabled" : "disabled"); + crm_trace("CIB ACL is %s", rc ? "enabled" : "disabled"); #endif return rc; } int cib_perform_op(const char *op, int call_options, cib_op_t * fn, gboolean is_query, const char *section, xmlNode * req, xmlNode * input, gboolean manage_counters, gboolean * config_changed, xmlNode * current_cib, xmlNode ** result_cib, xmlNode ** diff, xmlNode ** output) { int rc = pcmk_ok; gboolean check_dtd = TRUE; xmlNode *top = NULL; xmlNode *scratch = NULL; xmlNode *local_diff = NULL; const char *new_version = NULL; static struct qb_log_callsite *diff_cs = NULL; const char *user = crm_element_value(req, F_CIB_USER); bool with_digest = FALSE; crm_trace("Begin %s%s%s op", is_set(call_options, cib_dryrun)?"dry-run of ":"", is_query ? "read-only " : "", op); CRM_CHECK(output != NULL, return -ENOMSG); CRM_CHECK(result_cib != NULL, return -ENOMSG); CRM_CHECK(config_changed != NULL, return -ENOMSG); if(output) { *output = NULL; } *result_cib = NULL; *config_changed = FALSE; if (fn == NULL) { return -EINVAL; } if (is_query) { xmlNode *cib_ro = current_cib; xmlNode *cib_filtered = NULL; if(cib_acl_enabled(cib_ro, user)) { if(xml_acl_filtered_copy(user, current_cib, current_cib, &cib_filtered)) { if (cib_filtered == NULL) { crm_debug("Pre-filtered the entire cib"); return -EACCES; } cib_ro = cib_filtered; crm_log_xml_trace(cib_ro, "filtered"); } } rc = (*fn) (op, call_options, section, req, input, cib_ro, result_cib, output); if(output == NULL || *output == NULL) { /* nothing */ } else if(cib_filtered == *output) { cib_filtered = NULL; /* Let them have this copy */ } else if(*output == current_cib) { /* They already know not to free it */ } else if(cib_filtered && (*output)->doc == cib_filtered->doc) { /* We're about to free the document of which *output is a part */ *output = copy_xml(*output); } else if((*output)->doc == current_cib->doc) { /* Give them a copy they can free */ *output = copy_xml(*output); } free_xml(cib_filtered); return rc; } if (is_set(call_options, cib_zero_copy)) { /* Conditional on v2 patch style */ scratch = current_cib; /* Create a shallow copy of current_cib for the version details */ current_cib = create_xml_node(NULL, (const char *)scratch->name); copy_in_properties(current_cib, scratch); top = current_cib; xml_track_changes(scratch, user, NULL, cib_acl_enabled(scratch, user)); rc = (*fn) (op, call_options, section, req, input, scratch, &scratch, output); } else { scratch = copy_xml(current_cib); xml_track_changes(scratch, user, NULL, cib_acl_enabled(scratch, user)); rc = (*fn) (op, call_options, section, req, input, current_cib, &scratch, output); if(scratch && xml_tracking_changes(scratch) == FALSE) { crm_trace("Inferring changes after %s op", op); xml_track_changes(scratch, user, current_cib, cib_acl_enabled(current_cib, user)); xml_calculate_changes(current_cib, scratch); } CRM_CHECK(current_cib != scratch, return -EINVAL); } xml_acl_disable(scratch); /* Allow the system to make any additional changes */ if (rc == pcmk_ok && scratch == NULL) { rc = -EINVAL; goto done; } else if(rc == pcmk_ok && xml_acl_denied(scratch)) { crm_trace("ACL rejected part or all of the proposed changes"); rc = -EACCES; goto done; } else if (rc != pcmk_ok) { goto done; } if (scratch) { new_version = crm_element_value(scratch, XML_ATTR_CRM_VERSION); if (new_version && compare_version(new_version, CRM_FEATURE_SET) > 0) { crm_err("Discarding update with feature set '%s' greater than our own '%s'", new_version, CRM_FEATURE_SET); rc = -EPROTONOSUPPORT; goto done; } } if (current_cib) { int old = 0; int new = 0; crm_element_value_int(scratch, XML_ATTR_GENERATION_ADMIN, &new); crm_element_value_int(current_cib, XML_ATTR_GENERATION_ADMIN, &old); if (old > new) { crm_err("%s went backwards: %d -> %d (Opts: 0x%x)", XML_ATTR_GENERATION_ADMIN, old, new, call_options); crm_log_xml_warn(req, "Bad Op"); crm_log_xml_warn(input, "Bad Data"); rc = -pcmk_err_old_data; } else if (old == new) { crm_element_value_int(scratch, XML_ATTR_GENERATION, &new); crm_element_value_int(current_cib, XML_ATTR_GENERATION, &old); if (old > new) { crm_err("%s went backwards: %d -> %d (Opts: 0x%x)", XML_ATTR_GENERATION, old, new, call_options); crm_log_xml_warn(req, "Bad Op"); crm_log_xml_warn(input, "Bad Data"); rc = -pcmk_err_old_data; } } } crm_trace("Massaging CIB contents"); strip_text_nodes(scratch); fix_plus_plus_recursive(scratch); if (is_set(call_options, cib_zero_copy)) { /* At this point, current_cib is just the 'cib' tag and its properties, * * The v1 format would barf on this, but we know the v2 patch * format only needs it for the top-level version fields */ local_diff = xml_create_patchset(2, current_cib, scratch, (bool*)config_changed, manage_counters); } else { static time_t expires = 0; time_t tm_now = time(NULL); if (expires < tm_now) { expires = tm_now + 60; /* Validate clients are correctly applying v2-style diffs at most once a minute */ with_digest = TRUE; } local_diff = xml_create_patchset(0, current_cib, scratch, (bool*)config_changed, manage_counters); } xml_log_changes(LOG_TRACE, __FUNCTION__, scratch); xml_accept_changes(scratch); if (diff_cs == NULL) { diff_cs = qb_log_callsite_get(__PRETTY_FUNCTION__, __FILE__, "diff-validation", LOG_DEBUG, __LINE__, crm_trace_nonlog); } if(local_diff) { patchset_process_digest(local_diff, current_cib, scratch, with_digest); xml_log_patchset(LOG_INFO, __FUNCTION__, local_diff); crm_log_xml_trace(local_diff, "raw patch"); } if (is_not_set(call_options, cib_zero_copy) /* The original to compare against doesn't exist */ && local_diff && crm_is_callsite_active(diff_cs, LOG_TRACE, 0)) { /* Validate the calculated patch set */ int test_rc, format = 1; xmlNode * c = copy_xml(current_cib); crm_element_value_int(local_diff, "format", &format); test_rc = xml_apply_patchset(c, local_diff, manage_counters); if(test_rc != pcmk_ok) { save_xml_to_file(c, "PatchApply:calculated", NULL); save_xml_to_file(current_cib, "PatchApply:input", NULL); save_xml_to_file(scratch, "PatchApply:actual", NULL); save_xml_to_file(local_diff, "PatchApply:diff", NULL); crm_err("v%d patchset error, patch failed to apply: %s (%d)", format, pcmk_strerror(test_rc), test_rc); } free_xml(c); } if (safe_str_eq(section, XML_CIB_TAG_STATUS)) { /* Throttle the amount of costly validation we perform due to status updates * a) we don't really care whats in the status section * b) we don't validate any of its contents at the moment anyway */ check_dtd = FALSE; } /* === scratch must not be modified after this point === * Exceptions, anything in: static filter_t filter[] = { { 0, XML_ATTR_ORIGIN }, { 0, XML_CIB_ATTR_WRITTEN }, { 0, XML_ATTR_UPDATE_ORIG }, { 0, XML_ATTR_UPDATE_CLIENT }, { 0, XML_ATTR_UPDATE_USER }, }; */ if (*config_changed && is_not_set(call_options, cib_no_mtime)) { char *now_str = NULL; time_t now = time(NULL); const char *schema = crm_element_value(scratch, XML_ATTR_VALIDATION); now_str = ctime(&now); now_str[24] = EOS; /* replace the newline */ crm_xml_replace(scratch, XML_CIB_ATTR_WRITTEN, now_str); if (schema) { static int minimum_schema = 0; int current_schema = get_schema_version(schema); if (minimum_schema == 0) { minimum_schema = get_schema_version("pacemaker-1.2"); } /* Does the CIB support the "update-*" attributes... */ if (current_schema >= minimum_schema) { const char *origin = crm_element_value(req, F_ORIG); CRM_LOG_ASSERT(origin != NULL); crm_xml_replace(scratch, XML_ATTR_UPDATE_ORIG, origin); crm_xml_replace(scratch, XML_ATTR_UPDATE_CLIENT, crm_element_value(req, F_CIB_CLIENTNAME)); #if ENABLE_ACL crm_xml_replace(scratch, XML_ATTR_UPDATE_USER, crm_element_value(req, F_CIB_USER)); #endif } } } crm_trace("Perform validation: %s", check_dtd ? "true" : "false"); if (rc == pcmk_ok && check_dtd && validate_xml(scratch, NULL, TRUE) == FALSE) { const char *current_dtd = crm_element_value(scratch, XML_ATTR_VALIDATION); crm_warn("Updated CIB does not validate against %s schema/dtd", crm_str(current_dtd)); rc = -pcmk_err_schema_validation; } done: *result_cib = scratch; #if ENABLE_ACL if(rc != pcmk_ok && cib_acl_enabled(current_cib, user)) { if(xml_acl_filtered_copy(user, current_cib, scratch, result_cib)) { if (*result_cib == NULL) { crm_debug("Pre-filtered the entire cib result"); } free_xml(scratch); } } #endif if(diff) { *diff = local_diff; } else { free_xml(local_diff); } free_xml(top); crm_trace("Done"); return rc; } xmlNode * cib_create_op(int call_id, const char *token, const char *op, const char *host, const char *section, xmlNode * data, int call_options, const char *user_name) { xmlNode *op_msg = create_xml_node(NULL, "cib_command"); CRM_CHECK(op_msg != NULL, return NULL); CRM_CHECK(token != NULL, return NULL); crm_xml_add(op_msg, F_XML_TAGNAME, "cib_command"); crm_xml_add(op_msg, F_TYPE, T_CIB); crm_xml_add(op_msg, F_CIB_CALLBACK_TOKEN, token); crm_xml_add(op_msg, F_CIB_OPERATION, op); crm_xml_add(op_msg, F_CIB_HOST, host); crm_xml_add(op_msg, F_CIB_SECTION, section); crm_xml_add_int(op_msg, F_CIB_CALLID, call_id); #if ENABLE_ACL if (user_name) { crm_xml_add(op_msg, F_CIB_USER, user_name); } #endif crm_trace("Sending call options: %.8lx, %d", (long)call_options, call_options); crm_xml_add_int(op_msg, F_CIB_CALLOPTS, call_options); if (data != NULL) { add_message_xml(op_msg, F_CIB_CALLDATA, data); } if (call_options & cib_inhibit_bcast) { CRM_CHECK((call_options & cib_scope_local), return NULL); } return op_msg; } void cib_native_callback(cib_t * cib, xmlNode * msg, int call_id, int rc) { xmlNode *output = NULL; cib_callback_client_t *blob = NULL; if (msg != NULL) { crm_element_value_int(msg, F_CIB_RC, &rc); crm_element_value_int(msg, F_CIB_CALLID, &call_id); output = get_message_xml(msg, F_CIB_CALLDATA); } blob = g_hash_table_lookup(cib_op_callback_table, GINT_TO_POINTER(call_id)); if (blob == NULL) { crm_trace("No callback found for call %d", call_id); } if (cib == NULL) { crm_debug("No cib object supplied"); } if (rc == -pcmk_err_diff_resync) { /* This is an internal value that clients do not and should not care about */ rc = pcmk_ok; } if (blob && blob->callback && (rc == pcmk_ok || blob->only_success == FALSE)) { crm_trace("Invoking callback %s for call %d", crm_str(blob->id), call_id); blob->callback(msg, call_id, rc, output, blob->user_data); } else if (cib && cib->op_callback == NULL && rc != pcmk_ok) { crm_warn("CIB command failed: %s", pcmk_strerror(rc)); crm_log_xml_debug(msg, "Failed CIB Update"); } /* This may free user_data, so do it after the callback */ if (blob) { remove_cib_op_callback(call_id, FALSE); } if (cib && cib->op_callback != NULL) { crm_trace("Invoking global callback for call %d", call_id); cib->op_callback(msg, call_id, rc, output); } crm_trace("OP callback activated for %d", call_id); } void cib_native_notify(gpointer data, gpointer user_data) { xmlNode *msg = user_data; cib_notify_client_t *entry = data; const char *event = NULL; if (msg == NULL) { crm_warn("Skipping callback - NULL message"); return; } event = crm_element_value(msg, F_SUBTYPE); if (entry == NULL) { crm_warn("Skipping callback - NULL callback client"); return; } else if (entry->callback == NULL) { crm_warn("Skipping callback - NULL callback"); return; } else if (safe_str_neq(entry->event, event)) { crm_trace("Skipping callback - event mismatch %p/%s vs. %s", entry, entry->event, event); return; } crm_trace("Invoking callback for %p/%s event...", entry, event); entry->callback(event, msg); crm_trace("Callback invoked..."); } pe_cluster_option cib_opts[] = { /* name, old-name, validate, default, description */ {"enable-acl", NULL, "boolean", NULL, "false", &check_boolean, "Enable CIB ACL", NULL} , }; void cib_metadata(void) { config_metadata("Cluster Information Base", "1.0", "Cluster Information Base Options", "This is a fake resource that details the options that can be configured for the Cluster Information Base.", cib_opts, DIMOF(cib_opts)); } void verify_cib_options(GHashTable * options) { verify_all_options(options, cib_opts, DIMOF(cib_opts)); } const char * cib_pref(GHashTable * options, const char *name) { return get_cluster_pref(options, cib_opts, DIMOF(cib_opts), name); } gboolean cib_read_config(GHashTable * options, xmlNode * current_cib) { xmlNode *config = NULL; crm_time_t *now = NULL; if (options == NULL || current_cib == NULL) { return FALSE; } now = crm_time_new(NULL); g_hash_table_remove_all(options); config = get_object_root(XML_CIB_TAG_CRMCONFIG, current_cib); if (config) { unpack_instance_attributes(current_cib, config, XML_CIB_TAG_PROPSET, NULL, options, CIB_OPTIONS_FIRST, FALSE, now); } verify_cib_options(options); crm_time_free(now); return TRUE; } int cib_apply_patch_event(xmlNode * event, xmlNode * input, xmlNode ** output, int level) { int rc = pcmk_err_generic; xmlNode *diff = NULL; CRM_ASSERT(event); CRM_ASSERT(input); CRM_ASSERT(output); crm_element_value_int(event, F_CIB_RC, &rc); diff = get_message_xml(event, F_CIB_UPDATE_RESULT); if (rc < pcmk_ok || diff == NULL) { return rc; } if (level > LOG_CRIT) { xml_log_patchset(level, "Config update", diff); } if (input != NULL) { rc = cib_process_diff(NULL, cib_none, NULL, event, diff, input, output, NULL); if (rc != pcmk_ok) { crm_debug("Update didn't apply: %s (%d) %p", pcmk_strerror(rc), rc, *output); if (rc == -pcmk_err_old_data) { crm_trace("Masking error, we already have the supplied update"); return pcmk_ok; } free_xml(*output); *output = NULL; return rc; } } return rc; } gboolean cib_internal_config_changed(xmlNode * diff) { gboolean changed = FALSE; xmlXPathObject *xpathObj = NULL; if (diff == NULL) { return FALSE; } xpathObj = xpath_search(diff, "//" XML_CIB_TAG_CRMCONFIG); if (numXpathResults(xpathObj) > 0) { changed = TRUE; } freeXpathObject(xpathObj); return changed; } int cib_internal_op(cib_t * cib, const char *op, const char *host, const char *section, xmlNode * data, xmlNode ** output_data, int call_options, const char *user_name) { int (*delegate) (cib_t * cib, const char *op, const char *host, const char *section, xmlNode * data, xmlNode ** output_data, int call_options, const char *user_name) = cib->delegate_fn; #if ENABLE_ACL if(user_name == NULL) { user_name = getenv("CIB_user"); } #endif return delegate(cib, op, host, section, data, output_data, call_options, user_name); } diff --git a/lib/common/ipc.c b/lib/common/ipc.c index 2949837e37..d32e373903 100644 --- a/lib/common/ipc.c +++ b/lib/common/ipc.c @@ -1,1285 +1,1324 @@ /* * Copyright (C) 2004 Andrew Beekhof * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define PCMK_IPC_VERSION 1 +/* Evict clients whose event queue grows this large */ +#define PCMK_IPC_MAX_QUEUE 500 + struct crm_ipc_response_header { struct qb_ipc_response_header qb; uint32_t size_uncompressed; uint32_t size_compressed; uint32_t flags; uint8_t version; /* Protect against version changes for anyone that might bother to statically link us */ }; static int hdr_offset = 0; static unsigned int ipc_buffer_max = 0; static unsigned int pick_ipc_buffer(unsigned int max); static inline void crm_ipc_init(void) { if (hdr_offset == 0) { hdr_offset = sizeof(struct crm_ipc_response_header); } if (ipc_buffer_max == 0) { ipc_buffer_max = pick_ipc_buffer(0); } } unsigned int crm_ipc_default_buffer_size(void) { return pick_ipc_buffer(0); } static char * generateReference(const char *custom1, const char *custom2) { static uint ref_counter = 0; const char *local_cust1 = custom1; const char *local_cust2 = custom2; int reference_len = 4; char *since_epoch = NULL; reference_len += 20; /* too big */ reference_len += 40; /* too big */ if (local_cust1 == NULL) { local_cust1 = "_empty_"; } reference_len += strlen(local_cust1); if (local_cust2 == NULL) { local_cust2 = "_empty_"; } reference_len += strlen(local_cust2); since_epoch = calloc(1, reference_len); if (since_epoch != NULL) { sprintf(since_epoch, "%s-%s-%lu-%u", local_cust1, local_cust2, (unsigned long)time(NULL), ref_counter++); } return since_epoch; } xmlNode * create_request_adv(const char *task, xmlNode * msg_data, const char *host_to, const char *sys_to, const char *sys_from, const char *uuid_from, const char *origin) { char *true_from = NULL; xmlNode *request = NULL; char *reference = generateReference(task, sys_from); if (uuid_from != NULL) { true_from = generate_hash_key(sys_from, uuid_from); } else if (sys_from != NULL) { true_from = strdup(sys_from); } else { crm_err("No sys from specified"); } /* host_from will get set for us if necessary by CRMd when routed */ request = create_xml_node(NULL, __FUNCTION__); crm_xml_add(request, F_CRM_ORIGIN, origin); crm_xml_add(request, F_TYPE, T_CRM); crm_xml_add(request, F_CRM_VERSION, CRM_FEATURE_SET); crm_xml_add(request, F_CRM_MSG_TYPE, XML_ATTR_REQUEST); crm_xml_add(request, F_CRM_REFERENCE, reference); crm_xml_add(request, F_CRM_TASK, task); crm_xml_add(request, F_CRM_SYS_TO, sys_to); crm_xml_add(request, F_CRM_SYS_FROM, true_from); /* HOSTTO will be ignored if it is to the DC anyway. */ if (host_to != NULL && strlen(host_to) > 0) { crm_xml_add(request, F_CRM_HOST_TO, host_to); } if (msg_data != NULL) { add_message_xml(request, F_CRM_DATA, msg_data); } free(reference); free(true_from); return request; } /* * This method adds a copy of xml_response_data */ xmlNode * create_reply_adv(xmlNode * original_request, xmlNode * xml_response_data, const char *origin) { xmlNode *reply = NULL; const char *host_from = crm_element_value(original_request, F_CRM_HOST_FROM); const char *sys_from = crm_element_value(original_request, F_CRM_SYS_FROM); const char *sys_to = crm_element_value(original_request, F_CRM_SYS_TO); const char *type = crm_element_value(original_request, F_CRM_MSG_TYPE); const char *operation = crm_element_value(original_request, F_CRM_TASK); const char *crm_msg_reference = crm_element_value(original_request, F_CRM_REFERENCE); if (type == NULL) { crm_err("Cannot create new_message, no message type in original message"); CRM_ASSERT(type != NULL); return NULL; #if 0 } else if (strcasecmp(XML_ATTR_REQUEST, type) != 0) { crm_err("Cannot create new_message, original message was not a request"); return NULL; #endif } reply = create_xml_node(NULL, __FUNCTION__); if (reply == NULL) { crm_err("Cannot create new_message, malloc failed"); return NULL; } crm_xml_add(reply, F_CRM_ORIGIN, origin); crm_xml_add(reply, F_TYPE, T_CRM); crm_xml_add(reply, F_CRM_VERSION, CRM_FEATURE_SET); crm_xml_add(reply, F_CRM_MSG_TYPE, XML_ATTR_RESPONSE); crm_xml_add(reply, F_CRM_REFERENCE, crm_msg_reference); crm_xml_add(reply, F_CRM_TASK, operation); /* since this is a reply, we reverse the from and to */ crm_xml_add(reply, F_CRM_SYS_TO, sys_from); crm_xml_add(reply, F_CRM_SYS_FROM, sys_to); /* HOSTTO will be ignored if it is to the DC anyway. */ if (host_from != NULL && strlen(host_from) > 0) { crm_xml_add(reply, F_CRM_HOST_TO, host_from); } if (xml_response_data != NULL) { add_message_xml(reply, F_CRM_DATA, xml_response_data); } return reply; } /* Libqb based IPC */ /* Server... */ GHashTable *client_connections = NULL; crm_client_t * crm_client_get(qb_ipcs_connection_t * c) { if (client_connections) { return g_hash_table_lookup(client_connections, c); } crm_trace("No client found for %p", c); return NULL; } crm_client_t * crm_client_get_by_id(const char *id) { gpointer key; crm_client_t *client; GHashTableIter iter; if (client_connections && id) { g_hash_table_iter_init(&iter, client_connections); while (g_hash_table_iter_next(&iter, &key, (gpointer *) & client)) { if (strcmp(client->id, id) == 0) { return client; } } } crm_trace("No client found with id=%s", id); return NULL; } const char * crm_client_name(crm_client_t * c) { if (c == NULL) { return "null"; } else if (c->name == NULL && c->id == NULL) { return "unknown"; } else if (c->name == NULL) { return c->id; } else { return c->name; } } void crm_client_init(void) { if (client_connections == NULL) { crm_trace("Creating client hash table"); client_connections = g_hash_table_new(g_direct_hash, g_direct_equal); } } void crm_client_cleanup(void) { if (client_connections != NULL) { int active = g_hash_table_size(client_connections); if (active) { crm_err("Exiting with %d active connections", active); } g_hash_table_destroy(client_connections); client_connections = NULL; } } void crm_client_disconnect_all(qb_ipcs_service_t *service) { qb_ipcs_connection_t *c = NULL; if (service == NULL) { return; } c = qb_ipcs_connection_first_get(service); while (c != NULL) { qb_ipcs_connection_t *last = c; c = qb_ipcs_connection_next_get(service, last); /* There really shouldn't be anyone connected at this point */ crm_notice("Disconnecting client %p, pid=%d...", last, crm_ipcs_client_pid(last)); qb_ipcs_disconnect(last); qb_ipcs_connection_unref(last); } } crm_client_t * crm_client_new(qb_ipcs_connection_t * c, uid_t uid_client, gid_t gid_client) { static gid_t gid_cluster = 0; crm_client_t *client = NULL; CRM_LOG_ASSERT(c); if (c == NULL) { return NULL; } if (gid_cluster == 0) { if(crm_user_lookup(CRM_DAEMON_USER, NULL, &gid_cluster) < 0) { static bool have_error = FALSE; if(have_error == FALSE) { crm_warn("Could not find group for user %s", CRM_DAEMON_USER); have_error = TRUE; } } } if (uid_client != 0) { crm_trace("Giving access to group %u", gid_cluster); /* Passing -1 to chown(2) means don't change */ qb_ipcs_connection_auth_set(c, -1, gid_cluster, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); } crm_client_init(); /* TODO: Do our own auth checking, return NULL if unauthorized */ client = calloc(1, sizeof(crm_client_t)); client->ipcs = c; client->kind = CRM_CLIENT_IPC; client->pid = crm_ipcs_client_pid(c); client->id = crm_generate_uuid(); crm_debug("Connecting %p for uid=%d gid=%d pid=%u id=%s", c, uid_client, gid_client, client->pid, client->id); #if ENABLE_ACL client->user = uid2username(uid_client); #endif g_hash_table_insert(client_connections, c, client); return client; } void crm_client_destroy(crm_client_t * c) { if (c == NULL) { return; } if (client_connections) { if (c->ipcs) { crm_trace("Destroying %p/%p (%d remaining)", c, c->ipcs, crm_hash_table_size(client_connections) - 1); g_hash_table_remove(client_connections, c->ipcs); } else { crm_trace("Destroying remote connection %p (%d remaining)", c, crm_hash_table_size(client_connections) - 1); g_hash_table_remove(client_connections, c->id); } } if (c->event_timer) { g_source_remove(c->event_timer); } crm_debug("Destroying %d events", g_list_length(c->event_queue)); while (c->event_queue) { struct iovec *event = c->event_queue->data; c->event_queue = g_list_remove(c->event_queue, event); free(event[0].iov_base); free(event[1].iov_base); free(event); } free(c->id); free(c->name); free(c->user); if (c->remote) { if (c->remote->auth_timeout) { g_source_remove(c->remote->auth_timeout); } free(c->remote->buffer); free(c->remote); } free(c); } int crm_ipcs_client_pid(qb_ipcs_connection_t * c) { struct qb_ipcs_connection_stats stats; stats.client_pid = 0; qb_ipcs_connection_stats_get(c, &stats, 0); return stats.client_pid; } xmlNode * crm_ipcs_recv(crm_client_t * c, void *data, size_t size, uint32_t * id, uint32_t * flags) { xmlNode *xml = NULL; char *uncompressed = NULL; char *text = ((char *)data) + sizeof(struct crm_ipc_response_header); struct crm_ipc_response_header *header = data; if (id) { *id = ((struct qb_ipc_response_header *)data)->id; } if (flags) { *flags = header->flags; } if (is_set(header->flags, crm_ipc_proxied)) { /* mark this client as being the endpoint of a proxy connection. * Proxy connections responses are sent on the event channel to avoid * blocking the proxy daemon (crmd) */ c->flags |= crm_client_flag_ipc_proxied; } if(header->version > PCMK_IPC_VERSION) { crm_err("Filtering incompatible v%d IPC message, we only support versions <= %d", header->version, PCMK_IPC_VERSION); return NULL; } if (header->size_compressed) { int rc = 0; unsigned int size_u = 1 + header->size_uncompressed; uncompressed = calloc(1, size_u); crm_trace("Decompressing message data %u bytes into %u bytes", header->size_compressed, size_u); rc = BZ2_bzBuffToBuffDecompress(uncompressed, &size_u, text, header->size_compressed, 1, 0); text = uncompressed; if (rc != BZ_OK) { crm_err("Decompression failed: %s (%d)", bz2_strerror(rc), rc); free(uncompressed); return NULL; } } CRM_ASSERT(text[header->size_uncompressed - 1] == 0); crm_trace("Received %.200s", text); xml = string2xml(text); free(uncompressed); return xml; } ssize_t crm_ipcs_flush_events(crm_client_t * c); static gboolean crm_ipcs_flush_events_cb(gpointer data) { crm_client_t *c = data; c->event_timer = 0; crm_ipcs_flush_events(c); return FALSE; } +/*! + * \internal + * \brief Add progressive delay before next event queue flush + * + * \param[in,out] c Client connection to add delay to + * \param[in] queue_len Current event queue length + */ +static inline void +delay_next_flush(crm_client_t *c, unsigned int queue_len) +{ + /* Delay a maximum of 5 seconds */ + guint delay = (queue_len < 40)? (1000 + 100 * queue_len) : 5000; + + c->event_timer = g_timeout_add(delay, crm_ipcs_flush_events_cb, c); +} + ssize_t crm_ipcs_flush_events(crm_client_t * c) { - int sent = 0; ssize_t rc = 0; - int queue_len = 0; + unsigned int sent = 0; + unsigned int queue_len = 0; if (c == NULL) { return pcmk_ok; } else if (c->event_timer) { /* There is already a timer, wait until it goes off */ crm_trace("Timer active for %p - %d", c->ipcs, c->event_timer); return pcmk_ok; } queue_len = g_list_length(c->event_queue); while (c->event_queue && sent < 100) { struct crm_ipc_response_header *header = NULL; struct iovec *event = c->event_queue->data; rc = qb_ipcs_event_sendv(c->ipcs, event, 2); if (rc < 0) { break; } sent++; header = event[0].iov_base; if (header->size_compressed) { crm_trace("Event %d to %p[%d] (%lld compressed bytes) sent", header->qb.id, c->ipcs, c->pid, (long long) rc); } else { crm_trace("Event %d to %p[%d] (%lld bytes) sent: %.120s", header->qb.id, c->ipcs, c->pid, (long long) rc, (char *) (event[1].iov_base)); } c->event_queue = g_list_remove(c->event_queue, event); free(event[0].iov_base); free(event[1].iov_base); free(event); } queue_len -= sent; - if (sent > 0 || c->event_queue) { + if (sent > 0 || queue_len) { crm_trace("Sent %d events (%d remaining) for %p[%d]: %s (%lld)", sent, queue_len, c->ipcs, c->pid, pcmk_strerror(rc < 0 ? rc : 0), (long long) rc); } - if (c->event_queue) { - if (queue_len % 100 == 0 && queue_len > 99) { - crm_warn("Event queue for %p[%d] has grown to %d", c->ipcs, c->pid, queue_len); + if (queue_len) { + /* We want to allow clients to briefly fall behind on processing + * incoming messages, but drop completely unresponsive clients so the + * connection doesn't consume resources indefinitely. + * + * @TODO It is possible that the queue could reasonably grow large in a + * short time. An example is a reprobe of hundreds of resources on many + * nodes resulting in a surge of CIB replies to the crmd. We could + * possibly give cluster daemons a higher threshold here, and/or prevent + * such a surge by throttling LRM history writes in the crmd. + */ - } else if (queue_len > 500) { - crm_err("Evicting slow client %p[%d]: event queue reached %d entries", - c->ipcs, c->pid, queue_len); - qb_ipcs_disconnect(c->ipcs); - return rc; + if (queue_len > PCMK_IPC_MAX_QUEUE) { + if ((c->backlog_len <= 1) || (queue_len < c->backlog_len)) { + /* Don't evict for a new or shrinking backlog */ + crm_warn("Client with process ID %u has a backlog of %u messages " + CRM_XS " %p", c->pid, queue_len, c->ipcs); + } else { + crm_err("Evicting client with process ID %u due to backlog of %u messages " + CRM_XS " %p", c->pid, queue_len, c->ipcs); + c->backlog_len = 0; + qb_ipcs_disconnect(c->ipcs); + return rc; + } } - c->event_timer = g_timeout_add(1000 + 100 * queue_len, crm_ipcs_flush_events_cb, c); + c->backlog_len = queue_len; + delay_next_flush(c, queue_len); + + } else { + /* Event queue is empty, there is no backlog */ + c->backlog_len = 0; } return rc; } ssize_t crm_ipc_prepare(uint32_t request, xmlNode * message, struct iovec ** result, uint32_t max_send_size) { static unsigned int biggest = 0; struct iovec *iov; unsigned int total = 0; char *compressed = NULL; char *buffer = dump_xml_unformatted(message); struct crm_ipc_response_header *header = calloc(1, sizeof(struct crm_ipc_response_header)); CRM_ASSERT(result != NULL); crm_ipc_init(); if (max_send_size == 0) { max_send_size = ipc_buffer_max; } CRM_LOG_ASSERT(max_send_size != 0); *result = NULL; iov = calloc(2, sizeof(struct iovec)); iov[0].iov_len = hdr_offset; iov[0].iov_base = header; header->version = PCMK_IPC_VERSION; header->size_uncompressed = 1 + strlen(buffer); total = iov[0].iov_len + header->size_uncompressed; if (total < max_send_size) { iov[1].iov_base = buffer; iov[1].iov_len = header->size_uncompressed; } else { unsigned int new_size = 0; if (crm_compress_string (buffer, header->size_uncompressed, max_send_size, &compressed, &new_size)) { header->flags |= crm_ipc_compressed; header->size_compressed = new_size; iov[1].iov_len = header->size_compressed; iov[1].iov_base = compressed; free(buffer); biggest = QB_MAX(header->size_compressed, biggest); } else { ssize_t rc = -EMSGSIZE; crm_log_xml_trace(message, "EMSGSIZE"); biggest = QB_MAX(header->size_uncompressed, biggest); crm_err ("Could not compress the message (%u bytes) into less than the configured ipc limit (%u bytes). " "Set PCMK_ipc_buffer to a higher value (%u bytes suggested)", header->size_uncompressed, max_send_size, 4 * biggest); free(compressed); free(buffer); free(header); free(iov); return rc; } } header->qb.size = iov[0].iov_len + iov[1].iov_len; header->qb.id = (int32_t)request; /* Replying to a specific request */ *result = iov; CRM_ASSERT(header->qb.size > 0); return header->qb.size; } ssize_t crm_ipcs_sendv(crm_client_t * c, struct iovec * iov, enum crm_ipc_flags flags) { ssize_t rc; static uint32_t id = 1; struct crm_ipc_response_header *header = iov[0].iov_base; if (c->flags & crm_client_flag_ipc_proxied) { /* _ALL_ replies to proxied connections need to be sent as events */ if (is_not_set(flags, crm_ipc_server_event)) { flags |= crm_ipc_server_event; /* this flag lets us know this was originally meant to be a response. * even though we're sending it over the event channel. */ flags |= crm_ipc_proxied_relay_response; } } header->flags |= flags; if (flags & crm_ipc_server_event) { header->qb.id = id++; /* We don't really use it, but doesn't hurt to set one */ if (flags & crm_ipc_server_free) { crm_trace("Sending the original to %p[%d]", c->ipcs, c->pid); c->event_queue = g_list_append(c->event_queue, iov); } else { struct iovec *iov_copy = calloc(2, sizeof(struct iovec)); crm_trace("Sending a copy to %p[%d]", c->ipcs, c->pid); iov_copy[0].iov_len = iov[0].iov_len; iov_copy[0].iov_base = malloc(iov[0].iov_len); memcpy(iov_copy[0].iov_base, iov[0].iov_base, iov[0].iov_len); iov_copy[1].iov_len = iov[1].iov_len; iov_copy[1].iov_base = malloc(iov[1].iov_len); memcpy(iov_copy[1].iov_base, iov[1].iov_base, iov[1].iov_len); c->event_queue = g_list_append(c->event_queue, iov_copy); } } else { CRM_LOG_ASSERT(header->qb.id != 0); /* Replying to a specific request */ rc = qb_ipcs_response_sendv(c->ipcs, iov, 2); if (rc < header->qb.size) { crm_notice("Response %d to %p[%d] (%u bytes) failed: %s (%d)", header->qb.id, c->ipcs, c->pid, header->qb.size, pcmk_strerror(rc), rc); } else { crm_trace("Response %d sent, %lld bytes to %p[%d]", header->qb.id, (long long) rc, c->ipcs, c->pid); } if (flags & crm_ipc_server_free) { free(iov[0].iov_base); free(iov[1].iov_base); free(iov); } } if (flags & crm_ipc_server_event) { rc = crm_ipcs_flush_events(c); } else { crm_ipcs_flush_events(c); } if (rc == -EPIPE || rc == -ENOTCONN) { crm_trace("Client %p disconnected", c->ipcs); } return rc; } ssize_t crm_ipcs_send(crm_client_t * c, uint32_t request, xmlNode * message, enum crm_ipc_flags flags) { struct iovec *iov = NULL; ssize_t rc = 0; if(c == NULL) { return -EDESTADDRREQ; } crm_ipc_init(); rc = crm_ipc_prepare(request, message, &iov, ipc_buffer_max); if (rc > 0) { rc = crm_ipcs_sendv(c, iov, flags | crm_ipc_server_free); } else { free(iov); crm_notice("Message to %p[%d] failed: %s (%d)", c->ipcs, c->pid, pcmk_strerror(rc), rc); } return rc; } void crm_ipcs_send_ack(crm_client_t * c, uint32_t request, uint32_t flags, const char *tag, const char *function, int line) { if (flags & crm_ipc_client_response) { xmlNode *ack = create_xml_node(NULL, tag); crm_trace("Ack'ing msg from %s (%p)", crm_client_name(c), c); c->request_id = 0; crm_xml_add(ack, "function", function); crm_xml_add_int(ack, "line", line); crm_ipcs_send(c, request, ack, flags); free_xml(ack); } } /* Client... */ #define MIN_MSG_SIZE 12336 /* sizeof(struct qb_ipc_connection_response) */ #define MAX_MSG_SIZE 128*1024 /* 128k default */ struct crm_ipc_s { struct pollfd pfd; /* the max size we can send/receive over ipc */ unsigned int max_buf_size; /* Size of the allocated 'buffer' */ unsigned int buf_size; int msg_size; int need_reply; char *buffer; char *name; uint32_t buffer_flags; qb_ipcc_connection_t *ipc; }; static unsigned int pick_ipc_buffer(unsigned int max) { static unsigned int global_max = 0; if (global_max == 0) { const char *env = getenv("PCMK_ipc_buffer"); if (env) { int env_max = crm_parse_int(env, "0"); global_max = (env_max > 0)? QB_MAX(MIN_MSG_SIZE, env_max) : MAX_MSG_SIZE; } else { global_max = MAX_MSG_SIZE; } } return QB_MAX(max, global_max); } crm_ipc_t * crm_ipc_new(const char *name, size_t max_size) { crm_ipc_t *client = NULL; client = calloc(1, sizeof(crm_ipc_t)); client->name = strdup(name); client->buf_size = pick_ipc_buffer(max_size); client->buffer = malloc(client->buf_size); /* Clients initiating connection pick the max buf size */ client->max_buf_size = client->buf_size; client->pfd.fd = -1; client->pfd.events = POLLIN; client->pfd.revents = 0; return client; } /*! * \brief Establish an IPC connection to a Pacemaker component * * \param[in] client Connection instance obtained from crm_ipc_new() * * \return TRUE on success, FALSE otherwise (in which case errno will be set) */ bool crm_ipc_connect(crm_ipc_t * client) { client->need_reply = FALSE; client->ipc = qb_ipcc_connect(client->name, client->buf_size); if (client->ipc == NULL) { crm_debug("Could not establish %s connection: %s (%d)", client->name, pcmk_strerror(errno), errno); return FALSE; } client->pfd.fd = crm_ipc_get_fd(client); if (client->pfd.fd < 0) { crm_debug("Could not obtain file descriptor for %s connection: %s (%d)", client->name, pcmk_strerror(errno), errno); return FALSE; } qb_ipcc_context_set(client->ipc, client); #ifdef HAVE_IPCS_GET_BUFFER_SIZE client->max_buf_size = qb_ipcc_get_buffer_size(client->ipc); if (client->max_buf_size > client->buf_size) { free(client->buffer); client->buffer = calloc(1, client->max_buf_size); client->buf_size = client->max_buf_size; } #endif return TRUE; } void crm_ipc_close(crm_ipc_t * client) { if (client) { crm_trace("Disconnecting %s IPC connection %p (%p)", client->name, client, client->ipc); if (client->ipc) { qb_ipcc_connection_t *ipc = client->ipc; client->ipc = NULL; qb_ipcc_disconnect(ipc); } } } void crm_ipc_destroy(crm_ipc_t * client) { if (client) { if (client->ipc && qb_ipcc_is_connected(client->ipc)) { crm_notice("Destroying an active IPC connection to %s", client->name); /* The next line is basically unsafe * * If this connection was attached to mainloop and mainloop is active, * the 'disconnected' callback will end up back here and we'll end * up free'ing the memory twice - something that can still happen * even without this if we destroy a connection and it closes before * we call exit */ /* crm_ipc_close(client); */ } crm_trace("Destroying IPC connection to %s: %p", client->name, client); free(client->buffer); free(client->name); free(client); } } int crm_ipc_get_fd(crm_ipc_t * client) { int fd = 0; if (client && client->ipc && (qb_ipcc_fd_get(client->ipc, &fd) == 0)) { return fd; } errno = EINVAL; crm_perror(LOG_ERR, "Could not obtain file IPC descriptor for %s", (client? client->name : "unspecified client")); return -errno; } bool crm_ipc_connected(crm_ipc_t * client) { bool rc = FALSE; if (client == NULL) { crm_trace("No client"); return FALSE; } else if (client->ipc == NULL) { crm_trace("No connection"); return FALSE; } else if (client->pfd.fd < 0) { crm_trace("Bad descriptor"); return FALSE; } rc = qb_ipcc_is_connected(client->ipc); if (rc == FALSE) { client->pfd.fd = -EINVAL; } return rc; } /*! * \brief Check whether an IPC connection is ready to be read * * \param[in] client Connection to check * * \return Positive value if ready to be read, 0 if not ready, -errno on error */ int crm_ipc_ready(crm_ipc_t *client) { int rc; CRM_ASSERT(client != NULL); if (crm_ipc_connected(client) == FALSE) { return -ENOTCONN; } client->pfd.revents = 0; rc = poll(&(client->pfd), 1, 0); return (rc < 0)? -errno : rc; } static int crm_ipc_decompress(crm_ipc_t * client) { struct crm_ipc_response_header *header = (struct crm_ipc_response_header *)(void*)client->buffer; if (header->size_compressed) { int rc = 0; unsigned int size_u = 1 + header->size_uncompressed; /* never let buf size fall below our max size required for ipc reads. */ unsigned int new_buf_size = QB_MAX((hdr_offset + size_u), client->max_buf_size); char *uncompressed = calloc(1, new_buf_size); crm_trace("Decompressing message data %u bytes into %u bytes", header->size_compressed, size_u); rc = BZ2_bzBuffToBuffDecompress(uncompressed + hdr_offset, &size_u, client->buffer + hdr_offset, header->size_compressed, 1, 0); if (rc != BZ_OK) { crm_err("Decompression failed: %s (%d)", bz2_strerror(rc), rc); free(uncompressed); return -EILSEQ; } /* * This assert no longer holds true. For an identical msg, some clients may * require compression, and others may not. If that same msg (event) is sent * to multiple clients, it could result in some clients receiving a compressed * msg even though compression was not explicitly required for them. * * CRM_ASSERT((header->size_uncompressed + hdr_offset) >= ipc_buffer_max); */ CRM_ASSERT(size_u == header->size_uncompressed); memcpy(uncompressed, client->buffer, hdr_offset); /* Preserve the header */ header = (struct crm_ipc_response_header *)(void*)uncompressed; free(client->buffer); client->buf_size = new_buf_size; client->buffer = uncompressed; } CRM_ASSERT(client->buffer[hdr_offset + header->size_uncompressed - 1] == 0); return pcmk_ok; } long crm_ipc_read(crm_ipc_t * client) { struct crm_ipc_response_header *header = NULL; CRM_ASSERT(client != NULL); CRM_ASSERT(client->ipc != NULL); CRM_ASSERT(client->buffer != NULL); crm_ipc_init(); client->buffer[0] = 0; client->msg_size = qb_ipcc_event_recv(client->ipc, client->buffer, client->buf_size - 1, 0); if (client->msg_size >= 0) { int rc = crm_ipc_decompress(client); if (rc != pcmk_ok) { return rc; } header = (struct crm_ipc_response_header *)(void*)client->buffer; if(header->version > PCMK_IPC_VERSION) { crm_err("Filtering incompatible v%d IPC message, we only support versions <= %d", header->version, PCMK_IPC_VERSION); return -EBADMSG; } crm_trace("Received %s event %d, size=%u, rc=%d, text: %.100s", client->name, header->qb.id, header->qb.size, client->msg_size, client->buffer + hdr_offset); } else { crm_trace("No message from %s received: %s", client->name, pcmk_strerror(client->msg_size)); } if (crm_ipc_connected(client) == FALSE || client->msg_size == -ENOTCONN) { crm_err("Connection to %s failed", client->name); } if (header) { /* Data excluding the header */ return header->size_uncompressed; } return -ENOMSG; } const char * crm_ipc_buffer(crm_ipc_t * client) { CRM_ASSERT(client != NULL); return client->buffer + sizeof(struct crm_ipc_response_header); } uint32_t crm_ipc_buffer_flags(crm_ipc_t * client) { struct crm_ipc_response_header *header = NULL; CRM_ASSERT(client != NULL); if (client->buffer == NULL) { return 0; } header = (struct crm_ipc_response_header *)(void*)client->buffer; return header->flags; } const char * crm_ipc_name(crm_ipc_t * client) { CRM_ASSERT(client != NULL); return client->name; } static int internal_ipc_send_recv(crm_ipc_t * client, const void *iov) { int rc = 0; do { rc = qb_ipcc_sendv_recv(client->ipc, iov, 2, client->buffer, client->buf_size, -1); } while (rc == -EAGAIN && crm_ipc_connected(client)); return rc; } static int internal_ipc_send_request(crm_ipc_t * client, const void *iov, int ms_timeout) { int rc = 0; time_t timeout = time(NULL) + 1 + (ms_timeout / 1000); do { rc = qb_ipcc_sendv(client->ipc, iov, 2); } while (rc == -EAGAIN && time(NULL) < timeout && crm_ipc_connected(client)); return rc; } static int internal_ipc_get_reply(crm_ipc_t * client, int request_id, int ms_timeout) { time_t timeout = time(NULL) + 1 + (ms_timeout / 1000); int rc = 0; crm_ipc_init(); /* get the reply */ crm_trace("client %s waiting on reply to msg id %d", client->name, request_id); do { rc = qb_ipcc_recv(client->ipc, client->buffer, client->buf_size, 1000); if (rc > 0) { struct crm_ipc_response_header *hdr = NULL; int rc = crm_ipc_decompress(client); if (rc != pcmk_ok) { return rc; } hdr = (struct crm_ipc_response_header *)(void*)client->buffer; if (hdr->qb.id == request_id) { /* Got it */ break; } else if (hdr->qb.id < request_id) { xmlNode *bad = string2xml(crm_ipc_buffer(client)); crm_err("Discarding old reply %d (need %d)", hdr->qb.id, request_id); crm_log_xml_notice(bad, "OldIpcReply"); } else { xmlNode *bad = string2xml(crm_ipc_buffer(client)); crm_err("Discarding newer reply %d (need %d)", hdr->qb.id, request_id); crm_log_xml_notice(bad, "ImpossibleReply"); CRM_ASSERT(hdr->qb.id <= request_id); } } else if (crm_ipc_connected(client) == FALSE) { crm_err("Server disconnected client %s while waiting for msg id %d", client->name, request_id); break; } } while (time(NULL) < timeout); return rc; } int crm_ipc_send(crm_ipc_t * client, xmlNode * message, enum crm_ipc_flags flags, int32_t ms_timeout, xmlNode ** reply) { long rc = 0; struct iovec *iov; static uint32_t id = 0; static int factor = 8; struct crm_ipc_response_header *header; crm_ipc_init(); if (client == NULL) { crm_notice("Invalid connection"); return -ENOTCONN; } else if (crm_ipc_connected(client) == FALSE) { /* Don't even bother */ crm_notice("Connection to %s closed", client->name); return -ENOTCONN; } if (ms_timeout == 0) { ms_timeout = 5000; } if (client->need_reply) { crm_trace("Trying again to obtain pending reply from %s", client->name); rc = qb_ipcc_recv(client->ipc, client->buffer, client->buf_size, ms_timeout); if (rc < 0) { crm_warn("Sending to %s (%p) is disabled until pending reply is received", client->name, client->ipc); return -EALREADY; } else { crm_notice("Lost reply from %s (%p) finally arrived, sending re-enabled", client->name, client->ipc); client->need_reply = FALSE; } } id++; CRM_LOG_ASSERT(id != 0); /* Crude wrap-around detection */ rc = crm_ipc_prepare(id, message, &iov, client->max_buf_size); if(rc < 0) { return rc; } header = iov[0].iov_base; header->flags |= flags; if(is_set(flags, crm_ipc_proxied)) { /* Don't look for a synchronous response */ clear_bit(flags, crm_ipc_client_response); } if(header->size_compressed) { if(factor < 10 && (client->max_buf_size / 10) < (rc / factor)) { crm_notice("Compressed message exceeds %d0%% of the configured ipc limit (%u bytes), " "consider setting PCMK_ipc_buffer to %u or higher", factor, client->max_buf_size, 2 * client->max_buf_size); factor++; } } crm_trace("Sending from client: %s request id: %d bytes: %u timeout:%d msg...", client->name, header->qb.id, header->qb.size, ms_timeout); if (ms_timeout > 0 || is_not_set(flags, crm_ipc_client_response)) { rc = internal_ipc_send_request(client, iov, ms_timeout); if (rc <= 0) { crm_trace("Failed to send from client %s request %d with %u bytes...", client->name, header->qb.id, header->qb.size); goto send_cleanup; } else if (is_not_set(flags, crm_ipc_client_response)) { crm_trace("Message sent, not waiting for reply to %d from %s to %u bytes...", header->qb.id, client->name, header->qb.size); goto send_cleanup; } rc = internal_ipc_get_reply(client, header->qb.id, ms_timeout); if (rc < 0) { /* No reply, for now, disable sending * * The alternative is to close the connection since we don't know * how to detect and discard out-of-sequence replies * * TODO - implement the above */ client->need_reply = TRUE; } } else { rc = internal_ipc_send_recv(client, iov); } if (rc > 0) { struct crm_ipc_response_header *hdr = (struct crm_ipc_response_header *)(void*)client->buffer; crm_trace("Received response %d, size=%u, rc=%ld, text: %.200s", hdr->qb.id, hdr->qb.size, rc, crm_ipc_buffer(client)); if (reply) { *reply = string2xml(crm_ipc_buffer(client)); } } else { crm_trace("Response not received: rc=%ld, errno=%d", rc, errno); } send_cleanup: if (crm_ipc_connected(client) == FALSE) { crm_notice("Connection to %s closed: %s (%ld)", client->name, pcmk_strerror(rc), rc); } else if (rc == -ETIMEDOUT) { crm_warn("Request %d to %s (%p) failed: %s (%ld) after %dms", header->qb.id, client->name, client->ipc, pcmk_strerror(rc), rc, ms_timeout); crm_write_blackbox(0, NULL); } else if (rc <= 0) { crm_warn("Request %d to %s (%p) failed: %s (%ld)", header->qb.id, client->name, client->ipc, pcmk_strerror(rc), rc); } free(header); free(iov[1].iov_base); free(iov); return rc; } /* Utils */ xmlNode * create_hello_message(const char *uuid, const char *client_name, const char *major_version, const char *minor_version) { xmlNode *hello_node = NULL; xmlNode *hello = NULL; if (uuid == NULL || strlen(uuid) == 0 || client_name == NULL || strlen(client_name) == 0 || major_version == NULL || strlen(major_version) == 0 || minor_version == NULL || strlen(minor_version) == 0) { crm_err("Missing fields, Hello message will not be valid."); return NULL; } hello_node = create_xml_node(NULL, XML_TAG_OPTIONS); crm_xml_add(hello_node, "major_version", major_version); crm_xml_add(hello_node, "minor_version", minor_version); crm_xml_add(hello_node, "client_name", client_name); crm_xml_add(hello_node, "client_uuid", uuid); crm_trace("creating hello message"); hello = create_request(CRM_OP_HELLO, hello_node, NULL, NULL, client_name, uuid); free_xml(hello_node); return hello; }