diff --git a/crmd/election.c b/crmd/election.c index 1864d5bce9..2c7b7c43a1 100644 --- a/crmd/election.c +++ b/crmd/election.c @@ -1,576 +1,577 @@ /* * 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 #define STORM_INTERVAL 2 /* in seconds */ #define STORM_MULTIPLIER 5 /* multiplied by the number of nodes */ GHashTable *voted = NULL; uint highest_born_on = -1; static int current_election_id = 1; static int crm_uptime(struct timeval *output) { static time_t expires = 0; static struct rusage info; time_t tm_now = time(NULL); if(expires < tm_now) { int rc = getrusage(RUSAGE_SELF, &info); output->tv_sec = 0; output->tv_usec = 0; if (rc < 0) { crm_perror(LOG_ERR, "Could not calculate the current uptime"); expires = 0; return -1; } crm_debug("Current CPU usage is: %lds, %ldus", (long)info.ru_utime.tv_sec, (long)info.ru_utime.tv_usec); } expires = tm_now + STORM_INTERVAL; /* N seconds after the last _access_ */ output->tv_sec = info.ru_utime.tv_sec; output->tv_usec = info.ru_utime.tv_usec; return 1; } static int crm_compare_age(struct timeval your_age) { struct timeval our_age; if (crm_uptime(&our_age) < 0) { return -1; } /* We want these times to be "significantly" different */ if (our_age.tv_sec > your_age.tv_sec) { crm_debug("Win: %ld vs %ld (seconds)", (long)our_age.tv_sec, (long)your_age.tv_sec); return 1; } else if (our_age.tv_sec < your_age.tv_sec) { crm_debug("Loose: %ld vs %ld (seconds)", (long)our_age.tv_sec, (long)your_age.tv_sec); return -1; } else if (our_age.tv_usec > your_age.tv_usec) { crm_debug("Win: %ld vs %ld (usec)", (long)our_age.tv_usec, (long)your_age.tv_usec); return 1; } else if (our_age.tv_usec < your_age.tv_usec) { crm_debug("Loose: %ld vs %ld (usec)", (long)our_age.tv_usec, (long)your_age.tv_usec); return -1; } return 0; } /* A_ELECTION_VOTE */ void do_election_vote(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 timeval age; xmlNode *vote = NULL; gboolean not_voting = FALSE; /* don't vote if we're in one of these states or wanting to shut down */ switch (cur_state) { case S_STARTING: case S_RECOVERY: case S_STOPPING: case S_TERMINATE: crm_warn("Not voting in election, we're in state %s", fsa_state2string(cur_state)); not_voting = TRUE; break; default: break; } if (not_voting == FALSE) { if (is_set(fsa_input_register, R_STARTING)) { not_voting = TRUE; } } if (not_voting) { if (AM_I_DC) { register_fsa_input(C_FSA_INTERNAL, I_RELEASE_DC, NULL); } else { register_fsa_input(C_FSA_INTERNAL, I_PENDING, NULL); } return; } vote = create_request(CRM_OP_VOTE, NULL, NULL, CRM_SYSTEM_CRMD, CRM_SYSTEM_CRMD, NULL); current_election_id++; crm_xml_add(vote, F_CRM_ELECTION_OWNER, fsa_our_uuid); crm_xml_add_int(vote, F_CRM_ELECTION_ID, current_election_id); crm_uptime(&age); crm_xml_add_int(vote, F_CRM_ELECTION_AGE_S, age.tv_sec); crm_xml_add_int(vote, F_CRM_ELECTION_AGE_US, age.tv_usec); send_cluster_message(NULL, crm_msg_crmd, vote, TRUE); free_xml(vote); crm_debug("Started election %d", current_election_id); if (voted) { g_hash_table_destroy(voted); } voted = NULL; if (cur_state == S_ELECTION || cur_state == S_RELEASE_DC) { crm_timer_start(election_timeout); } else if (cur_state != S_INTEGRATION) { crm_err("Broken? Voting in state %s", fsa_state2string(cur_state)); } return; } char *dc_hb_msg = NULL; int beat_num = 0; gboolean do_dc_heartbeat(gpointer data) { return TRUE; } struct election_data_s { const char *winning_uname; unsigned int winning_bornon; }; static void log_member_name(gpointer key, gpointer value, gpointer user_data) { const crm_node_t *node = value; if (crm_is_peer_active(node)) { crm_err("%s: %s proc=%.32x", (char *)user_data, (char *)key, node->processes); } } static void log_node(gpointer key, gpointer value, gpointer user_data) { crm_err("%s: %s", (char *)user_data, (char *)key); } void do_election_check(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 voted_size = 0; int num_members = crm_active_peers(); if (voted) { voted_size = g_hash_table_size(voted); } /* in the case of #voted > #members, it is better to * wait for the timeout and give the cluster time to * stabilize */ if (fsa_state != S_ELECTION) { crm_debug("Ignore election check: we not in an election"); } else if (voted_size >= num_members) { /* we won and everyone has voted */ crm_timer_stop(election_timeout); register_fsa_input(C_FSA_INTERNAL, I_ELECTION_DC, NULL); if (voted_size > num_members) { char *data = NULL; data = strdup("member"); g_hash_table_foreach(crm_peer_cache, log_member_name, data); free(data); data = strdup("voted"); g_hash_table_foreach(voted, log_node, data); free(data); } crm_debug("Destroying voted hash"); g_hash_table_destroy(voted); voted = NULL; } else { crm_debug("Still waiting on %d non-votes (%d total)", num_members - voted_size, num_members); } return; } #define loss_dampen 2 /* in seconds */ /* A_ELECTION_COUNT */ void do_election_count_vote(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 timeval your_age; int age = 0; int election_id = -1; int log_level = LOG_INFO; gboolean use_born_on = FALSE; gboolean done = FALSE; gboolean we_loose = FALSE; const char *op = NULL; const char *vote_from = NULL; const char *your_version = NULL; const char *election_owner = NULL; const char *reason = "unknown"; crm_node_t *our_node = NULL, *your_node = NULL; ha_msg_input_t *vote = fsa_typed_data(fsa_dt_ha_msg); static int election_wins = 0; time_t tm_now = time(NULL); static time_t expires = 0; static time_t last_election_loss = 0; /* if the membership copy is NULL we REALLY shouldnt be voting * the question is how we managed to get here. */ CRM_CHECK(msg_data != NULL, return); CRM_CHECK(crm_peer_cache != NULL, return); CRM_CHECK(vote != NULL, crm_err("Bogus data from %s", msg_data->origin); return); CRM_CHECK(vote->msg != NULL, crm_err("Bogus data from %s", msg_data->origin); return); your_age.tv_sec = 0; your_age.tv_usec = 0; op = crm_element_value(vote->msg, F_CRM_TASK); vote_from = crm_element_value(vote->msg, F_CRM_HOST_FROM); your_version = crm_element_value(vote->msg, F_CRM_VERSION); election_owner = crm_element_value(vote->msg, F_CRM_ELECTION_OWNER); crm_element_value_int(vote->msg, F_CRM_ELECTION_ID, &election_id); crm_element_value_int(vote->msg, F_CRM_ELECTION_AGE_S, (int *)&(your_age.tv_sec)); crm_element_value_int(vote->msg, F_CRM_ELECTION_AGE_US, (int *)&(your_age.tv_usec)); CRM_CHECK(vote_from != NULL, vote_from = fsa_our_uname); your_node = crm_get_peer(0, vote_from); our_node = crm_get_peer(0, fsa_our_uname); if (voted == NULL) { crm_debug("Created voted hash"); voted = g_hash_table_new_full(crm_str_hash, g_str_equal, g_hash_destroy_str, g_hash_destroy_str); } if (is_heartbeat_cluster()) { use_born_on = TRUE; } else if (is_classic_ais_cluster()) { use_born_on = TRUE; } age = crm_compare_age(your_age); if (cur_state == S_STARTING) { reason = "Still starting"; we_loose = TRUE; } else if (our_node == NULL || crm_is_peer_active(our_node) == FALSE) { reason = "We are not part of the cluster"; log_level = LOG_ERR; we_loose = TRUE; } else if (election_id != current_election_id && crm_str_eq(fsa_our_uuid, election_owner, TRUE)) { log_level = LOG_DEBUG_2; reason = "Superceeded"; done = TRUE; } else if (your_node == NULL || crm_is_peer_active(your_node) == FALSE) { /* Possibly we cached the message in the FSA queue at a point that it wasn't */ reason = "Peer is not part of our cluster"; log_level = LOG_WARNING; done = TRUE; } else if (crm_str_eq(op, CRM_OP_NOVOTE, TRUE)) { char *op_copy = strdup(op); char *uname_copy = strdup(vote_from); CRM_ASSERT(crm_str_eq(fsa_our_uuid, election_owner, TRUE)); /* update the list of nodes that have voted */ g_hash_table_replace(voted, uname_copy, op_copy); reason = "Recorded"; done = TRUE; } else if (crm_str_eq(vote_from, fsa_our_uname, TRUE)) { char *op_copy = strdup(op); char *uname_copy = strdup(vote_from); CRM_ASSERT(crm_str_eq(fsa_our_uuid, election_owner, TRUE)); /* update ourselves in the list of nodes that have voted */ g_hash_table_replace(voted, uname_copy, op_copy); reason = "Recorded"; done = TRUE; } else if (compare_version(your_version, CRM_FEATURE_SET) < 0) { reason = "Version"; we_loose = TRUE; } else if (compare_version(your_version, CRM_FEATURE_SET) > 0) { reason = "Version"; } else if (age < 0) { reason = "Uptime"; we_loose = TRUE; } else if (age > 0) { reason = "Uptime"; /* TODO: Check for y(our) born < 0 */ } else if (use_born_on && your_node->born < our_node->born) { reason = "Born"; we_loose = TRUE; } else if (use_born_on && your_node->born > our_node->born) { reason = "Born"; } else if (fsa_our_uname == NULL) { reason = "Unknown host name"; we_loose = TRUE; } else if (strcasecmp(fsa_our_uname, vote_from) > 0) { reason = "Host name"; we_loose = TRUE; } else { reason = "Host name"; CRM_ASSERT(strcmp(fsa_our_uname, vote_from) != 0); /* cant happen... * } else if(strcasecmp(fsa_our_uname, vote_from) == 0) { * * default... * } else { // strcasecmp(fsa_our_uname, vote_from) < 0 * we win */ } if(expires < tm_now) { election_wins = 0; expires = tm_now + STORM_INTERVAL; } else if(done == FALSE && we_loose == FALSE) { int peers = 1 + g_hash_table_size(crm_peer_cache); /* If every node has to vote down every other node, thats N*(N-1) total elections * Allow some leway before _really_ complaining */ election_wins++; if(election_wins > (peers * peers)) { - crm_err("Election storm detected: %d elections in %d seconds", election_wins, STORM_INTERVAL); + crm_warn("Election storm detected: %d elections in %d seconds", election_wins, STORM_INTERVAL); election_wins = 0; expires = tm_now + STORM_INTERVAL; + crm_write_blackbox(0, NULL); } } if (done) { do_crm_log(log_level + 1, "Election %d (current: %d, owner: %s): Processed %s from %s (%s)", election_id, current_election_id, election_owner, op, vote_from, reason); } else if (we_loose) { xmlNode *novote = create_request(CRM_OP_NOVOTE, NULL, vote_from, CRM_SYSTEM_CRMD, CRM_SYSTEM_CRMD, NULL); do_crm_log(log_level, "Election %d (owner: %s) lost: %s from %s (%s)", election_id, election_owner, op, vote_from, reason); update_dc(NULL); crm_timer_stop(election_timeout); if (fsa_input_register & R_THE_DC) { crm_trace("Give up the DC to %s", vote_from); register_fsa_input(C_FSA_INTERNAL, I_RELEASE_DC, NULL); } else if (cur_state != S_STARTING) { crm_trace("We werent the DC anyway"); register_fsa_input(C_FSA_INTERNAL, I_PENDING, NULL); } crm_xml_add(novote, F_CRM_ELECTION_OWNER, election_owner); crm_xml_add_int(novote, F_CRM_ELECTION_ID, election_id); send_cluster_message(crm_get_peer(0, vote_from), crm_msg_crmd, novote, TRUE); free_xml(novote); fsa_cib_conn->cmds->set_slave(fsa_cib_conn, cib_scope_local); last_election_loss = tm_now; } else { do_crm_log(log_level, "Election %d (owner: %s) pass: %s from %s (%s)", election_id, election_owner, op, vote_from, reason); if (last_election_loss) { if (tm_now - last_election_loss < (time_t) loss_dampen) { crm_info("Election %d ignore: We already lost an election less than %ds ago (%s)", election_id, loss_dampen, ctime(&last_election_loss)); update_dc(NULL); return; } last_election_loss = 0; } register_fsa_input(C_FSA_INTERNAL, I_ELECTION, NULL); g_hash_table_destroy(voted); voted = NULL; } } /* A_ELECT_TIMER_START, A_ELECTION_TIMEOUT */ /* we won */ void do_election_timer_ctrl(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 void feature_update_callback(xmlNode * msg, int call_id, int rc, xmlNode * output, void *user_data) { if (rc != pcmk_ok) { fsa_data_t *msg_data = NULL; register_fsa_error(C_FSA_INTERNAL, I_ERROR, NULL); } } /* A_DC_TAKEOVER */ void do_dc_takeover(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 rc = pcmk_ok; xmlNode *cib = NULL; GListPtr gIter = NULL; const char *cluster_type = name_for_cluster_type(get_cluster_type()); crm_info("Taking over DC status for this partition"); set_bit(fsa_input_register, R_THE_DC); for (gIter = stonith_cleanup_list; gIter != NULL; gIter = gIter->next) { char *target = gIter->data; const char *uuid = get_uuid(target); crm_notice("Marking %s, target of a previous stonith action, as clean", target); send_stonith_update(NULL, target, uuid); free(target); } g_list_free(stonith_cleanup_list); stonith_cleanup_list = NULL; #if SUPPORT_COROSYNC if (is_classic_ais_cluster()) { send_ais_text(crm_class_quorum, NULL, TRUE, NULL, crm_msg_ais); } #endif if (voted != NULL) { crm_trace("Destroying voted hash"); g_hash_table_destroy(voted); voted = NULL; } set_bit(fsa_input_register, R_JOIN_OK); set_bit(fsa_input_register, R_INVOKE_PE); fsa_cib_conn->cmds->set_master(fsa_cib_conn, cib_scope_local); cib = create_xml_node(NULL, XML_TAG_CIB); crm_xml_add(cib, XML_ATTR_CRM_VERSION, CRM_FEATURE_SET); fsa_cib_update(XML_TAG_CIB, cib, cib_quorum_override, rc, NULL); add_cib_op_callback(fsa_cib_conn, rc, FALSE, NULL, feature_update_callback); update_attr_delegate( fsa_cib_conn, cib_none, XML_CIB_TAG_CRMCONFIG, NULL, NULL, NULL, NULL, "dc-version", VERSION "-" BUILD_VERSION, FALSE, NULL); update_attr_delegate( fsa_cib_conn, cib_none, XML_CIB_TAG_CRMCONFIG, NULL, NULL, NULL, NULL, "cluster-infrastructure", cluster_type, FALSE, NULL); mainloop_set_trigger(config_read); free_xml(cib); } /* A_DC_RELEASE */ void do_dc_release(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) { if (action & A_DC_RELEASE) { crm_debug("Releasing the role of DC"); clear_bit(fsa_input_register, R_THE_DC); } else if (action & A_DC_RELEASED) { crm_info("DC role released"); #if 0 if (are there errors) { /* we cant stay up if not healthy */ /* or perhaps I_ERROR and go to S_RECOVER? */ result = I_SHUTDOWN; } #endif register_fsa_input(C_FSA_INTERNAL, I_RELEASE_SUCCESS, NULL); } else { crm_err("Unknown action %s", fsa_action2string(action)); } crm_trace("Am I still the DC? %s", AM_I_DC ? XML_BOOLEAN_YES : XML_BOOLEAN_NO); } diff --git a/crmd/messages.c b/crmd/messages.c index c5fcfecc5d..ef8d1c449f 100644 --- a/crmd/messages.c +++ b/crmd/messages.c @@ -1,969 +1,971 @@ /* * 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 GListPtr fsa_message_queue = NULL; extern void crm_shutdown(int nsig); void handle_response(xmlNode * stored_msg); enum crmd_fsa_input handle_request(xmlNode * stored_msg); enum crmd_fsa_input handle_shutdown_request(xmlNode * stored_msg); #ifdef MSG_LOG # define ROUTER_RESULT(x) crm_trace("Router result: %s", x); \ crm_log_xml_trace(msg, "router.log"); #else # define ROUTER_RESULT(x) crm_trace("Router result: %s", x) #endif /* debug only, can wrap all it likes */ int last_data_id = 0; void register_fsa_error_adv(enum crmd_fsa_cause cause, enum crmd_fsa_input input, fsa_data_t * cur_data, void *new_data, const char *raised_from) { /* save the current actions if any */ if (fsa_actions != A_NOTHING) { register_fsa_input_adv(cur_data ? cur_data->fsa_cause : C_FSA_INTERNAL, I_NULL, cur_data ? cur_data->data : NULL, fsa_actions, TRUE, __FUNCTION__); } /* reset the action list */ fsa_actions = A_NOTHING; /* register the error */ register_fsa_input_adv(cause, input, new_data, A_NOTHING, TRUE, raised_from); } int register_fsa_input_adv(enum crmd_fsa_cause cause, enum crmd_fsa_input input, void *data, long long with_actions, gboolean prepend, const char *raised_from) { unsigned old_len = g_list_length(fsa_message_queue); fsa_data_t *fsa_data = NULL; last_data_id++; CRM_CHECK(raised_from != NULL, raised_from = ""); crm_trace("%s %s FSA input %d (%s) (cause=%s) %s data", raised_from, prepend ? "prepended" : "appended", last_data_id, fsa_input2string(input), fsa_cause2string(cause), data ? "with" : "without"); if (input == I_WAIT_FOR_EVENT) { do_fsa_stall = TRUE; crm_debug("Stalling the FSA pending further input: cause=%s", fsa_cause2string(cause)); if (old_len > 0) { crm_warn("%s stalled the FSA with pending inputs", raised_from); fsa_dump_queue(LOG_DEBUG); + crm_write_blackbox(0, NULL); } if (data == NULL) { set_bit(fsa_actions, with_actions); with_actions = A_NOTHING; return 0; } crm_err("%s stalled the FSA with data - this may be broken", raised_from); } if (input == I_NULL && with_actions == A_NOTHING /* && data == NULL */ ) { /* no point doing anything */ crm_err("Cannot add entry to queue: no input and no action"); return 0; } fsa_data = calloc(1, sizeof(fsa_data_t)); fsa_data->id = last_data_id; fsa_data->fsa_input = input; fsa_data->fsa_cause = cause; fsa_data->origin = raised_from; fsa_data->data = NULL; fsa_data->data_type = fsa_dt_none; fsa_data->actions = with_actions; if (with_actions != A_NOTHING) { crm_trace("Adding actions %.16llx to input", with_actions); } if (data != NULL) { switch (cause) { case C_FSA_INTERNAL: case C_CRMD_STATUS_CALLBACK: case C_IPC_MESSAGE: case C_HA_MESSAGE: crm_trace("Copying %s data from %s as a HA msg", fsa_cause2string(cause), raised_from); CRM_CHECK(((ha_msg_input_t *) data)->msg != NULL, crm_err("Bogus data from %s", raised_from)); fsa_data->data = copy_ha_msg_input(data); fsa_data->data_type = fsa_dt_ha_msg; break; case C_LRM_OP_CALLBACK: crm_trace("Copying %s data from %s as lrmd_event_data_t", fsa_cause2string(cause), raised_from); fsa_data->data = lrmd_copy_event((lrmd_event_data_t *) data); fsa_data->data_type = fsa_dt_lrm; break; case C_CCM_CALLBACK: case C_SUBSYSTEM_CONNECT: case C_LRM_MONITOR_CALLBACK: case C_TIMER_POPPED: case C_SHUTDOWN: case C_HEARTBEAT_FAILED: case C_HA_DISCONNECT: case C_ILLEGAL: case C_UNKNOWN: case C_STARTUP: crm_err("Copying %s data (from %s)" " not yet implemented", fsa_cause2string(cause), raised_from); crmd_exit(1); break; } crm_trace("%s data copied", fsa_cause2string(fsa_data->fsa_cause)); } /* make sure to free it properly later */ if (prepend) { crm_trace("Prepending input"); fsa_message_queue = g_list_prepend(fsa_message_queue, fsa_data); } else { fsa_message_queue = g_list_append(fsa_message_queue, fsa_data); } crm_trace("Queue len: %d", g_list_length(fsa_message_queue)); /* fsa_dump_queue(LOG_DEBUG_2); */ if (old_len == g_list_length(fsa_message_queue)) { crm_err("Couldnt add message to the queue"); } if (fsa_source) { crm_trace("Triggering FSA: %s", __FUNCTION__); mainloop_set_trigger(fsa_source); } return last_data_id; } void fsa_dump_queue(int log_level) { int offset = 0; GListPtr lpc = NULL; for (lpc = fsa_message_queue; lpc != NULL; lpc = lpc->next) { fsa_data_t *data = (fsa_data_t *) lpc->data; do_crm_log_unlikely(log_level, - "queue[%d(%d)]: input %s raised by %s()\t(cause=%s)", + "queue[%d.%d]: input %s raised by %s(%p.%d)\t(cause=%s)", offset++, data->id, fsa_input2string(data->fsa_input), - data->origin, fsa_cause2string(data->fsa_cause)); + data->origin, data->data, data->data_type, + fsa_cause2string(data->fsa_cause)); } } ha_msg_input_t * copy_ha_msg_input(ha_msg_input_t * orig) { ha_msg_input_t *copy = NULL; xmlNodePtr data = NULL; if (orig != NULL) { crm_trace("Copy msg"); data = copy_xml(orig->msg); } else { crm_trace("No message to copy"); } copy = new_ha_msg_input(data); if (orig && orig->msg != NULL) { CRM_CHECK(copy->msg != NULL, crm_err("copy failed")); } return copy; } void delete_fsa_input(fsa_data_t * fsa_data) { lrmd_event_data_t *op = NULL; xmlNode *foo = NULL; if (fsa_data == NULL) { return; } crm_trace("About to free %s data", fsa_cause2string(fsa_data->fsa_cause)); if (fsa_data->data != NULL) { switch (fsa_data->data_type) { case fsa_dt_ha_msg: delete_ha_msg_input(fsa_data->data); break; case fsa_dt_xml: foo = fsa_data->data; free_xml(foo); break; case fsa_dt_lrm: op = (lrmd_event_data_t *) fsa_data->data; lrmd_free_event(op); break; case fsa_dt_none: if (fsa_data->data != NULL) { crm_err("Dont know how to free %s data from %s", fsa_cause2string(fsa_data->fsa_cause), fsa_data->origin); crmd_exit(1); } break; } crm_trace("%s data freed", fsa_cause2string(fsa_data->fsa_cause)); } free(fsa_data); } /* returns the next message */ fsa_data_t * get_message(void) { fsa_data_t *message = g_list_nth_data(fsa_message_queue, 0); fsa_message_queue = g_list_remove(fsa_message_queue, message); crm_trace("Processing input %d", message->id); return message; } /* returns the current head of the FIFO queue */ gboolean is_message(void) { return (g_list_length(fsa_message_queue) > 0); } void * fsa_typed_data_adv(fsa_data_t * fsa_data, enum fsa_data_type a_type, const char *caller) { void *ret_val = NULL; if (fsa_data == NULL) { crm_err("%s: No FSA data available", caller); } else if (fsa_data->data == NULL) { crm_err("%s: No message data available. Origin: %s", caller, fsa_data->origin); } else if (fsa_data->data_type != a_type) { crm_crit("%s: Message data was the wrong type! %d vs. requested=%d. Origin: %s", caller, fsa_data->data_type, a_type, fsa_data->origin); CRM_ASSERT(fsa_data->data_type == a_type); } else { ret_val = fsa_data->data; } return ret_val; } /* A_MSG_ROUTE */ void do_msg_route(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) { ha_msg_input_t *input = fsa_typed_data(fsa_dt_ha_msg); route_message(msg_data->fsa_cause, input->msg); } void route_message(enum crmd_fsa_cause cause, xmlNode * input) { ha_msg_input_t fsa_input; enum crmd_fsa_input result = I_NULL; fsa_input.msg = input; CRM_CHECK(cause == C_IPC_MESSAGE || cause == C_HA_MESSAGE, return); /* try passing the buck first */ if (relay_message(input, cause == C_IPC_MESSAGE)) { return; } /* handle locally */ result = handle_message(input); /* done or process later? */ switch (result) { case I_NULL: case I_CIB_OP: case I_ROUTER: case I_NODE_JOIN: case I_JOIN_REQUEST: case I_JOIN_RESULT: break; default: /* Defering local processing of message */ register_fsa_input_later(cause, result, &fsa_input); return; } if (result != I_NULL) { /* add to the front of the queue */ register_fsa_input(cause, result, &fsa_input); } } gboolean relay_message(xmlNode * msg, gboolean originated_locally) { int dest = 1; int is_for_dc = 0; int is_for_dcib = 0; int is_for_te = 0; int is_for_crm = 0; int is_for_cib = 0; int is_local = 0; gboolean processing_complete = FALSE; const char *host_to = crm_element_value(msg, F_CRM_HOST_TO); const char *sys_to = crm_element_value(msg, F_CRM_SYS_TO); const char *sys_from = crm_element_value(msg, F_CRM_SYS_FROM); const char *type = crm_element_value(msg, F_TYPE); const char *msg_error = NULL; crm_trace("Routing message %s", crm_element_value(msg, XML_ATTR_REFERENCE)); if (msg == NULL) { msg_error = "Cannot route empty message"; } else if (safe_str_eq(CRM_OP_HELLO, crm_element_value(msg, F_CRM_TASK))) { /* quietly ignore */ processing_complete = TRUE; } else if (safe_str_neq(type, T_CRM)) { msg_error = "Bad message type"; } else if (sys_to == NULL) { msg_error = "Bad message destination: no subsystem"; } if (msg_error != NULL) { processing_complete = TRUE; crm_err("%s", msg_error); crm_log_xml_warn(msg, "bad msg"); } if (processing_complete) { return TRUE; } processing_complete = TRUE; is_for_dc = (strcasecmp(CRM_SYSTEM_DC, sys_to) == 0); is_for_dcib = (strcasecmp(CRM_SYSTEM_DCIB, sys_to) == 0); is_for_te = (strcasecmp(CRM_SYSTEM_TENGINE, sys_to) == 0); is_for_cib = (strcasecmp(CRM_SYSTEM_CIB, sys_to) == 0); is_for_crm = (strcasecmp(CRM_SYSTEM_CRMD, sys_to) == 0); is_local = 0; if (host_to == NULL || strlen(host_to) == 0) { if (is_for_dc || is_for_te) { is_local = 0; } else if (is_for_crm && originated_locally) { is_local = 0; } else { is_local = 1; } } else if (safe_str_eq(fsa_our_uname, host_to)) { is_local = 1; } if (is_for_dc || is_for_dcib || is_for_te) { if (AM_I_DC && is_for_te) { ROUTER_RESULT("Message result: Local relay"); send_msg_via_ipc(msg, sys_to); } else if (AM_I_DC) { ROUTER_RESULT("Message result: DC/CRMd process"); processing_complete = FALSE; /* more to be done by caller */ } else if (originated_locally && safe_str_neq(sys_from, CRM_SYSTEM_PENGINE) && safe_str_neq(sys_from, CRM_SYSTEM_TENGINE)) { /* Neither the TE or PE should be sending messages * to DC's on other nodes * * By definition, if we are no longer the DC, then * the PE or TE's data should be discarded */ #if SUPPORT_COROSYNC if (is_openais_cluster()) { dest = text2msg_type(sys_to); } #endif ROUTER_RESULT("Message result: External relay to DC"); send_cluster_message(host_to ? crm_get_peer(0, host_to) : NULL, dest, msg, TRUE); } else { /* discard */ ROUTER_RESULT("Message result: Discard, not DC"); } } else if (is_local && (is_for_crm || is_for_cib)) { ROUTER_RESULT("Message result: CRMd process"); processing_complete = FALSE; /* more to be done by caller */ } else if (is_local) { ROUTER_RESULT("Message result: Local relay"); send_msg_via_ipc(msg, sys_to); } else { #if SUPPORT_COROSYNC if (is_openais_cluster()) { dest = text2msg_type(sys_to); } #endif ROUTER_RESULT("Message result: External relay"); send_cluster_message(host_to ? crm_get_peer(0, host_to) : NULL, dest, msg, TRUE); } return processing_complete; } static gboolean process_hello_message(xmlNode * hello, char **uuid, char **client_name, char **major_version, char **minor_version) { const char *local_uuid; const char *local_client_name; const char *local_major_version; const char *local_minor_version; *uuid = NULL; *client_name = NULL; *major_version = NULL; *minor_version = NULL; if (hello == NULL) { return FALSE; } local_uuid = crm_element_value(hello, "client_uuid"); local_client_name = crm_element_value(hello, "client_name"); local_major_version = crm_element_value(hello, "major_version"); local_minor_version = crm_element_value(hello, "minor_version"); if (local_uuid == NULL || strlen(local_uuid) == 0) { crm_err("Hello message was not valid (field %s not found)", "uuid"); return FALSE; } else if (local_client_name == NULL || strlen(local_client_name) == 0) { crm_err("Hello message was not valid (field %s not found)", "client name"); return FALSE; } else if (local_major_version == NULL || strlen(local_major_version) == 0) { crm_err("Hello message was not valid (field %s not found)", "major version"); return FALSE; } else if (local_minor_version == NULL || strlen(local_minor_version) == 0) { crm_err("Hello message was not valid (field %s not found)", "minor version"); return FALSE; } *uuid = strdup(local_uuid); *client_name = strdup(local_client_name); *major_version = strdup(local_major_version); *minor_version = strdup(local_minor_version); crm_trace("Hello message ok"); return TRUE; } gboolean crmd_authorize_message(xmlNode * client_msg, crmd_client_t * curr_client) { /* check the best case first */ const char *sys_from = crm_element_value(client_msg, F_CRM_SYS_FROM); char *uuid = NULL; char *client_name = NULL; char *major_version = NULL; char *minor_version = NULL; const char *filtered_from; gpointer table_key = NULL; gboolean auth_result = FALSE; gboolean can_reply = FALSE; /* no-one has registered with this id */ xmlNode *xml = NULL; const char *op = crm_element_value(client_msg, F_CRM_TASK); if (safe_str_neq(CRM_OP_HELLO, op)) { if (sys_from == NULL) { crm_warn("Message [%s] was had no value for %s... discarding", crm_element_value(client_msg, XML_ATTR_REFERENCE), F_CRM_SYS_FROM); return FALSE; } filtered_from = sys_from; /* The CIB can have two names on the DC */ if (strcasecmp(sys_from, CRM_SYSTEM_DCIB) == 0) filtered_from = CRM_SYSTEM_CIB; if (g_hash_table_lookup(ipc_clients, filtered_from) != NULL) { can_reply = TRUE; /* reply can be routed */ } crm_trace("Message reply can%s be routed from %s.", can_reply ? "" : " not", sys_from); if (can_reply == FALSE) { crm_warn("Message [%s] not authorized", crm_element_value(client_msg, XML_ATTR_REFERENCE)); } return can_reply; } crm_trace("received client join msg"); crm_log_xml_trace(client_msg, "join"); xml = get_message_xml(client_msg, F_CRM_DATA); auth_result = process_hello_message(xml, &uuid, &client_name, &major_version, &minor_version); if (auth_result == TRUE) { if (client_name == NULL || uuid == NULL) { crm_err("Bad client details (client_name=%s, uuid=%s)", crm_str(client_name), crm_str(uuid)); auth_result = FALSE; } } if (auth_result == TRUE) { /* check version */ int mav = atoi(major_version); int miv = atoi(minor_version); crm_trace("Checking client version number"); if (mav < 0 || miv < 0) { crm_err("Client version (%d:%d) is not acceptable", mav, miv); auth_result = FALSE; } } table_key = (gpointer) generate_hash_key(client_name, uuid); if (auth_result == TRUE) { crm_trace("Accepted client %s", crm_str(table_key)); curr_client->table_key = table_key; curr_client->sub_sys = strdup(client_name); curr_client->uuid = strdup(uuid); g_hash_table_insert(ipc_clients, table_key, curr_client->ipc); crm_trace("Updated client list with %s", crm_str(table_key)); crm_trace("Triggering FSA: %s", __FUNCTION__); mainloop_set_trigger(fsa_source); } else { free(table_key); crm_warn("Rejected client logon request"); qb_ipcs_disconnect(curr_client->ipc); } free(uuid); free(minor_version); free(major_version); free(client_name); /* hello messages should never be processed further */ return FALSE; } enum crmd_fsa_input handle_message(xmlNode * msg) { const char *type = NULL; CRM_CHECK(msg != NULL, return I_NULL); type = crm_element_value(msg, F_CRM_MSG_TYPE); if (crm_str_eq(type, XML_ATTR_REQUEST, TRUE)) { return handle_request(msg); } else if (crm_str_eq(type, XML_ATTR_RESPONSE, TRUE)) { handle_response(msg); return I_NULL; } crm_err("Unknown message type: %s", type); return I_NULL; } static enum crmd_fsa_input handle_failcount_op(xmlNode * stored_msg) { const char *rsc = NULL; xmlNode *xml_rsc = get_xpath_object("//" XML_CIB_TAG_RESOURCE, stored_msg, LOG_ERR); if (xml_rsc) { rsc = ID(xml_rsc); } if (rsc) { char *attr = NULL; crm_info("Removing failcount for %s", rsc); attr = crm_concat("fail-count", rsc, '-'); update_attrd(NULL, attr, NULL, NULL); free(attr); attr = crm_concat("last-failure", rsc, '-'); update_attrd(NULL, attr, NULL, NULL); free(attr); lrm_clear_last_failure(rsc); } else { crm_log_xml_warn(stored_msg, "invalid failcount op"); } return I_NULL; } enum crmd_fsa_input handle_request(xmlNode * stored_msg) { xmlNode *msg = NULL; const char *op = crm_element_value(stored_msg, F_CRM_TASK); /* Optimize this for the DC - it has the most to do */ if (op == NULL) { crm_log_xml_err(stored_msg, "Bad message"); return I_NULL; } /*========== DC-Only Actions ==========*/ if (AM_I_DC) { if (strcmp(op, CRM_OP_JOIN_ANNOUNCE) == 0) { return I_NODE_JOIN; } else if (strcmp(op, CRM_OP_JOIN_REQUEST) == 0) { return I_JOIN_REQUEST; } else if (strcmp(op, CRM_OP_JOIN_CONFIRM) == 0) { return I_JOIN_RESULT; } else if (strcmp(op, CRM_OP_SHUTDOWN) == 0) { const char *host_from = crm_element_value(stored_msg, F_CRM_HOST_FROM); gboolean dc_match = safe_str_eq(host_from, fsa_our_dc); if (is_set(fsa_input_register, R_SHUTDOWN)) { crm_info("Shutting ourselves down (DC)"); return I_STOP; } else if (dc_match) { crm_err("We didnt ask to be shut down, yet our" " TE is telling us too." " Better get out now!"); return I_TERMINATE; } else if (fsa_state != S_STOPPING) { crm_err("Another node is asking us to shutdown" " but we think we're ok."); return I_ELECTION; } } else if (strcmp(op, CRM_OP_SHUTDOWN_REQ) == 0) { /* a slave wants to shut down */ /* create cib fragment and add to message */ return handle_shutdown_request(stored_msg); } } /*========== common actions ==========*/ if (strcmp(op, CRM_OP_NOVOTE) == 0) { ha_msg_input_t fsa_input; fsa_input.msg = stored_msg; register_fsa_input_adv(C_HA_MESSAGE, I_NULL, &fsa_input, A_ELECTION_COUNT | A_ELECTION_CHECK, FALSE, __FUNCTION__); } else if (strcmp(op, CRM_OP_CLEAR_FAILCOUNT) == 0) { return handle_failcount_op(stored_msg); } else if (strcmp(op, CRM_OP_VOTE) == 0) { /* count the vote and decide what to do after that */ ha_msg_input_t fsa_input; fsa_input.msg = stored_msg; register_fsa_input_adv(C_HA_MESSAGE, I_NULL, &fsa_input, A_ELECTION_COUNT | A_ELECTION_CHECK, FALSE, __FUNCTION__); /* Sometimes we _must_ go into S_ELECTION */ if (fsa_state == S_HALT) { crm_debug("Forcing an election from S_HALT"); return I_ELECTION; #if 0 } else if (AM_I_DC) { /* This is the old way of doing things but what is gained? */ return I_ELECTION; #endif } } else if (strcmp(op, CRM_OP_JOIN_OFFER) == 0) { crm_debug("Raising I_JOIN_OFFER: join-%s", crm_element_value(stored_msg, F_CRM_JOIN_ID)); return I_JOIN_OFFER; } else if (strcmp(op, CRM_OP_JOIN_ACKNAK) == 0) { crm_debug("Raising I_JOIN_RESULT: join-%s", crm_element_value(stored_msg, F_CRM_JOIN_ID)); return I_JOIN_RESULT; } else if (strcmp(op, CRM_OP_LRM_DELETE) == 0 || strcmp(op, CRM_OP_LRM_FAIL) == 0 || strcmp(op, CRM_OP_LRM_REFRESH) == 0 || strcmp(op, CRM_OP_REPROBE) == 0) { crm_xml_add(stored_msg, F_CRM_SYS_TO, CRM_SYSTEM_LRMD); return I_ROUTER; } else if (strcmp(op, CRM_OP_NOOP) == 0) { return I_NULL; } else if (strcmp(op, CRM_OP_LOCAL_SHUTDOWN) == 0) { crm_shutdown(SIGTERM); /*return I_SHUTDOWN; */ return I_NULL; /*========== (NOT_DC)-Only Actions ==========*/ } else if (AM_I_DC == FALSE && strcmp(op, CRM_OP_SHUTDOWN) == 0) { const char *host_from = crm_element_value(stored_msg, F_CRM_HOST_FROM); gboolean dc_match = safe_str_eq(host_from, fsa_our_dc); if (dc_match || fsa_our_dc == NULL) { if (is_set(fsa_input_register, R_SHUTDOWN) == FALSE) { crm_err("We didn't ask to be shut down, yet our" " DC is telling us too."); set_bit(fsa_input_register, R_STAYDOWN); return I_STOP; } crm_info("Shutting down"); return I_STOP; } else { crm_warn("Discarding %s op from %s", op, host_from); } } else if (strcmp(op, CRM_OP_PING) == 0) { /* eventually do some stuff to figure out * if we /are/ ok */ const char *sys_to = crm_element_value(stored_msg, F_CRM_SYS_TO); xmlNode *ping = create_xml_node(NULL, XML_CRM_TAG_PING); crm_xml_add(ping, XML_PING_ATTR_STATUS, "ok"); crm_xml_add(ping, XML_PING_ATTR_SYSFROM, sys_to); crm_xml_add(ping, "crmd_state", fsa_state2string(fsa_state)); /* Ok, so technically not so interesting, but CTS needs to see this */ crm_notice("Current ping state: %s", fsa_state2string(fsa_state)); msg = create_reply(stored_msg, ping); relay_message(msg, TRUE); free_xml(ping); free_xml(msg); } else if (strcmp(op, CRM_OP_RM_NODE_CACHE) == 0) { int id = 0; const char *name = NULL; xmlNode *options = get_xpath_object("//"XML_TAG_OPTIONS, stored_msg, LOG_ERR); if (options) { crm_element_value_int(options, XML_ATTR_ID, &id); name = crm_element_value(options, XML_ATTR_UNAME); } reap_crm_member(id, name); } else { crm_err("Unexpected request (%s) sent to %s", op, AM_I_DC ? "the DC" : "non-DC node"); crm_log_xml_err(stored_msg, "Unexpected"); } return I_NULL; } void handle_response(xmlNode * stored_msg) { const char *op = crm_element_value(stored_msg, F_CRM_TASK); if (op == NULL) { crm_log_xml_err(stored_msg, "Bad message"); } else if (AM_I_DC && strcmp(op, CRM_OP_PECALC) == 0) { /* Check if the PE answer been superceeded by a subsequent request? */ const char *msg_ref = crm_element_value(stored_msg, XML_ATTR_REFERENCE); if (msg_ref == NULL) { crm_err("%s - Ignoring calculation with no reference", op); } else if (safe_str_eq(msg_ref, fsa_pe_ref)) { ha_msg_input_t fsa_input; fsa_input.msg = stored_msg; register_fsa_input_later(C_IPC_MESSAGE, I_PE_SUCCESS, &fsa_input); crm_trace("Completed: %s...", fsa_pe_ref); } else { crm_info("%s calculation %s is obsolete", op, msg_ref); } } else if (strcmp(op, CRM_OP_VOTE) == 0 || strcmp(op, CRM_OP_SHUTDOWN_REQ) == 0 || strcmp(op, CRM_OP_SHUTDOWN) == 0) { } else { const char *host_from = crm_element_value(stored_msg, F_CRM_HOST_FROM); crm_err("Unexpected response (op=%s, src=%s) sent to the %s", op, host_from, AM_I_DC ? "DC" : "CRMd"); } } enum crmd_fsa_input handle_shutdown_request(xmlNode * stored_msg) { /* handle here to avoid potential version issues * where the shutdown message/proceedure may have * been changed in later versions. * * This way the DC is always in control of the shutdown */ char *now_s = NULL; time_t now = time(NULL); const char *host_from = crm_element_value(stored_msg, F_CRM_HOST_FROM); if (host_from == NULL) { /* we're shutting down and the DC */ host_from = fsa_our_uname; } crm_info("Creating shutdown request for %s (state=%s)", host_from, fsa_state2string(fsa_state)); crm_log_xml_trace(stored_msg, "message"); now_s = crm_itoa(now); update_attrd(host_from, XML_CIB_ATTR_SHUTDOWN, now_s, NULL); free(now_s); /* will be picked up by the TE as long as its running */ return I_NULL; } /* msg is deleted by the time this returns */ extern gboolean process_te_message(xmlNode * msg, xmlNode * xml_data); gboolean send_msg_via_ipc(xmlNode * msg, const char *sys) { gboolean send_ok = TRUE; qb_ipcs_connection_t *client_channel; client_channel = (qb_ipcs_connection_t *) g_hash_table_lookup(ipc_clients, sys); if (crm_element_value(msg, F_CRM_HOST_FROM) == NULL) { crm_xml_add(msg, F_CRM_HOST_FROM, fsa_our_uname); } if (client_channel != NULL) { /* Transient clients such as crmadmin */ send_ok = crm_ipcs_send(client_channel, 0, msg, TRUE); } else if (sys != NULL && strcmp(sys, CRM_SYSTEM_TENGINE) == 0) { xmlNode *data = get_message_xml(msg, F_CRM_DATA); process_te_message(msg, data); } else if (sys != NULL && strcmp(sys, CRM_SYSTEM_LRMD) == 0) { fsa_data_t fsa_data; ha_msg_input_t fsa_input; fsa_input.msg = msg; fsa_input.xml = get_message_xml(msg, F_CRM_DATA); fsa_data.id = 0; fsa_data.actions = 0; fsa_data.data = &fsa_input; fsa_data.fsa_input = I_MESSAGE; fsa_data.fsa_cause = C_IPC_MESSAGE; fsa_data.origin = __FUNCTION__; fsa_data.data_type = fsa_dt_ha_msg; #ifdef FSA_TRACE crm_trace("Invoking action A_LRM_INVOKE (%.16llx)", A_LRM_INVOKE); #endif do_lrm_invoke(A_LRM_INVOKE, C_IPC_MESSAGE, fsa_state, I_MESSAGE, &fsa_data); } else { crm_err("Unknown Sub-system (%s)... discarding message.", crm_str(sys)); send_ok = FALSE; } return send_ok; } ha_msg_input_t * new_ha_msg_input(xmlNode * orig) { ha_msg_input_t *input_copy = NULL; input_copy = calloc(1, sizeof(ha_msg_input_t)); input_copy->msg = orig; input_copy->xml = get_message_xml(input_copy->msg, F_CRM_DATA); return input_copy; } void delete_ha_msg_input(ha_msg_input_t * orig) { if (orig == NULL) { return; } free_xml(orig->msg); free(orig); }